Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* radiotrack (radioreveal) driver for Linux radio support |
2 | * (c) 1997 M. Kirkwood | |
46ff2c72 | 3 | * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> |
d9b01449 | 4 | * Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
5 | * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org> |
6 | * | |
7 | * History: | |
8 | * 1999-02-24 Russell Kroll <rkroll@exploits.org> | |
9 | * Fine tuning/VIDEO_TUNER_LOW | |
10 | * Frequency range expanded to start at 87 MHz | |
11 | * | |
12 | * TODO: Allow for more than one of these foolish entities :-) | |
13 | * | |
14 | * Notes on the hardware (reverse engineered from other peoples' | |
15 | * reverse engineering of AIMS' code :-) | |
16 | * | |
17 | * Frequency control is done digitally -- ie out(port,encodefreq(95.8)); | |
18 | * | |
19 | * The signal strength query is unsurprisingly inaccurate. And it seems | |
20 | * to indicate that (on my card, at least) the frequency setting isn't | |
21 | * too great. (I have to tune up .025MHz from what the freq should be | |
22 | * to get a report that the thing is tuned.) | |
23 | * | |
24 | * Volume control is (ugh) analogue: | |
25 | * out(port, start_increasing_volume); | |
26 | * wait(a_wee_while); | |
27 | * out(port, stop_changing_the_volume); | |
4286c6f6 | 28 | * |
1da177e4 LT |
29 | */ |
30 | ||
31 | #include <linux/module.h> /* Modules */ | |
32 | #include <linux/init.h> /* Initdata */ | |
fb911ee8 | 33 | #include <linux/ioport.h> /* request_region */ |
1da177e4 LT |
34 | #include <linux/delay.h> /* udelay */ |
35 | #include <asm/io.h> /* outb, outb_p */ | |
36 | #include <asm/uaccess.h> /* copy to/from user */ | |
46ff2c72 | 37 | #include <linux/videodev2.h> /* kernel radio structs */ |
5e87efa3 | 38 | #include <media/v4l2-common.h> |
35ea11ff | 39 | #include <media/v4l2-ioctl.h> |
1da177e4 | 40 | |
46ff2c72 MCC |
41 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ |
42 | #define RADIO_VERSION KERNEL_VERSION(0,0,2) | |
43 | ||
1da177e4 LT |
44 | #ifndef CONFIG_RADIO_RTRACK_PORT |
45 | #define CONFIG_RADIO_RTRACK_PORT -1 | |
46 | #endif | |
47 | ||
4286c6f6 | 48 | static int io = CONFIG_RADIO_RTRACK_PORT; |
1da177e4 | 49 | static int radio_nr = -1; |
3593cab5 | 50 | static struct mutex lock; |
1da177e4 LT |
51 | |
52 | struct rt_device | |
53 | { | |
3ca685aa | 54 | unsigned long in_use; |
1da177e4 LT |
55 | int port; |
56 | int curvol; | |
57 | unsigned long curfreq; | |
58 | int muted; | |
59 | }; | |
60 | ||
61 | ||
62 | /* local things */ | |
63 | ||
64 | static void sleep_delay(long n) | |
65 | { | |
66 | /* Sleep nicely for 'n' uS */ | |
a2d66a37 | 67 | int d=n/msecs_to_jiffies(1000); |
1da177e4 LT |
68 | if(!d) |
69 | udelay(n); | |
70 | else | |
71 | msleep(jiffies_to_msecs(d)); | |
72 | } | |
73 | ||
74 | static void rt_decvol(void) | |
75 | { | |
76 | outb(0x58, io); /* volume down + sigstr + on */ | |
77 | sleep_delay(100000); | |
78 | outb(0xd8, io); /* volume steady + sigstr + on */ | |
79 | } | |
80 | ||
81 | static void rt_incvol(void) | |
82 | { | |
83 | outb(0x98, io); /* volume up + sigstr + on */ | |
84 | sleep_delay(100000); | |
85 | outb(0xd8, io); /* volume steady + sigstr + on */ | |
86 | } | |
87 | ||
88 | static void rt_mute(struct rt_device *dev) | |
89 | { | |
90 | dev->muted = 1; | |
3593cab5 | 91 | mutex_lock(&lock); |
1da177e4 | 92 | outb(0xd0, io); /* volume steady, off */ |
3593cab5 | 93 | mutex_unlock(&lock); |
1da177e4 LT |
94 | } |
95 | ||
96 | static int rt_setvol(struct rt_device *dev, int vol) | |
97 | { | |
98 | int i; | |
99 | ||
3593cab5 | 100 | mutex_lock(&lock); |
4286c6f6 | 101 | |
1da177e4 LT |
102 | if(vol == dev->curvol) { /* requested volume = current */ |
103 | if (dev->muted) { /* user is unmuting the card */ | |
104 | dev->muted = 0; | |
105 | outb (0xd8, io); /* enable card */ | |
4286c6f6 | 106 | } |
3593cab5 | 107 | mutex_unlock(&lock); |
1da177e4 LT |
108 | return 0; |
109 | } | |
110 | ||
111 | if(vol == 0) { /* volume = 0 means mute the card */ | |
112 | outb(0x48, io); /* volume down but still "on" */ | |
113 | sleep_delay(2000000); /* make sure it's totally down */ | |
114 | outb(0xd0, io); /* volume steady, off */ | |
115 | dev->curvol = 0; /* track the volume state! */ | |
3593cab5 | 116 | mutex_unlock(&lock); |
1da177e4 LT |
117 | return 0; |
118 | } | |
119 | ||
120 | dev->muted = 0; | |
121 | if(vol > dev->curvol) | |
4286c6f6 | 122 | for(i = dev->curvol; i < vol; i++) |
1da177e4 LT |
123 | rt_incvol(); |
124 | else | |
4286c6f6 | 125 | for(i = dev->curvol; i > vol; i--) |
1da177e4 LT |
126 | rt_decvol(); |
127 | ||
128 | dev->curvol = vol; | |
3593cab5 | 129 | mutex_unlock(&lock); |
1da177e4 LT |
130 | return 0; |
131 | } | |
132 | ||
4286c6f6 | 133 | /* the 128+64 on these outb's is to keep the volume stable while tuning |
1da177e4 LT |
134 | * without them, the volume _will_ creep up with each frequency change |
135 | * and bit 4 (+16) is to keep the signal strength meter enabled | |
136 | */ | |
137 | ||
138 | static void send_0_byte(int port, struct rt_device *dev) | |
139 | { | |
140 | if ((dev->curvol == 0) || (dev->muted)) { | |
141 | outb_p(128+64+16+ 1, port); /* wr-enable + data low */ | |
142 | outb_p(128+64+16+2+1, port); /* clock */ | |
143 | } | |
144 | else { | |
145 | outb_p(128+64+16+8+ 1, port); /* on + wr-enable + data low */ | |
146 | outb_p(128+64+16+8+2+1, port); /* clock */ | |
147 | } | |
4286c6f6 | 148 | sleep_delay(1000); |
1da177e4 LT |
149 | } |
150 | ||
151 | static void send_1_byte(int port, struct rt_device *dev) | |
152 | { | |
153 | if ((dev->curvol == 0) || (dev->muted)) { | |
154 | outb_p(128+64+16+4 +1, port); /* wr-enable+data high */ | |
155 | outb_p(128+64+16+4+2+1, port); /* clock */ | |
4286c6f6 | 156 | } |
1da177e4 LT |
157 | else { |
158 | outb_p(128+64+16+8+4 +1, port); /* on+wr-enable+data high */ | |
159 | outb_p(128+64+16+8+4+2+1, port); /* clock */ | |
160 | } | |
161 | ||
4286c6f6 | 162 | sleep_delay(1000); |
1da177e4 LT |
163 | } |
164 | ||
165 | static int rt_setfreq(struct rt_device *dev, unsigned long freq) | |
166 | { | |
167 | int i; | |
168 | ||
169 | /* adapted from radio-aztech.c */ | |
170 | ||
171 | /* now uses VIDEO_TUNER_LOW for fine tuning */ | |
172 | ||
173 | freq += 171200; /* Add 10.7 MHz IF */ | |
174 | freq /= 800; /* Convert to 50 kHz units */ | |
4286c6f6 | 175 | |
3593cab5 | 176 | mutex_lock(&lock); /* Stop other ops interfering */ |
4286c6f6 | 177 | |
1da177e4 LT |
178 | send_0_byte (io, dev); /* 0: LSB of frequency */ |
179 | ||
180 | for (i = 0; i < 13; i++) /* : frequency bits (1-13) */ | |
181 | if (freq & (1 << i)) | |
182 | send_1_byte (io, dev); | |
183 | else | |
184 | send_0_byte (io, dev); | |
185 | ||
186 | send_0_byte (io, dev); /* 14: test bit - always 0 */ | |
187 | send_0_byte (io, dev); /* 15: test bit - always 0 */ | |
188 | ||
189 | send_0_byte (io, dev); /* 16: band data 0 - always 0 */ | |
190 | send_0_byte (io, dev); /* 17: band data 1 - always 0 */ | |
191 | send_0_byte (io, dev); /* 18: band data 2 - always 0 */ | |
192 | send_0_byte (io, dev); /* 19: time base - always 0 */ | |
193 | ||
194 | send_0_byte (io, dev); /* 20: spacing (0 = 25 kHz) */ | |
195 | send_1_byte (io, dev); /* 21: spacing (1 = 25 kHz) */ | |
196 | send_0_byte (io, dev); /* 22: spacing (0 = 25 kHz) */ | |
197 | send_1_byte (io, dev); /* 23: AM/FM (FM = 1, always) */ | |
198 | ||
199 | if ((dev->curvol == 0) || (dev->muted)) | |
200 | outb (0xd0, io); /* volume steady + sigstr */ | |
201 | else | |
202 | outb (0xd8, io); /* volume steady + sigstr + on */ | |
4286c6f6 | 203 | |
3593cab5 | 204 | mutex_unlock(&lock); |
1da177e4 LT |
205 | |
206 | return 0; | |
207 | } | |
208 | ||
209 | static int rt_getsigstr(struct rt_device *dev) | |
210 | { | |
211 | if (inb(io) & 2) /* bit set = no signal present */ | |
212 | return 0; | |
213 | return 1; /* signal present */ | |
214 | } | |
215 | ||
46ff2c72 MCC |
216 | static struct v4l2_queryctrl radio_qctrl[] = { |
217 | { | |
218 | .id = V4L2_CID_AUDIO_MUTE, | |
219 | .name = "Mute", | |
220 | .minimum = 0, | |
221 | .maximum = 1, | |
222 | .default_value = 1, | |
223 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
224 | },{ | |
225 | .id = V4L2_CID_AUDIO_VOLUME, | |
226 | .name = "Volume", | |
227 | .minimum = 0, | |
228 | .maximum = 0xff, | |
229 | .step = 1, | |
230 | .default_value = 0xff, | |
231 | .type = V4L2_CTRL_TYPE_INTEGER, | |
232 | } | |
233 | }; | |
234 | ||
385e8d8f DL |
235 | static int vidioc_querycap(struct file *file, void *priv, |
236 | struct v4l2_capability *v) | |
237 | { | |
238 | strlcpy(v->driver, "radio-aimslab", sizeof(v->driver)); | |
239 | strlcpy(v->card, "RadioTrack", sizeof(v->card)); | |
240 | sprintf(v->bus_info, "ISA"); | |
241 | v->version = RADIO_VERSION; | |
242 | v->capabilities = V4L2_CAP_TUNER; | |
243 | return 0; | |
244 | } | |
245 | ||
246 | static int vidioc_g_tuner(struct file *file, void *priv, | |
247 | struct v4l2_tuner *v) | |
1da177e4 | 248 | { |
c170ecf4 | 249 | struct rt_device *rt = video_drvdata(file); |
4286c6f6 | 250 | |
385e8d8f DL |
251 | if (v->index > 0) |
252 | return -EINVAL; | |
46ff2c72 | 253 | |
385e8d8f DL |
254 | strcpy(v->name, "FM"); |
255 | v->type = V4L2_TUNER_RADIO; | |
256 | v->rangelow = (87*16000); | |
257 | v->rangehigh = (108*16000); | |
258 | v->rxsubchans = V4L2_TUNER_SUB_MONO; | |
259 | v->capability = V4L2_TUNER_CAP_LOW; | |
260 | v->audmode = V4L2_TUNER_MODE_MONO; | |
261 | v->signal = 0xffff*rt_getsigstr(rt); | |
262 | return 0; | |
263 | } | |
264 | ||
265 | static int vidioc_s_tuner(struct file *file, void *priv, | |
266 | struct v4l2_tuner *v) | |
267 | { | |
268 | if (v->index > 0) | |
269 | return -EINVAL; | |
270 | return 0; | |
271 | } | |
46ff2c72 | 272 | |
385e8d8f DL |
273 | static int vidioc_s_frequency(struct file *file, void *priv, |
274 | struct v4l2_frequency *f) | |
275 | { | |
c170ecf4 | 276 | struct rt_device *rt = video_drvdata(file); |
46ff2c72 | 277 | |
385e8d8f DL |
278 | rt->curfreq = f->frequency; |
279 | rt_setfreq(rt, rt->curfreq); | |
280 | return 0; | |
281 | } | |
46ff2c72 | 282 | |
385e8d8f DL |
283 | static int vidioc_g_frequency(struct file *file, void *priv, |
284 | struct v4l2_frequency *f) | |
285 | { | |
c170ecf4 | 286 | struct rt_device *rt = video_drvdata(file); |
46ff2c72 | 287 | |
385e8d8f DL |
288 | f->type = V4L2_TUNER_RADIO; |
289 | f->frequency = rt->curfreq; | |
290 | return 0; | |
291 | } | |
46ff2c72 | 292 | |
385e8d8f DL |
293 | static int vidioc_queryctrl(struct file *file, void *priv, |
294 | struct v4l2_queryctrl *qc) | |
295 | { | |
296 | int i; | |
46ff2c72 | 297 | |
385e8d8f DL |
298 | for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { |
299 | if (qc->id && qc->id == radio_qctrl[i].id) { | |
300 | memcpy(qc, &(radio_qctrl[i]), | |
301 | sizeof(*qc)); | |
1da177e4 LT |
302 | return 0; |
303 | } | |
385e8d8f DL |
304 | } |
305 | return -EINVAL; | |
306 | } | |
46ff2c72 | 307 | |
385e8d8f DL |
308 | static int vidioc_g_ctrl(struct file *file, void *priv, |
309 | struct v4l2_control *ctrl) | |
310 | { | |
c170ecf4 | 311 | struct rt_device *rt = video_drvdata(file); |
46ff2c72 | 312 | |
385e8d8f DL |
313 | switch (ctrl->id) { |
314 | case V4L2_CID_AUDIO_MUTE: | |
315 | ctrl->value = rt->muted; | |
316 | return 0; | |
317 | case V4L2_CID_AUDIO_VOLUME: | |
318 | ctrl->value = rt->curvol * 6554; | |
319 | return 0; | |
320 | } | |
321 | return -EINVAL; | |
322 | } | |
46ff2c72 | 323 | |
385e8d8f DL |
324 | static int vidioc_s_ctrl(struct file *file, void *priv, |
325 | struct v4l2_control *ctrl) | |
326 | { | |
c170ecf4 | 327 | struct rt_device *rt = video_drvdata(file); |
46ff2c72 | 328 | |
385e8d8f DL |
329 | switch (ctrl->id) { |
330 | case V4L2_CID_AUDIO_MUTE: | |
331 | if (ctrl->value) | |
332 | rt_mute(rt); | |
333 | else | |
334 | rt_setvol(rt,rt->curvol); | |
335 | return 0; | |
336 | case V4L2_CID_AUDIO_VOLUME: | |
337 | rt_setvol(rt,ctrl->value); | |
338 | return 0; | |
1da177e4 | 339 | } |
385e8d8f DL |
340 | return -EINVAL; |
341 | } | |
342 | ||
343 | static int vidioc_g_audio (struct file *file, void *priv, | |
344 | struct v4l2_audio *a) | |
345 | { | |
346 | if (a->index > 1) | |
347 | return -EINVAL; | |
348 | ||
349 | strcpy(a->name, "Radio"); | |
350 | a->capability = V4L2_AUDCAP_STEREO; | |
351 | return 0; | |
352 | } | |
353 | ||
354 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
355 | { | |
356 | *i = 0; | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
361 | { | |
362 | if (i != 0) | |
363 | return -EINVAL; | |
364 | return 0; | |
1da177e4 LT |
365 | } |
366 | ||
385e8d8f DL |
367 | static int vidioc_s_audio(struct file *file, void *priv, |
368 | struct v4l2_audio *a) | |
1da177e4 | 369 | { |
385e8d8f DL |
370 | if (a->index != 0) |
371 | return -EINVAL; | |
372 | return 0; | |
1da177e4 LT |
373 | } |
374 | ||
375 | static struct rt_device rtrack_unit; | |
376 | ||
bec43661 | 377 | static int rtrack_exclusive_open(struct file *file) |
3ca685aa HV |
378 | { |
379 | return test_and_set_bit(0, &rtrack_unit.in_use) ? -EBUSY : 0; | |
380 | } | |
381 | ||
bec43661 | 382 | static int rtrack_exclusive_release(struct file *file) |
3ca685aa HV |
383 | { |
384 | clear_bit(0, &rtrack_unit.in_use); | |
385 | return 0; | |
386 | } | |
387 | ||
bec43661 | 388 | static const struct v4l2_file_operations rtrack_fops = { |
1da177e4 | 389 | .owner = THIS_MODULE, |
3ca685aa HV |
390 | .open = rtrack_exclusive_open, |
391 | .release = rtrack_exclusive_release, | |
385e8d8f | 392 | .ioctl = video_ioctl2, |
1da177e4 LT |
393 | }; |
394 | ||
a399810c | 395 | static const struct v4l2_ioctl_ops rtrack_ioctl_ops = { |
385e8d8f DL |
396 | .vidioc_querycap = vidioc_querycap, |
397 | .vidioc_g_tuner = vidioc_g_tuner, | |
398 | .vidioc_s_tuner = vidioc_s_tuner, | |
399 | .vidioc_g_audio = vidioc_g_audio, | |
400 | .vidioc_s_audio = vidioc_s_audio, | |
401 | .vidioc_g_input = vidioc_g_input, | |
402 | .vidioc_s_input = vidioc_s_input, | |
403 | .vidioc_g_frequency = vidioc_g_frequency, | |
404 | .vidioc_s_frequency = vidioc_s_frequency, | |
405 | .vidioc_queryctrl = vidioc_queryctrl, | |
406 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
407 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1da177e4 LT |
408 | }; |
409 | ||
a399810c | 410 | static struct video_device rtrack_radio = { |
a399810c | 411 | .name = "RadioTrack radio", |
a399810c HV |
412 | .fops = &rtrack_fops, |
413 | .ioctl_ops = &rtrack_ioctl_ops, | |
aa5e90af | 414 | .release = video_device_release_empty, |
a399810c HV |
415 | }; |
416 | ||
1da177e4 LT |
417 | static int __init rtrack_init(void) |
418 | { | |
419 | if(io==-1) | |
420 | { | |
421 | printk(KERN_ERR "You must set an I/O address with io=0x???\n"); | |
422 | return -EINVAL; | |
423 | } | |
424 | ||
4286c6f6 | 425 | if (!request_region(io, 2, "rtrack")) |
1da177e4 LT |
426 | { |
427 | printk(KERN_ERR "rtrack: port 0x%x already in use\n", io); | |
428 | return -EBUSY; | |
429 | } | |
430 | ||
601e9444 | 431 | video_set_drvdata(&rtrack_radio, &rtrack_unit); |
4286c6f6 | 432 | |
cba99ae8 | 433 | if (video_register_device(&rtrack_radio, VFL_TYPE_RADIO, radio_nr) < 0) { |
1da177e4 LT |
434 | release_region(io, 2); |
435 | return -EINVAL; | |
436 | } | |
437 | printk(KERN_INFO "AIMSlab RadioTrack/RadioReveal card driver.\n"); | |
438 | ||
439 | /* Set up the I/O locking */ | |
4286c6f6 | 440 | |
3593cab5 | 441 | mutex_init(&lock); |
4286c6f6 MCC |
442 | |
443 | /* mute card - prevents noisy bootups */ | |
1da177e4 LT |
444 | |
445 | /* this ensures that the volume is all the way down */ | |
446 | outb(0x48, io); /* volume down but still "on" */ | |
447 | sleep_delay(2000000); /* make sure it's totally down */ | |
448 | outb(0xc0, io); /* steady volume, mute card */ | |
449 | rtrack_unit.curvol = 0; | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
454 | MODULE_AUTHOR("M.Kirkwood"); | |
455 | MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card."); | |
456 | MODULE_LICENSE("GPL"); | |
457 | ||
458 | module_param(io, int, 0); | |
459 | MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20f or 0x30f)"); | |
460 | module_param(radio_nr, int, 0); | |
461 | ||
462 | static void __exit cleanup_rtrack_module(void) | |
463 | { | |
464 | video_unregister_device(&rtrack_radio); | |
465 | release_region(io,2); | |
466 | } | |
467 | ||
468 | module_init(rtrack_init); | |
469 | module_exit(cleanup_rtrack_module); | |
470 |