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Commit | Line | Data |
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4286c6f6 | 1 | /* radio-aztech.c - Aztech radio card driver for Linux 2.2 |
1da177e4 | 2 | * |
a4366af4 | 3 | * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> |
4286c6f6 | 4 | * Adapted to support the Video for Linux API by |
1da177e4 LT |
5 | * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by: |
6 | * | |
7 | * Quay Ly | |
8 | * Donald Song | |
4286c6f6 | 9 | * Jason Lewis (jlewis@twilight.vtc.vsc.edu) |
1da177e4 LT |
10 | * Scott McGrath (smcgrath@twilight.vtc.vsc.edu) |
11 | * William McGrath (wmcgrath@twilight.vtc.vsc.edu) | |
12 | * | |
13 | * The basis for this code may be found at http://bigbang.vtc.vsc.edu/fmradio/ | |
14 | * along with more information on the card itself. | |
15 | * | |
16 | * History: | |
17 | * 1999-02-24 Russell Kroll <rkroll@exploits.org> | |
18 | * Fine tuning/VIDEO_TUNER_LOW | |
19 | * Range expanded to 87-108 MHz (from 87.9-107.8) | |
20 | * | |
21 | * Notable changes from the original source: | |
22 | * - includes stripped down to the essentials | |
23 | * - for loops used as delays replaced with udelay() | |
24 | * - #defines removed, changed to static values | |
25 | * - tuning structure changed - no more character arrays, other changes | |
26 | */ | |
27 | ||
28 | #include <linux/module.h> /* Modules */ | |
29 | #include <linux/init.h> /* Initdata */ | |
fb911ee8 | 30 | #include <linux/ioport.h> /* request_region */ |
1da177e4 LT |
31 | #include <linux/delay.h> /* udelay */ |
32 | #include <asm/io.h> /* outb, outb_p */ | |
33 | #include <asm/uaccess.h> /* copy to/from user */ | |
a4366af4 | 34 | #include <linux/videodev2.h> /* kernel radio structs */ |
5e87efa3 | 35 | #include <media/v4l2-common.h> |
35ea11ff | 36 | #include <media/v4l2-ioctl.h> |
1da177e4 | 37 | |
a4366af4 MCC |
38 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ |
39 | #define RADIO_VERSION KERNEL_VERSION(0,0,2) | |
40 | ||
41 | static struct v4l2_queryctrl radio_qctrl[] = { | |
42 | { | |
43 | .id = V4L2_CID_AUDIO_MUTE, | |
44 | .name = "Mute", | |
45 | .minimum = 0, | |
46 | .maximum = 1, | |
47 | .default_value = 1, | |
48 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
49 | },{ | |
50 | .id = V4L2_CID_AUDIO_VOLUME, | |
51 | .name = "Volume", | |
52 | .minimum = 0, | |
53 | .maximum = 0xff, | |
54 | .step = 1, | |
55 | .default_value = 0xff, | |
56 | .type = V4L2_CTRL_TYPE_INTEGER, | |
57 | } | |
58 | }; | |
59 | ||
1da177e4 LT |
60 | /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */ |
61 | ||
62 | #ifndef CONFIG_RADIO_AZTECH_PORT | |
63 | #define CONFIG_RADIO_AZTECH_PORT -1 | |
64 | #endif | |
65 | ||
4286c6f6 | 66 | static int io = CONFIG_RADIO_AZTECH_PORT; |
1da177e4 LT |
67 | static int radio_nr = -1; |
68 | static int radio_wait_time = 1000; | |
3593cab5 | 69 | static struct mutex lock; |
1da177e4 LT |
70 | |
71 | struct az_device | |
72 | { | |
3ca685aa | 73 | unsigned long in_use; |
1da177e4 LT |
74 | int curvol; |
75 | unsigned long curfreq; | |
76 | int stereo; | |
77 | }; | |
78 | ||
79 | static int volconvert(int level) | |
80 | { | |
4286c6f6 MCC |
81 | level>>=14; /* Map 16bits down to 2 bit */ |
82 | level&=3; | |
83 | ||
1da177e4 | 84 | /* convert to card-friendly values */ |
4286c6f6 | 85 | switch (level) |
1da177e4 | 86 | { |
4286c6f6 | 87 | case 0: |
1da177e4 | 88 | return 0; |
4286c6f6 | 89 | case 1: |
1da177e4 LT |
90 | return 1; |
91 | case 2: | |
92 | return 4; | |
93 | case 3: | |
94 | return 5; | |
95 | } | |
96 | return 0; /* Quieten gcc */ | |
97 | } | |
98 | ||
99 | static void send_0_byte (struct az_device *dev) | |
100 | { | |
101 | udelay(radio_wait_time); | |
102 | outb_p(2+volconvert(dev->curvol), io); | |
103 | outb_p(64+2+volconvert(dev->curvol), io); | |
104 | } | |
105 | ||
106 | static void send_1_byte (struct az_device *dev) | |
107 | { | |
108 | udelay (radio_wait_time); | |
109 | outb_p(128+2+volconvert(dev->curvol), io); | |
110 | outb_p(128+64+2+volconvert(dev->curvol), io); | |
111 | } | |
112 | ||
113 | static int az_setvol(struct az_device *dev, int vol) | |
114 | { | |
3593cab5 | 115 | mutex_lock(&lock); |
1da177e4 | 116 | outb (volconvert(vol), io); |
3593cab5 | 117 | mutex_unlock(&lock); |
1da177e4 LT |
118 | return 0; |
119 | } | |
120 | ||
121 | /* thanks to Michael Dwyer for giving me a dose of clues in | |
122 | * the signal strength department.. | |
123 | * | |
124 | * This card has a stereo bit - bit 0 set = mono, not set = stereo | |
125 | * It also has a "signal" bit - bit 1 set = bad signal, not set = good | |
126 | * | |
127 | */ | |
128 | ||
129 | static int az_getsigstr(struct az_device *dev) | |
130 | { | |
131 | if (inb(io) & 2) /* bit set = no signal present */ | |
132 | return 0; | |
133 | return 1; /* signal present */ | |
134 | } | |
135 | ||
136 | static int az_getstereo(struct az_device *dev) | |
137 | { | |
138 | if (inb(io) & 1) /* bit set = mono */ | |
139 | return 0; | |
140 | return 1; /* stereo */ | |
141 | } | |
142 | ||
143 | static int az_setfreq(struct az_device *dev, unsigned long frequency) | |
144 | { | |
145 | int i; | |
146 | ||
147 | frequency += 171200; /* Add 10.7 MHz IF */ | |
148 | frequency /= 800; /* Convert to 50 kHz units */ | |
4286c6f6 | 149 | |
3593cab5 | 150 | mutex_lock(&lock); |
4286c6f6 | 151 | |
1da177e4 LT |
152 | send_0_byte (dev); /* 0: LSB of frequency */ |
153 | ||
154 | for (i = 0; i < 13; i++) /* : frequency bits (1-13) */ | |
155 | if (frequency & (1 << i)) | |
156 | send_1_byte (dev); | |
157 | else | |
158 | send_0_byte (dev); | |
159 | ||
160 | send_0_byte (dev); /* 14: test bit - always 0 */ | |
161 | send_0_byte (dev); /* 15: test bit - always 0 */ | |
162 | send_0_byte (dev); /* 16: band data 0 - always 0 */ | |
163 | if (dev->stereo) /* 17: stereo (1 to enable) */ | |
164 | send_1_byte (dev); | |
165 | else | |
166 | send_0_byte (dev); | |
167 | ||
168 | send_1_byte (dev); /* 18: band data 1 - unknown */ | |
169 | send_0_byte (dev); /* 19: time base - always 0 */ | |
170 | send_0_byte (dev); /* 20: spacing (0 = 25 kHz) */ | |
171 | send_1_byte (dev); /* 21: spacing (1 = 25 kHz) */ | |
172 | send_0_byte (dev); /* 22: spacing (0 = 25 kHz) */ | |
173 | send_1_byte (dev); /* 23: AM/FM (FM = 1, always) */ | |
174 | ||
175 | /* latch frequency */ | |
176 | ||
177 | udelay (radio_wait_time); | |
178 | outb_p(128+64+volconvert(dev->curvol), io); | |
4286c6f6 | 179 | |
3593cab5 | 180 | mutex_unlock(&lock); |
1da177e4 LT |
181 | |
182 | return 0; | |
183 | } | |
184 | ||
99218fe4 MCC |
185 | static int vidioc_querycap (struct file *file, void *priv, |
186 | struct v4l2_capability *v) | |
187 | { | |
188 | strlcpy(v->driver, "radio-aztech", sizeof (v->driver)); | |
189 | strlcpy(v->card, "Aztech Radio", sizeof (v->card)); | |
190 | sprintf(v->bus_info,"ISA"); | |
191 | v->version = RADIO_VERSION; | |
192 | v->capabilities = V4L2_CAP_TUNER; | |
193 | return 0; | |
194 | } | |
195 | ||
196 | static int vidioc_g_tuner (struct file *file, void *priv, | |
197 | struct v4l2_tuner *v) | |
1da177e4 LT |
198 | { |
199 | struct video_device *dev = video_devdata(file); | |
200 | struct az_device *az = dev->priv; | |
4286c6f6 | 201 | |
99218fe4 MCC |
202 | if (v->index > 0) |
203 | return -EINVAL; | |
a4366af4 | 204 | |
99218fe4 MCC |
205 | strcpy(v->name, "FM"); |
206 | v->type = V4L2_TUNER_RADIO; | |
a4366af4 | 207 | |
99218fe4 MCC |
208 | v->rangelow=(87*16000); |
209 | v->rangehigh=(108*16000); | |
210 | v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO; | |
211 | v->capability=V4L2_TUNER_CAP_LOW; | |
212 | if(az_getstereo(az)) | |
213 | v->audmode = V4L2_TUNER_MODE_STEREO; | |
214 | else | |
215 | v->audmode = V4L2_TUNER_MODE_MONO; | |
216 | v->signal=0xFFFF*az_getsigstr(az); | |
a4366af4 | 217 | |
99218fe4 MCC |
218 | return 0; |
219 | } | |
a4366af4 | 220 | |
a4366af4 | 221 | |
99218fe4 MCC |
222 | static int vidioc_s_tuner (struct file *file, void *priv, |
223 | struct v4l2_tuner *v) | |
224 | { | |
225 | if (v->index > 0) | |
226 | return -EINVAL; | |
a4366af4 | 227 | |
99218fe4 MCC |
228 | return 0; |
229 | } | |
a4366af4 | 230 | |
676b0ac7 MCC |
231 | static int vidioc_g_audio (struct file *file, void *priv, |
232 | struct v4l2_audio *a) | |
233 | { | |
234 | if (a->index > 1) | |
235 | return -EINVAL; | |
236 | ||
237 | strcpy(a->name, "Radio"); | |
238 | a->capability = V4L2_AUDCAP_STEREO; | |
239 | return 0; | |
240 | } | |
241 | ||
a0c05ab9 MCC |
242 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) |
243 | { | |
244 | *i = 0; | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
249 | { | |
250 | if (i != 0) | |
251 | return -EINVAL; | |
252 | return 0; | |
253 | } | |
254 | ||
255 | ||
676b0ac7 MCC |
256 | static int vidioc_s_audio (struct file *file, void *priv, |
257 | struct v4l2_audio *a) | |
258 | { | |
259 | if (a->index != 0) | |
260 | return -EINVAL; | |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
99218fe4 MCC |
265 | static int vidioc_s_frequency (struct file *file, void *priv, |
266 | struct v4l2_frequency *f) | |
267 | { | |
268 | struct video_device *dev = video_devdata(file); | |
269 | struct az_device *az = dev->priv; | |
a4366af4 | 270 | |
99218fe4 MCC |
271 | az->curfreq = f->frequency; |
272 | az_setfreq(az, az->curfreq); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | static int vidioc_g_frequency (struct file *file, void *priv, | |
277 | struct v4l2_frequency *f) | |
278 | { | |
279 | struct video_device *dev = video_devdata(file); | |
280 | struct az_device *az = dev->priv; | |
281 | ||
282 | f->type = V4L2_TUNER_RADIO; | |
283 | f->frequency = az->curfreq; | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | static int vidioc_queryctrl (struct file *file, void *priv, | |
289 | struct v4l2_queryctrl *qc) | |
290 | { | |
291 | int i; | |
292 | ||
293 | for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { | |
294 | if (qc->id && qc->id == radio_qctrl[i].id) { | |
295 | memcpy(qc, &(radio_qctrl[i]), | |
296 | sizeof(*qc)); | |
297 | return (0); | |
1da177e4 | 298 | } |
99218fe4 MCC |
299 | } |
300 | return -EINVAL; | |
301 | } | |
a4366af4 | 302 | |
99218fe4 MCC |
303 | static int vidioc_g_ctrl (struct file *file, void *priv, |
304 | struct v4l2_control *ctrl) | |
305 | { | |
306 | struct video_device *dev = video_devdata(file); | |
307 | struct az_device *az = dev->priv; | |
308 | ||
309 | switch (ctrl->id) { | |
310 | case V4L2_CID_AUDIO_MUTE: | |
311 | if (az->curvol==0) | |
312 | ctrl->value=1; | |
313 | else | |
314 | ctrl->value=0; | |
315 | return (0); | |
316 | case V4L2_CID_AUDIO_VOLUME: | |
317 | ctrl->value=az->curvol * 6554; | |
318 | return (0); | |
1da177e4 | 319 | } |
99218fe4 | 320 | return -EINVAL; |
1da177e4 LT |
321 | } |
322 | ||
99218fe4 MCC |
323 | static int vidioc_s_ctrl (struct file *file, void *priv, |
324 | struct v4l2_control *ctrl) | |
1da177e4 | 325 | { |
99218fe4 MCC |
326 | struct video_device *dev = video_devdata(file); |
327 | struct az_device *az = dev->priv; | |
328 | ||
329 | switch (ctrl->id) { | |
330 | case V4L2_CID_AUDIO_MUTE: | |
331 | if (ctrl->value) { | |
332 | az_setvol(az,0); | |
333 | } else { | |
334 | az_setvol(az,az->curvol); | |
335 | } | |
336 | return (0); | |
337 | case V4L2_CID_AUDIO_VOLUME: | |
338 | az_setvol(az,ctrl->value); | |
339 | return (0); | |
340 | } | |
341 | return -EINVAL; | |
1da177e4 LT |
342 | } |
343 | ||
344 | static struct az_device aztech_unit; | |
345 | ||
3ca685aa HV |
346 | static int aztech_exclusive_open(struct inode *inode, struct file *file) |
347 | { | |
348 | return test_and_set_bit(0, &aztech_unit.in_use) ? -EBUSY : 0; | |
349 | } | |
350 | ||
351 | static int aztech_exclusive_release(struct inode *inode, struct file *file) | |
352 | { | |
353 | clear_bit(0, &aztech_unit.in_use); | |
354 | return 0; | |
355 | } | |
356 | ||
fa027c2a | 357 | static const struct file_operations aztech_fops = { |
1da177e4 | 358 | .owner = THIS_MODULE, |
3ca685aa HV |
359 | .open = aztech_exclusive_open, |
360 | .release = aztech_exclusive_release, | |
99218fe4 | 361 | .ioctl = video_ioctl2, |
078ff795 | 362 | #ifdef CONFIG_COMPAT |
0d0fbf81 | 363 | .compat_ioctl = v4l_compat_ioctl32, |
078ff795 | 364 | #endif |
1da177e4 LT |
365 | .llseek = no_llseek, |
366 | }; | |
367 | ||
a399810c | 368 | static const struct v4l2_ioctl_ops aztech_ioctl_ops = { |
99218fe4 MCC |
369 | .vidioc_querycap = vidioc_querycap, |
370 | .vidioc_g_tuner = vidioc_g_tuner, | |
371 | .vidioc_s_tuner = vidioc_s_tuner, | |
676b0ac7 MCC |
372 | .vidioc_g_audio = vidioc_g_audio, |
373 | .vidioc_s_audio = vidioc_s_audio, | |
a0c05ab9 MCC |
374 | .vidioc_g_input = vidioc_g_input, |
375 | .vidioc_s_input = vidioc_s_input, | |
99218fe4 MCC |
376 | .vidioc_g_frequency = vidioc_g_frequency, |
377 | .vidioc_s_frequency = vidioc_s_frequency, | |
378 | .vidioc_queryctrl = vidioc_queryctrl, | |
379 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
380 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1da177e4 LT |
381 | }; |
382 | ||
a399810c | 383 | static struct video_device aztech_radio = { |
a399810c | 384 | .name = "Aztech radio", |
a399810c HV |
385 | .fops = &aztech_fops, |
386 | .ioctl_ops = &aztech_ioctl_ops, | |
387 | }; | |
388 | ||
99218fe4 MCC |
389 | module_param_named(debug,aztech_radio.debug, int, 0644); |
390 | MODULE_PARM_DESC(debug,"activates debug info"); | |
391 | ||
1da177e4 LT |
392 | static int __init aztech_init(void) |
393 | { | |
394 | if(io==-1) | |
395 | { | |
396 | printk(KERN_ERR "You must set an I/O address with io=0x???\n"); | |
397 | return -EINVAL; | |
398 | } | |
399 | ||
4286c6f6 | 400 | if (!request_region(io, 2, "aztech")) |
1da177e4 LT |
401 | { |
402 | printk(KERN_ERR "aztech: port 0x%x already in use\n", io); | |
403 | return -EBUSY; | |
404 | } | |
405 | ||
3593cab5 | 406 | mutex_init(&lock); |
1da177e4 | 407 | aztech_radio.priv=&aztech_unit; |
4286c6f6 | 408 | |
cba99ae8 | 409 | if (video_register_device(&aztech_radio, VFL_TYPE_RADIO, radio_nr) < 0) { |
1da177e4 LT |
410 | release_region(io,2); |
411 | return -EINVAL; | |
412 | } | |
4286c6f6 | 413 | |
1da177e4 LT |
414 | printk(KERN_INFO "Aztech radio card driver v1.00/19990224 rkroll@exploits.org\n"); |
415 | /* mute card - prevents noisy bootups */ | |
416 | outb (0, io); | |
417 | return 0; | |
418 | } | |
419 | ||
420 | MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath"); | |
421 | MODULE_DESCRIPTION("A driver for the Aztech radio card."); | |
422 | MODULE_LICENSE("GPL"); | |
423 | ||
424 | module_param(io, int, 0); | |
425 | module_param(radio_nr, int, 0); | |
426 | MODULE_PARM_DESC(io, "I/O address of the Aztech card (0x350 or 0x358)"); | |
427 | ||
428 | static void __exit aztech_cleanup(void) | |
429 | { | |
430 | video_unregister_device(&aztech_radio); | |
431 | release_region(io,2); | |
432 | } | |
433 | ||
434 | module_init(aztech_init); | |
435 | module_exit(aztech_cleanup); |