* - DMC TSC-10/25
* - IRTOUCHSYSTEMS/UNITOP
* - IdealTEK URTC1000
+ * - General Touch
* - GoTop Super_Q2/GogoPen/PenPower tablets
*
* Copyright (C) 2004-2007 by Daniel Ritz <daniel.ritz@gmx.ch>
#include <linux/usb/input.h>
-#define DRIVER_VERSION "v0.5"
+#define DRIVER_VERSION "v0.6"
#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
#define DRIVER_DESC "USB Touchscreen Driver"
int min_yc, max_yc;
int min_press, max_press;
int rept_size;
- int flags;
void (*process_pkt) (struct usbtouch_usb *usbtouch, unsigned char *pkt, int len);
+
+ /*
+ * used to get the packet len. possible return values:
+ * > 0: packet len
+ * = 0: skip one byte
+ * < 0: -return value more bytes needed
+ */
int (*get_pkt_len) (unsigned char *pkt, int len);
+
int (*read_data) (struct usbtouch_usb *usbtouch, unsigned char *pkt);
int (*init) (struct usbtouch_usb *usbtouch);
};
-#define USBTOUCH_FLG_BUFFER 0x01
-
-
/* a usbtouch device */
struct usbtouch_usb {
unsigned char *data;
};
-#if defined(CONFIG_TOUCHSCREEN_USB_EGALAX) || defined(CONFIG_TOUCHSCREEN_USB_ETURBO) || defined(CONFIG_TOUCHSCREEN_USB_IDEALTEK)
-#define MULTI_PACKET
-#endif
-
-#ifdef MULTI_PACKET
-static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
- unsigned char *pkt, int len);
-#endif
-
/* device types */
enum {
DEVTPYE_DUMMY = -1,
#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
+#ifndef MULTI_PACKET
+#define MULTI_PACKET
+#endif
+
#define EGALAX_PKT_TYPE_MASK 0xFE
#define EGALAX_PKT_TYPE_REPT 0x80
#define EGALAX_PKT_TYPE_DIAG 0x0A
* eTurboTouch part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_ETURBO
+#ifndef MULTI_PACKET
+#define MULTI_PACKET
+#endif
static int eturbo_read_data(struct usbtouch_usb *dev, unsigned char *pkt)
{
unsigned int shift;
static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
{
struct usb_device *dev = usbtouch->udev;
- int ret;
- unsigned char buf[2];
+ int ret = -ENOMEM;
+ unsigned char *buf;
+ buf = kmalloc(2, GFP_KERNEL);
+ if (!buf)
+ goto err_nobuf;
/* reset */
buf[0] = buf[1] = 0xFF;
ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
if (ret < 0)
- return ret;
- if (buf[0] != 0x06 || buf[1] != 0x00)
- return -ENODEV;
+ goto err_out;
+ if (buf[0] != 0x06 || buf[1] != 0x00) {
+ ret = -ENODEV;
+ goto err_out;
+ }
/* set coordinate output rate */
buf[0] = buf[1] = 0xFF;
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
TSC10_RATE_150, 0, buf, 2, USB_CTRL_SET_TIMEOUT);
if (ret < 0)
- return ret;
+ goto err_out;
if ((buf[0] != 0x06 || buf[1] != 0x00) &&
- (buf[0] != 0x15 || buf[1] != 0x01))
- return -ENODEV;
+ (buf[0] != 0x15 || buf[1] != 0x01)) {
+ ret = -ENODEV;
+ goto err_out;
+ }
/* start sending data */
ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
TSC10_CMD_DATA1,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
- if (ret < 0)
- return ret;
-
- return 0;
+err_out:
+ kfree(buf);
+err_nobuf:
+ return ret;
}
* IdealTEK URTC1000 Part
*/
#ifdef CONFIG_TOUCHSCREEN_USB_IDEALTEK
+#ifndef MULTI_PACKET
+#define MULTI_PACKET
+#endif
static int idealtek_get_pkt_len(unsigned char *buf, int len)
{
if (buf[0] & 0x80)
/*****************************************************************************
* the different device descriptors
*/
+#ifdef MULTI_PACKET
+static void usbtouch_process_multi(struct usbtouch_usb *usbtouch,
+ unsigned char *pkt, int len);
+#endif
+
static struct usbtouch_device_info usbtouch_dev_info[] = {
#ifdef CONFIG_TOUCHSCREEN_USB_EGALAX
[DEVTYPE_EGALAX] = {
.min_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,
.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,
.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,
pos = 0;
while (pos < buf_len) {
/* get packet len */
- pkt_len = usbtouch->type->get_pkt_len(buffer + pos, len);
+ pkt_len = usbtouch->type->get_pkt_len(buffer + pos,
+ buf_len - pos);
- /* unknown packet: drop everything */
- if (unlikely(!pkt_len))
- goto out_flush_buf;
+ /* unknown packet: skip one byte */
+ if (unlikely(!pkt_len)) {
+ pos++;
+ continue;
+ }
/* full packet: process */
if (likely((pkt_len > 0) && (pkt_len <= buf_len - pos))) {
if (!usbtouch->data)
goto out_free;
- if (type->flags & USBTOUCH_FLG_BUFFER) {
+ if (type->get_pkt_len) {
usbtouch->buffer = kmalloc(type->rept_size, GFP_KERNEL);
if (!usbtouch->buffer)
goto out_free_buffers;
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_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+ input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(input_dev, ABS_X, type->min_xc, type->max_xc, 0, 0);
input_set_abs_params(input_dev, ABS_Y, type->min_yc, type->max_yc, 0, 0);
if (type->max_press)