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Sourcecode: wacom-tools version File versions

wacom_sys.c

/*
 * drivers/usb/input/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"

/* defines to get HID report descriptor */
#define HID_DEVICET_HID       (USB_TYPE_CLASS | 0x01)
#define HID_DEVICET_REPORT    (USB_TYPE_CLASS | 0x02)
#define HID_USAGE_UNDEFINED         0x00
#define HID_USAGE_PAGE              0x05
#define HID_USAGE_PAGE_DIGITIZER    0x0d
#define HID_USAGE_PAGE_DESKTOP            0x01
#define HID_USAGE             0x09
#define HID_USAGE_X                 0x30
#define HID_USAGE_Y                 0x31
#define HID_USAGE_X_TILT            0x3d
#define HID_USAGE_Y_TILT            0x3e
#define HID_USAGE_FINGER            0x22
#define HID_USAGE_STYLUS            0x20
#define HID_COLLECTION              0xc0
#define HID_USAGE_PAGE_VDEFINED           0xff

enum {
      WCM_UNDEFINED = 0,
      WCM_DESKTOP,
      WCM_DIGITIZER,
      MAX_USAGE_PAGE
};

struct hid_descriptor
{
      struct usb_descriptor_header header;
      __le16   bcdHID;
      u8       bCountryCode;
      u8       bNumDescriptors;
      u8       bDescriptorType;
      __le16   wDescriptorLength;
} __attribute__ ((packed));

/* defines to get/set USB message */
#define USB_REQ_GET_REPORT    0x01
#define USB_REQ_SET_REPORT    0x09
#define WAC_HID_FEATURE_REPORT      0x03

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 pt_regs *regs)
{
      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;
      wcombo.regs = regs;
      
      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_regs(void *wcombo)
{
      input_regs(get_input_dev((struct wacom_combo *)wcombo), ((struct wacom_combo *)wcombo)->regs);
      return;
}

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 = dev->private;

      if (wacom->open++)
            return 0;

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

      return 0;
}

static void wacom_close(struct input_dev *dev)
{
      struct wacom *wacom = dev->private;

      if (!--wacom->open)
            usb_kill_urb(wacom->irq);
}

void input_dev_mo(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
      input_dev->keybit[LONG(BTN_MISC)] |= BIT(BTN_1) | BIT(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(EV_MSC);
      input_dev->mscbit[0] |= BIT(MSC_SERIAL);
      input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_FINGER);
      input_dev->keybit[LONG(BTN_MISC)] |= BIT(BTN_0) | BIT(BTN_4);
}

void input_dev_g(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
      input_dev->evbit[0] |= BIT(EV_REL);
      input_dev->relbit[0] |= BIT(REL_WHEEL);
      input_dev->keybit[LONG(BTN_MOUSE)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
      input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_RUBBER) | BIT(BTN_TOOL_MOUSE) | BIT(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[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_FINGER);
      input_dev->keybit[LONG(BTN_MISC)] |= BIT(BTN_0) | BIT(BTN_1) | BIT(BTN_2) | BIT(BTN_3);
      input_set_abs_params(input_dev, ABS_RX, 0, 4096, 0, 0);
      input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0);
}

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

void input_dev_bee(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
      input_dev->keybit[LONG(BTN_MISC)] |= BIT(BTN_8) | BIT(BTN_9);
}

void input_dev_i(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
{
      input_dev->evbit[0] |= BIT(EV_MSC) | BIT(EV_REL);
      input_dev->mscbit[0] |= BIT(MSC_SERIAL);
      input_dev->relbit[0] |= BIT(REL_WHEEL);
      input_dev->keybit[LONG(BTN_MOUSE)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE) | BIT(BTN_SIDE) | BIT(BTN_EXTRA);
      input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_RUBBER) | BIT(BTN_TOOL_MOUSE)     | BIT(BTN_TOOL_BRUSH)
            | BIT(BTN_TOOL_PENCIL) | BIT(BTN_TOOL_AIRBRUSH) | BIT(BTN_TOOL_LENS) | BIT(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[LONG(BTN_DIGI)] |= BIT(BTN_STYLUS2);
}

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

static void wacom_paser_hid(struct usb_interface *intf, struct hid_descriptor *hid_desc, 
            struct wacom_wac *wacom_wac, char *report)
{
      struct usb_device *dev = interface_to_usbdev(intf);
      char limit = 0, result = 0;
      int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;

      /* retrive report descriptors */
      do {
            result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
                  USB_REQ_GET_DESCRIPTOR,
                  USB_RECIP_INTERFACE | USB_DIR_IN,
                  HID_DEVICET_REPORT << 8,
                  intf->altsetting[0].desc.bInterfaceNumber, /* interface */
                  report,
                  hid_desc->wDescriptorLength,
                  5000); /* 5 secs */
      } while (limit++ < 5);

      for (i=0; i<hid_desc->wDescriptorLength; i++) {
            if ((unsigned short)report[i] == HID_USAGE_PAGE) {
                  switch ((unsigned short)report[i+1]) {
                      case HID_USAGE_PAGE_DIGITIZER:
                        usage = WCM_DIGITIZER;
                        i++;
                        continue;
                      case HID_USAGE_PAGE_DESKTOP:
                        usage = WCM_DESKTOP;
                        i++;
                        continue;
                  }
            }

            if ((unsigned short)report[i] == HID_USAGE) {
                  switch ((unsigned short)report[i+1]) {
                      case HID_USAGE_X:
                        if (usage == WCM_DESKTOP) {
                              if (finger) {
                                    wacom_wac->features->touch_x_max = 
                                    wacom_wac->features->touch_y_max = (unsigned short)
                                          (wacom_le16_to_cpu(&report[i+3]));
                                    wacom_wac->features->x_max = (unsigned short)
                                          (wacom_le16_to_cpu(&report[i+6]));
                                    i += 7;
                              } else if (pen) {
                                    wacom_wac->features->x_max = (unsigned short)
                                          (wacom_le16_to_cpu(&report[i+3]));
                                    i += 4;
                              }
                        } else if (usage == WCM_DIGITIZER) {
                              /* max pressure isn't reported 
                              wacom_wac->features->pressure_max = (unsigned short)
                                          (report[i+4] << 8  | report[i+3]);
                              */
                              wacom_wac->features->pressure_max = 255;
                              i += 4;
                        }
                        break;
                      case HID_USAGE_Y:
                        if (usage == WCM_DESKTOP) {
                              wacom_wac->features->y_max = (unsigned short)
                                    (wacom_le16_to_cpu(&report[i+3]));
                        }
                        i += 4;
                        break;
                      case HID_USAGE_FINGER:
                        finger = 1;
                        i++;
                        break;
                      case HID_USAGE_STYLUS:
                        pen = 1;
                        i++;
                        break;
                      case HID_USAGE_UNDEFINED:
                        if (usage == WCM_DESKTOP && finger) { /* capacity */
                              wacom_wac->features->pressure_max = (unsigned short)
                                    (wacom_le16_to_cpu(&report[i+3]));
                        }
                        i += 4;
                        break;
                  }
            }

            if ((unsigned short)report[i] == HID_COLLECTION) {
                  /* reset UsagePage ans Finger */
                  finger = usage = 0;
            }
      }
}

static int wacom_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 wacom *wacom;
      struct wacom_wac *wacom_wac;
      char rep_data[2], limit = 0, mode = 2, *report = NULL;
      struct hid_descriptor *hid_desc;
        char path[64];

      if (!(wacom = kmalloc(sizeof(struct wacom), GFP_KERNEL)))
            return -ENOMEM;
      memset(wacom, 0, sizeof(struct wacom));

      if (!(wacom_wac = kmalloc(sizeof(struct wacom_wac), GFP_KERNEL))) {
            kfree(wacom);
            return -ENOMEM;
      }
      memset(wacom_wac, 0, sizeof(struct wacom_wac));

      wacom_wac->data = usb_buffer_alloc(dev, 10, GFP_KERNEL, &wacom->data_dma);
      if (!wacom_wac->data) {
            kfree(wacom);
            kfree(wacom_wac);
            return -ENOMEM;
      }

      wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
      if (!wacom->irq) {
            usb_buffer_free(dev, 10, wacom_wac->data, wacom->data_dma);
            kfree(wacom);
            kfree(wacom_wac);
            return -ENOMEM;
      }

      wacom->usbdev = dev;
      usb_make_path(dev, path, 64);
      sprintf(wacom->phys, "%s/input0", path);

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

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

      /* TabletPC need to retrieve the physical and logical maximum from report descriptor */
      if (wacom_wac->features->type == TABLETPC) {
            if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
                  if (usb_get_extra_descriptor(&interface->endpoint[0], 
                        HID_DEVICET_REPORT, &hid_desc)) {
                        printk("wacom: can not retrive extra class descriptor\n");
                        usb_buffer_free(dev, 10, wacom_wac->data, wacom->data_dma);
                        kfree(wacom);
                        kfree(wacom_wac);
                        return -ENOMEM;
                  }
            }
            report = kmalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
            if (!report) {
                  usb_buffer_free(dev, 10, wacom_wac->data, wacom->data_dma);
                  kfree(wacom);
                  kfree(wacom_wac);
                  return -ENOMEM;
            }
            wacom_paser_hid(intf, hid_desc, wacom_wac, report);
      }

      wacom->dev.name = wacom_wac->features->name;
      wacom->wacom_wac = wacom_wac;
        wacom->dev.phys = wacom->phys;
        wacom->dev.id.bustype = BUS_USB;
        wacom->dev.id.vendor = le16_to_cpu(dev->descriptor.idVendor);
        wacom->dev.id.product = le16_to_cpu(dev->descriptor.idProduct);
        wacom->dev.id.version = le16_to_cpu(dev->descriptor.bcdDevice);
      wacom->dev.dev = &intf->dev;
      wacom->dev.private = wacom;
      wacom->dev.open = wacom_open;
      wacom->dev.close = wacom_close;

      wacom->dev.evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS);
      wacom->dev.keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_STYLUS) | BIT(BTN_TOUCH);
      input_set_abs_params(&wacom->dev, ABS_X, 0, wacom_wac->features->x_max, 4, 0);
      input_set_abs_params(&wacom->dev, ABS_Y, 0, wacom_wac->features->y_max, 4, 0);
      input_set_abs_params(&wacom->dev, ABS_PRESSURE, 0, wacom_wac->features->pressure_max, 0, 0);
      if (wacom_wac->features->type == TABLETPC) {
            wacom->dev.keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_DOUBLETAP);
            input_set_abs_params(&wacom->dev, ABS_RX, 0, wacom_wac->features->touch_x_max, 4, 0);
            input_set_abs_params(&wacom->dev, ABS_RY, 0, wacom_wac->features->touch_y_max, 4, 0);
      }
      wacom->dev.absbit[LONG(ABS_MISC)] |= BIT(ABS_MISC);

      wacom_init_input_dev(&wacom->dev, wacom_wac);

      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;

      input_register_device(&wacom->dev);

      /* Ask the tablet to report tablet data if it is not a Tablet PC. 
       * Repeat until it succeeds 
       */
      if (wacom_wac->features->type != TABLETPC) {
            do {
                  rep_data[0] = 2;
                  rep_data[1] = mode;
                  usb_set_report(intf, WAC_HID_FEATURE_REPORT, 2, rep_data, 2);
                  usb_get_report(intf, WAC_HID_FEATURE_REPORT, 2, rep_data, 2);
            } while (rep_data[1] != mode && limit++ < 5);
      }

      usb_set_intfdata(intf, wacom);
      kfree(report);
      return 0;
}

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 = {
      .owner =    THIS_MODULE,
      .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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