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Message-Id: <1547830371-22122-1-git-send-email-guoren@kernel.org>
Date: Sat, 19 Jan 2019 00:52:50 +0800
From: guoren@...nel.org
To: tglx@...utronix.de, jason@...edaemon.net, marc.zyngier@....com,
robh+dt@...nel.org, mark.rutland@....com
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
guoren@...nel.org, Guo Ren <ren_guo@...ky.com>
Subject: [PATCH V2 1/2] irqchip/irq-csky-mpintc: Add triger type and priority
From: Guo Ren <ren_guo@...ky.com>
Support 4 triger types:
- IRQ_TYPE_LEVEL_HIGH
- IRQ_TYPE_LEVEL_LOW
- IRQ_TYPE_EDGE_RISING
- IRQ_TYPE_EDGE_FALLING
Support 0-255 priority setting for each irq.
Changelog:
- Fixup this_cpu_read() preempted problem.
- Optimize the coding style.
Signed-off-by: Guo Ren <ren_guo@...ky.com>
Cc: Marc Zyngier <marc.zyngier@....com>
---
drivers/irqchip/irq-csky-mpintc.c | 105 +++++++++++++++++++++++++++++++++++++-
1 file changed, 104 insertions(+), 1 deletion(-)
diff --git a/drivers/irqchip/irq-csky-mpintc.c b/drivers/irqchip/irq-csky-mpintc.c
index 99d3f3f..07a3752 100644
--- a/drivers/irqchip/irq-csky-mpintc.c
+++ b/drivers/irqchip/irq-csky-mpintc.c
@@ -17,6 +17,7 @@
#include <asm/reg_ops.h>
static struct irq_domain *root_domain;
+
static void __iomem *INTCG_base;
static void __iomem *INTCL_base;
@@ -29,9 +30,12 @@ static void __iomem *INTCL_base;
#define INTCG_ICTLR 0x0
#define INTCG_CICFGR 0x100
+#define INTCG_CIPRTR 0x200
#define INTCG_CIDSTR 0x1000
#define INTCL_PICTLR 0x0
+#define INTCL_CFGR 0x14
+#define INTCL_PRTR 0x20
#define INTCL_SIGR 0x60
#define INTCL_RDYIR 0x6c
#define INTCL_SENR 0xa0
@@ -40,6 +44,51 @@ static void __iomem *INTCL_base;
static DEFINE_PER_CPU(void __iomem *, intcl_reg);
+static unsigned long *__trigger;
+static unsigned long *__priority;
+
+#define IRQ_OFFSET(irq) ((irq < COMM_IRQ_BASE) ? irq : (irq - COMM_IRQ_BASE))
+
+#define TRIG_BYTE_OFFSET(i) ((((i) * 2) / 32) * 4)
+#define TRIG_BIT_OFFSET(i) (((i) * 2) % 32)
+
+#define PRI_BYTE_OFFSET(i) ((((i) * 8) / 32) * 4)
+#define PRI_BIT_OFFSET(i) (((i) * 8) % 32)
+
+#define TRIG_VAL(trigger, irq) (trigger << TRIG_BIT_OFFSET(IRQ_OFFSET(irq)))
+#define TRIG_VAL_MSK(irq) (~(3 << TRIG_BIT_OFFSET(IRQ_OFFSET(irq))))
+#define PRI_VAL(priority, irq) (priority << PRI_BIT_OFFSET(IRQ_OFFSET(irq)))
+#define PRI_VAL_MSK(irq) (~(0xff << PRI_BIT_OFFSET(IRQ_OFFSET(irq))))
+
+#define TRIG_BASE(irq) \
+ (TRIG_BYTE_OFFSET(IRQ_OFFSET(irq)) + ((irq < COMM_IRQ_BASE) ? \
+ (this_cpu_read(intcl_reg) + INTCL_CFGR) : (INTCG_base + INTCG_CICFGR)))
+
+#define PRI_BASE(irq) \
+ (PRI_BYTE_OFFSET(IRQ_OFFSET(irq)) + ((irq < COMM_IRQ_BASE) ? \
+ (this_cpu_read(intcl_reg) + INTCL_PRTR) : (INTCG_base + INTCG_CIPRTR)))
+
+static DEFINE_SPINLOCK(setup_lock);
+static void setup_trigger_priority(unsigned long irq, unsigned long trigger,
+ unsigned long priority)
+{
+ unsigned int tmp;
+
+ spin_lock(&setup_lock);
+
+ /* setup trigger */
+ tmp = readl_relaxed(TRIG_BASE(irq)) & TRIG_VAL_MSK(irq);
+
+ writel_relaxed(tmp | TRIG_VAL(trigger, irq), TRIG_BASE(irq));
+
+ /* setup priority */
+ tmp = readl_relaxed(PRI_BASE(irq)) & PRI_VAL_MSK(irq);
+
+ writel_relaxed(tmp | PRI_VAL(priority, irq), PRI_BASE(irq));
+
+ spin_unlock(&setup_lock);
+}
+
static void csky_mpintc_handler(struct pt_regs *regs)
{
void __iomem *reg_base = this_cpu_read(intcl_reg);
@@ -52,6 +101,9 @@ static void csky_mpintc_enable(struct irq_data *d)
{
void __iomem *reg_base = this_cpu_read(intcl_reg);
+ setup_trigger_priority(d->hwirq, __trigger[d->hwirq],
+ __priority[d->hwirq]);
+
writel_relaxed(d->hwirq, reg_base + INTCL_SENR);
}
@@ -69,6 +121,28 @@ static void csky_mpintc_eoi(struct irq_data *d)
writel_relaxed(d->hwirq, reg_base + INTCL_CACR);
}
+static int csky_mpintc_set_type(struct irq_data *d, unsigned int type)
+{
+ switch (type & IRQ_TYPE_SENSE_MASK) {
+ case IRQ_TYPE_LEVEL_HIGH:
+ __trigger[d->hwirq] = 0;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ __trigger[d->hwirq] = 1;
+ break;
+ case IRQ_TYPE_EDGE_RISING:
+ __trigger[d->hwirq] = 2;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ __trigger[d->hwirq] = 3;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
#ifdef CONFIG_SMP
static int csky_irq_set_affinity(struct irq_data *d,
const struct cpumask *mask_val,
@@ -101,6 +175,7 @@ static struct irq_chip csky_irq_chip = {
.irq_eoi = csky_mpintc_eoi,
.irq_enable = csky_mpintc_enable,
.irq_disable = csky_mpintc_disable,
+ .irq_set_type = csky_mpintc_set_type,
#ifdef CONFIG_SMP
.irq_set_affinity = csky_irq_set_affinity,
#endif
@@ -121,9 +196,29 @@ static int csky_irqdomain_map(struct irq_domain *d, unsigned int irq,
return 0;
}
+static int csky_irq_domain_xlate_cells(struct irq_domain *d,
+ struct device_node *ctrlr, const u32 *intspec,
+ unsigned int intsize, unsigned long *out_hwirq,
+ unsigned int *out_type)
+{
+ if (WARN_ON(intsize < 1))
+ return -EINVAL;
+
+ *out_hwirq = intspec[0];
+ if (intsize > 1)
+ *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
+ else
+ *out_type = IRQ_TYPE_NONE;
+
+ if (intsize > 2)
+ __priority[*out_hwirq] = intspec[2];
+
+ return 0;
+}
+
static const struct irq_domain_ops csky_irqdomain_ops = {
.map = csky_irqdomain_map,
- .xlate = irq_domain_xlate_onecell,
+ .xlate = csky_irq_domain_xlate_cells,
};
#ifdef CONFIG_SMP
@@ -157,6 +252,14 @@ csky_mpintc_init(struct device_node *node, struct device_node *parent)
if (ret < 0)
nr_irq = INTC_IRQS;
+ __priority = kcalloc(nr_irq, sizeof(unsigned long), GFP_KERNEL);
+ if (__priority == NULL)
+ return -ENXIO;
+
+ __trigger = kcalloc(nr_irq, sizeof(unsigned long), GFP_KERNEL);
+ if (__trigger == NULL)
+ return -ENXIO;
+
if (INTCG_base == NULL) {
INTCG_base = ioremap(mfcr("cr<31, 14>"),
INTCL_SIZE*nr_cpu_ids + INTCG_SIZE);
--
2.7.4
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