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Diffstat (limited to 'board/sixnet/flash.c')
| -rw-r--r-- | board/sixnet/flash.c | 746 |
1 files changed, 746 insertions, 0 deletions
diff --git a/board/sixnet/flash.c b/board/sixnet/flash.c new file mode 100644 index 0000000000..c201875ba0 --- /dev/null +++ b/board/sixnet/flash.c @@ -0,0 +1,746 @@ +/* + * (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 */ + +/* NOTE - CONFIG_FLASH_16BIT means the CPU interface is 16-bit, it + * has nothing to do with the flash chip being 8-bit or 16-bit. + */ +#ifdef CONFIG_FLASH_16BIT +typedef unsigned short FLASH_PORT_WIDTH; +typedef volatile unsigned short FLASH_PORT_WIDTHV; +#define FLASH_ID_MASK 0xFFFF +#else +typedef unsigned long FLASH_PORT_WIDTH; +typedef volatile unsigned long FLASH_PORT_WIDTHV; +#define FLASH_ID_MASK 0xFFFFFFFF +#endif + +#define FPW FLASH_PORT_WIDTH +#define FPWV FLASH_PORT_WIDTHV + +#define ORMASK(size) ((-size) & OR_AM_MSK) + +/*----------------------------------------------------------------------- + * Functions + */ +static ulong flash_get_size(FPWV *addr, flash_info_t *info); +static void flash_reset(flash_info_t *info); +static int write_word_intel(flash_info_t *info, FPWV *dest, FPW data); +static int write_word_amd(flash_info_t *info, FPWV *dest, FPW data); +static void flash_get_offsets(ulong base, flash_info_t *info); +#ifdef CFG_FLASH_PROTECTION +static void flash_sync_real_protect(flash_info_t *info); +#endif + +/*----------------------------------------------------------------------- + * flash_init() + * + * sets up flash_info and returns size of FLASH (bytes) + */ +unsigned long flash_init (void) +{ + volatile immap_t *immap = (immap_t *)CFG_IMMR; + volatile memctl8xx_t *memctl = &immap->im_memctl; + unsigned long size_b; + int i; + + /* Init: no FLASHes known */ + for (i=0; i < CFG_MAX_FLASH_BANKS; ++i) { + flash_info[i].flash_id = FLASH_UNKNOWN; + } + + size_b = flash_get_size((FPW *)CFG_FLASH_BASE, &flash_info[0]); + + flash_info[0].size = size_b; + + if (flash_info[0].flash_id == FLASH_UNKNOWN) { + printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx\n",size_b); + } + + /* Remap FLASH according to real size, so only at proper address */ + memctl->memc_or0 = (memctl->memc_or0 & ~OR_AM_MSK) | ORMASK(size_b); + + /* Do this again (was done already in flast_get_size), just + * in case we move it when remap the FLASH. + */ + flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]); + +#ifdef CFG_FLASH_PROTECTION + /* read the hardware protection status (if any) into the + * protection array in flash_info. + */ + flash_sync_real_protect(&flash_info[0]); +#endif + +#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 + + return (size_b); +} + +/*----------------------------------------------------------------------- + */ +static void flash_reset(flash_info_t *info) +{ + FPWV *base = (FPWV *)(info->start[0]); + + /* Put FLASH back in read mode */ + if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) + *base = (FPW)0x00FF00FF; /* Intel Read Mode */ + else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD) + *base = (FPW)0x00F000F0; /* AMD Read Mode */ +} + +/*----------------------------------------------------------------------- + */ +static void flash_get_offsets (ulong base, flash_info_t *info) +{ + int i; + + /* set up sector start address table */ + if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL + && (info->flash_id & FLASH_BTYPE)) { + int bootsect_size; /* number of bytes/boot sector */ + int sect_size; /* number of bytes/regular sector */ + + bootsect_size = 0x00002000 * (sizeof(FPW)/2); + sect_size = 0x00010000 * (sizeof(FPW)/2); + + /* set sector offsets for bottom boot block type */ + for (i = 0; i < 8; ++i) { + info->start[i] = base + (i * bootsect_size); + } + for (i = 8; i < info->sector_count; i++) { + info->start[i] = base + ((i - 7) * sect_size); + } + } + else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD + && (info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U) { + + int sect_size; /* number of bytes/sector */ + + sect_size = 0x00010000 * (sizeof(FPW)/2); + + /* set up sector start address table (uniform sector type) */ + for( i = 0; i < info->sector_count; i++ ) + info->start[i] = base + (i * sect_size); + } +} + +/*----------------------------------------------------------------------- + */ + +void flash_print_info (flash_info_t *info) +{ + int i; + uchar *boottype; + uchar *bootletter; + uchar *fmt; + uchar botbootletter[] = "B"; + uchar topbootletter[] = "T"; + uchar botboottype[] = "bottom boot sector"; + uchar topboottype[] = "top boot sector"; + + 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_BM: printf ("BRIGHT MICRO "); 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; + default: printf ("Unknown Vendor "); break; + } + + /* check for top or bottom boot, if it applies */ + if (info->flash_id & FLASH_BTYPE) { + boottype = botboottype; + bootletter = botbootletter; + } + else { + boottype = topboottype; + bootletter = topbootletter; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AM640U: + fmt = "29LV641D (64 Mbit, uniform sectors)\n"; + break; + case FLASH_28F800C3B: + case FLASH_28F800C3T: + fmt = "28F800C3%s (8 Mbit, %s)\n"; + break; + case FLASH_INTEL800B: + case FLASH_INTEL800T: + fmt = "28F800B3%s (8 Mbit, %s)\n"; + break; + case FLASH_28F160C3B: + case FLASH_28F160C3T: + fmt = "28F160C3%s (16 Mbit, %s)\n"; + break; + case FLASH_INTEL160B: + case FLASH_INTEL160T: + fmt = "28F160B3%s (16 Mbit, %s)\n"; + break; + case FLASH_28F320C3B: + case FLASH_28F320C3T: + fmt = "28F320C3%s (32 Mbit, %s)\n"; + break; + case FLASH_INTEL320B: + case FLASH_INTEL320T: + fmt = "28F320B3%s (32 Mbit, %s)\n"; + break; + case FLASH_28F640C3B: + case FLASH_28F640C3T: + fmt = "28F640C3%s (64 Mbit, %s)\n"; + break; + case FLASH_INTEL640B: + case FLASH_INTEL640T: + fmt = "28F640B3%s (64 Mbit, %s)\n"; + break; + default: + fmt = "Unknown Chip Type\n"; + break; + } + + printf (fmt, bootletter, boottype); + + 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! + */ + +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[0x0555] = (FPW)0x00AA00AA; /* for AMD, Intel ignores this */ + addr[0x02AA] = (FPW)0x00550055; /* for AMD, Intel ignores this */ + addr[0x0555] = (FPW)0x00900090; /* 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. + */ + switch (addr[0] & 0xff) { + + case (uchar)AMD_MANUFACT: + info->flash_id = FLASH_MAN_AMD; + break; + + case (uchar)INTEL_MANUFACT: + info->flash_id = FLASH_MAN_INTEL; + break; + + default: + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + break; + } + + /* Check 16 bits or 32 bits of ID so work on 32 or 16 bit bus. */ + if (info->flash_id != FLASH_UNKNOWN) switch (addr[1]) { + + case (FPW)AMD_ID_LV640U: /* 29LV640 and 29LV641 have same ID */ + info->flash_id += FLASH_AM640U; + info->sector_count = 128; + info->size = 0x00800000 * (sizeof(FPW)/2); + break; /* => 8 or 16 MB */ + + case (FPW)INTEL_ID_28F800C3B: + info->flash_id += FLASH_28F800C3B; + info->sector_count = 23; + info->size = 0x00100000 * (sizeof(FPW)/2); + break; /* => 1 or 2 MB */ + + case (FPW)INTEL_ID_28F800B3B: + info->flash_id += FLASH_INTEL800B; + info->sector_count = 23; + info->size = 0x00100000 * (sizeof(FPW)/2); + break; /* => 1 or 2 MB */ + + case (FPW)INTEL_ID_28F160C3B: + info->flash_id += FLASH_28F160C3B; + info->sector_count = 39; + info->size = 0x00200000 * (sizeof(FPW)/2); + break; /* => 2 or 4 MB */ + + case (FPW)INTEL_ID_28F160B3B: + info->flash_id += FLASH_INTEL160B; + info->sector_count = 39; + info->size = 0x00200000 * (sizeof(FPW)/2); + break; /* => 2 or 4 MB */ + + case (FPW)INTEL_ID_28F320C3B: + info->flash_id += FLASH_28F320C3B; + info->sector_count = 71; + info->size = 0x00400000 * (sizeof(FPW)/2); + break; /* => 4 or 8 MB */ + + case (FPW)INTEL_ID_28F320B3B: + info->flash_id += FLASH_INTEL320B; + info->sector_count = 71; + info->size = 0x00400000 * (sizeof(FPW)/2); + break; /* => 4 or 8 MB */ + + case (FPW)INTEL_ID_28F640C3B: + info->flash_id += FLASH_28F640C3B; + info->sector_count = 135; + info->size = 0x00800000 * (sizeof(FPW)/2); + break; /* => 8 or 16 MB */ + + case (FPW)INTEL_ID_28F640B3B: + info->flash_id += FLASH_INTEL640B; + info->sector_count = 135; + info->size = 0x00800000 * (sizeof(FPW)/2); + break; /* => 8 or 16 MB */ + + default: + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + return (0); /* => no or unknown flash */ + } + + flash_get_offsets((ulong)addr, info); + + /* Put FLASH back in read mode */ + flash_reset(info); + + return (info->size); +} + +#ifdef CFG_FLASH_PROTECTION +/*----------------------------------------------------------------------- + */ + +static void flash_sync_real_protect(flash_info_t *info) +{ + FPWV *addr = (FPWV *)(info->start[0]); + FPWV *sect; + int i; + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_28F800C3B: + case FLASH_28F800C3T: + case FLASH_28F160C3B: + case FLASH_28F160C3T: + case FLASH_28F320C3B: + case FLASH_28F320C3T: + case FLASH_28F640C3B: + case FLASH_28F640C3T: + /* check for protected sectors */ + *addr = (FPW)0x00900090; + for (i = 0; i < info->sector_count; i++) { + /* read sector protection at sector address, (A7 .. A0) = 0x02. + * D0 = 1 for each device if protected. + * If at least one device is protected the sector is marked + * protected, but mixed protected and unprotected devices + * within a sector should never happen. + */ + sect = (FPWV *)(info->start[i]); + info->protect[i] = (sect[2] & (FPW)(0x00010001)) ? 1 : 0; + } + + /* Put FLASH back in read mode */ + flash_reset(info); + break; + + case FLASH_AM640U: + default: + /* no hardware protect that we support */ + break; + } +} +#endif + +/*----------------------------------------------------------------------- + */ + +int flash_erase (flash_info_t *info, int s_first, int s_last) +{ + FPWV *addr; + int flag, prot, sect; + int intel = (info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL; + ulong start, now, last; + int rcode = 0; + + 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; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_INTEL800B: + case FLASH_INTEL160B: + case FLASH_INTEL320B: + case FLASH_INTEL640B: + case FLASH_28F800C3B: + case FLASH_28F160C3B: + case FLASH_28F320C3B: + case FLASH_28F640C3B: + case FLASH_AM640U: + break; + case FLASH_UNKNOWN: + default: + 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 && rcode == 0; sect++) { + + if (info->protect[sect] != 0) /* protected, skip it */ + continue; + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + addr = (FPWV *)(info->start[sect]); + if (intel) { + *addr = (FPW)0x00500050; /* clear status register */ + *addr = (FPW)0x00200020; /* erase setup */ + *addr = (FPW)0x00D000D0; /* erase confirm */ + } + else { + /* must be AMD style if not Intel */ + FPWV *base; /* first address in bank */ + + base = (FPWV *)(info->start[0]); + base[0x0555] = (FPW)0x00AA00AA; /* unlock */ + base[0x02AA] = (FPW)0x00550055; /* unlock */ + base[0x0555] = (FPW)0x00800080; /* erase mode */ + base[0x0555] = (FPW)0x00AA00AA; /* unlock */ + base[0x02AA] = (FPW)0x00550055; /* unlock */ + *addr = (FPW)0x00300030; /* erase sector */ + } + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + /* wait at least 50us for AMD, 80us for Intel. + * Let's wait 1 ms. + */ + udelay (1000); + + while ((*addr & (FPW)0x00800080) != (FPW)0x00800080) { + if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) { + printf ("Timeout\n"); + + if (intel) { + /* suspend erase */ + *addr = (FPW)0x00B000B0; + } + + flash_reset(info); /* reset to read mode */ + rcode = 1; /* failed */ + break; + } + + /* show that we're waiting */ + if ((now - last) > 1000) { /* every second */ + putc ('.'); + last = now; + } + } + + flash_reset(info); /* reset to read mode */ + } + + printf (" done\n"); + return rcode; +} + +/*----------------------------------------------------------------------- + * 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) +{ + FPW data = 0; /* 16 or 32 bit word, matches flash bus width on MPC8XX */ + int bytes; /* number of bytes to program in current word */ + int left; /* number of bytes left to program */ + int i, res; + + for (left = cnt, res = 0; + left > 0 && res == 0; + addr += sizeof(data), left -= sizeof(data) - bytes) { + + bytes = addr & (sizeof(data) - 1); + addr &= ~(sizeof(data) - 1); + + /* combine source and destination data so can program + * an entire word of 16 or 32 bits + */ + for (i = 0; i < sizeof(data); i++) { + data <<= 8; + if (i < bytes || i - bytes >= left ) + data += *((uchar *)addr + i); + else + data += *src++; + } + + /* write one word to the flash */ + switch (info->flash_id & FLASH_VENDMASK) { + case FLASH_MAN_AMD: + res = write_word_amd(info, (FPWV *)addr, data); + break; + case FLASH_MAN_INTEL: + res = write_word_intel(info, (FPWV *)addr, data); + break; + default: + /* unknown flash type, error! */ + printf ("missing or unknown FLASH type\n"); + res = 1; /* not really a timeout, but gives error */ + break; + } + } + + return (res); +} + +/*----------------------------------------------------------------------- + * Write a word to Flash for AMD FLASH + * A word is 16 or 32 bits, whichever the bus width of the flash bank + * (not an individual chip) is. + * + * returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ +static int write_word_amd (flash_info_t *info, FPWV *dest, FPW data) +{ + ulong start; + int flag; + int res = 0; /* result, assume success */ + FPWV *base; /* first address in flash bank */ + + /* Check if Flash is (sufficiently) erased */ + if ((*dest & data) != data) { + return (2); + } + + + base = (FPWV *)(info->start[0]); + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + base[0x0555] = (FPW)0x00AA00AA; /* unlock */ + base[0x02AA] = (FPW)0x00550055; /* unlock */ + base[0x0555] = (FPW)0x00A000A0; /* selects program mode */ + + *dest = data; /* start programming the data */ + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + start = get_timer (0); + + /* data polling for D7 */ + while (res == 0 && (*dest & (FPW)0x00800080) != (data & (FPW)0x00800080)) { + if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { + *dest = (FPW)0x00F000F0; /* reset bank */ + res = 1; + } + } + + return (res); +} + +/*----------------------------------------------------------------------- + * Write a word to Flash for Intel FLASH + * A word is 16 or 32 bits, whichever the bus width of the flash bank + * (not an individual chip) is. + * + * returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ +static int write_word_intel (flash_info_t *info, FPWV *dest, FPW data) +{ + ulong start; + int flag; + int res = 0; /* result, assume success */ + + /* Check if Flash is (sufficiently) erased */ + if ((*dest & data) != data) { + return (2); + } + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + *dest = (FPW)0x00500050; /* clear status register */ + *dest = (FPW)0x00FF00FF; /* make sure in read mode */ + *dest = (FPW)0x00400040; /* program setup */ + + *dest = data; /* start programming the data */ + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + start = get_timer (0); + + while (res == 0 && (*dest & (FPW)0x00800080) != (FPW)0x00800080) { + if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { + *dest = (FPW)0x00B000B0; /* Suspend program */ + res = 1; + } + } + + if (res == 0 && (*dest & (FPW)0x00100010)) + res = 1; /* write failed, time out error is close enough */ + + *dest = (FPW)0x00500050; /* clear status register */ + *dest = (FPW)0x00FF00FF; /* make sure in read mode */ + + return (res); +} + +#ifdef CFG_FLASH_PROTECTION +/*----------------------------------------------------------------------- + */ +int flash_real_protect (flash_info_t * info, long sector, int prot) +{ + int rcode = 0; /* assume success */ + FPWV *addr; /* address of sector */ + FPW value; + + addr = (FPWV *) (info->start[sector]); + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_28F800C3B: + case FLASH_28F800C3T: + case FLASH_28F160C3B: + case FLASH_28F160C3T: + case FLASH_28F320C3B: + case FLASH_28F320C3T: + case FLASH_28F640C3B: + case FLASH_28F640C3T: + flash_reset (info); /* make sure in read mode */ + *addr = (FPW) 0x00600060L; /* lock command setup */ + if (prot) + *addr = (FPW) 0x00010001L; /* lock sector */ + else + *addr = (FPW) 0x00D000D0L; /* unlock sector */ + flash_reset (info); /* reset to read mode */ + + /* now see if it really is locked/unlocked as requested */ + *addr = (FPW) 0x00900090; + /* read sector protection at sector address, (A7 .. A0) = 0x02. + * D0 = 1 for each device if protected. + * If at least one device is protected the sector is marked + * protected, but return failure. Mixed protected and + * unprotected devices within a sector should never happen. + */ + value = addr[2] & (FPW) 0x00010001; + if (value == 0) + info->protect[sector] = 0; + else if (value == (FPW) 0x00010001) + info->protect[sector] = 1; + else { + /* error, mixed protected and unprotected */ + rcode = 1; + info->protect[sector] = 1; + } + if (info->protect[sector] != prot) + rcode = 1; /* failed to protect/unprotect as requested */ + + /* reload all protection bits from hardware for now */ + flash_sync_real_protect (info); + break; + + case FLASH_AM640U: + default: + /* no hardware protect that we support */ + info->protect[sector] = prot; + break; + } + + return rcode; +} +#endif |
