[mirror_ubuntu-artful-kernel.git] / drivers / input / joystick / cobra.c

/*
 *  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/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 = input_get_drvdata(dev);

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

static void cobra_close(struct input_dev *dev)
{
	struct cobra *cobra = input_get_drvdata(dev);

	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->dev.parent = &gameport->dev;

		input_set_drvdata(input_dev, cobra);

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

		input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(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,
};

module_gameport_driver(cobra_drv);
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* Copyright (c) 1999-2001 Vojtech Pavlik
	3	*/
	4
	5	/*
	6	* Creative Labs Blaster GamePad Cobra driver for Linux
	7	*/
	8
	9	/*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	23	*
	24	* Should you need to contact me, the author, you can do so either by
	25	* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
	26	* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
	27	*/
	28
	29	#include <linux/kernel.h>
	30	#include <linux/module.h>
	31	#include <linux/slab.h>
1da177e4 LT	32	#include <linux/gameport.h>
1da177e4 LT	33	#include <linux/input.h>
4e57b681	34	#include <linux/jiffies.h>
1da177e4 LT	35
	36	#define DRIVER_DESC "Creative Labs Blaster GamePad Cobra driver"
	37
	38	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	39	MODULE_DESCRIPTION(DRIVER_DESC);
	40	MODULE_LICENSE("GPL");
	41
	42	#define COBRA_MAX_STROBE 45 /* 45 us max wait for first strobe */
	43	#define COBRA_LENGTH 36
	44
1da177e4 LT	45	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 };
	46
	47	struct cobra {
	48	struct gameport *gameport;
17dd3f0f	49	struct input_dev *dev[2];
1da177e4 LT	50	int reads;
	51	int bads;
	52	unsigned char exists;
	53	char phys[2][32];
	54	};
	55
	56	static unsigned char cobra_read_packet(struct gameport gameport, unsigned int data)
	57	{
	58	unsigned long flags;
	59	unsigned char u, v, w;
	60	__u64 buf[2];
	61	int r[2], t[2];
	62	int i, j, ret;
	63
	64	int strobe = gameport_time(gameport, COBRA_MAX_STROBE);
	65
	66	for (i = 0; i < 2; i++) {
	67	r[i] = buf[i] = 0;
	68	t[i] = COBRA_MAX_STROBE;
	69	}
	70
	71	local_irq_save(flags);
	72
	73	u = gameport_read(gameport);
	74
	75	do {
	76	t[0]--; t[1]--;
	77	v = gameport_read(gameport);
	78	for (i = 0, w = u ^ v; i < 2 && w; i++, w >>= 2)
	79	if (w & 0x30) {
	80	if ((w & 0x30) < 0x30 && r[i] < COBRA_LENGTH && t[i] > 0) {
	81	buf[i] \|= (__u64)((w >> 5) & 1) << r[i]++;
	82	t[i] = strobe;
	83	u = v;
	84	} else t[i] = 0;
	85	}
	86	} while (t[0] > 0 \|\| t[1] > 0);
	87
	88	local_irq_restore(flags);
	89
	90	ret = 0;
	91
	92	for (i = 0; i < 2; i++) {
	93
	94	if (r[i] != COBRA_LENGTH) continue;
	95
	96	for (j = 0; j < COBRA_LENGTH && (buf[i] & 0x04104107f) ^ 0x041041040; j++)
	97	buf[i] = (buf[i] >> 1) \| ((__u64)(buf[i] & 1) << (COBRA_LENGTH - 1));
	98
	99	if (j < COBRA_LENGTH) ret \|= (1 << i);
	100
	101	data[i] = ((buf[i] >> 7) & 0x000001f) \| ((buf[i] >> 8) & 0x00003e0)
	102	\| ((buf[i] >> 9) & 0x0007c00) \| ((buf[i] >> 10) & 0x00f8000)
	103	\| ((buf[i] >> 11) & 0x1f00000);
	104
	105	}
	106
	107	return ret;
	108	}
	109
	110	static void cobra_poll(struct gameport *gameport)
	111	{
	112	struct cobra *cobra = gameport_get_drvdata(gameport);
	113	struct input_dev *dev;
114	unsigned int data[2];
115	int i, j, r;
116
117	cobra->reads++;
118
119	if ((r = cobra_read_packet(gameport, data)) != cobra->exists) {
120	cobra->bads++;
121	return;
122	}
123
124	for (i = 0; i < 2; i++)
125	if (cobra->exists & r & (1 << i)) {
126
17dd3f0f	127	dev = cobra->dev[i];
1da177e4 LT	128
	129	input_report_abs(dev, ABS_X, ((data[i] >> 4) & 1) - ((data[i] >> 3) & 1));
	130	input_report_abs(dev, ABS_Y, ((data[i] >> 2) & 1) - ((data[i] >> 1) & 1));
	131
	132	for (j = 0; cobra_btn[j]; j++)
	133	input_report_key(dev, cobra_btn[j], data[i] & (0x20 << j));
	134
	135	input_sync(dev);
	136
	137	}
	138	}
	139
	140	static int cobra_open(struct input_dev *dev)
	141	{
8715c1cf	142	struct cobra *cobra = input_get_drvdata(dev);
1da177e4 LT	143
	144	gameport_start_polling(cobra->gameport);
	145	return 0;
	146	}
	147
	148	static void cobra_close(struct input_dev *dev)
	149	{
8715c1cf	150	struct cobra *cobra = input_get_drvdata(dev);
1da177e4 LT	151
	152	gameport_stop_polling(cobra->gameport);
	153	}
	154
	155	static int cobra_connect(struct gameport gameport, struct gameport_driver drv)
	156	{
	157	struct cobra *cobra;
17dd3f0f	158	struct input_dev *input_dev;
1da177e4 LT	159	unsigned int data[2];
	160	int i, j;
	161	int err;
	162
17dd3f0f DT	163	cobra = kzalloc(sizeof(struct cobra), GFP_KERNEL);
17dd3f0f DT	164	if (!cobra)
1da177e4 LT	165	return -ENOMEM;
	166
	167	cobra->gameport = gameport;
	168
	169	gameport_set_drvdata(gameport, cobra);
	170
	171	err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
	172	if (err)
	173	goto fail1;
	174
	175	cobra->exists = cobra_read_packet(gameport, data);
	176
	177	for (i = 0; i < 2; i++)
	178	if ((cobra->exists >> i) & data[i] & 1) {
	179	printk(KERN_WARNING "cobra.c: Device %d on %s has the Ext bit set. ID is: %d"
	180	" Contact vojtech@ucw.cz\n", i, gameport->phys, (data[i] >> 2) & 7);
	181	cobra->exists &= ~(1 << i);
	182	}
	183
	184	if (!cobra->exists) {
	185	err = -ENODEV;
	186	goto fail2;
	187	}
	188
	189	gameport_set_poll_handler(gameport, cobra_poll);
	190	gameport_set_poll_interval(gameport, 20);
	191
17dd3f0f DT	192	for (i = 0; i < 2; i++) {
	193	if (~(cobra->exists >> i) & 1)
	194	continue;
1da177e4	195
17dd3f0f DT	196	cobra->dev[i] = input_dev = input_allocate_device();
	197	if (!input_dev) {
	198	err = -ENOMEM;
	199	goto fail3;
	200	}
1da177e4	201
10ca4c0a DT	202	snprintf(cobra->phys[i], sizeof(cobra->phys[i]),
10ca4c0a DT	203	"%s/input%d", gameport->phys, i);
1da177e4	204
17dd3f0f DT	205	input_dev->name = "Creative Labs Blaster GamePad Cobra";
	206	input_dev->phys = cobra->phys[i];
	207	input_dev->id.bustype = BUS_GAMEPORT;
	208	input_dev->id.vendor = GAMEPORT_ID_VENDOR_CREATIVE;
	209	input_dev->id.product = 0x0008;
	210	input_dev->id.version = 0x0100;
935e658e	211	input_dev->dev.parent = &gameport->dev;
8715c1cf DT	212
8715c1cf DT	213	input_set_drvdata(input_dev, cobra);
1da177e4	214
17dd3f0f DT	215	input_dev->open = cobra_open;
17dd3f0f DT	216	input_dev->close = cobra_close;
1da177e4	217
7b19ada2	218	input_dev->evbit[0] = BIT_MASK(EV_KEY) \| BIT_MASK(EV_ABS);
17dd3f0f DT	219	input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
	220	input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
	221	for (j = 0; cobra_btn[j]; j++)
	222	set_bit(cobra_btn[j], input_dev->keybit);
1da177e4	223
127278ce DT	224	err = input_register_device(cobra->dev[i]);
	225	if (err)
	226	goto fail4;
17dd3f0f	227	}
1da177e4 LT	228
	229	return 0;
	230
127278ce DT	231	fail4: input_free_device(cobra->dev[i]);
127278ce DT	232	fail3: while (--i >= 0)
17dd3f0f DT	233	if (cobra->dev[i])
	234	input_unregister_device(cobra->dev[i]);
	235	fail2: gameport_close(gameport);
	236	fail1: gameport_set_drvdata(gameport, NULL);
1da177e4 LT	237	kfree(cobra);
	238	return err;
	239	}
	240
	241	static void cobra_disconnect(struct gameport *gameport)
	242	{
	243	struct cobra *cobra = gameport_get_drvdata(gameport);
	244	int i;
	245
	246	for (i = 0; i < 2; i++)
	247	if ((cobra->exists >> i) & 1)
17dd3f0f	248	input_unregister_device(cobra->dev[i]);
1da177e4 LT	249	gameport_close(gameport);
	250	gameport_set_drvdata(gameport, NULL);
	251	kfree(cobra);
	252	}
	253
	254	static struct gameport_driver cobra_drv = {
	255	.driver = {
	256	.name = "cobra",
	257	},
	258	.description = DRIVER_DESC,
	259	.connect = cobra_connect,
	260	.disconnect = cobra_disconnect,
	261	};
	262
98a84131	263	module_gameport_driver(cobra_drv);