pico-imx6ul: Convert to SPL

There are two versions of imx6ul pico SOMs: one with 256MB and another
one with 512MB of RAM.

Convert to SPL so that both versions can be supported. This patch
doesn't rework the clock initialization to avoid changing the behavior
in this same patch, so it will be cleaned up in future.

Currently only the 256MB is tested/supported.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Fabio Berton <fabio.berton@ossystems.com.br>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

diff --git a/arch/arm/mach-imx/mx6/Kconfig b/arch/arm/mach-imx/mx6/Kconfig
index a2799c436ef896b4b440929ec9a88cb06d6a3c7b..06c25bae3629620059e8a595a7bafafa574c120d 100644 (file)
--- a/arch/arm/mach-imx/mx6/Kconfig
+++ b/arch/arm/mach-imx/mx6/Kconfig
@@ -402,6 +402,7 @@ config TARGET_OT1200
 config TARGET_PICO_IMX6UL
        bool "PICO-IMX6UL-EMMC"
        select MX6UL
+       select SUPPORT_SPL
 
 config TARGET_LITEBOARD
        bool "Grinn liteBoard (i.MX6UL)"

diff --git a/board/technexion/pico-imx6ul/Makefile b/board/technexion/pico-imx6ul/Makefile
index 8fdb7875acdf89240c6bf6bb15b512f2096adf56..b7493df01cb1ab39673b88fa8ff44df98abd73fb 100644 (file)
--- a/board/technexion/pico-imx6ul/Makefile
+++ b/board/technexion/pico-imx6ul/Makefile
@@ -2,4 +2,4 @@
 # (C) Copyright 2015 Technexion Ltd.
 # (C) Copyright 2015 Freescale Semiconductor, Inc.
 
-obj-y  := pico-imx6ul.o
+obj-y  := pico-imx6ul.o spl.o

diff --git a/board/technexion/pico-imx6ul/spl.c b/board/technexion/pico-imx6ul/spl.c
new file mode 100644 (file)
index 0000000..78c731f
--- /dev/null
+++ b/board/technexion/pico-imx6ul/spl.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <asm/arch/clock.h>
+#include <asm/arch/iomux.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/crm_regs.h>
+#include <asm/arch/mx6ul_pins.h>
+#include <asm/arch/mx6-pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/gpio.h>
+#include <asm/mach-imx/iomux-v3.h>
+#include <asm/mach-imx/boot_mode.h>
+#include <linux/libfdt.h>
+#include <spl.h>
+
+#if defined(CONFIG_SPL_BUILD)
+#include <asm/arch/mx6-ddr.h>
+
+static struct mx6ul_iomux_grp_regs mx6_grp_ioregs = {
+       .grp_addds = 0x00000030,
+       .grp_ddrmode_ctl = 0x00020000,
+       .grp_b0ds = 0x00000030,
+       .grp_ctlds = 0x00000030,
+       .grp_b1ds = 0x00000030,
+       .grp_ddrpke = 0x00000000,
+       .grp_ddrmode = 0x00020000,
+       .grp_ddr_type = 0x00080000,
+};
+
+static struct mx6ul_iomux_ddr_regs mx6_ddr_ioregs = {
+       .dram_dqm0 = 0x00000030,
+       .dram_dqm1 = 0x00000030,
+       .dram_ras = 0x00000030,
+       .dram_cas = 0x00000030,
+       .dram_odt0 = 0x00000030,
+       .dram_odt1 = 0x00000030,
+       .dram_sdba2 = 0x00000000,
+       .dram_sdclk_0 = 0x00000030,
+       .dram_sdqs0 = 0x00000030,
+       .dram_sdqs1 = 0x00000030,
+       .dram_reset = 0x00000030,
+};
+
+static struct mx6_mmdc_calibration mx6_mmcd_calib = {
+       .p0_mpwldectrl0 = 0x00000000,
+       .p0_mpdgctrl0 = 0x01380134,
+       .p0_mprddlctl = 0x40404244,
+       .p0_mpwrdlctl = 0x40405050,
+};
+
+static struct mx6_ddr_sysinfo ddr_sysinfo = {
+       .dsize          = 0,
+       .cs1_mirror     = 0,
+       .cs_density     = 32,
+       .ncs            = 1,
+       .bi_on          = 1,
+       .rtt_nom        = 1,
+       .rtt_wr         = 0,
+       .ralat          = 5,
+       .walat          = 0,
+       .mif3_mode      = 3,
+       .rst_to_cke     = 0x23,
+       .sde_to_rst     = 0x10,
+       .refsel = 1,
+       .refr = 3,
+};
+
+static struct mx6_ddr3_cfg mem_ddr = {
+       .mem_speed = 1333,
+       .density = 2,
+       .width = 16,
+       .banks = 8,
+       .rowaddr = 14,
+       .coladdr = 10,
+       .pagesz = 2,
+       .trcd = 1350,
+       .trcmin = 4950,
+       .trasmin = 3600,
+};
+
+static void ccgr_init(void)
+{
+       struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+       writel(0xFFFFFFFF, &ccm->CCGR0);
+       writel(0xFFFFFFFF, &ccm->CCGR1);
+       writel(0xFFFFFFFF, &ccm->CCGR2);
+       writel(0xFFFFFFFF, &ccm->CCGR3);
+       writel(0xFFFFFFFF, &ccm->CCGR4);
+       writel(0xFFFFFFFF, &ccm->CCGR5);
+       writel(0xFFFFFFFF, &ccm->CCGR6);
+}
+
+static void spl_dram_init(void)
+{
+       mx6ul_dram_iocfg(mem_ddr.width, &mx6_ddr_ioregs, &mx6_grp_ioregs);
+       mx6_dram_cfg(&ddr_sysinfo, &mx6_mmcd_calib, &mem_ddr);
+}
+
+void board_init_f(ulong dummy)
+{
+       ccgr_init();
+       arch_cpu_init();
+       board_early_init_f();
+       timer_init();
+       preloader_console_init();
+       spl_dram_init();
+       memset(__bss_start, 0, __bss_end - __bss_start);
+       board_init_r(NULL, 0);
+}
+
+void reset_cpu(ulong addr)
+{
+}
+#endif

diff --git a/configs/pico-imx6ul_defconfig b/configs/pico-imx6ul_defconfig
index 3f969a2d6e6691ca49a98524515cdb4245d47746..589e67be96ac078397297be020851c8c17160208 100644 (file)
--- a/configs/pico-imx6ul_defconfig
+++ b/configs/pico-imx6ul_defconfig
@@ -1,12 +1,23 @@
 CONFIG_ARM=y
 CONFIG_ARCH_MX6=y
 CONFIG_SYS_TEXT_BASE=0x87800000
+CONFIG_SPL_GPIO_SUPPORT=y
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_TARGET_PICO_IMX6UL=y
+CONFIG_SPL_MMC_SUPPORT=y
+CONFIG_SPL_SERIAL_SUPPORT=y
+CONFIG_SPL=y
+CONFIG_SPL_LIBDISK_SUPPORT=y
 # CONFIG_CMD_BMODE is not set
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_DISTRO_DEFAULTS=y
-CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/technexion/pico-imx6ul/imximage.cfg"
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/mach-imx/spl_sd.cfg"
 CONFIG_BOOTCOMMAND="run finduuid; run distro_bootcmd"
+CONFIG_SPL_I2C_SUPPORT=y
+CONFIG_SPL_USB_HOST_SUPPORT=y
+CONFIG_SPL_USB_GADGET_SUPPORT=y
+CONFIG_SPL_USB_SDP_SUPPORT=y
 CONFIG_BOOTDELAY=3
 CONFIG_SUPPORT_RAW_INITRD=y
 CONFIG_DEFAULT_FDT_FILE="imx6ul-pico-hobbit.dtb"
@@ -21,6 +32,7 @@ CONFIG_CMD_GPT=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_PART=y
 CONFIG_CMD_USB=y
+CONFIG_CMD_USB_SDP=y
 CONFIG_CMD_USB_MASS_STORAGE=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y

diff --git a/include/configs/pico-imx6ul.h b/include/configs/pico-imx6ul.h
index e8e4c876140ec2f764d801db6a31c667051e88d8..5fdbff93e0a8eb3194569bb03bb3077f41358327 100644 (file)
--- a/include/configs/pico-imx6ul.h
+++ b/include/configs/pico-imx6ul.h
@@ -12,6 +12,7 @@
 #include <linux/sizes.h>
 #include "mx6_common.h"
 #include <asm/mach-imx/gpio.h>
+#include "imx6_spl.h"
 
 /* Network support */