Commit 35526916 authored by Jeff Kletsky's avatar Jeff Kletsky Committed by Miquel Raynal
Browse files

mtd: spinand: Add initial support for Paragon PN26G0xA 

Add initial support for Paragon Technology
PN26G01Axxxxx and PN26G02Axxxxx SPI NAND

Datasheets available at
http://www.xtxtech.com/upfile/2016082517274590.pdf
http://www.xtxtech.com/upfile/2016082517282329.pdf



Signed-off-by: default avatarJeff Kletsky <git-commits@allycomm.com>
Reviewed-by: default avatarFrieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
parent b74e6985

drivers/mtd/nand/spi/Makefile

+1 −1
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# SPDX-License-Identifier: GPL-2.0

spinand-objs := core.o gigadevice.o macronix.o micron.o toshiba.o winbond.o

spinand-objs := core.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o

obj-$(CONFIG_MTD_SPI_NAND) += spinand.o

drivers/mtd/nand/spi/core.c

+1 −0
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@@ -757,6 +757,7 @@ static const struct spinand_manufacturer *spinand_manufacturers[] = { 
	&gigadevice_spinand_manufacturer,

	&macronix_spinand_manufacturer,

	&micron_spinand_manufacturer,

	&paragon_spinand_manufacturer,

	&toshiba_spinand_manufacturer,

	&winbond_spinand_manufacturer,

};

drivers/mtd/nand/spi/paragon.c

0 → 100644
+147 −0
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// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (C) 2019 Jeff Kletsky

 *

 * Author: Jeff Kletsky <git-commits@allycomm.com>

 */



#include <linux/device.h>

#include <linux/kernel.h>

#include <linux/mtd/spinand.h>





#define SPINAND_MFR_PARAGON	0xa1





#define PN26G0XA_STATUS_ECC_BITMASK		(3 << 4)



#define PN26G0XA_STATUS_ECC_NONE_DETECTED	(0 << 4)

#define PN26G0XA_STATUS_ECC_1_7_CORRECTED	(1 << 4)

#define PN26G0XA_STATUS_ECC_ERRORED		(2 << 4)

#define PN26G0XA_STATUS_ECC_8_CORRECTED		(3 << 4)





static SPINAND_OP_VARIANTS(read_cache_variants,

		SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),

		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),

		SPINAND_PAGE_READ_FROM_CACHE_DUALIO_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));





static int pn26g0xa_ooblayout_ecc(struct mtd_info *mtd, int section,

				   struct mtd_oob_region *region)

{

	if (section > 3)

		return -ERANGE;



	region->offset = 6 + (15 * section); /* 4 BBM + 2 user bytes */

	region->length = 13;



	return 0;

}



static int pn26g0xa_ooblayout_free(struct mtd_info *mtd, int section,

				   struct mtd_oob_region *region)

{

	if (section > 4)

		return -ERANGE;



	if (section == 4) {

		region->offset = 64;

		region->length = 64;

	} else {

		region->offset = 4 + (15 * section);

		region->length = 2;

	}



	return 0;

}



static int pn26g0xa_ecc_get_status(struct spinand_device *spinand,

				   u8 status)

{

	switch (status & PN26G0XA_STATUS_ECC_BITMASK) {

	case PN26G0XA_STATUS_ECC_NONE_DETECTED:

		return 0;



	case PN26G0XA_STATUS_ECC_1_7_CORRECTED:

		return 7;	/* Return upper limit by convention */



	case PN26G0XA_STATUS_ECC_8_CORRECTED:

		return 8;



	case PN26G0XA_STATUS_ECC_ERRORED:

		return -EBADMSG;



	default:

		break;

	}



	return -EINVAL;

}



static const struct mtd_ooblayout_ops pn26g0xa_ooblayout = {

	.ecc = pn26g0xa_ooblayout_ecc,

	.free = pn26g0xa_ooblayout_free,

};





static const struct spinand_info paragon_spinand_table[] = {

	SPINAND_INFO("PN26G01A", 0xe1,

		     NAND_MEMORG(1, 2048, 128, 64, 1024, 21, 1, 1, 1),

		     NAND_ECCREQ(8, 512),

		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,

					      &write_cache_variants,

					      &update_cache_variants),

		     0,

		     SPINAND_ECCINFO(&pn26g0xa_ooblayout,

				     pn26g0xa_ecc_get_status)),

	SPINAND_INFO("PN26G02A", 0xe2,

		     NAND_MEMORG(1, 2048, 128, 64, 2048, 41, 1, 1, 1),

		     NAND_ECCREQ(8, 512),

		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,

					      &write_cache_variants,

					      &update_cache_variants),

		     0,

		     SPINAND_ECCINFO(&pn26g0xa_ooblayout,

				     pn26g0xa_ecc_get_status)),

};



static int paragon_spinand_detect(struct spinand_device *spinand)

{

	u8 *id = spinand->id.data;

	int ret;



	/* Read ID returns [0][MID][DID] */



	if (id[1] != SPINAND_MFR_PARAGON)

		return 0;



	ret = spinand_match_and_init(spinand, paragon_spinand_table,

				     ARRAY_SIZE(paragon_spinand_table),

				     id[2]);

	if (ret)

		return ret;



	return 1;

}



static const struct spinand_manufacturer_ops paragon_spinand_manuf_ops = {

	.detect = paragon_spinand_detect,

};



const struct spinand_manufacturer paragon_spinand_manufacturer = {

	.id = SPINAND_MFR_PARAGON,

	.name = "Paragon",

	.ops = &paragon_spinand_manuf_ops,

};

include/linux/mtd/spinand.h

+1 −0
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@@ -227,6 +227,7 @@ struct spinand_manufacturer { 
extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;

extern const struct spinand_manufacturer macronix_spinand_manufacturer;

extern const struct spinand_manufacturer micron_spinand_manufacturer;

extern const struct spinand_manufacturer paragon_spinand_manufacturer;

extern const struct spinand_manufacturer toshiba_spinand_manufacturer;

extern const struct spinand_manufacturer winbond_spinand_manufacturer;

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