[mirror_ubuntu-kernels.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) ? -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;

	/* 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 = {

	.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;
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
	53	return (ret != 1) ? -EFAULT : 0;
	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
	84	static int nxt6000_set_bandwidth(struct nxt6000_state* state, fe_bandwidth_t bandwidth)
	85	{
	86	u16 nominal_rate;
	87	int result;
	88
	89	switch (bandwidth) {
	90
	91	case BANDWIDTH_6_MHZ:
	92	nominal_rate = 0x55B7;
	93	break;
	94
	95	case BANDWIDTH_7_MHZ:
	96	nominal_rate = 0x6400;
	97	break;
	98
	99	case BANDWIDTH_8_MHZ:
	100	nominal_rate = 0x7249;
	101	break;
	102
	103	default:
	104	return -EINVAL;
	105	}
106
107	if ((result = nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, nominal_rate & 0xFF)) < 0)
108	return result;
109
110	return nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, (nominal_rate >> 8) & 0xFF);
111	}
112
113	static int nxt6000_set_guard_interval(struct nxt6000_state* state, fe_guard_interval_t guard_interval)
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
135	static int nxt6000_set_inversion(struct nxt6000_state* state, fe_spectral_inversion_t inversion)
136	{
137	switch (inversion) {
138
139	case INVERSION_OFF:
140	return nxt6000_writereg(state, OFDM_ITB_CTL, 0x00);
141
142	case INVERSION_ON:
143	return nxt6000_writereg(state, OFDM_ITB_CTL, ITBINV);
144
145	default:
146	return -EINVAL;
147
148	}
149	}
150
151	static int nxt6000_set_transmission_mode(struct nxt6000_state* state, fe_transmit_mode_t transmission_mode)
152	{
153	int result;
154
155	switch (transmission_mode) {
156
157	case TRANSMISSION_MODE_2K:
158	if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x00 \| (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
159	return result;
160
161	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x00 << 2) \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
162
163	case TRANSMISSION_MODE_8K:
164	case TRANSMISSION_MODE_AUTO:
165	if ((result = nxt6000_writereg(state, EN_DMD_RACQ, 0x02 \| (nxt6000_readreg(state, EN_DMD_RACQ) & ~0x03))) < 0)
166	return result;
167
168	return nxt6000_writereg(state, OFDM_COR_MODEGUARD, (0x01 << 2) \| (nxt6000_readreg(state, OFDM_COR_MODEGUARD) & ~0x04));
169
170	default:
171	return -EINVAL;
172
173	}
174	}
175
176	static void nxt6000_setup(struct dvb_frontend* fe)
177	{
b8742700	178	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	179
	180	nxt6000_writereg(state, RS_COR_SYNC_PARAM, SYNC_PARAM);
	181	nxt6000_writereg(state, BER_CTRL, /(1 << 2) \| / (0x01 << 1) \| 0x01);
3a4a5711 JS	182	nxt6000_writereg(state, VIT_BERTIME_2, 0x00); // BER Timer = 0x000200 * 256 = 131072 bits
	183	nxt6000_writereg(state, VIT_BERTIME_1, 0x02); //
	184	nxt6000_writereg(state, VIT_BERTIME_0, 0x00); //
	185	nxt6000_writereg(state, VIT_COR_INTEN, 0x98); // Enable BER interrupts
	186	nxt6000_writereg(state, VIT_COR_CTL, 0x82); // Enable BER measurement
	187	nxt6000_writereg(state, VIT_COR_CTL, VIT_COR_RESYNC \| 0x02 );
1da177e4 LT	188	nxt6000_writereg(state, OFDM_COR_CTL, (0x01 << 5) \| (nxt6000_readreg(state, OFDM_COR_CTL) & 0x0F));
	189	nxt6000_writereg(state, OFDM_COR_MODEGUARD, FORCEMODE8K \| 0x02);
	190	nxt6000_writereg(state, OFDM_AGC_CTL, AGCLAST \| INITIAL_AGC_BW);
	191	nxt6000_writereg(state, OFDM_ITB_FREQ_1, 0x06);
	192	nxt6000_writereg(state, OFDM_ITB_FREQ_2, 0x31);
	193	nxt6000_writereg(state, OFDM_CAS_CTL, (0x01 << 7) \| (0x02 << 3) \| 0x04);
	194	nxt6000_writereg(state, CAS_FREQ, 0xBB); /* CHECKME */
	195	nxt6000_writereg(state, OFDM_SYR_CTL, 1 << 2);
	196	nxt6000_writereg(state, OFDM_PPM_CTL_1, PPM256);
	197	nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_1, 0x49);
	198	nxt6000_writereg(state, OFDM_TRL_NOMINALRATE_2, 0x72);
	199	nxt6000_writereg(state, ANALOG_CONTROL_0, 1 << 5);
	200	nxt6000_writereg(state, EN_DMD_RACQ, (1 << 7) \| (3 << 4) \| 2);
	201	nxt6000_writereg(state, DIAG_CONFIG, TB_SET);
	202
	203	if (state->config->clock_inversion)
	204	nxt6000_writereg(state, SUB_DIAG_MODE_SEL, CLKINVERSION);
	205	else
	206	nxt6000_writereg(state, SUB_DIAG_MODE_SEL, 0);
	207
	208	nxt6000_writereg(state, TS_FORMAT, 0);
1da177e4 LT	209	}
	210
	211	static void nxt6000_dump_status(struct nxt6000_state *state)
	212	{
	213	u8 val;
	214
	215	/*
	216	printk("RS_COR_STAT: 0x%02X\n", nxt6000_readreg(fe, RS_COR_STAT));
	217	printk("VIT_SYNC_STATUS: 0x%02X\n", nxt6000_readreg(fe, VIT_SYNC_STATUS));
	218	printk("OFDM_COR_STAT: 0x%02X\n", nxt6000_readreg(fe, OFDM_COR_STAT));
	219	printk("OFDM_SYR_STAT: 0x%02X\n", nxt6000_readreg(fe, OFDM_SYR_STAT));
	220	printk("OFDM_TPS_RCVD_1: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_1));
	221	printk("OFDM_TPS_RCVD_2: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_2));
	222	printk("OFDM_TPS_RCVD_3: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_3));
	223	printk("OFDM_TPS_RCVD_4: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_4));
	224	printk("OFDM_TPS_RESERVED_1: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RESERVED_1));
	225	printk("OFDM_TPS_RESERVED_2: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RESERVED_2));
	226	*/
	227	printk("NXT6000 status:");
	228
	229	val = nxt6000_readreg(state, RS_COR_STAT);
	230
	231	printk(" DATA DESCR LOCK: %d,", val & 0x01);
	232	printk(" DATA SYNC LOCK: %d,", (val >> 1) & 0x01);
	233
	234	val = nxt6000_readreg(state, VIT_SYNC_STATUS);
	235
	236	printk(" VITERBI LOCK: %d,", (val >> 7) & 0x01);
	237
	238	switch ((val >> 4) & 0x07) {
	239
	240	case 0x00:
	241	printk(" VITERBI CODERATE: 1/2,");
	242	break;
	243
	244	case 0x01:
	245	printk(" VITERBI CODERATE: 2/3,");
	246	break;
	247
	248	case 0x02:
	249	printk(" VITERBI CODERATE: 3/4,");
	250	break;
	251
	252	case 0x03:
	253	printk(" VITERBI CODERATE: 5/6,");
	254	break;
	255
	256	case 0x04:
	257	printk(" VITERBI CODERATE: 7/8,");
	258	break;
	259
	260	default:
	261	printk(" VITERBI CODERATE: Reserved,");
	262
	263	}
	264
	265	val = nxt6000_readreg(state, OFDM_COR_STAT);
	266
	267	printk(" CHCTrack: %d,", (val >> 7) & 0x01);
	268	printk(" TPSLock: %d,", (val >> 6) & 0x01);
	269	printk(" SYRLock: %d,", (val >> 5) & 0x01);
	270	printk(" AGCLock: %d,", (val >> 4) & 0x01);
	271
	272	switch (val & 0x0F) {
273
274	case 0x00:
275	printk(" CoreState: IDLE,");
276	break;
277
278	case 0x02:
279	printk(" CoreState: WAIT_AGC,");
280	break;
281
282	case 0x03:
283	printk(" CoreState: WAIT_SYR,");
284	break;
285
286	case 0x04:
287	printk(" CoreState: WAIT_PPM,");
288	break;
289
290	case 0x01:
291	printk(" CoreState: WAIT_TRL,");
292	break;
293
294	case 0x05:
295	printk(" CoreState: WAIT_TPS,");
296	break;
297
298	case 0x06:
299	printk(" CoreState: MONITOR_TPS,");
300	break;
301
302	default:
303	printk(" CoreState: Reserved,");
304
305	}
306
307	val = nxt6000_readreg(state, OFDM_SYR_STAT);
308
309	printk(" SYRLock: %d,", (val >> 4) & 0x01);
310	printk(" SYRMode: %s,", (val >> 2) & 0x01 ? "8K" : "2K");
311
312	switch ((val >> 4) & 0x03) {
313
314	case 0x00:
315	printk(" SYRGuard: 1/32,");
316	break;
317
318	case 0x01:
319	printk(" SYRGuard: 1/16,");
320	break;
321
322	case 0x02:
323	printk(" SYRGuard: 1/8,");
324	break;
325
326	case 0x03:
327	printk(" SYRGuard: 1/4,");
328	break;
329	}
330
331	val = nxt6000_readreg(state, OFDM_TPS_RCVD_3);
332
333	switch ((val >> 4) & 0x07) {
334
335	case 0x00:
336	printk(" TPSLP: 1/2,");
337	break;
338
339	case 0x01:
340	printk(" TPSLP: 2/3,");
341	break;
342
343	case 0x02:
344	printk(" TPSLP: 3/4,");
345	break;
346
347	case 0x03:
348	printk(" TPSLP: 5/6,");
349	break;
350
351	case 0x04:
352	printk(" TPSLP: 7/8,");
353	break;
354
355	default:
356	printk(" TPSLP: Reserved,");
357
358	}
359
360	switch (val & 0x07) {
361
362	case 0x00:
363	printk(" TPSHP: 1/2,");
364	break;
365
366	case 0x01:
367	printk(" TPSHP: 2/3,");
368	break;
369
370	case 0x02:
371	printk(" TPSHP: 3/4,");
372	break;
373
374	case 0x03:
375	printk(" TPSHP: 5/6,");
376	break;
377
378	case 0x04:
379	printk(" TPSHP: 7/8,");
380	break;
381
382	default:
383	printk(" TPSHP: Reserved,");
384
385	}
386
387	val = nxt6000_readreg(state, OFDM_TPS_RCVD_4);
388
389	printk(" TPSMode: %s,", val & 0x01 ? "8K" : "2K");
390
391	switch ((val >> 4) & 0x03) {
392
393	case 0x00:
394	printk(" TPSGuard: 1/32,");
395	break;
396
397	case 0x01:
398	printk(" TPSGuard: 1/16,");
399	break;
400
401	case 0x02:
402	printk(" TPSGuard: 1/8,");
403	break;
404
405	case 0x03:
406	printk(" TPSGuard: 1/4,");
407	break;
408
409	}
410
411	/* Strange magic required to gain access to RF_AGC_STATUS */
412	nxt6000_readreg(state, RF_AGC_VAL_1);
413	val = nxt6000_readreg(state, RF_AGC_STATUS);
414	val = nxt6000_readreg(state, RF_AGC_STATUS);
415
416	printk(" RF AGC LOCK: %d,", (val >> 4) & 0x01);
417	printk("\n");
418	}
419
420	static int nxt6000_read_status(struct dvb_frontend* fe, fe_status_t* status)
421	{
422	u8 core_status;
b8742700	423	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	424
	425	*status = 0;
	426
	427	core_status = nxt6000_readreg(state, OFDM_COR_STAT);
	428
	429	if (core_status & AGCLOCKED)
	430	*status \|= FE_HAS_SIGNAL;
	431
	432	if (nxt6000_readreg(state, OFDM_SYR_STAT) & GI14_SYR_LOCK)
	433	*status \|= FE_HAS_CARRIER;
	434
	435	if (nxt6000_readreg(state, VIT_SYNC_STATUS) & VITINSYNC)
	436	*status \|= FE_HAS_VITERBI;
	437
	438	if (nxt6000_readreg(state, RS_COR_STAT) & RSCORESTATUS)
	439	*status \|= FE_HAS_SYNC;
	440
	441	if ((core_status & TPSLOCKED) && (*status == (FE_HAS_SIGNAL \| FE_HAS_CARRIER \| FE_HAS_VITERBI \| FE_HAS_SYNC)))
	442	*status \|= FE_HAS_LOCK;
	443
	444	if (debug)
	445	nxt6000_dump_status(state);
	446
	447	return 0;
	448	}
	449
	450	static int nxt6000_init(struct dvb_frontend* fe)
	451	{
b8742700	452	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	453
	454	nxt6000_reset(state);
	455	nxt6000_setup(fe);
	456
	457	return 0;
	458	}
	459
	460	static int nxt6000_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *param)
	461	{
b8742700	462	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	463	int result;
1da177e4 LT	464
dea74869 PB	465	if (fe->ops.tuner_ops.set_params) {
	466	fe->ops.tuner_ops.set_params(fe, param);
	467	if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
605ee41c	468	}
1da177e4 LT	469
	470	if ((result = nxt6000_set_bandwidth(state, param->u.ofdm.bandwidth)) < 0)
	471	return result;
	472	if ((result = nxt6000_set_guard_interval(state, param->u.ofdm.guard_interval)) < 0)
	473	return result;
	474	if ((result = nxt6000_set_transmission_mode(state, param->u.ofdm.transmission_mode)) < 0)
	475	return result;
	476	if ((result = nxt6000_set_inversion(state, param->inversion)) < 0)
	477	return result;
	478
115eea4e	479	msleep(500);
1da177e4 LT	480	return 0;
	481	}
	482
	483	static void nxt6000_release(struct dvb_frontend* fe)
	484	{
b8742700	485	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	486	kfree(state);
	487	}
	488
3a4a5711 JS	489	static int nxt6000_read_snr(struct dvb_frontend* fe, u16* snr)
3a4a5711 JS	490	{
b8742700	491	struct nxt6000_state* state = fe->demodulator_priv;
3a4a5711 JS	492
	493	*snr = nxt6000_readreg( state, OFDM_CHC_SNR) / 8;
	494
	495	return 0;
	496	}
	497
	498	static int nxt6000_read_ber(struct dvb_frontend* fe, u32* ber)
	499	{
b8742700	500	struct nxt6000_state* state = fe->demodulator_priv;
3a4a5711 JS	501
	502	nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18 );
	503
	504	*ber = (nxt6000_readreg( state, VIT_BER_1 ) << 8 ) \|
	505	nxt6000_readreg( state, VIT_BER_0 );
	506
	507	nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18); // Clear BER Done interrupts
	508
	509	return 0;
	510	}
	511
	512	static int nxt6000_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
	513	{
b8742700	514	struct nxt6000_state* state = fe->demodulator_priv;
3a4a5711 JS	515
	516	*signal_strength = (short) (511 -
	517	(nxt6000_readreg(state, AGC_GAIN_1) +
	518	((nxt6000_readreg(state, AGC_GAIN_2) & 0x03) << 8)));
	519
	520	return 0;
	521	}
	522
115eea4e SO	523	static int nxt6000_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
	524	{
	525	tune->min_delay_ms = 500;
	526	return 0;
	527	}
	528
605ee41c AQ	529	static int nxt6000_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
	530	{
	531	struct nxt6000_state* state = fe->demodulator_priv;
	532
	533	if (enable) {
	534	return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x01);
	535	} else {
	536	return nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x00);
	537	}
	538	}
	539
1da177e4 LT	540	static struct dvb_frontend_ops nxt6000_ops;
	541
	542	struct dvb_frontend* nxt6000_attach(const struct nxt6000_config* config,
	543	struct i2c_adapter* i2c)
	544	{
	545	struct nxt6000_state* state = NULL;
	546
	547	/* allocate memory for the internal state */
b8742700	548	state = kmalloc(sizeof(struct nxt6000_state), GFP_KERNEL);
1da177e4 LT	549	if (state == NULL) goto error;
	550
	551	/* setup the state */
	552	state->config = config;
	553	state->i2c = i2c;
1da177e4 LT	554
	555	/* check if the demod is there */
	556	if (nxt6000_readreg(state, OFDM_MSC_REV) != NXT6000ASICDEVICE) goto error;
	557
	558	/* create dvb_frontend */
dea74869	559	memcpy(&state->frontend.ops, &nxt6000_ops, sizeof(struct dvb_frontend_ops));
1da177e4 LT	560	state->frontend.demodulator_priv = state;
	561	return &state->frontend;
	562
	563	error:
	564	kfree(state);
	565	return NULL;
	566	}
	567
	568	static struct dvb_frontend_ops nxt6000_ops = {
	569
	570	.info = {
	571	.name = "NxtWave NXT6000 DVB-T",
	572	.type = FE_OFDM,
	573	.frequency_min = 0,
	574	.frequency_max = 863250000,
	575	.frequency_stepsize = 62500,
	576	/.frequency_tolerance = //* FIXME: 12% of SR */
	577	.symbol_rate_min = 0, /* FIXME */
	578	.symbol_rate_max = 9360000, /* FIXME */
	579	.symbol_rate_tolerance = 4000,
	580	.caps = FE_CAN_FEC_1_2 \| FE_CAN_FEC_2_3 \| FE_CAN_FEC_3_4 \|
50c25fff MK	581	FE_CAN_FEC_4_5 \| FE_CAN_FEC_5_6 \| FE_CAN_FEC_6_7 \|
	582	FE_CAN_FEC_7_8 \| FE_CAN_FEC_8_9 \| FE_CAN_FEC_AUTO \|
	583	FE_CAN_QAM_16 \| FE_CAN_QAM_64 \| FE_CAN_QAM_AUTO \|
	584	FE_CAN_TRANSMISSION_MODE_AUTO \| FE_CAN_GUARD_INTERVAL_AUTO \|
	585	FE_CAN_HIERARCHY_AUTO,
1da177e4 LT	586	},
	587
	588	.release = nxt6000_release,
	589
	590	.init = nxt6000_init,
605ee41c	591	.i2c_gate_ctrl = nxt6000_i2c_gate_ctrl,
1da177e4	592
115eea4e SO	593	.get_tune_settings = nxt6000_fe_get_tune_settings,
115eea4e SO	594
1da177e4 LT	595	.set_frontend = nxt6000_set_frontend,
	596
	597	.read_status = nxt6000_read_status,
3a4a5711 JS	598	.read_ber = nxt6000_read_ber,
	599	.read_signal_strength = nxt6000_read_signal_strength,
	600	.read_snr = nxt6000_read_snr,
1da177e4 LT	601	};
	602
	603	module_param(debug, int, 0644);
	604	MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
	605
	606	MODULE_DESCRIPTION("NxtWave NXT6000 DVB-T demodulator driver");
	607	MODULE_AUTHOR("Florian Schirmer");
	608	MODULE_LICENSE("GPL");
	609
	610	EXPORT_SYMBOL(nxt6000_attach);