aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/video/tuner-core.c
blob: 6212388edb75b0035b19761eb00bfec503b0a4ce (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
/*
 * $Id: tuner-core.c,v 1.5 2005/02/15 15:59:35 kraxel Exp $
 *
 * i2c tv tuner chip device driver
 * core core, i.e. kernel interfaces, registering and so on
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/videodev.h>
#include <linux/init.h>

#include <media/tuner.h>
#include <media/audiochip.h>

#define UNSET (-1U)

/* standard i2c insmod options */
static unsigned short normal_i2c[] = {
	0x4b, /* tda8290 */
	I2C_CLIENT_END
};
static unsigned short normal_i2c_range[] = {
	0x60, 0x6f,
	I2C_CLIENT_END
};
I2C_CLIENT_INSMOD;

/* insmod options used at init time => read/only */
static unsigned int addr  =  0;
module_param(addr, int, 0444);

/* insmod options used at runtime => read/write */
unsigned int tuner_debug   = 0;
module_param(tuner_debug,       int, 0644);

static unsigned int tv_range[2]    = { 44, 958 };
static unsigned int radio_range[2] = { 65, 108 };

module_param_array(tv_range,    int, NULL, 0644);
module_param_array(radio_range, int, NULL, 0644);

MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners");
MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
MODULE_LICENSE("GPL");

static int this_adap;

static struct i2c_driver driver;
static struct i2c_client client_template;

/* ---------------------------------------------------------------------- */

// Set tuner frequency,  freq in Units of 62.5kHz = 1/16MHz
static void set_tv_freq(struct i2c_client *c, unsigned int freq)
{
	struct tuner *t = i2c_get_clientdata(c);

	if (t->type == UNSET) {
		tuner_info("tuner type not set\n");
		return;
	}
	if (NULL == t->tv_freq) {
		tuner_info("Huh? tv_set is NULL?\n");
		return;
	}
	if (freq < tv_range[0]*16 || freq > tv_range[1]*16) {
		/* FIXME: better do that chip-specific, but
		   right now we don't have that in the config
		   struct and this way is still better than no
		   check at all */
		tuner_info("TV freq (%d.%02d) out of range (%d-%d)\n",
			   freq/16,freq%16*100/16,tv_range[0],tv_range[1]);
		return;
	}
	t->tv_freq(c,freq);
}

static void set_radio_freq(struct i2c_client *c, unsigned int freq)
{
	struct tuner *t = i2c_get_clientdata(c);

	if (t->type == UNSET) {
		tuner_info("tuner type not set\n");
		return;
	}
	if (NULL == t->radio_freq) {
		tuner_info("no radio tuning for this one, sorry.\n");
		return;
	}
	if (freq < radio_range[0]*16 || freq > radio_range[1]*16) {
		tuner_info("radio freq (%d.%02d) out of range (%d-%d)\n",
			   freq/16,freq%16*100/16,
			   radio_range[0],radio_range[1]);
		return;
	}
	t->radio_freq(c,freq);
}

static void set_freq(struct i2c_client *c, unsigned long freq)
{
	struct tuner *t = i2c_get_clientdata(c);

	switch (t->mode) {
	case V4L2_TUNER_RADIO:
		tuner_dbg("radio freq set to %lu.%02lu\n",
			  freq/16,freq%16*100/16);
		set_radio_freq(c,freq);
		break;
	case V4L2_TUNER_ANALOG_TV:
	case V4L2_TUNER_DIGITAL_TV:
		tuner_dbg("tv freq set to %lu.%02lu\n",
			  freq/16,freq%16*100/16);
		set_tv_freq(c, freq);
		break;
	}
	t->freq = freq;
}

static void set_type(struct i2c_client *c, unsigned int type)
{
	struct tuner *t = i2c_get_clientdata(c);

	/* sanity check */
	if (type == UNSET  ||  type == TUNER_ABSENT)
		return;
	if (type >= tuner_count)
		return;

	if (NULL == t->i2c.dev.driver) {
		/* not registered yet */
		t->type = type;
		return;
	}
	if (t->initialized)
		/* run only once */
		return;

	t->initialized = 1;
	t->type = type;
	switch (t->type) {
	case TUNER_MT2032:
		microtune_init(c);
		break;
	case TUNER_PHILIPS_TDA8290:
		tda8290_init(c);
		break;
	default:
		default_tuner_init(c);
		break;
	}
}

static char pal[] = "-";
module_param_string(pal, pal, sizeof(pal), 0644);

static int tuner_fixup_std(struct tuner *t)
{
	if ((t->std & V4L2_STD_PAL) == V4L2_STD_PAL) {
		/* get more precise norm info from insmod option */
		switch (pal[0]) {
		case 'b':
		case 'B':
		case 'g':
		case 'G':
			tuner_dbg("insmod fixup: PAL => PAL-BG\n");
			t->std = V4L2_STD_PAL_BG;
			break;
		case 'i':
		case 'I':
			tuner_dbg("insmod fixup: PAL => PAL-I\n");
			t->std = V4L2_STD_PAL_I;
			break;
		case 'd':
		case 'D':
		case 'k':
		case 'K':
			tuner_dbg("insmod fixup: PAL => PAL-DK\n");
			t->std = V4L2_STD_PAL_DK;
			break;
		}
	}
	return 0;
}

/* ---------------------------------------------------------------------- */

static int tuner_attach(struct i2c_adapter *adap, int addr, int kind)
{
	struct tuner *t;

	if (this_adap > 0)
		return -1;
	this_adap++;

        client_template.adapter = adap;
        client_template.addr = addr;

        t = kmalloc(sizeof(struct tuner),GFP_KERNEL);
        if (NULL == t)
                return -ENOMEM;
        memset(t,0,sizeof(struct tuner));
        memcpy(&t->i2c,&client_template,sizeof(struct i2c_client));
	i2c_set_clientdata(&t->i2c, t);
	t->type       = UNSET;
	t->radio_if2  = 10700*1000; // 10.7MHz - FM radio

        i2c_attach_client(&t->i2c);
	tuner_info("chip found @ 0x%x (%s)\n",
		   addr << 1, adap->name);
	set_type(&t->i2c, t->type);
	return 0;
}

static int tuner_probe(struct i2c_adapter *adap)
{
	if (0 != addr) {
		normal_i2c[0]       = addr;
		normal_i2c_range[0] = addr;
		normal_i2c_range[1] = addr;
	}
	this_adap = 0;

	if (adap->class & I2C_CLASS_TV_ANALOG)
		return i2c_probe(adap, &addr_data, tuner_attach);
	return 0;
}

static int tuner_detach(struct i2c_client *client)
{
	struct tuner *t = i2c_get_clientdata(client);

	i2c_detach_client(&t->i2c);
	kfree(t);
	return 0;
}

#define SWITCH_V4L2	if (!t->using_v4l2 && tuner_debug) \
		          tuner_info("switching to v4l2\n"); \
	                  t->using_v4l2 = 1;
#define CHECK_V4L2	if (t->using_v4l2) { if (tuner_debug) \
			  tuner_info("ignore v4l1 call\n"); \
		          return 0; }

static int
tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
{
	struct tuner *t = i2c_get_clientdata(client);
        unsigned int *iarg = (int*)arg;

        switch (cmd) {

	/* --- configuration --- */
	case TUNER_SET_TYPE:
		set_type(client,*iarg);
		break;
	case AUDC_SET_RADIO:
		if (V4L2_TUNER_RADIO != t->mode) {
			set_tv_freq(client,400 * 16);
			t->mode = V4L2_TUNER_RADIO;
		}
		break;
	case AUDC_CONFIG_PINNACLE:
		switch (*iarg) {
		case 2:
			tuner_dbg("pinnacle pal\n");
			t->radio_if2 = 33300 * 1000;
			break;
		case 3:
			tuner_dbg("pinnacle ntsc\n");
			t->radio_if2 = 41300 * 1000;
			break;
		}
                break;

	/* --- v4l ioctls --- */
	/* take care: bttv does userspace copying, we'll get a
	   kernel pointer here... */
	case VIDIOCSCHAN:
	{
		static const v4l2_std_id map[] = {
			[ VIDEO_MODE_PAL   ] = V4L2_STD_PAL,
			[ VIDEO_MODE_NTSC  ] = V4L2_STD_NTSC_M,
			[ VIDEO_MODE_SECAM ] = V4L2_STD_SECAM,
			[ 4 /* bttv */     ] = V4L2_STD_PAL_M,
			[ 5 /* bttv */     ] = V4L2_STD_PAL_N,
			[ 6 /* bttv */     ] = V4L2_STD_NTSC_M_JP,
		};
		struct video_channel *vc = arg;

		CHECK_V4L2;
		t->mode = V4L2_TUNER_ANALOG_TV;
		if (vc->norm < ARRAY_SIZE(map))
			t->std = map[vc->norm];
		tuner_fixup_std(t);
		if (t->freq)
			set_tv_freq(client,t->freq);
		return 0;
	}
	case VIDIOCSFREQ:
	{
		unsigned long *v = arg;

		CHECK_V4L2;
		set_freq(client,*v);
		return 0;
	}
	case VIDIOCGTUNER:
	{
		struct video_tuner *vt = arg;

		CHECK_V4L2;
		if (V4L2_TUNER_RADIO == t->mode  &&  t->has_signal)
			vt->signal = t->has_signal(client);
		return 0;
	}
	case VIDIOCGAUDIO:
	{
		struct video_audio *va = arg;

		CHECK_V4L2;
		if (V4L2_TUNER_RADIO == t->mode  &&  t->is_stereo)
			va->mode = t->is_stereo(client)
				? VIDEO_SOUND_STEREO
				: VIDEO_SOUND_MONO;
		return 0;
	}

	case VIDIOC_S_STD:
	{
		v4l2_std_id *id = arg;

		SWITCH_V4L2;
		t->mode = V4L2_TUNER_ANALOG_TV;
		t->std = *id;
		tuner_fixup_std(t);
		if (t->freq)
			set_freq(client,t->freq);
		break;
	}
	case VIDIOC_S_FREQUENCY:
	{
		struct v4l2_frequency *f = arg;

		SWITCH_V4L2;
		if (V4L2_TUNER_RADIO == f->type &&
		    V4L2_TUNER_RADIO != t->mode)
			set_tv_freq(client,400*16);
		t->mode  = f->type;
		set_freq(client,f->frequency);
		break;
	}
	case VIDIOC_G_FREQUENCY:
	{
		struct v4l2_frequency *f = arg;

		SWITCH_V4L2;
		f->type = t->mode;
		f->frequency = t->freq;
		break;
	}
	case VIDIOC_G_TUNER:
	{
		struct v4l2_tuner *tuner = arg;

		SWITCH_V4L2;
		if (V4L2_TUNER_RADIO == t->mode  &&  t->has_signal)
			tuner->signal = t->has_signal(client);
		tuner->rangelow = tv_range[0] * 16;
		tuner->rangehigh = tv_range[1] * 16;
		break;
	}
	default:
		/* nothing */
		break;
	}

	return 0;
}

static int tuner_suspend(struct device * dev, pm_message_t state, u32 level)
{
	struct i2c_client *c = container_of(dev, struct i2c_client, dev);
	struct tuner *t = i2c_get_clientdata(c);

	tuner_dbg("suspend\n");
	/* FIXME: power down ??? */
	return 0;
}

static int tuner_resume(struct device * dev, u32 level)
{
	struct i2c_client *c = container_of(dev, struct i2c_client, dev);
	struct tuner *t = i2c_get_clientdata(c);

	tuner_dbg("resume\n");
	if (t->freq)
		set_freq(c,t->freq);
	return 0;
}

/* ----------------------------------------------------------------------- */

static struct i2c_driver driver = {
	.owner          = THIS_MODULE,
        .name           = "tuner",
        .id             = I2C_DRIVERID_TUNER,
        .flags          = I2C_DF_NOTIFY,
        .attach_adapter = tuner_probe,
        .detach_client  = tuner_detach,
        .command        = tuner_command,
	.driver = {
		.suspend = tuner_suspend,
		.resume  = tuner_resume,
	},
};
static struct i2c_client client_template =
{
	I2C_DEVNAME("(tuner unset)"),
	.flags      = I2C_CLIENT_ALLOW_USE,
        .driver     = &driver,
};

static int __init tuner_init_module(void)
{
	return i2c_add_driver(&driver);
}

static void __exit tuner_cleanup_module(void)
{
	i2c_del_driver(&driver);
}

module_init(tuner_init_module);
module_exit(tuner_cleanup_module);

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-basic-offset: 8
 * End:
 */