ARM: hisi: enable hix5hd2 SoC

Enable support for the Hisilicon HiX5HD2 SoC. This HiX5HD2 SoC series
support both single and dual Cortex-A9 cores.

Add ARCH_HIX5HD2 to distinguish HiX5HD2 from Hi3xxx.

They are different in implementation such as SMP, IPs integarted and
earlycon configure.

Signed-off-by: Haifeng Yan <yanhaifeng@gmail.com>
Signed-off-by: Jiancheng Xue <jchxue@gmail.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Acked-by: Wei Xu <xuwei5@hisilicon.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

diff --git a/Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt b/Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt
index df0a452b8526de02bc935f235123acb7ae87b54c..934f00025cc4cad127340b485f3eaeb411964802 100644 (file)
--- a/Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt
+++ b/Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt
@@ -31,6 +31,17 @@ Example:
                reboot-offset = <0x4>;
        };
 
+-----------------------------------------------------------------------
+Hisilicon CPU controller
+
+Required properties:
+- compatible : "hisilicon,cpuctrl"
+- reg : Register address and size
+
+The clock registers and power registers of secondary cores are defined
+in CPU controller, especially in HIX5HD2 SoC.
+
+-----------------------------------------------------------------------
 PCTRL: Peripheral misc control register
 
 Required Properties:

diff --git a/arch/arm/mach-hisi/Kconfig b/arch/arm/mach-hisi/Kconfig
index da16efd3c927d983ba7aa7a8a66a77bbdb6662c4..90fdbb4ae00aad383dee10befe8dd851464ae6c0 100644 (file)
--- a/arch/arm/mach-hisi/Kconfig
+++ b/arch/arm/mach-hisi/Kconfig
@@ -10,15 +10,24 @@ if ARCH_HISI
 menu "Hisilicon platform type"
 
 config ARCH_HI3xxx
-       bool "Hisilicon Hi36xx/Hi37xx family" if ARCH_MULTI_V7
+       bool "Hisilicon Hi36xx family" if ARCH_MULTI_V7
        select CACHE_L2X0
        select HAVE_ARM_SCU if SMP
        select HAVE_ARM_TWD if SMP
        select PINCTRL
        select PINCTRL_SINGLE
        help
-         Support for Hisilicon Hi36xx/Hi37xx processor family
+         Support for Hisilicon Hi36xx SoC family
 
+config ARCH_HIX5HD2
+       bool "Hisilicon X5HD2 family" if ARCH_MULTI_V7
+       select CACHE_L2X0
+       select HAVE_ARM_SCU if SMP
+       select HAVE_ARM_TWD if SMP
+       select PINCTRL
+       select PINCTRL_SINGLE
+       help
+         Support for Hisilicon HIX5HD2 SoC family
 endmenu
 
 endif

diff --git a/arch/arm/mach-hisi/Makefile b/arch/arm/mach-hisi/Makefile
index 2ae1b59267c23373af3c5dacd0876eec3c7d8f99..ee2506b9cde3c3bd660cbf49b4f0f146b2130f81 100644 (file)
--- a/arch/arm/mach-hisi/Makefile
+++ b/arch/arm/mach-hisi/Makefile
@@ -3,4 +3,4 @@
 #
 
 obj-y  += hisilicon.o
-obj-$(CONFIG_SMP)              += platsmp.o hotplug.o
+obj-$(CONFIG_SMP)              += platsmp.o hotplug.o headsmp.o

diff --git a/arch/arm/mach-hisi/core.h b/arch/arm/mach-hisi/core.h
index af23ec204538754440e4c822bf4d7bd6337fa970..88b1f487d06581683ef420d9924d1f614904f147 100644 (file)
--- a/arch/arm/mach-hisi/core.h
+++ b/arch/arm/mach-hisi/core.h
@@ -12,4 +12,9 @@ extern void hi3xxx_cpu_die(unsigned int cpu);
 extern int hi3xxx_cpu_kill(unsigned int cpu);
 extern void hi3xxx_set_cpu(int cpu, bool enable);
 
+extern void hix5hd2_secondary_startup(void);
+extern struct smp_operations hix5hd2_smp_ops;
+extern void hix5hd2_set_cpu(int cpu, bool enable);
+extern void hix5hd2_cpu_die(unsigned int cpu);
+
 #endif

diff --git a/arch/arm/mach-hisi/headsmp.S b/arch/arm/mach-hisi/headsmp.S
new file mode 100644 (file)
index 0000000..278889c
--- /dev/null
+++ b/arch/arm/mach-hisi/headsmp.S
@@ -0,0 +1,16 @@
+/*
+ *  Copyright (c) 2014 Hisilicon Limited.
+ *  Copyright (c) 2014 Linaro Ltd.
+ *
+ * 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/linkage.h>
+#include <linux/init.h>
+
+       __CPUINIT
+
+ENTRY(hix5hd2_secondary_startup)
+       bl      v7_invalidate_l1
+       b       secondary_startup

diff --git a/arch/arm/mach-hisi/hisilicon.c b/arch/arm/mach-hisi/hisilicon.c
index 741faf3e710062457a5dc1f25b5e89dcb82c1f27..2bfbe3f1392d34a584f44f72821f4fc52f63f122 100644 (file)
--- a/arch/arm/mach-hisi/hisilicon.c
+++ b/arch/arm/mach-hisi/hisilicon.c
@@ -88,3 +88,15 @@ DT_MACHINE_START(HI3620, "Hisilicon Hi3620 (Flattened Device Tree)")
        .smp            = smp_ops(hi3xxx_smp_ops),
        .restart        = hi3xxx_restart,
 MACHINE_END
+
+static const char *hix5hd2_compat[] __initconst = {
+       "hisilicon,hix5hd2",
+       NULL,
+};
+
+DT_MACHINE_START(HIX5HD2_DT, "Hisilicon HIX5HD2 (Flattened Device Tree)")
+       .dt_compat      = hix5hd2_compat,
+       .init_late      = hi3xxx_init_late,
+       .smp            = smp_ops(hix5hd2_smp_ops),
+       .restart        = hi3xxx_restart,
+MACHINE_END

diff --git a/arch/arm/mach-hisi/hotplug.c b/arch/arm/mach-hisi/hotplug.c
index abd441b0c60425a9b196a10bbcb181d4ebbaa09e..84e6919f68c7316f3b866a0ba61087066eaa111d 100644 (file)
--- a/arch/arm/mach-hisi/hotplug.c
+++ b/arch/arm/mach-hisi/hotplug.c
@@ -57,6 +57,14 @@
 #define CPU0_NEON_SRST_REQ_EN          (1 << 4)
 #define CPU0_SRST_REQ_EN               (1 << 0)
 
+#define HIX5HD2_PERI_CRG20             0x50
+#define CRG20_CPU1_RESET               (1 << 17)
+
+#define HIX5HD2_PERI_PMC0              0x1000
+#define PMC0_CPU1_WAIT_MTCOMS_ACK      (1 << 8)
+#define PMC0_CPU1_PMC_ENABLE           (1 << 7)
+#define PMC0_CPU1_POWERDOWN            (1 << 3)
+
 enum {
        HI3620_CTRL,
        ERROR_CTRL,
@@ -157,6 +165,50 @@ void hi3xxx_set_cpu(int cpu, bool enable)
                set_cpu_hi3620(cpu, enable);
 }
 
+static bool hix5hd2_hotplug_init(void)
+{
+       struct device_node *np;
+
+       np = of_find_compatible_node(NULL, NULL, "hisilicon,cpuctrl");
+       if (np) {
+               ctrl_base = of_iomap(np, 0);
+               return true;
+       }
+       return false;
+}
+
+void hix5hd2_set_cpu(int cpu, bool enable)
+{
+       u32 val = 0;
+
+       if (!ctrl_base)
+               if (!hix5hd2_hotplug_init())
+                       BUG();
+
+       if (enable) {
+               /* power on cpu1 */
+               val = readl_relaxed(ctrl_base + HIX5HD2_PERI_PMC0);
+               val &= ~(PMC0_CPU1_WAIT_MTCOMS_ACK | PMC0_CPU1_POWERDOWN);
+               val |= PMC0_CPU1_PMC_ENABLE;
+               writel_relaxed(val, ctrl_base + HIX5HD2_PERI_PMC0);
+               /* unreset */
+               val = readl_relaxed(ctrl_base + HIX5HD2_PERI_CRG20);
+               val &= ~CRG20_CPU1_RESET;
+               writel_relaxed(val, ctrl_base + HIX5HD2_PERI_CRG20);
+       } else {
+               /* power down cpu1 */
+               val = readl_relaxed(ctrl_base + HIX5HD2_PERI_PMC0);
+               val |= PMC0_CPU1_PMC_ENABLE | PMC0_CPU1_POWERDOWN;
+               val &= ~PMC0_CPU1_WAIT_MTCOMS_ACK;
+               writel_relaxed(val, ctrl_base + HIX5HD2_PERI_PMC0);
+
+               /* reset */
+               val = readl_relaxed(ctrl_base + HIX5HD2_PERI_CRG20);
+               val |= CRG20_CPU1_RESET;
+               writel_relaxed(val, ctrl_base + HIX5HD2_PERI_CRG20);
+       }
+}
+
 static inline void cpu_enter_lowpower(void)
 {
        unsigned int v;
@@ -199,4 +251,10 @@ int hi3xxx_cpu_kill(unsigned int cpu)
        hi3xxx_set_cpu(cpu, false);
        return 1;
 }
+
+void hix5hd2_cpu_die(unsigned int cpu)
+{
+       flush_cache_all();
+       hix5hd2_set_cpu(cpu, false);
+}
 #endif

diff --git a/arch/arm/mach-hisi/platsmp.c b/arch/arm/mach-hisi/platsmp.c
index 471f1ee3be2b90d538b37b4185a9f481a600e64e..ecf7058d5c158a9c01742fb6deb8b803c224fbf8 100644 (file)
--- a/arch/arm/mach-hisi/platsmp.c
+++ b/arch/arm/mach-hisi/platsmp.c
@@ -17,6 +17,8 @@
 
 #include "core.h"
 
+#define HIX5HD2_BOOT_ADDRESS           0xffff0000
+
 static void __iomem *ctrl_base;
 
 void hi3xxx_set_cpu_jump(int cpu, void *jump_addr)
@@ -35,11 +37,9 @@ int hi3xxx_get_cpu_jump(int cpu)
        return readl_relaxed(ctrl_base + ((cpu - 1) << 2));
 }
 
-static void __init hi3xxx_smp_prepare_cpus(unsigned int max_cpus)
+static void __init hisi_enable_scu_a9(void)
 {
-       struct device_node *np = NULL;
        unsigned long base = 0;
-       u32 offset = 0;
        void __iomem *scu_base = NULL;
 
        if (scu_a9_has_base()) {
@@ -52,6 +52,14 @@ static void __init hi3xxx_smp_prepare_cpus(unsigned int max_cpus)
                scu_enable(scu_base);
                iounmap(scu_base);
        }
+}
+
+static void __init hi3xxx_smp_prepare_cpus(unsigned int max_cpus)
+{
+       struct device_node *np = NULL;
+       u32 offset = 0;
+
+       hisi_enable_scu_a9();
        if (!ctrl_base) {
                np = of_find_compatible_node(NULL, NULL, "hisilicon,sysctrl");
                if (!np) {
@@ -87,3 +95,39 @@ struct smp_operations hi3xxx_smp_ops __initdata = {
        .cpu_kill               = hi3xxx_cpu_kill,
 #endif
 };
+
+static void __init hix5hd2_smp_prepare_cpus(unsigned int max_cpus)
+{
+       hisi_enable_scu_a9();
+}
+
+void hix5hd2_set_scu_boot_addr(phys_addr_t start_addr, phys_addr_t jump_addr)
+{
+       void __iomem *virt;
+
+       virt = ioremap(start_addr, PAGE_SIZE);
+
+       writel_relaxed(0xe51ff004, virt);       /* ldr pc, [rc, #-4] */
+       writel_relaxed(jump_addr, virt + 4);    /* pc jump phy address */
+       iounmap(virt);
+}
+
+static int hix5hd2_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+       phys_addr_t jumpaddr;
+
+       jumpaddr = virt_to_phys(hix5hd2_secondary_startup);
+       hix5hd2_set_scu_boot_addr(HIX5HD2_BOOT_ADDRESS, jumpaddr);
+       hix5hd2_set_cpu(cpu, true);
+       arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+       return 0;
+}
+
+
+struct smp_operations hix5hd2_smp_ops __initdata = {
+       .smp_prepare_cpus       = hix5hd2_smp_prepare_cpus,
+       .smp_boot_secondary     = hix5hd2_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+       .cpu_die                = hix5hd2_cpu_die,
+#endif
+};