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drivers: rkflash: Add retry after flash buffer bitflip

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We found that this abnormality exists not only in power lost,
but also in extreme environments during normal use, so the
retry mechanism is added.

Change-Id: Iaaa84a099c575dde833f6806036ea216ab98fe54
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
This commit is contained in:
Jon Lin
2021-08-09 18:15:28 +08:00
committed by Tao Huang
parent 698423bf9f
commit 1a36b157ba
1 changed files with 5 additions and 4 deletions
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9
drivers/rkflash/sfc_nand.c
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@@ -762,15 +762,16 @@ u32 sfc_nand_prog_page_raw(u8 cs, u32 addr, u32 *p_page_buf)
sfc_request(&op, plane, p_page_buf, page_size);
/*
* At the moment of power lost, flash maybe work in a unkonw state
* and result in bit flip, when this situation is detected by cache
* recheck, it's better to wait a second for a reliable hardware
* environment to avoid abnormal data written to flash array.
* At the moment of power lost or dev running in harsh environment, flash
* maybe work in a unkonw state and result in bit flip, when this situation
* is detected by cache recheck, it's better to wait a second for a reliable
* hardware environment to avoid abnormal data written to flash array.
*/
sfc_nand_read_cache(addr, (u32 *)sfc_nand_dev.recheck_buffer, 0, data_area_size);
if (memcmp(sfc_nand_dev.recheck_buffer, p_page_buf, data_area_size)) {
rkflash_print_error("%s cache bitflip1\n", __func__);
msleep(1000);
sfc_request(&op, plane, p_page_buf, page_size);
}
op.sfcmd.d32 = 0;