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  1. /******************************************************************************
  2.  * usbtouchscreen.c
  3.  * Driver for USB Touchscreens, supporting those devices:
  4.  *  - eGalax Touchkit
  5.  *    includes eTurboTouch CT-410/510/700
  6.  *  - 3M/Microtouch  EX II series
  7.  *  - ITM
  8.  *  - PanJit TouchSet
  9.  *  - eTurboTouch
  10.  *  - Gunze AHL61
  11.  *  - DMC TSC-10/25
  12.  *  - IRTOUCHSYSTEMS/UNITOP
  13.  *  - IdealTEK URTC1000
  14.  *  - General Touch
  15.  *  - GoTop Super_Q2/GogoPen/PenPower tablets
  16.  *
  17.  * Copyright (C) 2004-2007 by Daniel Ritz <[email protected]>
  18.  * Copyright (C) by Todd E. Johnson (mtouchusb.c)
  19.  *
  20.  * This program is free software; you can redistribute it and/or
  21.  * modify it under the terms of the GNU General Public License as
  22.  * published by the Free Software Foundation; either version 2 of the
  23.  * License, or (at your option) any later version.
  24.  *
  25.  * This program is distributed in the hope that it will be useful, but
  26.  * WITHOUT ANY WARRANTY; without even the implied warranty of
  27.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  28.  * General Public License for more details.
  29.  *
  30.  * You should have received a copy of the GNU General Public License
  31.  * along with this program; if not, write to the Free Software
  32.  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  33.  *
  34.  * Driver is based on touchkitusb.c
  35.  * - ITM parts are from itmtouch.c
  36.  * - 3M parts are from mtouchusb.c
  37.  * - PanJit parts are from an unmerged driver by Lanslott Gish
  38.  * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
  39.  *   driver from Marius Vollmer
  40.  *
  41.  *****************************************************************************/
  42.  
  43. //#define DEBUG
  44.  
  45. #include <linux/kernel.h>
  46. #include <linux/slab.h>
  47. #include <linux/input.h>
  48. #include <linux/module.h>
  49. #include <linux/init.h>
  50. #include <linux/usb.h>
  51. #include <linux/usb/input.h>
  52. #include <linux/hid.h>
  53.  
  54.  
  55. #define DRIVER_VERSION      "v0.6"
  56. #define DRIVER_AUTHOR       "Daniel Ritz <[email protected]>"
  57. #define DRIVER_DESC     "USB Touchscreen Driver"
  58.  
  59. static int swap_xy;
  60. module_param(swap_xy, bool, 0644);
  61. MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
  62.  
  63. /* device specifc data/functions */
  64. struct usbtouch_usb;
  65. struct usbtouch_device_info {
  66.     int min_xc, max_xc;
  67.     int min_yc, max_yc;
  68.     int min_press, max_press;
  69.     int rept_size;
  70.  
  71.     void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
  72.  
  73.     /*
  74.      * used to get the packet len. possible return values:
  75.      * > 0: packet len
  76.      * = 0: skip one byte
  77.      * < 0: -return value more bytes needed
  78.      */
  79.     int  (*get_pkt_len) (unsigned char *pkt, int len);
  80.  
  81.     int  (*read_data)   (struct usbtouch_usb *usbtouch, unsigned char *pkt);
  82.     int  (*init)        (struct usbtouch_usb *usbtouch);
  83. };
  84.  
  85. /* a usbtouch device */
  86. struct usbtouch_usb {
  87.     unsigned char *data;
  88.     dma_addr_t data_dma;
  89.     unsigned char *buffer;
  90.     int buf_len;
  91.     struct urb *irq;
  92.     struct usb_device *udev;
  93.     struct input_dev *input;
  94.     struct usbtouch_device_info *type;
  95.     char name[128];
  96.     char phys[64];
  97.  
  98.     int x, y;
  99.     int touch, press;
  100. };
  101.  
  102.  
  103. /* device types */
  104. enum {
  105.     DEVTYPE_IGNORE = -1,
  106.     DEVTYPE_EGALAX,
  107.     DEVTYPE_PANJIT,
  108.     DEVTYPE_3M,
  109.     DEVTYPE_ITM,
  110.     DEVTYPE_ETURBO,
  111.     DEVTYPE_GUNZE,
  112.     DEVTYPE_DMC_TSC10,
  113.     DEVTYPE_IRTOUCH,
  114.     DEVTYPE_IDEALTEK,
  115.     DEVTYPE_GENERAL_TOUCH,
  116.     DEVTYPE_GOTOP,
  117. };
  118.  
  119. #define USB_DEVICE_HID_CLASS(vend, prod) \
  120.     .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \
  121.         | USB_DEVICE_ID_MATCH_DEVICE, \
  122.     .idVendor = (vend), \
  123.     .idProduct = (prod), \
  124.     .bInterfaceClass = USB_INTERFACE_CLASS_HID, \
  125.     .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE
  126.  
  127. static struct usb_device_id usbtouch_devices[] = {
  128. #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
  129.     /* ignore the HID capable devices, handled by usbhid */
  130.     {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE},
  131.     {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE},
  132.  
  133.     /* normal device IDs */
  134.     {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
  135.     {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
  136.     {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
  137.     {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
  138.     {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
  139.     {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
  140.     {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
  141. #endif
  142.  
  143. #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
  144.     {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
  145.     {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
  146.     {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
  147.     {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
  148. #endif
  149.  
  150. #ifdef CONFIG_TOUCHSCREEN_USB_3M
  151.     {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
  152. #endif
  153.  
  154. #ifdef CONFIG_TOUCHSCREEN_USB_ITM
  155.     {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
  156. #endif
  157.  
  158. #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
  159.     {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
  160. #endif
  161.  
  162. #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
  163.     {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
  164. #endif
  165.  
  166. #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
  167.     {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
  168. #endif
  169.  
  170. #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
  171.     {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
  172.     {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
  173. #endif
  174.  
  175. #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
  176.     {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
  177. #endif
  178.  
  179. #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
  180.     {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
  181. #endif
  182.  
  183. #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
  184.     {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
  185.     {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
  186.     {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
  187. #endif
  188.  
  189.     {}
  190. };
  191.  
  192.  
  193. /*****************************************************************************
  194.  * eGalax part
  195.  */
  196.  
  197. #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
  198.  
  199. #ifndef MULTI_PACKET
  200. #define MULTI_PACKET
  201. #endif
  202.  
  203. #define EGALAX_PKT_TYPE_MASK        0xFE
  204. #define EGALAX_PKT_TYPE_REPT        0x80
  205. #define EGALAX_PKT_TYPE_DIAG        0x0A
  206.  
  207. static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
  208. {
  209.     if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
  210.         return 0;
  211.  
  212.     dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
  213.     dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
  214.     dev->touch = pkt[0] & 0x01;
  215.  
  216.     return 1;
  217. }
  218.  
  219. static int egalax_get_pkt_len(unsigned char *buf, int len)
  220. {
  221.     switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
  222.     case EGALAX_PKT_TYPE_REPT:
  223.         return 5;
  224.  
  225.     case EGALAX_PKT_TYPE_DIAG:
  226.         if (len < 2)
  227.             return -1;
  228.  
  229.         return buf[1] + 2;
  230.     }
  231.  
  232.     return 0;
  233. }
  234. #endif
  235.  
  236.  
  237. /*****************************************************************************
  238.  * PanJit Part
  239.  */
  240. #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
  241. static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
  242. {
  243.     dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
  244.     dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
  245.     dev->touch = pkt[0] & 0x01;
  246.  
  247.     return 1;
  248. }
  249. #endif
  250.  
  251.  
  252. /*****************************************************************************
  253.  * 3M/Microtouch Part
  254.  */
  255. #ifdef CONFIG_TOUCHSCREEN_USB_3M
  256.  
  257. #define MTOUCHUSB_ASYNC_REPORT          1
  258. #define MTOUCHUSB_RESET                 7
  259. #define MTOUCHUSB_REQ_CTRLLR_ID         10
  260.  
  261. static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
  262. {
  263.     dev->x = (pkt[8] << 8) | pkt[7];
  264.     dev->y = (pkt[10] << 8) | pkt[9];
  265.     dev->touch = (pkt[2] & 0x40) ? 1 : 0;
  266.  
  267.     return 1;
  268. }
  269.  
  270. static int mtouch_init(struct usbtouch_usb *usbtouch)
  271. {
  272.     int ret, i;
  273.  
  274.     ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
  275.                           MTOUCHUSB_RESET,
  276.                           USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  277.                           1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
  278.     dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
  279.         __func__, ret);
  280.     if (ret < 0)
  281.         return ret;
  282.     msleep(150);
  283.  
  284.     for (i = 0; i < 3; i++) {
  285.         ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
  286.                       MTOUCHUSB_ASYNC_REPORT,
  287.                       USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  288.                       1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
  289.         dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
  290.             __func__, ret);
  291.         if (ret >= 0)
  292.             break;
  293.         if (ret != -EPIPE)
  294.             return ret;
  295.     }
  296.  
  297.     return 0;
  298. }
  299. #endif
  300.  
  301.  
  302. /*****************************************************************************
  303.  * ITM Part
  304.  */
  305. #ifdef CONFIG_TOUCHSCREEN_USB_ITM
  306. static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
  307. {
  308.     int touch;
  309.     /*
  310.      * ITM devices report invalid x/y data if not touched.
  311.      * if the screen was touched before but is not touched any more
  312.      * report touch as 0 with the last valid x/y data once. then stop
  313.      * reporting data until touched again.
  314.      */
  315.     dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
  316.  
  317.     touch = ~pkt[7] & 0x20;
  318.     if (!touch) {
  319.         if (dev->touch) {
  320.             dev->touch = 0;
  321.             return 1;
  322.         }
  323.  
  324.         return 0;
  325.     }
  326.  
  327.     dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
  328.     dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
  329.     dev->touch = touch;
  330.  
  331.     return 1;
  332. }
  333. #endif
  334.  
  335.  
  336. /*****************************************************************************
  337.  * eTurboTouch part
  338.  */
  339. #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
  340. #ifndef MULTI_PACKET
  341. #define MULTI_PACKET
  342. #endif
  343. static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
  344. {
  345.     unsigned int shift;
  346.  
  347.     /* packets should start with sync */
  348.     if (!(pkt[0] & 0x80))
  349.         return 0;
  350.  
  351.     shift = (6 - (pkt[0] & 0x03));
  352.     dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
  353.     dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
  354.     dev->touch = (pkt[0] & 0x10) ? 1 : 0;
  355.  
  356.     return 1;
  357. }
  358.  
  359. static int eturbo_get_pkt_len(unsigned char *buf, int len)
  360. {
  361.     if (buf[0] & 0x80)
  362.         return 5;
  363.     if (buf[0] == 0x01)
  364.         return 3;
  365.     return 0;
  366. }
  367. #endif
  368.  
  369.  
  370. /*****************************************************************************
  371.  * Gunze part
  372.  */
  373. #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
  374. static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
  375. {
  376.     if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
  377.         return 0;
  378.  
  379.     dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
  380.     dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
  381.     dev->touch = pkt[0] & 0x20;
  382.  
  383.     return 1;
  384. }
  385. #endif
  386.  
  387. /*****************************************************************************
  388.  * DMC TSC-10/25 Part
  389.  *
  390.  * Documentation about the controller and it's protocol can be found at
  391.  *   http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
  392.  *   http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
  393.  */
  394. #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
  395.  
  396. /* supported data rates. currently using 130 */
  397. #define TSC10_RATE_POINT    0x50
  398. #define TSC10_RATE_30       0x40
  399. #define TSC10_RATE_50       0x41
  400. #define TSC10_RATE_80       0x42
  401. #define TSC10_RATE_100      0x43
  402. #define TSC10_RATE_130      0x44
  403. #define TSC10_RATE_150      0x45
  404.  
  405. /* commands */
  406. #define TSC10_CMD_RESET     0x55
  407. #define TSC10_CMD_RATE      0x05
  408. #define TSC10_CMD_DATA1     0x01
  409.  
  410. static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
  411. {
  412.     struct usb_device *dev = usbtouch->udev;
  413.     int ret = -ENOMEM;
  414.     unsigned char *buf;
  415.  
  416.     buf = kmalloc(2, GFP_KERNEL);
  417.     if (!buf)
  418.         goto err_nobuf;
  419.     /* reset */
  420.     buf[0] = buf[1] = 0xFF;
  421.     ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
  422.                           TSC10_CMD_RESET,
  423.                           USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  424.                           0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
  425.     if (ret < 0)
  426.         goto err_out;
  427.     if (buf[0] != 0x06) {
  428.         ret = -ENODEV;
  429.         goto err_out;
  430.     }
  431.  
  432.     /* set coordinate output rate */
  433.     buf[0] = buf[1] = 0xFF;
  434.     ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
  435.                           TSC10_CMD_RATE,
  436.                           USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  437.                           TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
  438.     if (ret < 0)
  439.         goto err_out;
  440.     if ((buf[0] != 0x06) && (buf[0] != 0x15 || buf[1] != 0x01)) {
  441.         ret = -ENODEV;
  442.         goto err_out;
  443.     }
  444.  
  445.     /* start sending data */
  446.     ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
  447.                           TSC10_CMD_DATA1,
  448.                           USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  449.                           0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
  450. err_out:
  451.     kfree(buf);
  452. err_nobuf:
  453.     return ret;
  454. }
  455.  
  456.  
  457. static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
  458. {
  459.     dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
  460.     dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
  461.     dev->touch = pkt[0] & 0x01;
  462.  
  463.     return 1;
  464. }
  465. #endif
  466.  
  467.  
  468. /*****************************************************************************
  469.  * IRTOUCH Part
  470.  */
  471. #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
  472. static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
  473. {
  474.     dev->x = (pkt[3] << 8) | pkt[2];
  475.     dev->y = (pkt[5] << 8) | pkt[4];
  476.     dev->touch = (pkt[1] & 0x03) ? 1 : 0;
  477.  
  478.     return 1;
  479. }
  480. #endif
  481.  
  482.  
  483. /*****************************************************************************
  484.  * IdealTEK URTC1000 Part
  485.  */
  486. #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
  487. #ifndef MULTI_PACKET
  488. #define MULTI_PACKET
  489. #endif
  490. static int idealtek_get_pkt_len(unsigned char *buf, int len)
  491. {
  492.     if (buf[0] & 0x80)
  493.         return 5;
  494.     if (buf[0] == 0x01)
  495.         return len;
  496.     return 0;
  497. }
  498.  
  499. static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
  500. {
  501.     switch (pkt[0] & 0x98) {
  502.     case 0x88:
  503.         /* touch data in IdealTEK mode */
  504.         dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
  505.         dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
  506.         dev->touch = (pkt[0] & 0x40) ? 1 : 0;
  507.         return 1;
  508.  
  509.     case 0x98:
  510.         /* touch data in MT emulation mode */
  511.         dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
  512.         dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
  513.         dev->touch = (pkt[0] & 0x40) ? 1 : 0;
  514.         return 1;
  515.  
  516.     default:
  517.         return 0;
  518.     }
  519. }
  520. #endif
  521.  
  522. /*****************************************************************************
  523.  * General Touch Part
  524.  */
  525. #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
  526. static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
  527. {
  528.     dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1] ;
  529.     dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3] ;
  530.     dev->press = pkt[5] & 0xff;
  531.     dev->touch = pkt[0] & 0x01;
  532.  
  533.     return 1;
  534. }
  535. #endif
  536.  
  537. /*****************************************************************************
  538.  * GoTop Part
  539.  */
  540. #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
  541. static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
  542. {
  543.     dev->x = ((pkt[1] & 0x38) << 4) | pkt[2];
  544.     dev->y = ((pkt[1] & 0x07) << 7) | pkt[3];
  545.     dev->touch = pkt[0] & 0x01;
  546.     return 1;
  547. }
  548. #endif
  549.  
  550.  
  551. /*****************************************************************************
  552.  * the different device descriptors
  553.  */
  554. #ifdef MULTI_PACKET
  555. static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
  556.                    unsigned char *pkt, int len);
  557. #endif
  558.  
  559. static struct usbtouch_device_info usbtouch_dev_info[] = {
  560. #ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
  561.     [DEVTYPE_EGALAX] = {
  562.         .min_xc     = 0x0,
  563.         .max_xc     = 0x07ff,
  564.         .min_yc     = 0x0,
  565.         .max_yc     = 0x07ff,
  566.         .rept_size  = 16,
  567.         .process_pkt    = usbtouch_process_multi,
  568.         .get_pkt_len    = egalax_get_pkt_len,
  569.         .read_data  = egalax_read_data,
  570.     },
  571. #endif
  572.  
  573. #ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
  574.     [DEVTYPE_PANJIT] = {
  575.         .min_xc     = 0x0,
  576.         .max_xc     = 0x0fff,
  577.         .min_yc     = 0x0,
  578.         .max_yc     = 0x0fff,
  579.         .rept_size  = 8,
  580.         .read_data  = panjit_read_data,
  581.     },
  582. #endif
  583.  
  584. #ifdef CONFIG_TOUCHSCREEN_USB_3M
  585.     [DEVTYPE_3M] = {
  586.         .min_xc     = 0x0,
  587.         .max_xc     = 0x4000,
  588.         .min_yc     = 0x0,
  589.         .max_yc     = 0x4000,
  590.         .rept_size  = 11,
  591.         .read_data  = mtouch_read_data,
  592.         .init       = mtouch_init,
  593.     },
  594. #endif
  595.  
  596. #ifdef CONFIG_TOUCHSCREEN_USB_ITM
  597.     [DEVTYPE_ITM] = {
  598.         .min_xc     = 0x0,
  599.         .max_xc     = 0x0fff,
  600.         .min_yc     = 0x0,
  601.         .max_yc     = 0x0fff,
  602.         .max_press  = 0xff,
  603.         .rept_size  = 8,
  604.         .read_data  = itm_read_data,
  605.     },
  606. #endif
  607.  
  608. #ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
  609.     [DEVTYPE_ETURBO] = {
  610.         .min_xc     = 0x0,
  611.         .max_xc     = 0x07ff,
  612.         .min_yc     = 0x0,
  613.         .max_yc     = 0x07ff,
  614.         .rept_size  = 8,
  615.         .process_pkt    = usbtouch_process_multi,
  616.         .get_pkt_len    = eturbo_get_pkt_len,
  617.         .read_data  = eturbo_read_data,
  618.     },
  619. #endif
  620.  
  621. #ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
  622.     [DEVTYPE_GUNZE] = {
  623.         .min_xc     = 0x0,
  624.         .max_xc     = 0x0fff,
  625.         .min_yc     = 0x0,
  626.         .max_yc     = 0x0fff,
  627.         .rept_size  = 4,
  628.         .read_data  = gunze_read_data,
  629.     },
  630. #endif
  631.  
  632. #ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
  633.     [DEVTYPE_DMC_TSC10] = {
  634.         .min_xc     = 0x0,
  635.         .max_xc     = 0x03ff,
  636.         .min_yc     = 0x0,
  637.         .max_yc     = 0x03ff,
  638.         .rept_size  = 5,
  639.         .init       = dmc_tsc10_init,
  640.         .read_data  = dmc_tsc10_read_data,
  641.     },
  642. #endif
  643.  
  644. #ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
  645.     [DEVTYPE_IRTOUCH] = {
  646.         .min_xc     = 0x0,
  647.         .max_xc     = 0x0fff,
  648.         .min_yc     = 0x0,
  649.         .max_yc     = 0x0fff,
  650.         .rept_size  = 8,
  651.         .read_data  = irtouch_read_data,
  652.     },
  653. #endif
  654.  
  655. #ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
  656.     [DEVTYPE_IDEALTEK] = {
  657.         .min_xc     = 0x0,
  658.         .max_xc     = 0x0fff,
  659.         .min_yc     = 0x0,
  660.         .max_yc     = 0x0fff,
  661.         .rept_size  = 8,
  662.         .process_pkt    = usbtouch_process_multi,
  663.         .get_pkt_len    = idealtek_get_pkt_len,
  664.         .read_data  = idealtek_read_data,
  665.     },
  666. #endif
  667.  
  668. #ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
  669.     [DEVTYPE_GENERAL_TOUCH] = {
  670.         .min_xc     = 0x0,
  671.         .max_xc     = 0x0500,
  672.         .min_yc     = 0x0,
  673.         .max_yc     = 0x0500,
  674.         .rept_size  = 7,
  675.         .read_data  = general_touch_read_data,
  676.     },
  677. #endif
  678.  
  679. #ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
  680.     [DEVTYPE_GOTOP] = {
  681.         .min_xc     = 0x0,
  682.         .max_xc     = 0x03ff,
  683.         .min_yc     = 0x0,
  684.         .max_yc     = 0x03ff,
  685.         .rept_size  = 4,
  686.         .read_data  = gotop_read_data,
  687.     },
  688. #endif
  689. };
  690.  
  691.  
  692. /*****************************************************************************
  693.  * Generic Part
  694.  */
  695. static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
  696.                                  unsigned char *pkt, int len)
  697. {
  698.     struct usbtouch_device_info *type = usbtouch->type;
  699.  
  700.     if (!type->read_data(usbtouch, pkt))
  701.             return;
  702.  
  703.     input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch);
  704.  
  705.     if (swap_xy) {
  706.         input_report_abs(usbtouch->input, ABS_X, usbtouch->y);
  707.         input_report_abs(usbtouch->input, ABS_Y, usbtouch->x);
  708.     } else {
  709.         input_report_abs(usbtouch->input, ABS_X, usbtouch->x);
  710.         input_report_abs(usbtouch->input, ABS_Y, usbtouch->y);
  711.     }
  712.     if (type->max_press)
  713.         input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press);
  714.     input_sync(usbtouch->input);
  715. }
  716.  
  717.  
  718. #ifdef MULTI_PACKET
  719. static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
  720.                                    unsigned char *pkt, int len)
  721. {
  722.     unsigned char *buffer;
  723.     int pkt_len, pos, buf_len, tmp;
  724.  
  725.     /* process buffer */
  726.     if (unlikely(usbtouch->buf_len)) {
  727.         /* try to get size */
  728.         pkt_len = usbtouch->type->get_pkt_len(
  729.                 usbtouch->buffer, usbtouch->buf_len);
  730.  
  731.         /* drop? */
  732.         if (unlikely(!pkt_len))
  733.             goto out_flush_buf;
  734.  
  735.         /* need to append -pkt_len bytes before able to get size */
  736.         if (unlikely(pkt_len < 0)) {
  737.             int append = -pkt_len;
  738.             if (unlikely(append > len))
  739.                    append = len;
  740.             if (usbtouch->buf_len + append >= usbtouch->type->rept_size)
  741.                 goto out_flush_buf;
  742.             memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append);
  743.             usbtouch->buf_len += append;
  744.  
  745.             pkt_len = usbtouch->type->get_pkt_len(
  746.                     usbtouch->buffer, usbtouch->buf_len);
  747.             if (pkt_len < 0)
  748.                 return;
  749.         }
  750.  
  751.         /* append */
  752.         tmp = pkt_len - usbtouch->buf_len;
  753.         if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size)
  754.             goto out_flush_buf;
  755.         memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
  756.         usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len);
  757.  
  758.         buffer = pkt + tmp;
  759.         buf_len = len - tmp;
  760.     } else {
  761.         buffer = pkt;
  762.         buf_len = len;
  763.     }
  764.  
  765.     /* loop over the received packet, process */
  766.     pos = 0;
  767.     while (pos < buf_len) {
  768.         /* get packet len */
  769.         pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
  770.                             buf_len - pos);
  771.  
  772.         /* unknown packet: skip one byte */
  773.         if (unlikely(!pkt_len)) {
  774.             pos++;
  775.             continue;
  776.         }
  777.  
  778.         /* full packet: process */
  779.         if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
  780.             usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len);
  781.         } else {
  782.             /* incomplete packet: save in buffer */
  783.             memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
  784.             usbtouch->buf_len = buf_len - pos;
  785.             return;
  786.         }
  787.         pos += pkt_len;
  788.     }
  789.  
  790. out_flush_buf:
  791.     usbtouch->buf_len = 0;
  792.     return;
  793. }
  794. #endif
  795.  
  796.  
  797. static void usbtouch_irq(struct urb *urb)
  798. {
  799.     struct usbtouch_usb *usbtouch = urb->context;
  800.     int retval;
  801.  
  802.     switch (urb->status) {
  803.     case 0:
  804.         /* success */
  805.         break;
  806.     case -ETIME:
  807.         /* this urb is timing out */
  808.         dbg("%s - urb timed out - was the device unplugged?",
  809.             __func__);
  810.         return;
  811.     case -ECONNRESET:
  812.     case -ENOENT:
  813.     case -ESHUTDOWN:
  814.         /* this urb is terminated, clean up */
  815.         dbg("%s - urb shutting down with status: %d",
  816.             __func__, urb->status);
  817.         return;
  818.     default:
  819.         dbg("%s - nonzero urb status received: %d",
  820.             __func__, urb->status);
  821.         goto exit;
  822.     }
  823.  
  824.     usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length);
  825.  
  826. exit:
  827.     retval = usb_submit_urb(urb, GFP_ATOMIC);
  828.     if (retval)
  829.         err("%s - usb_submit_urb failed with result: %d",
  830.             __func__, retval);
  831. }
  832.  
  833. static int usbtouch_open(struct input_dev *input)
  834. {
  835.     struct usbtouch_usb *usbtouch = input_get_drvdata(input);
  836.  
  837.     usbtouch->irq->dev = usbtouch->udev;
  838.  
  839.     if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
  840.         return -EIO;
  841.  
  842.     return 0;
  843. }
  844.  
  845. static void usbtouch_close(struct input_dev *input)
  846. {
  847.     struct usbtouch_usb *usbtouch = input_get_drvdata(input);
  848.  
  849.     usb_kill_urb(usbtouch->irq);
  850. }
  851.  
  852.  
  853. static void usbtouch_free_buffers(struct usb_device *udev,
  854.                   struct usbtouch_usb *usbtouch)
  855. {
  856.     usb_buffer_free(udev, usbtouch->type->rept_size,
  857.                     usbtouch->data, usbtouch->data_dma);
  858.     kfree(usbtouch->buffer);
  859. }
  860.  
  861.  
  862. static int usbtouch_probe(struct usb_interface *intf,
  863.               const struct usb_device_id *id)
  864. {
  865.     struct usbtouch_usb *usbtouch;
  866.     struct input_dev *input_dev;
  867.     struct usb_host_interface *interface;
  868.     struct usb_endpoint_descriptor *endpoint;
  869.     struct usb_device *udev = interface_to_usbdev(intf);
  870.     struct usbtouch_device_info *type;
  871.     int err = -ENOMEM;
  872.  
  873.     /* some devices are ignored */
  874.     if (id->driver_info == DEVTYPE_IGNORE)
  875.         return -ENODEV;
  876.  
  877.     interface = intf->cur_altsetting;
  878.     endpoint = &interface->endpoint[0].desc;
  879.  
  880.     usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
  881.     input_dev = input_allocate_device();
  882.     if (!usbtouch || !input_dev)
  883.         goto out_free;
  884.  
  885.     type = &usbtouch_dev_info[id->driver_info];
  886.     usbtouch->type = type;
  887.     if (!type->process_pkt)
  888.         type->process_pkt = usbtouch_process_pkt;
  889.  
  890.     usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
  891.                                       GFP_KERNEL, &usbtouch->data_dma);
  892.     if (!usbtouch->data)
  893.         goto out_free;
  894.  
  895.     if (type->get_pkt_len) {
  896.         usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
  897.         if (!usbtouch->buffer)
  898.             goto out_free_buffers;
  899.     }
  900.  
  901.     usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
  902.     if (!usbtouch->irq) {
  903.         dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__);
  904.         goto out_free_buffers;
  905.     }
  906.  
  907.     usbtouch->udev = udev;
  908.     usbtouch->input = input_dev;
  909.  
  910.     if (udev->manufacturer)
  911.         strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
  912.  
  913.     if (udev->product) {
  914.         if (udev->manufacturer)
  915.             strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
  916.         strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
  917.     }
  918.  
  919.     if (!strlen(usbtouch->name))
  920.         snprintf(usbtouch->name, sizeof(usbtouch->name),
  921.             "USB Touchscreen %04x:%04x",
  922.              le16_to_cpu(udev->descriptor.idVendor),
  923.              le16_to_cpu(udev->descriptor.idProduct));
  924.  
  925.     usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
  926.     strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys));
  927.  
  928.     input_dev->name = usbtouch->name;
  929.     input_dev->phys = usbtouch->phys;
  930.     usb_to_input_id(udev, &input_dev->id);
  931.     input_dev->dev.parent = &intf->dev;
  932.  
  933.     input_set_drvdata(input_dev, usbtouch);
  934.  
  935.     input_dev->open = usbtouch_open;
  936.     input_dev->close = usbtouch_close;
  937.  
  938.     input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
  939.     input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
  940.     input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
  941.     input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
  942.     if (type->max_press)
  943.         input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press,
  944.                              type->max_press, 0, 0);
  945.  
  946.     usb_fill_int_urb(usbtouch->irq, usbtouch->udev,
  947.              usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress),
  948.              usbtouch->data, type->rept_size,
  949.              usbtouch_irq, usbtouch, endpoint->bInterval);
  950.  
  951.     usbtouch->irq->dev = usbtouch->udev;
  952.     usbtouch->irq->transfer_dma = usbtouch->data_dma;
  953.     usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
  954.  
  955.     /* device specific init */
  956.     if (type->init) {
  957.         err = type->init(usbtouch);
  958.         if (err) {
  959.             dbg("%s - type->init() failed, err: %d", __func__, err);
  960.             goto out_free_buffers;
  961.         }
  962.     }
  963.  
  964.     err = input_register_device(usbtouch->input);
  965.     if (err) {
  966.         dbg("%s - input_register_device failed, err: %d", __func__, err);
  967.         goto out_free_buffers;
  968.     }
  969.  
  970.     usb_set_intfdata(intf, usbtouch);
  971.  
  972.     return 0;
  973.  
  974. out_free_buffers:
  975.     usbtouch_free_buffers(udev, usbtouch);
  976. out_free:
  977.     input_free_device(input_dev);
  978.     kfree(usbtouch);
  979.     return err;
  980. }
  981.  
  982. static void usbtouch_disconnect(struct usb_interface *intf)
  983. {
  984.     struct usbtouch_usb *usbtouch = usb_get_intfdata(intf);
  985.  
  986.     dbg("%s - called", __func__);
  987.  
  988.     if (!usbtouch)
  989.         return;
  990.  
  991.     dbg("%s - usbtouch is initialized, cleaning up", __func__);
  992.     usb_set_intfdata(intf, NULL);
  993.     usb_kill_urb(usbtouch->irq);
  994.     input_unregister_device(usbtouch->input);
  995.     usb_free_urb(usbtouch->irq);
  996.     usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch);
  997.     kfree(usbtouch);
  998. }
  999.  
  1000. MODULE_DEVICE_TABLE(usb, usbtouch_devices);
  1001.  
  1002. static struct usb_driver usbtouch_driver = {
  1003.     .name       = "usbtouchscreen",
  1004.     .probe      = usbtouch_probe,
  1005.     .disconnect = usbtouch_disconnect,
  1006.     .id_table   = usbtouch_devices,
  1007. };
  1008.  
  1009. static int __init usbtouch_init(void)
  1010. {
  1011.     return usb_register(&usbtouch_driver);
  1012. }
  1013.  
  1014. static void __exit usbtouch_cleanup(void)
  1015. {
  1016.     usb_deregister(&usbtouch_driver);
  1017. }
  1018.  
  1019. module_init(usbtouch_init);
  1020. module_exit(usbtouch_cleanup);
  1021.  
  1022. MODULE_AUTHOR(DRIVER_AUTHOR);
  1023. MODULE_DESCRIPTION(DRIVER_DESC);
  1024. MODULE_LICENSE("GPL");
  1025.  
  1026. MODULE_ALIAS("touchkitusb");
  1027. MODULE_ALIAS("itmtouch");
  1028. MODULE_ALIAS("mtouchusb");
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