mirror of
https://github.com/torvalds/linux.git
synced 2024-11-11 22:51:42 +00:00
mfd: Add viperboard driver
Add mfd driver for Nano River Technologies viperboard. Signed-off-by: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Lars Poeschel
Samuel Ortiz
parent
b9fbb62eb6
commit
f01312d846
@ -1065,6 +1065,20 @@ config MFD_PALMAS
|
||||
If you say yes here you get support for the Palmas
|
||||
series of PMIC chips from Texas Instruments.
|
||||
|
||||
config MFD_VIPERBOARD
|
||||
tristate "Support for Nano River Technologies Viperboard"
|
||||
select MFD_CORE
|
||||
depends on USB
|
||||
default n
|
||||
help
|
||||
Say yes here if you want support for Nano River Technologies
|
||||
Viperboard.
|
||||
There are mfd cell drivers available for i2c master, adc and
|
||||
both gpios found on the board. The spi part does not yet
|
||||
have a driver.
|
||||
You need to select the mfd cell drivers separately.
|
||||
The drivers do not support all features the board exposes.
|
||||
|
||||
endmenu
|
||||
endif
|
||||
|
||||
|
||||
@ -139,6 +139,7 @@ obj-$(CONFIG_MFD_TPS65090) += tps65090.o
|
||||
obj-$(CONFIG_MFD_AAT2870_CORE) += aat2870-core.o
|
||||
obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o
|
||||
obj-$(CONFIG_MFD_PALMAS) += palmas.o
|
||||
obj-$(CONFIG_MFD_VIPERBOARD) += viperboard.o
|
||||
obj-$(CONFIG_MFD_RC5T583) += rc5t583.o rc5t583-irq.o
|
||||
obj-$(CONFIG_MFD_SEC_CORE) += sec-core.o sec-irq.o
|
||||
obj-$(CONFIG_MFD_SYSCON) += syscon.o
|
||||
|
||||
129
drivers/mfd/viperboard.c
Normal file
129
drivers/mfd/viperboard.c
Normal file
@ -0,0 +1,129 @@
|
||||
/*
|
||||
* Nano River Technologies viperboard driver
|
||||
*
|
||||
* This is the core driver for the viperboard. There are cell drivers
|
||||
* available for I2C, ADC and both GPIOs. SPI is not yet supported.
|
||||
* The drivers do not support all features the board exposes. See user
|
||||
* manual of the viperboard.
|
||||
*
|
||||
* (C) 2012 by Lemonage GmbH
|
||||
* Author: Lars Poeschel <poeschel@lemonage.de>
|
||||
* All rights reserved.
|
||||
*
|
||||
* 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/errno.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/mutex.h>
|
||||
|
||||
#include <linux/mfd/core.h>
|
||||
#include <linux/mfd/viperboard.h>
|
||||
|
||||
#include <linux/usb.h>
|
||||
|
||||
|
||||
static const struct usb_device_id vprbrd_table[] = {
|
||||
{ USB_DEVICE(0x2058, 0x1005) }, /* Nano River Technologies */
|
||||
{ } /* Terminating entry */
|
||||
};
|
||||
|
||||
MODULE_DEVICE_TABLE(usb, vprbrd_table);
|
||||
|
||||
static struct mfd_cell vprbrd_devs[] = {
|
||||
};
|
||||
|
||||
static int vprbrd_probe(struct usb_interface *interface,
|
||||
const struct usb_device_id *id)
|
||||
{
|
||||
struct vprbrd *vb;
|
||||
|
||||
u16 version = 0;
|
||||
int pipe, ret;
|
||||
unsigned char buf[1];
|
||||
|
||||
/* allocate memory for our device state and initialize it */
|
||||
vb = kzalloc(sizeof(*vb), GFP_KERNEL);
|
||||
if (vb == NULL) {
|
||||
dev_err(&interface->dev, "Out of memory\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
mutex_init(&vb->lock);
|
||||
|
||||
vb->usb_dev = usb_get_dev(interface_to_usbdev(interface));
|
||||
|
||||
/* save our data pointer in this interface device */
|
||||
usb_set_intfdata(interface, vb);
|
||||
dev_set_drvdata(&vb->pdev.dev, vb);
|
||||
|
||||
/* get version information, major first, minor then */
|
||||
pipe = usb_rcvctrlpipe(vb->usb_dev, 0);
|
||||
ret = usb_control_msg(vb->usb_dev, pipe, VPRBRD_USB_REQUEST_MAJOR,
|
||||
VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, buf, 1,
|
||||
VPRBRD_USB_TIMEOUT_MS);
|
||||
if (ret == 1)
|
||||
version = buf[0];
|
||||
|
||||
ret = usb_control_msg(vb->usb_dev, pipe, VPRBRD_USB_REQUEST_MINOR,
|
||||
VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, buf, 1,
|
||||
VPRBRD_USB_TIMEOUT_MS);
|
||||
if (ret == 1) {
|
||||
version <<= 8;
|
||||
version = version | buf[0];
|
||||
}
|
||||
|
||||
dev_info(&interface->dev,
|
||||
"version %x.%02x found at bus %03d address %03d\n",
|
||||
version >> 8, version & 0xff,
|
||||
vb->usb_dev->bus->busnum, vb->usb_dev->devnum);
|
||||
|
||||
ret = mfd_add_devices(&interface->dev, -1, vprbrd_devs,
|
||||
ARRAY_SIZE(vprbrd_devs), NULL, 0, NULL);
|
||||
if (ret != 0) {
|
||||
dev_err(&interface->dev, "Failed to add mfd devices to core.");
|
||||
goto error;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
error:
|
||||
if (vb) {
|
||||
usb_put_dev(vb->usb_dev);
|
||||
kfree(vb);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void vprbrd_disconnect(struct usb_interface *interface)
|
||||
{
|
||||
struct vprbrd *vb = usb_get_intfdata(interface);
|
||||
|
||||
mfd_remove_devices(&interface->dev);
|
||||
usb_set_intfdata(interface, NULL);
|
||||
usb_put_dev(vb->usb_dev);
|
||||
kfree(vb);
|
||||
|
||||
dev_dbg(&interface->dev, "disconnected\n");
|
||||
}
|
||||
|
||||
static struct usb_driver vprbrd_driver = {
|
||||
.name = "viperboard",
|
||||
.probe = vprbrd_probe,
|
||||
.disconnect = vprbrd_disconnect,
|
||||
.id_table = vprbrd_table,
|
||||
};
|
||||
|
||||
module_usb_driver(vprbrd_driver);
|
||||
|
||||
MODULE_DESCRIPTION("Nano River Technologies viperboard mfd core driver");
|
||||
MODULE_AUTHOR("Lars Poeschel <poeschel@lemonage.de>");
|
||||
MODULE_LICENSE("GPL");
|
||||
105
include/linux/mfd/viperboard.h
Normal file
105
include/linux/mfd/viperboard.h
Normal file
@ -0,0 +1,105 @@
|
||||
/*
|
||||
* include/linux/mfd/viperboard.h
|
||||
*
|
||||
* Nano River Technologies viperboard definitions
|
||||
*
|
||||
* (C) 2012 by Lemonage GmbH
|
||||
* Author: Lars Poeschel <poeschel@lemonage.de>
|
||||
* All rights reserved.
|
||||
*
|
||||
* 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 __MFD_VIPERBOARD_H__
|
||||
#define __MFD_VIPERBOARD_H__
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/usb.h>
|
||||
|
||||
#define VPRBRD_EP_OUT 0x02
|
||||
#define VPRBRD_EP_IN 0x86
|
||||
|
||||
#define VPRBRD_I2C_MSG_LEN 512 /* max length of a msg on USB level */
|
||||
|
||||
#define VPRBRD_I2C_FREQ_6MHZ 1 /* 6 MBit/s */
|
||||
#define VPRBRD_I2C_FREQ_3MHZ 2 /* 3 MBit/s */
|
||||
#define VPRBRD_I2C_FREQ_1MHZ 3 /* 1 MBit/s */
|
||||
#define VPRBRD_I2C_FREQ_FAST 4 /* 400 kbit/s */
|
||||
#define VPRBRD_I2C_FREQ_400KHZ VPRBRD_I2C_FREQ_FAST
|
||||
#define VPRBRD_I2C_FREQ_200KHZ 5 /* 200 kbit/s */
|
||||
#define VPRBRD_I2C_FREQ_STD 6 /* 100 kbit/s */
|
||||
#define VPRBRD_I2C_FREQ_100KHZ VPRBRD_I2C_FREQ_STD
|
||||
#define VPRBRD_I2C_FREQ_10KHZ 7 /* 10 kbit/s */
|
||||
|
||||
#define VPRBRD_I2C_CMD_WRITE 0x00
|
||||
#define VPRBRD_I2C_CMD_READ 0x01
|
||||
#define VPRBRD_I2C_CMD_ADDR 0x02
|
||||
|
||||
#define VPRBRD_USB_TYPE_OUT 0x40
|
||||
#define VPRBRD_USB_TYPE_IN 0xc0
|
||||
#define VPRBRD_USB_TIMEOUT_MS 100
|
||||
#define VPRBRD_USB_REQUEST_MAJOR 0xea
|
||||
#define VPRBRD_USB_REQUEST_MINOR 0xeb
|
||||
|
||||
struct vprbrd_i2c_write_hdr {
|
||||
u8 cmd;
|
||||
u16 addr;
|
||||
u8 len1;
|
||||
u8 len2;
|
||||
u8 last;
|
||||
u8 chan;
|
||||
u16 spi;
|
||||
} __packed;
|
||||
|
||||
struct vprbrd_i2c_read_hdr {
|
||||
u8 cmd;
|
||||
u16 addr;
|
||||
u8 len0;
|
||||
u8 len1;
|
||||
u8 len2;
|
||||
u8 len3;
|
||||
u8 len4;
|
||||
u8 len5;
|
||||
u16 tf1; /* transfer 1 length */
|
||||
u16 tf2; /* transfer 2 length */
|
||||
} __packed;
|
||||
|
||||
struct vprbrd_i2c_status {
|
||||
u8 unknown[11];
|
||||
u8 status;
|
||||
} __packed;
|
||||
|
||||
struct vprbrd_i2c_write_msg {
|
||||
struct vprbrd_i2c_write_hdr header;
|
||||
u8 data[VPRBRD_I2C_MSG_LEN
|
||||
- sizeof(struct vprbrd_i2c_write_hdr)];
|
||||
} __packed;
|
||||
|
||||
struct vprbrd_i2c_read_msg {
|
||||
struct vprbrd_i2c_read_hdr header;
|
||||
u8 data[VPRBRD_I2C_MSG_LEN
|
||||
- sizeof(struct vprbrd_i2c_read_hdr)];
|
||||
} __packed;
|
||||
|
||||
struct vprbrd_i2c_addr_msg {
|
||||
u8 cmd;
|
||||
u8 addr;
|
||||
u8 unknown1;
|
||||
u16 len;
|
||||
u8 unknown2;
|
||||
u8 unknown3;
|
||||
} __packed;
|
||||
|
||||
/* Structure to hold all device specific stuff */
|
||||
struct vprbrd {
|
||||
struct usb_device *usb_dev; /* the usb device for this device */
|
||||
struct mutex lock;
|
||||
u8 buf[sizeof(struct vprbrd_i2c_write_msg)];
|
||||
struct platform_device pdev;
|
||||
};
|
||||
|
||||
#endif /* __MFD_VIPERBOARD_H__ */
|
||||
Loading…
Reference in New Issue
Block a user