1 /*
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 "common.h"
22 #include "orion5x.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
rd88f5182_pci_preinit(void)40 static 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
rd88f5182_pci_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)74 static 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
100 static 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
rd88f5182_pci_init(void)108 static 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
116 subsys_initcall(rd88f5182_pci_init);
117