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linux/drivers/usb/serial/zte_ev.c

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USB: serial: add zte_ev.c driver This adds a driver for the zte_ev set of usb to serial devices. It is based on a patch floating around the internet that modified the generic usb-serial driver to only work for this type of device. I've left comments in the code that I think show the data commands being sent to the device, which I'm guessing come from a usb analyzer. Maybe they can help others out as well. Many thanks to nirinA raseliarison for pointing the original patch out to me, and for testing that the driver works properly. Tested-by: nirinA raseliarison <nirina.raseliarison@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-18 07:59:51 +08:00
/*
* ZTE_EV USB serial driver
*
* Copyright (C) 2012 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Copyright (C) 2012 Linux Foundation
*
* 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 driver is based on code found in a ZTE_ENV patch that modified
* the usb-serial generic driver. Comments were left in that I think
* show the commands used to talk to the device, but I am not sure.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>
#include <linux/uaccess.h>
#define MAX_SETUP_DATA_SIZE 32
static void debug_data(struct device *dev, const char *function, int len,
const unsigned char *data, int result)
{
dev_dbg(dev, "result = %d\n", result);
if (result == len)
dev_dbg(dev, "%s - length = %d, data = %*ph\n", function,
len, len, data);
}
static int zte_ev_usb_serial_open(struct tty_struct *tty,
struct usb_serial_port *port)
{
struct usb_device *udev = port->serial->dev;
struct device *dev = &port->dev;
int result = 0;
int len;
unsigned char *buf;
if (port->number != 0)
return -ENODEV;
buf = kmalloc(MAX_SETUP_DATA_SIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
/* send 1st ctl cmd(CTL 21 22 01 00 00 00 00 00) */
len = 0;
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x22, 0x21,
0x0001, 0x0000, NULL, len,
HZ * USB_CTRL_GET_TIMEOUT);
dev_dbg(dev, "result = %d\n", result);
/* send 2st cmd and recieve data */
/*
* 16.0 CTL a1 21 00 00 00 00 07 00 CLASS 25.1.0(5)
* 16.0 DI 00 96 00 00 00 00 08
*/
len = 0x0007;
result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
0x21, 0xa1,
0x0000, 0x0000, buf, len,
HZ * USB_CTRL_GET_TIMEOUT);
debug_data(dev, __func__, len, buf, result);
/* send 3 cmd */
/*
* 16.0 CTL 21 20 00 00 00 00 07 00 CLASS 30.1.0
* 16.0 DO 80 25 00 00 00 00 08 .%..... 30.2.0
*/
len = 0x0007;
buf[0] = 0x80;
buf[1] = 0x25;
buf[2] = 0x00;
buf[3] = 0x00;
buf[4] = 0x00;
buf[5] = 0x00;
buf[6] = 0x08;
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x20, 0x21,
0x0000, 0x0000, buf, len,
HZ * USB_CTRL_GET_TIMEOUT);
debug_data(dev, __func__, len, buf, result);
/* send 4 cmd */
/*
* 16.0 CTL 21 22 03 00 00 00 00 00
*/
len = 0;
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x22, 0x21,
0x0003, 0x0000, NULL, len,
HZ * USB_CTRL_GET_TIMEOUT);
dev_dbg(dev, "result = %d\n", result);
/* send 5 cmd */
/*
* 16.0 CTL a1 21 00 00 00 00 07 00 CLASS 33.1.0
* 16.0 DI 80 25 00 00 00 00 08
*/
len = 0x0007;
result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
0x21, 0xa1,
0x0000, 0x0000, buf, len,
HZ * USB_CTRL_GET_TIMEOUT);
debug_data(dev, __func__, len, buf, result);
/* send 6 cmd */
/*
* 16.0 CTL 21 20 00 00 00 00 07 00 CLASS 34.1.0
* 16.0 DO 80 25 00 00 00 00 08
*/
len = 0x0007;
buf[0] = 0x80;
buf[1] = 0x25;
buf[2] = 0x00;
buf[3] = 0x00;
buf[4] = 0x00;
buf[5] = 0x00;
buf[6] = 0x08;
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x20, 0x21,
0x0000, 0x0000, buf, len,
HZ * USB_CTRL_GET_TIMEOUT);
debug_data(dev, __func__, len, buf, result);
kfree(buf);
return usb_serial_generic_open(tty, port);
}
/*
* CTL 21 22 02 00 00 00 00 00 CLASS 338.1.0
*
* 16.1 DI a1 20 00 00 00 00 02 00 02 00 . ........ 340.1.0
* 16.0 CTL 21 22 03 00 00 00 00 00 CLASS 341.1.0
*
* 16.0 CTL a1 21 00 00 00 00 07 00 CLASS 346.1.0(3)
* 16.0 DI 00 08 07 00 00 00 08 ....... 346.2.0
*
* 16.0 CTL 21 20 00 00 00 00 07 00 CLASS 349.1.0
* 16.0 DO 00 c2 01 00 00 00 08 ....... 349.2.0
*
* 16.0 CTL 21 22 03 00 00 00 00 00 CLASS 350.1.0(2)
*
* 16.0 CTL a1 21 00 00 00 00 07 00 CLASS 352.1.0
* 16.0 DI 00 c2 01 00 00 00 08 ....... 352.2.0
*
* 16.1 DI a1 20 00 00 00 00 02 00 02 00 . ........ 353.1.0
*
* 16.0 CTL 21 20 00 00 00 00 07 00 CLASS 354.1.0
* 16.0 DO 00 c2 01 00 00 00 08 ....... 354.2.0
*
* 16.0 CTL 21 22 03 00 00 00 00 00
*/
static void zte_ev_usb_serial_close(struct usb_serial_port *port)
{
struct usb_device *udev = port->serial->dev;
struct device *dev = &port->dev;
int result = 0;
int len;
unsigned char *buf;
if (port->number != 0)
return;
buf = kmalloc(MAX_SETUP_DATA_SIZE, GFP_KERNEL);
if (!buf)
return;
/* send 1st ctl cmd(CTL 21 22 02 00 00 00 00 00) */
len = 0;
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x22, 0x21,
0x0002, 0x0000, NULL, len,
HZ * USB_CTRL_GET_TIMEOUT);
dev_dbg(dev, "result = %d\n", result);
/* send 2st ctl cmd(CTL 21 22 03 00 00 00 00 00 ) */
len = 0;
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x22, 0x21,
0x0003, 0x0000, NULL, len,
HZ * USB_CTRL_GET_TIMEOUT);
dev_dbg(dev, "result = %d\n", result);
/* send 3st cmd and recieve data */
/*
* 16.0 CTL a1 21 00 00 00 00 07 00 CLASS 25.1.0(5)
* 16.0 DI 00 08 07 00 00 00 08
*/
len = 0x0007;
result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
0x21, 0xa1,
0x0000, 0x0000, buf, len,
HZ * USB_CTRL_GET_TIMEOUT);
debug_data(dev, __func__, len, buf, result);
/* send 4 cmd */
/*
* 16.0 CTL 21 20 00 00 00 00 07 00 CLASS 30.1.0
* 16.0 DO 00 c2 01 00 00 00 08 .%..... 30.2.0
*/
len = 0x0007;
buf[0] = 0x00;
buf[1] = 0xc2;
buf[2] = 0x01;
buf[3] = 0x00;
buf[4] = 0x00;
buf[5] = 0x00;
buf[6] = 0x08;
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x20, 0x21,
0x0000, 0x0000, buf, len,
HZ * USB_CTRL_GET_TIMEOUT);
debug_data(dev, __func__, len, buf, result);
/* send 5 cmd */
/*
* 16.0 CTL 21 22 03 00 00 00 00 00
*/
len = 0;
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x22, 0x21,
0x0003, 0x0000, NULL, len,
HZ * USB_CTRL_GET_TIMEOUT);
dev_dbg(dev, "result = %d\n", result);
/* send 6 cmd */
/*
* 16.0 CTL a1 21 00 00 00 00 07 00 CLASS 33.1.0
* 16.0 DI 00 c2 01 00 00 00 08
*/
len = 0x0007;
result = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
0x21, 0xa1,
0x0000, 0x0000, buf, len,
HZ * USB_CTRL_GET_TIMEOUT);
debug_data(dev, __func__, len, buf, result);
/* send 7 cmd */
/*
* 16.0 CTL 21 20 00 00 00 00 07 00 CLASS 354.1.0
* 16.0 DO 00 c2 01 00 00 00 08 ....... 354.2.0
*/
len = 0x0007;
buf[0] = 0x00;
buf[1] = 0xc2;
buf[2] = 0x01;
buf[3] = 0x00;
buf[4] = 0x00;
buf[5] = 0x00;
buf[6] = 0x08;
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x20, 0x21,
0x0000, 0x0000, buf, len,
HZ * USB_CTRL_GET_TIMEOUT);
debug_data(dev, __func__, len, buf, result);
/* send 8 cmd */
/*
* 16.0 CTL 21 22 03 00 00 00 00 00
*/
len = 0;
result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
0x22, 0x21,
0x0003, 0x0000, NULL, len,
HZ * USB_CTRL_GET_TIMEOUT);
dev_dbg(dev, "result = %d\n", result);
kfree(buf);
usb_serial_generic_close(port);
}
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x19d2, 0xffff) }, /* AC8700 */
{ USB_DEVICE(0x19d2, 0xfffe) },
{ USB_DEVICE(0x19d2, 0xfffd) }, /* MG880 */
{ USB_DEVICE(0x05C6, 0x3197) },
{ USB_DEVICE(0x05C6, 0x6000) },
{ },
};
MODULE_DEVICE_TABLE(usb, id_table);
static struct usb_serial_driver zio_device = {
.driver = {
.owner = THIS_MODULE,
.name = "zte_ev",
},
.id_table = id_table,
.num_ports = 1,
.open = zte_ev_usb_serial_open,
.close = zte_ev_usb_serial_close,
};
static struct usb_serial_driver * const serial_drivers[] = {
&zio_device, NULL
};
module_usb_serial_driver(serial_drivers, id_table);
MODULE_LICENSE("GPL v2");