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2ec6f246c3
linux-next/drivers/input/touchscreen/usbtouchscreen.c
Nuno Lucas 2ec6f246c3 Input: usbtouchscreen - fix TSC-10 DM USB controllers without EEPROM 
The usbtouchscreen module implements a driver for the TSC-10 DM USB
touchscreen controllers, but assumes a 2-byte response for the
CMD_RESET and CMD_RATE commands, when they can be only a single byte
when no EEPROM is connected.

The driver worked with an earlier controller revision, but new
revisions of the controller fail.

It seems the problem is that the early controller had the
SEL4/EEPROM-CS pin high, but the new controller has it down, making
the response different.

Without the fix, the controller would answer the single byte 0x06
(ACK), making the init fail with -ENODEV because buf[1] is 0xFF (as
initialized before).

As the single byte is the only thing we need to check it was ok, there
is no need to verify the second byte.

The [0x15 0x01] case is the NAK [0x15] response for when there is no
data in the EEPROM [bit-0 of second byte set], so I let that be, as I
don't have any controller with an EEPROM.

With this patch, both the earlier and latest controller work the same.

Note: This was previously submited as BUG #11961 [1] on the bugzilla
tracker, but rebased to version 2.6.27.4 and with unnecessary comments
and printk's removed.

[1] http://bugzilla.kernel.org/show_bug.cgi?id=11961

Signed-off-by: Nuno Lucas <ntlucas@gmail.com>
Acked-by: Daniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-11-19 16:53:58 -05:00

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/******************************************************************************
* usbtouchscreen.c
* Driver for USB Touchscreens, supporting those devices:
* - eGalax Touchkit
* includes eTurboTouch CT-410/510/700
* - 3M/Microtouch EX II series
* - ITM
* - PanJit TouchSet
* - eTurboTouch
* - Gunze AHL61
* - DMC TSC-10/25
* - IRTOUCHSYSTEMS/UNITOP
* - IdealTEK URTC1000
* - General Touch
* - GoTop Super_Q2/GogoPen/PenPower tablets
*
* Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
* Copyright (C) by Todd E. Johnson (mtouchusb.c)
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Driver is based on touchkitusb.c
* - ITM parts are from itmtouch.c
* - 3M parts are from mtouchusb.c
* - PanJit parts are from an unmerged driver by Lanslott Gish
* - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
* driver from Marius Vollmer
*
*****************************************************************************/
//#define DEBUG
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/usb.h>
#include <linux/usb/input.h>
#include <linux/hid.h>
#define DRIVER_VERSION "v0.6"
#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
#define DRIVER_DESC "USB Touchscreen Driver"
static int swap_xy;
module_param(swap_xy, bool, 0644);
MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
/* device specifc data/functions */
struct usbtouch_usb;
struct usbtouch_device_info {
int min_xc, max_xc;
int min_yc, max_yc;
int min_press, max_press;
int rept_size;
void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
/*
* used to get the packet len. possible return values:
* > 0: packet len
* = 0: skip one byte
* < 0: -return value more bytes needed
*/
int (*get_pkt_len) (unsigned char *pkt, int len);
int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
int (*init) (struct usbtouch_usb *usbtouch);
};
/* a usbtouch device */
struct usbtouch_usb {
unsigned char *data;
dma_addr_t data_dma;
unsigned char *buffer;
int buf_len;
struct urb *irq;
struct usb_device *udev;
struct input_dev *input;
struct usbtouch_device_info *type;
char name[128];
char phys[64];
int x, y;
int touch, press;
};
/* device types */
enum {
DEVTYPE_IGNORE = -1,
DEVTYPE_EGALAX,
DEVTYPE_PANJIT,
DEVTYPE_3M,
DEVTYPE_ITM,
DEVTYPE_ETURBO,
DEVTYPE_GUNZE,
DEVTYPE_DMC_TSC10,
DEVTYPE_IRTOUCH,
DEVTYPE_IDEALTEK,
DEVTYPE_GENERAL_TOUCH,
DEVTYPE_GOTOP,
};
#define USB_DEVICE_HID_CLASS(vend, prod) \
.match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
| USB_DEVICE_ID_MATCH_DEVICE, \
.idVendor = (vend), \
.idProduct = (prod), \
.bInterfaceClass = USB_INTERFACE_CLASS_HID, \
.bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
static struct usb_device_id usbtouch_devices[] = {
#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
/* ignore the HID capable devices, handled by usbhid */
{USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
{USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
/* normal device IDs */
{USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
{USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
{USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
{USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
{USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
{USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_3M
{USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ITM
{USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
{USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
{USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
{USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
{USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
{USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
{USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
{USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
{USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
{USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
{USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
#endif
{}
};
/*****************************************************************************
* eGalax part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
#ifndef MULTI_PACKET
#define MULTI_PACKET
#endif
#define EGALAX_PKT_TYPE_MASK 0xFE
#define EGALAX_PKT_TYPE_REPT 0x80
#define EGALAX_PKT_TYPE_DIAG 0x0A
static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
return 0;
dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
dev->touch = pkt[0] & 0x01;
return 1;
}
static int egalax_get_pkt_len(unsigned char *buf, int len)
{
switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
case EGALAX_PKT_TYPE_REPT:
return 5;
case EGALAX_PKT_TYPE_DIAG:
if (len < 2)
return -1;
return buf[1] + 2;
}
return 0;
}
#endif
/*****************************************************************************
* PanJit Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
dev->touch = pkt[0] & 0x01;
return 1;
}
#endif
/*****************************************************************************
* 3M/Microtouch Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_3M
#define MTOUCHUSB_ASYNC_REPORT 1
#define MTOUCHUSB_RESET 7
#define MTOUCHUSB_REQ_CTRLLR_ID 10
static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = (pkt[8] << 8) | pkt[7];
dev->y = (pkt[10] << 8) | pkt[9];
dev->touch = (pkt[2] & 0x40) ? 1 : 0;
return 1;
}
static int mtouch_init(struct usbtouch_usb *usbtouch)
{
int ret, i;
ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
MTOUCHUSB_RESET,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
__func__, ret);
if (ret < 0)
return ret;
msleep(150);
for (i = 0; i < 3; i++) {
ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
MTOUCHUSB_ASYNC_REPORT,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
__func__, ret);
if (ret >= 0)
break;
if (ret != -EPIPE)
return ret;
}
return 0;
}
#endif
/*****************************************************************************
* ITM Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_ITM
static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
int touch;
/*
* ITM devices report invalid x/y data if not touched.
* if the screen was touched before but is not touched any more
* report touch as 0 with the last valid x/y data once. then stop
* reporting data until touched again.
*/
dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
touch = ~pkt[7] & 0x20;
if (!touch) {
if (dev->touch) {
dev->touch = 0;
return 1;
}
return 0;
}
dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
dev->touch = touch;
return 1;
}
#endif
/*****************************************************************************
* eTurboTouch part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
#ifndef MULTI_PACKET
#define MULTI_PACKET
#endif
static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
unsigned int shift;
/* packets should start with sync */
if (!(pkt[0] & 0x80))
return 0;
shift = (6 - (pkt[0] & 0x03));
dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
dev->touch = (pkt[0] & 0x10) ? 1 : 0;
return 1;
}
static int eturbo_get_pkt_len(unsigned char *buf, int len)
{
if (buf[0] & 0x80)
return 5;
if (buf[0] == 0x01)
return 3;
return 0;
}
#endif
/*****************************************************************************
* Gunze part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
return 0;
dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
dev->touch = pkt[0] & 0x20;
return 1;
}
#endif
/*****************************************************************************
* DMC TSC-10/25 Part
*
* Documentation about the controller and it's protocol can be found at
* http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
* http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
*/
#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
/* supported data rates. currently using 130 */
#define TSC10_RATE_POINT 0x50
#define TSC10_RATE_30 0x40
#define TSC10_RATE_50 0x41
#define TSC10_RATE_80 0x42
#define TSC10_RATE_100 0x43
#define TSC10_RATE_130 0x44
#define TSC10_RATE_150 0x45
/* commands */
#define TSC10_CMD_RESET 0x55
#define TSC10_CMD_RATE 0x05
#define TSC10_CMD_DATA1 0x01
static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
{
struct usb_device *dev = usbtouch->udev;
int ret = -ENOMEM;
unsigned char *buf;
buf = kmalloc(2, GFP_KERNEL);
if (!buf)
goto err_nobuf;
/* reset */
buf[0] = buf[1] = 0xFF;
ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
TSC10_CMD_RESET,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
if (ret < 0)
goto err_out;
if (buf[0] != 0x06) {
ret = -ENODEV;
goto err_out;
}
/* set coordinate output rate */
buf[0] = buf[1] = 0xFF;
ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
TSC10_CMD_RATE,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
if (ret < 0)
goto err_out;
if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
ret = -ENODEV;
goto err_out;
}
/* start sending data */
ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
TSC10_CMD_DATA1,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
err_out:
kfree(buf);
err_nobuf:
return ret;
}
static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
dev->touch = pkt[0] & 0x01;
return 1;
}
#endif
/*****************************************************************************
* IRTOUCH Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = (pkt[3] << 8) | pkt[2];
dev->y = (pkt[5] << 8) | pkt[4];
dev->touch = (pkt[1] & 0x03) ? 1 : 0;
return 1;
}
#endif
/*****************************************************************************
* IdealTEK URTC1000 Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
#ifndef MULTI_PACKET
#define MULTI_PACKET
#endif
static int idealtek_get_pkt_len(unsigned char *buf, int len)
{
if (buf[0] & 0x80)
return 5;
if (buf[0] == 0x01)
return len;
return 0;
}
static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
switch (pkt[0] & 0x98) {
case 0x88:
/* touch data in IdealTEK mode */
dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
dev->touch = (pkt[0] & 0x40) ? 1 : 0;
return 1;
case 0x98:
/* touch data in MT emulation mode */
dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
dev->touch = (pkt[0] & 0x40) ? 1 : 0;
return 1;
default:
return 0;
}
}
#endif
/*****************************************************************************
* General Touch Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1] ;
dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3] ;
dev->press = pkt[5] & 0xff;
dev->touch = pkt[0] & 0x01;
return 1;
}
#endif
/*****************************************************************************
* GoTop Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
dev->touch = pkt[0] & 0x01;
return 1;
}
#endif
/*****************************************************************************
* the different device descriptors
*/
#ifdef MULTI_PACKET
static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
unsigned char *pkt, int len);
#endif
static struct usbtouch_device_info usbtouch_dev_info[] = {
#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
[DEVTYPE_EGALAX] = {
.min_xc = 0x0,
.max_xc = 0x07ff,
.min_yc = 0x0,
.max_yc = 0x07ff,
.rept_size = 16,
.process_pkt = usbtouch_process_multi,
.get_pkt_len = egalax_get_pkt_len,
.read_data = egalax_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
[DEVTYPE_PANJIT] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.rept_size = 8,
.read_data = panjit_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_3M
[DEVTYPE_3M] = {
.min_xc = 0x0,
.max_xc = 0x4000,
.min_yc = 0x0,
.max_yc = 0x4000,
.rept_size = 11,
.read_data = mtouch_read_data,
.init = mtouch_init,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ITM
[DEVTYPE_ITM] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.max_press = 0xff,
.rept_size = 8,
.read_data = itm_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
[DEVTYPE_ETURBO] = {
.min_xc = 0x0,
.max_xc = 0x07ff,
.min_yc = 0x0,
.max_yc = 0x07ff,
.rept_size = 8,
.process_pkt = usbtouch_process_multi,
.get_pkt_len = eturbo_get_pkt_len,
.read_data = eturbo_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
[DEVTYPE_GUNZE] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.rept_size = 4,
.read_data = gunze_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
[DEVTYPE_DMC_TSC10] = {
.min_xc = 0x0,
.max_xc = 0x03ff,
.min_yc = 0x0,
.max_yc = 0x03ff,
.rept_size = 5,
.init = dmc_tsc10_init,
.read_data = dmc_tsc10_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
[DEVTYPE_IRTOUCH] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.rept_size = 8,
.read_data = irtouch_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
[DEVTYPE_IDEALTEK] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.rept_size = 8,
.process_pkt = usbtouch_process_multi,
.get_pkt_len = idealtek_get_pkt_len,
.read_data = idealtek_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
[DEVTYPE_GENERAL_TOUCH] = {
.min_xc = 0x0,
.max_xc = 0x0500,
.min_yc = 0x0,
.max_yc = 0x0500,
.rept_size = 7,
.read_data = general_touch_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
[DEVTYPE_GOTOP] = {
.min_xc = 0x0,
.max_xc = 0x03ff,
.min_yc = 0x0,
.max_yc = 0x03ff,
.rept_size = 4,
.read_data = gotop_read_data,
},
#endif
};
/*****************************************************************************
* Generic Part
*/
static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
unsigned char *pkt, int len)
{
struct usbtouch_device_info *type = usbtouch->type;
if (!type->read_data(usbtouch, pkt))
return;
input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
if (swap_xy) {
input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
} else {
input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
}
if (type->max_press)
input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
input_sync(usbtouch->input);
}
#ifdef MULTI_PACKET
static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
unsigned char *pkt, int len)
{
unsigned char *buffer;
int pkt_len, pos, buf_len, tmp;
/* process buffer */
if (unlikely(usbtouch->buf_len)) {
/* try to get size */
pkt_len = usbtouch->type->get_pkt_len(
usbtouch->buffer, usbtouch->buf_len);
/* drop? */
if (unlikely(!pkt_len))
goto out_flush_buf;
/* need to append -pkt_len bytes before able to get size */
if (unlikely(pkt_len < 0)) {
int append = -pkt_len;
if (unlikely(append > len))
append = len;
if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
goto out_flush_buf;
memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
usbtouch->buf_len += append;
pkt_len = usbtouch->type->get_pkt_len(
usbtouch->buffer, usbtouch->buf_len);
if (pkt_len < 0)
return;
}
/* append */
tmp = pkt_len - usbtouch->buf_len;
if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
goto out_flush_buf;
memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
buffer = pkt + tmp;
buf_len = len - tmp;
} else {
buffer = pkt;
buf_len = len;
}
/* loop over the received packet, process */
pos = 0;
while (pos < buf_len) {
/* get packet len */
pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
buf_len - pos);
/* unknown packet: skip one byte */
if (unlikely(!pkt_len)) {
pos++;
continue;
}
/* full packet: process */
if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
} else {
/* incomplete packet: save in buffer */
memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
usbtouch->buf_len = buf_len - pos;
return;
}
pos += pkt_len;
}
out_flush_buf:
usbtouch->buf_len = 0;
return;
}
#endif
static void usbtouch_irq(struct urb *urb)
{
struct usbtouch_usb *usbtouch = urb->context;
int retval;
switch (urb->status) {
case 0:
/* success */
break;
case -ETIME:
/* this urb is timing out */
dbg("%s - urb timed out - was the device unplugged?",
__func__);
return;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* this urb is terminated, clean up */
dbg("%s - urb shutting down with status: %d",
__func__, urb->status);
return;
default:
dbg("%s - nonzero urb status received: %d",
__func__, urb->status);
goto exit;
}
usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
exit:
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval)
err("%s - usb_submit_urb failed with result: %d",
__func__, retval);
}
static int usbtouch_open(struct input_dev *input)
{
struct usbtouch_usb *usbtouch = input_get_drvdata(input);
usbtouch->irq->dev = usbtouch->udev;
if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
return -EIO;
return 0;
}
static void usbtouch_close(struct input_dev *input)
{
struct usbtouch_usb *usbtouch = input_get_drvdata(input);
usb_kill_urb(usbtouch->irq);
}
static void usbtouch_free_buffers(struct usb_device *udev,
struct usbtouch_usb *usbtouch)
{
usb_buffer_free(udev, usbtouch->type->rept_size,
usbtouch->data, usbtouch->data_dma);
kfree(usbtouch->buffer);
}
static int usbtouch_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usbtouch_usb *usbtouch;
struct input_dev *input_dev;
struct usb_host_interface *interface;
struct usb_endpoint_descriptor *endpoint;
struct usb_device *udev = interface_to_usbdev(intf);
struct usbtouch_device_info *type;
int err = -ENOMEM;
/* some devices are ignored */
if (id->driver_info == DEVTYPE_IGNORE)
return -ENODEV;
interface = intf->cur_altsetting;
endpoint = &interface->endpoint[0].desc;
usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
input_dev = input_allocate_device();
if (!usbtouch || !input_dev)
goto out_free;
type = &usbtouch_dev_info[id->driver_info];
usbtouch->type = type;
if (!type->process_pkt)
type->process_pkt = usbtouch_process_pkt;
usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
GFP_KERNEL, &usbtouch->data_dma);
if (!usbtouch->data)
goto out_free;
if (type->get_pkt_len) {
usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
if (!usbtouch->buffer)
goto out_free_buffers;
}
usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
if (!usbtouch->irq) {
dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
goto out_free_buffers;
}
usbtouch->udev = udev;
usbtouch->input = input_dev;
if (udev->manufacturer)
strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
if (udev->product) {
if (udev->manufacturer)
strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
}
if (!strlen(usbtouch->name))
snprintf(usbtouch->name, sizeof(usbtouch->name),
"USB Touchscreen %04x:%04x",
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
input_dev->name = usbtouch->name;
input_dev->phys = usbtouch->phys;
usb_to_input_id(udev, &input_dev->id);
input_dev->dev.parent = &intf->dev;
input_set_drvdata(input_dev, usbtouch);
input_dev->open = usbtouch_open;
input_dev->close = usbtouch_close;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
if (type->max_press)
input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
type->max_press, 0, 0);
usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress),
usbtouch->data, type->rept_size,
usbtouch_irq, usbtouch, endpoint->bInterval);
usbtouch->irq->dev = usbtouch->udev;
usbtouch->irq->transfer_dma = usbtouch->data_dma;
usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
/* device specific init */
if (type->init) {
err = type->init(usbtouch);
if (err) {
dbg("%s - type->init() failed, err: %d", __func__, err);
goto out_free_buffers;
}
}
err = input_register_device(usbtouch->input);
if (err) {
dbg("%s - input_register_device failed, err: %d", __func__, err);
goto out_free_buffers;
}
usb_set_intfdata(intf, usbtouch);
return 0;
out_free_buffers:
usbtouch_free_buffers(udev, usbtouch);
out_free:
input_free_device(input_dev);
kfree(usbtouch);
return err;
}
static void usbtouch_disconnect(struct usb_interface *intf)
{
struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
dbg("%s - called", __func__);
if (!usbtouch)
return;
dbg("%s - usbtouch is initialized, cleaning up", __func__);
usb_set_intfdata(intf, NULL);
usb_kill_urb(usbtouch->irq);
input_unregister_device(usbtouch->input);
usb_free_urb(usbtouch->irq);
usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
kfree(usbtouch);
}
MODULE_DEVICE_TABLE(usb, usbtouch_devices);
static struct usb_driver usbtouch_driver = {
.name = "usbtouchscreen",
.probe = usbtouch_probe,
.disconnect = usbtouch_disconnect,
.id_table = usbtouch_devices,
};
static int __init usbtouch_init(void)
{
return usb_register(&usbtouch_driver);
}
static void __exit usbtouch_cleanup(void)
{
usb_deregister(&usbtouch_driver);
}
module_init(usbtouch_init);
module_exit(usbtouch_cleanup);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_ALIAS("touchkitusb");
MODULE_ALIAS("itmtouch");
MODULE_ALIAS("mtouchusb");
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