1 /* radio-trust.c - Trust FM Radio card driver for Linux 2.2
2 * by Eric Lammerts <eric@scintilla.utwente.nl>
4 * Based on radio-aztech.c. Original notes:
6 * Adapted to support the Video for Linux API by
7 * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:
11 * Jason Lewis (jlewis@twilight.vtc.vsc.edu)
12 * Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
13 * William McGrath (wmcgrath@twilight.vtc.vsc.edu)
15 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/ioport.h>
22 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
23 #include <linux/videodev2.h>
25 #include <linux/uaccess.h>
26 #include <media/v4l2-device.h>
27 #include <media/v4l2-ioctl.h>
29 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
30 MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
31 MODULE_LICENSE("GPL");
33 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
35 #ifndef CONFIG_RADIO_TRUST_PORT
36 #define CONFIG_RADIO_TRUST_PORT -1
39 static int io = CONFIG_RADIO_TRUST_PORT;
40 static int radio_nr = -1;
42 module_param(io, int, 0);
43 MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
44 module_param(radio_nr, int, 0);
46 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
49 struct v4l2_device v4l2_dev;
50 struct video_device vdev;
57 unsigned long curfreq;
63 static struct trust trust_card;
66 #define TDA7318_ADDR 0x88
67 #define TSA6060T_ADDR 0xc4
69 #define TR_DELAY do { inb(tr->io); inb(tr->io); inb(tr->io); } while (0)
70 #define TR_SET_SCL outb(tr->ioval |= 2, tr->io)
71 #define TR_CLR_SCL outb(tr->ioval &= 0xfd, tr->io)
72 #define TR_SET_SDA outb(tr->ioval |= 1, tr->io)
73 #define TR_CLR_SDA outb(tr->ioval &= 0xfe, tr->io)
75 static void write_i2c(struct trust *tr, int n, ...)
77 unsigned char val, mask;
91 val = va_arg(args, unsigned);
92 for(mask = 0x80; mask; mask >>= 1) {
102 /* acknowledge bit */
121 static void tr_setvol(struct trust *tr, __u16 vol)
123 mutex_lock(&tr->lock);
124 tr->curvol = vol / 2048;
125 write_i2c(tr, 2, TDA7318_ADDR, tr->curvol ^ 0x1f);
126 mutex_unlock(&tr->lock);
129 static int basstreble2chip[15] = {
130 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
133 static void tr_setbass(struct trust *tr, __u16 bass)
135 mutex_lock(&tr->lock);
136 tr->curbass = bass / 4370;
137 write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[tr->curbass]);
138 mutex_unlock(&tr->lock);
141 static void tr_settreble(struct trust *tr, __u16 treble)
143 mutex_lock(&tr->lock);
144 tr->curtreble = treble / 4370;
145 write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[tr->curtreble]);
146 mutex_unlock(&tr->lock);
149 static void tr_setstereo(struct trust *tr, int stereo)
151 mutex_lock(&tr->lock);
152 tr->curstereo = !!stereo;
153 tr->ioval = (tr->ioval & 0xfb) | (!tr->curstereo << 2);
154 outb(tr->ioval, tr->io);
155 mutex_unlock(&tr->lock);
158 static void tr_setmute(struct trust *tr, int mute)
160 mutex_lock(&tr->lock);
161 tr->curmute = !!mute;
162 tr->ioval = (tr->ioval & 0xf7) | (tr->curmute << 3);
163 outb(tr->ioval, tr->io);
164 mutex_unlock(&tr->lock);
167 static int tr_getsigstr(struct trust *tr)
171 mutex_lock(&tr->lock);
172 for (i = 0, v = 0; i < 100; i++)
174 mutex_unlock(&tr->lock);
175 return (v & 1) ? 0 : 0xffff;
178 static int tr_getstereo(struct trust *tr)
180 /* don't know how to determine it, just return the setting */
181 return tr->curstereo;
184 static void tr_setfreq(struct trust *tr, unsigned long f)
186 mutex_lock(&tr->lock);
188 f /= 160; /* Convert to 10 kHz units */
189 f += 1070; /* Add 10.7 MHz IF */
190 write_i2c(tr, 5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
191 mutex_unlock(&tr->lock);
194 static int vidioc_querycap(struct file *file, void *priv,
195 struct v4l2_capability *v)
197 strlcpy(v->driver, "radio-trust", sizeof(v->driver));
198 strlcpy(v->card, "Trust FM Radio", sizeof(v->card));
199 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
200 v->version = RADIO_VERSION;
201 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
205 static int vidioc_g_tuner(struct file *file, void *priv,
206 struct v4l2_tuner *v)
208 struct trust *tr = video_drvdata(file);
213 strlcpy(v->name, "FM", sizeof(v->name));
214 v->type = V4L2_TUNER_RADIO;
215 v->rangelow = 87.5 * 16000;
216 v->rangehigh = 108 * 16000;
217 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
218 v->capability = V4L2_TUNER_CAP_LOW;
219 if (tr_getstereo(tr))
220 v->audmode = V4L2_TUNER_MODE_STEREO;
222 v->audmode = V4L2_TUNER_MODE_MONO;
223 v->signal = tr_getsigstr(tr);
227 static int vidioc_s_tuner(struct file *file, void *priv,
228 struct v4l2_tuner *v)
230 struct trust *tr = video_drvdata(file);
234 tr_setstereo(tr, v->audmode == V4L2_TUNER_MODE_STEREO);
238 static int vidioc_s_frequency(struct file *file, void *priv,
239 struct v4l2_frequency *f)
241 struct trust *tr = video_drvdata(file);
243 tr_setfreq(tr, f->frequency);
247 static int vidioc_g_frequency(struct file *file, void *priv,
248 struct v4l2_frequency *f)
250 struct trust *tr = video_drvdata(file);
252 f->type = V4L2_TUNER_RADIO;
253 f->frequency = tr->curfreq;
257 static int vidioc_queryctrl(struct file *file, void *priv,
258 struct v4l2_queryctrl *qc)
261 case V4L2_CID_AUDIO_MUTE:
262 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
263 case V4L2_CID_AUDIO_VOLUME:
264 return v4l2_ctrl_query_fill(qc, 0, 65535, 2048, 65535);
265 case V4L2_CID_AUDIO_BASS:
266 case V4L2_CID_AUDIO_TREBLE:
267 return v4l2_ctrl_query_fill(qc, 0, 65535, 4370, 32768);
272 static int vidioc_g_ctrl(struct file *file, void *priv,
273 struct v4l2_control *ctrl)
275 struct trust *tr = video_drvdata(file);
278 case V4L2_CID_AUDIO_MUTE:
279 ctrl->value = tr->curmute;
281 case V4L2_CID_AUDIO_VOLUME:
282 ctrl->value = tr->curvol * 2048;
284 case V4L2_CID_AUDIO_BASS:
285 ctrl->value = tr->curbass * 4370;
287 case V4L2_CID_AUDIO_TREBLE:
288 ctrl->value = tr->curtreble * 4370;
294 static int vidioc_s_ctrl(struct file *file, void *priv,
295 struct v4l2_control *ctrl)
297 struct trust *tr = video_drvdata(file);
300 case V4L2_CID_AUDIO_MUTE:
301 tr_setmute(tr, ctrl->value);
303 case V4L2_CID_AUDIO_VOLUME:
304 tr_setvol(tr, ctrl->value);
306 case V4L2_CID_AUDIO_BASS:
307 tr_setbass(tr, ctrl->value);
309 case V4L2_CID_AUDIO_TREBLE:
310 tr_settreble(tr, ctrl->value);
316 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
322 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
324 return i ? -EINVAL : 0;
327 static int vidioc_g_audio(struct file *file, void *priv,
328 struct v4l2_audio *a)
331 strlcpy(a->name, "Radio", sizeof(a->name));
332 a->capability = V4L2_AUDCAP_STEREO;
336 static int vidioc_s_audio(struct file *file, void *priv,
337 struct v4l2_audio *a)
339 return a->index ? -EINVAL : 0;
342 static int trust_open(struct file *file)
347 static int trust_release(struct file *file)
352 static const struct v4l2_file_operations trust_fops = {
353 .owner = THIS_MODULE,
355 .release = trust_release,
356 .ioctl = video_ioctl2,
359 static const struct v4l2_ioctl_ops trust_ioctl_ops = {
360 .vidioc_querycap = vidioc_querycap,
361 .vidioc_g_tuner = vidioc_g_tuner,
362 .vidioc_s_tuner = vidioc_s_tuner,
363 .vidioc_g_frequency = vidioc_g_frequency,
364 .vidioc_s_frequency = vidioc_s_frequency,
365 .vidioc_queryctrl = vidioc_queryctrl,
366 .vidioc_g_ctrl = vidioc_g_ctrl,
367 .vidioc_s_ctrl = vidioc_s_ctrl,
368 .vidioc_g_audio = vidioc_g_audio,
369 .vidioc_s_audio = vidioc_s_audio,
370 .vidioc_g_input = vidioc_g_input,
371 .vidioc_s_input = vidioc_s_input,
374 static int __init trust_init(void)
376 struct trust *tr = &trust_card;
377 struct v4l2_device *v4l2_dev = &tr->v4l2_dev;
380 strlcpy(v4l2_dev->name, "trust", sizeof(v4l2_dev->name));
383 mutex_init(&tr->lock);
386 v4l2_err(v4l2_dev, "You must set an I/O address with io=0x???\n");
389 if (!request_region(tr->io, 2, "Trust FM Radio")) {
390 v4l2_err(v4l2_dev, "port 0x%x already in use\n", tr->io);
394 res = v4l2_device_register(NULL, v4l2_dev);
396 release_region(tr->io, 2);
397 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
401 strlcpy(tr->vdev.name, v4l2_dev->name, sizeof(tr->vdev.name));
402 tr->vdev.v4l2_dev = v4l2_dev;
403 tr->vdev.fops = &trust_fops;
404 tr->vdev.ioctl_ops = &trust_ioctl_ops;
405 tr->vdev.release = video_device_release_empty;
406 video_set_drvdata(&tr->vdev, tr);
408 if (video_register_device(&tr->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
409 v4l2_device_unregister(v4l2_dev);
410 release_region(tr->io, 2);
414 v4l2_info(v4l2_dev, "Trust FM Radio card driver v1.0.\n");
416 write_i2c(tr, 2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */
417 write_i2c(tr, 2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */
418 write_i2c(tr, 2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */
419 write_i2c(tr, 2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */
420 write_i2c(tr, 2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */
422 tr_setvol(tr, 0xffff);
423 tr_setbass(tr, 0x8000);
424 tr_settreble(tr, 0x8000);
427 /* mute card - prevents noisy bootups */
433 static void __exit cleanup_trust_module(void)
435 struct trust *tr = &trust_card;
437 video_unregister_device(&tr->vdev);
438 v4l2_device_unregister(&tr->v4l2_dev);
439 release_region(tr->io, 2);
442 module_init(trust_init);
443 module_exit(cleanup_trust_module);