mirror of https://gitee.com/openkylin/linux.git
244 lines
6.2 KiB
C
244 lines
6.2 KiB
C
/*
|
|
* SAMSUNG EXYNOS Flattened Device Tree enabled machine
|
|
*
|
|
* Copyright (c) 2010-2014 Samsung Electronics Co., Ltd.
|
|
* http://www.samsung.com
|
|
*
|
|
* 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/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_fdt.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/irqchip.h>
|
|
#include <linux/soc/samsung/exynos-regs-pmu.h>
|
|
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/hardware/cache-l2x0.h>
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
|
|
#include <mach/map.h>
|
|
#include <plat/cpu.h>
|
|
|
|
#include "common.h"
|
|
|
|
static struct map_desc exynos4_iodesc[] __initdata = {
|
|
{
|
|
.virtual = (unsigned long)S5P_VA_COREPERI_BASE,
|
|
.pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
|
|
.length = SZ_8K,
|
|
.type = MT_DEVICE,
|
|
},
|
|
};
|
|
|
|
static struct platform_device exynos_cpuidle = {
|
|
.name = "exynos_cpuidle",
|
|
#ifdef CONFIG_ARM_EXYNOS_CPUIDLE
|
|
.dev.platform_data = exynos_enter_aftr,
|
|
#endif
|
|
.id = -1,
|
|
};
|
|
|
|
void __iomem *sysram_base_addr __ro_after_init;
|
|
void __iomem *sysram_ns_base_addr __ro_after_init;
|
|
|
|
void __init exynos_sysram_init(void)
|
|
{
|
|
struct device_node *node;
|
|
|
|
for_each_compatible_node(node, NULL, "samsung,exynos4210-sysram") {
|
|
if (!of_device_is_available(node))
|
|
continue;
|
|
sysram_base_addr = of_iomap(node, 0);
|
|
break;
|
|
}
|
|
|
|
for_each_compatible_node(node, NULL, "samsung,exynos4210-sysram-ns") {
|
|
if (!of_device_is_available(node))
|
|
continue;
|
|
sysram_ns_base_addr = of_iomap(node, 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void __init exynos_init_late(void)
|
|
{
|
|
if (of_machine_is_compatible("samsung,exynos5440"))
|
|
/* to be supported later */
|
|
return;
|
|
|
|
exynos_pm_init();
|
|
}
|
|
|
|
static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,
|
|
int depth, void *data)
|
|
{
|
|
struct map_desc iodesc;
|
|
const __be32 *reg;
|
|
int len;
|
|
|
|
if (!of_flat_dt_is_compatible(node, "samsung,exynos4210-chipid") &&
|
|
!of_flat_dt_is_compatible(node, "samsung,exynos5440-clock"))
|
|
return 0;
|
|
|
|
reg = of_get_flat_dt_prop(node, "reg", &len);
|
|
if (reg == NULL || len != (sizeof(unsigned long) * 2))
|
|
return 0;
|
|
|
|
iodesc.pfn = __phys_to_pfn(be32_to_cpu(reg[0]));
|
|
iodesc.length = be32_to_cpu(reg[1]) - 1;
|
|
iodesc.virtual = (unsigned long)S5P_VA_CHIPID;
|
|
iodesc.type = MT_DEVICE;
|
|
iotable_init(&iodesc, 1);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* exynos_map_io
|
|
*
|
|
* register the standard cpu IO areas
|
|
*/
|
|
static void __init exynos_map_io(void)
|
|
{
|
|
if (soc_is_exynos4())
|
|
iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
|
|
}
|
|
|
|
static void __init exynos_init_io(void)
|
|
{
|
|
debug_ll_io_init();
|
|
|
|
of_scan_flat_dt(exynos_fdt_map_chipid, NULL);
|
|
|
|
/* detect cpu id and rev. */
|
|
s5p_init_cpu(S5P_VA_CHIPID);
|
|
|
|
exynos_map_io();
|
|
}
|
|
|
|
/*
|
|
* Set or clear the USE_DELAYED_RESET_ASSERTION option. Used by smp code
|
|
* and suspend.
|
|
*
|
|
* This is necessary only on Exynos4 SoCs. When system is running
|
|
* USE_DELAYED_RESET_ASSERTION should be set so the ARM CLK clock down
|
|
* feature could properly detect global idle state when secondary CPU is
|
|
* powered down.
|
|
*
|
|
* However this should not be set when such system is going into suspend.
|
|
*/
|
|
void exynos_set_delayed_reset_assertion(bool enable)
|
|
{
|
|
if (of_machine_is_compatible("samsung,exynos4")) {
|
|
unsigned int tmp, core_id;
|
|
|
|
for (core_id = 0; core_id < num_possible_cpus(); core_id++) {
|
|
tmp = pmu_raw_readl(EXYNOS_ARM_CORE_OPTION(core_id));
|
|
if (enable)
|
|
tmp |= S5P_USE_DELAYED_RESET_ASSERTION;
|
|
else
|
|
tmp &= ~(S5P_USE_DELAYED_RESET_ASSERTION);
|
|
pmu_raw_writel(tmp, EXYNOS_ARM_CORE_OPTION(core_id));
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Apparently, these SoCs are not able to wake-up from suspend using
|
|
* the PMU. Too bad. Should they suddenly become capable of such a
|
|
* feat, the matches below should be moved to suspend.c.
|
|
*/
|
|
static const struct of_device_id exynos_dt_pmu_match[] = {
|
|
{ .compatible = "samsung,exynos5260-pmu" },
|
|
{ .compatible = "samsung,exynos5410-pmu" },
|
|
{ /*sentinel*/ },
|
|
};
|
|
|
|
static void exynos_map_pmu(void)
|
|
{
|
|
struct device_node *np;
|
|
|
|
np = of_find_matching_node(NULL, exynos_dt_pmu_match);
|
|
if (np)
|
|
pmu_base_addr = of_iomap(np, 0);
|
|
}
|
|
|
|
static void __init exynos_init_irq(void)
|
|
{
|
|
irqchip_init();
|
|
/*
|
|
* Since platsmp.c needs pmu base address by the time
|
|
* DT is not unflatten so we can't use DT APIs before
|
|
* init_irq
|
|
*/
|
|
exynos_map_pmu();
|
|
}
|
|
|
|
static void __init exynos_dt_machine_init(void)
|
|
{
|
|
/*
|
|
* This is called from smp_prepare_cpus if we've built for SMP, but
|
|
* we still need to set it up for PM and firmware ops if not.
|
|
*/
|
|
if (!IS_ENABLED(CONFIG_SMP))
|
|
exynos_sysram_init();
|
|
|
|
#if defined(CONFIG_SMP) && defined(CONFIG_ARM_EXYNOS_CPUIDLE)
|
|
if (of_machine_is_compatible("samsung,exynos4210") ||
|
|
of_machine_is_compatible("samsung,exynos3250"))
|
|
exynos_cpuidle.dev.platform_data = &cpuidle_coupled_exynos_data;
|
|
#endif
|
|
if (of_machine_is_compatible("samsung,exynos4210") ||
|
|
of_machine_is_compatible("samsung,exynos4212") ||
|
|
(of_machine_is_compatible("samsung,exynos4412") &&
|
|
of_machine_is_compatible("samsung,trats2")) ||
|
|
of_machine_is_compatible("samsung,exynos3250") ||
|
|
of_machine_is_compatible("samsung,exynos5250"))
|
|
platform_device_register(&exynos_cpuidle);
|
|
}
|
|
|
|
static char const *const exynos_dt_compat[] __initconst = {
|
|
"samsung,exynos3",
|
|
"samsung,exynos3250",
|
|
"samsung,exynos4",
|
|
"samsung,exynos4210",
|
|
"samsung,exynos4212",
|
|
"samsung,exynos4412",
|
|
"samsung,exynos5",
|
|
"samsung,exynos5250",
|
|
"samsung,exynos5260",
|
|
"samsung,exynos5420",
|
|
"samsung,exynos5440",
|
|
NULL
|
|
};
|
|
|
|
static void __init exynos_dt_fixup(void)
|
|
{
|
|
/*
|
|
* Some versions of uboot pass garbage entries in the memory node,
|
|
* use the old CONFIG_ARM_NR_BANKS
|
|
*/
|
|
of_fdt_limit_memory(8);
|
|
}
|
|
|
|
DT_MACHINE_START(EXYNOS_DT, "SAMSUNG EXYNOS (Flattened Device Tree)")
|
|
/* Maintainer: Thomas Abraham <thomas.abraham@linaro.org> */
|
|
/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
|
|
.l2c_aux_val = 0x3c400001,
|
|
.l2c_aux_mask = 0xc20fffff,
|
|
.smp = smp_ops(exynos_smp_ops),
|
|
.map_io = exynos_init_io,
|
|
.init_early = exynos_firmware_init,
|
|
.init_irq = exynos_init_irq,
|
|
.init_machine = exynos_dt_machine_init,
|
|
.init_late = exynos_init_late,
|
|
.dt_compat = exynos_dt_compat,
|
|
.dt_fixup = exynos_dt_fixup,
|
|
MACHINE_END
|