[net-next-2.6.git] / drivers / input / tablet / wacom_sys.c

/*
 * drivers/input/tablet/wacom_sys.c
 *
 *  USB Wacom 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_wac.h"
#include "wacom.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

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

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 void wacom_sys_irq(struct urb *urb)
{
	struct wacom *wacom = urb->context;
	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", __func__, urb->status);
		return;
	default:
		dbg("%s - nonzero urb status received: %d", __func__, urb->status);
		goto exit;
	}

	wacom_wac_irq(&wacom->wacom_wac, urb->actual_length);

 exit:
	usb_mark_last_busy(wacom->usbdev);
	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
		err ("%s - usb_submit_urb failed with result %d",
		     __func__, retval);
}

__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;
}

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

	mutex_lock(&wacom->lock);

	wacom->irq->dev = wacom->usbdev;

	if (usb_autopm_get_interface(wacom->intf) < 0) {
		mutex_unlock(&wacom->lock);
		return -EIO;
	}

	if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
		usb_autopm_put_interface(wacom->intf);
		mutex_unlock(&wacom->lock);
		return -EIO;
	}

	wacom->open = true;
	wacom->intf->needs_remote_wakeup = 1;

	mutex_unlock(&wacom->lock);
	return 0;
}

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

	mutex_lock(&wacom->lock);
	usb_kill_urb(wacom->irq);
	wacom->open = false;
	wacom->intf->needs_remote_wakeup = 0;
	mutex_unlock(&wacom->lock);
}

static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hid_desc,
			   struct wacom_features *features)
{
	struct usb_device *dev = interface_to_usbdev(intf);
	char limit = 0;
	/* result has to be defined as int for some devices */
	int result = 0;
	int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
	unsigned char *report;

	report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
	if (!report)
		return -ENOMEM;

	/* 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 (result < 0 && limit++ < 5);

	/* No need to parse the Descriptor. It isn't an error though */
	if (result < 0)
		goto out;

	for (i = 0; i < hid_desc->wDescriptorLength; i++) {

		switch (report[i]) {
		case HID_USAGE_PAGE:
			switch (report[i + 1]) {
			case HID_USAGE_PAGE_DIGITIZER:
				usage = WCM_DIGITIZER;
				i++;
				break;

			case HID_USAGE_PAGE_DESKTOP:
				usage = WCM_DESKTOP;
				i++;
				break;
			}
			break;

		case HID_USAGE:
			switch (report[i + 1]) {
			case HID_USAGE_X:
				if (usage == WCM_DESKTOP) {
					if (finger) {
						features->device_type = BTN_TOOL_DOUBLETAP;
						if (features->type == TABLETPC2FG) {
							/* need to reset back */
							features->pktlen = WACOM_PKGLEN_TPC2FG;
							features->device_type = BTN_TOOL_TRIPLETAP;
						}
						features->x_max =
							wacom_le16_to_cpu(&report[i + 3]);
						features->x_phy =
							wacom_le16_to_cpu(&report[i + 6]);
						features->unit = report[i + 9];
						features->unitExpo = report[i + 11];
						i += 12;
					} else if (pen) {
						/* penabled only accepts exact bytes of data */
						if (features->type == TABLETPC2FG)
							features->pktlen = WACOM_PKGLEN_GRAPHIRE;
						features->device_type = BTN_TOOL_PEN;
						features->x_max =
							wacom_le16_to_cpu(&report[i + 3]);
						i += 4;
					}
				} else if (usage == WCM_DIGITIZER) {
					/* max pressure isn't reported
					features->pressure_max = (unsigned short)
							(report[i+4] << 8  | report[i + 3]);
					*/
					features->pressure_max = 255;
					i += 4;
				}
				break;

			case HID_USAGE_Y:
				if (usage == WCM_DESKTOP) {
					if (finger) {
						features->device_type = BTN_TOOL_DOUBLETAP;
						if (features->type == TABLETPC2FG) {
							/* need to reset back */
							features->pktlen = WACOM_PKGLEN_TPC2FG;
							features->device_type = BTN_TOOL_TRIPLETAP;
							features->y_max =
								wacom_le16_to_cpu(&report[i + 3]);
							features->y_phy =
								wacom_le16_to_cpu(&report[i + 6]);
							i += 7;
						} else {
							features->y_max =
								features->x_max;
							features->y_phy =
								wacom_le16_to_cpu(&report[i + 3]);
							i += 4;
						}
					} else if (pen) {
						/* penabled only accepts exact bytes of data */
						if (features->type == TABLETPC2FG)
							features->pktlen = WACOM_PKGLEN_GRAPHIRE;
						features->device_type = BTN_TOOL_PEN;
						features->y_max =
							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 */
					features->pressure_max =
						wacom_le16_to_cpu(&report[i + 3]);
				i += 4;
				break;
			}
			break;

		case HID_COLLECTION:
			/* reset UsagePage and Finger */
			finger = usage = 0;
			break;
		}
	}

 out:
	result = 0;
	kfree(report);
	return result;
}

static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
{
	unsigned char *rep_data;
	int limit = 0, report_id = 2;
	int error = -ENOMEM;

	rep_data = kmalloc(2, GFP_KERNEL);
	if (!rep_data)
		return error;

	/* ask to report tablet data if it is 2FGT or not a Tablet PC */
	if (features->device_type == BTN_TOOL_TRIPLETAP) {
		do {
			rep_data[0] = 3;
			rep_data[1] = 4;
			report_id = 3;
			error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
				report_id, rep_data, 2);
			if (error >= 0)
				error = usb_get_report(intf,
					WAC_HID_FEATURE_REPORT, report_id,
					rep_data, 3);
		} while ((error < 0 || rep_data[1] != 4) && limit++ < 5);
	} else if (features->type != TABLETPC && features->type != TABLETPC2FG) {
		do {
			rep_data[0] = 2;
			rep_data[1] = 2;
			error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
				report_id, rep_data, 2);
			if (error >= 0)
				error = usb_get_report(intf,
					WAC_HID_FEATURE_REPORT, report_id,
					rep_data, 2);
		} while ((error < 0 || rep_data[1] != 2) && limit++ < 5);
	}

	kfree(rep_data);

	return error < 0 ? error : 0;
}

static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
		struct wacom_features *features)
{
	int error = 0;
	struct usb_host_interface *interface = intf->cur_altsetting;
	struct hid_descriptor *hid_desc;

	/* default device to penabled */
	features->device_type = BTN_TOOL_PEN;

	/* only Tablet PCs need to retrieve the info */
	if ((features->type != TABLETPC) && (features->type != TABLETPC2FG))
		goto out;

	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 retrieve extra class descriptor\n");
			error = 1;
			goto out;
		}
	}
	error = wacom_parse_hid(intf, hid_desc, features);
	if (error)
		goto out;

	/* touch device found but size is not defined. use default */
	if (features->device_type == BTN_TOOL_DOUBLETAP && !features->x_max) {
		features->x_max = 1023;
		features->y_max = 1023;
	}

 out:
	return error;
}

struct wacom_usbdev_data {
	struct list_head list;
	struct kref kref;
	struct usb_device *dev;
	struct wacom_shared shared;
};

static LIST_HEAD(wacom_udev_list);
static DEFINE_MUTEX(wacom_udev_list_lock);

static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
{
	struct wacom_usbdev_data *data;

	list_for_each_entry(data, &wacom_udev_list, list) {
		if (data->dev == dev) {
			kref_get(&data->kref);
			return data;
		}
	}

	return NULL;
}

static int wacom_add_shared_data(struct wacom_wac *wacom,
				 struct usb_device *dev)
{
	struct wacom_usbdev_data *data;
	int retval = 0;

	mutex_lock(&wacom_udev_list_lock);

	data = wacom_get_usbdev_data(dev);
	if (!data) {
		data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
		if (!data) {
			retval = -ENOMEM;
			goto out;
		}

		kref_init(&data->kref);
		data->dev = dev;
		list_add_tail(&data->list, &wacom_udev_list);
	}

	wacom->shared = &data->shared;

out:
	mutex_unlock(&wacom_udev_list_lock);
	return retval;
}

static void wacom_release_shared_data(struct kref *kref)
{
	struct wacom_usbdev_data *data =
		container_of(kref, struct wacom_usbdev_data, kref);

	mutex_lock(&wacom_udev_list_lock);
	list_del(&data->list);
	mutex_unlock(&wacom_udev_list_lock);

	kfree(data);
}

static void wacom_remove_shared_data(struct wacom_wac *wacom)
{
	struct wacom_usbdev_data *data;

	if (wacom->shared) {
		data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
		kref_put(&data->kref, wacom_release_shared_data);
		wacom->shared = NULL;
	}
}

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 wacom_features *features;
	struct input_dev *input_dev;
	int error;

	if (!id->driver_info)
		return -EINVAL;

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

	wacom_wac = &wacom->wacom_wac;
	wacom_wac->features = *((struct wacom_features *)id->driver_info);
	features = &wacom_wac->features;
	if (features->pktlen > WACOM_PKGLEN_MAX) {
		error = -EINVAL;
		goto fail1;
	}

	wacom_wac->data = usb_buffer_alloc(dev, WACOM_PKGLEN_MAX,
					   GFP_KERNEL, &wacom->data_dma);
	if (!wacom_wac->data) {
		error = -ENOMEM;
		goto fail1;
	}

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

	wacom->usbdev = dev;
	wacom->intf = intf;
	mutex_init(&wacom->lock);
	usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
	strlcat(wacom->phys, "/input0", sizeof(wacom->phys));

	wacom_wac->input = input_dev;

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

	/* Retrieve the physical and logical size for OEM devices */
	error = wacom_retrieve_hid_descriptor(intf, features);
	if (error)
		goto fail2;

	strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));

	if (features->type == TABLETPC || features->type == TABLETPC2FG) {
		/* Append the device type to the name */
		strlcat(wacom_wac->name,
			features->device_type == BTN_TOOL_PEN ?
				" Pen" : " Finger",
			sizeof(wacom_wac->name));

		error = wacom_add_shared_data(wacom_wac, dev);
		if (error)
			goto fail3;
	}

	input_dev->name = wacom_wac->name;
	input_dev->name = wacom_wac->name;
	input_dev->dev.parent = &intf->dev;
	input_dev->open = wacom_open;
	input_dev->close = wacom_close;
	usb_to_input_id(dev, &input_dev->id);
	input_set_drvdata(input_dev, wacom);

	wacom_setup_input_capabilities(input_dev, wacom_wac);

	usb_fill_int_urb(wacom->irq, dev,
			 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
			 wacom_wac->data, 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(input_dev);
	if (error)
		goto fail4;

	/* Note that if query fails it is not a hard failure */
	wacom_query_tablet_data(intf, features);

	usb_set_intfdata(intf, wacom);
	return 0;

 fail4:	wacom_remove_shared_data(wacom_wac);
 fail3:	usb_free_urb(wacom->irq);
 fail2:	usb_buffer_free(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
 fail1:	input_free_device(input_dev);
	kfree(wacom);
	return error;
}

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

	usb_set_intfdata(intf, NULL);

	usb_kill_urb(wacom->irq);
	input_unregister_device(wacom->wacom_wac.input);
	usb_free_urb(wacom->irq);
	usb_buffer_free(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
			wacom->wacom_wac.data, wacom->data_dma);
	wacom_remove_shared_data(&wacom->wacom_wac);
	kfree(wacom);
}

static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
{
	struct wacom *wacom = usb_get_intfdata(intf);

	mutex_lock(&wacom->lock);
	usb_kill_urb(wacom->irq);
	mutex_unlock(&wacom->lock);

	return 0;
}

static int wacom_resume(struct usb_interface *intf)
{
	struct wacom *wacom = usb_get_intfdata(intf);
	struct wacom_features *features = &wacom->wacom_wac.features;
	int rv;

	mutex_lock(&wacom->lock);

	/* switch to wacom mode first */
	wacom_query_tablet_data(intf, features);

	if (wacom->open)
		rv = usb_submit_urb(wacom->irq, GFP_NOIO);
	else
		rv = 0;

	mutex_unlock(&wacom->lock);

	return rv;
}

static int wacom_reset_resume(struct usb_interface *intf)
{
	return wacom_resume(intf);
}

static struct usb_driver wacom_driver = {
	.name =		"wacom",
	.id_table =	wacom_ids,
	.probe =	wacom_probe,
	.disconnect =	wacom_disconnect,
	.suspend =	wacom_suspend,
	.resume =	wacom_resume,
	.reset_resume =	wacom_reset_resume,
	.supports_autosuspend = 1,
};

static int __init wacom_init(void)
{
	int result;

	result = usb_register(&wacom_driver);
	if (result == 0)
		printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
		       DRIVER_DESC "\n");
	return result;
}

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

module_init(wacom_init);
module_exit(wacom_exit);
Commit	Line	Data
3bea733a	1	/*
4104d13f	2	* drivers/input/tablet/wacom_sys.c
3bea733a	3	*
232f5693	4	* USB Wacom tablet support - system specific code
3bea733a PC	5	*/
	6
	7	/*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*/
	13
3bea733a	14	#include "wacom_wac.h"
51269fe8	15	#include "wacom.h"
3bea733a	16
545f4e99 PC	17	/* defines to get HID report descriptor */
	18	#define HID_DEVICET_HID (USB_TYPE_CLASS \| 0x01)
	19	#define HID_DEVICET_REPORT (USB_TYPE_CLASS \| 0x02)
	20	#define HID_USAGE_UNDEFINED 0x00
	21	#define HID_USAGE_PAGE 0x05
	22	#define HID_USAGE_PAGE_DIGITIZER 0x0d
	23	#define HID_USAGE_PAGE_DESKTOP 0x01
	24	#define HID_USAGE 0x09
	25	#define HID_USAGE_X 0x30
	26	#define HID_USAGE_Y 0x31
	27	#define HID_USAGE_X_TILT 0x3d
	28	#define HID_USAGE_Y_TILT 0x3e
	29	#define HID_USAGE_FINGER 0x22
	30	#define HID_USAGE_STYLUS 0x20
	31	#define HID_COLLECTION 0xc0
	32
	33	enum {
	34	WCM_UNDEFINED = 0,
	35	WCM_DESKTOP,
	36	WCM_DIGITIZER,
	37	};
	38
	39	struct hid_descriptor {
	40	struct usb_descriptor_header header;
	41	__le16 bcdHID;
	42	u8 bCountryCode;
	43	u8 bNumDescriptors;
	44	u8 bDescriptorType;
	45	__le16 wDescriptorLength;
	46	} __attribute__ ((packed));
	47
	48	/* defines to get/set USB message */
3bea733a PC	49	#define USB_REQ_GET_REPORT 0x01
3bea733a PC	50	#define USB_REQ_SET_REPORT 0x09
545f4e99	51	#define WAC_HID_FEATURE_REPORT 0x03
3bea733a PC	52
	53	static int usb_get_report(struct usb_interface *intf, unsigned char type,
	54	unsigned char id, void *buf, int size)
	55	{
	56	return usb_control_msg(interface_to_usbdev(intf),
	57	usb_rcvctrlpipe(interface_to_usbdev(intf), 0),
	58	USB_REQ_GET_REPORT, USB_TYPE_CLASS \| USB_RECIP_INTERFACE,
	59	(type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber,
	60	buf, size, 100);
	61	}
	62
	63	static int usb_set_report(struct usb_interface *intf, unsigned char type,
	64	unsigned char id, void *buf, int size)
	65	{
	66	return usb_control_msg(interface_to_usbdev(intf),
	67	usb_sndctrlpipe(interface_to_usbdev(intf), 0),
	68	USB_REQ_SET_REPORT, USB_TYPE_CLASS \| USB_RECIP_INTERFACE,
	69	(type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber,
	70	buf, size, 1000);
	71	}
	72
54c9b226	73	static void wacom_sys_irq(struct urb *urb)
3bea733a PC	74	{
3bea733a PC	75	struct wacom *wacom = urb->context;
3bea733a PC	76	int retval;
	77
	78	switch (urb->status) {
	79	case 0:
	80	/* success */
	81	break;
	82	case -ECONNRESET:
	83	case -ENOENT:
	84	case -ESHUTDOWN:
	85	/* this urb is terminated, clean up */
ea3e6c59	86	dbg("%s - urb shutting down with status: %d", __func__, urb->status);
3bea733a PC	87	return;
3bea733a PC	88	default:
ea3e6c59	89	dbg("%s - nonzero urb status received: %d", __func__, urb->status);
3bea733a PC	90	goto exit;
	91	}
	92
95dd3b30	93	wacom_wac_irq(&wacom->wacom_wac, urb->actual_length);
3bea733a PC	94
3bea733a PC	95	exit:
e7224094	96	usb_mark_last_busy(wacom->usbdev);
73a97f4f	97	retval = usb_submit_urb(urb, GFP_ATOMIC);
3bea733a PC	98	if (retval)
3bea733a PC	99	err ("%s - usb_submit_urb failed with result %d",
ea3e6c59	100	__func__, retval);
3bea733a PC	101	}
3bea733a PC	102
3bea733a PC	103	__u16 wacom_be16_to_cpu(unsigned char *data)
	104	{
	105	__u16 value;
	106	value = be16_to_cpu((__be16 ) data);
	107	return value;
	108	}
	109
	110	__u16 wacom_le16_to_cpu(unsigned char *data)
	111	{
	112	__u16 value;
8d32e3ae	113	value = le16_to_cpu((__le16 ) data);
3bea733a PC	114	return value;
	115	}
	116
3bea733a PC	117	static int wacom_open(struct input_dev *dev)
3bea733a PC	118	{
7791bdae	119	struct wacom *wacom = input_get_drvdata(dev);
3bea733a	120
e7224094 ON	121	mutex_lock(&wacom->lock);
e7224094 ON	122
3bea733a	123	wacom->irq->dev = wacom->usbdev;
e7224094 ON	124
	125	if (usb_autopm_get_interface(wacom->intf) < 0) {
	126	mutex_unlock(&wacom->lock);
3bea733a	127	return -EIO;
e7224094 ON	128	}
	129
	130	if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
	131	usb_autopm_put_interface(wacom->intf);
	132	mutex_unlock(&wacom->lock);
	133	return -EIO;
	134	}
	135
51269fe8	136	wacom->open = true;
e7224094	137	wacom->intf->needs_remote_wakeup = 1;
3bea733a	138
e7224094	139	mutex_unlock(&wacom->lock);
3bea733a PC	140	return 0;
	141	}
	142
	143	static void wacom_close(struct input_dev *dev)
	144	{
7791bdae	145	struct wacom *wacom = input_get_drvdata(dev);
3bea733a	146
e7224094	147	mutex_lock(&wacom->lock);
3bea733a	148	usb_kill_urb(wacom->irq);
51269fe8	149	wacom->open = false;
e7224094 ON	150	wacom->intf->needs_remote_wakeup = 0;
e7224094 ON	151	mutex_unlock(&wacom->lock);
3bea733a PC	152	}
3bea733a PC	153
545f4e99	154	static int wacom_parse_hid(struct usb_interface intf, struct hid_descriptor hid_desc,
ec67bbed	155	struct wacom_features *features)
545f4e99 PC	156	{
545f4e99 PC	157	struct usb_device *dev = interface_to_usbdev(intf);
ec67bbed PC	158	char limit = 0;
	159	/* result has to be defined as int for some devices */
	160	int result = 0;
545f4e99 PC	161	int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
	162	unsigned char *report;
	163
	164	report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
	165	if (!report)
	166	return -ENOMEM;
	167
	168	/* retrive report descriptors */
	169	do {
	170	result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
	171	USB_REQ_GET_DESCRIPTOR,
	172	USB_RECIP_INTERFACE \| USB_DIR_IN,
	173	HID_DEVICET_REPORT << 8,
	174	intf->altsetting[0].desc.bInterfaceNumber, /* interface */
	175	report,
	176	hid_desc->wDescriptorLength,
	177	5000); /* 5 secs */
	178	} while (result < 0 && limit++ < 5);
	179
384318ec	180	/* No need to parse the Descriptor. It isn't an error though */
545f4e99 PC	181	if (result < 0)
	182	goto out;
	183
	184	for (i = 0; i < hid_desc->wDescriptorLength; i++) {
	185
	186	switch (report[i]) {
	187	case HID_USAGE_PAGE:
	188	switch (report[i + 1]) {
	189	case HID_USAGE_PAGE_DIGITIZER:
	190	usage = WCM_DIGITIZER;
	191	i++;
	192	break;
	193
	194	case HID_USAGE_PAGE_DESKTOP:
	195	usage = WCM_DESKTOP;
	196	i++;
	197	break;
	198	}
	199	break;
	200
	201	case HID_USAGE:
	202	switch (report[i + 1]) {
	203	case HID_USAGE_X:
	204	if (usage == WCM_DESKTOP) {
	205	if (finger) {
ec67bbed PC	206	features->device_type = BTN_TOOL_DOUBLETAP;
	207	if (features->type == TABLETPC2FG) {
	208	/* need to reset back */
	209	features->pktlen = WACOM_PKGLEN_TPC2FG;
	210	features->device_type = BTN_TOOL_TRIPLETAP;
	211	}
545f4e99	212	features->x_max =
ec67bbed PC	213	wacom_le16_to_cpu(&report[i + 3]);
ec67bbed PC	214	features->x_phy =
545f4e99	215	wacom_le16_to_cpu(&report[i + 6]);
ec67bbed PC	216	features->unit = report[i + 9];
	217	features->unitExpo = report[i + 11];
	218	i += 12;
545f4e99	219	} else if (pen) {
ec67bbed PC	220	/* penabled only accepts exact bytes of data */
ec67bbed PC	221	if (features->type == TABLETPC2FG)
57e413d9	222	features->pktlen = WACOM_PKGLEN_GRAPHIRE;
ec67bbed	223	features->device_type = BTN_TOOL_PEN;
545f4e99 PC	224	features->x_max =
	225	wacom_le16_to_cpu(&report[i + 3]);
	226	i += 4;
	227	}
	228	} else if (usage == WCM_DIGITIZER) {
	229	/* max pressure isn't reported
	230	features->pressure_max = (unsigned short)
	231	(report[i+4] << 8 \| report[i + 3]);
	232	*/
	233	features->pressure_max = 255;
	234	i += 4;
	235	}
	236	break;
	237
	238	case HID_USAGE_Y:
ec67bbed PC	239	if (usage == WCM_DESKTOP) {
	240	if (finger) {
	241	features->device_type = BTN_TOOL_DOUBLETAP;
	242	if (features->type == TABLETPC2FG) {
	243	/* need to reset back */
	244	features->pktlen = WACOM_PKGLEN_TPC2FG;
	245	features->device_type = BTN_TOOL_TRIPLETAP;
	246	features->y_max =
	247	wacom_le16_to_cpu(&report[i + 3]);
	248	features->y_phy =
	249	wacom_le16_to_cpu(&report[i + 6]);
	250	i += 7;
	251	} else {
	252	features->y_max =
	253	features->x_max;
	254	features->y_phy =
	255	wacom_le16_to_cpu(&report[i + 3]);
	256	i += 4;
	257	}
	258	} else if (pen) {
	259	/* penabled only accepts exact bytes of data */
	260	if (features->type == TABLETPC2FG)
57e413d9	261	features->pktlen = WACOM_PKGLEN_GRAPHIRE;
ec67bbed PC	262	features->device_type = BTN_TOOL_PEN;
	263	features->y_max =
	264	wacom_le16_to_cpu(&report[i + 3]);
	265	i += 4;
	266	}
	267	}
545f4e99 PC	268	break;
	269
	270	case HID_USAGE_FINGER:
	271	finger = 1;
	272	i++;
	273	break;
	274
	275	case HID_USAGE_STYLUS:
	276	pen = 1;
	277	i++;
	278	break;
	279
	280	case HID_USAGE_UNDEFINED:
	281	if (usage == WCM_DESKTOP && finger) /* capacity */
	282	features->pressure_max =
	283	wacom_le16_to_cpu(&report[i + 3]);
	284	i += 4;
	285	break;
	286	}
	287	break;
	288
	289	case HID_COLLECTION:
ec67bbed	290	/* reset UsagePage and Finger */
545f4e99 PC	291	finger = usage = 0;
	292	break;
	293	}
	294	}
	295
545f4e99	296	out:
384318ec	297	result = 0;
545f4e99 PC	298	kfree(report);
	299	return result;
	300	}
	301
ec67bbed	302	static int wacom_query_tablet_data(struct usb_interface intf, struct wacom_features features)
3b7307c2 DT	303	{
3b7307c2 DT	304	unsigned char *rep_data;
ec67bbed PC	305	int limit = 0, report_id = 2;
ec67bbed PC	306	int error = -ENOMEM;
3b7307c2 DT	307
	308	rep_data = kmalloc(2, GFP_KERNEL);
	309	if (!rep_data)
ec67bbed PC	310	return error;
	311
	312	/* ask to report tablet data if it is 2FGT or not a Tablet PC */
	313	if (features->device_type == BTN_TOOL_TRIPLETAP) {
	314	do {
	315	rep_data[0] = 3;
	316	rep_data[1] = 4;
	317	report_id = 3;
	318	error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
	319	report_id, rep_data, 2);
	320	if (error >= 0)
	321	error = usb_get_report(intf,
	322	WAC_HID_FEATURE_REPORT, report_id,
	323	rep_data, 3);
	324	} while ((error < 0 \|\| rep_data[1] != 4) && limit++ < 5);
	325	} else if (features->type != TABLETPC && features->type != TABLETPC2FG) {
	326	do {
	327	rep_data[0] = 2;
	328	rep_data[1] = 2;
	329	error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
	330	report_id, rep_data, 2);
	331	if (error >= 0)
	332	error = usb_get_report(intf,
	333	WAC_HID_FEATURE_REPORT, report_id,
	334	rep_data, 2);
	335	} while ((error < 0 \|\| rep_data[1] != 2) && limit++ < 5);
	336	}
3b7307c2 DT	337
	338	kfree(rep_data);
	339
	340	return error < 0 ? error : 0;
	341	}
	342
ec67bbed PC	343	static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
	344	struct wacom_features *features)
	345	{
	346	int error = 0;
	347	struct usb_host_interface *interface = intf->cur_altsetting;
	348	struct hid_descriptor *hid_desc;
	349
	350	/* default device to penabled */
	351	features->device_type = BTN_TOOL_PEN;
	352
	353	/* only Tablet PCs need to retrieve the info */
	354	if ((features->type != TABLETPC) && (features->type != TABLETPC2FG))
	355	goto out;
	356
	357	if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
	358	if (usb_get_extra_descriptor(&interface->endpoint[0],
	359	HID_DEVICET_REPORT, &hid_desc)) {
	360	printk("wacom: can not retrieve extra class descriptor\n");
	361	error = 1;
	362	goto out;
	363	}
	364	}
	365	error = wacom_parse_hid(intf, hid_desc, features);
	366	if (error)
	367	goto out;
	368
	369	/* touch device found but size is not defined. use default */
	370	if (features->device_type == BTN_TOOL_DOUBLETAP && !features->x_max) {
	371	features->x_max = 1023;
	372	features->y_max = 1023;
	373	}
	374
	375	out:
	376	return error;
	377	}
	378
4492efff PC	379	struct wacom_usbdev_data {
	380	struct list_head list;
	381	struct kref kref;
	382	struct usb_device *dev;
	383	struct wacom_shared shared;
	384	};
	385
	386	static LIST_HEAD(wacom_udev_list);
	387	static DEFINE_MUTEX(wacom_udev_list_lock);
	388
	389	static struct wacom_usbdev_data wacom_get_usbdev_data(struct usb_device dev)
	390	{
	391	struct wacom_usbdev_data *data;
	392
	393	list_for_each_entry(data, &wacom_udev_list, list) {
	394	if (data->dev == dev) {
	395	kref_get(&data->kref);
	396	return data;
	397	}
	398	}
	399
	400	return NULL;
	401	}
	402
	403	static int wacom_add_shared_data(struct wacom_wac *wacom,
	404	struct usb_device *dev)
	405	{
	406	struct wacom_usbdev_data *data;
	407	int retval = 0;
	408
	409	mutex_lock(&wacom_udev_list_lock);
	410
	411	data = wacom_get_usbdev_data(dev);
	412	if (!data) {
	413	data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
	414	if (!data) {
	415	retval = -ENOMEM;
	416	goto out;
	417	}
	418
	419	kref_init(&data->kref);
	420	data->dev = dev;
	421	list_add_tail(&data->list, &wacom_udev_list);
	422	}
	423
	424	wacom->shared = &data->shared;
	425
	426	out:
	427	mutex_unlock(&wacom_udev_list_lock);
	428	return retval;
	429	}
	430
	431	static void wacom_release_shared_data(struct kref *kref)
	432	{
	433	struct wacom_usbdev_data *data =
	434	container_of(kref, struct wacom_usbdev_data, kref);
	435
	436	mutex_lock(&wacom_udev_list_lock);
	437	list_del(&data->list);
	438	mutex_unlock(&wacom_udev_list_lock);
	439
	440	kfree(data);
	441	}
	442
443	static void wacom_remove_shared_data(struct wacom_wac *wacom)
444	{
445	struct wacom_usbdev_data *data;
446
447	if (wacom->shared) {
448	data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
449	kref_put(&data->kref, wacom_release_shared_data);
450	wacom->shared = NULL;
451	}
452	}
453
3bea733a PC	454	static int wacom_probe(struct usb_interface intf, const struct usb_device_id id)
	455	{
	456	struct usb_device *dev = interface_to_usbdev(intf);
	457	struct usb_endpoint_descriptor *endpoint;
	458	struct wacom *wacom;
	459	struct wacom_wac *wacom_wac;
e33da8a5	460	struct wacom_features *features;
3bea733a	461	struct input_dev *input_dev;
e33da8a5	462	int error;
3bea733a	463
e33da8a5	464	if (!id->driver_info)
b036f6fb BB	465	return -EINVAL;
b036f6fb BB	466
3bea733a	467	wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
3bea733a	468	input_dev = input_allocate_device();
51269fe8	469	if (!wacom \|\| !input_dev) {
e33da8a5 JC	470	error = -ENOMEM;
	471	goto fail1;
	472	}
	473
51269fe8	474	wacom_wac = &wacom->wacom_wac;
e33da8a5 JC	475	wacom_wac->features = ((struct wacom_features )id->driver_info);
	476	features = &wacom_wac->features;
	477	if (features->pktlen > WACOM_PKGLEN_MAX) {
	478	error = -EINVAL;
3bea733a	479	goto fail1;
e33da8a5	480	}
3bea733a	481
e33da8a5 JC	482	wacom_wac->data = usb_buffer_alloc(dev, WACOM_PKGLEN_MAX,
	483	GFP_KERNEL, &wacom->data_dma);
	484	if (!wacom_wac->data) {
	485	error = -ENOMEM;
3bea733a	486	goto fail1;
e33da8a5	487	}
3bea733a PC	488
3bea733a PC	489	wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
e33da8a5 JC	490	if (!wacom->irq) {
e33da8a5 JC	491	error = -ENOMEM;
3bea733a	492	goto fail2;
e33da8a5	493	}
3bea733a PC	494
3bea733a PC	495	wacom->usbdev = dev;
e7224094 ON	496	wacom->intf = intf;
e7224094 ON	497	mutex_init(&wacom->lock);
3bea733a PC	498	usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
	499	strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
	500
8da23fc1	501	wacom_wac->input = input_dev;
3bea733a	502
545f4e99 PC	503	endpoint = &intf->cur_altsetting->endpoint[0].desc;
545f4e99 PC	504
ec67bbed PC	505	/* Retrieve the physical and logical size for OEM devices */
	506	error = wacom_retrieve_hid_descriptor(intf, features);
	507	if (error)
	508	goto fail2;
545f4e99	509
49b764ae PC	510	strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
	511
	512	if (features->type == TABLETPC \|\| features->type == TABLETPC2FG) {
	513	/* Append the device type to the name */
	514	strlcat(wacom_wac->name,
	515	features->device_type == BTN_TOOL_PEN ?
	516	" Pen" : " Finger",
	517	sizeof(wacom_wac->name));
4492efff PC	518
	519	error = wacom_add_shared_data(wacom_wac, dev);
	520	if (error)
	521	goto fail3;
49b764ae PC	522	}
	523
	524	input_dev->name = wacom_wac->name;
8da23fc1 DT	525	input_dev->name = wacom_wac->name;
	526	input_dev->dev.parent = &intf->dev;
	527	input_dev->open = wacom_open;
	528	input_dev->close = wacom_close;
	529	usb_to_input_id(dev, &input_dev->id);
	530	input_set_drvdata(input_dev, wacom);
e33da8a5	531
8da23fc1	532	wacom_setup_input_capabilities(input_dev, wacom_wac);
3bea733a	533
3bea733a PC	534	usb_fill_int_urb(wacom->irq, dev,
3bea733a PC	535	usb_rcvintpipe(dev, endpoint->bEndpointAddress),
ec67bbed	536	wacom_wac->data, features->pktlen,
8d32e3ae	537	wacom_sys_irq, wacom, endpoint->bInterval);
3bea733a PC	538	wacom->irq->transfer_dma = wacom->data_dma;
	539	wacom->irq->transfer_flags \|= URB_NO_TRANSFER_DMA_MAP;
	540
8da23fc1	541	error = input_register_device(input_dev);
5014186d	542	if (error)
4492efff	543	goto fail4;
3bea733a	544
ec67bbed PC	545	/* Note that if query fails it is not a hard failure */
ec67bbed PC	546	wacom_query_tablet_data(intf, features);
3bea733a PC	547
	548	usb_set_intfdata(intf, wacom);
	549	return 0;
	550
4492efff	551	fail4: wacom_remove_shared_data(wacom_wac);
5014186d	552	fail3: usb_free_urb(wacom->irq);
ec67bbed	553	fail2: usb_buffer_free(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
5014186d	554	fail1: input_free_device(input_dev);
3bea733a	555	kfree(wacom);
5014186d	556	return error;
3bea733a PC	557	}
	558
	559	static void wacom_disconnect(struct usb_interface *intf)
	560	{
e7224094	561	struct wacom *wacom = usb_get_intfdata(intf);
3bea733a PC	562
3bea733a PC	563	usb_set_intfdata(intf, NULL);
e7224094 ON	564
e7224094 ON	565	usb_kill_urb(wacom->irq);
8da23fc1	566	input_unregister_device(wacom->wacom_wac.input);
e7224094	567	usb_free_urb(wacom->irq);
ec67bbed	568	usb_buffer_free(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
51269fe8 DT	569	wacom->wacom_wac.data, wacom->data_dma);
51269fe8 DT	570	wacom_remove_shared_data(&wacom->wacom_wac);
e7224094 ON	571	kfree(wacom);
	572	}
	573
	574	static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
	575	{
	576	struct wacom *wacom = usb_get_intfdata(intf);
	577
	578	mutex_lock(&wacom->lock);
	579	usb_kill_urb(wacom->irq);
	580	mutex_unlock(&wacom->lock);
	581
	582	return 0;
	583	}
	584
	585	static int wacom_resume(struct usb_interface *intf)
	586	{
	587	struct wacom *wacom = usb_get_intfdata(intf);
51269fe8	588	struct wacom_features *features = &wacom->wacom_wac.features;
e7224094 ON	589	int rv;
	590
	591	mutex_lock(&wacom->lock);
38101475 PC	592
	593	/* switch to wacom mode first */
	594	wacom_query_tablet_data(intf, features);
	595
	596	if (wacom->open)
e7224094	597	rv = usb_submit_urb(wacom->irq, GFP_NOIO);
38101475	598	else
e7224094	599	rv = 0;
38101475	600
e7224094 ON	601	mutex_unlock(&wacom->lock);
	602
	603	return rv;
	604	}
	605
	606	static int wacom_reset_resume(struct usb_interface *intf)
	607	{
	608	return wacom_resume(intf);
3bea733a PC	609	}
	610
	611	static struct usb_driver wacom_driver = {
	612	.name = "wacom",
b036f6fb	613	.id_table = wacom_ids,
3bea733a PC	614	.probe = wacom_probe,
3bea733a PC	615	.disconnect = wacom_disconnect,
e7224094 ON	616	.suspend = wacom_suspend,
	617	.resume = wacom_resume,
	618	.reset_resume = wacom_reset_resume,
	619	.supports_autosuspend = 1,
3bea733a PC	620	};
	621
	622	static int __init wacom_init(void)
	623	{
	624	int result;
b036f6fb	625
3bea733a PC	626	result = usb_register(&wacom_driver);
3bea733a PC	627	if (result == 0)
899ef6e7 GKH	628	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
899ef6e7 GKH	629	DRIVER_DESC "\n");
3bea733a PC	630	return result;
	631	}
	632
	633	static void __exit wacom_exit(void)
	634	{
	635	usb_deregister(&wacom_driver);
	636	}
	637
	638	module_init(wacom_init);
	639	module_exit(wacom_exit);