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18#include <stdarg.h>
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/ioport.h>
22#include <linux/version.h>
23#include <linux/videodev2.h>
24#include <linux/io.h>
25#include <media/v4l2-device.h>
26#include <media/v4l2-ioctl.h>
27
28MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
29MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
30MODULE_LICENSE("GPL");
31
32
33
34#ifndef CONFIG_RADIO_TRUST_PORT
35#define CONFIG_RADIO_TRUST_PORT -1
36#endif
37
38static int io = CONFIG_RADIO_TRUST_PORT;
39static int radio_nr = -1;
40
41module_param(io, int, 0);
42MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
43module_param(radio_nr, int, 0);
44
45#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
46
47struct trust {
48 struct v4l2_device v4l2_dev;
49 struct video_device vdev;
50 int io;
51 int ioval;
52 __u16 curvol;
53 __u16 curbass;
54 __u16 curtreble;
55 int muted;
56 unsigned long curfreq;
57 int curstereo;
58 int curmute;
59 struct mutex lock;
60};
61
62static struct trust trust_card;
63
64
65#define TDA7318_ADDR 0x88
66#define TSA6060T_ADDR 0xc4
67
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)
73
74static void write_i2c(struct trust *tr, int n, ...)
75{
76 unsigned char val, mask;
77 va_list args;
78
79 va_start(args, n);
80
81
82 TR_SET_SDA;
83 TR_SET_SCL;
84 TR_DELAY;
85 TR_CLR_SDA;
86 TR_CLR_SCL;
87 TR_DELAY;
88
89 for(; n; n--) {
90 val = va_arg(args, unsigned);
91 for(mask = 0x80; mask; mask >>= 1) {
92 if(val & mask)
93 TR_SET_SDA;
94 else
95 TR_CLR_SDA;
96 TR_SET_SCL;
97 TR_DELAY;
98 TR_CLR_SCL;
99 TR_DELAY;
100 }
101
102 TR_SET_SDA;
103 TR_SET_SCL;
104 TR_DELAY;
105 TR_CLR_SCL;
106 TR_DELAY;
107 }
108
109
110 TR_CLR_SDA;
111 TR_DELAY;
112 TR_SET_SCL;
113 TR_DELAY;
114 TR_SET_SDA;
115 TR_DELAY;
116
117 va_end(args);
118}
119
120static void tr_setvol(struct trust *tr, __u16 vol)
121{
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);
126}
127
128static int basstreble2chip[15] = {
129 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
130};
131
132static void tr_setbass(struct trust *tr, __u16 bass)
133{
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);
138}
139
140static void tr_settreble(struct trust *tr, __u16 treble)
141{
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);
146}
147
148static void tr_setstereo(struct trust *tr, int stereo)
149{
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);
155}
156
157static void tr_setmute(struct trust *tr, int mute)
158{
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);
164}
165
166static int tr_getsigstr(struct trust *tr)
167{
168 int i, v;
169
170 mutex_lock(&tr->lock);
171 for (i = 0, v = 0; i < 100; i++)
172 v |= inb(tr->io);
173 mutex_unlock(&tr->lock);
174 return (v & 1) ? 0 : 0xffff;
175}
176
177static int tr_getstereo(struct trust *tr)
178{
179
180 return tr->curstereo;
181}
182
183static void tr_setfreq(struct trust *tr, unsigned long f)
184{
185 mutex_lock(&tr->lock);
186 tr->curfreq = f;
187 f /= 160;
188 f += 1070;
189 write_i2c(tr, 5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
190 mutex_unlock(&tr->lock);
191}
192
193static int vidioc_querycap(struct file *file, void *priv,
194 struct v4l2_capability *v)
195{
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;
201 return 0;
202}
203
204static int vidioc_g_tuner(struct file *file, void *priv,
205 struct v4l2_tuner *v)
206{
207 struct trust *tr = video_drvdata(file);
208
209 if (v->index > 0)
210 return -EINVAL;
211
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;
220 else
221 v->audmode = V4L2_TUNER_MODE_MONO;
222 v->signal = tr_getsigstr(tr);
223 return 0;
224}
225
226static int vidioc_s_tuner(struct file *file, void *priv,
227 struct v4l2_tuner *v)
228{
229 struct trust *tr = video_drvdata(file);
230
231 if (v->index)
232 return -EINVAL;
233 tr_setstereo(tr, v->audmode == V4L2_TUNER_MODE_STEREO);
234 return 0;
235}
236
237static int vidioc_s_frequency(struct file *file, void *priv,
238 struct v4l2_frequency *f)
239{
240 struct trust *tr = video_drvdata(file);
241
242 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
243 return -EINVAL;
244 tr_setfreq(tr, f->frequency);
245 return 0;
246}
247
248static int vidioc_g_frequency(struct file *file, void *priv,
249 struct v4l2_frequency *f)
250{
251 struct trust *tr = video_drvdata(file);
252
253 if (f->tuner != 0)
254 return -EINVAL;
255 f->type = V4L2_TUNER_RADIO;
256 f->frequency = tr->curfreq;
257 return 0;
258}
259
260static int vidioc_queryctrl(struct file *file, void *priv,
261 struct v4l2_queryctrl *qc)
262{
263 switch (qc->id) {
264 case V4L2_CID_AUDIO_MUTE:
265 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
266 case V4L2_CID_AUDIO_VOLUME:
267 return v4l2_ctrl_query_fill(qc, 0, 65535, 2048, 65535);
268 case V4L2_CID_AUDIO_BASS:
269 case V4L2_CID_AUDIO_TREBLE:
270 return v4l2_ctrl_query_fill(qc, 0, 65535, 4370, 32768);
271 }
272 return -EINVAL;
273}
274
275static int vidioc_g_ctrl(struct file *file, void *priv,
276 struct v4l2_control *ctrl)
277{
278 struct trust *tr = video_drvdata(file);
279
280 switch (ctrl->id) {
281 case V4L2_CID_AUDIO_MUTE:
282 ctrl->value = tr->curmute;
283 return 0;
284 case V4L2_CID_AUDIO_VOLUME:
285 ctrl->value = tr->curvol * 2048;
286 return 0;
287 case V4L2_CID_AUDIO_BASS:
288 ctrl->value = tr->curbass * 4370;
289 return 0;
290 case V4L2_CID_AUDIO_TREBLE:
291 ctrl->value = tr->curtreble * 4370;
292 return 0;
293 }
294 return -EINVAL;
295}
296
297static int vidioc_s_ctrl(struct file *file, void *priv,
298 struct v4l2_control *ctrl)
299{
300 struct trust *tr = video_drvdata(file);
301
302 switch (ctrl->id) {
303 case V4L2_CID_AUDIO_MUTE:
304 tr_setmute(tr, ctrl->value);
305 return 0;
306 case V4L2_CID_AUDIO_VOLUME:
307 tr_setvol(tr, ctrl->value);
308 return 0;
309 case V4L2_CID_AUDIO_BASS:
310 tr_setbass(tr, ctrl->value);
311 return 0;
312 case V4L2_CID_AUDIO_TREBLE:
313 tr_settreble(tr, ctrl->value);
314 return 0;
315 }
316 return -EINVAL;
317}
318
319static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
320{
321 *i = 0;
322 return 0;
323}
324
325static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
326{
327 return i ? -EINVAL : 0;
328}
329
330static int vidioc_g_audio(struct file *file, void *priv,
331 struct v4l2_audio *a)
332{
333 a->index = 0;
334 strlcpy(a->name, "Radio", sizeof(a->name));
335 a->capability = V4L2_AUDCAP_STEREO;
336 return 0;
337}
338
339static int vidioc_s_audio(struct file *file, void *priv,
340 struct v4l2_audio *a)
341{
342 return a->index ? -EINVAL : 0;
343}
344
345static const struct v4l2_file_operations trust_fops = {
346 .owner = THIS_MODULE,
347 .unlocked_ioctl = video_ioctl2,
348};
349
350static const struct v4l2_ioctl_ops trust_ioctl_ops = {
351 .vidioc_querycap = vidioc_querycap,
352 .vidioc_g_tuner = vidioc_g_tuner,
353 .vidioc_s_tuner = vidioc_s_tuner,
354 .vidioc_g_frequency = vidioc_g_frequency,
355 .vidioc_s_frequency = vidioc_s_frequency,
356 .vidioc_queryctrl = vidioc_queryctrl,
357 .vidioc_g_ctrl = vidioc_g_ctrl,
358 .vidioc_s_ctrl = vidioc_s_ctrl,
359 .vidioc_g_audio = vidioc_g_audio,
360 .vidioc_s_audio = vidioc_s_audio,
361 .vidioc_g_input = vidioc_g_input,
362 .vidioc_s_input = vidioc_s_input,
363};
364
365static int __init trust_init(void)
366{
367 struct trust *tr = &trust_card;
368 struct v4l2_device *v4l2_dev = &tr->v4l2_dev;
369 int res;
370
371 strlcpy(v4l2_dev->name, "trust", sizeof(v4l2_dev->name));
372 tr->io = io;
373 tr->ioval = 0xf;
374 mutex_init(&tr->lock);
375
376 if (tr->io == -1) {
377 v4l2_err(v4l2_dev, "You must set an I/O address with io=0x0x350 or 0x358\n");
378 return -EINVAL;
379 }
380 if (!request_region(tr->io, 2, "Trust FM Radio")) {
381 v4l2_err(v4l2_dev, "port 0x%x already in use\n", tr->io);
382 return -EBUSY;
383 }
384
385 res = v4l2_device_register(NULL, v4l2_dev);
386 if (res < 0) {
387 release_region(tr->io, 2);
388 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
389 return res;
390 }
391
392 strlcpy(tr->vdev.name, v4l2_dev->name, sizeof(tr->vdev.name));
393 tr->vdev.v4l2_dev = v4l2_dev;
394 tr->vdev.fops = &trust_fops;
395 tr->vdev.ioctl_ops = &trust_ioctl_ops;
396 tr->vdev.release = video_device_release_empty;
397 video_set_drvdata(&tr->vdev, tr);
398
399 write_i2c(tr, 2, TDA7318_ADDR, 0x80);
400 write_i2c(tr, 2, TDA7318_ADDR, 0xa0);
401 write_i2c(tr, 2, TDA7318_ADDR, 0xc0);
402 write_i2c(tr, 2, TDA7318_ADDR, 0xe0);
403 write_i2c(tr, 2, TDA7318_ADDR, 0x40);
404
405 tr_setvol(tr, 0xffff);
406 tr_setbass(tr, 0x8000);
407 tr_settreble(tr, 0x8000);
408 tr_setstereo(tr, 1);
409
410
411 tr_setmute(tr, 1);
412
413 if (video_register_device(&tr->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
414 v4l2_device_unregister(v4l2_dev);
415 release_region(tr->io, 2);
416 return -EINVAL;
417 }
418
419 v4l2_info(v4l2_dev, "Trust FM Radio card driver v1.0.\n");
420
421 return 0;
422}
423
424static void __exit cleanup_trust_module(void)
425{
426 struct trust *tr = &trust_card;
427
428 video_unregister_device(&tr->vdev);
429 v4l2_device_unregister(&tr->v4l2_dev);
430 release_region(tr->io, 2);
431}
432
433module_init(trust_init);
434module_exit(cleanup_trust_module);
435
