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linux/drivers/media/dvb-frontends/rtl2832.c
Thomas Gleixner 1621633323 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 
Based on 2 normalized pattern(s):

  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

  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 [no]_[pad]_[ctrl] 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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 176 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190519154040.652910950@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21 11:28:39 +02:00

1151 lines
28 KiB
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Realtek RTL2832 DVB-T demodulator driver
*
* Copyright (C) 2012 Thomas Mair <thomas.mair86@gmail.com>
* Copyright (C) 2012-2014 Antti Palosaari <crope@iki.fi>
*/
#include "rtl2832_priv.h"
#define REG_MASK(b) (BIT(b + 1) - 1)
static const struct rtl2832_reg_entry registers[] = {
[DVBT_SOFT_RST] = {0x101, 2, 2},
[DVBT_IIC_REPEAT] = {0x101, 3, 3},
[DVBT_TR_WAIT_MIN_8K] = {0x188, 11, 2},
[DVBT_RSD_BER_FAIL_VAL] = {0x18f, 15, 0},
[DVBT_EN_BK_TRK] = {0x1a6, 7, 7},
[DVBT_AD_EN_REG] = {0x008, 7, 7},
[DVBT_AD_EN_REG1] = {0x008, 6, 6},
[DVBT_EN_BBIN] = {0x1b1, 0, 0},
[DVBT_MGD_THD0] = {0x195, 7, 0},
[DVBT_MGD_THD1] = {0x196, 7, 0},
[DVBT_MGD_THD2] = {0x197, 7, 0},
[DVBT_MGD_THD3] = {0x198, 7, 0},
[DVBT_MGD_THD4] = {0x199, 7, 0},
[DVBT_MGD_THD5] = {0x19a, 7, 0},
[DVBT_MGD_THD6] = {0x19b, 7, 0},
[DVBT_MGD_THD7] = {0x19c, 7, 0},
[DVBT_EN_CACQ_NOTCH] = {0x161, 4, 4},
[DVBT_AD_AV_REF] = {0x009, 6, 0},
[DVBT_REG_PI] = {0x00a, 2, 0},
[DVBT_PIP_ON] = {0x021, 3, 3},
[DVBT_SCALE1_B92] = {0x292, 7, 0},
[DVBT_SCALE1_B93] = {0x293, 7, 0},
[DVBT_SCALE1_BA7] = {0x2a7, 7, 0},
[DVBT_SCALE1_BA9] = {0x2a9, 7, 0},
[DVBT_SCALE1_BAA] = {0x2aa, 7, 0},
[DVBT_SCALE1_BAB] = {0x2ab, 7, 0},
[DVBT_SCALE1_BAC] = {0x2ac, 7, 0},
[DVBT_SCALE1_BB0] = {0x2b0, 7, 0},
[DVBT_SCALE1_BB1] = {0x2b1, 7, 0},
[DVBT_KB_P1] = {0x164, 3, 1},
[DVBT_KB_P2] = {0x164, 6, 4},
[DVBT_KB_P3] = {0x165, 2, 0},
[DVBT_OPT_ADC_IQ] = {0x006, 5, 4},
[DVBT_AD_AVI] = {0x009, 1, 0},
[DVBT_AD_AVQ] = {0x009, 3, 2},
[DVBT_K1_CR_STEP12] = {0x2ad, 9, 4},
[DVBT_TRK_KS_P2] = {0x16f, 2, 0},
[DVBT_TRK_KS_I2] = {0x170, 5, 3},
[DVBT_TR_THD_SET2] = {0x172, 3, 0},
[DVBT_TRK_KC_P2] = {0x173, 5, 3},
[DVBT_TRK_KC_I2] = {0x175, 2, 0},
[DVBT_CR_THD_SET2] = {0x176, 7, 6},
[DVBT_PSET_IFFREQ] = {0x119, 21, 0},
[DVBT_SPEC_INV] = {0x115, 0, 0},
[DVBT_RSAMP_RATIO] = {0x19f, 27, 2},
[DVBT_CFREQ_OFF_RATIO] = {0x19d, 23, 4},
[DVBT_FSM_STAGE] = {0x351, 6, 3},
[DVBT_RX_CONSTEL] = {0x33c, 3, 2},
[DVBT_RX_HIER] = {0x33c, 6, 4},
[DVBT_RX_C_RATE_LP] = {0x33d, 2, 0},
[DVBT_RX_C_RATE_HP] = {0x33d, 5, 3},
[DVBT_GI_IDX] = {0x351, 1, 0},
[DVBT_FFT_MODE_IDX] = {0x351, 2, 2},
[DVBT_RSD_BER_EST] = {0x34e, 15, 0},
[DVBT_CE_EST_EVM] = {0x40c, 15, 0},
[DVBT_RF_AGC_VAL] = {0x35b, 13, 0},
[DVBT_IF_AGC_VAL] = {0x359, 13, 0},
[DVBT_DAGC_VAL] = {0x305, 7, 0},
[DVBT_SFREQ_OFF] = {0x318, 13, 0},
[DVBT_CFREQ_OFF] = {0x35f, 17, 0},
[DVBT_POLAR_RF_AGC] = {0x00e, 1, 1},
[DVBT_POLAR_IF_AGC] = {0x00e, 0, 0},
[DVBT_AAGC_HOLD] = {0x104, 5, 5},
[DVBT_EN_RF_AGC] = {0x104, 6, 6},
[DVBT_EN_IF_AGC] = {0x104, 7, 7},
[DVBT_IF_AGC_MIN] = {0x108, 7, 0},
[DVBT_IF_AGC_MAX] = {0x109, 7, 0},
[DVBT_RF_AGC_MIN] = {0x10a, 7, 0},
[DVBT_RF_AGC_MAX] = {0x10b, 7, 0},
[DVBT_IF_AGC_MAN] = {0x10c, 6, 6},
[DVBT_IF_AGC_MAN_VAL] = {0x10c, 13, 0},
[DVBT_RF_AGC_MAN] = {0x10e, 6, 6},
[DVBT_RF_AGC_MAN_VAL] = {0x10e, 13, 0},
[DVBT_DAGC_TRG_VAL] = {0x112, 7, 0},
[DVBT_AGC_TARG_VAL_0] = {0x102, 0, 0},
[DVBT_AGC_TARG_VAL_8_1] = {0x103, 7, 0},
[DVBT_AAGC_LOOP_GAIN] = {0x1c7, 5, 1},
[DVBT_LOOP_GAIN2_3_0] = {0x104, 4, 1},
[DVBT_LOOP_GAIN2_4] = {0x105, 7, 7},
[DVBT_LOOP_GAIN3] = {0x1c8, 4, 0},
[DVBT_VTOP1] = {0x106, 5, 0},
[DVBT_VTOP2] = {0x1c9, 5, 0},
[DVBT_VTOP3] = {0x1ca, 5, 0},
[DVBT_KRF1] = {0x1cb, 7, 0},
[DVBT_KRF2] = {0x107, 7, 0},
[DVBT_KRF3] = {0x1cd, 7, 0},
[DVBT_KRF4] = {0x1ce, 7, 0},
[DVBT_EN_GI_PGA] = {0x1e5, 0, 0},
[DVBT_THD_LOCK_UP] = {0x1d9, 8, 0},
[DVBT_THD_LOCK_DW] = {0x1db, 8, 0},
[DVBT_THD_UP1] = {0x1dd, 7, 0},
[DVBT_THD_DW1] = {0x1de, 7, 0},
[DVBT_INTER_CNT_LEN] = {0x1d8, 3, 0},
[DVBT_GI_PGA_STATE] = {0x1e6, 3, 3},
[DVBT_EN_AGC_PGA] = {0x1d7, 0, 0},
[DVBT_CKOUTPAR] = {0x17b, 5, 5},
[DVBT_CKOUT_PWR] = {0x17b, 6, 6},
[DVBT_SYNC_DUR] = {0x17b, 7, 7},
[DVBT_ERR_DUR] = {0x17c, 0, 0},
[DVBT_SYNC_LVL] = {0x17c, 1, 1},
[DVBT_ERR_LVL] = {0x17c, 2, 2},
[DVBT_VAL_LVL] = {0x17c, 3, 3},
[DVBT_SERIAL] = {0x17c, 4, 4},
[DVBT_SER_LSB] = {0x17c, 5, 5},
[DVBT_CDIV_PH0] = {0x17d, 3, 0},
[DVBT_CDIV_PH1] = {0x17d, 7, 4},
[DVBT_MPEG_IO_OPT_2_2] = {0x006, 7, 7},
[DVBT_MPEG_IO_OPT_1_0] = {0x007, 7, 6},
[DVBT_CKOUTPAR_PIP] = {0x0b7, 4, 4},
[DVBT_CKOUT_PWR_PIP] = {0x0b7, 3, 3},
[DVBT_SYNC_LVL_PIP] = {0x0b7, 2, 2},
[DVBT_ERR_LVL_PIP] = {0x0b7, 1, 1},
[DVBT_VAL_LVL_PIP] = {0x0b7, 0, 0},
[DVBT_CKOUTPAR_PID] = {0x0b9, 4, 4},
[DVBT_CKOUT_PWR_PID] = {0x0b9, 3, 3},
[DVBT_SYNC_LVL_PID] = {0x0b9, 2, 2},
[DVBT_ERR_LVL_PID] = {0x0b9, 1, 1},
[DVBT_VAL_LVL_PID] = {0x0b9, 0, 0},
[DVBT_SM_PASS] = {0x193, 11, 0},
[DVBT_AD7_SETTING] = {0x011, 15, 0},
[DVBT_RSSI_R] = {0x301, 6, 0},
[DVBT_ACI_DET_IND] = {0x312, 0, 0},
[DVBT_REG_MON] = {0x00d, 1, 0},
[DVBT_REG_MONSEL] = {0x00d, 2, 2},
[DVBT_REG_GPE] = {0x00d, 7, 7},
[DVBT_REG_GPO] = {0x010, 0, 0},
[DVBT_REG_4MSEL] = {0x013, 0, 0},
};
static int rtl2832_rd_demod_reg(struct rtl2832_dev *dev, int reg, u32 *val)
{
struct i2c_client *client = dev->client;
int ret, i;
u16 reg_start_addr;
u8 msb, lsb, reading[4], len;
u32 reading_tmp, mask;
reg_start_addr = registers[reg].start_address;
msb = registers[reg].msb;
lsb = registers[reg].lsb;
len = (msb >> 3) + 1;
mask = REG_MASK(msb - lsb);
ret = regmap_bulk_read(dev->regmap, reg_start_addr, reading, len);
if (ret)
goto err;
reading_tmp = 0;
for (i = 0; i < len; i++)
reading_tmp |= reading[i] << ((len - 1 - i) * 8);
*val = (reading_tmp >> lsb) & mask;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_wr_demod_reg(struct rtl2832_dev *dev, int reg, u32 val)
{
struct i2c_client *client = dev->client;
int ret, i;
u16 reg_start_addr;
u8 msb, lsb, reading[4], writing[4], len;
u32 reading_tmp, writing_tmp, mask;
reg_start_addr = registers[reg].start_address;
msb = registers[reg].msb;
lsb = registers[reg].lsb;
len = (msb >> 3) + 1;
mask = REG_MASK(msb - lsb);
ret = regmap_bulk_read(dev->regmap, reg_start_addr, reading, len);
if (ret)
goto err;
reading_tmp = 0;
for (i = 0; i < len; i++)
reading_tmp |= reading[i] << ((len - 1 - i) * 8);
writing_tmp = reading_tmp & ~(mask << lsb);
writing_tmp |= ((val & mask) << lsb);
for (i = 0; i < len; i++)
writing[i] = (writing_tmp >> ((len - 1 - i) * 8)) & 0xff;
ret = regmap_bulk_write(dev->regmap, reg_start_addr, writing, len);
if (ret)
goto err;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_set_if(struct dvb_frontend *fe, u32 if_freq)
{
struct rtl2832_dev *dev = fe->demodulator_priv;
struct i2c_client *client = dev->client;
int ret;
u64 pset_iffreq;
u8 en_bbin = (if_freq == 0 ? 0x1 : 0x0);
/*
* PSET_IFFREQ = - floor((IfFreqHz % CrystalFreqHz) * pow(2, 22)
* / CrystalFreqHz)
*/
pset_iffreq = if_freq % dev->pdata->clk;
pset_iffreq *= 0x400000;
pset_iffreq = div_u64(pset_iffreq, dev->pdata->clk);
pset_iffreq = -pset_iffreq;
pset_iffreq = pset_iffreq & 0x3fffff;
dev_dbg(&client->dev, "if_frequency=%d pset_iffreq=%08x\n",
if_freq, (unsigned)pset_iffreq);
ret = rtl2832_wr_demod_reg(dev, DVBT_EN_BBIN, en_bbin);
if (ret)
goto err;
ret = rtl2832_wr_demod_reg(dev, DVBT_PSET_IFFREQ, pset_iffreq);
if (ret)
goto err;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_init(struct dvb_frontend *fe)
{
struct rtl2832_dev *dev = fe->demodulator_priv;
struct i2c_client *client = dev->client;
struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
const struct rtl2832_reg_value *init;
int i, ret, len;
/* initialization values for the demodulator registers */
struct rtl2832_reg_value rtl2832_initial_regs[] = {
{DVBT_AD_EN_REG, 0x1},
{DVBT_AD_EN_REG1, 0x1},
{DVBT_RSD_BER_FAIL_VAL, 0x2800},
{DVBT_MGD_THD0, 0x10},
{DVBT_MGD_THD1, 0x20},
{DVBT_MGD_THD2, 0x20},
{DVBT_MGD_THD3, 0x40},
{DVBT_MGD_THD4, 0x22},
{DVBT_MGD_THD5, 0x32},
{DVBT_MGD_THD6, 0x37},
{DVBT_MGD_THD7, 0x39},
{DVBT_EN_BK_TRK, 0x0},
{DVBT_EN_CACQ_NOTCH, 0x0},
{DVBT_AD_AV_REF, 0x2a},
{DVBT_REG_PI, 0x6},
{DVBT_PIP_ON, 0x0},
{DVBT_CDIV_PH0, 0x8},
{DVBT_CDIV_PH1, 0x8},
{DVBT_SCALE1_B92, 0x4},
{DVBT_SCALE1_B93, 0xb0},
{DVBT_SCALE1_BA7, 0x78},
{DVBT_SCALE1_BA9, 0x28},
{DVBT_SCALE1_BAA, 0x59},
{DVBT_SCALE1_BAB, 0x83},
{DVBT_SCALE1_BAC, 0xd4},
{DVBT_SCALE1_BB0, 0x65},
{DVBT_SCALE1_BB1, 0x43},
{DVBT_KB_P1, 0x1},
{DVBT_KB_P2, 0x4},
{DVBT_KB_P3, 0x7},
{DVBT_K1_CR_STEP12, 0xa},
{DVBT_REG_GPE, 0x1},
{DVBT_SERIAL, 0x0},
{DVBT_CDIV_PH0, 0x9},
{DVBT_CDIV_PH1, 0x9},
{DVBT_MPEG_IO_OPT_2_2, 0x0},
{DVBT_MPEG_IO_OPT_1_0, 0x0},
{DVBT_TRK_KS_P2, 0x4},
{DVBT_TRK_KS_I2, 0x7},
{DVBT_TR_THD_SET2, 0x6},
{DVBT_TRK_KC_I2, 0x5},
{DVBT_CR_THD_SET2, 0x1},
};
dev_dbg(&client->dev, "\n");
ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x0);
if (ret)
goto err;
for (i = 0; i < ARRAY_SIZE(rtl2832_initial_regs); i++) {
ret = rtl2832_wr_demod_reg(dev, rtl2832_initial_regs[i].reg,
rtl2832_initial_regs[i].value);
if (ret)
goto err;
}
/* load tuner specific settings */
dev_dbg(&client->dev, "load settings for tuner=%02x\n",
dev->pdata->tuner);
switch (dev->pdata->tuner) {
case RTL2832_TUNER_FC2580:
len = ARRAY_SIZE(rtl2832_tuner_init_fc2580);
init = rtl2832_tuner_init_fc2580;
break;
case RTL2832_TUNER_FC0012:
case RTL2832_TUNER_FC0013:
len = ARRAY_SIZE(rtl2832_tuner_init_fc0012);
init = rtl2832_tuner_init_fc0012;
break;
case RTL2832_TUNER_TUA9001:
len = ARRAY_SIZE(rtl2832_tuner_init_tua9001);
init = rtl2832_tuner_init_tua9001;
break;
case RTL2832_TUNER_E4000:
len = ARRAY_SIZE(rtl2832_tuner_init_e4000);
init = rtl2832_tuner_init_e4000;
break;
case RTL2832_TUNER_R820T:
case RTL2832_TUNER_R828D:
len = ARRAY_SIZE(rtl2832_tuner_init_r820t);
init = rtl2832_tuner_init_r820t;
break;
case RTL2832_TUNER_SI2157:
len = ARRAY_SIZE(rtl2832_tuner_init_si2157);
init = rtl2832_tuner_init_si2157;
break;
default:
ret = -EINVAL;
goto err;
}
for (i = 0; i < len; i++) {
ret = rtl2832_wr_demod_reg(dev, init[i].reg, init[i].value);
if (ret)
goto err;
}
/* init stats here in order signal app which stats are supported */
c->strength.len = 1;
c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
c->cnr.len = 1;
c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
c->post_bit_error.len = 1;
c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
c->post_bit_count.len = 1;
c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
dev->sleeping = false;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_sleep(struct dvb_frontend *fe)
{
struct rtl2832_dev *dev = fe->demodulator_priv;
struct i2c_client *client = dev->client;
int ret;
dev_dbg(&client->dev, "\n");
dev->sleeping = true;
dev->fe_status = 0;
ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x1);
if (ret)
goto err;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *s)
{
struct rtl2832_dev *dev = fe->demodulator_priv;
struct i2c_client *client = dev->client;
dev_dbg(&client->dev, "\n");
s->min_delay_ms = 1000;
s->step_size = fe->ops.info.frequency_stepsize_hz * 2;
s->max_drift = (fe->ops.info.frequency_stepsize_hz * 2) + 1;
return 0;
}
static int rtl2832_set_frontend(struct dvb_frontend *fe)
{
struct rtl2832_dev *dev = fe->demodulator_priv;
struct i2c_client *client = dev->client;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret, i, j;
u64 bw_mode, num, num2;
u32 resamp_ratio, cfreq_off_ratio;
static u8 bw_params[3][32] = {
/* 6 MHz bandwidth */
{
0xf5, 0xff, 0x15, 0x38, 0x5d, 0x6d, 0x52, 0x07, 0xfa, 0x2f,
0x53, 0xf5, 0x3f, 0xca, 0x0b, 0x91, 0xea, 0x30, 0x63, 0xb2,
0x13, 0xda, 0x0b, 0xc4, 0x18, 0x7e, 0x16, 0x66, 0x08, 0x67,
0x19, 0xe0,
},
/* 7 MHz bandwidth */
{
0xe7, 0xcc, 0xb5, 0xba, 0xe8, 0x2f, 0x67, 0x61, 0x00, 0xaf,
0x86, 0xf2, 0xbf, 0x59, 0x04, 0x11, 0xb6, 0x33, 0xa4, 0x30,
0x15, 0x10, 0x0a, 0x42, 0x18, 0xf8, 0x17, 0xd9, 0x07, 0x22,
0x19, 0x10,
},
/* 8 MHz bandwidth */
{
0x09, 0xf6, 0xd2, 0xa7, 0x9a, 0xc9, 0x27, 0x77, 0x06, 0xbf,
0xec, 0xf4, 0x4f, 0x0b, 0xfc, 0x01, 0x63, 0x35, 0x54, 0xa7,
0x16, 0x66, 0x08, 0xb4, 0x19, 0x6e, 0x19, 0x65, 0x05, 0xc8,
0x19, 0xe0,
},
};
dev_dbg(&client->dev, "frequency=%u bandwidth_hz=%u inversion=%u\n",
c->frequency, c->bandwidth_hz, c->inversion);
/* program tuner */
if (fe->ops.tuner_ops.set_params)
fe->ops.tuner_ops.set_params(fe);
/* If the frontend has get_if_frequency(), use it */
if (fe->ops.tuner_ops.get_if_frequency) {
u32 if_freq;
ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
if (ret)
goto err;
ret = rtl2832_set_if(fe, if_freq);
if (ret)
goto err;
}
switch (c->bandwidth_hz) {
case 6000000:
i = 0;
bw_mode = 48000000;
break;
case 7000000:
i = 1;
bw_mode = 56000000;
break;
case 8000000:
i = 2;
bw_mode = 64000000;
break;
default:
dev_err(&client->dev, "invalid bandwidth_hz %u\n",
c->bandwidth_hz);
ret = -EINVAL;
goto err;
}
for (j = 0; j < sizeof(bw_params[0]); j++) {
ret = regmap_bulk_write(dev->regmap,
0x11c + j, &bw_params[i][j], 1);
if (ret)
goto err;
}
/* calculate and set resample ratio
* RSAMP_RATIO = floor(CrystalFreqHz * 7 * pow(2, 22)
* / ConstWithBandwidthMode)
*/
num = dev->pdata->clk * 7ULL;
num *= 0x400000;
num = div_u64(num, bw_mode);
resamp_ratio = num & 0x3ffffff;
ret = rtl2832_wr_demod_reg(dev, DVBT_RSAMP_RATIO, resamp_ratio);
if (ret)
goto err;
/* calculate and set cfreq off ratio
* CFREQ_OFF_RATIO = - floor(ConstWithBandwidthMode * pow(2, 20)
* / (CrystalFreqHz * 7))
*/
num = bw_mode << 20;
num2 = dev->pdata->clk * 7ULL;
num = div_u64(num, num2);
num = -num;
cfreq_off_ratio = num & 0xfffff;
ret = rtl2832_wr_demod_reg(dev, DVBT_CFREQ_OFF_RATIO, cfreq_off_ratio);
if (ret)
goto err;
/* soft reset */
ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x1);
if (ret)
goto err;
ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x0);
if (ret)
goto err;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_get_frontend(struct dvb_frontend *fe,
struct dtv_frontend_properties *c)
{
struct rtl2832_dev *dev = fe->demodulator_priv;
struct i2c_client *client = dev->client;
int ret;
u8 buf[3];
if (dev->sleeping)
return 0;
ret = regmap_bulk_read(dev->regmap, 0x33c, buf, 2);
if (ret)
goto err;
ret = regmap_bulk_read(dev->regmap, 0x351, &buf[2], 1);
if (ret)
goto err;
dev_dbg(&client->dev, "TPS=%*ph\n", 3, buf);
switch ((buf[0] >> 2) & 3) {
case 0:
c->modulation = QPSK;
break;
case 1:
c->modulation = QAM_16;
break;
case 2:
c->modulation = QAM_64;
break;
}
switch ((buf[2] >> 2) & 1) {
case 0:
c->transmission_mode = TRANSMISSION_MODE_2K;
break;
case 1:
c->transmission_mode = TRANSMISSION_MODE_8K;
}
switch ((buf[2] >> 0) & 3) {
case 0:
c->guard_interval = GUARD_INTERVAL_1_32;
break;
case 1:
c->guard_interval = GUARD_INTERVAL_1_16;
break;
case 2:
c->guard_interval = GUARD_INTERVAL_1_8;
break;
case 3:
c->guard_interval = GUARD_INTERVAL_1_4;
break;
}
switch ((buf[0] >> 4) & 7) {
case 0:
c->hierarchy = HIERARCHY_NONE;
break;
case 1:
c->hierarchy = HIERARCHY_1;
break;
case 2:
c->hierarchy = HIERARCHY_2;
break;
case 3:
c->hierarchy = HIERARCHY_4;
break;
}
switch ((buf[1] >> 3) & 7) {
case 0:
c->code_rate_HP = FEC_1_2;
break;
case 1:
c->code_rate_HP = FEC_2_3;
break;
case 2:
c->code_rate_HP = FEC_3_4;
break;
case 3:
c->code_rate_HP = FEC_5_6;
break;
case 4:
c->code_rate_HP = FEC_7_8;
break;
}
switch ((buf[1] >> 0) & 7) {
case 0:
c->code_rate_LP = FEC_1_2;
break;
case 1:
c->code_rate_LP = FEC_2_3;
break;
case 2:
c->code_rate_LP = FEC_3_4;
break;
case 3:
c->code_rate_LP = FEC_5_6;
break;
case 4:
c->code_rate_LP = FEC_7_8;
break;
}
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
struct rtl2832_dev *dev = fe->demodulator_priv;
struct i2c_client *client = dev->client;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
u32 uninitialized_var(tmp);
u8 u8tmp, buf[2];
u16 u16tmp;
dev_dbg(&client->dev, "\n");
*status = 0;
if (dev->sleeping)
return 0;
ret = rtl2832_rd_demod_reg(dev, DVBT_FSM_STAGE, &tmp);
if (ret)
goto err;
if (tmp == 11) {
*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
} else if (tmp == 10) {
*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
FE_HAS_VITERBI;
}
dev->fe_status = *status;
/* signal strength */
if (dev->fe_status & FE_HAS_SIGNAL) {
/* read digital AGC */
ret = regmap_bulk_read(dev->regmap, 0x305, &u8tmp, 1);
if (ret)
goto err;
dev_dbg(&client->dev, "digital agc=%02x", u8tmp);
u8tmp = ~u8tmp;
u16tmp = u8tmp << 8 | u8tmp << 0;
c->strength.stat[0].scale = FE_SCALE_RELATIVE;
c->strength.stat[0].uvalue = u16tmp;
} else {
c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
}
/* CNR */
if (dev->fe_status & FE_HAS_VITERBI) {
unsigned hierarchy, constellation;
#define CONSTELLATION_NUM 3
#define HIERARCHY_NUM 4
static const u32 constant[CONSTELLATION_NUM][HIERARCHY_NUM] = {
{85387325, 85387325, 85387325, 85387325},
{86676178, 86676178, 87167949, 87795660},
{87659938, 87659938, 87885178, 88241743},
};
ret = regmap_bulk_read(dev->regmap, 0x33c, &u8tmp, 1);
if (ret)
goto err;
constellation = (u8tmp >> 2) & 0x03; /* [3:2] */
if (constellation > CONSTELLATION_NUM - 1)
goto err;
hierarchy = (u8tmp >> 4) & 0x07; /* [6:4] */
if (hierarchy > HIERARCHY_NUM - 1)
goto err;
ret = regmap_bulk_read(dev->regmap, 0x40c, buf, 2);
if (ret)
goto err;
u16tmp = buf[0] << 8 | buf[1] << 0;
if (u16tmp)
tmp = (constant[constellation][hierarchy] -
intlog10(u16tmp)) / ((1 << 24) / 10000);
else
tmp = 0;
dev_dbg(&client->dev, "cnr raw=%u\n", u16tmp);
c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
c->cnr.stat[0].svalue = tmp;
} else {
c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
}
/* BER */
if (dev->fe_status & FE_HAS_LOCK) {
ret = regmap_bulk_read(dev->regmap, 0x34e, buf, 2);
if (ret)
goto err;
u16tmp = buf[0] << 8 | buf[1] << 0;
dev->post_bit_error += u16tmp;
dev->post_bit_count += 1000000;
dev_dbg(&client->dev, "ber errors=%u total=1000000\n", u16tmp);
c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
c->post_bit_error.stat[0].uvalue = dev->post_bit_error;
c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
c->post_bit_count.stat[0].uvalue = dev->post_bit_count;
} else {
c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
}
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
/* report SNR in resolution of 0.1 dB */
if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL)
*snr = div_s64(c->cnr.stat[0].svalue, 100);
else
*snr = 0;
return 0;
}
static int rtl2832_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct rtl2832_dev *dev = fe->demodulator_priv;
*ber = (dev->post_bit_error - dev->post_bit_error_prev);
dev->post_bit_error_prev = dev->post_bit_error;
return 0;
}
/*
* I2C gate/mux/repeater logic
* There is delay mechanism to avoid unneeded I2C gate open / close. Gate close
* is delayed here a little bit in order to see if there is sequence of I2C
* messages sent to same I2C bus.
*/
static void rtl2832_i2c_gate_work(struct work_struct *work)
{
struct rtl2832_dev *dev = container_of(work, struct rtl2832_dev, i2c_gate_work.work);
struct i2c_client *client = dev->client;
int ret;
/* close gate */
ret = regmap_update_bits(dev->regmap, 0x101, 0x08, 0x00);
if (ret)
goto err;
return;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
}
static int rtl2832_select(struct i2c_mux_core *muxc, u32 chan_id)
{
struct rtl2832_dev *dev = i2c_mux_priv(muxc);
struct i2c_client *client = dev->client;
int ret;
/* terminate possible gate closing */
cancel_delayed_work(&dev->i2c_gate_work);
/* open gate */
ret = regmap_update_bits(dev->regmap, 0x101, 0x08, 0x08);
if (ret)
goto err;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_deselect(struct i2c_mux_core *muxc, u32 chan_id)
{
struct rtl2832_dev *dev = i2c_mux_priv(muxc);
schedule_delayed_work(&dev->i2c_gate_work, usecs_to_jiffies(100));
return 0;
}
static const struct dvb_frontend_ops rtl2832_ops = {
.delsys = { SYS_DVBT },
.info = {
.name = "Realtek RTL2832 (DVB-T)",
.frequency_min_hz = 174 * MHz,
.frequency_max_hz = 862 * MHz,
.frequency_stepsize_hz = 166667,
.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_RECOVER |
FE_CAN_MUTE_TS
},
.init = rtl2832_init,
.sleep = rtl2832_sleep,
.get_tune_settings = rtl2832_get_tune_settings,
.set_frontend = rtl2832_set_frontend,
.get_frontend = rtl2832_get_frontend,
.read_status = rtl2832_read_status,
.read_snr = rtl2832_read_snr,
.read_ber = rtl2832_read_ber,
};
static bool rtl2832_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case 0x305:
case 0x33c:
case 0x34e:
case 0x351:
case 0x40c ... 0x40d:
return true;
default:
break;
}
return false;
}
static struct dvb_frontend *rtl2832_get_dvb_frontend(struct i2c_client *client)
{
struct rtl2832_dev *dev = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
return &dev->fe;
}
static struct i2c_adapter *rtl2832_get_i2c_adapter(struct i2c_client *client)
{
struct rtl2832_dev *dev = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
return dev->muxc->adapter[0];
}
static int rtl2832_slave_ts_ctrl(struct i2c_client *client, bool enable)
{
struct rtl2832_dev *dev = i2c_get_clientdata(client);
int ret;
dev_dbg(&client->dev, "enable=%d\n", enable);
if (enable) {
ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x0);
if (ret)
goto err;
ret = regmap_bulk_write(dev->regmap, 0x10c, "\x5f\xff", 2);
if (ret)
goto err;
ret = rtl2832_wr_demod_reg(dev, DVBT_PIP_ON, 0x1);
if (ret)
goto err;
ret = regmap_bulk_write(dev->regmap, 0x0bc, "\x18", 1);
if (ret)
goto err;
ret = regmap_bulk_write(dev->regmap, 0x192, "\x7f\xf7\xff", 3);
if (ret)
goto err;
} else {
ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\x0f\xff", 3);
if (ret)
goto err;
ret = regmap_bulk_write(dev->regmap, 0x0bc, "\x08", 1);
if (ret)
goto err;
ret = rtl2832_wr_demod_reg(dev, DVBT_PIP_ON, 0x0);
if (ret)
goto err;
ret = regmap_bulk_write(dev->regmap, 0x10c, "\x00\x00", 2);
if (ret)
goto err;
ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x1);
if (ret)
goto err;
}
dev->slave_ts = enable;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_pid_filter_ctrl(struct dvb_frontend *fe, int onoff)
{
struct rtl2832_dev *dev = fe->demodulator_priv;
struct i2c_client *client = dev->client;
int ret;
u8 u8tmp;
dev_dbg(&client->dev, "onoff=%d, slave_ts=%d\n", onoff, dev->slave_ts);
/* enable / disable PID filter */
if (onoff)
u8tmp = 0x80;
else
u8tmp = 0x00;
if (dev->slave_ts)
ret = regmap_update_bits(dev->regmap, 0x021, 0xc0, u8tmp);
else
ret = regmap_update_bits(dev->regmap, 0x061, 0xc0, u8tmp);
if (ret)
goto err;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_pid_filter(struct dvb_frontend *fe, u8 index, u16 pid,
int onoff)
{
struct rtl2832_dev *dev = fe->demodulator_priv;
struct i2c_client *client = dev->client;
int ret;
u8 buf[4];
dev_dbg(&client->dev, "index=%d pid=%04x onoff=%d slave_ts=%d\n",
index, pid, onoff, dev->slave_ts);
/* skip invalid PIDs (0x2000) */
if (pid > 0x1fff || index > 32)
return 0;
if (onoff)
set_bit(index, &dev->filters);
else
clear_bit(index, &dev->filters);
/* enable / disable PIDs */
buf[0] = (dev->filters >> 0) & 0xff;
buf[1] = (dev->filters >> 8) & 0xff;
buf[2] = (dev->filters >> 16) & 0xff;
buf[3] = (dev->filters >> 24) & 0xff;
if (dev->slave_ts)
ret = regmap_bulk_write(dev->regmap, 0x022, buf, 4);
else
ret = regmap_bulk_write(dev->regmap, 0x062, buf, 4);
if (ret)
goto err;
/* add PID */
buf[0] = (pid >> 8) & 0xff;
buf[1] = (pid >> 0) & 0xff;
if (dev->slave_ts)
ret = regmap_bulk_write(dev->regmap, 0x026 + 2 * index, buf, 2);
else
ret = regmap_bulk_write(dev->regmap, 0x066 + 2 * index, buf, 2);
if (ret)
goto err;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct rtl2832_platform_data *pdata = client->dev.platform_data;
struct i2c_adapter *i2c = client->adapter;
struct rtl2832_dev *dev;
int ret;
u8 tmp;
static const struct regmap_range_cfg regmap_range_cfg[] = {
{
.selector_reg = 0x00,
.selector_mask = 0xff,
.selector_shift = 0,
.window_start = 0,
.window_len = 0x100,
.range_min = 0 * 0x100,
.range_max = 5 * 0x100,
},
};
dev_dbg(&client->dev, "\n");
/* allocate memory for the internal state */
dev = kzalloc(sizeof(struct rtl2832_dev), GFP_KERNEL);
if (dev == NULL) {
ret = -ENOMEM;
goto err;
}
/* setup the state */
i2c_set_clientdata(client, dev);
dev->client = client;
dev->pdata = client->dev.platform_data;
dev->sleeping = true;
INIT_DELAYED_WORK(&dev->i2c_gate_work, rtl2832_i2c_gate_work);
/* create regmap */
dev->regmap_config.reg_bits = 8,
dev->regmap_config.val_bits = 8,
dev->regmap_config.volatile_reg = rtl2832_volatile_reg,
dev->regmap_config.max_register = 5 * 0x100,
dev->regmap_config.ranges = regmap_range_cfg,
dev->regmap_config.num_ranges = ARRAY_SIZE(regmap_range_cfg),
dev->regmap_config.cache_type = REGCACHE_NONE,
dev->regmap = regmap_init_i2c(client, &dev->regmap_config);
if (IS_ERR(dev->regmap)) {
ret = PTR_ERR(dev->regmap);
goto err_kfree;
}
/* check if the demod is there */
ret = regmap_bulk_read(dev->regmap, 0x000, &tmp, 1);
if (ret)
goto err_regmap_exit;
/* create muxed i2c adapter for demod tuner bus */
dev->muxc = i2c_mux_alloc(i2c, &i2c->dev, 1, 0, I2C_MUX_LOCKED,
rtl2832_select, rtl2832_deselect);
if (!dev->muxc) {
ret = -ENOMEM;
goto err_regmap_exit;
}
dev->muxc->priv = dev;
ret = i2c_mux_add_adapter(dev->muxc, 0, 0, 0);
if (ret)
goto err_regmap_exit;
/* create dvb_frontend */
memcpy(&dev->fe.ops, &rtl2832_ops, sizeof(struct dvb_frontend_ops));
dev->fe.demodulator_priv = dev;
/* setup callbacks */
pdata->get_dvb_frontend = rtl2832_get_dvb_frontend;
pdata->get_i2c_adapter = rtl2832_get_i2c_adapter;
pdata->slave_ts_ctrl = rtl2832_slave_ts_ctrl;
pdata->pid_filter = rtl2832_pid_filter;
pdata->pid_filter_ctrl = rtl2832_pid_filter_ctrl;
pdata->regmap = dev->regmap;
dev_info(&client->dev, "Realtek RTL2832 successfully attached\n");
return 0;
err_regmap_exit:
regmap_exit(dev->regmap);
err_kfree:
kfree(dev);
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2832_remove(struct i2c_client *client)
{
struct rtl2832_dev *dev = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
cancel_delayed_work_sync(&dev->i2c_gate_work);
i2c_mux_del_adapters(dev->muxc);
regmap_exit(dev->regmap);
kfree(dev);
return 0;
}
static const struct i2c_device_id rtl2832_id_table[] = {
{"rtl2832", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, rtl2832_id_table);
static struct i2c_driver rtl2832_driver = {
.driver = {
.name = "rtl2832",
.suppress_bind_attrs = true,
},
.probe = rtl2832_probe,
.remove = rtl2832_remove,
.id_table = rtl2832_id_table,
};
module_i2c_driver(rtl2832_driver);
MODULE_AUTHOR("Thomas Mair <mair.thomas86@gmail.com>");
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Realtek RTL2832 DVB-T demodulator driver");
MODULE_LICENSE("GPL");
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