/*
 * Copyright (c) 1997, 1998
 *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD: src/sys/pci/if_vrreg.h,v 1.7.2.5 2003/02/06 04:46:20 silby Exp $
 * $DragonFly: src/sys/dev/netif/vr/if_vrreg.h,v 1.10 2007/09/09 03:51:25 sephe Exp $
 */

/*
 * Rhine register definitions.
 */

#define VR_PAR0                 0x00    /* node address 0 to 4 */
#define VR_PAR1                 0x04    /* node address 2 to 6 */
#define VR_RXCFG                0x06    /* receiver config register */
#define VR_TXCFG                0x07    /* transmit config register */
#define VR_COMMAND              0x08    /* command register */
#define VR_ISR                  0x0C    /* interrupt/status register */
#define VR_IMR                  0x0E    /* interrupt mask register */
#define VR_MAR0                 0x10    /* multicast hash 0 */
#define VR_MAR1                 0x14    /* multicast hash 1 */
#define VR_RXADDR               0x18    /* rx descriptor list start addr */
#define VR_TXADDR               0x1C    /* tx descriptor list start addr */
#define VR_CURRXDESC0           0x20
#define VR_CURRXDESC1           0x24
#define VR_CURRXDESC2           0x28
#define VR_CURRXDESC3           0x2C
#define VR_NEXTRXDESC0          0x30
#define VR_NEXTRXDESC1          0x34
#define VR_NEXTRXDESC2          0x38
#define VR_NEXTRXDESC3          0x3C
#define VR_CURTXDESC0           0x40
#define VR_CURTXDESC1           0x44
#define VR_CURTXDESC2           0x48
#define VR_CURTXDESC3           0x4C
#define VR_NEXTTXDESC0          0x50
#define VR_NEXTTXDESC1          0x54
#define VR_NEXTTXDESC2          0x58
#define VR_NEXTTXDESC3          0x5C
#define VR_CURRXDMA             0x60    /* current RX DMA address */
#define VR_CURTXDMA             0x64    /* current TX DMA address */
#define VR_TALLYCNT             0x68    /* tally counter test register */
#define VR_PHYADDR              0x6C
#define VR_MIISTAT              0x6D
#define VR_BCR0                 0x6E
#define VR_BCR1                 0x6F
#define VR_MIICMD               0x70
#define VR_MIIADDR              0x71
#define VR_MIIDATA              0x72
#define VR_EECSR                0x74
#define VR_TEST                 0x75
#define VR_GPIO                 0x76
#define VR_CONFIG               0x78
#define VR_MPA_CNT              0x7C
#define VR_CRC_CNT              0x7E
#define VR_STICKHW              0x83

/* Misc Registers */
#define VR_MISC_CR1             0x81
#define VR_MISCCR1_FORSRST      0x40

/*
 * RX config bits.
 */
#define VR_RXCFG_RX_ERRPKTS     0x01
#define VR_RXCFG_RX_RUNT        0x02
#define VR_RXCFG_RX_MULTI       0x04
#define VR_RXCFG_RX_BROAD       0x08
#define VR_RXCFG_RX_PROMISC     0x10
#define VR_RXCFG_RX_THRESH      0xE0

#define VR_RXTHRESH_32BYTES     0x00
#define VR_RXTHRESH_64BYTES     0x20
#define VR_RXTHRESH_128BYTES    0x40
#define VR_RXTHRESH_256BYTES    0x60
#define VR_RXTHRESH_512BYTES    0x80
#define VR_RXTHRESH_768BYTES    0xA0
#define VR_RXTHRESH_1024BYTES   0xC0
#define VR_RXTHRESH_STORENFWD   0xE0

/*
 * TX config bits.
 */
#define VR_TXCFG_RSVD0          0x01
#define VR_TXCFG_LOOPBKMODE     0x06
#define VR_TXCFG_BACKOFF        0x08
#define VR_TXCFG_RSVD1          0x10
#define VR_TXCFG_TX_THRESH      0xE0

#define VR_TXTHRESH_32BYTES     0x00
#define VR_TXTHRESH_64BYTES     0x20
#define VR_TXTHRESH_128BYTES    0x40
#define VR_TXTHRESH_256BYTES    0x60
#define VR_TXTHRESH_512BYTES    0x80
#define VR_TXTHRESH_768BYTES    0xA0
#define VR_TXTHRESH_1024BYTES   0xC0
#define VR_TXTHRESH_STORENFWD   0xE0

/*
 * Command register bits.
 */
#define VR_CMD_INIT             0x0001
#define VR_CMD_START            0x0002
#define VR_CMD_STOP             0x0004
#define VR_CMD_RX_ON            0x0008
#define VR_CMD_TX_ON            0x0010
#define VR_CMD_TX_GO            0x0020
#define VR_CMD_RX_GO            0x0040
#define VR_CMD_RSVD             0x0080
#define VR_CMD_RX_EARLY         0x0100
#define VR_CMD_TX_EARLY         0x0200
#define VR_CMD_FULLDUPLEX       0x0400
#define VR_CMD_TX_NOPOLL        0x0800

#define VR_CMD_RESET            0x8000

/*
 * Interrupt status bits.
 */
#define VR_ISR_RX_OK            0x0001  /* packet rx ok */
#define VR_ISR_TX_OK            0x0002  /* packet tx ok */
#define VR_ISR_RX_ERR           0x0004  /* packet rx with err */
#define VR_ISR_TX_ABRT          0x0008  /* tx aborted due to excess colls */
#define VR_ISR_TX_UNDERRUN      0x0010  /* tx buffer underflow */
#define VR_ISR_RX_NOBUF         0x0020  /* no rx buffer available */
#define VR_ISR_BUSERR           0x0040  /* PCI bus error */
#define VR_ISR_STATSOFLOW       0x0080  /* stats counter oflow */
#define VR_ISR_RX_EARLY         0x0100  /* rx early */
#define VR_ISR_LINKSTAT         0x0200  /* MII status change */
#define VR_ISR_ETI              0x0200  /* Tx early (3043/3071) */
#define VR_ISR_UDFI             0x0200  /* Tx FIFO underflow (3065) */
#define VR_ISR_RX_OFLOW         0x0400  /* rx FIFO overflow */
#define VR_ISR_RX_DROPPED       0x0800
#define VR_ISR_RX_NOBUF2        0x1000
#define VR_ISR_TX_ABRT2         0x2000
#define VR_ISR_LINKSTAT2        0x4000
#define VR_ISR_MAGICPACKET      0x8000

/*
 * Interrupt mask bits.
 */
#define VR_IMR_RX_OK            0x0001  /* packet rx ok */
#define VR_IMR_TX_OK            0x0002  /* packet tx ok */
#define VR_IMR_RX_ERR           0x0004  /* packet rx with err */
#define VR_IMR_TX_ABRT          0x0008  /* tx aborted due to excess colls */
#define VR_IMR_TX_UNDERRUN      0x0010  /* tx buffer underflow */
#define VR_IMR_RX_NOBUF         0x0020  /* no rx buffer available */
#define VR_IMR_BUSERR           0x0040  /* PCI bus error */
#define VR_IMR_STATSOFLOW       0x0080  /* stats counter oflow */
#define VR_IMR_RX_EARLY         0x0100  /* rx early */
#define VR_IMR_LINKSTAT         0x0200  /* MII status change */
#define VR_IMR_RX_OFLOW         0x0400  /* rx FIFO overflow */
#define VR_IMR_RX_DROPPED       0x0800
#define VR_IMR_RX_NOBUF2        0x1000
#define VR_IMR_TX_ABRT2         0x2000
#define VR_IMR_LINKSTAT2        0x4000
#define VR_IMR_MAGICPACKET      0x8000

#define VR_INTRS                                                        \
        (VR_IMR_RX_OK|VR_IMR_TX_OK|VR_IMR_RX_NOBUF|                     \
        VR_IMR_TX_ABRT|VR_IMR_TX_UNDERRUN|VR_IMR_BUSERR|                \
        VR_IMR_RX_ERR|VR_ISR_RX_DROPPED)

/*
 * MII status register.
 */

#define VR_MIISTAT_SPEED        0x01
#define VR_MIISTAT_LINKFAULT    0x02
#define VR_MIISTAT_MGTREADERR   0x04
#define VR_MIISTAT_MIIERR       0x08
#define VR_MIISTAT_PHYOPT       0x10
#define VR_MIISTAT_MDC_SPEED    0x20
#define VR_MIISTAT_RSVD         0x40
#define VR_MIISTAT_GPIO1POLL    0x80

/*
 * MII command register bits.
 */
#define VR_MIICMD_CLK           0x01
#define VR_MIICMD_DATAOUT       0x02
#define VR_MIICMD_DATAIN        0x04
#define VR_MIICMD_DIR           0x08
#define VR_MIICMD_DIRECTPGM     0x10
#define VR_MIICMD_WRITE_ENB     0x20
#define VR_MIICMD_READ_ENB      0x40
#define VR_MIICMD_AUTOPOLL      0x80

/*
 * EEPROM control bits.
 */
#define VR_EECSR_DATAIN         0x01    /* data out */
#define VR_EECSR_DATAOUT        0x02    /* data in */
#define VR_EECSR_CLK            0x04    /* clock */
#define VR_EECSR_CS             0x08    /* chip select */
#define VR_EECSR_DPM            0x10
#define VR_EECSR_LOAD           0x20
#define VR_EECSR_EMBP           0x40
#define VR_EECSR_EEPR           0x80

#define VR_EECMD_WRITE          0x140
#define VR_EECMD_READ           0x180
#define VR_EECMD_ERASE          0x1c0

/*
 * Test register bits.
 */
#define VR_TEST_TEST0           0x01
#define VR_TEST_TEST1           0x02
#define VR_TEST_TEST2           0x04
#define VR_TEST_TSTUD           0x08
#define VR_TEST_TSTOV           0x10
#define VR_TEST_BKOFF           0x20
#define VR_TEST_FCOL            0x40
#define VR_TEST_HBDES           0x80

/*
 * Config register bits.
 */
#define VR_CFG_GPIO2OUTENB      0x00000001
#define VR_CFG_GPIO2OUT         0x00000002      /* gen. purp. pin */
#define VR_CFG_GPIO2IN          0x00000004      /* gen. purp. pin */
#define VR_CFG_AUTOOPT          0x00000008      /* enable rx/tx autopoll */
#define VR_CFG_MIIOPT           0x00000010
#define VR_CFG_MMIENB           0x00000020      /* memory mapped mode enb */
#define VR_CFG_JUMPER           0x00000040      /* PHY and oper. mode select */
#define VR_CFG_EELOAD           0x00000080      /* enable EEPROM programming */
#define VR_CFG_LATMENB          0x00000100      /* larency timer effect enb. */
#define VR_CFG_MRREADWAIT       0x00000200
#define VR_CFG_MRWRITEWAIT      0x00000400
#define VR_CFG_RX_ARB           0x00000800
#define VR_CFG_TX_ARB           0x00001000
#define VR_CFG_READMULTI        0x00002000
#define VR_CFG_TX_PACE          0x00004000
#define VR_CFG_TX_QDIS          0x00008000
#define VR_CFG_ROMSEL0          0x00010000
#define VR_CFG_ROMSEL1          0x00020000
#define VR_CFG_ROMSEL2          0x00040000
#define VR_CFG_ROMTIMESEL       0x00080000
#define VR_CFG_RSVD0            0x00100000
#define VR_CFG_ROMDLY           0x00200000
#define VR_CFG_ROMOPT           0x00400000
#define VR_CFG_RSVD1            0x00800000
#define VR_CFG_BACKOFFOPT       0x01000000
#define VR_CFG_BACKOFFMOD       0x02000000
#define VR_CFG_CAPEFFECT        0x04000000
#define VR_CFG_BACKOFFRAND      0x08000000
#define VR_CFG_MAGICKPACKET     0x10000000
#define VR_CFG_PCIREADLINE      0x20000000
#define VR_CFG_DIAG             0x40000000
#define VR_CFG_GPIOEN           0x80000000

/* Sticky HW bits */
#define VR_STICKHW_DS0          0x01
#define VR_STICKHW_DS1          0x02
#define VR_STICKHW_WOL_ENB      0x04
#define VR_STICKHW_WOL_STS      0x08
#define VR_STICKHW_LEGWOL_ENB   0x80

/*
 * BCR0 register bits. (At least for the VT6102 chip.)
 */
#define VR_BCR0_DMA_LENGTH      0x07

#define VR_BCR0_DMA_32BYTES     0x00
#define VR_BCR0_DMA_64BYTES     0x01
#define VR_BCR0_DMA_128BYTES    0x02
#define VR_BCR0_DMA_256BYTES    0x03
#define VR_BCR0_DMA_512BYTES    0x04
#define VR_BCR0_DMA_1024BYTES   0x05
#define VR_BCR0_DMA_STORENFWD   0x07

#define VR_BCR0_RX_THRESH       0x38

#define VR_BCR0_RXTHRESHCFG     0x00
#define VR_BCR0_RXTHRESH64BYTES 0x08
#define VR_BCR0_RXTHRESH128BYTES 0x10
#define VR_BCR0_RXTHRESH256BYTES 0x18
#define VR_BCR0_RXTHRESH512BYTES 0x20
#define VR_BCR0_RXTHRESH1024BYTES 0x28
#define VR_BCR0_RXTHRESHSTORENFWD 0x38
#define VR_BCR0_EXTLED          0x40
#define VR_BCR0_MED2            0x80

/*
 * BCR1 register bits. (At least for the VT6102 chip.)
 */
#define VR_BCR1_POT0            0x01
#define VR_BCR1_POT1            0x02
#define VR_BCR1_POT2            0x04
#define VR_BCR1_TX_THRESH       0x38
#define VR_BCR1_TXTHRESHCFG     0x00
#define VR_BCR1_TXTHRESH64BYTES 0x08
#define VR_BCR1_TXTHRESH128BYTES 0x10
#define VR_BCR1_TXTHRESH256BYTES 0x18
#define VR_BCR1_TXTHRESH512BYTES 0x20
#define VR_BCR1_TXTHRESH1024BYTES 0x28
#define VR_BCR1_TXTHRESHSTORENFWD 0x38

/*
 * Rhine TX/RX list structure.
 */

struct vr_desc {
        uint32_t                vr_status;
        uint32_t                vr_ctl;
        uint32_t                vr_ptr1;
        uint32_t                vr_ptr2;
};

#define vr_data         vr_ptr1
#define vr_next         vr_ptr2


#define VR_RXSTAT_RXERR         0x00000001
#define VR_RXSTAT_CRCERR        0x00000002
#define VR_RXSTAT_FRAMEALIGNERR 0x00000004
#define VR_RXSTAT_FIFOOFLOW     0x00000008
#define VR_RXSTAT_GIANT         0x00000010
#define VR_RXSTAT_RUNT          0x00000020
#define VR_RXSTAT_BUSERR        0x00000040
#define VR_RXSTAT_BUFFERR       0x00000080
#define VR_RXSTAT_LASTFRAG      0x00000100
#define VR_RXSTAT_FIRSTFRAG     0x00000200
#define VR_RXSTAT_RLINK         0x00000400
#define VR_RXSTAT_RX_PHYS       0x00000800
#define VR_RXSTAT_RX_BROAD      0x00001000
#define VR_RXSTAT_RX_MULTI      0x00002000
#define VR_RXSTAT_RX_OK         0x00004000
#define VR_RXSTAT_RXLEN         0x07FF0000
#define VR_RXSTAT_RXLEN_EXT     0x78000000
#define VR_RXSTAT_OWN           0x80000000

#define VR_RXBYTES(x)           ((x & VR_RXSTAT_RXLEN) >> 16)
#define VR_RXSTAT (VR_RXSTAT_FIRSTFRAG|VR_RXSTAT_LASTFRAG|VR_RXSTAT_OWN)

#define VR_RXCTL_BUFLEN         0x000007FF
#define VR_RXCTL_BUFLEN_EXT     0x00007800
#define VR_RXCTL_CHAIN          0x00008000
#define VR_RXCTL_RX_INTR        0x00800000

#define VR_RXCTL (VR_RXCTL_CHAIN|VR_RXCTL_RX_INTR)

#define VR_TXSTAT_DEFER         0x00000001
#define VR_TXSTAT_UNDERRUN      0x00000002
#define VR_TXSTAT_COLLCNT       0x00000078
#define VR_TXSTAT_SQE           0x00000080
#define VR_TXSTAT_ABRT          0x00000100
#define VR_TXSTAT_LATECOLL      0x00000200
#define VR_TXSTAT_CARRLOST      0x00000400
#define VR_TXSTAT_UDF           0x00000800
#define VR_TXSTAT_BUSERR        0x00002000
#define VR_TXSTAT_JABTIMEO      0x00004000
#define VR_TXSTAT_ERRSUM        0x00008000
#define VR_TXSTAT_OWN           0x80000000

#define VR_TXCTL_BUFLEN         0x000007FF
#define VR_TXCTL_BUFLEN_EXT     0x00007800
#define VR_TXCTL_TLINK          0x00008000
#define VR_TXCTL_FIRSTFRAG      0x00200000
#define VR_TXCTL_LASTFRAG       0x00400000
#define VR_TXCTL_FINT           0x00800000


#define VR_MAXFRAGS             16
#define VR_RX_LIST_CNT          256
#define VR_TX_LIST_CNT          128
#define VR_MIN_FRAMELEN         60
#define VR_FRAMELEN             1536
#define VR_RXLEN                1520

#define VR_TXOWN(x)             x->vr_ptr->vr_status

#define VR_TX_BUF_SIZE          (VR_TX_LIST_CNT * MCLBYTES)
#define VR_TX_BUF(sc, i)        ((sc)->vr_cdata.vr_tx_buf + ((i) * MCLBYTES))

struct vr_list_data {
        struct vr_desc          vr_rx_list[VR_RX_LIST_CNT];
        struct vr_desc          vr_tx_list[VR_TX_LIST_CNT];
};

struct vr_chain {
        struct vr_desc          *vr_ptr;
        void                    *vr_buf;
        vm_paddr_t               vr_buf_paddr;
        vm_paddr_t               vr_next_desc_paddr;
        int                      vr_next_idx;
};

struct vr_chain_onefrag {
        struct vr_desc          *vr_ptr;
        struct mbuf             *vr_mbuf;
        struct vr_chain_onefrag *vr_nextdesc;
};

struct vr_chain_data {
        struct vr_chain_onefrag  vr_rx_chain[VR_RX_LIST_CNT];
        struct vr_chain          vr_tx_chain[VR_TX_LIST_CNT];

        struct vr_chain_onefrag *vr_rx_head;

        int                      vr_tx_head_idx;
        int                      vr_tx_tail_idx;
        int                      vr_tx_free_idx;
        caddr_t                  vr_tx_buf;     /* Pointer arith is needed. */
};

struct vr_type {
        uint16_t                vr_vid;
        uint16_t                vr_did;
        char                    *vr_name;
};

struct vr_mii_frame {
        uint8_t                 mii_stdelim;
        uint8_t                 mii_opcode;
        uint8_t                 mii_phyaddr;
        uint8_t                 mii_regaddr;
        uint8_t                 mii_turnaround;
        uint16_t                mii_data;
};

/*
 * MII constants
 */
#define VR_MII_STARTDELIM       0x01
#define VR_MII_READOP           0x02
#define VR_MII_WRITEOP          0x01
#define VR_MII_TURNAROUND       0x02

#define VR_FLAG_FORCEDELAY      1
#define VR_FLAG_SCHEDDELAY      2
#define VR_FLAG_DELAYTIMEO      3       

struct vr_softc {
        struct arpcom           arpcom;         /* interface info */
        bus_space_handle_t      vr_bhandle;     /* bus space handle */
        bus_space_tag_t         vr_btag;        /* bus space tag */
        struct resource         *vr_res;
        struct resource         *vr_irq;
        void                    *vr_intrhand;
        device_t                vr_miibus;
        uint8_t                 vr_revid;       /* Rhine chip revision */
        uint8_t                 vr_flags;       /* See VR_F_* below */
        struct ifpoll_compat    vr_npoll;
        struct vr_list_data     *vr_ldata;
        struct vr_chain_data    vr_cdata;
        struct callout          vr_stat_timer;
};

#define VR_F_RESTART            0x01            /* Restart unit on next tick */

/*
 * register space access macros
 */
#define CSR_WRITE_4(sc, reg, val)       \
        bus_space_write_4(sc->vr_btag, sc->vr_bhandle, reg, val)
#define CSR_WRITE_2(sc, reg, val)       \
        bus_space_write_2(sc->vr_btag, sc->vr_bhandle, reg, val)
#define CSR_WRITE_1(sc, reg, val)       \
        bus_space_write_1(sc->vr_btag, sc->vr_bhandle, reg, val)

#define CSR_READ_4(sc, reg)             \
        bus_space_read_4(sc->vr_btag, sc->vr_bhandle, reg)
#define CSR_READ_2(sc, reg)             \
        bus_space_read_2(sc->vr_btag, sc->vr_bhandle, reg)
#define CSR_READ_1(sc, reg)             \
        bus_space_read_1(sc->vr_btag, sc->vr_bhandle, reg)

#define VR_TIMEOUT              1000
#define ETHER_ALIGN             2

/*
 * General constants that are fun to know.
 *
 * VIA Rhine revision IDs
 */

#define REV_ID_VT3043_E                 0x04
#define REV_ID_VT3071_A                 0x20
#define REV_ID_VT3071_B                 0x21
#define REV_ID_VT3065_A                 0x40
#define REV_ID_VT3065_B                 0x41
#define REV_ID_VT3065_C                 0x42
#define REV_ID_VT6102_APOLLO            0x74
#define REV_ID_VT3106                   0x80
#define REV_ID_VT3106_J                 0x80    /* 0x80-0x8F */
#define REV_ID_VT3106_S                 0x90    /* 0x90-0xA0 */

/*
 * PCI low memory base and low I/O base register, and
 * other PCI registers.
 */

#define VR_PCI_VENDOR_ID        0x00
#define VR_PCI_DEVICE_ID        0x02
#define VR_PCI_COMMAND          0x04
#define VR_PCI_STATUS           0x06
#define VR_PCI_REVID            0x08
#define VR_PCI_CLASSCODE        0x09
#define VR_PCI_LATENCY_TIMER    0x0D
#define VR_PCI_HEADER_TYPE      0x0E
#define VR_PCI_LOIO             0x10
#define VR_PCI_LOMEM            0x14
#define VR_PCI_BIOSROM          0x30
#define VR_PCI_INTLINE          0x3C
#define VR_PCI_INTPIN           0x3D
#define VR_PCI_MINGNT           0x3E
#define VR_PCI_MINLAT           0x0F
#define VR_PCI_RESETOPT         0x48
#define VR_PCI_EEPROM_DATA      0x4C
#define VR_PCI_MODE             0x50

#define VR_MODE3_MIION          0x04

/* power management registers */
#define VR_PCI_CAPID            0xDC /* 8 bits */
#define VR_PCI_NEXTPTR          0xDD /* 8 bits */
#define VR_PCI_PWRMGMTCAP       0xDE /* 16 bits */
#define VR_PCI_PWRMGMTCTRL      0xE0 /* 16 bits */

#define VR_PSTATE_MASK          0x0003
#define VR_PSTATE_D0            0x0000
#define VR_PSTATE_D1            0x0002
#define VR_PSTATE_D2            0x0002
#define VR_PSTATE_D3            0x0003
#define VR_PME_EN               0x0010
#define VR_PME_STATUS           0x8000