LXR linux/include/linux/of

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __OF_IRQ_H
   3#define __OF_IRQ_H
   4
   5#include <linux/types.h>
   6#include <linux/errno.h>
   7#include <linux/irq.h>
   8#include <linux/irqdomain.h>
   9#include <linux/ioport.h>
  10#include <linux/of.h>
  11
  12typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
  13#ifdef CONFIG_IRQCHIP_XILINX_INTC_MODULE_SUPPORT_EXPERIMENTAL
  14typedef int (*of_irq_remove_cb_t)(struct device_node *, struct device_node *);
  15#endif
  16/*
  17 * Workarounds only applied to 32bit powermac machines
  18 */
  19#define OF_IMAP_OLDWORLD_MAC    0x00000001
  20#define OF_IMAP_NO_PHANDLE      0x00000002
  21
  22#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
  23extern unsigned int of_irq_workarounds;
  24extern struct device_node *of_irq_dflt_pic;
  25extern int of_irq_parse_oldworld(struct device_node *device, int index,
  26                               struct of_phandle_args *out_irq);
  27#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  28#define of_irq_workarounds (0)
  29#define of_irq_dflt_pic (NULL)
  30static inline int of_irq_parse_oldworld(struct device_node *device, int index,
  31                                      struct of_phandle_args *out_irq)
  32{
  33        return -EINVAL;
  34}
  35#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
  36
  37extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq);
  38extern int of_irq_parse_one(struct device_node *device, int index,
  39                          struct of_phandle_args *out_irq);
  40extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
  41extern int of_irq_to_resource(struct device_node *dev, int index,
  42                              struct resource *r);
  43
  44extern void of_irq_init(const struct of_device_id *matches);
  45
  46#ifdef CONFIG_OF_IRQ
  47extern int of_irq_count(struct device_node *dev);
  48extern int of_irq_get(struct device_node *dev, int index);
  49extern int of_irq_get_byname(struct device_node *dev, const char *name);
  50extern int of_irq_to_resource_table(struct device_node *dev,
  51                struct resource *res, int nr_irqs);
  52extern struct device_node *of_irq_find_parent(struct device_node *child);
  53extern struct irq_domain *of_msi_get_domain(struct device *dev,
  54                                            struct device_node *np,
  55                                            enum irq_domain_bus_token token);
  56extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
  57                                                        u32 id,
  58                                                        u32 bus_token);
  59extern void of_msi_configure(struct device *dev, struct device_node *np);
  60u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
  61#else
  62static inline int of_irq_count(struct device_node *dev)
  63{
  64        return 0;
  65}
  66static inline int of_irq_get(struct device_node *dev, int index)
  67{
  68        return 0;
  69}
  70static inline int of_irq_get_byname(struct device_node *dev, const char *name)
  71{
  72        return 0;
  73}
  74static inline int of_irq_to_resource_table(struct device_node *dev,
  75                                           struct resource *res, int nr_irqs)
  76{
  77        return 0;
  78}
  79static inline void *of_irq_find_parent(struct device_node *child)
  80{
  81        return NULL;
  82}
  83
  84static inline struct irq_domain *of_msi_get_domain(struct device *dev,
  85                                                   struct device_node *np,
  86                                                   enum irq_domain_bus_token token)
  87{
  88        return NULL;
  89}
  90static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
  91                                                u32 id, u32 bus_token)
  92{
  93        return NULL;
  94}
  95static inline void of_msi_configure(struct device *dev, struct device_node *np)
  96{
  97}
  98static inline u32 of_msi_map_id(struct device *dev,
  99                                 struct device_node *msi_np, u32 id_in)
 100{
 101        return id_in;
 102}
 103#endif
 104
 105#if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
 106/*
 107 * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
 108 * implements it differently.  However, the prototype is the same for all,
 109 * so declare it here regardless of the CONFIG_OF_IRQ setting.
 110 */
 111extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
 112
 113#else /* !CONFIG_OF && !CONFIG_SPARC */
 114static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
 115                                                int index)
 116{
 117        return 0;
 118}
 119#endif /* !CONFIG_OF */
 120
 121#endif /* __OF_IRQ_H */
 122