/* **===================================================================== ** ** Copyright (C) 2000, 2001, 2002, 2003 ** The LEOX team <team@leox.org>, http://www.leox.org ** ** LEOX.org is about the development of free hardware and software resources ** for system on chip. ** ** Description: U-Boot port on the LEOX's ELPT860 CPU board ** ~~~~~~~~~~~ ** **===================================================================== ** ** 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 ** **===================================================================== */ /* ** Note 1: In this file, you have to provide the following variable: ** ------ ** flash_info_t flash_info[CFG_MAX_FLASH_BANKS] ** 'flash_info_t' structure is defined into 'include/flash.h' ** and defined as extern into 'common/cmd_flash.c' ** ** Note 2: In this file, you have to provide the following functions: ** ------ ** unsigned long flash_init(void) ** called from 'board_init_r()' into 'common/board.c' ** ** void flash_print_info(flash_info_t *info) ** called from 'do_flinfo()' into 'common/cmd_flash.c' ** ** int flash_erase(flash_info_t *info, ** int s_first, ** int s_last) ** called from 'do_flerase()' & 'flash_sect_erase()' into 'common/cmd_flash.c' ** ** int write_buff (flash_info_t *info, ** uchar *src, ** ulong addr, ** ulong cnt) ** called from 'flash_write()' into 'common/cmd_flash.c' */ #include <common.h> #include <mpc8xx.h> #ifndef CFG_ENV_ADDR # define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET) #endif flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ /*----------------------------------------------------------------------- * Internal Functions */ static void flash_get_offsets (ulong base, flash_info_t *info); static ulong flash_get_size (volatile unsigned char *addr, flash_info_t *info); static int write_word (flash_info_t *info, ulong dest, ulong data); static int write_byte (flash_info_t *info, ulong dest, uchar data); /*----------------------------------------------------------------------- */ unsigned long flash_init (void) { volatile immap_t *immap = (immap_t *)CFG_IMMR; volatile memctl8xx_t *memctl = &immap->im_memctl; unsigned long size_b0; int i; /* Init: no FLASHes known */ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { flash_info[i].flash_id = FLASH_UNKNOWN; } /* Static FLASH Bank configuration here - FIXME XXX */ size_b0 = flash_get_size ((volatile unsigned char *)FLASH_BASE0_PRELIM, &flash_info[0]); if ( flash_info[0].flash_id == FLASH_UNKNOWN ) { printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n", size_b0, size_b0<<20); } /* Remap FLASH according to real size */ memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & OR_AM_MSK); memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_PS_8 | BR_V; /* Re-do sizing to get full correct info */ size_b0 = flash_get_size ((volatile unsigned char *)CFG_FLASH_BASE, &flash_info[0]); flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]); #if CFG_MONITOR_BASE >= CFG_FLASH_BASE /* monitor protection ON by default */ flash_protect (FLAG_PROTECT_SET, CFG_MONITOR_BASE, CFG_MONITOR_BASE + monitor_flash_len-1, &flash_info[0]); #endif #ifdef CFG_ENV_IS_IN_FLASH /* ENV protection ON by default */ flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR, CFG_ENV_ADDR + CFG_ENV_SIZE-1, &flash_info[0]); #endif flash_info[0].size = size_b0; return (size_b0); } /*----------------------------------------------------------------------- */ static void flash_get_offsets (ulong base, flash_info_t *info) { int i; #define SECTOR_64KB 0x00010000 /* set up sector start adress table */ for (i = 0; i < info->sector_count; i++) { info->start[i] = base + (i * SECTOR_64KB); } } /*----------------------------------------------------------------------- */ 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_STM: printf ("STM (Thomson) "); break; default: printf ("Unknown Vendor "); break; } switch ( info->flash_id & FLASH_TYPEMASK ) { case FLASH_AM040: printf ("AM29F040 (4 Mbits)\n"); break; default: printf ("Unknown Chip Type\n"); break; } printf (" Size: %ld KB in %d Sectors\n", info->size >> 10, 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"); return; } /*----------------------------------------------------------------------- */ /*----------------------------------------------------------------------- */ /* * The following code cannot be run from FLASH! */ static ulong flash_get_size (volatile unsigned char *addr, flash_info_t *info) { short i; uchar value; ulong base = (ulong)addr; /* Write auto select command: read Manufacturer ID */ addr[0x0555] = 0xAA; addr[0x02AA] = 0x55; addr[0x0555] = 0x90; value = addr[0]; switch ( value ) { /* case AMD_MANUFACT: */ case 0x01: info->flash_id = FLASH_MAN_AMD; break; /* case FUJ_MANUFACT: */ case 0x04: info->flash_id = FLASH_MAN_FUJ; break; /* case STM_MANUFACT: */ case 0x20: info->flash_id = FLASH_MAN_STM; break; default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; return (0); /* no or unknown flash */ } value = addr[1]; /* device ID */ switch ( value ) { case STM_ID_F040B: case AMD_ID_F040B: info->flash_id += FLASH_AM040; /* 4 Mbits = 512k * 8 */ info->sector_count = 8; info->size = 0x00080000; break; default: info->flash_id = FLASH_UNKNOWN; return (0); /* => no or unknown flash */ } /* set up sector start adress table */ for (i = 0; i < info->sector_count; i++) { info->start[i] = base + (i * 0x00010000); } /* 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 */ addr = (volatile unsigned char *)(info->start[i]); info->protect[i] = addr[2] & 1; } /* * Prevent writes to uninitialized FLASH. */ if ( info->flash_id != FLASH_UNKNOWN ) { addr = (volatile unsigned char *)info->start[0]; *addr = 0xF0; /* reset bank */ } return (info->size); } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t *info, int s_first, int s_last) { volatile unsigned char *addr = (volatile unsigned char *)(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(); addr[0x0555] = 0xAA; addr[0x02AA] = 0x55; addr[0x0555] = 0x80; addr[0x0555] = 0xAA; addr[0x02AA] = 0x55; /* Start erase on unprotected sectors */ for (sect = s_first; sect<=s_last; sect++) { if (info->protect[sect] == 0) /* not protected */ { addr = (volatile unsigned char *)(info->start[sect]); addr[0] = 0x30; 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 = (volatile unsigned char *)(info->start[l_sect]); while ( (addr[0] & 0x80) != 0x80 ) { if ( (now = get_timer(start)) > CFG_FLASH_ERASE_TOUT ) { printf ("Timeout\n"); return ( 1 ); } /* show that we're waiting */ if ( (now - last) > 1000 ) /* every second */ { putc ('.'); last = now; } } DONE: /* reset to read mode */ addr = (volatile unsigned char *)info->start[0]; addr[0] = 0xF0; /* reset bank */ 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; uchar bdata; int i, l, rc; if ( (info->flash_id & FLASH_TYPEMASK) == FLASH_AM040 ) { /* Width of the data bus: 8 bits */ wp = addr; while ( cnt ) { bdata = *src++; if ( (rc = write_byte(info, wp, bdata)) != 0 ) { return (rc); } ++wp; --cnt; } return ( 0 ); } else { /* Width of the data bus: 32 bits */ 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) { vu_long *addr = (vu_long*)(info->start[0]); ulong start; int flag; /* Check if Flash is (sufficiently) erased */ if ( (*((vu_long *)dest) & data) != data ) { return (2); } /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); addr[0x0555] = 0x00AA00AA; addr[0x02AA] = 0x00550055; addr[0x0555] = 0x00A000A0; *((vu_long *)dest) = data; /* re-enable interrupts if necessary */ if ( flag ) enable_interrupts(); /* data polling for D7 */ start = get_timer (0); while ( (*((vu_long *)dest) & 0x00800080) != (data & 0x00800080) ) { if ( get_timer(start) > CFG_FLASH_WRITE_TOUT ) { return (1); } } return (0); } /*----------------------------------------------------------------------- * Write a byte to Flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ static int write_byte (flash_info_t *info, ulong dest, uchar data) { volatile unsigned char *addr = (volatile unsigned char *)(info->start[0]); ulong start; int flag; /* Check if Flash is (sufficiently) erased */ if ( (*((volatile unsigned char *)dest) & data) != data ) { return (2); } /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); addr[0x0555] = 0xAA; addr[0x02AA] = 0x55; addr[0x0555] = 0xA0; *((volatile unsigned char *)dest) = data; /* re-enable interrupts if necessary */ if ( flag ) enable_interrupts(); /* data polling for D7 */ start = get_timer (0); while ( (*((volatile unsigned char *)dest) & 0x80) != (data & 0x80) ) { if ( get_timer(start) > CFG_FLASH_WRITE_TOUT ) { return (1); } } return (0); } /*----------------------------------------------------------------------- */