linux/drivers/mtd/nand/spi/esmt.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Author:
 *	Chuanhong Guo <[email protected]> - the main driver logic
 *	Martin Kurbanov <[email protected]> - OOB layout
 */

#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/mtd/spinand.h>

/* ESMT uses GigaDevice 0xc8 JECDEC ID on some SPI NANDs */
#define SPINAND_MFR_ESMT_C8 …

static SPINAND_OP_VARIANTS(read_cache_variants,
			   SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
			   SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
			   SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
			   SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));

static SPINAND_OP_VARIANTS(write_cache_variants,
			   SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
			   SPINAND_PROG_LOAD(true, 0, NULL, 0));

static SPINAND_OP_VARIANTS(update_cache_variants,
			   SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
			   SPINAND_PROG_LOAD(false, 0, NULL, 0));

/*
 * OOB spare area map (64 bytes)
 *
 * Bad Block Markers
 * filled by HW and kernel                 Reserved
 *   |                 +-----------------------+-----------------------+
 *   |                 |                       |                       |
 *   |                 |    OOB free data Area |non ECC protected      |
 *   |   +-------------|-----+-----------------|-----+-----------------|-----+
 *   |   |             |     |                 |     |                 |     |
 * +-|---|----------+--|-----|--------------+--|-----|--------------+--|-----|--------------+
 * | |   | section0 |  |     |    section1  |  |     |    section2  |  |     |    section3  |
 * +-v-+-v-+---+----+--v--+--v--+-----+-----+--v--+--v--+-----+-----+--v--+--v--+-----+-----+
 * |   |   |   |    |     |     |     |     |     |     |     |     |     |     |     |     |
 * |0:1|2:3|4:7|8:15|16:17|18:19|20:23|24:31|32:33|34:35|36:39|40:47|48:49|50:51|52:55|56:63|
 * |   |   |   |    |     |     |     |     |     |     |     |     |     |     |     |     |
 * +---+---+-^-+--^-+-----+-----+--^--+--^--+-----+-----+--^--+--^--+-----+-----+--^--+--^--+
 *           |    |                |     |                 |     |                 |     |
 *           |    +----------------|-----+-----------------|-----+-----------------|-----+
 *           |             ECC Area|(Main + Spare) - filled|by ESMT NAND HW        |
 *           |                     |                       |                       |
 *           +---------------------+-----------------------+-----------------------+
 *                         OOB ECC protected Area - not used due to
 *                         partial programming from some filesystems
 *                             (like JFFS2 with cleanmarkers)
 */

#define ESMT_OOB_SECTION_COUNT …
#define ESMT_OOB_SECTION_SIZE(nand) …
#define ESMT_OOB_FREE_SIZE(nand) …
#define ESMT_OOB_ECC_SIZE(nand) …
#define ESMT_OOB_BBM_SIZE …

static int f50l1g41lb_ooblayout_ecc(struct mtd_info *mtd, int section,
				    struct mtd_oob_region *region)
{ … }

static int f50l1g41lb_ooblayout_free(struct mtd_info *mtd, int section,
				     struct mtd_oob_region *region)
{ … }

static const struct mtd_ooblayout_ops f50l1g41lb_ooblayout = …;

static const struct spinand_info esmt_c8_spinand_table[] = …;

static const struct spinand_manufacturer_ops esmt_spinand_manuf_ops = …;

const struct spinand_manufacturer esmt_c8_spinand_manufacturer = …;