arch/powerpc/platforms/cell/celleb_scc_epci.c - linux - Git at Google

 /*
  * Support for SCC external PCI
  *
  * (C) Copyright 2004-2007 TOSHIBA CORPORATION
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License along
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */

 #undef DEBUG

 #include <linux/kernel.h>
 #include <linux/threads.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/pci_regs.h>
 #include <linux/bootmem.h>

 #include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/prom.h>
 #include <asm/pci-bridge.h>
 #include <asm/ppc-pci.h>

 #include "celleb_scc.h"
 #include "celleb_pci.h"

 #define MAX_PCI_DEVICES   32
 #define MAX_PCI_FUNCTIONS  8

 #define iob()  __asm__ __volatile__("eieio; sync":::"memory")

 static inline PCI_IO_ADDR celleb_epci_get_epci_base(
 					struct pci_controller *hose)
 {
 	/*
 	 * Note:
 	 * Celleb epci uses cfg_addr as a base address for
 	 * epci control registers.
 	 */

 	return hose->cfg_addr;
 }

 static inline PCI_IO_ADDR celleb_epci_get_epci_cfg(
 					struct pci_controller *hose)
 {
 	/*
 	 * Note:
 	 * Celleb epci uses cfg_data as a base address for
 	 * configuration area for epci devices.
 	 */

 	return hose->cfg_data;
 }

 static inline void clear_and_disable_master_abort_interrupt(
 					struct pci_controller *hose)
 {
 	PCI_IO_ADDR epci_base;
 	PCI_IO_ADDR reg;
 	epci_base = celleb_epci_get_epci_base(hose);
 	reg = epci_base + PCI_COMMAND;
 	out_be32(reg, in_be32(reg) | (PCI_STATUS_REC_MASTER_ABORT << 16));
 }

 static int celleb_epci_check_abort(struct pci_controller *hose,
 				   PCI_IO_ADDR addr)
 {
 	PCI_IO_ADDR reg;
 	PCI_IO_ADDR epci_base;
 	u32 val;

 	iob();
 	epci_base = celleb_epci_get_epci_base(hose);

 	reg = epci_base + PCI_COMMAND;
 	val = in_be32(reg);

 	if (val & (PCI_STATUS_REC_MASTER_ABORT << 16)) {
 		out_be32(reg,
 			 (val & 0xffff) | (PCI_STATUS_REC_MASTER_ABORT << 16));

 		/* clear PCI Controller error, FRE, PMFE */
 		reg = epci_base + SCC_EPCI_STATUS;
 		out_be32(reg, SCC_EPCI_INT_PAI);

 		reg = epci_base + SCC_EPCI_VCSR;
 		val = in_be32(reg) & 0xffff;
 		val |= SCC_EPCI_VCSR_FRE;
 		out_be32(reg, val);

 		reg = epci_base + SCC_EPCI_VISTAT;
 		out_be32(reg, SCC_EPCI_VISTAT_PMFE);
 		return PCIBIOS_DEVICE_NOT_FOUND;
 	}

 	return PCIBIOS_SUCCESSFUL;
 }

 static PCI_IO_ADDR celleb_epci_make_config_addr(struct pci_bus *bus,
 		struct pci_controller *hose, unsigned int devfn, int where)
 {
 	PCI_IO_ADDR addr;

 	if (bus != hose->bus)
 		addr = celleb_epci_get_epci_cfg(hose) +
 		       (((bus->number & 0xff) << 16)
 			| ((devfn & 0xff) << 8)
 			| (where & 0xff)
 			| 0x01000000);
 	else
 		addr = celleb_epci_get_epci_cfg(hose) +
 		       (((devfn & 0xff) << 8) | (where & 0xff));

 	pr_debug("EPCI: config_addr = 0x%p\n", addr);

 	return addr;
 }

 static int celleb_epci_read_config(struct pci_bus *bus,
 			unsigned int devfn, int where, int size, u32 *val)
 {
 	PCI_IO_ADDR epci_base;
 	PCI_IO_ADDR addr;
 	struct device_node *node;
 	struct pci_controller *hose;

 	/* allignment check */
 	BUG_ON(where % size);

 	node = (struct device_node *)bus->sysdata;
 	hose = pci_find_hose_for_OF_device(node);

 	if (!celleb_epci_get_epci_cfg(hose))
 		return PCIBIOS_DEVICE_NOT_FOUND;

 	if (bus->number == hose->first_busno && devfn == 0) {
 		/* EPCI controller self */

 		epci_base = celleb_epci_get_epci_base(hose);
 		addr = epci_base + where;

 		switch (size) {
 		case 1:
 			*val = in_8(addr);
 			break;
 		case 2:
 			*val = in_be16(addr);
 			break;
 		case 4:
 			*val = in_be32(addr);
 			break;
 		default:
 			return PCIBIOS_DEVICE_NOT_FOUND;
 		}

 	} else {

 		clear_and_disable_master_abort_interrupt(hose);
 		addr = celleb_epci_make_config_addr(bus, hose, devfn, where);

 		switch (size) {
 		case 1:
 			*val = in_8(addr);
 			break;
 		case 2:
 			*val = in_le16(addr);
 			break;
 		case 4:
 			*val = in_le32(addr);
 			break;
 		default:
 			return PCIBIOS_DEVICE_NOT_FOUND;
 		}
 	}

 	pr_debug("EPCI: "
 		 "addr=0x%p, devfn=0x%x, where=0x%x, size=0x%x, val=0x%x\n",
 		 addr, devfn, where, size, *val);

 	return celleb_epci_check_abort(hose, NULL);
 }

 static int celleb_epci_write_config(struct pci_bus *bus,
 			unsigned int devfn, int where, int size, u32 val)
 {
 	PCI_IO_ADDR epci_base;
 	PCI_IO_ADDR addr;
 	struct device_node *node;
 	struct pci_controller *hose;

 	/* allignment check */
 	BUG_ON(where % size);

 	node = (struct device_node *)bus->sysdata;
 	hose = pci_find_hose_for_OF_device(node);


 	if (!celleb_epci_get_epci_cfg(hose))
 		return PCIBIOS_DEVICE_NOT_FOUND;

 	if (bus->number == hose->first_busno && devfn == 0) {
 		/* EPCI controller self */

 		epci_base = celleb_epci_get_epci_base(hose);
 		addr = epci_base + where;

 		switch (size) {
 		case 1:
 			out_8(addr, val);
 			break;
 		case 2:
 			out_be16(addr, val);
 			break;
 		case 4:
 			out_be32(addr, val);
 			break;
 		default:
 			return PCIBIOS_DEVICE_NOT_FOUND;
 		}

 	} else {

 		clear_and_disable_master_abort_interrupt(hose);
 		addr = celleb_epci_make_config_addr(bus, hose, devfn, where);

 		switch (size) {
 		case 1:
 			out_8(addr, val);
 			break;
 		case 2:
 			out_le16(addr, val);
 			break;
 		case 4:
 			out_le32(addr, val);
 			break;
 		default:
 			return PCIBIOS_DEVICE_NOT_FOUND;
 		}
 	}

 	return celleb_epci_check_abort(hose, addr);
 }

 struct pci_ops celleb_epci_ops = {
 	.read = celleb_epci_read_config,
 	.write = celleb_epci_write_config,
 };

 /* to be moved in FW */
 static int __init celleb_epci_init(struct pci_controller *hose)
 {
 	u32 val;
 	PCI_IO_ADDR reg;
 	PCI_IO_ADDR epci_base;
 	int hwres = 0;

 	epci_base = celleb_epci_get_epci_base(hose);

 	/* PCI core reset(Internal bus and PCI clock) */
 	reg = epci_base + SCC_EPCI_CKCTRL;
 	val = in_be32(reg);
 	if (val == 0x00030101)
 		hwres = 1;
 	else {
 		val &= ~(SCC_EPCI_CKCTRL_CRST0 | SCC_EPCI_CKCTRL_CRST1);
 		out_be32(reg, val);

 		/* set PCI core clock */
 		val = in_be32(reg);
 		val |= (SCC_EPCI_CKCTRL_OCLKEN | SCC_EPCI_CKCTRL_LCLKEN);
 		out_be32(reg, val);

 		/* release PCI core reset (internal bus) */
 		val = in_be32(reg);
 		val |= SCC_EPCI_CKCTRL_CRST0;
 		out_be32(reg, val);

 		/* set PCI clock select */
 		reg = epci_base + SCC_EPCI_CLKRST;
 		val = in_be32(reg);
 		val &= ~SCC_EPCI_CLKRST_CKS_MASK;
 		val |= SCC_EPCI_CLKRST_CKS_2;
 		out_be32(reg, val);

 		/* set arbiter */
 		reg = epci_base + SCC_EPCI_ABTSET;
 		out_be32(reg, 0x0f1f001f);	/* temporary value */

 		/* buffer on */
 		reg = epci_base + SCC_EPCI_CLKRST;
 		val = in_be32(reg);
 		val |= SCC_EPCI_CLKRST_BC;
 		out_be32(reg, val);

 		/* PCI clock enable */
 		val = in_be32(reg);
 		val |= SCC_EPCI_CLKRST_PCKEN;
 		out_be32(reg, val);

 		/* release PCI core reset (all) */
 		reg = epci_base + SCC_EPCI_CKCTRL;
 		val = in_be32(reg);
 		val |= (SCC_EPCI_CKCTRL_CRST0 | SCC_EPCI_CKCTRL_CRST1);
 		out_be32(reg, val);

 		/* set base translation registers. (already set by Beat) */

 		/* set base address masks. (already set by Beat) */
 	}

 	/* release interrupt masks and clear all interrupts */
 	reg = epci_base + SCC_EPCI_INTSET;
 	out_be32(reg, 0x013f011f);	/* all interrupts enable */
 	reg = epci_base + SCC_EPCI_VIENAB;
 	val = SCC_EPCI_VIENAB_PMPEE | SCC_EPCI_VIENAB_PMFEE;
 	out_be32(reg, val);
 	reg = epci_base + SCC_EPCI_STATUS;
 	out_be32(reg, 0xffffffff);
 	reg = epci_base + SCC_EPCI_VISTAT;
 	out_be32(reg, 0xffffffff);

 	/* disable PCI->IB address translation */
 	reg = epci_base + SCC_EPCI_VCSR;
 	val = in_be32(reg);
 	val &= ~(SCC_EPCI_VCSR_DR | SCC_EPCI_VCSR_AT);
 	out_be32(reg, val);

 	/* set base addresses. (no need to set?) */

 	/* memory space, bus master enable */
 	reg = epci_base + PCI_COMMAND;
 	val = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
 	out_be32(reg, val);

 	/* endian mode setup */
 	reg = epci_base + SCC_EPCI_ECMODE;
 	val = 0x00550155;
 	out_be32(reg, val);

 	/* set control option */
 	reg = epci_base + SCC_EPCI_CNTOPT;
 	val = in_be32(reg);
 	val |= SCC_EPCI_CNTOPT_O2PMB;
 	out_be32(reg, val);

 	/* XXX: temporay: set registers for address conversion setup */
 	reg = epci_base + SCC_EPCI_CNF10_REG;
 	out_be32(reg, 0x80000008);
 	reg = epci_base + SCC_EPCI_CNF14_REG;
 	out_be32(reg, 0x40000008);

 	reg = epci_base + SCC_EPCI_BAM0;
 	out_be32(reg, 0x80000000);
 	reg = epci_base + SCC_EPCI_BAM1;
 	out_be32(reg, 0xe0000000);

 	reg = epci_base + SCC_EPCI_PVBAT;
 	out_be32(reg, 0x80000000);

 	if (!hwres) {
 		/* release external PCI reset */
 		reg = epci_base + SCC_EPCI_CLKRST;
 		val = in_be32(reg);
 		val |= SCC_EPCI_CLKRST_PCIRST;
 		out_be32(reg, val);
 	}

 	return 0;
 }

 static int __init celleb_setup_epci(struct device_node *node,
 				    struct pci_controller *hose)
 {
 	struct resource r;

 	pr_debug("PCI: celleb_setup_epci()\n");

 	/*
 	 * Note:
 	 * Celleb epci uses cfg_addr and cfg_data member of
 	 * pci_controller structure in irregular way.
 	 *
 	 * cfg_addr is used to map for control registers of
 	 * celleb epci.
 	 *
 	 * cfg_data is used for configuration area of devices
 	 * on Celleb epci buses.
 	 */

 	if (of_address_to_resource(node, 0, &r))
 		goto error;
 	hose->cfg_addr = ioremap(r.start, (r.end - r.start + 1));
 	if (!hose->cfg_addr)
 		goto error;
 	pr_debug("EPCI: cfg_addr map 0x%016llx->0x%016lx + 0x%016llx\n",
 		 r.start, (unsigned long)hose->cfg_addr, (r.end - r.start + 1));

 	if (of_address_to_resource(node, 2, &r))
 		goto error;
 	hose->cfg_data = ioremap(r.start, (r.end - r.start + 1));
 	if (!hose->cfg_data)
 		goto error;
 	pr_debug("EPCI: cfg_data map 0x%016llx->0x%016lx + 0x%016llx\n",
 		 r.start, (unsigned long)hose->cfg_data, (r.end - r.start + 1));

 	hose->ops = &celleb_epci_ops;
 	celleb_epci_init(hose);

 	return 0;

 error:
 	if (hose->cfg_addr)
 		iounmap(hose->cfg_addr);

 	if (hose->cfg_data)
 		iounmap(hose->cfg_data);
 	return 1;
 }

 struct celleb_phb_spec celleb_epci_spec __initdata = {
 	.setup = celleb_setup_epci,
 	.ops = &spiderpci_ops,
 	.iowa_init = &spiderpci_iowa_init,
 	.iowa_data = (void *)0,
 };
	/*
	* Support for SCC external PCI
	*
	* (C) Copyright 2004-2007 TOSHIBA CORPORATION
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	*/

	#undef DEBUG

	#include <linux/kernel.h>
	#include <linux/threads.h>
	#include <linux/pci.h>
	#include <linux/init.h>
	#include <linux/pci_regs.h>
	#include <linux/bootmem.h>

	#include <asm/io.h>
	#include <asm/irq.h>
	#include <asm/prom.h>
	#include <asm/pci-bridge.h>
	#include <asm/ppc-pci.h>

	#include "celleb_scc.h"
	#include "celleb_pci.h"

	#define MAX_PCI_DEVICES 32
	#define MAX_PCI_FUNCTIONS 8

	#define iob() __asm__ __volatile__("eieio; sync":::"memory")

	static inline PCI_IO_ADDR celleb_epci_get_epci_base(
	struct pci_controller *hose)
	{
	/*
	* Note:
	* Celleb epci uses cfg_addr as a base address for
	* epci control registers.
	*/

	return hose->cfg_addr;
	}

	static inline PCI_IO_ADDR celleb_epci_get_epci_cfg(
	struct pci_controller *hose)
	{
	/*
	* Note:
	* Celleb epci uses cfg_data as a base address for
	* configuration area for epci devices.
	*/

	return hose->cfg_data;
	}

	static inline void clear_and_disable_master_abort_interrupt(
	struct pci_controller *hose)
	{
	PCI_IO_ADDR epci_base;
	PCI_IO_ADDR reg;
	epci_base = celleb_epci_get_epci_base(hose);
	reg = epci_base + PCI_COMMAND;
	out_be32(reg, in_be32(reg) \| (PCI_STATUS_REC_MASTER_ABORT << 16));
	}

	static int celleb_epci_check_abort(struct pci_controller *hose,
	PCI_IO_ADDR addr)
	{
	PCI_IO_ADDR reg;
	PCI_IO_ADDR epci_base;
	u32 val;

	iob();
	epci_base = celleb_epci_get_epci_base(hose);

	reg = epci_base + PCI_COMMAND;
	val = in_be32(reg);

	if (val & (PCI_STATUS_REC_MASTER_ABORT << 16)) {
	out_be32(reg,
	(val & 0xffff) \| (PCI_STATUS_REC_MASTER_ABORT << 16));

	/* clear PCI Controller error, FRE, PMFE */
	reg = epci_base + SCC_EPCI_STATUS;
	out_be32(reg, SCC_EPCI_INT_PAI);

	reg = epci_base + SCC_EPCI_VCSR;
	val = in_be32(reg) & 0xffff;
	val \|= SCC_EPCI_VCSR_FRE;
	out_be32(reg, val);

	reg = epci_base + SCC_EPCI_VISTAT;
	out_be32(reg, SCC_EPCI_VISTAT_PMFE);
	return PCIBIOS_DEVICE_NOT_FOUND;
	}

	return PCIBIOS_SUCCESSFUL;
	}

	static PCI_IO_ADDR celleb_epci_make_config_addr(struct pci_bus *bus,
	struct pci_controller *hose, unsigned int devfn, int where)
	{
	PCI_IO_ADDR addr;

	if (bus != hose->bus)
	addr = celleb_epci_get_epci_cfg(hose) +
	(((bus->number & 0xff) << 16)
	\| ((devfn & 0xff) << 8)
	\| (where & 0xff)
	\| 0x01000000);
	else
	addr = celleb_epci_get_epci_cfg(hose) +
	(((devfn & 0xff) << 8) \| (where & 0xff));

	pr_debug("EPCI: config_addr = 0x%p\n", addr);

	return addr;
	}

	static int celleb_epci_read_config(struct pci_bus *bus,
	unsigned int devfn, int where, int size, u32 *val)
	{
	PCI_IO_ADDR epci_base;
	PCI_IO_ADDR addr;
	struct device_node *node;
	struct pci_controller *hose;

	/* allignment check */
	BUG_ON(where % size);

	node = (struct device_node *)bus->sysdata;
	hose = pci_find_hose_for_OF_device(node);

	if (!celleb_epci_get_epci_cfg(hose))
	return PCIBIOS_DEVICE_NOT_FOUND;

	if (bus->number == hose->first_busno && devfn == 0) {
	/* EPCI controller self */

	epci_base = celleb_epci_get_epci_base(hose);
	addr = epci_base + where;

	switch (size) {
	case 1:
	*val = in_8(addr);
	break;
	case 2:
	*val = in_be16(addr);
	break;
	case 4:
	*val = in_be32(addr);
	break;
	default:
	return PCIBIOS_DEVICE_NOT_FOUND;
	}

	} else {

	clear_and_disable_master_abort_interrupt(hose);
	addr = celleb_epci_make_config_addr(bus, hose, devfn, where);

	switch (size) {
	case 1:
	*val = in_8(addr);
	break;
	case 2:
	*val = in_le16(addr);
	break;
	case 4:
	*val = in_le32(addr);
	break;
	default:
	return PCIBIOS_DEVICE_NOT_FOUND;
	}
	}

	pr_debug("EPCI: "
	"addr=0x%p, devfn=0x%x, where=0x%x, size=0x%x, val=0x%x\n",
	addr, devfn, where, size, *val);

	return celleb_epci_check_abort(hose, NULL);
	}

	static int celleb_epci_write_config(struct pci_bus *bus,
	unsigned int devfn, int where, int size, u32 val)
	{
	PCI_IO_ADDR epci_base;
	PCI_IO_ADDR addr;
	struct device_node *node;
	struct pci_controller *hose;

	/* allignment check */
	BUG_ON(where % size);

	node = (struct device_node *)bus->sysdata;
	hose = pci_find_hose_for_OF_device(node);


	if (!celleb_epci_get_epci_cfg(hose))
	return PCIBIOS_DEVICE_NOT_FOUND;

	if (bus->number == hose->first_busno && devfn == 0) {
	/* EPCI controller self */

	epci_base = celleb_epci_get_epci_base(hose);
	addr = epci_base + where;

	switch (size) {
	case 1:
	out_8(addr, val);
	break;
	case 2:
	out_be16(addr, val);
	break;
	case 4:
	out_be32(addr, val);
	break;
	default:
	return PCIBIOS_DEVICE_NOT_FOUND;
	}

	} else {

	clear_and_disable_master_abort_interrupt(hose);
	addr = celleb_epci_make_config_addr(bus, hose, devfn, where);

	switch (size) {
	case 1:
	out_8(addr, val);
	break;
	case 2:
	out_le16(addr, val);
	break;
	case 4:
	out_le32(addr, val);
	break;
	default:
	return PCIBIOS_DEVICE_NOT_FOUND;
	}
	}

	return celleb_epci_check_abort(hose, addr);
	}

	struct pci_ops celleb_epci_ops = {
	.read = celleb_epci_read_config,
	.write = celleb_epci_write_config,
	};

	/* to be moved in FW */
	static int __init celleb_epci_init(struct pci_controller *hose)
	{
	u32 val;
	PCI_IO_ADDR reg;
	PCI_IO_ADDR epci_base;
	int hwres = 0;

	epci_base = celleb_epci_get_epci_base(hose);

	/* PCI core reset(Internal bus and PCI clock) */
	reg = epci_base + SCC_EPCI_CKCTRL;
	val = in_be32(reg);
	if (val == 0x00030101)
	hwres = 1;
	else {
	val &= ~(SCC_EPCI_CKCTRL_CRST0 \| SCC_EPCI_CKCTRL_CRST1);
	out_be32(reg, val);

	/* set PCI core clock */
	val = in_be32(reg);
	val \|= (SCC_EPCI_CKCTRL_OCLKEN \| SCC_EPCI_CKCTRL_LCLKEN);
	out_be32(reg, val);

	/* release PCI core reset (internal bus) */
	val = in_be32(reg);
	val \|= SCC_EPCI_CKCTRL_CRST0;
	out_be32(reg, val);

	/* set PCI clock select */
	reg = epci_base + SCC_EPCI_CLKRST;
	val = in_be32(reg);
	val &= ~SCC_EPCI_CLKRST_CKS_MASK;
	val \|= SCC_EPCI_CLKRST_CKS_2;
	out_be32(reg, val);

	/* set arbiter */
	reg = epci_base + SCC_EPCI_ABTSET;
	out_be32(reg, 0x0f1f001f); /* temporary value */

	/* buffer on */
	reg = epci_base + SCC_EPCI_CLKRST;
	val = in_be32(reg);
	val \|= SCC_EPCI_CLKRST_BC;
	out_be32(reg, val);

	/* PCI clock enable */
	val = in_be32(reg);
	val \|= SCC_EPCI_CLKRST_PCKEN;
	out_be32(reg, val);

	/* release PCI core reset (all) */
	reg = epci_base + SCC_EPCI_CKCTRL;
	val = in_be32(reg);
	val \|= (SCC_EPCI_CKCTRL_CRST0 \| SCC_EPCI_CKCTRL_CRST1);
	out_be32(reg, val);

	/* set base translation registers. (already set by Beat) */

	/* set base address masks. (already set by Beat) */
	}

	/* release interrupt masks and clear all interrupts */
	reg = epci_base + SCC_EPCI_INTSET;
	out_be32(reg, 0x013f011f); /* all interrupts enable */
	reg = epci_base + SCC_EPCI_VIENAB;
	val = SCC_EPCI_VIENAB_PMPEE \| SCC_EPCI_VIENAB_PMFEE;
	out_be32(reg, val);
	reg = epci_base + SCC_EPCI_STATUS;
	out_be32(reg, 0xffffffff);
	reg = epci_base + SCC_EPCI_VISTAT;
	out_be32(reg, 0xffffffff);

	/* disable PCI->IB address translation */
	reg = epci_base + SCC_EPCI_VCSR;
	val = in_be32(reg);
	val &= ~(SCC_EPCI_VCSR_DR \| SCC_EPCI_VCSR_AT);
	out_be32(reg, val);

	/* set base addresses. (no need to set?) */

	/* memory space, bus master enable */
	reg = epci_base + PCI_COMMAND;
	val = PCI_COMMAND_MEMORY \| PCI_COMMAND_MASTER;
	out_be32(reg, val);

	/* endian mode setup */
	reg = epci_base + SCC_EPCI_ECMODE;
	val = 0x00550155;
	out_be32(reg, val);

	/* set control option */
	reg = epci_base + SCC_EPCI_CNTOPT;
	val = in_be32(reg);
	val \|= SCC_EPCI_CNTOPT_O2PMB;
	out_be32(reg, val);

	/* XXX: temporay: set registers for address conversion setup */
	reg = epci_base + SCC_EPCI_CNF10_REG;
	out_be32(reg, 0x80000008);
	reg = epci_base + SCC_EPCI_CNF14_REG;
	out_be32(reg, 0x40000008);

	reg = epci_base + SCC_EPCI_BAM0;
	out_be32(reg, 0x80000000);
	reg = epci_base + SCC_EPCI_BAM1;
	out_be32(reg, 0xe0000000);

	reg = epci_base + SCC_EPCI_PVBAT;
	out_be32(reg, 0x80000000);

	if (!hwres) {
	/* release external PCI reset */
	reg = epci_base + SCC_EPCI_CLKRST;
	val = in_be32(reg);
	val \|= SCC_EPCI_CLKRST_PCIRST;
	out_be32(reg, val);
	}

	return 0;
	}

	static int __init celleb_setup_epci(struct device_node *node,
	struct pci_controller *hose)
	{
	struct resource r;

	pr_debug("PCI: celleb_setup_epci()\n");

	/*
	* Note:
	* Celleb epci uses cfg_addr and cfg_data member of
	* pci_controller structure in irregular way.
	*
	* cfg_addr is used to map for control registers of
	* celleb epci.
	*
	* cfg_data is used for configuration area of devices
	* on Celleb epci buses.
	*/

	if (of_address_to_resource(node, 0, &r))
	goto error;
	hose->cfg_addr = ioremap(r.start, (r.end - r.start + 1));
	if (!hose->cfg_addr)
	goto error;
	pr_debug("EPCI: cfg_addr map 0x%016llx->0x%016lx + 0x%016llx\n",
	r.start, (unsigned long)hose->cfg_addr, (r.end - r.start + 1));

	if (of_address_to_resource(node, 2, &r))
	goto error;
	hose->cfg_data = ioremap(r.start, (r.end - r.start + 1));
	if (!hose->cfg_data)
	goto error;
	pr_debug("EPCI: cfg_data map 0x%016llx->0x%016lx + 0x%016llx\n",
	r.start, (unsigned long)hose->cfg_data, (r.end - r.start + 1));

	hose->ops = &celleb_epci_ops;
	celleb_epci_init(hose);

	return 0;

	error:
	if (hose->cfg_addr)
	iounmap(hose->cfg_addr);

	if (hose->cfg_data)
	iounmap(hose->cfg_data);
	return 1;
	}

	struct celleb_phb_spec celleb_epci_spec __initdata = {
	.setup = celleb_setup_epci,
	.ops = &spiderpci_ops,
	.iowa_init = &spiderpci_iowa_init,
	.iowa_data = (void *)0,
	};