aboutsummaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-davinci/board-dm644x-evm.c42
1 files changed, 36 insertions, 6 deletions
diff --git a/arch/arm/mach-davinci/board-dm644x-evm.c b/arch/arm/mach-davinci/board-dm644x-evm.c
index 5387e6b2040..c039674fe99 100644
--- a/arch/arm/mach-davinci/board-dm644x-evm.c
+++ b/arch/arm/mach-davinci/board-dm644x-evm.c
@@ -16,11 +16,12 @@
#include <linux/gpio.h>
#include <linux/leds.h>
#include <linux/memory.h>
+#include <linux/etherdevice.h>
#include <linux/i2c.h>
#include <linux/i2c/pcf857x.h>
#include <linux/i2c/at24.h>
-#include <linux/etherdevice.h>
+
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
@@ -113,20 +114,49 @@ static struct platform_device davinci_evm_norflash_device = {
.resource = &davinci_evm_norflash_resource,
};
+/* DM644x EVM includes a 64 MByte small-page NAND flash (16K blocks).
+ * It may used instead of the (default) NOR chip to boot, using TI's
+ * tools to install the secondary boot loader (UBL) and U-Boot.
+ */
struct mtd_partition davinci_evm_nandflash_partition[] = {
- /* 5 MB space at the beginning for bootloader and kernel */
+ /* Bootloader layout depends on whose u-boot is installed, but we
+ * can hide all the details.
+ * - block 0 for u-boot environment ... in mainline u-boot
+ * - block 1 for UBL (plus up to four backup copies in blocks 2..5)
+ * - blocks 6...? for u-boot
+ * - blocks 16..23 for u-boot environment ... in TI's u-boot
+ */
+ {
+ .name = "bootloader",
+ .offset = 0,
+ .size = SZ_256K + SZ_128K,
+ .mask_flags = MTD_WRITEABLE, /* force read-only */
+ },
+ /* Kernel */
{
- .name = "NAND filesystem",
- .offset = 5 * SZ_1M,
+ .name = "kernel",
+ .offset = MTDPART_OFS_APPEND,
+ .size = SZ_4M,
+ .mask_flags = 0,
+ },
+ /* File system (older GIT kernels started this on the 5MB mark) */
+ {
+ .name = "filesystem",
+ .offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL,
.mask_flags = 0,
}
+ /* A few blocks at end hold a flash BBT ... created by TI's CCS
+ * using flashwriter_nand.out, but ignored by TI's versions of
+ * Linux and u-boot. We boot faster by using them.
+ */
};
static struct davinci_nand_pdata davinci_evm_nandflash_data = {
.parts = davinci_evm_nandflash_partition,
.nr_parts = ARRAY_SIZE(davinci_evm_nandflash_partition),
.ecc_mode = NAND_ECC_HW,
+ .options = NAND_USE_FLASH_BBT,
};
static struct resource davinci_evm_nandflash_resource[] = {
@@ -151,14 +181,14 @@ static struct platform_device davinci_evm_nandflash_device = {
.resource = davinci_evm_nandflash_resource,
};
-static u64 davinci_fb_dma_mask = DMA_32BIT_MASK;
+static u64 davinci_fb_dma_mask = DMA_BIT_MASK(32);
static struct platform_device davinci_fb_device = {
.name = "davincifb",
.id = -1,
.dev = {
.dma_mask = &davinci_fb_dma_mask,
- .coherent_dma_mask = DMA_32BIT_MASK,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
},
.num_resources = 0,
};