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irqchip/sun4i: Add a struct to hold global variables 

In order to support different chips, IC specific data should be hold in
a struct. This patch moves irq_base and irq_domain global variables to
struct.

Signed-off-by: Mesih Kilinc <mesihkilinc@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Mesih Kilinc 2018-12-02 23:23:39 +03:00 committed by Marc Zyngier
parent a15b743908
commit 177304cf92
1 changed files with 38 additions and 26 deletions
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64
drivers/irqchip/irq-sun4i.c
View File

@ -31,8 +31,12 @@
#define SUN4I_IRQ_ENABLE_REG(x) (0x40 + 0x4 * x)
#define SUN4I_IRQ_MASK_REG(x) (0x50 + 0x4 * x)
static void __iomem *sun4i_irq_base;
static struct irq_domain *sun4i_irq_domain;
struct sun4i_irq_chip_data {
void __iomem *irq_base;
struct irq_domain *irq_domain;
};
static struct sun4i_irq_chip_data *irq_ic_data;
static void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs);
@ -43,7 +47,7 @@ static void sun4i_irq_ack(struct irq_data *irqd)
if (irq != 0)
return; /* Only IRQ 0 / the ENMI needs to be acked */
writel(BIT(0), sun4i_irq_base + SUN4I_IRQ_PENDING_REG(0));
writel(BIT(0), irq_ic_data->irq_base + SUN4I_IRQ_PENDING_REG(0));
}
static void sun4i_irq_mask(struct irq_data *irqd)
@ -53,9 +57,9 @@ static void sun4i_irq_mask(struct irq_data *irqd)
int reg = irq / 32;
u32 val;
val = readl(sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg));
val = readl(irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(reg));
writel(val & ~(1 << irq_off),
sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg));
irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(reg));
}
static void sun4i_irq_unmask(struct irq_data *irqd)
@ -65,9 +69,9 @@ static void sun4i_irq_unmask(struct irq_data *irqd)
int reg = irq / 32;
u32 val;
val = readl(sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg));
val = readl(irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(reg));
writel(val | (1 << irq_off),
sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(reg));
irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(reg));
}
static struct irq_chip sun4i_irq_chip = {
@ -95,35 +99,41 @@ static const struct irq_domain_ops sun4i_irq_ops = {
static int __init sun4i_of_init(struct device_node *node,
struct device_node *parent)
{
sun4i_irq_base = of_iomap(node, 0);
if (!sun4i_irq_base)
irq_ic_data = kzalloc(sizeof(struct sun4i_irq_chip_data), GFP_KERNEL);
if (!irq_ic_data) {
pr_err("kzalloc failed!\n");
return -ENOMEM;
}
irq_ic_data->irq_base = of_iomap(node, 0);
if (!irq_ic_data->irq_base)
panic("%pOF: unable to map IC registers\n",
node);
/* Disable all interrupts */
writel(0, sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(0));
writel(0, sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(1));
writel(0, sun4i_irq_base + SUN4I_IRQ_ENABLE_REG(2));
writel(0, irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(0));
writel(0, irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(1));
writel(0, irq_ic_data->irq_base + SUN4I_IRQ_ENABLE_REG(2));
/* Unmask all the interrupts, ENABLE_REG(x) is used for masking */
writel(0, sun4i_irq_base + SUN4I_IRQ_MASK_REG(0));
writel(0, sun4i_irq_base + SUN4I_IRQ_MASK_REG(1));
writel(0, sun4i_irq_base + SUN4I_IRQ_MASK_REG(2));
writel(0, irq_ic_data->irq_base + SUN4I_IRQ_MASK_REG(0));
writel(0, irq_ic_data->irq_base + SUN4I_IRQ_MASK_REG(1));
writel(0, irq_ic_data->irq_base + SUN4I_IRQ_MASK_REG(2));
/* Clear all the pending interrupts */
writel(0xffffffff, sun4i_irq_base + SUN4I_IRQ_PENDING_REG(0));
writel(0xffffffff, sun4i_irq_base + SUN4I_IRQ_PENDING_REG(1));
writel(0xffffffff, sun4i_irq_base + SUN4I_IRQ_PENDING_REG(2));
writel(0xffffffff, irq_ic_data->irq_base + SUN4I_IRQ_PENDING_REG(0));
writel(0xffffffff, irq_ic_data->irq_base + SUN4I_IRQ_PENDING_REG(1));
writel(0xffffffff, irq_ic_data->irq_base + SUN4I_IRQ_PENDING_REG(2));
/* Enable protection mode */
writel(0x01, sun4i_irq_base + SUN4I_IRQ_PROTECTION_REG);
writel(0x01, irq_ic_data->irq_base + SUN4I_IRQ_PROTECTION_REG);
/* Configure the external interrupt source type */
writel(0x00, sun4i_irq_base + SUN4I_IRQ_NMI_CTRL_REG);
writel(0x00, irq_ic_data->irq_base + SUN4I_IRQ_NMI_CTRL_REG);
sun4i_irq_domain = irq_domain_add_linear(node, 3 * 32,
irq_ic_data->irq_domain = irq_domain_add_linear(node, 3 * 32,
&sun4i_irq_ops, NULL);
if (!sun4i_irq_domain)
if (!irq_ic_data->irq_domain)
panic("%pOF: unable to create IRQ domain\n", node);
set_handle_irq(sun4i_handle_irq);
@ -146,13 +156,15 @@ static void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs)
* the extra check in the common case of 1 hapening after having
* read the vector-reg once.
*/
hwirq = readl(sun4i_irq_base + SUN4I_IRQ_VECTOR_REG) >> 2;
hwirq = readl(irq_ic_data->irq_base + SUN4I_IRQ_VECTOR_REG) >> 2;
if (hwirq == 0 &&
!(readl(sun4i_irq_base + SUN4I_IRQ_PENDING_REG(0)) & BIT(0)))
!(readl(irq_ic_data->irq_base + SUN4I_IRQ_PENDING_REG(0)) &
BIT(0)))
return;
do {
handle_domain_irq(sun4i_irq_domain, hwirq, regs);
hwirq = readl(sun4i_irq_base + SUN4I_IRQ_VECTOR_REG) >> 2;
handle_domain_irq(irq_ic_data->irq_domain, hwirq, regs);
hwirq = readl(irq_ic_data->irq_base +
SUN4I_IRQ_VECTOR_REG) >> 2;
} while (hwirq != 0);
}