diff options
author | Thomas Abraham <thomas.abraham@linaro.org> | 2012-05-15 07:18:35 (GMT) |
---|---|---|
committer | Kukjin Kim <kgene.kim@samsung.com> | 2012-05-15 22:03:44 (GMT) |
commit | 1e60bc0b5f488c8acde22adeb62118ccfdb49062 (patch) | |
tree | a84b04ae45b848ae00fa8283728f678ce78d07fc | |
parent | 9ee6af9c3fad48cddc0684d0c77d3ea1329e10a1 (diff) | |
download | linux-fsl-qoriq-1e60bc0b5f488c8acde22adeb62118ccfdb49062.tar.xz |
ARM: EXYNOS: Add irq_domain support for interrupt combiner
Add irq_domain support for hardware interrupts of the interrupt combiner.
The hardware interrupts of all the instances of the combiner are grouped
in a single irq_domain.
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
-rw-r--r-- | arch/arm/mach-exynos/common.c | 88 |
1 files changed, 50 insertions, 38 deletions
diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c index 3302a8d..a688c17 100644 --- a/arch/arm/mach-exynos/common.c +++ b/arch/arm/mach-exynos/common.c @@ -19,6 +19,8 @@ #include <linux/serial_core.h> #include <linux/of.h> #include <linux/of_irq.h> +#include <linux/export.h> +#include <linux/irqdomain.h> #include <asm/proc-fns.h> #include <asm/exception.h> @@ -399,6 +401,7 @@ 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 +414,14 @@ 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); } @@ -474,36 +477,58 @@ 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); +} + +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); + + return 0; +} + +static struct irq_domain_ops combiner_irq_domain_ops = { + .map = combiner_irq_domain_map, +}; + +void __init combiner_init(void __iomem *combiner_base, struct device_node *np) +{ + int i, irq_base; + unsigned int max_nr, nr_irq; + + 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); + } - /* Setup the Linux IRQ subsystem */ + 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 = 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); + for (i = 0; i < max_nr; i++) { + combiner_init_one(i, combiner_base + (i >> 2) * 0x10); + combiner_cascade_irq(i, IRQ_SPI(i)); } } @@ -516,7 +541,6 @@ static const struct of_device_id exynos4_dt_irq_match[] = { void __init exynos4_init_irq(void) { - int irq; unsigned int gic_bank_offset; gic_bank_offset = soc_is_exynos4412() ? 0x4000 : 0x8000; @@ -528,12 +552,7 @@ 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)); - } + combiner_init(S5P_VA_COMBINER_BASE, NULL); /* * The parameters of s5p_init_irq() are for VIC init. @@ -545,17 +564,10 @@ 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)); - } + combiner_init(S5P_VA_COMBINER_BASE, NULL); /* * The parameters of s5p_init_irq() are for VIC init. |