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 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); 117