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32#include <linux/module.h>
33#include <linux/init.h>
34#include <linux/ioport.h>
35#include <linux/delay.h>
36#include <linux/videodev2.h>
37#include <linux/mutex.h>
38#include <linux/version.h>
39#include <linux/io.h>
40#include <media/v4l2-device.h>
41#include <media/v4l2-ioctl.h>
42
43MODULE_AUTHOR("C.van Schaik");
44MODULE_DESCRIPTION("A driver for the Zoltrix Radio Plus.");
45MODULE_LICENSE("GPL");
46
47#ifndef CONFIG_RADIO_ZOLTRIX_PORT
48#define CONFIG_RADIO_ZOLTRIX_PORT -1
49#endif
50
51static int io = CONFIG_RADIO_ZOLTRIX_PORT;
52static int radio_nr = -1;
53
54module_param(io, int, 0);
55MODULE_PARM_DESC(io, "I/O address of the Zoltrix Radio Plus (0x20c or 0x30c)");
56module_param(radio_nr, int, 0);
57
58#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
59
60struct zoltrix {
61 struct v4l2_device v4l2_dev;
62 struct video_device vdev;
63 int io;
64 int curvol;
65 unsigned long curfreq;
66 int muted;
67 unsigned int stereo;
68 struct mutex lock;
69};
70
71static struct zoltrix zoltrix_card;
72
73static int zol_setvol(struct zoltrix *zol, int vol)
74{
75 zol->curvol = vol;
76 if (zol->muted)
77 return 0;
78
79 mutex_lock(&zol->lock);
80 if (vol == 0) {
81 outb(0, zol->io);
82 outb(0, zol->io);
83 inb(zol->io + 3);
84 mutex_unlock(&zol->lock);
85 return 0;
86 }
87
88 outb(zol->curvol-1, zol->io);
89 msleep(10);
90 inb(zol->io + 2);
91 mutex_unlock(&zol->lock);
92 return 0;
93}
94
95static void zol_mute(struct zoltrix *zol)
96{
97 zol->muted = 1;
98 mutex_lock(&zol->lock);
99 outb(0, zol->io);
100 outb(0, zol->io);
101 inb(zol->io + 3);
102 mutex_unlock(&zol->lock);
103}
104
105static void zol_unmute(struct zoltrix *zol)
106{
107 zol->muted = 0;
108 zol_setvol(zol, zol->curvol);
109}
110
111static int zol_setfreq(struct zoltrix *zol, unsigned long freq)
112{
113
114 struct v4l2_device *v4l2_dev = &zol->v4l2_dev;
115 unsigned long long bitmask, f, m;
116 unsigned int stereo = zol->stereo;
117 int i;
118
119 if (freq == 0) {
120 v4l2_warn(v4l2_dev, "cannot set a frequency of 0.\n");
121 return -EINVAL;
122 }
123
124 m = (freq / 160 - 8800) * 2;
125 f = (unsigned long long)m + 0x4d1c;
126
127 bitmask = 0xc480402c10080000ull;
128 i = 45;
129
130 mutex_lock(&zol->lock);
131
132 zol->curfreq = freq;
133
134 outb(0, zol->io);
135 outb(0, zol->io);
136 inb(zol->io + 3);
137
138 outb(0x40, zol->io);
139 outb(0xc0, zol->io);
140
141 bitmask = (bitmask ^ ((f & 0xff) << 47) ^ ((f & 0xff00) << 30) ^ (stereo << 31));
142 while (i--) {
143 if ((bitmask & 0x8000000000000000ull) != 0) {
144 outb(0x80, zol->io);
145 udelay(50);
146 outb(0x00, zol->io);
147 udelay(50);
148 outb(0x80, zol->io);
149 udelay(50);
150 } else {
151 outb(0xc0, zol->io);
152 udelay(50);
153 outb(0x40, zol->io);
154 udelay(50);
155 outb(0xc0, zol->io);
156 udelay(50);
157 }
158 bitmask *= 2;
159 }
160
161 outb(0x80, zol->io);
162 outb(0xc0, zol->io);
163 outb(0x40, zol->io);
164 udelay(1000);
165 inb(zol->io + 2);
166
167 udelay(1000);
168
169 if (zol->muted) {
170 outb(0, zol->io);
171 outb(0, zol->io);
172 inb(zol->io + 3);
173 udelay(1000);
174 }
175
176 mutex_unlock(&zol->lock);
177
178 if (!zol->muted)
179 zol_setvol(zol, zol->curvol);
180 return 0;
181}
182
183
184static int zol_getsigstr(struct zoltrix *zol)
185{
186 int a, b;
187
188 mutex_lock(&zol->lock);
189 outb(0x00, zol->io);
190 outb(zol->curvol, zol->io);
191 msleep(20);
192
193 a = inb(zol->io);
194 msleep(10);
195 b = inb(zol->io);
196
197 mutex_unlock(&zol->lock);
198
199 if (a != b)
200 return 0;
201
202
203 return a == 0xcf || a == 0xdf || a == 0xef;
204}
205
206static int zol_is_stereo(struct zoltrix *zol)
207{
208 int x1, x2;
209
210 mutex_lock(&zol->lock);
211
212 outb(0x00, zol->io);
213 outb(zol->curvol, zol->io);
214 msleep(20);
215
216 x1 = inb(zol->io);
217 msleep(10);
218 x2 = inb(zol->io);
219
220 mutex_unlock(&zol->lock);
221
222 return x1 == x2 && x1 == 0xcf;
223}
224
225static int vidioc_querycap(struct file *file, void *priv,
226 struct v4l2_capability *v)
227{
228 strlcpy(v->driver, "radio-zoltrix", sizeof(v->driver));
229 strlcpy(v->card, "Zoltrix Radio", sizeof(v->card));
230 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
231 v->version = RADIO_VERSION;
232 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
233 return 0;
234}
235
236static int vidioc_g_tuner(struct file *file, void *priv,
237 struct v4l2_tuner *v)
238{
239 struct zoltrix *zol = video_drvdata(file);
240
241 if (v->index > 0)
242 return -EINVAL;
243
244 strlcpy(v->name, "FM", sizeof(v->name));
245 v->type = V4L2_TUNER_RADIO;
246 v->rangelow = 88 * 16000;
247 v->rangehigh = 108 * 16000;
248 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
249 v->capability = V4L2_TUNER_CAP_LOW;
250 if (zol_is_stereo(zol))
251 v->audmode = V4L2_TUNER_MODE_STEREO;
252 else
253 v->audmode = V4L2_TUNER_MODE_MONO;
254 v->signal = 0xFFFF * zol_getsigstr(zol);
255 return 0;
256}
257
258static int vidioc_s_tuner(struct file *file, void *priv,
259 struct v4l2_tuner *v)
260{
261 return v->index ? -EINVAL : 0;
262}
263
264static int vidioc_s_frequency(struct file *file, void *priv,
265 struct v4l2_frequency *f)
266{
267 struct zoltrix *zol = video_drvdata(file);
268
269 if (zol_setfreq(zol, f->frequency) != 0)
270 return -EINVAL;
271 return 0;
272}
273
274static int vidioc_g_frequency(struct file *file, void *priv,
275 struct v4l2_frequency *f)
276{
277 struct zoltrix *zol = video_drvdata(file);
278
279 f->type = V4L2_TUNER_RADIO;
280 f->frequency = zol->curfreq;
281 return 0;
282}
283
284static int vidioc_queryctrl(struct file *file, void *priv,
285 struct v4l2_queryctrl *qc)
286{
287 switch (qc->id) {
288 case V4L2_CID_AUDIO_MUTE:
289 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
290 case V4L2_CID_AUDIO_VOLUME:
291 return v4l2_ctrl_query_fill(qc, 0, 65535, 4096, 65535);
292 }
293 return -EINVAL;
294}
295
296static int vidioc_g_ctrl(struct file *file, void *priv,
297 struct v4l2_control *ctrl)
298{
299 struct zoltrix *zol = video_drvdata(file);
300
301 switch (ctrl->id) {
302 case V4L2_CID_AUDIO_MUTE:
303 ctrl->value = zol->muted;
304 return 0;
305 case V4L2_CID_AUDIO_VOLUME:
306 ctrl->value = zol->curvol * 4096;
307 return 0;
308 }
309 return -EINVAL;
310}
311
312static int vidioc_s_ctrl(struct file *file, void *priv,
313 struct v4l2_control *ctrl)
314{
315 struct zoltrix *zol = video_drvdata(file);
316
317 switch (ctrl->id) {
318 case V4L2_CID_AUDIO_MUTE:
319 if (ctrl->value)
320 zol_mute(zol);
321 else {
322 zol_unmute(zol);
323 zol_setvol(zol, zol->curvol);
324 }
325 return 0;
326 case V4L2_CID_AUDIO_VOLUME:
327 zol_setvol(zol, ctrl->value / 4096);
328 return 0;
329 }
330 zol->stereo = 1;
331 if (zol_setfreq(zol, zol->curfreq) != 0)
332 return -EINVAL;
333#if 0
334
335 if (v->mode & VIDEO_SOUND_STEREO) {
336 zol->stereo = 1;
337 zol_setfreq(zol, zol->curfreq);
338 }
339 if (v->mode & VIDEO_SOUND_MONO) {
340 zol->stereo = 0;
341 zol_setfreq(zol, zol->curfreq);
342 }
343#endif
344 return -EINVAL;
345}
346
347static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
348{
349 *i = 0;
350 return 0;
351}
352
353static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
354{
355 return i ? -EINVAL : 0;
356}
357
358static int vidioc_g_audio(struct file *file, void *priv,
359 struct v4l2_audio *a)
360{
361 a->index = 0;
362 strlcpy(a->name, "Radio", sizeof(a->name));
363 a->capability = V4L2_AUDCAP_STEREO;
364 return 0;
365}
366
367static int vidioc_s_audio(struct file *file, void *priv,
368 struct v4l2_audio *a)
369{
370 return a->index ? -EINVAL : 0;
371}
372
373static const struct v4l2_file_operations zoltrix_fops =
374{
375 .owner = THIS_MODULE,
376 .ioctl = video_ioctl2,
377};
378
379static const struct v4l2_ioctl_ops zoltrix_ioctl_ops = {
380 .vidioc_querycap = vidioc_querycap,
381 .vidioc_g_tuner = vidioc_g_tuner,
382 .vidioc_s_tuner = vidioc_s_tuner,
383 .vidioc_g_audio = vidioc_g_audio,
384 .vidioc_s_audio = vidioc_s_audio,
385 .vidioc_g_input = vidioc_g_input,
386 .vidioc_s_input = vidioc_s_input,
387 .vidioc_g_frequency = vidioc_g_frequency,
388 .vidioc_s_frequency = vidioc_s_frequency,
389 .vidioc_queryctrl = vidioc_queryctrl,
390 .vidioc_g_ctrl = vidioc_g_ctrl,
391 .vidioc_s_ctrl = vidioc_s_ctrl,
392};
393
394static int __init zoltrix_init(void)
395{
396 struct zoltrix *zol = &zoltrix_card;
397 struct v4l2_device *v4l2_dev = &zol->v4l2_dev;
398 int res;
399
400 strlcpy(v4l2_dev->name, "zoltrix", sizeof(v4l2_dev->name));
401 zol->io = io;
402 if (zol->io == -1) {
403 v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or 0x30c\n");
404 return -EINVAL;
405 }
406 if (zol->io != 0x20c && zol->io != 0x30c) {
407 v4l2_err(v4l2_dev, "invalid port, try 0x20c or 0x30c\n");
408 return -ENXIO;
409 }
410
411 if (!request_region(zol->io, 2, "zoltrix")) {
412 v4l2_err(v4l2_dev, "port 0x%x already in use\n", zol->io);
413 return -EBUSY;
414 }
415
416 res = v4l2_device_register(NULL, v4l2_dev);
417 if (res < 0) {
418 release_region(zol->io, 2);
419 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
420 return res;
421 }
422
423 strlcpy(zol->vdev.name, v4l2_dev->name, sizeof(zol->vdev.name));
424 zol->vdev.v4l2_dev = v4l2_dev;
425 zol->vdev.fops = &zoltrix_fops;
426 zol->vdev.ioctl_ops = &zoltrix_ioctl_ops;
427 zol->vdev.release = video_device_release_empty;
428 video_set_drvdata(&zol->vdev, zol);
429
430 if (video_register_device(&zol->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
431 v4l2_device_unregister(v4l2_dev);
432 release_region(zol->io, 2);
433 return -EINVAL;
434 }
435 v4l2_info(v4l2_dev, "Zoltrix Radio Plus card driver.\n");
436
437 mutex_init(&zol->lock);
438
439
440
441
442
443 outb(0, zol->io);
444 outb(0, zol->io);
445 msleep(20);
446 inb(zol->io + 3);
447
448 zol->curvol = 0;
449 zol->stereo = 1;
450
451 return 0;
452}
453
454static void __exit zoltrix_exit(void)
455{
456 struct zoltrix *zol = &zoltrix_card;
457
458 video_unregister_device(&zol->vdev);
459 v4l2_device_unregister(&zol->v4l2_dev);
460 release_region(zol->io, 2);
461}
462
463module_init(zoltrix_init);
464module_exit(zoltrix_exit);
465
466
