diff options
Diffstat (limited to 'board/tqm8260')
-rw-r--r-- | board/tqm8260/flash.c | 488 |
1 files changed, 488 insertions, 0 deletions
diff --git a/board/tqm8260/flash.c b/board/tqm8260/flash.c new file mode 100644 index 00000000000..dd7a4cc838e --- /dev/null +++ b/board/tqm8260/flash.c @@ -0,0 +1,488 @@ +/* + * (C) Copyright 2001, 2002 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * Flash Routines for AMD devices on the TQM8260 board + * + *-------------------------------------------------------------------- + * 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); + + switch ((int) flashtest_h) { + case AMD_MANUFACT: + info->flash_id = FLASH_MAN_AMD; + break; + case FUJ_MANUFACT: + info->flash_id = FLASH_MAN_FUJ; + break; + default: + 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; + } else { + switch (flashtest_h) { + case AMD_ID_LV800T: + info->flash_id += FLASH_AM800T; + info->sector_count = 19; + info->size = 0x00400000; + break; /* 4 * 1 MB = 4 MB */ + case AMD_ID_LV800B: + info->flash_id += FLASH_AM800B; + info->sector_count = 19; + info->size = 0x00400000; + break; /* 4 * 1 MB = 4 MB */ + case AMD_ID_LV160T: + info->flash_id += FLASH_AM160T; + info->sector_count = 35; + info->size = 0x00800000; + break; /* 4 * 2 MB = 8 MB */ + case AMD_ID_LV160B: + info->flash_id += FLASH_AM160B; + info->sector_count = 35; + info->size = 0x00800000; + break; /* 4 * 2 MB = 8 MB */ + case AMD_ID_DL322T: + info->flash_id += FLASH_AMDL322T; + info->sector_count = 71; + info->size = 0x01000000; + break; /* 4 * 4 MB = 16 MB */ + case AMD_ID_DL322B: + info->flash_id += FLASH_AMDL322B; + info->sector_count = 71; + info->size = 0x01000000; + break; /* 4 * 4 MB = 16 MB */ + case AMD_ID_DL323T: + info->flash_id += FLASH_AMDL323T; + info->sector_count = 71; + info->size = 0x01000000; + break; /* 4 * 4 MB = 16 MB */ + case AMD_ID_DL323B: + info->flash_id += FLASH_AMDL323B; + info->sector_count = 71; + info->size = 0x01000000; + break; /* 4 * 4 MB = 16 MB */ + case AMD_ID_LV640U: + info->flash_id += FLASH_AM640U; + info->sector_count = 128; + info->size = 0x02000000; + break; /* 4 * 8 MB = 32 MB */ + 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 if (info->flash_id & FLASH_BTYPE) { + + /* set up sector start adress table (bottom sector type) */ + info->start[0] = baseaddr + 0x00000000; + info->start[1] = baseaddr + 0x00010000; + info->start[2] = baseaddr + 0x00018000; + info->start[3] = baseaddr + 0x00020000; + for (i = 4; i < info->sector_count; i++) { + info->start[i] = baseaddr + (i * 0x00040000) - 0x000C0000; + } + + } else { + + /* set up sector start adress table (top sector type) */ + i = info->sector_count - 1; + info->start[i--] = baseaddr + info->size - 0x00010000; + info->start[i--] = baseaddr + info->size - 0x00018000; + info->start[i--] = baseaddr + info->size - 0x00020000; + for (; i >= 0; i--) { + info->start[i] = baseaddr + i * 0x00040000; + } + } + + /* 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 + CFG_MONITOR_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 & FLASH_VENDMASK) { + case FLASH_MAN_AMD: + printf ("AMD "); + break; + case FLASH_MAN_FUJ: + printf ("FUJITSU "); + break; + default: + printf ("Unknown Vendor "); + break; + } + + switch (info->flash_id & FLASH_TYPEMASK) { + case FLASH_AM800T: + printf ("29LV800T (8 M, top sector)\n"); + break; + case FLASH_AM800B: + printf ("29LV800T (8 M, bottom sector)\n"); + break; + case FLASH_AM160T: + printf ("29LV160T (16 M, top sector)\n"); + break; + case FLASH_AM160B: + printf ("29LV160B (16 M, bottom sector)\n"); + break; + case FLASH_AMDL322T: + printf ("29DL322T (32 M, top sector)\n"); + break; + case FLASH_AMDL322B: + printf ("29DL322B (32 M, bottom sector)\n"); + break; + case FLASH_AMDL323T: + printf ("29DL323T (32 M, top sector)\n"); + break; + case FLASH_AMDL323B: + printf ("29DL323B (32 M, bottom sector)\n"); + break; + case FLASH_AM640U: + printf ("29LV640D (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, cl, ch; + 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); +} |