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author | William Juul <william.juul@datarespons.no> | 2007-10-31 13:53:06 +0100 |
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committer | Scott Wood <scottwood@freescale.com> | 2008-08-12 11:31:15 -0500 |
commit | cfa460adfdefcc30d104e1a9ee44994ee349bb7b (patch) | |
tree | 59400f96629aec9c968b0e3251628302824f5d35 /board/nc650 | |
parent | cd82919e6c8a73b363a26f34b734923844e52d1c (diff) | |
download | bootable_bootloader_goldelico_gta04-cfa460adfdefcc30d104e1a9ee44994ee349bb7b.zip bootable_bootloader_goldelico_gta04-cfa460adfdefcc30d104e1a9ee44994ee349bb7b.tar.gz bootable_bootloader_goldelico_gta04-cfa460adfdefcc30d104e1a9ee44994ee349bb7b.tar.bz2 |
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/nc650')
-rw-r--r-- | board/nc650/nand.c | 78 |
1 files changed, 35 insertions, 43 deletions
diff --git a/board/nc650/nand.c b/board/nc650/nand.c index 8617f74..faec605 100644 --- a/board/nc650/nand.c +++ b/board/nc650/nand.c @@ -22,7 +22,7 @@ */ #include <common.h> - +#include <asm/io.h> #if defined(CONFIG_CMD_NAND) @@ -32,57 +32,49 @@ /* * hardware specific access to control-lines */ -static void nc650_hwcontrol(struct mtd_info *mtd, int cmd) +static void nc650_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl) { struct nand_chip *this = mtd->priv; - switch(cmd) { - case NAND_CTL_SETCLE: - this->IO_ADDR_W += 2; - break; - case NAND_CTL_CLRCLE: - this->IO_ADDR_W -= 2; - break; - case NAND_CTL_SETALE: - this->IO_ADDR_W += 1; - break; - case NAND_CTL_CLRALE: - this->IO_ADDR_W -= 1; - break; - case NAND_CTL_SETNCE: - case NAND_CTL_CLRNCE: - /* nop */ - break; + if (ctrl & NAND_CTRL_CHANGE) { + if ( ctrl & NAND_CLE ) + this->IO_ADDR_W += 2; + else + this->IO_ADDR_W -= 2; + if ( ctrl & NAND_ALE ) + this->IO_ADDR_W += 1; + else + this->IO_ADDR_W -= 1; } + + if (cmd != NAND_CMD_NONE) + writeb(cmd, this->IO_ADDR_W); } #elif defined(CONFIG_IDS852_REV2) /* * hardware specific access to control-lines */ -static void nc650_hwcontrol(struct mtd_info *mtd, int cmd) +static void nc650_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl) { struct nand_chip *this = mtd->priv; - switch(cmd) { - case NAND_CTL_SETCLE: - *(((volatile __u8 *) this->IO_ADDR_W) + 0xa) = 0; - break; - case NAND_CTL_CLRCLE: - *(((volatile __u8 *) this->IO_ADDR_W) + 0x8) = 0; - break; - case NAND_CTL_SETALE: - *(((volatile __u8 *) this->IO_ADDR_W) + 0x9) = 0; - break; - case NAND_CTL_CLRALE: - *(((volatile __u8 *) this->IO_ADDR_W) + 0x8) = 0; - break; - case NAND_CTL_SETNCE: - *(((volatile __u8 *) this->IO_ADDR_W) + 0x8) = 0; - break; - case NAND_CTL_CLRNCE: - *(((volatile __u8 *) this->IO_ADDR_W) + 0xc) = 0; - break; + if (ctrl & NAND_CTRL_CHANGE) { + if ( ctrl & NAND_CLE ) + writeb(0, (volatile __u8 *) this->IO_ADDR_W + 0xa); + else + writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0x8); + if ( ctrl & NAND_ALE ) + writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0x9); + else + writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0x8); + if ( ctrl & NAND_NCE ) + writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0x8); + else + writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0xc); } + + if (cmd != NAND_CMD_NONE) + writeb(cmd, this->IO_ADDR_W); } #else #error Unknown IDS852 module revision @@ -93,11 +85,11 @@ static void nc650_hwcontrol(struct mtd_info *mtd, int cmd) * 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 + * - eccm.ode: 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 @@ -109,8 +101,8 @@ static void nc650_hwcontrol(struct mtd_info *mtd, int cmd) int board_nand_init(struct nand_chip *nand) { - nand->hwcontrol = nc650_hwcontrol; - nand->eccmode = NAND_ECC_SOFT; + nand->cmd_ctrl = nc650_hwcontrol; + nand->ecc.mode = NAND_ECC_SOFT; nand->chip_delay = 12; /* nand->options = NAND_SAMSUNG_LP_OPTIONS;*/ return 0; |