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linux-next/drivers/media/dvb-frontends/nxt6000.c
Thomas Gleixner 74ba9207e1 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 
Based on 1 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
  675 mass ave cambridge ma 02139 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 441 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Reviewed-by: Richard Fontana <rfontana@redhat.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/20190520071858.739733335@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-24 17:36:45 +02:00

625 lines
15 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
NxtWave Communications - NXT6000 demodulator driver
Copyright (C) 2002-2003 Florian Schirmer <jolt@tuxbox.org>
Copyright (C) 2003 Paul Andreassen <paul@andreassen.com.au>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <media/dvb_frontend.h>
#include "nxt6000_priv.h"
#include "nxt6000.h"
struct nxt6000_state {
struct i2c_adapter* i2c;
/* configuration settings */
const struct nxt6000_config* config;
struct dvb_frontend frontend;
};
static int debug;
#define dprintk(fmt, arg...) do { \
if (debug) \
printk(KERN_DEBUG pr_fmt("%s: " fmt), \
__func__, ##arg); \
} while (0)
static int nxt6000_writereg(struct nxt6000_state* state, u8 reg, u8 data)
{
u8 buf[] = { reg, data };
struct i2c_msg msg = {.addr = state->config->demod_address,.flags = 0,.buf = buf,.len = 2 };
int ret;
if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1)
dprintk("nxt6000: nxt6000_write error (reg: 0x%02X, data: 0x%02X, ret: %d)\n", reg, data, ret);
return (ret != 1) ? -EIO : 0;
}
static u8 nxt6000_readreg(struct nxt6000_state* state, u8 reg)
{
int ret;
u8 b0[] = { reg };
u8 b1[] = { 0 };
struct i2c_msg msgs[] = {
{.addr = state->config->demod_address,.flags = 0,.buf = b0,.len = 1},
{.addr = state->config->demod_address,.flags = I2C_M_RD,.buf = b1,.len = 1}
};
ret = i2c_transfer(state->i2c, msgs, 2);
if (ret != 2)
dprintk("nxt6000: nxt6000_read error (reg: 0x%02X, ret: %d)\n", reg, ret);
return b1[0];
}
static void nxt6000_reset(struct nxt6000_state* state)
{
u8 val;
val = nxt6000_readreg(state, OFDM_COR_CTL);
nxt6000_writereg(state, OFDM_COR_CTL, val & ~COREACT);
nxt6000_writereg(state, OFDM_COR_CTL, val | COREACT);
}
static int nxt6000_set_bandwidth(struct nxt6000_state *state, u32 bandwidth)
{
u16 nominal_rate;
int result;
switch (bandwidth) {
case 6000000:
nominal_rate = 0x55B7;
break;
case 7000000:
nominal_rate = 0x6400;
break;
case 8000000:
nominal_rate = 0x7249;
break;
default:
return -EINVAL;
}
if ((result = nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, nominal_rate & 0xFF)) < 0)
return result;
return nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, (nominal_rate >> 8) & 0xFF);
}
static int nxt6000_set_guard_interval(struct nxt6000_state *state,
enum fe_guard_interval guard_interval)
{
switch (guard_interval) {
case GUARD_INTERVAL_1_32:
return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x00 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
case GUARD_INTERVAL_1_16:
return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x01 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
case GUARD_INTERVAL_AUTO:
case GUARD_INTERVAL_1_8:
return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x02 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
case GUARD_INTERVAL_1_4:
return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x03 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
default:
return -EINVAL;
}
}
static int nxt6000_set_inversion(struct nxt6000_state *state,
enum fe_spectral_inversion inversion)
{
switch (inversion) {
case INVERSION_OFF:
return nxt6000_writereg(state, OFDM_ITB_CTL, 0x00);
case INVERSION_ON:
return nxt6000_writereg(state, OFDM_ITB_CTL, ITBINV);
default:
return -EINVAL;
}
}
static int
nxt6000_set_transmission_mode(struct nxt6000_state *state,
enum fe_transmit_mode transmission_mode)
{
int result;
switch (transmission_mode) {
case TRANSMISSION_MODE_2K:
if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x00 | (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
return result;
return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x00 << 2) | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
case TRANSMISSION_MODE_8K:
case TRANSMISSION_MODE_AUTO:
if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x02 | (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
return result;
return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x01 << 2) | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
default:
return -EINVAL;
}
}
static void nxt6000_setup(struct dvb_frontend* fe)
{
struct nxt6000_state* state = fe->demodulator_priv;
nxt6000_writereg(state, RS_COR_SYNC_PARAM, SYNC_PARAM);
nxt6000_writereg(state, BER_CTRL, /*(1 << 2) | */ (0x01 << 1) | 0x01);
nxt6000_writereg(state, VIT_BERTIME_2, 0x00); // BER Timer = 0x000200 * 256 = 131072 bits
nxt6000_writereg(state, VIT_BERTIME_1, 0x02); //
nxt6000_writereg(state, VIT_BERTIME_0, 0x00); //
nxt6000_writereg(state, VIT_COR_INTEN, 0x98); // Enable BER interrupts
nxt6000_writereg(state, VIT_COR_CTL, 0x82); // Enable BER measurement
nxt6000_writereg(state, VIT_COR_CTL, VIT_COR_RESYNC | 0x02 );
nxt6000_writereg(state, OFDM_COR_CTL, (0x01 << 5) | (nxt6000_readreg(state, OFDM_COR_CTL) & 0x0F));
nxt6000_writereg(state, OFDM_COR_MODEGUARD, FORCEMODE8K | 0x02);
nxt6000_writereg(state, OFDM_AGC_CTL, AGCLAST | INITIAL_AGC_BW);
nxt6000_writereg(state, OFDM_ITB_FREQ_1, 0x06);
nxt6000_writereg(state, OFDM_ITB_FREQ_2, 0x31);
nxt6000_writereg(state, OFDM_CAS_CTL, (0x01 << 7) | (0x02 << 3) | 0x04);
nxt6000_writereg(state, CAS_FREQ, 0xBB); /* CHECKME */
nxt6000_writereg(state, OFDM_SYR_CTL, 1 << 2);
nxt6000_writereg(state, OFDM_PPM_CTL_1, PPM256);
nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, 0x49);
nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, 0x72);
nxt6000_writereg(state, ANALOG_CONTROL_0, 1 << 5);
nxt6000_writereg(state, EN_DMD_RACQ, (1 << 7) | (3 << 4) | 2);
nxt6000_writereg(state, DIAG_CONFIG, TB_SET);
if (state->config->clock_inversion)
nxt6000_writereg(state, SUB_DIAG_MODE_SEL, CLKINVERSION);
else
nxt6000_writereg(state, SUB_DIAG_MODE_SEL, 0);
nxt6000_writereg(state, TS_FORMAT, 0);
}
static void nxt6000_dump_status(struct nxt6000_state *state)
{
u8 val;
#if 0
pr_info("RS_COR_STAT: 0x%02X\n",
nxt6000_readreg(fe, RS_COR_STAT));
pr_info("VIT_SYNC_STATUS: 0x%02X\n",
nxt6000_readreg(fe, VIT_SYNC_STATUS));
pr_info("OFDM_COR_STAT: 0x%02X\n",
nxt6000_readreg(fe, OFDM_COR_STAT));
pr_info("OFDM_SYR_STAT: 0x%02X\n",
nxt6000_readreg(fe, OFDM_SYR_STAT));
pr_info("OFDM_TPS_RCVD_1: 0x%02X\n",
nxt6000_readreg(fe, OFDM_TPS_RCVD_1));
pr_info("OFDM_TPS_RCVD_2: 0x%02X\n",
nxt6000_readreg(fe, OFDM_TPS_RCVD_2));
pr_info("OFDM_TPS_RCVD_3: 0x%02X\n",
nxt6000_readreg(fe, OFDM_TPS_RCVD_3));
pr_info("OFDM_TPS_RCVD_4: 0x%02X\n",
nxt6000_readreg(fe, OFDM_TPS_RCVD_4));
pr_info("OFDM_TPS_RESERVED_1: 0x%02X\n",
nxt6000_readreg(fe, OFDM_TPS_RESERVED_1));
pr_info("OFDM_TPS_RESERVED_2: 0x%02X\n",
nxt6000_readreg(fe, OFDM_TPS_RESERVED_2));
#endif
pr_info("NXT6000 status:");
val = nxt6000_readreg(state, RS_COR_STAT);
pr_cont(" DATA DESCR LOCK: %d,", val & 0x01);
pr_cont(" DATA SYNC LOCK: %d,", (val >> 1) & 0x01);
val = nxt6000_readreg(state, VIT_SYNC_STATUS);
pr_cont(" VITERBI LOCK: %d,", (val >> 7) & 0x01);
switch ((val >> 4) & 0x07) {
case 0x00:
pr_cont(" VITERBI CODERATE: 1/2,");
break;
case 0x01:
pr_cont(" VITERBI CODERATE: 2/3,");
break;
case 0x02:
pr_cont(" VITERBI CODERATE: 3/4,");
break;
case 0x03:
pr_cont(" VITERBI CODERATE: 5/6,");
break;
case 0x04:
pr_cont(" VITERBI CODERATE: 7/8,");
break;
default:
pr_cont(" VITERBI CODERATE: Reserved,");
}
val = nxt6000_readreg(state, OFDM_COR_STAT);
pr_cont(" CHCTrack: %d,", (val >> 7) & 0x01);
pr_cont(" TPSLock: %d,", (val >> 6) & 0x01);
pr_cont(" SYRLock: %d,", (val >> 5) & 0x01);
pr_cont(" AGCLock: %d,", (val >> 4) & 0x01);
switch (val & 0x0F) {
case 0x00:
pr_cont(" CoreState: IDLE,");
break;
case 0x02:
pr_cont(" CoreState: WAIT_AGC,");
break;
case 0x03:
pr_cont(" CoreState: WAIT_SYR,");
break;
case 0x04:
pr_cont(" CoreState: WAIT_PPM,");
break;
case 0x01:
pr_cont(" CoreState: WAIT_TRL,");
break;
case 0x05:
pr_cont(" CoreState: WAIT_TPS,");
break;
case 0x06:
pr_cont(" CoreState: MONITOR_TPS,");
break;
default:
pr_cont(" CoreState: Reserved,");
}
val = nxt6000_readreg(state, OFDM_SYR_STAT);
pr_cont(" SYRLock: %d,", (val >> 4) & 0x01);
pr_cont(" SYRMode: %s,", (val >> 2) & 0x01 ? "8K" : "2K");
switch ((val >> 4) & 0x03) {
case 0x00:
pr_cont(" SYRGuard: 1/32,");
break;
case 0x01:
pr_cont(" SYRGuard: 1/16,");
break;
case 0x02:
pr_cont(" SYRGuard: 1/8,");
break;
case 0x03:
pr_cont(" SYRGuard: 1/4,");
break;
}
val = nxt6000_readreg(state, OFDM_TPS_RCVD_3);
switch ((val >> 4) & 0x07) {
case 0x00:
pr_cont(" TPSLP: 1/2,");
break;
case 0x01:
pr_cont(" TPSLP: 2/3,");
break;
case 0x02:
pr_cont(" TPSLP: 3/4,");
break;
case 0x03:
pr_cont(" TPSLP: 5/6,");
break;
case 0x04:
pr_cont(" TPSLP: 7/8,");
break;
default:
pr_cont(" TPSLP: Reserved,");
}
switch (val & 0x07) {
case 0x00:
pr_cont(" TPSHP: 1/2,");
break;
case 0x01:
pr_cont(" TPSHP: 2/3,");
break;
case 0x02:
pr_cont(" TPSHP: 3/4,");
break;
case 0x03:
pr_cont(" TPSHP: 5/6,");
break;
case 0x04:
pr_cont(" TPSHP: 7/8,");
break;
default:
pr_cont(" TPSHP: Reserved,");
}
val = nxt6000_readreg(state, OFDM_TPS_RCVD_4);
pr_cont(" TPSMode: %s,", val & 0x01 ? "8K" : "2K");
switch ((val >> 4) & 0x03) {
case 0x00:
pr_cont(" TPSGuard: 1/32,");
break;
case 0x01:
pr_cont(" TPSGuard: 1/16,");
break;
case 0x02:
pr_cont(" TPSGuard: 1/8,");
break;
case 0x03:
pr_cont(" TPSGuard: 1/4,");
break;
}
/* Strange magic required to gain access to RF_AGC_STATUS */
nxt6000_readreg(state, RF_AGC_VAL_1);
val = nxt6000_readreg(state, RF_AGC_STATUS);
val = nxt6000_readreg(state, RF_AGC_STATUS);
pr_cont(" RF AGC LOCK: %d,", (val >> 4) & 0x01);
pr_cont("\n");
}
static int nxt6000_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
u8 core_status;
struct nxt6000_state* state = fe->demodulator_priv;
*status = 0;
core_status = nxt6000_readreg(state, OFDM_COR_STAT);
if (core_status & AGCLOCKED)
*status |= FE_HAS_SIGNAL;
if (nxt6000_readreg(state, OFDM_SYR_STAT) & GI14_SYR_LOCK)
*status |= FE_HAS_CARRIER;
if (nxt6000_readreg(state, VIT_SYNC_STATUS) & VITINSYNC)
*status |= FE_HAS_VITERBI;
if (nxt6000_readreg(state, RS_COR_STAT) & RSCORESTATUS)
*status |= FE_HAS_SYNC;
if ((core_status & TPSLOCKED) && (*status == (FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)))
*status |= FE_HAS_LOCK;
if (debug)
nxt6000_dump_status(state);
return 0;
}
static int nxt6000_init(struct dvb_frontend* fe)
{
struct nxt6000_state* state = fe->demodulator_priv;
nxt6000_reset(state);
nxt6000_setup(fe);
return 0;
}
static int nxt6000_set_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct nxt6000_state* state = fe->demodulator_priv;
int result;
if (fe->ops.tuner_ops.set_params) {
fe->ops.tuner_ops.set_params(fe);
if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
}
result = nxt6000_set_bandwidth(state, p->bandwidth_hz);
if (result < 0)
return result;
result = nxt6000_set_guard_interval(state, p->guard_interval);
if (result < 0)
return result;
result = nxt6000_set_transmission_mode(state, p->transmission_mode);
if (result < 0)
return result;
result = nxt6000_set_inversion(state, p->inversion);
if (result < 0)
return result;
msleep(500);
return 0;
}
static void nxt6000_release(struct dvb_frontend* fe)
{
struct nxt6000_state* state = fe->demodulator_priv;
kfree(state);
}
static int nxt6000_read_snr(struct dvb_frontend* fe, u16* snr)
{
struct nxt6000_state* state = fe->demodulator_priv;
*snr = nxt6000_readreg( state, OFDM_CHC_SNR) / 8;
return 0;
}
static int nxt6000_read_ber(struct dvb_frontend* fe, u32* ber)
{
struct nxt6000_state* state = fe->demodulator_priv;
nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18 );
*ber = (nxt6000_readreg( state, VIT_BER_1 ) << 8 ) |
nxt6000_readreg( state, VIT_BER_0 );
nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18); // Clear BER Done interrupts
return 0;
}
static int nxt6000_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
{
struct nxt6000_state* state = fe->demodulator_priv;
*signal_strength = (short) (511 -
(nxt6000_readreg(state, AGC_GAIN_1) +
((nxt6000_readreg(state, AGC_GAIN_2) & 0x03) << 8)));
return 0;
}
static int nxt6000_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
tune->min_delay_ms = 500;
return 0;
}
static int nxt6000_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
{
struct nxt6000_state* state = fe->demodulator_priv;
if (enable) {
return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x01);
} else {
return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x00);
}
}
static const struct dvb_frontend_ops nxt6000_ops;
struct dvb_frontend* nxt6000_attach(const struct nxt6000_config* config,
struct i2c_adapter* i2c)
{
struct nxt6000_state* state = NULL;
/* allocate memory for the internal state */
state = kzalloc(sizeof(struct nxt6000_state), GFP_KERNEL);
if (state == NULL) goto error;
/* setup the state */
state->config = config;
state->i2c = i2c;
/* check if the demod is there */
if (nxt6000_readreg(state, OFDM_MSC_REV) != NXT6000ASICDEVICE) goto error;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &nxt6000_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
error:
kfree(state);
return NULL;
}
static const struct dvb_frontend_ops nxt6000_ops = {
.delsys = { SYS_DVBT },
.info = {
.name = "NxtWave NXT6000 DVB-T",
.frequency_min_hz = 0,
.frequency_max_hz = 863250 * kHz,
.frequency_stepsize_hz = 62500,
/*.frequency_tolerance = *//* FIXME: 12% of SR */
.symbol_rate_min = 0, /* FIXME */
.symbol_rate_max = 9360000, /* FIXME */
.symbol_rate_tolerance = 4000,
.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
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,
},
.release = nxt6000_release,
.init = nxt6000_init,
.i2c_gate_ctrl = nxt6000_i2c_gate_ctrl,
.get_tune_settings = nxt6000_fe_get_tune_settings,
.set_frontend = nxt6000_set_frontend,
.read_status = nxt6000_read_status,
.read_ber = nxt6000_read_ber,
.read_signal_strength = nxt6000_read_signal_strength,
.read_snr = nxt6000_read_snr,
};
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
MODULE_DESCRIPTION("NxtWave NXT6000 DVB-T demodulator driver");
MODULE_AUTHOR("Florian Schirmer");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(nxt6000_attach);
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