mirror of
https://github.com/torvalds/linux.git
synced 2024-09-29 03:13:05 +00:00
staging: ccg: include all sourced files
This Android gadget includes a bunch of .c files. Fixing normal gadgets is not the real problem but this gadget is not always fixable since the problem here are fundumential / design. *I* wanted to get this removed but other people want to keep it even though there were reports that Android itself is not using it. Some poeple think that it is better to have this instead of nothing and other argue that they need sdb and mass storage gadget. The sdb function is not provided by ccg so I don't see the point of this. I don't see any logical reasoning behind it and I decided that it is time for retreat. This patch brings all dependencies of ccg into staging so I can do whatever I want in drivers/usb/gadget without breaking ccg. Cc: devel@driverdev.osuosl.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Sebastian Andrzej Siewior
Felipe Balbi
parent
93952956c7
commit
e220ff75db
|
|
@ -1,4 +1,2 @@
|
|||
g_ccg-y := ccg.o
|
||||
ccflags-y += -Idrivers/usb/gadget
|
||||
|
||||
obj-$(CONFIG_USB_G_CCG) += g_ccg.o
|
||||
|
|
|
|||
|
|
@ -32,7 +32,7 @@
|
|||
#include <linux/platform_device.h>
|
||||
|
||||
#include <linux/usb/ch9.h>
|
||||
#include <linux/usb/composite.h>
|
||||
#include "composite.h"
|
||||
#include <linux/usb/gadget.h>
|
||||
|
||||
#include "gadget_chips.h"
|
||||
|
|
@ -44,19 +44,19 @@
|
|||
* the runtime footprint, and giving us at least some parts of what
|
||||
* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
|
||||
*/
|
||||
#include "../../usb/gadget/usbstring.c"
|
||||
#include "../../usb/gadget/config.c"
|
||||
#include "../../usb/gadget/epautoconf.c"
|
||||
#include "../../usb/gadget/composite.c"
|
||||
#include "usbstring.c"
|
||||
#include "config.c"
|
||||
#include "epautoconf.c"
|
||||
#include "composite.c"
|
||||
|
||||
#include "../../usb/gadget/f_mass_storage.c"
|
||||
#include "../../usb/gadget/u_serial.c"
|
||||
#include "../../usb/gadget/f_acm.c"
|
||||
#include "f_mass_storage.c"
|
||||
#include "u_serial.c"
|
||||
#include "f_acm.c"
|
||||
#define USB_ETH_RNDIS y
|
||||
#include "../../usb/gadget/f_rndis.c"
|
||||
#include "../../usb/gadget/rndis.c"
|
||||
#include "../../usb/gadget/u_ether.c"
|
||||
#include "../../usb/gadget/f_fs.c"
|
||||
#include "f_rndis.c"
|
||||
#include "rndis.c"
|
||||
#include "u_ether.c"
|
||||
#include "f_fs.c"
|
||||
|
||||
MODULE_AUTHOR("Mike Lockwood, Andrzej Pietrasiewicz");
|
||||
MODULE_DESCRIPTION("Configurable Composite USB Gadget");
|
||||
|
|
|
|||
1687
drivers/staging/ccg/composite.c
Normal file
1687
drivers/staging/ccg/composite.c
Normal file
File diff suppressed because it is too large
Load Diff
395
drivers/staging/ccg/composite.h
Normal file
395
drivers/staging/ccg/composite.h
Normal file
|
|
@ -0,0 +1,395 @@
|
|||
/*
|
||||
* composite.h -- framework for usb gadgets which are composite devices
|
||||
*
|
||||
* Copyright (C) 2006-2008 David Brownell
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#ifndef __LINUX_USB_COMPOSITE_H
|
||||
#define __LINUX_USB_COMPOSITE_H
|
||||
|
||||
/*
|
||||
* This framework is an optional layer on top of the USB Gadget interface,
|
||||
* making it easier to build (a) Composite devices, supporting multiple
|
||||
* functions within any single configuration, and (b) Multi-configuration
|
||||
* devices, also supporting multiple functions but without necessarily
|
||||
* having more than one function per configuration.
|
||||
*
|
||||
* Example: a device with a single configuration supporting both network
|
||||
* link and mass storage functions is a composite device. Those functions
|
||||
* might alternatively be packaged in individual configurations, but in
|
||||
* the composite model the host can use both functions at the same time.
|
||||
*/
|
||||
|
||||
#include <linux/usb/ch9.h>
|
||||
#include <linux/usb/gadget.h>
|
||||
|
||||
/*
|
||||
* USB function drivers should return USB_GADGET_DELAYED_STATUS if they
|
||||
* wish to delay the data/status stages of the control transfer till they
|
||||
* are ready. The control transfer will then be kept from completing till
|
||||
* all the function drivers that requested for USB_GADGET_DELAYED_STAUS
|
||||
* invoke usb_composite_setup_continue().
|
||||
*/
|
||||
#define USB_GADGET_DELAYED_STATUS 0x7fff /* Impossibly large value */
|
||||
|
||||
struct usb_configuration;
|
||||
|
||||
/**
|
||||
* struct usb_function - describes one function of a configuration
|
||||
* @name: For diagnostics, identifies the function.
|
||||
* @strings: tables of strings, keyed by identifiers assigned during bind()
|
||||
* and by language IDs provided in control requests
|
||||
* @descriptors: Table of full (or low) speed descriptors, using interface and
|
||||
* string identifiers assigned during @bind(). If this pointer is null,
|
||||
* the function will not be available at full speed (or at low speed).
|
||||
* @hs_descriptors: Table of high speed descriptors, using interface and
|
||||
* string identifiers assigned during @bind(). If this pointer is null,
|
||||
* the function will not be available at high speed.
|
||||
* @ss_descriptors: Table of super speed descriptors, using interface and
|
||||
* string identifiers assigned during @bind(). If this
|
||||
* pointer is null after initiation, the function will not
|
||||
* be available at super speed.
|
||||
* @config: assigned when @usb_add_function() is called; this is the
|
||||
* configuration with which this function is associated.
|
||||
* @bind: Before the gadget can register, all of its functions bind() to the
|
||||
* available resources including string and interface identifiers used
|
||||
* in interface or class descriptors; endpoints; I/O buffers; and so on.
|
||||
* @unbind: Reverses @bind; called as a side effect of unregistering the
|
||||
* driver which added this function.
|
||||
* @set_alt: (REQUIRED) Reconfigures altsettings; function drivers may
|
||||
* initialize usb_ep.driver data at this time (when it is used).
|
||||
* Note that setting an interface to its current altsetting resets
|
||||
* interface state, and that all interfaces have a disabled state.
|
||||
* @get_alt: Returns the active altsetting. If this is not provided,
|
||||
* then only altsetting zero is supported.
|
||||
* @disable: (REQUIRED) Indicates the function should be disabled. Reasons
|
||||
* include host resetting or reconfiguring the gadget, and disconnection.
|
||||
* @setup: Used for interface-specific control requests.
|
||||
* @suspend: Notifies functions when the host stops sending USB traffic.
|
||||
* @resume: Notifies functions when the host restarts USB traffic.
|
||||
* @get_status: Returns function status as a reply to
|
||||
* GetStatus() request when the recepient is Interface.
|
||||
* @func_suspend: callback to be called when
|
||||
* SetFeature(FUNCTION_SUSPEND) is reseived
|
||||
*
|
||||
* A single USB function uses one or more interfaces, and should in most
|
||||
* cases support operation at both full and high speeds. Each function is
|
||||
* associated by @usb_add_function() with a one configuration; that function
|
||||
* causes @bind() to be called so resources can be allocated as part of
|
||||
* setting up a gadget driver. Those resources include endpoints, which
|
||||
* should be allocated using @usb_ep_autoconfig().
|
||||
*
|
||||
* To support dual speed operation, a function driver provides descriptors
|
||||
* for both high and full speed operation. Except in rare cases that don't
|
||||
* involve bulk endpoints, each speed needs different endpoint descriptors.
|
||||
*
|
||||
* Function drivers choose their own strategies for managing instance data.
|
||||
* The simplest strategy just declares it "static', which means the function
|
||||
* can only be activated once. If the function needs to be exposed in more
|
||||
* than one configuration at a given speed, it needs to support multiple
|
||||
* usb_function structures (one for each configuration).
|
||||
*
|
||||
* A more complex strategy might encapsulate a @usb_function structure inside
|
||||
* a driver-specific instance structure to allows multiple activations. An
|
||||
* example of multiple activations might be a CDC ACM function that supports
|
||||
* two or more distinct instances within the same configuration, providing
|
||||
* several independent logical data links to a USB host.
|
||||
*/
|
||||
struct usb_function {
|
||||
const char *name;
|
||||
struct usb_gadget_strings **strings;
|
||||
struct usb_descriptor_header **descriptors;
|
||||
struct usb_descriptor_header **hs_descriptors;
|
||||
struct usb_descriptor_header **ss_descriptors;
|
||||
|
||||
struct usb_configuration *config;
|
||||
|
||||
/* REVISIT: bind() functions can be marked __init, which
|
||||
* makes trouble for section mismatch analysis. See if
|
||||
* we can't restructure things to avoid mismatching.
|
||||
* Related: unbind() may kfree() but bind() won't...
|
||||
*/
|
||||
|
||||
/* configuration management: bind/unbind */
|
||||
int (*bind)(struct usb_configuration *,
|
||||
struct usb_function *);
|
||||
void (*unbind)(struct usb_configuration *,
|
||||
struct usb_function *);
|
||||
|
||||
/* runtime state management */
|
||||
int (*set_alt)(struct usb_function *,
|
||||
unsigned interface, unsigned alt);
|
||||
int (*get_alt)(struct usb_function *,
|
||||
unsigned interface);
|
||||
void (*disable)(struct usb_function *);
|
||||
int (*setup)(struct usb_function *,
|
||||
const struct usb_ctrlrequest *);
|
||||
void (*suspend)(struct usb_function *);
|
||||
void (*resume)(struct usb_function *);
|
||||
|
||||
/* USB 3.0 additions */
|
||||
int (*get_status)(struct usb_function *);
|
||||
int (*func_suspend)(struct usb_function *,
|
||||
u8 suspend_opt);
|
||||
/* private: */
|
||||
/* internals */
|
||||
struct list_head list;
|
||||
DECLARE_BITMAP(endpoints, 32);
|
||||
};
|
||||
|
||||
int usb_add_function(struct usb_configuration *, struct usb_function *);
|
||||
|
||||
int usb_function_deactivate(struct usb_function *);
|
||||
int usb_function_activate(struct usb_function *);
|
||||
|
||||
int usb_interface_id(struct usb_configuration *, struct usb_function *);
|
||||
|
||||
int config_ep_by_speed(struct usb_gadget *g, struct usb_function *f,
|
||||
struct usb_ep *_ep);
|
||||
|
||||
#define MAX_CONFIG_INTERFACES 16 /* arbitrary; max 255 */
|
||||
|
||||
/**
|
||||
* struct usb_configuration - represents one gadget configuration
|
||||
* @label: For diagnostics, describes the configuration.
|
||||
* @strings: Tables of strings, keyed by identifiers assigned during @bind()
|
||||
* and by language IDs provided in control requests.
|
||||
* @descriptors: Table of descriptors preceding all function descriptors.
|
||||
* Examples include OTG and vendor-specific descriptors.
|
||||
* @unbind: Reverses @bind; called as a side effect of unregistering the
|
||||
* driver which added this configuration.
|
||||
* @setup: Used to delegate control requests that aren't handled by standard
|
||||
* device infrastructure or directed at a specific interface.
|
||||
* @bConfigurationValue: Copied into configuration descriptor.
|
||||
* @iConfiguration: Copied into configuration descriptor.
|
||||
* @bmAttributes: Copied into configuration descriptor.
|
||||
* @bMaxPower: Copied into configuration descriptor.
|
||||
* @cdev: assigned by @usb_add_config() before calling @bind(); this is
|
||||
* the device associated with this configuration.
|
||||
*
|
||||
* Configurations are building blocks for gadget drivers structured around
|
||||
* function drivers. Simple USB gadgets require only one function and one
|
||||
* configuration, and handle dual-speed hardware by always providing the same
|
||||
* functionality. Slightly more complex gadgets may have more than one
|
||||
* single-function configuration at a given speed; or have configurations
|
||||
* that only work at one speed.
|
||||
*
|
||||
* Composite devices are, by definition, ones with configurations which
|
||||
* include more than one function.
|
||||
*
|
||||
* The lifecycle of a usb_configuration includes allocation, initialization
|
||||
* of the fields described above, and calling @usb_add_config() to set up
|
||||
* internal data and bind it to a specific device. The configuration's
|
||||
* @bind() method is then used to initialize all the functions and then
|
||||
* call @usb_add_function() for them.
|
||||
*
|
||||
* Those functions would normally be independent of each other, but that's
|
||||
* not mandatory. CDC WMC devices are an example where functions often
|
||||
* depend on other functions, with some functions subsidiary to others.
|
||||
* Such interdependency may be managed in any way, so long as all of the
|
||||
* descriptors complete by the time the composite driver returns from
|
||||
* its bind() routine.
|
||||
*/
|
||||
struct usb_configuration {
|
||||
const char *label;
|
||||
struct usb_gadget_strings **strings;
|
||||
const struct usb_descriptor_header **descriptors;
|
||||
|
||||
/* REVISIT: bind() functions can be marked __init, which
|
||||
* makes trouble for section mismatch analysis. See if
|
||||
* we can't restructure things to avoid mismatching...
|
||||
*/
|
||||
|
||||
/* configuration management: unbind/setup */
|
||||
void (*unbind)(struct usb_configuration *);
|
||||
int (*setup)(struct usb_configuration *,
|
||||
const struct usb_ctrlrequest *);
|
||||
|
||||
/* fields in the config descriptor */
|
||||
u8 bConfigurationValue;
|
||||
u8 iConfiguration;
|
||||
u8 bmAttributes;
|
||||
u8 bMaxPower;
|
||||
|
||||
struct usb_composite_dev *cdev;
|
||||
|
||||
/* private: */
|
||||
/* internals */
|
||||
struct list_head list;
|
||||
struct list_head functions;
|
||||
u8 next_interface_id;
|
||||
unsigned superspeed:1;
|
||||
unsigned highspeed:1;
|
||||
unsigned fullspeed:1;
|
||||
struct usb_function *interface[MAX_CONFIG_INTERFACES];
|
||||
};
|
||||
|
||||
int usb_add_config(struct usb_composite_dev *,
|
||||
struct usb_configuration *,
|
||||
int (*)(struct usb_configuration *));
|
||||
|
||||
void usb_remove_config(struct usb_composite_dev *,
|
||||
struct usb_configuration *);
|
||||
|
||||
/**
|
||||
* struct usb_composite_driver - groups configurations into a gadget
|
||||
* @name: For diagnostics, identifies the driver.
|
||||
* @iProduct: Used as iProduct override if @dev->iProduct is not set.
|
||||
* If NULL value of @name is taken.
|
||||
* @iManufacturer: Used as iManufacturer override if @dev->iManufacturer is
|
||||
* not set. If NULL a default "<system> <release> with <udc>" value
|
||||
* will be used.
|
||||
* @iSerialNumber: Used as iSerialNumber override if @dev->iSerialNumber is
|
||||
* not set.
|
||||
* @dev: Template descriptor for the device, including default device
|
||||
* identifiers.
|
||||
* @strings: tables of strings, keyed by identifiers assigned during @bind
|
||||
* and language IDs provided in control requests
|
||||
* @max_speed: Highest speed the driver supports.
|
||||
* @needs_serial: set to 1 if the gadget needs userspace to provide
|
||||
* a serial number. If one is not provided, warning will be printed.
|
||||
* @bind: (REQUIRED) Used to allocate resources that are shared across the
|
||||
* whole device, such as string IDs, and add its configurations using
|
||||
* @usb_add_config(). This may fail by returning a negative errno
|
||||
* value; it should return zero on successful initialization.
|
||||
* @unbind: Reverses @bind; called as a side effect of unregistering
|
||||
* this driver.
|
||||
* @disconnect: optional driver disconnect method
|
||||
* @suspend: Notifies when the host stops sending USB traffic,
|
||||
* after function notifications
|
||||
* @resume: Notifies configuration when the host restarts USB traffic,
|
||||
* before function notifications
|
||||
*
|
||||
* Devices default to reporting self powered operation. Devices which rely
|
||||
* on bus powered operation should report this in their @bind method.
|
||||
*
|
||||
* Before returning from @bind, various fields in the template descriptor
|
||||
* may be overridden. These include the idVendor/idProduct/bcdDevice values
|
||||
* normally to bind the appropriate host side driver, and the three strings
|
||||
* (iManufacturer, iProduct, iSerialNumber) normally used to provide user
|
||||
* meaningful device identifiers. (The strings will not be defined unless
|
||||
* they are defined in @dev and @strings.) The correct ep0 maxpacket size
|
||||
* is also reported, as defined by the underlying controller driver.
|
||||
*/
|
||||
struct usb_composite_driver {
|
||||
const char *name;
|
||||
const char *iProduct;
|
||||
const char *iManufacturer;
|
||||
const char *iSerialNumber;
|
||||
const struct usb_device_descriptor *dev;
|
||||
struct usb_gadget_strings **strings;
|
||||
enum usb_device_speed max_speed;
|
||||
unsigned needs_serial:1;
|
||||
|
||||
int (*bind)(struct usb_composite_dev *cdev);
|
||||
int (*unbind)(struct usb_composite_dev *);
|
||||
|
||||
void (*disconnect)(struct usb_composite_dev *);
|
||||
|
||||
/* global suspend hooks */
|
||||
void (*suspend)(struct usb_composite_dev *);
|
||||
void (*resume)(struct usb_composite_dev *);
|
||||
};
|
||||
|
||||
extern int usb_composite_probe(struct usb_composite_driver *driver);
|
||||
extern void usb_composite_unregister(struct usb_composite_driver *driver);
|
||||
extern void usb_composite_setup_continue(struct usb_composite_dev *cdev);
|
||||
|
||||
|
||||
/**
|
||||
* struct usb_composite_device - represents one composite usb gadget
|
||||
* @gadget: read-only, abstracts the gadget's usb peripheral controller
|
||||
* @req: used for control responses; buffer is pre-allocated
|
||||
* @bufsiz: size of buffer pre-allocated in @req
|
||||
* @config: the currently active configuration
|
||||
*
|
||||
* One of these devices is allocated and initialized before the
|
||||
* associated device driver's bind() is called.
|
||||
*
|
||||
* OPEN ISSUE: it appears that some WUSB devices will need to be
|
||||
* built by combining a normal (wired) gadget with a wireless one.
|
||||
* This revision of the gadget framework should probably try to make
|
||||
* sure doing that won't hurt too much.
|
||||
*
|
||||
* One notion for how to handle Wireless USB devices involves:
|
||||
* (a) a second gadget here, discovery mechanism TBD, but likely
|
||||
* needing separate "register/unregister WUSB gadget" calls;
|
||||
* (b) updates to usb_gadget to include flags "is it wireless",
|
||||
* "is it wired", plus (presumably in a wrapper structure)
|
||||
* bandgroup and PHY info;
|
||||
* (c) presumably a wireless_ep wrapping a usb_ep, and reporting
|
||||
* wireless-specific parameters like maxburst and maxsequence;
|
||||
* (d) configurations that are specific to wireless links;
|
||||
* (e) function drivers that understand wireless configs and will
|
||||
* support wireless for (additional) function instances;
|
||||
* (f) a function to support association setup (like CBAF), not
|
||||
* necessarily requiring a wireless adapter;
|
||||
* (g) composite device setup that can create one or more wireless
|
||||
* configs, including appropriate association setup support;
|
||||
* (h) more, TBD.
|
||||
*/
|
||||
struct usb_composite_dev {
|
||||
struct usb_gadget *gadget;
|
||||
struct usb_request *req;
|
||||
unsigned bufsiz;
|
||||
|
||||
struct usb_configuration *config;
|
||||
|
||||
/* private: */
|
||||
/* internals */
|
||||
unsigned int suspended:1;
|
||||
struct usb_device_descriptor desc;
|
||||
struct list_head configs;
|
||||
struct usb_composite_driver *driver;
|
||||
u8 next_string_id;
|
||||
u8 manufacturer_override;
|
||||
u8 product_override;
|
||||
u8 serial_override;
|
||||
|
||||
/* the gadget driver won't enable the data pullup
|
||||
* while the deactivation count is nonzero.
|
||||
*/
|
||||
unsigned deactivations;
|
||||
|
||||
/* the composite driver won't complete the control transfer's
|
||||
* data/status stages till delayed_status is zero.
|
||||
*/
|
||||
int delayed_status;
|
||||
|
||||
/* protects deactivations and delayed_status counts*/
|
||||
spinlock_t lock;
|
||||
};
|
||||
|
||||
extern int usb_string_id(struct usb_composite_dev *c);
|
||||
extern int usb_string_ids_tab(struct usb_composite_dev *c,
|
||||
struct usb_string *str);
|
||||
extern int usb_string_ids_n(struct usb_composite_dev *c, unsigned n);
|
||||
|
||||
|
||||
/* messaging utils */
|
||||
#define DBG(d, fmt, args...) \
|
||||
dev_dbg(&(d)->gadget->dev , fmt , ## args)
|
||||
#define VDBG(d, fmt, args...) \
|
||||
dev_vdbg(&(d)->gadget->dev , fmt , ## args)
|
||||
#define ERROR(d, fmt, args...) \
|
||||
dev_err(&(d)->gadget->dev , fmt , ## args)
|
||||
#define WARNING(d, fmt, args...) \
|
||||
dev_warn(&(d)->gadget->dev , fmt , ## args)
|
||||
#define INFO(d, fmt, args...) \
|
||||
dev_info(&(d)->gadget->dev , fmt , ## args)
|
||||
|
||||
#endif /* __LINUX_USB_COMPOSITE_H */
|
||||
158
drivers/staging/ccg/config.c
Normal file
158
drivers/staging/ccg/config.c
Normal file
|
|
@ -0,0 +1,158 @@
|
|||
/*
|
||||
* usb/gadget/config.c -- simplify building config descriptors
|
||||
*
|
||||
* Copyright (C) 2003 David Brownell
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*/
|
||||
|
||||
#include <linux/errno.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/device.h>
|
||||
|
||||
#include <linux/usb/ch9.h>
|
||||
#include <linux/usb/gadget.h>
|
||||
|
||||
|
||||
/**
|
||||
* usb_descriptor_fillbuf - fill buffer with descriptors
|
||||
* @buf: Buffer to be filled
|
||||
* @buflen: Size of buf
|
||||
* @src: Array of descriptor pointers, terminated by null pointer.
|
||||
*
|
||||
* Copies descriptors into the buffer, returning the length or a
|
||||
* negative error code if they can't all be copied. Useful when
|
||||
* assembling descriptors for an associated set of interfaces used
|
||||
* as part of configuring a composite device; or in other cases where
|
||||
* sets of descriptors need to be marshaled.
|
||||
*/
|
||||
int
|
||||
usb_descriptor_fillbuf(void *buf, unsigned buflen,
|
||||
const struct usb_descriptor_header **src)
|
||||
{
|
||||
u8 *dest = buf;
|
||||
|
||||
if (!src)
|
||||
return -EINVAL;
|
||||
|
||||
/* fill buffer from src[] until null descriptor ptr */
|
||||
for (; NULL != *src; src++) {
|
||||
unsigned len = (*src)->bLength;
|
||||
|
||||
if (len > buflen)
|
||||
return -EINVAL;
|
||||
memcpy(dest, *src, len);
|
||||
buflen -= len;
|
||||
dest += len;
|
||||
}
|
||||
return dest - (u8 *)buf;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* usb_gadget_config_buf - builts a complete configuration descriptor
|
||||
* @config: Header for the descriptor, including characteristics such
|
||||
* as power requirements and number of interfaces.
|
||||
* @desc: Null-terminated vector of pointers to the descriptors (interface,
|
||||
* endpoint, etc) defining all functions in this device configuration.
|
||||
* @buf: Buffer for the resulting configuration descriptor.
|
||||
* @length: Length of buffer. If this is not big enough to hold the
|
||||
* entire configuration descriptor, an error code will be returned.
|
||||
*
|
||||
* This copies descriptors into the response buffer, building a descriptor
|
||||
* for that configuration. It returns the buffer length or a negative
|
||||
* status code. The config.wTotalLength field is set to match the length
|
||||
* of the result, but other descriptor fields (including power usage and
|
||||
* interface count) must be set by the caller.
|
||||
*
|
||||
* Gadget drivers could use this when constructing a config descriptor
|
||||
* in response to USB_REQ_GET_DESCRIPTOR. They will need to patch the
|
||||
* resulting bDescriptorType value if USB_DT_OTHER_SPEED_CONFIG is needed.
|
||||
*/
|
||||
int usb_gadget_config_buf(
|
||||
const struct usb_config_descriptor *config,
|
||||
void *buf,
|
||||
unsigned length,
|
||||
const struct usb_descriptor_header **desc
|
||||
)
|
||||
{
|
||||
struct usb_config_descriptor *cp = buf;
|
||||
int len;
|
||||
|
||||
/* config descriptor first */
|
||||
if (length < USB_DT_CONFIG_SIZE || !desc)
|
||||
return -EINVAL;
|
||||
*cp = *config;
|
||||
|
||||
/* then interface/endpoint/class/vendor/... */
|
||||
len = usb_descriptor_fillbuf(USB_DT_CONFIG_SIZE + (u8*)buf,
|
||||
length - USB_DT_CONFIG_SIZE, desc);
|
||||
if (len < 0)
|
||||
return len;
|
||||
len += USB_DT_CONFIG_SIZE;
|
||||
if (len > 0xffff)
|
||||
return -EINVAL;
|
||||
|
||||
/* patch up the config descriptor */
|
||||
cp->bLength = USB_DT_CONFIG_SIZE;
|
||||
cp->bDescriptorType = USB_DT_CONFIG;
|
||||
cp->wTotalLength = cpu_to_le16(len);
|
||||
cp->bmAttributes |= USB_CONFIG_ATT_ONE;
|
||||
return len;
|
||||
}
|
||||
|
||||
/**
|
||||
* usb_copy_descriptors - copy a vector of USB descriptors
|
||||
* @src: null-terminated vector to copy
|
||||
* Context: initialization code, which may sleep
|
||||
*
|
||||
* This makes a copy of a vector of USB descriptors. Its primary use
|
||||
* is to support usb_function objects which can have multiple copies,
|
||||
* each needing different descriptors. Functions may have static
|
||||
* tables of descriptors, which are used as templates and customized
|
||||
* with identifiers (for interfaces, strings, endpoints, and more)
|
||||
* as needed by a given function instance.
|
||||
*/
|
||||
struct usb_descriptor_header **
|
||||
usb_copy_descriptors(struct usb_descriptor_header **src)
|
||||
{
|
||||
struct usb_descriptor_header **tmp;
|
||||
unsigned bytes;
|
||||
unsigned n_desc;
|
||||
void *mem;
|
||||
struct usb_descriptor_header **ret;
|
||||
|
||||
/* count descriptors and their sizes; then add vector size */
|
||||
for (bytes = 0, n_desc = 0, tmp = src; *tmp; tmp++, n_desc++)
|
||||
bytes += (*tmp)->bLength;
|
||||
bytes += (n_desc + 1) * sizeof(*tmp);
|
||||
|
||||
mem = kmalloc(bytes, GFP_KERNEL);
|
||||
if (!mem)
|
||||
return NULL;
|
||||
|
||||
/* fill in pointers starting at "tmp",
|
||||
* to descriptors copied starting at "mem";
|
||||
* and return "ret"
|
||||
*/
|
||||
tmp = mem;
|
||||
ret = mem;
|
||||
mem += (n_desc + 1) * sizeof(*tmp);
|
||||
while (*src) {
|
||||
memcpy(mem, *src, (*src)->bLength);
|
||||
*tmp = mem;
|
||||
tmp++;
|
||||
mem += (*src)->bLength;
|
||||
src++;
|
||||
}
|
||||
*tmp = NULL;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
393
drivers/staging/ccg/epautoconf.c
Normal file
393
drivers/staging/ccg/epautoconf.c
Normal file
|
|
@ -0,0 +1,393 @@
|
|||
/*
|
||||
* epautoconf.c -- endpoint autoconfiguration for usb gadget drivers
|
||||
*
|
||||
* Copyright (C) 2004 David Brownell
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/device.h>
|
||||
|
||||
#include <linux/ctype.h>
|
||||
#include <linux/string.h>
|
||||
|
||||
#include <linux/usb/ch9.h>
|
||||
#include <linux/usb/gadget.h>
|
||||
|
||||
#include "gadget_chips.h"
|
||||
|
||||
|
||||
/* we must assign addresses for configurable endpoints (like net2280) */
|
||||
static unsigned epnum;
|
||||
|
||||
// #define MANY_ENDPOINTS
|
||||
#ifdef MANY_ENDPOINTS
|
||||
/* more than 15 configurable endpoints */
|
||||
static unsigned in_epnum;
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
* This should work with endpoints from controller drivers sharing the
|
||||
* same endpoint naming convention. By example:
|
||||
*
|
||||
* - ep1, ep2, ... address is fixed, not direction or type
|
||||
* - ep1in, ep2out, ... address and direction are fixed, not type
|
||||
* - ep1-bulk, ep2-bulk, ... address and type are fixed, not direction
|
||||
* - ep1in-bulk, ep2out-iso, ... all three are fixed
|
||||
* - ep-* ... no functionality restrictions
|
||||
*
|
||||
* Type suffixes are "-bulk", "-iso", or "-int". Numbers are decimal.
|
||||
* Less common restrictions are implied by gadget_is_*().
|
||||
*
|
||||
* NOTE: each endpoint is unidirectional, as specified by its USB
|
||||
* descriptor; and isn't specific to a configuration or altsetting.
|
||||
*/
|
||||
static int
|
||||
ep_matches (
|
||||
struct usb_gadget *gadget,
|
||||
struct usb_ep *ep,
|
||||
struct usb_endpoint_descriptor *desc,
|
||||
struct usb_ss_ep_comp_descriptor *ep_comp
|
||||
)
|
||||
{
|
||||
u8 type;
|
||||
const char *tmp;
|
||||
u16 max;
|
||||
|
||||
int num_req_streams = 0;
|
||||
|
||||
/* endpoint already claimed? */
|
||||
if (NULL != ep->driver_data)
|
||||
return 0;
|
||||
|
||||
/* only support ep0 for portable CONTROL traffic */
|
||||
type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
|
||||
if (USB_ENDPOINT_XFER_CONTROL == type)
|
||||
return 0;
|
||||
|
||||
/* some other naming convention */
|
||||
if ('e' != ep->name[0])
|
||||
return 0;
|
||||
|
||||
/* type-restriction: "-iso", "-bulk", or "-int".
|
||||
* direction-restriction: "in", "out".
|
||||
*/
|
||||
if ('-' != ep->name[2]) {
|
||||
tmp = strrchr (ep->name, '-');
|
||||
if (tmp) {
|
||||
switch (type) {
|
||||
case USB_ENDPOINT_XFER_INT:
|
||||
/* bulk endpoints handle interrupt transfers,
|
||||
* except the toggle-quirky iso-synch kind
|
||||
*/
|
||||
if ('s' == tmp[2]) // == "-iso"
|
||||
return 0;
|
||||
/* for now, avoid PXA "interrupt-in";
|
||||
* it's documented as never using DATA1.
|
||||
*/
|
||||
if (gadget_is_pxa (gadget)
|
||||
&& 'i' == tmp [1])
|
||||
return 0;
|
||||
break;
|
||||
case USB_ENDPOINT_XFER_BULK:
|
||||
if ('b' != tmp[1]) // != "-bulk"
|
||||
return 0;
|
||||
break;
|
||||
case USB_ENDPOINT_XFER_ISOC:
|
||||
if ('s' != tmp[2]) // != "-iso"
|
||||
return 0;
|
||||
}
|
||||
} else {
|
||||
tmp = ep->name + strlen (ep->name);
|
||||
}
|
||||
|
||||
/* direction-restriction: "..in-..", "out-.." */
|
||||
tmp--;
|
||||
if (!isdigit (*tmp)) {
|
||||
if (desc->bEndpointAddress & USB_DIR_IN) {
|
||||
if ('n' != *tmp)
|
||||
return 0;
|
||||
} else {
|
||||
if ('t' != *tmp)
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Get the number of required streams from the EP companion
|
||||
* descriptor and see if the EP matches it
|
||||
*/
|
||||
if (usb_endpoint_xfer_bulk(desc)) {
|
||||
if (ep_comp && gadget->max_speed >= USB_SPEED_SUPER) {
|
||||
num_req_streams = ep_comp->bmAttributes & 0x1f;
|
||||
if (num_req_streams > ep->max_streams)
|
||||
return 0;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
* If the protocol driver hasn't yet decided on wMaxPacketSize
|
||||
* and wants to know the maximum possible, provide the info.
|
||||
*/
|
||||
if (desc->wMaxPacketSize == 0)
|
||||
desc->wMaxPacketSize = cpu_to_le16(ep->maxpacket);
|
||||
|
||||
/* endpoint maxpacket size is an input parameter, except for bulk
|
||||
* where it's an output parameter representing the full speed limit.
|
||||
* the usb spec fixes high speed bulk maxpacket at 512 bytes.
|
||||
*/
|
||||
max = 0x7ff & usb_endpoint_maxp(desc);
|
||||
switch (type) {
|
||||
case USB_ENDPOINT_XFER_INT:
|
||||
/* INT: limit 64 bytes full speed, 1024 high/super speed */
|
||||
if (!gadget_is_dualspeed(gadget) && max > 64)
|
||||
return 0;
|
||||
/* FALLTHROUGH */
|
||||
|
||||
case USB_ENDPOINT_XFER_ISOC:
|
||||
/* ISO: limit 1023 bytes full speed, 1024 high/super speed */
|
||||
if (ep->maxpacket < max)
|
||||
return 0;
|
||||
if (!gadget_is_dualspeed(gadget) && max > 1023)
|
||||
return 0;
|
||||
|
||||
/* BOTH: "high bandwidth" works only at high speed */
|
||||
if ((desc->wMaxPacketSize & cpu_to_le16(3<<11))) {
|
||||
if (!gadget_is_dualspeed(gadget))
|
||||
return 0;
|
||||
/* configure your hardware with enough buffering!! */
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
/* MATCH!! */
|
||||
|
||||
/* report address */
|
||||
desc->bEndpointAddress &= USB_DIR_IN;
|
||||
if (isdigit (ep->name [2])) {
|
||||
u8 num = simple_strtoul (&ep->name [2], NULL, 10);
|
||||
desc->bEndpointAddress |= num;
|
||||
#ifdef MANY_ENDPOINTS
|
||||
} else if (desc->bEndpointAddress & USB_DIR_IN) {
|
||||
if (++in_epnum > 15)
|
||||
return 0;
|
||||
desc->bEndpointAddress = USB_DIR_IN | in_epnum;
|
||||
#endif
|
||||
} else {
|
||||
if (++epnum > 15)
|
||||
return 0;
|
||||
desc->bEndpointAddress |= epnum;
|
||||
}
|
||||
|
||||
/* report (variable) full speed bulk maxpacket */
|
||||
if ((USB_ENDPOINT_XFER_BULK == type) && !ep_comp) {
|
||||
int size = ep->maxpacket;
|
||||
|
||||
/* min() doesn't work on bitfields with gcc-3.5 */
|
||||
if (size > 64)
|
||||
size = 64;
|
||||
desc->wMaxPacketSize = cpu_to_le16(size);
|
||||
}
|
||||
ep->address = desc->bEndpointAddress;
|
||||
return 1;
|
||||
}
|
||||
|
||||
static struct usb_ep *
|
||||
find_ep (struct usb_gadget *gadget, const char *name)
|
||||
{
|
||||
struct usb_ep *ep;
|
||||
|
||||
list_for_each_entry (ep, &gadget->ep_list, ep_list) {
|
||||
if (0 == strcmp (ep->name, name))
|
||||
return ep;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* usb_ep_autoconfig_ss() - choose an endpoint matching the ep
|
||||
* descriptor and ep companion descriptor
|
||||
* @gadget: The device to which the endpoint must belong.
|
||||
* @desc: Endpoint descriptor, with endpoint direction and transfer mode
|
||||
* initialized. For periodic transfers, the maximum packet
|
||||
* size must also be initialized. This is modified on
|
||||
* success.
|
||||
* @ep_comp: Endpoint companion descriptor, with the required
|
||||
* number of streams. Will be modified when the chosen EP
|
||||
* supports a different number of streams.
|
||||
*
|
||||
* This routine replaces the usb_ep_autoconfig when needed
|
||||
* superspeed enhancments. If such enhancemnets are required,
|
||||
* the FD should call usb_ep_autoconfig_ss directly and provide
|
||||
* the additional ep_comp parameter.
|
||||
*
|
||||
* By choosing an endpoint to use with the specified descriptor,
|
||||
* this routine simplifies writing gadget drivers that work with
|
||||
* multiple USB device controllers. The endpoint would be
|
||||
* passed later to usb_ep_enable(), along with some descriptor.
|
||||
*
|
||||
* That second descriptor won't always be the same as the first one.
|
||||
* For example, isochronous endpoints can be autoconfigured for high
|
||||
* bandwidth, and then used in several lower bandwidth altsettings.
|
||||
* Also, high and full speed descriptors will be different.
|
||||
*
|
||||
* Be sure to examine and test the results of autoconfiguration
|
||||
* on your hardware. This code may not make the best choices
|
||||
* about how to use the USB controller, and it can't know all
|
||||
* the restrictions that may apply. Some combinations of driver
|
||||
* and hardware won't be able to autoconfigure.
|
||||
*
|
||||
* On success, this returns an un-claimed usb_ep, and modifies the endpoint
|
||||
* descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value
|
||||
* is initialized as if the endpoint were used at full speed and
|
||||
* the bmAttribute field in the ep companion descriptor is
|
||||
* updated with the assigned number of streams if it is
|
||||
* different from the original value. To prevent the endpoint
|
||||
* from being returned by a later autoconfig call, claim it by
|
||||
* assigning ep->driver_data to some non-null value.
|
||||
*
|
||||
* On failure, this returns a null endpoint descriptor.
|
||||
*/
|
||||
struct usb_ep *usb_ep_autoconfig_ss(
|
||||
struct usb_gadget *gadget,
|
||||
struct usb_endpoint_descriptor *desc,
|
||||
struct usb_ss_ep_comp_descriptor *ep_comp
|
||||
)
|
||||
{
|
||||
struct usb_ep *ep;
|
||||
u8 type;
|
||||
|
||||
type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
|
||||
|
||||
/* First, apply chip-specific "best usage" knowledge.
|
||||
* This might make a good usb_gadget_ops hook ...
|
||||
*/
|
||||
if (gadget_is_net2280 (gadget) && type == USB_ENDPOINT_XFER_INT) {
|
||||
/* ep-e, ep-f are PIO with only 64 byte fifos */
|
||||
ep = find_ep (gadget, "ep-e");
|
||||
if (ep && ep_matches(gadget, ep, desc, ep_comp))
|
||||
goto found_ep;
|
||||
ep = find_ep (gadget, "ep-f");
|
||||
if (ep && ep_matches(gadget, ep, desc, ep_comp))
|
||||
goto found_ep;
|
||||
|
||||
} else if (gadget_is_goku (gadget)) {
|
||||
if (USB_ENDPOINT_XFER_INT == type) {
|
||||
/* single buffering is enough */
|
||||
ep = find_ep(gadget, "ep3-bulk");
|
||||
if (ep && ep_matches(gadget, ep, desc, ep_comp))
|
||||
goto found_ep;
|
||||
} else if (USB_ENDPOINT_XFER_BULK == type
|
||||
&& (USB_DIR_IN & desc->bEndpointAddress)) {
|
||||
/* DMA may be available */
|
||||
ep = find_ep(gadget, "ep2-bulk");
|
||||
if (ep && ep_matches(gadget, ep, desc,
|
||||
ep_comp))
|
||||
goto found_ep;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_BLACKFIN
|
||||
} else if (gadget_is_musbhdrc(gadget)) {
|
||||
if ((USB_ENDPOINT_XFER_BULK == type) ||
|
||||
(USB_ENDPOINT_XFER_ISOC == type)) {
|
||||
if (USB_DIR_IN & desc->bEndpointAddress)
|
||||
ep = find_ep (gadget, "ep5in");
|
||||
else
|
||||
ep = find_ep (gadget, "ep6out");
|
||||
} else if (USB_ENDPOINT_XFER_INT == type) {
|
||||
if (USB_DIR_IN & desc->bEndpointAddress)
|
||||
ep = find_ep(gadget, "ep1in");
|
||||
else
|
||||
ep = find_ep(gadget, "ep2out");
|
||||
} else
|
||||
ep = NULL;
|
||||
if (ep && ep_matches(gadget, ep, desc, ep_comp))
|
||||
goto found_ep;
|
||||
#endif
|
||||
}
|
||||
|
||||
/* Second, look at endpoints until an unclaimed one looks usable */
|
||||
list_for_each_entry (ep, &gadget->ep_list, ep_list) {
|
||||
if (ep_matches(gadget, ep, desc, ep_comp))
|
||||
goto found_ep;
|
||||
}
|
||||
|
||||
/* Fail */
|
||||
return NULL;
|
||||
found_ep:
|
||||
ep->desc = NULL;
|
||||
ep->comp_desc = NULL;
|
||||
return ep;
|
||||
}
|
||||
|
||||
/**
|
||||
* usb_ep_autoconfig() - choose an endpoint matching the
|
||||
* descriptor
|
||||
* @gadget: The device to which the endpoint must belong.
|
||||
* @desc: Endpoint descriptor, with endpoint direction and transfer mode
|
||||
* initialized. For periodic transfers, the maximum packet
|
||||
* size must also be initialized. This is modified on success.
|
||||
*
|
||||
* By choosing an endpoint to use with the specified descriptor, this
|
||||
* routine simplifies writing gadget drivers that work with multiple
|
||||
* USB device controllers. The endpoint would be passed later to
|
||||
* usb_ep_enable(), along with some descriptor.
|
||||
*
|
||||
* That second descriptor won't always be the same as the first one.
|
||||
* For example, isochronous endpoints can be autoconfigured for high
|
||||
* bandwidth, and then used in several lower bandwidth altsettings.
|
||||
* Also, high and full speed descriptors will be different.
|
||||
*
|
||||
* Be sure to examine and test the results of autoconfiguration on your
|
||||
* hardware. This code may not make the best choices about how to use the
|
||||
* USB controller, and it can't know all the restrictions that may apply.
|
||||
* Some combinations of driver and hardware won't be able to autoconfigure.
|
||||
*
|
||||
* On success, this returns an un-claimed usb_ep, and modifies the endpoint
|
||||
* descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value
|
||||
* is initialized as if the endpoint were used at full speed. To prevent
|
||||
* the endpoint from being returned by a later autoconfig call, claim it
|
||||
* by assigning ep->driver_data to some non-null value.
|
||||
*
|
||||
* On failure, this returns a null endpoint descriptor.
|
||||
*/
|
||||
struct usb_ep *usb_ep_autoconfig(
|
||||
struct usb_gadget *gadget,
|
||||
struct usb_endpoint_descriptor *desc
|
||||
)
|
||||
{
|
||||
return usb_ep_autoconfig_ss(gadget, desc, NULL);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* usb_ep_autoconfig_reset - reset endpoint autoconfig state
|
||||
* @gadget: device for which autoconfig state will be reset
|
||||
*
|
||||
* Use this for devices where one configuration may need to assign
|
||||
* endpoint resources very differently from the next one. It clears
|
||||
* state such as ep->driver_data and the record of assigned endpoints
|
||||
* used by usb_ep_autoconfig().
|
||||
*/
|
||||
void usb_ep_autoconfig_reset (struct usb_gadget *gadget)
|
||||
{
|
||||
struct usb_ep *ep;
|
||||
|
||||
list_for_each_entry (ep, &gadget->ep_list, ep_list) {
|
||||
ep->driver_data = NULL;
|
||||
}
|
||||
#ifdef MANY_ENDPOINTS
|
||||
in_epnum = 0;
|
||||
#endif
|
||||
epnum = 0;
|
||||
}
|
||||
|
||||
814
drivers/staging/ccg/f_acm.c
Normal file
814
drivers/staging/ccg/f_acm.c
Normal file
|
|
@ -0,0 +1,814 @@
|
|||
/*
|
||||
* f_acm.c -- USB CDC serial (ACM) function driver
|
||||
*
|
||||
* Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)
|
||||
* Copyright (C) 2008 by David Brownell
|
||||
* Copyright (C) 2008 by Nokia Corporation
|
||||
* Copyright (C) 2009 by Samsung Electronics
|
||||
* Author: Michal Nazarewicz (mina86@mina86.com)
|
||||
*
|
||||
* This software is distributed under the terms of the GNU General
|
||||
* Public License ("GPL") as published by the Free Software Foundation,
|
||||
* either version 2 of that License or (at your option) any later version.
|
||||
*/
|
||||
|
||||
/* #define VERBOSE_DEBUG */
|
||||
|
||||
#include <linux/slab.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/device.h>
|
||||
|
||||
#include "u_serial.h"
|
||||
#include "gadget_chips.h"
|
||||
|
||||
|
||||
/*
|
||||
* This CDC ACM function support just wraps control functions and
|
||||
* notifications around the generic serial-over-usb code.
|
||||
*
|
||||
* Because CDC ACM is standardized by the USB-IF, many host operating
|
||||
* systems have drivers for it. Accordingly, ACM is the preferred
|
||||
* interop solution for serial-port type connections. The control
|
||||
* models are often not necessary, and in any case don't do much in
|
||||
* this bare-bones implementation.
|
||||
*
|
||||
* Note that even MS-Windows has some support for ACM. However, that
|
||||
* support is somewhat broken because when you use ACM in a composite
|
||||
* device, having multiple interfaces confuses the poor OS. It doesn't
|
||||
* seem to understand CDC Union descriptors. The new "association"
|
||||
* descriptors (roughly equivalent to CDC Unions) may sometimes help.
|
||||
*/
|
||||
|
||||
struct f_acm {
|
||||
struct gserial port;
|
||||
u8 ctrl_id, data_id;
|
||||
u8 port_num;
|
||||
|
||||
u8 pending;
|
||||
|
||||
/* lock is mostly for pending and notify_req ... they get accessed
|
||||
* by callbacks both from tty (open/close/break) under its spinlock,
|
||||
* and notify_req.complete() which can't use that lock.
|
||||
*/
|
||||
spinlock_t lock;
|
||||
|
||||
struct usb_ep *notify;
|
||||
struct usb_request *notify_req;
|
||||
|
||||
struct usb_cdc_line_coding port_line_coding; /* 8-N-1 etc */
|
||||
|
||||
/* SetControlLineState request -- CDC 1.1 section 6.2.14 (INPUT) */
|
||||
u16 port_handshake_bits;
|
||||
#define ACM_CTRL_RTS (1 << 1) /* unused with full duplex */
|
||||
#define ACM_CTRL_DTR (1 << 0) /* host is ready for data r/w */
|
||||
|
||||
/* SerialState notification -- CDC 1.1 section 6.3.5 (OUTPUT) */
|
||||
u16 serial_state;
|
||||
#define ACM_CTRL_OVERRUN (1 << 6)
|
||||
#define ACM_CTRL_PARITY (1 << 5)
|
||||
#define ACM_CTRL_FRAMING (1 << 4)
|
||||
#define ACM_CTRL_RI (1 << 3)
|
||||
#define ACM_CTRL_BRK (1 << 2)
|
||||
#define ACM_CTRL_DSR (1 << 1)
|
||||
#define ACM_CTRL_DCD (1 << 0)
|
||||
};
|
||||
|
||||
static inline struct f_acm *func_to_acm(struct usb_function *f)
|
||||
{
|
||||
return container_of(f, struct f_acm, port.func);
|
||||
}
|
||||
|
||||
static inline struct f_acm *port_to_acm(struct gserial *p)
|
||||
{
|
||||
return container_of(p, struct f_acm, port);
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/* notification endpoint uses smallish and infrequent fixed-size messages */
|
||||
|
||||
#define GS_LOG2_NOTIFY_INTERVAL 5 /* 1 << 5 == 32 msec */
|
||||
#define GS_NOTIFY_MAXPACKET 10 /* notification + 2 bytes */
|
||||
|
||||
/* interface and class descriptors: */
|
||||
|
||||
static struct usb_interface_assoc_descriptor
|
||||
acm_iad_descriptor = {
|
||||
.bLength = sizeof acm_iad_descriptor,
|
||||
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
|
||||
|
||||
/* .bFirstInterface = DYNAMIC, */
|
||||
.bInterfaceCount = 2, // control + data
|
||||
.bFunctionClass = USB_CLASS_COMM,
|
||||
.bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
|
||||
.bFunctionProtocol = USB_CDC_ACM_PROTO_AT_V25TER,
|
||||
/* .iFunction = DYNAMIC */
|
||||
};
|
||||
|
||||
|
||||
static struct usb_interface_descriptor acm_control_interface_desc = {
|
||||
.bLength = USB_DT_INTERFACE_SIZE,
|
||||
.bDescriptorType = USB_DT_INTERFACE,
|
||||
/* .bInterfaceNumber = DYNAMIC */
|
||||
.bNumEndpoints = 1,
|
||||
.bInterfaceClass = USB_CLASS_COMM,
|
||||
.bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
|
||||
.bInterfaceProtocol = USB_CDC_ACM_PROTO_AT_V25TER,
|
||||
/* .iInterface = DYNAMIC */
|
||||
};
|
||||
|
||||
static struct usb_interface_descriptor acm_data_interface_desc = {
|
||||
.bLength = USB_DT_INTERFACE_SIZE,
|
||||
.bDescriptorType = USB_DT_INTERFACE,
|
||||
/* .bInterfaceNumber = DYNAMIC */
|
||||
.bNumEndpoints = 2,
|
||||
.bInterfaceClass = USB_CLASS_CDC_DATA,
|
||||
.bInterfaceSubClass = 0,
|
||||
.bInterfaceProtocol = 0,
|
||||
/* .iInterface = DYNAMIC */
|
||||
};
|
||||
|
||||
static struct usb_cdc_header_desc acm_header_desc = {
|
||||
.bLength = sizeof(acm_header_desc),
|
||||
.bDescriptorType = USB_DT_CS_INTERFACE,
|
||||
.bDescriptorSubType = USB_CDC_HEADER_TYPE,
|
||||
.bcdCDC = cpu_to_le16(0x0110),
|
||||
};
|
||||
|
||||
static struct usb_cdc_call_mgmt_descriptor
|
||||
acm_call_mgmt_descriptor = {
|
||||
.bLength = sizeof(acm_call_mgmt_descriptor),
|
||||
.bDescriptorType = USB_DT_CS_INTERFACE,
|
||||
.bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
|
||||
.bmCapabilities = 0,
|
||||
/* .bDataInterface = DYNAMIC */
|
||||
};
|
||||
|
||||
static struct usb_cdc_acm_descriptor acm_descriptor = {
|
||||
.bLength = sizeof(acm_descriptor),
|
||||
.bDescriptorType = USB_DT_CS_INTERFACE,
|
||||
.bDescriptorSubType = USB_CDC_ACM_TYPE,
|
||||
.bmCapabilities = USB_CDC_CAP_LINE,
|
||||
};
|
||||
|
||||
static struct usb_cdc_union_desc acm_union_desc = {
|
||||
.bLength = sizeof(acm_union_desc),
|
||||
.bDescriptorType = USB_DT_CS_INTERFACE,
|
||||
.bDescriptorSubType = USB_CDC_UNION_TYPE,
|
||||
/* .bMasterInterface0 = DYNAMIC */
|
||||
/* .bSlaveInterface0 = DYNAMIC */
|
||||
};
|
||||
|
||||
/* full speed support: */
|
||||
|
||||
static struct usb_endpoint_descriptor acm_fs_notify_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
.bEndpointAddress = USB_DIR_IN,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_INT,
|
||||
.wMaxPacketSize = cpu_to_le16(GS_NOTIFY_MAXPACKET),
|
||||
.bInterval = 1 << GS_LOG2_NOTIFY_INTERVAL,
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor acm_fs_in_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
.bEndpointAddress = USB_DIR_IN,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor acm_fs_out_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
.bEndpointAddress = USB_DIR_OUT,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
};
|
||||
|
||||
static struct usb_descriptor_header *acm_fs_function[] = {
|
||||
(struct usb_descriptor_header *) &acm_iad_descriptor,
|
||||
(struct usb_descriptor_header *) &acm_control_interface_desc,
|
||||
(struct usb_descriptor_header *) &acm_header_desc,
|
||||
(struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
|
||||
(struct usb_descriptor_header *) &acm_descriptor,
|
||||
(struct usb_descriptor_header *) &acm_union_desc,
|
||||
(struct usb_descriptor_header *) &acm_fs_notify_desc,
|
||||
(struct usb_descriptor_header *) &acm_data_interface_desc,
|
||||
(struct usb_descriptor_header *) &acm_fs_in_desc,
|
||||
(struct usb_descriptor_header *) &acm_fs_out_desc,
|
||||
NULL,
|
||||
};
|
||||
|
||||
/* high speed support: */
|
||||
|
||||
static struct usb_endpoint_descriptor acm_hs_notify_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
.bEndpointAddress = USB_DIR_IN,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_INT,
|
||||
.wMaxPacketSize = cpu_to_le16(GS_NOTIFY_MAXPACKET),
|
||||
.bInterval = GS_LOG2_NOTIFY_INTERVAL+4,
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor acm_hs_in_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
.wMaxPacketSize = cpu_to_le16(512),
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor acm_hs_out_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
.wMaxPacketSize = cpu_to_le16(512),
|
||||
};
|
||||
|
||||
static struct usb_descriptor_header *acm_hs_function[] = {
|
||||
(struct usb_descriptor_header *) &acm_iad_descriptor,
|
||||
(struct usb_descriptor_header *) &acm_control_interface_desc,
|
||||
(struct usb_descriptor_header *) &acm_header_desc,
|
||||
(struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
|
||||
(struct usb_descriptor_header *) &acm_descriptor,
|
||||
(struct usb_descriptor_header *) &acm_union_desc,
|
||||
(struct usb_descriptor_header *) &acm_hs_notify_desc,
|
||||
(struct usb_descriptor_header *) &acm_data_interface_desc,
|
||||
(struct usb_descriptor_header *) &acm_hs_in_desc,
|
||||
(struct usb_descriptor_header *) &acm_hs_out_desc,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor acm_ss_in_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
.wMaxPacketSize = cpu_to_le16(1024),
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor acm_ss_out_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
.wMaxPacketSize = cpu_to_le16(1024),
|
||||
};
|
||||
|
||||
static struct usb_ss_ep_comp_descriptor acm_ss_bulk_comp_desc = {
|
||||
.bLength = sizeof acm_ss_bulk_comp_desc,
|
||||
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
|
||||
};
|
||||
|
||||
static struct usb_descriptor_header *acm_ss_function[] = {
|
||||
(struct usb_descriptor_header *) &acm_iad_descriptor,
|
||||
(struct usb_descriptor_header *) &acm_control_interface_desc,
|
||||
(struct usb_descriptor_header *) &acm_header_desc,
|
||||
(struct usb_descriptor_header *) &acm_call_mgmt_descriptor,
|
||||
(struct usb_descriptor_header *) &acm_descriptor,
|
||||
(struct usb_descriptor_header *) &acm_union_desc,
|
||||
(struct usb_descriptor_header *) &acm_hs_notify_desc,
|
||||
(struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
|
||||
(struct usb_descriptor_header *) &acm_data_interface_desc,
|
||||
(struct usb_descriptor_header *) &acm_ss_in_desc,
|
||||
(struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
|
||||
(struct usb_descriptor_header *) &acm_ss_out_desc,
|
||||
(struct usb_descriptor_header *) &acm_ss_bulk_comp_desc,
|
||||
NULL,
|
||||
};
|
||||
|
||||
/* string descriptors: */
|
||||
|
||||
#define ACM_CTRL_IDX 0
|
||||
#define ACM_DATA_IDX 1
|
||||
#define ACM_IAD_IDX 2
|
||||
|
||||
/* static strings, in UTF-8 */
|
||||
static struct usb_string acm_string_defs[] = {
|
||||
[ACM_CTRL_IDX].s = "CDC Abstract Control Model (ACM)",
|
||||
[ACM_DATA_IDX].s = "CDC ACM Data",
|
||||
[ACM_IAD_IDX ].s = "CDC Serial",
|
||||
{ /* ZEROES END LIST */ },
|
||||
};
|
||||
|
||||
static struct usb_gadget_strings acm_string_table = {
|
||||
.language = 0x0409, /* en-us */
|
||||
.strings = acm_string_defs,
|
||||
};
|
||||
|
||||
static struct usb_gadget_strings *acm_strings[] = {
|
||||
&acm_string_table,
|
||||
NULL,
|
||||
};
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/* ACM control ... data handling is delegated to tty library code.
|
||||
* The main task of this function is to activate and deactivate
|
||||
* that code based on device state; track parameters like line
|
||||
* speed, handshake state, and so on; and issue notifications.
|
||||
*/
|
||||
|
||||
static void acm_complete_set_line_coding(struct usb_ep *ep,
|
||||
struct usb_request *req)
|
||||
{
|
||||
struct f_acm *acm = ep->driver_data;
|
||||
struct usb_composite_dev *cdev = acm->port.func.config->cdev;
|
||||
|
||||
if (req->status != 0) {
|
||||
DBG(cdev, "acm ttyGS%d completion, err %d\n",
|
||||
acm->port_num, req->status);
|
||||
return;
|
||||
}
|
||||
|
||||
/* normal completion */
|
||||
if (req->actual != sizeof(acm->port_line_coding)) {
|
||||
DBG(cdev, "acm ttyGS%d short resp, len %d\n",
|
||||
acm->port_num, req->actual);
|
||||
usb_ep_set_halt(ep);
|
||||
} else {
|
||||
struct usb_cdc_line_coding *value = req->buf;
|
||||
|
||||
/* REVISIT: we currently just remember this data.
|
||||
* If we change that, (a) validate it first, then
|
||||
* (b) update whatever hardware needs updating,
|
||||
* (c) worry about locking. This is information on
|
||||
* the order of 9600-8-N-1 ... most of which means
|
||||
* nothing unless we control a real RS232 line.
|
||||
*/
|
||||
acm->port_line_coding = *value;
|
||||
}
|
||||
}
|
||||
|
||||
static int acm_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
|
||||
{
|
||||
struct f_acm *acm = func_to_acm(f);
|
||||
struct usb_composite_dev *cdev = f->config->cdev;
|
||||
struct usb_request *req = cdev->req;
|
||||
int value = -EOPNOTSUPP;
|
||||
u16 w_index = le16_to_cpu(ctrl->wIndex);
|
||||
u16 w_value = le16_to_cpu(ctrl->wValue);
|
||||
u16 w_length = le16_to_cpu(ctrl->wLength);
|
||||
|
||||
/* composite driver infrastructure handles everything except
|
||||
* CDC class messages; interface activation uses set_alt().
|
||||
*
|
||||
* Note CDC spec table 4 lists the ACM request profile. It requires
|
||||
* encapsulated command support ... we don't handle any, and respond
|
||||
* to them by stalling. Options include get/set/clear comm features
|
||||
* (not that useful) and SEND_BREAK.
|
||||
*/
|
||||
switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
|
||||
|
||||
/* SET_LINE_CODING ... just read and save what the host sends */
|
||||
case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
||||
| USB_CDC_REQ_SET_LINE_CODING:
|
||||
if (w_length != sizeof(struct usb_cdc_line_coding)
|
||||
|| w_index != acm->ctrl_id)
|
||||
goto invalid;
|
||||
|
||||
value = w_length;
|
||||
cdev->gadget->ep0->driver_data = acm;
|
||||
req->complete = acm_complete_set_line_coding;
|
||||
break;
|
||||
|
||||
/* GET_LINE_CODING ... return what host sent, or initial value */
|
||||
case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
||||
| USB_CDC_REQ_GET_LINE_CODING:
|
||||
if (w_index != acm->ctrl_id)
|
||||
goto invalid;
|
||||
|
||||
value = min_t(unsigned, w_length,
|
||||
sizeof(struct usb_cdc_line_coding));
|
||||
memcpy(req->buf, &acm->port_line_coding, value);
|
||||
break;
|
||||
|
||||
/* SET_CONTROL_LINE_STATE ... save what the host sent */
|
||||
case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
||||
| USB_CDC_REQ_SET_CONTROL_LINE_STATE:
|
||||
if (w_index != acm->ctrl_id)
|
||||
goto invalid;
|
||||
|
||||
value = 0;
|
||||
|
||||
/* FIXME we should not allow data to flow until the
|
||||
* host sets the ACM_CTRL_DTR bit; and when it clears
|
||||
* that bit, we should return to that no-flow state.
|
||||
*/
|
||||
acm->port_handshake_bits = w_value;
|
||||
break;
|
||||
|
||||
default:
|
||||
invalid:
|
||||
VDBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
|
||||
ctrl->bRequestType, ctrl->bRequest,
|
||||
w_value, w_index, w_length);
|
||||
}
|
||||
|
||||
/* respond with data transfer or status phase? */
|
||||
if (value >= 0) {
|
||||
DBG(cdev, "acm ttyGS%d req%02x.%02x v%04x i%04x l%d\n",
|
||||
acm->port_num, ctrl->bRequestType, ctrl->bRequest,
|
||||
w_value, w_index, w_length);
|
||||
req->zero = 0;
|
||||
req->length = value;
|
||||
value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
|
||||
if (value < 0)
|
||||
ERROR(cdev, "acm response on ttyGS%d, err %d\n",
|
||||
acm->port_num, value);
|
||||
}
|
||||
|
||||
/* device either stalls (value < 0) or reports success */
|
||||
return value;
|
||||
}
|
||||
|
||||
static int acm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
|
||||
{
|
||||
struct f_acm *acm = func_to_acm(f);
|
||||
struct usb_composite_dev *cdev = f->config->cdev;
|
||||
|
||||
/* we know alt == 0, so this is an activation or a reset */
|
||||
|
||||
if (intf == acm->ctrl_id) {
|
||||
if (acm->notify->driver_data) {
|
||||
VDBG(cdev, "reset acm control interface %d\n", intf);
|
||||
usb_ep_disable(acm->notify);
|
||||
} else {
|
||||
VDBG(cdev, "init acm ctrl interface %d\n", intf);
|
||||
if (config_ep_by_speed(cdev->gadget, f, acm->notify))
|
||||
return -EINVAL;
|
||||
}
|
||||
usb_ep_enable(acm->notify);
|
||||
acm->notify->driver_data = acm;
|
||||
|
||||
} else if (intf == acm->data_id) {
|
||||
if (acm->port.in->driver_data) {
|
||||
DBG(cdev, "reset acm ttyGS%d\n", acm->port_num);
|
||||
gserial_disconnect(&acm->port);
|
||||
}
|
||||
if (!acm->port.in->desc || !acm->port.out->desc) {
|
||||
DBG(cdev, "activate acm ttyGS%d\n", acm->port_num);
|
||||
if (config_ep_by_speed(cdev->gadget, f,
|
||||
acm->port.in) ||
|
||||
config_ep_by_speed(cdev->gadget, f,
|
||||
acm->port.out)) {
|
||||
acm->port.in->desc = NULL;
|
||||
acm->port.out->desc = NULL;
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
gserial_connect(&acm->port, acm->port_num);
|
||||
|
||||
} else
|
||||
return -EINVAL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void acm_disable(struct usb_function *f)
|
||||
{
|
||||
struct f_acm *acm = func_to_acm(f);
|
||||
struct usb_composite_dev *cdev = f->config->cdev;
|
||||
|
||||
DBG(cdev, "acm ttyGS%d deactivated\n", acm->port_num);
|
||||
gserial_disconnect(&acm->port);
|
||||
usb_ep_disable(acm->notify);
|
||||
acm->notify->driver_data = NULL;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/**
|
||||
* acm_cdc_notify - issue CDC notification to host
|
||||
* @acm: wraps host to be notified
|
||||
* @type: notification type
|
||||
* @value: Refer to cdc specs, wValue field.
|
||||
* @data: data to be sent
|
||||
* @length: size of data
|
||||
* Context: irqs blocked, acm->lock held, acm_notify_req non-null
|
||||
*
|
||||
* Returns zero on success or a negative errno.
|
||||
*
|
||||
* See section 6.3.5 of the CDC 1.1 specification for information
|
||||
* about the only notification we issue: SerialState change.
|
||||
*/
|
||||
static int acm_cdc_notify(struct f_acm *acm, u8 type, u16 value,
|
||||
void *data, unsigned length)
|
||||
{
|
||||
struct usb_ep *ep = acm->notify;
|
||||
struct usb_request *req;
|
||||
struct usb_cdc_notification *notify;
|
||||
const unsigned len = sizeof(*notify) + length;
|
||||
void *buf;
|
||||
int status;
|
||||
|
||||
req = acm->notify_req;
|
||||
acm->notify_req = NULL;
|
||||
acm->pending = false;
|
||||
|
||||
req->length = len;
|
||||
notify = req->buf;
|
||||
buf = notify + 1;
|
||||
|
||||
notify->bmRequestType = USB_DIR_IN | USB_TYPE_CLASS
|
||||
| USB_RECIP_INTERFACE;
|
||||
notify->bNotificationType = type;
|
||||
notify->wValue = cpu_to_le16(value);
|
||||
notify->wIndex = cpu_to_le16(acm->ctrl_id);
|
||||
notify->wLength = cpu_to_le16(length);
|
||||
memcpy(buf, data, length);
|
||||
|
||||
/* ep_queue() can complete immediately if it fills the fifo... */
|
||||
spin_unlock(&acm->lock);
|
||||
status = usb_ep_queue(ep, req, GFP_ATOMIC);
|
||||
spin_lock(&acm->lock);
|
||||
|
||||
if (status < 0) {
|
||||
ERROR(acm->port.func.config->cdev,
|
||||
"acm ttyGS%d can't notify serial state, %d\n",
|
||||
acm->port_num, status);
|
||||
acm->notify_req = req;
|
||||
}
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
static int acm_notify_serial_state(struct f_acm *acm)
|
||||
{
|
||||
struct usb_composite_dev *cdev = acm->port.func.config->cdev;
|
||||
int status;
|
||||
|
||||
spin_lock(&acm->lock);
|
||||
if (acm->notify_req) {
|
||||
DBG(cdev, "acm ttyGS%d serial state %04x\n",
|
||||
acm->port_num, acm->serial_state);
|
||||
status = acm_cdc_notify(acm, USB_CDC_NOTIFY_SERIAL_STATE,
|
||||
0, &acm->serial_state, sizeof(acm->serial_state));
|
||||
} else {
|
||||
acm->pending = true;
|
||||
status = 0;
|
||||
}
|
||||
spin_unlock(&acm->lock);
|
||||
return status;
|
||||
}
|
||||
|
||||
static void acm_cdc_notify_complete(struct usb_ep *ep, struct usb_request *req)
|
||||
{
|
||||
struct f_acm *acm = req->context;
|
||||
u8 doit = false;
|
||||
|
||||
/* on this call path we do NOT hold the port spinlock,
|
||||
* which is why ACM needs its own spinlock
|
||||
*/
|
||||
spin_lock(&acm->lock);
|
||||
if (req->status != -ESHUTDOWN)
|
||||
doit = acm->pending;
|
||||
acm->notify_req = req;
|
||||
spin_unlock(&acm->lock);
|
||||
|
||||
if (doit)
|
||||
acm_notify_serial_state(acm);
|
||||
}
|
||||
|
||||
/* connect == the TTY link is open */
|
||||
|
||||
static void acm_connect(struct gserial *port)
|
||||
{
|
||||
struct f_acm *acm = port_to_acm(port);
|
||||
|
||||
acm->serial_state |= ACM_CTRL_DSR | ACM_CTRL_DCD;
|
||||
acm_notify_serial_state(acm);
|
||||
}
|
||||
|
||||
static void acm_disconnect(struct gserial *port)
|
||||
{
|
||||
struct f_acm *acm = port_to_acm(port);
|
||||
|
||||
acm->serial_state &= ~(ACM_CTRL_DSR | ACM_CTRL_DCD);
|
||||
acm_notify_serial_state(acm);
|
||||
}
|
||||
|
||||
static int acm_send_break(struct gserial *port, int duration)
|
||||
{
|
||||
struct f_acm *acm = port_to_acm(port);
|
||||
u16 state;
|
||||
|
||||
state = acm->serial_state;
|
||||
state &= ~ACM_CTRL_BRK;
|
||||
if (duration)
|
||||
state |= ACM_CTRL_BRK;
|
||||
|
||||
acm->serial_state = state;
|
||||
return acm_notify_serial_state(acm);
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/* ACM function driver setup/binding */
|
||||
static int
|
||||
acm_bind(struct usb_configuration *c, struct usb_function *f)
|
||||
{
|
||||
struct usb_composite_dev *cdev = c->cdev;
|
||||
struct f_acm *acm = func_to_acm(f);
|
||||
int status;
|
||||
struct usb_ep *ep;
|
||||
|
||||
/* allocate instance-specific interface IDs, and patch descriptors */
|
||||
status = usb_interface_id(c, f);
|
||||
if (status < 0)
|
||||
goto fail;
|
||||
acm->ctrl_id = status;
|
||||
acm_iad_descriptor.bFirstInterface = status;
|
||||
|
||||
acm_control_interface_desc.bInterfaceNumber = status;
|
||||
acm_union_desc .bMasterInterface0 = status;
|
||||
|
||||
status = usb_interface_id(c, f);
|
||||
if (status < 0)
|
||||
goto fail;
|
||||
acm->data_id = status;
|
||||
|
||||
acm_data_interface_desc.bInterfaceNumber = status;
|
||||
acm_union_desc.bSlaveInterface0 = status;
|
||||
acm_call_mgmt_descriptor.bDataInterface = status;
|
||||
|
||||
status = -ENODEV;
|
||||
|
||||
/* allocate instance-specific endpoints */
|
||||
ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_in_desc);
|
||||
if (!ep)
|
||||
goto fail;
|
||||
acm->port.in = ep;
|
||||
ep->driver_data = cdev; /* claim */
|
||||
|
||||
ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_out_desc);
|
||||
if (!ep)
|
||||
goto fail;
|
||||
acm->port.out = ep;
|
||||
ep->driver_data = cdev; /* claim */
|
||||
|
||||
ep = usb_ep_autoconfig(cdev->gadget, &acm_fs_notify_desc);
|
||||
if (!ep)
|
||||
goto fail;
|
||||
acm->notify = ep;
|
||||
ep->driver_data = cdev; /* claim */
|
||||
|
||||
/* allocate notification */
|
||||
acm->notify_req = gs_alloc_req(ep,
|
||||
sizeof(struct usb_cdc_notification) + 2,
|
||||
GFP_KERNEL);
|
||||
if (!acm->notify_req)
|
||||
goto fail;
|
||||
|
||||
acm->notify_req->complete = acm_cdc_notify_complete;
|
||||
acm->notify_req->context = acm;
|
||||
|
||||
/* copy descriptors */
|
||||
f->descriptors = usb_copy_descriptors(acm_fs_function);
|
||||
if (!f->descriptors)
|
||||
goto fail;
|
||||
|
||||
/* support all relevant hardware speeds... we expect that when
|
||||
* hardware is dual speed, all bulk-capable endpoints work at
|
||||
* both speeds
|
||||
*/
|
||||
if (gadget_is_dualspeed(c->cdev->gadget)) {
|
||||
acm_hs_in_desc.bEndpointAddress =
|
||||
acm_fs_in_desc.bEndpointAddress;
|
||||
acm_hs_out_desc.bEndpointAddress =
|
||||
acm_fs_out_desc.bEndpointAddress;
|
||||
acm_hs_notify_desc.bEndpointAddress =
|
||||
acm_fs_notify_desc.bEndpointAddress;
|
||||
|
||||
/* copy descriptors */
|
||||
f->hs_descriptors = usb_copy_descriptors(acm_hs_function);
|
||||
}
|
||||
if (gadget_is_superspeed(c->cdev->gadget)) {
|
||||
acm_ss_in_desc.bEndpointAddress =
|
||||
acm_fs_in_desc.bEndpointAddress;
|
||||
acm_ss_out_desc.bEndpointAddress =
|
||||
acm_fs_out_desc.bEndpointAddress;
|
||||
|
||||
/* copy descriptors, and track endpoint copies */
|
||||
f->ss_descriptors = usb_copy_descriptors(acm_ss_function);
|
||||
if (!f->ss_descriptors)
|
||||
goto fail;
|
||||
}
|
||||
|
||||
DBG(cdev, "acm ttyGS%d: %s speed IN/%s OUT/%s NOTIFY/%s\n",
|
||||
acm->port_num,
|
||||
gadget_is_superspeed(c->cdev->gadget) ? "super" :
|
||||
gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
|
||||
acm->port.in->name, acm->port.out->name,
|
||||
acm->notify->name);
|
||||
return 0;
|
||||
|
||||
fail:
|
||||
if (acm->notify_req)
|
||||
gs_free_req(acm->notify, acm->notify_req);
|
||||
|
||||
/* we might as well release our claims on endpoints */
|
||||
if (acm->notify)
|
||||
acm->notify->driver_data = NULL;
|
||||
if (acm->port.out)
|
||||
acm->port.out->driver_data = NULL;
|
||||
if (acm->port.in)
|
||||
acm->port.in->driver_data = NULL;
|
||||
|
||||
ERROR(cdev, "%s/%p: can't bind, err %d\n", f->name, f, status);
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
static void
|
||||
acm_unbind(struct usb_configuration *c, struct usb_function *f)
|
||||
{
|
||||
struct f_acm *acm = func_to_acm(f);
|
||||
|
||||
if (gadget_is_dualspeed(c->cdev->gadget))
|
||||
usb_free_descriptors(f->hs_descriptors);
|
||||
if (gadget_is_superspeed(c->cdev->gadget))
|
||||
usb_free_descriptors(f->ss_descriptors);
|
||||
usb_free_descriptors(f->descriptors);
|
||||
gs_free_req(acm->notify, acm->notify_req);
|
||||
kfree(acm);
|
||||
}
|
||||
|
||||
/* Some controllers can't support CDC ACM ... */
|
||||
static inline bool can_support_cdc(struct usb_configuration *c)
|
||||
{
|
||||
/* everything else is *probably* fine ... */
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* acm_bind_config - add a CDC ACM function to a configuration
|
||||
* @c: the configuration to support the CDC ACM instance
|
||||
* @port_num: /dev/ttyGS* port this interface will use
|
||||
* Context: single threaded during gadget setup
|
||||
*
|
||||
* Returns zero on success, else negative errno.
|
||||
*
|
||||
* Caller must have called @gserial_setup() with enough ports to
|
||||
* handle all the ones it binds. Caller is also responsible
|
||||
* for calling @gserial_cleanup() before module unload.
|
||||
*/
|
||||
int acm_bind_config(struct usb_configuration *c, u8 port_num)
|
||||
{
|
||||
struct f_acm *acm;
|
||||
int status;
|
||||
|
||||
if (!can_support_cdc(c))
|
||||
return -EINVAL;
|
||||
|
||||
/* REVISIT might want instance-specific strings to help
|
||||
* distinguish instances ...
|
||||
*/
|
||||
|
||||
/* maybe allocate device-global string IDs, and patch descriptors */
|
||||
if (acm_string_defs[ACM_CTRL_IDX].id == 0) {
|
||||
status = usb_string_id(c->cdev);
|
||||
if (status < 0)
|
||||
return status;
|
||||
acm_string_defs[ACM_CTRL_IDX].id = status;
|
||||
|
||||
acm_control_interface_desc.iInterface = status;
|
||||
|
||||
status = usb_string_id(c->cdev);
|
||||
if (status < 0)
|
||||
return status;
|
||||
acm_string_defs[ACM_DATA_IDX].id = status;
|
||||
|
||||
acm_data_interface_desc.iInterface = status;
|
||||
|
||||
status = usb_string_id(c->cdev);
|
||||
if (status < 0)
|
||||
return status;
|
||||
acm_string_defs[ACM_IAD_IDX].id = status;
|
||||
|
||||
acm_iad_descriptor.iFunction = status;
|
||||
}
|
||||
|
||||
/* allocate and initialize one new instance */
|
||||
acm = kzalloc(sizeof *acm, GFP_KERNEL);
|
||||
if (!acm)
|
||||
return -ENOMEM;
|
||||
|
||||
spin_lock_init(&acm->lock);
|
||||
|
||||
acm->port_num = port_num;
|
||||
|
||||
acm->port.connect = acm_connect;
|
||||
acm->port.disconnect = acm_disconnect;
|
||||
acm->port.send_break = acm_send_break;
|
||||
|
||||
acm->port.func.name = "acm";
|
||||
acm->port.func.strings = acm_strings;
|
||||
/* descriptors are per-instance copies */
|
||||
acm->port.func.bind = acm_bind;
|
||||
acm->port.func.unbind = acm_unbind;
|
||||
acm->port.func.set_alt = acm_set_alt;
|
||||
acm->port.func.setup = acm_setup;
|
||||
acm->port.func.disable = acm_disable;
|
||||
|
||||
status = usb_add_function(c, &acm->port.func);
|
||||
if (status)
|
||||
kfree(acm);
|
||||
return status;
|
||||
}
|
||||
2455
drivers/staging/ccg/f_fs.c
Normal file
2455
drivers/staging/ccg/f_fs.c
Normal file
File diff suppressed because it is too large
Load Diff
3135
drivers/staging/ccg/f_mass_storage.c
Normal file
3135
drivers/staging/ccg/f_mass_storage.c
Normal file
File diff suppressed because it is too large
Load Diff
918
drivers/staging/ccg/f_rndis.c
Normal file
918
drivers/staging/ccg/f_rndis.c
Normal file
|
|
@ -0,0 +1,918 @@
|
|||
/*
|
||||
* f_rndis.c -- RNDIS link function driver
|
||||
*
|
||||
* Copyright (C) 2003-2005,2008 David Brownell
|
||||
* Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
|
||||
* Copyright (C) 2008 Nokia Corporation
|
||||
* Copyright (C) 2009 Samsung Electronics
|
||||
* Author: Michal Nazarewicz (mina86@mina86.com)
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*/
|
||||
|
||||
/* #define VERBOSE_DEBUG */
|
||||
|
||||
#include <linux/slab.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/etherdevice.h>
|
||||
|
||||
#include <linux/atomic.h>
|
||||
|
||||
#include "u_ether.h"
|
||||
#include "rndis.h"
|
||||
|
||||
|
||||
/*
|
||||
* This function is an RNDIS Ethernet port -- a Microsoft protocol that's
|
||||
* been promoted instead of the standard CDC Ethernet. The published RNDIS
|
||||
* spec is ambiguous, incomplete, and needlessly complex. Variants such as
|
||||
* ActiveSync have even worse status in terms of specification.
|
||||
*
|
||||
* In short: it's a protocol controlled by (and for) Microsoft, not for an
|
||||
* Open ecosystem or markets. Linux supports it *only* because Microsoft
|
||||
* doesn't support the CDC Ethernet standard.
|
||||
*
|
||||
* The RNDIS data transfer model is complex, with multiple Ethernet packets
|
||||
* per USB message, and out of band data. The control model is built around
|
||||
* what's essentially an "RNDIS RPC" protocol. It's all wrapped in a CDC ACM
|
||||
* (modem, not Ethernet) veneer, with those ACM descriptors being entirely
|
||||
* useless (they're ignored). RNDIS expects to be the only function in its
|
||||
* configuration, so it's no real help if you need composite devices; and
|
||||
* it expects to be the first configuration too.
|
||||
*
|
||||
* There is a single technical advantage of RNDIS over CDC Ethernet, if you
|
||||
* discount the fluff that its RPC can be made to deliver: it doesn't need
|
||||
* a NOP altsetting for the data interface. That lets it work on some of the
|
||||
* "so smart it's stupid" hardware which takes over configuration changes
|
||||
* from the software, and adds restrictions like "no altsettings".
|
||||
*
|
||||
* Unfortunately MSFT's RNDIS drivers are buggy. They hang or oops, and
|
||||
* have all sorts of contrary-to-specification oddities that can prevent
|
||||
* them from working sanely. Since bugfixes (or accurate specs, letting
|
||||
* Linux work around those bugs) are unlikely to ever come from MSFT, you
|
||||
* may want to avoid using RNDIS on purely operational grounds.
|
||||
*
|
||||
* Omissions from the RNDIS 1.0 specification include:
|
||||
*
|
||||
* - Power management ... references data that's scattered around lots
|
||||
* of other documentation, which is incorrect/incomplete there too.
|
||||
*
|
||||
* - There are various undocumented protocol requirements, like the need
|
||||
* to send garbage in some control-OUT messages.
|
||||
*
|
||||
* - MS-Windows drivers sometimes emit undocumented requests.
|
||||
*/
|
||||
|
||||
struct f_rndis {
|
||||
struct gether port;
|
||||
u8 ctrl_id, data_id;
|
||||
u8 ethaddr[ETH_ALEN];
|
||||
u32 vendorID;
|
||||
const char *manufacturer;
|
||||
int config;
|
||||
|
||||
struct usb_ep *notify;
|
||||
struct usb_request *notify_req;
|
||||
atomic_t notify_count;
|
||||
};
|
||||
|
||||
static inline struct f_rndis *func_to_rndis(struct usb_function *f)
|
||||
{
|
||||
return container_of(f, struct f_rndis, port.func);
|
||||
}
|
||||
|
||||
/* peak (theoretical) bulk transfer rate in bits-per-second */
|
||||
static unsigned int bitrate(struct usb_gadget *g)
|
||||
{
|
||||
if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
|
||||
return 13 * 1024 * 8 * 1000 * 8;
|
||||
else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
|
||||
return 13 * 512 * 8 * 1000 * 8;
|
||||
else
|
||||
return 19 * 64 * 1 * 1000 * 8;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
*/
|
||||
|
||||
#define LOG2_STATUS_INTERVAL_MSEC 5 /* 1 << 5 == 32 msec */
|
||||
#define STATUS_BYTECOUNT 8 /* 8 bytes data */
|
||||
|
||||
|
||||
/* interface descriptor: */
|
||||
|
||||
static struct usb_interface_descriptor rndis_control_intf = {
|
||||
.bLength = sizeof rndis_control_intf,
|
||||
.bDescriptorType = USB_DT_INTERFACE,
|
||||
|
||||
/* .bInterfaceNumber = DYNAMIC */
|
||||
/* status endpoint is optional; this could be patched later */
|
||||
.bNumEndpoints = 1,
|
||||
.bInterfaceClass = USB_CLASS_COMM,
|
||||
.bInterfaceSubClass = USB_CDC_SUBCLASS_ACM,
|
||||
.bInterfaceProtocol = USB_CDC_ACM_PROTO_VENDOR,
|
||||
/* .iInterface = DYNAMIC */
|
||||
};
|
||||
|
||||
static struct usb_cdc_header_desc header_desc = {
|
||||
.bLength = sizeof header_desc,
|
||||
.bDescriptorType = USB_DT_CS_INTERFACE,
|
||||
.bDescriptorSubType = USB_CDC_HEADER_TYPE,
|
||||
|
||||
.bcdCDC = cpu_to_le16(0x0110),
|
||||
};
|
||||
|
||||
static struct usb_cdc_call_mgmt_descriptor call_mgmt_descriptor = {
|
||||
.bLength = sizeof call_mgmt_descriptor,
|
||||
.bDescriptorType = USB_DT_CS_INTERFACE,
|
||||
.bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE,
|
||||
|
||||
.bmCapabilities = 0x00,
|
||||
.bDataInterface = 0x01,
|
||||
};
|
||||
|
||||
static struct usb_cdc_acm_descriptor rndis_acm_descriptor = {
|
||||
.bLength = sizeof rndis_acm_descriptor,
|
||||
.bDescriptorType = USB_DT_CS_INTERFACE,
|
||||
.bDescriptorSubType = USB_CDC_ACM_TYPE,
|
||||
|
||||
.bmCapabilities = 0x00,
|
||||
};
|
||||
|
||||
static struct usb_cdc_union_desc rndis_union_desc = {
|
||||
.bLength = sizeof(rndis_union_desc),
|
||||
.bDescriptorType = USB_DT_CS_INTERFACE,
|
||||
.bDescriptorSubType = USB_CDC_UNION_TYPE,
|
||||
/* .bMasterInterface0 = DYNAMIC */
|
||||
/* .bSlaveInterface0 = DYNAMIC */
|
||||
};
|
||||
|
||||
/* the data interface has two bulk endpoints */
|
||||
|
||||
static struct usb_interface_descriptor rndis_data_intf = {
|
||||
.bLength = sizeof rndis_data_intf,
|
||||
.bDescriptorType = USB_DT_INTERFACE,
|
||||
|
||||
/* .bInterfaceNumber = DYNAMIC */
|
||||
.bNumEndpoints = 2,
|
||||
.bInterfaceClass = USB_CLASS_CDC_DATA,
|
||||
.bInterfaceSubClass = 0,
|
||||
.bInterfaceProtocol = 0,
|
||||
/* .iInterface = DYNAMIC */
|
||||
};
|
||||
|
||||
|
||||
static struct usb_interface_assoc_descriptor
|
||||
rndis_iad_descriptor = {
|
||||
.bLength = sizeof rndis_iad_descriptor,
|
||||
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
|
||||
|
||||
.bFirstInterface = 0, /* XXX, hardcoded */
|
||||
.bInterfaceCount = 2, // control + data
|
||||
.bFunctionClass = USB_CLASS_COMM,
|
||||
.bFunctionSubClass = USB_CDC_SUBCLASS_ETHERNET,
|
||||
.bFunctionProtocol = USB_CDC_PROTO_NONE,
|
||||
/* .iFunction = DYNAMIC */
|
||||
};
|
||||
|
||||
/* full speed support: */
|
||||
|
||||
static struct usb_endpoint_descriptor fs_notify_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
.bEndpointAddress = USB_DIR_IN,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_INT,
|
||||
.wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
|
||||
.bInterval = 1 << LOG2_STATUS_INTERVAL_MSEC,
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor fs_in_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
.bEndpointAddress = USB_DIR_IN,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor fs_out_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
.bEndpointAddress = USB_DIR_OUT,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
};
|
||||
|
||||
static struct usb_descriptor_header *eth_fs_function[] = {
|
||||
(struct usb_descriptor_header *) &rndis_iad_descriptor,
|
||||
|
||||
/* control interface matches ACM, not Ethernet */
|
||||
(struct usb_descriptor_header *) &rndis_control_intf,
|
||||
(struct usb_descriptor_header *) &header_desc,
|
||||
(struct usb_descriptor_header *) &call_mgmt_descriptor,
|
||||
(struct usb_descriptor_header *) &rndis_acm_descriptor,
|
||||
(struct usb_descriptor_header *) &rndis_union_desc,
|
||||
(struct usb_descriptor_header *) &fs_notify_desc,
|
||||
|
||||
/* data interface has no altsetting */
|
||||
(struct usb_descriptor_header *) &rndis_data_intf,
|
||||
(struct usb_descriptor_header *) &fs_in_desc,
|
||||
(struct usb_descriptor_header *) &fs_out_desc,
|
||||
NULL,
|
||||
};
|
||||
|
||||
/* high speed support: */
|
||||
|
||||
static struct usb_endpoint_descriptor hs_notify_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
.bEndpointAddress = USB_DIR_IN,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_INT,
|
||||
.wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
|
||||
.bInterval = LOG2_STATUS_INTERVAL_MSEC + 4,
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor hs_in_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
.bEndpointAddress = USB_DIR_IN,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
.wMaxPacketSize = cpu_to_le16(512),
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor hs_out_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
.bEndpointAddress = USB_DIR_OUT,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
.wMaxPacketSize = cpu_to_le16(512),
|
||||
};
|
||||
|
||||
static struct usb_descriptor_header *eth_hs_function[] = {
|
||||
(struct usb_descriptor_header *) &rndis_iad_descriptor,
|
||||
|
||||
/* control interface matches ACM, not Ethernet */
|
||||
(struct usb_descriptor_header *) &rndis_control_intf,
|
||||
(struct usb_descriptor_header *) &header_desc,
|
||||
(struct usb_descriptor_header *) &call_mgmt_descriptor,
|
||||
(struct usb_descriptor_header *) &rndis_acm_descriptor,
|
||||
(struct usb_descriptor_header *) &rndis_union_desc,
|
||||
(struct usb_descriptor_header *) &hs_notify_desc,
|
||||
|
||||
/* data interface has no altsetting */
|
||||
(struct usb_descriptor_header *) &rndis_data_intf,
|
||||
(struct usb_descriptor_header *) &hs_in_desc,
|
||||
(struct usb_descriptor_header *) &hs_out_desc,
|
||||
NULL,
|
||||
};
|
||||
|
||||
/* super speed support: */
|
||||
|
||||
static struct usb_endpoint_descriptor ss_notify_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
.bEndpointAddress = USB_DIR_IN,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_INT,
|
||||
.wMaxPacketSize = cpu_to_le16(STATUS_BYTECOUNT),
|
||||
.bInterval = LOG2_STATUS_INTERVAL_MSEC + 4,
|
||||
};
|
||||
|
||||
static struct usb_ss_ep_comp_descriptor ss_intr_comp_desc = {
|
||||
.bLength = sizeof ss_intr_comp_desc,
|
||||
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
|
||||
|
||||
/* the following 3 values can be tweaked if necessary */
|
||||
/* .bMaxBurst = 0, */
|
||||
/* .bmAttributes = 0, */
|
||||
.wBytesPerInterval = cpu_to_le16(STATUS_BYTECOUNT),
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor ss_in_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
.bEndpointAddress = USB_DIR_IN,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
.wMaxPacketSize = cpu_to_le16(1024),
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor ss_out_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
.bEndpointAddress = USB_DIR_OUT,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
.wMaxPacketSize = cpu_to_le16(1024),
|
||||
};
|
||||
|
||||
static struct usb_ss_ep_comp_descriptor ss_bulk_comp_desc = {
|
||||
.bLength = sizeof ss_bulk_comp_desc,
|
||||
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
|
||||
|
||||
/* the following 2 values can be tweaked if necessary */
|
||||
/* .bMaxBurst = 0, */
|
||||
/* .bmAttributes = 0, */
|
||||
};
|
||||
|
||||
static struct usb_descriptor_header *eth_ss_function[] = {
|
||||
(struct usb_descriptor_header *) &rndis_iad_descriptor,
|
||||
|
||||
/* control interface matches ACM, not Ethernet */
|
||||
(struct usb_descriptor_header *) &rndis_control_intf,
|
||||
(struct usb_descriptor_header *) &header_desc,
|
||||
(struct usb_descriptor_header *) &call_mgmt_descriptor,
|
||||
(struct usb_descriptor_header *) &rndis_acm_descriptor,
|
||||
(struct usb_descriptor_header *) &rndis_union_desc,
|
||||
(struct usb_descriptor_header *) &ss_notify_desc,
|
||||
(struct usb_descriptor_header *) &ss_intr_comp_desc,
|
||||
|
||||
/* data interface has no altsetting */
|
||||
(struct usb_descriptor_header *) &rndis_data_intf,
|
||||
(struct usb_descriptor_header *) &ss_in_desc,
|
||||
(struct usb_descriptor_header *) &ss_bulk_comp_desc,
|
||||
(struct usb_descriptor_header *) &ss_out_desc,
|
||||
(struct usb_descriptor_header *) &ss_bulk_comp_desc,
|
||||
NULL,
|
||||
};
|
||||
|
||||
/* string descriptors: */
|
||||
|
||||
static struct usb_string rndis_string_defs[] = {
|
||||
[0].s = "RNDIS Communications Control",
|
||||
[1].s = "RNDIS Ethernet Data",
|
||||
[2].s = "RNDIS",
|
||||
{ } /* end of list */
|
||||
};
|
||||
|
||||
static struct usb_gadget_strings rndis_string_table = {
|
||||
.language = 0x0409, /* en-us */
|
||||
.strings = rndis_string_defs,
|
||||
};
|
||||
|
||||
static struct usb_gadget_strings *rndis_strings[] = {
|
||||
&rndis_string_table,
|
||||
NULL,
|
||||
};
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
static struct sk_buff *rndis_add_header(struct gether *port,
|
||||
struct sk_buff *skb)
|
||||
{
|
||||
struct sk_buff *skb2;
|
||||
|
||||
skb2 = skb_realloc_headroom(skb, sizeof(struct rndis_packet_msg_type));
|
||||
if (skb2)
|
||||
rndis_add_hdr(skb2);
|
||||
|
||||
dev_kfree_skb_any(skb);
|
||||
return skb2;
|
||||
}
|
||||
|
||||
static void rndis_response_available(void *_rndis)
|
||||
{
|
||||
struct f_rndis *rndis = _rndis;
|
||||
struct usb_request *req = rndis->notify_req;
|
||||
struct usb_composite_dev *cdev = rndis->port.func.config->cdev;
|
||||
__le32 *data = req->buf;
|
||||
int status;
|
||||
|
||||
if (atomic_inc_return(&rndis->notify_count) != 1)
|
||||
return;
|
||||
|
||||
/* Send RNDIS RESPONSE_AVAILABLE notification; a
|
||||
* USB_CDC_NOTIFY_RESPONSE_AVAILABLE "should" work too
|
||||
*
|
||||
* This is the only notification defined by RNDIS.
|
||||
*/
|
||||
data[0] = cpu_to_le32(1);
|
||||
data[1] = cpu_to_le32(0);
|
||||
|
||||
status = usb_ep_queue(rndis->notify, req, GFP_ATOMIC);
|
||||
if (status) {
|
||||
atomic_dec(&rndis->notify_count);
|
||||
DBG(cdev, "notify/0 --> %d\n", status);
|
||||
}
|
||||
}
|
||||
|
||||
static void rndis_response_complete(struct usb_ep *ep, struct usb_request *req)
|
||||
{
|
||||
struct f_rndis *rndis = req->context;
|
||||
struct usb_composite_dev *cdev = rndis->port.func.config->cdev;
|
||||
int status = req->status;
|
||||
|
||||
/* after TX:
|
||||
* - USB_CDC_GET_ENCAPSULATED_RESPONSE (ep0/control)
|
||||
* - RNDIS_RESPONSE_AVAILABLE (status/irq)
|
||||
*/
|
||||
switch (status) {
|
||||
case -ECONNRESET:
|
||||
case -ESHUTDOWN:
|
||||
/* connection gone */
|
||||
atomic_set(&rndis->notify_count, 0);
|
||||
break;
|
||||
default:
|
||||
DBG(cdev, "RNDIS %s response error %d, %d/%d\n",
|
||||
ep->name, status,
|
||||
req->actual, req->length);
|
||||
/* FALLTHROUGH */
|
||||
case 0:
|
||||
if (ep != rndis->notify)
|
||||
break;
|
||||
|
||||
/* handle multiple pending RNDIS_RESPONSE_AVAILABLE
|
||||
* notifications by resending until we're done
|
||||
*/
|
||||
if (atomic_dec_and_test(&rndis->notify_count))
|
||||
break;
|
||||
status = usb_ep_queue(rndis->notify, req, GFP_ATOMIC);
|
||||
if (status) {
|
||||
atomic_dec(&rndis->notify_count);
|
||||
DBG(cdev, "notify/1 --> %d\n", status);
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void rndis_command_complete(struct usb_ep *ep, struct usb_request *req)
|
||||
{
|
||||
struct f_rndis *rndis = req->context;
|
||||
struct usb_composite_dev *cdev = rndis->port.func.config->cdev;
|
||||
int status;
|
||||
|
||||
/* received RNDIS command from USB_CDC_SEND_ENCAPSULATED_COMMAND */
|
||||
// spin_lock(&dev->lock);
|
||||
status = rndis_msg_parser(rndis->config, (u8 *) req->buf);
|
||||
if (status < 0)
|
||||
ERROR(cdev, "RNDIS command error %d, %d/%d\n",
|
||||
status, req->actual, req->length);
|
||||
// spin_unlock(&dev->lock);
|
||||
}
|
||||
|
||||
static int
|
||||
rndis_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
|
||||
{
|
||||
struct f_rndis *rndis = func_to_rndis(f);
|
||||
struct usb_composite_dev *cdev = f->config->cdev;
|
||||
struct usb_request *req = cdev->req;
|
||||
int value = -EOPNOTSUPP;
|
||||
u16 w_index = le16_to_cpu(ctrl->wIndex);
|
||||
u16 w_value = le16_to_cpu(ctrl->wValue);
|
||||
u16 w_length = le16_to_cpu(ctrl->wLength);
|
||||
|
||||
/* composite driver infrastructure handles everything except
|
||||
* CDC class messages; interface activation uses set_alt().
|
||||
*/
|
||||
switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
|
||||
|
||||
/* RNDIS uses the CDC command encapsulation mechanism to implement
|
||||
* an RPC scheme, with much getting/setting of attributes by OID.
|
||||
*/
|
||||
case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
||||
| USB_CDC_SEND_ENCAPSULATED_COMMAND:
|
||||
if (w_value || w_index != rndis->ctrl_id)
|
||||
goto invalid;
|
||||
/* read the request; process it later */
|
||||
value = w_length;
|
||||
req->complete = rndis_command_complete;
|
||||
req->context = rndis;
|
||||
/* later, rndis_response_available() sends a notification */
|
||||
break;
|
||||
|
||||
case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8)
|
||||
| USB_CDC_GET_ENCAPSULATED_RESPONSE:
|
||||
if (w_value || w_index != rndis->ctrl_id)
|
||||
goto invalid;
|
||||
else {
|
||||
u8 *buf;
|
||||
u32 n;
|
||||
|
||||
/* return the result */
|
||||
buf = rndis_get_next_response(rndis->config, &n);
|
||||
if (buf) {
|
||||
memcpy(req->buf, buf, n);
|
||||
req->complete = rndis_response_complete;
|
||||
req->context = rndis;
|
||||
rndis_free_response(rndis->config, buf);
|
||||
value = n;
|
||||
}
|
||||
/* else stalls ... spec says to avoid that */
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
invalid:
|
||||
VDBG(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
|
||||
ctrl->bRequestType, ctrl->bRequest,
|
||||
w_value, w_index, w_length);
|
||||
}
|
||||
|
||||
/* respond with data transfer or status phase? */
|
||||
if (value >= 0) {
|
||||
DBG(cdev, "rndis req%02x.%02x v%04x i%04x l%d\n",
|
||||
ctrl->bRequestType, ctrl->bRequest,
|
||||
w_value, w_index, w_length);
|
||||
req->zero = (value < w_length);
|
||||
req->length = value;
|
||||
value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
|
||||
if (value < 0)
|
||||
ERROR(cdev, "rndis response on err %d\n", value);
|
||||
}
|
||||
|
||||
/* device either stalls (value < 0) or reports success */
|
||||
return value;
|
||||
}
|
||||
|
||||
|
||||
static int rndis_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
|
||||
{
|
||||
struct f_rndis *rndis = func_to_rndis(f);
|
||||
struct usb_composite_dev *cdev = f->config->cdev;
|
||||
|
||||
/* we know alt == 0 */
|
||||
|
||||
if (intf == rndis->ctrl_id) {
|
||||
if (rndis->notify->driver_data) {
|
||||
VDBG(cdev, "reset rndis control %d\n", intf);
|
||||
usb_ep_disable(rndis->notify);
|
||||
}
|
||||
if (!rndis->notify->desc) {
|
||||
VDBG(cdev, "init rndis ctrl %d\n", intf);
|
||||
if (config_ep_by_speed(cdev->gadget, f, rndis->notify))
|
||||
goto fail;
|
||||
}
|
||||
usb_ep_enable(rndis->notify);
|
||||
rndis->notify->driver_data = rndis;
|
||||
|
||||
} else if (intf == rndis->data_id) {
|
||||
struct net_device *net;
|
||||
|
||||
if (rndis->port.in_ep->driver_data) {
|
||||
DBG(cdev, "reset rndis\n");
|
||||
gether_disconnect(&rndis->port);
|
||||
}
|
||||
|
||||
if (!rndis->port.in_ep->desc || !rndis->port.out_ep->desc) {
|
||||
DBG(cdev, "init rndis\n");
|
||||
if (config_ep_by_speed(cdev->gadget, f,
|
||||
rndis->port.in_ep) ||
|
||||
config_ep_by_speed(cdev->gadget, f,
|
||||
rndis->port.out_ep)) {
|
||||
rndis->port.in_ep->desc = NULL;
|
||||
rndis->port.out_ep->desc = NULL;
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
|
||||
/* Avoid ZLPs; they can be troublesome. */
|
||||
rndis->port.is_zlp_ok = false;
|
||||
|
||||
/* RNDIS should be in the "RNDIS uninitialized" state,
|
||||
* either never activated or after rndis_uninit().
|
||||
*
|
||||
* We don't want data to flow here until a nonzero packet
|
||||
* filter is set, at which point it enters "RNDIS data
|
||||
* initialized" state ... but we do want the endpoints
|
||||
* to be activated. It's a strange little state.
|
||||
*
|
||||
* REVISIT the RNDIS gadget code has done this wrong for a
|
||||
* very long time. We need another call to the link layer
|
||||
* code -- gether_updown(...bool) maybe -- to do it right.
|
||||
*/
|
||||
rndis->port.cdc_filter = 0;
|
||||
|
||||
DBG(cdev, "RNDIS RX/TX early activation ... \n");
|
||||
net = gether_connect(&rndis->port);
|
||||
if (IS_ERR(net))
|
||||
return PTR_ERR(net);
|
||||
|
||||
rndis_set_param_dev(rndis->config, net,
|
||||
&rndis->port.cdc_filter);
|
||||
} else
|
||||
goto fail;
|
||||
|
||||
return 0;
|
||||
fail:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static void rndis_disable(struct usb_function *f)
|
||||
{
|
||||
struct f_rndis *rndis = func_to_rndis(f);
|
||||
struct usb_composite_dev *cdev = f->config->cdev;
|
||||
|
||||
if (!rndis->notify->driver_data)
|
||||
return;
|
||||
|
||||
DBG(cdev, "rndis deactivated\n");
|
||||
|
||||
rndis_uninit(rndis->config);
|
||||
gether_disconnect(&rndis->port);
|
||||
|
||||
usb_ep_disable(rndis->notify);
|
||||
rndis->notify->driver_data = NULL;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* This isn't quite the same mechanism as CDC Ethernet, since the
|
||||
* notification scheme passes less data, but the same set of link
|
||||
* states must be tested. A key difference is that altsettings are
|
||||
* not used to tell whether the link should send packets or not.
|
||||
*/
|
||||
|
||||
static void rndis_open(struct gether *geth)
|
||||
{
|
||||
struct f_rndis *rndis = func_to_rndis(&geth->func);
|
||||
struct usb_composite_dev *cdev = geth->func.config->cdev;
|
||||
|
||||
DBG(cdev, "%s\n", __func__);
|
||||
|
||||
rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3,
|
||||
bitrate(cdev->gadget) / 100);
|
||||
rndis_signal_connect(rndis->config);
|
||||
}
|
||||
|
||||
static void rndis_close(struct gether *geth)
|
||||
{
|
||||
struct f_rndis *rndis = func_to_rndis(&geth->func);
|
||||
|
||||
DBG(geth->func.config->cdev, "%s\n", __func__);
|
||||
|
||||
rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0);
|
||||
rndis_signal_disconnect(rndis->config);
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/* ethernet function driver setup/binding */
|
||||
|
||||
static int
|
||||
rndis_bind(struct usb_configuration *c, struct usb_function *f)
|
||||
{
|
||||
struct usb_composite_dev *cdev = c->cdev;
|
||||
struct f_rndis *rndis = func_to_rndis(f);
|
||||
int status;
|
||||
struct usb_ep *ep;
|
||||
|
||||
/* allocate instance-specific interface IDs */
|
||||
status = usb_interface_id(c, f);
|
||||
if (status < 0)
|
||||
goto fail;
|
||||
rndis->ctrl_id = status;
|
||||
rndis_iad_descriptor.bFirstInterface = status;
|
||||
|
||||
rndis_control_intf.bInterfaceNumber = status;
|
||||
rndis_union_desc.bMasterInterface0 = status;
|
||||
|
||||
status = usb_interface_id(c, f);
|
||||
if (status < 0)
|
||||
goto fail;
|
||||
rndis->data_id = status;
|
||||
|
||||
rndis_data_intf.bInterfaceNumber = status;
|
||||
rndis_union_desc.bSlaveInterface0 = status;
|
||||
|
||||
status = -ENODEV;
|
||||
|
||||
/* allocate instance-specific endpoints */
|
||||
ep = usb_ep_autoconfig(cdev->gadget, &fs_in_desc);
|
||||
if (!ep)
|
||||
goto fail;
|
||||
rndis->port.in_ep = ep;
|
||||
ep->driver_data = cdev; /* claim */
|
||||
|
||||
ep = usb_ep_autoconfig(cdev->gadget, &fs_out_desc);
|
||||
if (!ep)
|
||||
goto fail;
|
||||
rndis->port.out_ep = ep;
|
||||
ep->driver_data = cdev; /* claim */
|
||||
|
||||
/* NOTE: a status/notification endpoint is, strictly speaking,
|
||||
* optional. We don't treat it that way though! It's simpler,
|
||||
* and some newer profiles don't treat it as optional.
|
||||
*/
|
||||
ep = usb_ep_autoconfig(cdev->gadget, &fs_notify_desc);
|
||||
if (!ep)
|
||||
goto fail;
|
||||
rndis->notify = ep;
|
||||
ep->driver_data = cdev; /* claim */
|
||||
|
||||
status = -ENOMEM;
|
||||
|
||||
/* allocate notification request and buffer */
|
||||
rndis->notify_req = usb_ep_alloc_request(ep, GFP_KERNEL);
|
||||
if (!rndis->notify_req)
|
||||
goto fail;
|
||||
rndis->notify_req->buf = kmalloc(STATUS_BYTECOUNT, GFP_KERNEL);
|
||||
if (!rndis->notify_req->buf)
|
||||
goto fail;
|
||||
rndis->notify_req->length = STATUS_BYTECOUNT;
|
||||
rndis->notify_req->context = rndis;
|
||||
rndis->notify_req->complete = rndis_response_complete;
|
||||
|
||||
/* copy descriptors, and track endpoint copies */
|
||||
f->descriptors = usb_copy_descriptors(eth_fs_function);
|
||||
if (!f->descriptors)
|
||||
goto fail;
|
||||
|
||||
/* support all relevant hardware speeds... we expect that when
|
||||
* hardware is dual speed, all bulk-capable endpoints work at
|
||||
* both speeds
|
||||
*/
|
||||
if (gadget_is_dualspeed(c->cdev->gadget)) {
|
||||
hs_in_desc.bEndpointAddress =
|
||||
fs_in_desc.bEndpointAddress;
|
||||
hs_out_desc.bEndpointAddress =
|
||||
fs_out_desc.bEndpointAddress;
|
||||
hs_notify_desc.bEndpointAddress =
|
||||
fs_notify_desc.bEndpointAddress;
|
||||
|
||||
/* copy descriptors, and track endpoint copies */
|
||||
f->hs_descriptors = usb_copy_descriptors(eth_hs_function);
|
||||
if (!f->hs_descriptors)
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if (gadget_is_superspeed(c->cdev->gadget)) {
|
||||
ss_in_desc.bEndpointAddress =
|
||||
fs_in_desc.bEndpointAddress;
|
||||
ss_out_desc.bEndpointAddress =
|
||||
fs_out_desc.bEndpointAddress;
|
||||
ss_notify_desc.bEndpointAddress =
|
||||
fs_notify_desc.bEndpointAddress;
|
||||
|
||||
/* copy descriptors, and track endpoint copies */
|
||||
f->ss_descriptors = usb_copy_descriptors(eth_ss_function);
|
||||
if (!f->ss_descriptors)
|
||||
goto fail;
|
||||
}
|
||||
|
||||
rndis->port.open = rndis_open;
|
||||
rndis->port.close = rndis_close;
|
||||
|
||||
status = rndis_register(rndis_response_available, rndis);
|
||||
if (status < 0)
|
||||
goto fail;
|
||||
rndis->config = status;
|
||||
|
||||
rndis_set_param_medium(rndis->config, RNDIS_MEDIUM_802_3, 0);
|
||||
rndis_set_host_mac(rndis->config, rndis->ethaddr);
|
||||
|
||||
if (rndis->manufacturer && rndis->vendorID &&
|
||||
rndis_set_param_vendor(rndis->config, rndis->vendorID,
|
||||
rndis->manufacturer))
|
||||
goto fail;
|
||||
|
||||
/* NOTE: all that is done without knowing or caring about
|
||||
* the network link ... which is unavailable to this code
|
||||
* until we're activated via set_alt().
|
||||
*/
|
||||
|
||||
DBG(cdev, "RNDIS: %s speed IN/%s OUT/%s NOTIFY/%s\n",
|
||||
gadget_is_superspeed(c->cdev->gadget) ? "super" :
|
||||
gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
|
||||
rndis->port.in_ep->name, rndis->port.out_ep->name,
|
||||
rndis->notify->name);
|
||||
return 0;
|
||||
|
||||
fail:
|
||||
if (gadget_is_superspeed(c->cdev->gadget) && f->ss_descriptors)
|
||||
usb_free_descriptors(f->ss_descriptors);
|
||||
if (gadget_is_dualspeed(c->cdev->gadget) && f->hs_descriptors)
|
||||
usb_free_descriptors(f->hs_descriptors);
|
||||
if (f->descriptors)
|
||||
usb_free_descriptors(f->descriptors);
|
||||
|
||||
if (rndis->notify_req) {
|
||||
kfree(rndis->notify_req->buf);
|
||||
usb_ep_free_request(rndis->notify, rndis->notify_req);
|
||||
}
|
||||
|
||||
/* we might as well release our claims on endpoints */
|
||||
if (rndis->notify)
|
||||
rndis->notify->driver_data = NULL;
|
||||
if (rndis->port.out_ep->desc)
|
||||
rndis->port.out_ep->driver_data = NULL;
|
||||
if (rndis->port.in_ep->desc)
|
||||
rndis->port.in_ep->driver_data = NULL;
|
||||
|
||||
ERROR(cdev, "%s: can't bind, err %d\n", f->name, status);
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
static void
|
||||
rndis_unbind(struct usb_configuration *c, struct usb_function *f)
|
||||
{
|
||||
struct f_rndis *rndis = func_to_rndis(f);
|
||||
|
||||
rndis_deregister(rndis->config);
|
||||
rndis_exit();
|
||||
rndis_string_defs[0].id = 0;
|
||||
|
||||
if (gadget_is_superspeed(c->cdev->gadget))
|
||||
usb_free_descriptors(f->ss_descriptors);
|
||||
if (gadget_is_dualspeed(c->cdev->gadget))
|
||||
usb_free_descriptors(f->hs_descriptors);
|
||||
usb_free_descriptors(f->descriptors);
|
||||
|
||||
kfree(rndis->notify_req->buf);
|
||||
usb_ep_free_request(rndis->notify, rndis->notify_req);
|
||||
|
||||
kfree(rndis);
|
||||
}
|
||||
|
||||
/* Some controllers can't support RNDIS ... */
|
||||
static inline bool can_support_rndis(struct usb_configuration *c)
|
||||
{
|
||||
/* everything else is *presumably* fine */
|
||||
return true;
|
||||
}
|
||||
|
||||
int
|
||||
rndis_bind_config_vendor(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
|
||||
u32 vendorID, const char *manufacturer)
|
||||
{
|
||||
struct f_rndis *rndis;
|
||||
int status;
|
||||
|
||||
if (!can_support_rndis(c) || !ethaddr)
|
||||
return -EINVAL;
|
||||
|
||||
/* maybe allocate device-global string IDs */
|
||||
if (rndis_string_defs[0].id == 0) {
|
||||
|
||||
/* ... and setup RNDIS itself */
|
||||
status = rndis_init();
|
||||
if (status < 0)
|
||||
return status;
|
||||
|
||||
/* control interface label */
|
||||
status = usb_string_id(c->cdev);
|
||||
if (status < 0)
|
||||
return status;
|
||||
rndis_string_defs[0].id = status;
|
||||
rndis_control_intf.iInterface = status;
|
||||
|
||||
/* data interface label */
|
||||
status = usb_string_id(c->cdev);
|
||||
if (status < 0)
|
||||
return status;
|
||||
rndis_string_defs[1].id = status;
|
||||
rndis_data_intf.iInterface = status;
|
||||
|
||||
/* IAD iFunction label */
|
||||
status = usb_string_id(c->cdev);
|
||||
if (status < 0)
|
||||
return status;
|
||||
rndis_string_defs[2].id = status;
|
||||
rndis_iad_descriptor.iFunction = status;
|
||||
}
|
||||
|
||||
/* allocate and initialize one new instance */
|
||||
status = -ENOMEM;
|
||||
rndis = kzalloc(sizeof *rndis, GFP_KERNEL);
|
||||
if (!rndis)
|
||||
goto fail;
|
||||
|
||||
memcpy(rndis->ethaddr, ethaddr, ETH_ALEN);
|
||||
rndis->vendorID = vendorID;
|
||||
rndis->manufacturer = manufacturer;
|
||||
|
||||
/* RNDIS activates when the host changes this filter */
|
||||
rndis->port.cdc_filter = 0;
|
||||
|
||||
/* RNDIS has special (and complex) framing */
|
||||
rndis->port.header_len = sizeof(struct rndis_packet_msg_type);
|
||||
rndis->port.wrap = rndis_add_header;
|
||||
rndis->port.unwrap = rndis_rm_hdr;
|
||||
|
||||
rndis->port.func.name = "rndis";
|
||||
rndis->port.func.strings = rndis_strings;
|
||||
/* descriptors are per-instance copies */
|
||||
rndis->port.func.bind = rndis_bind;
|
||||
rndis->port.func.unbind = rndis_unbind;
|
||||
rndis->port.func.set_alt = rndis_set_alt;
|
||||
rndis->port.func.setup = rndis_setup;
|
||||
rndis->port.func.disable = rndis_disable;
|
||||
|
||||
status = usb_add_function(c, &rndis->port.func);
|
||||
if (status) {
|
||||
kfree(rndis);
|
||||
fail:
|
||||
rndis_exit();
|
||||
}
|
||||
return status;
|
||||
}
|
||||
150
drivers/staging/ccg/gadget_chips.h
Normal file
150
drivers/staging/ccg/gadget_chips.h
Normal file
|
|
@ -0,0 +1,150 @@
|
|||
/*
|
||||
* USB device controllers have lots of quirks. Use these macros in
|
||||
* gadget drivers or other code that needs to deal with them, and which
|
||||
* autoconfigures instead of using early binding to the hardware.
|
||||
*
|
||||
* This SHOULD eventually work like the ARM mach_is_*() stuff, driven by
|
||||
* some config file that gets updated as new hardware is supported.
|
||||
* (And avoiding all runtime comparisons in typical one-choice configs!)
|
||||
*
|
||||
* NOTE: some of these controller drivers may not be available yet.
|
||||
* Some are available on 2.4 kernels; several are available, but not
|
||||
* yet pushed in the 2.6 mainline tree.
|
||||
*/
|
||||
|
||||
#ifndef __GADGET_CHIPS_H
|
||||
#define __GADGET_CHIPS_H
|
||||
|
||||
/*
|
||||
* NOTICE: the entries below are alphabetical and should be kept
|
||||
* that way.
|
||||
*
|
||||
* Always be sure to add new entries to the correct position or
|
||||
* accept the bashing later.
|
||||
*
|
||||
* If you have forgotten the alphabetical order let VIM/EMACS
|
||||
* do that for you.
|
||||
*/
|
||||
#define gadget_is_amd5536udc(g) (!strcmp("amd5536udc", (g)->name))
|
||||
#define gadget_is_at91(g) (!strcmp("at91_udc", (g)->name))
|
||||
#define gadget_is_atmel_usba(g) (!strcmp("atmel_usba_udc", (g)->name))
|
||||
#define gadget_is_bcm63xx(g) (!strcmp("bcm63xx_udc", (g)->name))
|
||||
#define gadget_is_ci13xxx_msm(g) (!strcmp("ci13xxx_msm", (g)->name))
|
||||
#define gadget_is_ci13xxx_pci(g) (!strcmp("ci13xxx_pci", (g)->name))
|
||||
#define gadget_is_dummy(g) (!strcmp("dummy_udc", (g)->name))
|
||||
#define gadget_is_dwc3(g) (!strcmp("dwc3-gadget", (g)->name))
|
||||
#define gadget_is_fsl_qe(g) (!strcmp("fsl_qe_udc", (g)->name))
|
||||
#define gadget_is_fsl_usb2(g) (!strcmp("fsl-usb2-udc", (g)->name))
|
||||
#define gadget_is_goku(g) (!strcmp("goku_udc", (g)->name))
|
||||
#define gadget_is_imx(g) (!strcmp("imx_udc", (g)->name))
|
||||
#define gadget_is_langwell(g) (!strcmp("langwell_udc", (g)->name))
|
||||
#define gadget_is_lpc32xx(g) (!strcmp("lpc32xx_udc", (g)->name))
|
||||
#define gadget_is_m66592(g) (!strcmp("m66592_udc", (g)->name))
|
||||
#define gadget_is_musbhdrc(g) (!strcmp("musb-hdrc", (g)->name))
|
||||
#define gadget_is_net2272(g) (!strcmp("net2272", (g)->name))
|
||||
#define gadget_is_net2280(g) (!strcmp("net2280", (g)->name))
|
||||
#define gadget_is_omap(g) (!strcmp("omap_udc", (g)->name))
|
||||
#define gadget_is_pch(g) (!strcmp("pch_udc", (g)->name))
|
||||
#define gadget_is_pxa(g) (!strcmp("pxa25x_udc", (g)->name))
|
||||
#define gadget_is_pxa27x(g) (!strcmp("pxa27x_udc", (g)->name))
|
||||
#define gadget_is_r8a66597(g) (!strcmp("r8a66597_udc", (g)->name))
|
||||
#define gadget_is_renesas_usbhs(g) (!strcmp("renesas_usbhs_udc", (g)->name))
|
||||
#define gadget_is_s3c2410(g) (!strcmp("s3c2410_udc", (g)->name))
|
||||
#define gadget_is_s3c_hsotg(g) (!strcmp("s3c-hsotg", (g)->name))
|
||||
#define gadget_is_s3c_hsudc(g) (!strcmp("s3c-hsudc", (g)->name))
|
||||
|
||||
/**
|
||||
* usb_gadget_controller_number - support bcdDevice id convention
|
||||
* @gadget: the controller being driven
|
||||
*
|
||||
* Return a 2-digit BCD value associated with the peripheral controller,
|
||||
* suitable for use as part of a bcdDevice value, or a negative error code.
|
||||
*
|
||||
* NOTE: this convention is purely optional, and has no meaning in terms of
|
||||
* any USB specification. If you want to use a different convention in your
|
||||
* gadget driver firmware -- maybe a more formal revision ID -- feel free.
|
||||
*
|
||||
* Hosts see these bcdDevice numbers, and are allowed (but not encouraged!)
|
||||
* to change their behavior accordingly. For example it might help avoiding
|
||||
* some chip bug.
|
||||
*/
|
||||
static inline int usb_gadget_controller_number(struct usb_gadget *gadget)
|
||||
{
|
||||
if (gadget_is_net2280(gadget))
|
||||
return 0x01;
|
||||
else if (gadget_is_dummy(gadget))
|
||||
return 0x02;
|
||||
else if (gadget_is_pxa(gadget))
|
||||
return 0x03;
|
||||
else if (gadget_is_goku(gadget))
|
||||
return 0x06;
|
||||
else if (gadget_is_omap(gadget))
|
||||
return 0x08;
|
||||
else if (gadget_is_pxa27x(gadget))
|
||||
return 0x11;
|
||||
else if (gadget_is_s3c2410(gadget))
|
||||
return 0x12;
|
||||
else if (gadget_is_at91(gadget))
|
||||
return 0x13;
|
||||
else if (gadget_is_imx(gadget))
|
||||
return 0x14;
|
||||
else if (gadget_is_musbhdrc(gadget))
|
||||
return 0x16;
|
||||
else if (gadget_is_atmel_usba(gadget))
|
||||
return 0x18;
|
||||
else if (gadget_is_fsl_usb2(gadget))
|
||||
return 0x19;
|
||||
else if (gadget_is_amd5536udc(gadget))
|
||||
return 0x20;
|
||||
else if (gadget_is_m66592(gadget))
|
||||
return 0x21;
|
||||
else if (gadget_is_fsl_qe(gadget))
|
||||
return 0x22;
|
||||
else if (gadget_is_ci13xxx_pci(gadget))
|
||||
return 0x23;
|
||||
else if (gadget_is_langwell(gadget))
|
||||
return 0x24;
|
||||
else if (gadget_is_r8a66597(gadget))
|
||||
return 0x25;
|
||||
else if (gadget_is_s3c_hsotg(gadget))
|
||||
return 0x26;
|
||||
else if (gadget_is_pch(gadget))
|
||||
return 0x27;
|
||||
else if (gadget_is_ci13xxx_msm(gadget))
|
||||
return 0x28;
|
||||
else if (gadget_is_renesas_usbhs(gadget))
|
||||
return 0x29;
|
||||
else if (gadget_is_s3c_hsudc(gadget))
|
||||
return 0x30;
|
||||
else if (gadget_is_net2272(gadget))
|
||||
return 0x31;
|
||||
else if (gadget_is_dwc3(gadget))
|
||||
return 0x32;
|
||||
else if (gadget_is_lpc32xx(gadget))
|
||||
return 0x33;
|
||||
else if (gadget_is_bcm63xx(gadget))
|
||||
return 0x34;
|
||||
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* gadget_supports_altsettings - return true if altsettings work
|
||||
* @gadget: the gadget in question
|
||||
*/
|
||||
static inline bool gadget_supports_altsettings(struct usb_gadget *gadget)
|
||||
{
|
||||
/* PXA 21x/25x/26x has no altsettings at all */
|
||||
if (gadget_is_pxa(gadget))
|
||||
return false;
|
||||
|
||||
/* PXA 27x and 3xx have *broken* altsetting support */
|
||||
if (gadget_is_pxa27x(gadget))
|
||||
return false;
|
||||
|
||||
/* Everything else is *presumably* fine ... */
|
||||
return true;
|
||||
}
|
||||
|
||||
#endif /* __GADGET_CHIPS_H */
|
||||
47
drivers/staging/ccg/ndis.h
Normal file
47
drivers/staging/ccg/ndis.h
Normal file
|
|
@ -0,0 +1,47 @@
|
|||
/*
|
||||
* ndis.h
|
||||
*
|
||||
* ntddndis.h modified by Benedikt Spranger <b.spranger@pengutronix.de>
|
||||
*
|
||||
* Thanks to the cygwin development team,
|
||||
* espacially to Casper S. Hornstrup <chorns@users.sourceforge.net>
|
||||
*
|
||||
* THIS SOFTWARE IS NOT COPYRIGHTED
|
||||
*
|
||||
* This source code is offered for use in the public domain. You may
|
||||
* use, modify or distribute it freely.
|
||||
*/
|
||||
|
||||
#ifndef _LINUX_NDIS_H
|
||||
#define _LINUX_NDIS_H
|
||||
|
||||
enum NDIS_DEVICE_POWER_STATE {
|
||||
NdisDeviceStateUnspecified = 0,
|
||||
NdisDeviceStateD0,
|
||||
NdisDeviceStateD1,
|
||||
NdisDeviceStateD2,
|
||||
NdisDeviceStateD3,
|
||||
NdisDeviceStateMaximum
|
||||
};
|
||||
|
||||
struct NDIS_PM_WAKE_UP_CAPABILITIES {
|
||||
enum NDIS_DEVICE_POWER_STATE MinMagicPacketWakeUp;
|
||||
enum NDIS_DEVICE_POWER_STATE MinPatternWakeUp;
|
||||
enum NDIS_DEVICE_POWER_STATE MinLinkChangeWakeUp;
|
||||
};
|
||||
|
||||
struct NDIS_PNP_CAPABILITIES {
|
||||
__le32 Flags;
|
||||
struct NDIS_PM_WAKE_UP_CAPABILITIES WakeUpCapabilities;
|
||||
};
|
||||
|
||||
struct NDIS_PM_PACKET_PATTERN {
|
||||
__le32 Priority;
|
||||
__le32 Reserved;
|
||||
__le32 MaskSize;
|
||||
__le32 PatternOffset;
|
||||
__le32 PatternSize;
|
||||
__le32 PatternFlags;
|
||||
};
|
||||
|
||||
#endif /* _LINUX_NDIS_H */
|
||||
1175
drivers/staging/ccg/rndis.c
Normal file
1175
drivers/staging/ccg/rndis.c
Normal file
File diff suppressed because it is too large
Load Diff
222
drivers/staging/ccg/rndis.h
Normal file
222
drivers/staging/ccg/rndis.h
Normal file
|
|
@ -0,0 +1,222 @@
|
|||
/*
|
||||
* RNDIS Definitions for Remote NDIS
|
||||
*
|
||||
* Authors: Benedikt Spranger, Pengutronix
|
||||
* Robert Schwebel, Pengutronix
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This software was originally developed in conformance with
|
||||
* Microsoft's Remote NDIS Specification License Agreement.
|
||||
*/
|
||||
|
||||
#ifndef _LINUX_RNDIS_H
|
||||
#define _LINUX_RNDIS_H
|
||||
|
||||
#include <linux/rndis.h>
|
||||
#include "ndis.h"
|
||||
|
||||
#define RNDIS_MAXIMUM_FRAME_SIZE 1518
|
||||
#define RNDIS_MAX_TOTAL_SIZE 1558
|
||||
|
||||
typedef struct rndis_init_msg_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 RequestID;
|
||||
__le32 MajorVersion;
|
||||
__le32 MinorVersion;
|
||||
__le32 MaxTransferSize;
|
||||
} rndis_init_msg_type;
|
||||
|
||||
typedef struct rndis_init_cmplt_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 RequestID;
|
||||
__le32 Status;
|
||||
__le32 MajorVersion;
|
||||
__le32 MinorVersion;
|
||||
__le32 DeviceFlags;
|
||||
__le32 Medium;
|
||||
__le32 MaxPacketsPerTransfer;
|
||||
__le32 MaxTransferSize;
|
||||
__le32 PacketAlignmentFactor;
|
||||
__le32 AFListOffset;
|
||||
__le32 AFListSize;
|
||||
} rndis_init_cmplt_type;
|
||||
|
||||
typedef struct rndis_halt_msg_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 RequestID;
|
||||
} rndis_halt_msg_type;
|
||||
|
||||
typedef struct rndis_query_msg_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 RequestID;
|
||||
__le32 OID;
|
||||
__le32 InformationBufferLength;
|
||||
__le32 InformationBufferOffset;
|
||||
__le32 DeviceVcHandle;
|
||||
} rndis_query_msg_type;
|
||||
|
||||
typedef struct rndis_query_cmplt_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 RequestID;
|
||||
__le32 Status;
|
||||
__le32 InformationBufferLength;
|
||||
__le32 InformationBufferOffset;
|
||||
} rndis_query_cmplt_type;
|
||||
|
||||
typedef struct rndis_set_msg_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 RequestID;
|
||||
__le32 OID;
|
||||
__le32 InformationBufferLength;
|
||||
__le32 InformationBufferOffset;
|
||||
__le32 DeviceVcHandle;
|
||||
} rndis_set_msg_type;
|
||||
|
||||
typedef struct rndis_set_cmplt_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 RequestID;
|
||||
__le32 Status;
|
||||
} rndis_set_cmplt_type;
|
||||
|
||||
typedef struct rndis_reset_msg_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 Reserved;
|
||||
} rndis_reset_msg_type;
|
||||
|
||||
typedef struct rndis_reset_cmplt_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 Status;
|
||||
__le32 AddressingReset;
|
||||
} rndis_reset_cmplt_type;
|
||||
|
||||
typedef struct rndis_indicate_status_msg_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 Status;
|
||||
__le32 StatusBufferLength;
|
||||
__le32 StatusBufferOffset;
|
||||
} rndis_indicate_status_msg_type;
|
||||
|
||||
typedef struct rndis_keepalive_msg_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 RequestID;
|
||||
} rndis_keepalive_msg_type;
|
||||
|
||||
typedef struct rndis_keepalive_cmplt_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 RequestID;
|
||||
__le32 Status;
|
||||
} rndis_keepalive_cmplt_type;
|
||||
|
||||
struct rndis_packet_msg_type
|
||||
{
|
||||
__le32 MessageType;
|
||||
__le32 MessageLength;
|
||||
__le32 DataOffset;
|
||||
__le32 DataLength;
|
||||
__le32 OOBDataOffset;
|
||||
__le32 OOBDataLength;
|
||||
__le32 NumOOBDataElements;
|
||||
__le32 PerPacketInfoOffset;
|
||||
__le32 PerPacketInfoLength;
|
||||
__le32 VcHandle;
|
||||
__le32 Reserved;
|
||||
} __attribute__ ((packed));
|
||||
|
||||
struct rndis_config_parameter
|
||||
{
|
||||
__le32 ParameterNameOffset;
|
||||
__le32 ParameterNameLength;
|
||||
__le32 ParameterType;
|
||||
__le32 ParameterValueOffset;
|
||||
__le32 ParameterValueLength;
|
||||
};
|
||||
|
||||
/* implementation specific */
|
||||
enum rndis_state
|
||||
{
|
||||
RNDIS_UNINITIALIZED,
|
||||
RNDIS_INITIALIZED,
|
||||
RNDIS_DATA_INITIALIZED,
|
||||
};
|
||||
|
||||
typedef struct rndis_resp_t
|
||||
{
|
||||
struct list_head list;
|
||||
u8 *buf;
|
||||
u32 length;
|
||||
int send;
|
||||
} rndis_resp_t;
|
||||
|
||||
typedef struct rndis_params
|
||||
{
|
||||
u8 confignr;
|
||||
u8 used;
|
||||
u16 saved_filter;
|
||||
enum rndis_state state;
|
||||
u32 medium;
|
||||
u32 speed;
|
||||
u32 media_state;
|
||||
|
||||
const u8 *host_mac;
|
||||
u16 *filter;
|
||||
struct net_device *dev;
|
||||
|
||||
u32 vendorID;
|
||||
const char *vendorDescr;
|
||||
void (*resp_avail)(void *v);
|
||||
void *v;
|
||||
struct list_head resp_queue;
|
||||
} rndis_params;
|
||||
|
||||
/* RNDIS Message parser and other useless functions */
|
||||
int rndis_msg_parser (u8 configNr, u8 *buf);
|
||||
int rndis_register(void (*resp_avail)(void *v), void *v);
|
||||
void rndis_deregister (int configNr);
|
||||
int rndis_set_param_dev (u8 configNr, struct net_device *dev,
|
||||
u16 *cdc_filter);
|
||||
int rndis_set_param_vendor (u8 configNr, u32 vendorID,
|
||||
const char *vendorDescr);
|
||||
int rndis_set_param_medium (u8 configNr, u32 medium, u32 speed);
|
||||
void rndis_add_hdr (struct sk_buff *skb);
|
||||
int rndis_rm_hdr(struct gether *port, struct sk_buff *skb,
|
||||
struct sk_buff_head *list);
|
||||
u8 *rndis_get_next_response (int configNr, u32 *length);
|
||||
void rndis_free_response (int configNr, u8 *buf);
|
||||
|
||||
void rndis_uninit (int configNr);
|
||||
int rndis_signal_connect (int configNr);
|
||||
int rndis_signal_disconnect (int configNr);
|
||||
int rndis_state (int configNr);
|
||||
extern void rndis_set_host_mac (int configNr, const u8 *addr);
|
||||
|
||||
int rndis_init(void);
|
||||
void rndis_exit (void);
|
||||
|
||||
#endif /* _LINUX_RNDIS_H */
|
||||
893
drivers/staging/ccg/storage_common.c
Normal file
893
drivers/staging/ccg/storage_common.c
Normal file
|
|
@ -0,0 +1,893 @@
|
|||
/*
|
||||
* storage_common.c -- Common definitions for mass storage functionality
|
||||
*
|
||||
* Copyright (C) 2003-2008 Alan Stern
|
||||
* Copyeight (C) 2009 Samsung Electronics
|
||||
* Author: Michal Nazarewicz (mina86@mina86.com)
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*/
|
||||
|
||||
|
||||
/*
|
||||
* This file requires the following identifiers used in USB strings to
|
||||
* be defined (each of type pointer to char):
|
||||
* - fsg_string_manufacturer -- name of the manufacturer
|
||||
* - fsg_string_product -- name of the product
|
||||
* - fsg_string_config -- name of the configuration
|
||||
* - fsg_string_interface -- name of the interface
|
||||
* The first four are only needed when FSG_DESCRIPTORS_DEVICE_STRINGS
|
||||
* macro is defined prior to including this file.
|
||||
*/
|
||||
|
||||
/*
|
||||
* When FSG_NO_INTR_EP is defined fsg_fs_intr_in_desc and
|
||||
* fsg_hs_intr_in_desc objects as well as
|
||||
* FSG_FS_FUNCTION_PRE_EP_ENTRIES and FSG_HS_FUNCTION_PRE_EP_ENTRIES
|
||||
* macros are not defined.
|
||||
*
|
||||
* When FSG_NO_DEVICE_STRINGS is defined FSG_STRING_MANUFACTURER,
|
||||
* FSG_STRING_PRODUCT, FSG_STRING_SERIAL and FSG_STRING_CONFIG are not
|
||||
* defined (as well as corresponding entries in string tables are
|
||||
* missing) and FSG_STRING_INTERFACE has value of zero.
|
||||
*
|
||||
* When FSG_NO_OTG is defined fsg_otg_desc won't be defined.
|
||||
*/
|
||||
|
||||
/*
|
||||
* When USB_GADGET_DEBUG_FILES is defined the module param num_buffers
|
||||
* sets the number of pipeline buffers (length of the fsg_buffhd array).
|
||||
* The valid range of num_buffers is: num >= 2 && num <= 4.
|
||||
*/
|
||||
|
||||
|
||||
#include <linux/usb/storage.h>
|
||||
#include <scsi/scsi.h>
|
||||
#include <asm/unaligned.h>
|
||||
|
||||
|
||||
/*
|
||||
* Thanks to NetChip Technologies for donating this product ID.
|
||||
*
|
||||
* DO NOT REUSE THESE IDs with any other driver!! Ever!!
|
||||
* Instead: allocate your own, using normal USB-IF procedures.
|
||||
*/
|
||||
#define FSG_VENDOR_ID 0x0525 /* NetChip */
|
||||
#define FSG_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
|
||||
#ifndef DEBUG
|
||||
#undef VERBOSE_DEBUG
|
||||
#undef DUMP_MSGS
|
||||
#endif /* !DEBUG */
|
||||
|
||||
#ifdef VERBOSE_DEBUG
|
||||
#define VLDBG LDBG
|
||||
#else
|
||||
#define VLDBG(lun, fmt, args...) do { } while (0)
|
||||
#endif /* VERBOSE_DEBUG */
|
||||
|
||||
#define LDBG(lun, fmt, args...) dev_dbg (&(lun)->dev, fmt, ## args)
|
||||
#define LERROR(lun, fmt, args...) dev_err (&(lun)->dev, fmt, ## args)
|
||||
#define LWARN(lun, fmt, args...) dev_warn(&(lun)->dev, fmt, ## args)
|
||||
#define LINFO(lun, fmt, args...) dev_info(&(lun)->dev, fmt, ## args)
|
||||
|
||||
/*
|
||||
* Keep those macros in sync with those in
|
||||
* include/linux/usb/composite.h or else GCC will complain. If they
|
||||
* are identical (the same names of arguments, white spaces in the
|
||||
* same places) GCC will allow redefinition otherwise (even if some
|
||||
* white space is removed or added) warning will be issued.
|
||||
*
|
||||
* Those macros are needed here because File Storage Gadget does not
|
||||
* include the composite.h header. For composite gadgets those macros
|
||||
* are redundant since composite.h is included any way.
|
||||
*
|
||||
* One could check whether those macros are already defined (which
|
||||
* would indicate composite.h had been included) or not (which would
|
||||
* indicate we were in FSG) but this is not done because a warning is
|
||||
* desired if definitions here differ from the ones in composite.h.
|
||||
*
|
||||
* We want the definitions to match and be the same in File Storage
|
||||
* Gadget as well as Mass Storage Function (and so composite gadgets
|
||||
* using MSF). If someone changes them in composite.h it will produce
|
||||
* a warning in this file when building MSF.
|
||||
*/
|
||||
#define DBG(d, fmt, args...) dev_dbg(&(d)->gadget->dev , fmt , ## args)
|
||||
#define VDBG(d, fmt, args...) dev_vdbg(&(d)->gadget->dev , fmt , ## args)
|
||||
#define ERROR(d, fmt, args...) dev_err(&(d)->gadget->dev , fmt , ## args)
|
||||
#define WARNING(d, fmt, args...) dev_warn(&(d)->gadget->dev , fmt , ## args)
|
||||
#define INFO(d, fmt, args...) dev_info(&(d)->gadget->dev , fmt , ## args)
|
||||
|
||||
|
||||
|
||||
#ifdef DUMP_MSGS
|
||||
|
||||
# define dump_msg(fsg, /* const char * */ label, \
|
||||
/* const u8 * */ buf, /* unsigned */ length) do { \
|
||||
if (length < 512) { \
|
||||
DBG(fsg, "%s, length %u:\n", label, length); \
|
||||
print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, \
|
||||
16, 1, buf, length, 0); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
# define dump_cdb(fsg) do { } while (0)
|
||||
|
||||
#else
|
||||
|
||||
# define dump_msg(fsg, /* const char * */ label, \
|
||||
/* const u8 * */ buf, /* unsigned */ length) do { } while (0)
|
||||
|
||||
# ifdef VERBOSE_DEBUG
|
||||
|
||||
# define dump_cdb(fsg) \
|
||||
print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE, \
|
||||
16, 1, (fsg)->cmnd, (fsg)->cmnd_size, 0) \
|
||||
|
||||
# else
|
||||
|
||||
# define dump_cdb(fsg) do { } while (0)
|
||||
|
||||
# endif /* VERBOSE_DEBUG */
|
||||
|
||||
#endif /* DUMP_MSGS */
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/* CBI Interrupt data structure */
|
||||
struct interrupt_data {
|
||||
u8 bType;
|
||||
u8 bValue;
|
||||
};
|
||||
|
||||
#define CBI_INTERRUPT_DATA_LEN 2
|
||||
|
||||
/* CBI Accept Device-Specific Command request */
|
||||
#define USB_CBI_ADSC_REQUEST 0x00
|
||||
|
||||
|
||||
/* Length of a SCSI Command Data Block */
|
||||
#define MAX_COMMAND_SIZE 16
|
||||
|
||||
/* SCSI Sense Key/Additional Sense Code/ASC Qualifier values */
|
||||
#define SS_NO_SENSE 0
|
||||
#define SS_COMMUNICATION_FAILURE 0x040800
|
||||
#define SS_INVALID_COMMAND 0x052000
|
||||
#define SS_INVALID_FIELD_IN_CDB 0x052400
|
||||
#define SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE 0x052100
|
||||
#define SS_LOGICAL_UNIT_NOT_SUPPORTED 0x052500
|
||||
#define SS_MEDIUM_NOT_PRESENT 0x023a00
|
||||
#define SS_MEDIUM_REMOVAL_PREVENTED 0x055302
|
||||
#define SS_NOT_READY_TO_READY_TRANSITION 0x062800
|
||||
#define SS_RESET_OCCURRED 0x062900
|
||||
#define SS_SAVING_PARAMETERS_NOT_SUPPORTED 0x053900
|
||||
#define SS_UNRECOVERED_READ_ERROR 0x031100
|
||||
#define SS_WRITE_ERROR 0x030c02
|
||||
#define SS_WRITE_PROTECTED 0x072700
|
||||
|
||||
#define SK(x) ((u8) ((x) >> 16)) /* Sense Key byte, etc. */
|
||||
#define ASC(x) ((u8) ((x) >> 8))
|
||||
#define ASCQ(x) ((u8) (x))
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
|
||||
struct fsg_lun {
|
||||
struct file *filp;
|
||||
loff_t file_length;
|
||||
loff_t num_sectors;
|
||||
|
||||
unsigned int initially_ro:1;
|
||||
unsigned int ro:1;
|
||||
unsigned int removable:1;
|
||||
unsigned int cdrom:1;
|
||||
unsigned int prevent_medium_removal:1;
|
||||
unsigned int registered:1;
|
||||
unsigned int info_valid:1;
|
||||
unsigned int nofua:1;
|
||||
|
||||
u32 sense_data;
|
||||
u32 sense_data_info;
|
||||
u32 unit_attention_data;
|
||||
|
||||
unsigned int blkbits; /* Bits of logical block size of bound block device */
|
||||
unsigned int blksize; /* logical block size of bound block device */
|
||||
struct device dev;
|
||||
};
|
||||
|
||||
#define fsg_lun_is_open(curlun) ((curlun)->filp != NULL)
|
||||
|
||||
static struct fsg_lun *fsg_lun_from_dev(struct device *dev)
|
||||
{
|
||||
return container_of(dev, struct fsg_lun, dev);
|
||||
}
|
||||
|
||||
|
||||
/* Big enough to hold our biggest descriptor */
|
||||
#define EP0_BUFSIZE 256
|
||||
#define DELAYED_STATUS (EP0_BUFSIZE + 999) /* An impossibly large value */
|
||||
|
||||
#ifdef CONFIG_USB_GADGET_DEBUG_FILES
|
||||
|
||||
static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS;
|
||||
module_param_named(num_buffers, fsg_num_buffers, uint, S_IRUGO);
|
||||
MODULE_PARM_DESC(num_buffers, "Number of pipeline buffers");
|
||||
|
||||
#else
|
||||
|
||||
/*
|
||||
* Number of buffers we will use.
|
||||
* 2 is usually enough for good buffering pipeline
|
||||
*/
|
||||
#define fsg_num_buffers CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS
|
||||
|
||||
#endif /* CONFIG_USB_DEBUG */
|
||||
|
||||
/* check if fsg_num_buffers is within a valid range */
|
||||
static inline int fsg_num_buffers_validate(void)
|
||||
{
|
||||
if (fsg_num_buffers >= 2 && fsg_num_buffers <= 4)
|
||||
return 0;
|
||||
pr_err("fsg_num_buffers %u is out of range (%d to %d)\n",
|
||||
fsg_num_buffers, 2 ,4);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* Default size of buffer length. */
|
||||
#define FSG_BUFLEN ((u32)16384)
|
||||
|
||||
/* Maximal number of LUNs supported in mass storage function */
|
||||
#define FSG_MAX_LUNS 8
|
||||
|
||||
enum fsg_buffer_state {
|
||||
BUF_STATE_EMPTY = 0,
|
||||
BUF_STATE_FULL,
|
||||
BUF_STATE_BUSY
|
||||
};
|
||||
|
||||
struct fsg_buffhd {
|
||||
void *buf;
|
||||
enum fsg_buffer_state state;
|
||||
struct fsg_buffhd *next;
|
||||
|
||||
/*
|
||||
* The NetChip 2280 is faster, and handles some protocol faults
|
||||
* better, if we don't submit any short bulk-out read requests.
|
||||
* So we will record the intended request length here.
|
||||
*/
|
||||
unsigned int bulk_out_intended_length;
|
||||
|
||||
struct usb_request *inreq;
|
||||
int inreq_busy;
|
||||
struct usb_request *outreq;
|
||||
int outreq_busy;
|
||||
};
|
||||
|
||||
enum fsg_state {
|
||||
/* This one isn't used anywhere */
|
||||
FSG_STATE_COMMAND_PHASE = -10,
|
||||
FSG_STATE_DATA_PHASE,
|
||||
FSG_STATE_STATUS_PHASE,
|
||||
|
||||
FSG_STATE_IDLE = 0,
|
||||
FSG_STATE_ABORT_BULK_OUT,
|
||||
FSG_STATE_RESET,
|
||||
FSG_STATE_INTERFACE_CHANGE,
|
||||
FSG_STATE_CONFIG_CHANGE,
|
||||
FSG_STATE_DISCONNECT,
|
||||
FSG_STATE_EXIT,
|
||||
FSG_STATE_TERMINATED
|
||||
};
|
||||
|
||||
enum data_direction {
|
||||
DATA_DIR_UNKNOWN = 0,
|
||||
DATA_DIR_FROM_HOST,
|
||||
DATA_DIR_TO_HOST,
|
||||
DATA_DIR_NONE
|
||||
};
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
|
||||
static inline u32 get_unaligned_be24(u8 *buf)
|
||||
{
|
||||
return 0xffffff & (u32) get_unaligned_be32(buf - 1);
|
||||
}
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
|
||||
enum {
|
||||
#ifndef FSG_NO_DEVICE_STRINGS
|
||||
FSG_STRING_MANUFACTURER = 1,
|
||||
FSG_STRING_PRODUCT,
|
||||
FSG_STRING_SERIAL,
|
||||
FSG_STRING_CONFIG,
|
||||
#endif
|
||||
FSG_STRING_INTERFACE
|
||||
};
|
||||
|
||||
|
||||
#ifndef FSG_NO_OTG
|
||||
static struct usb_otg_descriptor
|
||||
fsg_otg_desc = {
|
||||
.bLength = sizeof fsg_otg_desc,
|
||||
.bDescriptorType = USB_DT_OTG,
|
||||
|
||||
.bmAttributes = USB_OTG_SRP,
|
||||
};
|
||||
#endif
|
||||
|
||||
/* There is only one interface. */
|
||||
|
||||
static struct usb_interface_descriptor
|
||||
fsg_intf_desc = {
|
||||
.bLength = sizeof fsg_intf_desc,
|
||||
.bDescriptorType = USB_DT_INTERFACE,
|
||||
|
||||
.bNumEndpoints = 2, /* Adjusted during fsg_bind() */
|
||||
.bInterfaceClass = USB_CLASS_MASS_STORAGE,
|
||||
.bInterfaceSubClass = USB_SC_SCSI, /* Adjusted during fsg_bind() */
|
||||
.bInterfaceProtocol = USB_PR_BULK, /* Adjusted during fsg_bind() */
|
||||
.iInterface = FSG_STRING_INTERFACE,
|
||||
};
|
||||
|
||||
/*
|
||||
* Three full-speed endpoint descriptors: bulk-in, bulk-out, and
|
||||
* interrupt-in.
|
||||
*/
|
||||
|
||||
static struct usb_endpoint_descriptor
|
||||
fsg_fs_bulk_in_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
.bEndpointAddress = USB_DIR_IN,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
/* wMaxPacketSize set by autoconfiguration */
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor
|
||||
fsg_fs_bulk_out_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
.bEndpointAddress = USB_DIR_OUT,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
/* wMaxPacketSize set by autoconfiguration */
|
||||
};
|
||||
|
||||
#ifndef FSG_NO_INTR_EP
|
||||
|
||||
static struct usb_endpoint_descriptor
|
||||
fsg_fs_intr_in_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
.bEndpointAddress = USB_DIR_IN,
|
||||
.bmAttributes = USB_ENDPOINT_XFER_INT,
|
||||
.wMaxPacketSize = cpu_to_le16(2),
|
||||
.bInterval = 32, /* frames -> 32 ms */
|
||||
};
|
||||
|
||||
#ifndef FSG_NO_OTG
|
||||
# define FSG_FS_FUNCTION_PRE_EP_ENTRIES 2
|
||||
#else
|
||||
# define FSG_FS_FUNCTION_PRE_EP_ENTRIES 1
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
static struct usb_descriptor_header *fsg_fs_function[] = {
|
||||
#ifndef FSG_NO_OTG
|
||||
(struct usb_descriptor_header *) &fsg_otg_desc,
|
||||
#endif
|
||||
(struct usb_descriptor_header *) &fsg_intf_desc,
|
||||
(struct usb_descriptor_header *) &fsg_fs_bulk_in_desc,
|
||||
(struct usb_descriptor_header *) &fsg_fs_bulk_out_desc,
|
||||
#ifndef FSG_NO_INTR_EP
|
||||
(struct usb_descriptor_header *) &fsg_fs_intr_in_desc,
|
||||
#endif
|
||||
NULL,
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
* USB 2.0 devices need to expose both high speed and full speed
|
||||
* descriptors, unless they only run at full speed.
|
||||
*
|
||||
* That means alternate endpoint descriptors (bigger packets)
|
||||
* and a "device qualifier" ... plus more construction options
|
||||
* for the configuration descriptor.
|
||||
*/
|
||||
static struct usb_endpoint_descriptor
|
||||
fsg_hs_bulk_in_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
/* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
.wMaxPacketSize = cpu_to_le16(512),
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor
|
||||
fsg_hs_bulk_out_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
/* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
.wMaxPacketSize = cpu_to_le16(512),
|
||||
.bInterval = 1, /* NAK every 1 uframe */
|
||||
};
|
||||
|
||||
#ifndef FSG_NO_INTR_EP
|
||||
|
||||
static struct usb_endpoint_descriptor
|
||||
fsg_hs_intr_in_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
/* bEndpointAddress copied from fs_intr_in_desc during fsg_bind() */
|
||||
.bmAttributes = USB_ENDPOINT_XFER_INT,
|
||||
.wMaxPacketSize = cpu_to_le16(2),
|
||||
.bInterval = 9, /* 2**(9-1) = 256 uframes -> 32 ms */
|
||||
};
|
||||
|
||||
#ifndef FSG_NO_OTG
|
||||
# define FSG_HS_FUNCTION_PRE_EP_ENTRIES 2
|
||||
#else
|
||||
# define FSG_HS_FUNCTION_PRE_EP_ENTRIES 1
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
static struct usb_descriptor_header *fsg_hs_function[] = {
|
||||
#ifndef FSG_NO_OTG
|
||||
(struct usb_descriptor_header *) &fsg_otg_desc,
|
||||
#endif
|
||||
(struct usb_descriptor_header *) &fsg_intf_desc,
|
||||
(struct usb_descriptor_header *) &fsg_hs_bulk_in_desc,
|
||||
(struct usb_descriptor_header *) &fsg_hs_bulk_out_desc,
|
||||
#ifndef FSG_NO_INTR_EP
|
||||
(struct usb_descriptor_header *) &fsg_hs_intr_in_desc,
|
||||
#endif
|
||||
NULL,
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor
|
||||
fsg_ss_bulk_in_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
/* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
.wMaxPacketSize = cpu_to_le16(1024),
|
||||
};
|
||||
|
||||
static struct usb_ss_ep_comp_descriptor fsg_ss_bulk_in_comp_desc = {
|
||||
.bLength = sizeof(fsg_ss_bulk_in_comp_desc),
|
||||
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
|
||||
|
||||
/*.bMaxBurst = DYNAMIC, */
|
||||
};
|
||||
|
||||
static struct usb_endpoint_descriptor
|
||||
fsg_ss_bulk_out_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
/* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */
|
||||
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
||||
.wMaxPacketSize = cpu_to_le16(1024),
|
||||
};
|
||||
|
||||
static struct usb_ss_ep_comp_descriptor fsg_ss_bulk_out_comp_desc = {
|
||||
.bLength = sizeof(fsg_ss_bulk_in_comp_desc),
|
||||
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
|
||||
|
||||
/*.bMaxBurst = DYNAMIC, */
|
||||
};
|
||||
|
||||
#ifndef FSG_NO_INTR_EP
|
||||
|
||||
static struct usb_endpoint_descriptor
|
||||
fsg_ss_intr_in_desc = {
|
||||
.bLength = USB_DT_ENDPOINT_SIZE,
|
||||
.bDescriptorType = USB_DT_ENDPOINT,
|
||||
|
||||
/* bEndpointAddress copied from fs_intr_in_desc during fsg_bind() */
|
||||
.bmAttributes = USB_ENDPOINT_XFER_INT,
|
||||
.wMaxPacketSize = cpu_to_le16(2),
|
||||
.bInterval = 9, /* 2**(9-1) = 256 uframes -> 32 ms */
|
||||
};
|
||||
|
||||
static struct usb_ss_ep_comp_descriptor fsg_ss_intr_in_comp_desc = {
|
||||
.bLength = sizeof(fsg_ss_bulk_in_comp_desc),
|
||||
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
|
||||
|
||||
.wBytesPerInterval = cpu_to_le16(2),
|
||||
};
|
||||
|
||||
#ifndef FSG_NO_OTG
|
||||
# define FSG_SS_FUNCTION_PRE_EP_ENTRIES 2
|
||||
#else
|
||||
# define FSG_SS_FUNCTION_PRE_EP_ENTRIES 1
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
static __maybe_unused struct usb_ext_cap_descriptor fsg_ext_cap_desc = {
|
||||
.bLength = USB_DT_USB_EXT_CAP_SIZE,
|
||||
.bDescriptorType = USB_DT_DEVICE_CAPABILITY,
|
||||
.bDevCapabilityType = USB_CAP_TYPE_EXT,
|
||||
|
||||
.bmAttributes = cpu_to_le32(USB_LPM_SUPPORT),
|
||||
};
|
||||
|
||||
static __maybe_unused struct usb_ss_cap_descriptor fsg_ss_cap_desc = {
|
||||
.bLength = USB_DT_USB_SS_CAP_SIZE,
|
||||
.bDescriptorType = USB_DT_DEVICE_CAPABILITY,
|
||||
.bDevCapabilityType = USB_SS_CAP_TYPE,
|
||||
|
||||
/* .bmAttributes = LTM is not supported yet */
|
||||
|
||||
.wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION
|
||||
| USB_FULL_SPEED_OPERATION
|
||||
| USB_HIGH_SPEED_OPERATION
|
||||
| USB_5GBPS_OPERATION),
|
||||
.bFunctionalitySupport = USB_LOW_SPEED_OPERATION,
|
||||
.bU1devExitLat = USB_DEFAULT_U1_DEV_EXIT_LAT,
|
||||
.bU2DevExitLat = cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT),
|
||||
};
|
||||
|
||||
static __maybe_unused struct usb_bos_descriptor fsg_bos_desc = {
|
||||
.bLength = USB_DT_BOS_SIZE,
|
||||
.bDescriptorType = USB_DT_BOS,
|
||||
|
||||
.wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE
|
||||
+ USB_DT_USB_EXT_CAP_SIZE
|
||||
+ USB_DT_USB_SS_CAP_SIZE),
|
||||
|
||||
.bNumDeviceCaps = 2,
|
||||
};
|
||||
|
||||
static struct usb_descriptor_header *fsg_ss_function[] = {
|
||||
#ifndef FSG_NO_OTG
|
||||
(struct usb_descriptor_header *) &fsg_otg_desc,
|
||||
#endif
|
||||
(struct usb_descriptor_header *) &fsg_intf_desc,
|
||||
(struct usb_descriptor_header *) &fsg_ss_bulk_in_desc,
|
||||
(struct usb_descriptor_header *) &fsg_ss_bulk_in_comp_desc,
|
||||
(struct usb_descriptor_header *) &fsg_ss_bulk_out_desc,
|
||||
(struct usb_descriptor_header *) &fsg_ss_bulk_out_comp_desc,
|
||||
#ifndef FSG_NO_INTR_EP
|
||||
(struct usb_descriptor_header *) &fsg_ss_intr_in_desc,
|
||||
(struct usb_descriptor_header *) &fsg_ss_intr_in_comp_desc,
|
||||
#endif
|
||||
NULL,
|
||||
};
|
||||
|
||||
/* Maxpacket and other transfer characteristics vary by speed. */
|
||||
static __maybe_unused struct usb_endpoint_descriptor *
|
||||
fsg_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
|
||||
struct usb_endpoint_descriptor *hs,
|
||||
struct usb_endpoint_descriptor *ss)
|
||||
{
|
||||
if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
|
||||
return ss;
|
||||
else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
|
||||
return hs;
|
||||
return fs;
|
||||
}
|
||||
|
||||
|
||||
/* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */
|
||||
static struct usb_string fsg_strings[] = {
|
||||
#ifndef FSG_NO_DEVICE_STRINGS
|
||||
{FSG_STRING_MANUFACTURER, fsg_string_manufacturer},
|
||||
{FSG_STRING_PRODUCT, fsg_string_product},
|
||||
{FSG_STRING_SERIAL, ""},
|
||||
{FSG_STRING_CONFIG, fsg_string_config},
|
||||
#endif
|
||||
{FSG_STRING_INTERFACE, fsg_string_interface},
|
||||
{}
|
||||
};
|
||||
|
||||
static struct usb_gadget_strings fsg_stringtab = {
|
||||
.language = 0x0409, /* en-us */
|
||||
.strings = fsg_strings,
|
||||
};
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* If the next two routines are called while the gadget is registered,
|
||||
* the caller must own fsg->filesem for writing.
|
||||
*/
|
||||
|
||||
static void fsg_lun_close(struct fsg_lun *curlun)
|
||||
{
|
||||
if (curlun->filp) {
|
||||
LDBG(curlun, "close backing file\n");
|
||||
fput(curlun->filp);
|
||||
curlun->filp = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int fsg_lun_open(struct fsg_lun *curlun, const char *filename)
|
||||
{
|
||||
int ro;
|
||||
struct file *filp = NULL;
|
||||
int rc = -EINVAL;
|
||||
struct inode *inode = NULL;
|
||||
loff_t size;
|
||||
loff_t num_sectors;
|
||||
loff_t min_sectors;
|
||||
unsigned int blkbits;
|
||||
unsigned int blksize;
|
||||
|
||||
/* R/W if we can, R/O if we must */
|
||||
ro = curlun->initially_ro;
|
||||
if (!ro) {
|
||||
filp = filp_open(filename, O_RDWR | O_LARGEFILE, 0);
|
||||
if (PTR_ERR(filp) == -EROFS || PTR_ERR(filp) == -EACCES)
|
||||
ro = 1;
|
||||
}
|
||||
if (ro)
|
||||
filp = filp_open(filename, O_RDONLY | O_LARGEFILE, 0);
|
||||
if (IS_ERR(filp)) {
|
||||
LINFO(curlun, "unable to open backing file: %s\n", filename);
|
||||
return PTR_ERR(filp);
|
||||
}
|
||||
|
||||
if (!(filp->f_mode & FMODE_WRITE))
|
||||
ro = 1;
|
||||
|
||||
inode = filp->f_path.dentry->d_inode;
|
||||
if ((!S_ISREG(inode->i_mode) && !S_ISBLK(inode->i_mode))) {
|
||||
LINFO(curlun, "invalid file type: %s\n", filename);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* If we can't read the file, it's no good.
|
||||
* If we can't write the file, use it read-only.
|
||||
*/
|
||||
if (!(filp->f_op->read || filp->f_op->aio_read)) {
|
||||
LINFO(curlun, "file not readable: %s\n", filename);
|
||||
goto out;
|
||||
}
|
||||
if (!(filp->f_op->write || filp->f_op->aio_write))
|
||||
ro = 1;
|
||||
|
||||
size = i_size_read(inode->i_mapping->host);
|
||||
if (size < 0) {
|
||||
LINFO(curlun, "unable to find file size: %s\n", filename);
|
||||
rc = (int) size;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (curlun->cdrom) {
|
||||
blksize = 2048;
|
||||
blkbits = 11;
|
||||
} else if (inode->i_bdev) {
|
||||
blksize = bdev_logical_block_size(inode->i_bdev);
|
||||
blkbits = blksize_bits(blksize);
|
||||
} else {
|
||||
blksize = 512;
|
||||
blkbits = 9;
|
||||
}
|
||||
|
||||
num_sectors = size >> blkbits; /* File size in logic-block-size blocks */
|
||||
min_sectors = 1;
|
||||
if (curlun->cdrom) {
|
||||
min_sectors = 300; /* Smallest track is 300 frames */
|
||||
if (num_sectors >= 256*60*75) {
|
||||
num_sectors = 256*60*75 - 1;
|
||||
LINFO(curlun, "file too big: %s\n", filename);
|
||||
LINFO(curlun, "using only first %d blocks\n",
|
||||
(int) num_sectors);
|
||||
}
|
||||
}
|
||||
if (num_sectors < min_sectors) {
|
||||
LINFO(curlun, "file too small: %s\n", filename);
|
||||
rc = -ETOOSMALL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (fsg_lun_is_open(curlun))
|
||||
fsg_lun_close(curlun);
|
||||
|
||||
curlun->blksize = blksize;
|
||||
curlun->blkbits = blkbits;
|
||||
curlun->ro = ro;
|
||||
curlun->filp = filp;
|
||||
curlun->file_length = size;
|
||||
curlun->num_sectors = num_sectors;
|
||||
LDBG(curlun, "open backing file: %s\n", filename);
|
||||
return 0;
|
||||
|
||||
out:
|
||||
fput(filp);
|
||||
return rc;
|
||||
}
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/*
|
||||
* Sync the file data, don't bother with the metadata.
|
||||
* This code was copied from fs/buffer.c:sys_fdatasync().
|
||||
*/
|
||||
static int fsg_lun_fsync_sub(struct fsg_lun *curlun)
|
||||
{
|
||||
struct file *filp = curlun->filp;
|
||||
|
||||
if (curlun->ro || !filp)
|
||||
return 0;
|
||||
return vfs_fsync(filp, 1);
|
||||
}
|
||||
|
||||
static void store_cdrom_address(u8 *dest, int msf, u32 addr)
|
||||
{
|
||||
if (msf) {
|
||||
/* Convert to Minutes-Seconds-Frames */
|
||||
addr >>= 2; /* Convert to 2048-byte frames */
|
||||
addr += 2*75; /* Lead-in occupies 2 seconds */
|
||||
dest[3] = addr % 75; /* Frames */
|
||||
addr /= 75;
|
||||
dest[2] = addr % 60; /* Seconds */
|
||||
addr /= 60;
|
||||
dest[1] = addr; /* Minutes */
|
||||
dest[0] = 0; /* Reserved */
|
||||
} else {
|
||||
/* Absolute sector */
|
||||
put_unaligned_be32(addr, dest);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
|
||||
static ssize_t fsg_show_ro(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct fsg_lun *curlun = fsg_lun_from_dev(dev);
|
||||
|
||||
return sprintf(buf, "%d\n", fsg_lun_is_open(curlun)
|
||||
? curlun->ro
|
||||
: curlun->initially_ro);
|
||||
}
|
||||
|
||||
static ssize_t fsg_show_nofua(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct fsg_lun *curlun = fsg_lun_from_dev(dev);
|
||||
|
||||
return sprintf(buf, "%u\n", curlun->nofua);
|
||||
}
|
||||
|
||||
static ssize_t fsg_show_file(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct fsg_lun *curlun = fsg_lun_from_dev(dev);
|
||||
struct rw_semaphore *filesem = dev_get_drvdata(dev);
|
||||
char *p;
|
||||
ssize_t rc;
|
||||
|
||||
down_read(filesem);
|
||||
if (fsg_lun_is_open(curlun)) { /* Get the complete pathname */
|
||||
p = d_path(&curlun->filp->f_path, buf, PAGE_SIZE - 1);
|
||||
if (IS_ERR(p))
|
||||
rc = PTR_ERR(p);
|
||||
else {
|
||||
rc = strlen(p);
|
||||
memmove(buf, p, rc);
|
||||
buf[rc] = '\n'; /* Add a newline */
|
||||
buf[++rc] = 0;
|
||||
}
|
||||
} else { /* No file, return 0 bytes */
|
||||
*buf = 0;
|
||||
rc = 0;
|
||||
}
|
||||
up_read(filesem);
|
||||
return rc;
|
||||
}
|
||||
|
||||
|
||||
static ssize_t fsg_store_ro(struct device *dev, struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
ssize_t rc;
|
||||
struct fsg_lun *curlun = fsg_lun_from_dev(dev);
|
||||
struct rw_semaphore *filesem = dev_get_drvdata(dev);
|
||||
unsigned ro;
|
||||
|
||||
rc = kstrtouint(buf, 2, &ro);
|
||||
if (rc)
|
||||
return rc;
|
||||
|
||||
/*
|
||||
* Allow the write-enable status to change only while the
|
||||
* backing file is closed.
|
||||
*/
|
||||
down_read(filesem);
|
||||
if (fsg_lun_is_open(curlun)) {
|
||||
LDBG(curlun, "read-only status change prevented\n");
|
||||
rc = -EBUSY;
|
||||
} else {
|
||||
curlun->ro = ro;
|
||||
curlun->initially_ro = ro;
|
||||
LDBG(curlun, "read-only status set to %d\n", curlun->ro);
|
||||
rc = count;
|
||||
}
|
||||
up_read(filesem);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static ssize_t fsg_store_nofua(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct fsg_lun *curlun = fsg_lun_from_dev(dev);
|
||||
unsigned nofua;
|
||||
int ret;
|
||||
|
||||
ret = kstrtouint(buf, 2, &nofua);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* Sync data when switching from async mode to sync */
|
||||
if (!nofua && curlun->nofua)
|
||||
fsg_lun_fsync_sub(curlun);
|
||||
|
||||
curlun->nofua = nofua;
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static ssize_t fsg_store_file(struct device *dev, struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct fsg_lun *curlun = fsg_lun_from_dev(dev);
|
||||
struct rw_semaphore *filesem = dev_get_drvdata(dev);
|
||||
int rc = 0;
|
||||
|
||||
if (curlun->prevent_medium_removal && fsg_lun_is_open(curlun)) {
|
||||
LDBG(curlun, "eject attempt prevented\n");
|
||||
return -EBUSY; /* "Door is locked" */
|
||||
}
|
||||
|
||||
/* Remove a trailing newline */
|
||||
if (count > 0 && buf[count-1] == '\n')
|
||||
((char *) buf)[count-1] = 0; /* Ugh! */
|
||||
|
||||
/* Load new medium */
|
||||
down_write(filesem);
|
||||
if (count > 0 && buf[0]) {
|
||||
/* fsg_lun_open() will close existing file if any. */
|
||||
rc = fsg_lun_open(curlun, buf);
|
||||
if (rc == 0)
|
||||
curlun->unit_attention_data =
|
||||
SS_NOT_READY_TO_READY_TRANSITION;
|
||||
} else if (fsg_lun_is_open(curlun)) {
|
||||
fsg_lun_close(curlun);
|
||||
curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT;
|
||||
}
|
||||
up_write(filesem);
|
||||
return (rc < 0 ? rc : count);
|
||||
}
|
||||
986
drivers/staging/ccg/u_ether.c
Normal file
986
drivers/staging/ccg/u_ether.c
Normal file
|
|
@ -0,0 +1,986 @@
|
|||
/*
|
||||
* u_ether.c -- Ethernet-over-USB link layer utilities for Gadget stack
|
||||
*
|
||||
* Copyright (C) 2003-2005,2008 David Brownell
|
||||
* Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
|
||||
* Copyright (C) 2008 Nokia Corporation
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*/
|
||||
|
||||
/* #define VERBOSE_DEBUG */
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/gfp.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/ctype.h>
|
||||
#include <linux/etherdevice.h>
|
||||
#include <linux/ethtool.h>
|
||||
|
||||
#include "u_ether.h"
|
||||
|
||||
|
||||
/*
|
||||
* This component encapsulates the Ethernet link glue needed to provide
|
||||
* one (!) network link through the USB gadget stack, normally "usb0".
|
||||
*
|
||||
* The control and data models are handled by the function driver which
|
||||
* connects to this code; such as CDC Ethernet (ECM or EEM),
|
||||
* "CDC Subset", or RNDIS. That includes all descriptor and endpoint
|
||||
* management.
|
||||
*
|
||||
* Link level addressing is handled by this component using module
|
||||
* parameters; if no such parameters are provided, random link level
|
||||
* addresses are used. Each end of the link uses one address. The
|
||||
* host end address is exported in various ways, and is often recorded
|
||||
* in configuration databases.
|
||||
*
|
||||
* The driver which assembles each configuration using such a link is
|
||||
* responsible for ensuring that each configuration includes at most one
|
||||
* instance of is network link. (The network layer provides ways for
|
||||
* this single "physical" link to be used by multiple virtual links.)
|
||||
*/
|
||||
|
||||
#define UETH__VERSION "29-May-2008"
|
||||
|
||||
struct eth_dev {
|
||||
/* lock is held while accessing port_usb
|
||||
* or updating its backlink port_usb->ioport
|
||||
*/
|
||||
spinlock_t lock;
|
||||
struct gether *port_usb;
|
||||
|
||||
struct net_device *net;
|
||||
struct usb_gadget *gadget;
|
||||
|
||||
spinlock_t req_lock; /* guard {rx,tx}_reqs */
|
||||
struct list_head tx_reqs, rx_reqs;
|
||||
atomic_t tx_qlen;
|
||||
|
||||
struct sk_buff_head rx_frames;
|
||||
|
||||
unsigned header_len;
|
||||
struct sk_buff *(*wrap)(struct gether *, struct sk_buff *skb);
|
||||
int (*unwrap)(struct gether *,
|
||||
struct sk_buff *skb,
|
||||
struct sk_buff_head *list);
|
||||
|
||||
struct work_struct work;
|
||||
|
||||
unsigned long todo;
|
||||
#define WORK_RX_MEMORY 0
|
||||
|
||||
bool zlp;
|
||||
u8 host_mac[ETH_ALEN];
|
||||
};
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
#define RX_EXTRA 20 /* bytes guarding against rx overflows */
|
||||
|
||||
#define DEFAULT_QLEN 2 /* double buffering by default */
|
||||
|
||||
static unsigned qmult = 5;
|
||||
module_param(qmult, uint, S_IRUGO|S_IWUSR);
|
||||
MODULE_PARM_DESC(qmult, "queue length multiplier at high/super speed");
|
||||
|
||||
/* for dual-speed hardware, use deeper queues at high/super speed */
|
||||
static inline int qlen(struct usb_gadget *gadget)
|
||||
{
|
||||
if (gadget_is_dualspeed(gadget) && (gadget->speed == USB_SPEED_HIGH ||
|
||||
gadget->speed == USB_SPEED_SUPER))
|
||||
return qmult * DEFAULT_QLEN;
|
||||
else
|
||||
return DEFAULT_QLEN;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/* REVISIT there must be a better way than having two sets
|
||||
* of debug calls ...
|
||||
*/
|
||||
|
||||
#undef DBG
|
||||
#undef VDBG
|
||||
#undef ERROR
|
||||
#undef INFO
|
||||
|
||||
#define xprintk(d, level, fmt, args...) \
|
||||
printk(level "%s: " fmt , (d)->net->name , ## args)
|
||||
|
||||
#ifdef DEBUG
|
||||
#undef DEBUG
|
||||
#define DBG(dev, fmt, args...) \
|
||||
xprintk(dev , KERN_DEBUG , fmt , ## args)
|
||||
#else
|
||||
#define DBG(dev, fmt, args...) \
|
||||
do { } while (0)
|
||||
#endif /* DEBUG */
|
||||
|
||||
#ifdef VERBOSE_DEBUG
|
||||
#define VDBG DBG
|
||||
#else
|
||||
#define VDBG(dev, fmt, args...) \
|
||||
do { } while (0)
|
||||
#endif /* DEBUG */
|
||||
|
||||
#define ERROR(dev, fmt, args...) \
|
||||
xprintk(dev , KERN_ERR , fmt , ## args)
|
||||
#define INFO(dev, fmt, args...) \
|
||||
xprintk(dev , KERN_INFO , fmt , ## args)
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/* NETWORK DRIVER HOOKUP (to the layer above this driver) */
|
||||
|
||||
static int ueth_change_mtu(struct net_device *net, int new_mtu)
|
||||
{
|
||||
struct eth_dev *dev = netdev_priv(net);
|
||||
unsigned long flags;
|
||||
int status = 0;
|
||||
|
||||
/* don't change MTU on "live" link (peer won't know) */
|
||||
spin_lock_irqsave(&dev->lock, flags);
|
||||
if (dev->port_usb)
|
||||
status = -EBUSY;
|
||||
else if (new_mtu <= ETH_HLEN || new_mtu > ETH_FRAME_LEN)
|
||||
status = -ERANGE;
|
||||
else
|
||||
net->mtu = new_mtu;
|
||||
spin_unlock_irqrestore(&dev->lock, flags);
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p)
|
||||
{
|
||||
struct eth_dev *dev = netdev_priv(net);
|
||||
|
||||
strlcpy(p->driver, "g_ether", sizeof p->driver);
|
||||
strlcpy(p->version, UETH__VERSION, sizeof p->version);
|
||||
strlcpy(p->fw_version, dev->gadget->name, sizeof p->fw_version);
|
||||
strlcpy(p->bus_info, dev_name(&dev->gadget->dev), sizeof p->bus_info);
|
||||
}
|
||||
|
||||
/* REVISIT can also support:
|
||||
* - WOL (by tracking suspends and issuing remote wakeup)
|
||||
* - msglevel (implies updated messaging)
|
||||
* - ... probably more ethtool ops
|
||||
*/
|
||||
|
||||
static const struct ethtool_ops ops = {
|
||||
.get_drvinfo = eth_get_drvinfo,
|
||||
.get_link = ethtool_op_get_link,
|
||||
};
|
||||
|
||||
static void defer_kevent(struct eth_dev *dev, int flag)
|
||||
{
|
||||
if (test_and_set_bit(flag, &dev->todo))
|
||||
return;
|
||||
if (!schedule_work(&dev->work))
|
||||
ERROR(dev, "kevent %d may have been dropped\n", flag);
|
||||
else
|
||||
DBG(dev, "kevent %d scheduled\n", flag);
|
||||
}
|
||||
|
||||
static void rx_complete(struct usb_ep *ep, struct usb_request *req);
|
||||
|
||||
static int
|
||||
rx_submit(struct eth_dev *dev, struct usb_request *req, gfp_t gfp_flags)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
int retval = -ENOMEM;
|
||||
size_t size = 0;
|
||||
struct usb_ep *out;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&dev->lock, flags);
|
||||
if (dev->port_usb)
|
||||
out = dev->port_usb->out_ep;
|
||||
else
|
||||
out = NULL;
|
||||
spin_unlock_irqrestore(&dev->lock, flags);
|
||||
|
||||
if (!out)
|
||||
return -ENOTCONN;
|
||||
|
||||
|
||||
/* Padding up to RX_EXTRA handles minor disagreements with host.
|
||||
* Normally we use the USB "terminate on short read" convention;
|
||||
* so allow up to (N*maxpacket), since that memory is normally
|
||||
* already allocated. Some hardware doesn't deal well with short
|
||||
* reads (e.g. DMA must be N*maxpacket), so for now don't trim a
|
||||
* byte off the end (to force hardware errors on overflow).
|
||||
*
|
||||
* RNDIS uses internal framing, and explicitly allows senders to
|
||||
* pad to end-of-packet. That's potentially nice for speed, but
|
||||
* means receivers can't recover lost synch on their own (because
|
||||
* new packets don't only start after a short RX).
|
||||
*/
|
||||
size += sizeof(struct ethhdr) + dev->net->mtu + RX_EXTRA;
|
||||
size += dev->port_usb->header_len;
|
||||
size += out->maxpacket - 1;
|
||||
size -= size % out->maxpacket;
|
||||
|
||||
if (dev->port_usb->is_fixed)
|
||||
size = max_t(size_t, size, dev->port_usb->fixed_out_len);
|
||||
|
||||
skb = alloc_skb(size + NET_IP_ALIGN, gfp_flags);
|
||||
if (skb == NULL) {
|
||||
DBG(dev, "no rx skb\n");
|
||||
goto enomem;
|
||||
}
|
||||
|
||||
/* Some platforms perform better when IP packets are aligned,
|
||||
* but on at least one, checksumming fails otherwise. Note:
|
||||
* RNDIS headers involve variable numbers of LE32 values.
|
||||
*/
|
||||
skb_reserve(skb, NET_IP_ALIGN);
|
||||
|
||||
req->buf = skb->data;
|
||||
req->length = size;
|
||||
req->complete = rx_complete;
|
||||
req->context = skb;
|
||||
|
||||
retval = usb_ep_queue(out, req, gfp_flags);
|
||||
if (retval == -ENOMEM)
|
||||
enomem:
|
||||
defer_kevent(dev, WORK_RX_MEMORY);
|
||||
if (retval) {
|
||||
DBG(dev, "rx submit --> %d\n", retval);
|
||||
if (skb)
|
||||
dev_kfree_skb_any(skb);
|
||||
spin_lock_irqsave(&dev->req_lock, flags);
|
||||
list_add(&req->list, &dev->rx_reqs);
|
||||
spin_unlock_irqrestore(&dev->req_lock, flags);
|
||||
}
|
||||
return retval;
|
||||
}
|
||||
|
||||
static void rx_complete(struct usb_ep *ep, struct usb_request *req)
|
||||
{
|
||||
struct sk_buff *skb = req->context, *skb2;
|
||||
struct eth_dev *dev = ep->driver_data;
|
||||
int status = req->status;
|
||||
|
||||
switch (status) {
|
||||
|
||||
/* normal completion */
|
||||
case 0:
|
||||
skb_put(skb, req->actual);
|
||||
|
||||
if (dev->unwrap) {
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&dev->lock, flags);
|
||||
if (dev->port_usb) {
|
||||
status = dev->unwrap(dev->port_usb,
|
||||
skb,
|
||||
&dev->rx_frames);
|
||||
} else {
|
||||
dev_kfree_skb_any(skb);
|
||||
status = -ENOTCONN;
|
||||
}
|
||||
spin_unlock_irqrestore(&dev->lock, flags);
|
||||
} else {
|
||||
skb_queue_tail(&dev->rx_frames, skb);
|
||||
}
|
||||
skb = NULL;
|
||||
|
||||
skb2 = skb_dequeue(&dev->rx_frames);
|
||||
while (skb2) {
|
||||
if (status < 0
|
||||
|| ETH_HLEN > skb2->len
|
||||
|| skb2->len > ETH_FRAME_LEN) {
|
||||
dev->net->stats.rx_errors++;
|
||||
dev->net->stats.rx_length_errors++;
|
||||
DBG(dev, "rx length %d\n", skb2->len);
|
||||
dev_kfree_skb_any(skb2);
|
||||
goto next_frame;
|
||||
}
|
||||
skb2->protocol = eth_type_trans(skb2, dev->net);
|
||||
dev->net->stats.rx_packets++;
|
||||
dev->net->stats.rx_bytes += skb2->len;
|
||||
|
||||
/* no buffer copies needed, unless hardware can't
|
||||
* use skb buffers.
|
||||
*/
|
||||
status = netif_rx(skb2);
|
||||
next_frame:
|
||||
skb2 = skb_dequeue(&dev->rx_frames);
|
||||
}
|
||||
break;
|
||||
|
||||
/* software-driven interface shutdown */
|
||||
case -ECONNRESET: /* unlink */
|
||||
case -ESHUTDOWN: /* disconnect etc */
|
||||
VDBG(dev, "rx shutdown, code %d\n", status);
|
||||
goto quiesce;
|
||||
|
||||
/* for hardware automagic (such as pxa) */
|
||||
case -ECONNABORTED: /* endpoint reset */
|
||||
DBG(dev, "rx %s reset\n", ep->name);
|
||||
defer_kevent(dev, WORK_RX_MEMORY);
|
||||
quiesce:
|
||||
dev_kfree_skb_any(skb);
|
||||
goto clean;
|
||||
|
||||
/* data overrun */
|
||||
case -EOVERFLOW:
|
||||
dev->net->stats.rx_over_errors++;
|
||||
/* FALLTHROUGH */
|
||||
|
||||
default:
|
||||
dev->net->stats.rx_errors++;
|
||||
DBG(dev, "rx status %d\n", status);
|
||||
break;
|
||||
}
|
||||
|
||||
if (skb)
|
||||
dev_kfree_skb_any(skb);
|
||||
if (!netif_running(dev->net)) {
|
||||
clean:
|
||||
spin_lock(&dev->req_lock);
|
||||
list_add(&req->list, &dev->rx_reqs);
|
||||
spin_unlock(&dev->req_lock);
|
||||
req = NULL;
|
||||
}
|
||||
if (req)
|
||||
rx_submit(dev, req, GFP_ATOMIC);
|
||||
}
|
||||
|
||||
static int prealloc(struct list_head *list, struct usb_ep *ep, unsigned n)
|
||||
{
|
||||
unsigned i;
|
||||
struct usb_request *req;
|
||||
|
||||
if (!n)
|
||||
return -ENOMEM;
|
||||
|
||||
/* queue/recycle up to N requests */
|
||||
i = n;
|
||||
list_for_each_entry(req, list, list) {
|
||||
if (i-- == 0)
|
||||
goto extra;
|
||||
}
|
||||
while (i--) {
|
||||
req = usb_ep_alloc_request(ep, GFP_ATOMIC);
|
||||
if (!req)
|
||||
return list_empty(list) ? -ENOMEM : 0;
|
||||
list_add(&req->list, list);
|
||||
}
|
||||
return 0;
|
||||
|
||||
extra:
|
||||
/* free extras */
|
||||
for (;;) {
|
||||
struct list_head *next;
|
||||
|
||||
next = req->list.next;
|
||||
list_del(&req->list);
|
||||
usb_ep_free_request(ep, req);
|
||||
|
||||
if (next == list)
|
||||
break;
|
||||
|
||||
req = container_of(next, struct usb_request, list);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int alloc_requests(struct eth_dev *dev, struct gether *link, unsigned n)
|
||||
{
|
||||
int status;
|
||||
|
||||
spin_lock(&dev->req_lock);
|
||||
status = prealloc(&dev->tx_reqs, link->in_ep, n);
|
||||
if (status < 0)
|
||||
goto fail;
|
||||
status = prealloc(&dev->rx_reqs, link->out_ep, n);
|
||||
if (status < 0)
|
||||
goto fail;
|
||||
goto done;
|
||||
fail:
|
||||
DBG(dev, "can't alloc requests\n");
|
||||
done:
|
||||
spin_unlock(&dev->req_lock);
|
||||
return status;
|
||||
}
|
||||
|
||||
static void rx_fill(struct eth_dev *dev, gfp_t gfp_flags)
|
||||
{
|
||||
struct usb_request *req;
|
||||
unsigned long flags;
|
||||
|
||||
/* fill unused rxq slots with some skb */
|
||||
spin_lock_irqsave(&dev->req_lock, flags);
|
||||
while (!list_empty(&dev->rx_reqs)) {
|
||||
req = container_of(dev->rx_reqs.next,
|
||||
struct usb_request, list);
|
||||
list_del_init(&req->list);
|
||||
spin_unlock_irqrestore(&dev->req_lock, flags);
|
||||
|
||||
if (rx_submit(dev, req, gfp_flags) < 0) {
|
||||
defer_kevent(dev, WORK_RX_MEMORY);
|
||||
return;
|
||||
}
|
||||
|
||||
spin_lock_irqsave(&dev->req_lock, flags);
|
||||
}
|
||||
spin_unlock_irqrestore(&dev->req_lock, flags);
|
||||
}
|
||||
|
||||
static void eth_work(struct work_struct *work)
|
||||
{
|
||||
struct eth_dev *dev = container_of(work, struct eth_dev, work);
|
||||
|
||||
if (test_and_clear_bit(WORK_RX_MEMORY, &dev->todo)) {
|
||||
if (netif_running(dev->net))
|
||||
rx_fill(dev, GFP_KERNEL);
|
||||
}
|
||||
|
||||
if (dev->todo)
|
||||
DBG(dev, "work done, flags = 0x%lx\n", dev->todo);
|
||||
}
|
||||
|
||||
static void tx_complete(struct usb_ep *ep, struct usb_request *req)
|
||||
{
|
||||
struct sk_buff *skb = req->context;
|
||||
struct eth_dev *dev = ep->driver_data;
|
||||
|
||||
switch (req->status) {
|
||||
default:
|
||||
dev->net->stats.tx_errors++;
|
||||
VDBG(dev, "tx err %d\n", req->status);
|
||||
/* FALLTHROUGH */
|
||||
case -ECONNRESET: /* unlink */
|
||||
case -ESHUTDOWN: /* disconnect etc */
|
||||
break;
|
||||
case 0:
|
||||
dev->net->stats.tx_bytes += skb->len;
|
||||
}
|
||||
dev->net->stats.tx_packets++;
|
||||
|
||||
spin_lock(&dev->req_lock);
|
||||
list_add(&req->list, &dev->tx_reqs);
|
||||
spin_unlock(&dev->req_lock);
|
||||
dev_kfree_skb_any(skb);
|
||||
|
||||
atomic_dec(&dev->tx_qlen);
|
||||
if (netif_carrier_ok(dev->net))
|
||||
netif_wake_queue(dev->net);
|
||||
}
|
||||
|
||||
static inline int is_promisc(u16 cdc_filter)
|
||||
{
|
||||
return cdc_filter & USB_CDC_PACKET_TYPE_PROMISCUOUS;
|
||||
}
|
||||
|
||||
static netdev_tx_t eth_start_xmit(struct sk_buff *skb,
|
||||
struct net_device *net)
|
||||
{
|
||||
struct eth_dev *dev = netdev_priv(net);
|
||||
int length = skb->len;
|
||||
int retval;
|
||||
struct usb_request *req = NULL;
|
||||
unsigned long flags;
|
||||
struct usb_ep *in;
|
||||
u16 cdc_filter;
|
||||
|
||||
spin_lock_irqsave(&dev->lock, flags);
|
||||
if (dev->port_usb) {
|
||||
in = dev->port_usb->in_ep;
|
||||
cdc_filter = dev->port_usb->cdc_filter;
|
||||
} else {
|
||||
in = NULL;
|
||||
cdc_filter = 0;
|
||||
}
|
||||
spin_unlock_irqrestore(&dev->lock, flags);
|
||||
|
||||
if (!in) {
|
||||
dev_kfree_skb_any(skb);
|
||||
return NETDEV_TX_OK;
|
||||
}
|
||||
|
||||
/* apply outgoing CDC or RNDIS filters */
|
||||
if (!is_promisc(cdc_filter)) {
|
||||
u8 *dest = skb->data;
|
||||
|
||||
if (is_multicast_ether_addr(dest)) {
|
||||
u16 type;
|
||||
|
||||
/* ignores USB_CDC_PACKET_TYPE_MULTICAST and host
|
||||
* SET_ETHERNET_MULTICAST_FILTERS requests
|
||||
*/
|
||||
if (is_broadcast_ether_addr(dest))
|
||||
type = USB_CDC_PACKET_TYPE_BROADCAST;
|
||||
else
|
||||
type = USB_CDC_PACKET_TYPE_ALL_MULTICAST;
|
||||
if (!(cdc_filter & type)) {
|
||||
dev_kfree_skb_any(skb);
|
||||
return NETDEV_TX_OK;
|
||||
}
|
||||
}
|
||||
/* ignores USB_CDC_PACKET_TYPE_DIRECTED */
|
||||
}
|
||||
|
||||
spin_lock_irqsave(&dev->req_lock, flags);
|
||||
/*
|
||||
* this freelist can be empty if an interrupt triggered disconnect()
|
||||
* and reconfigured the gadget (shutting down this queue) after the
|
||||
* network stack decided to xmit but before we got the spinlock.
|
||||
*/
|
||||
if (list_empty(&dev->tx_reqs)) {
|
||||
spin_unlock_irqrestore(&dev->req_lock, flags);
|
||||
return NETDEV_TX_BUSY;
|
||||
}
|
||||
|
||||
req = container_of(dev->tx_reqs.next, struct usb_request, list);
|
||||
list_del(&req->list);
|
||||
|
||||
/* temporarily stop TX queue when the freelist empties */
|
||||
if (list_empty(&dev->tx_reqs))
|
||||
netif_stop_queue(net);
|
||||
spin_unlock_irqrestore(&dev->req_lock, flags);
|
||||
|
||||
/* no buffer copies needed, unless the network stack did it
|
||||
* or the hardware can't use skb buffers.
|
||||
* or there's not enough space for extra headers we need
|
||||
*/
|
||||
if (dev->wrap) {
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&dev->lock, flags);
|
||||
if (dev->port_usb)
|
||||
skb = dev->wrap(dev->port_usb, skb);
|
||||
spin_unlock_irqrestore(&dev->lock, flags);
|
||||
if (!skb)
|
||||
goto drop;
|
||||
|
||||
length = skb->len;
|
||||
}
|
||||
req->buf = skb->data;
|
||||
req->context = skb;
|
||||
req->complete = tx_complete;
|
||||
|
||||
/* NCM requires no zlp if transfer is dwNtbInMaxSize */
|
||||
if (dev->port_usb->is_fixed &&
|
||||
length == dev->port_usb->fixed_in_len &&
|
||||
(length % in->maxpacket) == 0)
|
||||
req->zero = 0;
|
||||
else
|
||||
req->zero = 1;
|
||||
|
||||
/* use zlp framing on tx for strict CDC-Ether conformance,
|
||||
* though any robust network rx path ignores extra padding.
|
||||
* and some hardware doesn't like to write zlps.
|
||||
*/
|
||||
if (req->zero && !dev->zlp && (length % in->maxpacket) == 0)
|
||||
length++;
|
||||
|
||||
req->length = length;
|
||||
|
||||
/* throttle high/super speed IRQ rate back slightly */
|
||||
if (gadget_is_dualspeed(dev->gadget))
|
||||
req->no_interrupt = (dev->gadget->speed == USB_SPEED_HIGH ||
|
||||
dev->gadget->speed == USB_SPEED_SUPER)
|
||||
? ((atomic_read(&dev->tx_qlen) % qmult) != 0)
|
||||
: 0;
|
||||
|
||||
retval = usb_ep_queue(in, req, GFP_ATOMIC);
|
||||
switch (retval) {
|
||||
default:
|
||||
DBG(dev, "tx queue err %d\n", retval);
|
||||
break;
|
||||
case 0:
|
||||
net->trans_start = jiffies;
|
||||
atomic_inc(&dev->tx_qlen);
|
||||
}
|
||||
|
||||
if (retval) {
|
||||
dev_kfree_skb_any(skb);
|
||||
drop:
|
||||
dev->net->stats.tx_dropped++;
|
||||
spin_lock_irqsave(&dev->req_lock, flags);
|
||||
if (list_empty(&dev->tx_reqs))
|
||||
netif_start_queue(net);
|
||||
list_add(&req->list, &dev->tx_reqs);
|
||||
spin_unlock_irqrestore(&dev->req_lock, flags);
|
||||
}
|
||||
return NETDEV_TX_OK;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
static void eth_start(struct eth_dev *dev, gfp_t gfp_flags)
|
||||
{
|
||||
DBG(dev, "%s\n", __func__);
|
||||
|
||||
/* fill the rx queue */
|
||||
rx_fill(dev, gfp_flags);
|
||||
|
||||
/* and open the tx floodgates */
|
||||
atomic_set(&dev->tx_qlen, 0);
|
||||
netif_wake_queue(dev->net);
|
||||
}
|
||||
|
||||
static int eth_open(struct net_device *net)
|
||||
{
|
||||
struct eth_dev *dev = netdev_priv(net);
|
||||
struct gether *link;
|
||||
|
||||
DBG(dev, "%s\n", __func__);
|
||||
if (netif_carrier_ok(dev->net))
|
||||
eth_start(dev, GFP_KERNEL);
|
||||
|
||||
spin_lock_irq(&dev->lock);
|
||||
link = dev->port_usb;
|
||||
if (link && link->open)
|
||||
link->open(link);
|
||||
spin_unlock_irq(&dev->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int eth_stop(struct net_device *net)
|
||||
{
|
||||
struct eth_dev *dev = netdev_priv(net);
|
||||
unsigned long flags;
|
||||
|
||||
VDBG(dev, "%s\n", __func__);
|
||||
netif_stop_queue(net);
|
||||
|
||||
DBG(dev, "stop stats: rx/tx %ld/%ld, errs %ld/%ld\n",
|
||||
dev->net->stats.rx_packets, dev->net->stats.tx_packets,
|
||||
dev->net->stats.rx_errors, dev->net->stats.tx_errors
|
||||
);
|
||||
|
||||
/* ensure there are no more active requests */
|
||||
spin_lock_irqsave(&dev->lock, flags);
|
||||
if (dev->port_usb) {
|
||||
struct gether *link = dev->port_usb;
|
||||
|
||||
if (link->close)
|
||||
link->close(link);
|
||||
|
||||
/* NOTE: we have no abort-queue primitive we could use
|
||||
* to cancel all pending I/O. Instead, we disable then
|
||||
* reenable the endpoints ... this idiom may leave toggle
|
||||
* wrong, but that's a self-correcting error.
|
||||
*
|
||||
* REVISIT: we *COULD* just let the transfers complete at
|
||||
* their own pace; the network stack can handle old packets.
|
||||
* For the moment we leave this here, since it works.
|
||||
*/
|
||||
usb_ep_disable(link->in_ep);
|
||||
usb_ep_disable(link->out_ep);
|
||||
if (netif_carrier_ok(net)) {
|
||||
DBG(dev, "host still using in/out endpoints\n");
|
||||
usb_ep_enable(link->in_ep);
|
||||
usb_ep_enable(link->out_ep);
|
||||
}
|
||||
}
|
||||
spin_unlock_irqrestore(&dev->lock, flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/* initial value, changed by "ifconfig usb0 hw ether xx:xx:xx:xx:xx:xx" */
|
||||
static char *dev_addr;
|
||||
module_param(dev_addr, charp, S_IRUGO);
|
||||
MODULE_PARM_DESC(dev_addr, "Device Ethernet Address");
|
||||
|
||||
/* this address is invisible to ifconfig */
|
||||
static char *host_addr;
|
||||
module_param(host_addr, charp, S_IRUGO);
|
||||
MODULE_PARM_DESC(host_addr, "Host Ethernet Address");
|
||||
|
||||
static int get_ether_addr(const char *str, u8 *dev_addr)
|
||||
{
|
||||
if (str) {
|
||||
unsigned i;
|
||||
|
||||
for (i = 0; i < 6; i++) {
|
||||
unsigned char num;
|
||||
|
||||
if ((*str == '.') || (*str == ':'))
|
||||
str++;
|
||||
num = hex_to_bin(*str++) << 4;
|
||||
num |= hex_to_bin(*str++);
|
||||
dev_addr [i] = num;
|
||||
}
|
||||
if (is_valid_ether_addr(dev_addr))
|
||||
return 0;
|
||||
}
|
||||
eth_random_addr(dev_addr);
|
||||
return 1;
|
||||
}
|
||||
|
||||
static struct eth_dev *the_dev;
|
||||
|
||||
static const struct net_device_ops eth_netdev_ops = {
|
||||
.ndo_open = eth_open,
|
||||
.ndo_stop = eth_stop,
|
||||
.ndo_start_xmit = eth_start_xmit,
|
||||
.ndo_change_mtu = ueth_change_mtu,
|
||||
.ndo_set_mac_address = eth_mac_addr,
|
||||
.ndo_validate_addr = eth_validate_addr,
|
||||
};
|
||||
|
||||
static struct device_type gadget_type = {
|
||||
.name = "gadget",
|
||||
};
|
||||
|
||||
/**
|
||||
* gether_setup_name - initialize one ethernet-over-usb link
|
||||
* @g: gadget to associated with these links
|
||||
* @ethaddr: NULL, or a buffer in which the ethernet address of the
|
||||
* host side of the link is recorded
|
||||
* @netname: name for network device (for example, "usb")
|
||||
* Context: may sleep
|
||||
*
|
||||
* This sets up the single network link that may be exported by a
|
||||
* gadget driver using this framework. The link layer addresses are
|
||||
* set up using module parameters.
|
||||
*
|
||||
* Returns negative errno, or zero on success
|
||||
*/
|
||||
int gether_setup_name(struct usb_gadget *g, u8 ethaddr[ETH_ALEN],
|
||||
const char *netname)
|
||||
{
|
||||
struct eth_dev *dev;
|
||||
struct net_device *net;
|
||||
int status;
|
||||
|
||||
if (the_dev)
|
||||
return -EBUSY;
|
||||
|
||||
net = alloc_etherdev(sizeof *dev);
|
||||
if (!net)
|
||||
return -ENOMEM;
|
||||
|
||||
dev = netdev_priv(net);
|
||||
spin_lock_init(&dev->lock);
|
||||
spin_lock_init(&dev->req_lock);
|
||||
INIT_WORK(&dev->work, eth_work);
|
||||
INIT_LIST_HEAD(&dev->tx_reqs);
|
||||
INIT_LIST_HEAD(&dev->rx_reqs);
|
||||
|
||||
skb_queue_head_init(&dev->rx_frames);
|
||||
|
||||
/* network device setup */
|
||||
dev->net = net;
|
||||
snprintf(net->name, sizeof(net->name), "%s%%d", netname);
|
||||
|
||||
if (get_ether_addr(dev_addr, net->dev_addr))
|
||||
dev_warn(&g->dev,
|
||||
"using random %s ethernet address\n", "self");
|
||||
if (get_ether_addr(host_addr, dev->host_mac))
|
||||
dev_warn(&g->dev,
|
||||
"using random %s ethernet address\n", "host");
|
||||
|
||||
if (ethaddr)
|
||||
memcpy(ethaddr, dev->host_mac, ETH_ALEN);
|
||||
|
||||
net->netdev_ops = ð_netdev_ops;
|
||||
|
||||
SET_ETHTOOL_OPS(net, &ops);
|
||||
|
||||
dev->gadget = g;
|
||||
SET_NETDEV_DEV(net, &g->dev);
|
||||
SET_NETDEV_DEVTYPE(net, &gadget_type);
|
||||
|
||||
status = register_netdev(net);
|
||||
if (status < 0) {
|
||||
dev_dbg(&g->dev, "register_netdev failed, %d\n", status);
|
||||
free_netdev(net);
|
||||
} else {
|
||||
INFO(dev, "MAC %pM\n", net->dev_addr);
|
||||
INFO(dev, "HOST MAC %pM\n", dev->host_mac);
|
||||
|
||||
the_dev = dev;
|
||||
|
||||
/* two kinds of host-initiated state changes:
|
||||
* - iff DATA transfer is active, carrier is "on"
|
||||
* - tx queueing enabled if open *and* carrier is "on"
|
||||
*/
|
||||
netif_carrier_off(net);
|
||||
}
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
/**
|
||||
* gether_cleanup - remove Ethernet-over-USB device
|
||||
* Context: may sleep
|
||||
*
|
||||
* This is called to free all resources allocated by @gether_setup().
|
||||
*/
|
||||
void gether_cleanup(void)
|
||||
{
|
||||
if (!the_dev)
|
||||
return;
|
||||
|
||||
unregister_netdev(the_dev->net);
|
||||
flush_work_sync(&the_dev->work);
|
||||
free_netdev(the_dev->net);
|
||||
|
||||
the_dev = NULL;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* gether_connect - notify network layer that USB link is active
|
||||
* @link: the USB link, set up with endpoints, descriptors matching
|
||||
* current device speed, and any framing wrapper(s) set up.
|
||||
* Context: irqs blocked
|
||||
*
|
||||
* This is called to activate endpoints and let the network layer know
|
||||
* the connection is active ("carrier detect"). It may cause the I/O
|
||||
* queues to open and start letting network packets flow, but will in
|
||||
* any case activate the endpoints so that they respond properly to the
|
||||
* USB host.
|
||||
*
|
||||
* Verify net_device pointer returned using IS_ERR(). If it doesn't
|
||||
* indicate some error code (negative errno), ep->driver_data values
|
||||
* have been overwritten.
|
||||
*/
|
||||
struct net_device *gether_connect(struct gether *link)
|
||||
{
|
||||
struct eth_dev *dev = the_dev;
|
||||
int result = 0;
|
||||
|
||||
if (!dev)
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
link->in_ep->driver_data = dev;
|
||||
result = usb_ep_enable(link->in_ep);
|
||||
if (result != 0) {
|
||||
DBG(dev, "enable %s --> %d\n",
|
||||
link->in_ep->name, result);
|
||||
goto fail0;
|
||||
}
|
||||
|
||||
link->out_ep->driver_data = dev;
|
||||
result = usb_ep_enable(link->out_ep);
|
||||
if (result != 0) {
|
||||
DBG(dev, "enable %s --> %d\n",
|
||||
link->out_ep->name, result);
|
||||
goto fail1;
|
||||
}
|
||||
|
||||
if (result == 0)
|
||||
result = alloc_requests(dev, link, qlen(dev->gadget));
|
||||
|
||||
if (result == 0) {
|
||||
dev->zlp = link->is_zlp_ok;
|
||||
DBG(dev, "qlen %d\n", qlen(dev->gadget));
|
||||
|
||||
dev->header_len = link->header_len;
|
||||
dev->unwrap = link->unwrap;
|
||||
dev->wrap = link->wrap;
|
||||
|
||||
spin_lock(&dev->lock);
|
||||
dev->port_usb = link;
|
||||
link->ioport = dev;
|
||||
if (netif_running(dev->net)) {
|
||||
if (link->open)
|
||||
link->open(link);
|
||||
} else {
|
||||
if (link->close)
|
||||
link->close(link);
|
||||
}
|
||||
spin_unlock(&dev->lock);
|
||||
|
||||
netif_carrier_on(dev->net);
|
||||
if (netif_running(dev->net))
|
||||
eth_start(dev, GFP_ATOMIC);
|
||||
|
||||
/* on error, disable any endpoints */
|
||||
} else {
|
||||
(void) usb_ep_disable(link->out_ep);
|
||||
fail1:
|
||||
(void) usb_ep_disable(link->in_ep);
|
||||
}
|
||||
fail0:
|
||||
/* caller is responsible for cleanup on error */
|
||||
if (result < 0)
|
||||
return ERR_PTR(result);
|
||||
return dev->net;
|
||||
}
|
||||
|
||||
/**
|
||||
* gether_disconnect - notify network layer that USB link is inactive
|
||||
* @link: the USB link, on which gether_connect() was called
|
||||
* Context: irqs blocked
|
||||
*
|
||||
* This is called to deactivate endpoints and let the network layer know
|
||||
* the connection went inactive ("no carrier").
|
||||
*
|
||||
* On return, the state is as if gether_connect() had never been called.
|
||||
* The endpoints are inactive, and accordingly without active USB I/O.
|
||||
* Pointers to endpoint descriptors and endpoint private data are nulled.
|
||||
*/
|
||||
void gether_disconnect(struct gether *link)
|
||||
{
|
||||
struct eth_dev *dev = link->ioport;
|
||||
struct usb_request *req;
|
||||
|
||||
WARN_ON(!dev);
|
||||
if (!dev)
|
||||
return;
|
||||
|
||||
DBG(dev, "%s\n", __func__);
|
||||
|
||||
netif_stop_queue(dev->net);
|
||||
netif_carrier_off(dev->net);
|
||||
|
||||
/* disable endpoints, forcing (synchronous) completion
|
||||
* of all pending i/o. then free the request objects
|
||||
* and forget about the endpoints.
|
||||
*/
|
||||
usb_ep_disable(link->in_ep);
|
||||
spin_lock(&dev->req_lock);
|
||||
while (!list_empty(&dev->tx_reqs)) {
|
||||
req = container_of(dev->tx_reqs.next,
|
||||
struct usb_request, list);
|
||||
list_del(&req->list);
|
||||
|
||||
spin_unlock(&dev->req_lock);
|
||||
usb_ep_free_request(link->in_ep, req);
|
||||
spin_lock(&dev->req_lock);
|
||||
}
|
||||
spin_unlock(&dev->req_lock);
|
||||
link->in_ep->driver_data = NULL;
|
||||
link->in_ep->desc = NULL;
|
||||
|
||||
usb_ep_disable(link->out_ep);
|
||||
spin_lock(&dev->req_lock);
|
||||
while (!list_empty(&dev->rx_reqs)) {
|
||||
req = container_of(dev->rx_reqs.next,
|
||||
struct usb_request, list);
|
||||
list_del(&req->list);
|
||||
|
||||
spin_unlock(&dev->req_lock);
|
||||
usb_ep_free_request(link->out_ep, req);
|
||||
spin_lock(&dev->req_lock);
|
||||
}
|
||||
spin_unlock(&dev->req_lock);
|
||||
link->out_ep->driver_data = NULL;
|
||||
link->out_ep->desc = NULL;
|
||||
|
||||
/* finish forgetting about this USB link episode */
|
||||
dev->header_len = 0;
|
||||
dev->unwrap = NULL;
|
||||
dev->wrap = NULL;
|
||||
|
||||
spin_lock(&dev->lock);
|
||||
dev->port_usb = NULL;
|
||||
link->ioport = NULL;
|
||||
spin_unlock(&dev->lock);
|
||||
}
|
||||
154
drivers/staging/ccg/u_ether.h
Normal file
154
drivers/staging/ccg/u_ether.h
Normal file
|
|
@ -0,0 +1,154 @@
|
|||
/*
|
||||
* u_ether.h -- interface to USB gadget "ethernet link" utilities
|
||||
*
|
||||
* Copyright (C) 2003-2005,2008 David Brownell
|
||||
* Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
|
||||
* Copyright (C) 2008 Nokia Corporation
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*/
|
||||
|
||||
#ifndef __U_ETHER_H
|
||||
#define __U_ETHER_H
|
||||
|
||||
#include <linux/err.h>
|
||||
#include <linux/if_ether.h>
|
||||
#include <linux/usb/composite.h>
|
||||
#include <linux/usb/cdc.h>
|
||||
|
||||
#include "gadget_chips.h"
|
||||
|
||||
|
||||
/*
|
||||
* This represents the USB side of an "ethernet" link, managed by a USB
|
||||
* function which provides control and (maybe) framing. Two functions
|
||||
* in different configurations could share the same ethernet link/netdev,
|
||||
* using different host interaction models.
|
||||
*
|
||||
* There is a current limitation that only one instance of this link may
|
||||
* be present in any given configuration. When that's a problem, network
|
||||
* layer facilities can be used to package multiple logical links on this
|
||||
* single "physical" one.
|
||||
*/
|
||||
struct gether {
|
||||
struct usb_function func;
|
||||
|
||||
/* updated by gether_{connect,disconnect} */
|
||||
struct eth_dev *ioport;
|
||||
|
||||
/* endpoints handle full and/or high speeds */
|
||||
struct usb_ep *in_ep;
|
||||
struct usb_ep *out_ep;
|
||||
|
||||
bool is_zlp_ok;
|
||||
|
||||
u16 cdc_filter;
|
||||
|
||||
/* hooks for added framing, as needed for RNDIS and EEM. */
|
||||
u32 header_len;
|
||||
/* NCM requires fixed size bundles */
|
||||
bool is_fixed;
|
||||
u32 fixed_out_len;
|
||||
u32 fixed_in_len;
|
||||
struct sk_buff *(*wrap)(struct gether *port,
|
||||
struct sk_buff *skb);
|
||||
int (*unwrap)(struct gether *port,
|
||||
struct sk_buff *skb,
|
||||
struct sk_buff_head *list);
|
||||
|
||||
/* called on network open/close */
|
||||
void (*open)(struct gether *);
|
||||
void (*close)(struct gether *);
|
||||
};
|
||||
|
||||
#define DEFAULT_FILTER (USB_CDC_PACKET_TYPE_BROADCAST \
|
||||
|USB_CDC_PACKET_TYPE_ALL_MULTICAST \
|
||||
|USB_CDC_PACKET_TYPE_PROMISCUOUS \
|
||||
|USB_CDC_PACKET_TYPE_DIRECTED)
|
||||
|
||||
/* variant of gether_setup that allows customizing network device name */
|
||||
int gether_setup_name(struct usb_gadget *g, u8 ethaddr[ETH_ALEN],
|
||||
const char *netname);
|
||||
|
||||
/* netdev setup/teardown as directed by the gadget driver */
|
||||
/* gether_setup - initialize one ethernet-over-usb link
|
||||
* @g: gadget to associated with these links
|
||||
* @ethaddr: NULL, or a buffer in which the ethernet address of the
|
||||
* host side of the link is recorded
|
||||
* Context: may sleep
|
||||
*
|
||||
* This sets up the single network link that may be exported by a
|
||||
* gadget driver using this framework. The link layer addresses are
|
||||
* set up using module parameters.
|
||||
*
|
||||
* Returns negative errno, or zero on success
|
||||
*/
|
||||
static inline int gether_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN])
|
||||
{
|
||||
return gether_setup_name(g, ethaddr, "usb");
|
||||
}
|
||||
|
||||
void gether_cleanup(void);
|
||||
|
||||
/* connect/disconnect is handled by individual functions */
|
||||
struct net_device *gether_connect(struct gether *);
|
||||
void gether_disconnect(struct gether *);
|
||||
|
||||
/* Some controllers can't support CDC Ethernet (ECM) ... */
|
||||
static inline bool can_support_ecm(struct usb_gadget *gadget)
|
||||
{
|
||||
if (!gadget_supports_altsettings(gadget))
|
||||
return false;
|
||||
|
||||
/* Everything else is *presumably* fine ... but this is a bit
|
||||
* chancy, so be **CERTAIN** there are no hardware issues with
|
||||
* your controller. Add it above if it can't handle CDC.
|
||||
*/
|
||||
return true;
|
||||
}
|
||||
|
||||
/* each configuration may bind one instance of an ethernet link */
|
||||
int geth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
|
||||
int ecm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
|
||||
int ncm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
|
||||
int eem_bind_config(struct usb_configuration *c);
|
||||
|
||||
#ifdef USB_ETH_RNDIS
|
||||
|
||||
int rndis_bind_config_vendor(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
|
||||
u32 vendorID, const char *manufacturer);
|
||||
|
||||
#else
|
||||
|
||||
static inline int
|
||||
rndis_bind_config_vendor(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
|
||||
u32 vendorID, const char *manufacturer)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
/**
|
||||
* rndis_bind_config - add RNDIS network link to a configuration
|
||||
* @c: the configuration to support the network link
|
||||
* @ethaddr: a buffer in which the ethernet address of the host side
|
||||
* side of the link was recorded
|
||||
* Context: single threaded during gadget setup
|
||||
*
|
||||
* Returns zero on success, else negative errno.
|
||||
*
|
||||
* Caller must have called @gether_setup(). Caller is also responsible
|
||||
* for calling @gether_cleanup() before module unload.
|
||||
*/
|
||||
static inline int rndis_bind_config(struct usb_configuration *c,
|
||||
u8 ethaddr[ETH_ALEN])
|
||||
{
|
||||
return rndis_bind_config_vendor(c, ethaddr, 0, NULL);
|
||||
}
|
||||
|
||||
|
||||
#endif /* __U_ETHER_H */
|
||||
1341
drivers/staging/ccg/u_serial.c
Normal file
1341
drivers/staging/ccg/u_serial.c
Normal file
File diff suppressed because it is too large
Load Diff
65
drivers/staging/ccg/u_serial.h
Normal file
65
drivers/staging/ccg/u_serial.h
Normal file
|
|
@ -0,0 +1,65 @@
|
|||
/*
|
||||
* u_serial.h - interface to USB gadget "serial port"/TTY utilities
|
||||
*
|
||||
* Copyright (C) 2008 David Brownell
|
||||
* Copyright (C) 2008 by Nokia Corporation
|
||||
*
|
||||
* This software is distributed under the terms of the GNU General
|
||||
* Public License ("GPL") as published by the Free Software Foundation,
|
||||
* either version 2 of that License or (at your option) any later version.
|
||||
*/
|
||||
|
||||
#ifndef __U_SERIAL_H
|
||||
#define __U_SERIAL_H
|
||||
|
||||
#include <linux/usb/composite.h>
|
||||
#include <linux/usb/cdc.h>
|
||||
|
||||
/*
|
||||
* One non-multiplexed "serial" I/O port ... there can be several of these
|
||||
* on any given USB peripheral device, if it provides enough endpoints.
|
||||
*
|
||||
* The "u_serial" utility component exists to do one thing: manage TTY
|
||||
* style I/O using the USB peripheral endpoints listed here, including
|
||||
* hookups to sysfs and /dev for each logical "tty" device.
|
||||
*
|
||||
* REVISIT at least ACM could support tiocmget() if needed.
|
||||
*
|
||||
* REVISIT someday, allow multiplexing several TTYs over these endpoints.
|
||||
*/
|
||||
struct gserial {
|
||||
struct usb_function func;
|
||||
|
||||
/* port is managed by gserial_{connect,disconnect} */
|
||||
struct gs_port *ioport;
|
||||
|
||||
struct usb_ep *in;
|
||||
struct usb_ep *out;
|
||||
|
||||
/* REVISIT avoid this CDC-ACM support harder ... */
|
||||
struct usb_cdc_line_coding port_line_coding; /* 9600-8-N-1 etc */
|
||||
|
||||
/* notification callbacks */
|
||||
void (*connect)(struct gserial *p);
|
||||
void (*disconnect)(struct gserial *p);
|
||||
int (*send_break)(struct gserial *p, int duration);
|
||||
};
|
||||
|
||||
/* utilities to allocate/free request and buffer */
|
||||
struct usb_request *gs_alloc_req(struct usb_ep *ep, unsigned len, gfp_t flags);
|
||||
void gs_free_req(struct usb_ep *, struct usb_request *req);
|
||||
|
||||
/* port setup/teardown is handled by gadget driver */
|
||||
int gserial_setup(struct usb_gadget *g, unsigned n_ports);
|
||||
void gserial_cleanup(void);
|
||||
|
||||
/* connect/disconnect is handled by individual functions */
|
||||
int gserial_connect(struct gserial *, u8 port_num);
|
||||
void gserial_disconnect(struct gserial *);
|
||||
|
||||
/* functions are bound to configurations by a config or gadget driver */
|
||||
int acm_bind_config(struct usb_configuration *c, u8 port_num);
|
||||
int gser_bind_config(struct usb_configuration *c, u8 port_num);
|
||||
int obex_bind_config(struct usb_configuration *c, u8 port_num);
|
||||
|
||||
#endif /* __U_SERIAL_H */
|
||||
71
drivers/staging/ccg/usbstring.c
Normal file
71
drivers/staging/ccg/usbstring.c
Normal file
|
|
@ -0,0 +1,71 @@
|
|||
/*
|
||||
* Copyright (C) 2003 David Brownell
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Lesser General Public License as published
|
||||
* by the Free Software Foundation; either version 2.1 of the License, or
|
||||
* (at your option) any later version.
|
||||
*/
|
||||
|
||||
#include <linux/errno.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/nls.h>
|
||||
|
||||
#include <linux/usb/ch9.h>
|
||||
#include <linux/usb/gadget.h>
|
||||
|
||||
|
||||
/**
|
||||
* usb_gadget_get_string - fill out a string descriptor
|
||||
* @table: of c strings encoded using UTF-8
|
||||
* @id: string id, from low byte of wValue in get string descriptor
|
||||
* @buf: at least 256 bytes, must be 16-bit aligned
|
||||
*
|
||||
* Finds the UTF-8 string matching the ID, and converts it into a
|
||||
* string descriptor in utf16-le.
|
||||
* Returns length of descriptor (always even) or negative errno
|
||||
*
|
||||
* If your driver needs stings in multiple languages, you'll probably
|
||||
* "switch (wIndex) { ... }" in your ep0 string descriptor logic,
|
||||
* using this routine after choosing which set of UTF-8 strings to use.
|
||||
* Note that US-ASCII is a strict subset of UTF-8; any string bytes with
|
||||
* the eighth bit set will be multibyte UTF-8 characters, not ISO-8859/1
|
||||
* characters (which are also widely used in C strings).
|
||||
*/
|
||||
int
|
||||
usb_gadget_get_string (struct usb_gadget_strings *table, int id, u8 *buf)
|
||||
{
|
||||
struct usb_string *s;
|
||||
int len;
|
||||
|
||||
/* descriptor 0 has the language id */
|
||||
if (id == 0) {
|
||||
buf [0] = 4;
|
||||
buf [1] = USB_DT_STRING;
|
||||
buf [2] = (u8) table->language;
|
||||
buf [3] = (u8) (table->language >> 8);
|
||||
return 4;
|
||||
}
|
||||
for (s = table->strings; s && s->s; s++)
|
||||
if (s->id == id)
|
||||
break;
|
||||
|
||||
/* unrecognized: stall. */
|
||||
if (!s || !s->s)
|
||||
return -EINVAL;
|
||||
|
||||
/* string descriptors have length, tag, then UTF16-LE text */
|
||||
len = min ((size_t) 126, strlen (s->s));
|
||||
len = utf8s_to_utf16s(s->s, len, UTF16_LITTLE_ENDIAN,
|
||||
(wchar_t *) &buf[2], 126);
|
||||
if (len < 0)
|
||||
return -EINVAL;
|
||||
buf [0] = (len + 1) * 2;
|
||||
buf [1] = USB_DT_STRING;
|
||||
return buf [0];
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user