/* * (C) Copyright 2001 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc. * * (C) Copyright 2002 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * Adapted for Interphase 4539 by Wolfgang Grandegger <wg@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 <config.h> #include <common.h> #include <flash.h> #include <asm/io.h> flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; extern int hwc_flash_size(void); static ulong flash_get_size (u32 addr, flash_info_t *info); static int flash_get_offsets (u32 base, flash_info_t *info); static int write_word (flash_info_t *info, ulong dest, ulong data); static void flash_reset (u32 addr); #define out8(a,v) *(volatile unsigned char*)(a) = v #define in8(a) *(volatile unsigned char*)(a) #define in32(a) *(volatile unsigned long*)(a) #define iobarrier_rw() eieio() unsigned long flash_init (void) { unsigned int i; unsigned long flash_size = 0; unsigned long bank_size; unsigned int bank = 0; /* Init: no FLASHes known */ for (i=0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) { flash_info[i].flash_id = FLASH_UNKNOWN; flash_info[i].sector_count = 0; flash_info[i].size = 0; } /* Initialise the BOOT Flash */ if (bank == CONFIG_SYS_MAX_FLASH_BANKS) { puts ("Warning: not all Flashes are initialised !"); return flash_size; } bank_size = flash_get_size (CONFIG_SYS_FLASH_BASE, flash_info + bank); if (bank_size) { #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE && \ CONFIG_SYS_MONITOR_BASE < CONFIG_SYS_FLASH_BASE + CONFIG_SYS_MAX_FLASH_SIZE /* monitor protection ON by default */ flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, flash_info + bank); #endif #ifdef CONFIG_ENV_IS_IN_FLASH /* ENV protection ON by default */ flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR, CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1, flash_info + bank); #endif /* HWC protection ON by default */ flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE + 0x10000 - 1, flash_info + bank); flash_size += bank_size; bank++; } else { puts ("Warning: the BOOT Flash is not initialised !"); } return flash_size; } /* * The following code cannot be run from FLASH! */ static ulong flash_get_size (u32 addr, flash_info_t *info) { volatile uchar value; #if 0 int i; #endif /* Write auto select command: read Manufacturer ID */ out8(addr + 0x0555, 0xAA); iobarrier_rw(); udelay(10); out8(addr + 0x02AA, 0x55); iobarrier_rw(); udelay(10); out8(addr + 0x0555, 0x90); iobarrier_rw(); udelay(10); value = in8(addr); iobarrier_rw(); udelay(10); switch (value | (value << 16)) { 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; flash_reset (addr); return 0; } value = in8(addr + 1); /* device ID */ iobarrier_rw(); switch (value) { case AMD_ID_LV033C: info->flash_id += FLASH_AM033C; info->size = hwc_flash_size(); if (info->size > CONFIG_SYS_MAX_FLASH_SIZE) { printf("U-Boot supports only %d MB\n", CONFIG_SYS_MAX_FLASH_SIZE); info->size = CONFIG_SYS_MAX_FLASH_SIZE; } info->sector_count = info->size / 0x10000; break; /* => 4 MB */ default: info->flash_id = FLASH_UNKNOWN; flash_reset (addr); return (0); /* => no or unknown flash */ } if (!flash_get_offsets (addr, info)) { flash_reset (addr); return 0; } #if 0 /* 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 */ value = in8(info->start[i] + 2); iobarrier_rw(); info->protect[i] = (value & 1) != 0; } #endif /* * Reset bank to read mode */ flash_reset (addr); return (info->size); } static int flash_get_offsets (u32 base, flash_info_t *info) { unsigned int i, size; switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_AM033C: /* set sector offsets for uniform sector type */ size = info->size / info->sector_count; for (i = 0; i < info->sector_count; i++) { info->start[i] = base + i * size; } break; default: return 0; } return 1; } int flash_erase (flash_info_t *info, int s_first, int s_last) { volatile u32 addr = info->start[0]; 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; } if (info->flash_id == FLASH_UNKNOWN || info->flash_id > FLASH_AMD_COMP) { 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"); } l_sect = -1; /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); out8(addr + 0x555, 0xAA); iobarrier_rw(); out8(addr + 0x2AA, 0x55); iobarrier_rw(); out8(addr + 0x555, 0x80); iobarrier_rw(); out8(addr + 0x555, 0xAA); iobarrier_rw(); out8(addr + 0x2AA, 0x55); iobarrier_rw(); /* Start erase on unprotected sectors */ for (sect = s_first; sect<=s_last; sect++) { if (info->protect[sect] == 0) { /* not protected */ addr = info->start[sect]; out8(addr, 0x30); iobarrier_rw(); 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; addr = info->start[l_sect]; while ((in8(addr) & 0x80) != 0x80) { 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; } iobarrier_rw(); } DONE: /* reset to read mode */ flash_reset (info->start[0]); 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 u32 addr = info->start[0]; ulong start; int flag, i; /* Check if Flash is (sufficiently) erased */ if ((in32(dest) & data) != data) { return (2); } /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); /* first, perform an unlock bypass command to speed up flash writes */ out8(addr + 0x555, 0xAA); iobarrier_rw(); out8(addr + 0x2AA, 0x55); iobarrier_rw(); out8(addr + 0x555, 0x20); iobarrier_rw(); /* write each byte out */ for (i = 0; i < 4; i++) { char *data_ch = (char *)&data; out8(addr, 0xA0); iobarrier_rw(); out8(dest+i, data_ch[i]); iobarrier_rw(); udelay(10); /* XXX */ } /* we're done, now do an unlock bypass reset */ out8(addr, 0x90); iobarrier_rw(); out8(addr, 0x00); iobarrier_rw(); /* re-enable interrupts if necessary */ if (flag) enable_interrupts(); /* data polling for D7 */ start = get_timer (0); while ((in32(dest) & 0x80808080) != (data & 0x80808080)) { if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { return (1); } iobarrier_rw(); } flash_reset (addr); return (0); } /* * Reset bank to read mode */ static void flash_reset (u32 addr) { out8(addr, 0xF0); /* reset bank */ iobarrier_rw(); } 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; case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_AM033C: printf ("AM29LV033C (32 Mbit, uniform sectors)\n"); break; default: printf ("Unknown Chip Type\n"); break; } if (info->size % 0x100000 == 0) { printf (" Size: %ld MB in %d Sectors\n", info->size / 0x100000, info->sector_count); } else if (info->size % 0x400 == 0) { printf (" Size: %ld KB in %d Sectors\n", info->size / 0x400, info->sector_count); } else { printf (" Size: %ld B in %d Sectors\n", info->size, 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"); }