]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* Typhoon Radio Card driver for radio support |
2 | * (c) 1999 Dr. Henrik Seidel <Henrik.Seidel@gmx.de> | |
3 | * | |
4 | * Card manufacturer: | |
5 | * http://194.18.155.92/idc/prod2.idc?nr=50753&lang=e | |
6 | * | |
7 | * Notes on the hardware | |
8 | * | |
9 | * This card has two output sockets, one for speakers and one for line. | |
10 | * The speaker output has volume control, but only in four discrete | |
11 | * steps. The line output has neither volume control nor mute. | |
12 | * | |
13 | * The card has auto-stereo according to its manual, although it all | |
14 | * sounds mono to me (even with the Win/DOS drivers). Maybe it's my | |
15 | * antenna - I really don't know for sure. | |
16 | * | |
17 | * Frequency control is done digitally. | |
18 | * | |
19 | * Volume control is done digitally, but there are only four different | |
20 | * possible values. So you should better always turn the volume up and | |
21 | * use line control. I got the best results by connecting line output | |
22 | * to the sound card microphone input. For such a configuration the | |
23 | * volume control has no effect, since volume control only influences | |
24 | * the speaker output. | |
25 | * | |
26 | * There is no explicit mute/unmute. So I set the radio frequency to a | |
27 | * value where I do expect just noise and turn the speaker volume down. | |
28 | * The frequency change is necessary since the card never seems to be | |
29 | * completely silent. | |
30c48305 MCC |
30 | * |
31 | * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> | |
1da177e4 LT |
32 | */ |
33 | ||
34 | #include <linux/module.h> /* Modules */ | |
35 | #include <linux/init.h> /* Initdata */ | |
fb911ee8 | 36 | #include <linux/ioport.h> /* request_region */ |
1da177e4 LT |
37 | #include <linux/proc_fs.h> /* radio card status report */ |
38 | #include <asm/io.h> /* outb, outb_p */ | |
39 | #include <asm/uaccess.h> /* copy to/from user */ | |
30c48305 | 40 | #include <linux/videodev2.h> /* kernel radio structs */ |
5e87efa3 | 41 | #include <media/v4l2-common.h> |
1da177e4 | 42 | |
30c48305 MCC |
43 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ |
44 | #define RADIO_VERSION KERNEL_VERSION(0,1,1) | |
45 | #define BANNER "Typhoon Radio Card driver v0.1.1\n" | |
46 | ||
47 | static struct v4l2_queryctrl radio_qctrl[] = { | |
48 | { | |
49 | .id = V4L2_CID_AUDIO_MUTE, | |
50 | .name = "Mute", | |
51 | .minimum = 0, | |
52 | .maximum = 1, | |
53 | .default_value = 1, | |
54 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
55 | },{ | |
56 | .id = V4L2_CID_AUDIO_VOLUME, | |
57 | .name = "Volume", | |
58 | .minimum = 0, | |
59 | .maximum = 65535, | |
60 | .step = 1<<14, | |
61 | .default_value = 0xff, | |
62 | .type = V4L2_CTRL_TYPE_INTEGER, | |
63 | } | |
64 | }; | |
65 | ||
1da177e4 LT |
66 | |
67 | #ifndef CONFIG_RADIO_TYPHOON_PORT | |
68 | #define CONFIG_RADIO_TYPHOON_PORT -1 | |
69 | #endif | |
70 | ||
71 | #ifndef CONFIG_RADIO_TYPHOON_MUTEFREQ | |
72 | #define CONFIG_RADIO_TYPHOON_MUTEFREQ 0 | |
73 | #endif | |
74 | ||
75 | #ifndef CONFIG_PROC_FS | |
76 | #undef CONFIG_RADIO_TYPHOON_PROC_FS | |
77 | #endif | |
78 | ||
79 | struct typhoon_device { | |
80 | int users; | |
81 | int iobase; | |
82 | int curvol; | |
83 | int muted; | |
84 | unsigned long curfreq; | |
85 | unsigned long mutefreq; | |
3593cab5 | 86 | struct mutex lock; |
1da177e4 LT |
87 | }; |
88 | ||
89 | static void typhoon_setvol_generic(struct typhoon_device *dev, int vol); | |
90 | static int typhoon_setfreq_generic(struct typhoon_device *dev, | |
91 | unsigned long frequency); | |
92 | static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency); | |
93 | static void typhoon_mute(struct typhoon_device *dev); | |
94 | static void typhoon_unmute(struct typhoon_device *dev); | |
95 | static int typhoon_setvol(struct typhoon_device *dev, int vol); | |
1da177e4 LT |
96 | #ifdef CONFIG_RADIO_TYPHOON_PROC_FS |
97 | static int typhoon_get_info(char *buf, char **start, off_t offset, int len); | |
98 | #endif | |
99 | ||
100 | static void typhoon_setvol_generic(struct typhoon_device *dev, int vol) | |
101 | { | |
3593cab5 | 102 | mutex_lock(&dev->lock); |
1da177e4 LT |
103 | vol >>= 14; /* Map 16 bit to 2 bit */ |
104 | vol &= 3; | |
105 | outb_p(vol / 2, dev->iobase); /* Set the volume, high bit. */ | |
106 | outb_p(vol % 2, dev->iobase + 2); /* Set the volume, low bit. */ | |
3593cab5 | 107 | mutex_unlock(&dev->lock); |
1da177e4 LT |
108 | } |
109 | ||
110 | static int typhoon_setfreq_generic(struct typhoon_device *dev, | |
111 | unsigned long frequency) | |
112 | { | |
113 | unsigned long outval; | |
114 | unsigned long x; | |
115 | ||
116 | /* | |
117 | * The frequency transfer curve is not linear. The best fit I could | |
118 | * get is | |
119 | * | |
120 | * outval = -155 + exp((f + 15.55) * 0.057)) | |
121 | * | |
122 | * where frequency f is in MHz. Since we don't have exp in the kernel, | |
123 | * I approximate this function by a third order polynomial. | |
124 | * | |
125 | */ | |
126 | ||
3593cab5 | 127 | mutex_lock(&dev->lock); |
1da177e4 LT |
128 | x = frequency / 160; |
129 | outval = (x * x + 2500) / 5000; | |
130 | outval = (outval * x + 5000) / 10000; | |
131 | outval -= (10 * x * x + 10433) / 20866; | |
132 | outval += 4 * x - 11505; | |
133 | ||
134 | outb_p((outval >> 8) & 0x01, dev->iobase + 4); | |
135 | outb_p(outval >> 9, dev->iobase + 6); | |
136 | outb_p(outval & 0xff, dev->iobase + 8); | |
3593cab5 | 137 | mutex_unlock(&dev->lock); |
1da177e4 LT |
138 | |
139 | return 0; | |
140 | } | |
141 | ||
142 | static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency) | |
143 | { | |
144 | typhoon_setfreq_generic(dev, frequency); | |
145 | dev->curfreq = frequency; | |
146 | return 0; | |
147 | } | |
148 | ||
149 | static void typhoon_mute(struct typhoon_device *dev) | |
150 | { | |
151 | if (dev->muted == 1) | |
152 | return; | |
153 | typhoon_setvol_generic(dev, 0); | |
154 | typhoon_setfreq_generic(dev, dev->mutefreq); | |
155 | dev->muted = 1; | |
156 | } | |
157 | ||
158 | static void typhoon_unmute(struct typhoon_device *dev) | |
159 | { | |
160 | if (dev->muted == 0) | |
161 | return; | |
162 | typhoon_setfreq_generic(dev, dev->curfreq); | |
163 | typhoon_setvol_generic(dev, dev->curvol); | |
164 | dev->muted = 0; | |
165 | } | |
166 | ||
167 | static int typhoon_setvol(struct typhoon_device *dev, int vol) | |
168 | { | |
169 | if (dev->muted && vol != 0) { /* user is unmuting the card */ | |
170 | dev->curvol = vol; | |
171 | typhoon_unmute(dev); | |
172 | return 0; | |
173 | } | |
174 | if (vol == dev->curvol) /* requested volume == current */ | |
175 | return 0; | |
176 | ||
177 | if (vol == 0) { /* volume == 0 means mute the card */ | |
178 | typhoon_mute(dev); | |
179 | dev->curvol = vol; | |
180 | return 0; | |
181 | } | |
182 | typhoon_setvol_generic(dev, vol); | |
183 | dev->curvol = vol; | |
184 | return 0; | |
185 | } | |
186 | ||
3f6892ac DL |
187 | static int vidioc_querycap(struct file *file, void *priv, |
188 | struct v4l2_capability *v) | |
189 | { | |
190 | strlcpy(v->driver, "radio-typhoon", sizeof(v->driver)); | |
191 | strlcpy(v->card, "Typhoon Radio", sizeof(v->card)); | |
192 | sprintf(v->bus_info, "ISA"); | |
193 | v->version = RADIO_VERSION; | |
194 | v->capabilities = V4L2_CAP_TUNER; | |
195 | return 0; | |
196 | } | |
197 | ||
198 | static int vidioc_g_tuner(struct file *file, void *priv, | |
199 | struct v4l2_tuner *v) | |
200 | { | |
201 | if (v->index > 0) | |
202 | return -EINVAL; | |
203 | ||
204 | strcpy(v->name, "FM"); | |
205 | v->type = V4L2_TUNER_RADIO; | |
206 | v->rangelow = (87.5*16000); | |
207 | v->rangehigh = (108*16000); | |
208 | v->rxsubchans = V4L2_TUNER_SUB_MONO; | |
209 | v->capability = V4L2_TUNER_CAP_LOW; | |
210 | v->audmode = V4L2_TUNER_MODE_MONO; | |
211 | v->signal = 0xFFFF; /* We can't get the signal strength */ | |
212 | return 0; | |
213 | } | |
1da177e4 | 214 | |
3f6892ac DL |
215 | static int vidioc_s_tuner(struct file *file, void *priv, |
216 | struct v4l2_tuner *v) | |
217 | { | |
218 | if (v->index > 0) | |
219 | return -EINVAL; | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | static int vidioc_s_frequency(struct file *file, void *priv, | |
225 | struct v4l2_frequency *f) | |
1da177e4 LT |
226 | { |
227 | struct video_device *dev = video_devdata(file); | |
228 | struct typhoon_device *typhoon = dev->priv; | |
229 | ||
3f6892ac DL |
230 | typhoon->curfreq = f->frequency; |
231 | typhoon_setfreq(typhoon, typhoon->curfreq); | |
232 | return 0; | |
233 | } | |
30c48305 | 234 | |
3f6892ac DL |
235 | static int vidioc_g_frequency(struct file *file, void *priv, |
236 | struct v4l2_frequency *f) | |
237 | { | |
238 | struct video_device *dev = video_devdata(file); | |
239 | struct typhoon_device *typhoon = dev->priv; | |
30c48305 | 240 | |
3f6892ac DL |
241 | f->type = V4L2_TUNER_RADIO; |
242 | f->frequency = typhoon->curfreq; | |
30c48305 | 243 | |
3f6892ac DL |
244 | return 0; |
245 | } | |
30c48305 | 246 | |
3f6892ac DL |
247 | static int vidioc_queryctrl(struct file *file, void *priv, |
248 | struct v4l2_queryctrl *qc) | |
249 | { | |
250 | int i; | |
30c48305 | 251 | |
3f6892ac DL |
252 | for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { |
253 | if (qc->id && qc->id == radio_qctrl[i].id) { | |
254 | memcpy(qc, &(radio_qctrl[i]), | |
255 | sizeof(*qc)); | |
1da177e4 LT |
256 | return 0; |
257 | } | |
3f6892ac DL |
258 | } |
259 | return -EINVAL; | |
260 | } | |
30c48305 | 261 | |
3f6892ac DL |
262 | static int vidioc_g_ctrl(struct file *file, void *priv, |
263 | struct v4l2_control *ctrl) | |
264 | { | |
265 | struct video_device *dev = video_devdata(file); | |
266 | struct typhoon_device *typhoon = dev->priv; | |
30c48305 | 267 | |
3f6892ac DL |
268 | switch (ctrl->id) { |
269 | case V4L2_CID_AUDIO_MUTE: | |
270 | ctrl->value = typhoon->muted; | |
271 | return 0; | |
272 | case V4L2_CID_AUDIO_VOLUME: | |
273 | ctrl->value = typhoon->curvol; | |
274 | return 0; | |
275 | } | |
276 | return -EINVAL; | |
277 | } | |
30c48305 | 278 | |
3f6892ac DL |
279 | static int vidioc_s_ctrl (struct file *file, void *priv, |
280 | struct v4l2_control *ctrl) | |
281 | { | |
282 | struct video_device *dev = video_devdata(file); | |
283 | struct typhoon_device *typhoon = dev->priv; | |
30c48305 | 284 | |
3f6892ac DL |
285 | switch (ctrl->id) { |
286 | case V4L2_CID_AUDIO_MUTE: | |
287 | if (ctrl->value) | |
288 | typhoon_mute(typhoon); | |
289 | else | |
290 | typhoon_unmute(typhoon); | |
291 | return 0; | |
292 | case V4L2_CID_AUDIO_VOLUME: | |
293 | typhoon_setvol(typhoon, ctrl->value); | |
294 | return 0; | |
295 | } | |
296 | return -EINVAL; | |
297 | } | |
30c48305 | 298 | |
3f6892ac DL |
299 | static int vidioc_g_audio(struct file *file, void *priv, |
300 | struct v4l2_audio *a) | |
301 | { | |
302 | if (a->index > 1) | |
303 | return -EINVAL; | |
30c48305 | 304 | |
3f6892ac DL |
305 | strcpy(a->name, "Radio"); |
306 | a->capability = V4L2_AUDCAP_STEREO; | |
307 | return 0; | |
308 | } | |
309 | ||
310 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
311 | { | |
312 | *i = 0; | |
313 | return 0; | |
1da177e4 LT |
314 | } |
315 | ||
3f6892ac | 316 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) |
1da177e4 | 317 | { |
3f6892ac DL |
318 | if (i != 0) |
319 | return -EINVAL; | |
320 | return 0; | |
321 | } | |
322 | ||
323 | static int vidioc_s_audio(struct file *file, void *priv, | |
324 | struct v4l2_audio *a) | |
325 | { | |
326 | if (a->index != 0) | |
327 | return -EINVAL; | |
328 | return 0; | |
1da177e4 LT |
329 | } |
330 | ||
331 | static struct typhoon_device typhoon_unit = | |
332 | { | |
333 | .iobase = CONFIG_RADIO_TYPHOON_PORT, | |
334 | .curfreq = CONFIG_RADIO_TYPHOON_MUTEFREQ, | |
335 | .mutefreq = CONFIG_RADIO_TYPHOON_MUTEFREQ, | |
336 | }; | |
337 | ||
fa027c2a | 338 | static const struct file_operations typhoon_fops = { |
1da177e4 LT |
339 | .owner = THIS_MODULE, |
340 | .open = video_exclusive_open, | |
341 | .release = video_exclusive_release, | |
3f6892ac | 342 | .ioctl = video_ioctl2, |
0d0fbf81 | 343 | .compat_ioctl = v4l_compat_ioctl32, |
1da177e4 LT |
344 | .llseek = no_llseek, |
345 | }; | |
346 | ||
347 | static struct video_device typhoon_radio = | |
348 | { | |
349 | .owner = THIS_MODULE, | |
350 | .name = "Typhoon Radio", | |
351 | .type = VID_TYPE_TUNER, | |
1da177e4 | 352 | .fops = &typhoon_fops, |
3f6892ac DL |
353 | .vidioc_querycap = vidioc_querycap, |
354 | .vidioc_g_tuner = vidioc_g_tuner, | |
355 | .vidioc_s_tuner = vidioc_s_tuner, | |
356 | .vidioc_g_audio = vidioc_g_audio, | |
357 | .vidioc_s_audio = vidioc_s_audio, | |
358 | .vidioc_g_input = vidioc_g_input, | |
359 | .vidioc_s_input = vidioc_s_input, | |
360 | .vidioc_g_frequency = vidioc_g_frequency, | |
361 | .vidioc_s_frequency = vidioc_s_frequency, | |
362 | .vidioc_queryctrl = vidioc_queryctrl, | |
363 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
364 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1da177e4 LT |
365 | }; |
366 | ||
367 | #ifdef CONFIG_RADIO_TYPHOON_PROC_FS | |
368 | ||
369 | static int typhoon_get_info(char *buf, char **start, off_t offset, int len) | |
370 | { | |
371 | char *out = buf; | |
372 | ||
373 | #ifdef MODULE | |
374 | #define MODULEPROCSTRING "Driver loaded as a module" | |
375 | #else | |
376 | #define MODULEPROCSTRING "Driver compiled into kernel" | |
377 | #endif | |
378 | ||
379 | /* output must be kept under PAGE_SIZE */ | |
380 | out += sprintf(out, BANNER); | |
381 | out += sprintf(out, "Load type: " MODULEPROCSTRING "\n\n"); | |
382 | out += sprintf(out, "frequency = %lu kHz\n", | |
383 | typhoon_unit.curfreq >> 4); | |
384 | out += sprintf(out, "volume = %d\n", typhoon_unit.curvol); | |
385 | out += sprintf(out, "mute = %s\n", typhoon_unit.muted ? | |
386 | "on" : "off"); | |
387 | out += sprintf(out, "iobase = 0x%x\n", typhoon_unit.iobase); | |
388 | out += sprintf(out, "mute frequency = %lu kHz\n", | |
389 | typhoon_unit.mutefreq >> 4); | |
390 | return out - buf; | |
391 | } | |
392 | ||
393 | #endif /* CONFIG_RADIO_TYPHOON_PROC_FS */ | |
394 | ||
395 | MODULE_AUTHOR("Dr. Henrik Seidel"); | |
396 | MODULE_DESCRIPTION("A driver for the Typhoon radio card (a.k.a. EcoRadio)."); | |
397 | MODULE_LICENSE("GPL"); | |
398 | ||
399 | static int io = -1; | |
400 | static int radio_nr = -1; | |
401 | ||
402 | module_param(io, int, 0); | |
403 | MODULE_PARM_DESC(io, "I/O address of the Typhoon card (0x316 or 0x336)"); | |
404 | module_param(radio_nr, int, 0); | |
405 | ||
406 | #ifdef MODULE | |
ff699e6b | 407 | static unsigned long mutefreq; |
1da177e4 LT |
408 | module_param(mutefreq, ulong, 0); |
409 | MODULE_PARM_DESC(mutefreq, "Frequency used when muting the card (in kHz)"); | |
410 | #endif | |
411 | ||
412 | static int __init typhoon_init(void) | |
413 | { | |
414 | #ifdef MODULE | |
415 | if (io == -1) { | |
416 | printk(KERN_ERR "radio-typhoon: You must set an I/O address with io=0x316 or io=0x336\n"); | |
417 | return -EINVAL; | |
418 | } | |
419 | typhoon_unit.iobase = io; | |
420 | ||
421 | if (mutefreq < 87000 || mutefreq > 108500) { | |
422 | printk(KERN_ERR "radio-typhoon: You must set a frequency (in kHz) used when muting the card,\n"); | |
423 | printk(KERN_ERR "radio-typhoon: e.g. with \"mutefreq=87500\" (87000 <= mutefreq <= 108500)\n"); | |
424 | return -EINVAL; | |
425 | } | |
426 | typhoon_unit.mutefreq = mutefreq; | |
427 | #endif /* MODULE */ | |
428 | ||
429 | printk(KERN_INFO BANNER); | |
3593cab5 | 430 | mutex_init(&typhoon_unit.lock); |
1da177e4 LT |
431 | io = typhoon_unit.iobase; |
432 | if (!request_region(io, 8, "typhoon")) { | |
433 | printk(KERN_ERR "radio-typhoon: port 0x%x already in use\n", | |
434 | typhoon_unit.iobase); | |
435 | return -EBUSY; | |
436 | } | |
437 | ||
438 | typhoon_radio.priv = &typhoon_unit; | |
439 | if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) == -1) | |
440 | { | |
441 | release_region(io, 8); | |
442 | return -EINVAL; | |
443 | } | |
444 | printk(KERN_INFO "radio-typhoon: port 0x%x.\n", typhoon_unit.iobase); | |
445 | printk(KERN_INFO "radio-typhoon: mute frequency is %lu kHz.\n", | |
446 | typhoon_unit.mutefreq); | |
447 | typhoon_unit.mutefreq <<= 4; | |
448 | ||
449 | /* mute card - prevents noisy bootups */ | |
450 | typhoon_mute(&typhoon_unit); | |
451 | ||
452 | #ifdef CONFIG_RADIO_TYPHOON_PROC_FS | |
453 | if (!create_proc_info_entry("driver/radio-typhoon", 0, NULL, | |
4286c6f6 | 454 | typhoon_get_info)) |
657de3cd | 455 | printk(KERN_ERR "radio-typhoon: registering /proc/driver/radio-typhoon failed\n"); |
1da177e4 LT |
456 | #endif |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
461 | static void __exit typhoon_cleanup_module(void) | |
462 | { | |
463 | ||
464 | #ifdef CONFIG_RADIO_TYPHOON_PROC_FS | |
465 | remove_proc_entry("driver/radio-typhoon", NULL); | |
466 | #endif | |
467 | ||
468 | video_unregister_device(&typhoon_radio); | |
469 | release_region(io, 8); | |
470 | } | |
471 | ||
472 | module_init(typhoon_init); | |
473 | module_exit(typhoon_cleanup_module); | |
474 |