[U-Boot] [RFC] Attempt to Add SPL Support to imx6q_logic

21 Oct 2017

The Logic PD i.MX6 dev kit is capable of SPL.  This patch follows
a similar method as the mx6sabresd
Following instructions I found which show to put the SPL and .img
files on the SD card with dd.
sudo dd if=SPL of=/dev/xxx bs=1K seek=1; sync
sudo dd if=u-boot.img of=/dev/xxx bs=1K seek=69
I would prefer to have the u-boot.img in a standard partition if
possible similar to how the omap3_logic board is done.
Unfortunately with DEBUG enabled in SPL, I only see:
U-Boot SPL 2017.11-rc2-00019-g23d51be-dirty (Oct 21 2017 - 16:14:59)
...
...
spl:board_init_r()
spl_early_init()
Trying to boot from MMC1
I was hoping someone with an i.MX6 might have some insight.
Signed-off-by: Adam Ford aford173@gmail.com

diff --git a/arch/arm/mach-imx/mx6/Kconfig b/arch/arm/mach-imx/mx6/Kconfig
index b82db3a..750be47 100644
--- a/arch/arm/mach-imx/mx6/Kconfig
+++ b/arch/arm/mach-imx/mx6/Kconfig
@@ -189,6 +189,7 @@ config TARGET_MX6LOGICPD
    select DM_PMIC
    select DM_REGULATOR
    select OF_CONTROL
+	select SUPPORT_SPL
config TARGET_MX6QARM2
    bool "mx6qarm2"
diff --git a/board/logicpd/imx6/imx6logic.c b/board/logicpd/imx6/imx6logic.c
index 1f3e378..4742ab8 100644
--- a/board/logicpd/imx6/imx6logic.c
+++ b/board/logicpd/imx6/imx6logic.c
@@ -61,6 +61,7 @@ static iomux_v3_cfg_t const uart3_pads[] = {
    MX6_PAD_EIM_EB3__UART3_RTS_B | MUX_PAD_CTRL(UART_PAD_CTRL),
 };
+#ifndef CONFIG_SPL_BUILD
 static void fixup_enet_clock(void)
 {
    struct iomuxc *iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
@@ -109,6 +110,7 @@ static void fixup_enet_clock(void)
    dm_gpio_set_value(&reset, 1);
    mdelay(50);
 }
+#endif
static void setup_iomux_uart(void)
 {
@@ -159,7 +161,9 @@ int overwrite_console(void)
int board_early_init_f(void)
 {
+#ifndef CONFIG_SPL_BUILD
    fixup_enet_clock();
+#endif
    setup_iomux_uart();
    setup_nand_pins();
    return 0;
@@ -183,3 +187,143 @@ int board_late_init(void)
return 0;
 }
+
+#ifdef CONFIG_SPL_BUILD
+#include <asm/arch/mx6-ddr.h>
+#include <spl.h>
+#include <libfdt.h>
+#include <config.h>
+#include "asm/arch-mx6/mx6q-ddr.h"
+#include "asm/arch-mx6/iomux.h"
+#include "asm/arch-mx6/crm_regs.h"
+
+int spl_start_uboot(void)
+{
+	return 1;
+}
+
+static void ccgr_init(void)
+{
+	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+	writel(0x00C03F3F, &ccm->CCGR0);
+	writel(0x0030FC03, &ccm->CCGR1);
+	writel(0x0FFFC000, &ccm->CCGR2);
+	writel(0x3FF00000, &ccm->CCGR3);
+	writel(0xFFFFF300, &ccm->CCGR4);
+	writel(0x0F0000F3, &ccm->CCGR5);
+	writel(0x00000FFF, &ccm->CCGR6);
+}
+
+static int mx6q_dcd_table[] = {
+
+	MX6_IOM_GRP_DDR_TYPE, 0x000C0000,
+	MX6_IOM_GRP_DDRPKE, 0x00000000,
+	MX6_IOM_DRAM_SDCLK_0, 0x00000030,
+	MX6_IOM_DRAM_SDCLK_1, 0x00000030,
+	MX6_IOM_DRAM_CAS, 0x00000030,
+	MX6_IOM_DRAM_RAS, 0x00000030,
+	MX6_IOM_GRP_ADDDS, 0x00000030,
+	MX6_IOM_DRAM_RESET, 0x00000030,
+	MX6_IOM_DRAM_SDBA2, 0x00000000,
+	MX6_IOM_DRAM_SDODT0, 0x00000030,
+	MX6_IOM_DRAM_SDODT1, 0x00000030,
+	MX6_IOM_GRP_CTLDS, 0x00000030,
+	MX6_IOM_DDRMODE_CTL, 0x00020000,
+	MX6_IOM_DRAM_SDQS0, 0x00000030,
+	MX6_IOM_DRAM_SDQS1, 0x00000030,
+	MX6_IOM_DRAM_SDQS2, 0x00000030,
+	MX6_IOM_DRAM_SDQS3, 0x00000030,
+	MX6_IOM_GRP_DDRMODE, 0x00020000,
+	MX6_IOM_GRP_B0DS, 0x00000030,
+	MX6_IOM_GRP_B1DS, 0x00000030,
+	MX6_IOM_GRP_B2DS, 0x00000030,
+	MX6_IOM_GRP_B3DS, 0x00000030,
+	MX6_IOM_DRAM_DQM0, 0x00000030,
+	MX6_IOM_DRAM_DQM1, 0x00000030,
+	MX6_IOM_DRAM_DQM2, 0x00000030,
+	MX6_IOM_DRAM_DQM3, 0x00000030,
+	MX6_MMDC_P0_MDSCR, 0x00008000,
+	MX6_MMDC_P0_MPZQHWCTRL, 0xA1390003,
+	MX6_MMDC_P0_MPWLDECTRL0, 0x002D003A,
+	MX6_MMDC_P0_MPWLDECTRL1, 0x0038002B,
+	MX6_MMDC_P0_MPDGCTRL0, 0x03340338,
+	MX6_MMDC_P0_MPDGCTRL1, 0x0334032C,
+	MX6_MMDC_P0_MPRDDLCTL, 0x4036383C,
+	MX6_MMDC_P0_MPWRDLCTL, 0x2E384038,
+	MX6_MMDC_P0_MPRDDQBY0DL, 0x33333333,
+	MX6_MMDC_P0_MPRDDQBY1DL, 0x33333333,
+	MX6_MMDC_P0_MPRDDQBY2DL, 0x33333333,
+	MX6_MMDC_P0_MPRDDQBY3DL, 0x33333333,
+	MX6_MMDC_P0_MPMUR0, 0x00000800,
+	MX6_MMDC_P0_MDPDC, 0x00020036,
+	MX6_MMDC_P0_MDOTC, 0x09444040,
+	MX6_MMDC_P0_MDCFG0, 0xB8BE7955,
+	MX6_MMDC_P0_MDCFG1, 0xFF328F64,
+	MX6_MMDC_P0_MDCFG2, 0x01FF00DB,
+	MX6_MMDC_P0_MDMISC, 0x00011740,
+	MX6_MMDC_P0_MDSCR, 0x00008000,
+	MX6_MMDC_P0_MDRWD, 0x000026D2,
+	MX6_MMDC_P0_MDOR, 0x00BE1023,
+	MX6_MMDC_P0_MDASP, 0x00000047,
+	MX6_MMDC_P0_MDCTL, 0x85190000,
+	MX6_MMDC_P0_MDSCR, 0x00888032,
+	MX6_MMDC_P0_MDSCR, 0x00008033,
+	MX6_MMDC_P0_MDSCR, 0x00008031,
+	MX6_MMDC_P0_MDSCR, 0x19408030,
+	MX6_MMDC_P0_MDSCR, 0x04008040,
+	MX6_MMDC_P0_MDREF, 0x00007800,
+	MX6_MMDC_P0_MPODTCTRL, 0x00000007,
+	MX6_MMDC_P0_MDPDC, 0x00025576,
+	MX6_MMDC_P0_MAPSR, 0x00011006,
+	MX6_MMDC_P0_MDSCR, 0x00000000,
+
+	/* enable AXI cache for VDOA/VPU/IPU */
+	MX6_IOMUXC_GPR4, 0xF00000CF,
+	/* set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 */
+	MX6_IOMUXC_GPR6, 0x007F007F,
+	MX6_IOMUXC_GPR7, 0x007F007F,
+};
+
+static void ddr_init(int *table, int size)
+{
+	int i;
+
+	for (i = 0; i < size / 2 ; i++)
+		writel(table[2 * i + 1], table[2 * i]);
+}
+
+static void spl_dram_init(void)
+{
+	if (is_mx6dq())
+		ddr_init(mx6q_dcd_table, ARRAY_SIZE(mx6q_dcd_table));
+}
+
+void board_init_f(ulong dummy)
+{
+	/* DDR initialization */
+	spl_dram_init();
+
+	/* setup AIPS and disable watchdog */
+	arch_cpu_init();
+
+	ccgr_init();
+	gpr_init();
+
+	/* Setup UART and NAND */
+	board_early_init_f();
+
+	/* setup GP timer */
+	timer_init();
+
+	/* UART clocks enabled and gd valid - init serial console */
+	preloader_console_init();
+
+	/* Clear the BSS. */
+	memset(__bss_start, 0, __bss_end - __bss_start);
+
+	/* load/boot image from boot device */
+	board_init_r(NULL, 0);
+}
+#endif
+
diff --git a/configs/imx6q_logic_defconfig b/configs/imx6q_logic_defconfig
index 8018198..88e0de0 100644
--- a/configs/imx6q_logic_defconfig
+++ b/configs/imx6q_logic_defconfig
@@ -1,14 +1,27 @@
 CONFIG_ARM=y
 CONFIG_ARCH_MX6=y
+CONFIG_SPL_GPIO_SUPPORT=y
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_TARGET_MX6LOGICPD=y
+CONFIG_SPL_MMC_SUPPORT=y
+CONFIG_SPL_SERIAL_SUPPORT=y
+CONFIG_SPL_LIBDISK_SUPPORT=y
+CONFIG_SPL_WATCHDOG_SUPPORT=y
+CONFIG_SPL_FAT_SUPPORT=y
 CONFIG_DEFAULT_DEVICE_TREE="imx6q-logicpd"
-CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/logicpd/imx6/mx6q_2x_MT41K512M16HA.cfg,MX6Q"
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/mach-imx/spl_sd.cfg,MX6Q"
 CONFIG_BOOTDELAY=3
 CONFIG_SYS_CONSOLE_IS_IN_ENV=y
 CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE=y
+CONFIG_SPL=y
+CONFIG_SPL_EXT_SUPPORT=y
+CONFIG_SPL_OS_BOOT=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="i.MX6 Logic # "
 CONFIG_CMD_BOOTZ=y
+CONFIG_CMD_SPL=y
+CONFIG_CMD_SPL_WRITE_SIZE=0x20000
 CONFIG_CMD_MEMTEST=y
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_GPIO=y
@@ -28,7 +41,6 @@ CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_CMD_MTDPARTS=y
 CONFIG_ENV_IS_IN_NAND=y
-# CONFIG_BLK is not set
 CONFIG_SYS_I2C_MXC=y
 CONFIG_NAND=y
 CONFIG_NAND_MXS=y
diff --git a/include/configs/imx6_logic.h b/include/configs/imx6_logic.h
index c1e9f5d..6b37397 100644
--- a/include/configs/imx6_logic.h
+++ b/include/configs/imx6_logic.h
@@ -9,12 +9,26 @@
 #ifndef __IMX6LOGIC_CONFIG_H
 #define __IMX6LOGIC_CONFIG_H
+#ifdef CONFIG_SPL
+#include "imx6_spl.h"
+#endif
+
 #define CONFIG_MXC_UART_BASE   UART1_BASE
 #define CONSOLE_DEV            "ttymxc0"
#include <config_distro_defaults.h>
 #include "mx6_common.h"
+/* Falcon Mode */
+#define CONFIG_SPL_FS_LOAD_ARGS_NAME	"args"
+#define CONFIG_SPL_FS_LOAD_KERNEL_NAME	"uImage"
+#define CONFIG_SYS_SPL_ARGS_ADDR       0x18000000
+
+/* Falcon Mode - MMC support: args@1MB kernel@2MB */
+#define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR  0x800   /* 1MB */
+#define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS (CONFIG_CMD_SPL_WRITE_SIZE / 512)
+#define CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR        0x1000  /* 2MB */
+
 /* Size of malloc() pool */
 #define CONFIG_SYS_MALLOC_LEN          (10 * SZ_1M)
-- 
2.7.4


    

Adam Ford

Lukasz Majewski

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