10fdebc5eSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2065194a0SThomas Petazzoni /*
3065194a0SThomas Petazzoni * arch/arm/mach-orion5x/rd88f5182-setup.c
4065194a0SThomas Petazzoni *
5065194a0SThomas Petazzoni * Marvell Orion-NAS Reference Design Setup
6065194a0SThomas Petazzoni *
7065194a0SThomas Petazzoni * Maintainer: Ronen Shitrit <rshitrit@marvell.com>
8065194a0SThomas Petazzoni */
9065194a0SThomas Petazzoni #include <linux/gpio.h>
10065194a0SThomas Petazzoni #include <linux/kernel.h>
11065194a0SThomas Petazzoni #include <linux/init.h>
12*a8e59744SArnd Bergmann #include <linux/of.h>
13065194a0SThomas Petazzoni #include <linux/platform_device.h>
14065194a0SThomas Petazzoni #include <linux/pci.h>
15065194a0SThomas Petazzoni #include <linux/irq.h>
16065194a0SThomas Petazzoni #include <asm/mach-types.h>
17065194a0SThomas Petazzoni #include <asm/mach/arch.h>
18065194a0SThomas Petazzoni #include <asm/mach/pci.h>
19065194a0SThomas Petazzoni #include "common.h"
20c22c2c60SArnd Bergmann #include "orion5x.h"
21065194a0SThomas Petazzoni
22065194a0SThomas Petazzoni /*****************************************************************************
23065194a0SThomas Petazzoni * RD-88F5182 Info
24065194a0SThomas Petazzoni ****************************************************************************/
25065194a0SThomas Petazzoni
26065194a0SThomas Petazzoni /*
27065194a0SThomas Petazzoni * PCI
28065194a0SThomas Petazzoni */
29065194a0SThomas Petazzoni
30065194a0SThomas Petazzoni #define RD88F5182_PCI_SLOT0_OFFS 7
31065194a0SThomas Petazzoni #define RD88F5182_PCI_SLOT0_IRQ_A_PIN 7
32065194a0SThomas Petazzoni #define RD88F5182_PCI_SLOT0_IRQ_B_PIN 6
33065194a0SThomas Petazzoni
34065194a0SThomas Petazzoni /*****************************************************************************
35065194a0SThomas Petazzoni * PCI
36065194a0SThomas Petazzoni ****************************************************************************/
37065194a0SThomas Petazzoni
rd88f5182_pci_preinit(void)38065194a0SThomas Petazzoni static void __init rd88f5182_pci_preinit(void)
39065194a0SThomas Petazzoni {
40065194a0SThomas Petazzoni int pin;
41065194a0SThomas Petazzoni
42065194a0SThomas Petazzoni /*
43065194a0SThomas Petazzoni * Configure PCI GPIO IRQ pins
44065194a0SThomas Petazzoni */
45065194a0SThomas Petazzoni pin = RD88F5182_PCI_SLOT0_IRQ_A_PIN;
46065194a0SThomas Petazzoni if (gpio_request(pin, "PCI IntA") == 0) {
47065194a0SThomas Petazzoni if (gpio_direction_input(pin) == 0) {
48065194a0SThomas Petazzoni irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
49065194a0SThomas Petazzoni } else {
50065194a0SThomas Petazzoni printk(KERN_ERR "rd88f5182_pci_preinit failed to "
51065194a0SThomas Petazzoni "set_irq_type pin %d\n", pin);
52065194a0SThomas Petazzoni gpio_free(pin);
53065194a0SThomas Petazzoni }
54065194a0SThomas Petazzoni } else {
55065194a0SThomas Petazzoni printk(KERN_ERR "rd88f5182_pci_preinit failed to request gpio %d\n", pin);
56065194a0SThomas Petazzoni }
57065194a0SThomas Petazzoni
58065194a0SThomas Petazzoni pin = RD88F5182_PCI_SLOT0_IRQ_B_PIN;
59065194a0SThomas Petazzoni if (gpio_request(pin, "PCI IntB") == 0) {
60065194a0SThomas Petazzoni if (gpio_direction_input(pin) == 0) {
61065194a0SThomas Petazzoni irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
62065194a0SThomas Petazzoni } else {
63065194a0SThomas Petazzoni printk(KERN_ERR "rd88f5182_pci_preinit failed to "
64065194a0SThomas Petazzoni "set_irq_type pin %d\n", pin);
65065194a0SThomas Petazzoni gpio_free(pin);
66065194a0SThomas Petazzoni }
67065194a0SThomas Petazzoni } else {
68065194a0SThomas Petazzoni printk(KERN_ERR "rd88f5182_pci_preinit failed to gpio_request %d\n", pin);
69065194a0SThomas Petazzoni }
70065194a0SThomas Petazzoni }
71065194a0SThomas Petazzoni
rd88f5182_pci_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)72065194a0SThomas Petazzoni static int __init rd88f5182_pci_map_irq(const struct pci_dev *dev, u8 slot,
73065194a0SThomas Petazzoni u8 pin)
74065194a0SThomas Petazzoni {
75065194a0SThomas Petazzoni int irq;
76065194a0SThomas Petazzoni
77065194a0SThomas Petazzoni /*
78065194a0SThomas Petazzoni * Check for devices with hard-wired IRQs.
79065194a0SThomas Petazzoni */
80065194a0SThomas Petazzoni irq = orion5x_pci_map_irq(dev, slot, pin);
81065194a0SThomas Petazzoni if (irq != -1)
82065194a0SThomas Petazzoni return irq;
83065194a0SThomas Petazzoni
84065194a0SThomas Petazzoni /*
85065194a0SThomas Petazzoni * PCI IRQs are connected via GPIOs
86065194a0SThomas Petazzoni */
87065194a0SThomas Petazzoni switch (slot - RD88F5182_PCI_SLOT0_OFFS) {
88065194a0SThomas Petazzoni case 0:
89065194a0SThomas Petazzoni if (pin == 1)
90065194a0SThomas Petazzoni return gpio_to_irq(RD88F5182_PCI_SLOT0_IRQ_A_PIN);
91065194a0SThomas Petazzoni else
92065194a0SThomas Petazzoni return gpio_to_irq(RD88F5182_PCI_SLOT0_IRQ_B_PIN);
93065194a0SThomas Petazzoni default:
94065194a0SThomas Petazzoni return -1;
95065194a0SThomas Petazzoni }
96065194a0SThomas Petazzoni }
97065194a0SThomas Petazzoni
98065194a0SThomas Petazzoni static struct hw_pci rd88f5182_pci __initdata = {
99065194a0SThomas Petazzoni .nr_controllers = 2,
100065194a0SThomas Petazzoni .preinit = rd88f5182_pci_preinit,
101065194a0SThomas Petazzoni .setup = orion5x_pci_sys_setup,
102065194a0SThomas Petazzoni .scan = orion5x_pci_sys_scan_bus,
103065194a0SThomas Petazzoni .map_irq = rd88f5182_pci_map_irq,
104065194a0SThomas Petazzoni };
105065194a0SThomas Petazzoni
rd88f5182_pci_init(void)106065194a0SThomas Petazzoni static int __init rd88f5182_pci_init(void)
107065194a0SThomas Petazzoni {
108065194a0SThomas Petazzoni if (of_machine_is_compatible("marvell,rd-88f5182-nas"))
109065194a0SThomas Petazzoni pci_common_init(&rd88f5182_pci);
110065194a0SThomas Petazzoni
111065194a0SThomas Petazzoni return 0;
112065194a0SThomas Petazzoni }
113065194a0SThomas Petazzoni
114065194a0SThomas Petazzoni subsys_initcall(rd88f5182_pci_init);
115