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/* $Id: sunqe.h,v 1.13 2000/02/09 11:15:42 davem Exp $
* sunqe.h: Definitions for the Sun QuadEthernet driver.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
*/

#ifndef _SUNQE_H
#define _SUNQE_H

/* QEC global registers. */
#define GLOB_CTRL 0x00UL /* Control */
#define GLOB_STAT 0x04UL /* Status */
#define GLOB_PSIZE 0x08UL /* Packet Size */
#define GLOB_MSIZE 0x0cUL /* Local-memory Size */
#define GLOB_RSIZE 0x10UL /* Receive partition size */
#define GLOB_TSIZE 0x14UL /* Transmit partition size */
#define GLOB_REG_SIZE 0x18UL

#define GLOB_CTRL_MMODE 0x40000000 /* MACE qec mode */
#define GLOB_CTRL_BMODE 0x10000000 /* BigMAC qec mode */
#define GLOB_CTRL_EPAR 0x00000020 /* Enable parity */
#define GLOB_CTRL_ACNTRL 0x00000018 /* SBUS arbitration control */
#define GLOB_CTRL_B64 0x00000004 /* 64 byte dvma bursts */
#define GLOB_CTRL_B32 0x00000002 /* 32 byte dvma bursts */
#define GLOB_CTRL_B16 0x00000000 /* 16 byte dvma bursts */
#define GLOB_CTRL_RESET 0x00000001 /* Reset the QEC */

#define GLOB_STAT_TX 0x00000008 /* BigMAC Transmit IRQ */
#define GLOB_STAT_RX 0x00000004 /* BigMAC Receive IRQ */
#define GLOB_STAT_BM 0x00000002 /* BigMAC Global IRQ */
#define GLOB_STAT_ER 0x00000001 /* BigMAC Error IRQ */

#define GLOB_PSIZE_2048 0x00 /* 2k packet size */
#define GLOB_PSIZE_4096 0x01 /* 4k packet size */
#define GLOB_PSIZE_6144 0x10 /* 6k packet size */
#define GLOB_PSIZE_8192 0x11 /* 8k packet size */

/* In MACE mode, there are four qe channels. Each channel has it's own
* status bits in the QEC status register. This macro picks out the
* ones you want.
*/
#define GLOB_STAT_PER_QE(status, channel) (((status) >> ((channel) * 4)) & 0xf)

/* The following registers are for per-qe channel information/status. */
#define CREG_CTRL 0x00UL /* Control */
#define CREG_STAT 0x04UL /* Status */
#define CREG_RXDS 0x08UL /* RX descriptor ring ptr */
#define CREG_TXDS 0x0cUL /* TX descriptor ring ptr */
#define CREG_RIMASK 0x10UL /* RX Interrupt Mask */
#define CREG_TIMASK 0x14UL /* TX Interrupt Mask */
#define CREG_QMASK 0x18UL /* QEC Error Interrupt Mask */
#define CREG_MMASK 0x1cUL /* MACE Error Interrupt Mask */
#define CREG_RXWBUFPTR 0x20UL /* Local memory rx write ptr */
#define CREG_RXRBUFPTR 0x24UL /* Local memory rx read ptr */
#define CREG_TXWBUFPTR 0x28UL /* Local memory tx write ptr */
#define CREG_TXRBUFPTR 0x2cUL /* Local memory tx read ptr */
#define CREG_CCNT 0x30UL /* Collision Counter */
#define CREG_PIPG 0x34UL /* Inter-Frame Gap */
#define CREG_REG_SIZE 0x38UL

#define CREG_CTRL_RXOFF 0x00000004 /* Disable this qe's receiver*/
#define CREG_CTRL_RESET 0x00000002 /* Reset this qe channel */
#define CREG_CTRL_TWAKEUP 0x00000001 /* Transmitter Wakeup, 'go'. */

#define CREG_STAT_EDEFER 0x10000000 /* Excessive Defers */
#define CREG_STAT_CLOSS 0x08000000 /* Carrier Loss */
#define CREG_STAT_ERETRIES 0x04000000 /* More than 16 retries */
#define CREG_STAT_LCOLL 0x02000000 /* Late TX Collision */
#define CREG_STAT_FUFLOW 0x01000000 /* FIFO Underflow */
#define CREG_STAT_JERROR 0x00800000 /* Jabber Error */
#define CREG_STAT_BERROR 0x00400000 /* Babble Error */
#define CREG_STAT_TXIRQ 0x00200000 /* Transmit Interrupt */
#define CREG_STAT_CCOFLOW 0x00100000 /* TX Coll-counter Overflow */
#define CREG_STAT_TXDERROR 0x00080000 /* TX Descriptor is bogus */
#define CREG_STAT_TXLERR 0x00040000 /* Late Transmit Error */
#define CREG_STAT_TXPERR 0x00020000 /* Transmit Parity Error */
#define CREG_STAT_TXSERR 0x00010000 /* Transmit SBUS error ack */
#define CREG_STAT_RCCOFLOW 0x00001000 /* RX Coll-counter Overflow */
#define CREG_STAT_RUOFLOW 0x00000800 /* Runt Counter Overflow */
#define CREG_STAT_MCOFLOW 0x00000400 /* Missed Counter Overflow */
#define CREG_STAT_RXFOFLOW 0x00000200 /* RX FIFO Overflow */
#define CREG_STAT_RLCOLL 0x00000100 /* RX Late Collision */
#define CREG_STAT_FCOFLOW 0x00000080 /* Frame Counter Overflow */
#define CREG_STAT_CECOFLOW 0x00000040 /* CRC Error-counter Overflow*/
#define CREG_STAT_RXIRQ 0x00000020 /* Receive Interrupt */
#define CREG_STAT_RXDROP 0x00000010 /* Dropped a RX'd packet */
#define CREG_STAT_RXSMALL 0x00000008 /* Receive buffer too small */
#define CREG_STAT_RXLERR 0x00000004 /* Receive Late Error */
#define CREG_STAT_RXPERR 0x00000002 /* Receive Parity Error */
#define CREG_STAT_RXSERR 0x00000001 /* Receive SBUS Error ACK */

#define CREG_STAT_ERRORS (CREG_STAT_EDEFER|CREG_STAT_CLOSS|CREG_STAT_ERETRIES| \
CREG_STAT_LCOLL|CREG_STAT_FUFLOW|CREG_STAT_JERROR| \
CREG_STAT_BERROR|CREG_STAT_CCOFLOW|CREG_STAT_TXDERROR| \
CREG_STAT_TXLERR|CREG_STAT_TXPERR|CREG_STAT_TXSERR| \
CREG_STAT_RCCOFLOW|CREG_STAT_RUOFLOW|CREG_STAT_MCOFLOW| \
CREG_STAT_RXFOFLOW|CREG_STAT_RLCOLL|CREG_STAT_FCOFLOW| \
CREG_STAT_CECOFLOW|CREG_STAT_RXDROP|CREG_STAT_RXSMALL| \
CREG_STAT_RXLERR|CREG_STAT_RXPERR|CREG_STAT_RXSERR)

#define CREG_QMASK_COFLOW 0x00100000 /* CollCntr overflow */
#define CREG_QMASK_TXDERROR 0x00080000 /* TXD error */
#define CREG_QMASK_TXLERR 0x00040000 /* TX late error */
#define CREG_QMASK_TXPERR 0x00020000 /* TX parity error */
#define CREG_QMASK_TXSERR 0x00010000 /* TX sbus error ack */
#define CREG_QMASK_RXDROP 0x00000010 /* RX drop */
#define CREG_QMASK_RXBERROR 0x00000008 /* RX buffer error */
#define CREG_QMASK_RXLEERR 0x00000004 /* RX late error */
#define CREG_QMASK_RXPERR 0x00000002 /* RX parity error */
#define CREG_QMASK_RXSERR 0x00000001 /* RX sbus error ack */

#define CREG_MMASK_EDEFER 0x10000000 /* Excess defer */
#define CREG_MMASK_CLOSS 0x08000000 /* Carrier loss */
#define CREG_MMASK_ERETRY 0x04000000 /* Excess retry */
#define CREG_MMASK_LCOLL 0x02000000 /* Late collision error */
#define CREG_MMASK_UFLOW 0x01000000 /* Underflow */
#define CREG_MMASK_JABBER 0x00800000 /* Jabber error */
#define CREG_MMASK_BABBLE 0x00400000 /* Babble error */
#define CREG_MMASK_OFLOW 0x00000800 /* Overflow */
#define CREG_MMASK_RXCOLL 0x00000400 /* RX Coll-Cntr overflow */
#define CREG_MMASK_RPKT 0x00000200 /* Runt pkt overflow */
#define CREG_MMASK_MPKT 0x00000100 /* Missed pkt overflow */

#define CREG_PIPG_TENAB 0x00000020 /* Enable Throttle */
#define CREG_PIPG_MMODE 0x00000010 /* Manual Mode */
#define CREG_PIPG_WMASK 0x0000000f /* SBUS Wait Mask */

/* Per-channel AMD 79C940 MACE registers. */
#define MREGS_RXFIFO 0x00UL /* Receive FIFO */
#define MREGS_TXFIFO 0x01UL /* Transmit FIFO */
#define MREGS_TXFCNTL 0x02UL /* Transmit Frame Control */
#define MREGS_TXFSTAT 0x03UL /* Transmit Frame Status */
#define MREGS_TXRCNT 0x04UL /* Transmit Retry Count */
#define MREGS_RXFCNTL 0x05UL /* Receive Frame Control */
#define MREGS_RXFSTAT 0x06UL /* Receive Frame Status */
#define MREGS_FFCNT 0x07UL /* FIFO Frame Count */
#define MREGS_IREG 0x08UL /* Interrupt Register */
#define MREGS_IMASK 0x09UL /* Interrupt Mask */
#define MREGS_POLL 0x0aUL /* POLL Register */
#define MREGS_BCONFIG 0x0bUL /* BIU Config */
#define MREGS_FCONFIG 0x0cUL /* FIFO Config */
#define MREGS_MCONFIG 0x0dUL /* MAC Config */
#define MREGS_PLSCONFIG 0x0eUL /* PLS Config */
#define MREGS_PHYCONFIG 0x0fUL /* PHY Config */
#define MREGS_CHIPID1 0x10UL /* Chip-ID, low bits */
#define MREGS_CHIPID2 0x11UL /* Chip-ID, high bits */
#define MREGS_IACONFIG 0x12UL /* Internal Address Config */
/* 0x13UL, reserved */
#define MREGS_FILTER 0x14UL /* Logical Address Filter */
#define MREGS_ETHADDR 0x15UL /* Our Ethernet Address */
/* 0x16UL, reserved */
/* 0x17UL, reserved */
#define MREGS_MPCNT 0x18UL /* Missed Packet Count */
/* 0x19UL, reserved */
#define MREGS_RPCNT 0x1aUL /* Runt Packet Count */
#define MREGS_RCCNT 0x1bUL /* RX Collision Count */
/* 0x1cUL, reserved */
#define MREGS_UTEST 0x1dUL /* User Test */
#define MREGS_RTEST1 0x1eUL /* Reserved Test 1 */
#define MREGS_RTEST2 0x1fUL /* Reserved Test 2 */
#define MREGS_REG_SIZE 0x20UL

#define MREGS_TXFCNTL_DRETRY 0x80 /* Retry disable */
#define MREGS_TXFCNTL_DFCS 0x08 /* Disable TX FCS */
#define MREGS_TXFCNTL_AUTOPAD 0x01 /* TX auto pad */

#define MREGS_TXFSTAT_VALID 0x80 /* TX valid */
#define MREGS_TXFSTAT_UNDERFLOW 0x40 /* TX underflow */
#define MREGS_TXFSTAT_LCOLL 0x20 /* TX late collision */
#define MREGS_TXFSTAT_MRETRY 0x10 /* TX > 1 retries */
#define MREGS_TXFSTAT_ORETRY 0x08 /* TX 1 retry */
#define MREGS_TXFSTAT_PDEFER 0x04 /* TX pkt deferred */
#define MREGS_TXFSTAT_CLOSS 0x02 /* TX carrier lost */
#define MREGS_TXFSTAT_RERROR 0x01 /* TX retry error */

#define MREGS_TXRCNT_EDEFER 0x80 /* TX Excess defers */
#define MREGS_TXRCNT_CMASK 0x0f /* TX retry count */

#define MREGS_RXFCNTL_LOWLAT 0x08 /* RX low latency */
#define MREGS_RXFCNTL_AREJECT 0x04 /* RX addr match rej */
#define MREGS_RXFCNTL_AUTOSTRIP 0x01 /* RX auto strip */

#define MREGS_RXFSTAT_OVERFLOW 0x80 /* RX overflow */
#define MREGS_RXFSTAT_LCOLL 0x40 /* RX late collision */
#define MREGS_RXFSTAT_FERROR 0x20 /* RX framing error */
#define MREGS_RXFSTAT_FCSERROR 0x10 /* RX FCS error */
#define MREGS_RXFSTAT_RBCNT 0x0f /* RX msg byte count */

#define MREGS_FFCNT_RX 0xf0 /* RX FIFO frame cnt */
#define MREGS_FFCNT_TX 0x0f /* TX FIFO frame cnt */

#define MREGS_IREG_JABBER 0x80 /* IRQ Jabber error */
#define MREGS_IREG_BABBLE 0x40 /* IRQ Babble error */
#define MREGS_IREG_COLL 0x20 /* IRQ Collision error */
#define MREGS_IREG_RCCO 0x10 /* IRQ Collision cnt overflow */
#define MREGS_IREG_RPKTCO 0x08 /* IRQ Runt packet count overflow */
#define MREGS_IREG_MPKTCO 0x04 /* IRQ missed packet cnt overflow */
#define MREGS_IREG_RXIRQ 0x02 /* IRQ RX'd a packet */
#define MREGS_IREG_TXIRQ 0x01 /* IRQ TX'd a packet */

#define MREGS_IMASK_BABBLE 0x40 /* IMASK Babble errors */
#define MREGS_IMASK_COLL 0x20 /* IMASK Collision errors */
#define MREGS_IMASK_MPKTCO 0x04 /* IMASK Missed pkt cnt overflow */
#define MREGS_IMASK_RXIRQ 0x02 /* IMASK RX interrupts */
#define MREGS_IMASK_TXIRQ 0x01 /* IMASK TX interrupts */

#define MREGS_POLL_TXVALID 0x80 /* TX is valid */
#define MREGS_POLL_TDTR 0x40 /* TX data transfer request */
#define MREGS_POLL_RDTR 0x20 /* RX data transfer request */

#define MREGS_BCONFIG_BSWAP 0x40 /* Byte Swap */
#define MREGS_BCONFIG_4TS 0x00 /* 4byte transmit start point */
#define MREGS_BCONFIG_16TS 0x10 /* 16byte transmit start point */
#define MREGS_BCONFIG_64TS 0x20 /* 64byte transmit start point */
#define MREGS_BCONFIG_112TS 0x30 /* 112byte transmit start point */
#define MREGS_BCONFIG_RESET 0x01 /* SW-Reset the MACE */

#define MREGS_FCONFIG_TXF8 0x00 /* TX fifo 8 write cycles */
#define MREGS_FCONFIG_TXF32 0x80 /* TX fifo 32 write cycles */
#define MREGS_FCONFIG_TXF16 0x40 /* TX fifo 16 write cycles */
#define MREGS_FCONFIG_RXF64 0x20 /* RX fifo 64 write cycles */
#define MREGS_FCONFIG_RXF32 0x10 /* RX fifo 32 write cycles */
#define MREGS_FCONFIG_RXF16 0x00 /* RX fifo 16 write cycles */
#define MREGS_FCONFIG_TFWU 0x08 /* TX fifo watermark update */
#define MREGS_FCONFIG_RFWU 0x04 /* RX fifo watermark update */
#define MREGS_FCONFIG_TBENAB 0x02 /* TX burst enable */
#define MREGS_FCONFIG_RBENAB 0x01 /* RX burst enable */

#define MREGS_MCONFIG_PROMISC 0x80 /* Promiscuous mode enable */
#define MREGS_MCONFIG_TPDDISAB 0x40 /* TX 2part deferral enable */
#define MREGS_MCONFIG_MBAENAB 0x20 /* Modified backoff enable */
#define MREGS_MCONFIG_RPADISAB 0x08 /* RX physical addr disable */
#define MREGS_MCONFIG_RBDISAB 0x04 /* RX broadcast disable */
#define MREGS_MCONFIG_TXENAB 0x02 /* Enable transmitter */
#define MREGS_MCONFIG_RXENAB 0x01 /* Enable receiver */

#define MREGS_PLSCONFIG_TXMS 0x08 /* TX mode select */
#define MREGS_PLSCONFIG_GPSI 0x06 /* Use GPSI connector */
#define MREGS_PLSCONFIG_DAI 0x04 /* Use DAI connector */
#define MREGS_PLSCONFIG_TP 0x02 /* Use TwistedPair connector */
#define MREGS_PLSCONFIG_AUI 0x00 /* Use AUI connector */
#define MREGS_PLSCONFIG_IOENAB 0x01 /* PLS I/O enable */

#define MREGS_PHYCONFIG_LSTAT 0x80 /* Link status */
#define MREGS_PHYCONFIG_LTESTDIS 0x40 /* Disable link test logic */
#define MREGS_PHYCONFIG_RXPOLARITY 0x20 /* RX polarity */
#define MREGS_PHYCONFIG_APCDISAB 0x10 /* AutoPolarityCorrect disab */
#define MREGS_PHYCONFIG_LTENAB 0x08 /* Select low threshold */
#define MREGS_PHYCONFIG_AUTO 0x04 /* Connector port auto-sel */
#define MREGS_PHYCONFIG_RWU 0x02 /* Remote WakeUp */
#define MREGS_PHYCONFIG_AW 0x01 /* Auto Wakeup */

#define MREGS_IACONFIG_ACHNGE 0x80 /* Do address change */
#define MREGS_IACONFIG_PARESET 0x04 /* Physical address reset */
#define MREGS_IACONFIG_LARESET 0x02 /* Logical address reset */

#define MREGS_UTEST_RTRENAB 0x80 /* Enable resv test register */
#define MREGS_UTEST_RTRDISAB 0x40 /* Disab resv test register */
#define MREGS_UTEST_RPACCEPT 0x20 /* Accept runt packets */
#define MREGS_UTEST_FCOLL 0x10 /* Force collision status */
#define MREGS_UTEST_FCSENAB 0x08 /* Enable FCS on RX */
#define MREGS_UTEST_INTLOOPM 0x06 /* Intern lpback w/MENDEC */
#define MREGS_UTEST_INTLOOP 0x04 /* Intern lpback */
#define MREGS_UTEST_EXTLOOP 0x02 /* Extern lpback */
#define MREGS_UTEST_NOLOOP 0x00 /* No loopback */

struct qe_rxd {
u32 rx_flags;
u32 rx_addr;
};

#define RXD_OWN 0x80000000 /* Ownership. */
#define RXD_UPDATE 0x10000000 /* Being Updated? */
#define RXD_LENGTH 0x000007ff /* Packet Length. */

struct qe_txd {
u32 tx_flags;
u32 tx_addr;
};

#define TXD_OWN 0x80000000 /* Ownership. */
#define TXD_SOP 0x40000000 /* Start Of Packet */
#define TXD_EOP 0x20000000 /* End Of Packet */
#define TXD_UPDATE 0x10000000 /* Being Updated? */
#define TXD_LENGTH 0x000007ff /* Packet Length. */

#define TX_RING_MAXSIZE 256
#define RX_RING_MAXSIZE 256

#define TX_RING_SIZE 16
#define RX_RING_SIZE 16

#define NEXT_RX(num) (((num) + 1) & (RX_RING_MAXSIZE - 1))
#define NEXT_TX(num) (((num) + 1) & (TX_RING_MAXSIZE - 1))
#define PREV_RX(num) (((num) - 1) & (RX_RING_MAXSIZE - 1))
#define PREV_TX(num) (((num) - 1) & (TX_RING_MAXSIZE - 1))

#define TX_BUFFS_AVAIL(qp) \
(((qp)->tx_old <= (qp)->tx_new) ? \
(qp)->tx_old + (TX_RING_SIZE - 1) - (qp)->tx_new : \
(qp)->tx_old - (qp)->tx_new - 1)

struct qe_init_block {
struct qe_rxd qe_rxd[RX_RING_MAXSIZE];
struct qe_txd qe_txd[TX_RING_MAXSIZE];
};

#define qib_offset(mem, elem) \
((__u32)((unsigned long)(&(((struct qe_init_block *)0)->mem[elem]))))

struct sunqe;

struct sunqec {
void __iomem *gregs; /* QEC Global Registers */
struct sunqe *qes[4]; /* Each child MACE */
unsigned int qec_bursts; /* Support burst sizes */
struct platform_device *op; /* QEC's OF device */
struct sunqec *next_module; /* List of all QECs in system */
};

#define PKT_BUF_SZ 1664
#define RXD_PKT_SZ 1664

struct sunqe_buffers {
u8 tx_buf[TX_RING_SIZE][PKT_BUF_SZ];
u8 __pad[2];
u8 rx_buf[RX_RING_SIZE][PKT_BUF_SZ];
};

#define qebuf_offset(mem, elem) \
((__u32)((unsigned long)(&(((struct sunqe_buffers *)0)->mem[elem][0]))))

struct sunqe {
void __iomem *qcregs; /* QEC per-channel Registers */
void __iomem *mregs; /* Per-channel MACE Registers */
struct qe_init_block *qe_block; /* RX and TX descriptors */
__u32 qblock_dvma; /* RX and TX descriptors */
spinlock_t lock; /* Protects txfull state */
int rx_new, rx_old; /* RX ring extents */
int tx_new, tx_old; /* TX ring extents */
struct sunqe_buffers *buffers; /* CPU visible address. */
__u32 buffers_dvma; /* DVMA visible address. */
struct sunqec *parent;
u8 mconfig; /* Base MACE mconfig value */
struct platform_device *op; /* QE's OF device struct */
struct net_device *dev; /* QE's netdevice struct */
int channel; /* Who am I? */
};

#endif /* !(_SUNQE_H) */
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