drivers/input/gameport/lightning.c - kernel/msm-4.9 - Gitiles

 /*
  *  Copyright (c) 1998-2001 Vojtech Pavlik
  */

 /*
  * PDPI Lightning 4 gamecard 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 <asm/io.h>
 #include <linux/delay.h>
 #include <linux/errno.h>
 #include <linux/ioport.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/gameport.h>

 #define L4_PORT			0x201
 #define L4_SELECT_ANALOG	0xa4
 #define L4_SELECT_DIGITAL	0xa5
 #define L4_SELECT_SECONDARY	0xa6
 #define L4_CMD_ID		0x80
 #define L4_CMD_GETCAL		0x92
 #define L4_CMD_SETCAL		0x93
 #define L4_ID			0x04
 #define L4_BUSY			0x01
 #define L4_TIMEOUT		80	/* 80 us */

 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 MODULE_DESCRIPTION("PDPI Lightning 4 gamecard driver");
 MODULE_LICENSE("GPL");

 struct l4 {
 	struct gameport *gameport;
 	unsigned char port;
 };

 static struct l4 l4_ports[8];

 /*
  * l4_wait_ready() waits for the L4 to become ready.
  */

 static int l4_wait_ready(void)
 {
 	unsigned int t = L4_TIMEOUT;

 	while ((inb(L4_PORT) & L4_BUSY) && t > 0) t--;
 	return -(t <= 0);
 }

 /*
  * l4_cooked_read() reads data from the Lightning 4.
  */

 static int l4_cooked_read(struct gameport *gameport, int *axes, int *buttons)
 {
 	struct l4 *l4 = gameport->port_data;
 	unsigned char status;
 	int i, result = -1;

 	outb(L4_SELECT_ANALOG, L4_PORT);
 	outb(L4_SELECT_DIGITAL + (l4->port >> 2), L4_PORT);

 	if (inb(L4_PORT) & L4_BUSY) goto fail;
 	outb(l4->port & 3, L4_PORT);

 	if (l4_wait_ready()) goto fail;
 	status = inb(L4_PORT);

 	for (i = 0; i < 4; i++)
 		if (status & (1 << i)) {
 			if (l4_wait_ready()) goto fail;
 			axes[i] = inb(L4_PORT);
 			if (axes[i] > 252) axes[i] = -1;
 		}

 	if (status & 0x10) {
 		if (l4_wait_ready()) goto fail;
 		*buttons = inb(L4_PORT) & 0x0f;
 	}

 	result = 0;

 fail:	outb(L4_SELECT_ANALOG, L4_PORT);
 	return result;
 }

 static int l4_open(struct gameport *gameport, int mode)
 {
 	struct l4 *l4 = gameport->port_data;

         if (l4->port != 0 && mode != GAMEPORT_MODE_COOKED)
 		return -1;
 	outb(L4_SELECT_ANALOG, L4_PORT);
 	return 0;
 }

 /*
  * l4_getcal() reads the L4 with calibration values.
  */

 static int l4_getcal(int port, int *cal)
 {
 	int i, result = -1;

 	outb(L4_SELECT_ANALOG, L4_PORT);
 	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
 	if (inb(L4_PORT) & L4_BUSY)
 		goto out;

 	outb(L4_CMD_GETCAL, L4_PORT);
 	if (l4_wait_ready())
 		goto out;

 	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
 		goto out;

 	if (l4_wait_ready())
 		goto out;
         outb(port & 3, L4_PORT);

 	for (i = 0; i < 4; i++) {
 		if (l4_wait_ready())
 			goto out;
 		cal[i] = inb(L4_PORT);
 	}

 	result = 0;

 out:	outb(L4_SELECT_ANALOG, L4_PORT);
 	return result;
 }

 /*
  * l4_setcal() programs the L4 with calibration values.
  */

 static int l4_setcal(int port, int *cal)
 {
 	int i, result = -1;

 	outb(L4_SELECT_ANALOG, L4_PORT);
 	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
 	if (inb(L4_PORT) & L4_BUSY)
 		goto out;

 	outb(L4_CMD_SETCAL, L4_PORT);
 	if (l4_wait_ready())
 		goto out;

 	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
 		goto out;

 	if (l4_wait_ready())
 		goto out;
         outb(port & 3, L4_PORT);

 	for (i = 0; i < 4; i++) {
 		if (l4_wait_ready())
 			goto out;
 		outb(cal[i], L4_PORT);
 	}

 	result = 0;

 out:	outb(L4_SELECT_ANALOG, L4_PORT);
 	return result;
 }

 /*
  * l4_calibrate() calibrates the L4 for the attached device, so
  * that the device's resistance fits into the L4's 8-bit range.
  */

 static int l4_calibrate(struct gameport *gameport, int *axes, int *max)
 {
 	int i, t;
 	int cal[4];
 	struct l4 *l4 = gameport->port_data;

 	if (l4_getcal(l4->port, cal))
 		return -1;

 	for (i = 0; i < 4; i++) {
 		t = (max[i] * cal[i]) / 200;
 		t = (t < 1) ? 1 : ((t > 255) ? 255 : t);
 		axes[i] = (axes[i] < 0) ? -1 : (axes[i] * cal[i]) / t;
 		axes[i] = (axes[i] > 252) ? 252 : axes[i];
 		cal[i] = t;
 	}

 	if (l4_setcal(l4->port, cal))
 		return -1;

 	return 0;
 }

 static int __init l4_create_ports(int card_no)
 {
 	struct l4 *l4;
 	struct gameport *port;
 	int i, idx;

 	for (i = 0; i < 4; i++) {

 		idx = card_no * 4 + i;
 		l4 = &l4_ports[idx];

 		if (!(l4->gameport = port = gameport_allocate_port())) {
 			printk(KERN_ERR "lightning: Memory allocation failed\n");
 			while (--i >= 0) {
 				gameport_free_port(l4->gameport);
 				l4->gameport = NULL;
 			}
 			return -ENOMEM;
 		}
 		l4->port = idx;

 		port->port_data = l4;
 		port->open = l4_open;
 		port->cooked_read = l4_cooked_read;
 		port->calibrate = l4_calibrate;

 		gameport_set_name(port, "PDPI Lightning 4");
 		gameport_set_phys(port, "isa%04x/gameport%d", L4_PORT, idx);

 		if (idx == 0)
 			port->io = L4_PORT;
 	}

 	return 0;
 }

 static int __init l4_add_card(int card_no)
 {
 	int cal[4] = { 255, 255, 255, 255 };
 	int i, rev, result;
 	struct l4 *l4;

 	outb(L4_SELECT_ANALOG, L4_PORT);
 	outb(L4_SELECT_DIGITAL + card_no, L4_PORT);

 	if (inb(L4_PORT) & L4_BUSY)
 		return -1;
 	outb(L4_CMD_ID, L4_PORT);

 	if (l4_wait_ready())
 		return -1;

 	if (inb(L4_PORT) != L4_SELECT_DIGITAL + card_no)
 		return -1;

 	if (l4_wait_ready())
 		return -1;
 	if (inb(L4_PORT) != L4_ID)
 		return -1;

 	if (l4_wait_ready())
 		return -1;
 	rev = inb(L4_PORT);

 	if (!rev)
 		return -1;

 	result = l4_create_ports(card_no);
 	if (result)
 		return result;

 	printk(KERN_INFO "gameport: PDPI Lightning 4 %s card v%d.%d at %#x\n",
 		card_no ? "secondary" : "primary", rev >> 4, rev, L4_PORT);

 	for (i = 0; i < 4; i++) {
 		l4 = &l4_ports[card_no * 4 + i];

 		if (rev > 0x28)		/* on 2.9+ the setcal command works correctly */
 			l4_setcal(l4->port, cal);
 		gameport_register_port(l4->gameport);
 	}

 	return 0;
 }

 static int __init l4_init(void)
 {
 	int i, cards = 0;

 	if (!request_region(L4_PORT, 1, "lightning"))
 		return -EBUSY;

 	for (i = 0; i < 2; i++)
 		if (l4_add_card(i) == 0)
 			cards++;

 	outb(L4_SELECT_ANALOG, L4_PORT);

 	if (!cards) {
 		release_region(L4_PORT, 1);
 		return -ENODEV;
 	}

 	return 0;
 }

 static void __exit l4_exit(void)
 {
 	int i;
 	int cal[4] = { 59, 59, 59, 59 };

 	for (i = 0; i < 8; i++)
 		if (l4_ports[i].gameport) {
 			l4_setcal(l4_ports[i].port, cal);
 			gameport_unregister_port(l4_ports[i].gameport);
 		}

 	outb(L4_SELECT_ANALOG, L4_PORT);
 	release_region(L4_PORT, 1);
 }

 module_init(l4_init);
 module_exit(l4_exit);
	/*
	* Copyright (c) 1998-2001 Vojtech Pavlik
	*/

	/*
	* PDPI Lightning 4 gamecard 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 <asm/io.h>
	#include <linux/delay.h>
	#include <linux/errno.h>
	#include <linux/ioport.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/gameport.h>

	#define L4_PORT 0x201
	#define L4_SELECT_ANALOG 0xa4
	#define L4_SELECT_DIGITAL 0xa5
	#define L4_SELECT_SECONDARY 0xa6
	#define L4_CMD_ID 0x80
	#define L4_CMD_GETCAL 0x92
	#define L4_CMD_SETCAL 0x93
	#define L4_ID 0x04
	#define L4_BUSY 0x01
	#define L4_TIMEOUT 80 /* 80 us */

	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	MODULE_DESCRIPTION("PDPI Lightning 4 gamecard driver");
	MODULE_LICENSE("GPL");

	struct l4 {
	struct gameport *gameport;
	unsigned char port;
	};

	static struct l4 l4_ports[8];

	/*
	* l4_wait_ready() waits for the L4 to become ready.
	*/

	static int l4_wait_ready(void)
	{
	unsigned int t = L4_TIMEOUT;

	while ((inb(L4_PORT) & L4_BUSY) && t > 0) t--;
	return -(t <= 0);
	}

	/*
	* l4_cooked_read() reads data from the Lightning 4.
	*/

	static int l4_cooked_read(struct gameport gameport, int axes, int *buttons)
	{
	struct l4 *l4 = gameport->port_data;
	unsigned char status;
	int i, result = -1;

	outb(L4_SELECT_ANALOG, L4_PORT);
	outb(L4_SELECT_DIGITAL + (l4->port >> 2), L4_PORT);

	if (inb(L4_PORT) & L4_BUSY) goto fail;
	outb(l4->port & 3, L4_PORT);

	if (l4_wait_ready()) goto fail;
	status = inb(L4_PORT);

	for (i = 0; i < 4; i++)
	if (status & (1 << i)) {
	if (l4_wait_ready()) goto fail;
	axes[i] = inb(L4_PORT);
	if (axes[i] > 252) axes[i] = -1;
	}

	if (status & 0x10) {
	if (l4_wait_ready()) goto fail;
	*buttons = inb(L4_PORT) & 0x0f;
	}

	result = 0;

	fail: outb(L4_SELECT_ANALOG, L4_PORT);
	return result;
	}

	static int l4_open(struct gameport *gameport, int mode)
	{
	struct l4 *l4 = gameport->port_data;

	if (l4->port != 0 && mode != GAMEPORT_MODE_COOKED)
	return -1;
	outb(L4_SELECT_ANALOG, L4_PORT);
	return 0;
	}

	/*
	* l4_getcal() reads the L4 with calibration values.
	*/

	static int l4_getcal(int port, int *cal)
	{
	int i, result = -1;

	outb(L4_SELECT_ANALOG, L4_PORT);
	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
	if (inb(L4_PORT) & L4_BUSY)
	goto out;

	outb(L4_CMD_GETCAL, L4_PORT);
	if (l4_wait_ready())
	goto out;

	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
	goto out;

	if (l4_wait_ready())
	goto out;
	outb(port & 3, L4_PORT);

	for (i = 0; i < 4; i++) {
	if (l4_wait_ready())
	goto out;
	cal[i] = inb(L4_PORT);
	}

	result = 0;

	out: outb(L4_SELECT_ANALOG, L4_PORT);
	return result;
	}

	/*
	* l4_setcal() programs the L4 with calibration values.
	*/

	static int l4_setcal(int port, int *cal)
	{
	int i, result = -1;

	outb(L4_SELECT_ANALOG, L4_PORT);
	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
	if (inb(L4_PORT) & L4_BUSY)
	goto out;

	outb(L4_CMD_SETCAL, L4_PORT);
	if (l4_wait_ready())
	goto out;

	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
	goto out;

	if (l4_wait_ready())
	goto out;
	outb(port & 3, L4_PORT);

	for (i = 0; i < 4; i++) {
	if (l4_wait_ready())
	goto out;
	outb(cal[i], L4_PORT);
	}

	result = 0;

	out: outb(L4_SELECT_ANALOG, L4_PORT);
	return result;
	}

	/*
	* l4_calibrate() calibrates the L4 for the attached device, so
	* that the device's resistance fits into the L4's 8-bit range.
	*/

	static int l4_calibrate(struct gameport gameport, int axes, int *max)
	{
	int i, t;
	int cal[4];
	struct l4 *l4 = gameport->port_data;

	if (l4_getcal(l4->port, cal))
	return -1;

	for (i = 0; i < 4; i++) {
	t = (max[i] * cal[i]) / 200;
	t = (t < 1) ? 1 : ((t > 255) ? 255 : t);
	axes[i] = (axes[i] < 0) ? -1 : (axes[i] * cal[i]) / t;
	axes[i] = (axes[i] > 252) ? 252 : axes[i];
	cal[i] = t;
	}

	if (l4_setcal(l4->port, cal))
	return -1;

	return 0;
	}

	static int __init l4_create_ports(int card_no)
	{
	struct l4 *l4;
	struct gameport *port;
	int i, idx;

	for (i = 0; i < 4; i++) {

	idx = card_no * 4 + i;
	l4 = &l4_ports[idx];

	if (!(l4->gameport = port = gameport_allocate_port())) {
	printk(KERN_ERR "lightning: Memory allocation failed\n");
	while (--i >= 0) {
	gameport_free_port(l4->gameport);
	l4->gameport = NULL;
	}
	return -ENOMEM;
	}
	l4->port = idx;

	port->port_data = l4;
	port->open = l4_open;
	port->cooked_read = l4_cooked_read;
	port->calibrate = l4_calibrate;

	gameport_set_name(port, "PDPI Lightning 4");
	gameport_set_phys(port, "isa%04x/gameport%d", L4_PORT, idx);

	if (idx == 0)
	port->io = L4_PORT;
	}

	return 0;
	}

	static int __init l4_add_card(int card_no)
	{
	int cal[4] = { 255, 255, 255, 255 };
	int i, rev, result;
	struct l4 *l4;

	outb(L4_SELECT_ANALOG, L4_PORT);
	outb(L4_SELECT_DIGITAL + card_no, L4_PORT);

	if (inb(L4_PORT) & L4_BUSY)
	return -1;
	outb(L4_CMD_ID, L4_PORT);

	if (l4_wait_ready())
	return -1;

	if (inb(L4_PORT) != L4_SELECT_DIGITAL + card_no)
	return -1;

	if (l4_wait_ready())
	return -1;
	if (inb(L4_PORT) != L4_ID)
	return -1;

	if (l4_wait_ready())
	return -1;
	rev = inb(L4_PORT);

	if (!rev)
	return -1;

	result = l4_create_ports(card_no);
	if (result)
	return result;

	printk(KERN_INFO "gameport: PDPI Lightning 4 %s card v%d.%d at %#x\n",
	card_no ? "secondary" : "primary", rev >> 4, rev, L4_PORT);

	for (i = 0; i < 4; i++) {
	l4 = &l4_ports[card_no * 4 + i];

	if (rev > 0x28) /* on 2.9+ the setcal command works correctly */
	l4_setcal(l4->port, cal);
	gameport_register_port(l4->gameport);
	}

	return 0;
	}

	static int __init l4_init(void)
	{
	int i, cards = 0;

	if (!request_region(L4_PORT, 1, "lightning"))
	return -EBUSY;

	for (i = 0; i < 2; i++)
	if (l4_add_card(i) == 0)
	cards++;

	outb(L4_SELECT_ANALOG, L4_PORT);

	if (!cards) {
	release_region(L4_PORT, 1);
	return -ENODEV;
	}

	return 0;
	}

	static void __exit l4_exit(void)
	{
	int i;
	int cal[4] = { 59, 59, 59, 59 };

	for (i = 0; i < 8; i++)
	if (l4_ports[i].gameport) {
	l4_setcal(l4_ports[i].port, cal);
	gameport_unregister_port(l4_ports[i].gameport);
	}

	outb(L4_SELECT_ANALOG, L4_PORT);
	release_region(L4_PORT, 1);
	}

	module_init(l4_init);
	module_exit(l4_exit);