[linux-2.6-block.git] / drivers / media / dvb-frontends / nxt6000.c

/*
	NxtWave Communications - NXT6000 demodulator driver

    Copyright (C) 2002-2003 Florian Schirmer <jolt@tuxbox.org>
    Copyright (C) 2003 Paul Andreassen <paul@andreassen.com.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/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>

#include "dvb_frontend.h"
#include "nxt6000_priv.h"
#include "nxt6000.h"


struct nxt6000_state {
	struct i2c_adapter* i2c;
	/* configuration settings */
	const struct nxt6000_config* config;
	struct dvb_frontend frontend;
};

static int debug;
#define dprintk if (debug) printk

static int nxt6000_writereg(struct nxt6000_state* state, u8 reg, u8 data)
{
	u8 buf[] = { reg, data };
	struct i2c_msg msg = {.addr = state->config->demod_address,.flags = 0,.buf = buf,.len = 2 };
	int ret;

	if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1)
		dprintk("nxt6000: nxt6000_write error (reg: 0x%02X, data: 0x%02X, ret: %d)\n", reg, data, ret);

	return (ret != 1) ? -EIO : 0;
}

static u8 nxt6000_readreg(struct nxt6000_state* state, u8 reg)
{
	int ret;
	u8 b0[] = { reg };
	u8 b1[] = { 0 };
	struct i2c_msg msgs[] = {
		{.addr = state->config->demod_address,.flags = 0,.buf = b0,.len = 1},
		{.addr = state->config->demod_address,.flags = I2C_M_RD,.buf = b1,.len = 1}
	};

	ret = i2c_transfer(state->i2c, msgs, 2);

	if (ret != 2)
		dprintk("nxt6000: nxt6000_read error (reg: 0x%02X, ret: %d)\n", reg, ret);

	return b1[0];
}

static void nxt6000_reset(struct nxt6000_state* state)
{
	u8 val;

	val = nxt6000_readreg(state, OFDM_COR_CTL);

	nxt6000_writereg(state, OFDM_COR_CTL, val & ~COREACT);
	nxt6000_writereg(state, OFDM_COR_CTL, val | COREACT);
}

static int nxt6000_set_bandwidth(struct nxt6000_state *state, u32 bandwidth)
{
	u16 nominal_rate;
	int result;

	switch (bandwidth) {
	case 6000000:
		nominal_rate = 0x55B7;
		break;

	case 7000000:
		nominal_rate = 0x6400;
		break;

	case 8000000:
		nominal_rate = 0x7249;
		break;

	default:
		return -EINVAL;
	}

	if ((result = nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, nominal_rate & 0xFF)) < 0)
		return result;

	return nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, (nominal_rate >> 8) & 0xFF);
}

static int nxt6000_set_guard_interval(struct nxt6000_state *state,
				      enum fe_guard_interval guard_interval)
{
	switch (guard_interval) {

	case GUARD_INTERVAL_1_32:
		return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x00 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));

	case GUARD_INTERVAL_1_16:
		return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x01 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));

	case GUARD_INTERVAL_AUTO:
	case GUARD_INTERVAL_1_8:
		return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x02 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));

	case GUARD_INTERVAL_1_4:
		return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x03 | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));

	default:
		return -EINVAL;
	}
}

static int nxt6000_set_inversion(struct nxt6000_state *state,
				 enum fe_spectral_inversion inversion)
{
	switch (inversion) {

	case INVERSION_OFF:
		return nxt6000_writereg(state, OFDM_ITB_CTL, 0x00);

	case INVERSION_ON:
		return nxt6000_writereg(state, OFDM_ITB_CTL, ITBINV);

	default:
		return -EINVAL;

	}
}

static int
nxt6000_set_transmission_mode(struct nxt6000_state *state,
			      enum fe_transmit_mode transmission_mode)
{
	int result;

	switch (transmission_mode) {

	case TRANSMISSION_MODE_2K:
		if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x00 | (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
			return result;

		return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x00 << 2) | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));

	case TRANSMISSION_MODE_8K:
	case TRANSMISSION_MODE_AUTO:
		if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x02 | (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
			return result;

		return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x01 << 2) | (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));

	default:
		return -EINVAL;

	}
}

static void nxt6000_setup(struct dvb_frontend* fe)
{
	struct nxt6000_state* state = fe->demodulator_priv;

	nxt6000_writereg(state, RS_COR_SYNC_PARAM, SYNC_PARAM);
	nxt6000_writereg(state, BER_CTRL, /*(1 << 2) | */ (0x01 << 1) | 0x01);
	nxt6000_writereg(state, VIT_BERTIME_2, 0x00);  // BER Timer = 0x000200 * 256 = 131072 bits
	nxt6000_writereg(state, VIT_BERTIME_1, 0x02);  //
	nxt6000_writereg(state, VIT_BERTIME_0, 0x00);  //
	nxt6000_writereg(state, VIT_COR_INTEN, 0x98); // Enable BER interrupts
	nxt6000_writereg(state, VIT_COR_CTL, 0x82);   // Enable BER measurement
	nxt6000_writereg(state, VIT_COR_CTL, VIT_COR_RESYNC | 0x02 );
	nxt6000_writereg(state, OFDM_COR_CTL, (0x01 << 5) | (nxt6000_readreg(state, OFDM_COR_CTL) & 0x0F));
	nxt6000_writereg(state, OFDM_COR_MODEGUARD, FORCEMODE8K | 0x02);
	nxt6000_writereg(state, OFDM_AGC_CTL, AGCLAST | INITIAL_AGC_BW);
	nxt6000_writereg(state, OFDM_ITB_FREQ_1, 0x06);
	nxt6000_writereg(state, OFDM_ITB_FREQ_2, 0x31);
	nxt6000_writereg(state, OFDM_CAS_CTL, (0x01 << 7) | (0x02 << 3) | 0x04);
	nxt6000_writereg(state, CAS_FREQ, 0xBB);	/* CHECKME */
	nxt6000_writereg(state, OFDM_SYR_CTL, 1 << 2);
	nxt6000_writereg(state, OFDM_PPM_CTL_1, PPM256);
	nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, 0x49);
	nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, 0x72);
	nxt6000_writereg(state, ANALOG_CONTROL_0, 1 << 5);
	nxt6000_writereg(state, EN_DMD_RACQ, (1 << 7) | (3 << 4) | 2);
	nxt6000_writereg(state, DIAG_CONFIG, TB_SET);

	if (state->config->clock_inversion)
		nxt6000_writereg(state, SUB_DIAG_MODE_SEL, CLKINVERSION);
	else
		nxt6000_writereg(state, SUB_DIAG_MODE_SEL, 0);

	nxt6000_writereg(state, TS_FORMAT, 0);
}

static void nxt6000_dump_status(struct nxt6000_state *state)
{
	u8 val;

/*
	printk("RS_COR_STAT: 0x%02X\n", nxt6000_readreg(fe, RS_COR_STAT));
	printk("VIT_SYNC_STATUS: 0x%02X\n", nxt6000_readreg(fe, VIT_SYNC_STATUS));
	printk("OFDM_COR_STAT: 0x%02X\n", nxt6000_readreg(fe, OFDM_COR_STAT));
	printk("OFDM_SYR_STAT: 0x%02X\n", nxt6000_readreg(fe, OFDM_SYR_STAT));
	printk("OFDM_TPS_RCVD_1: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_1));
	printk("OFDM_TPS_RCVD_2: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_2));
	printk("OFDM_TPS_RCVD_3: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_3));
	printk("OFDM_TPS_RCVD_4: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_4));
	printk("OFDM_TPS_RESERVED_1: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RESERVED_1));
	printk("OFDM_TPS_RESERVED_2: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RESERVED_2));
*/
	printk("NXT6000 status:");

	val = nxt6000_readreg(state, RS_COR_STAT);

	printk(" DATA DESCR LOCK: %d,", val & 0x01);
	printk(" DATA SYNC LOCK: %d,", (val >> 1) & 0x01);

	val = nxt6000_readreg(state, VIT_SYNC_STATUS);

	printk(" VITERBI LOCK: %d,", (val >> 7) & 0x01);

	switch ((val >> 4) & 0x07) {

	case 0x00:
		printk(" VITERBI CODERATE: 1/2,");
		break;

	case 0x01:
		printk(" VITERBI CODERATE: 2/3,");
		break;

	case 0x02:
		printk(" VITERBI CODERATE: 3/4,");
		break;

	case 0x03:
		printk(" VITERBI CODERATE: 5/6,");
		break;

	case 0x04:
		printk(" VITERBI CODERATE: 7/8,");
		break;

	default:
		printk(" VITERBI CODERATE: Reserved,");

	}

	val = nxt6000_readreg(state, OFDM_COR_STAT);

	printk(" CHCTrack: %d,", (val >> 7) & 0x01);
	printk(" TPSLock: %d,", (val >> 6) & 0x01);
	printk(" SYRLock: %d,", (val >> 5) & 0x01);
	printk(" AGCLock: %d,", (val >> 4) & 0x01);

	switch (val & 0x0F) {

	case 0x00:
		printk(" CoreState: IDLE,");
		break;

	case 0x02:
		printk(" CoreState: WAIT_AGC,");
		break;

	case 0x03:
		printk(" CoreState: WAIT_SYR,");
		break;

	case 0x04:
		printk(" CoreState: WAIT_PPM,");
		break;

	case 0x01:
		printk(" CoreState: WAIT_TRL,");
		break;

	case 0x05:
		printk(" CoreState: WAIT_TPS,");
		break;

	case 0x06:
		printk(" CoreState: MONITOR_TPS,");
		break;

	default:
		printk(" CoreState: Reserved,");

	}

	val = nxt6000_readreg(state, OFDM_SYR_STAT);

	printk(" SYRLock: %d,", (val >> 4) & 0x01);
	printk(" SYRMode: %s,", (val >> 2) & 0x01 ? "8K" : "2K");

	switch ((val >> 4) & 0x03) {

	case 0x00:
		printk(" SYRGuard: 1/32,");
		break;

	case 0x01:
		printk(" SYRGuard: 1/16,");
		break;

	case 0x02:
		printk(" SYRGuard: 1/8,");
		break;

	case 0x03:
		printk(" SYRGuard: 1/4,");
		break;
	}

	val = nxt6000_readreg(state, OFDM_TPS_RCVD_3);

	switch ((val >> 4) & 0x07) {

	case 0x00:
		printk(" TPSLP: 1/2,");
		break;

	case 0x01:
		printk(" TPSLP: 2/3,");
		break;

	case 0x02:
		printk(" TPSLP: 3/4,");
		break;

	case 0x03:
		printk(" TPSLP: 5/6,");
		break;

	case 0x04:
		printk(" TPSLP: 7/8,");
		break;

	default:
		printk(" TPSLP: Reserved,");

	}

	switch (val & 0x07) {

	case 0x00:
		printk(" TPSHP: 1/2,");
		break;

	case 0x01:
		printk(" TPSHP: 2/3,");
		break;

	case 0x02:
		printk(" TPSHP: 3/4,");
		break;

	case 0x03:
		printk(" TPSHP: 5/6,");
		break;

	case 0x04:
		printk(" TPSHP: 7/8,");
		break;

	default:
		printk(" TPSHP: Reserved,");

	}

	val = nxt6000_readreg(state, OFDM_TPS_RCVD_4);

	printk(" TPSMode: %s,", val & 0x01 ? "8K" : "2K");

	switch ((val >> 4) & 0x03) {

	case 0x00:
		printk(" TPSGuard: 1/32,");
		break;

	case 0x01:
		printk(" TPSGuard: 1/16,");
		break;

	case 0x02:
		printk(" TPSGuard: 1/8,");
		break;

	case 0x03:
		printk(" TPSGuard: 1/4,");
		break;

	}

	/* Strange magic required to gain access to RF_AGC_STATUS */
	nxt6000_readreg(state, RF_AGC_VAL_1);
	val = nxt6000_readreg(state, RF_AGC_STATUS);
	val = nxt6000_readreg(state, RF_AGC_STATUS);

	printk(" RF AGC LOCK: %d,", (val >> 4) & 0x01);
	printk("\n");
}

static int nxt6000_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
	u8 core_status;
	struct nxt6000_state* state = fe->demodulator_priv;

	*status = 0;

	core_status = nxt6000_readreg(state, OFDM_COR_STAT);

	if (core_status & AGCLOCKED)
		*status |= FE_HAS_SIGNAL;

	if (nxt6000_readreg(state, OFDM_SYR_STAT) & GI14_SYR_LOCK)
		*status |= FE_HAS_CARRIER;

	if (nxt6000_readreg(state, VIT_SYNC_STATUS) & VITINSYNC)
		*status |= FE_HAS_VITERBI;

	if (nxt6000_readreg(state, RS_COR_STAT) & RSCORESTATUS)
		*status |= FE_HAS_SYNC;

	if ((core_status & TPSLOCKED) && (*status == (FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)))
		*status |= FE_HAS_LOCK;

	if (debug)
		nxt6000_dump_status(state);

	return 0;
}

static int nxt6000_init(struct dvb_frontend* fe)
{
	struct nxt6000_state* state = fe->demodulator_priv;

	nxt6000_reset(state);
	nxt6000_setup(fe);

	return 0;
}

static int nxt6000_set_frontend(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct nxt6000_state* state = fe->demodulator_priv;
	int result;

	if (fe->ops.tuner_ops.set_params) {
		fe->ops.tuner_ops.set_params(fe);
		if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
	}

	result = nxt6000_set_bandwidth(state, p->bandwidth_hz);
	if (result < 0)
		return result;

	result = nxt6000_set_guard_interval(state, p->guard_interval);
	if (result < 0)
		return result;

	result = nxt6000_set_transmission_mode(state, p->transmission_mode);
	if (result < 0)
		return result;

	result = nxt6000_set_inversion(state, p->inversion);
	if (result < 0)
		return result;

	msleep(500);
	return 0;
}

static void nxt6000_release(struct dvb_frontend* fe)
{
	struct nxt6000_state* state = fe->demodulator_priv;
	kfree(state);
}

static int nxt6000_read_snr(struct dvb_frontend* fe, u16* snr)
{
	struct nxt6000_state* state = fe->demodulator_priv;

	*snr = nxt6000_readreg( state, OFDM_CHC_SNR) / 8;

	return 0;
}

static int nxt6000_read_ber(struct dvb_frontend* fe, u32* ber)
{
	struct nxt6000_state* state = fe->demodulator_priv;

	nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18 );

	*ber = (nxt6000_readreg( state, VIT_BER_1 ) << 8 ) |
		nxt6000_readreg( state, VIT_BER_0 );

	nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18); // Clear BER Done interrupts

	return 0;
}

static int nxt6000_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
{
	struct nxt6000_state* state = fe->demodulator_priv;

	*signal_strength = (short) (511 -
		(nxt6000_readreg(state, AGC_GAIN_1) +
		((nxt6000_readreg(state, AGC_GAIN_2) & 0x03) << 8)));

	return 0;
}

static int nxt6000_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
	tune->min_delay_ms = 500;
	return 0;
}

static int nxt6000_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
{
	struct nxt6000_state* state = fe->demodulator_priv;

	if (enable) {
		return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x01);
	} else {
		return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x00);
	}
}

static 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 struct dvb_frontend_ops nxt6000_ops = {
	.delsys = { SYS_DVBT },
	.info = {
		.name = "NxtWave NXT6000 DVB-T",
		.frequency_min = 0,
		.frequency_max = 863250000,
		.frequency_stepsize = 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);
Commit	Line	Data
1da177e4 LT	1	/*
	2	NxtWave Communications - NXT6000 demodulator driver
	3
	4	Copyright (C) 2002-2003 Florian Schirmer <jolt@tuxbox.org>
	5	Copyright (C) 2003 Paul Andreassen <paul@andreassen.com.au>
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
	22	#include <linux/init.h>
	23	#include <linux/kernel.h>
	24	#include <linux/module.h>
	25	#include <linux/string.h>
	26	#include <linux/slab.h>
	27
	28	#include "dvb_frontend.h"
	29	#include "nxt6000_priv.h"
	30	#include "nxt6000.h"
	31
	32
	33
	34	struct nxt6000_state {
	35	struct i2c_adapter* i2c;
1da177e4 LT	36	/* configuration settings */
	37	const struct nxt6000_config* config;
	38	struct dvb_frontend frontend;
	39	};
	40
ff699e6b	41	static int debug;
1da177e4 LT	42	#define dprintk if (debug) printk
	43
	44	static int nxt6000_writereg(struct nxt6000_state* state, u8 reg, u8 data)
	45	{
	46	u8 buf[] = { reg, data };
	47	struct i2c_msg msg = {.addr = state->config->demod_address,.flags = 0,.buf = buf,.len = 2 };
	48	int ret;
	49
	50	if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1)
	51	dprintk("nxt6000: nxt6000_write error (reg: 0x%02X, data: 0x%02X, ret: %d)\n", reg, data, ret);
	52
7464aa50	53	return (ret != 1) ? -EIO : 0;
1da177e4 LT	54	}
	55
	56	static u8 nxt6000_readreg(struct nxt6000_state* state, u8 reg)
	57	{
	58	int ret;
	59	u8 b0[] = { reg };
	60	u8 b1[] = { 0 };
	61	struct i2c_msg msgs[] = {
	62	{.addr = state->config->demod_address,.flags = 0,.buf = b0,.len = 1},
	63	{.addr = state->config->demod_address,.flags = I2C_M_RD,.buf = b1,.len = 1}
	64	};
	65
	66	ret = i2c_transfer(state->i2c, msgs, 2);
	67
	68	if (ret != 2)
	69	dprintk("nxt6000: nxt6000_read error (reg: 0x%02X, ret: %d)\n", reg, ret);
	70
	71	return b1[0];
	72	}
	73
	74	static void nxt6000_reset(struct nxt6000_state* state)
	75	{
	76	u8 val;
	77
	78	val = nxt6000_readreg(state, OFDM_COR_CTL);
	79
	80	nxt6000_writereg(state, OFDM_COR_CTL, val & ~COREACT);
	81	nxt6000_writereg(state, OFDM_COR_CTL, val \| COREACT);
	82	}
	83
80b5b745	84	static int nxt6000_set_bandwidth(struct nxt6000_state *state, u32 bandwidth)
1da177e4 LT	85	{
	86	u16 nominal_rate;
	87	int result;
	88
	89	switch (bandwidth) {
80b5b745	90	case 6000000:
1da177e4 LT	91	nominal_rate = 0x55B7;
	92	break;
	93
80b5b745	94	case 7000000:
1da177e4 LT	95	nominal_rate = 0x6400;
	96	break;
	97
80b5b745	98	case 8000000:
1da177e4 LT	99	nominal_rate = 0x7249;
	100	break;
	101
	102	default:
	103	return -EINVAL;
	104	}
	105
	106	if ((result = nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, nominal_rate & 0xFF)) < 0)
	107	return result;
	108
	109	return nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, (nominal_rate >> 8) & 0xFF);
	110	}
	111
0df289a2 MCC	112	static int nxt6000_set_guard_interval(struct nxt6000_state *state,
0df289a2 MCC	113	enum fe_guard_interval guard_interval)
1da177e4 LT	114	{
	115	switch (guard_interval) {
	116
	117	case GUARD_INTERVAL_1_32:
	118	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x00 \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
	119
	120	case GUARD_INTERVAL_1_16:
	121	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x01 \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
	122
	123	case GUARD_INTERVAL_AUTO:
	124	case GUARD_INTERVAL_1_8:
	125	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x02 \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
	126
	127	case GUARD_INTERVAL_1_4:
	128	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x03 \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
	129
	130	default:
	131	return -EINVAL;
	132	}
	133	}
	134
0df289a2 MCC	135	static int nxt6000_set_inversion(struct nxt6000_state *state,
0df289a2 MCC	136	enum fe_spectral_inversion inversion)
1da177e4 LT	137	{
	138	switch (inversion) {
	139
	140	case INVERSION_OFF:
	141	return nxt6000_writereg(state, OFDM_ITB_CTL, 0x00);
	142
	143	case INVERSION_ON:
	144	return nxt6000_writereg(state, OFDM_ITB_CTL, ITBINV);
	145
	146	default:
	147	return -EINVAL;
	148
	149	}
	150	}
	151
0df289a2 MCC	152	static int
	153	nxt6000_set_transmission_mode(struct nxt6000_state *state,
	154	enum fe_transmit_mode transmission_mode)
1da177e4 LT	155	{
	156	int result;
	157
	158	switch (transmission_mode) {
	159
	160	case TRANSMISSION_MODE_2K:
	161	if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x00 \| (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
	162	return result;
	163
	164	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x00 << 2) \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
	165
	166	case TRANSMISSION_MODE_8K:
	167	case TRANSMISSION_MODE_AUTO:
	168	if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x02 \| (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
	169	return result;
	170
	171	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x01 << 2) \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
	172
	173	default:
	174	return -EINVAL;
	175
	176	}
	177	}
	178
	179	static void nxt6000_setup(struct dvb_frontend* fe)
	180	{
b8742700	181	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	182
	183	nxt6000_writereg(state, RS_COR_SYNC_PARAM, SYNC_PARAM);
	184	nxt6000_writereg(state, BER_CTRL, /(1 << 2) \| / (0x01 << 1) \| 0x01);
3a4a5711 JS	185	nxt6000_writereg(state, VIT_BERTIME_2, 0x00); // BER Timer = 0x000200 * 256 = 131072 bits
	186	nxt6000_writereg(state, VIT_BERTIME_1, 0x02); //
	187	nxt6000_writereg(state, VIT_BERTIME_0, 0x00); //
	188	nxt6000_writereg(state, VIT_COR_INTEN, 0x98); // Enable BER interrupts
	189	nxt6000_writereg(state, VIT_COR_CTL, 0x82); // Enable BER measurement
	190	nxt6000_writereg(state, VIT_COR_CTL, VIT_COR_RESYNC \| 0x02 );
1da177e4 LT	191	nxt6000_writereg(state, OFDM_COR_CTL, (0x01 << 5) \| (nxt6000_readreg(state, OFDM_COR_CTL) & 0x0F));
	192	nxt6000_writereg(state, OFDM_COR_MODEGUARD, FORCEMODE8K \| 0x02);
	193	nxt6000_writereg(state, OFDM_AGC_CTL, AGCLAST \| INITIAL_AGC_BW);
	194	nxt6000_writereg(state, OFDM_ITB_FREQ_1, 0x06);
	195	nxt6000_writereg(state, OFDM_ITB_FREQ_2, 0x31);
	196	nxt6000_writereg(state, OFDM_CAS_CTL, (0x01 << 7) \| (0x02 << 3) \| 0x04);
	197	nxt6000_writereg(state, CAS_FREQ, 0xBB); /* CHECKME */
	198	nxt6000_writereg(state, OFDM_SYR_CTL, 1 << 2);
	199	nxt6000_writereg(state, OFDM_PPM_CTL_1, PPM256);
	200	nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, 0x49);
	201	nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, 0x72);
	202	nxt6000_writereg(state, ANALOG_CONTROL_0, 1 << 5);
	203	nxt6000_writereg(state, EN_DMD_RACQ, (1 << 7) \| (3 << 4) \| 2);
	204	nxt6000_writereg(state, DIAG_CONFIG, TB_SET);
	205
	206	if (state->config->clock_inversion)
	207	nxt6000_writereg(state, SUB_DIAG_MODE_SEL, CLKINVERSION);
	208	else
	209	nxt6000_writereg(state, SUB_DIAG_MODE_SEL, 0);
	210
	211	nxt6000_writereg(state, TS_FORMAT, 0);
1da177e4 LT	212	}
	213
	214	static void nxt6000_dump_status(struct nxt6000_state *state)
	215	{
	216	u8 val;
	217
	218	/*
	219	printk("RS_COR_STAT: 0x%02X\n", nxt6000_readreg(fe, RS_COR_STAT));
	220	printk("VIT_SYNC_STATUS: 0x%02X\n", nxt6000_readreg(fe, VIT_SYNC_STATUS));
	221	printk("OFDM_COR_STAT: 0x%02X\n", nxt6000_readreg(fe, OFDM_COR_STAT));
	222	printk("OFDM_SYR_STAT: 0x%02X\n", nxt6000_readreg(fe, OFDM_SYR_STAT));
	223	printk("OFDM_TPS_RCVD_1: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_1));
	224	printk("OFDM_TPS_RCVD_2: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_2));
	225	printk("OFDM_TPS_RCVD_3: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_3));
	226	printk("OFDM_TPS_RCVD_4: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_4));
	227	printk("OFDM_TPS_RESERVED_1: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RESERVED_1));
	228	printk("OFDM_TPS_RESERVED_2: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RESERVED_2));
	229	*/
	230	printk("NXT6000 status:");
	231
	232	val = nxt6000_readreg(state, RS_COR_STAT);
	233
	234	printk(" DATA DESCR LOCK: %d,", val & 0x01);
	235	printk(" DATA SYNC LOCK: %d,", (val >> 1) & 0x01);
	236
	237	val = nxt6000_readreg(state, VIT_SYNC_STATUS);
	238
	239	printk(" VITERBI LOCK: %d,", (val >> 7) & 0x01);
	240
	241	switch ((val >> 4) & 0x07) {
	242
	243	case 0x00:
	244	printk(" VITERBI CODERATE: 1/2,");
	245	break;
	246
	247	case 0x01:
	248	printk(" VITERBI CODERATE: 2/3,");
	249	break;
	250
	251	case 0x02:
	252	printk(" VITERBI CODERATE: 3/4,");
	253	break;
	254
	255	case 0x03:
	256	printk(" VITERBI CODERATE: 5/6,");
	257	break;
	258
	259	case 0x04:
	260	printk(" VITERBI CODERATE: 7/8,");
	261	break;
	262
	263	default:
	264	printk(" VITERBI CODERATE: Reserved,");
	265
	266	}
	267
	268	val = nxt6000_readreg(state, OFDM_COR_STAT);
	269
	270	printk(" CHCTrack: %d,", (val >> 7) & 0x01);
	271	printk(" TPSLock: %d,", (val >> 6) & 0x01);
	272	printk(" SYRLock: %d,", (val >> 5) & 0x01);
	273	printk(" AGCLock: %d,", (val >> 4) & 0x01);
	274
	275	switch (val & 0x0F) {
276
277	case 0x00:
278	printk(" CoreState: IDLE,");
279	break;
280
281	case 0x02:
282	printk(" CoreState: WAIT_AGC,");
283	break;
284
285	case 0x03:
286	printk(" CoreState: WAIT_SYR,");
287	break;
288
289	case 0x04:
290	printk(" CoreState: WAIT_PPM,");
291	break;
292
293	case 0x01:
294	printk(" CoreState: WAIT_TRL,");
295	break;
296
297	case 0x05:
298	printk(" CoreState: WAIT_TPS,");
299	break;
300
301	case 0x06:
302	printk(" CoreState: MONITOR_TPS,");
303	break;
304
305	default:
306	printk(" CoreState: Reserved,");
307
308	}
309
310	val = nxt6000_readreg(state, OFDM_SYR_STAT);
311
312	printk(" SYRLock: %d,", (val >> 4) & 0x01);
313	printk(" SYRMode: %s,", (val >> 2) & 0x01 ? "8K" : "2K");
314
315	switch ((val >> 4) & 0x03) {
316
317	case 0x00:
318	printk(" SYRGuard: 1/32,");
319	break;
320
321	case 0x01:
322	printk(" SYRGuard: 1/16,");
323	break;
324
325	case 0x02:
326	printk(" SYRGuard: 1/8,");
327	break;
328
329	case 0x03:
330	printk(" SYRGuard: 1/4,");
331	break;
332	}
333
334	val = nxt6000_readreg(state, OFDM_TPS_RCVD_3);
335
336	switch ((val >> 4) & 0x07) {
337
338	case 0x00:
339	printk(" TPSLP: 1/2,");
340	break;
341
342	case 0x01:
343	printk(" TPSLP: 2/3,");
344	break;
345
346	case 0x02:
347	printk(" TPSLP: 3/4,");
348	break;
349
350	case 0x03:
351	printk(" TPSLP: 5/6,");
352	break;
353
354	case 0x04:
355	printk(" TPSLP: 7/8,");
356	break;
357
358	default:
359	printk(" TPSLP: Reserved,");
360
361	}
362
363	switch (val & 0x07) {
364
365	case 0x00:
366	printk(" TPSHP: 1/2,");
367	break;
368
369	case 0x01:
370	printk(" TPSHP: 2/3,");
371	break;
372
373	case 0x02:
374	printk(" TPSHP: 3/4,");
375	break;
376
377	case 0x03:
378	printk(" TPSHP: 5/6,");
379	break;
380
381	case 0x04:
382	printk(" TPSHP: 7/8,");
383	break;
384
385	default:
386	printk(" TPSHP: Reserved,");
387
388	}
389
390	val = nxt6000_readreg(state, OFDM_TPS_RCVD_4);
391
392	printk(" TPSMode: %s,", val & 0x01 ? "8K" : "2K");
393
394	switch ((val >> 4) & 0x03) {
395
396	case 0x00:
397	printk(" TPSGuard: 1/32,");
398	break;
399
400	case 0x01:
401	printk(" TPSGuard: 1/16,");
402	break;
403
404	case 0x02:
405	printk(" TPSGuard: 1/8,");
406	break;
407
408	case 0x03:
409	printk(" TPSGuard: 1/4,");
410	break;
411
412	}
413
414	/* Strange magic required to gain access to RF_AGC_STATUS */
415	nxt6000_readreg(state, RF_AGC_VAL_1);
416	val = nxt6000_readreg(state, RF_AGC_STATUS);
417	val = nxt6000_readreg(state, RF_AGC_STATUS);
418
419	printk(" RF AGC LOCK: %d,", (val >> 4) & 0x01);
420	printk("\n");
421	}
422
0df289a2	423	static int nxt6000_read_status(struct dvb_frontend fe, enum fe_status status)
1da177e4 LT	424	{
1da177e4 LT	425	u8 core_status;
b8742700	426	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	427
	428	*status = 0;
	429
	430	core_status = nxt6000_readreg(state, OFDM_COR_STAT);
	431
	432	if (core_status & AGCLOCKED)
	433	*status \|= FE_HAS_SIGNAL;
	434
	435	if (nxt6000_readreg(state, OFDM_SYR_STAT) & GI14_SYR_LOCK)
	436	*status \|= FE_HAS_CARRIER;
	437
	438	if (nxt6000_readreg(state, VIT_SYNC_STATUS) & VITINSYNC)
	439	*status \|= FE_HAS_VITERBI;
	440
	441	if (nxt6000_readreg(state, RS_COR_STAT) & RSCORESTATUS)
	442	*status \|= FE_HAS_SYNC;
	443
	444	if ((core_status & TPSLOCKED) && (*status == (FE_HAS_SIGNAL \| FE_HAS_CARRIER \| FE_HAS_VITERBI \| FE_HAS_SYNC)))
	445	*status \|= FE_HAS_LOCK;
	446
	447	if (debug)
	448	nxt6000_dump_status(state);
	449
	450	return 0;
	451	}
	452
	453	static int nxt6000_init(struct dvb_frontend* fe)
	454	{
b8742700	455	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	456
	457	nxt6000_reset(state);
	458	nxt6000_setup(fe);
	459
	460	return 0;
	461	}
	462
80b5b745	463	static int nxt6000_set_frontend(struct dvb_frontend *fe)
1da177e4	464	{
80b5b745	465	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
b8742700	466	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	467	int result;
1da177e4 LT	468
dea74869	469	if (fe->ops.tuner_ops.set_params) {
14d24d14	470	fe->ops.tuner_ops.set_params(fe);
dea74869	471	if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
605ee41c	472	}
1da177e4	473
80b5b745 MCC	474	result = nxt6000_set_bandwidth(state, p->bandwidth_hz);
80b5b745 MCC	475	if (result < 0)
1da177e4	476	return result;
80b5b745 MCC	477
	478	result = nxt6000_set_guard_interval(state, p->guard_interval);
	479	if (result < 0)
1da177e4	480	return result;
80b5b745 MCC	481
	482	result = nxt6000_set_transmission_mode(state, p->transmission_mode);
	483	if (result < 0)
1da177e4	484	return result;
80b5b745 MCC	485
	486	result = nxt6000_set_inversion(state, p->inversion);
	487	if (result < 0)
1da177e4 LT	488	return result;
1da177e4 LT	489
115eea4e	490	msleep(500);
1da177e4 LT	491	return 0;
	492	}
	493
	494	static void nxt6000_release(struct dvb_frontend* fe)
	495	{
b8742700	496	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	497	kfree(state);
	498	}
	499
3a4a5711 JS	500	static int nxt6000_read_snr(struct dvb_frontend* fe, u16* snr)
3a4a5711 JS	501	{
b8742700	502	struct nxt6000_state* state = fe->demodulator_priv;
3a4a5711 JS	503
	504	*snr = nxt6000_readreg( state, OFDM_CHC_SNR) / 8;
	505
	506	return 0;
	507	}
	508
	509	static int nxt6000_read_ber(struct dvb_frontend* fe, u32* ber)
	510	{
b8742700	511	struct nxt6000_state* state = fe->demodulator_priv;
3a4a5711 JS	512
	513	nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18 );
	514
	515	*ber = (nxt6000_readreg( state, VIT_BER_1 ) << 8 ) \|
	516	nxt6000_readreg( state, VIT_BER_0 );
	517
	518	nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18); // Clear BER Done interrupts
	519
	520	return 0;
	521	}
	522
	523	static int nxt6000_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
	524	{
b8742700	525	struct nxt6000_state* state = fe->demodulator_priv;
3a4a5711 JS	526
	527	*signal_strength = (short) (511 -
	528	(nxt6000_readreg(state, AGC_GAIN_1) +
	529	((nxt6000_readreg(state, AGC_GAIN_2) & 0x03) << 8)));
	530
	531	return 0;
	532	}
	533
115eea4e SO	534	static int nxt6000_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
	535	{
	536	tune->min_delay_ms = 500;
	537	return 0;
	538	}
	539
605ee41c AQ	540	static int nxt6000_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
	541	{
	542	struct nxt6000_state* state = fe->demodulator_priv;
	543
	544	if (enable) {
	545	return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x01);
	546	} else {
	547	return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x00);
	548	}
	549	}
	550
1da177e4 LT	551	static struct dvb_frontend_ops nxt6000_ops;
	552
	553	struct dvb_frontend* nxt6000_attach(const struct nxt6000_config* config,
	554	struct i2c_adapter* i2c)
	555	{
	556	struct nxt6000_state* state = NULL;
	557
	558	/* allocate memory for the internal state */
084e24ac	559	state = kzalloc(sizeof(struct nxt6000_state), GFP_KERNEL);
1da177e4 LT	560	if (state == NULL) goto error;
	561
	562	/* setup the state */
	563	state->config = config;
	564	state->i2c = i2c;
1da177e4 LT	565
	566	/* check if the demod is there */
	567	if (nxt6000_readreg(state, OFDM_MSC_REV) != NXT6000ASICDEVICE) goto error;
	568
	569	/* create dvb_frontend */
dea74869	570	memcpy(&state->frontend.ops, &nxt6000_ops, sizeof(struct dvb_frontend_ops));
1da177e4 LT	571	state->frontend.demodulator_priv = state;
	572	return &state->frontend;
	573
	574	error:
	575	kfree(state);
	576	return NULL;
	577	}
	578
	579	static struct dvb_frontend_ops nxt6000_ops = {
80b5b745	580	.delsys = { SYS_DVBT },
1da177e4 LT	581	.info = {
1da177e4 LT	582	.name = "NxtWave NXT6000 DVB-T",
1da177e4 LT	583	.frequency_min = 0,
	584	.frequency_max = 863250000,
	585	.frequency_stepsize = 62500,
	586	/.frequency_tolerance = //* FIXME: 12% of SR */
	587	.symbol_rate_min = 0, /* FIXME */
	588	.symbol_rate_max = 9360000, /* FIXME */
	589	.symbol_rate_tolerance = 4000,
	590	.caps = FE_CAN_FEC_1_2 \| FE_CAN_FEC_2_3 \| FE_CAN_FEC_3_4 \|
50c25fff MK	591	FE_CAN_FEC_4_5 \| FE_CAN_FEC_5_6 \| FE_CAN_FEC_6_7 \|
	592	FE_CAN_FEC_7_8 \| FE_CAN_FEC_8_9 \| FE_CAN_FEC_AUTO \|
	593	FE_CAN_QAM_16 \| FE_CAN_QAM_64 \| FE_CAN_QAM_AUTO \|
	594	FE_CAN_TRANSMISSION_MODE_AUTO \| FE_CAN_GUARD_INTERVAL_AUTO \|
	595	FE_CAN_HIERARCHY_AUTO,
1da177e4 LT	596	},
	597
	598	.release = nxt6000_release,
	599
	600	.init = nxt6000_init,
605ee41c	601	.i2c_gate_ctrl = nxt6000_i2c_gate_ctrl,
1da177e4	602
115eea4e SO	603	.get_tune_settings = nxt6000_fe_get_tune_settings,
115eea4e SO	604
80b5b745	605	.set_frontend = nxt6000_set_frontend,
1da177e4 LT	606
1da177e4 LT	607	.read_status = nxt6000_read_status,
3a4a5711 JS	608	.read_ber = nxt6000_read_ber,
	609	.read_signal_strength = nxt6000_read_signal_strength,
	610	.read_snr = nxt6000_read_snr,
1da177e4 LT	611	};
	612
	613	module_param(debug, int, 0644);
	614	MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
	615
	616	MODULE_DESCRIPTION("NxtWave NXT6000 DVB-T demodulator driver");
	617	MODULE_AUTHOR("Florian Schirmer");
	618	MODULE_LICENSE("GPL");
	619
	620	EXPORT_SYMBOL(nxt6000_attach);