/* * (C) Copyright 2001 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc. * * 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 */ /* * flash.c - flash support for the 512k, 8bit boot flash on the GEVB * most of this file was based on the existing U-Boot * flash drivers. */ #include <common.h> #include <mpc8xx.h> #include <galileo/gt64260R.h> #include <galileo/memory.h> #include "intel_flash.h" #define FLASH_ROM 0xFFFD /* unknown flash type */ #define FLASH_RAM 0xFFFE /* unknown flash type */ #define FLASH_MAN_UNKNOWN 0xFFFF0000 /* #define DEBUG */ /* #define FLASH_ID_OVERRIDE */ /* Hack to set type to 040B if ROM emulator is installed. * Can be used to program a ROM in circuit if a programmer * is not available by swapping the rom out. */ /* Intel flash commands */ int flash_erase_intel(flash_info_t *info, int s_first, int s_last); int write_word_intel(bank_addr_t addr, bank_word_t value); flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ /*----------------------------------------------------------------------- * Functions */ static ulong flash_get_size (int portwidth, vu_long *addr, flash_info_t *info); static int write_word (flash_info_t *info, ulong dest, ulong data); static void flash_get_offsets (ulong base, flash_info_t *info); static flash_info_t *flash_get_info(ulong base); /*----------------------------------------------------------------------- */ unsigned long flash_init (void) { unsigned int i; unsigned long size_b0 = 0, size_b1 = 0; unsigned long base, flash_size; /* Init: no FLASHes known */ for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { flash_info[i].flash_id = FLASH_UNKNOWN; } /* the boot flash */ base = CFG_FLASH_BASE; #ifndef CFG_BOOT_FLASH_WIDTH #define CFG_BOOT_FLASH_WIDTH 1 #endif size_b0 = flash_get_size(CFG_BOOT_FLASH_WIDTH, (vu_long *)base, &flash_info[0]); #ifndef CONFIG_P3G4 printf("["); print_size (size_b0, ""); printf("@%08lX] ", base); #endif if (flash_info[0].flash_id == FLASH_UNKNOWN) { printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b0, size_b0<<20); } base = memoryGetDeviceBaseAddress(CFG_EXTRA_FLASH_DEVICE); for(i=1;i<CFG_MAX_FLASH_BANKS;i++) { unsigned long size = flash_get_size(CFG_EXTRA_FLASH_WIDTH, (vu_long *)base, &flash_info[i]); #ifndef CONFIG_P3G4 printf("["); print_size (size, ""); printf("@%08lX] ", base); #endif if (flash_info[i].flash_id == FLASH_UNKNOWN) { if(i==1) { printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b1, size_b1<<20); } break; } size_b1+=size; base+=size; } #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_get_info(CFG_MONITOR_BASE)); #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_get_info(CFG_ENV_ADDR)); #endif flash_size = size_b0 + size_b1; return flash_size; } /*----------------------------------------------------------------------- */ static void flash_get_offsets (ulong base, flash_info_t *info) { int i; int sector_size; if(!info->sector_count) return; /* set up sector start address table */ switch(info->flash_id & FLASH_TYPEMASK) { case FLASH_AM040: case FLASH_28F128J3A: case FLASH_28F640J3A: case FLASH_RAM: /* this chip has uniformly spaced sectors */ sector_size=info->size/info->sector_count; for (i = 0; i < info->sector_count; i++) info->start[i] = base + (i * sector_size); break; default: if (info->flash_id & FLASH_BTYPE) { /* set sector offsets for bottom boot block type */ info->start[0] = base + 0x00000000; info->start[1] = base + 0x00008000; info->start[2] = base + 0x0000C000; info->start[3] = base + 0x00010000; for (i = 4; i < info->sector_count; i++) { info->start[i] = base + (i * 0x00020000) - 0x00060000; } } else { /* set sector offsets for top boot block type */ i = info->sector_count - 1; info->start[i--] = base + info->size - 0x00008000; info->start[i--] = base + info->size - 0x0000C000; info->start[i--] = base + info->size - 0x00010000; for (; i >= 0; i--) { info->start[i] = base + i * 0x00020000; } } } } /*----------------------------------------------------------------------- */ static flash_info_t *flash_get_info(ulong base) { int i; flash_info_t * info; for (i = 0; i < CFG_MAX_FLASH_BANKS; i ++) { info = & flash_info[i]; if (info->start[0] <= base && base <= info->start[0] + info->size - 1) break; } return i == CFG_MAX_FLASH_BANKS ? 0 : info; } /*----------------------------------------------------------------------- */ 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_INTEL: printf ("INTEL "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_AM040: printf ("AM29LV040B (4 Mbit, bottom boot sect)\n"); break; case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); break; case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n"); break; case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); break; case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n"); break; case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); break; case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n"); break; case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); break; case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n"); break; case FLASH_28F640J3A: printf ("28F640J3A (64 Mbit)\n"); break; case FLASH_28F128J3A: printf ("28F128J3A (128 Mbit)\n"); break; case FLASH_ROM: printf ("ROM\n"); break; case FLASH_RAM: printf ("RAM\n"); break; default: printf ("Unknown Chip Type\n"); break; } puts (" Size: "); print_size (info->size, ""); printf (" in %d Sectors\n", 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 inline void flash_cmd(int width, volatile unsigned char *addr, int offset, unsigned char cmd) { /* supports 1x8, 1x16, and 2x16 */ /* 2x8 and 4x8 are not supported */ if(width==4) { /* assuming chips are in 16 bit mode */ /* 2x16 */ unsigned long cmd32=(cmd<<16)|cmd; *(volatile unsigned long *)(addr+offset*2)=cmd32; } else if (width == 2) { /* 1x16 */ *(volatile unsigned short *)((unsigned short*)addr+offset)=cmd; } else { /* 1x8 */ *(volatile unsigned char *)(addr+offset)=cmd; } } static ulong flash_get_size (int portwidth, vu_long *addr, flash_info_t *info) { short i; volatile unsigned char *caddr = (unsigned char *)addr; volatile unsigned short *saddr = (unsigned short *)addr; volatile unsigned long *laddr = (unsigned long *)addr; char old[2], save; ulong id, manu, base = (ulong)addr; info->portwidth=portwidth; save = *caddr; flash_cmd(portwidth,caddr,0,0xf0); flash_cmd(portwidth,caddr,0,0xf0); udelay(10); old[0] = caddr[0]; old[1] = caddr[1]; if(old[0]!=0xf0) { flash_cmd(portwidth,caddr,0,0xf0); flash_cmd(portwidth,caddr,0,0xf0); udelay(10); if(*caddr==0xf0) { /* this area is ROM */ *caddr=save; #ifndef FLASH_ID_OVERRIDE info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN; info->sector_count = 8; info->size = 0x80000; #else info->flash_id = FLASH_MAN_AMD + FLASH_AM040; info->sector_count = 8; info->size = 0x80000; info->chipwidth=1; #endif flash_get_offsets(base, info); return info->size; } } else { *caddr=0; udelay(10); if(*caddr==0) { /* this area is RAM */ *caddr=save; info->flash_id = FLASH_RAM + FLASH_MAN_UNKNOWN; info->sector_count = 8; info->size = 0x80000; flash_get_offsets(base, info); return info->size; } flash_cmd(portwidth,caddr,0,0xf0); udelay(10); } /* Write auto select command: read Manufacturer ID */ flash_cmd(portwidth,caddr,0x555,0xAA); flash_cmd(portwidth,caddr,0x2AA,0x55); flash_cmd(portwidth,caddr,0x555,0x90); udelay(10); if ((caddr[0] == old[0]) && (caddr[1] == old[1])) { /* this area is ROM */ #ifndef FLASH_ID_OVERRIDE info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN; info->sector_count = 8; info->size = 0x80000; #else info->flash_id = FLASH_MAN_AMD + FLASH_AM040; info->sector_count = 8; info->size = 0x80000; info->chipwidth=1; #endif flash_get_offsets(base, info); return info->size; #ifdef DEBUG } else { printf("%px%d: %02x:%02x -> %02x:%02x\n", caddr, portwidth, old[0], old[1], caddr[0], caddr[1]); #endif } switch(portwidth) { case 1: manu = caddr[0]; manu |= manu<<16; id = caddr[1]; break; case 2: manu = saddr[0]; manu |= manu<<16; id = saddr[1]; id |= id<<16; break; case 4: manu = laddr[0]; id = laddr[1]; break; default: id = manu = -1; break; } #ifdef DEBUG printf("\n%08lx:%08lx:%08lx\n", base, manu, id); printf("%08lx %08lx %08lx %08lx\n", laddr[0],laddr[1],laddr[2],laddr[3]); #endif switch (manu) { case AMD_MANUFACT: info->flash_id = FLASH_MAN_AMD; break; case FUJ_MANUFACT: info->flash_id = FLASH_MAN_FUJ; break; case INTEL_MANUFACT: info->flash_id = FLASH_MAN_INTEL; break; default: printf("Unknown Mfr [%08lx]:%08lx\n", manu, id); info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; return (0); /* no or unknown flash */ } switch (id) { case AMD_ID_LV400T: info->flash_id += FLASH_AM400T; info->sector_count = 11; info->size = 0x00100000; info->chipwidth=1; break; /* => 1 MB */ case AMD_ID_LV400B: info->flash_id += FLASH_AM400B; info->sector_count = 11; info->size = 0x00100000; info->chipwidth=1; break; /* => 1 MB */ case AMD_ID_LV800T: info->flash_id += FLASH_AM800T; info->sector_count = 19; info->size = 0x00200000; info->chipwidth=1; break; /* => 2 MB */ case AMD_ID_LV800B: info->flash_id += FLASH_AM800B; info->sector_count = 19; info->size = 0x00200000; info->chipwidth=1; break; /* => 2 MB */ case AMD_ID_LV160T: info->flash_id += FLASH_AM160T; info->sector_count = 35; info->size = 0x00400000; info->chipwidth=1; break; /* => 4 MB */ case AMD_ID_LV160B: info->flash_id += FLASH_AM160B; info->sector_count = 35; info->size = 0x00400000; info->chipwidth=1; break; /* => 4 MB */ #if 0 /* enable when device IDs are available */ case AMD_ID_LV320T: info->flash_id += FLASH_AM320T; info->sector_count = 67; info->size = 0x00800000; break; /* => 8 MB */ case AMD_ID_LV320B: info->flash_id += FLASH_AM320B; info->sector_count = 67; info->size = 0x00800000; break; /* => 8 MB */ #endif case AMD_ID_LV040B: info->flash_id += FLASH_AM040; info->sector_count = 8; info->size = 0x80000; info->chipwidth=1; break; case INTEL_ID_28F640J3A: info->flash_id += FLASH_28F640J3A; info->sector_count = 64; info->size = 128*1024 * 64; /* 128kbytes x 64 blocks */ info->chipwidth=2; if(portwidth==4) info->size*=2; /* 2x16 */ break; case INTEL_ID_28F128J3A: info->flash_id += FLASH_28F128J3A; info->sector_count = 128; info->size = 128*1024 * 128; /* 128kbytes x 128 blocks */ info->chipwidth=2; if(portwidth==4) info->size*=2; /* 2x16 */ break; default: printf("Unknown id %lx:[%lx]\n", manu, id); info->flash_id = FLASH_UNKNOWN; info->chipwidth=1; return (0); /* => no or unknown flash */ } flash_get_offsets(base, info); #if 0 /* set up sector start address table */ if (info->flash_id & FLASH_AM040) { /* this chip has uniformly spaced sectors */ for (i = 0; i < info->sector_count; i++) info->start[i] = base + (i * 0x00010000); } else if (info->flash_id & FLASH_BTYPE) { /* set sector offsets for bottom boot block type */ info->start[0] = base + 0x00000000; info->start[1] = base + 0x00008000; info->start[2] = base + 0x0000C000; info->start[3] = base + 0x00010000; for (i = 4; i < info->sector_count; i++) { info->start[i] = base + (i * 0x00020000) - 0x00060000; } } else { /* set sector offsets for top boot block type */ i = info->sector_count - 1; info->start[i--] = base + info->size - 0x00008000; info->start[i--] = base + info->size - 0x0000C000; info->start[i--] = base + info->size - 0x00010000; for (; i >= 0; i--) { info->start[i] = base + i * 0x00020000; } } #endif /* 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 */ caddr = (volatile unsigned char *)(info->start[i]); saddr = (volatile unsigned short *)(info->start[i]); laddr = (volatile unsigned long *)(info->start[i]); if(portwidth==1) info->protect[i] = caddr[2] & 1; else if(portwidth==2) info->protect[i] = saddr[2] & 1; else info->protect[i] = laddr[2] & 1; } /* * Prevent writes to uninitialized FLASH. */ if (info->flash_id != FLASH_UNKNOWN) { caddr = (volatile unsigned char *)info->start[0]; flash_cmd(portwidth,caddr,0,0xF0); /* reset bank */ } return (info->size); } /* TODO: 2x16 unsupported */ int flash_erase (flash_info_t *info, int s_first, int s_last) { volatile unsigned char *addr = (char *)(info->start[0]); int flag, prot, sect, l_sect; ulong start, now, last; /* TODO: 2x16 unsupported */ if(info->portwidth==4) return 1; if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 1; if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { for (sect = s_first; sect<=s_last; sect++) { int sector_size=info->size/info->sector_count; addr = (char *)(info->start[sect]); memset((void *)addr, 0, sector_size); } return 0; } 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) { return flash_erase_intel(info, (unsigned short)s_first, (unsigned short)s_last); } #if 0 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; } #endif 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(); flash_cmd(info->portwidth,addr,0x555,0xAA); flash_cmd(info->portwidth,addr,0x2AA,0x55); flash_cmd(info->portwidth,addr,0x555,0x80); flash_cmd(info->portwidth,addr,0x555,0xAA); flash_cmd(info->portwidth,addr,0x2AA,0x55); /* Start erase on unprotected sectors */ for (sect = s_first; sect<=s_last; sect++) { if (info->protect[sect] == 0) { /* not protected */ addr = (char *)(info->start[sect]); flash_cmd(info->portwidth,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]); /* broken for 2x16: TODO */ 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]; flash_cmd(info->portwidth,addr,0,0xf0); flash_cmd(info->portwidth,addr,0,0xf0); printf (" done\n"); return 0; } /*----------------------------------------------------------------------- * Copy memory to flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ /* broken for 2x16: TODO */ int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) { ulong cp, wp, data; int i, l, rc; if(info->portwidth==4) return 1; if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 0; if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { memcpy((void *)addr, src, cnt); return 0; } 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 */ /* broken for 2x16: TODO */ static int write_word (flash_info_t *info, ulong dest, ulong data) { volatile unsigned char *addr = (char *)(info->start[0]); ulong start; int flag, i; if(info->portwidth==4) return 1; if((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 1; if((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { *(unsigned long *)dest=data; return 0; } if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { unsigned short low = data & 0xffff; unsigned short hi = (data >> 16) & 0xffff; int ret = write_word_intel((bank_addr_t)dest, hi); if (!ret) ret = write_word_intel((bank_addr_t)(dest+2), low); return ret; } /* 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(); /* first, perform an unlock bypass command to speed up flash writes */ addr[0x555] = 0xAA; addr[0x2AA] = 0x55; addr[0x555] = 0x20; /* write each byte out */ for (i = 0; i < 4; i++) { char *data_ch = (char *)&data; addr[0] = 0xA0; *(((char *)dest)+i) = data_ch[i]; udelay(10); /* XXX */ } /* we're done, now do an unlock bypass reset */ addr[0] = 0x90; addr[0] = 0x00; /* 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); }