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#ifndef _IPXE_DEVTREE_H
#define _IPXE_DEVTREE_H
/** @file
*
* Devicetree bus
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <ipxe/device.h>
#include <ipxe/dma.h>
#include <ipxe/fdt.h>
/** A devicetree device */
struct dt_device {
/** Device name */
const char *name;
/** Generic device */
struct device dev;
/** DMA device */
struct dma_device dma;
/** Driver for this device */
struct dt_driver *driver;
/** Driver-private data */
void *priv;
};
/** A devicetree driver */
struct dt_driver {
/** Driver name */
const char *name;
/** Compatible programming model identifiers */
const char **ids;
/** Number of compatible programming model identifiers */
unsigned int id_count;
/**
* Probe device
*
* @v dt Devicetree device
* @v offset Starting node offset
* @ret rc Return status code
*/
int ( * probe ) ( struct dt_device *dt, unsigned int offset );
/**
* Remove device
*
* @v dt Devicetree device
*/
void ( * remove ) ( struct dt_device *dt );
};
/** Devicetree driver table */
#define DT_DRIVERS __table ( struct dt_driver, "dt_drivers" )
/** Declare a devicetree driver */
#define __dt_driver __table_entry ( DT_DRIVERS, 01 )
/**
* Set devicetree driver-private data
*
* @v dt Devicetree device
* @v priv Private data
*/
static inline void dt_set_drvdata ( struct dt_device *dt, void *priv ) {
dt->priv = priv;
}
/**
* Get devicetree driver-private data
*
* @v dt Devicetree device
* @ret priv Private data
*/
static inline void * dt_get_drvdata ( struct dt_device *dt ) {
return dt->priv;
}
/**
* Get devicetree parent device
*
* @v dt Devicetree device
* @ret parent Parent devicetree device
*/
static inline struct dt_device * dt_parent ( struct dt_device *dt ) {
return container_of ( dt->dev.parent, struct dt_device, dev );
}
extern void * dt_ioremap ( struct dt_device *dt, unsigned int offset,
unsigned int index, size_t len );
extern int dt_probe_node ( struct device *parent, unsigned int offset );
extern void dt_remove_node ( struct device *parent );
extern int dt_probe_children ( struct dt_device *parent, unsigned int offset );
extern void dt_remove_children ( struct dt_device *parent );
#endif /* _IPXE_DEVTREE_H */
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