linux/include/linux/isa.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * ISA bus.
 */

#ifndef __LINUX_ISA_H
#define __LINUX_ISA_H

#include <linux/device.h>
#include <linux/errno.h>
#include <linux/kernel.h>

struct isa_driver { … };

#define to_isa_driver(x) …

#ifdef CONFIG_ISA_BUS_API
int isa_register_driver(struct isa_driver *, unsigned int);
void isa_unregister_driver(struct isa_driver *);
#else
static inline int isa_register_driver(struct isa_driver *d, unsigned int i)
{
	return -ENODEV;
}

static inline void isa_unregister_driver(struct isa_driver *d)
{
}
#endif

#define module_isa_driver_init(__isa_driver, __num_isa_dev) …

#define module_isa_driver_with_irq_init(__isa_driver, __num_isa_dev, __num_irq) …

#define module_isa_driver_exit(__isa_driver) …

/**
 * module_isa_driver() - Helper macro for registering a ISA driver
 * @__isa_driver: isa_driver struct
 * @__num_isa_dev: number of devices to register
 *
 * Helper macro for ISA drivers which do not do anything special in module
 * init/exit. This eliminates a lot of boilerplate code. Each module may only
 * use this macro once, and calling it replaces module_init and module_exit.
 */
#define module_isa_driver(__isa_driver, __num_isa_dev) …

/**
 * module_isa_driver_with_irq() - Helper macro for registering an ISA driver with irq
 * @__isa_driver: isa_driver struct
 * @__num_isa_dev: number of devices to register
 * @__num_irq: number of IRQ to register
 *
 * Helper macro for ISA drivers with irq that do not do anything special in
 * module init/exit. Each module may only use this macro once, and calling it
 * replaces module_init and module_exit.
 */
#define module_isa_driver_with_irq(__isa_driver, __num_isa_dev, __num_irq) …

/**
 * max_num_isa_dev() - Maximum possible number registered of an ISA device
 * @__ida_dev_ext: ISA device address extent
 *
 * The highest base address possible for an ISA device is 0x3FF; this results in
 * 1024 possible base addresses. Dividing the number of possible base addresses
 * by the address extent taken by each device results in the maximum number of
 * devices on a system.
 */
#define max_num_isa_dev(__isa_dev_ext) …

#endif /* __LINUX_ISA_H */