[U-Boot-Users] [PATCH] Add PIXIS FPGA support for MPC8641HPCN board.

Jon Loeliger jdl at freescale.com
Fri Apr 6 20:57:24 CEST 2007


Move the 8641HPCN's PIXIS code to the new directory
board/freescale/common/ as it will be shared by
future boards not in the same processor family.

Write a "pixis_reset" command that utilizes the FPGA
reset sequencer to support alternate soft-reset options
such as using the "alternate" flash bank, enabling
the watch dog, or choosing different CPU frequencies.

Add documentation for the pixis_reset to README.mpc8641hpcn.

Signed-off-by: Haiying Wang <haiying.wang at freescale.com>
Signed-off-by: Jon Loeliger <jdl at freescale.com>
---
 board/freescale/common/pixis.c                  |  472 +++++++++++++++++++++++
 board/{mpc8641hpcn => freescale/common}/pixis.h |    4 +-
 board/mpc8641hpcn/Makefile                      |    4 +-
 board/mpc8641hpcn/mpc8641hpcn.c                 |  113 +------
 board/mpc8641hpcn/pixis.c                       |  321 ---------------
 cpu/mpc86xx/cpu.c                               |    8 +-
 doc/README.mpc8641hpcn                          |   34 ++
 7 files changed, 514 insertions(+), 442 deletions(-)
 create mode 100644 board/freescale/common/pixis.c
 rename board/{mpc8641hpcn => freescale/common}/pixis.h (90%)
 delete mode 100644 board/mpc8641hpcn/pixis.c

diff --git a/board/freescale/common/pixis.c b/board/freescale/common/pixis.c
new file mode 100644
index 0000000..73a0244
--- /dev/null
+++ b/board/freescale/common/pixis.c
@@ -0,0 +1,472 @@
+/*
+ * Copyright 2006 Freescale Semiconductor
+ * Jeff Brown
+ * Srikanth Srinivasan (srikanth.srinivasan at 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 "pixis.h"
+
+
+static ulong strfractoint(uchar *strptr);
+
+
+/*
+ * Simple board reset.
+ */
+void pixis_reset(void)
+{
+    out8(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;
+
+	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;
+
+	out8(PIXIS_BASE + PIXIS_VCLKH, vclkh);
+	out8(PIXIS_BASE + PIXIS_VCLKL, vclkl);
+
+	out8(PIXIS_BASE + PIXIS_AUX, sysclk_aux);
+
+	return 1;
+}
+
+
+int set_px_mpxpll(ulong mpxpll)
+{
+	u8 tmp;
+	u8 val;
+
+	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 = in8(PIXIS_BASE + PIXIS_VSPEED1);
+	tmp = (tmp & 0xF0) | (val & 0x0F);
+	out8(PIXIS_BASE + PIXIS_VSPEED1, tmp);
+
+	return 1;
+}
+
+
+int set_px_corepll(ulong corepll)
+{
+	u8 tmp;
+	u8 val;
+
+	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 = in8(PIXIS_BASE + PIXIS_VSPEED0);
+	tmp = (tmp & 0xE0) | (val & 0x1F);
+	out8(PIXIS_BASE + PIXIS_VSPEED0, tmp);
+
+	return 1;
+}
+
+
+void read_from_px_regs(int set)
+{
+	u8 mask = 0x1C;
+	u8 tmp = in8(PIXIS_BASE + PIXIS_VCFGEN0);
+
+	if (set)
+		tmp = tmp | mask;
+	else
+		tmp = tmp & ~mask;
+	out8(PIXIS_BASE + PIXIS_VCFGEN0, tmp);
+}
+
+
+void read_from_px_regs_altbank(int set)
+{
+	u8 mask = 0x04;
+	u8 tmp = in8(PIXIS_BASE + PIXIS_VCFGEN1);
+
+	if (set)
+		tmp = tmp | mask;
+	else
+		tmp = tmp & ~mask;
+	out8(PIXIS_BASE + PIXIS_VCFGEN1, tmp);
+}
+
+
+void set_altbank(void)
+{
+	u8 tmp;
+
+	tmp = in8(PIXIS_BASE + PIXIS_VBOOT);
+	tmp ^= 0x40;
+
+	out8(PIXIS_BASE + PIXIS_VBOOT, tmp);
+}
+
+
+void set_px_go(void)
+{
+	u8 tmp;
+
+	tmp = in8(PIXIS_BASE + PIXIS_VCTL);
+	tmp = tmp & 0x1E;
+	out8(PIXIS_BASE + PIXIS_VCTL, tmp);
+
+	tmp = in8(PIXIS_BASE + PIXIS_VCTL);
+	tmp = tmp | 0x01;
+	out8(PIXIS_BASE + PIXIS_VCTL, tmp);
+}
+
+
+void set_px_go_with_watchdog(void)
+{
+	u8 tmp;
+
+	tmp = in8(PIXIS_BASE + PIXIS_VCTL);
+	tmp = tmp & 0x1E;
+	out8(PIXIS_BASE + PIXIS_VCTL, tmp);
+
+	tmp = in8(PIXIS_BASE + PIXIS_VCTL);
+	tmp = tmp | 0x09;
+	out8(PIXIS_BASE + PIXIS_VCTL, tmp);
+}
+
+
+int pixis_disable_watchdog_cmd(cmd_tbl_t *cmdtp,
+			       int flag, int argc, char *argv[])
+{
+	u8 tmp;
+
+	tmp = in8(PIXIS_BASE + PIXIS_VCTL);
+	tmp = tmp & 0x1E;
+	out8(PIXIS_BASE + PIXIS_VCTL, tmp);
+
+	/* setting VCTL[WDEN] to 0 to disable watch dog */
+	tmp = in8(PIXIS_BASE + PIXIS_VCTL);
+	tmp &= ~0x08;
+	out8(PIXIS_BASE + PIXIS_VCTL, tmp);
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	   diswd, 1, 0, pixis_disable_watchdog_cmd,
+	   "diswd	- Disable watchdog timer \n",
+	   NULL);
+
+/*
+ * 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] != 46) {
+		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] > 47) && (strptr[i] < 58)) {
+			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(decarr, NULL, 10);
+	}
+
+	intval = simple_strtoul(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[])
+{
+	ulong val;
+	ulong corepll;
+
+	/*
+	 * No args is a simple reset request.
+	 */
+	if (argc <= 1) {
+		pixis_reset();
+		/* not reached */
+	}
+
+	if (strcmp(argv[1], "cf") == 0) {
+
+		/*
+		 * Reset with frequency changed:
+		 *    cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>
+		 */
+		if (argc < 5) {
+			puts(cmdtp->usage);
+			return 1;
+		}
+
+		read_from_px_regs(0);
+
+		val = set_px_sysclk(simple_strtoul(argv[2], NULL, 10));
+
+		corepll = strfractoint(argv[3]);
+		val = val + set_px_corepll(corepll);
+		val = val + set_px_mpxpll(simple_strtoul(argv[4], NULL, 10));
+		if (val == 3) {
+			puts("Setting registers VCFGEN0 and VCTL\n");
+			read_from_px_regs(1);
+			puts("Resetting board with values from ");
+			puts("VSPEED0, VSPEED1, VCLKH, and VCLKL \n");
+			set_px_go();
+		} else {
+			puts(cmdtp->usage);
+			return 1;
+		}
+
+		while (1) ;	/* Not reached */
+
+	} else if (strcmp(argv[1], "altbank") == 0) {
+
+		/*
+		 * Reset using alternate flash bank:
+		 */
+		if (argv[2] == 0) {
+			/*
+			 * Reset from alternate bank without changing
+			 * frequency and without watchdog timer enabled.
+			 *	altbank
+			 */
+			read_from_px_regs(0);
+			read_from_px_regs_altbank(0);
+			if (argc > 2) {
+				puts(cmdtp->usage);
+				return 1;
+			}
+			puts("Setting registers VCFGNE1, VBOOT, and VCTL\n");
+			set_altbank();
+			read_from_px_regs_altbank(1);
+			puts("Resetting board to boot from the other bank.\n");
+			set_px_go();
+
+		} else if (strcmp(argv[2], "cf") == 0) {
+			/*
+			 * Reset with frequency changed
+			 *    altbank cf <SYSCLK freq> <COREPLL ratio>
+			 *				<MPXPLL ratio>
+			 */
+			read_from_px_regs(0);
+			read_from_px_regs_altbank(0);
+			val = set_px_sysclk(simple_strtoul(argv[3], NULL, 10));
+			corepll = strfractoint(argv[4]);
+			val = val + set_px_corepll(corepll);
+			val = val + set_px_mpxpll(simple_strtoul(argv[5],
+								 NULL, 10));
+			if (val == 3) {
+				puts("Setting registers VCFGEN0, VCFGEN1, VBOOT, and VCTL\n");
+				set_altbank();
+				read_from_px_regs(1);
+				read_from_px_regs_altbank(1);
+				puts("Enabling watchdog timer on the FPGA\n");
+				puts("Resetting board with values from ");
+				puts("VSPEED0, VSPEED1, VCLKH and VCLKL ");
+				puts("to boot from the other bank.\n");
+				set_px_go_with_watchdog();
+			} else {
+				puts(cmdtp->usage);
+				return 1;
+			}
+
+			while (1) ;	/* Not reached */
+
+		} else if (strcmp(argv[2], "wd") == 0) {
+			/*
+			 * Reset from alternate bank without changing
+			 * frequencies but with watchdog timer enabled:
+			 *    altbank wd
+			 */
+			read_from_px_regs(0);
+			read_from_px_regs_altbank(0);
+			puts("Setting registers VCFGEN1, VBOOT, and VCTL\n");
+			set_altbank();
+			read_from_px_regs_altbank(1);
+			puts("Enabling watchdog timer on the FPGA\n");
+			puts("Resetting board to boot from the other bank.\n");
+			set_px_go_with_watchdog();
+			while (1) ;	/* Not reached */
+
+		} else {
+			puts(cmdtp->usage);
+			return 1;
+		}
+
+	} else {
+		puts(cmdtp->usage);
+		return 1;
+	}
+
+	return 0;
+}
+
+
+U_BOOT_CMD(
+	pixis_reset, CFG_MAXARGS, 1, pixis_reset_cmd,
+	"pixis_reset - Reset the board using the FPGA sequencer\n"
+	"    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>\n"
+	NULL);
diff --git a/board/mpc8641hpcn/pixis.h b/board/freescale/common/pixis.h
similarity index 90%
rename from board/mpc8641hpcn/pixis.h
rename to board/freescale/common/pixis.h
index cd9a45d..ff62a62 100644
--- a/board/mpc8641hpcn/pixis.h
+++ b/board/freescale/common/pixis.h
@@ -20,6 +20,7 @@
  * MA 02111-1307 USA
  */
 
+extern void pixis_reset(void);
 extern int set_px_sysclk(ulong sysclk);
 extern int set_px_mpxpll(ulong mpxpll);
 extern int set_px_corepll(ulong corepll);
@@ -28,6 +29,3 @@ extern void read_from_px_regs_altbank(int set);
 extern void set_altbank(void);
 extern void set_px_go(void);
 extern void set_px_go_with_watchdog(void);
-extern int disable_watchdog(cmd_tbl_t *cmdtp,
-			    int flag, int argc, char *argv[]);
-extern ulong strfractoint(uchar *strptr);
diff --git a/board/mpc8641hpcn/Makefile b/board/mpc8641hpcn/Makefile
index 4b68c36..9625211 100644
--- a/board/mpc8641hpcn/Makefile
+++ b/board/mpc8641hpcn/Makefile
@@ -25,7 +25,9 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	:= $(BOARD).o pixis.o sys_eeprom.o
+COBJS	:= $(BOARD).o sys_eeprom.o \
+		../freescale/common/pixis.o
+
 SOBJS	:= init.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
diff --git a/board/mpc8641hpcn/mpc8641hpcn.c b/board/mpc8641hpcn/mpc8641hpcn.c
index b2cf4a9..7d7e2af 100644
--- a/board/mpc8641hpcn/mpc8641hpcn.c
+++ b/board/mpc8641hpcn/mpc8641hpcn.c
@@ -1,9 +1,5 @@
 /*
- * Copyright 2004 Freescale Semiconductor.
- * Jeff Brown
- * Srikanth Srinivasan (srikanth.srinivasan at freescale.com)
- *
- * (C) Copyright 2002 Scott McNutt <smcnutt at artesyncp.com>
+ * Copyright 2006, 2007 Freescale Semiconductor.
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -25,18 +21,18 @@
  */
 
 #include <common.h>
-#include <command.h>
 #include <pci.h>
 #include <asm/processor.h>
 #include <asm/immap_86xx.h>
 #include <spd.h>
+#include <asm/io.h>
 
 #if defined(CONFIG_OF_FLAT_TREE)
 #include <ft_build.h>
 extern void ft_cpu_setup(void *blob, bd_t *bd);
 #endif
 
-#include "pixis.h"
+#include "../freescale/common/pixis.h"
 
 #if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
 extern void ddr_enable_ecc(unsigned int dram_size);
@@ -258,109 +254,6 @@ ft_board_setup(void *blob, bd_t *bd)
 #endif
 
 
-void
-mpc8641_reset_board(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
-{
-	char cmd;
-	ulong val;
-	ulong corepll;
-
-	/*
-	 * No args is a simple reset request.
-	 */
-	if (argc <= 1) {
-		out8(PIXIS_BASE + PIXIS_RST, 0);
-		/* not reached */
-	}
-
-	cmd = argv[1][1];
-	switch (cmd) {
-	case 'f':		/* reset with frequency changed */
-		if (argc < 5)
-			goto my_usage;
-		read_from_px_regs(0);
-
-		val = set_px_sysclk(simple_strtoul(argv[2], NULL, 10));
-
-		corepll = strfractoint(argv[3]);
-		val = val + set_px_corepll(corepll);
-		val = val + set_px_mpxpll(simple_strtoul(argv[4], NULL, 10));
-		if (val == 3) {
-			puts("Setting registers VCFGEN0 and VCTL\n");
-			read_from_px_regs(1);
-			puts("Resetting board with values from VSPEED0, VSPEED1, VCLKH, and VCLKL ....\n");
-			set_px_go();
-		} else
-			goto my_usage;
-
-		while (1) ;	/* Not reached */
-
-	case 'l':
-		if (argv[2][1] == 'f') {
-			read_from_px_regs(0);
-			read_from_px_regs_altbank(0);
-			/* reset with frequency changed */
-			val = set_px_sysclk(simple_strtoul(argv[3], NULL, 10));
-
-			corepll = strfractoint(argv[4]);
-			val = val + set_px_corepll(corepll);
-			val = val + set_px_mpxpll(simple_strtoul(argv[5],
-								 NULL, 10));
-			if (val == 3) {
-				puts("Setting registers VCFGEN0, VCFGEN1, VBOOT, and VCTL\n");
-				set_altbank();
-				read_from_px_regs(1);
-				read_from_px_regs_altbank(1);
-				puts("Enabling watchdog timer on the FPGA and resetting board with values from VSPEED0, VSPEED1, VCLKH, and VCLKL to boot from the other bank ....\n");
-				set_px_go_with_watchdog();
-			} else
-				goto my_usage;
-
-			while (1) ;	/* Not reached */
-
-		} else if (argv[2][1] == 'd') {
-			/*
-			 * Reset from alternate bank without changing
-			 * frequencies but with watchdog timer enabled.
-			 */
-			read_from_px_regs(0);
-			read_from_px_regs_altbank(0);
-			puts("Setting registers VCFGEN1, VBOOT, and VCTL\n");
-			set_altbank();
-			read_from_px_regs_altbank(1);
-			puts("Enabling watchdog timer on the FPGA and resetting board to boot from the other bank....\n");
-			set_px_go_with_watchdog();
-			while (1) ;	/* Not reached */
-
-		} else {
-			/*
-			 * Reset from next bank without changing
-			 * frequency and without watchdog timer enabled.
-			 */
-			read_from_px_regs(0);
-			read_from_px_regs_altbank(0);
-			if (argc > 2)
-				goto my_usage;
-			puts("Setting registers VCFGNE1, VBOOT, and VCTL\n");
-			set_altbank();
-			read_from_px_regs_altbank(1);
-			puts("Resetting board to boot from the other bank....\n");
-			set_px_go();
-		}
-
-	default:
-		goto my_usage;
-	}
-
-my_usage:
-	puts("\nUsage: reset cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>\n");
-	puts("       reset altbank [cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>]\n");
-	puts("       reset altbank [wd]\n");
-	puts("For example:   reset cf 40 2.5 10\n");
-	puts("See MPC8641HPCN Design Workbook for valid values of command line parameters.\n");
-}
-
-
 /*
  * get_board_sys_clk
  *      Reads the FPGA on board for CONFIG_SYS_CLK_FREQ
diff --git a/board/mpc8641hpcn/pixis.c b/board/mpc8641hpcn/pixis.c
deleted file mode 100644
index 964a17c..0000000
--- a/board/mpc8641hpcn/pixis.c
+++ /dev/null
@@ -1,321 +0,0 @@
-/*
- * Copyright 2006 Freescale Semiconductor
- * Jeff Brown
- * Srikanth Srinivasan (srikanth.srinivasan at 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 <watchdog.h>
-#include <command.h>
-#include <asm/cache.h>
-#include <mpc86xx.h>
-
-#include "pixis.h"
-
-
-/*
- * 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;
-
-	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;
-
-	out8(PIXIS_BASE + PIXIS_VCLKH, vclkh);
-	out8(PIXIS_BASE + PIXIS_VCLKL, vclkl);
-
-	out8(PIXIS_BASE + PIXIS_AUX, sysclk_aux);
-
-	return 1;
-}
-
-
-int set_px_mpxpll(ulong mpxpll)
-{
-	u8 tmp;
-	u8 val;
-
-	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 = in8(PIXIS_BASE + PIXIS_VSPEED1);
-	tmp = (tmp & 0xF0) | (val & 0x0F);
-	out8(PIXIS_BASE + PIXIS_VSPEED1, tmp);
-
-	return 1;
-}
-
-
-int set_px_corepll(ulong corepll)
-{
-	u8 tmp;
-	u8 val;
-
-	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 = in8(PIXIS_BASE + PIXIS_VSPEED0);
-	tmp = (tmp & 0xE0) | (val & 0x1F);
-	out8(PIXIS_BASE + PIXIS_VSPEED0, tmp);
-
-	return 1;
-}
-
-
-void read_from_px_regs(int set)
-{
-	u8 mask = 0x1C;
-	u8 tmp = in8(PIXIS_BASE + PIXIS_VCFGEN0);
-
-	if (set)
-		tmp = tmp | mask;
-	else
-		tmp = tmp & ~mask;
-	out8(PIXIS_BASE + PIXIS_VCFGEN0, tmp);
-}
-
-
-void read_from_px_regs_altbank(int set)
-{
-	u8 mask = 0x04;
-	u8 tmp = in8(PIXIS_BASE + PIXIS_VCFGEN1);
-
-	if (set)
-		tmp = tmp | mask;
-	else
-		tmp = tmp & ~mask;
-	out8(PIXIS_BASE + PIXIS_VCFGEN1, tmp);
-}
-
-
-void set_altbank(void)
-{
-	u8 tmp;
-
-	tmp = in8(PIXIS_BASE + PIXIS_VBOOT);
-	tmp ^= 0x40;
-
-	out8(PIXIS_BASE + PIXIS_VBOOT, tmp);
-}
-
-
-void set_px_go(void)
-{
-	u8 tmp;
-
-	tmp = in8(PIXIS_BASE + PIXIS_VCTL);
-	tmp = tmp & 0x1E;
-	out8(PIXIS_BASE + PIXIS_VCTL, tmp);
-
-	tmp = in8(PIXIS_BASE + PIXIS_VCTL);
-	tmp = tmp | 0x01;
-	out8(PIXIS_BASE + PIXIS_VCTL, tmp);
-}
-
-
-void set_px_go_with_watchdog(void)
-{
-	u8 tmp;
-
-	tmp = in8(PIXIS_BASE + PIXIS_VCTL);
-	tmp = tmp & 0x1E;
-	out8(PIXIS_BASE + PIXIS_VCTL, tmp);
-
-	tmp = in8(PIXIS_BASE + PIXIS_VCTL);
-	tmp = tmp | 0x09;
-	out8(PIXIS_BASE + PIXIS_VCTL, tmp);
-}
-
-
-int disable_watchdog(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
-{
-	u8 tmp;
-
-	tmp = in8(PIXIS_BASE + PIXIS_VCTL);
-	tmp = tmp & 0x1E;
-	out8(PIXIS_BASE + PIXIS_VCTL, tmp);
-
-	/* setting VCTL[WDEN] to 0 to disable watch dog */
-	tmp = in8(PIXIS_BASE + PIXIS_VCTL);
-	tmp &= ~0x08;
-	out8(PIXIS_BASE + PIXIS_VCTL, tmp);
-
-	return 0;
-}
-
-U_BOOT_CMD(
-	   diswd, 1, 0, disable_watchdog,
-	   "diswd	- Disable watchdog timer \n",
-	   NULL);
-
-/*
- * 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]
- */
-
-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] != 46) {
-		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] > 47) && (strptr[i] < 58)) {
-			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(decarr, NULL, 10);
-	}
-
-	intval = simple_strtoul(intarr, NULL, 10);
-	intval = intval * mulconst;
-
-	retval = intval + decval;
-
-	return retval;
-}
diff --git a/cpu/mpc86xx/cpu.c b/cpu/mpc86xx/cpu.c
index 551b243..84f5bef 100644
--- a/cpu/mpc86xx/cpu.c
+++ b/cpu/mpc86xx/cpu.c
@@ -32,12 +32,6 @@
 #include <ft_build.h>
 #endif
 
-#ifdef CONFIG_MPC8641HPCN
-extern void mpc8641_reset_board(cmd_tbl_t *cmdtp, int flag,
-				int argc, char *argv[]);
-#endif
-
-
 int
 checkcpu(void)
 {
@@ -185,7 +179,7 @@ do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 
 #else /* CONFIG_MPC8641HPCN */
 
-	mpc8641_reset_board(cmdtp, flag, argc, argv);
+	out8(PIXIS_BASE + PIXIS_RST, 0);
 
 #endif /* !CONFIG_MPC8641HPCN */
 
diff --git a/doc/README.mpc8641hpcn b/doc/README.mpc8641hpcn
index 4a650ce..3b88f8b 100644
--- a/doc/README.mpc8641hpcn
+++ b/doc/README.mpc8641hpcn
@@ -121,3 +121,37 @@ To Flash U-boot into the alternative bank (0xFF800000 - 0xFFBFFFFF):
 	0xe300_0000	0xe3ff_ffff	PCI2/PEX2 IO	16M
 	0xfe00_0000	0xfeff_ffff	Flash(alternate)16M
 	0xff00_0000	0xffff_ffff	Flash(boot bank)16M
+
+5. pixis_reset command
+--------------------
+A new command, "pixis_reset", is introduced to reset mpc8641hpcn board
+using the FPGA sequencer.  When the board restarts, it has the option
+of using either the current or alternate flash bank as the boot
+image, with or without the watchdog timer enabled, and finally with
+or without frequency changes.
+
+Usage is;
+
+	pixis_reset
+	pixis_reset altbank
+	pixis_reset altbank wd
+	pixis_reset altbank cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>
+	pixis_reset cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>
+
+Examples;
+
+	/* reset to current bank, like "reset" command */
+	pixis_reset
+
+	/* reset board but use the to alternate flash bank */
+	pixis_reset altbank
+
+	/* reset board, use alternate flash bank with watchdog timer enabled*/
+	pixis_reset altbank wd
+
+	/* reset board to alternate bank with frequency changed.
+	 * 40 is SYSCLK, 2.5 is COREPLL ratio, 10 is MPXPLL ratio
+	 */
+	pixis-reset altbank cf 40 2.5 10
+
+Valid clock choices are in the 8641 Reference Manuals.
-- 
1.5.0.3







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