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13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/string.h>
17#include <linux/slab.h>
18#include <linux/delay.h>
19
20#include <media/dvb_frontend.h>
21#include "ves1x93.h"
22
23
24struct ves1x93_state {
25 struct i2c_adapter* i2c;
26
27 const struct ves1x93_config* config;
28 struct dvb_frontend frontend;
29
30
31 enum fe_spectral_inversion inversion;
32 u8 *init_1x93_tab;
33 u8 *init_1x93_wtab;
34 u8 tab_size;
35 u8 demod_type;
36 u32 frequency;
37};
38
39static int debug;
40#define dprintk if (debug) printk
41
42#define DEMOD_VES1893 0
43#define DEMOD_VES1993 1
44
45static u8 init_1893_tab [] = {
46 0x01, 0xa4, 0x35, 0x80, 0x2a, 0x0b, 0x55, 0xc4,
47 0x09, 0x69, 0x00, 0x86, 0x4c, 0x28, 0x7f, 0x00,
48 0x00, 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
49 0x80, 0x00, 0x21, 0xb0, 0x14, 0x00, 0xdc, 0x00,
50 0x81, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
51 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
52 0x00, 0x55, 0x00, 0x00, 0x7f, 0x00
53};
54
55static u8 init_1993_tab [] = {
56 0x00, 0x9c, 0x35, 0x80, 0x6a, 0x09, 0x72, 0x8c,
57 0x09, 0x6b, 0x00, 0x00, 0x4c, 0x08, 0x00, 0x00,
58 0x00, 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
59 0x80, 0x40, 0x21, 0xb0, 0x00, 0x00, 0x00, 0x10,
60 0x81, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
61 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00,
62 0x00, 0x55, 0x03, 0x00, 0x00, 0x00, 0x00, 0x03,
63 0x00, 0x00, 0x0e, 0x80, 0x00
64};
65
66static u8 init_1893_wtab[] =
67{
68 1,1,1,1,1,1,1,1, 1,1,0,0,1,1,0,0,
69 0,1,0,0,0,0,0,0, 1,0,1,1,0,0,0,1,
70 1,1,1,0,0,0,0,0, 0,0,1,1,0,0,0,0,
71 1,1,1,0,1,1
72};
73
74static u8 init_1993_wtab[] =
75{
76 1,1,1,1,1,1,1,1, 1,1,0,0,1,1,0,0,
77 0,1,0,0,0,0,0,0, 1,1,1,1,0,0,0,1,
78 1,1,1,0,0,0,0,0, 0,0,1,1,0,0,0,0,
79 1,1,1,0,1,1,1,1, 1,1,1,1,1
80};
81
82static int ves1x93_writereg (struct ves1x93_state* state, u8 reg, u8 data)
83{
84 u8 buf [] = { 0x00, reg, data };
85 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 3 };
86 int err;
87
88 if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
89 dprintk ("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n", __func__, err, reg, data);
90 return -EREMOTEIO;
91 }
92
93 return 0;
94}
95
96static u8 ves1x93_readreg (struct ves1x93_state* state, u8 reg)
97{
98 int ret;
99 u8 b0 [] = { 0x00, reg };
100 u8 b1 [] = { 0 };
101 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 2 },
102 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
103
104 ret = i2c_transfer (state->i2c, msg, 2);
105
106 if (ret != 2) return ret;
107
108 return b1[0];
109}
110
111static int ves1x93_clr_bit (struct ves1x93_state* state)
112{
113 msleep(10);
114 ves1x93_writereg (state, 0, state->init_1x93_tab[0] & 0xfe);
115 ves1x93_writereg (state, 0, state->init_1x93_tab[0]);
116 msleep(50);
117 return 0;
118}
119
120static int ves1x93_set_inversion(struct ves1x93_state *state,
121 enum fe_spectral_inversion inversion)
122{
123 u8 val;
124
125
126
127
128
129
130 switch (inversion) {
131 case INVERSION_OFF:
132 val = 0xc0;
133 break;
134 case INVERSION_ON:
135 val = 0x80;
136 break;
137 case INVERSION_AUTO:
138 val = 0x00;
139 break;
140 default:
141 return -EINVAL;
142 }
143
144 return ves1x93_writereg (state, 0x0c, (state->init_1x93_tab[0x0c] & 0x3f) | val);
145}
146
147static int ves1x93_set_fec(struct ves1x93_state *state, enum fe_code_rate fec)
148{
149 if (fec == FEC_AUTO)
150 return ves1x93_writereg (state, 0x0d, 0x08);
151 else if (fec < FEC_1_2 || fec > FEC_8_9)
152 return -EINVAL;
153 else
154 return ves1x93_writereg (state, 0x0d, fec - FEC_1_2);
155}
156
157static enum fe_code_rate ves1x93_get_fec(struct ves1x93_state *state)
158{
159 return FEC_1_2 + ((ves1x93_readreg (state, 0x0d) >> 4) & 0x7);
160}
161
162static int ves1x93_set_symbolrate (struct ves1x93_state* state, u32 srate)
163{
164 u32 BDR;
165 u32 ratio;
166 u8 ADCONF, FCONF, FNR, AGCR;
167 u32 BDRI;
168 u32 tmp;
169 u32 FIN;
170
171 dprintk("%s: srate == %d\n", __func__, (unsigned int) srate);
172
173 if (srate > state->config->xin/2)
174 srate = state->config->xin/2;
175
176 if (srate < 500000)
177 srate = 500000;
178
179#define MUL (1UL<<26)
180
181 FIN = (state->config->xin + 6000) >> 4;
182
183 tmp = srate << 6;
184 ratio = tmp / FIN;
185
186 tmp = (tmp % FIN) << 8;
187 ratio = (ratio << 8) + tmp / FIN;
188
189 tmp = (tmp % FIN) << 8;
190 ratio = (ratio << 8) + tmp / FIN;
191
192 FNR = 0xff;
193
194 if (ratio < MUL/3) FNR = 0;
195 if (ratio < (MUL*11)/50) FNR = 1;
196 if (ratio < MUL/6) FNR = 2;
197 if (ratio < MUL/9) FNR = 3;
198 if (ratio < MUL/12) FNR = 4;
199 if (ratio < (MUL*11)/200) FNR = 5;
200 if (ratio < MUL/24) FNR = 6;
201 if (ratio < (MUL*27)/1000) FNR = 7;
202 if (ratio < MUL/48) FNR = 8;
203 if (ratio < (MUL*137)/10000) FNR = 9;
204
205 if (FNR == 0xff) {
206 ADCONF = 0x89;
207 FCONF = 0x80;
208 FNR = 0;
209 } else {
210 ADCONF = 0x81;
211 FCONF = 0x88 | (FNR >> 1) | ((FNR & 0x01) << 5);
212
213 }
214
215 BDR = (( (ratio << (FNR >> 1)) >> 4) + 1) >> 1;
216 BDRI = ( ((FIN << 8) / ((srate << (FNR >> 1)) >> 2)) + 1) >> 1;
217
218 dprintk("FNR= %d\n", FNR);
219 dprintk("ratio= %08x\n", (unsigned int) ratio);
220 dprintk("BDR= %08x\n", (unsigned int) BDR);
221 dprintk("BDRI= %02x\n", (unsigned int) BDRI);
222
223 if (BDRI > 0xff)
224 BDRI = 0xff;
225
226 ves1x93_writereg (state, 0x06, 0xff & BDR);
227 ves1x93_writereg (state, 0x07, 0xff & (BDR >> 8));
228 ves1x93_writereg (state, 0x08, 0x0f & (BDR >> 16));
229
230 ves1x93_writereg (state, 0x09, BDRI);
231 ves1x93_writereg (state, 0x20, ADCONF);
232 ves1x93_writereg (state, 0x21, FCONF);
233
234 AGCR = state->init_1x93_tab[0x05];
235 if (state->config->invert_pwm)
236 AGCR |= 0x20;
237
238 if (srate < 6000000)
239 AGCR |= 0x80;
240 else
241 AGCR &= ~0x80;
242
243 ves1x93_writereg (state, 0x05, AGCR);
244
245
246 if (state->demod_type != DEMOD_VES1993)
247 ves1x93_clr_bit (state);
248
249 return 0;
250}
251
252static int ves1x93_init (struct dvb_frontend* fe)
253{
254 struct ves1x93_state* state = fe->demodulator_priv;
255 int i;
256 int val;
257
258 dprintk("%s: init chip\n", __func__);
259
260 for (i = 0; i < state->tab_size; i++) {
261 if (state->init_1x93_wtab[i]) {
262 val = state->init_1x93_tab[i];
263
264 if (state->config->invert_pwm && (i == 0x05)) val |= 0x20;
265 ves1x93_writereg (state, i, val);
266 }
267 }
268
269 return 0;
270}
271
272static int ves1x93_set_voltage(struct dvb_frontend *fe,
273 enum fe_sec_voltage voltage)
274{
275 struct ves1x93_state* state = fe->demodulator_priv;
276
277 switch (voltage) {
278 case SEC_VOLTAGE_13:
279 return ves1x93_writereg (state, 0x1f, 0x20);
280 case SEC_VOLTAGE_18:
281 return ves1x93_writereg (state, 0x1f, 0x30);
282 case SEC_VOLTAGE_OFF:
283 return ves1x93_writereg (state, 0x1f, 0x00);
284 default:
285 return -EINVAL;
286 }
287}
288
289static int ves1x93_read_status(struct dvb_frontend *fe,
290 enum fe_status *status)
291{
292 struct ves1x93_state* state = fe->demodulator_priv;
293
294 u8 sync = ves1x93_readreg (state, 0x0e);
295
296
297
298
299
300
301
302
303
304
305 int maxtry = 10;
306 while ((sync & 0x03) != 0x03 && (sync & 0x0c) && maxtry--) {
307 msleep(10);
308 sync = ves1x93_readreg (state, 0x0e);
309 }
310
311 *status = 0;
312
313 if (sync & 1)
314 *status |= FE_HAS_SIGNAL;
315
316 if (sync & 2)
317 *status |= FE_HAS_CARRIER;
318
319 if (sync & 4)
320 *status |= FE_HAS_VITERBI;
321
322 if (sync & 8)
323 *status |= FE_HAS_SYNC;
324
325 if ((sync & 0x1f) == 0x1f)
326 *status |= FE_HAS_LOCK;
327
328 return 0;
329}
330
331static int ves1x93_read_ber(struct dvb_frontend* fe, u32* ber)
332{
333 struct ves1x93_state* state = fe->demodulator_priv;
334
335 *ber = ves1x93_readreg (state, 0x15);
336 *ber |= (ves1x93_readreg (state, 0x16) << 8);
337 *ber |= ((ves1x93_readreg (state, 0x17) & 0x0F) << 16);
338 *ber *= 10;
339
340 return 0;
341}
342
343static int ves1x93_read_signal_strength(struct dvb_frontend* fe, u16* strength)
344{
345 struct ves1x93_state* state = fe->demodulator_priv;
346
347 u8 signal = ~ves1x93_readreg (state, 0x0b);
348 *strength = (signal << 8) | signal;
349
350 return 0;
351}
352
353static int ves1x93_read_snr(struct dvb_frontend* fe, u16* snr)
354{
355 struct ves1x93_state* state = fe->demodulator_priv;
356
357 u8 _snr = ~ves1x93_readreg (state, 0x1c);
358 *snr = (_snr << 8) | _snr;
359
360 return 0;
361}
362
363static int ves1x93_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
364{
365 struct ves1x93_state* state = fe->demodulator_priv;
366
367 *ucblocks = ves1x93_readreg (state, 0x18) & 0x7f;
368
369 if (*ucblocks == 0x7f)
370 *ucblocks = 0xffffffff;
371
372 ves1x93_writereg (state, 0x18, 0x00);
373 ves1x93_writereg (state, 0x18, 0x80);
374
375 return 0;
376}
377
378static int ves1x93_set_frontend(struct dvb_frontend *fe)
379{
380 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
381 struct ves1x93_state* state = fe->demodulator_priv;
382
383 if (fe->ops.tuner_ops.set_params) {
384 fe->ops.tuner_ops.set_params(fe);
385 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
386 }
387 ves1x93_set_inversion (state, p->inversion);
388 ves1x93_set_fec(state, p->fec_inner);
389 ves1x93_set_symbolrate(state, p->symbol_rate);
390 state->inversion = p->inversion;
391 state->frequency = p->frequency;
392
393 return 0;
394}
395
396static int ves1x93_get_frontend(struct dvb_frontend *fe,
397 struct dtv_frontend_properties *p)
398{
399 struct ves1x93_state* state = fe->demodulator_priv;
400 int afc;
401
402 afc = ((int)((char)(ves1x93_readreg (state, 0x0a) << 1)))/2;
403 afc = (afc * (int)(p->symbol_rate/1000/8))/16;
404
405 p->frequency = state->frequency - afc;
406
407
408
409
410
411 if (state->inversion == INVERSION_AUTO)
412 p->inversion = (ves1x93_readreg (state, 0x0f) & 2) ?
413 INVERSION_OFF : INVERSION_ON;
414 p->fec_inner = ves1x93_get_fec(state);
415
416
417 return 0;
418}
419
420static int ves1x93_sleep(struct dvb_frontend* fe)
421{
422 struct ves1x93_state* state = fe->demodulator_priv;
423
424 return ves1x93_writereg (state, 0x00, 0x08);
425}
426
427static void ves1x93_release(struct dvb_frontend* fe)
428{
429 struct ves1x93_state* state = fe->demodulator_priv;
430 kfree(state);
431}
432
433static int ves1x93_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
434{
435 struct ves1x93_state* state = fe->demodulator_priv;
436
437 if (enable) {
438 return ves1x93_writereg(state, 0x00, 0x11);
439 } else {
440 return ves1x93_writereg(state, 0x00, 0x01);
441 }
442}
443
444static const struct dvb_frontend_ops ves1x93_ops;
445
446struct dvb_frontend* ves1x93_attach(const struct ves1x93_config* config,
447 struct i2c_adapter* i2c)
448{
449 struct ves1x93_state* state = NULL;
450 u8 identity;
451
452
453 state = kzalloc(sizeof(struct ves1x93_state), GFP_KERNEL);
454 if (state == NULL) goto error;
455
456
457 state->config = config;
458 state->i2c = i2c;
459 state->inversion = INVERSION_OFF;
460
461
462 identity = ves1x93_readreg(state, 0x1e);
463 switch (identity) {
464 case 0xdc:
465 printk("ves1x93: Detected ves1893a rev1\n");
466 state->demod_type = DEMOD_VES1893;
467 state->init_1x93_tab = init_1893_tab;
468 state->init_1x93_wtab = init_1893_wtab;
469 state->tab_size = sizeof(init_1893_tab);
470 break;
471
472 case 0xdd:
473 printk("ves1x93: Detected ves1893a rev2\n");
474 state->demod_type = DEMOD_VES1893;
475 state->init_1x93_tab = init_1893_tab;
476 state->init_1x93_wtab = init_1893_wtab;
477 state->tab_size = sizeof(init_1893_tab);
478 break;
479
480 case 0xde:
481 printk("ves1x93: Detected ves1993\n");
482 state->demod_type = DEMOD_VES1993;
483 state->init_1x93_tab = init_1993_tab;
484 state->init_1x93_wtab = init_1993_wtab;
485 state->tab_size = sizeof(init_1993_tab);
486 break;
487
488 default:
489 goto error;
490 }
491
492
493 memcpy(&state->frontend.ops, &ves1x93_ops, sizeof(struct dvb_frontend_ops));
494 state->frontend.demodulator_priv = state;
495 return &state->frontend;
496
497error:
498 kfree(state);
499 return NULL;
500}
501
502static const struct dvb_frontend_ops ves1x93_ops = {
503 .delsys = { SYS_DVBS },
504 .info = {
505 .name = "VLSI VES1x93 DVB-S",
506 .frequency_min_hz = 950 * MHz,
507 .frequency_max_hz = 2150 * MHz,
508 .frequency_stepsize_hz = 125 * kHz,
509 .frequency_tolerance_hz = 29500 * kHz,
510 .symbol_rate_min = 1000000,
511 .symbol_rate_max = 45000000,
512
513 .caps = FE_CAN_INVERSION_AUTO |
514 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
515 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
516 FE_CAN_QPSK
517 },
518
519 .release = ves1x93_release,
520
521 .init = ves1x93_init,
522 .sleep = ves1x93_sleep,
523 .i2c_gate_ctrl = ves1x93_i2c_gate_ctrl,
524
525 .set_frontend = ves1x93_set_frontend,
526 .get_frontend = ves1x93_get_frontend,
527
528 .read_status = ves1x93_read_status,
529 .read_ber = ves1x93_read_ber,
530 .read_signal_strength = ves1x93_read_signal_strength,
531 .read_snr = ves1x93_read_snr,
532 .read_ucblocks = ves1x93_read_ucblocks,
533
534 .set_voltage = ves1x93_set_voltage,
535};
536
537module_param(debug, int, 0644);
538
539MODULE_DESCRIPTION("VLSI VES1x93 DVB-S Demodulator driver");
540MODULE_AUTHOR("Ralph Metzler");
541MODULE_LICENSE("GPL");
542
543EXPORT_SYMBOL(ves1x93_attach);
544
