mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 21:24:00 +08:00
28fd31f82d
Driver conversion from proprietary DVB tuner model to more general I2C driver model. Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
501 lines
11 KiB
C
501 lines
11 KiB
C
/*
|
|
* Elonics E4000 silicon tuner driver
|
|
*
|
|
* Copyright (C) 2012 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.
|
|
*
|
|
* 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.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "e4000_priv.h"
|
|
#include <linux/math64.h>
|
|
|
|
/* Max transfer size done by I2C transfer functions */
|
|
#define MAX_XFER_SIZE 64
|
|
|
|
/* write multiple registers */
|
|
static int e4000_wr_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len)
|
|
{
|
|
int ret;
|
|
u8 buf[MAX_XFER_SIZE];
|
|
struct i2c_msg msg[1] = {
|
|
{
|
|
.addr = priv->client->addr,
|
|
.flags = 0,
|
|
.len = 1 + len,
|
|
.buf = buf,
|
|
}
|
|
};
|
|
|
|
if (1 + len > sizeof(buf)) {
|
|
dev_warn(&priv->client->dev,
|
|
"%s: i2c wr reg=%04x: len=%d is too big!\n",
|
|
KBUILD_MODNAME, reg, len);
|
|
return -EINVAL;
|
|
}
|
|
|
|
buf[0] = reg;
|
|
memcpy(&buf[1], val, len);
|
|
|
|
ret = i2c_transfer(priv->client->adapter, msg, 1);
|
|
if (ret == 1) {
|
|
ret = 0;
|
|
} else {
|
|
dev_warn(&priv->client->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 e4000_rd_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len)
|
|
{
|
|
int ret;
|
|
u8 buf[MAX_XFER_SIZE];
|
|
struct i2c_msg msg[2] = {
|
|
{
|
|
.addr = priv->client->addr,
|
|
.flags = 0,
|
|
.len = 1,
|
|
.buf = ®,
|
|
}, {
|
|
.addr = priv->client->addr,
|
|
.flags = I2C_M_RD,
|
|
.len = len,
|
|
.buf = buf,
|
|
}
|
|
};
|
|
|
|
if (len > sizeof(buf)) {
|
|
dev_warn(&priv->client->dev,
|
|
"%s: i2c rd reg=%04x: len=%d is too big!\n",
|
|
KBUILD_MODNAME, reg, len);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = i2c_transfer(priv->client->adapter, msg, 2);
|
|
if (ret == 2) {
|
|
memcpy(val, buf, len);
|
|
ret = 0;
|
|
} else {
|
|
dev_warn(&priv->client->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 e4000_wr_reg(struct e4000_priv *priv, u8 reg, u8 val)
|
|
{
|
|
return e4000_wr_regs(priv, reg, &val, 1);
|
|
}
|
|
|
|
/* read single register */
|
|
static int e4000_rd_reg(struct e4000_priv *priv, u8 reg, u8 *val)
|
|
{
|
|
return e4000_rd_regs(priv, reg, val, 1);
|
|
}
|
|
|
|
static int e4000_init(struct dvb_frontend *fe)
|
|
{
|
|
struct e4000_priv *priv = fe->tuner_priv;
|
|
int ret;
|
|
|
|
dev_dbg(&priv->client->dev, "%s:\n", __func__);
|
|
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
|
|
|
/* dummy I2C to ensure I2C wakes up */
|
|
ret = e4000_wr_reg(priv, 0x02, 0x40);
|
|
|
|
/* reset */
|
|
ret = e4000_wr_reg(priv, 0x00, 0x01);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
/* disable output clock */
|
|
ret = e4000_wr_reg(priv, 0x06, 0x00);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = e4000_wr_reg(priv, 0x7a, 0x96);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
/* configure gains */
|
|
ret = e4000_wr_regs(priv, 0x7e, "\x01\xfe", 2);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = e4000_wr_reg(priv, 0x82, 0x00);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = e4000_wr_reg(priv, 0x24, 0x05);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = e4000_wr_regs(priv, 0x87, "\x20\x01", 2);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = e4000_wr_regs(priv, 0x9f, "\x7f\x07", 2);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
/* DC offset control */
|
|
ret = e4000_wr_reg(priv, 0x2d, 0x1f);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = e4000_wr_regs(priv, 0x70, "\x01\x01", 2);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
/* gain control */
|
|
ret = e4000_wr_reg(priv, 0x1a, 0x17);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = e4000_wr_reg(priv, 0x1f, 0x1a);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
|
|
return 0;
|
|
err:
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
|
|
dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int e4000_sleep(struct dvb_frontend *fe)
|
|
{
|
|
struct e4000_priv *priv = fe->tuner_priv;
|
|
int ret;
|
|
|
|
dev_dbg(&priv->client->dev, "%s:\n", __func__);
|
|
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
|
|
|
ret = e4000_wr_reg(priv, 0x00, 0x00);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
|
|
return 0;
|
|
err:
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
|
|
dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int e4000_set_params(struct dvb_frontend *fe)
|
|
{
|
|
struct e4000_priv *priv = fe->tuner_priv;
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
|
int ret, i, sigma_delta;
|
|
unsigned int f_vco;
|
|
u8 buf[5], i_data[4], q_data[4];
|
|
|
|
dev_dbg(&priv->client->dev,
|
|
"%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
|
|
__func__, c->delivery_system, c->frequency,
|
|
c->bandwidth_hz);
|
|
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
|
|
|
/* gain control manual */
|
|
ret = e4000_wr_reg(priv, 0x1a, 0x00);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
/* PLL */
|
|
for (i = 0; i < ARRAY_SIZE(e4000_pll_lut); i++) {
|
|
if (c->frequency <= e4000_pll_lut[i].freq)
|
|
break;
|
|
}
|
|
|
|
if (i == ARRAY_SIZE(e4000_pll_lut)) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Note: Currently f_vco overflows when c->frequency is 1 073 741 824 Hz
|
|
* or more.
|
|
*/
|
|
f_vco = c->frequency * e4000_pll_lut[i].mul;
|
|
sigma_delta = div_u64(0x10000ULL * (f_vco % priv->clock), priv->clock);
|
|
buf[0] = f_vco / priv->clock;
|
|
buf[1] = (sigma_delta >> 0) & 0xff;
|
|
buf[2] = (sigma_delta >> 8) & 0xff;
|
|
buf[3] = 0x00;
|
|
buf[4] = e4000_pll_lut[i].div;
|
|
|
|
dev_dbg(&priv->client->dev,
|
|
"%s: f_vco=%u pll div=%d sigma_delta=%04x\n",
|
|
__func__, f_vco, buf[0], sigma_delta);
|
|
|
|
ret = e4000_wr_regs(priv, 0x09, buf, 5);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
/* LNA filter (RF filter) */
|
|
for (i = 0; i < ARRAY_SIZE(e400_lna_filter_lut); i++) {
|
|
if (c->frequency <= e400_lna_filter_lut[i].freq)
|
|
break;
|
|
}
|
|
|
|
if (i == ARRAY_SIZE(e400_lna_filter_lut)) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
ret = e4000_wr_reg(priv, 0x10, e400_lna_filter_lut[i].val);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
/* IF filters */
|
|
for (i = 0; i < ARRAY_SIZE(e4000_if_filter_lut); i++) {
|
|
if (c->bandwidth_hz <= e4000_if_filter_lut[i].freq)
|
|
break;
|
|
}
|
|
|
|
if (i == ARRAY_SIZE(e4000_if_filter_lut)) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
buf[0] = e4000_if_filter_lut[i].reg11_val;
|
|
buf[1] = e4000_if_filter_lut[i].reg12_val;
|
|
|
|
ret = e4000_wr_regs(priv, 0x11, buf, 2);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
/* frequency band */
|
|
for (i = 0; i < ARRAY_SIZE(e4000_band_lut); i++) {
|
|
if (c->frequency <= e4000_band_lut[i].freq)
|
|
break;
|
|
}
|
|
|
|
if (i == ARRAY_SIZE(e4000_band_lut)) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
ret = e4000_wr_reg(priv, 0x07, e4000_band_lut[i].reg07_val);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = e4000_wr_reg(priv, 0x78, e4000_band_lut[i].reg78_val);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
/* DC offset */
|
|
for (i = 0; i < 4; i++) {
|
|
if (i == 0)
|
|
ret = e4000_wr_regs(priv, 0x15, "\x00\x7e\x24", 3);
|
|
else if (i == 1)
|
|
ret = e4000_wr_regs(priv, 0x15, "\x00\x7f", 2);
|
|
else if (i == 2)
|
|
ret = e4000_wr_regs(priv, 0x15, "\x01", 1);
|
|
else
|
|
ret = e4000_wr_regs(priv, 0x16, "\x7e", 1);
|
|
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = e4000_wr_reg(priv, 0x29, 0x01);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = e4000_rd_regs(priv, 0x2a, buf, 3);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
i_data[i] = (((buf[2] >> 0) & 0x3) << 6) | (buf[0] & 0x3f);
|
|
q_data[i] = (((buf[2] >> 4) & 0x3) << 6) | (buf[1] & 0x3f);
|
|
}
|
|
|
|
swap(q_data[2], q_data[3]);
|
|
swap(i_data[2], i_data[3]);
|
|
|
|
ret = e4000_wr_regs(priv, 0x50, q_data, 4);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
ret = e4000_wr_regs(priv, 0x60, i_data, 4);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
/* gain control auto */
|
|
ret = e4000_wr_reg(priv, 0x1a, 0x17);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
|
|
return 0;
|
|
err:
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
|
|
dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int e4000_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
|
|
{
|
|
struct e4000_priv *priv = fe->tuner_priv;
|
|
|
|
dev_dbg(&priv->client->dev, "%s:\n", __func__);
|
|
|
|
*frequency = 0; /* Zero-IF */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dvb_tuner_ops e4000_tuner_ops = {
|
|
.info = {
|
|
.name = "Elonics E4000",
|
|
.frequency_min = 174000000,
|
|
.frequency_max = 862000000,
|
|
},
|
|
|
|
.init = e4000_init,
|
|
.sleep = e4000_sleep,
|
|
.set_params = e4000_set_params,
|
|
|
|
.get_if_frequency = e4000_get_if_frequency,
|
|
};
|
|
|
|
static int e4000_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct e4000_config *cfg = client->dev.platform_data;
|
|
struct dvb_frontend *fe = cfg->fe;
|
|
struct e4000_priv *priv;
|
|
int ret;
|
|
u8 chip_id;
|
|
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 1);
|
|
|
|
priv = kzalloc(sizeof(struct e4000_priv), GFP_KERNEL);
|
|
if (!priv) {
|
|
ret = -ENOMEM;
|
|
dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
|
|
goto err;
|
|
}
|
|
|
|
priv->clock = cfg->clock;
|
|
priv->client = client;
|
|
priv->fe = cfg->fe;
|
|
|
|
/* check if the tuner is there */
|
|
ret = e4000_rd_reg(priv, 0x02, &chip_id);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
dev_dbg(&priv->client->dev,
|
|
"%s: chip_id=%02x\n", __func__, chip_id);
|
|
|
|
if (chip_id != 0x40) {
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
|
|
/* put sleep as chip seems to be in normal mode by default */
|
|
ret = e4000_wr_reg(priv, 0x00, 0x00);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
dev_info(&priv->client->dev,
|
|
"%s: Elonics E4000 successfully identified\n",
|
|
KBUILD_MODNAME);
|
|
|
|
fe->tuner_priv = priv;
|
|
memcpy(&fe->ops.tuner_ops, &e4000_tuner_ops,
|
|
sizeof(struct dvb_tuner_ops));
|
|
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
|
|
i2c_set_clientdata(client, priv);
|
|
|
|
return 0;
|
|
err:
|
|
if (fe->ops.i2c_gate_ctrl)
|
|
fe->ops.i2c_gate_ctrl(fe, 0);
|
|
|
|
dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret);
|
|
kfree(priv);
|
|
return ret;
|
|
}
|
|
|
|
static int e4000_remove(struct i2c_client *client)
|
|
{
|
|
struct e4000_priv *priv = i2c_get_clientdata(client);
|
|
struct dvb_frontend *fe = priv->fe;
|
|
|
|
dev_dbg(&client->dev, "%s:\n", __func__);
|
|
|
|
memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
|
|
fe->tuner_priv = NULL;
|
|
kfree(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id e4000_id[] = {
|
|
{"e4000", 0},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, e4000_id);
|
|
|
|
static struct i2c_driver e4000_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "e4000",
|
|
},
|
|
.probe = e4000_probe,
|
|
.remove = e4000_remove,
|
|
.id_table = e4000_id,
|
|
};
|
|
|
|
module_i2c_driver(e4000_driver);
|
|
|
|
MODULE_DESCRIPTION("Elonics E4000 silicon tuner driver");
|
|
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
|
|
MODULE_LICENSE("GPL");
|