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/*
* Atheros AP91 reference board PCI initialization
*
* Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/pci.h>
#include <linux/ath9k_platform.h>
#include <linux/delay.h>
#include <asm/mach-ar71xx/ar71xx.h>
#include <asm/mach-ar71xx/pci.h>
#include "dev-ap91-pci.h"
static struct ath9k_platform_data ap91_wmac_data;
static char ap91_wmac_mac[6];
static int ap91_pci_fixup_enabled;
static struct ar71xx_pci_irq ap91_pci_irqs[] __initdata = {
{
.slot = 0,
.pin = 1,
.irq = AR71XX_PCI_IRQ_DEV0,
}
};
static int ap91_pci_plat_dev_init(struct pci_dev *dev)
{
switch(PCI_SLOT(dev->devfn)) {
case 0:
dev->dev.platform_data = &ap91_wmac_data;
break;
}
return 0;
}
static void ap91_pci_fixup(struct pci_dev *dev)
{
void __iomem *mem;
u16 *cal_data;
u16 cmd;
u32 val;
if (!ap91_pci_fixup_enabled)
return;
printk(KERN_INFO "PCI: fixup device %s\n", pci_name(dev));
cal_data = ap91_wmac_data.eeprom_data;
if (*cal_data != 0xa55a) {
printk(KERN_ERR "PCI: no calibration data found for %s\n",
pci_name(dev));
return;
}
mem = ioremap(AR71XX_PCI_MEM_BASE, 0x10000);
if (!mem) {
printk(KERN_ERR "PCI: ioremap error for device %s\n",
pci_name(dev));
return;
}
/* Setup the PCI device to allow access to the internal registers */
pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 0xffff);
pci_read_config_word(dev, PCI_COMMAND, &cmd);
cmd |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
pci_write_config_word(dev, PCI_COMMAND, cmd);
/* set pointer to first reg address */
cal_data += 3;
while (*cal_data != 0xffff) {
u32 reg;
reg = *cal_data++;
val = *cal_data++;
val |= (*cal_data++) << 16;
__raw_writel(val, mem + reg);
udelay(100);
}
pci_read_config_dword(dev, PCI_VENDOR_ID, &val);
dev->vendor = val & 0xffff;
dev->device = (val >> 16) & 0xffff;
pci_read_config_dword(dev, PCI_CLASS_REVISION, &val);
dev->revision = val & 0xff;
dev->class = val >> 8; /* upper 3 bytes */
iounmap(mem);
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATHEROS, PCI_ANY_ID, ap91_pci_fixup);
void __init ap91_pci_init(u8 *cal_data, u8 *mac_addr)
{
if (cal_data)
memcpy(ap91_wmac_data.eeprom_data, cal_data,
sizeof(ap91_wmac_data.eeprom_data));
if (mac_addr) {
memcpy(ap91_wmac_mac, mac_addr, sizeof(ap91_wmac_mac));
ap91_wmac_data.macaddr = ap91_wmac_mac;
}
ar71xx_pci_plat_dev_init = ap91_pci_plat_dev_init;
ar71xx_pci_init(ARRAY_SIZE(ap91_pci_irqs), ap91_pci_irqs);
ap91_pci_fixup_enabled = 1;
}
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