mtd: onenand: add workaround for SYNC_WRITE mode
Some chips fails to identify properly when SYNC_WRITE mode is enabled (the example is OneNAND on S5PC110 SoC). This patch adds a workaround for such chips. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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@ -3763,6 +3763,12 @@ static int onenand_probe(struct mtd_info *mtd)
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/* Restore system configuration 1 */
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this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1);
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/* Workaround */
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if (syscfg & ONENAND_SYS_CFG1_SYNC_WRITE) {
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bram_maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID);
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bram_dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
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}
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/* Check manufacturer ID */
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if (onenand_check_maf(bram_maf_id))
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return -ENXIO;
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@ -3782,6 +3788,9 @@ static int onenand_probe(struct mtd_info *mtd)
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this->device_id = dev_id;
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this->version_id = ver_id;
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/* Check OneNAND features */
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onenand_check_features(mtd);
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density = onenand_get_density(dev_id);
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if (FLEXONENAND(this)) {
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this->dies = ONENAND_IS_DDP(this) ? 2 : 1;
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@ -3833,9 +3842,6 @@ static int onenand_probe(struct mtd_info *mtd)
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else
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mtd->size = this->chipsize;
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/* Check OneNAND features */
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onenand_check_features(mtd);
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/*
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* We emulate the 4KiB page and 256KiB erase block size
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* But oobsize is still 64 bytes.
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