mediatek: add a new spi-nand driver for kernel 5.10

This patch adds a new spi-nand driver which implements the SNFI of mt7622
and mt7629.

Unlike the existing snfi driver which makes use of the spi-mem framework
and the spi-nand framework with modified ecc support, this driver is
implemented directly on the mtd framework with other components untouched,
and provides better performance, and behaves exactly the same as the nand
framework.

Signed-off-by: Weijie Gao <hackpascal@gmail.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/target/linux/mediatek/files-5.10/drivers/mtd/mtk-snand/mtk-snand.h b/target/linux/mediatek/files-5.10/drivers/mtd/mtk-snand/mtk-snand.h
new file mode 100644
index 0000000000..73c5cc60c9
--- /dev/null
+++ b/target/linux/mediatek/files-5.10/drivers/mtd/mtk-snand/mtk-snand.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/*
+ * Copyright (C) 2020 MediaTek Inc. All Rights Reserved.
+ *
+ * Author: Weijie Gao <weijie.gao@mediatek.com>
+ */
+
+#ifndef _MTK_SNAND_H_
+#define _MTK_SNAND_H_
+
+#ifndef PRIVATE_MTK_SNAND_HEADER
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+#endif
+
+enum mtk_snand_soc {
+	SNAND_SOC_MT7622,
+	SNAND_SOC_MT7629,
+
+	__SNAND_SOC_MAX
+};
+
+struct mtk_snand_platdata {
+	void *nfi_base;
+	void *ecc_base;
+	enum mtk_snand_soc soc;
+	bool quad_spi;
+};
+
+struct mtk_snand_chip_info {
+	const char *model;
+	uint64_t chipsize;
+	uint32_t blocksize;
+	uint32_t pagesize;
+	uint32_t sparesize;
+	uint32_t spare_per_sector;
+	uint32_t fdm_size;
+	uint32_t fdm_ecc_size;
+	uint32_t num_sectors;
+	uint32_t sector_size;
+	uint32_t ecc_strength;
+	uint32_t ecc_bytes;
+};
+
+struct mtk_snand;
+struct snand_flash_info;
+
+int mtk_snand_init(void *dev, const struct mtk_snand_platdata *pdata,
+		   struct mtk_snand **psnf);
+int mtk_snand_cleanup(struct mtk_snand *snf);
+
+int mtk_snand_chip_reset(struct mtk_snand *snf);
+int mtk_snand_read_page(struct mtk_snand *snf, uint64_t addr, void *buf,
+			void *oob, bool raw);
+int mtk_snand_write_page(struct mtk_snand *snf, uint64_t addr, const void *buf,
+			 const void *oob, bool raw);
+int mtk_snand_erase_block(struct mtk_snand *snf, uint64_t addr);
+int mtk_snand_block_isbad(struct mtk_snand *snf, uint64_t addr);
+int mtk_snand_block_markbad(struct mtk_snand *snf, uint64_t addr);
+int mtk_snand_fill_oob(struct mtk_snand *snf, uint8_t *oobraw,
+		       const uint8_t *oobbuf, size_t ooblen);
+int mtk_snand_transfer_oob(struct mtk_snand *snf, uint8_t *oobbuf,
+			   size_t ooblen, const uint8_t *oobraw);
+int mtk_snand_read_page_auto_oob(struct mtk_snand *snf, uint64_t addr,
+				 void *buf, void *oob, size_t ooblen,
+				 size_t *actualooblen, bool raw);
+int mtk_snand_write_page_auto_oob(struct mtk_snand *snf, uint64_t addr,
+				  const void *buf, const void *oob,
+				  size_t ooblen, size_t *actualooblen,
+				  bool raw);
+int mtk_snand_get_chip_info(struct mtk_snand *snf,
+			    struct mtk_snand_chip_info *info);
+int mtk_snand_irq_process(struct mtk_snand *snf);
+
+#endif /* _MTK_SNAND_H_ */