OpenWrt – Rev 4
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From e17398316e82d8b28217232b4fd6030c65138e74 Mon Sep 17 00:00:00 2001
From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Date: Mon, 12 Aug 2013 01:18:00 +0200
Subject: MIPS: lantiq: add NAND SPL support
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
--- a/arch/mips/cpu/mips32/lantiq-common/spl.c
+++ b/arch/mips/cpu/mips32/lantiq-common/spl.c
@@ -8,6 +8,7 @@
#include <image.h>
#include <version.h>
#include <spi_flash.h>
+#include <nand.h>
#include <linux/compiler.h>
#include <lzma/LzmaDec.h>
#include <linux/lzo.h>
@@ -63,6 +64,18 @@
#define spl_boot_nor_flash 0
#endif
+#if defined(CONFIG_LTQ_SUPPORT_SPL_NAND_FLASH) && defined(CONFIG_SYS_BOOT_NANDSPL)
+#define spl_boot_nand_flash 1
+#else
+#define spl_boot_nand_flash 0
+#ifndef CONFIG_SYS_NAND_U_BOOT_OFFS
+#define CONFIG_SYS_NAND_U_BOOT_OFFS 0
+#endif
+#ifndef CONFIG_SYS_NAND_PAGE_SIZE
+#define CONFIG_SYS_NAND_PAGE_SIZE 0
+#endif
+#endif
+
#define spl_sync() __asm__ __volatile__("sync");
struct spl_image {
@@ -337,6 +350,58 @@ static int spl_load_nor_flash(struct spl
return ret;
}
+static int spl_load_nand_flash(struct spl_image *spl)
+{
+ image_header_t *hdr;
+ int ret;
+ unsigned long loadaddr;
+
+ /*
+ * Image format:
+ *
+ * - 12 byte non-volatile bootstrap header
+ * - SPL binary
+ * - 12 byte non-volatile bootstrap header
+ * - padding bytes up to CONFIG_SYS_NAND_U_BOOT_OFFS
+ * - 64 byte U-Boot mkimage header
+ * - U-Boot binary
+ */
+ spl->data_addr = CONFIG_SYS_NAND_U_BOOT_OFFS;
+
+ spl_puts("SPL: initializing NAND flash\n");
+ nand_init();
+
+ spl_debug("SPL: reading image header at page offset %lx\n",
+ spl->data_addr);
+
+ hdr = (image_header_t *) CONFIG_LOADADDR;
+ ret = nand_spl_load_image(spl->data_addr,
+ CONFIG_SYS_NAND_PAGE_SIZE, hdr);
+ if (ret)
+ return ret;
+
+ spl_debug("SPL: checking image header at address %p\n", hdr);
+
+ ret = spl_parse_image(hdr, spl);
+ if (ret)
+ return ret;
+
+ if (spl_is_compressed(spl))
+ loadaddr = CONFIG_LOADADDR;
+ else
+ loadaddr = spl->entry_addr;
+
+ spl_puts("SPL: loading U-Boot to RAM\n");
+
+ ret = nand_spl_load_image(spl->data_addr, spl->data_size,
+ (void *) loadaddr);
+
+ if (spl_is_compressed(spl))
+ ret = spl_uncompress(spl, loadaddr);
+
+ return ret;
+}
+
static int spl_load(struct spl_image *spl)
{
int ret;
@@ -345,6 +410,8 @@ static int spl_load(struct spl_image *sp
ret = spl_load_spi_flash(spl);
else if (spl_boot_nor_flash)
ret = spl_load_nor_flash(spl);
+ else if (spl_boot_nand_flash)
+ ret = spl_load_nand_flash(spl);
else
ret = 1;
--- a/arch/mips/include/asm/lantiq/config.h
+++ b/arch/mips/include/asm/lantiq/config.h
@@ -40,6 +40,26 @@
#define CONFIG_SPI_SPL_SIMPLE
#endif
+/*
+ * NAND flash SPL
+ * BOOT CFG 06 only (address cycle based probing, 2KB or 512B page size)
+ */
+#if defined(CONFIG_LTQ_SUPPORT_SPL_NAND_FLASH) && defined(CONFIG_SYS_BOOT_NANDSPL)
+#define CONFIG_SPL
+#define CONFIG_SPL_NAND_SUPPORT
+#define CONFIG_SPL_NAND_DRIVERS
+#define CONFIG_SPL_NAND_SIMPLE
+#define CONFIG_SPL_NAND_ECC
+
+/* use software ECC until driver supports HW ECC */
+#define CONFIG_SPL_NAND_SOFTECC
+#define CONFIG_SYS_NAND_ECCSIZE 256
+#define CONFIG_SYS_NAND_ECCBYTES 3
+#define CONFIG_SYS_NAND_ECCPOS {40, 41, 42, 43, 44, 45, 46, 47, \
+ 48, 49, 50, 51, 52, 53, 54, 55, \
+ 56, 57, 58, 59, 60, 61, 62, 63}
+#endif
+
#if defined(CONFIG_LTQ_SUPPORT_SPL_NOR_FLASH) && defined(CONFIG_SYS_BOOT_NORSPL)
#define CONFIG_SPL
#endif
@@ -148,6 +168,21 @@
#define CONFIG_ENV_LOAD_UBOOT_SF
#endif
+#if defined(CONFIG_LTQ_SUPPORT_NAND_FLASH)
+#define CONFIG_ENV_WRITE_UBOOT_NAND \
+ "write-uboot-nand=" \
+ "nand erase 0 $filesize && " \
+ "nand write $fileaddr 0 $filesize\0"
+
+#define CONFIG_ENV_LOAD_UBOOT_NAND \
+ "load-uboot-nandspl=tftpboot u-boot.ltq.nandspl\0" \
+ "load-uboot-nandspl-lzo=tftpboot u-boot.ltq.lzo.nandspl\0" \
+ "load-uboot-nandspl-lzma=tftpboot u-boot.ltq.lzma.nandspl\0"
+#else
+#define CONFIG_ENV_WRITE_UBOOT_NAND
+#define CONFIG_ENV_LOAD_UBOOT_NAND
+#endif
+
#define CONFIG_ENV_LANTIQ_DEFAULTS \
CONFIG_ENV_CONSOLEDEV \
CONFIG_ENV_ADDCONSOLE \
@@ -159,6 +194,8 @@
CONFIG_ENV_LOAD_UBOOT_NOR \
CONFIG_ENV_SF_PROBE \
CONFIG_ENV_WRITE_UBOOT_SF \
- CONFIG_ENV_LOAD_UBOOT_SF
+ CONFIG_ENV_LOAD_UBOOT_SF \
+ CONFIG_ENV_WRITE_UBOOT_NAND \
+ CONFIG_ENV_LOAD_UBOOT_NAND
#endif /* __LANTIQ_CONFIG_H__ */