diff options
Diffstat (limited to 'include/linux/of_address.h')
| -rw-r--r-- | include/linux/of_address.h | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/include/linux/of_address.h b/include/linux/of_address.h new file mode 100644 index 000000000..30e40fb69 --- /dev/null +++ b/include/linux/of_address.h @@ -0,0 +1,165 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __OF_ADDRESS_H +#define __OF_ADDRESS_H +#include <linux/ioport.h> +#include <linux/errno.h> +#include <linux/of.h> +#include <linux/io.h> + +struct of_pci_range_parser { + struct device_node *node; + const __be32 *range; + const __be32 *end; + int np; + int pna; +}; + +struct of_pci_range { + u32 pci_space; + u64 pci_addr; + u64 cpu_addr; + u64 size; + u32 flags; +}; + +#define for_each_of_pci_range(parser, range) \ + for (; of_pci_range_parser_one(parser, range);) + +/* Translate a DMA address from device space to CPU space */ +extern u64 of_translate_dma_address(struct device_node *dev, + const __be32 *in_addr); + +#ifdef CONFIG_OF_ADDRESS +extern u64 of_translate_address(struct device_node *np, const __be32 *addr); +extern int of_address_to_resource(struct device_node *dev, int index, + struct resource *r); +extern struct device_node *of_find_matching_node_by_address( + struct device_node *from, + const struct of_device_id *matches, + u64 base_address); +extern void __iomem *of_iomap(struct device_node *device, int index); +void __iomem *of_io_request_and_map(struct device_node *device, + int index, const char *name); + +/* Extract an address from a device, returns the region size and + * the address space flags too. The PCI version uses a BAR number + * instead of an absolute index + */ +extern const __be32 *of_get_address(struct device_node *dev, int index, + u64 *size, unsigned int *flags); + +extern int of_pci_range_parser_init(struct of_pci_range_parser *parser, + struct device_node *node); +extern int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser, + struct device_node *node); +extern struct of_pci_range *of_pci_range_parser_one( + struct of_pci_range_parser *parser, + struct of_pci_range *range); +extern int of_dma_get_range(struct device_node *np, u64 *dma_addr, + u64 *paddr, u64 *size); +extern bool of_dma_is_coherent(struct device_node *np); +#else /* CONFIG_OF_ADDRESS */ +static inline void __iomem *of_io_request_and_map(struct device_node *device, + int index, const char *name) +{ + return IOMEM_ERR_PTR(-EINVAL); +} + +static inline u64 of_translate_address(struct device_node *np, + const __be32 *addr) +{ + return OF_BAD_ADDR; +} + +static inline struct device_node *of_find_matching_node_by_address( + struct device_node *from, + const struct of_device_id *matches, + u64 base_address) +{ + return NULL; +} + +static inline const __be32 *of_get_address(struct device_node *dev, int index, + u64 *size, unsigned int *flags) +{ + return NULL; +} + +static inline int of_pci_range_parser_init(struct of_pci_range_parser *parser, + struct device_node *node) +{ + return -ENOSYS; +} + +static inline int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser, + struct device_node *node) +{ + return -ENOSYS; +} + +static inline struct of_pci_range *of_pci_range_parser_one( + struct of_pci_range_parser *parser, + struct of_pci_range *range) +{ + return NULL; +} + +static inline int of_dma_get_range(struct device_node *np, u64 *dma_addr, + u64 *paddr, u64 *size) +{ + return -ENODEV; +} + +static inline bool of_dma_is_coherent(struct device_node *np) +{ + return false; +} +#endif /* CONFIG_OF_ADDRESS */ + +#ifdef CONFIG_OF +extern int of_address_to_resource(struct device_node *dev, int index, + struct resource *r); +void __iomem *of_iomap(struct device_node *node, int index); +#else +static inline int of_address_to_resource(struct device_node *dev, int index, + struct resource *r) +{ + return -EINVAL; +} + +static inline void __iomem *of_iomap(struct device_node *device, int index) +{ + return NULL; +} +#endif + +#if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_PCI) +extern const __be32 *of_get_pci_address(struct device_node *dev, int bar_no, + u64 *size, unsigned int *flags); +extern int of_pci_address_to_resource(struct device_node *dev, int bar, + struct resource *r); +extern int of_pci_range_to_resource(struct of_pci_range *range, + struct device_node *np, + struct resource *res); +#else /* CONFIG_OF_ADDRESS && CONFIG_PCI */ +static inline int of_pci_address_to_resource(struct device_node *dev, int bar, + struct resource *r) +{ + return -ENOSYS; +} + +static inline const __be32 *of_get_pci_address(struct device_node *dev, + int bar_no, u64 *size, unsigned int *flags) +{ + return NULL; +} +static inline int of_pci_range_to_resource(struct of_pci_range *range, + struct device_node *np, + struct resource *res) +{ + return -ENOSYS; +} +#endif /* CONFIG_OF_ADDRESS && CONFIG_PCI */ + +#endif /* __OF_ADDRESS_H */ + |