[linux-2.6] / drivers / input / gameport / lightning.c

/*
 *  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>
#include <linux/slab.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);
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* Copyright (c) 1998-2001 Vojtech Pavlik
	3	*/
	4
	5	/*
	6	* PDPI Lightning 4 gamecard 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 <asm/io.h>
	30	#include <linux/delay.h>
	31	#include <linux/errno.h>
	32	#include <linux/ioport.h>
	33	#include <linux/kernel.h>
	34	#include <linux/module.h>
	35	#include <linux/init.h>
	36	#include <linux/gameport.h>
	37	#include <linux/slab.h>
	38
	39	#define L4_PORT 0x201
	40	#define L4_SELECT_ANALOG 0xa4
	41	#define L4_SELECT_DIGITAL 0xa5
	42	#define L4_SELECT_SECONDARY 0xa6
	43	#define L4_CMD_ID 0x80
	44	#define L4_CMD_GETCAL 0x92
	45	#define L4_CMD_SETCAL 0x93
	46	#define L4_ID 0x04
	47	#define L4_BUSY 0x01
	48	#define L4_TIMEOUT 80 /* 80 us */
	49
	50	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	51	MODULE_DESCRIPTION("PDPI Lightning 4 gamecard driver");
	52	MODULE_LICENSE("GPL");
	53
	54	struct l4 {
	55	struct gameport *gameport;
	56	unsigned char port;
	57	};
	58
	59	static struct l4 l4_ports[8];
	60
	61	/*
	62	* l4_wait_ready() waits for the L4 to become ready.
	63	*/
	64
	65	static int l4_wait_ready(void)
66	{
67	unsigned int t = L4_TIMEOUT;
68
69	while ((inb(L4_PORT) & L4_BUSY) && t > 0) t--;
70	return -(t <= 0);
71	}
72
73	/*
74	* l4_cooked_read() reads data from the Lightning 4.
75	*/
76
77	static int l4_cooked_read(struct gameport gameport, int axes, int *buttons)
78	{
79	struct l4 *l4 = gameport->port_data;
80	unsigned char status;
81	int i, result = -1;
82
83	outb(L4_SELECT_ANALOG, L4_PORT);
84	outb(L4_SELECT_DIGITAL + (l4->port >> 2), L4_PORT);
85
86	if (inb(L4_PORT) & L4_BUSY) goto fail;
87	outb(l4->port & 3, L4_PORT);
88
89	if (l4_wait_ready()) goto fail;
90	status = inb(L4_PORT);
91
92	for (i = 0; i < 4; i++)
93	if (status & (1 << i)) {
94	if (l4_wait_ready()) goto fail;
95	axes[i] = inb(L4_PORT);
96	if (axes[i] > 252) axes[i] = -1;
97	}
98
99	if (status & 0x10) {
100	if (l4_wait_ready()) goto fail;
101	*buttons = inb(L4_PORT) & 0x0f;
102	}
103
104	result = 0;
105
106	fail: outb(L4_SELECT_ANALOG, L4_PORT);
107	return result;
108	}
109
110	static int l4_open(struct gameport *gameport, int mode)
111	{
112	struct l4 *l4 = gameport->port_data;
113
114	if (l4->port != 0 && mode != GAMEPORT_MODE_COOKED)
115	return -1;
116	outb(L4_SELECT_ANALOG, L4_PORT);
117	return 0;
118	}
119
120	/*
121	* l4_getcal() reads the L4 with calibration values.
122	*/
123
124	static int l4_getcal(int port, int *cal)
125	{
126	int i, result = -1;
127
128	outb(L4_SELECT_ANALOG, L4_PORT);
129	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
130	if (inb(L4_PORT) & L4_BUSY)
131	goto out;
132
133	outb(L4_CMD_GETCAL, L4_PORT);
134	if (l4_wait_ready())
135	goto out;
136
137	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
138	goto out;
139
140	if (l4_wait_ready())
141	goto out;
142	outb(port & 3, L4_PORT);
143
144	for (i = 0; i < 4; i++) {
145	if (l4_wait_ready())
146	goto out;
147	cal[i] = inb(L4_PORT);
148	}
149
150	result = 0;
151
152	out: outb(L4_SELECT_ANALOG, L4_PORT);
153	return result;
154	}
155
156	/*
157	* l4_setcal() programs the L4 with calibration values.
158	*/
159
160	static int l4_setcal(int port, int *cal)
161	{
162	int i, result = -1;
163
164	outb(L4_SELECT_ANALOG, L4_PORT);
165	outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
166	if (inb(L4_PORT) & L4_BUSY)
167	goto out;
168
169	outb(L4_CMD_SETCAL, L4_PORT);
170	if (l4_wait_ready())
171	goto out;
172
173	if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
174	goto out;
175
176	if (l4_wait_ready())
177	goto out;
178	outb(port & 3, L4_PORT);
179
180	for (i = 0; i < 4; i++) {
181	if (l4_wait_ready())
182	goto out;
183	outb(cal[i], L4_PORT);
184	}
185
186	result = 0;
187
188	out: outb(L4_SELECT_ANALOG, L4_PORT);
189	return result;
190	}
191
192	/*
193	* l4_calibrate() calibrates the L4 for the attached device, so
194	* that the device's resistance fits into the L4's 8-bit range.
195	*/
196
197	static int l4_calibrate(struct gameport gameport, int axes, int *max)
198	{
199	int i, t;
200	int cal[4];
201	struct l4 *l4 = gameport->port_data;
202
203	if (l4_getcal(l4->port, cal))
204	return -1;
205
206	for (i = 0; i < 4; i++) {
207	t = (max[i] * cal[i]) / 200;
208	t = (t < 1) ? 1 : ((t > 255) ? 255 : t);
209	axes[i] = (axes[i] < 0) ? -1 : (axes[i] * cal[i]) / t;
210	axes[i] = (axes[i] > 252) ? 252 : axes[i];
211	cal[i] = t;
212	}
213
214	if (l4_setcal(l4->port, cal))
215	return -1;
216
217	return 0;
218	}
219
220	static int __init l4_create_ports(int card_no)
221	{
222	struct l4 *l4;
223	struct gameport *port;
224	int i, idx;
225
226	for (i = 0; i < 4; i++) {
227
228	idx = card_no * 4 + i;
229	l4 = &l4_ports[idx];
230
231	if (!(l4->gameport = port = gameport_allocate_port())) {
232	printk(KERN_ERR "lightning: Memory allocation failed\n");
233	while (--i >= 0) {
234	gameport_free_port(l4->gameport);
235	l4->gameport = NULL;
236	}
237	return -ENOMEM;
238	}
239	l4->port = idx;
240
241	port->port_data = l4;
242	port->open = l4_open;
243	port->cooked_read = l4_cooked_read;
244	port->calibrate = l4_calibrate;
245
246	gameport_set_name(port, "PDPI Lightning 4");
247	gameport_set_phys(port, "isa%04x/gameport%d", L4_PORT, idx);
248
249	if (idx == 0)
250	port->io = L4_PORT;
251	}
252
253	return 0;
254	}
255
256	static int __init l4_add_card(int card_no)
257	{
258	int cal[4] = { 255, 255, 255, 255 };
259	int i, rev, result;
260	struct l4 *l4;
261
262	outb(L4_SELECT_ANALOG, L4_PORT);
263	outb(L4_SELECT_DIGITAL + card_no, L4_PORT);
264
265	if (inb(L4_PORT) & L4_BUSY)
266	return -1;
267	outb(L4_CMD_ID, L4_PORT);
268
269	if (l4_wait_ready())
270	return -1;
271
272	if (inb(L4_PORT) != L4_SELECT_DIGITAL + card_no)
273	return -1;
274
275	if (l4_wait_ready())
276	return -1;
277	if (inb(L4_PORT) != L4_ID)
278	return -1;
279
280	if (l4_wait_ready())
281	return -1;
282	rev = inb(L4_PORT);
283
284	if (!rev)
285	return -1;
286
287	result = l4_create_ports(card_no);
288	if (result)
289	return result;
290
291	printk(KERN_INFO "gameport: PDPI Lightning 4 %s card v%d.%d at %#x\n",
292	card_no ? "secondary" : "primary", rev >> 4, rev, L4_PORT);
293
294	for (i = 0; i < 4; i++) {
295	l4 = &l4_ports[card_no * 4 + i];
296
297	if (rev > 0x28) /* on 2.9+ the setcal command works correctly */
298	l4_setcal(l4->port, cal);
299	gameport_register_port(l4->gameport);
300	}
301
302	return 0;
303	}
304
305	static int __init l4_init(void)
306	{
307	int i, cards = 0;
308
309	if (!request_region(L4_PORT, 1, "lightning"))
6a89bc00	310	return -EBUSY;
1da177e4 LT	311
	312	for (i = 0; i < 2; i++)
	313	if (l4_add_card(i) == 0)
	314	cards++;
	315
	316	outb(L4_SELECT_ANALOG, L4_PORT);
	317
	318	if (!cards) {
	319	release_region(L4_PORT, 1);
6a89bc00	320	return -ENODEV;
1da177e4 LT	321	}
	322
	323	return 0;
	324	}
	325
	326	static void __exit l4_exit(void)
	327	{
	328	int i;
	329	int cal[4] = { 59, 59, 59, 59 };
	330
	331	for (i = 0; i < 8; i++)
	332	if (l4_ports[i].gameport) {
	333	l4_setcal(l4_ports[i].port, cal);
	334	gameport_unregister_port(l4_ports[i].gameport);
	335	}
	336
	337	outb(L4_SELECT_ANALOG, L4_PORT);
	338	release_region(L4_PORT, 1);
	339	}
	340
	341	module_init(l4_init);
	342	module_exit(l4_exit);