625 lines
15 KiB
C
625 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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NxtWave Communications - NXT6000 demodulator driver
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Copyright (C) 2002-2003 Florian Schirmer <jolt@tuxbox.org>
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Copyright (C) 2003 Paul Andreassen <paul@andreassen.com.au>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <media/dvb_frontend.h>
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#include "nxt6000_priv.h"
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#include "nxt6000.h"
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struct nxt6000_state {
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struct i2c_adapter* i2c;
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/* configuration settings */
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const struct nxt6000_config* config;
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struct dvb_frontend frontend;
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};
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static int debug;
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#define dprintk(fmt, arg...) do { \
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if (debug) \
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printk(KERN_DEBUG pr_fmt("%s: " fmt), \
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__func__, ##arg); \
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} while (0)
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static int nxt6000_writereg(struct nxt6000_state* state, u8 reg, u8 data)
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{
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u8 buf[] = { reg, data };
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struct i2c_msg msg = {.addr = state->config->demod_address,.flags = 0,.buf = buf,.len = 2 };
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int ret;
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if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1)
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dprintk("nxt6000: nxt6000_write error (reg: 0x%02X, data: 0x%02X, ret: %d)\n", reg, data, ret);
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return (ret != 1) ? -EIO : 0;
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}
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static u8 nxt6000_readreg(struct nxt6000_state* state, u8 reg)
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{
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int ret;
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u8 b0[] = { reg };
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u8 b1[] = { 0 };
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struct i2c_msg msgs[] = {
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{.addr = state->config->demod_address,.flags = 0,.buf = b0,.len = 1},
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{.addr = state->config->demod_address,.flags = I2C_M_RD,.buf = b1,.len = 1}
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};
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ret = i2c_transfer(state->i2c, msgs, 2);
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if (ret != 2)
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dprintk("nxt6000: nxt6000_read error (reg: 0x%02X, ret: %d)\n", reg, ret);
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return b1[0];
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}
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static void nxt6000_reset(struct nxt6000_state* state)
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{
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u8 val;
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val = nxt6000_readreg(state, OFDM_COR_CTL);
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nxt6000_writereg(state, OFDM_COR_CTL, val & ~COREACT);
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nxt6000_writereg(state, OFDM_COR_CTL, val | COREACT);
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}
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static int nxt6000_set_bandwidth(struct nxt6000_state *state, u32 bandwidth)
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{
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u16 nominal_rate;
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int result;
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switch (bandwidth) {
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case 6000000:
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nominal_rate = 0x55B7;
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break;
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case 7000000:
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nominal_rate = 0x6400;
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break;
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case 8000000:
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nominal_rate = 0x7249;
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break;
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default:
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return -EINVAL;
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}
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if ((result = nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, nominal_rate & 0xFF)) < 0)
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return result;
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return nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, (nominal_rate >> 8) & 0xFF);
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}
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static int nxt6000_set_guard_interval(struct nxt6000_state *state,
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enum fe_guard_interval guard_interval)
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{
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switch (guard_interval) {
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case GUARD_INTERVAL_1_32:
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return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x00 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
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case GUARD_INTERVAL_1_16:
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return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x01 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
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case GUARD_INTERVAL_AUTO:
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case GUARD_INTERVAL_1_8:
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return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x02 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
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case GUARD_INTERVAL_1_4:
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return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x03 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
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default:
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return -EINVAL;
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}
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}
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static int nxt6000_set_inversion(struct nxt6000_state *state,
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enum fe_spectral_inversion inversion)
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{
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switch (inversion) {
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case INVERSION_OFF:
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return nxt6000_writereg(state, OFDM_ITB_CTL, 0x00);
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case INVERSION_ON:
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return nxt6000_writereg(state, OFDM_ITB_CTL, ITBINV);
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default:
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return -EINVAL;
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}
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}
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static int
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nxt6000_set_transmission_mode(struct nxt6000_state *state,
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enum fe_transmit_mode transmission_mode)
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{
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int result;
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switch (transmission_mode) {
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case TRANSMISSION_MODE_2K:
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if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x00 | (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
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return result;
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return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x00 << 2) | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
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case TRANSMISSION_MODE_8K:
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case TRANSMISSION_MODE_AUTO:
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if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x02 | (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
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return result;
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return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x01 << 2) | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
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default:
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return -EINVAL;
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}
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}
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static void nxt6000_setup(struct dvb_frontend* fe)
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{
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struct nxt6000_state* state = fe->demodulator_priv;
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nxt6000_writereg(state, RS_COR_SYNC_PARAM, SYNC_PARAM);
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nxt6000_writereg(state, BER_CTRL, /*(1 << 2) | */ (0x01 << 1) | 0x01);
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nxt6000_writereg(state, VIT_BERTIME_2, 0x00); // BER Timer = 0x000200 * 256 = 131072 bits
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nxt6000_writereg(state, VIT_BERTIME_1, 0x02); //
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nxt6000_writereg(state, VIT_BERTIME_0, 0x00); //
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nxt6000_writereg(state, VIT_COR_INTEN, 0x98); // Enable BER interrupts
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nxt6000_writereg(state, VIT_COR_CTL, 0x82); // Enable BER measurement
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nxt6000_writereg(state, VIT_COR_CTL, VIT_COR_RESYNC | 0x02 );
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nxt6000_writereg(state, OFDM_COR_CTL, (0x01 << 5) | (nxt6000_readreg(state, OFDM_COR_CTL) & 0x0F));
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nxt6000_writereg(state, OFDM_COR_MODEGUARD, FORCEMODE8K | 0x02);
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nxt6000_writereg(state, OFDM_AGC_CTL, AGCLAST | INITIAL_AGC_BW);
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nxt6000_writereg(state, OFDM_ITB_FREQ_1, 0x06);
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nxt6000_writereg(state, OFDM_ITB_FREQ_2, 0x31);
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nxt6000_writereg(state, OFDM_CAS_CTL, (0x01 << 7) | (0x02 << 3) | 0x04);
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nxt6000_writereg(state, CAS_FREQ, 0xBB); /* CHECKME */
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nxt6000_writereg(state, OFDM_SYR_CTL, 1 << 2);
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nxt6000_writereg(state, OFDM_PPM_CTL_1, PPM256);
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nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, 0x49);
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nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, 0x72);
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nxt6000_writereg(state, ANALOG_CONTROL_0, 1 << 5);
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nxt6000_writereg(state, EN_DMD_RACQ, (1 << 7) | (3 << 4) | 2);
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nxt6000_writereg(state, DIAG_CONFIG, TB_SET);
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if (state->config->clock_inversion)
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nxt6000_writereg(state, SUB_DIAG_MODE_SEL, CLKINVERSION);
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else
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nxt6000_writereg(state, SUB_DIAG_MODE_SEL, 0);
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nxt6000_writereg(state, TS_FORMAT, 0);
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}
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static void nxt6000_dump_status(struct nxt6000_state *state)
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{
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u8 val;
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#if 0
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pr_info("RS_COR_STAT: 0x%02X\n",
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nxt6000_readreg(fe, RS_COR_STAT));
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pr_info("VIT_SYNC_STATUS: 0x%02X\n",
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nxt6000_readreg(fe, VIT_SYNC_STATUS));
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pr_info("OFDM_COR_STAT: 0x%02X\n",
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nxt6000_readreg(fe, OFDM_COR_STAT));
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pr_info("OFDM_SYR_STAT: 0x%02X\n",
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nxt6000_readreg(fe, OFDM_SYR_STAT));
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pr_info("OFDM_TPS_RCVD_1: 0x%02X\n",
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nxt6000_readreg(fe, OFDM_TPS_RCVD_1));
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pr_info("OFDM_TPS_RCVD_2: 0x%02X\n",
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nxt6000_readreg(fe, OFDM_TPS_RCVD_2));
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pr_info("OFDM_TPS_RCVD_3: 0x%02X\n",
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nxt6000_readreg(fe, OFDM_TPS_RCVD_3));
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pr_info("OFDM_TPS_RCVD_4: 0x%02X\n",
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nxt6000_readreg(fe, OFDM_TPS_RCVD_4));
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pr_info("OFDM_TPS_RESERVED_1: 0x%02X\n",
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nxt6000_readreg(fe, OFDM_TPS_RESERVED_1));
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pr_info("OFDM_TPS_RESERVED_2: 0x%02X\n",
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nxt6000_readreg(fe, OFDM_TPS_RESERVED_2));
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#endif
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pr_info("NXT6000 status:");
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val = nxt6000_readreg(state, RS_COR_STAT);
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pr_cont(" DATA DESCR LOCK: %d,", val & 0x01);
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pr_cont(" DATA SYNC LOCK: %d,", (val >> 1) & 0x01);
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val = nxt6000_readreg(state, VIT_SYNC_STATUS);
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pr_cont(" VITERBI LOCK: %d,", (val >> 7) & 0x01);
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switch ((val >> 4) & 0x07) {
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case 0x00:
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pr_cont(" VITERBI CODERATE: 1/2,");
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break;
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case 0x01:
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pr_cont(" VITERBI CODERATE: 2/3,");
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break;
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case 0x02:
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pr_cont(" VITERBI CODERATE: 3/4,");
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break;
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case 0x03:
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pr_cont(" VITERBI CODERATE: 5/6,");
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break;
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case 0x04:
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pr_cont(" VITERBI CODERATE: 7/8,");
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break;
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default:
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pr_cont(" VITERBI CODERATE: Reserved,");
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}
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val = nxt6000_readreg(state, OFDM_COR_STAT);
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pr_cont(" CHCTrack: %d,", (val >> 7) & 0x01);
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pr_cont(" TPSLock: %d,", (val >> 6) & 0x01);
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pr_cont(" SYRLock: %d,", (val >> 5) & 0x01);
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pr_cont(" AGCLock: %d,", (val >> 4) & 0x01);
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switch (val & 0x0F) {
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case 0x00:
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pr_cont(" CoreState: IDLE,");
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break;
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case 0x02:
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pr_cont(" CoreState: WAIT_AGC,");
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break;
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case 0x03:
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pr_cont(" CoreState: WAIT_SYR,");
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break;
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case 0x04:
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pr_cont(" CoreState: WAIT_PPM,");
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break;
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case 0x01:
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pr_cont(" CoreState: WAIT_TRL,");
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break;
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case 0x05:
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pr_cont(" CoreState: WAIT_TPS,");
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break;
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case 0x06:
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pr_cont(" CoreState: MONITOR_TPS,");
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break;
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default:
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pr_cont(" CoreState: Reserved,");
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}
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val = nxt6000_readreg(state, OFDM_SYR_STAT);
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pr_cont(" SYRLock: %d,", (val >> 4) & 0x01);
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pr_cont(" SYRMode: %s,", (val >> 2) & 0x01 ? "8K" : "2K");
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switch ((val >> 4) & 0x03) {
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case 0x00:
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pr_cont(" SYRGuard: 1/32,");
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break;
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case 0x01:
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pr_cont(" SYRGuard: 1/16,");
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break;
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case 0x02:
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pr_cont(" SYRGuard: 1/8,");
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break;
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case 0x03:
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pr_cont(" SYRGuard: 1/4,");
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break;
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}
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val = nxt6000_readreg(state, OFDM_TPS_RCVD_3);
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switch ((val >> 4) & 0x07) {
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case 0x00:
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pr_cont(" TPSLP: 1/2,");
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break;
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case 0x01:
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pr_cont(" TPSLP: 2/3,");
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break;
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case 0x02:
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pr_cont(" TPSLP: 3/4,");
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break;
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case 0x03:
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pr_cont(" TPSLP: 5/6,");
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break;
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case 0x04:
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pr_cont(" TPSLP: 7/8,");
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break;
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default:
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pr_cont(" TPSLP: Reserved,");
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}
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switch (val & 0x07) {
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case 0x00:
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pr_cont(" TPSHP: 1/2,");
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break;
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case 0x01:
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pr_cont(" TPSHP: 2/3,");
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break;
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case 0x02:
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pr_cont(" TPSHP: 3/4,");
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break;
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case 0x03:
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pr_cont(" TPSHP: 5/6,");
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break;
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case 0x04:
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pr_cont(" TPSHP: 7/8,");
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break;
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default:
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pr_cont(" TPSHP: Reserved,");
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}
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val = nxt6000_readreg(state, OFDM_TPS_RCVD_4);
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pr_cont(" TPSMode: %s,", val & 0x01 ? "8K" : "2K");
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switch ((val >> 4) & 0x03) {
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case 0x00:
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pr_cont(" TPSGuard: 1/32,");
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break;
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case 0x01:
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pr_cont(" TPSGuard: 1/16,");
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break;
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case 0x02:
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pr_cont(" TPSGuard: 1/8,");
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break;
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case 0x03:
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pr_cont(" TPSGuard: 1/4,");
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break;
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}
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/* Strange magic required to gain access to RF_AGC_STATUS */
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nxt6000_readreg(state, RF_AGC_VAL_1);
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val = nxt6000_readreg(state, RF_AGC_STATUS);
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val = nxt6000_readreg(state, RF_AGC_STATUS);
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pr_cont(" RF AGC LOCK: %d,", (val >> 4) & 0x01);
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pr_cont("\n");
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}
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static int nxt6000_read_status(struct dvb_frontend *fe, enum fe_status *status)
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{
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u8 core_status;
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struct nxt6000_state* state = fe->demodulator_priv;
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*status = 0;
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core_status = nxt6000_readreg(state, OFDM_COR_STAT);
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if (core_status & AGCLOCKED)
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*status |= FE_HAS_SIGNAL;
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if (nxt6000_readreg(state, OFDM_SYR_STAT) & GI14_SYR_LOCK)
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*status |= FE_HAS_CARRIER;
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if (nxt6000_readreg(state, VIT_SYNC_STATUS) & VITINSYNC)
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*status |= FE_HAS_VITERBI;
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if (nxt6000_readreg(state, RS_COR_STAT) & RSCORESTATUS)
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*status |= FE_HAS_SYNC;
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if ((core_status & TPSLOCKED) && (*status == (FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)))
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*status |= FE_HAS_LOCK;
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if (debug)
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nxt6000_dump_status(state);
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return 0;
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}
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static int nxt6000_init(struct dvb_frontend* fe)
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{
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struct nxt6000_state* state = fe->demodulator_priv;
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nxt6000_reset(state);
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nxt6000_setup(fe);
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return 0;
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}
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static int nxt6000_set_frontend(struct dvb_frontend *fe)
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{
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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struct nxt6000_state* state = fe->demodulator_priv;
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int result;
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if (fe->ops.tuner_ops.set_params) {
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fe->ops.tuner_ops.set_params(fe);
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if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
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}
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result = nxt6000_set_bandwidth(state, p->bandwidth_hz);
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if (result < 0)
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return result;
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result = nxt6000_set_guard_interval(state, p->guard_interval);
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if (result < 0)
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return result;
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result = nxt6000_set_transmission_mode(state, p->transmission_mode);
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if (result < 0)
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return result;
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result = nxt6000_set_inversion(state, p->inversion);
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if (result < 0)
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return result;
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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);
|