On 05/30/2017 07:25 AM, Alexey Brodkin wrote: > This initial port add support of ARC HS Development Kit board with some > basic features such as SMP and serial port, USB, SD/MMC and Ethernet. > > Note as opposed to other ARC boards we link Linux kernel to > 0x9000_0000 intentionally because cores 1 and 3 configured with DCCM > situated at our more usual link base 0x8000_0000. > > Also there's a prerequisite for this change required to get > .dts compiled, see > http://lists.infradead.org/pipermail/linux-snps-arc/2017-May/002462.html > > Signed-off-by: Eugeniy Paltsev <paltsev at synopsys.com> > Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com> > --- > Documentation/devicetree/bindings/arc/hsdk.txt | 7 ++ > arch/arc/Kconfig | 1 + > arch/arc/Makefile | 1 + > arch/arc/boot/dts/hsdk.dts | 151 +++++++++++++++++++++++++ > arch/arc/configs/hsdk_defconfig | 72 ++++++++++++ > arch/arc/kernel/devtree.c | 2 + > arch/arc/plat-hsdk/Kconfig | 12 ++ > arch/arc/plat-hsdk/Makefile | 9 ++ > arch/arc/plat-hsdk/platform.c | 73 ++++++++++++ > 9 files changed, 328 insertions(+) > create mode 100644 Documentation/devicetree/bindings/arc/hsdk.txt > create mode 100644 arch/arc/boot/dts/hsdk.dts > create mode 100644 arch/arc/configs/hsdk_defconfig > create mode 100644 arch/arc/plat-hsdk/Kconfig > create mode 100644 arch/arc/plat-hsdk/Makefile > create mode 100644 arch/arc/plat-hsdk/platform.c > > diff --git a/Documentation/devicetree/bindings/arc/hsdk.txt b/Documentation/devicetree/bindings/arc/hsdk.txt > new file mode 100644 > index 000000000000..be50654bbf61 > --- /dev/null > +++ b/Documentation/devicetree/bindings/arc/hsdk.txt > @@ -0,0 +1,7 @@ > +Synopsys DesignWare ARC HS Development Kit Device Tree Bindings > +--------------------------------------------------------------------------- > + > +ARC HSDK Board with quad-core ARC HS38x4 in silicon. > + > +Required root node properties: > + - compatible = "snps,hsdk"; > diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig > index a5459698f0ee..92c912819613 100644 > --- a/arch/arc/Kconfig > +++ b/arch/arc/Kconfig > @@ -101,6 +101,7 @@ source "arch/arc/plat-tb10x/Kconfig" > source "arch/arc/plat-axs10x/Kconfig" > #New platform adds here > source "arch/arc/plat-eznps/Kconfig" > +source "arch/arc/plat-hsdk/Kconfig" > > endmenu > > diff --git a/arch/arc/Makefile b/arch/arc/Makefile > index 44ef35d33956..55ca925edf65 100644 > --- a/arch/arc/Makefile > +++ b/arch/arc/Makefile > @@ -111,6 +111,7 @@ core-$(CONFIG_ARC_PLAT_SIM) += arch/arc/plat-sim/ > core-$(CONFIG_ARC_PLAT_TB10X) += arch/arc/plat-tb10x/ > core-$(CONFIG_ARC_PLAT_AXS10X) += arch/arc/plat-axs10x/ > core-$(CONFIG_ARC_PLAT_EZNPS) += arch/arc/plat-eznps/ > +core-$(CONFIG_ARC_PLAT_HSDK) += arch/arc/plat-hsdk/ > > ifdef CONFIG_ARC_PLAT_EZNPS > KBUILD_CPPFLAGS += -I$(srctree)/arch/arc/plat-eznps/include > diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts > new file mode 100644 > index 000000000000..e2d7373bb256 > --- /dev/null > +++ b/arch/arc/boot/dts/hsdk.dts > @@ -0,0 +1,151 @@ > +/* > + * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com) 2017 ? > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + */ > + > +/* > + * Device Tree for ARC HS Development Kit > + */ > +/dts-v1/; > + > +/include/ "skeleton_hs_idu.dtsi" > + > +#include <dt-bindings/net/ti-dp83867.h> > + > +/ { > + model = "snps,hsdk"; > + compatible = "snps,hsdk"; > + > + #address-cells = <1>; > + #size-cells = <1>; > + > + chosen { > + bootargs = "earlycon=uart8250,mmio32,0xf0005000,115200n8 console=ttyS0,115200n8 debug print-fatal-signals=1"; > + }; > + > + cpu { > + compatible = "simple-bus"; > + #address-cells = <1>; > + #size-cells = <1>; > + interrupt-parent = <&core_intc>; > + > + core_clk: core_clk { > + #clock-cells = <0>; > + compatible = "fixed-clock"; > + clock-frequency = <1000000000>; > + }; > + > + core_intc: archs-intc at cpu { > + compatible = "snps,archs-intc"; > + interrupt-controller; > + #interrupt-cells = <1>; > + }; > + > + idu_intc: idu-interrupt-controller { > + compatible = "snps,archs-idu-intc"; > + interrupt-controller; > + #interrupt-cells = <1>; > + }; > + > + arcpct0: pct { > + compatible = "snps,archs-pct"; > + }; > + }; > + > + soc { > + compatible = "simple-bus"; > + #address-cells = <1>; > + #size-cells = <1>; > + interrupt-parent = <&idu_intc>; > + > + ranges = <0x00000000 0xf0000000 0x10000000>; > + > + uart: dw-apb-uart at 0x5000 { > + compatible = "snps,dw-apb-uart"; > + reg = <0x5000 0x100>; > + clock-frequency = <33330000>; > + interrupts = <6>; > + baud = <115200>; > + reg-shift = <2>; > + reg-io-width = <4>; > + }; > + > + gmacclk: gmacclk { > + compatible = "fixed-clock"; > + clock-frequency = <400000000>; > + #clock-cells = <0>; > + }; > + > + mmcclk_ciu: mmcclk_ciu { > + compatible = "fixed-clock"; > + clock-frequency = <100000000>; > + #clock-cells = <0>; > + }; > + > + mmcclk_biu: mmcclk_biu { > + compatible = "fixed-clock"; > + clock-frequency = <400000000>; > + #clock-cells = <0>; > + }; > + > + ethernet at 0x8000 { > + #interrupt-cells = <1>; > + compatible = "snps,dwmac"; > + reg = < 0x8000 0x2000 >; > + interrupts = <10>; > + interrupt-names = "macirq"; > + phy-mode = "rgmii"; > + snps,pbl = <32>; > + clocks = <&gmacclk>; > + clock-names = "stmmaceth"; > + phy-handle = <&phy0>; > + > + mdio0 { > + #address-cells = <1>; > + #size-cells = <0>; > + compatible = "snps,dwmac-mdio"; > + phy0: ethernet-phy at 0 { > + reg = <0>; > + ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>; > + ti,tx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>; > + ti,fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>; > + }; > + }; > + }; > + > + ohci at 0x60000 { > + compatible = "generic-ohci"; > + reg = <0x60000 0x100>; > + interrupts = <15>; > + }; > + > + ehci at 0x60000 { > + compatible = "generic-ehci"; > + reg = <0x40000 0x100>; > + interrupts = <15>; > + }; > + > + mmc at 0xA000 { > + compatible = "altr,socfpga-dw-mshc"; > + reg = <0xA000 0x400>; > + num-slots = <1>; > + fifo-depth = <16>; > + card-detect-delay = <200>; > + clocks = <&mmcclk_biu>, <&mmcclk_ciu>; > + clock-names = "biu", "ciu"; > + interrupts = <12>; > + bus-width = <4>; > + }; > + }; > + > + memory { > + #address-cells = <1>; > + #size-cells = <1>; > + ranges = <0x00000000 0x90000000 0x40000000>; > + device_type = "memory"; > + reg = <0x90000000 0x10000000>; /* 256MiB */ why only 256 ? > + }; > +}; > diff --git a/arch/arc/configs/hsdk_defconfig b/arch/arc/configs/hsdk_defconfig > new file mode 100644 > index 000000000000..1a618817aeb2 > --- /dev/null > +++ b/arch/arc/configs/hsdk_defconfig > @@ -0,0 +1,72 @@ > +CONFIG_DEFAULT_HOSTNAME="ARCLinux" > +CONFIG_SYSVIPC=y > +# CONFIG_CROSS_MEMORY_ATTACH is not set > +CONFIG_NO_HZ_IDLE=y > +CONFIG_HIGH_RES_TIMERS=y > +CONFIG_IKCONFIG=y > +CONFIG_IKCONFIG_PROC=y > +CONFIG_NAMESPACES=y > +# CONFIG_UTS_NS is not set > +# CONFIG_PID_NS is not set > +CONFIG_BLK_DEV_INITRD=y > +CONFIG_INITRAMFS_SOURCE="../../arc_initramfs_hs/" > +CONFIG_EMBEDDED=y > +CONFIG_PERF_EVENTS=y > +# CONFIG_VM_EVENT_COUNTERS is not set > +# CONFIG_COMPAT_BRK is not set > +CONFIG_SLAB=y > +CONFIG_ARC_PLAT_HSDK=y > +CONFIG_ISA_ARCV2=y > +CONFIG_SMP=y > +CONFIG_LINUX_LINK_BASE=0x90000000 > +CONFIG_ARC_BUILTIN_DTB_NAME="hsdk" > +CONFIG_PREEMPT=y > +# CONFIG_COMPACTION is not set > +CONFIG_NET=y > +CONFIG_PACKET=y > +CONFIG_UNIX=y > +CONFIG_INET=y > +CONFIG_DEVTMPFS=y > +# CONFIG_STANDALONE is not set > +# CONFIG_PREVENT_FIRMWARE_BUILD is not set > +# CONFIG_FIRMWARE_IN_KERNEL is not set > +CONFIG_SCSI=y > +CONFIG_BLK_DEV_SD=y > +CONFIG_NETDEVICES=y > +CONFIG_STMMAC_ETH=y > +CONFIG_DP83867_PHY=y > +CONFIG_MICREL_PHY=y > +# CONFIG_INPUT_KEYBOARD is not set > +# CONFIG_INPUT_MOUSE is not set > +# CONFIG_SERIO is not set > +# CONFIG_LEGACY_PTYS is not set > +CONFIG_SERIAL_8250=y > +CONFIG_SERIAL_8250_CONSOLE=y > +CONFIG_SERIAL_8250_DW=y > +CONFIG_SERIAL_OF_PLATFORM=y > +# CONFIG_HW_RANDOM is not set > +# CONFIG_HWMON is not set > +CONFIG_USB=y > +CONFIG_USB_EHCI_HCD=y > +CONFIG_USB_EHCI_HCD_PLATFORM=y > +CONFIG_USB_OHCI_HCD=y > +CONFIG_USB_OHCI_HCD_PLATFORM=y > +CONFIG_USB_STORAGE=y > +CONFIG_MMC=y > +CONFIG_MMC_SDHCI=y > +CONFIG_MMC_SDHCI_PLTFM=y > +CONFIG_MMC_DW=y > +# CONFIG_IOMMU_SUPPORT is not set > +CONFIG_EXT3_FS=y > +CONFIG_VFAT_FS=y > +CONFIG_TMPFS=y > +CONFIG_NLS_CODEPAGE_437=y > +CONFIG_NLS_ISO8859_1=y > +# CONFIG_ENABLE_WARN_DEPRECATED is not set > +# CONFIG_ENABLE_MUST_CHECK is not set > +CONFIG_STRIP_ASM_SYMS=y > +CONFIG_LOCKUP_DETECTOR=y > +CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=10 > +# CONFIG_SCHED_DEBUG is not set > +# CONFIG_DEBUG_PREEMPT is not set > +# CONFIG_FTRACE is not set > diff --git a/arch/arc/kernel/devtree.c b/arch/arc/kernel/devtree.c > index 3b67f538f142..172749f908c6 100644 > --- a/arch/arc/kernel/devtree.c > +++ b/arch/arc/kernel/devtree.c > @@ -33,6 +33,8 @@ static void __init arc_set_early_base_baud(unsigned long dt_root) > arc_base_baud = 33333333; /* Fixed 33MHz clk (AXS10x) */ > else if (of_flat_dt_is_compatible(dt_root, "ezchip,arc-nps")) > arc_base_baud = 800000000; /* Fixed 800MHz clk (NPS) */ > + else if (of_flat_dt_is_compatible(dt_root, "snps,hsdk")) > + arc_base_baud = 33330000; /* Fixed 33.33MHz clk (HSDK) */ And this is not same as 3333_3333 ? > else > arc_base_baud = 50000000; /* Fixed default 50MHz */ > } > diff --git a/arch/arc/plat-hsdk/Kconfig b/arch/arc/plat-hsdk/Kconfig > new file mode 100644 > index 000000000000..0e9d3155272e > --- /dev/null > +++ b/arch/arc/plat-hsdk/Kconfig > @@ -0,0 +1,12 @@ > +# > +# Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com) 2017 ? > +# > +# This program is free software; you can redistribute it and/or modify > +# it under the terms of the GNU General Public License version 2 as > +# published by the Free Software Foundation. > +# > + > +menuconfig ARC_PLAT_HSDK > + bool "ARC HS Development Kit board" > + help > + Support for ARC HS Development Kit board > diff --git a/arch/arc/plat-hsdk/Makefile b/arch/arc/plat-hsdk/Makefile > new file mode 100644 > index 000000000000..292d6d99d023 > --- /dev/null > +++ b/arch/arc/plat-hsdk/Makefile > @@ -0,0 +1,9 @@ > +# > +# Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com) 2017 ? > +# > +# This program is free software; you can redistribute it and/or modify > +# it under the terms of the GNU General Public License version 2 as > +# published by the Free Software Foundation. > +# > + > +obj-y := platform.o > diff --git a/arch/arc/plat-hsdk/platform.c b/arch/arc/plat-hsdk/platform.c > new file mode 100644 > index 000000000000..68381fbe2c94 > --- /dev/null > +++ b/arch/arc/plat-hsdk/platform.c > @@ -0,0 +1,73 @@ > +/* > + * ARC HSDK Platform support code > + * > + * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com) 2017 ? > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation. > + */ > + > +#include <linux/init.h> > +#include <linux/smp.h> > +#include <asm/arcregs.h> > +#include <asm/io.h> > +#include <asm/mach_desc.h> > + > +/* > + * By default ICCM is mapped to 0x7z while this area is used for > + * Virtual kernel mappings, so move it to currently unused area. > + */ > +void relocate_iccm(void) __init, static > +{ > + if (cpuinfo_arc700[smp_processor_id()].iccm.sz) > + write_aux_reg(ARC_REG_AUX_ICCM, 0x60000000); > +} > + > +/* > + * Default configuration of PAE regs doesn't work for us causeing > + * problems with DMA to/from peripherals even if PAE40 is not used. > + */ > +void fixup_pae_regs(void) ditto ! > +{ > +#define ARC_PERIPHERAL_BASE 0xf0000000 > +#define CREG_BASE (ARC_PERIPHERAL_BASE + 0x1000) > +#define CREG_PAE (CREG_BASE + 0x180) > +#define CREG_PAE_UPDATE (CREG_BASE + 0x194) > + > + /* Default is 1, which means "PAE offset = 4GByte" */ > + writel(0, (void __iomem *) CREG_PAE); can we use the relaxed version (needs to be done for AXS as well, but snce we are starting a new platform - might as well use the right APIs to begin with ! > + > + /* Really apply settings made above */ > + writel(1, (void __iomem *) CREG_PAE_UPDATE); > +} > + > +static void hsdk_early_init(void) __init ? > +{ > + relocate_iccm(); > + fixup_pae_regs(); > +} > + > +static void hsdk_init_per_cpu(unsigned int cpu) > +{ > + relocate_iccm(); > +} > + > +/*----------------------- Machine Descriptions ------------------------------ > + * > + * Machine description is simply a set of platform/board specific callbacks > + * This is not directly related to DeviceTree based dynamic device creation, > + * however as part of early device tree scan, we also select the right > + * callback set, by matching the DT compatible name. > + */ > + > +static const char *hsdk_compat[] __initconst = { > + "snps,hsdk", > + NULL, > +}; > + > +MACHINE_START(SIMULATION, "hsdk") > + .dt_compat = hsdk_compat, > + .init_early = hsdk_early_init, > + .init_per_cpu = hsdk_init_per_cpu, > +MACHINE_END >
