[mirror_ubuntu-jammy-kernel.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);

	if (state->config->pll_init) {
		nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x01);	/* open i2c bus switch */
		state->config->pll_init(fe);
		nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x00);	/* close i2c bus switch */
	}
}

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;

	nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x01);	/* open i2c bus switch */
	state->config->pll_set(fe, param);
	nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x00);	/* close i2c bus switch */

	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 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,

	.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);
	210
	211	if (state->config->pll_init) {
	212	nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x01); /* open i2c bus switch */
	213	state->config->pll_init(fe);
	214	nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x00); /* close i2c bus switch */
	215	}
	216	}
	217
	218	static void nxt6000_dump_status(struct nxt6000_state *state)
	219	{
	220	u8 val;
	221
	222	/*
	223	printk("RS_COR_STAT: 0x%02X\n", nxt6000_readreg(fe, RS_COR_STAT));
	224	printk("VIT_SYNC_STATUS: 0x%02X\n", nxt6000_readreg(fe, VIT_SYNC_STATUS));
	225	printk("OFDM_COR_STAT: 0x%02X\n", nxt6000_readreg(fe, OFDM_COR_STAT));
	226	printk("OFDM_SYR_STAT: 0x%02X\n", nxt6000_readreg(fe, OFDM_SYR_STAT));
	227	printk("OFDM_TPS_RCVD_1: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_1));
	228	printk("OFDM_TPS_RCVD_2: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_2));
	229	printk("OFDM_TPS_RCVD_3: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_3));
	230	printk("OFDM_TPS_RCVD_4: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RCVD_4));
	231	printk("OFDM_TPS_RESERVED_1: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RESERVED_1));
	232	printk("OFDM_TPS_RESERVED_2: 0x%02X\n", nxt6000_readreg(fe, OFDM_TPS_RESERVED_2));
	233	*/
	234	printk("NXT6000 status:");
	235
	236	val = nxt6000_readreg(state, RS_COR_STAT);
	237
	238	printk(" DATA DESCR LOCK: %d,", val & 0x01);
	239	printk(" DATA SYNC LOCK: %d,", (val >> 1) & 0x01);
	240
	241	val = nxt6000_readreg(state, VIT_SYNC_STATUS);
	242
	243	printk(" VITERBI LOCK: %d,", (val >> 7) & 0x01);
	244
	245	switch ((val >> 4) & 0x07) {
	246
	247	case 0x00:
	248	printk(" VITERBI CODERATE: 1/2,");
	249	break;
	250
	251	case 0x01:
	252	printk(" VITERBI CODERATE: 2/3,");
253	break;
254
255	case 0x02:
256	printk(" VITERBI CODERATE: 3/4,");
257	break;
258
259	case 0x03:
260	printk(" VITERBI CODERATE: 5/6,");
261	break;
262
263	case 0x04:
264	printk(" VITERBI CODERATE: 7/8,");
265	break;
266
267	default:
268	printk(" VITERBI CODERATE: Reserved,");
269
270	}
271
272	val = nxt6000_readreg(state, OFDM_COR_STAT);
273
274	printk(" CHCTrack: %d,", (val >> 7) & 0x01);
275	printk(" TPSLock: %d,", (val >> 6) & 0x01);
276	printk(" SYRLock: %d,", (val >> 5) & 0x01);
277	printk(" AGCLock: %d,", (val >> 4) & 0x01);
278
279	switch (val & 0x0F) {
280
281	case 0x00:
282	printk(" CoreState: IDLE,");
283	break;
284
285	case 0x02:
286	printk(" CoreState: WAIT_AGC,");
287	break;
288
289	case 0x03:
290	printk(" CoreState: WAIT_SYR,");
291	break;
292
293	case 0x04:
294	printk(" CoreState: WAIT_PPM,");
295	break;
296
297	case 0x01:
298	printk(" CoreState: WAIT_TRL,");
299	break;
300
301	case 0x05:
302	printk(" CoreState: WAIT_TPS,");
303	break;
304
305	case 0x06:
306	printk(" CoreState: MONITOR_TPS,");
307	break;
308
309	default:
310	printk(" CoreState: Reserved,");
311
312	}
313
314	val = nxt6000_readreg(state, OFDM_SYR_STAT);
315
316	printk(" SYRLock: %d,", (val >> 4) & 0x01);
317	printk(" SYRMode: %s,", (val >> 2) & 0x01 ? "8K" : "2K");
318
319	switch ((val >> 4) & 0x03) {
320
321	case 0x00:
322	printk(" SYRGuard: 1/32,");
323	break;
324
325	case 0x01:
326	printk(" SYRGuard: 1/16,");
327	break;
328
329	case 0x02:
330	printk(" SYRGuard: 1/8,");
331	break;
332
333	case 0x03:
334	printk(" SYRGuard: 1/4,");
335	break;
336	}
337
338	val = nxt6000_readreg(state, OFDM_TPS_RCVD_3);
339
340	switch ((val >> 4) & 0x07) {
341
342	case 0x00:
343	printk(" TPSLP: 1/2,");
344	break;
345
346	case 0x01:
347	printk(" TPSLP: 2/3,");
348	break;
349
350	case 0x02:
351	printk(" TPSLP: 3/4,");
352	break;
353
354	case 0x03:
355	printk(" TPSLP: 5/6,");
356	break;
357
358	case 0x04:
359	printk(" TPSLP: 7/8,");
360	break;
361
362	default:
363	printk(" TPSLP: Reserved,");
364
365	}
366
367	switch (val & 0x07) {
368
369	case 0x00:
370	printk(" TPSHP: 1/2,");
371	break;
372
373	case 0x01:
374	printk(" TPSHP: 2/3,");
375	break;
376
377	case 0x02:
378	printk(" TPSHP: 3/4,");
379	break;
380
381	case 0x03:
382	printk(" TPSHP: 5/6,");
383	break;
384
385	case 0x04:
386	printk(" TPSHP: 7/8,");
387	break;
388
389	default:
390	printk(" TPSHP: Reserved,");
391
392	}
393
394	val = nxt6000_readreg(state, OFDM_TPS_RCVD_4);
395
396	printk(" TPSMode: %s,", val & 0x01 ? "8K" : "2K");
397
398	switch ((val >> 4) & 0x03) {
399
400	case 0x00:
401	printk(" TPSGuard: 1/32,");
402	break;
403
404	case 0x01:
405	printk(" TPSGuard: 1/16,");
406	break;
407
408	case 0x02:
409	printk(" TPSGuard: 1/8,");
410	break;
411
412	case 0x03:
413	printk(" TPSGuard: 1/4,");
414	break;
415
416	}
417
418	/* Strange magic required to gain access to RF_AGC_STATUS */
419	nxt6000_readreg(state, RF_AGC_VAL_1);
420	val = nxt6000_readreg(state, RF_AGC_STATUS);
421	val = nxt6000_readreg(state, RF_AGC_STATUS);
422
423	printk(" RF AGC LOCK: %d,", (val >> 4) & 0x01);
424	printk("\n");
425	}
426
427	static int nxt6000_read_status(struct dvb_frontend* fe, fe_status_t* status)
428	{
429	u8 core_status;
b8742700	430	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	431
	432	*status = 0;
	433
	434	core_status = nxt6000_readreg(state, OFDM_COR_STAT);
	435
	436	if (core_status & AGCLOCKED)
	437	*status \|= FE_HAS_SIGNAL;
	438
	439	if (nxt6000_readreg(state, OFDM_SYR_STAT) & GI14_SYR_LOCK)
	440	*status \|= FE_HAS_CARRIER;
	441
	442	if (nxt6000_readreg(state, VIT_SYNC_STATUS) & VITINSYNC)
	443	*status \|= FE_HAS_VITERBI;
	444
	445	if (nxt6000_readreg(state, RS_COR_STAT) & RSCORESTATUS)
	446	*status \|= FE_HAS_SYNC;
	447
	448	if ((core_status & TPSLOCKED) && (*status == (FE_HAS_SIGNAL \| FE_HAS_CARRIER \| FE_HAS_VITERBI \| FE_HAS_SYNC)))
	449	*status \|= FE_HAS_LOCK;
	450
	451	if (debug)
	452	nxt6000_dump_status(state);
	453
	454	return 0;
	455	}
	456
	457	static int nxt6000_init(struct dvb_frontend* fe)
	458	{
b8742700	459	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	460
	461	nxt6000_reset(state);
	462	nxt6000_setup(fe);
	463
	464	return 0;
	465	}
	466
	467	static int nxt6000_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *param)
	468	{
b8742700	469	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	470	int result;
	471
	472	nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x01); /* open i2c bus switch */
	473	state->config->pll_set(fe, param);
	474	nxt6000_writereg(state, ENABLE_TUNER_IIC, 0x00); /* close i2c bus switch */
	475
	476	if ((result = nxt6000_set_bandwidth(state, param->u.ofdm.bandwidth)) < 0)
	477	return result;
	478	if ((result = nxt6000_set_guard_interval(state, param->u.ofdm.guard_interval)) < 0)
	479	return result;
	480	if ((result = nxt6000_set_transmission_mode(state, param->u.ofdm.transmission_mode)) < 0)
	481	return result;
	482	if ((result = nxt6000_set_inversion(state, param->inversion)) < 0)
	483	return result;
	484
115eea4e	485	msleep(500);
1da177e4 LT	486	return 0;
	487	}
	488
	489	static void nxt6000_release(struct dvb_frontend* fe)
	490	{
b8742700	491	struct nxt6000_state* state = fe->demodulator_priv;
1da177e4 LT	492	kfree(state);
	493	}
	494
3a4a5711 JS	495	static int nxt6000_read_snr(struct dvb_frontend* fe, u16* snr)
3a4a5711 JS	496	{
b8742700	497	struct nxt6000_state* state = fe->demodulator_priv;
3a4a5711 JS	498
	499	*snr = nxt6000_readreg( state, OFDM_CHC_SNR) / 8;
	500
	501	return 0;
	502	}
	503
	504	static int nxt6000_read_ber(struct dvb_frontend* fe, u32* ber)
	505	{
b8742700	506	struct nxt6000_state* state = fe->demodulator_priv;
3a4a5711 JS	507
	508	nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18 );
	509
	510	*ber = (nxt6000_readreg( state, VIT_BER_1 ) << 8 ) \|
	511	nxt6000_readreg( state, VIT_BER_0 );
	512
	513	nxt6000_writereg( state, VIT_COR_INTSTAT, 0x18); // Clear BER Done interrupts
	514
	515	return 0;
	516	}
	517
	518	static int nxt6000_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
	519	{
b8742700	520	struct nxt6000_state* state = fe->demodulator_priv;
3a4a5711 JS	521
	522	*signal_strength = (short) (511 -
	523	(nxt6000_readreg(state, AGC_GAIN_1) +
	524	((nxt6000_readreg(state, AGC_GAIN_2) & 0x03) << 8)));
	525
	526	return 0;
	527	}
	528
115eea4e SO	529	static int nxt6000_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
	530	{
	531	tune->min_delay_ms = 500;
	532	return 0;
	533	}
	534
1da177e4 LT	535	static struct dvb_frontend_ops nxt6000_ops;
	536
	537	struct dvb_frontend* nxt6000_attach(const struct nxt6000_config* config,
	538	struct i2c_adapter* i2c)
	539	{
	540	struct nxt6000_state* state = NULL;
	541
	542	/* allocate memory for the internal state */
b8742700	543	state = kmalloc(sizeof(struct nxt6000_state), GFP_KERNEL);
1da177e4 LT	544	if (state == NULL) goto error;
	545
	546	/* setup the state */
	547	state->config = config;
	548	state->i2c = i2c;
	549	memcpy(&state->ops, &nxt6000_ops, sizeof(struct dvb_frontend_ops));
	550
	551	/* check if the demod is there */
	552	if (nxt6000_readreg(state, OFDM_MSC_REV) != NXT6000ASICDEVICE) goto error;
	553
	554	/* create dvb_frontend */
	555	state->frontend.ops = &state->ops;
	556	state->frontend.demodulator_priv = state;
	557	return &state->frontend;
	558
	559	error:
	560	kfree(state);
	561	return NULL;
	562	}
	563
	564	static struct dvb_frontend_ops nxt6000_ops = {
	565
	566	.info = {
	567	.name = "NxtWave NXT6000 DVB-T",
	568	.type = FE_OFDM,
	569	.frequency_min = 0,
	570	.frequency_max = 863250000,
	571	.frequency_stepsize = 62500,
	572	/.frequency_tolerance = //* FIXME: 12% of SR */
	573	.symbol_rate_min = 0, /* FIXME */
	574	.symbol_rate_max = 9360000, /* FIXME */
	575	.symbol_rate_tolerance = 4000,
	576	.caps = FE_CAN_FEC_1_2 \| FE_CAN_FEC_2_3 \| FE_CAN_FEC_3_4 \|
50c25fff MK	577	FE_CAN_FEC_4_5 \| FE_CAN_FEC_5_6 \| FE_CAN_FEC_6_7 \|
	578	FE_CAN_FEC_7_8 \| FE_CAN_FEC_8_9 \| FE_CAN_FEC_AUTO \|
	579	FE_CAN_QAM_16 \| FE_CAN_QAM_64 \| FE_CAN_QAM_AUTO \|
	580	FE_CAN_TRANSMISSION_MODE_AUTO \| FE_CAN_GUARD_INTERVAL_AUTO \|
	581	FE_CAN_HIERARCHY_AUTO,
1da177e4 LT	582	},
	583
	584	.release = nxt6000_release,
	585
	586	.init = nxt6000_init,
	587
115eea4e SO	588	.get_tune_settings = nxt6000_fe_get_tune_settings,
115eea4e SO	589
1da177e4 LT	590	.set_frontend = nxt6000_set_frontend,
	591
	592	.read_status = nxt6000_read_status,
3a4a5711 JS	593	.read_ber = nxt6000_read_ber,
	594	.read_signal_strength = nxt6000_read_signal_strength,
	595	.read_snr = nxt6000_read_snr,
1da177e4 LT	596	};
	597
	598	module_param(debug, int, 0644);
	599	MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
	600
	601	MODULE_DESCRIPTION("NxtWave NXT6000 DVB-T demodulator driver");
	602	MODULE_AUTHOR("Florian Schirmer");
	603	MODULE_LICENSE("GPL");
	604
	605	EXPORT_SYMBOL(nxt6000_attach);