include/linux/of_irq.h

   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
  12 typedef 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)
  21 extern unsigned int of_irq_workarounds;
  22 extern struct device_node *of_irq_dflt_pic;
  23 int of_irq_parse_oldworld(const 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)
  28 static inline int of_irq_parse_oldworld(const 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
  35 extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq);
  36 extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
  37 extern int of_irq_to_resource(struct device_node *dev, int index,
  38                               struct resource *r);
  39
  40 #ifdef CONFIG_OF_IRQ
  41 extern void of_irq_init(const struct of_device_id *matches);
  42 extern int of_irq_parse_one(struct device_node *device, int index,
  43                           struct of_phandle_args *out_irq);
  44 extern int of_irq_count(struct device_node *dev);
  45 extern int of_irq_get(struct device_node *dev, int index);
  46 extern int of_irq_get_byname(struct device_node *dev, const char *name);
  47 extern int of_irq_to_resource_table(struct device_node *dev,
  48                 struct resource *res, int nr_irqs);
  49 extern struct device_node *of_irq_find_parent(struct device_node *child);
  50 extern struct irq_domain *of_msi_get_domain(struct device *dev,
  51                                             const struct device_node *np,
  52                                             enum irq_domain_bus_token token);
  53 extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
  54                                                         u32 id,
  55                                                         u32 bus_token);
  56 extern void of_msi_configure(struct device *dev, const struct device_node *np);
  57 u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
  58 #else
  59 static inline void of_irq_init(const struct of_device_id *matches)
  60 {
  61 }
  62 static inline int of_irq_parse_one(struct device_node *device, int index,
  63                                    struct of_phandle_args *out_irq)
  64 {
  65         return -EINVAL;
  66 }
  67 static inline int of_irq_count(struct device_node *dev)
  68 {
  69         return 0;
  70 }
  71 static inline int of_irq_get(struct device_node *dev, int index)
  72 {
  73         return 0;
  74 }
  75 static inline int of_irq_get_byname(struct device_node *dev, const char *name)
  76 {
  77         return 0;
  78 }
  79 static inline int of_irq_to_resource_table(struct device_node *dev,
  80                                            struct resource *res, int nr_irqs)
  81 {
  82         return 0;
  83 }
  84 static inline void *of_irq_find_parent(struct device_node *child)
  85 {
  86         return NULL;
  87 }
  88
  89 static inline struct irq_domain *of_msi_get_domain(struct device *dev,
  90                                                    struct device_node *np,
  91                                                    enum irq_domain_bus_token token)
  92 {
  93         return NULL;
  94 }
  95 static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
  96                                                 u32 id, u32 bus_token)
  97 {
  98         return NULL;
  99 }
 100 static inline void of_msi_configure(struct device *dev, struct device_node *np)
 101 {
 102 }
 103 static inline u32 of_msi_map_id(struct device *dev,
 104                                  struct device_node *msi_np, u32 id_in)
 105 {
 106         return id_in;
 107 }
 108 #endif
 109
 110 #if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
 111 /*
 112  * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
 113  * implements it differently.  However, the prototype is the same for all,
 114  * so declare it here regardless of the CONFIG_OF_IRQ setting.
 115  */
 116 extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
 117
 118 #else /* !CONFIG_OF && !CONFIG_SPARC */
 119 static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
 120                                                 int index)
 121 {
 122         return 0;
 123 }
 124 #endif /* !CONFIG_OF */
 125
 126 #endif /* __OF_IRQ_H */