/* * (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 and the 8MB 32bit extra flash on the DB64360 * most of this file was based on the existing U-Boot * flash drivers. * * written or collected and sometimes rewritten by * Ingo Assmus <ingo.assmus@keymile.com> * */ #include <common.h> #include <mpc8xx.h> #include "../include/mv_gen_reg.h" #include "../include/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 */ /* 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); /*----------------------------------------------------------------------- */ 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; size_b0 = flash_get_size (CFG_BOOT_FLASH_WIDTH, (vu_long *) base, &flash_info[0]); printf ("[%ldkB@%lx] ", size_b0 / 1024, base); 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); /* base = memoryGetDeviceBaseAddress(DEV_CS3_BASE_ADDR);*/ 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]); printf ("[%ldMB@%lx] ", size >> 20, base); 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; } 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; } } } } /*----------------------------------------------------------------------- */ 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_STM: printf ("STM "); break; 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; } if ((info->size >> 20) > 0) { printf (" Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count); } else { 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 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 { /* 1x16 or 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 = 0, manu = 0, base = (ulong) addr; #ifdef DEBUG printf ("%s: enter\n", __FUNCTION__); #endif 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; info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN; info->sector_count = 8; info->size = 0x80000; 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 */ info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN; info->sector_count = 8; info->size = 0x80000; 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; } #ifdef DEBUG flash_cmd (portwidth, caddr, 0, 0xf0); 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 STM_MANUFACT: info->flash_id = FLASH_MAN_STM; break; 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: flash_cmd (portwidth, caddr, 0, 0xf0); 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; /* => 512 kB */ 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: flash_cmd (portwidth, caddr, 0, 0xf0); 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); /* 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); } int flash_erase (flash_info_t * info, int s_first, int s_last) { volatile unsigned char *addr = (uchar *) (info->start[0]); int flag, prot, sect, l_sect; ulong start, now, last; /* modified to support 2x16 Intel flash */ /* Note that the code will not exit on a flash erasure error or timeout */ /* but will print and error message and continue processing sectors */ /* until they are all erased. */ /* 10-16-2002 P. Marchese */ ulong mask; int timeout; if (info->portwidth == 4) /* { printf ("- Warning: erasing of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n"); return 1; }*/ { /* make sure it's Intel flash */ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { /* yup! it's an Intel flash */ /* is it 16-bits wide? */ if (info->chipwidth == 2) { /* yup! it's 16-bits wide */ /* are there any sectors to process? */ if ((s_first < 0) || (s_first > s_last)) { printf ("Error: There are no sectors to erase\n"); printf ("Either sector %d is less than zero\n", s_first); printf ("or sector %d is greater than sector %d\n", s_first, s_last); return 1; } /* check for protected sectors */ prot = 0; for (sect = s_first; sect <= s_last; ++sect) if (info->protect[sect]) prot++; /* if variable "prot" is nonzero, there are protected sectors */ if (prot) printf ("- Warning: %d protected sectors will not be erased!\n", prot); /* reset the flash */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RST); /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); /* Clear the status register */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_CLR_STAT); flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RST); /* Start erase on unprotected sectors */ for (sect = s_first; sect <= s_last; sect++) { /* is the sector unprotected? */ if (info->protect[sect] == 0) { /* not protected */ /* issue the single block erase command, 0x20 */ flash_cmd (info->portwidth, (volatile unsigned char *) info-> start[sect], 0, CHIP_CMD_ERASE1); /* issue the erase confirm command, 0xD0 */ flash_cmd (info->portwidth, (volatile unsigned char *) info-> start[sect], 0, CHIP_CMD_ERASE2); l_sect = sect; /* re-enable interrupts if necessary */ if (flag) enable_interrupts (); /* poll for erasure completion */ /* put flash into read status mode by writing 0x70 to it */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RD_STAT); /* setup the status register mask */ mask = CHIP_STAT_RDY | (CHIP_STAT_RDY << 16); /* init. the timeout counter */ start = get_timer (0); /* keep looping while the flash is not ready */ /* exit the loop by timing out or the flash */ /* becomes ready again */ timeout = 0; while ((* (volatile unsigned long *) info-> start[sect] & mask) != mask) { /* has the timeout limit been reached? */ if (get_timer (start) > CFG_FLASH_ERASE_TOUT) { /* timeout limit reached */ printf ("Time out limit reached erasing sector at address %08lx\n", info->start[sect]); printf ("Continuing with next sector\n"); timeout = 1; goto timed_out_error; } /* put flash into read status mode by writing 0x70 to it */ flash_cmd (info-> portwidth, addr, 0, CHIP_CMD_RD_STAT); } /* did we timeout? */ timed_out_error:if (timeout == 0) { /* didn't timeout, so check the status register */ /* create the status mask to check for errors */ mask = CHIP_STAT_ECLBS; mask = mask | (mask << 16); /* put flash into read status mode by writing 0x70 to it */ flash_cmd (info-> portwidth, addr, 0, CHIP_CMD_RD_STAT); /* are there any errors? */ if ((* (volatile unsigned long *) info-> start[sect] & mask) != 0) { /* We got an erasure error */ printf ("Flash erasure error at address 0x%08lx\n", info->start[sect]); printf ("Continuing with next sector\n"); /* reset the flash */ flash_cmd (info-> portwidth, addr, 0, CHIP_CMD_RST); } } /* erasure completed without errors */ /* reset the flash */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RST); } /* end if not protected */ } /* end for loop */ printf ("Flash erasure done\n"); return 0; } else { /* The Intel flash is not 16-bit wide */ /* print and error message and return */ /* NOTE: you can add routines here to handle other size flash */ printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8); printf ("The erasure code only handles Intel 16-bit wide flash memory\n"); return 1; } } else { /* Not Intel flash so return an error as a write timeout */ /* NOTE: if it's another type flash, stick its routine here */ printf ("Error: The flash device is not Intel type\n"); printf ("The erasure code only supports Intel flash in a 32-bit port width\n"); return 1; } } /* end 32-bit wide flash code */ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM) return 1; /* Rom can not be erased */ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { /* RAM just copy 0s to RAM */ for (sect = s_first; sect <= s_last; sect++) { int sector_size = info->size / info->sector_count; addr = (uchar *) (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) { /* Intel works spezial */ return flash_erase_intel (info, (unsigned short) s_first, (unsigned short) s_last); } #if 0 if ((info->flash_id == FLASH_UNKNOWN) || /* Flash is unknown to PPCBoot */ (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); /* start erase routine */ 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 = (uchar *) (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; /* Commented out since the below code should work for 32-bit(2x 16 flash) */ /* 10-16-2002 P. Marchese */ /* if(info->portwidth==4) return 1; */ /* if(info->portwidth==4) { printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n"); 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 = (uchar *) (info->start[0]); ulong start; int flag, i; ulong mask; /* modified so that it handles 32-bit(2x16 Intel flash programming */ /* 10-16-2002 P. Marchese */ if (info->portwidth == 4) /* { printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n"); return 1; }*/ { /* make sure it's Intel flash */ if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) { /* yup! it's an Intel flash */ /* is it 16-bits wide? */ if (info->chipwidth == 2) { /* yup! it's 16-bits wide */ /* so we know how to program it */ /* reset the flash */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RST); /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts (); /* Clear the status register */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_CLR_STAT); flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RST); /* 1st cycle of word/byte program */ /* write 0x40 to the location to program */ flash_cmd (info->portwidth, (uchar *) dest, 0, CHIP_CMD_PROG); /* 2nd cycle of word/byte program */ /* write the data to the destination address */ *(ulong *) dest = data; /* re-enable interrupts if necessary */ if (flag) enable_interrupts (); /* setup the status register mask */ mask = CHIP_STAT_RDY | (CHIP_STAT_RDY << 16); /* put flash into read status mode by writing 0x70 to it */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RD_STAT); /* init. the timeout counter */ start = get_timer (0); /* keep looping while the flash is not ready */ /* exit the loop by timing out or the flash */ /* becomes ready again */ /* 11-13-2002 Paul Marchese */ /* modified while loop conditional statement */ /* because we were always timing out. */ /* there is a type mismatch, "addr[0]" */ /* returns a byte but "mask" is a 32-bit value */ while ((*(volatile unsigned long *) info-> start[0] & mask) != mask) /* original code */ /* while (addr[0] & mask) != mask) */ { /* has the timeout limit been reached? */ if (get_timer (start) > CFG_FLASH_WRITE_TOUT) { /* timeout limit reached */ printf ("Time out limit reached programming address %08lx with data %08lx\n", dest, data); /* reset the flash */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RST); return (1); } /* put flash into read status mode by writing 0x70 to it */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RD_STAT); } /* flash is ready, so check the status */ /* create the status mask to check for errors */ mask = CHIP_STAT_DPS | CHIP_STAT_VPPS | CHIP_STAT_PSLBS; mask = mask | (mask << 16); /* put flash into read status mode by writing 0x70 to it */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RD_STAT); /* are there any errors? */ if ((addr[0] & mask) != 0) { /* We got a one of the following errors: */ /* Voltage range, Device protect, or programming */ /* return the error as a device timeout */ /* put flash into read status mode by writing 0x70 to it */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RD_STAT); printf ("Flash programming error at address 0x%08lx\n", dest); printf ("Flash status register contains 0x%08lx\n", (unsigned long) addr[0]); /* reset the flash */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RST); return 1; } /* write completed without errors */ /* reset the flash */ flash_cmd (info->portwidth, addr, 0, CHIP_CMD_RST); return 0; } else { /* it's not 16-bits wide, so return an error as a write timeout */ /* NOTE: you can add routines here to handle other size flash */ printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8); printf ("The write code only handles Intel 16-bit wide flash memory\n"); return 1; } } else { /* not Intel flash so return an error as a write timeout */ /* NOTE: if it's another type flash, stick its routine here */ printf ("Error: The flash device is not Intel type\n"); printf ("The code only supports Intel flash in a 32-bit port width\n"); return 1; } } /* end of 32-bit flash code */ 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); }