diff options
author | Stefan Roese <sr@denx.de> | 2005-08-22 17:51:53 +0200 |
---|---|---|
committer | Stefan Roese <sr@denx.de> | 2005-08-22 17:51:53 +0200 |
commit | 5e4b3361bc0ccb2138569f872be60165ebeefb57 (patch) | |
tree | 1c68b9470b453554bb51ab23c431d8a183b1871a /board/esd/pf5200/flash.c | |
parent | c0233d979bda450ba23896357aa4711aecf55f7c (diff) |
Add esd cpci5200 and pf5200 boards
Patch by Reinhard Arlt, 22 Aug 2005
Diffstat (limited to 'board/esd/pf5200/flash.c')
-rw-r--r-- | board/esd/pf5200/flash.c | 461 |
1 files changed, 461 insertions, 0 deletions
diff --git a/board/esd/pf5200/flash.c b/board/esd/pf5200/flash.c new file mode 100644 index 00000000000..bfbd0907cf1 --- /dev/null +++ b/board/esd/pf5200/flash.c @@ -0,0 +1,461 @@ +/* + * (C) Copyright 2003 + * 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> + +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 FLASH_ID_MASK 0x00FF + +#define FPW FLASH_PORT_WIDTH +#define FPWV FLASH_PORT_WIDTHV + +#define FLASH_CYCLE1 0x0555 +#define FLASH_CYCLE2 0x0aaa +#define FLASH_ID1 0x00 +#define FLASH_ID2 0x01 +#define FLASH_ID3 0x0E +#define FLASH_ID4 0x0F + +/*----------------------------------------------------------------------- + * Functions + */ +static ulong flash_get_size(FPWV * addr, flash_info_t * info); +static void flash_reset(flash_info_t * info); +static int write_word_amd(flash_info_t * info, FPWV * dest, FPW data); +static flash_info_t *flash_get_info(ulong base); + +/*----------------------------------------------------------------------- + * flash_init() + * + * sets up flash_info and returns size of FLASH (bytes) + */ +unsigned long flash_init(void) +{ + unsigned long size = 0; + int i = 0; + extern void flash_preinit(void); + extern void flash_afterinit(uint, ulong, ulong); + + ulong flashbase = CFG_FLASH_BASE; + + flash_preinit(); + + /* There is only ONE FLASH device */ + memset(&flash_info[i], 0, sizeof(flash_info_t)); + flash_info[i].size = flash_get_size((FPW *) flashbase, &flash_info[i]); + size += flash_info[i].size; + +#if CFG_MONITOR_BASE >= CFG_FLASH_BASE + /* monitor protection ON by default */ + flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE, + CFG_MONITOR_BASE + monitor_flash_len - 1, + flash_get_info(CFG_MONITOR_BASE)); +#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_SIZE - 1, + flash_get_info(CFG_ENV_ADDR)); +#endif + + flash_afterinit(i, flash_info[i].start[0], flash_info[i].size); + return size ? size : 1; +} + +/*----------------------------------------------------------------------- + */ +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 flash_info_t *flash_get_info(ulong base) { + int i; + flash_info_t *info; + + for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) { + info = &flash_info[i]; + if ((info->size) && (info->start[0] <= base) + && (base <= info->start[0] + info->size - 1)) { + break; + } + } + return (i == CFG_MAX_FLASH_BANKS ? 0 : info); +} + +/*----------------------------------------------------------------------- + */ + +void flash_print_info(flash_info_t * info) { + int i; + uchar *fmt; + + 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; + default: + printf("Unknown Vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AMLV256U: + fmt = "29LV256M (256 Mbit)\n"; + break; + default: + fmt = "Unknown Chip Type\n"; + break; + } + + printf(fmt); + 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) { + ulong size; + int erased; + ulong *flash = (unsigned long *)info->start[i]; + + if ((i % 5) == 0) { + printf("\n "); + } + + /* + * Check if whole sector is erased + */ + size = + (i != + (info->sector_count - 1)) ? (info->start[i + 1] - + info->start[i]) >> 2 : (info-> + start + [0] + + info-> + size - + info-> + start + [i]) + >> 2; + + for (flash = (unsigned long *)info->start[i], erased = 1; + (flash != (unsigned long *)info->start[i] + size) + && erased; flash++) { + erased = *flash == ~0x0UL; + } + printf(" %08lX %s %s", info->start[i], erased ? "E" : " ", + info->protect[i] ? "(RO)" : " "); + } + + printf("\n"); +} + +/*----------------------------------------------------------------------- + */ + +/* + * The following code cannot be run from FLASH! + */ + +ulong flash_get_size(FPWV * addr, flash_info_t * info) { + int i; + + /* 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 */ + + /* The manufacturer codes are only 1 byte, so just use 1 byte. */ + /* This works for any bus width and any FLASH device width. */ + udelay(100); + switch (addr[FLASH_ID1] & 0x00ff) { + case (uchar) AMD_MANUFACT: + info->flash_id = FLASH_MAN_AMD; + break; + default: + printf("unknown vendor=%x ", addr[FLASH_ID1] & 0xff); + 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 ((FPW) addr[FLASH_ID2]) { + case (FPW) AMD_ID_MIRROR: + /* MIRROR BIT FLASH, read more ID bytes */ + if ((FPW) addr[FLASH_ID3] == (FPW) AMD_ID_LV256U_2 + && (FPW) addr[FLASH_ID4] == (FPW) AMD_ID_LV256U_3) { + /* attention: only the first 16 MB will be used in u-boot */ + info->flash_id += FLASH_AMLV256U; + info->sector_count = 512; + info->size = 0x02000000; + for (i = 0; i < info->sector_count; i++) { + info->start[i] = + (ulong) addr + 0x10000 * i; + } + break; + } + /* fall thru to here ! */ + default: + printf("unknown AMD device=%x %x %x", + (FPW) addr[FLASH_ID2], (FPW) addr[FLASH_ID3], + (FPW) addr[FLASH_ID4]); + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0x800000; + break; + } + + /* Put FLASH back in read mode */ + flash_reset(info); + } + return (info->size); +} + +/*----------------------------------------------------------------------- + */ + +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_AMLV256U: + 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"); + } + + last = get_timer(0); + + /* 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[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */ + base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */ + base[FLASH_CYCLE1] = (FPW) 0x00800080; /* erase mode */ + base[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */ + base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */ + *addr = (FPW) 0x00300030; /* erase sector */ + } + + /* re-enable interrupts if necessary */ + if (flag) { + enable_interrupts(); + } + start = get_timer(0); + + /* 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 ((get_timer(last)) > CFG_HZ) { + /* every second */ + putc('.'); + last = get_timer(0); + } + } + /* show that we're waiting */ + if ((get_timer(last)) > CFG_HZ) { + /* every second */ + putc('.'); + last = get_timer(0); + } + 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; + 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[FLASH_CYCLE1] = (FPW) 0x00AA00AA; /* unlock */ + base[FLASH_CYCLE2] = (FPW) 0x00550055; /* unlock */ + base[FLASH_CYCLE1] = (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); +} |