diff options
Diffstat (limited to 'include/linux/of_irq.h')
| -rw-r--r-- | include/linux/of_irq.h | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h new file mode 100644 index 000000000..2a64d8cec --- /dev/null +++ b/include/linux/of_irq.h @@ -0,0 +1,171 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __OF_IRQ_H +#define __OF_IRQ_H + +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/ioport.h> +#include <linux/of.h> + +typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *); + +struct of_imap_parser { + struct device_node *node; + const __be32 *imap; + const __be32 *imap_end; + u32 parent_offset; +}; + +struct of_imap_item { + struct of_phandle_args parent_args; + u32 child_imap_count; + u32 child_imap[16]; /* Arbitrary size. + * Should be #address-cells + #interrupt-cells but + * avoid using allocation and so, expect that 16 + * should be enough + */ +}; + +/* + * If the iterator is exited prematurely (break, goto, return) of_node_put() has + * to be called on item.parent_args.np + */ +#define for_each_of_imap_item(parser, item) \ + for (; of_imap_parser_one(parser, item);) + +/* + * Workarounds only applied to 32bit powermac machines + */ +#define OF_IMAP_OLDWORLD_MAC 0x00000001 +#define OF_IMAP_NO_PHANDLE 0x00000002 + +#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC) +extern unsigned int of_irq_workarounds; +extern struct device_node *of_irq_dflt_pic; +int of_irq_parse_oldworld(const struct device_node *device, int index, + struct of_phandle_args *out_irq); +#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */ +#define of_irq_workarounds (0) +#define of_irq_dflt_pic (NULL) +static inline int of_irq_parse_oldworld(const struct device_node *device, int index, + struct of_phandle_args *out_irq) +{ + return -EINVAL; +} +#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */ + +extern int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq); +extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data); +extern int of_irq_to_resource(struct device_node *dev, int index, + struct resource *r); + +#ifdef CONFIG_OF_IRQ +extern void of_irq_init(const struct of_device_id *matches); +extern int of_irq_parse_one(struct device_node *device, int index, + struct of_phandle_args *out_irq); +extern int of_irq_count(struct device_node *dev); +extern int of_irq_get(struct device_node *dev, int index); +extern const struct cpumask *of_irq_get_affinity(struct device_node *dev, + int index); +extern int of_irq_get_byname(struct device_node *dev, const char *name); +extern int of_irq_to_resource_table(struct device_node *dev, + struct resource *res, int nr_irqs); +extern struct device_node *of_irq_find_parent(struct device_node *child); +extern int of_imap_parser_init(struct of_imap_parser *parser, + struct device_node *node, + struct of_imap_item *item); +extern struct of_imap_item *of_imap_parser_one(struct of_imap_parser *parser, + struct of_imap_item *item); +extern struct irq_domain *of_msi_get_domain(struct device *dev, + const struct device_node *np, + enum irq_domain_bus_token token); +extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev, + u32 id, + u32 bus_token); +extern void of_msi_configure(struct device *dev, const struct device_node *np); +extern u32 of_msi_xlate(struct device *dev, struct device_node **msi_np, u32 id_in); +#else +static inline void of_irq_init(const struct of_device_id *matches) +{ +} +static inline int of_irq_parse_one(struct device_node *device, int index, + struct of_phandle_args *out_irq) +{ + return -EINVAL; +} +static inline int of_irq_count(struct device_node *dev) +{ + return 0; +} +static inline int of_irq_get(struct device_node *dev, int index) +{ + return 0; +} +static inline int of_irq_get_byname(struct device_node *dev, const char *name) +{ + return 0; +} +static inline const struct cpumask *of_irq_get_affinity(struct device_node *dev, + int index) +{ + return NULL; +} +static inline int of_irq_to_resource_table(struct device_node *dev, + struct resource *res, int nr_irqs) +{ + return 0; +} +static inline void *of_irq_find_parent(struct device_node *child) +{ + return NULL; +} +static inline int of_imap_parser_init(struct of_imap_parser *parser, + struct device_node *node, + struct of_imap_item *item) +{ + return -ENOSYS; +} +static inline struct of_imap_item *of_imap_parser_one(struct of_imap_parser *parser, + struct of_imap_item *item) +{ + return NULL; +} +static inline struct irq_domain *of_msi_get_domain(struct device *dev, + struct device_node *np, + enum irq_domain_bus_token token) +{ + return NULL; +} +static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev, + u32 id, u32 bus_token) +{ + return NULL; +} +static inline void of_msi_configure(struct device *dev, struct device_node *np) +{ +} +static inline u32 of_msi_xlate(struct device *dev, struct device_node **msi_np, u32 id_in) +{ + return id_in; +} +#endif + +#if defined(CONFIG_OF_IRQ) || defined(CONFIG_SPARC) +/* + * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC + * implements it differently. However, the prototype is the same for all, + * so declare it here regardless of the CONFIG_OF_IRQ setting. + */ +extern unsigned int irq_of_parse_and_map(struct device_node *node, int index); + +#else /* !CONFIG_OF && !CONFIG_SPARC */ +static inline unsigned int irq_of_parse_and_map(struct device_node *dev, + int index) +{ + return 0; +} +#endif /* !CONFIG_OF */ + +#endif /* __OF_IRQ_H */ |