Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* SF16FMR2 radio driver for Linux radio support |
2 | * heavily based on fmi driver... | |
3 | * (c) 2000-2002 Ziglio Frediano, freddy77@angelfire.com | |
4 | * | |
5 | * Notes on the hardware | |
6 | * | |
7 | * Frequency control is done digitally -- ie out(port,encodefreq(95.8)); | |
8 | * No volume control - only mute/unmute - you have to use line volume | |
9 | * | |
10 | * For read stereo/mono you must wait 0.1 sec after set frequency and | |
11 | * card unmuted so I set frequency on unmute | |
12 | * Signal handling seem to work only on autoscanning (not implemented) | |
acda0e71 MCC |
13 | * |
14 | * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> | |
1da177e4 LT |
15 | */ |
16 | ||
17 | #include <linux/module.h> /* Modules */ | |
18 | #include <linux/init.h> /* Initdata */ | |
fb911ee8 | 19 | #include <linux/ioport.h> /* request_region */ |
1da177e4 | 20 | #include <linux/delay.h> /* udelay */ |
acda0e71 | 21 | #include <linux/videodev2.h> /* kernel radio structs */ |
3593cab5 | 22 | #include <linux/mutex.h> |
c32a9d71 HV |
23 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ |
24 | #include <linux/io.h> /* outb, outb_p */ | |
c32a9d71 HV |
25 | #include <media/v4l2-device.h> |
26 | #include <media/v4l2-ioctl.h> | |
1da177e4 | 27 | |
c32a9d71 HV |
28 | MODULE_AUTHOR("Ziglio Frediano, freddy77@angelfire.com"); |
29 | MODULE_DESCRIPTION("A driver for the SF16FMR2 radio."); | |
30 | MODULE_LICENSE("GPL"); | |
31 | ||
32 | static int io = 0x384; | |
33 | static int radio_nr = -1; | |
34 | ||
35 | module_param(io, int, 0); | |
36 | MODULE_PARM_DESC(io, "I/O address of the SF16FMR2 card (should be 0x384, if do not work try 0x284)"); | |
37 | module_param(radio_nr, int, 0); | |
1ddf5bc5 | 38 | |
acda0e71 MCC |
39 | #define RADIO_VERSION KERNEL_VERSION(0,0,2) |
40 | ||
b2cb200f MCC |
41 | #define AUD_VOL_INDEX 1 |
42 | ||
1da177e4 LT |
43 | #undef DEBUG |
44 | //#define DEBUG 1 | |
45 | ||
46 | #ifdef DEBUG | |
47 | # define debug_print(s) printk s | |
48 | #else | |
49 | # define debug_print(s) | |
50 | #endif | |
51 | ||
52 | /* this should be static vars for module size */ | |
c32a9d71 | 53 | struct fmr2 |
1da177e4 | 54 | { |
c32a9d71 HV |
55 | struct v4l2_device v4l2_dev; |
56 | struct video_device vdev; | |
57 | struct mutex lock; | |
58 | int io; | |
b2cb200f | 59 | int curvol; /* 0-15 */ |
1da177e4 LT |
60 | int mute; |
61 | int stereo; /* card is producing stereo audio */ | |
62 | unsigned long curfreq; /* freq in kHz */ | |
63 | int card_type; | |
1da177e4 LT |
64 | }; |
65 | ||
c32a9d71 | 66 | static struct fmr2 fmr2_card; |
1da177e4 LT |
67 | |
68 | /* hw precision is 12.5 kHz | |
1d80db56 | 69 | * It is only useful to give freq in interval of 200 (=0.0125Mhz), |
1da177e4 LT |
70 | * other bits will be truncated |
71 | */ | |
c32a9d71 HV |
72 | #define RSF16_ENCODE(x) ((x) / 200 + 856) |
73 | #define RSF16_MINFREQ (87 * 16000) | |
74 | #define RSF16_MAXFREQ (108 * 16000) | |
1da177e4 | 75 | |
c32a9d71 | 76 | static inline void wait(int n, int io) |
1da177e4 | 77 | { |
c32a9d71 HV |
78 | for (; n; --n) |
79 | inb(io); | |
1da177e4 LT |
80 | } |
81 | ||
c32a9d71 | 82 | static void outbits(int bits, unsigned int data, int nWait, int io) |
1da177e4 LT |
83 | { |
84 | int bit; | |
c32a9d71 HV |
85 | |
86 | for (; --bits >= 0;) { | |
87 | bit = (data >> bits) & 1; | |
88 | outb(bit, io); | |
89 | wait(nWait, io); | |
90 | outb(bit | 2, io); | |
91 | wait(nWait, io); | |
92 | outb(bit, io); | |
93 | wait(nWait, io); | |
1da177e4 LT |
94 | } |
95 | } | |
96 | ||
c32a9d71 | 97 | static inline void fmr2_mute(int io) |
1da177e4 | 98 | { |
c32a9d71 HV |
99 | outb(0x00, io); |
100 | wait(4, io); | |
1da177e4 LT |
101 | } |
102 | ||
c32a9d71 | 103 | static inline void fmr2_unmute(int io) |
1da177e4 | 104 | { |
c32a9d71 HV |
105 | outb(0x04, io); |
106 | wait(4, io); | |
1da177e4 LT |
107 | } |
108 | ||
c32a9d71 | 109 | static inline int fmr2_stereo_mode(int io) |
1da177e4 | 110 | { |
c32a9d71 HV |
111 | int n = inb(io); |
112 | ||
113 | outb(6, io); | |
114 | inb(io); | |
115 | n = ((n >> 3) & 1) ^ 1; | |
1da177e4 LT |
116 | debug_print((KERN_DEBUG "stereo: %d\n", n)); |
117 | return n; | |
118 | } | |
119 | ||
c32a9d71 | 120 | static int fmr2_product_info(struct fmr2 *dev) |
1da177e4 | 121 | { |
c32a9d71 HV |
122 | int n = inb(dev->io); |
123 | ||
1da177e4 | 124 | n &= 0xC1; |
c32a9d71 | 125 | if (n == 0) { |
1da177e4 LT |
126 | /* this should support volume set */ |
127 | dev->card_type = 12; | |
128 | return 0; | |
129 | } | |
130 | /* not volume (mine is 11) */ | |
c32a9d71 | 131 | dev->card_type = (n == 128) ? 11 : 0; |
1da177e4 LT |
132 | return n; |
133 | } | |
134 | ||
c32a9d71 | 135 | static inline int fmr2_getsigstr(struct fmr2 *dev) |
1da177e4 | 136 | { |
c32a9d71 HV |
137 | /* !!! works only if scanning freq */ |
138 | int res = 0xffff; | |
139 | ||
140 | outb(5, dev->io); | |
141 | wait(4, dev->io); | |
142 | if (!(inb(dev->io) & 1)) | |
143 | res = 0; | |
1da177e4 LT |
144 | debug_print((KERN_DEBUG "signal: %d\n", res)); |
145 | return res; | |
146 | } | |
147 | ||
148 | /* set frequency and unmute card */ | |
c32a9d71 | 149 | static int fmr2_setfreq(struct fmr2 *dev) |
1da177e4 | 150 | { |
1da177e4 LT |
151 | unsigned long freq = dev->curfreq; |
152 | ||
c32a9d71 | 153 | fmr2_mute(dev->io); |
1da177e4 LT |
154 | |
155 | /* 0x42 for mono output | |
156 | * 0x102 forward scanning | |
157 | * 0x182 scansione avanti | |
158 | */ | |
c32a9d71 HV |
159 | outbits(9, 0x2, 3, dev->io); |
160 | outbits(16, RSF16_ENCODE(freq), 2, dev->io); | |
1da177e4 | 161 | |
c32a9d71 | 162 | fmr2_unmute(dev->io); |
1da177e4 LT |
163 | |
164 | /* wait 0.11 sec */ | |
165 | msleep(110); | |
166 | ||
167 | /* NOTE if mute this stop radio | |
168 | you must set freq on unmute */ | |
c32a9d71 | 169 | dev->stereo = fmr2_stereo_mode(dev->io); |
1da177e4 LT |
170 | return 0; |
171 | } | |
172 | ||
e9c54999 | 173 | /* !!! not tested, in my card this doesn't work !!! */ |
c32a9d71 | 174 | static int fmr2_setvolume(struct fmr2 *dev) |
1da177e4 | 175 | { |
b2cb200f MCC |
176 | int vol[16] = { 0x021, 0x084, 0x090, 0x104, |
177 | 0x110, 0x204, 0x210, 0x402, | |
178 | 0x404, 0x408, 0x410, 0x801, | |
179 | 0x802, 0x804, 0x808, 0x810 }; | |
c32a9d71 | 180 | int i, a; |
b2cb200f | 181 | int n = vol[dev->curvol & 0x0f]; |
1da177e4 | 182 | |
b2cb200f MCC |
183 | if (dev->card_type != 11) |
184 | return 1; | |
1da177e4 | 185 | |
b2cb200f | 186 | for (i = 12; --i >= 0; ) { |
c32a9d71 HV |
187 | a = ((n >> i) & 1) << 6; /* if (a==0) a = 0; else a = 0x40; */ |
188 | outb(a | 4, dev->io); | |
189 | wait(4, dev->io); | |
190 | outb(a | 0x24, dev->io); | |
191 | wait(4, dev->io); | |
192 | outb(a | 4, dev->io); | |
193 | wait(4, dev->io); | |
1da177e4 | 194 | } |
b2cb200f | 195 | for (i = 6; --i >= 0; ) { |
1da177e4 | 196 | a = ((0x18 >> i) & 1) << 6; |
c32a9d71 HV |
197 | outb(a | 4, dev->io); |
198 | wait(4, dev->io); | |
199 | outb(a | 0x24, dev->io); | |
200 | wait(4, dev->io); | |
201 | outb(a | 4, dev->io); | |
202 | wait(4, dev->io); | |
1da177e4 | 203 | } |
c32a9d71 HV |
204 | wait(4, dev->io); |
205 | outb(0x14, dev->io); | |
1da177e4 LT |
206 | return 0; |
207 | } | |
208 | ||
34ab962d DL |
209 | static int vidioc_querycap(struct file *file, void *priv, |
210 | struct v4l2_capability *v) | |
1da177e4 | 211 | { |
34ab962d DL |
212 | strlcpy(v->driver, "radio-sf16fmr2", sizeof(v->driver)); |
213 | strlcpy(v->card, "SF16-FMR2 radio", sizeof(v->card)); | |
c32a9d71 | 214 | strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); |
34ab962d | 215 | v->version = RADIO_VERSION; |
c32a9d71 | 216 | v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; |
34ab962d DL |
217 | return 0; |
218 | } | |
219 | ||
220 | static int vidioc_g_tuner(struct file *file, void *priv, | |
221 | struct v4l2_tuner *v) | |
222 | { | |
c32a9d71 | 223 | struct fmr2 *fmr2 = video_drvdata(file); |
1da177e4 | 224 | |
34ab962d DL |
225 | if (v->index > 0) |
226 | return -EINVAL; | |
227 | ||
c32a9d71 | 228 | strlcpy(v->name, "FM", sizeof(v->name)); |
34ab962d DL |
229 | v->type = V4L2_TUNER_RADIO; |
230 | ||
1d80db56 HV |
231 | v->rangelow = RSF16_MINFREQ; |
232 | v->rangehigh = RSF16_MAXFREQ; | |
38092a44 HV |
233 | v->rxsubchans = fmr2->stereo ? V4L2_TUNER_SUB_STEREO : |
234 | V4L2_TUNER_SUB_MONO; | |
235 | v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW; | |
236 | v->audmode = V4L2_TUNER_MODE_STEREO; | |
c32a9d71 | 237 | mutex_lock(&fmr2->lock); |
34ab962d | 238 | v->signal = fmr2_getsigstr(fmr2); |
c32a9d71 | 239 | mutex_unlock(&fmr2->lock); |
34ab962d DL |
240 | return 0; |
241 | } | |
acda0e71 | 242 | |
34ab962d DL |
243 | static int vidioc_s_tuner(struct file *file, void *priv, |
244 | struct v4l2_tuner *v) | |
245 | { | |
c32a9d71 | 246 | return v->index ? -EINVAL : 0; |
34ab962d | 247 | } |
acda0e71 | 248 | |
34ab962d DL |
249 | static int vidioc_s_frequency(struct file *file, void *priv, |
250 | struct v4l2_frequency *f) | |
251 | { | |
c32a9d71 | 252 | struct fmr2 *fmr2 = video_drvdata(file); |
acda0e71 | 253 | |
a3a9e287 HV |
254 | if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) |
255 | return -EINVAL; | |
34ab962d | 256 | if (f->frequency < RSF16_MINFREQ || |
c32a9d71 | 257 | f->frequency > RSF16_MAXFREQ) |
34ab962d | 258 | return -EINVAL; |
c32a9d71 HV |
259 | /* rounding in steps of 200 to match the freq |
260 | that will be used */ | |
261 | fmr2->curfreq = (f->frequency / 200) * 200; | |
34ab962d DL |
262 | |
263 | /* set card freq (if not muted) */ | |
264 | if (fmr2->curvol && !fmr2->mute) { | |
c32a9d71 | 265 | mutex_lock(&fmr2->lock); |
34ab962d | 266 | fmr2_setfreq(fmr2); |
c32a9d71 | 267 | mutex_unlock(&fmr2->lock); |
34ab962d DL |
268 | } |
269 | return 0; | |
270 | } | |
acda0e71 | 271 | |
34ab962d DL |
272 | static int vidioc_g_frequency(struct file *file, void *priv, |
273 | struct v4l2_frequency *f) | |
274 | { | |
c32a9d71 | 275 | struct fmr2 *fmr2 = video_drvdata(file); |
acda0e71 | 276 | |
a3a9e287 HV |
277 | if (f->tuner != 0) |
278 | return -EINVAL; | |
34ab962d DL |
279 | f->type = V4L2_TUNER_RADIO; |
280 | f->frequency = fmr2->curfreq; | |
34ab962d DL |
281 | return 0; |
282 | } | |
acda0e71 | 283 | |
34ab962d DL |
284 | static int vidioc_queryctrl(struct file *file, void *priv, |
285 | struct v4l2_queryctrl *qc) | |
286 | { | |
c32a9d71 | 287 | struct fmr2 *fmr2 = video_drvdata(file); |
acda0e71 | 288 | |
c32a9d71 HV |
289 | switch (qc->id) { |
290 | case V4L2_CID_AUDIO_MUTE: | |
291 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); | |
292 | case V4L2_CID_AUDIO_VOLUME: | |
293 | /* Only card_type == 11 implements volume */ | |
294 | if (fmr2->card_type == 11) | |
295 | return v4l2_ctrl_query_fill(qc, 0, 15, 1, 0); | |
296 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0); | |
34ab962d DL |
297 | } |
298 | return -EINVAL; | |
299 | } | |
300 | ||
301 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
302 | struct v4l2_control *ctrl) | |
303 | { | |
c32a9d71 | 304 | struct fmr2 *fmr2 = video_drvdata(file); |
34ab962d DL |
305 | |
306 | switch (ctrl->id) { | |
307 | case V4L2_CID_AUDIO_MUTE: | |
308 | ctrl->value = fmr2->mute; | |
309 | return 0; | |
310 | case V4L2_CID_AUDIO_VOLUME: | |
311 | ctrl->value = fmr2->curvol; | |
312 | return 0; | |
313 | } | |
314 | return -EINVAL; | |
315 | } | |
316 | ||
317 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
318 | struct v4l2_control *ctrl) | |
319 | { | |
c32a9d71 | 320 | struct fmr2 *fmr2 = video_drvdata(file); |
34ab962d DL |
321 | |
322 | switch (ctrl->id) { | |
323 | case V4L2_CID_AUDIO_MUTE: | |
324 | fmr2->mute = ctrl->value; | |
34ab962d DL |
325 | break; |
326 | case V4L2_CID_AUDIO_VOLUME: | |
c32a9d71 | 327 | fmr2->curvol = ctrl->value; |
34ab962d DL |
328 | break; |
329 | default: | |
330 | return -EINVAL; | |
331 | } | |
332 | ||
1da177e4 | 333 | #ifdef DEBUG |
34ab962d DL |
334 | if (fmr2->curvol && !fmr2->mute) |
335 | printk(KERN_DEBUG "unmute\n"); | |
336 | else | |
337 | printk(KERN_DEBUG "mute\n"); | |
1da177e4 | 338 | #endif |
acda0e71 | 339 | |
c32a9d71 | 340 | mutex_lock(&fmr2->lock); |
34ab962d DL |
341 | if (fmr2->curvol && !fmr2->mute) { |
342 | fmr2_setvolume(fmr2); | |
b2cb200f | 343 | /* Set frequency and unmute card */ |
34ab962d DL |
344 | fmr2_setfreq(fmr2); |
345 | } else | |
c32a9d71 HV |
346 | fmr2_mute(fmr2->io); |
347 | mutex_unlock(&fmr2->lock); | |
34ab962d DL |
348 | return 0; |
349 | } | |
350 | ||
351 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
352 | { | |
353 | *i = 0; | |
354 | return 0; | |
1da177e4 LT |
355 | } |
356 | ||
34ab962d DL |
357 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) |
358 | { | |
c32a9d71 | 359 | return i ? -EINVAL : 0; |
34ab962d DL |
360 | } |
361 | ||
c32a9d71 | 362 | static int vidioc_g_audio(struct file *file, void *priv, |
34ab962d DL |
363 | struct v4l2_audio *a) |
364 | { | |
c32a9d71 HV |
365 | a->index = 0; |
366 | strlcpy(a->name, "Radio", sizeof(a->name)); | |
367 | a->capability = V4L2_AUDCAP_STEREO; | |
34ab962d | 368 | return 0; |
1da177e4 LT |
369 | } |
370 | ||
c32a9d71 HV |
371 | static int vidioc_s_audio(struct file *file, void *priv, |
372 | struct v4l2_audio *a) | |
373 | { | |
374 | return a->index ? -EINVAL : 0; | |
375 | } | |
1da177e4 | 376 | |
bec43661 | 377 | static const struct v4l2_file_operations fmr2_fops = { |
1da177e4 | 378 | .owner = THIS_MODULE, |
32958fdd | 379 | .unlocked_ioctl = video_ioctl2, |
1da177e4 LT |
380 | }; |
381 | ||
a399810c | 382 | static const struct v4l2_ioctl_ops fmr2_ioctl_ops = { |
34ab962d DL |
383 | .vidioc_querycap = vidioc_querycap, |
384 | .vidioc_g_tuner = vidioc_g_tuner, | |
385 | .vidioc_s_tuner = vidioc_s_tuner, | |
386 | .vidioc_g_audio = vidioc_g_audio, | |
387 | .vidioc_s_audio = vidioc_s_audio, | |
388 | .vidioc_g_input = vidioc_g_input, | |
389 | .vidioc_s_input = vidioc_s_input, | |
390 | .vidioc_g_frequency = vidioc_g_frequency, | |
391 | .vidioc_s_frequency = vidioc_s_frequency, | |
392 | .vidioc_queryctrl = vidioc_queryctrl, | |
393 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
394 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1da177e4 LT |
395 | }; |
396 | ||
397 | static int __init fmr2_init(void) | |
398 | { | |
c32a9d71 HV |
399 | struct fmr2 *fmr2 = &fmr2_card; |
400 | struct v4l2_device *v4l2_dev = &fmr2->v4l2_dev; | |
401 | int res; | |
402 | ||
403 | strlcpy(v4l2_dev->name, "sf16fmr2", sizeof(v4l2_dev->name)); | |
404 | fmr2->io = io; | |
405 | fmr2->stereo = 1; | |
c32a9d71 HV |
406 | mutex_init(&fmr2->lock); |
407 | ||
408 | if (!request_region(fmr2->io, 2, "sf16fmr2")) { | |
409 | v4l2_err(v4l2_dev, "request_region failed!\n"); | |
1da177e4 LT |
410 | return -EBUSY; |
411 | } | |
412 | ||
c32a9d71 HV |
413 | res = v4l2_device_register(NULL, v4l2_dev); |
414 | if (res < 0) { | |
415 | release_region(fmr2->io, 2); | |
416 | v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); | |
417 | return res; | |
1da177e4 LT |
418 | } |
419 | ||
c32a9d71 HV |
420 | strlcpy(fmr2->vdev.name, v4l2_dev->name, sizeof(fmr2->vdev.name)); |
421 | fmr2->vdev.v4l2_dev = v4l2_dev; | |
422 | fmr2->vdev.fops = &fmr2_fops; | |
423 | fmr2->vdev.ioctl_ops = &fmr2_ioctl_ops; | |
424 | fmr2->vdev.release = video_device_release_empty; | |
425 | video_set_drvdata(&fmr2->vdev, fmr2); | |
b2cb200f | 426 | |
32958fdd HV |
427 | /* mute card - prevents noisy bootups */ |
428 | fmr2_mute(fmr2->io); | |
429 | fmr2_product_info(fmr2); | |
430 | ||
c32a9d71 HV |
431 | if (video_register_device(&fmr2->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { |
432 | v4l2_device_unregister(v4l2_dev); | |
433 | release_region(fmr2->io, 2); | |
434 | return -EINVAL; | |
435 | } | |
b2cb200f | 436 | |
c32a9d71 | 437 | v4l2_info(v4l2_dev, "SF16FMR2 radio card driver at 0x%x.\n", fmr2->io); |
c32a9d71 | 438 | debug_print((KERN_DEBUG "card_type %d\n", fmr2->card_type)); |
1da177e4 LT |
439 | return 0; |
440 | } | |
441 | ||
c32a9d71 | 442 | static void __exit fmr2_exit(void) |
1da177e4 | 443 | { |
c32a9d71 HV |
444 | struct fmr2 *fmr2 = &fmr2_card; |
445 | ||
446 | video_unregister_device(&fmr2->vdev); | |
447 | v4l2_device_unregister(&fmr2->v4l2_dev); | |
448 | release_region(fmr2->io, 2); | |
1da177e4 LT |
449 | } |
450 | ||
451 | module_init(fmr2_init); | |
c32a9d71 | 452 | module_exit(fmr2_exit); |
1da177e4 LT |
453 | |
454 | #ifndef MODULE | |
455 | ||
456 | static int __init fmr2_setup_io(char *str) | |
457 | { | |
458 | get_option(&str, &io); | |
459 | return 1; | |
460 | } | |
461 | ||
462 | __setup("sf16fmr2=", fmr2_setup_io); | |
463 | ||
464 | #endif |