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wacom_sys.c

/*
 * drivers/input/tablet/wacom_sys.c
 *
 *  USB Wacom Graphire and Wacom Intuos tablet support - system specific code
 */

/*
 * 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.
 */

#include "wacom.h"
#include "wacom_wac.h"

#define USB_REQ_GET_REPORT    0x01
#define USB_REQ_SET_REPORT    0x09

static int usb_get_report(struct usb_interface *intf, unsigned char type,
                        unsigned char id, void *buf, int size)
{
      return usb_control_msg(interface_to_usbdev(intf),
            usb_rcvctrlpipe(interface_to_usbdev(intf), 0),
            USB_REQ_GET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
            (type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber,
            buf, size, 100);
}

static int usb_set_report(struct usb_interface *intf, unsigned char type,
                        unsigned char id, void *buf, int size)
{
      return usb_control_msg(interface_to_usbdev(intf),
            usb_sndctrlpipe(interface_to_usbdev(intf), 0),
                USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
                (type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber,
            buf, size, 1000);
}

static struct input_dev * get_input_dev(struct wacom_combo *wcombo)
{
      return wcombo->wacom->dev;
}

static void wacom_sys_irq(struct urb *urb)
{
      struct wacom *wacom = urb->context;
      struct wacom_combo wcombo;
      int retval;

      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 exit;
      }

      wcombo.wacom = wacom;
      wcombo.urb = urb;

      if (wacom_wac_irq(wacom->wacom_wac, (void *)&wcombo))
            input_sync(get_input_dev(&wcombo));

 exit:
      retval = usb_submit_urb (urb, GFP_ATOMIC);
      if (retval)
            err ("%s - usb_submit_urb failed with result %d",
                 __FUNCTION__, retval);
}

void wacom_report_key(void *wcombo, unsigned int key_type, int key_data)
{
      input_report_key(get_input_dev((struct wacom_combo *)wcombo), key_type, key_data);
      return;
}

void wacom_report_abs(void *wcombo, unsigned int abs_type, int abs_data)
{
      input_report_abs(get_input_dev((struct wacom_combo *)wcombo), abs_type, abs_data);
      return;
}

void wacom_report_rel(void *wcombo, unsigned int rel_type, int rel_data)
{
      input_report_rel(get_input_dev((struct wacom_combo *)wcombo), rel_type, rel_data);
      return;
}

void wacom_input_event(void *wcombo, unsigned int type, unsigned int code, int value)
{
      input_event(get_input_dev((struct wacom_combo *)wcombo), type, code, value);
      return;
}

__u16 wacom_be16_to_cpu(unsigned char *data)
{
      __u16 value;
      value = be16_to_cpu(*(__be16 *) data);
      return value;
}

__u16 wacom_le16_to_cpu(unsigned char *data)
{
      __u16 value;
      value = le16_to_cpu(*(__le16 *) data);
      return value;
}

void wacom_input_sync(void *wcombo)
{
      input_sync(get_input_dev((struct wacom_combo *)wcombo));
      return;
}

static int wacom_open(struct input_dev *dev)
{
      struct wacom *wacom = input_get_drvdata(dev);

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

      return 0;
}

static void wacom_close(struct input_dev *dev)
{
      struct wacom *wacom = input_get_drvdata(dev);

      usb_kill_urb(wacom->irq);
}

void input_dev_mo(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
      input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_1) |
            BIT_MASK(BTN_5);
      input_set_abs_params(input_dev, ABS_WHEEL, 0, 71, 0, 0);
}

void input_dev_g4(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
      input_dev->evbit[0] |= BIT_MASK(EV_MSC);
      input_dev->mscbit[0] |= BIT_MASK(MSC_SERIAL);
      input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_FINGER);
      input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_0) |
            BIT_MASK(BTN_4);
}

void input_dev_g(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
      input_dev->evbit[0] |= BIT_MASK(EV_REL);
      input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
      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_RUBBER) |
            BIT_MASK(BTN_TOOL_MOUSE) | BIT_MASK(BTN_STYLUS2);
      input_set_abs_params(input_dev, ABS_DISTANCE, 0, wacom_wac->features->distance_max, 0, 0);
}

void input_dev_i3s(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
      input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_FINGER);
      input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_0) |
            BIT_MASK(BTN_1) | BIT_MASK(BTN_2) | BIT_MASK(BTN_3);
      input_set_abs_params(input_dev, ABS_RX, 0, 4096, 0, 0);
}

void input_dev_i3(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
      input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_4) |
            BIT_MASK(BTN_5) | BIT_MASK(BTN_6) | BIT_MASK(BTN_7);
      input_set_abs_params(input_dev, ABS_RY, 0, 4096, 0, 0);
}

void input_dev_i(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
      input_dev->evbit[0] |= BIT_MASK(EV_MSC) | BIT_MASK(EV_REL);
      input_dev->mscbit[0] |= BIT_MASK(MSC_SERIAL);
      input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
      input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_LEFT) |
            BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE) |
            BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
      input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER) |
            BIT_MASK(BTN_TOOL_MOUSE) | BIT_MASK(BTN_TOOL_BRUSH) |
            BIT_MASK(BTN_TOOL_PENCIL) | BIT_MASK(BTN_TOOL_AIRBRUSH) |
            BIT_MASK(BTN_TOOL_LENS) | BIT_MASK(BTN_STYLUS2);
      input_set_abs_params(input_dev, ABS_DISTANCE, 0, wacom_wac->features->distance_max, 0, 0);
      input_set_abs_params(input_dev, ABS_WHEEL, 0, 1023, 0, 0);
      input_set_abs_params(input_dev, ABS_TILT_X, 0, 127, 0, 0);
      input_set_abs_params(input_dev, ABS_TILT_Y, 0, 127, 0, 0);
      input_set_abs_params(input_dev, ABS_RZ, -900, 899, 0, 0);
      input_set_abs_params(input_dev, ABS_THROTTLE, -1023, 1023, 0, 0);
}

void input_dev_pl(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
      input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_STYLUS2) |
            BIT_MASK(BTN_TOOL_RUBBER);
}

void input_dev_pt(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
      input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER);
}

static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
      struct usb_device *dev = interface_to_usbdev(intf);
      struct usb_endpoint_descriptor *endpoint;
      struct wacom *wacom;
      struct wacom_wac *wacom_wac;
      struct input_dev *input_dev;
      int error = -ENOMEM;
      char rep_data[2], limit = 0;

      wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
      wacom_wac = kzalloc(sizeof(struct wacom_wac), GFP_KERNEL);
      input_dev = input_allocate_device();
      if (!wacom || !input_dev || !wacom_wac)
            goto fail1;

      wacom_wac->data = usb_buffer_alloc(dev, 10, GFP_KERNEL, &wacom->data_dma);
      if (!wacom_wac->data)
            goto fail1;

      wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
      if (!wacom->irq)
            goto fail2;

      wacom->usbdev = dev;
      wacom->dev = input_dev;
      usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
      strlcat(wacom->phys, "/input0", sizeof(wacom->phys));

      wacom_wac->features = get_wacom_feature(id);
      BUG_ON(wacom_wac->features->pktlen > 10);

      input_dev->name = wacom_wac->features->name;
      wacom->wacom_wac = wacom_wac;
      usb_to_input_id(dev, &input_dev->id);

      input_dev->dev.parent = &intf->dev;

      input_set_drvdata(input_dev, wacom);

      input_dev->open = wacom_open;
      input_dev->close = wacom_close;

      input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
      input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_PEN) |
            BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS);
      input_set_abs_params(input_dev, ABS_X, 0, wacom_wac->features->x_max, 4, 0);
      input_set_abs_params(input_dev, ABS_Y, 0, wacom_wac->features->y_max, 4, 0);
      input_set_abs_params(input_dev, ABS_PRESSURE, 0, wacom_wac->features->pressure_max, 0, 0);
      input_dev->absbit[BIT_WORD(ABS_MISC)] |= BIT_MASK(ABS_MISC);

      wacom_init_input_dev(input_dev, wacom_wac);

      endpoint = &intf->cur_altsetting->endpoint[0].desc;

      usb_fill_int_urb(wacom->irq, dev,
                   usb_rcvintpipe(dev, endpoint->bEndpointAddress),
                   wacom_wac->data, wacom_wac->features->pktlen,
                   wacom_sys_irq, wacom, endpoint->bInterval);
      wacom->irq->transfer_dma = wacom->data_dma;
      wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

      error = input_register_device(wacom->dev);
      if (error)
            goto fail3;

      /* Ask the tablet to report tablet data. Repeat until it succeeds */
      do {
            rep_data[0] = 2;
            rep_data[1] = 2;
            usb_set_report(intf, 3, 2, rep_data, 2);
            usb_get_report(intf, 3, 2, rep_data, 2);
      } while (rep_data[1] != 2 && limit++ < 5);

      usb_set_intfdata(intf, wacom);
      return 0;

 fail3:     usb_free_urb(wacom->irq);
 fail2:     usb_buffer_free(dev, 10, wacom_wac->data, wacom->data_dma);
 fail1:     input_free_device(input_dev);
      kfree(wacom);
      kfree(wacom_wac);
      return error;
}

static void wacom_disconnect(struct usb_interface *intf)
{
      struct wacom *wacom = usb_get_intfdata (intf);

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

static struct usb_driver wacom_driver = {
      .name =           "wacom",
      .probe =    wacom_probe,
      .disconnect =     wacom_disconnect,
};

static int __init wacom_init(void)
{
      int result;
      wacom_driver.id_table = get_device_table();
      result = usb_register(&wacom_driver);
      if (result == 0)
            info(DRIVER_VERSION ":" DRIVER_DESC);
      return result;
}

static void __exit wacom_exit(void)
{
      usb_deregister(&wacom_driver);
}

module_init(wacom_init);
module_exit(wacom_exit);

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