board/freescale/common/pixis.c - uboot/prism - Git at Google

 /*
  * Copyright 2006 Freescale Semiconductor
  * Jeff Brown
  * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
  *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
  * 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., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */

 #include <common.h>
 #include <command.h>
 #include <watchdog.h>
 #include <asm/cache.h>
 #include <asm/io.h>

 #include "pixis.h"


 static ulong strfractoint(uchar *strptr);


 /*
  * Simple board reset.
  */
 void pixis_reset(void)
 {
 	u8 *pixis_base = (u8 *)PIXIS_BASE;
 	out_8(pixis_base + PIXIS_RST, 0);
 }


 /*
  * Per table 27, page 58 of MPC8641HPCN spec.
  */
 int set_px_sysclk(ulong sysclk)
 {
 	u8 sysclk_s, sysclk_r, sysclk_v, vclkh, vclkl, sysclk_aux;
 	u8 *pixis_base = (u8 *)PIXIS_BASE;

 	switch (sysclk) {
 	case 33:
 		sysclk_s = 0x04;
 		sysclk_r = 0x04;
 		sysclk_v = 0x07;
 		sysclk_aux = 0x00;
 		break;
 	case 40:
 		sysclk_s = 0x01;
 		sysclk_r = 0x1F;
 		sysclk_v = 0x20;
 		sysclk_aux = 0x01;
 		break;
 	case 50:
 		sysclk_s = 0x01;
 		sysclk_r = 0x1F;
 		sysclk_v = 0x2A;
 		sysclk_aux = 0x02;
 		break;
 	case 66:
 		sysclk_s = 0x01;
 		sysclk_r = 0x04;
 		sysclk_v = 0x04;
 		sysclk_aux = 0x03;
 		break;
 	case 83:
 		sysclk_s = 0x01;
 		sysclk_r = 0x1F;
 		sysclk_v = 0x4B;
 		sysclk_aux = 0x04;
 		break;
 	case 100:
 		sysclk_s = 0x01;
 		sysclk_r = 0x1F;
 		sysclk_v = 0x5C;
 		sysclk_aux = 0x05;
 		break;
 	case 134:
 		sysclk_s = 0x06;
 		sysclk_r = 0x1F;
 		sysclk_v = 0x3B;
 		sysclk_aux = 0x06;
 		break;
 	case 166:
 		sysclk_s = 0x06;
 		sysclk_r = 0x1F;
 		sysclk_v = 0x4B;
 		sysclk_aux = 0x07;
 		break;
 	default:
 		printf("Unsupported SYSCLK frequency.\n");
 		return 0;
 	}

 	vclkh = (sysclk_s << 5) | sysclk_r;
 	vclkl = sysclk_v;

 	out_8(pixis_base + PIXIS_VCLKH, vclkh);
 	out_8(pixis_base + PIXIS_VCLKL, vclkl);

 	out_8(pixis_base + PIXIS_AUX, sysclk_aux);

 	return 1;
 }


 int set_px_mpxpll(ulong mpxpll)
 {
 	u8 tmp;
 	u8 val;
 	u8 *pixis_base = (u8 *)PIXIS_BASE;

 	switch (mpxpll) {
 	case 2:
 	case 4:
 	case 6:
 	case 8:
 	case 10:
 	case 12:
 	case 14:
 	case 16:
 		val = (u8) mpxpll;
 		break;
 	default:
 		printf("Unsupported MPXPLL ratio.\n");
 		return 0;
 	}

 	tmp = in_8(pixis_base + PIXIS_VSPEED1);
 	tmp = (tmp & 0xF0) | (val & 0x0F);
 	out_8(pixis_base + PIXIS_VSPEED1, tmp);

 	return 1;
 }


 int set_px_corepll(ulong corepll)
 {
 	u8 tmp;
 	u8 val;
 	u8 *pixis_base = (u8 *)PIXIS_BASE;

 	switch ((int)corepll) {
 	case 20:
 		val = 0x08;
 		break;
 	case 25:
 		val = 0x0C;
 		break;
 	case 30:
 		val = 0x10;
 		break;
 	case 35:
 		val = 0x1C;
 		break;
 	case 40:
 		val = 0x14;
 		break;
 	case 45:
 		val = 0x0E;
 		break;
 	default:
 		printf("Unsupported COREPLL ratio.\n");
 		return 0;
 	}

 	tmp = in_8(pixis_base + PIXIS_VSPEED0);
 	tmp = (tmp & 0xE0) | (val & 0x1F);
 	out_8(pixis_base + PIXIS_VSPEED0, tmp);

 	return 1;
 }


 void read_from_px_regs(int set)
 {
 	u8 *pixis_base = (u8 *)PIXIS_BASE;
 	u8 mask = 0x1C;	/* COREPLL, MPXPLL, SYSCLK controlled by PIXIS */
 	u8 tmp = in_8(pixis_base + PIXIS_VCFGEN0);

 	if (set)
 		tmp = tmp | mask;
 	else
 		tmp = tmp & ~mask;
 	out_8(pixis_base + PIXIS_VCFGEN0, tmp);
 }


 void read_from_px_regs_altbank(int set)
 {
 	u8 *pixis_base = (u8 *)PIXIS_BASE;
 	u8 mask = 0x04;	/* FLASHBANK and FLASHMAP controlled by PIXIS */
 	u8 tmp = in_8(pixis_base + PIXIS_VCFGEN1);

 	if (set)
 		tmp = tmp | mask;
 	else
 		tmp = tmp & ~mask;
 	out_8(pixis_base + PIXIS_VCFGEN1, tmp);
 }

 #ifndef CONFIG_SYS_PIXIS_VBOOT_MASK
 #define CONFIG_SYS_PIXIS_VBOOT_MASK	(0x40)
 #endif

 void clear_altbank(void)
 {
 	u8 tmp;
 	u8 *pixis_base = (u8 *)PIXIS_BASE;

 	tmp = in_8(pixis_base + PIXIS_VBOOT);
 	tmp &= ~CONFIG_SYS_PIXIS_VBOOT_MASK;

 	out_8(pixis_base + PIXIS_VBOOT, tmp);
 }


 void set_altbank(void)
 {
 	u8 tmp;
 	u8 *pixis_base = (u8 *)PIXIS_BASE;

 	tmp = in_8(pixis_base + PIXIS_VBOOT);
 	tmp |= CONFIG_SYS_PIXIS_VBOOT_MASK;

 	out_8(pixis_base + PIXIS_VBOOT, tmp);
 }


 void set_px_go(void)
 {
 	u8 tmp;
 	u8 *pixis_base = (u8 *)PIXIS_BASE;

 	tmp = in_8(pixis_base + PIXIS_VCTL);
 	tmp = tmp & 0x1E;			/* clear GO bit */
 	out_8(pixis_base + PIXIS_VCTL, tmp);

 	tmp = in_8(pixis_base + PIXIS_VCTL);
 	tmp = tmp | 0x01;	/* set GO bit - start reset sequencer */
 	out_8(pixis_base + PIXIS_VCTL, tmp);
 }


 void set_px_go_with_watchdog(void)
 {
 	u8 tmp;
 	u8 *pixis_base = (u8 *)PIXIS_BASE;

 	tmp = in_8(pixis_base + PIXIS_VCTL);
 	tmp = tmp & 0x1E;
 	out_8(pixis_base + PIXIS_VCTL, tmp);

 	tmp = in_8(pixis_base + PIXIS_VCTL);
 	tmp = tmp | 0x09;
 	out_8(pixis_base + PIXIS_VCTL, tmp);
 }


 int pixis_disable_watchdog_cmd(cmd_tbl_t *cmdtp,
 			       int flag, int argc, char *argv[])
 {
 	u8 tmp;
 	u8 *pixis_base = (u8 *)PIXIS_BASE;

 	tmp = in_8(pixis_base + PIXIS_VCTL);
 	tmp = tmp & 0x1E;
 	out_8(pixis_base + PIXIS_VCTL, tmp);

 	/* setting VCTL[WDEN] to 0 to disable watch dog */
 	tmp = in_8(pixis_base + PIXIS_VCTL);
 	tmp &= ~0x08;
 	out_8(pixis_base + PIXIS_VCTL, tmp);

 	return 0;
 }

 U_BOOT_CMD(
 	diswd, 1, 0, pixis_disable_watchdog_cmd,
 	"Disable watchdog timer",
 	""
 );

 #ifdef CONFIG_PIXIS_SGMII_CMD
 int pixis_set_sgmii(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
 	int which_tsec = -1;
 	u8 *pixis_base = (u8 *)PIXIS_BASE;
 	uchar mask;
 	uchar switch_mask;

 	if (argc > 2)
 		if (strcmp(argv[1], "all") != 0)
 			which_tsec = simple_strtoul(argv[1], NULL, 0);

 	switch (which_tsec) {
 #ifdef CONFIG_TSEC1
 	case 1:
 		mask = PIXIS_VSPEED2_TSEC1SER;
 		switch_mask = PIXIS_VCFGEN1_TSEC1SER;
 		break;
 #endif
 #ifdef CONFIG_TSEC2
 	case 2:
 		mask = PIXIS_VSPEED2_TSEC2SER;
 		switch_mask = PIXIS_VCFGEN1_TSEC2SER;
 		break;
 #endif
 #ifdef CONFIG_TSEC3
 	case 3:
 		mask = PIXIS_VSPEED2_TSEC3SER;
 		switch_mask = PIXIS_VCFGEN1_TSEC3SER;
 		break;
 #endif
 #ifdef CONFIG_TSEC4
 	case 4:
 		mask = PIXIS_VSPEED2_TSEC4SER;
 		switch_mask = PIXIS_VCFGEN1_TSEC4SER;
 		break;
 #endif
 	default:
 		mask = PIXIS_VSPEED2_MASK;
 		switch_mask = PIXIS_VCFGEN1_MASK;
 		break;
 	}

 	/* Toggle whether the switches or FPGA control the settings */
 	if (!strcmp(argv[argc - 1], "switch"))
 		clrbits_8(pixis_base + PIXIS_VCFGEN1, switch_mask);
 	else
 		setbits_8(pixis_base + PIXIS_VCFGEN1, switch_mask);

 	/* If it's not the switches, enable or disable SGMII, as specified */
 	if (!strcmp(argv[argc - 1], "on"))
 		clrbits_8(pixis_base + PIXIS_VSPEED2, mask);
 	else if (!strcmp(argv[argc - 1], "off"))
 		setbits_8(pixis_base + PIXIS_VSPEED2, mask);

 	return 0;
 }

 U_BOOT_CMD(
 	pixis_set_sgmii, CONFIG_SYS_MAXARGS, 1, pixis_set_sgmii,
 	"pixis_set_sgmii"
 	" - Enable or disable SGMII mode for a given TSEC \n",
 	"\npixis_set_sgmii [TSEC num] <on|off|switch>\n"
 	"    TSEC num: 1,2,3,4 or 'all'.  'all' is default.\n"
 	"    on - enables SGMII\n"
 	"    off - disables SGMII\n"
 	"    switch - use switch settings"
 );
 #endif

 /*
  * This function takes the non-integral cpu:mpx pll ratio
  * and converts it to an integer that can be used to assign
  * FPGA register values.
  * input: strptr i.e. argv[2]
  */

 static ulong strfractoint(uchar *strptr)
 {
 	int i, j, retval;
 	int mulconst;
 	int intarr_len = 0, decarr_len = 0, no_dec = 0;
 	ulong intval = 0, decval = 0;
 	uchar intarr[3], decarr[3];

 	/* Assign the integer part to intarr[]
 	 * If there is no decimal point i.e.
 	 * if the ratio is an integral value
 	 * simply create the intarr.
 	 */
 	i = 0;
 	while (strptr[i] != '.') {
 		if (strptr[i] == 0) {
 			no_dec = 1;
 			break;
 		}
 		intarr[i] = strptr[i];
 		i++;
 	}

 	/* Assign length of integer part to intarr_len. */
 	intarr_len = i;
 	intarr[i] = '\0';

 	if (no_dec) {
 		/* Currently needed only for single digit corepll ratios */
 		mulconst = 10;
 		decval = 0;
 	} else {
 		j = 0;
 		i++;		/* Skipping the decimal point */
 		while ((strptr[i] >= '0') && (strptr[i] <= '9')) {
 			decarr[j] = strptr[i];
 			i++;
 			j++;
 		}

 		decarr_len = j;
 		decarr[j] = '\0';

 		mulconst = 1;
 		for (i = 0; i < decarr_len; i++)
 			mulconst *= 10;
 		decval = simple_strtoul((char *)decarr, NULL, 10);
 	}

 	intval = simple_strtoul((char *)intarr, NULL, 10);
 	intval = intval * mulconst;

 	retval = intval + decval;

 	return retval;
 }


 int
 pixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
 	unsigned int i;
 	char *p_cf = NULL;
 	char *p_cf_sysclk = NULL;
 	char *p_cf_corepll = NULL;
 	char *p_cf_mpxpll = NULL;
 	char *p_altbank = NULL;
 	char *p_wd = NULL;
 	unsigned int unknown_param = 0;

 	/*
 	 * No args is a simple reset request.
 	 */
 	if (argc <= 1) {
 		pixis_reset();
 		/* not reached */
 	}

 	for (i = 1; i < argc; i++) {
 		if (strcmp(argv[i], "cf") == 0) {
 			p_cf = argv[i];
 			if (i + 3 >= argc) {
 				break;
 			}
 			p_cf_sysclk = argv[i+1];
 			p_cf_corepll = argv[i+2];
 			p_cf_mpxpll = argv[i+3];
 			i += 3;
 			continue;
 		}

 		if (strcmp(argv[i], "altbank") == 0) {
 			p_altbank = argv[i];
 			continue;
 		}

 		if (strcmp(argv[i], "wd") == 0) {
 			p_wd = argv[i];
 			continue;
 		}

 		unknown_param = 1;
 	}

 	/*
 	 * Check that cf has all required parms
 	 */
 	if ((p_cf && !(p_cf_sysclk && p_cf_corepll && p_cf_mpxpll))
 	    ||	unknown_param) {
 #ifdef CONFIG_SYS_LONGHELP
 		puts(cmdtp->help);
 #endif
 		return 1;
 	}

 	/*
 	 * PIXIS seems to be sensitive to the ordering of
 	 * the registers that are touched.
 	 */
 	read_from_px_regs(0);

 	if (p_altbank) {
 		read_from_px_regs_altbank(0);
 	}
 	clear_altbank();

 	/*
 	 * Clock configuration specified.
 	 */
 	if (p_cf) {
 		unsigned long sysclk;
 		unsigned long corepll;
 		unsigned long mpxpll;

 		sysclk = simple_strtoul(p_cf_sysclk, NULL, 10);
 		corepll = strfractoint((uchar *) p_cf_corepll);
 		mpxpll = simple_strtoul(p_cf_mpxpll, NULL, 10);

 		if (!(set_px_sysclk(sysclk)
 		      && set_px_corepll(corepll)
 		      && set_px_mpxpll(mpxpll))) {
 #ifdef CONFIG_SYS_LONGHELP
 			puts(cmdtp->help);
 #endif
 			return 1;
 		}
 		read_from_px_regs(1);
 	}

 	/*
 	 * Altbank specified
 	 *
 	 * NOTE CHANGE IN BEHAVIOR: previous code would default
 	 * to enabling watchdog if altbank is specified.
 	 * Now the watchdog must be enabled explicitly using 'wd'.
 	 */
 	if (p_altbank) {
 		set_altbank();
 		read_from_px_regs_altbank(1);
 	}

 	/*
 	 * Reset with watchdog specified.
 	 */
 	if (p_wd) {
 		set_px_go_with_watchdog();
 	} else {
 		set_px_go();
 	}

 	/*
 	 * Shouldn't be reached.
 	 */
 	return 0;
 }


 U_BOOT_CMD(
 	pixis_reset, CONFIG_SYS_MAXARGS, 1, pixis_reset_cmd,
 	"Reset the board using the FPGA sequencer",
 	"    pixis_reset\n"
 	"    pixis_reset [altbank]\n"
 	"    pixis_reset altbank wd\n"
 	"    pixis_reset altbank cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>\n"
 	"    pixis_reset cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>"
 );
	/*
	* Copyright 2006 Freescale Semiconductor
	* Jeff Brown
	* Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
	*
	* See file CREDITS for list of people who contributed to this
	* project.
	*
	* 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., 59 Temple Place, Suite 330, Boston,
	* MA 02111-1307 USA
	*/

	#include <common.h>
	#include <command.h>
	#include <watchdog.h>
	#include <asm/cache.h>
	#include <asm/io.h>

	#include "pixis.h"


	static ulong strfractoint(uchar *strptr);


	/*
	* Simple board reset.
	*/
	void pixis_reset(void)
	{
	u8 pixis_base = (u8 )PIXIS_BASE;
	out_8(pixis_base + PIXIS_RST, 0);
	}


	/*
	* Per table 27, page 58 of MPC8641HPCN spec.
	*/
	int set_px_sysclk(ulong sysclk)
	{
	u8 sysclk_s, sysclk_r, sysclk_v, vclkh, vclkl, sysclk_aux;
	u8 pixis_base = (u8 )PIXIS_BASE;

	switch (sysclk) {
	case 33:
	sysclk_s = 0x04;
	sysclk_r = 0x04;
	sysclk_v = 0x07;
	sysclk_aux = 0x00;
	break;
	case 40:
	sysclk_s = 0x01;
	sysclk_r = 0x1F;
	sysclk_v = 0x20;
	sysclk_aux = 0x01;
	break;
	case 50:
	sysclk_s = 0x01;
	sysclk_r = 0x1F;
	sysclk_v = 0x2A;
	sysclk_aux = 0x02;
	break;
	case 66:
	sysclk_s = 0x01;
	sysclk_r = 0x04;
	sysclk_v = 0x04;
	sysclk_aux = 0x03;
	break;
	case 83:
	sysclk_s = 0x01;
	sysclk_r = 0x1F;
	sysclk_v = 0x4B;
	sysclk_aux = 0x04;
	break;
	case 100:
	sysclk_s = 0x01;
	sysclk_r = 0x1F;
	sysclk_v = 0x5C;
	sysclk_aux = 0x05;
	break;
	case 134:
	sysclk_s = 0x06;
	sysclk_r = 0x1F;
	sysclk_v = 0x3B;
	sysclk_aux = 0x06;
	break;
	case 166:
	sysclk_s = 0x06;
	sysclk_r = 0x1F;
	sysclk_v = 0x4B;
	sysclk_aux = 0x07;
	break;
	default:
	printf("Unsupported SYSCLK frequency.\n");
	return 0;
	}

	vclkh = (sysclk_s << 5) \| sysclk_r;
	vclkl = sysclk_v;

	out_8(pixis_base + PIXIS_VCLKH, vclkh);
	out_8(pixis_base + PIXIS_VCLKL, vclkl);

	out_8(pixis_base + PIXIS_AUX, sysclk_aux);

	return 1;
	}


	int set_px_mpxpll(ulong mpxpll)
	{
	u8 tmp;
	u8 val;
	u8 pixis_base = (u8 )PIXIS_BASE;

	switch (mpxpll) {
	case 2:
	case 4:
	case 6:
	case 8:
	case 10:
	case 12:
	case 14:
	case 16:
	val = (u8) mpxpll;
	break;
	default:
	printf("Unsupported MPXPLL ratio.\n");
	return 0;
	}

	tmp = in_8(pixis_base + PIXIS_VSPEED1);
	tmp = (tmp & 0xF0) \| (val & 0x0F);
	out_8(pixis_base + PIXIS_VSPEED1, tmp);

	return 1;
	}


	int set_px_corepll(ulong corepll)
	{
	u8 tmp;
	u8 val;
	u8 pixis_base = (u8 )PIXIS_BASE;

	switch ((int)corepll) {
	case 20:
	val = 0x08;
	break;
	case 25:
	val = 0x0C;
	break;
	case 30:
	val = 0x10;
	break;
	case 35:
	val = 0x1C;
	break;
	case 40:
	val = 0x14;
	break;
	case 45:
	val = 0x0E;
	break;
	default:
	printf("Unsupported COREPLL ratio.\n");
	return 0;
	}

	tmp = in_8(pixis_base + PIXIS_VSPEED0);
	tmp = (tmp & 0xE0) \| (val & 0x1F);
	out_8(pixis_base + PIXIS_VSPEED0, tmp);

	return 1;
	}


	void read_from_px_regs(int set)
	{
	u8 pixis_base = (u8 )PIXIS_BASE;
	u8 mask = 0x1C; /* COREPLL, MPXPLL, SYSCLK controlled by PIXIS */
	u8 tmp = in_8(pixis_base + PIXIS_VCFGEN0);

	if (set)
	tmp = tmp \| mask;
	else
	tmp = tmp & ~mask;
	out_8(pixis_base + PIXIS_VCFGEN0, tmp);
	}


	void read_from_px_regs_altbank(int set)
	{
	u8 pixis_base = (u8 )PIXIS_BASE;
	u8 mask = 0x04; /* FLASHBANK and FLASHMAP controlled by PIXIS */
	u8 tmp = in_8(pixis_base + PIXIS_VCFGEN1);

	if (set)
	tmp = tmp \| mask;
	else
	tmp = tmp & ~mask;
	out_8(pixis_base + PIXIS_VCFGEN1, tmp);
	}

	#ifndef CONFIG_SYS_PIXIS_VBOOT_MASK
	#define CONFIG_SYS_PIXIS_VBOOT_MASK (0x40)
	#endif

	void clear_altbank(void)
	{
	u8 tmp;
	u8 pixis_base = (u8 )PIXIS_BASE;

	tmp = in_8(pixis_base + PIXIS_VBOOT);
	tmp &= ~CONFIG_SYS_PIXIS_VBOOT_MASK;

	out_8(pixis_base + PIXIS_VBOOT, tmp);
	}


	void set_altbank(void)
	{
	u8 tmp;
	u8 pixis_base = (u8 )PIXIS_BASE;

	tmp = in_8(pixis_base + PIXIS_VBOOT);
	tmp \|= CONFIG_SYS_PIXIS_VBOOT_MASK;

	out_8(pixis_base + PIXIS_VBOOT, tmp);
	}


	void set_px_go(void)
	{
	u8 tmp;
	u8 pixis_base = (u8 )PIXIS_BASE;

	tmp = in_8(pixis_base + PIXIS_VCTL);
	tmp = tmp & 0x1E; /* clear GO bit */
	out_8(pixis_base + PIXIS_VCTL, tmp);

	tmp = in_8(pixis_base + PIXIS_VCTL);
	tmp = tmp \| 0x01; /* set GO bit - start reset sequencer */
	out_8(pixis_base + PIXIS_VCTL, tmp);
	}


	void set_px_go_with_watchdog(void)
	{
	u8 tmp;
	u8 pixis_base = (u8 )PIXIS_BASE;

	tmp = in_8(pixis_base + PIXIS_VCTL);
	tmp = tmp & 0x1E;
	out_8(pixis_base + PIXIS_VCTL, tmp);

	tmp = in_8(pixis_base + PIXIS_VCTL);
	tmp = tmp \| 0x09;
	out_8(pixis_base + PIXIS_VCTL, tmp);
	}


	int pixis_disable_watchdog_cmd(cmd_tbl_t *cmdtp,
	int flag, int argc, char *argv[])
	{
	u8 tmp;
	u8 pixis_base = (u8 )PIXIS_BASE;

	tmp = in_8(pixis_base + PIXIS_VCTL);
	tmp = tmp & 0x1E;
	out_8(pixis_base + PIXIS_VCTL, tmp);

	/* setting VCTL[WDEN] to 0 to disable watch dog */
	tmp = in_8(pixis_base + PIXIS_VCTL);
	tmp &= ~0x08;
	out_8(pixis_base + PIXIS_VCTL, tmp);

	return 0;
	}

	U_BOOT_CMD(
	diswd, 1, 0, pixis_disable_watchdog_cmd,
	"Disable watchdog timer",
	""
	);

	#ifdef CONFIG_PIXIS_SGMII_CMD
	int pixis_set_sgmii(cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	{
	int which_tsec = -1;
	u8 pixis_base = (u8 )PIXIS_BASE;
	uchar mask;
	uchar switch_mask;

	if (argc > 2)
	if (strcmp(argv[1], "all") != 0)
	which_tsec = simple_strtoul(argv[1], NULL, 0);

	switch (which_tsec) {
	#ifdef CONFIG_TSEC1
	case 1:
	mask = PIXIS_VSPEED2_TSEC1SER;
	switch_mask = PIXIS_VCFGEN1_TSEC1SER;
	break;
	#endif
	#ifdef CONFIG_TSEC2
	case 2:
	mask = PIXIS_VSPEED2_TSEC2SER;
	switch_mask = PIXIS_VCFGEN1_TSEC2SER;
	break;
	#endif
	#ifdef CONFIG_TSEC3
	case 3:
	mask = PIXIS_VSPEED2_TSEC3SER;
	switch_mask = PIXIS_VCFGEN1_TSEC3SER;
	break;
	#endif
	#ifdef CONFIG_TSEC4
	case 4:
	mask = PIXIS_VSPEED2_TSEC4SER;
	switch_mask = PIXIS_VCFGEN1_TSEC4SER;
	break;
	#endif
	default:
	mask = PIXIS_VSPEED2_MASK;
	switch_mask = PIXIS_VCFGEN1_MASK;
	break;
	}

	/* Toggle whether the switches or FPGA control the settings */
	if (!strcmp(argv[argc - 1], "switch"))
	clrbits_8(pixis_base + PIXIS_VCFGEN1, switch_mask);
	else
	setbits_8(pixis_base + PIXIS_VCFGEN1, switch_mask);

	/* If it's not the switches, enable or disable SGMII, as specified */
	if (!strcmp(argv[argc - 1], "on"))
	clrbits_8(pixis_base + PIXIS_VSPEED2, mask);
	else if (!strcmp(argv[argc - 1], "off"))
	setbits_8(pixis_base + PIXIS_VSPEED2, mask);

	return 0;
	}

	U_BOOT_CMD(
	pixis_set_sgmii, CONFIG_SYS_MAXARGS, 1, pixis_set_sgmii,
	"pixis_set_sgmii"
	" - Enable or disable SGMII mode for a given TSEC \n",
	"\npixis_set_sgmii [TSEC num] <on\|off\|switch>\n"
	" TSEC num: 1,2,3,4 or 'all'. 'all' is default.\n"
	" on - enables SGMII\n"
	" off - disables SGMII\n"
	" switch - use switch settings"
	);
	#endif

	/*
	* This function takes the non-integral cpu:mpx pll ratio
	* and converts it to an integer that can be used to assign
	* FPGA register values.
	* input: strptr i.e. argv[2]
	*/

	static ulong strfractoint(uchar *strptr)
	{
	int i, j, retval;
	int mulconst;
	int intarr_len = 0, decarr_len = 0, no_dec = 0;
	ulong intval = 0, decval = 0;
	uchar intarr[3], decarr[3];

	/* Assign the integer part to intarr[]
	* If there is no decimal point i.e.
	* if the ratio is an integral value
	* simply create the intarr.
	*/
	i = 0;
	while (strptr[i] != '.') {
	if (strptr[i] == 0) {
	no_dec = 1;
	break;
	}
	intarr[i] = strptr[i];
	i++;
	}

	/* Assign length of integer part to intarr_len. */
	intarr_len = i;
	intarr[i] = '\0';

	if (no_dec) {
	/* Currently needed only for single digit corepll ratios */
	mulconst = 10;
	decval = 0;
	} else {
	j = 0;
	i++; /* Skipping the decimal point */
	while ((strptr[i] >= '0') && (strptr[i] <= '9')) {
	decarr[j] = strptr[i];
	i++;
	j++;
	}

	decarr_len = j;
	decarr[j] = '\0';

	mulconst = 1;
	for (i = 0; i < decarr_len; i++)
	mulconst *= 10;
	decval = simple_strtoul((char *)decarr, NULL, 10);
	}

	intval = simple_strtoul((char *)intarr, NULL, 10);
	intval = intval * mulconst;

	retval = intval + decval;

	return retval;
	}


	int
	pixis_reset_cmd(cmd_tbl_t cmdtp, int flag, int argc, char argv[])
	{
	unsigned int i;
	char *p_cf = NULL;
	char *p_cf_sysclk = NULL;
	char *p_cf_corepll = NULL;
	char *p_cf_mpxpll = NULL;
	char *p_altbank = NULL;
	char *p_wd = NULL;
	unsigned int unknown_param = 0;

	/*
	* No args is a simple reset request.
	*/
	if (argc <= 1) {
	pixis_reset();
	/* not reached */
	}

	for (i = 1; i < argc; i++) {
	if (strcmp(argv[i], "cf") == 0) {
	p_cf = argv[i];
	if (i + 3 >= argc) {
	break;
	}
	p_cf_sysclk = argv[i+1];
	p_cf_corepll = argv[i+2];
	p_cf_mpxpll = argv[i+3];
	i += 3;
	continue;
	}

	if (strcmp(argv[i], "altbank") == 0) {
	p_altbank = argv[i];
	continue;
	}

	if (strcmp(argv[i], "wd") == 0) {
	p_wd = argv[i];
	continue;
	}

	unknown_param = 1;
	}

	/*
	* Check that cf has all required parms
	*/
	if ((p_cf && !(p_cf_sysclk && p_cf_corepll && p_cf_mpxpll))
	\|\| unknown_param) {
	#ifdef CONFIG_SYS_LONGHELP
	puts(cmdtp->help);
	#endif
	return 1;
	}

	/*
	* PIXIS seems to be sensitive to the ordering of
	* the registers that are touched.
	*/
	read_from_px_regs(0);

	if (p_altbank) {
	read_from_px_regs_altbank(0);
	}
	clear_altbank();

	/*
	* Clock configuration specified.
	*/
	if (p_cf) {
	unsigned long sysclk;
	unsigned long corepll;
	unsigned long mpxpll;

	sysclk = simple_strtoul(p_cf_sysclk, NULL, 10);
	corepll = strfractoint((uchar *) p_cf_corepll);
	mpxpll = simple_strtoul(p_cf_mpxpll, NULL, 10);

	if (!(set_px_sysclk(sysclk)
	&& set_px_corepll(corepll)
	&& set_px_mpxpll(mpxpll))) {
	#ifdef CONFIG_SYS_LONGHELP
	puts(cmdtp->help);
	#endif
	return 1;
	}
	read_from_px_regs(1);
	}

	/*
	* Altbank specified
	*
	* NOTE CHANGE IN BEHAVIOR: previous code would default
	* to enabling watchdog if altbank is specified.
	* Now the watchdog must be enabled explicitly using 'wd'.
	*/
	if (p_altbank) {
	set_altbank();
	read_from_px_regs_altbank(1);
	}

	/*
	* Reset with watchdog specified.
	*/
	if (p_wd) {
	set_px_go_with_watchdog();
	} else {
	set_px_go();
	}

	/*
	* Shouldn't be reached.
	*/
	return 0;
	}


	U_BOOT_CMD(
	pixis_reset, CONFIG_SYS_MAXARGS, 1, pixis_reset_cmd,
	"Reset the board using the FPGA sequencer",
	" pixis_reset\n"
	" pixis_reset [altbank]\n"
	" pixis_reset altbank wd\n"
	" pixis_reset altbank cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>\n"
	" pixis_reset cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>"
	);