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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/arm/plat-samsung/pm-debug.c
2 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
3 * Tomasz Figa <t.figa@samsung.com>
4 * Copyright (C) 2008 Openmoko, Inc.
5 * Copyright (C) 2004-2008 Simtec Electronics
6 * Ben Dooks <ben@simtec.co.uk>
7 * http://armlinux.simtec.co.uk/
9 * Samsung common power management (suspend to RAM) debug support
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/serial_core.h>
17 #include <linux/serial_s3c.h>
20 #include <asm/mach/map.h>
23 #include <plat/pm-common.h>
25 #ifdef CONFIG_SAMSUNG_ATAGS
26 #include <mach/pm-core.h>
28 static inline void s3c_pm_debug_init_uart(void) {}
29 static inline void s3c_pm_arch_update_uart(void __iomem
*regs
,
30 struct pm_uart_save
*save
) {}
33 static struct pm_uart_save uart_save
;
35 extern void printascii(const char *);
37 void s3c_pm_dbg(const char *fmt
, ...)
43 vsnprintf(buff
, sizeof(buff
), fmt
, va
);
49 void s3c_pm_debug_init(void)
51 /* restart uart clocks so we can use them to output */
52 s3c_pm_debug_init_uart();
55 static inline void __iomem
*s3c_pm_uart_base(void)
60 debug_ll_addr(&paddr
, &vaddr
);
62 return (void __iomem
*)vaddr
;
65 void s3c_pm_save_uarts(void)
67 void __iomem
*regs
= s3c_pm_uart_base();
68 struct pm_uart_save
*save
= &uart_save
;
70 save
->ulcon
= __raw_readl(regs
+ S3C2410_ULCON
);
71 save
->ucon
= __raw_readl(regs
+ S3C2410_UCON
);
72 save
->ufcon
= __raw_readl(regs
+ S3C2410_UFCON
);
73 save
->umcon
= __raw_readl(regs
+ S3C2410_UMCON
);
74 save
->ubrdiv
= __raw_readl(regs
+ S3C2410_UBRDIV
);
76 if (!soc_is_s3c2410())
77 save
->udivslot
= __raw_readl(regs
+ S3C2443_DIVSLOT
);
79 S3C_PMDBG("UART[%p]: ULCON=%04x, UCON=%04x, UFCON=%04x, UBRDIV=%04x\n",
80 regs
, save
->ulcon
, save
->ucon
, save
->ufcon
, save
->ubrdiv
);
83 void s3c_pm_restore_uarts(void)
85 void __iomem
*regs
= s3c_pm_uart_base();
86 struct pm_uart_save
*save
= &uart_save
;
88 s3c_pm_arch_update_uart(regs
, save
);
90 __raw_writel(save
->ulcon
, regs
+ S3C2410_ULCON
);
91 __raw_writel(save
->ucon
, regs
+ S3C2410_UCON
);
92 __raw_writel(save
->ufcon
, regs
+ S3C2410_UFCON
);
93 __raw_writel(save
->umcon
, regs
+ S3C2410_UMCON
);
94 __raw_writel(save
->ubrdiv
, regs
+ S3C2410_UBRDIV
);
96 if (!soc_is_s3c2410())
97 __raw_writel(save
->udivslot
, regs
+ S3C2443_DIVSLOT
);