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/arch/powerpc/include/asm/macio.h

https://github.com/aicjofs/android_kernel_lge_v500_20d
C Header | 144 lines | 99 code | 25 blank | 20 comment | 5 complexity | 6c8d19bb9f71ebd46110e2ede916f9f7 MD5 | raw file
  1#ifndef __MACIO_ASIC_H__
  2#define __MACIO_ASIC_H__
  3#ifdef __KERNEL__
  4
  5#include <linux/of_device.h>
  6
  7extern struct bus_type macio_bus_type;
  8
  9/* MacIO device driver is defined later */
 10struct macio_driver;
 11struct macio_chip;
 12
 13#define MACIO_DEV_COUNT_RESOURCES	8
 14#define MACIO_DEV_COUNT_IRQS		8
 15
 16/*
 17 * the macio_bus structure is used to describe a "virtual" bus
 18 * within a MacIO ASIC. It's typically provided by a macio_pci_asic
 19 * PCI device, but could be provided differently as well (nubus
 20 * machines using a fake OF tree).
 21 *
 22 * The pdev field can be NULL on non-PCI machines
 23 */
 24struct macio_bus
 25{
 26	struct macio_chip	*chip;		/* macio_chip (private use) */
 27	int			index;		/* macio chip index in system */
 28#ifdef CONFIG_PCI
 29	struct pci_dev		*pdev;		/* PCI device hosting this bus */
 30#endif
 31};
 32
 33/*
 34 * the macio_dev structure is used to describe a device
 35 * within an Apple MacIO ASIC.
 36 */
 37struct macio_dev
 38{
 39	struct macio_bus	*bus;		/* macio bus this device is on */
 40	struct macio_dev	*media_bay;	/* Device is part of a media bay */
 41	struct platform_device	ofdev;
 42	struct device_dma_parameters dma_parms; /* ide needs that */
 43	int			n_resources;
 44	struct resource		resource[MACIO_DEV_COUNT_RESOURCES];
 45	int			n_interrupts;
 46	struct resource		interrupt[MACIO_DEV_COUNT_IRQS];
 47};
 48#define	to_macio_device(d) container_of(d, struct macio_dev, ofdev.dev)
 49#define	of_to_macio_device(d) container_of(d, struct macio_dev, ofdev)
 50
 51extern struct macio_dev *macio_dev_get(struct macio_dev *dev);
 52extern void macio_dev_put(struct macio_dev *dev);
 53
 54/*
 55 * Accessors to resources & interrupts and other device
 56 * fields
 57 */
 58
 59static inline int macio_resource_count(struct macio_dev *dev)
 60{
 61	return dev->n_resources;
 62}
 63
 64static inline unsigned long macio_resource_start(struct macio_dev *dev, int resource_no)
 65{
 66	return dev->resource[resource_no].start;
 67}
 68
 69static inline unsigned long macio_resource_end(struct macio_dev *dev, int resource_no)
 70{
 71	return dev->resource[resource_no].end;
 72}
 73
 74static inline unsigned long macio_resource_len(struct macio_dev *dev, int resource_no)
 75{
 76	struct resource *res = &dev->resource[resource_no];
 77	if (res->start == 0 || res->end == 0 || res->end < res->start)
 78		return 0;
 79	return resource_size(res);
 80}
 81
 82extern int macio_enable_devres(struct macio_dev *dev);
 83
 84extern int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name);
 85extern void macio_release_resource(struct macio_dev *dev, int resource_no);
 86extern int macio_request_resources(struct macio_dev *dev, const char *name);
 87extern void macio_release_resources(struct macio_dev *dev);
 88
 89static inline int macio_irq_count(struct macio_dev *dev)
 90{
 91	return dev->n_interrupts;
 92}
 93
 94static inline int macio_irq(struct macio_dev *dev, int irq_no)
 95{
 96	return dev->interrupt[irq_no].start;
 97}
 98
 99static inline void macio_set_drvdata(struct macio_dev *dev, void *data)
100{
101	dev_set_drvdata(&dev->ofdev.dev, data);
102}
103
104static inline void* macio_get_drvdata(struct macio_dev *dev)
105{
106	return dev_get_drvdata(&dev->ofdev.dev);
107}
108
109static inline struct device_node *macio_get_of_node(struct macio_dev *mdev)
110{
111	return mdev->ofdev.dev.of_node;
112}
113
114#ifdef CONFIG_PCI
115static inline struct pci_dev *macio_get_pci_dev(struct macio_dev *mdev)
116{
117	return mdev->bus->pdev;
118}
119#endif
120
121/*
122 * A driver for a mac-io chip based device
123 */
124struct macio_driver
125{
126	int	(*probe)(struct macio_dev* dev, const struct of_device_id *match);
127	int	(*remove)(struct macio_dev* dev);
128
129	int	(*suspend)(struct macio_dev* dev, pm_message_t state);
130	int	(*resume)(struct macio_dev* dev);
131	int	(*shutdown)(struct macio_dev* dev);
132
133#ifdef CONFIG_PMAC_MEDIABAY
134	void	(*mediabay_event)(struct macio_dev* dev, int mb_state);
135#endif
136	struct device_driver	driver;
137};
138#define	to_macio_driver(drv) container_of(drv,struct macio_driver, driver)
139
140extern int macio_register_driver(struct macio_driver *);
141extern void macio_unregister_driver(struct macio_driver *);
142
143#endif /* __KERNEL__ */
144#endif /* __MACIO_ASIC_H__ */