diff options
Diffstat (limited to 'drivers/irqchip/irq-armada-370-xp.c')
| -rw-r--r-- | drivers/irqchip/irq-armada-370-xp.c | 75 |
1 files changed, 69 insertions, 6 deletions
diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c index 9e630f29ac6b..a3fd2b37ddb6 100644 --- a/drivers/irqchip/irq-armada-370-xp.c +++ b/drivers/irqchip/irq-armada-370-xp.c @@ -26,6 +26,7 @@ #include <linux/of_pci.h> #include <linux/irqdomain.h> #include <linux/slab.h> +#include <linux/syscore_ops.h> #include <linux/msi.h> #include <asm/mach/arch.h> #include <asm/exception.h> @@ -43,6 +44,7 @@ #define ARMADA_370_XP_INT_CLEAR_ENABLE_OFFS (0x34) #define ARMADA_370_XP_INT_SOURCE_CTL(irq) (0x100 + irq*4) #define ARMADA_370_XP_INT_SOURCE_CPU_MASK 0xF +#define ARMADA_370_XP_INT_IRQ_FIQ_MASK(cpuid) ((BIT(0) | BIT(8)) << cpuid) #define ARMADA_370_XP_CPU_INTACK_OFFS (0x44) #define ARMADA_375_PPI_CAUSE (0x10) @@ -66,6 +68,7 @@ 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; #ifdef CONFIG_PCI_MSI static struct irq_domain *armada_370_xp_msi_domain; static DECLARE_BITMAP(msi_used, PCI_MSI_DOORBELL_NR); @@ -406,19 +409,29 @@ static void armada_370_xp_mpic_handle_cascade_irq(unsigned int irq, struct irq_desc *desc) { struct irq_chip *chip = irq_get_chip(irq); - unsigned long irqmap, irqn; + unsigned long irqmap, irqn, irqsrc, cpuid; unsigned int cascade_irq; chained_irq_enter(chip, desc); irqmap = readl_relaxed(per_cpu_int_base + ARMADA_375_PPI_CAUSE); - - if (irqmap & BIT(0)) { - armada_370_xp_handle_msi_irq(NULL, true); - irqmap &= ~BIT(0); - } + cpuid = cpu_logical_map(smp_processor_id()); for_each_set_bit(irqn, &irqmap, BITS_PER_LONG) { + irqsrc = readl_relaxed(main_int_base + + ARMADA_370_XP_INT_SOURCE_CTL(irqn)); + + /* Check if the interrupt is not masked on current CPU. + * Test IRQ (0-1) and FIQ (8-9) mask bits. + */ + if (!(irqsrc & ARMADA_370_XP_INT_IRQ_FIQ_MASK(cpuid))) + continue; + + if (irqn == 1) { + armada_370_xp_handle_msi_irq(NULL, true); + continue; + } + cascade_irq = irq_find_mapping(armada_370_xp_mpic_domain, irqn); generic_handle_irq(cascade_irq); } @@ -474,6 +487,54 @@ armada_370_xp_handle_irq(struct pt_regs *regs) } while (1); } +static int armada_370_xp_mpic_suspend(void) +{ + doorbell_mask_reg = readl(per_cpu_int_base + + ARMADA_370_XP_IN_DRBEL_MSK_OFFS); + return 0; +} + +static void armada_370_xp_mpic_resume(void) +{ + int nirqs; + irq_hw_number_t irq; + + /* Re-enable interrupts */ + nirqs = (readl(main_int_base + ARMADA_370_XP_INT_CONTROL) >> 2) & 0x3ff; + for (irq = 0; irq < nirqs; irq++) { + struct irq_data *data; + int virq; + + virq = irq_linear_revmap(armada_370_xp_mpic_domain, irq); + if (virq == 0) + continue; + + if (irq != ARMADA_370_XP_TIMER0_PER_CPU_IRQ) + writel(irq, per_cpu_int_base + + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); + else + writel(irq, main_int_base + + ARMADA_370_XP_INT_SET_ENABLE_OFFS); + + data = irq_get_irq_data(virq); + if (!irqd_irq_disabled(data)) + armada_370_xp_irq_unmask(data); + } + + /* Reconfigure doorbells for IPIs and MSIs */ + writel(doorbell_mask_reg, + per_cpu_int_base + ARMADA_370_XP_IN_DRBEL_MSK_OFFS); + if (doorbell_mask_reg & IPI_DOORBELL_MASK) + writel(0, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); + if (doorbell_mask_reg & PCI_MSI_DOORBELL_MASK) + writel(1, per_cpu_int_base + ARMADA_370_XP_INT_CLEAR_MASK_OFFS); +} + +struct syscore_ops armada_370_xp_mpic_syscore_ops = { + .suspend = armada_370_xp_mpic_suspend, + .resume = armada_370_xp_mpic_resume, +}; + static int __init armada_370_xp_mpic_of_init(struct device_node *node, struct device_node *parent) { @@ -530,6 +591,8 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node, armada_370_xp_mpic_handle_cascade_irq); } + register_syscore_ops(&armada_370_xp_mpic_syscore_ops); + return 0; } |