| Current Path : /sys/dev/sis/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/dev/sis/if_sisreg.h |
/*-
* Copyright (c) 1997, 1998, 1999
* Bill Paul <wpaul@ee.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: release/9.1.0/sys/dev/sis/if_sisreg.h 227277 2011-11-06 21:09:10Z marius $
*/
/*
* Register definitions for the SiS 900 and SiS 7016 chipsets. The
* 7016 is actually an older chip and some of its registers differ
* from the 900, however the core operational registers are the same:
* the differences lie in the OnNow/Wake on LAN stuff which we don't
* use anyway. The 7016 needs an external MII compliant PHY while the
* SiS 900 has one built in. All registers are 32-bits wide.
*/
/* Registers common to SiS 900 and SiS 7016 */
#define SIS_CSR 0x00
#define SIS_CFG 0x04
#define SIS_EECTL 0x08
#define SIS_PCICTL 0x0C
#define SIS_ISR 0x10
#define SIS_IMR 0x14
#define SIS_IER 0x18
#define SIS_PHYCTL 0x1C
#define SIS_TX_LISTPTR 0x20
#define SIS_TX_CFG 0x24
#define SIS_RX_LISTPTR 0x30
#define SIS_RX_CFG 0x34
#define SIS_FLOWCTL 0x38
#define SIS_RXFILT_CTL 0x48
#define SIS_RXFILT_DATA 0x4C
#define SIS_PWRMAN_CTL 0xB0
#define SIS_PWERMAN_WKUP_EVENT 0xB4
#define SIS_WKUP_FRAME_CRC 0xBC
#define SIS_WKUP_FRAME_MASK0 0xC0
#define SIS_WKUP_FRAME_MASKXX 0xEC
/* SiS 7016 specific registers */
#define SIS_SILICON_REV 0x5C
#define SIS_MIB_CTL0 0x60
#define SIS_MIB_CTL1 0x64
#define SIS_MIB_CTL2 0x68
#define SIS_MIB_CTL3 0x6C
#define SIS_MIB 0x80
#define SIS_LINKSTS 0xA0
#define SIS_TIMEUNIT 0xA4
#define SIS_GPIO 0xB8
/* NS DP83815/6 registers */
#define NS_IHR 0x1C
#define NS_CLKRUN 0x3C
#define NS_WCSR 0x40
#define NS_SRR 0x58
#define NS_BMCR 0x80
#define NS_BMSR 0x84
#define NS_PHYIDR1 0x88
#define NS_PHYIDR2 0x8C
#define NS_ANAR 0x90
#define NS_ANLPAR 0x94
#define NS_ANER 0x98
#define NS_ANNPTR 0x9C
#define NS_PHY_CR 0xE4
#define NS_PHY_10BTSCR 0xE8
#define NS_PHY_PAGE 0xCC
#define NS_PHY_EXTCFG 0xF0
#define NS_PHY_DSPCFG 0xF4
#define NS_PHY_SDCFG 0xF8
#define NS_PHY_TDATA 0xFC
#define NS_CLKRUN_PMESTS 0x00008000
#define NS_CLKRUN_PMEENB 0x00000100
#define NS_CLNRUN_CLKRUN_ENB 0x00000001
#define NS_WCSR_WAKE_PHYINTR 0x00000001
#define NS_WCSR_WAKE_UCAST 0x00000002
#define NS_WCSR_WAKE_MCAST 0x00000004
#define NS_WCSR_WAKE_BCAST 0x00000008
#define NS_WCSR_WAKE_ARP 0x00000010
#define NS_WCSR_WAKE_PATTERN0 0x00000020
#define NS_WCSR_WAKE_PATTERN1 0x00000040
#define NS_WCSR_WAKE_PATTERN2 0x00000080
#define NS_WCSR_WAKE_PATTERN3 0x00000100
#define NS_WCSR_WAKE_MAGIC 0x00000200
#define NS_WCSR_WAKE_MAGIC_SEC 0x00000400
#define NS_WCSR_DET_MAGIC_SECH 0x00100000
#define NS_WCSR_DET_PHYINTR 0x00400000
#define NS_WCSR_DET_UCAST 0x00800000
#define NS_WCSR_DET_MCAST 0x01000000
#define NS_WCSR_DET_BCAST 0x02000000
#define NS_WCSR_DET_ARP 0x04000000
#define NS_WCSR_DET_PATTERN0 0x08000000
#define NS_WCSR_DET_PATTERN1 0x10000000
#define NS_WCSR_DET_PATTERN2 0x20000000
#define NS_WCSR_DET_PATTERN3 0x40000000
#define NS_WCSR_DET_MAGIC 0x80000000
/* NS silicon revisions */
#define NS_SRR_15C 0x302
#define NS_SRR_15D 0x403
#define NS_SRR_16A 0x505
#define SIS_CSR_TX_ENABLE 0x00000001
#define SIS_CSR_TX_DISABLE 0x00000002
#define SIS_CSR_RX_ENABLE 0x00000004
#define SIS_CSR_RX_DISABLE 0x00000008
#define SIS_CSR_TX_RESET 0x00000010
#define SIS_CSR_RX_RESET 0x00000020
#define SIS_CSR_SOFTINTR 0x00000080
#define SIS_CSR_RESET 0x00000100
#define SIS_CSR_ACCESS_MODE 0x00000200
#define SIS_CSR_RELOAD 0x00000400
#define SIS_CFG_BIGENDIAN 0x00000001
#define SIS_CFG_PERR_DETECT 0x00000008
#define SIS_CFG_DEFER_DISABLE 0x00000010
#define SIS_CFG_OUTOFWIN_TIMER 0x00000020
#define SIS_CFG_SINGLE_BACKOFF 0x00000040
#define SIS_CFG_PCIREQ_ALG 0x00000080
#define SIS_CFG_FAIR_BACKOFF 0x00000200 /* 635 & 900B Specific */
#define SIS_CFG_RND_CNT 0x00000400 /* 635 & 900B Specific */
#define SIS_CFG_EDB_MASTER_EN 0x00002000
#define SIS_EECTL_DIN 0x00000001
#define SIS_EECTL_DOUT 0x00000002
#define SIS_EECTL_CLK 0x00000004
#define SIS_EECTL_CSEL 0x00000008
#define SIS_MII_CLK 0x00000040
#define SIS_MII_DIR 0x00000020
#define SIS_MII_DATA 0x00000010
#define SIS_EECMD_WRITE 0x140
#define SIS_EECMD_READ 0x180
#define SIS_EECMD_ERASE 0x1c0
/*
* EEPROM Commands for SiS96x
* chipsets.
*/
#define SIS_EECMD_REQ 0x00000400
#define SIS_EECMD_DONE 0x00000200
#define SIS_EECMD_GNT 0x00000100
#define SIS_EE_NODEADDR 0x8
#define NS_EE_NODEADDR 0x6
#define SIS_PCICTL_SRAMADDR 0x0000001F
#define SIS_PCICTL_RAMTSTENB 0x00000020
#define SIS_PCICTL_TXTSTENB 0x00000040
#define SIS_PCICTL_RXTSTENB 0x00000080
#define SIS_PCICTL_BMTSTENB 0x00000200
#define SIS_PCICTL_RAMADDR 0x001F0000
#define SIS_PCICTL_ROMTIME 0x0F000000
#define SIS_PCICTL_DISCTEST 0x40000000
#define SIS_ISR_RX_OK 0x00000001
#define SIS_ISR_RX_DESC_OK 0x00000002
#define SIS_ISR_RX_ERR 0x00000004
#define SIS_ISR_RX_EARLY 0x00000008
#define SIS_ISR_RX_IDLE 0x00000010
#define SIS_ISR_RX_OFLOW 0x00000020
#define SIS_ISR_TX_OK 0x00000040
#define SIS_ISR_TX_DESC_OK 0x00000080
#define SIS_ISR_TX_ERR 0x00000100
#define SIS_ISR_TX_IDLE 0x00000200
#define SIS_ISR_TX_UFLOW 0x00000400
#define SIS_ISR_SOFTINTR 0x00000800
#define SIS_ISR_HIBITS 0x00008000
#define SIS_ISR_RX_FIFO_OFLOW 0x00010000
#define SIS_ISR_TGT_ABRT 0x00100000
#define SIS_ISR_BM_ABRT 0x00200000
#define SIS_ISR_SYSERR 0x00400000
#define SIS_ISR_PARITY_ERR 0x00800000
#define SIS_ISR_RX_RESET_DONE 0x01000000
#define SIS_ISR_TX_RESET_DONE 0x02000000
#define SIS_ISR_TX_PAUSE_START 0x04000000
#define SIS_ISR_TX_PAUSE_DONE 0x08000000
#define SIS_ISR_WAKE_EVENT 0x10000000
#define SIS_IMR_RX_OK 0x00000001
#define SIS_IMR_RX_DESC_OK 0x00000002
#define SIS_IMR_RX_ERR 0x00000004
#define SIS_IMR_RX_EARLY 0x00000008
#define SIS_IMR_RX_IDLE 0x00000010
#define SIS_IMR_RX_OFLOW 0x00000020
#define SIS_IMR_TX_OK 0x00000040
#define SIS_IMR_TX_DESC_OK 0x00000080
#define SIS_IMR_TX_ERR 0x00000100
#define SIS_IMR_TX_IDLE 0x00000200
#define SIS_IMR_TX_UFLOW 0x00000400
#define SIS_IMR_SOFTINTR 0x00000800
#define SIS_IMR_HIBITS 0x00008000
#define SIS_IMR_RX_FIFO_OFLOW 0x00010000
#define SIS_IMR_TGT_ABRT 0x00100000
#define SIS_IMR_BM_ABRT 0x00200000
#define SIS_IMR_SYSERR 0x00400000
#define SIS_IMR_PARITY_ERR 0x00800000
#define SIS_IMR_RX_RESET_DONE 0x01000000
#define SIS_IMR_TX_RESET_DONE 0x02000000
#define SIS_IMR_TX_PAUSE_START 0x04000000
#define SIS_IMR_TX_PAUSE_DONE 0x08000000
#define SIS_IMR_WAKE_EVENT 0x10000000
#define SIS_INTRS \
(SIS_IMR_RX_OFLOW|SIS_IMR_TX_UFLOW|SIS_IMR_TX_OK|\
SIS_IMR_TX_IDLE|SIS_IMR_RX_OK|SIS_IMR_RX_ERR|\
SIS_IMR_RX_IDLE|\
SIS_IMR_SYSERR)
#define SIS_IER_INTRENB 0x00000001
#define SIS_PHYCTL_ACCESS 0x00000010
#define SIS_PHYCTL_OP 0x00000020
#define SIS_PHYCTL_REGADDR 0x000007C0
#define SIS_PHYCTL_PHYADDR 0x0000F800
#define SIS_PHYCTL_PHYDATA 0xFFFF0000
#define SIS_PHYOP_READ 0x00000020
#define SIS_PHYOP_WRITE 0x00000000
#define SIS_TXCFG_DRAIN_THRESH 0x0000003F /* 32-byte units */
#define SIS_TXCFG_FILL_THRESH 0x00003F00 /* 32-byte units */
#define SIS_TXCFG_DMABURST 0x00700000
#define SIS_TXCFG_AUTOPAD 0x10000000
#define SIS_TXCFG_LOOPBK 0x20000000
#define SIS_TXCFG_IGN_HBEAT 0x40000000
#define SIS_TXCFG_IGN_CARR 0x80000000
#define SIS_TXCFG_DRAIN(x) (((x) >> 5) & SIS_TXCFG_DRAIN_THRESH)
#define SIS_TXCFG_FILL(x) ((((x) >> 5) << 8) & SIS_TXCFG_FILL_THRESH)
#define SIS_TXDMA_512BYTES 0x00000000
#define SIS_TXDMA_4BYTES 0x00100000
#define SIS_TXDMA_8BYTES 0x00200000
#define SIS_TXDMA_16BYTES 0x00300000
#define SIS_TXDMA_32BYTES 0x00400000
#define SIS_TXDMA_64BYTES 0x00500000
#define SIS_TXDMA_128BYTES 0x00600000
#define SIS_TXDMA_256BYTES 0x00700000
#define SIS_TXCFG_100 \
(SIS_TXDMA_64BYTES|SIS_TXCFG_AUTOPAD|\
SIS_TXCFG_FILL(64)|SIS_TXCFG_DRAIN(1536))
#define SIS_TXCFG_10 \
(SIS_TXDMA_32BYTES|SIS_TXCFG_AUTOPAD|\
SIS_TXCFG_FILL(64)|SIS_TXCFG_DRAIN(1536))
#define SIS_RXCFG_DRAIN_THRESH 0x0000003E /* 8-byte units */
#define SIS_TXCFG_MPII03D 0x00040000 /* "Must be 1" */
#define SIS_RXCFG_DMABURST 0x00700000
#define SIS_RXCFG_RX_JABBER 0x08000000
#define SIS_RXCFG_RX_TXPKTS 0x10000000
#define SIS_RXCFG_RX_RUNTS 0x40000000
#define SIS_RXCFG_RX_GIANTS 0x80000000
#define SIS_RXCFG_DRAIN(x) ((((x) >> 3) << 1) & SIS_RXCFG_DRAIN_THRESH)
#define SIS_RXDMA_512BYTES 0x00000000
#define SIS_RXDMA_4BYTES 0x00100000
#define SIS_RXDMA_8BYTES 0x00200000
#define SIS_RXDMA_16BYTES 0x00300000
#define SIS_RXDMA_32BYTES 0x00400000
#define SIS_RXDMA_64BYTES 0x00500000
#define SIS_RXDMA_128BYTES 0x00600000
#define SIS_RXDMA_256BYTES 0x00700000
#define SIS_RXCFG256 \
(SIS_RXCFG_DRAIN(64)|SIS_RXDMA_256BYTES)
#define SIS_RXCFG64 \
(SIS_RXCFG_DRAIN(64)|SIS_RXDMA_64BYTES)
#define SIS_RXFILTCTL_ADDR 0x000F0000
#define NS_RXFILTCTL_MCHASH 0x00200000
#define NS_RXFILTCTL_ARP 0x00400000
#define NS_RXFILTCTL_PERFECT 0x08000000
#define SIS_RXFILTCTL_ALLPHYS 0x10000000
#define SIS_RXFILTCTL_ALLMULTI 0x20000000
#define SIS_RXFILTCTL_BROAD 0x40000000
#define SIS_RXFILTCTL_ENABLE 0x80000000
#define SIS_FILTADDR_PAR0 0x00000000
#define SIS_FILTADDR_PAR1 0x00010000
#define SIS_FILTADDR_PAR2 0x00020000
#define SIS_FILTADDR_MAR0 0x00040000
#define SIS_FILTADDR_MAR1 0x00050000
#define SIS_FILTADDR_MAR2 0x00060000
#define SIS_FILTADDR_MAR3 0x00070000
#define SIS_FILTADDR_MAR4 0x00080000
#define SIS_FILTADDR_MAR5 0x00090000
#define SIS_FILTADDR_MAR6 0x000A0000
#define SIS_FILTADDR_MAR7 0x000B0000
#define NS_FILTADDR_PAR0 0x00000000
#define NS_FILTADDR_PAR1 0x00000002
#define NS_FILTADDR_PAR2 0x00000004
#define NS_FILTADDR_FMEM_LO 0x00000200
#define NS_FILTADDR_FMEM_HI 0x000003FE
#define SIS_PWRMAN_WOL_LINK_OFF 0x00000001
#define SIS_PWRMAN_WOL_LINK_ON 0x00000002
#define SIS_PWRMAN_WOL_MAGIC 0x00000400
/*
* TX/RX DMA descriptor structures.
*/
struct sis_desc {
/* SiS hardware descriptor section */
uint32_t sis_next;
volatile uint32_t sis_cmdsts;
volatile uint32_t sis_ptr;
};
#define SIS_CMDSTS_BUFLEN 0x00000FFF
#define SIS_CMDSTS_PKT_OK 0x08000000
#define SIS_CMDSTS_CRC 0x10000000
#define SIS_CMDSTS_INTR 0x20000000
#define SIS_CMDSTS_MORE 0x40000000
#define SIS_CMDSTS_OWN 0x80000000
#define SIS_RXSTAT_COLL 0x00010000
#define SIS_RXSTAT_LOOPBK 0x00020000
#define SIS_RXSTAT_ALIGNERR 0x00040000
#define SIS_RXSTAT_CRCERR 0x00080000
#define SIS_RXSTAT_SYMBOLERR 0x00100000
#define SIS_RXSTAT_RUNT 0x00200000
#define SIS_RXSTAT_GIANT 0x00400000
#define SIS_RXSTAT_DSTCLASS 0x01800000
#define SIS_RXSTAT_OVERRUN 0x02000000
#define SIS_RXSTAT_RX_ABORT 0x04000000
#define SIS_RXSTAT_ERROR(x) \
((x) & (SIS_RXSTAT_RX_ABORT | SIS_RXSTAT_OVERRUN | \
SIS_RXSTAT_GIANT | SIS_RXSTAT_SYMBOLERR | SIS_RXSTAT_RUNT | \
SIS_RXSTAT_CRCERR | SIS_RXSTAT_ALIGNERR))
#define SIS_DSTCLASS_REJECT 0x00000000
#define SIS_DSTCLASS_UNICAST 0x00800000
#define SIS_DSTCLASS_MULTICAST 0x01000000
#define SIS_DSTCLASS_BROADCAST 0x02000000
#define SIS_TXSTAT_COLLCNT 0x000F0000
#define SIS_TXSTAT_EXCESSCOLLS 0x00100000
#define SIS_TXSTAT_OUTOFWINCOLL 0x00200000
#define SIS_TXSTAT_EXCESS_DEFER 0x00400000
#define SIS_TXSTAT_DEFERED 0x00800000
#define SIS_TXSTAT_CARR_LOST 0x01000000
#define SIS_TXSTAT_UNDERRUN 0x02000000
#define SIS_TXSTAT_TX_ABORT 0x04000000
#define SIS_DESC_ALIGN 16
#define SIS_RX_BUF_ALIGN 4
#define SIS_MAXTXSEGS 16
#define SIS_RX_LIST_CNT 64
#define SIS_TX_LIST_CNT 128
#define SIS_RX_LIST_SZ SIS_RX_LIST_CNT * sizeof(struct sis_desc)
#define SIS_TX_LIST_SZ SIS_TX_LIST_CNT * sizeof(struct sis_desc)
#define SIS_ADDR_LO(x) ((uint64_t) (x) & 0xffffffff)
#define SIS_ADDR_HI(x) ((uint64_t) (x) >> 32)
#define SIS_RX_RING_ADDR(sc, i) \
((sc)->sis_rx_paddr + sizeof(struct sis_desc) * (i))
#define SIS_TX_RING_ADDR(sc, i) \
((sc)->sis_tx_paddr + sizeof(struct sis_desc) * (i))
#define SIS_INC(x, y) (x) = (x + 1) % (y)
/*
* SiS PCI vendor ID.
*/
#define SIS_VENDORID 0x1039
/*
* SiS PCI device IDs
*/
#define SIS_DEVICEID_900 0x0900
#define SIS_DEVICEID_7016 0x7016
/*
* SiS 900 PCI revision codes.
*/
#define SIS_REV_900B 0x0003
#define SIS_REV_630A 0x0080
#define SIS_REV_630E 0x0081
#define SIS_REV_630S 0x0082
#define SIS_REV_630EA1 0x0083
#define SIS_REV_630ET 0x0084
#define SIS_REV_635 0x0090
#define SIS_REV_96x 0x0091
/*
* NatSemi vendor ID
*/
#define NS_VENDORID 0x100B
/*
* DP83815 device ID
*/
#define NS_DEVICEID_DP83815 0x0020
struct sis_type {
uint16_t sis_vid;
uint16_t sis_did;
const char *sis_name;
};
#define SIS_TYPE_900 1
#define SIS_TYPE_7016 2
#define SIS_TYPE_83815 3
#define SIS_TYPE_83816 4
struct sis_txdesc {
struct mbuf *tx_m;
bus_dmamap_t tx_dmamap;
};
struct sis_rxdesc {
struct mbuf *rx_m;
bus_dmamap_t rx_dmamap;
struct sis_desc *rx_desc;
};
struct sis_softc {
struct ifnet *sis_ifp; /* interface info */
struct resource *sis_res[2];
void *sis_intrhand;
device_t sis_dev;
device_t sis_miibus;
uint8_t sis_type;
uint8_t sis_rev;
uint32_t sis_flags;
#define SIS_FLAG_MANUAL_PAD 0x0800
#define SIS_FLAG_LINK 0x8000
int sis_manual_pad;
uint32_t sis_srr;
struct sis_desc *sis_rx_list;
struct sis_desc *sis_tx_list;
bus_dma_tag_t sis_rx_list_tag;
bus_dmamap_t sis_rx_list_map;
bus_dma_tag_t sis_tx_list_tag;
bus_dmamap_t sis_tx_list_map;
bus_dma_tag_t sis_parent_tag;
bus_dma_tag_t sis_rx_tag;
bus_dmamap_t sis_rx_sparemap;
bus_dma_tag_t sis_tx_tag;
struct sis_rxdesc sis_rxdesc[SIS_RX_LIST_CNT];
struct sis_txdesc sis_txdesc[SIS_TX_LIST_CNT];
int sis_tx_prod;
int sis_tx_cons;
int sis_tx_cnt;
int sis_rx_cons;
bus_addr_t sis_rx_paddr;
bus_addr_t sis_tx_paddr;
struct callout sis_stat_ch;
int sis_watchdog_timer;
int sis_if_flags;
#ifdef DEVICE_POLLING
int rxcycles;
#endif
struct mtx sis_mtx;
};
#define SIS_TIMEOUT 1000
#define ETHER_ALIGN 2
#define SIS_RXLEN 1536
#define SIS_MIN_FRAMELEN 60
/*
* PCI low memory base and low I/O base register, and
* other PCI registers.
*/
#define SIS_PCI_VENDOR_ID 0x00
#define SIS_PCI_DEVICE_ID 0x02
#define SIS_PCI_COMMAND 0x04
#define SIS_PCI_STATUS 0x06
#define SIS_PCI_REVID 0x08
#define SIS_PCI_CLASSCODE 0x09
#define SIS_PCI_CACHELEN 0x0C
#define SIS_PCI_LATENCY_TIMER 0x0D
#define SIS_PCI_HEADER_TYPE 0x0E
#define SIS_PCI_LOIO 0x10
#define SIS_PCI_LOMEM 0x14
#define SIS_PCI_BIOSROM 0x30
#define SIS_PCI_INTLINE 0x3C
#define SIS_PCI_INTPIN 0x3D
#define SIS_PCI_MINGNT 0x3E
#define SIS_PCI_MINLAT 0x0F
#define SIS_PCI_RESETOPT 0x48
#define SIS_PCI_EEPROM_DATA 0x4C
/* power management registers */
#define SIS_PCI_CAPID 0x50 /* 8 bits */
#define SIS_PCI_NEXTPTR 0x51 /* 8 bits */
#define SIS_PCI_PWRMGMTCAP 0x52 /* 16 bits */
#define SIS_PCI_PWRMGMTCTRL 0x54 /* 16 bits */
#define SIS_PSTATE_MASK 0x0003
#define SIS_PSTATE_D0 0x0000
#define SIS_PSTATE_D1 0x0001
#define SIS_PSTATE_D2 0x0002
#define SIS_PSTATE_D3 0x0003
#define SIS_PME_EN 0x0010
#define SIS_PME_STATUS 0x8000