/*
* arch/arm/mach-ixp4xx/gtwx5715-pci.c
*
* Gemtek GTWX5715 (Linksys WRV54G) board setup
*
* Copyright (C) 2004 George T. Joseph
* Derived from Coyote
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <asm/mach-types.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/arch/gtwx5715.h>
#include <asm/mach/pci.h>
extern void ixp4xx_pci_preinit(void);
extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys);
/*
* The exact GPIO pins and IRQs are defined in arch-ixp4xx/gtwx5715.h
* Slot 0 isn't actually populated with a card connector but
* we initialize it anyway in case a future version has the
* slot populated or someone with good soldering skills has
* some free time.
*/
static void gtwx5715_init_gpio(u8 pin, u32 style)
{
gpio_line_config(pin, style | IXP4XX_GPIO_ACTIVE_LOW);
if (style & IXP4XX_GPIO_IN) gpio_line_isr_clear(pin);
}
void __init gtwx5715_pci_preinit(void)
{
gtwx5715_init_gpio(GTWX5715_PCI_SLOT0_INTA_GPIO, IXP4XX_GPIO_IN);
gtwx5715_init_gpio(GTWX5715_PCI_SLOT1_INTA_GPIO, IXP4XX_GPIO_IN);
ixp4xx_pci_preinit();
}
static int __init gtwx5715_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
int rc;
static int gtwx5715_irqmap
[GTWX5715_PCI_SLOT_COUNT]
[GTWX5715_PCI_INT_PIN_COUNT] = {
{GTWX5715_PCI_SLOT0_INTA_IRQ, GTWX5715_PCI_SLOT0_INTB_IRQ},
{GTWX5715_PCI_SLOT1_INTA_IRQ, GTWX5715_PCI_SLOT1_INTB_IRQ},
};
if (slot >= GTWX5715_PCI_SLOT_COUNT ||
pin >= GTWX5715_PCI_INT_PIN_COUNT) rc = -1;
else
rc = gtwx5715_irqmap[slot][pin-1];
printk("%s: Mapped slot %d pin %d to IRQ %d\n", __FUNCTION__,slot, pin, rc);
return(rc);
}
struct hw_pci gtwx5715_pci __initdata = {
.nr_controllers = 1,
.preinit = gtwx5715_pci_preinit,
.swizzle = pci_std_swizzle,
.setup = ixp4xx_setup,
.scan = ixp4xx_scan_bus,
.map_irq = gtwx5715_map_irq,
};
int __init gtwx5715_pci_init(void)
{
if (machine_is_gtwx5715())
{
pci_common_init(>wx5715_pci);
}
return 0;
}
subsys_initcall(gtwx5715_pci_init);
