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>
diff --git a/board/bf537-stamp/nand.c b/board/bf537-stamp/nand.c
index 6ff0f4f..bdf1d6e 100644
--- a/board/bf537-stamp/nand.c
+++ b/board/bf537-stamp/nand.c
@@ -37,34 +37,29 @@
/*
* hardware specific access to control-lines
*/
-static void bfin_hwcontrol(struct mtd_info *mtd, int cmd)
+static void bfin_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
register struct nand_chip *this = mtd->priv;
+ u32 IO_ADDR_W = (u32) this->IO_ADDR_W;
- switch (cmd) {
-
- case NAND_CTL_SETCLE:
- this->IO_ADDR_W = CFG_NAND_BASE + BFIN_NAND_CLE;
- break;
- case NAND_CTL_CLRCLE:
- this->IO_ADDR_W = CFG_NAND_BASE;
- break;
-
- case NAND_CTL_SETALE:
- this->IO_ADDR_W = CFG_NAND_BASE + BFIN_NAND_ALE;
- break;
- case NAND_CTL_CLRALE:
- this->IO_ADDR_W = CFG_NAND_BASE;
- break;
- case NAND_CTL_SETNCE:
- case NAND_CTL_CLRNCE:
- break;
+ if (ctrl & NAND_CTRL_CHANGE) {
+ if( ctrl & NAND_CLE )
+ IO_ADDR_W = CFG_NAND_BASE + BFIN_NAND_CLE;
+ else
+ IO_ADDR_W = CFG_NAND_BASE;
+ if( ctrl & NAND_ALE )
+ IO_ADDR_W = CFG_NAND_BASE + BFIN_NAND_ALE;
+ else
+ IO_ADDR_W = CFG_NAND_BASE;
+ this->IO_ADDR_W = (void __iomem *) IO_ADDR_W;
}
-
this->IO_ADDR_R = this->IO_ADDR_W;
/* Drain the writebuffer */
SSYNC();
+
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, this->IO_ADDR_W);
}
int bfin_device_ready(struct mtd_info *mtd)
@@ -79,11 +74,11 @@
* 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
@@ -98,8 +93,8 @@
*PORT(CONFIG_NAND_GPIO_PORT, IO_DIR) &= ~BFIN_NAND_READY;
*PORT(CONFIG_NAND_GPIO_PORT, IO_INEN) |= BFIN_NAND_READY;
- nand->hwcontrol = bfin_hwcontrol;
- nand->eccmode = NAND_ECC_SOFT;
+ nand->cmd_ctrl = bfin_hwcontrol;
+ nand->ecc.mode = NAND_ECC_SOFT;
nand->dev_ready = bfin_device_ready;
nand->chip_delay = 30;
}