2 Driver for Philips TDA8083 based QPSK Demodulator
4 Copyright (C) 2001 Convergence Integrated Media GmbH
6 written by Ralph Metzler <ralph@convergence.de>
8 adoption to the new DVB frontend API and diagnostic ioctl's
9 by Holger Waechtler <holger@convergence.de>
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.
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.
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.
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"
37 struct tda8083_state {
38 struct i2c_adapter* i2c;
39 /* configuration settings */
40 const struct tda8083_config* config;
41 struct dvb_frontend frontend;
45 #define dprintk(args...) \
47 if (debug) printk(KERN_DEBUG "tda8083: " args); \
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
61 static int tda8083_writereg (struct tda8083_state* state, u8 reg, u8 data)
64 u8 buf [] = { reg, data };
65 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
67 ret = i2c_transfer(state->i2c, &msg, 1);
70 dprintk ("%s: writereg error (reg %02x, ret == %i)\n",
73 return (ret != 1) ? -1 : 0;
76 static int tda8083_readregs (struct tda8083_state* state, u8 reg1, u8 *b, u8 len)
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 } };
82 ret = i2c_transfer(state->i2c, msg, 2);
85 dprintk ("%s: readreg error (reg %02x, ret == %i)\n",
88 return ret == 2 ? 0 : -1;
91 static inline u8 tda8083_readreg (struct tda8083_state* state, u8 reg)
95 tda8083_readregs (state, reg, &val, 1);
100 static int tda8083_set_inversion(struct tda8083_state *state,
101 enum fe_spectral_inversion inversion)
103 /* XXX FIXME: implement other modes than FEC_AUTO */
104 if (inversion == INVERSION_AUTO)
110 static int tda8083_set_fec(struct tda8083_state *state, enum fe_code_rate fec)
113 return tda8083_writereg (state, 0x07, 0xff);
115 if (fec >= FEC_1_2 && fec <= FEC_8_9)
116 return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec));
121 static enum fe_code_rate tda8083_get_fec(struct tda8083_state *state)
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
129 index = tda8083_readreg(state, 0x0e) & 0x07;
131 return fec_tab [index];
134 static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate)
140 if (srate > 32000000)
146 if (srate < 24000000)
148 if (srate < 16000000)
154 tmp = (tmp % srate) << 8;
155 ratio = (ratio << 8) + tmp / srate;
157 tmp = (tmp % srate) << 8;
158 ratio = (ratio << 8) + tmp / srate;
160 dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio);
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);
167 tda8083_writereg (state, 0x00, 0x3c);
168 tda8083_writereg (state, 0x00, 0x04);
173 static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout)
175 unsigned long start = jiffies;
177 while (jiffies - start < timeout &&
178 !(tda8083_readreg(state, 0x02) & 0x80))
184 static int tda8083_set_tone(struct tda8083_state *state,
185 enum fe_sec_tone_mode tone)
187 tda8083_writereg (state, 0x26, 0xf1);
191 return tda8083_writereg (state, 0x29, 0x00);
193 return tda8083_writereg (state, 0x29, 0x80);
199 static int tda8083_set_voltage(struct tda8083_state *state,
200 enum fe_sec_voltage voltage)
204 return tda8083_writereg (state, 0x20, 0x00);
206 return tda8083_writereg (state, 0x20, 0x11);
212 static int tda8083_send_diseqc_burst(struct tda8083_state *state,
213 enum fe_sec_mini_cmd burst)
217 tda8083_writereg (state, 0x29, (5 << 2)); /* send burst A */
220 tda8083_writereg (state, 0x29, (7 << 2)); /* send B */
226 tda8083_wait_diseqc_fifo (state, 100);
231 static int tda8083_send_diseqc_msg(struct dvb_frontend *fe,
232 struct dvb_diseqc_master_cmd *m)
234 struct tda8083_state* state = fe->demodulator_priv;
237 tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */
239 for (i=0; i<m->msg_len; i++)
240 tda8083_writereg (state, 0x23 + i, m->msg[i]);
242 tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */
244 tda8083_wait_diseqc_fifo (state, 100);
249 static int tda8083_read_status(struct dvb_frontend *fe,
250 enum fe_status *status)
252 struct tda8083_state* state = fe->demodulator_priv;
254 u8 signal = ~tda8083_readreg (state, 0x01);
255 u8 sync = tda8083_readreg (state, 0x02);
260 *status |= FE_HAS_SIGNAL;
263 *status |= FE_HAS_CARRIER;
266 *status |= FE_HAS_VITERBI;
269 *status |= FE_HAS_SYNC;
271 if (sync & 0x20) /* frontend can not lock */
272 *status |= FE_TIMEDOUT;
274 if ((sync & 0x1f) == 0x1f)
275 *status |= FE_HAS_LOCK;
280 static int tda8083_read_ber(struct dvb_frontend* fe, u32* ber)
282 struct tda8083_state* state = fe->demodulator_priv;
286 if ((ret = tda8083_readregs(state, 0x0b, buf, sizeof(buf))))
289 *ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2];
294 static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength)
296 struct tda8083_state* state = fe->demodulator_priv;
298 u8 signal = ~tda8083_readreg (state, 0x01);
299 *strength = (signal << 8) | signal;
304 static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr)
306 struct tda8083_state* state = fe->demodulator_priv;
308 u8 _snr = tda8083_readreg (state, 0x08);
309 *snr = (_snr << 8) | _snr;
314 static int tda8083_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
316 struct tda8083_state* state = fe->demodulator_priv;
318 *ucblocks = tda8083_readreg(state, 0x0f);
319 if (*ucblocks == 0xff)
320 *ucblocks = 0xffffffff;
325 static int tda8083_set_frontend(struct dvb_frontend *fe)
327 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
328 struct tda8083_state* state = fe->demodulator_priv;
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);
335 tda8083_set_inversion (state, p->inversion);
336 tda8083_set_fec(state, p->fec_inner);
337 tda8083_set_symbolrate(state, p->symbol_rate);
339 tda8083_writereg (state, 0x00, 0x3c);
340 tda8083_writereg (state, 0x00, 0x04);
345 static int tda8083_get_frontend(struct dvb_frontend *fe,
346 struct dtv_frontend_properties *p)
348 struct tda8083_state* state = fe->demodulator_priv;
350 /* FIXME: get symbolrate & frequency offset...*/
351 /*p->frequency = ???;*/
352 p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ?
353 INVERSION_ON : INVERSION_OFF;
354 p->fec_inner = tda8083_get_fec(state);
355 /*p->symbol_rate = tda8083_get_symbolrate (state);*/
360 static int tda8083_sleep(struct dvb_frontend* fe)
362 struct tda8083_state* state = fe->demodulator_priv;
364 tda8083_writereg (state, 0x00, 0x02);
368 static int tda8083_init(struct dvb_frontend* fe)
370 struct tda8083_state* state = fe->demodulator_priv;
374 tda8083_writereg (state, i, tda8083_init_tab[i]);
376 tda8083_writereg (state, 0x00, 0x3c);
377 tda8083_writereg (state, 0x00, 0x04);
382 static int tda8083_diseqc_send_burst(struct dvb_frontend *fe,
383 enum fe_sec_mini_cmd burst)
385 struct tda8083_state* state = fe->demodulator_priv;
387 tda8083_send_diseqc_burst (state, burst);
388 tda8083_writereg (state, 0x00, 0x3c);
389 tda8083_writereg (state, 0x00, 0x04);
394 static int tda8083_diseqc_set_tone(struct dvb_frontend *fe,
395 enum fe_sec_tone_mode tone)
397 struct tda8083_state* state = fe->demodulator_priv;
399 tda8083_set_tone (state, tone);
400 tda8083_writereg (state, 0x00, 0x3c);
401 tda8083_writereg (state, 0x00, 0x04);
406 static int tda8083_diseqc_set_voltage(struct dvb_frontend *fe,
407 enum fe_sec_voltage voltage)
409 struct tda8083_state* state = fe->demodulator_priv;
411 tda8083_set_voltage (state, voltage);
412 tda8083_writereg (state, 0x00, 0x3c);
413 tda8083_writereg (state, 0x00, 0x04);
418 static void tda8083_release(struct dvb_frontend* fe)
420 struct tda8083_state* state = fe->demodulator_priv;
424 static const struct dvb_frontend_ops tda8083_ops;
426 struct dvb_frontend* tda8083_attach(const struct tda8083_config* config,
427 struct i2c_adapter* i2c)
429 struct tda8083_state* state = NULL;
431 /* allocate memory for the internal state */
432 state = kzalloc(sizeof(struct tda8083_state), GFP_KERNEL);
433 if (state == NULL) goto error;
435 /* setup the state */
436 state->config = config;
439 /* check if the demod is there */
440 if ((tda8083_readreg(state, 0x00)) != 0x05) goto error;
442 /* create dvb_frontend */
443 memcpy(&state->frontend.ops, &tda8083_ops, sizeof(struct dvb_frontend_ops));
444 state->frontend.demodulator_priv = state;
445 return &state->frontend;
452 static const struct dvb_frontend_ops tda8083_ops = {
453 .delsys = { SYS_DVBS },
455 .name = "Philips TDA8083 DVB-S",
456 .frequency_min = 920000, /* TDA8060 */
457 .frequency_max = 2200000, /* TDA8060 */
458 .frequency_stepsize = 125, /* kHz for QPSK frontends */
459 /* .frequency_tolerance = ???,*/
460 .symbol_rate_min = 12000000,
461 .symbol_rate_max = 30000000,
462 /* .symbol_rate_tolerance = ???,*/
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
470 .release = tda8083_release,
472 .init = tda8083_init,
473 .sleep = tda8083_sleep,
475 .set_frontend = tda8083_set_frontend,
476 .get_frontend = tda8083_get_frontend,
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,
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,
490 module_param(debug, int, 0644);
491 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
493 MODULE_DESCRIPTION("Philips TDA8083 DVB-S Demodulator");
494 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler");
495 MODULE_LICENSE("GPL");
497 EXPORT_SYMBOL(tda8083_attach);