1/* 2 * linux/drivers/net/am79c961.c 3 * 4 * by Russell King <rmk@arm.linux.org.uk> 1995-2001. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * Derived from various things including skeleton.c 11 * 12 * This is a special driver for the am79c961A Lance chip used in the 13 * Intel (formally Digital Equipment Corp) EBSA110 platform. Please 14 * note that this can not be built as a module (it doesn't make sense). 15 */ 16#include <linux/kernel.h> 17#include <linux/types.h> 18#include <linux/interrupt.h> 19#include <linux/ioport.h> 20#include <linux/slab.h> 21#include <linux/string.h> 22#include <linux/errno.h> 23#include <linux/netdevice.h> 24#include <linux/etherdevice.h> 25#include <linux/delay.h> 26#include <linux/init.h> 27#include <linux/crc32.h> 28#include <linux/bitops.h> 29#include <linux/platform_device.h> 30#include <linux/io.h> 31 32#include <mach/hardware.h> 33#include <asm/system.h> 34 35#define TX_BUFFERS 15 36#define RX_BUFFERS 25 37 38#include "am79c961a.h" 39 40static irqreturn_t 41am79c961_interrupt (int irq, void *dev_id); 42 43static unsigned int net_debug = NET_DEBUG; 44 45static const char version[] = 46 "am79c961 ethernet driver (C) 1995-2001 Russell King v0.04\n"; 47 48/* --------------------------------------------------------------------------- */ 49 50#ifdef __arm__ 51static void write_rreg(u_long base, u_int reg, u_int val) 52{ 53 __asm__( 54 "str%?h %1, [%2] @ NET_RAP\n\t" 55 "str%?h %0, [%2, #-4] @ NET_RDP" 56 : 57 : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464)); 58} 59 60static inline unsigned short read_rreg(u_long base_addr, u_int reg) 61{ 62 unsigned short v; 63 __asm__( 64 "str%?h %1, [%2] @ NET_RAP\n\t" 65 "ldr%?h %0, [%2, #-4] @ NET_RDP" 66 : "=r" (v) 67 : "r" (reg), "r" (ISAIO_BASE + 0x0464)); 68 return v; 69} 70 71static inline void write_ireg(u_long base, u_int reg, u_int val) 72{ 73 __asm__( 74 "str%?h %1, [%2] @ NET_RAP\n\t" 75 "str%?h %0, [%2, #8] @ NET_IDP" 76 : 77 : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464)); 78} 79 80static inline unsigned short read_ireg(u_long base_addr, u_int reg) 81{ 82 u_short v; 83 __asm__( 84 "str%?h %1, [%2] @ NAT_RAP\n\t" 85 "ldr%?h %0, [%2, #8] @ NET_IDP\n\t" 86 : "=r" (v) 87 : "r" (reg), "r" (ISAIO_BASE + 0x0464)); 88 return v; 89} 90 91#define am_writeword(dev,off,val) __raw_writew(val, ISAMEM_BASE + ((off) << 1)) 92#define am_readword(dev,off) __raw_readw(ISAMEM_BASE + ((off) << 1)) 93 94static inline void 95am_writebuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length) 96{ 97 offset = ISAMEM_BASE + (offset << 1); 98 length = (length + 1) & ~1; 99 if ((int)buf & 2) { 100 __asm__ __volatile__("str%?h %2, [%0], #4" 101 : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8))); 102 buf += 2; 103 length -= 2; 104 } 105 while (length > 8) { 106 unsigned int tmp, tmp2; 107 __asm__ __volatile__( 108 "ldm%?ia %1!, {%2, %3}\n\t" 109 "str%?h %2, [%0], #4\n\t" 110 "mov%? %2, %2, lsr #16\n\t" 111 "str%?h %2, [%0], #4\n\t" 112 "str%?h %3, [%0], #4\n\t" 113 "mov%? %3, %3, lsr #16\n\t" 114 "str%?h %3, [%0], #4" 115 : "=&r" (offset), "=&r" (buf), "=r" (tmp), "=r" (tmp2) 116 : "0" (offset), "1" (buf)); 117 length -= 8; 118 } 119 while (length > 0) { 120 __asm__ __volatile__("str%?h %2, [%0], #4" 121 : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8))); 122 buf += 2; 123 length -= 2; 124 } 125} 126 127static inline void 128am_readbuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length) 129{ 130 offset = ISAMEM_BASE + (offset << 1); 131 length = (length + 1) & ~1; 132 if ((int)buf & 2) { 133 unsigned int tmp; 134 __asm__ __volatile__( 135 "ldr%?h %2, [%0], #4\n\t" 136 "str%?b %2, [%1], #1\n\t" 137 "mov%? %2, %2, lsr #8\n\t" 138 "str%?b %2, [%1], #1" 139 : "=&r" (offset), "=&r" (buf), "=r" (tmp): "0" (offset), "1" (buf)); 140 length -= 2; 141 } 142 while (length > 8) { 143 unsigned int tmp, tmp2, tmp3; 144 __asm__ __volatile__( 145 "ldr%?h %2, [%0], #4\n\t" 146 "ldr%?h %3, [%0], #4\n\t" 147 "orr%? %2, %2, %3, lsl #16\n\t" 148 "ldr%?h %3, [%0], #4\n\t" 149 "ldr%?h %4, [%0], #4\n\t" 150 "orr%? %3, %3, %4, lsl #16\n\t" 151 "stm%?ia %1!, {%2, %3}" 152 : "=&r" (offset), "=&r" (buf), "=r" (tmp), "=r" (tmp2), "=r" (tmp3) 153 : "0" (offset), "1" (buf)); 154 length -= 8; 155 } 156 while (length > 0) { 157 unsigned int tmp; 158 __asm__ __volatile__( 159 "ldr%?h %2, [%0], #4\n\t" 160 "str%?b %2, [%1], #1\n\t" 161 "mov%? %2, %2, lsr #8\n\t" 162 "str%?b %2, [%1], #1" 163 : "=&r" (offset), "=&r" (buf), "=r" (tmp) : "0" (offset), "1" (buf)); 164 length -= 2; 165 } 166} 167#else 168#error Not compatible 169#endif 170 171static int 172am79c961_ramtest(struct net_device *dev, unsigned int val) 173{ 174 unsigned char *buffer = kmalloc (65536, GFP_KERNEL); 175 int i, error = 0, errorcount = 0; 176 177 if (!buffer) 178 return 0; 179 memset (buffer, val, 65536); 180 am_writebuffer(dev, 0, buffer, 65536); 181 memset (buffer, val ^ 255, 65536); 182 am_readbuffer(dev, 0, buffer, 65536); 183 for (i = 0; i < 65536; i++) { 184 if (buffer[i] != val && !error) { 185 printk ("%s: buffer error (%02X %02X) %05X - ", dev->name, val, buffer[i], i); 186 error = 1; 187 errorcount ++; 188 } else if (error && buffer[i] == val) { 189 printk ("%05X\n", i); 190 error = 0; 191 } 192 } 193 if (error) 194 printk ("10000\n"); 195 kfree (buffer); 196 return errorcount; 197} 198 199static void 200am79c961_init_for_open(struct net_device *dev) 201{ 202 struct dev_priv *priv = netdev_priv(dev); 203 unsigned long flags; 204 unsigned char *p; 205 u_int hdr_addr, first_free_addr; 206 int i; 207 208 /* 209 * Stop the chip. 210 */ 211 spin_lock_irqsave(&priv->chip_lock, flags); 212 write_rreg (dev->base_addr, CSR0, CSR0_BABL|CSR0_CERR|CSR0_MISS|CSR0_MERR|CSR0_TINT|CSR0_RINT|CSR0_STOP); 213 spin_unlock_irqrestore(&priv->chip_lock, flags); 214 215 write_ireg (dev->base_addr, 5, 0x00a0); /* Receive address LED */ 216 write_ireg (dev->base_addr, 6, 0x0081); /* Collision LED */ 217 write_ireg (dev->base_addr, 7, 0x0090); /* XMIT LED */ 218 write_ireg (dev->base_addr, 2, 0x0000); /* MODE register selects media */ 219 220 for (i = LADRL; i <= LADRH; i++) 221 write_rreg (dev->base_addr, i, 0); 222 223 for (i = PADRL, p = dev->dev_addr; i <= PADRH; i++, p += 2) 224 write_rreg (dev->base_addr, i, p[0] | (p[1] << 8)); 225 226 i = MODE_PORT_10BT; 227 if (dev->flags & IFF_PROMISC) 228 i |= MODE_PROMISC; 229 230 write_rreg (dev->base_addr, MODE, i); 231 write_rreg (dev->base_addr, POLLINT, 0); 232 write_rreg (dev->base_addr, SIZERXR, -RX_BUFFERS); 233 write_rreg (dev->base_addr, SIZETXR, -TX_BUFFERS); 234 235 first_free_addr = RX_BUFFERS * 8 + TX_BUFFERS * 8 + 16; 236 hdr_addr = 0; 237 238 priv->rxhead = 0; 239 priv->rxtail = 0; 240 priv->rxhdr = hdr_addr; 241 242 for (i = 0; i < RX_BUFFERS; i++) { 243 priv->rxbuffer[i] = first_free_addr; 244 am_writeword (dev, hdr_addr, first_free_addr); 245 am_writeword (dev, hdr_addr + 2, RMD_OWN); 246 am_writeword (dev, hdr_addr + 4, (-1600)); 247 am_writeword (dev, hdr_addr + 6, 0); 248 first_free_addr += 1600; 249 hdr_addr += 8; 250 } 251 priv->txhead = 0; 252 priv->txtail = 0; 253 priv->txhdr = hdr_addr; 254 for (i = 0; i < TX_BUFFERS; i++) { 255 priv->txbuffer[i] = first_free_addr; 256 am_writeword (dev, hdr_addr, first_free_addr); 257 am_writeword (dev, hdr_addr + 2, TMD_STP|TMD_ENP); 258 am_writeword (dev, hdr_addr + 4, 0xf000); 259 am_writeword (dev, hdr_addr + 6, 0); 260 first_free_addr += 1600; 261 hdr_addr += 8; 262 } 263 264 write_rreg (dev->base_addr, BASERXL, priv->rxhdr); 265 write_rreg (dev->base_addr, BASERXH, 0); 266 write_rreg (dev->base_addr, BASETXL, priv->txhdr); 267 write_rreg (dev->base_addr, BASERXH, 0); 268 write_rreg (dev->base_addr, CSR0, CSR0_STOP); 269 write_rreg (dev->base_addr, CSR3, CSR3_IDONM|CSR3_BABLM|CSR3_DXSUFLO); 270 write_rreg (dev->base_addr, CSR4, CSR4_APAD_XMIT|CSR4_MFCOM|CSR4_RCVCCOM|CSR4_TXSTRTM|CSR4_JABM); 271 write_rreg (dev->base_addr, CSR0, CSR0_IENA|CSR0_STRT); 272} 273 274static void am79c961_timer(unsigned long data) 275{ 276 struct net_device *dev = (struct net_device *)data; 277 struct dev_priv *priv = netdev_priv(dev); 278 unsigned int lnkstat, carrier; 279 280 lnkstat = read_ireg(dev->base_addr, ISALED0) & ISALED0_LNKST; 281 carrier = netif_carrier_ok(dev); 282 283 if (lnkstat && !carrier) { 284 netif_carrier_on(dev); 285 printk("%s: link up\n", dev->name); 286 } else if (!lnkstat && carrier) { 287 netif_carrier_off(dev); 288 printk("%s: link down\n", dev->name); 289 } 290 291 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(500)); 292} 293 294/* 295 * Open/initialize the board. 296 */ 297static int 298am79c961_open(struct net_device *dev) 299{ 300 struct dev_priv *priv = netdev_priv(dev); 301 int ret; 302 303 memset (&priv->stats, 0, sizeof (priv->stats)); 304 305 ret = request_irq(dev->irq, am79c961_interrupt, 0, dev->name, dev); 306 if (ret) 307 return ret; 308 309 am79c961_init_for_open(dev); 310 311 netif_carrier_off(dev); 312 313 priv->timer.expires = jiffies; 314 add_timer(&priv->timer); 315 316 netif_start_queue(dev); 317 318 return 0; 319} 320 321/* 322 * The inverse routine to am79c961_open(). 323 */ 324static int 325am79c961_close(struct net_device *dev) 326{ 327 struct dev_priv *priv = netdev_priv(dev); 328 unsigned long flags; 329 330 del_timer_sync(&priv->timer); 331 332 netif_stop_queue(dev); 333 netif_carrier_off(dev); 334 335 spin_lock_irqsave(&priv->chip_lock, flags); 336 write_rreg (dev->base_addr, CSR0, CSR0_STOP); 337 write_rreg (dev->base_addr, CSR3, CSR3_MASKALL); 338 spin_unlock_irqrestore(&priv->chip_lock, flags); 339 340 free_irq (dev->irq, dev); 341 342 return 0; 343} 344 345/* 346 * Get the current statistics. 347 */ 348static struct net_device_stats *am79c961_getstats (struct net_device *dev) 349{ 350 struct dev_priv *priv = netdev_priv(dev); 351 return &priv->stats; 352} 353 354static void am79c961_mc_hash(char *addr, unsigned short *hash) 355{ 356 if (addr[0] & 0x01) { 357 int idx, bit; 358 u32 crc; 359 360 crc = ether_crc_le(ETH_ALEN, addr); 361 362 idx = crc >> 30; 363 bit = (crc >> 26) & 15; 364 365 hash[idx] |= 1 << bit; 366 } 367} 368 369/* 370 * Set or clear promiscuous/multicast mode filter for this adapter. 371 */ 372static void am79c961_setmulticastlist (struct net_device *dev) 373{ 374 struct dev_priv *priv = netdev_priv(dev); 375 unsigned long flags; 376 unsigned short multi_hash[4], mode; 377 int i, stopped; 378 379 mode = MODE_PORT_10BT; 380 381 if (dev->flags & IFF_PROMISC) { 382 mode |= MODE_PROMISC; 383 } else if (dev->flags & IFF_ALLMULTI) { 384 memset(multi_hash, 0xff, sizeof(multi_hash)); 385 } else { 386 struct netdev_hw_addr *ha; 387 388 memset(multi_hash, 0x00, sizeof(multi_hash)); 389 390 netdev_for_each_mc_addr(ha, dev) 391 am79c961_mc_hash(ha->addr, multi_hash); 392 } 393 394 spin_lock_irqsave(&priv->chip_lock, flags); 395 396 stopped = read_rreg(dev->base_addr, CSR0) & CSR0_STOP; 397 398 if (!stopped) { 399 /* 400 * Put the chip into suspend mode 401 */ 402 write_rreg(dev->base_addr, CTRL1, CTRL1_SPND); 403 404 /* 405 * Spin waiting for chip to report suspend mode 406 */ 407 while ((read_rreg(dev->base_addr, CTRL1) & CTRL1_SPND) == 0) { 408 spin_unlock_irqrestore(&priv->chip_lock, flags); 409 nop(); 410 spin_lock_irqsave(&priv->chip_lock, flags); 411 } 412 } 413 414 /* 415 * Update the multicast hash table 416 */ 417 for (i = 0; i < ARRAY_SIZE(multi_hash); i++) 418 write_rreg(dev->base_addr, i + LADRL, multi_hash[i]); 419 420 /* 421 * Write the mode register 422 */ 423 write_rreg(dev->base_addr, MODE, mode); 424 425 if (!stopped) { 426 /* 427 * Put the chip back into running mode 428 */ 429 write_rreg(dev->base_addr, CTRL1, 0); 430 } 431 432 spin_unlock_irqrestore(&priv->chip_lock, flags); 433} 434 435static void am79c961_timeout(struct net_device *dev) 436{ 437 printk(KERN_WARNING "%s: transmit timed out, network cable problem?\n", 438 dev->name); 439 440 /* 441 * ought to do some setup of the tx side here 442 */ 443 444 netif_wake_queue(dev); 445} 446 447/* 448 * Transmit a packet 449 */ 450static int 451am79c961_sendpacket(struct sk_buff *skb, struct net_device *dev) 452{ 453 struct dev_priv *priv = netdev_priv(dev); 454 unsigned int hdraddr, bufaddr; 455 unsigned int head; 456 unsigned long flags; 457 458 head = priv->txhead; 459 hdraddr = priv->txhdr + (head << 3); 460 bufaddr = priv->txbuffer[head]; 461 head += 1; 462 if (head >= TX_BUFFERS) 463 head = 0; 464 465 am_writebuffer (dev, bufaddr, skb->data, skb->len); 466 am_writeword (dev, hdraddr + 4, -skb->len); 467 am_writeword (dev, hdraddr + 2, TMD_OWN|TMD_STP|TMD_ENP); 468 priv->txhead = head; 469 470 spin_lock_irqsave(&priv->chip_lock, flags); 471 write_rreg (dev->base_addr, CSR0, CSR0_TDMD|CSR0_IENA); 472 spin_unlock_irqrestore(&priv->chip_lock, flags); 473 474 /* 475 * If the next packet is owned by the ethernet device, 476 * then the tx ring is full and we can't add another 477 * packet. 478 */ 479 if (am_readword(dev, priv->txhdr + (priv->txhead << 3) + 2) & TMD_OWN) 480 netif_stop_queue(dev); 481 482 dev_kfree_skb(skb); 483 484 return NETDEV_TX_OK; 485} 486 487/* 488 * If we have a good packet(s), get it/them out of the buffers. 489 */ 490static void 491am79c961_rx(struct net_device *dev, struct dev_priv *priv) 492{ 493 do { 494 struct sk_buff *skb; 495 u_int hdraddr; 496 u_int pktaddr; 497 u_int status; 498 int len; 499 500 hdraddr = priv->rxhdr + (priv->rxtail << 3); 501 pktaddr = priv->rxbuffer[priv->rxtail]; 502 503 status = am_readword (dev, hdraddr + 2); 504 if (status & RMD_OWN) /* do we own it? */ 505 break; 506 507 priv->rxtail ++; 508 if (priv->rxtail >= RX_BUFFERS) 509 priv->rxtail = 0; 510 511 if ((status & (RMD_ERR|RMD_STP|RMD_ENP)) != (RMD_STP|RMD_ENP)) { 512 am_writeword (dev, hdraddr + 2, RMD_OWN); 513 priv->stats.rx_errors ++; 514 if (status & RMD_ERR) { 515 if (status & RMD_FRAM) 516 priv->stats.rx_frame_errors ++; 517 if (status & RMD_CRC) 518 priv->stats.rx_crc_errors ++; 519 } else if (status & RMD_STP) 520 priv->stats.rx_length_errors ++; 521 continue; 522 } 523 524 len = am_readword(dev, hdraddr + 6); 525 skb = dev_alloc_skb(len + 2); 526 527 if (skb) { 528 skb_reserve(skb, 2); 529 530 am_readbuffer(dev, pktaddr, skb_put(skb, len), len); 531 am_writeword(dev, hdraddr + 2, RMD_OWN); 532 skb->protocol = eth_type_trans(skb, dev); 533 netif_rx(skb); 534 priv->stats.rx_bytes += len; 535 priv->stats.rx_packets ++; 536 } else { 537 am_writeword (dev, hdraddr + 2, RMD_OWN); 538 printk (KERN_WARNING "%s: memory squeeze, dropping packet.\n", dev->name); 539 priv->stats.rx_dropped ++; 540 break; 541 } 542 } while (1); 543} 544 545/* 546 * Update stats for the transmitted packet 547 */ 548static void 549am79c961_tx(struct net_device *dev, struct dev_priv *priv) 550{ 551 do { 552 short len; 553 u_int hdraddr; 554 u_int status; 555 556 hdraddr = priv->txhdr + (priv->txtail << 3); 557 status = am_readword (dev, hdraddr + 2); 558 if (status & TMD_OWN) 559 break; 560 561 priv->txtail ++; 562 if (priv->txtail >= TX_BUFFERS) 563 priv->txtail = 0; 564 565 if (status & TMD_ERR) { 566 u_int status2; 567 568 priv->stats.tx_errors ++; 569 570 status2 = am_readword (dev, hdraddr + 6); 571 572 /* 573 * Clear the error byte 574 */ 575 am_writeword (dev, hdraddr + 6, 0); 576 577 if (status2 & TST_RTRY) 578 priv->stats.collisions += 16; 579 if (status2 & TST_LCOL) 580 priv->stats.tx_window_errors ++; 581 if (status2 & TST_LCAR) 582 priv->stats.tx_carrier_errors ++; 583 if (status2 & TST_UFLO) 584 priv->stats.tx_fifo_errors ++; 585 continue; 586 } 587 priv->stats.tx_packets ++; 588 len = am_readword (dev, hdraddr + 4); 589 priv->stats.tx_bytes += -len; 590 } while (priv->txtail != priv->txhead); 591 592 netif_wake_queue(dev); 593} 594 595static irqreturn_t 596am79c961_interrupt(int irq, void *dev_id) 597{ 598 struct net_device *dev = (struct net_device *)dev_id; 599 struct dev_priv *priv = netdev_priv(dev); 600 u_int status, n = 100; 601 int handled = 0; 602 603 do { 604 status = read_rreg(dev->base_addr, CSR0); 605 write_rreg(dev->base_addr, CSR0, status & 606 (CSR0_IENA|CSR0_TINT|CSR0_RINT| 607 CSR0_MERR|CSR0_MISS|CSR0_CERR|CSR0_BABL)); 608 609 if (status & CSR0_RINT) { 610 handled = 1; 611 am79c961_rx(dev, priv); 612 } 613 if (status & CSR0_TINT) { 614 handled = 1; 615 am79c961_tx(dev, priv); 616 } 617 if (status & CSR0_MISS) { 618 handled = 1; 619 priv->stats.rx_dropped ++; 620 } 621 if (status & CSR0_CERR) { 622 handled = 1; 623 mod_timer(&priv->timer, jiffies); 624 } 625 } while (--n && status & (CSR0_RINT | CSR0_TINT)); 626 627 return IRQ_RETVAL(handled); 628} 629 630#ifdef CONFIG_NET_POLL_CONTROLLER 631static void am79c961_poll_controller(struct net_device *dev) 632{ 633 unsigned long flags; 634 local_irq_save(flags); 635 am79c961_interrupt(dev->irq, dev); 636 local_irq_restore(flags); 637} 638#endif 639 640/* 641 * Initialise the chip. Note that we always expect 642 * to be entered with interrupts enabled. 643 */ 644static int 645am79c961_hw_init(struct net_device *dev) 646{ 647 struct dev_priv *priv = netdev_priv(dev); 648 649 spin_lock_irq(&priv->chip_lock); 650 write_rreg (dev->base_addr, CSR0, CSR0_STOP); 651 write_rreg (dev->base_addr, CSR3, CSR3_MASKALL); 652 spin_unlock_irq(&priv->chip_lock); 653 654 am79c961_ramtest(dev, 0x66); 655 am79c961_ramtest(dev, 0x99); 656 657 return 0; 658} 659 660static void __init am79c961_banner(void) 661{ 662 static unsigned version_printed; 663 664 if (net_debug && version_printed++ == 0) 665 printk(KERN_INFO "%s", version); 666} 667static const struct net_device_ops am79c961_netdev_ops = { 668 .ndo_open = am79c961_open, 669 .ndo_stop = am79c961_close, 670 .ndo_start_xmit = am79c961_sendpacket, 671 .ndo_get_stats = am79c961_getstats, 672 .ndo_set_multicast_list = am79c961_setmulticastlist, 673 .ndo_tx_timeout = am79c961_timeout, 674 .ndo_validate_addr = eth_validate_addr, 675 .ndo_change_mtu = eth_change_mtu, 676 .ndo_set_mac_address = eth_mac_addr, 677#ifdef CONFIG_NET_POLL_CONTROLLER 678 .ndo_poll_controller = am79c961_poll_controller, 679#endif 680}; 681 682static int __devinit am79c961_probe(struct platform_device *pdev) 683{ 684 struct resource *res; 685 struct net_device *dev; 686 struct dev_priv *priv; 687 int i, ret; 688 689 res = platform_get_resource(pdev, IORESOURCE_IO, 0); 690 if (!res) 691 return -ENODEV; 692 693 dev = alloc_etherdev(sizeof(struct dev_priv)); 694 ret = -ENOMEM; 695 if (!dev) 696 goto out; 697 698 SET_NETDEV_DEV(dev, &pdev->dev); 699 700 priv = netdev_priv(dev); 701 702 /* 703 * Fixed address and IRQ lines here. 704 * The PNP initialisation should have been 705 * done by the ether bootp loader. 706 */ 707 dev->base_addr = res->start; 708 ret = platform_get_irq(pdev, 0); 709 710 if (ret < 0) { 711 ret = -ENODEV; 712 goto nodev; 713 } 714 dev->irq = ret; 715 716 ret = -ENODEV; 717 if (!request_region(dev->base_addr, 0x18, dev->name)) 718 goto nodev; 719 720 /* 721 * Reset the device. 722 */ 723 inb(dev->base_addr + NET_RESET); 724 udelay(5); 725 726 /* 727 * Check the manufacturer part of the 728 * ether address. 729 */ 730 if (inb(dev->base_addr) != 0x08 || 731 inb(dev->base_addr + 2) != 0x00 || 732 inb(dev->base_addr + 4) != 0x2b) 733 goto release; 734 735 for (i = 0; i < 6; i++) 736 dev->dev_addr[i] = inb(dev->base_addr + i * 2) & 0xff; 737 738 am79c961_banner(); 739 740 spin_lock_init(&priv->chip_lock); 741 init_timer(&priv->timer); 742 priv->timer.data = (unsigned long)dev; 743 priv->timer.function = am79c961_timer; 744 745 if (am79c961_hw_init(dev)) 746 goto release; 747 748 dev->netdev_ops = &am79c961_netdev_ops; 749 750 ret = register_netdev(dev); 751 if (ret == 0) { 752 printk(KERN_INFO "%s: ether address %pM\n", 753 dev->name, dev->dev_addr); 754 return 0; 755 } 756 757release: 758 release_region(dev->base_addr, 0x18); 759nodev: 760 free_netdev(dev); 761out: 762 return ret; 763} 764 765static struct platform_driver am79c961_driver = { 766 .probe = am79c961_probe, 767 .driver = { 768 .name = "am79c961", 769 }, 770}; 771 772static int __init am79c961_init(void) 773{ 774 return platform_driver_register(&am79c961_driver); 775} 776 777__initcall(am79c961_init); 778