/******************************************************************************
* touchkitusb.c -- Driver for eGalax TouchKit USB Touchscreens
*
- * Copyright (C) 2004 by Daniel Ritz
+ * Copyright (C) 2004-2005 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
#include <linux/input.h>
#include <linux/module.h>
#include <linux/init.h>
-
-#if !defined(DEBUG) && defined(CONFIG_USB_DEBUG)
-#define DEBUG
-#endif
#include <linux/usb.h>
-
+#include <linux/usb_input.h>
#define TOUCHKIT_MIN_XC 0x0
#define TOUCHKIT_MAX_XC 0x07ff
#define TOUCHKIT_MAX_YC 0x07ff
#define TOUCHKIT_YC_FUZZ 0x0
#define TOUCHKIT_YC_FLAT 0x0
-#define TOUCHKIT_REPORT_DATA_SIZE 8
+#define TOUCHKIT_REPORT_DATA_SIZE 16
#define TOUCHKIT_DOWN 0x01
-#define TOUCHKIT_POINT_TOUCH 0x81
-#define TOUCHKIT_POINT_NOTOUCH 0x80
-#define TOUCHKIT_GET_TOUCHED(dat) ((((dat)[0]) & TOUCHKIT_DOWN) ? 1 : 0)
-#define TOUCHKIT_GET_X(dat) (((dat)[3] << 7) | (dat)[4])
-#define TOUCHKIT_GET_Y(dat) (((dat)[1] << 7) | (dat)[2])
+#define TOUCHKIT_PKT_TYPE_MASK 0xFE
+#define TOUCHKIT_PKT_TYPE_REPT 0x80
+#define TOUCHKIT_PKT_TYPE_DIAG 0x0A
#define DRIVER_VERSION "v0.1"
#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
struct touchkit_usb {
unsigned char *data;
dma_addr_t data_dma;
+ char buffer[TOUCHKIT_REPORT_DATA_SIZE];
+ int buf_len;
struct urb *irq;
struct usb_device *udev;
- struct input_dev input;
- int open;
+ struct input_dev *input;
char name[128];
char phys[64];
};
static struct usb_device_id touchkit_devices[] = {
{USB_DEVICE(0x3823, 0x0001)},
+ {USB_DEVICE(0x0123, 0x0001)},
{USB_DEVICE(0x0eef, 0x0001)},
+ {USB_DEVICE(0x0eef, 0x0002)},
{}
};
+/* helpers to read the data */
+static inline int touchkit_get_touched(char *data)
+{
+ return (data[0] & TOUCHKIT_DOWN) ? 1 : 0;
+}
+
+static inline int touchkit_get_x(char *data)
+{
+ return ((data[3] & 0x0F) << 7) | (data[4] & 0x7F);
+}
+
+static inline int touchkit_get_y(char *data)
+{
+ return ((data[1] & 0x0F) << 7) | (data[2] & 0x7F);
+}
+
+
+/* processes one input packet. */
+static void touchkit_process_pkt(struct touchkit_usb *touchkit,
+ struct pt_regs *regs, char *pkt)
+{
+ int x, y;
+
+ /* only process report packets */
+ if ((pkt[0] & TOUCHKIT_PKT_TYPE_MASK) != TOUCHKIT_PKT_TYPE_REPT)
+ return;
+
+ if (swap_xy) {
+ y = touchkit_get_x(pkt);
+ x = touchkit_get_y(pkt);
+ } else {
+ x = touchkit_get_x(pkt);
+ y = touchkit_get_y(pkt);
+ }
+
+ input_regs(touchkit->input, regs);
+ input_report_key(touchkit->input, BTN_TOUCH, touchkit_get_touched(pkt));
+ input_report_abs(touchkit->input, ABS_X, x);
+ input_report_abs(touchkit->input, ABS_Y, y);
+ input_sync(touchkit->input);
+}
+
+
+static int touchkit_get_pkt_len(char *buf)
+{
+ switch (buf[0] & TOUCHKIT_PKT_TYPE_MASK) {
+ case TOUCHKIT_PKT_TYPE_REPT:
+ return 5;
+
+ case TOUCHKIT_PKT_TYPE_DIAG:
+ return buf[1] + 2;
+ }
+
+ return 0;
+}
+
+static void touchkit_process(struct touchkit_usb *touchkit, int len,
+ struct pt_regs *regs)
+{
+ char *buffer;
+ int pkt_len, buf_len, pos;
+
+ /* if the buffer contains data, append */
+ if (unlikely(touchkit->buf_len)) {
+ int tmp;
+
+ /* if only 1 byte in buffer, add another one to get length */
+ if (touchkit->buf_len == 1)
+ touchkit->buffer[1] = touchkit->data[0];
+
+ pkt_len = touchkit_get_pkt_len(touchkit->buffer);
+
+ /* unknown packet: drop everything */
+ if (!pkt_len)
+ return;
+
+ /* append, process */
+ tmp = pkt_len - touchkit->buf_len;
+ memcpy(touchkit->buffer + touchkit->buf_len, touchkit->data, tmp);
+ touchkit_process_pkt(touchkit, regs, touchkit->buffer);
+
+ buffer = touchkit->data + tmp;
+ buf_len = len - tmp;
+ } else {
+ buffer = touchkit->data;
+ buf_len = len;
+ }
+
+ /* only one byte left in buffer */
+ if (unlikely(buf_len == 1)) {
+ touchkit->buffer[0] = buffer[0];
+ touchkit->buf_len = 1;
+ return;
+ }
+
+ /* loop over the buffer */
+ pos = 0;
+ while (pos < buf_len) {
+ /* get packet len */
+ pkt_len = touchkit_get_pkt_len(buffer + pos);
+
+ /* unknown packet: drop everything */
+ if (unlikely(!pkt_len))
+ return;
+
+ /* full packet: process */
+ if (likely(pkt_len <= buf_len)) {
+ touchkit_process_pkt(touchkit, regs, buffer + pos);
+ } else {
+ /* incomplete packet: save in buffer */
+ memcpy(touchkit->buffer, buffer + pos, buf_len - pos);
+ touchkit->buf_len = buf_len - pos;
+ }
+ pos += pkt_len;
+ }
+}
+
+
static void touchkit_irq(struct urb *urb, struct pt_regs *regs)
{
struct touchkit_usb *touchkit = urb->context;
int retval;
- int x, y;
switch (urb->status) {
case 0:
goto exit;
}
- if (swap_xy) {
- y = TOUCHKIT_GET_X(touchkit->data);
- x = TOUCHKIT_GET_Y(touchkit->data);
- } else {
- x = TOUCHKIT_GET_X(touchkit->data);
- y = TOUCHKIT_GET_Y(touchkit->data);
- }
-
- input_regs(&touchkit->input, regs);
- input_report_key(&touchkit->input, BTN_TOUCH,
- TOUCHKIT_GET_TOUCHED(touchkit->data));
- input_report_abs(&touchkit->input, ABS_X, x);
- input_report_abs(&touchkit->input, ABS_Y, y);
- input_sync(&touchkit->input);
+ touchkit_process(touchkit, urb->actual_length, regs);
exit:
retval = usb_submit_urb(urb, GFP_ATOMIC);
{
struct touchkit_usb *touchkit = input->private;
- if (touchkit->open++)
- return 0;
-
touchkit->irq->dev = touchkit->udev;
- if (usb_submit_urb(touchkit->irq, GFP_ATOMIC)) {
- touchkit->open--;
+ if (usb_submit_urb(touchkit->irq, GFP_ATOMIC))
return -EIO;
- }
return 0;
}
{
struct touchkit_usb *touchkit = input->private;
- if (!--touchkit->open)
- usb_kill_urb(touchkit->irq);
+ usb_kill_urb(touchkit->irq);
}
static int touchkit_alloc_buffers(struct usb_device *udev,
static int touchkit_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
- int ret;
struct touchkit_usb *touchkit;
+ struct input_dev *input_dev;
struct usb_host_interface *interface;
struct usb_endpoint_descriptor *endpoint;
struct usb_device *udev = interface_to_usbdev(intf);
- char path[64];
interface = intf->cur_altsetting;
endpoint = &interface->endpoint[0].desc;
- touchkit = kmalloc(sizeof(struct touchkit_usb), GFP_KERNEL);
- if (!touchkit)
- return -ENOMEM;
-
- memset(touchkit, 0, sizeof(struct touchkit_usb));
- touchkit->udev = udev;
-
- if (touchkit_alloc_buffers(udev, touchkit)) {
- ret = -ENOMEM;
+ touchkit = kzalloc(sizeof(struct touchkit_usb), GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!touchkit || !input_dev)
goto out_free;
- }
-
- touchkit->input.private = touchkit;
- touchkit->input.open = touchkit_open;
- touchkit->input.close = touchkit_close;
-
- usb_make_path(udev, path, 64);
- sprintf(touchkit->phys, "%s/input0", path);
-
- touchkit->input.name = touchkit->name;
- touchkit->input.phys = touchkit->phys;
- touchkit->input.id.bustype = BUS_USB;
- touchkit->input.id.vendor = le16_to_cpu(udev->descriptor.idVendor);
- touchkit->input.id.product = le16_to_cpu(udev->descriptor.idProduct);
- touchkit->input.id.version = le16_to_cpu(udev->descriptor.bcdDevice);
- touchkit->input.dev = &intf->dev;
-
- touchkit->input.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
- touchkit->input.absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
- touchkit->input.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
-
- /* Used to Scale Compensated Data */
- touchkit->input.absmin[ABS_X] = TOUCHKIT_MIN_XC;
- touchkit->input.absmax[ABS_X] = TOUCHKIT_MAX_XC;
- touchkit->input.absfuzz[ABS_X] = TOUCHKIT_XC_FUZZ;
- touchkit->input.absflat[ABS_X] = TOUCHKIT_XC_FLAT;
- touchkit->input.absmin[ABS_Y] = TOUCHKIT_MIN_YC;
- touchkit->input.absmax[ABS_Y] = TOUCHKIT_MAX_YC;
- touchkit->input.absfuzz[ABS_Y] = TOUCHKIT_YC_FUZZ;
- touchkit->input.absflat[ABS_Y] = TOUCHKIT_YC_FLAT;
- if (udev->manufacturer)
- strcat(touchkit->name, udev->manufacturer);
- if (udev->product)
- sprintf(touchkit->name, "%s %s", touchkit->name, udev->product);
-
- if (!strlen(touchkit->name))
- sprintf(touchkit->name, "USB Touchscreen %04x:%04x",
- touchkit->input.id.vendor, touchkit->input.id.product);
+ if (touchkit_alloc_buffers(udev, touchkit))
+ goto out_free;
touchkit->irq = usb_alloc_urb(0, GFP_KERNEL);
if (!touchkit->irq) {
dbg("%s - usb_alloc_urb failed: touchkit->irq", __FUNCTION__);
- ret = -ENOMEM;
goto out_free_buffers;
}
+ touchkit->udev = udev;
+ touchkit->input = input_dev;
+
+ if (udev->manufacturer)
+ strlcpy(touchkit->name, udev->manufacturer, sizeof(touchkit->name));
+
+ if (udev->product) {
+ if (udev->manufacturer)
+ strlcat(touchkit->name, " ", sizeof(touchkit->name));
+ strlcat(touchkit->name, udev->product, sizeof(touchkit->name));
+ }
+
+ if (!strlen(touchkit->name))
+ snprintf(touchkit->name, sizeof(touchkit->name),
+ "USB Touchscreen %04x:%04x",
+ le16_to_cpu(udev->descriptor.idVendor),
+ le16_to_cpu(udev->descriptor.idProduct));
+
+ usb_make_path(udev, touchkit->phys, sizeof(touchkit->phys));
+ strlcpy(touchkit->phys, "/input0", sizeof(touchkit->phys));
+
+ input_dev->name = touchkit->name;
+ input_dev->phys = touchkit->phys;
+ usb_to_input_id(udev, &input_dev->id);
+ input_dev->cdev.dev = &intf->dev;
+ input_dev->private = touchkit;
+ input_dev->open = touchkit_open;
+ input_dev->close = touchkit_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, TOUCHKIT_MIN_XC, TOUCHKIT_MAX_XC,
+ TOUCHKIT_XC_FUZZ, TOUCHKIT_XC_FLAT);
+ input_set_abs_params(input_dev, ABS_Y, TOUCHKIT_MIN_YC, TOUCHKIT_MAX_YC,
+ TOUCHKIT_YC_FUZZ, TOUCHKIT_YC_FLAT);
+
usb_fill_int_urb(touchkit->irq, touchkit->udev,
- usb_rcvintpipe(touchkit->udev, 0x81),
- touchkit->data, TOUCHKIT_REPORT_DATA_SIZE,
- touchkit_irq, touchkit, endpoint->bInterval);
+ usb_rcvintpipe(touchkit->udev, 0x81),
+ touchkit->data, TOUCHKIT_REPORT_DATA_SIZE,
+ touchkit_irq, touchkit, endpoint->bInterval);
- input_register_device(&touchkit->input);
+ touchkit->irq->transfer_dma = touchkit->data_dma;
+ touchkit->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
- printk(KERN_INFO "input: %s on %s\n", touchkit->name, path);
- usb_set_intfdata(intf, touchkit);
+ input_register_device(touchkit->input);
+ usb_set_intfdata(intf, touchkit);
return 0;
out_free_buffers:
touchkit_free_buffers(udev, touchkit);
out_free:
+ input_free_device(input_dev);
kfree(touchkit);
- return ret;
+ return -ENOMEM;
}
static void touchkit_disconnect(struct usb_interface *intf)
dbg("%s - touchkit is initialized, cleaning up", __FUNCTION__);
usb_set_intfdata(intf, NULL);
- input_unregister_device(&touchkit->input);
usb_kill_urb(touchkit->irq);
+ input_unregister_device(touchkit->input);
usb_free_urb(touchkit->irq);
touchkit_free_buffers(interface_to_usbdev(intf), touchkit);
kfree(touchkit);
MODULE_DEVICE_TABLE(usb, touchkit_devices);
static struct usb_driver touchkit_driver = {
- .owner = THIS_MODULE,
.name = "touchkitusb",
.probe = touchkit_probe,
.disconnect = touchkit_disconnect,
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