Release 4.11 arch/arm/mach-exynos/exynos.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;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Olof Johansson
71
100.00%
1
100.00%
Total
71
100.00%
1
100.00%



static void __init exynos_init_late(void)
{
	if (of_machine_is_compatible("samsung,exynos5440"))
		/* to be supported later */
		return;

	exynos_pm_init();
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Kukjin Kim
9
42.86%
1
25.00%
Shawn Guo
8
38.10%
1
25.00%
Tomasz Figa
3
14.29%
1
25.00%
Pankaj Dubey
1
4.76%
1
25.00%
Total
21
100.00%
4
100.00%



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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Abraham
108
74.48%
1
14.29%
Kukjin Kim
19
13.10%
2
28.57%
Douglas Anderson
15
10.34%
1
14.29%
Sachin Kamat
1
0.69%
1
14.29%
Rob Herring
1
0.69%
1
14.29%
Arnd Bergmann
1
0.69%
1
14.29%
Total
145
100.00%
7
100.00%

/*
 * 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));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Sachin Kamat
9
37.50%
2
33.33%
Kukjin Kim
8
33.33%
1
16.67%
Thomas Abraham
5
20.83%
1
16.67%
Arnd Bergmann
1
4.17%
1
16.67%
Douglas Anderson
1
4.17%
1
16.67%
Total
24
100.00%
6
100.00%



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();
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Sachin Kamat
13
46.43%
1
20.00%
Kukjin Kim
11
39.29%
2
40.00%
Tomasz Figa
3
10.71%
1
20.00%
Pankaj Dubey
1
3.57%
1
20.00%
Total
28
100.00%
5
100.00%

/*
 * 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));
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Krzysztof Kozlowski
75
100.00%
2
100.00%
Total
75
100.00%
2
100.00%

/*
 * 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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Pankaj Dubey
35
100.00%
1
100.00%
Total
35
100.00%
1
100.00%



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();
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Pankaj Dubey
16
100.00%
1
100.00%
Total
16
100.00%
1
100.00%



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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Bartlomiej Zolnierkiewicz
56
58.95%
5
41.67%
Pankaj Dubey
11
11.58%
1
8.33%
Olof Johansson
11
11.58%
1
8.33%
Kukjin Kim
7
7.37%
2
16.67%
Chander Kashyap
6
6.32%
1
8.33%
Sachin Kamat
3
3.16%
1
8.33%
Abhilash Kesavan
1
1.05%
1
8.33%
Total
95
100.00%
12
100.00%


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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Laura Abbott
15
100.00%
1
100.00%
Total
15
100.00%
1
100.00%

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
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Thomas Abraham
117
15.04%
2
4.08%
Kukjin Kim
109
14.01%
4
8.16%
Sachin Kamat
103
13.24%
4
8.16%
Pankaj Dubey
95
12.21%
6
12.24%
Olof Johansson
92
11.83%
1
2.04%
Bartlomiej Zolnierkiewicz
82
10.54%
7
14.29%
Krzysztof Kozlowski
78
10.03%
3
6.12%
Laura Abbott
19
2.44%
1
2.04%
Douglas Anderson
16
2.06%
2
4.08%
Russell King
10
1.29%
1
2.04%
Shawn Guo
8
1.03%
1
2.04%
Vikas Sajjan
7
0.90%
1
2.04%
Daniel Lezcano
7
0.90%
1
2.04%
Chander Kashyap
6
0.77%
1
2.04%
Tomasz Figa
6
0.77%
2
4.08%
Arnd Bergmann
5
0.64%
3
6.12%
Chanwoo Choi
4
0.51%
1
2.04%
Rob Herring
4
0.51%
3
6.12%
Andreas Färber
4
0.51%
1
2.04%
Ben Dooks
3
0.39%
1
2.04%
Marc Zyngier
1
0.13%
1
2.04%
Uwe Kleine-König
1
0.13%
1
2.04%
Abhilash Kesavan
1
0.13%
1
2.04%
Total
778
100.00%
49
100.00%
Directory: arch/arm/mach-exynos

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.