1 /*
2 Driver for Philips TDA8083 based QPSK Demodulator
3
4 Copyright (C) 2001 Convergence Integrated Media GmbH
5
6 written by Ralph Metzler <ralph@convergence.de>
7
8 adoption to the new DVB frontend API and diagnostic ioctl's
9 by Holger Waechtler <holger@convergence.de>
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24
25 */
26
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
37 struct tda8083_state {
38 struct i2c_adapter* i2c;
39 /* configuration settings */
40 const struct tda8083_config* config;
41 struct dvb_frontend frontend;
42 };
43
44 static int debug;
45 #define dprintk(args...) \
46 do { \
47 if (debug) printk(KERN_DEBUG "tda8083: " args); \
48 } while (0)
49
50
51 static 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
61 static 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
76 static 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
91 static 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
100 static int tda8083_set_inversion (struct tda8083_state* state, fe_spectral_inversion_t inversion)
101 {
102 /* XXX FIXME: implement other modes than FEC_AUTO */
103 if (inversion == INVERSION_AUTO)
104 return 0;
105
106 return -EINVAL;
107 }
108
109 static int tda8083_set_fec (struct tda8083_state* state, fe_code_rate_t fec)
110 {
111 if (fec == FEC_AUTO)
112 return tda8083_writereg (state, 0x07, 0xff);
113
114 if (fec >= FEC_1_2 && fec <= FEC_8_9)
115 return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec));
116
117 return -EINVAL;
118 }
119
120 static fe_code_rate_t tda8083_get_fec (struct tda8083_state* state)
121 {
122 u8 index;
123 static fe_code_rate_t fec_tab [] = { FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4,
124 FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8 };
125
126 index = tda8083_readreg(state, 0x0e) & 0x07;
127
128 return fec_tab [index];
129 }
130
131 static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate)
132 {
133 u32 ratio;
134 u32 tmp;
135 u8 filter;
136
137 if (srate > 32000000)
138 srate = 32000000;
139 if (srate < 500000)
140 srate = 500000;
141
142 filter = 0;
143 if (srate < 24000000)
144 filter = 2;
145 if (srate < 16000000)
146 filter = 3;
147
148 tmp = 31250 << 16;
149 ratio = tmp / srate;
150
151 tmp = (tmp % srate) << 8;
152 ratio = (ratio << 8) + tmp / srate;
153
154 tmp = (tmp % srate) << 8;
155 ratio = (ratio << 8) + tmp / srate;
156
157 dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio);
158
159 tda8083_writereg (state, 0x05, filter);
160 tda8083_writereg (state, 0x02, (ratio >> 16) & 0xff);
161 tda8083_writereg (state, 0x03, (ratio >> 8) & 0xff);
162 tda8083_writereg (state, 0x04, (ratio ) & 0xff);
163
164 tda8083_writereg (state, 0x00, 0x3c);
165 tda8083_writereg (state, 0x00, 0x04);
166
167 return 1;
168 }
169
170 static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout)
171 {
172 unsigned long start = jiffies;
173
174 while (jiffies - start < timeout &&
175 !(tda8083_readreg(state, 0x02) & 0x80))
176 {
177 msleep(50);
178 };
179 }
180
181 static int tda8083_set_tone (struct tda8083_state* state, fe_sec_tone_mode_t tone)
182 {
183 tda8083_writereg (state, 0x26, 0xf1);
184
185 switch (tone) {
186 case SEC_TONE_OFF:
187 return tda8083_writereg (state, 0x29, 0x00);
188 case SEC_TONE_ON:
189 return tda8083_writereg (state, 0x29, 0x80);
190 default:
191 return -EINVAL;
192 };
193 }
194
195 static int tda8083_set_voltage (struct tda8083_state* state, fe_sec_voltage_t voltage)
196 {
197 switch (voltage) {
198 case SEC_VOLTAGE_13:
199 return tda8083_writereg (state, 0x20, 0x00);
200 case SEC_VOLTAGE_18:
201 return tda8083_writereg (state, 0x20, 0x11);
202 default:
203 return -EINVAL;
204 };
205 }
206
207 static int tda8083_send_diseqc_burst (struct tda8083_state* state, fe_sec_mini_cmd_t burst)
208 {
209 switch (burst) {
210 case SEC_MINI_A:
211 tda8083_writereg (state, 0x29, (5 << 2)); /* send burst A */
212 break;
213 case SEC_MINI_B:
214 tda8083_writereg (state, 0x29, (7 << 2)); /* send B */
215 break;
216 default:
217 return -EINVAL;
218 };
219
220 tda8083_wait_diseqc_fifo (state, 100);
221
222 return 0;
223 }
224
225 static int tda8083_send_diseqc_msg (struct dvb_frontend* fe,
226 struct dvb_diseqc_master_cmd *m)
227 {
228 struct tda8083_state* state = fe->demodulator_priv;
229 int i;
230
231 tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */
232
233 for (i=0; i<m->msg_len; i++)
234 tda8083_writereg (state, 0x23 + i, m->msg[i]);
235
236 tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */
237
238 tda8083_wait_diseqc_fifo (state, 100);
239
240 return 0;
241 }
242
243 static int tda8083_read_status(struct dvb_frontend* fe, fe_status_t* status)
244 {
245 struct tda8083_state* state = fe->demodulator_priv;
246
247 u8 signal = ~tda8083_readreg (state, 0x01);
248 u8 sync = tda8083_readreg (state, 0x02);
249
250 *status = 0;
251
252 if (signal > 10)
253 *status |= FE_HAS_SIGNAL;
254
255 if (sync & 0x01)
256 *status |= FE_HAS_CARRIER;
257
258 if (sync & 0x02)
259 *status |= FE_HAS_VITERBI;
260
261 if (sync & 0x10)
262 *status |= FE_HAS_SYNC;
263
264 if (sync & 0x20) /* frontend can not lock */
265 *status |= FE_TIMEDOUT;
266
267 if ((sync & 0x1f) == 0x1f)
268 *status |= FE_HAS_LOCK;
269
270 return 0;
271 }
272
273 static int tda8083_read_ber(struct dvb_frontend* fe, u32* ber)
274 {
275 struct tda8083_state* state = fe->demodulator_priv;
276 int ret;
277 u8 buf[3];
278
279 if ((ret = tda8083_readregs(state, 0x0b, buf, sizeof(buf))))
280 return ret;
281
282 *ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2];
283
284 return 0;
285 }
286
287 static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength)
288 {
289 struct tda8083_state* state = fe->demodulator_priv;
290
291 u8 signal = ~tda8083_readreg (state, 0x01);
292 *strength = (signal << 8) | signal;
293
294 return 0;
295 }
296
297 static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr)
298 {
299 struct tda8083_state* state = fe->demodulator_priv;
300
301 u8 _snr = tda8083_readreg (state, 0x08);
302 *snr = (_snr << 8) | _snr;
303
304 return 0;
305 }
306
307 static int tda8083_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
308 {
309 struct tda8083_state* state = fe->demodulator_priv;
310
311 *ucblocks = tda8083_readreg(state, 0x0f);
312 if (*ucblocks == 0xff)
313 *ucblocks = 0xffffffff;
314
315 return 0;
316 }
317
318 static int tda8083_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
319 {
320 struct tda8083_state* state = fe->demodulator_priv;
321
322 if (fe->ops.tuner_ops.set_params) {
323 fe->ops.tuner_ops.set_params(fe, p);
324 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
325 }
326
327 tda8083_set_inversion (state, p->inversion);
328 tda8083_set_fec (state, p->u.qpsk.fec_inner);
329 tda8083_set_symbolrate (state, p->u.qpsk.symbol_rate);
330
331 tda8083_writereg (state, 0x00, 0x3c);
332 tda8083_writereg (state, 0x00, 0x04);
333
334 return 0;
335 }
336
337 static int tda8083_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
338 {
339 struct tda8083_state* state = fe->demodulator_priv;
340
341 /* FIXME: get symbolrate & frequency offset...*/
342 /*p->frequency = ???;*/
343 p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ?
344 INVERSION_ON : INVERSION_OFF;
345 p->u.qpsk.fec_inner = tda8083_get_fec (state);
346 /*p->u.qpsk.symbol_rate = tda8083_get_symbolrate (state);*/
347
348 return 0;
349 }
350
351 static int tda8083_sleep(struct dvb_frontend* fe)
352 {
353 struct tda8083_state* state = fe->demodulator_priv;
354
355 tda8083_writereg (state, 0x00, 0x02);
356 return 0;
357 }
358
359 static int tda8083_init(struct dvb_frontend* fe)
360 {
361 struct tda8083_state* state = fe->demodulator_priv;
362 int i;
363
364 for (i=0; i<44; i++)
365 tda8083_writereg (state, i, tda8083_init_tab[i]);
366
367 tda8083_writereg (state, 0x00, 0x3c);
368 tda8083_writereg (state, 0x00, 0x04);
369
370 return 0;
371 }
372
373 static int tda8083_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
374 {
375 struct tda8083_state* state = fe->demodulator_priv;
376
377 tda8083_send_diseqc_burst (state, burst);
378 tda8083_writereg (state, 0x00, 0x3c);
379 tda8083_writereg (state, 0x00, 0x04);
380
381 return 0;
382 }
383
384 static int tda8083_diseqc_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
385 {
386 struct tda8083_state* state = fe->demodulator_priv;
387
388 tda8083_set_tone (state, tone);
389 tda8083_writereg (state, 0x00, 0x3c);
390 tda8083_writereg (state, 0x00, 0x04);
391
392 return 0;
393 }
394
395 static int tda8083_diseqc_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
396 {
397 struct tda8083_state* state = fe->demodulator_priv;
398
399 tda8083_set_voltage (state, voltage);
400 tda8083_writereg (state, 0x00, 0x3c);
401 tda8083_writereg (state, 0x00, 0x04);
402
403 return 0;
404 }
405
406 static void tda8083_release(struct dvb_frontend* fe)
407 {
408 struct tda8083_state* state = fe->demodulator_priv;
409 kfree(state);
410 }
411
412 static struct dvb_frontend_ops tda8083_ops;
413
414 struct dvb_frontend* tda8083_attach(const struct tda8083_config* config,
415 struct i2c_adapter* i2c)
416 {
417 struct tda8083_state* state = NULL;
418
419 /* allocate memory for the internal state */
420 state = kzalloc(sizeof(struct tda8083_state), GFP_KERNEL);
421 if (state == NULL) goto error;
422
423 /* setup the state */
424 state->config = config;
425 state->i2c = i2c;
426
427 /* check if the demod is there */
428 if ((tda8083_readreg(state, 0x00)) != 0x05) goto error;
429
430 /* create dvb_frontend */
431 memcpy(&state->frontend.ops, &tda8083_ops, sizeof(struct dvb_frontend_ops));
432 state->frontend.demodulator_priv = state;
433 return &state->frontend;
434
435 error:
436 kfree(state);
437 return NULL;
438 }
439
440 static struct dvb_frontend_ops tda8083_ops = {
441
442 .info = {
443 .name = "Philips TDA8083 DVB-S",
444 .type = FE_QPSK,
445 .frequency_min = 920000, /* TDA8060 */
446 .frequency_max = 2200000, /* TDA8060 */
447 .frequency_stepsize = 125, /* kHz for QPSK frontends */
448 /* .frequency_tolerance = ???,*/
449 .symbol_rate_min = 12000000,
450 .symbol_rate_max = 30000000,
451 /* .symbol_rate_tolerance = ???,*/
452 .caps = FE_CAN_INVERSION_AUTO |
453 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
454 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
455 FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
456 FE_CAN_QPSK | FE_CAN_MUTE_TS
457 },
458
459 .release = tda8083_release,
460
461 .init = tda8083_init,
462 .sleep = tda8083_sleep,
463
464 .set_frontend = tda8083_set_frontend,
465 .get_frontend = tda8083_get_frontend,
466
467 .read_status = tda8083_read_status,
468 .read_signal_strength = tda8083_read_signal_strength,
469 .read_snr = tda8083_read_snr,
470 .read_ber = tda8083_read_ber,
471 .read_ucblocks = tda8083_read_ucblocks,
472
473 .diseqc_send_master_cmd = tda8083_send_diseqc_msg,
474 .diseqc_send_burst = tda8083_diseqc_send_burst,
475 .set_tone = tda8083_diseqc_set_tone,
476 .set_voltage = tda8083_diseqc_set_voltage,
477 };
478
479 module_param(debug, int, 0644);
480 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
481
482 MODULE_DESCRIPTION("Philips TDA8083 DVB-S Demodulator");
483 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler");
484 MODULE_LICENSE("GPL");
485
486 EXPORT_SYMBOL(tda8083_attach);
487
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