aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/radio/radio-trust.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/media/radio/radio-trust.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/media/radio/radio-trust.c')
-rw-r--r--drivers/media/radio/radio-trust.c320
1 files changed, 320 insertions, 0 deletions
diff --git a/drivers/media/radio/radio-trust.c b/drivers/media/radio/radio-trust.c
new file mode 100644
index 000000000000..b300bedf7c74
--- /dev/null
+++ b/drivers/media/radio/radio-trust.c
@@ -0,0 +1,320 @@
1/* radio-trust.c - Trust FM Radio card driver for Linux 2.2
2 * by Eric Lammerts <eric@scintilla.utwente.nl>
3 *
4 * Based on radio-aztech.c. Original notes:
5 *
6 * Adapted to support the Video for Linux API by
7 * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:
8 *
9 * Quay Ly
10 * Donald Song
11 * Jason Lewis (jlewis@twilight.vtc.vsc.edu)
12 * Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
13 * William McGrath (wmcgrath@twilight.vtc.vsc.edu)
14 *
15 * The basis for this code may be found at http://bigbang.vtc.vsc.edu/fmradio/
16 */
17
18#include <stdarg.h>
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/ioport.h>
22#include <asm/io.h>
23#include <asm/uaccess.h>
24#include <linux/videodev.h>
25#include <linux/config.h> /* CONFIG_RADIO_TRUST_PORT */
26
27/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
28
29#ifndef CONFIG_RADIO_TRUST_PORT
30#define CONFIG_RADIO_TRUST_PORT -1
31#endif
32
33static int io = CONFIG_RADIO_TRUST_PORT;
34static int radio_nr = -1;
35static int ioval = 0xf;
36static __u16 curvol;
37static __u16 curbass;
38static __u16 curtreble;
39static unsigned long curfreq;
40static int curstereo;
41static int curmute;
42
43/* i2c addresses */
44#define TDA7318_ADDR 0x88
45#define TSA6060T_ADDR 0xc4
46
47#define TR_DELAY do { inb(io); inb(io); inb(io); } while(0)
48#define TR_SET_SCL outb(ioval |= 2, io)
49#define TR_CLR_SCL outb(ioval &= 0xfd, io)
50#define TR_SET_SDA outb(ioval |= 1, io)
51#define TR_CLR_SDA outb(ioval &= 0xfe, io)
52
53static void write_i2c(int n, ...)
54{
55 unsigned char val, mask;
56 va_list args;
57
58 va_start(args, n);
59
60 /* start condition */
61 TR_SET_SDA;
62 TR_SET_SCL;
63 TR_DELAY;
64 TR_CLR_SDA;
65 TR_CLR_SCL;
66 TR_DELAY;
67
68 for(; n; n--) {
69 val = va_arg(args, unsigned);
70 for(mask = 0x80; mask; mask >>= 1) {
71 if(val & mask)
72 TR_SET_SDA;
73 else
74 TR_CLR_SDA;
75 TR_SET_SCL;
76 TR_DELAY;
77 TR_CLR_SCL;
78 TR_DELAY;
79 }
80 /* acknowledge bit */
81 TR_SET_SDA;
82 TR_SET_SCL;
83 TR_DELAY;
84 TR_CLR_SCL;
85 TR_DELAY;
86 }
87
88 /* stop condition */
89 TR_CLR_SDA;
90 TR_DELAY;
91 TR_SET_SCL;
92 TR_DELAY;
93 TR_SET_SDA;
94 TR_DELAY;
95
96 va_end(args);
97}
98
99static void tr_setvol(__u16 vol)
100{
101 curvol = vol / 2048;
102 write_i2c(2, TDA7318_ADDR, curvol ^ 0x1f);
103}
104
105static int basstreble2chip[15] = {
106 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
107};
108
109static void tr_setbass(__u16 bass)
110{
111 curbass = bass / 4370;
112 write_i2c(2, TDA7318_ADDR, 0x60 | basstreble2chip[curbass]);
113}
114
115static void tr_settreble(__u16 treble)
116{
117 curtreble = treble / 4370;
118 write_i2c(2, TDA7318_ADDR, 0x70 | basstreble2chip[curtreble]);
119}
120
121static void tr_setstereo(int stereo)
122{
123 curstereo = !!stereo;
124 ioval = (ioval & 0xfb) | (!curstereo << 2);
125 outb(ioval, io);
126}
127
128static void tr_setmute(int mute)
129{
130 curmute = !!mute;
131 ioval = (ioval & 0xf7) | (curmute << 3);
132 outb(ioval, io);
133}
134
135static int tr_getsigstr(void)
136{
137 int i, v;
138
139 for(i = 0, v = 0; i < 100; i++) v |= inb(io);
140 return (v & 1)? 0 : 0xffff;
141}
142
143static int tr_getstereo(void)
144{
145 /* don't know how to determine it, just return the setting */
146 return curstereo;
147}
148
149static void tr_setfreq(unsigned long f)
150{
151 f /= 160; /* Convert to 10 kHz units */
152 f += 1070; /* Add 10.7 MHz IF */
153
154 write_i2c(5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
155}
156
157static int tr_do_ioctl(struct inode *inode, struct file *file,
158 unsigned int cmd, void *arg)
159{
160 switch(cmd)
161 {
162 case VIDIOCGCAP:
163 {
164 struct video_capability *v = arg;
165
166 memset(v,0,sizeof(*v));
167 v->type=VID_TYPE_TUNER;
168 v->channels=1;
169 v->audios=1;
170 strcpy(v->name, "Trust FM Radio");
171
172 return 0;
173 }
174 case VIDIOCGTUNER:
175 {
176 struct video_tuner *v = arg;
177
178 if(v->tuner) /* Only 1 tuner */
179 return -EINVAL;
180
181 v->rangelow = 87500 * 16;
182 v->rangehigh = 108000 * 16;
183 v->flags = VIDEO_TUNER_LOW;
184 v->mode = VIDEO_MODE_AUTO;
185
186 v->signal = tr_getsigstr();
187 if(tr_getstereo())
188 v->flags |= VIDEO_TUNER_STEREO_ON;
189
190 strcpy(v->name, "FM");
191
192 return 0;
193 }
194 case VIDIOCSTUNER:
195 {
196 struct video_tuner *v = arg;
197 if(v->tuner != 0)
198 return -EINVAL;
199 return 0;
200 }
201 case VIDIOCGFREQ:
202 {
203 unsigned long *freq = arg;
204 *freq = curfreq;
205 return 0;
206 }
207 case VIDIOCSFREQ:
208 {
209 unsigned long *freq = arg;
210 tr_setfreq(*freq);
211 return 0;
212 }
213 case VIDIOCGAUDIO:
214 {
215 struct video_audio *v = arg;
216
217 memset(v,0, sizeof(*v));
218 v->flags = VIDEO_AUDIO_MUTABLE | VIDEO_AUDIO_VOLUME |
219 VIDEO_AUDIO_BASS | VIDEO_AUDIO_TREBLE;
220 v->mode = curstereo? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO;
221 v->volume = curvol * 2048;
222 v->step = 2048;
223 v->bass = curbass * 4370;
224 v->treble = curtreble * 4370;
225
226 strcpy(v->name, "Trust FM Radio");
227 return 0;
228 }
229 case VIDIOCSAUDIO:
230 {
231 struct video_audio *v = arg;
232
233 if(v->audio)
234 return -EINVAL;
235 tr_setvol(v->volume);
236 tr_setbass(v->bass);
237 tr_settreble(v->treble);
238 tr_setstereo(v->mode & VIDEO_SOUND_STEREO);
239 tr_setmute(v->flags & VIDEO_AUDIO_MUTE);
240 return 0;
241 }
242 default:
243 return -ENOIOCTLCMD;
244 }
245}
246
247static int tr_ioctl(struct inode *inode, struct file *file,
248 unsigned int cmd, unsigned long arg)
249{
250 return video_usercopy(inode, file, cmd, arg, tr_do_ioctl);
251}
252
253static struct file_operations trust_fops = {
254 .owner = THIS_MODULE,
255 .open = video_exclusive_open,
256 .release = video_exclusive_release,
257 .ioctl = tr_ioctl,
258 .llseek = no_llseek,
259};
260
261static struct video_device trust_radio=
262{
263 .owner = THIS_MODULE,
264 .name = "Trust FM Radio",
265 .type = VID_TYPE_TUNER,
266 .hardware = VID_HARDWARE_TRUST,
267 .fops = &trust_fops,
268};
269
270static int __init trust_init(void)
271{
272 if(io == -1) {
273 printk(KERN_ERR "You must set an I/O address with io=0x???\n");
274 return -EINVAL;
275 }
276 if(!request_region(io, 2, "Trust FM Radio")) {
277 printk(KERN_ERR "trust: port 0x%x already in use\n", io);
278 return -EBUSY;
279 }
280 if(video_register_device(&trust_radio, VFL_TYPE_RADIO, radio_nr)==-1)
281 {
282 release_region(io, 2);
283 return -EINVAL;
284 }
285
286 printk(KERN_INFO "Trust FM Radio card driver v1.0.\n");
287
288 write_i2c(2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */
289 write_i2c(2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */
290 write_i2c(2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */
291 write_i2c(2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */
292 write_i2c(2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */
293
294 tr_setvol(0x8000);
295 tr_setbass(0x8000);
296 tr_settreble(0x8000);
297 tr_setstereo(1);
298
299 /* mute card - prevents noisy bootups */
300 tr_setmute(1);
301
302 return 0;
303}
304
305MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
306MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
307MODULE_LICENSE("GPL");
308
309module_param(io, int, 0);
310MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
311module_param(radio_nr, int, 0);
312
313static void __exit cleanup_trust_module(void)
314{
315 video_unregister_device(&trust_radio);
316 release_region(io, 2);
317}
318
319module_init(trust_init);
320module_exit(cleanup_trust_module);