606 lines
15 KiB
C
606 lines
15 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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* - 3M/Microtouch
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* - ITM
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* - PanJit TouchSet
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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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*
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*****************************************************************************/
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//#define DEBUG
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#include <linux/config.h>
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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 "v0.3"
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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, struct pt_regs *regs, unsigned char *pkt, int len);
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int (*read_data) (unsigned char *pkt, int *x, int *y, int *touch, int *press);
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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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};
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static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
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struct pt_regs *regs, unsigned char *pkt, int len);
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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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};
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static struct usb_device_id usbtouch_devices[] = {
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#ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
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{USB_DEVICE(0x3823, 0x0001), .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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#endif
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#ifdef CONFIG_USB_TOUCHSCREEN_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_USB_TOUCHSCREEN_3M
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{USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
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#endif
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#ifdef CONFIG_USB_TOUCHSCREEN_ITM
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{USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
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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_USB_TOUCHSCREEN_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(unsigned char *pkt, int *x, int *y, int *touch, int *press)
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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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*x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
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*y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
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*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)
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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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return buf[1] + 2;
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}
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return 0;
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}
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static void egalax_process(struct usbtouch_usb *usbtouch, struct pt_regs *regs,
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unsigned char *pkt, int len)
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{
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unsigned char *buffer;
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int pkt_len, buf_len, pos;
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/* if the buffer contains data, append */
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if (unlikely(usbtouch->buf_len)) {
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int tmp;
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/* if only 1 byte in buffer, add another one to get length */
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if (usbtouch->buf_len == 1)
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usbtouch->buffer[1] = pkt[0];
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pkt_len = egalax_get_pkt_len(usbtouch->buffer);
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/* unknown packet: drop everything */
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if (!pkt_len)
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return;
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/* append, process */
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tmp = pkt_len - usbtouch->buf_len;
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memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
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usbtouch_process_pkt(usbtouch, regs, usbtouch->buffer, pkt_len);
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buffer = pkt + tmp;
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buf_len = len - tmp;
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} else {
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buffer = pkt;
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buf_len = len;
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}
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/* only one byte left in buffer */
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if (unlikely(buf_len == 1)) {
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usbtouch->buffer[0] = buffer[0];
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usbtouch->buf_len = 1;
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return;
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}
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/* loop over the buffer */
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pos = 0;
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while (pos < buf_len) {
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/* get packet len */
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pkt_len = egalax_get_pkt_len(buffer + pos);
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/* unknown packet: drop everything */
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if (unlikely(!pkt_len))
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return;
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/* full packet: process */
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if (likely(pkt_len <= buf_len)) {
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usbtouch_process_pkt(usbtouch, regs, buffer + pos, pkt_len);
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} else {
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/* incomplete packet: save in buffer */
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memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
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usbtouch->buf_len = buf_len - pos;
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}
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pos += pkt_len;
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}
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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_USB_TOUCHSCREEN_PANJIT
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static int panjit_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
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{
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*x = ((pkt[2] & 0x0F) << 8) | pkt[1];
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*y = ((pkt[4] & 0x0F) << 8) | pkt[3];
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*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_USB_TOUCHSCREEN_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(unsigned char *pkt, int *x, int *y, int *touch, int *press)
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{
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*x = (pkt[8] << 8) | pkt[7];
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*y = (pkt[10] << 8) | pkt[9];
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*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;
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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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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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return ret;
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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_USB_TOUCHSCREEN_ITM
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static int itm_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
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{
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*x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
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*x = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
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*press = ((pkt[2] & 0x1F) << 7) | (pkt[5] & 0x7F);
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*touch = ~pkt[7] & 0x20;
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return 1;
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}
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#endif
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/*****************************************************************************
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* the different device descriptors
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*/
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static struct usbtouch_device_info usbtouch_dev_info[] = {
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#ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
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[DEVTYPE_EGALAX] = {
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.min_xc = 0x0,
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.max_xc = 0x07ff,
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.min_yc = 0x0,
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.max_yc = 0x07ff,
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.rept_size = 16,
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.flags = USBTOUCH_FLG_BUFFER,
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.process_pkt = egalax_process,
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.read_data = egalax_read_data,
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},
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#endif
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#ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
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[DEVTYPE_PANJIT] = {
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.min_xc = 0x0,
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.max_xc = 0x0fff,
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.min_yc = 0x0,
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.max_yc = 0x0fff,
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.rept_size = 8,
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.read_data = panjit_read_data,
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},
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#endif
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#ifdef CONFIG_USB_TOUCHSCREEN_3M
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[DEVTYPE_3M] = {
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.min_xc = 0x0,
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.max_xc = 0x4000,
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.min_yc = 0x0,
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.max_yc = 0x4000,
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.rept_size = 11,
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.read_data = mtouch_read_data,
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.init = mtouch_init,
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},
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#endif
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#ifdef CONFIG_USB_TOUCHSCREEN_ITM
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[DEVTYPE_ITM] = {
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.min_xc = 0x0,
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.max_xc = 0x0fff,
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.min_yc = 0x0,
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.max_yc = 0x0fff,
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.max_press = 0xff,
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.rept_size = 8,
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.read_data = itm_read_data,
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},
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#endif
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};
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/*****************************************************************************
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* Generic Part
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*/
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static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
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struct pt_regs *regs, unsigned char *pkt, int len)
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{
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int x, y, touch, press;
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struct usbtouch_device_info *type = usbtouch->type;
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if (!type->read_data(pkt, &x, &y, &touch, &press))
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return;
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input_regs(usbtouch->input, regs);
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input_report_key(usbtouch->input, BTN_TOUCH, touch);
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if (swap_xy) {
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input_report_abs(usbtouch->input, ABS_X, y);
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input_report_abs(usbtouch->input, ABS_Y, x);
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} else {
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input_report_abs(usbtouch->input, ABS_X, x);
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input_report_abs(usbtouch->input, ABS_Y, y);
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}
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if (type->max_press)
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input_report_abs(usbtouch->input, ABS_PRESSURE, press);
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input_sync(usbtouch->input);
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}
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static void usbtouch_irq(struct urb *urb, struct pt_regs *regs)
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{
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struct usbtouch_usb *usbtouch = urb->context;
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int retval;
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switch (urb->status) {
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case 0:
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/* success */
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break;
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case -ETIMEDOUT:
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/* this urb is timing out */
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dbg("%s - urb timed out - was the device unplugged?",
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__FUNCTION__);
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return;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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/* this urb is terminated, clean up */
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dbg("%s - urb shutting down with status: %d",
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__FUNCTION__, urb->status);
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return;
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default:
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dbg("%s - nonzero urb status received: %d",
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__FUNCTION__, urb->status);
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goto exit;
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}
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usbtouch->type->process_pkt(usbtouch, regs, usbtouch->data, urb->actual_length);
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exit:
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retval = usb_submit_urb(urb, GFP_ATOMIC);
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if (retval)
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err("%s - usb_submit_urb failed with result: %d",
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__FUNCTION__, retval);
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}
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static int usbtouch_open(struct input_dev *input)
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{
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struct usbtouch_usb *usbtouch = input->private;
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usbtouch->irq->dev = usbtouch->udev;
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if (usb_submit_urb(usbtouch->irq, GFP_KERNEL))
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return -EIO;
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return 0;
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}
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static void usbtouch_close(struct input_dev *input)
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{
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struct usbtouch_usb *usbtouch = input->private;
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usb_kill_urb(usbtouch->irq);
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}
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static void usbtouch_free_buffers(struct usb_device *udev,
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struct usbtouch_usb *usbtouch)
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{
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if (usbtouch->data)
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usb_buffer_free(udev, usbtouch->type->rept_size,
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usbtouch->data, usbtouch->data_dma);
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kfree(usbtouch->buffer);
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}
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static int usbtouch_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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struct usbtouch_usb *usbtouch;
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struct input_dev *input_dev;
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struct usb_host_interface *interface;
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struct usb_endpoint_descriptor *endpoint;
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struct usb_device *udev = interface_to_usbdev(intf);
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struct usbtouch_device_info *type;
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int err;
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interface = intf->cur_altsetting;
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endpoint = &interface->endpoint[0].desc;
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usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!usbtouch || !input_dev)
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goto out_free;
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type = &usbtouch_dev_info[id->driver_info];
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usbtouch->type = type;
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if (!type->process_pkt)
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type->process_pkt = usbtouch_process_pkt;
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usbtouch->data = usb_buffer_alloc(udev, type->rept_size,
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SLAB_KERNEL, &usbtouch->data_dma);
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if (!usbtouch->data)
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goto out_free;
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if (type->flags & USBTOUCH_FLG_BUFFER) {
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usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
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if (!usbtouch->buffer)
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goto out_free_buffers;
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}
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usbtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
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if (!usbtouch->irq) {
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dbg("%s - usb_alloc_urb failed: usbtouch->irq", __FUNCTION__);
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goto out_free_buffers;
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}
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usbtouch->udev = udev;
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usbtouch->input = input_dev;
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if (udev->manufacturer)
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strlcpy(usbtouch->name, udev->manufacturer, sizeof(usbtouch->name));
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if (udev->product) {
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if (udev->manufacturer)
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strlcat(usbtouch->name, " ", sizeof(usbtouch->name));
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strlcat(usbtouch->name, udev->product, sizeof(usbtouch->name));
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}
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if (!strlen(usbtouch->name))
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snprintf(usbtouch->name, sizeof(usbtouch->name),
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"USB Touchscreen %04x:%04x",
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le16_to_cpu(udev->descriptor.idVendor),
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le16_to_cpu(udev->descriptor.idProduct));
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usb_make_path(udev, usbtouch->phys, sizeof(usbtouch->phys));
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strlcpy(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->cdev.dev = &intf->dev;
|
|
input_dev->private = 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, 0x81),
|
|
usbtouch->data, type->rept_size,
|
|
usbtouch_irq, usbtouch, endpoint->bInterval);
|
|
|
|
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 -ENOMEM;
|
|
}
|
|
|
|
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");
|