552 lines
13 KiB
C
552 lines
13 KiB
C
|
/*
|
||
|
|
* ZyDAS ZD1301 driver (demodulator)
|
||
|
|
*
|
||
|
|
* Copyright (C) 2015 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 "zd1301_demod.h"
|
||
|
|
|
||
|
|
static u8 zd1301_demod_gain = 0x38;
|
||
|
|
module_param_named(gain, zd1301_demod_gain, byte, 0644);
|
||
|
|
MODULE_PARM_DESC(gain, "gain (value: 0x00 - 0x70, default: 0x38)");
|
||
|
|
|
||
|
|
struct zd1301_demod_dev {
|
||
|
|
struct platform_device *pdev;
|
||
|
|
struct dvb_frontend frontend;
|
||
|
|
struct i2c_adapter adapter;
|
||
|
|
u8 gain;
|
||
|
|
};
|
||
|
|
|
||
|
|
static int zd1301_demod_wreg(struct zd1301_demod_dev *dev, u16 reg, u8 val)
|
||
|
|
{
|
||
|
|
struct platform_device *pdev = dev->pdev;
|
||
|
|
struct zd1301_demod_platform_data *pdata = pdev->dev.platform_data;
|
||
|
|
|
||
|
|
return pdata->reg_write(pdata->reg_priv, reg, val);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int zd1301_demod_rreg(struct zd1301_demod_dev *dev, u16 reg, u8 *val)
|
||
|
|
{
|
||
|
|
struct platform_device *pdev = dev->pdev;
|
||
|
|
struct zd1301_demod_platform_data *pdata = pdev->dev.platform_data;
|
||
|
|
|
||
|
|
return pdata->reg_read(pdata->reg_priv, reg, val);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int zd1301_demod_set_frontend(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
struct zd1301_demod_dev *dev = fe->demodulator_priv;
|
||
|
|
struct platform_device *pdev = dev->pdev;
|
||
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
||
|
|
int ret;
|
||
|
|
u32 if_frequency;
|
||
|
|
u8 r6a50_val;
|
||
|
|
|
||
|
|
dev_dbg(&pdev->dev, "frequency=%u bandwidth_hz=%u\n",
|
||
|
|
c->frequency, c->bandwidth_hz);
|
||
|
|
|
||
|
|
/* Program tuner */
|
||
|
|
if (fe->ops.tuner_ops.set_params &&
|
||
|
|
fe->ops.tuner_ops.get_if_frequency) {
|
||
|
|
ret = fe->ops.tuner_ops.set_params(fe);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
} else {
|
||
|
|
ret = -EINVAL;
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev_dbg(&pdev->dev, "if_frequency=%u\n", if_frequency);
|
||
|
|
if (if_frequency != 36150000) {
|
||
|
|
ret = -EINVAL;
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (c->bandwidth_hz) {
|
||
|
|
case 6000000:
|
||
|
|
r6a50_val = 0x78;
|
||
|
|
break;
|
||
|
|
case 7000000:
|
||
|
|
r6a50_val = 0x68;
|
||
|
|
break;
|
||
|
|
case 8000000:
|
||
|
|
r6a50_val = 0x58;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
ret = -EINVAL;
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a60, 0x11);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a47, 0x46);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a48, 0x46);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a4a, 0x15);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a4b, 0x63);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a5b, 0x99);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a3b, 0x10);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6806, 0x01);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a41, 0x08);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a42, 0x46);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a44, 0x14);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a45, 0x67);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a38, 0x00);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a4c, 0x52);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a49, 0x2a);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6840, 0x2e);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a50, r6a50_val);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a38, 0x07);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
err:
|
||
|
|
dev_dbg(&pdev->dev, "failed=%d\n", ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int zd1301_demod_sleep(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
struct zd1301_demod_dev *dev = fe->demodulator_priv;
|
||
|
|
struct platform_device *pdev = dev->pdev;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
dev_dbg(&pdev->dev, "\n");
|
||
|
|
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a43, 0x70);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x684e, 0x00);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6849, 0x00);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x68e2, 0xd7);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x68e0, 0x39);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6840, 0x21);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
err:
|
||
|
|
dev_dbg(&pdev->dev, "failed=%d\n", ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int zd1301_demod_init(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
struct zd1301_demod_dev *dev = fe->demodulator_priv;
|
||
|
|
struct platform_device *pdev = dev->pdev;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
dev_dbg(&pdev->dev, "\n");
|
||
|
|
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6840, 0x26);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x68e0, 0xff);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x68e2, 0xd8);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6849, 0x4e);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x684e, 0x01);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a43, zd1301_demod_gain);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
err:
|
||
|
|
dev_dbg(&pdev->dev, "failed=%d\n", ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int zd1301_demod_get_tune_settings(struct dvb_frontend *fe,
|
||
|
|
struct dvb_frontend_tune_settings *settings)
|
||
|
|
{
|
||
|
|
struct zd1301_demod_dev *dev = fe->demodulator_priv;
|
||
|
|
struct platform_device *pdev = dev->pdev;
|
||
|
|
|
||
|
|
dev_dbg(&pdev->dev, "\n");
|
||
|
|
|
||
|
|
/* ~180ms seems to be enough */
|
||
|
|
settings->min_delay_ms = 400;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int zd1301_demod_read_status(struct dvb_frontend *fe,
|
||
|
|
enum fe_status *status)
|
||
|
|
{
|
||
|
|
struct zd1301_demod_dev *dev = fe->demodulator_priv;
|
||
|
|
struct platform_device *pdev = dev->pdev;
|
||
|
|
int ret;
|
||
|
|
u8 u8tmp;
|
||
|
|
|
||
|
|
ret = zd1301_demod_rreg(dev, 0x6a24, &u8tmp);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
if (u8tmp > 0x00 && u8tmp < 0x20)
|
||
|
|
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI |
|
||
|
|
FE_HAS_SYNC | FE_HAS_LOCK;
|
||
|
|
else
|
||
|
|
*status = 0;
|
||
|
|
|
||
|
|
dev_dbg(&pdev->dev, "lock byte=%02x\n", u8tmp);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Interesting registers here are:
|
||
|
|
* 0x6a05: get some gain value
|
||
|
|
* 0x6a06: get about same gain value than set to 0x6a43
|
||
|
|
* 0x6a07: get some gain value
|
||
|
|
* 0x6a43: set gain value by driver
|
||
|
|
* 0x6a24: get demod lock bits (FSM stage?)
|
||
|
|
*
|
||
|
|
* Driver should implement some kind of algorithm to calculate suitable
|
||
|
|
* value for register 0x6a43, based likely values from register 0x6a05
|
||
|
|
* and 0x6a07. Looks like gain register 0x6a43 value could be from
|
||
|
|
* range 0x00 - 0x70.
|
||
|
|
*/
|
||
|
|
|
||
|
|
if (dev->gain != zd1301_demod_gain) {
|
||
|
|
dev->gain = zd1301_demod_gain;
|
||
|
|
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a43, dev->gain);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
err:
|
||
|
|
dev_dbg(&pdev->dev, "failed=%d\n", ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct dvb_frontend_ops zd1301_demod_ops = {
|
||
|
|
.delsys = {SYS_DVBT},
|
||
|
|
.info = {
|
||
|
|
.name = "ZyDAS ZD1301",
|
||
|
|
.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_TRANSMISSION_MODE_AUTO |
|
||
|
|
FE_CAN_GUARD_INTERVAL_AUTO |
|
||
|
|
FE_CAN_HIERARCHY_AUTO |
|
||
|
|
FE_CAN_MUTE_TS
|
||
|
|
},
|
||
|
|
|
||
|
|
.sleep = zd1301_demod_sleep,
|
||
|
|
.init = zd1301_demod_init,
|
||
|
|
.set_frontend = zd1301_demod_set_frontend,
|
||
|
|
.get_tune_settings = zd1301_demod_get_tune_settings,
|
||
|
|
.read_status = zd1301_demod_read_status,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct dvb_frontend *zd1301_demod_get_dvb_frontend(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct zd1301_demod_dev *dev = platform_get_drvdata(pdev);
|
||
|
|
|
||
|
|
dev_dbg(&pdev->dev, "\n");
|
||
|
|
|
||
|
|
return &dev->frontend;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(zd1301_demod_get_dvb_frontend);
|
||
|
|
|
||
|
|
static int zd1301_demod_i2c_master_xfer(struct i2c_adapter *adapter,
|
||
|
|
struct i2c_msg msg[], int num)
|
||
|
|
{
|
||
|
|
struct zd1301_demod_dev *dev = i2c_get_adapdata(adapter);
|
||
|
|
struct platform_device *pdev = dev->pdev;
|
||
|
|
int ret, i;
|
||
|
|
unsigned long timeout;
|
||
|
|
u8 u8tmp;
|
||
|
|
|
||
|
|
#define I2C_XFER_TIMEOUT 5
|
||
|
|
#define ZD1301_IS_I2C_XFER_WRITE_READ(_msg, _num) \
|
||
|
|
(_num == 2 && !(_msg[0].flags & I2C_M_RD) && (_msg[1].flags & I2C_M_RD))
|
||
|
|
#define ZD1301_IS_I2C_XFER_WRITE(_msg, _num) \
|
||
|
|
(_num == 1 && !(_msg[0].flags & I2C_M_RD))
|
||
|
|
#define ZD1301_IS_I2C_XFER_READ(_msg, _num) \
|
||
|
|
(_num == 1 && (_msg[0].flags & I2C_M_RD))
|
||
|
|
if (ZD1301_IS_I2C_XFER_WRITE_READ(msg, num)) {
|
||
|
|
dev_dbg(&pdev->dev, "write&read msg[0].len=%u msg[1].len=%u\n",
|
||
|
|
msg[0].len, msg[1].len);
|
||
|
|
if (msg[0].len > 1 || msg[1].len > 8) {
|
||
|
|
ret = -EOPNOTSUPP;
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6811, 0x80);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6812, 0x05);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6813, msg[1].addr << 1);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6801, msg[0].buf[0]);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6802, 0x00);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6803, 0x06);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6805, 0x00);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6804, msg[1].len);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
/* Poll xfer ready */
|
||
|
|
timeout = jiffies + msecs_to_jiffies(I2C_XFER_TIMEOUT);
|
||
|
|
for (u8tmp = 1; !time_after(jiffies, timeout) && u8tmp;) {
|
||
|
|
usleep_range(500, 800);
|
||
|
|
|
||
|
|
ret = zd1301_demod_rreg(dev, 0x6804, &u8tmp);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < msg[1].len; i++) {
|
||
|
|
ret = zd1301_demod_rreg(dev, 0x0600 + i, &msg[1].buf[i]);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
} else if (ZD1301_IS_I2C_XFER_WRITE(msg, num)) {
|
||
|
|
dev_dbg(&pdev->dev, "write msg[0].len=%u\n", msg[0].len);
|
||
|
|
if (msg[0].len > 1 + 8) {
|
||
|
|
ret = -EOPNOTSUPP;
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6811, 0x80);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6812, 0x01);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6813, msg[0].addr << 1);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6800, msg[0].buf[0]);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6802, 0x00);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6803, 0x06);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
for (i = 0; i < msg[0].len - 1; i++) {
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x0600 + i, msg[0].buf[1 + i]);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6805, 0x80);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6804, msg[0].len - 1);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
|
||
|
|
/* Poll xfer ready */
|
||
|
|
timeout = jiffies + msecs_to_jiffies(I2C_XFER_TIMEOUT);
|
||
|
|
for (u8tmp = 1; !time_after(jiffies, timeout) && u8tmp;) {
|
||
|
|
usleep_range(500, 800);
|
||
|
|
|
||
|
|
ret = zd1301_demod_rreg(dev, 0x6804, &u8tmp);
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
dev_dbg(&pdev->dev, "unknown msg[0].len=%u\n", msg[0].len);
|
||
|
|
ret = -EOPNOTSUPP;
|
||
|
|
if (ret)
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
return num;
|
||
|
|
err:
|
||
|
|
dev_dbg(&pdev->dev, "failed=%d\n", ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static u32 zd1301_demod_i2c_functionality(struct i2c_adapter *adapter)
|
||
|
|
{
|
||
|
|
return I2C_FUNC_I2C;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct i2c_algorithm zd1301_demod_i2c_algorithm = {
|
||
|
|
.master_xfer = zd1301_demod_i2c_master_xfer,
|
||
|
|
.functionality = zd1301_demod_i2c_functionality,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct i2c_adapter *zd1301_demod_get_i2c_adapter(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct zd1301_demod_dev *dev = platform_get_drvdata(pdev);
|
||
|
|
|
||
|
|
dev_dbg(&pdev->dev, "\n");
|
||
|
|
|
||
|
|
return &dev->adapter;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(zd1301_demod_get_i2c_adapter);
|
||
|
|
|
||
|
|
/* Platform driver interface */
|
||
|
|
static int zd1301_demod_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct zd1301_demod_dev *dev;
|
||
|
|
struct zd1301_demod_platform_data *pdata = pdev->dev.platform_data;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
dev_dbg(&pdev->dev, "\n");
|
||
|
|
|
||
|
|
if (!pdata) {
|
||
|
|
ret = -EINVAL;
|
||
|
|
dev_err(&pdev->dev, "cannot proceed without platform data\n");
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
if (!pdev->dev.parent->driver) {
|
||
|
|
ret = -EINVAL;
|
||
|
|
dev_dbg(&pdev->dev, "no parent device\n");
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
|
||
|
|
if (!dev) {
|
||
|
|
ret = -ENOMEM;
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Setup the state */
|
||
|
|
dev->pdev = pdev;
|
||
|
|
dev->gain = zd1301_demod_gain;
|
||
|
|
|
||
|
|
/* Sleep */
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6840, 0x21);
|
||
|
|
if (ret)
|
||
|
|
goto err_kfree;
|
||
|
|
ret = zd1301_demod_wreg(dev, 0x6a38, 0x07);
|
||
|
|
if (ret)
|
||
|
|
goto err_kfree;
|
||
|
|
|
||
|
|
/* Create I2C adapter */
|
||
|
|
strlcpy(dev->adapter.name, "ZyDAS ZD1301 demod", sizeof(dev->adapter.name));
|
||
|
|
dev->adapter.algo = &zd1301_demod_i2c_algorithm;
|
||
|
|
dev->adapter.algo_data = NULL;
|
||
|
|
dev->adapter.dev.parent = pdev->dev.parent;
|
||
|
|
i2c_set_adapdata(&dev->adapter, dev);
|
||
|
|
ret = i2c_add_adapter(&dev->adapter);
|
||
|
|
if (ret) {
|
||
|
|
dev_err(&pdev->dev, "I2C adapter add failed %d\n", ret);
|
||
|
|
goto err_kfree;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Create dvb frontend */
|
||
|
|
memcpy(&dev->frontend.ops, &zd1301_demod_ops, sizeof(dev->frontend.ops));
|
||
|
|
dev->frontend.demodulator_priv = dev;
|
||
|
|
platform_set_drvdata(pdev, dev);
|
||
|
|
dev_info(&pdev->dev, "ZyDAS ZD1301 demod attached\n");
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
err_kfree:
|
||
|
|
kfree(dev);
|
||
|
|
err:
|
||
|
|
dev_dbg(&pdev->dev, "failed=%d\n", ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int zd1301_demod_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct zd1301_demod_dev *dev = platform_get_drvdata(pdev);
|
||
|
|
|
||
|
|
dev_dbg(&pdev->dev, "\n");
|
||
|
|
|
||
|
|
i2c_del_adapter(&dev->adapter);
|
||
|
|
kfree(dev);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_driver zd1301_demod_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "zd1301_demod",
|
||
|
|
.suppress_bind_attrs = true,
|
||
|
|
},
|
||
|
|
.probe = zd1301_demod_probe,
|
||
|
|
.remove = zd1301_demod_remove,
|
||
|
|
};
|
||
|
|
module_platform_driver(zd1301_demod_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
|
||
|
|
MODULE_DESCRIPTION("ZyDAS ZD1301 demodulator driver");
|
||
|
|
MODULE_LICENSE("GPL");
|