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linux/arch/arm/mach-exynos/exynos.c
Sachin Kamat cbf08b9ebd ARM: EXYNOS: Consolidate exynos4 and exynos5 machine files 
Since there is very little difference between these two files,
they can be easily combined into one with necessary SoC checks.
While at it also merge the common.c file into this as it does
not have any other users.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-03-21 02:14:39 +09:00

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/*
* 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/kernel.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_fdt.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <asm/cacheflush.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/memory.h>
#include <plat/cpu.h>
#include <plat/regs-serial.h>
#include "common.h"
#include "mfc.h"
#include "regs-pmu.h"
#define L2_AUX_VAL 0x7C470001
#define L2_AUX_MASK 0xC200ffff
static struct map_desc exynos4_iodesc[] __initdata = {
{
.virtual = (unsigned long)S3C_VA_SYS,
.pfn = __phys_to_pfn(EXYNOS4_PA_SYSCON),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_TIMER,
.pfn = __phys_to_pfn(EXYNOS4_PA_TIMER),
.length = SZ_16K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_WATCHDOG,
.pfn = __phys_to_pfn(EXYNOS4_PA_WATCHDOG),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_SROMC,
.pfn = __phys_to_pfn(EXYNOS4_PA_SROMC),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_SYSTIMER,
.pfn = __phys_to_pfn(EXYNOS4_PA_SYSTIMER),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_PMU,
.pfn = __phys_to_pfn(EXYNOS4_PA_PMU),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_COMBINER_BASE,
.pfn = __phys_to_pfn(EXYNOS4_PA_COMBINER),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_GIC_CPU,
.pfn = __phys_to_pfn(EXYNOS4_PA_GIC_CPU),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_GIC_DIST,
.pfn = __phys_to_pfn(EXYNOS4_PA_GIC_DIST),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_CMU,
.pfn = __phys_to_pfn(EXYNOS4_PA_CMU),
.length = SZ_128K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_COREPERI_BASE,
.pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
.length = SZ_8K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_L2CC,
.pfn = __phys_to_pfn(EXYNOS4_PA_L2CC),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_DMC0,
.pfn = __phys_to_pfn(EXYNOS4_PA_DMC0),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_DMC1,
.pfn = __phys_to_pfn(EXYNOS4_PA_DMC1),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_USB_HSPHY,
.pfn = __phys_to_pfn(EXYNOS4_PA_HSPHY),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static struct map_desc exynos4_iodesc0[] __initdata = {
{
.virtual = (unsigned long)S5P_VA_SYSRAM,
.pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM0),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static struct map_desc exynos4_iodesc1[] __initdata = {
{
.virtual = (unsigned long)S5P_VA_SYSRAM,
.pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM1),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static struct map_desc exynos4210_iodesc[] __initdata = {
{
.virtual = (unsigned long)S5P_VA_SYSRAM_NS,
.pfn = __phys_to_pfn(EXYNOS4210_PA_SYSRAM_NS),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static struct map_desc exynos4x12_iodesc[] __initdata = {
{
.virtual = (unsigned long)S5P_VA_SYSRAM_NS,
.pfn = __phys_to_pfn(EXYNOS4x12_PA_SYSRAM_NS),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static struct map_desc exynos5250_iodesc[] __initdata = {
{
.virtual = (unsigned long)S5P_VA_SYSRAM_NS,
.pfn = __phys_to_pfn(EXYNOS5250_PA_SYSRAM_NS),
.length = SZ_4K,
.type = MT_DEVICE,
},
};
static struct map_desc exynos5_iodesc[] __initdata = {
{
.virtual = (unsigned long)S3C_VA_SYS,
.pfn = __phys_to_pfn(EXYNOS5_PA_SYSCON),
.length = SZ_64K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_TIMER,
.pfn = __phys_to_pfn(EXYNOS5_PA_TIMER),
.length = SZ_16K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S3C_VA_WATCHDOG,
.pfn = __phys_to_pfn(EXYNOS5_PA_WATCHDOG),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_SROMC,
.pfn = __phys_to_pfn(EXYNOS5_PA_SROMC),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_SYSRAM,
.pfn = __phys_to_pfn(EXYNOS5_PA_SYSRAM),
.length = SZ_4K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_CMU,
.pfn = __phys_to_pfn(EXYNOS5_PA_CMU),
.length = 144 * SZ_1K,
.type = MT_DEVICE,
}, {
.virtual = (unsigned long)S5P_VA_PMU,
.pfn = __phys_to_pfn(EXYNOS5_PA_PMU),
.length = SZ_64K,
.type = MT_DEVICE,
},
};
void exynos_restart(enum reboot_mode mode, const char *cmd)
{
struct device_node *np;
u32 val = 0x1;
void __iomem *addr = EXYNOS_SWRESET;
if (of_machine_is_compatible("samsung,exynos5440")) {
u32 status;
np = of_find_compatible_node(NULL, NULL, "samsung,exynos5440-clock");
addr = of_iomap(np, 0) + 0xbc;
status = __raw_readl(addr);
addr = of_iomap(np, 0) + 0xcc;
val = __raw_readl(addr);
val = (val & 0xffff0000) | (status & 0xffff);
}
__raw_writel(val, addr);
}
static struct platform_device exynos_cpuidle = {
.name = "exynos_cpuidle",
.id = -1,
};
void __init exynos_cpuidle_init(void)
{
platform_device_register(&exynos_cpuidle);
}
void __init exynos_cpufreq_init(void)
{
platform_device_register_simple("exynos-cpufreq", -1, NULL, 0);
}
void __init exynos_init_late(void)
{
if (of_machine_is_compatible("samsung,exynos5440"))
/* to be supported later */
return;
pm_genpd_poweroff_unused();
}
static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,
int depth, void *data)
{
struct map_desc iodesc;
__be32 *reg;
unsigned long 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));
if (soc_is_exynos5())
iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
if (soc_is_exynos4210()) {
if (samsung_rev() == EXYNOS4210_REV_0)
iotable_init(exynos4_iodesc0,
ARRAY_SIZE(exynos4_iodesc0));
else
iotable_init(exynos4_iodesc1,
ARRAY_SIZE(exynos4_iodesc1));
iotable_init(exynos4210_iodesc, ARRAY_SIZE(exynos4210_iodesc));
}
if (soc_is_exynos4212() || soc_is_exynos4412())
iotable_init(exynos4x12_iodesc, ARRAY_SIZE(exynos4x12_iodesc));
if (soc_is_exynos5250())
iotable_init(exynos5250_iodesc, ARRAY_SIZE(exynos5250_iodesc));
}
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();
}
struct bus_type exynos_subsys = {
.name = "exynos-core",
.dev_name = "exynos-core",
};
static int __init exynos_core_init(void)
{
return subsys_system_register(&exynos_subsys, NULL);
}
core_initcall(exynos_core_init);
static int __init exynos4_l2x0_cache_init(void)
{
int ret;
ret = l2x0_of_init(L2_AUX_VAL, L2_AUX_MASK);
if (ret)
return ret;
l2x0_regs_phys = virt_to_phys(&l2x0_saved_regs);
clean_dcache_area(&l2x0_regs_phys, sizeof(unsigned long));
return 0;
}
early_initcall(exynos4_l2x0_cache_init);
static void __init exynos_dt_machine_init(void)
{
struct device_node *i2c_np;
const char *i2c_compat = "samsung,s3c2440-i2c";
unsigned int tmp;
int id;
/*
* Exynos5's legacy i2c controller and new high speed i2c
* controller have muxed interrupt sources. By default the
* interrupts for 4-channel HS-I2C controller are enabled.
* If node for first four channels of legacy i2c controller
* are available then re-configure the interrupts via the
* system register.
*/
if (soc_is_exynos5()) {
for_each_compatible_node(i2c_np, NULL, i2c_compat) {
if (of_device_is_available(i2c_np)) {
id = of_alias_get_id(i2c_np, "i2c");
if (id < 4) {
tmp = readl(EXYNOS5_SYS_I2C_CFG);
writel(tmp & ~(0x1 << id),
EXYNOS5_SYS_I2C_CFG);
}
}
}
}
exynos_cpuidle_init();
exynos_cpufreq_init();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
static char const *exynos_dt_compat[] __initconst = {
"samsung,exynos4210",
"samsung,exynos4212",
"samsung,exynos4412",
"samsung,exynos5250",
"samsung,exynos5420",
"samsung,exynos5440",
NULL
};
static void __init exynos_reserve(void)
{
#ifdef CONFIG_S5P_DEV_MFC
int i;
char *mfc_mem[] = {
"samsung,mfc-v5",
"samsung,mfc-v6",
"samsung,mfc-v7",
};
for (i = 0; i < ARRAY_SIZE(mfc_mem); i++)
if (of_scan_flat_dt(s5p_fdt_alloc_mfc_mem, mfc_mem[i]))
break;
#endif
}
DT_MACHINE_START(EXYNOS_DT, "SAMSUNG EXYNOS (Flattened Device Tree)")
/* Maintainer: Thomas Abraham <thomas.abraham@linaro.org> */
/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
.smp = smp_ops(exynos_smp_ops),
.map_io = exynos_init_io,
.init_early = exynos_firmware_init,
.init_machine = exynos_dt_machine_init,
.init_late = exynos_init_late,
.dt_compat = exynos_dt_compat,
.restart = exynos_restart,
.reserve = exynos_reserve,
MACHINE_END
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