/* * (C) Copyright 2003 * Martin Winistoerfer, martinwinistoerfer@gmx.ch. * * 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 */ /* * File: flash.c * * Discription: This Driver is for 28F320J3A, 28F640J3A and * 28F128J3A Intel flashs working in 16 Bit mode. * They are single bank flashs. * * Most of this code is taken from existing u-boot * source code. */ #include <common.h> #include <mpc5xx.h> #if defined(CONFIG_ENV_IS_IN_FLASH) # ifndef CONFIG_ENV_ADDR # define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET) # endif # ifndef CONFIG_ENV_SIZE # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE # endif # ifndef CONFIG_ENV_SECT_SIZE # define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE # endif #endif #define FLASH_ID_MASK 0xFFFF #define FLASH_BLOCK_SIZE 0x00010000 #define FLASH_CMD_READ_ID 0x0090 #define FLASH_CMD_RESET 0x00ff #define FLASH_CMD_BLOCK_ERASE 0x0020 #define FLASH_CMD_ERASE_CONFIRM 0x00D0 #define FLASH_CMD_CLEAR_STATUS 0x0050 #define FLASH_CMD_SUSPEND_ERASE 0x00B0 #define FLASH_CMD_WRITE 0x0040 #define FLASH_CMD_PROTECT 0x0060 #define FLASH_CMD_PROTECT_SET 0x0001 #define FLASH_CMD_PROTECT_CLEAR 0x00D0 #define FLASH_STATUS_DONE 0x0080 flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* * Local function prototypes */ static ulong flash_get_size (vu_short *addr, flash_info_t *info); static int write_short (flash_info_t *info, ulong dest, ushort data); static void flash_get_offsets (ulong base, flash_info_t *info); /* * Initialize flash */ unsigned long flash_init (void) { unsigned long size_b0; int i; /* Init: no FLASHes known */ for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) { flash_info[i].flash_id = FLASH_UNKNOWN; } /* Static FLASH Bank configuration here - FIXME XXX */ #if 1 debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM); #endif size_b0 = flash_get_size((vu_short *)FLASH_BASE0_PRELIM, &flash_info[0]); if (flash_info[0].flash_id == FLASH_UNKNOWN) { printf ("## Unknown FLASH on Bank 0: " "ID 0x%lx, Size = 0x%08lx = %ld MB\n", flash_info[0].flash_id, size_b0, size_b0<<20); } flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]); flash_info[0].size = size_b0; #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE /* monitor protection ON by default */ flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE, CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1, &flash_info[0]); #endif #ifdef CONFIG_ENV_IS_IN_FLASH /* ENV protection ON by default */ flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR, CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1, &flash_info[0]); #endif return size_b0; } /* * Compute start adress of each sector (block) */ static void flash_get_offsets (ulong base, flash_info_t *info) { int i; if (info->flash_id == FLASH_UNKNOWN) { return; } switch (info->flash_id & FLASH_VENDMASK) { case FLASH_MAN_INTEL: for (i = 0; i < info->sector_count; i++) { info->start[i] = base + i * FLASH_BLOCK_SIZE; } return; default: printf ("Don't know sector offsets for flash type 0x%lx\n", info->flash_id); return; } } /* * Print flash information */ 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_SST: printf ("SST "); break; case FLASH_MAN_STM: printf ("STM "); break; case FLASH_MAN_INTEL: printf ("Intel "); break; case FLASH_MAN_MT: printf ("MT "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_28F320J3A: printf ("28F320J3A (32Mbit) 16-Bit\n"); break; case FLASH_28F640J3A: printf ("28F640J3A (64Mbit) 16-Bit\n"); break; case FLASH_28F128J3A: printf ("28F128J3A (128Mbit) 16-Bit\n"); break; default: printf ("Unknown Chip Type\n"); break; } if (info->size >= (1 << 20)) { i = 20; } else { i = 10; } printf (" Size: %ld %cB in %d Sectors\n", info->size >> i, (i == 20) ? 'M' : 'k', 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; } /* * Get size of flash in bytes. * The following code cannot be run from FLASH! */ static ulong flash_get_size (vu_short *addr, flash_info_t *info) { vu_short value; /* Read Manufacturer ID */ addr[0] = FLASH_CMD_READ_ID; value = addr[0]; switch (value) { case (AMD_MANUFACT & FLASH_ID_MASK): info->flash_id = FLASH_MAN_AMD; break; case (FUJ_MANUFACT & FLASH_ID_MASK): info->flash_id = FLASH_MAN_FUJ; break; case (SST_MANUFACT & FLASH_ID_MASK): info->flash_id = FLASH_MAN_SST; break; case (STM_MANUFACT & FLASH_ID_MASK): info->flash_id = FLASH_MAN_STM; break; case (INTEL_MANUFACT & FLASH_ID_MASK): info->flash_id = FLASH_MAN_INTEL; break; default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; addr[0] = FLASH_CMD_RESET; /* restore read mode */ return (0); /* no or unknown flash */ } value = addr[1]; /* device ID */ switch (value) { case (INTEL_ID_28F320J3A & FLASH_ID_MASK): info->flash_id += FLASH_28F320J3A; info->sector_count = 32; info->size = 0x00400000; break; /* => 32 MBit */ case (INTEL_ID_28F640J3A & FLASH_ID_MASK): info->flash_id += FLASH_28F640J3A; info->sector_count = 64; info->size = 0x00800000; break; /* => 64 MBit */ case (INTEL_ID_28F128J3A & FLASH_ID_MASK): info->flash_id += FLASH_28F128J3A; info->sector_count = 128; info->size = 0x01000000; break; /* => 128 MBit */ default: info->flash_id = FLASH_UNKNOWN; addr[0] = FLASH_CMD_RESET; /* restore read mode */ return (0); /* => no or unknown flash */ } if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) { printf ("** ERROR: sector count %d > max (%d) **\n", info->sector_count, CONFIG_SYS_MAX_FLASH_SECT); info->sector_count = CONFIG_SYS_MAX_FLASH_SECT; } addr[0] = FLASH_CMD_RESET; /* restore read mode */ return (info->size); } /* * Erase unprotected sectors */ int flash_erase (flash_info_t *info, int s_first, int s_last) { int flag, prot, 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_VENDMASK) != FLASH_MAN_INTEL) { printf ("Can erase only Intel flash types - aborted\n"); 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"); } start = get_timer (0); last = start; /* Start erase on unprotected sectors */ for (sect = s_first; sect<=s_last; sect++) { if (info->protect[sect] == 0) { /* not protected */ vu_short *addr = (vu_short *)(info->start[sect]); unsigned long status; /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); #ifdef DEBUG printf("Erase sector %d at start addr 0x%08X", sect, (unsigned int)info->start[sect]); #endif *addr = FLASH_CMD_CLEAR_STATUS; *addr = FLASH_CMD_BLOCK_ERASE; *addr = FLASH_CMD_ERASE_CONFIRM; /* re-enable interrupts if necessary */ if (flag) enable_interrupts(); /* wait at least 80us - let's wait 1 ms */ udelay (1000); while (((status = *addr) & FLASH_STATUS_DONE) != FLASH_STATUS_DONE) { if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { printf("Flash erase timeout at address %lx\n", info->start[sect]); *addr = FLASH_CMD_SUSPEND_ERASE; *addr = FLASH_CMD_RESET; return 1; } /* show that we're waiting */ if ((now - last) > 1000) { /* every second */ putc ('.'); last = now; } } *addr = FLASH_CMD_RESET; } } printf (" done\n"); return 0; } /* * Copy memory to flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased * 4 - Flash not identified */ int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) { ulong cp, wp; ushort data; int i, rc; if (info->flash_id == FLASH_UNKNOWN) { return 4; } wp = (addr & ~1); /* get lower word aligned address */ /* * handle unaligned start byte */ if (addr - wp) { data = 0; data = (data << 8) | *src++; --cnt; if ((rc = write_short(info, wp, data)) != 0) { return (rc); } wp += 2; } /* * handle word aligned part */ while (cnt >= 2) { data = 0; for (i=0; i<2; ++i) { data = (data << 8) | *src++; } if ((rc = write_short(info, wp, data)) != 0) { return (rc); } wp += 2; cnt -= 2; } if (cnt == 0) { return (0); } /* * handle unaligned tail bytes */ data = 0; for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) { data = (data << 8) | *src++; --cnt; } for (; i<2; ++i, ++cp) { data = (data << 8) | (*(uchar *)cp); } return (write_short(info, wp, data)); } /* * Write 16 bit (short) to flash */ static int write_short (flash_info_t *info, ulong dest, ushort data) { vu_short *addr = (vu_short*)(info->start[0]); ulong start; int flag; /* Check if Flash is (sufficiently) erased */ if ((*((vu_short *)dest) & data) != data) { return (2); } /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); if (!(info->flash_id & FLASH_VENDMASK)) { return 4; } *addr = FLASH_CMD_ERASE_CONFIRM; *addr = FLASH_CMD_WRITE; *((vu_short *)dest) = data; /* re-enable interrupts if necessary */ if (flag) { enable_interrupts(); } /* data polling for D7 */ start = get_timer (0); /* wait for error or finish */ while(!(addr[0] & FLASH_STATUS_DONE)){ if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) { addr[0] = FLASH_CMD_RESET; return (1); } } *addr = FLASH_CMD_RESET; return (0); } /* * Protects a flash sector */ int flash_real_protect(flash_info_t *info, long sector, int prot) { vu_short *addr = (vu_short*)(info->start[sector]); ulong start; *addr = FLASH_CMD_CLEAR_STATUS; *addr = FLASH_CMD_PROTECT; if(prot) { *addr = FLASH_CMD_PROTECT_SET; } else { *addr = FLASH_CMD_PROTECT_CLEAR; } /* wait for error or finish */ start = get_timer (0); while(!(addr[0] & FLASH_STATUS_DONE)){ if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) { printf("Flash protect timeout at address %lx\n", info->start[sector]); addr[0] = FLASH_CMD_RESET; return (1); } } /* Set software protect flag */ info->protect[sector] = prot; *addr = FLASH_CMD_RESET; return (0); }