arch/mips/pci/pci-lantiq.c - kernel/msm - Gitiles

 /*
  *  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.
  *
  *  Copyright (C) 2010 John Crispin <blogic@openwrt.org>
  */

 #include <linux/types.h>
 #include <linux/pci.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/mm.h>
 #include <linux/vmalloc.h>
 #include <linux/platform_device.h>

 #include <asm/pci.h>
 #include <asm/gpio.h>
 #include <asm/addrspace.h>

 #include <lantiq_soc.h>
 #include <lantiq_irq.h>
 #include <lantiq_platform.h>

 #include "pci-lantiq.h"

 #define LTQ_PCI_CFG_BASE		0x17000000
 #define LTQ_PCI_CFG_SIZE		0x00008000
 #define LTQ_PCI_MEM_BASE		0x18000000
 #define LTQ_PCI_MEM_SIZE		0x02000000
 #define LTQ_PCI_IO_BASE			0x1AE00000
 #define LTQ_PCI_IO_SIZE			0x00200000

 #define PCI_CR_FCI_ADDR_MAP0		0x00C0
 #define PCI_CR_FCI_ADDR_MAP1		0x00C4
 #define PCI_CR_FCI_ADDR_MAP2		0x00C8
 #define PCI_CR_FCI_ADDR_MAP3		0x00CC
 #define PCI_CR_FCI_ADDR_MAP4		0x00D0
 #define PCI_CR_FCI_ADDR_MAP5		0x00D4
 #define PCI_CR_FCI_ADDR_MAP6		0x00D8
 #define PCI_CR_FCI_ADDR_MAP7		0x00DC
 #define PCI_CR_CLK_CTRL			0x0000
 #define PCI_CR_PCI_MOD			0x0030
 #define PCI_CR_PC_ARB			0x0080
 #define PCI_CR_FCI_ADDR_MAP11hg		0x00E4
 #define PCI_CR_BAR11MASK		0x0044
 #define PCI_CR_BAR12MASK		0x0048
 #define PCI_CR_BAR13MASK		0x004C
 #define PCI_CS_BASE_ADDR1		0x0010
 #define PCI_CR_PCI_ADDR_MAP11		0x0064
 #define PCI_CR_FCI_BURST_LENGTH		0x00E8
 #define PCI_CR_PCI_EOI			0x002C
 #define PCI_CS_STS_CMD			0x0004

 #define PCI_MASTER0_REQ_MASK_2BITS	8
 #define PCI_MASTER1_REQ_MASK_2BITS	10
 #define PCI_MASTER2_REQ_MASK_2BITS	12
 #define INTERNAL_ARB_ENABLE_BIT		0

 #define LTQ_CGU_IFCCR		0x0018
 #define LTQ_CGU_PCICR		0x0034

 #define ltq_pci_w32(x, y)	ltq_w32((x), ltq_pci_membase + (y))
 #define ltq_pci_r32(x)		ltq_r32(ltq_pci_membase + (x))

 #define ltq_pci_cfg_w32(x, y)	ltq_w32((x), ltq_pci_mapped_cfg + (y))
 #define ltq_pci_cfg_r32(x)	ltq_r32(ltq_pci_mapped_cfg + (x))

 struct ltq_pci_gpio_map {
 	int pin;
 	int alt0;
 	int alt1;
 	int dir;
 	char *name;
 };

 /* the pci core can make use of the following gpios */
 static struct ltq_pci_gpio_map ltq_pci_gpio_map[] = {
 	{ 0, 1, 0, 0, "pci-exin0" },
 	{ 1, 1, 0, 0, "pci-exin1" },
 	{ 2, 1, 0, 0, "pci-exin2" },
 	{ 39, 1, 0, 0, "pci-exin3" },
 	{ 10, 1, 0, 0, "pci-exin4" },
 	{ 9, 1, 0, 0, "pci-exin5" },
 	{ 30, 1, 0, 1, "pci-gnt1" },
 	{ 23, 1, 0, 1, "pci-gnt2" },
 	{ 19, 1, 0, 1, "pci-gnt3" },
 	{ 38, 1, 0, 1, "pci-gnt4" },
 	{ 29, 1, 0, 0, "pci-req1" },
 	{ 31, 1, 0, 0, "pci-req2" },
 	{ 3, 1, 0, 0, "pci-req3" },
 	{ 37, 1, 0, 0, "pci-req4" },
 };

 __iomem void *ltq_pci_mapped_cfg;
 static __iomem void *ltq_pci_membase;

 int (*ltqpci_plat_dev_init)(struct pci_dev *dev) = NULL;

 /* Since the PCI REQ pins can be reused for other functionality, make it
    possible to exclude those from interpretation by the PCI controller */
 static int ltq_pci_req_mask = 0xf;

 static int *ltq_pci_irq_map;

 struct pci_ops ltq_pci_ops = {
 	.read	= ltq_pci_read_config_dword,
 	.write	= ltq_pci_write_config_dword
 };

 static struct resource pci_io_resource = {
 	.name	= "pci io space",
 	.start	= LTQ_PCI_IO_BASE,
 	.end	= LTQ_PCI_IO_BASE + LTQ_PCI_IO_SIZE - 1,
 	.flags	= IORESOURCE_IO
 };

 static struct resource pci_mem_resource = {
 	.name	= "pci memory space",
 	.start	= LTQ_PCI_MEM_BASE,
 	.end	= LTQ_PCI_MEM_BASE + LTQ_PCI_MEM_SIZE - 1,
 	.flags	= IORESOURCE_MEM
 };

 static struct pci_controller ltq_pci_controller = {
 	.pci_ops	= &ltq_pci_ops,
 	.mem_resource	= &pci_mem_resource,
 	.mem_offset	= 0x00000000UL,
 	.io_resource	= &pci_io_resource,
 	.io_offset	= 0x00000000UL,
 };

 int pcibios_plat_dev_init(struct pci_dev *dev)
 {
 	if (ltqpci_plat_dev_init)
 		return ltqpci_plat_dev_init(dev);

 	return 0;
 }

 static u32 ltq_calc_bar11mask(void)
 {
 	u32 mem, bar11mask;

 	/* BAR11MASK value depends on available memory on system. */
 	mem = num_physpages * PAGE_SIZE;
 	bar11mask = (0x0ffffff0 & ~((1 << (fls(mem) - 1)) - 1)) | 8;

 	return bar11mask;
 }

 static void ltq_pci_setup_gpio(int gpio)
 {
 	int i;
 	for (i = 0; i < ARRAY_SIZE(ltq_pci_gpio_map); i++) {
 		if (gpio & (1 << i)) {
 			ltq_gpio_request(ltq_pci_gpio_map[i].pin,
 				ltq_pci_gpio_map[i].alt0,
 				ltq_pci_gpio_map[i].alt1,
 				ltq_pci_gpio_map[i].dir,
 				ltq_pci_gpio_map[i].name);
 		}
 	}
 	ltq_gpio_request(21, 0, 0, 1, "pci-reset");
 	ltq_pci_req_mask = (gpio >> PCI_REQ_SHIFT) & PCI_REQ_MASK;
 }

 static int __devinit ltq_pci_startup(struct ltq_pci_data *conf)
 {
 	u32 temp_buffer;

 	/* set clock to 33Mhz */
 	ltq_cgu_w32(ltq_cgu_r32(LTQ_CGU_IFCCR) & ~0xf00000, LTQ_CGU_IFCCR);
 	ltq_cgu_w32(ltq_cgu_r32(LTQ_CGU_IFCCR) | 0x800000, LTQ_CGU_IFCCR);

 	/* external or internal clock ? */
 	if (conf->clock) {
 		ltq_cgu_w32(ltq_cgu_r32(LTQ_CGU_IFCCR) & ~(1 << 16),
 			LTQ_CGU_IFCCR);
 		ltq_cgu_w32((1 << 30), LTQ_CGU_PCICR);
 	} else {
 		ltq_cgu_w32(ltq_cgu_r32(LTQ_CGU_IFCCR) | (1 << 16),
 			LTQ_CGU_IFCCR);
 		ltq_cgu_w32((1 << 31) | (1 << 30), LTQ_CGU_PCICR);
 	}

 	/* setup pci clock and gpis used by pci */
 	ltq_pci_setup_gpio(conf->gpio);

 	/* enable auto-switching between PCI and EBU */
 	ltq_pci_w32(0xa, PCI_CR_CLK_CTRL);

 	/* busy, i.e. configuration is not done, PCI access has to be retried */
 	ltq_pci_w32(ltq_pci_r32(PCI_CR_PCI_MOD) & ~(1 << 24), PCI_CR_PCI_MOD);
 	wmb();
 	/* BUS Master/IO/MEM access */
 	ltq_pci_cfg_w32(ltq_pci_cfg_r32(PCI_CS_STS_CMD) | 7, PCI_CS_STS_CMD);

 	/* enable external 2 PCI masters */
 	temp_buffer = ltq_pci_r32(PCI_CR_PC_ARB);
 	temp_buffer &= (~(ltq_pci_req_mask << 16));
 	/* enable internal arbiter */
 	temp_buffer |= (1 << INTERNAL_ARB_ENABLE_BIT);
 	/* enable internal PCI master reqest */
 	temp_buffer &= (~(3 << PCI_MASTER0_REQ_MASK_2BITS));

 	/* enable EBU request */
 	temp_buffer &= (~(3 << PCI_MASTER1_REQ_MASK_2BITS));

 	/* enable all external masters request */
 	temp_buffer &= (~(3 << PCI_MASTER2_REQ_MASK_2BITS));
 	ltq_pci_w32(temp_buffer, PCI_CR_PC_ARB);
 	wmb();

 	/* setup BAR memory regions */
 	ltq_pci_w32(0x18000000, PCI_CR_FCI_ADDR_MAP0);
 	ltq_pci_w32(0x18400000, PCI_CR_FCI_ADDR_MAP1);
 	ltq_pci_w32(0x18800000, PCI_CR_FCI_ADDR_MAP2);
 	ltq_pci_w32(0x18c00000, PCI_CR_FCI_ADDR_MAP3);
 	ltq_pci_w32(0x19000000, PCI_CR_FCI_ADDR_MAP4);
 	ltq_pci_w32(0x19400000, PCI_CR_FCI_ADDR_MAP5);
 	ltq_pci_w32(0x19800000, PCI_CR_FCI_ADDR_MAP6);
 	ltq_pci_w32(0x19c00000, PCI_CR_FCI_ADDR_MAP7);
 	ltq_pci_w32(0x1ae00000, PCI_CR_FCI_ADDR_MAP11hg);
 	ltq_pci_w32(ltq_calc_bar11mask(), PCI_CR_BAR11MASK);
 	ltq_pci_w32(0, PCI_CR_PCI_ADDR_MAP11);
 	ltq_pci_w32(0, PCI_CS_BASE_ADDR1);
 	/* both TX and RX endian swap are enabled */
 	ltq_pci_w32(ltq_pci_r32(PCI_CR_PCI_EOI) | 3, PCI_CR_PCI_EOI);
 	wmb();
 	ltq_pci_w32(ltq_pci_r32(PCI_CR_BAR12MASK) | 0x80000000,
 		PCI_CR_BAR12MASK);
 	ltq_pci_w32(ltq_pci_r32(PCI_CR_BAR13MASK) | 0x80000000,
 		PCI_CR_BAR13MASK);
 	/*use 8 dw burst length */
 	ltq_pci_w32(0x303, PCI_CR_FCI_BURST_LENGTH);
 	ltq_pci_w32(ltq_pci_r32(PCI_CR_PCI_MOD) | (1 << 24), PCI_CR_PCI_MOD);
 	wmb();

 	/* setup irq line */
 	ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_PCC_CON) | 0xc, LTQ_EBU_PCC_CON);
 	ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_PCC_IEN) | 0x10, LTQ_EBU_PCC_IEN);

 	/* toggle reset pin */
 	__gpio_set_value(21, 0);
 	wmb();
 	mdelay(1);
 	__gpio_set_value(21, 1);
 	return 0;
 }

 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 {
 	if (ltq_pci_irq_map[slot])
 		return ltq_pci_irq_map[slot];
 	printk(KERN_ERR "lq_pci: trying to map irq for unknown slot %d\n",
 		slot);

 	return 0;
 }

 static int __devinit ltq_pci_probe(struct platform_device *pdev)
 {
 	struct ltq_pci_data *ltq_pci_data =
 		(struct ltq_pci_data *) pdev->dev.platform_data;
 	pci_probe_only = 0;
 	ltq_pci_irq_map = ltq_pci_data->irq;
 	ltq_pci_membase = ioremap_nocache(PCI_CR_BASE_ADDR, PCI_CR_SIZE);
 	ltq_pci_mapped_cfg =
 		ioremap_nocache(LTQ_PCI_CFG_BASE, LTQ_PCI_CFG_BASE);
 	ltq_pci_controller.io_map_base =
 		(unsigned long)ioremap(LTQ_PCI_IO_BASE, LTQ_PCI_IO_SIZE - 1);
 	ltq_pci_startup(ltq_pci_data);
 	register_pci_controller(&ltq_pci_controller);

 	return 0;
 }

 static struct platform_driver
 ltq_pci_driver = {
 	.probe = ltq_pci_probe,
 	.driver = {
 		.name = "ltq_pci",
 		.owner = THIS_MODULE,
 	},
 };

 int __init pcibios_init(void)
 {
 	int ret = platform_driver_register(&ltq_pci_driver);
 	if (ret)
 		printk(KERN_INFO "ltq_pci: Error registering platfom driver!");
 	return ret;
 }

 arch_initcall(pcibios_init);
	/*
	* 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.
	*
	* Copyright (C) 2010 John Crispin <blogic@openwrt.org>
	*/

	#include <linux/types.h>
	#include <linux/pci.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/delay.h>
	#include <linux/mm.h>
	#include <linux/vmalloc.h>
	#include <linux/platform_device.h>

	#include <asm/pci.h>
	#include <asm/gpio.h>
	#include <asm/addrspace.h>

	#include <lantiq_soc.h>
	#include <lantiq_irq.h>
	#include <lantiq_platform.h>

	#include "pci-lantiq.h"

	#define LTQ_PCI_CFG_BASE 0x17000000
	#define LTQ_PCI_CFG_SIZE 0x00008000
	#define LTQ_PCI_MEM_BASE 0x18000000
	#define LTQ_PCI_MEM_SIZE 0x02000000
	#define LTQ_PCI_IO_BASE 0x1AE00000
	#define LTQ_PCI_IO_SIZE 0x00200000

	#define PCI_CR_FCI_ADDR_MAP0 0x00C0
	#define PCI_CR_FCI_ADDR_MAP1 0x00C4
	#define PCI_CR_FCI_ADDR_MAP2 0x00C8
	#define PCI_CR_FCI_ADDR_MAP3 0x00CC
	#define PCI_CR_FCI_ADDR_MAP4 0x00D0
	#define PCI_CR_FCI_ADDR_MAP5 0x00D4
	#define PCI_CR_FCI_ADDR_MAP6 0x00D8
	#define PCI_CR_FCI_ADDR_MAP7 0x00DC
	#define PCI_CR_CLK_CTRL 0x0000
	#define PCI_CR_PCI_MOD 0x0030
	#define PCI_CR_PC_ARB 0x0080
	#define PCI_CR_FCI_ADDR_MAP11hg 0x00E4
	#define PCI_CR_BAR11MASK 0x0044
	#define PCI_CR_BAR12MASK 0x0048
	#define PCI_CR_BAR13MASK 0x004C
	#define PCI_CS_BASE_ADDR1 0x0010
	#define PCI_CR_PCI_ADDR_MAP11 0x0064
	#define PCI_CR_FCI_BURST_LENGTH 0x00E8
	#define PCI_CR_PCI_EOI 0x002C
	#define PCI_CS_STS_CMD 0x0004

	#define PCI_MASTER0_REQ_MASK_2BITS 8
	#define PCI_MASTER1_REQ_MASK_2BITS 10
	#define PCI_MASTER2_REQ_MASK_2BITS 12
	#define INTERNAL_ARB_ENABLE_BIT 0

	#define LTQ_CGU_IFCCR 0x0018
	#define LTQ_CGU_PCICR 0x0034

	#define ltq_pci_w32(x, y) ltq_w32((x), ltq_pci_membase + (y))
	#define ltq_pci_r32(x) ltq_r32(ltq_pci_membase + (x))

	#define ltq_pci_cfg_w32(x, y) ltq_w32((x), ltq_pci_mapped_cfg + (y))
	#define ltq_pci_cfg_r32(x) ltq_r32(ltq_pci_mapped_cfg + (x))

	struct ltq_pci_gpio_map {
	int pin;
	int alt0;
	int alt1;
	int dir;
	char *name;
	};

	/* the pci core can make use of the following gpios */
	static struct ltq_pci_gpio_map ltq_pci_gpio_map[] = {
	{ 0, 1, 0, 0, "pci-exin0" },
	{ 1, 1, 0, 0, "pci-exin1" },
	{ 2, 1, 0, 0, "pci-exin2" },
	{ 39, 1, 0, 0, "pci-exin3" },
	{ 10, 1, 0, 0, "pci-exin4" },
	{ 9, 1, 0, 0, "pci-exin5" },
	{ 30, 1, 0, 1, "pci-gnt1" },
	{ 23, 1, 0, 1, "pci-gnt2" },
	{ 19, 1, 0, 1, "pci-gnt3" },
	{ 38, 1, 0, 1, "pci-gnt4" },
	{ 29, 1, 0, 0, "pci-req1" },
	{ 31, 1, 0, 0, "pci-req2" },
	{ 3, 1, 0, 0, "pci-req3" },
	{ 37, 1, 0, 0, "pci-req4" },
	};

	__iomem void *ltq_pci_mapped_cfg;
	static __iomem void *ltq_pci_membase;

	int (ltqpci_plat_dev_init)(struct pci_dev dev) = NULL;

	/* Since the PCI REQ pins can be reused for other functionality, make it
	possible to exclude those from interpretation by the PCI controller */
	static int ltq_pci_req_mask = 0xf;

	static int *ltq_pci_irq_map;

	struct pci_ops ltq_pci_ops = {
	.read = ltq_pci_read_config_dword,
	.write = ltq_pci_write_config_dword
	};

	static struct resource pci_io_resource = {
	.name = "pci io space",
	.start = LTQ_PCI_IO_BASE,
	.end = LTQ_PCI_IO_BASE + LTQ_PCI_IO_SIZE - 1,
	.flags = IORESOURCE_IO
	};

	static struct resource pci_mem_resource = {
	.name = "pci memory space",
	.start = LTQ_PCI_MEM_BASE,
	.end = LTQ_PCI_MEM_BASE + LTQ_PCI_MEM_SIZE - 1,
	.flags = IORESOURCE_MEM
	};

	static struct pci_controller ltq_pci_controller = {
	.pci_ops = &ltq_pci_ops,
	.mem_resource = &pci_mem_resource,
	.mem_offset = 0x00000000UL,
	.io_resource = &pci_io_resource,
	.io_offset = 0x00000000UL,
	};

	int pcibios_plat_dev_init(struct pci_dev *dev)
	{
	if (ltqpci_plat_dev_init)
	return ltqpci_plat_dev_init(dev);

	return 0;
	}

	static u32 ltq_calc_bar11mask(void)
	{
	u32 mem, bar11mask;

	/* BAR11MASK value depends on available memory on system. */
	mem = num_physpages * PAGE_SIZE;
	bar11mask = (0x0ffffff0 & ~((1 << (fls(mem) - 1)) - 1)) \| 8;

	return bar11mask;
	}

	static void ltq_pci_setup_gpio(int gpio)
	{
	int i;
	for (i = 0; i < ARRAY_SIZE(ltq_pci_gpio_map); i++) {
	if (gpio & (1 << i)) {
	ltq_gpio_request(ltq_pci_gpio_map[i].pin,
	ltq_pci_gpio_map[i].alt0,
	ltq_pci_gpio_map[i].alt1,
	ltq_pci_gpio_map[i].dir,
	ltq_pci_gpio_map[i].name);
	}
	}
	ltq_gpio_request(21, 0, 0, 1, "pci-reset");
	ltq_pci_req_mask = (gpio >> PCI_REQ_SHIFT) & PCI_REQ_MASK;
	}

	static int __devinit ltq_pci_startup(struct ltq_pci_data *conf)
	{
	u32 temp_buffer;

	/* set clock to 33Mhz */
	ltq_cgu_w32(ltq_cgu_r32(LTQ_CGU_IFCCR) & ~0xf00000, LTQ_CGU_IFCCR);
	ltq_cgu_w32(ltq_cgu_r32(LTQ_CGU_IFCCR) \| 0x800000, LTQ_CGU_IFCCR);

	/* external or internal clock ? */
	if (conf->clock) {
	ltq_cgu_w32(ltq_cgu_r32(LTQ_CGU_IFCCR) & ~(1 << 16),
	LTQ_CGU_IFCCR);
	ltq_cgu_w32((1 << 30), LTQ_CGU_PCICR);
	} else {
	ltq_cgu_w32(ltq_cgu_r32(LTQ_CGU_IFCCR) \| (1 << 16),
	LTQ_CGU_IFCCR);
	ltq_cgu_w32((1 << 31) \| (1 << 30), LTQ_CGU_PCICR);
	}

	/* setup pci clock and gpis used by pci */
	ltq_pci_setup_gpio(conf->gpio);

	/* enable auto-switching between PCI and EBU */
	ltq_pci_w32(0xa, PCI_CR_CLK_CTRL);

	/* busy, i.e. configuration is not done, PCI access has to be retried */
	ltq_pci_w32(ltq_pci_r32(PCI_CR_PCI_MOD) & ~(1 << 24), PCI_CR_PCI_MOD);
	wmb();
	/* BUS Master/IO/MEM access */
	ltq_pci_cfg_w32(ltq_pci_cfg_r32(PCI_CS_STS_CMD) \| 7, PCI_CS_STS_CMD);

	/* enable external 2 PCI masters */
	temp_buffer = ltq_pci_r32(PCI_CR_PC_ARB);
	temp_buffer &= (~(ltq_pci_req_mask << 16));
	/* enable internal arbiter */
	temp_buffer \|= (1 << INTERNAL_ARB_ENABLE_BIT);
	/* enable internal PCI master reqest */
	temp_buffer &= (~(3 << PCI_MASTER0_REQ_MASK_2BITS));

	/* enable EBU request */
	temp_buffer &= (~(3 << PCI_MASTER1_REQ_MASK_2BITS));

	/* enable all external masters request */
	temp_buffer &= (~(3 << PCI_MASTER2_REQ_MASK_2BITS));
	ltq_pci_w32(temp_buffer, PCI_CR_PC_ARB);
	wmb();

	/* setup BAR memory regions */
	ltq_pci_w32(0x18000000, PCI_CR_FCI_ADDR_MAP0);
	ltq_pci_w32(0x18400000, PCI_CR_FCI_ADDR_MAP1);
	ltq_pci_w32(0x18800000, PCI_CR_FCI_ADDR_MAP2);
	ltq_pci_w32(0x18c00000, PCI_CR_FCI_ADDR_MAP3);
	ltq_pci_w32(0x19000000, PCI_CR_FCI_ADDR_MAP4);
	ltq_pci_w32(0x19400000, PCI_CR_FCI_ADDR_MAP5);
	ltq_pci_w32(0x19800000, PCI_CR_FCI_ADDR_MAP6);
	ltq_pci_w32(0x19c00000, PCI_CR_FCI_ADDR_MAP7);
	ltq_pci_w32(0x1ae00000, PCI_CR_FCI_ADDR_MAP11hg);
	ltq_pci_w32(ltq_calc_bar11mask(), PCI_CR_BAR11MASK);
	ltq_pci_w32(0, PCI_CR_PCI_ADDR_MAP11);
	ltq_pci_w32(0, PCI_CS_BASE_ADDR1);
	/* both TX and RX endian swap are enabled */
	ltq_pci_w32(ltq_pci_r32(PCI_CR_PCI_EOI) \| 3, PCI_CR_PCI_EOI);
	wmb();
	ltq_pci_w32(ltq_pci_r32(PCI_CR_BAR12MASK) \| 0x80000000,
	PCI_CR_BAR12MASK);
	ltq_pci_w32(ltq_pci_r32(PCI_CR_BAR13MASK) \| 0x80000000,
	PCI_CR_BAR13MASK);
	/use 8 dw burst length /
	ltq_pci_w32(0x303, PCI_CR_FCI_BURST_LENGTH);
	ltq_pci_w32(ltq_pci_r32(PCI_CR_PCI_MOD) \| (1 << 24), PCI_CR_PCI_MOD);
	wmb();

	/* setup irq line */
	ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_PCC_CON) \| 0xc, LTQ_EBU_PCC_CON);
	ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_PCC_IEN) \| 0x10, LTQ_EBU_PCC_IEN);

	/* toggle reset pin */
	__gpio_set_value(21, 0);
	wmb();
	mdelay(1);
	__gpio_set_value(21, 1);
	return 0;
	}

	int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
	{
	if (ltq_pci_irq_map[slot])
	return ltq_pci_irq_map[slot];
	printk(KERN_ERR "lq_pci: trying to map irq for unknown slot %d\n",
	slot);

	return 0;
	}

	static int __devinit ltq_pci_probe(struct platform_device *pdev)
	{
	struct ltq_pci_data *ltq_pci_data =
	(struct ltq_pci_data *) pdev->dev.platform_data;
	pci_probe_only = 0;
	ltq_pci_irq_map = ltq_pci_data->irq;
	ltq_pci_membase = ioremap_nocache(PCI_CR_BASE_ADDR, PCI_CR_SIZE);
	ltq_pci_mapped_cfg =
	ioremap_nocache(LTQ_PCI_CFG_BASE, LTQ_PCI_CFG_BASE);
	ltq_pci_controller.io_map_base =
	(unsigned long)ioremap(LTQ_PCI_IO_BASE, LTQ_PCI_IO_SIZE - 1);
	ltq_pci_startup(ltq_pci_data);
	register_pci_controller(&ltq_pci_controller);

	return 0;
	}

	static struct platform_driver
	ltq_pci_driver = {
	.probe = ltq_pci_probe,
	.driver = {
	.name = "ltq_pci",
	.owner = THIS_MODULE,
	},
	};

	int __init pcibios_init(void)
	{
	int ret = platform_driver_register(&ltq_pci_driver);
	if (ret)
	printk(KERN_INFO "ltq_pci: Error registering platfom driver!");
	return ret;
	}

	arch_initcall(pcibios_init);