diff options
Diffstat (limited to 'board/netta2/flash.c')
| -rwxr-xr-x | board/netta2/flash.c | 506 |
1 files changed, 506 insertions, 0 deletions
diff --git a/board/netta2/flash.c b/board/netta2/flash.c new file mode 100755 index 0000000..a1c87f5 --- /dev/null +++ b/board/netta2/flash.c @@ -0,0 +1,506 @@ +/* + * (C) Copyright 2000-2004 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * 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 <mpc8xx.h> + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ + +/*----------------------------------------------------------------------- + * Functions + */ +static ulong flash_get_size(vu_long * addr, flash_info_t * info); +static int write_byte(flash_info_t * info, ulong dest, uchar data); +static void flash_get_offsets(ulong base, flash_info_t * info); + +/*----------------------------------------------------------------------- + */ + +unsigned long flash_init(void) +{ + volatile immap_t *immap = (immap_t *) CFG_IMMR; + volatile memctl8xx_t *memctl = &immap->im_memctl; + unsigned long size; + int i; + + /* Init: no FLASHes known */ + for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) + flash_info[i].flash_id = FLASH_UNKNOWN; + + size = flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]); + + if (flash_info[0].flash_id == FLASH_UNKNOWN) { + printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", + size, size << 20); + } + + /* Remap FLASH according to real size */ + memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000); + memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK)); + + /* Re-do sizing to get full correct info */ + size = flash_get_size((vu_long *) CFG_FLASH_BASE, &flash_info[0]); + + flash_get_offsets(CFG_FLASH_BASE, &flash_info[0]); + + /* monitor protection ON by default */ + flash_protect(FLAG_PROTECT_SET, + CFG_FLASH_BASE, CFG_FLASH_BASE + monitor_flash_len - 1, + &flash_info[0]); + + flash_protect ( FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SIZE - 1, + &flash_info[0]); + +#ifdef CFG_ENV_ADDR_REDUND + flash_protect ( FLAG_PROTECT_SET, + CFG_ENV_ADDR_REDUND, + CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1, + &flash_info[0]); +#endif + + flash_info[0].size = size; + + return (size); +} + +/*----------------------------------------------------------------------- + */ +static void flash_get_offsets(ulong base, flash_info_t * info) +{ + int i; + + /* set up sector start address table */ + if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) { + for (i = 0; i < info->sector_count; i++) { + info->start[i] = base + (i * 0x00010000); + } + } else if (info->flash_id & FLASH_BTYPE) { + /* set sector offsets for bottom boot block type */ + info->start[0] = base + 0x00000000; + info->start[1] = base + 0x00004000; + info->start[2] = base + 0x00006000; + info->start[3] = base + 0x00008000; + for (i = 4; i < info->sector_count; i++) { + info->start[i] = base + (i * 0x00010000) - 0x00030000; + } + } else { + /* set sector offsets for top boot block type */ + i = info->sector_count - 1; + info->start[i--] = base + info->size - 0x00004000; + info->start[i--] = base + info->size - 0x00006000; + info->start[i--] = base + info->size - 0x00008000; + for (; i >= 0; i--) { + info->start[i] = base + i * 0x00010000; + } + } +} + +/*----------------------------------------------------------------------- + */ +void flash_print_info(flash_info_t * info) +{ + int i; + + if (info->flash_id == FLASH_UNKNOWN) { + printf("missing or unknown FLASH type\n"); + return; + } + + switch (info->flash_id & FLASH_VENDMASK) { + case FLASH_MAN_AMD: + printf("AMD "); + break; + case FLASH_MAN_FUJ: + printf("FUJITSU "); + break; + case FLASH_MAN_MX: + printf("MXIC "); + break; + default: + printf("Unknown Vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AM040: + printf("AM29LV040B (4 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM400B: + printf("AM29LV400B (4 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM400T: + printf("AM29LV400T (4 Mbit, top boot sector)\n"); + break; + case FLASH_AM800B: + printf("AM29LV800B (8 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM800T: + printf("AM29LV800T (8 Mbit, top boot sector)\n"); + break; + case FLASH_AM160B: + printf("AM29LV160B (16 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM160T: + printf("AM29LV160T (16 Mbit, top boot sector)\n"); + break; + case FLASH_AM320B: + printf("AM29LV320B (32 Mbit, bottom boot sect)\n"); + break; + case FLASH_AM320T: + printf("AM29LV320T (32 Mbit, top boot sector)\n"); + break; + default: + printf("Unknown Chip Type\n"); + break; + } + + printf(" Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count); + + printf(" Sector Start Addresses:"); + for (i = 0; i < info->sector_count; ++i) { + if ((i % 5) == 0) + printf("\n "); + printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : " "); + } + printf("\n"); +} + +/*----------------------------------------------------------------------- + */ + + +/*----------------------------------------------------------------------- + */ + +/* + * The following code cannot be run from FLASH! + */ + +static ulong flash_get_size(vu_long * addr, flash_info_t * info) +{ + short i; + uchar mid; + uchar pid; + vu_char *caddr = (vu_char *) addr; + ulong base = (ulong) addr; + + /* Write auto select command: read Manufacturer ID */ + caddr[0x0555] = 0xAA; + caddr[0x02AA] = 0x55; + caddr[0x0555] = 0x90; + + mid = caddr[0]; + switch (mid) { + case (AMD_MANUFACT & 0xFF): + info->flash_id = FLASH_MAN_AMD; + break; + case (FUJ_MANUFACT & 0xFF): + info->flash_id = FLASH_MAN_FUJ; + break; + case (MX_MANUFACT & 0xFF): + info->flash_id = FLASH_MAN_MX; + break; + case (STM_MANUFACT & 0xFF): + info->flash_id = FLASH_MAN_STM; + break; + default: + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + return (0); /* no or unknown flash */ + } + + pid = caddr[1]; /* device ID */ + switch (pid) { + case (AMD_ID_LV400T & 0xFF): + info->flash_id += FLASH_AM400T; + info->sector_count = 11; + info->size = 0x00080000; + break; /* => 512 kB */ + + case (AMD_ID_LV400B & 0xFF): + info->flash_id += FLASH_AM400B; + info->sector_count = 11; + info->size = 0x00080000; + break; /* => 512 kB */ + + case (AMD_ID_LV800T & 0xFF): + info->flash_id += FLASH_AM800T; + info->sector_count = 19; + info->size = 0x00100000; + break; /* => 1 MB */ + + case (AMD_ID_LV800B & 0xFF): + info->flash_id += FLASH_AM800B; + info->sector_count = 19; + info->size = 0x00100000; + break; /* => 1 MB */ + + case (AMD_ID_LV160T & 0xFF): + info->flash_id += FLASH_AM160T; + info->sector_count = 35; + info->size = 0x00200000; + break; /* => 2 MB */ + + case (AMD_ID_LV160B & 0xFF): + info->flash_id += FLASH_AM160B; + info->sector_count = 35; + info->size = 0x00200000; + break; /* => 2 MB */ + + case (AMD_ID_LV040B & 0xFF): + info->flash_id += FLASH_AM040; + info->sector_count = 8; + info->size = 0x00080000; + break; + + case (STM_ID_M29W040B & 0xFF): + info->flash_id += FLASH_AM040; + info->sector_count = 8; + info->size = 0x00080000; + break; + +#if 0 /* enable when device IDs are available */ + case (AMD_ID_LV320T & 0xFF): + info->flash_id += FLASH_AM320T; + info->sector_count = 67; + info->size = 0x00400000; + break; /* => 4 MB */ + + case (AMD_ID_LV320B & 0xFF): + info->flash_id += FLASH_AM320B; + info->sector_count = 67; + info->size = 0x00400000; + break; /* => 4 MB */ +#endif + default: + info->flash_id = FLASH_UNKNOWN; + return (0); /* => no or unknown flash */ + + } + + printf(" "); + /* set up sector start address table */ + if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) { + for (i = 0; i < info->sector_count; i++) { + info->start[i] = base + (i * 0x00010000); + } + } else if (info->flash_id & FLASH_BTYPE) { + /* set sector offsets for bottom boot block type */ + info->start[0] = base + 0x00000000; + info->start[1] = base + 0x00004000; + info->start[2] = base + 0x00006000; + info->start[3] = base + 0x00008000; + for (i = 4; i < info->sector_count; i++) { + info->start[i] = base + (i * 0x00010000) - 0x00030000; + } + } else { + /* set sector offsets for top boot block type */ + i = info->sector_count - 1; + info->start[i--] = base + info->size - 0x00004000; + info->start[i--] = base + info->size - 0x00006000; + info->start[i--] = base + info->size - 0x00008000; + for (; i >= 0; i--) { + info->start[i] = base + i * 0x00010000; + } + } + + /* check for protected sectors */ + for (i = 0; i < info->sector_count; i++) { + /* read sector protection: D0 = 1 if protected */ + caddr = (volatile unsigned char *)(info->start[i]); + info->protect[i] = caddr[2] & 1; + } + + /* + * Prevent writes to uninitialized FLASH. + */ + if (info->flash_id != FLASH_UNKNOWN) { + caddr = (vu_char *) info->start[0]; + + caddr[0x0555] = 0xAA; + caddr[0x02AA] = 0x55; + caddr[0x0555] = 0xF0; + + udelay(20000); + } + + return (info->size); +} + + +/*----------------------------------------------------------------------- + */ + +int flash_erase(flash_info_t * info, int s_first, int s_last) +{ + vu_char *addr = (vu_char *) (info->start[0]); + int flag, prot, sect, l_sect; + ulong start, now, last; + + if ((s_first < 0) || (s_first > s_last)) { + if (info->flash_id == FLASH_UNKNOWN) { + printf("- missing\n"); + } else { + printf("- no sectors to erase\n"); + } + return 1; + } + + if ((info->flash_id == FLASH_UNKNOWN) || + (info->flash_id > FLASH_AMD_COMP)) { + printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id); + return 1; + } + + prot = 0; + for (sect = s_first; sect <= s_last; ++sect) { + if (info->protect[sect]) { + prot++; + } + } + + if (prot) { + printf("- Warning: %d protected sectors will not be erased!\n", prot); + } else { + printf("\n"); + } + + l_sect = -1; + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + addr[0x0555] = 0xAA; + addr[0x02AA] = 0x55; + addr[0x0555] = 0x80; + addr[0x0555] = 0xAA; + addr[0x02AA] = 0x55; + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect <= s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + addr = (vu_char *) (info->start[sect]); + addr[0] = 0x30; + l_sect = sect; + } + } + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + /* wait at least 80us - let's wait 1 ms */ + udelay(1000); + + /* + * We wait for the last triggered sector + */ + if (l_sect < 0) + goto DONE; + + start = get_timer(0); + last = start; + addr = (vu_char *) (info->start[l_sect]); + while ((addr[0] & 0x80) != 0x80) { + if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) { + printf("Timeout\n"); + return 1; + } + /* show that we're waiting */ + if ((now - last) > 1000) { /* every second */ + putc('.'); + last = now; + } + } + +DONE: + /* reset to read mode */ + addr = (vu_char *) info->start[0]; + addr[0] = 0xF0; /* reset bank */ + + printf(" done\n"); + return 0; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ + +int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt) +{ + int rc; + + while (cnt > 0) { + if ((rc = write_byte(info, addr++, *src++)) != 0) { + return (rc); + } + --cnt; + } + + return (0); +} + +/*----------------------------------------------------------------------- + * Write a word to Flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ +static int write_byte(flash_info_t * info, ulong dest, uchar data) +{ + vu_char *addr = (vu_char *) (info->start[0]); + ulong start; + int flag; + + /* Check if Flash is (sufficiently) erased */ + if ((*((vu_char *) dest) & data) != data) { + return (2); + } + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + addr[0x0555] = 0xAA; + addr[0x02AA] = 0x55; + addr[0x0555] = 0xA0; + + *((vu_char *) dest) = data; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + /* data polling for D7 */ + start = get_timer(0); + while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) { + if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { + return (1); + } + } + return (0); +} |