498 lines
12 KiB
C
498 lines
12 KiB
C
/*
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Driver for Philips TDA8083 based QPSK Demodulator
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Copyright (C) 2001 Convergence Integrated Media GmbH
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written by Ralph Metzler <ralph@convergence.de>
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adoption to the new DVB frontend API and diagnostic ioctl's
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by Holger Waechtler <holger@convergence.de>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include "dvb_frontend.h"
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#include "tda8083.h"
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struct tda8083_state {
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struct i2c_adapter* i2c;
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/* configuration settings */
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const struct tda8083_config* config;
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struct dvb_frontend frontend;
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};
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static int debug;
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#define dprintk(args...) \
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do { \
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if (debug) printk(KERN_DEBUG "tda8083: " args); \
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} while (0)
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static u8 tda8083_init_tab [] = {
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0x04, 0x00, 0x4a, 0x79, 0x04, 0x00, 0xff, 0xea,
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0x48, 0x42, 0x79, 0x60, 0x70, 0x52, 0x9a, 0x10,
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0x0e, 0x10, 0xf2, 0xa7, 0x93, 0x0b, 0x05, 0xc8,
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0x9d, 0x00, 0x42, 0x80, 0x00, 0x60, 0x40, 0x00,
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0x00, 0x75, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00
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};
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static int tda8083_writereg (struct tda8083_state* state, u8 reg, u8 data)
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{
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int ret;
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u8 buf [] = { reg, data };
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struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
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ret = i2c_transfer(state->i2c, &msg, 1);
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if (ret != 1)
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dprintk ("%s: writereg error (reg %02x, ret == %i)\n",
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__func__, reg, ret);
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return (ret != 1) ? -1 : 0;
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}
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static int tda8083_readregs (struct tda8083_state* state, u8 reg1, u8 *b, u8 len)
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{
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int ret;
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struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = ®1, .len = 1 },
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{ .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
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ret = i2c_transfer(state->i2c, msg, 2);
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if (ret != 2)
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dprintk ("%s: readreg error (reg %02x, ret == %i)\n",
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__func__, reg1, ret);
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return ret == 2 ? 0 : -1;
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}
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static inline u8 tda8083_readreg (struct tda8083_state* state, u8 reg)
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{
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u8 val;
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tda8083_readregs (state, reg, &val, 1);
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return val;
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}
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static int tda8083_set_inversion(struct tda8083_state *state,
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enum fe_spectral_inversion inversion)
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{
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/* XXX FIXME: implement other modes than FEC_AUTO */
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if (inversion == INVERSION_AUTO)
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return 0;
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return -EINVAL;
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}
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static int tda8083_set_fec(struct tda8083_state *state, enum fe_code_rate fec)
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{
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if (fec == FEC_AUTO)
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return tda8083_writereg (state, 0x07, 0xff);
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if (fec >= FEC_1_2 && fec <= FEC_8_9)
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return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec));
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return -EINVAL;
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}
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static enum fe_code_rate tda8083_get_fec(struct tda8083_state *state)
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{
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u8 index;
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static enum fe_code_rate fec_tab[] = {
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FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4,
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FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8
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};
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index = tda8083_readreg(state, 0x0e) & 0x07;
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return fec_tab [index];
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}
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static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate)
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{
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u32 ratio;
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u32 tmp;
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u8 filter;
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if (srate > 32000000)
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srate = 32000000;
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if (srate < 500000)
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srate = 500000;
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filter = 0;
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if (srate < 24000000)
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filter = 2;
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if (srate < 16000000)
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filter = 3;
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tmp = 31250 << 16;
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ratio = tmp / srate;
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tmp = (tmp % srate) << 8;
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ratio = (ratio << 8) + tmp / srate;
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tmp = (tmp % srate) << 8;
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ratio = (ratio << 8) + tmp / srate;
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dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio);
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tda8083_writereg (state, 0x05, filter);
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tda8083_writereg (state, 0x02, (ratio >> 16) & 0xff);
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tda8083_writereg (state, 0x03, (ratio >> 8) & 0xff);
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tda8083_writereg (state, 0x04, (ratio ) & 0xff);
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tda8083_writereg (state, 0x00, 0x3c);
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tda8083_writereg (state, 0x00, 0x04);
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return 1;
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}
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static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout)
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{
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unsigned long start = jiffies;
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while (jiffies - start < timeout &&
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!(tda8083_readreg(state, 0x02) & 0x80))
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{
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msleep(50);
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}
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}
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static int tda8083_set_tone(struct tda8083_state *state,
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enum fe_sec_tone_mode tone)
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{
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tda8083_writereg (state, 0x26, 0xf1);
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switch (tone) {
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case SEC_TONE_OFF:
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return tda8083_writereg (state, 0x29, 0x00);
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case SEC_TONE_ON:
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return tda8083_writereg (state, 0x29, 0x80);
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default:
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return -EINVAL;
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}
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}
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static int tda8083_set_voltage(struct tda8083_state *state,
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enum fe_sec_voltage voltage)
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{
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switch (voltage) {
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case SEC_VOLTAGE_13:
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return tda8083_writereg (state, 0x20, 0x00);
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case SEC_VOLTAGE_18:
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return tda8083_writereg (state, 0x20, 0x11);
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default:
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return -EINVAL;
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}
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}
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static int tda8083_send_diseqc_burst(struct tda8083_state *state,
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enum fe_sec_mini_cmd burst)
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{
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switch (burst) {
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case SEC_MINI_A:
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tda8083_writereg (state, 0x29, (5 << 2)); /* send burst A */
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break;
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case SEC_MINI_B:
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tda8083_writereg (state, 0x29, (7 << 2)); /* send B */
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break;
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default:
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return -EINVAL;
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}
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tda8083_wait_diseqc_fifo (state, 100);
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return 0;
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}
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static int tda8083_send_diseqc_msg(struct dvb_frontend *fe,
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struct dvb_diseqc_master_cmd *m)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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int i;
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tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */
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for (i=0; i<m->msg_len; i++)
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tda8083_writereg (state, 0x23 + i, m->msg[i]);
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tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */
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tda8083_wait_diseqc_fifo (state, 100);
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return 0;
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}
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static int tda8083_read_status(struct dvb_frontend *fe,
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enum fe_status *status)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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u8 signal = ~tda8083_readreg (state, 0x01);
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u8 sync = tda8083_readreg (state, 0x02);
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*status = 0;
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if (signal > 10)
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*status |= FE_HAS_SIGNAL;
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if (sync & 0x01)
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*status |= FE_HAS_CARRIER;
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if (sync & 0x02)
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*status |= FE_HAS_VITERBI;
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if (sync & 0x10)
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*status |= FE_HAS_SYNC;
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if (sync & 0x20) /* frontend can not lock */
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*status |= FE_TIMEDOUT;
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if ((sync & 0x1f) == 0x1f)
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*status |= FE_HAS_LOCK;
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return 0;
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}
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static int tda8083_read_ber(struct dvb_frontend* fe, u32* ber)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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int ret;
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u8 buf[3];
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if ((ret = tda8083_readregs(state, 0x0b, buf, sizeof(buf))))
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return ret;
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*ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2];
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return 0;
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}
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static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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u8 signal = ~tda8083_readreg (state, 0x01);
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*strength = (signal << 8) | signal;
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return 0;
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}
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static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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u8 _snr = tda8083_readreg (state, 0x08);
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*snr = (_snr << 8) | _snr;
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return 0;
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}
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static int tda8083_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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*ucblocks = tda8083_readreg(state, 0x0f);
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if (*ucblocks == 0xff)
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*ucblocks = 0xffffffff;
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return 0;
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}
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static int tda8083_set_frontend(struct dvb_frontend *fe)
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{
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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struct tda8083_state* state = fe->demodulator_priv;
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if (fe->ops.tuner_ops.set_params) {
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fe->ops.tuner_ops.set_params(fe);
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if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
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}
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tda8083_set_inversion (state, p->inversion);
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tda8083_set_fec(state, p->fec_inner);
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tda8083_set_symbolrate(state, p->symbol_rate);
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tda8083_writereg (state, 0x00, 0x3c);
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tda8083_writereg (state, 0x00, 0x04);
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return 0;
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}
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static int tda8083_get_frontend(struct dvb_frontend *fe,
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struct dtv_frontend_properties *p)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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/* FIXME: get symbolrate & frequency offset...*/
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/*p->frequency = ???;*/
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p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ?
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INVERSION_ON : INVERSION_OFF;
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p->fec_inner = tda8083_get_fec(state);
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/*p->symbol_rate = tda8083_get_symbolrate (state);*/
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return 0;
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}
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static int tda8083_sleep(struct dvb_frontend* fe)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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tda8083_writereg (state, 0x00, 0x02);
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return 0;
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}
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static int tda8083_init(struct dvb_frontend* fe)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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int i;
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for (i=0; i<44; i++)
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tda8083_writereg (state, i, tda8083_init_tab[i]);
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tda8083_writereg (state, 0x00, 0x3c);
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tda8083_writereg (state, 0x00, 0x04);
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return 0;
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}
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static int tda8083_diseqc_send_burst(struct dvb_frontend *fe,
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enum fe_sec_mini_cmd burst)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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tda8083_send_diseqc_burst (state, burst);
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tda8083_writereg (state, 0x00, 0x3c);
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tda8083_writereg (state, 0x00, 0x04);
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return 0;
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}
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static int tda8083_diseqc_set_tone(struct dvb_frontend *fe,
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enum fe_sec_tone_mode tone)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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tda8083_set_tone (state, tone);
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tda8083_writereg (state, 0x00, 0x3c);
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tda8083_writereg (state, 0x00, 0x04);
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return 0;
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}
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static int tda8083_diseqc_set_voltage(struct dvb_frontend *fe,
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enum fe_sec_voltage voltage)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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tda8083_set_voltage (state, voltage);
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tda8083_writereg (state, 0x00, 0x3c);
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tda8083_writereg (state, 0x00, 0x04);
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return 0;
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}
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static void tda8083_release(struct dvb_frontend* fe)
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{
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struct tda8083_state* state = fe->demodulator_priv;
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kfree(state);
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}
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static const struct dvb_frontend_ops tda8083_ops;
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struct dvb_frontend* tda8083_attach(const struct tda8083_config* config,
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struct i2c_adapter* i2c)
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{
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struct tda8083_state* state = NULL;
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/* allocate memory for the internal state */
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state = kzalloc(sizeof(struct tda8083_state), GFP_KERNEL);
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if (state == NULL) goto error;
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/* setup the state */
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state->config = config;
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state->i2c = i2c;
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/* check if the demod is there */
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if ((tda8083_readreg(state, 0x00)) != 0x05) goto error;
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/* create dvb_frontend */
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memcpy(&state->frontend.ops, &tda8083_ops, sizeof(struct dvb_frontend_ops));
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state->frontend.demodulator_priv = state;
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return &state->frontend;
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error:
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kfree(state);
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return NULL;
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}
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static const struct dvb_frontend_ops tda8083_ops = {
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.delsys = { SYS_DVBS },
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.info = {
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.name = "Philips TDA8083 DVB-S",
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.frequency_min = 920000, /* TDA8060 */
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.frequency_max = 2200000, /* TDA8060 */
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.frequency_stepsize = 125, /* kHz for QPSK frontends */
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/* .frequency_tolerance = ???,*/
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.symbol_rate_min = 12000000,
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.symbol_rate_max = 30000000,
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/* .symbol_rate_tolerance = ???,*/
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.caps = FE_CAN_INVERSION_AUTO |
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FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
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FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
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FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
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FE_CAN_QPSK | FE_CAN_MUTE_TS
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},
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.release = tda8083_release,
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.init = tda8083_init,
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.sleep = tda8083_sleep,
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.set_frontend = tda8083_set_frontend,
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.get_frontend = tda8083_get_frontend,
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.read_status = tda8083_read_status,
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.read_signal_strength = tda8083_read_signal_strength,
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.read_snr = tda8083_read_snr,
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.read_ber = tda8083_read_ber,
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.read_ucblocks = tda8083_read_ucblocks,
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.diseqc_send_master_cmd = tda8083_send_diseqc_msg,
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.diseqc_send_burst = tda8083_diseqc_send_burst,
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.set_tone = tda8083_diseqc_set_tone,
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.set_voltage = tda8083_diseqc_set_voltage,
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};
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
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MODULE_DESCRIPTION("Philips TDA8083 DVB-S Demodulator");
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MODULE_AUTHOR("Ralph Metzler, Holger Waechtler");
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MODULE_LICENSE("GPL");
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EXPORT_SYMBOL(tda8083_attach);
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