346 lines
10 KiB
C
346 lines
10 KiB
C
/******************************************************************************
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* mtouchusb.c -- Driver for Microtouch (Now 3M) USB Touchscreens
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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 original work by Radoslaw Garbacz (usb-support@ite.pl)
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* (http://freshmeat.net/projects/3mtouchscreendriver)
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*
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* History
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*
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* 0.3 & 0.4 2002 (TEJ) tejohnson@yahoo.com
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* Updated to 2.4.18, then 2.4.19
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* Old version still relied on stealing a minor
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*
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* 0.5 02/26/2004 (TEJ) tejohnson@yahoo.com
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* Complete rewrite using Linux Input in 2.6.3
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* Unfortunately no calibration support at this time
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*
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* 1.4 04/25/2004 (TEJ) tejohnson@yahoo.com
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* Changed reset from standard USB dev reset to vendor reset
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* Changed data sent to host from compensated to raw coordinates
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* Eliminated vendor/product module params
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* Performed multiple successful tests with an EXII-5010UC
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*
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* 1.5 02/27/2005 ddstreet@ieee.org
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* Added module parameter to select raw or hw-calibrated coordinate reporting
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*
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*****************************************************************************/
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#include <linux/config.h>
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#ifdef CONFIG_USB_DEBUG
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#define DEBUG
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#else
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#undef DEBUG
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#endif
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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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#include <linux/usb.h>
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#include <linux/usb_input.h>
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#define MTOUCHUSB_MIN_XC 0x0
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#define MTOUCHUSB_MAX_RAW_XC 0x4000
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#define MTOUCHUSB_MAX_CALIB_XC 0xffff
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#define MTOUCHUSB_XC_FUZZ 0x0
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#define MTOUCHUSB_XC_FLAT 0x0
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#define MTOUCHUSB_MIN_YC 0x0
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#define MTOUCHUSB_MAX_RAW_YC 0x4000
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#define MTOUCHUSB_MAX_CALIB_YC 0xffff
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#define MTOUCHUSB_YC_FUZZ 0x0
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#define MTOUCHUSB_YC_FLAT 0x0
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#define MTOUCHUSB_ASYNC_REPORT 1
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#define MTOUCHUSB_RESET 7
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#define MTOUCHUSB_REPORT_DATA_SIZE 11
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#define MTOUCHUSB_REQ_CTRLLR_ID 10
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#define MTOUCHUSB_GET_RAW_XC(data) (data[8]<<8 | data[7])
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#define MTOUCHUSB_GET_CALIB_XC(data) (data[4]<<8 | data[3])
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#define MTOUCHUSB_GET_RAW_YC(data) (data[10]<<8 | data[9])
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#define MTOUCHUSB_GET_CALIB_YC(data) (data[6]<<8 | data[5])
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#define MTOUCHUSB_GET_XC(data) (raw_coordinates ? \
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MTOUCHUSB_GET_RAW_XC(data) : \
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MTOUCHUSB_GET_CALIB_XC(data))
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#define MTOUCHUSB_GET_YC(data) (raw_coordinates ? \
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MTOUCHUSB_GET_RAW_YC(data) : \
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MTOUCHUSB_GET_CALIB_YC(data))
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#define MTOUCHUSB_GET_TOUCHED(data) ((data[2] & 0x40) ? 1:0)
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#define DRIVER_VERSION "v1.5"
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#define DRIVER_AUTHOR "Todd E. Johnson, tejohnson@yahoo.com"
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#define DRIVER_DESC "3M USB Touchscreen Driver"
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#define DRIVER_LICENSE "GPL"
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static int raw_coordinates = 1;
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module_param(raw_coordinates, bool, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(raw_coordinates, "report raw coordinate values (y, default) or hardware-calibrated coordinate values (n)");
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struct mtouch_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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char name[128];
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char phys[64];
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};
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static struct usb_device_id mtouchusb_devices[] = {
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{ USB_DEVICE(0x0596, 0x0001) },
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{ }
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};
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static void mtouchusb_irq(struct urb *urb, struct pt_regs *regs)
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{
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struct mtouch_usb *mtouch = urb->context;
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int retval;
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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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input_regs(&mtouch->input, regs);
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input_report_key(&mtouch->input, BTN_TOUCH,
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MTOUCHUSB_GET_TOUCHED(mtouch->data));
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input_report_abs(&mtouch->input, ABS_X, MTOUCHUSB_GET_XC(mtouch->data));
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input_report_abs(&mtouch->input, ABS_Y,
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(raw_coordinates ? MTOUCHUSB_MAX_RAW_YC : MTOUCHUSB_MAX_CALIB_YC)
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- MTOUCHUSB_GET_YC(mtouch->data));
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input_sync(&mtouch->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 mtouchusb_open(struct input_dev *input)
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{
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struct mtouch_usb *mtouch = input->private;
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mtouch->irq->dev = mtouch->udev;
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if (usb_submit_urb(mtouch->irq, GFP_ATOMIC))
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return -EIO;
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return 0;
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}
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static void mtouchusb_close(struct input_dev *input)
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{
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struct mtouch_usb *mtouch = input->private;
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usb_kill_urb(mtouch->irq);
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}
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static int mtouchusb_alloc_buffers(struct usb_device *udev, struct mtouch_usb *mtouch)
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{
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dbg("%s - called", __FUNCTION__);
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mtouch->data = usb_buffer_alloc(udev, MTOUCHUSB_REPORT_DATA_SIZE,
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SLAB_ATOMIC, &mtouch->data_dma);
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if (!mtouch->data)
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return -1;
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return 0;
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}
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static void mtouchusb_free_buffers(struct usb_device *udev, struct mtouch_usb *mtouch)
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{
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dbg("%s - called", __FUNCTION__);
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if (mtouch->data)
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usb_buffer_free(udev, MTOUCHUSB_REPORT_DATA_SIZE,
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mtouch->data, mtouch->data_dma);
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}
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static int mtouchusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
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{
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struct mtouch_usb *mtouch;
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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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int nRet;
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dbg("%s - called", __FUNCTION__);
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dbg("%s - setting interface", __FUNCTION__);
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interface = intf->cur_altsetting;
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dbg("%s - setting endpoint", __FUNCTION__);
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endpoint = &interface->endpoint[0].desc;
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if (!(mtouch = kmalloc(sizeof(struct mtouch_usb), GFP_KERNEL))) {
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err("%s - Out of memory.", __FUNCTION__);
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return -ENOMEM;
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}
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memset(mtouch, 0, sizeof(struct mtouch_usb));
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mtouch->udev = udev;
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dbg("%s - allocating buffers", __FUNCTION__);
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if (mtouchusb_alloc_buffers(udev, mtouch)) {
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mtouchusb_free_buffers(udev, mtouch);
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kfree(mtouch);
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return -ENOMEM;
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}
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mtouch->input.private = mtouch;
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mtouch->input.open = mtouchusb_open;
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mtouch->input.close = mtouchusb_close;
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usb_make_path(udev, path, 64);
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sprintf(mtouch->phys, "%s/input0", path);
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mtouch->input.name = mtouch->name;
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mtouch->input.phys = mtouch->phys;
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usb_to_input_id(udev, &mtouch->input.id);
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mtouch->input.dev = &intf->dev;
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mtouch->input.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
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mtouch->input.absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
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mtouch->input.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
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/* Used to Scale Compensated Data and Flip Y */
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mtouch->input.absmin[ABS_X] = MTOUCHUSB_MIN_XC;
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mtouch->input.absmax[ABS_X] = raw_coordinates ?
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MTOUCHUSB_MAX_RAW_XC : MTOUCHUSB_MAX_CALIB_XC;
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mtouch->input.absfuzz[ABS_X] = MTOUCHUSB_XC_FUZZ;
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mtouch->input.absflat[ABS_X] = MTOUCHUSB_XC_FLAT;
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mtouch->input.absmin[ABS_Y] = MTOUCHUSB_MIN_YC;
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mtouch->input.absmax[ABS_Y] = raw_coordinates ?
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MTOUCHUSB_MAX_RAW_YC : MTOUCHUSB_MAX_CALIB_YC;
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mtouch->input.absfuzz[ABS_Y] = MTOUCHUSB_YC_FUZZ;
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mtouch->input.absflat[ABS_Y] = MTOUCHUSB_YC_FLAT;
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if (udev->manufacturer)
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strcat(mtouch->name, udev->manufacturer);
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if (udev->product)
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sprintf(mtouch->name, "%s %s", mtouch->name, udev->product);
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if (!strlen(mtouch->name))
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sprintf(mtouch->name, "USB Touchscreen %04x:%04x",
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mtouch->input.id.vendor, mtouch->input.id.product);
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nRet = usb_control_msg(mtouch->udev, usb_rcvctrlpipe(udev, 0),
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MTOUCHUSB_RESET,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
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dbg("%s - usb_control_msg - MTOUCHUSB_RESET - bytes|err: %d",
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__FUNCTION__, nRet);
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dbg("%s - usb_alloc_urb: mtouch->irq", __FUNCTION__);
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mtouch->irq = usb_alloc_urb(0, GFP_KERNEL);
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if (!mtouch->irq) {
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dbg("%s - usb_alloc_urb failed: mtouch->irq", __FUNCTION__);
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mtouchusb_free_buffers(udev, mtouch);
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kfree(mtouch);
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return -ENOMEM;
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}
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dbg("%s - usb_fill_int_urb", __FUNCTION__);
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usb_fill_int_urb(mtouch->irq, mtouch->udev,
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usb_rcvintpipe(mtouch->udev, 0x81),
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mtouch->data, MTOUCHUSB_REPORT_DATA_SIZE,
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mtouchusb_irq, mtouch, endpoint->bInterval);
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dbg("%s - input_register_device", __FUNCTION__);
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input_register_device(&mtouch->input);
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nRet = usb_control_msg(mtouch->udev, usb_rcvctrlpipe(udev, 0),
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MTOUCHUSB_ASYNC_REPORT,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
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dbg("%s - usb_control_msg - MTOUCHUSB_ASYNC_REPORT - bytes|err: %d",
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__FUNCTION__, nRet);
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printk(KERN_INFO "input: %s on %s\n", mtouch->name, path);
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usb_set_intfdata(intf, mtouch);
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return 0;
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}
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static void mtouchusb_disconnect(struct usb_interface *intf)
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{
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struct mtouch_usb *mtouch = usb_get_intfdata(intf);
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dbg("%s - called", __FUNCTION__);
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usb_set_intfdata(intf, NULL);
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if (mtouch) {
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dbg("%s - mtouch is initialized, cleaning up", __FUNCTION__);
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usb_kill_urb(mtouch->irq);
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input_unregister_device(&mtouch->input);
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usb_free_urb(mtouch->irq);
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mtouchusb_free_buffers(interface_to_usbdev(intf), mtouch);
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kfree(mtouch);
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}
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}
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MODULE_DEVICE_TABLE(usb, mtouchusb_devices);
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static struct usb_driver mtouchusb_driver = {
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.owner = THIS_MODULE,
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.name = "mtouchusb",
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.probe = mtouchusb_probe,
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.disconnect = mtouchusb_disconnect,
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.id_table = mtouchusb_devices,
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};
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static int __init mtouchusb_init(void)
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{
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dbg("%s - called", __FUNCTION__);
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return usb_register(&mtouchusb_driver);
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}
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static void __exit mtouchusb_cleanup(void)
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{
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dbg("%s - called", __FUNCTION__);
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usb_deregister(&mtouchusb_driver);
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}
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module_init(mtouchusb_init);
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module_exit(mtouchusb_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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