openwrt/target/linux/sunxi/patches-4.1/116-mtd-add-vendor-specific-initcode-infra.patch

From 95430662a26332474f4a03a7f8f44fd8d80890b3 Mon Sep 17 00:00:00 2001
From: Boris BREZILLON <b.brezillon.dev@gmail.com>
Date: Mon, 24 Feb 2014 16:28:32 +0100
Subject: [PATCH] mtd: nand: Add manufacturer specific init code infrastructure

Add new fields in nand_manufacturers and nand_chip struct to provide
manufacturer specific handling like read retries.

Signed-off-by: Boris BREZILLON <b.brezillon.dev@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/mtd/nand/nand_base.c | 7 +++++++
 include/linux/mtd/nand.h     | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 577cb9e..51642c6 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -4382,6 +4382,13 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
 	if (mtd->writesize > 512 && chip->cmdfunc == nand_command)
 		chip->cmdfunc = nand_command_lp;
 
+	if (nand_manuf_ids[maf_idx].init) {
+		int err;
+		err = nand_manuf_ids[maf_idx].init(mtd, id_data);
+		if (err)
+			return ERR_PTR(err);
+	}
+
 	pr_info("device found, Manufacturer ID: 0x%02x, Chip ID: 0x%02x\n",
 		*maf_id, *dev_id);
 
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 6cbd06a3..5844d6f 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -748,6 +748,9 @@ struct nand_chip {
 	int (*onfi_get_features)(struct mtd_info *mtd, struct nand_chip *chip,
 			int feature_addr, uint8_t *subfeature_para);
 	int (*setup_read_retry)(struct mtd_info *mtd, int retry_mode);
+	void (*manuf_cleanup)(struct mtd_info *mtd);
+
+	void *manuf_priv;
 
 	int chip_delay;
 	unsigned int options;
@@ -950,6 +953,7 @@ struct nand_flash_dev {
 struct nand_manufacturers {
 	int id;
 	char *name;
+	int (*init)(struct mtd_info *mtd, const uint8_t *id);
 };
 
 extern struct nand_flash_dev nand_flash_ids[];