arch/sh/drivers/pci/pci-sh7751.c - kernel/msm-4.9 - Gitiles

 /*
  *	Low-Level PCI Support for the SH7751
  *
  *  Dustin McIntire (dustin@sensoria.com)
  *	Derived from arch/i386/kernel/pci-*.c which bore the message:
  *	(c) 1999--2000 Martin Mares <mj@ucw.cz>
  *
  *  Ported to the new API by Paul Mundt <lethal@linux-sh.org>
  *  With cleanup by Paul van Gool <pvangool@mimotech.com>
  *
  *  May be copied or modified under the terms of the GNU General Public
  *  License.  See linux/COPYING for more information.
  *
  */

 #undef DEBUG

 #include <linux/config.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/pci.h>
 #include <linux/sched.h>
 #include <linux/ioport.h>
 #include <linux/errno.h>
 #include <linux/irq.h>
 #include <linux/delay.h>

 #include <asm/machvec.h>
 #include <asm/io.h>
 #include "pci-sh7751.h"

 static unsigned int pci_probe = PCI_PROBE_CONF1;
 extern int pci_fixup_pcic(void);

 void pcibios_fixup_irqs(void) __attribute__ ((weak));

 /*
  * Direct access to PCI hardware...
  */

 #define CONFIG_CMD(bus, devfn, where) (0x80000000 | (bus->number << 16) | (devfn << 8) | (where & ~3))

 /*
  * Functions for accessing PCI configuration space with type 1 accesses
  */
 static int sh7751_pci_read(struct pci_bus *bus, unsigned int devfn,
 			   int where, int size, u32 *val)
 {
 	unsigned long flags;
 	u32 data;

 	/*
 	 * PCIPDR may only be accessed as 32 bit words,
 	 * so we must do byte alignment by hand
 	 */
 	local_irq_save(flags);
 	outl(CONFIG_CMD(bus,devfn,where), PCI_REG(SH7751_PCIPAR));
 	data = inl(PCI_REG(SH7751_PCIPDR));
 	local_irq_restore(flags);

 	switch (size) {
 	case 1:
 		*val = (data >> ((where & 3) << 3)) & 0xff;
 		break;
 	case 2:
 		*val = (data >> ((where & 2) << 3)) & 0xffff;
 		break;
 	case 4:
 		*val = data;
 		break;
 	default:
 		return PCIBIOS_FUNC_NOT_SUPPORTED;
 	}

 	return PCIBIOS_SUCCESSFUL;
 }

 /*
  * Since SH7751 only does 32bit access we'll have to do a read,
  * mask,write operation.
  * We'll allow an odd byte offset, though it should be illegal.
  */
 static int sh7751_pci_write(struct pci_bus *bus, unsigned int devfn,
 			    int where, int size, u32 val)
 {
 	unsigned long flags;
 	int shift;
 	u32 data;

 	local_irq_save(flags);
 	outl(CONFIG_CMD(bus,devfn,where), PCI_REG(SH7751_PCIPAR));
 	data = inl(PCI_REG(SH7751_PCIPDR));
 	local_irq_restore(flags);

 	switch (size) {
 	case 1:
 		shift = (where & 3) << 3;
 		data &= ~(0xff << shift);
 		data |= ((val & 0xff) << shift);
 		break;
 	case 2:
 		shift = (where & 2) << 3;
 		data &= ~(0xffff << shift);
 		data |= ((val & 0xffff) << shift);
 		break;
 	case 4:
 		data = val;
 		break;
 	default:
 		return PCIBIOS_FUNC_NOT_SUPPORTED;
 	}

 	outl(data, PCI_REG(SH7751_PCIPDR));

 	return PCIBIOS_SUCCESSFUL;
 }

 #undef CONFIG_CMD

 struct pci_ops sh7751_pci_ops = {
 	.read 		= sh7751_pci_read,
 	.write		= sh7751_pci_write,
 };

 static int __init pci_check_direct(void)
 {
 	unsigned int tmp, id;

 	/* check for SH7751/SH7751R hardware */
 	id = inl(SH7751_PCIREG_BASE+SH7751_PCICONF0);
 	if (id != ((SH7751_DEVICE_ID << 16) | SH7751_VENDOR_ID) &&
 	    id != ((SH7751R_DEVICE_ID << 16) | SH7751_VENDOR_ID)) {
 		pr_debug("PCI: This is not an SH7751(R) (%x)\n", id);
 		return -ENODEV;
 	}

 	/*
 	 * Check if configuration works.
 	 */
 	if (pci_probe & PCI_PROBE_CONF1) {
 		tmp = inl (PCI_REG(SH7751_PCIPAR));
 		outl (0x80000000, PCI_REG(SH7751_PCIPAR));
 		if (inl (PCI_REG(SH7751_PCIPAR)) == 0x80000000) {
 			outl (tmp, PCI_REG(SH7751_PCIPAR));
 			printk(KERN_INFO "PCI: Using configuration type 1\n");
 			request_region(PCI_REG(SH7751_PCIPAR), 8, "PCI conf1");
 			return 0;
 		}
 		outl (tmp, PCI_REG(SH7751_PCIPAR));
 	}

 	pr_debug("PCI: pci_check_direct failed\n");
 	return -EINVAL;
 }

 /***************************************************************************************/

 /*
  *  Handle bus scanning and fixups ....
  */

 static void __init pci_fixup_ide_bases(struct pci_dev *d)
 {
 	int i;

 	/*
 	 * PCI IDE controllers use non-standard I/O port decoding, respect it.
 	 */
 	if ((d->class >> 8) != PCI_CLASS_STORAGE_IDE)
 		return;
 	pr_debug("PCI: IDE base address fixup for %s\n", pci_name(d));
 	for(i=0; i<4; i++) {
 		struct resource *r = &d->resource[i];
 		if ((r->start & ~0x80) == 0x374) {
 			r->start |= 2;
 			r->end = r->start;
 		}
 	}
 }

 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_ide_bases);

 /*
  *  Called after each bus is probed, but before its children
  *  are examined.
  */

 void __init pcibios_fixup_bus(struct pci_bus *b)
 {
 	pci_read_bridge_bases(b);
 }

 /*
  * Initialization. Try all known PCI access methods. Note that we support
  * using both PCI BIOS and direct access: in such cases, we use I/O ports
  * to access config space.
  *
  * Note that the platform specific initialization (BSC registers, and memory
  * space mapping) will be called via the machine vectors (sh_mv.mv_pci_init()) if it
  * exitst and via the platform defined function pcibios_init_platform().
  * See pci_bigsur.c for implementation;
  *
  * The BIOS version of the pci functions is not yet implemented but it is left
  * in for completeness.  Currently an error will be genereated at compile time.
  */

 static int __init sh7751_pci_init(void)
 {
 	int ret;

 	pr_debug("PCI: Starting intialization.\n");
 	if ((ret = pci_check_direct()) != 0)
 		return ret;

 	return pcibios_init_platform();
 }

 subsys_initcall(sh7751_pci_init);

 static int __init __area_sdram_check(unsigned int area)
 {
 	u32 word;

 	word = inl(SH7751_BCR1);
 	/* check BCR for SDRAM in area */
 	if(((word >> area) & 1) == 0) {
 		printk("PCI: Area %d is not configured for SDRAM. BCR1=0x%x\n",
 		       area, word);
 		return 0;
 	}
 	outl(word, PCI_REG(SH7751_PCIBCR1));

 	word = (u16)inw(SH7751_BCR2);
 	/* check BCR2 for 32bit SDRAM interface*/
 	if(((word >> (area << 1)) & 0x3) != 0x3) {
 		printk("PCI: Area %d is not 32 bit SDRAM. BCR2=0x%x\n",
 		       area, word);
 		return 0;
 	}
 	outl(word, PCI_REG(SH7751_PCIBCR2));

 	return 1;
 }

 int __init sh7751_pcic_init(struct sh7751_pci_address_map *map)
 {
 	u32 reg;
 	u32 word;

 	/* Set the BCR's to enable PCI access */
 	reg = inl(SH7751_BCR1);
 	reg |= 0x80000;
 	outl(reg, SH7751_BCR1);

 	/* Turn the clocks back on (not done in reset)*/
 	outl(0, PCI_REG(SH7751_PCICLKR));
 	/* Clear Powerdown IRQ's (not done in reset) */
 	word = SH7751_PCIPINT_D3 | SH7751_PCIPINT_D0;
 	outl(word, PCI_REG(SH7751_PCIPINT));

 	/*
 	 * This code is unused for some boards as it is done in the
 	 * bootloader and doing it here means the MAC addresses loaded
 	 * by the bootloader get lost.
 	 */
 	if (!(map->flags & SH7751_PCIC_NO_RESET)) {
 		/* toggle PCI reset pin */
 		word = SH7751_PCICR_PREFIX | SH7751_PCICR_PRST;
 		outl(word,PCI_REG(SH7751_PCICR));
 		/* Wait for a long time... not 1 sec. but long enough */
 		mdelay(100);
 		word = SH7751_PCICR_PREFIX;
 		outl(word,PCI_REG(SH7751_PCICR));
 	}

 	/* set the command/status bits to:
 	 * Wait Cycle Control + Parity Enable + Bus Master +
 	 * Mem space enable
 	 */
 	word = SH7751_PCICONF1_WCC | SH7751_PCICONF1_PER |
 	       SH7751_PCICONF1_BUM | SH7751_PCICONF1_MES;
 	outl(word, PCI_REG(SH7751_PCICONF1));

 	/* define this host as the host bridge */
 	word = SH7751_PCI_HOST_BRIDGE << 24;
 	outl(word, PCI_REG(SH7751_PCICONF2));

 	/* Set IO and Mem windows to local address
 	 * Make PCI and local address the same for easy 1 to 1 mapping
 	 * Window0 = map->window0.size @ non-cached area base = SDRAM
 	 * Window1 = map->window1.size @ cached area base = SDRAM
 	 */
 	word = map->window0.size - 1;
 	outl(word, PCI_REG(SH7751_PCILSR0));
 	word = map->window1.size - 1;
 	outl(word, PCI_REG(SH7751_PCILSR1));
 	/* Set the values on window 0 PCI config registers */
 	word = P2SEGADDR(map->window0.base);
 	outl(word, PCI_REG(SH7751_PCILAR0));
 	outl(word, PCI_REG(SH7751_PCICONF5));
 	/* Set the values on window 1 PCI config registers */
 	word =  PHYSADDR(map->window1.base);
 	outl(word, PCI_REG(SH7751_PCILAR1));
 	outl(word, PCI_REG(SH7751_PCICONF6));

 	/* Set the local 16MB PCI memory space window to
 	 * the lowest PCI mapped address
 	 */
 	word = PCIBIOS_MIN_MEM & SH7751_PCIMBR_MASK;
 	PCIDBG(2,"PCI: Setting upper bits of Memory window to 0x%x\n", word);
 	outl(word , PCI_REG(SH7751_PCIMBR));

 	/* Map IO space into PCI IO window
 	 * The IO window is 64K-PCIBIOS_MIN_IO in size
 	 * IO addresses will be translated to the
 	 * PCI IO window base address
 	 */
 	PCIDBG(3,"PCI: Mapping IO address 0x%x - 0x%x to base 0x%x\n", PCIBIOS_MIN_IO,
 	    (64*1024), SH7751_PCI_IO_BASE+PCIBIOS_MIN_IO);

 	/*
 	 * XXX: For now, leave this board-specific. In the event we have other
 	 * boards that need to do similar work, this can be wrapped.
 	 */
 #ifdef CONFIG_SH_BIGSUR
 	bigsur_port_map(PCIBIOS_MIN_IO, (64*1024), SH7751_PCI_IO_BASE+PCIBIOS_MIN_IO,0);
 #endif

 	/* Make sure the MSB's of IO window are set to access PCI space correctly */
 	word = PCIBIOS_MIN_IO & SH7751_PCIIOBR_MASK;
 	PCIDBG(2,"PCI: Setting upper bits of IO window to 0x%x\n", word);
 	outl(word, PCI_REG(SH7751_PCIIOBR));

 	/* Set PCI WCRx, BCRx's, copy from BSC locations */

 	/* check BCR for SDRAM in specified area */
 	switch (map->window0.base) {
 	case SH7751_CS0_BASE_ADDR: word = __area_sdram_check(0); break;
 	case SH7751_CS1_BASE_ADDR: word = __area_sdram_check(1); break;
 	case SH7751_CS2_BASE_ADDR: word = __area_sdram_check(2); break;
 	case SH7751_CS3_BASE_ADDR: word = __area_sdram_check(3); break;
 	case SH7751_CS4_BASE_ADDR: word = __area_sdram_check(4); break;
 	case SH7751_CS5_BASE_ADDR: word = __area_sdram_check(5); break;
 	case SH7751_CS6_BASE_ADDR: word = __area_sdram_check(6); break;
 	}

 	if (!word)
 		return 0;

 	/* configure the wait control registers */
 	word = inl(SH7751_WCR1);
 	outl(word, PCI_REG(SH7751_PCIWCR1));
 	word = inl(SH7751_WCR2);
 	outl(word, PCI_REG(SH7751_PCIWCR2));
 	word = inl(SH7751_WCR3);
 	outl(word, PCI_REG(SH7751_PCIWCR3));
 	word = inl(SH7751_MCR);
 	outl(word, PCI_REG(SH7751_PCIMCR));

 	/* NOTE: I'm ignoring the PCI error IRQs for now..
 	 * TODO: add support for the internal error interrupts and
 	 * DMA interrupts...
 	 */

 #ifdef CONFIG_SH_RTS7751R2D
 	pci_fixup_pcic();
 #endif

 	/* SH7751 init done, set central function init complete */
 	/* use round robin mode to stop a device starving/overruning */
 	word = SH7751_PCICR_PREFIX | SH7751_PCICR_CFIN | SH7751_PCICR_ARBM;
 	outl(word,PCI_REG(SH7751_PCICR));

 	return 1;
 }

 char * __init pcibios_setup(char *str)
 {
 	if (!strcmp(str, "off")) {
 		pci_probe = 0;
 		return NULL;
 	}

 	return str;
 }

 /*
  * 	IRQ functions
  */
 static u8 __init sh7751_no_swizzle(struct pci_dev *dev, u8 *pin)
 {
 	/* no swizzling */
 	return PCI_SLOT(dev->devfn);
 }

 static int sh7751_pci_lookup_irq(struct pci_dev *dev, u8 slot, u8 pin)
 {
 	int irq = -1;

 	/* now lookup the actual IRQ on a platform specific basis (pci-'platform'.c) */
 	irq = pcibios_map_platform_irq(slot,pin);
 	if( irq < 0 ) {
 		pr_debug("PCI: Error mapping IRQ on device %s\n", pci_name(dev));
 		return irq;
 	}

 	pr_debug("Setting IRQ for slot %s to %d\n", pci_name(dev), irq);

 	return irq;
 }

 void __init pcibios_fixup_irqs(void)
 {
 	pci_fixup_irqs(sh7751_no_swizzle, sh7751_pci_lookup_irq);
 }
	/*
	* Low-Level PCI Support for the SH7751
	*
	* Dustin McIntire (dustin@sensoria.com)
	* Derived from arch/i386/kernel/pci-*.c which bore the message:
	* (c) 1999--2000 Martin Mares <mj@ucw.cz>
	*
	* Ported to the new API by Paul Mundt <lethal@linux-sh.org>
	* With cleanup by Paul van Gool <pvangool@mimotech.com>
	*
	* May be copied or modified under the terms of the GNU General Public
	* License. See linux/COPYING for more information.
	*
	*/

	#undef DEBUG

	#include <linux/config.h>
	#include <linux/types.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/pci.h>
	#include <linux/sched.h>
	#include <linux/ioport.h>
	#include <linux/errno.h>
	#include <linux/irq.h>
	#include <linux/delay.h>

	#include <asm/machvec.h>
	#include <asm/io.h>
	#include "pci-sh7751.h"

	static unsigned int pci_probe = PCI_PROBE_CONF1;
	extern int pci_fixup_pcic(void);

	void pcibios_fixup_irqs(void) __attribute__ ((weak));

	/*
	* Direct access to PCI hardware...
	*/

	#define CONFIG_CMD(bus, devfn, where) (0x80000000 \| (bus->number << 16) \| (devfn << 8) \| (where & ~3))

	/*
	* Functions for accessing PCI configuration space with type 1 accesses
	*/
	static int sh7751_pci_read(struct pci_bus *bus, unsigned int devfn,
	int where, int size, u32 *val)
	{
	unsigned long flags;
	u32 data;

	/*
	* PCIPDR may only be accessed as 32 bit words,
	* so we must do byte alignment by hand
	*/
	local_irq_save(flags);
	outl(CONFIG_CMD(bus,devfn,where), PCI_REG(SH7751_PCIPAR));
	data = inl(PCI_REG(SH7751_PCIPDR));
	local_irq_restore(flags);

	switch (size) {
	case 1:
	*val = (data >> ((where & 3) << 3)) & 0xff;
	break;
	case 2:
	*val = (data >> ((where & 2) << 3)) & 0xffff;
	break;
	case 4:
	*val = data;
	break;
	default:
	return PCIBIOS_FUNC_NOT_SUPPORTED;
	}

	return PCIBIOS_SUCCESSFUL;
	}

	/*
	* Since SH7751 only does 32bit access we'll have to do a read,
	* mask,write operation.
	* We'll allow an odd byte offset, though it should be illegal.
	*/
	static int sh7751_pci_write(struct pci_bus *bus, unsigned int devfn,
	int where, int size, u32 val)
	{
	unsigned long flags;
	int shift;
	u32 data;

	local_irq_save(flags);
	outl(CONFIG_CMD(bus,devfn,where), PCI_REG(SH7751_PCIPAR));
	data = inl(PCI_REG(SH7751_PCIPDR));
	local_irq_restore(flags);

	switch (size) {
	case 1:
	shift = (where & 3) << 3;
	data &= ~(0xff << shift);
	data \|= ((val & 0xff) << shift);
	break;
	case 2:
	shift = (where & 2) << 3;
	data &= ~(0xffff << shift);
	data \|= ((val & 0xffff) << shift);
	break;
	case 4:
	data = val;
	break;
	default:
	return PCIBIOS_FUNC_NOT_SUPPORTED;
	}

	outl(data, PCI_REG(SH7751_PCIPDR));

	return PCIBIOS_SUCCESSFUL;
	}

	#undef CONFIG_CMD

	struct pci_ops sh7751_pci_ops = {
	.read = sh7751_pci_read,
	.write = sh7751_pci_write,
	};

	static int __init pci_check_direct(void)
	{
	unsigned int tmp, id;

	/* check for SH7751/SH7751R hardware */
	id = inl(SH7751_PCIREG_BASE+SH7751_PCICONF0);
	if (id != ((SH7751_DEVICE_ID << 16) \| SH7751_VENDOR_ID) &&
	id != ((SH7751R_DEVICE_ID << 16) \| SH7751_VENDOR_ID)) {
	pr_debug("PCI: This is not an SH7751(R) (%x)\n", id);
	return -ENODEV;
	}

	/*
	* Check if configuration works.
	*/
	if (pci_probe & PCI_PROBE_CONF1) {
	tmp = inl (PCI_REG(SH7751_PCIPAR));
	outl (0x80000000, PCI_REG(SH7751_PCIPAR));
	if (inl (PCI_REG(SH7751_PCIPAR)) == 0x80000000) {
	outl (tmp, PCI_REG(SH7751_PCIPAR));
	printk(KERN_INFO "PCI: Using configuration type 1\n");
	request_region(PCI_REG(SH7751_PCIPAR), 8, "PCI conf1");
	return 0;
	}
	outl (tmp, PCI_REG(SH7751_PCIPAR));
	}

	pr_debug("PCI: pci_check_direct failed\n");
	return -EINVAL;
	}

	/***************************************************************************************/

	/*
	* Handle bus scanning and fixups ....
	*/

	static void __init pci_fixup_ide_bases(struct pci_dev *d)
	{
	int i;

	/*
	* PCI IDE controllers use non-standard I/O port decoding, respect it.
	*/
	if ((d->class >> 8) != PCI_CLASS_STORAGE_IDE)
	return;
	pr_debug("PCI: IDE base address fixup for %s\n", pci_name(d));
	for(i=0; i<4; i++) {
	struct resource *r = &d->resource[i];
	if ((r->start & ~0x80) == 0x374) {
	r->start \|= 2;
	r->end = r->start;
	}
	}
	}

	DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_ide_bases);

	/*
	* Called after each bus is probed, but before its children
	* are examined.
	*/

	void __init pcibios_fixup_bus(struct pci_bus *b)
	{
	pci_read_bridge_bases(b);
	}

	/*
	* Initialization. Try all known PCI access methods. Note that we support
	* using both PCI BIOS and direct access: in such cases, we use I/O ports
	* to access config space.
	*
	* Note that the platform specific initialization (BSC registers, and memory
	* space mapping) will be called via the machine vectors (sh_mv.mv_pci_init()) if it
	* exitst and via the platform defined function pcibios_init_platform().
	* See pci_bigsur.c for implementation;
	*
	* The BIOS version of the pci functions is not yet implemented but it is left
	* in for completeness. Currently an error will be genereated at compile time.
	*/

	static int __init sh7751_pci_init(void)
	{
	int ret;

	pr_debug("PCI: Starting intialization.\n");
	if ((ret = pci_check_direct()) != 0)
	return ret;

	return pcibios_init_platform();
	}

	subsys_initcall(sh7751_pci_init);

	static int __init __area_sdram_check(unsigned int area)
	{
	u32 word;

	word = inl(SH7751_BCR1);
	/* check BCR for SDRAM in area */
	if(((word >> area) & 1) == 0) {
	printk("PCI: Area %d is not configured for SDRAM. BCR1=0x%x\n",
	area, word);
	return 0;
	}
	outl(word, PCI_REG(SH7751_PCIBCR1));

	word = (u16)inw(SH7751_BCR2);
	/* check BCR2 for 32bit SDRAM interface*/
	if(((word >> (area << 1)) & 0x3) != 0x3) {
	printk("PCI: Area %d is not 32 bit SDRAM. BCR2=0x%x\n",
	area, word);
	return 0;
	}
	outl(word, PCI_REG(SH7751_PCIBCR2));

	return 1;
	}

	int __init sh7751_pcic_init(struct sh7751_pci_address_map *map)
	{
	u32 reg;
	u32 word;

	/* Set the BCR's to enable PCI access */
	reg = inl(SH7751_BCR1);
	reg \|= 0x80000;
	outl(reg, SH7751_BCR1);

	/* Turn the clocks back on (not done in reset)*/
	outl(0, PCI_REG(SH7751_PCICLKR));
	/* Clear Powerdown IRQ's (not done in reset) */
	word = SH7751_PCIPINT_D3 \| SH7751_PCIPINT_D0;
	outl(word, PCI_REG(SH7751_PCIPINT));

	/*
	* This code is unused for some boards as it is done in the
	* bootloader and doing it here means the MAC addresses loaded
	* by the bootloader get lost.
	*/
	if (!(map->flags & SH7751_PCIC_NO_RESET)) {
	/* toggle PCI reset pin */
	word = SH7751_PCICR_PREFIX \| SH7751_PCICR_PRST;
	outl(word,PCI_REG(SH7751_PCICR));
	/* Wait for a long time... not 1 sec. but long enough */
	mdelay(100);
	word = SH7751_PCICR_PREFIX;
	outl(word,PCI_REG(SH7751_PCICR));
	}

	/* set the command/status bits to:
	* Wait Cycle Control + Parity Enable + Bus Master +
	* Mem space enable
	*/
	word = SH7751_PCICONF1_WCC \| SH7751_PCICONF1_PER \|
	SH7751_PCICONF1_BUM \| SH7751_PCICONF1_MES;
	outl(word, PCI_REG(SH7751_PCICONF1));

	/* define this host as the host bridge */
	word = SH7751_PCI_HOST_BRIDGE << 24;
	outl(word, PCI_REG(SH7751_PCICONF2));

	/* Set IO and Mem windows to local address
	* Make PCI and local address the same for easy 1 to 1 mapping
	* Window0 = map->window0.size @ non-cached area base = SDRAM
	* Window1 = map->window1.size @ cached area base = SDRAM
	*/
	word = map->window0.size - 1;
	outl(word, PCI_REG(SH7751_PCILSR0));
	word = map->window1.size - 1;
	outl(word, PCI_REG(SH7751_PCILSR1));
	/* Set the values on window 0 PCI config registers */
	word = P2SEGADDR(map->window0.base);
	outl(word, PCI_REG(SH7751_PCILAR0));
	outl(word, PCI_REG(SH7751_PCICONF5));
	/* Set the values on window 1 PCI config registers */
	word = PHYSADDR(map->window1.base);
	outl(word, PCI_REG(SH7751_PCILAR1));
	outl(word, PCI_REG(SH7751_PCICONF6));

	/* Set the local 16MB PCI memory space window to
	* the lowest PCI mapped address
	*/
	word = PCIBIOS_MIN_MEM & SH7751_PCIMBR_MASK;
	PCIDBG(2,"PCI: Setting upper bits of Memory window to 0x%x\n", word);
	outl(word , PCI_REG(SH7751_PCIMBR));

	/* Map IO space into PCI IO window
	* The IO window is 64K-PCIBIOS_MIN_IO in size
	* IO addresses will be translated to the
	* PCI IO window base address
	*/
	PCIDBG(3,"PCI: Mapping IO address 0x%x - 0x%x to base 0x%x\n", PCIBIOS_MIN_IO,
	(64*1024), SH7751_PCI_IO_BASE+PCIBIOS_MIN_IO);

	/*
	* XXX: For now, leave this board-specific. In the event we have other
	* boards that need to do similar work, this can be wrapped.
	*/
	#ifdef CONFIG_SH_BIGSUR
	bigsur_port_map(PCIBIOS_MIN_IO, (64*1024), SH7751_PCI_IO_BASE+PCIBIOS_MIN_IO,0);
	#endif

	/* Make sure the MSB's of IO window are set to access PCI space correctly */
	word = PCIBIOS_MIN_IO & SH7751_PCIIOBR_MASK;
	PCIDBG(2,"PCI: Setting upper bits of IO window to 0x%x\n", word);
	outl(word, PCI_REG(SH7751_PCIIOBR));

	/* Set PCI WCRx, BCRx's, copy from BSC locations */

	/* check BCR for SDRAM in specified area */
	switch (map->window0.base) {
	case SH7751_CS0_BASE_ADDR: word = __area_sdram_check(0); break;
	case SH7751_CS1_BASE_ADDR: word = __area_sdram_check(1); break;
	case SH7751_CS2_BASE_ADDR: word = __area_sdram_check(2); break;
	case SH7751_CS3_BASE_ADDR: word = __area_sdram_check(3); break;
	case SH7751_CS4_BASE_ADDR: word = __area_sdram_check(4); break;
	case SH7751_CS5_BASE_ADDR: word = __area_sdram_check(5); break;
	case SH7751_CS6_BASE_ADDR: word = __area_sdram_check(6); break;
	}

	if (!word)
	return 0;

	/* configure the wait control registers */
	word = inl(SH7751_WCR1);
	outl(word, PCI_REG(SH7751_PCIWCR1));
	word = inl(SH7751_WCR2);
	outl(word, PCI_REG(SH7751_PCIWCR2));
	word = inl(SH7751_WCR3);
	outl(word, PCI_REG(SH7751_PCIWCR3));
	word = inl(SH7751_MCR);
	outl(word, PCI_REG(SH7751_PCIMCR));

	/* NOTE: I'm ignoring the PCI error IRQs for now..
	* TODO: add support for the internal error interrupts and
	* DMA interrupts...
	*/

	#ifdef CONFIG_SH_RTS7751R2D
	pci_fixup_pcic();
	#endif

	/* SH7751 init done, set central function init complete */
	/* use round robin mode to stop a device starving/overruning */
	word = SH7751_PCICR_PREFIX \| SH7751_PCICR_CFIN \| SH7751_PCICR_ARBM;
	outl(word,PCI_REG(SH7751_PCICR));

	return 1;
	}

	char * __init pcibios_setup(char *str)
	{
	if (!strcmp(str, "off")) {
	pci_probe = 0;
	return NULL;
	}

	return str;
	}

	/*
	* IRQ functions
	*/
	static u8 __init sh7751_no_swizzle(struct pci_dev dev, u8 pin)
	{
	/* no swizzling */
	return PCI_SLOT(dev->devfn);
	}

	static int sh7751_pci_lookup_irq(struct pci_dev *dev, u8 slot, u8 pin)
	{
	int irq = -1;

	/* now lookup the actual IRQ on a platform specific basis (pci-'platform'.c) */
	irq = pcibios_map_platform_irq(slot,pin);
	if( irq < 0 ) {
	pr_debug("PCI: Error mapping IRQ on device %s\n", pci_name(dev));
	return irq;
	}

	pr_debug("Setting IRQ for slot %s to %d\n", pci_name(dev), irq);

	return irq;
	}

	void __init pcibios_fixup_irqs(void)
	{
	pci_fixup_irqs(sh7751_no_swizzle, sh7751_pci_lookup_irq);
	}