diff options
Diffstat (limited to 'drivers/irqchip/irq-tango.c')
| -rw-r--r-- | drivers/irqchip/irq-tango.c | 227 |
1 files changed, 0 insertions, 227 deletions
diff --git a/drivers/irqchip/irq-tango.c b/drivers/irqchip/irq-tango.c deleted file mode 100644 index 34290f09b853..000000000000 --- a/drivers/irqchip/irq-tango.c +++ /dev/null @@ -1,227 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Copyright (C) 2014 Mans Rullgard <mans@mansr.com> - */ - -#include <linux/init.h> -#include <linux/irq.h> -#include <linux/irqchip.h> -#include <linux/irqchip/chained_irq.h> -#include <linux/ioport.h> -#include <linux/io.h> -#include <linux/of_address.h> -#include <linux/of_irq.h> -#include <linux/slab.h> - -#define IRQ0_CTL_BASE 0x0000 -#define IRQ1_CTL_BASE 0x0100 -#define EDGE_CTL_BASE 0x0200 -#define IRQ2_CTL_BASE 0x0300 - -#define IRQ_CTL_HI 0x18 -#define EDGE_CTL_HI 0x20 - -#define IRQ_STATUS 0x00 -#define IRQ_RAWSTAT 0x04 -#define IRQ_EN_SET 0x08 -#define IRQ_EN_CLR 0x0c -#define IRQ_SOFT_SET 0x10 -#define IRQ_SOFT_CLR 0x14 - -#define EDGE_STATUS 0x00 -#define EDGE_RAWSTAT 0x04 -#define EDGE_CFG_RISE 0x08 -#define EDGE_CFG_FALL 0x0c -#define EDGE_CFG_RISE_SET 0x10 -#define EDGE_CFG_RISE_CLR 0x14 -#define EDGE_CFG_FALL_SET 0x18 -#define EDGE_CFG_FALL_CLR 0x1c - -struct tangox_irq_chip { - void __iomem *base; - unsigned long ctl; -}; - -static inline u32 intc_readl(struct tangox_irq_chip *chip, int reg) -{ - return readl_relaxed(chip->base + reg); -} - -static inline void intc_writel(struct tangox_irq_chip *chip, int reg, u32 val) -{ - writel_relaxed(val, chip->base + reg); -} - -static void tangox_dispatch_irqs(struct irq_domain *dom, unsigned int status, - int base) -{ - unsigned int hwirq; - unsigned int virq; - - while (status) { - hwirq = __ffs(status); - virq = irq_find_mapping(dom, base + hwirq); - if (virq) - generic_handle_irq(virq); - status &= ~BIT(hwirq); - } -} - -static void tangox_irq_handler(struct irq_desc *desc) -{ - struct irq_domain *dom = irq_desc_get_handler_data(desc); - struct irq_chip *host_chip = irq_desc_get_chip(desc); - struct tangox_irq_chip *chip = dom->host_data; - unsigned int status_lo, status_hi; - - chained_irq_enter(host_chip, desc); - - status_lo = intc_readl(chip, chip->ctl + IRQ_STATUS); - status_hi = intc_readl(chip, chip->ctl + IRQ_CTL_HI + IRQ_STATUS); - - tangox_dispatch_irqs(dom, status_lo, 0); - tangox_dispatch_irqs(dom, status_hi, 32); - - chained_irq_exit(host_chip, desc); -} - -static int tangox_irq_set_type(struct irq_data *d, unsigned int flow_type) -{ - struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); - struct tangox_irq_chip *chip = gc->domain->host_data; - struct irq_chip_regs *regs = &gc->chip_types[0].regs; - - switch (flow_type & IRQ_TYPE_SENSE_MASK) { - case IRQ_TYPE_EDGE_RISING: - intc_writel(chip, regs->type + EDGE_CFG_RISE_SET, d->mask); - intc_writel(chip, regs->type + EDGE_CFG_FALL_CLR, d->mask); - break; - - case IRQ_TYPE_EDGE_FALLING: - intc_writel(chip, regs->type + EDGE_CFG_RISE_CLR, d->mask); - intc_writel(chip, regs->type + EDGE_CFG_FALL_SET, d->mask); - break; - - case IRQ_TYPE_LEVEL_HIGH: - intc_writel(chip, regs->type + EDGE_CFG_RISE_CLR, d->mask); - intc_writel(chip, regs->type + EDGE_CFG_FALL_CLR, d->mask); - break; - - case IRQ_TYPE_LEVEL_LOW: - intc_writel(chip, regs->type + EDGE_CFG_RISE_SET, d->mask); - intc_writel(chip, regs->type + EDGE_CFG_FALL_SET, d->mask); - break; - - default: - pr_err("Invalid trigger mode %x for IRQ %d\n", - flow_type, d->irq); - return -EINVAL; - } - - return irq_setup_alt_chip(d, flow_type); -} - -static void __init tangox_irq_init_chip(struct irq_chip_generic *gc, - unsigned long ctl_offs, - unsigned long edge_offs) -{ - struct tangox_irq_chip *chip = gc->domain->host_data; - struct irq_chip_type *ct = gc->chip_types; - unsigned long ctl_base = chip->ctl + ctl_offs; - unsigned long edge_base = EDGE_CTL_BASE + edge_offs; - int i; - - gc->reg_base = chip->base; - gc->unused = 0; - - for (i = 0; i < 2; i++) { - ct[i].chip.irq_ack = irq_gc_ack_set_bit; - ct[i].chip.irq_mask = irq_gc_mask_disable_reg; - ct[i].chip.irq_mask_ack = irq_gc_mask_disable_and_ack_set; - ct[i].chip.irq_unmask = irq_gc_unmask_enable_reg; - ct[i].chip.irq_set_type = tangox_irq_set_type; - ct[i].chip.name = gc->domain->name; - - ct[i].regs.enable = ctl_base + IRQ_EN_SET; - ct[i].regs.disable = ctl_base + IRQ_EN_CLR; - ct[i].regs.ack = edge_base + EDGE_RAWSTAT; - ct[i].regs.type = edge_base; - } - - ct[0].type = IRQ_TYPE_LEVEL_MASK; - ct[0].handler = handle_level_irq; - - ct[1].type = IRQ_TYPE_EDGE_BOTH; - ct[1].handler = handle_edge_irq; - - intc_writel(chip, ct->regs.disable, 0xffffffff); - intc_writel(chip, ct->regs.ack, 0xffffffff); -} - -static void __init tangox_irq_domain_init(struct irq_domain *dom) -{ - struct irq_chip_generic *gc; - int i; - - for (i = 0; i < 2; i++) { - gc = irq_get_domain_generic_chip(dom, i * 32); - tangox_irq_init_chip(gc, i * IRQ_CTL_HI, i * EDGE_CTL_HI); - } -} - -static int __init tangox_irq_init(void __iomem *base, struct resource *baseres, - struct device_node *node) -{ - struct tangox_irq_chip *chip; - struct irq_domain *dom; - struct resource res; - int irq; - int err; - - irq = irq_of_parse_and_map(node, 0); - if (!irq) - panic("%pOFn: failed to get IRQ", node); - - err = of_address_to_resource(node, 0, &res); - if (err) - panic("%pOFn: failed to get address", node); - - chip = kzalloc(sizeof(*chip), GFP_KERNEL); - chip->ctl = res.start - baseres->start; - chip->base = base; - - dom = irq_domain_add_linear(node, 64, &irq_generic_chip_ops, chip); - if (!dom) - panic("%pOFn: failed to create irqdomain", node); - - err = irq_alloc_domain_generic_chips(dom, 32, 2, node->name, - handle_level_irq, 0, 0, 0); - if (err) - panic("%pOFn: failed to allocate irqchip", node); - - tangox_irq_domain_init(dom); - - irq_set_chained_handler_and_data(irq, tangox_irq_handler, dom); - - return 0; -} - -static int __init tangox_of_irq_init(struct device_node *node, - struct device_node *parent) -{ - struct device_node *c; - struct resource res; - void __iomem *base; - - base = of_iomap(node, 0); - if (!base) - panic("%pOFn: of_iomap failed", node); - - of_address_to_resource(node, 0, &res); - - for_each_child_of_node(node, c) - tangox_irq_init(base, &res, c); - - return 0; -} -IRQCHIP_DECLARE(tangox_intc, "sigma,smp8642-intc", tangox_of_irq_init); |