62aa366d9b
Fix a buffer overflow in mutli-packet handling code. The overflow can only happen with eGalax devices and is even there very unlikely (only non-report packet are affected any only when truncated after the first byte). Also changes the mutli-packet handling code not to drop unknown packets, but rather just drop one byte. This allows synchronizing on report packets in the data stream. It's required for some egalax devices to work at all. Also remove the pointless 'flags' member of the device struct and set the version number to 0.6, plus some minor cleanups. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
1005 lines
25 KiB
C
1005 lines
25 KiB
C
/******************************************************************************
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* usbtouchscreen.c
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* Driver for USB Touchscreens, supporting those devices:
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* - eGalax Touchkit
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* includes eTurboTouch CT-410/510/700
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* - 3M/Microtouch EX II series
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* - ITM
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* - PanJit TouchSet
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* - eTurboTouch
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* - Gunze AHL61
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* - DMC TSC-10/25
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* - IRTOUCHSYSTEMS/UNITOP
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* - IdealTEK URTC1000
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* - General Touch
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* - GoTop Super_Q2/GogoPen/PenPower tablets
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*
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* Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
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* Copyright (C) by Todd E. Johnson (mtouchusb.c)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Driver is based on touchkitusb.c
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* - ITM parts are from itmtouch.c
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* - 3M parts are from mtouchusb.c
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* - PanJit parts are from an unmerged driver by Lanslott Gish
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* - DMC TSC 10/25 are from Holger Schurig, with ideas from an unmerged
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* driver from Marius Vollmer
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*
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*****************************************************************************/
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//#define DEBUG
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/usb.h>
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#include <linux/usb/input.h>
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#define DRIVER_VERSION "v0.6"
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#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
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#define DRIVER_DESC "USB Touchscreen Driver"
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static int swap_xy;
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module_param(swap_xy, bool, 0644);
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MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
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/* device specifc data/functions */
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struct usbtouch_usb;
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struct usbtouch_device_info {
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int min_xc, max_xc;
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int min_yc, max_yc;
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int min_press, max_press;
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int rept_size;
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void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
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/*
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* used to get the packet len. possible return values:
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* > 0: packet len
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* = 0: skip one byte
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* < 0: -return value more bytes needed
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*/
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int (*get_pkt_len) (unsigned char *pkt, int len);
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int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
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int (*init) (struct usbtouch_usb *usbtouch);
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};
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/* a usbtouch device */
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struct usbtouch_usb {
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unsigned char *data;
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dma_addr_t data_dma;
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unsigned char *buffer;
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int buf_len;
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struct urb *irq;
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struct usb_device *udev;
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struct input_dev *input;
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struct usbtouch_device_info *type;
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char name[128];
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char phys[64];
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int x, y;
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int touch, press;
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};
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/* device types */
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enum {
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DEVTPYE_DUMMY = -1,
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DEVTYPE_EGALAX,
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DEVTYPE_PANJIT,
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DEVTYPE_3M,
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DEVTYPE_ITM,
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DEVTYPE_ETURBO,
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DEVTYPE_GUNZE,
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DEVTYPE_DMC_TSC10,
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DEVTYPE_IRTOUCH,
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DEVTYPE_IDEALTEK,
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DEVTYPE_GENERAL_TOUCH,
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DEVTYPE_GOTOP,
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};
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static struct usb_device_id usbtouch_devices[] = {
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#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
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{USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
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{USB_DEVICE(0x3823, 0x0002), .driver_info = DEVTYPE_EGALAX},
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{USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
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{USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
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{USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
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{USB_DEVICE(0x1234, 0x0001), .driver_info = DEVTYPE_EGALAX},
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{USB_DEVICE(0x1234, 0x0002), .driver_info = DEVTYPE_EGALAX},
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#endif
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#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
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{USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
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{USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
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{USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
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{USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
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#endif
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#ifdef CONFIG_TOUCHSCREEN_USB_3M
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{USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
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#endif
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#ifdef CONFIG_TOUCHSCREEN_USB_ITM
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{USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
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#endif
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#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
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{USB_DEVICE(0x1234, 0x5678), .driver_info = DEVTYPE_ETURBO},
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#endif
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#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
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{USB_DEVICE(0x0637, 0x0001), .driver_info = DEVTYPE_GUNZE},
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#endif
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#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
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{USB_DEVICE(0x0afa, 0x03e8), .driver_info = DEVTYPE_DMC_TSC10},
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#endif
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#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
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{USB_DEVICE(0x595a, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
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{USB_DEVICE(0x6615, 0x0001), .driver_info = DEVTYPE_IRTOUCH},
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#endif
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#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
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{USB_DEVICE(0x1391, 0x1000), .driver_info = DEVTYPE_IDEALTEK},
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#endif
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#ifdef CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH
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{USB_DEVICE(0x0dfc, 0x0001), .driver_info = DEVTYPE_GENERAL_TOUCH},
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#endif
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#ifdef CONFIG_TOUCHSCREEN_USB_GOTOP
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{USB_DEVICE(0x08f2, 0x007f), .driver_info = DEVTYPE_GOTOP},
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{USB_DEVICE(0x08f2, 0x00ce), .driver_info = DEVTYPE_GOTOP},
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{USB_DEVICE(0x08f2, 0x00f4), .driver_info = DEVTYPE_GOTOP},
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#endif
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{}
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};
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/*****************************************************************************
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* eGalax part
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*/
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#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
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#ifndef MULTI_PACKET
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#define MULTI_PACKET
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#endif
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#define EGALAX_PKT_TYPE_MASK 0xFE
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#define EGALAX_PKT_TYPE_REPT 0x80
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#define EGALAX_PKT_TYPE_DIAG 0x0A
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static int egalax_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
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{
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if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
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return 0;
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dev->x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
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dev->y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
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dev->touch = pkt[0] & 0x01;
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return 1;
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}
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static int egalax_get_pkt_len(unsigned char *buf, int len)
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{
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switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
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case EGALAX_PKT_TYPE_REPT:
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return 5;
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case EGALAX_PKT_TYPE_DIAG:
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if (len < 2)
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return -1;
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return buf[1] + 2;
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}
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return 0;
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}
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#endif
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/*****************************************************************************
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* PanJit Part
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*/
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#ifdef CONFIG_TOUCHSCREEN_USB_PANJIT
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static int panjit_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
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{
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dev->x = ((pkt[2] & 0x0F) << 8) | pkt[1];
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dev->y = ((pkt[4] & 0x0F) << 8) | pkt[3];
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dev->touch = pkt[0] & 0x01;
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return 1;
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}
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#endif
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/*****************************************************************************
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* 3M/Microtouch Part
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*/
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#ifdef CONFIG_TOUCHSCREEN_USB_3M
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#define MTOUCHUSB_ASYNC_REPORT 1
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#define MTOUCHUSB_RESET 7
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#define MTOUCHUSB_REQ_CTRLLR_ID 10
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static int mtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
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{
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dev->x = (pkt[8] << 8) | pkt[7];
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dev->y = (pkt[10] << 8) | pkt[9];
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dev->touch = (pkt[2] & 0x40) ? 1 : 0;
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return 1;
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}
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static int mtouch_init(struct usbtouch_usb *usbtouch)
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{
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int ret, i;
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ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
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MTOUCHUSB_RESET,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
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dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
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__FUNCTION__, ret);
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if (ret < 0)
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return ret;
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msleep(150);
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for (i = 0; i < 3; i++) {
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ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
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MTOUCHUSB_ASYNC_REPORT,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
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dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
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__FUNCTION__, ret);
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if (ret >= 0)
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break;
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if (ret != -EPIPE)
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return ret;
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}
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return 0;
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}
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#endif
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/*****************************************************************************
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* ITM Part
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*/
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#ifdef CONFIG_TOUCHSCREEN_USB_ITM
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static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
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{
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int touch;
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/*
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* ITM devices report invalid x/y data if not touched.
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* if the screen was touched before but is not touched any more
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* report touch as 0 with the last valid x/y data once. then stop
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* reporting data until touched again.
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*/
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dev->press = ((pkt[2] & 0x01) << 7) | (pkt[5] & 0x7F);
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touch = ~pkt[7] & 0x20;
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if (!touch) {
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if (dev->touch) {
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dev->touch = 0;
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return 1;
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}
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return 0;
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}
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dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
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dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
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dev->touch = touch;
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return 1;
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}
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#endif
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/*****************************************************************************
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* eTurboTouch part
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*/
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#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
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#ifndef MULTI_PACKET
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#define MULTI_PACKET
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#endif
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static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
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{
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unsigned int shift;
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/* packets should start with sync */
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if (!(pkt[0] & 0x80))
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return 0;
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shift = (6 - (pkt[0] & 0x03));
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dev->x = ((pkt[3] << 7) | pkt[4]) >> shift;
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dev->y = ((pkt[1] << 7) | pkt[2]) >> shift;
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dev->touch = (pkt[0] & 0x10) ? 1 : 0;
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return 1;
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}
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static int eturbo_get_pkt_len(unsigned char *buf, int len)
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{
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if (buf[0] & 0x80)
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return 5;
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if (buf[0] == 0x01)
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return 3;
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return 0;
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}
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#endif
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/*****************************************************************************
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* Gunze part
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*/
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#ifdef CONFIG_TOUCHSCREEN_USB_GUNZE
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static int gunze_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
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{
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if (!(pkt[0] & 0x80) || ((pkt[1] | pkt[2] | pkt[3]) & 0x80))
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return 0;
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dev->x = ((pkt[0] & 0x1F) << 7) | (pkt[2] & 0x7F);
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dev->y = ((pkt[1] & 0x1F) << 7) | (pkt[3] & 0x7F);
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dev->touch = pkt[0] & 0x20;
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return 1;
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}
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#endif
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/*****************************************************************************
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* DMC TSC-10/25 Part
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*
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* Documentation about the controller and it's protocol can be found at
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* http://www.dmccoltd.com/files/controler/tsc10usb_pi_e.pdf
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* http://www.dmccoltd.com/files/controler/tsc25_usb_e.pdf
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*/
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#ifdef CONFIG_TOUCHSCREEN_USB_DMC_TSC10
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/* supported data rates. currently using 130 */
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#define TSC10_RATE_POINT 0x50
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#define TSC10_RATE_30 0x40
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#define TSC10_RATE_50 0x41
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#define TSC10_RATE_80 0x42
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#define TSC10_RATE_100 0x43
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#define TSC10_RATE_130 0x44
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#define TSC10_RATE_150 0x45
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/* commands */
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#define TSC10_CMD_RESET 0x55
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#define TSC10_CMD_RATE 0x05
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#define TSC10_CMD_DATA1 0x01
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static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
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{
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struct usb_device *dev = usbtouch->udev;
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int ret;
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unsigned char buf[2];
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/* reset */
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buf[0] = buf[1] = 0xFF;
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ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
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TSC10_CMD_RESET,
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
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if (ret < 0)
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return ret;
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if (buf[0] != 0x06 || buf[1] != 0x00)
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return -ENODEV;
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/* set coordinate output rate */
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buf[0] = buf[1] = 0xFF;
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ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
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TSC10_CMD_RATE,
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
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if (ret < 0)
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return ret;
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if ((buf[0] != 0x06 || buf[1] != 0x00) &&
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(buf[0] != 0x15 || buf[1] != 0x01))
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return -ENODEV;
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/* start sending data */
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ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
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TSC10_CMD_DATA1,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int dmc_tsc10_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
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{
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dev->x = ((pkt[2] & 0x03) << 8) | pkt[1];
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dev->y = ((pkt[4] & 0x03) << 8) | pkt[3];
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dev->touch = pkt[0] & 0x01;
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return 1;
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}
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#endif
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/*****************************************************************************
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* IRTOUCH Part
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*/
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#ifdef CONFIG_TOUCHSCREEN_USB_IRTOUCH
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static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
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{
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dev->x = (pkt[3] << 8) | pkt[2];
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dev->y = (pkt[5] << 8) | pkt[4];
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dev->touch = (pkt[1] & 0x03) ? 1 : 0;
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return 1;
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}
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#endif
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/*****************************************************************************
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* IdealTEK URTC1000 Part
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*/
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#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
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#ifndef MULTI_PACKET
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#define MULTI_PACKET
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#endif
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static int idealtek_get_pkt_len(unsigned char *buf, int len)
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{
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if (buf[0] & 0x80)
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return 5;
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if (buf[0] == 0x01)
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return len;
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return 0;
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}
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|
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?",
|
|
__FUNCTION__);
|
|
return;
|
|
case -ECONNRESET:
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
/* this urb is terminated, clean up */
|
|
dbg("%s - urb shutting down with status: %d",
|
|
__FUNCTION__, urb->status);
|
|
return;
|
|
default:
|
|
dbg("%s - nonzero urb status received: %d",
|
|
__FUNCTION__, 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",
|
|
__FUNCTION__, 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;
|
|
|
|
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", __FUNCTION__);
|
|
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", __FUNCTION__, err);
|
|
goto out_free_buffers;
|
|
}
|
|
}
|
|
|
|
err = input_register_device(usbtouch->input);
|
|
if (err) {
|
|
dbg("%s - input_register_device failed, err: %d", __FUNCTION__, 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", __FUNCTION__);
|
|
|
|
if (!usbtouch)
|
|
return;
|
|
|
|
dbg("%s - usbtouch is initialized, cleaning up", __FUNCTION__);
|
|
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");
|