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Staging: strip: delete the driver
[linux/fpc-iii.git] / drivers / media / radio / radio-zoltrix.c
blobf31eab99c943ba9cdc722e7b3163ed91f079d8a1
1 /* zoltrix radio plus driver for Linux radio support
2 * (c) 1998 C. van Schaik <carl@leg.uct.ac.za>
3 *
4 * BUGS
5 * Due to the inconsistency in reading from the signal flags
6 * it is difficult to get an accurate tuned signal.
7 *
8 * It seems that the card is not linear to 0 volume. It cuts off
9 * at a low volume, and it is not possible (at least I have not found)
10 * to get fine volume control over the low volume range.
11 *
12 * Some code derived from code by Romolo Manfredini
13 * romolo@bicnet.it
14 *
15 * 1999-05-06 - (C. van Schaik)
16 * - Make signal strength and stereo scans
17 * kinder to cpu while in delay
18 * 1999-01-05 - (C. van Schaik)
19 * - Changed tuning to 1/160Mhz accuracy
20 * - Added stereo support
21 * (card defaults to stereo)
22 * (can explicitly force mono on the card)
23 * (can detect if station is in stereo)
24 * - Added unmute function
25 * - Reworked ioctl functions
26 * 2002-07-15 - Fix Stereo typo
27 *
28 * 2006-07-24 - Converted to V4L2 API
29 * by Mauro Carvalho Chehab <mchehab@infradead.org>
30 */
31
32 #include <linux/module.h> /* Modules */
33 #include <linux/init.h> /* Initdata */
34 #include <linux/ioport.h> /* request_region */
35 #include <linux/delay.h> /* udelay, msleep */
36 #include <linux/videodev2.h> /* kernel radio structs */
37 #include <linux/mutex.h>
38 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
39 #include <linux/io.h> /* outb, outb_p */
40 #include <media/v4l2-device.h>
41 #include <media/v4l2-ioctl.h>
42
43 MODULE_AUTHOR("C.van Schaik");
44 MODULE_DESCRIPTION("A driver for the Zoltrix Radio Plus.");
45 MODULE_LICENSE("GPL");
46
47 #ifndef CONFIG_RADIO_ZOLTRIX_PORT
48 #define CONFIG_RADIO_ZOLTRIX_PORT -1
49 #endif
50
51 static int io = CONFIG_RADIO_ZOLTRIX_PORT;
52 static int radio_nr = -1;
53
54 module_param(io, int, 0);
55 MODULE_PARM_DESC(io, "I/O address of the Zoltrix Radio Plus (0x20c or 0x30c)");
56 module_param(radio_nr, int, 0);
57
58 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
59
60 struct zoltrix {
61 struct v4l2_device v4l2_dev;
62 struct video_device vdev;
63 int io;
64 int curvol;
65 unsigned long curfreq;
66 int muted;
67 unsigned int stereo;
68 struct mutex lock;
69 };
70
71 static struct zoltrix zoltrix_card;
72
73 static int zol_setvol(struct zoltrix *zol, int vol)
74 {
75 zol->curvol = vol;
76 if (zol->muted)
77 return 0;
78
79 mutex_lock(&zol->lock);
80 if (vol == 0) {
81 outb(0, zol->io);
82 outb(0, zol->io);
83 inb(zol->io + 3); /* Zoltrix needs to be read to confirm */
84 mutex_unlock(&zol->lock);
85 return 0;
86 }
87
88 outb(zol->curvol-1, zol->io);
89 msleep(10);
90 inb(zol->io + 2);
91 mutex_unlock(&zol->lock);
92 return 0;
93 }
94
95 static void zol_mute(struct zoltrix *zol)
96 {
97 zol->muted = 1;
98 mutex_lock(&zol->lock);
99 outb(0, zol->io);
100 outb(0, zol->io);
101 inb(zol->io + 3); /* Zoltrix needs to be read to confirm */
102 mutex_unlock(&zol->lock);
103 }
104
105 static void zol_unmute(struct zoltrix *zol)
106 {
107 zol->muted = 0;
108 zol_setvol(zol, zol->curvol);
109 }
110
111 static int zol_setfreq(struct zoltrix *zol, unsigned long freq)
112 {
113 /* tunes the radio to the desired frequency */
114 struct v4l2_device *v4l2_dev = &zol->v4l2_dev;
115 unsigned long long bitmask, f, m;
116 unsigned int stereo = zol->stereo;
117 int i;
118
119 if (freq == 0) {
120 v4l2_warn(v4l2_dev, "cannot set a frequency of 0.\n");
121 return -EINVAL;
122 }
123
124 m = (freq / 160 - 8800) * 2;
125 f = (unsigned long long)m + 0x4d1c;
126
127 bitmask = 0xc480402c10080000ull;
128 i = 45;
129
130 mutex_lock(&zol->lock);
131
132 zol->curfreq = freq;
133
134 outb(0, zol->io);
135 outb(0, zol->io);
136 inb(zol->io + 3); /* Zoltrix needs to be read to confirm */
137
138 outb(0x40, zol->io);
139 outb(0xc0, zol->io);
140
141 bitmask = (bitmask ^ ((f & 0xff) << 47) ^ ((f & 0xff00) << 30) ^ (stereo << 31));
142 while (i--) {
143 if ((bitmask & 0x8000000000000000ull) != 0) {
144 outb(0x80, zol->io);
145 udelay(50);
146 outb(0x00, zol->io);
147 udelay(50);
148 outb(0x80, zol->io);
149 udelay(50);
150 } else {
151 outb(0xc0, zol->io);
152 udelay(50);
153 outb(0x40, zol->io);
154 udelay(50);
155 outb(0xc0, zol->io);
156 udelay(50);
157 }
158 bitmask *= 2;
159 }
160 /* termination sequence */
161 outb(0x80, zol->io);
162 outb(0xc0, zol->io);
163 outb(0x40, zol->io);
164 udelay(1000);
165 inb(zol->io + 2);
166
167 udelay(1000);
168
169 if (zol->muted) {
170 outb(0, zol->io);
171 outb(0, zol->io);
172 inb(zol->io + 3);
173 udelay(1000);
174 }
175
176 mutex_unlock(&zol->lock);
177
178 if (!zol->muted)
179 zol_setvol(zol, zol->curvol);
180 return 0;
181 }
182
183 /* Get signal strength */
184 static int zol_getsigstr(struct zoltrix *zol)
185 {
186 int a, b;
187
188 mutex_lock(&zol->lock);
189 outb(0x00, zol->io); /* This stuff I found to do nothing */
190 outb(zol->curvol, zol->io);
191 msleep(20);
192
193 a = inb(zol->io);
194 msleep(10);
195 b = inb(zol->io);
196
197 mutex_unlock(&zol->lock);
198
199 if (a != b)
200 return 0;
201
202 /* I found this out by playing with a binary scanner on the card io */
203 return a == 0xcf || a == 0xdf || a == 0xef;
204 }
205
206 static int zol_is_stereo(struct zoltrix *zol)
207 {
208 int x1, x2;
209
210 mutex_lock(&zol->lock);
211
212 outb(0x00, zol->io);
213 outb(zol->curvol, zol->io);
214 msleep(20);
215
216 x1 = inb(zol->io);
217 msleep(10);
218 x2 = inb(zol->io);
219
220 mutex_unlock(&zol->lock);
221
222 return x1 == x2 && x1 == 0xcf;
223 }
224
225 static int vidioc_querycap(struct file *file, void *priv,
226 struct v4l2_capability *v)
227 {
228 strlcpy(v->driver, "radio-zoltrix", sizeof(v->driver));
229 strlcpy(v->card, "Zoltrix Radio", sizeof(v->card));
230 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
231 v->version = RADIO_VERSION;
232 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
233 return 0;
234 }
235
236 static int vidioc_g_tuner(struct file *file, void *priv,
237 struct v4l2_tuner *v)
238 {
239 struct zoltrix *zol = video_drvdata(file);
240
241 if (v->index > 0)
242 return -EINVAL;
243
244 strlcpy(v->name, "FM", sizeof(v->name));
245 v->type = V4L2_TUNER_RADIO;
246 v->rangelow = 88 * 16000;
247 v->rangehigh = 108 * 16000;
248 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
249 v->capability = V4L2_TUNER_CAP_LOW;
250 if (zol_is_stereo(zol))
251 v->audmode = V4L2_TUNER_MODE_STEREO;
252 else
253 v->audmode = V4L2_TUNER_MODE_MONO;
254 v->signal = 0xFFFF * zol_getsigstr(zol);
255 return 0;
256 }
257
258 static int vidioc_s_tuner(struct file *file, void *priv,
259 struct v4l2_tuner *v)
260 {
261 return v->index ? -EINVAL : 0;
262 }
263
264 static int vidioc_s_frequency(struct file *file, void *priv,
265 struct v4l2_frequency *f)
266 {
267 struct zoltrix *zol = video_drvdata(file);
268
269 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
270 return -EINVAL;
271 if (zol_setfreq(zol, f->frequency) != 0)
272 return -EINVAL;
273 return 0;
274 }
275
276 static int vidioc_g_frequency(struct file *file, void *priv,
277 struct v4l2_frequency *f)
278 {
279 struct zoltrix *zol = video_drvdata(file);
280
281 if (f->tuner != 0)
282 return -EINVAL;
283 f->type = V4L2_TUNER_RADIO;
284 f->frequency = zol->curfreq;
285 return 0;
286 }
287
288 static int vidioc_queryctrl(struct file *file, void *priv,
289 struct v4l2_queryctrl *qc)
290 {
291 switch (qc->id) {
292 case V4L2_CID_AUDIO_MUTE:
293 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
294 case V4L2_CID_AUDIO_VOLUME:
295 return v4l2_ctrl_query_fill(qc, 0, 65535, 4096, 65535);
296 }
297 return -EINVAL;
298 }
299
300 static int vidioc_g_ctrl(struct file *file, void *priv,
301 struct v4l2_control *ctrl)
302 {
303 struct zoltrix *zol = video_drvdata(file);
304
305 switch (ctrl->id) {
306 case V4L2_CID_AUDIO_MUTE:
307 ctrl->value = zol->muted;
308 return 0;
309 case V4L2_CID_AUDIO_VOLUME:
310 ctrl->value = zol->curvol * 4096;
311 return 0;
312 }
313 return -EINVAL;
314 }
315
316 static int vidioc_s_ctrl(struct file *file, void *priv,
317 struct v4l2_control *ctrl)
318 {
319 struct zoltrix *zol = video_drvdata(file);
320
321 switch (ctrl->id) {
322 case V4L2_CID_AUDIO_MUTE:
323 if (ctrl->value)
324 zol_mute(zol);
325 else {
326 zol_unmute(zol);
327 zol_setvol(zol, zol->curvol);
328 }
329 return 0;
330 case V4L2_CID_AUDIO_VOLUME:
331 zol_setvol(zol, ctrl->value / 4096);
332 return 0;
333 }
334 zol->stereo = 1;
335 if (zol_setfreq(zol, zol->curfreq) != 0)
336 return -EINVAL;
337 #if 0
338 /* FIXME: Implement stereo/mono switch on V4L2 */
339 if (v->mode & VIDEO_SOUND_STEREO) {
340 zol->stereo = 1;
341 zol_setfreq(zol, zol->curfreq);
342 }
343 if (v->mode & VIDEO_SOUND_MONO) {
344 zol->stereo = 0;
345 zol_setfreq(zol, zol->curfreq);
346 }
347 #endif
348 return -EINVAL;
349 }
350
351 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
352 {
353 *i = 0;
354 return 0;
355 }
356
357 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
358 {
359 return i ? -EINVAL : 0;
360 }
361
362 static int vidioc_g_audio(struct file *file, void *priv,
363 struct v4l2_audio *a)
364 {
365 a->index = 0;
366 strlcpy(a->name, "Radio", sizeof(a->name));
367 a->capability = V4L2_AUDCAP_STEREO;
368 return 0;
369 }
370
371 static int vidioc_s_audio(struct file *file, void *priv,
372 struct v4l2_audio *a)
373 {
374 return a->index ? -EINVAL : 0;
375 }
376
377 static const struct v4l2_file_operations zoltrix_fops =
378 {
379 .owner = THIS_MODULE,
380 .ioctl = video_ioctl2,
381 };
382
383 static const struct v4l2_ioctl_ops zoltrix_ioctl_ops = {
384 .vidioc_querycap = vidioc_querycap,
385 .vidioc_g_tuner = vidioc_g_tuner,
386 .vidioc_s_tuner = vidioc_s_tuner,
387 .vidioc_g_audio = vidioc_g_audio,
388 .vidioc_s_audio = vidioc_s_audio,
389 .vidioc_g_input = vidioc_g_input,
390 .vidioc_s_input = vidioc_s_input,
391 .vidioc_g_frequency = vidioc_g_frequency,
392 .vidioc_s_frequency = vidioc_s_frequency,
393 .vidioc_queryctrl = vidioc_queryctrl,
394 .vidioc_g_ctrl = vidioc_g_ctrl,
395 .vidioc_s_ctrl = vidioc_s_ctrl,
396 };
397
398 static int __init zoltrix_init(void)
399 {
400 struct zoltrix *zol = &zoltrix_card;
401 struct v4l2_device *v4l2_dev = &zol->v4l2_dev;
402 int res;
403
404 strlcpy(v4l2_dev->name, "zoltrix", sizeof(v4l2_dev->name));
405 zol->io = io;
406 if (zol->io == -1) {
407 v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or 0x30c\n");
408 return -EINVAL;
409 }
410 if (zol->io != 0x20c && zol->io != 0x30c) {
411 v4l2_err(v4l2_dev, "invalid port, try 0x20c or 0x30c\n");
412 return -ENXIO;
413 }
414
415 if (!request_region(zol->io, 2, "zoltrix")) {
416 v4l2_err(v4l2_dev, "port 0x%x already in use\n", zol->io);
417 return -EBUSY;
418 }
419
420 res = v4l2_device_register(NULL, v4l2_dev);
421 if (res < 0) {
422 release_region(zol->io, 2);
423 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
424 return res;
425 }
426
427 strlcpy(zol->vdev.name, v4l2_dev->name, sizeof(zol->vdev.name));
428 zol->vdev.v4l2_dev = v4l2_dev;
429 zol->vdev.fops = &zoltrix_fops;
430 zol->vdev.ioctl_ops = &zoltrix_ioctl_ops;
431 zol->vdev.release = video_device_release_empty;
432 video_set_drvdata(&zol->vdev, zol);
433
434 if (video_register_device(&zol->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
435 v4l2_device_unregister(v4l2_dev);
436 release_region(zol->io, 2);
437 return -EINVAL;
438 }
439 v4l2_info(v4l2_dev, "Zoltrix Radio Plus card driver.\n");
440
441 mutex_init(&zol->lock);
442
443 /* mute card - prevents noisy bootups */
444
445 /* this ensures that the volume is all the way down */
446
447 outb(0, zol->io);
448 outb(0, zol->io);
449 msleep(20);
450 inb(zol->io + 3);
451
452 zol->curvol = 0;
453 zol->stereo = 1;
454
455 return 0;
456 }
457
458 static void __exit zoltrix_exit(void)
459 {
460 struct zoltrix *zol = &zoltrix_card;
461
462 video_unregister_device(&zol->vdev);
463 v4l2_device_unregister(&zol->v4l2_dev);
464 release_region(zol->io, 2);
465 }
466
467 module_init(zoltrix_init);
468 module_exit(zoltrix_exit);
469
Linux with added FPC-III support