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: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 97 insertions, 0 deletions

diff --git a/arch/arm/plat-samsung/pm-debug.c b/arch/arm/plat-samsung/pm-debug.c
new file mode 100644
index 000000000000..8f19f66388dd
--- /dev/null
+++ b/arch/arm/plat-samsung/pm-debug.c
@@ -0,0 +1,97 @@
+/*
+ * 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);
+}