/* * (C) Copyright 2001 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net * * (C) Copyright 2001 * Wolfgang Denk, DENX Software Engineering, wd@denx.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 */ /* #define DEBUG */ #include <common.h> #include <mpc8xx.h> flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */ #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 /*----------------------------------------------------------------------- * Protection Flags: */ #define FLAG_PROTECT_SET 0x01 #define FLAG_PROTECT_CLEAR 0x02 /* Board support for 1 or 2 flash devices */ #undef FLASH_PORT_WIDTH32 #define FLASH_PORT_WIDTH16 #ifdef FLASH_PORT_WIDTH16 #define FLASH_PORT_WIDTH ushort #define FLASH_PORT_WIDTHV vu_short #else #define FLASH_PORT_WIDTH ulong #define FLASH_PORT_WIDTHV vu_long #endif #define FPW FLASH_PORT_WIDTH #define FPWV FLASH_PORT_WIDTHV /*----------------------------------------------------------------------- * Functions */ static ulong flash_get_size (FPW * addr, flash_info_t * info); static int write_data (flash_info_t * info, ulong dest, FPW data); static void flash_get_offsets (ulong base, flash_info_t * info); /*----------------------------------------------------------------------- */ unsigned long flash_init (void) { volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; volatile memctl8xx_t *memctl = &immap->im_memctl; 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 */ size_b0 = flash_get_size ((FPW *) 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 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000); memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V; /* Re-do sizing to get full correct info */ size_b0 = flash_get_size ((FPW *) CONFIG_SYS_FLASH_BASE, &flash_info[0]); flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]); #if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE /* monitor protection ON by default */ (void) flash_protect (FLAG_PROTECT_SET, CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_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_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; if (info->flash_id == FLASH_UNKNOWN) { return; } if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { for (i = 0; i < info->sector_count; i++) { info->start[i] = base + (i * 0x00020000); } } } /*----------------------------------------------------------------------- */ 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_INTEL: printf ("INTEL "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_28F320J3A: printf ("28F320J3A\n"); break; case FLASH_28F640J3A: printf ("28F640J3A\n"); break; case FLASH_28F128J3A: printf ("28F128J3A\n"); break; default: printf ("Unknown Chip Type\n"); break; } 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) == 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 (FPW * addr, flash_info_t * info) { FPW value; /* Make sure Block Lock Bits get cleared */ addr[0] = (FPW) 0x00FF00FF; addr[0] = (FPW) 0x00600060; addr[0] = (FPW) 0x00D000D0; addr[0] = (FPW) 0x00FF00FF; /* Write auto select command: read Manufacturer ID */ addr[0x5555] = (FPW) 0x00AA00AA; addr[0x2AAA] = (FPW) 0x00550055; addr[0x5555] = (FPW) 0x00900090; value = addr[0]; debug ("Manuf. ID @ 0x%08lx: 0x%08lx\n", (ulong)addr, value); switch (value) { case (FPW) INTEL_MANUFACT: info->flash_id = FLASH_MAN_INTEL; break; default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; addr[0] = (FPW) 0x00FF00FF; /* restore read mode */ return (0); /* no or unknown flash */ } value = addr[1]; /* device ID */ debug ("Device ID @ 0x%08lx: 0x%08lx\n", (ulong)(&addr[1]), value); switch (value) { case (FPW) INTEL_ID_28F320J3A: info->flash_id += FLASH_28F320J3A; info->sector_count = 32; info->size = 0x00400000; break; /* => 4 MB */ case (FPW) INTEL_ID_28F640J3A: info->flash_id += FLASH_28F640J3A; info->sector_count = 64; info->size = 0x00800000; break; /* => 8 MB */ case (FPW) INTEL_ID_28F128J3A: info->flash_id += FLASH_28F128J3A; info->sector_count = 128; info->size = 0x01000000; break; /* => 16 MB */ default: info->flash_id = FLASH_UNKNOWN; break; } 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] = (FPW) 0x00FF00FF; /* restore read mode */ return (info->size); } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t * info, int s_first, int s_last) { int flag, prot, sect; ulong type, start, now, last; int rcode = 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; } type = (info->flash_id & FLASH_VENDMASK); if ((type != FLASH_MAN_INTEL)) { 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"); } 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 */ FPWV *addr = (FPWV *) (info->start[sect]); FPW status; /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); *addr = (FPW) 0x00500050; /* clear status register */ *addr = (FPW) 0x00200020; /* erase setup */ *addr = (FPW) 0x00D000D0; /* 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) & (FPW) 0x00800080) != (FPW) 0x00800080) { if ((now = get_timer (start)) > CONFIG_SYS_FLASH_ERASE_TOUT) { printf ("Timeout\n"); *addr = (FPW) 0x00B000B0; /* suspend erase */ *addr = (FPW) 0x00FF00FF; /* reset to read mode */ rcode = 1; break; } /* show that we're waiting */ if ((now - last) > 1000) { /* every second */ putc ('.'); last = now; } } *addr = (FPW) 0x00FF00FF; /* reset to read mode */ } } printf (" done\n"); return rcode; } /*----------------------------------------------------------------------- * 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; FPW data; int i, l, rc, port_width; if (info->flash_id == FLASH_UNKNOWN) { return 4; } /* get lower word aligned address */ #ifdef FLASH_PORT_WIDTH16 wp = (addr & ~1); port_width = 2; #else wp = (addr & ~3); port_width = 4; #endif /* * 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 < port_width && cnt > 0; ++i) { data = (data << 8) | *src++; --cnt; ++cp; } for (; cnt == 0 && i < port_width; ++i, ++cp) { data = (data << 8) | (*(uchar *) cp); } if ((rc = write_data (info, wp, data)) != 0) { return (rc); } wp += port_width; } /* * handle word aligned part */ while (cnt >= port_width) { data = 0; for (i = 0; i < port_width; ++i) { data = (data << 8) | *src++; } if ((rc = write_data (info, wp, data)) != 0) { return (rc); } wp += port_width; cnt -= port_width; } if (cnt == 0) { return (0); } /* * handle unaligned tail bytes */ data = 0; for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) { data = (data << 8) | *src++; --cnt; } for (; i < port_width; ++i, ++cp) { data = (data << 8) | (*(uchar *) cp); } return (write_data (info, wp, data)); } /*----------------------------------------------------------------------- * Write a word or halfword to Flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ static int write_data (flash_info_t * info, ulong dest, FPW data) { FPWV *addr = (FPWV *) dest; ulong status; ulong start; int flag; /* Check if Flash is (sufficiently) erased */ if ((*addr & data) != data) { printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr); return (2); } /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); *addr = (FPW) 0x00400040; /* write setup */ *addr = data; /* re-enable interrupts if necessary */ if (flag) enable_interrupts (); start = get_timer (0); while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) { if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) { *addr = (FPW) 0x00FF00FF; /* restore read mode */ return (1); } } *addr = (FPW) 0x00FF00FF; /* restore read mode */ return (0); }