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authorDavid Brownell <dbrownell@users.sourceforge.net>2009-05-10 15:43:01 -0700
committerScott Wood <scottwood@freescale.com>2009-07-07 17:58:03 -0500
commit154b5484ac7dcbcd0fb5ba388d930b02f87fa302 (patch)
tree84e4960c2c10d441ec2a287447214d8ae51ac194 /board/davinci/sonata
parent496863b2440dd7cd69a1ad2443a9badd5f8968d1 (diff)
downloadu-boot-linaro-stable-154b5484ac7dcbcd0fb5ba388d930b02f87fa302.tar.gz
davinci_nand chipselect/init cleanup
Update chipselect handling in davinci_nand.c so that it can handle 2 GByte chips the same way Linux does: as one device, even though it has two halves with independent chip selects. For such chips the "nand info" command reports: Device 0: 2x nand0, sector size 128 KiB Switch to use the default chipselect function unless the board really needs its own. The logic for the Sonata board moves out of the driver into board-specific code. (Which doesn't affect current build breakage if its NAND support is enabled...) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'board/davinci/sonata')
-rw-r--r--board/davinci/sonata/sonata.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/board/davinci/sonata/sonata.c b/board/davinci/sonata/sonata.c
index 7f9d9bba3..817970aea 100644
--- a/board/davinci/sonata/sonata.c
+++ b/board/davinci/sonata/sonata.c
@@ -25,6 +25,8 @@
*/
#include <common.h>
+#include <nand.h>
+#include <asm/arch/nand_defs.h>
#include <asm/arch/hardware.h>
#include "../common/misc.h"
@@ -72,3 +74,29 @@ int misc_init_r(void)
return(0);
}
+
+#ifdef CONFIG_NAND_DAVINCI
+
+/* Set WP on deselect, write enable on select */
+static void nand_sonata_select_chip(struct mtd_info *mtd, int chip)
+{
+#define GPIO_SET_DATA01 0x01c67018
+#define GPIO_CLR_DATA01 0x01c6701c
+#define GPIO_NAND_WP (1 << 4)
+#ifdef SONATA_BOARD_GPIOWP
+ if (chip < 0) {
+ REG(GPIO_CLR_DATA01) |= GPIO_NAND_WP;
+ } else {
+ REG(GPIO_SET_DATA01) |= GPIO_NAND_WP;
+ }
+#endif
+}
+
+int board_nand_init(struct nand_chip *nand)
+{
+ davinci_nand_init(nand);
+ nand->select_chip = nand_sonata_select_chip;
+ return 0;
+}
+
+#endif /* CONFIG_NAND_DAVINCI */