ARM: mach-shmobile: Use common INTC IRQ code on sh73a0
Improve IRQ triggering support by making use of the macro
INTC_IRQ_PINS_32() for INTCA on sh73a0. Unfortunately it
is not as easy as just using the macro as-is, we need to
do mask and unmaks in the GIC but configure other bits
and ack in INTCA. Update GPIO IRQ mappings while at it.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/arm/mach-shmobile/intc-sh73a0.c b/arch/arm/mach-shmobile/intc-sh73a0.c
index a911a60..836e815 100644
--- a/arch/arm/mach-shmobile/intc-sh73a0.c
+++ b/arch/arm/mach-shmobile/intc-sh73a0.c
@@ -22,6 +22,7 @@
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/sh_intc.h>
+#include <mach/intc.h>
#include <asm/hardware/gic.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@@ -255,20 +256,141 @@
return 0; /* always allow wakeup */
}
+#define RELOC_BASE 0x1000
+
+/* INTCA IRQ pins at INTCS + 0x1000 to make space for GIC+INTC handling */
+#define INTCS_VECT_RELOC(n, vect) INTCS_VECT((n), (vect) + RELOC_BASE)
+
+INTC_IRQ_PINS_32(intca_irq_pins, 0xe6900000,
+ INTCS_VECT_RELOC, "sh73a0-intca-irq-pins");
+
+static int to_gic_irq(struct irq_data *data)
+{
+ unsigned int vect = irq2evt(data->irq) - INTCS_VECT_BASE;
+
+ if (vect >= 0x3200)
+ vect -= 0x3000;
+ else
+ vect -= 0x0200;
+
+ return gic_spi((vect >> 5) + 1);
+}
+
+static int to_intca_reloc_irq(struct irq_data *data)
+{
+ return data->irq + (RELOC_BASE >> 5);
+}
+
+#define irq_cb(cb, irq) irq_get_chip(irq)->cb(irq_get_irq_data(irq))
+#define irq_cbp(cb, irq, p...) irq_get_chip(irq)->cb(irq_get_irq_data(irq), p)
+
+static void intca_gic_enable(struct irq_data *data)
+{
+ irq_cb(irq_unmask, to_intca_reloc_irq(data));
+ irq_cb(irq_unmask, to_gic_irq(data));
+}
+
+static void intca_gic_disable(struct irq_data *data)
+{
+ irq_cb(irq_mask, to_gic_irq(data));
+ irq_cb(irq_mask, to_intca_reloc_irq(data));
+}
+
+static void intca_gic_mask_ack(struct irq_data *data)
+{
+ irq_cb(irq_mask, to_gic_irq(data));
+ irq_cb(irq_mask_ack, to_intca_reloc_irq(data));
+}
+
+static void intca_gic_eoi(struct irq_data *data)
+{
+ irq_cb(irq_eoi, to_gic_irq(data));
+}
+
+static int intca_gic_set_type(struct irq_data *data, unsigned int type)
+{
+ return irq_cbp(irq_set_type, to_intca_reloc_irq(data), type);
+}
+
+static int intca_gic_set_wake(struct irq_data *data, unsigned int on)
+{
+ return irq_cbp(irq_set_wake, to_intca_reloc_irq(data), on);
+}
+
+#ifdef CONFIG_SMP
+static int intca_gic_set_affinity(struct irq_data *data,
+ const struct cpumask *cpumask,
+ bool force)
+{
+ return irq_cbp(irq_set_affinity, to_gic_irq(data), cpumask, force);
+}
+#endif
+
+struct irq_chip intca_gic_irq_chip = {
+ .name = "INTCA-GIC",
+ .irq_mask = intca_gic_disable,
+ .irq_unmask = intca_gic_enable,
+ .irq_mask_ack = intca_gic_mask_ack,
+ .irq_eoi = intca_gic_eoi,
+ .irq_enable = intca_gic_enable,
+ .irq_disable = intca_gic_disable,
+ .irq_shutdown = intca_gic_disable,
+ .irq_set_type = intca_gic_set_type,
+ .irq_set_wake = intca_gic_set_wake,
+#ifdef CONFIG_SMP
+ .irq_set_affinity = intca_gic_set_affinity,
+#endif
+};
+
+static int to_intc_vect(int irq)
+{
+ unsigned int irq_pin = irq - gic_spi(1);
+ unsigned int offs;
+
+ if (irq_pin < 16)
+ offs = 0x0200;
+ else
+ offs = 0x3000;
+
+ return offs + (irq_pin << 5);
+}
+
+static irqreturn_t sh73a0_irq_pin_demux(int irq, void *dev_id)
+{
+ generic_handle_irq(intcs_evt2irq(to_intc_vect(irq)));
+ return IRQ_HANDLED;
+}
+
+static struct irqaction sh73a0_irq_pin_cascade[32];
+
void __init sh73a0_init_irq(void)
{
void __iomem *gic_dist_base = __io(0xf0001000);
void __iomem *gic_cpu_base = __io(0xf0000100);
void __iomem *intevtsa = ioremap_nocache(0xffd20100, PAGE_SIZE);
+ int k, n;
gic_init(0, 29, gic_dist_base, gic_cpu_base);
gic_arch_extn.irq_set_wake = sh73a0_set_wake;
register_intc_controller(&intcs_desc);
+ register_intc_controller(&intca_irq_pins_desc);
/* demux using INTEVTSA */
sh73a0_intcs_cascade.name = "INTCS cascade";
sh73a0_intcs_cascade.handler = sh73a0_intcs_demux;
sh73a0_intcs_cascade.dev_id = intevtsa;
setup_irq(gic_spi(50), &sh73a0_intcs_cascade);
+
+ /* IRQ pins require special handling through INTCA and GIC */
+ for (k = 0; k < 32; k++) {
+ sh73a0_irq_pin_cascade[k].name = "INTCA-GIC cascade";
+ sh73a0_irq_pin_cascade[k].handler = sh73a0_irq_pin_demux;
+ setup_irq(gic_spi(1 + k), &sh73a0_irq_pin_cascade[k]);
+
+ n = intcs_evt2irq(to_intc_vect(gic_spi(1 + k)));
+ irq_set_chip_and_handler_name(n, &intca_gic_irq_chip,
+ handle_level_irq, "level");
+ set_irq_flags(n, IRQF_VALID); /* yuck */
+ }
}