diff options
Diffstat (limited to 'u-boot/board/esd/cpci405/flash.c')
| -rw-r--r-- | u-boot/board/esd/cpci405/flash.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/u-boot/board/esd/cpci405/flash.c b/u-boot/board/esd/cpci405/flash.c new file mode 100644 index 0000000..4b12e92 --- /dev/null +++ b/u-boot/board/esd/cpci405/flash.c @@ -0,0 +1,154 @@ +/* + * (C) Copyright 2001-2003 + * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.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 <asm/ppc4xx.h> +#include <asm/processor.h> + +/* + * include common flash code (for esd boards) + */ +#include "../common/flash.c" + +/*----------------------------------------------------------------------- + * Functions + */ +static ulong flash_get_size (vu_long * addr, flash_info_t * info); +static void flash_get_offsets (ulong base, flash_info_t * info); + +/*----------------------------------------------------------------------- + */ + +unsigned long calc_size(unsigned long size) +{ + switch (size) { + case 1 << 20: + return 0; + case 2 << 20: + return 1; + case 4 << 20: + return 2; + case 8 << 20: + return 3; + case 16 << 20: + return 4; + default: + return 0; + } +} + + +unsigned long flash_init (void) +{ + unsigned long size_b0, size_b1; + int i; + uint pbcr; + unsigned long base_b0, base_b1; + + /* Init: no FLASHes known */ + for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) { + flash_info[i].flash_id = FLASH_UNKNOWN; + } + + /* Static FLASH Bank configuration here - FIXME XXX */ + + base_b0 = FLASH_BASE0_PRELIM; + size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]); + + if (flash_info[0].flash_id == FLASH_UNKNOWN) { + printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", + size_b0, size_b0 << 20); + } + + base_b1 = FLASH_BASE1_PRELIM; + size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]); + + /* Re-do sizing to get full correct info */ + + if (size_b1) { + if (size_b1 < (1 << 20)) { + /* minimum CS size on PPC405GP is 1MB !!! */ + size_b1 = 1 << 20; + } + base_b1 = -size_b1; + mtdcr (EBC0_CFGADDR, PB0CR); + pbcr = mfdcr (EBC0_CFGDATA); + mtdcr (EBC0_CFGADDR, PB0CR); + pbcr = (pbcr & 0x0001ffff) | base_b1 | (calc_size(size_b1) << 17); + mtdcr (EBC0_CFGDATA, pbcr); +#if 0 /* test-only */ + printf("size_b1=%x base_b1=%x PB1CR = %x\n", + size_b1, base_b1, pbcr); /* test-only */ +#endif + } + + if (size_b0) { + if (size_b0 < (1 << 20)) { + /* minimum CS size on PPC405GP is 1MB !!! */ + size_b0 = 1 << 20; + } + base_b0 = base_b1 - size_b0; + mtdcr (EBC0_CFGADDR, PB1CR); + pbcr = mfdcr (EBC0_CFGDATA); + mtdcr (EBC0_CFGADDR, PB1CR); + pbcr = (pbcr & 0x0001ffff) | base_b0 | (calc_size(size_b0) << 17); + mtdcr (EBC0_CFGDATA, pbcr); +#if 0 /* test-only */ + printf("size_b0=%x base_b0=%x PB0CR = %x\n", + size_b0, base_b0, pbcr); /* test-only */ +#endif + } + + size_b0 = flash_get_size ((vu_long *) base_b0, &flash_info[0]); + + flash_get_offsets (base_b0, &flash_info[0]); + + /* monitor protection ON by default */ + flash_protect (FLAG_PROTECT_SET, + base_b0 + size_b0 - monitor_flash_len, + base_b0 + size_b0 - 1, &flash_info[0]); + + if (size_b1) { + /* Re-do sizing to get full correct info */ + size_b1 = flash_get_size ((vu_long *) base_b1, &flash_info[1]); + + flash_get_offsets (base_b1, &flash_info[1]); + + /* monitor protection ON by default */ + flash_protect (FLAG_PROTECT_SET, + base_b1 + size_b1 - monitor_flash_len, + base_b1 + size_b1 - 1, &flash_info[1]); + /* monitor protection OFF by default (one is enough) */ + flash_protect (FLAG_PROTECT_CLEAR, + base_b0 + size_b0 - monitor_flash_len, + base_b0 + size_b0 - 1, &flash_info[0]); + } else { + flash_info[1].flash_id = FLASH_UNKNOWN; + flash_info[1].sector_count = -1; + } + + flash_info[0].size = size_b0; + flash_info[1].size = size_b1; + + return (size_b0 + size_b1); +} |