Annotation of qemu/roms/ipxe/src/drivers/net/davicom.c, revision 1.1.1.1

1.1       root        1: #ifdef ALLMULTI
                      2: #error multicast support is not yet implemented
                      3: #endif
                      4: /*  
                      5:     DAVICOM DM9009/DM9102/DM9102A Etherboot Driver     V1.00
                      6: 
                      7:     This driver was ported from Marty Connor's Tulip Etherboot driver. 
                      8:     Thanks Marty Connor ([email protected]) 
                      9: 
                     10:     This davicom etherboot driver supports DM9009/DM9102/DM9102A/
                     11:     DM9102A+DM9801/DM9102A+DM9802 NICs.
                     12: 
                     13:     This software may be used and distributed according to the terms
                     14:     of the GNU Public License, incorporated herein by reference.
                     15: 
                     16: */
                     17: 
                     18: FILE_LICENCE ( GPL_ANY );
                     19: 
                     20: /*********************************************************************/
                     21: /* Revision History                                                  */
                     22: /*********************************************************************/
                     23: 
                     24: /*
                     25:   19 OCT 2000  Sten     1.00
                     26:                        Different half and full duplex mode
                     27:                        Do the different programming for DM9801/DM9802
                     28: 
                     29:   12 OCT 2000  Sten     0.90
                     30:                        This driver was ported from tulip driver and it 
                     31:                        has the following difference.
                     32:                        Changed symbol tulip/TULIP to davicom/DAVICOM
                     33:                        Deleted some code that did not use in this driver.
                     34:                        Used chain-strcture to replace ring structure
                     35:                        for both TX/RX descriptor.
                     36:                        Allocated two tx descriptor.
                     37:                        According current media mode to set operating 
                     38:                        register(CR6)
                     39: */
                     40: 
                     41: 
                     42: /*********************************************************************/
                     43: /* Declarations                                                      */
                     44: /*********************************************************************/
                     45: 
                     46: #include "etherboot.h"
                     47: #include "nic.h"
                     48: #include <ipxe/pci.h>
                     49: #include <ipxe/ethernet.h>
                     50: 
                     51: #define TX_TIME_OUT       2*TICKS_PER_SEC
                     52: 
                     53: /* Register offsets for davicom device */
                     54: enum davicom_offsets {
                     55:    CSR0=0,     CSR1=0x08,  CSR2=0x10,  CSR3=0x18,  CSR4=0x20,  CSR5=0x28,
                     56:    CSR6=0x30,  CSR7=0x38,  CSR8=0x40,  CSR9=0x48, CSR10=0x50, CSR11=0x58,
                     57:   CSR12=0x60, CSR13=0x68, CSR14=0x70, CSR15=0x78, CSR16=0x80, CSR20=0xA0
                     58: };
                     59: 
                     60: /* EEPROM Address width definitions */
                     61: #define EEPROM_ADDRLEN 6
                     62: #define EEPROM_SIZE    32              /* 1 << EEPROM_ADDRLEN */
                     63: /* Used to be 128, but we only need to read enough to get the MAC
                     64:    address at bytes 20..25 */
                     65: 
                     66: /* Data Read from the EEPROM */
                     67: static unsigned char ee_data[EEPROM_SIZE];
                     68: 
                     69: /* The EEPROM commands include the alway-set leading bit. */
                     70: #define EE_WRITE_CMD    (5 << addr_len)
                     71: #define EE_READ_CMD     (6 << addr_len)
                     72: #define EE_ERASE_CMD    (7 << addr_len)
                     73: 
                     74: /* EEPROM_Ctrl bits. */
                     75: #define EE_SHIFT_CLK    0x02    /* EEPROM shift clock. */
                     76: #define EE_CS           0x01    /* EEPROM chip select. */
                     77: #define EE_DATA_WRITE   0x04    /* EEPROM chip data in. */
                     78: #define EE_WRITE_0      0x01
                     79: #define EE_WRITE_1      0x05
                     80: #define EE_DATA_READ    0x08    /* EEPROM chip data out. */
                     81: #define EE_ENB          (0x4800 | EE_CS)
                     82: 
                     83: /* Sten 10/11 for phyxcer */
                     84: #define PHY_DATA_0     0x0
                     85: #define PHY_DATA_1     0x20000
                     86: #define MDCLKH         0x10000
                     87: 
                     88: /* Delay between EEPROM clock transitions.  Even at 33Mhz current PCI
                     89:    implementations don't overrun the EEPROM clock.  We add a bus
                     90:    turn-around to insure that this remains true.  */
                     91: #define eeprom_delay()  inl(ee_addr)
                     92: 
                     93: /* helpful macro if on a big_endian machine for changing byte order.
                     94:    not strictly needed on Intel
                     95:    Already defined in Etherboot includes
                     96: #define le16_to_cpu(val) (val)
                     97: */
                     98: 
                     99: /* transmit and receive descriptor format */
                    100: struct txdesc {
                    101:   volatile unsigned long   status;         /* owner, status */
                    102:   unsigned long   buf1sz:11,      /* size of buffer 1 */
                    103:     buf2sz:11,                    /* size of buffer 2 */
                    104:     control:10;                   /* control bits */
                    105:   const unsigned char *buf1addr;  /* buffer 1 address */
                    106:   const unsigned char *buf2addr;  /* buffer 2 address */
                    107: };
                    108: 
                    109: struct rxdesc {
                    110:   volatile unsigned long   status;         /* owner, status */
                    111:   unsigned long   buf1sz:11,      /* size of buffer 1 */
                    112:     buf2sz:11,                    /* size of buffer 2 */
                    113:     control:10;                   /* control bits */
                    114:   unsigned char   *buf1addr;      /* buffer 1 address */
                    115:   unsigned char   *buf2addr;      /* buffer 2 address */
                    116: };
                    117: 
                    118: /* Size of transmit and receive buffers */
                    119: #define BUFLEN 1536
                    120: 
                    121: /*********************************************************************/
                    122: /* Global Storage                                                    */
                    123: /*********************************************************************/
                    124: 
                    125: static struct nic_operations davicom_operations;
                    126: 
                    127: /* PCI Bus parameters */
                    128: static unsigned short vendor, dev_id;
                    129: static unsigned long ioaddr;
                    130: 
                    131: /* Note: transmit and receive buffers must be longword aligned and
                    132:    longword divisable */
                    133: 
                    134: /* transmit descriptor and buffer */
                    135: #define NTXD 2
                    136: #define NRXD 4
                    137: struct {
                    138:        struct txdesc txd[NTXD] __attribute__ ((aligned(4)));
                    139:        unsigned char txb[BUFLEN] __attribute__ ((aligned(4)));
                    140:        struct rxdesc rxd[NRXD] __attribute__ ((aligned(4)));
                    141:        unsigned char rxb[NRXD * BUFLEN] __attribute__ ((aligned(4)));
                    142: } davicom_bufs __shared;
                    143: #define txd davicom_bufs.txd
                    144: #define txb davicom_bufs.txb
                    145: #define rxd davicom_bufs.rxd
                    146: #define rxb davicom_bufs.rxb
                    147: static int rxd_tail;
                    148: static int TxPtr;
                    149: 
                    150: 
                    151: /*********************************************************************/
                    152: /* Function Prototypes                                               */
                    153: /*********************************************************************/
                    154: static void whereami(const char *str);
                    155: static int read_eeprom(unsigned long ioaddr, int location, int addr_len);
                    156: static int davicom_probe(struct nic *nic,struct pci_device *pci);
                    157: static void davicom_init_chain(struct nic *nic);       /* Sten 10/9 */
                    158: static void davicom_reset(struct nic *nic);
                    159: static void davicom_transmit(struct nic *nic, const char *d, unsigned int t,
                    160:                           unsigned int s, const char *p);
                    161: static int davicom_poll(struct nic *nic, int retrieve);
                    162: static void davicom_disable(struct nic *nic);
                    163: static void davicom_wait(unsigned int nticks);
                    164: static int phy_read(int);
                    165: static void phy_write(int, u16);
                    166: static void phy_write_1bit(u32, u32);
                    167: static int phy_read_1bit(u32);
                    168: static void davicom_media_chk(struct nic *);
                    169: 
                    170: 
                    171: /*********************************************************************/
                    172: /* Utility Routines                                                  */
                    173: /*********************************************************************/
                    174: static inline void whereami(const char *str)
                    175: {
                    176:   DBGP("%s\n", str);
                    177:   /* sleep(2); */
                    178: }
                    179: 
                    180: static void davicom_wait(unsigned int nticks)
                    181: {
                    182:   unsigned int to = currticks() + nticks;
                    183:   while (currticks() < to)
                    184:     /* wait */ ;
                    185: }
                    186: 
                    187: 
                    188: /*********************************************************************/
                    189: /* For DAVICOM phyxcer register by MII interface                    */
                    190: /*********************************************************************/
                    191: /*
                    192:   Read a word data from phy register
                    193: */
                    194: static int phy_read(int location)
                    195: {
                    196:  int i, phy_addr=1;
                    197:  u16 phy_data;
                    198:  u32 io_dcr9;
                    199: 
                    200:  whereami("phy_read\n");
                    201: 
                    202:  io_dcr9 = ioaddr + CSR9;
                    203: 
                    204:  /* Send 33 synchronization clock to Phy controller */
                    205:  for (i=0; i<34; i++)
                    206:      phy_write_1bit(io_dcr9, PHY_DATA_1);
                    207: 
                    208:  /* Send start command(01) to Phy */
                    209:  phy_write_1bit(io_dcr9, PHY_DATA_0);
                    210:  phy_write_1bit(io_dcr9, PHY_DATA_1);
                    211: 
                    212:  /* Send read command(10) to Phy */
                    213:  phy_write_1bit(io_dcr9, PHY_DATA_1);
                    214:  phy_write_1bit(io_dcr9, PHY_DATA_0);
                    215: 
                    216:  /* Send Phy addres */
                    217:  for (i=0x10; i>0; i=i>>1)
                    218:      phy_write_1bit(io_dcr9, phy_addr&i ? PHY_DATA_1: PHY_DATA_0);
                    219:    
                    220:  /* Send register addres */
                    221:  for (i=0x10; i>0; i=i>>1)
                    222:      phy_write_1bit(io_dcr9, location&i ? PHY_DATA_1: PHY_DATA_0);
                    223: 
                    224:  /* Skip transition state */
                    225:  phy_read_1bit(io_dcr9);
                    226: 
                    227:  /* read 16bit data */
                    228:  for (phy_data=0, i=0; i<16; i++) {
                    229:    phy_data<<=1;
                    230:    phy_data|=phy_read_1bit(io_dcr9);
                    231:  }
                    232: 
                    233:  return phy_data;
                    234: }
                    235: 
                    236: /*
                    237:   Write a word to Phy register
                    238: */
                    239: static void phy_write(int location, u16 phy_data)
                    240: {
                    241:  u16 i, phy_addr=1;
                    242:  u32 io_dcr9; 
                    243: 
                    244:  whereami("phy_write\n");
                    245: 
                    246:  io_dcr9 = ioaddr + CSR9;
                    247: 
                    248:  /* Send 33 synchronization clock to Phy controller */
                    249:  for (i=0; i<34; i++)
                    250:    phy_write_1bit(io_dcr9, PHY_DATA_1);
                    251: 
                    252:  /* Send start command(01) to Phy */
                    253:  phy_write_1bit(io_dcr9, PHY_DATA_0);
                    254:  phy_write_1bit(io_dcr9, PHY_DATA_1);
                    255: 
                    256:  /* Send write command(01) to Phy */
                    257:  phy_write_1bit(io_dcr9, PHY_DATA_0);
                    258:  phy_write_1bit(io_dcr9, PHY_DATA_1);
                    259: 
                    260:  /* Send Phy addres */
                    261:  for (i=0x10; i>0; i=i>>1)
                    262:    phy_write_1bit(io_dcr9, phy_addr&i ? PHY_DATA_1: PHY_DATA_0);
                    263: 
                    264:  /* Send register addres */
                    265:  for (i=0x10; i>0; i=i>>1)
                    266:    phy_write_1bit(io_dcr9, location&i ? PHY_DATA_1: PHY_DATA_0);
                    267: 
                    268:  /* written trasnition */
                    269:  phy_write_1bit(io_dcr9, PHY_DATA_1);
                    270:  phy_write_1bit(io_dcr9, PHY_DATA_0);
                    271: 
                    272:  /* Write a word data to PHY controller */
                    273:  for (i=0x8000; i>0; i>>=1)
                    274:    phy_write_1bit(io_dcr9, phy_data&i ? PHY_DATA_1: PHY_DATA_0);
                    275: }
                    276: 
                    277: /*
                    278:   Write one bit data to Phy Controller
                    279: */
                    280: static void phy_write_1bit(u32 ee_addr, u32 phy_data)
                    281: {
                    282:  whereami("phy_write_1bit\n");
                    283:  outl(phy_data, ee_addr);                        /* MII Clock Low */
                    284:  eeprom_delay();
                    285:  outl(phy_data|MDCLKH, ee_addr);                 /* MII Clock High */
                    286:  eeprom_delay();
                    287:  outl(phy_data, ee_addr);                        /* MII Clock Low */
                    288:  eeprom_delay();
                    289: }
                    290: 
                    291: /*
                    292:   Read one bit phy data from PHY controller
                    293: */
                    294: static int phy_read_1bit(u32 ee_addr)
                    295: {
                    296:  int phy_data;
                    297: 
                    298:  whereami("phy_read_1bit\n");
                    299: 
                    300:  outl(0x50000, ee_addr);
                    301:  eeprom_delay();
                    302: 
                    303:  phy_data=(inl(ee_addr)>>19) & 0x1;
                    304: 
                    305:  outl(0x40000, ee_addr);
                    306:  eeprom_delay();
                    307: 
                    308:  return phy_data;
                    309: }
                    310: 
                    311: /*
                    312:   DM9801/DM9802 present check and program 
                    313: */
                    314: static void HPNA_process(void)
                    315: {
                    316: 
                    317:  if ( (phy_read(3) & 0xfff0) == 0xb900 ) {
                    318:    if ( phy_read(31) == 0x4404 ) {
                    319:      /* DM9801 present */
                    320:      if (phy_read(3) == 0xb901)
                    321:        phy_write(16, 0x5);     /* DM9801 E4 */
                    322:      else
                    323:        phy_write(16, 0x1005); /* DM9801 E3 and others */
                    324:      phy_write(25, ((phy_read(24) + 3) & 0xff) | 0xf000);
                    325:    } else {
                    326:      /* DM9802 present */
                    327:      phy_write(16, 0x5);
                    328:      phy_write(25, (phy_read(25) & 0xff00) + 2);
                    329:    }
                    330:  }
                    331: }
                    332: 
                    333: /*
                    334:   Sense media mode and set CR6
                    335: */
                    336: static void davicom_media_chk(struct nic * nic __unused)
                    337: {
                    338:   unsigned long to, csr6;
                    339: 
                    340:   csr6 = 0x00200000;   /* SF */
                    341:   outl(csr6, ioaddr + CSR6);
                    342: 
                    343: #define        PCI_DEVICE_ID_DM9009            0x9009
                    344:   if (vendor == PCI_VENDOR_ID_DAVICOM && dev_id == PCI_DEVICE_ID_DM9009) {
                    345:     /* Set to 10BaseT mode for DM9009 */
                    346:     phy_write(0, 0);
                    347:   } else {
                    348:     /* For DM9102/DM9102A */
                    349:     to = currticks() + 2 * TICKS_PER_SEC;
                    350:     while ( ((phy_read(1) & 0x24)!=0x24) && (currticks() < to))
                    351:       /* wait */ ;
                    352: 
                    353:     if ( (phy_read(1) & 0x24) == 0x24 ) {
                    354:       if (phy_read(17) & 0xa000)  
                    355:         csr6 |= 0x00000200;    /* Full Duplex mode */
                    356:     } else
                    357:       csr6 |= 0x00040000; /* Select DM9801/DM9802 when Ethernet link failed */
                    358:   }
                    359: 
                    360:   /* set the chip's operating mode */
                    361:   outl(csr6, ioaddr + CSR6);
                    362: 
                    363:   /* DM9801/DM9802 present check & program */
                    364:   if (csr6 & 0x40000)
                    365:     HPNA_process();
                    366: }
                    367: 
                    368: 
                    369: /*********************************************************************/
                    370: /* EEPROM Reading Code                                               */
                    371: /*********************************************************************/
                    372: /* EEPROM routines adapted from the Linux Tulip Code */
                    373: /* Reading a serial EEPROM is a "bit" grungy, but we work our way
                    374:    through:->.
                    375: */
                    376: static int read_eeprom(unsigned long ioaddr, int location, int addr_len)
                    377: {
                    378:   int i;
                    379:   unsigned short retval = 0;
                    380:   long ee_addr = ioaddr + CSR9;
                    381:   int read_cmd = location | EE_READ_CMD;
                    382: 
                    383:   whereami("read_eeprom\n");
                    384: 
                    385:   outl(EE_ENB & ~EE_CS, ee_addr);
                    386:   outl(EE_ENB, ee_addr);
                    387: 
                    388:   /* Shift the read command bits out. */
                    389:   for (i = 4 + addr_len; i >= 0; i--) {
                    390:     short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
                    391:     outl(EE_ENB | dataval, ee_addr);
                    392:     eeprom_delay();
                    393:     outl(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
                    394:     eeprom_delay();
                    395:   }
                    396:   outl(EE_ENB, ee_addr);
                    397: 
                    398:   for (i = 16; i > 0; i--) {
                    399:     outl(EE_ENB | EE_SHIFT_CLK, ee_addr);
                    400:     eeprom_delay();
                    401:     retval = (retval << 1) | ((inl(ee_addr) & EE_DATA_READ) ? 1 : 0);
                    402:     outl(EE_ENB, ee_addr);
                    403:     eeprom_delay();
                    404:   }
                    405: 
                    406:   /* Terminate the EEPROM access. */
                    407:   outl(EE_ENB & ~EE_CS, ee_addr);
                    408:   return retval;
                    409: }
                    410: 
                    411: /*********************************************************************/
                    412: /* davicom_init_chain - setup the tx and rx descriptors                */
                    413: /* Sten 10/9                                                        */
                    414: /*********************************************************************/
                    415: static void davicom_init_chain(struct nic *nic)
                    416: {
                    417:   int i;
                    418: 
                    419:   /* setup the transmit descriptor */
                    420:   /* Sten: Set 2 TX descriptor but use one TX buffer because
                    421:           it transmit a packet and wait complete every time. */
                    422:   for (i=0; i<NTXD; i++) {
                    423:     txd[i].buf1addr = (void *)virt_to_bus(&txb[0]);    /* Used same TX buffer */
                    424:     txd[i].buf2addr = (void *)virt_to_bus(&txd[i+1]);  /*  Point to Next TX desc */
                    425:     txd[i].buf1sz   = 0;
                    426:     txd[i].buf2sz   = 0;
                    427:     txd[i].control  = 0x184;           /* Begin/End/Chain */
                    428:     txd[i].status   = 0x00000000;      /* give ownership to Host */
                    429:   }
                    430: 
                    431:   /* construct perfect filter frame with mac address as first match
                    432:      and broadcast address for all others */
                    433:   for (i=0; i<192; i++) txb[i] = 0xFF;
                    434:   txb[0] = nic->node_addr[0];
                    435:   txb[1] = nic->node_addr[1];
                    436:   txb[4] = nic->node_addr[2];
                    437:   txb[5] = nic->node_addr[3];
                    438:   txb[8] = nic->node_addr[4];
                    439:   txb[9] = nic->node_addr[5];
                    440: 
                    441:   /* setup receive descriptor */
                    442:   for (i=0; i<NRXD; i++) {
                    443:     rxd[i].buf1addr = (void *)virt_to_bus(&rxb[i * BUFLEN]);
                    444:     rxd[i].buf2addr = (void *)virt_to_bus(&rxd[i+1]); /* Point to Next RX desc */
                    445:     rxd[i].buf1sz   = BUFLEN;
                    446:     rxd[i].buf2sz   = 0;        /* not used */
                    447:     rxd[i].control  = 0x4;             /* Chain Structure */
                    448:     rxd[i].status   = 0x80000000;   /* give ownership to device */
                    449:   }
                    450: 
                    451:   /* Chain the last descriptor to first */
                    452:   txd[NTXD - 1].buf2addr = (void *)virt_to_bus(&txd[0]);
                    453:   rxd[NRXD - 1].buf2addr = (void *)virt_to_bus(&rxd[0]);
                    454:   TxPtr = 0;
                    455:   rxd_tail = 0;
                    456: }
                    457: 
                    458: 
                    459: /*********************************************************************/
                    460: /* davicom_reset - Reset adapter                                         */
                    461: /*********************************************************************/
                    462: static void davicom_reset(struct nic *nic)
                    463: {
                    464:   unsigned long to;
                    465: 
                    466:   whereami("davicom_reset\n");
                    467: 
                    468:   /* Stop Tx and RX */
                    469:   outl(inl(ioaddr + CSR6) & ~0x00002002, ioaddr + CSR6);
                    470: 
                    471:   /* Reset the chip, holding bit 0 set at least 50 PCI cycles. */
                    472:   outl(0x00000001, ioaddr + CSR0);
                    473: 
                    474:   davicom_wait(TICKS_PER_SEC);
                    475: 
                    476:   /* TX/RX descriptor burst */
                    477:   outl(0x0C00000, ioaddr + CSR0);      /* Sten 10/9 */
                    478: 
                    479:   /* set up transmit and receive descriptors */
                    480:   davicom_init_chain(nic);     /* Sten 10/9 */
                    481: 
                    482:   /* Point to receive descriptor */
                    483:   outl(virt_to_bus(&rxd[0]), ioaddr + CSR3);
                    484:   outl(virt_to_bus(&txd[0]), ioaddr + CSR4);   /* Sten 10/9 */
                    485: 
                    486:   /* According phyxcer media mode to set CR6,
                    487:      DM9102/A phyxcer can auto-detect media mode */
                    488:   davicom_media_chk(nic);
                    489: 
                    490:   /* Prepare Setup Frame Sten 10/9 */
                    491:   txd[TxPtr].buf1sz = 192;
                    492:   txd[TxPtr].control = 0x024;          /* SF/CE */
                    493:   txd[TxPtr].status = 0x80000000;      /* Give ownership to device */
                    494: 
                    495:   /* Start Tx */
                    496:   outl(inl(ioaddr + CSR6) | 0x00002000, ioaddr + CSR6);
                    497:   /* immediate transmit demand */
                    498:   outl(0, ioaddr + CSR1);
                    499: 
                    500:   to = currticks() + TX_TIME_OUT;
                    501:   while ((txd[TxPtr].status & 0x80000000) && (currticks() < to)) /* Sten 10/9 */
                    502:     /* wait */ ;
                    503: 
                    504:   if (currticks() >= to) {
                    505:     DBG ("TX Setup Timeout!\n");
                    506:   }
                    507:   /* Point to next TX descriptor */
                    508:  TxPtr = (++TxPtr >= NTXD) ? 0:TxPtr;  /* Sten 10/9 */
                    509: 
                    510:   DBG("txd.status = %lX\n", txd[TxPtr].status);
                    511:   DBG("ticks = %ld\n", currticks() - (to - TX_TIME_OUT));
                    512:   DBG_MORE();
                    513: 
                    514:   /* enable RX */
                    515:   outl(inl(ioaddr + CSR6) | 0x00000002, ioaddr + CSR6);
                    516:   /* immediate poll demand */
                    517:   outl(0, ioaddr + CSR2);
                    518: }
                    519: 
                    520: 
                    521: /*********************************************************************/
                    522: /* eth_transmit - Transmit a frame                                   */
                    523: /*********************************************************************/
                    524: static void davicom_transmit(struct nic *nic, const char *d, unsigned int t,
                    525:                            unsigned int s, const char *p)
                    526: {
                    527:   unsigned long to;
                    528: 
                    529:   whereami("davicom_transmit\n");
                    530: 
                    531:   /* Stop Tx */
                    532:   /* outl(inl(ioaddr + CSR6) & ~0x00002000, ioaddr + CSR6); */
                    533: 
                    534:   /* setup ethernet header */
                    535:   memcpy(&txb[0], d, ETH_ALEN);        /* DA 6byte */
                    536:   memcpy(&txb[ETH_ALEN], nic->node_addr, ETH_ALEN); /* SA 6byte*/
                    537:   txb[ETH_ALEN*2] = (t >> 8) & 0xFF; /* Frame type: 2byte */
                    538:   txb[ETH_ALEN*2+1] = t & 0xFF;
                    539:   memcpy(&txb[ETH_HLEN], p, s); /* Frame data */
                    540: 
                    541:   /* setup the transmit descriptor */
                    542:   txd[TxPtr].buf1sz   = ETH_HLEN+s;
                    543:   txd[TxPtr].control  = 0x00000184;      /* LS+FS+CE */
                    544:   txd[TxPtr].status   = 0x80000000;      /* give ownership to device */
                    545: 
                    546:   /* immediate transmit demand */
                    547:   outl(0, ioaddr + CSR1);
                    548: 
                    549:   to = currticks() + TX_TIME_OUT;
                    550:   while ((txd[TxPtr].status & 0x80000000) && (currticks() < to))
                    551:     /* wait */ ;
                    552: 
                    553:   if (currticks() >= to) {
                    554:     DBG ("TX Timeout!\n");
                    555:   }
                    556:  
                    557:   /* Point to next TX descriptor */
                    558:   TxPtr = (++TxPtr >= NTXD) ? 0:TxPtr; /* Sten 10/9 */
                    559: 
                    560: }
                    561: 
                    562: /*********************************************************************/
                    563: /* eth_poll - Wait for a frame                                       */
                    564: /*********************************************************************/
                    565: static int davicom_poll(struct nic *nic, int retrieve)
                    566: {
                    567:   whereami("davicom_poll\n");
                    568: 
                    569:   if (rxd[rxd_tail].status & 0x80000000)
                    570:     return 0;
                    571: 
                    572:   if ( ! retrieve ) return 1;
                    573: 
                    574:   whereami("davicom_poll got one\n");
                    575: 
                    576:   nic->packetlen = (rxd[rxd_tail].status & 0x3FFF0000) >> 16;
                    577: 
                    578:   if( rxd[rxd_tail].status & 0x00008000){
                    579:       rxd[rxd_tail].status = 0x80000000;
                    580:       rxd_tail++;
                    581:       if (rxd_tail == NRXD) rxd_tail = 0;
                    582:       return 0;
                    583:   }
                    584: 
                    585:   /* copy packet to working buffer */
                    586:   /* XXX - this copy could be avoided with a little more work
                    587:      but for now we are content with it because the optimised
                    588:      memcpy is quite fast */
                    589: 
                    590:   memcpy(nic->packet, rxb + rxd_tail * BUFLEN, nic->packetlen);
                    591: 
                    592:   /* return the descriptor and buffer to receive ring */
                    593:   rxd[rxd_tail].status = 0x80000000;
                    594:   rxd_tail++;
                    595:   if (rxd_tail == NRXD) rxd_tail = 0;
                    596: 
                    597:   return 1;
                    598: }
                    599: 
                    600: /*********************************************************************/
                    601: /* eth_disable - Disable the interface                               */
                    602: /*********************************************************************/
                    603: static void davicom_disable ( struct nic *nic ) {
                    604: 
                    605:   whereami("davicom_disable\n");
                    606: 
                    607:   davicom_reset(nic);
                    608: 
                    609:   /* disable interrupts */
                    610:   outl(0x00000000, ioaddr + CSR7);
                    611: 
                    612:   /* Stop the chip's Tx and Rx processes. */
                    613:   outl(inl(ioaddr + CSR6) & ~0x00002002, ioaddr + CSR6);
                    614: 
                    615:   /* Clear the missed-packet counter. */
                    616:   inl(ioaddr + CSR8);
                    617: }
                    618: 
                    619: 
                    620: /*********************************************************************/
                    621: /* eth_irq - enable, disable and force interrupts                    */
                    622: /*********************************************************************/
                    623: static void davicom_irq(struct nic *nic __unused, irq_action_t action __unused)
                    624: {
                    625:   switch ( action ) {
                    626:   case DISABLE :
                    627:     break;
                    628:   case ENABLE :
                    629:     break;
                    630:   case FORCE :
                    631:     break;
                    632:   }
                    633: }
                    634: 
                    635: 
                    636: /*********************************************************************/
                    637: /* eth_probe - Look for an adapter                                   */
                    638: /*********************************************************************/
                    639: static int davicom_probe ( struct nic *nic, struct pci_device *pci ) {
                    640: 
                    641:   unsigned int i;
                    642: 
                    643:   whereami("davicom_probe\n");
                    644: 
                    645:   if (pci->ioaddr == 0)
                    646:     return 0;
                    647: 
                    648:   vendor  = pci->vendor;
                    649:   dev_id  = pci->device;
                    650:   ioaddr  = pci->ioaddr;
                    651: 
                    652:   nic->ioaddr = pci->ioaddr;
                    653:   nic->irqno = 0;
                    654: 
                    655:   /* wakeup chip */
                    656:   pci_write_config_dword(pci, 0x40, 0x00000000);
                    657: 
                    658:   /* Stop the chip's Tx and Rx processes. */
                    659:   outl(inl(ioaddr + CSR6) & ~0x00002002, ioaddr + CSR6);
                    660: 
                    661:   /* Clear the missed-packet counter. */
                    662:   inl(ioaddr + CSR8);
                    663: 
                    664:   /* Get MAC Address */
                    665:   /* read EEPROM data */
                    666:   for (i = 0; i < sizeof(ee_data)/2; i++)
                    667:     ((unsigned short *)ee_data)[i] =
                    668:         le16_to_cpu(read_eeprom(ioaddr, i, EEPROM_ADDRLEN));
                    669: 
                    670:   /* extract MAC address from EEPROM buffer */
                    671:   for (i=0; i<ETH_ALEN; i++)
                    672:     nic->node_addr[i] = ee_data[20+i];
                    673: 
                    674:   DBG ( "Davicom %s at IOADDR %4.4lx\n", eth_ntoa ( nic->node_addr ), ioaddr );
                    675: 
                    676:   /* initialize device */
                    677:   davicom_reset(nic);
                    678:   nic->nic_op  = &davicom_operations;
                    679:   return 1;
                    680: }
                    681: 
                    682: static struct nic_operations davicom_operations = {
                    683:        .connect        = dummy_connect,
                    684:        .poll           = davicom_poll,
                    685:        .transmit       = davicom_transmit,
                    686:        .irq            = davicom_irq,
                    687: 
                    688: };
                    689: 
                    690: static struct pci_device_id davicom_nics[] = {
                    691: PCI_ROM(0x1282, 0x9100, "davicom9100", "Davicom 9100", 0),
                    692: PCI_ROM(0x1282, 0x9102, "davicom9102", "Davicom 9102", 0),
                    693: PCI_ROM(0x1282, 0x9009, "davicom9009", "Davicom 9009", 0),
                    694: PCI_ROM(0x1282, 0x9132, "davicom9132", "Davicom 9132", 0),     /* Needs probably some fixing */
                    695: };
                    696: 
                    697: PCI_DRIVER ( davicom_driver, davicom_nics, PCI_NO_CLASS );
                    698: 
                    699: DRIVER ( "DAVICOM", nic_driver, pci_driver, davicom_driver,
                    700:         davicom_probe, davicom_disable );
                    701: 
                    702: /*
                    703:  * Local variables:
                    704:  *  c-basic-offset: 8
                    705:  *  c-indent-level: 8
                    706:  *  tab-width: 8
                    707:  * End:
                    708:  */

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