cxd2820r_t2.c revision 14d24d148c7521b2b88b396652e36f55d061e195 
1/*
2 * Sony CXD2820R demodulator driver
3 *
4 * Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
5 *
6 *    This program is free software; you can redistribute it and/or modify
7 *    it under the terms of the GNU General Public License as published by
8 *    the Free Software Foundation; either version 2 of the License, or
9 *    (at your option) any later version.
10 *
11 *    This program is distributed in the hope that it will be useful,
12 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
13 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 *    GNU General Public License for more details.
15 *
16 *    You should have received a copy of the GNU General Public License along
17 *    with this program; if not, write to the Free Software Foundation, Inc.,
18 *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21
22#include "cxd2820r_priv.h"
23
24int cxd2820r_set_frontend_t2(struct dvb_frontend *fe,
25			     struct dvb_frontend_parameters *params)
26{
27	struct cxd2820r_priv *priv = fe->demodulator_priv;
28	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
29	int ret, i, bw_i;
30	u32 if_freq, if_ctl;
31	u64 num;
32	u8 buf[3], bw_param;
33	u8 bw_params1[][5] = {
34		{ 0x1c, 0xb3, 0x33, 0x33, 0x33 }, /* 5 MHz */
35		{ 0x17, 0xea, 0xaa, 0xaa, 0xaa }, /* 6 MHz */
36		{ 0x14, 0x80, 0x00, 0x00, 0x00 }, /* 7 MHz */
37		{ 0x11, 0xf0, 0x00, 0x00, 0x00 }, /* 8 MHz */
38	};
39	struct reg_val_mask tab[] = {
40		{ 0x00080, 0x02, 0xff },
41		{ 0x00081, 0x20, 0xff },
42		{ 0x00085, 0x07, 0xff },
43		{ 0x00088, 0x01, 0xff },
44		{ 0x02069, 0x01, 0xff },
45
46		{ 0x0207f, 0x2a, 0xff },
47		{ 0x02082, 0x0a, 0xff },
48		{ 0x02083, 0x0a, 0xff },
49		{ 0x020cb, priv->cfg.if_agc_polarity << 6, 0x40 },
50		{ 0x02070, priv->cfg.ts_mode, 0xff },
51		{ 0x020b5, priv->cfg.spec_inv << 4, 0x10 },
52		{ 0x02567, 0x07, 0x0f },
53		{ 0x02569, 0x03, 0x03 },
54		{ 0x02595, 0x1a, 0xff },
55		{ 0x02596, 0x50, 0xff },
56		{ 0x02a8c, 0x00, 0xff },
57		{ 0x02a8d, 0x34, 0xff },
58		{ 0x02a45, 0x06, 0x07 },
59		{ 0x03f10, 0x0d, 0xff },
60		{ 0x03f11, 0x02, 0xff },
61		{ 0x03f12, 0x01, 0xff },
62		{ 0x03f23, 0x2c, 0xff },
63		{ 0x03f51, 0x13, 0xff },
64		{ 0x03f52, 0x01, 0xff },
65		{ 0x03f53, 0x00, 0xff },
66		{ 0x027e6, 0x14, 0xff },
67		{ 0x02786, 0x02, 0x07 },
68		{ 0x02787, 0x40, 0xe0 },
69		{ 0x027ef, 0x10, 0x18 },
70	};
71
72	dbg("%s: RF=%d BW=%d", __func__, c->frequency, c->bandwidth_hz);
73
74	switch (c->bandwidth_hz) {
75	case 5000000:
76		bw_i = 0;
77		bw_param = 3;
78		break;
79	case 6000000:
80		bw_i = 1;
81		bw_param = 2;
82		break;
83	case 7000000:
84		bw_i = 2;
85		bw_param = 1;
86		break;
87	case 8000000:
88		bw_i = 3;
89		bw_param = 0;
90		break;
91	default:
92		return -EINVAL;
93	}
94
95	/* update GPIOs */
96	ret = cxd2820r_gpio(fe);
97	if (ret)
98		goto error;
99
100	/* program tuner */
101	if (fe->ops.tuner_ops.set_params)
102		fe->ops.tuner_ops.set_params(fe);
103
104	if (priv->delivery_system != SYS_DVBT2) {
105		for (i = 0; i < ARRAY_SIZE(tab); i++) {
106			ret = cxd2820r_wr_reg_mask(priv, tab[i].reg,
107				tab[i].val, tab[i].mask);
108			if (ret)
109				goto error;
110		}
111	}
112
113	priv->delivery_system = SYS_DVBT2;
114
115	/* program IF frequency */
116	if (fe->ops.tuner_ops.get_if_frequency) {
117		ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
118		if (ret)
119			goto error;
120	} else
121		if_freq = 0;
122
123	dbg("%s: if_freq=%d", __func__, if_freq);
124
125	num = if_freq / 1000; /* Hz => kHz */
126	num *= 0x1000000;
127	if_ctl = cxd2820r_div_u64_round_closest(num, 41000);
128	buf[0] = ((if_ctl >> 16) & 0xff);
129	buf[1] = ((if_ctl >>  8) & 0xff);
130	buf[2] = ((if_ctl >>  0) & 0xff);
131
132	ret = cxd2820r_wr_regs(priv, 0x020b6, buf, 3);
133	if (ret)
134		goto error;
135
136	ret = cxd2820r_wr_regs(priv, 0x0209f, bw_params1[bw_i], 5);
137	if (ret)
138		goto error;
139
140	ret = cxd2820r_wr_reg_mask(priv, 0x020d7, bw_param << 6, 0xc0);
141	if (ret)
142		goto error;
143
144	ret = cxd2820r_wr_reg(priv, 0x000ff, 0x08);
145	if (ret)
146		goto error;
147
148	ret = cxd2820r_wr_reg(priv, 0x000fe, 0x01);
149	if (ret)
150		goto error;
151
152	return ret;
153error:
154	dbg("%s: failed:%d", __func__, ret);
155	return ret;
156
157}
158
159int cxd2820r_get_frontend_t2(struct dvb_frontend *fe,
160	struct dvb_frontend_parameters *p)
161{
162	struct cxd2820r_priv *priv = fe->demodulator_priv;
163	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
164	int ret;
165	u8 buf[2];
166
167	ret = cxd2820r_rd_regs(priv, 0x0205c, buf, 2);
168	if (ret)
169		goto error;
170
171	switch ((buf[0] >> 0) & 0x07) {
172	case 0:
173		c->transmission_mode = TRANSMISSION_MODE_2K;
174		break;
175	case 1:
176		c->transmission_mode = TRANSMISSION_MODE_8K;
177		break;
178	case 2:
179		c->transmission_mode = TRANSMISSION_MODE_4K;
180		break;
181	case 3:
182		c->transmission_mode = TRANSMISSION_MODE_1K;
183		break;
184	case 4:
185		c->transmission_mode = TRANSMISSION_MODE_16K;
186		break;
187	case 5:
188		c->transmission_mode = TRANSMISSION_MODE_32K;
189		break;
190	}
191
192	switch ((buf[1] >> 4) & 0x07) {
193	case 0:
194		c->guard_interval = GUARD_INTERVAL_1_32;
195		break;
196	case 1:
197		c->guard_interval = GUARD_INTERVAL_1_16;
198		break;
199	case 2:
200		c->guard_interval = GUARD_INTERVAL_1_8;
201		break;
202	case 3:
203		c->guard_interval = GUARD_INTERVAL_1_4;
204		break;
205	case 4:
206		c->guard_interval = GUARD_INTERVAL_1_128;
207		break;
208	case 5:
209		c->guard_interval = GUARD_INTERVAL_19_128;
210		break;
211	case 6:
212		c->guard_interval = GUARD_INTERVAL_19_256;
213		break;
214	}
215
216	ret = cxd2820r_rd_regs(priv, 0x0225b, buf, 2);
217	if (ret)
218		goto error;
219
220	switch ((buf[0] >> 0) & 0x07) {
221	case 0:
222		c->fec_inner = FEC_1_2;
223		break;
224	case 1:
225		c->fec_inner = FEC_3_5;
226		break;
227	case 2:
228		c->fec_inner = FEC_2_3;
229		break;
230	case 3:
231		c->fec_inner = FEC_3_4;
232		break;
233	case 4:
234		c->fec_inner = FEC_4_5;
235		break;
236	case 5:
237		c->fec_inner = FEC_5_6;
238		break;
239	}
240
241	switch ((buf[1] >> 0) & 0x07) {
242	case 0:
243		c->modulation = QPSK;
244		break;
245	case 1:
246		c->modulation = QAM_16;
247		break;
248	case 2:
249		c->modulation = QAM_64;
250		break;
251	case 3:
252		c->modulation = QAM_256;
253		break;
254	}
255
256	ret = cxd2820r_rd_reg(priv, 0x020b5, &buf[0]);
257	if (ret)
258		goto error;
259
260	switch ((buf[0] >> 4) & 0x01) {
261	case 0:
262		c->inversion = INVERSION_OFF;
263		break;
264	case 1:
265		c->inversion = INVERSION_ON;
266		break;
267	}
268
269	return ret;
270error:
271	dbg("%s: failed:%d", __func__, ret);
272	return ret;
273}
274
275int cxd2820r_read_status_t2(struct dvb_frontend *fe, fe_status_t *status)
276{
277	struct cxd2820r_priv *priv = fe->demodulator_priv;
278	int ret;
279	u8 buf[1];
280	*status = 0;
281
282	ret = cxd2820r_rd_reg(priv, 0x02010 , &buf[0]);
283	if (ret)
284		goto error;
285
286	if ((buf[0] & 0x07) == 6) {
287		if (((buf[0] >> 5) & 0x01) == 1) {
288			*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
289				FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
290		} else {
291			*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
292				FE_HAS_VITERBI | FE_HAS_SYNC;
293		}
294	}
295
296	dbg("%s: lock=%02x", __func__, buf[0]);
297
298	return ret;
299error:
300	dbg("%s: failed:%d", __func__, ret);
301	return ret;
302}
303
304int cxd2820r_read_ber_t2(struct dvb_frontend *fe, u32 *ber)
305{
306	struct cxd2820r_priv *priv = fe->demodulator_priv;
307	int ret;
308	u8 buf[4];
309	unsigned int errbits;
310	*ber = 0;
311	/* FIXME: correct calculation */
312
313	ret = cxd2820r_rd_regs(priv, 0x02039, buf, sizeof(buf));
314	if (ret)
315		goto error;
316
317	if ((buf[0] >> 4) & 0x01) {
318		errbits = (buf[0] & 0x0f) << 24 | buf[1] << 16 |
319			buf[2] << 8 | buf[3];
320
321		if (errbits)
322			*ber = errbits * 64 / 16588800;
323	}
324
325	return ret;
326error:
327	dbg("%s: failed:%d", __func__, ret);
328	return ret;
329}
330
331int cxd2820r_read_signal_strength_t2(struct dvb_frontend *fe,
332	u16 *strength)
333{
334	struct cxd2820r_priv *priv = fe->demodulator_priv;
335	int ret;
336	u8 buf[2];
337	u16 tmp;
338
339	ret = cxd2820r_rd_regs(priv, 0x02026, buf, sizeof(buf));
340	if (ret)
341		goto error;
342
343	tmp = (buf[0] & 0x0f) << 8 | buf[1];
344	tmp = ~tmp & 0x0fff;
345
346	/* scale value to 0x0000-0xffff from 0x0000-0x0fff */
347	*strength = tmp * 0xffff / 0x0fff;
348
349	return ret;
350error:
351	dbg("%s: failed:%d", __func__, ret);
352	return ret;
353}
354
355int cxd2820r_read_snr_t2(struct dvb_frontend *fe, u16 *snr)
356{
357	struct cxd2820r_priv *priv = fe->demodulator_priv;
358	int ret;
359	u8 buf[2];
360	u16 tmp;
361	/* report SNR in dB * 10 */
362
363	ret = cxd2820r_rd_regs(priv, 0x02028, buf, sizeof(buf));
364	if (ret)
365		goto error;
366
367	tmp = (buf[0] & 0x0f) << 8 | buf[1];
368	#define CXD2820R_LOG10_8_24 15151336 /* log10(8) << 24 */
369	if (tmp)
370		*snr = (intlog10(tmp) - CXD2820R_LOG10_8_24) / ((1 << 24)
371			/ 100);
372	else
373		*snr = 0;
374
375	dbg("%s: dBx10=%d val=%04x", __func__, *snr, tmp);
376
377	return ret;
378error:
379	dbg("%s: failed:%d", __func__, ret);
380	return ret;
381}
382
383int cxd2820r_read_ucblocks_t2(struct dvb_frontend *fe, u32 *ucblocks)
384{
385	*ucblocks = 0;
386	/* no way to read ? */
387	return 0;
388}
389
390int cxd2820r_sleep_t2(struct dvb_frontend *fe)
391{
392	struct cxd2820r_priv *priv = fe->demodulator_priv;
393	int ret, i;
394	struct reg_val_mask tab[] = {
395		{ 0x000ff, 0x1f, 0xff },
396		{ 0x00085, 0x00, 0xff },
397		{ 0x00088, 0x01, 0xff },
398		{ 0x02069, 0x00, 0xff },
399		{ 0x00081, 0x00, 0xff },
400		{ 0x00080, 0x00, 0xff },
401	};
402
403	dbg("%s", __func__);
404
405	for (i = 0; i < ARRAY_SIZE(tab); i++) {
406		ret = cxd2820r_wr_reg_mask(priv, tab[i].reg, tab[i].val,
407			tab[i].mask);
408		if (ret)
409			goto error;
410	}
411
412	priv->delivery_system = SYS_UNDEFINED;
413
414	return ret;
415error:
416	dbg("%s: failed:%d", __func__, ret);
417	return ret;
418}
419
420int cxd2820r_get_tune_settings_t2(struct dvb_frontend *fe,
421	struct dvb_frontend_tune_settings *s)
422{
423	s->min_delay_ms = 1500;
424	s->step_size = fe->ops.info.frequency_stepsize * 2;
425	s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
426
427	return 0;
428}
429