[PATCH] Add support for Realtek RTL838x/RTL839x switch SoCs
From: Bert Vermeulen
Date: Tue Dec 15 2020 - 14:11:13 EST
Signed-off-by: Bert Vermeulen <bert@xxxxxxxx>
---
arch/mips/Kbuild.platforms | 1 +
arch/mips/Kconfig | 20 +++
arch/mips/include/asm/mach-realtek/ioremap.h | 29 ++++
arch/mips/include/asm/mach-realtek/irq.h | 69 ++++++++
.../include/asm/mach-realtek/mach-realtek.h | 69 ++++++++
arch/mips/realtek/Makefile | 1 +
arch/mips/realtek/Platform | 6 +
arch/mips/realtek/irq.c | 157 ++++++++++++++++++
arch/mips/realtek/prom.c | 126 ++++++++++++++
arch/mips/realtek/setup.c | 58 +++++++
10 files changed, 536 insertions(+)
create mode 100644 arch/mips/include/asm/mach-realtek/ioremap.h
create mode 100644 arch/mips/include/asm/mach-realtek/irq.h
create mode 100644 arch/mips/include/asm/mach-realtek/mach-realtek.h
create mode 100644 arch/mips/realtek/Makefile
create mode 100644 arch/mips/realtek/Platform
create mode 100644 arch/mips/realtek/irq.c
create mode 100644 arch/mips/realtek/prom.c
create mode 100644 arch/mips/realtek/setup.c
diff --git a/arch/mips/Kbuild.platforms b/arch/mips/Kbuild.platforms
index 5483e38b5dc7..e9adc6e7d1d3 100644
--- a/arch/mips/Kbuild.platforms
+++ b/arch/mips/Kbuild.platforms
@@ -22,6 +22,7 @@ platform-$(CONFIG_NLM_COMMON) += netlogic/
platform-$(CONFIG_PIC32MZDA) += pic32/
platform-$(CONFIG_MACH_PISTACHIO) += pistachio/
platform-$(CONFIG_RALINK) += ralink/
+platform-$(CONFIG_MACH_REALTEK) += realtek/
platform-$(CONFIG_MIKROTIK_RB532) += rb532/
platform-$(CONFIG_SGI_IP22) += sgi-ip22/
platform-$(CONFIG_SGI_IP27) += sgi-ip27/
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 6b762bebff33..58966ebaed5b 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -624,6 +624,26 @@ config RALINK
select ARCH_HAS_RESET_CONTROLLER
select RESET_CONTROLLER
+config MACH_REALTEK
+ bool "Realtek RTL8380 based machines"
+ select DMA_NONCOHERENT
+ select IRQ_MIPS_CPU
+ select CSRC_R4K
+ select CEVT_R4K
+ select SYS_HAS_CPU_MIPS32_R1
+ select SYS_HAS_CPU_MIPS32_R2
+ select SYS_SUPPORTS_BIG_ENDIAN
+ select SYS_SUPPORTS_32BIT_KERNEL
+ select SYS_SUPPORTS_MIPS16
+ select SYS_SUPPORTS_MULTITHREADING
+ select SYS_SUPPORTS_VPE_LOADER
+ select SYS_HAS_EARLY_PRINTK
+ select SYS_HAS_EARLY_PRINTK_8250
+ select USE_GENERIC_EARLY_PRINTK_8250
+ select BOOT_RAW
+ select PINCTRL
+ select USE_OF
+
config SGI_IP22
bool "SGI IP22 (Indy/Indigo2)"
select ARC_MEMORY
diff --git a/arch/mips/include/asm/mach-realtek/ioremap.h b/arch/mips/include/asm/mach-realtek/ioremap.h
new file mode 100644
index 000000000000..8847d0b99dad
--- /dev/null
+++ b/arch/mips/include/asm/mach-realtek/ioremap.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _RTL8380_IOREMAP_H_
+#define _RTL8380_IOREMAP_H_
+
+static inline int is_rtl8380_internal_registers(phys_addr_t offset)
+{
+ /* IO-Block */
+ if (offset >= 0xb8000000 && offset < 0xb9000000)
+ return 1;
+ /* Switch block */
+ if (offset >= 0xbb000000 && offset < 0xbc000000)
+ return 1;
+ return 0;
+}
+
+static inline void __iomem *plat_ioremap(phys_addr_t offset, unsigned long size,
+ unsigned long flags)
+{
+ if (is_rtl8380_internal_registers(offset))
+ return (void __iomem *)offset;
+ return NULL;
+}
+
+static inline int plat_iounmap(const volatile void __iomem *addr)
+{
+ return is_rtl8380_internal_registers((unsigned long)addr);
+}
+
+#endif /* _RTL8380_IOREMAP_H_ */
diff --git a/arch/mips/include/asm/mach-realtek/irq.h b/arch/mips/include/asm/mach-realtek/irq.h
new file mode 100644
index 000000000000..e2e2cd6dd27a
--- /dev/null
+++ b/arch/mips/include/asm/mach-realtek/irq.h
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2006-2012 Tony Wu <tonywu@xxxxxxxxxxx>
+ * Copyright (C) 2020 Birger Koblitz <mail@xxxxxxxxxxxxxxxxx>
+ * Copyright (C) 2020 Bert Vermeulen <bert@xxxxxxxx>
+ * Copyright (C) 2020 John Crispin <john@xxxxxxxxxxx>
+ */
+
+#ifndef _RTL8380_IRQ_H_
+#define _RTL8380_IRQ_H_
+
+#define NR_IRQS 32
+#include_next <irq.h>
+
+/* Global Interrupt Mask Register */
+#define RTL8380_ICTL_GIMR 0x00
+/* Global Interrupt Status Register */
+#define RTL8380_ICTL_GISR 0x04
+
+/* Cascaded interrupts */
+#define RTL8380_CPU_IRQ_SHARED0 (MIPS_CPU_IRQ_BASE + 2)
+#define RTL8380_CPU_IRQ_UART (MIPS_CPU_IRQ_BASE + 3)
+#define RTL8380_CPU_IRQ_SWITCH (MIPS_CPU_IRQ_BASE + 4)
+#define RTL8380_CPU_IRQ_SHARED1 (MIPS_CPU_IRQ_BASE + 5)
+#define RTL8380_CPU_IRQ_EXTERNAL (MIPS_CPU_IRQ_BASE + 6)
+#define RTL8380_CPU_IRQ_COUNTER (MIPS_CPU_IRQ_BASE + 7)
+
+
+/* Interrupt routing register */
+#define RTL8380_IRR0 0x08
+#define RTL8380_IRR1 0x0c
+#define RTL8380_IRR2 0x10
+#define RTL8380_IRR3 0x14
+
+/* Cascade map */
+#define RTL8380_IRQ_CASCADE_UART0 2
+#define RTL8380_IRQ_CASCADE_UART1 1
+#define RTL8380_IRQ_CASCADE_TC0 5
+#define RTL8380_IRQ_CASCADE_TC1 1
+#define RTL8380_IRQ_CASCADE_OCPTO 1
+#define RTL8380_IRQ_CASCADE_HLXTO 1
+#define RTL8380_IRQ_CASCADE_SLXTO 1
+#define RTL8380_IRQ_CASCADE_NIC 4
+#define RTL8380_IRQ_CASCADE_GPIO_ABCD 4
+#define RTL8380_IRQ_CASCADE_GPIO_EFGH 4
+#define RTL8380_IRQ_CASCADE_RTC 4
+#define RTL8380_IRQ_CASCADE_SWCORE 3
+#define RTL8380_IRQ_CASCADE_WDT_IP1 4
+#define RTL8380_IRQ_CASCADE_WDT_IP2 5
+
+/* Pack cascade map into interrupt routing registers */
+#define RTL8380_IRR0_SETTING (\
+ (RTL8380_IRQ_CASCADE_UART0 << 28) | \
+ (RTL8380_IRQ_CASCADE_UART1 << 24) | \
+ (RTL8380_IRQ_CASCADE_TC0 << 20) | \
+ (RTL8380_IRQ_CASCADE_TC1 << 16) | \
+ (RTL8380_IRQ_CASCADE_OCPTO << 12) | \
+ (RTL8380_IRQ_CASCADE_HLXTO << 8) | \
+ (RTL8380_IRQ_CASCADE_SLXTO << 4) | \
+ (RTL8380_IRQ_CASCADE_NIC << 0))
+#define RTL8380_IRR1_SETTING (\
+ (RTL8380_IRQ_CASCADE_GPIO_ABCD << 28) | \
+ (RTL8380_IRQ_CASCADE_GPIO_EFGH << 24) | \
+ (RTL8380_IRQ_CASCADE_RTC << 20) | \
+ (RTL8380_IRQ_CASCADE_SWCORE << 16))
+#define RTL8380_IRR2_SETTING 0
+#define RTL8380_IRR3_SETTING 0
+
+#endif /* _RTL8380_IRQ_H_ */
diff --git a/arch/mips/include/asm/mach-realtek/mach-realtek.h b/arch/mips/include/asm/mach-realtek/mach-realtek.h
new file mode 100644
index 000000000000..bc6b1e57c00a
--- /dev/null
+++ b/arch/mips/include/asm/mach-realtek/mach-realtek.h
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2006-2012 Tony Wu <tonywu@xxxxxxxxxxx>
+ * Copyright (C) 2020 Birger Koblitz <mail@xxxxxxxxxxxxxxxxx>
+ * Copyright (C) 2020 Bert Vermeulen <bert@xxxxxxxx>
+ * Copyright (C) 2020 John Crispin <john@xxxxxxxxxxx>
+ */
+
+#ifndef _MACH_REALTEK_H_
+#define _MACH_REALTEK_H_
+
+struct realtek_soc_info {
+ unsigned char *name;
+ unsigned int id;
+ unsigned int family;
+};
+
+/* High 16 bits of MODEL_NAME_INFO register */
+#define RTL8389_FAMILY_ID 0x8389
+#define RTL8328_FAMILY_ID 0x8328
+#define RTL8390_FAMILY_ID 0x8390
+#define RTL8350_FAMILY_ID 0x8350
+#define RTL8380_FAMILY_ID 0x8380
+#define RTL8330_FAMILY_ID 0x8330
+
+/* Interrupt numbers/bits */
+#define RTL8380_IRQ_UART0 31
+#define RTL8380_IRQ_UART1 30
+#define RTL8380_IRQ_TC0 29
+#define RTL8380_IRQ_TC1 28
+#define RTL8380_IRQ_OCPTO 27
+#define RTL8380_IRQ_HLXTO 26
+#define RTL8380_IRQ_SLXTO 25
+#define RTL8380_IRQ_NIC 24
+#define RTL8380_IRQ_GPIO_ABCD 23
+#define RTL8380_IRQ_GPIO_EFGH 22
+#define RTL8380_IRQ_RTC 21
+#define RTL8380_IRQ_SWCORE 20
+#define RTL8380_IRQ_WDT_IP1 19
+#define RTL8380_IRQ_WDT_IP2 18
+
+
+// TODO: move to DT
+#define RTL8380_SWITCH_BASE ((volatile void *) 0xBB000000)
+#define RTL8380_MODEL_NAME_INFO (RTL8380_SWITCH_BASE + 0x00D4)
+#define RTL8390_MODEL_NAME_INFO (RTL8380_SWITCH_BASE + 0x0FF0)
+
+/* GMII pinmux on RTL838x */
+#define RTL8380_GMII_INTF_SEL (RTL8380_SWITCH_BASE + 0x1000)
+#define RTL8380_GMII_INTF_SEL_UART1 BIT(4)
+#define RTL8380_GMII_INTF_SEL_JTAG (BIT(2) | BIT(3))
+#define RTL8380_GMII_INTF_SEL_GMII (BIT(0) | BIT(1))
+
+/* GMII pinmux on RTL839x */
+#define RTL8390_MAC_IF_CTRL (RTL8380_SWITCH_BASE + 0x04)
+#define RTL8390_MAC_IF_CTRL_JTAG BIT(1)
+#define RTL8390_MAC_IF_CTRL_UART BIT(0)
+
+/* Used to detect address length pin strapping on RTL833x/RTL838x */
+#define RTL8380_INT_RW_CTRL (RTL8380_SWITCH_BASE + 0x58)
+#define RTL8380_EXT_VERSION (RTL8380_SWITCH_BASE + 0xD0)
+#define RTL8380_PLL_CML_CTRL (RTL8380_SWITCH_BASE + 0xFF8)
+#define RTL8380_STRAP_DBG (RTL8380_SWITCH_BASE + 0x100C)
+
+/* Reset */
+#define RTL8380_RST_GLB_CTRL_1 (RTL8380_SWITCH_BASE + 0x40)
+#define RTL8390_RST_GLB_CTRL (RTL8380_SWITCH_BASE + 0x14)
+
+#endif /* _MACH_RTL8380_H_ */
diff --git a/arch/mips/realtek/Makefile b/arch/mips/realtek/Makefile
new file mode 100644
index 000000000000..4616928e9883
--- /dev/null
+++ b/arch/mips/realtek/Makefile
@@ -0,0 +1 @@
+obj-y := setup.o prom.o irq.o
diff --git a/arch/mips/realtek/Platform b/arch/mips/realtek/Platform
new file mode 100644
index 000000000000..6e6b29b82b81
--- /dev/null
+++ b/arch/mips/realtek/Platform
@@ -0,0 +1,6 @@
+#
+# Realtek RTL8380 SoCs
+#
+platform-$(CONFIG_MACH_REALTEK) += realtek/
+cflags-$(CONFIG_MACH_REALTEK) += -I$(srctree)/arch/mips/include/asm/mach-realtek/
+load-$(CONFIG_MACH_REALTEK) += 0xffffffff80000000
diff --git a/arch/mips/realtek/irq.c b/arch/mips/realtek/irq.c
new file mode 100644
index 000000000000..99c0adb56de3
--- /dev/null
+++ b/arch/mips/realtek/irq.c
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2006-2012 Tony Wu <tonywu@xxxxxxxxxxx>
+ * Copyright (C) 2020 Birger Koblitz <mail@xxxxxxxxxxxxxxxxx>
+ * Copyright (C) 2020 Bert Vermeulen <bert@xxxxxxxx>
+ * Copyright (C) 2020 John Crispin <john@xxxxxxxxxxx>
+ */
+
+#include <linux/irqchip.h>
+#include <linux/spinlock.h>
+#include <linux/of_address.h>
+#include <asm/irq_cpu.h>
+#include <linux/of_irq.h>
+#include <asm/cevt-r4k.h>
+
+#include <mach-realtek.h>
+#include "irq.h"
+
+#define REG(x) (realtek_ictl_base + x)
+
+extern struct realtek_soc_info soc_info;
+
+static DEFINE_RAW_SPINLOCK(irq_lock);
+static void __iomem *realtek_ictl_base;
+
+static void realtek_ictl_enable_irq(struct irq_data *i)
+{
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&irq_lock, flags);
+
+ value = readl(REG(RTL8380_ICTL_GIMR));
+ value |= BIT(i->hwirq);
+ writel(value, REG(RTL8380_ICTL_GIMR));
+
+ raw_spin_unlock_irqrestore(&irq_lock, flags);
+}
+
+static void realtek_ictl_disable_irq(struct irq_data *i)
+{
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&irq_lock, flags);
+
+ value = readl(REG(RTL8380_ICTL_GIMR));
+ value &= ~BIT(i->hwirq);
+ writel(value, REG(RTL8380_ICTL_GIMR));
+
+ raw_spin_unlock_irqrestore(&irq_lock, flags);
+}
+
+static struct irq_chip realtek_ictl_irq = {
+ .name = "rtl8380",
+ .irq_enable = realtek_ictl_enable_irq,
+ .irq_disable = realtek_ictl_disable_irq,
+ .irq_ack = realtek_ictl_disable_irq,
+ .irq_mask = realtek_ictl_disable_irq,
+ .irq_unmask = realtek_ictl_enable_irq,
+ .irq_eoi = realtek_ictl_enable_irq,
+};
+
+static int intc_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
+{
+ irq_set_chip_and_handler(hw, &realtek_ictl_irq, handle_level_irq);
+
+ return 0;
+}
+
+static const struct irq_domain_ops irq_domain_ops = {
+ .map = intc_map,
+ .xlate = irq_domain_xlate_onecell,
+};
+
+static void realtek_irq_dispatch(struct irq_desc *desc)
+{
+ unsigned int pending = readl(REG(RTL8380_ICTL_GIMR)) & readl(REG(RTL8380_ICTL_GISR));
+
+ if (pending) {
+ struct irq_domain *domain = irq_desc_get_handler_data(desc);
+ generic_handle_irq(irq_find_mapping(domain, __ffs(pending)));
+ } else {
+ spurious_interrupt();
+ }
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+ unsigned int pending;
+
+ pending = read_c0_cause() & read_c0_status() & ST0_IM;
+
+ if (pending & CAUSEF_IP7)
+ do_IRQ(RTL8380_CPU_IRQ_COUNTER);
+
+ else if (pending & CAUSEF_IP6)
+ do_IRQ(RTL8380_CPU_IRQ_EXTERNAL);
+
+ else if (pending & CAUSEF_IP5)
+ do_IRQ(RTL8380_CPU_IRQ_SHARED1);
+
+ else if (pending & CAUSEF_IP4)
+ do_IRQ(RTL8380_CPU_IRQ_SWITCH);
+
+ else if (pending & CAUSEF_IP3)
+ do_IRQ(RTL8380_CPU_IRQ_UART);
+
+ else if (pending & CAUSEF_IP2)
+ do_IRQ(RTL8380_CPU_IRQ_SHARED0);
+
+ else
+ spurious_interrupt();
+}
+
+static void __init icu_of_init(struct device_node *node, struct device_node *parent)
+{
+ struct irq_domain *domain;
+
+ domain = irq_domain_add_simple(node, 32, 0,
+ &irq_domain_ops, NULL);
+ irq_set_chained_handler_and_data(2, realtek_irq_dispatch, domain);
+ irq_set_chained_handler_and_data(5, realtek_irq_dispatch, domain);
+
+ realtek_ictl_base = of_iomap(node, 0);
+ if (!realtek_ictl_base)
+ return;
+
+ /* Disable all cascaded interrupts */
+ writel(0, REG(RTL8380_ICTL_GIMR));
+
+ /* Set up interrupt routing */
+ writel(RTL8380_IRR0_SETTING, REG(RTL8380_IRR0));
+ writel(RTL8380_IRR1_SETTING, REG(RTL8380_IRR1));
+ writel(RTL8380_IRR2_SETTING, REG(RTL8380_IRR2));
+ writel(RTL8380_IRR3_SETTING, REG(RTL8380_IRR3));
+
+ /* Clear timer interrupt */
+ write_c0_compare(0);
+
+ /* Enable all CPU interrupts */
+ write_c0_status(read_c0_status() | ST0_IM);
+
+ /* Enable timer0 and uart0 interrupts */
+ writel(BIT(RTL8380_IRQ_TC0) | BIT(RTL8380_IRQ_UART0), REG(RTL8380_ICTL_GIMR));
+}
+
+static struct of_device_id __initdata of_irq_ids[] = {
+ { .compatible = "mti,cpu-interrupt-controller", .data = mips_cpu_irq_of_init },
+ { .compatible = "realtek,rtl8380-intc", .data = icu_of_init },
+ {},
+};
+
+void __init arch_init_irq(void)
+{
+ of_irq_init(of_irq_ids);
+}
diff --git a/arch/mips/realtek/prom.c b/arch/mips/realtek/prom.c
new file mode 100644
index 000000000000..be9d34282969
--- /dev/null
+++ b/arch/mips/realtek/prom.c
@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2006-2012 Tony Wu <tonywu@xxxxxxxxxxx>
+ * Copyright (C) 2020 Birger Koblitz <mail@xxxxxxxxxxxxxxxxx>
+ * Copyright (C) 2020 Bert Vermeulen <bert@xxxxxxxx>
+ * Copyright (C) 2020 John Crispin <john@xxxxxxxxxxx>
+ */
+
+#include <linux/of.h>
+#include <linux/of_fdt.h>
+#include <linux/libfdt.h>
+#include <asm/prom.h>
+
+#include <mach-realtek.h>
+
+extern char arcs_cmdline[];
+extern const char __appended_dtb;
+
+struct realtek_soc_info soc_info;
+const void *fdt;
+
+
+const char *get_system_type(void)
+{
+ return soc_info.name;
+}
+
+void __init prom_free_prom_memory(void)
+{
+ return;
+}
+
+void __init device_tree_init(void)
+{
+ if (!fdt_check_header(&__appended_dtb)) {
+ fdt = &__appended_dtb;
+ pr_info("Using appended Device Tree.\n");
+ }
+ initial_boot_params = (void *)fdt;
+ unflatten_and_copy_device_tree();
+}
+
+static void __init prom_init_cmdline(void)
+{
+ int argc = fw_arg0;
+ char **argv = (char **) KSEG1ADDR(fw_arg1);
+ int i;
+
+ arcs_cmdline[0] = '\0';
+
+ for (i = 0; i < argc; i++) {
+ char *p = (char *) KSEG1ADDR(argv[i]);
+
+ if (CPHYSADDR(p) && *p) {
+ strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
+ strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
+ }
+ }
+ pr_info("Kernel command line: %s\n", arcs_cmdline);
+}
+
+void __init prom_init(void)
+{
+ void *dtb;
+ uint32_t model;
+
+ /* uart0 */
+ setup_8250_early_printk_port(0xb8002000, 2, 0);
+
+ model = readl(RTL8380_MODEL_NAME_INFO) >> 16;
+ if (model != 0x8330 && model != 0x8332 &&
+ model != 0x8380 && model != 0x8382 )
+ model = readl(RTL8390_MODEL_NAME_INFO) >> 16;
+
+ soc_info.id = model;
+
+ switch (model) {
+ case 0x8328:
+ soc_info.name="RTL8328";
+ soc_info.family = RTL8328_FAMILY_ID;
+ break;
+ case 0x8332:
+ soc_info.name="RTL8332";
+ soc_info.family = RTL8380_FAMILY_ID;
+ break;
+ case 0x8380:
+ soc_info.name="RTL8380";
+ soc_info.family = RTL8380_FAMILY_ID;
+ break;
+ case 0x8382:
+ soc_info.name="RTL8382";
+ soc_info.family = RTL8380_FAMILY_ID;
+ break;
+ case 0x8390:
+ soc_info.name="RTL8390";
+ soc_info.family = RTL8390_FAMILY_ID;
+ break;
+ case 0x8391:
+ soc_info.name="RTL8391";
+ soc_info.family = RTL8390_FAMILY_ID;
+ break;
+ case 0x8392:
+ soc_info.name="RTL8392";
+ soc_info.family = RTL8390_FAMILY_ID;
+ break;
+ case 0x8393:
+ soc_info.name="RTL8393";
+ soc_info.family = RTL8390_FAMILY_ID;
+ break;
+ default:
+ soc_info.name="DEFAULT";
+ soc_info.family = 0;
+ }
+ pr_info("SoC Type: %s\n", soc_info.name);
+ prom_init_cmdline();
+
+ if (fw_passed_dtb)
+ dtb = (void *)fw_passed_dtb;
+ else if (__dtb_start != __dtb_end)
+ dtb = (void *)__dtb_start;
+ else
+ panic("no dtb found");
+
+ __dt_setup_arch(dtb);
+}
+
diff --git a/arch/mips/realtek/setup.c b/arch/mips/realtek/setup.c
new file mode 100644
index 000000000000..00b6af2fd541
--- /dev/null
+++ b/arch/mips/realtek/setup.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2006-2012 Tony Wu <tonywu@xxxxxxxxxxx>
+ * Copyright (C) 2020 Birger Koblitz <mail@xxxxxxxxxxxxxxxxx>
+ * Copyright (C) 2020 Bert Vermeulen <bert@xxxxxxxx>
+ * Copyright (C) 2020 John Crispin <john@xxxxxxxxxxx>
+ */
+
+#include <linux/of_fdt.h>
+#include <asm/reboot.h>
+#include <asm/time.h>
+#include <mach-realtek.h>
+
+extern struct realtek_soc_info soc_info;
+
+static void realtek_restart(char *command)
+{
+ if (soc_info.family == RTL8380_FAMILY_ID) {
+ /* Reset Global Control1 Register */
+ writel(1, RTL8380_RST_GLB_CTRL_1);
+ } else if (soc_info.family == RTL8390_FAMILY_ID) {
+ /* If calling reset vector fails, reset entire chip */
+ writel(0xFFFFFFFF, RTL8390_RST_GLB_CTRL);
+ }
+}
+
+static void realtek_halt(void)
+{
+ printk("System halted.\n");
+ while(1);
+}
+
+void __init plat_mem_setup(void)
+{
+ set_io_port_base(KSEG1);
+
+ _machine_restart = realtek_restart;
+ _machine_halt = realtek_halt;
+}
+
+void __init plat_time_init(void)
+{
+ struct device_node *np;
+ u32 freq = 500000000;
+
+ np = of_find_node_by_name(NULL, "cpus");
+ if (!np) {
+ pr_err("Missing 'cpus' DT node, using default frequency.");
+ } else {
+ if (of_property_read_u32(np, "frequency", &freq) < 0)
+ pr_err("No 'frequency' property in DT, using default.");
+ else
+ pr_info("CPU frequency from device tree: %d", freq);
+ of_node_put(np);
+ }
+
+ mips_hpt_frequency = freq / 2;
+}
--
2.25.1