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Diffstat (limited to 'qemu/roms/u-boot/board/evb64260/flash.c')
-rw-r--r--qemu/roms/u-boot/board/evb64260/flash.c837
1 files changed, 0 insertions, 837 deletions
diff --git a/qemu/roms/u-boot/board/evb64260/flash.c b/qemu/roms/u-boot/board/evb64260/flash.c
deleted file mode 100644
index f3b0074c5..000000000
--- a/qemu/roms/u-boot/board/evb64260/flash.c
+++ /dev/null
@@ -1,837 +0,0 @@
-/*
- * (C) Copyright 2001
- * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-/*
- * 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[CONFIG_SYS_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<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
- flash_info[i].flash_id = FLASH_UNKNOWN;
- }
-
- /* the boot flash */
- base = CONFIG_SYS_FLASH_BASE;
-#ifndef CONFIG_SYS_BOOT_FLASH_WIDTH
-#define CONFIG_SYS_BOOT_FLASH_WIDTH 1
-#endif
- size_b0 = flash_get_size(CONFIG_SYS_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(CONFIG_SYS_EXTRA_FLASH_DEVICE);
- for(i=1;i<CONFIG_SYS_MAX_FLASH_BANKS;i++) {
- unsigned long size = flash_get_size(CONFIG_SYS_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 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_get_info(CONFIG_SYS_MONITOR_BASE));
-#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_get_info(CONFIG_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;
- }
- }
- }
-}
-
-/*-----------------------------------------------------------------------
- */
-
-flash_info_t *flash_get_info(ulong base)
-{
- int i;
- flash_info_t * info;
-
- for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i ++) {
- info = & flash_info[i];
- if (info->start[0] <= base && base <= info->start[0] + info->size - 1)
- break;
- }
-
- return i == CONFIG_SYS_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 = (uchar *)(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 = (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) {
- 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 = (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)) > CONFIG_SYS_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 = (uchar *)(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) > CONFIG_SYS_FLASH_WRITE_TOUT) {
- return (1);
- }
- }
- return (0);
-}