linux/arch/arm/plat-samsung/pm-debug.c
Tomasz Figa 2c054716a5 ARM: SAMSUNG: Restore Samsung PM Debug functionality
Due to recently merged patches and previous merge conflicts, the Samsung
PM Debug functionality no longer can be enabled. This patch fixes
incorrect dependency of SAMSUNG_PM_DEBUG on an integer symbol and adds
missing header inclusion.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2014-09-24 02:47:43 +09:00

99 lines
2.4 KiB
C

/*
* 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/serial_s3c.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);
}