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