drivers/input/joystick/cobra.c - linux-imx - Git at Google

 /*
  *  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);
	/*
	* 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);