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authorWilliam Juul <william.juul@datarespons.no>2007-10-31 13:53:06 +0100
committerScott Wood <scottwood@freescale.com>2008-08-12 11:31:15 -0500
commitcfa460adfdefcc30d104e1a9ee44994ee349bb7b (patch)
tree59400f96629aec9c968b0e3251628302824f5d35 /board/dave/PPChameleonEVB/nand.c
parentcd82919e6c8a73b363a26f34b734923844e52d1c (diff)
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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>
Diffstat (limited to 'board/dave/PPChameleonEVB/nand.c')
-rw-r--r--board/dave/PPChameleonEVB/nand.c49
1 files changed, 23 insertions, 26 deletions
diff --git a/board/dave/PPChameleonEVB/nand.c b/board/dave/PPChameleonEVB/nand.c
index 09c0b04..4bc4257 100644
--- a/board/dave/PPChameleonEVB/nand.c
+++ b/board/dave/PPChameleonEVB/nand.c
@@ -21,7 +21,7 @@
*/
#include <common.h>
-
+#include <asm/io.h>
#if defined(CONFIG_CMD_NAND)
@@ -31,31 +31,28 @@
* hardware specific access to control-lines
* function borrowed from Linux 2.6 (drivers/mtd/nand/ppchameleonevb.c)
*/
-static void ppchameleonevb_hwcontrol(struct mtd_info *mtdinfo, int cmd)
+static void ppchameleonevb_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
- struct nand_chip *this = mtdinfo->priv;
+ struct nand_chip *this = mtd->priv;
ulong base = (ulong) this->IO_ADDR_W;
- switch(cmd) {
- case NAND_CTL_SETCLE:
- MACRO_NAND_CTL_SETCLE((unsigned long)base);
- break;
- case NAND_CTL_CLRCLE:
- MACRO_NAND_CTL_CLRCLE((unsigned long)base);
- break;
- case NAND_CTL_SETALE:
- MACRO_NAND_CTL_SETALE((unsigned long)base);
- break;
- case NAND_CTL_CLRALE:
- MACRO_NAND_CTL_CLRALE((unsigned long)base);
- break;
- case NAND_CTL_SETNCE:
- MACRO_NAND_ENABLE_CE((unsigned long)base);
- break;
- case NAND_CTL_CLRNCE:
- MACRO_NAND_DISABLE_CE((unsigned long)base);
- break;
+ if (ctrl & NAND_CTRL_CHANGE) {
+ if ( ctrl & NAND_CLE )
+ MACRO_NAND_CTL_SETCLE((unsigned long)base);
+ else
+ MACRO_NAND_CTL_CLRCLE((unsigned long)base);
+ if ( ctrl & NAND_ALE )
+ MACRO_NAND_CTL_CLRCLE((unsigned long)base);
+ else
+ MACRO_NAND_CTL_CLRALE((unsigned long)base);
+ if ( ctrl & NAND_NCE )
+ MACRO_NAND_ENABLE_CE((unsigned long)base);
+ else
+ MACRO_NAND_DISABLE_CE((unsigned long)base);
}
+
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, this->IO_ADDR_W);
}
@@ -92,11 +89,11 @@ static int ppchameleonevb_device_ready(struct mtd_info *mtdinfo)
* argument are board-specific (per include/linux/mtd/nand.h):
* - IO_ADDR_R?: address to read the 8 I/O lines of the flash device
* - IO_ADDR_W?: address to write the 8 I/O lines of the flash device
- * - hwcontrol: hardwarespecific function for accesing control-lines
+ * - cmd_ctrl: hardwarespecific function for accesing control-lines
* - dev_ready: hardwarespecific function for accesing device ready/busy line
* - enable_hwecc?: function to enable (reset) hardware ecc generator. Must
* only be provided if a hardware ECC is available
- * - eccmode: mode of ecc, see defines
+ * - ecc.mode: mode of ecc, see defines
* - chip_delay: chip dependent delay for transfering data from array to
* read regs (tR)
* - options: various chip options. They can partly be set to inform
@@ -108,9 +105,9 @@ static int ppchameleonevb_device_ready(struct mtd_info *mtdinfo)
int board_nand_init(struct nand_chip *nand)
{
- nand->hwcontrol = ppchameleonevb_hwcontrol;
+ nand->cmd_ctrl = ppchameleonevb_hwcontrol;
nand->dev_ready = ppchameleonevb_device_ready;
- nand->eccmode = NAND_ECC_SOFT;
+ nand->ecc.mode = NAND_ECC_SOFT;
nand->chip_delay = NAND_BIG_DELAY_US;
nand->options = NAND_SAMSUNG_LP_OPTIONS;
return 0;