/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __MACIO_ASIC_H__ #define __MACIO_ASIC_H__ #ifdef __KERNEL__ #include <linux/of_device.h> extern struct bus_type macio_bus_type; /* MacIO device driver is defined later */ struct macio_driver; struct macio_chip; #define MACIO_DEV_COUNT_RESOURCES 8 #define MACIO_DEV_COUNT_IRQS 8 /* * the macio_bus structure is used to describe a "virtual" bus * within a MacIO ASIC. It's typically provided by a macio_pci_asic * PCI device, but could be provided differently as well (nubus * machines using a fake OF tree). * * The pdev field can be NULL on non-PCI machines */ struct macio_bus { struct macio_chip *chip; /* macio_chip (private use) */ int index; /* macio chip index in system */ #ifdef CONFIG_PCI struct pci_dev *pdev; /* PCI device hosting this bus */ #endif }; /* * the macio_dev structure is used to describe a device * within an Apple MacIO ASIC. */ struct macio_dev { struct macio_bus *bus; /* macio bus this device is on */ struct macio_dev *media_bay; /* Device is part of a media bay */ struct platform_device ofdev; struct device_dma_parameters dma_parms; /* ide needs that */ int n_resources; struct resource resource[MACIO_DEV_COUNT_RESOURCES]; int n_interrupts; struct resource interrupt[MACIO_DEV_COUNT_IRQS]; }; #define to_macio_device(d) container_of(d, struct macio_dev, ofdev.dev) #define of_to_macio_device(d) container_of(d, struct macio_dev, ofdev) extern struct macio_dev *macio_dev_get(struct macio_dev *dev); extern void macio_dev_put(struct macio_dev *dev); /* * Accessors to resources & interrupts and other device * fields */ static inline int macio_resource_count(struct macio_dev *dev) { return dev->n_resources; } static inline unsigned long macio_resource_start(struct macio_dev *dev, int resource_no) { return dev->resource[resource_no].start; } static inline unsigned long macio_resource_end(struct macio_dev *dev, int resource_no) { return dev->resource[resource_no].end; } static inline unsigned long macio_resource_len(struct macio_dev *dev, int resource_no) { struct resource *res = &dev->resource[resource_no]; if (res->start == 0 || res->end == 0 || res->end < res->start) return 0; return resource_size(res); } extern int macio_enable_devres(struct macio_dev *dev); extern int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name); extern void macio_release_resource(struct macio_dev *dev, int resource_no); extern int macio_request_resources(struct macio_dev *dev, const char *name); extern void macio_release_resources(struct macio_dev *dev); static inline int macio_irq_count(struct macio_dev *dev) { return dev->n_interrupts; } static inline int macio_irq(struct macio_dev *dev, int irq_no) { return dev->interrupt[irq_no].start; } static inline void macio_set_drvdata(struct macio_dev *dev, void *data) { dev_set_drvdata(&dev->ofdev.dev, data); } static inline void* macio_get_drvdata(struct macio_dev *dev) { return dev_get_drvdata(&dev->ofdev.dev); } static inline struct device_node *macio_get_of_node(struct macio_dev *mdev) { return mdev->ofdev.dev.of_node; } #ifdef CONFIG_PCI static inline struct pci_dev *macio_get_pci_dev(struct macio_dev *mdev) { return mdev->bus->pdev; } #endif /* * A driver for a mac-io chip based device */ struct macio_driver { int (*probe)(struct macio_dev* dev, const struct of_device_id *match); int (*remove)(struct macio_dev* dev); int (*suspend)(struct macio_dev* dev, pm_message_t state); int (*resume)(struct macio_dev* dev); int (*shutdown)(struct macio_dev* dev); #ifdef CONFIG_PMAC_MEDIABAY void (*mediabay_event)(struct macio_dev* dev, int mb_state); #endif struct device_driver driver; }; #define to_macio_driver(drv) container_of(drv,struct macio_driver, driver) extern int macio_register_driver(struct macio_driver *); extern void macio_unregister_driver(struct macio_driver *); #endif /* __KERNEL__ */ #endif /* __MACIO_ASIC_H__ */