[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;
	struct dvb_frontend_ops ops;
	/* configuration settings */
	const struct nxt6000_config* config;
	struct dvb_frontend frontend;
};

static int debug = 0;
#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) ? -EFAULT : 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, fe_bandwidth_t bandwidth)
{
	u16 nominal_rate;
	int result;

	switch (bandwidth) {

	case BANDWIDTH_6_MHZ:
		nominal_rate = 0x55B7;
		break;

	case BANDWIDTH_7_MHZ:
		nominal_rate = 0x6400;
		break;

	case BANDWIDTH_8_MHZ:
		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, fe_guard_interval_t 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, fe_spectral_inversion_t 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, fe_transmit_mode_t 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, fe_status_t* 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 dvb_frontend_parameters *param)
{
	struct nxt6000_state* state = fe->demodulator_priv;
	int result;

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

	if ((result = nxt6000_set_bandwidth(state, param->u.ofdm.bandwidth)) < 0)
		return result;
	if ((result = nxt6000_set_guard_interval(state, param->u.ofdm.guard_interval)) < 0)
		return result;
	if ((result = nxt6000_set_transmission_mode(state, param->u.ofdm.transmission_mode)) < 0)
		return result;
	if ((result = nxt6000_set_inversion(state, param->inversion)) < 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 = kmalloc(sizeof(struct nxt6000_state), GFP_KERNEL);
	if (state == NULL) goto error;

	/* setup the state */
	state->config = config;
	state->i2c = i2c;
	memcpy(&state->ops, &nxt6000_ops, sizeof(struct dvb_frontend_ops));

	/* check if the demod is there */
	if (nxt6000_readreg(state, OFDM_MSC_REV) != NXT6000ASICDEVICE) goto error;

	/* create dvb_frontend */
	state->frontend.ops = &state->ops;
	state->frontend.demodulator_priv = state;
	return &state->frontend;

error:
	kfree(state);
	return NULL;
}

static struct dvb_frontend_ops nxt6000_ops = {

	.info = {
		.name = "NxtWave NXT6000 DVB-T",
		.type = FE_OFDM,
		.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;
	36	struct dvb_frontend_ops ops;
	37	/* configuration settings */
	38	const struct nxt6000_config* config;
	39	struct dvb_frontend frontend;
	40	};
	41
	42	static int debug = 0;
	43	#define dprintk if (debug) printk
	44
	45	static int nxt6000_writereg(struct nxt6000_state* state, u8 reg, u8 data)
	46	{
	47	u8 buf[] = { reg, data };
	48	struct i2c_msg msg = {.addr = state->config->demod_address,.flags = 0,.buf = buf,.len = 2 };
	49	int ret;
	50
	51	if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1)
	52	dprintk("nxt6000: nxt6000_write error (reg: 0x%02X, data: 0x%02X, ret: %d)\n", reg, data, ret);
	53
	54	return (ret != 1) ? -EFAULT : 0;
	55	}
	56
	57	static u8 nxt6000_readreg(struct nxt6000_state* state, u8 reg)
	58	{
	59	int ret;
	60	u8 b0[] = { reg };
	61	u8 b1[] = { 0 };
	62	struct i2c_msg msgs[] = {
	63	{.addr = state->config->demod_address,.flags = 0,.buf = b0,.len = 1},
	64	{.addr = state->config->demod_address,.flags = I2C_M_RD,.buf = b1,.len = 1}
65	};
66
67	ret = i2c_transfer(state->i2c, msgs, 2);
68
69	if (ret != 2)
70	dprintk("nxt6000: nxt6000_read error (reg: 0x%02X, ret: %d)\n", reg, ret);
71
72	return b1[0];
73	}
74
75	static void nxt6000_reset(struct nxt6000_state* state)
76	{
77	u8 val;
78
79	val = nxt6000_readreg(state, OFDM_COR_CTL);
80
81	nxt6000_writereg(state, OFDM_COR_CTL, val & ~COREACT);
82	nxt6000_writereg(state, OFDM_COR_CTL, val \| COREACT);
83	}
84
85	static int nxt6000_set_bandwidth(struct nxt6000_state* state, fe_bandwidth_t bandwidth)
86	{
87	u16 nominal_rate;
88	int result;
89
90	switch (bandwidth) {
91
92	case BANDWIDTH_6_MHZ:
93	nominal_rate = 0x55B7;
94	break;
95
96	case BANDWIDTH_7_MHZ:
97	nominal_rate = 0x6400;
98	break;
99
100	case BANDWIDTH_8_MHZ:
101	nominal_rate = 0x7249;
102	break;
103
104	default:
105	return -EINVAL;
106	}
107
108	if ((result = nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, nominal_rate & 0xFF)) < 0)
109	return result;
110
111	return nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, (nominal_rate >> 8) & 0xFF);
112	}
113
114	static int nxt6000_set_guard_interval(struct nxt6000_state* state, fe_guard_interval_t guard_interval)
115	{
116	switch (guard_interval) {
117
118	case GUARD_INTERVAL_1_32:
119	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x00 \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
120
121	case GUARD_INTERVAL_1_16:
122	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x01 \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
123
124	case GUARD_INTERVAL_AUTO:
125	case GUARD_INTERVAL_1_8:
126	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x02 \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
127
128	case GUARD_INTERVAL_1_4:
129	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, 0x03 \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x03));
130
131	default:
132	return -EINVAL;
133	}
134	}
135
136	static int nxt6000_set_inversion(struct nxt6000_state* state, fe_spectral_inversion_t inversion)
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
152	static int nxt6000_set_transmission_mode(struct nxt6000_state* state, fe_transmit_mode_t transmission_mode)
153	{
154	int result;
155
156	switch (transmission_mode) {
157
158	case TRANSMISSION_MODE_2K:
159	if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x00 \| (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
160	return result;
161
162	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x00 << 2) \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
163
164	case TRANSMISSION_MODE_8K:
165	case TRANSMISSION_MODE_AUTO:
166	if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x02 \| (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
167	return result;
168
169	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x01 << 2) \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
170
171	default:
172	return -EINVAL;
173
174	}
175	}
176
177	static void nxt6000_setup(struct dvb_frontend* fe)
178	{
b8742700	179	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	180
	181	nxt6000_writereg(state, RS_COR_SYNC_PARAM, SYNC_PARAM);
	182	nxt6000_writereg(state, BER_CTRL, /(1 << 2) \| / (0x01 << 1) \| 0x01);
3a4a5711 JS	183	nxt6000_writereg(state, VIT_BERTIME_2, 0x00); // BER Timer = 0x000200 * 256 = 131072 bits
	184	nxt6000_writereg(state, VIT_BERTIME_1, 0x02); //
	185	nxt6000_writereg(state, VIT_BERTIME_0, 0x00); //
	186	nxt6000_writereg(state, VIT_COR_INTEN, 0x98); // Enable BER interrupts
	187	nxt6000_writereg(state, VIT_COR_CTL, 0x82); // Enable BER measurement
	188	nxt6000_writereg(state, VIT_COR_CTL, VIT_COR_RESYNC \| 0x02 );
1da177e4 LT	189	nxt6000_writereg(state, OFDM_COR_CTL, (0x01 << 5) \| (nxt6000_readreg(state, OFDM_COR_CTL) & 0x0F));
	190	nxt6000_writereg(state, OFDM_COR_MODEGUARD, FORCEMODE8K \| 0x02);
	191	nxt6000_writereg(state, OFDM_AGC_CTL, AGCLAST \| INITIAL_AGC_BW);
	192	nxt6000_writereg(state, OFDM_ITB_FREQ_1, 0x06);
	193	nxt6000_writereg(state, OFDM_ITB_FREQ_2, 0x31);
	194	nxt6000_writereg(state, OFDM_CAS_CTL, (0x01 << 7) \| (0x02 << 3) \| 0x04);
	195	nxt6000_writereg(state, CAS_FREQ, 0xBB); /* CHECKME */
	196	nxt6000_writereg(state, OFDM_SYR_CTL, 1 << 2);
	197	nxt6000_writereg(state, OFDM_PPM_CTL_1, PPM256);
	198	nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, 0x49);
	199	nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, 0x72);
	200	nxt6000_writereg(state, ANALOG_CONTROL_0, 1 << 5);
	201	nxt6000_writereg(state, EN_DMD_RACQ, (1 << 7) \| (3 << 4) \| 2);
	202	nxt6000_writereg(state, DIAG_CONFIG, TB_SET);
	203
	204	if (state->config->clock_inversion)
	205	nxt6000_writereg(state, SUB_DIAG_MODE_SEL, CLKINVERSION);
	206	else
	207	nxt6000_writereg(state, SUB_DIAG_MODE_SEL, 0);
	208
	209	nxt6000_writereg(state, TS_FORMAT, 0);
1da177e4 LT	210	}
	211
	212	static void nxt6000_dump_status(struct nxt6000_state *state)
	213	{
	214	u8 val;
	215
	216	/*
	217	printk("RS_COR_STAT: 0x%02X\n", nxt6000_readreg(fe, RS_COR_STAT));
	218	printk("VIT_SYNC_STATUS: 0x%02X\n", nxt6000_readreg(fe, VIT_SYNC_STATUS));
	219	printk("OFDM_COR_STAT: 0x%02X\n", nxt6000_readreg(fe, OFDM_COR_STAT));
	220	printk("OFDM_SYR_STAT: 0x%02X\n", nxt6000_readreg(fe, OFDM_SYR_STAT));
	221	printk("OFDM_TPS_RCVD_1: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_1));
	222	printk("OFDM_TPS_RCVD_2: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_2));
	223	printk("OFDM_TPS_RCVD_3: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_3));
	224	printk("OFDM_TPS_RCVD_4: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_4));
	225	printk("OFDM_TPS_RESERVED_1: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RESERVED_1));
	226	printk("OFDM_TPS_RESERVED_2: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RESERVED_2));
	227	*/
	228	printk("NXT6000 status:");
	229
	230	val = nxt6000_readreg(state, RS_COR_STAT);
	231
	232	printk(" DATA DESCR LOCK: %d,", val & 0x01);
	233	printk(" DATA SYNC LOCK: %d,", (val >> 1) & 0x01);
	234
	235	val = nxt6000_readreg(state, VIT_SYNC_STATUS);
	236
	237	printk(" VITERBI LOCK: %d,", (val >> 7) & 0x01);
	238
	239	switch ((val >> 4) & 0x07) {
	240
	241	case 0x00:
	242	printk(" VITERBI CODERATE: 1/2,");
	243	break;
	244
	245	case 0x01:
	246	printk(" VITERBI CODERATE: 2/3,");
	247	break;
	248
	249	case 0x02:
	250	printk(" VITERBI CODERATE: 3/4,");
	251	break;
	252
	253	case 0x03:
	254	printk(" VITERBI CODERATE: 5/6,");
	255	break;
	256
	257	case 0x04:
	258	printk(" VITERBI CODERATE: 7/8,");
	259	break;
	260
	261	default:
	262	printk(" VITERBI CODERATE: Reserved,");
	263
	264	}
	265
	266	val = nxt6000_readreg(state, OFDM_COR_STAT);
	267
	268	printk(" CHCTrack: %d,", (val >> 7) & 0x01);
	269	printk(" TPSLock: %d,", (val >> 6) & 0x01);
	270	printk(" SYRLock: %d,", (val >> 5) & 0x01);
	271	printk(" AGCLock: %d,", (val >> 4) & 0x01);
	272
	273	switch (val & 0x0F) {
274
275	case 0x00:
276	printk(" CoreState: IDLE,");
277	break;
278
279	case 0x02:
280	printk(" CoreState: WAIT_AGC,");
281	break;
282
283	case 0x03:
284	printk(" CoreState: WAIT_SYR,");
285	break;
286
287	case 0x04:
288	printk(" CoreState: WAIT_PPM,");
289	break;
290
291	case 0x01:
292	printk(" CoreState: WAIT_TRL,");
293	break;
294
295	case 0x05:
296	printk(" CoreState: WAIT_TPS,");
297	break;
298
299	case 0x06:
300	printk(" CoreState: MONITOR_TPS,");
301	break;
302
303	default:
304	printk(" CoreState: Reserved,");
305
306	}
307
308	val = nxt6000_readreg(state, OFDM_SYR_STAT);
309
310	printk(" SYRLock: %d,", (val >> 4) & 0x01);
311	printk(" SYRMode: %s,", (val >> 2) & 0x01 ? "8K" : "2K");
312
313	switch ((val >> 4) & 0x03) {
314
315	case 0x00:
316	printk(" SYRGuard: 1/32,");
317	break;
318
319	case 0x01:
320	printk(" SYRGuard: 1/16,");
321	break;
322
323	case 0x02:
324	printk(" SYRGuard: 1/8,");
325	break;
326
327	case 0x03:
328	printk(" SYRGuard: 1/4,");
329	break;
330	}
331
332	val = nxt6000_readreg(state, OFDM_TPS_RCVD_3);
333
334	switch ((val >> 4) & 0x07) {
335
336	case 0x00:
337	printk(" TPSLP: 1/2,");
338	break;
339
340	case 0x01:
341	printk(" TPSLP: 2/3,");
342	break;
343
344	case 0x02:
345	printk(" TPSLP: 3/4,");
346	break;
347
348	case 0x03:
349	printk(" TPSLP: 5/6,");
350	break;
351
352	case 0x04:
353	printk(" TPSLP: 7/8,");
354	break;
355
356	default:
357	printk(" TPSLP: Reserved,");
358
359	}
360
361	switch (val & 0x07) {
362
363	case 0x00:
364	printk(" TPSHP: 1/2,");
365	break;
366
367	case 0x01:
368	printk(" TPSHP: 2/3,");
369	break;
370
371	case 0x02:
372	printk(" TPSHP: 3/4,");
373	break;
374
375	case 0x03:
376	printk(" TPSHP: 5/6,");
377	break;
378
379	case 0x04:
380	printk(" TPSHP: 7/8,");
381	break;
382
383	default:
384	printk(" TPSHP: Reserved,");
385
386	}
387
388	val = nxt6000_readreg(state, OFDM_TPS_RCVD_4);
389
390	printk(" TPSMode: %s,", val & 0x01 ? "8K" : "2K");
391
392	switch ((val >> 4) & 0x03) {
393
394	case 0x00:
395	printk(" TPSGuard: 1/32,");
396	break;
397
398	case 0x01:
399	printk(" TPSGuard: 1/16,");
400	break;
401
402	case 0x02:
403	printk(" TPSGuard: 1/8,");
404	break;
405
406	case 0x03:
407	printk(" TPSGuard: 1/4,");
408	break;
409
410	}
411
412	/* Strange magic required to gain access to RF_AGC_STATUS */
413	nxt6000_readreg(state, RF_AGC_VAL_1);
414	val = nxt6000_readreg(state, RF_AGC_STATUS);
415	val = nxt6000_readreg(state, RF_AGC_STATUS);
416
417	printk(" RF AGC LOCK: %d,", (val >> 4) & 0x01);
418	printk("\n");
419	}
420
421	static int nxt6000_read_status(struct dvb_frontend* fe, fe_status_t* status)
422	{
423	u8 core_status;
b8742700	424	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	425
	426	*status = 0;
	427
	428	core_status = nxt6000_readreg(state, OFDM_COR_STAT);
	429
	430	if (core_status & AGCLOCKED)
	431	*status \|= FE_HAS_SIGNAL;
	432
	433	if (nxt6000_readreg(state, OFDM_SYR_STAT) & GI14_SYR_LOCK)
	434	*status \|= FE_HAS_CARRIER;
	435
	436	if (nxt6000_readreg(state, VIT_SYNC_STATUS) & VITINSYNC)
	437	*status \|= FE_HAS_VITERBI;
	438
	439	if (nxt6000_readreg(state, RS_COR_STAT) & RSCORESTATUS)
	440	*status \|= FE_HAS_SYNC;
	441
	442	if ((core_status & TPSLOCKED) && (*status == (FE_HAS_SIGNAL \| FE_HAS_CARRIER \| FE_HAS_VITERBI \| FE_HAS_SYNC)))
	443	*status \|= FE_HAS_LOCK;
	444
	445	if (debug)
	446	nxt6000_dump_status(state);
	447
	448	return 0;
	449	}
	450
	451	static int nxt6000_init(struct dvb_frontend* fe)
	452	{
b8742700	453	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	454
	455	nxt6000_reset(state);
	456	nxt6000_setup(fe);
	457
	458	return 0;
	459	}
	460
	461	static int nxt6000_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *param)
	462	{
b8742700	463	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	464	int result;
1da177e4 LT	465
605ee41c AQ	466	if (fe->ops->tuner_ops.set_params) {
	467	fe->ops->tuner_ops.set_params(fe, param);
	468	if (fe->ops->i2c_gate_ctrl) fe->ops->i2c_gate_ctrl(fe, 0);
	469	}
1da177e4 LT	470
	471	if ((result = nxt6000_set_bandwidth(state, param->u.ofdm.bandwidth)) < 0)
	472	return result;
	473	if ((result = nxt6000_set_guard_interval(state, param->u.ofdm.guard_interval)) < 0)
	474	return result;
	475	if ((result = nxt6000_set_transmission_mode(state, param->u.ofdm.transmission_mode)) < 0)
	476	return result;
	477	if ((result = nxt6000_set_inversion(state, param->inversion)) < 0)
	478	return result;
	479
115eea4e	480	msleep(500);
1da177e4 LT	481	return 0;
	482	}
	483
	484	static void nxt6000_release(struct dvb_frontend* fe)
	485	{
b8742700	486	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	487	kfree(state);
	488	}
	489
3a4a5711 JS	490	static int nxt6000_read_snr(struct dvb_frontend* fe, u16* snr)
3a4a5711 JS	491	{
b8742700	492	struct nxt6000_state* state = fe->demodulator_priv;
3a4a5711 JS	493
	494	*snr = nxt6000_readreg( state, OFDM_CHC_SNR) / 8;
	495
	496	return 0;
	497	}
	498
	499	static int nxt6000_read_ber(struct dvb_frontend* fe, u32* ber)
	500	{
b8742700	501	struct nxt6000_state* state = fe->demodulator_priv;
3a4a5711 JS	502
	503	nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18 );
	504
	505	*ber = (nxt6000_readreg( state, VIT_BER_1 ) << 8 ) \|
	506	nxt6000_readreg( state, VIT_BER_0 );
	507
	508	nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18); // Clear BER Done interrupts
	509
	510	return 0;
	511	}
	512
	513	static int nxt6000_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
	514	{
b8742700	515	struct nxt6000_state* state = fe->demodulator_priv;
3a4a5711 JS	516
	517	*signal_strength = (short) (511 -
	518	(nxt6000_readreg(state, AGC_GAIN_1) +
	519	((nxt6000_readreg(state, AGC_GAIN_2) & 0x03) << 8)));
	520
	521	return 0;
	522	}
	523
115eea4e SO	524	static int nxt6000_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
	525	{
	526	tune->min_delay_ms = 500;
	527	return 0;
	528	}
	529
605ee41c AQ	530	static int nxt6000_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
	531	{
	532	struct nxt6000_state* state = fe->demodulator_priv;
	533
	534	if (enable) {
	535	return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x01);
	536	} else {
	537	return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x00);
	538	}
	539	}
	540
1da177e4 LT	541	static struct dvb_frontend_ops nxt6000_ops;
	542
	543	struct dvb_frontend* nxt6000_attach(const struct nxt6000_config* config,
	544	struct i2c_adapter* i2c)
	545	{
	546	struct nxt6000_state* state = NULL;
	547
	548	/* allocate memory for the internal state */
b8742700	549	state = kmalloc(sizeof(struct nxt6000_state), GFP_KERNEL);
1da177e4 LT	550	if (state == NULL) goto error;
	551
	552	/* setup the state */
	553	state->config = config;
	554	state->i2c = i2c;
	555	memcpy(&state->ops, &nxt6000_ops, sizeof(struct dvb_frontend_ops));
	556
	557	/* check if the demod is there */
	558	if (nxt6000_readreg(state, OFDM_MSC_REV) != NXT6000ASICDEVICE) goto error;
	559
	560	/* create dvb_frontend */
	561	state->frontend.ops = &state->ops;
	562	state->frontend.demodulator_priv = state;
	563	return &state->frontend;
	564
	565	error:
	566	kfree(state);
	567	return NULL;
	568	}
	569
	570	static struct dvb_frontend_ops nxt6000_ops = {
	571
	572	.info = {
	573	.name = "NxtWave NXT6000 DVB-T",
	574	.type = FE_OFDM,
	575	.frequency_min = 0,
	576	.frequency_max = 863250000,
	577	.frequency_stepsize = 62500,
	578	/.frequency_tolerance = //* FIXME: 12% of SR */
	579	.symbol_rate_min = 0, /* FIXME */
	580	.symbol_rate_max = 9360000, /* FIXME */
	581	.symbol_rate_tolerance = 4000,
	582	.caps = FE_CAN_FEC_1_2 \| FE_CAN_FEC_2_3 \| FE_CAN_FEC_3_4 \|
50c25fff MK	583	FE_CAN_FEC_4_5 \| FE_CAN_FEC_5_6 \| FE_CAN_FEC_6_7 \|
	584	FE_CAN_FEC_7_8 \| FE_CAN_FEC_8_9 \| FE_CAN_FEC_AUTO \|
	585	FE_CAN_QAM_16 \| FE_CAN_QAM_64 \| FE_CAN_QAM_AUTO \|
	586	FE_CAN_TRANSMISSION_MODE_AUTO \| FE_CAN_GUARD_INTERVAL_AUTO \|
	587	FE_CAN_HIERARCHY_AUTO,
1da177e4 LT	588	},
	589
	590	.release = nxt6000_release,
	591
	592	.init = nxt6000_init,
605ee41c	593	.i2c_gate_ctrl = nxt6000_i2c_gate_ctrl,
1da177e4	594
115eea4e SO	595	.get_tune_settings = nxt6000_fe_get_tune_settings,
115eea4e SO	596
1da177e4 LT	597	.set_frontend = nxt6000_set_frontend,
	598
	599	.read_status = nxt6000_read_status,
3a4a5711 JS	600	.read_ber = nxt6000_read_ber,
	601	.read_signal_strength = nxt6000_read_signal_strength,
	602	.read_snr = nxt6000_read_snr,
1da177e4 LT	603	};
	604
	605	module_param(debug, int, 0644);
	606	MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
	607
	608	MODULE_DESCRIPTION("NxtWave NXT6000 DVB-T demodulator driver");
	609	MODULE_AUTHOR("Florian Schirmer");
	610	MODULE_LICENSE("GPL");
	611
	612	EXPORT_SYMBOL(nxt6000_attach);