Conexant 22702 DVB OFDM demodulator driver
based on:
- Alps TDMB7 DVB OFDM demodulator driver
+ Alps TDMB7 DVB OFDM demodulator driver
Copyright (C) 2001-2002 Convergence Integrated Media GmbH
Holger Waechtler <holger@convergence.de>
- Copyright (C) 2004 Steven Toth <steve@toth.demon.co.uk>
+ Copyright (C) 2004 Steven Toth <stoth@hauppauge.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <linux/slab.h>
#include <linux/delay.h>
#include "dvb_frontend.h"
+#include "dvb-pll.h"
#include "cx22702.h"
0x49, 0x56,
0x6b, 0x1e,
0xc8, 0x02,
- 0xf8, 0x02,
0xf9, 0x00,
0xfa, 0x00,
0xfb, 0x00,
case 1: p->guard_interval = GUARD_INTERVAL_1_16; break;
case 2: p->guard_interval = GUARD_INTERVAL_1_8; break;
case 3: p->guard_interval = GUARD_INTERVAL_1_4; break;
-}
+ }
switch( val&0x03 ) {
case 0: p->transmission_mode = TRANSMISSION_MODE_2K; break;
case 1: p->transmission_mode = TRANSMISSION_MODE_8K; break;
return 0;
}
-
-
-
-
-
-
-
-
-
-
-
+static int cx22702_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
+{
+ struct cx22702_state* state = fe->demodulator_priv;
+ dprintk ("%s(%d)\n", __FUNCTION__, enable);
+ if (enable)
+ return cx22702_writereg (state, 0x0D, cx22702_readreg(state, 0x0D) & 0xfe);
+ else
+ return cx22702_writereg (state, 0x0D, cx22702_readreg(state, 0x0D) | 1);
+}
/* Talk to the demod, set the FEC, GUARD, QAM settings etc */
static int cx22702_set_tps (struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
u8 val;
- struct cx22702_state* state = (struct cx22702_state*) fe->demodulator_priv;
+ struct cx22702_state* state = fe->demodulator_priv;
/* set PLL */
- cx22702_writereg (state, 0x0D, cx22702_readreg(state,0x0D) &0xfe);
- state->config->pll_set(fe, p);
- cx22702_writereg (state, 0x0D, cx22702_readreg(state,0x0D) | 1);
+ cx22702_i2c_gate_ctrl(fe, 1);
+ if (state->config->pll_set) {
+ state->config->pll_set(fe, p);
+ } else if (state->config->pll_desc) {
+ u8 pllbuf[4];
+ struct i2c_msg msg = { .addr = state->config->pll_address,
+ .buf = pllbuf, .len = 4 };
+ dvb_pll_configure(state->config->pll_desc, pllbuf,
+ p->frequency,
+ p->u.ofdm.bandwidth);
+ i2c_transfer(state->i2c, &msg, 1);
+ } else {
+ BUG();
+ }
+ cx22702_i2c_gate_ctrl(fe, 0);
/* set inversion */
cx22702_set_inversion (state, p->inversion);
cx22702_writereg(state, 0x0B, cx22702_readreg(state, 0x0B) & 0xfc );
cx22702_writereg(state, 0x0C, (cx22702_readreg(state, 0x0C) & 0xBF) | 0x40 );
cx22702_writereg(state, 0x00, 0x01); /* Begin aquisition */
- printk("%s: Autodetecting\n",__FUNCTION__);
+ dprintk("%s: Autodetecting\n",__FUNCTION__);
return 0;
}
- /* manually programmed values */
+ /* manually programmed values */
val=0;
switch(p->u.ofdm.constellation) {
case QPSK: val = (val&0xe7); break;
return 0;
}
-
/* Reset the demod hardware and reset all of the configuration registers
to a default state. */
static int cx22702_init (struct dvb_frontend* fe)
{
int i;
- struct cx22702_state* state = (struct cx22702_state*) fe->demodulator_priv;
+ struct cx22702_state* state = fe->demodulator_priv;
cx22702_writereg (state, 0x00, 0x02);
for (i=0; i<sizeof(init_tab); i+=2)
cx22702_writereg (state, init_tab[i], init_tab[i+1]);
+ cx22702_writereg (state, 0xf8, (state->config->output_mode << 1) & 0x02);
/* init PLL */
- if (state->config->pll_init) {
- cx22702_writereg (state, 0x0D, cx22702_readreg(state,0x0D) &0xfe);
+ if (state->config->pll_init)
state->config->pll_init(fe);
- cx22702_writereg (state, 0x0D, cx22702_readreg(state,0x0D) | 1);
- }
+
+ cx22702_i2c_gate_ctrl(fe, 0);
return 0;
}
static int cx22702_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
- struct cx22702_state* state = (struct cx22702_state*) fe->demodulator_priv;
+ struct cx22702_state* state = fe->demodulator_priv;
u8 reg0A;
u8 reg23;
- *status = 0;
+ *status = 0;
reg0A = cx22702_readreg (state, 0x0A);
reg23 = cx22702_readreg (state, 0x23);
- dprintk ("%s: status demod=0x%02x agc=0x%02x\n"
- ,__FUNCTION__,reg0A,reg23);
+ dprintk ("%s: status demod=0x%02x agc=0x%02x\n"
+ ,__FUNCTION__,reg0A,reg23);
- if(reg0A & 0x10) {
- *status |= FE_HAS_LOCK;
- *status |= FE_HAS_VITERBI;
- *status |= FE_HAS_SYNC;
- }
+ if(reg0A & 0x10) {
+ *status |= FE_HAS_LOCK;
+ *status |= FE_HAS_VITERBI;
+ *status |= FE_HAS_SYNC;
+ }
- if(reg0A & 0x20)
- *status |= FE_HAS_CARRIER;
+ if(reg0A & 0x20)
+ *status |= FE_HAS_CARRIER;
- if(reg23 < 0xf0)
- *status |= FE_HAS_SIGNAL;
+ if(reg23 < 0xf0)
+ *status |= FE_HAS_SIGNAL;
return 0;
- }
+}
static int cx22702_read_ber(struct dvb_frontend* fe, u32* ber)
- {
- struct cx22702_state* state = (struct cx22702_state*) fe->demodulator_priv;
+{
+ struct cx22702_state* state = fe->demodulator_priv;
if(cx22702_readreg (state, 0xE4) & 0x02) {
- /* Realtime statistics */
+ /* Realtime statistics */
*ber = (cx22702_readreg (state, 0xDE) & 0x7F) << 7
| (cx22702_readreg (state, 0xDF)&0x7F);
- } else {
+ } else {
/* Averagtine statistics */
*ber = (cx22702_readreg (state, 0xDE) & 0x7F) << 7
| cx22702_readreg (state, 0xDF);
- }
+ }
return 0;
- }
+}
static int cx22702_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
- {
- struct cx22702_state* state = (struct cx22702_state*) fe->demodulator_priv;
+{
+ struct cx22702_state* state = fe->demodulator_priv;
*signal_strength = cx22702_readreg (state, 0x23);
static int cx22702_read_snr(struct dvb_frontend* fe, u16* snr)
{
- struct cx22702_state* state = (struct cx22702_state*) fe->demodulator_priv;
+ struct cx22702_state* state = fe->demodulator_priv;
u16 rs_ber=0;
if(cx22702_readreg (state, 0xE4) & 0x02) {
static int cx22702_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
- struct cx22702_state* state = (struct cx22702_state*) fe->demodulator_priv;
+ struct cx22702_state* state = fe->demodulator_priv;
u8 _ucblocks;
/* RS Uncorrectable Packet Count then reset */
_ucblocks = cx22702_readreg (state, 0xE3);
- if (state->prevUCBlocks < _ucblocks) *ucblocks = (_ucblocks - state->prevUCBlocks);
- else *ucblocks = state->prevUCBlocks - _ucblocks;
+ if (state->prevUCBlocks < _ucblocks)
+ *ucblocks = (_ucblocks - state->prevUCBlocks);
+ else
+ *ucblocks = state->prevUCBlocks - _ucblocks;
state->prevUCBlocks = _ucblocks;
return 0;
static int cx22702_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
- struct cx22702_state* state = (struct cx22702_state*) fe->demodulator_priv;
+ struct cx22702_state* state = fe->demodulator_priv;
u8 reg0C = cx22702_readreg (state, 0x0C);
return cx22702_get_tps (state, &p->u.ofdm);
}
+static int cx22702_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
+{
+ tune->min_delay_ms = 1000;
+ return 0;
+}
+
static void cx22702_release(struct dvb_frontend* fe)
{
- struct cx22702_state* state = (struct cx22702_state*) fe->demodulator_priv;
- kfree(state);
- }
+ struct cx22702_state* state = fe->demodulator_priv;
+ kfree(state);
+}
static struct dvb_frontend_ops cx22702_ops;
struct cx22702_state* state = NULL;
/* allocate memory for the internal state */
- state = (struct cx22702_state*) kmalloc(sizeof(struct cx22702_state), GFP_KERNEL);
- if (state == NULL) goto error;
+ state = kmalloc(sizeof(struct cx22702_state), GFP_KERNEL);
+ if (state == NULL)
+ goto error;
/* setup the state */
state->config = config;
state->prevUCBlocks = 0;
/* check if the demod is there */
- if (cx22702_readreg(state, 0x1f) != 0x3) goto error;
+ if (cx22702_readreg(state, 0x1f) != 0x3)
+ goto error;
/* create dvb_frontend */
state->frontend.ops = &state->ops;
return &state->frontend;
error:
- if (state) kfree(state);
+ kfree(state);
return NULL;
}
.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,
+ .i2c_gate_ctrl = cx22702_i2c_gate_ctrl,
};
module_param(debug, int, 0644);
git://git.onelab.eu / linux-2.6.git / blobdiff