arch/mips/txx9/generic/pci.c - kernel/msm-4.19 - Gitiles

 /*
  * linux/arch/mips/txx9/pci.c
  *
  * Based on linux/arch/mips/txx9/rbtx4927/setup.c,
  *          linux/arch/mips/txx9/rbtx4938/setup.c,
  *	    and RBTX49xx patch from CELF patch archive.
  *
  * Copyright 2001-2005 MontaVista Software Inc.
  * Copyright (C) 1996, 97, 2001, 04  Ralf Baechle (ralf@linux-mips.org)
  * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
  *
  * 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
  * for more details.
  */
 #include <linux/delay.h>
 #include <linux/jiffies.h>
 #include <linux/io.h>
 #include <asm/txx9/generic.h>
 #include <asm/txx9/pci.h>
 #ifdef CONFIG_TOSHIBA_FPCIB0
 #include <linux/interrupt.h>
 #include <asm/i8259.h>
 #include <asm/txx9/smsc_fdc37m81x.h>
 #endif

 static int __init
 early_read_config_word(struct pci_controller *hose,
 		       int top_bus, int bus, int devfn, int offset, u16 *value)
 {
 	struct pci_dev fake_dev;
 	struct pci_bus fake_bus;

 	fake_dev.bus = &fake_bus;
 	fake_dev.sysdata = hose;
 	fake_dev.devfn = devfn;
 	fake_bus.number = bus;
 	fake_bus.sysdata = hose;
 	fake_bus.ops = hose->pci_ops;

 	if (bus != top_bus)
 		/* Fake a parent bus structure. */
 		fake_bus.parent = &fake_bus;
 	else
 		fake_bus.parent = NULL;

 	return pci_read_config_word(&fake_dev, offset, value);
 }

 int __init txx9_pci66_check(struct pci_controller *hose, int top_bus,
 			    int current_bus)
 {
 	u32 pci_devfn;
 	unsigned short vid;
 	int cap66 = -1;
 	u16 stat;

 	/* It seems SLC90E66 needs some time after PCI reset... */
 	mdelay(80);

 	printk(KERN_INFO "PCI: Checking 66MHz capabilities...\n");

 	for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) {
 		if (PCI_FUNC(pci_devfn))
 			continue;
 		if (early_read_config_word(hose, top_bus, current_bus,
 					   pci_devfn, PCI_VENDOR_ID, &vid) !=
 		    PCIBIOS_SUCCESSFUL)
 			continue;
 		if (vid == 0xffff)
 			continue;

 		/* check 66MHz capability */
 		if (cap66 < 0)
 			cap66 = 1;
 		if (cap66) {
 			early_read_config_word(hose, top_bus, current_bus,
 					       pci_devfn, PCI_STATUS, &stat);
 			if (!(stat & PCI_STATUS_66MHZ)) {
 				printk(KERN_DEBUG
 				       "PCI: %02x:%02x not 66MHz capable.\n",
 				       current_bus, pci_devfn);
 				cap66 = 0;
 				break;
 			}
 		}
 	}
 	return cap66 > 0;
 }

 static struct resource primary_pci_mem_res[2] = {
 	{ .name = "PCI MEM" },
 	{ .name = "PCI MMIO" },
 };
 static struct resource primary_pci_io_res = { .name = "PCI IO" };
 struct pci_controller txx9_primary_pcic = {
 	.mem_resource = &primary_pci_mem_res[0],
 	.io_resource = &primary_pci_io_res,
 };

 #ifdef CONFIG_64BIT
 int txx9_pci_mem_high __initdata = 1;
 #else
 int txx9_pci_mem_high __initdata;
 #endif

 /*
  * allocate pci_controller and resources.
  * mem_base, io_base: physical addresss.  0 for auto assignment.
  * mem_size and io_size means max size on auto assignment.
  * pcic must be &txx9_primary_pcic or NULL.
  */
 struct pci_controller *__init
 txx9_alloc_pci_controller(struct pci_controller *pcic,
 			  unsigned long mem_base, unsigned long mem_size,
 			  unsigned long io_base, unsigned long io_size)
 {
 	struct pcic {
 		struct pci_controller c;
 		struct resource r_mem[2];
 		struct resource r_io;
 	} *new = NULL;
 	int min_size = 0x10000;

 	if (!pcic) {
 		new = kzalloc(sizeof(*new), GFP_KERNEL);
 		if (!new)
 			return NULL;
 		new->r_mem[0].name = "PCI mem";
 		new->r_mem[1].name = "PCI mmio";
 		new->r_io.name = "PCI io";
 		new->c.mem_resource = new->r_mem;
 		new->c.io_resource = &new->r_io;
 		pcic = &new->c;
 	} else
 		BUG_ON(pcic != &txx9_primary_pcic);
 	pcic->io_resource->flags = IORESOURCE_IO;

 	/*
 	 * for auto assignment, first search a (big) region for PCI
 	 * MEM, then search a region for PCI IO.
 	 */
 	if (mem_base) {
 		pcic->mem_resource[0].start = mem_base;
 		pcic->mem_resource[0].end = mem_base + mem_size - 1;
 		if (request_resource(&iomem_resource, &pcic->mem_resource[0]))
 			goto free_and_exit;
 	} else {
 		unsigned long min = 0, max = 0x20000000; /* low 512MB */
 		if (!mem_size) {
 			/* default size for auto assignment */
 			if (txx9_pci_mem_high)
 				mem_size = 0x20000000;	/* mem:512M(max) */
 			else
 				mem_size = 0x08000000;	/* mem:128M(max) */
 		}
 		if (txx9_pci_mem_high) {
 			min = 0x20000000;
 			max = 0xe0000000;
 		}
 		/* search free region for PCI MEM */
 		for (; mem_size >= min_size; mem_size /= 2) {
 			if (allocate_resource(&iomem_resource,
 					      &pcic->mem_resource[0],
 					      mem_size, min, max,
 					      mem_size, NULL, NULL) == 0)
 				break;
 		}
 		if (mem_size < min_size)
 			goto free_and_exit;
 	}

 	pcic->mem_resource[1].flags = IORESOURCE_MEM | IORESOURCE_BUSY;
 	if (io_base) {
 		pcic->mem_resource[1].start = io_base;
 		pcic->mem_resource[1].end = io_base + io_size - 1;
 		if (request_resource(&iomem_resource, &pcic->mem_resource[1]))
 			goto release_and_exit;
 	} else {
 		if (!io_size)
 			/* default size for auto assignment */
 			io_size = 0x01000000;	/* io:16M(max) */
 		/* search free region for PCI IO in low 512MB */
 		for (; io_size >= min_size; io_size /= 2) {
 			if (allocate_resource(&iomem_resource,
 					      &pcic->mem_resource[1],
 					      io_size, 0, 0x20000000,
 					      io_size, NULL, NULL) == 0)
 				break;
 		}
 		if (io_size < min_size)
 			goto release_and_exit;
 		io_base = pcic->mem_resource[1].start;
 	}

 	pcic->mem_resource[0].flags = IORESOURCE_MEM;
 	if (pcic == &txx9_primary_pcic &&
 	    mips_io_port_base == (unsigned long)-1) {
 		/* map ioport 0 to PCI I/O space address 0 */
 		set_io_port_base(IO_BASE + pcic->mem_resource[1].start);
 		pcic->io_resource->start = 0;
 		pcic->io_offset = 0;	/* busaddr == ioaddr */
 		pcic->io_map_base = IO_BASE + pcic->mem_resource[1].start;
 	} else {
 		/* physaddr to ioaddr */
 		pcic->io_resource->start =
 			io_base - (mips_io_port_base - IO_BASE);
 		pcic->io_offset = io_base - (mips_io_port_base - IO_BASE);
 		pcic->io_map_base = mips_io_port_base;
 	}
 	pcic->io_resource->end = pcic->io_resource->start + io_size - 1;

 	pcic->mem_offset = 0;	/* busaddr == physaddr */

 	printk(KERN_INFO "PCI: IO 0x%08llx-0x%08llx MEM 0x%08llx-0x%08llx\n",
 	       (unsigned long long)pcic->mem_resource[1].start,
 	       (unsigned long long)pcic->mem_resource[1].end,
 	       (unsigned long long)pcic->mem_resource[0].start,
 	       (unsigned long long)pcic->mem_resource[0].end);

 	/* register_pci_controller() will request MEM resource */
 	release_resource(&pcic->mem_resource[0]);
 	return pcic;
  release_and_exit:
 	release_resource(&pcic->mem_resource[0]);
  free_and_exit:
 	kfree(new);
 	printk(KERN_ERR "PCI: Failed to allocate resources.\n");
 	return NULL;
 }

 static int __init
 txx9_arch_pci_init(void)
 {
 	PCIBIOS_MIN_IO = 0x8000;	/* reseve legacy I/O space */
 	return 0;
 }
 arch_initcall(txx9_arch_pci_init);

 /* IRQ/IDSEL mapping */
 int txx9_pci_option =
 #ifdef CONFIG_PICMG_PCI_BACKPLANE_DEFAULT
 	TXX9_PCI_OPT_PICMG |
 #endif
 	TXX9_PCI_OPT_CLK_AUTO;

 enum txx9_pci_err_action txx9_pci_err_action = TXX9_PCI_ERR_REPORT;

 #ifdef CONFIG_TOSHIBA_FPCIB0
 static irqreturn_t i8259_interrupt(int irq, void *dev_id)
 {
 	int isairq;

 	isairq = i8259_irq();
 	if (unlikely(isairq <= I8259A_IRQ_BASE))
 		return IRQ_NONE;
 	generic_handle_irq(isairq);
 	return IRQ_HANDLED;
 }

 static int __init
 txx9_i8259_irq_setup(int irq)
 {
 	int err;

 	init_i8259_irqs();
 	err = request_irq(irq, &i8259_interrupt, IRQF_DISABLED|IRQF_SHARED,
 			  "cascade(i8259)", (void *)(long)irq);
 	if (!err)
 		printk(KERN_INFO "PCI-ISA bridge PIC (irq %d)\n", irq);
 	return err;
 }

 static void __init quirk_slc90e66_bridge(struct pci_dev *dev)
 {
 	int irq;	/* PCI/ISA Bridge interrupt */
 	u8 reg_64;
 	u32 reg_b0;
 	u8 reg_e1;
 	irq = pcibios_map_irq(dev, PCI_SLOT(dev->devfn), 1); /* INTA */
 	if (!irq)
 		return;
 	txx9_i8259_irq_setup(irq);
 	pci_read_config_byte(dev, 0x64, &reg_64);
 	pci_read_config_dword(dev, 0xb0, &reg_b0);
 	pci_read_config_byte(dev, 0xe1, &reg_e1);
 	/* serial irq control */
 	reg_64 = 0xd0;
 	/* serial irq pin */
 	reg_b0 |= 0x00010000;
 	/* ide irq on isa14 */
 	reg_e1 &= 0xf0;
 	reg_e1 |= 0x0d;
 	pci_write_config_byte(dev, 0x64, reg_64);
 	pci_write_config_dword(dev, 0xb0, reg_b0);
 	pci_write_config_byte(dev, 0xe1, reg_e1);

 	smsc_fdc37m81x_init(0x3f0);
 	smsc_fdc37m81x_config_beg();
 	smsc_fdc37m81x_config_set(SMSC_FDC37M81X_DNUM,
 				  SMSC_FDC37M81X_KBD);
 	smsc_fdc37m81x_config_set(SMSC_FDC37M81X_INT, 1);
 	smsc_fdc37m81x_config_set(SMSC_FDC37M81X_INT2, 12);
 	smsc_fdc37m81x_config_set(SMSC_FDC37M81X_ACTIVE,
 				  1);
 	smsc_fdc37m81x_config_end();
 }

 static void quirk_slc90e66_ide(struct pci_dev *dev)
 {
 	unsigned char dat;
 	int regs[2] = {0x41, 0x43};
 	int i;

 	/* SMSC SLC90E66 IDE uses irq 14, 15 (default) */
 	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 14);
 	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &dat);
 	printk(KERN_INFO "PCI: %s: IRQ %02x", pci_name(dev), dat);
 	/* enable SMSC SLC90E66 IDE */
 	for (i = 0; i < ARRAY_SIZE(regs); i++) {
 		pci_read_config_byte(dev, regs[i], &dat);
 		pci_write_config_byte(dev, regs[i], dat | 0x80);
 		pci_read_config_byte(dev, regs[i], &dat);
 		printk(KERN_CONT " IDETIM%d %02x", i, dat);
 	}
 	pci_read_config_byte(dev, 0x5c, &dat);
 	/*
 	 * !!! DO NOT REMOVE THIS COMMENT IT IS REQUIRED BY SMSC !!!
 	 *
 	 * This line of code is intended to provide the user with a work
 	 * around solution to the anomalies cited in SMSC's anomaly sheet
 	 * entitled, "SLC90E66 Functional Rev.J_0.1 Anomalies"".
 	 *
 	 * !!! DO NOT REMOVE THIS COMMENT IT IS REQUIRED BY SMSC !!!
 	 */
 	dat |= 0x01;
 	pci_write_config_byte(dev, regs[i], dat);
 	pci_read_config_byte(dev, 0x5c, &dat);
 	printk(KERN_CONT " REG5C %02x", dat);
 	printk(KERN_CONT "\n");
 }
 #endif /* CONFIG_TOSHIBA_FPCIB0 */

 static void final_fixup(struct pci_dev *dev)
 {
 	unsigned char bist;

 	/* Do build-in self test */
 	if (pci_read_config_byte(dev, PCI_BIST, &bist) == PCIBIOS_SUCCESSFUL &&
 	    (bist & PCI_BIST_CAPABLE)) {
 		unsigned long timeout;
 		pci_set_power_state(dev, PCI_D0);
 		printk(KERN_INFO "PCI: %s BIST...", pci_name(dev));
 		pci_write_config_byte(dev, PCI_BIST, PCI_BIST_START);
 		timeout = jiffies + HZ * 2;	/* timeout after 2 sec */
 		do {
 			pci_read_config_byte(dev, PCI_BIST, &bist);
 			if (time_after(jiffies, timeout))
 				break;
 		} while (bist & PCI_BIST_START);
 		if (bist & (PCI_BIST_CODE_MASK | PCI_BIST_START))
 			printk(KERN_CONT "failed. (0x%x)\n", bist);
 		else
 			printk(KERN_CONT "OK.\n");
 	}
 }

 #ifdef CONFIG_TOSHIBA_FPCIB0
 #define PCI_DEVICE_ID_EFAR_SLC90E66_0 0x9460
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_0,
 	quirk_slc90e66_bridge);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1,
 	quirk_slc90e66_ide);
 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1,
 	quirk_slc90e66_ide);
 #endif
 DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, final_fixup);
 DECLARE_PCI_FIXUP_RESUME(PCI_ANY_ID, PCI_ANY_ID, final_fixup);

 int pcibios_plat_dev_init(struct pci_dev *dev)
 {
 	return 0;
 }

 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 {
 	return txx9_board_vec->pci_map_irq(dev, slot, pin);
 }
	/*
	* linux/arch/mips/txx9/pci.c
	*
	* Based on linux/arch/mips/txx9/rbtx4927/setup.c,
	* linux/arch/mips/txx9/rbtx4938/setup.c,
	* and RBTX49xx patch from CELF patch archive.
	*
	* Copyright 2001-2005 MontaVista Software Inc.
	* Copyright (C) 1996, 97, 2001, 04 Ralf Baechle (ralf@linux-mips.org)
	* (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
	*
	* 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
	* for more details.
	*/
	#include <linux/delay.h>
	#include <linux/jiffies.h>
	#include <linux/io.h>
	#include <asm/txx9/generic.h>
	#include <asm/txx9/pci.h>
	#ifdef CONFIG_TOSHIBA_FPCIB0
	#include <linux/interrupt.h>
	#include <asm/i8259.h>
	#include <asm/txx9/smsc_fdc37m81x.h>
	#endif

	static int __init
	early_read_config_word(struct pci_controller *hose,
	int top_bus, int bus, int devfn, int offset, u16 *value)
	{
	struct pci_dev fake_dev;
	struct pci_bus fake_bus;

	fake_dev.bus = &fake_bus;
	fake_dev.sysdata = hose;
	fake_dev.devfn = devfn;
	fake_bus.number = bus;
	fake_bus.sysdata = hose;
	fake_bus.ops = hose->pci_ops;

	if (bus != top_bus)
	/* Fake a parent bus structure. */
	fake_bus.parent = &fake_bus;
	else
	fake_bus.parent = NULL;

	return pci_read_config_word(&fake_dev, offset, value);
	}

	int __init txx9_pci66_check(struct pci_controller *hose, int top_bus,
	int current_bus)
	{
	u32 pci_devfn;
	unsigned short vid;
	int cap66 = -1;
	u16 stat;

	/* It seems SLC90E66 needs some time after PCI reset... */
	mdelay(80);

	printk(KERN_INFO "PCI: Checking 66MHz capabilities...\n");

	for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) {
	if (PCI_FUNC(pci_devfn))
	continue;
	if (early_read_config_word(hose, top_bus, current_bus,
	pci_devfn, PCI_VENDOR_ID, &vid) !=
	PCIBIOS_SUCCESSFUL)
	continue;
	if (vid == 0xffff)
	continue;

	/* check 66MHz capability */
	if (cap66 < 0)
	cap66 = 1;
	if (cap66) {
	early_read_config_word(hose, top_bus, current_bus,
	pci_devfn, PCI_STATUS, &stat);
	if (!(stat & PCI_STATUS_66MHZ)) {
	printk(KERN_DEBUG
	"PCI: %02x:%02x not 66MHz capable.\n",
	current_bus, pci_devfn);
	cap66 = 0;
	break;
	}
	}
	}
	return cap66 > 0;
	}

	static struct resource primary_pci_mem_res[2] = {
	{ .name = "PCI MEM" },
	{ .name = "PCI MMIO" },
	};
	static struct resource primary_pci_io_res = { .name = "PCI IO" };
	struct pci_controller txx9_primary_pcic = {
	.mem_resource = &primary_pci_mem_res[0],
	.io_resource = &primary_pci_io_res,
	};

	#ifdef CONFIG_64BIT
	int txx9_pci_mem_high __initdata = 1;
	#else
	int txx9_pci_mem_high __initdata;
	#endif

	/*
	* allocate pci_controller and resources.
	* mem_base, io_base: physical addresss. 0 for auto assignment.
	* mem_size and io_size means max size on auto assignment.
	* pcic must be &txx9_primary_pcic or NULL.
	*/
	struct pci_controller *__init
	txx9_alloc_pci_controller(struct pci_controller *pcic,
	unsigned long mem_base, unsigned long mem_size,
	unsigned long io_base, unsigned long io_size)
	{
	struct pcic {
	struct pci_controller c;
	struct resource r_mem[2];
	struct resource r_io;
	} *new = NULL;
	int min_size = 0x10000;

	if (!pcic) {
	new = kzalloc(sizeof(*new), GFP_KERNEL);
	if (!new)
	return NULL;
	new->r_mem[0].name = "PCI mem";
	new->r_mem[1].name = "PCI mmio";
	new->r_io.name = "PCI io";
	new->c.mem_resource = new->r_mem;
	new->c.io_resource = &new->r_io;
	pcic = &new->c;
	} else
	BUG_ON(pcic != &txx9_primary_pcic);
	pcic->io_resource->flags = IORESOURCE_IO;

	/*
	* for auto assignment, first search a (big) region for PCI
	* MEM, then search a region for PCI IO.
	*/
	if (mem_base) {
	pcic->mem_resource[0].start = mem_base;
	pcic->mem_resource[0].end = mem_base + mem_size - 1;
	if (request_resource(&iomem_resource, &pcic->mem_resource[0]))
	goto free_and_exit;
	} else {
	unsigned long min = 0, max = 0x20000000; /* low 512MB */
	if (!mem_size) {
	/* default size for auto assignment */
	if (txx9_pci_mem_high)
	mem_size = 0x20000000; /* mem:512M(max) */
	else
	mem_size = 0x08000000; /* mem:128M(max) */
	}
	if (txx9_pci_mem_high) {
	min = 0x20000000;
	max = 0xe0000000;
	}
	/* search free region for PCI MEM */
	for (; mem_size >= min_size; mem_size /= 2) {
	if (allocate_resource(&iomem_resource,
	&pcic->mem_resource[0],
	mem_size, min, max,
	mem_size, NULL, NULL) == 0)
	break;
	}
	if (mem_size < min_size)
	goto free_and_exit;
	}

	pcic->mem_resource[1].flags = IORESOURCE_MEM \| IORESOURCE_BUSY;
	if (io_base) {
	pcic->mem_resource[1].start = io_base;
	pcic->mem_resource[1].end = io_base + io_size - 1;
	if (request_resource(&iomem_resource, &pcic->mem_resource[1]))
	goto release_and_exit;
	} else {
	if (!io_size)
	/* default size for auto assignment */
	io_size = 0x01000000; /* io:16M(max) */
	/* search free region for PCI IO in low 512MB */
	for (; io_size >= min_size; io_size /= 2) {
	if (allocate_resource(&iomem_resource,
	&pcic->mem_resource[1],
	io_size, 0, 0x20000000,
	io_size, NULL, NULL) == 0)
	break;
	}
	if (io_size < min_size)
	goto release_and_exit;
	io_base = pcic->mem_resource[1].start;
	}

	pcic->mem_resource[0].flags = IORESOURCE_MEM;
	if (pcic == &txx9_primary_pcic &&
	mips_io_port_base == (unsigned long)-1) {
	/* map ioport 0 to PCI I/O space address 0 */
	set_io_port_base(IO_BASE + pcic->mem_resource[1].start);
	pcic->io_resource->start = 0;
	pcic->io_offset = 0; /* busaddr == ioaddr */
	pcic->io_map_base = IO_BASE + pcic->mem_resource[1].start;
	} else {
	/* physaddr to ioaddr */
	pcic->io_resource->start =
	io_base - (mips_io_port_base - IO_BASE);
	pcic->io_offset = io_base - (mips_io_port_base - IO_BASE);
	pcic->io_map_base = mips_io_port_base;
	}
	pcic->io_resource->end = pcic->io_resource->start + io_size - 1;

	pcic->mem_offset = 0; /* busaddr == physaddr */

	printk(KERN_INFO "PCI: IO 0x%08llx-0x%08llx MEM 0x%08llx-0x%08llx\n",
	(unsigned long long)pcic->mem_resource[1].start,
	(unsigned long long)pcic->mem_resource[1].end,
	(unsigned long long)pcic->mem_resource[0].start,
	(unsigned long long)pcic->mem_resource[0].end);

	/* register_pci_controller() will request MEM resource */
	release_resource(&pcic->mem_resource[0]);
	return pcic;
	release_and_exit:
	release_resource(&pcic->mem_resource[0]);
	free_and_exit:
	kfree(new);
	printk(KERN_ERR "PCI: Failed to allocate resources.\n");
	return NULL;
	}

	static int __init
	txx9_arch_pci_init(void)
	{
	PCIBIOS_MIN_IO = 0x8000; /* reseve legacy I/O space */
	return 0;
	}
	arch_initcall(txx9_arch_pci_init);

	/* IRQ/IDSEL mapping */
	int txx9_pci_option =
	#ifdef CONFIG_PICMG_PCI_BACKPLANE_DEFAULT
	TXX9_PCI_OPT_PICMG \|
	#endif
	TXX9_PCI_OPT_CLK_AUTO;

	enum txx9_pci_err_action txx9_pci_err_action = TXX9_PCI_ERR_REPORT;

	#ifdef CONFIG_TOSHIBA_FPCIB0
	static irqreturn_t i8259_interrupt(int irq, void *dev_id)
	{
	int isairq;

	isairq = i8259_irq();
	if (unlikely(isairq <= I8259A_IRQ_BASE))
	return IRQ_NONE;
	generic_handle_irq(isairq);
	return IRQ_HANDLED;
	}

	static int __init
	txx9_i8259_irq_setup(int irq)
	{
	int err;

	init_i8259_irqs();
	err = request_irq(irq, &i8259_interrupt, IRQF_DISABLED\|IRQF_SHARED,
	"cascade(i8259)", (void *)(long)irq);
	if (!err)
	printk(KERN_INFO "PCI-ISA bridge PIC (irq %d)\n", irq);
	return err;
	}

	static void __init quirk_slc90e66_bridge(struct pci_dev *dev)
	{
	int irq; /* PCI/ISA Bridge interrupt */
	u8 reg_64;
	u32 reg_b0;
	u8 reg_e1;
	irq = pcibios_map_irq(dev, PCI_SLOT(dev->devfn), 1); /* INTA */
	if (!irq)
	return;
	txx9_i8259_irq_setup(irq);
	pci_read_config_byte(dev, 0x64, &reg_64);
	pci_read_config_dword(dev, 0xb0, &reg_b0);
	pci_read_config_byte(dev, 0xe1, &reg_e1);
	/* serial irq control */
	reg_64 = 0xd0;
	/* serial irq pin */
	reg_b0 \|= 0x00010000;
	/* ide irq on isa14 */
	reg_e1 &= 0xf0;
	reg_e1 \|= 0x0d;
	pci_write_config_byte(dev, 0x64, reg_64);
	pci_write_config_dword(dev, 0xb0, reg_b0);
	pci_write_config_byte(dev, 0xe1, reg_e1);

	smsc_fdc37m81x_init(0x3f0);
	smsc_fdc37m81x_config_beg();
	smsc_fdc37m81x_config_set(SMSC_FDC37M81X_DNUM,
	SMSC_FDC37M81X_KBD);
	smsc_fdc37m81x_config_set(SMSC_FDC37M81X_INT, 1);
	smsc_fdc37m81x_config_set(SMSC_FDC37M81X_INT2, 12);
	smsc_fdc37m81x_config_set(SMSC_FDC37M81X_ACTIVE,
	1);
	smsc_fdc37m81x_config_end();
	}

	static void quirk_slc90e66_ide(struct pci_dev *dev)
	{
	unsigned char dat;
	int regs[2] = {0x41, 0x43};
	int i;

	/* SMSC SLC90E66 IDE uses irq 14, 15 (default) */
	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 14);
	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &dat);
	printk(KERN_INFO "PCI: %s: IRQ %02x", pci_name(dev), dat);
	/* enable SMSC SLC90E66 IDE */
	for (i = 0; i < ARRAY_SIZE(regs); i++) {
	pci_read_config_byte(dev, regs[i], &dat);
	pci_write_config_byte(dev, regs[i], dat \| 0x80);
	pci_read_config_byte(dev, regs[i], &dat);
	printk(KERN_CONT " IDETIM%d %02x", i, dat);
	}
	pci_read_config_byte(dev, 0x5c, &dat);
	/*
	* !!! DO NOT REMOVE THIS COMMENT IT IS REQUIRED BY SMSC !!!
	*
	* This line of code is intended to provide the user with a work
	* around solution to the anomalies cited in SMSC's anomaly sheet
	* entitled, "SLC90E66 Functional Rev.J_0.1 Anomalies"".
	*
	* !!! DO NOT REMOVE THIS COMMENT IT IS REQUIRED BY SMSC !!!
	*/
	dat \|= 0x01;
	pci_write_config_byte(dev, regs[i], dat);
	pci_read_config_byte(dev, 0x5c, &dat);
	printk(KERN_CONT " REG5C %02x", dat);
	printk(KERN_CONT "\n");
	}
	#endif /* CONFIG_TOSHIBA_FPCIB0 */

	static void final_fixup(struct pci_dev *dev)
	{
	unsigned char bist;

	/* Do build-in self test */
	if (pci_read_config_byte(dev, PCI_BIST, &bist) == PCIBIOS_SUCCESSFUL &&
	(bist & PCI_BIST_CAPABLE)) {
	unsigned long timeout;
	pci_set_power_state(dev, PCI_D0);
	printk(KERN_INFO "PCI: %s BIST...", pci_name(dev));
	pci_write_config_byte(dev, PCI_BIST, PCI_BIST_START);
	timeout = jiffies + HZ * 2; /* timeout after 2 sec */
	do {
	pci_read_config_byte(dev, PCI_BIST, &bist);
	if (time_after(jiffies, timeout))
	break;
	} while (bist & PCI_BIST_START);
	if (bist & (PCI_BIST_CODE_MASK \| PCI_BIST_START))
	printk(KERN_CONT "failed. (0x%x)\n", bist);
	else
	printk(KERN_CONT "OK.\n");
	}
	}

	#ifdef CONFIG_TOSHIBA_FPCIB0
	#define PCI_DEVICE_ID_EFAR_SLC90E66_0 0x9460
	DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_0,
	quirk_slc90e66_bridge);
	DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1,
	quirk_slc90e66_ide);
	DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1,
	quirk_slc90e66_ide);
	#endif
	DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, final_fixup);
	DECLARE_PCI_FIXUP_RESUME(PCI_ANY_ID, PCI_ANY_ID, final_fixup);

	int pcibios_plat_dev_init(struct pci_dev *dev)
	{
	return 0;
	}

	int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
	{
	return txx9_board_vec->pci_map_irq(dev, slot, pin);
	}