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FRV: Use generic show_interrupts()
[cris-mirror.git] / drivers / media / radio / radio-terratec.c
bloba32663917059c1cd4734247452c33444c02ad5d2
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/version.h> /* for KERNEL_VERSION MACRO */
33 #include <linux/io.h> /* outb, outb_p */
34 #include <media/v4l2-device.h>
35 #include <media/v4l2-ioctl.h>
36
37 MODULE_AUTHOR("R.OFFERMANNS & others");
38 MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card.");
39 MODULE_LICENSE("GPL");
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 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
53
54 static struct v4l2_queryctrl radio_qctrl[] = {
55 {
56 .id = V4L2_CID_AUDIO_MUTE,
57 .name = "Mute",
58 .minimum = 0,
59 .maximum = 1,
60 .default_value = 1,
61 .type = V4L2_CTRL_TYPE_BOOLEAN,
62 },{
63 .id = V4L2_CID_AUDIO_VOLUME,
64 .name = "Volume",
65 .minimum = 0,
66 .maximum = 0xff,
67 .step = 1,
68 .default_value = 0xff,
69 .type = V4L2_CTRL_TYPE_INTEGER,
70 }
71 };
72
73 #define WRT_DIS 0x00
74 #define CLK_OFF 0x00
75 #define IIC_DATA 0x01
76 #define IIC_CLK 0x02
77 #define DATA 0x04
78 #define CLK_ON 0x08
79 #define WRT_EN 0x10
80
81 struct terratec
82 {
83 struct v4l2_device v4l2_dev;
84 struct video_device vdev;
85 int io;
86 int curvol;
87 unsigned long curfreq;
88 int muted;
89 struct mutex lock;
90 };
91
92 static struct terratec terratec_card;
93
94 /* local things */
95
96 static void tt_write_vol(struct terratec *tt, int volume)
97 {
98 int i;
99
100 volume = volume + (volume * 32); /* change both channels */
101 mutex_lock(&tt->lock);
102 for (i = 0; i < 8; i++) {
103 if (volume & (0x80 >> i))
104 outb(0x80, tt->io + 1);
105 else
106 outb(0x00, tt->io + 1);
107 }
108 mutex_unlock(&tt->lock);
109 }
110
111
112
113 static void tt_mute(struct terratec *tt)
114 {
115 tt->muted = 1;
116 tt_write_vol(tt, 0);
117 }
118
119 static int tt_setvol(struct terratec *tt, int vol)
120 {
121 if (vol == tt->curvol) { /* requested volume = current */
122 if (tt->muted) { /* user is unmuting the card */
123 tt->muted = 0;
124 tt_write_vol(tt, vol); /* enable card */
125 }
126 return 0;
127 }
128
129 if (vol == 0) { /* volume = 0 means mute the card */
130 tt_write_vol(tt, 0); /* "turn off card" by setting vol to 0 */
131 tt->curvol = vol; /* track the volume state! */
132 return 0;
133 }
134
135 tt->muted = 0;
136 tt_write_vol(tt, vol);
137 tt->curvol = vol;
138 return 0;
139 }
140
141
142 /* this is the worst part in this driver */
143 /* many more or less strange things are going on here, but hey, it works :) */
144
145 static int tt_setfreq(struct terratec *tt, unsigned long freq1)
146 {
147 int freq;
148 int i;
149 int p;
150 int temp;
151 long rest;
152 unsigned char buffer[25]; /* we have to bit shift 25 registers */
153
154 mutex_lock(&tt->lock);
155
156 tt->curfreq = freq1;
157
158 freq = freq1 / 160; /* convert the freq. to a nice to handle value */
159 memset(buffer, 0, sizeof(buffer));
160
161 rest = freq * 10 + 10700; /* I once had understood what is going on here */
162 /* maybe some wise guy (friedhelm?) can comment this stuff */
163 i = 13;
164 p = 10;
165 temp = 102400;
166 while (rest != 0) {
167 if (rest % temp == rest)
168 buffer[i] = 0;
169 else {
170 buffer[i] = 1;
171 rest = rest - temp;
172 }
173 i--;
174 p--;
175 temp = temp / 2;
176 }
177
178 for (i = 24; i > -1; i--) { /* bit shift the values to the radiocard */
179 if (buffer[i] == 1) {
180 outb(WRT_EN | DATA, tt->io);
181 outb(WRT_EN | DATA | CLK_ON, tt->io);
182 outb(WRT_EN | DATA, tt->io);
183 } else {
184 outb(WRT_EN | 0x00, tt->io);
185 outb(WRT_EN | 0x00 | CLK_ON, tt->io);
186 }
187 }
188 outb(0x00, tt->io);
189
190 mutex_unlock(&tt->lock);
191
192 return 0;
193 }
194
195 static int tt_getsigstr(struct terratec *tt)
196 {
197 if (inb(tt->io) & 2) /* bit set = no signal present */
198 return 0;
199 return 1; /* signal present */
200 }
201
202 static int vidioc_querycap(struct file *file, void *priv,
203 struct v4l2_capability *v)
204 {
205 strlcpy(v->driver, "radio-terratec", sizeof(v->driver));
206 strlcpy(v->card, "ActiveRadio", sizeof(v->card));
207 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
208 v->version = RADIO_VERSION;
209 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
210 return 0;
211 }
212
213 static int vidioc_g_tuner(struct file *file, void *priv,
214 struct v4l2_tuner *v)
215 {
216 struct terratec *tt = video_drvdata(file);
217
218 if (v->index > 0)
219 return -EINVAL;
220
221 strlcpy(v->name, "FM", sizeof(v->name));
222 v->type = V4L2_TUNER_RADIO;
223 v->rangelow = 87 * 16000;
224 v->rangehigh = 108 * 16000;
225 v->rxsubchans = V4L2_TUNER_SUB_MONO;
226 v->capability = V4L2_TUNER_CAP_LOW;
227 v->audmode = V4L2_TUNER_MODE_MONO;
228 v->signal = 0xFFFF * tt_getsigstr(tt);
229 return 0;
230 }
231
232 static int vidioc_s_tuner(struct file *file, void *priv,
233 struct v4l2_tuner *v)
234 {
235 return v->index ? -EINVAL : 0;
236 }
237
238 static int vidioc_s_frequency(struct file *file, void *priv,
239 struct v4l2_frequency *f)
240 {
241 struct terratec *tt = video_drvdata(file);
242
243 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
244 return -EINVAL;
245 tt_setfreq(tt, f->frequency);
246 return 0;
247 }
248
249 static int vidioc_g_frequency(struct file *file, void *priv,
250 struct v4l2_frequency *f)
251 {
252 struct terratec *tt = video_drvdata(file);
253
254 if (f->tuner != 0)
255 return -EINVAL;
256 f->type = V4L2_TUNER_RADIO;
257 f->frequency = tt->curfreq;
258 return 0;
259 }
260
261 static int vidioc_queryctrl(struct file *file, void *priv,
262 struct v4l2_queryctrl *qc)
263 {
264 int i;
265
266 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
267 if (qc->id && qc->id == radio_qctrl[i].id) {
268 memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
269 return 0;
270 }
271 }
272 return -EINVAL;
273 }
274
275 static int vidioc_g_ctrl(struct file *file, void *priv,
276 struct v4l2_control *ctrl)
277 {
278 struct terratec *tt = video_drvdata(file);
279
280 switch (ctrl->id) {
281 case V4L2_CID_AUDIO_MUTE:
282 if (tt->muted)
283 ctrl->value = 1;
284 else
285 ctrl->value = 0;
286 return 0;
287 case V4L2_CID_AUDIO_VOLUME:
288 ctrl->value = tt->curvol * 6554;
289 return 0;
290 }
291 return -EINVAL;
292 }
293
294 static int vidioc_s_ctrl(struct file *file, void *priv,
295 struct v4l2_control *ctrl)
296 {
297 struct terratec *tt = video_drvdata(file);
298
299 switch (ctrl->id) {
300 case V4L2_CID_AUDIO_MUTE:
301 if (ctrl->value)
302 tt_mute(tt);
303 else
304 tt_setvol(tt,tt->curvol);
305 return 0;
306 case V4L2_CID_AUDIO_VOLUME:
307 tt_setvol(tt,ctrl->value);
308 return 0;
309 }
310 return -EINVAL;
311 }
312
313 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
314 {
315 *i = 0;
316 return 0;
317 }
318
319 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
320 {
321 return i ? -EINVAL : 0;
322 }
323
324 static int vidioc_g_audio(struct file *file, void *priv,
325 struct v4l2_audio *a)
326 {
327 a->index = 0;
328 strlcpy(a->name, "Radio", sizeof(a->name));
329 a->capability = V4L2_AUDCAP_STEREO;
330 return 0;
331 }
332
333 static int vidioc_s_audio(struct file *file, void *priv,
334 struct v4l2_audio *a)
335 {
336 return a->index ? -EINVAL : 0;
337 }
338
339 static const struct v4l2_file_operations terratec_fops = {
340 .owner = THIS_MODULE,
341 .unlocked_ioctl = video_ioctl2,
342 };
343
344 static const struct v4l2_ioctl_ops terratec_ioctl_ops = {
345 .vidioc_querycap = vidioc_querycap,
346 .vidioc_g_tuner = vidioc_g_tuner,
347 .vidioc_s_tuner = vidioc_s_tuner,
348 .vidioc_g_frequency = vidioc_g_frequency,
349 .vidioc_s_frequency = vidioc_s_frequency,
350 .vidioc_queryctrl = vidioc_queryctrl,
351 .vidioc_g_ctrl = vidioc_g_ctrl,
352 .vidioc_s_ctrl = vidioc_s_ctrl,
353 .vidioc_g_audio = vidioc_g_audio,
354 .vidioc_s_audio = vidioc_s_audio,
355 .vidioc_g_input = vidioc_g_input,
356 .vidioc_s_input = vidioc_s_input,
357 };
358
359 static int __init terratec_init(void)
360 {
361 struct terratec *tt = &terratec_card;
362 struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
363 int res;
364
365 strlcpy(v4l2_dev->name, "terratec", sizeof(v4l2_dev->name));
366 tt->io = io;
367 if (tt->io == -1) {
368 v4l2_err(v4l2_dev, "you must set an I/O address with io=0x590 or 0x591\n");
369 return -EINVAL;
370 }
371 if (!request_region(tt->io, 2, "terratec")) {
372 v4l2_err(v4l2_dev, "port 0x%x already in use\n", io);
373 return -EBUSY;
374 }
375
376 res = v4l2_device_register(NULL, v4l2_dev);
377 if (res < 0) {
378 release_region(tt->io, 2);
379 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
380 return res;
381 }
382
383 strlcpy(tt->vdev.name, v4l2_dev->name, sizeof(tt->vdev.name));
384 tt->vdev.v4l2_dev = v4l2_dev;
385 tt->vdev.fops = &terratec_fops;
386 tt->vdev.ioctl_ops = &terratec_ioctl_ops;
387 tt->vdev.release = video_device_release_empty;
388 video_set_drvdata(&tt->vdev, tt);
389
390 mutex_init(&tt->lock);
391
392 /* mute card - prevents noisy bootups */
393 tt_write_vol(tt, 0);
394
395 if (video_register_device(&tt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
396 v4l2_device_unregister(&tt->v4l2_dev);
397 release_region(tt->io, 2);
398 return -EINVAL;
399 }
400
401 v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver.\n");
402 return 0;
403 }
404
405 static void __exit terratec_exit(void)
406 {
407 struct terratec *tt = &terratec_card;
408 struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
409
410 video_unregister_device(&tt->vdev);
411 v4l2_device_unregister(&tt->v4l2_dev);
412 release_region(tt->io, 2);
413 v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver unloaded.\n");
414 }
415
416 module_init(terratec_init);
417 module_exit(terratec_exit);
418
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