| Thomas Petazzoni | 065194a | 2014-04-22 23:26:38 +0200 | [diff] [blame] | 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 <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 | |
| 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 | |
| 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 | |
| 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); |