1 /* SF16FMR2 radio driver for Linux radio support
2 * heavily based on fmi driver...
3 * (c) 2000-2002 Ziglio Frediano, freddy77@angelfire.com
5 * Notes on the hardware
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
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)
14 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
17 #include <linux/module.h> /* Modules */
18 #include <linux/init.h> /* Initdata */
19 #include <linux/ioport.h> /* request_region */
20 #include <linux/delay.h> /* udelay */
21 #include <linux/videodev2.h> /* kernel radio structs */
22 #include <linux/mutex.h>
23 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
24 #include <linux/io.h> /* outb, outb_p */
25 #include <linux/uaccess.h> /* copy to/from user */
26 #include <media/v4l2-device.h>
27 #include <media/v4l2-ioctl.h>
29 MODULE_AUTHOR("Ziglio Frediano, freddy77@angelfire.com");
30 MODULE_DESCRIPTION("A driver for the SF16FMR2 radio.");
31 MODULE_LICENSE("GPL");
33 static int io = 0x384;
34 static int radio_nr = -1;
36 module_param(io, int, 0);
37 MODULE_PARM_DESC(io, "I/O address of the SF16FMR2 card (should be 0x384, if do not work try 0x284)");
38 module_param(radio_nr, int, 0);
40 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
42 #define AUD_VOL_INDEX 1
48 # define debug_print(s) printk s
50 # define debug_print(s)
53 /* this should be static vars for module size */
56 struct v4l2_device v4l2_dev;
57 struct video_device vdev;
60 int curvol; /* 0-15 */
62 int stereo; /* card is producing stereo audio */
63 unsigned long curfreq; /* freq in kHz */
68 static struct fmr2 fmr2_card;
70 /* hw precision is 12.5 kHz
71 * It is only useful to give freq in intervall of 200 (=0.0125Mhz),
72 * other bits will be truncated
74 #define RSF16_ENCODE(x) ((x) / 200 + 856)
75 #define RSF16_MINFREQ (87 * 16000)
76 #define RSF16_MAXFREQ (108 * 16000)
78 static inline void wait(int n, int io)
84 static void outbits(int bits, unsigned int data, int nWait, int io)
88 for (; --bits >= 0;) {
89 bit = (data >> bits) & 1;
99 static inline void fmr2_mute(int io)
105 static inline void fmr2_unmute(int io)
111 static inline int fmr2_stereo_mode(int io)
117 n = ((n >> 3) & 1) ^ 1;
118 debug_print((KERN_DEBUG "stereo: %d\n", n));
122 static int fmr2_product_info(struct fmr2 *dev)
124 int n = inb(dev->io);
128 /* this should support volume set */
132 /* not volume (mine is 11) */
133 dev->card_type = (n == 128) ? 11 : 0;
137 static inline int fmr2_getsigstr(struct fmr2 *dev)
139 /* !!! works only if scanning freq */
144 if (!(inb(dev->io) & 1))
146 debug_print((KERN_DEBUG "signal: %d\n", res));
150 /* set frequency and unmute card */
151 static int fmr2_setfreq(struct fmr2 *dev)
153 unsigned long freq = dev->curfreq;
157 /* 0x42 for mono output
158 * 0x102 forward scanning
159 * 0x182 scansione avanti
161 outbits(9, 0x2, 3, dev->io);
162 outbits(16, RSF16_ENCODE(freq), 2, dev->io);
164 fmr2_unmute(dev->io);
169 /* NOTE if mute this stop radio
170 you must set freq on unmute */
171 dev->stereo = fmr2_stereo_mode(dev->io);
175 /* !!! not tested, in my card this does't work !!! */
176 static int fmr2_setvolume(struct fmr2 *dev)
178 int vol[16] = { 0x021, 0x084, 0x090, 0x104,
179 0x110, 0x204, 0x210, 0x402,
180 0x404, 0x408, 0x410, 0x801,
181 0x802, 0x804, 0x808, 0x810 };
183 int n = vol[dev->curvol & 0x0f];
185 if (dev->card_type != 11)
188 for (i = 12; --i >= 0; ) {
189 a = ((n >> i) & 1) << 6; /* if (a==0) a = 0; else a = 0x40; */
190 outb(a | 4, dev->io);
192 outb(a | 0x24, dev->io);
194 outb(a | 4, dev->io);
197 for (i = 6; --i >= 0; ) {
198 a = ((0x18 >> i) & 1) << 6;
199 outb(a | 4, dev->io);
201 outb(a | 0x24, dev->io);
203 outb(a | 4, dev->io);
211 static int vidioc_querycap(struct file *file, void *priv,
212 struct v4l2_capability *v)
214 strlcpy(v->driver, "radio-sf16fmr2", sizeof(v->driver));
215 strlcpy(v->card, "SF16-FMR2 radio", sizeof(v->card));
216 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
217 v->version = RADIO_VERSION;
218 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
222 static int vidioc_g_tuner(struct file *file, void *priv,
223 struct v4l2_tuner *v)
226 struct fmr2 *fmr2 = video_drvdata(file);
231 strlcpy(v->name, "FM", sizeof(v->name));
232 v->type = V4L2_TUNER_RADIO;
234 mult = (fmr2->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000;
235 v->rangelow = RSF16_MINFREQ / mult;
236 v->rangehigh = RSF16_MAXFREQ / mult;
237 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_MODE_STEREO;
238 v->capability = fmr2->flags&V4L2_TUNER_CAP_LOW;
239 v->audmode = fmr2->stereo ? V4L2_TUNER_MODE_STEREO:
240 V4L2_TUNER_MODE_MONO;
241 mutex_lock(&fmr2->lock);
242 v->signal = fmr2_getsigstr(fmr2);
243 mutex_unlock(&fmr2->lock);
247 static int vidioc_s_tuner(struct file *file, void *priv,
248 struct v4l2_tuner *v)
250 return v->index ? -EINVAL : 0;
253 static int vidioc_s_frequency(struct file *file, void *priv,
254 struct v4l2_frequency *f)
256 struct fmr2 *fmr2 = video_drvdata(file);
258 if (!(fmr2->flags & V4L2_TUNER_CAP_LOW))
259 f->frequency *= 1000;
260 if (f->frequency < RSF16_MINFREQ ||
261 f->frequency > RSF16_MAXFREQ)
263 /* rounding in steps of 200 to match the freq
265 fmr2->curfreq = (f->frequency / 200) * 200;
267 /* set card freq (if not muted) */
268 if (fmr2->curvol && !fmr2->mute) {
269 mutex_lock(&fmr2->lock);
271 mutex_unlock(&fmr2->lock);
276 static int vidioc_g_frequency(struct file *file, void *priv,
277 struct v4l2_frequency *f)
279 struct fmr2 *fmr2 = video_drvdata(file);
281 f->type = V4L2_TUNER_RADIO;
282 f->frequency = fmr2->curfreq;
283 if (!(fmr2->flags & V4L2_TUNER_CAP_LOW))
284 f->frequency /= 1000;
288 static int vidioc_queryctrl(struct file *file, void *priv,
289 struct v4l2_queryctrl *qc)
291 struct fmr2 *fmr2 = video_drvdata(file);
294 case V4L2_CID_AUDIO_MUTE:
295 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
296 case V4L2_CID_AUDIO_VOLUME:
297 /* Only card_type == 11 implements volume */
298 if (fmr2->card_type == 11)
299 return v4l2_ctrl_query_fill(qc, 0, 15, 1, 0);
300 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
305 static int vidioc_g_ctrl(struct file *file, void *priv,
306 struct v4l2_control *ctrl)
308 struct fmr2 *fmr2 = video_drvdata(file);
311 case V4L2_CID_AUDIO_MUTE:
312 ctrl->value = fmr2->mute;
314 case V4L2_CID_AUDIO_VOLUME:
315 ctrl->value = fmr2->curvol;
321 static int vidioc_s_ctrl(struct file *file, void *priv,
322 struct v4l2_control *ctrl)
324 struct fmr2 *fmr2 = video_drvdata(file);
327 case V4L2_CID_AUDIO_MUTE:
328 fmr2->mute = ctrl->value;
330 case V4L2_CID_AUDIO_VOLUME:
331 fmr2->curvol = ctrl->value;
338 if (fmr2->curvol && !fmr2->mute)
339 printk(KERN_DEBUG "unmute\n");
341 printk(KERN_DEBUG "mute\n");
344 mutex_lock(&fmr2->lock);
345 if (fmr2->curvol && !fmr2->mute) {
346 fmr2_setvolume(fmr2);
347 /* Set frequency and unmute card */
351 mutex_unlock(&fmr2->lock);
355 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
361 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
363 return i ? -EINVAL : 0;
366 static int vidioc_g_audio(struct file *file, void *priv,
367 struct v4l2_audio *a)
370 strlcpy(a->name, "Radio", sizeof(a->name));
371 a->capability = V4L2_AUDCAP_STEREO;
375 static int vidioc_s_audio(struct file *file, void *priv,
376 struct v4l2_audio *a)
378 return a->index ? -EINVAL : 0;
381 static int fmr2_open(struct file *file)
386 static int fmr2_release(struct file *file)
391 static const struct v4l2_file_operations fmr2_fops = {
392 .owner = THIS_MODULE,
394 .release = fmr2_release,
395 .ioctl = video_ioctl2,
398 static const struct v4l2_ioctl_ops fmr2_ioctl_ops = {
399 .vidioc_querycap = vidioc_querycap,
400 .vidioc_g_tuner = vidioc_g_tuner,
401 .vidioc_s_tuner = vidioc_s_tuner,
402 .vidioc_g_audio = vidioc_g_audio,
403 .vidioc_s_audio = vidioc_s_audio,
404 .vidioc_g_input = vidioc_g_input,
405 .vidioc_s_input = vidioc_s_input,
406 .vidioc_g_frequency = vidioc_g_frequency,
407 .vidioc_s_frequency = vidioc_s_frequency,
408 .vidioc_queryctrl = vidioc_queryctrl,
409 .vidioc_g_ctrl = vidioc_g_ctrl,
410 .vidioc_s_ctrl = vidioc_s_ctrl,
413 static int __init fmr2_init(void)
415 struct fmr2 *fmr2 = &fmr2_card;
416 struct v4l2_device *v4l2_dev = &fmr2->v4l2_dev;
419 strlcpy(v4l2_dev->name, "sf16fmr2", sizeof(v4l2_dev->name));
422 fmr2->flags = V4L2_TUNER_CAP_LOW;
423 mutex_init(&fmr2->lock);
425 if (!request_region(fmr2->io, 2, "sf16fmr2")) {
426 v4l2_err(v4l2_dev, "request_region failed!\n");
430 res = v4l2_device_register(NULL, v4l2_dev);
432 release_region(fmr2->io, 2);
433 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
437 strlcpy(fmr2->vdev.name, v4l2_dev->name, sizeof(fmr2->vdev.name));
438 fmr2->vdev.v4l2_dev = v4l2_dev;
439 fmr2->vdev.fops = &fmr2_fops;
440 fmr2->vdev.ioctl_ops = &fmr2_ioctl_ops;
441 fmr2->vdev.release = video_device_release_empty;
442 video_set_drvdata(&fmr2->vdev, fmr2);
444 if (video_register_device(&fmr2->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
445 v4l2_device_unregister(v4l2_dev);
446 release_region(fmr2->io, 2);
450 v4l2_info(v4l2_dev, "SF16FMR2 radio card driver at 0x%x.\n", fmr2->io);
451 /* mute card - prevents noisy bootups */
452 mutex_lock(&fmr2->lock);
454 fmr2_product_info(fmr2);
455 mutex_unlock(&fmr2->lock);
456 debug_print((KERN_DEBUG "card_type %d\n", fmr2->card_type));
460 static void __exit fmr2_exit(void)
462 struct fmr2 *fmr2 = &fmr2_card;
464 video_unregister_device(&fmr2->vdev);
465 v4l2_device_unregister(&fmr2->v4l2_dev);
466 release_region(fmr2->io, 2);
469 module_init(fmr2_init);
470 module_exit(fmr2_exit);
474 static int __init fmr2_setup_io(char *str)
476 get_option(&str, &io);
480 __setup("sf16fmr2=", fmr2_setup_io);