drivers/mtd/nand/raw/nand_esmt.c

Source file repositories/reference/linux-study-clean/drivers/mtd/nand/raw/nand_esmt.c

File Facts

System
Linux kernel
Corpus path
drivers/mtd/nand/raw/nand_esmt.c
Extension
.c
Size
1387 bytes
Lines
60
Domain
Driver Families
Bucket
drivers/mtd
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

switch (chip->id.data[4] & 0x3) {
		case 0x0:
			requirements.strength = 4;
			break;
		case 0x1:
			requirements.strength = 2;
			break;
		case 0x2:
			requirements.strength = 1;
			break;
		default:
			WARN(1, "Could not get ECC info");
			requirements.step_size = 0;
			break;
		}
	}

	nanddev_set_ecc_requirements(base, &requirements);
}

static int esmt_nand_init(struct nand_chip *chip)
{
	if (nand_is_slc(chip))
		/*
		 * It is known that some ESMT SLC NANDs have been shipped
		 * with the factory bad block markers in the first or last page
		 * of the block, instead of the first or second page. To be on
		 * the safe side, let's check all three locations.
		 */
		chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE |
				 NAND_BBM_LASTPAGE;

	return 0;
}

const struct nand_manufacturer_ops esmt_nand_manuf_ops = {
	.detect = esmt_nand_decode_id,
	.init = esmt_nand_init,
};

Annotation

Implementation Notes