diff options
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-sifive-plic.c | 80 |
1 files changed, 75 insertions, 5 deletions
diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c index bb87e4c3b88e..b3a36dca7f1b 100644 --- a/drivers/irqchip/irq-sifive-plic.c +++ b/drivers/irqchip/irq-sifive-plic.c @@ -60,10 +60,13 @@ #define PLIC_DISABLE_THRESHOLD 0x7 #define PLIC_ENABLE_THRESHOLD 0 +#define PLIC_QUIRK_EDGE_INTERRUPT 0 + struct plic_priv { struct cpumask lmask; struct irq_domain *irqdomain; void __iomem *regs; + unsigned long plic_quirks; }; struct plic_handler { @@ -81,6 +84,8 @@ static int plic_parent_irq __ro_after_init; static bool plic_cpuhp_setup_done __ro_after_init; static DEFINE_PER_CPU(struct plic_handler, plic_handlers); +static int plic_irq_set_type(struct irq_data *d, unsigned int type); + static void __plic_toggle(void __iomem *enable_base, int hwirq, int enable) { u32 __iomem *reg = enable_base + (hwirq / 32) * sizeof(u32); @@ -176,6 +181,17 @@ static void plic_irq_eoi(struct irq_data *d) } } +static struct irq_chip plic_edge_chip = { + .name = "SiFive PLIC", + .irq_ack = plic_irq_eoi, + .irq_mask = plic_irq_mask, + .irq_unmask = plic_irq_unmask, +#ifdef CONFIG_SMP + .irq_set_affinity = plic_set_affinity, +#endif + .irq_set_type = plic_irq_set_type, +}; + static struct irq_chip plic_chip = { .name = "SiFive PLIC", .irq_mask = plic_irq_mask, @@ -184,8 +200,32 @@ static struct irq_chip plic_chip = { #ifdef CONFIG_SMP .irq_set_affinity = plic_set_affinity, #endif + .irq_set_type = plic_irq_set_type, }; +static int plic_irq_set_type(struct irq_data *d, unsigned int type) +{ + struct plic_priv *priv = irq_data_get_irq_chip_data(d); + + if (!test_bit(PLIC_QUIRK_EDGE_INTERRUPT, &priv->plic_quirks)) + return IRQ_SET_MASK_OK_NOCOPY; + + switch (type) { + case IRQ_TYPE_EDGE_RISING: + irq_set_chip_handler_name_locked(d, &plic_edge_chip, + handle_edge_irq, NULL); + break; + case IRQ_TYPE_LEVEL_HIGH: + irq_set_chip_handler_name_locked(d, &plic_chip, + handle_fasteoi_irq, NULL); + break; + default: + return -EINVAL; + } + + return IRQ_SET_MASK_OK; +} + static int plic_irqdomain_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hwirq) { @@ -198,6 +238,19 @@ static int plic_irqdomain_map(struct irq_domain *d, unsigned int irq, return 0; } +static int plic_irq_domain_translate(struct irq_domain *d, + struct irq_fwspec *fwspec, + unsigned long *hwirq, + unsigned int *type) +{ + struct plic_priv *priv = d->host_data; + + if (test_bit(PLIC_QUIRK_EDGE_INTERRUPT, &priv->plic_quirks)) + return irq_domain_translate_twocell(d, fwspec, hwirq, type); + + return irq_domain_translate_onecell(d, fwspec, hwirq, type); +} + static int plic_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, unsigned int nr_irqs, void *arg) { @@ -206,7 +259,7 @@ static int plic_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, unsigned int type; struct irq_fwspec *fwspec = arg; - ret = irq_domain_translate_onecell(domain, fwspec, &hwirq, &type); + ret = plic_irq_domain_translate(domain, fwspec, &hwirq, &type); if (ret) return ret; @@ -220,7 +273,7 @@ static int plic_irq_domain_alloc(struct irq_domain *domain, unsigned int virq, } static const struct irq_domain_ops plic_irqdomain_ops = { - .translate = irq_domain_translate_onecell, + .translate = plic_irq_domain_translate, .alloc = plic_irq_domain_alloc, .free = irq_domain_free_irqs_top, }; @@ -281,8 +334,9 @@ static int plic_starting_cpu(unsigned int cpu) return 0; } -static int __init plic_init(struct device_node *node, - struct device_node *parent) +static int __init __plic_init(struct device_node *node, + struct device_node *parent, + unsigned long plic_quirks) { int error = 0, nr_contexts, nr_handlers = 0, i; u32 nr_irqs; @@ -293,6 +347,8 @@ static int __init plic_init(struct device_node *node, if (!priv) return -ENOMEM; + priv->plic_quirks = plic_quirks; + priv->regs = of_iomap(node, 0); if (WARN_ON(!priv->regs)) { error = -EIO; @@ -410,6 +466,20 @@ out_free_priv: return error; } +static int __init plic_init(struct device_node *node, + struct device_node *parent) +{ + return __plic_init(node, parent, 0); +} + IRQCHIP_DECLARE(sifive_plic, "sifive,plic-1.0.0", plic_init); IRQCHIP_DECLARE(riscv_plic0, "riscv,plic0", plic_init); /* for legacy systems */ -IRQCHIP_DECLARE(thead_c900_plic, "thead,c900-plic", plic_init); /* for firmware driver */ + +static int __init plic_edge_init(struct device_node *node, + struct device_node *parent) +{ + return __plic_init(node, parent, BIT(PLIC_QUIRK_EDGE_INTERRUPT)); +} + +IRQCHIP_DECLARE(andestech_nceplic100, "andestech,nceplic100", plic_edge_init); +IRQCHIP_DECLARE(thead_c900_plic, "thead,c900-plic", plic_edge_init); |