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3a509bb1 MCC |
1 | /* |
2 | * Sharp VA3A5JZ921 One Seg Broadcast Module driver | |
3 | * This device is labeled as just S. 921 at the top of the frontend can | |
4 | * | |
5 | * Copyright (C) 2009-2010 Mauro Carvalho Chehab <mchehab@redhat.com> | |
6 | * Copyright (C) 2009-2010 Douglas Landgraf <dougsland@redhat.com> | |
7 | * | |
8 | * Developed for Leadership SBTVD 1seg device sold in Brazil | |
9 | * | |
10 | * Frontend module based on cx24123 driver, getting some info from | |
11 | * the old s921 driver. | |
12 | * | |
13 | * FIXME: Need to port to DVB v5.2 API | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or | |
16 | * modify it under the terms of the GNU General Public License as | |
17 | * published by the Free Software Foundation version 2. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
22 | * General Public License for more details. | |
23 | */ | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <asm/div64.h> | |
27 | ||
28 | #include "dvb_frontend.h" | |
29 | #include "s921.h" | |
30 | ||
31 | static int debug = 1; | |
32 | module_param(debug, int, 0644); | |
33 | MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)"); | |
34 | ||
35 | #define rc(args...) do { \ | |
36 | printk(KERN_ERR "s921: " args); \ | |
37 | } while (0) | |
38 | ||
39 | #define dprintk(args...) \ | |
40 | do { \ | |
41 | if (debug) { \ | |
42 | printk(KERN_DEBUG "s921: %s: ", __func__); \ | |
43 | printk(args); \ | |
44 | } \ | |
45 | } while (0) | |
46 | ||
47 | struct s921_state { | |
48 | struct i2c_adapter *i2c; | |
49 | const struct s921_config *config; | |
50 | ||
51 | struct dvb_frontend frontend; | |
52 | ||
53 | /* The Demod can't easily provide these, we cache them */ | |
54 | u32 currentfreq; | |
55 | }; | |
56 | ||
57 | /* | |
58 | * Various tuner defaults need to be established for a given frequency kHz. | |
59 | * fixme: The bounds on the bands do not match the doc in real life. | |
60 | * fixme: Some of them have been moved, other might need adjustment. | |
61 | */ | |
62 | static struct s921_bandselect_val { | |
63 | u32 freq_low; | |
64 | u8 band_reg; | |
65 | } s921_bandselect[] = { | |
66 | { 0, 0x7b }, | |
67 | { 485140000, 0x5b }, | |
68 | { 515140000, 0x3b }, | |
69 | { 545140000, 0x1b }, | |
70 | { 599140000, 0xfb }, | |
71 | { 623140000, 0xdb }, | |
72 | { 659140000, 0xbb }, | |
73 | { 713140000, 0x9b }, | |
74 | }; | |
75 | ||
76 | struct regdata { | |
77 | u8 reg; | |
78 | u8 data; | |
79 | }; | |
80 | ||
81 | static struct regdata s921_init[] = { | |
82 | { 0x01, 0x80 }, /* Probably, a reset sequence */ | |
83 | { 0x01, 0x40 }, | |
84 | { 0x01, 0x80 }, | |
85 | { 0x01, 0x40 }, | |
86 | ||
87 | { 0x02, 0x00 }, | |
88 | { 0x03, 0x40 }, | |
89 | { 0x04, 0x01 }, | |
90 | { 0x05, 0x00 }, | |
91 | { 0x06, 0x00 }, | |
92 | { 0x07, 0x00 }, | |
93 | { 0x08, 0x00 }, | |
94 | { 0x09, 0x00 }, | |
95 | { 0x0a, 0x00 }, | |
96 | { 0x0b, 0x5a }, | |
97 | { 0x0c, 0x00 }, | |
98 | { 0x0d, 0x00 }, | |
99 | { 0x0f, 0x00 }, | |
100 | { 0x13, 0x1b }, | |
101 | { 0x14, 0x80 }, | |
102 | { 0x15, 0x40 }, | |
103 | { 0x17, 0x70 }, | |
104 | { 0x18, 0x01 }, | |
105 | { 0x19, 0x12 }, | |
106 | { 0x1a, 0x01 }, | |
107 | { 0x1b, 0x12 }, | |
108 | { 0x1c, 0xa0 }, | |
109 | { 0x1d, 0x00 }, | |
110 | { 0x1e, 0x0a }, | |
111 | { 0x1f, 0x08 }, | |
112 | { 0x20, 0x40 }, | |
113 | { 0x21, 0xff }, | |
114 | { 0x22, 0x4c }, | |
115 | { 0x23, 0x4e }, | |
116 | { 0x24, 0x4c }, | |
117 | { 0x25, 0x00 }, | |
118 | { 0x26, 0x00 }, | |
119 | { 0x27, 0xf4 }, | |
120 | { 0x28, 0x60 }, | |
121 | { 0x29, 0x88 }, | |
122 | { 0x2a, 0x40 }, | |
123 | { 0x2b, 0x40 }, | |
124 | { 0x2c, 0xff }, | |
125 | { 0x2d, 0x00 }, | |
126 | { 0x2e, 0xff }, | |
127 | { 0x2f, 0x00 }, | |
128 | { 0x30, 0x20 }, | |
129 | { 0x31, 0x06 }, | |
130 | { 0x32, 0x0c }, | |
131 | { 0x34, 0x0f }, | |
132 | { 0x37, 0xfe }, | |
133 | { 0x38, 0x00 }, | |
134 | { 0x39, 0x63 }, | |
135 | { 0x3a, 0x10 }, | |
136 | { 0x3b, 0x10 }, | |
137 | { 0x47, 0x00 }, | |
138 | { 0x49, 0xe5 }, | |
139 | { 0x4b, 0x00 }, | |
140 | { 0x50, 0xc0 }, | |
141 | { 0x52, 0x20 }, | |
142 | { 0x54, 0x5a }, | |
143 | { 0x55, 0x5b }, | |
144 | { 0x56, 0x40 }, | |
145 | { 0x57, 0x70 }, | |
146 | { 0x5c, 0x50 }, | |
147 | { 0x5d, 0x00 }, | |
148 | { 0x62, 0x17 }, | |
149 | { 0x63, 0x2f }, | |
150 | { 0x64, 0x6f }, | |
151 | { 0x68, 0x00 }, | |
152 | { 0x69, 0x89 }, | |
153 | { 0x6a, 0x00 }, | |
154 | { 0x6b, 0x00 }, | |
155 | { 0x6c, 0x00 }, | |
156 | { 0x6d, 0x00 }, | |
157 | { 0x6e, 0x00 }, | |
158 | { 0x70, 0x10 }, | |
159 | { 0x71, 0x00 }, | |
160 | { 0x75, 0x00 }, | |
161 | { 0x76, 0x30 }, | |
162 | { 0x77, 0x01 }, | |
163 | { 0xaf, 0x00 }, | |
164 | { 0xb0, 0xa0 }, | |
165 | { 0xb2, 0x3d }, | |
166 | { 0xb3, 0x25 }, | |
167 | { 0xb4, 0x8b }, | |
168 | { 0xb5, 0x4b }, | |
169 | { 0xb6, 0x3f }, | |
170 | { 0xb7, 0xff }, | |
171 | { 0xb8, 0xff }, | |
172 | { 0xb9, 0xfc }, | |
173 | { 0xba, 0x00 }, | |
174 | { 0xbb, 0x00 }, | |
175 | { 0xbc, 0x00 }, | |
176 | { 0xd0, 0x30 }, | |
177 | { 0xe4, 0x84 }, | |
178 | { 0xf0, 0x48 }, | |
179 | { 0xf1, 0x19 }, | |
180 | { 0xf2, 0x5a }, | |
181 | { 0xf3, 0x8e }, | |
182 | { 0xf4, 0x2d }, | |
183 | { 0xf5, 0x07 }, | |
184 | { 0xf6, 0x5a }, | |
185 | { 0xf7, 0xba }, | |
186 | { 0xf8, 0xd7 }, | |
187 | }; | |
188 | ||
189 | static struct regdata s921_prefreq[] = { | |
190 | { 0x47, 0x60 }, | |
191 | { 0x68, 0x00 }, | |
192 | { 0x69, 0x89 }, | |
193 | { 0xf0, 0x48 }, | |
194 | { 0xf1, 0x19 }, | |
195 | }; | |
196 | ||
197 | static struct regdata s921_postfreq[] = { | |
198 | { 0xf5, 0xae }, | |
199 | { 0xf6, 0xb7 }, | |
200 | { 0xf7, 0xba }, | |
201 | { 0xf8, 0xd7 }, | |
202 | { 0x68, 0x0a }, | |
203 | { 0x69, 0x09 }, | |
204 | }; | |
205 | ||
206 | static int s921_i2c_writereg(struct s921_state *state, | |
207 | u8 i2c_addr, int reg, int data) | |
208 | { | |
209 | u8 buf[] = { reg, data }; | |
210 | struct i2c_msg msg = { | |
211 | .addr = i2c_addr, .flags = 0, .buf = buf, .len = 2 | |
212 | }; | |
213 | int rc; | |
214 | ||
215 | rc = i2c_transfer(state->i2c, &msg, 1); | |
216 | if (rc != 1) { | |
217 | printk("%s: writereg rcor(rc == %i, reg == 0x%02x," | |
218 | " data == 0x%02x)\n", __func__, rc, reg, data); | |
219 | return rc; | |
220 | } | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | static int s921_i2c_writeregdata(struct s921_state *state, u8 i2c_addr, | |
226 | struct regdata *rd, int size) | |
227 | { | |
228 | int i, rc; | |
229 | ||
230 | for (i = 0; i < size; i++) { | |
231 | rc = s921_i2c_writereg(state, i2c_addr, rd[i].reg, rd[i].data); | |
232 | if (rc < 0) | |
233 | return rc; | |
234 | } | |
235 | return 0; | |
236 | } | |
237 | ||
238 | static int s921_i2c_readreg(struct s921_state *state, u8 i2c_addr, u8 reg) | |
239 | { | |
240 | u8 val; | |
241 | int rc; | |
242 | struct i2c_msg msg[] = { | |
243 | { .addr = i2c_addr, .flags = 0, .buf = ®, .len = 1 }, | |
244 | { .addr = i2c_addr, .flags = I2C_M_RD, .buf = &val, .len = 1 } | |
245 | }; | |
246 | ||
247 | rc = i2c_transfer(state->i2c, msg, 2); | |
248 | ||
249 | if (rc != 2) { | |
250 | rc("%s: reg=0x%x (rcor=%d)\n", __func__, reg, rc); | |
251 | return rc; | |
252 | } | |
253 | ||
254 | return val; | |
255 | } | |
256 | ||
257 | #define s921_readreg(state, reg) \ | |
258 | s921_i2c_readreg(state, state->config->demod_address, reg) | |
259 | #define s921_writereg(state, reg, val) \ | |
260 | s921_i2c_writereg(state, state->config->demod_address, reg, val) | |
261 | #define s921_writeregdata(state, regdata) \ | |
262 | s921_i2c_writeregdata(state, state->config->demod_address, \ | |
263 | regdata, ARRAY_SIZE(regdata)) | |
264 | ||
16e3d131 | 265 | static int s921_pll_tune(struct dvb_frontend *fe) |
3a509bb1 | 266 | { |
16e3d131 | 267 | struct dtv_frontend_properties *p = &fe->dtv_property_cache; |
3a509bb1 MCC |
268 | struct s921_state *state = fe->demodulator_priv; |
269 | int band, rc, i; | |
270 | unsigned long f_offset; | |
271 | u8 f_switch; | |
272 | u64 offset; | |
273 | ||
274 | dprintk("frequency=%i\n", p->frequency); | |
275 | ||
276 | for (band = 0; band < ARRAY_SIZE(s921_bandselect); band++) | |
277 | if (p->frequency < s921_bandselect[band].freq_low) | |
278 | break; | |
279 | band--; | |
280 | ||
281 | if (band < 0) { | |
282 | rc("%s: frequency out of range\n", __func__); | |
283 | return -EINVAL; | |
284 | } | |
285 | ||
286 | f_switch = s921_bandselect[band].band_reg; | |
287 | ||
288 | offset = ((u64)p->frequency) * 258; | |
289 | do_div(offset, 6000000); | |
290 | f_offset = ((unsigned long)offset) + 2321; | |
291 | ||
292 | rc = s921_writeregdata(state, s921_prefreq); | |
293 | if (rc < 0) | |
294 | return rc; | |
295 | ||
296 | rc = s921_writereg(state, 0xf2, (f_offset >> 8) & 0xff); | |
297 | if (rc < 0) | |
298 | return rc; | |
299 | ||
300 | rc = s921_writereg(state, 0xf3, f_offset & 0xff); | |
301 | if (rc < 0) | |
302 | return rc; | |
303 | ||
304 | rc = s921_writereg(state, 0xf4, f_switch); | |
305 | if (rc < 0) | |
306 | return rc; | |
307 | ||
308 | rc = s921_writeregdata(state, s921_postfreq); | |
309 | if (rc < 0) | |
310 | return rc; | |
311 | ||
312 | for (i = 0 ; i < 6; i++) { | |
313 | rc = s921_readreg(state, 0x80); | |
314 | dprintk("status 0x80: %02x\n", rc); | |
315 | } | |
316 | rc = s921_writereg(state, 0x01, 0x40); | |
317 | if (rc < 0) | |
318 | return rc; | |
319 | ||
320 | rc = s921_readreg(state, 0x01); | |
321 | dprintk("status 0x01: %02x\n", rc); | |
322 | ||
323 | rc = s921_readreg(state, 0x80); | |
324 | dprintk("status 0x80: %02x\n", rc); | |
325 | ||
326 | rc = s921_readreg(state, 0x80); | |
327 | dprintk("status 0x80: %02x\n", rc); | |
328 | ||
329 | rc = s921_readreg(state, 0x32); | |
330 | dprintk("status 0x32: %02x\n", rc); | |
331 | ||
332 | dprintk("pll tune band=%d, pll=%d\n", f_switch, (int)f_offset); | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
337 | static int s921_initfe(struct dvb_frontend *fe) | |
338 | { | |
339 | struct s921_state *state = fe->demodulator_priv; | |
340 | int rc; | |
341 | ||
342 | dprintk("\n"); | |
343 | ||
344 | rc = s921_writeregdata(state, s921_init); | |
345 | if (rc < 0) | |
346 | return rc; | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
351 | static int s921_read_status(struct dvb_frontend *fe, fe_status_t *status) | |
352 | { | |
353 | struct s921_state *state = fe->demodulator_priv; | |
354 | int regstatus, rc; | |
355 | ||
356 | *status = 0; | |
357 | ||
358 | rc = s921_readreg(state, 0x81); | |
359 | if (rc < 0) | |
360 | return rc; | |
361 | ||
362 | regstatus = rc << 8; | |
363 | ||
364 | rc = s921_readreg(state, 0x82); | |
365 | if (rc < 0) | |
366 | return rc; | |
367 | ||
368 | regstatus |= rc; | |
369 | ||
370 | dprintk("status = %04x\n", regstatus); | |
371 | ||
372 | /* Full Sync - We don't know what each bit means on regs 0x81/0x82 */ | |
373 | if ((regstatus & 0xff) == 0x40) { | |
374 | *status = FE_HAS_SIGNAL | | |
375 | FE_HAS_CARRIER | | |
376 | FE_HAS_VITERBI | | |
377 | FE_HAS_SYNC | | |
378 | FE_HAS_LOCK; | |
379 | } else if (regstatus & 0x40) { | |
380 | /* This is close to Full Sync, but not enough to get useful info */ | |
381 | *status = FE_HAS_SIGNAL | | |
382 | FE_HAS_CARRIER | | |
383 | FE_HAS_VITERBI | | |
384 | FE_HAS_SYNC; | |
385 | } | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
390 | static int s921_read_signal_strength(struct dvb_frontend *fe, u16 *strength) | |
391 | { | |
392 | fe_status_t status; | |
393 | struct s921_state *state = fe->demodulator_priv; | |
394 | int rc; | |
395 | ||
396 | /* FIXME: Use the proper register for it... 0x80? */ | |
397 | rc = s921_read_status(fe, &status); | |
398 | if (rc < 0) | |
399 | return rc; | |
400 | ||
401 | *strength = (status & FE_HAS_LOCK) ? 0xffff : 0; | |
402 | ||
403 | dprintk("strength = 0x%04x\n", *strength); | |
404 | ||
405 | rc = s921_readreg(state, 0x01); | |
406 | dprintk("status 0x01: %02x\n", rc); | |
407 | ||
408 | rc = s921_readreg(state, 0x80); | |
409 | dprintk("status 0x80: %02x\n", rc); | |
410 | ||
411 | rc = s921_readreg(state, 0x32); | |
412 | dprintk("status 0x32: %02x\n", rc); | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
16e3d131 | 417 | static int s921_set_frontend(struct dvb_frontend *fe) |
3a509bb1 | 418 | { |
16e3d131 | 419 | struct dtv_frontend_properties *p = &fe->dtv_property_cache; |
3a509bb1 MCC |
420 | struct s921_state *state = fe->demodulator_priv; |
421 | int rc; | |
422 | ||
423 | dprintk("\n"); | |
424 | ||
425 | /* FIXME: We don't know how to use non-auto mode */ | |
426 | ||
16e3d131 | 427 | rc = s921_pll_tune(fe); |
3a509bb1 MCC |
428 | if (rc < 0) |
429 | return rc; | |
430 | ||
431 | state->currentfreq = p->frequency; | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
436 | static int s921_get_frontend(struct dvb_frontend *fe, | |
16e3d131 | 437 | struct dtv_frontend_properties *p) |
3a509bb1 MCC |
438 | { |
439 | struct s921_state *state = fe->demodulator_priv; | |
440 | ||
441 | /* FIXME: Probably it is possible to get it from regs f1 and f2 */ | |
442 | p->frequency = state->currentfreq; | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
447 | static int s921_tune(struct dvb_frontend *fe, | |
448 | struct dvb_frontend_parameters *params, | |
449 | unsigned int mode_flags, | |
450 | unsigned int *delay, | |
451 | fe_status_t *status) | |
452 | { | |
453 | int rc = 0; | |
454 | ||
455 | dprintk("\n"); | |
456 | ||
457 | if (params != NULL) | |
16e3d131 | 458 | rc = s921_set_frontend(fe); |
3a509bb1 MCC |
459 | |
460 | if (!(mode_flags & FE_TUNE_MODE_ONESHOT)) | |
461 | s921_read_status(fe, status); | |
462 | ||
463 | return rc; | |
464 | } | |
465 | ||
466 | static int s921_get_algo(struct dvb_frontend *fe) | |
467 | { | |
468 | return 1; /* FE_ALGO_HW */ | |
469 | } | |
470 | ||
471 | static void s921_release(struct dvb_frontend *fe) | |
472 | { | |
473 | struct s921_state *state = fe->demodulator_priv; | |
474 | ||
475 | dprintk("\n"); | |
476 | kfree(state); | |
477 | } | |
478 | ||
479 | static struct dvb_frontend_ops s921_ops; | |
480 | ||
481 | struct dvb_frontend *s921_attach(const struct s921_config *config, | |
482 | struct i2c_adapter *i2c) | |
483 | { | |
484 | /* allocate memory for the internal state */ | |
485 | struct s921_state *state = | |
486 | kzalloc(sizeof(struct s921_state), GFP_KERNEL); | |
487 | ||
488 | dprintk("\n"); | |
489 | if (state == NULL) { | |
490 | rc("Unable to kzalloc\n"); | |
491 | goto rcor; | |
492 | } | |
493 | ||
494 | /* setup the state */ | |
495 | state->config = config; | |
496 | state->i2c = i2c; | |
497 | ||
498 | /* create dvb_frontend */ | |
499 | memcpy(&state->frontend.ops, &s921_ops, | |
500 | sizeof(struct dvb_frontend_ops)); | |
501 | state->frontend.demodulator_priv = state; | |
502 | ||
503 | return &state->frontend; | |
504 | ||
505 | rcor: | |
506 | kfree(state); | |
507 | ||
508 | return NULL; | |
509 | } | |
510 | EXPORT_SYMBOL(s921_attach); | |
511 | ||
512 | static struct dvb_frontend_ops s921_ops = { | |
16e3d131 | 513 | .delsys = { SYS_ISDBT }, |
3a509bb1 MCC |
514 | /* Use dib8000 values per default */ |
515 | .info = { | |
516 | .name = "Sharp S921", | |
517 | .type = FE_OFDM, | |
518 | .frequency_min = 470000000, | |
519 | /* | |
520 | * Max should be 770MHz instead, according with Sharp docs, | |
521 | * but Leadership doc says it works up to 806 MHz. This is | |
522 | * required to get channel 69, used in Brazil | |
523 | */ | |
524 | .frequency_max = 806000000, | |
525 | .frequency_tolerance = 0, | |
526 | .caps = FE_CAN_INVERSION_AUTO | | |
527 | FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | | |
528 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | | |
529 | FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | | |
530 | FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO | | |
531 | FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_RECOVER | | |
532 | FE_CAN_HIERARCHY_AUTO, | |
533 | }, | |
534 | ||
535 | .release = s921_release, | |
536 | ||
537 | .init = s921_initfe, | |
16e3d131 MCC |
538 | .set_frontend = s921_set_frontend, |
539 | .get_frontend = s921_get_frontend, | |
3a509bb1 MCC |
540 | .read_status = s921_read_status, |
541 | .read_signal_strength = s921_read_signal_strength, | |
542 | .tune = s921_tune, | |
543 | .get_frontend_algo = s921_get_algo, | |
544 | }; | |
545 | ||
546 | MODULE_DESCRIPTION("DVB Frontend module for Sharp S921 hardware"); | |
547 | MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>"); | |
548 | MODULE_AUTHOR("Douglas Landgraf <dougsland@redhat.com>"); | |
549 | MODULE_LICENSE("GPL"); |