961 lines
24 KiB
C
961 lines
24 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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*
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* Copyright (C) 2004-2006 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 "v0.5"
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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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int flags;
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void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
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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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#define USBTOUCH_FLG_BUFFER 0x01
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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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#if defined(CONFIG_TOUCHSCREEN_USB_EGALAX) || defined(CONFIG_TOUCHSCREEN_USB_ETURBO) || defined(CONFIG_TOUCHSCREEN_USB_IDEALTEK)
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#define MULTI_PACKET
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#endif
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#ifdef MULTI_PACKET
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static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
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unsigned char *pkt, int len);
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#endif
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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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};
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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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{}
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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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#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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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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|
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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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/*****************************************************************************
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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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/*****************************************************************************
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* IdealTEK URTC1000 Part
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*/
|
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#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
|
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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)
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{
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switch (pkt[0] & 0x98) {
|
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case 0x88:
|
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/* touch data in IdealTEK mode */
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dev->x = (pkt[1] << 5) | (pkt[2] >> 2);
|
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dev->y = (pkt[3] << 5) | (pkt[4] >> 2);
|
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dev->touch = (pkt[0] & 0x40) ? 1 : 0;
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return 1;
|
|
|
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case 0x98:
|
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/* touch data in MT emulation mode */
|
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dev->x = (pkt[2] << 5) | (pkt[1] >> 2);
|
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dev->y = (pkt[4] << 5) | (pkt[3] >> 2);
|
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dev->touch = (pkt[0] & 0x40) ? 1 : 0;
|
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return 1;
|
|
|
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default:
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return 0;
|
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}
|
|
}
|
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#endif
|
|
|
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/*****************************************************************************
|
|
* 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
|
|
|
|
/*****************************************************************************
|
|
* the different device descriptors
|
|
*/
|
|
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,
|
|
.flags = USBTOUCH_FLG_BUFFER,
|
|
.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,
|
|
.flags = USBTOUCH_FLG_BUFFER,
|
|
.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,
|
|
.flags = USBTOUCH_FLG_BUFFER,
|
|
.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
|
|
|
|
};
|
|
|
|
|
|
/*****************************************************************************
|
|
* 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, len);
|
|
|
|
/* unknown packet: drop everything */
|
|
if (unlikely(!pkt_len))
|
|
goto out_flush_buf;
|
|
|
|
/* 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->flags & USBTOUCH_FLG_BUFFER) {
|
|
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(EV_KEY) | BIT(EV_ABS);
|
|
input_dev->keybit[LONG(BTN_TOUCH)] = BIT(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");
|