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17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/ioport.h>
20#include <linux/delay.h>
21#include <linux/videodev2.h>
22#include <linux/mutex.h>
23#include <linux/version.h>
24#include <linux/io.h>
25#include <media/v4l2-device.h>
26#include <media/v4l2-ioctl.h>
27
28MODULE_AUTHOR("Ziglio Frediano, freddy77@angelfire.com");
29MODULE_DESCRIPTION("A driver for the SF16FMR2 radio.");
30MODULE_LICENSE("GPL");
31
32static int io = 0x384;
33static int radio_nr = -1;
34
35module_param(io, int, 0);
36MODULE_PARM_DESC(io, "I/O address of the SF16FMR2 card (should be 0x384, if do not work try 0x284)");
37module_param(radio_nr, int, 0);
38
39#define RADIO_VERSION KERNEL_VERSION(0,0,2)
40
41#define AUD_VOL_INDEX 1
42
43#undef DEBUG
44
45
46#ifdef DEBUG
47# define debug_print(s) printk s
48#else
49# define debug_print(s)
50#endif
51
52
53struct fmr2
54{
55 struct v4l2_device v4l2_dev;
56 struct video_device vdev;
57 struct mutex lock;
58 int io;
59 int curvol;
60 int mute;
61 int stereo;
62 unsigned long curfreq;
63 int card_type;
64};
65
66static struct fmr2 fmr2_card;
67
68
69
70
71
72#define RSF16_ENCODE(x) ((x) / 200 + 856)
73#define RSF16_MINFREQ (87 * 16000)
74#define RSF16_MAXFREQ (108 * 16000)
75
76static inline void wait(int n, int io)
77{
78 for (; n; --n)
79 inb(io);
80}
81
82static void outbits(int bits, unsigned int data, int nWait, int io)
83{
84 int bit;
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);
94 }
95}
96
97static inline void fmr2_mute(int io)
98{
99 outb(0x00, io);
100 wait(4, io);
101}
102
103static inline void fmr2_unmute(int io)
104{
105 outb(0x04, io);
106 wait(4, io);
107}
108
109static inline int fmr2_stereo_mode(int io)
110{
111 int n = inb(io);
112
113 outb(6, io);
114 inb(io);
115 n = ((n >> 3) & 1) ^ 1;
116 debug_print((KERN_DEBUG "stereo: %d\n", n));
117 return n;
118}
119
120static int fmr2_product_info(struct fmr2 *dev)
121{
122 int n = inb(dev->io);
123
124 n &= 0xC1;
125 if (n == 0) {
126
127 dev->card_type = 12;
128 return 0;
129 }
130
131 dev->card_type = (n == 128) ? 11 : 0;
132 return n;
133}
134
135static inline int fmr2_getsigstr(struct fmr2 *dev)
136{
137
138 int res = 0xffff;
139
140 outb(5, dev->io);
141 wait(4, dev->io);
142 if (!(inb(dev->io) & 1))
143 res = 0;
144 debug_print((KERN_DEBUG "signal: %d\n", res));
145 return res;
146}
147
148
149static int fmr2_setfreq(struct fmr2 *dev)
150{
151 unsigned long freq = dev->curfreq;
152
153 fmr2_mute(dev->io);
154
155
156
157
158
159 outbits(9, 0x2, 3, dev->io);
160 outbits(16, RSF16_ENCODE(freq), 2, dev->io);
161
162 fmr2_unmute(dev->io);
163
164
165 msleep(110);
166
167
168
169 dev->stereo = fmr2_stereo_mode(dev->io);
170 return 0;
171}
172
173
174static int fmr2_setvolume(struct fmr2 *dev)
175{
176 int vol[16] = { 0x021, 0x084, 0x090, 0x104,
177 0x110, 0x204, 0x210, 0x402,
178 0x404, 0x408, 0x410, 0x801,
179 0x802, 0x804, 0x808, 0x810 };
180 int i, a;
181 int n = vol[dev->curvol & 0x0f];
182
183 if (dev->card_type != 11)
184 return 1;
185
186 for (i = 12; --i >= 0; ) {
187 a = ((n >> i) & 1) << 6;
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);
194 }
195 for (i = 6; --i >= 0; ) {
196 a = ((0x18 >> i) & 1) << 6;
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);
203 }
204 wait(4, dev->io);
205 outb(0x14, dev->io);
206 return 0;
207}
208
209static int vidioc_querycap(struct file *file, void *priv,
210 struct v4l2_capability *v)
211{
212 strlcpy(v->driver, "radio-sf16fmr2", sizeof(v->driver));
213 strlcpy(v->card, "SF16-FMR2 radio", sizeof(v->card));
214 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
215 v->version = RADIO_VERSION;
216 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
217 return 0;
218}
219
220static int vidioc_g_tuner(struct file *file, void *priv,
221 struct v4l2_tuner *v)
222{
223 struct fmr2 *fmr2 = video_drvdata(file);
224
225 if (v->index > 0)
226 return -EINVAL;
227
228 strlcpy(v->name, "FM", sizeof(v->name));
229 v->type = V4L2_TUNER_RADIO;
230
231 v->rangelow = RSF16_MINFREQ;
232 v->rangehigh = RSF16_MAXFREQ;
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;
237 mutex_lock(&fmr2->lock);
238 v->signal = fmr2_getsigstr(fmr2);
239 mutex_unlock(&fmr2->lock);
240 return 0;
241}
242
243static int vidioc_s_tuner(struct file *file, void *priv,
244 struct v4l2_tuner *v)
245{
246 return v->index ? -EINVAL : 0;
247}
248
249static int vidioc_s_frequency(struct file *file, void *priv,
250 struct v4l2_frequency *f)
251{
252 struct fmr2 *fmr2 = video_drvdata(file);
253
254 if (f->frequency < RSF16_MINFREQ ||
255 f->frequency > RSF16_MAXFREQ)
256 return -EINVAL;
257
258
259 fmr2->curfreq = (f->frequency / 200) * 200;
260
261
262 if (fmr2->curvol && !fmr2->mute) {
263 mutex_lock(&fmr2->lock);
264 fmr2_setfreq(fmr2);
265 mutex_unlock(&fmr2->lock);
266 }
267 return 0;
268}
269
270static int vidioc_g_frequency(struct file *file, void *priv,
271 struct v4l2_frequency *f)
272{
273 struct fmr2 *fmr2 = video_drvdata(file);
274
275 f->type = V4L2_TUNER_RADIO;
276 f->frequency = fmr2->curfreq;
277 return 0;
278}
279
280static int vidioc_queryctrl(struct file *file, void *priv,
281 struct v4l2_queryctrl *qc)
282{
283 struct fmr2 *fmr2 = video_drvdata(file);
284
285 switch (qc->id) {
286 case V4L2_CID_AUDIO_MUTE:
287 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
288 case V4L2_CID_AUDIO_VOLUME:
289
290 if (fmr2->card_type == 11)
291 return v4l2_ctrl_query_fill(qc, 0, 15, 1, 0);
292 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
293 }
294 return -EINVAL;
295}
296
297static int vidioc_g_ctrl(struct file *file, void *priv,
298 struct v4l2_control *ctrl)
299{
300 struct fmr2 *fmr2 = video_drvdata(file);
301
302 switch (ctrl->id) {
303 case V4L2_CID_AUDIO_MUTE:
304 ctrl->value = fmr2->mute;
305 return 0;
306 case V4L2_CID_AUDIO_VOLUME:
307 ctrl->value = fmr2->curvol;
308 return 0;
309 }
310 return -EINVAL;
311}
312
313static int vidioc_s_ctrl(struct file *file, void *priv,
314 struct v4l2_control *ctrl)
315{
316 struct fmr2 *fmr2 = video_drvdata(file);
317
318 switch (ctrl->id) {
319 case V4L2_CID_AUDIO_MUTE:
320 fmr2->mute = ctrl->value;
321 break;
322 case V4L2_CID_AUDIO_VOLUME:
323 fmr2->curvol = ctrl->value;
324 break;
325 default:
326 return -EINVAL;
327 }
328
329#ifdef DEBUG
330 if (fmr2->curvol && !fmr2->mute)
331 printk(KERN_DEBUG "unmute\n");
332 else
333 printk(KERN_DEBUG "mute\n");
334#endif
335
336 mutex_lock(&fmr2->lock);
337 if (fmr2->curvol && !fmr2->mute) {
338 fmr2_setvolume(fmr2);
339
340 fmr2_setfreq(fmr2);
341 } else
342 fmr2_mute(fmr2->io);
343 mutex_unlock(&fmr2->lock);
344 return 0;
345}
346
347static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
348{
349 *i = 0;
350 return 0;
351}
352
353static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
354{
355 return i ? -EINVAL : 0;
356}
357
358static int vidioc_g_audio(struct file *file, void *priv,
359 struct v4l2_audio *a)
360{
361 a->index = 0;
362 strlcpy(a->name, "Radio", sizeof(a->name));
363 a->capability = V4L2_AUDCAP_STEREO;
364 return 0;
365}
366
367static int vidioc_s_audio(struct file *file, void *priv,
368 struct v4l2_audio *a)
369{
370 return a->index ? -EINVAL : 0;
371}
372
373static const struct v4l2_file_operations fmr2_fops = {
374 .owner = THIS_MODULE,
375 .ioctl = video_ioctl2,
376};
377
378static const struct v4l2_ioctl_ops fmr2_ioctl_ops = {
379 .vidioc_querycap = vidioc_querycap,
380 .vidioc_g_tuner = vidioc_g_tuner,
381 .vidioc_s_tuner = vidioc_s_tuner,
382 .vidioc_g_audio = vidioc_g_audio,
383 .vidioc_s_audio = vidioc_s_audio,
384 .vidioc_g_input = vidioc_g_input,
385 .vidioc_s_input = vidioc_s_input,
386 .vidioc_g_frequency = vidioc_g_frequency,
387 .vidioc_s_frequency = vidioc_s_frequency,
388 .vidioc_queryctrl = vidioc_queryctrl,
389 .vidioc_g_ctrl = vidioc_g_ctrl,
390 .vidioc_s_ctrl = vidioc_s_ctrl,
391};
392
393static int __init fmr2_init(void)
394{
395 struct fmr2 *fmr2 = &fmr2_card;
396 struct v4l2_device *v4l2_dev = &fmr2->v4l2_dev;
397 int res;
398
399 strlcpy(v4l2_dev->name, "sf16fmr2", sizeof(v4l2_dev->name));
400 fmr2->io = io;
401 fmr2->stereo = 1;
402 mutex_init(&fmr2->lock);
403
404 if (!request_region(fmr2->io, 2, "sf16fmr2")) {
405 v4l2_err(v4l2_dev, "request_region failed!\n");
406 return -EBUSY;
407 }
408
409 res = v4l2_device_register(NULL, v4l2_dev);
410 if (res < 0) {
411 release_region(fmr2->io, 2);
412 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
413 return res;
414 }
415
416 strlcpy(fmr2->vdev.name, v4l2_dev->name, sizeof(fmr2->vdev.name));
417 fmr2->vdev.v4l2_dev = v4l2_dev;
418 fmr2->vdev.fops = &fmr2_fops;
419 fmr2->vdev.ioctl_ops = &fmr2_ioctl_ops;
420 fmr2->vdev.release = video_device_release_empty;
421 video_set_drvdata(&fmr2->vdev, fmr2);
422
423 if (video_register_device(&fmr2->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
424 v4l2_device_unregister(v4l2_dev);
425 release_region(fmr2->io, 2);
426 return -EINVAL;
427 }
428
429 v4l2_info(v4l2_dev, "SF16FMR2 radio card driver at 0x%x.\n", fmr2->io);
430
431 mutex_lock(&fmr2->lock);
432 fmr2_mute(fmr2->io);
433 fmr2_product_info(fmr2);
434 mutex_unlock(&fmr2->lock);
435 debug_print((KERN_DEBUG "card_type %d\n", fmr2->card_type));
436 return 0;
437}
438
439static void __exit fmr2_exit(void)
440{
441 struct fmr2 *fmr2 = &fmr2_card;
442
443 video_unregister_device(&fmr2->vdev);
444 v4l2_device_unregister(&fmr2->v4l2_dev);
445 release_region(fmr2->io, 2);
446}
447
448module_init(fmr2_init);
449module_exit(fmr2_exit);
450
451#ifndef MODULE
452
453static int __init fmr2_setup_io(char *str)
454{
455 get_option(&str, &io);
456 return 1;
457}
458
459__setup("sf16fmr2=", fmr2_setup_io);
460
461#endif
462
