138 lines
4.0 KiB
C
138 lines
4.0 KiB
C
#include <common.h>
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#include "cfi_flash.h"
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/*
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* read jedec ids from device and set corresponding fields in info struct
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*
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* Note: assume cfi->vendor, cfi->portwidth and cfi->chipwidth are correct
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*
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*/
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static void intel_read_jedec_ids (flash_info_t * info)
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{
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info->manufacturer_id = 0;
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info->device_id = 0;
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info->device_id2 = 0;
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flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
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flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID);
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udelay(1000); /* some flash are slow to respond */
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info->manufacturer_id = flash_read_uchar (info,
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FLASH_OFFSET_MANUFACTURER_ID);
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info->device_id = flash_read_uchar (info,
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FLASH_OFFSET_DEVICE_ID);
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flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
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}
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/*
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* flash_is_busy - check to see if the flash is busy
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* This routine checks the status of the chip and returns true if the chip is busy
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*/
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static int intel_flash_is_busy (flash_info_t * info, flash_sect_t sect)
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{
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return !flash_isset (info, sect, 0, FLASH_STATUS_DONE);
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}
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static int intel_flash_erase_one (flash_info_t * info, long sect)
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{
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flash_write_cmd (info, sect, 0, FLASH_CMD_CLEAR_STATUS);
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flash_write_cmd (info, sect, 0, FLASH_CMD_BLOCK_ERASE);
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flash_write_cmd (info, sect, 0, FLASH_CMD_ERASE_CONFIRM);
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return flash_status_check(info, sect, info->erase_blk_tout, "erase");
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}
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static void intel_flash_prepare_write(flash_info_t * info)
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{
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flash_write_cmd (info, 0, 0, FLASH_CMD_CLEAR_STATUS);
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flash_write_cmd (info, 0, 0, FLASH_CMD_WRITE);
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}
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#ifdef CONFIG_CFI_BUFFER_WRITE
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static int intel_flash_write_cfibuffer (flash_info_t * info, ulong dest, const uchar * cp,
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int len)
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{
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flash_sect_t sector;
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int cnt;
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int retcode;
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volatile cfiptr_t src;
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volatile cfiptr_t dst;
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src.cp = (uchar *)cp;
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dst.cp = (uchar *) dest;
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sector = find_sector (info, dest);
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flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
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flash_write_cmd (info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER);
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retcode = flash_generic_status_check (info, sector, info->buffer_write_tout,
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"write to buffer");
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if (retcode != ERR_OK)
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return retcode;
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/* reduce the number of loops by the width of the port */
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cnt = len >> (info->portwidth - 1);
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flash_write_cmd (info, sector, 0, (uchar) cnt - 1);
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while (cnt-- > 0) {
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if (bankwidth_is_1(info)) {
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*dst.cp++ = *src.cp++;
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} else if (bankwidth_is_2(info)) {
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*dst.wp++ = *src.wp++;
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} else if (bankwidth_is_4(info)) {
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*dst.lp++ = *src.lp++;
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} else if (bankwidth_is_8(info)) {
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*dst.llp++ = *src.llp++;
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}
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}
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flash_write_cmd (info, sector, 0, FLASH_CMD_WRITE_BUFFER_CONFIRM);
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retcode = flash_status_check (info, sector,
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info->buffer_write_tout,
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"buffer write");
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return retcode;
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}
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#else
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#define intel_flash_write_cfibuffer NULL
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#endif /* CONFIG_CFI_BUFFER_WRITE */
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static int intel_flash_status_check (flash_info_t * info, flash_sect_t sector,
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uint64_t tout, char *prompt)
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{
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int retcode;
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retcode = flash_generic_status_check (info, sector, tout, prompt);
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if ((retcode == ERR_OK)
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&& !flash_isequal (info, sector, 0, FLASH_STATUS_DONE)) {
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retcode = ERR_INVAL;
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printf ("Flash %s error at address %lx\n", prompt,
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info->start[sector]);
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if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)) {
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puts ("Command Sequence Error.\n");
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} else if (flash_isset (info, sector, 0, FLASH_STATUS_ECLBS)) {
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puts ("Block Erase Error.\n");
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retcode = ERR_NOT_ERASED;
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} else if (flash_isset (info, sector, 0, FLASH_STATUS_PSLBS)) {
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puts ("Locking Error\n");
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}
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if (flash_isset (info, sector, 0, FLASH_STATUS_DPS)) {
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puts ("Block locked.\n");
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retcode = ERR_PROTECTED;
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}
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if (flash_isset (info, sector, 0, FLASH_STATUS_VPENS))
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puts ("Vpp Low Error.\n");
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}
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flash_write_cmd (info, sector, 0, info->cmd_reset);
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return retcode;
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}
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struct cfi_cmd_set cfi_cmd_set_intel = {
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.flash_write_cfibuffer = intel_flash_write_cfibuffer,
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.flash_erase_one = intel_flash_erase_one,
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.flash_is_busy = intel_flash_is_busy,
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.flash_read_jedec_ids = intel_read_jedec_ids,
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.flash_prepare_write = intel_flash_prepare_write,
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.flash_status_check = intel_flash_status_check,
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};
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