404 строки
11 KiB
C
404 строки
11 KiB
C
/*
|
|
* Samsung s5h1432 DVB-T demodulator driver
|
|
*
|
|
* Copyright (C) 2009 Bill Liu <Bill.Liu@Conexant.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
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/delay.h>
|
|
#include "dvb_frontend.h"
|
|
#include "s5h1432.h"
|
|
|
|
struct s5h1432_state {
|
|
|
|
struct i2c_adapter *i2c;
|
|
|
|
/* configuration settings */
|
|
const struct s5h1432_config *config;
|
|
|
|
struct dvb_frontend frontend;
|
|
|
|
fe_modulation_t current_modulation;
|
|
unsigned int first_tune:1;
|
|
|
|
u32 current_frequency;
|
|
int if_freq;
|
|
|
|
u8 inversion;
|
|
};
|
|
|
|
static int debug;
|
|
|
|
#define dprintk(arg...) do { \
|
|
if (debug) \
|
|
printk(arg); \
|
|
} while (0)
|
|
|
|
static int s5h1432_writereg(struct s5h1432_state *state,
|
|
u8 addr, u8 reg, u8 data)
|
|
{
|
|
int ret;
|
|
u8 buf[] = { reg, data };
|
|
|
|
struct i2c_msg msg = {.addr = addr, .flags = 0, .buf = buf, .len = 2 };
|
|
|
|
ret = i2c_transfer(state->i2c, &msg, 1);
|
|
|
|
if (ret != 1)
|
|
printk(KERN_ERR "%s: writereg error 0x%02x 0x%02x 0x%04x, "
|
|
"ret == %i)\n", __func__, addr, reg, data, ret);
|
|
|
|
return (ret != 1) ? -1 : 0;
|
|
}
|
|
|
|
static u8 s5h1432_readreg(struct s5h1432_state *state, u8 addr, u8 reg)
|
|
{
|
|
int ret;
|
|
u8 b0[] = { reg };
|
|
u8 b1[] = { 0 };
|
|
|
|
struct i2c_msg msg[] = {
|
|
{.addr = addr, .flags = 0, .buf = b0, .len = 1},
|
|
{.addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 1}
|
|
};
|
|
|
|
ret = i2c_transfer(state->i2c, msg, 2);
|
|
|
|
if (ret != 2)
|
|
printk(KERN_ERR "%s: readreg error (ret == %i)\n",
|
|
__func__, ret);
|
|
return b1[0];
|
|
}
|
|
|
|
static int s5h1432_sleep(struct dvb_frontend *fe)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int s5h1432_set_channel_bandwidth(struct dvb_frontend *fe,
|
|
u32 bandwidth)
|
|
{
|
|
struct s5h1432_state *state = fe->demodulator_priv;
|
|
|
|
u8 reg = 0;
|
|
|
|
/* Register [0x2E] bit 3:2 : 8MHz = 0; 7MHz = 1; 6MHz = 2 */
|
|
reg = s5h1432_readreg(state, S5H1432_I2C_TOP_ADDR, 0x2E);
|
|
reg &= ~(0x0C);
|
|
switch (bandwidth) {
|
|
case 6:
|
|
reg |= 0x08;
|
|
break;
|
|
case 7:
|
|
reg |= 0x04;
|
|
break;
|
|
case 8:
|
|
reg |= 0x00;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x2E, reg);
|
|
return 1;
|
|
}
|
|
|
|
static int s5h1432_set_IF(struct dvb_frontend *fe, u32 ifFreqHz)
|
|
{
|
|
struct s5h1432_state *state = fe->demodulator_priv;
|
|
|
|
switch (ifFreqHz) {
|
|
case TAIWAN_HI_IF_FREQ_44_MHZ:
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0x55);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0x55);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0x15);
|
|
break;
|
|
case EUROPE_HI_IF_FREQ_36_MHZ:
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0x00);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0x00);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0x40);
|
|
break;
|
|
case IF_FREQ_6_MHZ:
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0x00);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0x00);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0xe0);
|
|
break;
|
|
case IF_FREQ_3point3_MHZ:
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0x66);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0x66);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0xEE);
|
|
break;
|
|
case IF_FREQ_3point5_MHZ:
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0x55);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0x55);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0xED);
|
|
break;
|
|
case IF_FREQ_4_MHZ:
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0xAA);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0xAA);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0xEA);
|
|
break;
|
|
default:
|
|
{
|
|
u32 value = 0;
|
|
value = (u32) (((48000 - (ifFreqHz / 1000)) * 512 *
|
|
(u32) 32768) / (48 * 1000));
|
|
printk(KERN_INFO
|
|
"Default IFFreq %d :reg value = 0x%x\n",
|
|
ifFreqHz, value);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4,
|
|
(u8) value & 0xFF);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5,
|
|
(u8) (value >> 8) & 0xFF);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7,
|
|
(u8) (value >> 16) & 0xFF);
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Talk to the demod, set the FEC, GUARD, QAM settings etc */
|
|
static int s5h1432_set_frontend(struct dvb_frontend *fe)
|
|
{
|
|
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
|
|
u32 dvb_bandwidth = 8;
|
|
struct s5h1432_state *state = fe->demodulator_priv;
|
|
|
|
if (p->frequency == state->current_frequency) {
|
|
/*current_frequency = p->frequency; */
|
|
/*state->current_frequency = p->frequency; */
|
|
} else {
|
|
fe->ops.tuner_ops.set_params(fe);
|
|
msleep(300);
|
|
s5h1432_set_channel_bandwidth(fe, dvb_bandwidth);
|
|
switch (p->bandwidth_hz) {
|
|
case 6000000:
|
|
dvb_bandwidth = 6;
|
|
s5h1432_set_IF(fe, IF_FREQ_4_MHZ);
|
|
break;
|
|
case 7000000:
|
|
dvb_bandwidth = 7;
|
|
s5h1432_set_IF(fe, IF_FREQ_4_MHZ);
|
|
break;
|
|
case 8000000:
|
|
dvb_bandwidth = 8;
|
|
s5h1432_set_IF(fe, IF_FREQ_4_MHZ);
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
/*fe->ops.tuner_ops.set_params(fe); */
|
|
/*Soft Reset chip*/
|
|
msleep(30);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09, 0x1a);
|
|
msleep(30);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09, 0x1b);
|
|
|
|
s5h1432_set_channel_bandwidth(fe, dvb_bandwidth);
|
|
switch (p->bandwidth_hz) {
|
|
case 6000000:
|
|
dvb_bandwidth = 6;
|
|
s5h1432_set_IF(fe, IF_FREQ_4_MHZ);
|
|
break;
|
|
case 7000000:
|
|
dvb_bandwidth = 7;
|
|
s5h1432_set_IF(fe, IF_FREQ_4_MHZ);
|
|
break;
|
|
case 8000000:
|
|
dvb_bandwidth = 8;
|
|
s5h1432_set_IF(fe, IF_FREQ_4_MHZ);
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
/*fe->ops.tuner_ops.set_params(fe); */
|
|
/*Soft Reset chip*/
|
|
msleep(30);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09, 0x1a);
|
|
msleep(30);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09, 0x1b);
|
|
|
|
}
|
|
|
|
state->current_frequency = p->frequency;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s5h1432_init(struct dvb_frontend *fe)
|
|
{
|
|
struct s5h1432_state *state = fe->demodulator_priv;
|
|
|
|
u8 reg = 0;
|
|
state->current_frequency = 0;
|
|
printk(KERN_INFO " s5h1432_init().\n");
|
|
|
|
/*Set VSB mode as default, this also does a soft reset */
|
|
/*Initialize registers */
|
|
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x04, 0xa8);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x05, 0x01);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x07, 0x70);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x19, 0x80);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1b, 0x9D);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1c, 0x30);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1d, 0x20);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1e, 0x1B);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x2e, 0x40);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x42, 0x84);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x50, 0x5a);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x5a, 0xd3);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x68, 0x50);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xb8, 0x3c);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xc4, 0x10);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xcc, 0x9c);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xDA, 0x00);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe1, 0x94);
|
|
/* s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xf4, 0xa1); */
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xf9, 0x00);
|
|
|
|
/*For NXP tuner*/
|
|
|
|
/*Set 3.3MHz as default IF frequency */
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0x66);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0x66);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0xEE);
|
|
/* Set reg 0x1E to get the full dynamic range */
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1e, 0x31);
|
|
|
|
/* Mode setting in demod */
|
|
reg = s5h1432_readreg(state, S5H1432_I2C_TOP_ADDR, 0x42);
|
|
reg |= 0x80;
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x42, reg);
|
|
/* Serial mode */
|
|
|
|
/* Soft Reset chip */
|
|
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09, 0x1a);
|
|
msleep(30);
|
|
s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09, 0x1b);
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s5h1432_read_status(struct dvb_frontend *fe, fe_status_t *status)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int s5h1432_read_signal_strength(struct dvb_frontend *fe,
|
|
u16 *signal_strength)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int s5h1432_read_snr(struct dvb_frontend *fe, u16 *snr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int s5h1432_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
|
|
{
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s5h1432_read_ber(struct dvb_frontend *fe, u32 *ber)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int s5h1432_get_tune_settings(struct dvb_frontend *fe,
|
|
struct dvb_frontend_tune_settings *tune)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void s5h1432_release(struct dvb_frontend *fe)
|
|
{
|
|
struct s5h1432_state *state = fe->demodulator_priv;
|
|
kfree(state);
|
|
}
|
|
|
|
static struct dvb_frontend_ops s5h1432_ops;
|
|
|
|
struct dvb_frontend *s5h1432_attach(const struct s5h1432_config *config,
|
|
struct i2c_adapter *i2c)
|
|
{
|
|
struct s5h1432_state *state = NULL;
|
|
|
|
printk(KERN_INFO " Enter s5h1432_attach(). attach success!\n");
|
|
/* allocate memory for the internal state */
|
|
state = kmalloc(sizeof(struct s5h1432_state), GFP_KERNEL);
|
|
if (!state)
|
|
return NULL;
|
|
|
|
/* setup the state */
|
|
state->config = config;
|
|
state->i2c = i2c;
|
|
state->current_modulation = QAM_16;
|
|
state->inversion = state->config->inversion;
|
|
|
|
/* create dvb_frontend */
|
|
memcpy(&state->frontend.ops, &s5h1432_ops,
|
|
sizeof(struct dvb_frontend_ops));
|
|
|
|
state->frontend.demodulator_priv = state;
|
|
|
|
return &state->frontend;
|
|
}
|
|
EXPORT_SYMBOL(s5h1432_attach);
|
|
|
|
static struct dvb_frontend_ops s5h1432_ops = {
|
|
.delsys = { SYS_DVBT },
|
|
.info = {
|
|
.name = "Samsung s5h1432 DVB-T Frontend",
|
|
.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},
|
|
|
|
.init = s5h1432_init,
|
|
.sleep = s5h1432_sleep,
|
|
.set_frontend = s5h1432_set_frontend,
|
|
.get_tune_settings = s5h1432_get_tune_settings,
|
|
.read_status = s5h1432_read_status,
|
|
.read_ber = s5h1432_read_ber,
|
|
.read_signal_strength = s5h1432_read_signal_strength,
|
|
.read_snr = s5h1432_read_snr,
|
|
.read_ucblocks = s5h1432_read_ucblocks,
|
|
.release = s5h1432_release,
|
|
};
|
|
|
|
module_param(debug, int, 0644);
|
|
MODULE_PARM_DESC(debug, "Enable verbose debug messages");
|
|
|
|
MODULE_DESCRIPTION("Samsung s5h1432 DVB-T Demodulator driver");
|
|
MODULE_AUTHOR("Bill Liu");
|
|
MODULE_LICENSE("GPL");
|