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27#include <linux/init.h>
28#include <linux/kernel.h>
29#include <linux/module.h>
30#include <linux/string.h>
31#include <linux/slab.h>
32#include <linux/jiffies.h>
33#include "dvb_frontend.h"
34#include "tda8083.h"
35
36
37struct tda8083_state {
38 struct i2c_adapter* i2c;
39
40 const struct tda8083_config* config;
41 struct dvb_frontend frontend;
42};
43
44static int debug;
45#define dprintk(args...) \
46 do { \
47 if (debug) printk(KERN_DEBUG "tda8083: " args); \
48 } while (0)
49
50
51static u8 tda8083_init_tab [] = {
52 0x04, 0x00, 0x4a, 0x79, 0x04, 0x00, 0xff, 0xea,
53 0x48, 0x42, 0x79, 0x60, 0x70, 0x52, 0x9a, 0x10,
54 0x0e, 0x10, 0xf2, 0xa7, 0x93, 0x0b, 0x05, 0xc8,
55 0x9d, 0x00, 0x42, 0x80, 0x00, 0x60, 0x40, 0x00,
56 0x00, 0x75, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00,
57 0x00, 0x00, 0x00, 0x00
58};
59
60
61static int tda8083_writereg (struct tda8083_state* state, u8 reg, u8 data)
62{
63 int ret;
64 u8 buf [] = { reg, data };
65 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
66
67 ret = i2c_transfer(state->i2c, &msg, 1);
68
69 if (ret != 1)
70 dprintk ("%s: writereg error (reg %02x, ret == %i)\n",
71 __func__, reg, ret);
72
73 return (ret != 1) ? -1 : 0;
74}
75
76static int tda8083_readregs (struct tda8083_state* state, u8 reg1, u8 *b, u8 len)
77{
78 int ret;
79 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = ®1, .len = 1 },
80 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
81
82 ret = i2c_transfer(state->i2c, msg, 2);
83
84 if (ret != 2)
85 dprintk ("%s: readreg error (reg %02x, ret == %i)\n",
86 __func__, reg1, ret);
87
88 return ret == 2 ? 0 : -1;
89}
90
91static inline u8 tda8083_readreg (struct tda8083_state* state, u8 reg)
92{
93 u8 val;
94
95 tda8083_readregs (state, reg, &val, 1);
96
97 return val;
98}
99
100static int tda8083_set_inversion(struct tda8083_state *state,
101 enum fe_spectral_inversion inversion)
102{
103
104 if (inversion == INVERSION_AUTO)
105 return 0;
106
107 return -EINVAL;
108}
109
110static int tda8083_set_fec(struct tda8083_state *state, enum fe_code_rate fec)
111{
112 if (fec == FEC_AUTO)
113 return tda8083_writereg (state, 0x07, 0xff);
114
115 if (fec >= FEC_1_2 && fec <= FEC_8_9)
116 return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec));
117
118 return -EINVAL;
119}
120
121static enum fe_code_rate tda8083_get_fec(struct tda8083_state *state)
122{
123 u8 index;
124 static enum fe_code_rate fec_tab[] = {
125 FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4,
126 FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8
127 };
128
129 index = tda8083_readreg(state, 0x0e) & 0x07;
130
131 return fec_tab [index];
132}
133
134static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate)
135{
136 u32 ratio;
137 u32 tmp;
138 u8 filter;
139
140 if (srate > 32000000)
141 srate = 32000000;
142 if (srate < 500000)
143 srate = 500000;
144
145 filter = 0;
146 if (srate < 24000000)
147 filter = 2;
148 if (srate < 16000000)
149 filter = 3;
150
151 tmp = 31250 << 16;
152 ratio = tmp / srate;
153
154 tmp = (tmp % srate) << 8;
155 ratio = (ratio << 8) + tmp / srate;
156
157 tmp = (tmp % srate) << 8;
158 ratio = (ratio << 8) + tmp / srate;
159
160 dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio);
161
162 tda8083_writereg (state, 0x05, filter);
163 tda8083_writereg (state, 0x02, (ratio >> 16) & 0xff);
164 tda8083_writereg (state, 0x03, (ratio >> 8) & 0xff);
165 tda8083_writereg (state, 0x04, (ratio ) & 0xff);
166
167 tda8083_writereg (state, 0x00, 0x3c);
168 tda8083_writereg (state, 0x00, 0x04);
169
170 return 1;
171}
172
173static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout)
174{
175 unsigned long start = jiffies;
176
177 while (jiffies - start < timeout &&
178 !(tda8083_readreg(state, 0x02) & 0x80))
179 {
180 msleep(50);
181 }
182}
183
184static int tda8083_set_tone(struct tda8083_state *state,
185 enum fe_sec_tone_mode tone)
186{
187 tda8083_writereg (state, 0x26, 0xf1);
188
189 switch (tone) {
190 case SEC_TONE_OFF:
191 return tda8083_writereg (state, 0x29, 0x00);
192 case SEC_TONE_ON:
193 return tda8083_writereg (state, 0x29, 0x80);
194 default:
195 return -EINVAL;
196 }
197}
198
199static int tda8083_set_voltage(struct tda8083_state *state,
200 enum fe_sec_voltage voltage)
201{
202 switch (voltage) {
203 case SEC_VOLTAGE_13:
204 return tda8083_writereg (state, 0x20, 0x00);
205 case SEC_VOLTAGE_18:
206 return tda8083_writereg (state, 0x20, 0x11);
207 default:
208 return -EINVAL;
209 }
210}
211
212static int tda8083_send_diseqc_burst(struct tda8083_state *state,
213 enum fe_sec_mini_cmd burst)
214{
215 switch (burst) {
216 case SEC_MINI_A:
217 tda8083_writereg (state, 0x29, (5 << 2));
218 break;
219 case SEC_MINI_B:
220 tda8083_writereg (state, 0x29, (7 << 2));
221 break;
222 default:
223 return -EINVAL;
224 }
225
226 tda8083_wait_diseqc_fifo (state, 100);
227
228 return 0;
229}
230
231static int tda8083_send_diseqc_msg(struct dvb_frontend *fe,
232 struct dvb_diseqc_master_cmd *m)
233{
234 struct tda8083_state* state = fe->demodulator_priv;
235 int i;
236
237 tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2));
238
239 for (i=0; i<m->msg_len; i++)
240 tda8083_writereg (state, 0x23 + i, m->msg[i]);
241
242 tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2));
243
244 tda8083_wait_diseqc_fifo (state, 100);
245
246 return 0;
247}
248
249static int tda8083_read_status(struct dvb_frontend *fe,
250 enum fe_status *status)
251{
252 struct tda8083_state* state = fe->demodulator_priv;
253
254 u8 signal = ~tda8083_readreg (state, 0x01);
255 u8 sync = tda8083_readreg (state, 0x02);
256
257 *status = 0;
258
259 if (signal > 10)
260 *status |= FE_HAS_SIGNAL;
261
262 if (sync & 0x01)
263 *status |= FE_HAS_CARRIER;
264
265 if (sync & 0x02)
266 *status |= FE_HAS_VITERBI;
267
268 if (sync & 0x10)
269 *status |= FE_HAS_SYNC;
270
271 if (sync & 0x20)
272 *status |= FE_TIMEDOUT;
273
274 if ((sync & 0x1f) == 0x1f)
275 *status |= FE_HAS_LOCK;
276
277 return 0;
278}
279
280static int tda8083_read_ber(struct dvb_frontend* fe, u32* ber)
281{
282 struct tda8083_state* state = fe->demodulator_priv;
283 int ret;
284 u8 buf[3];
285
286 if ((ret = tda8083_readregs(state, 0x0b, buf, sizeof(buf))))
287 return ret;
288
289 *ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2];
290
291 return 0;
292}
293
294static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength)
295{
296 struct tda8083_state* state = fe->demodulator_priv;
297
298 u8 signal = ~tda8083_readreg (state, 0x01);
299 *strength = (signal << 8) | signal;
300
301 return 0;
302}
303
304static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr)
305{
306 struct tda8083_state* state = fe->demodulator_priv;
307
308 u8 _snr = tda8083_readreg (state, 0x08);
309 *snr = (_snr << 8) | _snr;
310
311 return 0;
312}
313
314static int tda8083_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
315{
316 struct tda8083_state* state = fe->demodulator_priv;
317
318 *ucblocks = tda8083_readreg(state, 0x0f);
319 if (*ucblocks == 0xff)
320 *ucblocks = 0xffffffff;
321
322 return 0;
323}
324
325static int tda8083_set_frontend(struct dvb_frontend *fe)
326{
327 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
328 struct tda8083_state* state = fe->demodulator_priv;
329
330 if (fe->ops.tuner_ops.set_params) {
331 fe->ops.tuner_ops.set_params(fe);
332 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
333 }
334
335 tda8083_set_inversion (state, p->inversion);
336 tda8083_set_fec(state, p->fec_inner);
337 tda8083_set_symbolrate(state, p->symbol_rate);
338
339 tda8083_writereg (state, 0x00, 0x3c);
340 tda8083_writereg (state, 0x00, 0x04);
341
342 return 0;
343}
344
345static int tda8083_get_frontend(struct dvb_frontend *fe,
346 struct dtv_frontend_properties *p)
347{
348 struct tda8083_state* state = fe->demodulator_priv;
349
350
351
352 p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ?
353 INVERSION_ON : INVERSION_OFF;
354 p->fec_inner = tda8083_get_fec(state);
355
356
357 return 0;
358}
359
360static int tda8083_sleep(struct dvb_frontend* fe)
361{
362 struct tda8083_state* state = fe->demodulator_priv;
363
364 tda8083_writereg (state, 0x00, 0x02);
365 return 0;
366}
367
368static int tda8083_init(struct dvb_frontend* fe)
369{
370 struct tda8083_state* state = fe->demodulator_priv;
371 int i;
372
373 for (i=0; i<44; i++)
374 tda8083_writereg (state, i, tda8083_init_tab[i]);
375
376 tda8083_writereg (state, 0x00, 0x3c);
377 tda8083_writereg (state, 0x00, 0x04);
378
379 return 0;
380}
381
382static int tda8083_diseqc_send_burst(struct dvb_frontend *fe,
383 enum fe_sec_mini_cmd burst)
384{
385 struct tda8083_state* state = fe->demodulator_priv;
386
387 tda8083_send_diseqc_burst (state, burst);
388 tda8083_writereg (state, 0x00, 0x3c);
389 tda8083_writereg (state, 0x00, 0x04);
390
391 return 0;
392}
393
394static int tda8083_diseqc_set_tone(struct dvb_frontend *fe,
395 enum fe_sec_tone_mode tone)
396{
397 struct tda8083_state* state = fe->demodulator_priv;
398
399 tda8083_set_tone (state, tone);
400 tda8083_writereg (state, 0x00, 0x3c);
401 tda8083_writereg (state, 0x00, 0x04);
402
403 return 0;
404}
405
406static int tda8083_diseqc_set_voltage(struct dvb_frontend *fe,
407 enum fe_sec_voltage voltage)
408{
409 struct tda8083_state* state = fe->demodulator_priv;
410
411 tda8083_set_voltage (state, voltage);
412 tda8083_writereg (state, 0x00, 0x3c);
413 tda8083_writereg (state, 0x00, 0x04);
414
415 return 0;
416}
417
418static void tda8083_release(struct dvb_frontend* fe)
419{
420 struct tda8083_state* state = fe->demodulator_priv;
421 kfree(state);
422}
423
424static struct dvb_frontend_ops tda8083_ops;
425
426struct dvb_frontend* tda8083_attach(const struct tda8083_config* config,
427 struct i2c_adapter* i2c)
428{
429 struct tda8083_state* state = NULL;
430
431
432 state = kzalloc(sizeof(struct tda8083_state), GFP_KERNEL);
433 if (state == NULL) goto error;
434
435
436 state->config = config;
437 state->i2c = i2c;
438
439
440 if ((tda8083_readreg(state, 0x00)) != 0x05) goto error;
441
442
443 memcpy(&state->frontend.ops, &tda8083_ops, sizeof(struct dvb_frontend_ops));
444 state->frontend.demodulator_priv = state;
445 return &state->frontend;
446
447error:
448 kfree(state);
449 return NULL;
450}
451
452static struct dvb_frontend_ops tda8083_ops = {
453 .delsys = { SYS_DVBS },
454 .info = {
455 .name = "Philips TDA8083 DVB-S",
456 .frequency_min = 920000,
457 .frequency_max = 2200000,
458 .frequency_stepsize = 125,
459
460 .symbol_rate_min = 12000000,
461 .symbol_rate_max = 30000000,
462
463 .caps = FE_CAN_INVERSION_AUTO |
464 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
465 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
466 FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
467 FE_CAN_QPSK | FE_CAN_MUTE_TS
468 },
469
470 .release = tda8083_release,
471
472 .init = tda8083_init,
473 .sleep = tda8083_sleep,
474
475 .set_frontend = tda8083_set_frontend,
476 .get_frontend = tda8083_get_frontend,
477
478 .read_status = tda8083_read_status,
479 .read_signal_strength = tda8083_read_signal_strength,
480 .read_snr = tda8083_read_snr,
481 .read_ber = tda8083_read_ber,
482 .read_ucblocks = tda8083_read_ucblocks,
483
484 .diseqc_send_master_cmd = tda8083_send_diseqc_msg,
485 .diseqc_send_burst = tda8083_diseqc_send_burst,
486 .set_tone = tda8083_diseqc_set_tone,
487 .set_voltage = tda8083_diseqc_set_voltage,
488};
489
490module_param(debug, int, 0644);
491MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
492
493MODULE_DESCRIPTION("Philips TDA8083 DVB-S Demodulator");
494MODULE_AUTHOR("Ralph Metzler, Holger Waechtler");
495MODULE_LICENSE("GPL");
496
497EXPORT_SYMBOL(tda8083_attach);
498
