aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/dvb-frontends/itd1000.c
blob: c1c3400b2173508d3ce2ba77b236d16c2eec48c9 (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
/*
 *  Driver for the Integrant ITD1000 "Zero-IF Tuner IC for Direct Broadcast Satellite"
 *
 *  Copyright (c) 2007-8 Patrick Boettcher <pb@linuxtv.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.=
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/delay.h>
#include <linux/dvb/frontend.h>
#include <linux/i2c.h>
#include <linux/slab.h>

#include "dvb_frontend.h"

#include "itd1000.h"
#include "itd1000_priv.h"

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");

#define itd_dbg(args...)  do { \
	if (debug) { \
		printk(KERN_DEBUG   "ITD1000: " args);\
	} \
} while (0)

#define itd_warn(args...) do { \
	printk(KERN_WARNING "ITD1000: " args); \
} while (0)

#define itd_info(args...) do { \
	printk(KERN_INFO    "ITD1000: " args); \
} while (0)

/* don't write more than one byte with flexcop behind */
static int itd1000_write_regs(struct itd1000_state *state, u8 reg, u8 v[], u8 len)
{
	u8 buf[1+len];
	struct i2c_msg msg = {
		.addr = state->cfg->i2c_address, .flags = 0, .buf = buf, .len = len+1
	};
	buf[0] = reg;
	memcpy(&buf[1], v, len);

	/* itd_dbg("wr %02x: %02x\n", reg, v[0]); */

	if (i2c_transfer(state->i2c, &msg, 1) != 1) {
		printk(KERN_WARNING "itd1000 I2C write failed\n");
		return -EREMOTEIO;
	}
	return 0;
}

static int itd1000_read_reg(struct itd1000_state *state, u8 reg)
{
	u8 val;
	struct i2c_msg msg[2] = {
		{ .addr = state->cfg->i2c_address, .flags = 0,        .buf = &reg, .len = 1 },
		{ .addr = state->cfg->i2c_address, .flags = I2C_M_RD, .buf = &val, .len = 1 },
	};

	/* ugly flexcop workaround */
	itd1000_write_regs(state, (reg - 1) & 0xff, &state->shadow[(reg - 1) & 0xff], 1);

	if (i2c_transfer(state->i2c, msg, 2) != 2) {
		itd_warn("itd1000 I2C read failed\n");
		return -EREMOTEIO;
	}
	return val;
}

static inline int itd1000_write_reg(struct itd1000_state *state, u8 r, u8 v)
{
	int ret = itd1000_write_regs(state, r, &v, 1);
	state->shadow[r] = v;
	return ret;
}


static struct {
	u32 symbol_rate;
	u8  pgaext  : 4; /* PLLFH */
	u8  bbgvmin : 4; /* BBGVMIN */
} itd1000_lpf_pga[] = {
	{        0, 0x8, 0x3 },
	{  5200000, 0x8, 0x3 },
	{ 12200000, 0x4, 0x3 },
	{ 15400000, 0x2, 0x3 },
	{ 19800000, 0x2, 0x3 },
	{ 21500000, 0x2, 0x3 },
	{ 24500000, 0x2, 0x3 },
	{ 28400000, 0x2, 0x3 },
	{ 33400000, 0x2, 0x3 },
	{ 34400000, 0x1, 0x4 },
	{ 34400000, 0x1, 0x4 },
	{ 38400000, 0x1, 0x4 },
	{ 38400000, 0x1, 0x4 },
	{ 40400000, 0x1, 0x4 },
	{ 45400000, 0x1, 0x4 },
};

static void itd1000_set_lpf_bw(struct itd1000_state *state, u32 symbol_rate)
{
	u8 i;
	u8 con1    = itd1000_read_reg(state, CON1)    & 0xfd;
	u8 pllfh   = itd1000_read_reg(state, PLLFH)   & 0x0f;
	u8 bbgvmin = itd1000_read_reg(state, BBGVMIN) & 0xf0;
	u8 bw      = itd1000_read_reg(state, BW)      & 0xf0;

	itd_dbg("symbol_rate = %d\n", symbol_rate);

	/* not sure what is that ? - starting to download the table */
	itd1000_write_reg(state, CON1, con1 | (1 << 1));

	for (i = 0; i < ARRAY_SIZE(itd1000_lpf_pga); i++)
		if (symbol_rate < itd1000_lpf_pga[i].symbol_rate) {
			itd_dbg("symrate: index: %d pgaext: %x, bbgvmin: %x\n", i, itd1000_lpf_pga[i].pgaext, itd1000_lpf_pga[i].bbgvmin);
			itd1000_write_reg(state, PLLFH,   pllfh | (itd1000_lpf_pga[i].pgaext << 4));
			itd1000_write_reg(state, BBGVMIN, bbgvmin | (itd1000_lpf_pga[i].bbgvmin));
			itd1000_write_reg(state, BW,      bw | (i & 0x0f));
			break;
		}

	itd1000_write_reg(state, CON1, con1 | (0 << 1));
}

static struct {
	u8 vcorg;
	u32 fmax_rg;
} itd1000_vcorg[] = {
	{  1,  920000 },
	{  2,  971000 },
	{  3, 1031000 },
	{  4, 1091000 },
	{  5, 1171000 },
	{  6, 1281000 },
	{  7, 1381000 },
	{  8,  500000 },	/* this is intentional. */
	{  9, 1451000 },
	{ 10, 1531000 },
	{ 11, 1631000 },
	{ 12, 1741000 },
	{ 13, 1891000 },
	{ 14, 2071000 },
	{ 15, 2250000 },
};

static void itd1000_set_vco(struct itd1000_state *state, u32 freq_khz)
{
	u8 i;
	u8 gvbb_i2c     = itd1000_read_reg(state, GVBB_I2C) & 0xbf;
	u8 vco_chp1_i2c = itd1000_read_reg(state, VCO_CHP1_I2C) & 0x0f;
	u8 adcout;

	/* reserved bit again (reset ?) */
	itd1000_write_reg(state, GVBB_I2C, gvbb_i2c | (1 << 6));

	for (i = 0; i < ARRAY_SIZE(itd1000_vcorg); i++) {
		if (freq_khz < itd1000_vcorg[i].fmax_rg) {
			itd1000_write_reg(state, VCO_CHP1_I2C, vco_chp1_i2c | (itd1000_vcorg[i].vcorg << 4));
			msleep(1);

			adcout = itd1000_read_reg(state, PLLLOCK) & 0x0f;

			itd_dbg("VCO: %dkHz: %d -> ADCOUT: %d %02x\n", freq_khz, itd1000_vcorg[i].vcorg, adcout, vco_chp1_i2c);

			if (adcout > 13) {
				if (!(itd1000_vcorg[i].vcorg == 7 || itd1000_vcorg[i].vcorg == 15))
					itd1000_write_reg(state, VCO_CHP1_I2C, vco_chp1_i2c | ((itd1000_vcorg[i].vcorg + 1) << 4));
			} else if (adcout < 2) {
				if (!(itd1000_vcorg[i].vcorg == 1 || itd1000_vcorg[i].vcorg == 9))
					itd1000_write_reg(state, VCO_CHP1_I2C, vco_chp1_i2c | ((itd1000_vcorg[i].vcorg - 1) << 4));
			}
			break;
		}
	}
}

static const struct {
	u32 freq;
	u8 values[10]; /* RFTR, RFST1 - RFST9 */
} itd1000_fre_values[] = {
	{ 1075000, { 0x59, 0x1d, 0x1c, 0x17, 0x16, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } },
	{ 1250000, { 0x89, 0x1e, 0x1d, 0x17, 0x15, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } },
	{ 1450000, { 0x89, 0x1e, 0x1d, 0x17, 0x15, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } },
	{ 1650000, { 0x69, 0x1e, 0x1d, 0x17, 0x15, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } },
	{ 1750000, { 0x69, 0x1e, 0x17, 0x15, 0x14, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } },
	{ 1850000, { 0x69, 0x1d, 0x17, 0x16, 0x14, 0x0f, 0x0e, 0x0d, 0x0b, 0x0a } },
	{ 1900000, { 0x69, 0x1d, 0x17, 0x15, 0x14, 0x0f, 0x0e, 0x0d, 0x0b, 0x0a } },
	{ 1950000, { 0x69, 0x1d, 0x17, 0x16, 0x14, 0x13, 0x0e, 0x0d, 0x0b, 0x0a } },
	{ 2050000, { 0x69, 0x1e, 0x1d, 0x17, 0x16, 0x14, 0x13, 0x0e, 0x0b, 0x0a } },
	{ 2150000, { 0x69, 0x1d, 0x1c, 0x17, 0x15, 0x14, 0x13, 0x0f, 0x0e, 0x0b } }
};


#define FREF 16

static void itd1000_set_lo(struct itd1000_state *state, u32 freq_khz)
{
	int i, j;
	u32 plln, pllf;
	u64 tmp;

	plln = (freq_khz * 1000) / 2 / FREF;

	/* Compute the factional part times 1000 */
	tmp  = plln % 1000000;
	plln /= 1000000;

	tmp *= 1048576;
	do_div(tmp, 1000000);
	pllf = (u32) tmp;

	state->frequency = ((plln * 1000) + (pllf * 1000)/1048576) * 2*FREF;
	itd_dbg("frequency: %dkHz (wanted) %dkHz (set), PLLF = %d, PLLN = %d\n", freq_khz, state->frequency, pllf, plln);

	itd1000_write_reg(state, PLLNH, 0x80); /* PLLNH */
	itd1000_write_reg(state, PLLNL, plln & 0xff);
	itd1000_write_reg(state, PLLFH, (itd1000_read_reg(state, PLLFH) & 0xf0) | ((pllf >> 16) & 0x0f));
	itd1000_write_reg(state, PLLFM, (pllf >> 8) & 0xff);
	itd1000_write_reg(state, PLLFL, (pllf >> 0) & 0xff);

	for (i = 0; i < ARRAY_SIZE(itd1000_fre_values); i++) {
		if (freq_khz <= itd1000_fre_values[i].freq) {
			itd_dbg("fre_values: %d\n", i);
			itd1000_write_reg(state, RFTR, itd1000_fre_values[i].values[0]);
			for (j = 0; j < 9; j++)
				itd1000_write_reg(state, RFST1+j, itd1000_fre_values[i].values[j+1]);
			break;
		}
	}

	itd1000_set_vco(state, freq_khz);
}

static int itd1000_set_parameters(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	struct itd1000_state *state = fe->tuner_priv;
	u8 pllcon1;

	itd1000_set_lo(state, c->frequency);
	itd1000_set_lpf_bw(state, c->symbol_rate);

	pllcon1 = itd1000_read_reg(state, PLLCON1) & 0x7f;
	itd1000_write_reg(state, PLLCON1, pllcon1 | (1 << 7));
	itd1000_write_reg(state, PLLCON1, pllcon1);

	return 0;
}

static int itd1000_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct itd1000_state *state = fe->tuner_priv;
	*frequency = state->frequency;
	return 0;
}

static int itd1000_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
	return 0;
}

static u8 itd1000_init_tab[][2] = {
	{ PLLCON1,       0x65 }, /* Register does not change */
	{ PLLNH,         0x80 }, /* Bits [7:6] do not change */
	{ RESERVED_0X6D, 0x3b },
	{ VCO_CHP2_I2C,  0x12 },
	{ 0x72,          0xf9 }, /* No such regsister defined */
	{ RESERVED_0X73, 0xff },
	{ RESERVED_0X74, 0xb2 },
	{ RESERVED_0X75, 0xc7 },
	{ EXTGVBBRF,     0xf0 },
	{ DIVAGCCK,      0x80 },
	{ BBTR,          0xa0 },
	{ RESERVED_0X7E, 0x4f },
	{ 0x82,          0x88 }, /* No such regsister defined */
	{ 0x83,          0x80 }, /* No such regsister defined */
	{ 0x84,          0x80 }, /* No such regsister defined */
	{ RESERVED_0X85, 0x74 },
	{ RESERVED_0X86, 0xff },
	{ RESERVED_0X88, 0x02 },
	{ RESERVED_0X89, 0x16 },
	{ RFST0,         0x1f },
	{ RESERVED_0X94, 0x66 },
	{ RESERVED_0X95, 0x66 },
	{ RESERVED_0X96, 0x77 },
	{ RESERVED_0X97, 0x99 },
	{ RESERVED_0X98, 0xff },
	{ RESERVED_0X99, 0xfc },
	{ RESERVED_0X9A, 0xba },
	{ RESERVED_0X9B, 0xaa },
};

static u8 itd1000_reinit_tab[][2] = {
	{ VCO_CHP1_I2C, 0x8a },
	{ BW,           0x87 },
	{ GVBB_I2C,     0x03 },
	{ BBGVMIN,      0x03 },
	{ CON1,         0x2e },
};


static int itd1000_init(struct dvb_frontend *fe)
{
	struct itd1000_state *state = fe->tuner_priv;
	int i;

	for (i = 0; i < ARRAY_SIZE(itd1000_init_tab); i++)
		itd1000_write_reg(state, itd1000_init_tab[i][0], itd1000_init_tab[i][1]);

	for (i = 0; i < ARRAY_SIZE(itd1000_reinit_tab); i++)
		itd1000_write_reg(state, itd1000_reinit_tab[i][0], itd1000_reinit_tab[i][1]);

	return 0;
}

static int itd1000_sleep(struct dvb_frontend *fe)
{
	return 0;
}

static int itd1000_release(struct dvb_frontend *fe)
{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
	return 0;
}

static const struct dvb_tuner_ops itd1000_tuner_ops = {
	.info = {
		.name           = "Integrant ITD1000",
		.frequency_min  = 950000,
		.frequency_max  = 2150000,
		.frequency_step = 125,     /* kHz for QPSK frontends */
	},

	.release       = itd1000_release,

	.init          = itd1000_init,
	.sleep         = itd1000_sleep,

	.set_params    = itd1000_set_parameters,
	.get_frequency = itd1000_get_frequency,
	.get_bandwidth = itd1000_get_bandwidth
};


struct dvb_frontend *itd1000_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct itd1000_config *cfg)
{
	struct itd1000_state *state = NULL;
	u8 i = 0;

	state = kzalloc(sizeof(struct itd1000_state), GFP_KERNEL);
	if (state == NULL)
		return NULL;

	state->cfg = cfg;
	state->i2c = i2c;

	i = itd1000_read_reg(state, 0);
	if (i != 0) {
		kfree(state);
		return NULL;
	}
	itd_info("successfully identified (ID: %d)\n", i);

	memset(state->shadow, 0xff, sizeof(state->shadow));
	for (i = 0x65; i < 0x9c; i++)
		state->shadow[i] = itd1000_read_reg(state, i);

	memcpy(&fe->ops.tuner_ops, &itd1000_tuner_ops, sizeof(struct dvb_tuner_ops));

	fe->tuner_priv = state;

	return fe;
}
EXPORT_SYMBOL(itd1000_attach);

MODULE_AUTHOR("Patrick Boettcher <pb@linuxtv.org>");
MODULE_DESCRIPTION("Integrant ITD1000 driver");
MODULE_LICENSE("GPL");