linux/arch/arm/mach-shmobile/pm-r8a7790.c
Olof Johansson e87d10b29f Second Round of Renesas ARM Based SoC Updates for v3.17
* Suspend on non-SMP update for r8a7790
 * Move r8a7791.h out of mach directory.
   This is part of a multi-stage effort to move headers
   out of that directory.
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Merge tag 'renesas-soc2-for-v3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/soc

Merge "Second Round of Renesas ARM Based SoC Updates for v3.17" from Simon
Horman:

* Suspend on non-SMP update for r8a7790
* Move r8a7791.h out of mach directory.
  This is part of a multi-stage effort to move headers
  out of that directory.

* tag 'renesas-soc2-for-v3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: Allow r8a7791 to build non-SMP APMU code
  ARM: shmobile: Move r8a7791 reset code to pm-r8a7791.c
  ARM: shmobile: Allow r8a7790 to build non-SMP APMU code
  ARM: shmobile: Move r8a7790 reset code to pm-r8a7790.c
  ARM: shmobile: Use __init for APMU suspend init function
  ARM: shmobile: Adjust APMU code to build for non-SMP
  ARM: shmobile: Allow use of boot code for non-SMP case
  ARM: shmobile: Move r8a7791.h

Signed-off-by: Olof Johansson <olof@lixom.net>
2014-07-12 09:44:52 -07:00

83 lines
1.9 KiB
C

/*
* r8a7790 Power management support
*
* Copyright (C) 2013 Renesas Electronics Corporation
* Copyright (C) 2011 Renesas Solutions Corp.
* Copyright (C) 2011 Magnus Damm
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/kernel.h>
#include <linux/smp.h>
#include <asm/io.h>
#include "common.h"
#include "pm-rcar.h"
#include "r8a7790.h"
/* RST */
#define RST 0xe6160000
#define CA15BAR 0x0020
#define CA7BAR 0x0030
#define CA15RESCNT 0x0040
#define CA7RESCNT 0x0044
/* On-chip RAM */
#define MERAM 0xe8080000
/* SYSC */
#define SYSCIER 0x0c
#define SYSCIMR 0x10
#if defined(CONFIG_SMP)
static void __init r8a7790_sysc_init(void)
{
void __iomem *base = rcar_sysc_init(0xe6180000);
/* enable all interrupt sources, but do not use interrupt handler */
iowrite32(0x0131000e, base + SYSCIER);
iowrite32(0, base + SYSCIMR);
}
#else /* CONFIG_SMP */
static inline void r8a7790_sysc_init(void) {}
#endif /* CONFIG_SMP */
void __init r8a7790_pm_init(void)
{
void __iomem *p;
u32 bar;
static int once;
if (once++)
return;
/* MERAM for jump stub, because BAR requires 256KB aligned address */
p = ioremap_nocache(MERAM, shmobile_boot_size);
memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
iounmap(p);
/* setup reset vectors */
p = ioremap_nocache(RST, 0x63);
bar = (MERAM >> 8) & 0xfffffc00;
writel_relaxed(bar, p + CA15BAR);
writel_relaxed(bar, p + CA7BAR);
writel_relaxed(bar | 0x10, p + CA15BAR);
writel_relaxed(bar | 0x10, p + CA7BAR);
/* de-assert reset for all CPUs */
writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) | 0xa5a50000,
p + CA15RESCNT);
writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) | 0x5a5a0000,
p + CA7RESCNT);
iounmap(p);
r8a7790_sysc_init();
shmobile_smp_apmu_suspend_init();
}