diff options
| -rw-r--r-- | board/lwmon/flash.c | 556 |
1 files changed, 556 insertions, 0 deletions
diff --git a/board/lwmon/flash.c b/board/lwmon/flash.c new file mode 100644 index 0000000..3d2a00f --- /dev/null +++ b/board/lwmon/flash.c @@ -0,0 +1,556 @@ +/* + * (C) Copyright 2001 + * 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 + */ + +/* #define DEBUG */ + +#include <common.h> +#include <mpc8xx.h> + +#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 + +/*---------------------------------------------------------------------*/ + +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_data (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; + unsigned long size_b0, size_b1; + int i; + + /* Init: no FLASHes known */ + for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { + flash_info[i].flash_id = FLASH_UNKNOWN; + } + + /* Static FLASH Bank configuration here - FIXME XXX */ + + debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM); + + size_b0 = 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: " + "ID 0x%lx, Size = 0x%08lx = %ld MB\n", + flash_info[0].flash_id, + size_b0, size_b0<<20); + } + + debug ("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE1_PRELIM); + + size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]); + + debug ("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1); + + if (size_b1 > size_b0) { + printf ("## ERROR: " + "Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n", + size_b1, size_b1<<20, + size_b0, size_b0<<20 + ); + flash_info[0].flash_id = FLASH_UNKNOWN; + flash_info[1].flash_id = FLASH_UNKNOWN; + flash_info[0].sector_count = -1; + flash_info[1].sector_count = -1; + flash_info[0].size = 0; + flash_info[1].size = 0; + return (0); + } + + debug ("## Before remap: " + "BR0: 0x%08x OR0: 0x%08x " + "BR1: 0x%08x OR1: 0x%08x\n", + memctl->memc_br0, memctl->memc_or0, + memctl->memc_br1, memctl->memc_or1); + + /* Remap FLASH according to real size */ + memctl->memc_or0 = (-size_b0 & 0xFFFF8000) | CFG_OR_TIMING_FLASH | + OR_CSNT_SAM | OR_ACS_DIV1; + memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_PS_32 | BR_V; + + debug ("## BR0: 0x%08x OR0: 0x%08x\n", + memctl->memc_br0, memctl->memc_or0); + + /* Re-do sizing to get full correct info */ + size_b0 = 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_b0; + +#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 + + if (size_b1) { + memctl->memc_or1 = (-size_b1 & 0xFFFF8000) | CFG_OR_TIMING_FLASH | + OR_CSNT_SAM | OR_ACS_DIV1; + memctl->memc_br1 = ((CFG_FLASH_BASE + size_b0) & BR_BA_MSK) | + BR_PS_32 | BR_V; + + debug ("## BR1: 0x%08x OR1: 0x%08x\n", + memctl->memc_br1, memctl->memc_or1); + + /* Re-do sizing to get full correct info */ + size_b1 = flash_get_size((vu_long *)(CFG_FLASH_BASE + size_b0), + &flash_info[1]); + + flash_info[1].size = size_b1; + + flash_get_offsets (CFG_FLASH_BASE + size_b0, &flash_info[1]); + +#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[1]); +#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[1]); +#endif + } else { + memctl->memc_br1 = 0; /* invalidate bank */ + memctl->memc_or1 = 0; /* invalidate bank */ + + debug ("## DISABLE BR1: 0x%08x OR1: 0x%08x\n", + memctl->memc_br1, memctl->memc_or1); + + flash_info[1].flash_id = FLASH_UNKNOWN; + flash_info[1].sector_count = -1; + flash_info[1].size = 0; + } + + debug ("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1); + + return (size_b0 + size_b1); +} + +/*----------------------------------------------------------------------- + */ +static void flash_get_offsets (ulong base, flash_info_t *info) +{ + int i; + + if (info->flash_id == FLASH_UNKNOWN) { + return; + } + + switch (info->flash_id & FLASH_VENDMASK) { + case FLASH_MAN_INTEL: + for (i = 0; i < info->sector_count; i++) { + info->start[i] = base; + base += 0x00020000 * 2; /* 128k * 2 chips per bank */ + } + return; + + default: + printf ("Don't know sector ofsets for flash type 0x%lx\n", + info->flash_id); + return; + } +} + +/*----------------------------------------------------------------------- + */ +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_SST: printf ("SST "); break; + case FLASH_MAN_STM: printf ("STM "); break; + case FLASH_MAN_INTEL: printf ("Intel "); break; + case FLASH_MAN_MT: printf ("MT "); break; + default: printf ("Unknown Vendor "); break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_28F320J3A: printf ("28F320J3A (32Mbit = 128K x 32)\n"); + break; + case FLASH_28F640J3A: printf ("28F640J3A (64Mbit = 128K x 64)\n"); + break; + case FLASH_28F128J3A: printf ("28F128J3A (128Mbit = 128K x 128)\n"); + break; + default: printf ("Unknown Chip Type\n"); + break; + } + + if (info->size >= (1 << 20)) { + i = 20; + } else { + i = 10; + } + printf (" Size: %ld %cB in %d Sectors\n", + info->size >> i, + (i == 20) ? 'M' : 'k', + 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) +{ + ulong value; + + /* Read Manufacturer ID */ + addr[0] = 0x00900090; + value = addr[0]; + + debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value); + + switch (value) { + case AMD_MANUFACT: + info->flash_id = FLASH_MAN_AMD; + break; + case FUJ_MANUFACT: + info->flash_id = FLASH_MAN_FUJ; + break; + case SST_MANUFACT: + info->flash_id = FLASH_MAN_SST; + break; + case STM_MANUFACT: + info->flash_id = FLASH_MAN_STM; + break; + case INTEL_MANUFACT: + info->flash_id = FLASH_MAN_INTEL; + break; + default: + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + addr[0] = 0x00FF00FF; /* restore read mode */ + return (0); /* no or unknown flash */ + } + + value = addr[1]; /* device ID */ + + debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value); + + switch (value) { + case INTEL_ID_28F320J3A: + info->flash_id += FLASH_28F320J3A; + info->sector_count = 32; + info->size = 0x00400000 * 2; + break; /* => 8 MB */ + + case INTEL_ID_28F640J3A: + info->flash_id += FLASH_28F640J3A; + info->sector_count = 64; + info->size = 0x00800000 * 2; + break; /* => 16 MB */ + + case INTEL_ID_28F128J3A: + info->flash_id += FLASH_28F128J3A; + info->sector_count = 128; + info->size = 0x01000000 * 2; + break; /* => 32 MB */ + + default: + info->flash_id = FLASH_UNKNOWN; + addr[0] = 0x00FF00FF; /* restore read mode */ + return (0); /* => no or unknown flash */ + + } + + if (info->sector_count > CFG_MAX_FLASH_SECT) { + printf ("** ERROR: sector count %d > max (%d) **\n", + info->sector_count, CFG_MAX_FLASH_SECT); + info->sector_count = CFG_MAX_FLASH_SECT; + } + + addr[0] = 0x00FF00FF; /* restore read 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; + + debug ("flash_erase: first: %d last: %d\n", s_first, s_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 erase only Intel flash types - aborted\n"); + 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]); + unsigned long status; + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + *addr = 0x00500050; /* clear status register */ + *addr = 0x00200020; /* erase setup */ + *addr = 0x00D000D0; /* erase confirm */ + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + /* wait at least 80us - let's wait 1 ms */ + udelay (1000); + + while (((status = *addr) & 0x00800080) != 0x00800080) { + if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) { + printf ("Timeout\n"); + *addr = 0x00B000B0; /* suspend erase */ + *addr = 0x00FF00FF; /* reset to read mode */ + return 1; + } + + /* show that we're waiting */ + if ((now - last) > 1000) { /* every second */ + putc ('.'); + last = now; + } + } + + *addr = 0x00FF00FF; /* reset to read mode */ + } + } + printf (" done\n"); + return 0; +} + +/*----------------------------------------------------------------------- + * Copy memory to flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + * 4 - Flash not identified + */ + +#define FLASH_WIDTH 4 /* flash bus width in bytes */ + +int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) +{ + ulong cp, wp, data; + int i, l, rc; + + if (info->flash_id == FLASH_UNKNOWN) { + return 4; + } + + wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH 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<FLASH_WIDTH && cnt>0; ++i) { + data = (data << 8) | *src++; + --cnt; + ++cp; + } + for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) { + data = (data << 8) | (*(uchar *)cp); + } + + if ((rc = write_data(info, wp, data)) != 0) { + return (rc); + } + wp += FLASH_WIDTH; + } + + /* + * handle FLASH_WIDTH aligned part + */ + while (cnt >= FLASH_WIDTH) { + data = 0; + for (i=0; i<FLASH_WIDTH; ++i) { + data = (data << 8) | *src++; + } + if ((rc = write_data(info, wp, data)) != 0) { + return (rc); + } + wp += FLASH_WIDTH; + cnt -= FLASH_WIDTH; + } + + if (cnt == 0) { + return (0); + } + + /* + * handle unaligned tail bytes + */ + data = 0; + for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) { + data = (data << 8) | *src++; + --cnt; + } + for (; i<FLASH_WIDTH; ++i, ++cp) { + data = (data << 8) | (*(uchar *)cp); + } + + return (write_data(info, wp, data)); +} + +/*----------------------------------------------------------------------- + * Write a word to Flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ +static int write_data (flash_info_t *info, ulong dest, ulong data) +{ + vu_long *addr = (vu_long *)dest; + ulong status; + ulong start; + 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(); + + *addr = 0x00400040; /* write setup */ + *addr = data; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + start = get_timer (0); + + while (((status = *addr) & 0x00800080) != 0x00800080) { + if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { + *addr = 0x00FF00FF; /* restore read mode */ + return (1); + } + } + + *addr = 0x00FF00FF; /* restore read mode */ + + return (0); +} + +/*----------------------------------------------------------------------- + */ |