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

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.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 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 */
		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;
	}


	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)
		err("%s - usb_submit_urb failed with result %d",
		     __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_buffer_alloc(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->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_buffer_free(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_buffer_free(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,
};

static int __init kbtab_init(void)
{
	int retval;
	retval = usb_register(&kbtab_driver);
	if (retval)
		goto out;
	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
	       DRIVER_DESC "\n");
out:
	return retval;
}

static void __exit kbtab_exit(void)
{
	usb_deregister(&kbtab_driver);
}

module_init(kbtab_init);
module_exit(kbtab_exit);
Commit	Line	Data
1da177e4 LT	1	#include <linux/kernel.h>
1da177e4 LT	2	#include <linux/slab.h>
1da177e4 LT	3	#include <linux/module.h>
1da177e4 LT	4	#include <linux/init.h>
ae0dadcf	5	#include <linux/usb/input.h>
1da177e4	6	#include <asm/unaligned.h>
1da177e4 LT	7
	8	/*
	9	* Version Information
	10	* v0.0.1 - Original, extremely basic version, 2.4.xx only
	11	* v0.0.2 - Updated, works with 2.5.62 and 2.4.20;
	12	* - added pressure-threshold modules param code from
	13	* Alex Perry <alex.perry@ieee.org>
	14	*/
	15
	16	#define DRIVER_VERSION "v0.0.2"
	17	#define DRIVER_AUTHOR "Josh Myer <josh@joshisanerd.com>"
	18	#define DRIVER_DESC "USB KB Gear JamStudio Tablet driver"
	19	#define DRIVER_LICENSE "GPL"
	20
	21	MODULE_AUTHOR(DRIVER_AUTHOR);
	22	MODULE_DESCRIPTION(DRIVER_DESC);
	23	MODULE_LICENSE(DRIVER_LICENSE);
	24
	25	#define USB_VENDOR_ID_KBGEAR 0x084e
	26
	27	static int kb_pressure_click = 0x10;
	28	module_param(kb_pressure_click, int, 0);
	29	MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks");
	30
	31	struct kbtab {
4ee1fc8e	32	unsigned char *data;
1da177e4	33	dma_addr_t data_dma;
c5b7c7c3	34	struct input_dev *dev;
1da177e4 LT	35	struct usb_device *usbdev;
1da177e4 LT	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 */
ea3e6c59	56	dbg("%s - urb shutting down with status: %d", __func__, urb->status);
1da177e4 LT	57	return;
1da177e4 LT	58	default:
ea3e6c59	59	dbg("%s - nonzero urb status received: %d", __func__, urb->status);
1da177e4 LT	60	goto exit;
	61	}
	62
1da177e4 LT	63
	64	input_report_key(dev, BTN_TOOL_PEN, 1);
	65
f3192090 DT	66	input_report_abs(dev, ABS_X, get_unaligned_le16(&data[1]));
f3192090 DT	67	input_report_abs(dev, ABS_Y, get_unaligned_le16(&data[3]));
1da177e4 LT	68
	69	/input_report_key(dev, BTN_TOUCH , data[0] & 0x01);/
	70	input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
	71
f3192090 DT	72	pressure = data[5];
	73	if (kb_pressure_click == -1)
	74	input_report_abs(dev, ABS_PRESSURE, pressure);
	75	else
	76	input_report_key(dev, BTN_LEFT, pressure > kb_pressure_click ? 1 : 0);
05f091ab	77
1da177e4 LT	78	input_sync(dev);
	79
	80	exit:
f3192090	81	retval = usb_submit_urb(urb, GFP_ATOMIC);
1da177e4	82	if (retval)
f3192090	83	err("%s - usb_submit_urb failed with result %d",
ea3e6c59	84	__func__, retval);
1da177e4 LT	85	}
	86
	87	static struct usb_device_id kbtab_ids[] = {
	88	{ USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 },
	89	{ }
	90	};
	91
	92	MODULE_DEVICE_TABLE(usb, kbtab_ids);
	93
	94	static int kbtab_open(struct input_dev *dev)
	95	{
7791bdae	96	struct kbtab *kbtab = input_get_drvdata(dev);
1da177e4	97
1da177e4	98	kbtab->irq->dev = kbtab->usbdev;
65cde54b	99	if (usb_submit_urb(kbtab->irq, GFP_KERNEL))
1da177e4	100	return -EIO;
1da177e4 LT	101
	102	return 0;
	103	}
	104
	105	static void kbtab_close(struct input_dev *dev)
	106	{
7791bdae	107	struct kbtab *kbtab = input_get_drvdata(dev);
1da177e4	108
65cde54b	109	usb_kill_urb(kbtab->irq);
1da177e4 LT	110	}
	111
	112	static int kbtab_probe(struct usb_interface intf, const struct usb_device_id id)
	113	{
	114	struct usb_device *dev = interface_to_usbdev(intf);
	115	struct usb_endpoint_descriptor *endpoint;
	116	struct kbtab *kbtab;
c5b7c7c3	117	struct input_dev *input_dev;
5014186d	118	int error = -ENOMEM;
1da177e4	119
c5b7c7c3 DT	120	kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL);
	121	input_dev = input_allocate_device();
	122	if (!kbtab \|\| !input_dev)
	123	goto fail1;
1da177e4 LT	124
1da177e4 LT	125	kbtab->data = usb_buffer_alloc(dev, 8, GFP_KERNEL, &kbtab->data_dma);
c5b7c7c3 DT	126	if (!kbtab->data)
c5b7c7c3 DT	127	goto fail1;
1da177e4 LT	128
1da177e4 LT	129	kbtab->irq = usb_alloc_urb(0, GFP_KERNEL);
c5b7c7c3 DT	130	if (!kbtab->irq)
c5b7c7c3 DT	131	goto fail2;
1da177e4	132
c5b7c7c3 DT	133	kbtab->usbdev = dev;
c5b7c7c3 DT	134	kbtab->dev = input_dev;
05f091ab	135
c5b7c7c3 DT	136	usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys));
c5b7c7c3 DT	137	strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys));
1da177e4	138
c5b7c7c3 DT	139	input_dev->name = "KB Gear Tablet";
	140	input_dev->phys = kbtab->phys;
	141	usb_to_input_id(dev, &input_dev->id);
c0f82d57	142	input_dev->dev.parent = &intf->dev;
7791bdae DT	143
7791bdae DT	144	input_set_drvdata(input_dev, kbtab);
1da177e4	145
c5b7c7c3 DT	146	input_dev->open = kbtab_open;
c5b7c7c3 DT	147	input_dev->close = kbtab_close;
1da177e4	148
f3192090 DT	149	input_dev->evbit[0] \|= BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
	150	input_dev->keybit[BIT_WORD(BTN_LEFT)] \|=
	151	BIT_MASK(BTN_LEFT) \| BIT_MASK(BTN_RIGHT);
	152	input_dev->keybit[BIT_WORD(BTN_DIGI)] \|=
	153	BIT_MASK(BTN_TOOL_PEN) \| BIT_MASK(BTN_TOUCH);
c5b7c7c3	154	input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0);
19947544	155	input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0);
c5b7c7c3	156	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);
1da177e4 LT	157
	158	endpoint = &intf->cur_altsetting->endpoint[0].desc;
	159
	160	usb_fill_int_urb(kbtab->irq, dev,
	161	usb_rcvintpipe(dev, endpoint->bEndpointAddress),
	162	kbtab->data, 8,
	163	kbtab_irq, kbtab, endpoint->bInterval);
	164	kbtab->irq->transfer_dma = kbtab->data_dma;
	165	kbtab->irq->transfer_flags \|= URB_NO_TRANSFER_DMA_MAP;
	166
5014186d DT	167	error = input_register_device(kbtab->dev);
	168	if (error)
	169	goto fail3;
1da177e4 LT	170
1da177e4 LT	171	usb_set_intfdata(intf, kbtab);
5014186d	172
1da177e4	173	return 0;
c5b7c7c3	174
5014186d	175	fail3: usb_free_urb(kbtab->irq);
ee7aa6ce	176	fail2: usb_buffer_free(dev, 8, kbtab->data, kbtab->data_dma);
5014186d	177	fail1: input_free_device(input_dev);
c5b7c7c3	178	kfree(kbtab);
5014186d	179	return error;
1da177e4 LT	180	}
	181
	182	static void kbtab_disconnect(struct usb_interface *intf)
	183	{
c5b7c7c3	184	struct kbtab *kbtab = usb_get_intfdata(intf);
1da177e4 LT	185
1da177e4 LT	186	usb_set_intfdata(intf, NULL);
331cb022 DT	187
	188	input_unregister_device(kbtab->dev);
	189	usb_free_urb(kbtab->irq);
	190	usb_buffer_free(kbtab->usbdev, 8, kbtab->data, kbtab->data_dma);
	191	kfree(kbtab);
1da177e4 LT	192	}
	193
	194	static struct usb_driver kbtab_driver = {
1da177e4 LT	195	.name = "kbtab",
	196	.probe = kbtab_probe,
	197	.disconnect = kbtab_disconnect,
	198	.id_table = kbtab_ids,
	199	};
	200
	201	static int __init kbtab_init(void)
	202	{
	203	int retval;
	204	retval = usb_register(&kbtab_driver);
	205	if (retval)
	206	goto out;
899ef6e7 GKH	207	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
899ef6e7 GKH	208	DRIVER_DESC "\n");
1da177e4 LT	209	out:
	210	return retval;
	211	}
	212
	213	static void __exit kbtab_exit(void)
	214	{
	215	usb_deregister(&kbtab_driver);
	216	}
	217
	218	module_init(kbtab_init);
	219	module_exit(kbtab_exit);