From 5cb31780791d0f6b68e3712f1b35f1a28c47add0 Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@free-electrons.com>
Date: Tue, 21 Oct 2014 14:37:15 +0200
Subject: [PATCH] mtd: nand: sunxi: Add NAND partition support
Add NAND partition support to the sunxi_nand driver.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/mtd/nand/Kconfig | 1 +
drivers/mtd/nand/sunxi_nand.c | 73 +++++++++++++++++++++++++++++++++++++------
2 files changed, 65 insertions(+), 9 deletions(-)
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -525,6 +525,7 @@ config MTD_NAND_XWAY
config MTD_NAND_SUNXI
tristate "Support for NAND on Allwinner SoCs"
depends on ARCH_SUNXI
+ select MTD_OF_NAND_PARTS
help
Enables support for NAND Flash chips on Allwinner SoCs.
--- a/drivers/mtd/nand/sunxi_nand.c
+++ b/drivers/mtd/nand/sunxi_nand.c
@@ -206,6 +206,23 @@ struct sunxi_nand_hw_ecc {
};
/*
+ * sunxi NAND partition structure: stores NAND partitions information
+ *
+ * @part: base paritition structure
+ * @ecc: per-partition ECC info
+ */
+struct sunxi_nand_part {
+ struct nand_part part;
+ struct nand_ecc_ctrl ecc;
+};
+
+static inline struct sunxi_nand_part *
+to_sunxi_nand_part(struct nand_part *part)
+{
+ return container_of(part, struct sunxi_nand_part, part);
+}
+
+/*
* NAND chip structure: stores NAND chip device related information
*
* @node: used to store NAND chips into a list
@@ -525,7 +542,7 @@ static int sunxi_nfc_hw_ecc_read_page(st
int oob_required, int page)
{
struct sunxi_nfc *nfc = to_sunxi_nfc(chip->controller);
- struct nand_ecc_ctrl *ecc = &chip->ecc;
+ struct nand_ecc_ctrl *ecc = chip->cur_ecc;
struct nand_ecclayout *layout = ecc->layout;
struct sunxi_nand_hw_ecc *data = ecc->priv;
unsigned int max_bitflips = 0;
@@ -611,7 +628,7 @@ static int sunxi_nfc_hw_ecc_write_page(s
const uint8_t *buf, int oob_required)
{
struct sunxi_nfc *nfc = to_sunxi_nfc(chip->controller);
- struct nand_ecc_ctrl *ecc = &chip->ecc;
+ struct nand_ecc_ctrl *ecc = chip->cur_ecc;
struct nand_ecclayout *layout = ecc->layout;
struct sunxi_nand_hw_ecc *data = ecc->priv;
int offset;
@@ -679,7 +696,7 @@ static int sunxi_nfc_hw_syndrome_ecc_rea
int page)
{
struct sunxi_nfc *nfc = to_sunxi_nfc(chip->controller);
- struct nand_ecc_ctrl *ecc = &chip->ecc;
+ struct nand_ecc_ctrl *ecc = chip->cur_ecc;
struct sunxi_nand_hw_ecc *data = ecc->priv;
unsigned int max_bitflips = 0;
uint8_t *oob = chip->oob_poi;
@@ -747,7 +764,7 @@ static int sunxi_nfc_hw_syndrome_ecc_wri
int oob_required)
{
struct sunxi_nfc *nfc = to_sunxi_nfc(chip->controller);
- struct nand_ecc_ctrl *ecc = &chip->ecc;
+ struct nand_ecc_ctrl *ecc = chip->cur_ecc;
struct sunxi_nand_hw_ecc *data = ecc->priv;
uint8_t *oob = chip->oob_poi;
int offset = 0;
@@ -1091,8 +1108,13 @@ static int sunxi_nand_ecc_init(struct mt
ecc->strength = nand->ecc_strength_ds;
}
- if (!ecc->size || !ecc->strength)
- return -EINVAL;
+ if (!ecc->size || !ecc->strength) {
+ if (ecc == &nand->ecc)
+ return -EINVAL;
+
+ ecc->size = nand->ecc.size;
+ ecc->strength = nand->ecc.strength;
+ }
ecc->mode = NAND_ECC_HW;
@@ -1127,12 +1149,39 @@ static int sunxi_nand_ecc_init(struct mt
return 0;
}
+static void sunxi_nand_part_release(struct nand_part *part)
+{
+ kfree(to_sunxi_nand_part(part));
+}
+
+struct nand_part *sunxi_ofnandpart_parse(void *priv, struct mtd_info *master,
+ struct device_node *pp)
+{
+ struct sunxi_nand_part *part;
+ int ret;
+
+ part = kzalloc(sizeof(*part), GFP_KERNEL);
+ part->part.release = sunxi_nand_part_release;
+
+ ret = sunxi_nand_ecc_init(master, &part->ecc, pp);
+ if (ret)
+ goto err;
+
+ part->part.ecc = &part->ecc;
+
+ return &part->part;
+
+err:
+ kfree(part);
+ return ERR_PTR(ret);
+}
+
static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
struct device_node *np)
{
const struct nand_sdr_timings *timings;
struct sunxi_nand_chip *chip;
- struct mtd_part_parser_data ppdata;
+ struct ofnandpart_data ppdata;
struct mtd_info *mtd;
struct nand_chip *nand;
int nsels;
@@ -1261,8 +1310,14 @@ static int sunxi_nand_chip_init(struct d
return ret;
}
- ppdata.of_node = np;
- ret = mtd_device_parse_register(mtd, NULL, &ppdata, NULL, 0);
+ ppdata.node = np;
+ ppdata.parse = sunxi_ofnandpart_parse;
+ ret = ofnandpart_parse(mtd, &ppdata);
+ if (!ret)
+ ret = mtd_device_register(mtd, NULL, 0);
+ else if (ret > 0)
+ ret = 0;
+
if (ret) {
dev_err(dev, "failed to register mtd device: %d\n", ret);
nand_release(mtd);