1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Sandbox driver for interrupts
4 *
5 * Copyright 2019 Google LLC
6 */
7
8#include <dm.h>
9#include <irq.h>
10#include <acpi/acpi_device.h>
11#include <asm/irq.h>
12#include <asm/test.h>
13
14static int sandbox_set_polarity(struct udevice *dev, uint irq, bool active_low)
15{
16	if (irq > 10)
17		return -EINVAL;
18
19	return 0;
20}
21
22static int sandbox_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num)
23{
24	if (pmc_gpe_num > 10)
25		return -ENOENT;
26
27	return pmc_gpe_num + 1;
28}
29
30static int sandbox_snapshot_polarities(struct udevice *dev)
31{
32	return 0;
33}
34
35static int sandbox_restore_polarities(struct udevice *dev)
36{
37	return 0;
38}
39
40static int sandbox_irq_read_and_clear(struct irq *irq)
41{
42	struct sandbox_irq_priv *priv = dev_get_priv(irq->dev);
43
44	if (irq->id != SANDBOX_IRQN_PEND)
45		return -EINVAL;
46	priv->count++;
47	if (priv->pending) {
48		priv->pending = false;
49		return 1;
50	}
51
52	if (!(priv->count % 3))
53		priv->pending = true;
54
55	return 0;
56}
57
58static int sandbox_irq_of_xlate(struct irq *irq,
59				struct ofnode_phandle_args *args)
60{
61	irq->id = args->args[0];
62
63	return 0;
64}
65
66static __maybe_unused int sandbox_get_acpi(const struct irq *irq,
67					   struct acpi_irq *acpi_irq)
68{
69	acpi_irq->pin = irq->id;
70	acpi_irq->mode = ACPI_IRQ_LEVEL_TRIGGERED;
71	acpi_irq->polarity = ACPI_IRQ_ACTIVE_HIGH;
72	acpi_irq->shared = ACPI_IRQ_SHARED;
73	acpi_irq->wake = ACPI_IRQ_WAKE;
74
75	return 0;
76}
77
78static const struct irq_ops sandbox_irq_ops = {
79	.route_pmc_gpio_gpe	= sandbox_route_pmc_gpio_gpe,
80	.set_polarity		= sandbox_set_polarity,
81	.snapshot_polarities	= sandbox_snapshot_polarities,
82	.restore_polarities	= sandbox_restore_polarities,
83	.read_and_clear		= sandbox_irq_read_and_clear,
84	.of_xlate		= sandbox_irq_of_xlate,
85#if CONFIG_IS_ENABLED(ACPIGEN)
86	.get_acpi		= sandbox_get_acpi,
87#endif
88};
89
90static const struct udevice_id sandbox_irq_ids[] = {
91	{ .compatible = "sandbox,irq", SANDBOX_IRQT_BASE },
92	{ }
93};
94
95U_BOOT_DRIVER(sandbox_irq) = {
96	.name		= "sandbox_irq",
97	.id		= UCLASS_IRQ,
98	.of_match	= sandbox_irq_ids,
99	.ops		= &sandbox_irq_ops,
100	.priv_auto	= sizeof(struct sandbox_irq_priv),
101	DM_HEADER(<asm/irq.h>)
102};
103