2 Driver for Grundig 29504-491, a Philips TDA8083 based QPSK Frontend
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>
33 #include "dvb_frontend.h"
34 #include "dvb_functions.h"
37 #define dprintk if (debug) printk
40 static struct dvb_frontend_info grundig_29504_491_info = {
41 .name = "Grundig 29504-491, (TDA8083 based)",
43 .frequency_min = 950000, /* FIXME: guessed! */
44 .frequency_max = 1400000, /* FIXME: guessed! */
45 .frequency_stepsize = 125, /* kHz for QPSK frontends */
46 /* .frequency_tolerance = ???,*/
47 .symbol_rate_min = 1000000, /* FIXME: guessed! */
48 .symbol_rate_max = 45000000, /* FIXME: guessed! */
49 /* .symbol_rate_tolerance = ???,*/
51 .caps = FE_CAN_INVERSION_AUTO |
52 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
53 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
54 FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
55 FE_CAN_QPSK | FE_CAN_MUTE_TS
60 static u8 tda8083_init_tab [] = {
61 0x04, 0x00, 0x4a, 0x79, 0x04, 0x00, 0xff, 0xea,
62 0x48, 0x42, 0x79, 0x60, 0x70, 0x52, 0x9a, 0x10,
63 0x0e, 0x10, 0xf2, 0xa7, 0x93, 0x0b, 0x05, 0xc8,
64 0x9d, 0x00, 0x42, 0x80, 0x00, 0x60, 0x40, 0x00,
65 0x00, 0x75, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00,
66 0x00, 0x00, 0x00, 0x00
71 static int tda8083_writereg (struct dvb_i2c_bus *i2c, u8 reg, u8 data)
74 u8 buf [] = { reg, data };
75 struct i2c_msg msg = { .addr = 0x68, .flags = 0, .buf = buf, .len = 2 };
77 ret = i2c->xfer (i2c, &msg, 1);
80 dprintk ("%s: writereg error (reg %02x, ret == %i)\n",
81 __FUNCTION__, reg, ret);
83 return (ret != 1) ? -1 : 0;
87 static int tda8083_readregs (struct dvb_i2c_bus *i2c, u8 reg1, u8 *b, u8 len)
90 struct i2c_msg msg [] = { { .addr = 0x68, .flags = 0, .buf = ®1, .len = 1 },
91 { .addr = 0x68, .flags = I2C_M_RD, .buf = b, .len = len } };
93 ret = i2c->xfer (i2c, msg, 2);
96 dprintk ("%s: readreg error (reg %02x, ret == %i)\n",
97 __FUNCTION__, reg1, ret);
99 return ret == 2 ? 0 : -1;
103 static inline u8 tda8083_readreg (struct dvb_i2c_bus *i2c, u8 reg)
107 tda8083_readregs (i2c, reg, &val, 1);
113 static int tsa5522_write (struct dvb_i2c_bus *i2c, u8 data [4])
116 struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = data, .len = 4 };
118 ret = i2c->xfer (i2c, &msg, 1);
121 dprintk("%s: i/o error (ret == %i)\n", __FUNCTION__, ret);
123 return (ret != 1) ? -1 : 0;
128 * set up the downconverter frequency divisor for a
129 * reference clock comparision frequency of 125 kHz.
131 static int tsa5522_set_tv_freq (struct dvb_i2c_bus *i2c, u32 freq)
133 u32 div = freq / 125;
134 u8 buf [4] = { (div >> 8) & 0x7f, div & 0xff, 0x8e, 0x00 };
136 return tsa5522_write (i2c, buf);
140 static int tda8083_init (struct dvb_i2c_bus *i2c)
144 dprintk("%s: init TDA8083\n", __FILE__);
147 tda8083_writereg (i2c, i, tda8083_init_tab[i]);
153 static int tda8083_set_inversion (struct dvb_i2c_bus *i2c, fe_spectral_inversion_t inversion)
155 /* XXX FIXME: implement other modes than FEC_AUTO */
156 if (inversion == INVERSION_AUTO)
163 static int tda8083_set_fec (struct dvb_i2c_bus *i2c, fe_code_rate_t fec)
166 return tda8083_writereg (i2c, 0x07, 0xff);
168 if (fec >= FEC_1_2 && fec <= FEC_8_9)
169 return tda8083_writereg (i2c, 0x07, 1 << (FEC_8_9 - fec));
175 static fe_code_rate_t tda8083_get_fec (struct dvb_i2c_bus *i2c)
178 static fe_code_rate_t fec_tab [] = { FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4,
179 FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8 };
181 index = tda8083_readreg(i2c, 0x0e) & 0x07;
183 return fec_tab [index];
187 static int tda8083_set_symbolrate (struct dvb_i2c_bus *i2c, u32 srate)
193 if (srate > 32000000)
199 if (srate < 24000000)
201 if (srate < 16000000)
207 tmp = (tmp % srate) << 8;
208 ratio = (ratio << 8) + tmp / srate;
210 tmp = (tmp % srate) << 8;
211 ratio = (ratio << 8) + tmp / srate;
213 dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio);
215 tda8083_writereg (i2c, 0x05, filter);
216 tda8083_writereg (i2c, 0x02, (ratio >> 16) & 0xff);
217 tda8083_writereg (i2c, 0x03, (ratio >> 8) & 0xff);
218 tda8083_writereg (i2c, 0x04, (ratio ) & 0xff);
220 tda8083_writereg (i2c, 0x00, 0x3c);
221 tda8083_writereg (i2c, 0x00, 0x04);
227 static void tda8083_wait_diseqc_fifo (struct dvb_i2c_bus *i2c, int timeout)
229 unsigned long start = jiffies;
231 while (jiffies - start < timeout &&
232 !(tda8083_readreg(i2c, 0x02) & 0x80))
239 static int tda8083_send_diseqc_msg (struct dvb_i2c_bus *i2c,
240 struct dvb_diseqc_master_cmd *m)
244 tda8083_writereg (i2c, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */
246 for (i=0; i<m->msg_len; i++)
247 tda8083_writereg (i2c, 0x23 + i, m->msg[i]);
249 tda8083_writereg (i2c, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */
251 tda8083_wait_diseqc_fifo (i2c, 100);
257 static int tda8083_send_diseqc_burst (struct dvb_i2c_bus *i2c, fe_sec_mini_cmd_t burst)
261 tda8083_writereg (i2c, 0x29, (5 << 2)); /* send burst A */
264 tda8083_writereg (i2c, 0x29, (7 << 2)); /* send B */
270 tda8083_wait_diseqc_fifo (i2c, 100);
276 static int tda8083_set_tone (struct dvb_i2c_bus *i2c, fe_sec_tone_mode_t tone)
278 tda8083_writereg (i2c, 0x26, 0xf1);
282 return tda8083_writereg (i2c, 0x29, 0x00);
284 return tda8083_writereg (i2c, 0x29, 0x80);
291 static int tda8083_set_voltage (struct dvb_i2c_bus *i2c, fe_sec_voltage_t voltage)
295 return tda8083_writereg (i2c, 0x20, 0x00);
297 return tda8083_writereg (i2c, 0x20, 0x11);
304 static int grundig_29504_491_ioctl (struct dvb_frontend *fe, unsigned int cmd,
307 struct dvb_i2c_bus *i2c = fe->i2c;
311 memcpy (arg, &grundig_29504_491_info,
312 sizeof(struct dvb_frontend_info));
317 fe_status_t *status=(fe_status_t *) arg;
318 u8 signal = ~tda8083_readreg (i2c, 0x01);
319 u8 sync = tda8083_readreg (i2c, 0x02);
324 *status |= FE_HAS_SIGNAL;
327 *status |= FE_HAS_CARRIER;
330 *status |= FE_HAS_VITERBI;
333 *status |= FE_HAS_SYNC;
335 if ((sync & 0x1f) == 0x1f)
336 *status |= FE_HAS_LOCK;
342 *((u32*) arg) = 0; /* XXX FIXME: implement me!!! */
345 case FE_READ_SIGNAL_STRENGTH:
347 u8 signal = ~tda8083_readreg (i2c, 0x01);
348 *((u16*) arg) = (signal << 8) | signal;
353 u8 snr = tda8083_readreg (i2c, 0x08);
354 *((u16*) arg) = (snr << 8) | snr;
357 case FE_READ_UNCORRECTED_BLOCKS:
358 *((u32*) arg) = 0; /* XXX FIXME: implement me!!! */
362 case FE_SET_FRONTEND:
364 struct dvb_frontend_parameters *p = arg;
366 tsa5522_set_tv_freq (i2c, p->frequency);
367 tda8083_set_inversion (i2c, p->inversion);
368 tda8083_set_fec (i2c, p->u.qpsk.fec_inner);
369 tda8083_set_symbolrate (i2c, p->u.qpsk.symbol_rate);
371 tda8083_writereg (i2c, 0x00, 0x3c);
372 tda8083_writereg (i2c, 0x00, 0x04);
377 case FE_GET_FRONTEND:
379 struct dvb_frontend_parameters *p = arg;
381 /* FIXME: get symbolrate & frequency offset...*/
382 /*p->frequency = ???;*/
383 p->inversion = (tda8083_readreg (i2c, 0x0e) & 0x80) ?
384 INVERSION_ON : INVERSION_OFF;
385 p->u.qpsk.fec_inner = tda8083_get_fec (i2c);
386 /*p->u.qpsk.symbol_rate = tda8083_get_symbolrate (i2c);*/
391 tda8083_writereg (i2c, 0x00, 0x02);
396 tda8083_writereg (i2c, 0x00, 0x3c);
397 tda8083_writereg (i2c, 0x00, 0x04);
400 case FE_DISEQC_SEND_MASTER_CMD:
401 return tda8083_send_diseqc_msg (i2c, arg);
403 case FE_DISEQC_SEND_BURST:
404 tda8083_send_diseqc_burst (i2c, (fe_sec_mini_cmd_t) arg);
405 tda8083_writereg (i2c, 0x00, 0x3c);
406 tda8083_writereg (i2c, 0x00, 0x04);
411 tda8083_set_tone (i2c, (fe_sec_tone_mode_t) arg);
412 tda8083_writereg (i2c, 0x00, 0x3c);
413 tda8083_writereg (i2c, 0x00, 0x04);
417 tda8083_set_voltage (i2c, (fe_sec_voltage_t) arg);
418 tda8083_writereg (i2c, 0x00, 0x3c);
419 tda8083_writereg (i2c, 0x00, 0x04);
430 static int tda8083_attach (struct dvb_i2c_bus *i2c, void **data)
432 if ((tda8083_readreg (i2c, 0x00)) != 0x05)
435 return dvb_register_frontend (grundig_29504_491_ioctl, i2c, NULL,
436 &grundig_29504_491_info);
440 static void tda8083_detach (struct dvb_i2c_bus *i2c, void *data)
442 dvb_unregister_frontend (grundig_29504_491_ioctl, i2c);
446 static int __init init_tda8083 (void)
448 return dvb_register_i2c_device (THIS_MODULE,
449 tda8083_attach, tda8083_detach);
453 static void __exit exit_tda8083 (void)
455 dvb_unregister_i2c_device (tda8083_attach);
458 module_init(init_tda8083);
459 module_exit(exit_tda8083);
461 MODULE_PARM(debug,"i");
462 MODULE_DESCRIPTION("Grundig 29504-491 DVB frontend driver");
463 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler");
464 MODULE_LICENSE("GPL");