diff options
Diffstat (limited to 'board/cmc_pu2/flash.c')
| -rw-r--r-- | board/cmc_pu2/flash.c | 118 |
1 files changed, 65 insertions, 53 deletions
diff --git a/board/cmc_pu2/flash.c b/board/cmc_pu2/flash.c index 9baa473..6105d56 100644 --- a/board/cmc_pu2/flash.c +++ b/board/cmc_pu2/flash.c @@ -37,11 +37,11 @@ flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ typedef unsigned short FLASH_PORT_WIDTH; typedef volatile unsigned short FLASH_PORT_WIDTHV; -#define FPW FLASH_PORT_WIDTH -#define FPWV FLASH_PORT_WIDTHV +#define FPW FLASH_PORT_WIDTH +#define FPWV FLASH_PORT_WIDTHV #define FLASH_CYCLE1 0x0555 -#define FLASH_CYCLE2 0x02aa +#define FLASH_CYCLE2 0x02AA /*----------------------------------------------------------------------- * Functions @@ -96,9 +96,9 @@ static void flash_reset(flash_info_t *info) /* Put FLASH back in read mode */ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) - *base = (FPW)0x00FF00FF; /* Intel Read Mode */ + *base = (FPW)0x00FF; /* Intel Read Mode */ else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) - *base = (FPW)0x00F000F0; /* AMD Read Mode */ + *base = (FPW)0x00F0; /* AMD Read Mode */ } /*----------------------------------------------------------------------- @@ -183,9 +183,9 @@ ulong flash_get_size (FPWV *addr, flash_info_t *info) /* Write auto select command: read Manufacturer ID */ /* Write auto select command sequence and test FLASH answer */ - addr[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* for AMD, Intel ignores this */ - addr[FLASH_CYCLE2] = (FPW)0x00550055; /* for AMD, Intel ignores this */ - addr[FLASH_CYCLE1] = (FPW)0x00900090; /* selects Intel or AMD */ + addr[FLASH_CYCLE1] = (FPW)0x00AA; /* for AMD, Intel ignores this */ + addr[FLASH_CYCLE2] = (FPW)0x0055; /* for AMD, Intel ignores this */ + addr[FLASH_CYCLE1] = (FPW)0x0090; /* selects Intel or AMD */ /* The manufacturer codes are only 1 byte, so just use 1 byte. * This works for any bus width and any FLASH device width. @@ -262,7 +262,7 @@ ulong flash_get_size (FPWV *addr, flash_info_t *info) int flash_erase (flash_info_t *info, int s_first, int s_last) { FPWV *addr = (FPWV *)(info->start[0]); - int flag, prot, sect, l_sect; + int flag, prot, sect, ssect, l_sect; ulong start, now, last; printf ("flash_erase: first: %d last: %d\n", s_first, s_last); @@ -297,58 +297,70 @@ int flash_erase (flash_info_t *info, int s_first, int s_last) printf ("\n"); } - l_sect = -1; - /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); - addr[0x0555] = 0x00AA; - addr[0x02AA] = 0x0055; - addr[0x0555] = 0x0080; - addr[0x0555] = 0x00AA; - addr[0x02AA] = 0x0055; - - /* Start erase on unprotected sectors */ - for (sect = s_first; sect<=s_last; sect++) { - if (info->protect[sect] == 0) { /* not protected */ - addr = (FPWV *)(info->start[sect]); - addr[0] = 0x0030; - l_sect = sect; + /* + * Start erase on unprotected sectors. + * Since the flash can erase multiple sectors with one command + * we take advantage of that by doing the erase in chunks of + * 3 sectors. + */ + for (sect = s_first; sect <= s_last; ) { + l_sect = -1; + + addr[FLASH_CYCLE1] = 0x00AA; + addr[FLASH_CYCLE2] = 0x0055; + addr[FLASH_CYCLE1] = 0x0080; + addr[FLASH_CYCLE1] = 0x00AA; + addr[FLASH_CYCLE2] = 0x0055; + + /* do the erase in chunks of at most 3 sectors */ + for (ssect = 0; ssect < 3; ssect++) { + if ((sect + ssect) > s_last) + break; + if (info->protect[sect + ssect] == 0) { /* not protected */ + addr = (FPWV *)(info->start[sect + ssect]); + addr[0] = 0x0030; + l_sect = sect + ssect; + } } + /* 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 = (FPWV *)(info->start[l_sect]); + while ((addr[0] & 0x0080) != 0x0080) { + 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; + } + } + addr = (FPWV *)info->start[0]; + addr[0] = 0x00F0; /* reset bank */ + sect += ssect; } /* 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 = (FPWV *)(info->start[l_sect]); - while ((addr[0] & 0x00000080) != 0x00000080) { - 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 = (FPWV *)info->start[0]; - addr[0] = 0x000000F0; /* reset bank */ + addr[0] = 0x00F0; /* reset bank */ printf (" done\n"); return 0; @@ -432,9 +444,9 @@ static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data) /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); - base[FLASH_CYCLE1] = (FPW)0x00AA00AA; /* unlock */ - base[FLASH_CYCLE2] = (FPW)0x00550055; /* unlock */ - base[FLASH_CYCLE1] = (FPW)0x00A000A0; /* selects program mode */ + base[FLASH_CYCLE1] = (FPW)0x00AA; /* unlock */ + base[FLASH_CYCLE2] = (FPW)0x0055; /* unlock */ + base[FLASH_CYCLE1] = (FPW)0x00A0; /* selects program mode */ *dest = data; /* start programming the data */ @@ -445,9 +457,9 @@ static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data) start = get_timer (0); /* data polling for D7 */ - while ((*dest & (FPW)0x00000080) != (data & (FPW)0x00000080)) { + while ((*dest & (FPW)0x0080) != (data & (FPW)0x0080)) { if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { - *dest = (FPW)0x000000F0; /* reset bank */ + *dest = (FPW)0x00F0; /* reset bank */ return (1); } } |