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Diffstat (limited to 'board/ep8260/flash.c')
| -rwxr-xr-x | board/ep8260/flash.c | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/board/ep8260/flash.c b/board/ep8260/flash.c new file mode 100755 index 0000000..278d606 --- /dev/null +++ b/board/ep8260/flash.c @@ -0,0 +1,411 @@ +/* + * (C) Copyright 2001, 2002 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * (C) Copyright 2002 + * Frank Panno <fpanno@delphintech.com>, Delphin Technology AG + * + * Flash Routines for AMD device AM29DL323DB on the EP8260 board. + * + * This file is based on board/tqm8260/flash.c. + *-------------------------------------------------------------------- + * 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> + +#define V_ULONG(a) (*(volatile unsigned long *)( a )) +#define V_BYTE(a) (*(volatile unsigned char *)( a )) + + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; + + +/*----------------------------------------------------------------------- + */ +void flash_reset(void) +{ + if( flash_info[0].flash_id != FLASH_UNKNOWN ) { + V_ULONG( flash_info[0].start[0] ) = 0x00F000F0; + V_ULONG( flash_info[0].start[0] + 4 ) = 0x00F000F0; + } +} + +/*----------------------------------------------------------------------- + */ +ulong flash_get_size( ulong baseaddr, flash_info_t *info ) +{ + short i; + unsigned long flashtest_h, flashtest_l; + + /* Write auto select command sequence and test FLASH answer */ + V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00AA00AA; + V_ULONG(baseaddr + ((ulong)0x02AA << 3)) = 0x00550055; + V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00900090; + V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00AA00AA; + V_ULONG(baseaddr + 4 + ((ulong)0x02AA << 3)) = 0x00550055; + V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00900090; + + flashtest_h = V_ULONG(baseaddr); /* manufacturer ID */ + flashtest_l = V_ULONG(baseaddr + 4); + + if ((int)flashtest_h == AMD_MANUFACT) { + info->flash_id = FLASH_MAN_AMD; + } else { + info->flash_id = FLASH_UNKNOWN; + info->sector_count = 0; + info->size = 0; + return (0); /* no or unknown flash */ + } + + flashtest_h = V_ULONG(baseaddr + 8); /* device ID */ + flashtest_l = V_ULONG(baseaddr + 12); + if (flashtest_h != flashtest_l) { + info->flash_id = FLASH_UNKNOWN; + return(0); + } + + switch((int)flashtest_h) { + case AMD_ID_DL323B: + info->flash_id += FLASH_AMDL323B; + info->sector_count = 71; + info->size = 0x01000000; /* 4 * 4 MB = 16 MB */ + break; + case AMD_ID_LV640U: /* AMDLV640 and AMDLV641 have same ID */ + info->flash_id += FLASH_AMLV640U; + info->sector_count = 128; + info->size = 0x02000000; /* 4 * 8 MB = 32 MB */ + break; + default: + info->flash_id = FLASH_UNKNOWN; + return(0); /* no or unknown flash */ + } + + if(flashtest_h == AMD_ID_LV640U) { + /* set up sector start adress table (uniform sector type) */ + for (i = 0; i < info->sector_count; i++) + info->start[i] = baseaddr + (i * 0x00040000); + } else { + /* set up sector start adress table (bottom sector type) */ + for (i = 0; i < 8; i++) { + info->start[i] = baseaddr + (i * 0x00008000); + } + for (i = 8; i < info->sector_count; i++) { + info->start[i] = baseaddr + (i * 0x00040000) - 0x001C0000; + } + } + /* check for protected sectors */ + for (i = 0; i < info->sector_count; i++) { + /* read sector protection at sector address, (A7 .. A0) = 0x02 */ + if ((V_ULONG( info->start[i] + 16 ) & 0x00010001) || + (V_ULONG( info->start[i] + 20 ) & 0x00010001)) { + info->protect[i] = 1; /* D0 = 1 if protected */ + } else { + info->protect[i] = 0; + } + } + + flash_reset(); + return(info->size); +} + +/*----------------------------------------------------------------------- + */ +unsigned long flash_init (void) +{ + unsigned long size_b0 = 0; + 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 (only one bank) */ + + size_b0 = flash_get_size(CFG_FLASH0_BASE, &flash_info[0]); + if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) { + printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", + size_b0, size_b0>>20); + } + + /* + * protect monitor and environment sectors + */ + +#if CFG_MONITOR_BASE >= CFG_FLASH0_BASE + flash_protect(FLAG_PROTECT_SET, + CFG_MONITOR_BASE, + CFG_MONITOR_BASE+monitor_flash_len-1, + &flash_info[0]); +#endif + +#if (CFG_ENV_IS_IN_FLASH == 1) && defined(CFG_ENV_ADDR) +# ifndef CFG_ENV_SIZE +# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE +# endif + flash_protect(FLAG_PROTECT_SET, + CFG_ENV_ADDR, + CFG_ENV_ADDR + CFG_ENV_SIZE - 1, + &flash_info[0]); +#endif + + return (size_b0); +} + +/*----------------------------------------------------------------------- + */ +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 >> 16) & 0xff) { + case FLASH_MAN_AMD: printf ("AMD "); break; + default: printf ("Unknown Vendor "); break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AMDL323B: printf ("29DL323B (32 M, bottom sector)\n"); + break; + case FLASH_AMLV640U: printf ("29LV640U (64 M, uniform sector)\n"); + break; + default: printf ("Unknown Chip Type\n"); + break; + } + + 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"); + return; +} + +/*----------------------------------------------------------------------- + */ +int flash_erase (flash_info_t *info, int s_first, int s_last) +{ + int flag, prot, sect, l_sect; + ulong start, now, 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; + } + + 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(); + + V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA; + V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055; + V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00800080; + V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA; + V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055; + V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA; + V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055; + V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00800080; + V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA; + V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055; + udelay (1000); + + /* Start erase on unprotected sectors */ + for (sect = s_first; sect<=s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + V_ULONG( info->start[sect] ) = 0x00300030; + V_ULONG( info->start[sect] + 4 ) = 0x00300030; + l_sect = sect; + } + } + + /* 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; + while ((V_ULONG( info->start[l_sect] ) & 0x00800080) != 0x00800080 || + (V_ULONG( info->start[l_sect] + 4 ) & 0x00800080) != 0x00800080) + { + 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 */ + serial_putc ('.'); + last = now; + } + } + + DONE: + /* reset to read mode */ + flash_reset (); + + printf (" done\n"); + return 0; +} + +static int write_dword (flash_info_t *, ulong, unsigned char *); + +/*----------------------------------------------------------------------- + * 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 dp; + static unsigned char bb[8]; + int i, l, rc, cc = cnt; + + dp = (addr & ~7); /* get lower dword aligned address */ + + /* + * handle unaligned start bytes + */ + if ((l = addr - dp) != 0) { + for (i = 0; i < 8; i++) + bb[i] = (i < l || (i-l) >= cc) ? V_BYTE(dp+i) : *src++; + if ((rc = write_dword(info, dp, bb)) != 0) + { + return (rc); + } + dp += 8; + cc -= 8 - l; + } + + /* + * handle word aligned part + */ + while (cc >= 8) { + if ((rc = write_dword(info, dp, src)) != 0) { + return (rc); + } + dp += 8; + src += 8; + cc -= 8; + } + + if (cc <= 0) { + return (0); + } + + /* + * handle unaligned tail bytes + */ + for (i = 0; i < 8; i++) { + bb[i] = (i < cc) ? *src++ : V_BYTE(dp+i); + } + return (write_dword(info, dp, bb)); +} + +/*----------------------------------------------------------------------- + * Write a dword to Flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ +static int write_dword (flash_info_t *info, ulong dest, unsigned char * pdata) +{ + ulong start; + ulong cl = 0, ch =0; + int flag, i; + + for (ch=0, i=0; i < 4; i++) + ch = (ch << 8) + *pdata++; /* high word */ + for (cl=0, i=0; i < 4; i++) + cl = (cl << 8) + *pdata++; /* low word */ + + /* Check if Flash is (sufficiently) erased */ + if ((*((vu_long *)dest) & ch) != ch + ||(*((vu_long *)(dest + 4)) & cl) != cl) + { + return (2); + } + + /* Disable interrupts which might cause a timeout here */ + flag = disable_interrupts(); + + V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA; + V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055; + V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00A000A0; + V_ULONG( dest ) = ch; + V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA; + V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055; + V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00A000A0; + V_ULONG( dest + 4 ) = cl; + + /* re-enable interrupts if necessary */ + if (flag) + enable_interrupts(); + + /* data polling for D7 */ + start = get_timer (0); + while (((V_ULONG( dest ) & 0x00800080) != (ch & 0x00800080)) || + ((V_ULONG( dest + 4 ) & 0x00800080) != (cl & 0x00800080))) { + if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { + return (1); + } + } + return (0); +} |