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e1000e: cleanup whitespace and indentation
[linux-2.6.git] / drivers / media / radio / radio-terratec.c
blobf2ed9cc3cf3b7d6fcdd462f5ee82ff6dd414558e
1 /* Terratec ActiveRadio ISA Standalone card driver for Linux radio support
2 * (c) 1999 R. Offermanns (rolf@offermanns.de)
3 * based on the aimslab radio driver from M. Kirkwood
4 * many thanks to Michael Becker and Friedhelm Birth (from TerraTec)
5 *
6 *
7 * History:
8 * 1999-05-21 First preview release
9 *
10 * Notes on the hardware:
11 * There are two "main" chips on the card:
12 * - Philips OM5610 (http://www-us.semiconductors.philips.com/acrobat/datasheets/OM5610_2.pdf)
13 * - Philips SAA6588 (http://www-us.semiconductors.philips.com/acrobat/datasheets/SAA6588_1.pdf)
14 * (you can get the datasheet at the above links)
15 *
16 * Frequency control is done digitally -- ie out(port,encodefreq(95.8));
17 * Volume Control is done digitally
18 *
19 * there is a I2C controlled RDS decoder (SAA6588) onboard, which i would like to support someday
20 * (as soon i have understand how to get started :)
21 * If you can help me out with that, please contact me!!
22 *
23 *
24 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
25 */
26
27 #include <linux/module.h> /* Modules */
28 #include <linux/init.h> /* Initdata */
29 #include <linux/ioport.h> /* request_region */
30 #include <linux/videodev2.h> /* kernel radio structs */
31 #include <linux/mutex.h>
32 #include <linux/io.h> /* outb, outb_p */
33 #include <media/v4l2-device.h>
34 #include <media/v4l2-ioctl.h>
35
36 MODULE_AUTHOR("R.OFFERMANNS & others");
37 MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card.");
38 MODULE_LICENSE("GPL");
39 MODULE_VERSION("0.0.3");
40
41 #ifndef CONFIG_RADIO_TERRATEC_PORT
42 #define CONFIG_RADIO_TERRATEC_PORT 0x590
43 #endif
44
45 static int io = CONFIG_RADIO_TERRATEC_PORT;
46 static int radio_nr = -1;
47
48 module_param(io, int, 0);
49 MODULE_PARM_DESC(io, "I/O address of the TerraTec ActiveRadio card (0x590 or 0x591)");
50 module_param(radio_nr, int, 0);
51
52 static struct v4l2_queryctrl radio_qctrl[] = {
53 {
54 .id = V4L2_CID_AUDIO_MUTE,
55 .name = "Mute",
56 .minimum = 0,
57 .maximum = 1,
58 .default_value = 1,
59 .type = V4L2_CTRL_TYPE_BOOLEAN,
60 },{
61 .id = V4L2_CID_AUDIO_VOLUME,
62 .name = "Volume",
63 .minimum = 0,
64 .maximum = 0xff,
65 .step = 1,
66 .default_value = 0xff,
67 .type = V4L2_CTRL_TYPE_INTEGER,
68 }
69 };
70
71 #define WRT_DIS 0x00
72 #define CLK_OFF 0x00
73 #define IIC_DATA 0x01
74 #define IIC_CLK 0x02
75 #define DATA 0x04
76 #define CLK_ON 0x08
77 #define WRT_EN 0x10
78
79 struct terratec
80 {
81 struct v4l2_device v4l2_dev;
82 struct video_device vdev;
83 int io;
84 int curvol;
85 unsigned long curfreq;
86 int muted;
87 struct mutex lock;
88 };
89
90 static struct terratec terratec_card;
91
92 /* local things */
93
94 static void tt_write_vol(struct terratec *tt, int volume)
95 {
96 int i;
97
98 volume = volume + (volume * 32); /* change both channels */
99 mutex_lock(&tt->lock);
100 for (i = 0; i < 8; i++) {
101 if (volume & (0x80 >> i))
102 outb(0x80, tt->io + 1);
103 else
104 outb(0x00, tt->io + 1);
105 }
106 mutex_unlock(&tt->lock);
107 }
108
109
110
111 static void tt_mute(struct terratec *tt)
112 {
113 tt->muted = 1;
114 tt_write_vol(tt, 0);
115 }
116
117 static int tt_setvol(struct terratec *tt, int vol)
118 {
119 if (vol == tt->curvol) { /* requested volume = current */
120 if (tt->muted) { /* user is unmuting the card */
121 tt->muted = 0;
122 tt_write_vol(tt, vol); /* enable card */
123 }
124 return 0;
125 }
126
127 if (vol == 0) { /* volume = 0 means mute the card */
128 tt_write_vol(tt, 0); /* "turn off card" by setting vol to 0 */
129 tt->curvol = vol; /* track the volume state! */
130 return 0;
131 }
132
133 tt->muted = 0;
134 tt_write_vol(tt, vol);
135 tt->curvol = vol;
136 return 0;
137 }
138
139
140 /* this is the worst part in this driver */
141 /* many more or less strange things are going on here, but hey, it works :) */
142
143 static int tt_setfreq(struct terratec *tt, unsigned long freq1)
144 {
145 int freq;
146 int i;
147 int p;
148 int temp;
149 long rest;
150 unsigned char buffer[25]; /* we have to bit shift 25 registers */
151
152 mutex_lock(&tt->lock);
153
154 tt->curfreq = freq1;
155
156 freq = freq1 / 160; /* convert the freq. to a nice to handle value */
157 memset(buffer, 0, sizeof(buffer));
158
159 rest = freq * 10 + 10700; /* I once had understood what is going on here */
160 /* maybe some wise guy (friedhelm?) can comment this stuff */
161 i = 13;
162 p = 10;
163 temp = 102400;
164 while (rest != 0) {
165 if (rest % temp == rest)
166 buffer[i] = 0;
167 else {
168 buffer[i] = 1;
169 rest = rest - temp;
170 }
171 i--;
172 p--;
173 temp = temp / 2;
174 }
175
176 for (i = 24; i > -1; i--) { /* bit shift the values to the radiocard */
177 if (buffer[i] == 1) {
178 outb(WRT_EN | DATA, tt->io);
179 outb(WRT_EN | DATA | CLK_ON, tt->io);
180 outb(WRT_EN | DATA, tt->io);
181 } else {
182 outb(WRT_EN | 0x00, tt->io);
183 outb(WRT_EN | 0x00 | CLK_ON, tt->io);
184 }
185 }
186 outb(0x00, tt->io);
187
188 mutex_unlock(&tt->lock);
189
190 return 0;
191 }
192
193 static int tt_getsigstr(struct terratec *tt)
194 {
195 if (inb(tt->io) & 2) /* bit set = no signal present */
196 return 0;
197 return 1; /* signal present */
198 }
199
200 static int vidioc_querycap(struct file *file, void *priv,
201 struct v4l2_capability *v)
202 {
203 strlcpy(v->driver, "radio-terratec", sizeof(v->driver));
204 strlcpy(v->card, "ActiveRadio", sizeof(v->card));
205 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
206 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
207 return 0;
208 }
209
210 static int vidioc_g_tuner(struct file *file, void *priv,
211 struct v4l2_tuner *v)
212 {
213 struct terratec *tt = video_drvdata(file);
214
215 if (v->index > 0)
216 return -EINVAL;
217
218 strlcpy(v->name, "FM", sizeof(v->name));
219 v->type = V4L2_TUNER_RADIO;
220 v->rangelow = 87 * 16000;
221 v->rangehigh = 108 * 16000;
222 v->rxsubchans = V4L2_TUNER_SUB_MONO;
223 v->capability = V4L2_TUNER_CAP_LOW;
224 v->audmode = V4L2_TUNER_MODE_MONO;
225 v->signal = 0xFFFF * tt_getsigstr(tt);
226 return 0;
227 }
228
229 static int vidioc_s_tuner(struct file *file, void *priv,
230 struct v4l2_tuner *v)
231 {
232 return v->index ? -EINVAL : 0;
233 }
234
235 static int vidioc_s_frequency(struct file *file, void *priv,
236 struct v4l2_frequency *f)
237 {
238 struct terratec *tt = video_drvdata(file);
239
240 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
241 return -EINVAL;
242 tt_setfreq(tt, f->frequency);
243 return 0;
244 }
245
246 static int vidioc_g_frequency(struct file *file, void *priv,
247 struct v4l2_frequency *f)
248 {
249 struct terratec *tt = video_drvdata(file);
250
251 if (f->tuner != 0)
252 return -EINVAL;
253 f->type = V4L2_TUNER_RADIO;
254 f->frequency = tt->curfreq;
255 return 0;
256 }
257
258 static int vidioc_queryctrl(struct file *file, void *priv,
259 struct v4l2_queryctrl *qc)
260 {
261 int i;
262
263 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
264 if (qc->id && qc->id == radio_qctrl[i].id) {
265 memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
266 return 0;
267 }
268 }
269 return -EINVAL;
270 }
271
272 static int vidioc_g_ctrl(struct file *file, void *priv,
273 struct v4l2_control *ctrl)
274 {
275 struct terratec *tt = video_drvdata(file);
276
277 switch (ctrl->id) {
278 case V4L2_CID_AUDIO_MUTE:
279 if (tt->muted)
280 ctrl->value = 1;
281 else
282 ctrl->value = 0;
283 return 0;
284 case V4L2_CID_AUDIO_VOLUME:
285 ctrl->value = tt->curvol * 6554;
286 return 0;
287 }
288 return -EINVAL;
289 }
290
291 static int vidioc_s_ctrl(struct file *file, void *priv,
292 struct v4l2_control *ctrl)
293 {
294 struct terratec *tt = video_drvdata(file);
295
296 switch (ctrl->id) {
297 case V4L2_CID_AUDIO_MUTE:
298 if (ctrl->value)
299 tt_mute(tt);
300 else
301 tt_setvol(tt,tt->curvol);
302 return 0;
303 case V4L2_CID_AUDIO_VOLUME:
304 tt_setvol(tt,ctrl->value);
305 return 0;
306 }
307 return -EINVAL;
308 }
309
310 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
311 {
312 *i = 0;
313 return 0;
314 }
315
316 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
317 {
318 return i ? -EINVAL : 0;
319 }
320
321 static int vidioc_g_audio(struct file *file, void *priv,
322 struct v4l2_audio *a)
323 {
324 a->index = 0;
325 strlcpy(a->name, "Radio", sizeof(a->name));
326 a->capability = V4L2_AUDCAP_STEREO;
327 return 0;
328 }
329
330 static int vidioc_s_audio(struct file *file, void *priv,
331 struct v4l2_audio *a)
332 {
333 return a->index ? -EINVAL : 0;
334 }
335
336 static const struct v4l2_file_operations terratec_fops = {
337 .owner = THIS_MODULE,
338 .unlocked_ioctl = video_ioctl2,
339 };
340
341 static const struct v4l2_ioctl_ops terratec_ioctl_ops = {
342 .vidioc_querycap = vidioc_querycap,
343 .vidioc_g_tuner = vidioc_g_tuner,
344 .vidioc_s_tuner = vidioc_s_tuner,
345 .vidioc_g_frequency = vidioc_g_frequency,
346 .vidioc_s_frequency = vidioc_s_frequency,
347 .vidioc_queryctrl = vidioc_queryctrl,
348 .vidioc_g_ctrl = vidioc_g_ctrl,
349 .vidioc_s_ctrl = vidioc_s_ctrl,
350 .vidioc_g_audio = vidioc_g_audio,
351 .vidioc_s_audio = vidioc_s_audio,
352 .vidioc_g_input = vidioc_g_input,
353 .vidioc_s_input = vidioc_s_input,
354 };
355
356 static int __init terratec_init(void)
357 {
358 struct terratec *tt = &terratec_card;
359 struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
360 int res;
361
362 strlcpy(v4l2_dev->name, "terratec", sizeof(v4l2_dev->name));
363 tt->io = io;
364 if (tt->io == -1) {
365 v4l2_err(v4l2_dev, "you must set an I/O address with io=0x590 or 0x591\n");
366 return -EINVAL;
367 }
368 if (!request_region(tt->io, 2, "terratec")) {
369 v4l2_err(v4l2_dev, "port 0x%x already in use\n", io);
370 return -EBUSY;
371 }
372
373 res = v4l2_device_register(NULL, v4l2_dev);
374 if (res < 0) {
375 release_region(tt->io, 2);
376 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
377 return res;
378 }
379
380 strlcpy(tt->vdev.name, v4l2_dev->name, sizeof(tt->vdev.name));
381 tt->vdev.v4l2_dev = v4l2_dev;
382 tt->vdev.fops = &terratec_fops;
383 tt->vdev.ioctl_ops = &terratec_ioctl_ops;
384 tt->vdev.release = video_device_release_empty;
385 video_set_drvdata(&tt->vdev, tt);
386
387 mutex_init(&tt->lock);
388
389 /* mute card - prevents noisy bootups */
390 tt_write_vol(tt, 0);
391
392 if (video_register_device(&tt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
393 v4l2_device_unregister(&tt->v4l2_dev);
394 release_region(tt->io, 2);
395 return -EINVAL;
396 }
397
398 v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver.\n");
399 return 0;
400 }
401
402 static void __exit terratec_exit(void)
403 {
404 struct terratec *tt = &terratec_card;
405 struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
406
407 video_unregister_device(&tt->vdev);
408 v4l2_device_unregister(&tt->v4l2_dev);
409 release_region(tt->io, 2);
410 v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver unloaded.\n");
411 }
412
413 module_init(terratec_init);
414 module_exit(terratec_exit);
415
Linus' kernel tree