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/*
* Atheros AP94 reference board PCI initialization
*
* Copyright (C) 2009-2010 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/delay.h>
#include <asm/mach-ath79/ar71xx_regs.h>
#include <asm/mach-ath79/ath79.h>
#include <asm/mach-ath79/pci.h>
struct ath9k_fixup {
u16 *cal_data;
unsigned slot;
};
static int ath9k_num_fixups;
static struct ath9k_fixup ath9k_fixups[2];
static void ath9k_pci_fixup(struct pci_dev *dev)
{
void __iomem *mem;
u16 *cal_data = NULL;
u16 cmd;
u32 bar0;
u32 val;
unsigned i;
for (i = 0; i < ath9k_num_fixups; i++) {
if (ath9k_fixups[i].cal_data == NULL)
continue;
if (ath9k_fixups[i].slot != PCI_SLOT(dev->devfn))
continue;
cal_data = ath9k_fixups[i].cal_data;
break;
}
if (cal_data == NULL)
return;
if (*cal_data != 0xa55a) {
pr_err("pci %s: invalid calibration data\n", pci_name(dev));
return;
}
pr_info("pci %s: fixup device configuration\n", pci_name(dev));
mem = ioremap(AR71XX_PCI_MEM_BASE, 0x10000);
if (!mem) {
pr_err("pci %s: ioremap error\n", pci_name(dev));
return;
}
pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &bar0);
switch (ath79_soc) {
case ATH79_SOC_AR7161:
pci_write_config_dword(dev, PCI_BASE_ADDRESS_0,
AR71XX_PCI_MEM_BASE);
break;
case ATH79_SOC_AR7240:
pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 0xffff);
break;
case ATH79_SOC_AR7241:
case ATH79_SOC_AR7242:
pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 0x1000ffff);
break;
default:
BUG();
}
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 */
pci_read_config_word(dev, PCI_COMMAND, &cmd);
cmd &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
pci_write_config_word(dev, PCI_COMMAND, cmd);
pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, bar0);
iounmap(mem);
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATHEROS, PCI_ANY_ID, ath9k_pci_fixup);
void __init pci_enable_ath9k_fixup(unsigned slot, u16 *cal_data)
{
if (ath9k_num_fixups >= ARRAY_SIZE(ath9k_fixups))
return;
ath9k_fixups[ath9k_num_fixups].slot = slot;
ath9k_fixups[ath9k_num_fixups].cal_data = cal_data;
ath9k_num_fixups++;
}
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