usb4-配置usb触摸屏
淘了一个触摸屏,usb接口,四线电阻,usb芯片是cy7c63723c。
此芯片一端接触摸屏的四根线,对触摸动作采样然后ad转换,一端通过usb接mini2440,即将ad转换后的数据通过usb接口发给mini2440.
linux2.6.32已经集成usb 触摸屏驱动,mini2440默认是不配置的。可以配置一下
make menuconfig 之后选择
Device Drivers ---> Input device support ---> [*] Touchscreens ---> <*> USB Touchscreen Driver
即如图
![](http://hi.csdn.net/attachment/201110/31/0_1320032582KeRe.gif)
分析一下这一项的帮助信息,如下,可知其对应的编译符号是 TOUCHSCREEN_USB_COMPOSITE
此芯片一端接触摸屏的四根线,对触摸动作采样然后ad转换,一端通过usb接mini2440,即将ad转换后的数据通过usb接口发给mini2440.
linux2.6.32已经集成usb 触摸屏驱动,mini2440默认是不配置的。可以配置一下
make menuconfig 之后选择
Device Drivers ---> Input device support ---> [*] Touchscreens ---> <*> USB Touchscreen Driver
即如图
![](http://hi.csdn.net/attachment/201110/31/0_1320032582KeRe.gif)
分析一下这一项的帮助信息,如下,可知其对应的编译符号是 TOUCHSCREEN_USB_COMPOSITE
先说一下,depends on
从此项可知这个符号需要根据这些编译符号的配置来显示,!S390 [=S390] && INPUT [=y] && INPUT_TOUCHSCREEN [=y] && USB_ARCH_HAS_HCD [=y]
比如符号 INPUT_TOUCHSCREEN 要配置成y,而符号 INPUT_TOUCHSCREEN 就是 Touchscreens 这一项,如下
看他的帮助信息,这一项Touchscreens 就是代表符号INPUT_TOUCHSCREEN
其余类似
再看一下,Defined at drivers/input/touchscreen/Kconfig:415 这句话有何用
他可以帮助我们找到此项的源代码,如下,可以知道本项对应的源代码是usbtouchscreen.c
直接从该项help里的最上面的提示也可以找到,即CONFIG_TOUCHSCREEN_USB_COMPOSITE,然后去Makefile查找这个东东即可。
//Kconfig中符号TOUCHSCREEN_USB_COMPOSITE具体信息 config TOUCHSCREEN_USB_COMPOSITE tristate "USB Touchscreen Driver" depends on USB_ARCH_HAS_HCD//只有这个符号有选,符号TOUCHSCREEN_USB_COMPOSITE才会出现在menu中,跟上面第2个图显示的deponds on外形有些不同,但一样的 select USB help USB Touchscreen driver for: - eGalax Touchkit USB (also includes eTurboTouch CT-410/510/700) - PanJit TouchSet USB - 3M MicroTouch USB (EX II series) - ITM - some other eTurboTouch - Gunze AHL61 - DMC TSC-10/25 - IRTOUCHSYSTEMS/UNITOP - IdealTEK URTC1000 - GoTop Super_Q2/GogoPen/PenPower tablets - JASTEC USB Touch Controller/DigiTech DTR-02U Have a look at <http://linux.chapter7.ch/touchkit/> for a usage description and the required user-space stuff. To compile this driver as a module, choose M here: the module will be called usbtouchscreen.
/****************************************************************************** * 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 * * 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."); static int 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; 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, DEVTYPE_JASTEC, DEVTYPE_E2I, }; #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 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 #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 {} }; /***************************************************************************** * e2i Part */ #ifdef CONFIG_TOUCHSCREEN_USB_E2I static int e2i_init(struct usbtouch_usb *usbtouch) { int ret; ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0), 0x01, 0x02, 0x0000, 0x0081, NULL, 0, USB_CTRL_SET_TIMEOUT); dbg("%s - usb_control_msg - E2I_RESET - bytes|err: %d", __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 /***************************************************************************** * 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; 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; } /* 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 = 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 /***************************************************************************** * 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 /***************************************************************************** * 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 #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 }; /***************************************************************************** * 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");