openwrt_chaos_calmer/target/linux/ramips/patches-3.18/0016-MIPS-ralink-add-MT7621-pcie-driver.patch

From 95d7eb13a864ef666cea7f0e86349e86d80d28ce Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Sun, 16 Mar 2014 05:22:39 +0000
Subject: [PATCH 16/57] MIPS: ralink: add MT7621 pcie driver

Signed-off-by: John Crispin <blogic@openwrt.org>
---
 arch/mips/pci/Makefile     |    1 +
 arch/mips/pci/pci-mt7621.c |  797 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 798 insertions(+)
 create mode 100644 arch/mips/pci/pci-mt7621.c

--- a/arch/mips/pci/Makefile
+++ b/arch/mips/pci/Makefile
@@ -42,6 +42,7 @@ obj-$(CONFIG_SIBYTE_BCM1x80)	+= pci-bcm1
 obj-$(CONFIG_SNI_RM)		+= fixup-sni.o ops-sni.o
 obj-$(CONFIG_LANTIQ)		+= fixup-lantiq.o
 obj-$(CONFIG_PCI_LANTIQ)	+= pci-lantiq.o ops-lantiq.o
+obj-$(CONFIG_SOC_MT7621)	+= pci-mt7621.o
 obj-$(CONFIG_SOC_RT3883)	+= pci-rt3883.o
 obj-$(CONFIG_TANBAC_TB0219)	+= fixup-tb0219.o
 obj-$(CONFIG_TANBAC_TB0226)	+= fixup-tb0226.o
--- /dev/null
+++ b/arch/mips/pci/pci-mt7621.c
@@ -0,0 +1,813 @@
+/**************************************************************************
+ *
+ *  BRIEF MODULE DESCRIPTION
+ *     PCI init for Ralink RT2880 solution
+ *
+ *  Copyright 2007 Ralink Inc. (bruce_chang@ralinktech.com.tw)
+ *
+ *  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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  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.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ **************************************************************************
+ * May 2007 Bruce Chang
+ * Initial Release
+ *
+ * May 2009 Bruce Chang
+ * support RT2880/RT3883 PCIe
+ *
+ * May 2011 Bruce Chang
+ * support RT6855/MT7620 PCIe
+ *
+ **************************************************************************
+ */
+
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include <asm/pci.h>
+#include <asm/io.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/of_pci.h>
+#include <linux/platform_device.h>
+
+#include <ralink_regs.h>
+
+extern void pcie_phy_init(void);
+extern void chk_phy_pll(void);
+
+/*
+ * These functions and structures provide the BIOS scan and mapping of the PCI
+ * devices.
+ */
+
+#define CONFIG_PCIE_PORT0
+#define CONFIG_PCIE_PORT1
+#define CONFIG_PCIE_PORT2
+#define RALINK_PCIE0_CLK_EN             (1<<24)
+#define RALINK_PCIE1_CLK_EN             (1<<25)
+#define RALINK_PCIE2_CLK_EN             (1<<26)
+
+#define RALINK_PCI_CONFIG_ADDR                         0x20
+#define RALINK_PCI_CONFIG_DATA_VIRTUAL_REG     0x24
+#define SURFBOARDINT_PCIE0       12      /* PCIE0 */
+#define RALINK_INT_PCIE0         SURFBOARDINT_PCIE0
+#define RALINK_INT_PCIE1         SURFBOARDINT_PCIE1
+#define RALINK_INT_PCIE2         SURFBOARDINT_PCIE2
+#define SURFBOARDINT_PCIE1       32     /* PCIE1 */
+#define SURFBOARDINT_PCIE2       33     /* PCIE2 */
+#define RALINK_PCI_MEMBASE              *(volatile u32 *)(RALINK_PCI_BASE + 0x0028)
+#define RALINK_PCI_IOBASE               *(volatile u32 *)(RALINK_PCI_BASE + 0x002C)
+#define RALINK_PCIE0_RST                (1<<24)
+#define RALINK_PCIE1_RST                (1<<25)
+#define RALINK_PCIE2_RST                (1<<26)
+#define RALINK_SYSCTL_BASE              0xBE000000
+
+#define RALINK_PCI_PCICFG_ADDR          *(volatile u32 *)(RALINK_PCI_BASE + 0x0000)
+#define RALINK_PCI_PCIMSK_ADDR          *(volatile u32 *)(RALINK_PCI_BASE + 0x000C)
+#define RALINK_PCI_BASE                 0xBE140000
+
+#define RALINK_PCIEPHY_P0P1_CTL_OFFSET (RALINK_PCI_BASE + 0x9000)
+#define RT6855_PCIE0_OFFSET     0x2000
+#define RT6855_PCIE1_OFFSET     0x3000
+#define RT6855_PCIE2_OFFSET     0x4000
+
+#define RALINK_PCI0_BAR0SETUP_ADDR      *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0010)
+#define RALINK_PCI0_IMBASEBAR0_ADDR     *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0018)
+#define RALINK_PCI0_ID                  *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0030)
+#define RALINK_PCI0_CLASS               *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0034)
+#define RALINK_PCI0_SUBID               *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0038)
+#define RALINK_PCI0_STATUS              *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0050)
+#define RALINK_PCI0_DERR                *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0060)
+#define RALINK_PCI0_ECRC                *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE0_OFFSET + 0x0064)
+
+#define RALINK_PCI1_BAR0SETUP_ADDR      *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0010)
+#define RALINK_PCI1_IMBASEBAR0_ADDR     *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0018)
+#define RALINK_PCI1_ID                  *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0030)
+#define RALINK_PCI1_CLASS               *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0034)
+#define RALINK_PCI1_SUBID               *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0038)
+#define RALINK_PCI1_STATUS              *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0050)
+#define RALINK_PCI1_DERR                *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0060)
+#define RALINK_PCI1_ECRC                *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE1_OFFSET + 0x0064)
+
+#define RALINK_PCI2_BAR0SETUP_ADDR      *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0010)
+#define RALINK_PCI2_IMBASEBAR0_ADDR     *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0018)
+#define RALINK_PCI2_ID                  *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0030)
+#define RALINK_PCI2_CLASS               *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0034)
+#define RALINK_PCI2_SUBID               *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0038)
+#define RALINK_PCI2_STATUS              *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0050)
+#define RALINK_PCI2_DERR                *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0060)
+#define RALINK_PCI2_ECRC                *(volatile u32 *)(RALINK_PCI_BASE + RT6855_PCIE2_OFFSET + 0x0064)
+
+#define RALINK_PCIEPHY_P0P1_CTL_OFFSET  (RALINK_PCI_BASE + 0x9000)
+#define RALINK_PCIEPHY_P2_CTL_OFFSET    (RALINK_PCI_BASE + 0xA000)
+
+
+#define MV_WRITE(ofs, data)  \
+        *(volatile u32 *)(RALINK_PCI_BASE+(ofs)) = cpu_to_le32(data)
+#define MV_READ(ofs, data)   \
+	        *(data) = le32_to_cpu(*(volatile u32 *)(RALINK_PCI_BASE+(ofs)))
+#define MV_READ_DATA(ofs)    \
+		        le32_to_cpu(*(volatile u32 *)(RALINK_PCI_BASE+(ofs)))
+
+#define MV_WRITE_16(ofs, data)  \
+        *(volatile u16 *)(RALINK_PCI_BASE+(ofs)) = cpu_to_le16(data)
+#define MV_READ_16(ofs, data)   \
+	        *(data) = le16_to_cpu(*(volatile u16 *)(RALINK_PCI_BASE+(ofs)))
+
+#define MV_WRITE_8(ofs, data)  \
+        *(volatile u8 *)(RALINK_PCI_BASE+(ofs)) = data
+#define MV_READ_8(ofs, data)   \
+	        *(data) = *(volatile u8 *)(RALINK_PCI_BASE+(ofs))
+
+
+
+#define RALINK_PCI_MM_MAP_BASE	0x60000000
+#define RALINK_PCI_IO_MAP_BASE	0x1e160000
+
+#define RALINK_SYSTEM_CONTROL_BASE	0xbe000000
+#define GPIO_PERST
+#define ASSERT_SYSRST_PCIE(val)		do {	\
+						if (*(unsigned int *)(0xbe00000c) == 0x00030101)	\
+							RALINK_RSTCTRL |= val;	\
+						else	\
+							RALINK_RSTCTRL &= ~val;	\
+					} while(0)
+#define DEASSERT_SYSRST_PCIE(val) 	do {	\
+						if (*(unsigned int *)(0xbe00000c) == 0x00030101)	\
+							RALINK_RSTCTRL &= ~val;	\
+						else	\
+							RALINK_RSTCTRL |= val;	\
+					} while(0)
+#define RALINK_SYSCFG1			*(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x14)
+#define RALINK_CLKCFG1			*(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x30)
+#define RALINK_RSTCTRL			*(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x34)
+#define RALINK_GPIOMODE			*(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x60)
+#define RALINK_PCIE_CLK_GEN		*(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x7c)
+#define RALINK_PCIE_CLK_GEN1		*(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x80)
+#define PPLL_CFG1			*(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0x9c)
+#define PPLL_DRV			*(unsigned int *)(RALINK_SYSTEM_CONTROL_BASE + 0xa0)
+//RALINK_SYSCFG1 bit
+#define RALINK_PCI_HOST_MODE_EN		(1<<7)
+#define RALINK_PCIE_RC_MODE_EN		(1<<8)
+//RALINK_RSTCTRL bit
+#define RALINK_PCIE_RST			(1<<23)
+#define RALINK_PCI_RST			(1<<24)
+//RALINK_CLKCFG1 bit
+#define RALINK_PCI_CLK_EN		(1<<19)
+#define RALINK_PCIE_CLK_EN		(1<<21)
+//RALINK_GPIOMODE bit
+#define PCI_SLOTx2			(1<<11)
+#define PCI_SLOTx1			(2<<11)
+//MTK PCIE PLL bit
+#define PDRV_SW_SET			(1<<31)
+#define LC_CKDRVPD_			(1<<19)
+
+#define MEMORY_BASE 0x0
+static int pcie_link_status = 0;
+
+#define PCI_ACCESS_READ_1  0
+#define PCI_ACCESS_READ_2  1
+#define PCI_ACCESS_READ_4  2
+#define PCI_ACCESS_WRITE_1 3
+#define PCI_ACCESS_WRITE_2 4
+#define PCI_ACCESS_WRITE_4 5
+
+static int config_access(unsigned char access_type, struct pci_bus *bus,
+			unsigned int devfn, unsigned int where, u32 * data)
+{
+	unsigned int slot = PCI_SLOT(devfn);
+	u8 func = PCI_FUNC(devfn);
+	uint32_t address_reg, data_reg;
+	unsigned int address;
+
+	address_reg = RALINK_PCI_CONFIG_ADDR;
+	data_reg = RALINK_PCI_CONFIG_DATA_VIRTUAL_REG;
+
+	address = (((where&0xF00)>>8)<<24) |(bus->number << 16) | (slot << 11) | (func << 8) | (where & 0xfc) | 0x80000000;
+	MV_WRITE(address_reg, address);
+
+	switch(access_type) {
+	case PCI_ACCESS_WRITE_1:
+		MV_WRITE_8(data_reg+(where&0x3), *data);
+		break;
+	case PCI_ACCESS_WRITE_2:
+		MV_WRITE_16(data_reg+(where&0x3), *data);
+		break;
+	case PCI_ACCESS_WRITE_4:
+		MV_WRITE(data_reg, *data);
+		break;
+	case PCI_ACCESS_READ_1:
+		MV_READ_8( data_reg+(where&0x3), data);
+		break;
+	case PCI_ACCESS_READ_2:
+		MV_READ_16(data_reg+(where&0x3), data);
+		break;
+	case PCI_ACCESS_READ_4:
+		MV_READ(data_reg, data);
+		break;
+	default:
+		printk("no specify access type\n");
+		break;
+	}
+	return 0;
+}
+
+static int
+read_config_byte(struct pci_bus *bus, unsigned int devfn, int where, u8 * val)
+{
+	return config_access(PCI_ACCESS_READ_1, bus, devfn, (unsigned int)where, (u32 *)val);
+}
+
+static int
+read_config_word(struct pci_bus *bus, unsigned int devfn, int where, u16 * val)
+{
+	return config_access(PCI_ACCESS_READ_2, bus, devfn, (unsigned int)where, (u32 *)val);
+}
+
+static int
+read_config_dword(struct pci_bus *bus, unsigned int devfn, int where, u32 * val)
+{
+	return config_access(PCI_ACCESS_READ_4, bus, devfn, (unsigned int)where, (u32 *)val);
+}
+
+static int
+write_config_byte(struct pci_bus *bus, unsigned int devfn, int where, u8 val)
+{
+	if (config_access(PCI_ACCESS_WRITE_1, bus, devfn, (unsigned int)where, (u32 *)&val))
+		return -1;
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int
+write_config_word(struct pci_bus *bus, unsigned int devfn, int where, u16 val)
+{
+	if (config_access(PCI_ACCESS_WRITE_2, bus, devfn, where, (u32 *)&val))
+		return -1;
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int
+write_config_dword(struct pci_bus *bus, unsigned int devfn, int where, u32 val)
+{
+	if (config_access(PCI_ACCESS_WRITE_4, bus, devfn, where, &val))
+		return -1;
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+
+static int
+pci_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 * val)
+{
+	switch (size) {
+	case 1:
+		return read_config_byte(bus, devfn, where, (u8 *) val);
+	case 2:
+		return read_config_word(bus, devfn, where, (u16 *) val);
+	default:
+		return read_config_dword(bus, devfn, where, val);
+	}
+}
+
+static int
+pci_config_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val)
+{
+	switch (size) {
+	case 1:
+		return write_config_byte(bus, devfn, where, (u8) val);
+	case 2:
+		return write_config_word(bus, devfn, where, (u16) val);
+	default:
+		return write_config_dword(bus, devfn, where, val);
+	}
+}
+
+struct pci_ops mt7621_pci_ops= {
+	.read		=  pci_config_read,
+	.write		= pci_config_write,
+};
+
+static struct resource mt7621_res_pci_mem1 = {
+	.name		= "PCI MEM1",
+	.start		= RALINK_PCI_MM_MAP_BASE,
+	.end		= (u32)((RALINK_PCI_MM_MAP_BASE + (unsigned char *)0x0fffffff)),
+	.flags		= IORESOURCE_MEM,
+};
+static struct resource mt7621_res_pci_io1 = {
+	.name		= "PCI I/O1",
+	.start		= RALINK_PCI_IO_MAP_BASE,
+	.end		= (u32)((RALINK_PCI_IO_MAP_BASE + (unsigned char *)0x0ffff)),
+	.flags		= IORESOURCE_IO,
+};
+
+static struct pci_controller mt7621_controller = {
+	.pci_ops	= &mt7621_pci_ops,
+	.mem_resource	= &mt7621_res_pci_mem1,
+	.io_resource	= &mt7621_res_pci_io1,
+	.mem_offset	= 0x00000000UL,
+	.io_offset	= 0x00000000UL,
+	.io_map_base	= 0xa0000000,
+};
+
+static void
+read_config(unsigned long bus, unsigned long dev, unsigned long func, unsigned long reg, unsigned long *val)
+{
+	unsigned int address_reg, data_reg, address;
+
+	address_reg = RALINK_PCI_CONFIG_ADDR;
+        data_reg = RALINK_PCI_CONFIG_DATA_VIRTUAL_REG;
+	address = (((reg & 0xF00)>>8)<<24) | (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) | 0x80000000 ;
+        MV_WRITE(address_reg, address);
+        MV_READ(data_reg, val);
+	return;
+}
+
+static void
+write_config(unsigned long bus, unsigned long dev, unsigned long func, unsigned long reg, unsigned long val)
+{
+	unsigned int address_reg, data_reg, address;
+
+	address_reg = RALINK_PCI_CONFIG_ADDR;
+	data_reg = RALINK_PCI_CONFIG_DATA_VIRTUAL_REG;
+	address = (((reg & 0xF00)>>8)<<24) | (bus << 16) | (dev << 11) | (func << 8) | (reg & 0xfc) | 0x80000000 ;
+	MV_WRITE(address_reg, address);
+	MV_WRITE(data_reg, val);
+	return;
+}
+
+
+int __init
+pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+	u16 cmd;
+	u32 val;
+	int irq = 0;
+
+	if ((dev->bus->number == 0) && (slot == 0)) {
+		write_config(0, 0, 0, PCI_BASE_ADDRESS_0, MEMORY_BASE);
+		read_config(0, 0, 0, PCI_BASE_ADDRESS_0, (unsigned long *)&val);
+		printk("BAR0 at slot 0 = %x\n", val);
+		printk("bus=0x%x, slot = 0x%x\n",dev->bus->number, slot);
+	} else if((dev->bus->number == 0) && (slot == 0x1)) {
+		write_config(0, 1, 0, PCI_BASE_ADDRESS_0, MEMORY_BASE);
+		read_config(0, 1, 0, PCI_BASE_ADDRESS_0, (unsigned long *)&val);
+		printk("BAR0 at slot 1 = %x\n", val);
+		printk("bus=0x%x, slot = 0x%x\n",dev->bus->number, slot);
+	} else if((dev->bus->number == 0) && (slot == 0x2)) {
+		write_config(0, 2, 0, PCI_BASE_ADDRESS_0, MEMORY_BASE);
+		read_config(0, 2, 0, PCI_BASE_ADDRESS_0, (unsigned long *)&val);
+		printk("BAR0 at slot 2 = %x\n", val);
+		printk("bus=0x%x, slot = 0x%x\n",dev->bus->number, slot);
+	} else if ((dev->bus->number == 1) && (slot == 0x0)) {
+		switch (pcie_link_status) {
+		case 2:
+		case 6:
+			irq = RALINK_INT_PCIE1;
+			break;
+		case 4:
+			irq = RALINK_INT_PCIE2;
+			break;
+		default:
+			irq = RALINK_INT_PCIE0;
+		}
+		printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev->bus->number, slot, dev->irq);
+	} else if ((dev->bus->number == 2) && (slot == 0x0)) {
+		switch (pcie_link_status) {
+		case 5:
+		case 6:
+			irq = RALINK_INT_PCIE2;
+			break;
+		default:
+			irq = RALINK_INT_PCIE1;
+		}
+		printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev->bus->number, slot, dev->irq);
+	} else if ((dev->bus->number == 2) && (slot == 0x1)) {
+		switch (pcie_link_status) {
+		case 5:
+		case 6:
+			irq = RALINK_INT_PCIE2;
+			break;
+		default:
+			irq = RALINK_INT_PCIE1;
+		}
+		printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev->bus->number, slot, dev->irq);
+	} else if ((dev->bus->number ==3) && (slot == 0x0)) {
+		irq = RALINK_INT_PCIE2;
+		printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev->bus->number, slot, dev->irq);
+	} else if ((dev->bus->number ==3) && (slot == 0x1)) {
+		irq = RALINK_INT_PCIE2;
+		printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev->bus->number, slot, dev->irq);
+	} else if ((dev->bus->number ==3) && (slot == 0x2)) {
+		irq = RALINK_INT_PCIE2;
+		printk("bus=0x%x, slot = 0x%x, irq=0x%x\n",dev->bus->number, slot, dev->irq);
+	} else {
+		printk("bus=0x%x, slot = 0x%x\n",dev->bus->number, slot);
+		return 0;
+	}
+
+	pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 0x14);  //configure cache line size 0x14
+	pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xFF);  //configure latency timer 0x10
+	pci_read_config_word(dev, PCI_COMMAND, &cmd);
+	cmd = cmd | PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
+	pci_write_config_word(dev, PCI_COMMAND, cmd);
+	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
+	return irq;
+}
+
+void
+set_pcie_phy(u32 *addr, int start_b, int bits, int val)
+{
+//	printk("0x%p:", addr);
+//	printk(" %x", *addr);
+	*(unsigned int *)(addr) &= ~(((1<<bits) - 1)<<start_b);
+	*(unsigned int *)(addr) |= val << start_b;
+//	printk(" -> %x\n", *addr);
+}
+
+void
+bypass_pipe_rst(void)
+{
+#if defined (CONFIG_PCIE_PORT0)
+	/* PCIe Port 0 */
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x02c), 12, 1, 0x01);	// rg_pe1_pipe_rst_b
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x02c),  4, 1, 0x01);	// rg_pe1_pipe_cmd_frc[4]
+#endif
+#if defined (CONFIG_PCIE_PORT1)
+	/* PCIe Port 1 */
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x12c), 12, 1, 0x01);	// rg_pe1_pipe_rst_b
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x12c),  4, 1, 0x01);	// rg_pe1_pipe_cmd_frc[4]
+#endif
+#if defined (CONFIG_PCIE_PORT2)
+	/* PCIe Port 2 */
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x02c), 12, 1, 0x01);	// rg_pe1_pipe_rst_b
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x02c),  4, 1, 0x01);	// rg_pe1_pipe_cmd_frc[4]
+#endif
+}
+
+void
+set_phy_for_ssc(void)
+{
+	unsigned long reg = (*(volatile u32 *)(RALINK_SYSCTL_BASE + 0x10));
+
+	reg = (reg >> 6) & 0x7;
+#if defined (CONFIG_PCIE_PORT0) || defined (CONFIG_PCIE_PORT1)
+	/* Set PCIe Port0 & Port1 PHY to disable SSC */
+	/* Debug Xtal Type */
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x400),  8, 1, 0x01);	// rg_pe1_frc_h_xtal_type
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x400),  9, 2, 0x00);	// rg_pe1_h_xtal_type
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x000),  4, 1, 0x01);	// rg_pe1_frc_phy_en               //Force Port 0 enable control
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x100),  4, 1, 0x01);	// rg_pe1_frc_phy_en               //Force Port 1 enable control
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x000),  5, 1, 0x00);	// rg_pe1_phy_en                   //Port 0 disable
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x100),  5, 1, 0x00);	// rg_pe1_phy_en                   //Port 1 disable
+	if(reg <= 5 && reg >= 3) { 	// 40MHz Xtal
+		set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490),  6, 2, 0x01);	// RG_PE1_H_PLL_PREDIV             //Pre-divider ratio (for host mode)
+		printk("***** Xtal 40MHz *****\n");
+	} else {			// 25MHz | 20MHz Xtal
+		set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490),  6, 2, 0x00);	// RG_PE1_H_PLL_PREDIV             //Pre-divider ratio (for host mode)
+		if (reg >= 6) { 	
+			printk("***** Xtal 25MHz *****\n");
+			set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x4bc),  4, 2, 0x01);	// RG_PE1_H_PLL_FBKSEL             //Feedback clock select
+			set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x49c),  0,31, 0x18000000);	// RG_PE1_H_LCDDS_PCW_NCPO         //DDS NCPO PCW (for host mode)
+			set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x4a4),  0,16, 0x18d);	// RG_PE1_H_LCDDS_SSC_PRD          //DDS SSC dither period control
+			set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x4a8),  0,12, 0x4a);	// RG_PE1_H_LCDDS_SSC_DELTA        //DDS SSC dither amplitude control
+			set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x4a8), 16,12, 0x4a);	// RG_PE1_H_LCDDS_SSC_DELTA1       //DDS SSC dither amplitude control for initial
+		} else {
+			printk("***** Xtal 20MHz *****\n");
+		}
+	}
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x4a0),  5, 1, 0x01);	// RG_PE1_LCDDS_CLK_PH_INV         //DDS clock inversion
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490), 22, 2, 0x02);	// RG_PE1_H_PLL_BC                 
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490), 18, 4, 0x06);	// RG_PE1_H_PLL_BP                 
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490), 12, 4, 0x02);	// RG_PE1_H_PLL_IR                 
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490),  8, 4, 0x01);	// RG_PE1_H_PLL_IC                 
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x4ac), 16, 3, 0x00);	// RG_PE1_H_PLL_BR                 
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x490),  1, 3, 0x02);	// RG_PE1_PLL_DIVEN                
+	if(reg <= 5 && reg >= 3) { 	// 40MHz Xtal
+		set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x414),  6, 2, 0x01);	// rg_pe1_mstckdiv		//value of da_pe1_mstckdiv when force mode enable
+		set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x414),  5, 1, 0x01);	// rg_pe1_frc_mstckdiv          //force mode enable of da_pe1_mstckdiv      
+	}
+	/* Enable PHY and disable force mode */
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x000),  5, 1, 0x01);	// rg_pe1_phy_en                   //Port 0 enable
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x100),  5, 1, 0x01);	// rg_pe1_phy_en                   //Port 1 enable
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x000),  4, 1, 0x00);	// rg_pe1_frc_phy_en               //Force Port 0 disable control
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P0P1_CTL_OFFSET + 0x100),  4, 1, 0x00);	// rg_pe1_frc_phy_en               //Force Port 1 disable control
+#endif
+#if defined (CONFIG_PCIE_PORT2)
+	/* Set PCIe Port2 PHY to disable SSC */
+	/* Debug Xtal Type */
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x400),  8, 1, 0x01);	// rg_pe1_frc_h_xtal_type
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x400),  9, 2, 0x00);	// rg_pe1_h_xtal_type
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x000),  4, 1, 0x01);	// rg_pe1_frc_phy_en               //Force Port 0 enable control
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x000),  5, 1, 0x00);	// rg_pe1_phy_en                   //Port 0 disable
+	if(reg <= 5 && reg >= 3) { 	// 40MHz Xtal
+		set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490),  6, 2, 0x01);	// RG_PE1_H_PLL_PREDIV             //Pre-divider ratio (for host mode)
+	} else {			// 25MHz | 20MHz Xtal
+		set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490),  6, 2, 0x00);	// RG_PE1_H_PLL_PREDIV             //Pre-divider ratio (for host mode)
+		if (reg >= 6) { 	// 25MHz Xtal
+			set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x4bc),  4, 2, 0x01);	// RG_PE1_H_PLL_FBKSEL             //Feedback clock select
+			set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x49c),  0,31, 0x18000000);	// RG_PE1_H_LCDDS_PCW_NCPO         //DDS NCPO PCW (for host mode)
+			set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x4a4),  0,16, 0x18d);	// RG_PE1_H_LCDDS_SSC_PRD          //DDS SSC dither period control
+			set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x4a8),  0,12, 0x4a);	// RG_PE1_H_LCDDS_SSC_DELTA        //DDS SSC dither amplitude control
+			set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x4a8), 16,12, 0x4a);	// RG_PE1_H_LCDDS_SSC_DELTA1       //DDS SSC dither amplitude control for initial
+		}
+	}
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x4a0),  5, 1, 0x01);	// RG_PE1_LCDDS_CLK_PH_INV         //DDS clock inversion
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490), 22, 2, 0x02);	// RG_PE1_H_PLL_BC                 
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490), 18, 4, 0x06);	// RG_PE1_H_PLL_BP                 
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490), 12, 4, 0x02);	// RG_PE1_H_PLL_IR                 
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490),  8, 4, 0x01);	// RG_PE1_H_PLL_IC                 
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x4ac), 16, 3, 0x00);	// RG_PE1_H_PLL_BR                 
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x490),  1, 3, 0x02);	// RG_PE1_PLL_DIVEN                
+	if(reg <= 5 && reg >= 3) { 	// 40MHz Xtal
+		set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x414),  6, 2, 0x01);	// rg_pe1_mstckdiv		//value of da_pe1_mstckdiv when force mode enable
+		set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x414),  5, 1, 0x01);	// rg_pe1_frc_mstckdiv          //force mode enable of da_pe1_mstckdiv      
+	}
+	/* Enable PHY and disable force mode */
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x000),  5, 1, 0x01);	// rg_pe1_phy_en                   //Port 0 enable
+	set_pcie_phy((u32 *)(RALINK_PCIEPHY_P2_CTL_OFFSET + 0x000),  4, 1, 0x00);	// rg_pe1_frc_phy_en               //Force Port 0 disable control
+#endif
+}
+
+static int mt7621_pci_probe(struct platform_device *pdev)
+{
+	unsigned long val = 0;
+
+	iomem_resource.start = 0;
+	iomem_resource.end= ~0;
+	ioport_resource.start= 0;
+	ioport_resource.end = ~0;
+
+#if defined (CONFIG_PCIE_PORT0)
+	val = RALINK_PCIE0_RST;
+#endif
+#if defined (CONFIG_PCIE_PORT1)
+	val |= RALINK_PCIE1_RST;
+#endif
+#if defined (CONFIG_PCIE_PORT2)
+	val |= RALINK_PCIE2_RST;
+#endif
+	ASSERT_SYSRST_PCIE(RALINK_PCIE0_RST | RALINK_PCIE1_RST | RALINK_PCIE2_RST);
+	printk("pull PCIe RST: RALINK_RSTCTRL = %x\n", RALINK_RSTCTRL);
+#if defined GPIO_PERST /* add GPIO control instead of PERST_N */ /*chhung*/
+	*(unsigned int *)(0xbe000060) &= ~(0x3<<10 | 0x3<<3);
+	*(unsigned int *)(0xbe000060) |= 0x1<<10 | 0x1<<3;
+	mdelay(100);
+	*(unsigned int *)(0xbe000600) |= 0x1<<19 | 0x1<<8 | 0x1<<7; // use GPIO19/GPIO8/GPIO7 (PERST_N/UART_RXD3/UART_TXD3)
+	mdelay(100);
+	*(unsigned int *)(0xbe000620) &= ~(0x1<<19 | 0x1<<8 | 0x1<<7);		// clear DATA
+
+	mdelay(100);
+#else
+	*(unsigned int *)(0xbe000060) &= ~0x00000c00;
+#endif
+#if defined (CONFIG_PCIE_PORT0)
+	val = RALINK_PCIE0_RST;
+#endif
+#if defined (CONFIG_PCIE_PORT1)
+	val |= RALINK_PCIE1_RST;
+#endif
+#if defined (CONFIG_PCIE_PORT2)
+	val |= RALINK_PCIE2_RST;
+#endif
+	DEASSERT_SYSRST_PCIE(val);
+	printk("release PCIe RST: RALINK_RSTCTRL = %x\n", RALINK_RSTCTRL);
+
+	if ((*(unsigned int *)(0xbe00000c)&0xFFFF) == 0x0101) // MT7621 E2
+		bypass_pipe_rst();
+	set_phy_for_ssc();
+	printk("release PCIe RST: RALINK_RSTCTRL = %x\n", RALINK_RSTCTRL);
+
+#if defined (CONFIG_PCIE_PORT0)
+	read_config(0, 0, 0, 0x70c, &val);
+	printk("Port 0 N_FTS = %x\n", (unsigned int)val);
+#endif
+#if defined (CONFIG_PCIE_PORT1)
+	read_config(0, 1, 0, 0x70c, &val);
+	printk("Port 1 N_FTS = %x\n", (unsigned int)val);
+#endif
+#if defined (CONFIG_PCIE_PORT2)
+	read_config(0, 2, 0, 0x70c, &val);
+	printk("Port 2 N_FTS = %x\n", (unsigned int)val);
+#endif
+
+	RALINK_RSTCTRL = (RALINK_RSTCTRL | RALINK_PCIE_RST);
+	RALINK_SYSCFG1 &= ~(0x30);
+	RALINK_SYSCFG1 |= (2<<4);
+	RALINK_PCIE_CLK_GEN &= 0x7fffffff;
+	RALINK_PCIE_CLK_GEN1 &= 0x80ffffff;
+	RALINK_PCIE_CLK_GEN1 |= 0xa << 24;
+	RALINK_PCIE_CLK_GEN |= 0x80000000;
+	mdelay(50);
+	RALINK_RSTCTRL = (RALINK_RSTCTRL & ~RALINK_PCIE_RST);
+	
+
+#if defined GPIO_PERST /* add GPIO control instead of PERST_N */  /*chhung*/
+	*(unsigned int *)(0xbe000620) |= 0x1<<19 | 0x1<<8 | 0x1<<7;		// set DATA
+	mdelay(100);
+#else
+	RALINK_PCI_PCICFG_ADDR &= ~(1<<1); //de-assert PERST
+#endif
+	mdelay(500);
+
+
+	mdelay(500);
+#if defined (CONFIG_PCIE_PORT0)
+	if(( RALINK_PCI0_STATUS & 0x1) == 0)
+	{
+		printk("PCIE0 no card, disable it(RST&CLK)\n");
+		ASSERT_SYSRST_PCIE(RALINK_PCIE0_RST);
+		RALINK_CLKCFG1 = (RALINK_CLKCFG1 & ~RALINK_PCIE0_CLK_EN);
+		pcie_link_status &= ~(1<<0);
+	} else {
+		pcie_link_status |= 1<<0;
+		RALINK_PCI_PCIMSK_ADDR |= (1<<20); // enable pcie1 interrupt
+	}
+#endif
+#if defined (CONFIG_PCIE_PORT1)
+	if(( RALINK_PCI1_STATUS & 0x1) == 0)
+	{
+		printk("PCIE1 no card, disable it(RST&CLK)\n");
+		ASSERT_SYSRST_PCIE(RALINK_PCIE1_RST);
+		RALINK_CLKCFG1 = (RALINK_CLKCFG1 & ~RALINK_PCIE1_CLK_EN);
+		pcie_link_status &= ~(1<<1);
+	} else {
+		pcie_link_status |= 1<<1;
+		RALINK_PCI_PCIMSK_ADDR |= (1<<21); // enable pcie1 interrupt
+	}
+#endif
+#if defined (CONFIG_PCIE_PORT2)
+	if (( RALINK_PCI2_STATUS & 0x1) == 0) {
+		printk("PCIE2 no card, disable it(RST&CLK)\n");
+		ASSERT_SYSRST_PCIE(RALINK_PCIE2_RST);
+		RALINK_CLKCFG1 = (RALINK_CLKCFG1 & ~RALINK_PCIE2_CLK_EN);
+		pcie_link_status &= ~(1<<2);
+	} else {
+		pcie_link_status |= 1<<2;
+		RALINK_PCI_PCIMSK_ADDR |= (1<<22); // enable pcie2 interrupt
+	}
+#endif
+	if (pcie_link_status == 0)
+		return 0;
+
+/*
+pcie(2/1/0) link status	pcie2_num	pcie1_num	pcie0_num
+3'b000			x		x		x
+3'b001			x		x		0
+3'b010			x		0		x
+3'b011			x		1		0
+3'b100			0		x		x
+3'b101			1		x		0
+3'b110			1		0		x
+3'b111			2		1		0
+*/
+	switch(pcie_link_status) {
+	case 2:
+		RALINK_PCI_PCICFG_ADDR &= ~0x00ff0000;
+		RALINK_PCI_PCICFG_ADDR |= 0x1 << 16;	//port0
+		RALINK_PCI_PCICFG_ADDR |= 0x0 << 20;	//port1
+		break;
+	case 4:
+		RALINK_PCI_PCICFG_ADDR &= ~0x0fff0000;
+		RALINK_PCI_PCICFG_ADDR |= 0x1 << 16;	//port0
+		RALINK_PCI_PCICFG_ADDR |= 0x2 << 20;	//port1
+		RALINK_PCI_PCICFG_ADDR |= 0x0 << 24;	//port2
+		break;
+	case 5:
+		RALINK_PCI_PCICFG_ADDR &= ~0x0fff0000;
+		RALINK_PCI_PCICFG_ADDR |= 0x0 << 16;	//port0
+		RALINK_PCI_PCICFG_ADDR |= 0x2 << 20;	//port1
+		RALINK_PCI_PCICFG_ADDR |= 0x1 << 24;	//port2
+		break;
+	case 6:
+		RALINK_PCI_PCICFG_ADDR &= ~0x0fff0000;
+		RALINK_PCI_PCICFG_ADDR |= 0x2 << 16;	//port0
+		RALINK_PCI_PCICFG_ADDR |= 0x0 << 20;	//port1
+		RALINK_PCI_PCICFG_ADDR |= 0x1 << 24;	//port2
+		break;
+	}
+	printk(" -> %x\n", RALINK_PCI_PCICFG_ADDR);
+	//printk(" RALINK_PCI_ARBCTL = %x\n", RALINK_PCI_ARBCTL);
+
+/*
+	ioport_resource.start = mt7621_res_pci_io1.start;
+  	ioport_resource.end = mt7621_res_pci_io1.end;
+*/
+
+	RALINK_PCI_MEMBASE = 0xffffffff; //RALINK_PCI_MM_MAP_BASE;
+	RALINK_PCI_IOBASE = RALINK_PCI_IO_MAP_BASE;
+
+#if defined (CONFIG_PCIE_PORT0)
+	//PCIe0
+	if((pcie_link_status & 0x1) != 0) {
+		RALINK_PCI0_BAR0SETUP_ADDR = 0x7FFF0001;	//open 7FFF:2G; ENABLE
+		RALINK_PCI0_IMBASEBAR0_ADDR = MEMORY_BASE;
+		RALINK_PCI0_CLASS = 0x06040001;
+		printk("PCIE0 enabled\n");
+	}
+#endif
+#if defined (CONFIG_PCIE_PORT1)
+	//PCIe1
+	if ((pcie_link_status & 0x2) != 0) {
+		RALINK_PCI1_BAR0SETUP_ADDR = 0x7FFF0001;	//open 7FFF:2G; ENABLE
+		RALINK_PCI1_IMBASEBAR0_ADDR = MEMORY_BASE;
+		RALINK_PCI1_CLASS = 0x06040001;
+		printk("PCIE1 enabled\n");
+	}
+#endif
+#if defined (CONFIG_PCIE_PORT2)
+	//PCIe2
+	if ((pcie_link_status & 0x4) != 0) {
+		RALINK_PCI2_BAR0SETUP_ADDR = 0x7FFF0001;	//open 7FFF:2G; ENABLE
+		RALINK_PCI2_IMBASEBAR0_ADDR = MEMORY_BASE;
+		RALINK_PCI2_CLASS = 0x06040001;
+		printk("PCIE2 enabled\n");
+	}
+#endif
+
+
+	switch(pcie_link_status) {
+	case 7:
+		read_config(0, 2, 0, 0x4, &val);
+		write_config(0, 2, 0, 0x4, val|0x4);
+		// write_config(0, 1, 0, 0x4, val|0x7);
+		read_config(0, 2, 0, 0x70c, &val);
+		val &= ~(0xff)<<8;
+		val |= 0x50<<8;
+		write_config(0, 2, 0, 0x70c, val);
+	case 3:
+	case 5:
+	case 6:
+		read_config(0, 1, 0, 0x4, &val);
+		write_config(0, 1, 0, 0x4, val|0x4);
+		// write_config(0, 1, 0, 0x4, val|0x7);
+		read_config(0, 1, 0, 0x70c, &val);
+		val &= ~(0xff)<<8;
+		val |= 0x50<<8;
+		write_config(0, 1, 0, 0x70c, val);
+	default:
+		read_config(0, 0, 0, 0x4, &val);
+		write_config(0, 0, 0, 0x4, val|0x4); //bus master enable
+		// write_config(0, 0, 0, 0x4, val|0x7); //bus master enable
+		read_config(0, 0, 0, 0x70c, &val);
+		val &= ~(0xff)<<8;
+		val |= 0x50<<8;
+		write_config(0, 0, 0, 0x70c, val);
+	}
+
+	pci_load_of_ranges(&mt7621_controller, pdev->dev.of_node);
+	register_pci_controller(&mt7621_controller);
+	return 0;
+
+}
+
+int pcibios_plat_dev_init(struct pci_dev *dev)
+{
+	return 0;
+}
+
+static const struct of_device_id mt7621_pci_ids[] = {
+	{ .compatible = "mediatek,mt7621-pci" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mt7621_pci_ids);
+
+static struct platform_driver mt7621_pci_driver = {
+	.probe = mt7621_pci_probe,
+	.driver = {
+		.name = "mt7621-pci",
+		.owner = THIS_MODULE,
+		.of_match_table = of_match_ptr(mt7621_pci_ids),
+	},
+};
+
+static int __init mt7621_pci_init(void)
+{
+	return platform_driver_register(&mt7621_pci_driver);
+}
+
+arch_initcall(mt7621_pci_init);