drivers/staging/sbe-2t3e3/cpld.c - linux - Git at Google

 /*
  * SBE 2T3E3 synchronous serial card driver for Linux
  *
  * Copyright (C) 2009-2010 Krzysztof Halasa <khc@pm.waw.pl>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of version 2 of the GNU General Public License
  * as published by the Free Software Foundation.
  *
  * This code is based on a driver written by SBE Inc.
  */

 #include <linux/delay.h>
 #include "2t3e3.h"
 #include "ctrl.h"

 #define bootrom_set_bit(sc, reg, bit)				\
 	bootrom_write((sc), (reg),				\
 		      bootrom_read((sc), (reg)) | (bit))

 #define bootrom_clear_bit(sc, reg, bit)				\
 	bootrom_write((sc), (reg),				\
 		      bootrom_read((sc), (reg)) & ~(bit))

 static inline void cpld_set_bit(struct channel *channel, unsigned reg, u32 bit)
 {
 	unsigned long flags;
 	spin_lock_irqsave(&channel->card->bootrom_lock, flags);
 	bootrom_set_bit(channel, CPLD_MAP_REG(reg, channel), bit);
 	spin_unlock_irqrestore(&channel->card->bootrom_lock, flags);
 }

 static inline void cpld_clear_bit(struct channel *channel, unsigned reg, u32 bit)
 {
 	unsigned long flags;
 	spin_lock_irqsave(&channel->card->bootrom_lock, flags);
 	bootrom_clear_bit(channel, CPLD_MAP_REG(reg, channel), bit);
 	spin_unlock_irqrestore(&channel->card->bootrom_lock, flags);
 }

 void cpld_init(struct channel *sc)
 {
 	u32 val;
 #if 0
 	/* reset LIU and Framer */
 	val = cpld_val_map[SBE_2T3E3_CPLD_VAL_LIU_FRAMER_RESET][sc->h.slot];
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_STATIC_RESET, val);
 	udelay(10000); /* TODO - how long? */
 	val = 0;
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_STATIC_RESET, val);
 #endif

 	/* PCRA */
 	val = SBE_2T3E3_CPLD_VAL_CRC32 |
 		cpld_val_map[SBE_2T3E3_CPLD_VAL_LOOP_TIMING_SOURCE][sc->h.slot];
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRA, val);

 	/* PCRB */
 	val = 0;
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRB, val);

 	/* PCRC */
 	val = 0;
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRC, val);

 	/* PBWF */
 	val = 0;
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PBWF, val);

 	/* PBWL */
 	val = 0;
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PBWL, val);

 	/* PLTR */
 	val = SBE_2T3E3_CPLD_VAL_LCV_COUNTER;
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PLTR, val);
 	udelay(1000);

 	/* PLCR */
 	val = 0;
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PLCR, val);
 	udelay(1000);

 	/* PPFR */
 	val = 0x55;
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PPFR, val);
 	/* TODO: this doesn't work!!! */

 	/* SERIAL_CHIP_SELECT */
 	val = 0;
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_SERIAL_CHIP_SELECT, val);

 	/* PICSR */
 	val = SBE_2T3E3_CPLD_VAL_DMO_SIGNAL_DETECTED |
 		SBE_2T3E3_CPLD_VAL_RECEIVE_LOSS_OF_LOCK_DETECTED |
 		SBE_2T3E3_CPLD_VAL_RECEIVE_LOSS_OF_SIGNAL_DETECTED;
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PICSR, val);

 	cpld_start_intr(sc);

 	udelay(1000);
 }

 void cpld_start_intr(struct channel *sc)
 {
 	u32 val;

 	/* PIER */
 	val = SBE_2T3E3_CPLD_VAL_INTERRUPT_FROM_ETHERNET_ENABLE |
 		SBE_2T3E3_CPLD_VAL_INTERRUPT_FROM_FRAMER_ENABLE;
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PIER, val);
 #if 0
 	/*
 	  do you want to hang up your computer?
 	  ENABLE REST OF INTERRUPTS !!!
 	  you have been warned :).
 	*/
 #endif
 }

 void cpld_stop_intr(struct channel *sc)
 {
 	u32 val;

 	/* PIER */
 	val = 0;
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PIER, val);
 }

 void cpld_set_frame_mode(struct channel *sc, u32 mode)
 {
 	if (sc->p.frame_mode == mode)
 		return;

 	switch (mode) {
 	case SBE_2T3E3_FRAME_MODE_HDLC:
 		cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
 			       SBE_2T3E3_CPLD_VAL_TRANSPARENT_MODE |
 			       SBE_2T3E3_CPLD_VAL_RAW_MODE);
 		exar7250_unipolar_onoff(sc, SBE_2T3E3_OFF);
 		exar7300_unipolar_onoff(sc, SBE_2T3E3_OFF);
 		break;
 	case SBE_2T3E3_FRAME_MODE_TRANSPARENT:
 		cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
 			       SBE_2T3E3_CPLD_VAL_RAW_MODE);
 		cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
 			     SBE_2T3E3_CPLD_VAL_TRANSPARENT_MODE);
 		exar7250_unipolar_onoff(sc, SBE_2T3E3_OFF);
 		exar7300_unipolar_onoff(sc, SBE_2T3E3_OFF);
 		break;
 	case SBE_2T3E3_FRAME_MODE_RAW:
 		cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
 			     SBE_2T3E3_CPLD_VAL_RAW_MODE);
 		exar7250_unipolar_onoff(sc, SBE_2T3E3_ON);
 		exar7300_unipolar_onoff(sc, SBE_2T3E3_ON);
 		break;
 	default:
 		return;
 	}

 	sc->p.frame_mode = mode;
 }

 /* set rate of the local clock */
 void cpld_set_frame_type(struct channel *sc, u32 type)
 {
 	switch (type) {
 	case SBE_2T3E3_FRAME_TYPE_E3_G751:
 	case SBE_2T3E3_FRAME_TYPE_E3_G832:
 		cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
 			     SBE_2T3E3_CPLD_VAL_LOCAL_CLOCK_E3);
 		break;
 	case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
 	case SBE_2T3E3_FRAME_TYPE_T3_M13:
 		cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
 			       SBE_2T3E3_CPLD_VAL_LOCAL_CLOCK_E3);
 		break;
 	default:
 		return;
 	}
 }

 void cpld_set_scrambler(struct channel *sc, u32 mode)
 {
 	if (sc->p.scrambler == mode)
 		return;

 	switch (mode) {
 	case SBE_2T3E3_SCRAMBLER_OFF:
 		cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRB,
 			       SBE_2T3E3_CPLD_VAL_SCRAMBLER_ENABLE);
 		break;
 	case SBE_2T3E3_SCRAMBLER_LARSCOM:
 		cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRB,
 			       SBE_2T3E3_CPLD_VAL_SCRAMBLER_TYPE);
 		cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRB,
 			     SBE_2T3E3_CPLD_VAL_SCRAMBLER_ENABLE);
 		break;
 	case SBE_2T3E3_SCRAMBLER_ADC_KENTROX_DIGITAL:
 		cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRB,
 			     SBE_2T3E3_CPLD_VAL_SCRAMBLER_TYPE);
 		cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRB,
 			     SBE_2T3E3_CPLD_VAL_SCRAMBLER_ENABLE);
 		break;
 	default:
 		return;
 	}

 	sc->p.scrambler = mode;
 }


 void cpld_set_crc(struct channel *sc, u32 crc)
 {
 	if (sc->p.crc == crc)
 		return;

 	switch (crc) {
 	case SBE_2T3E3_CRC_16:
 		cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
 			       SBE_2T3E3_CPLD_VAL_CRC32);
 		break;
 	case SBE_2T3E3_CRC_32:
 		cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
 			     SBE_2T3E3_CPLD_VAL_CRC32);
 		break;
 	default:
 		return;
 	}

 	sc->p.crc = crc;
 }


 void cpld_select_panel(struct channel *sc, u32 panel)
 {
 	if (sc->p.panel == panel)
 		return;
 	switch (panel) {
 	case SBE_2T3E3_PANEL_FRONT:
 		cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
 			       SBE_2T3E3_CPLD_VAL_REAR_PANEL);
 		break;
 	case SBE_2T3E3_PANEL_REAR:
 		cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
 			     SBE_2T3E3_CPLD_VAL_REAR_PANEL);
 		break;
 	default:
 		return;
 	}

 	udelay(100);

 	sc->p.panel = panel;
 }


 extern void cpld_set_clock(struct channel *sc, u32 mode)
 {
 	if (sc->p.clock_source == mode)
 		return;

 	switch (mode) {
 	case SBE_2T3E3_TIMING_LOCAL:
 		cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
 			     SBE_2T3E3_CPLD_VAL_ALT);
 		break;
 	case SBE_2T3E3_TIMING_LOOP:
 		cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
 			       SBE_2T3E3_CPLD_VAL_ALT);
 		break;
 	default:
 		return;
 	}

 	sc->p.clock_source = mode;
 }

 void cpld_set_pad_count(struct channel *sc, u32 count)
 {
 	u32 val;

 	if (sc->p.pad_count == count)
 		return;

 	switch (count) {
 	case SBE_2T3E3_PAD_COUNT_1:
 		val = SBE_2T3E3_CPLD_VAL_PAD_COUNT_1;
 		break;
 	case SBE_2T3E3_PAD_COUNT_2:
 		val = SBE_2T3E3_CPLD_VAL_PAD_COUNT_2;
 		break;
 	case SBE_2T3E3_PAD_COUNT_3:
 		val = SBE_2T3E3_CPLD_VAL_PAD_COUNT_3;
 		break;
 	case SBE_2T3E3_PAD_COUNT_4:
 		val = SBE_2T3E3_CPLD_VAL_PAD_COUNT_4;
 		break;
 	default:
 		return;
 	}

 	cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRB,
 		       SBE_2T3E3_CPLD_VAL_PAD_COUNT);
 	cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRB, val);
 	sc->p.pad_count = count;
 }

 void cpld_LOS_update(struct channel *sc)
 {
 	u_int8_t los;

 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PICSR,
 		   SBE_2T3E3_CPLD_VAL_DMO_SIGNAL_DETECTED |
 		   SBE_2T3E3_CPLD_VAL_RECEIVE_LOSS_OF_LOCK_DETECTED |
 		   SBE_2T3E3_CPLD_VAL_RECEIVE_LOSS_OF_SIGNAL_DETECTED);
 	los = cpld_read(sc, SBE_2T3E3_CPLD_REG_PICSR) &
 		SBE_2T3E3_CPLD_VAL_RECEIVE_LOSS_OF_SIGNAL_DETECTED;

 	if (los != sc->s.LOS)
 		dev_info(&sc->pdev->dev, "SBE 2T3E3: LOS status: %s\n",
 			 los ? "Loss of signal" : "Signal OK");
 	sc->s.LOS = los;
 }

 void cpld_set_fractional_mode(struct channel *sc, u32 mode,
 			      u32 start, u32 stop)
 {
 	if (mode == SBE_2T3E3_FRACTIONAL_MODE_NONE) {
 		start = 0;
 		stop = 0;
 	}

 	if (sc->p.fractional_mode == mode && sc->p.bandwidth_start == start &&
 	    sc->p.bandwidth_stop == stop)
 		return;

 	switch (mode) {
 	case SBE_2T3E3_FRACTIONAL_MODE_NONE:
 		cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRC,
 			   SBE_2T3E3_CPLD_VAL_FRACTIONAL_MODE_NONE);
 		break;
 	case SBE_2T3E3_FRACTIONAL_MODE_0:
 		cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRC,
 			   SBE_2T3E3_CPLD_VAL_FRACTIONAL_MODE_0);
 		break;
 	case SBE_2T3E3_FRACTIONAL_MODE_1:
 		cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRC,
 			   SBE_2T3E3_CPLD_VAL_FRACTIONAL_MODE_1);
 		break;
 	case SBE_2T3E3_FRACTIONAL_MODE_2:
 		cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRC,
 			   SBE_2T3E3_CPLD_VAL_FRACTIONAL_MODE_2);
 		break;
 	default:
 		printk(KERN_ERR "wrong mode in set_fractional_mode\n");
 		return;
 	}

 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PBWF, start);
 	cpld_write(sc, SBE_2T3E3_CPLD_REG_PBWL, stop);

 	sc->p.fractional_mode = mode;
 	sc->p.bandwidth_start = start;
 	sc->p.bandwidth_stop = stop;
 }
	/*
	* SBE 2T3E3 synchronous serial card driver for Linux
	*
	* Copyright (C) 2009-2010 Krzysztof Halasa <khc@pm.waw.pl>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of version 2 of the GNU General Public License
	* as published by the Free Software Foundation.
	*
	* This code is based on a driver written by SBE Inc.
	*/

	#include <linux/delay.h>
	#include "2t3e3.h"
	#include "ctrl.h"

	#define bootrom_set_bit(sc, reg, bit) \
	bootrom_write((sc), (reg), \
	bootrom_read((sc), (reg)) \| (bit))

	#define bootrom_clear_bit(sc, reg, bit) \
	bootrom_write((sc), (reg), \
	bootrom_read((sc), (reg)) & ~(bit))

	static inline void cpld_set_bit(struct channel *channel, unsigned reg, u32 bit)
	{
	unsigned long flags;
	spin_lock_irqsave(&channel->card->bootrom_lock, flags);
	bootrom_set_bit(channel, CPLD_MAP_REG(reg, channel), bit);
	spin_unlock_irqrestore(&channel->card->bootrom_lock, flags);
	}

	static inline void cpld_clear_bit(struct channel *channel, unsigned reg, u32 bit)
	{
	unsigned long flags;
	spin_lock_irqsave(&channel->card->bootrom_lock, flags);
	bootrom_clear_bit(channel, CPLD_MAP_REG(reg, channel), bit);
	spin_unlock_irqrestore(&channel->card->bootrom_lock, flags);
	}

	void cpld_init(struct channel *sc)
	{
	u32 val;
	#if 0
	/* reset LIU and Framer */
	val = cpld_val_map[SBE_2T3E3_CPLD_VAL_LIU_FRAMER_RESET][sc->h.slot];
	cpld_write(sc, SBE_2T3E3_CPLD_REG_STATIC_RESET, val);
	udelay(10000); /* TODO - how long? */
	val = 0;
	cpld_write(sc, SBE_2T3E3_CPLD_REG_STATIC_RESET, val);
	#endif

	/* PCRA */
	val = SBE_2T3E3_CPLD_VAL_CRC32 \|
	cpld_val_map[SBE_2T3E3_CPLD_VAL_LOOP_TIMING_SOURCE][sc->h.slot];
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRA, val);

	/* PCRB */
	val = 0;
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRB, val);

	/* PCRC */
	val = 0;
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRC, val);

	/* PBWF */
	val = 0;
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PBWF, val);

	/* PBWL */
	val = 0;
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PBWL, val);

	/* PLTR */
	val = SBE_2T3E3_CPLD_VAL_LCV_COUNTER;
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PLTR, val);
	udelay(1000);

	/* PLCR */
	val = 0;
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PLCR, val);
	udelay(1000);

	/* PPFR */
	val = 0x55;
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PPFR, val);
	/* TODO: this doesn't work!!! */

	/* SERIAL_CHIP_SELECT */
	val = 0;
	cpld_write(sc, SBE_2T3E3_CPLD_REG_SERIAL_CHIP_SELECT, val);

	/* PICSR */
	val = SBE_2T3E3_CPLD_VAL_DMO_SIGNAL_DETECTED \|
	SBE_2T3E3_CPLD_VAL_RECEIVE_LOSS_OF_LOCK_DETECTED \|
	SBE_2T3E3_CPLD_VAL_RECEIVE_LOSS_OF_SIGNAL_DETECTED;
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PICSR, val);

	cpld_start_intr(sc);

	udelay(1000);
	}

	void cpld_start_intr(struct channel *sc)
	{
	u32 val;

	/* PIER */
	val = SBE_2T3E3_CPLD_VAL_INTERRUPT_FROM_ETHERNET_ENABLE \|
	SBE_2T3E3_CPLD_VAL_INTERRUPT_FROM_FRAMER_ENABLE;
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PIER, val);
	#if 0
	/*
	do you want to hang up your computer?
	ENABLE REST OF INTERRUPTS !!!
	you have been warned :).
	*/
	#endif
	}

	void cpld_stop_intr(struct channel *sc)
	{
	u32 val;

	/* PIER */
	val = 0;
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PIER, val);
	}

	void cpld_set_frame_mode(struct channel *sc, u32 mode)
	{
	if (sc->p.frame_mode == mode)
	return;

	switch (mode) {
	case SBE_2T3E3_FRAME_MODE_HDLC:
	cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
	SBE_2T3E3_CPLD_VAL_TRANSPARENT_MODE \|
	SBE_2T3E3_CPLD_VAL_RAW_MODE);
	exar7250_unipolar_onoff(sc, SBE_2T3E3_OFF);
	exar7300_unipolar_onoff(sc, SBE_2T3E3_OFF);
	break;
	case SBE_2T3E3_FRAME_MODE_TRANSPARENT:
	cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
	SBE_2T3E3_CPLD_VAL_RAW_MODE);
	cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
	SBE_2T3E3_CPLD_VAL_TRANSPARENT_MODE);
	exar7250_unipolar_onoff(sc, SBE_2T3E3_OFF);
	exar7300_unipolar_onoff(sc, SBE_2T3E3_OFF);
	break;
	case SBE_2T3E3_FRAME_MODE_RAW:
	cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
	SBE_2T3E3_CPLD_VAL_RAW_MODE);
	exar7250_unipolar_onoff(sc, SBE_2T3E3_ON);
	exar7300_unipolar_onoff(sc, SBE_2T3E3_ON);
	break;
	default:
	return;
	}

	sc->p.frame_mode = mode;
	}

	/* set rate of the local clock */
	void cpld_set_frame_type(struct channel *sc, u32 type)
	{
	switch (type) {
	case SBE_2T3E3_FRAME_TYPE_E3_G751:
	case SBE_2T3E3_FRAME_TYPE_E3_G832:
	cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
	SBE_2T3E3_CPLD_VAL_LOCAL_CLOCK_E3);
	break;
	case SBE_2T3E3_FRAME_TYPE_T3_CBIT:
	case SBE_2T3E3_FRAME_TYPE_T3_M13:
	cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
	SBE_2T3E3_CPLD_VAL_LOCAL_CLOCK_E3);
	break;
	default:
	return;
	}
	}

	void cpld_set_scrambler(struct channel *sc, u32 mode)
	{
	if (sc->p.scrambler == mode)
	return;

	switch (mode) {
	case SBE_2T3E3_SCRAMBLER_OFF:
	cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRB,
	SBE_2T3E3_CPLD_VAL_SCRAMBLER_ENABLE);
	break;
	case SBE_2T3E3_SCRAMBLER_LARSCOM:
	cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRB,
	SBE_2T3E3_CPLD_VAL_SCRAMBLER_TYPE);
	cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRB,
	SBE_2T3E3_CPLD_VAL_SCRAMBLER_ENABLE);
	break;
	case SBE_2T3E3_SCRAMBLER_ADC_KENTROX_DIGITAL:
	cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRB,
	SBE_2T3E3_CPLD_VAL_SCRAMBLER_TYPE);
	cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRB,
	SBE_2T3E3_CPLD_VAL_SCRAMBLER_ENABLE);
	break;
	default:
	return;
	}

	sc->p.scrambler = mode;
	}


	void cpld_set_crc(struct channel *sc, u32 crc)
	{
	if (sc->p.crc == crc)
	return;

	switch (crc) {
	case SBE_2T3E3_CRC_16:
	cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
	SBE_2T3E3_CPLD_VAL_CRC32);
	break;
	case SBE_2T3E3_CRC_32:
	cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
	SBE_2T3E3_CPLD_VAL_CRC32);
	break;
	default:
	return;
	}

	sc->p.crc = crc;
	}


	void cpld_select_panel(struct channel *sc, u32 panel)
	{
	if (sc->p.panel == panel)
	return;
	switch (panel) {
	case SBE_2T3E3_PANEL_FRONT:
	cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
	SBE_2T3E3_CPLD_VAL_REAR_PANEL);
	break;
	case SBE_2T3E3_PANEL_REAR:
	cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
	SBE_2T3E3_CPLD_VAL_REAR_PANEL);
	break;
	default:
	return;
	}

	udelay(100);

	sc->p.panel = panel;
	}


	extern void cpld_set_clock(struct channel *sc, u32 mode)
	{
	if (sc->p.clock_source == mode)
	return;

	switch (mode) {
	case SBE_2T3E3_TIMING_LOCAL:
	cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
	SBE_2T3E3_CPLD_VAL_ALT);
	break;
	case SBE_2T3E3_TIMING_LOOP:
	cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRA,
	SBE_2T3E3_CPLD_VAL_ALT);
	break;
	default:
	return;
	}

	sc->p.clock_source = mode;
	}

	void cpld_set_pad_count(struct channel *sc, u32 count)
	{
	u32 val;

	if (sc->p.pad_count == count)
	return;

	switch (count) {
	case SBE_2T3E3_PAD_COUNT_1:
	val = SBE_2T3E3_CPLD_VAL_PAD_COUNT_1;
	break;
	case SBE_2T3E3_PAD_COUNT_2:
	val = SBE_2T3E3_CPLD_VAL_PAD_COUNT_2;
	break;
	case SBE_2T3E3_PAD_COUNT_3:
	val = SBE_2T3E3_CPLD_VAL_PAD_COUNT_3;
	break;
	case SBE_2T3E3_PAD_COUNT_4:
	val = SBE_2T3E3_CPLD_VAL_PAD_COUNT_4;
	break;
	default:
	return;
	}

	cpld_clear_bit(sc, SBE_2T3E3_CPLD_REG_PCRB,
	SBE_2T3E3_CPLD_VAL_PAD_COUNT);
	cpld_set_bit(sc, SBE_2T3E3_CPLD_REG_PCRB, val);
	sc->p.pad_count = count;
	}

	void cpld_LOS_update(struct channel *sc)
	{
	u_int8_t los;

	cpld_write(sc, SBE_2T3E3_CPLD_REG_PICSR,
	SBE_2T3E3_CPLD_VAL_DMO_SIGNAL_DETECTED \|
	SBE_2T3E3_CPLD_VAL_RECEIVE_LOSS_OF_LOCK_DETECTED \|
	SBE_2T3E3_CPLD_VAL_RECEIVE_LOSS_OF_SIGNAL_DETECTED);
	los = cpld_read(sc, SBE_2T3E3_CPLD_REG_PICSR) &
	SBE_2T3E3_CPLD_VAL_RECEIVE_LOSS_OF_SIGNAL_DETECTED;

	if (los != sc->s.LOS)
	dev_info(&sc->pdev->dev, "SBE 2T3E3: LOS status: %s\n",
	los ? "Loss of signal" : "Signal OK");
	sc->s.LOS = los;
	}

	void cpld_set_fractional_mode(struct channel *sc, u32 mode,
	u32 start, u32 stop)
	{
	if (mode == SBE_2T3E3_FRACTIONAL_MODE_NONE) {
	start = 0;
	stop = 0;
	}

	if (sc->p.fractional_mode == mode && sc->p.bandwidth_start == start &&
	sc->p.bandwidth_stop == stop)
	return;

	switch (mode) {
	case SBE_2T3E3_FRACTIONAL_MODE_NONE:
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRC,
	SBE_2T3E3_CPLD_VAL_FRACTIONAL_MODE_NONE);
	break;
	case SBE_2T3E3_FRACTIONAL_MODE_0:
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRC,
	SBE_2T3E3_CPLD_VAL_FRACTIONAL_MODE_0);
	break;
	case SBE_2T3E3_FRACTIONAL_MODE_1:
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRC,
	SBE_2T3E3_CPLD_VAL_FRACTIONAL_MODE_1);
	break;
	case SBE_2T3E3_FRACTIONAL_MODE_2:
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PCRC,
	SBE_2T3E3_CPLD_VAL_FRACTIONAL_MODE_2);
	break;
	default:
	printk(KERN_ERR "wrong mode in set_fractional_mode\n");
	return;
	}

	cpld_write(sc, SBE_2T3E3_CPLD_REG_PBWF, start);
	cpld_write(sc, SBE_2T3E3_CPLD_REG_PBWL, stop);

	sc->p.fractional_mode = mode;
	sc->p.bandwidth_start = start;
	sc->p.bandwidth_stop = stop;
	}