tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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_c(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;
30 u8 buf[2];
31 u16 if_ctl;
32 u64 num;
33 struct reg_val_mask tab[] = {
34 { 0x00080, 0x01, 0xff },
35 { 0x00081, 0x05, 0xff },
36 { 0x00085, 0x07, 0xff },
37 { 0x00088, 0x01, 0xff },
38
39 { 0x00082, 0x20, 0x60 },
40 { 0x1016a, 0x48, 0xff },
41 { 0x100a5, 0x00, 0x01 },
42 { 0x10020, 0x06, 0x07 },
43 { 0x10059, 0x50, 0xff },
44 { 0x10087, 0x0c, 0x3c },
45 { 0x1008b, 0x07, 0xff },
46 { 0x1001f, priv->cfg.if_agc_polarity << 7, 0x80 },
47 { 0x10070, priv->cfg.ts_mode, 0xff },
48 };
49
50 dbg("%s: RF=%d SR=%d", __func__, c->frequency, c->symbol_rate);
51
52 /* update GPIOs */
53 ret = cxd2820r_gpio(fe);
54 if (ret)
55 goto error;
56
57 /* program tuner */
58 if (fe->ops.tuner_ops.set_params)
59 fe->ops.tuner_ops.set_params(fe, params);
60
61 if (priv->delivery_system != SYS_DVBC_ANNEX_AC) {
62 for (i = 0; i < ARRAY_SIZE(tab); i++) {
63 ret = cxd2820r_wr_reg_mask(priv, tab[i].reg,
64 tab[i].val, tab[i].mask);
65 if (ret)
66 goto error;
67 }
68 }
69
70 priv->delivery_system = SYS_DVBC_ANNEX_AC;
71 priv->ber_running = 0; /* tune stops BER counter */
72
73 num = priv->cfg.if_dvbc;
74 num *= 0x4000;
75 if_ctl = cxd2820r_div_u64_round_closest(num, 41000);
76 buf[0] = (if_ctl >> 8) & 0x3f;
77 buf[1] = (if_ctl >> 0) & 0xff;
78
79 ret = cxd2820r_wr_regs(priv, 0x10042, buf, 2);
80 if (ret)
81 goto error;
82
83 ret = cxd2820r_wr_reg(priv, 0x000ff, 0x08);
84 if (ret)
85 goto error;
86
87 ret = cxd2820r_wr_reg(priv, 0x000fe, 0x01);
88 if (ret)
89 goto error;
90
91 return ret;
92error:
93 dbg("%s: failed:%d", __func__, ret);
94 return ret;
95}
96
97int cxd2820r_get_frontend_c(struct dvb_frontend *fe,
98 struct dvb_frontend_parameters *p)
99{
100 struct cxd2820r_priv *priv = fe->demodulator_priv;
101 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
102 int ret;
103 u8 buf[2];
104
105 ret = cxd2820r_rd_regs(priv, 0x1001a, buf, 2);
106 if (ret)
107 goto error;
108
109 c->symbol_rate = 2500 * ((buf[0] & 0x0f) << 8 | buf[1]);
110
111 ret = cxd2820r_rd_reg(priv, 0x10019, &buf[0]);
112 if (ret)
113 goto error;
114
115 switch ((buf[0] >> 0) & 0x03) {
116 case 0:
117 c->modulation = QAM_16;
118 break;
119 case 1:
120 c->modulation = QAM_32;
121 break;
122 case 2:
123 c->modulation = QAM_64;
124 break;
125 case 3:
126 c->modulation = QAM_128;
127 break;
128 case 4:
129 c->modulation = QAM_256;
130 break;
131 }
132
133 switch ((buf[0] >> 7) & 0x01) {
134 case 0:
135 c->inversion = INVERSION_OFF;
136 break;
137 case 1:
138 c->inversion = INVERSION_ON;
139 break;
140 }
141
142 return ret;
143error:
144 dbg("%s: failed:%d", __func__, ret);
145 return ret;
146}
147
148int cxd2820r_read_ber_c(struct dvb_frontend *fe, u32 *ber)
149{
150 struct cxd2820r_priv *priv = fe->demodulator_priv;
151 int ret;
152 u8 buf[3], start_ber = 0;
153 *ber = 0;
154
155 if (priv->ber_running) {
156 ret = cxd2820r_rd_regs(priv, 0x10076, buf, sizeof(buf));
157 if (ret)
158 goto error;
159
160 if ((buf[2] >> 7) & 0x01 || (buf[2] >> 4) & 0x01) {
161 *ber = (buf[2] & 0x0f) << 16 | buf[1] << 8 | buf[0];
162 start_ber = 1;
163 }
164 } else {
165 priv->ber_running = 1;
166 start_ber = 1;
167 }
168
169 if (start_ber) {
170 /* (re)start BER */
171 ret = cxd2820r_wr_reg(priv, 0x10079, 0x01);
172 if (ret)
173 goto error;
174 }
175
176 return ret;
177error:
178 dbg("%s: failed:%d", __func__, ret);
179 return ret;
180}
181
182int cxd2820r_read_signal_strength_c(struct dvb_frontend *fe,
183 u16 *strength)
184{
185 struct cxd2820r_priv *priv = fe->demodulator_priv;
186 int ret;
187 u8 buf[2];
188 u16 tmp;
189
190 ret = cxd2820r_rd_regs(priv, 0x10049, buf, sizeof(buf));
191 if (ret)
192 goto error;
193
194 tmp = (buf[0] & 0x03) << 8 | buf[1];
195 tmp = (~tmp & 0x03ff);
196
197 if (tmp == 512)
198 /* ~no signal */
199 tmp = 0;
200 else if (tmp > 350)
201 tmp = 350;
202
203 /* scale value to 0x0000-0xffff */
204 *strength = tmp * 0xffff / (350-0);
205
206 return ret;
207error:
208 dbg("%s: failed:%d", __func__, ret);
209 return ret;
210}
211
212int cxd2820r_read_snr_c(struct dvb_frontend *fe, u16 *snr)
213{
214 struct cxd2820r_priv *priv = fe->demodulator_priv;
215 int ret;
216 u8 tmp;
217 unsigned int A, B;
218 /* report SNR in dB * 10 */
219
220 ret = cxd2820r_rd_reg(priv, 0x10019, &tmp);
221 if (ret)
222 goto error;
223
224 if (((tmp >> 0) & 0x03) % 2) {
225 A = 875;
226 B = 650;
227 } else {
228 A = 950;
229 B = 760;
230 }
231
232 ret = cxd2820r_rd_reg(priv, 0x1004d, &tmp);
233 if (ret)
234 goto error;
235
236 #define CXD2820R_LOG2_E_24 24204406 /* log2(e) << 24 */
237 if (tmp)
238 *snr = A * (intlog2(B / tmp) >> 5) / (CXD2820R_LOG2_E_24 >> 5)
239 / 10;
240 else
241 *snr = 0;
242
243 return ret;
244error:
245 dbg("%s: failed:%d", __func__, ret);
246 return ret;
247}
248
249int cxd2820r_read_ucblocks_c(struct dvb_frontend *fe, u32 *ucblocks)
250{
251 *ucblocks = 0;
252 /* no way to read ? */
253 return 0;
254}
255
256int cxd2820r_read_status_c(struct dvb_frontend *fe, fe_status_t *status)
257{
258 struct cxd2820r_priv *priv = fe->demodulator_priv;
259 int ret;
260 u8 buf[2];
261 *status = 0;
262
263 ret = cxd2820r_rd_regs(priv, 0x10088, buf, sizeof(buf));
264 if (ret)
265 goto error;
266
267 if (((buf[0] >> 0) & 0x01) == 1) {
268 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
269 FE_HAS_VITERBI | FE_HAS_SYNC;
270
271 if (((buf[1] >> 3) & 0x01) == 1) {
272 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
273 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
274 }
275 }
276
277 dbg("%s: lock=%02x %02x", __func__, buf[0], buf[1]);
278
279 return ret;
280error:
281 dbg("%s: failed:%d", __func__, ret);
282 return ret;
283}
284
285int cxd2820r_init_c(struct dvb_frontend *fe)
286{
287 struct cxd2820r_priv *priv = fe->demodulator_priv;
288 int ret;
289
290 ret = cxd2820r_wr_reg(priv, 0x00085, 0x07);
291 if (ret)
292 goto error;
293
294 return ret;
295error:
296 dbg("%s: failed:%d", __func__, ret);
297 return ret;
298}
299
300int cxd2820r_sleep_c(struct dvb_frontend *fe)
301{
302 struct cxd2820r_priv *priv = fe->demodulator_priv;
303 int ret, i;
304 struct reg_val_mask tab[] = {
305 { 0x000ff, 0x1f, 0xff },
306 { 0x00085, 0x00, 0xff },
307 { 0x00088, 0x01, 0xff },
308 { 0x00081, 0x00, 0xff },
309 { 0x00080, 0x00, 0xff },
310 };
311
312 dbg("%s", __func__);
313
314 priv->delivery_system = SYS_UNDEFINED;
315
316 for (i = 0; i < ARRAY_SIZE(tab); i++) {
317 ret = cxd2820r_wr_reg_mask(priv, tab[i].reg, tab[i].val,
318 tab[i].mask);
319 if (ret)
320 goto error;
321 }
322
323 return ret;
324error:
325 dbg("%s: failed:%d", __func__, ret);
326 return ret;
327}
328
329int cxd2820r_get_tune_settings_c(struct dvb_frontend *fe,
330 struct dvb_frontend_tune_settings *s)
331{
332 s->min_delay_ms = 500;
333 s->step_size = 0; /* no zigzag */
334 s->max_drift = 0;
335
336 return 0;
337}
338