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path: root/drivers/irqchip/irq-imx-irqsteer.c
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Diffstat (limited to 'drivers/irqchip/irq-imx-irqsteer.c')
-rw-r--r--drivers/irqchip/irq-imx-irqsteer.c115
1 files changed, 83 insertions, 32 deletions
diff --git a/drivers/irqchip/irq-imx-irqsteer.c b/drivers/irqchip/irq-imx-irqsteer.c
index 5b3f1d735685..d1098f4da6a4 100644
--- a/drivers/irqchip/irq-imx-irqsteer.c
+++ b/drivers/irqchip/irq-imx-irqsteer.c
@@ -10,10 +10,11 @@
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
+#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/spinlock.h>
-#define CTRL_STRIDE_OFF(_t, _r) (_t * 8 * _r)
+#define CTRL_STRIDE_OFF(_t, _r) (_t * 4 * _r)
#define CHANCTRL 0x0
#define CHANMASK(n, t) (CTRL_STRIDE_OFF(t, 0) + 0x4 * (n) + 0x4)
#define CHANSET(n, t) (CTRL_STRIDE_OFF(t, 1) + 0x4 * (n) + 0x4)
@@ -21,12 +22,15 @@
#define CHAN_MINTDIS(t) (CTRL_STRIDE_OFF(t, 3) + 0x4)
#define CHAN_MASTRSTAT(t) (CTRL_STRIDE_OFF(t, 3) + 0x8)
+#define CHAN_MAX_OUTPUT_INT 0x8
+
struct irqsteer_data {
void __iomem *regs;
struct clk *ipg_clk;
- int irq;
+ int irq[CHAN_MAX_OUTPUT_INT];
+ int irq_count;
raw_spinlock_t lock;
- int irq_groups;
+ int reg_num;
int channel;
struct irq_domain *domain;
u32 *saved_reg;
@@ -35,7 +39,7 @@ struct irqsteer_data {
static int imx_irqsteer_get_reg_index(struct irqsteer_data *data,
unsigned long irqnum)
{
- return (data->irq_groups * 2 - irqnum / 32 - 1);
+ return (data->reg_num - irqnum / 32 - 1);
}
static void imx_irqsteer_irq_unmask(struct irq_data *d)
@@ -46,9 +50,9 @@ static void imx_irqsteer_irq_unmask(struct irq_data *d)
u32 val;
raw_spin_lock_irqsave(&data->lock, flags);
- val = readl_relaxed(data->regs + CHANMASK(idx, data->irq_groups));
+ val = readl_relaxed(data->regs + CHANMASK(idx, data->reg_num));
val |= BIT(d->hwirq % 32);
- writel_relaxed(val, data->regs + CHANMASK(idx, data->irq_groups));
+ writel_relaxed(val, data->regs + CHANMASK(idx, data->reg_num));
raw_spin_unlock_irqrestore(&data->lock, flags);
}
@@ -60,9 +64,9 @@ static void imx_irqsteer_irq_mask(struct irq_data *d)
u32 val;
raw_spin_lock_irqsave(&data->lock, flags);
- val = readl_relaxed(data->regs + CHANMASK(idx, data->irq_groups));
+ val = readl_relaxed(data->regs + CHANMASK(idx, data->reg_num));
val &= ~BIT(d->hwirq % 32);
- writel_relaxed(val, data->regs + CHANMASK(idx, data->irq_groups));
+ writel_relaxed(val, data->regs + CHANMASK(idx, data->reg_num));
raw_spin_unlock_irqrestore(&data->lock, flags);
}
@@ -87,23 +91,47 @@ static const struct irq_domain_ops imx_irqsteer_domain_ops = {
.xlate = irq_domain_xlate_onecell,
};
+static int imx_irqsteer_get_hwirq_base(struct irqsteer_data *data, u32 irq)
+{
+ int i;
+
+ for (i = 0; i < data->irq_count; i++) {
+ if (data->irq[i] == irq)
+ return i * 64;
+ }
+
+ return -EINVAL;
+}
+
static void imx_irqsteer_irq_handler(struct irq_desc *desc)
{
struct irqsteer_data *data = irq_desc_get_handler_data(desc);
- int i;
+ int hwirq;
+ int irq, i;
chained_irq_enter(irq_desc_get_chip(desc), desc);
- for (i = 0; i < data->irq_groups * 64; i += 32) {
- int idx = imx_irqsteer_get_reg_index(data, i);
+ irq = irq_desc_get_irq(desc);
+ hwirq = imx_irqsteer_get_hwirq_base(data, irq);
+ if (hwirq < 0) {
+ pr_warn("%s: unable to get hwirq base for irq %d\n",
+ __func__, irq);
+ return;
+ }
+
+ for (i = 0; i < 2; i++, hwirq += 32) {
+ int idx = imx_irqsteer_get_reg_index(data, hwirq);
unsigned long irqmap;
int pos, virq;
+ if (hwirq >= data->reg_num * 32)
+ break;
+
irqmap = readl_relaxed(data->regs +
- CHANSTATUS(idx, data->irq_groups));
+ CHANSTATUS(idx, data->reg_num));
for_each_set_bit(pos, &irqmap, 32) {
- virq = irq_find_mapping(data->domain, pos + i);
+ virq = irq_find_mapping(data->domain, pos + hwirq);
if (virq)
generic_handle_irq(virq);
}
@@ -117,7 +145,8 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct irqsteer_data *data;
struct resource *res;
- int ret;
+ u32 irqs_num;
+ int i, ret;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
@@ -130,12 +159,6 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
return PTR_ERR(data->regs);
}
- data->irq = platform_get_irq(pdev, 0);
- if (data->irq <= 0) {
- dev_err(&pdev->dev, "failed to get irq\n");
- return -ENODEV;
- }
-
data->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
if (IS_ERR(data->ipg_clk)) {
ret = PTR_ERR(data->ipg_clk);
@@ -146,12 +169,19 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
raw_spin_lock_init(&data->lock);
- of_property_read_u32(np, "fsl,irq-groups", &data->irq_groups);
+ of_property_read_u32(np, "fsl,num-irqs", &irqs_num);
of_property_read_u32(np, "fsl,channel", &data->channel);
+ /*
+ * There is one output irq for each group of 64 inputs.
+ * One register bit map can represent 32 input interrupts.
+ */
+ data->irq_count = DIV_ROUND_UP(irqs_num, 64);
+ data->reg_num = irqs_num / 32;
+
if (IS_ENABLED(CONFIG_PM_SLEEP)) {
data->saved_reg = devm_kzalloc(&pdev->dev,
- sizeof(u32) * data->irq_groups * 2,
+ sizeof(u32) * data->reg_num,
GFP_KERNEL);
if (!data->saved_reg)
return -ENOMEM;
@@ -166,27 +196,48 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
/* steer all IRQs into configured channel */
writel_relaxed(BIT(data->channel), data->regs + CHANCTRL);
- data->domain = irq_domain_add_linear(np, data->irq_groups * 64,
+ data->domain = irq_domain_add_linear(np, data->reg_num * 32,
&imx_irqsteer_domain_ops, data);
if (!data->domain) {
dev_err(&pdev->dev, "failed to create IRQ domain\n");
- clk_disable_unprepare(data->ipg_clk);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ if (!data->irq_count || data->irq_count > CHAN_MAX_OUTPUT_INT) {
+ ret = -EINVAL;
+ goto out;
}
- irq_set_chained_handler_and_data(data->irq, imx_irqsteer_irq_handler,
- data);
+ for (i = 0; i < data->irq_count; i++) {
+ data->irq[i] = irq_of_parse_and_map(np, i);
+ if (!data->irq[i]) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ irq_set_chained_handler_and_data(data->irq[i],
+ imx_irqsteer_irq_handler,
+ data);
+ }
platform_set_drvdata(pdev, data);
return 0;
+out:
+ clk_disable_unprepare(data->ipg_clk);
+ return ret;
}
static int imx_irqsteer_remove(struct platform_device *pdev)
{
struct irqsteer_data *irqsteer_data = platform_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < irqsteer_data->irq_count; i++)
+ irq_set_chained_handler_and_data(irqsteer_data->irq[i],
+ NULL, NULL);
- irq_set_chained_handler_and_data(irqsteer_data->irq, NULL, NULL);
irq_domain_remove(irqsteer_data->domain);
clk_disable_unprepare(irqsteer_data->ipg_clk);
@@ -199,9 +250,9 @@ static void imx_irqsteer_save_regs(struct irqsteer_data *data)
{
int i;
- for (i = 0; i < data->irq_groups * 2; i++)
+ for (i = 0; i < data->reg_num; i++)
data->saved_reg[i] = readl_relaxed(data->regs +
- CHANMASK(i, data->irq_groups));
+ CHANMASK(i, data->reg_num));
}
static void imx_irqsteer_restore_regs(struct irqsteer_data *data)
@@ -209,9 +260,9 @@ static void imx_irqsteer_restore_regs(struct irqsteer_data *data)
int i;
writel_relaxed(BIT(data->channel), data->regs + CHANCTRL);
- for (i = 0; i < data->irq_groups * 2; i++)
+ for (i = 0; i < data->reg_num; i++)
writel_relaxed(data->saved_reg[i],
- data->regs + CHANMASK(i, data->irq_groups));
+ data->regs + CHANMASK(i, data->reg_num));
}
static int imx_irqsteer_suspend(struct device *dev)
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-11 08:35:45 +0000