Merge branch 'linus' into x86/spinlocks
[linux-2.6] / drivers / media / radio / radio-trust.c
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  * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
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/videodev2.h>
25 #include <media/v4l2-common.h>
26 #include <media/v4l2-ioctl.h>
27
28 #include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
29 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
30
31 static struct v4l2_queryctrl radio_qctrl[] = {
32         {
33                 .id            = V4L2_CID_AUDIO_MUTE,
34                 .name          = "Mute",
35                 .minimum       = 0,
36                 .maximum       = 1,
37                 .default_value = 1,
38                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
39         },{
40                 .id            = V4L2_CID_AUDIO_VOLUME,
41                 .name          = "Volume",
42                 .minimum       = 0,
43                 .maximum       = 65535,
44                 .step          = 2048,
45                 .default_value = 65535,
46                 .type          = V4L2_CTRL_TYPE_INTEGER,
47         },{
48                 .id            = V4L2_CID_AUDIO_BASS,
49                 .name          = "Bass",
50                 .minimum       = 0,
51                 .maximum       = 65535,
52                 .step          = 4370,
53                 .default_value = 32768,
54                 .type          = V4L2_CTRL_TYPE_INTEGER,
55         },{
56                 .id            = V4L2_CID_AUDIO_TREBLE,
57                 .name          = "Treble",
58                 .minimum       = 0,
59                 .maximum       = 65535,
60                 .step          = 4370,
61                 .default_value = 32768,
62                 .type          = V4L2_CTRL_TYPE_INTEGER,
63         },
64 };
65
66 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
67
68 #ifndef CONFIG_RADIO_TRUST_PORT
69 #define CONFIG_RADIO_TRUST_PORT -1
70 #endif
71
72 static int io = CONFIG_RADIO_TRUST_PORT;
73 static int radio_nr = -1;
74 static int ioval = 0xf;
75 static __u16 curvol;
76 static __u16 curbass;
77 static __u16 curtreble;
78 static unsigned long curfreq;
79 static int curstereo;
80 static int curmute;
81
82 /* i2c addresses */
83 #define TDA7318_ADDR 0x88
84 #define TSA6060T_ADDR 0xc4
85
86 #define TR_DELAY do { inb(io); inb(io); inb(io); } while(0)
87 #define TR_SET_SCL outb(ioval |= 2, io)
88 #define TR_CLR_SCL outb(ioval &= 0xfd, io)
89 #define TR_SET_SDA outb(ioval |= 1, io)
90 #define TR_CLR_SDA outb(ioval &= 0xfe, io)
91
92 static void write_i2c(int n, ...)
93 {
94         unsigned char val, mask;
95         va_list args;
96
97         va_start(args, n);
98
99         /* start condition */
100         TR_SET_SDA;
101         TR_SET_SCL;
102         TR_DELAY;
103         TR_CLR_SDA;
104         TR_CLR_SCL;
105         TR_DELAY;
106
107         for(; n; n--) {
108                 val = va_arg(args, unsigned);
109                 for(mask = 0x80; mask; mask >>= 1) {
110                         if(val & mask)
111                                 TR_SET_SDA;
112                         else
113                                 TR_CLR_SDA;
114                         TR_SET_SCL;
115                         TR_DELAY;
116                         TR_CLR_SCL;
117                         TR_DELAY;
118                 }
119                 /* acknowledge bit */
120                 TR_SET_SDA;
121                 TR_SET_SCL;
122                 TR_DELAY;
123                 TR_CLR_SCL;
124                 TR_DELAY;
125         }
126
127         /* stop condition */
128         TR_CLR_SDA;
129         TR_DELAY;
130         TR_SET_SCL;
131         TR_DELAY;
132         TR_SET_SDA;
133         TR_DELAY;
134
135         va_end(args);
136 }
137
138 static void tr_setvol(__u16 vol)
139 {
140         curvol = vol / 2048;
141         write_i2c(2, TDA7318_ADDR, curvol ^ 0x1f);
142 }
143
144 static int basstreble2chip[15] = {
145         0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
146 };
147
148 static void tr_setbass(__u16 bass)
149 {
150         curbass = bass / 4370;
151         write_i2c(2, TDA7318_ADDR, 0x60 | basstreble2chip[curbass]);
152 }
153
154 static void tr_settreble(__u16 treble)
155 {
156         curtreble = treble / 4370;
157         write_i2c(2, TDA7318_ADDR, 0x70 | basstreble2chip[curtreble]);
158 }
159
160 static void tr_setstereo(int stereo)
161 {
162         curstereo = !!stereo;
163         ioval = (ioval & 0xfb) | (!curstereo << 2);
164         outb(ioval, io);
165 }
166
167 static void tr_setmute(int mute)
168 {
169         curmute = !!mute;
170         ioval = (ioval & 0xf7) | (curmute << 3);
171         outb(ioval, io);
172 }
173
174 static int tr_getsigstr(void)
175 {
176         int i, v;
177
178         for(i = 0, v = 0; i < 100; i++) v |= inb(io);
179         return (v & 1)? 0 : 0xffff;
180 }
181
182 static int tr_getstereo(void)
183 {
184         /* don't know how to determine it, just return the setting */
185         return curstereo;
186 }
187
188 static void tr_setfreq(unsigned long f)
189 {
190         f /= 160;       /* Convert to 10 kHz units      */
191         f += 1070;      /* Add 10.7 MHz IF                      */
192
193         write_i2c(5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
194 }
195
196 static int vidioc_querycap(struct file *file, void *priv,
197                                 struct v4l2_capability *v)
198 {
199         strlcpy(v->driver, "radio-trust", sizeof(v->driver));
200         strlcpy(v->card, "Trust FM Radio", sizeof(v->card));
201         sprintf(v->bus_info, "ISA");
202         v->version = RADIO_VERSION;
203         v->capabilities = V4L2_CAP_TUNER;
204         return 0;
205 }
206
207 static int vidioc_g_tuner(struct file *file, void *priv,
208                                 struct v4l2_tuner *v)
209 {
210         if (v->index > 0)
211                 return -EINVAL;
212
213         strcpy(v->name, "FM");
214         v->type = V4L2_TUNER_RADIO;
215         v->rangelow = (87.5*16000);
216         v->rangehigh = (108*16000);
217         v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
218         v->capability = V4L2_TUNER_CAP_LOW;
219         if (tr_getstereo())
220                 v->audmode = V4L2_TUNER_MODE_STEREO;
221         else
222                 v->audmode = V4L2_TUNER_MODE_MONO;
223         v->signal = tr_getsigstr();
224         return 0;
225 }
226
227 static int vidioc_s_tuner(struct file *file, void *priv,
228                                 struct v4l2_tuner *v)
229 {
230         if (v->index > 0)
231                 return -EINVAL;
232
233         return 0;
234 }
235
236 static int vidioc_s_frequency(struct file *file, void *priv,
237                                 struct v4l2_frequency *f)
238 {
239         curfreq = f->frequency;
240         tr_setfreq(curfreq);
241         return 0;
242 }
243
244 static int vidioc_g_frequency(struct file *file, void *priv,
245                                 struct v4l2_frequency *f)
246 {
247         f->type = V4L2_TUNER_RADIO;
248         f->frequency = curfreq;
249         return 0;
250 }
251
252 static int vidioc_queryctrl(struct file *file, void *priv,
253                                 struct v4l2_queryctrl *qc)
254 {
255         int i;
256
257         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
258                 if (qc->id && qc->id == radio_qctrl[i].id) {
259                         memcpy(qc, &(radio_qctrl[i]),
260                                                 sizeof(*qc));
261                         return 0;
262                 }
263         }
264         return -EINVAL;
265 }
266
267 static int vidioc_g_ctrl(struct file *file, void *priv,
268                                 struct v4l2_control *ctrl)
269 {
270         switch (ctrl->id) {
271         case V4L2_CID_AUDIO_MUTE:
272                 ctrl->value = curmute;
273                 return 0;
274         case V4L2_CID_AUDIO_VOLUME:
275                 ctrl->value = curvol * 2048;
276                 return 0;
277         case V4L2_CID_AUDIO_BASS:
278                 ctrl->value = curbass * 4370;
279                 return 0;
280         case V4L2_CID_AUDIO_TREBLE:
281                 ctrl->value = curtreble * 4370;
282                 return 0;
283         }
284         return -EINVAL;
285 }
286
287 static int vidioc_s_ctrl(struct file *file, void *priv,
288                                 struct v4l2_control *ctrl)
289 {
290         switch (ctrl->id) {
291         case V4L2_CID_AUDIO_MUTE:
292                 tr_setmute(ctrl->value);
293                 return 0;
294         case V4L2_CID_AUDIO_VOLUME:
295                 tr_setvol(ctrl->value);
296                 return 0;
297         case V4L2_CID_AUDIO_BASS:
298                 tr_setbass(ctrl->value);
299                 return 0;
300         case V4L2_CID_AUDIO_TREBLE:
301                 tr_settreble(ctrl->value);
302                 return 0;
303         }
304         return -EINVAL;
305 }
306
307 static int vidioc_g_audio(struct file *file, void *priv,
308                                 struct v4l2_audio *a)
309 {
310         if (a->index > 1)
311                 return -EINVAL;
312
313         strcpy(a->name, "Radio");
314         a->capability = V4L2_AUDCAP_STEREO;
315         return 0;
316 }
317
318 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
319 {
320         *i = 0;
321         return 0;
322 }
323
324 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
325 {
326         if (i != 0)
327                 return -EINVAL;
328         return 0;
329 }
330
331 static int vidioc_s_audio(struct file *file, void *priv,
332                                 struct v4l2_audio *a)
333 {
334         if (a->index != 0)
335                 return -EINVAL;
336         return 0;
337 }
338
339 static const struct file_operations trust_fops = {
340         .owner          = THIS_MODULE,
341         .open           = video_exclusive_open,
342         .release        = video_exclusive_release,
343         .ioctl          = video_ioctl2,
344 #ifdef CONFIG_COMPAT
345         .compat_ioctl   = v4l_compat_ioctl32,
346 #endif
347         .llseek         = no_llseek,
348 };
349
350 static const struct v4l2_ioctl_ops trust_ioctl_ops = {
351         .vidioc_querycap    = vidioc_querycap,
352         .vidioc_g_tuner     = vidioc_g_tuner,
353         .vidioc_s_tuner     = vidioc_s_tuner,
354         .vidioc_g_frequency = vidioc_g_frequency,
355         .vidioc_s_frequency = vidioc_s_frequency,
356         .vidioc_queryctrl   = vidioc_queryctrl,
357         .vidioc_g_ctrl      = vidioc_g_ctrl,
358         .vidioc_s_ctrl      = vidioc_s_ctrl,
359         .vidioc_g_audio     = vidioc_g_audio,
360         .vidioc_s_audio     = vidioc_s_audio,
361         .vidioc_g_input     = vidioc_g_input,
362         .vidioc_s_input     = vidioc_s_input,
363 };
364
365 static struct video_device trust_radio = {
366         .name           = "Trust FM Radio",
367         .fops           = &trust_fops,
368         .ioctl_ops      = &trust_ioctl_ops,
369 };
370
371 static int __init trust_init(void)
372 {
373         if(io == -1) {
374                 printk(KERN_ERR "You must set an I/O address with io=0x???\n");
375                 return -EINVAL;
376         }
377         if(!request_region(io, 2, "Trust FM Radio")) {
378                 printk(KERN_ERR "trust: port 0x%x already in use\n", io);
379                 return -EBUSY;
380         }
381         if (video_register_device(&trust_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
382                 release_region(io, 2);
383                 return -EINVAL;
384         }
385
386         printk(KERN_INFO "Trust FM Radio card driver v1.0.\n");
387
388         write_i2c(2, TDA7318_ADDR, 0x80);       /* speaker att. LF = 0 dB */
389         write_i2c(2, TDA7318_ADDR, 0xa0);       /* speaker att. RF = 0 dB */
390         write_i2c(2, TDA7318_ADDR, 0xc0);       /* speaker att. LR = 0 dB */
391         write_i2c(2, TDA7318_ADDR, 0xe0);       /* speaker att. RR = 0 dB */
392         write_i2c(2, TDA7318_ADDR, 0x40);       /* stereo 1 input, gain = 18.75 dB */
393
394         tr_setvol(0x8000);
395         tr_setbass(0x8000);
396         tr_settreble(0x8000);
397         tr_setstereo(1);
398
399         /* mute card - prevents noisy bootups */
400         tr_setmute(1);
401
402         return 0;
403 }
404
405 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
406 MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
407 MODULE_LICENSE("GPL");
408
409 module_param(io, int, 0);
410 MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
411 module_param(radio_nr, int, 0);
412
413 static void __exit cleanup_trust_module(void)
414 {
415         video_unregister_device(&trust_radio);
416         release_region(io, 2);
417 }
418
419 module_init(trust_init);
420 module_exit(cleanup_trust_module);