[U-Boot] [RFC PATCH 5/8] NAND: omap_gpmc.c: add nand_spl support

[John Rigby]

Signed-off-by: John Rigby <john.rigby at linaro.org>
CC: Scott Wood <scootwood at freescale.com>
---
 drivers/mtd/nand/omap_gpmc.c |   36 ++++++++++++++++++++++++++++++++++++
 1 files changed, 36 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/nand/omap_gpmc.c b/drivers/mtd/nand/omap_gpmc.c
index 99b9cef..4c76544 100644
--- a/drivers/mtd/nand/omap_gpmc.c
+++ b/drivers/mtd/nand/omap_gpmc.c
@@ -29,6 +29,28 @@
 #include <linux/mtd/nand_ecc.h>
 #include <nand.h>
 
+#ifdef CONFIG_NAND_SPL
+/* in the early stage of NAND flash booting, printf() is not available */
+#define printf(fmt, args...)
+
+static void nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
+{
+	int i;
+	struct nand_chip *chip = mtd->priv;
+
+#ifndef CONFIG_SYS_NAND_BUSWIDTH_16
+	for (i = 0; i < len; i++)
+		buf[i] = readb(chip->IO_ADDR_R);
+#else
+	u16 *p = (u16 *) buf;
+
+	len >>= 1;
+	for (i = 0; i < len; i++)
+		p[i] = readw(chip->IO_ADDR_R);
+#endif
+}
+#endif
+
 static uint8_t cs;
 static struct nand_ecclayout hw_nand_oob = GPMC_NAND_HW_ECC_LAYOUT;
 
@@ -224,6 +246,7 @@ static void omap_enable_hwecc(struct mtd_info *mtd, int32_t mode)
 	}
 }
 
+#ifndef CONFIG_NAND_SPL
 /*
  * omap_nand_switch_ecc - switch the ECC operation b/w h/w ecc and s/w ecc.
  * The default is to come up on s/w ecc
@@ -280,6 +303,7 @@ void omap_nand_switch_ecc(int32_t hardware)
 
 	nand->options &= ~NAND_OWN_BUFFERS;
 }
+#endif
 
 /*
  * Board-specific NAND initialization. The following members of the
@@ -337,8 +361,20 @@ int board_nand_init(struct nand_chip *nand)
 		nand->options |= NAND_BUSWIDTH_16;
 
 	nand->chip_delay = 100;
+#ifndef CONFIG_NAND_SPL
 	/* Default ECC mode */
 	nand->ecc.mode = NAND_ECC_SOFT;
+#else
+        nand->ecc.mode = NAND_ECC_HW;
+        nand->ecc.layout = &hw_nand_oob;
+        nand->ecc.size = 512;
+        nand->ecc.bytes = 3;
+        nand->ecc.hwctl = omap_enable_hwecc;
+        nand->ecc.correct = omap_correct_data;
+        nand->ecc.calculate = omap_calculate_ecc;
+	nand->read_buf = nand_read_buf;
+        omap_hwecc_init(nand);
+#endif
 
 	return 0;
 }
-- 
1.7.3.1.120.g38a18