Commit | Line | Data |
---|---|---|
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 | 31 | #include <linux/delay.h> /* udelay */ |
a4366af4 | 32 | #include <linux/videodev2.h> /* kernel radio structs */ |
e697e12e HV |
33 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ |
34 | #include <linux/io.h> /* outb, outb_p */ | |
e697e12e | 35 | #include <media/v4l2-device.h> |
35ea11ff | 36 | #include <media/v4l2-ioctl.h> |
1da177e4 | 37 | |
e697e12e HV |
38 | MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath"); |
39 | MODULE_DESCRIPTION("A driver for the Aztech radio card."); | |
40 | MODULE_LICENSE("GPL"); | |
a4366af4 | 41 | |
1da177e4 LT |
42 | /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */ |
43 | ||
44 | #ifndef CONFIG_RADIO_AZTECH_PORT | |
45 | #define CONFIG_RADIO_AZTECH_PORT -1 | |
46 | #endif | |
47 | ||
4286c6f6 | 48 | static int io = CONFIG_RADIO_AZTECH_PORT; |
1da177e4 LT |
49 | static int radio_nr = -1; |
50 | static int radio_wait_time = 1000; | |
1da177e4 | 51 | |
e697e12e HV |
52 | module_param(io, int, 0); |
53 | module_param(radio_nr, int, 0); | |
54 | MODULE_PARM_DESC(io, "I/O address of the Aztech card (0x350 or 0x358)"); | |
55 | ||
56 | #define RADIO_VERSION KERNEL_VERSION(0, 0, 2) | |
57 | ||
58 | struct aztech | |
1da177e4 | 59 | { |
e697e12e HV |
60 | struct v4l2_device v4l2_dev; |
61 | struct video_device vdev; | |
62 | int io; | |
1da177e4 LT |
63 | int curvol; |
64 | unsigned long curfreq; | |
65 | int stereo; | |
e697e12e | 66 | struct mutex lock; |
1da177e4 LT |
67 | }; |
68 | ||
e697e12e HV |
69 | static struct aztech aztech_card; |
70 | ||
1da177e4 LT |
71 | static int volconvert(int level) |
72 | { | |
e697e12e HV |
73 | level >>= 14; /* Map 16bits down to 2 bit */ |
74 | level &= 3; | |
4286c6f6 | 75 | |
1da177e4 | 76 | /* convert to card-friendly values */ |
e697e12e HV |
77 | switch (level) { |
78 | case 0: | |
79 | return 0; | |
80 | case 1: | |
81 | return 1; | |
82 | case 2: | |
83 | return 4; | |
84 | case 3: | |
85 | return 5; | |
1da177e4 LT |
86 | } |
87 | return 0; /* Quieten gcc */ | |
88 | } | |
89 | ||
e697e12e | 90 | static void send_0_byte(struct aztech *az) |
1da177e4 LT |
91 | { |
92 | udelay(radio_wait_time); | |
e697e12e HV |
93 | outb_p(2 + volconvert(az->curvol), az->io); |
94 | outb_p(64 + 2 + volconvert(az->curvol), az->io); | |
1da177e4 LT |
95 | } |
96 | ||
e697e12e | 97 | static void send_1_byte(struct aztech *az) |
1da177e4 LT |
98 | { |
99 | udelay (radio_wait_time); | |
e697e12e HV |
100 | outb_p(128 + 2 + volconvert(az->curvol), az->io); |
101 | outb_p(128 + 64 + 2 + volconvert(az->curvol), az->io); | |
1da177e4 LT |
102 | } |
103 | ||
e697e12e | 104 | static int az_setvol(struct aztech *az, int vol) |
1da177e4 | 105 | { |
e697e12e HV |
106 | mutex_lock(&az->lock); |
107 | outb(volconvert(vol), az->io); | |
108 | mutex_unlock(&az->lock); | |
1da177e4 LT |
109 | return 0; |
110 | } | |
111 | ||
112 | /* thanks to Michael Dwyer for giving me a dose of clues in | |
113 | * the signal strength department.. | |
114 | * | |
115 | * This card has a stereo bit - bit 0 set = mono, not set = stereo | |
116 | * It also has a "signal" bit - bit 1 set = bad signal, not set = good | |
117 | * | |
118 | */ | |
119 | ||
e697e12e | 120 | static int az_getsigstr(struct aztech *az) |
1da177e4 | 121 | { |
e697e12e HV |
122 | int sig = 1; |
123 | ||
124 | mutex_lock(&az->lock); | |
125 | if (inb(az->io) & 2) /* bit set = no signal present */ | |
126 | sig = 0; | |
127 | mutex_unlock(&az->lock); | |
128 | return sig; | |
1da177e4 LT |
129 | } |
130 | ||
e697e12e | 131 | static int az_getstereo(struct aztech *az) |
1da177e4 | 132 | { |
e697e12e HV |
133 | int stereo = 1; |
134 | ||
135 | mutex_lock(&az->lock); | |
136 | if (inb(az->io) & 1) /* bit set = mono */ | |
137 | stereo = 0; | |
138 | mutex_unlock(&az->lock); | |
139 | return stereo; | |
1da177e4 LT |
140 | } |
141 | ||
e697e12e | 142 | static int az_setfreq(struct aztech *az, unsigned long frequency) |
1da177e4 LT |
143 | { |
144 | int i; | |
145 | ||
e697e12e HV |
146 | mutex_lock(&az->lock); |
147 | ||
148 | az->curfreq = frequency; | |
1da177e4 LT |
149 | frequency += 171200; /* Add 10.7 MHz IF */ |
150 | frequency /= 800; /* Convert to 50 kHz units */ | |
4286c6f6 | 151 | |
e697e12e | 152 | send_0_byte(az); /* 0: LSB of frequency */ |
1da177e4 LT |
153 | |
154 | for (i = 0; i < 13; i++) /* : frequency bits (1-13) */ | |
155 | if (frequency & (1 << i)) | |
e697e12e | 156 | send_1_byte(az); |
1da177e4 | 157 | else |
e697e12e | 158 | send_0_byte(az); |
1da177e4 | 159 | |
e697e12e HV |
160 | send_0_byte(az); /* 14: test bit - always 0 */ |
161 | send_0_byte(az); /* 15: test bit - always 0 */ | |
162 | send_0_byte(az); /* 16: band data 0 - always 0 */ | |
163 | if (az->stereo) /* 17: stereo (1 to enable) */ | |
164 | send_1_byte(az); | |
1da177e4 | 165 | else |
e697e12e | 166 | send_0_byte(az); |
1da177e4 | 167 | |
e697e12e HV |
168 | send_1_byte(az); /* 18: band data 1 - unknown */ |
169 | send_0_byte(az); /* 19: time base - always 0 */ | |
170 | send_0_byte(az); /* 20: spacing (0 = 25 kHz) */ | |
171 | send_1_byte(az); /* 21: spacing (1 = 25 kHz) */ | |
172 | send_0_byte(az); /* 22: spacing (0 = 25 kHz) */ | |
173 | send_1_byte(az); /* 23: AM/FM (FM = 1, always) */ | |
1da177e4 LT |
174 | |
175 | /* latch frequency */ | |
176 | ||
e697e12e HV |
177 | udelay(radio_wait_time); |
178 | outb_p(128 + 64 + volconvert(az->curvol), az->io); | |
4286c6f6 | 179 | |
e697e12e | 180 | mutex_unlock(&az->lock); |
1da177e4 LT |
181 | |
182 | return 0; | |
183 | } | |
184 | ||
e697e12e | 185 | static int vidioc_querycap(struct file *file, void *priv, |
99218fe4 MCC |
186 | struct v4l2_capability *v) |
187 | { | |
e697e12e HV |
188 | strlcpy(v->driver, "radio-aztech", sizeof(v->driver)); |
189 | strlcpy(v->card, "Aztech Radio", sizeof(v->card)); | |
190 | strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); | |
99218fe4 | 191 | v->version = RADIO_VERSION; |
e697e12e | 192 | v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; |
99218fe4 MCC |
193 | return 0; |
194 | } | |
195 | ||
e697e12e | 196 | static int vidioc_g_tuner(struct file *file, void *priv, |
99218fe4 | 197 | struct v4l2_tuner *v) |
1da177e4 | 198 | { |
e697e12e | 199 | struct aztech *az = video_drvdata(file); |
4286c6f6 | 200 | |
99218fe4 MCC |
201 | if (v->index > 0) |
202 | return -EINVAL; | |
a4366af4 | 203 | |
e697e12e | 204 | strlcpy(v->name, "FM", sizeof(v->name)); |
99218fe4 | 205 | v->type = V4L2_TUNER_RADIO; |
a4366af4 | 206 | |
e697e12e HV |
207 | v->rangelow = 87 * 16000; |
208 | v->rangehigh = 108 * 16000; | |
209 | v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; | |
210 | v->capability = V4L2_TUNER_CAP_LOW; | |
211 | if (az_getstereo(az)) | |
99218fe4 MCC |
212 | v->audmode = V4L2_TUNER_MODE_STEREO; |
213 | else | |
214 | v->audmode = V4L2_TUNER_MODE_MONO; | |
e697e12e | 215 | v->signal = 0xFFFF * az_getsigstr(az); |
a4366af4 | 216 | |
99218fe4 MCC |
217 | return 0; |
218 | } | |
a4366af4 | 219 | |
e697e12e | 220 | static int vidioc_s_tuner(struct file *file, void *priv, |
99218fe4 MCC |
221 | struct v4l2_tuner *v) |
222 | { | |
e697e12e | 223 | return v->index ? -EINVAL : 0; |
676b0ac7 MCC |
224 | } |
225 | ||
a0c05ab9 MCC |
226 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) |
227 | { | |
228 | *i = 0; | |
229 | return 0; | |
230 | } | |
231 | ||
232 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
233 | { | |
e697e12e | 234 | return i ? -EINVAL : 0; |
a0c05ab9 MCC |
235 | } |
236 | ||
e697e12e | 237 | static int vidioc_g_audio(struct file *file, void *priv, |
676b0ac7 MCC |
238 | struct v4l2_audio *a) |
239 | { | |
e697e12e HV |
240 | a->index = 0; |
241 | strlcpy(a->name, "Radio", sizeof(a->name)); | |
242 | a->capability = V4L2_AUDCAP_STEREO; | |
676b0ac7 MCC |
243 | return 0; |
244 | } | |
245 | ||
e697e12e HV |
246 | static int vidioc_s_audio(struct file *file, void *priv, |
247 | struct v4l2_audio *a) | |
248 | { | |
249 | return a->index ? -EINVAL : 0; | |
250 | } | |
251 | ||
252 | static int vidioc_s_frequency(struct file *file, void *priv, | |
99218fe4 MCC |
253 | struct v4l2_frequency *f) |
254 | { | |
e697e12e | 255 | struct aztech *az = video_drvdata(file); |
a4366af4 | 256 | |
e697e12e | 257 | az_setfreq(az, f->frequency); |
99218fe4 MCC |
258 | return 0; |
259 | } | |
260 | ||
e697e12e | 261 | static int vidioc_g_frequency(struct file *file, void *priv, |
99218fe4 MCC |
262 | struct v4l2_frequency *f) |
263 | { | |
e697e12e | 264 | struct aztech *az = video_drvdata(file); |
99218fe4 MCC |
265 | |
266 | f->type = V4L2_TUNER_RADIO; | |
267 | f->frequency = az->curfreq; | |
99218fe4 MCC |
268 | return 0; |
269 | } | |
270 | ||
e697e12e | 271 | static int vidioc_queryctrl(struct file *file, void *priv, |
99218fe4 MCC |
272 | struct v4l2_queryctrl *qc) |
273 | { | |
e697e12e HV |
274 | switch (qc->id) { |
275 | case V4L2_CID_AUDIO_MUTE: | |
276 | return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); | |
277 | case V4L2_CID_AUDIO_VOLUME: | |
278 | return v4l2_ctrl_query_fill(qc, 0, 0xff, 1, 0xff); | |
99218fe4 MCC |
279 | } |
280 | return -EINVAL; | |
281 | } | |
a4366af4 | 282 | |
e697e12e | 283 | static int vidioc_g_ctrl(struct file *file, void *priv, |
99218fe4 MCC |
284 | struct v4l2_control *ctrl) |
285 | { | |
e697e12e | 286 | struct aztech *az = video_drvdata(file); |
99218fe4 MCC |
287 | |
288 | switch (ctrl->id) { | |
e697e12e HV |
289 | case V4L2_CID_AUDIO_MUTE: |
290 | if (az->curvol == 0) | |
291 | ctrl->value = 1; | |
292 | else | |
293 | ctrl->value = 0; | |
294 | return 0; | |
295 | case V4L2_CID_AUDIO_VOLUME: | |
296 | ctrl->value = az->curvol * 6554; | |
297 | return 0; | |
1da177e4 | 298 | } |
99218fe4 | 299 | return -EINVAL; |
1da177e4 LT |
300 | } |
301 | ||
e697e12e | 302 | static int vidioc_s_ctrl(struct file *file, void *priv, |
99218fe4 | 303 | struct v4l2_control *ctrl) |
1da177e4 | 304 | { |
e697e12e | 305 | struct aztech *az = video_drvdata(file); |
99218fe4 MCC |
306 | |
307 | switch (ctrl->id) { | |
e697e12e HV |
308 | case V4L2_CID_AUDIO_MUTE: |
309 | if (ctrl->value) | |
310 | az_setvol(az, 0); | |
311 | else | |
312 | az_setvol(az, az->curvol); | |
313 | return 0; | |
314 | case V4L2_CID_AUDIO_VOLUME: | |
315 | az_setvol(az, ctrl->value); | |
316 | return 0; | |
99218fe4 MCC |
317 | } |
318 | return -EINVAL; | |
1da177e4 LT |
319 | } |
320 | ||
bec43661 | 321 | static const struct v4l2_file_operations aztech_fops = { |
1da177e4 | 322 | .owner = THIS_MODULE, |
99218fe4 | 323 | .ioctl = video_ioctl2, |
1da177e4 LT |
324 | }; |
325 | ||
a399810c | 326 | static const struct v4l2_ioctl_ops aztech_ioctl_ops = { |
99218fe4 MCC |
327 | .vidioc_querycap = vidioc_querycap, |
328 | .vidioc_g_tuner = vidioc_g_tuner, | |
329 | .vidioc_s_tuner = vidioc_s_tuner, | |
676b0ac7 MCC |
330 | .vidioc_g_audio = vidioc_g_audio, |
331 | .vidioc_s_audio = vidioc_s_audio, | |
a0c05ab9 MCC |
332 | .vidioc_g_input = vidioc_g_input, |
333 | .vidioc_s_input = vidioc_s_input, | |
99218fe4 MCC |
334 | .vidioc_g_frequency = vidioc_g_frequency, |
335 | .vidioc_s_frequency = vidioc_s_frequency, | |
336 | .vidioc_queryctrl = vidioc_queryctrl, | |
337 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
338 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1da177e4 LT |
339 | }; |
340 | ||
341 | static int __init aztech_init(void) | |
342 | { | |
e697e12e HV |
343 | struct aztech *az = &aztech_card; |
344 | struct v4l2_device *v4l2_dev = &az->v4l2_dev; | |
345 | int res; | |
346 | ||
347 | strlcpy(v4l2_dev->name, "aztech", sizeof(v4l2_dev->name)); | |
348 | az->io = io; | |
349 | ||
350 | if (az->io == -1) { | |
b24c20cc | 351 | v4l2_err(v4l2_dev, "you must set an I/O address with io=0x350 or 0x358\n"); |
1da177e4 LT |
352 | return -EINVAL; |
353 | } | |
354 | ||
e697e12e HV |
355 | if (!request_region(az->io, 2, "aztech")) { |
356 | v4l2_err(v4l2_dev, "port 0x%x already in use\n", az->io); | |
1da177e4 LT |
357 | return -EBUSY; |
358 | } | |
359 | ||
e697e12e HV |
360 | res = v4l2_device_register(NULL, v4l2_dev); |
361 | if (res < 0) { | |
362 | release_region(az->io, 2); | |
363 | v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); | |
364 | return res; | |
365 | } | |
4286c6f6 | 366 | |
e697e12e HV |
367 | mutex_init(&az->lock); |
368 | strlcpy(az->vdev.name, v4l2_dev->name, sizeof(az->vdev.name)); | |
369 | az->vdev.v4l2_dev = v4l2_dev; | |
370 | az->vdev.fops = &aztech_fops; | |
371 | az->vdev.ioctl_ops = &aztech_ioctl_ops; | |
372 | az->vdev.release = video_device_release_empty; | |
373 | video_set_drvdata(&az->vdev, az); | |
374 | ||
375 | if (video_register_device(&az->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { | |
376 | v4l2_device_unregister(v4l2_dev); | |
377 | release_region(az->io, 2); | |
1da177e4 LT |
378 | return -EINVAL; |
379 | } | |
4286c6f6 | 380 | |
e697e12e | 381 | v4l2_info(v4l2_dev, "Aztech radio card driver v1.00/19990224 rkroll@exploits.org\n"); |
1da177e4 | 382 | /* mute card - prevents noisy bootups */ |
e697e12e | 383 | outb(0, az->io); |
1da177e4 LT |
384 | return 0; |
385 | } | |
386 | ||
e697e12e | 387 | static void __exit aztech_exit(void) |
1da177e4 | 388 | { |
e697e12e HV |
389 | struct aztech *az = &aztech_card; |
390 | ||
391 | video_unregister_device(&az->vdev); | |
392 | v4l2_device_unregister(&az->v4l2_dev); | |
393 | release_region(az->io, 2); | |
1da177e4 LT |
394 | } |
395 | ||
396 | module_init(aztech_init); | |
e697e12e | 397 | module_exit(aztech_exit); |