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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // | |
3 | // Socionext MN88443x series demodulator driver for ISDB-S/ISDB-T. | |
4 | // | |
5 | // Copyright (c) 2018 Socionext Inc. | |
6 | ||
7 | #include <linux/bitfield.h> | |
8 | #include <linux/clk.h> | |
9 | #include <linux/delay.h> | |
10 | #include <linux/gpio/consumer.h> | |
11 | #include <linux/of_device.h> | |
12 | #include <linux/regmap.h> | |
13 | #include <media/dvb_math.h> | |
14 | ||
15 | #include "mn88443x.h" | |
16 | ||
17 | /* ISDB-S registers */ | |
18 | #define ATSIDU_S 0x2f | |
19 | #define ATSIDL_S 0x30 | |
20 | #define TSSET_S 0x31 | |
21 | #define AGCREAD_S 0x5a | |
22 | #define CPMON1_S 0x5e | |
23 | #define CPMON1_S_FSYNC BIT(5) | |
24 | #define CPMON1_S_ERRMON BIT(4) | |
25 | #define CPMON1_S_SIGOFF BIT(3) | |
26 | #define CPMON1_S_W2LOCK BIT(2) | |
27 | #define CPMON1_S_W1LOCK BIT(1) | |
28 | #define CPMON1_S_DW1LOCK BIT(0) | |
29 | #define TRMON_S 0x60 | |
30 | #define BERCNFLG_S 0x68 | |
31 | #define BERCNFLG_S_BERVRDY BIT(5) | |
32 | #define BERCNFLG_S_BERVCHK BIT(4) | |
33 | #define BERCNFLG_S_BERDRDY BIT(3) | |
34 | #define BERCNFLG_S_BERDCHK BIT(2) | |
35 | #define CNRDXU_S 0x69 | |
36 | #define CNRDXL_S 0x6a | |
37 | #define CNRDYU_S 0x6b | |
38 | #define CNRDYL_S 0x6c | |
39 | #define BERVRDU_S 0x71 | |
40 | #define BERVRDL_S 0x72 | |
41 | #define DOSET1_S 0x73 | |
42 | ||
43 | /* Primary ISDB-T */ | |
44 | #define PLLASET1 0x00 | |
45 | #define PLLASET2 0x01 | |
46 | #define PLLBSET1 0x02 | |
47 | #define PLLBSET2 0x03 | |
48 | #define PLLSET 0x04 | |
49 | #define OUTCSET 0x08 | |
50 | #define OUTCSET_CHDRV_8MA 0xff | |
51 | #define OUTCSET_CHDRV_4MA 0x00 | |
52 | #define PLDWSET 0x09 | |
53 | #define PLDWSET_NORMAL 0x00 | |
54 | #define PLDWSET_PULLDOWN 0xff | |
55 | #define HIZSET1 0x0a | |
56 | #define HIZSET2 0x0b | |
57 | ||
58 | /* Secondary ISDB-T (for MN884434 only) */ | |
59 | #define RCVSET 0x00 | |
60 | #define TSSET1_M 0x01 | |
61 | #define TSSET2_M 0x02 | |
62 | #define TSSET3_M 0x03 | |
63 | #define INTACSET 0x08 | |
64 | #define HIZSET3 0x0b | |
65 | ||
66 | /* ISDB-T registers */ | |
67 | #define TSSET1 0x05 | |
68 | #define TSSET1_TSASEL_MASK GENMASK(4, 3) | |
69 | #define TSSET1_TSASEL_ISDBT (0x0 << 3) | |
70 | #define TSSET1_TSASEL_ISDBS (0x1 << 3) | |
71 | #define TSSET1_TSASEL_NONE (0x2 << 3) | |
72 | #define TSSET1_TSBSEL_MASK GENMASK(2, 1) | |
73 | #define TSSET1_TSBSEL_ISDBS (0x0 << 1) | |
74 | #define TSSET1_TSBSEL_ISDBT (0x1 << 1) | |
75 | #define TSSET1_TSBSEL_NONE (0x2 << 1) | |
76 | #define TSSET2 0x06 | |
77 | #define TSSET3 0x07 | |
78 | #define TSSET3_INTASEL_MASK GENMASK(7, 6) | |
79 | #define TSSET3_INTASEL_T (0x0 << 6) | |
80 | #define TSSET3_INTASEL_S (0x1 << 6) | |
81 | #define TSSET3_INTASEL_NONE (0x2 << 6) | |
82 | #define TSSET3_INTBSEL_MASK GENMASK(5, 4) | |
83 | #define TSSET3_INTBSEL_S (0x0 << 4) | |
84 | #define TSSET3_INTBSEL_T (0x1 << 4) | |
85 | #define TSSET3_INTBSEL_NONE (0x2 << 4) | |
86 | #define OUTSET2 0x0d | |
87 | #define PWDSET 0x0f | |
88 | #define PWDSET_OFDMPD_MASK GENMASK(3, 2) | |
89 | #define PWDSET_OFDMPD_DOWN BIT(3) | |
90 | #define PWDSET_PSKPD_MASK GENMASK(1, 0) | |
91 | #define PWDSET_PSKPD_DOWN BIT(1) | |
92 | #define CLKSET1_T 0x11 | |
93 | #define MDSET_T 0x13 | |
94 | #define MDSET_T_MDAUTO_MASK GENMASK(7, 4) | |
95 | #define MDSET_T_MDAUTO_AUTO (0xf << 4) | |
96 | #define MDSET_T_MDAUTO_MANUAL (0x0 << 4) | |
97 | #define MDSET_T_FFTS_MASK GENMASK(3, 2) | |
98 | #define MDSET_T_FFTS_MODE1 (0x0 << 2) | |
99 | #define MDSET_T_FFTS_MODE2 (0x1 << 2) | |
100 | #define MDSET_T_FFTS_MODE3 (0x2 << 2) | |
101 | #define MDSET_T_GI_MASK GENMASK(1, 0) | |
102 | #define MDSET_T_GI_1_32 (0x0 << 0) | |
103 | #define MDSET_T_GI_1_16 (0x1 << 0) | |
104 | #define MDSET_T_GI_1_8 (0x2 << 0) | |
105 | #define MDSET_T_GI_1_4 (0x3 << 0) | |
106 | #define MDASET_T 0x14 | |
107 | #define ADCSET1_T 0x20 | |
108 | #define ADCSET1_T_REFSEL_MASK GENMASK(1, 0) | |
109 | #define ADCSET1_T_REFSEL_2V (0x3 << 0) | |
110 | #define ADCSET1_T_REFSEL_1_5V (0x2 << 0) | |
111 | #define ADCSET1_T_REFSEL_1V (0x1 << 0) | |
112 | #define NCOFREQU_T 0x24 | |
113 | #define NCOFREQM_T 0x25 | |
114 | #define NCOFREQL_T 0x26 | |
115 | #define FADU_T 0x27 | |
116 | #define FADM_T 0x28 | |
117 | #define FADL_T 0x29 | |
118 | #define AGCSET2_T 0x2c | |
119 | #define AGCSET2_T_IFPOLINV_INC BIT(0) | |
120 | #define AGCSET2_T_RFPOLINV_INC BIT(1) | |
121 | #define AGCV3_T 0x3e | |
122 | #define MDRD_T 0xa2 | |
123 | #define MDRD_T_SEGID_MASK GENMASK(5, 4) | |
124 | #define MDRD_T_SEGID_13 (0x0 << 4) | |
125 | #define MDRD_T_SEGID_1 (0x1 << 4) | |
126 | #define MDRD_T_SEGID_3 (0x2 << 4) | |
127 | #define MDRD_T_FFTS_MASK GENMASK(3, 2) | |
128 | #define MDRD_T_FFTS_MODE1 (0x0 << 2) | |
129 | #define MDRD_T_FFTS_MODE2 (0x1 << 2) | |
130 | #define MDRD_T_FFTS_MODE3 (0x2 << 2) | |
131 | #define MDRD_T_GI_MASK GENMASK(1, 0) | |
132 | #define MDRD_T_GI_1_32 (0x0 << 0) | |
133 | #define MDRD_T_GI_1_16 (0x1 << 0) | |
134 | #define MDRD_T_GI_1_8 (0x2 << 0) | |
135 | #define MDRD_T_GI_1_4 (0x3 << 0) | |
136 | #define SSEQRD_T 0xa3 | |
137 | #define SSEQRD_T_SSEQSTRD_MASK GENMASK(3, 0) | |
138 | #define SSEQRD_T_SSEQSTRD_RESET (0x0 << 0) | |
139 | #define SSEQRD_T_SSEQSTRD_TUNING (0x1 << 0) | |
140 | #define SSEQRD_T_SSEQSTRD_AGC (0x2 << 0) | |
141 | #define SSEQRD_T_SSEQSTRD_SEARCH (0x3 << 0) | |
142 | #define SSEQRD_T_SSEQSTRD_CLOCK_SYNC (0x4 << 0) | |
143 | #define SSEQRD_T_SSEQSTRD_FREQ_SYNC (0x8 << 0) | |
144 | #define SSEQRD_T_SSEQSTRD_FRAME_SYNC (0x9 << 0) | |
145 | #define SSEQRD_T_SSEQSTRD_SYNC (0xa << 0) | |
146 | #define SSEQRD_T_SSEQSTRD_LOCK (0xb << 0) | |
147 | #define AGCRDU_T 0xa8 | |
148 | #define AGCRDL_T 0xa9 | |
149 | #define CNRDU_T 0xbe | |
150 | #define CNRDL_T 0xbf | |
151 | #define BERFLG_T 0xc0 | |
152 | #define BERFLG_T_BERDRDY BIT(7) | |
153 | #define BERFLG_T_BERDCHK BIT(6) | |
154 | #define BERFLG_T_BERVRDYA BIT(5) | |
155 | #define BERFLG_T_BERVCHKA BIT(4) | |
156 | #define BERFLG_T_BERVRDYB BIT(3) | |
157 | #define BERFLG_T_BERVCHKB BIT(2) | |
158 | #define BERFLG_T_BERVRDYC BIT(1) | |
159 | #define BERFLG_T_BERVCHKC BIT(0) | |
160 | #define BERRDU_T 0xc1 | |
161 | #define BERRDM_T 0xc2 | |
162 | #define BERRDL_T 0xc3 | |
163 | #define BERLENRDU_T 0xc4 | |
164 | #define BERLENRDL_T 0xc5 | |
165 | #define ERRFLG_T 0xc6 | |
166 | #define ERRFLG_T_BERDOVF BIT(7) | |
167 | #define ERRFLG_T_BERVOVFA BIT(6) | |
168 | #define ERRFLG_T_BERVOVFB BIT(5) | |
169 | #define ERRFLG_T_BERVOVFC BIT(4) | |
170 | #define ERRFLG_T_NERRFA BIT(3) | |
171 | #define ERRFLG_T_NERRFB BIT(2) | |
172 | #define ERRFLG_T_NERRFC BIT(1) | |
173 | #define ERRFLG_T_NERRF BIT(0) | |
174 | #define DOSET1_T 0xcf | |
175 | ||
176 | #define CLK_LOW 4000000 | |
177 | #define CLK_DIRECT 20200000 | |
178 | #define CLK_MAX 25410000 | |
179 | ||
180 | #define S_T_FREQ 8126984 /* 512 / 63 MHz */ | |
181 | ||
182 | struct mn88443x_spec { | |
183 | bool primary; | |
184 | }; | |
185 | ||
186 | struct mn88443x_priv { | |
187 | const struct mn88443x_spec *spec; | |
188 | ||
189 | struct dvb_frontend fe; | |
190 | struct clk *mclk; | |
191 | struct gpio_desc *reset_gpio; | |
192 | u32 clk_freq; | |
193 | u32 if_freq; | |
194 | ||
195 | /* Common */ | |
196 | bool use_clkbuf; | |
197 | ||
198 | /* ISDB-S */ | |
199 | struct i2c_client *client_s; | |
200 | struct regmap *regmap_s; | |
201 | ||
202 | /* ISDB-T */ | |
203 | struct i2c_client *client_t; | |
204 | struct regmap *regmap_t; | |
205 | }; | |
206 | ||
207 | static void mn88443x_cmn_power_on(struct mn88443x_priv *chip) | |
208 | { | |
209 | struct regmap *r_t = chip->regmap_t; | |
210 | ||
211 | clk_prepare_enable(chip->mclk); | |
212 | ||
213 | gpiod_set_value_cansleep(chip->reset_gpio, 1); | |
214 | usleep_range(100, 1000); | |
215 | gpiod_set_value_cansleep(chip->reset_gpio, 0); | |
216 | ||
217 | if (chip->spec->primary) { | |
218 | regmap_write(r_t, OUTCSET, OUTCSET_CHDRV_8MA); | |
219 | regmap_write(r_t, PLDWSET, PLDWSET_NORMAL); | |
220 | regmap_write(r_t, HIZSET1, 0x80); | |
221 | regmap_write(r_t, HIZSET2, 0xe0); | |
222 | } else { | |
223 | regmap_write(r_t, HIZSET3, 0x8f); | |
224 | } | |
225 | } | |
226 | ||
227 | static void mn88443x_cmn_power_off(struct mn88443x_priv *chip) | |
228 | { | |
229 | gpiod_set_value_cansleep(chip->reset_gpio, 1); | |
230 | ||
231 | clk_disable_unprepare(chip->mclk); | |
232 | } | |
233 | ||
234 | static void mn88443x_s_sleep(struct mn88443x_priv *chip) | |
235 | { | |
236 | struct regmap *r_t = chip->regmap_t; | |
237 | ||
238 | regmap_update_bits(r_t, PWDSET, PWDSET_PSKPD_MASK, | |
239 | PWDSET_PSKPD_DOWN); | |
240 | } | |
241 | ||
242 | static void mn88443x_s_wake(struct mn88443x_priv *chip) | |
243 | { | |
244 | struct regmap *r_t = chip->regmap_t; | |
245 | ||
246 | regmap_update_bits(r_t, PWDSET, PWDSET_PSKPD_MASK, 0); | |
247 | } | |
248 | ||
249 | static void mn88443x_s_tune(struct mn88443x_priv *chip, | |
250 | struct dtv_frontend_properties *c) | |
251 | { | |
252 | struct regmap *r_s = chip->regmap_s; | |
253 | ||
254 | regmap_write(r_s, ATSIDU_S, c->stream_id >> 8); | |
255 | regmap_write(r_s, ATSIDL_S, c->stream_id); | |
256 | regmap_write(r_s, TSSET_S, 0); | |
257 | } | |
258 | ||
259 | static int mn88443x_s_read_status(struct mn88443x_priv *chip, | |
260 | struct dtv_frontend_properties *c, | |
261 | enum fe_status *status) | |
262 | { | |
263 | struct regmap *r_s = chip->regmap_s; | |
264 | u32 cpmon, tmpu, tmpl, flg; | |
265 | u64 tmp; | |
266 | ||
267 | /* Sync detection */ | |
268 | regmap_read(r_s, CPMON1_S, &cpmon); | |
269 | ||
270 | *status = 0; | |
271 | if (cpmon & CPMON1_S_FSYNC) | |
272 | *status |= FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; | |
273 | if (cpmon & CPMON1_S_W2LOCK) | |
274 | *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER; | |
275 | ||
276 | /* Signal strength */ | |
277 | c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; | |
278 | ||
279 | if (*status & FE_HAS_SIGNAL) { | |
280 | u32 agc; | |
281 | ||
282 | regmap_read(r_s, AGCREAD_S, &tmpu); | |
283 | agc = tmpu << 8; | |
284 | ||
285 | c->strength.len = 1; | |
286 | c->strength.stat[0].scale = FE_SCALE_RELATIVE; | |
287 | c->strength.stat[0].uvalue = agc; | |
288 | } | |
289 | ||
290 | /* C/N rate */ | |
291 | c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; | |
292 | ||
293 | if (*status & FE_HAS_VITERBI) { | |
294 | u32 cnr = 0, x, y, d; | |
295 | u64 d_3 = 0; | |
296 | ||
297 | regmap_read(r_s, CNRDXU_S, &tmpu); | |
298 | regmap_read(r_s, CNRDXL_S, &tmpl); | |
299 | x = (tmpu << 8) | tmpl; | |
300 | regmap_read(r_s, CNRDYU_S, &tmpu); | |
301 | regmap_read(r_s, CNRDYL_S, &tmpl); | |
302 | y = (tmpu << 8) | tmpl; | |
303 | ||
304 | /* CNR[dB]: 10 * log10(D) - 30.74 / D^3 - 3 */ | |
305 | /* D = x^2 / (2^15 * y - x^2) */ | |
306 | d = (y << 15) - x * x; | |
307 | if (d > 0) { | |
308 | /* (2^4 * D)^3 = 2^12 * D^3 */ | |
309 | /* 3.074 * 2^(12 + 24) = 211243671486 */ | |
310 | d_3 = div_u64(16 * x * x, d); | |
311 | d_3 = d_3 * d_3 * d_3; | |
312 | if (d_3) | |
313 | d_3 = div_u64(211243671486ULL, d_3); | |
314 | } | |
315 | ||
316 | if (d_3) { | |
317 | /* 0.3 * 2^24 = 5033164 */ | |
318 | tmp = (s64)2 * intlog10(x) - intlog10(abs(d)) - d_3 | |
319 | - 5033164; | |
320 | cnr = div_u64(tmp * 10000, 1 << 24); | |
321 | } | |
322 | ||
323 | if (cnr) { | |
324 | c->cnr.len = 1; | |
325 | c->cnr.stat[0].scale = FE_SCALE_DECIBEL; | |
326 | c->cnr.stat[0].uvalue = cnr; | |
327 | } | |
328 | } | |
329 | ||
330 | /* BER */ | |
331 | c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; | |
332 | c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; | |
333 | ||
334 | regmap_read(r_s, BERCNFLG_S, &flg); | |
335 | ||
336 | if ((*status & FE_HAS_VITERBI) && (flg & BERCNFLG_S_BERVRDY)) { | |
337 | u32 bit_err, bit_cnt; | |
338 | ||
339 | regmap_read(r_s, BERVRDU_S, &tmpu); | |
340 | regmap_read(r_s, BERVRDL_S, &tmpl); | |
341 | bit_err = (tmpu << 8) | tmpl; | |
342 | bit_cnt = (1 << 13) * 204; | |
343 | ||
344 | if (bit_cnt) { | |
345 | c->post_bit_error.len = 1; | |
346 | c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; | |
347 | c->post_bit_error.stat[0].uvalue = bit_err; | |
348 | c->post_bit_count.len = 1; | |
349 | c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER; | |
350 | c->post_bit_count.stat[0].uvalue = bit_cnt; | |
351 | } | |
352 | } | |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
357 | static void mn88443x_t_sleep(struct mn88443x_priv *chip) | |
358 | { | |
359 | struct regmap *r_t = chip->regmap_t; | |
360 | ||
361 | regmap_update_bits(r_t, PWDSET, PWDSET_OFDMPD_MASK, | |
362 | PWDSET_OFDMPD_DOWN); | |
363 | } | |
364 | ||
365 | static void mn88443x_t_wake(struct mn88443x_priv *chip) | |
366 | { | |
367 | struct regmap *r_t = chip->regmap_t; | |
368 | ||
369 | regmap_update_bits(r_t, PWDSET, PWDSET_OFDMPD_MASK, 0); | |
370 | } | |
371 | ||
372 | static bool mn88443x_t_is_valid_clk(u32 adckt, u32 if_freq) | |
373 | { | |
374 | if (if_freq == DIRECT_IF_57MHZ) { | |
375 | if (adckt >= CLK_DIRECT && adckt <= 21000000) | |
376 | return true; | |
377 | if (adckt >= 25300000 && adckt <= CLK_MAX) | |
378 | return true; | |
379 | } else if (if_freq == DIRECT_IF_44MHZ) { | |
380 | if (adckt >= 25000000 && adckt <= CLK_MAX) | |
381 | return true; | |
382 | } else if (if_freq >= LOW_IF_4MHZ && if_freq < DIRECT_IF_44MHZ) { | |
383 | if (adckt >= CLK_DIRECT && adckt <= CLK_MAX) | |
384 | return true; | |
385 | } | |
386 | ||
387 | return false; | |
388 | } | |
389 | ||
390 | static int mn88443x_t_set_freq(struct mn88443x_priv *chip) | |
391 | { | |
392 | struct device *dev = &chip->client_s->dev; | |
393 | struct regmap *r_t = chip->regmap_t; | |
394 | s64 adckt, nco, ad_t; | |
395 | u32 m, v; | |
396 | ||
397 | /* Clock buffer (but not supported) or XTAL */ | |
398 | if (chip->clk_freq >= CLK_LOW && chip->clk_freq < CLK_DIRECT) { | |
399 | chip->use_clkbuf = true; | |
400 | regmap_write(r_t, CLKSET1_T, 0x07); | |
401 | ||
402 | adckt = 0; | |
403 | } else { | |
404 | chip->use_clkbuf = false; | |
405 | regmap_write(r_t, CLKSET1_T, 0x00); | |
406 | ||
407 | adckt = chip->clk_freq; | |
408 | } | |
409 | if (!mn88443x_t_is_valid_clk(adckt, chip->if_freq)) { | |
410 | dev_err(dev, "Invalid clock, CLK:%d, ADCKT:%lld, IF:%d\n", | |
411 | chip->clk_freq, adckt, chip->if_freq); | |
412 | return -EINVAL; | |
413 | } | |
414 | ||
415 | /* Direct IF or Low IF */ | |
416 | if (chip->if_freq == DIRECT_IF_57MHZ || | |
417 | chip->if_freq == DIRECT_IF_44MHZ) | |
418 | nco = adckt * 2 - chip->if_freq; | |
419 | else | |
420 | nco = -((s64)chip->if_freq); | |
421 | nco = div_s64(nco << 24, adckt); | |
422 | ad_t = div_s64(adckt << 22, S_T_FREQ); | |
423 | ||
424 | regmap_write(r_t, NCOFREQU_T, nco >> 16); | |
425 | regmap_write(r_t, NCOFREQM_T, nco >> 8); | |
426 | regmap_write(r_t, NCOFREQL_T, nco); | |
427 | regmap_write(r_t, FADU_T, ad_t >> 16); | |
428 | regmap_write(r_t, FADM_T, ad_t >> 8); | |
429 | regmap_write(r_t, FADL_T, ad_t); | |
430 | ||
431 | /* Level of IF */ | |
432 | m = ADCSET1_T_REFSEL_MASK; | |
433 | v = ADCSET1_T_REFSEL_1_5V; | |
434 | regmap_update_bits(r_t, ADCSET1_T, m, v); | |
435 | ||
436 | /* Polarity of AGC */ | |
437 | v = AGCSET2_T_IFPOLINV_INC | AGCSET2_T_RFPOLINV_INC; | |
438 | regmap_update_bits(r_t, AGCSET2_T, v, v); | |
439 | ||
440 | /* Lower output level of AGC */ | |
441 | regmap_write(r_t, AGCV3_T, 0x00); | |
442 | ||
443 | regmap_write(r_t, MDSET_T, 0xfa); | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
448 | static void mn88443x_t_tune(struct mn88443x_priv *chip, | |
449 | struct dtv_frontend_properties *c) | |
450 | { | |
451 | struct regmap *r_t = chip->regmap_t; | |
452 | u32 m, v; | |
453 | ||
454 | m = MDSET_T_MDAUTO_MASK | MDSET_T_FFTS_MASK | MDSET_T_GI_MASK; | |
455 | v = MDSET_T_MDAUTO_AUTO | MDSET_T_FFTS_MODE3 | MDSET_T_GI_1_8; | |
456 | regmap_update_bits(r_t, MDSET_T, m, v); | |
457 | ||
458 | regmap_write(r_t, MDASET_T, 0); | |
459 | } | |
460 | ||
461 | static int mn88443x_t_read_status(struct mn88443x_priv *chip, | |
462 | struct dtv_frontend_properties *c, | |
463 | enum fe_status *status) | |
464 | { | |
465 | struct regmap *r_t = chip->regmap_t; | |
466 | u32 seqrd, st, flg, tmpu, tmpm, tmpl; | |
467 | u64 tmp; | |
468 | ||
469 | /* Sync detection */ | |
470 | regmap_read(r_t, SSEQRD_T, &seqrd); | |
471 | st = seqrd & SSEQRD_T_SSEQSTRD_MASK; | |
472 | ||
473 | *status = 0; | |
474 | if (st >= SSEQRD_T_SSEQSTRD_SYNC) | |
475 | *status |= FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; | |
476 | if (st >= SSEQRD_T_SSEQSTRD_FRAME_SYNC) | |
477 | *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER; | |
478 | ||
479 | /* Signal strength */ | |
480 | c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; | |
481 | ||
482 | if (*status & FE_HAS_SIGNAL) { | |
483 | u32 agc; | |
484 | ||
485 | regmap_read(r_t, AGCRDU_T, &tmpu); | |
486 | regmap_read(r_t, AGCRDL_T, &tmpl); | |
487 | agc = (tmpu << 8) | tmpl; | |
488 | ||
489 | c->strength.len = 1; | |
490 | c->strength.stat[0].scale = FE_SCALE_RELATIVE; | |
491 | c->strength.stat[0].uvalue = agc; | |
492 | } | |
493 | ||
494 | /* C/N rate */ | |
495 | c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; | |
496 | ||
497 | if (*status & FE_HAS_VITERBI) { | |
498 | u32 cnr; | |
499 | ||
500 | regmap_read(r_t, CNRDU_T, &tmpu); | |
501 | regmap_read(r_t, CNRDL_T, &tmpl); | |
502 | ||
503 | if (tmpu || tmpl) { | |
504 | /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */ | |
505 | /* intlog10(65536) = 80807124, 0.2 * 2^24 = 3355443 */ | |
506 | tmp = (u64)80807124 - intlog10((tmpu << 8) | tmpl) | |
507 | + 3355443; | |
508 | cnr = div_u64(tmp * 10000, 1 << 24); | |
509 | } else { | |
510 | cnr = 0; | |
511 | } | |
512 | ||
513 | c->cnr.len = 1; | |
514 | c->cnr.stat[0].scale = FE_SCALE_DECIBEL; | |
515 | c->cnr.stat[0].uvalue = cnr; | |
516 | } | |
517 | ||
518 | /* BER */ | |
519 | c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; | |
520 | c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; | |
521 | ||
522 | regmap_read(r_t, BERFLG_T, &flg); | |
523 | ||
524 | if ((*status & FE_HAS_VITERBI) && (flg & BERFLG_T_BERVRDYA)) { | |
525 | u32 bit_err, bit_cnt; | |
526 | ||
527 | regmap_read(r_t, BERRDU_T, &tmpu); | |
528 | regmap_read(r_t, BERRDM_T, &tmpm); | |
529 | regmap_read(r_t, BERRDL_T, &tmpl); | |
530 | bit_err = (tmpu << 16) | (tmpm << 8) | tmpl; | |
531 | ||
532 | regmap_read(r_t, BERLENRDU_T, &tmpu); | |
533 | regmap_read(r_t, BERLENRDL_T, &tmpl); | |
534 | bit_cnt = ((tmpu << 8) | tmpl) * 203 * 8; | |
535 | ||
536 | if (bit_cnt) { | |
537 | c->post_bit_error.len = 1; | |
538 | c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; | |
539 | c->post_bit_error.stat[0].uvalue = bit_err; | |
540 | c->post_bit_count.len = 1; | |
541 | c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER; | |
542 | c->post_bit_count.stat[0].uvalue = bit_cnt; | |
543 | } | |
544 | } | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | static int mn88443x_sleep(struct dvb_frontend *fe) | |
550 | { | |
551 | struct mn88443x_priv *chip = fe->demodulator_priv; | |
552 | ||
553 | mn88443x_s_sleep(chip); | |
554 | mn88443x_t_sleep(chip); | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
559 | static int mn88443x_set_frontend(struct dvb_frontend *fe) | |
560 | { | |
561 | struct mn88443x_priv *chip = fe->demodulator_priv; | |
562 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; | |
563 | struct regmap *r_s = chip->regmap_s; | |
564 | struct regmap *r_t = chip->regmap_t; | |
565 | u8 tssel = 0, intsel = 0; | |
566 | ||
567 | if (c->delivery_system == SYS_ISDBS) { | |
568 | mn88443x_s_wake(chip); | |
569 | mn88443x_t_sleep(chip); | |
570 | ||
571 | tssel = TSSET1_TSASEL_ISDBS; | |
572 | intsel = TSSET3_INTASEL_S; | |
573 | } else if (c->delivery_system == SYS_ISDBT) { | |
574 | mn88443x_s_sleep(chip); | |
575 | mn88443x_t_wake(chip); | |
576 | ||
577 | mn88443x_t_set_freq(chip); | |
578 | ||
579 | tssel = TSSET1_TSASEL_ISDBT; | |
580 | intsel = TSSET3_INTASEL_T; | |
581 | } | |
582 | ||
583 | regmap_update_bits(r_t, TSSET1, | |
584 | TSSET1_TSASEL_MASK | TSSET1_TSBSEL_MASK, | |
585 | tssel | TSSET1_TSBSEL_NONE); | |
586 | regmap_write(r_t, TSSET2, 0); | |
587 | regmap_update_bits(r_t, TSSET3, | |
588 | TSSET3_INTASEL_MASK | TSSET3_INTBSEL_MASK, | |
589 | intsel | TSSET3_INTBSEL_NONE); | |
590 | ||
591 | regmap_write(r_t, DOSET1_T, 0x95); | |
592 | regmap_write(r_s, DOSET1_S, 0x80); | |
593 | ||
594 | if (c->delivery_system == SYS_ISDBS) | |
595 | mn88443x_s_tune(chip, c); | |
596 | else if (c->delivery_system == SYS_ISDBT) | |
597 | mn88443x_t_tune(chip, c); | |
598 | ||
599 | if (fe->ops.tuner_ops.set_params) { | |
600 | if (fe->ops.i2c_gate_ctrl) | |
601 | fe->ops.i2c_gate_ctrl(fe, 1); | |
602 | fe->ops.tuner_ops.set_params(fe); | |
603 | if (fe->ops.i2c_gate_ctrl) | |
604 | fe->ops.i2c_gate_ctrl(fe, 0); | |
605 | } | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
610 | static int mn88443x_get_tune_settings(struct dvb_frontend *fe, | |
611 | struct dvb_frontend_tune_settings *s) | |
612 | { | |
613 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; | |
614 | ||
615 | s->min_delay_ms = 850; | |
616 | ||
617 | if (c->delivery_system == SYS_ISDBS) { | |
618 | s->max_drift = 30000 * 2 + 1; | |
619 | s->step_size = 30000; | |
620 | } else if (c->delivery_system == SYS_ISDBT) { | |
621 | s->max_drift = 142857 * 2 + 1; | |
622 | s->step_size = 142857 * 2; | |
623 | } | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | static int mn88443x_read_status(struct dvb_frontend *fe, enum fe_status *status) | |
629 | { | |
630 | struct mn88443x_priv *chip = fe->demodulator_priv; | |
631 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; | |
632 | ||
633 | if (c->delivery_system == SYS_ISDBS) | |
634 | return mn88443x_s_read_status(chip, c, status); | |
635 | ||
636 | if (c->delivery_system == SYS_ISDBT) | |
637 | return mn88443x_t_read_status(chip, c, status); | |
638 | ||
639 | return -EINVAL; | |
640 | } | |
641 | ||
642 | static const struct dvb_frontend_ops mn88443x_ops = { | |
643 | .delsys = { SYS_ISDBS, SYS_ISDBT }, | |
644 | .info = { | |
645 | .name = "Socionext MN88443x", | |
646 | .frequency_min_hz = 470 * MHz, | |
647 | .frequency_max_hz = 2071 * MHz, | |
648 | .symbol_rate_min = 28860000, | |
649 | .symbol_rate_max = 28860000, | |
650 | .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_AUTO | | |
651 | FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO | | |
652 | FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO, | |
653 | }, | |
654 | ||
655 | .sleep = mn88443x_sleep, | |
656 | .set_frontend = mn88443x_set_frontend, | |
657 | .get_tune_settings = mn88443x_get_tune_settings, | |
658 | .read_status = mn88443x_read_status, | |
659 | }; | |
660 | ||
661 | static const struct regmap_config regmap_config = { | |
662 | .reg_bits = 8, | |
663 | .val_bits = 8, | |
664 | .cache_type = REGCACHE_NONE, | |
665 | }; | |
666 | ||
667 | static int mn88443x_probe(struct i2c_client *client, | |
668 | const struct i2c_device_id *id) | |
669 | { | |
670 | struct mn88443x_config *conf = client->dev.platform_data; | |
671 | struct mn88443x_priv *chip; | |
672 | struct device *dev = &client->dev; | |
673 | int ret; | |
674 | ||
675 | chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL); | |
676 | if (!chip) | |
677 | return -ENOMEM; | |
678 | ||
679 | if (dev->of_node) | |
680 | chip->spec = of_device_get_match_data(dev); | |
681 | else | |
682 | chip->spec = (struct mn88443x_spec *)id->driver_data; | |
683 | if (!chip->spec) | |
684 | return -EINVAL; | |
685 | ||
686 | chip->mclk = devm_clk_get(dev, "mclk"); | |
687 | if (IS_ERR(chip->mclk) && !conf) { | |
688 | dev_err(dev, "Failed to request mclk: %ld\n", | |
689 | PTR_ERR(chip->mclk)); | |
690 | return PTR_ERR(chip->mclk); | |
691 | } | |
692 | ||
693 | ret = of_property_read_u32(dev->of_node, "if-frequency", | |
694 | &chip->if_freq); | |
695 | if (ret && !conf) { | |
696 | dev_err(dev, "Failed to load IF frequency: %d.\n", ret); | |
697 | return ret; | |
698 | } | |
699 | ||
700 | chip->reset_gpio = devm_gpiod_get_optional(dev, "reset", | |
701 | GPIOD_OUT_HIGH); | |
702 | if (IS_ERR(chip->reset_gpio)) { | |
703 | dev_err(dev, "Failed to request reset_gpio: %ld\n", | |
704 | PTR_ERR(chip->reset_gpio)); | |
705 | return PTR_ERR(chip->reset_gpio); | |
706 | } | |
707 | ||
708 | if (conf) { | |
709 | chip->mclk = conf->mclk; | |
710 | chip->if_freq = conf->if_freq; | |
711 | chip->reset_gpio = conf->reset_gpio; | |
712 | ||
713 | *conf->fe = &chip->fe; | |
714 | } | |
715 | ||
716 | chip->client_s = client; | |
717 | chip->regmap_s = devm_regmap_init_i2c(chip->client_s, ®map_config); | |
718 | if (IS_ERR(chip->regmap_s)) | |
719 | return PTR_ERR(chip->regmap_s); | |
720 | ||
721 | /* | |
722 | * Chip has two I2C addresses for each satellite/terrestrial system. | |
723 | * ISDB-T uses address ISDB-S + 4, so we register a dummy client. | |
724 | */ | |
725 | chip->client_t = i2c_new_dummy(client->adapter, client->addr + 4); | |
726 | if (!chip->client_t) | |
727 | return -ENODEV; | |
728 | ||
729 | chip->regmap_t = devm_regmap_init_i2c(chip->client_t, ®map_config); | |
730 | if (IS_ERR(chip->regmap_t)) { | |
731 | ret = PTR_ERR(chip->regmap_t); | |
732 | goto err_i2c_t; | |
733 | } | |
734 | ||
735 | chip->clk_freq = clk_get_rate(chip->mclk); | |
736 | ||
737 | memcpy(&chip->fe.ops, &mn88443x_ops, sizeof(mn88443x_ops)); | |
738 | chip->fe.demodulator_priv = chip; | |
739 | i2c_set_clientdata(client, chip); | |
740 | ||
741 | mn88443x_cmn_power_on(chip); | |
742 | mn88443x_s_sleep(chip); | |
743 | mn88443x_t_sleep(chip); | |
744 | ||
745 | return 0; | |
746 | ||
747 | err_i2c_t: | |
748 | i2c_unregister_device(chip->client_t); | |
749 | ||
750 | return ret; | |
751 | } | |
752 | ||
753 | static int mn88443x_remove(struct i2c_client *client) | |
754 | { | |
755 | struct mn88443x_priv *chip = i2c_get_clientdata(client); | |
756 | ||
757 | mn88443x_cmn_power_off(chip); | |
758 | ||
759 | i2c_unregister_device(chip->client_t); | |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
764 | static const struct mn88443x_spec mn88443x_spec_pri = { | |
765 | .primary = true, | |
766 | }; | |
767 | ||
768 | static const struct mn88443x_spec mn88443x_spec_sec = { | |
769 | .primary = false, | |
770 | }; | |
771 | ||
772 | static const struct of_device_id mn88443x_of_match[] = { | |
773 | { .compatible = "socionext,mn884433", .data = &mn88443x_spec_pri, }, | |
774 | { .compatible = "socionext,mn884434-0", .data = &mn88443x_spec_pri, }, | |
775 | { .compatible = "socionext,mn884434-1", .data = &mn88443x_spec_sec, }, | |
776 | {} | |
777 | }; | |
778 | MODULE_DEVICE_TABLE(of, mn88443x_of_match); | |
779 | ||
780 | static const struct i2c_device_id mn88443x_i2c_id[] = { | |
781 | { "mn884433", (kernel_ulong_t)&mn88443x_spec_pri }, | |
782 | { "mn884434-0", (kernel_ulong_t)&mn88443x_spec_pri }, | |
783 | { "mn884434-1", (kernel_ulong_t)&mn88443x_spec_sec }, | |
784 | {} | |
785 | }; | |
786 | MODULE_DEVICE_TABLE(i2c, mn88443x_i2c_id); | |
787 | ||
788 | static struct i2c_driver mn88443x_driver = { | |
789 | .driver = { | |
790 | .name = "mn88443x", | |
791 | .of_match_table = of_match_ptr(mn88443x_of_match), | |
792 | }, | |
793 | .probe = mn88443x_probe, | |
794 | .remove = mn88443x_remove, | |
795 | .id_table = mn88443x_i2c_id, | |
796 | }; | |
797 | ||
798 | module_i2c_driver(mn88443x_driver); | |
799 | ||
800 | MODULE_AUTHOR("Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>"); | |
801 | MODULE_DESCRIPTION("Socionext MN88443x series demodulator driver."); | |
802 | MODULE_LICENSE("GPL v2"); |