--- /dev/null
+/******************************************************************************
+ * usbtouchscreen.c
+ * Driver for USB Touchscreens, supporting those devices:
+ * - eGalax Touchkit
+ * - 3M/Microtouch
+ * - ITM
+ * - PanJit TouchSet
+ *
+ * Copyright (C) 2004-2006 by Daniel Ritz <daniel.ritz@gmx.ch>
+ * Copyright (C) by Todd E. Johnson (mtouchusb.c)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Driver is based on touchkitusb.c
+ * - ITM parts are from itmtouch.c
+ * - 3M parts are from mtouchusb.c
+ * - PanJit parts are from an unmerged driver by Lanslott Gish
+ *
+ *****************************************************************************/
+
+//#define DEBUG
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/usb.h>
+#include <linux/usb_input.h>
+
+
+#define DRIVER_VERSION "v0.3"
+#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
+#define DRIVER_DESC "USB Touchscreen Driver"
+
+static int swap_xy;
+module_param(swap_xy, bool, 0644);
+MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped.");
+
+/* device specifc data/functions */
+struct usbtouch_usb;
+struct usbtouch_device_info {
+ int min_xc, max_xc;
+ int min_yc, max_yc;
+ int min_press, max_press;
+ int rept_size;
+ int flags;
+
+ void (*process_pkt) (struct usbtouch_usb *usbtouch, struct pt_regs *regs, unsigned char *pkt, int len);
+ int (*read_data) (unsigned char *pkt, int *x, int *y, int *touch, int *press);
+ int (*init) (struct usbtouch_usb *usbtouch);
+};
+
+#define USBTOUCH_FLG_BUFFER 0x01
+
+
+/* a usbtouch device */
+struct usbtouch_usb {
+ unsigned char *data;
+ dma_addr_t data_dma;
+ unsigned char *buffer;
+ int buf_len;
+ struct urb *irq;
+ struct usb_device *udev;
+ struct input_dev *input;
+ struct usbtouch_device_info *type;
+ char name[128];
+ char phys[64];
+};
+
+static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
+ struct pt_regs *regs, unsigned char *pkt, int len);
+
+/* device types */
+enum {
+ DEVTPYE_DUMMY = -1,
+ DEVTYPE_EGALAX,
+ DEVTYPE_PANJIT,
+ DEVTYPE_3M,
+ DEVTYPE_ITM,
+};
+
+static struct usb_device_id usbtouch_devices[] = {
+#ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
+ {USB_DEVICE(0x3823, 0x0001), .driver_info = DEVTYPE_EGALAX},
+ {USB_DEVICE(0x0123, 0x0001), .driver_info = DEVTYPE_EGALAX},
+ {USB_DEVICE(0x0eef, 0x0001), .driver_info = DEVTYPE_EGALAX},
+ {USB_DEVICE(0x0eef, 0x0002), .driver_info = DEVTYPE_EGALAX},
+#endif
+
+#ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
+ {USB_DEVICE(0x134c, 0x0001), .driver_info = DEVTYPE_PANJIT},
+ {USB_DEVICE(0x134c, 0x0002), .driver_info = DEVTYPE_PANJIT},
+ {USB_DEVICE(0x134c, 0x0003), .driver_info = DEVTYPE_PANJIT},
+ {USB_DEVICE(0x134c, 0x0004), .driver_info = DEVTYPE_PANJIT},
+#endif
+
+#ifdef CONFIG_USB_TOUCHSCREEN_3M
+ {USB_DEVICE(0x0596, 0x0001), .driver_info = DEVTYPE_3M},
+#endif
+
+#ifdef CONFIG_USB_TOUCHSCREEN_ITM
+ {USB_DEVICE(0x0403, 0xf9e9), .driver_info = DEVTYPE_ITM},
+#endif
+
+ {}
+};
+
+
+/*****************************************************************************
+ * eGalax part
+ */
+
+#ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
+
+#define EGALAX_PKT_TYPE_MASK 0xFE
+#define EGALAX_PKT_TYPE_REPT 0x80
+#define EGALAX_PKT_TYPE_DIAG 0x0A
+
+static int egalax_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
+{
+ if ((pkt[0] & EGALAX_PKT_TYPE_MASK) != EGALAX_PKT_TYPE_REPT)
+ return 0;
+
+ *x = ((pkt[3] & 0x0F) << 7) | (pkt[4] & 0x7F);
+ *y = ((pkt[1] & 0x0F) << 7) | (pkt[2] & 0x7F);
+ *touch = pkt[0] & 0x01;
+
+ return 1;
+
+}
+
+static int egalax_get_pkt_len(unsigned char *buf)
+{
+ switch (buf[0] & EGALAX_PKT_TYPE_MASK) {
+ case EGALAX_PKT_TYPE_REPT:
+ return 5;
+
+ case EGALAX_PKT_TYPE_DIAG:
+ return buf[1] + 2;
+ }
+
+ return 0;
+}
+
+static void egalax_process(struct usbtouch_usb *usbtouch, struct pt_regs *regs,
+ unsigned char *pkt, int len)
+{
+ unsigned char *buffer;
+ int pkt_len, buf_len, pos;
+
+ /* if the buffer contains data, append */
+ if (unlikely(usbtouch->buf_len)) {
+ int tmp;
+
+ /* if only 1 byte in buffer, add another one to get length */
+ if (usbtouch->buf_len == 1)
+ usbtouch->buffer[1] = pkt[0];
+
+ pkt_len = egalax_get_pkt_len(usbtouch->buffer);
+
+ /* unknown packet: drop everything */
+ if (!pkt_len)
+ return;
+
+ /* append, process */
+ tmp = pkt_len - usbtouch->buf_len;
+ memcpy(usbtouch->buffer + usbtouch->buf_len, pkt, tmp);
+ usbtouch_process_pkt(usbtouch, regs, usbtouch->buffer, pkt_len);
+
+ buffer = pkt + tmp;
+ buf_len = len - tmp;
+ } else {
+ buffer = pkt;
+ buf_len = len;
+ }
+
+ /* only one byte left in buffer */
+ if (unlikely(buf_len == 1)) {
+ usbtouch->buffer[0] = buffer[0];
+ usbtouch->buf_len = 1;
+ return;
+ }
+
+ /* loop over the buffer */
+ pos = 0;
+ while (pos < buf_len) {
+ /* get packet len */
+ pkt_len = egalax_get_pkt_len(buffer + pos);
+
+ /* unknown packet: drop everything */
+ if (unlikely(!pkt_len))
+ return;
+
+ /* full packet: process */
+ if (likely(pkt_len <= buf_len)) {
+ usbtouch_process_pkt(usbtouch, regs, buffer + pos, pkt_len);
+ } else {
+ /* incomplete packet: save in buffer */
+ memcpy(usbtouch->buffer, buffer + pos, buf_len - pos);
+ usbtouch->buf_len = buf_len - pos;
+ }
+ pos += pkt_len;
+ }
+}
+#endif
+
+
+/*****************************************************************************
+ * PanJit Part
+ */
+#ifdef CONFIG_USB_TOUCHSCREEN_PANJIT
+static int panjit_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
+{
+ *x = ((pkt[2] & 0x0F) << 8) | pkt[1];
+ *y = ((pkt[4] & 0x0F) << 8) | pkt[3];
+ *touch = pkt[0] & 0x01;
+
+ return 1;
+}
+#endif
+
+
+/*****************************************************************************
+ * 3M/Microtouch Part
+ */
+#ifdef CONFIG_USB_TOUCHSCREEN_3M
+
+#define MTOUCHUSB_ASYNC_REPORT 1
+#define MTOUCHUSB_RESET 7
+#define MTOUCHUSB_REQ_CTRLLR_ID 10
+
+static int mtouch_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
+{
+ *x = (pkt[8] << 8) | pkt[7];
+ *y = (pkt[10] << 8) | pkt[9];
+ *touch = (pkt[2] & 0x40) ? 1 : 0;
+
+ return 1;
+}
+
+static int mtouch_init(struct usbtouch_usb *usbtouch)
+{
+ int ret;
+
+ ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
+ MTOUCHUSB_RESET,
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
+ dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
+ __FUNCTION__, ret);
+ if (ret < 0)
+ return ret;
+
+ ret = usb_control_msg(usbtouch->udev, usb_rcvctrlpipe(usbtouch->udev, 0),
+ MTOUCHUSB_ASYNC_REPORT,
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
+ dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
+ __FUNCTION__, ret);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+#endif
+
+
+/*****************************************************************************
+ * ITM Part
+ */
+#ifdef CONFIG_USB_TOUCHSCREEN_ITM
+static int itm_read_data(unsigned char *pkt, int *x, int *y, int *touch, int *press)
+{
+ *x = ((pkt[0] & 0x1F) << 7) | (pkt[3] & 0x7F);
+ *x = ((pkt[1] & 0x1F) << 7) | (pkt[4] & 0x7F);
+ *press = ((pkt[2] & 0x1F) << 7) | (pkt[5] & 0x7F);
+ *touch = ~pkt[7] & 0x20;
+
+ return 1;
+}
+#endif
+
+
+/*****************************************************************************
+ * the different device descriptors
+ */
+static struct usbtouch_device_info usbtouch_dev_info[] = {
+#ifdef CONFIG_USB_TOUCHSCREEN_EGALAX
+ [DEVTYPE_EGALAX] = {
+ .min_xc = 0x0,
+ .max_xc = 0x07ff,
+ .min_yc = 0x0,
+ .max_yc = 0x07ff,
+ .rept_size = 16,
+ .flags = USBTOUCH_FLG_BUFFER,
+ .process_pkt = egalax_process,
+ .read_data = egalax_read_data,
+ },
+#endif
+
+#ifdef CONFIG_USB_TOUCHSCREEN_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_USB_TOUCHSCREEN_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_USB_TOUCHSCREEN_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
+};
+
+
+/*****************************************************************************
+ * Generic Part
+ */
+static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch,
+ struct pt_regs *regs, unsigned char *pkt, int len)
+{
+ int x, y, touch, press;
+ struct usbtouch_device_info *type = usbtouch->type;
+
+ if (!type->read_data(pkt, &x, &y, &touch, &press))
+ return;
+
+ input_regs(usbtouch->input, regs);
+ input_report_key(usbtouch->input, BTN_TOUCH, touch);
+
+ if (swap_xy) {
+ input_report_abs(usbtouch->input, ABS_X, y);
+ input_report_abs(usbtouch->input, ABS_Y, x);
+ } else {
+ input_report_abs(usbtouch->input, ABS_X, x);
+ input_report_abs(usbtouch->input, ABS_Y, y);
+ }
+ if (type->max_press)
+ input_report_abs(usbtouch->input, ABS_PRESSURE, press);
+ input_sync(usbtouch->input);
+}
+
+
+static void usbtouch_irq(struct urb *urb, struct pt_regs *regs)
+{
+ struct usbtouch_usb *usbtouch = urb->context;
+ int retval;
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+ case -ETIMEDOUT:
+ /* 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, regs, 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->private;
+
+ 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->private;
+
+ usb_kill_urb(usbtouch->irq);
+}
+
+
+static void usbtouch_free_buffers(struct usb_device *udev,
+ struct usbtouch_usb *usbtouch)
+{
+ if (usbtouch->data)
+ 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;
+
+ 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,
+ SLAB_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));
+ 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");
projects / linux-2.6 / commitdiff