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/io.h> 52#include <asm/dma.h> 53#include <asm/ecard.h> 54 55#define __ETHER1_C 56#include "ether1.h" 57 58static unsigned int net_debug = NET_DEBUG; 59 60#define BUFFER_SIZE 0x10000 61#define TX_AREA_START 0x00100 62#define TX_AREA_END 0x05000 63#define RX_AREA_START 0x05000 64#define RX_AREA_END 0x0fc00 65 66static int ether1_open(struct net_device *dev); 67static int ether1_sendpacket(struct sk_buff *skb, struct net_device *dev); 68static irqreturn_t ether1_interrupt(int irq, void *dev_id); 69static int ether1_close(struct net_device *dev); 70static void ether1_setmulticastlist(struct net_device *dev); 71static void ether1_timeout(struct net_device *dev); 72 73/* ------------------------------------------------------------------------- */ 74 75static char version[] = "ether1 ethernet driver (c) 2000 Russell King v1.07\n"; 76 77#define BUS_16 16 78#define BUS_8 8 79 80/* ------------------------------------------------------------------------- */ 81 82#define DISABLEIRQS 1 83#define NORMALIRQS 0 84 85#define ether1_readw(dev, addr, type, offset, svflgs) ether1_inw_p (dev, addr + (int)(&((type *)0)->offset), svflgs) 86#define ether1_writew(dev, val, addr, type, offset, svflgs) ether1_outw_p (dev, val, addr + (int)(&((type *)0)->offset), svflgs) 87 88static inline unsigned short 89ether1_inw_p (struct net_device *dev, int addr, int svflgs) 90{ 91 unsigned long flags; 92 unsigned short ret; 93 94 if (svflgs) 95 local_irq_save (flags); 96 97 writeb(addr >> 12, REG_PAGE); 98 ret = readw(ETHER1_RAM + ((addr & 4095) << 1)); 99 if (svflgs) 100 local_irq_restore (flags); 101 return ret; 102} 103 104static inline void 105ether1_outw_p (struct net_device *dev, unsigned short val, int addr, int svflgs) 106{ 107 unsigned long flags; 108 109 if (svflgs) 110 local_irq_save (flags); 111 112 writeb(addr >> 12, REG_PAGE); 113 writew(val, ETHER1_RAM + ((addr & 4095) << 1)); 114 if (svflgs) 115 local_irq_restore (flags); 116} 117 118/* 119 * Some inline assembler to allow fast transfers on to/off of the card. 120 * Since this driver depends on some features presented by the ARM 121 * specific architecture, and that you can't configure this driver 122 * without specifiing ARM mode, this is not a problem. 123 * 124 * This routine is essentially an optimised memcpy from the card's 125 * onboard RAM to kernel memory. 126 */ 127static void 128ether1_writebuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length) 129{ 130 unsigned int page, thislen, offset; 131 void __iomem *addr; 132 133 offset = start & 4095; 134 page = start >> 12; 135 addr = ETHER1_RAM + (offset << 1); 136 137 if (offset + length > 4096) 138 thislen = 4096 - offset; 139 else 140 thislen = length; 141 142 do { 143 int used; 144 145 writeb(page, REG_PAGE); 146 length -= thislen; 147 148 __asm__ __volatile__( 149 "subs %3, %3, #2\n\ 150 bmi 2f\n\ 1511: ldr %0, [%1], #2\n\ 152 mov %0, %0, lsl #16\n\ 153 orr %0, %0, %0, lsr #16\n\ 154 str %0, [%2], #4\n\ 155 subs %3, %3, #2\n\ 156 bmi 2f\n\ 157 ldr %0, [%1], #2\n\ 158 mov %0, %0, lsl #16\n\ 159 orr %0, %0, %0, lsr #16\n\ 160 str %0, [%2], #4\n\ 161 subs %3, %3, #2\n\ 162 bmi 2f\n\ 163 ldr %0, [%1], #2\n\ 164 mov %0, %0, lsl #16\n\ 165 orr %0, %0, %0, lsr #16\n\ 166 str %0, [%2], #4\n\ 167 subs %3, %3, #2\n\ 168 bmi 2f\n\ 169 ldr %0, [%1], #2\n\ 170 mov %0, %0, lsl #16\n\ 171 orr %0, %0, %0, lsr #16\n\ 172 str %0, [%2], #4\n\ 173 subs %3, %3, #2\n\ 174 bpl 1b\n\ 1752: adds %3, %3, #1\n\ 176 ldreqb %0, [%1]\n\ 177 streqb %0, [%2]" 178 : "=&r" (used), "=&r" (data) 179 : "r" (addr), "r" (thislen), "1" (data)); 180 181 addr = ETHER1_RAM; 182 183 thislen = length; 184 if (thislen > 4096) 185 thislen = 4096; 186 page++; 187 } while (thislen); 188} 189 190static void 191ether1_readbuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length) 192{ 193 unsigned int page, thislen, offset; 194 void __iomem *addr; 195 196 offset = start & 4095; 197 page = start >> 12; 198 addr = ETHER1_RAM + (offset << 1); 199 200 if (offset + length > 4096) 201 thislen = 4096 - offset; 202 else 203 thislen = length; 204 205 do { 206 int used; 207 208 writeb(page, REG_PAGE); 209 length -= thislen; 210 211 __asm__ __volatile__( 212 "subs %3, %3, #2\n\ 213 bmi 2f\n\ 2141: ldr %0, [%2], #4\n\ 215 strb %0, [%1], #1\n\ 216 mov %0, %0, lsr #8\n\ 217 strb %0, [%1], #1\n\ 218 subs %3, %3, #2\n\ 219 bmi 2f\n\ 220 ldr %0, [%2], #4\n\ 221 strb %0, [%1], #1\n\ 222 mov %0, %0, lsr #8\n\ 223 strb %0, [%1], #1\n\ 224 subs %3, %3, #2\n\ 225 bmi 2f\n\ 226 ldr %0, [%2], #4\n\ 227 strb %0, [%1], #1\n\ 228 mov %0, %0, lsr #8\n\ 229 strb %0, [%1], #1\n\ 230 subs %3, %3, #2\n\ 231 bmi 2f\n\ 232 ldr %0, [%2], #4\n\ 233 strb %0, [%1], #1\n\ 234 mov %0, %0, lsr #8\n\ 235 strb %0, [%1], #1\n\ 236 subs %3, %3, #2\n\ 237 bpl 1b\n\ 2382: adds %3, %3, #1\n\ 239 ldreqb %0, [%2]\n\ 240 streqb %0, [%1]" 241 : "=&r" (used), "=&r" (data) 242 : "r" (addr), "r" (thislen), "1" (data)); 243 244 addr = ETHER1_RAM; 245 246 thislen = length; 247 if (thislen > 4096) 248 thislen = 4096; 249 page++; 250 } while (thislen); 251} 252 253static int 254ether1_ramtest(struct net_device *dev, unsigned char byte) 255{ 256 unsigned char *buffer = kmalloc (BUFFER_SIZE, GFP_KERNEL); 257 int i, ret = BUFFER_SIZE; 258 int max_errors = 15; 259 int bad = -1; 260 int bad_start = 0; 261 262 if (!buffer) 263 return 1; 264 265 memset (buffer, byte, BUFFER_SIZE); 266 ether1_writebuffer (dev, buffer, 0, BUFFER_SIZE); 267 memset (buffer, byte ^ 0xff, BUFFER_SIZE); 268 ether1_readbuffer (dev, buffer, 0, BUFFER_SIZE); 269 270 for (i = 0; i < BUFFER_SIZE; i++) { 271 if (buffer[i] != byte) { 272 if (max_errors >= 0 && bad != buffer[i]) { 273 if (bad != -1) 274 printk ("\n"); 275 printk (KERN_CRIT "%s: RAM failed with (%02X instead of %02X) at 0x%04X", 276 dev->name, buffer[i], byte, i); 277 ret = -ENODEV; 278 max_errors --; 279 bad = buffer[i]; 280 bad_start = i; 281 } 282 } else { 283 if (bad != -1) { 284 if (bad_start == i - 1) 285 printk ("\n"); 286 else 287 printk (" - 0x%04X\n", i - 1); 288 bad = -1; 289 } 290 } 291 } 292 293 if (bad != -1) 294 printk (" - 0x%04X\n", BUFFER_SIZE); 295 kfree (buffer); 296 297 return ret; 298} 299 300static int 301ether1_reset (struct net_device *dev) 302{ 303 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL); 304 return BUS_16; 305} 306 307static int 308ether1_init_2(struct net_device *dev) 309{ 310 int i; 311 dev->mem_start = 0; 312 313 i = ether1_ramtest (dev, 0x5a); 314 315 if (i > 0) 316 i = ether1_ramtest (dev, 0x1e); 317 318 if (i <= 0) 319 return -ENODEV; 320 321 dev->mem_end = i; 322 return 0; 323} 324 325/* 326 * These are the structures that are loaded into the ether RAM card to 327 * initialise the 82586 328 */ 329 330/* at 0x0100 */ 331#define NOP_ADDR (TX_AREA_START) 332#define NOP_SIZE (0x06) 333static nop_t init_nop = { 334 0, 335 CMD_NOP, 336 NOP_ADDR 337}; 338 339/* at 0x003a */ 340#define TDR_ADDR (0x003a) 341#define TDR_SIZE (0x08) 342static tdr_t init_tdr = { 343 0, 344 CMD_TDR | CMD_INTR, 345 NOP_ADDR, 346 0 347}; 348 349/* at 0x002e */ 350#define MC_ADDR (0x002e) 351#define MC_SIZE (0x0c) 352static mc_t init_mc = { 353 0, 354 CMD_SETMULTICAST, 355 TDR_ADDR, 356 0, 357 { { 0, } } 358}; 359 360/* at 0x0022 */ 361#define SA_ADDR (0x0022) 362#define SA_SIZE (0x0c) 363static sa_t init_sa = { 364 0, 365 CMD_SETADDRESS, 366 MC_ADDR, 367 { 0, } 368}; 369 370/* at 0x0010 */ 371#define CFG_ADDR (0x0010) 372#define CFG_SIZE (0x12) 373static cfg_t init_cfg = { 374 0, 375 CMD_CONFIG, 376 SA_ADDR, 377 8, 378 8, 379 CFG8_SRDY, 380 CFG9_PREAMB8 | CFG9_ADDRLENBUF | CFG9_ADDRLEN(6), 381 0, 382 0x60, 383 0, 384 CFG13_RETRY(15) | CFG13_SLOTH(2), 385 0, 386}; 387 388/* at 0x0000 */ 389#define SCB_ADDR (0x0000) 390#define SCB_SIZE (0x10) 391static scb_t init_scb = { 392 0, 393 SCB_CMDACKRNR | SCB_CMDACKCNA | SCB_CMDACKFR | SCB_CMDACKCX, 394 CFG_ADDR, 395 RX_AREA_START, 396 0, 397 0, 398 0, 399 0 400}; 401 402/* at 0xffee */ 403#define ISCP_ADDR (0xffee) 404#define ISCP_SIZE (0x08) 405static iscp_t init_iscp = { 406 1, 407 SCB_ADDR, 408 0x0000, 409 0x0000 410}; 411 412/* at 0xfff6 */ 413#define SCP_ADDR (0xfff6) 414#define SCP_SIZE (0x0a) 415static scp_t init_scp = { 416 SCP_SY_16BBUS, 417 { 0, 0 }, 418 ISCP_ADDR, 419 0 420}; 421 422#define RFD_SIZE (0x16) 423static rfd_t init_rfd = { 424 0, 425 0, 426 0, 427 0, 428 { 0, }, 429 { 0, }, 430 0 431}; 432 433#define RBD_SIZE (0x0a) 434static rbd_t init_rbd = { 435 0, 436 0, 437 0, 438 0, 439 ETH_FRAME_LEN + 8 440}; 441 442#define TX_SIZE (0x08) 443#define TBD_SIZE (0x08) 444 445static int 446ether1_init_for_open (struct net_device *dev) 447{ 448 int i, status, addr, next, next2; 449 int failures = 0; 450 unsigned long timeout; 451 452 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL); 453 454 for (i = 0; i < 6; i++) 455 init_sa.sa_addr[i] = dev->dev_addr[i]; 456 457 /* load data structures into ether1 RAM */ 458 ether1_writebuffer (dev, &init_scp, SCP_ADDR, SCP_SIZE); 459 ether1_writebuffer (dev, &init_iscp, ISCP_ADDR, ISCP_SIZE); 460 ether1_writebuffer (dev, &init_scb, SCB_ADDR, SCB_SIZE); 461 ether1_writebuffer (dev, &init_cfg, CFG_ADDR, CFG_SIZE); 462 ether1_writebuffer (dev, &init_sa, SA_ADDR, SA_SIZE); 463 ether1_writebuffer (dev, &init_mc, MC_ADDR, MC_SIZE); 464 ether1_writebuffer (dev, &init_tdr, TDR_ADDR, TDR_SIZE); 465 ether1_writebuffer (dev, &init_nop, NOP_ADDR, NOP_SIZE); 466 467 if (ether1_readw(dev, CFG_ADDR, cfg_t, cfg_command, NORMALIRQS) != CMD_CONFIG) { 468 printk (KERN_ERR "%s: detected either RAM fault or compiler bug\n", 469 dev->name); 470 return 1; 471 } 472 473 /* 474 * setup circularly linked list of { rfd, rbd, buffer }, with 475 * all rfds circularly linked, rbds circularly linked. 476 * First rfd is linked to scp, first rbd is linked to first 477 * rfd. Last rbd has a suspend command. 478 */ 479 addr = RX_AREA_START; 480 do { 481 next = addr + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10; 482 next2 = next + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10; 483 484 if (next2 >= RX_AREA_END) { 485 next = RX_AREA_START; 486 init_rfd.rfd_command = RFD_CMDEL | RFD_CMDSUSPEND; 487 priv(dev)->rx_tail = addr; 488 } else 489 init_rfd.rfd_command = 0; 490 if (addr == RX_AREA_START) 491 init_rfd.rfd_rbdoffset = addr + RFD_SIZE; 492 else 493 init_rfd.rfd_rbdoffset = 0; 494 init_rfd.rfd_link = next; 495 init_rbd.rbd_link = next + RFD_SIZE; 496 init_rbd.rbd_bufl = addr + RFD_SIZE + RBD_SIZE; 497 498 ether1_writebuffer (dev, &init_rfd, addr, RFD_SIZE); 499 ether1_writebuffer (dev, &init_rbd, addr + RFD_SIZE, RBD_SIZE); 500 addr = next; 501 } while (next2 < RX_AREA_END); 502 503 priv(dev)->tx_link = NOP_ADDR; 504 priv(dev)->tx_head = NOP_ADDR + NOP_SIZE; 505 priv(dev)->tx_tail = TDR_ADDR; 506 priv(dev)->rx_head = RX_AREA_START; 507 508 /* release reset & give 586 a prod */ 509 priv(dev)->resetting = 1; 510 priv(dev)->initialising = 1; 511 writeb(CTRL_RST, REG_CONTROL); 512 writeb(0, REG_CONTROL); 513 writeb(CTRL_CA, REG_CONTROL); 514 515 /* 586 should now unset iscp.busy */ 516 timeout = jiffies + HZ/2; 517 while (ether1_readw(dev, ISCP_ADDR, iscp_t, iscp_busy, DISABLEIRQS) == 1) { 518 if (time_after(jiffies, timeout)) { 519 printk (KERN_WARNING "%s: can't initialise 82586: iscp is busy\n", dev->name); 520 return 1; 521 } 522 } 523 524 /* check status of commands that we issued */ 525 timeout += HZ/10; 526 while (((status = ether1_readw(dev, CFG_ADDR, cfg_t, cfg_status, DISABLEIRQS)) 527 & STAT_COMPLETE) == 0) { 528 if (time_after(jiffies, timeout)) 529 break; 530 } 531 532 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { 533 printk (KERN_WARNING "%s: can't initialise 82586: config status %04X\n", dev->name, status); 534 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, 535 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), 536 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), 537 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), 538 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); 539 failures += 1; 540 } 541 542 timeout += HZ/10; 543 while (((status = ether1_readw(dev, SA_ADDR, sa_t, sa_status, DISABLEIRQS)) 544 & STAT_COMPLETE) == 0) { 545 if (time_after(jiffies, timeout)) 546 break; 547 } 548 549 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { 550 printk (KERN_WARNING "%s: can't initialise 82586: set address status %04X\n", dev->name, status); 551 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, 552 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), 553 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), 554 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), 555 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); 556 failures += 1; 557 } 558 559 timeout += HZ/10; 560 while (((status = ether1_readw(dev, MC_ADDR, mc_t, mc_status, DISABLEIRQS)) 561 & STAT_COMPLETE) == 0) { 562 if (time_after(jiffies, timeout)) 563 break; 564 } 565 566 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { 567 printk (KERN_WARNING "%s: can't initialise 82586: set multicast status %04X\n", dev->name, status); 568 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, 569 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), 570 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), 571 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), 572 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); 573 failures += 1; 574 } 575 576 timeout += HZ; 577 while (((status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_status, DISABLEIRQS)) 578 & STAT_COMPLETE) == 0) { 579 if (time_after(jiffies, timeout)) 580 break; 581 } 582 583 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { 584 printk (KERN_WARNING "%s: can't tdr (ignored)\n", dev->name); 585 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, 586 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), 587 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), 588 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), 589 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); 590 } else { 591 status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_result, DISABLEIRQS); 592 if (status & TDR_XCVRPROB) 593 printk (KERN_WARNING "%s: i/f failed tdr: transceiver problem\n", dev->name); 594 else if ((status & (TDR_SHORT|TDR_OPEN)) && (status & TDR_TIME)) { 595#ifdef FANCY 596 printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d.%d us away\n", dev->name, 597 status & TDR_SHORT ? "short" : "open", (status & TDR_TIME) / 10, 598 (status & TDR_TIME) % 10); 599#else 600 printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d clks away\n", dev->name, 601 status & TDR_SHORT ? "short" : "open", (status & TDR_TIME)); 602#endif 603 } 604 } 605 606 if (failures) 607 ether1_reset (dev); 608 return failures ? 1 : 0; 609} 610 611/* ------------------------------------------------------------------------- */ 612 613static int 614ether1_txalloc (struct net_device *dev, int size) 615{ 616 int start, tail; 617 618 size = (size + 1) & ~1; 619 tail = priv(dev)->tx_tail; 620 621 if (priv(dev)->tx_head + size > TX_AREA_END) { 622 if (tail > priv(dev)->tx_head) 623 return -1; 624 start = TX_AREA_START; 625 if (start + size > tail) 626 return -1; 627 priv(dev)->tx_head = start + size; 628 } else { 629 if (priv(dev)->tx_head < tail && (priv(dev)->tx_head + size) > tail) 630 return -1; 631 start = priv(dev)->tx_head; 632 priv(dev)->tx_head += size; 633 } 634 635 return start; 636} 637 638static int 639ether1_open (struct net_device *dev) 640{ 641 if (request_irq(dev->irq, ether1_interrupt, 0, "ether1", dev)) 642 return -EAGAIN; 643 644 if (ether1_init_for_open (dev)) { 645 free_irq (dev->irq, dev); 646 return -EAGAIN; 647 } 648 649 netif_start_queue(dev); 650 651 return 0; 652} 653 654static void 655ether1_timeout(struct net_device *dev) 656{ 657 printk(KERN_WARNING "%s: transmit timeout, network cable problem?\n", 658 dev->name); 659 printk(KERN_WARNING "%s: resetting device\n", dev->name); 660 661 ether1_reset (dev); 662 663 if (ether1_init_for_open (dev)) 664 printk (KERN_ERR "%s: unable to restart interface\n", dev->name); 665 666 dev->stats.tx_errors++; 667 netif_wake_queue(dev); 668} 669 670static int 671ether1_sendpacket (struct sk_buff *skb, struct net_device *dev) 672{ 673 int tmp, tst, nopaddr, txaddr, tbdaddr, dataddr; 674 unsigned long flags; 675 tx_t tx; 676 tbd_t tbd; 677 nop_t nop; 678 679 if (priv(dev)->restart) { 680 printk(KERN_WARNING "%s: resetting device\n", dev->name); 681 682 ether1_reset(dev); 683 684 if (ether1_init_for_open(dev)) 685 printk(KERN_ERR "%s: unable to restart interface\n", dev->name); 686 else 687 priv(dev)->restart = 0; 688 } 689 690 if (skb->len < ETH_ZLEN) { 691 if (skb_padto(skb, ETH_ZLEN)) 692 goto out; 693 } 694 695 /* 696 * insert packet followed by a nop 697 */ 698 txaddr = ether1_txalloc (dev, TX_SIZE); 699 tbdaddr = ether1_txalloc (dev, TBD_SIZE); 700 dataddr = ether1_txalloc (dev, skb->len); 701 nopaddr = ether1_txalloc (dev, NOP_SIZE); 702 703 tx.tx_status = 0; 704 tx.tx_command = CMD_TX | CMD_INTR; 705 tx.tx_link = nopaddr; 706 tx.tx_tbdoffset = tbdaddr; 707 tbd.tbd_opts = TBD_EOL | skb->len; 708 tbd.tbd_link = I82586_NULL; 709 tbd.tbd_bufl = dataddr; 710 tbd.tbd_bufh = 0; 711 nop.nop_status = 0; 712 nop.nop_command = CMD_NOP; 713 nop.nop_link = nopaddr; 714 715 local_irq_save(flags); 716 ether1_writebuffer (dev, &tx, txaddr, TX_SIZE); 717 ether1_writebuffer (dev, &tbd, tbdaddr, TBD_SIZE); 718 ether1_writebuffer (dev, skb->data, dataddr, skb->len); 719 ether1_writebuffer (dev, &nop, nopaddr, NOP_SIZE); 720 tmp = priv(dev)->tx_link; 721 priv(dev)->tx_link = nopaddr; 722 723 /* now reset the previous nop pointer */ 724 ether1_writew(dev, txaddr, tmp, nop_t, nop_link, NORMALIRQS); 725 726 local_irq_restore(flags); 727 728 /* handle transmit */ 729 730 /* check to see if we have room for a full sized ether frame */ 731 tmp = priv(dev)->tx_head; 732 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN); 733 priv(dev)->tx_head = tmp; 734 dev_kfree_skb (skb); 735 736 if (tst == -1) 737 netif_stop_queue(dev); 738 739 out: 740 return NETDEV_TX_OK; 741} 742 743static void 744ether1_xmit_done (struct net_device *dev) 745{ 746 nop_t nop; 747 int caddr, tst; 748 749 caddr = priv(dev)->tx_tail; 750 751again: 752 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); 753 754 switch (nop.nop_command & CMD_MASK) { 755 case CMD_TDR: 756 /* special case */ 757 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS) 758 != (unsigned short)I82586_NULL) { 759 ether1_writew(dev, SCB_CMDCUCSTART | SCB_CMDRXSTART, SCB_ADDR, scb_t, 760 scb_command, NORMALIRQS); 761 writeb(CTRL_CA, REG_CONTROL); 762 } 763 priv(dev)->tx_tail = NOP_ADDR; 764 return; 765 766 case CMD_NOP: 767 if (nop.nop_link == caddr) { 768 if (priv(dev)->initialising == 0) 769 printk (KERN_WARNING "%s: strange command complete with no tx command!\n", dev->name); 770 else 771 priv(dev)->initialising = 0; 772 return; 773 } 774 if (caddr == nop.nop_link) 775 return; 776 caddr = nop.nop_link; 777 goto again; 778 779 case CMD_TX: 780 if (nop.nop_status & STAT_COMPLETE) 781 break; 782 printk (KERN_ERR "%s: strange command complete without completed command\n", dev->name); 783 priv(dev)->restart = 1; 784 return; 785 786 default: 787 printk (KERN_WARNING "%s: strange command %d complete! (offset %04X)", dev->name, 788 nop.nop_command & CMD_MASK, caddr); 789 priv(dev)->restart = 1; 790 return; 791 } 792 793 while (nop.nop_status & STAT_COMPLETE) { 794 if (nop.nop_status & STAT_OK) { 795 dev->stats.tx_packets++; 796 dev->stats.collisions += (nop.nop_status & STAT_COLLISIONS); 797 } else { 798 dev->stats.tx_errors++; 799 800 if (nop.nop_status & STAT_COLLAFTERTX) 801 dev->stats.collisions++; 802 if (nop.nop_status & STAT_NOCARRIER) 803 dev->stats.tx_carrier_errors++; 804 if (nop.nop_status & STAT_TXLOSTCTS) 805 printk (KERN_WARNING "%s: cts lost\n", dev->name); 806 if (nop.nop_status & STAT_TXSLOWDMA) 807 dev->stats.tx_fifo_errors++; 808 if (nop.nop_status & STAT_COLLEXCESSIVE) 809 dev->stats.collisions += 16; 810 } 811 812 if (nop.nop_link == caddr) { 813 printk (KERN_ERR "%s: tx buffer chaining error: tx command points to itself\n", dev->name); 814 break; 815 } 816 817 caddr = nop.nop_link; 818 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); 819 if ((nop.nop_command & CMD_MASK) != CMD_NOP) { 820 printk (KERN_ERR "%s: tx buffer chaining error: no nop after tx command\n", dev->name); 821 break; 822 } 823 824 if (caddr == nop.nop_link) 825 break; 826 827 caddr = nop.nop_link; 828 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); 829 if ((nop.nop_command & CMD_MASK) != CMD_TX) { 830 printk (KERN_ERR "%s: tx buffer chaining error: no tx command after nop\n", dev->name); 831 break; 832 } 833 } 834 priv(dev)->tx_tail = caddr; 835 836 caddr = priv(dev)->tx_head; 837 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN); 838 priv(dev)->tx_head = caddr; 839 if (tst != -1) 840 netif_wake_queue(dev); 841} 842 843static void 844ether1_recv_done (struct net_device *dev) 845{ 846 int status; 847 int nexttail, rbdaddr; 848 rbd_t rbd; 849 850 do { 851 status = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_status, NORMALIRQS); 852 if ((status & RFD_COMPLETE) == 0) 853 break; 854 855 rbdaddr = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_rbdoffset, NORMALIRQS); 856 ether1_readbuffer (dev, &rbd, rbdaddr, RBD_SIZE); 857 858 if ((rbd.rbd_status & (RBD_EOF | RBD_ACNTVALID)) == (RBD_EOF | RBD_ACNTVALID)) { 859 int length = rbd.rbd_status & RBD_ACNT; 860 struct sk_buff *skb; 861 862 length = (length + 1) & ~1; 863 skb = netdev_alloc_skb(dev, length + 2); 864 865 if (skb) { 866 skb_reserve (skb, 2); 867 868 ether1_readbuffer (dev, skb_put (skb, length), rbd.rbd_bufl, length); 869 870 skb->protocol = eth_type_trans (skb, dev); 871 netif_rx (skb); 872 dev->stats.rx_packets++; 873 } else 874 dev->stats.rx_dropped++; 875 } else { 876 printk(KERN_WARNING "%s: %s\n", dev->name, 877 (rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid"); 878 dev->stats.rx_dropped++; 879 } 880 881 nexttail = ether1_readw(dev, priv(dev)->rx_tail, rfd_t, rfd_link, NORMALIRQS); 882 /* nexttail should be rx_head */ 883 if (nexttail != priv(dev)->rx_head) 884 printk(KERN_ERR "%s: receiver buffer chaining error (%04X != %04X)\n", 885 dev->name, nexttail, priv(dev)->rx_head); 886 ether1_writew(dev, RFD_CMDEL | RFD_CMDSUSPEND, nexttail, rfd_t, rfd_command, NORMALIRQS); 887 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_command, NORMALIRQS); 888 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_status, NORMALIRQS); 889 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_rbdoffset, NORMALIRQS); 890 891 priv(dev)->rx_tail = nexttail; 892 priv(dev)->rx_head = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_link, NORMALIRQS); 893 } while (1); 894} 895 896static irqreturn_t 897ether1_interrupt (int irq, void *dev_id) 898{ 899 struct net_device *dev = (struct net_device *)dev_id; 900 int status; 901 902 status = ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS); 903 904 if (status) { 905 ether1_writew(dev, status & (SCB_STRNR | SCB_STCNA | SCB_STFR | SCB_STCX), 906 SCB_ADDR, scb_t, scb_command, NORMALIRQS); 907 writeb(CTRL_CA | CTRL_ACK, REG_CONTROL); 908 if (status & SCB_STCX) { 909 ether1_xmit_done (dev); 910 } 911 if (status & SCB_STCNA) { 912 if (priv(dev)->resetting == 0) 913 printk (KERN_WARNING "%s: CU went not ready ???\n", dev->name); 914 else 915 priv(dev)->resetting += 1; 916 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS) 917 != (unsigned short)I82586_NULL) { 918 ether1_writew(dev, SCB_CMDCUCSTART, SCB_ADDR, scb_t, scb_command, NORMALIRQS); 919 writeb(CTRL_CA, REG_CONTROL); 920 } 921 if (priv(dev)->resetting == 2) 922 priv(dev)->resetting = 0; 923 } 924 if (status & SCB_STFR) { 925 ether1_recv_done (dev); 926 } 927 if (status & SCB_STRNR) { 928 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS) & SCB_STRXSUSP) { 929 printk (KERN_WARNING "%s: RU went not ready: RU suspended\n", dev->name); 930 ether1_writew(dev, SCB_CMDRXRESUME, SCB_ADDR, scb_t, scb_command, NORMALIRQS); 931 writeb(CTRL_CA, REG_CONTROL); 932 dev->stats.rx_dropped++; /* we suspended due to lack of buffer space */ 933 } else 934 printk(KERN_WARNING "%s: RU went not ready: %04X\n", dev->name, 935 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS)); 936 printk (KERN_WARNING "RU ptr = %04X\n", ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, 937 NORMALIRQS)); 938 } 939 } else 940 writeb(CTRL_ACK, REG_CONTROL); 941 942 return IRQ_HANDLED; 943} 944 945static int 946ether1_close (struct net_device *dev) 947{ 948 ether1_reset (dev); 949 950 free_irq(dev->irq, dev); 951 952 return 0; 953} 954 955/* 956 * Set or clear the multicast filter for this adaptor. 957 * num_addrs == -1 Promiscuous mode, receive all packets. 958 * num_addrs == 0 Normal mode, clear multicast list. 959 * num_addrs > 0 Multicast mode, receive normal and MC packets, and do 960 * best-effort filtering. 961 */ 962static void 963ether1_setmulticastlist (struct net_device *dev) 964{ 965} 966 967/* ------------------------------------------------------------------------- */ 968 969static void ether1_banner(void) 970{ 971 static unsigned int version_printed = 0; 972 973 if (net_debug && version_printed++ == 0) 974 printk(KERN_INFO "%s", version); 975} 976 977static const struct net_device_ops ether1_netdev_ops = { 978 .ndo_open = ether1_open, 979 .ndo_stop = ether1_close, 980 .ndo_start_xmit = ether1_sendpacket, 981 .ndo_set_rx_mode = ether1_setmulticastlist, 982 .ndo_tx_timeout = ether1_timeout, 983 .ndo_validate_addr = eth_validate_addr, 984 .ndo_change_mtu = eth_change_mtu, 985 .ndo_set_mac_address = eth_mac_addr, 986}; 987 988static int 989ether1_probe(struct expansion_card *ec, const struct ecard_id *id) 990{ 991 struct net_device *dev; 992 int i, ret = 0; 993 994 ether1_banner(); 995 996 ret = ecard_request_resources(ec); 997 if (ret) 998 goto out; 999 1000 dev = alloc_etherdev(sizeof(struct ether1_priv)); 1001 if (!dev) { 1002 ret = -ENOMEM; 1003 goto release; 1004 } 1005 1006 SET_NETDEV_DEV(dev, &ec->dev); 1007 1008 dev->irq = ec->irq; 1009 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); 1010 if (!priv(dev)->base) { 1011 ret = -ENOMEM; 1012 goto free; 1013 } 1014 1015 if ((priv(dev)->bus_type = ether1_reset(dev)) == 0) { 1016 ret = -ENODEV; 1017 goto free; 1018 } 1019 1020 for (i = 0; i < 6; i++) 1021 dev->dev_addr[i] = readb(IDPROM_ADDRESS + (i << 2)); 1022 1023 if (ether1_init_2(dev)) { 1024 ret = -ENODEV; 1025 goto free; 1026 } 1027 1028 dev->netdev_ops = ðer1_netdev_ops; 1029 dev->watchdog_timeo = 5 * HZ / 100; 1030 1031 ret = register_netdev(dev); 1032 if (ret) 1033 goto free; 1034 1035 printk(KERN_INFO "%s: ether1 in slot %d, %pM\n", 1036 dev->name, ec->slot_no, dev->dev_addr); 1037 1038 ecard_set_drvdata(ec, dev); 1039 return 0; 1040 1041 free: 1042 free_netdev(dev); 1043 release: 1044 ecard_release_resources(ec); 1045 out: 1046 return ret; 1047} 1048 1049static void ether1_remove(struct expansion_card *ec) 1050{ 1051 struct net_device *dev = ecard_get_drvdata(ec); 1052 1053 ecard_set_drvdata(ec, NULL); 1054 1055 unregister_netdev(dev); 1056 free_netdev(dev); 1057 ecard_release_resources(ec); 1058} 1059 1060static const struct ecard_id ether1_ids[] = { 1061 { MANU_ACORN, PROD_ACORN_ETHER1 }, 1062 { 0xffff, 0xffff } 1063}; 1064 1065static struct ecard_driver ether1_driver = { 1066 .probe = ether1_probe, 1067 .remove = ether1_remove, 1068 .id_table = ether1_ids, 1069 .drv = { 1070 .name = "ether1", 1071 }, 1072}; 1073 1074static int __init ether1_init(void) 1075{ 1076 return ecard_register_driver(ðer1_driver); 1077} 1078 1079static void __exit ether1_exit(void) 1080{ 1081 ecard_remove_driver(ðer1_driver); 1082} 1083 1084module_init(ether1_init); 1085module_exit(ether1_exit); 1086 1087MODULE_LICENSE("GPL"); 1088