irqchip: mmp: support irqchip
authorHaojian Zhuang <haojian.zhuang@gmail.com>
Sun, 21 Apr 2013 08:53:02 +0000 (16:53 +0800)
committerHaojian Zhuang <haojian.zhuang@gmail.com>
Sat, 24 Aug 2013 09:42:09 +0000 (17:42 +0800)
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>
arch/arm/Kconfig
arch/arm/mach-mmp/include/mach/entry-macro.S [deleted file]
arch/arm/mach-mmp/mmp-dt.c
arch/arm/mach-mmp/mmp2-dt.c
drivers/irqchip/irq-mmp.c

index ba412e02ec0c492abed190202cab324d976d0eec..76793a633beea65e3bdc9c905577a3b6a535150b 100644 (file)
@@ -557,6 +557,7 @@ config ARCH_MMP
        select GENERIC_CLOCKEVENTS
        select GPIO_PXA
        select IRQ_DOMAIN
+       select MULTI_IRQ_HANDLER
        select NEED_MACH_GPIO_H
        select PINCTRL
        select PLAT_PXA
diff --git a/arch/arm/mach-mmp/include/mach/entry-macro.S b/arch/arm/mach-mmp/include/mach/entry-macro.S
deleted file mode 100644 (file)
index bd152e2..0000000
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * linux/arch/arm/mach-mmp/include/mach/entry-macro.S
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <asm/irq.h>
-#include <mach/regs-icu.h>
-
-       .macro  get_irqnr_preamble, base, tmp
-       mrc     p15, 0, \tmp, c0, c0, 0         @ CPUID
-       and     \tmp, \tmp, #0xff00
-       cmp     \tmp, #0x5800
-       ldr     \base, =mmp_icu_base
-       ldr     \base, [\base, #0]
-       addne   \base, \base, #0x10c            @ PJ1 AP INT SEL register
-       addeq   \base, \base, #0x104            @ PJ4 IRQ SEL register
-       .endm
-
-       .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
-       ldr     \tmp, [\base, #0]
-       and     \irqnr, \tmp, #0x3f
-       tst     \tmp, #(1 << 6)
-       .endm
index b37915dc44709852f39d716f11df69c66054abe3..cca529ceecb758101f0120faa547c2790b004e80 100644 (file)
@@ -9,17 +9,13 @@
  *  publishhed by the Free Software Foundation.
  */
 
-#include <linux/irq.h>
-#include <linux/irqdomain.h>
-#include <linux/of_irq.h>
+#include <linux/irqchip.h>
 #include <linux/of_platform.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>
-#include <mach/irqs.h>
 
 #include "common.h"
 
-extern void __init mmp_dt_irq_init(void);
 extern void __init mmp_dt_init_timer(void);
 
 static const struct of_dev_auxdata pxa168_auxdata_lookup[] __initconst = {
@@ -64,7 +60,6 @@ static const char *mmp_dt_board_compat[] __initdata = {
 
 DT_MACHINE_START(PXA168_DT, "Marvell PXA168 (Device Tree Support)")
        .map_io         = mmp_map_io,
-       .init_irq       = mmp_dt_irq_init,
        .init_time      = mmp_dt_init_timer,
        .init_machine   = pxa168_dt_init,
        .dt_compat      = mmp_dt_board_compat,
@@ -72,7 +67,6 @@ MACHINE_END
 
 DT_MACHINE_START(PXA910_DT, "Marvell PXA910 (Device Tree Support)")
        .map_io         = mmp_map_io,
-       .init_irq       = mmp_dt_irq_init,
        .init_time      = mmp_dt_init_timer,
        .init_machine   = pxa910_dt_init,
        .dt_compat      = mmp_dt_board_compat,
index 4ac256720f7db089531bdbb0452b11b9f7d47d3d..023cb453f157ff621110d6c17b6f0cc185b8d8ba 100644 (file)
  */
 
 #include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/irqdomain.h>
-#include <linux/of_irq.h>
+#include <linux/irqchip.h>
 #include <linux/of_platform.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>
-#include <mach/irqs.h>
-#include <mach/regs-apbc.h>
 
 #include "common.h"
 
-extern void __init mmp_dt_irq_init(void);
 extern void __init mmp_dt_init_timer(void);
 
 static const struct of_dev_auxdata mmp2_auxdata_lookup[] __initconst = {
@@ -49,7 +44,6 @@ static const char *mmp2_dt_board_compat[] __initdata = {
 
 DT_MACHINE_START(MMP2_DT, "Marvell MMP2 (Device Tree Support)")
        .map_io         = mmp_map_io,
-       .init_irq       = mmp_dt_irq_init,
        .init_time      = mmp_dt_init_timer,
        .init_machine   = mmp2_dt_init,
        .dt_compat      = mmp2_dt_board_compat,
index dab6def931902542704d4255d7061a4327e37c78..84d51ff836eee46e065bb657f6a53665670bc87d 100644 (file)
@@ -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
 #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