atheros: split out the pci support patch

SVN-Revision: 14969
15 years ago · 675f7bfdd8
parent df68a2199b
commit 675f7bfdd8
2 changed files with 301 additions and 438 deletions
--- a/target/linux/atheros/patches-2.6.28/100-board.patch
+++ b/target/linux/atheros/patches-2.6.28/100-board.patch
@ -46,7 +46,7 @@
 core-$(CONFIG_MIPS_COBALT)	+= arch/mips/cobalt/
 --- /dev/null
 +++ b/arch/mips/ar231x/Kconfig
-@@ -0,0 +1,27 @@
+@@ -0,0 +1,17 @@
 +config ATHEROS_AR5312
 +	bool "Atheros 5312/2312+ support"
 +	depends on ATHEROS
@ -64,19 +64,9 @@
 +	select SYS_SUPPORTS_BIG_ENDIAN
 +	select GENERIC_GPIO
 +	default y
-+
-+config ATHEROS_AR2315_PCI
-+	bool "PCI support"
-+	depends on ATHEROS_AR2315
-+	select HW_HAS_PCI
-+	select PCI
-+	select USB_ARCH_HAS_HCD
-+	select USB_ARCH_HAS_OHCI
-+	select USB_ARCH_HAS_EHCI
-+	default y
 --- /dev/null
 +++ b/arch/mips/ar231x/Makefile
-@@ -0,0 +1,14 @@
+@@ -0,0 +1,13 @@
 +#
 +# This file is subject to the terms and conditions of the GNU General Public
 +# License.  See the file "COPYING" in the main directory of this archive
@ -90,7 +80,6 @@
 +obj-y += board.o prom.o devices.o
 +obj-$(CONFIG_ATHEROS_AR5312) += ar5312.o
 +obj-$(CONFIG_ATHEROS_AR2315) += ar2315.o
-+obj-$(CONFIG_ATHEROS_AR2315_PCI) += pci.o
 --- /dev/null
 +++ b/arch/mips/ar231x/board.c
@@ -0,0 +1,247 @@
@ -382,171 +371,6 @@
 +{
 +}
 --- /dev/null
-+++ b/arch/mips/ar231x/reset.c
-@@ -0,0 +1,162 @@
-+#include <linux/module.h>
-+#include <linux/timer.h>
-+#include <linux/interrupt.h>
-+#include <linux/kobject.h>
-+#include <linux/workqueue.h>
-+#include <linux/skbuff.h>
-+#include <linux/netlink.h>
-+#include <net/sock.h>
-+#include <asm/uaccess.h>
-+#include <ar231x.h>
-+
-+#define AR531X_RESET_GPIO_IRQ	(AR531X_GPIO_IRQ(bcfg->resetConfigGpio))
-+
-+struct event_t {
-+	struct work_struct wq;
-+	int set;
-+	unsigned long jiffies;
-+};
-+
-+static struct ar231x_boarddata *bcfg;
-+static struct timer_list rst_button_timer;
-+
-+extern struct sock *uevent_sock;
-+extern u64 uevent_next_seqnum(void);
-+static unsigned long seen;
-+
-+static inline void add_msg(struct sk_buff *skb, char *msg)
-+{
-+	char *scratch;
-+	scratch = skb_put(skb, strlen(msg) + 1);
-+	sprintf(scratch, msg);
-+}
-+
-+static void hotplug_button(struct work_struct *wq)
-+{
-+	struct sk_buff *skb;
-+	struct event_t *event;
-+	size_t len;
-+	char *scratch, *s;
-+	char buf[128];
-+
-+	event = container_of(wq, struct event_t, wq);
-+	if (!uevent_sock)
-+		goto done;
-+
-+	/* allocate message with the maximum possible size */
-+	s = event->set ? "pressed" : "released";
-+	len = strlen(s) + 2;
-+	skb = alloc_skb(len + 2048, GFP_KERNEL);
-+	if (!skb)
-+		goto done;
-+
-+	/* add header */
-+	scratch = skb_put(skb, len);
-+	sprintf(scratch, "%s@",s);
-+
-+	/* copy keys to our continuous event payload buffer */
-+	add_msg(skb, "HOME=/");
-+	add_msg(skb, "PATH=/sbin:/bin:/usr/sbin:/usr/bin");
-+	add_msg(skb, "SUBSYSTEM=button");
-+	add_msg(skb, "BUTTON=reset");
-+	add_msg(skb, (event->set ? "ACTION=pressed" : "ACTION=released"));
-+	sprintf(buf, "SEEN=%ld", (event->jiffies - seen)/HZ);
-+	add_msg(skb, buf);
-+	snprintf(buf, 128, "SEQNUM=%llu", uevent_next_seqnum());
-+	add_msg(skb, buf);
-+
-+	NETLINK_CB(skb).dst_group = 1;
-+	netlink_broadcast(uevent_sock, skb, 0, 1, GFP_KERNEL);
-+
-+done:
-+	kfree(event);
-+}
-+
-+static int no_release_workaround = 1;
-+
-+static void
-+reset_button_poll(unsigned long unused)
-+{
-+	struct event_t *event;
-+	int gpio = ~0;
-+
-+	if(!no_release_workaround)
-+		return;
-+
-+	DO_AR2315(gpio = sysRegRead(AR2315_GPIO_DI);)
-+    gpio &= 1 << (AR531X_RESET_GPIO_IRQ - AR531X_GPIO_IRQ_BASE);
-+	if(gpio)
-+	{
-+		rst_button_timer.expires = jiffies + (HZ / 4);
-+		add_timer(&rst_button_timer);
-+	} else {
-+		event = (struct event_t *) kzalloc(sizeof(struct event_t), GFP_ATOMIC);
-+		if (!event)
-+		{
-+			printk("Could not alloc hotplug event\n");
-+			return;
-+		}
-+		event->set = 0;
-+		event->jiffies = jiffies;
-+		INIT_WORK(&event->wq, (void *)(void *)hotplug_button);
-+		schedule_work(&event->wq);
-+	}
-+}
-+
-+static irqreturn_t button_handler(int irq, void *dev_id)
-+{
-+	static int pressed = 0;
-+	struct event_t *event;
-+	u32 gpio = ~0;
-+
-+	event = (struct event_t *) kzalloc(sizeof(struct event_t), GFP_ATOMIC);
-+	if (!event)
-+		return IRQ_NONE;
-+
-+	pressed = !pressed;
-+
-+	DO_AR2315(gpio = sysRegRead(AR2315_GPIO_DI);)
-+	gpio &= 1 << (irq - AR531X_GPIO_IRQ_BASE);
-+
-+	event->set = gpio;
-+	if(!event->set)
-+		no_release_workaround = 0;
-+
-+	event->jiffies = jiffies;
-+
-+	INIT_WORK(&event->wq, (void *)(void *)hotplug_button);
-+	schedule_work(&event->wq);
-+
-+	seen = jiffies;
-+	if(event->set && no_release_workaround)
-+		mod_timer(&rst_button_timer, jiffies + (HZ / 4));
-+
-+	return IRQ_HANDLED;
-+}
-+
-+void ar231x_disable_reset_button(void)
-+{
-+	disable_irq(AR531X_RESET_GPIO_IRQ);
-+}
-+
-+EXPORT_SYMBOL(ar231x_disable_reset_button);
-+
-+int __init ar231x_init_reset(void)
-+{
-+	bcfg = (struct ar231x_boarddata *) board_config;
-+
-+	seen = jiffies;
-+
-+	init_timer(&rst_button_timer);
-+	rst_button_timer.function = reset_button_poll;
-+	rst_button_timer.expires = jiffies + HZ / 50;
-+	add_timer(&rst_button_timer);
-+
-+	request_irq(AR531X_RESET_GPIO_IRQ, &button_handler, IRQF_SAMPLE_RANDOM, "ar231x_reset", NULL);
-+
-+	return 0;
-+}
-+
-+
-+
-+module_init(ar231x_init_reset);
--- /dev/null
 +++ b/arch/mips/include/asm/mach-ar231x/ar231x_platform.h
@@ -0,0 +1,83 @@
 +#ifndef __AR531X_PLATFORM_H
@ -2271,242 +2095,8 @@
 +}
 +
 --- /dev/null
-+++ b/arch/mips/ar231x/pci.c
-@@ -0,0 +1,231 @@
-+/*
-+ * 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/types.h>
-+#include <linux/pci.h>
-+#include <linux/kernel.h>
-+#include <linux/init.h>
-+#include <linux/mm.h>
-+#include <linux/spinlock.h>
-+#include <linux/delay.h>
-+#include <linux/irq.h>
-+#include <asm/bootinfo.h>
-+#include <asm/paccess.h>
-+#include <asm/irq_cpu.h>
-+#include <asm/io.h>
-+#include <ar231x_platform.h>
-+#include <ar231x.h>
-+#include <ar2315_regs.h>
-+
-+#define AR531X_MEM_BASE    0x80800000UL
-+#define AR531X_MEM_SIZE    0x00ffffffUL
-+#define AR531X_IO_SIZE     0x00007fffUL
-+
-+#define IS_2315() (current_cpu_data.cputype == CPU_4KEC)
-+
-+static unsigned long configspace;
-+
-+static int config_access(int devfn, int where, int size, u32 *ptr, bool write)
-+{
-+	unsigned long flags;
-+	int func = PCI_FUNC(devfn);
-+	int dev = PCI_SLOT(devfn);
-+	u32 value = 0;
-+	int err = 0;
-+	u32 addr;
-+
-+	if (((dev != 0) && (dev != 3)) || (func > 2))
-+		return PCIBIOS_DEVICE_NOT_FOUND;
-+
-+	/* Select Configuration access */
-+	local_irq_save(flags);
-+	ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, 0, AR2315_PCIMISC_CFG_SEL);
-+	mb();
-+
-+	addr = (u32) configspace + (1 << (13 + dev)) + (func << 8) + where;
-+	if (size == 1)
-+		addr ^= 0x3;
-+	else if (size == 2)
-+		addr ^= 0x2;
-+
-+	if (write) {
-+		value = *ptr;
-+		if (size == 1)
-+			err = put_dbe(value, (u8 *) addr);
-+		else if (size == 2)
-+			err = put_dbe(value, (u16 *) addr);
-+		else if (size == 4)
-+			err = put_dbe(value, (u32 *) addr);
-+	} else {
-+		if (size == 1)
-+			err = get_dbe(value, (u8 *) addr);
-+		else if (size == 2)
-+			err = get_dbe(value, (u16 *) addr);
-+		else if (size == 4)
-+			err = get_dbe(value, (u32 *) addr);
-+		if (err)
-+			*ptr = 0xffffffff;
-+		else
-+			*ptr = value;
-+	}
-+
-+	/* Select Memory access */
-+	ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, AR2315_PCIMISC_CFG_SEL, 0);
-+	local_irq_restore(flags);
-+
-+	return (err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL);
-+}
-+
-+static int ar231x_pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 * value)
-+{
-+	return config_access(devfn, where, size, value, 0);
-+}
-+
-+static int ar231x_pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
-+{
-+	return config_access(devfn, where, size, &value, 1);
-+}
-+
-+struct pci_ops ar231x_pci_ops = {
-+	.read	= ar231x_pci_read,
-+	.write	= ar231x_pci_write,
-+};
-+
-+static struct resource ar231x_mem_resource = {
-+	.name	= "AR531x PCI MEM",
-+	.start	= AR531X_MEM_BASE,
-+	.end	= AR531X_MEM_BASE + AR531X_MEM_SIZE - AR531X_IO_SIZE - 1 + 0x4000000,
-+	.flags	= IORESOURCE_MEM,
-+};
-+
-+static struct resource ar231x_io_resource = {
-+	.name	= "AR531x PCI I/O",
-+	.start	= AR531X_MEM_BASE + AR531X_MEM_SIZE - AR531X_IO_SIZE,
-+	.end	= AR531X_MEM_BASE + AR531X_MEM_SIZE - 1,
-+	.flags	= IORESOURCE_IO,
-+};
-+
-+struct pci_controller ar231x_pci_controller = {
-+	.pci_ops		= &ar231x_pci_ops,
-+	.mem_resource	= &ar231x_mem_resource,
-+	.io_resource	= &ar231x_io_resource,
-+	.mem_offset     = 0x00000000UL,
-+	.io_offset      = 0x00000000UL,
-+};
-+
-+int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
-+{
-+	return AR2315_IRQ_LCBUS_PCI;
-+}
-+
-+int pcibios_plat_dev_init(struct pci_dev *dev)
-+{
-+	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 5);
-+	pci_write_config_word(dev, 0x40, 0);
-+
-+	/* Clear any pending Abort or external Interrupts
-+	 * and enable interrupt processing */
-+	ar231x_mask_reg(AR2315_PCI_INTEN_REG, AR2315_PCI_INT_ENABLE, 0);
-+	ar231x_write_reg(AR2315_PCI_INT_STATUS, (AR2315_PCI_ABORT_INT | AR2315_PCI_EXT_INT));
-+	ar231x_write_reg(AR2315_PCI_INT_MASK, (AR2315_PCI_ABORT_INT | AR2315_PCI_EXT_INT));
-+	ar231x_mask_reg(AR2315_PCI_INTEN_REG, 0, AR2315_PCI_INT_ENABLE);
-+
-+	return 0;
-+}
-+
-+static void
-+ar2315_pci_fixup(struct pci_dev *dev)
-+{
-+	unsigned int devfn = dev->devfn;
-+
-+	if (dev->bus->number != 0)
-+		return;
-+
-+	/* Only fix up the PCI host settings */
-+	if ((PCI_SLOT(devfn) != 3) || (PCI_FUNC(devfn) != 0))
-+		return;
-+
-+	/* Fix up MBARs */
-+	pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, HOST_PCI_MBAR0);
-+	pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, HOST_PCI_MBAR1);
-+	pci_write_config_dword(dev, PCI_BASE_ADDRESS_2, HOST_PCI_MBAR2);
-+	pci_write_config_dword(dev, PCI_COMMAND,
-+		PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_SPECIAL |
-+		PCI_COMMAND_INVALIDATE | PCI_COMMAND_PARITY | PCI_COMMAND_SERR |
-+		PCI_COMMAND_FAST_BACK);
-+}
-+DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, ar2315_pci_fixup);
-+
-+static int __init
-+ar2315_pci_init(void)
-+{
-+	u32 reg;
-+
-+	if (!IS_2315())
-+		return -ENODEV;
-+
-+	configspace = (unsigned long) ioremap_nocache(0x80000000, 1*1024*1024); /* Remap PCI config space */
-+	ar231x_pci_controller.io_map_base =
-+		(unsigned long) ioremap_nocache(AR531X_MEM_BASE + AR531X_MEM_SIZE, AR531X_IO_SIZE);
-+	set_io_port_base(ar231x_pci_controller.io_map_base); /* PCI I/O space */
-+
-+	reg = ar231x_mask_reg(AR2315_RESET, 0, AR2315_RESET_PCIDMA);
-+	msleep(10);
-+
-+	reg &= ~AR2315_RESET_PCIDMA;
-+	ar231x_write_reg(AR2315_RESET, reg);
-+	msleep(10);
-+
-+	ar231x_mask_reg(AR2315_ENDIAN_CTL, 0,
-+		AR2315_CONFIG_PCIAHB | AR2315_CONFIG_PCIAHB_BRIDGE);
-+
-+	ar231x_write_reg(AR2315_PCICLK, AR2315_PCICLK_PLLC_CLKM |
-+		(AR2315_PCICLK_IN_FREQ_DIV_6 << AR2315_PCICLK_DIV_S));
-+	ar231x_mask_reg(AR2315_AHB_ARB_CTL, 0, AR2315_ARB_PCI);
-+	ar231x_mask_reg(AR2315_IF_CTL, AR2315_IF_PCI_CLK_MASK | AR2315_IF_MASK,
-+		AR2315_IF_PCI | AR2315_IF_PCI_HOST | AR2315_IF_PCI_INTR |
-+		 (AR2315_IF_PCI_CLK_OUTPUT_CLK << AR2315_IF_PCI_CLK_SHIFT));
-+
-+	/* Reset the PCI bus by setting bits 5-4 in PCI_MCFG */
-+	ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, AR2315_PCIMISC_RST_MODE,
-+		AR2315_PCIRST_LOW);
-+	msleep(100);
-+
-+	/* Bring the PCI out of reset */
-+	ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, AR2315_PCIMISC_RST_MODE,
-+		AR2315_PCIRST_HIGH | AR2315_PCICACHE_DIS | 0x8);
-+
-+	ar231x_write_reg(AR2315_PCI_UNCACHE_CFG,
-+			0x1E | /* 1GB uncached */
-+			(1 << 5) | /* Enable uncached */
-+			(0x2 << 30) /* Base: 0x80000000 */
-+	);
-+	ar231x_read_reg(AR2315_PCI_UNCACHE_CFG);
-+
-+	msleep(500);
-+
-+	/* dirty hack - anyone with a datasheet that knows the memory map ? */
-+	ioport_resource.start = 0x10000000;
-+	ioport_resource.end = 0xffffffff;
-+	iomem_resource.start = 0x10000000;
-+	iomem_resource.end = 0xffffffff;
-+
-+	register_pci_controller(&ar231x_pci_controller);
-+
-+	return 0;
-+}
-+
-+arch_initcall(ar2315_pci_init);
--- /dev/null
 +++ b/arch/mips/ar231x/ar2315.c
-@@ -0,0 +1,688 @@
+@@ -0,0 +1,663 @@
 +/*
 + * This file is subject to the terms and conditions of the GNU General Public
 + * License.  See the file "COPYING" in the main directory of this archive
@ -2570,27 +2160,6 @@
 +	do_IRQ(AR531X_GPIO_IRQ_BASE + fls(pend) - 1);
 +}
 +
-+#ifdef CONFIG_ATHEROS_AR2315_PCI
-+static inline void pci_abort_irq(void)
-+{
-+	ar231x_write_reg(AR2315_PCI_INT_STATUS, AR2315_PCI_ABORT_INT);
-+}
-+
-+static inline void pci_ack_irq(void)
-+{
-+	ar231x_write_reg(AR2315_PCI_INT_STATUS, AR2315_PCI_EXT_INT);
-+}
-+
-+void ar2315_pci_irq(int irq)
-+{
-+	if (ar231x_read_reg(AR2315_PCI_INT_STATUS) == AR2315_PCI_ABORT_INT)
-+		pci_abort_irq();
-+	else {
-+		do_IRQ(irq);
-+		pci_ack_irq();
-+	}
-+}
-+#endif /* CONFIG_ATHEROS_AR2315_PCI */
 +
 +/*
 + * Called when an interrupt is received, this function
@ -2609,10 +2178,6 @@
 +		do_IRQ(AR2315_IRQ_WLAN0_INTRS);
 +	else if (pending & CAUSEF_IP4)
 +		do_IRQ(AR2315_IRQ_ENET0_INTRS);
-+#ifdef CONFIG_ATHEROS_AR2315_PCI
-+	else if (pending & CAUSEF_IP5)
-+		ar2315_pci_irq(AR2315_IRQ_LCBUS_PCI);
-+#endif
 +	else if (pending & CAUSEF_IP2) {
 +		unsigned int misc_intr = ar231x_read_reg(AR2315_ISR) & ar231x_read_reg(AR2315_IMR);
 +
--- a/target/linux/atheros/patches-2.6.28/105-ar2315_pci.patch
+++ b/target/linux/atheros/patches-2.6.28/105-ar2315_pci.patch
@ -0,0 +1,298 @@
+--- a/arch/mips/ar231x/Makefile
+++ b/arch/mips/ar231x/Makefile
+@@ -11,3 +11,4 @@
+ obj-y += board.o prom.o devices.o
+ obj-$(CONFIG_ATHEROS_AR5312) += ar5312.o
+ obj-$(CONFIG_ATHEROS_AR2315) += ar2315.o
+obj-$(CONFIG_ATHEROS_AR2315_PCI) += pci.o
+--- /dev/null
+++ b/arch/mips/ar231x/pci.c
+@@ -0,0 +1,231 @@
+/*
+ * 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/types.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <asm/bootinfo.h>
+#include <asm/paccess.h>
+#include <asm/irq_cpu.h>
+#include <asm/io.h>
+#include <ar231x_platform.h>
+#include <ar231x.h>
+#include <ar2315_regs.h>
+
+#define AR531X_MEM_BASE    0x80800000UL
+#define AR531X_MEM_SIZE    0x00ffffffUL
+#define AR531X_IO_SIZE     0x00007fffUL
+
+#define IS_2315() (current_cpu_data.cputype == CPU_4KEC)
+
+static unsigned long configspace;
+
+static int config_access(int devfn, int where, int size, u32 *ptr, bool write)
+{
+	unsigned long flags;
+	int func = PCI_FUNC(devfn);
+	int dev = PCI_SLOT(devfn);
+	u32 value = 0;
+	int err = 0;
+	u32 addr;
+
+	if (((dev != 0) && (dev != 3)) || (func > 2))
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	/* Select Configuration access */
+	local_irq_save(flags);
+	ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, 0, AR2315_PCIMISC_CFG_SEL);
+	mb();
+
+	addr = (u32) configspace + (1 << (13 + dev)) + (func << 8) + where;
+	if (size == 1)
+		addr ^= 0x3;
+	else if (size == 2)
+		addr ^= 0x2;
+
+	if (write) {
+		value = *ptr;
+		if (size == 1)
+			err = put_dbe(value, (u8 *) addr);
+		else if (size == 2)
+			err = put_dbe(value, (u16 *) addr);
+		else if (size == 4)
+			err = put_dbe(value, (u32 *) addr);
+	} else {
+		if (size == 1)
+			err = get_dbe(value, (u8 *) addr);
+		else if (size == 2)
+			err = get_dbe(value, (u16 *) addr);
+		else if (size == 4)
+			err = get_dbe(value, (u32 *) addr);
+		if (err)
+			*ptr = 0xffffffff;
+		else
+			*ptr = value;
+	}
+
+	/* Select Memory access */
+	ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, AR2315_PCIMISC_CFG_SEL, 0);
+	local_irq_restore(flags);
+
+	return (err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL);
+}
+
+static int ar231x_pci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 * value)
+{
+	return config_access(devfn, where, size, value, 0);
+}
+
+static int ar231x_pci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 value)
+{
+	return config_access(devfn, where, size, &value, 1);
+}
+
+struct pci_ops ar231x_pci_ops = {
+	.read	= ar231x_pci_read,
+	.write	= ar231x_pci_write,
+};
+
+static struct resource ar231x_mem_resource = {
+	.name	= "AR531x PCI MEM",
+	.start	= AR531X_MEM_BASE,
+	.end	= AR531X_MEM_BASE + AR531X_MEM_SIZE - AR531X_IO_SIZE - 1 + 0x4000000,
+	.flags	= IORESOURCE_MEM,
+};
+
+static struct resource ar231x_io_resource = {
+	.name	= "AR531x PCI I/O",
+	.start	= AR531X_MEM_BASE + AR531X_MEM_SIZE - AR531X_IO_SIZE,
+	.end	= AR531X_MEM_BASE + AR531X_MEM_SIZE - 1,
+	.flags	= IORESOURCE_IO,
+};
+
+struct pci_controller ar231x_pci_controller = {
+	.pci_ops		= &ar231x_pci_ops,
+	.mem_resource	= &ar231x_mem_resource,
+	.io_resource	= &ar231x_io_resource,
+	.mem_offset     = 0x00000000UL,
+	.io_offset      = 0x00000000UL,
+};
+
+int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+	return AR2315_IRQ_LCBUS_PCI;
+}
+
+int pcibios_plat_dev_init(struct pci_dev *dev)
+{
+	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 5);
+	pci_write_config_word(dev, 0x40, 0);
+
+	/* Clear any pending Abort or external Interrupts
+	 * and enable interrupt processing */
+	ar231x_mask_reg(AR2315_PCI_INTEN_REG, AR2315_PCI_INT_ENABLE, 0);
+	ar231x_write_reg(AR2315_PCI_INT_STATUS, (AR2315_PCI_ABORT_INT | AR2315_PCI_EXT_INT));
+	ar231x_write_reg(AR2315_PCI_INT_MASK, (AR2315_PCI_ABORT_INT | AR2315_PCI_EXT_INT));
+	ar231x_mask_reg(AR2315_PCI_INTEN_REG, 0, AR2315_PCI_INT_ENABLE);
+
+	return 0;
+}
+
+static void
+ar2315_pci_fixup(struct pci_dev *dev)
+{
+	unsigned int devfn = dev->devfn;
+
+	if (dev->bus->number != 0)
+		return;
+
+	/* Only fix up the PCI host settings */
+	if ((PCI_SLOT(devfn) != 3) || (PCI_FUNC(devfn) != 0))
+		return;
+
+	/* Fix up MBARs */
+	pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, HOST_PCI_MBAR0);
+	pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, HOST_PCI_MBAR1);
+	pci_write_config_dword(dev, PCI_BASE_ADDRESS_2, HOST_PCI_MBAR2);
+	pci_write_config_dword(dev, PCI_COMMAND,
+		PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_SPECIAL |
+		PCI_COMMAND_INVALIDATE | PCI_COMMAND_PARITY | PCI_COMMAND_SERR |
+		PCI_COMMAND_FAST_BACK);
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, ar2315_pci_fixup);
+
+static int __init
+ar2315_pci_init(void)
+{
+	u32 reg;
+
+	if (!IS_2315())
+		return -ENODEV;
+
+	configspace = (unsigned long) ioremap_nocache(0x80000000, 1*1024*1024); /* Remap PCI config space */
+	ar231x_pci_controller.io_map_base =
+		(unsigned long) ioremap_nocache(AR531X_MEM_BASE + AR531X_MEM_SIZE, AR531X_IO_SIZE);
+	set_io_port_base(ar231x_pci_controller.io_map_base); /* PCI I/O space */
+
+	reg = ar231x_mask_reg(AR2315_RESET, 0, AR2315_RESET_PCIDMA);
+	msleep(10);
+
+	reg &= ~AR2315_RESET_PCIDMA;
+	ar231x_write_reg(AR2315_RESET, reg);
+	msleep(10);
+
+	ar231x_mask_reg(AR2315_ENDIAN_CTL, 0,
+		AR2315_CONFIG_PCIAHB | AR2315_CONFIG_PCIAHB_BRIDGE);
+
+	ar231x_write_reg(AR2315_PCICLK, AR2315_PCICLK_PLLC_CLKM |
+		(AR2315_PCICLK_IN_FREQ_DIV_6 << AR2315_PCICLK_DIV_S));
+	ar231x_mask_reg(AR2315_AHB_ARB_CTL, 0, AR2315_ARB_PCI);
+	ar231x_mask_reg(AR2315_IF_CTL, AR2315_IF_PCI_CLK_MASK | AR2315_IF_MASK,
+		AR2315_IF_PCI | AR2315_IF_PCI_HOST | AR2315_IF_PCI_INTR |
+		 (AR2315_IF_PCI_CLK_OUTPUT_CLK << AR2315_IF_PCI_CLK_SHIFT));
+
+	/* Reset the PCI bus by setting bits 5-4 in PCI_MCFG */
+	ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, AR2315_PCIMISC_RST_MODE,
+		AR2315_PCIRST_LOW);
+	msleep(100);
+
+	/* Bring the PCI out of reset */
+	ar231x_mask_reg(AR2315_PCI_MISC_CONFIG, AR2315_PCIMISC_RST_MODE,
+		AR2315_PCIRST_HIGH | AR2315_PCICACHE_DIS | 0x8);
+
+	ar231x_write_reg(AR2315_PCI_UNCACHE_CFG,
+			0x1E | /* 1GB uncached */
+			(1 << 5) | /* Enable uncached */
+			(0x2 << 30) /* Base: 0x80000000 */
+	);
+	ar231x_read_reg(AR2315_PCI_UNCACHE_CFG);
+
+	msleep(500);
+
+	/* dirty hack - anyone with a datasheet that knows the memory map ? */
+	ioport_resource.start = 0x10000000;
+	ioport_resource.end = 0xffffffff;
+	iomem_resource.start = 0x10000000;
+	iomem_resource.end = 0xffffffff;
+
+	register_pci_controller(&ar231x_pci_controller);
+
+	return 0;
+}
+
+arch_initcall(ar2315_pci_init);
+--- a/arch/mips/ar231x/Kconfig
+++ b/arch/mips/ar231x/Kconfig
+@@ -15,3 +15,13 @@ config ATHEROS_AR2315
+ 	select SYS_SUPPORTS_BIG_ENDIAN
+ 	select GENERIC_GPIO
+ 	default y
+
+config ATHEROS_AR2315_PCI
+	bool "PCI support"
+	depends on ATHEROS_AR2315
+	select HW_HAS_PCI
+	select PCI
+	select USB_ARCH_HAS_HCD
+	select USB_ARCH_HAS_OHCI
+	select USB_ARCH_HAS_EHCI
+	default y
+--- a/arch/mips/ar231x/ar2315.c
+++ b/arch/mips/ar231x/ar2315.c
+@@ -61,6 +61,27 @@ static inline void ar2315_gpio_irq(void)
+ 	do_IRQ(AR531X_GPIO_IRQ_BASE + fls(pend) - 1);
+ }
+ 
+#ifdef CONFIG_ATHEROS_AR2315_PCI
+static inline void pci_abort_irq(void)
+{
+	ar231x_write_reg(AR2315_PCI_INT_STATUS, AR2315_PCI_ABORT_INT);
+}
+
+static inline void pci_ack_irq(void)
+{
+	ar231x_write_reg(AR2315_PCI_INT_STATUS, AR2315_PCI_EXT_INT);
+}
+
+void ar2315_pci_irq(int irq)
+{
+	if (ar231x_read_reg(AR2315_PCI_INT_STATUS) == AR2315_PCI_ABORT_INT)
+		pci_abort_irq();
+	else {
+		do_IRQ(irq);
+		pci_ack_irq();
+	}
+}
+#endif /* CONFIG_ATHEROS_AR2315_PCI */
+ 
+ /*
+  * Called when an interrupt is received, this function
+@@ -79,6 +100,10 @@ ar2315_irq_dispatch(void)
+ 		do_IRQ(AR2315_IRQ_WLAN0_INTRS);
+ 	else if (pending & CAUSEF_IP4)
+ 		do_IRQ(AR2315_IRQ_ENET0_INTRS);
+#ifdef CONFIG_ATHEROS_AR2315_PCI
+	else if (pending & CAUSEF_IP5)
+		ar2315_pci_irq(AR2315_IRQ_LCBUS_PCI);
+#endif
+ 	else if (pending & CAUSEF_IP2) {
+ 		unsigned int misc_intr = ar231x_read_reg(AR2315_ISR) & ar231x_read_reg(AR2315_IMR);
+