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>

2 files changed, 116 insertions, 1 deletions

diff --git a/board/technexion/pico-imx6ul/Makefile b/board/technexion/pico-imx6ul/Makefile
index 8fdb7875ac..b7493df01c 100644
--- 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
index 0000000000..78c731fe7c
--- /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