[PATCH v3] arm: boards: Add support for MYIR MYD-AM335X Development Board
Alexander Shiyan
eagle.alexander923 at gmail.com
Tue Apr 26 00:04:40 PDT 2022
The MYD-AM335X Development Board designed by MYIR is a high-performance
ARM Evaluation Module (EVM) using the MYC-AM335X CPU module as the core
controller board. It is based on up to 1GHz Texas Instruments (TI)
Sitara AM335x family of ARM Cortex-A8 Microprocessors (MPUs) that deliver
high DMIPs at a low cost while also delivering optional 3D graphics
acceleration and key peripherals.
Signed-off-by: Alexander Shiyan <eagle.alexander923 at gmail.com>
---
arch/arm/boards/Makefile | 1 +
arch/arm/boards/myirtech-x335x/Makefile | 3 +
arch/arm/boards/myirtech-x335x/board.c | 44 +++++++
.../defaultenv-myirtech-x335x/boot/nand | 4 +
.../defaultenv-myirtech-x335x/nv/boot.default | 1 +
arch/arm/boards/myirtech-x335x/lowlevel.c | 115 ++++++++++++++++++
arch/arm/configs/am335x_mlo_defconfig | 1 +
arch/arm/configs/omap_defconfig | 3 +-
arch/arm/dts/Makefile | 1 +
arch/arm/dts/am335x-myirtech-myd.dts | 47 +++++++
arch/arm/mach-omap/Kconfig | 6 +
.../arm/mach-omap/include/mach/am33xx-clock.h | 1 +
.../mach-omap/include/mach/am33xx-silicon.h | 2 +
images/Makefile.am33xx | 8 ++
14 files changed, 236 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/boards/myirtech-x335x/Makefile
create mode 100644 arch/arm/boards/myirtech-x335x/board.c
create mode 100644 arch/arm/boards/myirtech-x335x/defaultenv-myirtech-x335x/boot/nand
create mode 100644 arch/arm/boards/myirtech-x335x/defaultenv-myirtech-x335x/nv/boot.default
create mode 100644 arch/arm/boards/myirtech-x335x/lowlevel.c
create mode 100644 arch/arm/dts/am335x-myirtech-myd.dts
diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
index 75e15cbda4..d303999614 100644
--- a/arch/arm/boards/Makefile
+++ b/arch/arm/boards/Makefile
@@ -77,6 +77,7 @@ obj-$(CONFIG_MACH_MB7707) += module-mb7707/
obj-$(CONFIG_MACH_MIOA701) += mioa701/
obj-$(CONFIG_MACH_MX23EVK) += freescale-mx23-evk/
obj-$(CONFIG_MACH_MX28EVK) += freescale-mx28-evk/
+obj-$(CONFIG_MACH_MYIRTECH_X335X) += myirtech-x335x/
obj-$(CONFIG_MACH_NESO) += guf-neso/
obj-$(CONFIG_MACH_NETGEAR_RN104) += netgear-rn104/
obj-$(CONFIG_MACH_NETGEAR_RN2120) += netgear-rn2120/
diff --git a/arch/arm/boards/myirtech-x335x/Makefile b/arch/arm/boards/myirtech-x335x/Makefile
new file mode 100644
index 0000000000..05d9fc7bc3
--- /dev/null
+++ b/arch/arm/boards/myirtech-x335x/Makefile
@@ -0,0 +1,3 @@
+lwl-y += lowlevel.o
+obj-y += board.o
+bbenv-$(CONFIG_DEFAULT_ENVIRONMENT) += defaultenv-myirtech-x335x
diff --git a/arch/arm/boards/myirtech-x335x/board.c b/arch/arm/boards/myirtech-x335x/board.c
new file mode 100644
index 0000000000..c6d808284e
--- /dev/null
+++ b/arch/arm/boards/myirtech-x335x/board.c
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* SPDX-FileCopyrightText: Alexander Shiyan <shc_work at mail.ru> */
+
+#include <bootsource.h>
+#include <common.h>
+#include <driver.h>
+#include <envfs.h>
+#include <init.h>
+#include <linux/sizes.h>
+#include <mach/am33xx-generic.h>
+
+static struct omap_barebox_part myir_barebox_part = {
+ .nand_offset = SZ_128K * 4,
+ .nand_size = SZ_1M,
+};
+
+static __init int myir_devices_init(void)
+{
+ if (!of_machine_is_compatible("myir,myc-am335x"))
+ return 0;
+
+ am33xx_register_ethaddr(0, 0);
+ am33xx_register_ethaddr(1, 1);
+
+ switch (bootsource_get()) {
+ case BOOTSOURCE_MMC:
+ omap_set_bootmmc_devname("mmc0");
+ break;
+ case BOOTSOURCE_NAND:
+ omap_set_barebox_part(&myir_barebox_part);
+ break;
+ default:
+ break;
+ }
+
+ if (IS_ENABLED(CONFIG_DEFAULT_ENVIRONMENT))
+ defaultenv_append_directory(defaultenv_myirtech_x335x);
+
+ if (IS_ENABLED(CONFIG_SHELL_NONE))
+ return am33xx_of_register_bootdevice();
+
+ return 0;
+}
+coredevice_initcall(myir_devices_init);
diff --git a/arch/arm/boards/myirtech-x335x/defaultenv-myirtech-x335x/boot/nand b/arch/arm/boards/myirtech-x335x/defaultenv-myirtech-x335x/boot/nand
new file mode 100644
index 0000000000..c000041095
--- /dev/null
+++ b/arch/arm/boards/myirtech-x335x/defaultenv-myirtech-x335x/boot/nand
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+global.bootm.image="/dev/nand0.system.ubi.kernel"
+global.linux.bootargs.dyn.root="ubi.mtd=system ubi.block=0,root root=fe00 ro"
diff --git a/arch/arm/boards/myirtech-x335x/defaultenv-myirtech-x335x/nv/boot.default b/arch/arm/boards/myirtech-x335x/defaultenv-myirtech-x335x/nv/boot.default
new file mode 100644
index 0000000000..026a25cc7e
--- /dev/null
+++ b/arch/arm/boards/myirtech-x335x/defaultenv-myirtech-x335x/nv/boot.default
@@ -0,0 +1 @@
+nand
diff --git a/arch/arm/boards/myirtech-x335x/lowlevel.c b/arch/arm/boards/myirtech-x335x/lowlevel.c
new file mode 100644
index 0000000000..e867a0be7d
--- /dev/null
+++ b/arch/arm/boards/myirtech-x335x/lowlevel.c
@@ -0,0 +1,115 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* SPDX-FileCopyrightText: Alexander Shiyan <shc_work at mail.ru> */
+
+#include <io.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/barebox-arm.h>
+#include <debug_ll.h>
+#include <init.h>
+#include <linux/sizes.h>
+#include <mach/am33xx-clock.h>
+#include <mach/am33xx-generic.h>
+#include <mach/am33xx-mux.h>
+#include <mach/generic.h>
+#include <mach/sdrc.h>
+#include <mach/sys_info.h>
+#include <mach/wdt.h>
+
+#define AM335X_ZCZ_1000 0x1c2f
+
+static const struct am33xx_ddr_data ddr3_data = {
+ .rd_slave_ratio0 = 0x38,
+ .wr_dqs_slave_ratio0 = 0x44,
+ .fifo_we_slave_ratio0 = 0x94,
+ .wr_slave_ratio0 = 0x7d,
+ .use_rank0_delay = 0x01,
+ .dll_lock_diff0 = 0x00,
+};
+
+static const struct am33xx_cmd_control ddr3_cmd_ctrl = {
+ .slave_ratio0 = 0x80,
+ .dll_lock_diff0 = 0x01,
+ .invert_clkout0 = 0x00,
+ .slave_ratio1 = 0x80,
+ .dll_lock_diff1 = 0x01,
+ .invert_clkout1 = 0x00,
+ .slave_ratio2 = 0x80,
+ .dll_lock_diff2 = 0x01,
+ .invert_clkout2 = 0x00,
+};
+
+/* CPU module contains 512MB (2*256MB) DDR3 SDRAM (2*128MB compatible),
+ * so we configure EMIF for 512MB then detect real size of memory.
+ */
+static const struct am33xx_emif_regs ddr3_regs = {
+ .emif_read_latency = 0x00100007,
+ .emif_tim1 = 0x0aaad4db,
+ .emif_tim2 = 0x266b7fda,
+ .emif_tim3 = 0x501f867f,
+ .zq_config = 0x50074be4,
+ .sdram_config = 0x61c05332,
+ .sdram_config2 = 0x00,
+ .sdram_ref_ctrl = 0xc30,
+};
+
+extern char __dtb_z_am335x_myirtech_myd_start[];
+
+ENTRY_FUNCTION(start_am33xx_myirtech_sram, bootinfo, r1, r2)
+{
+ int mpupll;
+ void *fdt;
+
+ am33xx_save_bootinfo((void *)bootinfo);
+
+ arm_cpu_lowlevel_init();
+
+ relocate_to_current_adr();
+ setup_c();
+
+ fdt = __dtb_z_am335x_myirtech_myd_start;
+
+ /* WDT1 is already running when the bootloader gets control
+ * Disable it to avoid "random" resets
+ */
+ __raw_writel(WDT_DISABLE_CODE1, AM33XX_WDT_REG(WSPR));
+ while (__raw_readl(AM33XX_WDT_REG(WWPS)) != 0x0);
+ __raw_writel(WDT_DISABLE_CODE2, AM33XX_WDT_REG(WSPR));
+ while (__raw_readl(AM33XX_WDT_REG(WWPS)) != 0x0);
+
+ mpupll = MPUPLL_M_800;
+ if (am33xx_get_cpu_rev() == AM335X_ES2_1) {
+ u32 deviceid = readl(AM33XX_EFUSE_SMA) & 0x1fff;
+ if (deviceid == AM335X_ZCZ_1000)
+ mpupll = MPUPLL_M_1000;
+ }
+
+ am33xx_pll_init(mpupll, DDRPLL_M_400);
+
+ am335x_sdram_init(0x18b, &ddr3_cmd_ctrl, &ddr3_regs, &ddr3_data);
+
+ if (IS_ENABLED(CONFIG_DEBUG_LL)) {
+ am33xx_uart_soft_reset(IOMEM(AM33XX_UART0_BASE));
+ am33xx_enable_uart0_pin_mux();
+ omap_uart_lowlevel_init(IOMEM(AM33XX_UART0_BASE));
+ putc_ll('>');
+ }
+
+ barebox_arm_entry(AM33XX_DRAM_ADDR_SPACE_START, SZ_256M, fdt);
+}
+
+ENTRY_FUNCTION(start_am33xx_myirtech_sdram, r0, r1, r2)
+{
+ void *fdt;
+ u32 sdram_size;
+
+ fdt = __dtb_z_am335x_myirtech_myd_start;
+
+ fdt += get_runtime_offset();
+
+ /* Detect 256M/512M module variant */
+ __raw_writel(SZ_512M, AM33XX_DRAM_ADDR_SPACE_START + SZ_256M);
+ __raw_writel(SZ_256M, AM33XX_DRAM_ADDR_SPACE_START + 0);
+ sdram_size = __raw_readl(AM33XX_DRAM_ADDR_SPACE_START + SZ_256M);
+
+ barebox_arm_entry(AM33XX_DRAM_ADDR_SPACE_START, sdram_size, fdt);
+}
diff --git a/arch/arm/configs/am335x_mlo_defconfig b/arch/arm/configs/am335x_mlo_defconfig
index 51d238db3e..83bb20e4b5 100644
--- a/arch/arm/configs/am335x_mlo_defconfig
+++ b/arch/arm/configs/am335x_mlo_defconfig
@@ -5,6 +5,7 @@ CONFIG_OMAP_SERIALBOOT=y
CONFIG_OMAP_MULTI_BOARDS=y
CONFIG_MACH_AFI_GF=y
CONFIG_MACH_BEAGLEBONE=y
+CONFIG_MACH_MYIRTECH_X335X=y
CONFIG_MACH_PHYTEC_SOM_AM335X=y
CONFIG_THUMB2_BAREBOX=y
# CONFIG_MEMINFO is not set
diff --git a/arch/arm/configs/omap_defconfig b/arch/arm/configs/omap_defconfig
index 59892cb231..ae4d1a67da 100644
--- a/arch/arm/configs/omap_defconfig
+++ b/arch/arm/configs/omap_defconfig
@@ -6,6 +6,7 @@ CONFIG_OMAP_MULTI_BOARDS=y
CONFIG_MACH_AFI_GF=y
CONFIG_MACH_BEAGLE=y
CONFIG_MACH_BEAGLEBONE=y
+CONFIG_MACH_MYIRTECH_X335X=y
CONFIG_MACH_PHYTEC_SOM_AM335X=y
CONFIG_MACH_VSCOM_BALTOS=y
CONFIG_MACH_WAGO_PFC_AM35XX=y
@@ -46,6 +47,7 @@ CONFIG_CMD_GO=y
CONFIG_CMD_LOADB=y
CONFIG_CMD_RESET=y
CONFIG_CMD_UIMAGE=y
+CONFIG_CMD_BOOTCHOOSER=y
CONFIG_CMD_PARTITION=y
CONFIG_CMD_UBIFORMAT=y
CONFIG_CMD_EXPORT=y
@@ -93,7 +95,6 @@ CONFIG_CMD_OF_FIXUP_STATUS=y
CONFIG_CMD_OFTREE=y
CONFIG_CMD_TIME=y
CONFIG_CMD_STATE=y
-CONFIG_CMD_BOOTCHOOSER=y
CONFIG_NET=y
CONFIG_NET_NFS=y
CONFIG_NET_NETCONSOLE=y
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 925ac12aa5..619354fcb6 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -40,6 +40,7 @@ lwl-$(CONFIG_MACH_MARVELL_ARMADA_XP_GP) += armada-xp-gp-bb.dtb.o
lwl-$(CONFIG_MACH_MARVELL_ARMADA_XP_DB) += armada-xp-db-bb.dtb.o
lwl-$(CONFIG_MACH_MB7707) += module-mb7707.dtb.o
lwl-$(CONFIG_MACH_MX28EVK) += imx28-evk.dtb.o
+lwl-$(CONFIG_MACH_MYIRTECH_X335X) += am335x-myirtech-myd.dtb.o
lwl-$(CONFIG_MACH_NETGEAR_RN104) += armada-370-rn104-bb.dtb.o
lwl-$(CONFIG_MACH_NETGEAR_RN2120) += armada-xp-rn2120-bb.dtb.o
lwl-$(CONFIG_MACH_NITROGEN6) += imx6q-nitrogen6x.dtb.o imx6dl-nitrogen6x.dtb.o imx6qp-nitrogen6_max.dtb.o
diff --git a/arch/arm/dts/am335x-myirtech-myd.dts b/arch/arm/dts/am335x-myirtech-myd.dts
new file mode 100644
index 0000000000..178a22d266
--- /dev/null
+++ b/arch/arm/dts/am335x-myirtech-myd.dts
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* SPDX-FileCopyrightText: Alexander Shiyan, <shc_work at mail.ru> */
+
+/dts-v1/;
+
+#include <arm/am335x-myirtech-myd.dts>
+
+/ {
+ chosen {
+ environment {
+ compatible = "barebox,environment";
+ device-path = &nand0, "partname:env";
+ };
+ };
+
+};
+
+&nand0 {
+ /delete-node/ partition at 0;
+ /delete-node/ partition at 20000;
+
+ nand_parts: partitions {
+ compatible = "fixed-partitions";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition at 0 {
+ label = "MLO";
+ reg = <0x00000 0x20000>;
+ };
+
+ partition at 80000 {
+ label = "boot";
+ reg = <0x80000 0x100000>;
+ };
+
+ partition at 180000 {
+ label = "env";
+ reg = <0x180000 0x40000>;
+ };
+
+ partition at 1c0000 {
+ label = "system";
+ reg = <0x1c0000 0>;
+ };
+ };
+};
diff --git a/arch/arm/mach-omap/Kconfig b/arch/arm/mach-omap/Kconfig
index 220b635167..f0e035e31e 100644
--- a/arch/arm/mach-omap/Kconfig
+++ b/arch/arm/mach-omap/Kconfig
@@ -168,6 +168,12 @@ config MACH_BEAGLEBONE
help
Say Y here if you are using Beagle Bone
+config MACH_MYIRTECH_X335X
+ bool "MYIR Tech Limited SOMs"
+ select ARCH_AM33XX
+ help
+ Say Y here if you are using a TI AM335X based MYIR SOM
+
config MACH_PHYTEC_SOM_AM335X
bool "Phytec AM335X SOMs"
select ARCH_AM33XX
diff --git a/arch/arm/mach-omap/include/mach/am33xx-clock.h b/arch/arm/mach-omap/include/mach/am33xx-clock.h
index 3c2143d600..b0293db990 100644
--- a/arch/arm/mach-omap/include/mach/am33xx-clock.h
+++ b/arch/arm/mach-omap/include/mach/am33xx-clock.h
@@ -25,6 +25,7 @@
#define MPUPLL_M_600 600 /* 125 * n */
#define MPUPLL_M_720 720 /* 125 * n */
#define MPUPLL_M_800 800
+#define MPUPLL_M_1000 1000
#define MPUPLL_M2 1
diff --git a/arch/arm/mach-omap/include/mach/am33xx-silicon.h b/arch/arm/mach-omap/include/mach/am33xx-silicon.h
index 0729369255..0467dac03b 100644
--- a/arch/arm/mach-omap/include/mach/am33xx-silicon.h
+++ b/arch/arm/mach-omap/include/mach/am33xx-silicon.h
@@ -201,6 +201,8 @@
#define AM33XX_MAC_ID1_HI (AM33XX_CTRL_BASE + 0x63c)
#define AM33XX_MAC_MII_SEL (AM33XX_CTRL_BASE + 0x650)
+#define AM33XX_EFUSE_SMA (AM33XX_CTRL_BASE + 0x7fc)
+
struct am33xx_cmd_control {
u32 slave_ratio0;
u32 dll_lock_diff0;
diff --git a/images/Makefile.am33xx b/images/Makefile.am33xx
index add676117c..a63def771e 100644
--- a/images/Makefile.am33xx
+++ b/images/Makefile.am33xx
@@ -26,6 +26,14 @@ FILE_barebox-am33xx-afi-gf-mlo.spi.img = start_am33xx_afi_gf_sram.pblb.mlospi
am33xx-mlo-$(CONFIG_MACH_AFI_GF) += barebox-am33xx-afi-gf-mlo.img
am33xx-mlospi-$(CONFIG_MACH_AFI_GF) += barebox-am33xx-afi-gf-mlo.spi.img
+pblb-$(CONFIG_MACH_MYIRTECH_X335X) += start_am33xx_myirtech_sdram
+FILE_barebox-am33xx-myirtech.img = start_am33xx_myirtech_sdram.pblb
+am33xx-barebox-$(CONFIG_MACH_MYIRTECH_X335X) += barebox-am33xx-myirtech.img
+
+pblb-$(CONFIG_MACH_MYIRTECH_X335X) += start_am33xx_myirtech_sram
+FILE_barebox-am33xx-myirtech-mlo.img = start_am33xx_myirtech_sram.pblb.mlo
+am33xx-mlo-$(CONFIG_MACH_MYIRTECH_X335X) += barebox-am33xx-myirtech-mlo.img
+
pblb-$(CONFIG_MACH_PHYTEC_SOM_AM335X) += start_am33xx_phytec_phycore_nand_sdram
FILE_barebox-am33xx-phytec-phycore.img = start_am33xx_phytec_phycore_nand_sdram.pblb
am33xx-barebox-$(CONFIG_MACH_PHYTEC_SOM_AM335X) += barebox-am33xx-phytec-phycore.img
--
2.32.0
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