pci: Correct a few comments and nits

[platform/kernel/u-boot.git] / 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

#define PCI_CFG_SPACE_SIZE      256
#define PCI_CFG_SPACE_EXP_SIZE  4096

/*
 * 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 */

#define PCI_INTERRUPT_LINE_DISABLE      0xff

/* 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

/* Extended Capabilities (PCI-X 2.0 and Express) */
#define PCI_EXT_CAP_ID(header)          (header & 0x0000ffff)
#define PCI_EXT_CAP_VER(header)         ((header >> 16) & 0xf)
#define PCI_EXT_CAP_NEXT(header)        ((header >> 20) & 0xffc)

#define PCI_EXT_CAP_ID_ERR      0x01    /* Advanced Error Reporting */
#define PCI_EXT_CAP_ID_VC       0x02    /* Virtual Channel Capability */
#define PCI_EXT_CAP_ID_DSN      0x03    /* Device Serial Number */
#define PCI_EXT_CAP_ID_PWR      0x04    /* Power Budgeting */
#define PCI_EXT_CAP_ID_RCLD     0x05    /* Root Complex Link Declaration */
#define PCI_EXT_CAP_ID_RCILC    0x06    /* Root Complex Internal Link Control */
#define PCI_EXT_CAP_ID_RCEC     0x07    /* Root Complex Event Collector */
#define PCI_EXT_CAP_ID_MFVC     0x08    /* Multi-Function VC Capability */
#define PCI_EXT_CAP_ID_VC9      0x09    /* same as _VC */
#define PCI_EXT_CAP_ID_RCRB     0x0A    /* Root Complex RB? */
#define PCI_EXT_CAP_ID_VNDR     0x0B    /* Vendor-Specific */
#define PCI_EXT_CAP_ID_CAC      0x0C    /* Config Access - obsolete */
#define PCI_EXT_CAP_ID_ACS      0x0D    /* Access Control Services */
#define PCI_EXT_CAP_ID_ARI      0x0E    /* Alternate Routing ID */
#define PCI_EXT_CAP_ID_ATS      0x0F    /* Address Translation Services */
#define PCI_EXT_CAP_ID_SRIOV    0x10    /* Single Root I/O Virtualization */
#define PCI_EXT_CAP_ID_MRIOV    0x11    /* Multi Root I/O Virtualization */
#define PCI_EXT_CAP_ID_MCAST    0x12    /* Multicast */
#define PCI_EXT_CAP_ID_PRI      0x13    /* Page Request Interface */
#define PCI_EXT_CAP_ID_AMD_XXX  0x14    /* Reserved for AMD */
#define PCI_EXT_CAP_ID_REBAR    0x15    /* Resizable BAR */
#define PCI_EXT_CAP_ID_DPA      0x16    /* Dynamic Power Allocation */
#define PCI_EXT_CAP_ID_TPH      0x17    /* TPH Requester */
#define PCI_EXT_CAP_ID_LTR      0x18    /* Latency Tolerance Reporting */
#define PCI_EXT_CAP_ID_SECPCI   0x19    /* Secondary PCIe Capability */
#define PCI_EXT_CAP_ID_PMUX     0x1A    /* Protocol Multiplexing */
#define PCI_EXT_CAP_ID_PASID    0x1B    /* Process Address Space ID */

/* 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 */
        unsigned int subvendor, subdevice; /* Subsystem ID's or PCI_ANY_ID */
        unsigned int class, class_mask; /* (class,subclass,prog-if) triplet */
        unsigned long driver_data;      /* Data private to the driver */
};

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)
 *
 * With driver model this is dev_get_uclass_priv(bus)
 */
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

#if !defined(CONFIG_DM_PCI) || defined(CONFIG_DM_PCI_COMPAT)
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))

/* For driver model these are defined in macros in pci_compat.c */
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);
#endif

#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

void pciauto_region_init(struct pci_region *res);
void pciauto_region_align(struct pci_region *res, pci_size_t size);
void pciauto_config_init(struct pci_controller *hose);
int pciauto_region_allocate(struct pci_region *res, pci_size_t size,
                            pci_addr_t *bar);

#if !defined(CONFIG_DM_PCI) || defined(CONFIG_DM_PCI_COMPAT)
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_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 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);

int pci_find_next_ext_capability(struct pci_controller *hose,
                                 pci_dev_t dev, int start, int cap);
int pci_hose_find_ext_capability(struct pci_controller *hose,
                                 pci_dev_t dev, 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
#endif /* !defined(CONFIG_DM_PCI) || defined(CONFIG_DM_PCI_COMPAT) */

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

#if !defined(CONFIG_DM_PCI) || defined(CONFIG_DM_PCI_COMPAT)
/**
 * pci_write_bar32() - Write the address of a BAR including control bits
 *
 * This writes a raw address (with control bits) to a bar. This can be used
 * with devices which require hard-coded addresses, not part of the normal
 * PCI enumeration process.
 *
 * @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);

/**
 * 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);

/**
 * 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);
#endif /* !CONFIG_DM_PCI || CONFIG_DM_PCI_COMPAT */

/* 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_parent_priv(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)

/**
 * dm_pci_get_bdf() - Get the BDF value for a device
 *
 * @dev:        Device to check
 * @return bus/device/function value (see PCI_BDF())
 */
pci_dev_t dm_pci_get_bdf(struct udevice *dev);

/**
 * 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);

/**
 * dm_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 dm_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_find_first_device() - return the first available PCI device
 *
 * This function and pci_find_first_device() allow iteration through all
 * available PCI devices on all buses. Assuming there are any, this will
 * return the first one.
 *
 * @devp:       Set to the first available device, or NULL if no more are left
 *              or we got an error
 * @return 0 if all is OK, -ve on error (e.g. a bus/bridge failed to probe)
 */
int pci_find_first_device(struct udevice **devp);

/**
 * pci_find_next_device() - return the next available PCI device
 *
 * Finds the next available PCI device after the one supplied, or sets @devp
 * to NULL if there are no more.
 *
 * @devp:       On entry, the last device returned. Set to the next available
 *              device, or NULL if no more are left or we got an error
 * @return 0 if all is OK, -ve on error (e.g. a bus/bridge failed to probe)
 */
int pci_find_next_device(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 udevice *bus);

/**
 * 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()
 * @offset:     Register offset to read
 * @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()
 * @offset:     Register offset to write
 * @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);

/**
 * pci_bus_clrset_config32() - Update a configuration value for a device
 *
 * The register at @offset is updated to (oldvalue & ~clr) | set.
 *
 * @bus:        Bus to access
 * @bdf:        PCI device address: bus, device and function -see PCI_BDF()
 * @offset:     Register offset to update
 * @clr:        Bits to clear
 * @set:        Bits to set
 * @return 0 if OK, -ve on error
 */
int pci_bus_clrset_config32(struct udevice *bus, pci_dev_t bdf, int offset,
                            u32 clr, u32 set);

/**
 * Driver model PCI config access functions. Use these in preference to others
 * when you have a valid device
 */
int dm_pci_read_config(struct udevice *dev, int offset, unsigned long *valuep,
                       enum pci_size_t size);

int dm_pci_read_config8(struct udevice *dev, int offset, u8 *valuep);
int dm_pci_read_config16(struct udevice *dev, int offset, u16 *valuep);
int dm_pci_read_config32(struct udevice *dev, int offset, u32 *valuep);

int dm_pci_write_config(struct udevice *dev, int offset, unsigned long value,
                        enum pci_size_t size);

int dm_pci_write_config8(struct udevice *dev, int offset, u8 value);
int dm_pci_write_config16(struct udevice *dev, int offset, u16 value);
int dm_pci_write_config32(struct udevice *dev, int offset, u32 value);

/**
 * These permit convenient read/modify/write on PCI configuration. The
 * register is updated to (oldvalue & ~clr) | set.
 */
int dm_pci_clrset_config8(struct udevice *dev, int offset, u32 clr, u32 set);
int dm_pci_clrset_config16(struct udevice *dev, int offset, u32 clr, u32 set);
int dm_pci_clrset_config32(struct udevice *dev, int offset, u32 clr, u32 set);

/*
 * 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);
int pci_write_config16(pci_dev_t pcidev, int offset, u16 value);
int pci_write_config8(pci_dev_t pcidev, int offset, u8 value);
int pci_read_config32(pci_dev_t pcidev, int offset, u32 *valuep);
int pci_read_config16(pci_dev_t pcidev, int offset, u16 *valuep);
int pci_read_config8(pci_dev_t pcidev, int offset, u8 *valuep);

#ifdef CONFIG_DM_PCI_COMPAT
/* 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);
}

/* 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);
}

/* 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);
}

/* 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);
}

/* 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);
}

/* 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);
}
#endif /* CONFIG_DM_PCI_COMPAT */

/**
 * dm_pciauto_config_device() - configure a device ready for use
 *
 * 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.
 *
 * @dev:        Device to configure
 * @return 0 if OK, -ve on error
 */
int dm_pciauto_config_device(struct udevice *dev);

/**
 * pci_conv_32_to_size() - convert a 32-bit read value to the given size
 *
 * Some PCI buses must always perform 32-bit reads. The data must then be
 * shifted and masked to reflect the required access size and offset. This
 * function performs this transformation.
 *
 * @value:      Value to transform (32-bit value read from @offset & ~3)
 * @offset:     Register offset that was read
 * @size:       Required size of the result
 * @return the value that would have been obtained if the read had been
 * performed at the given offset with the correct size
 */
ulong pci_conv_32_to_size(ulong value, uint offset, enum pci_size_t size);

/**
 * pci_conv_size_to_32() - update a 32-bit value to prepare for a write
 *
 * Some PCI buses must always perform 32-bit writes. To emulate a smaller
 * write the old 32-bit data must be read, updated with the required new data
 * and written back as a 32-bit value. This function performs the
 * transformation from the old value to the new value.
 *
 * @value:      Value to transform (32-bit value read from @offset & ~3)
 * @offset:     Register offset that should be written
 * @size:       Required size of the write
 * @return the value that should be written as a 32-bit access to @offset & ~3.
 */
ulong pci_conv_size_to_32(ulong old, ulong value, uint offset,
                          enum pci_size_t size);

/**
 * pci_get_controller() - obtain the controller to use for a bus
 *
 * @dev:        Device to check
 * @return pointer to the controller device for this bus
 */
struct udevice *pci_get_controller(struct udevice *dev);

/**
 * pci_get_regions() - obtain pointers to all the region types
 *
 * @dev:        Device to check
 * @iop:        Returns a pointer to the I/O region, or NULL if none
 * @memp:       Returns a pointer to the memory region, or NULL if none
 * @prefp:      Returns a pointer to the pre-fetch region, or NULL if none
 * @return the number of non-NULL regions returned, normally 3
 */
int pci_get_regions(struct udevice *dev, struct pci_region **iop,
                    struct pci_region **memp, struct pci_region **prefp);

/**
 * dm_pci_write_bar32() - Write the address of a BAR
 *
 * This writes a raw address to a bar
 *
 * @dev:        PCI device to update
 * @barnum:     BAR number (0-5)
 * @addr:       BAR address
 */
void dm_pci_write_bar32(struct udevice *dev, int barnum, u32 addr);

/**
 * dm_pci_read_bar32() - read a base address register from a device
 *
 * @dev:        Device to check
 * @barnum:     Bar number to read (numbered from 0)
 * @return: value of BAR
 */
u32 dm_pci_read_bar32(struct udevice *dev, int barnum);

/**
 * dm_pci_bus_to_phys() - convert a PCI bus address to a physical address
 *
 * @dev:        Device containing the PCI address
 * @addr:       PCI address to convert
 * @flags:      Flags for the region type (PCI_REGION_...)
 * @return physical address corresponding to that PCI bus address
 */
phys_addr_t dm_pci_bus_to_phys(struct udevice *dev, pci_addr_t addr,
                               unsigned long flags);

/**
 * dm_pci_phys_to_bus() - convert a physical address to a PCI bus address
 *
 * @dev:        Device containing the bus address
 * @addr:       Physical address to convert
 * @flags:      Flags for the region type (PCI_REGION_...)
 * @return PCI bus address corresponding to that physical address
 */
pci_addr_t dm_pci_phys_to_bus(struct udevice *dev, phys_addr_t addr,
                              unsigned long flags);

/**
 * dm_pci_map_bar() - get a virtual address associated with a BAR region
 *
 * Looks up a base address register and finds the physical memory address
 * that corresponds to it
 *
 * @dev:        Device to check
 * @bar:        Bar number to read (numbered from 0)
 * @flags:      Flags for the region type (PCI_REGION_...)
 * @return: pointer to the virtual address to use
 */
void *dm_pci_map_bar(struct udevice *dev, int bar, int flags);

#define dm_pci_virt_to_bus(dev, addr, flags) \
        dm_pci_phys_to_bus(dev, (virt_to_phys(addr)), (flags))
#define dm_pci_bus_to_virt(dev, addr, flags, len, map_flags) \
        map_physmem(dm_pci_bus_to_phys(dev, (addr), (flags)), \
                    (len), (map_flags))

#define dm_pci_phys_to_mem(dev, addr) \
        dm_pci_phys_to_bus((dev), (addr), PCI_REGION_MEM)
#define dm_pci_mem_to_phys(dev, addr) \
        dm_pci_bus_to_phys((dev), (addr), PCI_REGION_MEM)
#define dm_pci_phys_to_io(dev, addr) \
        dm_pci_phys_to_bus((dev), (addr), PCI_REGION_IO)
#define dm_pci_io_to_phys(dev, addr) \
        dm_pci_bus_to_phys((dev), (addr), PCI_REGION_IO)

#define dm_pci_virt_to_mem(dev, addr) \
        dm_pci_virt_to_bus((dev), (addr), PCI_REGION_MEM)
#define dm_pci_mem_to_virt(dev, addr, len, map_flags) \
        dm_pci_bus_to_virt((dev), (addr), PCI_REGION_MEM, (len), (map_flags))
#define dm_pci_virt_to_io(dev, addr) \
        dm_pci_virt_to_bus((dev), (addr), PCI_REGION_IO)
#define dm_pci_io_to_virt(dev, addr, len, map_flags) \
        dm_pci_bus_to_virt((dev), (addr), PCI_REGION_IO, (len), (map_flags))

/**
 * dm_pci_find_device() - find a device by vendor/device ID
 *
 * @vendor:     Vendor ID
 * @device:     Device ID
 * @index:      0 to find the first match, 1 for second, etc.
 * @devp:       Returns pointer to the device, if found
 * @return 0 if found, -ve on error
 */
int dm_pci_find_device(unsigned int vendor, unsigned int device, int index,
                       struct udevice **devp);

/**
 * dm_pci_find_class() - find a device by class
 *
 * @find_class: 3-byte (24-bit) class value to find
 * @index:      0 to find the first match, 1 for second, etc.
 * @devp:       Returns pointer to the device, if found
 * @return 0 if found, -ve on error
 */
int dm_pci_find_class(uint find_class, int index, struct udevice **devp);

/**
 * 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 /* CONFIG_DM_PCI */

/**
 * PCI_DEVICE - macro used to describe a specific pci device
 * @vend: the 16 bit PCI Vendor ID
 * @dev: the 16 bit PCI Device ID
 *
 * This macro is used to create a struct pci_device_id that matches a
 * specific device.  The subvendor and subdevice fields will be set to
 * PCI_ANY_ID.
 */
#define PCI_DEVICE(vend, dev) \
        .vendor = (vend), .device = (dev), \
        .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID

/**
 * PCI_DEVICE_SUB - macro used to describe a specific pci device with subsystem
 * @vend: the 16 bit PCI Vendor ID
 * @dev: the 16 bit PCI Device ID
 * @subvend: the 16 bit PCI Subvendor ID
 * @subdev: the 16 bit PCI Subdevice ID
 *
 * This macro is used to create a struct pci_device_id that matches a
 * specific device with subsystem information.
 */
#define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
        .vendor = (vend), .device = (dev), \
        .subvendor = (subvend), .subdevice = (subdev)

/**
 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
 * @dev_class: the class, subclass, prog-if triple for this device
 * @dev_class_mask: the class mask for this device
 *
 * This macro is used to create a struct pci_device_id that matches a
 * specific PCI class.  The vendor, device, subvendor, and subdevice
 * fields will be set to PCI_ANY_ID.
 */
#define PCI_DEVICE_CLASS(dev_class, dev_class_mask) \
        .class = (dev_class), .class_mask = (dev_class_mask), \
        .vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
        .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID

/**
 * PCI_VDEVICE - macro used to describe a specific pci device in short form
 * @vend: the vendor name
 * @dev: the 16 bit PCI Device ID
 *
 * This macro is used to create a struct pci_device_id that matches a
 * specific PCI device.  The subvendor, and subdevice fields will be set
 * to PCI_ANY_ID. The macro allows the next field to follow as the device
 * private data.
 */

#define PCI_VDEVICE(vend, dev) \
        .vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
        .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0

/**
 * struct pci_driver_entry - Matches a driver to its pci_device_id list
 * @driver: Driver to use
 * @match: List of match records for this driver, terminated by {}
 */
struct pci_driver_entry {
        struct driver *driver;
        const struct pci_device_id *match;
};

#define U_BOOT_PCI_DEVICE(__name, __match)                              \
        ll_entry_declare(struct pci_driver_entry, __name, pci_driver_entry) = {\
                .driver = llsym(struct driver, __name, driver), \
                .match = __match, \
                }

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