// SPDX-License-Identifier: GPL-2.0 /* * Renesas INTC External IRQ Pin Driver * * Copyright (C) 2013 Magnus Damm */ #include <linux/init.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/spinlock.h> #include <linux/interrupt.h> #include <linux/ioport.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/pm_runtime.h> #define INTC_IRQPIN_MAX … #define INTC_IRQPIN_REG_SENSE … #define INTC_IRQPIN_REG_PRIO … #define INTC_IRQPIN_REG_SOURCE … #define INTC_IRQPIN_REG_MASK … #define INTC_IRQPIN_REG_CLEAR … #define INTC_IRQPIN_REG_NR_MANDATORY … #define INTC_IRQPIN_REG_IRLM … #define INTC_IRQPIN_REG_NR … /* INTC external IRQ PIN hardware register access: * * SENSE is read-write 32-bit with 2-bits or 4-bits per IRQ (*) * PRIO is read-write 32-bit with 4-bits per IRQ (**) * SOURCE is read-only 32-bit or 8-bit with 1-bit per IRQ (***) * MASK is write-only 32-bit or 8-bit with 1-bit per IRQ (***) * CLEAR is write-only 32-bit or 8-bit with 1-bit per IRQ (***) * * (*) May be accessed by more than one driver instance - lock needed * (**) Read-modify-write access by one driver instance - lock needed * (***) Accessed by one driver instance only - no locking needed */ struct intc_irqpin_iomem { … }; struct intc_irqpin_irq { … }; struct intc_irqpin_priv { … }; struct intc_irqpin_config { … }; static unsigned long intc_irqpin_read32(void __iomem *iomem) { … } static unsigned long intc_irqpin_read8(void __iomem *iomem) { … } static void intc_irqpin_write32(void __iomem *iomem, unsigned long data) { … } static void intc_irqpin_write8(void __iomem *iomem, unsigned long data) { … } static inline unsigned long intc_irqpin_read(struct intc_irqpin_priv *p, int reg) { … } static inline void intc_irqpin_write(struct intc_irqpin_priv *p, int reg, unsigned long data) { … } static inline unsigned long intc_irqpin_hwirq_mask(struct intc_irqpin_priv *p, int reg, int hw_irq) { … } static inline void intc_irqpin_irq_write_hwirq(struct intc_irqpin_priv *p, int reg, int hw_irq) { … } static DEFINE_RAW_SPINLOCK(intc_irqpin_lock); /* only used by slow path */ static void intc_irqpin_read_modify_write(struct intc_irqpin_priv *p, int reg, int shift, int width, int value) { … } static void intc_irqpin_mask_unmask_prio(struct intc_irqpin_priv *p, int irq, int do_mask) { … } static int intc_irqpin_set_sense(struct intc_irqpin_priv *p, int irq, int value) { … } static void intc_irqpin_dbg(struct intc_irqpin_irq *i, char *str) { … } static void intc_irqpin_irq_enable(struct irq_data *d) { … } static void intc_irqpin_irq_disable(struct irq_data *d) { … } static void intc_irqpin_shared_irq_enable(struct irq_data *d) { … } static void intc_irqpin_shared_irq_disable(struct irq_data *d) { … } static void intc_irqpin_irq_enable_force(struct irq_data *d) { … } static void intc_irqpin_irq_disable_force(struct irq_data *d) { … } #define INTC_IRQ_SENSE_VALID … #define INTC_IRQ_SENSE(x) … static unsigned char intc_irqpin_sense[IRQ_TYPE_SENSE_MASK + 1] = …; static int intc_irqpin_irq_set_type(struct irq_data *d, unsigned int type) { … } static int intc_irqpin_irq_set_wake(struct irq_data *d, unsigned int on) { … } static irqreturn_t intc_irqpin_irq_handler(int irq, void *dev_id) { … } static irqreturn_t intc_irqpin_shared_irq_handler(int irq, void *dev_id) { … } /* * This lock class tells lockdep that INTC External IRQ Pin irqs are in a * different category than their parents, so it won't report false recursion. */ static struct lock_class_key intc_irqpin_irq_lock_class; /* And this is for the request mutex */ static struct lock_class_key intc_irqpin_irq_request_class; static int intc_irqpin_irq_domain_map(struct irq_domain *h, unsigned int virq, irq_hw_number_t hw) { … } static const struct irq_domain_ops intc_irqpin_irq_domain_ops = …; static const struct intc_irqpin_config intc_irqpin_irlm_r8a777x = …; static const struct intc_irqpin_config intc_irqpin_rmobile = …; static const struct of_device_id intc_irqpin_dt_ids[] = …; MODULE_DEVICE_TABLE(of, intc_irqpin_dt_ids); static int intc_irqpin_probe(struct platform_device *pdev) { … } static void intc_irqpin_remove(struct platform_device *pdev) { … } static int __maybe_unused intc_irqpin_suspend(struct device *dev) { … } static SIMPLE_DEV_PM_OPS(intc_irqpin_pm_ops, intc_irqpin_suspend, NULL); static struct platform_driver intc_irqpin_device_driver = …; static int __init intc_irqpin_init(void) { … } postcore_initcall(intc_irqpin_init); static void __exit intc_irqpin_exit(void) { … } module_exit(intc_irqpin_exit); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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