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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [char/] [joystick/] [lightning.c] - Blame information for rev 1765

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1 1275 phoenix 
/*
2 
 * $Id: lightning.c,v 1.1.1.1 2004-04-15 02:03:27 phoenix Exp $
3 
 *
4 
 *  Copyright (c) 1998-2001 Vojtech Pavlik
5 
 *
6 
 *  Sponsored by SuSE
7 
 */
8 
 
9 
/*
10 
 * PDPI Lightning 4 gamecard driver for Linux.
11 
 */
12 
 
13 
/*
14 
 * This program is free software; you can redistribute it and/or modify
15 
 * it under the terms of the GNU General Public License as published by
16 
 * the Free Software Foundation; either version 2 of the License, or
17 
 * (at your option) any later version.
18 
 *
19 
 * This program is distributed in the hope that it will be useful,
20 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22 
 * GNU General Public License for more details.
23 
 *
24 
 * You should have received a copy of the GNU General Public License
25 
 * along with this program; if not, write to the Free Software
26 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 
 *
28 
 * Should you need to contact me, the author, you can do so either by
29 
 * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
30 
 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
31 
 */
32 
 
33 
#include <asm/io.h>
34 
#include <linux/delay.h>
35 
#include <linux/errno.h>
36 
#include <linux/ioport.h>
37 
#include <linux/kernel.h>
38 
#include <linux/module.h>
39 
#include <linux/init.h>
40 
#include <linux/gameport.h>
41 
#include <linux/slab.h>
42 
 
43 
#define L4_PORT                 0x201
44 
#define L4_SELECT_ANALOG        0xa4
45 
#define L4_SELECT_DIGITAL       0xa5
46 
#define L4_SELECT_SECONDARY     0xa6
47 
#define L4_CMD_ID               0x80
48 
#define L4_CMD_GETCAL           0x92
49 
#define L4_CMD_SETCAL           0x93
50 
#define L4_ID                   0x04
51 
#define L4_BUSY                 0x01
52 
#define L4_TIMEOUT              80      /* 80 us */
53 
 
54 
MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
55 
MODULE_LICENSE("GPL");
56 
 
57 
struct l4 {
58 
        struct gameport gameport;
59 
        unsigned char port;
60 
} *l4_port[8];
61 
 
62 
/*
63 
 * l4_wait_ready() waits for the L4 to become ready.
64 
 */
65 
 
66 
static int l4_wait_ready(void)
67 
{
68 
        unsigned int t;
69 
        t = L4_TIMEOUT;
70 
        while ((inb(L4_PORT) & L4_BUSY) && t > 0) t--;
71 
        return -(t<=0);
72 
}
73 
 
74 
/*
75 
 * l4_cooked_read() reads data from the Lightning 4.
76 
 */
77 
 
78 
static int l4_cooked_read(struct gameport *gameport, int *axes, int *buttons)
79 
{
80 
        struct l4 *l4 = gameport->driver;
81 
        unsigned char status;
82 
        int i, result = -1;
83 
 
84 
        outb(L4_SELECT_ANALOG, L4_PORT);
85 
        outb(L4_SELECT_DIGITAL + (l4->port >> 2), L4_PORT);
86 
 
87 
        if (inb(L4_PORT) & L4_BUSY) goto fail;
88 
        outb(l4->port & 3, L4_PORT);
89 
 
90 
        if (l4_wait_ready()) goto fail;
91 
        status = inb(L4_PORT);
92 
 
93 
        for (i = 0; i < 4; i++)
94 
                if (status & (1 << i)) {
95 
                        if (l4_wait_ready()) goto fail;
96 
                        axes[i] = inb(L4_PORT);
97 
                        if (axes[i] > 252) axes[i] = -1;
98 
                }
99 
 
100 
        if (status & 0x10) {
101 
                if (l4_wait_ready()) goto fail;
102 
                *buttons = inb(L4_PORT) & 0x0f;
103 
        }
104 
 
105 
        result = 0;
106 
 
107 
fail:   outb(L4_SELECT_ANALOG, L4_PORT);
108 
        return result;
109 
}
110 
 
111 
static int l4_open(struct gameport *gameport, int mode)
112 
{
113 
        struct l4 *l4 = gameport->driver;
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 
 
131 
        if (inb(L4_PORT) & L4_BUSY) goto fail;
132 
        outb(L4_CMD_GETCAL, L4_PORT);
133 
 
134 
        if (l4_wait_ready()) goto fail;
135 
        if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2)) goto fail;
136 
 
137 
        if (l4_wait_ready()) goto fail;
138 
        outb(port & 3, L4_PORT);
139 
 
140 
        for (i = 0; i < 4; i++) {
141 
                if (l4_wait_ready()) goto fail;
142 
                cal[i] = inb(L4_PORT);
143 
        }
144 
 
145 
        result = 0;
146 
 
147 
fail:   outb(L4_SELECT_ANALOG, L4_PORT);
148 
        return result;
149 
}
150 
 
151 
/*
152 
 * l4_setcal() programs the L4 with calibration values.
153 
 */
154 
 
155 
static int l4_setcal(int port, int *cal)
156 
{
157 
        int i, result = -1;
158 
 
159 
        outb(L4_SELECT_ANALOG, L4_PORT);
160 
        outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
161 
 
162 
        if (inb(L4_PORT) & L4_BUSY) goto fail;
163 
        outb(L4_CMD_SETCAL, L4_PORT);
164 
 
165 
        if (l4_wait_ready()) goto fail;
166 
        if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2)) goto fail;
167 
 
168 
        if (l4_wait_ready()) goto fail;
169 
        outb(port & 3, L4_PORT);
170 
 
171 
        for (i = 0; i < 4; i++) {
172 
                if (l4_wait_ready()) goto fail;
173 
                outb(cal[i], L4_PORT);
174 
        }
175 
 
176 
        result = 0;
177 
 
178 
fail:   outb(L4_SELECT_ANALOG, L4_PORT);
179 
        return result;
180 
}
181 
 
182 
/*
183 
 * l4_calibrate() calibrates the L4 for the attached device, so
184 
 * that the device's resistance fits into the L4's 8-bit range.
185 
 */
186 
 
187 
static int l4_calibrate(struct gameport *gameport, int *axes, int *max)
188 
{
189 
        int i, t;
190 
        int cal[4];
191 
        struct l4 *l4 = gameport->driver;
192 
 
193 
        if (l4_getcal(l4->port, cal))
194 
                return -1;
195 
 
196 
        for (i = 0; i < 4; i++) {
197 
                t = (max[i] * cal[i]) / 200;
198 
                t = (t < 1) ? 1 : ((t > 255) ? 255 : t);
199 
                axes[i] = (axes[i] < 0) ? -1 : (axes[i] * cal[i]) / t;
200 
                axes[i] = (axes[i] > 252) ? 252 : axes[i];
201 
                cal[i] = t;
202 
        }
203 
 
204 
        if (l4_setcal(l4->port, cal))
205 
                return -1;
206 
 
207 
        return 0;
208 
}
209 
 
210 
int __init l4_init(void)
211 
{
212 
        int cal[4] = {255,255,255,255};
213 
        int i, j, rev, cards = 0;
214 
        struct gameport *gameport;
215 
        struct l4 *l4;
216 
 
217 
        if (!request_region(L4_PORT, 1, "lightning"))
218 
                return -1;
219 
 
220 
        for (i = 0; i < 2; i++) {
221 
 
222 
                outb(L4_SELECT_ANALOG, L4_PORT);
223 
                outb(L4_SELECT_DIGITAL + i, L4_PORT);
224 
 
225 
                if (inb(L4_PORT) & L4_BUSY) continue;
226 
                outb(L4_CMD_ID, L4_PORT);
227 
 
228 
                if (l4_wait_ready()) continue;
229 
                if (inb(L4_PORT) != L4_SELECT_DIGITAL + i) continue;
230 
 
231 
                if (l4_wait_ready()) continue;
232 
                if (inb(L4_PORT) != L4_ID) continue;
233 
 
234 
                if (l4_wait_ready()) continue;
235 
                rev = inb(L4_PORT);
236 
 
237 
                if (!rev) continue;
238 
 
239 
                if (!(l4_port[i * 4] = kmalloc(sizeof(struct l4) * 4, GFP_KERNEL))) {
240 
                        printk(KERN_ERR "lightning: Out of memory allocating ports.\n");
241 
                        continue;
242 
                }
243 
                memset(l4_port[i * 4], 0, sizeof(struct l4) * 4);
244 
 
245 
                for (j = 0; j < 4; j++) {
246 
 
247 
                        l4 = l4_port[i * 4 + j] = l4_port[i * 4] + j;
248 
                        l4->port = i * 4 + j;
249 
 
250 
                        gameport = &l4->gameport;
251 
                        gameport->driver = l4;
252 
                        gameport->open = l4_open;
253 
                        gameport->cooked_read = l4_cooked_read;
254 
                        gameport->calibrate = l4_calibrate;
255 
 
256 
                        if (!i && !j)
257 
                                gameport->io = L4_PORT;
258 
 
259 
                        if (rev > 0x28)         /* on 2.9+ the setcal command works correctly */
260 
                                l4_setcal(l4->port, cal);
261 
 
262 
                        gameport_register_port(gameport);
263 
                }
264 
 
265 
                printk(KERN_INFO "gameport%d,%d,%d,%d: PDPI Lightning 4 %s card v%d.%d at %#x\n",
266 
                        l4_port[i * 4 + 0]->gameport.number, l4_port[i * 4 + 1]->gameport.number,
267 
                        l4_port[i * 4 + 2]->gameport.number, l4_port[i * 4 + 3]->gameport.number,
268 
                        i ? "secondary" : "primary", rev >> 4, rev, L4_PORT);
269 
 
270 
                cards++;
271 
        }
272 
 
273 
        outb(L4_SELECT_ANALOG, L4_PORT);
274 
 
275 
        if (!cards) {
276 
                release_region(L4_PORT, 1);
277 
                return -1;
278 
        }
279 
 
280 
        return 0;
281 
}
282 
 
283 
void __init l4_exit(void)
284 
{
285 
        int i;
286 
        int cal[4] = {59, 59, 59, 59};
287 
 
288 
        for (i = 0; i < 8; i++)
289 
                if (l4_port[i]) {
290 
                        l4_setcal(l4_port[i]->port, cal);
291 
                        gameport_unregister_port(&l4_port[i]->gameport);
292 
                }
293 
        outb(L4_SELECT_ANALOG, L4_PORT);
294 
        release_region(L4_PORT, 1);
295 
}
296 
 
297 
module_init(l4_init);
298 
module_exit(l4_exit);

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