mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 01:51:53 +00:00
8f900a9a6e
The USB 2.0 specification says that bMaxPower is the maximum power consumption expressed in 2 mA units and the USB 3.0 specification says that it is expressed in 8 mA units. This patch renames bMaxPower to MaxPower and the various /2 and *2 are removed. Before reporting the config descriptor, the proper value is computer based on the speed, all in-tree users are updated. MaxPower is also increased to u16 so we can store the nokia gadget value which is larger than the max value allowed for u8. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com>
178 lines
4.8 KiB
C
178 lines
4.8 KiB
C
/*
|
|
* gmidi.c -- USB MIDI Gadget Driver
|
|
*
|
|
* Copyright (C) 2006 Thumtronics Pty Ltd.
|
|
* Developed for Thumtronics by Grey Innovation
|
|
* Ben Williamson <ben.williamson@greyinnovation.com>
|
|
*
|
|
* This software is distributed under the terms of the GNU General Public
|
|
* License ("GPL") version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This code is based in part on:
|
|
*
|
|
* Gadget Zero driver, Copyright (C) 2003-2004 David Brownell.
|
|
* USB Audio driver, Copyright (C) 2002 by Takashi Iwai.
|
|
* USB MIDI driver, Copyright (C) 2002-2005 Clemens Ladisch.
|
|
*
|
|
* Refer to the USB Device Class Definition for MIDI Devices:
|
|
* http://www.usb.org/developers/devclass_docs/midi10.pdf
|
|
*/
|
|
|
|
/* #define VERBOSE_DEBUG */
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
#include <linux/device.h>
|
|
|
|
#include <sound/core.h>
|
|
#include <sound/initval.h>
|
|
#include <sound/rawmidi.h>
|
|
|
|
#include <linux/usb/ch9.h>
|
|
#include <linux/usb/composite.h>
|
|
#include <linux/usb/gadget.h>
|
|
#include <linux/usb/audio.h>
|
|
#include <linux/usb/midi.h>
|
|
|
|
#include "gadget_chips.h"
|
|
|
|
#include "f_midi.c"
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
MODULE_AUTHOR("Ben Williamson");
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
static const char shortname[] = "g_midi";
|
|
static const char longname[] = "MIDI Gadget";
|
|
|
|
USB_GADGET_COMPOSITE_OPTIONS();
|
|
|
|
static int index = SNDRV_DEFAULT_IDX1;
|
|
module_param(index, int, S_IRUGO);
|
|
MODULE_PARM_DESC(index, "Index value for the USB MIDI Gadget adapter.");
|
|
|
|
static char *id = SNDRV_DEFAULT_STR1;
|
|
module_param(id, charp, S_IRUGO);
|
|
MODULE_PARM_DESC(id, "ID string for the USB MIDI Gadget adapter.");
|
|
|
|
static unsigned int buflen = 256;
|
|
module_param(buflen, uint, S_IRUGO);
|
|
MODULE_PARM_DESC(buflen, "MIDI buffer length");
|
|
|
|
static unsigned int qlen = 32;
|
|
module_param(qlen, uint, S_IRUGO);
|
|
MODULE_PARM_DESC(qlen, "USB read request queue length");
|
|
|
|
static unsigned int in_ports = 1;
|
|
module_param(in_ports, uint, S_IRUGO);
|
|
MODULE_PARM_DESC(in_ports, "Number of MIDI input ports");
|
|
|
|
static unsigned int out_ports = 1;
|
|
module_param(out_ports, uint, S_IRUGO);
|
|
MODULE_PARM_DESC(out_ports, "Number of MIDI output ports");
|
|
|
|
/* Thanks to Grey Innovation for donating this product ID.
|
|
*
|
|
* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!!
|
|
* Instead: allocate your own, using normal USB-IF procedures.
|
|
*/
|
|
#define DRIVER_VENDOR_NUM 0x17b3 /* Grey Innovation */
|
|
#define DRIVER_PRODUCT_NUM 0x0004 /* Linux-USB "MIDI Gadget" */
|
|
|
|
/* string IDs are assigned dynamically */
|
|
|
|
#define STRING_DESCRIPTION_IDX USB_GADGET_FIRST_AVAIL_IDX
|
|
|
|
static struct usb_device_descriptor device_desc = {
|
|
.bLength = USB_DT_DEVICE_SIZE,
|
|
.bDescriptorType = USB_DT_DEVICE,
|
|
.bcdUSB = __constant_cpu_to_le16(0x0200),
|
|
.bDeviceClass = USB_CLASS_PER_INTERFACE,
|
|
.idVendor = __constant_cpu_to_le16(DRIVER_VENDOR_NUM),
|
|
.idProduct = __constant_cpu_to_le16(DRIVER_PRODUCT_NUM),
|
|
/* .iManufacturer = DYNAMIC */
|
|
/* .iProduct = DYNAMIC */
|
|
.bNumConfigurations = 1,
|
|
};
|
|
|
|
static struct usb_string strings_dev[] = {
|
|
[USB_GADGET_MANUFACTURER_IDX].s = "Grey Innovation",
|
|
[USB_GADGET_PRODUCT_IDX].s = "MIDI Gadget",
|
|
[USB_GADGET_SERIAL_IDX].s = "",
|
|
[STRING_DESCRIPTION_IDX].s = "MIDI",
|
|
{ } /* end of list */
|
|
};
|
|
|
|
static struct usb_gadget_strings stringtab_dev = {
|
|
.language = 0x0409, /* en-us */
|
|
.strings = strings_dev,
|
|
};
|
|
|
|
static struct usb_gadget_strings *dev_strings[] = {
|
|
&stringtab_dev,
|
|
NULL,
|
|
};
|
|
|
|
static int __exit midi_unbind(struct usb_composite_dev *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct usb_configuration midi_config = {
|
|
.label = "MIDI Gadget",
|
|
.bConfigurationValue = 1,
|
|
/* .iConfiguration = DYNAMIC */
|
|
.bmAttributes = USB_CONFIG_ATT_ONE,
|
|
.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW,
|
|
};
|
|
|
|
static int __init midi_bind_config(struct usb_configuration *c)
|
|
{
|
|
return f_midi_bind_config(c, index, id,
|
|
in_ports, out_ports,
|
|
buflen, qlen);
|
|
}
|
|
|
|
static int __init midi_bind(struct usb_composite_dev *cdev)
|
|
{
|
|
int status;
|
|
|
|
status = usb_string_ids_tab(cdev, strings_dev);
|
|
if (status < 0)
|
|
return status;
|
|
device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
|
|
device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
|
|
midi_config.iConfiguration = strings_dev[STRING_DESCRIPTION_IDX].id;
|
|
|
|
status = usb_add_config(cdev, &midi_config, midi_bind_config);
|
|
if (status < 0)
|
|
return status;
|
|
usb_composite_overwrite_options(cdev, &coverwrite);
|
|
pr_info("%s\n", longname);
|
|
return 0;
|
|
}
|
|
|
|
static __refdata struct usb_composite_driver midi_driver = {
|
|
.name = (char *) longname,
|
|
.dev = &device_desc,
|
|
.strings = dev_strings,
|
|
.max_speed = USB_SPEED_HIGH,
|
|
.bind = midi_bind,
|
|
.unbind = __exit_p(midi_unbind),
|
|
};
|
|
|
|
static int __init midi_init(void)
|
|
{
|
|
return usb_composite_probe(&midi_driver);
|
|
}
|
|
module_init(midi_init);
|
|
|
|
static void __exit midi_cleanup(void)
|
|
{
|
|
usb_composite_unregister(&midi_driver);
|
|
}
|
|
module_exit(midi_cleanup);
|
|
|