drivers/media/dvb-frontends/ascot2e.c - arm/linux - Git at Google

 /*
  * ascot2e.c
  *
  * Sony Ascot3E DVB-T/T2/C/C2 tuner driver
  *
  * Copyright 2012 Sony Corporation
  * Copyright (C) 2014 NetUP Inc.
  * Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
  * Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
  *
  * 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.
   */

 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/dvb/frontend.h>
 #include <linux/types.h>
 #include "ascot2e.h"
 #include "dvb_frontend.h"

 #define MAX_WRITE_REGSIZE 10

 enum ascot2e_state {
 	STATE_UNKNOWN,
 	STATE_SLEEP,
 	STATE_ACTIVE
 };

 struct ascot2e_priv {
 	u32			frequency;
 	u8			i2c_address;
 	struct i2c_adapter	*i2c;
 	enum ascot2e_state	state;
 	void			*set_tuner_data;
 	int			(*set_tuner)(void *, int);
 };

 enum ascot2e_tv_system_t {
 	ASCOT2E_DTV_DVBT_5,
 	ASCOT2E_DTV_DVBT_6,
 	ASCOT2E_DTV_DVBT_7,
 	ASCOT2E_DTV_DVBT_8,
 	ASCOT2E_DTV_DVBT2_1_7,
 	ASCOT2E_DTV_DVBT2_5,
 	ASCOT2E_DTV_DVBT2_6,
 	ASCOT2E_DTV_DVBT2_7,
 	ASCOT2E_DTV_DVBT2_8,
 	ASCOT2E_DTV_DVBC_6,
 	ASCOT2E_DTV_DVBC_8,
 	ASCOT2E_DTV_DVBC2_6,
 	ASCOT2E_DTV_DVBC2_8,
 	ASCOT2E_DTV_UNKNOWN
 };

 struct ascot2e_band_sett {
 	u8	if_out_sel;
 	u8	agc_sel;
 	u8	mix_oll;
 	u8	rf_gain;
 	u8	if_bpf_gc;
 	u8	fif_offset;
 	u8	bw_offset;
 	u8	bw;
 	u8	rf_oldet;
 	u8	if_bpf_f0;
 };

 #define ASCOT2E_AUTO		0xff
 #define ASCOT2E_OFFSET(ofs)	((u8)(ofs) & 0x1F)
 #define ASCOT2E_BW_6		0x00
 #define ASCOT2E_BW_7		0x01
 #define ASCOT2E_BW_8		0x02
 #define ASCOT2E_BW_1_7		0x03

 static struct ascot2e_band_sett ascot2e_sett[] = {
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
 	  ASCOT2E_OFFSET(-8), ASCOT2E_OFFSET(-6), ASCOT2E_BW_6,  0x0B, 0x00 },
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
 	  ASCOT2E_OFFSET(-8), ASCOT2E_OFFSET(-6), ASCOT2E_BW_6,  0x0B, 0x00 },
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
 	  ASCOT2E_OFFSET(-6), ASCOT2E_OFFSET(-4), ASCOT2E_BW_7,  0x0B, 0x00 },
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
 	  ASCOT2E_OFFSET(-4), ASCOT2E_OFFSET(-2), ASCOT2E_BW_8,  0x0B, 0x00 },
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
 	ASCOT2E_OFFSET(-10), ASCOT2E_OFFSET(-16), ASCOT2E_BW_1_7, 0x0B, 0x00 },
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
 	  ASCOT2E_OFFSET(-8), ASCOT2E_OFFSET(-6), ASCOT2E_BW_6,  0x0B, 0x00 },
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
 	  ASCOT2E_OFFSET(-8), ASCOT2E_OFFSET(-6), ASCOT2E_BW_6,  0x0B, 0x00 },
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
 	  ASCOT2E_OFFSET(-6), ASCOT2E_OFFSET(-4), ASCOT2E_BW_7,  0x0B, 0x00 },
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
 	  ASCOT2E_OFFSET(-4), ASCOT2E_OFFSET(-2), ASCOT2E_BW_8,  0x0B, 0x00 },
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x02, ASCOT2E_AUTO, 0x03,
 	  ASCOT2E_OFFSET(-6), ASCOT2E_OFFSET(-8), ASCOT2E_BW_6,  0x09, 0x00 },
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x02, ASCOT2E_AUTO, 0x03,
 	  ASCOT2E_OFFSET(-2), ASCOT2E_OFFSET(-1), ASCOT2E_BW_8,  0x09, 0x00 },
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x01,
 	  ASCOT2E_OFFSET(-6), ASCOT2E_OFFSET(-4), ASCOT2E_BW_6,  0x09, 0x00 },
 	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x01,
 	  ASCOT2E_OFFSET(-2), ASCOT2E_OFFSET(2),  ASCOT2E_BW_8,  0x09, 0x00 }
 };

 static void ascot2e_i2c_debug(struct ascot2e_priv *priv,
 			      u8 reg, u8 write, const u8 *data, u32 len)
 {
 	dev_dbg(&priv->i2c->dev, "ascot2e: I2C %s reg 0x%02x size %d\n",
 		(write == 0 ? "read" : "write"), reg, len);
 	print_hex_dump_bytes("ascot2e: I2C data: ",
 		DUMP_PREFIX_OFFSET, data, len);
 }

 static int ascot2e_write_regs(struct ascot2e_priv *priv,
 			      u8 reg, const u8 *data, u32 len)
 {
 	int ret;
 	u8 buf[MAX_WRITE_REGSIZE + 1];
 	struct i2c_msg msg[1] = {
 		{
 			.addr = priv->i2c_address,
 			.flags = 0,
 			.len = len + 1,
 			.buf = buf,
 		}
 	};

 	if (len + 1 > sizeof(buf)) {
 		dev_warn(&priv->i2c->dev,"wr reg=%04x: len=%d is too big!\n",
 			 reg, len + 1);
 		return -E2BIG;
 	}

 	ascot2e_i2c_debug(priv, reg, 1, data, len);
 	buf[0] = reg;
 	memcpy(&buf[1], data, len);
 	ret = i2c_transfer(priv->i2c, msg, 1);
 	if (ret >= 0 && ret != 1)
 		ret = -EREMOTEIO;
 	if (ret < 0) {
 		dev_warn(&priv->i2c->dev,
 			"%s: i2c wr failed=%d reg=%02x len=%d\n",
 			KBUILD_MODNAME, ret, reg, len);
 		return ret;
 	}
 	return 0;
 }

 static int ascot2e_write_reg(struct ascot2e_priv *priv, u8 reg, u8 val)
 {
 	return ascot2e_write_regs(priv, reg, &val, 1);
 }

 static int ascot2e_read_regs(struct ascot2e_priv *priv,
 			     u8 reg, u8 *val, u32 len)
 {
 	int ret;
 	struct i2c_msg msg[2] = {
 		{
 			.addr = priv->i2c_address,
 			.flags = 0,
 			.len = 1,
 			.buf = &reg,
 		}, {
 			.addr = priv->i2c_address,
 			.flags = I2C_M_RD,
 			.len = len,
 			.buf = val,
 		}
 	};

 	ret = i2c_transfer(priv->i2c, &msg[0], 1);
 	if (ret >= 0 && ret != 1)
 		ret = -EREMOTEIO;
 	if (ret < 0) {
 		dev_warn(&priv->i2c->dev,
 			"%s: I2C rw failed=%d addr=%02x reg=%02x\n",
 			KBUILD_MODNAME, ret, priv->i2c_address, reg);
 		return ret;
 	}
 	ret = i2c_transfer(priv->i2c, &msg[1], 1);
 	if (ret >= 0 && ret != 1)
 		ret = -EREMOTEIO;
 	if (ret < 0) {
 		dev_warn(&priv->i2c->dev,
 			"%s: i2c rd failed=%d addr=%02x reg=%02x\n",
 			KBUILD_MODNAME, ret, priv->i2c_address, reg);
 		return ret;
 	}
 	ascot2e_i2c_debug(priv, reg, 0, val, len);
 	return 0;
 }

 static int ascot2e_read_reg(struct ascot2e_priv *priv, u8 reg, u8 *val)
 {
 	return ascot2e_read_regs(priv, reg, val, 1);
 }

 static int ascot2e_set_reg_bits(struct ascot2e_priv *priv,
 				u8 reg, u8 data, u8 mask)
 {
 	int res;
 	u8 rdata;

 	if (mask != 0xff) {
 		res = ascot2e_read_reg(priv, reg, &rdata);
 		if (res != 0)
 			return res;
 		data = ((data & mask) | (rdata & (mask ^ 0xFF)));
 	}
 	return ascot2e_write_reg(priv, reg, data);
 }

 static int ascot2e_enter_power_save(struct ascot2e_priv *priv)
 {
 	u8 data[2];

 	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 	if (priv->state == STATE_SLEEP)
 		return 0;
 	data[0] = 0x00;
 	data[1] = 0x04;
 	ascot2e_write_regs(priv, 0x14, data, 2);
 	ascot2e_write_reg(priv, 0x50, 0x01);
 	priv->state = STATE_SLEEP;
 	return 0;
 }

 static int ascot2e_leave_power_save(struct ascot2e_priv *priv)
 {
 	u8 data[2] = { 0xFB, 0x0F };

 	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 	if (priv->state == STATE_ACTIVE)
 		return 0;
 	ascot2e_write_regs(priv, 0x14, data, 2);
 	ascot2e_write_reg(priv, 0x50, 0x00);
 	priv->state = STATE_ACTIVE;
 	return 0;
 }

 static int ascot2e_init(struct dvb_frontend *fe)
 {
 	struct ascot2e_priv *priv = fe->tuner_priv;

 	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 	return ascot2e_leave_power_save(priv);
 }

 static void ascot2e_release(struct dvb_frontend *fe)
 {
 	struct ascot2e_priv *priv = fe->tuner_priv;

 	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;
 }

 static int ascot2e_sleep(struct dvb_frontend *fe)
 {
 	struct ascot2e_priv *priv = fe->tuner_priv;

 	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
 	ascot2e_enter_power_save(priv);
 	return 0;
 }

 static enum ascot2e_tv_system_t ascot2e_get_tv_system(struct dvb_frontend *fe)
 {
 	enum ascot2e_tv_system_t system = ASCOT2E_DTV_UNKNOWN;
 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 	struct ascot2e_priv *priv = fe->tuner_priv;

 	if (p->delivery_system == SYS_DVBT) {
 		if (p->bandwidth_hz <= 5000000)
 			system = ASCOT2E_DTV_DVBT_5;
 		else if (p->bandwidth_hz <= 6000000)
 			system = ASCOT2E_DTV_DVBT_6;
 		else if (p->bandwidth_hz <= 7000000)
 			system = ASCOT2E_DTV_DVBT_7;
 		else if (p->bandwidth_hz <= 8000000)
 			system = ASCOT2E_DTV_DVBT_8;
 		else {
 			system = ASCOT2E_DTV_DVBT_8;
 			p->bandwidth_hz = 8000000;
 		}
 	} else if (p->delivery_system == SYS_DVBT2) {
 		if (p->bandwidth_hz <= 5000000)
 			system = ASCOT2E_DTV_DVBT2_5;
 		else if (p->bandwidth_hz <= 6000000)
 			system = ASCOT2E_DTV_DVBT2_6;
 		else if (p->bandwidth_hz <= 7000000)
 			system = ASCOT2E_DTV_DVBT2_7;
 		else if (p->bandwidth_hz <= 8000000)
 			system = ASCOT2E_DTV_DVBT2_8;
 		else {
 			system = ASCOT2E_DTV_DVBT2_8;
 			p->bandwidth_hz = 8000000;
 		}
 	} else if (p->delivery_system == SYS_DVBC_ANNEX_A) {
 		if (p->bandwidth_hz <= 6000000)
 			system = ASCOT2E_DTV_DVBC_6;
 		else if (p->bandwidth_hz <= 8000000)
 			system = ASCOT2E_DTV_DVBC_8;
 	}
 	dev_dbg(&priv->i2c->dev,
 		"%s(): ASCOT2E DTV system %d (delsys %d, bandwidth %d)\n",
 		__func__, (int)system, p->delivery_system, p->bandwidth_hz);
 	return system;
 }

 static int ascot2e_set_params(struct dvb_frontend *fe)
 {
 	u8 data[10];
 	u32 frequency;
 	enum ascot2e_tv_system_t tv_system;
 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 	struct ascot2e_priv *priv = fe->tuner_priv;

 	dev_dbg(&priv->i2c->dev, "%s(): tune frequency %dkHz\n",
 		__func__, p->frequency / 1000);
 	tv_system = ascot2e_get_tv_system(fe);

 	if (tv_system == ASCOT2E_DTV_UNKNOWN) {
 		dev_dbg(&priv->i2c->dev, "%s(): unknown DTV system\n",
 			__func__);
 		return -EINVAL;
 	}
 	if (priv->set_tuner)
 		priv->set_tuner(priv->set_tuner_data, 1);
 	frequency = roundup(p->frequency / 1000, 25);
 	if (priv->state == STATE_SLEEP)
 		ascot2e_leave_power_save(priv);

 	/* IF_OUT_SEL / AGC_SEL setting */
 	data[0] = 0x00;
 	if (ascot2e_sett[tv_system].agc_sel != ASCOT2E_AUTO) {
 		/* AGC pin setting from parameter table */
 		data[0] |= (u8)(
 			(ascot2e_sett[tv_system].agc_sel & 0x03) << 3);
 	}
 	if (ascot2e_sett[tv_system].if_out_sel != ASCOT2E_AUTO) {
 		/* IFOUT pin setting from parameter table */
 		data[0] |= (u8)(
 			(ascot2e_sett[tv_system].if_out_sel & 0x01) << 2);
 	}
 	/* Set bit[4:2] only */
 	ascot2e_set_reg_bits(priv, 0x05, data[0], 0x1c);
 	/* 0x06 - 0x0F */
 	/* REF_R setting (0x06) */
 	if (tv_system == ASCOT2E_DTV_DVBC_6 ||
 			tv_system == ASCOT2E_DTV_DVBC_8) {
 		/* xtal, xtal*2 */
 		data[0] = (frequency > 500000) ? 16 : 32;
 	} else {
 		/* xtal/8, xtal/4 */
 		data[0] = (frequency > 500000) ? 2 : 4;
 	}
 	/* XOSC_SEL=100uA */
 	data[1] = 0x04;
 	/* KBW setting (0x08), KC0 setting (0x09), KC1 setting (0x0A) */
 	if (tv_system == ASCOT2E_DTV_DVBC_6 ||
 			tv_system == ASCOT2E_DTV_DVBC_8) {
 		data[2] = 18;
 		data[3] = 120;
 		data[4] = 20;
 	} else {
 		data[2] = 48;
 		data[3] = 10;
 		data[4] = 30;
 	}
 	/* ORDER/R2_RANGE/R2_BANK/C2_BANK setting (0x0B) */
 	if (tv_system == ASCOT2E_DTV_DVBC_6 ||
 			tv_system == ASCOT2E_DTV_DVBC_8)
 		data[5] = (frequency > 500000) ? 0x08 : 0x0c;
 	else
 		data[5] = (frequency > 500000) ? 0x30 : 0x38;
 	/* Set MIX_OLL (0x0C) value from parameter table */
 	data[6] = ascot2e_sett[tv_system].mix_oll;
 	/* Set RF_GAIN (0x0D) setting from parameter table */
 	if (ascot2e_sett[tv_system].rf_gain == ASCOT2E_AUTO) {
 		/* RF_GAIN auto control enable */
 		ascot2e_write_reg(priv, 0x4E, 0x01);
 		/* RF_GAIN Default value */
 		data[7] = 0x00;
 	} else {
 		/* RF_GAIN auto control disable */
 		ascot2e_write_reg(priv, 0x4E, 0x00);
 		data[7] = ascot2e_sett[tv_system].rf_gain;
 	}
 	/* Set IF_BPF_GC/FIF_OFFSET (0x0E) value from parameter table */
 	data[8] = (u8)((ascot2e_sett[tv_system].fif_offset << 3) |
 		(ascot2e_sett[tv_system].if_bpf_gc & 0x07));
 	/* Set BW_OFFSET (0x0F) value from parameter table */
 	data[9] = ascot2e_sett[tv_system].bw_offset;
 	ascot2e_write_regs(priv, 0x06, data, 10);
 	/*
 	 * 0x45 - 0x47
 	 * LNA optimization setting
 	 * RF_LNA_DIST1-5, RF_LNA_CM
 	 */
 	if (tv_system == ASCOT2E_DTV_DVBC_6 ||
 			tv_system == ASCOT2E_DTV_DVBC_8) {
 		data[0] = 0x0F;
 		data[1] = 0x00;
 		data[2] = 0x01;
 	} else {
 		data[0] = 0x0F;
 		data[1] = 0x00;
 		data[2] = 0x03;
 	}
 	ascot2e_write_regs(priv, 0x45, data, 3);
 	/* 0x49 - 0x4A
 	 Set RF_OLDET_ENX/RF_OLDET_OLL value from parameter table */
 	data[0] = ascot2e_sett[tv_system].rf_oldet;
 	/* Set IF_BPF_F0 value from parameter table */
 	data[1] = ascot2e_sett[tv_system].if_bpf_f0;
 	ascot2e_write_regs(priv, 0x49, data, 2);
 	/*
 	 * Tune now
 	 * RFAGC fast mode / RFAGC auto control enable
 	 * (set bit[7], bit[5:4] only)
 	 * vco_cal = 1, set MIX_OL_CPU_EN
 	 */
 	ascot2e_set_reg_bits(priv, 0x0c, 0x90, 0xb0);
 	/* Logic wake up, CPU wake up */
 	data[0] = 0xc4;
 	data[1] = 0x40;
 	ascot2e_write_regs(priv, 0x03, data, 2);
 	/* 0x10 - 0x14 */
 	data[0] = (u8)(frequency & 0xFF);         /* 0x10: FRF_L */
 	data[1] = (u8)((frequency >> 8) & 0xFF);  /* 0x11: FRF_M */
 	data[2] = (u8)((frequency >> 16) & 0x0F); /* 0x12: FRF_H (bit[3:0]) */
 	/* 0x12: BW (bit[5:4]) */
 	data[2] |= (u8)(ascot2e_sett[tv_system].bw << 4);
 	data[3] = 0xFF; /* 0x13: VCO calibration enable */
 	data[4] = 0xFF; /* 0x14: Analog block enable */
 	/* Tune (Burst write) */
 	ascot2e_write_regs(priv, 0x10, data, 5);
 	msleep(50);
 	/* CPU deep sleep */
 	ascot2e_write_reg(priv, 0x04, 0x00);
 	/* Logic sleep */
 	ascot2e_write_reg(priv, 0x03, 0xC0);
 	/* RFAGC normal mode (set bit[5:4] only) */
 	ascot2e_set_reg_bits(priv, 0x0C, 0x00, 0x30);
 	priv->frequency = frequency;
 	return 0;
 }

 static int ascot2e_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 {
 	struct ascot2e_priv *priv = fe->tuner_priv;

 	*frequency = priv->frequency * 1000;
 	return 0;
 }

 static const struct dvb_tuner_ops ascot2e_tuner_ops = {
 	.info = {
 		.name = "Sony ASCOT2E",
 		.frequency_min = 1000000,
 		.frequency_max = 1200000000,
 		.frequency_step = 25000,
 	},
 	.init = ascot2e_init,
 	.release = ascot2e_release,
 	.sleep = ascot2e_sleep,
 	.set_params = ascot2e_set_params,
 	.get_frequency = ascot2e_get_frequency,
 };

 struct dvb_frontend *ascot2e_attach(struct dvb_frontend *fe,
 				    const struct ascot2e_config *config,
 				    struct i2c_adapter *i2c)
 {
 	u8 data[4];
 	struct ascot2e_priv *priv = NULL;

 	priv = kzalloc(sizeof(struct ascot2e_priv), GFP_KERNEL);
 	if (priv == NULL)
 		return NULL;
 	priv->i2c_address = (config->i2c_address >> 1);
 	priv->i2c = i2c;
 	priv->set_tuner_data = config->set_tuner_priv;
 	priv->set_tuner = config->set_tuner_callback;

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);

 	/* 16 MHz xTal frequency */
 	data[0] = 16;
 	/* VCO current setting */
 	data[1] = 0x06;
 	/* Logic wake up, CPU boot */
 	data[2] = 0xC4;
 	data[3] = 0x40;
 	ascot2e_write_regs(priv, 0x01, data, 4);
 	/* RFVGA optimization setting (RF_DIST0 - RF_DIST2) */
 	data[0] = 0x10;
 	data[1] = 0x3F;
 	data[2] = 0x25;
 	ascot2e_write_regs(priv, 0x22, data, 3);
 	/* PLL mode setting */
 	ascot2e_write_reg(priv, 0x28, 0x1e);
 	/* RSSI setting */
 	ascot2e_write_reg(priv, 0x59, 0x04);
 	/* TODO check CPU HW error state here */
 	msleep(80);
 	/* Xtal oscillator current control setting */
 	ascot2e_write_reg(priv, 0x4c, 0x01);
 	/* XOSC_SEL=100uA */
 	ascot2e_write_reg(priv, 0x07, 0x04);
 	/* CPU deep sleep */
 	ascot2e_write_reg(priv, 0x04, 0x00);
 	/* Logic sleep */
 	ascot2e_write_reg(priv, 0x03, 0xc0);
 	/* Power save setting */
 	data[0] = 0x00;
 	data[1] = 0x04;
 	ascot2e_write_regs(priv, 0x14, data, 2);
 	ascot2e_write_reg(priv, 0x50, 0x01);
 	priv->state = STATE_SLEEP;

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 0);

 	memcpy(&fe->ops.tuner_ops, &ascot2e_tuner_ops,
 				sizeof(struct dvb_tuner_ops));
 	fe->tuner_priv = priv;
 	dev_info(&priv->i2c->dev,
 		"Sony ASCOT2E attached on addr=%x at I2C adapter %p\n",
 		priv->i2c_address, priv->i2c);
 	return fe;
 }
 EXPORT_SYMBOL(ascot2e_attach);

 MODULE_DESCRIPTION("Sony ASCOT2E terr/cab tuner driver");
 MODULE_AUTHOR("info@netup.ru");
 MODULE_LICENSE("GPL");
	/*
	* ascot2e.c
	*
	* Sony Ascot3E DVB-T/T2/C/C2 tuner driver
	*
	* Copyright 2012 Sony Corporation
	* Copyright (C) 2014 NetUP Inc.
	* Copyright (C) 2014 Sergey Kozlov <serjk@netup.ru>
	* Copyright (C) 2014 Abylay Ospan <aospan@netup.ru>
	*
	* 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.
	*/

	#include <linux/slab.h>
	#include <linux/module.h>
	#include <linux/dvb/frontend.h>
	#include <linux/types.h>
	#include "ascot2e.h"
	#include "dvb_frontend.h"

	#define MAX_WRITE_REGSIZE 10

	enum ascot2e_state {
	STATE_UNKNOWN,
	STATE_SLEEP,
	STATE_ACTIVE
	};

	struct ascot2e_priv {
	u32 frequency;
	u8 i2c_address;
	struct i2c_adapter *i2c;
	enum ascot2e_state state;
	void *set_tuner_data;
	int (set_tuner)(void , int);
	};

	enum ascot2e_tv_system_t {
	ASCOT2E_DTV_DVBT_5,
	ASCOT2E_DTV_DVBT_6,
	ASCOT2E_DTV_DVBT_7,
	ASCOT2E_DTV_DVBT_8,
	ASCOT2E_DTV_DVBT2_1_7,
	ASCOT2E_DTV_DVBT2_5,
	ASCOT2E_DTV_DVBT2_6,
	ASCOT2E_DTV_DVBT2_7,
	ASCOT2E_DTV_DVBT2_8,
	ASCOT2E_DTV_DVBC_6,
	ASCOT2E_DTV_DVBC_8,
	ASCOT2E_DTV_DVBC2_6,
	ASCOT2E_DTV_DVBC2_8,
	ASCOT2E_DTV_UNKNOWN
	};

	struct ascot2e_band_sett {
	u8 if_out_sel;
	u8 agc_sel;
	u8 mix_oll;
	u8 rf_gain;
	u8 if_bpf_gc;
	u8 fif_offset;
	u8 bw_offset;
	u8 bw;
	u8 rf_oldet;
	u8 if_bpf_f0;
	};

	#define ASCOT2E_AUTO 0xff
	#define ASCOT2E_OFFSET(ofs) ((u8)(ofs) & 0x1F)
	#define ASCOT2E_BW_6 0x00
	#define ASCOT2E_BW_7 0x01
	#define ASCOT2E_BW_8 0x02
	#define ASCOT2E_BW_1_7 0x03

	static struct ascot2e_band_sett ascot2e_sett[] = {
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
	ASCOT2E_OFFSET(-8), ASCOT2E_OFFSET(-6), ASCOT2E_BW_6, 0x0B, 0x00 },
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
	ASCOT2E_OFFSET(-8), ASCOT2E_OFFSET(-6), ASCOT2E_BW_6, 0x0B, 0x00 },
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
	ASCOT2E_OFFSET(-6), ASCOT2E_OFFSET(-4), ASCOT2E_BW_7, 0x0B, 0x00 },
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
	ASCOT2E_OFFSET(-4), ASCOT2E_OFFSET(-2), ASCOT2E_BW_8, 0x0B, 0x00 },
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
	ASCOT2E_OFFSET(-10), ASCOT2E_OFFSET(-16), ASCOT2E_BW_1_7, 0x0B, 0x00 },
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
	ASCOT2E_OFFSET(-8), ASCOT2E_OFFSET(-6), ASCOT2E_BW_6, 0x0B, 0x00 },
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
	ASCOT2E_OFFSET(-8), ASCOT2E_OFFSET(-6), ASCOT2E_BW_6, 0x0B, 0x00 },
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
	ASCOT2E_OFFSET(-6), ASCOT2E_OFFSET(-4), ASCOT2E_BW_7, 0x0B, 0x00 },
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x06,
	ASCOT2E_OFFSET(-4), ASCOT2E_OFFSET(-2), ASCOT2E_BW_8, 0x0B, 0x00 },
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x02, ASCOT2E_AUTO, 0x03,
	ASCOT2E_OFFSET(-6), ASCOT2E_OFFSET(-8), ASCOT2E_BW_6, 0x09, 0x00 },
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x02, ASCOT2E_AUTO, 0x03,
	ASCOT2E_OFFSET(-2), ASCOT2E_OFFSET(-1), ASCOT2E_BW_8, 0x09, 0x00 },
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x01,
	ASCOT2E_OFFSET(-6), ASCOT2E_OFFSET(-4), ASCOT2E_BW_6, 0x09, 0x00 },
	{ ASCOT2E_AUTO, ASCOT2E_AUTO, 0x03, ASCOT2E_AUTO, 0x01,
	ASCOT2E_OFFSET(-2), ASCOT2E_OFFSET(2), ASCOT2E_BW_8, 0x09, 0x00 }
	};

	static void ascot2e_i2c_debug(struct ascot2e_priv *priv,
	u8 reg, u8 write, const u8 *data, u32 len)
	{
	dev_dbg(&priv->i2c->dev, "ascot2e: I2C %s reg 0x%02x size %d\n",
	(write == 0 ? "read" : "write"), reg, len);
	print_hex_dump_bytes("ascot2e: I2C data: ",
	DUMP_PREFIX_OFFSET, data, len);
	}

	static int ascot2e_write_regs(struct ascot2e_priv *priv,
	u8 reg, const u8 *data, u32 len)
	{
	int ret;
	u8 buf[MAX_WRITE_REGSIZE + 1];
	struct i2c_msg msg[1] = {
	{
	.addr = priv->i2c_address,
	.flags = 0,
	.len = len + 1,
	.buf = buf,
	}
	};

	if (len + 1 > sizeof(buf)) {
	dev_warn(&priv->i2c->dev,"wr reg=%04x: len=%d is too big!\n",
	reg, len + 1);
	return -E2BIG;
	}

	ascot2e_i2c_debug(priv, reg, 1, data, len);
	buf[0] = reg;
	memcpy(&buf[1], data, len);
	ret = i2c_transfer(priv->i2c, msg, 1);
	if (ret >= 0 && ret != 1)
	ret = -EREMOTEIO;
	if (ret < 0) {
	dev_warn(&priv->i2c->dev,
	"%s: i2c wr failed=%d reg=%02x len=%d\n",
	KBUILD_MODNAME, ret, reg, len);
	return ret;
	}
	return 0;
	}

	static int ascot2e_write_reg(struct ascot2e_priv *priv, u8 reg, u8 val)
	{
	return ascot2e_write_regs(priv, reg, &val, 1);
	}

	static int ascot2e_read_regs(struct ascot2e_priv *priv,
	u8 reg, u8 *val, u32 len)
	{
	int ret;
	struct i2c_msg msg[2] = {
	{
	.addr = priv->i2c_address,
	.flags = 0,
	.len = 1,
	.buf = &reg,
	}, {
	.addr = priv->i2c_address,
	.flags = I2C_M_RD,
	.len = len,
	.buf = val,
	}
	};

	ret = i2c_transfer(priv->i2c, &msg[0], 1);
	if (ret >= 0 && ret != 1)
	ret = -EREMOTEIO;
	if (ret < 0) {
	dev_warn(&priv->i2c->dev,
	"%s: I2C rw failed=%d addr=%02x reg=%02x\n",
	KBUILD_MODNAME, ret, priv->i2c_address, reg);
	return ret;
	}
	ret = i2c_transfer(priv->i2c, &msg[1], 1);
	if (ret >= 0 && ret != 1)
	ret = -EREMOTEIO;
	if (ret < 0) {
	dev_warn(&priv->i2c->dev,
	"%s: i2c rd failed=%d addr=%02x reg=%02x\n",
	KBUILD_MODNAME, ret, priv->i2c_address, reg);
	return ret;
	}
	ascot2e_i2c_debug(priv, reg, 0, val, len);
	return 0;
	}

	static int ascot2e_read_reg(struct ascot2e_priv priv, u8 reg, u8 val)
	{
	return ascot2e_read_regs(priv, reg, val, 1);
	}

	static int ascot2e_set_reg_bits(struct ascot2e_priv *priv,
	u8 reg, u8 data, u8 mask)
	{
	int res;
	u8 rdata;

	if (mask != 0xff) {
	res = ascot2e_read_reg(priv, reg, &rdata);
	if (res != 0)
	return res;
	data = ((data & mask) \| (rdata & (mask ^ 0xFF)));
	}
	return ascot2e_write_reg(priv, reg, data);
	}

	static int ascot2e_enter_power_save(struct ascot2e_priv *priv)
	{
	u8 data[2];

	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
	if (priv->state == STATE_SLEEP)
	return 0;
	data[0] = 0x00;
	data[1] = 0x04;
	ascot2e_write_regs(priv, 0x14, data, 2);
	ascot2e_write_reg(priv, 0x50, 0x01);
	priv->state = STATE_SLEEP;
	return 0;
	}

	static int ascot2e_leave_power_save(struct ascot2e_priv *priv)
	{
	u8 data[2] = { 0xFB, 0x0F };

	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
	if (priv->state == STATE_ACTIVE)
	return 0;
	ascot2e_write_regs(priv, 0x14, data, 2);
	ascot2e_write_reg(priv, 0x50, 0x00);
	priv->state = STATE_ACTIVE;
	return 0;
	}

	static int ascot2e_init(struct dvb_frontend *fe)
	{
	struct ascot2e_priv *priv = fe->tuner_priv;

	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
	return ascot2e_leave_power_save(priv);
	}

	static void ascot2e_release(struct dvb_frontend *fe)
	{
	struct ascot2e_priv *priv = fe->tuner_priv;

	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
	}

	static int ascot2e_sleep(struct dvb_frontend *fe)
	{
	struct ascot2e_priv *priv = fe->tuner_priv;

	dev_dbg(&priv->i2c->dev, "%s()\n", __func__);
	ascot2e_enter_power_save(priv);
	return 0;
	}

	static enum ascot2e_tv_system_t ascot2e_get_tv_system(struct dvb_frontend *fe)
	{
	enum ascot2e_tv_system_t system = ASCOT2E_DTV_UNKNOWN;
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct ascot2e_priv *priv = fe->tuner_priv;

	if (p->delivery_system == SYS_DVBT) {
	if (p->bandwidth_hz <= 5000000)
	system = ASCOT2E_DTV_DVBT_5;
	else if (p->bandwidth_hz <= 6000000)
	system = ASCOT2E_DTV_DVBT_6;
	else if (p->bandwidth_hz <= 7000000)
	system = ASCOT2E_DTV_DVBT_7;
	else if (p->bandwidth_hz <= 8000000)
	system = ASCOT2E_DTV_DVBT_8;
	else {
	system = ASCOT2E_DTV_DVBT_8;
	p->bandwidth_hz = 8000000;
	}
	} else if (p->delivery_system == SYS_DVBT2) {
	if (p->bandwidth_hz <= 5000000)
	system = ASCOT2E_DTV_DVBT2_5;
	else if (p->bandwidth_hz <= 6000000)
	system = ASCOT2E_DTV_DVBT2_6;
	else if (p->bandwidth_hz <= 7000000)
	system = ASCOT2E_DTV_DVBT2_7;
	else if (p->bandwidth_hz <= 8000000)
	system = ASCOT2E_DTV_DVBT2_8;
	else {
	system = ASCOT2E_DTV_DVBT2_8;
	p->bandwidth_hz = 8000000;
	}
	} else if (p->delivery_system == SYS_DVBC_ANNEX_A) {
	if (p->bandwidth_hz <= 6000000)
	system = ASCOT2E_DTV_DVBC_6;
	else if (p->bandwidth_hz <= 8000000)
	system = ASCOT2E_DTV_DVBC_8;
	}
	dev_dbg(&priv->i2c->dev,
	"%s(): ASCOT2E DTV system %d (delsys %d, bandwidth %d)\n",
	__func__, (int)system, p->delivery_system, p->bandwidth_hz);
	return system;
	}

	static int ascot2e_set_params(struct dvb_frontend *fe)
	{
	u8 data[10];
	u32 frequency;
	enum ascot2e_tv_system_t tv_system;
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct ascot2e_priv *priv = fe->tuner_priv;

	dev_dbg(&priv->i2c->dev, "%s(): tune frequency %dkHz\n",
	__func__, p->frequency / 1000);
	tv_system = ascot2e_get_tv_system(fe);

	if (tv_system == ASCOT2E_DTV_UNKNOWN) {
	dev_dbg(&priv->i2c->dev, "%s(): unknown DTV system\n",
	__func__);
	return -EINVAL;
	}
	if (priv->set_tuner)
	priv->set_tuner(priv->set_tuner_data, 1);
	frequency = roundup(p->frequency / 1000, 25);
	if (priv->state == STATE_SLEEP)
	ascot2e_leave_power_save(priv);

	/* IF_OUT_SEL / AGC_SEL setting */
	data[0] = 0x00;
	if (ascot2e_sett[tv_system].agc_sel != ASCOT2E_AUTO) {
	/* AGC pin setting from parameter table */
	data[0] \|= (u8)(
	(ascot2e_sett[tv_system].agc_sel & 0x03) << 3);
	}
	if (ascot2e_sett[tv_system].if_out_sel != ASCOT2E_AUTO) {
	/* IFOUT pin setting from parameter table */
	data[0] \|= (u8)(
	(ascot2e_sett[tv_system].if_out_sel & 0x01) << 2);
	}
	/* Set bit[4:2] only */
	ascot2e_set_reg_bits(priv, 0x05, data[0], 0x1c);
	/* 0x06 - 0x0F */
	/* REF_R setting (0x06) */
	if (tv_system == ASCOT2E_DTV_DVBC_6 \|\|
	tv_system == ASCOT2E_DTV_DVBC_8) {
	/* xtal, xtal2 /
	data[0] = (frequency > 500000) ? 16 : 32;
	} else {
	/* xtal/8, xtal/4 */
	data[0] = (frequency > 500000) ? 2 : 4;
	}
	/* XOSC_SEL=100uA */
	data[1] = 0x04;
	/* KBW setting (0x08), KC0 setting (0x09), KC1 setting (0x0A) */
	if (tv_system == ASCOT2E_DTV_DVBC_6 \|\|
	tv_system == ASCOT2E_DTV_DVBC_8) {
	data[2] = 18;
	data[3] = 120;
	data[4] = 20;
	} else {
	data[2] = 48;
	data[3] = 10;
	data[4] = 30;
	}
	/* ORDER/R2_RANGE/R2_BANK/C2_BANK setting (0x0B) */
	if (tv_system == ASCOT2E_DTV_DVBC_6 \|\|
	tv_system == ASCOT2E_DTV_DVBC_8)
	data[5] = (frequency > 500000) ? 0x08 : 0x0c;
	else
	data[5] = (frequency > 500000) ? 0x30 : 0x38;
	/* Set MIX_OLL (0x0C) value from parameter table */
	data[6] = ascot2e_sett[tv_system].mix_oll;
	/* Set RF_GAIN (0x0D) setting from parameter table */
	if (ascot2e_sett[tv_system].rf_gain == ASCOT2E_AUTO) {
	/* RF_GAIN auto control enable */
	ascot2e_write_reg(priv, 0x4E, 0x01);
	/* RF_GAIN Default value */
	data[7] = 0x00;
	} else {
	/* RF_GAIN auto control disable */
	ascot2e_write_reg(priv, 0x4E, 0x00);
	data[7] = ascot2e_sett[tv_system].rf_gain;
	}
	/* Set IF_BPF_GC/FIF_OFFSET (0x0E) value from parameter table */
	data[8] = (u8)((ascot2e_sett[tv_system].fif_offset << 3) \|
	(ascot2e_sett[tv_system].if_bpf_gc & 0x07));
	/* Set BW_OFFSET (0x0F) value from parameter table */
	data[9] = ascot2e_sett[tv_system].bw_offset;
	ascot2e_write_regs(priv, 0x06, data, 10);
	/*
	* 0x45 - 0x47
	* LNA optimization setting
	* RF_LNA_DIST1-5, RF_LNA_CM
	*/
	if (tv_system == ASCOT2E_DTV_DVBC_6 \|\|
	tv_system == ASCOT2E_DTV_DVBC_8) {
	data[0] = 0x0F;
	data[1] = 0x00;
	data[2] = 0x01;
	} else {
	data[0] = 0x0F;
	data[1] = 0x00;
	data[2] = 0x03;
	}
	ascot2e_write_regs(priv, 0x45, data, 3);
	/* 0x49 - 0x4A
	Set RF_OLDET_ENX/RF_OLDET_OLL value from parameter table */
	data[0] = ascot2e_sett[tv_system].rf_oldet;
	/* Set IF_BPF_F0 value from parameter table */
	data[1] = ascot2e_sett[tv_system].if_bpf_f0;
	ascot2e_write_regs(priv, 0x49, data, 2);
	/*
	* Tune now
	* RFAGC fast mode / RFAGC auto control enable
	* (set bit[7], bit[5:4] only)
	* vco_cal = 1, set MIX_OL_CPU_EN
	*/
	ascot2e_set_reg_bits(priv, 0x0c, 0x90, 0xb0);
	/* Logic wake up, CPU wake up */
	data[0] = 0xc4;
	data[1] = 0x40;
	ascot2e_write_regs(priv, 0x03, data, 2);
	/* 0x10 - 0x14 */
	data[0] = (u8)(frequency & 0xFF); /* 0x10: FRF_L */
	data[1] = (u8)((frequency >> 8) & 0xFF); /* 0x11: FRF_M */
	data[2] = (u8)((frequency >> 16) & 0x0F); /* 0x12: FRF_H (bit[3:0]) */
	/* 0x12: BW (bit[5:4]) */
	data[2] \|= (u8)(ascot2e_sett[tv_system].bw << 4);
	data[3] = 0xFF; /* 0x13: VCO calibration enable */
	data[4] = 0xFF; /* 0x14: Analog block enable */
	/* Tune (Burst write) */
	ascot2e_write_regs(priv, 0x10, data, 5);
	msleep(50);
	/* CPU deep sleep */
	ascot2e_write_reg(priv, 0x04, 0x00);
	/* Logic sleep */
	ascot2e_write_reg(priv, 0x03, 0xC0);
	/* RFAGC normal mode (set bit[5:4] only) */
	ascot2e_set_reg_bits(priv, 0x0C, 0x00, 0x30);
	priv->frequency = frequency;
	return 0;
	}

	static int ascot2e_get_frequency(struct dvb_frontend fe, u32 frequency)
	{
	struct ascot2e_priv *priv = fe->tuner_priv;

	frequency = priv->frequency 1000;
	return 0;
	}

	static const struct dvb_tuner_ops ascot2e_tuner_ops = {
	.info = {
	.name = "Sony ASCOT2E",
	.frequency_min = 1000000,
	.frequency_max = 1200000000,
	.frequency_step = 25000,
	},
	.init = ascot2e_init,
	.release = ascot2e_release,
	.sleep = ascot2e_sleep,
	.set_params = ascot2e_set_params,
	.get_frequency = ascot2e_get_frequency,
	};

	struct dvb_frontend ascot2e_attach(struct dvb_frontend fe,
	const struct ascot2e_config *config,
	struct i2c_adapter *i2c)
	{
	u8 data[4];
	struct ascot2e_priv *priv = NULL;

	priv = kzalloc(sizeof(struct ascot2e_priv), GFP_KERNEL);
	if (priv == NULL)
	return NULL;
	priv->i2c_address = (config->i2c_address >> 1);
	priv->i2c = i2c;
	priv->set_tuner_data = config->set_tuner_priv;
	priv->set_tuner = config->set_tuner_callback;

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);

	/* 16 MHz xTal frequency */
	data[0] = 16;
	/* VCO current setting */
	data[1] = 0x06;
	/* Logic wake up, CPU boot */
	data[2] = 0xC4;
	data[3] = 0x40;
	ascot2e_write_regs(priv, 0x01, data, 4);
	/* RFVGA optimization setting (RF_DIST0 - RF_DIST2) */
	data[0] = 0x10;
	data[1] = 0x3F;
	data[2] = 0x25;
	ascot2e_write_regs(priv, 0x22, data, 3);
	/* PLL mode setting */
	ascot2e_write_reg(priv, 0x28, 0x1e);
	/* RSSI setting */
	ascot2e_write_reg(priv, 0x59, 0x04);
	/* TODO check CPU HW error state here */
	msleep(80);
	/* Xtal oscillator current control setting */
	ascot2e_write_reg(priv, 0x4c, 0x01);
	/* XOSC_SEL=100uA */
	ascot2e_write_reg(priv, 0x07, 0x04);
	/* CPU deep sleep */
	ascot2e_write_reg(priv, 0x04, 0x00);
	/* Logic sleep */
	ascot2e_write_reg(priv, 0x03, 0xc0);
	/* Power save setting */
	data[0] = 0x00;
	data[1] = 0x04;
	ascot2e_write_regs(priv, 0x14, data, 2);
	ascot2e_write_reg(priv, 0x50, 0x01);
	priv->state = STATE_SLEEP;

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 0);

	memcpy(&fe->ops.tuner_ops, &ascot2e_tuner_ops,
	sizeof(struct dvb_tuner_ops));
	fe->tuner_priv = priv;
	dev_info(&priv->i2c->dev,
	"Sony ASCOT2E attached on addr=%x at I2C adapter %p\n",
	priv->i2c_address, priv->i2c);
	return fe;
	}
	EXPORT_SYMBOL(ascot2e_attach);

	MODULE_DESCRIPTION("Sony ASCOT2E terr/cab tuner driver");
	MODULE_AUTHOR("info@netup.ru");
	MODULE_LICENSE("GPL");