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kumquat-buildroot/board/grinn/liteboard/patches/uboot/0001-ARM-imx6ul-Add-support-for-liteSOM.patch
Marcin Niestroj 4a21ba0b92 board: add support for liteBoard 
Board support package includes:

 * Buildroot defconfig
 * Mainline Linux kernel v4.8 with board support patches
 * Mainline U-Boot v2016.09 with board support patches
 * genimage config to create sdcard image
 * Board readme.txt

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2016-10-05 23:12:40 +02:00

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From 0f6c7b874d2cc1d0ba500190f4c3d16eabb5d711 Mon Sep 17 00:00:00 2001
From: Marcin Niestroj <m.niestroj@grinn-global.com>
Date: Tue, 5 Jul 2016 14:59:28 +0200
Subject: [PATCH 1/2] ARM: imx6ul: Add support for liteSOM
liteSOM is a System On Module (http://grinn-global.com/litesom/). It
can't exists on its own, but will be used as part of other boards.
Hardware specification:
* NXP i.MX6UL processor
* 256M or 512M DDR3 memory
* optional eMMC (uSDHC2)
Here we treat SOM similar to SOC, so we place it inside arch/arm/mach-*
directory and make it possible to reuse initialization code (i.e. DDR,
eMMC init) for all boards that use it.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
---
arch/arm/Kconfig | 2 +
arch/arm/Makefile | 1 +
arch/arm/mach-litesom/Kconfig | 6 +
arch/arm/mach-litesom/Makefile | 6 +
arch/arm/mach-litesom/include/mach/litesom.h | 16 +++
arch/arm/mach-litesom/litesom.c | 200 +++++++++++++++++++++++++++
6 files changed, 231 insertions(+)
create mode 100644 arch/arm/mach-litesom/Kconfig
create mode 100644 arch/arm/mach-litesom/Makefile
create mode 100644 arch/arm/mach-litesom/include/mach/litesom.h
create mode 100644 arch/arm/mach-litesom/litesom.c
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index e63309a..bf5ac39 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -917,6 +917,8 @@ source "arch/arm/mach-keystone/Kconfig"
source "arch/arm/mach-kirkwood/Kconfig"
+source "arch/arm/mach-litesom/Kconfig"
+
source "arch/arm/mach-mvebu/Kconfig"
source "arch/arm/cpu/armv7/mx7/Kconfig"
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 42093c2..3e804d7 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -58,6 +58,7 @@ machine-$(CONFIG_ARCH_HIGHBANK) += highbank
machine-$(CONFIG_ARCH_KEYSTONE) += keystone
# TODO: rename CONFIG_KIRKWOOD -> CONFIG_ARCH_KIRKWOOD
machine-$(CONFIG_KIRKWOOD) += kirkwood
+machine-$(CONFIG_LITESOM) += litesom
machine-$(CONFIG_ARCH_MESON) += meson
machine-$(CONFIG_ARCH_MVEBU) += mvebu
# TODO: rename CONFIG_TEGRA -> CONFIG_ARCH_TEGRA
diff --git a/arch/arm/mach-litesom/Kconfig b/arch/arm/mach-litesom/Kconfig
new file mode 100644
index 0000000..9b7f36d
--- /dev/null
+++ b/arch/arm/mach-litesom/Kconfig
@@ -0,0 +1,6 @@
+config LITESOM
+ bool
+ select MX6UL
+ select DM
+ select DM_THERMAL
+ select SUPPORT_SPL
diff --git a/arch/arm/mach-litesom/Makefile b/arch/arm/mach-litesom/Makefile
new file mode 100644
index 0000000..b15eb64
--- /dev/null
+++ b/arch/arm/mach-litesom/Makefile
@@ -0,0 +1,6 @@
+# (C) Copyright 2016 Grinn
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-y := litesom.o
diff --git a/arch/arm/mach-litesom/include/mach/litesom.h b/arch/arm/mach-litesom/include/mach/litesom.h
new file mode 100644
index 0000000..6833949
--- /dev/null
+++ b/arch/arm/mach-litesom/include/mach/litesom.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2016 Grinn
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __ARCH_ARM_MACH_LITESOM_SOM_H__
+#define __ARCH_ARM_MACH_LITESOM_SOM_H__
+
+int litesom_mmc_init(bd_t *bis);
+
+#ifdef CONFIG_SPL_BUILD
+void litesom_init_f(void);
+#endif
+
+#endif
diff --git a/arch/arm/mach-litesom/litesom.c b/arch/arm/mach-litesom/litesom.c
new file mode 100644
index 0000000..ac2eccf
--- /dev/null
+++ b/arch/arm/mach-litesom/litesom.c
@@ -0,0 +1,200 @@
+/*
+ * Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
+ * Copyright (C) 2016 Grinn
+ *
+ * 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/imx-common/iomux-v3.h>
+#include <asm/imx-common/boot_mode.h>
+#include <asm/io.h>
+#include <common.h>
+#include <fsl_esdhc.h>
+#include <linux/sizes.h>
+#include <mmc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE | \
+ PAD_CTL_PUS_22K_UP | PAD_CTL_SPEED_LOW | \
+ PAD_CTL_DSE_80ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS)
+
+int dram_init(void)
+{
+ gd->ram_size = imx_ddr_size();
+
+ return 0;
+}
+
+static iomux_v3_cfg_t const emmc_pads[] = {
+ MX6_PAD_NAND_RE_B__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NAND_WE_B__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NAND_DATA00__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NAND_DATA01__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NAND_DATA02__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NAND_DATA03__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NAND_DATA04__USDHC2_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NAND_DATA05__USDHC2_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NAND_DATA06__USDHC2_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NAND_DATA07__USDHC2_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+
+ /* RST_B */
+ MX6_PAD_NAND_ALE__GPIO4_IO10 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+#ifdef CONFIG_FSL_ESDHC
+static struct fsl_esdhc_cfg emmc_cfg = {USDHC2_BASE_ADDR, 0, 8};
+
+#define EMMC_PWR_GPIO IMX_GPIO_NR(4, 10)
+
+int litesom_mmc_init(bd_t *bis)
+{
+ int ret;
+
+ /* eMMC */
+ imx_iomux_v3_setup_multiple_pads(emmc_pads, ARRAY_SIZE(emmc_pads));
+ gpio_direction_output(EMMC_PWR_GPIO, 0);
+ udelay(500);
+ gpio_direction_output(EMMC_PWR_GPIO, 1);
+ emmc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+
+ ret = fsl_esdhc_initialize(bis, &emmc_cfg);
+ if (ret) {
+ printf("Warning: failed to initialize mmc dev 1 (eMMC)\n");
+ return ret;
+ }
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_SPL_BUILD
+#include <libfdt.h>
+#include <spl.h>
+#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 = 0x000c0000,
+};
+
+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 = 0x41570155,
+ .p0_mprddlctl = 0x4040474A,
+ .p0_mpwrdlctl = 0x40405550,
+};
+
+struct mx6_ddr_sysinfo ddr_sysinfo = {
+ .dsize = 0,
+ .cs_density = 20,
+ .ncs = 1,
+ .cs1_mirror = 0,
+ .rtt_wr = 2,
+ .rtt_nom = 1, /* RTT_Nom = RZQ/2 */
+ .walat = 0, /* Write additional latency */
+ .ralat = 5, /* Read additional latency */
+ .mif3_mode = 3, /* Command prediction working mode */
+ .bi_on = 1, /* Bank interleaving enabled */
+ .sde_to_rst = 0x10, /* 14 cycles, 200us (JEDEC default) */
+ .rst_to_cke = 0x23, /* 33 cycles, 500us (JEDEC default) */
+ .ddr_type = DDR_TYPE_DDR3,
+ .refsel = 0, /* Refresh cycles at 64KHz */
+ .refr = 1, /* 2 refresh commands per refresh cycle */
+};
+
+static struct mx6_ddr3_cfg mem_ddr = {
+ .mem_speed = 800,
+ .density = 4,
+ .width = 16,
+ .banks = 8,
+ .rowaddr = 15,
+ .coladdr = 10,
+ .pagesz = 2,
+ .trcd = 1375,
+ .trcmin = 4875,
+ .trasmin = 3500,
+};
+
+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);
+ writel(0xFFFFFFFF, &ccm->CCGR7);
+}
+
+static void spl_dram_init(void)
+{
+ unsigned long ram_size;
+
+ mx6ul_dram_iocfg(mem_ddr.width, &mx6_ddr_ioregs, &mx6_grp_ioregs);
+ mx6_dram_cfg(&ddr_sysinfo, &mx6_mmcd_calib, &mem_ddr);
+
+ /*
+ * Get actual RAM size, so we can adjust DDR row size for <512M
+ * memories
+ */
+ ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, SZ_512M);
+ if (ram_size < SZ_512M) {
+ mem_ddr.rowaddr = 14;
+ mx6_dram_cfg(&ddr_sysinfo, &mx6_mmcd_calib, &mem_ddr);
+ }
+}
+
+void litesom_init_f(void)
+{
+ ccgr_init();
+
+ /* setup AIPS and disable watchdog */
+ arch_cpu_init();
+
+#ifdef CONFIG_BOARD_EARLY_INIT_F
+ board_early_init_f();
+#endif
+
+ /* setup GP timer */
+ timer_init();
+
+ /* UART clocks enabled and gd valid - init serial console */
+ preloader_console_init();
+
+ /* DDR initialization */
+ spl_dram_init();
+}
+#endif
--
2.10.0
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