/* * Driver for Zarlink DVB-T ZL10353 demodulator * * Copyright (C) 2006 Christopher Pascoe <c.pascoe@itee.uq.edu.au> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.= */#include <linux/kernel.h>#include <linux/module.h>#include <linux/moduleparam.h>#include <linux/init.h>#include <linux/delay.h>#include <linux/string.h>#include <linux/slab.h>#include "dvb_frontend.h"#include "zl10353_priv.h"#include "zl10353.h"struct zl10353_state {	struct i2c_adapter *i2c;	struct dvb_frontend frontend;	struct dvb_frontend_ops ops;	struct zl10353_config config;};#if 1static int debug_regs = 0;#endifstatic int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val){	struct zl10353_state *state = fe->demodulator_priv;	u8 buf[2] = { reg, val };	struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0,			       .buf = buf, .len = 2 };	int err = i2c_transfer(state->i2c, &msg, 1);	if (err != 1) {		printk("zl10353: write to reg %x failed (err = %d)!\n", reg, err);		return err;	}	return 0;}int zl10353_write(struct dvb_frontend *fe, u8 *ibuf, int ilen){	int err, i;	for (i = 0; i < ilen - 1; i++)		if ((err = zl10353_single_write(fe, ibuf[0] + i, ibuf[i + 1])))			return err;	return 0;}static int zl10353_read_register(struct zl10353_state *state, u8 reg){	int ret;	u8 b0[1] = { reg };	u8 b1[1] = { 0 };	struct i2c_msg msg[2] = { { .addr = state->config.demod_address,				    .flags = 0,				    .buf = b0, .len = 1 },				  { .addr = state->config.demod_address,				    .flags = I2C_M_RD,				    .buf = b1, .len = 1 } };	ret = i2c_transfer(state->i2c, msg, 2);	if (ret != 2) {		printk("%s: readreg error (reg=%d, ret==%i)\n",		       __FUNCTION__, reg, ret);		return ret;	}	return b1[0];}#if 1static void zl10353_dump_regs(struct dvb_frontend *fe){	struct zl10353_state *state = fe->demodulator_priv;	char buf[52], buf2[4];	int ret;	u8 reg;	/* Dump all registers. */	for (reg = 0; ; reg++) {		if (reg % 16 == 0) {			if (reg)				printk(KERN_DEBUG "%s\n", buf);			sprintf(buf, "%02x: ", reg);		}		ret = zl10353_read_register(state, reg);		if (ret >= 0)			sprintf(buf2, "%02x ", (u8)ret);		else			strcpy(buf2, "-- ");		strcat(buf, buf2);		if (reg == 0xff)			break;	}	printk(KERN_DEBUG "%s\n", buf);}#endifstatic int zl10353_sleep(struct dvb_frontend *fe){	static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 };	zl10353_write(fe, zl10353_softdown, sizeof(zl10353_softdown));	return 0;}static int zl10353_set_parameters(struct dvb_frontend *fe,				  struct dvb_frontend_parameters *param){	struct zl10353_state *state = fe->demodulator_priv;	u8 pllbuf[6] = { 0x67 };	/* These settings set "auto-everything" and start the FSM. */	zl10353_single_write(fe, 0x55, 0x80);	udelay(200);	zl10353_single_write(fe, 0xEA, 0x01);	udelay(200);	zl10353_single_write(fe, 0xEA, 0x00);	zl10353_single_write(fe, 0x56, 0x28);	zl10353_single_write(fe, 0x89, 0x20);	zl10353_single_write(fe, 0x5E, 0x00);	zl10353_single_write(fe, 0x65, 0x5A);	zl10353_single_write(fe, 0x66, 0xE9);	zl10353_single_write(fe, 0x62, 0x0A);	state->config.pll_set(fe, param, pllbuf + 1);	zl10353_write(fe, pllbuf, sizeof(pllbuf));	zl10353_single_write(fe, 0x70, 0x01);	udelay(250);	zl10353_single_write(fe, 0xE4, 0x00);	zl10353_single_write(fe, 0xE5, 0x2A);	zl10353_single_write(fe, 0xE9, 0x02);	zl10353_single_write(fe, 0xE7, 0x40);	zl10353_single_write(fe, 0xE8, 0x10);	return 0;}static int zl10353_read_status(struct dvb_frontend *fe, fe_status_t *status){	struct zl10353_state *state = fe->demodulator_priv;	int s6, s7, s8;	if ((s6 = zl10353_read_register(state, STATUS_6)) < 0)		return -EREMOTEIO;	if ((s7 = zl10353_read_register(state, STATUS_7)) < 0)		return -EREMOTEIO;	if ((s8 = zl10353_read_register(state, STATUS_8)) < 0)		return -EREMOTEIO;	*status = 0;	if (s6 & (1 << 2))		*status |= FE_HAS_CARRIER;	if (s6 & (1 << 1))		*status |= FE_HAS_VITERBI;	if (s6 & (1 << 5))		*status |= FE_HAS_LOCK;	if (s7 & (1 << 4))		*status |= FE_HAS_SYNC;	if (s8 & (1 << 6))		*status |= FE_HAS_SIGNAL;	if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=	    (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))		*status &= ~FE_HAS_LOCK;	return 0;}static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr){	struct zl10353_state *state = fe->demodulator_priv;	u8 _snr;#if 1	if (debug_regs)		zl10353_dump_regs(fe);#endif	_snr = zl10353_read_register(state, SNR);	*snr = (_snr << 8) | _snr;	return 0;}static int zl10353_get_tune_settings(struct dvb_frontend *fe,				     struct dvb_frontend_tune_settings					 *fe_tune_settings){	fe_tune_settings->min_delay_ms = 1000;	fe_tune_settings->step_size = 0;	fe_tune_settings->max_drift = 0;	return 0;}static int zl10353_init(struct dvb_frontend *fe){	struct zl10353_state *state = fe->demodulator_priv;	u8 zl10353_reset_attach[6] = { 0x50, 0x03, 0x64, 0x46, 0x15, 0x0F };	int rc = 0;#if 1	if (debug_regs)		zl10353_dump_regs(fe);#endif	/* Do a "hard" reset if not already done */	if (zl10353_read_register(state, 0x50) != 0x03) {		rc = zl10353_write(fe, zl10353_reset_attach,				   sizeof(zl10353_reset_attach));#if 1		if (debug_regs)			zl10353_dump_regs(fe);#endif	}	return 0;}static void zl10353_release(struct dvb_frontend *fe){	struct zl10353_state *state = fe->demodulator_priv;	kfree(state);}static struct dvb_frontend_ops zl10353_ops;struct dvb_frontend *zl10353_attach(const struct zl10353_config *config,				    struct i2c_adapter *i2c){	struct zl10353_state *state = NULL;	/* allocate memory for the internal state */	state = kzalloc(sizeof(struct zl10353_state), GFP_KERNEL);	if (state == NULL)		goto error;	/* setup the state */	state->i2c = i2c;	memcpy(&state->config, config, sizeof(struct zl10353_config));	memcpy(&state->ops, &zl10353_ops, sizeof(struct dvb_frontend_ops));	/* check if the demod is there */	if (zl10353_read_register(state, CHIP_ID) != ID_ZL10353)		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 zl10353_ops = {	.info = {		.name			= "Zarlink ZL10353 DVB-T",		.type			= FE_OFDM,		.frequency_min		= 174000000,		.frequency_max		= 862000000,		.frequency_stepsize	= 166667,		.frequency_tolerance	= 0,		.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 |			FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |			FE_CAN_FEC_AUTO |			FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |			FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |			FE_CAN_HIERARCHY_AUTO | FE_CAN_RECOVER |			FE_CAN_MUTE_TS	},	.release = zl10353_release,	.init = zl10353_init,	.sleep = zl10353_sleep,	.set_frontend = zl10353_set_parameters,	.get_tune_settings = zl10353_get_tune_settings,	.read_status = zl10353_read_status,	.read_snr = zl10353_read_snr,};#if 1module_param(debug_regs, int, 0644);MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off).");#endifMODULE_DESCRIPTION("Zarlink ZL10353 DVB-T demodulator driver");MODULE_AUTHOR("Chris Pascoe");MODULE_LICENSE("GPL");EXPORT_SYMBOL(zl10353_attach);EXPORT_SYMBOL(zl10353_write);