[deliverable/linux.git] / drivers / input / tablet / kbtab.c

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

/*
 * Version Information
 * v0.0.1 - Original, extremely basic version, 2.4.xx only
 * v0.0.2 - Updated, works with 2.5.62 and 2.4.20;
 *           - added pressure-threshold modules param code from
 *              Alex Perry <alex.perry@ieee.org>
 */

#define DRIVER_VERSION "v0.0.2"
#define DRIVER_AUTHOR "Josh Myer <josh@joshisanerd.com>"
#define DRIVER_DESC "USB KB Gear JamStudio Tablet driver"
#define DRIVER_LICENSE "GPL"

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

#define USB_VENDOR_ID_KBGEAR	0x084e

static int kb_pressure_click = 0x10;
module_param(kb_pressure_click, int, 0);
MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks");

struct kbtab {
	unsigned char *data;
	dma_addr_t data_dma;
	struct input_dev *dev;
	struct usb_device *usbdev;
	struct usb_interface *intf;
	struct urb *irq;
	char phys[32];
};

static void kbtab_irq(struct urb *urb)
{
	struct kbtab *kbtab = urb->context;
	unsigned char *data = kbtab->data;
	struct input_dev *dev = kbtab->dev;
	int pressure;
	int retval;

	switch (urb->status) {
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
		dev_dbg(&kbtab->intf->dev,
			"%s - urb shutting down with status: %d\n",
			__func__, urb->status);
		return;
	default:
		dev_dbg(&kbtab->intf->dev,
			"%s - nonzero urb status received: %d\n",
			__func__, urb->status);
		goto exit;
	}


	input_report_key(dev, BTN_TOOL_PEN, 1);

	input_report_abs(dev, ABS_X, get_unaligned_le16(&data[1]));
	input_report_abs(dev, ABS_Y, get_unaligned_le16(&data[3]));

	/*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/
	input_report_key(dev, BTN_RIGHT, data[0] & 0x02);

	pressure = data[5];
	if (kb_pressure_click == -1)
		input_report_abs(dev, ABS_PRESSURE, pressure);
	else
		input_report_key(dev, BTN_LEFT, pressure > kb_pressure_click ? 1 : 0);

	input_sync(dev);

 exit:
	retval = usb_submit_urb(urb, GFP_ATOMIC);
	if (retval)
		dev_err(&kbtab->intf->dev,
			"%s - usb_submit_urb failed with result %d\n",
			__func__, retval);
}

static struct usb_device_id kbtab_ids[] = {
	{ USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 },
	{ }
};

MODULE_DEVICE_TABLE(usb, kbtab_ids);

static int kbtab_open(struct input_dev *dev)
{
	struct kbtab *kbtab = input_get_drvdata(dev);

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

	return 0;
}

static void kbtab_close(struct input_dev *dev)
{
	struct kbtab *kbtab = input_get_drvdata(dev);

	usb_kill_urb(kbtab->irq);
}

static int kbtab_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 kbtab *kbtab;
	struct input_dev *input_dev;
	int error = -ENOMEM;

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

	kbtab->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &kbtab->data_dma);
	if (!kbtab->data)
		goto fail1;

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

	kbtab->usbdev = dev;
	kbtab->intf = intf;
	kbtab->dev = input_dev;

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

	input_dev->name = "KB Gear Tablet";
	input_dev->phys = kbtab->phys;
	usb_to_input_id(dev, &input_dev->id);
	input_dev->dev.parent = &intf->dev;

	input_set_drvdata(input_dev, kbtab);

	input_dev->open = kbtab_open;
	input_dev->close = kbtab_close;

	input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
	input_dev->keybit[BIT_WORD(BTN_LEFT)] |=
		BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
	input_dev->keybit[BIT_WORD(BTN_DIGI)] |=
		BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_TOUCH);
	input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0);
	input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0);
	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);

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

	usb_fill_int_urb(kbtab->irq, dev,
			 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
			 kbtab->data, 8,
			 kbtab_irq, kbtab, endpoint->bInterval);
	kbtab->irq->transfer_dma = kbtab->data_dma;
	kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

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

	usb_set_intfdata(intf, kbtab);

	return 0;

 fail3:	usb_free_urb(kbtab->irq);
 fail2:	usb_free_coherent(dev, 8, kbtab->data, kbtab->data_dma);
 fail1:	input_free_device(input_dev);
	kfree(kbtab);
	return error;
}

static void kbtab_disconnect(struct usb_interface *intf)
{
	struct kbtab *kbtab = usb_get_intfdata(intf);

	usb_set_intfdata(intf, NULL);

	input_unregister_device(kbtab->dev);
	usb_free_urb(kbtab->irq);
	usb_free_coherent(kbtab->usbdev, 8, kbtab->data, kbtab->data_dma);
	kfree(kbtab);
}

static struct usb_driver kbtab_driver = {
	.name =		"kbtab",
	.probe =	kbtab_probe,
	.disconnect =	kbtab_disconnect,
	.id_table =	kbtab_ids,
};

module_usb_driver(kbtab_driver);
Commit	Line	Data
1da177e4 LT	1	#include <linux/kernel.h>
1da177e4 LT	2	#include <linux/slab.h>
1da177e4	3	#include <linux/module.h>
ae0dadcf	4	#include <linux/usb/input.h>
1da177e4	5	#include <asm/unaligned.h>
1da177e4 LT	6
	7	/*
	8	* Version Information
	9	* v0.0.1 - Original, extremely basic version, 2.4.xx only
	10	* v0.0.2 - Updated, works with 2.5.62 and 2.4.20;
	11	* - added pressure-threshold modules param code from
	12	* Alex Perry <alex.perry@ieee.org>
	13	*/
	14
	15	#define DRIVER_VERSION "v0.0.2"
	16	#define DRIVER_AUTHOR "Josh Myer <josh@joshisanerd.com>"
	17	#define DRIVER_DESC "USB KB Gear JamStudio Tablet driver"
	18	#define DRIVER_LICENSE "GPL"
	19
	20	MODULE_AUTHOR(DRIVER_AUTHOR);
	21	MODULE_DESCRIPTION(DRIVER_DESC);
	22	MODULE_LICENSE(DRIVER_LICENSE);
	23
	24	#define USB_VENDOR_ID_KBGEAR 0x084e
	25
	26	static int kb_pressure_click = 0x10;
	27	module_param(kb_pressure_click, int, 0);
	28	MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks");
	29
	30	struct kbtab {
4ee1fc8e	31	unsigned char *data;
1da177e4	32	dma_addr_t data_dma;
c5b7c7c3	33	struct input_dev *dev;
1da177e4	34	struct usb_device *usbdev;
ed2b2f2d	35	struct usb_interface *intf;
1da177e4	36	struct urb *irq;
1da177e4 LT	37	char phys[32];
	38	};
	39
7d12e780	40	static void kbtab_irq(struct urb *urb)
1da177e4 LT	41	{
	42	struct kbtab *kbtab = urb->context;
	43	unsigned char *data = kbtab->data;
c5b7c7c3	44	struct input_dev *dev = kbtab->dev;
f3192090	45	int pressure;
1da177e4 LT	46	int retval;
	47
	48	switch (urb->status) {
	49	case 0:
	50	/* success */
	51	break;
	52	case -ECONNRESET:
	53	case -ENOENT:
	54	case -ESHUTDOWN:
	55	/* this urb is terminated, clean up */
ed2b2f2d GKH	56	dev_dbg(&kbtab->intf->dev,
ed2b2f2d GKH	57	"%s - urb shutting down with status: %d\n",
6d0f7dcb	58	__func__, urb->status);
1da177e4 LT	59	return;
1da177e4 LT	60	default:
ed2b2f2d GKH	61	dev_dbg(&kbtab->intf->dev,
ed2b2f2d GKH	62	"%s - nonzero urb status received: %d\n",
6d0f7dcb	63	__func__, urb->status);
1da177e4 LT	64	goto exit;
	65	}
	66
1da177e4 LT	67
	68	input_report_key(dev, BTN_TOOL_PEN, 1);
	69
f3192090 DT	70	input_report_abs(dev, ABS_X, get_unaligned_le16(&data[1]));
f3192090 DT	71	input_report_abs(dev, ABS_Y, get_unaligned_le16(&data[3]));
1da177e4 LT	72
	73	/input_report_key(dev, BTN_TOUCH , data[0] & 0x01);/
	74	input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
	75
f3192090 DT	76	pressure = data[5];
	77	if (kb_pressure_click == -1)
	78	input_report_abs(dev, ABS_PRESSURE, pressure);
	79	else
	80	input_report_key(dev, BTN_LEFT, pressure > kb_pressure_click ? 1 : 0);
05f091ab	81
1da177e4 LT	82	input_sync(dev);
	83
	84	exit:
f3192090	85	retval = usb_submit_urb(urb, GFP_ATOMIC);
1da177e4	86	if (retval)
ed2b2f2d	87	dev_err(&kbtab->intf->dev,
202712c2 GKH	88	"%s - usb_submit_urb failed with result %d\n",
202712c2 GKH	89	__func__, retval);
1da177e4 LT	90	}
	91
	92	static struct usb_device_id kbtab_ids[] = {
	93	{ USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 },
	94	{ }
	95	};
	96
	97	MODULE_DEVICE_TABLE(usb, kbtab_ids);
	98
	99	static int kbtab_open(struct input_dev *dev)
	100	{
7791bdae	101	struct kbtab *kbtab = input_get_drvdata(dev);
1da177e4	102
1da177e4	103	kbtab->irq->dev = kbtab->usbdev;
65cde54b	104	if (usb_submit_urb(kbtab->irq, GFP_KERNEL))
1da177e4	105	return -EIO;
1da177e4 LT	106
	107	return 0;
	108	}
	109
	110	static void kbtab_close(struct input_dev *dev)
	111	{
7791bdae	112	struct kbtab *kbtab = input_get_drvdata(dev);
1da177e4	113
65cde54b	114	usb_kill_urb(kbtab->irq);
1da177e4 LT	115	}
	116
	117	static int kbtab_probe(struct usb_interface intf, const struct usb_device_id id)
	118	{
	119	struct usb_device *dev = interface_to_usbdev(intf);
	120	struct usb_endpoint_descriptor *endpoint;
	121	struct kbtab *kbtab;
c5b7c7c3	122	struct input_dev *input_dev;
5014186d	123	int error = -ENOMEM;
1da177e4	124
c5b7c7c3 DT	125	kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL);
	126	input_dev = input_allocate_device();
	127	if (!kbtab \|\| !input_dev)
	128	goto fail1;
1da177e4	129
997ea58e	130	kbtab->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &kbtab->data_dma);
c5b7c7c3 DT	131	if (!kbtab->data)
c5b7c7c3 DT	132	goto fail1;
1da177e4 LT	133
1da177e4 LT	134	kbtab->irq = usb_alloc_urb(0, GFP_KERNEL);
c5b7c7c3 DT	135	if (!kbtab->irq)
c5b7c7c3 DT	136	goto fail2;
1da177e4	137
c5b7c7c3	138	kbtab->usbdev = dev;
ed2b2f2d	139	kbtab->intf = intf;
c5b7c7c3	140	kbtab->dev = input_dev;
05f091ab	141
c5b7c7c3 DT	142	usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys));
c5b7c7c3 DT	143	strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys));
1da177e4	144
c5b7c7c3 DT	145	input_dev->name = "KB Gear Tablet";
	146	input_dev->phys = kbtab->phys;
	147	usb_to_input_id(dev, &input_dev->id);
c0f82d57	148	input_dev->dev.parent = &intf->dev;
7791bdae DT	149
7791bdae DT	150	input_set_drvdata(input_dev, kbtab);
1da177e4	151
c5b7c7c3 DT	152	input_dev->open = kbtab_open;
c5b7c7c3 DT	153	input_dev->close = kbtab_close;
1da177e4	154
f3192090 DT	155	input_dev->evbit[0] \|= BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
	156	input_dev->keybit[BIT_WORD(BTN_LEFT)] \|=
	157	BIT_MASK(BTN_LEFT) \| BIT_MASK(BTN_RIGHT);
	158	input_dev->keybit[BIT_WORD(BTN_DIGI)] \|=
	159	BIT_MASK(BTN_TOOL_PEN) \| BIT_MASK(BTN_TOUCH);
c5b7c7c3	160	input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0);
19947544	161	input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0);
c5b7c7c3	162	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);
1da177e4 LT	163
	164	endpoint = &intf->cur_altsetting->endpoint[0].desc;
	165
	166	usb_fill_int_urb(kbtab->irq, dev,
	167	usb_rcvintpipe(dev, endpoint->bEndpointAddress),
	168	kbtab->data, 8,
	169	kbtab_irq, kbtab, endpoint->bInterval);
	170	kbtab->irq->transfer_dma = kbtab->data_dma;
	171	kbtab->irq->transfer_flags \|= URB_NO_TRANSFER_DMA_MAP;
	172
5014186d DT	173	error = input_register_device(kbtab->dev);
	174	if (error)
	175	goto fail3;
1da177e4 LT	176
1da177e4 LT	177	usb_set_intfdata(intf, kbtab);
5014186d	178
1da177e4	179	return 0;
c5b7c7c3	180
5014186d	181	fail3: usb_free_urb(kbtab->irq);
7a9b1492	182	fail2: usb_free_coherent(dev, 8, kbtab->data, kbtab->data_dma);
5014186d	183	fail1: input_free_device(input_dev);
c5b7c7c3	184	kfree(kbtab);
5014186d	185	return error;
1da177e4 LT	186	}
	187
	188	static void kbtab_disconnect(struct usb_interface *intf)
	189	{
c5b7c7c3	190	struct kbtab *kbtab = usb_get_intfdata(intf);
1da177e4 LT	191
1da177e4 LT	192	usb_set_intfdata(intf, NULL);
331cb022 DT	193
	194	input_unregister_device(kbtab->dev);
	195	usb_free_urb(kbtab->irq);
7a9b1492	196	usb_free_coherent(kbtab->usbdev, 8, kbtab->data, kbtab->data_dma);
331cb022	197	kfree(kbtab);
1da177e4 LT	198	}
	199
	200	static struct usb_driver kbtab_driver = {
1da177e4 LT	201	.name = "kbtab",
	202	.probe = kbtab_probe,
	203	.disconnect = kbtab_disconnect,
	204	.id_table = kbtab_ids,
	205	};
	206
08642e7c	207	module_usb_driver(kbtab_driver);