/* * Basic Flash Driver for Freescale MCF 5281/5282 internal FLASH * * (C) Copyright 2005 BuS Elektronik GmbH & Co.KG <esw@bus-elektonik.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> #include <asm/m5282.h> #include "cfm_flash.h" #if defined(CONFIG_M5281) || defined(CONFIG_M5282) #if (CFG_CLK>20000000) #define CFM_CLK (((long) CFG_CLK / (400000 * 8) + 1) | 0x40) #else #define CFM_CLK ((long) CFG_CLK / 400000 + 1) #endif #define cmf_backdoor_address(addr) (((addr) & 0x0007FFFF) | 0x04000000 | \ (CFG_MBAR & 0xC0000000)) void cfm_flash_print_info (flash_info_t * info) { printf ("Freescale: "); switch (info->flash_id & FLASH_TYPEMASK) { case FREESCALE_ID_MCF5281 & FLASH_TYPEMASK: printf ("MCF5281 internal FLASH\n"); break; case FREESCALE_ID_MCF5282 & FLASH_TYPEMASK: printf ("MCF5282 internal FLASH\n"); break; default: printf ("Unknown Chip Type\n"); break; } } void cfm_flash_init (flash_info_t * info) { int sector; ulong protection; MCFCFM_MCR = 0; MCFCFM_CLKD = CFM_CLK; debug ("CFM Clock divider: %ld (%d Hz @ %ld Hz)\n",CFM_CLK,\ CFG_CLK / (2* ((CFM_CLK & 0x3F)+1) * (1+((CFM_CLK & 0x40)>>6)*7)),\ CFG_CLK); MCFCFM_SACC = 0; MCFCFM_DACC = 0; if (MCFCFM_SEC & MCFCFM_SEC_KEYEN) puts("CFM backdoor access is enabled\n"); if (MCFCFM_SEC & MCFCFM_SEC_SECSTAT) puts("CFM securety is enabled\n"); #ifdef CONFIG_M5281 info->flash_id = (FREESCALE_MANUFACT & FLASH_VENDMASK) | (FREESCALE_ID_MCF5281 & FLASH_TYPEMASK); info->size = 256*1024; info->sector_count = 16; #else info->flash_id = (FREESCALE_MANUFACT & FLASH_VENDMASK) | (FREESCALE_ID_MCF5282 & FLASH_TYPEMASK); info->size = 512*1024; info->sector_count = 32; #endif protection = MCFCFM_PROT; for (sector = 0; sector < info->sector_count; sector++) { if (sector == 0) { info->start[sector] = CFG_INT_FLASH_BASE; } else { info->start[sector] = info->start[sector-1] + 0x04000; } info->protect[sector] = protection & 1; protection >>= 1; } } int cfm_flash_readycheck(int checkblank) { int rc; unsigned char state; rc = ERR_OK; while (!(MCFCFM_USTAT & MCFCFM_USTAT_CCIF)); state = MCFCFM_USTAT; if (state & MCFCFM_USTAT_ACCERR) { debug ("%s(): CFM access error",__FUNCTION__); rc = ERR_PROG_ERROR; } if (state & MCFCFM_USTAT_PVIOL) { debug ("%s(): CFM protection violation",__FUNCTION__); rc = ERR_PROTECTED; } if (checkblank) { if (!(state & MCFCFM_USTAT_BLANK)) { debug ("%s(): CFM erras error",__FUNCTION__); rc = ERR_NOT_ERASED; } } MCFCFM_USTAT = state & 0x34; /* reset state */ return rc; } /* Erase 16KiB = 8 2KiB pages */ int cfm_flash_erase_sector (flash_info_t * info, int sector) { ulong address; int page; int rc; rc= ERR_OK; address = cmf_backdoor_address(info->start[sector]); for (page=0; (page<8) && (rc==ERR_OK); page++) { *(volatile __u32*) address = 0; MCFCFM_CMD = MCFCFM_CMD_PGERS; MCFCFM_USTAT = MCFCFM_USTAT_CBEIF; rc = cfm_flash_readycheck(0); if (rc==ERR_OK) { *(volatile __u32*) address = 0; MCFCFM_CMD = MCFCFM_CMD_PGERSVER; MCFCFM_USTAT = MCFCFM_USTAT_CBEIF; rc = cfm_flash_readycheck(1); } address += 0x800; } return rc; } int cfm_flash_write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) { int rc; ulong dest, data; rc = ERR_OK; if (addr & 3) { debug ("Byte and Word alignment not supported\n"); rc = ERR_ALIGN; } if (cnt & 3) { debug ("Byte and Word transfer not supported\n"); rc = ERR_ALIGN; } dest = cmf_backdoor_address(addr); while ((cnt>=4) && (rc == ERR_OK)) { data =*((volatile u32 *) src); *(volatile u32*) dest = data; MCFCFM_CMD = MCFCFM_CMD_PGM; MCFCFM_USTAT = MCFCFM_USTAT_CBEIF; rc = cfm_flash_readycheck(0); if (*(volatile u32*) addr != data) rc = ERR_PROG_ERROR; src +=4; dest +=4; addr +=4; cnt -=4; } return rc; } #ifdef CFG_FLASH_PROTECTION int cfm_flash_protect(flash_info_t * info,long sector,int prot) { int rc; rc= ERR_OK; if (prot) { MCFCFM_PROT |= (1<<sector); info->protect[sector]=1; } else { MCFCFM_PROT &= ~(1<<sector); info->protect[sector]=0; } return rc; } #endif #endif