[U-Boot] [PATCH v5] arm: omap3: Add SPL support to cm_t35

Stefan Roese
2013-12-04T12:54:18Z

Add SPL U-Boot support to replace x-loader on the Compulab cm_t35
board. Currently only the 256MiB SDRAM board versions are supported.

Tested by booting via MMC and NAND.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Tom Rini <trini@ti.com>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Nikita Kiryanov <nikita@compulab.co.il>
---
v5:
- Added CONFIG_NAND_OMAP_ECCSCHEME to select HW ECC by default
- Tested with latest mainline U-Boot 2014.01-rc1,
needs fix for 8bit NAND device from Pekon Gupta

v4:
- Rebased and retested on current mainline version

v3:
- Some instability of this SDRAM setup has been detected while running
Linux. Comparison with the x-loader setup showed that mcfg is configured
slightly differently here. CM_T35 needs RAS-width of 14 instead of
13. So use the define MICRON_V_MCFG_200 which implements this 14
as RAS width.

v2:
- Change CONFIG_SYS_TEXT_BASE back to 0x80008000 for x-loader
compatibility
- Change CONFIG_SPL_BSS_START_ADDR to 0x80100000 to not overlap
with TEXT_BASE now

board/compulab/cm_t35/cm_t35.c | 18 +++++++++++-
include/configs/cm_t35.h | 65 ++++++++++++++++++++++++++++++++++++++++--
2 files changed, 80 insertions(+), 3 deletions(-)

diff --git a/board/compulab/cm_t35/cm_t35.c b/board/compulab/cm_t35/cm_t35.c
index bc8e0ca..00bcf41 100644
--- a/board/compulab/cm_t35/cm_t35.c
+++ b/board/compulab/cm_t35/cm_t35.c
@@ -105,6 +105,22 @@ static inline int splash_load_from_nand(void)
}
#endif /* CONFIG_CMD_NAND */

+#ifdef CONFIG_SPL_BUILD
+/*
+ * Routine: get_board_mem_timings
+ * Description: If we use SPL then there is no x-loader nor config header
+ * so we have to setup the DDR timings ourself on both banks.
+ */
+void get_board_mem_timings(struct board_sdrc_timings *timings)
+{
+ timings->mr = MICRON_V_MR_165;
+ timings->mcfg = MICRON_V_MCFG_200(256 << 20); /* raswidth 14 needed */
+ timings->ctrla = MICRON_V_ACTIMA_165;
+ timings->ctrlb = MICRON_V_ACTIMB_165;
+ timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
+}
+#endif
+
int splash_screen_prepare(void)
{
char *env_splashimage_value;
@@ -440,7 +456,7 @@ void set_muxconf_regs(void)
cm_t3730_set_muxconf();
}

-#ifdef CONFIG_GENERIC_MMC
+#if defined(CONFIG_GENERIC_MMC) && !defined(CONFIG_SPL_BUILD)
int board_mmc_getcd(struct mmc *mmc)
{
u8 val;
diff --git a/include/configs/cm_t35.h b/include/configs/cm_t35.h
index f4ecd0d..2e865c0 100644
--- a/include/configs/cm_t35.h
+++ b/include/configs/cm_t35.h
@@ -27,8 +27,6 @@
#define CONFIG_CM_T3X /* working with CM-T35 and CM-T3730 */
#define CONFIG_OMAP_COMMON

-#define CONFIG_SYS_TEXT_BASE 0x80008000
-
#define CONFIG_SDRC /* The chip has SDRC controller */

#include <asm/arch/cpu.h> /* get chip and board defs */
@@ -329,4 +327,67 @@

#define CONFIG_OMAP3_SPI

+/* Defines for SPL */
+#define CONFIG_SPL
+#define CONFIG_SPL_FRAMEWORK
+#define CONFIG_SPL_NAND_SIMPLE
+
+#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR 0x300 /* address 0x60000 */
+#define CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS 0x200 /* 256 KB */
+#define CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 1
+#define CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME "u-boot.img"
+
+#define CONFIG_SPL_BOARD_INIT
+#define CONFIG_SPL_LIBCOMMON_SUPPORT
+#define CONFIG_SPL_LIBDISK_SUPPORT
+#define CONFIG_SPL_I2C_SUPPORT
+#define CONFIG_SPL_LIBGENERIC_SUPPORT
+#define CONFIG_SPL_MMC_SUPPORT
+#define CONFIG_SPL_FAT_SUPPORT
+#define CONFIG_SPL_SERIAL_SUPPORT
+#define CONFIG_SPL_NAND_SUPPORT
+#define CONFIG_SPL_NAND_BASE
+#define CONFIG_SPL_NAND_DRIVERS
+#define CONFIG_SPL_NAND_ECC
+#define CONFIG_SPL_GPIO_SUPPORT
+#define CONFIG_SPL_POWER_SUPPORT
+#define CONFIG_SPL_OMAP3_ID_NAND
+#define CONFIG_SPL_LDSCRIPT "$(CPUDIR)/omap-common/u-boot-spl.lds"
+
+/* NAND boot config */
+#define CONFIG_SYS_NAND_5_ADDR_CYCLE
+#define CONFIG_SYS_NAND_PAGE_COUNT 64
+#define CONFIG_SYS_NAND_PAGE_SIZE 2048
+#define CONFIG_SYS_NAND_OOBSIZE 64
+#define CONFIG_SYS_NAND_BLOCK_SIZE (128 * 1024)
+#define CONFIG_SYS_NAND_BAD_BLOCK_POS NAND_LARGE_BADBLOCK_POS
+/*
+ * Use the ECC/OOB layout from omap_gpmc.h that matches your chip:
+ * SP vs LP, 8bit vs 16bit: GPMC_NAND_HW_ECC_LAYOUT
+ */
+#define CONFIG_SYS_NAND_ECCPOS { 1, 2, 3, 4, 5, 6, 7, 8, 9, \
+ 10, 11, 12 }
+#define CONFIG_SYS_NAND_ECCSIZE 512
+#define CONFIG_SYS_NAND_ECCBYTES 3
+#define CONFIG_NAND_OMAP_ECCSCHEME OMAP_ECC_HAM1_CODE_HW
+
+#define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x80000
+
+#define CONFIG_SPL_TEXT_BASE 0x40200800
+#define CONFIG_SPL_MAX_SIZE (54 * 1024) /* 8 KB for stack */
+#define CONFIG_SPL_STACK LOW_LEVEL_SRAM_STACK
+
+/*
+ * Use 0x80008000 as TEXT_BASE here for compatibility reasons with the
+ * older x-loader implementations. And move the BSS area so that it
+ * doesn't overlap with TEXT_BASE.
+ */
+#define CONFIG_SYS_TEXT_BASE 0x80008000
+#define CONFIG_SPL_BSS_START_ADDR 0x80100000
+#define CONFIG_SPL_BSS_MAX_SIZE 0x80000 /* 512 KB */
+
+#define CONFIG_SYS_SPL_MALLOC_START 0x80208000
+#define CONFIG_SYS_SPL_MALLOC_SIZE 0x100000
+
#endif /* __CONFIG_H */
--
1.8.4.4