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author | Haojian Zhuang <haojian.zhuang@gmail.com> | 2013-04-21 10:53:02 +0200 |
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committer | Haojian Zhuang <haojian.zhuang@gmail.com> | 2013-08-24 11:42:09 +0200 |
commit | 0f374561b50df8f29e3427717b35dd57c7ac4ca4 (patch) | |
tree | d5b5275b3c77e80d6c9c01aacc8fb47e06e33489 /drivers/irqchip/irq-mmp.c | |
parent | irqchip: move mmp irq driver (diff) | |
download | linux-0f374561b50df8f29e3427717b35dd57c7ac4ca4.tar.xz linux-0f374561b50df8f29e3427717b35dd57c7ac4ca4.zip |
irqchip: mmp: support irqchip
Support IRQCHIP & CONFIG_MULTI_IRQ_HANDLER in irq-mmp driver.
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Reviewed-by: Daniel Drake <dsd@laptop.org>
Diffstat (limited to 'drivers/irqchip/irq-mmp.c')
-rw-r--r-- | drivers/irqchip/irq-mmp.c | 280 |
1 files changed, 165 insertions, 115 deletions
diff --git a/drivers/irqchip/irq-mmp.c b/drivers/irqchip/irq-mmp.c index dab6def93190..84d51ff836ee 100644 --- a/drivers/irqchip/irq-mmp.c +++ b/drivers/irqchip/irq-mmp.c @@ -21,6 +21,9 @@ #include <linux/of_address.h> #include <linux/of_irq.h> +#include <asm/exception.h> +#include <asm/mach/irq.h> + #include <mach/irqs.h> #ifdef CONFIG_CPU_MMP2 @@ -30,8 +33,17 @@ #include <mach/pm-pxa910.h> #endif +#include "irqchip.h" + #define MAX_ICU_NR 16 +#define PJ1_INT_SEL 0x10c +#define PJ4_INT_SEL 0x104 + +/* bit fields in PJ1_INT_SEL and PJ4_INT_SEL */ +#define SEL_INT_PENDING (1 << 6) +#define SEL_INT_NUM_MASK 0x3f + struct icu_chip_data { int nr_irqs; unsigned int virq_base; @@ -52,7 +64,7 @@ struct mmp_intc_conf { unsigned int conf_mask; }; -void __iomem *mmp_icu_base; +static void __iomem *mmp_icu_base; static struct icu_chip_data icu_data[MAX_ICU_NR]; static int max_icu_nr; @@ -191,6 +203,32 @@ static struct mmp_intc_conf mmp2_conf = { .conf_mask = 0x7f, }; +static asmlinkage void __exception_irq_entry +mmp_handle_irq(struct pt_regs *regs) +{ + int irq, hwirq; + + hwirq = readl_relaxed(mmp_icu_base + PJ1_INT_SEL); + if (!(hwirq & SEL_INT_PENDING)) + return; + hwirq &= SEL_INT_NUM_MASK; + irq = irq_find_mapping(icu_data[0].domain, hwirq); + handle_IRQ(irq, regs); +} + +static asmlinkage void __exception_irq_entry +mmp2_handle_irq(struct pt_regs *regs) +{ + int irq, hwirq; + + hwirq = readl_relaxed(mmp_icu_base + PJ4_INT_SEL); + if (!(hwirq & SEL_INT_PENDING)) + return; + hwirq &= SEL_INT_NUM_MASK; + irq = irq_find_mapping(icu_data[0].domain, hwirq); + handle_IRQ(irq, regs); +} + /* MMP (ARMv5) */ void __init icu_init_irq(void) { @@ -212,6 +250,7 @@ void __init icu_init_irq(void) set_irq_flags(irq, IRQF_VALID); } irq_set_default_host(icu_data[0].domain); + set_handle_irq(mmp_handle_irq); #ifdef CONFIG_CPU_PXA910 icu_irq_chip.irq_set_wake = pxa910_set_wake; #endif @@ -318,144 +357,155 @@ void __init mmp2_init_icu(void) set_irq_flags(irq, IRQF_VALID); } irq_set_default_host(icu_data[0].domain); + set_handle_irq(mmp2_handle_irq); #ifdef CONFIG_CPU_MMP2 icu_irq_chip.irq_set_wake = mmp2_set_wake; #endif } #ifdef CONFIG_OF -static const struct of_device_id intc_ids[] __initconst = { - { .compatible = "mrvl,mmp-intc", .data = &mmp_conf }, - { .compatible = "mrvl,mmp2-intc", .data = &mmp2_conf }, - {} -}; - -static const struct of_device_id mmp_mux_irq_match[] __initconst = { - { .compatible = "mrvl,mmp2-mux-intc" }, - {} -}; - -int __init mmp2_mux_init(struct device_node *parent) +static int __init mmp_init_bases(struct device_node *node) { - struct device_node *node; - const struct of_device_id *of_id; - struct resource res; - int i, irq_base, ret, irq; - u32 nr_irqs, mfp_irq; + int ret, nr_irqs, irq, i = 0; - node = parent; - max_icu_nr = 1; - for (i = 1; i < MAX_ICU_NR; i++) { - node = of_find_matching_node(node, mmp_mux_irq_match); - if (!node) - break; - of_id = of_match_node(&mmp_mux_irq_match[0], node); - ret = of_property_read_u32(node, "mrvl,intc-nr-irqs", - &nr_irqs); - if (ret) { - pr_err("Not found mrvl,intc-nr-irqs property\n"); - ret = -EINVAL; - goto err; - } - ret = of_address_to_resource(node, 0, &res); - if (ret < 0) { - pr_err("Not found reg property\n"); - ret = -EINVAL; - goto err; - } - icu_data[i].reg_status = mmp_icu_base + res.start; - ret = of_address_to_resource(node, 1, &res); - if (ret < 0) { - pr_err("Not found reg property\n"); - ret = -EINVAL; - goto err; - } - icu_data[i].reg_mask = mmp_icu_base + res.start; - icu_data[i].cascade_irq = irq_of_parse_and_map(node, 0); - if (!icu_data[i].cascade_irq) { - ret = -EINVAL; - goto err; - } + ret = of_property_read_u32(node, "mrvl,intc-nr-irqs", &nr_irqs); + if (ret) { + pr_err("Not found mrvl,intc-nr-irqs property\n"); + return ret; + } - irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0); - if (irq_base < 0) { - pr_err("Failed to allocate IRQ numbers for mux intc\n"); - ret = irq_base; + mmp_icu_base = of_iomap(node, 0); + if (!mmp_icu_base) { + pr_err("Failed to get interrupt controller register\n"); + return -ENOMEM; + } + + icu_data[0].virq_base = 0; + icu_data[0].domain = irq_domain_add_linear(node, nr_irqs, + &mmp_irq_domain_ops, + &icu_data[0]); + for (irq = 0; irq < nr_irqs; irq++) { + ret = irq_create_mapping(icu_data[0].domain, irq); + if (!ret) { + pr_err("Failed to mapping hwirq\n"); goto err; } - if (!of_property_read_u32(node, "mrvl,clr-mfp-irq", - &mfp_irq)) { - icu_data[i].clr_mfp_irq_base = irq_base; - icu_data[i].clr_mfp_hwirq = mfp_irq; - } - irq_set_chained_handler(icu_data[i].cascade_irq, - icu_mux_irq_demux); - icu_data[i].nr_irqs = nr_irqs; - icu_data[i].virq_base = irq_base; - icu_data[i].domain = irq_domain_add_legacy(node, nr_irqs, - irq_base, 0, - &mmp_irq_domain_ops, - &icu_data[i]); - for (irq = irq_base; irq < irq_base + nr_irqs; irq++) - icu_mask_irq(irq_get_irq_data(irq)); + if (!irq) + icu_data[0].virq_base = ret; } - max_icu_nr = i; + icu_data[0].nr_irqs = nr_irqs; return 0; err: - of_node_put(node); - max_icu_nr = i; - return ret; + if (icu_data[0].virq_base) { + for (i = 0; i < irq; i++) + irq_dispose_mapping(icu_data[0].virq_base + i); + } + irq_domain_remove(icu_data[0].domain); + iounmap(mmp_icu_base); + return -EINVAL; } -void __init mmp_dt_irq_init(void) +static int __init mmp_of_init(struct device_node *node, + struct device_node *parent) { - struct device_node *node; - const struct of_device_id *of_id; - struct mmp_intc_conf *conf; - int nr_irqs, irq_base, ret, irq; - - node = of_find_matching_node(NULL, intc_ids); - if (!node) { - pr_err("Failed to find interrupt controller in arch-mmp\n"); - return; - } - of_id = of_match_node(intc_ids, node); - conf = of_id->data; + int ret; - ret = of_property_read_u32(node, "mrvl,intc-nr-irqs", &nr_irqs); + ret = mmp_init_bases(node); + if (ret < 0) + return ret; + + icu_data[0].conf_enable = mmp_conf.conf_enable; + icu_data[0].conf_disable = mmp_conf.conf_disable; + icu_data[0].conf_mask = mmp_conf.conf_mask; + irq_set_default_host(icu_data[0].domain); + set_handle_irq(mmp_handle_irq); + max_icu_nr = 1; + return 0; +} +IRQCHIP_DECLARE(mmp_intc, "mrvl,mmp-intc", mmp_of_init); + +static int __init mmp2_of_init(struct device_node *node, + struct device_node *parent) +{ + int ret; + + ret = mmp_init_bases(node); + if (ret < 0) + return ret; + + icu_data[0].conf_enable = mmp2_conf.conf_enable; + icu_data[0].conf_disable = mmp2_conf.conf_disable; + icu_data[0].conf_mask = mmp2_conf.conf_mask; + irq_set_default_host(icu_data[0].domain); + set_handle_irq(mmp2_handle_irq); + max_icu_nr = 1; + return 0; +} +IRQCHIP_DECLARE(mmp2_intc, "mrvl,mmp2-intc", mmp2_of_init); + +static int __init mmp2_mux_of_init(struct device_node *node, + struct device_node *parent) +{ + struct resource res; + int i, ret, irq, j = 0; + u32 nr_irqs, mfp_irq; + + if (!parent) + return -ENODEV; + + i = max_icu_nr; + ret = of_property_read_u32(node, "mrvl,intc-nr-irqs", + &nr_irqs); if (ret) { pr_err("Not found mrvl,intc-nr-irqs property\n"); - return; + return -EINVAL; } - - mmp_icu_base = of_iomap(node, 0); - if (!mmp_icu_base) { - pr_err("Failed to get interrupt controller register\n"); - return; + ret = of_address_to_resource(node, 0, &res); + if (ret < 0) { + pr_err("Not found reg property\n"); + return -EINVAL; } - - irq_base = irq_alloc_descs(-1, 0, nr_irqs - NR_IRQS_LEGACY, 0); - if (irq_base < 0) { - pr_err("Failed to allocate IRQ numbers\n"); - goto err; - } else if (irq_base != NR_IRQS_LEGACY) { - pr_err("ICU's irqbase should be started from 0\n"); - goto err; + icu_data[i].reg_status = mmp_icu_base + res.start; + ret = of_address_to_resource(node, 1, &res); + if (ret < 0) { + pr_err("Not found reg property\n"); + return -EINVAL; } - icu_data[0].conf_enable = conf->conf_enable; - icu_data[0].conf_disable = conf->conf_disable; - icu_data[0].conf_mask = conf->conf_mask; - icu_data[0].nr_irqs = nr_irqs; - icu_data[0].virq_base = 0; - icu_data[0].domain = irq_domain_add_legacy(node, nr_irqs, 0, 0, + icu_data[i].reg_mask = mmp_icu_base + res.start; + icu_data[i].cascade_irq = irq_of_parse_and_map(node, 0); + if (!icu_data[i].cascade_irq) + return -EINVAL; + + icu_data[i].virq_base = 0; + icu_data[i].domain = irq_domain_add_linear(node, nr_irqs, &mmp_irq_domain_ops, - &icu_data[0]); - irq_set_default_host(icu_data[0].domain); - for (irq = 0; irq < nr_irqs; irq++) - icu_mask_irq(irq_get_irq_data(irq)); - mmp2_mux_init(node); - return; + &icu_data[i]); + for (irq = 0; irq < nr_irqs; irq++) { + ret = irq_create_mapping(icu_data[i].domain, irq); + if (!ret) { + pr_err("Failed to mapping hwirq\n"); + goto err; + } + if (!irq) + icu_data[i].virq_base = ret; + } + icu_data[i].nr_irqs = nr_irqs; + if (!of_property_read_u32(node, "mrvl,clr-mfp-irq", + &mfp_irq)) { + icu_data[i].clr_mfp_irq_base = icu_data[i].virq_base; + icu_data[i].clr_mfp_hwirq = mfp_irq; + } + irq_set_chained_handler(icu_data[i].cascade_irq, + icu_mux_irq_demux); + max_icu_nr++; + return 0; err: - iounmap(mmp_icu_base); + if (icu_data[i].virq_base) { + for (j = 0; j < irq; j++) + irq_dispose_mapping(icu_data[i].virq_base + j); + } + irq_domain_remove(icu_data[i].domain); + return -EINVAL; } +IRQCHIP_DECLARE(mmp2_mux_intc, "mrvl,mmp2-mux-intc", mmp2_mux_of_init); #endif |