1 files changed, 120 insertions, 62 deletions

diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 5ccd6e80a607..49134711f4c6 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -19,6 +19,9 @@
 #include <linux/serial_core.h>
 #include <linux/of.h>
 #include <linux/of_irq.h>
+#include <linux/export.h>
+#include <linux/irqdomain.h>
+#include <linux/of_address.h>
 
 #include <asm/proc-fns.h>
 #include <asm/exception.h>
@@ -265,12 +268,12 @@ static struct map_desc exynos5_iodesc[] __initdata = {
         }, {
                 .virtual        = (unsigned long)S5P_VA_GIC_CPU,
                 .pfn            = __phys_to_pfn(EXYNOS5_PA_GIC_CPU),
-                .length         = SZ_64K,
+                .length         = SZ_8K,
                 .type           = MT_DEVICE,
         }, {
                 .virtual        = (unsigned long)S5P_VA_GIC_DIST,
                 .pfn            = __phys_to_pfn(EXYNOS5_PA_GIC_DIST),
-                .length         = SZ_64K,
+                .length         = SZ_4K,
                 .type           = MT_DEVICE,
         },
 };
@@ -399,6 +402,7 @@ struct combiner_chip_data {
         void __iomem *base;
 };
 
+static struct irq_domain *combiner_irq_domain;
 static struct combiner_chip_data combiner_data[MAX_COMBINER_NR];
 
 static inline void __iomem *combiner_base(struct irq_data *data)
@@ -411,14 +415,14 @@ static inline void __iomem *combiner_base(struct irq_data *data)
 
 static void combiner_mask_irq(struct irq_data *data)
 {
-        u32 mask = 1 << (data->irq % 32);
+        u32 mask = 1 << (data->hwirq % 32);
 
         __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_CLEAR);
 }
 
 static void combiner_unmask_irq(struct irq_data *data)
 {
-        u32 mask = 1 << (data->irq % 32);
+        u32 mask = 1 << (data->hwirq % 32);
 
         __raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_SET);
 }
@@ -474,49 +478,131 @@ static void __init combiner_cascade_irq(unsigned int combiner_nr, unsigned int i
         irq_set_chained_handler(irq, combiner_handle_cascade_irq);
 }
 
-static void __init combiner_init(unsigned int combiner_nr, void __iomem *base,
-                          unsigned int irq_start)
+static void __init combiner_init_one(unsigned int combiner_nr,
+                                     void __iomem *base)
 {
-        unsigned int i;
-        unsigned int max_nr;
-
-        if (soc_is_exynos5250())
-                max_nr = EXYNOS5_MAX_COMBINER_NR;
-        else
-                max_nr = EXYNOS4_MAX_COMBINER_NR;
-
-        if (combiner_nr >= max_nr)
-                BUG();
-
         combiner_data[combiner_nr].base = base;
-        combiner_data[combiner_nr].irq_offset = irq_start;
+        combiner_data[combiner_nr].irq_offset = irq_find_mapping(
+                combiner_irq_domain, combiner_nr * MAX_IRQ_IN_COMBINER);
         combiner_data[combiner_nr].irq_mask = 0xff << ((combiner_nr % 4) << 3);
 
         /* Disable all interrupts */
-
         __raw_writel(combiner_data[combiner_nr].irq_mask,
                      base + COMBINER_ENABLE_CLEAR);
+}
+
+#ifdef CONFIG_OF
+static int combiner_irq_domain_xlate(struct irq_domain *d,
+                                     struct device_node *controller,
+                                     const u32 *intspec, unsigned int intsize,
+                                     unsigned long *out_hwirq,
+                                     unsigned int *out_type)
+{
+        if (d->of_node != controller)
+                return -EINVAL;
+
+        if (intsize < 2)
+                return -EINVAL;
+
+        *out_hwirq = intspec[0] * MAX_IRQ_IN_COMBINER + intspec[1];
+        *out_type = 0;
+
+        return 0;
+}
+#else
+static int combiner_irq_domain_xlate(struct irq_domain *d,
+                                     struct device_node *controller,
+                                     const u32 *intspec, unsigned int intsize,
+                                     unsigned long *out_hwirq,
+                                     unsigned int *out_type)
+{
+        return -EINVAL;
+}
+#endif
+
+static int combiner_irq_domain_map(struct irq_domain *d, unsigned int irq,
+                                   irq_hw_number_t hw)
+{
+        irq_set_chip_and_handler(irq, &combiner_chip, handle_level_irq);
+        irq_set_chip_data(irq, &combiner_data[hw >> 3]);
+        set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 
-        /* Setup the Linux IRQ subsystem */
+        return 0;
+}
+
+static struct irq_domain_ops combiner_irq_domain_ops = {
+        .xlate  = combiner_irq_domain_xlate,
+        .map    = combiner_irq_domain_map,
+};
 
-        for (i = irq_start; i < combiner_data[combiner_nr].irq_offset
-                                + MAX_IRQ_IN_COMBINER; i++) {
-                irq_set_chip_and_handler(i, &combiner_chip, handle_level_irq);
-                irq_set_chip_data(i, &combiner_data[combiner_nr]);
-                set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
+void __init combiner_init(void __iomem *combiner_base, struct device_node *np)
+{
+        int i, irq, irq_base;
+        unsigned int max_nr, nr_irq;
+
+        if (np) {
+                if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) {
+                        pr_warning("%s: number of combiners not specified, "
+                                "setting default as %d.\n",
+                                __func__, EXYNOS4_MAX_COMBINER_NR);
+                        max_nr = EXYNOS4_MAX_COMBINER_NR;
+                }
+        } else {
+                max_nr = soc_is_exynos5250() ? EXYNOS5_MAX_COMBINER_NR :
+                                                EXYNOS4_MAX_COMBINER_NR;
+        }
+        nr_irq = max_nr * MAX_IRQ_IN_COMBINER;
+
+        irq_base = irq_alloc_descs(COMBINER_IRQ(0, 0), 1, nr_irq, 0);
+        if (IS_ERR_VALUE(irq_base)) {
+                irq_base = COMBINER_IRQ(0, 0);
+                pr_warning("%s: irq desc alloc failed. Continuing with %d as linux irq base\n", __func__, irq_base);
+        }
+
+        combiner_irq_domain = irq_domain_add_legacy(np, nr_irq, irq_base, 0,
+                                &combiner_irq_domain_ops, &combiner_data);
+        if (WARN_ON(!combiner_irq_domain)) {
+                pr_warning("%s: irq domain init failed\n", __func__);
+                return;
+        }
+
+        for (i = 0; i < max_nr; i++) {
+                combiner_init_one(i, combiner_base + (i >> 2) * 0x10);
+                irq = IRQ_SPI(i);
+#ifdef CONFIG_OF
+                if (np)
+                        irq = irq_of_parse_and_map(np, i);
+#endif
+                combiner_cascade_irq(i, irq);
         }
 }
 
 #ifdef CONFIG_OF
+int __init combiner_of_init(struct device_node *np, struct device_node *parent)
+{
+        void __iomem *combiner_base;
+
+        combiner_base = of_iomap(np, 0);
+        if (!combiner_base) {
+                pr_err("%s: failed to map combiner registers\n", __func__);
+                return -ENXIO;
+        }
+
+        combiner_init(combiner_base, np);
+
+        return 0;
+}
+
 static const struct of_device_id exynos4_dt_irq_match[] = {
         { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
+        { .compatible = "samsung,exynos4210-combiner",
+                        .data = combiner_of_init, },
         {},
 };
 #endif
 
 void __init exynos4_init_irq(void)
 {
-        int irq;
         unsigned int gic_bank_offset;
 
         gic_bank_offset = soc_is_exynos4412() ? 0x4000 : 0x8000;
@@ -528,12 +614,8 @@ void __init exynos4_init_irq(void)
                 of_irq_init(exynos4_dt_irq_match);
 #endif
 
-        for (irq = 0; irq < EXYNOS4_MAX_COMBINER_NR; irq++) {
-
-                combiner_init(irq, (void __iomem *)S5P_VA_COMBINER(irq),
-                                COMBINER_IRQ(irq, 0));
-                combiner_cascade_irq(irq, IRQ_SPI(irq));
-        }
+        if (!of_have_populated_dt())
+                combiner_init(S5P_VA_COMBINER_BASE, NULL);
 
         /*
          * The parameters of s5p_init_irq() are for VIC init.
@@ -545,18 +627,9 @@ void __init exynos4_init_irq(void)
 
 void __init exynos5_init_irq(void)
 {
-        int irq;
-
 #ifdef CONFIG_OF
         of_irq_init(exynos4_dt_irq_match);
 #endif
-
-        for (irq = 0; irq < EXYNOS5_MAX_COMBINER_NR; irq++) {
-                combiner_init(irq, (void __iomem *)S5P_VA_COMBINER(irq),
-                                COMBINER_IRQ(irq, 0));
-                combiner_cascade_irq(irq, IRQ_SPI(irq));
-        }
-
         /*
          * The parameters of s5p_init_irq() are for VIC init.
          * Theses parameters should be NULL and 0 because EXYNOS4
@@ -565,30 +638,18 @@ void __init exynos5_init_irq(void)
         s5p_init_irq(NULL, 0);
 }
 
-struct bus_type exynos4_subsys = {
-        .name           = "exynos4-core",
-        .dev_name       = "exynos4-core",
-};
-
-struct bus_type exynos5_subsys = {
-        .name           = "exynos5-core",
-        .dev_name       = "exynos5-core",
+struct bus_type exynos_subsys = {
+        .name           = "exynos-core",
+        .dev_name       = "exynos-core",
 };
 
 static struct device exynos4_dev = {
-        .bus    = &exynos4_subsys,
-};
-
-static struct device exynos5_dev = {
-        .bus    = &exynos5_subsys,
+        .bus    = &exynos_subsys,
 };
 
 static int __init exynos_core_init(void)
 {
-        if (soc_is_exynos5250())
-                return subsys_system_register(&exynos5_subsys, NULL);
-        else
-                return subsys_system_register(&exynos4_subsys, NULL);
+        return subsys_system_register(&exynos_subsys, NULL);
 }
 core_initcall(exynos_core_init);
 
@@ -675,10 +736,7 @@ static int __init exynos_init(void)
 {
         printk(KERN_INFO "EXYNOS: Initializing architecture\n");
 
-        if (soc_is_exynos5250())
-                return device_register(&exynos5_dev);
-        else
-                return device_register(&exynos4_dev);
+        return device_register(&exynos4_dev);
 }
 
 /* uart registration process */