freebsd-skq/sys/dev/bhnd/bhndb/bhndb_bus_if.m

#-
# Copyright (c) 2015 Landon Fuller <landon@landonf.org>
# All rights reserved.
#
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# modification, are permitted provided that the following conditions
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# $FreeBSD$

#include <sys/types.h>
#include <sys/bus.h>

#
# Parent bus interface required by attached bhndb bridge devices.
#

INTERFACE bhndb_bus;

HEADER {
	struct bhnd_core_info;
	struct bhndb_hwcfg;
	struct bhndb_hw;
};

CODE {
	#include <sys/systm.h>

	static const struct bhnd_chipid *
	bhndb_null_get_chipid(device_t dev, device_t child)
	{
		return (NULL);
	}

	static const struct bhndb_hwcfg *
	bhndb_null_get_generic_hwcfg(device_t dev, device_t child)
	{
		panic("bhndb_get_generic_hwcfg unimplemented");
	}

	static const struct bhndb_hw *
	bhndb_null_get_hardware_table(device_t dev, device_t child)
	{
		panic("bhndb_get_hardware_table unimplemented");
	}

	static bool
	bhndb_null_is_core_disabled(device_t dev, device_t child,
	    struct bhnd_core_info *core)
	{
		return (true);
	}
}

/**
 * Return a generic hardware configuration to be used by
 * the bhndb bridge device to enumerate attached devices.
 *
 * @param dev The parent device.
 * @param child The attached bhndb device.
 *
 * @retval bhndb_hwcfg The configuration to use for bus enumeration.
 */
METHOD const struct bhndb_hwcfg * get_generic_hwcfg {
	device_t dev;
	device_t child;
} DEFAULT bhndb_null_get_generic_hwcfg;

/**
 * Provide chip identification information to be used by a @p child during
 * device enumeration.
 * 
 * May return NULL if the device includes a ChipCommon core.
 *
 * @param dev The parent device.
 * @param child The attached bhndb device.
 */
METHOD const struct bhnd_chipid * get_chipid {
	device_t dev;
	device_t child;
} DEFAULT bhndb_null_get_chipid;

/**
 * Return the hardware specification table to be used when identifying the
 * bridge's full hardware configuration.
 *
 * @param dev The parent device.
 * @param child The attached bhndb device.
 */
METHOD const struct bhndb_hw * get_hardware_table {
	device_t dev;
	device_t child;
} DEFAULT bhndb_null_get_hardware_table;

/**
 * Return true if the hardware required by @p core is unpopulated or
 * otherwise unusable.
 *
 * In some cases, the core's pins may be left floating, or the hardware
 * may otherwise be non-functional; this method allows the parent device
 * to explicitly specify whether @p core should be disabled.
 *
 * @param dev The parent device.
 * @param child The attached bhndb device.
 * @param core A core discovered on @p child.
 */
METHOD bool is_core_disabled {
	device_t dev;
	device_t child;
	struct bhnd_core_info *core;
} DEFAULT bhndb_null_is_core_disabled;