/* * (C) Copyright 2001 * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net * * (C) Copyright 2001-2004 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2003 * Texas Instruments, <www.ti.com> * Kshitij Gupta <Kshitij@ti.com> * * 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 <linux/byteorder/swab.h> #define PHYS_FLASH_SECT_SIZE 0x00020000 /* 256 KB sectors (x2) */ flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ /* 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 #define SWAP(x) __swab16(x) #else #define FLASH_PORT_WIDTH ulong #define FLASH_PORT_WIDTHV vu_long #define SWAP(x) __swab32(x) #endif #define FPW FLASH_PORT_WIDTH #define FPWV FLASH_PORT_WIDTHV #define mb() __asm__ __volatile__ ("" : : : "memory") /* Flash Organization Structure */ typedef struct OrgDef { unsigned int sector_number; unsigned int sector_size; } OrgDef; /* Flash Organizations */ OrgDef OrgIntel_28F256L18T[] = { {4, 32 * 1024}, /* 4 * 32kBytes sectors */ {255, 128 * 1024}, /* 255 * 128kBytes sectors */ }; /*----------------------------------------------------------------------- * Functions */ unsigned long flash_init (void); 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); void inline spin_wheel (void); void flash_print_info (flash_info_t * info); void flash_unprotect_sectors (FPWV * addr); int flash_erase (flash_info_t * info, int s_first, int s_last); int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt); /*----------------------------------------------------------------------- */ unsigned long flash_init (void) { int i; ulong size = 0; for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) { switch (i) { case 0: flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]); flash_get_offsets (PHYS_FLASH_1, &flash_info[i]); break; default: panic ("configured too many flash banks!\n"); break; } size += flash_info[i].size; } /* Protect monitor and environment sectors */ flash_protect (FLAG_PROTECT_SET, CFG_FLASH_BASE, CFG_FLASH_BASE + monitor_flash_len - 1, &flash_info[0]); return size; } /*----------------------------------------------------------------------- */ static void flash_get_offsets (ulong base, flash_info_t * info) { int i; OrgDef *pOrgDef; pOrgDef = OrgIntel_28F256L18T; if (info->flash_id == FLASH_UNKNOWN) { return; } if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { for (i = 0; i < info->sector_count; i++) { if (i > 255) { info->start[i] = base + (i * 0x8000); info->protect[i] = 0; } else { info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE); info->protect[i] = 0; } } } } /*----------------------------------------------------------------------- */ 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_28F256L18T: printf ("FLASH 28F256L18T\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) { volatile FPW value; /* Write auto select command: read Manufacturer ID */ addr[0x5555] = (FPW) 0x00AA00AA; addr[0x2AAA] = (FPW) 0x00550055; addr[0x5555] = (FPW) 0x00900090; mb (); value = addr[0]; 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 */ } mb (); value = addr[1]; /* device ID */ switch (value) { case (FPW) (INTEL_ID_28F256L18T): info->flash_id += FLASH_28F256L18T; info->sector_count = 259; info->size = 0x02000000; break; /* => 32 MB */ default: info->flash_id = FLASH_UNKNOWN; break; } if (info->sector_count > CFG_MAX_FLASH_SECT) { printf ("** ERROR: sector count %d > max (%d) **\n", info->sector_count, CFG_MAX_FLASH_SECT); info->sector_count = CFG_MAX_FLASH_SECT; } addr[0] = (FPW) 0x00FF00FF; /* restore read mode */ return (info->size); } /* unprotects a sector for write and erase * on some intel parts, this unprotects the entire chip, but it * wont hurt to call this additional times per sector... */ void flash_unprotect_sectors (FPWV * addr) { #define PD_FINTEL_WSMS_READY_MASK 0x0080 *addr = (FPW) 0x00500050; /* clear status register */ /* this sends the clear lock bit command */ *addr = (FPW) 0x00600060; *addr = (FPW) 0x00D000D0; } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t * info, int s_first, int s_last) { int flag, prot, sect; ulong type, start, 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; /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); /* 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; printf ("Erasing sector %2d ... ", sect); flash_unprotect_sectors (addr); /* arm simple, non interrupt dependent timer */ reset_timer_masked (); *addr = (FPW) 0x00500050;/* clear status register */ *addr = (FPW) 0x00200020;/* erase setup */ *addr = (FPW) 0x00D000D0;/* erase confirm */ while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) { if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) { printf ("Timeout\n"); /* suspend erase */ *addr = (FPW) 0x00B000B0; /* reset to read mode */ *addr = (FPW) 0x00FF00FF; rcode = 1; break; } } /* clear status register cmd. */ *addr = (FPW) 0x00500050; *addr = (FPW) 0x00FF00FF;/* resest 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 count, 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, SWAP (data))) != 0) { return (rc); } wp += port_width; } /* * handle word aligned part */ count = 0; while (cnt >= port_width) { data = 0; for (i = 0; i < port_width; ++i) { data = (data << 8) | *src++; } if ((rc = write_data (info, wp, SWAP (data))) != 0) { return (rc); } wp += port_width; cnt -= port_width; if (count++ > 0x800) { spin_wheel (); count = 0; } } 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, SWAP (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; int flag; /* Check if Flash is (sufficiently) erased */ if ((*addr & data) != data) { printf ("not erased at %08lx (%x)\n", (ulong) addr, *addr); return (2); } flash_unprotect_sectors (addr); /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); *addr = (FPW) 0x00400040; /* write setup */ *addr = data; /* arm simple, non interrupt dependent timer */ reset_timer_masked (); /* wait while polling the status register */ while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) { if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) { *addr = (FPW) 0x00FF00FF; /* restore read mode */ return (1); } } *addr = (FPW) 0x00FF00FF; /* restore read mode */ return (0); } void inline spin_wheel (void) { static int p = 0; static char w[] = "\\/-"; printf ("\010%c", w[p]); (++p == 3) ? (p = 0) : 0; }