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/* SPDX-License-Identifier: GPL-2.0 */
/*
* IRQ is a type of interrupt controller used on recent Intel SoC.
*
* Copyright 2019 Google LLC
*/
#ifndef __irq_H
#define __irq_H
/*
* Interrupt controller types available. You can find a particular one with
* irq_first_device_type()
*/
enum irq_dev_t {
X86_IRQT_BASE, /* Base controller */
X86_IRQT_ITSS, /* ITSS controller, e.g. on APL */
X86_IRQT_ACPI_GPE, /* ACPI General-Purpose Events controller */
SANDBOX_IRQT_BASE, /* Sandbox testing */
};
/**
* struct irq_ops - Operations for the IRQ
*/
struct irq_ops {
/**
* route_pmc_gpio_gpe() - Get the GPIO for an event
*
* @dev: IRQ device
* @pmc_gpe_num: Event number to check
* @returns GPIO for the event, or -ENOENT if none
*/
int (*route_pmc_gpio_gpe)(struct udevice *dev, uint pmc_gpe_num);
/**
* set_polarity() - Set the IRQ polarity
*
* @dev: IRQ device
* @irq: Interrupt number to set
* @active_low: true if active low, false for active high
* @return 0 if OK, -EINVAL if @irq is invalid
*/
int (*set_polarity)(struct udevice *dev, uint irq, bool active_low);
/**
* snapshot_polarities() - record IRQ polarities for later restore
*
* @dev: IRQ device
* @return 0
*/
int (*snapshot_polarities)(struct udevice *dev);
/**
* restore_polarities() - restore IRQ polarities
*
* @dev: IRQ device
* @return 0
*/
int (*restore_polarities)(struct udevice *dev);
};
#define irq_get_ops(dev) ((struct irq_ops *)(dev)->driver->ops)
/**
* irq_route_pmc_gpio_gpe() - Get the GPIO for an event
*
* @dev: IRQ device
* @pmc_gpe_num: Event number to check
* @returns GPIO for the event, or -ENOENT if none
*/
int irq_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num);
/**
* irq_set_polarity() - Set the IRQ polarity
*
* @dev: IRQ device
* @irq: Interrupt number to set
* @active_low: true if active low, false for active high
* @return 0 if OK, -EINVAL if @irq is invalid
*/
int irq_set_polarity(struct udevice *dev, uint irq, bool active_low);
/**
* irq_snapshot_polarities() - record IRQ polarities for later restore
*
* @dev: IRQ device
* @return 0
*/
int irq_snapshot_polarities(struct udevice *dev);
/**
* irq_restore_polarities() - restore IRQ polarities
*
* @dev: IRQ device
* @return 0
*/
int irq_restore_polarities(struct udevice *dev);
/**
* irq_first_device_type() - Get a particular interrupt controller
*
* On success this returns an activated interrupt device.
*
* @type: Type to find
* @devp: Returns the device, if found
* @return 0 if OK, -ENODEV if not found, other -ve error if uclass failed to
* probe
*/
int irq_first_device_type(enum irq_dev_t type, struct udevice **devp);
#endif
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