From 3d98b85800c80dc68227c8f10bf5c93456d6d054 Mon Sep 17 00:00:00 2001 From: Haiying Wang Date: Mon, 22 Jan 2007 12:37:30 -0600 Subject: [PATCH] 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 Signed-off-by: Jon Loeliger --- .../{mpc8641hpcn => freescale/common}/pixis.c | 161 +++++++++++++++++- .../{mpc8641hpcn => freescale/common}/pixis.h | 4 +- board/mpc8641hpcn/Makefile | 4 +- board/mpc8641hpcn/mpc8641hpcn.c | 113 +----------- cpu/mpc86xx/cpu.c | 8 +- doc/README.mpc8641hpcn | 34 ++++ 6 files changed, 198 insertions(+), 126 deletions(-) rename board/{mpc8641hpcn => freescale/common}/pixis.c (60%) rename board/{mpc8641hpcn => freescale/common}/pixis.h (89%) 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 964a17ca08..af98157dfd 100644 --- a/board/mpc8641hpcn/pixis.c +++ b/board/freescale/common/pixis.c @@ -23,14 +23,25 @@ */ #include -#include #include +#include #include -#include #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 @@ void set_px_go_with_watchdog(void) } -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 @@ int disable_watchdog(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) } 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 @@ U_BOOT_CMD( * 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 @@ ulong strfractoint(uchar *strptr) 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 + */ + 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 + * + */ + 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 \n" + " pixis_reset cf \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 cd9a45db87..ff62a62c74 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 4b68c36743..9625211669 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 b2cf4a9566..7d7e2afad3 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 + * Copyright 2006, 2007 Freescale Semiconductor. * * See file CREDITS for list of people who contributed to this * project. @@ -25,18 +21,18 @@ */ #include -#include #include #include #include #include +#include #if defined(CONFIG_OF_FLAT_TREE) #include 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 \n"); - puts(" reset altbank [cf ]\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 551b243076..84f5bef508 100644 --- a/cpu/mpc86xx/cpu.c +++ b/cpu/mpc86xx/cpu.c @@ -32,12 +32,6 @@ #include #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 4a650ce43c..3b88f8bc72 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 + pixis_reset cf + +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. -- 2.25.1