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 <media/v4l2-device.h>
26 #include <media/v4l2-ioctl.h>
28 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
29 MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
30 MODULE_LICENSE("GPL");
32 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
34 #ifndef CONFIG_RADIO_TRUST_PORT
35 #define CONFIG_RADIO_TRUST_PORT -1
38 static int io = CONFIG_RADIO_TRUST_PORT;
39 static int radio_nr = -1;
41 module_param(io, int, 0);
42 MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
43 module_param(radio_nr, int, 0);
45 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
48 struct v4l2_device v4l2_dev;
49 struct video_device vdev;
56 unsigned long curfreq;
62 static struct trust trust_card;
65 #define TDA7318_ADDR 0x88
66 #define TSA6060T_ADDR 0xc4
68 #define TR_DELAY do { inb(tr->io); inb(tr->io); inb(tr->io); } while (0)
69 #define TR_SET_SCL outb(tr->ioval |= 2, tr->io)
70 #define TR_CLR_SCL outb(tr->ioval &= 0xfd, tr->io)
71 #define TR_SET_SDA outb(tr->ioval |= 1, tr->io)
72 #define TR_CLR_SDA outb(tr->ioval &= 0xfe, tr->io)
74 static void write_i2c(struct trust *tr, int n, ...)
76 unsigned char val, mask;
90 val = va_arg(args, unsigned);
91 for(mask = 0x80; mask; mask >>= 1) {
101 /* acknowledge bit */
120 static void tr_setvol(struct trust *tr, __u16 vol)
122 mutex_lock(&tr->lock);
123 tr->curvol = vol / 2048;
124 write_i2c(tr, 2, TDA7318_ADDR, tr->curvol ^ 0x1f);
125 mutex_unlock(&tr->lock);
128 static int basstreble2chip[15] = {
129 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
132 static void tr_setbass(struct trust *tr, __u16 bass)
134 mutex_lock(&tr->lock);
135 tr->curbass = bass / 4370;
136 write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[tr->curbass]);
137 mutex_unlock(&tr->lock);
140 static void tr_settreble(struct trust *tr, __u16 treble)
142 mutex_lock(&tr->lock);
143 tr->curtreble = treble / 4370;
144 write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[tr->curtreble]);
145 mutex_unlock(&tr->lock);
148 static void tr_setstereo(struct trust *tr, int stereo)
150 mutex_lock(&tr->lock);
151 tr->curstereo = !!stereo;
152 tr->ioval = (tr->ioval & 0xfb) | (!tr->curstereo << 2);
153 outb(tr->ioval, tr->io);
154 mutex_unlock(&tr->lock);
157 static void tr_setmute(struct trust *tr, int mute)
159 mutex_lock(&tr->lock);
160 tr->curmute = !!mute;
161 tr->ioval = (tr->ioval & 0xf7) | (tr->curmute << 3);
162 outb(tr->ioval, tr->io);
163 mutex_unlock(&tr->lock);
166 static int tr_getsigstr(struct trust *tr)
170 mutex_lock(&tr->lock);
171 for (i = 0, v = 0; i < 100; i++)
173 mutex_unlock(&tr->lock);
174 return (v & 1) ? 0 : 0xffff;
177 static int tr_getstereo(struct trust *tr)
179 /* don't know how to determine it, just return the setting */
180 return tr->curstereo;
183 static void tr_setfreq(struct trust *tr, unsigned long f)
185 mutex_lock(&tr->lock);
187 f /= 160; /* Convert to 10 kHz units */
188 f += 1070; /* Add 10.7 MHz IF */
189 write_i2c(tr, 5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
190 mutex_unlock(&tr->lock);
193 static int vidioc_querycap(struct file *file, void *priv,
194 struct v4l2_capability *v)
196 strlcpy(v->driver, "radio-trust", sizeof(v->driver));
197 strlcpy(v->card, "Trust FM Radio", sizeof(v->card));
198 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
199 v->version = RADIO_VERSION;
200 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
204 static int vidioc_g_tuner(struct file *file, void *priv,
205 struct v4l2_tuner *v)
207 struct trust *tr = video_drvdata(file);
212 strlcpy(v->name, "FM", sizeof(v->name));
213 v->type = V4L2_TUNER_RADIO;
214 v->rangelow = 87.5 * 16000;
215 v->rangehigh = 108 * 16000;
216 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
217 v->capability = V4L2_TUNER_CAP_LOW;
218 if (tr_getstereo(tr))
219 v->audmode = V4L2_TUNER_MODE_STEREO;
221 v->audmode = V4L2_TUNER_MODE_MONO;
222 v->signal = tr_getsigstr(tr);
226 static int vidioc_s_tuner(struct file *file, void *priv,
227 struct v4l2_tuner *v)
229 struct trust *tr = video_drvdata(file);
233 tr_setstereo(tr, v->audmode == V4L2_TUNER_MODE_STEREO);
237 static int vidioc_s_frequency(struct file *file, void *priv,
238 struct v4l2_frequency *f)
240 struct trust *tr = video_drvdata(file);
242 tr_setfreq(tr, f->frequency);
246 static int vidioc_g_frequency(struct file *file, void *priv,
247 struct v4l2_frequency *f)
249 struct trust *tr = video_drvdata(file);
251 f->type = V4L2_TUNER_RADIO;
252 f->frequency = tr->curfreq;
256 static int vidioc_queryctrl(struct file *file, void *priv,
257 struct v4l2_queryctrl *qc)
260 case V4L2_CID_AUDIO_MUTE:
261 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
262 case V4L2_CID_AUDIO_VOLUME:
263 return v4l2_ctrl_query_fill(qc, 0, 65535, 2048, 65535);
264 case V4L2_CID_AUDIO_BASS:
265 case V4L2_CID_AUDIO_TREBLE:
266 return v4l2_ctrl_query_fill(qc, 0, 65535, 4370, 32768);
271 static int vidioc_g_ctrl(struct file *file, void *priv,
272 struct v4l2_control *ctrl)
274 struct trust *tr = video_drvdata(file);
277 case V4L2_CID_AUDIO_MUTE:
278 ctrl->value = tr->curmute;
280 case V4L2_CID_AUDIO_VOLUME:
281 ctrl->value = tr->curvol * 2048;
283 case V4L2_CID_AUDIO_BASS:
284 ctrl->value = tr->curbass * 4370;
286 case V4L2_CID_AUDIO_TREBLE:
287 ctrl->value = tr->curtreble * 4370;
293 static int vidioc_s_ctrl(struct file *file, void *priv,
294 struct v4l2_control *ctrl)
296 struct trust *tr = video_drvdata(file);
299 case V4L2_CID_AUDIO_MUTE:
300 tr_setmute(tr, ctrl->value);
302 case V4L2_CID_AUDIO_VOLUME:
303 tr_setvol(tr, ctrl->value);
305 case V4L2_CID_AUDIO_BASS:
306 tr_setbass(tr, ctrl->value);
308 case V4L2_CID_AUDIO_TREBLE:
309 tr_settreble(tr, ctrl->value);
315 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
321 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
323 return i ? -EINVAL : 0;
326 static int vidioc_g_audio(struct file *file, void *priv,
327 struct v4l2_audio *a)
330 strlcpy(a->name, "Radio", sizeof(a->name));
331 a->capability = V4L2_AUDCAP_STEREO;
335 static int vidioc_s_audio(struct file *file, void *priv,
336 struct v4l2_audio *a)
338 return a->index ? -EINVAL : 0;
341 static int trust_open(struct file *file)
346 static int trust_release(struct file *file)
351 static const struct v4l2_file_operations trust_fops = {
352 .owner = THIS_MODULE,
354 .release = trust_release,
355 .ioctl = video_ioctl2,
358 static const struct v4l2_ioctl_ops trust_ioctl_ops = {
359 .vidioc_querycap = vidioc_querycap,
360 .vidioc_g_tuner = vidioc_g_tuner,
361 .vidioc_s_tuner = vidioc_s_tuner,
362 .vidioc_g_frequency = vidioc_g_frequency,
363 .vidioc_s_frequency = vidioc_s_frequency,
364 .vidioc_queryctrl = vidioc_queryctrl,
365 .vidioc_g_ctrl = vidioc_g_ctrl,
366 .vidioc_s_ctrl = vidioc_s_ctrl,
367 .vidioc_g_audio = vidioc_g_audio,
368 .vidioc_s_audio = vidioc_s_audio,
369 .vidioc_g_input = vidioc_g_input,
370 .vidioc_s_input = vidioc_s_input,
373 static int __init trust_init(void)
375 struct trust *tr = &trust_card;
376 struct v4l2_device *v4l2_dev = &tr->v4l2_dev;
379 strlcpy(v4l2_dev->name, "trust", sizeof(v4l2_dev->name));
382 mutex_init(&tr->lock);
385 v4l2_err(v4l2_dev, "You must set an I/O address with io=0x0x350 or 0x358\n");
388 if (!request_region(tr->io, 2, "Trust FM Radio")) {
389 v4l2_err(v4l2_dev, "port 0x%x already in use\n", tr->io);
393 res = v4l2_device_register(NULL, v4l2_dev);
395 release_region(tr->io, 2);
396 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
400 strlcpy(tr->vdev.name, v4l2_dev->name, sizeof(tr->vdev.name));
401 tr->vdev.v4l2_dev = v4l2_dev;
402 tr->vdev.fops = &trust_fops;
403 tr->vdev.ioctl_ops = &trust_ioctl_ops;
404 tr->vdev.release = video_device_release_empty;
405 video_set_drvdata(&tr->vdev, tr);
407 if (video_register_device(&tr->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
408 v4l2_device_unregister(v4l2_dev);
409 release_region(tr->io, 2);
413 v4l2_info(v4l2_dev, "Trust FM Radio card driver v1.0.\n");
415 write_i2c(tr, 2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */
416 write_i2c(tr, 2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */
417 write_i2c(tr, 2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */
418 write_i2c(tr, 2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */
419 write_i2c(tr, 2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */
421 tr_setvol(tr, 0xffff);
422 tr_setbass(tr, 0x8000);
423 tr_settreble(tr, 0x8000);
426 /* mute card - prevents noisy bootups */
432 static void __exit cleanup_trust_module(void)
434 struct trust *tr = &trust_card;
436 video_unregister_device(&tr->vdev);
437 v4l2_device_unregister(&tr->v4l2_dev);
438 release_region(tr->io, 2);
441 module_init(trust_init);
442 module_exit(cleanup_trust_module);