/* * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Alex Zuepke <azu@sysgo.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 <common.h> ulong myflush (void); #define FLASH_BANK_SIZE PHYS_FLASH_SIZE #define MAIN_SECT_SIZE 0x10000 /* 64 KB */ flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; #define CMD_READ_ARRAY 0x000000F0 #define CMD_UNLOCK1 0x000000AA #define CMD_UNLOCK2 0x00000055 #define CMD_ERASE_SETUP 0x00000080 #define CMD_ERASE_CONFIRM 0x00000030 #define CMD_PROGRAM 0x000000A0 #define CMD_UNLOCK_BYPASS 0x00000020 #define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555 << 1))) #define MEM_FLASH_ADDR2 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA << 1))) #define BIT_ERASE_DONE 0x00000080 #define BIT_RDY_MASK 0x00000080 #define BIT_PROGRAM_ERROR 0x00000020 #define BIT_TIMEOUT 0x80000000 /* our flag */ #define READY 1 #define ERR 2 #define TMO 4 /*----------------------------------------------------------------------- */ 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 = #if defined(CONFIG_AMD_LV400) (AMD_MANUFACT & FLASH_VENDMASK) | (AMD_ID_LV400B & FLASH_TYPEMASK); #elif defined(CONFIG_AMD_LV800) (AMD_MANUFACT & FLASH_VENDMASK) | (AMD_ID_LV800B & FLASH_TYPEMASK); #else #error "Unknown flash configured" #endif 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++) { if (j <= 3) { /* 1st one is 16 KB */ if (j == 0) { flash_info[i].start[j] = flashbase + 0; } /* 2nd and 3rd are both 8 KB */ if ((j == 1) || (j == 2)) { flash_info[i].start[j] = flashbase + 0x4000 + (j - 1) * 0x2000; } /* 4th 32 KB */ if (j == 3) { flash_info[i].start[j] = flashbase + 0x8000; } } else { flash_info[i].start[j] = flashbase + (j - 3) * MAIN_SECT_SIZE; } } size += flash_info[i].size; } 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 (AMD_MANUFACT & FLASH_VENDMASK): printf ("AMD: "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case (AMD_ID_LV400B & FLASH_TYPEMASK): printf ("1x Amd29LV400BB (4Mbit)\n"); break; case (AMD_ID_LV800B & FLASH_TYPEMASK): printf ("1x Amd29LV800BB (8Mbit)\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:; } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t * info, int s_first, int s_last) { ushort result; int iflag, cflag, prot, sect; int rc = ERR_OK; int chip; /* first look for protection bits */ if (info->flash_id == FLASH_UNKNOWN) return ERR_UNKNOWN_FLASH_TYPE; if ((s_first < 0) || (s_first > s_last)) { return ERR_INVAL; } if ((info->flash_id & FLASH_VENDMASK) != (AMD_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. */ cflag = icache_status (); icache_disable (); iflag = disable_interrupts (); /* Start erase on unprotected sectors */ for (sect = s_first; sect <= s_last && !ctrlc (); sect++) { printf ("Erasing sector %2d ... ", sect); /* arm simple, non interrupt dependent timer */ reset_timer_masked (); if (info->protect[sect] == 0) { /* not protected */ vu_short *addr = (vu_short *) (info->start[sect]); MEM_FLASH_ADDR1 = CMD_UNLOCK1; MEM_FLASH_ADDR2 = CMD_UNLOCK2; MEM_FLASH_ADDR1 = CMD_ERASE_SETUP; MEM_FLASH_ADDR1 = CMD_UNLOCK1; MEM_FLASH_ADDR2 = CMD_UNLOCK2; *addr = CMD_ERASE_CONFIRM; /* wait until flash is ready */ chip = 0; do { result = *addr; /* check timeout */ if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) { MEM_FLASH_ADDR1 = CMD_READ_ARRAY; chip = TMO; break; } if (!chip && (result & 0xFFFF) & BIT_ERASE_DONE) chip = READY; if (!chip && (result & 0xFFFF) & BIT_PROGRAM_ERROR) chip = ERR; } while (!chip); MEM_FLASH_ADDR1 = CMD_READ_ARRAY; if (chip == ERR) { rc = ERR_PROG_ERROR; goto outahere; } if (chip == TMO) { rc = ERR_TIMOUT; goto outahere; } printf ("ok.\n"); } else { /* it was protected */ printf ("protected!\n"); } } if (ctrlc ()) printf ("User Interrupt!\n"); outahere: /* allow flash to settle - wait 10 ms */ udelay_masked (10000); if (iflag) enable_interrupts (); if (cflag) icache_enable (); return rc; } /*----------------------------------------------------------------------- * Copy memory to flash */ static int write_hword (flash_info_t * info, ulong dest, ushort data) { vu_short *addr = (vu_short *) dest; ushort result; int rc = ERR_OK; int cflag, iflag; int chip; /* * Check if Flash is (sufficiently) erased */ result = *addr; if ((result & data) != data) return ERR_NOT_ERASED; /* * 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. */ cflag = icache_status (); icache_disable (); iflag = disable_interrupts (); MEM_FLASH_ADDR1 = CMD_UNLOCK1; MEM_FLASH_ADDR2 = CMD_UNLOCK2; MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS; *addr = CMD_PROGRAM; *addr = data; /* arm simple, non interrupt dependent timer */ reset_timer_masked (); /* wait until flash is ready */ chip = 0; do { result = *addr; /* check timeout */ if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) { chip = ERR | TMO; break; } if (!chip && ((result & 0x80) == (data & 0x80))) chip = READY; if (!chip && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) { result = *addr; if ((result & 0x80) == (data & 0x80)) chip = READY; else chip = ERR; } } while (!chip); *addr = CMD_READ_ARRAY; if (chip == ERR || *addr != data) rc = ERR_PROG_ERROR; if (iflag) enable_interrupts (); if (cflag) icache_enable (); return rc; } /*----------------------------------------------------------------------- * Copy memory to flash. */ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) { ulong cp, wp; int l; int i, rc; ushort data; wp = (addr & ~1); /* 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 << 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_hword (info, wp, data)) != 0) { return (rc); } wp += 2; } /* * handle word aligned part */ while (cnt >= 2) { data = *((vu_short *) src); if ((rc = write_hword (info, wp, data)) != 0) { return (rc); } src += 2; wp += 2; cnt -= 2; } if (cnt == 0) { 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_hword (info, wp, data); }