blob: 270824b0e50fccc8ce61c49550dcd667878c52cf [file] [log] [blame]
Thomas Petazzoni065194a2014-04-22 23:26:38 +02001/*
2 * arch/arm/mach-orion5x/rd88f5182-setup.c
3 *
4 * Marvell Orion-NAS Reference Design Setup
5 *
6 * Maintainer: Ronen Shitrit <rshitrit@marvell.com>
7 *
8 * This file is licensed under the terms of the GNU General Public
9 * License version 2. This program is licensed "as is" without any
10 * warranty of any kind, whether express or implied.
11 */
12#include <linux/gpio.h>
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/platform_device.h>
16#include <linux/pci.h>
17#include <linux/irq.h>
18#include <asm/mach-types.h>
19#include <asm/mach/arch.h>
20#include <asm/mach/pci.h>
21#include <mach/orion5x.h>
22#include "common.h"
23
24/*****************************************************************************
25 * RD-88F5182 Info
26 ****************************************************************************/
27
28/*
29 * PCI
30 */
31
32#define RD88F5182_PCI_SLOT0_OFFS 7
33#define RD88F5182_PCI_SLOT0_IRQ_A_PIN 7
34#define RD88F5182_PCI_SLOT0_IRQ_B_PIN 6
35
36/*****************************************************************************
37 * PCI
38 ****************************************************************************/
39
40static void __init rd88f5182_pci_preinit(void)
41{
42 int pin;
43
44 /*
45 * Configure PCI GPIO IRQ pins
46 */
47 pin = RD88F5182_PCI_SLOT0_IRQ_A_PIN;
48 if (gpio_request(pin, "PCI IntA") == 0) {
49 if (gpio_direction_input(pin) == 0) {
50 irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
51 } else {
52 printk(KERN_ERR "rd88f5182_pci_preinit failed to "
53 "set_irq_type pin %d\n", pin);
54 gpio_free(pin);
55 }
56 } else {
57 printk(KERN_ERR "rd88f5182_pci_preinit failed to request gpio %d\n", pin);
58 }
59
60 pin = RD88F5182_PCI_SLOT0_IRQ_B_PIN;
61 if (gpio_request(pin, "PCI IntB") == 0) {
62 if (gpio_direction_input(pin) == 0) {
63 irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
64 } else {
65 printk(KERN_ERR "rd88f5182_pci_preinit failed to "
66 "set_irq_type pin %d\n", pin);
67 gpio_free(pin);
68 }
69 } else {
70 printk(KERN_ERR "rd88f5182_pci_preinit failed to gpio_request %d\n", pin);
71 }
72}
73
74static int __init rd88f5182_pci_map_irq(const struct pci_dev *dev, u8 slot,
75 u8 pin)
76{
77 int irq;
78
79 /*
80 * Check for devices with hard-wired IRQs.
81 */
82 irq = orion5x_pci_map_irq(dev, slot, pin);
83 if (irq != -1)
84 return irq;
85
86 /*
87 * PCI IRQs are connected via GPIOs
88 */
89 switch (slot - RD88F5182_PCI_SLOT0_OFFS) {
90 case 0:
91 if (pin == 1)
92 return gpio_to_irq(RD88F5182_PCI_SLOT0_IRQ_A_PIN);
93 else
94 return gpio_to_irq(RD88F5182_PCI_SLOT0_IRQ_B_PIN);
95 default:
96 return -1;
97 }
98}
99
100static struct hw_pci rd88f5182_pci __initdata = {
101 .nr_controllers = 2,
102 .preinit = rd88f5182_pci_preinit,
103 .setup = orion5x_pci_sys_setup,
104 .scan = orion5x_pci_sys_scan_bus,
105 .map_irq = rd88f5182_pci_map_irq,
106};
107
108static int __init rd88f5182_pci_init(void)
109{
110 if (of_machine_is_compatible("marvell,rd-88f5182-nas"))
111 pci_common_init(&rd88f5182_pci);
112
113 return 0;
114}
115
116subsys_initcall(rd88f5182_pci_init);