/*
* 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 struct dvb_frontend_ops mn88472_ops;
/* write multiple registers */
static int mn88472_wregs(struct mn88472_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->i2c, msg, 1);
if (ret == 1) {
ret = 0;
} else {
dev_warn(&dev->i2c->dev,
"%s: i2c wr failed=%d reg=%02x len=%d\n",
KBUILD_MODNAME, ret, reg, len);
ret = -EREMOTEIO;
}
return ret;
}
/* read multiple registers */
static int mn88472_rregs(struct mn88472_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->i2c, msg, 2);
if (ret == 2) {
memcpy(val, buf, len);
ret = 0;
} else {
dev_warn(&dev->i2c->dev,
"%s: i2c rd failed=%d reg=%02x len=%d\n",
KBUILD_MODNAME, ret, reg, len);
ret = -EREMOTEIO;
}
return ret;
}
/* write single register */
static int mn88472_wreg(struct mn88472_dev *dev, u16 reg, u8 val)
{
return mn88472_wregs(dev, reg, &val, 1);
}
/* read single register */
static int mn88472_rreg(struct mn88472_dev *dev, u16 reg, u8 *val)
{
return mn88472_rregs(dev, reg, val, 1);
}
static int mn88472_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *s)
{
s->min_delay_ms = 400;
return 0;
}
static int mn88472_set_frontend(struct dvb_frontend *fe)
{
struct mn88472_dev *dev = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
u32 if_frequency = 0;
dev_dbg(&dev->i2c->dev,
"%s: delivery_system=%d modulation=%d frequency=%d symbol_rate=%d inversion=%d\n",
__func__, c->delivery_system, c->modulation,
c->frequency, c->symbol_rate, c->inversion);
if (!dev->warm) {
ret = -EAGAIN;
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(&dev->i2c->dev, "%s: get_if_frequency=%d\n",
__func__, if_frequency);
}
if (if_frequency != 5070000) {
dev_err(&dev->i2c->dev, "%s: IF frequency %d not supported\n",
KBUILD_MODNAME, if_frequency);
ret = -EINVAL;
goto err;
}
ret = mn88472_wregs(dev, 0x1c08, "\x1d", 1);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x18d9, "\xe3", 1);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x1c83, "\x01", 1);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x1c00, "\x66\x00\x01\x04\x00", 5);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x1c10,
"\x3f\x50\x2c\x8f\x80\x00\x08\xee\x08\xee", 10);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x1846, "\x00", 1);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x18ae, "\x00", 1);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x18b0, "\x0b", 1);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x18b4, "\x00", 1);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x18cd, "\x17", 1);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x18d4, "\x09", 1);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x18d6, "\x48", 1);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x1a00, "\xb0", 1);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x1cf8, "\x9f", 1);
if (ret)
goto err;
dev->delivery_system = c->delivery_system;
return 0;
err:
dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int mn88472_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct mn88472_dev *dev = fe->demodulator_priv;
int ret;
u8 u8tmp;
*status = 0;
if (!dev->warm) {
ret = -EAGAIN;
goto err;
}
ret = mn88472_rreg(dev, 0x1a84, &u8tmp);
if (ret)
goto err;
if (u8tmp == 0x08)
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
FE_HAS_SYNC | FE_HAS_LOCK;
return 0;
err:
dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int mn88472_init(struct dvb_frontend *fe)
{
struct mn88472_dev *dev = fe->demodulator_priv;
int ret, len, remaining;
const struct firmware *fw = NULL;
u8 *fw_file = MN88472_FIRMWARE;
dev_dbg(&dev->i2c->dev, "%s:\n", __func__);
/* set cold state by default */
dev->warm = false;
/* power on */
ret = mn88472_wreg(dev, 0x1c05, 0x00);
if (ret)
goto err;
ret = mn88472_wregs(dev, 0x1c0b, "\x00\x00", 2);
if (ret)
goto err;
/* request the firmware, this will block and timeout */
ret = request_firmware(&fw, fw_file, dev->i2c->dev.parent);
if (ret) {
dev_err(&dev->i2c->dev, "%s: firmare file '%s' not found\n",
KBUILD_MODNAME, fw_file);
goto err;
}
dev_info(&dev->i2c->dev, "%s: downloading firmware from file '%s'\n",
KBUILD_MODNAME, fw_file);
ret = mn88472_wreg(dev, 0x18f5, 0x03);
if (ret)
goto err;
for (remaining = fw->size; remaining > 0;
remaining -= (dev->cfg->i2c_wr_max - 1)) {
len = remaining;
if (len > (dev->cfg->i2c_wr_max - 1))
len = (dev->cfg->i2c_wr_max - 1);
ret = mn88472_wregs(dev, 0x18f6,
&fw->data[fw->size - remaining], len);
if (ret) {
dev_err(&dev->i2c->dev,
"%s: firmware download failed=%d\n",
KBUILD_MODNAME, ret);
goto err;
}
}
ret = mn88472_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(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int mn88472_sleep(struct dvb_frontend *fe)
{
struct mn88472_dev *dev = fe->demodulator_priv;
int ret;
dev_dbg(&dev->i2c->dev, "%s:\n", __func__);
/* power off */
ret = mn88472_wreg(dev, 0x1c0b, 0x30);
if (ret)
goto err;
ret = mn88472_wreg(dev, 0x1c05, 0x3e);
if (ret)
goto err;
dev->delivery_system = SYS_UNDEFINED;
return 0;
err:
dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static void mn88472_release(struct dvb_frontend *fe)
{
struct mn88472_dev *dev = fe->demodulator_priv;
kfree(dev);
}
struct dvb_frontend *mn88472_attach(const struct mn88472_config *cfg,
struct i2c_adapter *i2c)
{
int ret;
struct mn88472_dev *dev;
u8 u8tmp;
dev_dbg(&i2c->dev, "%s:\n", __func__);
/* allocate memory for the internal state */
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
ret = -ENOMEM;
dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
goto err;
}
dev->cfg = cfg;
dev->i2c = i2c;
/* check demod responds to I2C */
ret = mn88472_rreg(dev, 0x1c00, &u8tmp);
if (ret)
goto err;
/* create dvb_frontend */
memcpy(&dev->fe.ops, &mn88472_ops, sizeof(struct dvb_frontend_ops));
dev->fe.demodulator_priv = dev;
return &dev->fe;
err:
dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
kfree(dev);
return NULL;
}
EXPORT_SYMBOL(mn88472_attach);
static struct dvb_frontend_ops mn88472_ops = {
.delsys = {SYS_DVBC_ANNEX_A},
.info = {
.name = "Panasonic MN88472",
.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
},
.release = mn88472_release,
.get_tune_settings = mn88472_get_tune_settings,
.init = mn88472_init,
.sleep = mn88472_sleep,
.set_frontend = mn88472_set_frontend,
/* .get_frontend = mn88472_get_frontend, */
.read_status = mn88472_read_status,
/* .read_snr = mn88472_read_snr, */
};
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Panasonic MN88472 DVB-T/T2/C demodulator driver");
MODULE_LICENSE("GPL");
MODULE_FIRMWARE(MN88472_FIRMWARE);
