1 /* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]0 2 * driver for linux. 3 * Written 1996 by Russell Nelson, with reference to skeleton.c 4 * written 1993-1994 by Donald Becker. 5 * 6 * This software may be used and distributed according to the terms 7 * of the GNU General Public License, incorporated herein by reference. 8 * 9 * The author may be reached at nelson@crynwr.com, Crynwr 10 * Software, 521 Pleasant Valley Rd., Potsdam, NY 13676 11 * 12 * Other contributors: 13 * Mike Cruse : mcruse@cti-ltd.com 14 * Russ Nelson 15 * Melody Lee : ethernet@crystal.cirrus.com 16 * Alan Cox 17 * Andrew Morton 18 * Oskar Schirmer : oskar@scara.com 19 * Deepak Saxena : dsaxena@plexity.net 20 * Dmitry Pervushin : dpervushin@ru.mvista.com 21 * Deepak Saxena : dsaxena@plexity.net 22 * Domenico Andreoli : cavokz@gmail.com 23 */ 24 25 26 /* 27 * Set this to zero to disable DMA code 28 * 29 * Note that even if DMA is turned off we still support the 'dma' and 'use_dma' 30 * module options so we don't break any startup scripts. 31 */ 32 #ifndef CONFIG_ISA_DMA_API 33 #define ALLOW_DMA 0 34 #else 35 #define ALLOW_DMA 1 36 #endif 37 38 /* 39 * Set this to zero to remove all the debug statements via 40 * dead code elimination 41 */ 42 #define DEBUGGING 1 43 44 /* Sources: 45 * Crynwr packet driver epktisa. 46 * Crystal Semiconductor data sheets. 47 */ 48 49 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 50 51 #include <linux/module.h> 52 #include <linux/printk.h> 53 #include <linux/errno.h> 54 #include <linux/netdevice.h> 55 #include <linux/etherdevice.h> 56 #include <linux/of.h> 57 #include <linux/platform_device.h> 58 #include <linux/kernel.h> 59 #include <linux/types.h> 60 #include <linux/fcntl.h> 61 #include <linux/interrupt.h> 62 #include <linux/ioport.h> 63 #include <linux/in.h> 64 #include <linux/jiffies.h> 65 #include <linux/skbuff.h> 66 #include <linux/spinlock.h> 67 #include <linux/string.h> 68 #include <linux/init.h> 69 #include <linux/bitops.h> 70 #include <linux/delay.h> 71 #include <linux/gfp.h> 72 #include <linux/io.h> 73 74 #include <net/Space.h> 75 76 #include <asm/irq.h> 77 #include <linux/atomic.h> 78 #if ALLOW_DMA 79 #include <asm/dma.h> 80 #endif 81 82 #include "cs89x0.h" 83 84 #define cs89_dbg(val, level, fmt, ...) \ 85 do { \ 86 if (val <= net_debug) \ 87 pr_##level(fmt, ##__VA_ARGS__); \ 88 } while (0) 89 90 static char version[] __initdata = 91 "v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton"; 92 93 #define DRV_NAME "cs89x0" 94 95 /* First, a few definitions that the brave might change. 96 * A zero-terminated list of I/O addresses to be probed. Some special flags.. 97 * Addr & 1 = Read back the address port, look for signature and reset 98 * the page window before probing 99 * Addr & 3 = Reset the page window and probe 100 * The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space, 101 * but it is possible that a Cirrus board could be plugged into the ISA 102 * slots. 103 */ 104 /* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps 105 * them to system IRQ numbers. This mapping is card specific and is set to 106 * the configuration of the Cirrus Eval board for this chip. 107 */ 108 #if IS_ENABLED(CONFIG_CS89x0_ISA) 109 static unsigned int netcard_portlist[] __used __initdata = { 110 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 111 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0 112 }; 113 static unsigned int cs8900_irq_map[] = { 114 10, 11, 12, 5 115 }; 116 #endif 117 118 #if DEBUGGING 119 static unsigned int net_debug = DEBUGGING; 120 #else 121 #define net_debug 0 /* gcc will remove all the debug code for us */ 122 #endif 123 124 /* The number of low I/O ports used by the ethercard. */ 125 #define NETCARD_IO_EXTENT 16 126 127 /* we allow the user to override various values normally set in the EEPROM */ 128 #define FORCE_RJ45 0x0001 /* pick one of these three */ 129 #define FORCE_AUI 0x0002 130 #define FORCE_BNC 0x0004 131 132 #define FORCE_AUTO 0x0010 /* pick one of these three */ 133 #define FORCE_HALF 0x0020 134 #define FORCE_FULL 0x0030 135 136 /* Information that need to be kept for each board. */ 137 struct net_local { 138 int chip_type; /* one of: CS8900, CS8920, CS8920M */ 139 char chip_revision; /* revision letter of the chip ('A'...) */ 140 int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */ 141 int auto_neg_cnf; /* auto-negotiation word from EEPROM */ 142 int adapter_cnf; /* adapter configuration from EEPROM */ 143 int isa_config; /* ISA configuration from EEPROM */ 144 int irq_map; /* IRQ map from EEPROM */ 145 int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */ 146 int curr_rx_cfg; /* a copy of PP_RxCFG */ 147 int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */ 148 int send_underrun; /* keep track of how many underruns in a row we get */ 149 int force; /* force various values; see FORCE* above. */ 150 spinlock_t lock; 151 void __iomem *virt_addr;/* CS89x0 virtual address. */ 152 #if ALLOW_DMA 153 int use_dma; /* Flag: we're using dma */ 154 int dma; /* DMA channel */ 155 int dmasize; /* 16 or 64 */ 156 unsigned char *dma_buff; /* points to the beginning of the buffer */ 157 unsigned char *end_dma_buff; /* points to the end of the buffer */ 158 unsigned char *rx_dma_ptr; /* points to the next packet */ 159 #endif 160 }; 161 162 /* Example routines you must write ;->. */ 163 #define tx_done(dev) 1 164 165 /* 166 * Permit 'cs89x0_dma=N' in the kernel boot environment 167 */ 168 #if !defined(MODULE) 169 #if ALLOW_DMA 170 static int g_cs89x0_dma; 171 172 static int __init dma_fn(char *str) 173 { 174 g_cs89x0_dma = simple_strtol(str, NULL, 0); 175 return 1; 176 } 177 178 __setup("cs89x0_dma=", dma_fn); 179 #endif /* ALLOW_DMA */ 180 181 static int g_cs89x0_media__force; 182 183 static int __init media_fn(char *str) 184 { 185 if (!strcmp(str, "rj45")) 186 g_cs89x0_media__force = FORCE_RJ45; 187 else if (!strcmp(str, "aui")) 188 g_cs89x0_media__force = FORCE_AUI; 189 else if (!strcmp(str, "bnc")) 190 g_cs89x0_media__force = FORCE_BNC; 191 192 return 1; 193 } 194 195 __setup("cs89x0_media=", media_fn); 196 #endif 197 198 static void readwords(struct net_local *lp, int portno, void *buf, int length) 199 { 200 u8 *buf8 = (u8 *)buf; 201 202 do { 203 u16 tmp16; 204 205 tmp16 = ioread16(lp->virt_addr + portno); 206 *buf8++ = (u8)tmp16; 207 *buf8++ = (u8)(tmp16 >> 8); 208 } while (--length); 209 } 210 211 static void writewords(struct net_local *lp, int portno, void *buf, int length) 212 { 213 u8 *buf8 = (u8 *)buf; 214 215 do { 216 u16 tmp16; 217 218 tmp16 = *buf8++; 219 tmp16 |= (*buf8++) << 8; 220 iowrite16(tmp16, lp->virt_addr + portno); 221 } while (--length); 222 } 223 224 static u16 225 readreg(struct net_device *dev, u16 regno) 226 { 227 struct net_local *lp = netdev_priv(dev); 228 229 iowrite16(regno, lp->virt_addr + ADD_PORT); 230 return ioread16(lp->virt_addr + DATA_PORT); 231 } 232 233 static void 234 writereg(struct net_device *dev, u16 regno, u16 value) 235 { 236 struct net_local *lp = netdev_priv(dev); 237 238 iowrite16(regno, lp->virt_addr + ADD_PORT); 239 iowrite16(value, lp->virt_addr + DATA_PORT); 240 } 241 242 static int __init 243 wait_eeprom_ready(struct net_device *dev) 244 { 245 unsigned long timeout = jiffies; 246 /* check to see if the EEPROM is ready, 247 * a timeout is used just in case EEPROM is ready when 248 * SI_BUSY in the PP_SelfST is clear 249 */ 250 while (readreg(dev, PP_SelfST) & SI_BUSY) 251 if (time_after_eq(jiffies, timeout + 40)) 252 return -1; 253 return 0; 254 } 255 256 static int __init 257 get_eeprom_data(struct net_device *dev, int off, int len, int *buffer) 258 { 259 int i; 260 261 cs89_dbg(3, info, "EEPROM data from %x for %x:", off, len); 262 for (i = 0; i < len; i++) { 263 if (wait_eeprom_ready(dev) < 0) 264 return -1; 265 /* Now send the EEPROM read command and EEPROM location to read */ 266 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD); 267 if (wait_eeprom_ready(dev) < 0) 268 return -1; 269 buffer[i] = readreg(dev, PP_EEData); 270 cs89_dbg(3, cont, " %04x", buffer[i]); 271 } 272 cs89_dbg(3, cont, "\n"); 273 return 0; 274 } 275 276 static int __init 277 get_eeprom_cksum(int off, int len, int *buffer) 278 { 279 int i, cksum; 280 281 cksum = 0; 282 for (i = 0; i < len; i++) 283 cksum += buffer[i]; 284 cksum &= 0xffff; 285 if (cksum == 0) 286 return 0; 287 return -1; 288 } 289 290 static void 291 write_irq(struct net_device *dev, int chip_type, int irq) 292 { 293 int i; 294 295 if (chip_type == CS8900) { 296 #if IS_ENABLED(CONFIG_CS89x0_ISA) 297 /* Search the mapping table for the corresponding IRQ pin. */ 298 for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++) 299 if (cs8900_irq_map[i] == irq) 300 break; 301 /* Not found */ 302 if (i == ARRAY_SIZE(cs8900_irq_map)) 303 i = 3; 304 #else 305 /* INTRQ0 pin is used for interrupt generation. */ 306 i = 0; 307 #endif 308 writereg(dev, PP_CS8900_ISAINT, i); 309 } else { 310 writereg(dev, PP_CS8920_ISAINT, irq); 311 } 312 } 313 314 static void 315 count_rx_errors(int status, struct net_device *dev) 316 { 317 dev->stats.rx_errors++; 318 if (status & RX_RUNT) 319 dev->stats.rx_length_errors++; 320 if (status & RX_EXTRA_DATA) 321 dev->stats.rx_length_errors++; 322 if ((status & RX_CRC_ERROR) && !(status & (RX_EXTRA_DATA | RX_RUNT))) 323 /* per str 172 */ 324 dev->stats.rx_crc_errors++; 325 if (status & RX_DRIBBLE) 326 dev->stats.rx_frame_errors++; 327 } 328 329 /********************************* 330 * This page contains DMA routines 331 *********************************/ 332 333 #if ALLOW_DMA 334 335 #define dma_page_eq(ptr1, ptr2) ((long)(ptr1) >> 17 == (long)(ptr2) >> 17) 336 337 static void 338 get_dma_channel(struct net_device *dev) 339 { 340 struct net_local *lp = netdev_priv(dev); 341 342 if (lp->dma) { 343 dev->dma = lp->dma; 344 lp->isa_config |= ISA_RxDMA; 345 } else { 346 if ((lp->isa_config & ANY_ISA_DMA) == 0) 347 return; 348 dev->dma = lp->isa_config & DMA_NO_MASK; 349 if (lp->chip_type == CS8900) 350 dev->dma += 5; 351 if (dev->dma < 5 || dev->dma > 7) { 352 lp->isa_config &= ~ANY_ISA_DMA; 353 return; 354 } 355 } 356 } 357 358 static void 359 write_dma(struct net_device *dev, int chip_type, int dma) 360 { 361 struct net_local *lp = netdev_priv(dev); 362 if ((lp->isa_config & ANY_ISA_DMA) == 0) 363 return; 364 if (chip_type == CS8900) 365 writereg(dev, PP_CS8900_ISADMA, dma - 5); 366 else 367 writereg(dev, PP_CS8920_ISADMA, dma); 368 } 369 370 static void 371 set_dma_cfg(struct net_device *dev) 372 { 373 struct net_local *lp = netdev_priv(dev); 374 375 if (lp->use_dma) { 376 if ((lp->isa_config & ANY_ISA_DMA) == 0) { 377 cs89_dbg(3, err, "set_dma_cfg(): no DMA\n"); 378 return; 379 } 380 if (lp->isa_config & ISA_RxDMA) { 381 lp->curr_rx_cfg |= RX_DMA_ONLY; 382 cs89_dbg(3, info, "set_dma_cfg(): RX_DMA_ONLY\n"); 383 } else { 384 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */ 385 cs89_dbg(3, info, "set_dma_cfg(): AUTO_RX_DMA\n"); 386 } 387 } 388 } 389 390 static int 391 dma_bufcfg(struct net_device *dev) 392 { 393 struct net_local *lp = netdev_priv(dev); 394 if (lp->use_dma) 395 return (lp->isa_config & ANY_ISA_DMA) ? RX_DMA_ENBL : 0; 396 else 397 return 0; 398 } 399 400 static int 401 dma_busctl(struct net_device *dev) 402 { 403 int retval = 0; 404 struct net_local *lp = netdev_priv(dev); 405 if (lp->use_dma) { 406 if (lp->isa_config & ANY_ISA_DMA) 407 retval |= RESET_RX_DMA; /* Reset the DMA pointer */ 408 if (lp->isa_config & DMA_BURST) 409 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */ 410 if (lp->dmasize == 64) 411 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */ 412 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */ 413 } 414 return retval; 415 } 416 417 static void 418 dma_rx(struct net_device *dev) 419 { 420 struct net_local *lp = netdev_priv(dev); 421 struct sk_buff *skb; 422 int status, length; 423 unsigned char *bp = lp->rx_dma_ptr; 424 425 status = bp[0] + (bp[1] << 8); 426 length = bp[2] + (bp[3] << 8); 427 bp += 4; 428 429 cs89_dbg(5, debug, "%s: receiving DMA packet at %lx, status %x, length %x\n", 430 dev->name, (unsigned long)bp, status, length); 431 432 if ((status & RX_OK) == 0) { 433 count_rx_errors(status, dev); 434 goto skip_this_frame; 435 } 436 437 /* Malloc up new buffer. */ 438 skb = netdev_alloc_skb(dev, length + 2); 439 if (skb == NULL) { 440 dev->stats.rx_dropped++; 441 442 /* AKPM: advance bp to the next frame */ 443 skip_this_frame: 444 bp += (length + 3) & ~3; 445 if (bp >= lp->end_dma_buff) 446 bp -= lp->dmasize * 1024; 447 lp->rx_dma_ptr = bp; 448 return; 449 } 450 skb_reserve(skb, 2); /* longword align L3 header */ 451 452 if (bp + length > lp->end_dma_buff) { 453 int semi_cnt = lp->end_dma_buff - bp; 454 skb_put_data(skb, bp, semi_cnt); 455 skb_put_data(skb, lp->dma_buff, length - semi_cnt); 456 } else { 457 skb_put_data(skb, bp, length); 458 } 459 bp += (length + 3) & ~3; 460 if (bp >= lp->end_dma_buff) 461 bp -= lp->dmasize*1024; 462 lp->rx_dma_ptr = bp; 463 464 cs89_dbg(3, info, "%s: received %d byte DMA packet of type %x\n", 465 dev->name, length, 466 ((skb->data[ETH_ALEN + ETH_ALEN] << 8) | 467 skb->data[ETH_ALEN + ETH_ALEN + 1])); 468 469 skb->protocol = eth_type_trans(skb, dev); 470 netif_rx(skb); 471 dev->stats.rx_packets++; 472 dev->stats.rx_bytes += length; 473 } 474 475 static void release_dma_buff(struct net_local *lp) 476 { 477 if (lp->dma_buff) { 478 free_pages((unsigned long)(lp->dma_buff), 479 get_order(lp->dmasize * 1024)); 480 lp->dma_buff = NULL; 481 } 482 } 483 484 #endif /* ALLOW_DMA */ 485 486 static void 487 control_dc_dc(struct net_device *dev, int on_not_off) 488 { 489 struct net_local *lp = netdev_priv(dev); 490 unsigned int selfcontrol; 491 unsigned long timenow = jiffies; 492 /* control the DC to DC convertor in the SelfControl register. 493 * Note: This is hooked up to a general purpose pin, might not 494 * always be a DC to DC convertor. 495 */ 496 497 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */ 498 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off) 499 selfcontrol |= HCB1; 500 else 501 selfcontrol &= ~HCB1; 502 writereg(dev, PP_SelfCTL, selfcontrol); 503 504 /* Wait for the DC/DC converter to power up - 500ms */ 505 while (time_before(jiffies, timenow + HZ)) 506 ; 507 } 508 509 /* send a test packet - return true if carrier bits are ok */ 510 static int 511 send_test_pkt(struct net_device *dev) 512 { 513 struct net_local *lp = netdev_priv(dev); 514 char test_packet[] = { 515 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 516 0, 46, /* A 46 in network order */ 517 0, 0, /* DSAP=0 & SSAP=0 fields */ 518 0xf3, 0 /* Control (Test Req + P bit set) */ 519 }; 520 unsigned long timenow = jiffies; 521 522 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON); 523 524 memcpy(test_packet, dev->dev_addr, ETH_ALEN); 525 memcpy(test_packet + ETH_ALEN, dev->dev_addr, ETH_ALEN); 526 527 iowrite16(TX_AFTER_ALL, lp->virt_addr + TX_CMD_PORT); 528 iowrite16(ETH_ZLEN, lp->virt_addr + TX_LEN_PORT); 529 530 /* Test to see if the chip has allocated memory for the packet */ 531 while (time_before(jiffies, timenow + 5)) 532 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW) 533 break; 534 if (time_after_eq(jiffies, timenow + 5)) 535 return 0; /* this shouldn't happen */ 536 537 /* Write the contents of the packet */ 538 writewords(lp, TX_FRAME_PORT, test_packet, (ETH_ZLEN + 1) >> 1); 539 540 cs89_dbg(1, debug, "Sending test packet "); 541 /* wait a couple of jiffies for packet to be received */ 542 for (timenow = jiffies; time_before(jiffies, timenow + 3);) 543 ; 544 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) { 545 cs89_dbg(1, cont, "succeeded\n"); 546 return 1; 547 } 548 cs89_dbg(1, cont, "failed\n"); 549 return 0; 550 } 551 552 #define DETECTED_NONE 0 553 #define DETECTED_RJ45H 1 554 #define DETECTED_RJ45F 2 555 #define DETECTED_AUI 3 556 #define DETECTED_BNC 4 557 558 static int 559 detect_tp(struct net_device *dev) 560 { 561 struct net_local *lp = netdev_priv(dev); 562 unsigned long timenow = jiffies; 563 int fdx; 564 565 cs89_dbg(1, debug, "%s: Attempting TP\n", dev->name); 566 567 /* If connected to another full duplex capable 10-Base-T card 568 * the link pulses seem to be lost when the auto detect bit in 569 * the LineCTL is set. To overcome this the auto detect bit will 570 * be cleared whilst testing the 10-Base-T interface. This would 571 * not be necessary for the sparrow chip but is simpler to do it 572 * anyway. 573 */ 574 writereg(dev, PP_LineCTL, lp->linectl & ~AUI_ONLY); 575 control_dc_dc(dev, 0); 576 577 /* Delay for the hardware to work out if the TP cable is present 578 * - 150ms 579 */ 580 for (timenow = jiffies; time_before(jiffies, timenow + 15);) 581 ; 582 if ((readreg(dev, PP_LineST) & LINK_OK) == 0) 583 return DETECTED_NONE; 584 585 if (lp->chip_type == CS8900) { 586 switch (lp->force & 0xf0) { 587 #if 0 588 case FORCE_AUTO: 589 pr_info("%s: cs8900 doesn't autonegotiate\n", 590 dev->name); 591 return DETECTED_NONE; 592 #endif 593 /* CS8900 doesn't support AUTO, change to HALF*/ 594 case FORCE_AUTO: 595 lp->force &= ~FORCE_AUTO; 596 lp->force |= FORCE_HALF; 597 break; 598 case FORCE_HALF: 599 break; 600 case FORCE_FULL: 601 writereg(dev, PP_TestCTL, 602 readreg(dev, PP_TestCTL) | FDX_8900); 603 break; 604 } 605 fdx = readreg(dev, PP_TestCTL) & FDX_8900; 606 } else { 607 switch (lp->force & 0xf0) { 608 case FORCE_AUTO: 609 lp->auto_neg_cnf = AUTO_NEG_ENABLE; 610 break; 611 case FORCE_HALF: 612 lp->auto_neg_cnf = 0; 613 break; 614 case FORCE_FULL: 615 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX; 616 break; 617 } 618 619 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK); 620 621 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) { 622 pr_info("%s: negotiating duplex...\n", dev->name); 623 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) { 624 if (time_after(jiffies, timenow + 4000)) { 625 pr_err("**** Full / half duplex auto-negotiation timed out ****\n"); 626 break; 627 } 628 } 629 } 630 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE; 631 } 632 if (fdx) 633 return DETECTED_RJ45F; 634 else 635 return DETECTED_RJ45H; 636 } 637 638 static int 639 detect_bnc(struct net_device *dev) 640 { 641 struct net_local *lp = netdev_priv(dev); 642 643 cs89_dbg(1, debug, "%s: Attempting BNC\n", dev->name); 644 control_dc_dc(dev, 1); 645 646 writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY); 647 648 if (send_test_pkt(dev)) 649 return DETECTED_BNC; 650 else 651 return DETECTED_NONE; 652 } 653 654 static int 655 detect_aui(struct net_device *dev) 656 { 657 struct net_local *lp = netdev_priv(dev); 658 659 cs89_dbg(1, debug, "%s: Attempting AUI\n", dev->name); 660 control_dc_dc(dev, 0); 661 662 writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY); 663 664 if (send_test_pkt(dev)) 665 return DETECTED_AUI; 666 else 667 return DETECTED_NONE; 668 } 669 670 /* We have a good packet(s), get it/them out of the buffers. */ 671 static void 672 net_rx(struct net_device *dev) 673 { 674 struct net_local *lp = netdev_priv(dev); 675 struct sk_buff *skb; 676 int status, length; 677 678 status = ioread16(lp->virt_addr + RX_FRAME_PORT); 679 length = ioread16(lp->virt_addr + RX_FRAME_PORT); 680 681 if ((status & RX_OK) == 0) { 682 count_rx_errors(status, dev); 683 return; 684 } 685 686 /* Malloc up new buffer. */ 687 skb = netdev_alloc_skb(dev, length + 2); 688 if (skb == NULL) { 689 dev->stats.rx_dropped++; 690 return; 691 } 692 skb_reserve(skb, 2); /* longword align L3 header */ 693 694 readwords(lp, RX_FRAME_PORT, skb_put(skb, length), length >> 1); 695 if (length & 1) 696 skb->data[length-1] = ioread16(lp->virt_addr + RX_FRAME_PORT); 697 698 cs89_dbg(3, debug, "%s: received %d byte packet of type %x\n", 699 dev->name, length, 700 (skb->data[ETH_ALEN + ETH_ALEN] << 8) | 701 skb->data[ETH_ALEN + ETH_ALEN + 1]); 702 703 skb->protocol = eth_type_trans(skb, dev); 704 netif_rx(skb); 705 dev->stats.rx_packets++; 706 dev->stats.rx_bytes += length; 707 } 708 709 /* The typical workload of the driver: 710 * Handle the network interface interrupts. 711 */ 712 713 static irqreturn_t net_interrupt(int irq, void *dev_id) 714 { 715 struct net_device *dev = dev_id; 716 struct net_local *lp; 717 int status; 718 int handled = 0; 719 720 lp = netdev_priv(dev); 721 722 /* we MUST read all the events out of the ISQ, otherwise we'll never 723 * get interrupted again. As a consequence, we can't have any limit 724 * on the number of times we loop in the interrupt handler. The 725 * hardware guarantees that eventually we'll run out of events. Of 726 * course, if you're on a slow machine, and packets are arriving 727 * faster than you can read them off, you're screwed. Hasta la 728 * vista, baby! 729 */ 730 while ((status = ioread16(lp->virt_addr + ISQ_PORT))) { 731 cs89_dbg(4, debug, "%s: event=%04x\n", dev->name, status); 732 handled = 1; 733 switch (status & ISQ_EVENT_MASK) { 734 case ISQ_RECEIVER_EVENT: 735 /* Got a packet(s). */ 736 net_rx(dev); 737 break; 738 case ISQ_TRANSMITTER_EVENT: 739 dev->stats.tx_packets++; 740 netif_wake_queue(dev); /* Inform upper layers. */ 741 if ((status & (TX_OK | 742 TX_LOST_CRS | 743 TX_SQE_ERROR | 744 TX_LATE_COL | 745 TX_16_COL)) != TX_OK) { 746 if ((status & TX_OK) == 0) 747 dev->stats.tx_errors++; 748 if (status & TX_LOST_CRS) 749 dev->stats.tx_carrier_errors++; 750 if (status & TX_SQE_ERROR) 751 dev->stats.tx_heartbeat_errors++; 752 if (status & TX_LATE_COL) 753 dev->stats.tx_window_errors++; 754 if (status & TX_16_COL) 755 dev->stats.tx_aborted_errors++; 756 } 757 break; 758 case ISQ_BUFFER_EVENT: 759 if (status & READY_FOR_TX) { 760 /* we tried to transmit a packet earlier, 761 * but inexplicably ran out of buffers. 762 * That shouldn't happen since we only ever 763 * load one packet. Shrug. Do the right 764 * thing anyway. 765 */ 766 netif_wake_queue(dev); /* Inform upper layers. */ 767 } 768 if (status & TX_UNDERRUN) { 769 cs89_dbg(0, err, "%s: transmit underrun\n", 770 dev->name); 771 lp->send_underrun++; 772 if (lp->send_underrun == 3) 773 lp->send_cmd = TX_AFTER_381; 774 else if (lp->send_underrun == 6) 775 lp->send_cmd = TX_AFTER_ALL; 776 /* transmit cycle is done, although 777 * frame wasn't transmitted - this 778 * avoids having to wait for the upper 779 * layers to timeout on us, in the 780 * event of a tx underrun 781 */ 782 netif_wake_queue(dev); /* Inform upper layers. */ 783 } 784 #if ALLOW_DMA 785 if (lp->use_dma && (status & RX_DMA)) { 786 int count = readreg(dev, PP_DmaFrameCnt); 787 while (count) { 788 cs89_dbg(5, debug, 789 "%s: receiving %d DMA frames\n", 790 dev->name, count); 791 if (count > 1) 792 cs89_dbg(2, debug, 793 "%s: receiving %d DMA frames\n", 794 dev->name, count); 795 dma_rx(dev); 796 if (--count == 0) 797 count = readreg(dev, PP_DmaFrameCnt); 798 if (count > 0) 799 cs89_dbg(2, debug, 800 "%s: continuing with %d DMA frames\n", 801 dev->name, count); 802 } 803 } 804 #endif 805 break; 806 case ISQ_RX_MISS_EVENT: 807 dev->stats.rx_missed_errors += (status >> 6); 808 break; 809 case ISQ_TX_COL_EVENT: 810 dev->stats.collisions += (status >> 6); 811 break; 812 } 813 } 814 return IRQ_RETVAL(handled); 815 } 816 817 /* Open/initialize the board. This is called (in the current kernel) 818 sometime after booting when the 'ifconfig' program is run. 819 820 This routine should set everything up anew at each open, even 821 registers that "should" only need to be set once at boot, so that 822 there is non-reboot way to recover if something goes wrong. 823 */ 824 825 /* AKPM: do we need to do any locking here? */ 826 827 static int 828 net_open(struct net_device *dev) 829 { 830 struct net_local *lp = netdev_priv(dev); 831 int result = 0; 832 int i; 833 int ret; 834 835 if (dev->irq < 2) { 836 /* Allow interrupts to be generated by the chip */ 837 /* Cirrus' release had this: */ 838 #if 0 839 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ); 840 #endif 841 /* And 2.3.47 had this: */ 842 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON); 843 844 for (i = 2; i < CS8920_NO_INTS; i++) { 845 if ((1 << i) & lp->irq_map) { 846 if (request_irq(i, net_interrupt, 0, dev->name, 847 dev) == 0) { 848 dev->irq = i; 849 write_irq(dev, lp->chip_type, i); 850 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */ 851 break; 852 } 853 } 854 } 855 856 if (i >= CS8920_NO_INTS) { 857 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */ 858 pr_err("can't get an interrupt\n"); 859 ret = -EAGAIN; 860 goto bad_out; 861 } 862 } else { 863 #if IS_ENABLED(CONFIG_CS89x0_ISA) 864 if (((1 << dev->irq) & lp->irq_map) == 0) { 865 pr_err("%s: IRQ %d is not in our map of allowable IRQs, which is %x\n", 866 dev->name, dev->irq, lp->irq_map); 867 ret = -EAGAIN; 868 goto bad_out; 869 } 870 #endif 871 /* FIXME: Cirrus' release had this: */ 872 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ); 873 /* And 2.3.47 had this: */ 874 #if 0 875 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON); 876 #endif 877 write_irq(dev, lp->chip_type, dev->irq); 878 ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev); 879 if (ret) { 880 pr_err("request_irq(%d) failed\n", dev->irq); 881 goto bad_out; 882 } 883 } 884 885 #if ALLOW_DMA 886 if (lp->use_dma && (lp->isa_config & ANY_ISA_DMA)) { 887 unsigned long flags; 888 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL, 889 get_order(lp->dmasize * 1024)); 890 if (!lp->dma_buff) { 891 pr_err("%s: cannot get %dK memory for DMA\n", 892 dev->name, lp->dmasize); 893 goto release_irq; 894 } 895 cs89_dbg(1, debug, "%s: dma %lx %lx\n", 896 dev->name, 897 (unsigned long)lp->dma_buff, 898 (unsigned long)isa_virt_to_bus(lp->dma_buff)); 899 if ((unsigned long)lp->dma_buff >= MAX_DMA_ADDRESS || 900 !dma_page_eq(lp->dma_buff, 901 lp->dma_buff + lp->dmasize * 1024 - 1)) { 902 pr_err("%s: not usable as DMA buffer\n", dev->name); 903 goto release_irq; 904 } 905 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */ 906 if (request_dma(dev->dma, dev->name)) { 907 pr_err("%s: cannot get dma channel %d\n", 908 dev->name, dev->dma); 909 goto release_irq; 910 } 911 write_dma(dev, lp->chip_type, dev->dma); 912 lp->rx_dma_ptr = lp->dma_buff; 913 lp->end_dma_buff = lp->dma_buff + lp->dmasize * 1024; 914 spin_lock_irqsave(&lp->lock, flags); 915 disable_dma(dev->dma); 916 clear_dma_ff(dev->dma); 917 set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */ 918 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff)); 919 set_dma_count(dev->dma, lp->dmasize * 1024); 920 enable_dma(dev->dma); 921 spin_unlock_irqrestore(&lp->lock, flags); 922 } 923 #endif /* ALLOW_DMA */ 924 925 /* set the Ethernet address */ 926 for (i = 0; i < ETH_ALEN / 2; i++) 927 writereg(dev, PP_IA + i * 2, 928 (dev->dev_addr[i * 2] | 929 (dev->dev_addr[i * 2 + 1] << 8))); 930 931 /* while we're testing the interface, leave interrupts disabled */ 932 writereg(dev, PP_BusCTL, MEMORY_ON); 933 934 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */ 935 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && 936 (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH)) 937 lp->linectl = LOW_RX_SQUELCH; 938 else 939 lp->linectl = 0; 940 941 /* check to make sure that they have the "right" hardware available */ 942 switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) { 943 case A_CNF_MEDIA_10B_T: 944 result = lp->adapter_cnf & A_CNF_10B_T; 945 break; 946 case A_CNF_MEDIA_AUI: 947 result = lp->adapter_cnf & A_CNF_AUI; 948 break; 949 case A_CNF_MEDIA_10B_2: 950 result = lp->adapter_cnf & A_CNF_10B_2; 951 break; 952 default: 953 result = lp->adapter_cnf & (A_CNF_10B_T | 954 A_CNF_AUI | 955 A_CNF_10B_2); 956 } 957 if (!result) { 958 pr_err("%s: EEPROM is configured for unavailable media\n", 959 dev->name); 960 release_dma: 961 #if ALLOW_DMA 962 free_dma(dev->dma); 963 release_irq: 964 release_dma_buff(lp); 965 #endif 966 writereg(dev, PP_LineCTL, 967 readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON)); 968 free_irq(dev->irq, dev); 969 ret = -EAGAIN; 970 goto bad_out; 971 } 972 973 /* set the hardware to the configured choice */ 974 switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) { 975 case A_CNF_MEDIA_10B_T: 976 result = detect_tp(dev); 977 if (result == DETECTED_NONE) { 978 pr_warn("%s: 10Base-T (RJ-45) has no cable\n", 979 dev->name); 980 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ 981 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */ 982 } 983 break; 984 case A_CNF_MEDIA_AUI: 985 result = detect_aui(dev); 986 if (result == DETECTED_NONE) { 987 pr_warn("%s: 10Base-5 (AUI) has no cable\n", dev->name); 988 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ 989 result = DETECTED_AUI; /* Yes! I don't care if I see a carrier */ 990 } 991 break; 992 case A_CNF_MEDIA_10B_2: 993 result = detect_bnc(dev); 994 if (result == DETECTED_NONE) { 995 pr_warn("%s: 10Base-2 (BNC) has no cable\n", dev->name); 996 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ 997 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */ 998 } 999 break; 1000 case A_CNF_MEDIA_AUTO: 1001 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET); 1002 if (lp->adapter_cnf & A_CNF_10B_T) { 1003 result = detect_tp(dev); 1004 if (result != DETECTED_NONE) 1005 break; 1006 } 1007 if (lp->adapter_cnf & A_CNF_AUI) { 1008 result = detect_aui(dev); 1009 if (result != DETECTED_NONE) 1010 break; 1011 } 1012 if (lp->adapter_cnf & A_CNF_10B_2) { 1013 result = detect_bnc(dev); 1014 if (result != DETECTED_NONE) 1015 break; 1016 } 1017 pr_err("%s: no media detected\n", dev->name); 1018 goto release_dma; 1019 } 1020 switch (result) { 1021 case DETECTED_NONE: 1022 pr_err("%s: no network cable attached to configured media\n", 1023 dev->name); 1024 goto release_dma; 1025 case DETECTED_RJ45H: 1026 pr_info("%s: using half-duplex 10Base-T (RJ-45)\n", dev->name); 1027 break; 1028 case DETECTED_RJ45F: 1029 pr_info("%s: using full-duplex 10Base-T (RJ-45)\n", dev->name); 1030 break; 1031 case DETECTED_AUI: 1032 pr_info("%s: using 10Base-5 (AUI)\n", dev->name); 1033 break; 1034 case DETECTED_BNC: 1035 pr_info("%s: using 10Base-2 (BNC)\n", dev->name); 1036 break; 1037 } 1038 1039 /* Turn on both receive and transmit operations */ 1040 writereg(dev, PP_LineCTL, 1041 readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON); 1042 1043 /* Receive only error free packets addressed to this card */ 1044 lp->rx_mode = 0; 1045 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT); 1046 1047 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL; 1048 1049 if (lp->isa_config & STREAM_TRANSFER) 1050 lp->curr_rx_cfg |= RX_STREAM_ENBL; 1051 #if ALLOW_DMA 1052 set_dma_cfg(dev); 1053 #endif 1054 writereg(dev, PP_RxCFG, lp->curr_rx_cfg); 1055 1056 writereg(dev, PP_TxCFG, (TX_LOST_CRS_ENBL | 1057 TX_SQE_ERROR_ENBL | 1058 TX_OK_ENBL | 1059 TX_LATE_COL_ENBL | 1060 TX_JBR_ENBL | 1061 TX_ANY_COL_ENBL | 1062 TX_16_COL_ENBL)); 1063 1064 writereg(dev, PP_BufCFG, (READY_FOR_TX_ENBL | 1065 RX_MISS_COUNT_OVRFLOW_ENBL | 1066 #if ALLOW_DMA 1067 dma_bufcfg(dev) | 1068 #endif 1069 TX_COL_COUNT_OVRFLOW_ENBL | 1070 TX_UNDERRUN_ENBL)); 1071 1072 /* now that we've got our act together, enable everything */ 1073 writereg(dev, PP_BusCTL, (ENABLE_IRQ 1074 | (dev->mem_start ? MEMORY_ON : 0) /* turn memory on */ 1075 #if ALLOW_DMA 1076 | dma_busctl(dev) 1077 #endif 1078 )); 1079 netif_start_queue(dev); 1080 cs89_dbg(1, debug, "net_open() succeeded\n"); 1081 return 0; 1082 bad_out: 1083 return ret; 1084 } 1085 1086 /* The inverse routine to net_open(). */ 1087 static int 1088 net_close(struct net_device *dev) 1089 { 1090 #if ALLOW_DMA 1091 struct net_local *lp = netdev_priv(dev); 1092 #endif 1093 1094 netif_stop_queue(dev); 1095 1096 writereg(dev, PP_RxCFG, 0); 1097 writereg(dev, PP_TxCFG, 0); 1098 writereg(dev, PP_BufCFG, 0); 1099 writereg(dev, PP_BusCTL, 0); 1100 1101 free_irq(dev->irq, dev); 1102 1103 #if ALLOW_DMA 1104 if (lp->use_dma && lp->dma) { 1105 free_dma(dev->dma); 1106 release_dma_buff(lp); 1107 } 1108 #endif 1109 1110 /* Update the statistics here. */ 1111 return 0; 1112 } 1113 1114 /* Get the current statistics. 1115 * This may be called with the card open or closed. 1116 */ 1117 static struct net_device_stats * 1118 net_get_stats(struct net_device *dev) 1119 { 1120 struct net_local *lp = netdev_priv(dev); 1121 unsigned long flags; 1122 1123 spin_lock_irqsave(&lp->lock, flags); 1124 /* Update the statistics from the device registers. */ 1125 dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6); 1126 dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6); 1127 spin_unlock_irqrestore(&lp->lock, flags); 1128 1129 return &dev->stats; 1130 } 1131 1132 static void net_timeout(struct net_device *dev, unsigned int txqueue) 1133 { 1134 /* If we get here, some higher level has decided we are broken. 1135 There should really be a "kick me" function call instead. */ 1136 cs89_dbg(0, err, "%s: transmit timed out, %s?\n", 1137 dev->name, 1138 tx_done(dev) ? "IRQ conflict" : "network cable problem"); 1139 /* Try to restart the adaptor. */ 1140 netif_wake_queue(dev); 1141 } 1142 1143 static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev) 1144 { 1145 struct net_local *lp = netdev_priv(dev); 1146 unsigned long flags; 1147 1148 cs89_dbg(3, debug, "%s: sent %d byte packet of type %x\n", 1149 dev->name, skb->len, 1150 ((skb->data[ETH_ALEN + ETH_ALEN] << 8) | 1151 skb->data[ETH_ALEN + ETH_ALEN + 1])); 1152 1153 /* keep the upload from being interrupted, since we 1154 * ask the chip to start transmitting before the 1155 * whole packet has been completely uploaded. 1156 */ 1157 1158 spin_lock_irqsave(&lp->lock, flags); 1159 netif_stop_queue(dev); 1160 1161 /* initiate a transmit sequence */ 1162 iowrite16(lp->send_cmd, lp->virt_addr + TX_CMD_PORT); 1163 iowrite16(skb->len, lp->virt_addr + TX_LEN_PORT); 1164 1165 /* Test to see if the chip has allocated memory for the packet */ 1166 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) { 1167 /* Gasp! It hasn't. But that shouldn't happen since 1168 * we're waiting for TxOk, so return 1 and requeue this packet. 1169 */ 1170 1171 spin_unlock_irqrestore(&lp->lock, flags); 1172 cs89_dbg(0, err, "Tx buffer not free!\n"); 1173 return NETDEV_TX_BUSY; 1174 } 1175 /* Write the contents of the packet */ 1176 writewords(lp, TX_FRAME_PORT, skb->data, (skb->len + 1) >> 1); 1177 spin_unlock_irqrestore(&lp->lock, flags); 1178 dev->stats.tx_bytes += skb->len; 1179 dev_consume_skb_any(skb); 1180 1181 /* We DO NOT call netif_wake_queue() here. 1182 * We also DO NOT call netif_start_queue(). 1183 * 1184 * Either of these would cause another bottom half run through 1185 * net_send_packet() before this packet has fully gone out. 1186 * That causes us to hit the "Gasp!" above and the send is rescheduled. 1187 * it runs like a dog. We just return and wait for the Tx completion 1188 * interrupt handler to restart the netdevice layer 1189 */ 1190 1191 return NETDEV_TX_OK; 1192 } 1193 1194 static void set_multicast_list(struct net_device *dev) 1195 { 1196 struct net_local *lp = netdev_priv(dev); 1197 unsigned long flags; 1198 u16 cfg; 1199 1200 spin_lock_irqsave(&lp->lock, flags); 1201 if (dev->flags & IFF_PROMISC) 1202 lp->rx_mode = RX_ALL_ACCEPT; 1203 else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) 1204 /* The multicast-accept list is initialized to accept-all, 1205 * and we rely on higher-level filtering for now. 1206 */ 1207 lp->rx_mode = RX_MULTCAST_ACCEPT; 1208 else 1209 lp->rx_mode = 0; 1210 1211 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode); 1212 1213 /* in promiscuous mode, we accept errored packets, 1214 * so we have to enable interrupts on them also 1215 */ 1216 cfg = lp->curr_rx_cfg; 1217 if (lp->rx_mode == RX_ALL_ACCEPT) 1218 cfg |= RX_CRC_ERROR_ENBL | RX_RUNT_ENBL | RX_EXTRA_DATA_ENBL; 1219 writereg(dev, PP_RxCFG, cfg); 1220 spin_unlock_irqrestore(&lp->lock, flags); 1221 } 1222 1223 static int set_mac_address(struct net_device *dev, void *p) 1224 { 1225 int i; 1226 struct sockaddr *addr = p; 1227 1228 if (netif_running(dev)) 1229 return -EBUSY; 1230 1231 eth_hw_addr_set(dev, addr->sa_data); 1232 1233 cs89_dbg(0, debug, "%s: Setting MAC address to %pM\n", 1234 dev->name, dev->dev_addr); 1235 1236 /* set the Ethernet address */ 1237 for (i = 0; i < ETH_ALEN / 2; i++) 1238 writereg(dev, PP_IA + i * 2, 1239 (dev->dev_addr[i * 2] | 1240 (dev->dev_addr[i * 2 + 1] << 8))); 1241 1242 return 0; 1243 } 1244 1245 #ifdef CONFIG_NET_POLL_CONTROLLER 1246 /* 1247 * Polling receive - used by netconsole and other diagnostic tools 1248 * to allow network i/o with interrupts disabled. 1249 */ 1250 static void net_poll_controller(struct net_device *dev) 1251 { 1252 disable_irq(dev->irq); 1253 net_interrupt(dev->irq, dev); 1254 enable_irq(dev->irq); 1255 } 1256 #endif 1257 1258 static const struct net_device_ops net_ops = { 1259 .ndo_open = net_open, 1260 .ndo_stop = net_close, 1261 .ndo_tx_timeout = net_timeout, 1262 .ndo_start_xmit = net_send_packet, 1263 .ndo_get_stats = net_get_stats, 1264 .ndo_set_rx_mode = set_multicast_list, 1265 .ndo_set_mac_address = set_mac_address, 1266 #ifdef CONFIG_NET_POLL_CONTROLLER 1267 .ndo_poll_controller = net_poll_controller, 1268 #endif 1269 .ndo_validate_addr = eth_validate_addr, 1270 }; 1271 1272 static void __init reset_chip(struct net_device *dev) 1273 { 1274 struct net_local *lp = netdev_priv(dev); 1275 unsigned long reset_start_time; 1276 1277 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET); 1278 1279 /* wait 30 ms */ 1280 msleep(30); 1281 1282 if (lp->chip_type != CS8900) { 1283 /* Hardware problem requires PNP registers to be reconfigured after a reset */ 1284 iowrite16(PP_CS8920_ISAINT, lp->virt_addr + ADD_PORT); 1285 iowrite8(dev->irq, lp->virt_addr + DATA_PORT); 1286 iowrite8(0, lp->virt_addr + DATA_PORT + 1); 1287 1288 iowrite16(PP_CS8920_ISAMemB, lp->virt_addr + ADD_PORT); 1289 iowrite8((dev->mem_start >> 16) & 0xff, 1290 lp->virt_addr + DATA_PORT); 1291 iowrite8((dev->mem_start >> 8) & 0xff, 1292 lp->virt_addr + DATA_PORT + 1); 1293 } 1294 1295 /* Wait until the chip is reset */ 1296 reset_start_time = jiffies; 1297 while ((readreg(dev, PP_SelfST) & INIT_DONE) == 0 && 1298 time_before(jiffies, reset_start_time + 2)) 1299 ; 1300 } 1301 1302 /* This is the real probe routine. 1303 * Linux has a history of friendly device probes on the ISA bus. 1304 * A good device probes avoids doing writes, and 1305 * verifies that the correct device exists and functions. 1306 * Return 0 on success. 1307 */ 1308 static int __init 1309 cs89x0_probe1(struct net_device *dev, void __iomem *ioaddr, int modular) 1310 { 1311 struct net_local *lp = netdev_priv(dev); 1312 int i; 1313 int tmp; 1314 unsigned rev_type = 0; 1315 int eeprom_buff[CHKSUM_LEN]; 1316 u8 addr[ETH_ALEN]; 1317 int retval; 1318 1319 /* Initialize the device structure. */ 1320 if (!modular) { 1321 memset(lp, 0, sizeof(*lp)); 1322 spin_lock_init(&lp->lock); 1323 #ifndef MODULE 1324 #if ALLOW_DMA 1325 if (g_cs89x0_dma) { 1326 lp->use_dma = 1; 1327 lp->dma = g_cs89x0_dma; 1328 lp->dmasize = 16; /* Could make this an option... */ 1329 } 1330 #endif 1331 lp->force = g_cs89x0_media__force; 1332 #endif 1333 } 1334 1335 pr_debug("PP_addr at %p[%x]: 0x%x\n", 1336 ioaddr, ADD_PORT, ioread16(ioaddr + ADD_PORT)); 1337 iowrite16(PP_ChipID, ioaddr + ADD_PORT); 1338 1339 tmp = ioread16(ioaddr + DATA_PORT); 1340 if (tmp != CHIP_EISA_ID_SIG) { 1341 pr_debug("%s: incorrect signature at %p[%x]: 0x%x!=" 1342 CHIP_EISA_ID_SIG_STR "\n", 1343 dev->name, ioaddr, DATA_PORT, tmp); 1344 retval = -ENODEV; 1345 goto out1; 1346 } 1347 1348 lp->virt_addr = ioaddr; 1349 1350 /* get the chip type */ 1351 rev_type = readreg(dev, PRODUCT_ID_ADD); 1352 lp->chip_type = rev_type & ~REVISON_BITS; 1353 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A'; 1354 1355 /* Check the chip type and revision in order to set the correct 1356 * send command. CS8920 revision C and CS8900 revision F can use 1357 * the faster send. 1358 */ 1359 lp->send_cmd = TX_AFTER_381; 1360 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F') 1361 lp->send_cmd = TX_NOW; 1362 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C') 1363 lp->send_cmd = TX_NOW; 1364 1365 pr_info_once("%s\n", version); 1366 1367 pr_info("%s: cs89%c0%s rev %c found at %p ", 1368 dev->name, 1369 lp->chip_type == CS8900 ? '0' : '2', 1370 lp->chip_type == CS8920M ? "M" : "", 1371 lp->chip_revision, 1372 lp->virt_addr); 1373 1374 reset_chip(dev); 1375 1376 /* Here we read the current configuration of the chip. 1377 * If there is no Extended EEPROM then the idea is to not disturb 1378 * the chip configuration, it should have been correctly setup by 1379 * automatic EEPROM read on reset. So, if the chip says it read 1380 * the EEPROM the driver will always do *something* instead of 1381 * complain that adapter_cnf is 0. 1382 */ 1383 1384 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) == 1385 (EEPROM_OK | EEPROM_PRESENT)) { 1386 /* Load the MAC. */ 1387 for (i = 0; i < ETH_ALEN / 2; i++) { 1388 unsigned int Addr; 1389 Addr = readreg(dev, PP_IA + i * 2); 1390 addr[i * 2] = Addr & 0xFF; 1391 addr[i * 2 + 1] = Addr >> 8; 1392 } 1393 eth_hw_addr_set(dev, addr); 1394 1395 /* Load the Adapter Configuration. 1396 * Note: Barring any more specific information from some 1397 * other source (ie EEPROM+Schematics), we would not know 1398 * how to operate a 10Base2 interface on the AUI port. 1399 * However, since we do read the status of HCB1 and use 1400 * settings that always result in calls to control_dc_dc(dev,0) 1401 * a BNC interface should work if the enable pin 1402 * (dc/dc converter) is on HCB1. 1403 * It will be called AUI however. 1404 */ 1405 1406 lp->adapter_cnf = 0; 1407 i = readreg(dev, PP_LineCTL); 1408 /* Preserve the setting of the HCB1 pin. */ 1409 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL)) 1410 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY; 1411 /* Save the sqelch bit */ 1412 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH) 1413 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH; 1414 /* Check if the card is in 10Base-t only mode */ 1415 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0) 1416 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T; 1417 /* Check if the card is in AUI only mode */ 1418 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY) 1419 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI; 1420 /* Check if the card is in Auto mode. */ 1421 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET) 1422 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T | 1423 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO; 1424 1425 cs89_dbg(1, info, "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n", 1426 dev->name, i, lp->adapter_cnf); 1427 1428 /* IRQ. Other chips already probe, see below. */ 1429 if (lp->chip_type == CS8900) 1430 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK; 1431 1432 pr_cont("[Cirrus EEPROM] "); 1433 } 1434 1435 pr_cont("\n"); 1436 1437 /* First check to see if an EEPROM is attached. */ 1438 1439 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0) 1440 pr_warn("No EEPROM, relying on command line....\n"); 1441 else if (get_eeprom_data(dev, START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) { 1442 pr_warn("EEPROM read failed, relying on command line\n"); 1443 } else if (get_eeprom_cksum(START_EEPROM_DATA, CHKSUM_LEN, eeprom_buff) < 0) { 1444 /* Check if the chip was able to read its own configuration starting 1445 at 0 in the EEPROM*/ 1446 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) != 1447 (EEPROM_OK | EEPROM_PRESENT)) 1448 pr_warn("Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n"); 1449 1450 } else { 1451 /* This reads an extended EEPROM that is not documented 1452 * in the CS8900 datasheet. 1453 */ 1454 1455 /* get transmission control word but keep the autonegotiation bits */ 1456 if (!lp->auto_neg_cnf) 1457 lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET / 2]; 1458 /* Store adapter configuration */ 1459 if (!lp->adapter_cnf) 1460 lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET / 2]; 1461 /* Store ISA configuration */ 1462 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET / 2]; 1463 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET / 2] << 8; 1464 1465 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */ 1466 /* store the initial memory base address */ 1467 for (i = 0; i < ETH_ALEN / 2; i++) { 1468 addr[i * 2] = eeprom_buff[i]; 1469 addr[i * 2 + 1] = eeprom_buff[i] >> 8; 1470 } 1471 eth_hw_addr_set(dev, addr); 1472 cs89_dbg(1, debug, "%s: new adapter_cnf: 0x%x\n", 1473 dev->name, lp->adapter_cnf); 1474 } 1475 1476 /* allow them to force multiple transceivers. If they force multiple, autosense */ 1477 { 1478 int count = 0; 1479 if (lp->force & FORCE_RJ45) { 1480 lp->adapter_cnf |= A_CNF_10B_T; 1481 count++; 1482 } 1483 if (lp->force & FORCE_AUI) { 1484 lp->adapter_cnf |= A_CNF_AUI; 1485 count++; 1486 } 1487 if (lp->force & FORCE_BNC) { 1488 lp->adapter_cnf |= A_CNF_10B_2; 1489 count++; 1490 } 1491 if (count > 1) 1492 lp->adapter_cnf |= A_CNF_MEDIA_AUTO; 1493 else if (lp->force & FORCE_RJ45) 1494 lp->adapter_cnf |= A_CNF_MEDIA_10B_T; 1495 else if (lp->force & FORCE_AUI) 1496 lp->adapter_cnf |= A_CNF_MEDIA_AUI; 1497 else if (lp->force & FORCE_BNC) 1498 lp->adapter_cnf |= A_CNF_MEDIA_10B_2; 1499 } 1500 1501 cs89_dbg(1, debug, "%s: after force 0x%x, adapter_cnf=0x%x\n", 1502 dev->name, lp->force, lp->adapter_cnf); 1503 1504 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */ 1505 1506 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */ 1507 1508 /* FIXME: we don't set the Ethernet address on the command line. Use 1509 * ifconfig IFACE hw ether AABBCCDDEEFF 1510 */ 1511 1512 pr_info("media %s%s%s", 1513 (lp->adapter_cnf & A_CNF_10B_T) ? "RJ-45," : "", 1514 (lp->adapter_cnf & A_CNF_AUI) ? "AUI," : "", 1515 (lp->adapter_cnf & A_CNF_10B_2) ? "BNC," : ""); 1516 1517 lp->irq_map = 0xffff; 1518 1519 /* If this is a CS8900 then no pnp soft */ 1520 if (lp->chip_type != CS8900 && 1521 /* Check if the ISA IRQ has been set */ 1522 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff, 1523 (i != 0 && i < CS8920_NO_INTS))) { 1524 if (!dev->irq) 1525 dev->irq = i; 1526 } else { 1527 i = lp->isa_config & INT_NO_MASK; 1528 #if IS_ENABLED(CONFIG_CS89x0_ISA) 1529 if (lp->chip_type == CS8900) { 1530 /* Translate the IRQ using the IRQ mapping table. */ 1531 if (i >= ARRAY_SIZE(cs8900_irq_map)) 1532 pr_err("invalid ISA interrupt number %d\n", i); 1533 else 1534 i = cs8900_irq_map[i]; 1535 1536 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */ 1537 } else { 1538 int irq_map_buff[IRQ_MAP_LEN/2]; 1539 1540 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA, 1541 IRQ_MAP_LEN / 2, 1542 irq_map_buff) >= 0) { 1543 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT) 1544 lp->irq_map = ((irq_map_buff[0] >> 8) | 1545 (irq_map_buff[1] << 8)); 1546 } 1547 } 1548 #endif 1549 if (!dev->irq) 1550 dev->irq = i; 1551 } 1552 1553 pr_cont(" IRQ %d", dev->irq); 1554 1555 #if ALLOW_DMA 1556 if (lp->use_dma) { 1557 get_dma_channel(dev); 1558 pr_cont(", DMA %d", dev->dma); 1559 } else 1560 #endif 1561 pr_cont(", programmed I/O"); 1562 1563 /* print the ethernet address. */ 1564 pr_cont(", MAC %pM\n", dev->dev_addr); 1565 1566 dev->netdev_ops = &net_ops; 1567 dev->watchdog_timeo = HZ; 1568 1569 cs89_dbg(0, info, "cs89x0_probe1() successful\n"); 1570 1571 retval = register_netdev(dev); 1572 if (retval) 1573 goto out2; 1574 return 0; 1575 out2: 1576 iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT); 1577 out1: 1578 return retval; 1579 } 1580 1581 #if IS_ENABLED(CONFIG_CS89x0_ISA) 1582 /* 1583 * This function converts the I/O port address used by the cs89x0_probe() and 1584 * init_module() functions to the I/O memory address used by the 1585 * cs89x0_probe1() function. 1586 */ 1587 static int __init 1588 cs89x0_ioport_probe(struct net_device *dev, unsigned long ioport, int modular) 1589 { 1590 struct net_local *lp = netdev_priv(dev); 1591 int ret; 1592 void __iomem *io_mem; 1593 1594 if (!lp) 1595 return -ENOMEM; 1596 1597 dev->base_addr = ioport; 1598 1599 if (!request_region(ioport, NETCARD_IO_EXTENT, DRV_NAME)) { 1600 ret = -EBUSY; 1601 goto out; 1602 } 1603 1604 io_mem = ioport_map(ioport & ~3, NETCARD_IO_EXTENT); 1605 if (!io_mem) { 1606 ret = -ENOMEM; 1607 goto release; 1608 } 1609 1610 /* if they give us an odd I/O address, then do ONE write to 1611 * the address port, to get it back to address zero, where we 1612 * expect to find the EISA signature word. An IO with a base of 0x3 1613 * will skip the test for the ADD_PORT. 1614 */ 1615 if (ioport & 1) { 1616 cs89_dbg(1, info, "%s: odd ioaddr 0x%lx\n", dev->name, ioport); 1617 if ((ioport & 2) != 2) { 1618 if ((ioread16(io_mem + ADD_PORT) & ADD_MASK) != 1619 ADD_SIG) { 1620 pr_err("%s: bad signature 0x%x\n", 1621 dev->name, ioread16(io_mem + ADD_PORT)); 1622 ret = -ENODEV; 1623 goto unmap; 1624 } 1625 } 1626 } 1627 1628 ret = cs89x0_probe1(dev, io_mem, modular); 1629 if (!ret) 1630 goto out; 1631 unmap: 1632 ioport_unmap(io_mem); 1633 release: 1634 release_region(ioport, NETCARD_IO_EXTENT); 1635 out: 1636 return ret; 1637 } 1638 1639 #ifndef MODULE 1640 /* Check for a network adaptor of this type, and return '0' iff one exists. 1641 * If dev->base_addr == 0, probe all likely locations. 1642 * If dev->base_addr == 1, always return failure. 1643 * If dev->base_addr == 2, allocate space for the device and return success 1644 * (detachable devices only). 1645 * Return 0 on success. 1646 */ 1647 1648 struct net_device * __init cs89x0_probe(int unit) 1649 { 1650 struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); 1651 unsigned *port; 1652 int err = 0; 1653 int irq; 1654 int io; 1655 1656 if (!dev) 1657 return ERR_PTR(-ENODEV); 1658 1659 sprintf(dev->name, "eth%d", unit); 1660 netdev_boot_setup_check(dev); 1661 io = dev->base_addr; 1662 irq = dev->irq; 1663 1664 cs89_dbg(0, info, "cs89x0_probe(0x%x)\n", io); 1665 1666 if (io > 0x1ff) { /* Check a single specified location. */ 1667 err = cs89x0_ioport_probe(dev, io, 0); 1668 } else if (io != 0) { /* Don't probe at all. */ 1669 err = -ENXIO; 1670 } else { 1671 for (port = netcard_portlist; *port; port++) { 1672 if (cs89x0_ioport_probe(dev, *port, 0) == 0) 1673 break; 1674 dev->irq = irq; 1675 } 1676 if (!*port) 1677 err = -ENODEV; 1678 } 1679 if (err) 1680 goto out; 1681 return dev; 1682 out: 1683 free_netdev(dev); 1684 pr_warn("no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n"); 1685 return ERR_PTR(err); 1686 } 1687 #else 1688 static struct net_device *dev_cs89x0; 1689 1690 /* Support the 'debug' module parm even if we're compiled for non-debug to 1691 * avoid breaking someone's startup scripts 1692 */ 1693 1694 static int io; 1695 static int irq; 1696 static int debug; 1697 static char media[8]; 1698 static int duplex = -1; 1699 1700 static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */ 1701 static int dma; 1702 static int dmasize = 16; /* or 64 */ 1703 1704 module_param_hw(io, int, ioport, 0); 1705 module_param_hw(irq, int, irq, 0); 1706 module_param(debug, int, 0); 1707 module_param_string(media, media, sizeof(media), 0); 1708 module_param(duplex, int, 0); 1709 module_param_hw(dma , int, dma, 0); 1710 module_param(dmasize , int, 0); 1711 module_param(use_dma , int, 0); 1712 MODULE_PARM_DESC(io, "cs89x0 I/O base address"); 1713 MODULE_PARM_DESC(irq, "cs89x0 IRQ number"); 1714 #if DEBUGGING 1715 MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)"); 1716 #else 1717 MODULE_PARM_DESC(debug, "(ignored)"); 1718 #endif 1719 MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)"); 1720 /* No other value than -1 for duplex seems to be currently interpreted */ 1721 MODULE_PARM_DESC(duplex, "(ignored)"); 1722 #if ALLOW_DMA 1723 MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0"); 1724 MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0"); 1725 MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)"); 1726 #else 1727 MODULE_PARM_DESC(dma , "(ignored)"); 1728 MODULE_PARM_DESC(dmasize , "(ignored)"); 1729 MODULE_PARM_DESC(use_dma , "(ignored)"); 1730 #endif 1731 1732 MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton"); 1733 MODULE_LICENSE("GPL"); 1734 1735 /* 1736 * media=t - specify media type 1737 * or media=2 1738 * or media=aui 1739 * or medai=auto 1740 * duplex=0 - specify forced half/full/autonegotiate duplex 1741 * debug=# - debug level 1742 * 1743 * Default Chip Configuration: 1744 * DMA Burst = enabled 1745 * IOCHRDY Enabled = enabled 1746 * UseSA = enabled 1747 * CS8900 defaults to half-duplex if not specified on command-line 1748 * CS8920 defaults to autoneg if not specified on command-line 1749 * Use reset defaults for other config parameters 1750 * 1751 * Assumptions: 1752 * media type specified is supported (circuitry is present) 1753 * if memory address is > 1MB, then required mem decode hw is present 1754 * if 10B-2, then agent other than driver will enable DC/DC converter 1755 * (hw or software util) 1756 */ 1757 1758 static int __init cs89x0_isa_init_module(void) 1759 { 1760 struct net_device *dev; 1761 struct net_local *lp; 1762 int ret = 0; 1763 1764 #if DEBUGGING 1765 net_debug = debug; 1766 #else 1767 debug = 0; 1768 #endif 1769 dev = alloc_etherdev(sizeof(struct net_local)); 1770 if (!dev) 1771 return -ENOMEM; 1772 1773 dev->irq = irq; 1774 dev->base_addr = io; 1775 lp = netdev_priv(dev); 1776 1777 #if ALLOW_DMA 1778 if (use_dma) { 1779 lp->use_dma = use_dma; 1780 lp->dma = dma; 1781 lp->dmasize = dmasize; 1782 } 1783 #endif 1784 1785 spin_lock_init(&lp->lock); 1786 1787 /* boy, they'd better get these right */ 1788 if (!strcmp(media, "rj45")) 1789 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T; 1790 else if (!strcmp(media, "aui")) 1791 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI; 1792 else if (!strcmp(media, "bnc")) 1793 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2; 1794 else 1795 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T; 1796 1797 if (duplex == -1) 1798 lp->auto_neg_cnf = AUTO_NEG_ENABLE; 1799 1800 if (io == 0) { 1801 pr_err("Module autoprobing not allowed\n"); 1802 pr_err("Append io=0xNNN\n"); 1803 ret = -EPERM; 1804 goto out; 1805 } else if (io <= 0x1ff) { 1806 ret = -ENXIO; 1807 goto out; 1808 } 1809 1810 #if ALLOW_DMA 1811 if (use_dma && dmasize != 16 && dmasize != 64) { 1812 pr_err("dma size must be either 16K or 64K, not %dK\n", 1813 dmasize); 1814 ret = -EPERM; 1815 goto out; 1816 } 1817 #endif 1818 ret = cs89x0_ioport_probe(dev, io, 1); 1819 if (ret) 1820 goto out; 1821 1822 dev_cs89x0 = dev; 1823 return 0; 1824 out: 1825 free_netdev(dev); 1826 return ret; 1827 } 1828 module_init(cs89x0_isa_init_module); 1829 1830 static void __exit cs89x0_isa_cleanup_module(void) 1831 { 1832 struct net_local *lp = netdev_priv(dev_cs89x0); 1833 1834 unregister_netdev(dev_cs89x0); 1835 iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT); 1836 ioport_unmap(lp->virt_addr); 1837 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT); 1838 free_netdev(dev_cs89x0); 1839 } 1840 module_exit(cs89x0_isa_cleanup_module); 1841 #endif /* MODULE */ 1842 #endif /* CONFIG_CS89x0_ISA */ 1843 1844 #if IS_ENABLED(CONFIG_CS89x0_PLATFORM) 1845 static int __init cs89x0_platform_probe(struct platform_device *pdev) 1846 { 1847 struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); 1848 void __iomem *virt_addr; 1849 int err; 1850 1851 if (!dev) 1852 return -ENOMEM; 1853 1854 dev->irq = platform_get_irq(pdev, 0); 1855 if (dev->irq < 0) { 1856 err = dev->irq; 1857 goto free; 1858 } 1859 1860 virt_addr = devm_platform_ioremap_resource(pdev, 0); 1861 if (IS_ERR(virt_addr)) { 1862 err = PTR_ERR(virt_addr); 1863 goto free; 1864 } 1865 1866 err = cs89x0_probe1(dev, virt_addr, 0); 1867 if (err) { 1868 dev_warn(&dev->dev, "no cs8900 or cs8920 detected\n"); 1869 goto free; 1870 } 1871 1872 platform_set_drvdata(pdev, dev); 1873 return 0; 1874 1875 free: 1876 free_netdev(dev); 1877 return err; 1878 } 1879 1880 static void cs89x0_platform_remove(struct platform_device *pdev) 1881 { 1882 struct net_device *dev = platform_get_drvdata(pdev); 1883 1884 /* This platform_get_resource() call will not return NULL, because 1885 * the same call in cs89x0_platform_probe() has returned a non NULL 1886 * value. 1887 */ 1888 unregister_netdev(dev); 1889 free_netdev(dev); 1890 } 1891 1892 static const struct of_device_id __maybe_unused cs89x0_match[] = { 1893 { .compatible = "cirrus,cs8900", }, 1894 { .compatible = "cirrus,cs8920", }, 1895 { }, 1896 }; 1897 MODULE_DEVICE_TABLE(of, cs89x0_match); 1898 1899 static struct platform_driver cs89x0_driver = { 1900 .driver = { 1901 .name = DRV_NAME, 1902 .of_match_table = of_match_ptr(cs89x0_match), 1903 }, 1904 .remove = cs89x0_platform_remove, 1905 }; 1906 1907 module_platform_driver_probe(cs89x0_driver, cs89x0_platform_probe); 1908 1909 #endif /* CONFIG_CS89x0_PLATFORM */ 1910 1911 MODULE_LICENSE("GPL"); 1912 MODULE_DESCRIPTION("Crystal Semiconductor (Now Cirrus Logic) CS89[02]0 network driver"); 1913 MODULE_AUTHOR("Russell Nelson <nelson@crynwr.com>"); 1914