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authorGaku Inami <gaku.inami.xw@bp.renesas.com>2015-03-16 08:48:43 +0300
committerSimon Horman <horms+renesas@verge.net.au>2015-03-17 02:05:13 +0300
commita8caad66904a7923c05fc4a137110085533ef00c (patch)
tree1ae9e73c55db36c2a62118eee8fe1069a8d1ceb5 /arch/arm/mach-shmobile/pm-rcar-gen2.c
parent78420b5dca18f2034f18925f5608cda2c960c3f3 (diff)
downloadlinux-a8caad66904a7923c05fc4a137110085533ef00c.tar.xz
ARM: shmobile: Consolidate the pm code for R-Car Gen2
The pm code for R-Car Gen2 is scatterd in each SoC. These files (pm-r8a7790.c/pm-r8a7791.c) have some overlap code. This change consolidate the pm code for R-Car Gen2 into one. Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'arch/arm/mach-shmobile/pm-rcar-gen2.c')
-rw-r--r--arch/arm/mach-shmobile/pm-rcar-gen2.c115
1 files changed, 115 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/pm-rcar-gen2.c b/arch/arm/mach-shmobile/pm-rcar-gen2.c
new file mode 100644
index 000000000000..6815781ad116
--- /dev/null
+++ b/arch/arm/mach-shmobile/pm-rcar-gen2.c
@@ -0,0 +1,115 @@
+/*
+ * R-Car Generation 2 Power management support
+ *
+ * Copyright (C) 2013 - 2015 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/of.h>
+#include <linux/smp.h>
+#include <asm/io.h>
+#include "common.h"
+#include "pm-rcar.h"
+#include "rcar-gen2.h"
+
+/* RST */
+#define RST 0xe6160000
+#define CA15BAR 0x0020
+#define CA7BAR 0x0030
+#define CA15RESCNT 0x0040
+#define CA7RESCNT 0x0044
+
+/* On-chip RAM */
+#define MERAM 0xe8080000
+#define RAM 0xe6300000
+
+/* SYSC */
+#define SYSCIER 0x0c
+#define SYSCIMR 0x10
+
+#if defined(CONFIG_SMP)
+
+static void __init rcar_gen2_sysc_init(u32 syscier)
+{
+ void __iomem *base = rcar_sysc_init(0xe6180000);
+
+ /* enable all interrupt sources, but do not use interrupt handler */
+ iowrite32(syscier, base + SYSCIER);
+ iowrite32(0, base + SYSCIMR);
+}
+
+#else /* CONFIG_SMP */
+
+static inline void rcar_gen2_sysc_init(u32 syscier) {}
+
+#endif /* CONFIG_SMP */
+
+void __init rcar_gen2_pm_init(void)
+{
+ void __iomem *p;
+ u32 bar;
+ static int once;
+ struct device_node *np, *cpus;
+ bool has_a7 = false;
+ bool has_a15 = false;
+ phys_addr_t boot_vector_addr = 0;
+ u32 syscier = 0;
+
+ if (once++)
+ return;
+
+ cpus = of_find_node_by_path("/cpus");
+ if (!cpus)
+ return;
+
+ for_each_child_of_node(cpus, np) {
+ if (of_device_is_compatible(np, "arm,cortex-a15"))
+ has_a15 = true;
+ else if (of_device_is_compatible(np, "arm,cortex-a7"))
+ has_a7 = true;
+ }
+
+ if (of_machine_is_compatible("renesas,r8a7790")) {
+ boot_vector_addr = MERAM;
+ syscier = 0x013111ef;
+
+ } else if (of_machine_is_compatible("renesas,r8a7791")) {
+ boot_vector_addr = RAM;
+ syscier = 0x00111003;
+ }
+
+ /* RAM for jump stub, because BAR requires 256KB aligned address */
+ p = ioremap_nocache(boot_vector_addr, shmobile_boot_size);
+ memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);
+ iounmap(p);
+
+ /* setup reset vectors */
+ p = ioremap_nocache(RST, 0x63);
+ bar = (boot_vector_addr >> 8) & 0xfffffc00;
+ if (has_a15) {
+ writel_relaxed(bar, p + CA15BAR);
+ writel_relaxed(bar | 0x10, p + CA15BAR);
+
+ /* de-assert reset for CA15 CPUs */
+ writel_relaxed((readl_relaxed(p + CA15RESCNT) & ~0x0f) |
+ 0xa5a50000, p + CA15RESCNT);
+ }
+ if (has_a7) {
+ writel_relaxed(bar, p + CA7BAR);
+ writel_relaxed(bar | 0x10, p + CA7BAR);
+
+ /* de-assert reset for CA7 CPUs */
+ writel_relaxed((readl_relaxed(p + CA7RESCNT) & ~0x0f) |
+ 0x5a5a0000, p + CA7RESCNT);
+ }
+ iounmap(p);
+
+ rcar_gen2_sysc_init(syscier);
+ shmobile_smp_apmu_suspend_init();
+}