ether1.c revision c056b734e54e12f38f34a2583a4824e6cecc16c1
1/* 2 * linux/drivers/acorn/net/ether1.c 3 * 4 * Copyright (C) 1996-2000 Russell King 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 * Acorn ether1 driver (82586 chip) for Acorn machines 11 * 12 * We basically keep two queues in the cards memory - one for transmit 13 * and one for receive. Each has a head and a tail. The head is where 14 * we/the chip adds packets to be transmitted/received, and the tail 15 * is where the transmitter has got to/where the receiver will stop. 16 * Both of these queues are circular, and since the chip is running 17 * all the time, we have to be careful when we modify the pointers etc 18 * so that the buffer memory contents is valid all the time. 19 * 20 * Change log: 21 * 1.00 RMK Released 22 * 1.01 RMK 19/03/1996 Transfers the last odd byte onto/off of the card now. 23 * 1.02 RMK 25/05/1997 Added code to restart RU if it goes not ready 24 * 1.03 RMK 14/09/1997 Cleaned up the handling of a reset during the TX interrupt. 25 * Should prevent lockup. 26 * 1.04 RMK 17/09/1997 Added more info when initialsation of chip goes wrong. 27 * TDR now only reports failure when chip reports non-zero 28 * TDR time-distance. 29 * 1.05 RMK 31/12/1997 Removed calls to dev_tint for 2.1 30 * 1.06 RMK 10/02/2000 Updated for 2.3.43 31 * 1.07 RMK 13/05/2000 Updated for 2.3.99-pre8 32 */ 33 34#include <linux/module.h> 35#include <linux/kernel.h> 36#include <linux/types.h> 37#include <linux/fcntl.h> 38#include <linux/interrupt.h> 39#include <linux/ioport.h> 40#include <linux/in.h> 41#include <linux/slab.h> 42#include <linux/string.h> 43#include <linux/errno.h> 44#include <linux/device.h> 45#include <linux/init.h> 46#include <linux/netdevice.h> 47#include <linux/etherdevice.h> 48#include <linux/skbuff.h> 49#include <linux/bitops.h> 50 51#include <asm/system.h> 52#include <asm/io.h> 53#include <asm/dma.h> 54#include <asm/ecard.h> 55 56#define __ETHER1_C 57#include "ether1.h" 58 59static unsigned int net_debug = NET_DEBUG; 60 61#define BUFFER_SIZE 0x10000 62#define TX_AREA_START 0x00100 63#define TX_AREA_END 0x05000 64#define RX_AREA_START 0x05000 65#define RX_AREA_END 0x0fc00 66 67static int ether1_open(struct net_device *dev); 68static int ether1_sendpacket(struct sk_buff *skb, struct net_device *dev); 69static irqreturn_t ether1_interrupt(int irq, void *dev_id); 70static int ether1_close(struct net_device *dev); 71static void ether1_setmulticastlist(struct net_device *dev); 72static void ether1_timeout(struct net_device *dev); 73 74/* ------------------------------------------------------------------------- */ 75 76static char version[] __devinitdata = "ether1 ethernet driver (c) 2000 Russell King v1.07\n"; 77 78#define BUS_16 16 79#define BUS_8 8 80 81/* ------------------------------------------------------------------------- */ 82 83#define DISABLEIRQS 1 84#define NORMALIRQS 0 85 86#define ether1_readw(dev, addr, type, offset, svflgs) ether1_inw_p (dev, addr + (int)(&((type *)0)->offset), svflgs) 87#define ether1_writew(dev, val, addr, type, offset, svflgs) ether1_outw_p (dev, val, addr + (int)(&((type *)0)->offset), svflgs) 88 89static inline unsigned short 90ether1_inw_p (struct net_device *dev, int addr, int svflgs) 91{ 92 unsigned long flags; 93 unsigned short ret; 94 95 if (svflgs) 96 local_irq_save (flags); 97 98 writeb(addr >> 12, REG_PAGE); 99 ret = readw(ETHER1_RAM + ((addr & 4095) << 1)); 100 if (svflgs) 101 local_irq_restore (flags); 102 return ret; 103} 104 105static inline void 106ether1_outw_p (struct net_device *dev, unsigned short val, int addr, int svflgs) 107{ 108 unsigned long flags; 109 110 if (svflgs) 111 local_irq_save (flags); 112 113 writeb(addr >> 12, REG_PAGE); 114 writew(val, ETHER1_RAM + ((addr & 4095) << 1)); 115 if (svflgs) 116 local_irq_restore (flags); 117} 118 119/* 120 * Some inline assembler to allow fast transfers on to/off of the card. 121 * Since this driver depends on some features presented by the ARM 122 * specific architecture, and that you can't configure this driver 123 * without specifiing ARM mode, this is not a problem. 124 * 125 * This routine is essentially an optimised memcpy from the card's 126 * onboard RAM to kernel memory. 127 */ 128static void 129ether1_writebuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length) 130{ 131 unsigned int page, thislen, offset; 132 void __iomem *addr; 133 134 offset = start & 4095; 135 page = start >> 12; 136 addr = ETHER1_RAM + (offset << 1); 137 138 if (offset + length > 4096) 139 thislen = 4096 - offset; 140 else 141 thislen = length; 142 143 do { 144 int used; 145 146 writeb(page, REG_PAGE); 147 length -= thislen; 148 149 __asm__ __volatile__( 150 "subs %3, %3, #2\n\ 151 bmi 2f\n\ 1521: ldr %0, [%1], #2\n\ 153 mov %0, %0, lsl #16\n\ 154 orr %0, %0, %0, lsr #16\n\ 155 str %0, [%2], #4\n\ 156 subs %3, %3, #2\n\ 157 bmi 2f\n\ 158 ldr %0, [%1], #2\n\ 159 mov %0, %0, lsl #16\n\ 160 orr %0, %0, %0, lsr #16\n\ 161 str %0, [%2], #4\n\ 162 subs %3, %3, #2\n\ 163 bmi 2f\n\ 164 ldr %0, [%1], #2\n\ 165 mov %0, %0, lsl #16\n\ 166 orr %0, %0, %0, lsr #16\n\ 167 str %0, [%2], #4\n\ 168 subs %3, %3, #2\n\ 169 bmi 2f\n\ 170 ldr %0, [%1], #2\n\ 171 mov %0, %0, lsl #16\n\ 172 orr %0, %0, %0, lsr #16\n\ 173 str %0, [%2], #4\n\ 174 subs %3, %3, #2\n\ 175 bpl 1b\n\ 1762: adds %3, %3, #1\n\ 177 ldreqb %0, [%1]\n\ 178 streqb %0, [%2]" 179 : "=&r" (used), "=&r" (data) 180 : "r" (addr), "r" (thislen), "1" (data)); 181 182 addr = ETHER1_RAM; 183 184 thislen = length; 185 if (thislen > 4096) 186 thislen = 4096; 187 page++; 188 } while (thislen); 189} 190 191static void 192ether1_readbuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length) 193{ 194 unsigned int page, thislen, offset; 195 void __iomem *addr; 196 197 offset = start & 4095; 198 page = start >> 12; 199 addr = ETHER1_RAM + (offset << 1); 200 201 if (offset + length > 4096) 202 thislen = 4096 - offset; 203 else 204 thislen = length; 205 206 do { 207 int used; 208 209 writeb(page, REG_PAGE); 210 length -= thislen; 211 212 __asm__ __volatile__( 213 "subs %3, %3, #2\n\ 214 bmi 2f\n\ 2151: ldr %0, [%2], #4\n\ 216 strb %0, [%1], #1\n\ 217 mov %0, %0, lsr #8\n\ 218 strb %0, [%1], #1\n\ 219 subs %3, %3, #2\n\ 220 bmi 2f\n\ 221 ldr %0, [%2], #4\n\ 222 strb %0, [%1], #1\n\ 223 mov %0, %0, lsr #8\n\ 224 strb %0, [%1], #1\n\ 225 subs %3, %3, #2\n\ 226 bmi 2f\n\ 227 ldr %0, [%2], #4\n\ 228 strb %0, [%1], #1\n\ 229 mov %0, %0, lsr #8\n\ 230 strb %0, [%1], #1\n\ 231 subs %3, %3, #2\n\ 232 bmi 2f\n\ 233 ldr %0, [%2], #4\n\ 234 strb %0, [%1], #1\n\ 235 mov %0, %0, lsr #8\n\ 236 strb %0, [%1], #1\n\ 237 subs %3, %3, #2\n\ 238 bpl 1b\n\ 2392: adds %3, %3, #1\n\ 240 ldreqb %0, [%2]\n\ 241 streqb %0, [%1]" 242 : "=&r" (used), "=&r" (data) 243 : "r" (addr), "r" (thislen), "1" (data)); 244 245 addr = ETHER1_RAM; 246 247 thislen = length; 248 if (thislen > 4096) 249 thislen = 4096; 250 page++; 251 } while (thislen); 252} 253 254static int __devinit 255ether1_ramtest(struct net_device *dev, unsigned char byte) 256{ 257 unsigned char *buffer = kmalloc (BUFFER_SIZE, GFP_KERNEL); 258 int i, ret = BUFFER_SIZE; 259 int max_errors = 15; 260 int bad = -1; 261 int bad_start = 0; 262 263 if (!buffer) 264 return 1; 265 266 memset (buffer, byte, BUFFER_SIZE); 267 ether1_writebuffer (dev, buffer, 0, BUFFER_SIZE); 268 memset (buffer, byte ^ 0xff, BUFFER_SIZE); 269 ether1_readbuffer (dev, buffer, 0, BUFFER_SIZE); 270 271 for (i = 0; i < BUFFER_SIZE; i++) { 272 if (buffer[i] != byte) { 273 if (max_errors >= 0 && bad != buffer[i]) { 274 if (bad != -1) 275 printk ("\n"); 276 printk (KERN_CRIT "%s: RAM failed with (%02X instead of %02X) at 0x%04X", 277 dev->name, buffer[i], byte, i); 278 ret = -ENODEV; 279 max_errors --; 280 bad = buffer[i]; 281 bad_start = i; 282 } 283 } else { 284 if (bad != -1) { 285 if (bad_start == i - 1) 286 printk ("\n"); 287 else 288 printk (" - 0x%04X\n", i - 1); 289 bad = -1; 290 } 291 } 292 } 293 294 if (bad != -1) 295 printk (" - 0x%04X\n", BUFFER_SIZE); 296 kfree (buffer); 297 298 return ret; 299} 300 301static int 302ether1_reset (struct net_device *dev) 303{ 304 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL); 305 return BUS_16; 306} 307 308static int __devinit 309ether1_init_2(struct net_device *dev) 310{ 311 int i; 312 dev->mem_start = 0; 313 314 i = ether1_ramtest (dev, 0x5a); 315 316 if (i > 0) 317 i = ether1_ramtest (dev, 0x1e); 318 319 if (i <= 0) 320 return -ENODEV; 321 322 dev->mem_end = i; 323 return 0; 324} 325 326/* 327 * These are the structures that are loaded into the ether RAM card to 328 * initialise the 82586 329 */ 330 331/* at 0x0100 */ 332#define NOP_ADDR (TX_AREA_START) 333#define NOP_SIZE (0x06) 334static nop_t init_nop = { 335 0, 336 CMD_NOP, 337 NOP_ADDR 338}; 339 340/* at 0x003a */ 341#define TDR_ADDR (0x003a) 342#define TDR_SIZE (0x08) 343static tdr_t init_tdr = { 344 0, 345 CMD_TDR | CMD_INTR, 346 NOP_ADDR, 347 0 348}; 349 350/* at 0x002e */ 351#define MC_ADDR (0x002e) 352#define MC_SIZE (0x0c) 353static mc_t init_mc = { 354 0, 355 CMD_SETMULTICAST, 356 TDR_ADDR, 357 0, 358 { { 0, } } 359}; 360 361/* at 0x0022 */ 362#define SA_ADDR (0x0022) 363#define SA_SIZE (0x0c) 364static sa_t init_sa = { 365 0, 366 CMD_SETADDRESS, 367 MC_ADDR, 368 { 0, } 369}; 370 371/* at 0x0010 */ 372#define CFG_ADDR (0x0010) 373#define CFG_SIZE (0x12) 374static cfg_t init_cfg = { 375 0, 376 CMD_CONFIG, 377 SA_ADDR, 378 8, 379 8, 380 CFG8_SRDY, 381 CFG9_PREAMB8 | CFG9_ADDRLENBUF | CFG9_ADDRLEN(6), 382 0, 383 0x60, 384 0, 385 CFG13_RETRY(15) | CFG13_SLOTH(2), 386 0, 387}; 388 389/* at 0x0000 */ 390#define SCB_ADDR (0x0000) 391#define SCB_SIZE (0x10) 392static scb_t init_scb = { 393 0, 394 SCB_CMDACKRNR | SCB_CMDACKCNA | SCB_CMDACKFR | SCB_CMDACKCX, 395 CFG_ADDR, 396 RX_AREA_START, 397 0, 398 0, 399 0, 400 0 401}; 402 403/* at 0xffee */ 404#define ISCP_ADDR (0xffee) 405#define ISCP_SIZE (0x08) 406static iscp_t init_iscp = { 407 1, 408 SCB_ADDR, 409 0x0000, 410 0x0000 411}; 412 413/* at 0xfff6 */ 414#define SCP_ADDR (0xfff6) 415#define SCP_SIZE (0x0a) 416static scp_t init_scp = { 417 SCP_SY_16BBUS, 418 { 0, 0 }, 419 ISCP_ADDR, 420 0 421}; 422 423#define RFD_SIZE (0x16) 424static rfd_t init_rfd = { 425 0, 426 0, 427 0, 428 0, 429 { 0, }, 430 { 0, }, 431 0 432}; 433 434#define RBD_SIZE (0x0a) 435static rbd_t init_rbd = { 436 0, 437 0, 438 0, 439 0, 440 ETH_FRAME_LEN + 8 441}; 442 443#define TX_SIZE (0x08) 444#define TBD_SIZE (0x08) 445 446static int 447ether1_init_for_open (struct net_device *dev) 448{ 449 int i, status, addr, next, next2; 450 int failures = 0; 451 unsigned long timeout; 452 453 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL); 454 455 for (i = 0; i < 6; i++) 456 init_sa.sa_addr[i] = dev->dev_addr[i]; 457 458 /* load data structures into ether1 RAM */ 459 ether1_writebuffer (dev, &init_scp, SCP_ADDR, SCP_SIZE); 460 ether1_writebuffer (dev, &init_iscp, ISCP_ADDR, ISCP_SIZE); 461 ether1_writebuffer (dev, &init_scb, SCB_ADDR, SCB_SIZE); 462 ether1_writebuffer (dev, &init_cfg, CFG_ADDR, CFG_SIZE); 463 ether1_writebuffer (dev, &init_sa, SA_ADDR, SA_SIZE); 464 ether1_writebuffer (dev, &init_mc, MC_ADDR, MC_SIZE); 465 ether1_writebuffer (dev, &init_tdr, TDR_ADDR, TDR_SIZE); 466 ether1_writebuffer (dev, &init_nop, NOP_ADDR, NOP_SIZE); 467 468 if (ether1_readw(dev, CFG_ADDR, cfg_t, cfg_command, NORMALIRQS) != CMD_CONFIG) { 469 printk (KERN_ERR "%s: detected either RAM fault or compiler bug\n", 470 dev->name); 471 return 1; 472 } 473 474 /* 475 * setup circularly linked list of { rfd, rbd, buffer }, with 476 * all rfds circularly linked, rbds circularly linked. 477 * First rfd is linked to scp, first rbd is linked to first 478 * rfd. Last rbd has a suspend command. 479 */ 480 addr = RX_AREA_START; 481 do { 482 next = addr + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10; 483 next2 = next + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10; 484 485 if (next2 >= RX_AREA_END) { 486 next = RX_AREA_START; 487 init_rfd.rfd_command = RFD_CMDEL | RFD_CMDSUSPEND; 488 priv(dev)->rx_tail = addr; 489 } else 490 init_rfd.rfd_command = 0; 491 if (addr == RX_AREA_START) 492 init_rfd.rfd_rbdoffset = addr + RFD_SIZE; 493 else 494 init_rfd.rfd_rbdoffset = 0; 495 init_rfd.rfd_link = next; 496 init_rbd.rbd_link = next + RFD_SIZE; 497 init_rbd.rbd_bufl = addr + RFD_SIZE + RBD_SIZE; 498 499 ether1_writebuffer (dev, &init_rfd, addr, RFD_SIZE); 500 ether1_writebuffer (dev, &init_rbd, addr + RFD_SIZE, RBD_SIZE); 501 addr = next; 502 } while (next2 < RX_AREA_END); 503 504 priv(dev)->tx_link = NOP_ADDR; 505 priv(dev)->tx_head = NOP_ADDR + NOP_SIZE; 506 priv(dev)->tx_tail = TDR_ADDR; 507 priv(dev)->rx_head = RX_AREA_START; 508 509 /* release reset & give 586 a prod */ 510 priv(dev)->resetting = 1; 511 priv(dev)->initialising = 1; 512 writeb(CTRL_RST, REG_CONTROL); 513 writeb(0, REG_CONTROL); 514 writeb(CTRL_CA, REG_CONTROL); 515 516 /* 586 should now unset iscp.busy */ 517 timeout = jiffies + HZ/2; 518 while (ether1_readw(dev, ISCP_ADDR, iscp_t, iscp_busy, DISABLEIRQS) == 1) { 519 if (time_after(jiffies, timeout)) { 520 printk (KERN_WARNING "%s: can't initialise 82586: iscp is busy\n", dev->name); 521 return 1; 522 } 523 } 524 525 /* check status of commands that we issued */ 526 timeout += HZ/10; 527 while (((status = ether1_readw(dev, CFG_ADDR, cfg_t, cfg_status, DISABLEIRQS)) 528 & STAT_COMPLETE) == 0) { 529 if (time_after(jiffies, timeout)) 530 break; 531 } 532 533 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { 534 printk (KERN_WARNING "%s: can't initialise 82586: config status %04X\n", dev->name, status); 535 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, 536 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), 537 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), 538 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), 539 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); 540 failures += 1; 541 } 542 543 timeout += HZ/10; 544 while (((status = ether1_readw(dev, SA_ADDR, sa_t, sa_status, DISABLEIRQS)) 545 & STAT_COMPLETE) == 0) { 546 if (time_after(jiffies, timeout)) 547 break; 548 } 549 550 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { 551 printk (KERN_WARNING "%s: can't initialise 82586: set address status %04X\n", dev->name, status); 552 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, 553 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), 554 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), 555 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), 556 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); 557 failures += 1; 558 } 559 560 timeout += HZ/10; 561 while (((status = ether1_readw(dev, MC_ADDR, mc_t, mc_status, DISABLEIRQS)) 562 & STAT_COMPLETE) == 0) { 563 if (time_after(jiffies, timeout)) 564 break; 565 } 566 567 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { 568 printk (KERN_WARNING "%s: can't initialise 82586: set multicast status %04X\n", dev->name, status); 569 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, 570 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), 571 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), 572 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), 573 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); 574 failures += 1; 575 } 576 577 timeout += HZ; 578 while (((status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_status, DISABLEIRQS)) 579 & STAT_COMPLETE) == 0) { 580 if (time_after(jiffies, timeout)) 581 break; 582 } 583 584 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { 585 printk (KERN_WARNING "%s: can't tdr (ignored)\n", dev->name); 586 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, 587 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), 588 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), 589 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), 590 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); 591 } else { 592 status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_result, DISABLEIRQS); 593 if (status & TDR_XCVRPROB) 594 printk (KERN_WARNING "%s: i/f failed tdr: transceiver problem\n", dev->name); 595 else if ((status & (TDR_SHORT|TDR_OPEN)) && (status & TDR_TIME)) { 596#ifdef FANCY 597 printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d.%d us away\n", dev->name, 598 status & TDR_SHORT ? "short" : "open", (status & TDR_TIME) / 10, 599 (status & TDR_TIME) % 10); 600#else 601 printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d clks away\n", dev->name, 602 status & TDR_SHORT ? "short" : "open", (status & TDR_TIME)); 603#endif 604 } 605 } 606 607 if (failures) 608 ether1_reset (dev); 609 return failures ? 1 : 0; 610} 611 612/* ------------------------------------------------------------------------- */ 613 614static int 615ether1_txalloc (struct net_device *dev, int size) 616{ 617 int start, tail; 618 619 size = (size + 1) & ~1; 620 tail = priv(dev)->tx_tail; 621 622 if (priv(dev)->tx_head + size > TX_AREA_END) { 623 if (tail > priv(dev)->tx_head) 624 return -1; 625 start = TX_AREA_START; 626 if (start + size > tail) 627 return -1; 628 priv(dev)->tx_head = start + size; 629 } else { 630 if (priv(dev)->tx_head < tail && (priv(dev)->tx_head + size) > tail) 631 return -1; 632 start = priv(dev)->tx_head; 633 priv(dev)->tx_head += size; 634 } 635 636 return start; 637} 638 639static int 640ether1_open (struct net_device *dev) 641{ 642 if (!is_valid_ether_addr(dev->dev_addr)) { 643 printk(KERN_WARNING "%s: invalid ethernet MAC address\n", 644 dev->name); 645 return -EINVAL; 646 } 647 648 if (request_irq(dev->irq, ether1_interrupt, 0, "ether1", dev)) 649 return -EAGAIN; 650 651 if (ether1_init_for_open (dev)) { 652 free_irq (dev->irq, dev); 653 return -EAGAIN; 654 } 655 656 netif_start_queue(dev); 657 658 return 0; 659} 660 661static void 662ether1_timeout(struct net_device *dev) 663{ 664 printk(KERN_WARNING "%s: transmit timeout, network cable problem?\n", 665 dev->name); 666 printk(KERN_WARNING "%s: resetting device\n", dev->name); 667 668 ether1_reset (dev); 669 670 if (ether1_init_for_open (dev)) 671 printk (KERN_ERR "%s: unable to restart interface\n", dev->name); 672 673 dev->stats.tx_errors++; 674 netif_wake_queue(dev); 675} 676 677static int 678ether1_sendpacket (struct sk_buff *skb, struct net_device *dev) 679{ 680 int tmp, tst, nopaddr, txaddr, tbdaddr, dataddr; 681 unsigned long flags; 682 tx_t tx; 683 tbd_t tbd; 684 nop_t nop; 685 686 if (priv(dev)->restart) { 687 printk(KERN_WARNING "%s: resetting device\n", dev->name); 688 689 ether1_reset(dev); 690 691 if (ether1_init_for_open(dev)) 692 printk(KERN_ERR "%s: unable to restart interface\n", dev->name); 693 else 694 priv(dev)->restart = 0; 695 } 696 697 if (skb->len < ETH_ZLEN) { 698 if (skb_padto(skb, ETH_ZLEN)) 699 goto out; 700 } 701 702 /* 703 * insert packet followed by a nop 704 */ 705 txaddr = ether1_txalloc (dev, TX_SIZE); 706 tbdaddr = ether1_txalloc (dev, TBD_SIZE); 707 dataddr = ether1_txalloc (dev, skb->len); 708 nopaddr = ether1_txalloc (dev, NOP_SIZE); 709 710 tx.tx_status = 0; 711 tx.tx_command = CMD_TX | CMD_INTR; 712 tx.tx_link = nopaddr; 713 tx.tx_tbdoffset = tbdaddr; 714 tbd.tbd_opts = TBD_EOL | skb->len; 715 tbd.tbd_link = I82586_NULL; 716 tbd.tbd_bufl = dataddr; 717 tbd.tbd_bufh = 0; 718 nop.nop_status = 0; 719 nop.nop_command = CMD_NOP; 720 nop.nop_link = nopaddr; 721 722 local_irq_save(flags); 723 ether1_writebuffer (dev, &tx, txaddr, TX_SIZE); 724 ether1_writebuffer (dev, &tbd, tbdaddr, TBD_SIZE); 725 ether1_writebuffer (dev, skb->data, dataddr, skb->len); 726 ether1_writebuffer (dev, &nop, nopaddr, NOP_SIZE); 727 tmp = priv(dev)->tx_link; 728 priv(dev)->tx_link = nopaddr; 729 730 /* now reset the previous nop pointer */ 731 ether1_writew(dev, txaddr, tmp, nop_t, nop_link, NORMALIRQS); 732 733 local_irq_restore(flags); 734 735 /* handle transmit */ 736 737 /* check to see if we have room for a full sized ether frame */ 738 tmp = priv(dev)->tx_head; 739 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN); 740 priv(dev)->tx_head = tmp; 741 dev_kfree_skb (skb); 742 743 if (tst == -1) 744 netif_stop_queue(dev); 745 746 out: 747 return NETDEV_TX_OK; 748} 749 750static void 751ether1_xmit_done (struct net_device *dev) 752{ 753 nop_t nop; 754 int caddr, tst; 755 756 caddr = priv(dev)->tx_tail; 757 758again: 759 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); 760 761 switch (nop.nop_command & CMD_MASK) { 762 case CMD_TDR: 763 /* special case */ 764 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS) 765 != (unsigned short)I82586_NULL) { 766 ether1_writew(dev, SCB_CMDCUCSTART | SCB_CMDRXSTART, SCB_ADDR, scb_t, 767 scb_command, NORMALIRQS); 768 writeb(CTRL_CA, REG_CONTROL); 769 } 770 priv(dev)->tx_tail = NOP_ADDR; 771 return; 772 773 case CMD_NOP: 774 if (nop.nop_link == caddr) { 775 if (priv(dev)->initialising == 0) 776 printk (KERN_WARNING "%s: strange command complete with no tx command!\n", dev->name); 777 else 778 priv(dev)->initialising = 0; 779 return; 780 } 781 if (caddr == nop.nop_link) 782 return; 783 caddr = nop.nop_link; 784 goto again; 785 786 case CMD_TX: 787 if (nop.nop_status & STAT_COMPLETE) 788 break; 789 printk (KERN_ERR "%s: strange command complete without completed command\n", dev->name); 790 priv(dev)->restart = 1; 791 return; 792 793 default: 794 printk (KERN_WARNING "%s: strange command %d complete! (offset %04X)", dev->name, 795 nop.nop_command & CMD_MASK, caddr); 796 priv(dev)->restart = 1; 797 return; 798 } 799 800 while (nop.nop_status & STAT_COMPLETE) { 801 if (nop.nop_status & STAT_OK) { 802 dev->stats.tx_packets++; 803 dev->stats.collisions += (nop.nop_status & STAT_COLLISIONS); 804 } else { 805 dev->stats.tx_errors++; 806 807 if (nop.nop_status & STAT_COLLAFTERTX) 808 dev->stats.collisions++; 809 if (nop.nop_status & STAT_NOCARRIER) 810 dev->stats.tx_carrier_errors++; 811 if (nop.nop_status & STAT_TXLOSTCTS) 812 printk (KERN_WARNING "%s: cts lost\n", dev->name); 813 if (nop.nop_status & STAT_TXSLOWDMA) 814 dev->stats.tx_fifo_errors++; 815 if (nop.nop_status & STAT_COLLEXCESSIVE) 816 dev->stats.collisions += 16; 817 } 818 819 if (nop.nop_link == caddr) { 820 printk (KERN_ERR "%s: tx buffer chaining error: tx command points to itself\n", dev->name); 821 break; 822 } 823 824 caddr = nop.nop_link; 825 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); 826 if ((nop.nop_command & CMD_MASK) != CMD_NOP) { 827 printk (KERN_ERR "%s: tx buffer chaining error: no nop after tx command\n", dev->name); 828 break; 829 } 830 831 if (caddr == nop.nop_link) 832 break; 833 834 caddr = nop.nop_link; 835 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); 836 if ((nop.nop_command & CMD_MASK) != CMD_TX) { 837 printk (KERN_ERR "%s: tx buffer chaining error: no tx command after nop\n", dev->name); 838 break; 839 } 840 } 841 priv(dev)->tx_tail = caddr; 842 843 caddr = priv(dev)->tx_head; 844 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN); 845 priv(dev)->tx_head = caddr; 846 if (tst != -1) 847 netif_wake_queue(dev); 848} 849 850static void 851ether1_recv_done (struct net_device *dev) 852{ 853 int status; 854 int nexttail, rbdaddr; 855 rbd_t rbd; 856 857 do { 858 status = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_status, NORMALIRQS); 859 if ((status & RFD_COMPLETE) == 0) 860 break; 861 862 rbdaddr = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_rbdoffset, NORMALIRQS); 863 ether1_readbuffer (dev, &rbd, rbdaddr, RBD_SIZE); 864 865 if ((rbd.rbd_status & (RBD_EOF | RBD_ACNTVALID)) == (RBD_EOF | RBD_ACNTVALID)) { 866 int length = rbd.rbd_status & RBD_ACNT; 867 struct sk_buff *skb; 868 869 length = (length + 1) & ~1; 870 skb = netdev_alloc_skb(dev, length + 2); 871 872 if (skb) { 873 skb_reserve (skb, 2); 874 875 ether1_readbuffer (dev, skb_put (skb, length), rbd.rbd_bufl, length); 876 877 skb->protocol = eth_type_trans (skb, dev); 878 netif_rx (skb); 879 dev->stats.rx_packets++; 880 } else 881 dev->stats.rx_dropped++; 882 } else { 883 printk(KERN_WARNING "%s: %s\n", dev->name, 884 (rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid"); 885 dev->stats.rx_dropped++; 886 } 887 888 nexttail = ether1_readw(dev, priv(dev)->rx_tail, rfd_t, rfd_link, NORMALIRQS); 889 /* nexttail should be rx_head */ 890 if (nexttail != priv(dev)->rx_head) 891 printk(KERN_ERR "%s: receiver buffer chaining error (%04X != %04X)\n", 892 dev->name, nexttail, priv(dev)->rx_head); 893 ether1_writew(dev, RFD_CMDEL | RFD_CMDSUSPEND, nexttail, rfd_t, rfd_command, NORMALIRQS); 894 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_command, NORMALIRQS); 895 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_status, NORMALIRQS); 896 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_rbdoffset, NORMALIRQS); 897 898 priv(dev)->rx_tail = nexttail; 899 priv(dev)->rx_head = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_link, NORMALIRQS); 900 } while (1); 901} 902 903static irqreturn_t 904ether1_interrupt (int irq, void *dev_id) 905{ 906 struct net_device *dev = (struct net_device *)dev_id; 907 int status; 908 909 status = ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS); 910 911 if (status) { 912 ether1_writew(dev, status & (SCB_STRNR | SCB_STCNA | SCB_STFR | SCB_STCX), 913 SCB_ADDR, scb_t, scb_command, NORMALIRQS); 914 writeb(CTRL_CA | CTRL_ACK, REG_CONTROL); 915 if (status & SCB_STCX) { 916 ether1_xmit_done (dev); 917 } 918 if (status & SCB_STCNA) { 919 if (priv(dev)->resetting == 0) 920 printk (KERN_WARNING "%s: CU went not ready ???\n", dev->name); 921 else 922 priv(dev)->resetting += 1; 923 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS) 924 != (unsigned short)I82586_NULL) { 925 ether1_writew(dev, SCB_CMDCUCSTART, SCB_ADDR, scb_t, scb_command, NORMALIRQS); 926 writeb(CTRL_CA, REG_CONTROL); 927 } 928 if (priv(dev)->resetting == 2) 929 priv(dev)->resetting = 0; 930 } 931 if (status & SCB_STFR) { 932 ether1_recv_done (dev); 933 } 934 if (status & SCB_STRNR) { 935 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS) & SCB_STRXSUSP) { 936 printk (KERN_WARNING "%s: RU went not ready: RU suspended\n", dev->name); 937 ether1_writew(dev, SCB_CMDRXRESUME, SCB_ADDR, scb_t, scb_command, NORMALIRQS); 938 writeb(CTRL_CA, REG_CONTROL); 939 dev->stats.rx_dropped++; /* we suspended due to lack of buffer space */ 940 } else 941 printk(KERN_WARNING "%s: RU went not ready: %04X\n", dev->name, 942 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS)); 943 printk (KERN_WARNING "RU ptr = %04X\n", ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, 944 NORMALIRQS)); 945 } 946 } else 947 writeb(CTRL_ACK, REG_CONTROL); 948 949 return IRQ_HANDLED; 950} 951 952static int 953ether1_close (struct net_device *dev) 954{ 955 ether1_reset (dev); 956 957 free_irq(dev->irq, dev); 958 959 return 0; 960} 961 962/* 963 * Set or clear the multicast filter for this adaptor. 964 * num_addrs == -1 Promiscuous mode, receive all packets. 965 * num_addrs == 0 Normal mode, clear multicast list. 966 * num_addrs > 0 Multicast mode, receive normal and MC packets, and do 967 * best-effort filtering. 968 */ 969static void 970ether1_setmulticastlist (struct net_device *dev) 971{ 972} 973 974/* ------------------------------------------------------------------------- */ 975 976static void __devinit ether1_banner(void) 977{ 978 static unsigned int version_printed = 0; 979 980 if (net_debug && version_printed++ == 0) 981 printk(KERN_INFO "%s", version); 982} 983 984static const struct net_device_ops ether1_netdev_ops = { 985 .ndo_open = ether1_open, 986 .ndo_stop = ether1_close, 987 .ndo_start_xmit = ether1_sendpacket, 988 .ndo_set_rx_mode = ether1_setmulticastlist, 989 .ndo_tx_timeout = ether1_timeout, 990 .ndo_validate_addr = eth_validate_addr, 991 .ndo_change_mtu = eth_change_mtu, 992 .ndo_set_mac_address = eth_mac_addr, 993}; 994 995static int __devinit 996ether1_probe(struct expansion_card *ec, const struct ecard_id *id) 997{ 998 struct net_device *dev; 999 int i, ret = 0; 1000 1001 ether1_banner(); 1002 1003 ret = ecard_request_resources(ec); 1004 if (ret) 1005 goto out; 1006 1007 dev = alloc_etherdev(sizeof(struct ether1_priv)); 1008 if (!dev) { 1009 ret = -ENOMEM; 1010 goto release; 1011 } 1012 1013 SET_NETDEV_DEV(dev, &ec->dev); 1014 1015 dev->irq = ec->irq; 1016 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); 1017 if (!priv(dev)->base) { 1018 ret = -ENOMEM; 1019 goto free; 1020 } 1021 1022 if ((priv(dev)->bus_type = ether1_reset(dev)) == 0) { 1023 ret = -ENODEV; 1024 goto free; 1025 } 1026 1027 for (i = 0; i < 6; i++) 1028 dev->dev_addr[i] = readb(IDPROM_ADDRESS + (i << 2)); 1029 1030 if (ether1_init_2(dev)) { 1031 ret = -ENODEV; 1032 goto free; 1033 } 1034 1035 dev->netdev_ops = ðer1_netdev_ops; 1036 dev->watchdog_timeo = 5 * HZ / 100; 1037 1038 ret = register_netdev(dev); 1039 if (ret) 1040 goto free; 1041 1042 printk(KERN_INFO "%s: ether1 in slot %d, %pM\n", 1043 dev->name, ec->slot_no, dev->dev_addr); 1044 1045 ecard_set_drvdata(ec, dev); 1046 return 0; 1047 1048 free: 1049 free_netdev(dev); 1050 release: 1051 ecard_release_resources(ec); 1052 out: 1053 return ret; 1054} 1055 1056static void __devexit ether1_remove(struct expansion_card *ec) 1057{ 1058 struct net_device *dev = ecard_get_drvdata(ec); 1059 1060 ecard_set_drvdata(ec, NULL); 1061 1062 unregister_netdev(dev); 1063 free_netdev(dev); 1064 ecard_release_resources(ec); 1065} 1066 1067static const struct ecard_id ether1_ids[] = { 1068 { MANU_ACORN, PROD_ACORN_ETHER1 }, 1069 { 0xffff, 0xffff } 1070}; 1071 1072static struct ecard_driver ether1_driver = { 1073 .probe = ether1_probe, 1074 .remove = __devexit_p(ether1_remove), 1075 .id_table = ether1_ids, 1076 .drv = { 1077 .name = "ether1", 1078 }, 1079}; 1080 1081static int __init ether1_init(void) 1082{ 1083 return ecard_register_driver(ðer1_driver); 1084} 1085 1086static void __exit ether1_exit(void) 1087{ 1088 ecard_remove_driver(ðer1_driver); 1089} 1090 1091module_init(ether1_init); 1092module_exit(ether1_exit); 1093 1094MODULE_LICENSE("GPL"); 1095