117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/*
|
|
* arch/arm/mach-orion5x/rd88f5182-setup.c
|
|
*
|
|
* Marvell Orion-NAS Reference Design Setup
|
|
*
|
|
* Maintainer: Ronen Shitrit <rshitrit@marvell.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
#include <linux/gpio.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/irq.h>
|
|
#include <asm/mach-types.h>
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/pci.h>
|
|
#include "common.h"
|
|
#include "orion5x.h"
|
|
|
|
/*****************************************************************************
|
|
* RD-88F5182 Info
|
|
****************************************************************************/
|
|
|
|
/*
|
|
* PCI
|
|
*/
|
|
|
|
#define RD88F5182_PCI_SLOT0_OFFS 7
|
|
#define RD88F5182_PCI_SLOT0_IRQ_A_PIN 7
|
|
#define RD88F5182_PCI_SLOT0_IRQ_B_PIN 6
|
|
|
|
/*****************************************************************************
|
|
* PCI
|
|
****************************************************************************/
|
|
|
|
static void __init rd88f5182_pci_preinit(void)
|
|
{
|
|
int pin;
|
|
|
|
/*
|
|
* Configure PCI GPIO IRQ pins
|
|
*/
|
|
pin = RD88F5182_PCI_SLOT0_IRQ_A_PIN;
|
|
if (gpio_request(pin, "PCI IntA") == 0) {
|
|
if (gpio_direction_input(pin) == 0) {
|
|
irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
|
|
} else {
|
|
printk(KERN_ERR "rd88f5182_pci_preinit failed to "
|
|
"set_irq_type pin %d\n", pin);
|
|
gpio_free(pin);
|
|
}
|
|
} else {
|
|
printk(KERN_ERR "rd88f5182_pci_preinit failed to request gpio %d\n", pin);
|
|
}
|
|
|
|
pin = RD88F5182_PCI_SLOT0_IRQ_B_PIN;
|
|
if (gpio_request(pin, "PCI IntB") == 0) {
|
|
if (gpio_direction_input(pin) == 0) {
|
|
irq_set_irq_type(gpio_to_irq(pin), IRQ_TYPE_LEVEL_LOW);
|
|
} else {
|
|
printk(KERN_ERR "rd88f5182_pci_preinit failed to "
|
|
"set_irq_type pin %d\n", pin);
|
|
gpio_free(pin);
|
|
}
|
|
} else {
|
|
printk(KERN_ERR "rd88f5182_pci_preinit failed to gpio_request %d\n", pin);
|
|
}
|
|
}
|
|
|
|
static int __init rd88f5182_pci_map_irq(const struct pci_dev *dev, u8 slot,
|
|
u8 pin)
|
|
{
|
|
int irq;
|
|
|
|
/*
|
|
* Check for devices with hard-wired IRQs.
|
|
*/
|
|
irq = orion5x_pci_map_irq(dev, slot, pin);
|
|
if (irq != -1)
|
|
return irq;
|
|
|
|
/*
|
|
* PCI IRQs are connected via GPIOs
|
|
*/
|
|
switch (slot - RD88F5182_PCI_SLOT0_OFFS) {
|
|
case 0:
|
|
if (pin == 1)
|
|
return gpio_to_irq(RD88F5182_PCI_SLOT0_IRQ_A_PIN);
|
|
else
|
|
return gpio_to_irq(RD88F5182_PCI_SLOT0_IRQ_B_PIN);
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static struct hw_pci rd88f5182_pci __initdata = {
|
|
.nr_controllers = 2,
|
|
.preinit = rd88f5182_pci_preinit,
|
|
.setup = orion5x_pci_sys_setup,
|
|
.scan = orion5x_pci_sys_scan_bus,
|
|
.map_irq = rd88f5182_pci_map_irq,
|
|
};
|
|
|
|
static int __init rd88f5182_pci_init(void)
|
|
{
|
|
if (of_machine_is_compatible("marvell,rd-88f5182-nas"))
|
|
pci_common_init(&rd88f5182_pci);
|
|
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(rd88f5182_pci_init);
|