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m88ds3103.c
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/*
* Montage M88DS3103/M88RS6000 demodulator driver
*
* Copyright (C) 2013 Antti Palosaari <[email protected]>
*
* 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 "m88ds3103_priv.h"
static struct dvb_frontend_ops m88ds3103_ops;
/* write multiple registers */
static int m88ds3103_wr_regs(struct m88ds3103_priv *priv,
u8 reg, const u8 *val, int len)
{
#define MAX_WR_LEN 32
#define MAX_WR_XFER_LEN (MAX_WR_LEN + 1)
int ret;
u8 buf[MAX_WR_XFER_LEN];
struct i2c_msg msg[1] = {
{
.addr = priv->cfg->i2c_addr,
.flags = 0,
.len = 1 + len,
.buf = buf,
}
};
if (WARN_ON(len > MAX_WR_LEN))
return -EINVAL;
buf[0] = reg;
memcpy(&buf[1], val, len);
mutex_lock(&priv->i2c_mutex);
ret = i2c_transfer(priv->i2c, msg, 1);
mutex_unlock(&priv->i2c_mutex);
if (ret == 1) {
ret = 0;
} else {
dev_warn(&priv->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 m88ds3103_rd_regs(struct m88ds3103_priv *priv,
u8 reg, u8 *val, int len)
{
#define MAX_RD_LEN 3
#define MAX_RD_XFER_LEN (MAX_RD_LEN)
int ret;
u8 buf[MAX_RD_XFER_LEN];
struct i2c_msg msg[2] = {
{
.addr = priv->cfg->i2c_addr,
.flags = 0,
.len = 1,
.buf = ®,
}, {
.addr = priv->cfg->i2c_addr,
.flags = I2C_M_RD,
.len = len,
.buf = buf,
}
};
if (WARN_ON(len > MAX_RD_LEN))
return -EINVAL;
mutex_lock(&priv->i2c_mutex);
ret = i2c_transfer(priv->i2c, msg, 2);
mutex_unlock(&priv->i2c_mutex);
if (ret == 2) {
memcpy(val, buf, len);
ret = 0;
} else {
dev_warn(&priv->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 m88ds3103_wr_reg(struct m88ds3103_priv *priv, u8 reg, u8 val)
{
return m88ds3103_wr_regs(priv, reg, &val, 1);
}
/* read single register */
static int m88ds3103_rd_reg(struct m88ds3103_priv *priv, u8 reg, u8 *val)
{
return m88ds3103_rd_regs(priv, reg, val, 1);
}
/* write single register with mask */
static int m88ds3103_wr_reg_mask(struct m88ds3103_priv *priv,
u8 reg, u8 val, u8 mask)
{
int ret;
u8 u8tmp;
/* no need for read if whole reg is written */
if (mask != 0xff) {
ret = m88ds3103_rd_regs(priv, reg, &u8tmp, 1);
if (ret)
return ret;
val &= mask;
u8tmp &= ~mask;
val |= u8tmp;
}
return m88ds3103_wr_regs(priv, reg, &val, 1);
}
/* read single register with mask */
static int m88ds3103_rd_reg_mask(struct m88ds3103_priv *priv,
u8 reg, u8 *val, u8 mask)
{
int ret, i;
u8 u8tmp;
ret = m88ds3103_rd_regs(priv, reg, &u8tmp, 1);
if (ret)
return ret;
u8tmp &= mask;
/* find position of the first bit */
for (i = 0; i < 8; i++) {
if ((mask >> i) & 0x01)
break;
}
*val = u8tmp >> i;
return 0;
}
/* write reg val table using reg addr auto increment */
static int m88ds3103_wr_reg_val_tab(struct m88ds3103_priv *priv,
const struct m88ds3103_reg_val *tab, int tab_len)
{
int ret, i, j;
u8 buf[83];
dev_dbg(&priv->i2c->dev, "%s: tab_len=%d\n", __func__, tab_len);
if (tab_len > 86) {
ret = -EINVAL;
goto err;
}
for (i = 0, j = 0; i < tab_len; i++, j++) {
buf[j] = tab[i].val;
if (i == tab_len - 1 || tab[i].reg != tab[i + 1].reg - 1 ||
!((j + 1) % (priv->cfg->i2c_wr_max - 1))) {
ret = m88ds3103_wr_regs(priv, tab[i].reg - j, buf, j + 1);
if (ret)
goto err;
j = -1;
}
}
return 0;
err:
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int m88ds3103_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct m88ds3103_priv *priv = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
u8 u8tmp;
*status = 0;
if (!priv->warm) {
ret = -EAGAIN;
goto err;
}
switch (c->delivery_system) {
case SYS_DVBS:
ret = m88ds3103_rd_reg_mask(priv, 0xd1, &u8tmp, 0x07);
if (ret)
goto err;
if (u8tmp == 0x07)
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
FE_HAS_VITERBI | FE_HAS_SYNC |
FE_HAS_LOCK;
break;
case SYS_DVBS2:
ret = m88ds3103_rd_reg_mask(priv, 0x0d, &u8tmp, 0x8f);
if (ret)
goto err;
if (u8tmp == 0x8f)
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
FE_HAS_VITERBI | FE_HAS_SYNC |
FE_HAS_LOCK;
break;
default:
dev_dbg(&priv->i2c->dev, "%s: invalid delivery_system\n",
__func__);
ret = -EINVAL;
goto err;
}
priv->fe_status = *status;
dev_dbg(&priv->i2c->dev, "%s: lock=%02x status=%02x\n",
__func__, u8tmp, *status);
return 0;
err:
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int m88ds3103_set_frontend(struct dvb_frontend *fe)
{
struct m88ds3103_priv *priv = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret, len;
const struct m88ds3103_reg_val *init;
u8 u8tmp, u8tmp1 = 0, u8tmp2 = 0; /* silence compiler warning */
u8 buf[3];
u16 u16tmp, divide_ratio = 0;
u32 tuner_frequency, target_mclk;
s32 s32tmp;
dev_dbg(&priv->i2c->dev,
"%s: delivery_system=%d modulation=%d frequency=%d symbol_rate=%d inversion=%d pilot=%d rolloff=%d\n",
__func__, c->delivery_system,
c->modulation, c->frequency, c->symbol_rate,
c->inversion, c->pilot, c->rolloff);
if (!priv->warm) {
ret = -EAGAIN;
goto err;
}
/* reset */
ret = m88ds3103_wr_reg(priv, 0x07, 0x80);
if (ret)
goto err;
ret = m88ds3103_wr_reg(priv, 0x07, 0x00);
if (ret)
goto err;
/* Disable demod clock path */
if (priv->chip_id == M88RS6000_CHIP_ID) {
ret = m88ds3103_wr_reg(priv, 0x06, 0xe0);
if (ret)
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_frequency) {
ret = fe->ops.tuner_ops.get_frequency(fe, &tuner_frequency);
if (ret)
goto err;
} else {
/*
* Use nominal target frequency as tuner driver does not provide
* actual frequency used. Carrier offset calculation is not
* valid.
*/
tuner_frequency = c->frequency;
}
/* select M88RS6000 demod main mclk and ts mclk from tuner die. */
if (priv->chip_id == M88RS6000_CHIP_ID) {
if (c->symbol_rate > 45010000)
priv->mclk_khz = 110250;
else
priv->mclk_khz = 96000;
if (c->delivery_system == SYS_DVBS)
target_mclk = 96000;
else
target_mclk = 144000;
/* Enable demod clock path */
ret = m88ds3103_wr_reg(priv, 0x06, 0x00);
if (ret)
goto err;
usleep_range(10000, 20000);
} else {
/* set M88DS3103 mclk and ts mclk. */
priv->mclk_khz = 96000;
switch (priv->cfg->ts_mode) {
case M88DS3103_TS_SERIAL:
case M88DS3103_TS_SERIAL_D7:
target_mclk = priv->cfg->ts_clk;
break;
case M88DS3103_TS_PARALLEL:
case M88DS3103_TS_CI:
if (c->delivery_system == SYS_DVBS)
target_mclk = 96000;
else {
if (c->symbol_rate < 18000000)
target_mclk = 96000;
else if (c->symbol_rate < 28000000)
target_mclk = 144000;
else
target_mclk = 192000;
}
break;
default:
dev_dbg(&priv->i2c->dev, "%s: invalid ts_mode\n",
__func__);
ret = -EINVAL;
goto err;
}
switch (target_mclk) {
case 96000:
u8tmp1 = 0x02; /* 0b10 */
u8tmp2 = 0x01; /* 0b01 */
break;
case 144000:
u8tmp1 = 0x00; /* 0b00 */
u8tmp2 = 0x01; /* 0b01 */
break;
case 192000:
u8tmp1 = 0x03; /* 0b11 */
u8tmp2 = 0x00; /* 0b00 */
break;
}
ret = m88ds3103_wr_reg_mask(priv, 0x22, u8tmp1 << 6, 0xc0);
if (ret)
goto err;
ret = m88ds3103_wr_reg_mask(priv, 0x24, u8tmp2 << 6, 0xc0);
if (ret)
goto err;
}
ret = m88ds3103_wr_reg(priv, 0xb2, 0x01);
if (ret)
goto err;
ret = m88ds3103_wr_reg(priv, 0x00, 0x01);
if (ret)
goto err;
switch (c->delivery_system) {
case SYS_DVBS:
if (priv->chip_id == M88RS6000_CHIP_ID) {
len = ARRAY_SIZE(m88rs6000_dvbs_init_reg_vals);
init = m88rs6000_dvbs_init_reg_vals;
} else {
len = ARRAY_SIZE(m88ds3103_dvbs_init_reg_vals);
init = m88ds3103_dvbs_init_reg_vals;
}
break;
case SYS_DVBS2:
if (priv->chip_id == M88RS6000_CHIP_ID) {
len = ARRAY_SIZE(m88rs6000_dvbs2_init_reg_vals);
init = m88rs6000_dvbs2_init_reg_vals;
} else {
len = ARRAY_SIZE(m88ds3103_dvbs2_init_reg_vals);
init = m88ds3103_dvbs2_init_reg_vals;
}
break;
default:
dev_dbg(&priv->i2c->dev, "%s: invalid delivery_system\n",
__func__);
ret = -EINVAL;
goto err;
}
/* program init table */
if (c->delivery_system != priv->delivery_system) {
ret = m88ds3103_wr_reg_val_tab(priv, init, len);
if (ret)
goto err;
}
if (priv->chip_id == M88RS6000_CHIP_ID) {
if ((c->delivery_system == SYS_DVBS2)
&& ((c->symbol_rate / 1000) <= 5000)) {
ret = m88ds3103_wr_reg(priv, 0xc0, 0x04);
if (ret)
goto err;
buf[0] = 0x09;
buf[1] = 0x22;
buf[2] = 0x88;
ret = m88ds3103_wr_regs(priv, 0x8a, buf, 3);
if (ret)
goto err;
}
ret = m88ds3103_wr_reg_mask(priv, 0x9d, 0x08, 0x08);
if (ret)
goto err;
ret = m88ds3103_wr_reg(priv, 0xf1, 0x01);
if (ret)
goto err;
ret = m88ds3103_wr_reg_mask(priv, 0x30, 0x80, 0x80);
if (ret)
goto err;
}
switch (priv->cfg->ts_mode) {
case M88DS3103_TS_SERIAL:
u8tmp1 = 0x00;
u8tmp = 0x06;
break;
case M88DS3103_TS_SERIAL_D7:
u8tmp1 = 0x20;
u8tmp = 0x06;
break;
case M88DS3103_TS_PARALLEL:
u8tmp = 0x02;
break;
case M88DS3103_TS_CI:
u8tmp = 0x03;
break;
default:
dev_dbg(&priv->i2c->dev, "%s: invalid ts_mode\n", __func__);
ret = -EINVAL;
goto err;
}
if (priv->cfg->ts_clk_pol)
u8tmp |= 0x40;
/* TS mode */
ret = m88ds3103_wr_reg(priv, 0xfd, u8tmp);
if (ret)
goto err;
switch (priv->cfg->ts_mode) {
case M88DS3103_TS_SERIAL:
case M88DS3103_TS_SERIAL_D7:
ret = m88ds3103_wr_reg_mask(priv, 0x29, u8tmp1, 0x20);
if (ret)
goto err;
u8tmp1 = 0;
u8tmp2 = 0;
break;
default:
if (priv->cfg->ts_clk) {
divide_ratio = DIV_ROUND_UP(target_mclk, priv->cfg->ts_clk);
u8tmp1 = divide_ratio / 2;
u8tmp2 = DIV_ROUND_UP(divide_ratio, 2);
}
}
dev_dbg(&priv->i2c->dev,
"%s: target_mclk=%d ts_clk=%d divide_ratio=%d\n",
__func__, target_mclk, priv->cfg->ts_clk, divide_ratio);
u8tmp1--;
u8tmp2--;
/* u8tmp1[5:2] => fe[3:0], u8tmp1[1:0] => ea[7:6] */
u8tmp1 &= 0x3f;
/* u8tmp2[5:0] => ea[5:0] */
u8tmp2 &= 0x3f;
ret = m88ds3103_rd_reg(priv, 0xfe, &u8tmp);
if (ret)
goto err;
u8tmp = ((u8tmp & 0xf0) << 0) | u8tmp1 >> 2;
ret = m88ds3103_wr_reg(priv, 0xfe, u8tmp);
if (ret)
goto err;
u8tmp = ((u8tmp1 & 0x03) << 6) | u8tmp2 >> 0;
ret = m88ds3103_wr_reg(priv, 0xea, u8tmp);
if (ret)
goto err;
if (c->symbol_rate <= 3000000)
u8tmp = 0x20;
else if (c->symbol_rate <= 10000000)
u8tmp = 0x10;
else
u8tmp = 0x06;
ret = m88ds3103_wr_reg(priv, 0xc3, 0x08);
if (ret)
goto err;
ret = m88ds3103_wr_reg(priv, 0xc8, u8tmp);
if (ret)
goto err;
ret = m88ds3103_wr_reg(priv, 0xc4, 0x08);
if (ret)
goto err;
ret = m88ds3103_wr_reg(priv, 0xc7, 0x00);
if (ret)
goto err;
u16tmp = DIV_ROUND_CLOSEST((c->symbol_rate / 1000) << 15, priv->mclk_khz / 2);
buf[0] = (u16tmp >> 0) & 0xff;
buf[1] = (u16tmp >> 8) & 0xff;
ret = m88ds3103_wr_regs(priv, 0x61, buf, 2);
if (ret)
goto err;
ret = m88ds3103_wr_reg_mask(priv, 0x4d, priv->cfg->spec_inv << 1, 0x02);
if (ret)
goto err;
ret = m88ds3103_wr_reg_mask(priv, 0x30, priv->cfg->agc_inv << 4, 0x10);
if (ret)
goto err;
ret = m88ds3103_wr_reg(priv, 0x33, priv->cfg->agc);
if (ret)
goto err;
dev_dbg(&priv->i2c->dev, "%s: carrier offset=%d\n", __func__,
(tuner_frequency - c->frequency));
s32tmp = 0x10000 * (tuner_frequency - c->frequency);
s32tmp = DIV_ROUND_CLOSEST(s32tmp, priv->mclk_khz);
if (s32tmp < 0)
s32tmp += 0x10000;
buf[0] = (s32tmp >> 0) & 0xff;
buf[1] = (s32tmp >> 8) & 0xff;
ret = m88ds3103_wr_regs(priv, 0x5e, buf, 2);
if (ret)
goto err;
ret = m88ds3103_wr_reg(priv, 0x00, 0x00);
if (ret)
goto err;
ret = m88ds3103_wr_reg(priv, 0xb2, 0x00);
if (ret)
goto err;
priv->delivery_system = c->delivery_system;
return 0;
err:
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int m88ds3103_init(struct dvb_frontend *fe)
{
struct m88ds3103_priv *priv = fe->demodulator_priv;
int ret, len, remaining;
const struct firmware *fw = NULL;
u8 *fw_file;
u8 u8tmp;
dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
/* set cold state by default */
priv->warm = false;
/* wake up device from sleep */
ret = m88ds3103_wr_reg_mask(priv, 0x08, 0x01, 0x01);
if (ret)
goto err;
ret = m88ds3103_wr_reg_mask(priv, 0x04, 0x00, 0x01);
if (ret)
goto err;
ret = m88ds3103_wr_reg_mask(priv, 0x23, 0x00, 0x10);
if (ret)
goto err;
/* firmware status */
ret = m88ds3103_rd_reg(priv, 0xb9, &u8tmp);
if (ret)
goto err;
dev_dbg(&priv->i2c->dev, "%s: firmware=%02x\n", __func__, u8tmp);
if (u8tmp)
goto skip_fw_download;
/* global reset, global diseqc reset, golbal fec reset */
ret = m88ds3103_wr_reg(priv, 0x07, 0xe0);
if (ret)
goto err;
ret = m88ds3103_wr_reg(priv, 0x07, 0x00);
if (ret)
goto err;
/* cold state - try to download firmware */
dev_info(&priv->i2c->dev, "%s: found a '%s' in cold state\n",
KBUILD_MODNAME, m88ds3103_ops.info.name);
if (priv->chip_id == M88RS6000_CHIP_ID)
fw_file = M88RS6000_FIRMWARE;
else
fw_file = M88DS3103_FIRMWARE;
/* request the firmware, this will block and timeout */
ret = request_firmware(&fw, fw_file, priv->i2c->dev.parent);
if (ret) {
dev_err(&priv->i2c->dev, "%s: firmare file '%s' not found\n",
KBUILD_MODNAME, fw_file);
goto err;
}
dev_info(&priv->i2c->dev, "%s: downloading firmware from file '%s'\n",
KBUILD_MODNAME, fw_file);
ret = m88ds3103_wr_reg(priv, 0xb2, 0x01);
if (ret)
goto error_fw_release;
for (remaining = fw->size; remaining > 0;
remaining -= (priv->cfg->i2c_wr_max - 1)) {
len = remaining;
if (len > (priv->cfg->i2c_wr_max - 1))
len = (priv->cfg->i2c_wr_max - 1);
ret = m88ds3103_wr_regs(priv, 0xb0,
&fw->data[fw->size - remaining], len);
if (ret) {
dev_err(&priv->i2c->dev,
"%s: firmware download failed=%d\n",
KBUILD_MODNAME, ret);
goto error_fw_release;
}
}
ret = m88ds3103_wr_reg(priv, 0xb2, 0x00);
if (ret)
goto error_fw_release;
release_firmware(fw);
fw = NULL;
ret = m88ds3103_rd_reg(priv, 0xb9, &u8tmp);
if (ret)
goto err;
if (!u8tmp) {
dev_info(&priv->i2c->dev, "%s: firmware did not run\n",
KBUILD_MODNAME);
ret = -EFAULT;
goto err;
}
dev_info(&priv->i2c->dev, "%s: found a '%s' in warm state\n",
KBUILD_MODNAME, m88ds3103_ops.info.name);
dev_info(&priv->i2c->dev, "%s: firmware version %X.%X\n",
KBUILD_MODNAME, (u8tmp >> 4) & 0xf, (u8tmp >> 0 & 0xf));
skip_fw_download:
/* warm state */
priv->warm = true;
return 0;
error_fw_release:
release_firmware(fw);
err:
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int m88ds3103_sleep(struct dvb_frontend *fe)
{
struct m88ds3103_priv *priv = fe->demodulator_priv;
int ret;
u8 u8tmp;
dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
priv->delivery_system = SYS_UNDEFINED;
/* TS Hi-Z */
if (priv->chip_id == M88RS6000_CHIP_ID)
u8tmp = 0x29;
else
u8tmp = 0x27;
ret = m88ds3103_wr_reg_mask(priv, u8tmp, 0x00, 0x01);
if (ret)
goto err;
/* sleep */
ret = m88ds3103_wr_reg_mask(priv, 0x08, 0x00, 0x01);
if (ret)
goto err;
ret = m88ds3103_wr_reg_mask(priv, 0x04, 0x01, 0x01);
if (ret)
goto err;
ret = m88ds3103_wr_reg_mask(priv, 0x23, 0x10, 0x10);
if (ret)
goto err;
return 0;
err:
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int m88ds3103_get_frontend(struct dvb_frontend *fe)
{
struct m88ds3103_priv *priv = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
u8 buf[3];
dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
if (!priv->warm || !(priv->fe_status & FE_HAS_LOCK)) {
ret = -EAGAIN;
goto err;
}
switch (c->delivery_system) {
case SYS_DVBS:
ret = m88ds3103_rd_reg(priv, 0xe0, &buf[0]);
if (ret)
goto err;
ret = m88ds3103_rd_reg(priv, 0xe6, &buf[1]);
if (ret)
goto err;
switch ((buf[0] >> 2) & 0x01) {
case 0:
c->inversion = INVERSION_OFF;
break;
case 1:
c->inversion = INVERSION_ON;
break;
}
switch ((buf[1] >> 5) & 0x07) {
case 0:
c->fec_inner = FEC_7_8;
break;
case 1:
c->fec_inner = FEC_5_6;
break;
case 2:
c->fec_inner = FEC_3_4;
break;
case 3:
c->fec_inner = FEC_2_3;
break;
case 4:
c->fec_inner = FEC_1_2;
break;
default:
dev_dbg(&priv->i2c->dev, "%s: invalid fec_inner\n",
__func__);
}
c->modulation = QPSK;
break;
case SYS_DVBS2:
ret = m88ds3103_rd_reg(priv, 0x7e, &buf[0]);
if (ret)
goto err;
ret = m88ds3103_rd_reg(priv, 0x89, &buf[1]);
if (ret)
goto err;
ret = m88ds3103_rd_reg(priv, 0xf2, &buf[2]);
if (ret)
goto err;
switch ((buf[0] >> 0) & 0x0f) {
case 2:
c->fec_inner = FEC_2_5;
break;
case 3:
c->fec_inner = FEC_1_2;
break;
case 4:
c->fec_inner = FEC_3_5;
break;
case 5:
c->fec_inner = FEC_2_3;
break;
case 6:
c->fec_inner = FEC_3_4;
break;
case 7:
c->fec_inner = FEC_4_5;
break;
case 8:
c->fec_inner = FEC_5_6;
break;
case 9:
c->fec_inner = FEC_8_9;
break;
case 10:
c->fec_inner = FEC_9_10;
break;
default:
dev_dbg(&priv->i2c->dev, "%s: invalid fec_inner\n",
__func__);
}
switch ((buf[0] >> 5) & 0x01) {
case 0:
c->pilot = PILOT_OFF;
break;
case 1:
c->pilot = PILOT_ON;
break;
}
switch ((buf[0] >> 6) & 0x07) {
case 0:
c->modulation = QPSK;
break;
case 1:
c->modulation = PSK_8;
break;
case 2:
c->modulation = APSK_16;
break;
case 3:
c->modulation = APSK_32;
break;
default:
dev_dbg(&priv->i2c->dev, "%s: invalid modulation\n",
__func__);
}
switch ((buf[1] >> 7) & 0x01) {
case 0:
c->inversion = INVERSION_OFF;
break;
case 1:
c->inversion = INVERSION_ON;
break;
}
switch ((buf[2] >> 0) & 0x03) {
case 0:
c->rolloff = ROLLOFF_35;
break;
case 1:
c->rolloff = ROLLOFF_25;
break;
case 2:
c->rolloff = ROLLOFF_20;
break;
default:
dev_dbg(&priv->i2c->dev, "%s: invalid rolloff\n",
__func__);
}
break;
default:
dev_dbg(&priv->i2c->dev, "%s: invalid delivery_system\n",
__func__);
ret = -EINVAL;
goto err;
}
ret = m88ds3103_rd_regs(priv, 0x6d, buf, 2);
if (ret)
goto err;
c->symbol_rate = 1ull * ((buf[1] << 8) | (buf[0] << 0)) *
priv->mclk_khz * 1000 / 0x10000;
return 0;
err:
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int m88ds3103_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct m88ds3103_priv *priv = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret, i, tmp;
u8 buf[3];
u16 noise, signal;
u32 noise_tot, signal_tot;
dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
/* reports SNR in resolution of 0.1 dB */
/* more iterations for more accurate estimation */
#define M88DS3103_SNR_ITERATIONS 3
switch (c->delivery_system) {
case SYS_DVBS:
tmp = 0;
for (i = 0; i < M88DS3103_SNR_ITERATIONS; i++) {
ret = m88ds3103_rd_reg(priv, 0xff, &buf[0]);
if (ret)
goto err;
tmp += buf[0];
}
/* use of one register limits max value to 15 dB */
/* SNR(X) dB = 10 * ln(X) / ln(10) dB */
tmp = DIV_ROUND_CLOSEST(tmp, 8 * M88DS3103_SNR_ITERATIONS);
if (tmp)
*snr = div_u64((u64) 100 * intlog2(tmp), intlog2(10));
else
*snr = 0;
break;
case SYS_DVBS2:
noise_tot = 0;
signal_tot = 0;
for (i = 0; i < M88DS3103_SNR_ITERATIONS; i++) {
ret = m88ds3103_rd_regs(priv, 0x8c, buf, 3);
if (ret)
goto err;
noise = buf[1] << 6; /* [13:6] */
noise |= buf[0] & 0x3f; /* [5:0] */
noise >>= 2;
signal = buf[2] * buf[2];
signal >>= 1;
noise_tot += noise;
signal_tot += signal;
}
noise = noise_tot / M88DS3103_SNR_ITERATIONS;
signal = signal_tot / M88DS3103_SNR_ITERATIONS;
/* SNR(X) dB = 10 * log10(X) dB */
if (signal > noise) {
tmp = signal / noise;
*snr = div_u64((u64) 100 * intlog10(tmp), (1 << 24));
} else {
*snr = 0;
}
break;
default:
dev_dbg(&priv->i2c->dev, "%s: invalid delivery_system\n",
__func__);
ret = -EINVAL;
goto err;
}
return 0;
err:
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
static int m88ds3103_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct m88ds3103_priv *priv = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
unsigned int utmp;
u8 buf[3], u8tmp;
dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
switch (c->delivery_system) {
case SYS_DVBS:
ret = m88ds3103_wr_reg(priv, 0xf9, 0x04);
if (ret)