summaryrefslogtreecommitdiffstats
path: root/drivers/media/dvb-frontends/lgdt330x.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/media/dvb-frontends/lgdt330x.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/media/dvb-frontends/lgdt330x.c')
-rw-r--r--drivers/media/dvb-frontends/lgdt330x.c1007
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");