[PATCH RFC u-boot-mvebu 50/59] arm: mvebu: Add support for generating NAND kwbimage

["Pali Rohár" <pali@kernel.org>]

Add a new Kconfig option CONFIG_MVEBU_SPL_BOOT_DEVICE_NAND which instruct
make to generate kwbimage with NAND header. This image is used for booting
from NAND flash (either SPI or parallel).

Support is very simple, SPL after finishes DDR training returns back to the
BootROM (via CONFIG_SPL_BOOTROM_SUPPORT option) and BootROM then loads and
executes U-Boot proper.

To generate correct kwbimage NAND header, it is required to set following
Kconfig options:

CONFIG_SYS_NAND_PAGE_SIZE
CONFIG_SYS_NAND_BLOCK_SIZE
CONFIG_MVEBU_SPL_NAND_BADBLK_LOCATION

They are used only by make / mkimage when generating final kwbimage.

CONFIG_MVEBU_SPL_NAND_BADBLK_LOCATION is a new mvebu specific Kconfig
option which is set into kwbimage NAND_BADBLK_LOCATION header field.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
 arch/arm/mach-mvebu/Kconfig         | 13 +++++++++++++
 arch/arm/mach-mvebu/Makefile        | 10 ++++++++++
 arch/arm/mach-mvebu/kwbimage.cfg.in |  5 +++++
 drivers/mtd/nand/raw/Kconfig        |  4 +++-
 4 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 2863babefbe3..5e9480aed291 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -321,6 +321,11 @@ config MVEBU_SPL_BOOT_DEVICE_SPI
 	imply SPL_SPI
 	select SPL_BOOTROM_SUPPORT
 
+config MVEBU_SPL_BOOT_DEVICE_NAND
+	bool "NAND flash (SPI or parallel)"
+	select MTD_RAW_NAND
+	select SPL_BOOTROM_SUPPORT
+
 config MVEBU_SPL_BOOT_DEVICE_MMC
 	bool "SDIO/MMC card"
 	imply ENV_IS_IN_MMC
@@ -346,6 +351,14 @@ config MVEBU_SPL_BOOT_DEVICE_UART
 
 endchoice
 
+config MVEBU_SPL_NAND_BADBLK_LOCATION
+	hex "NAND Bad block indicator location"
+	depends on MVEBU_SPL_BOOT_DEVICE_NAND
+	range 0x0 0x1
+	help
+	  Value 0x0 = SLC flash = BBI at page 0 or page 1
+	  Value 0x1 = MLC flash = BBI at last page in the block
+
 config MVEBU_EFUSE
 	bool "Enable eFuse support"
 	depends on HAVE_MVEBU_EFUSE
diff --git a/arch/arm/mach-mvebu/Makefile b/arch/arm/mach-mvebu/Makefile
index a23511b113bb..4b7b9ff8b2f2 100644
--- a/arch/arm/mach-mvebu/Makefile
+++ b/arch/arm/mach-mvebu/Makefile
@@ -50,6 +50,9 @@ KWB_REPLACE += BOOT_FROM
 ifneq ($(CONFIG_MVEBU_SPL_BOOT_DEVICE_SPI),)
 	KWB_CFG_BOOT_FROM=spi
 endif
+ifneq ($(CONFIG_MVEBU_SPL_BOOT_DEVICE_NAND),)
+	KWB_CFG_BOOT_FROM=nand
+endif
 ifneq ($(CONFIG_MVEBU_SPL_BOOT_DEVICE_MMC),)
 	KWB_CFG_BOOT_FROM=sdio
 endif
@@ -60,6 +63,13 @@ ifneq ($(CONFIG_MVEBU_SPL_BOOT_DEVICE_UART),)
 	KWB_CFG_BOOT_FROM=uart
 endif
 
+ifneq ($(CONFIG_MVEBU_SPL_BOOT_DEVICE_NAND),)
+KWB_REPLACE += NAND_PAGE_SIZE NAND_BLKSZ NAND_BADBLK_LOCATION
+KWB_CFG_NAND_PAGE_SIZE = $(CONFIG_SYS_NAND_PAGE_SIZE)
+KWB_CFG_NAND_BLKSZ = $(CONFIG_SYS_NAND_BLOCK_SIZE)
+KWB_CFG_NAND_BADBLK_LOCATION = $(CONFIG_MVEBU_SPL_NAND_BADBLK_LOCATION)
+endif
+
 ifneq ($(CONFIG_SECURED_MODE_IMAGE),)
 KWB_REPLACE += CSK_INDEX
 KWB_CFG_CSK_INDEX = $(CONFIG_SECURED_MODE_CSK_INDEX)
diff --git a/arch/arm/mach-mvebu/kwbimage.cfg.in b/arch/arm/mach-mvebu/kwbimage.cfg.in
index ccb09975817e..90cf00c5b984 100644
--- a/arch/arm/mach-mvebu/kwbimage.cfg.in
+++ b/arch/arm/mach-mvebu/kwbimage.cfg.in
@@ -11,6 +11,11 @@ VERSION		1
 # Boot Media configurations
 #@BOOT_FROM
 
+# NAND configuration
+#@NAND_PAGE_SIZE
+#@NAND_BLKSZ
+#@NAND_BADBLK_LOCATION
+
 # Enable BootROM output via DEBUG flag on SoCs which require it
 #@DEBUG
 
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 8aaba8b1a2cf..8aaf135ab45d 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -550,7 +550,8 @@ comment "Generic NAND options"
 
 config SYS_NAND_BLOCK_SIZE
 	hex "NAND chip eraseblock size"
-	depends on ARCH_SUNXI || SPL_NAND_SUPPORT || TPL_NAND_SUPPORT
+	depends on ARCH_SUNXI || SPL_NAND_SUPPORT || TPL_NAND_SUPPORT || \
+		MVEBU_SPL_BOOT_DEVICE_NAND
 	depends on !NAND_MXS && !NAND_DENALI_DT && !NAND_LPC32XX_MLC && \
 		!NAND_FSL_IFC && !NAND_MT7621
 	help
@@ -576,6 +577,7 @@ config SYS_NAND_PAGE_SIZE
 	hex "NAND chip page size"
 	depends on ARCH_SUNXI || NAND_OMAP_GPMC || NAND_LPC32XX_SLC || \
 		SPL_NAND_SIMPLE || (NAND_MXC && SPL_NAND_SUPPORT) || \
+		MVEBU_SPL_BOOT_DEVICE_NAND || \
 		(NAND_ATMEL && SPL_NAND_SUPPORT) || SPL_GENERATE_ATMEL_PMECC_HEADER
 	depends on !NAND_MXS && !NAND_DENALI_DT && !NAND_LPC32XX_MLC && !NAND_MT7621
 	help
-- 
2.20.1