u-boot/include/pci.h

/*
 * (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.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#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_CODE_TOO_OLD	0x00
#define  PCI_CLASS_CODE_STORAGE 0x01
#define  PCI_CLASS_CODE_NETWORK 0x02
#define  PCI_CLASS_CODE_DISPLAY	0x03
#define  PCI_CLASS_CODE_MULTIMEDIA 0x04
#define  PCI_CLASS_CODE_MEMORY	0x05
#define  PCI_CLASS_CODE_BRIDGE	0x06
#define  PCI_CLASS_CODE_COMM	0x07
#define  PCI_CLASS_CODE_PERIPHERAL 0x08
#define  PCI_CLASS_CODE_INPUT	0x09
#define  PCI_CLASS_CODE_DOCKING	0x0A
#define  PCI_CLASS_CODE_PROCESSOR 0x0B
#define  PCI_CLASS_CODE_SERIAL	0x0C
#define  PCI_CLASS_CODE_WIRELESS 0x0D
#define  PCI_CLASS_CODE_I2O	0x0E
#define  PCI_CLASS_CODE_SATELLITE 0x0F
#define  PCI_CLASS_CODE_CRYPTO	0x10
#define  PCI_CLASS_CODE_DATA	0x11
/* Base Class 0x12 - 0xFE is reserved */
#define  PCI_CLASS_CODE_OTHER	0xFF

#define PCI_CLASS_SUB_CODE	0x0a	/* Device sub-class code */
#define  PCI_CLASS_SUB_CODE_TOO_OLD_NOTVGA	0x00
#define  PCI_CLASS_SUB_CODE_TOO_OLD_VGA		0x01
#define  PCI_CLASS_SUB_CODE_STORAGE_SCSI	0x00
#define  PCI_CLASS_SUB_CODE_STORAGE_IDE		0x01
#define  PCI_CLASS_SUB_CODE_STORAGE_FLOPPY	0x02
#define  PCI_CLASS_SUB_CODE_STORAGE_IPIBUS	0x03
#define  PCI_CLASS_SUB_CODE_STORAGE_RAID	0x04
#define  PCI_CLASS_SUB_CODE_STORAGE_ATA		0x05
#define  PCI_CLASS_SUB_CODE_STORAGE_SATA	0x06
#define  PCI_CLASS_SUB_CODE_STORAGE_SAS		0x07
#define  PCI_CLASS_SUB_CODE_STORAGE_OTHER	0x80
#define  PCI_CLASS_SUB_CODE_NETWORK_ETHERNET	0x00
#define  PCI_CLASS_SUB_CODE_NETWORK_TOKENRING	0x01
#define  PCI_CLASS_SUB_CODE_NETWORK_FDDI	0x02
#define  PCI_CLASS_SUB_CODE_NETWORK_ATM		0x03
#define  PCI_CLASS_SUB_CODE_NETWORK_ISDN	0x04
#define  PCI_CLASS_SUB_CODE_NETWORK_WORLDFIP	0x05
#define  PCI_CLASS_SUB_CODE_NETWORK_PICMG	0x06
#define  PCI_CLASS_SUB_CODE_NETWORK_OTHER	0x80
#define  PCI_CLASS_SUB_CODE_DISPLAY_VGA		0x00
#define  PCI_CLASS_SUB_CODE_DISPLAY_XGA		0x01
#define  PCI_CLASS_SUB_CODE_DISPLAY_3D		0x02
#define  PCI_CLASS_SUB_CODE_DISPLAY_OTHER	0x80
#define  PCI_CLASS_SUB_CODE_MULTIMEDIA_VIDEO	0x00
#define  PCI_CLASS_SUB_CODE_MULTIMEDIA_AUDIO	0x01
#define  PCI_CLASS_SUB_CODE_MULTIMEDIA_PHONE	0x02
#define  PCI_CLASS_SUB_CODE_MULTIMEDIA_OTHER	0x80
#define  PCI_CLASS_SUB_CODE_MEMORY_RAM		0x00
#define  PCI_CLASS_SUB_CODE_MEMORY_FLASH	0x01
#define  PCI_CLASS_SUB_CODE_MEMORY_OTHER	0x80
#define  PCI_CLASS_SUB_CODE_BRIDGE_HOST		0x00
#define  PCI_CLASS_SUB_CODE_BRIDGE_ISA		0x01
#define  PCI_CLASS_SUB_CODE_BRIDGE_EISA		0x02
#define  PCI_CLASS_SUB_CODE_BRIDGE_MCA		0x03
#define  PCI_CLASS_SUB_CODE_BRIDGE_PCI		0x04
#define  PCI_CLASS_SUB_CODE_BRIDGE_PCMCIA	0x05
#define  PCI_CLASS_SUB_CODE_BRIDGE_NUBUS	0x06
#define  PCI_CLASS_SUB_CODE_BRIDGE_CARDBUS	0x07
#define  PCI_CLASS_SUB_CODE_BRIDGE_RACEWAY	0x08
#define  PCI_CLASS_SUB_CODE_BRIDGE_SEMI_PCI	0x09
#define  PCI_CLASS_SUB_CODE_BRIDGE_INFINIBAND	0x0A
#define  PCI_CLASS_SUB_CODE_BRIDGE_OTHER	0x80
#define  PCI_CLASS_SUB_CODE_COMM_SERIAL		0x00
#define  PCI_CLASS_SUB_CODE_COMM_PARALLEL	0x01
#define  PCI_CLASS_SUB_CODE_COMM_MULTIPORT	0x02
#define  PCI_CLASS_SUB_CODE_COMM_MODEM		0x03
#define  PCI_CLASS_SUB_CODE_COMM_GPIB		0x04
#define  PCI_CLASS_SUB_CODE_COMM_SMARTCARD	0x05
#define  PCI_CLASS_SUB_CODE_COMM_OTHER		0x80
#define  PCI_CLASS_SUB_CODE_PERIPHERAL_PIC	0x00
#define  PCI_CLASS_SUB_CODE_PERIPHERAL_DMA	0x01
#define  PCI_CLASS_SUB_CODE_PERIPHERAL_TIMER	0x02
#define  PCI_CLASS_SUB_CODE_PERIPHERAL_RTC	0x03
#define  PCI_CLASS_SUB_CODE_PERIPHERAL_HOTPLUG	0x04
#define  PCI_CLASS_SUB_CODE_PERIPHERAL_SD	0x05
#define  PCI_CLASS_SUB_CODE_PERIPHERAL_OTHER	0x80
#define  PCI_CLASS_SUB_CODE_INPUT_KEYBOARD	0x00
#define  PCI_CLASS_SUB_CODE_INPUT_DIGITIZER	0x01
#define  PCI_CLASS_SUB_CODE_INPUT_MOUSE		0x02
#define  PCI_CLASS_SUB_CODE_INPUT_SCANNER	0x03
#define  PCI_CLASS_SUB_CODE_INPUT_GAMEPORT	0x04
#define  PCI_CLASS_SUB_CODE_INPUT_OTHER		0x80
#define  PCI_CLASS_SUB_CODE_DOCKING_GENERIC	0x00
#define  PCI_CLASS_SUB_CODE_DOCKING_OTHER	0x80
#define  PCI_CLASS_SUB_CODE_PROCESSOR_386	0x00
#define  PCI_CLASS_SUB_CODE_PROCESSOR_486	0x01
#define  PCI_CLASS_SUB_CODE_PROCESSOR_PENTIUM	0x02
#define  PCI_CLASS_SUB_CODE_PROCESSOR_ALPHA	0x10
#define  PCI_CLASS_SUB_CODE_PROCESSOR_POWERPC	0x20
#define  PCI_CLASS_SUB_CODE_PROCESSOR_MIPS	0x30
#define  PCI_CLASS_SUB_CODE_PROCESSOR_COPROC	0x40
#define  PCI_CLASS_SUB_CODE_SERIAL_1394		0x00
#define  PCI_CLASS_SUB_CODE_SERIAL_ACCESSBUS	0x01
#define  PCI_CLASS_SUB_CODE_SERIAL_SSA		0x02
#define  PCI_CLASS_SUB_CODE_SERIAL_USB		0x03
#define  PCI_CLASS_SUB_CODE_SERIAL_FIBRECHAN	0x04
#define  PCI_CLASS_SUB_CODE_SERIAL_SMBUS	0x05
#define  PCI_CLASS_SUB_CODE_SERIAL_INFINIBAND	0x06
#define  PCI_CLASS_SUB_CODE_SERIAL_IPMI		0x07
#define  PCI_CLASS_SUB_CODE_SERIAL_SERCOS	0x08
#define  PCI_CLASS_SUB_CODE_SERIAL_CANBUS	0x09
#define  PCI_CLASS_SUB_CODE_WIRELESS_IRDA	0x00
#define  PCI_CLASS_SUB_CODE_WIRELESS_IR		0x01
#define  PCI_CLASS_SUB_CODE_WIRELESS_RF		0x10
#define  PCI_CLASS_SUB_CODE_WIRELESS_BLUETOOTH	0x11
#define  PCI_CLASS_SUB_CODE_WIRELESS_BROADBAND	0x12
#define  PCI_CLASS_SUB_CODE_WIRELESS_80211A	0x20
#define  PCI_CLASS_SUB_CODE_WIRELESS_80211B	0x21
#define  PCI_CLASS_SUB_CODE_WIRELESS_OTHER	0x80
#define  PCI_CLASS_SUB_CODE_I2O_V1_0		0x00
#define  PCI_CLASS_SUB_CODE_SATELLITE_TV	0x01
#define  PCI_CLASS_SUB_CODE_SATELLITE_AUDIO	0x02
#define  PCI_CLASS_SUB_CODE_SATELLITE_VOICE	0x03
#define  PCI_CLASS_SUB_CODE_SATELLITE_DATA	0x04
#define  PCI_CLASS_SUB_CODE_CRYPTO_NETWORK	0x00
#define  PCI_CLASS_SUB_CODE_CRYPTO_ENTERTAINMENT 0x10
#define  PCI_CLASS_SUB_CODE_CRYPTO_OTHER	0x80
#define  PCI_CLASS_SUB_CODE_DATA_DPIO		0x00
#define  PCI_CLASS_SUB_CODE_DATA_PERFCNTR	0x01
#define  PCI_CLASS_SUB_CODE_DATA_COMMSYNC	0x10
#define  PCI_CLASS_SUB_CODE_DATA_MGMT		0x20
#define  PCI_CLASS_SUB_CODE_DATA_OTHER		0x80

#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	(~0x0fULL)
#define  PCI_BASE_ADDRESS_IO_MASK	(~0x03ULL)
/* 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	(~0x7ffULL)

#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 */

/* From 440ep */
#define PCI_ERREN       0x48     /* Error Enable */
#define PCI_ERRSTS      0x49     /* Error Status */
#define PCI_BRDGOPT1    0x4A     /* PCI Bridge Options 1 */
#define PCI_PLBSESR0    0x4C     /* PCI PLB Slave Error Syndrome 0 */
#define PCI_PLBSESR1    0x50     /* PCI PLB Slave Error Syndrome 1 */
#define PCI_PLBSEAR     0x54     /* PCI PLB Slave Error Address */
#define PCI_CAPID       0x58     /* Capability Identifier */
#define PCI_NEXTITEMPTR 0x59     /* Next Item Pointer */
#define PCI_PMC         0x5A     /* Power Management Capabilities */
#define PCI_PMCSR       0x5C     /* Power Management Control Status */
#define PCI_PMCSRBSE    0x5E     /* PMCSR PCI to PCI Bridge Support Extensions */
#define PCI_BRDGOPT2    0x60     /* PCI Bridge Options 2 */
#define PCI_PMSCRR      0x64     /* Power Management State Change Request Re. */

/* 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_ID_EXP 	0x10	/* PCI Express */
#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

/* PCI-X registers */

#define  PCI_X_CMD_DPERR_E      0x0001  /* Data Parity Error Recovery Enable */
#define  PCI_X_CMD_ERO          0x0002  /* Enable Relaxed Ordering */
#define  PCI_X_CMD_MAX_READ     0x0000  /* Max Memory Read Byte Count */
#define  PCI_X_CMD_MAX_SPLIT    0x0030  /* Max Outstanding Split Transactions */
#define  PCI_X_CMD_VERSION(x)   (((x) >> 12) & 3) /* Version */


/* 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

#define PCI_FIND_CAP_TTL 0x48
#define CAP_START_POS 0x40

/* Include the ID list */

#include <pci_ids.h>

#ifndef __ASSEMBLY__

#ifdef CONFIG_SYS_PCI_64BIT
typedef u64 pci_addr_t;
typedef u64 pci_size_t;
#else
typedef u32 pci_addr_t;
typedef u32 pci_size_t;
#endif

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

	pci_addr_t 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_PREFETCH	0x00000008	/* prefetchable PCI memory */

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

static inline void pci_set_region(struct pci_region *reg,
				      pci_addr_t bus_start,
				      phys_addr_t phys_start,
				      pci_size_t 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_DEVFN(d, f)		((d) << 11 | (f) << 8)
#define PCI_MASK_BUS(bdf)	((bdf) & 0xffff)
#define PCI_ADD_BUS(bus, devfn)	(((bus) << 16) | (devfn))
#define PCI_BDF(b, d, f)	((b) << 16 | PCI_DEVFN(d, f))
#define PCI_VENDEV(v, d)	(((v) << 16) | (d))
#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_do_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

#define INDIRECT_TYPE_NO_PCIE_LINK	1

/*
 * Structure of a PCI controller (host bridge)
 */
struct pci_controller {
#ifdef CONFIG_DM_PCI
	struct udevice *bus;
	struct udevice *ctlr;
#else
	struct pci_controller *next;
#endif

	int first_busno;
	int last_busno;

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

	int indirect_type;

	/*
	 * TODO(sjg@chromium.org): With driver model we use struct
	 * pci_controller for both the controller and any bridge devices
	 * attached to it. But there is only one region list and it is in the
	 * top-level controller.
	 *
	 * This could be changed so that struct pci_controller is only used
	 * for PCI controllers and a separate UCLASS (or perhaps
	 * UCLASS_PCI_GENERIC) is used for bridges.
	 */
	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);
#ifndef CONFIG_DM_PCI
	/* 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);
#endif

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

	/* Used by ppc405 autoconfig*/
	struct pci_region *pci_fb;
#ifndef CONFIG_DM_PCI
	int current_busno;

	void *priv_data;
#endif
};

#ifndef CONFIG_DM_PCI
static 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;
}
#endif

#ifdef CONFIG_PCI_INDIRECT_BRIDGE
extern void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data);
#endif

extern phys_addr_t pci_hose_bus_to_phys(struct pci_controller* hose,
					pci_addr_t addr, unsigned long flags);
extern pci_addr_t pci_hose_phys_to_bus(struct pci_controller* hose,
					phys_addr_t 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_virt_to_bus(dev, addr, flags) \
	pci_hose_phys_to_bus(pci_bus_to_hose(PCI_BUS(dev)), \
			     (virt_to_phys(addr)), (flags))
#define pci_bus_to_virt(dev, addr, flags, len, map_flags) \
	map_physmem(pci_hose_bus_to_phys(pci_bus_to_hose(PCI_BUS(dev)), \
					 (addr), (flags)), \
		    (len), (map_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)

#define pci_virt_to_mem(dev, addr) \
	pci_virt_to_bus((dev), (addr), PCI_REGION_MEM)
#define pci_mem_to_virt(dev, addr, len, map_flags) \
	pci_bus_to_virt((dev), (addr), PCI_REGION_MEM, (len), (map_flags))
#define pci_virt_to_io(dev, addr) \
	pci_virt_to_bus((dev), (addr), PCI_REGION_IO)
#define pci_io_to_virt(dev, addr, len, map_flags) \
	pci_bus_to_virt((dev), (addr), PCI_REGION_IO, (len), (map_flags))

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);

#ifndef CONFIG_DM_PCI
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);
#endif

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_map_bar(pci_dev_t pdev, int bar, int flags);
extern void pci_register_hose(struct pci_controller* hose);
extern struct pci_controller* pci_bus_to_hose(int bus);
extern struct pci_controller *find_hose_by_cfg_addr(void *cfg_addr);

extern int pci_skip_dev(struct pci_controller *hose, pci_dev_t dev);
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, pci_size_t size);
extern int pciauto_region_allocate(struct pci_region* res, pci_size_t size, pci_addr_t *bar);
extern void pciauto_setup_device(struct pci_controller *hose,
				 pci_dev_t dev, int bars_num,
				 struct pci_region *mem,
				 struct pci_region *prefetch,
				 struct pci_region *io);
extern void pciauto_prescan_setup_bridge(struct pci_controller *hose,
				 pci_dev_t dev, int sub_bus);
extern void pciauto_postscan_setup_bridge(struct pci_controller *hose,
				 pci_dev_t dev, int sub_bus);
extern void pciauto_config_init(struct pci_controller *hose);
extern 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);
pci_dev_t pci_find_class(unsigned int find_class, int index);

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

extern int pci_hose_find_capability(struct pci_controller *hose, pci_dev_t dev,
				    int cap);
extern int pci_hose_find_cap_start(struct pci_controller *hose, pci_dev_t dev,
				   u8 hdr_type);
extern int pci_find_cap(struct pci_controller *hose, pci_dev_t dev, int pos,
			int cap);

#ifdef CONFIG_PCI_FIXUP_DEV
extern void board_pci_fixup_dev(struct pci_controller *hose, pci_dev_t dev,
				unsigned short vendor,
				unsigned short device,
				unsigned short class);
#endif

const char * pci_class_str(u8 class);
int pci_last_busno(void);

#ifdef CONFIG_MPC85xx
extern void pci_mpc85xx_init (struct pci_controller *hose);
#endif

/**
 * pci_write_bar32() - Write the address of a BAR including control bits
 *
 * This writes a raw address (with control bits) to a bar
 *
 * @hose:	PCI hose to use
 * @dev:	PCI device to update
 * @barnum:	BAR number (0-5)
 * @addr:	BAR address with control bits
 */
void pci_write_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum,
		     u32 addr_and_ctrl);

/**
 * pci_read_bar32() - read the address of a bar
 *
 * @hose:	PCI hose to use
 * @dev:	PCI device to inspect
 * @barnum:	BAR number (0-5)
 * @return address of the bar, masking out any control bits
 * */
u32 pci_read_bar32(struct pci_controller *hose, pci_dev_t dev, int barnum);

/**
 * pciauto_setup_rom() - Set up access to a device ROM
 *
 * @hose:	PCI hose to use
 * @dev:	PCI device to adjust
 * @return 0 if done, -ve on error
 */
int pciauto_setup_rom(struct pci_controller *hose, pci_dev_t dev);

/**
 * pci_hose_find_devices() - Find devices by vendor/device ID
 *
 * @hose:	PCI hose to search
 * @busnum:	Bus number to search
 * @ids:	PCI vendor/device IDs to look for, terminated by 0, 0 record
 * @indexp:	Pointer to device index to find. To find the first matching
 *		device, pass 0; to find the second, pass 1, etc. This
 *		parameter is decremented for each non-matching device so
 *		can be called repeatedly.
 */
pci_dev_t pci_hose_find_devices(struct pci_controller *hose, int busnum,
				struct pci_device_id *ids, int *indexp);

/* Access sizes for PCI reads and writes */
enum pci_size_t {
	PCI_SIZE_8,
	PCI_SIZE_16,
	PCI_SIZE_32,
};

struct udevice;

#ifdef CONFIG_DM_PCI
/**
 * struct pci_child_platdata - information stored about each PCI device
 *
 * Every device on a PCI bus has this per-child data.
 *
 * It can be accessed using dev_get_parentdata(dev) if dev->parent is a
 * PCI bus (i.e. UCLASS_PCI)
 *
 * @devfn:	Encoded device and function index - see PCI_DEVFN()
 * @vendor:	PCI vendor ID (see pci_ids.h)
 * @device:	PCI device ID (see pci_ids.h)
 * @class:	PCI class, 3 bytes: (base, sub, prog-if)
 */
struct pci_child_platdata {
	int devfn;
	unsigned short vendor;
	unsigned short device;
	unsigned int class;
};

/* PCI bus operations */
struct dm_pci_ops {
	/**
	 * read_config() - Read a PCI configuration value
	 *
	 * PCI buses must support reading and writing configuration values
	 * so that the bus can be scanned and its devices configured.
	 *
	 * Normally PCI_BUS(@bdf) is the same as @bus->seq, but not always.
	 * If bridges exist it is possible to use the top-level bus to
	 * access a sub-bus. In that case @bus will be the top-level bus
	 * and PCI_BUS(bdf) will be a different (higher) value
	 *
	 * @bus:	Bus to read from
	 * @bdf:	Bus, device and function to read
	 * @offset:	Byte offset within the device's configuration space
	 * @valuep:	Place to put the returned value
	 * @size:	Access size
	 * @return 0 if OK, -ve on error
	 */
	int (*read_config)(struct udevice *bus, pci_dev_t bdf, uint offset,
			   ulong *valuep, enum pci_size_t size);
	/**
	 * write_config() - Write a PCI configuration value
	 *
	 * @bus:	Bus to write to
	 * @bdf:	Bus, device and function to write
	 * @offset:	Byte offset within the device's configuration space
	 * @value:	Value to write
	 * @size:	Access size
	 * @return 0 if OK, -ve on error
	 */
	int (*write_config)(struct udevice *bus, pci_dev_t bdf, uint offset,
			    ulong value, enum pci_size_t size);
};

/* Get access to a PCI bus' operations */
#define pci_get_ops(dev)	((struct dm_pci_ops *)(dev)->driver->ops)

/**
 * pci_bind_bus_devices() - scan a PCI bus and bind devices
 *
 * Scan a PCI bus looking for devices. Bind each one that is found. If
 * devices are already bound that match the scanned devices, just update the
 * child data so that the device can be used correctly (this happens when
 * the device tree describes devices we expect to see on the bus).
 *
 * Devices that are bound in this way will use a generic PCI driver which
 * does nothing. The device can still be accessed but will not provide any
 * driver interface.
 *
 * @bus:	Bus containing devices to bind
 * @return 0 if OK, -ve on error
 */
int pci_bind_bus_devices(struct udevice *bus);

/**
 * pci_auto_config_devices() - configure bus devices ready for use
 *
 * This works through all devices on a bus by scanning the driver model
 * data structures (normally these have been set up by pci_bind_bus_devices()
 * earlier).
 *
 * Space is allocated for each PCI base address register (BAR) so that the
 * devices are mapped into memory and I/O space ready for use.
 *
 * @bus:	Bus containing devices to bind
 * @return 0 if OK, -ve on error
 */
int pci_auto_config_devices(struct udevice *bus);

/**
 * pci_bus_find_bdf() - Find a device given its PCI bus address
 *
 * @bdf:	PCI device address: bus, device and function -see PCI_BDF()
 * @devp:	Returns the device for this address, if found
 * @return 0 if OK, -ENODEV if not found
 */
int pci_bus_find_bdf(pci_dev_t bdf, struct udevice **devp);

/**
 * pci_bus_find_devfn() - Find a device on a bus
 *
 * @find_devfn:		PCI device address (device and function only)
 * @devp:	Returns the device for this address, if found
 * @return 0 if OK, -ENODEV if not found
 */
int pci_bus_find_devfn(struct udevice *bus, pci_dev_t find_devfn,
		       struct udevice **devp);

/**
 * pci_get_ff() - Returns a mask for the given access size
 *
 * @size:	Access size
 * @return 0xff for PCI_SIZE_8, 0xffff for PCI_SIZE_16, 0xffffffff for
 * PCI_SIZE_32
 */
int pci_get_ff(enum pci_size_t size);

/**
 * pci_bus_find_devices () - Find devices on a bus
 *
 * @bus:	Bus to search
 * @ids:	PCI vendor/device IDs to look for, terminated by 0, 0 record
 * @indexp:	Pointer to device index to find. To find the first matching
 *		device, pass 0; to find the second, pass 1, etc. This
 *		parameter is decremented for each non-matching device so
 *		can be called repeatedly.
 * @devp:	Returns matching device if found
 * @return 0 if found, -ENODEV if not
 */
int pci_bus_find_devices(struct udevice *bus, struct pci_device_id *ids,
			 int *indexp, struct udevice **devp);

/**
 * pci_find_device_id() - Find a device on any bus
 *
 * @ids:	PCI vendor/device IDs to look for, terminated by 0, 0 record
 * @index:	Index number of device to find, 0 for the first match, 1 for
 *		the second, etc.
 * @devp:	Returns matching device if found
 * @return 0 if found, -ENODEV if not
 */
int pci_find_device_id(struct pci_device_id *ids, int index,
		       struct udevice **devp);

/**
 * dm_pci_hose_probe_bus() - probe a subordinate bus, scanning it for devices
 *
 * This probes the given bus which causes it to be scanned for devices. The
 * devices will be bound but not probed.
 *
 * @hose specifies the PCI hose that will be used for the scan. This is
 * always a top-level bus with uclass UCLASS_PCI. The bus to scan is
 * in @bdf, and is a subordinate bus reachable from @hose.
 *
 * @hose:	PCI hose to scan
 * @bdf:	PCI bus address to scan (PCI_BUS(bdf) is the bus number)
 * @return 0 if OK, -ve on error
 */
int dm_pci_hose_probe_bus(struct pci_controller *hose, pci_dev_t bdf);

/**
 * pci_bus_read_config() - Read a configuration value from a device
 *
 * TODO(sjg@chromium.org): We should be able to pass just a device and have
 * it do the right thing. It would be good to have that function also.
 *
 * @bus:	Bus to read from
 * @bdf:	PCI device address: bus, device and function -see PCI_BDF()
 * @valuep:	Place to put the returned value
 * @size:	Access size
 * @return 0 if OK, -ve on error
 */
int pci_bus_read_config(struct udevice *bus, pci_dev_t bdf, int offset,
			unsigned long *valuep, enum pci_size_t size);

/**
 * pci_bus_write_config() - Write a configuration value to a device
 *
 * @bus:	Bus to write from
 * @bdf:	PCI device address: bus, device and function -see PCI_BDF()
 * @value:	Value to write
 * @size:	Access size
 * @return 0 if OK, -ve on error
 */
int pci_bus_write_config(struct udevice *bus, pci_dev_t bdf, int offset,
			 unsigned long value, enum pci_size_t size);

/*
 * The following functions provide access to the above without needing the
 * size parameter. We are trying to encourage the use of the 8/16/32-style
 * functions, rather than byte/word/dword. But both are supported.
 */
int pci_write_config32(pci_dev_t pcidev, int offset, u32 value);

/* Compatibility with old naming */
static inline int pci_write_config_dword(pci_dev_t pcidev, int offset,
					 u32 value)
{
	return pci_write_config32(pcidev, offset, value);
}

int pci_write_config16(pci_dev_t pcidev, int offset, u16 value);

/* Compatibility with old naming */
static inline int pci_write_config_word(pci_dev_t pcidev, int offset,
					u16 value)
{
	return pci_write_config16(pcidev, offset, value);
}

int pci_write_config8(pci_dev_t pcidev, int offset, u8 value);

/* Compatibility with old naming */
static inline int pci_write_config_byte(pci_dev_t pcidev, int offset,
					u8 value)
{
	return pci_write_config8(pcidev, offset, value);
}

int pci_read_config32(pci_dev_t pcidev, int offset, u32 *valuep);

/* Compatibility with old naming */
static inline int pci_read_config_dword(pci_dev_t pcidev, int offset,
					u32 *valuep)
{
	return pci_read_config32(pcidev, offset, valuep);
}

int pci_read_config16(pci_dev_t pcidev, int offset, u16 *valuep);

/* Compatibility with old naming */
static inline int pci_read_config_word(pci_dev_t pcidev, int offset,
				       u16 *valuep)
{
	return pci_read_config16(pcidev, offset, valuep);
}

int pci_read_config8(pci_dev_t pcidev, int offset, u8 *valuep);

/* Compatibility with old naming */
static inline int pci_read_config_byte(pci_dev_t pcidev, int offset,
				       u8 *valuep)
{
	return pci_read_config8(pcidev, offset, valuep);
}

/**
 * struct dm_pci_emul_ops - PCI device emulator operations
 */
struct dm_pci_emul_ops {
	/**
	 * get_devfn(): Check which device and function this emulators
	 *
	 * @dev:	device to check
	 * @return the device and function this emulates, or -ve on error
	 */
	int (*get_devfn)(struct udevice *dev);
	/**
	 * read_config() - Read a PCI configuration value
	 *
	 * @dev:	Emulated device to read from
	 * @offset:	Byte offset within the device's configuration space
	 * @valuep:	Place to put the returned value
	 * @size:	Access size
	 * @return 0 if OK, -ve on error
	 */
	int (*read_config)(struct udevice *dev, uint offset, ulong *valuep,
			   enum pci_size_t size);
	/**
	 * write_config() - Write a PCI configuration value
	 *
	 * @dev:	Emulated device to write to
	 * @offset:	Byte offset within the device's configuration space
	 * @value:	Value to write
	 * @size:	Access size
	 * @return 0 if OK, -ve on error
	 */
	int (*write_config)(struct udevice *dev, uint offset, ulong value,
			    enum pci_size_t size);
	/**
	 * read_io() - Read a PCI I/O value
	 *
	 * @dev:	Emulated device to read from
	 * @addr:	I/O address to read
	 * @valuep:	Place to put the returned value
	 * @size:	Access size
	 * @return 0 if OK, -ENOENT if @addr is not mapped by this device,
	 *		other -ve value on error
	 */
	int (*read_io)(struct udevice *dev, unsigned int addr, ulong *valuep,
		       enum pci_size_t size);
	/**
	 * write_io() - Write a PCI I/O value
	 *
	 * @dev:	Emulated device to write from
	 * @addr:	I/O address to write
	 * @value:	Value to write
	 * @size:	Access size
	 * @return 0 if OK, -ENOENT if @addr is not mapped by this device,
	 *		other -ve value on error
	 */
	int (*write_io)(struct udevice *dev, unsigned int addr,
			ulong value, enum pci_size_t size);
	/**
	 * map_physmem() - Map a device into sandbox memory
	 *
	 * @dev:	Emulated device to map
	 * @addr:	Memory address, normally corresponding to a PCI BAR.
	 *		The device should have been configured to have a BAR
	 *		at this address.
	 * @lenp:	On entry, the size of the area to map, On exit it is
	 *		updated to the size actually mapped, which may be less
	 *		if the device has less space
	 * @ptrp:	Returns a pointer to the mapped address. The device's
	 *		space can be accessed as @lenp bytes starting here
	 * @return 0 if OK, -ENOENT if @addr is not mapped by this device,
	 *		other -ve value on error
	 */
	int (*map_physmem)(struct udevice *dev, phys_addr_t addr,
			   unsigned long *lenp, void **ptrp);
	/**
	 * unmap_physmem() - undo a memory mapping
	 *
	 * This must be called after map_physmem() to undo the mapping.
	 * Some devices can use this to check what has been written into
	 * their mapped memory and perform an operations they require on it.
	 * In this way, map/unmap can be used as a sort of handshake between
	 * the emulated device and its users.
	 *
	 * @dev:	Emuated device to unmap
	 * @vaddr:	Mapped memory address, as passed to map_physmem()
	 * @len:	Size of area mapped, as returned by map_physmem()
	 * @return 0 if OK, -ve on error
	 */
	int (*unmap_physmem)(struct udevice *dev, const void *vaddr,
			     unsigned long len);
};

/* Get access to a PCI device emulator's operations */
#define pci_get_emul_ops(dev)	((struct dm_pci_emul_ops *)(dev)->driver->ops)

/**
 * sandbox_pci_get_emul() - Get the emulation device for a PCI device
 *
 * Searches for a suitable emulator for the given PCI bus device
 *
 * @bus:	PCI bus to search
 * @find_devfn:	PCI device and function address (PCI_DEVFN())
 * @emulp:	Returns emulated device if found
 * @return 0 if found, -ENODEV if not found
 */
int sandbox_pci_get_emul(struct udevice *bus, pci_dev_t find_devfn,
			 struct udevice **emulp);

#endif

#endif /* __ASSEMBLY__ */
#endif /* _PCI_H */