text: /*
      Conexant cx24117/cx24132 - Dual DVBS/S2 Satellite demod/tuner driver
  
      Copyright (C) 2013 Luis Alves <ljalvs@gmail.com>
  	July, 6th 2013
  	    First release based on cx24116 driver by:
  	    Steven Toth and Georg Acher, Darron Broad, Igor Liplianin
  	    Cards currently supported:
  		TBS6980 - Dual DVBS/S2 PCIe card
  		TBS6981 - Dual DVBS/S2 PCIe card
  
      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/slab.h>
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/init.h>
  #include <linux/firmware.h>
  
  #include "tuner-i2c.h"
  #include <media/dvb_frontend.h>
  #include "cx24117.h"
  
  
  #define CX24117_DEFAULT_FIRMWARE "dvb-fe-cx24117.fw"
  #define CX24117_SEARCH_RANGE_KHZ 5000
  
  /* known registers */
  #define CX24117_REG_COMMAND      (0x00)      /* command buffer */
  #define CX24117_REG_EXECUTE      (0x1f)      /* execute command */
  
  #define CX24117_REG_FREQ3_0      (0x34)      /* frequency */
  #define CX24117_REG_FREQ2_0      (0x35)
  #define CX24117_REG_FREQ1_0      (0x36)
  #define CX24117_REG_STATE0       (0x39)
  #define CX24117_REG_SSTATUS0     (0x3a)      /* demod0 signal high / status */
  #define CX24117_REG_SIGNAL0      (0x3b)
  #define CX24117_REG_FREQ5_0      (0x3c)      /* +-freq */
  #define CX24117_REG_FREQ6_0      (0x3d)
  #define CX24117_REG_SRATE2_0     (0x3e)      /* +- 1000 * srate */
  #define CX24117_REG_SRATE1_0     (0x3f)
  #define CX24117_REG_QUALITY2_0   (0x40)
  #define CX24117_REG_QUALITY1_0   (0x41)
  
  #define CX24117_REG_BER4_0       (0x47)
  #define CX24117_REG_BER3_0       (0x48)
  #define CX24117_REG_BER2_0       (0x49)
  #define CX24117_REG_BER1_0       (0x4a)
  #define CX24117_REG_DVBS_UCB2_0  (0x4b)
  #define CX24117_REG_DVBS_UCB1_0  (0x4c)
  #define CX24117_REG_DVBS2_UCB2_0 (0x50)
  #define CX24117_REG_DVBS2_UCB1_0 (0x51)
  #define CX24117_REG_QSTATUS0     (0x93)
  #define CX24117_REG_CLKDIV0      (0xe6)
  #define CX24117_REG_RATEDIV0     (0xf0)
  
  
  #define CX24117_REG_FREQ3_1      (0x55)      /* frequency */
  #define CX24117_REG_FREQ2_1      (0x56)
  #define CX24117_REG_FREQ1_1      (0x57)
  #define CX24117_REG_STATE1       (0x5a)
  #define CX24117_REG_SSTATUS1     (0x5b)      /* demod1 signal high / status */
  #define CX24117_REG_SIGNAL1      (0x5c)
  #define CX24117_REG_FREQ5_1      (0x5d)      /* +- freq */
  #define CX24117_REG_FREQ4_1      (0x5e)
  #define CX24117_REG_SRATE2_1     (0x5f)
  #define CX24117_REG_SRATE1_1     (0x60)
  #define CX24117_REG_QUALITY2_1   (0x61)
  #define CX24117_REG_QUALITY1_1   (0x62)
  #define CX24117_REG_BER4_1       (0x68)
  #define CX24117_REG_BER3_1       (0x69)
  #define CX24117_REG_BER2_1       (0x6a)
  #define CX24117_REG_BER1_1       (0x6b)
  #define CX24117_REG_DVBS_UCB2_1  (0x6c)
  #define CX24117_REG_DVBS_UCB1_1  (0x6d)
  #define CX24117_REG_DVBS2_UCB2_1 (0x71)
  #define CX24117_REG_DVBS2_UCB1_1 (0x72)
  #define CX24117_REG_QSTATUS1     (0x9f)
  #define CX24117_REG_CLKDIV1      (0xe7)
  #define CX24117_REG_RATEDIV1     (0xf1)
  
  
  /* arg buffer size */
  #define CX24117_ARGLEN       (0x1e)
  
  /* rolloff */
  #define CX24117_ROLLOFF_020  (0x00)
  #define CX24117_ROLLOFF_025  (0x01)
  #define CX24117_ROLLOFF_035  (0x02)
  
  /* pilot bit */
  #define CX24117_PILOT_OFF    (0x00)
  #define CX24117_PILOT_ON     (0x40)
  #define CX24117_PILOT_AUTO   (0x80)
  
  /* signal status */
  #define CX24117_HAS_SIGNAL   (0x01)
  #define CX24117_HAS_CARRIER  (0x02)
  #define CX24117_HAS_VITERBI  (0x04)
  #define CX24117_HAS_SYNCLOCK (0x08)
  #define CX24117_STATUS_MASK  (0x0f)
  #define CX24117_SIGNAL_MASK  (0xc0)
  
  
  /* arg offset for DiSEqC */
  #define CX24117_DISEQC_DEMOD  (1)
  #define CX24117_DISEQC_BURST  (2)
  #define CX24117_DISEQC_ARG3_2 (3)   /* unknown value=2 */
  #define CX24117_DISEQC_ARG4_0 (4)   /* unknown value=0 */
  #define CX24117_DISEQC_ARG5_0 (5)   /* unknown value=0 */
  #define CX24117_DISEQC_MSGLEN (6)
  #define CX24117_DISEQC_MSGOFS (7)
  
  /* DiSEqC burst */
  #define CX24117_DISEQC_MINI_A (0)
  #define CX24117_DISEQC_MINI_B (1)
  
  
  #define CX24117_PNE	(0) /* 0 disabled / 2 enabled */
  #define CX24117_OCC	(1) /* 0 disabled / 1 enabled */
  
  
  enum cmds {
  	CMD_SET_VCOFREQ    = 0x10,
  	CMD_TUNEREQUEST    = 0x11,
  	CMD_GLOBAL_MPEGCFG = 0x13,
  	CMD_MPEGCFG        = 0x14,
  	CMD_TUNERINIT      = 0x15,
  	CMD_GET_SRATE      = 0x18,
  	CMD_SET_GOLDCODE   = 0x19,
  	CMD_GET_AGCACC     = 0x1a,
  	CMD_DEMODINIT      = 0x1b,
  	CMD_GETCTLACC      = 0x1c,
  
  	CMD_LNBCONFIG      = 0x20,
  	CMD_LNBSEND        = 0x21,
  	CMD_LNBDCLEVEL     = 0x22,
  	CMD_LNBPCBCONFIG   = 0x23,
  	CMD_LNBSENDTONEBST = 0x24,
  	CMD_LNBUPDREPLY    = 0x25,
  
  	CMD_SET_GPIOMODE   = 0x30,
  	CMD_SET_GPIOEN     = 0x31,
  	CMD_SET_GPIODIR    = 0x32,
  	CMD_SET_GPIOOUT    = 0x33,
  	CMD_ENABLERSCORR   = 0x34,
  	CMD_FWVERSION      = 0x35,
  	CMD_SET_SLEEPMODE  = 0x36,
  	CMD_BERCTRL        = 0x3c,
  	CMD_EVENTCTRL      = 0x3d,
  };
  
  static LIST_HEAD(hybrid_tuner_instance_list);
  static DEFINE_MUTEX(cx24117_list_mutex);
  
  /* The Demod/Tuner can't easily provide these, we cache them */
  struct cx24117_tuning {
  	u32 frequency;
  	u32 symbol_rate;
  	enum fe_spectral_inversion inversion;
  	enum fe_code_rate fec;
  
  	enum fe_delivery_system delsys;
  	enum fe_modulation modulation;
  	enum fe_pilot pilot;
  	enum fe_rolloff rolloff;
  
  	/* Demod values */
  	u8 fec_val;
  	u8 fec_mask;
  	u8 inversion_val;
  	u8 pilot_val;
  	u8 rolloff_val;
  };
  
  /* Basic commands that are sent to the firmware */
  struct cx24117_cmd {
  	u8 len;
  	u8 args[CX24117_ARGLEN];
  };
  
  /* common to both fe's */
  struct cx24117_priv {
  	u8 demod_address;
  	struct i2c_adapter *i2c;
  	u8 skip_fw_load;
  	struct mutex fe_lock;
  
  	/* Used for sharing this struct between demods */
  	struct tuner_i2c_props i2c_props;
  	struct list_head hybrid_tuner_instance_list;
  };
  
  /* one per each fe */
  struct cx24117_state {
  	struct cx24117_priv *priv;
  	struct dvb_frontend frontend;
  
  	struct cx24117_tuning dcur;
  	struct cx24117_tuning dnxt;
  	struct cx24117_cmd dsec_cmd;
  
  	int demod;
  };
  
  /* modfec (modulation and FEC) lookup table */
  /* Check cx24116.c for a detailed description of each field */
  static struct cx24117_modfec {
  	enum fe_delivery_system delivery_system;
  	enum fe_modulation modulation;
  	enum fe_code_rate fec;
  	u8 mask;	/* In DVBS mode this is used to autodetect */
  	u8 val;		/* Passed to the firmware to indicate mode selection */
  } cx24117_modfec_modes[] = {
  	/* QPSK. For unknown rates we set hardware to auto detect 0xfe 0x30 */
  
  	/*mod   fec       mask  val */
  	{ SYS_DVBS, QPSK, FEC_NONE, 0xfe, 0x30 },
  	{ SYS_DVBS, QPSK, FEC_1_2,  0x02, 0x2e }, /* 00000010 00101110 */
  	{ SYS_DVBS, QPSK, FEC_2_3,  0x04, 0x2f }, /* 00000100 00101111 */
  	{ SYS_DVBS, QPSK, FEC_3_4,  0x08, 0x30 }, /* 00001000 00110000 */
  	{ SYS_DVBS, QPSK, FEC_4_5,  0xfe, 0x30 }, /* 000?0000 ?        */
  	{ SYS_DVBS, QPSK, FEC_5_6,  0x20, 0x31 }, /* 00100000 00110001 */
  	{ SYS_DVBS, QPSK, FEC_6_7,  0xfe, 0x30 }, /* 0?000000 ?        */
  	{ SYS_DVBS, QPSK, FEC_7_8,  0x80, 0x32 }, /* 10000000 00110010 */
  	{ SYS_DVBS, QPSK, FEC_8_9,  0xfe, 0x30 }, /* 0000000? ?        */
  	{ SYS_DVBS, QPSK, FEC_AUTO, 0xfe, 0x30 },
  	/* NBC-QPSK */
  	{ SYS_DVBS2, QPSK, FEC_NONE, 0x00, 0x00 },
  	{ SYS_DVBS2, QPSK, FEC_1_2,  0x00, 0x04 },
  	{ SYS_DVBS2, QPSK, FEC_3_5,  0x00, 0x05 },
  	{ SYS_DVBS2, QPSK, FEC_2_3,  0x00, 0x06 },
  	{ SYS_DVBS2, QPSK, FEC_3_4,  0x00, 0x07 },
  	{ SYS_DVBS2, QPSK, FEC_4_5,  0x00, 0x08 },
  	{ SYS_DVBS2, QPSK, FEC_5_6,  0x00, 0x09 },
  	{ SYS_DVBS2, QPSK, FEC_8_9,  0x00, 0x0a },
  	{ SYS_DVBS2, QPSK, FEC_9_10, 0x00, 0x0b },
  	{ SYS_DVBS2, QPSK, FEC_AUTO, 0x00, 0x00 },
  	/* 8PSK */
  	{ SYS_DVBS2, PSK_8, FEC_NONE, 0x00, 0x00 },
  	{ SYS_DVBS2, PSK_8, FEC_3_5,  0x00, 0x0c },
  	{ SYS_DVBS2, PSK_8, FEC_2_3,  0x00, 0x0d },
  	{ SYS_DVBS2, PSK_8, FEC_3_4,  0x00, 0x0e },
  	{ SYS_DVBS2, PSK_8, FEC_5_6,  0x00, 0x0f },
  	{ SYS_DVBS2, PSK_8, FEC_8_9,  0x00, 0x10 },
  	{ SYS_DVBS2, PSK_8, FEC_9_10, 0x00, 0x11 },
  	{ SYS_DVBS2, PSK_8, FEC_AUTO, 0x00, 0x00 },
  	/*
  	 * 'val' can be found in the FECSTATUS register when tuning.
  	 * FECSTATUS will give the actual FEC in use if tuning was successful.
  	 */
  };
  
  
  static int cx24117_writereg(struct cx24117_state *state, u8 reg, u8 data)
  {
  	u8 buf[] = { reg, data };
  	struct i2c_msg msg = { .addr = state->priv->demod_address,
  		.flags = 0, .buf = buf, .len = 2 };
  	int ret;
  
  	dev_dbg(&state->priv->i2c->dev,
  			"%s() demod%d i2c wr @0x%02x=0x%02x\n",
  			__func__, state->demod, reg, data);
  
  	ret = i2c_transfer(state->priv->i2c, &msg, 1);
  	if (ret < 0) {
  		dev_warn(&state->priv->i2c->dev,
  			"%s: demod%d i2c wr err(%i) @0x%02x=0x%02x\n",
  			KBUILD_MODNAME, state->demod, ret, reg, data);
  		return ret;
  	}
  	return 0;
  }
  
  static int cx24117_writecmd(struct cx24117_state *state,
  	struct cx24117_cmd *cmd)
  {
  	struct i2c_msg msg;
  	u8 buf[CX24117_ARGLEN+1];
  	int ret;
  
  	dev_dbg(&state->priv->i2c->dev,
  			"%s() demod%d i2c wr cmd len=%d\n",
  			__func__, state->demod, cmd->len);
  
  	buf[0] = CX24117_REG_COMMAND;
  	memcpy(&buf[1], cmd->args, cmd->len);
  
  	msg.addr = state->priv->demod_address;
  	msg.flags = 0;
  	msg.len = cmd->len+1;
  	msg.buf = buf;
  	ret = i2c_transfer(state->priv->i2c, &msg, 1);
  	if (ret < 0) {
  		dev_warn(&state->priv->i2c->dev,
  			"%s: demod%d i2c wr cmd err(%i) len=%d\n",
  			KBUILD_MODNAME, state->demod, ret, cmd->len);
  		return ret;
  	}
  	return 0;
  }
  
  static int cx24117_readreg(struct cx24117_state *state, u8 reg)
  {
  	int ret;
  	u8 recv = 0;
  	struct i2c_msg msg[] = {
  		{ .addr = state->priv->demod_address, .flags = 0,
  			.buf = &reg, .len = 1 },
  		{ .addr = state->priv->demod_address, .flags = I2C_M_RD,
  			.buf = &recv, .len = 1 }
  	};
  
  	ret = i2c_transfer(state->priv->i2c, msg, 2);
  	if (ret < 0) {
  		dev_warn(&state->priv->i2c->dev,
  			"%s: demod%d i2c rd err(%d) @0x%x\n",
  			KBUILD_MODNAME, state->demod, ret, reg);
  		return ret;
  	}
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d i2c rd @0x%02x=0x%02x\n",
  		__func__, state->demod, reg, recv);
  
  	return recv;
  }
  
  static int cx24117_readregN(struct cx24117_state *state,
  	u8 reg, u8 *buf, int len)
  {
  	int ret;
  	struct i2c_msg msg[] = {
  		{ .addr = state->priv->demod_address, .flags = 0,
  			.buf = &reg, .len = 1 },
  		{ .addr = state->priv->demod_address, .flags = I2C_M_RD,
  			.buf = buf, .len = len }
  	};
  
  	ret = i2c_transfer(state->priv->i2c, msg, 2);
  	if (ret < 0) {
  		dev_warn(&state->priv->i2c->dev,
  			"%s: demod%d i2c rd err(%d) @0x%x\n",
  			KBUILD_MODNAME, state->demod, ret, reg);
  		return ret;
  	}
  	return 0;
  }
  
  static int cx24117_set_inversion(struct cx24117_state *state,
  	enum fe_spectral_inversion inversion)
  {
  	dev_dbg(&state->priv->i2c->dev, "%s(%d) demod%d\n",
  		__func__, inversion, state->demod);
  
  	switch (inversion) {
  	case INVERSION_OFF:
  		state->dnxt.inversion_val = 0x00;
  		break;
  	case INVERSION_ON:
  		state->dnxt.inversion_val = 0x04;
  		break;
  	case INVERSION_AUTO:
  		state->dnxt.inversion_val = 0x0C;
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	state->dnxt.inversion = inversion;
  
  	return 0;
  }
  
  static int cx24117_lookup_fecmod(struct cx24117_state *state,
  	enum fe_delivery_system d, enum fe_modulation m, enum fe_code_rate f)
  {
  	int i, ret = -EINVAL;
  
  	dev_dbg(&state->priv->i2c->dev,
  		"%s(demod(0x%02x,0x%02x) demod%d\n",
  		__func__, m, f, state->demod);
  
  	for (i = 0; i < ARRAY_SIZE(cx24117_modfec_modes); i++) {
  		if ((d == cx24117_modfec_modes[i].delivery_system) &&
  			(m == cx24117_modfec_modes[i].modulation) &&
  			(f == cx24117_modfec_modes[i].fec)) {
  				ret = i;
  				break;
  			}
  	}
  
  	return ret;
  }
  
  static int cx24117_set_fec(struct cx24117_state *state,
  			   enum fe_delivery_system delsys,
  			   enum fe_modulation mod,
  			   enum fe_code_rate fec)
  {
  	int ret;
  
  	dev_dbg(&state->priv->i2c->dev,
  		"%s(0x%02x,0x%02x) demod%d\n",
  		__func__, mod, fec, state->demod);
  
  	ret = cx24117_lookup_fecmod(state, delsys, mod, fec);
  	if (ret < 0)
  		return ret;
  
  	state->dnxt.fec = fec;
  	state->dnxt.fec_val = cx24117_modfec_modes[ret].val;
  	state->dnxt.fec_mask = cx24117_modfec_modes[ret].mask;
  	dev_dbg(&state->priv->i2c->dev,
  		"%s() demod%d mask/val = 0x%02x/0x%02x\n", __func__,
  		state->demod, state->dnxt.fec_mask, state->dnxt.fec_val);
  
  	return 0;
  }
  
  static int cx24117_set_symbolrate(struct cx24117_state *state, u32 rate)
  {
  	dev_dbg(&state->priv->i2c->dev, "%s(%d) demod%d\n",
  		__func__, rate, state->demod);
  
  	state->dnxt.symbol_rate = rate;
  
  	dev_dbg(&state->priv->i2c->dev,
  		"%s() demod%d symbol_rate = %d\n",
  		__func__, state->demod, rate);
  
  	return 0;
  }
  
  static int cx24117_load_firmware(struct dvb_frontend *fe,
  	const struct firmware *fw);
  
  static int cx24117_firmware_ondemand(struct dvb_frontend *fe)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	const struct firmware *fw;
  	int ret = 0;
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d skip_fw_load=%d\n",
  		__func__, state->demod, state->priv->skip_fw_load);
  
  	if (state->priv->skip_fw_load)
  		return 0;
  
  	/* check if firmware is already running */
  	if (cx24117_readreg(state, 0xeb) != 0xa) {
  		/* Load firmware */
  		/* request the firmware, this will block until loaded */
  		dev_dbg(&state->priv->i2c->dev,
  			"%s: Waiting for firmware upload (%s)...\n",
  			__func__, CX24117_DEFAULT_FIRMWARE);
  		ret = request_firmware(&fw, CX24117_DEFAULT_FIRMWARE,
  			state->priv->i2c->dev.parent);
  		dev_dbg(&state->priv->i2c->dev,
  			"%s: Waiting for firmware upload(2)...\n", __func__);
  		if (ret) {
  			dev_err(&state->priv->i2c->dev,
  				"%s: No firmware uploaded (timeout or file not found?)\n",
  __func__);
  			return ret;
  		}
  
  		/* Make sure we don't recurse back through here
  		 * during loading */
  		state->priv->skip_fw_load = 1;
  
  		ret = cx24117_load_firmware(fe, fw);
  		if (ret)
  			dev_err(&state->priv->i2c->dev,
  				"%s: Writing firmware failed\n", __func__);
  		release_firmware(fw);
  
  		dev_info(&state->priv->i2c->dev,
  			"%s: Firmware upload %s\n", __func__,
  			ret == 0 ? "complete" : "failed");
  
  		/* Ensure firmware is always loaded if required */
  		state->priv->skip_fw_load = 0;
  	}
  
  	return ret;
  }
  
  /* Take a basic firmware command structure, format it
   * and forward it for processing
   */
  static int cx24117_cmd_execute_nolock(struct dvb_frontend *fe,
  	struct cx24117_cmd *cmd)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	int i, ret;
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d\n",
  		__func__, state->demod);
  
  	/* Load the firmware if required */
  	ret = cx24117_firmware_ondemand(fe);
  	if (ret != 0)
  		return ret;
  
  	/* Write the command */
  	cx24117_writecmd(state, cmd);
  
  	/* Start execution and wait for cmd to terminate */
  	cx24117_writereg(state, CX24117_REG_EXECUTE, 0x01);
  	i = 0;
  	while (cx24117_readreg(state, CX24117_REG_EXECUTE)) {
  		msleep(20);
  		if (i++ > 40) {
  			/* Avoid looping forever if the firmware does
  				not respond */
  			dev_warn(&state->priv->i2c->dev,
  				"%s() Firmware not responding\n", __func__);
  			return -EIO;
  		}
  	}
  	return 0;
  }
  
  static int cx24117_cmd_execute(struct dvb_frontend *fe, struct cx24117_cmd *cmd)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	int ret;
  
  	mutex_lock(&state->priv->fe_lock);
  	ret = cx24117_cmd_execute_nolock(fe, cmd);
  	mutex_unlock(&state->priv->fe_lock);
  
  	return ret;
  }
  
  static int cx24117_load_firmware(struct dvb_frontend *fe,
  	const struct firmware *fw)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	struct cx24117_cmd cmd;
  	int i, ret;
  	unsigned char vers[4];
  
  	struct i2c_msg msg;
  	u8 *buf;
  
  	dev_dbg(&state->priv->i2c->dev,
  		"%s() demod%d FW is %zu bytes (%02x %02x .. %02x %02x)\n",
  		__func__, state->demod, fw->size, fw->data[0], fw->data[1],
  		fw->data[fw->size - 2], fw->data[fw->size - 1]);
  
  	cx24117_writereg(state, 0xea, 0x00);
  	cx24117_writereg(state, 0xea, 0x01);
  	cx24117_writereg(state, 0xea, 0x00);
  
  	cx24117_writereg(state, 0xce, 0x92);
  
  	cx24117_writereg(state, 0xfb, 0x00);
  	cx24117_writereg(state, 0xfc, 0x00);
  
  	cx24117_writereg(state, 0xc3, 0x04);
  	cx24117_writereg(state, 0xc4, 0x04);
  
  	cx24117_writereg(state, 0xce, 0x00);
  	cx24117_writereg(state, 0xcf, 0x00);
  
  	cx24117_writereg(state, 0xea, 0x00);
  	cx24117_writereg(state, 0xeb, 0x0c);
  	cx24117_writereg(state, 0xec, 0x06);
  	cx24117_writereg(state, 0xed, 0x05);
  	cx24117_writereg(state, 0xee, 0x03);
  	cx24117_writereg(state, 0xef, 0x05);
  
  	cx24117_writereg(state, 0xf3, 0x03);
  	cx24117_writereg(state, 0xf4, 0x44);
  
  	cx24117_writereg(state, CX24117_REG_RATEDIV0, 0x04);
  	cx24117_writereg(state, CX24117_REG_CLKDIV0, 0x02);
  
  	cx24117_writereg(state, CX24117_REG_RATEDIV1, 0x04);
  	cx24117_writereg(state, CX24117_REG_CLKDIV1, 0x02);
  
  	cx24117_writereg(state, 0xf2, 0x04);
  	cx24117_writereg(state, 0xe8, 0x02);
  	cx24117_writereg(state, 0xea, 0x01);
  	cx24117_writereg(state, 0xc8, 0x00);
  	cx24117_writereg(state, 0xc9, 0x00);
  	cx24117_writereg(state, 0xca, 0x00);
  	cx24117_writereg(state, 0xcb, 0x00);
  	cx24117_writereg(state, 0xcc, 0x00);
  	cx24117_writereg(state, 0xcd, 0x00);
  	cx24117_writereg(state, 0xe4, 0x03);
  	cx24117_writereg(state, 0xeb, 0x0a);
  
  	cx24117_writereg(state, 0xfb, 0x00);
  	cx24117_writereg(state, 0xe0, 0x76);
  	cx24117_writereg(state, 0xf7, 0x81);
  	cx24117_writereg(state, 0xf8, 0x00);
  	cx24117_writereg(state, 0xf9, 0x00);
  
  	buf = kmalloc(fw->size + 1, GFP_KERNEL);
  	if (buf == NULL) {
  		state->priv->skip_fw_load = 0;
  		return -ENOMEM;
  	}
  
  	/* fw upload reg */
  	buf[0] = 0xfa;
  	memcpy(&buf[1], fw->data, fw->size);
  
  	/* prepare i2c message to send */
  	msg.addr = state->priv->demod_address;
  	msg.flags = 0;
  	msg.len = fw->size + 1;
  	msg.buf = buf;
  
  	/* send fw */
  	ret = i2c_transfer(state->priv->i2c, &msg, 1);
  	if (ret < 0)
  		return ret;
  
  	kfree(buf);
  
  	cx24117_writereg(state, 0xf7, 0x0c);
  	cx24117_writereg(state, 0xe0, 0x00);
  
  	/* Init demodulator */
  	cmd.args[0] = CMD_DEMODINIT;
  	cmd.args[1] = 0x00;
  	cmd.args[2] = 0x01;
  	cmd.args[3] = 0x00;
  	cmd.len = 4;
  	ret = cx24117_cmd_execute_nolock(fe, &cmd);
  	if (ret != 0)
  		goto error;
  
  	/* Set VCO frequency */
  	cmd.args[0] = CMD_SET_VCOFREQ;
  	cmd.args[1] = 0x06;
  	cmd.args[2] = 0x2b;
  	cmd.args[3] = 0xd8;
  	cmd.args[4] = 0xa5;
  	cmd.args[5] = 0xee;
  	cmd.args[6] = 0x03;
  	cmd.args[7] = 0x9d;
  	cmd.args[8] = 0xfc;
  	cmd.args[9] = 0x06;
  	cmd.args[10] = 0x02;
  	cmd.args[11] = 0x9d;
  	cmd.args[12] = 0xfc;
  	cmd.len = 13;
  	ret = cx24117_cmd_execute_nolock(fe, &cmd);
  	if (ret != 0)
  		goto error;
  
  	/* Tuner init */
  	cmd.args[0] = CMD_TUNERINIT;
  	cmd.args[1] = 0x00;
  	cmd.args[2] = 0x01;
  	cmd.args[3] = 0x00;
  	cmd.args[4] = 0x00;
  	cmd.args[5] = 0x01;
  	cmd.args[6] = 0x01;
  	cmd.args[7] = 0x01;
  	cmd.args[8] = 0x00;
  	cmd.args[9] = 0x05;
  	cmd.args[10] = 0x02;
  	cmd.args[11] = 0x02;
  	cmd.args[12] = 0x00;
  	cmd.len = 13;
  	ret = cx24117_cmd_execute_nolock(fe, &cmd);
  	if (ret != 0)
  		goto error;
  
  	/* Global MPEG config */
  	cmd.args[0] = CMD_GLOBAL_MPEGCFG;
  	cmd.args[1] = 0x00;
  	cmd.args[2] = 0x00;
  	cmd.args[3] = 0x00;
  	cmd.args[4] = 0x01;
  	cmd.args[5] = 0x00;
  	cmd.len = 6;
  	ret = cx24117_cmd_execute_nolock(fe, &cmd);
  	if (ret != 0)
  		goto error;
  
  	/* MPEG config for each demod */
  	for (i = 0; i < 2; i++) {
  		cmd.args[0] = CMD_MPEGCFG;
  		cmd.args[1] = (u8) i;
  		cmd.args[2] = 0x00;
  		cmd.args[3] = 0x05;
  		cmd.args[4] = 0x00;
  		cmd.args[5] = 0x00;
  		cmd.args[6] = 0x55;
  		cmd.args[7] = 0x00;
  		cmd.len = 8;
  		ret = cx24117_cmd_execute_nolock(fe, &cmd);
  		if (ret != 0)
  			goto error;
  	}
  
  	cx24117_writereg(state, 0xce, 0xc0);
  	cx24117_writereg(state, 0xcf, 0x00);
  	cx24117_writereg(state, 0xe5, 0x04);
  
  	/* Get firmware version */
  	cmd.args[0] = CMD_FWVERSION;
  	cmd.len = 2;
  	for (i = 0; i < 4; i++) {
  		cmd.args[1] = i;
  		ret = cx24117_cmd_execute_nolock(fe, &cmd);
  		if (ret != 0)
  			goto error;
  		vers[i] = cx24117_readreg(state, 0x33);
  	}
  	dev_info(&state->priv->i2c->dev,
  		"%s: FW version %i.%i.%i.%i\n", __func__,
  		vers[0], vers[1], vers[2], vers[3]);
  	return 0;
  error:
  	state->priv->skip_fw_load = 0;
  	dev_err(&state->priv->i2c->dev, "%s() Error running FW.\n", __func__);
  	return ret;
  }
  
  static int cx24117_read_status(struct dvb_frontend *fe, enum fe_status *status)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	int lock;
  
  	lock = cx24117_readreg(state,
  		(state->demod == 0) ? CX24117_REG_SSTATUS0 :
  				      CX24117_REG_SSTATUS1) &
  		CX24117_STATUS_MASK;
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d status = 0x%02x\n",
  		__func__, state->demod, lock);
  
  	*status = 0;
  
  	if (lock & CX24117_HAS_SIGNAL)
  		*status |= FE_HAS_SIGNAL;
  	if (lock & CX24117_HAS_CARRIER)
  		*status |= FE_HAS_CARRIER;
  	if (lock & CX24117_HAS_VITERBI)
  		*status |= FE_HAS_VITERBI;
  	if (lock & CX24117_HAS_SYNCLOCK)
  		*status |= FE_HAS_SYNC | FE_HAS_LOCK;
  
  	return 0;
  }
  
  static int cx24117_read_ber(struct dvb_frontend *fe, u32 *ber)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	int ret;
  	u8 buf[4];
  	u8 base_reg = (state->demod == 0) ?
  			CX24117_REG_BER4_0 :
  			CX24117_REG_BER4_1;
  
  	ret = cx24117_readregN(state, base_reg, buf, 4);
  	if (ret != 0)
  		return ret;
  
  	*ber = (buf[0] << 24) | (buf[1] << 16) |
  		(buf[1] << 8) | buf[0];
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d ber=0x%04x\n",
  		__func__, state->demod, *ber);
  
  	return 0;
  }
  
  static int cx24117_read_signal_strength(struct dvb_frontend *fe,
  	u16 *signal_strength)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	struct cx24117_cmd cmd;
  	int ret;
  	u16 sig_reading;
  	u8 buf[2];
  	u8 reg = (state->demod == 0) ?
  		CX24117_REG_SSTATUS0 : CX24117_REG_SSTATUS1;
  
  	/* Read AGC accumulator register */
  	cmd.args[0] = CMD_GET_AGCACC;
  	cmd.args[1] = (u8) state->demod;
  	cmd.len = 2;
  	ret = cx24117_cmd_execute(fe, &cmd);
  	if (ret != 0)
  		return ret;
  
  	ret = cx24117_readregN(state, reg, buf, 2);
  	if (ret != 0)
  		return ret;
  	sig_reading = ((buf[0] & CX24117_SIGNAL_MASK) << 2) | buf[1];
  
  	*signal_strength = -100 * sig_reading + 94324;
  
  	dev_dbg(&state->priv->i2c->dev,
  		"%s() demod%d raw / cooked = 0x%04x / 0x%04x\n",
  		__func__, state->demod, sig_reading, *signal_strength);
  
  	return 0;
  }
  
  static int cx24117_read_snr(struct dvb_frontend *fe, u16 *snr)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	int ret;
  	u8 buf[2];
  	u8 reg = (state->demod == 0) ?
  		CX24117_REG_QUALITY2_0 : CX24117_REG_QUALITY2_1;
  
  	ret = cx24117_readregN(state, reg, buf, 2);
  	if (ret != 0)
  		return ret;
  
  	*snr = (buf[0] << 8) | buf[1];
  
  	dev_dbg(&state->priv->i2c->dev,
  		"%s() demod%d snr = 0x%04x\n",
  		__func__, state->demod, *snr);
  
  	return ret;
  }
  
  static int cx24117_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	enum fe_delivery_system delsys = fe->dtv_property_cache.delivery_system;
  	int ret;
  	u8 buf[2];
  	u8 reg = (state->demod == 0) ?
  		CX24117_REG_DVBS_UCB2_0 :
  		CX24117_REG_DVBS_UCB2_1;
  
  	switch (delsys) {
  	case SYS_DVBS:
  		break;
  	case SYS_DVBS2:
  		reg += (CX24117_REG_DVBS2_UCB2_0 - CX24117_REG_DVBS_UCB2_0);
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	ret = cx24117_readregN(state, reg, buf, 2);
  	if (ret != 0)
  		return ret;
  	*ucblocks = (buf[0] << 8) | buf[1];
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d ucb=0x%04x\n",
  		__func__, state->demod, *ucblocks);
  
  	return 0;
  }
  
  /* Overwrite the current tuning params, we are about to tune */
  static void cx24117_clone_params(struct dvb_frontend *fe)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	state->dcur = state->dnxt;
  }
  
  /* Wait for LNB */
  static int cx24117_wait_for_lnb(struct dvb_frontend *fe)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	int i;
  	u8 val, reg = (state->demod == 0) ? CX24117_REG_QSTATUS0 :
  					    CX24117_REG_QSTATUS1;
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d qstatus = 0x%02x\n",
  		__func__, state->demod, cx24117_readreg(state, reg));
  
  	/* Wait for up to 300 ms */
  	for (i = 0; i < 10; i++) {
  		val = cx24117_readreg(state, reg) & 0x01;
  		if (val != 0)
  			return 0;
  		msleep(30);
  	}
  
  	dev_warn(&state->priv->i2c->dev, "%s: demod%d LNB not ready\n",
  		KBUILD_MODNAME, state->demod);
  
  	return -ETIMEDOUT; /* -EBUSY ? */
  }
  
  static int cx24117_set_voltage(struct dvb_frontend *fe,
  			       enum fe_sec_voltage voltage)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	struct cx24117_cmd cmd;
  	int ret;
  	u8 reg = (state->demod == 0) ? 0x10 : 0x20;
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d %s\n",
  		__func__, state->demod,
  		voltage == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
  		voltage == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" :
  		"SEC_VOLTAGE_OFF");
  
  	/* Prepare a set GPIO logic level CMD */
  	cmd.args[0] = CMD_SET_GPIOOUT;
  	cmd.args[2] = reg; /* mask */
  	cmd.len = 3;
  
  	if ((voltage == SEC_VOLTAGE_13) ||
  	    (voltage == SEC_VOLTAGE_18)) {
  		/* power on LNB */
  		cmd.args[1] = reg;
  		ret = cx24117_cmd_execute(fe, &cmd);
  		if (ret != 0)
  			return ret;
  
  		ret = cx24117_wait_for_lnb(fe);
  		if (ret != 0)
  			return ret;
  
  		/* Wait for voltage/min repeat delay */
  		msleep(100);
  
  		/* Set 13V/18V select pin */
  		cmd.args[0] = CMD_LNBDCLEVEL;
  		cmd.args[1] = state->demod ? 0 : 1;
  		cmd.args[2] = (voltage == SEC_VOLTAGE_18 ? 0x01 : 0x00);
  		cmd.len = 3;
  		ret = cx24117_cmd_execute(fe, &cmd);
  
  		/* Min delay time before DiSEqC send */
  		msleep(20);
  	} else {
  		/* power off LNB */
  		cmd.args[1] = 0x00;
  		ret = cx24117_cmd_execute(fe, &cmd);
  	}
  
  	return ret;
  }
  
  static int cx24117_set_tone(struct dvb_frontend *fe,
  			    enum fe_sec_tone_mode tone)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	struct cx24117_cmd cmd;
  	int ret;
  
  	dev_dbg(&state->priv->i2c->dev, "%s(%d) demod%d\n",
  		__func__, state->demod, tone);
  	if ((tone != SEC_TONE_ON) && (tone != SEC_TONE_OFF)) {
  		dev_warn(&state->priv->i2c->dev, "%s: demod%d invalid tone=%d\n",
  			KBUILD_MODNAME, state->demod, tone);
  		return -EINVAL;
  	}
  
  	/* Wait for LNB ready */
  	ret = cx24117_wait_for_lnb(fe);
  	if (ret != 0)
  		return ret;
  
  	/* Min delay time after DiSEqC send */
  	msleep(20);
  
  	/* Set the tone */
  	cmd.args[0] = CMD_LNBPCBCONFIG;
  	cmd.args[1] = (state->demod ? 0 : 1);
  	cmd.args[2] = 0x00;
  	cmd.args[3] = 0x00;
  	cmd.len = 5;
  	switch (tone) {
  	case SEC_TONE_ON:
  		cmd.args[4] = 0x01;
  		break;
  	case SEC_TONE_OFF:
  		cmd.args[4] = 0x00;
  		break;
  	}
  
  	msleep(20);
  
  	return cx24117_cmd_execute(fe, &cmd);
  }
  
  /* Initialise DiSEqC */
  static int cx24117_diseqc_init(struct dvb_frontend *fe)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  
  	/* Prepare a DiSEqC command */
  	state->dsec_cmd.args[0] = CMD_LNBSEND;
  
  	/* demod */
  	state->dsec_cmd.args[CX24117_DISEQC_DEMOD] = state->demod ? 0 : 1;
  
  	/* DiSEqC burst */
  	state->dsec_cmd.args[CX24117_DISEQC_BURST] = CX24117_DISEQC_MINI_A;
  
  	/* Unknown */
  	state->dsec_cmd.args[CX24117_DISEQC_ARG3_2] = 0x02;
  	state->dsec_cmd.args[CX24117_DISEQC_ARG4_0] = 0x00;
  
  	/* Continuation flag? */
  	state->dsec_cmd.args[CX24117_DISEQC_ARG5_0] = 0x00;
  
  	/* DiSEqC message length */
  	state->dsec_cmd.args[CX24117_DISEQC_MSGLEN] = 0x00;
  
  	/* Command length */
  	state->dsec_cmd.len = 7;
  
  	return 0;
  }
  
  /* Send DiSEqC message */
  static int cx24117_send_diseqc_msg(struct dvb_frontend *fe,
  	struct dvb_diseqc_master_cmd *d)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	int i, ret;
  
  	/* Dump DiSEqC message */
  	dev_dbg(&state->priv->i2c->dev, "%s: demod %d (",
  		__func__, state->demod);
  	for (i = 0; i < d->msg_len; i++)
  		dev_dbg(&state->priv->i2c->dev, "0x%02x ", d->msg[i]);
  	dev_dbg(&state->priv->i2c->dev, ")\n");
  
  	/* Validate length */
  	if (d->msg_len > sizeof(d->msg))
  		return -EINVAL;
  
  	/* DiSEqC message */
  	for (i = 0; i < d->msg_len; i++)
  		state->dsec_cmd.args[CX24117_DISEQC_MSGOFS + i] = d->msg[i];
  
  	/* DiSEqC message length */
  	state->dsec_cmd.args[CX24117_DISEQC_MSGLEN] = d->msg_len;
  
  	/* Command length */
  	state->dsec_cmd.len = CX24117_DISEQC_MSGOFS +
  		state->dsec_cmd.args[CX24117_DISEQC_MSGLEN];
  
  	/*
  	 * Message is sent with derived else cached burst
  	 *
  	 * WRITE PORT GROUP COMMAND 38
  	 *
  	 * 0/A/A: E0 10 38 F0..F3
  	 * 1/B/B: E0 10 38 F4..F7
  	 * 2/C/A: E0 10 38 F8..FB
  	 * 3/D/B: E0 10 38 FC..FF
  	 *
  	 * databyte[3]= 8421:8421
  	 *              ABCD:WXYZ
  	 *              CLR :SET
  	 *
  	 *              WX= PORT SELECT 0..3    (X=TONEBURST)
  	 *              Y = VOLTAGE             (0=13V, 1=18V)
  	 *              Z = BAND                (0=LOW, 1=HIGH(22K))
  	 */
  	if (d->msg_len >= 4 && d->msg[2] == 0x38)
  		state->dsec_cmd.args[CX24117_DISEQC_BURST] =
  			((d->msg[3] & 4) >> 2);
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d burst=%d\n",
  		__func__, state->demod,
  		state->dsec_cmd.args[CX24117_DISEQC_BURST]);
  
  	/* Wait for LNB ready */
  	ret = cx24117_wait_for_lnb(fe);
  	if (ret != 0)
  		return ret;
  
  	/* Wait for voltage/min repeat delay */
  	msleep(100);
  
  	/* Command */
  	ret = cx24117_cmd_execute(fe, &state->dsec_cmd);
  	if (ret != 0)
  		return ret;
  	/*
  	 * Wait for send
  	 *
  	 * Eutelsat spec:
  	 * >15ms delay          + (XXX determine if FW does this, see set_tone)
  	 *  13.5ms per byte     +
  	 * >15ms delay          +
  	 *  12.5ms burst        +
  	 * >15ms delay            (XXX determine if FW does this, see set_tone)
  	 */
  	msleep((state->dsec_cmd.args[CX24117_DISEQC_MSGLEN] << 4) + 60);
  
  	return 0;
  }
  
  /* Send DiSEqC burst */
  static int cx24117_diseqc_send_burst(struct dvb_frontend *fe,
  	enum fe_sec_mini_cmd burst)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  
  	dev_dbg(&state->priv->i2c->dev, "%s(%d) demod=%d\n",
  		__func__, burst, state->demod);
  
  	/* DiSEqC burst */
  	if (burst == SEC_MINI_A)
  		state->dsec_cmd.args[CX24117_DISEQC_BURST] =
  			CX24117_DISEQC_MINI_A;
  	else if (burst == SEC_MINI_B)
  		state->dsec_cmd.args[CX24117_DISEQC_BURST] =
  			CX24117_DISEQC_MINI_B;
  	else
  		return -EINVAL;
  
  	return 0;
  }
  
  static int cx24117_get_priv(struct cx24117_priv **priv,
  	struct i2c_adapter *i2c, u8 client_address)
  {
  	int ret;
  
  	mutex_lock(&cx24117_list_mutex);
  	ret = hybrid_tuner_request_state(struct cx24117_priv, (*priv),
  		hybrid_tuner_instance_list, i2c, client_address, "cx24117");
  	mutex_unlock(&cx24117_list_mutex);
  
  	return ret;
  }
  
  static void cx24117_release_priv(struct cx24117_priv *priv)
  {
  	mutex_lock(&cx24117_list_mutex);
  	if (priv != NULL)
  		hybrid_tuner_release_state(priv);
  	mutex_unlock(&cx24117_list_mutex);
  }
  
  static void cx24117_release(struct dvb_frontend *fe)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	dev_dbg(&state->priv->i2c->dev, "%s demod%d\n",
  		__func__, state->demod);
  	cx24117_release_priv(state->priv);
  	kfree(state);
  }
  
  static const struct dvb_frontend_ops cx24117_ops;
  
  struct dvb_frontend *cx24117_attach(const struct cx24117_config *config,
  	struct i2c_adapter *i2c)
  {
  	struct cx24117_state *state = NULL;
  	struct cx24117_priv *priv = NULL;
  	int demod = 0;
  
  	/* get the common data struct for both demods */
  	demod = cx24117_get_priv(&priv, i2c, config->demod_address);
  
  	switch (demod) {
  	case 0:
  		dev_err(&i2c->dev,
  			"%s: Error attaching frontend %d\n",
  			KBUILD_MODNAME, demod);
  		goto error1;
  		break;
  	case 1:
  		/* new priv instance */
  		priv->i2c = i2c;
  		priv->demod_address = config->demod_address;
  		mutex_init(&priv->fe_lock);
  		break;
  	default:
  		/* existing priv instance */
  		break;
  	}
  
  	/* allocate memory for the internal state */
  	state = kzalloc(sizeof(struct cx24117_state), GFP_KERNEL);
  	if (state == NULL)
  		goto error2;
  
  	state->demod = demod - 1;
  	state->priv = priv;
  
  	dev_info(&state->priv->i2c->dev,
  		"%s: Attaching frontend %d\n",
  		KBUILD_MODNAME, state->demod);
  
  	/* create dvb_frontend */
  	memcpy(&state->frontend.ops, &cx24117_ops,
  		sizeof(struct dvb_frontend_ops));
  	state->frontend.demodulator_priv = state;
  	return &state->frontend;
  
  error2:
  	cx24117_release_priv(priv);
  error1:
  	return NULL;
  }
  EXPORT_SYMBOL_GPL(cx24117_attach);
  
  /*
   * Initialise or wake up device
   *
   * Power config will reset and load initial firmware if required
   */
  static int cx24117_initfe(struct dvb_frontend *fe)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	struct cx24117_cmd cmd;
  	int ret;
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d\n",
  		__func__, state->demod);
  
  	mutex_lock(&state->priv->fe_lock);
  
  	/* Set sleep mode off */
  	cmd.args[0] = CMD_SET_SLEEPMODE;
  	cmd.args[1] = (state->demod ? 1 : 0);
  	cmd.args[2] = 0;
  	cmd.len = 3;
  	ret = cx24117_cmd_execute_nolock(fe, &cmd);
  	if (ret != 0)
  		goto exit;
  
  	ret = cx24117_diseqc_init(fe);
  	if (ret != 0)
  		goto exit;
  
  	/* Set BER control */
  	cmd.args[0] = CMD_BERCTRL;
  	cmd.args[1] = (state->demod ? 1 : 0);
  	cmd.args[2] = 0x10;
  	cmd.args[3] = 0x10;
  	cmd.len = 4;
  	ret = cx24117_cmd_execute_nolock(fe, &cmd);
  	if (ret != 0)
  		goto exit;
  
  	/* Set RS correction (enable/disable) */
  	cmd.args[0] = CMD_ENABLERSCORR;
  	cmd.args[1] = (state->demod ? 1 : 0);
  	cmd.args[2] = CX24117_OCC;
  	cmd.len = 3;
  	ret = cx24117_cmd_execute_nolock(fe, &cmd);
  	if (ret != 0)
  		goto exit;
  
  	/* Set GPIO direction */
  	/* Set as output - controls LNB power on/off */
  	cmd.args[0] = CMD_SET_GPIODIR;
  	cmd.args[1] = 0x30;
  	cmd.args[2] = 0x30;
  	cmd.len = 3;
  	ret = cx24117_cmd_execute_nolock(fe, &cmd);
  
  exit:
  	mutex_unlock(&state->priv->fe_lock);
  
  	return ret;
  }
  
  /*
   * Put device to sleep
   */
  static int cx24117_sleep(struct dvb_frontend *fe)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	struct cx24117_cmd cmd;
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d\n",
  		__func__, state->demod);
  
  	/* Set sleep mode on */
  	cmd.args[0] = CMD_SET_SLEEPMODE;
  	cmd.args[1] = (state->demod ? 1 : 0);
  	cmd.args[2] = 1;
  	cmd.len = 3;
  	return cx24117_cmd_execute(fe, &cmd);
  }
  
  /* dvb-core told us to tune, the tv property cache will be complete,
   * it's safe for is to pull values and use them for tuning purposes.
   */
  static int cx24117_set_frontend(struct dvb_frontend *fe)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  	struct cx24117_cmd cmd;
  	enum fe_status tunerstat;
  	int i, status, ret, retune = 1;
  	u8 reg_clkdiv, reg_ratediv;
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d\n",
  		__func__, state->demod);
  
  	switch (c->delivery_system) {
  	case SYS_DVBS:
  		dev_dbg(&state->priv->i2c->dev, "%s() demod%d DVB-S\n",
  			__func__, state->demod);
  
  		/* Only QPSK is supported for DVB-S */
  		if (c->modulation != QPSK) {
  			dev_dbg(&state->priv->i2c->dev,
  				"%s() demod%d unsupported modulation (%d)\n",
  				__func__, state->demod, c->modulation);
  			return -EINVAL;
  		}
  
  		/* Pilot doesn't exist in DVB-S, turn bit off */
  		state->dnxt.pilot_val = CX24117_PILOT_OFF;
  
  		/* DVB-S only supports 0.35 */
  		state->dnxt.rolloff_val = CX24117_ROLLOFF_035;
  		break;
  
  	case SYS_DVBS2:
  		dev_dbg(&state->priv->i2c->dev, "%s() demod%d DVB-S2\n",
  			__func__, state->demod);
  
  		/*
  		 * NBC 8PSK/QPSK with DVB-S is supported for DVB-S2,
  		 * but not hardware auto detection
  		 */
  		if (c->modulation != PSK_8 && c->modulation != QPSK) {
  			dev_dbg(&state->priv->i2c->dev,
  				"%s() demod%d unsupported modulation (%d)\n",
  				__func__, state->demod, c->modulation);
  			return -EOPNOTSUPP;
  		}
  
  		switch (c->pilot) {
  		case PILOT_AUTO:
  			state->dnxt.pilot_val = CX24117_PILOT_AUTO;
  			break;
  		case PILOT_OFF:
  			state->dnxt.pilot_val = CX24117_PILOT_OFF;
  			break;
  		case PILOT_ON:
  			state->dnxt.pilot_val = CX24117_PILOT_ON;
  			break;
  		default:
  			dev_dbg(&state->priv->i2c->dev,
  				"%s() demod%d unsupported pilot mode (%d)\n",
  				__func__, state->demod, c->pilot);
  			return -EOPNOTSUPP;
  		}
  
  		switch (c->rolloff) {
  		case ROLLOFF_20:
  			state->dnxt.rolloff_val = CX24117_ROLLOFF_020;
  			break;
  		case ROLLOFF_25:
  			state->dnxt.rolloff_val = CX24117_ROLLOFF_025;
  			break;
  		case ROLLOFF_35:
  			state->dnxt.rolloff_val = CX24117_ROLLOFF_035;
  			break;
  		case ROLLOFF_AUTO:
  			state->dnxt.rolloff_val = CX24117_ROLLOFF_035;
  			/* soft-auto rolloff */
  			retune = 3;
  			break;
  		default:
  			dev_warn(&state->priv->i2c->dev,
  				"%s: demod%d unsupported rolloff (%d)\n",
  				KBUILD_MODNAME, state->demod, c->rolloff);
  			return -EOPNOTSUPP;
  		}
  		break;
  
  	default:
  		dev_warn(&state->priv->i2c->dev,
  			"%s: demod %d unsupported delivery system (%d)\n",
  			KBUILD_MODNAME, state->demod, c->delivery_system);
  		return -EINVAL;
  	}
  
  	state->dnxt.delsys = c->delivery_system;
  	state->dnxt.modulation = c->modulation;
  	state->dnxt.frequency = c->frequency;
  	state->dnxt.pilot = c->pilot;
  	state->dnxt.rolloff = c->rolloff;
  
  	ret = cx24117_set_inversion(state, c->inversion);
  	if (ret !=  0)
  		return ret;
  
  	ret = cx24117_set_fec(state,
  		c->delivery_system, c->modulation, c->fec_inner);
  	if (ret !=  0)
  		return ret;
  
  	ret = cx24117_set_symbolrate(state, c->symbol_rate);
  	if (ret !=  0)
  		return ret;
  
  	/* discard the 'current' tuning parameters and prepare to tune */
  	cx24117_clone_params(fe);
  
  	dev_dbg(&state->priv->i2c->dev,
  		"%s: delsys      = %d\n", __func__, state->dcur.delsys);
  	dev_dbg(&state->priv->i2c->dev,
  		"%s: modulation  = %d\n", __func__, state->dcur.modulation);
  	dev_dbg(&state->priv->i2c->dev,
  		"%s: frequency   = %d\n", __func__, state->dcur.frequency);
  	dev_dbg(&state->priv->i2c->dev,
  		"%s: pilot       = %d (val = 0x%02x)\n", __func__,
  		state->dcur.pilot, state->dcur.pilot_val);
  	dev_dbg(&state->priv->i2c->dev,
  		"%s: retune      = %d\n", __func__, retune);
  	dev_dbg(&state->priv->i2c->dev,
  		"%s: rolloff     = %d (val = 0x%02x)\n", __func__,
  		state->dcur.rolloff, state->dcur.rolloff_val);
  	dev_dbg(&state->priv->i2c->dev,
  		"%s: symbol_rate = %d\n", __func__, state->dcur.symbol_rate);
  	dev_dbg(&state->priv->i2c->dev,
  		"%s: FEC         = %d (mask/val = 0x%02x/0x%02x)\n", __func__,
  		state->dcur.fec, state->dcur.fec_mask, state->dcur.fec_val);
  	dev_dbg(&state->priv->i2c->dev,
  		"%s: Inversion   = %d (val = 0x%02x)\n", __func__,
  		state->dcur.inversion, state->dcur.inversion_val);
  
  	/* Prepare a tune request */
  	cmd.args[0] = CMD_TUNEREQUEST;
  
  	/* demod */
  	cmd.args[1] = state->demod;
  
  	/* Frequency */
  	cmd.args[2] = (state->dcur.frequency & 0xff0000) >> 16;
  	cmd.args[3] = (state->dcur.frequency & 0x00ff00) >> 8;
  	cmd.args[4] = (state->dcur.frequency & 0x0000ff);
  
  	/* Symbol Rate */
  	cmd.args[5] = ((state->dcur.symbol_rate / 1000) & 0xff00) >> 8;
  	cmd.args[6] = ((state->dcur.symbol_rate / 1000) & 0x00ff);
  
  	/* Automatic Inversion */
  	cmd.args[7] = state->dcur.inversion_val;
  
  	/* Modulation / FEC / Pilot */
  	cmd.args[8] = state->dcur.fec_val | state->dcur.pilot_val;
  
  	cmd.args[9] = CX24117_SEARCH_RANGE_KHZ >> 8;
  	cmd.args[10] = CX24117_SEARCH_RANGE_KHZ & 0xff;
  
  	cmd.args[11] = state->dcur.rolloff_val;
  	cmd.args[12] = state->dcur.fec_mask;
  
  	if (state->dcur.symbol_rate > 30000000) {
  		reg_ratediv = 0x04;
  		reg_clkdiv = 0x02;
  	} else if (state->dcur.symbol_rate > 10000000) {
  		reg_ratediv = 0x06;
  		reg_clkdiv = 0x03;
  	} else {
  		reg_ratediv = 0x0a;
  		reg_clkdiv = 0x05;
  	}
  
  	cmd.args[13] = reg_ratediv;
  	cmd.args[14] = reg_clkdiv;
  
  	cx24117_writereg(state, (state->demod == 0) ?
  		CX24117_REG_CLKDIV0 : CX24117_REG_CLKDIV1, reg_clkdiv);
  	cx24117_writereg(state, (state->demod == 0) ?
  		CX24117_REG_RATEDIV0 : CX24117_REG_RATEDIV1, reg_ratediv);
  
  	cmd.args[15] = CX24117_PNE;
  	cmd.len = 16;
  
  	do {
  		/* Reset status register */
  		status = cx24117_readreg(state, (state->demod == 0) ?
  			CX24117_REG_SSTATUS0 : CX24117_REG_SSTATUS1) &
  			CX24117_SIGNAL_MASK;
  
  		dev_dbg(&state->priv->i2c->dev,
  			"%s() demod%d status_setfe = %02x\n",
  			__func__, state->demod, status);
  
  		cx24117_writereg(state, (state->demod == 0) ?
  			CX24117_REG_SSTATUS0 : CX24117_REG_SSTATUS1, status);
  
  		/* Tune */
  		ret = cx24117_cmd_execute(fe, &cmd);
  		if (ret != 0)
  			break;
  
  		/*
  		 * Wait for up to 500 ms before retrying
  		 *
  		 * If we are able to tune then generally it occurs within 100ms.
  		 * If it takes longer, try a different rolloff setting.
  		 */
  		for (i = 0; i < 50; i++) {
  			cx24117_read_status(fe, &tunerstat);
  			status = tunerstat & (FE_HAS_SIGNAL | FE_HAS_SYNC);
  			if (status == (FE_HAS_SIGNAL | FE_HAS_SYNC)) {
  				dev_dbg(&state->priv->i2c->dev,
  					"%s() demod%d tuned\n",
  					__func__, state->demod);
  				return 0;
  			}
  			msleep(20);
  		}
  
  		dev_dbg(&state->priv->i2c->dev, "%s() demod%d not tuned\n",
  			__func__, state->demod);
  
  		/* try next rolloff value */
  		if (state->dcur.rolloff == 3)
  			cmd.args[11]--;
  
  	} while (--retune);
  	return -EINVAL;
  }
  
  static int cx24117_tune(struct dvb_frontend *fe, bool re_tune,
  	unsigned int mode_flags, unsigned int *delay, enum fe_status *status)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  
  	dev_dbg(&state->priv->i2c->dev, "%s() demod%d\n",
  		__func__, state->demod);
  
  	*delay = HZ / 5;
  	if (re_tune) {
  		int ret = cx24117_set_frontend(fe);
  		if (ret)
  			return ret;
  	}
  	return cx24117_read_status(fe, status);
  }
  
  static enum dvbfe_algo cx24117_get_algo(struct dvb_frontend *fe)
  {
  	return DVBFE_ALGO_HW;
  }
  
  static int cx24117_get_frontend(struct dvb_frontend *fe,
  				struct dtv_frontend_properties *c)
  {
  	struct cx24117_state *state = fe->demodulator_priv;
  	struct cx24117_cmd cmd;
  	u8 reg, st, inv;
  	int ret, idx;
  	unsigned int freq;
  	short srate_os, freq_os;
  
  	u8 buf[0x1f-4];
  
  	/* Read current tune parameters */
  	cmd.args[0] = CMD_GETCTLACC;
  	cmd.args[1] = (u8) state->demod;
  	cmd.len = 2;
  	ret = cx24117_cmd_execute(fe, &cmd);
  	if (ret != 0)
  		return ret;
  
  	/* read all required regs at once */
  	reg = (state->demod == 0) ? CX24117_REG_FREQ3_0 : CX24117_REG_FREQ3_1;
  	ret = cx24117_readregN(state, reg, buf, 0x1f-4);
  	if (ret != 0)
  		return ret;
  
  	st = buf[5];
  
  	/* get spectral inversion */
  	inv = (((state->demod == 0) ? ~st : st) >> 6) & 1;
  	if (inv == 0)
  		c->inversion = INVERSION_OFF;
  	else
  		c->inversion = INVERSION_ON;
  
  	/* modulation and fec */
  	idx = st & 0x3f;
  	if (c->delivery_system == SYS_DVBS2) {
  		if (idx > 11)
  			idx += 9;
  		else
  			idx += 7;
  	}
  
  	c->modulation = cx24117_modfec_modes[idx].modulation;
  	c->fec_inner = cx24117_modfec_modes[idx].fec;
  
  	/* frequency */
  	freq = (buf[0] << 16) | (buf[1] << 8) | buf[2];
  	freq_os = (buf[8] << 8) | buf[9];
  	c->frequency = freq + freq_os;
  
  	/* symbol rate */
  	srate_os = (buf[10] << 8) | buf[11];
  	c->symbol_rate = -1000 * srate_os + state->dcur.symbol_rate;
  	return 0;
  }
  
  static const struct dvb_frontend_ops cx24117_ops = {
  	.delsys = { SYS_DVBS, SYS_DVBS2 },
  	.info = {
  		.name = "Conexant CX24117/CX24132",
  		.frequency_min_hz =  950 * MHz,
  		.frequency_max_hz = 2150 * MHz,
  		.frequency_stepsize_hz = 1011 * kHz,
  		.frequency_tolerance_hz = 5 * MHz,
  		.symbol_rate_min = 1000000,
  		.symbol_rate_max = 45000000,
  		.caps = FE_CAN_INVERSION_AUTO |
  			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_AUTO |
  			FE_CAN_2G_MODULATION |
  			FE_CAN_QPSK | FE_CAN_RECOVER
  	},
  
  	.release = cx24117_release,
  
  	.init = cx24117_initfe,
  	.sleep = cx24117_sleep,
  	.read_status = cx24117_read_status,
  	.read_ber = cx24117_read_ber,
  	.read_signal_strength = cx24117_read_signal_strength,
  	.read_snr = cx24117_read_snr,
  	.read_ucblocks = cx24117_read_ucblocks,
  	.set_tone = cx24117_set_tone,
  	.set_voltage = cx24117_set_voltage,
  	.diseqc_send_master_cmd = cx24117_send_diseqc_msg,
  	.diseqc_send_burst = cx24117_diseqc_send_burst,
  	.get_frontend_algo = cx24117_get_algo,
  	.tune = cx24117_tune,
  
  	.set_frontend = cx24117_set_frontend,
  	.get_frontend = cx24117_get_frontend,
  };
  
  
  MODULE_DESCRIPTION("DVB Frontend module for Conexant cx24117/cx24132 hardware");
  MODULE_AUTHOR("Luis Alves (ljalvs@gmail.com)");
  MODULE_LICENSE("GPL");
  MODULE_VERSION("1.1");
  MODULE_FIRMWARE(CX24117_DEFAULT_FIRMWARE);
  
  