summaryrefslogtreecommitdiff
path: root/drivers/media/dvb-frontends/horus3a.c
blob: 0330b78a5b3f29a88e65dcc228a6f09a2125434a (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
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * horus3a.h
 *
 * Sony Horus3A DVB-S/S2 tuner driver
 *
 * Copyright 2012 Sony Corporation
 * Copyright (C) 2014 NetUP Inc.
 * Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
 * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
 */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/dvb/frontend.h>
#include <linux/types.h>
#include "horus3a.h"
#include <media/dvb_frontend.h>

#define MAX_WRITE_REGSIZE      5

enum horus3a_state {
	STATE_UNKNOWN,
	STATE_SLEEP,
	STATE_ACTIVE
};

struct horus3a_priv {
	u32			frequency;
	u8			i2c_address;
	struct i2c_adapter	*i2c;
	enum horus3a_state	state;
	void			*set_tuner_data;
	int			(*set_tuner)(void *, int);
};

static void horus3a_i2c_debug(struct horus3a_priv *priv,
			      u8 reg, u8 write, const u8 *data, u32 len)
{
	dev_dbg(&priv->i2c->dev, "horus3a: I2C %s reg 0x%02x size %d\n",
		(write == 0 ? "read" : "write"), reg, len);
	print_hex_dump_bytes("horus3a: I2C data: ",
		DUMP_PREFIX_OFFSET, data, len);
}

static int horus3a_write_regs(struct horus3a_priv *priv,
			      u8 reg, const u8 *data, u32 len)
{
	int ret;
	u8 buf[MAX_WRITE_REGSIZE + 1];
	struct i2c_msg msg[1] = {
		{
			.addr = priv->i2c_address,
			.flags = 0,
			.len = len + 1,
			.buf = buf,
		}
	};

	if (len + 1 > sizeof(buf)) {
		dev_warn(&priv->i2c->dev,"wr reg=%04x: len=%d is too big!\n",
			 reg, len + 1);
		return -E2BIG;
	}

	horus3a_i2c_debug(priv, reg, 1, data, len);
	buf[0] = reg;
	memcpy(&buf[1], data, len);
	ret = i2c_transfer(priv->i2c, msg, 1);
	if (ret >= 0 && ret != 1)
		ret = -EREMOTEIO;
	if (ret < 0) {
		dev_warn(&priv->i2c->dev,
			"%s: i2c wr failed=%d reg=%02x len=%d\n",
			KBUILD_MODNAME, ret, reg, len);
		return ret;
	}
	return 0;
}

static int horus3a_write_reg(struct horus3a_priv *priv, u8 reg, u8 val)
{
	u8 tmp = val; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */

	return horus3a_write_regs(priv, reg, &tmp, 1);
}

static int horus3a_enter_power_save(struct horus3a_priv *priv)
{
	u8 data[2];

	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
	if (priv->state == STATE_SLEEP)
		return 0;
	/* IQ Generator disable */
	horus3a_write_reg(priv, 0x2a, 0x79);
	/* MDIV_EN = 0 */
	horus3a_write_reg(priv, 0x29, 0x70);
	/* VCO disable preparation */
	horus3a_write_reg(priv, 0x28, 0x3e);
	/* VCO buffer disable */
	horus3a_write_reg(priv, 0x2a, 0x19);
	/* VCO calibration disable */
	horus3a_write_reg(priv, 0x1c, 0x00);
	/* Power save setting (xtal is not stopped) */
	data[0] = 0xC0;
	/* LNA is Disabled */
	data[1] = 0xA7;
	/* 0x11 - 0x12 */
	horus3a_write_regs(priv, 0x11, data, sizeof(data));
	priv->state = STATE_SLEEP;
	return 0;
}

static int horus3a_leave_power_save(struct horus3a_priv *priv)
{
	u8 data[2];

	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
	if (priv->state == STATE_ACTIVE)
		return 0;
	/* Leave power save */
	data[0] = 0x00;
	/* LNA is Disabled */
	data[1] = 0xa7;
	/* 0x11 - 0x12 */
	horus3a_write_regs(priv, 0x11, data, sizeof(data));
	/* VCO buffer enable */
	horus3a_write_reg(priv, 0x2a, 0x79);
	/* VCO calibration enable */
	horus3a_write_reg(priv, 0x1c, 0xc0);
	/* MDIV_EN = 1 */
	horus3a_write_reg(priv, 0x29, 0x71);
	usleep_range(5000, 7000);
	priv->state = STATE_ACTIVE;
	return 0;
}

static int horus3a_init(struct dvb_frontend *fe)
{
	struct horus3a_priv *priv = fe->tuner_priv;

	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
	return 0;
}

static void horus3a_release(struct dvb_frontend *fe)
{
	struct horus3a_priv *priv = fe->tuner_priv;

	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
}

static int horus3a_sleep(struct dvb_frontend *fe)
{
	struct horus3a_priv *priv = fe->tuner_priv;

	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
	horus3a_enter_power_save(priv);
	return 0;
}

static int horus3a_set_params(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct horus3a_priv *priv = fe->tuner_priv;
	u32 frequency = p->frequency;
	u32 symbol_rate = p->symbol_rate/1000;
	u8 mixdiv = 0;
	u8 mdiv = 0;
	u32 ms = 0;
	u8 f_ctl = 0;
	u8 g_ctl = 0;
	u8 fc_lpf = 0;
	u8 data[5];

	dev_dbg(&priv->i2c->dev, "%s(): frequency %dkHz symbol_rate %dksps\n",
		__func__, frequency, symbol_rate);
	if (priv->set_tuner)
		priv->set_tuner(priv->set_tuner_data, 0);
	if (priv->state == STATE_SLEEP)
		horus3a_leave_power_save(priv);

	/* frequency should be X MHz (X : integer) */
	frequency = DIV_ROUND_CLOSEST(frequency, 1000) * 1000;
	if (frequency <= 1155000) {
		mixdiv = 4;
		mdiv = 1;
	} else {
		mixdiv = 2;
		mdiv = 0;
	}
	/* Assumed that fREF == 1MHz (1000kHz) */
	ms = DIV_ROUND_CLOSEST((frequency * mixdiv) / 2, 1000);
	if (ms > 0x7FFF) { /* 15 bit */
		dev_err(&priv->i2c->dev, "horus3a: invalid frequency %d\n",
			frequency);
		return -EINVAL;
	}
	if (frequency < 975000) {
		/* F_CTL=11100 G_CTL=001 */
		f_ctl = 0x1C;
		g_ctl = 0x01;
	} else if (frequency < 1050000) {
		/* F_CTL=11000 G_CTL=010 */
		f_ctl = 0x18;
		g_ctl = 0x02;
	} else if (frequency < 1150000) {
		/* F_CTL=10100 G_CTL=010 */
		f_ctl = 0x14;
		g_ctl = 0x02;
	} else if (frequency < 1250000) {
		/* F_CTL=10000 G_CTL=011 */
		f_ctl = 0x10;
		g_ctl = 0x03;
	} else if (frequency < 1350000) {
		/* F_CTL=01100 G_CTL=100 */
		f_ctl = 0x0C;
		g_ctl = 0x04;
	} else if (frequency < 1450000) {
		/* F_CTL=01010 G_CTL=100 */
		f_ctl = 0x0A;
		g_ctl = 0x04;
	} else if (frequency < 1600000) {
		/* F_CTL=00111 G_CTL=101 */
		f_ctl = 0x07;
		g_ctl = 0x05;
	} else if (frequency < 1800000) {
		/* F_CTL=00100 G_CTL=010 */
		f_ctl = 0x04;
		g_ctl = 0x02;
	} else if (frequency < 2000000) {
		/* F_CTL=00010 G_CTL=001 */
		f_ctl = 0x02;
		g_ctl = 0x01;
	} else {
		/* F_CTL=00000 G_CTL=000 */
		f_ctl = 0x00;
		g_ctl = 0x00;
	}
	/* LPF cutoff frequency setting */
	if (p->delivery_system == SYS_DVBS) {
		/*
		 * rolloff = 0.35
		 * SR <= 4.3
		 * fc_lpf = 5
		 * 4.3 < SR <= 10
		 * fc_lpf = SR * (1 + rolloff) / 2 + SR / 2 =
		 *	SR * 1.175 = SR * (47/40)
		 * 10 < SR
		 * fc_lpf = SR * (1 + rolloff) / 2 + 5 =
		 *	SR * 0.675 + 5 = SR * (27/40) + 5
		 * NOTE: The result should be round up.
		 */
		if (symbol_rate <= 4300)
			fc_lpf = 5;
		else if (symbol_rate <= 10000)
			fc_lpf = (u8)DIV_ROUND_UP(symbol_rate * 47, 40000);
		else
			fc_lpf = (u8)DIV_ROUND_UP(symbol_rate * 27, 40000) + 5;
		/* 5 <= fc_lpf <= 36 */
		if (fc_lpf > 36)
			fc_lpf = 36;
	} else if (p->delivery_system == SYS_DVBS2) {
		/*
		 * SR <= 4.5:
		 * fc_lpf = 5
		 * 4.5 < SR <= 10:
		 * fc_lpf = SR * (1 + rolloff) / 2 + SR / 2
		 * 10 < SR:
		 * fc_lpf = SR * (1 + rolloff) / 2 + 5
		 * NOTE: The result should be round up.
		 */
		if (symbol_rate <= 4500)
			fc_lpf = 5;
		else if (symbol_rate <= 10000)
			fc_lpf = (u8)((symbol_rate * 11 + (10000-1)) / 10000);
		else
			fc_lpf = (u8)((symbol_rate * 3 + (5000-1)) / 5000 + 5);
		/* 5 <= fc_lpf <= 36 is valid */
		if (fc_lpf > 36)
			fc_lpf = 36;
	} else {
		dev_err(&priv->i2c->dev,
			"horus3a: invalid delivery system %d\n",
			p->delivery_system);
		return -EINVAL;
	}
	/* 0x00 - 0x04 */
	data[0] = (u8)((ms >> 7) & 0xFF);
	data[1] = (u8)((ms << 1) & 0xFF);
	data[2] = 0x00;
	data[3] = 0x00;
	data[4] = (u8)(mdiv << 7);
	horus3a_write_regs(priv, 0x00, data, sizeof(data));
	/* Write G_CTL, F_CTL */
	horus3a_write_reg(priv, 0x09, (u8)((g_ctl << 5) | f_ctl));
	/* Write LPF cutoff frequency */
	horus3a_write_reg(priv, 0x37, (u8)(0x80 | (fc_lpf << 1)));
	/* Start Calibration */
	horus3a_write_reg(priv, 0x05, 0x80);
	/* IQ Generator enable */
	horus3a_write_reg(priv, 0x2a, 0x7b);
	/* tuner stabilization time */
	msleep(60);
	/* Store tuned frequency to the struct */
	priv->frequency = ms * 2 * 1000 / mixdiv;
	return 0;
}

static int horus3a_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct horus3a_priv *priv = fe->tuner_priv;

	*frequency = priv->frequency;
	return 0;
}

static const struct dvb_tuner_ops horus3a_tuner_ops = {
	.info = {
		.name = "Sony Horus3a",
		.frequency_min_hz  =  950 * MHz,
		.frequency_max_hz  = 2150 * MHz,
		.frequency_step_hz =    1 * MHz,
	},
	.init = horus3a_init,
	.release = horus3a_release,
	.sleep = horus3a_sleep,
	.set_params = horus3a_set_params,
	.get_frequency = horus3a_get_frequency,
};

struct dvb_frontend *horus3a_attach(struct dvb_frontend *fe,
				    const struct horus3a_config *config,
				    struct i2c_adapter *i2c)
{
	u8 buf[3], val;
	struct horus3a_priv *priv = NULL;

	priv = kzalloc(sizeof(struct horus3a_priv), GFP_KERNEL);
	if (priv == NULL)
		return NULL;
	priv->i2c_address = (config->i2c_address >> 1);
	priv->i2c = i2c;
	priv->set_tuner_data = config->set_tuner_priv;
	priv->set_tuner = config->set_tuner_callback;

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);

	/* wait 4ms after power on */
	usleep_range(4000, 6000);
	/* IQ Generator disable */
	horus3a_write_reg(priv, 0x2a, 0x79);
	/* REF_R = Xtal Frequency */
	buf[0] = config->xtal_freq_mhz;
	buf[1] = config->xtal_freq_mhz;
	buf[2] = 0;
	/* 0x6 - 0x8 */
	horus3a_write_regs(priv, 0x6, buf, 3);
	/* IQ Out = Single Ended */
	horus3a_write_reg(priv, 0x0a, 0x40);
	switch (config->xtal_freq_mhz) {
	case 27:
		val = 0x1f;
		break;
	case 24:
		val = 0x10;
		break;
	case 16:
		val = 0xc;
		break;
	default:
		val = 0;
		dev_warn(&priv->i2c->dev,
			"horus3a: invalid xtal frequency %dMHz\n",
			config->xtal_freq_mhz);
		break;
	}
	val <<= 2;
	horus3a_write_reg(priv, 0x0e, val);
	horus3a_enter_power_save(priv);
	usleep_range(3000, 5000);

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0);

	memcpy(&fe->ops.tuner_ops, &horus3a_tuner_ops,
				sizeof(struct dvb_tuner_ops));
	fe->tuner_priv = priv;
	dev_info(&priv->i2c->dev,
		"Sony HORUS3A attached on addr=%x at I2C adapter %p\n",
		priv->i2c_address, priv->i2c);
	return fe;
}
EXPORT_SYMBOL_GPL(horus3a_attach);

MODULE_DESCRIPTION("Sony HORUS3A satellite tuner driver");
MODULE_AUTHOR("Sergey Kozlov <serjk@netup.ru>");
MODULE_LICENSE("GPL");