192 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#include <linux/sh_intc.h>3#include <linux/irq.h>4#include <linux/irqdomain.h>5#include <linux/list.h>6#include <linux/kernel.h>7#include <linux/types.h>8#include <linux/radix-tree.h>9#include <linux/device.h>10 11#define _INTC_MK(fn, mode, addr_e, addr_d, width, shift) \12 ((shift) | ((width) << 5) | ((fn) << 9) | ((mode) << 13) | \13 ((addr_e) << 16) | ((addr_d << 24)))14 15#define _INTC_SHIFT(h) (h & 0x1f)16#define _INTC_WIDTH(h) ((h >> 5) & 0xf)17#define _INTC_FN(h) ((h >> 9) & 0xf)18#define _INTC_MODE(h) ((h >> 13) & 0x7)19#define _INTC_ADDR_E(h) ((h >> 16) & 0xff)20#define _INTC_ADDR_D(h) ((h >> 24) & 0xff)21 22#ifdef CONFIG_SMP23#define IS_SMP(x) (x.smp)24#define INTC_REG(d, x, c) (d->reg[(x)] + ((d->smp[(x)] & 0xff) * c))25#define SMP_NR(d, x) ((d->smp[(x)] >> 8) ? (d->smp[(x)] >> 8) : 1)26#else27#define IS_SMP(x) 028#define INTC_REG(d, x, c) (d->reg[(x)])29#define SMP_NR(d, x) 130#endif31 32struct intc_handle_int {33 unsigned int irq;34 unsigned long handle;35};36 37struct intc_window {38 phys_addr_t phys;39 void __iomem *virt;40 unsigned long size;41};42 43struct intc_map_entry {44 intc_enum enum_id;45 struct intc_desc_int *desc;46};47 48struct intc_subgroup_entry {49 unsigned int pirq;50 intc_enum enum_id;51 unsigned long handle;52};53 54struct intc_desc_int {55 struct list_head list;56 struct device dev;57 struct radix_tree_root tree;58 raw_spinlock_t lock;59 unsigned int index;60 unsigned long *reg;61#ifdef CONFIG_SMP62 unsigned long *smp;63#endif64 unsigned int nr_reg;65 struct intc_handle_int *prio;66 unsigned int nr_prio;67 struct intc_handle_int *sense;68 unsigned int nr_sense;69 struct intc_window *window;70 unsigned int nr_windows;71 struct irq_domain *domain;72 struct irq_chip chip;73 bool skip_suspend;74};75 76 77enum {78 REG_FN_ERR = 0,79 REG_FN_TEST_BASE = 1,80 REG_FN_WRITE_BASE = 5,81 REG_FN_MODIFY_BASE = 982};83 84enum { MODE_ENABLE_REG = 0, /* Bit(s) set -> interrupt enabled */85 MODE_MASK_REG, /* Bit(s) set -> interrupt disabled */86 MODE_DUAL_REG, /* Two registers, set bit to enable / disable */87 MODE_PRIO_REG, /* Priority value written to enable interrupt */88 MODE_PCLR_REG, /* Above plus all bits set to disable interrupt */89};90 91static inline struct intc_desc_int *get_intc_desc(unsigned int irq)92{93 struct irq_chip *chip = irq_get_chip(irq);94 95 return container_of(chip, struct intc_desc_int, chip);96}97 98/*99 * Grumble.100 */101static inline void activate_irq(int irq)102{103 irq_modify_status(irq, IRQ_NOREQUEST, IRQ_NOPROBE);104}105 106static inline int intc_handle_int_cmp(const void *a, const void *b)107{108 const struct intc_handle_int *_a = a;109 const struct intc_handle_int *_b = b;110 111 return _a->irq - _b->irq;112}113 114/* access.c */115extern unsigned long116(*intc_reg_fns[])(unsigned long addr, unsigned long h, unsigned long data);117 118extern unsigned long119(*intc_enable_fns[])(unsigned long addr, unsigned long handle,120 unsigned long (*fn)(unsigned long,121 unsigned long, unsigned long),122 unsigned int irq);123extern unsigned long124(*intc_disable_fns[])(unsigned long addr, unsigned long handle,125 unsigned long (*fn)(unsigned long,126 unsigned long, unsigned long),127 unsigned int irq);128extern unsigned long129(*intc_enable_noprio_fns[])(unsigned long addr, unsigned long handle,130 unsigned long (*fn)(unsigned long,131 unsigned long, unsigned long),132 unsigned int irq);133 134unsigned long intc_phys_to_virt(struct intc_desc_int *d, unsigned long address);135unsigned int intc_get_reg(struct intc_desc_int *d, unsigned long address);136unsigned int intc_set_field_from_handle(unsigned int value,137 unsigned int field_value,138 unsigned int handle);139unsigned long intc_get_field_from_handle(unsigned int value,140 unsigned int handle);141 142/* balancing.c */143#ifdef CONFIG_INTC_BALANCING144void intc_balancing_enable(unsigned int irq);145void intc_balancing_disable(unsigned int irq);146void intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,147 struct intc_desc_int *d, intc_enum id);148#else149static inline void intc_balancing_enable(unsigned int irq) { }150static inline void intc_balancing_disable(unsigned int irq) { }151static inline void152intc_set_dist_handle(unsigned int irq, struct intc_desc *desc,153 struct intc_desc_int *d, intc_enum id) { }154#endif155 156/* chip.c */157extern struct irq_chip intc_irq_chip;158void _intc_enable(struct irq_data *data, unsigned long handle);159 160/* core.c */161extern struct list_head intc_list;162extern raw_spinlock_t intc_big_lock;163extern const struct bus_type intc_subsys;164 165unsigned int intc_get_dfl_prio_level(void);166unsigned int intc_get_prio_level(unsigned int irq);167void intc_set_prio_level(unsigned int irq, unsigned int level);168 169/* handle.c */170unsigned int intc_get_mask_handle(struct intc_desc *desc,171 struct intc_desc_int *d,172 intc_enum enum_id, int do_grps);173unsigned int intc_get_prio_handle(struct intc_desc *desc,174 struct intc_desc_int *d,175 intc_enum enum_id, int do_grps);176unsigned int intc_get_sense_handle(struct intc_desc *desc,177 struct intc_desc_int *d,178 intc_enum enum_id);179void intc_set_ack_handle(unsigned int irq, struct intc_desc *desc,180 struct intc_desc_int *d, intc_enum id);181unsigned long intc_get_ack_handle(unsigned int irq);182void intc_enable_disable_enum(struct intc_desc *desc, struct intc_desc_int *d,183 intc_enum enum_id, int enable);184 185/* irqdomain.c */186void intc_irq_domain_init(struct intc_desc_int *d, struct intc_hw_desc *hw);187 188/* virq.c */189void intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d);190void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d);191struct intc_map_entry *intc_irq_xlate_get(unsigned int irq);192