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path: root/drivers/mtd/cfi_flash.c
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Diffstat (limited to 'drivers/mtd/cfi_flash.c')
-rw-r--r--drivers/mtd/cfi_flash.c93
1 files changed, 86 insertions, 7 deletions
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c
index cd1a86e..d0240f5 100644
--- a/drivers/mtd/cfi_flash.c
+++ b/drivers/mtd/cfi_flash.c
@@ -605,6 +605,63 @@ static int flash_full_status_check (flash_info_t * info, flash_sect_t sector,
return retcode;
}
+static int use_flash_status_poll(flash_info_t *info)
+{
+#ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
+ if (info->vendor == CFI_CMDSET_AMD_EXTENDED ||
+ info->vendor == CFI_CMDSET_AMD_STANDARD)
+ return 1;
+#endif
+ return 0;
+}
+
+static int flash_status_poll(flash_info_t *info, void *src, void *dst,
+ ulong tout, char *prompt)
+{
+#ifdef CONFIG_SYS_CFI_FLASH_STATUS_POLL
+ ulong start;
+ int ready;
+
+#if CONFIG_SYS_HZ != 1000
+ if ((ulong)CONFIG_SYS_HZ > 100000)
+ tout *= (ulong)CONFIG_SYS_HZ / 1000; /* for a big HZ, avoid overflow */
+ else
+ tout = DIV_ROUND_UP(tout * (ulong)CONFIG_SYS_HZ, 1000);
+#endif
+
+ /* Wait for command completion */
+ start = get_timer(0);
+ while (1) {
+ switch (info->portwidth) {
+ case FLASH_CFI_8BIT:
+ ready = flash_read8(dst) == flash_read8(src);
+ break;
+ case FLASH_CFI_16BIT:
+ ready = flash_read16(dst) == flash_read16(src);
+ break;
+ case FLASH_CFI_32BIT:
+ ready = flash_read32(dst) == flash_read32(src);
+ break;
+ case FLASH_CFI_64BIT:
+ ready = flash_read64(dst) == flash_read64(src);
+ break;
+ default:
+ ready = 0;
+ break;
+ }
+ if (ready)
+ break;
+ if (get_timer(start) > tout) {
+ printf("Flash %s timeout at address %lx data %lx\n",
+ prompt, (ulong)dst, (ulong)flash_read8(dst));
+ return ERR_TIMOUT;
+ }
+ udelay(1); /* also triggers watchdog */
+ }
+#endif /* CONFIG_SYS_CFI_FLASH_STATUS_POLL */
+ return ERR_OK;
+}
+
/*-----------------------------------------------------------------------
*/
static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
@@ -752,7 +809,12 @@ static int flash_write_cfiword (flash_info_t * info, ulong dest,
if (!sect_found)
sect = find_sector (info, dest);
- return flash_full_status_check (info, sect, info->write_tout, "write");
+ if (use_flash_status_poll(info))
+ return flash_status_poll(info, &cword, dstaddr,
+ info->write_tout, "write");
+ else
+ return flash_full_status_check(info, sect,
+ info->write_tout, "write");
}
#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
@@ -914,9 +976,15 @@ static int flash_write_cfibuffer (flash_info_t * info, ulong dest, uchar * cp,
}
flash_write_cmd (info, sector, 0, AMD_CMD_WRITE_BUFFER_CONFIRM);
- retcode = flash_full_status_check (info, sector,
- info->buffer_write_tout,
- "buffer write");
+ if (use_flash_status_poll(info))
+ retcode = flash_status_poll(info, src - (1 << shift),
+ dst - (1 << shift),
+ info->buffer_write_tout,
+ "buffer write");
+ else
+ retcode = flash_full_status_check(info, sector,
+ info->buffer_write_tout,
+ "buffer write");
break;
default:
@@ -938,6 +1006,7 @@ int flash_erase (flash_info_t * info, int s_first, int s_last)
int rcode = 0;
int prot;
flash_sect_t sect;
+ int st;
if (info->flash_id != FLASH_MAN_CFI) {
puts ("Can't erase unknown flash type - aborted\n");
@@ -1001,10 +1070,20 @@ int flash_erase (flash_info_t * info, int s_first, int s_last)
break;
}
- if (flash_full_status_check
- (info, sect, info->erase_blk_tout, "erase")) {
+ if (use_flash_status_poll(info)) {
+ cfiword_t cword = (cfiword_t)0xffffffffffffffffULL;
+ void *dest;
+ dest = flash_map(info, sect, 0);
+ st = flash_status_poll(info, &cword, dest,
+ info->erase_blk_tout, "erase");
+ flash_unmap(info, sect, 0, dest);
+ } else
+ st = flash_full_status_check(info, sect,
+ info->erase_blk_tout,
+ "erase");
+ if (st)
rcode = 1;
- } else if (flash_verbose)
+ else if (flash_verbose)
putc ('.');
}
}