X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=drivers%2Fmtd%2Fnand%2Fnand_base.c;h=b025001337e1fd0c8806461753e699a9d06a4aad;hb=a0e80c97c9ba1409c2370f6c8b2a4d6a48cdb15c;hp=74c563c49556f4483b0bcdabf88cabe87006edc9;hpb=d77fa2ff766bbb4b867e791187f78b6033071613;p=oweals%2Fu-boot.git

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 74c563c495..b025001337 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -29,6 +29,9 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 #include <common.h>
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+#include <fdtdec.h>
+#endif
 #include <malloc.h>
 #include <watchdog.h>
 #include <linux/err.h>
@@ -41,7 +44,7 @@
 #include <linux/mtd/partitions.h>
 #endif
 #include <asm/io.h>
-#include <asm/errno.h>
+#include <linux/errno.h>
 
 /* Define default oob placement schemes for large and small page devices */
 static struct nand_ecclayout nand_oob_8 = {
@@ -238,7 +241,6 @@ static void nand_write_byte16(struct mtd_info *mtd, uint8_t byte)
 	chip->write_buf(mtd, (uint8_t *)&word, 2);
 }
 
-#if !defined(CONFIG_BLACKFIN)
 static void iowrite8_rep(void *addr, const uint8_t *buf, int len)
 {
 	int i;
@@ -271,7 +273,6 @@ static void iowrite16_rep(void *addr, void *buf, int len)
         for (i = 0; i < len; i++)
                 writew(p[i], addr);
 }
-#endif
 
 /**
  * nand_write_buf - [DEFAULT] write buffer to chip
@@ -862,7 +863,6 @@ static void panic_nand_wait(struct mtd_info *mtd, struct nand_chip *chip,
  */
 static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip)
 {
-
 	int status;
 	unsigned long timeo = 400;
 
@@ -2412,7 +2412,7 @@ static int nand_do_write_ops(struct mtd_info *mtd, loff_t to,
 		int cached = writelen > bytes && page != blockmask;
 		uint8_t *wbuf = buf;
 		int use_bufpoi;
-		int part_pagewr = (column || writelen < (mtd->writesize - 1));
+		int part_pagewr = (column || writelen < mtd->writesize);
 
 		if (part_pagewr)
 			use_bufpoi = 1;
@@ -3764,6 +3764,66 @@ ident_done:
 	return type;
 }
 
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+DECLARE_GLOBAL_DATA_PTR;
+
+static int nand_dt_init(struct mtd_info *mtd, struct nand_chip *chip, int node)
+{
+	int ret, ecc_mode = -1, ecc_strength, ecc_step;
+	const void *blob = gd->fdt_blob;
+	const char *str;
+
+	ret = fdtdec_get_int(blob, node, "nand-bus-width", -1);
+	if (ret == 16)
+		chip->options |= NAND_BUSWIDTH_16;
+
+	if (fdtdec_get_bool(blob, node, "nand-on-flash-bbt"))
+		chip->bbt_options |= NAND_BBT_USE_FLASH;
+
+	str = fdt_getprop(blob, node, "nand-ecc-mode", NULL);
+	if (str) {
+		if (!strcmp(str, "none"))
+			ecc_mode = NAND_ECC_NONE;
+		else if (!strcmp(str, "soft"))
+			ecc_mode = NAND_ECC_SOFT;
+		else if (!strcmp(str, "hw"))
+			ecc_mode = NAND_ECC_HW;
+		else if (!strcmp(str, "hw_syndrome"))
+			ecc_mode = NAND_ECC_HW_SYNDROME;
+		else if (!strcmp(str, "hw_oob_first"))
+			ecc_mode = NAND_ECC_HW_OOB_FIRST;
+		else if (!strcmp(str, "soft_bch"))
+			ecc_mode = NAND_ECC_SOFT_BCH;
+	}
+
+
+	ecc_strength = fdtdec_get_int(blob, node, "nand-ecc-strength", -1);
+	ecc_step = fdtdec_get_int(blob, node, "nand-ecc-step-size", -1);
+
+	if ((ecc_step >= 0 && !(ecc_strength >= 0)) ||
+	    (!(ecc_step >= 0) && ecc_strength >= 0)) {
+		pr_err("must set both strength and step size in DT\n");
+		return -EINVAL;
+	}
+
+	if (ecc_mode >= 0)
+		chip->ecc.mode = ecc_mode;
+
+	if (ecc_strength >= 0)
+		chip->ecc.strength = ecc_strength;
+
+	if (ecc_step > 0)
+		chip->ecc.size = ecc_step;
+
+	return 0;
+}
+#else
+static int nand_dt_init(struct mtd_info *mtd, struct nand_chip *chip, int node)
+{
+	return 0;
+}
+#endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
+
 /**
  * nand_scan_ident - [NAND Interface] Scan for the NAND device
  * @mtd: MTD device structure
@@ -3780,6 +3840,13 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips,
 	int i, nand_maf_id, nand_dev_id;
 	struct nand_chip *chip = mtd_to_nand(mtd);
 	struct nand_flash_dev *type;
+	int ret;
+
+	if (chip->flash_node) {
+		ret = nand_dt_init(mtd, chip, chip->flash_node);
+		if (ret)
+			return ret;
+	}
 
 	/* Set the default functions */
 	nand_set_defaults(chip, chip->options & NAND_BUSWIDTH_16);