forked from Minki/linux
8906939252
These sources do not need to #include "dvb-pll.h" Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
536 lines
14 KiB
C
536 lines
14 KiB
C
/*
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Conexant 22702 DVB OFDM demodulator driver
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based on:
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Alps TDMB7 DVB OFDM demodulator driver
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Copyright (C) 2001-2002 Convergence Integrated Media GmbH
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Holger Waechtler <holger@convergence.de>
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Copyright (C) 2004 Steven Toth <stoth@hauppauge.com>
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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/kernel.h>
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#include <linux/init.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/delay.h>
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#include "dvb_frontend.h"
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#include "cx22702.h"
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struct cx22702_state {
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struct i2c_adapter* i2c;
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/* configuration settings */
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const struct cx22702_config* config;
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struct dvb_frontend frontend;
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/* previous uncorrected block counter */
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u8 prevUCBlocks;
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};
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static int debug = 0;
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#define dprintk if (debug) printk
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/* Register values to initialise the demod */
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static u8 init_tab [] = {
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0x00, 0x00, /* Stop aquisition */
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0x0B, 0x06,
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0x09, 0x01,
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0x0D, 0x41,
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0x16, 0x32,
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0x20, 0x0A,
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0x21, 0x17,
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0x24, 0x3e,
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0x26, 0xff,
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0x27, 0x10,
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0x28, 0x00,
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0x29, 0x00,
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0x2a, 0x10,
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0x2b, 0x00,
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0x2c, 0x10,
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0x2d, 0x00,
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0x48, 0xd4,
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0x49, 0x56,
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0x6b, 0x1e,
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0xc8, 0x02,
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0xf9, 0x00,
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0xfa, 0x00,
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0xfb, 0x00,
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0xfc, 0x00,
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0xfd, 0x00,
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};
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static int cx22702_writereg (struct cx22702_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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printk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n",
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__FUNCTION__, reg, data, ret);
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return (ret != 1) ? -1 : 0;
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}
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static u8 cx22702_readreg (struct cx22702_state* state, u8 reg)
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{
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int ret;
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u8 b0 [] = { reg };
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u8 b1 [] = { 0 };
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struct i2c_msg msg [] = {
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{ .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
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{ .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
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ret = i2c_transfer(state->i2c, msg, 2);
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if (ret != 2)
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printk("%s: readreg error (ret == %i)\n", __FUNCTION__, ret);
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return b1[0];
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}
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static int cx22702_set_inversion (struct cx22702_state *state, int inversion)
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{
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u8 val;
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switch (inversion) {
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case INVERSION_AUTO:
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return -EOPNOTSUPP;
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case INVERSION_ON:
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val = cx22702_readreg (state, 0x0C);
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return cx22702_writereg (state, 0x0C, val | 0x01);
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case INVERSION_OFF:
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val = cx22702_readreg (state, 0x0C);
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return cx22702_writereg (state, 0x0C, val & 0xfe);
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default:
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return -EINVAL;
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}
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}
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/* Retrieve the demod settings */
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static int cx22702_get_tps (struct cx22702_state *state, struct dvb_ofdm_parameters *p)
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{
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u8 val;
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/* Make sure the TPS regs are valid */
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if (!(cx22702_readreg(state, 0x0A) & 0x20))
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return -EAGAIN;
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val = cx22702_readreg (state, 0x01);
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switch( (val&0x18)>>3) {
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case 0: p->constellation = QPSK; break;
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case 1: p->constellation = QAM_16; break;
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case 2: p->constellation = QAM_64; break;
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}
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switch( val&0x07 ) {
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case 0: p->hierarchy_information = HIERARCHY_NONE; break;
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case 1: p->hierarchy_information = HIERARCHY_1; break;
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case 2: p->hierarchy_information = HIERARCHY_2; break;
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case 3: p->hierarchy_information = HIERARCHY_4; break;
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}
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val = cx22702_readreg (state, 0x02);
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switch( (val&0x38)>>3 ) {
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case 0: p->code_rate_HP = FEC_1_2; break;
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case 1: p->code_rate_HP = FEC_2_3; break;
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case 2: p->code_rate_HP = FEC_3_4; break;
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case 3: p->code_rate_HP = FEC_5_6; break;
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case 4: p->code_rate_HP = FEC_7_8; break;
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}
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switch( val&0x07 ) {
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case 0: p->code_rate_LP = FEC_1_2; break;
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case 1: p->code_rate_LP = FEC_2_3; break;
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case 2: p->code_rate_LP = FEC_3_4; break;
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case 3: p->code_rate_LP = FEC_5_6; break;
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case 4: p->code_rate_LP = FEC_7_8; break;
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}
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val = cx22702_readreg (state, 0x03);
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switch( (val&0x0c)>>2 ) {
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case 0: p->guard_interval = GUARD_INTERVAL_1_32; break;
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case 1: p->guard_interval = GUARD_INTERVAL_1_16; break;
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case 2: p->guard_interval = GUARD_INTERVAL_1_8; break;
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case 3: p->guard_interval = GUARD_INTERVAL_1_4; break;
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}
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switch( val&0x03 ) {
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case 0: p->transmission_mode = TRANSMISSION_MODE_2K; break;
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case 1: p->transmission_mode = TRANSMISSION_MODE_8K; break;
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}
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return 0;
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}
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static int cx22702_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
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{
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struct cx22702_state* state = fe->demodulator_priv;
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dprintk ("%s(%d)\n", __FUNCTION__, enable);
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if (enable)
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return cx22702_writereg (state, 0x0D, cx22702_readreg(state, 0x0D) & 0xfe);
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else
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return cx22702_writereg (state, 0x0D, cx22702_readreg(state, 0x0D) | 1);
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}
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/* Talk to the demod, set the FEC, GUARD, QAM settings etc */
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static int cx22702_set_tps (struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
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{
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u8 val;
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struct cx22702_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, p);
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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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/* set inversion */
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cx22702_set_inversion (state, p->inversion);
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/* set bandwidth */
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switch(p->u.ofdm.bandwidth) {
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case BANDWIDTH_6_MHZ:
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cx22702_writereg(state, 0x0C, (cx22702_readreg(state, 0x0C) & 0xcf) | 0x20 );
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break;
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case BANDWIDTH_7_MHZ:
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cx22702_writereg(state, 0x0C, (cx22702_readreg(state, 0x0C) & 0xcf) | 0x10 );
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break;
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case BANDWIDTH_8_MHZ:
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cx22702_writereg(state, 0x0C, cx22702_readreg(state, 0x0C) &0xcf );
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break;
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default:
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dprintk ("%s: invalid bandwidth\n",__FUNCTION__);
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return -EINVAL;
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}
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p->u.ofdm.code_rate_LP = FEC_AUTO; //temp hack as manual not working
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/* use auto configuration? */
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if((p->u.ofdm.hierarchy_information==HIERARCHY_AUTO) ||
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(p->u.ofdm.constellation==QAM_AUTO) ||
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(p->u.ofdm.code_rate_HP==FEC_AUTO) ||
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(p->u.ofdm.code_rate_LP==FEC_AUTO) ||
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(p->u.ofdm.guard_interval==GUARD_INTERVAL_AUTO) ||
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(p->u.ofdm.transmission_mode==TRANSMISSION_MODE_AUTO) ) {
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/* TPS Source - use hardware driven values */
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cx22702_writereg(state, 0x06, 0x10);
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cx22702_writereg(state, 0x07, 0x9);
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cx22702_writereg(state, 0x08, 0xC1);
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cx22702_writereg(state, 0x0B, cx22702_readreg(state, 0x0B) & 0xfc );
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cx22702_writereg(state, 0x0C, (cx22702_readreg(state, 0x0C) & 0xBF) | 0x40 );
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cx22702_writereg(state, 0x00, 0x01); /* Begin aquisition */
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dprintk("%s: Autodetecting\n",__FUNCTION__);
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return 0;
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}
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/* manually programmed values */
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val=0;
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switch(p->u.ofdm.constellation) {
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case QPSK: val = (val&0xe7); break;
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case QAM_16: val = (val&0xe7)|0x08; break;
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case QAM_64: val = (val&0xe7)|0x10; break;
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default:
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dprintk ("%s: invalid constellation\n",__FUNCTION__);
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return -EINVAL;
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}
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switch(p->u.ofdm.hierarchy_information) {
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case HIERARCHY_NONE: val = (val&0xf8); break;
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case HIERARCHY_1: val = (val&0xf8)|1; break;
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case HIERARCHY_2: val = (val&0xf8)|2; break;
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case HIERARCHY_4: val = (val&0xf8)|3; break;
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default:
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dprintk ("%s: invalid hierarchy\n",__FUNCTION__);
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return -EINVAL;
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}
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cx22702_writereg (state, 0x06, val);
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val=0;
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switch(p->u.ofdm.code_rate_HP) {
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case FEC_NONE:
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case FEC_1_2: val = (val&0xc7); break;
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case FEC_2_3: val = (val&0xc7)|0x08; break;
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case FEC_3_4: val = (val&0xc7)|0x10; break;
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case FEC_5_6: val = (val&0xc7)|0x18; break;
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case FEC_7_8: val = (val&0xc7)|0x20; break;
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default:
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dprintk ("%s: invalid code_rate_HP\n",__FUNCTION__);
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return -EINVAL;
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}
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switch(p->u.ofdm.code_rate_LP) {
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case FEC_NONE:
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case FEC_1_2: val = (val&0xf8); break;
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case FEC_2_3: val = (val&0xf8)|1; break;
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case FEC_3_4: val = (val&0xf8)|2; break;
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case FEC_5_6: val = (val&0xf8)|3; break;
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case FEC_7_8: val = (val&0xf8)|4; break;
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default:
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dprintk ("%s: invalid code_rate_LP\n",__FUNCTION__);
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return -EINVAL;
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}
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cx22702_writereg (state, 0x07, val);
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val=0;
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switch(p->u.ofdm.guard_interval) {
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case GUARD_INTERVAL_1_32: val = (val&0xf3); break;
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case GUARD_INTERVAL_1_16: val = (val&0xf3)|0x04; break;
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case GUARD_INTERVAL_1_8: val = (val&0xf3)|0x08; break;
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case GUARD_INTERVAL_1_4: val = (val&0xf3)|0x0c; break;
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default:
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dprintk ("%s: invalid guard_interval\n",__FUNCTION__);
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return -EINVAL;
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}
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switch(p->u.ofdm.transmission_mode) {
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case TRANSMISSION_MODE_2K: val = (val&0xfc); break;
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case TRANSMISSION_MODE_8K: val = (val&0xfc)|1; break;
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default:
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dprintk ("%s: invalid transmission_mode\n",__FUNCTION__);
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return -EINVAL;
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}
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cx22702_writereg(state, 0x08, val);
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cx22702_writereg(state, 0x0B, (cx22702_readreg(state, 0x0B) & 0xfc) | 0x02 );
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cx22702_writereg(state, 0x0C, (cx22702_readreg(state, 0x0C) & 0xBF) | 0x40 );
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/* Begin channel aquisition */
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cx22702_writereg(state, 0x00, 0x01);
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return 0;
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}
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/* Reset the demod hardware and reset all of the configuration registers
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to a default state. */
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static int cx22702_init (struct dvb_frontend* fe)
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{
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int i;
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struct cx22702_state* state = fe->demodulator_priv;
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cx22702_writereg (state, 0x00, 0x02);
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msleep(10);
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for (i=0; i<sizeof(init_tab); i+=2)
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cx22702_writereg (state, init_tab[i], init_tab[i+1]);
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cx22702_writereg (state, 0xf8, (state->config->output_mode << 1) & 0x02);
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cx22702_i2c_gate_ctrl(fe, 0);
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return 0;
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}
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static int cx22702_read_status(struct dvb_frontend* fe, fe_status_t* status)
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{
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struct cx22702_state* state = fe->demodulator_priv;
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u8 reg0A;
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u8 reg23;
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*status = 0;
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reg0A = cx22702_readreg (state, 0x0A);
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reg23 = cx22702_readreg (state, 0x23);
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dprintk ("%s: status demod=0x%02x agc=0x%02x\n"
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,__FUNCTION__,reg0A,reg23);
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if(reg0A & 0x10) {
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*status |= FE_HAS_LOCK;
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*status |= FE_HAS_VITERBI;
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*status |= FE_HAS_SYNC;
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}
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if(reg0A & 0x20)
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*status |= FE_HAS_CARRIER;
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if(reg23 < 0xf0)
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*status |= FE_HAS_SIGNAL;
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return 0;
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}
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static int cx22702_read_ber(struct dvb_frontend* fe, u32* ber)
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{
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struct cx22702_state* state = fe->demodulator_priv;
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if(cx22702_readreg (state, 0xE4) & 0x02) {
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/* Realtime statistics */
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*ber = (cx22702_readreg (state, 0xDE) & 0x7F) << 7
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| (cx22702_readreg (state, 0xDF)&0x7F);
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} else {
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/* Averagtine statistics */
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*ber = (cx22702_readreg (state, 0xDE) & 0x7F) << 7
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| cx22702_readreg (state, 0xDF);
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}
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return 0;
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}
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static int cx22702_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
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{
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struct cx22702_state* state = fe->demodulator_priv;
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u16 rs_ber = 0;
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rs_ber = cx22702_readreg (state, 0x23);
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*signal_strength = (rs_ber << 8) | rs_ber;
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return 0;
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}
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static int cx22702_read_snr(struct dvb_frontend* fe, u16* snr)
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{
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struct cx22702_state* state = fe->demodulator_priv;
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u16 rs_ber=0;
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if(cx22702_readreg (state, 0xE4) & 0x02) {
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/* Realtime statistics */
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rs_ber = (cx22702_readreg (state, 0xDE) & 0x7F) << 7
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| (cx22702_readreg (state, 0xDF)& 0x7F);
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} else {
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/* Averagine statistics */
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rs_ber = (cx22702_readreg (state, 0xDE) & 0x7F) << 8
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| cx22702_readreg (state, 0xDF);
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}
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*snr = ~rs_ber;
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return 0;
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}
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static int cx22702_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
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{
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struct cx22702_state* state = fe->demodulator_priv;
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u8 _ucblocks;
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/* RS Uncorrectable Packet Count then reset */
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_ucblocks = cx22702_readreg (state, 0xE3);
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if (state->prevUCBlocks < _ucblocks)
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*ucblocks = (_ucblocks - state->prevUCBlocks);
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else
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*ucblocks = state->prevUCBlocks - _ucblocks;
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state->prevUCBlocks = _ucblocks;
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return 0;
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}
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static int cx22702_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
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{
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struct cx22702_state* state = fe->demodulator_priv;
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u8 reg0C = cx22702_readreg (state, 0x0C);
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p->inversion = reg0C & 0x1 ? INVERSION_ON : INVERSION_OFF;
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return cx22702_get_tps (state, &p->u.ofdm);
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}
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static int cx22702_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
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{
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tune->min_delay_ms = 1000;
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return 0;
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}
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static void cx22702_release(struct dvb_frontend* fe)
|
|
{
|
|
struct cx22702_state* state = fe->demodulator_priv;
|
|
kfree(state);
|
|
}
|
|
|
|
static struct dvb_frontend_ops cx22702_ops;
|
|
|
|
struct dvb_frontend* cx22702_attach(const struct cx22702_config* config,
|
|
struct i2c_adapter* i2c)
|
|
{
|
|
struct cx22702_state* state = NULL;
|
|
|
|
/* allocate memory for the internal state */
|
|
state = kmalloc(sizeof(struct cx22702_state), GFP_KERNEL);
|
|
if (state == NULL)
|
|
goto error;
|
|
|
|
/* setup the state */
|
|
state->config = config;
|
|
state->i2c = i2c;
|
|
state->prevUCBlocks = 0;
|
|
|
|
/* check if the demod is there */
|
|
if (cx22702_readreg(state, 0x1f) != 0x3)
|
|
goto error;
|
|
|
|
/* create dvb_frontend */
|
|
memcpy(&state->frontend.ops, &cx22702_ops, sizeof(struct dvb_frontend_ops));
|
|
state->frontend.demodulator_priv = state;
|
|
return &state->frontend;
|
|
|
|
error:
|
|
kfree(state);
|
|
return NULL;
|
|
}
|
|
|
|
static struct dvb_frontend_ops cx22702_ops = {
|
|
|
|
.info = {
|
|
.name = "Conexant CX22702 DVB-T",
|
|
.type = FE_OFDM,
|
|
.frequency_min = 177000000,
|
|
.frequency_max = 858000000,
|
|
.frequency_stepsize = 166666,
|
|
.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
|
|
FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
|
|
FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
|
|
FE_CAN_HIERARCHY_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
|
|
FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_RECOVER
|
|
},
|
|
|
|
.release = cx22702_release,
|
|
|
|
.init = cx22702_init,
|
|
.i2c_gate_ctrl = cx22702_i2c_gate_ctrl,
|
|
|
|
.set_frontend = cx22702_set_tps,
|
|
.get_frontend = cx22702_get_frontend,
|
|
.get_tune_settings = cx22702_get_tune_settings,
|
|
|
|
.read_status = cx22702_read_status,
|
|
.read_ber = cx22702_read_ber,
|
|
.read_signal_strength = cx22702_read_signal_strength,
|
|
.read_snr = cx22702_read_snr,
|
|
.read_ucblocks = cx22702_read_ucblocks,
|
|
};
|
|
|
|
module_param(debug, int, 0644);
|
|
MODULE_PARM_DESC(debug, "Enable verbose debug messages");
|
|
|
|
MODULE_DESCRIPTION("Conexant CX22702 DVB-T Demodulator driver");
|
|
MODULE_AUTHOR("Steven Toth");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
EXPORT_SYMBOL(cx22702_attach);
|