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path: root/drivers/irqchip/exynos-combiner.c
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Diffstat (limited to 'drivers/irqchip/exynos-combiner.c')
-rw-r--r--drivers/irqchip/exynos-combiner.c125
1 files changed, 64 insertions, 61 deletions
diff --git a/drivers/irqchip/exynos-combiner.c b/drivers/irqchip/exynos-combiner.c
index 02492ab20d22..a9d2b2fa4afd 100644
--- a/drivers/irqchip/exynos-combiner.c
+++ b/drivers/irqchip/exynos-combiner.c
@@ -12,13 +12,16 @@
#include <linux/export.h>
#include <linux/init.h>
#include <linux/io.h>
+#include <linux/slab.h>
#include <linux/irqdomain.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <asm/mach/irq.h>
+#ifdef CONFIG_EXYNOS_ATAGS
#include <plat/cpu.h>
+#endif
#include "irqchip.h"
@@ -26,17 +29,18 @@
#define COMBINER_ENABLE_CLEAR 0x4
#define COMBINER_INT_STATUS 0xC
+#define IRQ_IN_COMBINER 8
+
static DEFINE_SPINLOCK(irq_controller_lock);
struct combiner_chip_data {
- unsigned int irq_offset;
+ unsigned int hwirq_offset;
unsigned int irq_mask;
void __iomem *base;
unsigned int parent_irq;
};
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)
{
@@ -77,11 +81,11 @@ static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
if (status == 0)
goto out;
- combiner_irq = __ffs(status);
+ combiner_irq = chip_data->hwirq_offset + __ffs(status);
+ cascade_irq = irq_find_mapping(combiner_irq_domain, combiner_irq);
- cascade_irq = combiner_irq + (chip_data->irq_offset & ~31);
- if (unlikely(cascade_irq >= NR_IRQS))
- do_bad_IRQ(cascade_irq, desc);
+ if (unlikely(!cascade_irq))
+ do_bad_IRQ(irq, desc);
else
generic_handle_irq(cascade_irq);
@@ -113,40 +117,25 @@ static struct irq_chip combiner_chip = {
#endif
};
-static unsigned int max_combiner_nr(void)
-{
- if (soc_is_exynos5250())
- return EXYNOS5_MAX_COMBINER_NR;
- else if (soc_is_exynos4412())
- return EXYNOS4412_MAX_COMBINER_NR;
- else if (soc_is_exynos4212())
- return EXYNOS4212_MAX_COMBINER_NR;
- else
- return EXYNOS4210_MAX_COMBINER_NR;
-}
-
-static void __init combiner_cascade_irq(unsigned int combiner_nr,
+static void __init combiner_cascade_irq(struct combiner_chip_data *combiner_data,
unsigned int irq)
{
- if (combiner_nr >= max_combiner_nr())
- BUG();
- if (irq_set_handler_data(irq, &combiner_data[combiner_nr]) != 0)
+ if (irq_set_handler_data(irq, combiner_data) != 0)
BUG();
irq_set_chained_handler(irq, combiner_handle_cascade_irq);
}
-static void __init combiner_init_one(unsigned int combiner_nr,
+static void __init combiner_init_one(struct combiner_chip_data *combiner_data,
+ unsigned int combiner_nr,
void __iomem *base, unsigned int irq)
{
- combiner_data[combiner_nr].base = base;
- 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);
- combiner_data[combiner_nr].parent_irq = irq;
+ combiner_data->base = base;
+ combiner_data->hwirq_offset = (combiner_nr & ~3) * IRQ_IN_COMBINER;
+ combiner_data->irq_mask = 0xff << ((combiner_nr % 4) << 3);
+ combiner_data->parent_irq = irq;
/* Disable all interrupts */
- __raw_writel(combiner_data[combiner_nr].irq_mask,
- base + COMBINER_ENABLE_CLEAR);
+ __raw_writel(combiner_data->irq_mask, base + COMBINER_ENABLE_CLEAR);
}
#ifdef CONFIG_OF
@@ -162,7 +151,7 @@ static int combiner_irq_domain_xlate(struct irq_domain *d,
if (intsize < 2)
return -EINVAL;
- *out_hwirq = intspec[0] * MAX_IRQ_IN_COMBINER + intspec[1];
+ *out_hwirq = intspec[0] * IRQ_IN_COMBINER + intspec[1];
*out_type = 0;
return 0;
@@ -181,6 +170,8 @@ static int combiner_irq_domain_xlate(struct irq_domain *d,
static int combiner_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hw)
{
+ struct combiner_chip_data *combiner_data = d->host_data;
+
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);
@@ -193,8 +184,12 @@ static struct irq_domain_ops combiner_irq_domain_ops = {
.map = combiner_irq_domain_map,
};
-static unsigned int exynos4x12_combiner_extra_irq(int group)
+static unsigned int combiner_lookup_irq(int group)
{
+#ifdef CONFIG_EXYNOS_ATAGS
+ if (group < EXYNOS4210_MAX_COMBINER_NR || soc_is_exynos5250())
+ return IRQ_SPI(group);
+
switch (group) {
case 16:
return IRQ_SPI(107);
@@ -204,53 +199,46 @@ static unsigned int exynos4x12_combiner_extra_irq(int group)
return IRQ_SPI(48);
case 19:
return IRQ_SPI(42);
- default:
- return 0;
}
+#endif
+ return 0;
}
void __init combiner_init(void __iomem *combiner_base,
- struct device_node *np)
+ struct device_node *np,
+ unsigned int max_nr,
+ int irq_base)
{
- int i, irq, irq_base;
- unsigned int max_nr, nr_irq;
+ int i, irq;
+ unsigned int nr_irq;
+ struct combiner_chip_data *combiner_data;
- max_nr = max_combiner_nr();
+ nr_irq = max_nr * IRQ_IN_COMBINER;
- if (np) {
- if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) {
- pr_info("%s: number of combiners not specified, "
- "setting default as %d.\n",
- __func__, max_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_data = kcalloc(max_nr, sizeof (*combiner_data), GFP_KERNEL);
+ if (!combiner_data) {
+ pr_warning("%s: could not allocate combiner data\n", __func__);
+ return;
}
- combiner_irq_domain = irq_domain_add_legacy(np, nr_irq, irq_base, 0,
- &combiner_irq_domain_ops, &combiner_data);
+ combiner_irq_domain = irq_domain_add_simple(np, nr_irq, irq_base,
+ &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++) {
- if (i < EXYNOS4210_MAX_COMBINER_NR || soc_is_exynos5250())
- irq = IRQ_SPI(i);
- else
- irq = exynos4x12_combiner_extra_irq(i);
#ifdef CONFIG_OF
if (np)
irq = irq_of_parse_and_map(np, i);
+ else
#endif
- combiner_init_one(i, combiner_base + (i >> 2) * 0x10, irq);
- combiner_cascade_irq(i, irq);
+ irq = combiner_lookup_irq(i);
+
+ combiner_init_one(&combiner_data[i], i,
+ combiner_base + (i >> 2) * 0x10, irq);
+ combiner_cascade_irq(&combiner_data[i], irq);
}
}
@@ -259,6 +247,8 @@ static int __init combiner_of_init(struct device_node *np,
struct device_node *parent)
{
void __iomem *combiner_base;
+ unsigned int max_nr = 20;
+ int irq_base = -1;
combiner_base = of_iomap(np, 0);
if (!combiner_base) {
@@ -266,7 +256,20 @@ static int __init combiner_of_init(struct device_node *np,
return -ENXIO;
}
- combiner_init(combiner_base, np);
+ if (of_property_read_u32(np, "samsung,combiner-nr", &max_nr)) {
+ pr_info("%s: number of combiners not specified, "
+ "setting default as %d.\n",
+ __func__, max_nr);
+ }
+
+ /*
+ * FIXME: This is a hardwired COMBINER_IRQ(0,0). Once all devices
+ * get their IRQ from DT, remove this in order to get dynamic
+ * allocation.
+ */
+ irq_base = 160;
+
+ combiner_init(combiner_base, np, max_nr, irq_base);
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-18 20:02:31 +0000