/*
 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Andreas Heppel <aheppel@sysgo.de>
 *
 * (C) Copyright 2002
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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
 * aloong with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#ifndef _PCI_H
#define _PCI_H

/*
 * Under PCI, each device has 256 bytes of configuration address space,
 * of which the first 64 bytes are standardized as follows:
 */
#define PCI_VENDOR_ID		0x00	/* 16 bits */
#define PCI_DEVICE_ID		0x02	/* 16 bits */
#define PCI_COMMAND		0x04	/* 16 bits */
#define  PCI_COMMAND_IO		0x1	/* Enable response in I/O space */
#define  PCI_COMMAND_MEMORY	0x2	/* Enable response in Memory space */
#define  PCI_COMMAND_MASTER	0x4	/* Enable bus mastering */
#define  PCI_COMMAND_SPECIAL	0x8	/* Enable response to special cycles */
#define  PCI_COMMAND_INVALIDATE 0x10	/* Use memory write and invalidate */
#define  PCI_COMMAND_VGA_PALETTE 0x20	/* Enable palette snooping */
#define  PCI_COMMAND_PARITY	0x40	/* Enable parity checking */
#define  PCI_COMMAND_WAIT	0x80	/* Enable address/data stepping */
#define  PCI_COMMAND_SERR	0x100	/* Enable SERR */
#define  PCI_COMMAND_FAST_BACK	0x200	/* Enable back-to-back writes */

#define PCI_STATUS		0x06	/* 16 bits */
#define  PCI_STATUS_CAP_LIST	0x10	/* Support Capability List */
#define  PCI_STATUS_66MHZ	0x20	/* Support 66 Mhz PCI 2.1 bus */
#define  PCI_STATUS_UDF		0x40	/* Support User Definable Features [obsolete] */
#define  PCI_STATUS_FAST_BACK	0x80	/* Accept fast-back to back */
#define  PCI_STATUS_PARITY	0x100	/* Detected parity error */
#define  PCI_STATUS_DEVSEL_MASK 0x600	/* DEVSEL timing */
#define  PCI_STATUS_DEVSEL_FAST 0x000
#define  PCI_STATUS_DEVSEL_MEDIUM 0x200
#define  PCI_STATUS_DEVSEL_SLOW 0x400
#define  PCI_STATUS_SIG_TARGET_ABORT 0x800 /* Set on target abort */
#define  PCI_STATUS_REC_TARGET_ABORT 0x1000 /* Master ack of " */
#define  PCI_STATUS_REC_MASTER_ABORT 0x2000 /* Set on master abort */
#define  PCI_STATUS_SIG_SYSTEM_ERROR 0x4000 /* Set when we drive SERR */
#define  PCI_STATUS_DETECTED_PARITY 0x8000 /* Set on parity error */

#define PCI_CLASS_REVISION	0x08	/* High 24 bits are class, low 8
					   revision */
#define PCI_REVISION_ID		0x08	/* Revision ID */
#define PCI_CLASS_PROG		0x09	/* Reg. Level Programming Interface */
#define PCI_CLASS_DEVICE	0x0a	/* Device class */
#define PCI_CLASS_CODE		0x0b	/* Device class code */
#define PCI_CLASS_SUB_CODE	0x0a	/* Device sub-class code */

#define PCI_CACHE_LINE_SIZE	0x0c	/* 8 bits */
#define PCI_LATENCY_TIMER	0x0d	/* 8 bits */
#define PCI_HEADER_TYPE		0x0e	/* 8 bits */
#define  PCI_HEADER_TYPE_NORMAL 0
#define  PCI_HEADER_TYPE_BRIDGE 1
#define  PCI_HEADER_TYPE_CARDBUS 2

#define PCI_BIST		0x0f	/* 8 bits */
#define PCI_BIST_CODE_MASK	0x0f	/* Return result */
#define PCI_BIST_START		0x40	/* 1 to start BIST, 2 secs or less */
#define PCI_BIST_CAPABLE	0x80	/* 1 if BIST capable */

/*
 * Base addresses specify locations in memory or I/O space.
 * Decoded size can be determined by writing a value of
 * 0xffffffff to the register, and reading it back.  Only
 * 1 bits are decoded.
 */
#define PCI_BASE_ADDRESS_0	0x10	/* 32 bits */
#define PCI_BASE_ADDRESS_1	0x14	/* 32 bits [htype 0,1 only] */
#define PCI_BASE_ADDRESS_2	0x18	/* 32 bits [htype 0 only] */
#define PCI_BASE_ADDRESS_3	0x1c	/* 32 bits */
#define PCI_BASE_ADDRESS_4	0x20	/* 32 bits */
#define PCI_BASE_ADDRESS_5	0x24	/* 32 bits */
#define  PCI_BASE_ADDRESS_SPACE 0x01	/* 0 = memory, 1 = I/O */
#define  PCI_BASE_ADDRESS_SPACE_IO 0x01
#define  PCI_BASE_ADDRESS_SPACE_MEMORY 0x00
#define  PCI_BASE_ADDRESS_MEM_TYPE_MASK 0x06
#define  PCI_BASE_ADDRESS_MEM_TYPE_32	0x00	/* 32 bit address */
#define  PCI_BASE_ADDRESS_MEM_TYPE_1M	0x02	/* Below 1M [obsolete] */
#define  PCI_BASE_ADDRESS_MEM_TYPE_64	0x04	/* 64 bit address */
#define  PCI_BASE_ADDRESS_MEM_PREFETCH	0x08	/* prefetchable? */
#define  PCI_BASE_ADDRESS_MEM_MASK	(~0x0fUL)
#define  PCI_BASE_ADDRESS_IO_MASK	(~0x03UL)
/* bit 1 is reserved if address_space = 1 */

/* Header type 0 (normal devices) */
#define PCI_CARDBUS_CIS		0x28
#define PCI_SUBSYSTEM_VENDOR_ID 0x2c
#define PCI_SUBSYSTEM_ID	0x2e
#define PCI_ROM_ADDRESS		0x30	/* Bits 31..11 are address, 10..1 reserved */
#define  PCI_ROM_ADDRESS_ENABLE 0x01
#define PCI_ROM_ADDRESS_MASK	(~0x7ffUL)

#define PCI_CAPABILITY_LIST	0x34	/* Offset of first capability list entry */

/* 0x35-0x3b are reserved */
#define PCI_INTERRUPT_LINE	0x3c	/* 8 bits */
#define PCI_INTERRUPT_PIN	0x3d	/* 8 bits */
#define PCI_MIN_GNT		0x3e	/* 8 bits */
#define PCI_MAX_LAT		0x3f	/* 8 bits */

/* Header type 1 (PCI-to-PCI bridges) */
#define PCI_PRIMARY_BUS		0x18	/* Primary bus number */
#define PCI_SECONDARY_BUS	0x19	/* Secondary bus number */
#define PCI_SUBORDINATE_BUS	0x1a	/* Highest bus number behind the bridge */
#define PCI_SEC_LATENCY_TIMER	0x1b	/* Latency timer for secondary interface */
#define PCI_IO_BASE		0x1c	/* I/O range behind the bridge */
#define PCI_IO_LIMIT		0x1d
#define  PCI_IO_RANGE_TYPE_MASK 0x0f	/* I/O bridging type */
#define  PCI_IO_RANGE_TYPE_16	0x00
#define  PCI_IO_RANGE_TYPE_32	0x01
#define  PCI_IO_RANGE_MASK	~0x0f
#define PCI_SEC_STATUS		0x1e	/* Secondary status register, only bit 14 used */
#define PCI_MEMORY_BASE		0x20	/* Memory range behind */
#define PCI_MEMORY_LIMIT	0x22
#define  PCI_MEMORY_RANGE_TYPE_MASK 0x0f
#define  PCI_MEMORY_RANGE_MASK	~0x0f
#define PCI_PREF_MEMORY_BASE	0x24	/* Prefetchable memory range behind */
#define PCI_PREF_MEMORY_LIMIT	0x26
#define  PCI_PREF_RANGE_TYPE_MASK 0x0f
#define  PCI_PREF_RANGE_TYPE_32 0x00
#define  PCI_PREF_RANGE_TYPE_64 0x01
#define  PCI_PREF_RANGE_MASK	~0x0f
#define PCI_PREF_BASE_UPPER32	0x28	/* Upper half of prefetchable memory range */
#define PCI_PREF_LIMIT_UPPER32	0x2c
#define PCI_IO_BASE_UPPER16	0x30	/* Upper half of I/O addresses */
#define PCI_IO_LIMIT_UPPER16	0x32
/* 0x34 same as for htype 0 */
/* 0x35-0x3b is reserved */
#define PCI_ROM_ADDRESS1	0x38	/* Same as PCI_ROM_ADDRESS, but for htype 1 */
/* 0x3c-0x3d are same as for htype 0 */
#define PCI_BRIDGE_CONTROL	0x3e
#define  PCI_BRIDGE_CTL_PARITY	0x01	/* Enable parity detection on secondary interface */
#define  PCI_BRIDGE_CTL_SERR	0x02	/* The same for SERR forwarding */
#define  PCI_BRIDGE_CTL_NO_ISA	0x04	/* Disable bridging of ISA ports */
#define  PCI_BRIDGE_CTL_VGA	0x08	/* Forward VGA addresses */
#define  PCI_BRIDGE_CTL_MASTER_ABORT 0x20  /* Report master aborts */
#define  PCI_BRIDGE_CTL_BUS_RESET 0x40	/* Secondary bus reset */
#define  PCI_BRIDGE_CTL_FAST_BACK 0x80	/* Fast Back2Back enabled on secondary interface */

/* Header type 2 (CardBus bridges) */
#define PCI_CB_CAPABILITY_LIST	0x14
/* 0x15 reserved */
#define PCI_CB_SEC_STATUS	0x16	/* Secondary status */
#define PCI_CB_PRIMARY_BUS	0x18	/* PCI bus number */
#define PCI_CB_CARD_BUS		0x19	/* CardBus bus number */
#define PCI_CB_SUBORDINATE_BUS	0x1a	/* Subordinate bus number */
#define PCI_CB_LATENCY_TIMER	0x1b	/* CardBus latency timer */
#define PCI_CB_MEMORY_BASE_0	0x1c
#define PCI_CB_MEMORY_LIMIT_0	0x20
#define PCI_CB_MEMORY_BASE_1	0x24
#define PCI_CB_MEMORY_LIMIT_1	0x28
#define PCI_CB_IO_BASE_0	0x2c
#define PCI_CB_IO_BASE_0_HI	0x2e
#define PCI_CB_IO_LIMIT_0	0x30
#define PCI_CB_IO_LIMIT_0_HI	0x32
#define PCI_CB_IO_BASE_1	0x34
#define PCI_CB_IO_BASE_1_HI	0x36
#define PCI_CB_IO_LIMIT_1	0x38
#define PCI_CB_IO_LIMIT_1_HI	0x3a
#define  PCI_CB_IO_RANGE_MASK	~0x03
/* 0x3c-0x3d are same as for htype 0 */
#define PCI_CB_BRIDGE_CONTROL	0x3e
#define  PCI_CB_BRIDGE_CTL_PARITY	0x01	/* Similar to standard bridge control register */
#define  PCI_CB_BRIDGE_CTL_SERR		0x02
#define  PCI_CB_BRIDGE_CTL_ISA		0x04
#define  PCI_CB_BRIDGE_CTL_VGA		0x08
#define  PCI_CB_BRIDGE_CTL_MASTER_ABORT 0x20
#define  PCI_CB_BRIDGE_CTL_CB_RESET	0x40	/* CardBus reset */
#define  PCI_CB_BRIDGE_CTL_16BIT_INT	0x80	/* Enable interrupt for 16-bit cards */
#define  PCI_CB_BRIDGE_CTL_PREFETCH_MEM0 0x100	/* Prefetch enable for both memory regions */
#define  PCI_CB_BRIDGE_CTL_PREFETCH_MEM1 0x200
#define  PCI_CB_BRIDGE_CTL_POST_WRITES	0x400
#define PCI_CB_SUBSYSTEM_VENDOR_ID 0x40
#define PCI_CB_SUBSYSTEM_ID	0x42
#define PCI_CB_LEGACY_MODE_BASE 0x44	/* 16-bit PC Card legacy mode base address (ExCa) */
/* 0x48-0x7f reserved */

/* Capability lists */

#define PCI_CAP_LIST_ID		0	/* Capability ID */
#define  PCI_CAP_ID_PM		0x01	/* Power Management */
#define  PCI_CAP_ID_AGP		0x02	/* Accelerated Graphics Port */
#define  PCI_CAP_ID_VPD		0x03	/* Vital Product Data */
#define  PCI_CAP_ID_SLOTID	0x04	/* Slot Identification */
#define  PCI_CAP_ID_MSI		0x05	/* Message Signalled Interrupts */
#define  PCI_CAP_ID_CHSWP	0x06	/* CompactPCI HotSwap */
#define PCI_CAP_LIST_NEXT	1	/* Next capability in the list */
#define PCI_CAP_FLAGS		2	/* Capability defined flags (16 bits) */
#define PCI_CAP_SIZEOF		4

/* Power Management Registers */

#define  PCI_PM_CAP_VER_MASK	0x0007	/* Version */
#define  PCI_PM_CAP_PME_CLOCK	0x0008	/* PME clock required */
#define  PCI_PM_CAP_AUX_POWER	0x0010	/* Auxilliary power support */
#define  PCI_PM_CAP_DSI		0x0020	/* Device specific initialization */
#define  PCI_PM_CAP_D1		0x0200	/* D1 power state support */
#define  PCI_PM_CAP_D2		0x0400	/* D2 power state support */
#define  PCI_PM_CAP_PME		0x0800	/* PME pin supported */
#define PCI_PM_CTRL		4	/* PM control and status register */
#define  PCI_PM_CTRL_STATE_MASK 0x0003	/* Current power state (D0 to D3) */
#define  PCI_PM_CTRL_PME_ENABLE 0x0100	/* PME pin enable */
#define  PCI_PM_CTRL_DATA_SEL_MASK	0x1e00	/* Data select (??) */
#define  PCI_PM_CTRL_DATA_SCALE_MASK	0x6000	/* Data scale (??) */
#define  PCI_PM_CTRL_PME_STATUS 0x8000	/* PME pin status */
#define PCI_PM_PPB_EXTENSIONS	6	/* PPB support extensions (??) */
#define  PCI_PM_PPB_B2_B3	0x40	/* Stop clock when in D3hot (??) */
#define  PCI_PM_BPCC_ENABLE	0x80	/* Bus power/clock control enable (??) */
#define PCI_PM_DATA_REGISTER	7	/* (??) */
#define PCI_PM_SIZEOF		8

/* AGP registers */

#define PCI_AGP_VERSION		2	/* BCD version number */
#define PCI_AGP_RFU		3	/* Rest of capability flags */
#define PCI_AGP_STATUS		4	/* Status register */
#define  PCI_AGP_STATUS_RQ_MASK 0xff000000	/* Maximum number of requests - 1 */
#define  PCI_AGP_STATUS_SBA	0x0200	/* Sideband addressing supported */
#define  PCI_AGP_STATUS_64BIT	0x0020	/* 64-bit addressing supported */
#define  PCI_AGP_STATUS_FW	0x0010	/* FW transfers supported */
#define  PCI_AGP_STATUS_RATE4	0x0004	/* 4x transfer rate supported */
#define  PCI_AGP_STATUS_RATE2	0x0002	/* 2x transfer rate supported */
#define  PCI_AGP_STATUS_RATE1	0x0001	/* 1x transfer rate supported */
#define PCI_AGP_COMMAND		8	/* Control register */
#define  PCI_AGP_COMMAND_RQ_MASK 0xff000000  /* Master: Maximum number of requests */
#define  PCI_AGP_COMMAND_SBA	0x0200	/* Sideband addressing enabled */
#define  PCI_AGP_COMMAND_AGP	0x0100	/* Allow processing of AGP transactions */
#define  PCI_AGP_COMMAND_64BIT	0x0020	/* Allow processing of 64-bit addresses */
#define  PCI_AGP_COMMAND_FW	0x0010	/* Force FW transfers */
#define  PCI_AGP_COMMAND_RATE4	0x0004	/* Use 4x rate */
#define  PCI_AGP_COMMAND_RATE2	0x0002	/* Use 4x rate */
#define  PCI_AGP_COMMAND_RATE1	0x0001	/* Use 4x rate */
#define PCI_AGP_SIZEOF		12

/* Slot Identification */

#define PCI_SID_ESR		2	/* Expansion Slot Register */
#define  PCI_SID_ESR_NSLOTS	0x1f	/* Number of expansion slots available */
#define  PCI_SID_ESR_FIC	0x20	/* First In Chassis Flag */
#define PCI_SID_CHASSIS_NR	3	/* Chassis Number */

/* Message Signalled Interrupts registers */

#define PCI_MSI_FLAGS		2	/* Various flags */
#define  PCI_MSI_FLAGS_64BIT	0x80	/* 64-bit addresses allowed */
#define  PCI_MSI_FLAGS_QSIZE	0x70	/* Message queue size configured */
#define  PCI_MSI_FLAGS_QMASK	0x0e	/* Maximum queue size available */
#define  PCI_MSI_FLAGS_ENABLE	0x01	/* MSI feature enabled */
#define PCI_MSI_RFU		3	/* Rest of capability flags */
#define PCI_MSI_ADDRESS_LO	4	/* Lower 32 bits */
#define PCI_MSI_ADDRESS_HI	8	/* Upper 32 bits (if PCI_MSI_FLAGS_64BIT set) */
#define PCI_MSI_DATA_32		8	/* 16 bits of data for 32-bit devices */
#define PCI_MSI_DATA_64		12	/* 16 bits of data for 64-bit devices */

#define PCI_MAX_PCI_DEVICES	32
#define PCI_MAX_PCI_FUNCTIONS	8

/* Include the ID list */

#include <pci_ids.h>

struct pci_region {
	unsigned long bus_start;		/* Start on the bus */
	unsigned long phys_start;		/* Start in physical address space */
	unsigned long size;			/* Size */
	unsigned long flags;			/* Resource flags */

	unsigned long bus_lower;
};

#define PCI_REGION_MEM		0x00000000	/* PCI memory space */
#define PCI_REGION_IO		0x00000001	/* PCI IO space */
#define PCI_REGION_TYPE		0x00000001

#define PCI_REGION_MEMORY	0x00000100	/* System memory */
#define PCI_REGION_RO		0x00000200	/* Read-only memory */

extern __inline__ void pci_set_region(struct pci_region *reg,
				      unsigned long bus_start,
				      unsigned long phys_start,
				      unsigned long size,
				      unsigned long flags) {
	reg->bus_start	= bus_start;
	reg->phys_start = phys_start;
	reg->size	= size;
	reg->flags	= flags;
}

typedef int pci_dev_t;

#define PCI_BUS(d)	(((d) >> 16) & 0xff)
#define PCI_DEV(d)	(((d) >> 11) & 0x1f)
#define PCI_FUNC(d)	(((d) >> 8) & 0x7)
#define PCI_BDF(b,d,f)	((b) << 16 | (d) << 11 | (f) << 8)

#define PCI_ANY_ID (~0)

struct pci_device_id {
	unsigned int vendor, device;		/* Vendor and device ID or PCI_ANY_ID */
};

struct pci_controller;

struct pci_config_table {
	unsigned int vendor, device;		/* Vendor and device ID or PCI_ANY_ID */
	unsigned int class;			/* Class ID, or  PCI_ANY_ID */
	unsigned int bus;			/* Bus number, or PCI_ANY_ID */
	unsigned int dev;			/* Device number, or PCI_ANY_ID */
	unsigned int func;			/* Function number, or PCI_ANY_ID */

	void (*config_device)(struct pci_controller* hose, pci_dev_t dev,
			      struct pci_config_table *);
	unsigned long priv[3];
};

extern void pci_cfgfunc_nothing(struct pci_controller* hose, pci_dev_t dev,
				struct pci_config_table *);
extern void pci_cfgfunc_config_device(struct pci_controller* hose, pci_dev_t dev,
				      struct pci_config_table *);

#define MAX_PCI_REGIONS		7

/*
 * Structure of a PCI controller (host bridge)
 */
struct pci_controller {
	struct pci_controller *next;

	int first_busno;
	int last_busno;

	volatile unsigned int *cfg_addr;
	volatile unsigned char *cfg_data;

	struct pci_region regions[MAX_PCI_REGIONS];
	int region_count;

	struct pci_config_table *config_table;

	void (*fixup_irq)(struct pci_controller *, pci_dev_t);

	/* Low-level architecture-dependent routines */
	int (*read_byte)(struct pci_controller*, pci_dev_t, int where, u8 *);
	int (*read_word)(struct pci_controller*, pci_dev_t, int where, u16 *);
	int (*read_dword)(struct pci_controller*, pci_dev_t, int where, u32 *);
	int (*write_byte)(struct pci_controller*, pci_dev_t, int where, u8);
	int (*write_word)(struct pci_controller*, pci_dev_t, int where, u16);
	int (*write_dword)(struct pci_controller*, pci_dev_t, int where, u32);

	/* Used by auto config */
	struct pci_region *pci_mem, *pci_io;

	/* Used by ppc405 autoconfig*/
	struct pci_region *pci_fb;
	int current_busno;
};

extern __inline__ void pci_set_ops(struct pci_controller *hose,
				   int (*read_byte)(struct pci_controller*,
						    pci_dev_t, int where, u8 *),
				   int (*read_word)(struct pci_controller*,
						    pci_dev_t, int where, u16 *),
				   int (*read_dword)(struct pci_controller*,
						     pci_dev_t, int where, u32 *),
				   int (*write_byte)(struct pci_controller*,
						     pci_dev_t, int where, u8),
				   int (*write_word)(struct pci_controller*,
						     pci_dev_t, int where, u16),
				   int (*write_dword)(struct pci_controller*,
						      pci_dev_t, int where, u32)) {
	hose->read_byte   = read_byte;
	hose->read_word   = read_word;
	hose->read_dword  = read_dword;
	hose->write_byte  = write_byte;
	hose->write_word  = write_word;
	hose->write_dword = write_dword;
}

extern void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data);

extern unsigned long pci_hose_bus_to_phys(struct pci_controller* hose,
					  unsigned long addr, unsigned long flags);
extern unsigned long pci_hose_phys_to_bus(struct pci_controller* hose,
					  unsigned long addr, unsigned long flags);

#define pci_phys_to_bus(dev, addr, flags) \
	pci_hose_phys_to_bus(pci_bus_to_hose(PCI_BUS(dev)), (addr), (flags))
#define pci_bus_to_phys(dev, addr, flags) \
	pci_hose_bus_to_phys(pci_bus_to_hose(PCI_BUS(dev)), (addr), (flags))

#define pci_phys_to_mem(dev, addr)	pci_phys_to_bus((dev), (addr), PCI_REGION_MEM)
#define pci_mem_to_phys(dev, addr)	pci_bus_to_phys((dev), (addr), PCI_REGION_MEM)
#define pci_phys_to_io(dev, addr)	pci_phys_to_bus((dev), (addr), PCI_REGION_IO)
#define pci_io_to_phys(dev, addr)	pci_bus_to_phys((dev), (addr), PCI_REGION_IO)

extern int pci_hose_read_config_byte(struct pci_controller *hose,
				     pci_dev_t dev, int where, u8 *val);
extern int pci_hose_read_config_word(struct pci_controller *hose,
				     pci_dev_t dev, int where, u16 *val);
extern int pci_hose_read_config_dword(struct pci_controller *hose,
				      pci_dev_t dev, int where, u32 *val);
extern int pci_hose_write_config_byte(struct pci_controller *hose,
				      pci_dev_t dev, int where, u8 val);
extern int pci_hose_write_config_word(struct pci_controller *hose,
				      pci_dev_t dev, int where, u16 val);
extern int pci_hose_write_config_dword(struct pci_controller *hose,
				       pci_dev_t dev, int where, u32 val);

extern int pci_read_config_byte(pci_dev_t dev, int where, u8 *val);
extern int pci_read_config_word(pci_dev_t dev, int where, u16 *val);
extern int pci_read_config_dword(pci_dev_t dev, int where, u32 *val);
extern int pci_write_config_byte(pci_dev_t dev, int where, u8 val);
extern int pci_write_config_word(pci_dev_t dev, int where, u16 val);
extern int pci_write_config_dword(pci_dev_t dev, int where, u32 val);

extern int pci_hose_read_config_byte_via_dword(struct pci_controller *hose,
					       pci_dev_t dev, int where, u8 *val);
extern int pci_hose_read_config_word_via_dword(struct pci_controller *hose,
					       pci_dev_t dev, int where, u16 *val);
extern int pci_hose_write_config_byte_via_dword(struct pci_controller *hose,
						pci_dev_t dev, int where, u8 val);
extern int pci_hose_write_config_word_via_dword(struct pci_controller *hose,
						pci_dev_t dev, int where, u16 val);

extern void pci_register_hose(struct pci_controller* hose);
extern struct pci_controller* pci_bus_to_hose(int bus);

extern int pci_hose_scan(struct pci_controller *hose);
extern int pci_hose_scan_bus(struct pci_controller *hose, int bus);

extern void pciauto_region_init(struct pci_region* res);
extern void pciauto_region_align(struct pci_region *res, unsigned long size);
extern int pciauto_region_allocate(struct pci_region* res, unsigned int size, unsigned int *bar);
extern void pciauto_setup_device(struct pci_controller *hose,
				 pci_dev_t dev, int bars_num,
				 struct pci_region *mem,
				 struct pci_region *io);
int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev);

extern pci_dev_t pci_find_device (unsigned int vendor, unsigned int device, int index);
extern pci_dev_t pci_find_devices (struct pci_device_id *ids, int index);

extern int pci_hose_config_device(struct pci_controller *hose,
				  pci_dev_t dev,
				  unsigned long io,
				  unsigned long mem,
				  unsigned long command);

#ifdef CONFIG_MPC824X
extern void pci_mpc824x_init (struct pci_controller *hose);
#endif

#endif	/* _PCI_H */