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 */ | |
151c3f82 | 38 | #include <media/v4l2-device.h> |
35ea11ff | 39 | #include <media/v4l2-ioctl.h> |
1da177e4 | 40 | |
151c3f82 HV |
41 | MODULE_AUTHOR("M.Kirkwood"); |
42 | MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card."); | |
43 | MODULE_LICENSE("GPL"); | |
46ff2c72 | 44 | |
1da177e4 LT |
45 | #ifndef CONFIG_RADIO_RTRACK_PORT |
46 | #define CONFIG_RADIO_RTRACK_PORT -1 | |
47 | #endif | |
48 | ||
4286c6f6 | 49 | static int io = CONFIG_RADIO_RTRACK_PORT; |
1da177e4 | 50 | static int radio_nr = -1; |
1da177e4 | 51 | |
151c3f82 HV |
52 | module_param(io, int, 0); |
53 | MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20f or 0x30f)"); | |
54 | module_param(radio_nr, int, 0); | |
55 | ||
56 | #define RADIO_VERSION KERNEL_VERSION(0, 0, 2) | |
57 | ||
58 | struct rtrack | |
1da177e4 | 59 | { |
151c3f82 HV |
60 | struct v4l2_device v4l2_dev; |
61 | struct video_device vdev; | |
1da177e4 LT |
62 | int port; |
63 | int curvol; | |
64 | unsigned long curfreq; | |
65 | int muted; | |
151c3f82 HV |
66 | int io; |
67 | struct mutex lock; | |
1da177e4 LT |
68 | }; |
69 | ||
151c3f82 | 70 | static struct rtrack rtrack_card; |
1da177e4 LT |
71 | |
72 | /* local things */ | |
73 | ||
74 | static void sleep_delay(long n) | |
75 | { | |
76 | /* Sleep nicely for 'n' uS */ | |
151c3f82 HV |
77 | int d = n / msecs_to_jiffies(1000); |
78 | if (!d) | |
1da177e4 LT |
79 | udelay(n); |
80 | else | |
81 | msleep(jiffies_to_msecs(d)); | |
82 | } | |
83 | ||
151c3f82 | 84 | static void rt_decvol(struct rtrack *rt) |
1da177e4 | 85 | { |
151c3f82 | 86 | outb(0x58, rt->io); /* volume down + sigstr + on */ |
1da177e4 | 87 | sleep_delay(100000); |
151c3f82 | 88 | outb(0xd8, rt->io); /* volume steady + sigstr + on */ |
1da177e4 LT |
89 | } |
90 | ||
151c3f82 | 91 | static void rt_incvol(struct rtrack *rt) |
1da177e4 | 92 | { |
151c3f82 | 93 | outb(0x98, rt->io); /* volume up + sigstr + on */ |
1da177e4 | 94 | sleep_delay(100000); |
151c3f82 | 95 | outb(0xd8, rt->io); /* volume steady + sigstr + on */ |
1da177e4 LT |
96 | } |
97 | ||
151c3f82 | 98 | static void rt_mute(struct rtrack *rt) |
1da177e4 | 99 | { |
151c3f82 HV |
100 | rt->muted = 1; |
101 | mutex_lock(&rt->lock); | |
102 | outb(0xd0, rt->io); /* volume steady, off */ | |
103 | mutex_unlock(&rt->lock); | |
1da177e4 LT |
104 | } |
105 | ||
151c3f82 | 106 | static int rt_setvol(struct rtrack *rt, int vol) |
1da177e4 LT |
107 | { |
108 | int i; | |
109 | ||
151c3f82 | 110 | mutex_lock(&rt->lock); |
4286c6f6 | 111 | |
151c3f82 HV |
112 | if (vol == rt->curvol) { /* requested volume = current */ |
113 | if (rt->muted) { /* user is unmuting the card */ | |
114 | rt->muted = 0; | |
115 | outb(0xd8, rt->io); /* enable card */ | |
4286c6f6 | 116 | } |
151c3f82 | 117 | mutex_unlock(&rt->lock); |
1da177e4 LT |
118 | return 0; |
119 | } | |
120 | ||
151c3f82 HV |
121 | if (vol == 0) { /* volume = 0 means mute the card */ |
122 | outb(0x48, rt->io); /* volume down but still "on" */ | |
1da177e4 | 123 | sleep_delay(2000000); /* make sure it's totally down */ |
151c3f82 HV |
124 | outb(0xd0, rt->io); /* volume steady, off */ |
125 | rt->curvol = 0; /* track the volume state! */ | |
126 | mutex_unlock(&rt->lock); | |
1da177e4 LT |
127 | return 0; |
128 | } | |
129 | ||
151c3f82 HV |
130 | rt->muted = 0; |
131 | if (vol > rt->curvol) | |
132 | for (i = rt->curvol; i < vol; i++) | |
133 | rt_incvol(rt); | |
1da177e4 | 134 | else |
151c3f82 HV |
135 | for (i = rt->curvol; i > vol; i--) |
136 | rt_decvol(rt); | |
1da177e4 | 137 | |
151c3f82 HV |
138 | rt->curvol = vol; |
139 | mutex_unlock(&rt->lock); | |
1da177e4 LT |
140 | return 0; |
141 | } | |
142 | ||
4286c6f6 | 143 | /* the 128+64 on these outb's is to keep the volume stable while tuning |
1da177e4 LT |
144 | * without them, the volume _will_ creep up with each frequency change |
145 | * and bit 4 (+16) is to keep the signal strength meter enabled | |
146 | */ | |
147 | ||
151c3f82 | 148 | static void send_0_byte(struct rtrack *rt) |
1da177e4 | 149 | { |
151c3f82 HV |
150 | if (rt->curvol == 0 || rt->muted) { |
151 | outb_p(128+64+16+ 1, rt->io); /* wr-enable + data low */ | |
152 | outb_p(128+64+16+2+1, rt->io); /* clock */ | |
1da177e4 LT |
153 | } |
154 | else { | |
151c3f82 HV |
155 | outb_p(128+64+16+8+ 1, rt->io); /* on + wr-enable + data low */ |
156 | outb_p(128+64+16+8+2+1, rt->io); /* clock */ | |
1da177e4 | 157 | } |
4286c6f6 | 158 | sleep_delay(1000); |
1da177e4 LT |
159 | } |
160 | ||
151c3f82 | 161 | static void send_1_byte(struct rtrack *rt) |
1da177e4 | 162 | { |
151c3f82 HV |
163 | if (rt->curvol == 0 || rt->muted) { |
164 | outb_p(128+64+16+4 +1, rt->io); /* wr-enable+data high */ | |
165 | outb_p(128+64+16+4+2+1, rt->io); /* clock */ | |
4286c6f6 | 166 | } |
1da177e4 | 167 | else { |
151c3f82 HV |
168 | outb_p(128+64+16+8+4 +1, rt->io); /* on+wr-enable+data high */ |
169 | outb_p(128+64+16+8+4+2+1, rt->io); /* clock */ | |
1da177e4 LT |
170 | } |
171 | ||
4286c6f6 | 172 | sleep_delay(1000); |
1da177e4 LT |
173 | } |
174 | ||
151c3f82 | 175 | static int rt_setfreq(struct rtrack *rt, unsigned long freq) |
1da177e4 LT |
176 | { |
177 | int i; | |
178 | ||
151c3f82 HV |
179 | mutex_lock(&rt->lock); /* Stop other ops interfering */ |
180 | ||
181 | rt->curfreq = freq; | |
1da177e4 LT |
182 | |
183 | /* now uses VIDEO_TUNER_LOW for fine tuning */ | |
184 | ||
185 | freq += 171200; /* Add 10.7 MHz IF */ | |
186 | freq /= 800; /* Convert to 50 kHz units */ | |
4286c6f6 | 187 | |
151c3f82 | 188 | send_0_byte(rt); /* 0: LSB of frequency */ |
1da177e4 LT |
189 | |
190 | for (i = 0; i < 13; i++) /* : frequency bits (1-13) */ | |
191 | if (freq & (1 << i)) | |
151c3f82 | 192 | send_1_byte(rt); |
1da177e4 | 193 | else |
151c3f82 | 194 | send_0_byte(rt); |
1da177e4 | 195 | |
151c3f82 HV |
196 | send_0_byte(rt); /* 14: test bit - always 0 */ |
197 | send_0_byte(rt); /* 15: test bit - always 0 */ | |
1da177e4 | 198 | |
151c3f82 HV |
199 | send_0_byte(rt); /* 16: band data 0 - always 0 */ |
200 | send_0_byte(rt); /* 17: band data 1 - always 0 */ | |
201 | send_0_byte(rt); /* 18: band data 2 - always 0 */ | |
202 | send_0_byte(rt); /* 19: time base - always 0 */ | |
1da177e4 | 203 | |
151c3f82 HV |
204 | send_0_byte(rt); /* 20: spacing (0 = 25 kHz) */ |
205 | send_1_byte(rt); /* 21: spacing (1 = 25 kHz) */ | |
206 | send_0_byte(rt); /* 22: spacing (0 = 25 kHz) */ | |
207 | send_1_byte(rt); /* 23: AM/FM (FM = 1, always) */ | |
1da177e4 | 208 | |
151c3f82 HV |
209 | if (rt->curvol == 0 || rt->muted) |
210 | outb(0xd0, rt->io); /* volume steady + sigstr */ | |
1da177e4 | 211 | else |
151c3f82 | 212 | outb(0xd8, rt->io); /* volume steady + sigstr + on */ |
4286c6f6 | 213 | |
151c3f82 | 214 | mutex_unlock(&rt->lock); |
1da177e4 LT |
215 | |
216 | return 0; | |
217 | } | |
218 | ||
151c3f82 | 219 | static int rt_getsigstr(struct rtrack *rt) |
1da177e4 | 220 | { |
151c3f82 | 221 | int sig = 1; |
1da177e4 | 222 | |
151c3f82 HV |
223 | mutex_lock(&rt->lock); |
224 | if (inb(rt->io) & 2) /* bit set = no signal present */ | |
225 | sig = 0; | |
226 | mutex_unlock(&rt->lock); | |
227 | return sig; | |
228 | } | |
46ff2c72 | 229 | |
385e8d8f DL |
230 | static int vidioc_querycap(struct file *file, void *priv, |
231 | struct v4l2_capability *v) | |
232 | { | |
233 | strlcpy(v->driver, "radio-aimslab", sizeof(v->driver)); | |
234 | strlcpy(v->card, "RadioTrack", sizeof(v->card)); | |
151c3f82 | 235 | strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); |
385e8d8f | 236 | v->version = RADIO_VERSION; |
151c3f82 | 237 | v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; |
385e8d8f DL |
238 | return 0; |
239 | } | |
240 | ||
241 | static int vidioc_g_tuner(struct file *file, void *priv, | |
242 | struct v4l2_tuner *v) | |
1da177e4 | 243 | { |
151c3f82 | 244 | struct rtrack *rt = video_drvdata(file); |
4286c6f6 | 245 | |
385e8d8f DL |
246 | if (v->index > 0) |
247 | return -EINVAL; | |
46ff2c72 | 248 | |
151c3f82 | 249 | strlcpy(v->name, "FM", sizeof(v->name)); |
385e8d8f | 250 | v->type = V4L2_TUNER_RADIO; |
151c3f82 HV |
251 | v->rangelow = 87 * 16000; |
252 | v->rangehigh = 108 * 16000; | |
385e8d8f DL |
253 | v->rxsubchans = V4L2_TUNER_SUB_MONO; |
254 | v->capability = V4L2_TUNER_CAP_LOW; | |
255 | v->audmode = V4L2_TUNER_MODE_MONO; | |
151c3f82 | 256 | v->signal = 0xffff * rt_getsigstr(rt); |
385e8d8f DL |
257 | return 0; |
258 | } | |
259 | ||
260 | static int vidioc_s_tuner(struct file *file, void *priv, | |
261 | struct v4l2_tuner *v) | |
262 | { | |
151c3f82 | 263 | return v->index ? -EINVAL : 0; |
385e8d8f | 264 | } |
46ff2c72 | 265 | |
385e8d8f DL |
266 | static int vidioc_s_frequency(struct file *file, void *priv, |
267 | struct v4l2_frequency *f) | |
268 | { | |
151c3f82 | 269 | struct rtrack *rt = video_drvdata(file); |
46ff2c72 | 270 | |
a3a9e287 HV |
271 | if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) |
272 | return -EINVAL; | |
151c3f82 | 273 | rt_setfreq(rt, f->frequency); |
385e8d8f DL |
274 | return 0; |
275 | } | |
46ff2c72 | 276 | |
385e8d8f DL |
277 | static int vidioc_g_frequency(struct file *file, void *priv, |
278 | struct v4l2_frequency *f) | |
279 | { | |
151c3f82 | 280 | struct rtrack *rt = video_drvdata(file); |
46ff2c72 | 281 | |
a3a9e287 HV |
282 | if (f->tuner != 0) |
283 | return -EINVAL; | |
385e8d8f DL |
284 | f->type = V4L2_TUNER_RADIO; |
285 | f->frequency = rt->curfreq; | |
286 | return 0; | |
287 | } | |
46ff2c72 | 288 | |
385e8d8f DL |
289 | static int vidioc_queryctrl(struct file *file, void *priv, |
290 | struct v4l2_queryctrl *qc) | |
291 | { | |
151c3f82 HV |
292 | switch (qc->id) { |
293 | case V4L2_CID_AUDIO_MUTE: | |
294 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); | |
295 | case V4L2_CID_AUDIO_VOLUME: | |
296 | return v4l2_ctrl_query_fill(qc, 0, 0xff, 1, 0xff); | |
385e8d8f DL |
297 | } |
298 | return -EINVAL; | |
299 | } | |
46ff2c72 | 300 | |
385e8d8f DL |
301 | static int vidioc_g_ctrl(struct file *file, void *priv, |
302 | struct v4l2_control *ctrl) | |
303 | { | |
151c3f82 | 304 | struct rtrack *rt = video_drvdata(file); |
46ff2c72 | 305 | |
385e8d8f DL |
306 | switch (ctrl->id) { |
307 | case V4L2_CID_AUDIO_MUTE: | |
308 | ctrl->value = rt->muted; | |
309 | return 0; | |
310 | case V4L2_CID_AUDIO_VOLUME: | |
151c3f82 | 311 | ctrl->value = rt->curvol; |
385e8d8f DL |
312 | return 0; |
313 | } | |
314 | return -EINVAL; | |
315 | } | |
46ff2c72 | 316 | |
385e8d8f DL |
317 | static int vidioc_s_ctrl(struct file *file, void *priv, |
318 | struct v4l2_control *ctrl) | |
319 | { | |
151c3f82 | 320 | struct rtrack *rt = video_drvdata(file); |
46ff2c72 | 321 | |
385e8d8f DL |
322 | switch (ctrl->id) { |
323 | case V4L2_CID_AUDIO_MUTE: | |
324 | if (ctrl->value) | |
325 | rt_mute(rt); | |
326 | else | |
151c3f82 | 327 | rt_setvol(rt, rt->curvol); |
385e8d8f DL |
328 | return 0; |
329 | case V4L2_CID_AUDIO_VOLUME: | |
151c3f82 | 330 | rt_setvol(rt, ctrl->value); |
385e8d8f | 331 | return 0; |
1da177e4 | 332 | } |
385e8d8f DL |
333 | return -EINVAL; |
334 | } | |
335 | ||
385e8d8f DL |
336 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) |
337 | { | |
338 | *i = 0; | |
339 | return 0; | |
340 | } | |
341 | ||
342 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
343 | { | |
151c3f82 | 344 | return i ? -EINVAL : 0; |
1da177e4 LT |
345 | } |
346 | ||
151c3f82 | 347 | static int vidioc_g_audio(struct file *file, void *priv, |
385e8d8f | 348 | struct v4l2_audio *a) |
1da177e4 | 349 | { |
151c3f82 HV |
350 | a->index = 0; |
351 | strlcpy(a->name, "Radio", sizeof(a->name)); | |
352 | a->capability = V4L2_AUDCAP_STEREO; | |
385e8d8f | 353 | return 0; |
1da177e4 LT |
354 | } |
355 | ||
151c3f82 HV |
356 | static int vidioc_s_audio(struct file *file, void *priv, |
357 | struct v4l2_audio *a) | |
358 | { | |
359 | return a->index ? -EINVAL : 0; | |
360 | } | |
1da177e4 | 361 | |
bec43661 | 362 | static const struct v4l2_file_operations rtrack_fops = { |
1da177e4 | 363 | .owner = THIS_MODULE, |
32958fdd | 364 | .unlocked_ioctl = video_ioctl2, |
1da177e4 LT |
365 | }; |
366 | ||
a399810c | 367 | static const struct v4l2_ioctl_ops rtrack_ioctl_ops = { |
385e8d8f DL |
368 | .vidioc_querycap = vidioc_querycap, |
369 | .vidioc_g_tuner = vidioc_g_tuner, | |
370 | .vidioc_s_tuner = vidioc_s_tuner, | |
371 | .vidioc_g_audio = vidioc_g_audio, | |
372 | .vidioc_s_audio = vidioc_s_audio, | |
373 | .vidioc_g_input = vidioc_g_input, | |
374 | .vidioc_s_input = vidioc_s_input, | |
375 | .vidioc_g_frequency = vidioc_g_frequency, | |
376 | .vidioc_s_frequency = vidioc_s_frequency, | |
377 | .vidioc_queryctrl = vidioc_queryctrl, | |
378 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
379 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1da177e4 LT |
380 | }; |
381 | ||
382 | static int __init rtrack_init(void) | |
383 | { | |
151c3f82 HV |
384 | struct rtrack *rt = &rtrack_card; |
385 | struct v4l2_device *v4l2_dev = &rt->v4l2_dev; | |
386 | int res; | |
387 | ||
388 | strlcpy(v4l2_dev->name, "rtrack", sizeof(v4l2_dev->name)); | |
389 | rt->io = io; | |
390 | ||
391 | if (rt->io == -1) { | |
b24c20cc | 392 | v4l2_err(v4l2_dev, "you must set an I/O address with io=0x20f or 0x30f\n"); |
1da177e4 LT |
393 | return -EINVAL; |
394 | } | |
395 | ||
151c3f82 HV |
396 | if (!request_region(rt->io, 2, "rtrack")) { |
397 | v4l2_err(v4l2_dev, "port 0x%x already in use\n", rt->io); | |
1da177e4 LT |
398 | return -EBUSY; |
399 | } | |
400 | ||
151c3f82 HV |
401 | res = v4l2_device_register(NULL, v4l2_dev); |
402 | if (res < 0) { | |
403 | release_region(rt->io, 2); | |
404 | v4l2_err(v4l2_dev, "could not register v4l2_device\n"); | |
405 | return res; | |
406 | } | |
4286c6f6 | 407 | |
151c3f82 HV |
408 | strlcpy(rt->vdev.name, v4l2_dev->name, sizeof(rt->vdev.name)); |
409 | rt->vdev.v4l2_dev = v4l2_dev; | |
410 | rt->vdev.fops = &rtrack_fops; | |
411 | rt->vdev.ioctl_ops = &rtrack_ioctl_ops; | |
412 | rt->vdev.release = video_device_release_empty; | |
413 | video_set_drvdata(&rt->vdev, rt); | |
414 | ||
1da177e4 | 415 | /* Set up the I/O locking */ |
4286c6f6 | 416 | |
151c3f82 | 417 | mutex_init(&rt->lock); |
4286c6f6 MCC |
418 | |
419 | /* mute card - prevents noisy bootups */ | |
1da177e4 LT |
420 | |
421 | /* this ensures that the volume is all the way down */ | |
151c3f82 | 422 | outb(0x48, rt->io); /* volume down but still "on" */ |
1da177e4 | 423 | sleep_delay(2000000); /* make sure it's totally down */ |
151c3f82 | 424 | outb(0xc0, rt->io); /* steady volume, mute card */ |
1da177e4 | 425 | |
32958fdd HV |
426 | if (video_register_device(&rt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { |
427 | v4l2_device_unregister(&rt->v4l2_dev); | |
428 | release_region(rt->io, 2); | |
429 | return -EINVAL; | |
430 | } | |
431 | v4l2_info(v4l2_dev, "AIMSlab RadioTrack/RadioReveal card driver.\n"); | |
432 | ||
1da177e4 LT |
433 | return 0; |
434 | } | |
435 | ||
151c3f82 | 436 | static void __exit rtrack_exit(void) |
1da177e4 | 437 | { |
151c3f82 HV |
438 | struct rtrack *rt = &rtrack_card; |
439 | ||
440 | video_unregister_device(&rt->vdev); | |
441 | v4l2_device_unregister(&rt->v4l2_dev); | |
442 | release_region(rt->io, 2); | |
1da177e4 LT |
443 | } |
444 | ||
445 | module_init(rtrack_init); | |
151c3f82 | 446 | module_exit(rtrack_exit); |
1da177e4 | 447 |