diff options
Diffstat (limited to 'board/ip860/flash.c')
| -rw-r--r-- | board/ip860/flash.c | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/board/ip860/flash.c b/board/ip860/flash.c new file mode 100644 index 000000000..4b0ea9bb0 --- /dev/null +++ b/board/ip860/flash.c @@ -0,0 +1,456 @@ +/* + * (C) Copyright 2000 + * 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 */ + +#if defined(CFG_ENV_IS_IN_FLASH) +# ifndef CFG_ENV_ADDR +# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET) +# endif +# ifndef CFG_ENV_SIZE +# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE +# endif +# ifndef CFG_ENV_SECT_SIZE +# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE +# endif +#endif + +/*----------------------------------------------------------------------- + * Functions + */ +static ulong flash_get_size (vu_long *addr, flash_info_t *info); +static int write_word (flash_info_t *info, ulong dest, ulong 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; + volatile ip860_bcsr_t *bcsr = (ip860_bcsr_t *)BCSR_BASE; + unsigned long size; + int i; + + /* Init: enable write, + * or we cannot even write flash commands + */ + bcsr->bd_ctrl |= BD_CTRL_FLWE; + + for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { + flash_info[i].flash_id = FLASH_UNKNOWN; + } + + /* Static FLASH Bank configuration here - FIXME XXX */ + + size = flash_get_size((vu_long *)FLASH_BASE, &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_or1 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000); + memctl->memc_br1 = (CFG_FLASH_BASE & BR_BA_MSK) | + (memctl->memc_br1 & ~(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]); + + flash_info[0].size = size; + +#if CFG_MONITOR_BASE >= CFG_FLASH_BASE + /* monitor protection ON by default */ + flash_protect(FLAG_PROTECT_SET, + CFG_MONITOR_BASE, + CFG_MONITOR_BASE+CFG_MONITOR_LEN-1, + &flash_info[0]); +#endif + +#ifdef CFG_ENV_IS_IN_FLASH + /* ENV protection ON by default */ + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1, + &flash_info[0]); +#endif + return (size); +} + +/*----------------------------------------------------------------------- + */ +static void flash_get_offsets (ulong base, flash_info_t *info) +{ + int i; + + /* all possible flash types + * (28F016SV, 28F160S3, 28F320S3) + * have the same erase block size: 64 kB per chip, + * of 128 kB per bank + */ + + /* set up sector start address table */ + for (i = 0; i < info->sector_count; i++) { + info->start[i] = base; + base += 0x00020000; + } +} + +/*----------------------------------------------------------------------- + */ +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_INTEL: printf ("Intel "); break; + default: printf ("Unknown Vendor "); break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_28F016SV: printf ("28F016SV (16 Mbit, 32 x 64k)\n"); + break; + case FLASH_28F160S3: printf ("28F160S3 (16 Mbit, 32 x 512K)\n"); + break; + case FLASH_28F320S3: printf ("28F320S3 (32 Mbit, 64 x 512K)\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"); + return; +} + +/*----------------------------------------------------------------------- + */ + + +/*----------------------------------------------------------------------- + */ + +/* + * The following code cannot be run from FLASH! + */ + +static ulong flash_get_size (vu_long *addr, flash_info_t *info) +{ + short i; + ulong value; + ulong base = (ulong)addr; + + /* Write "Intelligent Identifier" command: read Manufacturer ID */ + *addr = 0x90909090; + + value = addr[0]; + switch (value) { + case (MT_MANUFACT & 0x00FF00FF): /* MT or => Intel */ + case (INTEL_ALT_MANU & 0x00FF00FF): + info->flash_id = FLASH_MAN_INTEL; + break; + default: + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + return (0); /* no or unknown flash */ + } + + value = addr[1]; /* device ID */ + + switch (value) { + case (INTEL_ID_28F016S): + info->flash_id += FLASH_28F016SV; + info->sector_count = 32; + info->size = 0x00400000; + break; /* => 2x2 MB */ + + case (INTEL_ID_28F160S3): + info->flash_id += FLASH_28F160S3; + info->sector_count = 32; + info->size = 0x00400000; + break; /* => 2x2 MB */ + + case (INTEL_ID_28F320S3): + info->flash_id += FLASH_28F320S3; + info->sector_count = 64; + info->size = 0x00800000; + break; /* => 2x4 MB */ + + default: + info->flash_id = FLASH_UNKNOWN; + return (0); /* => no or unknown flash */ + + } + + /* set up sector start address table */ + for (i = 0; i < info->sector_count; i++) { + info->start[i] = base + (i * 0x00020000); + /* don't know how to check sector protection */ + info->protect[i] = 0; + } + + /* + * Prevent writes to uninitialized FLASH. + */ + if (info->flash_id != FLASH_UNKNOWN) { + addr = (vu_long *)info->start[0]; + + *addr = 0xFFFFFF; /* reset bank to read array mode */ + } + + return (info->size); +} + + +/*----------------------------------------------------------------------- + */ + +int flash_erase (flash_info_t *info, int s_first, int s_last) +{ + int flag, prot, 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_VENDMASK) != FLASH_MAN_INTEL) { + 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"); + } + + start = get_timer (0); + last = start; + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect<=s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + vu_long *addr = (vu_long *)(info->start[sect]); + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + /* Single Block Erase Command */ + *addr = 0x20202020; + /* Confirm */ + *addr = 0xD0D0D0D0; + /* Resume Command, as per errata update */ + *addr = 0xD0D0D0D0; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + /* wait at least 80us - let's wait 1 ms */ + udelay (1000); + + while ((*addr & 0x00800080) != 0x00800080) { + if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) { + printf ("Timeout\n"); + *addr = 0xFFFFFFFF; /* reset bank */ + return 1; + } + /* show that we're waiting */ + if ((now - last) > 1000) { /* every second */ + putc ('.'); + last = now; + } + } + + /* reset to read mode */ + *addr = 0xFFFFFFFF; + } + } + + 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) +{ + ulong cp, wp, data; + int i, l, rc; + + wp = (addr & ~3); /* get lower word aligned address */ + + /* + * handle unaligned start bytes + */ + if ((l = addr - wp) != 0) { + data = 0; + for (i=0, cp=wp; i<l; ++i, ++cp) { + data = (data << 8) | (*(uchar *)cp); + } + for (; i<4 && cnt>0; ++i) { + data = (data << 8) | *src++; + --cnt; + ++cp; + } + for (; cnt==0 && i<4; ++i, ++cp) { + data = (data << 8) | (*(uchar *)cp); + } + + if ((rc = write_word(info, wp, data)) != 0) { + return (rc); + } + wp += 4; + } + + /* + * handle word aligned part + */ + while (cnt >= 4) { + data = 0; + for (i=0; i<4; ++i) { + data = (data << 8) | *src++; + } + if ((rc = write_word(info, wp, data)) != 0) { + return (rc); + } + wp += 4; + cnt -= 4; + } + + if (cnt == 0) { + return (0); + } + + /* + * handle unaligned tail bytes + */ + data = 0; + for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { + data = (data << 8) | *src++; + --cnt; + } + for (; i<4; ++i, ++cp) { + data = (data << 8) | (*(uchar *)cp); + } + + return (write_word(info, wp, data)); +} + +/*----------------------------------------------------------------------- + * Write a word to Flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ +static int write_word (flash_info_t *info, ulong dest, ulong data) +{ + vu_long *addr = (vu_long *)dest; + ulong start, csr; + int flag; + + /* Check if Flash is (sufficiently) erased */ + if ((*addr & data) != data) { + return (2); + } + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + /* Write Command */ + *addr = 0x10101010; + + /* Write Data */ + *addr = data; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + /* data polling for D7 */ + start = get_timer (0); + flag = 0; + while (((csr = *addr) & 0x00800080) != 0x00800080) { + if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { + flag = 1; + break; + } + } + if (csr & 0x00400040) { +printf ("CSR indicates write error (%08lx) at %08lx\n", csr, (ulong)addr); + flag = 1; + } + + /* Clear Status Registers Command */ + *addr = 0x50505050; + /* Reset to read array mode */ + *addr = 0xFFFFFFFF; + + return (flag); +} + +/*----------------------------------------------------------------------- + */ |