[linux-2.6-block.git] / drivers / input / joystick / cobra.c

/*
 * $Id: cobra.c,v 1.19 2002/01/22 20:26:52 vojtech Exp $
 *
 *  Copyright (c) 1999-2001 Vojtech Pavlik
 */

/*
 * Creative Labs Blaster GamePad Cobra driver for Linux
 */

/*
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/gameport.h>
#include <linux/input.h>
#include <linux/jiffies.h>

#define DRIVER_DESC	"Creative Labs Blaster GamePad Cobra driver"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

#define COBRA_MAX_STROBE	45	/* 45 us max wait for first strobe */
#define COBRA_LENGTH		36

static int cobra_btn[] = { BTN_START, BTN_SELECT, BTN_TL, BTN_TR, BTN_X, BTN_Y, BTN_Z, BTN_A, BTN_B, BTN_C, BTN_TL2, BTN_TR2, 0 };

struct cobra {
	struct gameport *gameport;
	struct input_dev *dev[2];
	int reads;
	int bads;
	unsigned char exists;
	char phys[2][32];
};

static unsigned char cobra_read_packet(struct gameport *gameport, unsigned int *data)
{
	unsigned long flags;
	unsigned char u, v, w;
	__u64 buf[2];
	int r[2], t[2];
	int i, j, ret;

	int strobe = gameport_time(gameport, COBRA_MAX_STROBE);

	for (i = 0; i < 2; i++) {
		r[i] = buf[i] = 0;
		t[i] = COBRA_MAX_STROBE;
	}

	local_irq_save(flags);

	u = gameport_read(gameport);

	do {
		t[0]--; t[1]--;
		v = gameport_read(gameport);
		for (i = 0, w = u ^ v; i < 2 && w; i++, w >>= 2)
			if (w & 0x30) {
				if ((w & 0x30) < 0x30 && r[i] < COBRA_LENGTH && t[i] > 0) {
					buf[i] |= (__u64)((w >> 5) & 1) << r[i]++;
					t[i] = strobe;
					u = v;
				} else t[i] = 0;
			}
	} while (t[0] > 0 || t[1] > 0);

	local_irq_restore(flags);

	ret = 0;

	for (i = 0; i < 2; i++) {

		if (r[i] != COBRA_LENGTH) continue;

		for (j = 0; j < COBRA_LENGTH && (buf[i] & 0x04104107f) ^ 0x041041040; j++)
			buf[i] = (buf[i] >> 1) | ((__u64)(buf[i] & 1) << (COBRA_LENGTH - 1));

		if (j < COBRA_LENGTH) ret |= (1 << i);

		data[i] = ((buf[i] >>  7) & 0x000001f) | ((buf[i] >>  8) & 0x00003e0)
			| ((buf[i] >>  9) & 0x0007c00) | ((buf[i] >> 10) & 0x00f8000)
			| ((buf[i] >> 11) & 0x1f00000);

	}

	return ret;
}

static void cobra_poll(struct gameport *gameport)
{
	struct cobra *cobra = gameport_get_drvdata(gameport);
	struct input_dev *dev;
	unsigned int data[2];
	int i, j, r;

	cobra->reads++;

	if ((r = cobra_read_packet(gameport, data)) != cobra->exists) {
		cobra->bads++;
		return;
	}

	for (i = 0; i < 2; i++)
		if (cobra->exists & r & (1 << i)) {

			dev = cobra->dev[i];

			input_report_abs(dev, ABS_X, ((data[i] >> 4) & 1) - ((data[i] >> 3) & 1));
			input_report_abs(dev, ABS_Y, ((data[i] >> 2) & 1) - ((data[i] >> 1) & 1));

			for (j = 0; cobra_btn[j]; j++)
				input_report_key(dev, cobra_btn[j], data[i] & (0x20 << j));

			input_sync(dev);

		}
}

static int cobra_open(struct input_dev *dev)
{
	struct cobra *cobra = dev->private;

	gameport_start_polling(cobra->gameport);
	return 0;
}

static void cobra_close(struct input_dev *dev)
{
	struct cobra *cobra = dev->private;

	gameport_stop_polling(cobra->gameport);
}

static int cobra_connect(struct gameport *gameport, struct gameport_driver *drv)
{
	struct cobra *cobra;
	struct input_dev *input_dev;
	unsigned int data[2];
	int i, j;
	int err;

	cobra = kzalloc(sizeof(struct cobra), GFP_KERNEL);
	if (!cobra)
		return -ENOMEM;

	cobra->gameport = gameport;

	gameport_set_drvdata(gameport, cobra);

	err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
	if (err)
		goto fail1;

	cobra->exists = cobra_read_packet(gameport, data);

	for (i = 0; i < 2; i++)
		if ((cobra->exists >> i) & data[i] & 1) {
			printk(KERN_WARNING "cobra.c: Device %d on %s has the Ext bit set. ID is: %d"
				" Contact vojtech@ucw.cz\n", i, gameport->phys, (data[i] >> 2) & 7);
			cobra->exists &= ~(1 << i);
		}

	if (!cobra->exists) {
		err = -ENODEV;
		goto fail2;
	}

	gameport_set_poll_handler(gameport, cobra_poll);
	gameport_set_poll_interval(gameport, 20);

	for (i = 0; i < 2; i++) {
		if (~(cobra->exists >> i) & 1)
			continue;

		cobra->dev[i] = input_dev = input_allocate_device();
		if (!input_dev) {
			err = -ENOMEM;
			goto fail3;
		}

		snprintf(cobra->phys[i], sizeof(cobra->phys[i]),
			 "%s/input%d", gameport->phys, i);

		input_dev->name = "Creative Labs Blaster GamePad Cobra";
		input_dev->phys = cobra->phys[i];
		input_dev->id.bustype = BUS_GAMEPORT;
		input_dev->id.vendor = GAMEPORT_ID_VENDOR_CREATIVE;
		input_dev->id.product = 0x0008;
		input_dev->id.version = 0x0100;
		input_dev->cdev.dev = &gameport->dev;
		input_dev->private = cobra;

		input_dev->open = cobra_open;
		input_dev->close = cobra_close;

		input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
		input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
		input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
		for (j = 0; cobra_btn[j]; j++)
			set_bit(cobra_btn[j], input_dev->keybit);

		err = input_register_device(cobra->dev[i]);
		if (err)
			goto fail4;
	}

	return 0;

 fail4:	input_free_device(cobra->dev[i]);
 fail3:	while (--i >= 0)
		if (cobra->dev[i])
			input_unregister_device(cobra->dev[i]);
 fail2:	gameport_close(gameport);
 fail1:	gameport_set_drvdata(gameport, NULL);
	kfree(cobra);
	return err;
}

static void cobra_disconnect(struct gameport *gameport)
{
	struct cobra *cobra = gameport_get_drvdata(gameport);
	int i;

	for (i = 0; i < 2; i++)
		if ((cobra->exists >> i) & 1)
			input_unregister_device(cobra->dev[i]);
	gameport_close(gameport);
	gameport_set_drvdata(gameport, NULL);
	kfree(cobra);
}

static struct gameport_driver cobra_drv = {
	.driver		= {
		.name	= "cobra",
	},
	.description	= DRIVER_DESC,
	.connect	= cobra_connect,
	.disconnect	= cobra_disconnect,
};

static int __init cobra_init(void)
{
	gameport_register_driver(&cobra_drv);
	return 0;
}

static void __exit cobra_exit(void)
{
	gameport_unregister_driver(&cobra_drv);
}

module_init(cobra_init);
module_exit(cobra_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* $Id: cobra.c,v 1.19 2002/01/22 20:26:52 vojtech Exp $
	3	*
	4	* Copyright (c) 1999-2001 Vojtech Pavlik
	5	*/
	6
	7	/*
	8	* Creative Labs Blaster GamePad Cobra driver for Linux
	9	*/
	10
	11	/*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License as published by
	14	* the Free Software Foundation; either version 2 of the License, or
	15	* (at your option) any later version.
	16	*
	17	* This program is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	* GNU General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	25	*
	26	* Should you need to contact me, the author, you can do so either by
	27	* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
	28	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	29	*/
	30
	31	#include <linux/kernel.h>
	32	#include <linux/module.h>
	33	#include <linux/slab.h>
	34	#include <linux/init.h>
	35	#include <linux/gameport.h>
	36	#include <linux/input.h>
4e57b681	37	#include <linux/jiffies.h>
1da177e4 LT	38
	39	#define DRIVER_DESC "Creative Labs Blaster GamePad Cobra driver"
	40
	41	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	42	MODULE_DESCRIPTION(DRIVER_DESC);
	43	MODULE_LICENSE("GPL");
	44
	45	#define COBRA_MAX_STROBE 45 /* 45 us max wait for first strobe */
	46	#define COBRA_LENGTH 36
	47
1da177e4 LT	48	static int cobra_btn[] = { BTN_START, BTN_SELECT, BTN_TL, BTN_TR, BTN_X, BTN_Y, BTN_Z, BTN_A, BTN_B, BTN_C, BTN_TL2, BTN_TR2, 0 };
	49
	50	struct cobra {
	51	struct gameport *gameport;
17dd3f0f	52	struct input_dev *dev[2];
1da177e4 LT	53	int reads;
	54	int bads;
	55	unsigned char exists;
	56	char phys[2][32];
	57	};
	58
	59	static unsigned char cobra_read_packet(struct gameport gameport, unsigned int data)
	60	{
	61	unsigned long flags;
	62	unsigned char u, v, w;
	63	__u64 buf[2];
	64	int r[2], t[2];
	65	int i, j, ret;
	66
	67	int strobe = gameport_time(gameport, COBRA_MAX_STROBE);
	68
	69	for (i = 0; i < 2; i++) {
	70	r[i] = buf[i] = 0;
	71	t[i] = COBRA_MAX_STROBE;
	72	}
	73
	74	local_irq_save(flags);
	75
	76	u = gameport_read(gameport);
	77
	78	do {
	79	t[0]--; t[1]--;
	80	v = gameport_read(gameport);
	81	for (i = 0, w = u ^ v; i < 2 && w; i++, w >>= 2)
	82	if (w & 0x30) {
	83	if ((w & 0x30) < 0x30 && r[i] < COBRA_LENGTH && t[i] > 0) {
	84	buf[i] \|= (__u64)((w >> 5) & 1) << r[i]++;
	85	t[i] = strobe;
	86	u = v;
	87	} else t[i] = 0;
	88	}
	89	} while (t[0] > 0 \|\| t[1] > 0);
	90
	91	local_irq_restore(flags);
	92
	93	ret = 0;
	94
	95	for (i = 0; i < 2; i++) {
	96
	97	if (r[i] != COBRA_LENGTH) continue;
	98
	99	for (j = 0; j < COBRA_LENGTH && (buf[i] & 0x04104107f) ^ 0x041041040; j++)
	100	buf[i] = (buf[i] >> 1) \| ((__u64)(buf[i] & 1) << (COBRA_LENGTH - 1));
	101
	102	if (j < COBRA_LENGTH) ret \|= (1 << i);
	103
	104	data[i] = ((buf[i] >> 7) & 0x000001f) \| ((buf[i] >> 8) & 0x00003e0)
	105	\| ((buf[i] >> 9) & 0x0007c00) \| ((buf[i] >> 10) & 0x00f8000)
	106	\| ((buf[i] >> 11) & 0x1f00000);
	107
	108	}
	109
	110	return ret;
	111	}
	112
	113	static void cobra_poll(struct gameport *gameport)
	114	{
	115	struct cobra *cobra = gameport_get_drvdata(gameport);
	116	struct input_dev *dev;
117	unsigned int data[2];
118	int i, j, r;
119
120	cobra->reads++;
121
122	if ((r = cobra_read_packet(gameport, data)) != cobra->exists) {
123	cobra->bads++;
124	return;
125	}
126
127	for (i = 0; i < 2; i++)
128	if (cobra->exists & r & (1 << i)) {
129
17dd3f0f	130	dev = cobra->dev[i];
1da177e4 LT	131
	132	input_report_abs(dev, ABS_X, ((data[i] >> 4) & 1) - ((data[i] >> 3) & 1));
	133	input_report_abs(dev, ABS_Y, ((data[i] >> 2) & 1) - ((data[i] >> 1) & 1));
	134
	135	for (j = 0; cobra_btn[j]; j++)
	136	input_report_key(dev, cobra_btn[j], data[i] & (0x20 << j));
	137
	138	input_sync(dev);
	139
	140	}
	141	}
	142
	143	static int cobra_open(struct input_dev *dev)
	144	{
	145	struct cobra *cobra = dev->private;
	146
	147	gameport_start_polling(cobra->gameport);
	148	return 0;
	149	}
	150
	151	static void cobra_close(struct input_dev *dev)
	152	{
	153	struct cobra *cobra = dev->private;
	154
	155	gameport_stop_polling(cobra->gameport);
	156	}
	157
	158	static int cobra_connect(struct gameport gameport, struct gameport_driver drv)
	159	{
	160	struct cobra *cobra;
17dd3f0f	161	struct input_dev *input_dev;
1da177e4 LT	162	unsigned int data[2];
	163	int i, j;
	164	int err;
	165
17dd3f0f DT	166	cobra = kzalloc(sizeof(struct cobra), GFP_KERNEL);
17dd3f0f DT	167	if (!cobra)
1da177e4 LT	168	return -ENOMEM;
	169
	170	cobra->gameport = gameport;
	171
	172	gameport_set_drvdata(gameport, cobra);
	173
	174	err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
	175	if (err)
	176	goto fail1;
	177
	178	cobra->exists = cobra_read_packet(gameport, data);
	179
	180	for (i = 0; i < 2; i++)
	181	if ((cobra->exists >> i) & data[i] & 1) {
	182	printk(KERN_WARNING "cobra.c: Device %d on %s has the Ext bit set. ID is: %d"
	183	" Contact vojtech@ucw.cz\n", i, gameport->phys, (data[i] >> 2) & 7);
	184	cobra->exists &= ~(1 << i);
	185	}
	186
	187	if (!cobra->exists) {
	188	err = -ENODEV;
	189	goto fail2;
	190	}
	191
	192	gameport_set_poll_handler(gameport, cobra_poll);
	193	gameport_set_poll_interval(gameport, 20);
	194
17dd3f0f DT	195	for (i = 0; i < 2; i++) {
	196	if (~(cobra->exists >> i) & 1)
	197	continue;
1da177e4	198
17dd3f0f DT	199	cobra->dev[i] = input_dev = input_allocate_device();
	200	if (!input_dev) {
	201	err = -ENOMEM;
	202	goto fail3;
	203	}
1da177e4	204
10ca4c0a DT	205	snprintf(cobra->phys[i], sizeof(cobra->phys[i]),
10ca4c0a DT	206	"%s/input%d", gameport->phys, i);
1da177e4	207
17dd3f0f DT	208	input_dev->name = "Creative Labs Blaster GamePad Cobra";
	209	input_dev->phys = cobra->phys[i];
	210	input_dev->id.bustype = BUS_GAMEPORT;
	211	input_dev->id.vendor = GAMEPORT_ID_VENDOR_CREATIVE;
	212	input_dev->id.product = 0x0008;
	213	input_dev->id.version = 0x0100;
	214	input_dev->cdev.dev = &gameport->dev;
	215	input_dev->private = cobra;
1da177e4	216
17dd3f0f DT	217	input_dev->open = cobra_open;
17dd3f0f DT	218	input_dev->close = cobra_close;
1da177e4	219
17dd3f0f DT	220	input_dev->evbit[0] = BIT(EV_KEY) \| BIT(EV_ABS);
	221	input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
	222	input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
	223	for (j = 0; cobra_btn[j]; j++)
	224	set_bit(cobra_btn[j], input_dev->keybit);
1da177e4	225
127278ce DT	226	err = input_register_device(cobra->dev[i]);
	227	if (err)
	228	goto fail4;
17dd3f0f	229	}
1da177e4 LT	230
	231	return 0;
	232
127278ce DT	233	fail4: input_free_device(cobra->dev[i]);
127278ce DT	234	fail3: while (--i >= 0)
17dd3f0f DT	235	if (cobra->dev[i])
	236	input_unregister_device(cobra->dev[i]);
	237	fail2: gameport_close(gameport);
	238	fail1: gameport_set_drvdata(gameport, NULL);
1da177e4 LT	239	kfree(cobra);
	240	return err;
	241	}
	242
	243	static void cobra_disconnect(struct gameport *gameport)
	244	{
	245	struct cobra *cobra = gameport_get_drvdata(gameport);
	246	int i;
	247
	248	for (i = 0; i < 2; i++)
	249	if ((cobra->exists >> i) & 1)
17dd3f0f	250	input_unregister_device(cobra->dev[i]);
1da177e4 LT	251	gameport_close(gameport);
	252	gameport_set_drvdata(gameport, NULL);
	253	kfree(cobra);
	254	}
	255
	256	static struct gameport_driver cobra_drv = {
	257	.driver = {
	258	.name = "cobra",
	259	},
	260	.description = DRIVER_DESC,
	261	.connect = cobra_connect,
	262	.disconnect = cobra_disconnect,
	263	};
	264
	265	static int __init cobra_init(void)
	266	{
	267	gameport_register_driver(&cobra_drv);
	268	return 0;
	269	}
	270
	271	static void __exit cobra_exit(void)
	272	{
	273	gameport_unregister_driver(&cobra_drv);
	274	}
	275
	276	module_init(cobra_init);
	277	module_exit(cobra_exit);