diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/media/dvb-frontends/lgdt330x.c | 1007 |
1 files changed, 1007 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/lgdt330x.c b/drivers/media/dvb-frontends/lgdt330x.c new file mode 100644 index 000000000..cb07869ea --- /dev/null +++ b/drivers/media/dvb-frontends/lgdt330x.c @@ -0,0 +1,1007 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Support for LGDT3302 and LGDT3303 - VSB/QAM + * + * Copyright (C) 2005 Wilson Michaels <wilsonmichaels@earthlink.net> + */ + +/* + * NOTES ABOUT THIS DRIVER + * + * This Linux driver supports: + * DViCO FusionHDTV 3 Gold-Q + * DViCO FusionHDTV 3 Gold-T + * DViCO FusionHDTV 5 Gold + * DViCO FusionHDTV 5 Lite + * DViCO FusionHDTV 5 USB Gold + * Air2PC/AirStar 2 ATSC 3rd generation (HD5000) + * pcHDTV HD5500 + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/string.h> +#include <linux/slab.h> +#include <asm/byteorder.h> + +#include <media/dvb_frontend.h> +#include <media/dvb_math.h> +#include "lgdt330x_priv.h" +#include "lgdt330x.h" + +/* Use Equalizer Mean Squared Error instead of Phaser Tracker MSE */ +/* #define USE_EQMSE */ + +static int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off lgdt330x frontend debugging (default:off)."); + +#define dprintk(state, fmt, arg...) do { \ + if (debug) \ + dev_printk(KERN_DEBUG, &state->client->dev, fmt, ##arg);\ +} while (0) + +struct lgdt330x_state { + struct i2c_client *client; + + /* Configuration settings */ + struct lgdt330x_config config; + + struct dvb_frontend frontend; + + /* Demodulator private data */ + enum fe_modulation current_modulation; + u32 snr; /* Result of last SNR calculation */ + u16 ucblocks; + unsigned long last_stats_time; + + /* Tuner private data */ + u32 current_frequency; +}; + +static int i2c_write_demod_bytes(struct lgdt330x_state *state, + const u8 *buf, /* data bytes to send */ + int len /* number of bytes to send */) +{ + int i; + int err; + + for (i = 0; i < len - 1; i += 2) { + err = i2c_master_send(state->client, buf, 2); + if (err != 2) { + dev_warn(&state->client->dev, + "%s: error (addr %02x <- %02x, err = %i)\n", + __func__, buf[0], buf[1], err); + if (err < 0) + return err; + else + return -EREMOTEIO; + } + buf += 2; + } + return 0; +} + +/* + * This routine writes the register (reg) to the demod bus + * then reads the data returned for (len) bytes. + */ +static int i2c_read_demod_bytes(struct lgdt330x_state *state, + enum I2C_REG reg, u8 *buf, int len) +{ + u8 wr[] = { reg }; + struct i2c_msg msg[] = { + { + .addr = state->client->addr, + .flags = 0, + .buf = wr, + .len = 1 + }, { + .addr = state->client->addr, + .flags = I2C_M_RD, + .buf = buf, + .len = len + }, + }; + int ret; + + ret = i2c_transfer(state->client->adapter, msg, 2); + if (ret != 2) { + dev_warn(&state->client->dev, + "%s: addr 0x%02x select 0x%02x error (ret == %i)\n", + __func__, state->client->addr, reg, ret); + if (ret >= 0) + ret = -EIO; + } else { + ret = 0; + } + return ret; +} + +/* Software reset */ +static int lgdt3302_sw_reset(struct lgdt330x_state *state) +{ + u8 ret; + u8 reset[] = { + IRQ_MASK, + /* + * bit 6 is active low software reset + * bits 5-0 are 1 to mask interrupts + */ + 0x00 + }; + + ret = i2c_write_demod_bytes(state, + reset, sizeof(reset)); + if (ret == 0) { + /* force reset high (inactive) and unmask interrupts */ + reset[1] = 0x7f; + ret = i2c_write_demod_bytes(state, + reset, sizeof(reset)); + } + return ret; +} + +static int lgdt3303_sw_reset(struct lgdt330x_state *state) +{ + u8 ret; + u8 reset[] = { + 0x02, + 0x00 /* bit 0 is active low software reset */ + }; + + ret = i2c_write_demod_bytes(state, + reset, sizeof(reset)); + if (ret == 0) { + /* force reset high (inactive) */ + reset[1] = 0x01; + ret = i2c_write_demod_bytes(state, + reset, sizeof(reset)); + } + return ret; +} + +static int lgdt330x_sw_reset(struct lgdt330x_state *state) +{ + switch (state->config.demod_chip) { + case LGDT3302: + return lgdt3302_sw_reset(state); + case LGDT3303: + return lgdt3303_sw_reset(state); + default: + return -ENODEV; + } +} + +static int lgdt330x_init(struct dvb_frontend *fe) +{ + struct lgdt330x_state *state = fe->demodulator_priv; + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + char *chip_name; + int err; + /* + * Array of byte pairs <address, value> + * to initialize each different chip + */ + static const u8 lgdt3302_init_data[] = { + /* Use 50MHz param values from spec sheet since xtal is 50 */ + /* + * Change the value of NCOCTFV[25:0] of carrier + * recovery center frequency register + */ + VSB_CARRIER_FREQ0, 0x00, + VSB_CARRIER_FREQ1, 0x87, + VSB_CARRIER_FREQ2, 0x8e, + VSB_CARRIER_FREQ3, 0x01, + /* + * Change the TPCLK pin polarity + * data is valid on falling clock + */ + DEMUX_CONTROL, 0xfb, + /* + * Change the value of IFBW[11:0] of + * AGC IF/RF loop filter bandwidth register + */ + AGC_RF_BANDWIDTH0, 0x40, + AGC_RF_BANDWIDTH1, 0x93, + AGC_RF_BANDWIDTH2, 0x00, + /* + * Change the value of bit 6, 'nINAGCBY' and + * 'NSSEL[1:0] of ACG function control register 2 + */ + AGC_FUNC_CTRL2, 0xc6, + /* + * Change the value of bit 6 'RFFIX' + * of AGC function control register 3 + */ + AGC_FUNC_CTRL3, 0x40, + /* + * Set the value of 'INLVTHD' register 0x2a/0x2c + * to 0x7fe + */ + AGC_DELAY0, 0x07, + AGC_DELAY2, 0xfe, + /* + * Change the value of IAGCBW[15:8] + * of inner AGC loop filter bandwidth + */ + AGC_LOOP_BANDWIDTH0, 0x08, + AGC_LOOP_BANDWIDTH1, 0x9a + }; + static const u8 lgdt3303_init_data[] = { + 0x4c, 0x14 + }; + static const u8 flip_1_lgdt3303_init_data[] = { + 0x4c, 0x14, + 0x87, 0xf3 + }; + static const u8 flip_2_lgdt3303_init_data[] = { + 0x4c, 0x14, + 0x87, 0xda + }; + + /* + * Hardware reset is done using gpio[0] of cx23880x chip. + * I'd like to do it here, but don't know how to find chip address. + * cx88-cards.c arranges for the reset bit to be inactive (high). + * Maybe there needs to be a callable function in cx88-core or + * the caller of this function needs to do it. + */ + + switch (state->config.demod_chip) { + case LGDT3302: + chip_name = "LGDT3302"; + err = i2c_write_demod_bytes(state, lgdt3302_init_data, + sizeof(lgdt3302_init_data)); + break; + case LGDT3303: + chip_name = "LGDT3303"; + switch (state->config.clock_polarity_flip) { + case 2: + err = i2c_write_demod_bytes(state, + flip_2_lgdt3303_init_data, + sizeof(flip_2_lgdt3303_init_data)); + break; + case 1: + err = i2c_write_demod_bytes(state, + flip_1_lgdt3303_init_data, + sizeof(flip_1_lgdt3303_init_data)); + break; + case 0: + default: + err = i2c_write_demod_bytes(state, lgdt3303_init_data, + sizeof(lgdt3303_init_data)); + } + break; + default: + chip_name = "undefined"; + dev_warn(&state->client->dev, + "Only LGDT3302 and LGDT3303 are supported chips.\n"); + err = -ENODEV; + } + dprintk(state, "Initialized the %s chip\n", chip_name); + if (err < 0) + return err; + + p->cnr.len = 1; + p->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + p->block_error.len = 1; + p->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + p->block_count.len = 1; + p->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + state->last_stats_time = 0; + + return lgdt330x_sw_reset(state); +} + +static int lgdt330x_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) +{ + struct lgdt330x_state *state = fe->demodulator_priv; + + *ucblocks = state->ucblocks; + + return 0; +} + +static int lgdt330x_set_parameters(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + struct lgdt330x_state *state = fe->demodulator_priv; + /* + * Array of byte pairs <address, value> + * to initialize 8VSB for lgdt3303 chip 50 MHz IF + */ + static const u8 lgdt3303_8vsb_44_data[] = { + 0x04, 0x00, + 0x0d, 0x40, + 0x0e, 0x87, + 0x0f, 0x8e, + 0x10, 0x01, + 0x47, 0x8b + }; + /* + * Array of byte pairs <address, value> + * to initialize QAM for lgdt3303 chip + */ + static const u8 lgdt3303_qam_data[] = { + 0x04, 0x00, + 0x0d, 0x00, + 0x0e, 0x00, + 0x0f, 0x00, + 0x10, 0x00, + 0x51, 0x63, + 0x47, 0x66, + 0x48, 0x66, + 0x4d, 0x1a, + 0x49, 0x08, + 0x4a, 0x9b + }; + u8 top_ctrl_cfg[] = { TOP_CONTROL, 0x03 }; + + int err = 0; + /* Change only if we are actually changing the modulation */ + if (state->current_modulation != p->modulation) { + switch (p->modulation) { + case VSB_8: + dprintk(state, "VSB_8 MODE\n"); + + /* Select VSB mode */ + top_ctrl_cfg[1] = 0x03; + + /* Select ANT connector if supported by card */ + if (state->config.pll_rf_set) + state->config.pll_rf_set(fe, 1); + + if (state->config.demod_chip == LGDT3303) { + err = i2c_write_demod_bytes(state, + lgdt3303_8vsb_44_data, + sizeof(lgdt3303_8vsb_44_data)); + } + break; + + case QAM_64: + dprintk(state, "QAM_64 MODE\n"); + + /* Select QAM_64 mode */ + top_ctrl_cfg[1] = 0x00; + + /* Select CABLE connector if supported by card */ + if (state->config.pll_rf_set) + state->config.pll_rf_set(fe, 0); + + if (state->config.demod_chip == LGDT3303) { + err = i2c_write_demod_bytes(state, + lgdt3303_qam_data, + sizeof(lgdt3303_qam_data)); + } + break; + + case QAM_256: + dprintk(state, "QAM_256 MODE\n"); + + /* Select QAM_256 mode */ + top_ctrl_cfg[1] = 0x01; + + /* Select CABLE connector if supported by card */ + if (state->config.pll_rf_set) + state->config.pll_rf_set(fe, 0); + + if (state->config.demod_chip == LGDT3303) { + err = i2c_write_demod_bytes(state, + lgdt3303_qam_data, + sizeof(lgdt3303_qam_data)); + } + break; + default: + dev_warn(&state->client->dev, + "%s: Modulation type(%d) UNSUPPORTED\n", + __func__, p->modulation); + return -1; + } + if (err < 0) + dev_warn(&state->client->dev, + "%s: error blasting bytes to lgdt3303 for modulation type(%d)\n", + __func__, p->modulation); + + /* + * select serial or parallel MPEG hardware interface + * Serial: 0x04 for LGDT3302 or 0x40 for LGDT3303 + * Parallel: 0x00 + */ + top_ctrl_cfg[1] |= state->config.serial_mpeg; + + /* Select the requested mode */ + i2c_write_demod_bytes(state, top_ctrl_cfg, + sizeof(top_ctrl_cfg)); + if (state->config.set_ts_params) + state->config.set_ts_params(fe, 0); + state->current_modulation = p->modulation; + } + + /* Tune to the specified frequency */ + 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); + } + + /* Keep track of the new frequency */ + /* + * FIXME this is the wrong way to do this... + * The tuner is shared with the video4linux analog API + */ + state->current_frequency = p->frequency; + + lgdt330x_sw_reset(state); + return 0; +} + +static int lgdt330x_get_frontend(struct dvb_frontend *fe, + struct dtv_frontend_properties *p) +{ + struct lgdt330x_state *state = fe->demodulator_priv; + + p->frequency = state->current_frequency; + return 0; +} + +/* + * Calculate SNR estimation (scaled by 2^24) + * + * 8-VSB SNR equations from LGDT3302 and LGDT3303 datasheets, QAM + * equations from LGDT3303 datasheet. VSB is the same between the '02 + * and '03, so maybe QAM is too? Perhaps someone with a newer datasheet + * that has QAM information could verify? + * + * For 8-VSB: (two ways, take your pick) + * LGDT3302: + * SNR_EQ = 10 * log10(25 * 24^2 / EQ_MSE) + * LGDT3303: + * SNR_EQ = 10 * log10(25 * 32^2 / EQ_MSE) + * LGDT3302 & LGDT3303: + * SNR_PT = 10 * log10(25 * 32^2 / PT_MSE) (we use this one) + * For 64-QAM: + * SNR = 10 * log10( 688128 / MSEQAM) + * For 256-QAM: + * SNR = 10 * log10( 696320 / MSEQAM) + * + * We re-write the snr equation as: + * SNR * 2^24 = 10*(c - intlog10(MSE)) + * Where for 256-QAM, c = log10(696320) * 2^24, and so on. + */ +static u32 calculate_snr(u32 mse, u32 c) +{ + if (mse == 0) /* No signal */ + return 0; + + mse = intlog10(mse); + if (mse > c) { + /* + * Negative SNR, which is possible, but realisticly the + * demod will lose lock before the signal gets this bad. + * The API only allows for unsigned values, so just return 0 + */ + return 0; + } + return 10 * (c - mse); +} + +static int lgdt3302_read_snr(struct dvb_frontend *fe) +{ + struct lgdt330x_state *state = fe->demodulator_priv; + u8 buf[5]; /* read data buffer */ + u32 noise; /* noise value */ + u32 c; /* per-modulation SNR calculation constant */ + + switch (state->current_modulation) { + case VSB_8: + i2c_read_demod_bytes(state, LGDT3302_EQPH_ERR0, buf, 5); +#ifdef USE_EQMSE + /* Use Equalizer Mean-Square Error Register */ + /* SNR for ranges from -15.61 to +41.58 */ + noise = ((buf[0] & 7) << 16) | (buf[1] << 8) | buf[2]; + c = 69765745; /* log10(25*24^2)*2^24 */ +#else + /* Use Phase Tracker Mean-Square Error Register */ + /* SNR for ranges from -13.11 to +44.08 */ + noise = ((buf[0] & 7 << 3) << 13) | (buf[3] << 8) | buf[4]; + c = 73957994; /* log10(25*32^2)*2^24 */ +#endif + break; + case QAM_64: + case QAM_256: + i2c_read_demod_bytes(state, CARRIER_MSEQAM1, buf, 2); + noise = ((buf[0] & 3) << 8) | buf[1]; + c = state->current_modulation == QAM_64 ? 97939837 : 98026066; + /* log10(688128)*2^24 and log10(696320)*2^24 */ + break; + default: + dev_err(&state->client->dev, + "%s: Modulation set to unsupported value\n", + __func__); + + state->snr = 0; + + return -EREMOTEIO; /* return -EDRIVER_IS_GIBBERED; */ + } + + state->snr = calculate_snr(noise, c); + + dprintk(state, "noise = 0x%08x, snr = %d.%02d dB\n", noise, + state->snr >> 24, (((state->snr >> 8) & 0xffff) * 100) >> 16); + + return 0; +} + +static int lgdt3303_read_snr(struct dvb_frontend *fe) +{ + struct lgdt330x_state *state = fe->demodulator_priv; + u8 buf[5]; /* read data buffer */ + u32 noise; /* noise value */ + u32 c; /* per-modulation SNR calculation constant */ + + switch (state->current_modulation) { + case VSB_8: + i2c_read_demod_bytes(state, LGDT3303_EQPH_ERR0, buf, 5); +#ifdef USE_EQMSE + /* Use Equalizer Mean-Square Error Register */ + /* SNR for ranges from -16.12 to +44.08 */ + noise = ((buf[0] & 0x78) << 13) | (buf[1] << 8) | buf[2]; + c = 73957994; /* log10(25*32^2)*2^24 */ +#else + /* Use Phase Tracker Mean-Square Error Register */ + /* SNR for ranges from -13.11 to +44.08 */ + noise = ((buf[0] & 7) << 16) | (buf[3] << 8) | buf[4]; + c = 73957994; /* log10(25*32^2)*2^24 */ +#endif + break; + case QAM_64: + case QAM_256: + i2c_read_demod_bytes(state, CARRIER_MSEQAM1, buf, 2); + noise = (buf[0] << 8) | buf[1]; + c = state->current_modulation == QAM_64 ? 97939837 : 98026066; + /* log10(688128)*2^24 and log10(696320)*2^24 */ + break; + default: + dev_err(&state->client->dev, + "%s: Modulation set to unsupported value\n", + __func__); + state->snr = 0; + return -EREMOTEIO; /* return -EDRIVER_IS_GIBBERED; */ + } + + state->snr = calculate_snr(noise, c); + + dprintk(state, "noise = 0x%08x, snr = %d.%02d dB\n", noise, + state->snr >> 24, (((state->snr >> 8) & 0xffff) * 100) >> 16); + + return 0; +} + +static int lgdt330x_read_snr(struct dvb_frontend *fe, u16 *snr) +{ + struct lgdt330x_state *state = fe->demodulator_priv; + + *snr = (state->snr) >> 16; /* Convert from 8.24 fixed-point to 8.8 */ + + return 0; +} + +static int lgdt330x_read_signal_strength(struct dvb_frontend *fe, u16 *strength) +{ + /* Calculate Strength from SNR up to 35dB */ + /* + * Even though the SNR can go higher than 35dB, there is some comfort + * factor in having a range of strong signals that can show at 100% + */ + struct lgdt330x_state *state = fe->demodulator_priv; + u16 snr; + int ret; + + ret = fe->ops.read_snr(fe, &snr); + if (ret != 0) + return ret; + /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */ + /* scale the range 0 - 35*2^24 into 0 - 65535 */ + if (state->snr >= 8960 * 0x10000) + *strength = 0xffff; + else + *strength = state->snr / 8960; + + return 0; +} + + +static int lgdt3302_read_status(struct dvb_frontend *fe, + enum fe_status *status) +{ + struct lgdt330x_state *state = fe->demodulator_priv; + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + u8 buf[3]; + int err; + + *status = 0; /* Reset status result */ + + /* AGC status register */ + i2c_read_demod_bytes(state, AGC_STATUS, buf, 1); + dprintk(state, "AGC_STATUS = 0x%02x\n", buf[0]); + if ((buf[0] & 0x0c) == 0x8) { + /* + * Test signal does not exist flag + * as well as the AGC lock flag. + */ + *status |= FE_HAS_SIGNAL; + } + + /* + * You must set the Mask bits to 1 in the IRQ_MASK in order + * to see that status bit in the IRQ_STATUS register. + * This is done in SwReset(); + */ + + /* signal status */ + i2c_read_demod_bytes(state, TOP_CONTROL, buf, sizeof(buf)); + dprintk(state, + "TOP_CONTROL = 0x%02x, IRO_MASK = 0x%02x, IRQ_STATUS = 0x%02x\n", + buf[0], buf[1], buf[2]); + + /* sync status */ + if ((buf[2] & 0x03) == 0x01) + *status |= FE_HAS_SYNC; + + /* FEC error status */ + if ((buf[2] & 0x0c) == 0x08) + *status |= FE_HAS_LOCK | FE_HAS_VITERBI; + + /* Carrier Recovery Lock Status Register */ + i2c_read_demod_bytes(state, CARRIER_LOCK, buf, 1); + dprintk(state, "CARRIER_LOCK = 0x%02x\n", buf[0]); + switch (state->current_modulation) { + case QAM_256: + case QAM_64: + /* Need to understand why there are 3 lock levels here */ + if ((buf[0] & 0x07) == 0x07) + *status |= FE_HAS_CARRIER; + break; + case VSB_8: + if ((buf[0] & 0x80) == 0x80) + *status |= FE_HAS_CARRIER; + break; + default: + dev_warn(&state->client->dev, + "%s: Modulation set to unsupported value\n", + __func__); + } + + if (!(*status & FE_HAS_LOCK)) { + p->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + p->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + p->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + return 0; + } + + if (state->last_stats_time && + time_is_after_jiffies(state->last_stats_time)) + return 0; + + state->last_stats_time = jiffies + msecs_to_jiffies(1000); + + err = lgdt3302_read_snr(fe); + if (!err) { + p->cnr.stat[0].scale = FE_SCALE_DECIBEL; + p->cnr.stat[0].svalue = (((u64)state->snr) * 1000) >> 24; + } else { + p->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + } + + err = i2c_read_demod_bytes(state, LGDT3302_PACKET_ERR_COUNTER1, + buf, sizeof(buf)); + if (!err) { + state->ucblocks = (buf[0] << 8) | buf[1]; + + dprintk(state, "UCB = 0x%02x\n", state->ucblocks); + + p->block_error.stat[0].uvalue += state->ucblocks; + /* FIXME: what's the basis for block count */ + p->block_count.stat[0].uvalue += 10000; + + p->block_error.stat[0].scale = FE_SCALE_COUNTER; + p->block_count.stat[0].scale = FE_SCALE_COUNTER; + } else { + p->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + p->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + } + + return 0; +} + +static int lgdt3303_read_status(struct dvb_frontend *fe, + enum fe_status *status) +{ + struct lgdt330x_state *state = fe->demodulator_priv; + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + u8 buf[3]; + int err; + + *status = 0; /* Reset status result */ + + /* lgdt3303 AGC status register */ + err = i2c_read_demod_bytes(state, 0x58, buf, 1); + if (err < 0) + return err; + + dprintk(state, "AGC_STATUS = 0x%02x\n", buf[0]); + if ((buf[0] & 0x21) == 0x01) { + /* + * Test input signal does not exist flag + * as well as the AGC lock flag. + */ + *status |= FE_HAS_SIGNAL; + } + + /* Carrier Recovery Lock Status Register */ + i2c_read_demod_bytes(state, CARRIER_LOCK, buf, 1); + dprintk(state, "CARRIER_LOCK = 0x%02x\n", buf[0]); + switch (state->current_modulation) { + case QAM_256: + case QAM_64: + /* Need to understand why there are 3 lock levels here */ + if ((buf[0] & 0x07) == 0x07) + *status |= FE_HAS_CARRIER; + else + break; + i2c_read_demod_bytes(state, 0x8a, buf, 1); + dprintk(state, "QAM LOCK = 0x%02x\n", buf[0]); + + if ((buf[0] & 0x04) == 0x04) + *status |= FE_HAS_SYNC; + if ((buf[0] & 0x01) == 0x01) + *status |= FE_HAS_LOCK; + if ((buf[0] & 0x08) == 0x08) + *status |= FE_HAS_VITERBI; + break; + case VSB_8: + if ((buf[0] & 0x80) == 0x80) + *status |= FE_HAS_CARRIER; + else + break; + i2c_read_demod_bytes(state, 0x38, buf, 1); + dprintk(state, "8-VSB LOCK = 0x%02x\n", buf[0]); + + if ((buf[0] & 0x02) == 0x00) + *status |= FE_HAS_SYNC; + if ((buf[0] & 0x01) == 0x01) + *status |= FE_HAS_VITERBI | FE_HAS_LOCK; + break; + default: + dev_warn(&state->client->dev, + "%s: Modulation set to unsupported value\n", + __func__); + } + + if (!(*status & FE_HAS_LOCK)) { + p->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + p->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + p->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + return 0; + } + + if (state->last_stats_time && + time_is_after_jiffies(state->last_stats_time)) + return 0; + + state->last_stats_time = jiffies + msecs_to_jiffies(1000); + + err = lgdt3303_read_snr(fe); + if (!err) { + p->cnr.stat[0].scale = FE_SCALE_DECIBEL; + p->cnr.stat[0].svalue = (((u64)state->snr) * 1000) >> 24; + } else { + p->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + } + + err = i2c_read_demod_bytes(state, LGDT3303_PACKET_ERR_COUNTER1, + buf, sizeof(buf)); + if (!err) { + state->ucblocks = (buf[0] << 8) | buf[1]; + + dprintk(state, "UCB = 0x%02x\n", state->ucblocks); + + p->block_error.stat[0].uvalue += state->ucblocks; + /* FIXME: what's the basis for block count */ + p->block_count.stat[0].uvalue += 10000; + + p->block_error.stat[0].scale = FE_SCALE_COUNTER; + p->block_count.stat[0].scale = FE_SCALE_COUNTER; + } else { + p->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + p->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + } + + return 0; +} + +static int +lgdt330x_get_tune_settings(struct dvb_frontend *fe, + struct dvb_frontend_tune_settings *fe_tune_settings) +{ + /* I have no idea about this - it may not be needed */ + fe_tune_settings->min_delay_ms = 500; + fe_tune_settings->step_size = 0; + fe_tune_settings->max_drift = 0; + return 0; +} + +static void lgdt330x_release(struct dvb_frontend *fe) +{ + struct lgdt330x_state *state = fe->demodulator_priv; + struct i2c_client *client = state->client; + + dev_dbg(&client->dev, "\n"); + + i2c_unregister_device(client); +} + +static struct dvb_frontend *lgdt330x_get_dvb_frontend(struct i2c_client *client) +{ + struct lgdt330x_state *state = i2c_get_clientdata(client); + + dev_dbg(&client->dev, "\n"); + + return &state->frontend; +} + +static const struct dvb_frontend_ops lgdt3302_ops; +static const struct dvb_frontend_ops lgdt3303_ops; + +static int lgdt330x_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct lgdt330x_state *state = NULL; + u8 buf[1]; + + /* Allocate memory for the internal state */ + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (!state) + goto error; + + /* Setup the state */ + memcpy(&state->config, client->dev.platform_data, + sizeof(state->config)); + i2c_set_clientdata(client, state); + state->client = client; + + /* Create dvb_frontend */ + switch (state->config.demod_chip) { + case LGDT3302: + memcpy(&state->frontend.ops, &lgdt3302_ops, + sizeof(struct dvb_frontend_ops)); + break; + case LGDT3303: + memcpy(&state->frontend.ops, &lgdt3303_ops, + sizeof(struct dvb_frontend_ops)); + break; + default: + goto error; + } + state->frontend.demodulator_priv = state; + + /* Setup get frontend callback */ + state->config.get_dvb_frontend = lgdt330x_get_dvb_frontend; + + /* Verify communication with demod chip */ + if (i2c_read_demod_bytes(state, 2, buf, 1)) + goto error; + + state->current_frequency = -1; + state->current_modulation = -1; + + dev_info(&state->client->dev, + "Demod loaded for LGDT330%s chip\n", + state->config.demod_chip == LGDT3302 ? "2" : "3"); + + return 0; + +error: + kfree(state); + if (debug) + dev_printk(KERN_DEBUG, &client->dev, "Error loading lgdt330x driver\n"); + return -ENODEV; +} +struct dvb_frontend *lgdt330x_attach(const struct lgdt330x_config *_config, + u8 demod_address, + struct i2c_adapter *i2c) +{ + struct i2c_client *client; + struct i2c_board_info board_info = {}; + struct lgdt330x_config config = *_config; + + strscpy(board_info.type, "lgdt330x", sizeof(board_info.type)); + board_info.addr = demod_address; + board_info.platform_data = &config; + client = i2c_new_client_device(i2c, &board_info); + if (!i2c_client_has_driver(client)) + return NULL; + + return lgdt330x_get_dvb_frontend(client); +} +EXPORT_SYMBOL_GPL(lgdt330x_attach); + +static const struct dvb_frontend_ops lgdt3302_ops = { + .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, + .info = { + .name = "LG Electronics LGDT3302 VSB/QAM Frontend", + .frequency_min_hz = 54 * MHz, + .frequency_max_hz = 858 * MHz, + .frequency_stepsize_hz = 62500, + .symbol_rate_min = 5056941, /* QAM 64 */ + .symbol_rate_max = 10762000, /* VSB 8 */ + .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB + }, + .init = lgdt330x_init, + .set_frontend = lgdt330x_set_parameters, + .get_frontend = lgdt330x_get_frontend, + .get_tune_settings = lgdt330x_get_tune_settings, + .read_status = lgdt3302_read_status, + .read_signal_strength = lgdt330x_read_signal_strength, + .read_snr = lgdt330x_read_snr, + .read_ucblocks = lgdt330x_read_ucblocks, + .release = lgdt330x_release, +}; + +static const struct dvb_frontend_ops lgdt3303_ops = { + .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, + .info = { + .name = "LG Electronics LGDT3303 VSB/QAM Frontend", + .frequency_min_hz = 54 * MHz, + .frequency_max_hz = 858 * MHz, + .frequency_stepsize_hz = 62500, + .symbol_rate_min = 5056941, /* QAM 64 */ + .symbol_rate_max = 10762000, /* VSB 8 */ + .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB + }, + .init = lgdt330x_init, + .set_frontend = lgdt330x_set_parameters, + .get_frontend = lgdt330x_get_frontend, + .get_tune_settings = lgdt330x_get_tune_settings, + .read_status = lgdt3303_read_status, + .read_signal_strength = lgdt330x_read_signal_strength, + .read_snr = lgdt330x_read_snr, + .read_ucblocks = lgdt330x_read_ucblocks, + .release = lgdt330x_release, +}; + +static void lgdt330x_remove(struct i2c_client *client) +{ + struct lgdt330x_state *state = i2c_get_clientdata(client); + + dev_dbg(&client->dev, "\n"); + + kfree(state); +} + +static const struct i2c_device_id lgdt330x_id_table[] = { + {"lgdt330x", 0}, + {} +}; +MODULE_DEVICE_TABLE(i2c, lgdt330x_id_table); + +static struct i2c_driver lgdt330x_driver = { + .driver = { + .name = "lgdt330x", + .suppress_bind_attrs = true, + }, + .probe = lgdt330x_probe, + .remove = lgdt330x_remove, + .id_table = lgdt330x_id_table, +}; + +module_i2c_driver(lgdt330x_driver); + + +MODULE_DESCRIPTION("LGDT330X (ATSC 8VSB & ITU-T J.83 AnnexB 64/256 QAM) Demodulator Driver"); +MODULE_AUTHOR("Wilson Michaels"); +MODULE_LICENSE("GPL"); |