1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * arch/arm/mach-dove/irq.c |
4 | * |
5 | * Dove IRQ handling. |
6 | */ |
7 | #include <linux/init.h> |
8 | #include <linux/irq.h> |
9 | #include <linux/io.h> |
10 | #include <asm/exception.h> |
11 | |
12 | #include <plat/irq.h> |
13 | #include <plat/orion-gpio.h> |
14 | |
15 | #include "pm.h" |
16 | #include "bridge-regs.h" |
17 | #include "common.h" |
18 | |
19 | static int __initdata gpio0_irqs[4] = { |
20 | IRQ_DOVE_GPIO_0_7, |
21 | IRQ_DOVE_GPIO_8_15, |
22 | IRQ_DOVE_GPIO_16_23, |
23 | IRQ_DOVE_GPIO_24_31, |
24 | }; |
25 | |
26 | static int __initdata gpio1_irqs[4] = { |
27 | IRQ_DOVE_HIGH_GPIO, |
28 | 0, |
29 | 0, |
30 | 0, |
31 | }; |
32 | |
33 | static int __initdata gpio2_irqs[4] = { |
34 | 0, |
35 | 0, |
36 | 0, |
37 | 0, |
38 | }; |
39 | |
40 | static void __iomem *dove_irq_base = IRQ_VIRT_BASE; |
41 | |
42 | static asmlinkage void |
43 | __exception_irq_entry dove_legacy_handle_irq(struct pt_regs *regs) |
44 | { |
45 | u32 stat; |
46 | |
47 | stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_LOW_OFF); |
48 | stat &= readl_relaxed(dove_irq_base + IRQ_MASK_LOW_OFF); |
49 | if (stat) { |
50 | unsigned int hwirq = 1 + __fls(stat); |
51 | handle_IRQ(hwirq, regs); |
52 | return; |
53 | } |
54 | stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_HIGH_OFF); |
55 | stat &= readl_relaxed(dove_irq_base + IRQ_MASK_HIGH_OFF); |
56 | if (stat) { |
57 | unsigned int hwirq = 33 + __fls(stat); |
58 | handle_IRQ(hwirq, regs); |
59 | return; |
60 | } |
61 | } |
62 | |
63 | void __init dove_init_irq(void) |
64 | { |
65 | orion_irq_init(1, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF); |
66 | orion_irq_init(33, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF); |
67 | |
68 | set_handle_irq(dove_legacy_handle_irq); |
69 | |
70 | /* |
71 | * Initialize gpiolib for GPIOs 0-71. |
72 | */ |
73 | orion_gpio_init(0, 32, DOVE_GPIO_LO_VIRT_BASE, 0, |
74 | IRQ_DOVE_GPIO_START, gpio0_irqs); |
75 | |
76 | orion_gpio_init(32, 32, DOVE_GPIO_HI_VIRT_BASE, 0, |
77 | IRQ_DOVE_GPIO_START + 32, gpio1_irqs); |
78 | |
79 | orion_gpio_init(64, 8, DOVE_GPIO2_VIRT_BASE, 0, |
80 | IRQ_DOVE_GPIO_START + 64, gpio2_irqs); |
81 | } |
82 | |