diff options
Diffstat (limited to 'board/mousse/flash.c')
| -rw-r--r-- | board/mousse/flash.c | 944 |
1 files changed, 944 insertions, 0 deletions
diff --git a/board/mousse/flash.c b/board/mousse/flash.c new file mode 100644 index 0000000000..3c4a802da6 --- /dev/null +++ b/board/mousse/flash.c @@ -0,0 +1,944 @@ +/* + * MOUSSE/MPC8240 Board definitions. + * Flash Routines for MOUSSE onboard AMD29LV106DB devices + * + * (C) Copyright 2000 + * Marius Groeger <mgroeger@sysgo.de> + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * + * (C) Copyright 2000 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * (C) Copyright 1999, by Curt McDowell, 08-06-99, Broadcom Corp. + * (C) Copyright 2001, James Dougherty, 07/18/01, Broadcom Corp. + * + * 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 <mpc8xx.h> +#include <malloc.h> +#include "mousse.h" +#include "flash.h" + +int flashLibDebug = 0; +int flashLibInited = 0; + +#define OK 0 +#define ERROR -1 +#define STATUS int +#define PRINTF if (flashLibDebug) printf +#if 0 +#define PRIVATE static +#else +#define PRIVATE +#endif + +flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; + +#define SLEEP_DELAY 166 +#define FLASH_SECTOR_SIZE (64*1024) +/*********************************************************************** + * + * Virtual Flash Devices on Mousse board + * + * These must be kept in sync with the definitions in flashLib.h. + * + ***********************************************************************/ + +PRIVATE flash_dev_t flashDev[] = { + /* Bank 0 sector SA0 (16 kB) */ + { "SA0",FLASH0_BANK, FLASH0_SEG0_START, 1, 14, + FLASH0_VENDOR_ID, FLASH0_DEVICE_ID + }, + /* Bank 0 sector SA1 (8 kB) */ + { "SA1", FLASH0_BANK, FLASH0_SEG0_START + 0x4000, 1, 13, + FLASH0_VENDOR_ID, FLASH0_DEVICE_ID + }, + /* Bank 0 sector SA2 (8 kB) */ + { "SA2", FLASH0_BANK, FLASH0_SEG0_START + 0x6000, 1, 13, + FLASH0_VENDOR_ID, FLASH0_DEVICE_ID + }, + /* Bank 0 sector SA3 is occluded by Mousse I/O devices */ + /* Bank 0 sectors SA4-SA18, after Mousse devices up to PLCC (960 kB) */ + { "KERNEL", FLASH0_BANK, FLASH0_SEG1_START, 15, 16, + FLASH0_VENDOR_ID, FLASH0_DEVICE_ID + }, + /* Bank 0 sectors SA19-SA26, jumper can occlude this by PLCC (512 kB) */ + /* This is where the Kahlua boot vector and boot ROM code resides. */ + { "BOOT",FLASH0_BANK, FLASH0_SEG2_START, 8, 16, + FLASH0_VENDOR_ID, FLASH0_DEVICE_ID + }, + /* Bank 0 sectors SA27-SA34 (512 kB) */ + { "RAMDISK",FLASH0_BANK, FLASH0_SEG3_START, 8, 16, + FLASH0_VENDOR_ID, FLASH0_DEVICE_ID + }, +}; + +int flashDevCount = (sizeof (flashDev) / sizeof (flashDev[0])); + +#define DEV(no) (&flashDev[no]) +#define DEV_NO(dev) ((dev) - flashDev) + +/*********************************************************************** + * + * Private Flash Routines + * + ***********************************************************************/ + +/* + * The convention is: + * + * "addr" is always the PROM raw address, which is the address of an + * 8-bit quantity for flash 0 and 16-bit quantity for flash 1. + * + * "pos" is always a logical byte position from the PROM beginning. + */ + +#define FLASH0_ADDR(dev, addr) \ + ((unsigned char *) ((dev)->base + (addr))) + +#define FLASH0_WRITE(dev, addr, value) \ + (*FLASH0_ADDR(dev, addr) = (value)) + +#define FLASH0_READ(dev, addr) \ + (*FLASH0_ADDR(dev, addr)) + +PRIVATE int flashCheck(flash_dev_t *dev) +{ + if (! flashLibInited) { + printf("flashCheck: flashLib not initialized\n"); + return ERROR; + } + + if (dev < &flashDev[0] || dev >= &flashDev[flashDevCount]) { + printf("flashCheck: Bad dev parameter\n"); + return ERROR; + } + + if (! dev->found) { + printf("flashCheck: Device %d not available\n", DEV_NO(dev)); + return ERROR; + } + + return OK; +} + +PRIVATE void flashReset(flash_dev_t *dev) +{ + PRINTF("flashReset: dev=%d\n", DEV_NO(dev)); + + if (dev->bank == FLASH0_BANK) { + FLASH0_WRITE(dev, 0x555, 0xaa); + FLASH0_WRITE(dev, 0xaaa, 0x55); + FLASH0_WRITE(dev, 0x555, 0xf0); + } + + udelay(SLEEP_DELAY); + + PRINTF("flashReset: done\n"); +} + +PRIVATE int flashProbe(flash_dev_t *dev) +{ + int rv, deviceID, vendorID; + + PRINTF("flashProbe: dev=%d\n", DEV_NO(dev)); + + if (dev->bank != FLASH0_BANK) { + rv = ERROR; + goto DONE; + } + + FLASH0_WRITE(dev, 0xaaa, 0xaa); + FLASH0_WRITE(dev, 0x555, 0x55); + FLASH0_WRITE(dev, 0xaaa, 0x90); + + udelay(SLEEP_DELAY); + + vendorID = FLASH0_READ(dev, 0); + deviceID = FLASH0_READ(dev, 2); + + FLASH0_WRITE(dev, 0, 0xf0); + + PRINTF("flashProbe: vendor=0x%x device=0x%x\n", vendorID, deviceID); + + if (vendorID == dev->vendorID && deviceID == dev->deviceID) + rv = OK; + else + rv = ERROR; + +DONE: + PRINTF("flashProbe: rv=%d\n", rv); + + return rv; +} + +PRIVATE int flashWait(flash_dev_t *dev, int addr, int expect, int erase) +{ + int rv = ERROR; + int i, data; + int polls; +#if 0 + PRINTF("flashWait: dev=%d addr=0x%x expect=0x%x erase=%d\n", + DEV_NO(dev), addr, expect, erase); +#endif + + if (dev->bank != FLASH0_BANK) { + rv = ERROR; + goto done; + } + + if (erase) + polls = FLASH_ERASE_SECTOR_TIMEOUT; /* Ticks */ + else + polls = FLASH_PROGRAM_POLLS; /* Loops */ + + for (i = 0; i < polls; i++) { + if (erase) + udelay(SLEEP_DELAY); + + data = FLASH0_READ(dev, addr); + + if (((data ^ expect) & 0x80) == 0) { + rv = OK; + goto done; + } + + if (data & 0x20) { + /* + * If the 0x20 bit has come on, it could actually be because + * the operation succeeded, so check the done bit again. + */ + + data = FLASH0_READ(dev, addr); + + if (((data ^ expect) & 0x80) == 0) { + rv = OK; + goto done; + } + + printf("flashWait: Program error (dev: %d, addr: 0x%x)\n", + DEV_NO(dev), addr); + + flashReset(dev); + rv = ERROR; + goto done; + } + } + + printf("flashWait: Timeout %s (dev: %d, addr: 0x%x)\n", + erase ? "erasing sector" : "programming byte", + DEV_NO(dev), addr); + +done: + +#if 0 + PRINTF("flashWait: rv=%d\n", rv); +#endif + + return rv; +} + +/*********************************************************************** + * + * Public Flash Routines + * + ***********************************************************************/ + +STATUS flashLibInit(void) +{ + int i; + + PRINTF("flashLibInit: devices=%d\n", flashDevCount); + + for (i = 0; i < flashDevCount; i++) { + flash_dev_t *dev = &flashDev[i]; + /* + * For bank 1, probe both without and with byte swappage, + * so that this module works on both old and new Mousse boards. + */ + + flashReset(dev); + + if (flashProbe(dev) != ERROR) + dev->found = 1; + + flashReset(dev); + + if (flashProbe(dev) != ERROR) + dev->found = 1; + + dev->swap = 0; + + if(dev->found){ + PRINTF("\n FLASH %s[%d]: iobase=0x%x - %d sectors %d KB", + flashDev[i].name,i,flashDev[i].base, flashDev[i].sectors, + (flashDev[i].sectors * FLASH_SECTOR_SIZE)/1024); + + } + } + + flashLibInited = 1; + + PRINTF("flashLibInit: done\n"); + + return OK; +} + +STATUS flashEraseSector(flash_dev_t *dev, int sector) +{ + int pos, addr; + + PRINTF("flashErasesector: dev=%d sector=%d\n", DEV_NO(dev), sector); + + if (flashCheck(dev) == ERROR) + return ERROR; + + if (sector < 0 || sector >= dev->sectors) { + printf("flashEraseSector: Sector out of range (dev: %d, sector: %d)\n", + DEV_NO(dev), sector); + return ERROR; + } + + pos = FLASH_SECTOR_POS(dev, sector); + + if (dev->bank != FLASH0_BANK) { + return ERROR; + } + + addr = pos; + + FLASH0_WRITE(dev, 0xaaa, 0xaa); + FLASH0_WRITE(dev, 0x555, 0x55); + FLASH0_WRITE(dev, 0xaaa, 0x80); + FLASH0_WRITE(dev, 0xaaa, 0xaa); + FLASH0_WRITE(dev, 0x555, 0x55); + FLASH0_WRITE(dev, addr, 0x30); + + return flashWait(dev, addr, 0xff, 1); +} + +/* + * Note: it takes about as long to flash all sectors together with Chip + * Erase as it does to flash them one at a time (about 30 seconds for 2 + * MB). Also since we want to be able to treat subsets of sectors as if + * they were complete devices, we don't use Chip Erase. + */ + +STATUS flashErase(flash_dev_t *dev) +{ + int sector; + + PRINTF("flashErase: dev=%d sectors=%d\n", DEV_NO(dev), dev->sectors); + + if (flashCheck(dev) == ERROR) + return ERROR; + + for (sector = 0; sector < dev->sectors; sector++) { + if (flashEraseSector(dev, sector) == ERROR) + return ERROR; + } + return OK; +} + +/* + * Read and write bytes + */ + +STATUS flashRead(flash_dev_t *dev, int pos, char *buf, int len) +{ + int addr, words; + + PRINTF("flashRead: dev=%d pos=0x%x buf=0x%x len=0x%x\n", + DEV_NO(dev), pos, (int) buf, len); + + if (flashCheck(dev) == ERROR) + return ERROR; + + if (pos < 0 || len < 0 || pos + len > FLASH_MAX_POS(dev)) { + printf("flashRead: Position out of range " + "(dev: %d, pos: 0x%x, len: 0x%x)\n", + DEV_NO(dev), pos, len); + return ERROR; + } + + if (len == 0) + return OK; + + if (dev->bank == FLASH0_BANK) { + addr = pos; + words = len; + + PRINTF("flashRead: memcpy(0x%x, 0x%x, 0x%x)\n", + (int) buf, (int) FLASH0_ADDR(dev, pos), len); + + memcpy(buf, FLASH0_ADDR(dev, addr), words); + + } + PRINTF("flashRead: rv=OK\n"); + + return OK; +} + +STATUS flashWrite(flash_dev_t *dev, int pos, char *buf, int len) +{ + int addr, words; + + PRINTF("flashWrite: dev=%d pos=0x%x buf=0x%x len=0x%x\n", + DEV_NO(dev), pos, (int) buf, len); + + if (flashCheck(dev) == ERROR) + return ERROR; + + if (pos < 0 || len < 0 || pos + len > FLASH_MAX_POS(dev)) { + printf("flashWrite: Position out of range " + "(dev: %d, pos: 0x%x, len: 0x%x)\n", + DEV_NO(dev), pos, len); + return ERROR; + } + + if (len == 0) + return OK; + + if (dev->bank == FLASH0_BANK) { + unsigned char tmp; + + addr = pos; + words = len; + + while (words--) { + tmp = *buf; + if (~FLASH0_READ(dev, addr) & tmp) { + printf("flashWrite: Attempt to program 0 to 1 " + "(dev: %d, addr: 0x%x, data: 0x%x)\n", + DEV_NO(dev), addr, tmp); + return ERROR; + } + FLASH0_WRITE(dev, 0xaaa, 0xaa); + FLASH0_WRITE(dev, 0x555, 0x55); + FLASH0_WRITE(dev, 0xaaa, 0xa0); + FLASH0_WRITE(dev, addr, tmp); + if (flashWait(dev, addr, tmp, 0) < 0) + return ERROR; + buf++; + addr++; + } + } + + PRINTF("flashWrite: rv=OK\n"); + + return OK; +} + +/* + * flashWritable returns TRUE if a range contains all F's. + */ + +STATUS flashWritable(flash_dev_t *dev, int pos, int len) +{ + int addr, words; + int rv = ERROR; + + PRINTF("flashWritable: dev=%d pos=0x%x len=0x%x\n", + DEV_NO(dev), pos, len); + + if (flashCheck(dev) == ERROR) + goto done; + + if (pos < 0 || len < 0 || pos + len > FLASH_MAX_POS(dev)) { + printf("flashWritable: Position out of range " + "(dev: %d, pos: 0x%x, len: 0x%x)\n", + DEV_NO(dev), pos, len); + goto done; + } + + if (len == 0) { + rv = 1; + goto done; + } + + if (dev->bank == FLASH0_BANK) { + addr = pos; + words = len; + + while (words--) { + if (FLASH0_READ(dev, addr) != 0xff) { + rv = 0; + goto done; + } + addr++; + } + } + + rv = 1; + + done: + PRINTF("flashWrite: rv=%d\n", rv); + return rv; +} + + +/* + * NOTE: the below code cannot run from FLASH!!! + */ +/*********************************************************************** + * + * Flash Diagnostics + * + ***********************************************************************/ + +STATUS flashDiag(flash_dev_t *dev) +{ + unsigned int *buf = 0; + int i, len, sector; + int rv = ERROR; + + if (flashCheck(dev) == ERROR) + return ERROR; + + printf("flashDiag: Testing device %d, " + "base: 0x%x, %d sectors @ %d kB = %d kB\n", + DEV_NO(dev), dev->base, + dev->sectors, + 1 << (dev->lgSectorSize - 10), + dev->sectors << (dev->lgSectorSize - 10)); + + len = 1 << dev->lgSectorSize; + + printf("flashDiag: Erasing\n"); + + if (flashErase(dev) == ERROR) { + printf("flashDiag: Erase failed\n"); + goto done; + } + printf("%d bytes requested ...\n", len); + buf = malloc(len); + printf("allocated %d bytes ...\n", len); + if (buf == 0) { + printf("flashDiag: Out of memory\n"); + goto done; + } + + /* + * Write unique counting pattern to each sector + */ + + for (sector = 0; sector < dev->sectors; sector++) { + printf("flashDiag: Write sector %d\n", sector); + + for (i = 0; i < len / 4; i++) + buf[i] = sector << 24 | i; + + if (flashWrite(dev, + sector << dev->lgSectorSize, + (char *) buf, + len) == ERROR) { + printf("flashDiag: Write failed (dev: %d, sector: %d)\n", + DEV_NO(dev), sector); + goto done; + } + } + + /* + * Verify + */ + + for (sector = 0; sector < dev->sectors; sector++) { + printf("flashDiag: Verify sector %d\n", sector); + + if (flashRead(dev, + sector << dev->lgSectorSize, + (char *) buf, + len) == ERROR) { + printf("flashDiag: Read failed (dev: %d, sector: %d)\n", + DEV_NO(dev), sector); + goto done; + } + + for (i = 0; i < len / 4; i++) { + if (buf[i] != (sector << 24 | i)) { + printf("flashDiag: Verify error " + "(dev: %d, sector: %d, offset: 0x%x)\n", + DEV_NO(dev), sector, i); + printf("flashDiag: Expected 0x%08x, got 0x%08x\n", + sector << 24 | i, buf[i]); + + goto done; + } + } + } + + printf("flashDiag: Erasing\n"); + + if (flashErase(dev) == ERROR) { + printf("flashDiag: Final erase failed\n"); + goto done; + } + + rv = OK; + + done: + if (buf) + free(buf); + + if (rv == OK) + printf("flashDiag: Device %d passed\n", DEV_NO(dev)); + else + printf("flashDiag: Device %d failed\n", DEV_NO(dev)); + + return rv; +} + +STATUS flashDiagAll(void) +{ + int i; + int rv = OK; + + PRINTF("flashDiagAll: devices=%d\n", flashDevCount); + + for (i = 0; i < flashDevCount; i++) { + flash_dev_t *dev = &flashDev[i]; + + if (dev->found && flashDiag(dev) == ERROR) + rv = ERROR; + } + + if (rv == OK) + printf("flashDiagAll: Passed\n"); + else + printf("flashDiagAll: Failed because of earlier errors\n"); + + return OK; +} + + +/*----------------------------------------------------------------------- + */ +unsigned long flash_init (void) +{ + unsigned long size = 0; + flash_dev_t *dev = NULL; + flashLibInit(); + + /* + * Provide info for FLASH (up to 960K) of Kernel Image data. + */ + dev = FLASH_DEV_BANK0_LOW; + flash_info[FLASH_BANK_KERNEL].flash_id = + (dev->vendorID << 16) | dev->deviceID; + flash_info[FLASH_BANK_KERNEL].sector_count = dev->sectors; + flash_info[FLASH_BANK_KERNEL].size = + flash_info[FLASH_BANK_KERNEL].sector_count * FLASH_SECTOR_SIZE; + flash_info[FLASH_BANK_KERNEL].start[FIRST_SECTOR] = dev->base; + size += flash_info[FLASH_BANK_KERNEL].size; + + /* + * Provide info for 512K PLCC FLASH ROM (U-Boot) + */ + dev = FLASH_DEV_BANK0_BOOT; + flash_info[FLASH_BANK_BOOT].flash_id = + (dev->vendorID << 16) | dev->deviceID; + flash_info[FLASH_BANK_BOOT].sector_count = dev->sectors; + flash_info[FLASH_BANK_BOOT].size = + flash_info[FLASH_BANK_BOOT].sector_count * FLASH_SECTOR_SIZE; + flash_info[FLASH_BANK_BOOT].start[FIRST_SECTOR] = dev->base; + size += flash_info[FLASH_BANK_BOOT].size; + + + /* + * Provide info for 512K FLASH0 segment (U-Boot) + */ + dev = FLASH_DEV_BANK0_HIGH; + flash_info[FLASH_BANK_AUX].flash_id = + (dev->vendorID << 16) | dev->deviceID; + flash_info[FLASH_BANK_AUX].sector_count = dev->sectors; + flash_info[FLASH_BANK_AUX].size = + flash_info[FLASH_BANK_AUX].sector_count * FLASH_SECTOR_SIZE; + flash_info[FLASH_BANK_AUX].start[FIRST_SECTOR] = dev->base; + size += flash_info[FLASH_BANK_AUX].size; + + + return size; +} + +/* + * Get flash device from U-Boot flash info. + */ +flash_dev_t* +getFlashDevFromInfo(flash_info_t* info) +{ + int i; + + if(!info) + return NULL; + + for (i = 0; i < flashDevCount; i++) { + flash_dev_t *dev = &flashDev[i]; + if(dev->found && (dev->base == info->start[0])) + return dev; + } + printf("ERROR: notice, no FLASH mapped at address 0x%x\n", + (unsigned int)info->start[0]); + return NULL; +} + +ulong +flash_get_size (vu_long *addr, flash_info_t *info) +{ + int i; + for(i = 0; i < flashDevCount; i++) { + flash_dev_t *dev = &flashDev[i]; + if(dev->found){ + if(dev->base == (unsigned int)addr){ + info->flash_id = (dev->vendorID << 16) | dev->deviceID; + info->sector_count = dev->sectors; + info->size = info->sector_count * FLASH_SECTOR_SIZE; + return dev->sectors * FLASH_SECTOR_SIZE; + } + } + } + return 0; +} + +void +flash_print_info (flash_info_t *info) +{ + int i; + unsigned int chip; + + if (info->flash_id == FLASH_UNKNOWN) { + printf ("missing or unknown FLASH type\n"); + return; + } + + switch ((info->flash_id >> 16) & 0xff) { + case 0x1: + printf ("AMD "); + break; + default: + printf ("Unknown Vendor "); + break; + } + chip = (unsigned int) info->flash_id & 0x000000ff; + + switch (chip) { + + case AMD_ID_F040B: + printf ("AM29F040B (4 Mbit)\n"); + break; + + case AMD_ID_LV160B: + case FLASH_AM160LV: + case 0x49: + printf ("AM29LV160B (16 Mbit / 2M x 8bit)\n"); + break; + + default: + printf ("Unknown Chip Type:0x%x\n", chip); + break; + } + + printf (" Size: %ld bytes in %d Sectors\n", + info->size, 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[FIRST_SECTOR] + i*FLASH_SECTOR_SIZE, + info->protect[i] ? " (RO)" : " " + ); + } + printf ("\n"); +} + + +/* + * Erase a range of flash sectors. + */ +int flash_erase (flash_info_t *info, int s_first, int s_last) +{ + vu_long *addr = (vu_long*)(info->start[0]); + int prot, sect, l_sect; + flash_dev_t* dev = NULL; + + 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; + } + + 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; + + /* Start erase on unprotected sectors */ + dev = getFlashDevFromInfo(info); + if(dev){ + printf("Erase FLASH[%s] -%d sectors:", dev->name, dev->sectors); + for (sect = s_first; sect<=s_last; sect++) { + if (info->protect[sect] == 0) { /* not protected */ + addr = (vu_long*)(dev->base); + /* printf("erase_sector: sector=%d, addr=0x%x\n", + sect, addr); */ + printf("."); + if(ERROR == flashEraseSector(dev, sect)){ + printf("ERROR: could not erase sector %d on FLASH[%s]\n", + sect, dev->name); + return 1; + } + } + } + } + printf (" done\n"); + return 0; +} + +/*----------------------------------------------------------------------- + * Write a word to Flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ +static int +write_word (flash_info_t *info, ulong dest, ulong data) +{ + + flash_dev_t* dev = getFlashDevFromInfo(info); + int addr = dest - info->start[0]; + + if (! dev) + return 1; + + if(OK != flashWrite(dev, addr, (char*)&data, sizeof(ulong))){ + printf("ERROR: could not write to addr=0x%x, data=0x%x\n", + (unsigned int)addr, (unsigned)data); + return 1; + } + + if((addr % FLASH_SECTOR_SIZE) == 0) + printf("."); + + + PRINTF("write_word:0x%x, base=0x%x, addr=0x%x, data=0x%x\n", + (unsigned)info->start[0], + (unsigned)dest, + (unsigned)(dest - info->start[0]), + (unsigned)data); + + + + return (0); +} + + +/*----------------------------------------------------------------------- + * Copy memory to flash, returns: + * 0 - OK + * 1 - write timeout + * 2 - Flash not erased + */ + +int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) +{ + ulong cp, wp, data; + int i, l, rc; + flash_dev_t* dev = getFlashDevFromInfo(info); + + if( dev ) { + printf("FLASH[%s]:", dev->name); + 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)); + } + return 1; +} + +/*----------------------------------------------------------------------- + */ |
