1 files changed, 684 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/zl10353.c b/drivers/media/dvb-frontends/zl10353.c
new file mode 100644
index 0000000..82946cd
--- /dev/null
+++ b/drivers/media/dvb-frontends/zl10353.c
@@ -0,0 +1,684 @@
+/*
+ * Driver for Zarlink DVB-T ZL10353 demodulator
+ *
+ * Copyright (C) 2006, 2007 Christopher Pascoe <c.pascoe@itee.uq.edu.au>
+ *
+ * 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.
+ */
+
+#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/div64.h>
+
+#include "dvb_frontend.h"
+#include "zl10353_priv.h"
+#include "zl10353.h"
+
+struct zl10353_state {
+	struct i2c_adapter *i2c;
+	struct dvb_frontend frontend;
+
+	struct zl10353_config config;
+
+	u32 bandwidth;
+	u32 ucblocks;
+	u32 frequency;
+};
+
+static int debug;
+#define dprintk(args...) \
+	do { \
+		if (debug) printk(KERN_DEBUG "zl10353: " args); \
+	} while (0)
+
+static int debug_regs;
+
+static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	u8 buf[2] = { reg, val };
+	struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0,
+			       .buf = buf, .len = 2 };
+	int err = i2c_transfer(state->i2c, &msg, 1);
+	if (err != 1) {
+		printk("zl10353: write to reg %x failed (err = %d)!\n", reg, err);
+		return err;
+	}
+	return 0;
+}
+
+static int zl10353_write(struct dvb_frontend *fe, const u8 ibuf[], int ilen)
+{
+	int err, i;
+	for (i = 0; i < ilen - 1; i++)
+		if ((err = zl10353_single_write(fe, ibuf[0] + i, ibuf[i + 1])))
+			return err;
+
+	return 0;
+}
+
+static int zl10353_read_register(struct zl10353_state *state, u8 reg)
+{
+	int ret;
+	u8 b0[1] = { reg };
+	u8 b1[1] = { 0 };
+	struct i2c_msg msg[2] = { { .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, msg, 2);
+
+	if (ret != 2) {
+		printk("%s: readreg error (reg=%d, ret==%i)\n",
+		       __func__, reg, ret);
+		return ret;
+	}
+
+	return b1[0];
+}
+
+static void zl10353_dump_regs(struct dvb_frontend *fe)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	int ret;
+	u8 reg;
+
+	/* Dump all registers. */
+	for (reg = 0; ; reg++) {
+		if (reg % 16 == 0) {
+			if (reg)
+				printk(KERN_CONT "\n");
+			printk(KERN_DEBUG "%02x:", reg);
+		}
+		ret = zl10353_read_register(state, reg);
+		if (ret >= 0)
+			printk(KERN_CONT " %02x", (u8)ret);
+		else
+			printk(KERN_CONT " --");
+		if (reg == 0xff)
+			break;
+	}
+	printk(KERN_CONT "\n");
+}
+
+static void zl10353_calc_nominal_rate(struct dvb_frontend *fe,
+				      u32 bandwidth,
+				      u16 *nominal_rate)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	u32 adc_clock = 450560; /* 45.056 MHz */
+	u64 value;
+	u8 bw = bandwidth / 1000000;
+
+	if (state->config.adc_clock)
+		adc_clock = state->config.adc_clock;
+
+	value = (u64)10 * (1 << 23) / 7 * 125;
+	value = (bw * value) + adc_clock / 2;
+	do_div(value, adc_clock);
+	*nominal_rate = value;
+
+	dprintk("%s: bw %d, adc_clock %d => 0x%x\n",
+		__func__, bw, adc_clock, *nominal_rate);
+}
+
+static void zl10353_calc_input_freq(struct dvb_frontend *fe,
+				    u16 *input_freq)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	u32 adc_clock = 450560;	/* 45.056  MHz */
+	int if2 = 361667;	/* 36.1667 MHz */
+	int ife;
+	u64 value;
+
+	if (state->config.adc_clock)
+		adc_clock = state->config.adc_clock;
+	if (state->config.if2)
+		if2 = state->config.if2;
+
+	if (adc_clock >= if2 * 2)
+		ife = if2;
+	else {
+		ife = adc_clock - (if2 % adc_clock);
+		if (ife > adc_clock / 2)
+			ife = adc_clock - ife;
+	}
+	value = (u64)65536 * ife + adc_clock / 2;
+	do_div(value, adc_clock);
+	*input_freq = -value;
+
+	dprintk("%s: if2 %d, ife %d, adc_clock %d => %d / 0x%x\n",
+		__func__, if2, ife, adc_clock, -(int)value, *input_freq);
+}
+
+static int zl10353_sleep(struct dvb_frontend *fe)
+{
+	static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 };
+
+	zl10353_write(fe, zl10353_softdown, sizeof(zl10353_softdown));
+	return 0;
+}
+
+static int zl10353_set_parameters(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	struct zl10353_state *state = fe->demodulator_priv;
+	u16 nominal_rate, input_freq;
+	u8 pllbuf[6] = { 0x67 }, acq_ctl = 0;
+	u16 tps = 0;
+
+	state->frequency = c->frequency;
+
+	zl10353_single_write(fe, RESET, 0x80);
+	udelay(200);
+	zl10353_single_write(fe, 0xEA, 0x01);
+	udelay(200);
+	zl10353_single_write(fe, 0xEA, 0x00);
+
+	zl10353_single_write(fe, AGC_TARGET, 0x28);
+
+	if (c->transmission_mode != TRANSMISSION_MODE_AUTO)
+		acq_ctl |= (1 << 0);
+	if (c->guard_interval != GUARD_INTERVAL_AUTO)
+		acq_ctl |= (1 << 1);
+	zl10353_single_write(fe, ACQ_CTL, acq_ctl);
+
+	switch (c->bandwidth_hz) {
+	case 6000000:
+		/* These are extrapolated from the 7 and 8MHz values */
+		zl10353_single_write(fe, MCLK_RATIO, 0x97);
+		zl10353_single_write(fe, 0x64, 0x34);
+		zl10353_single_write(fe, 0xcc, 0xdd);
+		break;
+	case 7000000:
+		zl10353_single_write(fe, MCLK_RATIO, 0x86);
+		zl10353_single_write(fe, 0x64, 0x35);
+		zl10353_single_write(fe, 0xcc, 0x73);
+		break;
+	default:
+		c->bandwidth_hz = 8000000;
+		/* fall though */
+	case 8000000:
+		zl10353_single_write(fe, MCLK_RATIO, 0x75);
+		zl10353_single_write(fe, 0x64, 0x36);
+		zl10353_single_write(fe, 0xcc, 0x73);
+	}
+
+	zl10353_calc_nominal_rate(fe, c->bandwidth_hz, &nominal_rate);
+	zl10353_single_write(fe, TRL_NOMINAL_RATE_1, msb(nominal_rate));
+	zl10353_single_write(fe, TRL_NOMINAL_RATE_0, lsb(nominal_rate));
+	state->bandwidth = c->bandwidth_hz;
+
+	zl10353_calc_input_freq(fe, &input_freq);
+	zl10353_single_write(fe, INPUT_FREQ_1, msb(input_freq));
+	zl10353_single_write(fe, INPUT_FREQ_0, lsb(input_freq));
+
+	/* Hint at TPS settings */
+	switch (c->code_rate_HP) {
+	case FEC_2_3:
+		tps |= (1 << 7);
+		break;
+	case FEC_3_4:
+		tps |= (2 << 7);
+		break;
+	case FEC_5_6:
+		tps |= (3 << 7);
+		break;
+	case FEC_7_8:
+		tps |= (4 << 7);
+		break;
+	case FEC_1_2:
+	case FEC_AUTO:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (c->code_rate_LP) {
+	case FEC_2_3:
+		tps |= (1 << 4);
+		break;
+	case FEC_3_4:
+		tps |= (2 << 4);
+		break;
+	case FEC_5_6:
+		tps |= (3 << 4);
+		break;
+	case FEC_7_8:
+		tps |= (4 << 4);
+		break;
+	case FEC_1_2:
+	case FEC_AUTO:
+		break;
+	case FEC_NONE:
+		if (c->hierarchy == HIERARCHY_AUTO ||
+		    c->hierarchy == HIERARCHY_NONE)
+			break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (c->modulation) {
+	case QPSK:
+		break;
+	case QAM_AUTO:
+	case QAM_16:
+		tps |= (1 << 13);
+		break;
+	case QAM_64:
+		tps |= (2 << 13);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (c->transmission_mode) {
+	case TRANSMISSION_MODE_2K:
+	case TRANSMISSION_MODE_AUTO:
+		break;
+	case TRANSMISSION_MODE_8K:
+		tps |= (1 << 0);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (c->guard_interval) {
+	case GUARD_INTERVAL_1_32:
+	case GUARD_INTERVAL_AUTO:
+		break;
+	case GUARD_INTERVAL_1_16:
+		tps |= (1 << 2);
+		break;
+	case GUARD_INTERVAL_1_8:
+		tps |= (2 << 2);
+		break;
+	case GUARD_INTERVAL_1_4:
+		tps |= (3 << 2);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (c->hierarchy) {
+	case HIERARCHY_AUTO:
+	case HIERARCHY_NONE:
+		break;
+	case HIERARCHY_1:
+		tps |= (1 << 10);
+		break;
+	case HIERARCHY_2:
+		tps |= (2 << 10);
+		break;
+	case HIERARCHY_4:
+		tps |= (3 << 10);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	zl10353_single_write(fe, TPS_GIVEN_1, msb(tps));
+	zl10353_single_write(fe, TPS_GIVEN_0, lsb(tps));
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	/*
+	 * If there is no tuner attached to the secondary I2C bus, we call
+	 * set_params to program a potential tuner attached somewhere else.
+	 * Otherwise, we update the PLL registers via calc_regs.
+	 */
+	if (state->config.no_tuner) {
+		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);
+		}
+	} else if (fe->ops.tuner_ops.calc_regs) {
+		fe->ops.tuner_ops.calc_regs(fe, pllbuf + 1, 5);
+		pllbuf[1] <<= 1;
+		zl10353_write(fe, pllbuf, sizeof(pllbuf));
+	}
+
+	zl10353_single_write(fe, 0x5F, 0x13);
+
+	/* If no attached tuner or invalid PLL registers, just start the FSM. */
+	if (state->config.no_tuner || fe->ops.tuner_ops.calc_regs == NULL)
+		zl10353_single_write(fe, FSM_GO, 0x01);
+	else
+		zl10353_single_write(fe, TUNER_GO, 0x01);
+
+	return 0;
+}
+
+static int zl10353_get_parameters(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	struct zl10353_state *state = fe->demodulator_priv;
+	int s6, s9;
+	u16 tps;
+	static const u8 tps_fec_to_api[8] = {
+		FEC_1_2,
+		FEC_2_3,
+		FEC_3_4,
+		FEC_5_6,
+		FEC_7_8,
+		FEC_AUTO,
+		FEC_AUTO,
+		FEC_AUTO
+	};
+
+	s6 = zl10353_read_register(state, STATUS_6);
+	s9 = zl10353_read_register(state, STATUS_9);
+	if (s6 < 0 || s9 < 0)
+		return -EREMOTEIO;
+	if ((s6 & (1 << 5)) == 0 || (s9 & (1 << 4)) == 0)
+		return -EINVAL;	/* no FE or TPS lock */
+
+	tps = zl10353_read_register(state, TPS_RECEIVED_1) << 8 |
+	      zl10353_read_register(state, TPS_RECEIVED_0);
+
+	c->code_rate_HP = tps_fec_to_api[(tps >> 7) & 7];
+	c->code_rate_LP = tps_fec_to_api[(tps >> 4) & 7];
+
+	switch ((tps >> 13) & 3) {
+	case 0:
+		c->modulation = QPSK;
+		break;
+	case 1:
+		c->modulation = QAM_16;
+		break;
+	case 2:
+		c->modulation = QAM_64;
+		break;
+	default:
+		c->modulation = QAM_AUTO;
+		break;
+	}
+
+	c->transmission_mode = (tps & 0x01) ? TRANSMISSION_MODE_8K :
+					       TRANSMISSION_MODE_2K;
+
+	switch ((tps >> 2) & 3) {
+	case 0:
+		c->guard_interval = GUARD_INTERVAL_1_32;
+		break;
+	case 1:
+		c->guard_interval = GUARD_INTERVAL_1_16;
+		break;
+	case 2:
+		c->guard_interval = GUARD_INTERVAL_1_8;
+		break;
+	case 3:
+		c->guard_interval = GUARD_INTERVAL_1_4;
+		break;
+	default:
+		c->guard_interval = GUARD_INTERVAL_AUTO;
+		break;
+	}
+
+	switch ((tps >> 10) & 7) {
+	case 0:
+		c->hierarchy = HIERARCHY_NONE;
+		break;
+	case 1:
+		c->hierarchy = HIERARCHY_1;
+		break;
+	case 2:
+		c->hierarchy = HIERARCHY_2;
+		break;
+	case 3:
+		c->hierarchy = HIERARCHY_4;
+		break;
+	default:
+		c->hierarchy = HIERARCHY_AUTO;
+		break;
+	}
+
+	c->frequency = state->frequency;
+	c->bandwidth_hz = state->bandwidth;
+	c->inversion = INVERSION_AUTO;
+
+	return 0;
+}
+
+static int zl10353_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	int s6, s7, s8;
+
+	if ((s6 = zl10353_read_register(state, STATUS_6)) < 0)
+		return -EREMOTEIO;
+	if ((s7 = zl10353_read_register(state, STATUS_7)) < 0)
+		return -EREMOTEIO;
+	if ((s8 = zl10353_read_register(state, STATUS_8)) < 0)
+		return -EREMOTEIO;
+
+	*status = 0;
+	if (s6 & (1 << 2))
+		*status |= FE_HAS_CARRIER;
+	if (s6 & (1 << 1))
+		*status |= FE_HAS_VITERBI;
+	if (s6 & (1 << 5))
+		*status |= FE_HAS_LOCK;
+	if (s7 & (1 << 4))
+		*status |= FE_HAS_SYNC;
+	if (s8 & (1 << 6))
+		*status |= FE_HAS_SIGNAL;
+
+	if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
+	    (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
+		*status &= ~FE_HAS_LOCK;
+
+	return 0;
+}
+
+static int zl10353_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+
+	*ber = zl10353_read_register(state, RS_ERR_CNT_2) << 16 |
+	       zl10353_read_register(state, RS_ERR_CNT_1) << 8 |
+	       zl10353_read_register(state, RS_ERR_CNT_0);
+
+	return 0;
+}
+
+static int zl10353_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+
+	u16 signal = zl10353_read_register(state, AGC_GAIN_1) << 10 |
+		     zl10353_read_register(state, AGC_GAIN_0) << 2 | 3;
+
+	*strength = ~signal;
+
+	return 0;
+}
+
+static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	u8 _snr;
+
+	if (debug_regs)
+		zl10353_dump_regs(fe);
+
+	_snr = zl10353_read_register(state, SNR);
+	*snr = 10 * _snr / 8;
+
+	return 0;
+}
+
+static int zl10353_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+       u32 ubl = 0;
+
+       ubl = zl10353_read_register(state, RS_UBC_1) << 8 |
+	     zl10353_read_register(state, RS_UBC_0);
+
+       state->ucblocks += ubl;
+       *ucblocks = state->ucblocks;
+
+	return 0;
+}
+
+static int zl10353_get_tune_settings(struct dvb_frontend *fe,
+				     struct dvb_frontend_tune_settings
+					 *fe_tune_settings)
+{
+	fe_tune_settings->min_delay_ms = 1000;
+	fe_tune_settings->step_size = 0;
+	fe_tune_settings->max_drift = 0;
+
+	return 0;
+}
+
+static int zl10353_init(struct dvb_frontend *fe)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	u8 zl10353_reset_attach[6] = { 0x50, 0x03, 0x64, 0x46, 0x15, 0x0F };
+
+	if (debug_regs)
+		zl10353_dump_regs(fe);
+	if (state->config.parallel_ts)
+		zl10353_reset_attach[2] &= ~0x20;
+	if (state->config.clock_ctl_1)
+		zl10353_reset_attach[3] = state->config.clock_ctl_1;
+	if (state->config.pll_0)
+		zl10353_reset_attach[4] = state->config.pll_0;
+
+	/* Do a "hard" reset if not already done */
+	if (zl10353_read_register(state, 0x50) != zl10353_reset_attach[1] ||
+	    zl10353_read_register(state, 0x51) != zl10353_reset_attach[2]) {
+		zl10353_write(fe, zl10353_reset_attach,
+				   sizeof(zl10353_reset_attach));
+		if (debug_regs)
+			zl10353_dump_regs(fe);
+	}
+
+	return 0;
+}
+
+static int zl10353_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	u8 val = 0x0a;
+
+	if (state->config.disable_i2c_gate_ctrl) {
+		/* No tuner attached to the internal I2C bus */
+		/* If set enable I2C bridge, the main I2C bus stopped hardly */
+		return 0;
+	}
+
+	if (enable)
+		val |= 0x10;
+
+	return zl10353_single_write(fe, 0x62, val);
+}
+
+static void zl10353_release(struct dvb_frontend *fe)
+{
+	struct zl10353_state *state = fe->demodulator_priv;
+	kfree(state);
+}
+
+static struct dvb_frontend_ops zl10353_ops;
+
+struct dvb_frontend *zl10353_attach(const struct zl10353_config *config,
+				    struct i2c_adapter *i2c)
+{
+	struct zl10353_state *state = NULL;
+	int id;
+
+	/* allocate memory for the internal state */
+	state = kzalloc(sizeof(struct zl10353_state), GFP_KERNEL);
+	if (state == NULL)
+		goto error;
+
+	/* setup the state */
+	state->i2c = i2c;
+	memcpy(&state->config, config, sizeof(struct zl10353_config));
+
+	/* check if the demod is there */
+	id = zl10353_read_register(state, CHIP_ID);
+	if ((id != ID_ZL10353) && (id != ID_CE6230) && (id != ID_CE6231))
+		goto error;
+
+	/* create dvb_frontend */
+	memcpy(&state->frontend.ops, &zl10353_ops, sizeof(struct dvb_frontend_ops));
+	state->frontend.demodulator_priv = state;
+
+	return &state->frontend;
+error:
+	kfree(state);
+	return NULL;
+}
+
+static struct dvb_frontend_ops zl10353_ops = {
+	.delsys = { SYS_DVBT },
+	.info = {
+		.name			= "Zarlink ZL10353 DVB-T",
+		.frequency_min		= 174000000,
+		.frequency_max		= 862000000,
+		.frequency_stepsize	= 166667,
+		.frequency_tolerance	= 0,
+		.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 |
+			FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
+			FE_CAN_FEC_AUTO |
+			FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
+			FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
+			FE_CAN_HIERARCHY_AUTO | FE_CAN_RECOVER |
+			FE_CAN_MUTE_TS
+	},
+
+	.release = zl10353_release,
+
+	.init = zl10353_init,
+	.sleep = zl10353_sleep,
+	.i2c_gate_ctrl = zl10353_i2c_gate_ctrl,
+	.write = zl10353_write,
+
+	.set_frontend = zl10353_set_parameters,
+	.get_frontend = zl10353_get_parameters,
+	.get_tune_settings = zl10353_get_tune_settings,
+
+	.read_status = zl10353_read_status,
+	.read_ber = zl10353_read_ber,
+	.read_signal_strength = zl10353_read_signal_strength,
+	.read_snr = zl10353_read_snr,
+	.read_ucblocks = zl10353_read_ucblocks,
+};
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+module_param(debug_regs, int, 0644);
+MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off).");
+
+MODULE_DESCRIPTION("Zarlink ZL10353 DVB-T demodulator driver");
+MODULE_AUTHOR("Chris Pascoe");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(zl10353_attach);