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-rw-r--r--drivers/irqchip/Kconfig7
-rw-r--r--drivers/irqchip/Makefile3
-rw-r--r--drivers/irqchip/irq-armada-370-xp.c106
-rw-r--r--drivers/irqchip/irq-crossbar.c210
-rw-r--r--drivers/irqchip/irq-digicolor.c4
-rw-r--r--drivers/irqchip/irq-gic.c61
-rw-r--r--drivers/irqchip/irq-mips-gic.c21
-rw-r--r--drivers/irqchip/irq-renesas-irqc.c58
-rw-r--r--drivers/irqchip/irq-st.c206
-rw-r--r--drivers/irqchip/irq-tegra.c377
-rw-r--r--drivers/irqchip/irq-vf610-mscm-ir.c212
11 files changed, 1083 insertions, 182 deletions
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index cc79d2a5a8c2..c8d260e33a90 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -110,6 +110,13 @@ config RENESAS_IRQC
bool
select IRQ_DOMAIN
+config ST_IRQCHIP
+ bool
+ select REGMAP
+ select MFD_SYSCON
+ help
+ Enables SysCfg Controlled IRQs on STi based platforms.
+
config TB10X_IRQC
bool
select IRQ_DOMAIN
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 42965d2476bb..552a74027601 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_ARCH_HIP04) += irq-hip04.o
obj-$(CONFIG_ARCH_MMP) += irq-mmp.o
obj-$(CONFIG_ARCH_MVEBU) += irq-armada-370-xp.o
obj-$(CONFIG_ARCH_MXS) += irq-mxs.o
+obj-$(CONFIG_ARCH_TEGRA) += irq-tegra.o
obj-$(CONFIG_ARCH_S3C24XX) += irq-s3c24xx.o
obj-$(CONFIG_DW_APB_ICTL) += irq-dw-apb-ictl.o
obj-$(CONFIG_METAG) += irq-metag-ext.o
@@ -33,10 +34,12 @@ obj-$(CONFIG_RENESAS_IRQC) += irq-renesas-irqc.o
obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o
obj-$(CONFIG_ARCH_NSPIRE) += irq-zevio.o
obj-$(CONFIG_ARCH_VT8500) += irq-vt8500.o
+obj-$(CONFIG_ST_IRQCHIP) += irq-st.o
obj-$(CONFIG_TB10X_IRQC) += irq-tb10x.o
obj-$(CONFIG_XTENSA) += irq-xtensa-pic.o
obj-$(CONFIG_XTENSA_MX) += irq-xtensa-mx.o
obj-$(CONFIG_IRQ_CROSSBAR) += irq-crossbar.o
+obj-$(CONFIG_SOC_VF610) += irq-vf610-mscm-ir.o
obj-$(CONFIG_BCM7120_L2_IRQ) += irq-bcm7120-l2.o
obj-$(CONFIG_BRCMSTB_L2_IRQ) += irq-brcmstb-l2.o
obj-$(CONFIG_KEYSTONE_IRQ) += irq-keystone.o
diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index 463c235acbdc..daccc8bdbb42 100644
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -38,6 +38,8 @@
/* Interrupt Controller Registers Map */
#define ARMADA_370_XP_INT_SET_MASK_OFFS (0x48)
#define ARMADA_370_XP_INT_CLEAR_MASK_OFFS (0x4C)
+#define ARMADA_370_XP_INT_FABRIC_MASK_OFFS (0x54)
+#define ARMADA_370_XP_INT_CAUSE_PERF(cpu) (1 << cpu)
#define ARMADA_370_XP_INT_CONTROL (0x00)
#define ARMADA_370_XP_INT_SET_ENABLE_OFFS (0x30)
@@ -56,6 +58,7 @@
#define ARMADA_370_XP_MAX_PER_CPU_IRQS (28)
#define ARMADA_370_XP_TIMER0_PER_CPU_IRQ (5)
+#define ARMADA_370_XP_FABRIC_IRQ (3)
#define IPI_DOORBELL_START (0)
#define IPI_DOORBELL_END (8)
@@ -69,6 +72,7 @@ static void __iomem *per_cpu_int_base;
static void __iomem *main_int_base;
static struct irq_domain *armada_370_xp_mpic_domain;
static u32 doorbell_mask_reg;
+static int parent_irq;
#ifdef CONFIG_PCI_MSI
static struct irq_domain *armada_370_xp_msi_domain;
static DECLARE_BITMAP(msi_used, PCI_MSI_DOORBELL_NR);
@@ -76,6 +80,17 @@ static DEFINE_MUTEX(msi_used_lock);
static phys_addr_t msi_doorbell_addr;
#endif
+static inline bool is_percpu_irq(irq_hw_number_t irq)
+{
+ switch (irq) {
+ case ARMADA_370_XP_TIMER0_PER_CPU_IRQ:
+ case ARMADA_370_XP_FABRIC_IRQ:
+ return true;
+ default:
+ return false;
+ }
+}
+
/*
* In SMP mode:
* For shared global interrupts, mask/unmask global enable bit
@@ -85,7 +100,7 @@ static void armada_370_xp_irq_mask(struct irq_data *d)
{
irq_hw_number_t hwirq = irqd_to_hwirq(d);
- if (hwirq != ARMADA_370_XP_TIMER0_PER_CPU_IRQ)
+ if (!is_percpu_irq(hwirq))
writel(hwirq, main_int_base +
ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS);
else
@@ -97,7 +112,7 @@ static void armada_370_xp_irq_unmask(struct irq_data *d)
{
irq_hw_number_t hwirq = irqd_to_hwirq(d);
- if (hwirq != ARMADA_370_XP_TIMER0_PER_CPU_IRQ)
+ if (!is_percpu_irq(hwirq))
writel(hwirq, main_int_base +
ARMADA_370_XP_INT_SET_ENABLE_OFFS);
else
@@ -280,20 +295,21 @@ static struct irq_chip armada_370_xp_irq_chip = {
#ifdef CONFIG_SMP
.irq_set_affinity = armada_xp_set_affinity,
#endif
+ .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND,
};
static int armada_370_xp_mpic_irq_map(struct irq_domain *h,
unsigned int virq, irq_hw_number_t hw)
{
armada_370_xp_irq_mask(irq_get_irq_data(virq));
- if (hw != ARMADA_370_XP_TIMER0_PER_CPU_IRQ)
+ if (!is_percpu_irq(hw))
writel(hw, per_cpu_int_base +
ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
else
writel(hw, main_int_base + ARMADA_370_XP_INT_SET_ENABLE_OFFS);
irq_set_status_flags(virq, IRQ_LEVEL);
- if (hw == ARMADA_370_XP_TIMER0_PER_CPU_IRQ) {
+ if (is_percpu_irq(hw)) {
irq_set_percpu_devid(virq);
irq_set_chip_and_handler(virq, &armada_370_xp_irq_chip,
handle_percpu_devid_irq);
@@ -307,28 +323,6 @@ static int armada_370_xp_mpic_irq_map(struct irq_domain *h,
return 0;
}
-#ifdef CONFIG_SMP
-static void armada_mpic_send_doorbell(const struct cpumask *mask,
- unsigned int irq)
-{
- int cpu;
- unsigned long map = 0;
-
- /* Convert our logical CPU mask into a physical one. */
- for_each_cpu(cpu, mask)
- map |= 1 << cpu_logical_map(cpu);
-
- /*
- * Ensure that stores to Normal memory are visible to the
- * other CPUs before issuing the IPI.
- */
- dsb();
-
- /* submit softirq */
- writel((map << 8) | irq, main_int_base +
- ARMADA_370_XP_SW_TRIG_INT_OFFS);
-}
-
static void armada_xp_mpic_smp_cpu_init(void)
{
u32 control;
@@ -351,11 +345,45 @@ static void armada_xp_mpic_smp_cpu_init(void)
writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS);
}
+static void armada_xp_mpic_perf_init(void)
+{
+ unsigned long cpuid = cpu_logical_map(smp_processor_id());
+
+ /* Enable Performance Counter Overflow interrupts */
+ writel(ARMADA_370_XP_INT_CAUSE_PERF(cpuid),
+ per_cpu_int_base + ARMADA_370_XP_INT_FABRIC_MASK_OFFS);
+}
+
+#ifdef CONFIG_SMP
+static void armada_mpic_send_doorbell(const struct cpumask *mask,
+ unsigned int irq)
+{
+ int cpu;
+ unsigned long map = 0;
+
+ /* Convert our logical CPU mask into a physical one. */
+ for_each_cpu(cpu, mask)
+ map |= 1 << cpu_logical_map(cpu);
+
+ /*
+ * Ensure that stores to Normal memory are visible to the
+ * other CPUs before issuing the IPI.
+ */
+ dsb();
+
+ /* submit softirq */
+ writel((map << 8) | irq, main_int_base +
+ ARMADA_370_XP_SW_TRIG_INT_OFFS);
+}
+
static int armada_xp_mpic_secondary_init(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
- if (action == CPU_STARTING || action == CPU_STARTING_FROZEN)
+ if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) {
+ armada_xp_mpic_perf_init();
armada_xp_mpic_smp_cpu_init();
+ }
+
return NOTIFY_OK;
}
@@ -364,6 +392,21 @@ static struct notifier_block armada_370_xp_mpic_cpu_notifier = {
.priority = 100,
};
+static int mpic_cascaded_secondary_init(struct notifier_block *nfb,
+ unsigned long action, void *hcpu)
+{
+ if (action == CPU_STARTING || action == CPU_STARTING_FROZEN) {
+ armada_xp_mpic_perf_init();
+ enable_percpu_irq(parent_irq, IRQ_TYPE_NONE);
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block mpic_cascaded_cpu_notifier = {
+ .notifier_call = mpic_cascaded_secondary_init,
+ .priority = 100,
+};
#endif /* CONFIG_SMP */
static struct irq_domain_ops armada_370_xp_mpic_irq_ops = {
@@ -539,7 +582,7 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node,
struct device_node *parent)
{
struct resource main_int_res, per_cpu_int_res;
- int parent_irq, nr_irqs, i;
+ int nr_irqs, i;
u32 control;
BUG_ON(of_address_to_resource(node, 0, &main_int_res));
@@ -572,9 +615,9 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node,
BUG_ON(!armada_370_xp_mpic_domain);
-#ifdef CONFIG_SMP
+ /* Setup for the boot CPU */
+ armada_xp_mpic_perf_init();
armada_xp_mpic_smp_cpu_init();
-#endif
armada_370_xp_msi_init(node, main_int_res.start);
@@ -587,6 +630,9 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node,
register_cpu_notifier(&armada_370_xp_mpic_cpu_notifier);
#endif
} else {
+#ifdef CONFIG_SMP
+ register_cpu_notifier(&mpic_cascaded_cpu_notifier);
+#endif
irq_set_chained_handler(parent_irq,
armada_370_xp_mpic_handle_cascade_irq);
}
diff --git a/drivers/irqchip/irq-crossbar.c b/drivers/irqchip/irq-crossbar.c
index bbbaf5de65d2..692fe2bc8197 100644
--- a/drivers/irqchip/irq-crossbar.c
+++ b/drivers/irqchip/irq-crossbar.c
@@ -11,11 +11,12 @@
*/
#include <linux/err.h>
#include <linux/io.h>
+#include <linux/irqdomain.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/slab.h>
-#include <linux/irqchip/arm-gic.h>
-#include <linux/irqchip/irq-crossbar.h>
+
+#include "irqchip.h"
#define IRQ_FREE -1
#define IRQ_RESERVED -2
@@ -24,6 +25,7 @@
/**
* struct crossbar_device - crossbar device description
+ * @lock: spinlock serializing access to @irq_map
* @int_max: maximum number of supported interrupts
* @safe_map: safe default value to initialize the crossbar
* @max_crossbar_sources: Maximum number of crossbar sources
@@ -33,6 +35,7 @@
* @write: register write function pointer
*/
struct crossbar_device {
+ raw_spinlock_t lock;
uint int_max;
uint safe_map;
uint max_crossbar_sources;
@@ -44,72 +47,101 @@ struct crossbar_device {
static struct crossbar_device *cb;
-static inline void crossbar_writel(int irq_no, int cb_no)
+static void crossbar_writel(int irq_no, int cb_no)
{
writel(cb_no, cb->crossbar_base + cb->register_offsets[irq_no]);
}
-static inline void crossbar_writew(int irq_no, int cb_no)
+static void crossbar_writew(int irq_no, int cb_no)
{
writew(cb_no, cb->crossbar_base + cb->register_offsets[irq_no]);
}
-static inline void crossbar_writeb(int irq_no, int cb_no)
+static void crossbar_writeb(int irq_no, int cb_no)
{
writeb(cb_no, cb->crossbar_base + cb->register_offsets[irq_no]);
}
-static inline int get_prev_map_irq(int cb_no)
-{
- int i;
-
- for (i = cb->int_max - 1; i >= 0; i--)
- if (cb->irq_map[i] == cb_no)
- return i;
-
- return -ENODEV;
-}
+static struct irq_chip crossbar_chip = {
+ .name = "CBAR",
+ .irq_eoi = irq_chip_eoi_parent,
+ .irq_mask = irq_chip_mask_parent,
+ .irq_unmask = irq_chip_unmask_parent,
+ .irq_retrigger = irq_chip_retrigger_hierarchy,
+ .irq_set_wake = irq_chip_set_wake_parent,
+#ifdef CONFIG_SMP
+ .irq_set_affinity = irq_chip_set_affinity_parent,
+#endif
+};
-static inline int allocate_free_irq(int cb_no)
+static int allocate_gic_irq(struct irq_domain *domain, unsigned virq,
+ irq_hw_number_t hwirq)
{
+ struct of_phandle_args args;
int i;
+ int err;
+ raw_spin_lock(&cb->lock);
for (i = cb->int_max - 1; i >= 0; i--) {
if (cb->irq_map[i] == IRQ_FREE) {
- cb->irq_map[i] = cb_no;
- return i;
+ cb->irq_map[i] = hwirq;
+ break;
}
}
+ raw_spin_unlock(&cb->lock);
- return -ENODEV;
-}
+ if (i < 0)
+ return -ENODEV;
-static inline bool needs_crossbar_write(irq_hw_number_t hw)
-{
- int cb_no;
+ args.np = domain->parent->of_node;
+ args.args_count = 3;
+ args.args[0] = 0; /* SPI */
+ args.args[1] = i;
+ args.args[2] = IRQ_TYPE_LEVEL_HIGH;
- if (hw > GIC_IRQ_START) {
- cb_no = cb->irq_map[hw - GIC_IRQ_START];
- if (cb_no != IRQ_RESERVED && cb_no != IRQ_SKIP)
- return true;
- }
+ err = irq_domain_alloc_irqs_parent(domain, virq, 1, &args);
+ if (err)
+ cb->irq_map[i] = IRQ_FREE;
+ else
+ cb->write(i, hwirq);
- return false;
+ return err;
}
-static int crossbar_domain_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hw)
+static int crossbar_domain_alloc(struct irq_domain *d, unsigned int virq,
+ unsigned int nr_irqs, void *data)
{
- if (needs_crossbar_write(hw))
- cb->write(hw - GIC_IRQ_START, cb->irq_map[hw - GIC_IRQ_START]);
+ struct of_phandle_args *args = data;
+ irq_hw_number_t hwirq;
+ int i;
+
+ if (args->args_count != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (args->args[0] != 0)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ hwirq = args->args[1];
+ if ((hwirq + nr_irqs) > cb->max_crossbar_sources)
+ return -EINVAL; /* Can't deal with this */
+
+ for (i = 0; i < nr_irqs; i++) {
+ int err = allocate_gic_irq(d, virq + i, hwirq + i);
+
+ if (err)
+ return err;
+
+ irq_domain_set_hwirq_and_chip(d, virq + i, hwirq + i,
+ &crossbar_chip, NULL);
+ }
return 0;
}
/**
- * crossbar_domain_unmap - unmap a crossbar<->irq connection
- * @d: domain of irq to unmap
- * @irq: virq number
+ * crossbar_domain_free - unmap/free a crossbar<->irq connection
+ * @domain: domain of irq to unmap
+ * @virq: virq number
+ * @nr_irqs: number of irqs to free
*
* We do not maintain a use count of total number of map/unmap
* calls for a particular irq to find out if a irq can be really
@@ -117,14 +149,20 @@ static int crossbar_domain_map(struct irq_domain *d, unsigned int irq,
* after which irq is anyways unusable. So an explicit map has to be called
* after that.
*/
-static void crossbar_domain_unmap(struct irq_domain *d, unsigned int irq)
+static void crossbar_domain_free(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs)
{
- irq_hw_number_t hw = irq_get_irq_data(irq)->hwirq;
+ int i;
- if (needs_crossbar_write(hw)) {
- cb->irq_map[hw - GIC_IRQ_START] = IRQ_FREE;
- cb->write(hw - GIC_IRQ_START, cb->safe_map);
+ raw_spin_lock(&cb->lock);
+ for (i = 0; i < nr_irqs; i++) {
+ struct irq_data *d = irq_domain_get_irq_data(domain, virq + i);
+
+ irq_domain_reset_irq_data(d);
+ cb->irq_map[d->hwirq] = IRQ_FREE;
+ cb->write(d->hwirq, cb->safe_map);
}
+ raw_spin_unlock(&cb->lock);
}
static int crossbar_domain_xlate(struct irq_domain *d,
@@ -133,44 +171,22 @@ static int crossbar_domain_xlate(struct irq_domain *d,
unsigned long *out_hwirq,
unsigned int *out_type)
{
- int ret;
- int req_num = intspec[1];
- int direct_map_num;
-
- if (req_num >= cb->max_crossbar_sources) {
- direct_map_num = req_num - cb->max_crossbar_sources;
- if (direct_map_num < cb->int_max) {
- ret = cb->irq_map[direct_map_num];
- if (ret == IRQ_RESERVED || ret == IRQ_SKIP) {
- /* We use the interrupt num as h/w irq num */
- ret = direct_map_num;
- goto found;
- }
- }
-
- pr_err("%s: requested crossbar number %d > max %d\n",
- __func__, req_num, cb->max_crossbar_sources);
- return -EINVAL;
- }
-
- ret = get_prev_map_irq(req_num);
- if (ret >= 0)
- goto found;
-
- ret = allocate_free_irq(req_num);
-
- if (ret < 0)
- return ret;
-
-found:
- *out_hwirq = ret + GIC_IRQ_START;
+ if (d->of_node != controller)
+ return -EINVAL; /* Shouldn't happen, really... */
+ if (intsize != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (intspec[0] != 0)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ *out_hwirq = intspec[1];
+ *out_type = intspec[2];
return 0;
}
-static const struct irq_domain_ops routable_irq_domain_ops = {
- .map = crossbar_domain_map,
- .unmap = crossbar_domain_unmap,
- .xlate = crossbar_domain_xlate
+static const struct irq_domain_ops crossbar_domain_ops = {
+ .alloc = crossbar_domain_alloc,
+ .free = crossbar_domain_free,
+ .xlate = crossbar_domain_xlate,
};
static int __init crossbar_of_init(struct device_node *node)
@@ -293,7 +309,8 @@ static int __init crossbar_of_init(struct device_node *node)
cb->write(i, cb->safe_map);
}
- register_routable_domain_ops(&routable_irq_domain_ops);
+ raw_spin_lock_init(&cb->lock);
+
return 0;
err_reg_offset:
@@ -309,18 +326,37 @@ err_cb:
return ret;
}
-static const struct of_device_id crossbar_match[] __initconst = {
- { .compatible = "ti,irq-crossbar" },
- {}
-};
-
-int __init irqcrossbar_init(void)
+static int __init irqcrossbar_init(struct device_node *node,
+ struct device_node *parent)
{
- struct device_node *np;
- np = of_find_matching_node(NULL, crossbar_match);
- if (!np)
+ struct irq_domain *parent_domain, *domain;
+ int err;
+
+ if (!parent) {
+ pr_err("%s: no parent, giving up\n", node->full_name);
return -ENODEV;
+ }
+
+ parent_domain = irq_find_host(parent);
+ if (!parent_domain) {
+ pr_err("%s: unable to obtain parent domain\n", node->full_name);
+ return -ENXIO;
+ }
+
+ err = crossbar_of_init(node);
+ if (err)
+ return err;
+
+ domain = irq_domain_add_hierarchy(parent_domain, 0,
+ cb->max_crossbar_sources,
+ node, &crossbar_domain_ops,
+ NULL);
+ if (!domain) {
+ pr_err("%s: failed to allocated domain\n", node->full_name);
+ return -ENOMEM;
+ }
- crossbar_of_init(np);
return 0;
}
+
+IRQCHIP_DECLARE(ti_irqcrossbar, "ti,irq-crossbar", irqcrossbar_init);
diff --git a/drivers/irqchip/irq-digicolor.c b/drivers/irqchip/irq-digicolor.c
index 930a2a2fac7f..3cbc658afe27 100644
--- a/drivers/irqchip/irq-digicolor.c
+++ b/drivers/irqchip/irq-digicolor.c
@@ -55,8 +55,8 @@ static void __exception_irq_entry digicolor_handle_irq(struct pt_regs *regs)
} while (1);
}
-static void digicolor_set_gc(void __iomem *reg_base, unsigned irq_base,
- unsigned en_reg, unsigned ack_reg)
+static void __init digicolor_set_gc(void __iomem *reg_base, unsigned irq_base,
+ unsigned en_reg, unsigned ack_reg)
{
struct irq_chip_generic *gc;
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 072432c22207..61ffbbc92f37 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -349,7 +349,7 @@ static u8 gic_get_cpumask(struct gic_chip_data *gic)
break;
}
- if (!mask)
+ if (!mask && num_possible_cpus() > 1)
pr_crit("GIC CPU mask not found - kernel will fail to boot.\n");
return mask;
@@ -798,15 +798,12 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_domain_set_info(d, irq, hw, &gic_chip, d->host_data,
handle_fasteoi_irq, NULL, NULL);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
-
- gic_routable_irq_domain_ops->map(d, irq, hw);
}
return 0;
}
static void gic_irq_domain_unmap(struct irq_domain *d, unsigned int irq)
{
- gic_routable_irq_domain_ops->unmap(d, irq);
}
static int gic_irq_domain_xlate(struct irq_domain *d,
@@ -825,16 +822,8 @@ static int gic_irq_domain_xlate(struct irq_domain *d,
*out_hwirq = intspec[1] + 16;
/* For SPIs, we need to add 16 more to get the GIC irq ID number */
- if (!intspec[0]) {
- ret = gic_routable_irq_domain_ops->xlate(d, controller,
- intspec,
- intsize,
- out_hwirq,
- out_type);
-
- if (IS_ERR_VALUE(ret))
- return ret;
- }
+ if (!intspec[0])
+ *out_hwirq += 16;
*out_type = intspec[2] & IRQ_TYPE_SENSE_MASK;
@@ -891,37 +880,6 @@ static const struct irq_domain_ops gic_irq_domain_ops = {
.xlate = gic_irq_domain_xlate,
};
-/* Default functions for routable irq domain */
-static int gic_routable_irq_domain_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hw)
-{
- return 0;
-}
-
-static void gic_routable_irq_domain_unmap(struct irq_domain *d,
- unsigned int irq)
-{
-}
-
-static int gic_routable_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)
-{
- *out_hwirq += 16;
- return 0;
-}
-
-static const struct irq_domain_ops gic_default_routable_irq_domain_ops = {
- .map = gic_routable_irq_domain_map,
- .unmap = gic_routable_irq_domain_unmap,
- .xlate = gic_routable_irq_domain_xlate,
-};
-
-const struct irq_domain_ops *gic_routable_irq_domain_ops =
- &gic_default_routable_irq_domain_ops;
-
void gic_set_irqchip_flags(unsigned long flags)
{
gic_chip.flags |= flags;
@@ -934,7 +892,6 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start,
irq_hw_number_t hwirq_base;
struct gic_chip_data *gic;
int gic_irqs, irq_base, i;
- int nr_routable_irqs;
BUG_ON(gic_nr >= MAX_GIC_NR);
@@ -990,15 +947,9 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start,
gic->gic_irqs = gic_irqs;
if (node) { /* DT case */
- const struct irq_domain_ops *ops = &gic_irq_domain_hierarchy_ops;
-
- if (!of_property_read_u32(node, "arm,routable-irqs",
- &nr_routable_irqs)) {
- ops = &gic_irq_domain_ops;
- gic_irqs = nr_routable_irqs;
- }
-
- gic->domain = irq_domain_add_linear(node, gic_irqs, ops, gic);
+ gic->domain = irq_domain_add_linear(node, gic_irqs,
+ &gic_irq_domain_hierarchy_ops,
+ gic);
} else { /* Non-DT case */
/*
* For primary GICs, skip over SGIs.
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index 9acdc080e7ec..f2d269bca789 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -166,6 +166,27 @@ cycle_t gic_read_compare(void)
return (((cycle_t) hi) << 32) + lo;
}
+
+void gic_start_count(void)
+{
+ u32 gicconfig;
+
+ /* Start the counter */
+ gicconfig = gic_read(GIC_REG(SHARED, GIC_SH_CONFIG));
+ gicconfig &= ~(1 << GIC_SH_CONFIG_COUNTSTOP_SHF);
+ gic_write(GIC_REG(SHARED, GIC_SH_CONFIG), gicconfig);
+}
+
+void gic_stop_count(void)
+{
+ u32 gicconfig;
+
+ /* Stop the counter */
+ gicconfig = gic_read(GIC_REG(SHARED, GIC_SH_CONFIG));
+ gicconfig |= 1 << GIC_SH_CONFIG_COUNTSTOP_SHF;
+ gic_write(GIC_REG(SHARED, GIC_SH_CONFIG), gicconfig);
+}
+
#endif
static bool gic_local_irq_is_routable(int intr)
diff --git a/drivers/irqchip/irq-renesas-irqc.c b/drivers/irqchip/irq-renesas-irqc.c
index 384e6ed61d7c..cdf80b7794cd 100644
--- a/drivers/irqchip/irq-renesas-irqc.c
+++ b/drivers/irqchip/irq-renesas-irqc.c
@@ -17,6 +17,7 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include <linux/clk.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
@@ -29,15 +30,26 @@
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_data/irq-renesas-irqc.h>
+#include <linux/pm_runtime.h>
-#define IRQC_IRQ_MAX 32 /* maximum 32 interrupts per driver instance */
+#define IRQC_IRQ_MAX 32 /* maximum 32 interrupts per driver instance */
-#define IRQC_REQ_STS 0x00
-#define IRQC_EN_STS 0x04
-#define IRQC_EN_SET 0x08
+#define IRQC_REQ_STS 0x00 /* Interrupt Request Status Register */
+#define IRQC_EN_STS 0x04 /* Interrupt Enable Status Register */
+#define IRQC_EN_SET 0x08 /* Interrupt Enable Set Register */
#define IRQC_INT_CPU_BASE(n) (0x000 + ((n) * 0x10))
-#define DETECT_STATUS 0x100
+ /* SYS-CPU vs. RT-CPU */
+#define DETECT_STATUS 0x100 /* IRQn Detect Status Register */
+#define MONITOR 0x104 /* IRQn Signal Level Monitor Register */
+#define HLVL_STS 0x108 /* IRQn High Level Detect Status Register */
+#define LLVL_STS 0x10c /* IRQn Low Level Detect Status Register */
+#define S_R_EDGE_STS 0x110 /* IRQn Sync Rising Edge Detect Status Reg. */
+#define S_F_EDGE_STS 0x114 /* IRQn Sync Falling Edge Detect Status Reg. */
+#define A_R_EDGE_STS 0x118 /* IRQn Async Rising Edge Detect Status Reg. */
+#define A_F_EDGE_STS 0x11c /* IRQn Async Falling Edge Detect Status Reg. */
+#define CHTEN_STS 0x120 /* Chattering Reduction Status Register */
#define IRQC_CONFIG(n) (0x180 + ((n) * 0x04))
+ /* IRQn Configuration Register */
struct irqc_irq {
int hw_irq;
@@ -55,6 +67,7 @@ struct irqc_priv {
struct platform_device *pdev;
struct irq_chip irq_chip;
struct irq_domain *irq_domain;
+ struct clk *clk;
};
static void irqc_dbg(struct irqc_irq *i, char *str)
@@ -94,7 +107,7 @@ static int irqc_irq_set_type(struct irq_data *d, unsigned int type)
struct irqc_priv *p = irq_data_get_irq_chip_data(d);
int hw_irq = irqd_to_hwirq(d);
unsigned char value = irqc_sense[type & IRQ_TYPE_SENSE_MASK];
- unsigned long tmp;
+ u32 tmp;
irqc_dbg(&p->irq[hw_irq], "sense");
@@ -108,11 +121,26 @@ static int irqc_irq_set_type(struct irq_data *d, unsigned int type)
return 0;
}
+static int irqc_irq_set_wake(struct irq_data *d, unsigned int on)
+{
+ struct irqc_priv *p = irq_data_get_irq_chip_data(d);
+
+ if (!p->clk)
+ return 0;
+
+ if (on)
+ clk_enable(p->clk);
+ else
+ clk_disable(p->clk);
+
+ return 0;
+}
+
static irqreturn_t irqc_irq_handler(int irq, void *dev_id)
{
struct irqc_irq *i = dev_id;
struct irqc_priv *p = i->p;
- unsigned long bit = BIT(i->hw_irq);
+ u32 bit = BIT(i->hw_irq);
irqc_dbg(i, "demux1");
@@ -170,6 +198,15 @@ static int irqc_probe(struct platform_device *pdev)
p->pdev = pdev;
platform_set_drvdata(pdev, p);
+ p->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(p->clk)) {
+ dev_warn(&pdev->dev, "unable to get clock\n");
+ p->clk = NULL;
+ }
+
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_get_sync(&pdev->dev);
+
/* get hold of manadatory IOMEM */
io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!io) {
@@ -210,7 +247,8 @@ static int irqc_probe(struct platform_device *pdev)
irq_chip->irq_mask = irqc_irq_disable;
irq_chip->irq_unmask = irqc_irq_enable;
irq_chip->irq_set_type = irqc_irq_set_type;
- irq_chip->flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND;
+ irq_chip->irq_set_wake = irqc_irq_set_wake;
+ irq_chip->flags = IRQCHIP_MASK_ON_SUSPEND;
p->irq_domain = irq_domain_add_simple(pdev->dev.of_node,
p->number_of_irqs,
@@ -250,6 +288,8 @@ err3:
err2:
iounmap(p->iomem);
err1:
+ pm_runtime_put(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
kfree(p);
err0:
return ret;
@@ -265,6 +305,8 @@ static int irqc_remove(struct platform_device *pdev)
irq_domain_remove(p->irq_domain);
iounmap(p->iomem);
+ pm_runtime_put(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
kfree(p);
return 0;
}
diff --git a/drivers/irqchip/irq-st.c b/drivers/irqchip/irq-st.c
new file mode 100644
index 000000000000..9af48a85c16f
--- /dev/null
+++ b/drivers/irqchip/irq-st.c
@@ -0,0 +1,206 @@
+/*
+ * Copyright (C) 2014 STMicroelectronics – All Rights Reserved
+ *
+ * Author: Lee Jones <lee.jones@linaro.org>
+ *
+ * This is a re-write of Christophe Kerello's PMU driver.
+ *
+ * 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 <dt-bindings/interrupt-controller/irq-st.h>
+#include <linux/err.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#define STIH415_SYSCFG_642 0x0a8
+#define STIH416_SYSCFG_7543 0x87c
+#define STIH407_SYSCFG_5102 0x198
+#define STID127_SYSCFG_734 0x088
+
+#define ST_A9_IRQ_MASK 0x001FFFFF
+#define ST_A9_IRQ_MAX_CHANS 2
+
+#define ST_A9_IRQ_EN_CTI_0 BIT(0)
+#define ST_A9_IRQ_EN_CTI_1 BIT(1)
+#define ST_A9_IRQ_EN_PMU_0 BIT(2)
+#define ST_A9_IRQ_EN_PMU_1 BIT(3)
+#define ST_A9_IRQ_EN_PL310_L2 BIT(4)
+#define ST_A9_IRQ_EN_EXT_0 BIT(5)
+#define ST_A9_IRQ_EN_EXT_1 BIT(6)
+#define ST_A9_IRQ_EN_EXT_2 BIT(7)
+
+#define ST_A9_FIQ_N_SEL(dev, chan) (dev << (8 + (chan * 3)))
+#define ST_A9_IRQ_N_SEL(dev, chan) (dev << (14 + (chan * 3)))
+#define ST_A9_EXTIRQ_INV_SEL(dev) (dev << 20)
+
+struct st_irq_syscfg {
+ struct regmap *regmap;
+ unsigned int syscfg;
+ unsigned int config;
+ bool ext_inverted;
+};
+
+static const struct of_device_id st_irq_syscfg_match[] = {
+ {
+ .compatible = "st,stih415-irq-syscfg",
+ .data = (void *)STIH415_SYSCFG_642,
+ },
+ {
+ .compatible = "st,stih416-irq-syscfg",
+ .data = (void *)STIH416_SYSCFG_7543,
+ },
+ {
+ .compatible = "st,stih407-irq-syscfg",
+ .data = (void *)STIH407_SYSCFG_5102,
+ },
+ {
+ .compatible = "st,stid127-irq-syscfg",
+ .data = (void *)STID127_SYSCFG_734,
+ },
+ {}
+};
+
+static int st_irq_xlate(struct platform_device *pdev,
+ int device, int channel, bool irq)
+{
+ struct st_irq_syscfg *ddata = dev_get_drvdata(&pdev->dev);
+
+ /* Set the device enable bit. */
+ switch (device) {
+ case ST_IRQ_SYSCFG_EXT_0:
+ ddata->config |= ST_A9_IRQ_EN_EXT_0;
+ break;
+ case ST_IRQ_SYSCFG_EXT_1:
+ ddata->config |= ST_A9_IRQ_EN_EXT_1;
+ break;
+ case ST_IRQ_SYSCFG_EXT_2:
+ ddata->config |= ST_A9_IRQ_EN_EXT_2;
+ break;
+ case ST_IRQ_SYSCFG_CTI_0:
+ ddata->config |= ST_A9_IRQ_EN_CTI_0;
+ break;
+ case ST_IRQ_SYSCFG_CTI_1:
+ ddata->config |= ST_A9_IRQ_EN_CTI_1;
+ break;
+ case ST_IRQ_SYSCFG_PMU_0:
+ ddata->config |= ST_A9_IRQ_EN_PMU_0;
+ break;
+ case ST_IRQ_SYSCFG_PMU_1:
+ ddata->config |= ST_A9_IRQ_EN_PMU_1;
+ break;
+ case ST_IRQ_SYSCFG_pl310_L2:
+ ddata->config |= ST_A9_IRQ_EN_PL310_L2;
+ break;
+ case ST_IRQ_SYSCFG_DISABLED:
+ return 0;
+ default:
+ dev_err(&pdev->dev, "Unrecognised device %d\n", device);
+ return -EINVAL;
+ }
+
+ /* Select IRQ/FIQ channel for device. */
+ ddata->config |= irq ?
+ ST_A9_IRQ_N_SEL(device, channel) :
+ ST_A9_FIQ_N_SEL(device, channel);
+
+ return 0;
+}
+
+static int st_irq_syscfg_enable(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct st_irq_syscfg *ddata = dev_get_drvdata(&pdev->dev);
+ int channels, ret, i;
+ u32 device, invert;
+
+ channels = of_property_count_u32_elems(np, "st,irq-device");
+ if (channels != ST_A9_IRQ_MAX_CHANS) {
+ dev_err(&pdev->dev, "st,enable-irq-device must have 2 elems\n");
+ return -EINVAL;
+ }
+
+ channels = of_property_count_u32_elems(np, "st,fiq-device");
+ if (channels != ST_A9_IRQ_MAX_CHANS) {
+ dev_err(&pdev->dev, "st,enable-fiq-device must have 2 elems\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < ST_A9_IRQ_MAX_CHANS; i++) {
+ of_property_read_u32_index(np, "st,irq-device", i, &device);
+
+ ret = st_irq_xlate(pdev, device, i, true);
+ if (ret)
+ return ret;
+
+ of_property_read_u32_index(np, "st,fiq-device", i, &device);
+
+ ret = st_irq_xlate(pdev, device, i, false);
+ if (ret)
+ return ret;
+ }
+
+ /* External IRQs may be inverted. */
+ of_property_read_u32(np, "st,invert-ext", &invert);
+ ddata->config |= ST_A9_EXTIRQ_INV_SEL(invert);
+
+ return regmap_update_bits(ddata->regmap, ddata->syscfg,
+ ST_A9_IRQ_MASK, ddata->config);
+}
+
+static int st_irq_syscfg_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ const struct of_device_id *match;
+ struct st_irq_syscfg *ddata;
+
+ ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ match = of_match_device(st_irq_syscfg_match, &pdev->dev);
+ if (!match)
+ return -ENODEV;
+
+ ddata->syscfg = (unsigned int)match->data;
+
+ ddata->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
+ if (IS_ERR(ddata->regmap)) {
+ dev_err(&pdev->dev, "syscfg phandle missing\n");
+ return PTR_ERR(ddata->regmap);
+ }
+
+ dev_set_drvdata(&pdev->dev, ddata);
+
+ return st_irq_syscfg_enable(pdev);
+}
+
+static int st_irq_syscfg_resume(struct device *dev)
+{
+ struct st_irq_syscfg *ddata = dev_get_drvdata(dev);
+
+ return regmap_update_bits(ddata->regmap, ddata->syscfg,
+ ST_A9_IRQ_MASK, ddata->config);
+}
+
+static SIMPLE_DEV_PM_OPS(st_irq_syscfg_pm_ops, NULL, st_irq_syscfg_resume);
+
+static struct platform_driver st_irq_syscfg_driver = {
+ .driver = {
+ .name = "st_irq_syscfg",
+ .pm = &st_irq_syscfg_pm_ops,
+ .of_match_table = st_irq_syscfg_match,
+ },
+ .probe = st_irq_syscfg_probe,
+};
+
+static int __init st_irq_syscfg_init(void)
+{
+ return platform_driver_register(&st_irq_syscfg_driver);
+}
+core_initcall(st_irq_syscfg_init);
diff --git a/drivers/irqchip/irq-tegra.c b/drivers/irqchip/irq-tegra.c
new file mode 100644
index 000000000000..51c485d9a877
--- /dev/null
+++ b/drivers/irqchip/irq-tegra.c
@@ -0,0 +1,377 @@
+/*
+ * Driver code for Tegra's Legacy Interrupt Controller
+ *
+ * Author: Marc Zyngier <marc.zyngier@arm.com>
+ *
+ * Heavily based on the original arch/arm/mach-tegra/irq.c code:
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * Author:
+ * Colin Cross <ccross@android.com>
+ *
+ * Copyright (C) 2010,2013, NVIDIA Corporation
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/syscore_ops.h>
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+#include "irqchip.h"
+
+#define ICTLR_CPU_IEP_VFIQ 0x08
+#define ICTLR_CPU_IEP_FIR 0x14
+#define ICTLR_CPU_IEP_FIR_SET 0x18
+#define ICTLR_CPU_IEP_FIR_CLR 0x1c
+
+#define ICTLR_CPU_IER 0x20
+#define ICTLR_CPU_IER_SET 0x24
+#define ICTLR_CPU_IER_CLR 0x28
+#define ICTLR_CPU_IEP_CLASS 0x2C
+
+#define ICTLR_COP_IER 0x30
+#define ICTLR_COP_IER_SET 0x34
+#define ICTLR_COP_IER_CLR 0x38
+#define ICTLR_COP_IEP_CLASS 0x3c
+
+#define TEGRA_MAX_NUM_ICTLRS 6
+
+static unsigned int num_ictlrs;
+
+struct tegra_ictlr_soc {
+ unsigned int num_ictlrs;
+};
+
+static const struct tegra_ictlr_soc tegra20_ictlr_soc = {
+ .num_ictlrs = 4,
+};
+
+static const struct tegra_ictlr_soc tegra30_ictlr_soc = {
+ .num_ictlrs = 5,
+};
+
+static const struct tegra_ictlr_soc tegra210_ictlr_soc = {
+ .num_ictlrs = 6,
+};
+
+static const struct of_device_id ictlr_matches[] = {
+ { .compatible = "nvidia,tegra210-ictlr", .data = &tegra210_ictlr_soc },
+ { .compatible = "nvidia,tegra30-ictlr", .data = &tegra30_ictlr_soc },
+ { .compatible = "nvidia,tegra20-ictlr", .data = &tegra20_ictlr_soc },
+ { }
+};
+
+struct tegra_ictlr_info {
+ void __iomem *base[TEGRA_MAX_NUM_ICTLRS];
+#ifdef CONFIG_PM_SLEEP
+ u32 cop_ier[TEGRA_MAX_NUM_ICTLRS];
+ u32 cop_iep[TEGRA_MAX_NUM_ICTLRS];
+ u32 cpu_ier[TEGRA_MAX_NUM_ICTLRS];
+ u32 cpu_iep[TEGRA_MAX_NUM_ICTLRS];
+
+ u32 ictlr_wake_mask[TEGRA_MAX_NUM_ICTLRS];
+#endif
+};
+
+static struct tegra_ictlr_info *lic;
+
+static inline void tegra_ictlr_write_mask(struct irq_data *d, unsigned long reg)
+{
+ void __iomem *base = d->chip_data;
+ u32 mask;
+
+ mask = BIT(d->hwirq % 32);
+ writel_relaxed(mask, base + reg);
+}
+
+static void tegra_mask(struct irq_data *d)
+{
+ tegra_ictlr_write_mask(d, ICTLR_CPU_IER_CLR);
+ irq_chip_mask_parent(d);
+}
+
+static void tegra_unmask(struct irq_data *d)
+{
+ tegra_ictlr_write_mask(d, ICTLR_CPU_IER_SET);
+ irq_chip_unmask_parent(d);
+}
+
+static void tegra_eoi(struct irq_data *d)
+{
+ tegra_ictlr_write_mask(d, ICTLR_CPU_IEP_FIR_CLR);
+ irq_chip_eoi_parent(d);
+}
+
+static int tegra_retrigger(struct irq_data *d)
+{
+ tegra_ictlr_write_mask(d, ICTLR_CPU_IEP_FIR_SET);
+ return irq_chip_retrigger_hierarchy(d);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tegra_set_wake(struct irq_data *d, unsigned int enable)
+{
+ u32 irq = d->hwirq;
+ u32 index, mask;
+
+ index = (irq / 32);
+ mask = BIT(irq % 32);
+ if (enable)
+ lic->ictlr_wake_mask[index] |= mask;
+ else
+ lic->ictlr_wake_mask[index] &= ~mask;
+
+ /*
+ * Do *not* call into the parent, as the GIC doesn't have any
+ * wake-up facility...
+ */
+ return 0;
+}
+
+static int tegra_ictlr_suspend(void)
+{
+ unsigned long flags;
+ unsigned int i;
+
+ local_irq_save(flags);
+ for (i = 0; i < num_ictlrs; i++) {
+ void __iomem *ictlr = lic->base[i];
+
+ /* Save interrupt state */
+ lic->cpu_ier[i] = readl_relaxed(ictlr + ICTLR_CPU_IER);
+ lic->cpu_iep[i] = readl_relaxed(ictlr + ICTLR_CPU_IEP_CLASS);
+ lic->cop_ier[i] = readl_relaxed(ictlr + ICTLR_COP_IER);
+ lic->cop_iep[i] = readl_relaxed(ictlr + ICTLR_COP_IEP_CLASS);
+
+ /* Disable COP interrupts */
+ writel_relaxed(~0ul, ictlr + ICTLR_COP_IER_CLR);
+
+ /* Disable CPU interrupts */
+ writel_relaxed(~0ul, ictlr + ICTLR_CPU_IER_CLR);
+
+ /* Enable the wakeup sources of ictlr */
+ writel_relaxed(lic->ictlr_wake_mask[i], ictlr + ICTLR_CPU_IER_SET);
+ }
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+static void tegra_ictlr_resume(void)
+{
+ unsigned long flags;
+ unsigned int i;
+
+ local_irq_save(flags);
+ for (i = 0; i < num_ictlrs; i++) {
+ void __iomem *ictlr = lic->base[i];
+
+ writel_relaxed(lic->cpu_iep[i],
+ ictlr + ICTLR_CPU_IEP_CLASS);
+ writel_relaxed(~0ul, ictlr + ICTLR_CPU_IER_CLR);
+ writel_relaxed(lic->cpu_ier[i],
+ ictlr + ICTLR_CPU_IER_SET);
+ writel_relaxed(lic->cop_iep[i],
+ ictlr + ICTLR_COP_IEP_CLASS);
+ writel_relaxed(~0ul, ictlr + ICTLR_COP_IER_CLR);
+ writel_relaxed(lic->cop_ier[i],
+ ictlr + ICTLR_COP_IER_SET);
+ }
+ local_irq_restore(flags);
+}
+
+static struct syscore_ops tegra_ictlr_syscore_ops = {
+ .suspend = tegra_ictlr_suspend,
+ .resume = tegra_ictlr_resume,
+};
+
+static void tegra_ictlr_syscore_init(void)
+{
+ register_syscore_ops(&tegra_ictlr_syscore_ops);
+}
+#else
+#define tegra_set_wake NULL
+static inline void tegra_ictlr_syscore_init(void) {}
+#endif
+
+static struct irq_chip tegra_ictlr_chip = {
+ .name = "LIC",
+ .irq_eoi = tegra_eoi,
+ .irq_mask = tegra_mask,
+ .irq_unmask = tegra_unmask,
+ .irq_retrigger = tegra_retrigger,
+ .irq_set_wake = tegra_set_wake,
+ .flags = IRQCHIP_MASK_ON_SUSPEND,
+#ifdef CONFIG_SMP
+ .irq_set_affinity = irq_chip_set_affinity_parent,
+#endif
+};
+
+static int tegra_ictlr_domain_xlate(struct irq_domain *domain,
+ struct device_node *controller,
+ const u32 *intspec,
+ unsigned int intsize,
+ unsigned long *out_hwirq,
+ unsigned int *out_type)
+{
+ if (domain->of_node != controller)
+ return -EINVAL; /* Shouldn't happen, really... */
+ if (intsize != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (intspec[0] != GIC_SPI)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ *out_hwirq = intspec[1];
+ *out_type = intspec[2];
+ return 0;
+}
+
+static int tegra_ictlr_domain_alloc(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs, void *data)
+{
+ struct of_phandle_args *args = data;
+ struct of_phandle_args parent_args;
+ struct tegra_ictlr_info *info = domain->host_data;
+ irq_hw_number_t hwirq;
+ unsigned int i;
+
+ if (args->args_count != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (args->args[0] != GIC_SPI)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ hwirq = args->args[1];
+ if (hwirq >= (num_ictlrs * 32))
+ return -EINVAL;
+
+ for (i = 0; i < nr_irqs; i++) {
+ int ictlr = (hwirq + i) / 32;
+
+ irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
+ &tegra_ictlr_chip,
+ &info->base[ictlr]);
+ }
+
+ parent_args = *args;
+ parent_args.np = domain->parent->of_node;
+ return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &parent_args);
+}
+
+static void tegra_ictlr_domain_free(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs)
+{
+ unsigned int i;
+
+ for (i = 0; i < nr_irqs; i++) {
+ struct irq_data *d = irq_domain_get_irq_data(domain, virq + i);
+ irq_domain_reset_irq_data(d);
+ }
+}
+
+static const struct irq_domain_ops tegra_ictlr_domain_ops = {
+ .xlate = tegra_ictlr_domain_xlate,
+ .alloc = tegra_ictlr_domain_alloc,
+ .free = tegra_ictlr_domain_free,
+};
+
+static int __init tegra_ictlr_init(struct device_node *node,
+ struct device_node *parent)
+{
+ struct irq_domain *parent_domain, *domain;
+ const struct of_device_id *match;
+ const struct tegra_ictlr_soc *soc;
+ unsigned int i;
+ int err;
+
+ if (!parent) {
+ pr_err("%s: no parent, giving up\n", node->full_name);
+ return -ENODEV;
+ }
+
+ parent_domain = irq_find_host(parent);
+ if (!parent_domain) {
+ pr_err("%s: unable to obtain parent domain\n", node->full_name);
+ return -ENXIO;
+ }
+
+ match = of_match_node(ictlr_matches, node);
+ if (!match) /* Should never happen... */
+ return -ENODEV;
+
+ soc = match->data;
+
+ lic = kzalloc(sizeof(*lic), GFP_KERNEL);
+ if (!lic)
+ return -ENOMEM;
+
+ for (i = 0; i < TEGRA_MAX_NUM_ICTLRS; i++) {
+ void __iomem *base;
+
+ base = of_iomap(node, i);
+ if (!base)
+ break;
+
+ lic->base[i] = base;
+
+ /* Disable all interrupts */
+ writel_relaxed(~0UL, base + ICTLR_CPU_IER_CLR);
+ /* All interrupts target IRQ */
+ writel_relaxed(0, base + ICTLR_CPU_IEP_CLASS);
+
+ num_ictlrs++;
+ }
+
+ if (!num_ictlrs) {
+ pr_err("%s: no valid regions, giving up\n", node->full_name);
+ err = -ENOMEM;
+ goto out_free;
+ }
+
+ WARN(num_ictlrs != soc->num_ictlrs,
+ "%s: Found %u interrupt controllers in DT; expected %u.\n",
+ node->full_name, num_ictlrs, soc->num_ictlrs);
+
+
+ domain = irq_domain_add_hierarchy(parent_domain, 0, num_ictlrs * 32,
+ node, &tegra_ictlr_domain_ops,
+ lic);
+ if (!domain) {
+ pr_err("%s: failed to allocated domain\n", node->full_name);
+ err = -ENOMEM;
+ goto out_unmap;
+ }
+
+ tegra_ictlr_syscore_init();
+
+ pr_info("%s: %d interrupts forwarded to %s\n",
+ node->full_name, num_ictlrs * 32, parent->full_name);
+
+ return 0;
+
+out_unmap:
+ for (i = 0; i < num_ictlrs; i++)
+ iounmap(lic->base[i]);
+out_free:
+ kfree(lic);
+ return err;
+}
+
+IRQCHIP_DECLARE(tegra20_ictlr, "nvidia,tegra20-ictlr", tegra_ictlr_init);
+IRQCHIP_DECLARE(tegra30_ictlr, "nvidia,tegra30-ictlr", tegra_ictlr_init);
+IRQCHIP_DECLARE(tegra210_ictlr, "nvidia,tegra210-ictlr", tegra_ictlr_init);
diff --git a/drivers/irqchip/irq-vf610-mscm-ir.c b/drivers/irqchip/irq-vf610-mscm-ir.c
new file mode 100644
index 000000000000..9521057d4744
--- /dev/null
+++ b/drivers/irqchip/irq-vf610-mscm-ir.c
@@ -0,0 +1,212 @@
+/*
+ * Copyright (C) 2014-2015 Toradex AG
+ * Author: Stefan Agner <stefan@agner.ch>
+ *
+ * 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.
+ *
+ *
+ * IRQ chip driver for MSCM interrupt router available on Vybrid SoC's.
+ * The interrupt router is between the CPU's interrupt controller and the
+ * peripheral. The router allows to route the peripheral interrupts to
+ * one of the two available CPU's on Vybrid VF6xx SoC's (Cortex-A5 or
+ * Cortex-M4). The router will be configured transparently on a IRQ
+ * request.
+ *
+ * o All peripheral interrupts of the Vybrid SoC can be routed to
+ * CPU 0, CPU 1 or both. The routing is useful for dual-core
+ * variants of Vybrid SoC such as VF6xx. This driver routes the
+ * requested interrupt to the CPU currently running on.
+ *
+ * o It is required to setup the interrupt router even on single-core
+ * variants of Vybrid.
+ */
+
+#include <linux/cpu_pm.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/mfd/syscon.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+
+#include "irqchip.h"
+
+#define MSCM_CPxNUM 0x4
+
+#define MSCM_IRSPRC(n) (0x80 + 2 * (n))
+#define MSCM_IRSPRC_CPEN_MASK 0x3
+
+#define MSCM_IRSPRC_NUM 112
+
+struct vf610_mscm_ir_chip_data {
+ void __iomem *mscm_ir_base;
+ u16 cpu_mask;
+ u16 saved_irsprc[MSCM_IRSPRC_NUM];
+};
+
+static struct vf610_mscm_ir_chip_data *mscm_ir_data;
+
+static inline void vf610_mscm_ir_save(struct vf610_mscm_ir_chip_data *data)
+{
+ int i;
+
+ for (i = 0; i < MSCM_IRSPRC_NUM; i++)
+ data->saved_irsprc[i] = readw_relaxed(data->mscm_ir_base + MSCM_IRSPRC(i));
+}
+
+static inline void vf610_mscm_ir_restore(struct vf610_mscm_ir_chip_data *data)
+{
+ int i;
+
+ for (i = 0; i < MSCM_IRSPRC_NUM; i++)
+ writew_relaxed(data->saved_irsprc[i], data->mscm_ir_base + MSCM_IRSPRC(i));
+}
+
+static int vf610_mscm_ir_notifier(struct notifier_block *self,
+ unsigned long cmd, void *v)
+{
+ switch (cmd) {
+ case CPU_CLUSTER_PM_ENTER:
+ vf610_mscm_ir_save(mscm_ir_data);
+ break;
+ case CPU_CLUSTER_PM_ENTER_FAILED:
+ case CPU_CLUSTER_PM_EXIT:
+ vf610_mscm_ir_restore(mscm_ir_data);
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block mscm_ir_notifier_block = {
+ .notifier_call = vf610_mscm_ir_notifier,
+};
+
+static void vf610_mscm_ir_enable(struct irq_data *data)
+{
+ irq_hw_number_t hwirq = data->hwirq;
+ struct vf610_mscm_ir_chip_data *chip_data = data->chip_data;
+ u16 irsprc;
+
+ irsprc = readw_relaxed(chip_data->mscm_ir_base + MSCM_IRSPRC(hwirq));
+ irsprc &= MSCM_IRSPRC_CPEN_MASK;
+
+ WARN_ON(irsprc & ~chip_data->cpu_mask);
+
+ writew_relaxed(chip_data->cpu_mask,
+ chip_data->mscm_ir_base + MSCM_IRSPRC(hwirq));
+
+ irq_chip_unmask_parent(data);
+}
+
+static void vf610_mscm_ir_disable(struct irq_data *data)
+{
+ irq_hw_number_t hwirq = data->hwirq;
+ struct vf610_mscm_ir_chip_data *chip_data = data->chip_data;
+
+ writew_relaxed(0x0, chip_data->mscm_ir_base + MSCM_IRSPRC(hwirq));
+
+ irq_chip_mask_parent(data);
+}
+
+static struct irq_chip vf610_mscm_ir_irq_chip = {
+ .name = "mscm-ir",
+ .irq_mask = irq_chip_mask_parent,
+ .irq_unmask = irq_chip_unmask_parent,
+ .irq_eoi = irq_chip_eoi_parent,
+ .irq_enable = vf610_mscm_ir_enable,
+ .irq_disable = vf610_mscm_ir_disable,
+ .irq_retrigger = irq_chip_retrigger_hierarchy,
+ .irq_set_affinity = irq_chip_set_affinity_parent,
+};
+
+static int vf610_mscm_ir_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs, void *arg)
+{
+ int i;
+ irq_hw_number_t hwirq;
+ struct of_phandle_args *irq_data = arg;
+ struct of_phandle_args gic_data;
+
+ if (irq_data->args_count != 2)
+ return -EINVAL;
+
+ hwirq = irq_data->args[0];
+ for (i = 0; i < nr_irqs; i++)
+ irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
+ &vf610_mscm_ir_irq_chip,
+ domain->host_data);
+
+ gic_data.np = domain->parent->of_node;
+ gic_data.args_count = 3;
+ gic_data.args[0] = GIC_SPI;
+ gic_data.args[1] = irq_data->args[0];
+ gic_data.args[2] = irq_data->args[1];
+ return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &gic_data);
+}
+
+static const struct irq_domain_ops mscm_irq_domain_ops = {
+ .xlate = irq_domain_xlate_twocell,
+ .alloc = vf610_mscm_ir_domain_alloc,
+ .free = irq_domain_free_irqs_common,
+};
+
+static int __init vf610_mscm_ir_of_init(struct device_node *node,
+ struct device_node *parent)
+{
+ struct irq_domain *domain, *domain_parent;
+ struct regmap *mscm_cp_regmap;
+ int ret, cpuid;
+
+ domain_parent = irq_find_host(parent);
+ if (!domain_parent) {
+ pr_err("vf610_mscm_ir: interrupt-parent not found\n");
+ return -EINVAL;
+ }
+
+ mscm_ir_data = kzalloc(sizeof(*mscm_ir_data), GFP_KERNEL);
+ if (!mscm_ir_data)
+ return -ENOMEM;
+
+ mscm_ir_data->mscm_ir_base = of_io_request_and_map(node, 0, "mscm-ir");
+
+ if (!mscm_ir_data->mscm_ir_base) {
+ pr_err("vf610_mscm_ir: unable to map mscm register\n");
+ ret = -ENOMEM;
+ goto out_free;
+ }
+
+ mscm_cp_regmap = syscon_regmap_lookup_by_phandle(node, "fsl,cpucfg");
+ if (IS_ERR(mscm_cp_regmap)) {
+ ret = PTR_ERR(mscm_cp_regmap);
+ pr_err("vf610_mscm_ir: regmap lookup for cpucfg failed\n");
+ goto out_unmap;
+ }
+
+ regmap_read(mscm_cp_regmap, MSCM_CPxNUM, &cpuid);
+ mscm_ir_data->cpu_mask = 0x1 << cpuid;
+
+ domain = irq_domain_add_hierarchy(domain_parent, 0,
+ MSCM_IRSPRC_NUM, node,
+ &mscm_irq_domain_ops, mscm_ir_data);
+ if (!domain) {
+ ret = -ENOMEM;
+ goto out_unmap;
+ }
+
+ cpu_pm_register_notifier(&mscm_ir_notifier_block);
+
+ return 0;
+
+out_unmap:
+ iounmap(mscm_ir_data->mscm_ir_base);
+out_free:
+ kfree(mscm_ir_data);
+ return ret;
+}
+IRQCHIP_DECLARE(vf610_mscm_ir, "fsl,vf610-mscm-ir", vf610_mscm_ir_of_init);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 09:08:58 +0000