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linux_dsm_epyc7002/drivers/media/dvb-frontends/mb86a20s.c
Mauro Carvalho Chehab 75564e3a50 media: mb86a20s: make the bit rate estimation function more generic 
While 99% of the implementation of the bitrate estimation
routine for ISDB-T is generic, the current approach mangles it
with some mb86a20s-specific thing.

Split the calculus from the specific stuff, in order to make
easier to use the same approach on other drivers requiring
a similar formula.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sean Young <sean@mess.org>
2019-10-16 12:24:03 -03:00

2116 lines
52 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Fujitu mb86a20s ISDB-T/ISDB-Tsb Module driver
*
* Copyright (C) 2010-2013 Mauro Carvalho Chehab
* Copyright (C) 2009-2010 Douglas Landgraf <dougsland@redhat.com>
*/
#include <linux/kernel.h>
#include <asm/div64.h>
#include <media/dvb_frontend.h>
#include "mb86a20s.h"
#define NUM_LAYERS 3
enum mb86a20s_bandwidth {
MB86A20S_13SEG = 0,
MB86A20S_13SEG_PARTIAL = 1,
MB86A20S_1SEG = 2,
MB86A20S_3SEG = 3,
};
static u8 mb86a20s_subchannel[] = {
0xb0, 0xc0, 0xd0, 0xe0,
0xf0, 0x00, 0x10, 0x20,
};
struct mb86a20s_state {
struct i2c_adapter *i2c;
const struct mb86a20s_config *config;
u32 last_frequency;
struct dvb_frontend frontend;
u32 if_freq;
enum mb86a20s_bandwidth bw;
bool inversion;
u32 subchannel;
u32 estimated_rate[NUM_LAYERS];
unsigned long get_strength_time;
bool need_init;
};
struct regdata {
u8 reg;
u8 data;
};
#define BER_SAMPLING_RATE 1 /* Seconds */
/*
* Initialization sequence: Use whatevere default values that PV SBTVD
* does on its initialisation, obtained via USB snoop
*/
static struct regdata mb86a20s_init1[] = {
{ 0x70, 0x0f },
{ 0x70, 0xff },
{ 0x08, 0x01 },
{ 0x50, 0xd1 }, { 0x51, 0x20 },
};
static struct regdata mb86a20s_init2[] = {
{ 0x50, 0xd1 }, { 0x51, 0x22 },
{ 0x39, 0x01 },
{ 0x71, 0x00 },
{ 0x3b, 0x21 },
{ 0x3c, 0x3a },
{ 0x01, 0x0d },
{ 0x04, 0x08 }, { 0x05, 0x05 },
{ 0x04, 0x0e }, { 0x05, 0x00 },
{ 0x04, 0x0f }, { 0x05, 0x14 },
{ 0x04, 0x0b }, { 0x05, 0x8c },
{ 0x04, 0x00 }, { 0x05, 0x00 },
{ 0x04, 0x01 }, { 0x05, 0x07 },
{ 0x04, 0x02 }, { 0x05, 0x0f },
{ 0x04, 0x03 }, { 0x05, 0xa0 },
{ 0x04, 0x09 }, { 0x05, 0x00 },
{ 0x04, 0x0a }, { 0x05, 0xff },
{ 0x04, 0x27 }, { 0x05, 0x64 },
{ 0x04, 0x28 }, { 0x05, 0x00 },
{ 0x04, 0x1e }, { 0x05, 0xff },
{ 0x04, 0x29 }, { 0x05, 0x0a },
{ 0x04, 0x32 }, { 0x05, 0x0a },
{ 0x04, 0x14 }, { 0x05, 0x02 },
{ 0x04, 0x04 }, { 0x05, 0x00 },
{ 0x04, 0x05 }, { 0x05, 0x22 },
{ 0x04, 0x06 }, { 0x05, 0x0e },
{ 0x04, 0x07 }, { 0x05, 0xd8 },
{ 0x04, 0x12 }, { 0x05, 0x00 },
{ 0x04, 0x13 }, { 0x05, 0xff },
/*
* On this demod, when the bit count reaches the count below,
* it collects the bit error count. The bit counters are initialized
* to 65535 here. This warrants that all of them will be quickly
* calculated when device gets locked. As TMCC is parsed, the values
* will be adjusted later in the driver's code.
*/
{ 0x52, 0x01 }, /* Turn on BER before Viterbi */
{ 0x50, 0xa7 }, { 0x51, 0x00 },
{ 0x50, 0xa8 }, { 0x51, 0xff },
{ 0x50, 0xa9 }, { 0x51, 0xff },
{ 0x50, 0xaa }, { 0x51, 0x00 },
{ 0x50, 0xab }, { 0x51, 0xff },
{ 0x50, 0xac }, { 0x51, 0xff },
{ 0x50, 0xad }, { 0x51, 0x00 },
{ 0x50, 0xae }, { 0x51, 0xff },
{ 0x50, 0xaf }, { 0x51, 0xff },
/*
* On this demod, post BER counts blocks. When the count reaches the
* value below, it collects the block error count. The block counters
* are initialized to 127 here. This warrants that all of them will be
* quickly calculated when device gets locked. As TMCC is parsed, the
* values will be adjusted later in the driver's code.
*/
{ 0x5e, 0x07 }, /* Turn on BER after Viterbi */
{ 0x50, 0xdc }, { 0x51, 0x00 },
{ 0x50, 0xdd }, { 0x51, 0x7f },
{ 0x50, 0xde }, { 0x51, 0x00 },
{ 0x50, 0xdf }, { 0x51, 0x7f },
{ 0x50, 0xe0 }, { 0x51, 0x00 },
{ 0x50, 0xe1 }, { 0x51, 0x7f },
/*
* On this demod, when the block count reaches the count below,
* it collects the block error count. The block counters are initialized
* to 127 here. This warrants that all of them will be quickly
* calculated when device gets locked. As TMCC is parsed, the values
* will be adjusted later in the driver's code.
*/
{ 0x50, 0xb0 }, { 0x51, 0x07 }, /* Enable PER */
{ 0x50, 0xb2 }, { 0x51, 0x00 },
{ 0x50, 0xb3 }, { 0x51, 0x7f },
{ 0x50, 0xb4 }, { 0x51, 0x00 },
{ 0x50, 0xb5 }, { 0x51, 0x7f },
{ 0x50, 0xb6 }, { 0x51, 0x00 },
{ 0x50, 0xb7 }, { 0x51, 0x7f },
{ 0x50, 0x50 }, { 0x51, 0x02 }, /* MER manual mode */
{ 0x50, 0x51 }, { 0x51, 0x04 }, /* MER symbol 4 */
{ 0x45, 0x04 }, /* CN symbol 4 */
{ 0x48, 0x04 }, /* CN manual mode */
{ 0x50, 0xd5 }, { 0x51, 0x01 },
{ 0x50, 0xd6 }, { 0x51, 0x1f },
{ 0x50, 0xd2 }, { 0x51, 0x03 },
{ 0x50, 0xd7 }, { 0x51, 0x3f },
{ 0x1c, 0x01 },
{ 0x28, 0x06 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x03 },
{ 0x28, 0x07 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x0d },
{ 0x28, 0x08 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x02 },
{ 0x28, 0x09 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x01 },
{ 0x28, 0x0a }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x21 },
{ 0x28, 0x0b }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x29 },
{ 0x28, 0x0c }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x16 },
{ 0x28, 0x0d }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x31 },
{ 0x28, 0x0e }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x0e },
{ 0x28, 0x0f }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x4e },
{ 0x28, 0x10 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x46 },
{ 0x28, 0x11 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x0f },
{ 0x28, 0x12 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x56 },
{ 0x28, 0x13 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x35 },
{ 0x28, 0x14 }, { 0x29, 0x00 }, { 0x2a, 0x01 }, { 0x2b, 0xbe },
{ 0x28, 0x15 }, { 0x29, 0x00 }, { 0x2a, 0x01 }, { 0x2b, 0x84 },
{ 0x28, 0x16 }, { 0x29, 0x00 }, { 0x2a, 0x03 }, { 0x2b, 0xee },
{ 0x28, 0x17 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x98 },
{ 0x28, 0x18 }, { 0x29, 0x00 }, { 0x2a, 0x00 }, { 0x2b, 0x9f },
{ 0x28, 0x19 }, { 0x29, 0x00 }, { 0x2a, 0x07 }, { 0x2b, 0xb2 },
{ 0x28, 0x1a }, { 0x29, 0x00 }, { 0x2a, 0x06 }, { 0x2b, 0xc2 },
{ 0x28, 0x1b }, { 0x29, 0x00 }, { 0x2a, 0x07 }, { 0x2b, 0x4a },
{ 0x28, 0x1c }, { 0x29, 0x00 }, { 0x2a, 0x01 }, { 0x2b, 0xbc },
{ 0x28, 0x1d }, { 0x29, 0x00 }, { 0x2a, 0x04 }, { 0x2b, 0xba },
{ 0x28, 0x1e }, { 0x29, 0x00 }, { 0x2a, 0x06 }, { 0x2b, 0x14 },
{ 0x50, 0x1e }, { 0x51, 0x5d },
{ 0x50, 0x22 }, { 0x51, 0x00 },
{ 0x50, 0x23 }, { 0x51, 0xc8 },
{ 0x50, 0x24 }, { 0x51, 0x00 },
{ 0x50, 0x25 }, { 0x51, 0xf0 },
{ 0x50, 0x26 }, { 0x51, 0x00 },
{ 0x50, 0x27 }, { 0x51, 0xc3 },
{ 0x50, 0x39 }, { 0x51, 0x02 },
{ 0x50, 0xd5 }, { 0x51, 0x01 },
{ 0xd0, 0x00 },
};
static struct regdata mb86a20s_reset_reception[] = {
{ 0x70, 0xf0 },
{ 0x70, 0xff },
{ 0x08, 0x01 },
{ 0x08, 0x00 },
};
static struct regdata mb86a20s_per_ber_reset[] = {
{ 0x53, 0x00 }, /* pre BER Counter reset */
{ 0x53, 0x07 },
{ 0x5f, 0x00 }, /* post BER Counter reset */
{ 0x5f, 0x07 },
{ 0x50, 0xb1 }, /* PER Counter reset */
{ 0x51, 0x07 },
{ 0x51, 0x00 },
};
/*
* I2C read/write functions and macros
*/
static int mb86a20s_i2c_writereg(struct mb86a20s_state *state,
u8 i2c_addr, u8 reg, u8 data)
{
u8 buf[] = { reg, data };
struct i2c_msg msg = {
.addr = i2c_addr, .flags = 0, .buf = buf, .len = 2
};
int rc;
rc = i2c_transfer(state->i2c, &msg, 1);
if (rc != 1) {
dev_err(&state->i2c->dev,
"%s: writereg error (rc == %i, reg == 0x%02x, data == 0x%02x)\n",
__func__, rc, reg, data);
return rc;
}
return 0;
}
static int mb86a20s_i2c_writeregdata(struct mb86a20s_state *state,
u8 i2c_addr, struct regdata *rd, int size)
{
int i, rc;
for (i = 0; i < size; i++) {
rc = mb86a20s_i2c_writereg(state, i2c_addr, rd[i].reg,
rd[i].data);
if (rc < 0)
return rc;
}
return 0;
}
static int mb86a20s_i2c_readreg(struct mb86a20s_state *state,
u8 i2c_addr, u8 reg)
{
u8 val;
int rc;
struct i2c_msg msg[] = {
{ .addr = i2c_addr, .flags = 0, .buf = &reg, .len = 1 },
{ .addr = i2c_addr, .flags = I2C_M_RD, .buf = &val, .len = 1 }
};
rc = i2c_transfer(state->i2c, msg, 2);
if (rc != 2) {
dev_err(&state->i2c->dev, "%s: reg=0x%x (error=%d)\n",
__func__, reg, rc);
return (rc < 0) ? rc : -EIO;
}
return val;
}
#define mb86a20s_readreg(state, reg) \
mb86a20s_i2c_readreg(state, state->config->demod_address, reg)
#define mb86a20s_writereg(state, reg, val) \
mb86a20s_i2c_writereg(state, state->config->demod_address, reg, val)
#define mb86a20s_writeregdata(state, regdata) \
mb86a20s_i2c_writeregdata(state, state->config->demod_address, \
regdata, ARRAY_SIZE(regdata))
/*
* Ancillary internal routines (likely compiled inlined)
*
* The functions below assume that gateway lock has already obtained
*/
static int mb86a20s_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
struct mb86a20s_state *state = fe->demodulator_priv;
int val;
*status = 0;
val = mb86a20s_readreg(state, 0x0a);
if (val < 0)
return val;
val &= 0xf;
if (val >= 2)
*status |= FE_HAS_SIGNAL;
if (val >= 4)
*status |= FE_HAS_CARRIER;
if (val >= 5)
*status |= FE_HAS_VITERBI;
if (val >= 7)
*status |= FE_HAS_SYNC;
/*
* Actually, on state S8, it starts receiving TS, but the TS
* output is only on normal state after the transition to S9.
*/
if (val >= 9)
*status |= FE_HAS_LOCK;
dev_dbg(&state->i2c->dev, "%s: Status = 0x%02x (state = %d)\n",
__func__, *status, val);
return val;
}
static int mb86a20s_read_signal_strength(struct dvb_frontend *fe)
{
struct mb86a20s_state *state = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int rc;
unsigned rf_max, rf_min, rf;
if (state->get_strength_time &&
(!time_after(jiffies, state->get_strength_time)))
return c->strength.stat[0].uvalue;
/* Reset its value if an error happen */
c->strength.stat[0].uvalue = 0;
/* Does a binary search to get RF strength */
rf_max = 0xfff;
rf_min = 0;
do {
rf = (rf_max + rf_min) / 2;
rc = mb86a20s_writereg(state, 0x04, 0x1f);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x05, rf >> 8);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x04, 0x20);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x05, rf);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x02);
if (rc < 0)
return rc;
if (rc & 0x08)
rf_min = (rf_max + rf_min) / 2;
else
rf_max = (rf_max + rf_min) / 2;
if (rf_max - rf_min < 4) {
rf = (rf_max + rf_min) / 2;
/* Rescale it from 2^12 (4096) to 2^16 */
rf = rf << (16 - 12);
if (rf)
rf |= (1 << 12) - 1;
dev_dbg(&state->i2c->dev,
"%s: signal strength = %d (%d < RF=%d < %d)\n",
__func__, rf, rf_min, rf >> 4, rf_max);
c->strength.stat[0].uvalue = rf;
state->get_strength_time = jiffies +
msecs_to_jiffies(1000);
return 0;
}
} while (1);
}
static int mb86a20s_get_modulation(struct mb86a20s_state *state,
unsigned layer)
{
int rc;
static unsigned char reg[] = {
[0] = 0x86, /* Layer A */
[1] = 0x8a, /* Layer B */
[2] = 0x8e, /* Layer C */
};
if (layer >= ARRAY_SIZE(reg))
return -EINVAL;
rc = mb86a20s_writereg(state, 0x6d, reg[layer]);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x6e);
if (rc < 0)
return rc;
switch ((rc >> 4) & 0x07) {
case 0:
return DQPSK;
case 1:
return QPSK;
case 2:
return QAM_16;
case 3:
return QAM_64;
default:
return QAM_AUTO;
}
}
static int mb86a20s_get_fec(struct mb86a20s_state *state,
unsigned layer)
{
int rc;
static unsigned char reg[] = {
[0] = 0x87, /* Layer A */
[1] = 0x8b, /* Layer B */
[2] = 0x8f, /* Layer C */
};
if (layer >= ARRAY_SIZE(reg))
return -EINVAL;
rc = mb86a20s_writereg(state, 0x6d, reg[layer]);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x6e);
if (rc < 0)
return rc;
switch ((rc >> 4) & 0x07) {
case 0:
return FEC_1_2;
case 1:
return FEC_2_3;
case 2:
return FEC_3_4;
case 3:
return FEC_5_6;
case 4:
return FEC_7_8;
default:
return FEC_AUTO;
}
}
static int mb86a20s_get_interleaving(struct mb86a20s_state *state,
unsigned layer)
{
int rc;
int interleaving[] = {
0, 1, 2, 4, 8
};
static unsigned char reg[] = {
[0] = 0x88, /* Layer A */
[1] = 0x8c, /* Layer B */
[2] = 0x90, /* Layer C */
};
if (layer >= ARRAY_SIZE(reg))
return -EINVAL;
rc = mb86a20s_writereg(state, 0x6d, reg[layer]);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x6e);
if (rc < 0)
return rc;
return interleaving[(rc >> 4) & 0x07];
}
static int mb86a20s_get_segment_count(struct mb86a20s_state *state,
unsigned layer)
{
int rc, count;
static unsigned char reg[] = {
[0] = 0x89, /* Layer A */
[1] = 0x8d, /* Layer B */
[2] = 0x91, /* Layer C */
};
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
if (layer >= ARRAY_SIZE(reg))
return -EINVAL;
rc = mb86a20s_writereg(state, 0x6d, reg[layer]);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x6e);
if (rc < 0)
return rc;
count = (rc >> 4) & 0x0f;
dev_dbg(&state->i2c->dev, "%s: segments: %d.\n", __func__, count);
return count;
}
static void mb86a20s_reset_frontend_cache(struct dvb_frontend *fe)
{
struct mb86a20s_state *state = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
/* Fixed parameters */
c->delivery_system = SYS_ISDBT;
c->bandwidth_hz = 6000000;
/* Initialize values that will be later autodetected */
c->isdbt_layer_enabled = 0;
c->transmission_mode = TRANSMISSION_MODE_AUTO;
c->guard_interval = GUARD_INTERVAL_AUTO;
c->isdbt_sb_mode = 0;
c->isdbt_sb_segment_count = 0;
}
/*
* Estimates the bit rate using the per-segment bit rate given by
* ABNT/NBR 15601 spec (table 4).
*/
static const u32 isdbt_rate[3][5][4] = {
{ /* DQPSK/QPSK */
{ 280850, 312060, 330420, 340430 }, /* 1/2 */
{ 374470, 416080, 440560, 453910 }, /* 2/3 */
{ 421280, 468090, 495630, 510650 }, /* 3/4 */
{ 468090, 520100, 550700, 567390 }, /* 5/6 */
{ 491500, 546110, 578230, 595760 }, /* 7/8 */
}, { /* QAM16 */
{ 561710, 624130, 660840, 680870 }, /* 1/2 */
{ 748950, 832170, 881120, 907820 }, /* 2/3 */
{ 842570, 936190, 991260, 1021300 }, /* 3/4 */
{ 936190, 1040210, 1101400, 1134780 }, /* 5/6 */
{ 983000, 1092220, 1156470, 1191520 }, /* 7/8 */
}, { /* QAM64 */
{ 842570, 936190, 991260, 1021300 }, /* 1/2 */
{ 1123430, 1248260, 1321680, 1361740 }, /* 2/3 */
{ 1263860, 1404290, 1486900, 1531950 }, /* 3/4 */
{ 1404290, 1560320, 1652110, 1702170 }, /* 5/6 */
{ 1474500, 1638340, 1734710, 1787280 }, /* 7/8 */
}
};
static u32 isdbt_layer_min_bitrate(struct dtv_frontend_properties *c,
u32 layer)
{
int mod, fec, guard;
/*
* If modulation/fec/guard is not detected, the default is
* to consider the lowest bit rate, to avoid taking too long time
* to get BER.
*/
switch (c->layer[layer].modulation) {
case DQPSK:
case QPSK:
default:
mod = 0;
break;
case QAM_16:
mod = 1;
break;
case QAM_64:
mod = 2;
break;
}
switch (c->layer[layer].fec) {
default:
case FEC_1_2:
case FEC_AUTO:
fec = 0;
break;
case FEC_2_3:
fec = 1;
break;
case FEC_3_4:
fec = 2;
break;
case FEC_5_6:
fec = 3;
break;
case FEC_7_8:
fec = 4;
break;
}
switch (c->guard_interval) {
default:
case GUARD_INTERVAL_1_4:
guard = 0;
break;
case GUARD_INTERVAL_1_8:
guard = 1;
break;
case GUARD_INTERVAL_1_16:
guard = 2;
break;
case GUARD_INTERVAL_1_32:
guard = 3;
break;
}
return isdbt_rate[mod][fec][guard] * c->layer[layer].segment_count;
}
static int mb86a20s_get_frontend(struct dvb_frontend *fe)
{
struct mb86a20s_state *state = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int layer, rc, rate, counter;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
/* Reset frontend cache to default values */
mb86a20s_reset_frontend_cache(fe);
/* Check for partial reception */
rc = mb86a20s_writereg(state, 0x6d, 0x85);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x6e);
if (rc < 0)
return rc;
c->isdbt_partial_reception = (rc & 0x10) ? 1 : 0;
/* Get per-layer data */
for (layer = 0; layer < NUM_LAYERS; layer++) {
dev_dbg(&state->i2c->dev, "%s: getting data for layer %c.\n",
__func__, 'A' + layer);
rc = mb86a20s_get_segment_count(state, layer);
if (rc < 0)
goto noperlayer_error;
if (rc >= 0 && rc < 14) {
c->layer[layer].segment_count = rc;
} else {
c->layer[layer].segment_count = 0;
state->estimated_rate[layer] = 0;
continue;
}
c->isdbt_layer_enabled |= 1 << layer;
rc = mb86a20s_get_modulation(state, layer);
if (rc < 0)
goto noperlayer_error;
dev_dbg(&state->i2c->dev, "%s: modulation %d.\n",
__func__, rc);
c->layer[layer].modulation = rc;
rc = mb86a20s_get_fec(state, layer);
if (rc < 0)
goto noperlayer_error;
dev_dbg(&state->i2c->dev, "%s: FEC %d.\n",
__func__, rc);
c->layer[layer].fec = rc;
rc = mb86a20s_get_interleaving(state, layer);
if (rc < 0)
goto noperlayer_error;
dev_dbg(&state->i2c->dev, "%s: interleaving %d.\n",
__func__, rc);
c->layer[layer].interleaving = rc;
rate = isdbt_layer_min_bitrate(c, layer);
counter = rate * BER_SAMPLING_RATE;
/* Avoids sampling too quickly or to overflow the register */
if (counter < 256)
counter = 256;
else if (counter > (1 << 24) - 1)
counter = (1 << 24) - 1;
dev_dbg(&state->i2c->dev,
"%s: layer %c bitrate: %d kbps; counter = %d (0x%06x)\n",
__func__, 'A' + layer, rate / 1000, counter, counter);
state->estimated_rate[layer] = counter;
}
rc = mb86a20s_writereg(state, 0x6d, 0x84);
if (rc < 0)
return rc;
if ((rc & 0x60) == 0x20) {
c->isdbt_sb_mode = 1;
/* At least, one segment should exist */
if (!c->isdbt_sb_segment_count)
c->isdbt_sb_segment_count = 1;
}
/* Get transmission mode and guard interval */
rc = mb86a20s_readreg(state, 0x07);
if (rc < 0)
return rc;
c->transmission_mode = TRANSMISSION_MODE_AUTO;
if ((rc & 0x60) == 0x20) {
/* Only modes 2 and 3 are supported */
switch ((rc >> 2) & 0x03) {
case 1:
c->transmission_mode = TRANSMISSION_MODE_4K;
break;
case 2:
c->transmission_mode = TRANSMISSION_MODE_8K;
break;
}
}
c->guard_interval = GUARD_INTERVAL_AUTO;
if (!(rc & 0x10)) {
/* Guard interval 1/32 is not supported */
switch (rc & 0x3) {
case 0:
c->guard_interval = GUARD_INTERVAL_1_4;
break;
case 1:
c->guard_interval = GUARD_INTERVAL_1_8;
break;
case 2:
c->guard_interval = GUARD_INTERVAL_1_16;
break;
}
}
return 0;
noperlayer_error:
/* per-layer info is incomplete; discard all per-layer */
c->isdbt_layer_enabled = 0;
return rc;
}
static int mb86a20s_reset_counters(struct dvb_frontend *fe)
{
struct mb86a20s_state *state = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int rc, val;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
/* Reset the counters, if the channel changed */
if (state->last_frequency != c->frequency) {
memset(&c->cnr, 0, sizeof(c->cnr));
memset(&c->pre_bit_error, 0, sizeof(c->pre_bit_error));
memset(&c->pre_bit_count, 0, sizeof(c->pre_bit_count));
memset(&c->post_bit_error, 0, sizeof(c->post_bit_error));
memset(&c->post_bit_count, 0, sizeof(c->post_bit_count));
memset(&c->block_error, 0, sizeof(c->block_error));
memset(&c->block_count, 0, sizeof(c->block_count));
state->last_frequency = c->frequency;
}
/* Clear status for most stats */
/* BER/PER counter reset */
rc = mb86a20s_writeregdata(state, mb86a20s_per_ber_reset);
if (rc < 0)
goto err;
/* CNR counter reset */
rc = mb86a20s_readreg(state, 0x45);
if (rc < 0)
goto err;
val = rc;
rc = mb86a20s_writereg(state, 0x45, val | 0x10);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x45, val & 0x6f);
if (rc < 0)
goto err;
/* MER counter reset */
rc = mb86a20s_writereg(state, 0x50, 0x50);
if (rc < 0)
goto err;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
goto err;
val = rc;
rc = mb86a20s_writereg(state, 0x51, val | 0x01);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x51, val & 0x06);
if (rc < 0)
goto err;
goto ok;
err:
dev_err(&state->i2c->dev,
"%s: Can't reset FE statistics (error %d).\n",
__func__, rc);
ok:
return rc;
}
static int mb86a20s_get_pre_ber(struct dvb_frontend *fe,
unsigned layer,
u32 *error, u32 *count)
{
struct mb86a20s_state *state = fe->demodulator_priv;
int rc, val;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
if (layer >= NUM_LAYERS)
return -EINVAL;
/* Check if the BER measures are already available */
rc = mb86a20s_readreg(state, 0x54);
if (rc < 0)
return rc;
/* Check if data is available for that layer */
if (!(rc & (1 << layer))) {
dev_dbg(&state->i2c->dev,
"%s: preBER for layer %c is not available yet.\n",
__func__, 'A' + layer);
return -EBUSY;
}
/* Read Bit Error Count */
rc = mb86a20s_readreg(state, 0x55 + layer * 3);
if (rc < 0)
return rc;
*error = rc << 16;
rc = mb86a20s_readreg(state, 0x56 + layer * 3);
if (rc < 0)
return rc;
*error |= rc << 8;
rc = mb86a20s_readreg(state, 0x57 + layer * 3);
if (rc < 0)
return rc;
*error |= rc;
dev_dbg(&state->i2c->dev,
"%s: bit error before Viterbi for layer %c: %d.\n",
__func__, 'A' + layer, *error);
/* Read Bit Count */
rc = mb86a20s_writereg(state, 0x50, 0xa7 + layer * 3);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
*count = rc << 16;
rc = mb86a20s_writereg(state, 0x50, 0xa8 + layer * 3);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
*count |= rc << 8;
rc = mb86a20s_writereg(state, 0x50, 0xa9 + layer * 3);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
*count |= rc;
dev_dbg(&state->i2c->dev,
"%s: bit count before Viterbi for layer %c: %d.\n",
__func__, 'A' + layer, *count);
/*
* As we get TMCC data from the frontend, we can better estimate the
* BER bit counters, in order to do the BER measure during a longer
* time. Use those data, if available, to update the bit count
* measure.
*/
if (state->estimated_rate[layer]
&& state->estimated_rate[layer] != *count) {
dev_dbg(&state->i2c->dev,
"%s: updating layer %c preBER counter to %d.\n",
__func__, 'A' + layer, state->estimated_rate[layer]);
/* Turn off BER before Viterbi */
rc = mb86a20s_writereg(state, 0x52, 0x00);
/* Update counter for this layer */
rc = mb86a20s_writereg(state, 0x50, 0xa7 + layer * 3);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51,
state->estimated_rate[layer] >> 16);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x50, 0xa8 + layer * 3);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51,
state->estimated_rate[layer] >> 8);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x50, 0xa9 + layer * 3);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51,
state->estimated_rate[layer]);
if (rc < 0)
return rc;
/* Turn on BER before Viterbi */
rc = mb86a20s_writereg(state, 0x52, 0x01);
/* Reset all preBER counters */
rc = mb86a20s_writereg(state, 0x53, 0x00);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x53, 0x07);
} else {
/* Reset counter to collect new data */
rc = mb86a20s_readreg(state, 0x53);
if (rc < 0)
return rc;
val = rc;
rc = mb86a20s_writereg(state, 0x53, val & ~(1 << layer));
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x53, val | (1 << layer));
}
return rc;
}
static int mb86a20s_get_post_ber(struct dvb_frontend *fe,
unsigned layer,
u32 *error, u32 *count)
{
struct mb86a20s_state *state = fe->demodulator_priv;
u32 counter, collect_rate;
int rc, val;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
if (layer >= NUM_LAYERS)
return -EINVAL;
/* Check if the BER measures are already available */
rc = mb86a20s_readreg(state, 0x60);
if (rc < 0)
return rc;
/* Check if data is available for that layer */
if (!(rc & (1 << layer))) {
dev_dbg(&state->i2c->dev,
"%s: post BER for layer %c is not available yet.\n",
__func__, 'A' + layer);
return -EBUSY;
}
/* Read Bit Error Count */
rc = mb86a20s_readreg(state, 0x64 + layer * 3);
if (rc < 0)
return rc;
*error = rc << 16;
rc = mb86a20s_readreg(state, 0x65 + layer * 3);
if (rc < 0)
return rc;
*error |= rc << 8;
rc = mb86a20s_readreg(state, 0x66 + layer * 3);
if (rc < 0)
return rc;
*error |= rc;
dev_dbg(&state->i2c->dev,
"%s: post bit error for layer %c: %d.\n",
__func__, 'A' + layer, *error);
/* Read Bit Count */
rc = mb86a20s_writereg(state, 0x50, 0xdc + layer * 2);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
counter = rc << 8;
rc = mb86a20s_writereg(state, 0x50, 0xdd + layer * 2);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
counter |= rc;
*count = counter * 204 * 8;
dev_dbg(&state->i2c->dev,
"%s: post bit count for layer %c: %d.\n",
__func__, 'A' + layer, *count);
/*
* As we get TMCC data from the frontend, we can better estimate the
* BER bit counters, in order to do the BER measure during a longer
* time. Use those data, if available, to update the bit count
* measure.
*/
if (!state->estimated_rate[layer])
goto reset_measurement;
collect_rate = state->estimated_rate[layer] / 204 / 8;
if (collect_rate < 32)
collect_rate = 32;
if (collect_rate > 65535)
collect_rate = 65535;
if (collect_rate != counter) {
dev_dbg(&state->i2c->dev,
"%s: updating postBER counter on layer %c to %d.\n",
__func__, 'A' + layer, collect_rate);
/* Turn off BER after Viterbi */
rc = mb86a20s_writereg(state, 0x5e, 0x00);
/* Update counter for this layer */
rc = mb86a20s_writereg(state, 0x50, 0xdc + layer * 2);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, collect_rate >> 8);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x50, 0xdd + layer * 2);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, collect_rate & 0xff);
if (rc < 0)
return rc;
/* Turn on BER after Viterbi */
rc = mb86a20s_writereg(state, 0x5e, 0x07);
/* Reset all preBER counters */
rc = mb86a20s_writereg(state, 0x5f, 0x00);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x5f, 0x07);
return rc;
}
reset_measurement:
/* Reset counter to collect new data */
rc = mb86a20s_readreg(state, 0x5f);
if (rc < 0)
return rc;
val = rc;
rc = mb86a20s_writereg(state, 0x5f, val & ~(1 << layer));
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x5f, val | (1 << layer));
return rc;
}
static int mb86a20s_get_blk_error(struct dvb_frontend *fe,
unsigned layer,
u32 *error, u32 *count)
{
struct mb86a20s_state *state = fe->demodulator_priv;
int rc, val;
u32 collect_rate;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
if (layer >= NUM_LAYERS)
return -EINVAL;
/* Check if the PER measures are already available */
rc = mb86a20s_writereg(state, 0x50, 0xb8);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
/* Check if data is available for that layer */
if (!(rc & (1 << layer))) {
dev_dbg(&state->i2c->dev,
"%s: block counts for layer %c aren't available yet.\n",
__func__, 'A' + layer);
return -EBUSY;
}
/* Read Packet error Count */
rc = mb86a20s_writereg(state, 0x50, 0xb9 + layer * 2);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
*error = rc << 8;
rc = mb86a20s_writereg(state, 0x50, 0xba + layer * 2);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
*error |= rc;
dev_dbg(&state->i2c->dev, "%s: block error for layer %c: %d.\n",
__func__, 'A' + layer, *error);
/* Read Bit Count */
rc = mb86a20s_writereg(state, 0x50, 0xb2 + layer * 2);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
*count = rc << 8;
rc = mb86a20s_writereg(state, 0x50, 0xb3 + layer * 2);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
*count |= rc;
dev_dbg(&state->i2c->dev,
"%s: block count for layer %c: %d.\n",
__func__, 'A' + layer, *count);
/*
* As we get TMCC data from the frontend, we can better estimate the
* BER bit counters, in order to do the BER measure during a longer
* time. Use those data, if available, to update the bit count
* measure.
*/
if (!state->estimated_rate[layer])
goto reset_measurement;
collect_rate = state->estimated_rate[layer] / 204 / 8;
if (collect_rate < 32)
collect_rate = 32;
if (collect_rate > 65535)
collect_rate = 65535;
if (collect_rate != *count) {
dev_dbg(&state->i2c->dev,
"%s: updating PER counter on layer %c to %d.\n",
__func__, 'A' + layer, collect_rate);
/* Stop PER measurement */
rc = mb86a20s_writereg(state, 0x50, 0xb0);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, 0x00);
if (rc < 0)
return rc;
/* Update this layer's counter */
rc = mb86a20s_writereg(state, 0x50, 0xb2 + layer * 2);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, collect_rate >> 8);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x50, 0xb3 + layer * 2);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, collect_rate & 0xff);
if (rc < 0)
return rc;
/* start PER measurement */
rc = mb86a20s_writereg(state, 0x50, 0xb0);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, 0x07);
if (rc < 0)
return rc;
/* Reset all counters to collect new data */
rc = mb86a20s_writereg(state, 0x50, 0xb1);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, 0x07);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, 0x00);
return rc;
}
reset_measurement:
/* Reset counter to collect new data */
rc = mb86a20s_writereg(state, 0x50, 0xb1);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
val = rc;
rc = mb86a20s_writereg(state, 0x51, val | (1 << layer));
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, val & ~(1 << layer));
return rc;
}
struct linear_segments {
unsigned x, y;
};
/*
* All tables below return a dB/1000 measurement
*/
static const struct linear_segments cnr_to_db_table[] = {
{ 19648, 0},
{ 18187, 1000},
{ 16534, 2000},
{ 14823, 3000},
{ 13161, 4000},
{ 11622, 5000},
{ 10279, 6000},
{ 9089, 7000},
{ 8042, 8000},
{ 7137, 9000},
{ 6342, 10000},
{ 5641, 11000},
{ 5030, 12000},
{ 4474, 13000},
{ 3988, 14000},
{ 3556, 15000},
{ 3180, 16000},
{ 2841, 17000},
{ 2541, 18000},
{ 2276, 19000},
{ 2038, 20000},
{ 1800, 21000},
{ 1625, 22000},
{ 1462, 23000},
{ 1324, 24000},
{ 1175, 25000},
{ 1063, 26000},
{ 980, 27000},
{ 907, 28000},
{ 840, 29000},
{ 788, 30000},
};
static const struct linear_segments cnr_64qam_table[] = {
{ 3922688, 0},
{ 3920384, 1000},
{ 3902720, 2000},
{ 3894784, 3000},
{ 3882496, 4000},
{ 3872768, 5000},
{ 3858944, 6000},
{ 3851520, 7000},
{ 3838976, 8000},
{ 3829248, 9000},
{ 3818240, 10000},
{ 3806976, 11000},
{ 3791872, 12000},
{ 3767040, 13000},
{ 3720960, 14000},
{ 3637504, 15000},
{ 3498496, 16000},
{ 3296000, 17000},
{ 3031040, 18000},
{ 2715392, 19000},
{ 2362624, 20000},
{ 1963264, 21000},
{ 1649664, 22000},
{ 1366784, 23000},
{ 1120768, 24000},
{ 890880, 25000},
{ 723456, 26000},
{ 612096, 27000},
{ 518912, 28000},
{ 448256, 29000},
{ 388864, 30000},
};
static const struct linear_segments cnr_16qam_table[] = {
{ 5314816, 0},
{ 5219072, 1000},
{ 5118720, 2000},
{ 4998912, 3000},
{ 4875520, 4000},
{ 4736000, 5000},
{ 4604160, 6000},
{ 4458752, 7000},
{ 4300288, 8000},
{ 4092928, 9000},
{ 3836160, 10000},
{ 3521024, 11000},
{ 3155968, 12000},
{ 2756864, 13000},
{ 2347008, 14000},
{ 1955072, 15000},
{ 1593600, 16000},
{ 1297920, 17000},
{ 1043968, 18000},
{ 839680, 19000},
{ 672256, 20000},
{ 523008, 21000},
{ 424704, 22000},
{ 345088, 23000},
{ 280064, 24000},
{ 221440, 25000},
{ 179712, 26000},
{ 151040, 27000},
{ 128512, 28000},
{ 110080, 29000},
{ 95744, 30000},
};
static const struct linear_segments cnr_qpsk_table[] = {
{ 2834176, 0},
{ 2683648, 1000},
{ 2536960, 2000},
{ 2391808, 3000},
{ 2133248, 4000},
{ 1906176, 5000},
{ 1666560, 6000},
{ 1422080, 7000},
{ 1189632, 8000},
{ 976384, 9000},
{ 790272, 10000},
{ 633344, 11000},
{ 505600, 12000},
{ 402944, 13000},
{ 320768, 14000},
{ 255488, 15000},
{ 204032, 16000},
{ 163072, 17000},
{ 130304, 18000},
{ 105216, 19000},
{ 83456, 20000},
{ 65024, 21000},
{ 52480, 22000},
{ 42752, 23000},
{ 34560, 24000},
{ 27136, 25000},
{ 22016, 26000},
{ 18432, 27000},
{ 15616, 28000},
{ 13312, 29000},
{ 11520, 30000},
};
static u32 interpolate_value(u32 value, const struct linear_segments *segments,
unsigned len)
{
u64 tmp64;
u32 dx, dy;
int i, ret;
if (value >= segments[0].x)
return segments[0].y;
if (value < segments[len-1].x)
return segments[len-1].y;
for (i = 1; i < len - 1; i++) {
/* If value is identical, no need to interpolate */
if (value == segments[i].x)
return segments[i].y;
if (value > segments[i].x)
break;
}
/* Linear interpolation between the two (x,y) points */
dy = segments[i].y - segments[i - 1].y;
dx = segments[i - 1].x - segments[i].x;
tmp64 = value - segments[i].x;
tmp64 *= dy;
do_div(tmp64, dx);
ret = segments[i].y - tmp64;
return ret;
}
static int mb86a20s_get_main_CNR(struct dvb_frontend *fe)
{
struct mb86a20s_state *state = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
u32 cnr_linear, cnr;
int rc, val;
/* Check if CNR is available */
rc = mb86a20s_readreg(state, 0x45);
if (rc < 0)
return rc;
if (!(rc & 0x40)) {
dev_dbg(&state->i2c->dev, "%s: CNR is not available yet.\n",
__func__);
return -EBUSY;
}
val = rc;
rc = mb86a20s_readreg(state, 0x46);
if (rc < 0)
return rc;
cnr_linear = rc << 8;
rc = mb86a20s_readreg(state, 0x46);
if (rc < 0)
return rc;
cnr_linear |= rc;
cnr = interpolate_value(cnr_linear,
cnr_to_db_table, ARRAY_SIZE(cnr_to_db_table));
c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
c->cnr.stat[0].svalue = cnr;
dev_dbg(&state->i2c->dev, "%s: CNR is %d.%03d dB (%d)\n",
__func__, cnr / 1000, cnr % 1000, cnr_linear);
/* CNR counter reset */
rc = mb86a20s_writereg(state, 0x45, val | 0x10);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x45, val & 0x6f);
return rc;
}
static int mb86a20s_get_blk_error_layer_CNR(struct dvb_frontend *fe)
{
struct mb86a20s_state *state = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
u32 mer, cnr;
int rc, val, layer;
const struct linear_segments *segs;
unsigned segs_len;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
/* Check if the measures are already available */
rc = mb86a20s_writereg(state, 0x50, 0x5b);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
/* Check if data is available */
if (!(rc & 0x01)) {
dev_dbg(&state->i2c->dev,
"%s: MER measures aren't available yet.\n", __func__);
return -EBUSY;
}
/* Read all layers */
for (layer = 0; layer < NUM_LAYERS; layer++) {
if (!(c->isdbt_layer_enabled & (1 << layer))) {
c->cnr.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
continue;
}
rc = mb86a20s_writereg(state, 0x50, 0x52 + layer * 3);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
mer = rc << 16;
rc = mb86a20s_writereg(state, 0x50, 0x53 + layer * 3);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
mer |= rc << 8;
rc = mb86a20s_writereg(state, 0x50, 0x54 + layer * 3);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
mer |= rc;
switch (c->layer[layer].modulation) {
case DQPSK:
case QPSK:
segs = cnr_qpsk_table;
segs_len = ARRAY_SIZE(cnr_qpsk_table);
break;
case QAM_16:
segs = cnr_16qam_table;
segs_len = ARRAY_SIZE(cnr_16qam_table);
break;
default:
case QAM_64:
segs = cnr_64qam_table;
segs_len = ARRAY_SIZE(cnr_64qam_table);
break;
}
cnr = interpolate_value(mer, segs, segs_len);
c->cnr.stat[1 + layer].scale = FE_SCALE_DECIBEL;
c->cnr.stat[1 + layer].svalue = cnr;
dev_dbg(&state->i2c->dev,
"%s: CNR for layer %c is %d.%03d dB (MER = %d).\n",
__func__, 'A' + layer, cnr / 1000, cnr % 1000, mer);
}
/* Start a new MER measurement */
/* MER counter reset */
rc = mb86a20s_writereg(state, 0x50, 0x50);
if (rc < 0)
return rc;
rc = mb86a20s_readreg(state, 0x51);
if (rc < 0)
return rc;
val = rc;
rc = mb86a20s_writereg(state, 0x51, val | 0x01);
if (rc < 0)
return rc;
rc = mb86a20s_writereg(state, 0x51, val & 0x06);
if (rc < 0)
return rc;
return 0;
}
static void mb86a20s_stats_not_ready(struct dvb_frontend *fe)
{
struct mb86a20s_state *state = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int layer;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
/* Fill the length of each status counter */
/* Only global stats */
c->strength.len = 1;
/* Per-layer stats - 3 layers + global */
c->cnr.len = NUM_LAYERS + 1;
c->pre_bit_error.len = NUM_LAYERS + 1;
c->pre_bit_count.len = NUM_LAYERS + 1;
c->post_bit_error.len = NUM_LAYERS + 1;
c->post_bit_count.len = NUM_LAYERS + 1;
c->block_error.len = NUM_LAYERS + 1;
c->block_count.len = NUM_LAYERS + 1;
/* Signal is always available */
c->strength.stat[0].scale = FE_SCALE_RELATIVE;
c->strength.stat[0].uvalue = 0;
/* Put all of them at FE_SCALE_NOT_AVAILABLE */
for (layer = 0; layer < NUM_LAYERS + 1; layer++) {
c->cnr.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
c->pre_bit_error.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
c->pre_bit_count.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
c->post_bit_error.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
c->post_bit_count.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
c->block_error.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
c->block_count.stat[layer].scale = FE_SCALE_NOT_AVAILABLE;
}
}
static int mb86a20s_get_stats(struct dvb_frontend *fe, int status_nr)
{
struct mb86a20s_state *state = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int rc = 0, layer;
u32 bit_error = 0, bit_count = 0;
u32 t_pre_bit_error = 0, t_pre_bit_count = 0;
u32 t_post_bit_error = 0, t_post_bit_count = 0;
u32 block_error = 0, block_count = 0;
u32 t_block_error = 0, t_block_count = 0;
int active_layers = 0, pre_ber_layers = 0, post_ber_layers = 0;
int per_layers = 0;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
mb86a20s_get_main_CNR(fe);
/* Get per-layer stats */
mb86a20s_get_blk_error_layer_CNR(fe);
/*
* At state 7, only CNR is available
* For BER measures, state=9 is required
* FIXME: we may get MER measures with state=8
*/
if (status_nr < 9)
return 0;
for (layer = 0; layer < NUM_LAYERS; layer++) {
if (c->isdbt_layer_enabled & (1 << layer)) {
/* Layer is active and has rc segments */
active_layers++;
/* Handle BER before vterbi */
rc = mb86a20s_get_pre_ber(fe, layer,
&bit_error, &bit_count);
if (rc >= 0) {
c->pre_bit_error.stat[1 + layer].scale = FE_SCALE_COUNTER;
c->pre_bit_error.stat[1 + layer].uvalue += bit_error;
c->pre_bit_count.stat[1 + layer].scale = FE_SCALE_COUNTER;
c->pre_bit_count.stat[1 + layer].uvalue += bit_count;
} else if (rc != -EBUSY) {
/*
* If an I/O error happened,
* measures are now unavailable
*/
c->pre_bit_error.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
c->pre_bit_count.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
dev_err(&state->i2c->dev,
"%s: Can't get BER for layer %c (error %d).\n",
__func__, 'A' + layer, rc);
}
if (c->block_error.stat[1 + layer].scale != FE_SCALE_NOT_AVAILABLE)
pre_ber_layers++;
/* Handle BER post vterbi */
rc = mb86a20s_get_post_ber(fe, layer,
&bit_error, &bit_count);
if (rc >= 0) {
c->post_bit_error.stat[1 + layer].scale = FE_SCALE_COUNTER;
c->post_bit_error.stat[1 + layer].uvalue += bit_error;
c->post_bit_count.stat[1 + layer].scale = FE_SCALE_COUNTER;
c->post_bit_count.stat[1 + layer].uvalue += bit_count;
} else if (rc != -EBUSY) {
/*
* If an I/O error happened,
* measures are now unavailable
*/
c->post_bit_error.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
c->post_bit_count.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
dev_err(&state->i2c->dev,
"%s: Can't get BER for layer %c (error %d).\n",
__func__, 'A' + layer, rc);
}
if (c->block_error.stat[1 + layer].scale != FE_SCALE_NOT_AVAILABLE)
post_ber_layers++;
/* Handle Block errors for PER/UCB reports */
rc = mb86a20s_get_blk_error(fe, layer,
&block_error,
&block_count);
if (rc >= 0) {
c->block_error.stat[1 + layer].scale = FE_SCALE_COUNTER;
c->block_error.stat[1 + layer].uvalue += block_error;
c->block_count.stat[1 + layer].scale = FE_SCALE_COUNTER;
c->block_count.stat[1 + layer].uvalue += block_count;
} else if (rc != -EBUSY) {
/*
* If an I/O error happened,
* measures are now unavailable
*/
c->block_error.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
c->block_count.stat[1 + layer].scale = FE_SCALE_NOT_AVAILABLE;
dev_err(&state->i2c->dev,
"%s: Can't get PER for layer %c (error %d).\n",
__func__, 'A' + layer, rc);
}
if (c->block_error.stat[1 + layer].scale != FE_SCALE_NOT_AVAILABLE)
per_layers++;
/* Update total preBER */
t_pre_bit_error += c->pre_bit_error.stat[1 + layer].uvalue;
t_pre_bit_count += c->pre_bit_count.stat[1 + layer].uvalue;
/* Update total postBER */
t_post_bit_error += c->post_bit_error.stat[1 + layer].uvalue;
t_post_bit_count += c->post_bit_count.stat[1 + layer].uvalue;
/* Update total PER */
t_block_error += c->block_error.stat[1 + layer].uvalue;
t_block_count += c->block_count.stat[1 + layer].uvalue;
}
}
/*
* Start showing global count if at least one error count is
* available.
*/
if (pre_ber_layers) {
/*
* At least one per-layer BER measure was read. We can now
* calculate the total BER
*
* Total Bit Error/Count is calculated as the sum of the
* bit errors on all active layers.
*/
c->pre_bit_error.stat[0].scale = FE_SCALE_COUNTER;
c->pre_bit_error.stat[0].uvalue = t_pre_bit_error;
c->pre_bit_count.stat[0].scale = FE_SCALE_COUNTER;
c->pre_bit_count.stat[0].uvalue = t_pre_bit_count;
} else {
c->pre_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
c->pre_bit_count.stat[0].scale = FE_SCALE_COUNTER;
}
/*
* Start showing global count if at least one error count is
* available.
*/
if (post_ber_layers) {
/*
* At least one per-layer BER measure was read. We can now
* calculate the total BER
*
* Total Bit Error/Count is calculated as the sum of the
* bit errors on all active layers.
*/
c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
c->post_bit_error.stat[0].uvalue = t_post_bit_error;
c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
c->post_bit_count.stat[0].uvalue = t_post_bit_count;
} else {
c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
}
if (per_layers) {
/*
* At least one per-layer UCB measure was read. We can now
* calculate the total UCB
*
* Total block Error/Count is calculated as the sum of the
* block errors on all active layers.
*/
c->block_error.stat[0].scale = FE_SCALE_COUNTER;
c->block_error.stat[0].uvalue = t_block_error;
c->block_count.stat[0].scale = FE_SCALE_COUNTER;
c->block_count.stat[0].uvalue = t_block_count;
} else {
c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
c->block_count.stat[0].scale = FE_SCALE_COUNTER;
}
return rc;
}
/*
* The functions below are called via DVB callbacks, so they need to
* properly use the I2C gate control
*/
static int mb86a20s_initfe(struct dvb_frontend *fe)
{
struct mb86a20s_state *state = fe->demodulator_priv;
u64 pll;
u32 fclk;
int rc;
u8 regD5 = 1, reg71, reg09 = 0x3a;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
/* Initialize the frontend */
rc = mb86a20s_writeregdata(state, mb86a20s_init1);
if (rc < 0)
goto err;
if (!state->inversion)
reg09 |= 0x04;
rc = mb86a20s_writereg(state, 0x09, reg09);
if (rc < 0)
goto err;
if (!state->bw)
reg71 = 1;
else
reg71 = 0;
rc = mb86a20s_writereg(state, 0x39, reg71);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x71, state->bw);
if (rc < 0)
goto err;
if (state->subchannel) {
rc = mb86a20s_writereg(state, 0x44, state->subchannel);
if (rc < 0)
goto err;
}
fclk = state->config->fclk;
if (!fclk)
fclk = 32571428;
/* Adjust IF frequency to match tuner */
if (fe->ops.tuner_ops.get_if_frequency)
fe->ops.tuner_ops.get_if_frequency(fe, &state->if_freq);
if (!state->if_freq)
state->if_freq = 3300000;
pll = (((u64)1) << 34) * state->if_freq;
do_div(pll, 63 * fclk);
pll = (1 << 25) - pll;
rc = mb86a20s_writereg(state, 0x28, 0x2a);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x29, (pll >> 16) & 0xff);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x2a, (pll >> 8) & 0xff);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x2b, pll & 0xff);
if (rc < 0)
goto err;
dev_dbg(&state->i2c->dev, "%s: fclk=%d, IF=%d, clock reg=0x%06llx\n",
__func__, fclk, state->if_freq, (long long)pll);
/* pll = freq[Hz] * 2^24/10^6 / 16.285714286 */
pll = state->if_freq * 1677721600L;
do_div(pll, 1628571429L);
rc = mb86a20s_writereg(state, 0x28, 0x20);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x29, (pll >> 16) & 0xff);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x2a, (pll >> 8) & 0xff);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x2b, pll & 0xff);
if (rc < 0)
goto err;
dev_dbg(&state->i2c->dev, "%s: IF=%d, IF reg=0x%06llx\n",
__func__, state->if_freq, (long long)pll);
if (!state->config->is_serial)
regD5 &= ~1;
rc = mb86a20s_writereg(state, 0x50, 0xd5);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x51, regD5);
if (rc < 0)
goto err;
rc = mb86a20s_writeregdata(state, mb86a20s_init2);
if (rc < 0)
goto err;
err:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if (rc < 0) {
state->need_init = true;
dev_info(&state->i2c->dev,
"mb86a20s: Init failed. Will try again later\n");
} else {
state->need_init = false;
dev_dbg(&state->i2c->dev, "Initialization succeeded.\n");
}
return rc;
}
static int mb86a20s_set_frontend(struct dvb_frontend *fe)
{
struct mb86a20s_state *state = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int rc, if_freq;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
if (!c->isdbt_layer_enabled)
c->isdbt_layer_enabled = 7;
if (c->isdbt_layer_enabled == 1)
state->bw = MB86A20S_1SEG;
else if (c->isdbt_partial_reception)
state->bw = MB86A20S_13SEG_PARTIAL;
else
state->bw = MB86A20S_13SEG;
if (c->inversion == INVERSION_ON)
state->inversion = true;
else
state->inversion = false;
if (!c->isdbt_sb_mode) {
state->subchannel = 0;
} else {
if (c->isdbt_sb_subchannel >= ARRAY_SIZE(mb86a20s_subchannel))
c->isdbt_sb_subchannel = 0;
state->subchannel = mb86a20s_subchannel[c->isdbt_sb_subchannel];
}
/*
* Gate should already be opened, but it doesn't hurt to
* double-check
*/
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
fe->ops.tuner_ops.set_params(fe);
if (fe->ops.tuner_ops.get_if_frequency)
fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
/*
* Make it more reliable: if, for some reason, the initial
* device initialization doesn't happen, initialize it when
* a SBTVD parameters are adjusted.
*
* Unfortunately, due to a hard to track bug at tda829x/tda18271,
* the agc callback logic is not called during DVB attach time,
* causing mb86a20s to not be initialized with Kworld SBTVD.
* So, this hack is needed, in order to make Kworld SBTVD to work.
*
* It is also needed to change the IF after the initial init.
*
* HACK: Always init the frontend when set_frontend is called:
* it was noticed that, on some devices, it fails to lock on a
* different channel. So, it is better to reset everything, even
* wasting some time, than to loose channel lock.
*/
mb86a20s_initfe(fe);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
rc = mb86a20s_writeregdata(state, mb86a20s_reset_reception);
mb86a20s_reset_counters(fe);
mb86a20s_stats_not_ready(fe);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
return rc;
}
static int mb86a20s_read_status_and_stats(struct dvb_frontend *fe,
enum fe_status *status)
{
struct mb86a20s_state *state = fe->demodulator_priv;
int rc, status_nr;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
/* Get lock */
status_nr = mb86a20s_read_status(fe, status);
if (status_nr < 7) {
mb86a20s_stats_not_ready(fe);
mb86a20s_reset_frontend_cache(fe);
}
if (status_nr < 0) {
dev_err(&state->i2c->dev,
"%s: Can't read frontend lock status\n", __func__);
rc = status_nr;
goto error;
}
/* Get signal strength */
rc = mb86a20s_read_signal_strength(fe);
if (rc < 0) {
dev_err(&state->i2c->dev,
"%s: Can't reset VBER registers.\n", __func__);
mb86a20s_stats_not_ready(fe);
mb86a20s_reset_frontend_cache(fe);
rc = 0; /* Status is OK */
goto error;
}
if (status_nr >= 7) {
/* Get TMCC info*/
rc = mb86a20s_get_frontend(fe);
if (rc < 0) {
dev_err(&state->i2c->dev,
"%s: Can't get FE TMCC data.\n", __func__);
rc = 0; /* Status is OK */
goto error;
}
/* Get statistics */
rc = mb86a20s_get_stats(fe, status_nr);
if (rc < 0 && rc != -EBUSY) {
dev_err(&state->i2c->dev,
"%s: Can't get FE statistics.\n", __func__);
rc = 0;
goto error;
}
rc = 0; /* Don't return EBUSY to userspace */
}
goto ok;
error:
mb86a20s_stats_not_ready(fe);
ok:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
return rc;
}
static int mb86a20s_read_signal_strength_from_cache(struct dvb_frontend *fe,
u16 *strength)
{
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
*strength = c->strength.stat[0].uvalue;
return 0;
}
static int mb86a20s_tune(struct dvb_frontend *fe,
bool re_tune,
unsigned int mode_flags,
unsigned int *delay,
enum fe_status *status)
{
struct mb86a20s_state *state = fe->demodulator_priv;
int rc = 0;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
if (re_tune)
rc = mb86a20s_set_frontend(fe);
if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
mb86a20s_read_status_and_stats(fe, status);
return rc;
}
static void mb86a20s_release(struct dvb_frontend *fe)
{
struct mb86a20s_state *state = fe->demodulator_priv;
dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
kfree(state);
}
static enum dvbfe_algo mb86a20s_get_frontend_algo(struct dvb_frontend *fe)
{
return DVBFE_ALGO_HW;
}
static const struct dvb_frontend_ops mb86a20s_ops;
struct dvb_frontend *mb86a20s_attach(const struct mb86a20s_config *config,
struct i2c_adapter *i2c)
{
struct mb86a20s_state *state;
u8 rev;
dev_dbg(&i2c->dev, "%s called.\n", __func__);
/* allocate memory for the internal state */
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
/* setup the state */
state->config = config;
state->i2c = i2c;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &mb86a20s_ops,
sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
/* Check if it is a mb86a20s frontend */
rev = mb86a20s_readreg(state, 0);
if (rev != 0x13) {
kfree(state);
dev_dbg(&i2c->dev,
"Frontend revision %d is unknown - aborting.\n",
rev);
return NULL;
}
dev_info(&i2c->dev, "Detected a Fujitsu mb86a20s frontend\n");
return &state->frontend;
}
EXPORT_SYMBOL(mb86a20s_attach);
static const struct dvb_frontend_ops mb86a20s_ops = {
.delsys = { SYS_ISDBT },
/* Use dib8000 values per default */
.info = {
.name = "Fujitsu mb86A20s",
.caps = FE_CAN_RECOVER |
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_TRANSMISSION_MODE_AUTO | FE_CAN_QAM_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
/* Actually, those values depend on the used tuner */
.frequency_min_hz = 45 * MHz,
.frequency_max_hz = 864 * MHz,
.frequency_stepsize_hz = 62500,
},
.release = mb86a20s_release,
.init = mb86a20s_initfe,
.set_frontend = mb86a20s_set_frontend,
.read_status = mb86a20s_read_status_and_stats,
.read_signal_strength = mb86a20s_read_signal_strength_from_cache,
.tune = mb86a20s_tune,
.get_frontend_algo = mb86a20s_get_frontend_algo,
};
MODULE_DESCRIPTION("DVB Frontend module for Fujitsu mb86A20s hardware");
MODULE_AUTHOR("Mauro Carvalho Chehab");
MODULE_LICENSE("GPL");
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