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/moduleparam.h>
31 #include <linux/string.h>
32 #include <linux/slab.h>
33 #include <linux/jiffies.h>
34 #include "dvb_frontend.h"
38 struct tda8083_state {
39 struct i2c_adapter* i2c;
40 struct dvb_frontend_ops ops;
41 /* configuration settings */
42 const struct tda8083_config* config;
43 struct dvb_frontend frontend;
47 #define dprintk(args...) \
49 if (debug) printk(KERN_DEBUG "tda8083: " args); \
53 static u8 tda8083_init_tab [] = {
54 0x04, 0x00, 0x4a, 0x79, 0x04, 0x00, 0xff, 0xea,
55 0x48, 0x42, 0x79, 0x60, 0x70, 0x52, 0x9a, 0x10,
56 0x0e, 0x10, 0xf2, 0xa7, 0x93, 0x0b, 0x05, 0xc8,
57 0x9d, 0x00, 0x42, 0x80, 0x00, 0x60, 0x40, 0x00,
58 0x00, 0x75, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00,
59 0x00, 0x00, 0x00, 0x00
63 static int tda8083_writereg (struct tda8083_state* state, u8 reg, u8 data)
66 u8 buf [] = { reg, data };
67 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
69 ret = i2c_transfer(state->i2c, &msg, 1);
72 dprintk ("%s: writereg error (reg %02x, ret == %i)\n",
73 __FUNCTION__, reg, ret);
75 return (ret != 1) ? -1 : 0;
78 static int tda8083_readregs (struct tda8083_state* state, u8 reg1, u8 *b, u8 len)
81 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = ®1, .len = 1 },
82 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
84 ret = i2c_transfer(state->i2c, msg, 2);
87 dprintk ("%s: readreg error (reg %02x, ret == %i)\n",
88 __FUNCTION__, reg1, ret);
90 return ret == 2 ? 0 : -1;
93 static inline u8 tda8083_readreg (struct tda8083_state* state, u8 reg)
97 tda8083_readregs (state, reg, &val, 1);
102 static int tda8083_set_inversion (struct tda8083_state* state, fe_spectral_inversion_t inversion)
104 /* XXX FIXME: implement other modes than FEC_AUTO */
105 if (inversion == INVERSION_AUTO)
111 static int tda8083_set_fec (struct tda8083_state* state, fe_code_rate_t fec)
114 return tda8083_writereg (state, 0x07, 0xff);
116 if (fec >= FEC_1_2 && fec <= FEC_8_9)
117 return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec));
122 static fe_code_rate_t tda8083_get_fec (struct tda8083_state* state)
125 static fe_code_rate_t fec_tab [] = { 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 };
128 index = tda8083_readreg(state, 0x0e) & 0x07;
130 return fec_tab [index];
133 static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate)
139 if (srate > 32000000)
145 if (srate < 24000000)
147 if (srate < 16000000)
153 tmp = (tmp % srate) << 8;
154 ratio = (ratio << 8) + tmp / srate;
156 tmp = (tmp % srate) << 8;
157 ratio = (ratio << 8) + tmp / srate;
159 dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio);
161 tda8083_writereg (state, 0x05, filter);
162 tda8083_writereg (state, 0x02, (ratio >> 16) & 0xff);
163 tda8083_writereg (state, 0x03, (ratio >> 8) & 0xff);
164 tda8083_writereg (state, 0x04, (ratio ) & 0xff);
166 tda8083_writereg (state, 0x00, 0x3c);
167 tda8083_writereg (state, 0x00, 0x04);
172 static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout)
174 unsigned long start = jiffies;
176 while (jiffies - start < timeout &&
177 !(tda8083_readreg(state, 0x02) & 0x80))
183 static int tda8083_set_tone (struct tda8083_state* state, fe_sec_tone_mode_t tone)
185 tda8083_writereg (state, 0x26, 0xf1);
189 return tda8083_writereg (state, 0x29, 0x00);
191 return tda8083_writereg (state, 0x29, 0x80);
197 static int tda8083_set_voltage (struct tda8083_state* state, fe_sec_voltage_t voltage)
201 return tda8083_writereg (state, 0x20, 0x00);
203 return tda8083_writereg (state, 0x20, 0x11);
209 static int tda8083_send_diseqc_burst (struct tda8083_state* state, fe_sec_mini_cmd_t burst)
213 tda8083_writereg (state, 0x29, (5 << 2)); /* send burst A */
216 tda8083_writereg (state, 0x29, (7 << 2)); /* send B */
222 tda8083_wait_diseqc_fifo (state, 100);
227 static int tda8083_send_diseqc_msg (struct dvb_frontend* fe,
228 struct dvb_diseqc_master_cmd *m)
230 struct tda8083_state* state = fe->demodulator_priv;
233 tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */
235 for (i=0; i<m->msg_len; i++)
236 tda8083_writereg (state, 0x23 + i, m->msg[i]);
238 tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */
240 tda8083_wait_diseqc_fifo (state, 100);
245 static int tda8083_read_status(struct dvb_frontend* fe, fe_status_t* status)
247 struct tda8083_state* state = fe->demodulator_priv;
249 u8 signal = ~tda8083_readreg (state, 0x01);
250 u8 sync = tda8083_readreg (state, 0x02);
255 *status |= FE_HAS_SIGNAL;
258 *status |= FE_HAS_CARRIER;
261 *status |= FE_HAS_VITERBI;
264 *status |= FE_HAS_SYNC;
266 if ((sync & 0x1f) == 0x1f)
267 *status |= FE_HAS_LOCK;
272 static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength)
274 struct tda8083_state* state = fe->demodulator_priv;
276 u8 signal = ~tda8083_readreg (state, 0x01);
277 *strength = (signal << 8) | signal;
282 static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr)
284 struct tda8083_state* state = fe->demodulator_priv;
286 u8 _snr = tda8083_readreg (state, 0x08);
287 *snr = (_snr << 8) | _snr;
292 static int tda8083_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
294 struct tda8083_state* state = fe->demodulator_priv;
296 state->config->pll_set(fe, p);
297 tda8083_set_inversion (state, p->inversion);
298 tda8083_set_fec (state, p->u.qpsk.fec_inner);
299 tda8083_set_symbolrate (state, p->u.qpsk.symbol_rate);
301 tda8083_writereg (state, 0x00, 0x3c);
302 tda8083_writereg (state, 0x00, 0x04);
307 static int tda8083_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
309 struct tda8083_state* state = fe->demodulator_priv;
311 /* FIXME: get symbolrate & frequency offset...*/
312 /*p->frequency = ???;*/
313 p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ?
314 INVERSION_ON : INVERSION_OFF;
315 p->u.qpsk.fec_inner = tda8083_get_fec (state);
316 /*p->u.qpsk.symbol_rate = tda8083_get_symbolrate (state);*/
321 static int tda8083_sleep(struct dvb_frontend* fe)
323 struct tda8083_state* state = fe->demodulator_priv;
325 tda8083_writereg (state, 0x00, 0x02);
329 static int tda8083_init(struct dvb_frontend* fe)
331 struct tda8083_state* state = fe->demodulator_priv;
335 tda8083_writereg (state, i, tda8083_init_tab[i]);
337 if (state->config->pll_init) state->config->pll_init(fe);
339 tda8083_writereg (state, 0x00, 0x3c);
340 tda8083_writereg (state, 0x00, 0x04);
345 static int tda8083_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
347 struct tda8083_state* state = fe->demodulator_priv;
349 tda8083_send_diseqc_burst (state, burst);
350 tda8083_writereg (state, 0x00, 0x3c);
351 tda8083_writereg (state, 0x00, 0x04);
356 static int tda8083_diseqc_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
358 struct tda8083_state* state = fe->demodulator_priv;
360 tda8083_set_tone (state, tone);
361 tda8083_writereg (state, 0x00, 0x3c);
362 tda8083_writereg (state, 0x00, 0x04);
367 static int tda8083_diseqc_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
369 struct tda8083_state* state = fe->demodulator_priv;
371 tda8083_set_voltage (state, voltage);
372 tda8083_writereg (state, 0x00, 0x3c);
373 tda8083_writereg (state, 0x00, 0x04);
378 static void tda8083_release(struct dvb_frontend* fe)
380 struct tda8083_state* state = fe->demodulator_priv;
384 static struct dvb_frontend_ops tda8083_ops;
386 struct dvb_frontend* tda8083_attach(const struct tda8083_config* config,
387 struct i2c_adapter* i2c)
389 struct tda8083_state* state = NULL;
391 /* allocate memory for the internal state */
392 state = kmalloc(sizeof(struct tda8083_state), GFP_KERNEL);
393 if (state == NULL) goto error;
395 /* setup the state */
396 state->config = config;
398 memcpy(&state->ops, &tda8083_ops, sizeof(struct dvb_frontend_ops));
400 /* check if the demod is there */
401 if ((tda8083_readreg(state, 0x00)) != 0x05) goto error;
403 /* create dvb_frontend */
404 state->frontend.ops = &state->ops;
405 state->frontend.demodulator_priv = state;
406 return &state->frontend;
413 static struct dvb_frontend_ops tda8083_ops = {
416 .name = "Philips TDA8083 DVB-S",
418 .frequency_min = 950000, /* FIXME: guessed! */
419 .frequency_max = 1400000, /* FIXME: guessed! */
420 .frequency_stepsize = 125, /* kHz for QPSK frontends */
421 /* .frequency_tolerance = ???,*/
422 .symbol_rate_min = 1000000, /* FIXME: guessed! */
423 .symbol_rate_max = 45000000, /* FIXME: guessed! */
424 /* .symbol_rate_tolerance = ???,*/
425 .caps = FE_CAN_INVERSION_AUTO |
426 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
427 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
428 FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
429 FE_CAN_QPSK | FE_CAN_MUTE_TS
432 .release = tda8083_release,
434 .init = tda8083_init,
435 .sleep = tda8083_sleep,
437 .set_frontend = tda8083_set_frontend,
438 .get_frontend = tda8083_get_frontend,
440 .read_status = tda8083_read_status,
441 .read_signal_strength = tda8083_read_signal_strength,
442 .read_snr = tda8083_read_snr,
444 .diseqc_send_master_cmd = tda8083_send_diseqc_msg,
445 .diseqc_send_burst = tda8083_diseqc_send_burst,
446 .set_tone = tda8083_diseqc_set_tone,
447 .set_voltage = tda8083_diseqc_set_voltage,
450 module_param(debug, int, 0644);
451 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
453 MODULE_DESCRIPTION("Philips TDA8083 DVB-S Demodulator");
454 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler");
455 MODULE_LICENSE("GPL");
457 EXPORT_SYMBOL(tda8083_attach);