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Commit 8efa50c5 authored by Arnd Bergmann's avatar Arnd Bergmann
Browse files

Merge branch 'bcm/cleanup' into next/soc 



This is a dependency for the bcm21664 support.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parents 780d2bf3 0e8b860a

arch/arm/mach-bcm/board_bcm281xx.c

+42 −41
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2012-2013 Broadcom Corporation

 * Copyright (C) 2012-2014 Broadcom Corporation

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as
@@ -11,64 +11,65 @@ 
 * GNU General Public License for more details.

 */



#include <linux/of_platform.h>

#include <linux/init.h>

#include <linux/device.h>

#include <linux/platform_device.h>

#include <linux/clocksource.h>

#include <linux/of_address.h>

#include <linux/of_platform.h>



#include <asm/mach/arch.h>

#include <asm/mach/time.h>

#include <asm/hardware/cache-l2x0.h>



#include "bcm_kona_smc.h"

#include "kona.h"



static int __init kona_l2_cache_init(void)

#define SECWDOG_OFFSET			0x00000000

#define SECWDOG_RESERVED_MASK		0xe2000000

#define SECWDOG_WD_LOAD_FLAG_MASK	0x10000000

#define SECWDOG_EN_MASK			0x08000000

#define SECWDOG_SRSTEN_MASK		0x04000000

#define SECWDOG_CLKS_SHIFT		20

#define SECWDOG_COUNT_SHIFT		0



static void bcm281xx_restart(enum reboot_mode mode, const char *cmd)

{

	if (!IS_ENABLED(CONFIG_CACHE_L2X0))

		return 0;

	uint32_t val;

	void __iomem *base;

	struct device_node *np_wdog;



	if (bcm_kona_smc_init() < 0) {

		pr_info("Kona secure API not available. Skipping L2 init\n");

		return 0;

	np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt");

	if (!np_wdog) {

		pr_emerg("Couldn't find brcm,kona-wdt\n");

		return;

	}



	bcm_kona_smc(SSAPI_ENABLE_L2_CACHE, 0, 0, 0, 0);



	/*

	 * The aux_val and aux_mask have no effect since L2 cache is already

	 * enabled.  Pass 0s for aux_val and 1s for aux_mask for default value.

	 */

	return l2x0_of_init(0, ~0);

	base = of_iomap(np_wdog, 0);

	if (!base) {

		pr_emerg("Couldn't map brcm,kona-wdt\n");

		return;

	}



static void bcm_board_setup_restart(void)

{

	struct device_node *np;

	/* Enable watchdog with short timeout (244us). */

	val = readl(base + SECWDOG_OFFSET);

	val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK;

	val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK |

		(0x15 << SECWDOG_CLKS_SHIFT) |

		(0x8 << SECWDOG_COUNT_SHIFT);

	writel(val, base + SECWDOG_OFFSET);



	np = of_find_compatible_node(NULL, NULL, "brcm,bcm11351");

	if (np) {

		if (of_device_is_available(np))

			bcm_kona_setup_restart();

		of_node_put(np);

	}

	/* Restart setup for other boards goes here */

	/* Wait for reset */

	while (1);

}



static void __init board_init(void)

static void __init bcm281xx_init(void)

{

	of_platform_populate(NULL, of_default_bus_match_table, NULL,

		&platform_bus);



	bcm_board_setup_restart();

	kona_l2_cache_init();

}



static const char * const bcm11351_dt_compat[] = { "brcm,bcm11351", NULL, };

static const char * const bcm281xx_dt_compat[] = {

	"brcm,bcm11351",	/* Have to use the first number upstreamed */

	NULL,

};



DT_MACHINE_START(BCM11351_DT, "BCM281xx Broadcom Application Processor")

	.init_machine = board_init,

	.restart = bcm_kona_restart,

	.dt_compat = bcm11351_dt_compat,

DT_MACHINE_START(BCM281XX_DT, "BCM281xx Broadcom Application Processor")

	.init_machine = bcm281xx_init,

	.restart = bcm281xx_restart,

	.dt_compat = bcm281xx_dt_compat,

MACHINE_END

arch/arm/mach-bcm/kona.c

+21 −43
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2013 Broadcom Corporation

 * Copyright (C) 2012-2014 Broadcom Corporation

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as
@@ -11,55 +11,33 @@ 
 * GNU General Public License for more details.

 */



#include <linux/of_address.h>

#include <asm/io.h>

#include <linux/of_platform.h>

#include <asm/hardware/cache-l2x0.h>



#include "bcm_kona_smc.h"

#include "kona.h"



static void __iomem *watchdog_base;



void bcm_kona_setup_restart(void)

void __init kona_l2_cache_init(void)

{

	struct device_node *np_wdog;

	int ret;



	/*

	 * The assumption is that whoever calls bcm_kona_setup_restart()

	 * also needs a Kona Watchdog Timer entry in Device Tree, i.e. we

	 * report an error if the DT entry is missing.

	 */

	np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt");

	if (!np_wdog) {

		pr_err("brcm,kona-wdt not found in DT, reboot disabled\n");

	if (!IS_ENABLED(CONFIG_CACHE_L2X0))

		return;

	}

	watchdog_base = of_iomap(np_wdog, 0);

	WARN(!watchdog_base, "failed to map watchdog base");

	of_node_put(np_wdog);

}



#define SECWDOG_OFFSET			0x00000000

#define SECWDOG_RESERVED_MASK		0xE2000000

#define SECWDOG_WD_LOAD_FLAG_MASK	0x10000000

#define SECWDOG_EN_MASK			0x08000000

#define SECWDOG_SRSTEN_MASK		0x04000000

#define SECWDOG_CLKS_SHIFT		20

#define SECWDOG_LOCK_SHIFT		0



void bcm_kona_restart(enum reboot_mode mode, const char *cmd)

{

	uint32_t val;



	if (!watchdog_base)

		panic("Watchdog not mapped. Reboot failed.\n");

	ret = bcm_kona_smc_init();

	if (ret) {

		pr_info("Secure API not available (%d). Skipping L2 init.\n",

			ret);

		return;

	}



	/* Enable watchdog2 with very short timeout. */

	val = readl(watchdog_base + SECWDOG_OFFSET);

	val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK;

	val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK |

		(0x8 << SECWDOG_CLKS_SHIFT) |

		(0x8 << SECWDOG_LOCK_SHIFT);

	writel(val, watchdog_base + SECWDOG_OFFSET);

	bcm_kona_smc(SSAPI_ENABLE_L2_CACHE, 0, 0, 0, 0);



	while (1)

		;

	/*

	 * The aux_val and aux_mask have no effect since L2 cache is already

	 * enabled.  Pass 0s for aux_val and 1s for aux_mask for default value.

	 */

	ret = l2x0_of_init(0, ~0);

	if (ret)

		pr_err("Couldn't enable L2 cache: %d\n", ret);

}

arch/arm/mach-bcm/kona.h

+2 −5
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2013 Broadcom Corporation

 * Copyright (C) 2012-2014 Broadcom Corporation

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as
@@ -11,7 +11,4 @@ 
 * GNU General Public License for more details.

 */



#include <linux/reboot.h>



void bcm_kona_setup_restart(void);

void bcm_kona_restart(enum reboot_mode mode, const char *cmd);
 
void __init kona_l2_cache_init(void);