- 根目录:
- drivers
- staging
- media
- mn88472
- mn88472.c
/*
* Panasonic MN88472 DVB-T/T2/C demodulator driver
*
* Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
*
* 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.
*/
#include "mn88472_priv.h"
static int mn88472_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *s)
{
s->min_delay_ms = 800;
return 0;
}
static int mn88472_set_frontend(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->demodulator_priv;
struct mn88472_dev *dev = i2c_get_clientdata(client);
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret, i;
u32 if_frequency = 0;
u64 tmp;
u8 delivery_system_val, if_val[3], bw_val[7], bw_val2;
dev_dbg(&client->dev,
"delivery_system=%d modulation=%d frequency=%d symbol_rate=%d inversion=%d\n",
c->delivery_system, c->modulation,
c->frequency, c->symbol_rate, c->inversion);
if (!dev->warm) {
ret = -EAGAIN;
goto err;
}
switch (c->delivery_system) {
case SYS_DVBT:
delivery_system_val = 0x02;
break;
case SYS_DVBT2:
delivery_system_val = 0x03;
break;
case SYS_DVBC_ANNEX_A:
delivery_system_val = 0x04;
break;
default:
ret = -EINVAL;
goto err;
}
if (c->bandwidth_hz <= 5000000) {
memcpy(bw_val, "\xe5\x99\x9a\x1b\xa9\x1b\xa9", 7);
bw_val2 = 0x03;
} else if (c->bandwidth_hz <= 6000000) {
/* IF 3570000 Hz, BW 6000000 Hz */
memcpy(bw_val, "\xbf\x55\x55\x15\x6b\x15\x6b", 7);
bw_val2 = 0x02;
} else if (c->bandwidth_hz <= 7000000) {
/* IF 4570000 Hz, BW 7000000 Hz */
memcpy(bw_val, "\xa4\x00\x00\x0f\x2c\x0f\x2c", 7);
bw_val2 = 0x01;
} else if (c->bandwidth_hz <= 8000000) {
/* IF 4570000 Hz, BW 8000000 Hz */
memcpy(bw_val, "\x8f\x80\x00\x08\xee\x08\xee", 7);
bw_val2 = 0x00;
} else {
ret = -EINVAL;
goto err;
}
/* program tuner */
if (fe->ops.tuner_ops.set_params) {
ret = fe->ops.tuner_ops.set_params(fe);
if (ret)
goto err;
}
if (fe->ops.tuner_ops.get_if_frequency) {
ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
if (ret)
goto err;
dev_dbg(&client->dev, "get_if_frequency=%d\n", if_frequency);
}
/* Calculate IF registers ( (1<<24)*IF / Xtal ) */
tmp = div_u64(if_frequency * (u64)(1<<24) + (dev->xtal / 2),
dev->xtal);
if_val[0] = ((tmp >> 16) & 0xff);
if_val[1] = ((tmp >> 8) & 0xff);
if_val[2] = ((tmp >> 0) & 0xff);
ret = regmap_write(dev->regmap[2], 0xfb, 0x13);
ret = regmap_write(dev->regmap[2], 0xef, 0x13);
ret = regmap_write(dev->regmap[2], 0xf9, 0x13);
if (ret)
goto err;
ret = regmap_write(dev->regmap[2], 0x00, 0x66);
if (ret)
goto err;
ret = regmap_write(dev->regmap[2], 0x01, 0x00);
if (ret)
goto err;
ret = regmap_write(dev->regmap[2], 0x02, 0x01);
if (ret)
goto err;
ret = regmap_write(dev->regmap[2], 0x03, delivery_system_val);
if (ret)
goto err;
ret = regmap_write(dev->regmap[2], 0x04, bw_val2);
if (ret)
goto err;
for (i = 0; i < sizeof(if_val); i++) {
ret = regmap_write(dev->regmap[2], 0x10 + i, if_val[i]);
if (ret)
goto err;
}
for (i = 0; i < sizeof(bw_val); i++) {
ret = regmap_write(dev->regmap[2], 0x13 + i, bw_val[i]);
if (ret)
goto err;
}
switch (c->delivery_system) {
case SYS_DVBT:
ret = regmap_write(dev->regmap[0], 0x07, 0x26);
ret = regmap_write(dev->regmap[0], 0xb0, 0x0a);
ret = regmap_write(dev->regmap[0], 0xb4, 0x00);
ret = regmap_write(dev->regmap[0], 0xcd, 0x1f);
ret = regmap_write(dev->regmap[0], 0xd4, 0x0a);
ret = regmap_write(dev->regmap[0], 0xd6, 0x48);
ret = regmap_write(dev->regmap[0], 0x00, 0xba);
ret = regmap_write(dev->regmap[0], 0x01, 0x13);
if (ret)
goto err;
break;
case SYS_DVBT2:
ret = regmap_write(dev->regmap[2], 0x2b, 0x13);
ret = regmap_write(dev->regmap[2], 0x4f, 0x05);
ret = regmap_write(dev->regmap[1], 0xf6, 0x05);
ret = regmap_write(dev->regmap[0], 0xb0, 0x0a);
ret = regmap_write(dev->regmap[0], 0xb4, 0xf6);
ret = regmap_write(dev->regmap[0], 0xcd, 0x01);
ret = regmap_write(dev->regmap[0], 0xd4, 0x09);
ret = regmap_write(dev->regmap[0], 0xd6, 0x46);
ret = regmap_write(dev->regmap[2], 0x30, 0x80);
ret = regmap_write(dev->regmap[2], 0x32, 0x00);
if (ret)
goto err;
break;
case SYS_DVBC_ANNEX_A:
ret = regmap_write(dev->regmap[0], 0xb0, 0x0b);
ret = regmap_write(dev->regmap[0], 0xb4, 0x00);
ret = regmap_write(dev->regmap[0], 0xcd, 0x17);
ret = regmap_write(dev->regmap[0], 0xd4, 0x09);
ret = regmap_write(dev->regmap[0], 0xd6, 0x48);
ret = regmap_write(dev->regmap[1], 0x00, 0xb0);
if (ret)
goto err;
break;
default:
ret = -EINVAL;
goto err;
}
ret = regmap_write(dev->regmap[0], 0x46, 0x00);
ret = regmap_write(dev->regmap[0], 0xae, 0x00);
switch (dev->ts_mode) {
case SERIAL_TS_MODE:
ret = regmap_write(dev->regmap[2], 0x08, 0x1d);
break;
case PARALLEL_TS_MODE:
ret = regmap_write(dev->regmap[2], 0x08, 0x00);
break;
default:
dev_dbg(&client->dev, "ts_mode error: %d\n", dev->ts_mode);
ret = -EINVAL;
goto err;
}
switch (dev->ts_clock) {
case VARIABLE_TS_CLOCK:
ret = regmap_write(dev->regmap[0], 0xd9, 0xe3);
break;
case FIXED_TS_CLOCK:
ret = regmap_write(dev->regmap[0], 0xd9, 0xe1);
break;
default:
dev_dbg(&client->dev, "ts_clock error: %d\n", dev->ts_clock);
ret = -EINVAL;
goto err;
}
/* Reset demod */
ret = regmap_write(dev->regmap[2], 0xf8, 0x9f);
if (ret)
goto err;
dev->delivery_system = c->delivery_system;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int mn88472_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct i2c_client *client = fe->demodulator_priv;
struct mn88472_dev *dev = i2c_get_clientdata(client);
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
unsigned int utmp;
int lock = 0;
*status = 0;
if (!dev->warm) {
ret = -EAGAIN;
goto err;
}
switch (c->delivery_system) {
case SYS_DVBT:
ret = regmap_read(dev->regmap[0], 0x7F, &utmp);
if (ret)
goto err;
if ((utmp & 0xF) >= 0x09)
lock = 1;
break;
case SYS_DVBT2:
ret = regmap_read(dev->regmap[2], 0x92, &utmp);
if (ret)
goto err;
if ((utmp & 0xF) >= 0x07)
*status |= FE_HAS_SIGNAL;
if ((utmp & 0xF) >= 0x0a)
*status |= FE_HAS_CARRIER;
if ((utmp & 0xF) >= 0x0d)
*status |= FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
break;
case SYS_DVBC_ANNEX_A:
ret = regmap_read(dev->regmap[1], 0x84, &utmp);
if (ret)
goto err;
if ((utmp & 0xF) >= 0x08)
lock = 1;
break;
default:
ret = -EINVAL;
goto err;
}
if (lock)
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
FE_HAS_SYNC | FE_HAS_LOCK;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int mn88472_init(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->demodulator_priv;
struct mn88472_dev *dev = i2c_get_clientdata(client);
int ret, len, remaining;
const struct firmware *fw = NULL;
u8 *fw_file = MN88472_FIRMWARE;
unsigned int tmp;
dev_dbg(&client->dev, "\n");
/* set cold state by default */
dev->warm = false;
/* power on */
ret = regmap_write(dev->regmap[2], 0x05, 0x00);
if (ret)
goto err;
ret = regmap_bulk_write(dev->regmap[2], 0x0b, "\x00\x00", 2);
if (ret)
goto err;
/* check if firmware is already running */
ret = regmap_read(dev->regmap[0], 0xf5, &tmp);
if (ret)
goto err;
if (!(tmp & 0x1)) {
dev_info(&client->dev, "firmware already running\n");
dev->warm = true;
return 0;
}
/* request the firmware, this will block and timeout */
ret = request_firmware(&fw, fw_file, &client->dev);
if (ret) {
dev_err(&client->dev, "firmare file '%s' not found\n",
fw_file);
goto err;
}
dev_info(&client->dev, "downloading firmware from file '%s'\n",
fw_file);
ret = regmap_write(dev->regmap[0], 0xf5, 0x03);
if (ret)
goto firmware_release;
for (remaining = fw->size; remaining > 0;
remaining -= (dev->i2c_wr_max - 1)) {
len = remaining;
if (len > (dev->i2c_wr_max - 1))
len = dev->i2c_wr_max - 1;
ret = regmap_bulk_write(dev->regmap[0], 0xf6,
&fw->data[fw->size - remaining], len);
if (ret) {
dev_err(&client->dev,
"firmware download failed=%d\n", ret);
goto firmware_release;
}
}
/* parity check of firmware */
ret = regmap_read(dev->regmap[0], 0xf8, &tmp);
if (ret) {
dev_err(&client->dev,
"parity reg read failed=%d\n", ret);
goto err;
}
if (tmp & 0x10) {
dev_err(&client->dev,
"firmware parity check failed=0x%x\n", tmp);
goto err;
}
dev_err(&client->dev, "firmware parity check succeeded=0x%x\n", tmp);
ret = regmap_write(dev->regmap[0], 0xf5, 0x00);
if (ret)
goto firmware_release;
release_firmware(fw);
fw = NULL;
/* warm state */
dev->warm = true;
return 0;
firmware_release:
release_firmware(fw);
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int mn88472_sleep(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->demodulator_priv;
struct mn88472_dev *dev = i2c_get_clientdata(client);
int ret;
dev_dbg(&client->dev, "\n");
/* power off */
ret = regmap_write(dev->regmap[2], 0x0b, 0x30);
if (ret)
goto err;
ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
if (ret)
goto err;
dev->delivery_system = SYS_UNDEFINED;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static struct dvb_frontend_ops mn88472_ops = {
.delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A},
.info = {
.name = "Panasonic MN88472",
.symbol_rate_min = 1000000,
.symbol_rate_max = 7200000,
.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_32 |
FE_CAN_QAM_64 |
FE_CAN_QAM_128 |
FE_CAN_QAM_256 |
FE_CAN_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_HIERARCHY_AUTO |
FE_CAN_MUTE_TS |
FE_CAN_2G_MODULATION |
FE_CAN_MULTISTREAM
},
.get_tune_settings = mn88472_get_tune_settings,
.init = mn88472_init,
.sleep = mn88472_sleep,
.set_frontend = mn88472_set_frontend,
.read_status = mn88472_read_status,
};
static int mn88472_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct mn88472_config *config = client->dev.platform_data;
struct mn88472_dev *dev;
int ret;
unsigned int utmp;
static const struct regmap_config regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
dev_dbg(&client->dev, "\n");
/* Caller really need to provide pointer for frontend we create. */
if (config->fe == NULL) {
dev_err(&client->dev, "frontend pointer not defined\n");
ret = -EINVAL;
goto err;
}
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
ret = -ENOMEM;
goto err;
}
dev->i2c_wr_max = config->i2c_wr_max;
dev->xtal = config->xtal;
dev->ts_mode = config->ts_mode;
dev->ts_clock = config->ts_clock;
dev->client[0] = client;
dev->regmap[0] = regmap_init_i2c(dev->client[0], ®map_config);
if (IS_ERR(dev->regmap[0])) {
ret = PTR_ERR(dev->regmap[0]);
goto err_kfree;
}
/* check demod answers to I2C */
ret = regmap_read(dev->regmap[0], 0x00, &utmp);
if (ret)
goto err_regmap_0_regmap_exit;
/*
* Chip has three I2C addresses for different register pages. Used
* addresses are 0x18, 0x1a and 0x1c. We register two dummy clients,
* 0x1a and 0x1c, in order to get own I2C client for each register page.
*/
dev->client[1] = i2c_new_dummy(client->adapter, 0x1a);
if (dev->client[1] == NULL) {
ret = -ENODEV;
dev_err(&client->dev, "I2C registration failed\n");
if (ret)
goto err_regmap_0_regmap_exit;
}
dev->regmap[1] = regmap_init_i2c(dev->client[1], ®map_config);
if (IS_ERR(dev->regmap[1])) {
ret = PTR_ERR(dev->regmap[1]);
goto err_client_1_i2c_unregister_device;
}
i2c_set_clientdata(dev->client[1], dev);
dev->client[2] = i2c_new_dummy(client->adapter, 0x1c);
if (dev->client[2] == NULL) {
ret = -ENODEV;
dev_err(&client->dev, "2nd I2C registration failed\n");
if (ret)
goto err_regmap_1_regmap_exit;
}
dev->regmap[2] = regmap_init_i2c(dev->client[2], ®map_config);
if (IS_ERR(dev->regmap[2])) {
ret = PTR_ERR(dev->regmap[2]);
goto err_client_2_i2c_unregister_device;
}
i2c_set_clientdata(dev->client[2], dev);
/* create dvb_frontend */
memcpy(&dev->fe.ops, &mn88472_ops, sizeof(struct dvb_frontend_ops));
dev->fe.demodulator_priv = client;
*config->fe = &dev->fe;
i2c_set_clientdata(client, dev);
dev_info(&client->dev, "Panasonic MN88472 successfully attached\n");
return 0;
err_client_2_i2c_unregister_device:
i2c_unregister_device(dev->client[2]);
err_regmap_1_regmap_exit:
regmap_exit(dev->regmap[1]);
err_client_1_i2c_unregister_device:
i2c_unregister_device(dev->client[1]);
err_regmap_0_regmap_exit:
regmap_exit(dev->regmap[0]);
err_kfree:
kfree(dev);
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int mn88472_remove(struct i2c_client *client)
{
struct mn88472_dev *dev = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
regmap_exit(dev->regmap[2]);
i2c_unregister_device(dev->client[2]);
regmap_exit(dev->regmap[1]);
i2c_unregister_device(dev->client[1]);
regmap_exit(dev->regmap[0]);
kfree(dev);
return 0;
}
static const struct i2c_device_id mn88472_id_table[] = {
{"mn88472", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, mn88472_id_table);
static struct i2c_driver mn88472_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "mn88472",
},
.probe = mn88472_probe,
.remove = mn88472_remove,
.id_table = mn88472_id_table,
};
module_i2c_driver(mn88472_driver);
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Panasonic MN88472 DVB-T/T2/C demodulator driver");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE(MN88472_FIRMWARE);