arm: support for Cavium Celestial CNC1800L

.gitignore

@@ -52,6 +52,7 @@
 *.zst
 Module.symvers
 modules.order
+uImage
 
 #
 # Top-level generic files

arch/arm/Kconfig

@@ -432,6 +432,8 @@ source "arch/arm/mach-bcm/Kconfig"
 
 source "arch/arm/mach-berlin/Kconfig"
 
+source "arch/arm/mach-celestial/Kconfig"
+
 source "arch/arm/mach-clps711x/Kconfig"
 
 source "arch/arm/mach-cns3xxx/Kconfig"

arch/arm/Kconfig.debug

@@ -293,6 +293,14 @@ choice
 		  If you have a Broadcom STB chip and would like early print
 		  messages to appear over the UART, select this option.
 
+	config DEBUG_CELESTIAL_UART
+		bool "Kernel low-level debugging on CNC1800L"
+		depends on MACH_CELESTIAL
+		select DEBUG_UART_8250
+		help
+		  Say Y here if you want kernel low-level debugging support
+		  on Celestial platforms.
+
 	config DEBUG_CLPS711X_UART1
 		bool "Kernel low-level debugging messages via UART1"
 		depends on ARCH_CLPS711X
@@ -1622,6 +1630,7 @@ config DEBUG_UART_8250
 
 config DEBUG_UART_PHYS
 	hex "Physical base address of debug UART"
+	default 0x801f1000 if DEBUG_CELESTIAL_UART
 	default 0x01c20000 if DEBUG_DAVINCI_DMx_UART0
 	default 0x01c28000 if DEBUG_SUNXI_UART0
 	default 0x01c28400 if DEBUG_SUNXI_UART1
@@ -1764,6 +1773,7 @@ config DEBUG_UART_PHYS
 
 config DEBUG_UART_VIRT
 	hex "Virtual base address of debug UART"
+	default 0xfec00000 if DEBUG_CELESTIAL_UART
 	default 0xc881f000 if DEBUG_RV1108_UART2
 	default 0xc8821000 if DEBUG_RV1108_UART1
 	default 0xc8912000 if DEBUG_RV1108_UART0

arch/arm/Makefile

@@ -168,6 +168,7 @@ machine-$(CONFIG_ARCH_AT91)		+= at91
 machine-$(CONFIG_ARCH_AXXIA)		+= axxia
 machine-$(CONFIG_ARCH_BCM)		+= bcm
 machine-$(CONFIG_ARCH_BERLIN)		+= berlin
+machine-$(CONFIG_MACH_CELESTIAL)	+= celestial
 machine-$(CONFIG_ARCH_CLPS711X)		+= clps711x
 machine-$(CONFIG_ARCH_CNS3XXX)		+= cns3xxx
 machine-$(CONFIG_ARCH_DAVINCI)		+= davinci

arch/arm/boot/dts/Makefile

@@ -5,6 +5,8 @@ dtb-$(CONFIG_MACH_ARTPEC6) += \
 	artpec6-devboard.dtb
 dtb-$(CONFIG_MACH_ASM9260) += \
 	alphascale-asm9260-devkit.dtb
+dtb-$(CONFIG_MACH_CELESTIAL) += \
+	celestial-cnc1800l.dtb
 # Keep at91 dtb files sorted alphabetically for each SoC
 dtb-$(CONFIG_SOC_AT91RM9200) += \
 	at91rm9200ek.dtb \

arch/arm/boot/dts/celestial-cnc1800l.dts

@@ -0,0 +1,118 @@
+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	interrupt-parent = <&vic>;
+    model = "Cavium Celestial CNC1800L";
+    compatible = "cavium,cnc1800l";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+    chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+
+	memory {
+		device_type = "memory";
+		reg = <0x00000000 0x088fffff>;
+	};
+
+	cpus {
+		#address-cells = <0>;
+		#size-cells = <0>;
+
+		cpu {
+			compatible = "arm,arm1176jzf";
+			device_type = "cpu";
+		};
+	};
+
+    clocks{
+        timclk: timclk{
+            compatible = "fixed-clock";
+            #clock-cells = <0>;
+            clock-frequency = <94500000>;
+        };
+        pclk: pclk{
+            compatible = "fixed-clock";
+            #clock-cells = <0>;
+            clock-frequency = <47250000>;
+        };
+    };
+
+    vic: interrupt-controller@10130000 {
+		compatible = "snps,dw-apb-ictl";
+		reg = <0x80140000 0x1000>;
+		interrupt-controller;
+		#interrupt-cells = <1>;
+	};
+
+	timer0: timer@801e2000 {
+		compatible = "snps,dw-apb-timer-cnc1800l";
+		reg = <0x801e2000 0x100>;
+        clocks = <&pclk>;
+	};
+
+	timer1: timer@80270000 {
+		compatible = "cavium,cnc1800l-timer";
+		reg = <0x80270000 0x100>;
+		clocks = <&timclk>;
+		interrupts = <4>;
+	};
+
+	watchdog0: wd@801e1000 {
+		compatible = "snps,dw-wdt", "cavium,cnc1800l-wdt";
+		reg = <0x801e1000 0x100>;
+		interrupts = <0>;
+		clocks = <&timclk>;
+	};
+
+
+	uart0: serial@801f1000 {
+		compatible = "snps,dw-apb-uart";
+		reg = <0x801f1000 0x100>;
+		reg-io-width = <1>;
+		clocks = <&pclk>;
+		interrupts = <12>;
+		reg-shift = <2>;
+	};
+
+	clock-controller@b2100000  {
+			compatible = "cavium,cnc1800l-clockctrl";
+			reg = <0xb2100000 0x1000>;
+			clocks = <&pclk>;
+	};
+
+	usb0: ohci@80210000 {
+		compatible = "cavium,cnc1800l-ohci", "usb-ohci";
+		reg = <0x80210000 0x1000>;
+		interrupts = <27>;
+	};
+
+	usb1: ehci@80210000 {
+		compatible = "cavium,cnc1800l-ehci", "usb-ehci";
+		reg = <0x80200000 0x1000>;
+		interrupts = <22>;
+	};
+
+	nand0: nand@a4000000 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "cavium,cnc1800l-nand";
+		reg = 	<0x80100000 0x48>,			//SMC
+				<0xa4000000 0x2000000>;		//NAND
+	};
+
+	gpio@80260000 {
+		compatible = "cavium,cnc1800l-gpio";
+		reg = <0x80260000 0x100>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		// interrupts = <6>;
+		cavium,nrdevs = <14>;
+	};
+};

arch/arm/mach-celestial/Kconfig

@@ -0,0 +1,8 @@
+config MACH_CELESTIAL
+	bool "Celestial CNC1800L"
+	depends on ARCH_MULTI_V6
+	select DW_APB_ICTL
+	select SERIAL_8250
+	select SERIAL_8250_CONSOLE
+	help
+	  Support for Cavium CNC1800L Soc.

arch/arm/mach-celestial/Makefile

@@ -0,0 +1 @@
+obj-$(CONFIG_MACH_CELESTIAL)		:= cnc1800l_machine.o

arch/arm/mach-celestial/cnc1800l_machine.c

@@ -0,0 +1,79 @@
+#include <linux/clocksource.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/arm-gic.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/clk-provider.h>
+#include <linux/regmap.h>
+#include <linux/smp.h>
+#include <asm/smp_scu.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/psci.h>
+#include <linux/arm-smccc.h>
+
+#define CNC1800L_VIRT_UART0 0xfec00000
+#define CNC1800L_PHYS_UART0 0x801f1000
+
+static struct map_desc cnc1800l_of_io_desc[] __initdata = {
+#ifdef CONFIG_DEBUG_CELESTIAL_UART
+	{
+		.virtual = CNC1800L_VIRT_UART0,
+		.pfn = __phys_to_pfn(CNC1800L_PHYS_UART0),
+		.length = SZ_4K,
+		.type = MT_DEVICE,
+	},
+#endif
+};
+
+static void __init cnc1800l_of_map_io(void)
+{
+	iotable_init(cnc1800l_of_io_desc, ARRAY_SIZE(cnc1800l_of_io_desc));
+}
+
+static void __init cnc1800l_init_machine(void)
+{
+    return;
+}
+
+//based on board_bcm281xx.c
+static void cnc1800l_restart(enum reboot_mode mode, const char *cmd){
+	struct device_node *np_wdog;
+	unsigned short __iomem *p;
+	np_wdog = of_find_compatible_node(NULL, NULL, "cavium,cnc1800l-wdt");
+	if (!np_wdog) {
+		pr_emerg("Couldn't find cavium,cnc1800l-wdt\n");
+		return;
+	}
+	p = (unsigned short*)of_iomap(np_wdog, 0);
+	of_node_put(np_wdog);
+	if (!p) {
+		pr_emerg("failed to obtain wdt vaddress\n");
+		return;
+	}
+	/* WDT_TORR */
+	p[2] = 0x0;					
+	p[3] = 0x0; 
+	/* WDT_CCVR */
+	p[4] = 0x0;
+	p[5] = 0x0;
+	//reload
+	*((u32*)&p[6]) = 0x76;
+	/* WDT_CR, enable WDT and generated System Reset */
+	p[0] = 0x1;
+	while(1);
+}
+
+static const char * const cnc1800l_dt_match[] = {
+	"cavium,cnc1800l",
+	NULL
+};
+
+DT_MACHINE_START(CNC1800L, "Cavium Celestial CNC1800L")
+	.map_io		= cnc1800l_of_map_io,
+	.init_machine	= cnc1800l_init_machine,
+	.restart	= cnc1800l_restart,
+	.dt_compat	= cnc1800l_dt_match,
+MACHINE_END