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pnp.h
/* SPDX-License-Identifier: GPL-2.0 */ /* * Linux Plug and Play Support * Copyright by Adam Belay <ambx1@neo.rr.com> * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. * Bjorn Helgaas <bjorn.helgaas@hp.com> */ #ifndef _LINUX_PNP_H #define _LINUX_PNP_H #include <linux/device.h> #include <linux/list.h> #include <linux/errno.h> #include <linux/mod_devicetable.h> #include <linux/console.h> #define PNP_NAME_LEN 50 struct pnp_protocol; struct pnp_dev; /* * Resource Management */ #ifdef CONFIG_PNP struct resource *pnp_get_resource(struct pnp_dev *dev, unsigned long type, unsigned int num); #else static inline struct resource *pnp_get_resource(struct pnp_dev *dev, unsigned long type, unsigned int num) { return NULL; } #endif static inline int pnp_resource_valid(struct resource *res) { if (res) return 1; return 0; } static inline int pnp_resource_enabled(struct resource *res) { if (res && !(res->flags & IORESOURCE_DISABLED)) return 1; return 0; } static inline resource_size_t pnp_resource_len(struct resource *res) { if (res->start == 0 && res->end == 0) return 0; return resource_size(res); } static inline resource_size_t pnp_port_start(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar); if (pnp_resource_valid(res)) return res->start; return 0; } static inline resource_size_t pnp_port_end(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar); if (pnp_resource_valid(res)) return res->end; return 0; } static inline unsigned long pnp_port_flags(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar); if (pnp_resource_valid(res)) return res->flags; return IORESOURCE_IO | IORESOURCE_AUTO; } static inline int pnp_port_valid(struct pnp_dev *dev, unsigned int bar) { return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_IO, bar)); } static inline resource_size_t pnp_port_len(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar); if (pnp_resource_valid(res)) return pnp_resource_len(res); return 0; } static inline resource_size_t pnp_mem_start(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar); if (pnp_resource_valid(res)) return res->start; return 0; } static inline resource_size_t pnp_mem_end(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar); if (pnp_resource_valid(res)) return res->end; return 0; } static inline unsigned long pnp_mem_flags(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar); if (pnp_resource_valid(res)) return res->flags; return IORESOURCE_MEM | IORESOURCE_AUTO; } static inline int pnp_mem_valid(struct pnp_dev *dev, unsigned int bar) { return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_MEM, bar)); } static inline resource_size_t pnp_mem_len(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar); if (pnp_resource_valid(res)) return pnp_resource_len(res); return 0; } static inline resource_size_t pnp_irq(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar); if (pnp_resource_valid(res)) return res->start; return -1; } static inline unsigned long pnp_irq_flags(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar); if (pnp_resource_valid(res)) return res->flags; return IORESOURCE_IRQ | IORESOURCE_AUTO; } static inline int pnp_irq_valid(struct pnp_dev *dev, unsigned int bar) { return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_IRQ, bar)); } static inline resource_size_t pnp_dma(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_DMA, bar); if (pnp_resource_valid(res)) return res->start; return -1; } static inline unsigned long pnp_dma_flags(struct pnp_dev *dev, unsigned int bar) { struct resource *res = pnp_get_resource(dev, IORESOURCE_DMA, bar); if (pnp_resource_valid(res)) return res->flags; return IORESOURCE_DMA | IORESOURCE_AUTO; } static inline int pnp_dma_valid(struct pnp_dev *dev, unsigned int bar) { return pnp_resource_valid(pnp_get_resource(dev, IORESOURCE_DMA, bar)); } /* * Device Management */ struct pnp_card { struct device dev; /* Driver Model device interface */ unsigned char number; /* used as an index, must be unique */ struct list_head global_list; /* node in global list of cards */ struct list_head protocol_list; /* node in protocol's list of cards */ struct list_head devices; /* devices attached to the card */ struct pnp_protocol *protocol; struct pnp_id *id; /* contains supported EISA IDs */ char name[PNP_NAME_LEN]; /* contains a human-readable name */ unsigned char pnpver; /* Plug & Play version */ unsigned char productver; /* product version */ unsigned int serial; /* serial number */ unsigned char checksum; /* if zero - checksum passed */ struct proc_dir_entry *procdir; /* directory entry in /proc/bus/isapnp */ }; #define global_to_pnp_card(n) list_entry(n, struct pnp_card, global_list) #define protocol_to_pnp_card(n) list_entry(n, struct pnp_card, protocol_list) #define to_pnp_card(n) container_of(n, struct pnp_card, dev) #define pnp_for_each_card(card) \ list_for_each_entry(card, &pnp_cards, global_list) struct pnp_card_link { struct pnp_card *card; struct pnp_card_driver *driver; void *driver_data; pm_message_t pm_state; }; static inline void *pnp_get_card_drvdata(struct pnp_card_link *pcard) { return pcard->driver_data; } static inline void pnp_set_card_drvdata(struct pnp_card_link *pcard, void *data) { pcard->driver_data = data; } struct pnp_dev { struct device dev; /* Driver Model device interface */ u64 dma_mask; unsigned int number; /* used as an index, must be unique */ int status; struct list_head global_list; /* node in global list of devices */ struct list_head protocol_list; /* node in list of device's protocol */ struct list_head card_list; /* node in card's list of devices */ struct list_head rdev_list; /* node in cards list of requested devices */ struct pnp_protocol *protocol; struct pnp_card *card; /* card the device is attached to, none if NULL */ struct pnp_driver *driver; struct pnp_card_link *card_link; struct pnp_id *id; /* supported EISA IDs */ int active; int capabilities; unsigned int num_dependent_sets; struct list_head resources; struct list_head options; char name[PNP_NAME_LEN]; /* contains a human-readable name */ int flags; /* used by protocols */ struct proc_dir_entry *procent; /* device entry in /proc/bus/isapnp */ void *data; }; #define global_to_pnp_dev(n) list_entry(n, struct pnp_dev, global_list) #define card_to_pnp_dev(n) list_entry(n, struct pnp_dev, card_list) #define protocol_to_pnp_dev(n) list_entry(n, struct pnp_dev, protocol_list) #define to_pnp_dev(n) container_of(n, struct pnp_dev, dev) #define pnp_for_each_dev(dev) list_for_each_entry(dev, &pnp_global, global_list) #define card_for_each_dev(card, dev) \ list_for_each_entry(dev, &(card)->devices, card_list) #define pnp_dev_name(dev) (dev)->name static inline void *pnp_get_drvdata(struct pnp_dev *pdev) { return dev_get_drvdata(&pdev->dev); } static inline void pnp_set_drvdata(struct pnp_dev *pdev, void *data) { dev_set_drvdata(&pdev->dev, data); } struct pnp_fixup { char id[7]; void (*quirk_function) (struct pnp_dev *dev); /* fixup function */ }; /* config parameters */ #define PNP_CONFIG_NORMAL 0x0001 #define PNP_CONFIG_FORCE 0x0002 /* disables validity checking */ /* capabilities */ #define PNP_READ 0x0001 #define PNP_WRITE 0x0002 #define PNP_DISABLE 0x0004 #define PNP_CONFIGURABLE 0x0008 #define PNP_REMOVABLE 0x0010 #define PNP_CONSOLE 0x0020 #define pnp_can_read(dev) (((dev)->protocol->get) && \ ((dev)->capabilities & PNP_READ)) #define pnp_can_write(dev) (((dev)->protocol->set) && \ ((dev)->capabilities & PNP_WRITE)) #define pnp_can_disable(dev) (((dev)->protocol->disable) && \ ((dev)->capabilities & PNP_DISABLE) && \ (!((dev)->capabilities & PNP_CONSOLE) || \ console_suspend_enabled)) #define pnp_can_configure(dev) ((!(dev)->active) && \ ((dev)->capabilities & PNP_CONFIGURABLE)) #define pnp_can_suspend(dev) (((dev)->protocol->suspend) && \ (!((dev)->capabilities & PNP_CONSOLE) || \ console_suspend_enabled)) #ifdef CONFIG_ISAPNP extern struct pnp_protocol isapnp_protocol; #define pnp_device_is_isapnp(dev) ((dev)->protocol == (&isapnp_protocol)) #else #define pnp_device_is_isapnp(dev) 0 #endif extern struct mutex pnp_res_mutex; #ifdef CONFIG_PNPBIOS extern struct pnp_protocol pnpbios_protocol; extern bool arch_pnpbios_disabled(void); #define pnp_device_is_pnpbios(dev) ((dev)->protocol == (&pnpbios_protocol)) #else #define pnp_device_is_pnpbios(dev) 0 #define arch_pnpbios_disabled() false #endif #ifdef CONFIG_PNPACPI extern struct pnp_protocol pnpacpi_protocol; static inline struct acpi_device *pnp_acpi_device(struct pnp_dev *dev) { if (dev->protocol == &pnpacpi_protocol) return dev->data; return NULL; } #else #define pnp_acpi_device(dev) 0 #endif /* status */ #define PNP_READY 0x0000 #define PNP_ATTACHED 0x0001 #define PNP_BUSY 0x0002 #define PNP_FAULTY 0x0004 /* isapnp specific macros */ #define isapnp_card_number(dev) ((dev)->card ? (dev)->card->number : -1) #define isapnp_csn_number(dev) ((dev)->number) /* * Driver Management */ struct pnp_id { char id[PNP_ID_LEN]; struct pnp_id *next; }; struct pnp_driver { const char *name; const struct pnp_device_id *id_table; unsigned int flags; int (*probe) (struct pnp_dev *dev, const struct pnp_device_id *dev_id); void (*remove) (struct pnp_dev *dev); void (*shutdown) (struct pnp_dev *dev); int (*suspend) (struct pnp_dev *dev, pm_message_t state); int (*resume) (struct pnp_dev *dev); struct device_driver driver; }; #define to_pnp_driver(drv) container_of(drv, struct pnp_driver, driver) struct pnp_card_driver { struct list_head global_list; char *name; const struct pnp_card_device_id *id_table; unsigned int flags; int (*probe) (struct pnp_card_link *card, const struct pnp_card_device_id *card_id); void (*remove) (struct pnp_card_link *card); int (*suspend) (struct pnp_card_link *card, pm_message_t state); int (*resume) (struct pnp_card_link *card); struct pnp_driver link; }; #define to_pnp_card_driver(drv) container_of(drv, struct pnp_card_driver, link) /* pnp driver flags */ #define PNP_DRIVER_RES_DO_NOT_CHANGE 0x0001 /* do not change the state of the device */ #define PNP_DRIVER_RES_DISABLE 0x0003 /* ensure the device is disabled */ /* * Protocol Management */ struct pnp_protocol { struct list_head protocol_list; char *name; /* resource control functions */ int (*get) (struct pnp_dev *dev); int (*set) (struct pnp_dev *dev); int (*disable) (struct pnp_dev *dev); /* protocol specific suspend/resume */ bool (*can_wakeup) (struct pnp_dev *dev); int (*suspend) (struct pnp_dev *dev, pm_message_t state); int (*resume) (struct pnp_dev *dev); /* used by pnp layer only (look but don't touch) */ unsigned char number; /* protocol number */ struct device dev; /* link to driver model */ struct list_head cards; struct list_head devices; }; #define to_pnp_protocol(n) list_entry(n, struct pnp_protocol, protocol_list) #define protocol_for_each_card(protocol, card) \ list_for_each_entry(card, &(protocol)->cards, protocol_list) #define protocol_for_each_dev(protocol, dev) \ list_for_each_entry(dev, &(protocol)->devices, protocol_list) #if defined(CONFIG_PNP) /* device management */ int pnp_device_attach(struct pnp_dev *pnp_dev); void pnp_device_detach(struct pnp_dev *pnp_dev); extern struct list_head pnp_global; extern int pnp_platform_devices; /* multidevice card support */ struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, const char *id, struct pnp_dev *from); void pnp_release_card_device(struct pnp_dev *dev); int pnp_register_card_driver(struct pnp_card_driver *drv); void pnp_unregister_card_driver(struct pnp_card_driver *drv); extern struct list_head pnp_cards; /* resource management */ int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t base, resource_size_t size); int pnp_auto_config_dev(struct pnp_dev *dev); int pnp_start_dev(struct pnp_dev *dev); int pnp_stop_dev(struct pnp_dev *dev); int pnp_activate_dev(struct pnp_dev *dev); int pnp_disable_dev(struct pnp_dev *dev); int pnp_range_reserved(resource_size_t start, resource_size_t end); /* protocol helpers */ int pnp_is_active(struct pnp_dev *dev); int compare_pnp_id(struct pnp_id *pos, const char *id); int pnp_register_driver(struct pnp_driver *drv); void pnp_unregister_driver(struct pnp_driver *drv); #else /* device management */ static inline int pnp_device_attach(struct pnp_dev *pnp_dev) { return -ENODEV; } static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { } #define pnp_platform_devices 0 /* multidevice card support */ static inline struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink, const char *id, struct pnp_dev *from) { return NULL; } static inline void pnp_release_card_device(struct pnp_dev *dev) { } static inline int pnp_register_card_driver(struct pnp_card_driver *drv) { return -ENODEV; } static inline void pnp_unregister_card_driver(struct pnp_card_driver *drv) { } /* resource management */ static inline int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t base, resource_size_t size) { return 0; } static inline int pnp_auto_config_dev(struct pnp_dev *dev) { return -ENODEV; } static inline int pnp_start_dev(struct pnp_dev *dev) { return -ENODEV; } static inline int pnp_stop_dev(struct pnp_dev *dev) { return -ENODEV; } static inline int pnp_activate_dev(struct pnp_dev *dev) { return -ENODEV; } static inline int pnp_disable_dev(struct pnp_dev *dev) { return -ENODEV; } static inline int pnp_range_reserved(resource_size_t start, resource_size_t end) { return 0; } /* protocol helpers */ static inline int pnp_is_active(struct pnp_dev *dev) { return 0; } static inline int compare_pnp_id(struct pnp_id *pos, const char *id) { return -ENODEV; } static inline int pnp_register_driver(struct pnp_driver *drv) { return -ENODEV; } static inline void pnp_unregister_driver(struct pnp_driver *drv) { } #endif /* CONFIG_PNP */ /** * module_pnp_driver() - Helper macro for registering a PnP driver * @__pnp_driver: pnp_driver struct * * Helper macro for PnP drivers which do not do anything special in module * init/exit. This eliminates a lot of boilerplate. Each module may only * use this macro once, and calling it replaces module_init() and module_exit() */ #define module_pnp_driver(__pnp_driver) \ module_driver(__pnp_driver, pnp_register_driver, \ pnp_unregister_driver) #endif /* _LINUX_PNP_H */
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