1*0fdebc5eSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2edabd38eSSaeed Bishara /*
3edabd38eSSaeed Bishara * arch/arm/mach-dove/irq.c
4edabd38eSSaeed Bishara *
5edabd38eSSaeed Bishara * Dove IRQ handling.
6edabd38eSSaeed Bishara */
7edabd38eSSaeed Bishara #include <linux/init.h>
8edabd38eSSaeed Bishara #include <linux/irq.h>
9edabd38eSSaeed Bishara #include <linux/io.h>
10b8cd337cSArnd Bergmann #include <asm/exception.h>
11ce78179eSArnd Bergmann
12edabd38eSSaeed Bishara #include <plat/irq.h>
13ce91574cSRob Herring #include <plat/orion-gpio.h>
14ce78179eSArnd Bergmann
15ce78179eSArnd Bergmann #include "pm.h"
16ce78179eSArnd Bergmann #include "bridge-regs.h"
17edabd38eSSaeed Bishara #include "common.h"
18edabd38eSSaeed Bishara
19278b45b0SAndrew Lunn static int __initdata gpio0_irqs[4] = {
20278b45b0SAndrew Lunn IRQ_DOVE_GPIO_0_7,
21278b45b0SAndrew Lunn IRQ_DOVE_GPIO_8_15,
22278b45b0SAndrew Lunn IRQ_DOVE_GPIO_16_23,
23278b45b0SAndrew Lunn IRQ_DOVE_GPIO_24_31,
24278b45b0SAndrew Lunn };
25278b45b0SAndrew Lunn
26278b45b0SAndrew Lunn static int __initdata gpio1_irqs[4] = {
27278b45b0SAndrew Lunn IRQ_DOVE_HIGH_GPIO,
28278b45b0SAndrew Lunn 0,
29278b45b0SAndrew Lunn 0,
30278b45b0SAndrew Lunn 0,
31278b45b0SAndrew Lunn };
32278b45b0SAndrew Lunn
33278b45b0SAndrew Lunn static int __initdata gpio2_irqs[4] = {
34278b45b0SAndrew Lunn 0,
35278b45b0SAndrew Lunn 0,
36278b45b0SAndrew Lunn 0,
37278b45b0SAndrew Lunn 0,
38278b45b0SAndrew Lunn };
39278b45b0SAndrew Lunn
40deac3d87SThomas Petazzoni static void __iomem *dove_irq_base = IRQ_VIRT_BASE;
41deac3d87SThomas Petazzoni
42deac3d87SThomas Petazzoni static asmlinkage void
dove_legacy_handle_irq(struct pt_regs * regs)43deac3d87SThomas Petazzoni __exception_irq_entry dove_legacy_handle_irq(struct pt_regs *regs)
44deac3d87SThomas Petazzoni {
45deac3d87SThomas Petazzoni u32 stat;
46deac3d87SThomas Petazzoni
47deac3d87SThomas Petazzoni stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_LOW_OFF);
48deac3d87SThomas Petazzoni stat &= readl_relaxed(dove_irq_base + IRQ_MASK_LOW_OFF);
49deac3d87SThomas Petazzoni if (stat) {
505d6bed2aSRussell King unsigned int hwirq = 1 + __fls(stat);
51deac3d87SThomas Petazzoni handle_IRQ(hwirq, regs);
52deac3d87SThomas Petazzoni return;
53deac3d87SThomas Petazzoni }
54deac3d87SThomas Petazzoni stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_HIGH_OFF);
55deac3d87SThomas Petazzoni stat &= readl_relaxed(dove_irq_base + IRQ_MASK_HIGH_OFF);
56deac3d87SThomas Petazzoni if (stat) {
575d6bed2aSRussell King unsigned int hwirq = 33 + __fls(stat);
58deac3d87SThomas Petazzoni handle_IRQ(hwirq, regs);
59deac3d87SThomas Petazzoni return;
60deac3d87SThomas Petazzoni }
61deac3d87SThomas Petazzoni }
62deac3d87SThomas Petazzoni
dove_init_irq(void)63edabd38eSSaeed Bishara void __init dove_init_irq(void)
64edabd38eSSaeed Bishara {
655d6bed2aSRussell King orion_irq_init(1, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF);
665d6bed2aSRussell King orion_irq_init(33, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF);
67edabd38eSSaeed Bishara
68deac3d87SThomas Petazzoni set_handle_irq(dove_legacy_handle_irq);
69deac3d87SThomas Petazzoni
70edabd38eSSaeed Bishara /*
719eac6d0aSLennert Buytenhek * Initialize gpiolib for GPIOs 0-71.
72edabd38eSSaeed Bishara */
73bba14b32SAndy Shevchenko orion_gpio_init(0, 32, DOVE_GPIO_LO_VIRT_BASE, 0,
74278b45b0SAndrew Lunn IRQ_DOVE_GPIO_START, gpio0_irqs);
759eac6d0aSLennert Buytenhek
76bba14b32SAndy Shevchenko orion_gpio_init(32, 32, DOVE_GPIO_HI_VIRT_BASE, 0,
77278b45b0SAndrew Lunn IRQ_DOVE_GPIO_START + 32, gpio1_irqs);
789eac6d0aSLennert Buytenhek
79bba14b32SAndy Shevchenko orion_gpio_init(64, 8, DOVE_GPIO2_VIRT_BASE, 0,
80278b45b0SAndrew Lunn IRQ_DOVE_GPIO_START + 64, gpio2_irqs);
81edabd38eSSaeed Bishara }
82