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acecad.c

/*
 *  Copyright (c) 2001-2005 Edouard TISSERANT   <edouard.tisserant@wanadoo.fr>
 *  Copyright (c) 2004-2005 Stephane VOLTZ      <svoltz@numericable.fr>
 *
 *  USB Acecad "Acecad Flair" tablet support
 *
 *  Changelog:
 *      v3.2 - Added sysfs support
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/usb/input.h>

/*
 * Version Information
 */
#define DRIVER_VERSION "v3.2"
#define DRIVER_DESC    "USB Acecad Flair tablet driver"
#define DRIVER_LICENSE "GPL"
#define DRIVER_AUTHOR  "Edouard TISSERANT <edouard.tisserant@wanadoo.fr>"

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE(DRIVER_LICENSE);

#define USB_VENDOR_ID_ACECAD  0x0460
#define USB_DEVICE_ID_FLAIR   0x0004
#define USB_DEVICE_ID_302     0x0008

struct usb_acecad {
      char name[128];
      char phys[64];
      struct usb_device *usbdev;
      struct input_dev *input;
      struct urb *irq;

      unsigned char *data;
      dma_addr_t data_dma;
};

static void usb_acecad_irq(struct urb *urb)
{
      struct usb_acecad *acecad = urb->context;
      unsigned char *data = acecad->data;
      struct input_dev *dev = acecad->input;
      int prox, status;

      switch (urb->status) {
            case 0:
                  /* success */
                  break;
            case -ECONNRESET:
            case -ENOENT:
            case -ESHUTDOWN:
                  /* this urb is terminated, clean up */
                  dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
                  return;
            default:
                  dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
                  goto resubmit;
      }

      prox = (data[0] & 0x04) >> 2;
      input_report_key(dev, BTN_TOOL_PEN, prox);

      if (prox) {
            int x = data[1] | (data[2] << 8);
            int y = data[3] | (data[4] << 8);
            /* Pressure should compute the same way for flair and 302 */
            int pressure = data[5] | (data[6] << 8);
            int touch = data[0] & 0x01;
            int stylus = (data[0] & 0x10) >> 4;
            int stylus2 = (data[0] & 0x20) >> 5;
            input_report_abs(dev, ABS_X, x);
            input_report_abs(dev, ABS_Y, y);
            input_report_abs(dev, ABS_PRESSURE, pressure);
            input_report_key(dev, BTN_TOUCH, touch);
            input_report_key(dev, BTN_STYLUS, stylus);
            input_report_key(dev, BTN_STYLUS2, stylus2);
      }

      /* event termination */
      input_sync(dev);

resubmit:
      status = usb_submit_urb(urb, GFP_ATOMIC);
      if (status)
            err("can't resubmit intr, %s-%s/input0, status %d",
                  acecad->usbdev->bus->bus_name, acecad->usbdev->devpath, status);
}

static int usb_acecad_open(struct input_dev *dev)
{
      struct usb_acecad *acecad = input_get_drvdata(dev);

      acecad->irq->dev = acecad->usbdev;
      if (usb_submit_urb(acecad->irq, GFP_KERNEL))
            return -EIO;

      return 0;
}

static void usb_acecad_close(struct input_dev *dev)
{
      struct usb_acecad *acecad = input_get_drvdata(dev);

      usb_kill_urb(acecad->irq);
}

static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
      struct usb_device *dev = interface_to_usbdev(intf);
      struct usb_host_interface *interface = intf->cur_altsetting;
      struct usb_endpoint_descriptor *endpoint;
      struct usb_acecad *acecad;
      struct input_dev *input_dev;
      int pipe, maxp;
      int err = -ENOMEM;

      if (interface->desc.bNumEndpoints != 1)
            return -ENODEV;

      endpoint = &interface->endpoint[0].desc;

      if (!usb_endpoint_is_int_in(endpoint))
            return -ENODEV;

      pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
      maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));

      acecad = kzalloc(sizeof(struct usb_acecad), GFP_KERNEL);
      input_dev = input_allocate_device();
      if (!acecad || !input_dev) {
            err = -ENOMEM;
            goto fail1;
      }

      acecad->data = usb_buffer_alloc(dev, 8, GFP_KERNEL, &acecad->data_dma);
      if (!acecad->data) {
            err= -ENOMEM;
            goto fail1;
      }

      acecad->irq = usb_alloc_urb(0, GFP_KERNEL);
      if (!acecad->irq) {
            err = -ENOMEM;
            goto fail2;
      }

      acecad->usbdev = dev;
      acecad->input = input_dev;

      if (dev->manufacturer)
            strlcpy(acecad->name, dev->manufacturer, sizeof(acecad->name));

      if (dev->product) {
            if (dev->manufacturer)
                  strlcat(acecad->name, " ", sizeof(acecad->name));
            strlcat(acecad->name, dev->product, sizeof(acecad->name));
      }

      usb_make_path(dev, acecad->phys, sizeof(acecad->phys));
      strlcat(acecad->phys, "/input0", sizeof(acecad->phys));

      input_dev->name = acecad->name;
      input_dev->phys = acecad->phys;
      usb_to_input_id(dev, &input_dev->id);
      input_dev->dev.parent = &intf->dev;

      input_set_drvdata(input_dev, acecad);

      input_dev->open = usb_acecad_open;
      input_dev->close = usb_acecad_close;

      input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
      input_dev->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
            BIT_MASK(ABS_PRESSURE);
      input_dev->keybit[BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) |
            BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
      input_dev->keybit[BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_TOOL_PEN) |
            BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS) |
            BIT_MASK(BTN_STYLUS2);

      switch (id->driver_info) {
            case 0:
                  input_dev->absmax[ABS_X] = 5000;
                  input_dev->absmax[ABS_Y] = 3750;
                  input_dev->absmax[ABS_PRESSURE] = 512;
                  if (!strlen(acecad->name))
                        snprintf(acecad->name, sizeof(acecad->name),
                              "USB Acecad Flair Tablet %04x:%04x",
                              le16_to_cpu(dev->descriptor.idVendor),
                              le16_to_cpu(dev->descriptor.idProduct));
                  break;
            case 1:
                  input_dev->absmax[ABS_X] = 3000;
                  input_dev->absmax[ABS_Y] = 2250;
                  input_dev->absmax[ABS_PRESSURE] = 1024;
                  if (!strlen(acecad->name))
                        snprintf(acecad->name, sizeof(acecad->name),
                              "USB Acecad 302 Tablet %04x:%04x",
                              le16_to_cpu(dev->descriptor.idVendor),
                              le16_to_cpu(dev->descriptor.idProduct));
                  break;
      }

      input_dev->absfuzz[ABS_X] = 4;
      input_dev->absfuzz[ABS_Y] = 4;

      usb_fill_int_urb(acecad->irq, dev, pipe,
                  acecad->data, maxp > 8 ? 8 : maxp,
                  usb_acecad_irq, acecad, endpoint->bInterval);
      acecad->irq->transfer_dma = acecad->data_dma;
      acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

      err = input_register_device(acecad->input);
      if (err)
            goto fail2;

      usb_set_intfdata(intf, acecad);

      return 0;

 fail2:     usb_buffer_free(dev, 8, acecad->data, acecad->data_dma);
 fail1: input_free_device(input_dev);
      kfree(acecad);
      return err;
}

static void usb_acecad_disconnect(struct usb_interface *intf)
{
      struct usb_acecad *acecad = usb_get_intfdata(intf);

      usb_set_intfdata(intf, NULL);
      if (acecad) {
            usb_kill_urb(acecad->irq);
            input_unregister_device(acecad->input);
            usb_free_urb(acecad->irq);
            usb_buffer_free(interface_to_usbdev(intf), 10, acecad->data, acecad->data_dma);
            kfree(acecad);
      }
}

static struct usb_device_id usb_acecad_id_table [] = {
      { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 },
      { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302),       .driver_info = 1 },
      { }
};

MODULE_DEVICE_TABLE(usb, usb_acecad_id_table);

static struct usb_driver usb_acecad_driver = {
      .name =           "usb_acecad",
      .probe =    usb_acecad_probe,
      .disconnect =     usb_acecad_disconnect,
      .id_table = usb_acecad_id_table,
};

static int __init usb_acecad_init(void)
{
      int result = usb_register(&usb_acecad_driver);
      if (result == 0)
            info(DRIVER_VERSION ":" DRIVER_DESC);
      return result;
}

static void __exit usb_acecad_exit(void)
{
      usb_deregister(&usb_acecad_driver);
}

module_init(usb_acecad_init);
module_exit(usb_acecad_exit);

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