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 | 34 | #include <linux/delay.h> /* udelay */ |
46ff2c72 | 35 | #include <linux/videodev2.h> /* kernel radio structs */ |
151c3f82 HV |
36 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ |
37 | #include <linux/io.h> /* outb, outb_p */ | |
38 | #include <linux/uaccess.h> /* copy to/from user */ | |
39 | #include <media/v4l2-device.h> | |
35ea11ff | 40 | #include <media/v4l2-ioctl.h> |
1da177e4 | 41 | |
151c3f82 HV |
42 | MODULE_AUTHOR("M.Kirkwood"); |
43 | MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card."); | |
44 | MODULE_LICENSE("GPL"); | |
46ff2c72 | 45 | |
1da177e4 LT |
46 | #ifndef CONFIG_RADIO_RTRACK_PORT |
47 | #define CONFIG_RADIO_RTRACK_PORT -1 | |
48 | #endif | |
49 | ||
4286c6f6 | 50 | static int io = CONFIG_RADIO_RTRACK_PORT; |
1da177e4 | 51 | static int radio_nr = -1; |
1da177e4 | 52 | |
151c3f82 HV |
53 | module_param(io, int, 0); |
54 | MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20f or 0x30f)"); | |
55 | module_param(radio_nr, int, 0); | |
56 | ||
57 | #define RADIO_VERSION KERNEL_VERSION(0, 0, 2) | |
58 | ||
59 | struct rtrack | |
1da177e4 | 60 | { |
151c3f82 HV |
61 | struct v4l2_device v4l2_dev; |
62 | struct video_device vdev; | |
1da177e4 LT |
63 | int port; |
64 | int curvol; | |
65 | unsigned long curfreq; | |
66 | int muted; | |
151c3f82 HV |
67 | int io; |
68 | struct mutex lock; | |
1da177e4 LT |
69 | }; |
70 | ||
151c3f82 | 71 | static struct rtrack rtrack_card; |
1da177e4 LT |
72 | |
73 | /* local things */ | |
74 | ||
75 | static void sleep_delay(long n) | |
76 | { | |
77 | /* Sleep nicely for 'n' uS */ | |
151c3f82 HV |
78 | int d = n / msecs_to_jiffies(1000); |
79 | if (!d) | |
1da177e4 LT |
80 | udelay(n); |
81 | else | |
82 | msleep(jiffies_to_msecs(d)); | |
83 | } | |
84 | ||
151c3f82 | 85 | static void rt_decvol(struct rtrack *rt) |
1da177e4 | 86 | { |
151c3f82 | 87 | outb(0x58, rt->io); /* volume down + sigstr + on */ |
1da177e4 | 88 | sleep_delay(100000); |
151c3f82 | 89 | outb(0xd8, rt->io); /* volume steady + sigstr + on */ |
1da177e4 LT |
90 | } |
91 | ||
151c3f82 | 92 | static void rt_incvol(struct rtrack *rt) |
1da177e4 | 93 | { |
151c3f82 | 94 | outb(0x98, rt->io); /* volume up + sigstr + on */ |
1da177e4 | 95 | sleep_delay(100000); |
151c3f82 | 96 | outb(0xd8, rt->io); /* volume steady + sigstr + on */ |
1da177e4 LT |
97 | } |
98 | ||
151c3f82 | 99 | static void rt_mute(struct rtrack *rt) |
1da177e4 | 100 | { |
151c3f82 HV |
101 | rt->muted = 1; |
102 | mutex_lock(&rt->lock); | |
103 | outb(0xd0, rt->io); /* volume steady, off */ | |
104 | mutex_unlock(&rt->lock); | |
1da177e4 LT |
105 | } |
106 | ||
151c3f82 | 107 | static int rt_setvol(struct rtrack *rt, int vol) |
1da177e4 LT |
108 | { |
109 | int i; | |
110 | ||
151c3f82 | 111 | mutex_lock(&rt->lock); |
4286c6f6 | 112 | |
151c3f82 HV |
113 | if (vol == rt->curvol) { /* requested volume = current */ |
114 | if (rt->muted) { /* user is unmuting the card */ | |
115 | rt->muted = 0; | |
116 | outb(0xd8, rt->io); /* enable card */ | |
4286c6f6 | 117 | } |
151c3f82 | 118 | mutex_unlock(&rt->lock); |
1da177e4 LT |
119 | return 0; |
120 | } | |
121 | ||
151c3f82 HV |
122 | if (vol == 0) { /* volume = 0 means mute the card */ |
123 | outb(0x48, rt->io); /* volume down but still "on" */ | |
1da177e4 | 124 | sleep_delay(2000000); /* make sure it's totally down */ |
151c3f82 HV |
125 | outb(0xd0, rt->io); /* volume steady, off */ |
126 | rt->curvol = 0; /* track the volume state! */ | |
127 | mutex_unlock(&rt->lock); | |
1da177e4 LT |
128 | return 0; |
129 | } | |
130 | ||
151c3f82 HV |
131 | rt->muted = 0; |
132 | if (vol > rt->curvol) | |
133 | for (i = rt->curvol; i < vol; i++) | |
134 | rt_incvol(rt); | |
1da177e4 | 135 | else |
151c3f82 HV |
136 | for (i = rt->curvol; i > vol; i--) |
137 | rt_decvol(rt); | |
1da177e4 | 138 | |
151c3f82 HV |
139 | rt->curvol = vol; |
140 | mutex_unlock(&rt->lock); | |
1da177e4 LT |
141 | return 0; |
142 | } | |
143 | ||
4286c6f6 | 144 | /* the 128+64 on these outb's is to keep the volume stable while tuning |
1da177e4 LT |
145 | * without them, the volume _will_ creep up with each frequency change |
146 | * and bit 4 (+16) is to keep the signal strength meter enabled | |
147 | */ | |
148 | ||
151c3f82 | 149 | static void send_0_byte(struct rtrack *rt) |
1da177e4 | 150 | { |
151c3f82 HV |
151 | if (rt->curvol == 0 || rt->muted) { |
152 | outb_p(128+64+16+ 1, rt->io); /* wr-enable + data low */ | |
153 | outb_p(128+64+16+2+1, rt->io); /* clock */ | |
1da177e4 LT |
154 | } |
155 | else { | |
151c3f82 HV |
156 | outb_p(128+64+16+8+ 1, rt->io); /* on + wr-enable + data low */ |
157 | outb_p(128+64+16+8+2+1, rt->io); /* clock */ | |
1da177e4 | 158 | } |
4286c6f6 | 159 | sleep_delay(1000); |
1da177e4 LT |
160 | } |
161 | ||
151c3f82 | 162 | static void send_1_byte(struct rtrack *rt) |
1da177e4 | 163 | { |
151c3f82 HV |
164 | if (rt->curvol == 0 || rt->muted) { |
165 | outb_p(128+64+16+4 +1, rt->io); /* wr-enable+data high */ | |
166 | outb_p(128+64+16+4+2+1, rt->io); /* clock */ | |
4286c6f6 | 167 | } |
1da177e4 | 168 | else { |
151c3f82 HV |
169 | outb_p(128+64+16+8+4 +1, rt->io); /* on+wr-enable+data high */ |
170 | outb_p(128+64+16+8+4+2+1, rt->io); /* clock */ | |
1da177e4 LT |
171 | } |
172 | ||
4286c6f6 | 173 | sleep_delay(1000); |
1da177e4 LT |
174 | } |
175 | ||
151c3f82 | 176 | static int rt_setfreq(struct rtrack *rt, unsigned long freq) |
1da177e4 LT |
177 | { |
178 | int i; | |
179 | ||
151c3f82 HV |
180 | mutex_lock(&rt->lock); /* Stop other ops interfering */ |
181 | ||
182 | rt->curfreq = freq; | |
1da177e4 LT |
183 | |
184 | /* now uses VIDEO_TUNER_LOW for fine tuning */ | |
185 | ||
186 | freq += 171200; /* Add 10.7 MHz IF */ | |
187 | freq /= 800; /* Convert to 50 kHz units */ | |
4286c6f6 | 188 | |
151c3f82 | 189 | send_0_byte(rt); /* 0: LSB of frequency */ |
1da177e4 LT |
190 | |
191 | for (i = 0; i < 13; i++) /* : frequency bits (1-13) */ | |
192 | if (freq & (1 << i)) | |
151c3f82 | 193 | send_1_byte(rt); |
1da177e4 | 194 | else |
151c3f82 | 195 | send_0_byte(rt); |
1da177e4 | 196 | |
151c3f82 HV |
197 | send_0_byte(rt); /* 14: test bit - always 0 */ |
198 | send_0_byte(rt); /* 15: test bit - always 0 */ | |
1da177e4 | 199 | |
151c3f82 HV |
200 | send_0_byte(rt); /* 16: band data 0 - always 0 */ |
201 | send_0_byte(rt); /* 17: band data 1 - always 0 */ | |
202 | send_0_byte(rt); /* 18: band data 2 - always 0 */ | |
203 | send_0_byte(rt); /* 19: time base - always 0 */ | |
1da177e4 | 204 | |
151c3f82 HV |
205 | send_0_byte(rt); /* 20: spacing (0 = 25 kHz) */ |
206 | send_1_byte(rt); /* 21: spacing (1 = 25 kHz) */ | |
207 | send_0_byte(rt); /* 22: spacing (0 = 25 kHz) */ | |
208 | send_1_byte(rt); /* 23: AM/FM (FM = 1, always) */ | |
1da177e4 | 209 | |
151c3f82 HV |
210 | if (rt->curvol == 0 || rt->muted) |
211 | outb(0xd0, rt->io); /* volume steady + sigstr */ | |
1da177e4 | 212 | else |
151c3f82 | 213 | outb(0xd8, rt->io); /* volume steady + sigstr + on */ |
4286c6f6 | 214 | |
151c3f82 | 215 | mutex_unlock(&rt->lock); |
1da177e4 LT |
216 | |
217 | return 0; | |
218 | } | |
219 | ||
151c3f82 | 220 | static int rt_getsigstr(struct rtrack *rt) |
1da177e4 | 221 | { |
151c3f82 | 222 | int sig = 1; |
1da177e4 | 223 | |
151c3f82 HV |
224 | mutex_lock(&rt->lock); |
225 | if (inb(rt->io) & 2) /* bit set = no signal present */ | |
226 | sig = 0; | |
227 | mutex_unlock(&rt->lock); | |
228 | return sig; | |
229 | } | |
46ff2c72 | 230 | |
385e8d8f DL |
231 | static int vidioc_querycap(struct file *file, void *priv, |
232 | struct v4l2_capability *v) | |
233 | { | |
234 | strlcpy(v->driver, "radio-aimslab", sizeof(v->driver)); | |
235 | strlcpy(v->card, "RadioTrack", sizeof(v->card)); | |
151c3f82 | 236 | strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); |
385e8d8f | 237 | v->version = RADIO_VERSION; |
151c3f82 | 238 | v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; |
385e8d8f DL |
239 | return 0; |
240 | } | |
241 | ||
242 | static int vidioc_g_tuner(struct file *file, void *priv, | |
243 | struct v4l2_tuner *v) | |
1da177e4 | 244 | { |
151c3f82 | 245 | struct rtrack *rt = video_drvdata(file); |
4286c6f6 | 246 | |
385e8d8f DL |
247 | if (v->index > 0) |
248 | return -EINVAL; | |
46ff2c72 | 249 | |
151c3f82 | 250 | strlcpy(v->name, "FM", sizeof(v->name)); |
385e8d8f | 251 | v->type = V4L2_TUNER_RADIO; |
151c3f82 HV |
252 | v->rangelow = 87 * 16000; |
253 | v->rangehigh = 108 * 16000; | |
385e8d8f DL |
254 | v->rxsubchans = V4L2_TUNER_SUB_MONO; |
255 | v->capability = V4L2_TUNER_CAP_LOW; | |
256 | v->audmode = V4L2_TUNER_MODE_MONO; | |
151c3f82 | 257 | v->signal = 0xffff * rt_getsigstr(rt); |
385e8d8f DL |
258 | return 0; |
259 | } | |
260 | ||
261 | static int vidioc_s_tuner(struct file *file, void *priv, | |
262 | struct v4l2_tuner *v) | |
263 | { | |
151c3f82 | 264 | return v->index ? -EINVAL : 0; |
385e8d8f | 265 | } |
46ff2c72 | 266 | |
385e8d8f DL |
267 | static int vidioc_s_frequency(struct file *file, void *priv, |
268 | struct v4l2_frequency *f) | |
269 | { | |
151c3f82 | 270 | struct rtrack *rt = video_drvdata(file); |
46ff2c72 | 271 | |
151c3f82 | 272 | rt_setfreq(rt, f->frequency); |
385e8d8f DL |
273 | return 0; |
274 | } | |
46ff2c72 | 275 | |
385e8d8f DL |
276 | static int vidioc_g_frequency(struct file *file, void *priv, |
277 | struct v4l2_frequency *f) | |
278 | { | |
151c3f82 | 279 | struct rtrack *rt = video_drvdata(file); |
46ff2c72 | 280 | |
385e8d8f DL |
281 | f->type = V4L2_TUNER_RADIO; |
282 | f->frequency = rt->curfreq; | |
283 | return 0; | |
284 | } | |
46ff2c72 | 285 | |
385e8d8f DL |
286 | static int vidioc_queryctrl(struct file *file, void *priv, |
287 | struct v4l2_queryctrl *qc) | |
288 | { | |
151c3f82 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 | return v4l2_ctrl_query_fill(qc, 0, 0xff, 1, 0xff); | |
385e8d8f DL |
294 | } |
295 | return -EINVAL; | |
296 | } | |
46ff2c72 | 297 | |
385e8d8f DL |
298 | static int vidioc_g_ctrl(struct file *file, void *priv, |
299 | struct v4l2_control *ctrl) | |
300 | { | |
151c3f82 | 301 | struct rtrack *rt = video_drvdata(file); |
46ff2c72 | 302 | |
385e8d8f DL |
303 | switch (ctrl->id) { |
304 | case V4L2_CID_AUDIO_MUTE: | |
305 | ctrl->value = rt->muted; | |
306 | return 0; | |
307 | case V4L2_CID_AUDIO_VOLUME: | |
151c3f82 | 308 | ctrl->value = rt->curvol; |
385e8d8f DL |
309 | return 0; |
310 | } | |
311 | return -EINVAL; | |
312 | } | |
46ff2c72 | 313 | |
385e8d8f DL |
314 | static int vidioc_s_ctrl(struct file *file, void *priv, |
315 | struct v4l2_control *ctrl) | |
316 | { | |
151c3f82 | 317 | struct rtrack *rt = video_drvdata(file); |
46ff2c72 | 318 | |
385e8d8f DL |
319 | switch (ctrl->id) { |
320 | case V4L2_CID_AUDIO_MUTE: | |
321 | if (ctrl->value) | |
322 | rt_mute(rt); | |
323 | else | |
151c3f82 | 324 | rt_setvol(rt, rt->curvol); |
385e8d8f DL |
325 | return 0; |
326 | case V4L2_CID_AUDIO_VOLUME: | |
151c3f82 | 327 | rt_setvol(rt, ctrl->value); |
385e8d8f | 328 | return 0; |
1da177e4 | 329 | } |
385e8d8f DL |
330 | return -EINVAL; |
331 | } | |
332 | ||
385e8d8f DL |
333 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) |
334 | { | |
335 | *i = 0; | |
336 | return 0; | |
337 | } | |
338 | ||
339 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
340 | { | |
151c3f82 | 341 | return i ? -EINVAL : 0; |
1da177e4 LT |
342 | } |
343 | ||
151c3f82 | 344 | static int vidioc_g_audio(struct file *file, void *priv, |
385e8d8f | 345 | struct v4l2_audio *a) |
1da177e4 | 346 | { |
151c3f82 HV |
347 | a->index = 0; |
348 | strlcpy(a->name, "Radio", sizeof(a->name)); | |
349 | a->capability = V4L2_AUDCAP_STEREO; | |
385e8d8f | 350 | return 0; |
1da177e4 LT |
351 | } |
352 | ||
151c3f82 HV |
353 | static int vidioc_s_audio(struct file *file, void *priv, |
354 | struct v4l2_audio *a) | |
355 | { | |
356 | return a->index ? -EINVAL : 0; | |
357 | } | |
1da177e4 | 358 | |
151c3f82 | 359 | static int rtrack_open(struct file *file) |
3ca685aa | 360 | { |
151c3f82 | 361 | return 0; |
3ca685aa HV |
362 | } |
363 | ||
151c3f82 | 364 | static int rtrack_release(struct file *file) |
3ca685aa | 365 | { |
3ca685aa HV |
366 | return 0; |
367 | } | |
368 | ||
bec43661 | 369 | static const struct v4l2_file_operations rtrack_fops = { |
1da177e4 | 370 | .owner = THIS_MODULE, |
151c3f82 HV |
371 | .open = rtrack_open, |
372 | .release = rtrack_release, | |
385e8d8f | 373 | .ioctl = video_ioctl2, |
1da177e4 LT |
374 | }; |
375 | ||
a399810c | 376 | static const struct v4l2_ioctl_ops rtrack_ioctl_ops = { |
385e8d8f DL |
377 | .vidioc_querycap = vidioc_querycap, |
378 | .vidioc_g_tuner = vidioc_g_tuner, | |
379 | .vidioc_s_tuner = vidioc_s_tuner, | |
380 | .vidioc_g_audio = vidioc_g_audio, | |
381 | .vidioc_s_audio = vidioc_s_audio, | |
382 | .vidioc_g_input = vidioc_g_input, | |
383 | .vidioc_s_input = vidioc_s_input, | |
384 | .vidioc_g_frequency = vidioc_g_frequency, | |
385 | .vidioc_s_frequency = vidioc_s_frequency, | |
386 | .vidioc_queryctrl = vidioc_queryctrl, | |
387 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
388 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1da177e4 LT |
389 | }; |
390 | ||
391 | static int __init rtrack_init(void) | |
392 | { | |
151c3f82 HV |
393 | struct rtrack *rt = &rtrack_card; |
394 | struct v4l2_device *v4l2_dev = &rt->v4l2_dev; | |
395 | int res; | |
396 | ||
397 | strlcpy(v4l2_dev->name, "rtrack", sizeof(v4l2_dev->name)); | |
398 | rt->io = io; | |
399 | ||
400 | if (rt->io == -1) { | |
401 | v4l2_err(v4l2_dev, "you must set an I/O address with io=0x???\n"); | |
1da177e4 LT |
402 | return -EINVAL; |
403 | } | |
404 | ||
151c3f82 HV |
405 | if (!request_region(rt->io, 2, "rtrack")) { |
406 | v4l2_err(v4l2_dev, "port 0x%x already in use\n", rt->io); | |
1da177e4 LT |
407 | return -EBUSY; |
408 | } | |
409 | ||
151c3f82 HV |
410 | res = v4l2_device_register(NULL, v4l2_dev); |
411 | if (res < 0) { | |
412 | release_region(rt->io, 2); | |
413 | v4l2_err(v4l2_dev, "could not register v4l2_device\n"); | |
414 | return res; | |
415 | } | |
4286c6f6 | 416 | |
151c3f82 HV |
417 | strlcpy(rt->vdev.name, v4l2_dev->name, sizeof(rt->vdev.name)); |
418 | rt->vdev.v4l2_dev = v4l2_dev; | |
419 | rt->vdev.fops = &rtrack_fops; | |
420 | rt->vdev.ioctl_ops = &rtrack_ioctl_ops; | |
421 | rt->vdev.release = video_device_release_empty; | |
422 | video_set_drvdata(&rt->vdev, rt); | |
423 | ||
424 | if (video_register_device(&rt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { | |
425 | v4l2_device_unregister(&rt->v4l2_dev); | |
426 | release_region(rt->io, 2); | |
1da177e4 LT |
427 | return -EINVAL; |
428 | } | |
151c3f82 | 429 | v4l2_info(v4l2_dev, "AIMSlab RadioTrack/RadioReveal card driver.\n"); |
1da177e4 LT |
430 | |
431 | /* Set up the I/O locking */ | |
4286c6f6 | 432 | |
151c3f82 | 433 | mutex_init(&rt->lock); |
4286c6f6 MCC |
434 | |
435 | /* mute card - prevents noisy bootups */ | |
1da177e4 LT |
436 | |
437 | /* this ensures that the volume is all the way down */ | |
151c3f82 | 438 | outb(0x48, rt->io); /* volume down but still "on" */ |
1da177e4 | 439 | sleep_delay(2000000); /* make sure it's totally down */ |
151c3f82 | 440 | outb(0xc0, rt->io); /* steady volume, mute card */ |
1da177e4 LT |
441 | |
442 | return 0; | |
443 | } | |
444 | ||
151c3f82 | 445 | static void __exit rtrack_exit(void) |
1da177e4 | 446 | { |
151c3f82 HV |
447 | struct rtrack *rt = &rtrack_card; |
448 | ||
449 | video_unregister_device(&rt->vdev); | |
450 | v4l2_device_unregister(&rt->v4l2_dev); | |
451 | release_region(rt->io, 2); | |
1da177e4 LT |
452 | } |
453 | ||
454 | module_init(rtrack_init); | |
151c3f82 | 455 | module_exit(rtrack_exit); |
1da177e4 | 456 |