Update MTD to that of Linux 2.6.22.1

A lot changed in the Linux MTD code, since it was last ported from
Linux to U-Boot. This patch takes U-Boot NAND support to the level
of Linux 2.6.22.1 and will enable support for very large NAND devices
(4KB pages) and ease the compatibility between U-Boot and Linux
filesystems.

This patch is tested on two custom boards with PPC and ARM
processors running YAFFS in U-Boot and Linux using gcc-4.1.2
cross compilers.

MAKEALL ppc/arm has some issues:
 * DOC/OneNand/nand_spl is not building (I have not tried porting
   these parts, and since I do not have any HW and I am not familiar
   with this code/HW I think its best left to someone else.)

Except for the issues mentioned above, I have ported all drivers
necessary to run MAKEALL ppc/arm without errors and warnings. Many
drivers were trivial to port, but some were not so trivial. The
following drivers must be examined carefully and maybe rewritten to
some degree:
 cpu/ppc4xx/ndfc.c
 cpu/arm926ejs/davinci/nand.c
 board/delta/nand.c
 board/zylonite/nand.c

Signed-off-by: William Juul <william.juul@tandberg.com>
Signed-off-by: Stig Olsen <stig.olsen@tandberg.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>

1 files changed, 16 insertions, 18 deletions

diff --git a/board/tqc/tqm8272/tqm8272.c b/board/tqc/tqm8272/tqm8272.c
index cde0296..5148f3d 100644
--- a/board/tqc/tqm8272/tqm8272.c
+++ b/board/tqc/tqm8272/tqm8272.c
@@ -1068,24 +1068,22 @@ int update_flash_size (int flash_size)
 
 static u8 hwctl = 0;
 
-static void upmnand_hwcontrol(struct mtd_info *mtdinfo, int cmd)
+static void upmnand_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
 {
-	switch (cmd) {
-	case NAND_CTL_SETCLE:
-		hwctl |= 0x1;
-		break;
-	case NAND_CTL_CLRCLE:
-		hwctl &= ~0x1;
-		break;
-
-	case NAND_CTL_SETALE:
-		hwctl |= 0x2;
-		break;
-
-	case NAND_CTL_CLRALE:
-		hwctl &= ~0x2;
-		break;
+    struct nand_chip *this = mtd->priv;
+
+	if (ctrl & NAND_CTRL_CHANGE) {
+		if ( ctrl & NAND_CLE )
+			hwctl |= 0x1;
+		else
+			hwctl &= ~0x1;
+		if ( ctrl & NAND_ALE )
+			hwctl |= 0x2;
+		else
+			hwctl &= ~0x2;
 	}
+	if (cmd != NAND_CMD_NONE)
+		writeb(cmd, this->IO_ADDR_W);
 }
 
 static void upmnand_write_byte(struct mtd_info *mtdinfo, u_char byte)
@@ -1188,9 +1186,9 @@ int board_nand_init(struct nand_chip *nand)
 	memctl->memc_br3 = CFG_NAND_BR;
 	memctl->memc_mbmr = (MxMR_OP_NORM);
 
-	nand->eccmode = NAND_ECC_SOFT;
+	nand->ecc.mode = NAND_ECC_SOFT;
 
-	nand->hwcontrol	 = upmnand_hwcontrol;
+	nand->cmd_ctrl	 = upmnand_hwcontrol;
 	nand->read_byte	 = upmnand_read_byte;
 	nand->write_byte = upmnand_write_byte;
 	nand->dev_ready	 = tqm8272_dev_ready;