diff options
Diffstat (limited to 'kernel/arch/arm/mach-zx')
| -rw-r--r-- | kernel/arch/arm/mach-zx/Kconfig | 19 | ||||
| -rw-r--r-- | kernel/arch/arm/mach-zx/Makefile | 2 | ||||
| -rw-r--r-- | kernel/arch/arm/mach-zx/core.h | 19 | ||||
| -rw-r--r-- | kernel/arch/arm/mach-zx/headsmp.S | 33 | ||||
| -rw-r--r-- | kernel/arch/arm/mach-zx/platsmp.c | 189 | ||||
| -rw-r--r-- | kernel/arch/arm/mach-zx/zx296702-pm-domain.c | 202 | ||||
| -rw-r--r-- | kernel/arch/arm/mach-zx/zx296702.c | 25 |
7 files changed, 489 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-zx/Kconfig b/kernel/arch/arm/mach-zx/Kconfig new file mode 100644 index 000000000..446334a25 --- /dev/null +++ b/kernel/arch/arm/mach-zx/Kconfig @@ -0,0 +1,19 @@ +menuconfig ARCH_ZX + bool "ZTE ZX family" if ARCH_MULTI_V7 + help + Support for ZTE ZX-based family of processors. TV + set-top-box processor is supported. More will be + added soon. + +if ARCH_ZX + +config SOC_ZX296702 + def_bool y + select ARM_GIC + select ARM_GLOBAL_TIMER + select HAVE_ARM_SCU if SMP + select HAVE_ARM_TWD if SMP + select PM_GENERIC_DOMAINS if PM + help + Support for ZTE ZX296702 SoC which is a dual core CortexA9MP +endif diff --git a/kernel/arch/arm/mach-zx/Makefile b/kernel/arch/arm/mach-zx/Makefile new file mode 100644 index 000000000..a4b486433 --- /dev/null +++ b/kernel/arch/arm/mach-zx/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_SOC_ZX296702) += zx296702.o zx296702-pm-domain.o +obj-$(CONFIG_SMP) += headsmp.o platsmp.o diff --git a/kernel/arch/arm/mach-zx/core.h b/kernel/arch/arm/mach-zx/core.h new file mode 100644 index 000000000..3efe8e038 --- /dev/null +++ b/kernel/arch/arm/mach-zx/core.h @@ -0,0 +1,19 @@ +/* + * Copyright 2014 Linaro Ltd. + * Copyright (C) 2014 ZTE Corporation. + * + * 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. + */ + +#ifndef __MACH_ZX_CORE_H +#define __MACH_ZX_CORE_H + +extern void zx_resume_jump(void); +extern size_t zx_suspend_iram_sz; +extern unsigned long zx_secondary_startup_pa; + +void zx_secondary_startup(void); + +#endif /* __MACH_ZX_CORE_H */ diff --git a/kernel/arch/arm/mach-zx/headsmp.S b/kernel/arch/arm/mach-zx/headsmp.S new file mode 100644 index 000000000..a1aa40283 --- /dev/null +++ b/kernel/arch/arm/mach-zx/headsmp.S @@ -0,0 +1,33 @@ +/* + * Copyright 2014 Linaro Ltd. + * Copyright (C) 2014 ZTE Corporation. + * + * 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> + + .align 3 + .arm + +/* It runs from physical address */ +ENTRY(zx_resume_jump) + adr r1, zx_secondary_startup_pa + ldr r0, [r1] + bx r0 +ENDPROC(zx_resume_jump) + +ENTRY(zx_secondary_startup_pa) + .word zx_secondary_startup_pa + +ENTRY(zx_suspend_iram_sz) + .word . - zx_resume_jump +ENDPROC(zx_secondary_startup_pa) + + +ENTRY(zx_secondary_startup) + bl v7_invalidate_l1 + b secondary_startup +ENDPROC(zx_secondary_startup) diff --git a/kernel/arch/arm/mach-zx/platsmp.c b/kernel/arch/arm/mach-zx/platsmp.c new file mode 100644 index 000000000..a3693982d --- /dev/null +++ b/kernel/arch/arm/mach-zx/platsmp.c @@ -0,0 +1,189 @@ +/* + * Copyright 2014 Linaro Ltd. + * Copyright (C) 2014 ZTE Corporation. + * + * 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/delay.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/jiffies.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/smp.h> + +#include <asm/cacheflush.h> +#include <asm/cp15.h> +#include <asm/fncpy.h> +#include <asm/proc-fns.h> +#include <asm/smp_scu.h> +#include <asm/smp_plat.h> + +#include "core.h" + +#define AON_SYS_CTRL_RESERVED1 0xa8 + +#define BUS_MATRIX_REMAP_CONFIG 0x00 + +#define PCU_CPU0_CTRL 0x00 +#define PCU_CPU1_CTRL 0x04 +#define PCU_CPU1_ST 0x0c +#define PCU_GLOBAL_CTRL 0x14 +#define PCU_EXPEND_CONTROL 0x34 + +#define ZX_IRAM_BASE 0x00200000 + +static void __iomem *pcu_base; +static void __iomem *matrix_base; +static void __iomem *scu_base; + +void __init zx_smp_prepare_cpus(unsigned int max_cpus) +{ + struct device_node *np; + unsigned long base = 0; + void __iomem *aonsysctrl_base; + void __iomem *sys_iram; + + base = scu_a9_get_base(); + scu_base = ioremap(base, SZ_256); + if (!scu_base) { + pr_err("%s: failed to map scu\n", __func__); + return; + } + + scu_enable(scu_base); + + np = of_find_compatible_node(NULL, NULL, "zte,sysctrl"); + if (!np) { + pr_err("%s: failed to find sysctrl node\n", __func__); + return; + } + + aonsysctrl_base = of_iomap(np, 0); + if (!aonsysctrl_base) { + pr_err("%s: failed to map aonsysctrl\n", __func__); + of_node_put(np); + return; + } + + /* + * Write the address of secondary startup into the + * system-wide flags register. The BootMonitor waits + * until it receives a soft interrupt, and then the + * secondary CPU branches to this address. + */ + __raw_writel(virt_to_phys(zx_secondary_startup), + aonsysctrl_base + AON_SYS_CTRL_RESERVED1); + + iounmap(aonsysctrl_base); + of_node_put(np); + + np = of_find_compatible_node(NULL, NULL, "zte,zx296702-pcu"); + pcu_base = of_iomap(np, 0); + of_node_put(np); + WARN_ON(!pcu_base); + + np = of_find_compatible_node(NULL, NULL, "zte,zx-bus-matrix"); + matrix_base = of_iomap(np, 0); + of_node_put(np); + WARN_ON(!matrix_base); + + /* Map the first 4 KB IRAM for suspend usage */ + sys_iram = __arm_ioremap_exec(ZX_IRAM_BASE, PAGE_SIZE, false); + zx_secondary_startup_pa = virt_to_phys(zx_secondary_startup); + fncpy(sys_iram, &zx_resume_jump, zx_suspend_iram_sz); +} + +static int zx_boot_secondary(unsigned int cpu, struct task_struct *idle) +{ + static bool first_boot = true; + + if (first_boot) { + arch_send_wakeup_ipi_mask(cpumask_of(cpu)); + first_boot = false; + return 0; + } + + /* Swap the base address mapping between IRAM and IROM */ + writel_relaxed(0x1, matrix_base + BUS_MATRIX_REMAP_CONFIG); + + /* Power on CPU1 */ + writel_relaxed(0x0, pcu_base + PCU_CPU1_CTRL); + + /* Wait for power on ack */ + while (readl_relaxed(pcu_base + PCU_CPU1_ST) & 0x4) + cpu_relax(); + + /* Swap back the mapping of IRAM and IROM */ + writel_relaxed(0x0, matrix_base + BUS_MATRIX_REMAP_CONFIG); + + return 0; +} + +#ifdef CONFIG_HOTPLUG_CPU +static inline void cpu_enter_lowpower(void) +{ + unsigned int v; + + asm volatile( + "mcr p15, 0, %1, c7, c5, 0\n" + " mcr p15, 0, %1, c7, c10, 4\n" + /* + * Turn off coherency + */ + " mrc p15, 0, %0, c1, c0, 1\n" + " bic %0, %0, %3\n" + " mcr p15, 0, %0, c1, c0, 1\n" + " mrc p15, 0, %0, c1, c0, 0\n" + " bic %0, %0, %2\n" + " mcr p15, 0, %0, c1, c0, 0\n" + : "=&r" (v) + : "r" (0), "Ir" (CR_C), "Ir" (0x40) + : "cc"); +} + +static int zx_cpu_kill(unsigned int cpu) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(2000); + + writel_relaxed(0x2, pcu_base + PCU_CPU1_CTRL); + + while ((readl_relaxed(pcu_base + PCU_CPU1_ST) & 0x3) != 0x0) { + if (time_after(jiffies, timeout)) { + pr_err("*** cpu1 poweroff timeout\n"); + break; + } + } + return 1; +} + +static void zx_cpu_die(unsigned int cpu) +{ + scu_power_mode(scu_base, SCU_PM_POWEROFF); + cpu_enter_lowpower(); + + while (1) + cpu_do_idle(); +} +#endif + +static void zx_secondary_init(unsigned int cpu) +{ + scu_power_mode(scu_base, SCU_PM_NORMAL); +} + +struct smp_operations zx_smp_ops __initdata = { + .smp_prepare_cpus = zx_smp_prepare_cpus, + .smp_secondary_init = zx_secondary_init, + .smp_boot_secondary = zx_boot_secondary, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_kill = zx_cpu_kill, + .cpu_die = zx_cpu_die, +#endif +}; + +CPU_METHOD_OF_DECLARE(zx_smp, "zte,zx296702-smp", &zx_smp_ops); diff --git a/kernel/arch/arm/mach-zx/zx296702-pm-domain.c b/kernel/arch/arm/mach-zx/zx296702-pm-domain.c new file mode 100644 index 000000000..e08574d4e --- /dev/null +++ b/kernel/arch/arm/mach-zx/zx296702-pm-domain.c @@ -0,0 +1,202 @@ +/* + * Copyright (C) 2015 Linaro Ltd. + * + * Author: Jun Nie <jun.nie@linaro.org> + * License terms: GNU General Public License (GPL) version 2 + */ +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/pm_domain.h> +#include <linux/slab.h> + +#define PCU_DM_CLKEN 0x18 +#define PCU_DM_RSTEN 0x1C +#define PCU_DM_ISOEN 0x20 +#define PCU_DM_PWRDN 0x24 +#define PCU_DM_ACK_SYNC 0x28 + +enum { + PCU_DM_NEON0 = 0, + PCU_DM_NEON1, + PCU_DM_GPU, + PCU_DM_DECPPU, + PCU_DM_VOU, + PCU_DM_R2D, + PCU_DM_TOP, +}; + +static void __iomem *pcubase; + +struct zx_pm_domain { + struct generic_pm_domain dm; + unsigned int bit; +}; + +static int normal_power_off(struct generic_pm_domain *domain) +{ + struct zx_pm_domain *zpd = (struct zx_pm_domain *)domain; + unsigned long loop = 1000; + u32 tmp; + + tmp = readl_relaxed(pcubase + PCU_DM_CLKEN); + tmp &= ~BIT(zpd->bit); + writel_relaxed(tmp, pcubase + PCU_DM_CLKEN); + udelay(5); + + tmp = readl_relaxed(pcubase + PCU_DM_ISOEN); + tmp &= ~BIT(zpd->bit); + writel_relaxed(tmp | BIT(zpd->bit), pcubase + PCU_DM_ISOEN); + udelay(5); + + tmp = readl_relaxed(pcubase + PCU_DM_RSTEN); + tmp &= ~BIT(zpd->bit); + writel_relaxed(tmp, pcubase + PCU_DM_RSTEN); + udelay(5); + + tmp = readl_relaxed(pcubase + PCU_DM_PWRDN); + tmp &= ~BIT(zpd->bit); + writel_relaxed(tmp | BIT(zpd->bit), pcubase + PCU_DM_PWRDN); + do { + tmp = readl_relaxed(pcubase + PCU_DM_ACK_SYNC) & BIT(zpd->bit); + } while (--loop && !tmp); + + if (!loop) { + pr_err("Error: %s %s fail\n", __func__, domain->name); + return -EIO; + } + + return 0; +} + +static int normal_power_on(struct generic_pm_domain *domain) +{ + struct zx_pm_domain *zpd = (struct zx_pm_domain *)domain; + unsigned long loop = 10000; + u32 tmp; + + tmp = readl_relaxed(pcubase + PCU_DM_PWRDN); + tmp &= ~BIT(zpd->bit); + writel_relaxed(tmp, pcubase + PCU_DM_PWRDN); + do { + tmp = readl_relaxed(pcubase + PCU_DM_ACK_SYNC) & BIT(zpd->bit); + } while (--loop && tmp); + + if (!loop) { + pr_err("Error: %s %s fail\n", __func__, domain->name); + return -EIO; + } + + tmp = readl_relaxed(pcubase + PCU_DM_RSTEN); + tmp &= ~BIT(zpd->bit); + writel_relaxed(tmp | BIT(zpd->bit), pcubase + PCU_DM_RSTEN); + udelay(5); + + tmp = readl_relaxed(pcubase + PCU_DM_ISOEN); + tmp &= ~BIT(zpd->bit); + writel_relaxed(tmp, pcubase + PCU_DM_ISOEN); + udelay(5); + + tmp = readl_relaxed(pcubase + PCU_DM_CLKEN); + tmp &= ~BIT(zpd->bit); + writel_relaxed(tmp | BIT(zpd->bit), pcubase + PCU_DM_CLKEN); + udelay(5); + return 0; +} + +static struct zx_pm_domain gpu_domain = { + .dm = { + .name = "gpu_domain", + .power_off = normal_power_off, + .power_on = normal_power_on, + }, + .bit = PCU_DM_GPU, +}; + +static struct zx_pm_domain decppu_domain = { + .dm = { + .name = "decppu_domain", + .power_off = normal_power_off, + .power_on = normal_power_on, + }, + .bit = PCU_DM_DECPPU, +}; + +static struct zx_pm_domain vou_domain = { + .dm = { + .name = "vou_domain", + .power_off = normal_power_off, + .power_on = normal_power_on, + }, + .bit = PCU_DM_VOU, +}; + +static struct zx_pm_domain r2d_domain = { + .dm = { + .name = "r2d_domain", + .power_off = normal_power_off, + .power_on = normal_power_on, + }, + .bit = PCU_DM_R2D, +}; + +static struct generic_pm_domain *zx296702_pm_domains[] = { + &vou_domain.dm, + &gpu_domain.dm, + &decppu_domain.dm, + &r2d_domain.dm, +}; + +static int zx296702_pd_probe(struct platform_device *pdev) +{ + struct genpd_onecell_data *genpd_data; + struct resource *res; + int i; + + genpd_data = devm_kzalloc(&pdev->dev, sizeof(*genpd_data), GFP_KERNEL); + if (!genpd_data) + return -ENOMEM; + + genpd_data->domains = zx296702_pm_domains; + genpd_data->num_domains = ARRAY_SIZE(zx296702_pm_domains); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "no memory resource defined\n"); + return -ENODEV; + } + + pcubase = devm_ioremap_resource(&pdev->dev, res); + if (!pcubase) { + dev_err(&pdev->dev, "ioremap fail.\n"); + return -EIO; + } + + for (i = 0; i < ARRAY_SIZE(zx296702_pm_domains); ++i) + pm_genpd_init(zx296702_pm_domains[i], NULL, false); + + of_genpd_add_provider_onecell(pdev->dev.of_node, genpd_data); + return 0; +} + +static const struct of_device_id zx296702_pm_domain_matches[] __initconst = { + { .compatible = "zte,zx296702-pcu", }, + { }, +}; + +static struct platform_driver zx296702_pd_driver __initdata = { + .driver = { + .name = "zx-powerdomain", + .owner = THIS_MODULE, + .of_match_table = zx296702_pm_domain_matches, + }, + .probe = zx296702_pd_probe, +}; + +static int __init zx296702_pd_init(void) +{ + return platform_driver_register(&zx296702_pd_driver); +} +subsys_initcall(zx296702_pd_init); diff --git a/kernel/arch/arm/mach-zx/zx296702.c b/kernel/arch/arm/mach-zx/zx296702.c new file mode 100644 index 000000000..a041e13ab --- /dev/null +++ b/kernel/arch/arm/mach-zx/zx296702.c @@ -0,0 +1,25 @@ +/* + * Copyright 2014 Linaro Ltd. + * Copyright (C) 2014 ZTE Corporation. + * + * 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 <asm/mach/arch.h> +#include <asm/mach/map.h> + +#include <linux/of_address.h> +#include <linux/of_platform.h> + +static const char *const zx296702_dt_compat[] __initconst = { + "zte,zx296702", + NULL, +}; + +DT_MACHINE_START(ZX, "ZTE ZX296702 (Device Tree)") + .dt_compat = zx296702_dt_compat, + .l2c_aux_val = 0, + .l2c_aux_mask = ~0, +MACHINE_END |