forked from Minki/linux
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
311 lines
8.2 KiB
C
311 lines
8.2 KiB
C
/******************************************************************************
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* touchkitusb.c -- Driver for eGalax TouchKit USB Touchscreens
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*
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* Copyright (C) 2004 by Daniel Ritz
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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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* Based upon mtouchusb.c
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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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#if !defined(DEBUG) && defined(CONFIG_USB_DEBUG)
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#define DEBUG
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#endif
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#include <linux/usb.h>
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#define TOUCHKIT_MIN_XC 0x0
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#define TOUCHKIT_MAX_XC 0x07ff
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#define TOUCHKIT_XC_FUZZ 0x0
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#define TOUCHKIT_XC_FLAT 0x0
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#define TOUCHKIT_MIN_YC 0x0
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#define TOUCHKIT_MAX_YC 0x07ff
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#define TOUCHKIT_YC_FUZZ 0x0
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#define TOUCHKIT_YC_FLAT 0x0
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#define TOUCHKIT_REPORT_DATA_SIZE 8
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#define TOUCHKIT_DOWN 0x01
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#define TOUCHKIT_POINT_TOUCH 0x81
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#define TOUCHKIT_POINT_NOTOUCH 0x80
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#define TOUCHKIT_GET_TOUCHED(dat) ((((dat)[0]) & TOUCHKIT_DOWN) ? 1 : 0)
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#define TOUCHKIT_GET_X(dat) (((dat)[3] << 7) | (dat)[4])
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#define TOUCHKIT_GET_Y(dat) (((dat)[1] << 7) | (dat)[2])
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#define DRIVER_VERSION "v0.1"
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#define DRIVER_AUTHOR "Daniel Ritz <daniel.ritz@gmx.ch>"
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#define DRIVER_DESC "eGalax TouchKit USB HID 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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struct touchkit_usb {
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unsigned char *data;
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dma_addr_t data_dma;
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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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int open;
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char name[128];
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char phys[64];
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};
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static struct usb_device_id touchkit_devices[] = {
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{USB_DEVICE(0x3823, 0x0001)},
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{USB_DEVICE(0x0eef, 0x0001)},
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{}
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};
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static void touchkit_irq(struct urb *urb, struct pt_regs *regs)
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{
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struct touchkit_usb *touchkit = urb->context;
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int retval;
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int x, y;
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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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if (swap_xy) {
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y = TOUCHKIT_GET_X(touchkit->data);
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x = TOUCHKIT_GET_Y(touchkit->data);
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} else {
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x = TOUCHKIT_GET_X(touchkit->data);
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y = TOUCHKIT_GET_Y(touchkit->data);
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}
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input_regs(&touchkit->input, regs);
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input_report_key(&touchkit->input, BTN_TOUCH,
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TOUCHKIT_GET_TOUCHED(touchkit->data));
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input_report_abs(&touchkit->input, ABS_X, x);
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input_report_abs(&touchkit->input, ABS_Y, y);
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input_sync(&touchkit->input);
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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 touchkit_open(struct input_dev *input)
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{
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struct touchkit_usb *touchkit = input->private;
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if (touchkit->open++)
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return 0;
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touchkit->irq->dev = touchkit->udev;
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if (usb_submit_urb(touchkit->irq, GFP_ATOMIC)) {
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touchkit->open--;
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return -EIO;
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}
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return 0;
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}
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static void touchkit_close(struct input_dev *input)
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{
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struct touchkit_usb *touchkit = input->private;
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if (!--touchkit->open)
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usb_kill_urb(touchkit->irq);
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}
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static int touchkit_alloc_buffers(struct usb_device *udev,
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struct touchkit_usb *touchkit)
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{
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touchkit->data = usb_buffer_alloc(udev, TOUCHKIT_REPORT_DATA_SIZE,
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SLAB_ATOMIC, &touchkit->data_dma);
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if (!touchkit->data)
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return -1;
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return 0;
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}
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static void touchkit_free_buffers(struct usb_device *udev,
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struct touchkit_usb *touchkit)
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{
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if (touchkit->data)
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usb_buffer_free(udev, TOUCHKIT_REPORT_DATA_SIZE,
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touchkit->data, touchkit->data_dma);
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}
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static int touchkit_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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int ret;
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struct touchkit_usb *touchkit;
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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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char path[64];
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interface = intf->cur_altsetting;
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endpoint = &interface->endpoint[0].desc;
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touchkit = kmalloc(sizeof(struct touchkit_usb), GFP_KERNEL);
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if (!touchkit)
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return -ENOMEM;
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memset(touchkit, 0, sizeof(struct touchkit_usb));
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touchkit->udev = udev;
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if (touchkit_alloc_buffers(udev, touchkit)) {
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ret = -ENOMEM;
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goto out_free;
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}
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touchkit->input.private = touchkit;
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touchkit->input.open = touchkit_open;
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touchkit->input.close = touchkit_close;
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usb_make_path(udev, path, 64);
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sprintf(touchkit->phys, "%s/input0", path);
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touchkit->input.name = touchkit->name;
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touchkit->input.phys = touchkit->phys;
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touchkit->input.id.bustype = BUS_USB;
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touchkit->input.id.vendor = le16_to_cpu(udev->descriptor.idVendor);
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touchkit->input.id.product = le16_to_cpu(udev->descriptor.idProduct);
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touchkit->input.id.version = le16_to_cpu(udev->descriptor.bcdDevice);
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touchkit->input.dev = &intf->dev;
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touchkit->input.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
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touchkit->input.absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
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touchkit->input.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
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/* Used to Scale Compensated Data */
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touchkit->input.absmin[ABS_X] = TOUCHKIT_MIN_XC;
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touchkit->input.absmax[ABS_X] = TOUCHKIT_MAX_XC;
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touchkit->input.absfuzz[ABS_X] = TOUCHKIT_XC_FUZZ;
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touchkit->input.absflat[ABS_X] = TOUCHKIT_XC_FLAT;
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touchkit->input.absmin[ABS_Y] = TOUCHKIT_MIN_YC;
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touchkit->input.absmax[ABS_Y] = TOUCHKIT_MAX_YC;
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touchkit->input.absfuzz[ABS_Y] = TOUCHKIT_YC_FUZZ;
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touchkit->input.absflat[ABS_Y] = TOUCHKIT_YC_FLAT;
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if (udev->manufacturer)
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strcat(touchkit->name, udev->manufacturer);
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if (udev->product)
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sprintf(touchkit->name, "%s %s", touchkit->name, udev->product);
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if (!strlen(touchkit->name))
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sprintf(touchkit->name, "USB Touchscreen %04x:%04x",
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touchkit->input.id.vendor, touchkit->input.id.product);
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touchkit->irq = usb_alloc_urb(0, GFP_KERNEL);
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if (!touchkit->irq) {
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dbg("%s - usb_alloc_urb failed: touchkit->irq", __FUNCTION__);
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ret = -ENOMEM;
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goto out_free_buffers;
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}
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usb_fill_int_urb(touchkit->irq, touchkit->udev,
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usb_rcvintpipe(touchkit->udev, 0x81),
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touchkit->data, TOUCHKIT_REPORT_DATA_SIZE,
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touchkit_irq, touchkit, endpoint->bInterval);
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input_register_device(&touchkit->input);
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printk(KERN_INFO "input: %s on %s\n", touchkit->name, path);
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usb_set_intfdata(intf, touchkit);
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return 0;
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out_free_buffers:
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touchkit_free_buffers(udev, touchkit);
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out_free:
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kfree(touchkit);
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return ret;
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}
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static void touchkit_disconnect(struct usb_interface *intf)
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{
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struct touchkit_usb *touchkit = usb_get_intfdata(intf);
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dbg("%s - called", __FUNCTION__);
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if (!touchkit)
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return;
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dbg("%s - touchkit is initialized, cleaning up", __FUNCTION__);
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usb_set_intfdata(intf, NULL);
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input_unregister_device(&touchkit->input);
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usb_kill_urb(touchkit->irq);
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usb_free_urb(touchkit->irq);
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touchkit_free_buffers(interface_to_usbdev(intf), touchkit);
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kfree(touchkit);
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}
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MODULE_DEVICE_TABLE(usb, touchkit_devices);
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static struct usb_driver touchkit_driver = {
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.owner = THIS_MODULE,
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.name = "touchkitusb",
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.probe = touchkit_probe,
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.disconnect = touchkit_disconnect,
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.id_table = touchkit_devices,
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};
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static int __init touchkit_init(void)
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{
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return usb_register(&touchkit_driver);
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}
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static void __exit touchkit_cleanup(void)
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{
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usb_deregister(&touchkit_driver);
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}
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module_init(touchkit_init);
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module_exit(touchkit_cleanup);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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