diff options
Diffstat (limited to 'drivers/input/touchscreen/usbtouchscreen.c')
| -rw-r--r-- | drivers/input/touchscreen/usbtouchscreen.c | 1029 |
1 files changed, 1029 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c new file mode 100644 index 0000000..fdd645c --- /dev/null +++ b/drivers/input/touchscreen/usbtouchscreen.c @@ -0,0 +1,1029 @@ +/****************************************************************************** + * usbtouchscreen.c + * Driver for USB Touchscreens, supporting those devices: + * - eGalax Touchkit + * includes eTurboTouch CT-410/510/700 + * - 3M/Microtouch EX II series + * - ITM + * - PanJit TouchSet + * - eTurboTouch + * - Gunze AHL61 + * - DMC TSC-10/25 + * - IRTOUCHSYSTEMS/UNITOP + * - IdealTEK URTC1000 + * - General Touch + * - GoTop Super_Q2/GogoPen/PenPower tablets + * + * Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch> + * Copyright (C) by Todd E. Johnson (mtouchusb.c) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Driver is based on touchkitusb.c + * - ITM parts are from itmtouch.c + * - 3M parts are from mtouchusb.c + * - PanJit parts are from an unmerged driver by Lanslott Gish + * - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged + * driver from Marius Vollmer + * + *****************************************************************************/ + +//#define DEBUG + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/input.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/usb.h> +#include <linux/usb/input.h> +#include <linux/hid.h> + + +#define DRIVER_VERSION "v0.6" +#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>" +#define DRIVER_DESC "USB Touchscreen Driver" + +static int swap_xy; +module_param(swap_xy, bool, 0644); +MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped."); + +/* device specifc data/functions */ +struct usbtouch_usb; +struct usbtouch_device_info { + int min_xc, max_xc; + int min_yc, max_yc; + int min_press, max_press; + int rept_size; + + void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len); + + /* + * used to get the packet len. possible return values: + * > 0: packet len + * = 0: skip one byte + * < 0: -return value more bytes needed + */ + int (*get_pkt_len) (unsigned char *pkt, int len); + + int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt); + int (*init) (struct usbtouch_usb *usbtouch); +}; + +/* a usbtouch device */ +struct usbtouch_usb { + unsigned char *data; + dma_addr_t data_dma; + unsigned char *buffer; + int buf_len; + struct urb *irq; + struct usb_device *udev; + struct input_dev *input; + struct usbtouch_device_info *type; + char name[128]; + char phys[64]; + + int x, y; + int touch, press; +}; + + +/* device types */ +enum { + DEVTYPE_IGNORE = -1, + DEVTYPE_EGALAX, + DEVTYPE_PANJIT, + DEVTYPE_3M, + DEVTYPE_ITM, + DEVTYPE_ETURBO, + DEVTYPE_GUNZE, + DEVTYPE_DMC_TSC10, + DEVTYPE_IRTOUCH, + DEVTYPE_IDEALTEK, + DEVTYPE_GENERAL_TOUCH, + DEVTYPE_GOTOP, +}; + +#define USB_DEVICE_HID_CLASS(vend, prod) \ + .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS \ + | USB_DEVICE_ID_MATCH_DEVICE, \ + .idVendor = (vend), \ + .idProduct = (prod), \ + .bInterfaceClass = USB_INTERFACE_CLASS_HID, \ + .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE + +static struct usb_device_id usbtouch_devices[] = { +#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX + /* ignore the HID capable devices, handled by usbhid */ + {USB_DEVICE_HID_CLASS(0x0eef, 0x0001), .driver_info = DEVTYPE_IGNORE}, + {USB_DEVICE_HID_CLASS(0x0eef, 0x0002), .driver_info = DEVTYPE_IGNORE}, + + /* normal device IDs */ + {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX}, + {USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX}, + {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX}, + {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX}, + {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX}, + {USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX}, + {USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX}, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT + {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT}, + {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT}, + {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT}, + {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT}, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_3M + {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M}, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_ITM + {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM}, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO + {USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO}, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE + {USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE}, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 + {USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10}, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH + {USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, + {USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH}, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK + {USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK}, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH + {USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH}, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP + {USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP}, + {USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP}, + {USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP}, +#endif + + {} +}; + + +/***************************************************************************** + * eGalax part + */ + +#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX + +#ifndef MULTI_PACKET +#define MULTI_PACKET +#endif + +#define EGALAX_PKT_TYPE_MASK 0xFE +#define EGALAX_PKT_TYPE_REPT 0x80 +#define EGALAX_PKT_TYPE_DIAG 0x0A + +static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +{ + if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT) + return 0; + + dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F); + dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F); + dev->touch = pkt[0] & 0x01; + + return 1; +} + +static int egalax_get_pkt_len(unsigned char *buf, int len) +{ + switch (buf[0] & EGALAX_PKT_TYPE_MASK) { + case EGALAX_PKT_TYPE_REPT: + return 5; + + case EGALAX_PKT_TYPE_DIAG: + if (len < 2) + return -1; + + return buf[1] + 2; + } + + return 0; +} +#endif + + +/***************************************************************************** + * PanJit Part + */ +#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT +static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +{ + dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1]; + dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3]; + dev->touch = pkt[0] & 0x01; + + return 1; +} +#endif + + +/***************************************************************************** + * 3M/Microtouch Part + */ +#ifdef CONFIG_TOUCHSCREEN_USB_3M + +#define MTOUCHUSB_ASYNC_REPORT 1 +#define MTOUCHUSB_RESET 7 +#define MTOUCHUSB_REQ_CTRLLR_ID 10 + +static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +{ + dev->x = (pkt[8] << 8) | pkt[7]; + dev->y = (pkt[10] << 8) | pkt[9]; + dev->touch = (pkt[2] & 0x40) ? 1 : 0; + + return 1; +} + +static int mtouch_init(struct usbtouch_usb *usbtouch) +{ + int ret, i; + + ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0), + MTOUCHUSB_RESET, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); + dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d", + __func__, ret); + if (ret < 0) + return ret; + msleep(150); + + for (i = 0; i < 3; i++) { + ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0), + MTOUCHUSB_ASYNC_REPORT, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT); + dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d", + __func__, ret); + if (ret >= 0) + break; + if (ret != -EPIPE) + return ret; + } + + return 0; +} +#endif + + +/***************************************************************************** + * ITM Part + */ +#ifdef CONFIG_TOUCHSCREEN_USB_ITM +static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +{ + int touch; + /* + * ITM devices report invalid x/y data if not touched. + * if the screen was touched before but is not touched any more + * report touch as 0 with the last valid x/y data once. then stop + * reporting data until touched again. + */ + dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F); + + touch = ~pkt[7] & 0x20; + if (!touch) { + if (dev->touch) { + dev->touch = 0; + return 1; + } + + return 0; + } + + dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F); + dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F); + dev->touch = touch; + + return 1; +} +#endif + + +/***************************************************************************** + * eTurboTouch part + */ +#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO +#ifndef MULTI_PACKET +#define MULTI_PACKET +#endif +static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +{ + unsigned int shift; + + /* packets should start with sync */ + if (!(pkt[0] & 0x80)) + return 0; + + shift = (6 - (pkt[0] & 0x03)); + dev->x = ((pkt[3] << 7) | pkt[4]) >> shift; + dev->y = ((pkt[1] << 7) | pkt[2]) >> shift; + dev->touch = (pkt[0] & 0x10) ? 1 : 0; + + return 1; +} + +static int eturbo_get_pkt_len(unsigned char *buf, int len) +{ + if (buf[0] & 0x80) + return 5; + if (buf[0] == 0x01) + return 3; + return 0; +} +#endif + + +/***************************************************************************** + * Gunze part + */ +#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE +static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +{ + if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80)) + return 0; + + dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F); + dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F); + dev->touch = pkt[0] & 0x20; + + return 1; +} +#endif + +/***************************************************************************** + * DMC TSC-10/25 Part + * + * Documentation about the controller and it's protocol can be found at + * http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf + * http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf + */ +#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 + +/* supported data rates. currently using 130 */ +#define TSC10_RATE_POINT 0x50 +#define TSC10_RATE_30 0x40 +#define TSC10_RATE_50 0x41 +#define TSC10_RATE_80 0x42 +#define TSC10_RATE_100 0x43 +#define TSC10_RATE_130 0x44 +#define TSC10_RATE_150 0x45 + +/* commands */ +#define TSC10_CMD_RESET 0x55 +#define TSC10_CMD_RATE 0x05 +#define TSC10_CMD_DATA1 0x01 + +static int dmc_tsc10_init(struct usbtouch_usb *usbtouch) +{ + struct usb_device *dev = usbtouch->udev; + int ret = -ENOMEM; + unsigned char *buf; + + buf = kmalloc(2, GFP_KERNEL); + if (!buf) + goto err_nobuf; + /* reset */ + buf[0] = buf[1] = 0xFF; + ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), + TSC10_CMD_RESET, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0, 0, buf, 2, USB_CTRL_SET_TIMEOUT); + if (ret < 0) + goto err_out; + if (buf[0] != 0x06 || buf[1] != 0x00) { + 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[1] != 0x00) && + (buf[0] != 0x15 || buf[1] != 0x01)) { + ret = -ENODEV; + goto err_out; + } + + /* start sending data */ + ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0), + TSC10_CMD_DATA1, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); +err_out: + kfree(buf); +err_nobuf: + return ret; +} + + +static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +{ + dev->x = ((pkt[2] & 0x03) << 8) | pkt[1]; + dev->y = ((pkt[4] & 0x03) << 8) | pkt[3]; + dev->touch = pkt[0] & 0x01; + + return 1; +} +#endif + + +/***************************************************************************** + * IRTOUCH Part + */ +#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH +static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +{ + dev->x = (pkt[3] << 8) | pkt[2]; + dev->y = (pkt[5] << 8) | pkt[4]; + dev->touch = (pkt[1] & 0x03) ? 1 : 0; + + return 1; +} +#endif + + +/***************************************************************************** + * IdealTEK URTC1000 Part + */ +#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK +#ifndef MULTI_PACKET +#define MULTI_PACKET +#endif +static int idealtek_get_pkt_len(unsigned char *buf, int len) +{ + if (buf[0] & 0x80) + return 5; + if (buf[0] == 0x01) + return len; + return 0; +} + +static int idealtek_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +{ + switch (pkt[0] & 0x98) { + case 0x88: + /* touch data in IdealTEK mode */ + dev->x = (pkt[1] << 5) | (pkt[2] >> 2); + dev->y = (pkt[3] << 5) | (pkt[4] >> 2); + dev->touch = (pkt[0] & 0x40) ? 1 : 0; + return 1; + + case 0x98: + /* touch data in MT emulation mode */ + dev->x = (pkt[2] << 5) | (pkt[1] >> 2); + dev->y = (pkt[4] << 5) | (pkt[3] >> 2); + dev->touch = (pkt[0] & 0x40) ? 1 : 0; + return 1; + + default: + return 0; + } +} +#endif + +/***************************************************************************** + * General Touch Part + */ +#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH +static int general_touch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +{ + dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1] ; + dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3] ; + dev->press = pkt[5] & 0xff; + dev->touch = pkt[0] & 0x01; + + return 1; +} +#endif + +/***************************************************************************** + * GoTop Part + */ +#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP +static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt) +{ + dev->x = ((pkt[1] & 0x38) << 4) | pkt[2]; + dev->y = ((pkt[1] & 0x07) << 7) | pkt[3]; + dev->touch = pkt[0] & 0x01; + return 1; +} +#endif + + +/***************************************************************************** + * the different device descriptors + */ +#ifdef MULTI_PACKET +static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, + unsigned char *pkt, int len); +#endif + +static struct usbtouch_device_info usbtouch_dev_info[] = { +#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX + [DEVTYPE_EGALAX] = { + .min_xc = 0x0, + .max_xc = 0x07ff, + .min_yc = 0x0, + .max_yc = 0x07ff, + .rept_size = 16, + .process_pkt = usbtouch_process_multi, + .get_pkt_len = egalax_get_pkt_len, + .read_data = egalax_read_data, + }, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT + [DEVTYPE_PANJIT] = { + .min_xc = 0x0, + .max_xc = 0x0fff, + .min_yc = 0x0, + .max_yc = 0x0fff, + .rept_size = 8, + .read_data = panjit_read_data, + }, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_3M + [DEVTYPE_3M] = { + .min_xc = 0x0, + .max_xc = 0x4000, + .min_yc = 0x0, + .max_yc = 0x4000, + .rept_size = 11, + .read_data = mtouch_read_data, + .init = mtouch_init, + }, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_ITM + [DEVTYPE_ITM] = { + .min_xc = 0x0, + .max_xc = 0x0fff, + .min_yc = 0x0, + .max_yc = 0x0fff, + .max_press = 0xff, + .rept_size = 8, + .read_data = itm_read_data, + }, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO + [DEVTYPE_ETURBO] = { + .min_xc = 0x0, + .max_xc = 0x07ff, + .min_yc = 0x0, + .max_yc = 0x07ff, + .rept_size = 8, + .process_pkt = usbtouch_process_multi, + .get_pkt_len = eturbo_get_pkt_len, + .read_data = eturbo_read_data, + }, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE + [DEVTYPE_GUNZE] = { + .min_xc = 0x0, + .max_xc = 0x0fff, + .min_yc = 0x0, + .max_yc = 0x0fff, + .rept_size = 4, + .read_data = gunze_read_data, + }, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10 + [DEVTYPE_DMC_TSC10] = { + .min_xc = 0x0, + .max_xc = 0x03ff, + .min_yc = 0x0, + .max_yc = 0x03ff, + .rept_size = 5, + .init = dmc_tsc10_init, + .read_data = dmc_tsc10_read_data, + }, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH + [DEVTYPE_IRTOUCH] = { + .min_xc = 0x0, + .max_xc = 0x0fff, + .min_yc = 0x0, + .max_yc = 0x0fff, + .rept_size = 8, + .read_data = irtouch_read_data, + }, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK + [DEVTYPE_IDEALTEK] = { + .min_xc = 0x0, + .max_xc = 0x0fff, + .min_yc = 0x0, + .max_yc = 0x0fff, + .rept_size = 8, + .process_pkt = usbtouch_process_multi, + .get_pkt_len = idealtek_get_pkt_len, + .read_data = idealtek_read_data, + }, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH + [DEVTYPE_GENERAL_TOUCH] = { + .min_xc = 0x0, + .max_xc = 0x0500, + .min_yc = 0x0, + .max_yc = 0x0500, + .rept_size = 7, + .read_data = general_touch_read_data, + }, +#endif + +#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP + [DEVTYPE_GOTOP] = { + .min_xc = 0x0, + .max_xc = 0x03ff, + .min_yc = 0x0, + .max_yc = 0x03ff, + .rept_size = 4, + .read_data = gotop_read_data, + }, +#endif +}; + + +/***************************************************************************** + * Generic Part + */ +static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch, + unsigned char *pkt, int len) +{ + struct usbtouch_device_info *type = usbtouch->type; + + if (!type->read_data(usbtouch, pkt)) + return; + + input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch); + + if (swap_xy) { + input_report_abs(usbtouch->input, ABS_X, usbtouch->y); + input_report_abs(usbtouch->input, ABS_Y, usbtouch->x); + } else { + input_report_abs(usbtouch->input, ABS_X, usbtouch->x); + input_report_abs(usbtouch->input, ABS_Y, usbtouch->y); + } + if (type->max_press) + input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press); + input_sync(usbtouch->input); +} + + +#ifdef MULTI_PACKET +static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, + unsigned char *pkt, int len) +{ + unsigned char *buffer; + int pkt_len, pos, buf_len, tmp; + + /* process buffer */ + if (unlikely(usbtouch->buf_len)) { + /* try to get size */ + pkt_len = usbtouch->type->get_pkt_len( + usbtouch->buffer, usbtouch->buf_len); + + /* drop? */ + if (unlikely(!pkt_len)) + goto out_flush_buf; + + /* need to append -pkt_len bytes before able to get size */ + if (unlikely(pkt_len < 0)) { + int append = -pkt_len; + if (unlikely(append > len)) + append = len; + if (usbtouch->buf_len + append >= usbtouch->type->rept_size) + goto out_flush_buf; + memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, append); + usbtouch->buf_len += append; + + pkt_len = usbtouch->type->get_pkt_len( + usbtouch->buffer, usbtouch->buf_len); + if (pkt_len < 0) + return; + } + + /* append */ + tmp = pkt_len - usbtouch->buf_len; + if (usbtouch->buf_len + tmp >= usbtouch->type->rept_size) + goto out_flush_buf; + memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp); + usbtouch_process_pkt(usbtouch, usbtouch->buffer, pkt_len); + + buffer = pkt + tmp; + buf_len = len - tmp; + } else { + buffer = pkt; + buf_len = len; + } + + /* loop over the received packet, process */ + pos = 0; + while (pos < buf_len) { + /* get packet len */ + pkt_len = usbtouch->type->get_pkt_len(buffer + pos, + buf_len - pos); + + /* unknown packet: skip one byte */ + if (unlikely(!pkt_len)) { + pos++; + continue; + } + + /* full packet: process */ + if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) { + usbtouch_process_pkt(usbtouch, buffer + pos, pkt_len); + } else { + /* incomplete packet: save in buffer */ + memcpy(usbtouch->buffer, buffer + pos, buf_len - pos); + usbtouch->buf_len = buf_len - pos; + return; + } + pos += pkt_len; + } + +out_flush_buf: + usbtouch->buf_len = 0; + return; +} +#endif + + +static void usbtouch_irq(struct urb *urb) +{ + struct usbtouch_usb *usbtouch = urb->context; + int retval; + + switch (urb->status) { + case 0: + /* success */ + break; + case -ETIME: + /* this urb is timing out */ + dbg("%s - urb timed out - was the device unplugged?", + __func__); + return; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + /* this urb is terminated, clean up */ + dbg("%s - urb shutting down with status: %d", + __func__, urb->status); + return; + default: + dbg("%s - nonzero urb status received: %d", + __func__, urb->status); + goto exit; + } + + usbtouch->type->process_pkt(usbtouch, usbtouch->data, urb->actual_length); + +exit: + retval = usb_submit_urb(urb, GFP_ATOMIC); + if (retval) + err("%s - usb_submit_urb failed with result: %d", + __func__, retval); +} + +static int usbtouch_open(struct input_dev *input) +{ + struct usbtouch_usb *usbtouch = input_get_drvdata(input); + + usbtouch->irq->dev = usbtouch->udev; + + if (usb_submit_urb(usbtouch->irq, GFP_KERNEL)) + return -EIO; + + return 0; +} + +static void usbtouch_close(struct input_dev *input) +{ + struct usbtouch_usb *usbtouch = input_get_drvdata(input); + + usb_kill_urb(usbtouch->irq); +} + + +static void usbtouch_free_buffers(struct usb_device *udev, + struct usbtouch_usb *usbtouch) +{ + usb_buffer_free(udev, usbtouch->type->rept_size, + usbtouch->data, usbtouch->data_dma); + kfree(usbtouch->buffer); +} + + +static int usbtouch_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct usbtouch_usb *usbtouch; + struct input_dev *input_dev; + struct usb_host_interface *interface; + struct usb_endpoint_descriptor *endpoint; + struct usb_device *udev = interface_to_usbdev(intf); + struct usbtouch_device_info *type; + int err = -ENOMEM; + + /* some devices are ignored */ + if (id->driver_info == DEVTYPE_IGNORE) + return -ENODEV; + + interface = intf->cur_altsetting; + endpoint = &interface->endpoint[0].desc; + + usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!usbtouch || !input_dev) + goto out_free; + + type = &usbtouch_dev_info[id->driver_info]; + usbtouch->type = type; + if (!type->process_pkt) + type->process_pkt = usbtouch_process_pkt; + + usbtouch->data = usb_buffer_alloc(udev, type->rept_size, + GFP_KERNEL, &usbtouch->data_dma); + if (!usbtouch->data) + goto out_free; + + if (type->get_pkt_len) { + usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL); + if (!usbtouch->buffer) + goto out_free_buffers; + } + + usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL); + if (!usbtouch->irq) { + dbg("%s - usb_alloc_urb failed: usbtouch->irq", __func__); + goto out_free_buffers; + } + + usbtouch->udev = udev; + usbtouch->input = input_dev; + + if (udev->manufacturer) + strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name)); + + if (udev->product) { + if (udev->manufacturer) + strlcat(usbtouch->name, " ", sizeof(usbtouch->name)); + strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name)); + } + + if (!strlen(usbtouch->name)) + snprintf(usbtouch->name, sizeof(usbtouch->name), + "USB Touchscreen %04x:%04x", + le16_to_cpu(udev->descriptor.idVendor), + le16_to_cpu(udev->descriptor.idProduct)); + + usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys)); + strlcat(usbtouch->phys, "/input0", sizeof(usbtouch->phys)); + + input_dev->name = usbtouch->name; + input_dev->phys = usbtouch->phys; + usb_to_input_id(udev, &input_dev->id); + input_dev->dev.parent = &intf->dev; + + input_set_drvdata(input_dev, usbtouch); + + input_dev->open = usbtouch_open; + input_dev->close = usbtouch_close; + + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); + input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); + input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0); + input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0); + if (type->max_press) + input_set_abs_params(input_dev, ABS_PRESSURE, type->min_press, + type->max_press, 0, 0); + + usb_fill_int_urb(usbtouch->irq, usbtouch->udev, + usb_rcvintpipe(usbtouch->udev, endpoint->bEndpointAddress), + usbtouch->data, type->rept_size, + usbtouch_irq, usbtouch, endpoint->bInterval); + + usbtouch->irq->dev = usbtouch->udev; + usbtouch->irq->transfer_dma = usbtouch->data_dma; + usbtouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + + /* device specific init */ + if (type->init) { + err = type->init(usbtouch); + if (err) { + dbg("%s - type->init() failed, err: %d", __func__, err); + goto out_free_buffers; + } + } + + err = input_register_device(usbtouch->input); + if (err) { + dbg("%s - input_register_device failed, err: %d", __func__, err); + goto out_free_buffers; + } + + usb_set_intfdata(intf, usbtouch); + + return 0; + +out_free_buffers: + usbtouch_free_buffers(udev, usbtouch); +out_free: + input_free_device(input_dev); + kfree(usbtouch); + return err; +} + +static void usbtouch_disconnect(struct usb_interface *intf) +{ + struct usbtouch_usb *usbtouch = usb_get_intfdata(intf); + + dbg("%s - called", __func__); + + if (!usbtouch) + return; + + dbg("%s - usbtouch is initialized, cleaning up", __func__); + usb_set_intfdata(intf, NULL); + usb_kill_urb(usbtouch->irq); + input_unregister_device(usbtouch->input); + usb_free_urb(usbtouch->irq); + usbtouch_free_buffers(interface_to_usbdev(intf), usbtouch); + kfree(usbtouch); +} + +MODULE_DEVICE_TABLE(usb, usbtouch_devices); + +static struct usb_driver usbtouch_driver = { + .name = "usbtouchscreen", + .probe = usbtouch_probe, + .disconnect = usbtouch_disconnect, + .id_table = usbtouch_devices, +}; + +static int __init usbtouch_init(void) +{ + return usb_register(&usbtouch_driver); +} + +static void __exit usbtouch_cleanup(void) +{ + usb_deregister(&usbtouch_driver); +} + +module_init(usbtouch_init); +module_exit(usbtouch_cleanup); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +MODULE_ALIAS("touchkitusb"); +MODULE_ALIAS("itmtouch"); +MODULE_ALIAS("mtouchusb"); |
