diff options
Diffstat (limited to 'drivers/input/touchscreen/usbtouchscreen.c')
| -rw-r--r-- | drivers/input/touchscreen/usbtouchscreen.c | 55 |
1 files changed, 33 insertions, 22 deletions
diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c index 19055e7381f8..63f9664a066f 100644 --- a/drivers/input/touchscreen/usbtouchscreen.c +++ b/drivers/input/touchscreen/usbtouchscreen.c @@ -11,6 +11,7 @@ * - 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> @@ -50,7 +51,7 @@ #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" @@ -65,17 +66,21 @@ struct usbtouch_device_info { 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; @@ -94,15 +99,6 @@ struct usbtouch_usb { }; -#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, @@ -186,6 +182,10 @@ static struct usb_device_id usbtouch_devices[] = { #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 @@ -323,6 +323,9 @@ static int itm_read_data(struct usbtouch_usb *dev, unsigned char *pkt) * 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; @@ -461,6 +464,9 @@ static int irtouch_read_data(struct usbtouch_usb *dev, unsigned char *pkt) * 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) @@ -525,6 +531,11 @@ static int gotop_read_data(struct usbtouch_usb *dev, unsigned char *pkt) /***************************************************************************** * 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] = { @@ -533,7 +544,6 @@ static struct usbtouch_device_info usbtouch_dev_info[] = { .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, @@ -582,7 +592,6 @@ static struct usbtouch_device_info usbtouch_dev_info[] = { .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, @@ -630,7 +639,6 @@ static struct usbtouch_device_info usbtouch_dev_info[] = { .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, @@ -738,11 +746,14 @@ static void usbtouch_process_multi(struct usbtouch_usb *usbtouch, 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))) { @@ -857,7 +868,7 @@ static int usbtouch_probe(struct usb_interface *intf, 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; |