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 | 37 | #include <linux/proc_fs.h> /* radio card status report */ |
0b9c2b7a | 38 | #include <linux/seq_file.h> |
1da177e4 LT |
39 | #include <asm/io.h> /* outb, outb_p */ |
40 | #include <asm/uaccess.h> /* copy to/from user */ | |
30c48305 | 41 | #include <linux/videodev2.h> /* kernel radio structs */ |
5e87efa3 | 42 | #include <media/v4l2-common.h> |
35ea11ff | 43 | #include <media/v4l2-ioctl.h> |
1da177e4 | 44 | |
30c48305 MCC |
45 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ |
46 | #define RADIO_VERSION KERNEL_VERSION(0,1,1) | |
47 | #define BANNER "Typhoon Radio Card driver v0.1.1\n" | |
48 | ||
49 | static struct v4l2_queryctrl radio_qctrl[] = { | |
50 | { | |
51 | .id = V4L2_CID_AUDIO_MUTE, | |
52 | .name = "Mute", | |
53 | .minimum = 0, | |
54 | .maximum = 1, | |
55 | .default_value = 1, | |
56 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
57 | },{ | |
58 | .id = V4L2_CID_AUDIO_VOLUME, | |
59 | .name = "Volume", | |
60 | .minimum = 0, | |
61 | .maximum = 65535, | |
62 | .step = 1<<14, | |
63 | .default_value = 0xff, | |
64 | .type = V4L2_CTRL_TYPE_INTEGER, | |
65 | } | |
66 | }; | |
67 | ||
1da177e4 LT |
68 | |
69 | #ifndef CONFIG_RADIO_TYPHOON_PORT | |
70 | #define CONFIG_RADIO_TYPHOON_PORT -1 | |
71 | #endif | |
72 | ||
73 | #ifndef CONFIG_RADIO_TYPHOON_MUTEFREQ | |
74 | #define CONFIG_RADIO_TYPHOON_MUTEFREQ 0 | |
75 | #endif | |
76 | ||
77 | #ifndef CONFIG_PROC_FS | |
78 | #undef CONFIG_RADIO_TYPHOON_PROC_FS | |
79 | #endif | |
80 | ||
81 | struct typhoon_device { | |
3ca685aa | 82 | unsigned long in_use; |
1da177e4 LT |
83 | int iobase; |
84 | int curvol; | |
85 | int muted; | |
86 | unsigned long curfreq; | |
87 | unsigned long mutefreq; | |
3593cab5 | 88 | struct mutex lock; |
1da177e4 LT |
89 | }; |
90 | ||
91 | static void typhoon_setvol_generic(struct typhoon_device *dev, int vol); | |
92 | static int typhoon_setfreq_generic(struct typhoon_device *dev, | |
93 | unsigned long frequency); | |
94 | static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency); | |
95 | static void typhoon_mute(struct typhoon_device *dev); | |
96 | static void typhoon_unmute(struct typhoon_device *dev); | |
97 | static int typhoon_setvol(struct typhoon_device *dev, int vol); | |
1da177e4 LT |
98 | |
99 | static void typhoon_setvol_generic(struct typhoon_device *dev, int vol) | |
100 | { | |
3593cab5 | 101 | mutex_lock(&dev->lock); |
1da177e4 LT |
102 | vol >>= 14; /* Map 16 bit to 2 bit */ |
103 | vol &= 3; | |
104 | outb_p(vol / 2, dev->iobase); /* Set the volume, high bit. */ | |
105 | outb_p(vol % 2, dev->iobase + 2); /* Set the volume, low bit. */ | |
3593cab5 | 106 | mutex_unlock(&dev->lock); |
1da177e4 LT |
107 | } |
108 | ||
109 | static int typhoon_setfreq_generic(struct typhoon_device *dev, | |
110 | unsigned long frequency) | |
111 | { | |
112 | unsigned long outval; | |
113 | unsigned long x; | |
114 | ||
115 | /* | |
116 | * The frequency transfer curve is not linear. The best fit I could | |
117 | * get is | |
118 | * | |
119 | * outval = -155 + exp((f + 15.55) * 0.057)) | |
120 | * | |
121 | * where frequency f is in MHz. Since we don't have exp in the kernel, | |
122 | * I approximate this function by a third order polynomial. | |
123 | * | |
124 | */ | |
125 | ||
3593cab5 | 126 | mutex_lock(&dev->lock); |
1da177e4 LT |
127 | x = frequency / 160; |
128 | outval = (x * x + 2500) / 5000; | |
129 | outval = (outval * x + 5000) / 10000; | |
130 | outval -= (10 * x * x + 10433) / 20866; | |
131 | outval += 4 * x - 11505; | |
132 | ||
133 | outb_p((outval >> 8) & 0x01, dev->iobase + 4); | |
134 | outb_p(outval >> 9, dev->iobase + 6); | |
135 | outb_p(outval & 0xff, dev->iobase + 8); | |
3593cab5 | 136 | mutex_unlock(&dev->lock); |
1da177e4 LT |
137 | |
138 | return 0; | |
139 | } | |
140 | ||
141 | static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency) | |
142 | { | |
143 | typhoon_setfreq_generic(dev, frequency); | |
144 | dev->curfreq = frequency; | |
145 | return 0; | |
146 | } | |
147 | ||
148 | static void typhoon_mute(struct typhoon_device *dev) | |
149 | { | |
150 | if (dev->muted == 1) | |
151 | return; | |
152 | typhoon_setvol_generic(dev, 0); | |
153 | typhoon_setfreq_generic(dev, dev->mutefreq); | |
154 | dev->muted = 1; | |
155 | } | |
156 | ||
157 | static void typhoon_unmute(struct typhoon_device *dev) | |
158 | { | |
159 | if (dev->muted == 0) | |
160 | return; | |
161 | typhoon_setfreq_generic(dev, dev->curfreq); | |
162 | typhoon_setvol_generic(dev, dev->curvol); | |
163 | dev->muted = 0; | |
164 | } | |
165 | ||
166 | static int typhoon_setvol(struct typhoon_device *dev, int vol) | |
167 | { | |
168 | if (dev->muted && vol != 0) { /* user is unmuting the card */ | |
169 | dev->curvol = vol; | |
170 | typhoon_unmute(dev); | |
171 | return 0; | |
172 | } | |
173 | if (vol == dev->curvol) /* requested volume == current */ | |
174 | return 0; | |
175 | ||
176 | if (vol == 0) { /* volume == 0 means mute the card */ | |
177 | typhoon_mute(dev); | |
178 | dev->curvol = vol; | |
179 | return 0; | |
180 | } | |
181 | typhoon_setvol_generic(dev, vol); | |
182 | dev->curvol = vol; | |
183 | return 0; | |
184 | } | |
185 | ||
3f6892ac DL |
186 | static int vidioc_querycap(struct file *file, void *priv, |
187 | struct v4l2_capability *v) | |
188 | { | |
189 | strlcpy(v->driver, "radio-typhoon", sizeof(v->driver)); | |
190 | strlcpy(v->card, "Typhoon Radio", sizeof(v->card)); | |
191 | sprintf(v->bus_info, "ISA"); | |
192 | v->version = RADIO_VERSION; | |
193 | v->capabilities = V4L2_CAP_TUNER; | |
194 | return 0; | |
195 | } | |
196 | ||
197 | static int vidioc_g_tuner(struct file *file, void *priv, | |
198 | struct v4l2_tuner *v) | |
199 | { | |
200 | if (v->index > 0) | |
201 | return -EINVAL; | |
202 | ||
203 | strcpy(v->name, "FM"); | |
204 | v->type = V4L2_TUNER_RADIO; | |
205 | v->rangelow = (87.5*16000); | |
206 | v->rangehigh = (108*16000); | |
207 | v->rxsubchans = V4L2_TUNER_SUB_MONO; | |
208 | v->capability = V4L2_TUNER_CAP_LOW; | |
209 | v->audmode = V4L2_TUNER_MODE_MONO; | |
210 | v->signal = 0xFFFF; /* We can't get the signal strength */ | |
211 | return 0; | |
212 | } | |
1da177e4 | 213 | |
3f6892ac DL |
214 | static int vidioc_s_tuner(struct file *file, void *priv, |
215 | struct v4l2_tuner *v) | |
216 | { | |
217 | if (v->index > 0) | |
218 | return -EINVAL; | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | static int vidioc_s_frequency(struct file *file, void *priv, | |
224 | struct v4l2_frequency *f) | |
1da177e4 | 225 | { |
c170ecf4 | 226 | struct typhoon_device *typhoon = video_drvdata(file); |
1da177e4 | 227 | |
3f6892ac DL |
228 | typhoon->curfreq = f->frequency; |
229 | typhoon_setfreq(typhoon, typhoon->curfreq); | |
230 | return 0; | |
231 | } | |
30c48305 | 232 | |
3f6892ac DL |
233 | static int vidioc_g_frequency(struct file *file, void *priv, |
234 | struct v4l2_frequency *f) | |
235 | { | |
c170ecf4 | 236 | struct typhoon_device *typhoon = video_drvdata(file); |
30c48305 | 237 | |
3f6892ac DL |
238 | f->type = V4L2_TUNER_RADIO; |
239 | f->frequency = typhoon->curfreq; | |
30c48305 | 240 | |
3f6892ac DL |
241 | return 0; |
242 | } | |
30c48305 | 243 | |
3f6892ac DL |
244 | static int vidioc_queryctrl(struct file *file, void *priv, |
245 | struct v4l2_queryctrl *qc) | |
246 | { | |
247 | int i; | |
30c48305 | 248 | |
3f6892ac DL |
249 | for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { |
250 | if (qc->id && qc->id == radio_qctrl[i].id) { | |
251 | memcpy(qc, &(radio_qctrl[i]), | |
252 | sizeof(*qc)); | |
1da177e4 LT |
253 | return 0; |
254 | } | |
3f6892ac DL |
255 | } |
256 | return -EINVAL; | |
257 | } | |
30c48305 | 258 | |
3f6892ac DL |
259 | static int vidioc_g_ctrl(struct file *file, void *priv, |
260 | struct v4l2_control *ctrl) | |
261 | { | |
c170ecf4 | 262 | struct typhoon_device *typhoon = video_drvdata(file); |
30c48305 | 263 | |
3f6892ac DL |
264 | switch (ctrl->id) { |
265 | case V4L2_CID_AUDIO_MUTE: | |
266 | ctrl->value = typhoon->muted; | |
267 | return 0; | |
268 | case V4L2_CID_AUDIO_VOLUME: | |
269 | ctrl->value = typhoon->curvol; | |
270 | return 0; | |
271 | } | |
272 | return -EINVAL; | |
273 | } | |
30c48305 | 274 | |
3f6892ac DL |
275 | static int vidioc_s_ctrl (struct file *file, void *priv, |
276 | struct v4l2_control *ctrl) | |
277 | { | |
c170ecf4 | 278 | struct typhoon_device *typhoon = video_drvdata(file); |
30c48305 | 279 | |
3f6892ac DL |
280 | switch (ctrl->id) { |
281 | case V4L2_CID_AUDIO_MUTE: | |
282 | if (ctrl->value) | |
283 | typhoon_mute(typhoon); | |
284 | else | |
285 | typhoon_unmute(typhoon); | |
286 | return 0; | |
287 | case V4L2_CID_AUDIO_VOLUME: | |
288 | typhoon_setvol(typhoon, ctrl->value); | |
289 | return 0; | |
290 | } | |
291 | return -EINVAL; | |
292 | } | |
30c48305 | 293 | |
3f6892ac DL |
294 | static int vidioc_g_audio(struct file *file, void *priv, |
295 | struct v4l2_audio *a) | |
296 | { | |
297 | if (a->index > 1) | |
298 | return -EINVAL; | |
30c48305 | 299 | |
3f6892ac DL |
300 | strcpy(a->name, "Radio"); |
301 | a->capability = V4L2_AUDCAP_STEREO; | |
302 | return 0; | |
303 | } | |
304 | ||
305 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
306 | { | |
307 | *i = 0; | |
308 | return 0; | |
1da177e4 LT |
309 | } |
310 | ||
3f6892ac | 311 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) |
1da177e4 | 312 | { |
3f6892ac DL |
313 | if (i != 0) |
314 | return -EINVAL; | |
315 | return 0; | |
316 | } | |
317 | ||
318 | static int vidioc_s_audio(struct file *file, void *priv, | |
319 | struct v4l2_audio *a) | |
320 | { | |
321 | if (a->index != 0) | |
322 | return -EINVAL; | |
323 | return 0; | |
1da177e4 LT |
324 | } |
325 | ||
326 | static struct typhoon_device typhoon_unit = | |
327 | { | |
328 | .iobase = CONFIG_RADIO_TYPHOON_PORT, | |
329 | .curfreq = CONFIG_RADIO_TYPHOON_MUTEFREQ, | |
330 | .mutefreq = CONFIG_RADIO_TYPHOON_MUTEFREQ, | |
331 | }; | |
332 | ||
bec43661 | 333 | static int typhoon_exclusive_open(struct file *file) |
3ca685aa HV |
334 | { |
335 | return test_and_set_bit(0, &typhoon_unit.in_use) ? -EBUSY : 0; | |
336 | } | |
337 | ||
bec43661 | 338 | static int typhoon_exclusive_release(struct file *file) |
3ca685aa HV |
339 | { |
340 | clear_bit(0, &typhoon_unit.in_use); | |
341 | return 0; | |
342 | } | |
343 | ||
bec43661 | 344 | static const struct v4l2_file_operations typhoon_fops = { |
1da177e4 | 345 | .owner = THIS_MODULE, |
3ca685aa HV |
346 | .open = typhoon_exclusive_open, |
347 | .release = typhoon_exclusive_release, | |
3f6892ac | 348 | .ioctl = video_ioctl2, |
1da177e4 LT |
349 | }; |
350 | ||
a399810c | 351 | static const struct v4l2_ioctl_ops typhoon_ioctl_ops = { |
3f6892ac DL |
352 | .vidioc_querycap = vidioc_querycap, |
353 | .vidioc_g_tuner = vidioc_g_tuner, | |
354 | .vidioc_s_tuner = vidioc_s_tuner, | |
355 | .vidioc_g_audio = vidioc_g_audio, | |
356 | .vidioc_s_audio = vidioc_s_audio, | |
357 | .vidioc_g_input = vidioc_g_input, | |
358 | .vidioc_s_input = vidioc_s_input, | |
359 | .vidioc_g_frequency = vidioc_g_frequency, | |
360 | .vidioc_s_frequency = vidioc_s_frequency, | |
361 | .vidioc_queryctrl = vidioc_queryctrl, | |
362 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
363 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1da177e4 LT |
364 | }; |
365 | ||
a399810c | 366 | static struct video_device typhoon_radio = { |
a399810c | 367 | .name = "Typhoon Radio", |
a399810c HV |
368 | .fops = &typhoon_fops, |
369 | .ioctl_ops = &typhoon_ioctl_ops, | |
aa5e90af | 370 | .release = video_device_release_empty, |
a399810c HV |
371 | }; |
372 | ||
1da177e4 LT |
373 | #ifdef CONFIG_RADIO_TYPHOON_PROC_FS |
374 | ||
0b9c2b7a | 375 | static int typhoon_proc_show(struct seq_file *m, void *v) |
1da177e4 | 376 | { |
1da177e4 LT |
377 | #ifdef MODULE |
378 | #define MODULEPROCSTRING "Driver loaded as a module" | |
379 | #else | |
380 | #define MODULEPROCSTRING "Driver compiled into kernel" | |
381 | #endif | |
382 | ||
0b9c2b7a AD |
383 | seq_puts(m, BANNER); |
384 | seq_puts(m, "Load type: " MODULEPROCSTRING "\n\n"); | |
385 | seq_printf(m, "frequency = %lu kHz\n", | |
1da177e4 | 386 | typhoon_unit.curfreq >> 4); |
0b9c2b7a AD |
387 | seq_printf(m, "volume = %d\n", typhoon_unit.curvol); |
388 | seq_printf(m, "mute = %s\n", typhoon_unit.muted ? | |
1da177e4 | 389 | "on" : "off"); |
0b9c2b7a AD |
390 | seq_printf(m, "iobase = 0x%x\n", typhoon_unit.iobase); |
391 | seq_printf(m, "mute frequency = %lu kHz\n", | |
1da177e4 | 392 | typhoon_unit.mutefreq >> 4); |
0b9c2b7a | 393 | return 0; |
1da177e4 LT |
394 | } |
395 | ||
0b9c2b7a AD |
396 | static int typhoon_proc_open(struct inode *inode, struct file *file) |
397 | { | |
398 | return single_open(file, typhoon_proc_show, NULL); | |
399 | } | |
400 | ||
401 | static const struct file_operations typhoon_proc_fops = { | |
402 | .owner = THIS_MODULE, | |
403 | .open = typhoon_proc_open, | |
404 | .read = seq_read, | |
405 | .llseek = seq_lseek, | |
406 | .release = single_release, | |
407 | }; | |
1da177e4 LT |
408 | #endif /* CONFIG_RADIO_TYPHOON_PROC_FS */ |
409 | ||
410 | MODULE_AUTHOR("Dr. Henrik Seidel"); | |
411 | MODULE_DESCRIPTION("A driver for the Typhoon radio card (a.k.a. EcoRadio)."); | |
412 | MODULE_LICENSE("GPL"); | |
413 | ||
414 | static int io = -1; | |
415 | static int radio_nr = -1; | |
416 | ||
417 | module_param(io, int, 0); | |
418 | MODULE_PARM_DESC(io, "I/O address of the Typhoon card (0x316 or 0x336)"); | |
419 | module_param(radio_nr, int, 0); | |
420 | ||
421 | #ifdef MODULE | |
ff699e6b | 422 | static unsigned long mutefreq; |
1da177e4 LT |
423 | module_param(mutefreq, ulong, 0); |
424 | MODULE_PARM_DESC(mutefreq, "Frequency used when muting the card (in kHz)"); | |
425 | #endif | |
426 | ||
427 | static int __init typhoon_init(void) | |
428 | { | |
429 | #ifdef MODULE | |
430 | if (io == -1) { | |
431 | printk(KERN_ERR "radio-typhoon: You must set an I/O address with io=0x316 or io=0x336\n"); | |
432 | return -EINVAL; | |
433 | } | |
434 | typhoon_unit.iobase = io; | |
435 | ||
436 | if (mutefreq < 87000 || mutefreq > 108500) { | |
437 | printk(KERN_ERR "radio-typhoon: You must set a frequency (in kHz) used when muting the card,\n"); | |
438 | printk(KERN_ERR "radio-typhoon: e.g. with \"mutefreq=87500\" (87000 <= mutefreq <= 108500)\n"); | |
439 | return -EINVAL; | |
440 | } | |
441 | typhoon_unit.mutefreq = mutefreq; | |
442 | #endif /* MODULE */ | |
443 | ||
444 | printk(KERN_INFO BANNER); | |
3593cab5 | 445 | mutex_init(&typhoon_unit.lock); |
1da177e4 LT |
446 | io = typhoon_unit.iobase; |
447 | if (!request_region(io, 8, "typhoon")) { | |
448 | printk(KERN_ERR "radio-typhoon: port 0x%x already in use\n", | |
449 | typhoon_unit.iobase); | |
450 | return -EBUSY; | |
451 | } | |
452 | ||
601e9444 | 453 | video_set_drvdata(&typhoon_radio, &typhoon_unit); |
3ca685aa | 454 | if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) < 0) { |
1da177e4 LT |
455 | release_region(io, 8); |
456 | return -EINVAL; | |
457 | } | |
458 | printk(KERN_INFO "radio-typhoon: port 0x%x.\n", typhoon_unit.iobase); | |
459 | printk(KERN_INFO "radio-typhoon: mute frequency is %lu kHz.\n", | |
460 | typhoon_unit.mutefreq); | |
461 | typhoon_unit.mutefreq <<= 4; | |
462 | ||
463 | /* mute card - prevents noisy bootups */ | |
464 | typhoon_mute(&typhoon_unit); | |
465 | ||
466 | #ifdef CONFIG_RADIO_TYPHOON_PROC_FS | |
0b9c2b7a | 467 | if (!proc_create("driver/radio-typhoon", 0, NULL, &typhoon_proc_fops)) |
657de3cd | 468 | printk(KERN_ERR "radio-typhoon: registering /proc/driver/radio-typhoon failed\n"); |
1da177e4 LT |
469 | #endif |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
474 | static void __exit typhoon_cleanup_module(void) | |
475 | { | |
476 | ||
477 | #ifdef CONFIG_RADIO_TYPHOON_PROC_FS | |
478 | remove_proc_entry("driver/radio-typhoon", NULL); | |
479 | #endif | |
480 | ||
481 | video_unregister_device(&typhoon_radio); | |
482 | release_region(io, 8); | |
483 | } | |
484 | ||
485 | module_init(typhoon_init); | |
486 | module_exit(typhoon_cleanup_module); | |
487 |