diff options
Diffstat (limited to 'kernel/arch/arm/mach-sunxi')
| -rw-r--r-- | kernel/arch/arm/mach-sunxi/Kconfig | 48 | ||||
| -rw-r--r-- | kernel/arch/arm/mach-sunxi/Makefile | 2 | ||||
| -rw-r--r-- | kernel/arch/arm/mach-sunxi/platsmp.c | 123 | ||||
| -rw-r--r-- | kernel/arch/arm/mach-sunxi/sunxi.c | 85 |
4 files changed, 258 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-sunxi/Kconfig b/kernel/arch/arm/mach-sunxi/Kconfig new file mode 100644 index 000000000..81502b90d --- /dev/null +++ b/kernel/arch/arm/mach-sunxi/Kconfig @@ -0,0 +1,48 @@ +menuconfig ARCH_SUNXI + bool "Allwinner SoCs" if ARCH_MULTI_V7 + select ARCH_REQUIRE_GPIOLIB + select ARCH_HAS_RESET_CONTROLLER + select CLKSRC_MMIO + select GENERIC_IRQ_CHIP + select PINCTRL + select SUN4I_TIMER + select RESET_CONTROLLER + +if ARCH_SUNXI + +config MACH_SUN4I + bool "Allwinner A10 (sun4i) SoCs support" + default ARCH_SUNXI + +config MACH_SUN5I + bool "Allwinner A10s / A13 (sun5i) SoCs support" + default ARCH_SUNXI + select SUN5I_HSTIMER + +config MACH_SUN6I + bool "Allwinner A31 (sun6i) SoCs support" + default ARCH_SUNXI + select ARM_GIC + select MFD_SUN6I_PRCM + select SUN5I_HSTIMER + +config MACH_SUN7I + bool "Allwinner A20 (sun7i) SoCs support" + default ARCH_SUNXI + select ARM_GIC + select ARM_PSCI + select HAVE_ARM_ARCH_TIMER + select SUN5I_HSTIMER + +config MACH_SUN8I + bool "Allwinner A23 (sun8i) SoCs support" + default ARCH_SUNXI + select ARM_GIC + select MFD_SUN6I_PRCM + +config MACH_SUN9I + bool "Allwinner (sun9i) SoCs support" + default ARCH_SUNXI + select ARM_GIC + +endif diff --git a/kernel/arch/arm/mach-sunxi/Makefile b/kernel/arch/arm/mach-sunxi/Makefile new file mode 100644 index 000000000..27b168f12 --- /dev/null +++ b/kernel/arch/arm/mach-sunxi/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_ARCH_SUNXI) += sunxi.o +obj-$(CONFIG_SMP) += platsmp.o diff --git a/kernel/arch/arm/mach-sunxi/platsmp.c b/kernel/arch/arm/mach-sunxi/platsmp.c new file mode 100644 index 000000000..587b0468e --- /dev/null +++ b/kernel/arch/arm/mach-sunxi/platsmp.c @@ -0,0 +1,123 @@ +/* + * SMP support for Allwinner SoCs + * + * Copyright (C) 2013 Maxime Ripard + * + * Maxime Ripard <maxime.ripard@free-electrons.com> + * + * Based on code + * Copyright (C) 2012-2013 Allwinner Ltd. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/memory.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/smp.h> + +#define CPUCFG_CPU_PWR_CLAMP_STATUS_REG(cpu) ((cpu) * 0x40 + 0x64) +#define CPUCFG_CPU_RST_CTRL_REG(cpu) (((cpu) + 1) * 0x40) +#define CPUCFG_CPU_CTRL_REG(cpu) (((cpu) + 1) * 0x40 + 0x04) +#define CPUCFG_CPU_STATUS_REG(cpu) (((cpu) + 1) * 0x40 + 0x08) +#define CPUCFG_GEN_CTRL_REG 0x184 +#define CPUCFG_PRIVATE0_REG 0x1a4 +#define CPUCFG_PRIVATE1_REG 0x1a8 +#define CPUCFG_DBG_CTL0_REG 0x1e0 +#define CPUCFG_DBG_CTL1_REG 0x1e4 + +#define PRCM_CPU_PWROFF_REG 0x100 +#define PRCM_CPU_PWR_CLAMP_REG(cpu) (((cpu) * 4) + 0x140) + +static void __iomem *cpucfg_membase; +static void __iomem *prcm_membase; + +static DEFINE_SPINLOCK(cpu_lock); + +static void __init sun6i_smp_prepare_cpus(unsigned int max_cpus) +{ + struct device_node *node; + + node = of_find_compatible_node(NULL, NULL, "allwinner,sun6i-a31-prcm"); + if (!node) { + pr_err("Missing A31 PRCM node in the device tree\n"); + return; + } + + prcm_membase = of_iomap(node, 0); + if (!prcm_membase) { + pr_err("Couldn't map A31 PRCM registers\n"); + return; + } + + node = of_find_compatible_node(NULL, NULL, + "allwinner,sun6i-a31-cpuconfig"); + if (!node) { + pr_err("Missing A31 CPU config node in the device tree\n"); + return; + } + + cpucfg_membase = of_iomap(node, 0); + if (!cpucfg_membase) + pr_err("Couldn't map A31 CPU config registers\n"); + +} + +static int sun6i_smp_boot_secondary(unsigned int cpu, + struct task_struct *idle) +{ + u32 reg; + int i; + + if (!(prcm_membase && cpucfg_membase)) + return -EFAULT; + + spin_lock(&cpu_lock); + + /* Set CPU boot address */ + writel(virt_to_phys(secondary_startup), + cpucfg_membase + CPUCFG_PRIVATE0_REG); + + /* Assert the CPU core in reset */ + writel(0, cpucfg_membase + CPUCFG_CPU_RST_CTRL_REG(cpu)); + + /* Assert the L1 cache in reset */ + reg = readl(cpucfg_membase + CPUCFG_GEN_CTRL_REG); + writel(reg & ~BIT(cpu), cpucfg_membase + CPUCFG_GEN_CTRL_REG); + + /* Disable external debug access */ + reg = readl(cpucfg_membase + CPUCFG_DBG_CTL1_REG); + writel(reg & ~BIT(cpu), cpucfg_membase + CPUCFG_DBG_CTL1_REG); + + /* Power up the CPU */ + for (i = 0; i <= 8; i++) + writel(0xff >> i, prcm_membase + PRCM_CPU_PWR_CLAMP_REG(cpu)); + mdelay(10); + + /* Clear CPU power-off gating */ + reg = readl(prcm_membase + PRCM_CPU_PWROFF_REG); + writel(reg & ~BIT(cpu), prcm_membase + PRCM_CPU_PWROFF_REG); + mdelay(1); + + /* Deassert the CPU core reset */ + writel(3, cpucfg_membase + CPUCFG_CPU_RST_CTRL_REG(cpu)); + + /* Enable back the external debug accesses */ + reg = readl(cpucfg_membase + CPUCFG_DBG_CTL1_REG); + writel(reg | BIT(cpu), cpucfg_membase + CPUCFG_DBG_CTL1_REG); + + spin_unlock(&cpu_lock); + + return 0; +} + +static struct smp_operations sun6i_smp_ops __initdata = { + .smp_prepare_cpus = sun6i_smp_prepare_cpus, + .smp_boot_secondary = sun6i_smp_boot_secondary, +}; +CPU_METHOD_OF_DECLARE(sun6i_a31_smp, "allwinner,sun6i-a31", &sun6i_smp_ops); diff --git a/kernel/arch/arm/mach-sunxi/sunxi.c b/kernel/arch/arm/mach-sunxi/sunxi.c new file mode 100644 index 000000000..1bc811a74 --- /dev/null +++ b/kernel/arch/arm/mach-sunxi/sunxi.c @@ -0,0 +1,85 @@ +/* + * Device Tree support for Allwinner A1X SoCs + * + * Copyright (C) 2012 Maxime Ripard + * + * Maxime Ripard <maxime.ripard@free-electrons.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/clk-provider.h> +#include <linux/clocksource.h> +#include <linux/init.h> +#include <linux/platform_device.h> + +#include <asm/mach/arch.h> + +static void __init sunxi_dt_cpufreq_init(void) +{ + platform_device_register_simple("cpufreq-dt", -1, NULL, 0); +} + +static const char * const sunxi_board_dt_compat[] = { + "allwinner,sun4i-a10", + "allwinner,sun5i-a10s", + "allwinner,sun5i-a13", + NULL, +}; + +DT_MACHINE_START(SUNXI_DT, "Allwinner A1X (Device Tree)") + .dt_compat = sunxi_board_dt_compat, + .init_late = sunxi_dt_cpufreq_init, +MACHINE_END + +static const char * const sun6i_board_dt_compat[] = { + "allwinner,sun6i-a31", + "allwinner,sun6i-a31s", + NULL, +}; + +extern void __init sun6i_reset_init(void); +static void __init sun6i_timer_init(void) +{ + of_clk_init(NULL); + if (IS_ENABLED(CONFIG_RESET_CONTROLLER)) + sun6i_reset_init(); + clocksource_of_init(); +} + +DT_MACHINE_START(SUN6I_DT, "Allwinner sun6i (A31) Family") + .init_time = sun6i_timer_init, + .dt_compat = sun6i_board_dt_compat, + .init_late = sunxi_dt_cpufreq_init, +MACHINE_END + +static const char * const sun7i_board_dt_compat[] = { + "allwinner,sun7i-a20", + NULL, +}; + +DT_MACHINE_START(SUN7I_DT, "Allwinner sun7i (A20) Family") + .dt_compat = sun7i_board_dt_compat, + .init_late = sunxi_dt_cpufreq_init, +MACHINE_END + +static const char * const sun8i_board_dt_compat[] = { + "allwinner,sun8i-a23", + NULL, +}; + +DT_MACHINE_START(SUN8I_DT, "Allwinner sun8i (A23) Family") + .dt_compat = sun8i_board_dt_compat, + .init_late = sunxi_dt_cpufreq_init, +MACHINE_END + +static const char * const sun9i_board_dt_compat[] = { + "allwinner,sun9i-a80", + NULL, +}; + +DT_MACHINE_START(SUN9I_DT, "Allwinner sun9i Family") + .dt_compat = sun9i_board_dt_compat, +MACHINE_END |