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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-02 09:38:16 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-02 09:38:16 -0700
commit99c6bcf46d2233d33e441834e958ed0bc22b190a (patch)
tree25abf5e856bc0f08d75e623715eb5acc4d4de2b2 /drivers/irqchip
parent97b1007a2924aaa9126398623f6755a8c3c6a616 (diff)
parent2fdfe1c26fb9f24cfdf124384abb35396ca2cd3f (diff)
Merge tag 'multiplatform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC multiplatform updates from Olof Johansson: "More multiplatform enablement for ARM platforms. The ones converted in this branch are: - bcm2835 - cns3xxx - sirf - nomadik - msx - spear - tegra - ux500 We're getting close to having most of them converted! One of the larger platforms remaining is Samsung Exynos, and there are a bunch of supporting patches in this merge window for it. There was a patch in this branch to a early version of multiplatform conversion, but it ended up being reverted due to need of more bake time. The revert commit is part of the branch since it would have required rebasing multiple dependent branches and they were stable by then" * tag 'multiplatform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (70 commits) mmc: sdhci-s3c: Fix operation on non-single image Samsung platforms clocksource: nomadik-mtu: fix up clocksource/timer Revert "ARM: exynos: enable multiplatform support" ARM: SPEAr13xx: Fix typo "ARCH_HAVE_CPUFREQ" ARM: exynos: enable multiplatform support rtc: s3c: make header file local mtd: onenand/samsung: make regs-onenand.h file local thermal/exynos: remove unnecessary header inclusions mmc: sdhci-s3c: remove platform dependencies ARM: samsung: move mfc device definition to s5p-dev-mfc.c ARM: exynos: move debug-macro.S to include/debug/ ARM: exynos: prepare for sparse IRQ ARM: exynos: introduce EXYNOS_ATAGS symbol ARM: tegra: build assembly files with -march=armv7-a ARM: Push selects for TWD/SCU into machine entries ARM: ux500: build hotplug.o for ARMv7-a ARM: ux500: move to multiplatform ARM: ux500: make remaining headers local ARM: ux500: make irqs.h local to platform ARM: ux500: get rid of <mach/[hardware|db8500-regs].h> ...
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/Makefile1
-rw-r--r--drivers/irqchip/irq-sirfsoc.c126
2 files changed, 127 insertions, 0 deletions
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index d5e119ca9425..10ef57f35a6e 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -9,4 +9,5 @@ obj-$(CONFIG_ARCH_SUNXI) += irq-sun4i.o
obj-$(CONFIG_ARCH_SPEAR3XX) += spear-shirq.o
obj-$(CONFIG_ARM_GIC) += irq-gic.o
obj-$(CONFIG_ARM_VIC) += irq-vic.o
+obj-$(CONFIG_SIRF_IRQ) += irq-sirfsoc.o
obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o
diff --git a/drivers/irqchip/irq-sirfsoc.c b/drivers/irqchip/irq-sirfsoc.c
new file mode 100644
index 000000000000..69ea44ebcf61
--- /dev/null
+++ b/drivers/irqchip/irq-sirfsoc.c
@@ -0,0 +1,126 @@
+/*
+ * interrupt controller support for CSR SiRFprimaII
+ *
+ * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
+ *
+ * Licensed under GPLv2 or later.
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/irqdomain.h>
+#include <linux/syscore_ops.h>
+#include <asm/mach/irq.h>
+#include <asm/exception.h>
+#include "irqchip.h"
+
+#define SIRFSOC_INT_RISC_MASK0 0x0018
+#define SIRFSOC_INT_RISC_MASK1 0x001C
+#define SIRFSOC_INT_RISC_LEVEL0 0x0020
+#define SIRFSOC_INT_RISC_LEVEL1 0x0024
+#define SIRFSOC_INIT_IRQ_ID 0x0038
+
+#define SIRFSOC_NUM_IRQS 128
+
+static struct irq_domain *sirfsoc_irqdomain;
+
+static __init void
+sirfsoc_alloc_gc(void __iomem *base, unsigned int irq_start, unsigned int num)
+{
+ struct irq_chip_generic *gc;
+ struct irq_chip_type *ct;
+
+ gc = irq_alloc_generic_chip("SIRFINTC", 1, irq_start, base, handle_level_irq);
+ ct = gc->chip_types;
+
+ ct->chip.irq_mask = irq_gc_mask_clr_bit;
+ ct->chip.irq_unmask = irq_gc_mask_set_bit;
+ ct->regs.mask = SIRFSOC_INT_RISC_MASK0;
+
+ irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE, IRQ_NOREQUEST, 0);
+}
+
+static asmlinkage void __exception_irq_entry sirfsoc_handle_irq(struct pt_regs *regs)
+{
+ void __iomem *base = sirfsoc_irqdomain->host_data;
+ u32 irqstat, irqnr;
+
+ irqstat = readl_relaxed(base + SIRFSOC_INIT_IRQ_ID);
+ irqnr = irq_find_mapping(sirfsoc_irqdomain, irqstat & 0xff);
+
+ handle_IRQ(irqnr, regs);
+}
+
+static int __init sirfsoc_irq_init(struct device_node *np, struct device_node *parent)
+{
+ void __iomem *base = of_iomap(np, 0);
+ if (!base)
+ panic("unable to map intc cpu registers\n");
+
+ /* using legacy because irqchip_generic does not work with linear */
+ sirfsoc_irqdomain = irq_domain_add_legacy(np, SIRFSOC_NUM_IRQS, 0, 0,
+ &irq_domain_simple_ops, base);
+
+ sirfsoc_alloc_gc(base, 0, 32);
+ sirfsoc_alloc_gc(base + 4, 32, SIRFSOC_NUM_IRQS - 32);
+
+ writel_relaxed(0, base + SIRFSOC_INT_RISC_LEVEL0);
+ writel_relaxed(0, base + SIRFSOC_INT_RISC_LEVEL1);
+
+ writel_relaxed(0, base + SIRFSOC_INT_RISC_MASK0);
+ writel_relaxed(0, base + SIRFSOC_INT_RISC_MASK1);
+
+ set_handle_irq(sirfsoc_handle_irq);
+
+ return 0;
+}
+IRQCHIP_DECLARE(sirfsoc_intc, "sirf,prima2-intc", sirfsoc_irq_init);
+
+struct sirfsoc_irq_status {
+ u32 mask0;
+ u32 mask1;
+ u32 level0;
+ u32 level1;
+};
+
+static struct sirfsoc_irq_status sirfsoc_irq_st;
+
+static int sirfsoc_irq_suspend(void)
+{
+ void __iomem *base = sirfsoc_irqdomain->host_data;
+
+ sirfsoc_irq_st.mask0 = readl_relaxed(base + SIRFSOC_INT_RISC_MASK0);
+ sirfsoc_irq_st.mask1 = readl_relaxed(base + SIRFSOC_INT_RISC_MASK1);
+ sirfsoc_irq_st.level0 = readl_relaxed(base + SIRFSOC_INT_RISC_LEVEL0);
+ sirfsoc_irq_st.level1 = readl_relaxed(base + SIRFSOC_INT_RISC_LEVEL1);
+
+ return 0;
+}
+
+static void sirfsoc_irq_resume(void)
+{
+ void __iomem *base = sirfsoc_irqdomain->host_data;
+
+ writel_relaxed(sirfsoc_irq_st.mask0, base + SIRFSOC_INT_RISC_MASK0);
+ writel_relaxed(sirfsoc_irq_st.mask1, base + SIRFSOC_INT_RISC_MASK1);
+ writel_relaxed(sirfsoc_irq_st.level0, base + SIRFSOC_INT_RISC_LEVEL0);
+ writel_relaxed(sirfsoc_irq_st.level1, base + SIRFSOC_INT_RISC_LEVEL1);
+}
+
+static struct syscore_ops sirfsoc_irq_syscore_ops = {
+ .suspend = sirfsoc_irq_suspend,
+ .resume = sirfsoc_irq_resume,
+};
+
+static int __init sirfsoc_irq_pm_init(void)
+{
+ if (!sirfsoc_irqdomain)
+ return 0;
+
+ register_syscore_ops(&sirfsoc_irq_syscore_ops);
+ return 0;
+}
+device_initcall(sirfsoc_irq_pm_init);