/* * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH * Marius Groeger * * (C) Copyright 2005 Rowel Atienza * Flash driver for armadillo board HT1070 * * 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 #define FLASH_BANK_SIZE 0x400000 /*value used by hermit is 0x200*/ /*document says sector size is either 64k in low mem reg and 8k in high mem reg*/ #define MAIN_SECT_SIZE 0x10000 #define UNALIGNED_MASK (3) #define FL_WORD(addr) (*(volatile unsigned short*)(addr)) #define FLASH_TIMEOUT 20000000 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /*----------------------------------------------------------------------- */ ulong flash_init (void) { int i, j; ulong size = 0; for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) { ulong flashbase = 0; flash_info[i].flash_id = (FUJ_MANUFACT & FLASH_VENDMASK); /*(INTEL_ID_28F128J3 & FLASH_TYPEMASK); */ flash_info[i].size = FLASH_BANK_SIZE; flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT; memset (flash_info[i].protect, 0, CONFIG_SYS_MAX_FLASH_SECT); if (i == 0) flashbase = PHYS_FLASH_1; else panic ("configured too many flash banks!\n"); for (j = 0; j < flash_info[i].sector_count; j++) { flash_info[i].start[j] = flashbase + j * MAIN_SECT_SIZE; } size += flash_info[i].size; } /* Protect monitor and environment sectors */ flash_protect (FLAG_PROTECT_SET, CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]); flash_protect (FLAG_PROTECT_SET, CONFIG_ENV_ADDR, CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]); return size; } /*----------------------------------------------------------------------- */ void flash_print_info (flash_info_t * info) { int i; switch (info->flash_id & FLASH_VENDMASK) { case (FUJ_MANUFACT & FLASH_VENDMASK): printf ("Fujitsu: "); break; default: printf ("Unknown Vendor "); break; } /* switch (info->flash_id & FLASH_TYPEMASK) { case (INTEL_ID_28F128J3 & FLASH_TYPEMASK): printf ("28F128J3 (128Mbit)\n"); break; default: printf ("Unknown Chip Type\n"); goto Done; 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"); /* Done: ; */ } /* * * Loop until both write state machines complete. * */ static unsigned short flash_status_wait (unsigned long addr, unsigned short value) { unsigned short status; long timeout = FLASH_TIMEOUT; while (((status = (FL_WORD (addr))) != value) && timeout > 0) { timeout--; } return status; } /* * Loop until the Write State machine is ready, then do a full error * check. Clear status and leave the flash in Read Array mode; return * 0 for no error, -1 for error. */ static int flash_status_full_check (unsigned long addr, unsigned short value1, unsigned short value2) { unsigned short status1, status2; status1 = flash_status_wait (addr, value1); status2 = flash_status_wait (addr + 2, value2); return (status1 != value1 || status2 != value2) ? -1 : 0; } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t * info, int s_first, int s_last) { int flag, prot, sect; int rc = ERR_OK; unsigned long base; unsigned long addr; if ((info->flash_id & FLASH_VENDMASK) != (FUJ_MANUFACT & FLASH_VENDMASK)) { return ERR_UNKNOWN_FLASH_VENDOR; } prot = 0; for (sect = s_first; sect <= s_last; ++sect) { if (info->protect[sect]) { prot++; } } if (prot) return ERR_PROTECTED; /* * Disable interrupts which might cause a timeout * here. Remember that our exception vectors are * at address 0 in the flash, and we don't want a * (ticker) exception to happen while the flash * chip is in programming mode. */ flag = disable_interrupts (); printf ("Erasing %d sectors starting at sector %2d.\n" "This make take some time ... ", s_last - s_first, sect); /* Start erase on unprotected sectors */ for (sect = s_first; sect <= s_last && !ctrlc (); sect++) { /* ARM simple, non interrupt dependent timer */ reset_timer_masked (); if (info->protect[sect] == 0) { /* not protected */ addr = sect * MAIN_SECT_SIZE; addr &= ~(unsigned long) UNALIGNED_MASK; /* word align */ base = addr & 0xF0000000; FL_WORD (base + (0x555 << 1)) = 0xAA; FL_WORD (base + (0x2AA << 1)) = 0x55; FL_WORD (base + (0x555 << 1)) = 0x80; FL_WORD (base + (0x555 << 1)) = 0xAA; FL_WORD (base + (0x2AA << 1)) = 0x55; FL_WORD (addr) = 0x30; if (flash_status_full_check (addr, 0xFFFF, 0xFFFF)) return ERR_PROTECTED; } } printf ("\nDone.\n"); if (ctrlc ()) printf ("User Interrupt!\n"); /* allow flash to settle - wait 10 ms */ udelay_masked (10000); if (flag) enable_interrupts (); return rc; } /*----------------------------------------------------------------------- * Copy memory to flash */ static int write_word (flash_info_t * info, ulong dest, ushort data) { int flag; unsigned long base; /* Check if Flash is (sufficiently) erased */ if ((FL_WORD (dest) & data) != data) return ERR_NOT_ERASED; /*if(dest & UNALIGNED_MASK) return ERR_ALIGN; */ /* * Disable interrupts which might cause a timeout * here. Remember that our exception vectors are * at address 0 in the flash, and we don't want a * (ticker) exception to happen while the flash * chip is in programming mode. */ flag = disable_interrupts (); /* arm simple, non interrupt dependent timer */ reset_timer_masked (); base = dest & 0xF0000000; FL_WORD (base + (0x555 << 1)) = 0xAA; FL_WORD (base + (0x2AA << 1)) = 0x55; FL_WORD (base + (0x555 << 1)) = 0xA0; FL_WORD (dest) = data; /*printf("writing 0x%p = 0x%x\n",dest,data); */ if (flash_status_wait (dest, data) != data) return ERR_PROG_ERROR; if (flag) enable_interrupts (); return ERR_OK; } /*----------------------------------------------------------------------- * Copy memory to flash. */ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) { ulong cp, wp; ushort data; int l; int i, rc; wp = (addr & ~1); /* get lower word aligned address */ printf ("Writing %lu short data to 0x%lx from 0x%p.\n ", cnt, wp, src); /* * 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 << 8); } for (; i < 2 && cnt > 0; ++i) { data = (data >> 8) | (*src++ << 8); --cnt; ++cp; } for (; cnt == 0 && i < 2; ++i, ++cp) { data = (data >> 8) | (*(uchar *) cp << 8); } if ((rc = write_word (info, wp, data)) != 0) { return (rc); } wp += 2; } /* * handle word aligned part */ while (cnt >= 2) { data = *((vu_short *) src); if ((rc = write_word (info, wp, data)) != 0) { return (rc); } src += 2; wp += 2; cnt -= 2; } if (cnt == 0) { printf ("\nDone.\n"); return ERR_OK; } /* * handle unaligned tail bytes */ data = 0; for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) { data = (data >> 8) | (*src++ << 8); --cnt; } for (; i < 2; ++i, ++cp) { data = (data >> 8) | (*(uchar *) cp << 8); } return write_word (info, wp, data); }