[16a384cf] | 1 | /* ne2k.c -- RTEMS NE2000 Ethernet driver. |
---|
| 2 | * Written by Ian Lance Taylor, Zembu Labs. |
---|
| 3 | * October, 1998. |
---|
| 4 | * |
---|
| 5 | * The license and distribution terms for this file may be |
---|
| 6 | * found in found in the file LICENSE in this distribution or at |
---|
| 7 | * http://www.OARcorp.com/rtems/license.html. |
---|
| 8 | * |
---|
| 9 | * $Id$ |
---|
| 10 | * |
---|
| 11 | * Both the ne2000 and the wd80x3 are based on the National Semiconductor |
---|
| 12 | * 8390 chip, so there is a fair amount of overlap between the two |
---|
| 13 | * drivers. It would be possible in principle to combine some code into |
---|
| 14 | * a separate set of subroutines called by both. In fact, the drivers in |
---|
| 15 | * both OpenBSD and Linux work this way. I didn't bother, because for |
---|
| 16 | * the relatively simple drivers used by RTEMS, the overlap is not |
---|
| 17 | * especially large, and any reasonable use of subroutines would lead to |
---|
| 18 | * slightly less efficient code. |
---|
| 19 | |
---|
| 20 | * This ne2000 driver uses two transmit buffers. While one packet is |
---|
| 21 | * being transmitted over the Ethernet, RTEMS will upload another. Since |
---|
| 22 | * uploading a packet to the ne2000 is rather slow, I don't think there |
---|
| 23 | * is any point to having more than two transmit buffers. However, the |
---|
| 24 | * code does make it possible, by changing NE_TX_BUFS, although that |
---|
| 25 | * would of course reduce the number of receive buffers. |
---|
| 26 | * |
---|
| 27 | * I suspect that the wd80x3 driver would benefit slightly from copying |
---|
| 28 | * the multiple transmit buffer code. However, I have no way to test |
---|
| 29 | * that. |
---|
| 30 | */ |
---|
| 31 | |
---|
| 32 | #include <bsp.h> |
---|
| 33 | #include <wd80x3.h> |
---|
| 34 | |
---|
| 35 | #include <stdio.h> |
---|
| 36 | #include <assert.h> |
---|
| 37 | |
---|
| 38 | #include <rtems/error.h> |
---|
| 39 | #include <rtems/rtems_bsdnet.h> |
---|
| 40 | |
---|
| 41 | #include <sys/param.h> |
---|
| 42 | #include <sys/mbuf.h> |
---|
| 43 | #include <sys/socket.h> |
---|
| 44 | #include <sys/sockio.h> |
---|
| 45 | |
---|
| 46 | #include <net/if.h> |
---|
| 47 | |
---|
| 48 | #include <netinet/in.h> |
---|
| 49 | #include <netinet/if_ether.h> |
---|
| 50 | |
---|
| 51 | #include <irq.h> |
---|
| 52 | |
---|
| 53 | /* Define this to force byte-wide data transfers with the NIC. This |
---|
| 54 | is needed for boards like the TS-1325 386EX PC, which support only |
---|
| 55 | an 8-bit PC/104 bus. Undefine this on a normal PC.*/ |
---|
| 56 | |
---|
| 57 | /* #define NE2000_BYTE_TRANSFERS */ |
---|
| 58 | |
---|
| 59 | /* Define this to print debugging messages with printk. */ |
---|
| 60 | |
---|
| 61 | /* #define DEBUG_NE2000 */ |
---|
| 62 | |
---|
| 63 | /* We expect to be able to read a complete packet into an mbuf. */ |
---|
| 64 | |
---|
| 65 | #if (MCLBYTES < 1520) |
---|
| 66 | # error "Driver must have MCLBYTES >= 1520" |
---|
| 67 | #endif |
---|
| 68 | |
---|
| 69 | /* The 8390 macro definitions in wd80x3.h expect RO to be defined. */ |
---|
| 70 | #define RO 0 |
---|
| 71 | |
---|
| 72 | /* Minimum size of Ethernet packet. */ |
---|
| 73 | #define ET_MINLEN 60 |
---|
| 74 | |
---|
| 75 | /* The number of NE2000 devices supported by this driver. */ |
---|
| 76 | |
---|
| 77 | #define NNEDRIVER 1 |
---|
| 78 | |
---|
| 79 | /* RTEMS event number used by the interrupt handler to signal the |
---|
| 80 | driver task. This must not be any of the events used by the |
---|
| 81 | network task synchronization. */ |
---|
| 82 | #define INTERRUPT_EVENT RTEMS_EVENT_1 |
---|
| 83 | |
---|
| 84 | /* RTEMS event number used to start the transmit daemon. This must |
---|
| 85 | not be the same as INTERRUPT_EVENT. */ |
---|
| 86 | #define START_TRANSMIT_EVENT RTEMS_EVENT_2 |
---|
| 87 | |
---|
| 88 | /* Interrupts we want to handle from the device. */ |
---|
| 89 | |
---|
| 90 | #define NE_INTERRUPTS \ |
---|
| 91 | (MSK_PRX | MSK_PTX | MSK_RXE | MSK_TXE | MSK_OVW | MSK_CNT) |
---|
| 92 | |
---|
| 93 | /* The size of a page in device memory. */ |
---|
| 94 | |
---|
| 95 | #define NE_PAGE_SIZE (256) |
---|
| 96 | |
---|
| 97 | /* The first page address in device memory. */ |
---|
| 98 | |
---|
| 99 | #define NE_START_PAGE (0x40) |
---|
| 100 | |
---|
| 101 | /* The last page address, plus 1. */ |
---|
| 102 | |
---|
| 103 | #define NE_STOP_PAGE (0x80) |
---|
| 104 | |
---|
| 105 | /* The number of pages used for a single transmit buffer. This is |
---|
| 106 | 1536 bytes, enough for a full size packet. */ |
---|
| 107 | |
---|
| 108 | #define NE_TX_PAGES (6) |
---|
| 109 | |
---|
| 110 | /* The number of transmit buffers. We use two, so we can load one |
---|
| 111 | packet while the other is being sent. */ |
---|
| 112 | |
---|
| 113 | #define NE_TX_BUFS (2) |
---|
| 114 | |
---|
| 115 | /* We use the first pages in memory as transmit buffers, and the |
---|
| 116 | remaining ones as receive buffers. */ |
---|
| 117 | |
---|
| 118 | #define NE_FIRST_TX_PAGE (NE_START_PAGE) |
---|
| 119 | |
---|
| 120 | #define NE_FIRST_RX_PAGE (NE_FIRST_TX_PAGE + NE_TX_PAGES * NE_TX_BUFS) |
---|
| 121 | |
---|
| 122 | /* Data we store for each NE2000 device. */ |
---|
| 123 | |
---|
| 124 | struct ne_softc { |
---|
| 125 | /* The bsdnet information structure. */ |
---|
| 126 | struct arpcom arpcom; |
---|
| 127 | |
---|
| 128 | /* The interrupt request number. */ |
---|
| 129 | unsigned int irno; |
---|
| 130 | /* The base IO port number. */ |
---|
| 131 | unsigned int port; |
---|
| 132 | |
---|
| 133 | /* Whether we accept broadcasts. */ |
---|
| 134 | int accept_broadcasts; |
---|
| 135 | |
---|
| 136 | /* The thread ID of the transmit task. */ |
---|
| 137 | rtems_id tx_daemon_tid; |
---|
| 138 | /* The thread ID of the receive task. */ |
---|
| 139 | rtems_id rx_daemon_tid; |
---|
| 140 | |
---|
| 141 | /* Whether we use byte-transfers with the device. */ |
---|
| 142 | rtems_boolean byte_transfers; |
---|
| 143 | |
---|
| 144 | /* The number of memory buffers which the transmit daemon has loaded |
---|
| 145 | with data to be sent, but which have not yet been completely |
---|
| 146 | sent. */ |
---|
| 147 | int inuse; |
---|
| 148 | /* The index of the next available transmit memory buffer. */ |
---|
| 149 | int nextavail; |
---|
| 150 | /* The index of the next transmit buffer to send. */ |
---|
| 151 | int nextsend; |
---|
| 152 | /* Nonzero if the device is currently transmitting a packet. */ |
---|
| 153 | int transmitting; |
---|
| 154 | /* The length of the data stored in each transmit buffer. */ |
---|
| 155 | int sendlen[NE_TX_BUFS]; |
---|
| 156 | |
---|
| 157 | /* Set if we have a packet overrun while receiving. */ |
---|
| 158 | int overrun; |
---|
| 159 | /* Set if we should resend after an overrun. */ |
---|
| 160 | int resend; |
---|
| 161 | |
---|
| 162 | /* Statistics. */ |
---|
| 163 | struct { |
---|
| 164 | /* Number of packets received. */ |
---|
| 165 | unsigned long rx_packets; |
---|
| 166 | /* Number of packets sent. */ |
---|
| 167 | unsigned long tx_packets; |
---|
| 168 | /* Number of interrupts. */ |
---|
| 169 | unsigned long interrupts; |
---|
| 170 | /* Number of receive acknowledgements. */ |
---|
| 171 | unsigned long rx_acks; |
---|
| 172 | /* Number of transmit acknowledgements. */ |
---|
| 173 | unsigned long tx_acks; |
---|
| 174 | /* Number of packet overruns. */ |
---|
| 175 | unsigned long overruns; |
---|
| 176 | /* Number of frame errors. */ |
---|
| 177 | unsigned long rx_frame_errors; |
---|
| 178 | /* Number of CRC errors. */ |
---|
| 179 | unsigned long rx_crc_errors; |
---|
| 180 | /* Number of missed packets. */ |
---|
| 181 | unsigned long rx_missed_errors; |
---|
| 182 | } stats; |
---|
| 183 | }; |
---|
| 184 | |
---|
| 185 | /* The list of NE2000 devices on this system. */ |
---|
| 186 | |
---|
| 187 | static struct ne_softc ne_softc[NNEDRIVER]; |
---|
| 188 | |
---|
| 189 | /* Find the NE2000 device which is attached at a particular interrupt |
---|
| 190 | vector. */ |
---|
| 191 | |
---|
| 192 | static struct ne_softc * |
---|
| 193 | ne_device_for_irno (int irno) |
---|
| 194 | { |
---|
| 195 | int i; |
---|
| 196 | |
---|
| 197 | for (i = 0; i < NNEDRIVER; ++i) |
---|
| 198 | { |
---|
| 199 | if (ne_softc[i].irno == irno |
---|
| 200 | && ne_softc[i].arpcom.ac_if.if_softc != NULL) |
---|
| 201 | return &ne_softc[i]; |
---|
| 202 | } |
---|
| 203 | |
---|
| 204 | return NULL; |
---|
| 205 | } |
---|
| 206 | |
---|
| 207 | /* Read data from an NE2000 device. Read LEN bytes at ADDR, storing |
---|
| 208 | them into P. */ |
---|
| 209 | |
---|
| 210 | static void |
---|
| 211 | ne_read_data (struct ne_softc *sc, int addr, int len, unsigned char *p) |
---|
| 212 | { |
---|
| 213 | unsigned int port = sc->port; |
---|
| 214 | unsigned int dport = port + DATAPORT; |
---|
| 215 | |
---|
| 216 | outport_byte (port + CMDR, MSK_PG0 | MSK_RD2 | MSK_STA); |
---|
| 217 | outport_byte (port + RBCR0, len); |
---|
| 218 | outport_byte (port + RBCR1, len >> 8); |
---|
| 219 | outport_byte (port + RSAR0, addr); |
---|
| 220 | outport_byte (port + RSAR1, addr >> 8); |
---|
| 221 | outport_byte (port + CMDR, MSK_PG0 | MSK_RRE | MSK_STA); |
---|
| 222 | |
---|
| 223 | if (sc->byte_transfers) |
---|
| 224 | while (len > 0) { |
---|
| 225 | unsigned char d; |
---|
| 226 | |
---|
| 227 | inport_byte (dport, d); |
---|
| 228 | *p++ = d; |
---|
| 229 | len--; |
---|
| 230 | } |
---|
| 231 | else /* word transfers */ |
---|
| 232 | while (len > 0) { |
---|
| 233 | unsigned short d; |
---|
| 234 | |
---|
| 235 | inport_word (dport, d); |
---|
| 236 | *p++ = d; |
---|
| 237 | *p++ = d >> 8; |
---|
| 238 | len -= 2; |
---|
| 239 | } |
---|
| 240 | |
---|
| 241 | outport_byte (port + ISR, MSK_RDC); |
---|
| 242 | } |
---|
| 243 | |
---|
| 244 | /* Handle the current NE2000 status. This is called when the device |
---|
| 245 | signals an interrupt. It is also called at other times while |
---|
| 246 | NE2000 interrupts have been disabled. */ |
---|
| 247 | |
---|
| 248 | static void |
---|
| 249 | ne_check_status (struct ne_softc *sc) |
---|
| 250 | { |
---|
| 251 | unsigned int port = sc->port; |
---|
| 252 | unsigned char status; |
---|
| 253 | |
---|
| 254 | /* It seems that we need to use a loop here, because if the NE2000 |
---|
| 255 | signals an interrupt because packet transmission is complete, and |
---|
| 256 | then receives a packet while interrupts are disabled, it seems to |
---|
| 257 | sometimes fail to signal the interrupt for the received packet |
---|
| 258 | when interrupts are reenabled. (Based on the behaviour of the |
---|
| 259 | Realtek 8019AS chip). */ |
---|
| 260 | |
---|
| 261 | while (1) { |
---|
| 262 | inport_byte (port + ISR, status); |
---|
| 263 | if (status == 0) |
---|
| 264 | break; |
---|
| 265 | |
---|
| 266 | #ifdef DEBUG_NE2000 |
---|
| 267 | printk ("NE2000 status 0x%x (8259 enabled: %s; mask: %x)\n", status, |
---|
| 268 | i8259s_cache & (1 << sc->irno) ? "no" : "yes", |
---|
| 269 | i8259s_cache); |
---|
| 270 | #endif |
---|
| 271 | |
---|
| 272 | /* Check for incoming packet overwrite. */ |
---|
| 273 | if (status & MSK_OVW) { |
---|
| 274 | unsigned char status2; |
---|
| 275 | |
---|
| 276 | ++sc->stats.overruns; |
---|
| 277 | outport_byte (port + CMDR, MSK_PG0 | MSK_STP | MSK_RD2); |
---|
| 278 | Wait_X_ms (2); |
---|
| 279 | outport_byte (port + RBCR0, 0); |
---|
| 280 | outport_byte (port + RBCR1, 0); |
---|
| 281 | inport_byte (port + ISR, status2); |
---|
| 282 | status |= status2 & (MSK_PTX | MSK_TXE); |
---|
| 283 | outport_byte (port + TCR, MSK_LOOP); |
---|
| 284 | outport_byte (port + CMDR, MSK_PG0 | MSK_STA | MSK_RD2); |
---|
| 285 | sc->overrun = 1; |
---|
| 286 | if ((status & (MSK_PTX | MSK_TXE)) == 0) |
---|
| 287 | sc->resend = 1; |
---|
| 288 | rtems_event_send (sc->rx_daemon_tid, INTERRUPT_EVENT); |
---|
| 289 | } |
---|
| 290 | |
---|
| 291 | /* Check for transmitted packet. The transmit daemon may now be |
---|
| 292 | able to send another packet to the device. */ |
---|
| 293 | if ((status & (MSK_PTX | MSK_TXE)) != 0) { |
---|
| 294 | ++sc->stats.tx_acks; |
---|
| 295 | outport_byte (port + ISR, status & (MSK_PTX | MSK_TXE)); |
---|
| 296 | --sc->inuse; |
---|
| 297 | sc->transmitting = 0; |
---|
| 298 | if (sc->inuse > 0 || (sc->arpcom.ac_if.if_flags & IFF_OACTIVE) != 0) |
---|
| 299 | rtems_event_send (sc->tx_daemon_tid, START_TRANSMIT_EVENT); |
---|
| 300 | } |
---|
| 301 | |
---|
| 302 | /* Check for received packet. */ |
---|
| 303 | if ((status & (MSK_PRX | MSK_RXE)) != 0) { |
---|
| 304 | ++sc->stats.rx_acks; |
---|
| 305 | outport_byte (port + ISR, status & (MSK_PRX | MSK_RXE)); |
---|
| 306 | rtems_event_send (sc->rx_daemon_tid, INTERRUPT_EVENT); |
---|
| 307 | } |
---|
| 308 | |
---|
| 309 | /* Check for counter change. */ |
---|
| 310 | if ((status & MSK_CNT) != 0) { |
---|
| 311 | unsigned char add; |
---|
| 312 | |
---|
| 313 | inport_byte (port + CNTR0, add); |
---|
| 314 | sc->stats.rx_frame_errors += add; |
---|
| 315 | inport_byte (port + CNTR1, add); |
---|
| 316 | sc->stats.rx_crc_errors += add; |
---|
| 317 | inport_byte (port + CNTR2, add); |
---|
| 318 | sc->stats.rx_missed_errors += add; |
---|
| 319 | outport_byte (port + ISR, MSK_CNT); |
---|
| 320 | } |
---|
| 321 | } |
---|
| 322 | |
---|
| 323 | outport_byte (port + CMDR, MSK_PG0 | MSK_STA | MSK_RD2); |
---|
| 324 | } |
---|
| 325 | |
---|
| 326 | /* Handle an NE2000 interrupt. */ |
---|
| 327 | |
---|
| 328 | static rtems_isr |
---|
| 329 | ne_interrupt_handler (rtems_vector_number v) |
---|
| 330 | { |
---|
| 331 | struct ne_softc *sc; |
---|
| 332 | |
---|
| 333 | sc = ne_device_for_irno (v); |
---|
| 334 | if (sc == NULL) |
---|
| 335 | return; |
---|
| 336 | |
---|
| 337 | ++sc->stats.interrupts; |
---|
| 338 | |
---|
| 339 | ne_check_status (sc); |
---|
| 340 | } |
---|
| 341 | |
---|
| 342 | /* Turn NE2000 interrupts on. */ |
---|
| 343 | |
---|
| 344 | static void |
---|
| 345 | ne_interrupt_on (const rtems_irq_connect_data *irq) |
---|
| 346 | { |
---|
| 347 | struct ne_softc *sc; |
---|
| 348 | |
---|
| 349 | #ifdef DEBUG_NE2000 |
---|
| 350 | printk ("ne_interrupt_on\n"); |
---|
| 351 | #endif |
---|
| 352 | sc = ne_device_for_irno (irq->name); |
---|
| 353 | if (sc != NULL) |
---|
| 354 | outport_byte (sc->port + IMR, NE_INTERRUPTS); |
---|
| 355 | } |
---|
| 356 | |
---|
| 357 | /* Turn NE2000 interrupts off. See ne_interrupt_on. */ |
---|
| 358 | |
---|
| 359 | static void |
---|
| 360 | ne_interrupt_off (const rtems_irq_connect_data *irq) |
---|
| 361 | { |
---|
| 362 | struct ne_softc *sc; |
---|
| 363 | |
---|
| 364 | #ifdef DEBUG_NE2000 |
---|
| 365 | printk ("ne_interrupt_off\n"); |
---|
| 366 | #endif |
---|
| 367 | sc = ne_device_for_irno (irq->name); |
---|
| 368 | if (sc != NULL) |
---|
| 369 | outport_byte (sc->port + IMR, 0); |
---|
| 370 | } |
---|
| 371 | |
---|
| 372 | /* Return whether NE2000 interrupts are on. */ |
---|
| 373 | |
---|
| 374 | static int |
---|
| 375 | ne_interrupt_is_on (const rtems_irq_connect_data *irq) |
---|
| 376 | { |
---|
| 377 | return BSP_irq_enabled_at_i8259s (irq->name); |
---|
| 378 | } |
---|
| 379 | |
---|
| 380 | /* Initialize the NE2000 hardware. */ |
---|
| 381 | |
---|
| 382 | static void |
---|
| 383 | ne_init_hardware (struct ne_softc *sc) |
---|
| 384 | { |
---|
| 385 | unsigned int port = sc->port; |
---|
| 386 | int i; |
---|
| 387 | rtems_irq_connect_data irq; |
---|
| 388 | |
---|
| 389 | #ifdef DEBUG_NE2000 |
---|
| 390 | printk ("ne_init_hardware\n"); |
---|
| 391 | #endif |
---|
| 392 | |
---|
| 393 | /* Initialize registers. */ |
---|
| 394 | |
---|
| 395 | outport_byte (port + CMDR, MSK_PG0 | MSK_RD2 | MSK_STP); |
---|
| 396 | |
---|
| 397 | if (sc->byte_transfers) { |
---|
| 398 | outport_byte (port + DCR, MSK_FT10 | MSK_BMS); |
---|
| 399 | } |
---|
| 400 | else { |
---|
| 401 | outport_byte (port + DCR, MSK_FT10 | MSK_BMS | MSK_WTS); |
---|
| 402 | } |
---|
| 403 | |
---|
| 404 | outport_byte (port + RBCR0, 0); |
---|
| 405 | outport_byte (port + RBCR1, 0); |
---|
| 406 | outport_byte (port + RCR, MSK_MON); |
---|
| 407 | outport_byte (port + TCR, MSK_LOOP); |
---|
| 408 | outport_byte (port + IMR, 0); |
---|
| 409 | outport_byte (port + ISR, 0xff); |
---|
| 410 | outport_byte (port + PSTOP, NE_STOP_PAGE); |
---|
| 411 | outport_byte (port + PSTART, NE_FIRST_RX_PAGE); |
---|
| 412 | outport_byte (port + BNRY, NE_STOP_PAGE - 1); |
---|
| 413 | |
---|
| 414 | /* Set the Ethernet hardware address. */ |
---|
| 415 | |
---|
| 416 | outport_byte (port + CMDR, MSK_PG1 | MSK_RD2); |
---|
| 417 | for (i = 0; i < ETHER_ADDR_LEN; ++i) |
---|
| 418 | outport_byte (port + PAR + i, sc->arpcom.ac_enaddr[i]); |
---|
| 419 | |
---|
| 420 | #ifdef DEBUG_NE2000 |
---|
| 421 | printk ("Using ethernet address: "); |
---|
| 422 | for (i = 0; i < ETHER_ADDR_LEN; ++i) |
---|
| 423 | printk("%x ",sc->arpcom.ac_enaddr[i]); |
---|
| 424 | printk ("\n"); |
---|
| 425 | #endif |
---|
| 426 | |
---|
| 427 | /* Clear the multicast address. */ |
---|
| 428 | for (i = 0; i < MARsize; ++i) |
---|
| 429 | outport_byte (port + MAR + i, 0); |
---|
| 430 | |
---|
| 431 | outport_byte (port + CURR, NE_FIRST_RX_PAGE); |
---|
| 432 | |
---|
| 433 | outport_byte (port + CMDR, MSK_PG0 | MSK_RD2); |
---|
| 434 | |
---|
| 435 | /* Put the device on line. */ |
---|
| 436 | outport_byte (port + CMDR, MSK_PG0 | MSK_STA | MSK_RD2); |
---|
| 437 | |
---|
| 438 | /* Set up interrupts. */ |
---|
| 439 | |
---|
| 440 | irq.name = sc->irno; |
---|
| 441 | irq.hdl = ne_interrupt_handler; |
---|
| 442 | irq.on = ne_interrupt_on; |
---|
| 443 | irq.off = ne_interrupt_off; |
---|
| 444 | irq.isOn = ne_interrupt_is_on; |
---|
| 445 | |
---|
| 446 | if (! BSP_install_rtems_irq_handler (&irq)) |
---|
| 447 | rtems_panic ("Can't attach NE interrupt handler for irq %d.\n", |
---|
| 448 | sc->irno); |
---|
| 449 | |
---|
| 450 | /* Prepare to receive packets. */ |
---|
| 451 | |
---|
| 452 | outport_byte (port + TCR, 0); |
---|
| 453 | outport_byte (port + RCR, (sc->accept_broadcasts ? MSK_AB : 0)); |
---|
| 454 | } |
---|
| 455 | |
---|
| 456 | /* The NE2000 packet receive daemon. This task is started when the |
---|
| 457 | NE2000 driver is initialized. */ |
---|
| 458 | |
---|
| 459 | static void |
---|
| 460 | ne_rx_daemon (void *arg) |
---|
| 461 | { |
---|
| 462 | struct ne_softc *sc = (struct ne_softc *) arg; |
---|
| 463 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
| 464 | unsigned int port = sc->port; |
---|
| 465 | unsigned int dport = port + DATAPORT; |
---|
| 466 | |
---|
| 467 | while (1) { |
---|
| 468 | rtems_event_set events; |
---|
| 469 | |
---|
| 470 | /* Wait for the interrupt handler to tell us that there is a |
---|
| 471 | packet ready to receive. */ |
---|
| 472 | rtems_bsdnet_event_receive (INTERRUPT_EVENT, |
---|
| 473 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
| 474 | RTEMS_NO_TIMEOUT, |
---|
| 475 | &events); |
---|
| 476 | |
---|
| 477 | /* Don't let the device interrupt us now. */ |
---|
| 478 | outport_byte (port + IMR, 0); |
---|
| 479 | |
---|
| 480 | while (1) { |
---|
| 481 | unsigned char startpage, currpage; |
---|
| 482 | unsigned short statnext, len; |
---|
| 483 | int next; |
---|
| 484 | struct mbuf *m; |
---|
| 485 | unsigned char *p; |
---|
| 486 | int startaddr; |
---|
| 487 | int toend; |
---|
| 488 | struct ether_header *eh; |
---|
| 489 | |
---|
| 490 | inport_byte (port + BNRY, startpage); |
---|
| 491 | |
---|
| 492 | outport_byte (port + CMDR, MSK_PG1 | MSK_RD2); |
---|
| 493 | inport_byte (port + CURR, currpage); |
---|
| 494 | outport_byte (port + CMDR, MSK_PG0 | MSK_RD2); |
---|
| 495 | |
---|
| 496 | ++startpage; |
---|
| 497 | if (startpage >= NE_STOP_PAGE) |
---|
| 498 | startpage = NE_FIRST_RX_PAGE; |
---|
| 499 | |
---|
| 500 | if (startpage == currpage) |
---|
| 501 | break; |
---|
| 502 | |
---|
| 503 | #ifdef DEBUG_NE2000 |
---|
| 504 | printk ("ne_rx_daemon: start page %x; current page %x\n", |
---|
| 505 | startpage, currpage); |
---|
| 506 | #endif |
---|
| 507 | |
---|
| 508 | /* Read the buffer header. This is 1 byte receive status, 1 |
---|
| 509 | byte page of next buffer, 2 bytes length. */ |
---|
| 510 | outport_byte (port + CMDR, MSK_PG0 | MSK_RD2 | MSK_STA); |
---|
| 511 | outport_byte (port + RBCR0, 4); |
---|
| 512 | outport_byte (port + RBCR1, 0); |
---|
| 513 | outport_byte (port + RSAR0, 0); |
---|
| 514 | outport_byte (port + RSAR1, startpage); |
---|
| 515 | outport_byte (port + CMDR, MSK_PG0 | MSK_RRE | MSK_STA); |
---|
| 516 | |
---|
| 517 | if (sc->byte_transfers) { |
---|
| 518 | unsigned char data; |
---|
| 519 | |
---|
| 520 | inport_byte (dport, data); /* Throw away status */ |
---|
| 521 | inport_byte (dport, data); |
---|
| 522 | next = data; |
---|
| 523 | |
---|
| 524 | inport_byte (dport, data); |
---|
| 525 | len = data; |
---|
| 526 | inport_byte (dport, data); |
---|
| 527 | len |= data << 8; |
---|
| 528 | } |
---|
| 529 | else { /* Word transfers */ |
---|
| 530 | inport_word (dport, statnext); |
---|
| 531 | inport_word (dport, len); |
---|
| 532 | |
---|
| 533 | next = statnext >> 8; |
---|
| 534 | } |
---|
| 535 | |
---|
| 536 | outport_byte (port + ISR, MSK_RDC); |
---|
| 537 | |
---|
| 538 | if (next >= NE_STOP_PAGE) |
---|
| 539 | next = NE_FIRST_RX_PAGE; |
---|
| 540 | |
---|
| 541 | /* The first four bytes of the length are the buffer header. */ |
---|
| 542 | len -= 4; |
---|
| 543 | startaddr = startpage * NE_PAGE_SIZE + 4; |
---|
| 544 | |
---|
| 545 | MGETHDR (m, M_WAIT, MT_DATA); |
---|
| 546 | MCLGET (m, M_WAIT); |
---|
| 547 | m->m_pkthdr.rcvif = ifp; |
---|
| 548 | |
---|
| 549 | p = mtod (m, unsigned char *); |
---|
| 550 | m->m_len = m->m_pkthdr.len = len - sizeof (struct ether_header); |
---|
| 551 | |
---|
| 552 | toend = NE_STOP_PAGE * NE_PAGE_SIZE - startaddr; |
---|
| 553 | if (toend < len) { |
---|
| 554 | ne_read_data (sc, startaddr, toend, p); |
---|
| 555 | p += toend; |
---|
| 556 | len -= toend; |
---|
| 557 | startaddr = NE_FIRST_RX_PAGE * NE_PAGE_SIZE; |
---|
| 558 | } |
---|
| 559 | |
---|
| 560 | if (len > 0) |
---|
| 561 | ne_read_data (sc, startaddr, len, p); |
---|
| 562 | |
---|
| 563 | eh = mtod (m, struct ether_header *); |
---|
| 564 | m->m_data += sizeof (struct ether_header); |
---|
| 565 | ether_input (ifp, eh, m); |
---|
| 566 | |
---|
| 567 | ++sc->stats.rx_packets; |
---|
| 568 | |
---|
| 569 | outport_byte (port + BNRY, next - 1); |
---|
| 570 | } |
---|
| 571 | |
---|
| 572 | if (sc->overrun) { |
---|
| 573 | outport_byte (port + ISR, MSK_OVW); |
---|
| 574 | outport_byte (port + TCR, 0); |
---|
| 575 | if (sc->resend) |
---|
| 576 | outport_byte (port + CMDR, MSK_PG0 | MSK_TXP | MSK_RD2 | MSK_STA); |
---|
| 577 | sc->resend = 0; |
---|
| 578 | sc->overrun = 0; |
---|
| 579 | } |
---|
| 580 | |
---|
| 581 | /* Reenable device interrupts. */ |
---|
| 582 | outport_byte (port + IMR, NE_INTERRUPTS); |
---|
| 583 | } |
---|
| 584 | } |
---|
| 585 | |
---|
| 586 | /* Load an NE2000 packet onto the device. */ |
---|
| 587 | |
---|
| 588 | static void |
---|
| 589 | ne_loadpacket (struct ne_softc *sc, struct mbuf *m) |
---|
| 590 | { |
---|
| 591 | unsigned int port = sc->port; |
---|
| 592 | unsigned int dport = port + DATAPORT; |
---|
| 593 | struct mbuf *mhold = m; |
---|
| 594 | int leftover; |
---|
| 595 | unsigned char leftover_data; |
---|
| 596 | int timeout; |
---|
| 597 | |
---|
| 598 | #ifdef DEBUG_NE2000 |
---|
| 599 | printk ("Uploading NE2000 packet\n"); |
---|
| 600 | #endif |
---|
| 601 | |
---|
| 602 | /* Reset remote DMA complete flag. */ |
---|
| 603 | outport_byte (port + ISR, MSK_RDC); |
---|
| 604 | |
---|
| 605 | /* Write out the count. */ |
---|
| 606 | outport_byte (port + RBCR0, m->m_pkthdr.len); |
---|
| 607 | outport_byte (port + RBCR1, m->m_pkthdr.len >> 8); |
---|
| 608 | |
---|
| 609 | sc->sendlen[sc->nextavail] = m->m_pkthdr.len; |
---|
| 610 | |
---|
| 611 | /* Tell the device which address we want to write to. */ |
---|
| 612 | outport_byte (port + RSAR0, 0); |
---|
| 613 | outport_byte (port + RSAR1, |
---|
| 614 | NE_FIRST_TX_PAGE + (sc->nextavail * NE_TX_PAGES)); |
---|
| 615 | |
---|
| 616 | /* Set up the write. */ |
---|
| 617 | outport_byte (port + CMDR, MSK_PG0 | MSK_RWR | MSK_STA); |
---|
| 618 | |
---|
| 619 | /* Transfer the mbuf chain to device memory. NE2000 devices require |
---|
| 620 | that the data be transferred as words, so we need to handle odd |
---|
| 621 | length mbufs. Never occurs if we force byte transfers. */ |
---|
| 622 | |
---|
| 623 | leftover = 0; |
---|
| 624 | leftover_data = '\0'; |
---|
| 625 | |
---|
| 626 | for (; m != NULL; m = m->m_next) { |
---|
| 627 | int len; |
---|
| 628 | unsigned char *data; |
---|
| 629 | |
---|
| 630 | len = m->m_len; |
---|
| 631 | if (len == 0) |
---|
| 632 | continue; |
---|
| 633 | |
---|
| 634 | data = mtod (m, unsigned char *); |
---|
| 635 | |
---|
| 636 | if (leftover) { |
---|
| 637 | unsigned char next; |
---|
| 638 | |
---|
| 639 | /* Data left over from previous mbuf in chain. */ |
---|
| 640 | next = *data++; |
---|
| 641 | --len; |
---|
| 642 | outport_word (dport, leftover_data | (next << 8)); |
---|
| 643 | leftover = 0; |
---|
| 644 | } |
---|
| 645 | |
---|
| 646 | /* If using byte transfers, len always ends up as zero so |
---|
| 647 | there are no leftovers. */ |
---|
| 648 | |
---|
| 649 | if (sc->byte_transfers) |
---|
| 650 | while (len > 0) { |
---|
| 651 | outport_byte (dport, *data++); |
---|
| 652 | len--; |
---|
| 653 | } |
---|
| 654 | else |
---|
| 655 | while (len > 1) { |
---|
| 656 | outport_word (dport, data[0] | (data[1] << 8)); |
---|
| 657 | data += 2; |
---|
| 658 | len -= 2; |
---|
| 659 | } |
---|
| 660 | |
---|
| 661 | if (len > 0) |
---|
| 662 | { |
---|
| 663 | leftover = 1; |
---|
| 664 | leftover_data = *data++; |
---|
| 665 | } |
---|
| 666 | } |
---|
| 667 | |
---|
| 668 | if (leftover) |
---|
| 669 | outport_word (dport, leftover_data); |
---|
| 670 | |
---|
| 671 | m_freem (mhold); |
---|
| 672 | |
---|
| 673 | /* Wait for the device to complete accepting the data, with a |
---|
| 674 | limiting counter so that we don't wait too long. */ |
---|
| 675 | for (timeout = 0; timeout < 100; ++timeout) |
---|
| 676 | { |
---|
| 677 | unsigned char status; |
---|
| 678 | |
---|
| 679 | inport_byte (port + ISR, status); |
---|
| 680 | |
---|
| 681 | #ifdef DEBUG_NE2000 |
---|
| 682 | if ((status &~ MSK_RDC) != 0) |
---|
| 683 | printk ("Status 0x%x while waiting for acknowledgement of uploaded packet\n", |
---|
| 684 | status); |
---|
| 685 | #endif |
---|
| 686 | |
---|
| 687 | if ((status & MSK_RDC) != 0) { |
---|
| 688 | outport_byte (port + ISR, MSK_RDC); |
---|
| 689 | break; |
---|
| 690 | } |
---|
| 691 | } |
---|
| 692 | |
---|
| 693 | if (timeout >= 100) |
---|
| 694 | printk ("Timed out waiting for acknowledgement of uploaded NE2000 packet\n"); |
---|
| 695 | |
---|
| 696 | ++sc->nextavail; |
---|
| 697 | if (sc->nextavail == NE_TX_BUFS) |
---|
| 698 | sc->nextavail = 0; |
---|
| 699 | } |
---|
| 700 | |
---|
| 701 | /* Tell the NE2000 to transmit a buffer whose contents we have already |
---|
| 702 | loaded onto the device. */ |
---|
| 703 | |
---|
| 704 | static void |
---|
| 705 | ne_transmit (struct ne_softc *sc) |
---|
| 706 | { |
---|
| 707 | unsigned int port = sc->port; |
---|
| 708 | int len; |
---|
| 709 | |
---|
| 710 | #ifdef DEBUG_NE2000 |
---|
| 711 | printk ("Transmitting NE2000 packet\n"); |
---|
| 712 | #endif |
---|
| 713 | |
---|
| 714 | len = sc->sendlen[sc->nextsend]; |
---|
| 715 | if (len < ET_MINLEN) |
---|
| 716 | len = ET_MINLEN; |
---|
| 717 | outport_byte (port + TBCR0, len); |
---|
| 718 | outport_byte (port + TBCR1, len >> 8); |
---|
| 719 | |
---|
| 720 | outport_byte (port + TPSR, NE_FIRST_TX_PAGE + (sc->nextsend * NE_TX_PAGES)); |
---|
| 721 | |
---|
| 722 | outport_byte (port + CMDR, MSK_PG0 | MSK_TXP | MSK_RD2 | MSK_STA); |
---|
| 723 | |
---|
| 724 | ++sc->nextsend; |
---|
| 725 | if (sc->nextsend == NE_TX_BUFS) |
---|
| 726 | sc->nextsend = 0; |
---|
| 727 | |
---|
| 728 | ++sc->stats.tx_packets; |
---|
| 729 | } |
---|
| 730 | |
---|
| 731 | /* The NE2000 packet transmit daemon. This task is started when the |
---|
| 732 | NE2000 driver is initialized. */ |
---|
| 733 | |
---|
| 734 | static void |
---|
| 735 | ne_tx_daemon (void *arg) |
---|
| 736 | { |
---|
| 737 | struct ne_softc *sc = (struct ne_softc *) arg; |
---|
| 738 | unsigned int port = sc->port; |
---|
| 739 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
| 740 | |
---|
| 741 | while (1) { |
---|
| 742 | rtems_event_set events; |
---|
| 743 | |
---|
| 744 | /* Wait for a packet to be ready for sending, or for there to be |
---|
| 745 | room for another packet in the device memory. */ |
---|
| 746 | rtems_bsdnet_event_receive (START_TRANSMIT_EVENT, |
---|
| 747 | RTEMS_EVENT_ANY | RTEMS_WAIT, |
---|
| 748 | RTEMS_NO_TIMEOUT, |
---|
| 749 | &events); |
---|
| 750 | |
---|
| 751 | #ifdef DEBUG_NE2000 |
---|
| 752 | printk ("ne_tx_daemon\n"); |
---|
| 753 | #endif |
---|
| 754 | |
---|
| 755 | /* This daemon handles both uploading data onto the device and |
---|
| 756 | telling the device to transmit data which has been uploaded. |
---|
| 757 | These are separate tasks, because while the device is |
---|
| 758 | transmitting one buffer we will upload another. */ |
---|
| 759 | |
---|
| 760 | /* Don't let the device interrupt us now. */ |
---|
| 761 | outport_byte (port + IMR, 0); |
---|
| 762 | |
---|
| 763 | while (1) { |
---|
| 764 | struct mbuf *m; |
---|
| 765 | |
---|
| 766 | /* If the device is not transmitting a packet, and we have |
---|
| 767 | uploaded a packet, tell the device to transmit it. */ |
---|
| 768 | if (! sc->transmitting && sc->inuse > 0) { |
---|
| 769 | sc->transmitting = 1; |
---|
| 770 | ne_transmit (sc); |
---|
| 771 | } |
---|
| 772 | |
---|
| 773 | /* If we don't have any more buffers to send, quit now. */ |
---|
| 774 | if (ifp->if_snd.ifq_head == NULL) { |
---|
| 775 | ifp->if_flags &= ~IFF_OACTIVE; |
---|
| 776 | break; |
---|
| 777 | } |
---|
| 778 | |
---|
| 779 | /* Allocate a buffer to load data into. If there are none |
---|
| 780 | available, quit until a buffer has been transmitted. */ |
---|
| 781 | if (sc->inuse >= NE_TX_BUFS) |
---|
| 782 | break; |
---|
| 783 | |
---|
| 784 | ++sc->inuse; |
---|
| 785 | |
---|
| 786 | IF_DEQUEUE (&ifp->if_snd, m); |
---|
| 787 | if (m == NULL) |
---|
| 788 | panic ("ne_tx_daemon"); |
---|
| 789 | |
---|
| 790 | ne_loadpacket (sc, m); |
---|
| 791 | |
---|
| 792 | /* Check the device status. It may have finished transmitting |
---|
| 793 | the last packet. */ |
---|
| 794 | ne_check_status (sc); |
---|
| 795 | } |
---|
| 796 | |
---|
| 797 | /* Reenable device interrupts. */ |
---|
| 798 | outport_byte (port + IMR, NE_INTERRUPTS); |
---|
| 799 | } |
---|
| 800 | } |
---|
| 801 | |
---|
| 802 | /* Start sending an NE2000 packet. */ |
---|
| 803 | |
---|
| 804 | static void |
---|
| 805 | ne_start (struct ifnet *ifp) |
---|
| 806 | { |
---|
| 807 | struct ne_softc *sc = ifp->if_softc; |
---|
| 808 | |
---|
| 809 | /* Tell the transmit daemon to wake up and send a packet. */ |
---|
| 810 | rtems_event_send (sc->tx_daemon_tid, START_TRANSMIT_EVENT); |
---|
| 811 | ifp->if_flags |= IFF_OACTIVE; |
---|
| 812 | } |
---|
| 813 | |
---|
| 814 | /* Initialize and start and NE2000. */ |
---|
| 815 | |
---|
| 816 | static void |
---|
| 817 | ne_init (void *arg) |
---|
| 818 | { |
---|
| 819 | struct ne_softc *sc = (struct ne_softc *) arg; |
---|
| 820 | struct ifnet *ifp = &sc->arpcom.ac_if; |
---|
| 821 | |
---|
| 822 | if (sc->tx_daemon_tid == 0) { |
---|
| 823 | sc->inuse = 0; |
---|
| 824 | sc->nextavail = 0; |
---|
| 825 | sc->nextsend = 0; |
---|
| 826 | sc->transmitting = 0; |
---|
| 827 | |
---|
| 828 | ne_init_hardware (sc); |
---|
| 829 | |
---|
| 830 | sc->tx_daemon_tid = rtems_bsdnet_newproc ("SCtx", 4096, ne_tx_daemon, sc); |
---|
| 831 | sc->rx_daemon_tid = rtems_bsdnet_newproc ("SCrx", 4096, ne_rx_daemon, sc); |
---|
| 832 | } |
---|
| 833 | |
---|
| 834 | ifp->if_flags |= IFF_RUNNING; |
---|
| 835 | } |
---|
| 836 | |
---|
| 837 | /* Stop an NE2000. */ |
---|
| 838 | |
---|
| 839 | static void |
---|
| 840 | ne_stop (struct ne_softc *sc) |
---|
| 841 | { |
---|
| 842 | unsigned int port = sc->port; |
---|
| 843 | int i; |
---|
| 844 | |
---|
| 845 | sc->arpcom.ac_if.if_flags &= ~IFF_RUNNING; |
---|
| 846 | |
---|
| 847 | /* Stop everything. */ |
---|
| 848 | outport_byte (port + CMDR, MSK_STP | MSK_RD2); |
---|
| 849 | |
---|
| 850 | /* Wait for the interface to stop, using I as a time limit. */ |
---|
| 851 | for (i = 0; i < 5000; ++i) |
---|
| 852 | { |
---|
| 853 | unsigned char status; |
---|
| 854 | |
---|
| 855 | inport_byte (port + ISR, status); |
---|
| 856 | if ((status & MSK_RST) != 0) |
---|
| 857 | break; |
---|
| 858 | } |
---|
| 859 | |
---|
| 860 | sc->inuse = 0; |
---|
| 861 | sc->nextavail = 0; |
---|
| 862 | sc->nextsend = 0; |
---|
| 863 | sc->transmitting = 0; |
---|
| 864 | } |
---|
| 865 | |
---|
| 866 | /* Show NE2000 interface statistics. */ |
---|
| 867 | |
---|
| 868 | static void |
---|
| 869 | ne_stats (struct ne_softc *sc) |
---|
| 870 | { |
---|
| 871 | printf (" Received packets: %-8lu", sc->stats.rx_packets); |
---|
| 872 | printf (" Transmitted packets: %-8lu\n", sc->stats.tx_packets); |
---|
| 873 | printf (" Receive acks: %-8lu", sc->stats.rx_acks); |
---|
| 874 | printf (" Transmit acks: %-8lu\n", sc->stats.tx_acks); |
---|
| 875 | printf (" Packet overruns: %-8lu", sc->stats.overruns); |
---|
| 876 | printf (" Frame errors: %-8lu\n", sc->stats.rx_frame_errors); |
---|
| 877 | printf (" CRC errors: %-8lu", sc->stats.rx_crc_errors); |
---|
| 878 | printf (" Missed packets: %-8lu\n", sc->stats.rx_missed_errors); |
---|
| 879 | printf (" Interrupts: %-8lu\n", sc->stats.interrupts); |
---|
| 880 | } |
---|
| 881 | |
---|
| 882 | /* NE2000 driver ioctl handler. */ |
---|
| 883 | |
---|
| 884 | static int |
---|
| 885 | ne_ioctl (struct ifnet *ifp, int command, caddr_t data) |
---|
| 886 | { |
---|
| 887 | struct ne_softc *sc = ifp->if_softc; |
---|
| 888 | int error = 0; |
---|
| 889 | |
---|
| 890 | switch (command) { |
---|
| 891 | case SIOCGIFADDR: |
---|
| 892 | case SIOCSIFADDR: |
---|
| 893 | error = ether_ioctl (ifp, command, data); |
---|
| 894 | break; |
---|
| 895 | |
---|
| 896 | case SIOCSIFFLAGS: |
---|
| 897 | switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) { |
---|
| 898 | case IFF_RUNNING: |
---|
| 899 | ne_stop (sc); |
---|
| 900 | break; |
---|
| 901 | |
---|
| 902 | case IFF_UP: |
---|
| 903 | ne_init (sc); |
---|
| 904 | break; |
---|
| 905 | |
---|
| 906 | case IFF_UP | IFF_RUNNING: |
---|
| 907 | ne_stop (sc); |
---|
| 908 | ne_init (sc); |
---|
| 909 | break; |
---|
| 910 | |
---|
| 911 | default: |
---|
| 912 | break; |
---|
| 913 | } |
---|
| 914 | break; |
---|
| 915 | |
---|
| 916 | case SIO_RTEMS_SHOW_STATS: |
---|
| 917 | ne_stats (sc); |
---|
| 918 | break; |
---|
| 919 | |
---|
| 920 | /* FIXME: Multicast commands must be added here. */ |
---|
| 921 | |
---|
| 922 | default: |
---|
| 923 | error = EINVAL; |
---|
| 924 | break; |
---|
| 925 | } |
---|
| 926 | |
---|
| 927 | return error; |
---|
| 928 | } |
---|
| 929 | |
---|
| 930 | /* Attach an NE2000 driver to the system. */ |
---|
| 931 | |
---|
| 932 | int |
---|
| 933 | rtems_ne_driver_attach (struct rtems_bsdnet_ifconfig *config) |
---|
| 934 | { |
---|
| 935 | int i; |
---|
| 936 | struct ne_softc *sc; |
---|
| 937 | struct ifnet *ifp; |
---|
| 938 | int mtu; |
---|
| 939 | |
---|
| 940 | /* Find a free driver. */ |
---|
| 941 | sc = NULL; |
---|
| 942 | for (i = 0; i < NNEDRIVER; ++i) { |
---|
| 943 | sc = &ne_softc[i]; |
---|
| 944 | ifp = &sc->arpcom.ac_if; |
---|
| 945 | if (ifp->if_softc == NULL) |
---|
| 946 | break; |
---|
| 947 | } |
---|
| 948 | |
---|
| 949 | if (sc == NULL) { |
---|
| 950 | printf ("Too many NE2000 drivers.\n"); |
---|
| 951 | return 0; |
---|
| 952 | } |
---|
| 953 | |
---|
| 954 | memset (sc, 0, sizeof *sc); |
---|
| 955 | |
---|
| 956 | /* Check whether we do byte-wide or word-wide transfers. */ |
---|
| 957 | |
---|
| 958 | #ifdef NE2000_BYTE_TRANSFERS |
---|
| 959 | sc->byte_transfers = TRUE; |
---|
| 960 | #else |
---|
| 961 | sc->byte_transfers = FALSE; |
---|
| 962 | #endif |
---|
| 963 | |
---|
| 964 | /* Handle the options passed in by the caller. */ |
---|
| 965 | |
---|
| 966 | if (config->mtu != 0) |
---|
| 967 | mtu = config->mtu; |
---|
| 968 | else |
---|
| 969 | mtu = ETHERMTU; |
---|
| 970 | |
---|
| 971 | if (config->irno != 0) |
---|
| 972 | sc->irno = config->irno; |
---|
| 973 | else { |
---|
| 974 | /* We use 5 as the default IRQ. */ |
---|
| 975 | sc->irno = 5; |
---|
| 976 | } |
---|
| 977 | |
---|
| 978 | if (config->port != 0) |
---|
| 979 | sc->port = config->port; |
---|
| 980 | else { |
---|
| 981 | /* We use 0x300 as the default IO port number. */ |
---|
| 982 | sc->port = 0x300; |
---|
| 983 | } |
---|
| 984 | |
---|
| 985 | sc->accept_broadcasts = ! config->ignore_broadcast; |
---|
| 986 | |
---|
| 987 | if (config->hardware_address != NULL) |
---|
| 988 | memcpy (sc->arpcom.ac_enaddr, config->hardware_address, |
---|
| 989 | ETHER_ADDR_LEN); |
---|
| 990 | else |
---|
| 991 | { |
---|
| 992 | unsigned char prom[16]; |
---|
| 993 | int ia; |
---|
| 994 | |
---|
| 995 | /* Read the PROM to get the Ethernet hardware address. */ |
---|
| 996 | |
---|
| 997 | outport_byte (sc->port + CMDR, MSK_PG0 | MSK_RD2 | MSK_STP); |
---|
| 998 | |
---|
| 999 | if (sc->byte_transfers) { |
---|
| 1000 | outport_byte (sc->port + DCR, MSK_FT10 | MSK_BMS); |
---|
| 1001 | } |
---|
| 1002 | else { |
---|
| 1003 | outport_byte (sc->port + DCR, MSK_FT10 | MSK_BMS | MSK_WTS); |
---|
| 1004 | } |
---|
| 1005 | |
---|
| 1006 | outport_byte (sc->port + RBCR0, 0); |
---|
| 1007 | outport_byte (sc->port + RBCR1, 0); |
---|
| 1008 | outport_byte (sc->port + RCR, MSK_MON); |
---|
| 1009 | outport_byte (sc->port + TCR, MSK_LOOP); |
---|
| 1010 | outport_byte (sc->port + IMR, 0); |
---|
| 1011 | outport_byte (sc->port + ISR, 0xff); |
---|
| 1012 | |
---|
| 1013 | ne_read_data (sc, 0, sizeof prom, prom); |
---|
| 1014 | |
---|
| 1015 | outport_byte (sc->port + CMDR, MSK_PG0 | MSK_RD2 | MSK_STP); |
---|
| 1016 | |
---|
| 1017 | for (ia = 0; ia < ETHER_ADDR_LEN; ++ia) |
---|
| 1018 | sc->arpcom.ac_enaddr[ia] = prom[ia * 2]; |
---|
| 1019 | } |
---|
| 1020 | |
---|
| 1021 | /* Set up the network interface. */ |
---|
| 1022 | |
---|
| 1023 | ifp->if_softc = sc; |
---|
| 1024 | ifp->if_unit = i + 1; |
---|
| 1025 | ifp->if_name = "ne"; |
---|
| 1026 | ifp->if_mtu = mtu; |
---|
| 1027 | ifp->if_init = ne_init; |
---|
| 1028 | ifp->if_ioctl = ne_ioctl; |
---|
| 1029 | ifp->if_start = ne_start; |
---|
| 1030 | ifp->if_output = ether_output; |
---|
| 1031 | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; |
---|
| 1032 | if (ifp->if_snd.ifq_maxlen == 0) |
---|
| 1033 | ifp->if_snd.ifq_maxlen = ifqmaxlen; |
---|
| 1034 | |
---|
| 1035 | /* Attach the interface. */ |
---|
| 1036 | |
---|
| 1037 | if_attach (ifp); |
---|
| 1038 | ether_ifattach (ifp); |
---|
| 1039 | |
---|
| 1040 | return 1; |
---|
| 1041 | } |
---|