arch/arm/mach-orion5x/board-rd88f5182.c

   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);