Commit 72551f6c authored by Tomasz Figa's avatar Tomasz Figa Committed by Kukjin Kim
Browse files

ARM: SAMSUNG: Move Samsung PM debug code into separate file 



Not all Samsung SoC platforms are going to use the legacy Samsung PM
code enabled by CONFIG_SAMSUNG_PM_DEBUG. To allow using Samsung PM debug
helpers on such platforms, related code is moved to separate file and
a plat/pm-common.h header is added to separate legacy and generic code.

Signed-off-by: default avatarTomasz Figa <t.figa@samsung.com>
Acked-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent d38688a6

arch/arm/plat-samsung/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -50,6 +50,7 @@ obj-$(CONFIG_SAMSUNG_DMADEV) += dma-ops.o 
obj-$(CONFIG_SAMSUNG_PM)	+= pm.o

obj-$(CONFIG_SAMSUNG_PM_GPIO)	+= pm-gpio.o

obj-$(CONFIG_SAMSUNG_PM_CHECK)	+= pm-check.o

obj-$(CONFIG_SAMSUNG_PM_DEBUG)	+= pm-debug.o



obj-$(CONFIG_SAMSUNG_WAKEMASK)	+= wakeup-mask.o

obj-$(CONFIG_SAMSUNG_WDT_RESET)	+= watchdog-reset.o

arch/arm/plat-samsung/include/plat/pm-common.h

0 → 100644
+70 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2013 Samsung Electronics Co., Ltd.

 *	Tomasz Figa <t.figa@samsung.com>

 * Copyright (c) 2004 Simtec Electronics

 *	http://armlinux.simtec.co.uk/

 *	Written by Ben Dooks, <ben@simtec.co.uk>

 *

 * 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 __PLAT_SAMSUNG_PM_COMMON_H

#define __PLAT_SAMSUNG_PM_COMMON_H __FILE__



/* PM debug functions */



/**

 * struct pm_uart_save - save block for core UART

 * @ulcon: Save value for S3C2410_ULCON

 * @ucon: Save value for S3C2410_UCON

 * @ufcon: Save value for S3C2410_UFCON

 * @umcon: Save value for S3C2410_UMCON

 * @ubrdiv: Save value for S3C2410_UBRDIV

 *

 * Save block for UART registers to be held over sleep and restored if they

 * are needed (say by debug).

*/

struct pm_uart_save {

	u32	ulcon;

	u32	ucon;

	u32	ufcon;

	u32	umcon;

	u32	ubrdiv;

	u32	udivslot;

};



#ifdef CONFIG_SAMSUNG_PM_DEBUG

/**

 * s3c_pm_dbg() - low level debug function for use in suspend/resume.

 * @msg: The message to print.

 *

 * This function is used mainly to debug the resume process before the system

 * can rely on printk/console output. It uses the low-level debugging output

 * routine printascii() to do its work.

 */

extern void s3c_pm_dbg(const char *msg, ...);



/**

 * s3c_pm_debug_init() - suspend/resume low level debug initialization.

 * @base: Virtual base of UART to use for suspend/resume debugging.

 *

 * This function needs to be called before S3C_PMDBG() can be used, to set up

 * UART port base address and configuration.

 */

extern void s3c_pm_debug_init(void);



#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)



extern void s3c_pm_save_uarts(void);

extern void s3c_pm_restore_uarts(void);

#else

#define S3C_PMDBG(fmt...) pr_debug(fmt)

#define s3c_pm_debug_init() do { } while (0)



static inline void s3c_pm_save_uarts(void) { }

static inline void s3c_pm_restore_uarts(void) { }

#endif



#endif

arch/arm/plat-samsung/include/plat/pm.h

+1 −38
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
*/



#include <linux/irq.h>

#include <plat/pm-common.h>



struct device;
@@ -76,26 +77,6 @@ struct sleep_save { 
#define SAVE_ITEM(x) \

	{ .reg = (x) }



/**

 * struct pm_uart_save - save block for core UART

 * @ulcon: Save value for S3C2410_ULCON

 * @ucon: Save value for S3C2410_UCON

 * @ufcon: Save value for S3C2410_UFCON

 * @umcon: Save value for S3C2410_UMCON

 * @ubrdiv: Save value for S3C2410_UBRDIV

 *

 * Save block for UART registers to be held over sleep and restored if they

 * are needed (say by debug).

*/

struct pm_uart_save {

	u32	ulcon;

	u32	ucon;

	u32	ufcon;

	u32	umcon;

	u32	ubrdiv;

	u32	udivslot;

};



/* helper functions to save/restore lists of registers. */



extern void s3c_pm_do_save(struct sleep_save *ptr, int count);
@@ -112,24 +93,6 @@ extern void s3c_cpu_resume(void); 
#define s3c_cpu_resume NULL

#endif



/* PM debug functions */



#ifdef CONFIG_SAMSUNG_PM_DEBUG

/**

 * s3c_pm_dbg() - low level debug function for use in suspend/resume.

 * @msg: The message to print.

 *

 * This function is used mainly to debug the resume process before the system

 * can rely on printk/console output. It uses the low-level debugging output

 * routine printascii() to do its work.

 */

extern void s3c_pm_dbg(const char *msg, ...);



#define S3C_PMDBG(fmt...) s3c_pm_dbg(fmt)

#else

#define S3C_PMDBG(fmt...) printk(KERN_DEBUG fmt)

#endif



#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK

/**

 * s3c_pm_debug_smdkled() - Debug PM suspend/resume via SMDK Board LEDs

arch/arm/plat-samsung/pm-debug.c

0 → 100644
+97 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2013 Samsung Electronics Co., Ltd.

 *	Tomasz Figa <t.figa@samsung.com>

 * Copyright (C) 2008 Openmoko, Inc.

 * Copyright (C) 2004-2008 Simtec Electronics

 *	Ben Dooks <ben@simtec.co.uk>

 *	http://armlinux.simtec.co.uk/

 *

 * Samsung common power management (suspend to RAM) debug support

 *

 * 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/serial_core.h>

#include <linux/io.h>



#include <asm/mach/map.h>



#include <plat/cpu.h>

#include <plat/pm-common.h>



#ifdef CONFIG_SAMSUNG_ATAGS

#include <mach/pm-core.h>

#else

static inline void s3c_pm_debug_init_uart(void) {}

static inline void s3c_pm_arch_update_uart(void __iomem *regs,

					   struct pm_uart_save *save) {}

#endif



static struct pm_uart_save uart_save;



extern void printascii(const char *);



void s3c_pm_dbg(const char *fmt, ...)

{

	va_list va;

	char buff[256];



	va_start(va, fmt);

	vsnprintf(buff, sizeof(buff), fmt, va);

	va_end(va);



	printascii(buff);

}



void s3c_pm_debug_init(void)

{

	/* restart uart clocks so we can use them to output */

	s3c_pm_debug_init_uart();

}



static inline void __iomem *s3c_pm_uart_base(void)

{

	unsigned long paddr;

	unsigned long vaddr;



	debug_ll_addr(&paddr, &vaddr);



	return (void __iomem *)vaddr;

}



void s3c_pm_save_uarts(void)

{

	void __iomem *regs = s3c_pm_uart_base();

	struct pm_uart_save *save = &uart_save;



	save->ulcon = __raw_readl(regs + S3C2410_ULCON);

	save->ucon = __raw_readl(regs + S3C2410_UCON);

	save->ufcon = __raw_readl(regs + S3C2410_UFCON);

	save->umcon = __raw_readl(regs + S3C2410_UMCON);

	save->ubrdiv = __raw_readl(regs + S3C2410_UBRDIV);



	if (!soc_is_s3c2410())

		save->udivslot = __raw_readl(regs + S3C2443_DIVSLOT);



	S3C_PMDBG("UART[%p]: ULCON=%04x, UCON=%04x, UFCON=%04x, UBRDIV=%04x\n",

		  regs, save->ulcon, save->ucon, save->ufcon, save->ubrdiv);

}



void s3c_pm_restore_uarts(void)

{

	void __iomem *regs = s3c_pm_uart_base();

	struct pm_uart_save *save = &uart_save;



	s3c_pm_arch_update_uart(regs, save);



	__raw_writel(save->ulcon, regs + S3C2410_ULCON);

	__raw_writel(save->ucon,  regs + S3C2410_UCON);

	__raw_writel(save->ufcon, regs + S3C2410_UFCON);

	__raw_writel(save->umcon, regs + S3C2410_UMCON);

	__raw_writel(save->ubrdiv, regs + S3C2410_UBRDIV);



	if (!soc_is_s3c2410())

		__raw_writel(save->udivslot, regs + S3C2443_DIVSLOT);

}

arch/arm/plat-samsung/pm.c

+0 −84
Original line number Diff line number Diff line
@@ -17,16 +17,12 @@ 
#include <linux/errno.h>

#include <linux/delay.h>

#include <linux/of.h>

#include <linux/serial_core.h>

#include <linux/serial_s3c.h>

#include <linux/io.h>



#include <asm/cacheflush.h>

#include <asm/mach/map.h>

#include <asm/suspend.h>



#include <plat/cpu.h>



#ifdef CONFIG_SAMSUNG_ATAGS

#include <mach/hardware.h>

#include <mach/map.h>
@@ -46,86 +42,6 @@ 


unsigned long s3c_pm_flags;



/* Debug code:

 *

 * This code supports debug output to the low level UARTs for use on

 * resume before the console layer is available.

*/



#ifdef CONFIG_SAMSUNG_PM_DEBUG

extern void printascii(const char *);



void s3c_pm_dbg(const char *fmt, ...)

{

	va_list va;

	char buff[256];



	va_start(va, fmt);

	vsnprintf(buff, sizeof(buff), fmt, va);

	va_end(va);



	printascii(buff);

}



static inline void s3c_pm_debug_init(void)

{

	/* restart uart clocks so we can use them to output */

	s3c_pm_debug_init_uart();

}



static struct pm_uart_save uart_save;



static inline void __iomem *s3c_pm_uart_base(void)

{

	unsigned long paddr;

	unsigned long vaddr;



	debug_ll_addr(&paddr, &vaddr);



	return (void __iomem *)vaddr;

}



static void s3c_pm_save_uarts(void)

{

	void __iomem *regs = s3c_pm_uart_base();

	struct pm_uart_save *save = &uart_save;



	save->ulcon = __raw_readl(regs + S3C2410_ULCON);

	save->ucon = __raw_readl(regs + S3C2410_UCON);

	save->ufcon = __raw_readl(regs + S3C2410_UFCON);

	save->umcon = __raw_readl(regs + S3C2410_UMCON);

	save->ubrdiv = __raw_readl(regs + S3C2410_UBRDIV);



	if (!soc_is_s3c2410())

		save->udivslot = __raw_readl(regs + S3C2443_DIVSLOT);



	S3C_PMDBG("UART[%p]: ULCON=%04x, UCON=%04x, UFCON=%04x, UBRDIV=%04x\n",

		  regs, save->ulcon, save->ucon, save->ufcon, save->ubrdiv);

}



static void s3c_pm_restore_uarts(void)

{

	void __iomem *regs = s3c_pm_uart_base();

	struct pm_uart_save *save = &uart_save;



	s3c_pm_arch_update_uart(regs, save);



	__raw_writel(save->ulcon, regs + S3C2410_ULCON);

	__raw_writel(save->ucon,  regs + S3C2410_UCON);

	__raw_writel(save->ufcon, regs + S3C2410_UFCON);

	__raw_writel(save->umcon, regs + S3C2410_UMCON);

	__raw_writel(save->ubrdiv, regs + S3C2410_UBRDIV);



	if (!soc_is_s3c2410())

		__raw_writel(save->udivslot, regs + S3C2443_DIVSLOT);

}

#else

#define s3c_pm_debug_init() do { } while (0)



static void s3c_pm_save_uarts(void) { }

static void s3c_pm_restore_uarts(void) { }

#endif



/* The IRQ ext-int code goes here, it is too small to currently bother

 * with its own file. */

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