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Diffstat (limited to 'u-boot/board/jse/flash.c')
| -rw-r--r-- | u-boot/board/jse/flash.c | 520 |
1 files changed, 520 insertions, 0 deletions
diff --git a/u-boot/board/jse/flash.c b/u-boot/board/jse/flash.c new file mode 100644 index 0000000..5735f19 --- /dev/null +++ b/u-boot/board/jse/flash.c @@ -0,0 +1,520 @@ +/* + * (C) Copyright 2000-2004 + * 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 + */ + +/* + * Modified 4/5/2001 + * Wait for completion of each sector erase command issued + * 4/5/2001 + * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com + */ + +#include <common.h> +#include <asm/ppc4xx.h> +#include <asm/processor.h> + +#if CONFIG_SYS_MAX_FLASH_BANKS != 1 +#error "CONFIG_SYS_MAX_FLASH_BANKS must be 1" +#endif +flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ + +/*----------------------------------------------------------------------- + * 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); + +#define ADDR0 0x5555 +#define ADDR1 0x2aaa +#define FLASH_WORD_SIZE unsigned char + +/*----------------------------------------------------------------------- + */ + +unsigned long flash_init (void) +{ + unsigned long size_b0; + + /* Init: no FLASHes known */ + flash_info[0].flash_id = FLASH_UNKNOWN; + + /* Static FLASH Bank configuration here - FIXME XXX */ + + 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 - Size = 0x%08lx = %ld MB\n", + size_b0, size_b0 << 20); + } + + /* Only one bank */ + /* Setup offsets */ + flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]); + + /* Monitor protection ON by default */ + (void) flash_protect (FLAG_PROTECT_SET, + FLASH_BASE0_PRELIM, + FLASH_BASE0_PRELIM + monitor_flash_len - 1, + &flash_info[0]); + flash_info[0].size = size_b0; + + return size_b0; +} + + +/*----------------------------------------------------------------------- + */ +/* + * This implementation assumes that the flash chips are uniform sector + * devices. This is true for all likely JSE devices. + */ +static void flash_get_offsets (ulong base, flash_info_t * info) +{ + unsigned idx; + unsigned long sector_size = info->size / info->sector_count; + + for (idx = 0; idx < info->sector_count; idx += 1) { + info->start[idx] = base + (idx * sector_size); + } +} + +/*----------------------------------------------------------------------- + */ +void flash_print_info (flash_info_t * info) +{ + int i; + int k; + int size; + int erased; + volatile unsigned long *flash; + + 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 ("ST Micro "); + break; + default: + printf ("Unknown Vendor "); + break; + } + + /* (Reduced table of only parts expected in JSE boards.) */ + switch (info->flash_id) { + case FLASH_MAN_AMD | FLASH_AM040: + printf ("AM29F040 (512 Kbit, uniform sector size)\n"); + break; + case FLASH_MAN_STM | FLASH_AM040: + printf ("MM29W040W (512 Kbit, uniform sector size)\n"); + break; + default: + printf ("Unknown Chip Type\n"); + break; + } + + printf (" Size: %ld KB in %d Sectors\n", + info->size >> 10, info->sector_count); + + printf (" Sector Start Addresses:"); + for (i = 0; i < info->sector_count; ++i) { + /* + * Check if whole sector is erased + */ + if (i != (info->sector_count - 1)) + size = info->start[i + 1] - info->start[i]; + else + size = info->start[0] + info->size - info->start[i]; + erased = 1; + flash = (volatile unsigned long *) info->start[i]; + size = size >> 2; /* divide by 4 for longword access */ + for (k = 0; k < size; k++) { + if (*flash++ != 0xffffffff) { + erased = 0; + break; + } + } + + if ((i % 5) == 0) + printf ("\n "); + printf (" %08lX%s%s", + info->start[i], + erased ? " E" : " ", 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; + FLASH_WORD_SIZE value; + ulong base = (ulong) addr; + volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) addr; + + /* Write auto select command: read Manufacturer ID */ + addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; + addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; + addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00900090; + + value = addr2[0]; + + switch (value) { + case (FLASH_WORD_SIZE) AMD_MANUFACT: + info->flash_id = FLASH_MAN_AMD; + break; + case (FLASH_WORD_SIZE) FUJ_MANUFACT: + info->flash_id = FLASH_MAN_FUJ; + break; + case (FLASH_WORD_SIZE) SST_MANUFACT: + info->flash_id = FLASH_MAN_SST; + break; + case (FLASH_WORD_SIZE)STM_MANUFACT: + info->flash_id = FLASH_MAN_STM; + break; + default: + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + printf("Unknown flash manufacturer code: 0x%x\n", value); + return (0); /* no or unknown flash */ + } + + value = addr2[1]; /* device ID */ + + switch (value) { + case (FLASH_WORD_SIZE) AMD_ID_F040B: + info->flash_id += FLASH_AM040; + info->sector_count = 8; + info->size = 0x0080000; /* => 512 ko */ + break; + case (FLASH_WORD_SIZE) AMD_ID_LV040B: + info->flash_id += FLASH_AM040; + info->sector_count = 8; + info->size = 0x0080000; /* => 512 ko */ + break; + case (FLASH_WORD_SIZE)STM_ID_M29W040B: /* most likele JSE chip */ + info->flash_id += FLASH_AM040; + info->sector_count = 8; + info->size = 0x0080000; /* => 512 ko */ + break; + default: + info->flash_id = FLASH_UNKNOWN; + return (0); /* => no or unknown flash */ + + } + + /* Calculate the sector offsets (Use JSE Optimized code). */ + flash_get_offsets(base, info); + + /* check for protected sectors */ + for (i = 0; i < info->sector_count; i++) { + /* read sector protection at sector address, (A7 .. A0) = 0x02 */ + /* D0 = 1 if protected */ + addr2 = (volatile FLASH_WORD_SIZE *) (info->start[i]); + if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) + info->protect[i] = 0; + else + info->protect[i] = addr2[2] & 1; + } + + /* + * Prevent writes to uninitialized FLASH. + */ + if (info->flash_id != FLASH_UNKNOWN) { + addr2 = (FLASH_WORD_SIZE *) info->start[0]; + *addr2 = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */ + } + + return (info->size); +} + +int wait_for_DQ7 (flash_info_t * info, int sect) +{ + ulong start, now, last; + volatile FLASH_WORD_SIZE *addr = + (FLASH_WORD_SIZE *) (info->start[sect]); + + start = get_timer (0); + last = start; + while ((addr[0] & (FLASH_WORD_SIZE) 0x00800080) != + (FLASH_WORD_SIZE) 0x00800080) { + if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { + printf ("Timeout\n"); + return -1; + } + /* show that we're waiting */ + if ((now - last) > 1000) { /* every second */ + putc ('.'); + last = now; + } + } + return 0; +} + +/*----------------------------------------------------------------------- + */ + +int flash_erase (flash_info_t * info, int s_first, int s_last) +{ + volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *) (info->start[0]); + volatile FLASH_WORD_SIZE *addr2; + int flag, prot, sect, l_sect; + int i; + + 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_UNKNOWN) { + printf ("Can't erase unknown flash type - 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"); + } + + l_sect = -1; + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect <= s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + addr2 = (FLASH_WORD_SIZE *) (info->start[sect]); + printf ("Erasing sector %p\n", addr2); /* CLH */ + + if ((info->flash_id & FLASH_VENDMASK) == + FLASH_MAN_SST) { + addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; + addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; + addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080; + addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; + addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; + addr2[0] = (FLASH_WORD_SIZE) 0x00500050; /* block erase */ + for (i = 0; i < 50; i++) + udelay (1000); /* wait 1 ms */ + } else { + addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; + addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; + addr[ADDR0] = (FLASH_WORD_SIZE) 0x00800080; + addr[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; + addr[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; + addr2[0] = (FLASH_WORD_SIZE) 0x00300030; /* sector erase */ + } + l_sect = sect; + /* + * Wait for each sector to complete, it's more + * reliable. According to AMD Spec, you must + * issue all erase commands within a specified + * timeout. This has been seen to fail, especially + * if printf()s are included (for debug)!! + */ + wait_for_DQ7 (info, sect); + } + } + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + + /* wait at least 80us - let's wait 1 ms */ + udelay (1000); + +#if 0 + /* + * We wait for the last triggered sector + */ + if (l_sect < 0) + goto DONE; + wait_for_DQ7 (info, l_sect); + +DONE: +#endif + /* reset to read mode */ + addr = (FLASH_WORD_SIZE *) info->start[0]; + addr[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */ + + 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) +{ + volatile FLASH_WORD_SIZE *addr2 = + (FLASH_WORD_SIZE *) (info->start[0]); + volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest; + volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data; + ulong start; + int i; + + /* Check if Flash is (sufficiently) erased */ + if ((*((volatile FLASH_WORD_SIZE *) dest) & + (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) { + return (2); + } + + for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) { + int flag; + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts (); + + addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA; + addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055; + addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0; + + dest2[i] = data2[i]; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts (); + + /* data polling for D7 */ + start = get_timer (0); + while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) != + (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) { + + if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) { + return (1); + } + } + } + + return (0); +} |