i386/linux/linux-0.99/drivers/net/atp.h

   1 #include <linux/if_ether.h>
   2 #include <linux/types.h>
   3 #include <asm/io.h>
   4
   5 struct net_local {
   6 #ifdef __KERNEL__
   7     struct enet_statistics stats;
   8 #endif
   9     ushort saved_tx_size;
  10     unsigned char
  11         re_tx,                  /* Number of packet retransmissions. */
  12         tx_unit_busy,
  13         addr_mode,              /* Current Rx filter e.g. promiscuous, etc. */
  14         pac_cnt_in_tx_buf;
  15 };
  16
  17 struct rx_header {
  18     ushort pad;                 /* The first read is always corrupted. */
  19     ushort rx_count;
  20     ushort rx_status;           /* Unknown bit assignments :-<.  */
  21     ushort cur_addr;            /* Apparently the current buffer address(?) */
  22 };
  23
  24 #define PAR_DATA        0
  25 #define PAR_STATUS      1
  26 #define PAR_CONTROL 2
  27
  28 #define Ctrl_LNibRead   0x08    /* LP_PSELECP */
  29 #define Ctrl_HNibRead   0
  30 #define Ctrl_LNibWrite  0x08    /* LP_PSELECP */
  31 #define Ctrl_HNibWrite  0
  32 #define Ctrl_SelData    0x04    /* LP_PINITP */
  33 #define Ctrl_IRQEN      0x10    /* LP_PINTEN */
  34
  35 #define EOW     0xE0
  36 #define EOC     0xE0
  37 #define WrAddr  0x40    /* Set address of EPLC read, write register. */
  38 #define RdAddr  0xC0
  39 #define HNib    0x10
  40
  41 enum page0_regs
  42 {
  43     /* The first six registers hold the ethernet physical station address. */
  44     PAR0 = 0, PAR1 = 1, PAR2 = 2, PAR3 = 3, PAR4 = 4, PAR5 = 5,
  45     TxCNT0 = 6, TxCNT1 = 7,             /* The transmit byte count. */
  46     TxSTAT = 8, RxSTAT = 9,             /* Tx and Rx status. */
  47     ISR = 10, IMR = 11,                 /* Interrupt status and mask. */
  48     CMR1 = 12,                          /* Command register 1. */
  49     CMR2 = 13,                          /* Command register 2. */
  50     MAR = 14,                           /* Memory address register. */
  51     CMR2_h = 0x1d, };
  52
  53 enum eepage_regs
  54 { PROM_CMD = 6, PROM_DATA = 7 };        /* Note that PROM_CMD is in the "high" bits. */
  55
  56
  57 #define ISR_TxOK        0x01
  58 #define ISR_RxOK        0x04
  59 #define ISR_TxErr       0x02
  60 #define ISRh_RxErr      0x11    /* ISR, high nibble */
  61
  62 #define CMR1h_RESET     0x04    /* Reset. */
  63 #define CMR1h_RxENABLE  0x02    /* Rx unit enable.  */
  64 #define CMR1h_TxENABLE  0x01    /* Tx unit enable.  */
  65 #define CMR1h_TxRxOFF   0x00
  66 #define CMR1_ReXmit     0x08    /* Trigger a retransmit. */
  67 #define CMR1_Xmit       0x04    /* Trigger a transmit. */
  68 #define CMR1_IRQ        0x02    /* Interrupt active. */
  69 #define CMR1_BufEnb     0x01    /* Enable the buffer(?). */
  70 #define CMR1_NextPkt    0x01    /* Enable the buffer(?). */
  71
  72 #define CMR2_NULL       8
  73 #define CMR2_IRQOUT     9
  74 #define CMR2_RAMTEST    10
  75 #define CMR2_EEPROM     12      /* Set to page 1, for reading the EEPROM. */
  76
  77 #define CMR2h_OFF       0       /* No accept mode. */
  78 #define CMR2h_Physical  1       /* Accept a physical address match only. */
  79 #define CMR2h_Normal    2       /* Accept physical and broadcast address. */
  80 #define CMR2h_PROMISC   3       /* Promiscuous mode. */
  81
  82 /* An inline function used below: it differs from inb() by explicitly return an unsigned
  83    char, saving a truncation. */
  84 extern inline unsigned char inbyte(unsigned short port)
  85 {
  86     unsigned char _v;
  87     __asm__ __volatile__ ("inb %w1,%b0" :"=a" (_v):"d" (port));
  88     return _v;
  89 }
  90
  91 /* Read register OFFSET.
  92    This command should aways be terminated with read_end(). */
  93 extern inline unsigned char read_nibble(short port, unsigned char offset)
  94 {
  95     unsigned char retval;
  96     outb(EOC+offset, port + PAR_DATA);
  97     outb(RdAddr+offset, port + PAR_DATA);
  98     inbyte(port + PAR_STATUS);          /* Settling time delay */
  99     retval = inbyte(port + PAR_STATUS);
 100     outb(EOC+offset, port + PAR_DATA);
 101
 102     return retval;
 103 }
 104
 105 /* Functions for bulk data read.  The interrupt line is always disabled. */
 106 /* Get a byte using read mode 0, reading data from the control lines. */
 107 extern inline unsigned char read_byte_mode0(short ioaddr)
 108 {
 109     unsigned char low_nib;
 110
 111     outb(Ctrl_LNibRead, ioaddr + PAR_CONTROL);
 112     inbyte(ioaddr + PAR_STATUS);
 113     low_nib = (inbyte(ioaddr + PAR_STATUS) >> 3) & 0x0f;
 114     outb(Ctrl_HNibRead, ioaddr + PAR_CONTROL);
 115     inbyte(ioaddr + PAR_STATUS);        /* Settling time delay -- needed!  */
 116     inbyte(ioaddr + PAR_STATUS);        /* Settling time delay -- needed!  */
 117     return low_nib | ((inbyte(ioaddr + PAR_STATUS) << 1) & 0xf0);
 118 }
 119
 120 /* The same as read_byte_mode0(), but does multiple inb()s for stability. */
 121 extern inline unsigned char read_byte_mode2(short ioaddr)
 122 {
 123     unsigned char low_nib;
 124
 125     outb(Ctrl_LNibRead, ioaddr + PAR_CONTROL);
 126     inbyte(ioaddr + PAR_STATUS);
 127     low_nib = (inbyte(ioaddr + PAR_STATUS) >> 3) & 0x0f;
 128     outb(Ctrl_HNibRead, ioaddr + PAR_CONTROL);
 129     inbyte(ioaddr + PAR_STATUS);        /* Settling time delay -- needed!  */
 130     return low_nib | ((inbyte(ioaddr + PAR_STATUS) << 1) & 0xf0);
 131 }
 132
 133 /* Read a byte through the data register. */
 134 extern inline unsigned char read_byte_mode4(short ioaddr)
 135 {
 136     unsigned char low_nib;
 137
 138     outb(RdAddr | MAR, ioaddr + PAR_DATA);
 139     low_nib = (inbyte(ioaddr + PAR_STATUS) >> 3) & 0x0f;
 140     outb(RdAddr | HNib | MAR, ioaddr + PAR_DATA);
 141     return low_nib | ((inbyte(ioaddr + PAR_STATUS) << 1) & 0xf0);
 142 }
 143
 144 /* Read a byte through the data register, double reading to allow settling. */
 145 extern inline unsigned char read_byte_mode6(short ioaddr)
 146 {
 147     unsigned char low_nib;
 148
 149     outb(RdAddr | MAR, ioaddr + PAR_DATA);
 150     inbyte(ioaddr + PAR_STATUS);
 151     low_nib = (inbyte(ioaddr + PAR_STATUS) >> 3) & 0x0f;
 152     outb(RdAddr | HNib | MAR, ioaddr + PAR_DATA);
 153     inbyte(ioaddr + PAR_STATUS);
 154     return low_nib | ((inbyte(ioaddr + PAR_STATUS) << 1) & 0xf0);
 155 }
 156
 157 extern inline void
 158 write_reg(short port, unsigned char reg, unsigned char value)
 159 {
 160     unsigned char outval;
 161     outb(EOC | reg, port + PAR_DATA);
 162     outval = WrAddr | reg;
 163     outb(outval, port + PAR_DATA);
 164     outb(outval, port + PAR_DATA);      /* Double write for PS/2. */
 165
 166     outval &= 0xf0;
 167     outval |= value;
 168     outb(outval, port + PAR_DATA);
 169     outval &= 0x1f;
 170     outb(outval, port + PAR_DATA);
 171     outb(outval, port + PAR_DATA);
 172
 173     outb(EOC | outval, port + PAR_DATA);
 174 }
 175
 176 extern inline void
 177 write_reg_high(short port, unsigned char reg, unsigned char value)
 178 {
 179     unsigned char outval = EOC | HNib | reg;
 180
 181     outb(outval, port + PAR_DATA);
 182     outval &= WrAddr | HNib | 0x0f;
 183     outb(outval, port + PAR_DATA);
 184     outb(outval, port + PAR_DATA);      /* Double write for PS/2. */
 185
 186     outval = WrAddr | HNib | value;
 187     outb(outval, port + PAR_DATA);
 188     outval &= HNib | 0x0f;              /* HNib | value */
 189     outb(outval, port + PAR_DATA);
 190     outb(outval, port + PAR_DATA);
 191
 192     outb(EOC | HNib | outval, port + PAR_DATA);
 193 }
 194
 195 /* Write a byte out using nibble mode.  The low nibble is written first. */
 196 extern inline void
 197 write_reg_byte(short port, unsigned char reg, unsigned char value)
 198 {
 199     unsigned char outval;
 200     outb(EOC | reg, port + PAR_DATA);   /* Reset the address register. */
 201     outval = WrAddr | reg;
 202     outb(outval, port + PAR_DATA);
 203     outb(outval, port + PAR_DATA);      /* Double write for PS/2. */
 204
 205     outb((outval & 0xf0) | (value & 0x0f), port + PAR_DATA);
 206     outb(value & 0x0f, port + PAR_DATA);
 207     value >>= 4;
 208     outb(value, port + PAR_DATA);
 209     outb(0x10 | value, port + PAR_DATA);
 210     outb(0x10 | value, port + PAR_DATA);
 211
 212     outb(EOC  | value, port + PAR_DATA);        /* Reset the address register. */
 213 }
 214
 215 /*
 216  * Bulk data writes to the packet buffer.  The interrupt line remains enabled.
 217  * The first, faster method uses only the dataport (data modes 0, 2 & 4).
 218  * The second (backup) method uses data and control regs (modes 1, 3 & 5).
 219  * It should only be needed when there is skew between the individual data
 220  * lines.
 221  */
 222 extern inline void write_byte_mode0(short ioaddr, unsigned char value)
 223 {
 224     outb(value & 0x0f, ioaddr + PAR_DATA);
 225     outb((value>>4) | 0x10, ioaddr + PAR_DATA);
 226 }
 227
 228 extern inline void write_byte_mode1(short ioaddr, unsigned char value)
 229 {
 230     outb(value & 0x0f, ioaddr + PAR_DATA);
 231     outb(Ctrl_IRQEN | Ctrl_LNibWrite, ioaddr + PAR_CONTROL);
 232     outb((value>>4) | 0x10, ioaddr + PAR_DATA);
 233     outb(Ctrl_IRQEN | Ctrl_HNibWrite, ioaddr + PAR_CONTROL);
 234 }
 235
 236 /* Write 16bit VALUE to the packet buffer: the same as above just doubled. */
 237 extern inline void write_word_mode0(short ioaddr, unsigned short value)
 238 {
 239     outb(value & 0x0f, ioaddr + PAR_DATA);
 240     value >>= 4;
 241     outb((value & 0x0f) | 0x10, ioaddr + PAR_DATA);
 242     value >>= 4;
 243     outb(value & 0x0f, ioaddr + PAR_DATA);
 244     value >>= 4;
 245     outb((value & 0x0f) | 0x10, ioaddr + PAR_DATA);
 246 }
 247
 248 /*  EEPROM_Ctrl bits. */
 249 #define EE_SHIFT_CLK    0x04    /* EEPROM shift clock. */
 250 #define EE_CS           0x02    /* EEPROM chip select. */
 251 #define EE_CLK_HIGH     0x12
 252 #define EE_CLK_LOW      0x16
 253 #define EE_DATA_WRITE   0x01    /* EEPROM chip data in. */
 254 #define EE_DATA_READ    0x08    /* EEPROM chip data out. */
 255
 256 /* Delay between EEPROM clock transitions. */
 257 #define eeprom_delay(ticks) \
 258 do { int _i = 40; while (--_i > 0) { __SLOW_DOWN_IO; }} while (0)
 259
 260 /* The EEPROM commands include the alway-set leading bit. */
 261 #define EE_WRITE_CMD(offset)    (((5 << 6) + (offset)) << 17)
 262 #define EE_READ(offset)         (((6 << 6) + (offset)) << 17)
 263 #define EE_ERASE(offset)        (((7 << 6) + (offset)) << 17)
 264 #define EE_CMD_SIZE     27      /* The command+address+data size. */