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linux/drivers/input/touchscreen/usbtouchscreen.c
Greg Kroah-Hartman 0a5ebc88c7 USB: input: usbtouchscreen.c: fix up dev_* messages 
Previously I had made the struct device point to the input device, but
after talking with Dmitry, he said that the USB device would make more
sense for this driver to point to.  So converted it to use that instead.

CC: Dmitry Torokhov <dmitry.torokhov@gmail.com>
CC: Henrik Rydberg <rydberg@euromail.se>
CC: Rusty Russell <rusty@rustcorp.com.au>
CC: Viresh Kumar <viresh.kumar@st.com>
CC: Armando Visconti <armando.visconti@st.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-05-04 15:33:16 -07:00

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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
* - JASTEC USB touch controller/DigiTech DTR-02U
* - Zytronic capacitive touchscreen
* - NEXIO/iNexio
* - Elo TouchSystems 2700 IntelliTouch
* - EasyTouch USB Dual/Multi touch controller from Data Modul
*
* 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 bool swap_xy;
module_param(swap_xy, bool, 0644);
MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
static bool hwcalib_xy;
module_param(hwcalib_xy, bool, 0644);
MODULE_PARM_DESC(hwcalib_xy, "If set hw-calibrated X/Y are used if available");
/* 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;
/*
* Always service the USB devices irq not just when the input device is
* open. This is useful when devices have a watchdog which prevents us
* from periodically polling the device. Leave this unset unless your
* touchscreen device requires it, as it does consume more of the USB
* bandwidth.
*/
bool irq_always;
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 (*alloc) (struct usbtouch_usb *usbtouch);
int (*init) (struct usbtouch_usb *usbtouch);
void (*exit) (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_interface *interface;
struct input_dev *input;
struct usbtouch_device_info *type;
char name[128];
char phys[64];
void *priv;
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,
DEVTYPE_JASTEC,
DEVTYPE_E2I,
DEVTYPE_ZYTRONIC,
DEVTYPE_TC45USB,
DEVTYPE_NEXIO,
DEVTYPE_ELO,
DEVTYPE_ETOUCH,
};
#define USB_DEVICE_HID_CLASS(vend, prod) \
.match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
| USB_DEVICE_ID_MATCH_INT_PROTOCOL \
| USB_DEVICE_ID_MATCH_DEVICE, \
.idVendor = (vend), \
.idProduct = (prod), \
.bInterfaceClass = USB_INTERFACE_CLASS_HID, \
.bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
static const 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},
{USB_DEVICE(0x16e3, 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
#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
{USB_DEVICE(0x0f92, 0x0001), .driver_info = DEVTYPE_JASTEC},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_E2I
{USB_DEVICE(0x1ac7, 0x0001), .driver_info = DEVTYPE_E2I},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
{USB_DEVICE(0x14c8, 0x0003), .driver_info = DEVTYPE_ZYTRONIC},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
/* TC5UH */
{USB_DEVICE(0x0664, 0x0309), .driver_info = DEVTYPE_TC45USB},
/* TC4UM */
{USB_DEVICE(0x0664, 0x0306), .driver_info = DEVTYPE_TC45USB},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
/* data interface only */
{USB_DEVICE_AND_INTERFACE_INFO(0x10f0, 0x2002, 0x0a, 0x00, 0x00),
.driver_info = DEVTYPE_NEXIO},
{USB_DEVICE_AND_INTERFACE_INFO(0x1870, 0x0001, 0x0a, 0x00, 0x00),
.driver_info = DEVTYPE_NEXIO},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ELO
{USB_DEVICE(0x04e7, 0x0020), .driver_info = DEVTYPE_ELO},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
{USB_DEVICE(0x7374, 0x0001), .driver_info = DEVTYPE_ETOUCH},
#endif
{}
};
/*****************************************************************************
* e2i Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_E2I
static int e2i_init(struct usbtouch_usb *usbtouch)
{
int ret;
struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
0x01, 0x02, 0x0000, 0x0081,
NULL, 0, USB_CTRL_SET_TIMEOUT);
dev_dbg(&usbtouch->interface->dev,
"%s - usb_control_msg - E2I_RESET - bytes|err: %d\n",
__func__, ret);
return ret;
}
static int e2i_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
int tmp = (pkt[0] << 8) | pkt[1];
dev->x = (pkt[2] << 8) | pkt[3];
dev->y = (pkt[4] << 8) | pkt[5];
tmp = tmp - 0xA000;
dev->touch = (tmp > 0);
dev->press = (tmp > 0 ? tmp : 0);
return 1;
}
#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
/*****************************************************************************
* EasyTouch part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
#ifndef MULTI_PACKET
#define MULTI_PACKET
#endif
#define ETOUCH_PKT_TYPE_MASK 0xFE
#define ETOUCH_PKT_TYPE_REPT 0x80
#define ETOUCH_PKT_TYPE_REPT2 0xB0
#define ETOUCH_PKT_TYPE_DIAG 0x0A
static int etouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
if ((pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT &&
(pkt[0] & ETOUCH_PKT_TYPE_MASK) != ETOUCH_PKT_TYPE_REPT2)
return 0;
dev->x = ((pkt[1] & 0x1F) << 7) | (pkt[2] & 0x7F);
dev->y = ((pkt[3] & 0x1F) << 7) | (pkt[4] & 0x7F);
dev->touch = pkt[0] & 0x01;
return 1;
}
static int etouch_get_pkt_len(unsigned char *buf, int len)
{
switch (buf[0] & ETOUCH_PKT_TYPE_MASK) {
case ETOUCH_PKT_TYPE_REPT:
case ETOUCH_PKT_TYPE_REPT2:
return 5;
case ETOUCH_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)
{
if (hwcalib_xy) {
dev->x = (pkt[4] << 8) | pkt[3];
dev->y = 0xffff - ((pkt[6] << 8) | pkt[5]);
} else {
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;
struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
MTOUCHUSB_RESET,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
dev_dbg(&usbtouch->interface->dev,
"%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d\n",
__func__, ret);
if (ret < 0)
return ret;
msleep(150);
for (i = 0; i < 3; i++) {
ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
MTOUCHUSB_ASYNC_REPORT,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
dev_dbg(&usbtouch->interface->dev,
"%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d\n",
__func__, ret);
if (ret >= 0)
break;
if (ret != -EPIPE)
return ret;
}
/* Default min/max xy are the raw values, override if using hw-calib */
if (hwcalib_xy) {
input_set_abs_params(usbtouch->input, ABS_X, 0, 0xffff, 0, 0);
input_set_abs_params(usbtouch->input, ABS_Y, 0, 0xffff, 0, 0);
}
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 = interface_to_usbdev(usbtouch->interface);
int ret = -ENOMEM;
unsigned char *buf;
buf = kmalloc(2, GFP_NOIO);
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
/*****************************************************************************
* ET&T TC5UH/TC4UM part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
static int tc45usb_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
/*****************************************************************************
* 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] << 8) | pkt[1];
dev->y = (pkt[4] << 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
/*****************************************************************************
* JASTEC Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
static int jastec_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
dev->x = ((pkt[0] & 0x3f) << 6) | (pkt[2] & 0x3f);
dev->y = ((pkt[1] & 0x3f) << 6) | (pkt[3] & 0x3f);
dev->touch = (pkt[0] & 0x40) >> 6;
return 1;
}
#endif
/*****************************************************************************
* Zytronic Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
static int zytronic_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
struct usb_interface *intf = dev->interface;
switch (pkt[0]) {
case 0x3A: /* command response */
dev_dbg(&intf->dev, "%s: Command response %d\n", __func__, pkt[1]);
break;
case 0xC0: /* down */
dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
dev->touch = 1;
dev_dbg(&intf->dev, "%s: down %d,%d\n", __func__, dev->x, dev->y);
return 1;
case 0x80: /* up */
dev->x = (pkt[1] & 0x7f) | ((pkt[2] & 0x07) << 7);
dev->y = (pkt[3] & 0x7f) | ((pkt[4] & 0x07) << 7);
dev->touch = 0;
dev_dbg(&intf->dev, "%s: up %d,%d\n", __func__, dev->x, dev->y);
return 1;
default:
dev_dbg(&intf->dev, "%s: Unknown return %d\n", __func__, pkt[0]);
break;
}
return 0;
}
#endif
/*****************************************************************************
* NEXIO Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
#define NEXIO_TIMEOUT 5000
#define NEXIO_BUFSIZE 1024
#define NEXIO_THRESHOLD 50
struct nexio_priv {
struct urb *ack;
unsigned char *ack_buf;
};
struct nexio_touch_packet {
u8 flags; /* 0xe1 = touch, 0xe1 = release */
__be16 data_len; /* total bytes of touch data */
__be16 x_len; /* bytes for X axis */
__be16 y_len; /* bytes for Y axis */
u8 data[];
} __attribute__ ((packed));
static unsigned char nexio_ack_pkt[2] = { 0xaa, 0x02 };
static unsigned char nexio_init_pkt[4] = { 0x82, 0x04, 0x0a, 0x0f };
static void nexio_ack_complete(struct urb *urb)
{
}
static int nexio_alloc(struct usbtouch_usb *usbtouch)
{
struct nexio_priv *priv;
int ret = -ENOMEM;
usbtouch->priv = kmalloc(sizeof(struct nexio_priv), GFP_KERNEL);
if (!usbtouch->priv)
goto out_buf;
priv = usbtouch->priv;
priv->ack_buf = kmemdup(nexio_ack_pkt, sizeof(nexio_ack_pkt),
GFP_KERNEL);
if (!priv->ack_buf)
goto err_priv;
priv->ack = usb_alloc_urb(0, GFP_KERNEL);
if (!priv->ack) {
dev_dbg(&usbtouch->interface->dev,
"%s - usb_alloc_urb failed: usbtouch->ack\n", __func__);
goto err_ack_buf;
}
return 0;
err_ack_buf:
kfree(priv->ack_buf);
err_priv:
kfree(priv);
out_buf:
return ret;
}
static int nexio_init(struct usbtouch_usb *usbtouch)
{
struct usb_device *dev = interface_to_usbdev(usbtouch->interface);
struct usb_host_interface *interface = usbtouch->interface->cur_altsetting;
struct nexio_priv *priv = usbtouch->priv;
int ret = -ENOMEM;
int actual_len, i;
unsigned char *buf;
char *firmware_ver = NULL, *device_name = NULL;
int input_ep = 0, output_ep = 0;
/* find first input and output endpoint */
for (i = 0; i < interface->desc.bNumEndpoints; i++) {
if (!input_ep &&
usb_endpoint_dir_in(&interface->endpoint[i].desc))
input_ep = interface->endpoint[i].desc.bEndpointAddress;
if (!output_ep &&
usb_endpoint_dir_out(&interface->endpoint[i].desc))
output_ep = interface->endpoint[i].desc.bEndpointAddress;
}
if (!input_ep || !output_ep)
return -ENXIO;
buf = kmalloc(NEXIO_BUFSIZE, GFP_NOIO);
if (!buf)
goto out_buf;
/* two empty reads */
for (i = 0; i < 2; i++) {
ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
buf, NEXIO_BUFSIZE, &actual_len,
NEXIO_TIMEOUT);
if (ret < 0)
goto out_buf;
}
/* send init command */
memcpy(buf, nexio_init_pkt, sizeof(nexio_init_pkt));
ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, output_ep),
buf, sizeof(nexio_init_pkt), &actual_len,
NEXIO_TIMEOUT);
if (ret < 0)
goto out_buf;
/* read replies */
for (i = 0; i < 3; i++) {
memset(buf, 0, NEXIO_BUFSIZE);
ret = usb_bulk_msg(dev, usb_rcvbulkpipe(dev, input_ep),
buf, NEXIO_BUFSIZE, &actual_len,
NEXIO_TIMEOUT);
if (ret < 0 || actual_len < 1 || buf[1] != actual_len)
continue;
switch (buf[0]) {
case 0x83: /* firmware version */
if (!firmware_ver)
firmware_ver = kstrdup(&buf[2], GFP_NOIO);
break;
case 0x84: /* device name */
if (!device_name)
device_name = kstrdup(&buf[2], GFP_NOIO);
break;
}
}
printk(KERN_INFO "Nexio device: %s, firmware version: %s\n",
device_name, firmware_ver);
kfree(firmware_ver);
kfree(device_name);
usb_fill_bulk_urb(priv->ack, dev, usb_sndbulkpipe(dev, output_ep),
priv->ack_buf, sizeof(nexio_ack_pkt),
nexio_ack_complete, usbtouch);
ret = 0;
out_buf:
kfree(buf);
return ret;
}
static void nexio_exit(struct usbtouch_usb *usbtouch)
{
struct nexio_priv *priv = usbtouch->priv;
usb_kill_urb(priv->ack);
usb_free_urb(priv->ack);
kfree(priv->ack_buf);
kfree(priv);
}
static int nexio_read_data(struct usbtouch_usb *usbtouch, unsigned char *pkt)
{
struct nexio_touch_packet *packet = (void *) pkt;
struct nexio_priv *priv = usbtouch->priv;
unsigned int data_len = be16_to_cpu(packet->data_len);
unsigned int x_len = be16_to_cpu(packet->x_len);
unsigned int y_len = be16_to_cpu(packet->y_len);
int x, y, begin_x, begin_y, end_x, end_y, w, h, ret;
/* got touch data? */
if ((pkt[0] & 0xe0) != 0xe0)
return 0;
if (data_len > 0xff)
data_len -= 0x100;
if (x_len > 0xff)
x_len -= 0x80;
/* send ACK */
ret = usb_submit_urb(priv->ack, GFP_ATOMIC);
if (!usbtouch->type->max_xc) {
usbtouch->type->max_xc = 2 * x_len;
input_set_abs_params(usbtouch->input, ABS_X,
0, usbtouch->type->max_xc, 0, 0);
usbtouch->type->max_yc = 2 * y_len;
input_set_abs_params(usbtouch->input, ABS_Y,
0, usbtouch->type->max_yc, 0, 0);
}
/*
* The device reports state of IR sensors on X and Y axes.
* Each byte represents "darkness" percentage (0-100) of one element.
* 17" touchscreen reports only 64 x 52 bytes so the resolution is low.
* This also means that there's a limited multi-touch capability but
* it's disabled (and untested) here as there's no X driver for that.
*/
begin_x = end_x = begin_y = end_y = -1;
for (x = 0; x < x_len; x++) {
if (begin_x == -1 && packet->data[x] > NEXIO_THRESHOLD) {
begin_x = x;
continue;
}
if (end_x == -1 && begin_x != -1 && packet->data[x] < NEXIO_THRESHOLD) {
end_x = x - 1;
for (y = x_len; y < data_len; y++) {
if (begin_y == -1 && packet->data[y] > NEXIO_THRESHOLD) {
begin_y = y - x_len;
continue;
}
if (end_y == -1 &&
begin_y != -1 && packet->data[y] < NEXIO_THRESHOLD) {
end_y = y - 1 - x_len;
w = end_x - begin_x;
h = end_y - begin_y;
#if 0
/* multi-touch */
input_report_abs(usbtouch->input,
ABS_MT_TOUCH_MAJOR, max(w,h));
input_report_abs(usbtouch->input,
ABS_MT_TOUCH_MINOR, min(x,h));
input_report_abs(usbtouch->input,
ABS_MT_POSITION_X, 2*begin_x+w);
input_report_abs(usbtouch->input,
ABS_MT_POSITION_Y, 2*begin_y+h);
input_report_abs(usbtouch->input,
ABS_MT_ORIENTATION, w > h);
input_mt_sync(usbtouch->input);
#endif
/* single touch */
usbtouch->x = 2 * begin_x + w;
usbtouch->y = 2 * begin_y + h;
usbtouch->touch = packet->flags & 0x01;
begin_y = end_y = -1;
return 1;
}
}
begin_x = end_x = -1;
}
}
return 0;
}
#endif
/*****************************************************************************
* ELO part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_ELO
static int elo_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[6] > 0;
dev->press = pkt[6];
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_ELO
[DEVTYPE_ELO] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.max_press = 0xff,
.rept_size = 8,
.read_data = elo_read_data,
},
#endif
#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 = 0x7fff,
.min_yc = 0x0,
.max_yc = 0x7fff,
.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
#ifdef CONFIG_TOUCHSCREEN_USB_JASTEC
[DEVTYPE_JASTEC] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.rept_size = 4,
.read_data = jastec_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_E2I
[DEVTYPE_E2I] = {
.min_xc = 0x0,
.max_xc = 0x7fff,
.min_yc = 0x0,
.max_yc = 0x7fff,
.rept_size = 6,
.init = e2i_init,
.read_data = e2i_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ZYTRONIC
[DEVTYPE_ZYTRONIC] = {
.min_xc = 0x0,
.max_xc = 0x03ff,
.min_yc = 0x0,
.max_yc = 0x03ff,
.rept_size = 5,
.read_data = zytronic_read_data,
.irq_always = true,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_ETT_TC45USB
[DEVTYPE_TC45USB] = {
.min_xc = 0x0,
.max_xc = 0x0fff,
.min_yc = 0x0,
.max_yc = 0x0fff,
.rept_size = 5,
.read_data = tc45usb_read_data,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_NEXIO
[DEVTYPE_NEXIO] = {
.rept_size = 1024,
.irq_always = true,
.read_data = nexio_read_data,
.alloc = nexio_alloc,
.init = nexio_init,
.exit = nexio_exit,
},
#endif
#ifdef CONFIG_TOUCHSCREEN_USB_EASYTOUCH
[DEVTYPE_ETOUCH] = {
.min_xc = 0x0,
.max_xc = 0x07ff,
.min_yc = 0x0,
.max_yc = 0x07ff,
.rept_size = 16,
.process_pkt = usbtouch_process_multi,
.get_pkt_len = etouch_get_pkt_len,
.read_data = etouch_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;
struct device *dev = &usbtouch->interface->dev;
int retval;
switch (urb->status) {
case 0:
/* success */
break;
case -ETIME:
/* this urb is timing out */
dev_dbg(dev,
"%s - urb timed out - was the device unplugged?\n",
__func__);
return;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
case -EPIPE:
/* this urb is terminated, clean up */
dev_dbg(dev, "%s - urb shutting down with status: %d\n",
__func__, urb->status);
return;
default:
dev_dbg(dev, "%s - nonzero urb status received: %d\n",
__func__, urb->status);
goto exit;
}
usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
exit:
usb_mark_last_busy(interface_to_usbdev(usbtouch->interface));
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval)
dev_err(dev, "%s - usb_submit_urb failed with result: %d\n",
__func__, retval);
}
static int usbtouch_open(struct input_dev *input)
{
struct usbtouch_usb *usbtouch = input_get_drvdata(input);
int r;
usbtouch->irq->dev = interface_to_usbdev(usbtouch->interface);
r = usb_autopm_get_interface(usbtouch->interface) ? -EIO : 0;
if (r < 0)
goto out;
if (!usbtouch->type->irq_always) {
if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) {
r = -EIO;
goto out_put;
}
}
usbtouch->interface->needs_remote_wakeup = 1;
out_put:
usb_autopm_put_interface(usbtouch->interface);
out:
return r;
}
static void usbtouch_close(struct input_dev *input)
{
struct usbtouch_usb *usbtouch = input_get_drvdata(input);
int r;
if (!usbtouch->type->irq_always)
usb_kill_urb(usbtouch->irq);
r = usb_autopm_get_interface(usbtouch->interface);
usbtouch->interface->needs_remote_wakeup = 0;
if (!r)
usb_autopm_put_interface(usbtouch->interface);
}
static int usbtouch_suspend
(struct usb_interface *intf, pm_message_t message)
{
struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
usb_kill_urb(usbtouch->irq);
return 0;
}
static int usbtouch_resume(struct usb_interface *intf)
{
struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
struct input_dev *input = usbtouch->input;
int result = 0;
mutex_lock(&input->mutex);
if (input->users || usbtouch->type->irq_always)
result = usb_submit_urb(usbtouch->irq, GFP_NOIO);
mutex_unlock(&input->mutex);
return result;
}
static int usbtouch_reset_resume(struct usb_interface *intf)
{
struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
struct input_dev *input = usbtouch->input;
int err = 0;
/* reinit the device */
if (usbtouch->type->init) {
err = usbtouch->type->init(usbtouch);
if (err) {
dev_dbg(&intf->dev,
"%s - type->init() failed, err: %d\n",
__func__, err);
return err;
}
}
/* restart IO if needed */
mutex_lock(&input->mutex);
if (input->users)
err = usb_submit_urb(usbtouch->irq, GFP_NOIO);
mutex_unlock(&input->mutex);
return err;
}
static void usbtouch_free_buffers(struct usb_device *udev,
struct usbtouch_usb *usbtouch)
{
usb_free_coherent(udev, usbtouch->type->rept_size,
usbtouch->data, usbtouch->data_dma);
kfree(usbtouch->buffer);
}
static struct usb_endpoint_descriptor *
usbtouch_get_input_endpoint(struct usb_host_interface *interface)
{
int i;
for (i = 0; i < interface->desc.bNumEndpoints; i++)
if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
return &interface->endpoint[i].desc;
return NULL;
}
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_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;
endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
if (!endpoint)
return -ENXIO;
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_alloc_coherent(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) {
dev_dbg(&intf->dev,
"%s - usb_alloc_urb failed: usbtouch->irq\n", __func__);
goto out_free_buffers;
}
usbtouch->interface = intf;
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);
if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT)
usb_fill_int_urb(usbtouch->irq, udev,
usb_rcvintpipe(udev, endpoint->bEndpointAddress),
usbtouch->data, type->rept_size,
usbtouch_irq, usbtouch, endpoint->bInterval);
else
usb_fill_bulk_urb(usbtouch->irq, udev,
usb_rcvbulkpipe(udev, endpoint->bEndpointAddress),
usbtouch->data, type->rept_size,
usbtouch_irq, usbtouch);
usbtouch->irq->dev = udev;
usbtouch->irq->transfer_dma = usbtouch->data_dma;
usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
/* device specific allocations */
if (type->alloc) {
err = type->alloc(usbtouch);
if (err) {
dev_dbg(&intf->dev,
"%s - type->alloc() failed, err: %d\n",
__func__, err);
goto out_free_urb;
}
}
/* device specific initialisation*/
if (type->init) {
err = type->init(usbtouch);
if (err) {
dev_dbg(&intf->dev,
"%s - type->init() failed, err: %d\n",
__func__, err);
goto out_do_exit;
}
}
err = input_register_device(usbtouch->input);
if (err) {
dev_dbg(&intf->dev,
"%s - input_register_device failed, err: %d\n",
__func__, err);
goto out_do_exit;
}
usb_set_intfdata(intf, usbtouch);
if (usbtouch->type->irq_always) {
/* this can't fail */
usb_autopm_get_interface(intf);
err = usb_submit_urb(usbtouch->irq, GFP_KERNEL);
if (err) {
usb_autopm_put_interface(intf);
dev_err(&intf->dev,
"%s - usb_submit_urb failed with result: %d\n",
__func__, err);
goto out_unregister_input;
}
}
return 0;
out_unregister_input:
input_unregister_device(input_dev);
input_dev = NULL;
out_do_exit:
if (type->exit)
type->exit(usbtouch);
out_free_urb:
usb_free_urb(usbtouch->irq);
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);
if (!usbtouch)
return;
dev_dbg(&intf->dev,
"%s - usbtouch is initialized, cleaning up\n", __func__);
usb_set_intfdata(intf, NULL);
/* this will stop IO via close */
input_unregister_device(usbtouch->input);
usb_free_urb(usbtouch->irq);
if (usbtouch->type->exit)
usbtouch->type->exit(usbtouch);
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,
.suspend = usbtouch_suspend,
.resume = usbtouch_resume,
.reset_resume = usbtouch_reset_resume,
.id_table = usbtouch_devices,
.supports_autosuspend = 1,
};
module_usb_driver(usbtouch_driver);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_ALIAS("touchkitusb");
MODULE_ALIAS("itmtouch");
MODULE_ALIAS("mtouchusb");
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