[mirror_ubuntu-artful-kernel.git] / drivers / usb / input / 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 {
	signed char *data;
	dma_addr_t data_dma;
	struct input_dev *dev;
	struct usb_device *usbdev;
	struct urb *irq;
	int x, y;
	int button;
	int pressure;
	__u32 serial[2];
	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 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;
	}

	kbtab->x = le16_to_cpu(get_unaligned((__le16 *) &data[1]));
	kbtab->y = le16_to_cpu(get_unaligned((__le16 *) &data[3]));

	kbtab->pressure = (data[5]);

	input_report_key(dev, BTN_TOOL_PEN, 1);

	input_report_abs(dev, ABS_X, kbtab->x);
	input_report_abs(dev, ABS_Y, kbtab->y);

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

	if (-1 == kb_pressure_click) {
		input_report_abs(dev, ABS_PRESSURE, kbtab->pressure);
	} else {
		input_report_key(dev, BTN_LEFT, (kbtab->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",
		     __FUNCTION__, 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 = dev->private;

	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 = dev->private;

	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->cdev.dev = &intf->dev;
	input_dev->private = kbtab;

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

	input_dev->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC);
	input_dev->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
	input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH);
	input_dev->mscbit[0] |= BIT(MSC_SERIAL);
	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, 10, 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);
	if (kbtab) {
		usb_kill_urb(kbtab->irq);
		input_unregister_device(kbtab->dev);
		usb_free_urb(kbtab->irq);
		usb_buffer_free(interface_to_usbdev(intf), 10, 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;
	info(DRIVER_VERSION ":" DRIVER_DESC);
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 {
	32	signed char *data;
	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	int x, y;
	38	int button;
	39	int pressure;
	40	__u32 serial[2];
	41	char phys[32];
	42	};
	43
7d12e780	44	static void kbtab_irq(struct urb *urb)
1da177e4 LT	45	{
	46	struct kbtab *kbtab = urb->context;
	47	unsigned char *data = kbtab->data;
c5b7c7c3	48	struct input_dev *dev = kbtab->dev;
1da177e4 LT	49	int retval;
	50
	51	switch (urb->status) {
	52	case 0:
	53	/* success */
	54	break;
	55	case -ECONNRESET:
	56	case -ENOENT:
	57	case -ESHUTDOWN:
	58	/* this urb is terminated, clean up */
	59	dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
	60	return;
	61	default:
	62	dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
	63	goto exit;
	64	}
	65
	66	kbtab->x = le16_to_cpu(get_unaligned((__le16 *) &data[1]));
	67	kbtab->y = le16_to_cpu(get_unaligned((__le16 *) &data[3]));
	68
	69	kbtab->pressure = (data[5]);
	70
	71	input_report_key(dev, BTN_TOOL_PEN, 1);
	72
	73	input_report_abs(dev, ABS_X, kbtab->x);
	74	input_report_abs(dev, ABS_Y, kbtab->y);
	75
	76	/input_report_key(dev, BTN_TOUCH , data[0] & 0x01);/
	77	input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
	78
05f091ab	79	if (-1 == kb_pressure_click) {
1da177e4 LT	80	input_report_abs(dev, ABS_PRESSURE, kbtab->pressure);
	81	} else {
	82	input_report_key(dev, BTN_LEFT, (kbtab->pressure > kb_pressure_click) ? 1 : 0);
	83	};
05f091ab	84
1da177e4 LT	85	input_sync(dev);
	86
	87	exit:
	88	retval = usb_submit_urb (urb, GFP_ATOMIC);
	89	if (retval)
	90	err ("%s - usb_submit_urb failed with result %d",
	91	__FUNCTION__, retval);
	92	}
	93
	94	static struct usb_device_id kbtab_ids[] = {
	95	{ USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 },
	96	{ }
	97	};
	98
	99	MODULE_DEVICE_TABLE(usb, kbtab_ids);
	100
	101	static int kbtab_open(struct input_dev *dev)
	102	{
	103	struct kbtab *kbtab = dev->private;
	104
1da177e4	105	kbtab->irq->dev = kbtab->usbdev;
65cde54b	106	if (usb_submit_urb(kbtab->irq, GFP_KERNEL))
1da177e4	107	return -EIO;
1da177e4 LT	108
	109	return 0;
	110	}
	111
	112	static void kbtab_close(struct input_dev *dev)
	113	{
	114	struct kbtab *kbtab = dev->private;
	115
65cde54b	116	usb_kill_urb(kbtab->irq);
1da177e4 LT	117	}
	118
	119	static int kbtab_probe(struct usb_interface intf, const struct usb_device_id id)
	120	{
	121	struct usb_device *dev = interface_to_usbdev(intf);
	122	struct usb_endpoint_descriptor *endpoint;
	123	struct kbtab *kbtab;
c5b7c7c3	124	struct input_dev *input_dev;
5014186d	125	int error = -ENOMEM;
1da177e4	126
c5b7c7c3 DT	127	kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL);
	128	input_dev = input_allocate_device();
	129	if (!kbtab \|\| !input_dev)
	130	goto fail1;
1da177e4 LT	131
1da177e4 LT	132	kbtab->data = usb_buffer_alloc(dev, 8, GFP_KERNEL, &kbtab->data_dma);
c5b7c7c3 DT	133	if (!kbtab->data)
c5b7c7c3 DT	134	goto fail1;
1da177e4 LT	135
1da177e4 LT	136	kbtab->irq = usb_alloc_urb(0, GFP_KERNEL);
c5b7c7c3 DT	137	if (!kbtab->irq)
c5b7c7c3 DT	138	goto fail2;
1da177e4	139
c5b7c7c3 DT	140	kbtab->usbdev = dev;
c5b7c7c3 DT	141	kbtab->dev = input_dev;
05f091ab	142
c5b7c7c3 DT	143	usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys));
c5b7c7c3 DT	144	strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys));
1da177e4	145
c5b7c7c3 DT	146	input_dev->name = "KB Gear Tablet";
	147	input_dev->phys = kbtab->phys;
	148	usb_to_input_id(dev, &input_dev->id);
	149	input_dev->cdev.dev = &intf->dev;
	150	input_dev->private = kbtab;
1da177e4	151
c5b7c7c3 DT	152	input_dev->open = kbtab_open;
c5b7c7c3 DT	153	input_dev->close = kbtab_close;
1da177e4	154
c5b7c7c3 DT	155	input_dev->evbit[0] \|= BIT(EV_KEY) \| BIT(EV_ABS) \| BIT(EV_MSC);
	156	input_dev->keybit[LONG(BTN_LEFT)] \|= BIT(BTN_LEFT) \| BIT(BTN_RIGHT) \| BIT(BTN_MIDDLE);
	157	input_dev->keybit[LONG(BTN_DIGI)] \|= BIT(BTN_TOOL_PEN) \| BIT(BTN_TOUCH);
	158	input_dev->mscbit[0] \|= BIT(MSC_SERIAL);
	159	input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0);
19947544	160	input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0);
c5b7c7c3	161	input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);
1da177e4 LT	162
	163	endpoint = &intf->cur_altsetting->endpoint[0].desc;
	164
	165	usb_fill_int_urb(kbtab->irq, dev,
	166	usb_rcvintpipe(dev, endpoint->bEndpointAddress),
	167	kbtab->data, 8,
	168	kbtab_irq, kbtab, endpoint->bInterval);
	169	kbtab->irq->transfer_dma = kbtab->data_dma;
	170	kbtab->irq->transfer_flags \|= URB_NO_TRANSFER_DMA_MAP;
	171
5014186d DT	172	error = input_register_device(kbtab->dev);
	173	if (error)
	174	goto fail3;
1da177e4 LT	175
1da177e4 LT	176	usb_set_intfdata(intf, kbtab);
5014186d	177
1da177e4	178	return 0;
c5b7c7c3	179
5014186d DT	180	fail3: usb_free_urb(kbtab->irq);
	181	fail2: usb_buffer_free(dev, 10, kbtab->data, kbtab->data_dma);
	182	fail1: input_free_device(input_dev);
c5b7c7c3	183	kfree(kbtab);
5014186d	184	return error;
1da177e4 LT	185	}
	186
	187	static void kbtab_disconnect(struct usb_interface *intf)
	188	{
c5b7c7c3	189	struct kbtab *kbtab = usb_get_intfdata(intf);
1da177e4 LT	190
	191	usb_set_intfdata(intf, NULL);
	192	if (kbtab) {
	193	usb_kill_urb(kbtab->irq);
c5b7c7c3	194	input_unregister_device(kbtab->dev);
1da177e4 LT	195	usb_free_urb(kbtab->irq);
	196	usb_buffer_free(interface_to_usbdev(intf), 10, kbtab->data, kbtab->data_dma);
	197	kfree(kbtab);
	198	}
	199	}
	200
	201	static struct usb_driver kbtab_driver = {
1da177e4 LT	202	.name = "kbtab",
	203	.probe = kbtab_probe,
	204	.disconnect = kbtab_disconnect,
	205	.id_table = kbtab_ids,
	206	};
	207
	208	static int __init kbtab_init(void)
	209	{
	210	int retval;
	211	retval = usb_register(&kbtab_driver);
	212	if (retval)
	213	goto out;
	214	info(DRIVER_VERSION ":" DRIVER_DESC);
	215	out:
	216	return retval;
	217	}
	218
	219	static void __exit kbtab_exit(void)
	220	{
	221	usb_deregister(&kbtab_driver);
	222	}
	223
	224	module_init(kbtab_init);
	225	module_exit(kbtab_exit);