diff options
Diffstat (limited to 'drivers/net/pi2.h')
| -rw-r--r-- | drivers/net/pi2.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/drivers/net/pi2.h b/drivers/net/pi2.h new file mode 100644 index 000000000..8f45ea420 --- /dev/null +++ b/drivers/net/pi2.h @@ -0,0 +1,133 @@ + +#define DMA_BUFF_SIZE 2200 + +/* Network statistics, with the same names as 'struct enet_statistics'. */ +#define netstats enet_statistics + +#define ON 1 +#define OFF 0 + + +/* Register offset info, specific to the PI + * E.g., to read the data port on channel A, use + * inportb(pichan[dev].base + CHANA + DATA) + */ +#define CHANB 0 /* Base of channel B regs */ +#define CHANA 2 /* Base of channel A regs */ + +/* 8530 ports on each channel */ +#define CTL 0 +#define DATA 1 + +#define DMAEN 0x4 /* Offset off DMA Enable register */ + +/* Timer chip offsets */ +#define TMR0 0x8 /* Offset of timer 0 register */ +#define TMR1 0x9 /* Offset of timer 1 register */ +#define TMR2 0xA /* Offset of timer 2 register */ +#define TMRCMD 0xB /* Offset of timer command register */ + +/* Timer chip equates */ +#define SC0 0x00 /* Select counter 0 */ +#define SC1 0x40 /* Select counter 1 */ +#define SC2 0x80 /* Select counter 2 */ +#define CLATCH 0x00 /* Counter latching operation */ +#define MSB 0x20 /* Read/load MSB only */ +#define LSB 0x10 /* Read/load LSB only */ +#define LSB_MSB 0x30 /* Read/load LSB, then MSB */ +#define MODE0 0x00 /* Interrupt on terminal count */ +#define MODE1 0x02 /* Programmable one shot */ +#define MODE2 0x04 /* Rate generator */ +#define MODE3 0x06 /* Square wave rate generator */ +#define MODE4 0x08 /* Software triggered strobe */ +#define MODE5 0x0a /* Hardware triggered strobe */ +#define BCD 0x01 /* BCD counter */ + +/* DMA controller registers */ +#define DMA_STAT 8 /* DMA controller status register */ +#define DMA_CMD 8 /* DMA controller command register */ +#define DMA_MASK 10 /* DMA controller mask register */ +#define DMA_MODE 11 /* DMA controller mode register */ +#define DMA_RESETFF 12 /* DMA controller first/last flip flop */ +/* DMA data */ +#define DMA_DISABLE (0x04) /* Disable channel n */ +#define DMA_ENABLE (0x00) /* Enable channel n */ +/* Single transfers, incr. address, auto init, writes, ch. n */ +#define DMA_RX_MODE (0x54) +/* Single transfers, incr. address, no auto init, reads, ch. n */ +#define DMA_TX_MODE (0x48) + +#define SINGLE 3686400 +#define DOUBLE 7372800 + +#define SIOCGPIPARAM 0x5000 /* get PI parameters */ +#define SIOCSPIPARAM 0x5001 /* set */ +#define SIOCGPIBAUD 0x5002 /* get only baud rate */ +#define SIOCSPIBAUD 0x5003 +#define SIOCGPIDMA 0x5004 /* get only DMA */ +#define SIOCSPIDMA 0x5005 +#define SIOCGPIIRQ 0x5006 /* get only IRQ */ +#define SIOCSPIIRQ 0x5007 + +struct pi_req { + int cmd; + int speed; + int clockmode; + int txdelay; + unsigned char persist; + int slotime; + int squeldelay; + int dmachan; + int irq; +}; + +#ifdef __KERNEL__ + +/* Information that needs to be kept for each channel. */ +struct pi_local { + struct netstats stats; /* %%%dp*/ + long open_time; /* Useless example local info. */ + unsigned long xtal; + + struct mbuf *rcvbuf;/* Buffer for current rx packet */ + struct mbuf *rxdmabuf1; /* DMA rx buffer */ + struct mbuf *rxdmabuf2; /* DMA rx buffer */ + + int bufsiz; /* Size of rcvbuf */ + char *rcp; /* Pointer into rcvbuf */ + + struct sk_buff_head sndq; /* Packets awaiting transmission */ + int sndcnt; /* Number of packets on sndq */ + struct sk_buff *sndbuf; /* Current buffer being transmitted */ + char *txdmabuf; /* Transmit DMA buffer */ + char *txptr; /* Used by B port tx */ + int txcnt; + char tstate; /* Transmitter state */ +#define IDLE 0 /* Transmitter off, no data pending */ +#define ACTIVE 1 /* Transmitter on, sending data */ +#define UNDERRUN 2 /* Transmitter on, flushing CRC */ +#define FLAGOUT 3 /* CRC sent - attempt to start next frame */ +#define DEFER 4 /* Receive Active - DEFER Transmit */ +#define ST_TXDELAY 5 /* Sending leading flags */ +#define CRCOUT 6 + char rstate; /* Set when !DCD goes to 0 (TRUE) */ +/* Normal state is ACTIVE if Receive enabled */ +#define RXERROR 2 /* Error -- Aborting current Frame */ +#define RXABORT 3 /* ABORT sequence detected */ +#define TOOBIG 4 /* too large a frame to store */ + int dev; /* Device number */ + int base; /* Base of I/O registers */ + int cardbase; /* Base address of card */ + int stata; /* address of Channel A status regs */ + int statb; /* address of Channel B status regs */ + int speed; /* Line speed, bps */ + int clockmode; /* tapr 9600 modem clocking option */ + int txdelay; /* Transmit Delay 10 ms/cnt */ + unsigned char persist; /* Persistence (0-255) as a % */ + int slotime; /* Delay to wait on persistence hit */ + int squeldelay; /* Delay after XMTR OFF for squelch tail */ + struct iface *iface; /* Associated interface */ + int dmachan; /* DMA channel for this port */ +}; + +#endif |