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/* 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__ */
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