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Diffstat (limited to 'board/wepep250/flash.c')
| -rw-r--r-- | board/wepep250/flash.c | 324 |
1 files changed, 0 insertions, 324 deletions
diff --git a/board/wepep250/flash.c b/board/wepep250/flash.c deleted file mode 100644 index c6e9171..0000000 --- a/board/wepep250/flash.c +++ /dev/null @@ -1,324 +0,0 @@ -/* - * Copyright (C) 2003 ETC s.r.o. - * - * This code was inspired by Marius Groeger and Kyle Harris code - * available in other board ports for U-Boot - * - * 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 - * - * Written by Peter Figuli <peposh@etc.sk>, 2003. - * - */ - -#include <common.h> -#include "intel.h" - - -/* - * This code should handle CFI FLASH memory device. This code is very - * minimalistic approach without many essential error handling code as well. - * Because U-Boot actually is missing smart handling of FLASH device, - * we just set flash_id to anything else to FLASH_UNKNOW, so common code - * can call us without any restrictions. - * TODO: Add CFI Query, to be able to determine FLASH device. - * TODO: Add error handling code - * NOTE: This code was tested with BUS_WIDTH 4 and ITERLEAVE 2 only, but - * hopefully may work with other configurations. - */ - -#if ( WEP_FLASH_BUS_WIDTH == 1 ) -# define FLASH_BUS vu_char -# define FLASH_BUS_RET u_char -# if ( WEP_FLASH_INTERLEAVE == 1 ) -# define FLASH_CMD( x ) x -# else -# error "With 8bit bus only one chip is allowed" -# endif - - -#elif ( WEP_FLASH_BUS_WIDTH == 2 ) -# define FLASH_BUS vu_short -# define FLASH_BUS_RET u_short -# if ( WEP_FLASH_INTERLEAVE == 1 ) -# define FLASH_CMD( x ) x -# elif ( WEP_FLASH_INTERLEAVE == 2 ) -# define FLASH_CMD( x ) (( x << 8 )| x ) -# else -# error "With 16bit bus only 1 or 2 chip(s) are allowed" -# endif - - -#elif ( WEP_FLASH_BUS_WIDTH == 4 ) -# define FLASH_BUS vu_long -# define FLASH_BUS_RET u_long -# if ( WEP_FLASH_INTERLEAVE == 1 ) -# define FLASH_CMD( x ) x -# elif ( WEP_FLASH_INTERLEAVE == 2 ) -# define FLASH_CMD( x ) (( x << 16 )| x ) -# elif ( WEP_FLASH_INTERLEAVE == 4 ) -# define FLASH_CMD( x ) (( x << 24 )|( x << 16 ) ( x << 8 )| x ) -# else -# error "With 32bit bus only 1,2 or 4 chip(s) are allowed" -# endif - -#else -# error "Flash bus width might be 1,2,4 for 8,16,32 bit configuration" -#endif - - -flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; - -static FLASH_BUS_RET flash_status_reg (void) -{ - - FLASH_BUS *addr = (FLASH_BUS *) 0; - - *addr = FLASH_CMD (CFI_INTEL_CMD_READ_STATUS_REGISTER); - - return *addr; -} - -static int flash_ready (ulong timeout) -{ - int ok = 1; - - reset_timer_masked (); - while ((flash_status_reg () & FLASH_CMD (CFI_INTEL_SR_READY)) != - FLASH_CMD (CFI_INTEL_SR_READY)) { - if (get_timer_masked () > timeout && timeout != 0) { - ok = 0; - break; - } - } - return ok; -} - -#if ( CONFIG_SYS_MAX_FLASH_BANKS != 1 ) -# error "WEP platform has only one flash bank!" -#endif - - -ulong flash_init (void) -{ - int i; - FLASH_BUS address = WEP_FLASH_BASE; - - flash_info[0].size = WEP_FLASH_BANK_SIZE; - flash_info[0].sector_count = CONFIG_SYS_MAX_FLASH_SECT; - flash_info[0].flash_id = INTEL_MANUFACT; - memset (flash_info[0].protect, 0, CONFIG_SYS_MAX_FLASH_SECT); - - for (i = 0; i < CONFIG_SYS_MAX_FLASH_SECT; i++) { - flash_info[0].start[i] = address; -#ifdef WEP_FLASH_UNLOCK - /* Some devices are hw locked after start. */ - *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_LOCK_SETUP); - *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_UNLOCK_BLOCK); - flash_ready (0); - *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY); -#endif - address += WEP_FLASH_SECT_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 WEP_FLASH_BANK_SIZE; -} - -void flash_print_info (flash_info_t * info) -{ - int i; - - printf (" Intel vendor\n"); - 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)) { - printf ("\n"); - } - - printf (" %08lX%s", info->start[i], - info->protect[i] ? " (RO)" : " "); - } - printf ("\n"); -} - - -int flash_erase (flash_info_t * info, int s_first, int s_last) -{ - int flag, non_protected = 0, sector; - int rc = ERR_OK; - - FLASH_BUS *address; - - for (sector = s_first; sector <= s_last; sector++) { - if (!info->protect[sector]) { - non_protected++; - } - } - - if (!non_protected) { - 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 (); - - - /* Start erase on unprotected sectors */ - for (sector = s_first; sector <= s_last && !ctrlc (); sector++) { - if (info->protect[sector]) { - printf ("Protected sector %2d skipping...\n", sector); - continue; - } else { - printf ("Erasing sector %2d ... ", sector); - } - - address = (FLASH_BUS *) (info->start[sector]); - - *address = FLASH_CMD (CFI_INTEL_CMD_BLOCK_ERASE); - *address = FLASH_CMD (CFI_INTEL_CMD_CONFIRM); - if (flash_ready (CONFIG_SYS_FLASH_ERASE_TOUT)) { - *address = FLASH_CMD (CFI_INTEL_CMD_CLEAR_STATUS_REGISTER); - printf ("ok.\n"); - } else { - *address = FLASH_CMD (CFI_INTEL_CMD_SUSPEND); - rc = ERR_TIMOUT; - printf ("timeout! Aborting...\n"); - break; - } - *address = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY); - } - if (ctrlc ()) - printf ("User Interrupt!\n"); - - /* allow flash to settle - wait 10 ms */ - udelay_masked (10000); - if (flag) { - enable_interrupts (); - } - - return rc; -} - -static int write_data (flash_info_t * info, ulong dest, FLASH_BUS data) -{ - FLASH_BUS *address = (FLASH_BUS *) dest; - int rc = ERR_OK; - int flag; - - /* Check if Flash is (sufficiently) erased */ - if ((*address & 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. - */ - - flag = disable_interrupts (); - - *address = FLASH_CMD (CFI_INTEL_CMD_CLEAR_STATUS_REGISTER); - *address = FLASH_CMD (CFI_INTEL_CMD_PROGRAM1); - *address = data; - - if (!flash_ready (CONFIG_SYS_FLASH_WRITE_TOUT)) { - *address = FLASH_CMD (CFI_INTEL_CMD_SUSPEND); - rc = ERR_TIMOUT; - printf ("timeout! Aborting...\n"); - } - - *address = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY); - if (flag) { - enable_interrupts (); - } - - return rc; -} - -int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) -{ - ulong read_addr, write_addr; - FLASH_BUS data; - int i, result = ERR_OK; - - - read_addr = addr & ~(sizeof (FLASH_BUS) - 1); - write_addr = read_addr; - if (read_addr != addr) { - data = 0; - for (i = 0; i < sizeof (FLASH_BUS); i++) { - if (read_addr < addr || cnt == 0) { - data |= *((uchar *) read_addr) << i * 8; - } else { - data |= (*src++) << i * 8; - cnt--; - } - read_addr++; - } - if ((result = write_data (info, write_addr, data)) != ERR_OK) { - return result; - } - write_addr += sizeof (FLASH_BUS); - } - for (; cnt >= sizeof (FLASH_BUS); cnt -= sizeof (FLASH_BUS)) { - if ((result = write_data (info, write_addr, - *((FLASH_BUS *) src))) != ERR_OK) { - return result; - } - write_addr += sizeof (FLASH_BUS); - src += sizeof (FLASH_BUS); - } - if (cnt > 0) { - read_addr = write_addr; - data = 0; - for (i = 0; i < sizeof (FLASH_BUS); i++) { - if (cnt > 0) { - data |= (*src++) << i * 8; - cnt--; - } else { - data |= *((uchar *) read_addr) << i * 8; - } - read_addr++; - } - if ((result = write_data (info, write_addr, data)) != 0) { - return result; - } - } - return ERR_OK; -} |