1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Sandbox driver for interrupts
4 *
5 * Copyright 2019 Google LLC
6 */
7
8 #include <common.h>
9 #include <dm.h>
10 #include <irq.h>
11 #include <acpi/acpi_device.h>
12 #include <asm/irq.h>
13 #include <asm/test.h>
14
sandbox_set_polarity(struct udevice * dev,uint irq,bool active_low)15 static int sandbox_set_polarity(struct udevice *dev, uint irq, bool active_low)
16 {
17 if (irq > 10)
18 return -EINVAL;
19
20 return 0;
21 }
22
sandbox_route_pmc_gpio_gpe(struct udevice * dev,uint pmc_gpe_num)23 static int sandbox_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num)
24 {
25 if (pmc_gpe_num > 10)
26 return -ENOENT;
27
28 return pmc_gpe_num + 1;
29 }
30
sandbox_snapshot_polarities(struct udevice * dev)31 static int sandbox_snapshot_polarities(struct udevice *dev)
32 {
33 return 0;
34 }
35
sandbox_restore_polarities(struct udevice * dev)36 static int sandbox_restore_polarities(struct udevice *dev)
37 {
38 return 0;
39 }
40
sandbox_irq_read_and_clear(struct irq * irq)41 static int sandbox_irq_read_and_clear(struct irq *irq)
42 {
43 struct sandbox_irq_priv *priv = dev_get_priv(irq->dev);
44
45 if (irq->id != SANDBOX_IRQN_PEND)
46 return -EINVAL;
47 priv->count++;
48 if (priv->pending) {
49 priv->pending = false;
50 return 1;
51 }
52
53 if (!(priv->count % 3))
54 priv->pending = true;
55
56 return 0;
57 }
58
sandbox_irq_of_xlate(struct irq * irq,struct ofnode_phandle_args * args)59 static int sandbox_irq_of_xlate(struct irq *irq,
60 struct ofnode_phandle_args *args)
61 {
62 irq->id = args->args[0];
63
64 return 0;
65 }
66
sandbox_get_acpi(const struct irq * irq,struct acpi_irq * acpi_irq)67 static __maybe_unused int sandbox_get_acpi(const struct irq *irq,
68 struct acpi_irq *acpi_irq)
69 {
70 acpi_irq->pin = irq->id;
71 acpi_irq->mode = ACPI_IRQ_LEVEL_TRIGGERED;
72 acpi_irq->polarity = ACPI_IRQ_ACTIVE_HIGH;
73 acpi_irq->shared = ACPI_IRQ_SHARED;
74 acpi_irq->wake = ACPI_IRQ_WAKE;
75
76 return 0;
77 }
78
79 static const struct irq_ops sandbox_irq_ops = {
80 .route_pmc_gpio_gpe = sandbox_route_pmc_gpio_gpe,
81 .set_polarity = sandbox_set_polarity,
82 .snapshot_polarities = sandbox_snapshot_polarities,
83 .restore_polarities = sandbox_restore_polarities,
84 .read_and_clear = sandbox_irq_read_and_clear,
85 .of_xlate = sandbox_irq_of_xlate,
86 #if CONFIG_IS_ENABLED(ACPIGEN)
87 .get_acpi = sandbox_get_acpi,
88 #endif
89 };
90
91 static const struct udevice_id sandbox_irq_ids[] = {
92 { .compatible = "sandbox,irq", SANDBOX_IRQT_BASE },
93 { }
94 };
95
96 U_BOOT_DRIVER(sandbox_irq) = {
97 .name = "sandbox_irq",
98 .id = UCLASS_IRQ,
99 .of_match = sandbox_irq_ids,
100 .ops = &sandbox_irq_ops,
101 .priv_auto = sizeof(struct sandbox_irq_priv),
102 DM_HEADER(<asm/irq.h>)
103 };
104