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OpenCloudOS-Kernel/drivers/media/dvb-frontends/mn88473.c

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/*
* Panasonic MN88473 DVB-T/T2/C demodulator driver
*
* Copyright (C) 2014 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 "mn88473_priv.h"
static struct dvb_frontend_ops mn88473_ops;
/* write multiple registers */
static int mn88473_wregs(struct mn88473_dev *dev, u16 reg, const u8 *val, int len)
{
#define MAX_WR_LEN 21
#define MAX_WR_XFER_LEN (MAX_WR_LEN + 1)
int ret;
u8 buf[MAX_WR_XFER_LEN];
struct i2c_msg msg[1] = {
{
.addr = (reg >> 8) & 0xff,
.flags = 0,
.len = 1 + len,
.buf = buf,
}
};
if (WARN_ON(len > MAX_WR_LEN))
return -EINVAL;
buf[0] = (reg >> 0) & 0xff;
memcpy(&buf[1], val, len);
ret = i2c_transfer(dev->client[0]->adapter, msg, 1);
if (ret == 1) {
ret = 0;
} else {
dev_warn(&dev->client[0]->dev,
"i2c wr failed=%d reg=%02x len=%d\n",
ret, reg, len);
ret = -EREMOTEIO;
}
return ret;
}
/* read multiple registers */
static int mn88473_rregs(struct mn88473_dev *dev, u16 reg, u8 *val, int len)
{
#define MAX_RD_LEN 2
#define MAX_RD_XFER_LEN (MAX_RD_LEN)
int ret;
u8 buf[MAX_RD_XFER_LEN];
struct i2c_msg msg[2] = {
{
.addr = (reg >> 8) & 0xff,
.flags = 0,
.len = 1,
.buf = buf,
}, {
.addr = (reg >> 8) & 0xff,
.flags = I2C_M_RD,
.len = len,
.buf = buf,
}
};
if (WARN_ON(len > MAX_RD_LEN))
return -EINVAL;
buf[0] = (reg >> 0) & 0xff;
ret = i2c_transfer(dev->client[0]->adapter, msg, 2);
if (ret == 2) {
memcpy(val, buf, len);
ret = 0;
} else {
dev_warn(&dev->client[0]->dev,
"i2c rd failed=%d reg=%02x len=%d\n",
ret, reg, len);
ret = -EREMOTEIO;
}
return ret;
}
/* write single register */
static int mn88473_wreg(struct mn88473_dev *dev, u16 reg, u8 val)
{
return mn88473_wregs(dev, reg, &val, 1);
}
/* read single register */
static int mn88473_rreg(struct mn88473_dev *dev, u16 reg, u8 *val)
{
return mn88473_rregs(dev, reg, val, 1);
}
static int mn88473_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *s)
{
s->min_delay_ms = 1000;
return 0;
}
static int mn88473_set_frontend(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->demodulator_priv;
struct mn88473_dev *dev = i2c_get_clientdata(client);
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret, i;
u32 if_frequency;
u8 delivery_system_val, if_val[3], bw_val[7];
dev_dbg(&client->dev,
"delivery_system=%u modulation=%u frequency=%u bandwidth_hz=%u symbol_rate=%u inversion=%d stream_id=%d\n",
c->delivery_system, c->modulation,
c->frequency, c->bandwidth_hz, c->symbol_rate,
c->inversion, c->stream_id);
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;
}
switch (c->delivery_system) {
case SYS_DVBT:
case SYS_DVBT2:
if (c->bandwidth_hz <= 6000000) {
/* IF 3570000 Hz, BW 6000000 Hz */
memcpy(if_val, "\x24\x8e\x8a", 3);
memcpy(bw_val, "\xe9\x55\x55\x1c\x29\x1c\x29", 7);
} else if (c->bandwidth_hz <= 7000000) {
/* IF 4570000 Hz, BW 7000000 Hz */
memcpy(if_val, "\x2e\xcb\xfb", 3);
memcpy(bw_val, "\xc8\x00\x00\x17\x0a\x17\x0a", 7);
} else if (c->bandwidth_hz <= 8000000) {
/* IF 4570000 Hz, BW 8000000 Hz */
memcpy(if_val, "\x2e\xcb\xfb", 3);
memcpy(bw_val, "\xaf\x00\x00\x11\xec\x11\xec", 7);
} else {
ret = -EINVAL;
goto err;
}
break;
case SYS_DVBC_ANNEX_A:
/* IF 5070000 Hz, BW 8000000 Hz */
memcpy(if_val, "\x33\xea\xb3", 3);
memcpy(bw_val, "\xaf\x00\x00\x11\xec\x11\xec", 7);
break;
default:
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);
} else {
if_frequency = 0;
}
switch (if_frequency) {
case 3570000:
case 4570000:
case 5070000:
break;
default:
dev_err(&client->dev, "IF frequency %d not supported\n",
if_frequency);
ret = -EINVAL;
goto err;
}
ret = mn88473_wregs(dev, 0x1c05, "\x00", 1);
ret = mn88473_wregs(dev, 0x1cfb, "\x13", 1);
ret = mn88473_wregs(dev, 0x1cef, "\x13", 1);
ret = mn88473_wregs(dev, 0x1cf9, "\x13", 1);
ret = mn88473_wregs(dev, 0x1c00, "\x18", 1);
ret = mn88473_wregs(dev, 0x1c01, "\x01", 1);
ret = mn88473_wregs(dev, 0x1c02, "\x21", 1);
ret = mn88473_wreg(dev, 0x1c03, delivery_system_val);
ret = mn88473_wregs(dev, 0x1c0b, "\x00", 1);
for (i = 0; i < sizeof(if_val); i++) {
ret = mn88473_wreg(dev, 0x1c10 + i, if_val[i]);
if (ret)
goto err;
}
for (i = 0; i < sizeof(bw_val); i++) {
ret = mn88473_wreg(dev, 0x1c13 + i, bw_val[i]);
if (ret)
goto err;
}
ret = mn88473_wregs(dev, 0x1c2d, "\x3b", 1);
ret = mn88473_wregs(dev, 0x1c2e, "\x00", 1);
ret = mn88473_wregs(dev, 0x1c56, "\x0d", 1);
ret = mn88473_wregs(dev, 0x1801, "\xba", 1);
ret = mn88473_wregs(dev, 0x1802, "\x13", 1);
ret = mn88473_wregs(dev, 0x1803, "\x80", 1);
ret = mn88473_wregs(dev, 0x1804, "\xba", 1);
ret = mn88473_wregs(dev, 0x1805, "\x91", 1);
ret = mn88473_wregs(dev, 0x1807, "\xe7", 1);
ret = mn88473_wregs(dev, 0x1808, "\x28", 1);
ret = mn88473_wregs(dev, 0x180a, "\x1a", 1);
ret = mn88473_wregs(dev, 0x1813, "\x1f", 1);
ret = mn88473_wregs(dev, 0x1819, "\x03", 1);
ret = mn88473_wregs(dev, 0x181d, "\xb0", 1);
ret = mn88473_wregs(dev, 0x182a, "\x72", 1);
ret = mn88473_wregs(dev, 0x182d, "\x00", 1);
ret = mn88473_wregs(dev, 0x183c, "\x00", 1);
ret = mn88473_wregs(dev, 0x183f, "\xf8", 1);
ret = mn88473_wregs(dev, 0x1840, "\xf4", 1);
ret = mn88473_wregs(dev, 0x1841, "\x08", 1);
ret = mn88473_wregs(dev, 0x18d2, "\x29", 1);
ret = mn88473_wregs(dev, 0x18d4, "\x55", 1);
ret = mn88473_wregs(dev, 0x1a10, "\x10", 1);
ret = mn88473_wregs(dev, 0x1a11, "\xab", 1);
ret = mn88473_wregs(dev, 0x1a12, "\x0d", 1);
ret = mn88473_wregs(dev, 0x1a13, "\xae", 1);
ret = mn88473_wregs(dev, 0x1a14, "\x1d", 1);
ret = mn88473_wregs(dev, 0x1a15, "\x9d", 1);
ret = mn88473_wregs(dev, 0x1abe, "\x08", 1);
ret = mn88473_wregs(dev, 0x1c09, "\x08", 1);
ret = mn88473_wregs(dev, 0x1c08, "\x1d", 1);
ret = mn88473_wregs(dev, 0x18b2, "\x37", 1);
ret = mn88473_wregs(dev, 0x18d7, "\x04", 1);
ret = mn88473_wregs(dev, 0x1c32, "\x80", 1);
ret = mn88473_wregs(dev, 0x1c36, "\x00", 1);
ret = mn88473_wregs(dev, 0x1cf8, "\x9f", 1);
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 mn88473_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct i2c_client *client = fe->demodulator_priv;
struct mn88473_dev *dev = i2c_get_clientdata(client);
int ret;
*status = 0;
if (!dev->warm) {
ret = -EAGAIN;
goto err;
}
*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 mn88473_init(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->demodulator_priv;
struct mn88473_dev *dev = i2c_get_clientdata(client);
int ret, len, remaining;
const struct firmware *fw = NULL;
u8 *fw_file = MN88473_FIRMWARE;
dev_dbg(&client->dev, "\n");
if (dev->warm)
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 = mn88473_wreg(dev, 0x18f5, 0x03);
if (ret)
goto err;
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 = mn88473_wregs(dev, 0x18f6,
&fw->data[fw->size - remaining], len);
if (ret) {
dev_err(&client->dev, "firmware download failed=%d\n",
ret);
goto err;
}
}
ret = mn88473_wreg(dev, 0x18f5, 0x00);
if (ret)
goto err;
release_firmware(fw);
fw = NULL;
/* warm state */
dev->warm = true;
return 0;
err:
if (fw)
release_firmware(fw);
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int mn88473_sleep(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->demodulator_priv;
struct mn88473_dev *dev = i2c_get_clientdata(client);
int ret;
dev_dbg(&client->dev, "\n");
ret = mn88473_wreg(dev, 0x1c05, 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 mn88473_ops = {
.delsys = {SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_AC},
.info = {
.name = "Panasonic MN88473",
.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 = mn88473_get_tune_settings,
.init = mn88473_init,
.sleep = mn88473_sleep,
.set_frontend = mn88473_set_frontend,
.read_status = mn88473_read_status,
};
static int mn88473_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct mn88473_config *config = client->dev.platform_data;
struct mn88473_dev *dev;
int ret;
u8 u8tmp;
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->client[0] = client;
dev->i2c_wr_max = config->i2c_wr_max;
/* check demod answers to I2C */
ret = mn88473_rreg(dev, 0x1c00, &u8tmp);
if (ret)
goto err_kfree;
/*
* 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_kfree;
}
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_client_1_i2c_unregister_device;
}
i2c_set_clientdata(dev->client[2], dev);
/* create dvb_frontend */
memcpy(&dev->fe.ops, &mn88473_ops, sizeof(struct dvb_frontend_ops));
dev->fe.demodulator_priv = client;
*config->fe = &dev->fe;
i2c_set_clientdata(client, dev);
dev_info(&dev->client[0]->dev, "Panasonic MN88473 successfully attached\n");
return 0;
err_client_1_i2c_unregister_device:
i2c_unregister_device(dev->client[1]);
err_kfree:
kfree(dev);
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int mn88473_remove(struct i2c_client *client)
{
struct mn88473_dev *dev = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
i2c_unregister_device(dev->client[2]);
i2c_unregister_device(dev->client[1]);
kfree(dev);
return 0;
}
static const struct i2c_device_id mn88473_id_table[] = {
{"mn88473", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, mn88473_id_table);
static struct i2c_driver mn88473_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "mn88473",
},
.probe = mn88473_probe,
.remove = mn88473_remove,
.id_table = mn88473_id_table,
};
module_i2c_driver(mn88473_driver);
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Panasonic MN88473 DVB-T/T2/C demodulator driver");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE(MN88473_FIRMWARE);
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