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
 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;
 23int 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)
 28static 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
 35extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq);
 36extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
 37extern int of_irq_to_resource(struct device_node *dev, int index,
 38			      struct resource *r);
 39
 40#ifdef CONFIG_OF_IRQ
 41extern void of_irq_init(const struct of_device_id *matches);
 42extern int of_irq_parse_one(struct device_node *device, int index,
 43			  struct of_phandle_args *out_irq);
 44extern int of_irq_count(struct device_node *dev);
 45extern int of_irq_get(struct device_node *dev, int index);
 46extern const struct cpumask *of_irq_get_affinity(struct device_node *dev,
 47						      int index);
 48extern int of_irq_get_byname(struct device_node *dev, const char *name);
 49extern int of_irq_to_resource_table(struct device_node *dev,
 50		struct resource *res, int nr_irqs);
 51extern struct device_node *of_irq_find_parent(struct device_node *child);
 52extern struct irq_domain *of_msi_get_domain(struct device *dev,
 53					    const struct device_node *np,
 54					    enum irq_domain_bus_token token);
 55extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
 56							u32 id,
 57							u32 bus_token);
 58extern void of_msi_configure(struct device *dev, const struct device_node *np);
 59extern u32 of_msi_xlate(struct device *dev, struct device_node **msi_np, u32 id_in);
 60#else
 61static inline void of_irq_init(const struct of_device_id *matches)
 62{
 63}
 64static inline int of_irq_parse_one(struct device_node *device, int index,
 65				   struct of_phandle_args *out_irq)
 66{
 67	return -EINVAL;
 68}
 69static inline int of_irq_count(struct device_node *dev)
 70{
 71	return 0;
 72}
 73static inline int of_irq_get(struct device_node *dev, int index)
 74{
 75	return 0;
 76}
 77static inline int of_irq_get_byname(struct device_node *dev, const char *name)
 78{
 79	return 0;
 80}
 81static inline const struct cpumask *of_irq_get_affinity(struct device_node *dev,
 82							int index)
 83{
 84	return NULL;
 85}
 86static inline int of_irq_to_resource_table(struct device_node *dev,
 87					   struct resource *res, int nr_irqs)
 88{
 89	return 0;
 90}
 91static inline void *of_irq_find_parent(struct device_node *child)
 92{
 93	return NULL;
 94}
 95
 96static inline struct irq_domain *of_msi_get_domain(struct device *dev,
 97						   struct device_node *np,
 98						   enum irq_domain_bus_token token)
 99{
100	return NULL;
101}
102static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
103						u32 id, u32 bus_token)
104{
105	return NULL;
106}
107static inline void of_msi_configure(struct device *dev, struct device_node *np)
108{
109}
110static inline u32 of_msi_xlate(struct device *dev, struct device_node **msi_np, u32 id_in)
111{
112	return id_in;
113}
114#endif
115
116#if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC)
117/*
118 * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
119 * implements it differently.  However, the prototype is the same for all,
120 * so declare it here regardless of the CONFIG_OF_IRQ setting.
121 */
122extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
123
124#else /* !CONFIG_OF && !CONFIG_SPARC */
125static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
126						int index)
127{
128	return 0;
129}
130#endif /* !CONFIG_OF */
131
132#endif /* __OF_IRQ_H */