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 58 static 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 66 static int ether1_open(struct net_device *dev); 67 static int ether1_sendpacket(struct sk_buff *skb, struct net_device *dev); 68 static irqreturn_t ether1_interrupt(int irq, void *dev_id); 69 static int ether1_close(struct net_device *dev); 70 static void ether1_setmulticastlist(struct net_device *dev); 71 static void ether1_timeout(struct net_device *dev); 72 73 /* ------------------------------------------------------------------------- */ 74 75 static char version[] __devinitdata = "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 88 static inline unsigned short 89 ether1_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 } 103 104 static inline void 105 ether1_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 */ 127 static void 128 ether1_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\ 151 1: 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\ 175 2: 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 } 189 190 static void 191 ether1_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\ 214 1: 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\ 238 2: 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 } 252 253 static int __devinit 254 ether1_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 } 299 300 static int 301 ether1_reset (struct net_device *dev) 302 { 303 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL); 304 return BUS_16; 305 } 306 307 static int __devinit 308 ether1_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) 333 static 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) 342 static 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) 352 static 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) 363 static 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) 373 static 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) 391 static 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) 405 static 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) 415 static scp_t init_scp = { 416 SCP_SY_16BBUS, 417 { 0, 0 }, 418 ISCP_ADDR, 419 0 420 }; 421 422 #define RFD_SIZE (0x16) 423 static 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) 434 static 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) 444 445 static int 446 ether1_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 /* ------------------------------------------------------------------------- */ 612 613 static int 614 ether1_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 } 637 638 static int 639 ether1_open (struct net_device *dev) 640 { 641 if (!is_valid_ether_addr(dev->dev_addr)) { 642 printk(KERN_WARNING "%s: invalid ethernet MAC address\n", 643 dev->name); 644 return -EINVAL; 645 } 646 647 if (request_irq(dev->irq, ether1_interrupt, 0, "ether1", dev)) 648 return -EAGAIN; 649 650 if (ether1_init_for_open (dev)) { 651 free_irq (dev->irq, dev); 652 return -EAGAIN; 653 } 654 655 netif_start_queue(dev); 656 657 return 0; 658 } 659 660 static void 661 ether1_timeout(struct net_device *dev) 662 { 663 printk(KERN_WARNING "%s: transmit timeout, network cable problem?\n", 664 dev->name); 665 printk(KERN_WARNING "%s: resetting device\n", dev->name); 666 667 ether1_reset (dev); 668 669 if (ether1_init_for_open (dev)) 670 printk (KERN_ERR "%s: unable to restart interface\n", dev->name); 671 672 dev->stats.tx_errors++; 673 netif_wake_queue(dev); 674 } 675 676 static int 677 ether1_sendpacket (struct sk_buff *skb, struct net_device *dev) 678 { 679 int tmp, tst, nopaddr, txaddr, tbdaddr, dataddr; 680 unsigned long flags; 681 tx_t tx; 682 tbd_t tbd; 683 nop_t nop; 684 685 if (priv(dev)->restart) { 686 printk(KERN_WARNING "%s: resetting device\n", dev->name); 687 688 ether1_reset(dev); 689 690 if (ether1_init_for_open(dev)) 691 printk(KERN_ERR "%s: unable to restart interface\n", dev->name); 692 else 693 priv(dev)->restart = 0; 694 } 695 696 if (skb->len < ETH_ZLEN) { 697 if (skb_padto(skb, ETH_ZLEN)) 698 goto out; 699 } 700 701 /* 702 * insert packet followed by a nop 703 */ 704 txaddr = ether1_txalloc (dev, TX_SIZE); 705 tbdaddr = ether1_txalloc (dev, TBD_SIZE); 706 dataddr = ether1_txalloc (dev, skb->len); 707 nopaddr = ether1_txalloc (dev, NOP_SIZE); 708 709 tx.tx_status = 0; 710 tx.tx_command = CMD_TX | CMD_INTR; 711 tx.tx_link = nopaddr; 712 tx.tx_tbdoffset = tbdaddr; 713 tbd.tbd_opts = TBD_EOL | skb->len; 714 tbd.tbd_link = I82586_NULL; 715 tbd.tbd_bufl = dataddr; 716 tbd.tbd_bufh = 0; 717 nop.nop_status = 0; 718 nop.nop_command = CMD_NOP; 719 nop.nop_link = nopaddr; 720 721 local_irq_save(flags); 722 ether1_writebuffer (dev, &tx, txaddr, TX_SIZE); 723 ether1_writebuffer (dev, &tbd, tbdaddr, TBD_SIZE); 724 ether1_writebuffer (dev, skb->data, dataddr, skb->len); 725 ether1_writebuffer (dev, &nop, nopaddr, NOP_SIZE); 726 tmp = priv(dev)->tx_link; 727 priv(dev)->tx_link = nopaddr; 728 729 /* now reset the previous nop pointer */ 730 ether1_writew(dev, txaddr, tmp, nop_t, nop_link, NORMALIRQS); 731 732 local_irq_restore(flags); 733 734 /* handle transmit */ 735 736 /* check to see if we have room for a full sized ether frame */ 737 tmp = priv(dev)->tx_head; 738 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN); 739 priv(dev)->tx_head = tmp; 740 dev_kfree_skb (skb); 741 742 if (tst == -1) 743 netif_stop_queue(dev); 744 745 out: 746 return NETDEV_TX_OK; 747 } 748 749 static void 750 ether1_xmit_done (struct net_device *dev) 751 { 752 nop_t nop; 753 int caddr, tst; 754 755 caddr = priv(dev)->tx_tail; 756 757 again: 758 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); 759 760 switch (nop.nop_command & CMD_MASK) { 761 case CMD_TDR: 762 /* special case */ 763 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS) 764 != (unsigned short)I82586_NULL) { 765 ether1_writew(dev, SCB_CMDCUCSTART | SCB_CMDRXSTART, SCB_ADDR, scb_t, 766 scb_command, NORMALIRQS); 767 writeb(CTRL_CA, REG_CONTROL); 768 } 769 priv(dev)->tx_tail = NOP_ADDR; 770 return; 771 772 case CMD_NOP: 773 if (nop.nop_link == caddr) { 774 if (priv(dev)->initialising == 0) 775 printk (KERN_WARNING "%s: strange command complete with no tx command!\n", dev->name); 776 else 777 priv(dev)->initialising = 0; 778 return; 779 } 780 if (caddr == nop.nop_link) 781 return; 782 caddr = nop.nop_link; 783 goto again; 784 785 case CMD_TX: 786 if (nop.nop_status & STAT_COMPLETE) 787 break; 788 printk (KERN_ERR "%s: strange command complete without completed command\n", dev->name); 789 priv(dev)->restart = 1; 790 return; 791 792 default: 793 printk (KERN_WARNING "%s: strange command %d complete! (offset %04X)", dev->name, 794 nop.nop_command & CMD_MASK, caddr); 795 priv(dev)->restart = 1; 796 return; 797 } 798 799 while (nop.nop_status & STAT_COMPLETE) { 800 if (nop.nop_status & STAT_OK) { 801 dev->stats.tx_packets++; 802 dev->stats.collisions += (nop.nop_status & STAT_COLLISIONS); 803 } else { 804 dev->stats.tx_errors++; 805 806 if (nop.nop_status & STAT_COLLAFTERTX) 807 dev->stats.collisions++; 808 if (nop.nop_status & STAT_NOCARRIER) 809 dev->stats.tx_carrier_errors++; 810 if (nop.nop_status & STAT_TXLOSTCTS) 811 printk (KERN_WARNING "%s: cts lost\n", dev->name); 812 if (nop.nop_status & STAT_TXSLOWDMA) 813 dev->stats.tx_fifo_errors++; 814 if (nop.nop_status & STAT_COLLEXCESSIVE) 815 dev->stats.collisions += 16; 816 } 817 818 if (nop.nop_link == caddr) { 819 printk (KERN_ERR "%s: tx buffer chaining error: tx command points to itself\n", dev->name); 820 break; 821 } 822 823 caddr = nop.nop_link; 824 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); 825 if ((nop.nop_command & CMD_MASK) != CMD_NOP) { 826 printk (KERN_ERR "%s: tx buffer chaining error: no nop after tx command\n", dev->name); 827 break; 828 } 829 830 if (caddr == nop.nop_link) 831 break; 832 833 caddr = nop.nop_link; 834 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); 835 if ((nop.nop_command & CMD_MASK) != CMD_TX) { 836 printk (KERN_ERR "%s: tx buffer chaining error: no tx command after nop\n", dev->name); 837 break; 838 } 839 } 840 priv(dev)->tx_tail = caddr; 841 842 caddr = priv(dev)->tx_head; 843 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN); 844 priv(dev)->tx_head = caddr; 845 if (tst != -1) 846 netif_wake_queue(dev); 847 } 848 849 static void 850 ether1_recv_done (struct net_device *dev) 851 { 852 int status; 853 int nexttail, rbdaddr; 854 rbd_t rbd; 855 856 do { 857 status = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_status, NORMALIRQS); 858 if ((status & RFD_COMPLETE) == 0) 859 break; 860 861 rbdaddr = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_rbdoffset, NORMALIRQS); 862 ether1_readbuffer (dev, &rbd, rbdaddr, RBD_SIZE); 863 864 if ((rbd.rbd_status & (RBD_EOF | RBD_ACNTVALID)) == (RBD_EOF | RBD_ACNTVALID)) { 865 int length = rbd.rbd_status & RBD_ACNT; 866 struct sk_buff *skb; 867 868 length = (length + 1) & ~1; 869 skb = netdev_alloc_skb(dev, length + 2); 870 871 if (skb) { 872 skb_reserve (skb, 2); 873 874 ether1_readbuffer (dev, skb_put (skb, length), rbd.rbd_bufl, length); 875 876 skb->protocol = eth_type_trans (skb, dev); 877 netif_rx (skb); 878 dev->stats.rx_packets++; 879 } else 880 dev->stats.rx_dropped++; 881 } else { 882 printk(KERN_WARNING "%s: %s\n", dev->name, 883 (rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid"); 884 dev->stats.rx_dropped++; 885 } 886 887 nexttail = ether1_readw(dev, priv(dev)->rx_tail, rfd_t, rfd_link, NORMALIRQS); 888 /* nexttail should be rx_head */ 889 if (nexttail != priv(dev)->rx_head) 890 printk(KERN_ERR "%s: receiver buffer chaining error (%04X != %04X)\n", 891 dev->name, nexttail, priv(dev)->rx_head); 892 ether1_writew(dev, RFD_CMDEL | RFD_CMDSUSPEND, nexttail, rfd_t, rfd_command, NORMALIRQS); 893 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_command, NORMALIRQS); 894 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_status, NORMALIRQS); 895 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_rbdoffset, NORMALIRQS); 896 897 priv(dev)->rx_tail = nexttail; 898 priv(dev)->rx_head = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_link, NORMALIRQS); 899 } while (1); 900 } 901 902 static irqreturn_t 903 ether1_interrupt (int irq, void *dev_id) 904 { 905 struct net_device *dev = (struct net_device *)dev_id; 906 int status; 907 908 status = ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS); 909 910 if (status) { 911 ether1_writew(dev, status & (SCB_STRNR | SCB_STCNA | SCB_STFR | SCB_STCX), 912 SCB_ADDR, scb_t, scb_command, NORMALIRQS); 913 writeb(CTRL_CA | CTRL_ACK, REG_CONTROL); 914 if (status & SCB_STCX) { 915 ether1_xmit_done (dev); 916 } 917 if (status & SCB_STCNA) { 918 if (priv(dev)->resetting == 0) 919 printk (KERN_WARNING "%s: CU went not ready ???\n", dev->name); 920 else 921 priv(dev)->resetting += 1; 922 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS) 923 != (unsigned short)I82586_NULL) { 924 ether1_writew(dev, SCB_CMDCUCSTART, SCB_ADDR, scb_t, scb_command, NORMALIRQS); 925 writeb(CTRL_CA, REG_CONTROL); 926 } 927 if (priv(dev)->resetting == 2) 928 priv(dev)->resetting = 0; 929 } 930 if (status & SCB_STFR) { 931 ether1_recv_done (dev); 932 } 933 if (status & SCB_STRNR) { 934 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS) & SCB_STRXSUSP) { 935 printk (KERN_WARNING "%s: RU went not ready: RU suspended\n", dev->name); 936 ether1_writew(dev, SCB_CMDRXRESUME, SCB_ADDR, scb_t, scb_command, NORMALIRQS); 937 writeb(CTRL_CA, REG_CONTROL); 938 dev->stats.rx_dropped++; /* we suspended due to lack of buffer space */ 939 } else 940 printk(KERN_WARNING "%s: RU went not ready: %04X\n", dev->name, 941 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS)); 942 printk (KERN_WARNING "RU ptr = %04X\n", ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, 943 NORMALIRQS)); 944 } 945 } else 946 writeb(CTRL_ACK, REG_CONTROL); 947 948 return IRQ_HANDLED; 949 } 950 951 static int 952 ether1_close (struct net_device *dev) 953 { 954 ether1_reset (dev); 955 956 free_irq(dev->irq, dev); 957 958 return 0; 959 } 960 961 /* 962 * Set or clear the multicast filter for this adaptor. 963 * num_addrs == -1 Promiscuous mode, receive all packets. 964 * num_addrs == 0 Normal mode, clear multicast list. 965 * num_addrs > 0 Multicast mode, receive normal and MC packets, and do 966 * best-effort filtering. 967 */ 968 static void 969 ether1_setmulticastlist (struct net_device *dev) 970 { 971 } 972 973 /* ------------------------------------------------------------------------- */ 974 975 static void __devinit ether1_banner(void) 976 { 977 static unsigned int version_printed = 0; 978 979 if (net_debug && version_printed++ == 0) 980 printk(KERN_INFO "%s", version); 981 } 982 983 static const struct net_device_ops ether1_netdev_ops = { 984 .ndo_open = ether1_open, 985 .ndo_stop = ether1_close, 986 .ndo_start_xmit = ether1_sendpacket, 987 .ndo_set_rx_mode = ether1_setmulticastlist, 988 .ndo_tx_timeout = ether1_timeout, 989 .ndo_validate_addr = eth_validate_addr, 990 .ndo_change_mtu = eth_change_mtu, 991 .ndo_set_mac_address = eth_mac_addr, 992 }; 993 994 static int __devinit 995 ether1_probe(struct expansion_card *ec, const struct ecard_id *id) 996 { 997 struct net_device *dev; 998 int i, ret = 0; 999 1000 ether1_banner(); 1001 1002 ret = ecard_request_resources(ec); 1003 if (ret) 1004 goto out; 1005 1006 dev = alloc_etherdev(sizeof(struct ether1_priv)); 1007 if (!dev) { 1008 ret = -ENOMEM; 1009 goto release; 1010 } 1011 1012 SET_NETDEV_DEV(dev, &ec->dev); 1013 1014 dev->irq = ec->irq; 1015 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); 1016 if (!priv(dev)->base) { 1017 ret = -ENOMEM; 1018 goto free; 1019 } 1020 1021 if ((priv(dev)->bus_type = ether1_reset(dev)) == 0) { 1022 ret = -ENODEV; 1023 goto free; 1024 } 1025 1026 for (i = 0; i < 6; i++) 1027 dev->dev_addr[i] = readb(IDPROM_ADDRESS + (i << 2)); 1028 1029 if (ether1_init_2(dev)) { 1030 ret = -ENODEV; 1031 goto free; 1032 } 1033 1034 dev->netdev_ops = ðer1_netdev_ops; 1035 dev->watchdog_timeo = 5 * HZ / 100; 1036 1037 ret = register_netdev(dev); 1038 if (ret) 1039 goto free; 1040 1041 printk(KERN_INFO "%s: ether1 in slot %d, %pM\n", 1042 dev->name, ec->slot_no, dev->dev_addr); 1043 1044 ecard_set_drvdata(ec, dev); 1045 return 0; 1046 1047 free: 1048 free_netdev(dev); 1049 release: 1050 ecard_release_resources(ec); 1051 out: 1052 return ret; 1053 } 1054 1055 static void __devexit ether1_remove(struct expansion_card *ec) 1056 { 1057 struct net_device *dev = ecard_get_drvdata(ec); 1058 1059 ecard_set_drvdata(ec, NULL); 1060 1061 unregister_netdev(dev); 1062 free_netdev(dev); 1063 ecard_release_resources(ec); 1064 } 1065 1066 static const struct ecard_id ether1_ids[] = { 1067 { MANU_ACORN, PROD_ACORN_ETHER1 }, 1068 { 0xffff, 0xffff } 1069 }; 1070 1071 static struct ecard_driver ether1_driver = { 1072 .probe = ether1_probe, 1073 .remove = __devexit_p(ether1_remove), 1074 .id_table = ether1_ids, 1075 .drv = { 1076 .name = "ether1", 1077 }, 1078 }; 1079 1080 static int __init ether1_init(void) 1081 { 1082 return ecard_register_driver(ðer1_driver); 1083 } 1084 1085 static void __exit ether1_exit(void) 1086 { 1087 ecard_remove_driver(ðer1_driver); 1088 } 1089 1090 module_init(ether1_init); 1091 module_exit(ether1_exit); 1092 1093 MODULE_LICENSE("GPL"); 1094