Add PIXIS FPGA support for MPC8641HPCN board.
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@freescale.com>
Signed-off-by: Jon Loeliger <jdl@freescale.com>
diff --git a/board/mpc8641hpcn/pixis.c b/board/freescale/common/pixis.c
similarity index 60%
rename from board/mpc8641hpcn/pixis.c
rename to board/freescale/common/pixis.c
index 964a17c..af98157 100644
--- a/board/mpc8641hpcn/pixis.c
+++ b/board/freescale/common/pixis.c
@@ -23,14 +23,25 @@
*/
#include <common.h>
-#include <watchdog.h>
#include <command.h>
+#include <watchdog.h>
#include <asm/cache.h>
-#include <mpc86xx.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.
*/
@@ -235,7 +246,8 @@
}
-int disable_watchdog(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+int pixis_disable_watchdog_cmd(cmd_tbl_t *cmdtp,
+ int flag, int argc, char *argv[])
{
u8 tmp;
@@ -252,7 +264,7 @@
}
U_BOOT_CMD(
- diswd, 1, 0, disable_watchdog,
+ diswd, 1, 0, pixis_disable_watchdog_cmd,
"diswd - Disable watchdog timer \n",
NULL);
@@ -263,7 +275,7 @@
* input: strptr i.e. argv[2]
*/
-ulong strfractoint(uchar *strptr)
+static ulong strfractoint(uchar *strptr)
{
int i, j, retval;
int mulconst;
@@ -319,3 +331,142 @@
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"
+ );
diff --git a/board/mpc8641hpcn/pixis.h b/board/freescale/common/pixis.h
similarity index 89%
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 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 @@
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@freescale.com)
- *
- * (C) Copyright 2002 Scott McNutt <smcnutt@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 @@
#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/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 @@
#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 @@
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.