1/* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $ 2 * lance.c: Linux/Sparc/Lance driver 3 * 4 * Written 1995, 1996 by Miguel de Icaza 5 * Sources: 6 * The Linux depca driver 7 * The Linux lance driver. 8 * The Linux skeleton driver. 9 * The NetBSD Sparc/Lance driver. 10 * Theo de Raadt (deraadt@openbsd.org) 11 * NCR92C990 Lan Controller manual 12 * 13 * 1.4: 14 * Added support to run with a ledma on the Sun4m 15 * 16 * 1.5: 17 * Added multiple card detection. 18 * 19 * 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost 20 * (ecd@skynet.be) 21 * 22 * 5/15/96: auto carrier detection on sun4m by Eddie C. Dost 23 * (ecd@skynet.be) 24 * 25 * 5/17/96: lebuffer on scsi/ether cards now work David S. Miller 26 * (davem@caip.rutgers.edu) 27 * 28 * 5/29/96: override option 'tpe-link-test?', if it is 'false', as 29 * this disables auto carrier detection on sun4m. Eddie C. Dost 30 * (ecd@skynet.be) 31 * 32 * 1.7: 33 * 6/26/96: Bug fix for multiple ledmas, miguel. 34 * 35 * 1.8: 36 * Stole multicast code from depca.c, fixed lance_tx. 37 * 38 * 1.9: 39 * 8/21/96: Fixed the multicast code (Pedro Roque) 40 * 41 * 8/28/96: Send fake packet in lance_open() if auto_select is true, 42 * so we can detect the carrier loss condition in time. 43 * Eddie C. Dost (ecd@skynet.be) 44 * 45 * 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an 46 * MNA trap during chksum_partial_copy(). (ecd@skynet.be) 47 * 48 * 11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be) 49 * 50 * 12/22/96: Don't loop forever in lance_rx() on incomplete packets. 51 * This was the sun4c killer. Shit, stupid bug. 52 * (ecd@skynet.be) 53 * 54 * 1.10: 55 * 1/26/97: Modularize driver. (ecd@skynet.be) 56 * 57 * 1.11: 58 * 12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz) 59 * 60 * 1.12: 61 * 11/3/99: Fixed SMP race in lance_start_xmit found by davem. 62 * Anton Blanchard (anton@progsoc.uts.edu.au) 63 * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces. 64 * David S. Miller (davem@redhat.com) 65 * 2.01: 66 * 11/08/01: Use library crc32 functions (Matt_Domsch@dell.com) 67 * 68 */ 69 70#undef DEBUG_DRIVER 71 72static char lancestr[] = "LANCE"; 73 74#include <linux/module.h> 75#include <linux/kernel.h> 76#include <linux/types.h> 77#include <linux/fcntl.h> 78#include <linux/interrupt.h> 79#include <linux/ioport.h> 80#include <linux/in.h> 81#include <linux/string.h> 82#include <linux/delay.h> 83#include <linux/crc32.h> 84#include <linux/errno.h> 85#include <linux/socket.h> /* Used for the temporal inet entries and routing */ 86#include <linux/route.h> 87#include <linux/netdevice.h> 88#include <linux/etherdevice.h> 89#include <linux/skbuff.h> 90#include <linux/ethtool.h> 91#include <linux/bitops.h> 92#include <linux/dma-mapping.h> 93#include <linux/of.h> 94#include <linux/of_device.h> 95#include <linux/gfp.h> 96 97#include <asm/io.h> 98#include <asm/dma.h> 99#include <asm/pgtable.h> 100#include <asm/byteorder.h> /* Used by the checksum routines */ 101#include <asm/idprom.h> 102#include <asm/prom.h> 103#include <asm/auxio.h> /* For tpe-link-test? setting */ 104#include <asm/irq.h> 105 106#define DRV_NAME "sunlance" 107#define DRV_VERSION "2.02" 108#define DRV_RELDATE "8/24/03" 109#define DRV_AUTHOR "Miguel de Icaza (miguel@nuclecu.unam.mx)" 110 111static char version[] = 112 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n"; 113 114MODULE_VERSION(DRV_VERSION); 115MODULE_AUTHOR(DRV_AUTHOR); 116MODULE_DESCRIPTION("Sun Lance ethernet driver"); 117MODULE_LICENSE("GPL"); 118 119/* Define: 2^4 Tx buffers and 2^4 Rx buffers */ 120#ifndef LANCE_LOG_TX_BUFFERS 121#define LANCE_LOG_TX_BUFFERS 4 122#define LANCE_LOG_RX_BUFFERS 4 123#endif 124 125#define LE_CSR0 0 126#define LE_CSR1 1 127#define LE_CSR2 2 128#define LE_CSR3 3 129 130#define LE_MO_PROM 0x8000 /* Enable promiscuous mode */ 131 132#define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */ 133#define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */ 134#define LE_C0_CERR 0x2000 /* SQE: Signal quality error */ 135#define LE_C0_MISS 0x1000 /* MISS: Missed a packet */ 136#define LE_C0_MERR 0x0800 /* ME: Memory error */ 137#define LE_C0_RINT 0x0400 /* Received interrupt */ 138#define LE_C0_TINT 0x0200 /* Transmitter Interrupt */ 139#define LE_C0_IDON 0x0100 /* IFIN: Init finished. */ 140#define LE_C0_INTR 0x0080 /* Interrupt or error */ 141#define LE_C0_INEA 0x0040 /* Interrupt enable */ 142#define LE_C0_RXON 0x0020 /* Receiver on */ 143#define LE_C0_TXON 0x0010 /* Transmitter on */ 144#define LE_C0_TDMD 0x0008 /* Transmitter demand */ 145#define LE_C0_STOP 0x0004 /* Stop the card */ 146#define LE_C0_STRT 0x0002 /* Start the card */ 147#define LE_C0_INIT 0x0001 /* Init the card */ 148 149#define LE_C3_BSWP 0x4 /* SWAP */ 150#define LE_C3_ACON 0x2 /* ALE Control */ 151#define LE_C3_BCON 0x1 /* Byte control */ 152 153/* Receive message descriptor 1 */ 154#define LE_R1_OWN 0x80 /* Who owns the entry */ 155#define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */ 156#define LE_R1_FRA 0x20 /* FRA: Frame error */ 157#define LE_R1_OFL 0x10 /* OFL: Frame overflow */ 158#define LE_R1_CRC 0x08 /* CRC error */ 159#define LE_R1_BUF 0x04 /* BUF: Buffer error */ 160#define LE_R1_SOP 0x02 /* Start of packet */ 161#define LE_R1_EOP 0x01 /* End of packet */ 162#define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */ 163 164#define LE_T1_OWN 0x80 /* Lance owns the packet */ 165#define LE_T1_ERR 0x40 /* Error summary */ 166#define LE_T1_EMORE 0x10 /* Error: more than one retry needed */ 167#define LE_T1_EONE 0x08 /* Error: one retry needed */ 168#define LE_T1_EDEF 0x04 /* Error: deferred */ 169#define LE_T1_SOP 0x02 /* Start of packet */ 170#define LE_T1_EOP 0x01 /* End of packet */ 171#define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */ 172 173#define LE_T3_BUF 0x8000 /* Buffer error */ 174#define LE_T3_UFL 0x4000 /* Error underflow */ 175#define LE_T3_LCOL 0x1000 /* Error late collision */ 176#define LE_T3_CLOS 0x0800 /* Error carrier loss */ 177#define LE_T3_RTY 0x0400 /* Error retry */ 178#define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */ 179 180#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS)) 181#define TX_RING_MOD_MASK (TX_RING_SIZE - 1) 182#define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29) 183#define TX_NEXT(__x) (((__x)+1) & TX_RING_MOD_MASK) 184 185#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS)) 186#define RX_RING_MOD_MASK (RX_RING_SIZE - 1) 187#define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29) 188#define RX_NEXT(__x) (((__x)+1) & RX_RING_MOD_MASK) 189 190#define PKT_BUF_SZ 1544 191#define RX_BUFF_SIZE PKT_BUF_SZ 192#define TX_BUFF_SIZE PKT_BUF_SZ 193 194struct lance_rx_desc { 195 u16 rmd0; /* low address of packet */ 196 u8 rmd1_bits; /* descriptor bits */ 197 u8 rmd1_hadr; /* high address of packet */ 198 s16 length; /* This length is 2s complement (negative)! 199 * Buffer length 200 */ 201 u16 mblength; /* This is the actual number of bytes received */ 202}; 203 204struct lance_tx_desc { 205 u16 tmd0; /* low address of packet */ 206 u8 tmd1_bits; /* descriptor bits */ 207 u8 tmd1_hadr; /* high address of packet */ 208 s16 length; /* Length is 2s complement (negative)! */ 209 u16 misc; 210}; 211 212/* The LANCE initialization block, described in databook. */ 213/* On the Sparc, this block should be on a DMA region */ 214struct lance_init_block { 215 u16 mode; /* Pre-set mode (reg. 15) */ 216 u8 phys_addr[6]; /* Physical ethernet address */ 217 u32 filter[2]; /* Multicast filter. */ 218 219 /* Receive and transmit ring base, along with extra bits. */ 220 u16 rx_ptr; /* receive descriptor addr */ 221 u16 rx_len; /* receive len and high addr */ 222 u16 tx_ptr; /* transmit descriptor addr */ 223 u16 tx_len; /* transmit len and high addr */ 224 225 /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */ 226 struct lance_rx_desc brx_ring[RX_RING_SIZE]; 227 struct lance_tx_desc btx_ring[TX_RING_SIZE]; 228 229 u8 tx_buf [TX_RING_SIZE][TX_BUFF_SIZE]; 230 u8 pad[2]; /* align rx_buf for copy_and_sum(). */ 231 u8 rx_buf [RX_RING_SIZE][RX_BUFF_SIZE]; 232}; 233 234#define libdesc_offset(rt, elem) \ 235((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem]))))) 236 237#define libbuff_offset(rt, elem) \ 238((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0]))))) 239 240struct lance_private { 241 void __iomem *lregs; /* Lance RAP/RDP regs. */ 242 void __iomem *dregs; /* DMA controller regs. */ 243 struct lance_init_block __iomem *init_block_iomem; 244 struct lance_init_block *init_block_mem; 245 246 spinlock_t lock; 247 248 int rx_new, tx_new; 249 int rx_old, tx_old; 250 251 struct platform_device *ledma; /* If set this points to ledma */ 252 char tpe; /* cable-selection is TPE */ 253 char auto_select; /* cable-selection by carrier */ 254 char burst_sizes; /* ledma SBus burst sizes */ 255 char pio_buffer; /* init block in PIO space? */ 256 257 unsigned short busmaster_regval; 258 259 void (*init_ring)(struct net_device *); 260 void (*rx)(struct net_device *); 261 void (*tx)(struct net_device *); 262 263 char *name; 264 dma_addr_t init_block_dvma; 265 struct net_device *dev; /* Backpointer */ 266 struct platform_device *op; 267 struct platform_device *lebuffer; 268 struct timer_list multicast_timer; 269}; 270 271#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\ 272 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\ 273 lp->tx_old - lp->tx_new-1) 274 275/* Lance registers. */ 276#define RDP 0x00UL /* register data port */ 277#define RAP 0x02UL /* register address port */ 278#define LANCE_REG_SIZE 0x04UL 279 280#define STOP_LANCE(__lp) \ 281do { void __iomem *__base = (__lp)->lregs; \ 282 sbus_writew(LE_CSR0, __base + RAP); \ 283 sbus_writew(LE_C0_STOP, __base + RDP); \ 284} while (0) 285 286int sparc_lance_debug = 2; 287 288/* The Lance uses 24 bit addresses */ 289/* On the Sun4c the DVMA will provide the remaining bytes for us */ 290/* On the Sun4m we have to instruct the ledma to provide them */ 291/* Even worse, on scsi/ether SBUS cards, the init block and the 292 * transmit/receive buffers are addresses as offsets from absolute 293 * zero on the lebuffer PIO area. -DaveM 294 */ 295 296#define LANCE_ADDR(x) ((long)(x) & ~0xff000000) 297 298/* Load the CSR registers */ 299static void load_csrs(struct lance_private *lp) 300{ 301 u32 leptr; 302 303 if (lp->pio_buffer) 304 leptr = 0; 305 else 306 leptr = LANCE_ADDR(lp->init_block_dvma); 307 308 sbus_writew(LE_CSR1, lp->lregs + RAP); 309 sbus_writew(leptr & 0xffff, lp->lregs + RDP); 310 sbus_writew(LE_CSR2, lp->lregs + RAP); 311 sbus_writew(leptr >> 16, lp->lregs + RDP); 312 sbus_writew(LE_CSR3, lp->lregs + RAP); 313 sbus_writew(lp->busmaster_regval, lp->lregs + RDP); 314 315 /* Point back to csr0 */ 316 sbus_writew(LE_CSR0, lp->lregs + RAP); 317} 318 319/* Setup the Lance Rx and Tx rings */ 320static void lance_init_ring_dvma(struct net_device *dev) 321{ 322 struct lance_private *lp = netdev_priv(dev); 323 struct lance_init_block *ib = lp->init_block_mem; 324 dma_addr_t aib = lp->init_block_dvma; 325 __u32 leptr; 326 int i; 327 328 /* Lock out other processes while setting up hardware */ 329 netif_stop_queue(dev); 330 lp->rx_new = lp->tx_new = 0; 331 lp->rx_old = lp->tx_old = 0; 332 333 /* Copy the ethernet address to the lance init block 334 * Note that on the sparc you need to swap the ethernet address. 335 */ 336 ib->phys_addr [0] = dev->dev_addr [1]; 337 ib->phys_addr [1] = dev->dev_addr [0]; 338 ib->phys_addr [2] = dev->dev_addr [3]; 339 ib->phys_addr [3] = dev->dev_addr [2]; 340 ib->phys_addr [4] = dev->dev_addr [5]; 341 ib->phys_addr [5] = dev->dev_addr [4]; 342 343 /* Setup the Tx ring entries */ 344 for (i = 0; i < TX_RING_SIZE; i++) { 345 leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i)); 346 ib->btx_ring [i].tmd0 = leptr; 347 ib->btx_ring [i].tmd1_hadr = leptr >> 16; 348 ib->btx_ring [i].tmd1_bits = 0; 349 ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */ 350 ib->btx_ring [i].misc = 0; 351 } 352 353 /* Setup the Rx ring entries */ 354 for (i = 0; i < RX_RING_SIZE; i++) { 355 leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i)); 356 357 ib->brx_ring [i].rmd0 = leptr; 358 ib->brx_ring [i].rmd1_hadr = leptr >> 16; 359 ib->brx_ring [i].rmd1_bits = LE_R1_OWN; 360 ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000; 361 ib->brx_ring [i].mblength = 0; 362 } 363 364 /* Setup the initialization block */ 365 366 /* Setup rx descriptor pointer */ 367 leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0)); 368 ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16); 369 ib->rx_ptr = leptr; 370 371 /* Setup tx descriptor pointer */ 372 leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0)); 373 ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16); 374 ib->tx_ptr = leptr; 375} 376 377static void lance_init_ring_pio(struct net_device *dev) 378{ 379 struct lance_private *lp = netdev_priv(dev); 380 struct lance_init_block __iomem *ib = lp->init_block_iomem; 381 u32 leptr; 382 int i; 383 384 /* Lock out other processes while setting up hardware */ 385 netif_stop_queue(dev); 386 lp->rx_new = lp->tx_new = 0; 387 lp->rx_old = lp->tx_old = 0; 388 389 /* Copy the ethernet address to the lance init block 390 * Note that on the sparc you need to swap the ethernet address. 391 */ 392 sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]); 393 sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]); 394 sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]); 395 sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]); 396 sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]); 397 sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]); 398 399 /* Setup the Tx ring entries */ 400 for (i = 0; i < TX_RING_SIZE; i++) { 401 leptr = libbuff_offset(tx_buf, i); 402 sbus_writew(leptr, &ib->btx_ring [i].tmd0); 403 sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr); 404 sbus_writeb(0, &ib->btx_ring [i].tmd1_bits); 405 406 /* The ones required by tmd2 */ 407 sbus_writew(0xf000, &ib->btx_ring [i].length); 408 sbus_writew(0, &ib->btx_ring [i].misc); 409 } 410 411 /* Setup the Rx ring entries */ 412 for (i = 0; i < RX_RING_SIZE; i++) { 413 leptr = libbuff_offset(rx_buf, i); 414 415 sbus_writew(leptr, &ib->brx_ring [i].rmd0); 416 sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr); 417 sbus_writeb(LE_R1_OWN, &ib->brx_ring [i].rmd1_bits); 418 sbus_writew(-RX_BUFF_SIZE|0xf000, 419 &ib->brx_ring [i].length); 420 sbus_writew(0, &ib->brx_ring [i].mblength); 421 } 422 423 /* Setup the initialization block */ 424 425 /* Setup rx descriptor pointer */ 426 leptr = libdesc_offset(brx_ring, 0); 427 sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16), 428 &ib->rx_len); 429 sbus_writew(leptr, &ib->rx_ptr); 430 431 /* Setup tx descriptor pointer */ 432 leptr = libdesc_offset(btx_ring, 0); 433 sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16), 434 &ib->tx_len); 435 sbus_writew(leptr, &ib->tx_ptr); 436} 437 438static void init_restart_ledma(struct lance_private *lp) 439{ 440 u32 csr = sbus_readl(lp->dregs + DMA_CSR); 441 442 if (!(csr & DMA_HNDL_ERROR)) { 443 /* E-Cache draining */ 444 while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN) 445 barrier(); 446 } 447 448 csr = sbus_readl(lp->dregs + DMA_CSR); 449 csr &= ~DMA_E_BURSTS; 450 if (lp->burst_sizes & DMA_BURST32) 451 csr |= DMA_E_BURST32; 452 else 453 csr |= DMA_E_BURST16; 454 455 csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV); 456 457 if (lp->tpe) 458 csr |= DMA_EN_ENETAUI; 459 else 460 csr &= ~DMA_EN_ENETAUI; 461 udelay(20); 462 sbus_writel(csr, lp->dregs + DMA_CSR); 463 udelay(200); 464} 465 466static int init_restart_lance(struct lance_private *lp) 467{ 468 u16 regval = 0; 469 int i; 470 471 if (lp->dregs) 472 init_restart_ledma(lp); 473 474 sbus_writew(LE_CSR0, lp->lregs + RAP); 475 sbus_writew(LE_C0_INIT, lp->lregs + RDP); 476 477 /* Wait for the lance to complete initialization */ 478 for (i = 0; i < 100; i++) { 479 regval = sbus_readw(lp->lregs + RDP); 480 481 if (regval & (LE_C0_ERR | LE_C0_IDON)) 482 break; 483 barrier(); 484 } 485 if (i == 100 || (regval & LE_C0_ERR)) { 486 printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n", 487 i, regval); 488 if (lp->dregs) 489 printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR)); 490 return -1; 491 } 492 493 /* Clear IDON by writing a "1", enable interrupts and start lance */ 494 sbus_writew(LE_C0_IDON, lp->lregs + RDP); 495 sbus_writew(LE_C0_INEA | LE_C0_STRT, lp->lregs + RDP); 496 497 if (lp->dregs) { 498 u32 csr = sbus_readl(lp->dregs + DMA_CSR); 499 500 csr |= DMA_INT_ENAB; 501 sbus_writel(csr, lp->dregs + DMA_CSR); 502 } 503 504 return 0; 505} 506 507static void lance_rx_dvma(struct net_device *dev) 508{ 509 struct lance_private *lp = netdev_priv(dev); 510 struct lance_init_block *ib = lp->init_block_mem; 511 struct lance_rx_desc *rd; 512 u8 bits; 513 int len, entry = lp->rx_new; 514 struct sk_buff *skb; 515 516 for (rd = &ib->brx_ring [entry]; 517 !((bits = rd->rmd1_bits) & LE_R1_OWN); 518 rd = &ib->brx_ring [entry]) { 519 520 /* We got an incomplete frame? */ 521 if ((bits & LE_R1_POK) != LE_R1_POK) { 522 dev->stats.rx_over_errors++; 523 dev->stats.rx_errors++; 524 } else if (bits & LE_R1_ERR) { 525 /* Count only the end frame as a rx error, 526 * not the beginning 527 */ 528 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++; 529 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++; 530 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++; 531 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++; 532 if (bits & LE_R1_EOP) dev->stats.rx_errors++; 533 } else { 534 len = (rd->mblength & 0xfff) - 4; 535 skb = netdev_alloc_skb(dev, len + 2); 536 537 if (skb == NULL) { 538 dev->stats.rx_dropped++; 539 rd->mblength = 0; 540 rd->rmd1_bits = LE_R1_OWN; 541 lp->rx_new = RX_NEXT(entry); 542 return; 543 } 544 545 dev->stats.rx_bytes += len; 546 547 skb_reserve(skb, 2); /* 16 byte align */ 548 skb_put(skb, len); /* make room */ 549 skb_copy_to_linear_data(skb, 550 (unsigned char *)&(ib->rx_buf [entry][0]), 551 len); 552 skb->protocol = eth_type_trans(skb, dev); 553 netif_rx(skb); 554 dev->stats.rx_packets++; 555 } 556 557 /* Return the packet to the pool */ 558 rd->mblength = 0; 559 rd->rmd1_bits = LE_R1_OWN; 560 entry = RX_NEXT(entry); 561 } 562 563 lp->rx_new = entry; 564} 565 566static void lance_tx_dvma(struct net_device *dev) 567{ 568 struct lance_private *lp = netdev_priv(dev); 569 struct lance_init_block *ib = lp->init_block_mem; 570 int i, j; 571 572 spin_lock(&lp->lock); 573 574 j = lp->tx_old; 575 for (i = j; i != lp->tx_new; i = j) { 576 struct lance_tx_desc *td = &ib->btx_ring [i]; 577 u8 bits = td->tmd1_bits; 578 579 /* If we hit a packet not owned by us, stop */ 580 if (bits & LE_T1_OWN) 581 break; 582 583 if (bits & LE_T1_ERR) { 584 u16 status = td->misc; 585 586 dev->stats.tx_errors++; 587 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++; 588 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++; 589 590 if (status & LE_T3_CLOS) { 591 dev->stats.tx_carrier_errors++; 592 if (lp->auto_select) { 593 lp->tpe = 1 - lp->tpe; 594 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n", 595 dev->name, lp->tpe?"TPE":"AUI"); 596 STOP_LANCE(lp); 597 lp->init_ring(dev); 598 load_csrs(lp); 599 init_restart_lance(lp); 600 goto out; 601 } 602 } 603 604 /* Buffer errors and underflows turn off the 605 * transmitter, restart the adapter. 606 */ 607 if (status & (LE_T3_BUF|LE_T3_UFL)) { 608 dev->stats.tx_fifo_errors++; 609 610 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n", 611 dev->name); 612 STOP_LANCE(lp); 613 lp->init_ring(dev); 614 load_csrs(lp); 615 init_restart_lance(lp); 616 goto out; 617 } 618 } else if ((bits & LE_T1_POK) == LE_T1_POK) { 619 /* 620 * So we don't count the packet more than once. 621 */ 622 td->tmd1_bits = bits & ~(LE_T1_POK); 623 624 /* One collision before packet was sent. */ 625 if (bits & LE_T1_EONE) 626 dev->stats.collisions++; 627 628 /* More than one collision, be optimistic. */ 629 if (bits & LE_T1_EMORE) 630 dev->stats.collisions += 2; 631 632 dev->stats.tx_packets++; 633 } 634 635 j = TX_NEXT(j); 636 } 637 lp->tx_old = j; 638out: 639 if (netif_queue_stopped(dev) && 640 TX_BUFFS_AVAIL > 0) 641 netif_wake_queue(dev); 642 643 spin_unlock(&lp->lock); 644} 645 646static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len) 647{ 648 u16 *p16 = (u16 *) skb->data; 649 u32 *p32; 650 u8 *p8; 651 void __iomem *pbuf = piobuf; 652 653 /* We know here that both src and dest are on a 16bit boundary. */ 654 *p16++ = sbus_readw(pbuf); 655 p32 = (u32 *) p16; 656 pbuf += 2; 657 len -= 2; 658 659 while (len >= 4) { 660 *p32++ = sbus_readl(pbuf); 661 pbuf += 4; 662 len -= 4; 663 } 664 p8 = (u8 *) p32; 665 if (len >= 2) { 666 p16 = (u16 *) p32; 667 *p16++ = sbus_readw(pbuf); 668 pbuf += 2; 669 len -= 2; 670 p8 = (u8 *) p16; 671 } 672 if (len >= 1) 673 *p8 = sbus_readb(pbuf); 674} 675 676static void lance_rx_pio(struct net_device *dev) 677{ 678 struct lance_private *lp = netdev_priv(dev); 679 struct lance_init_block __iomem *ib = lp->init_block_iomem; 680 struct lance_rx_desc __iomem *rd; 681 unsigned char bits; 682 int len, entry; 683 struct sk_buff *skb; 684 685 entry = lp->rx_new; 686 for (rd = &ib->brx_ring [entry]; 687 !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN); 688 rd = &ib->brx_ring [entry]) { 689 690 /* We got an incomplete frame? */ 691 if ((bits & LE_R1_POK) != LE_R1_POK) { 692 dev->stats.rx_over_errors++; 693 dev->stats.rx_errors++; 694 } else if (bits & LE_R1_ERR) { 695 /* Count only the end frame as a rx error, 696 * not the beginning 697 */ 698 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++; 699 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++; 700 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++; 701 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++; 702 if (bits & LE_R1_EOP) dev->stats.rx_errors++; 703 } else { 704 len = (sbus_readw(&rd->mblength) & 0xfff) - 4; 705 skb = netdev_alloc_skb(dev, len + 2); 706 707 if (skb == NULL) { 708 dev->stats.rx_dropped++; 709 sbus_writew(0, &rd->mblength); 710 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits); 711 lp->rx_new = RX_NEXT(entry); 712 return; 713 } 714 715 dev->stats.rx_bytes += len; 716 717 skb_reserve (skb, 2); /* 16 byte align */ 718 skb_put(skb, len); /* make room */ 719 lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len); 720 skb->protocol = eth_type_trans(skb, dev); 721 netif_rx(skb); 722 dev->stats.rx_packets++; 723 } 724 725 /* Return the packet to the pool */ 726 sbus_writew(0, &rd->mblength); 727 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits); 728 entry = RX_NEXT(entry); 729 } 730 731 lp->rx_new = entry; 732} 733 734static void lance_tx_pio(struct net_device *dev) 735{ 736 struct lance_private *lp = netdev_priv(dev); 737 struct lance_init_block __iomem *ib = lp->init_block_iomem; 738 int i, j; 739 740 spin_lock(&lp->lock); 741 742 j = lp->tx_old; 743 for (i = j; i != lp->tx_new; i = j) { 744 struct lance_tx_desc __iomem *td = &ib->btx_ring [i]; 745 u8 bits = sbus_readb(&td->tmd1_bits); 746 747 /* If we hit a packet not owned by us, stop */ 748 if (bits & LE_T1_OWN) 749 break; 750 751 if (bits & LE_T1_ERR) { 752 u16 status = sbus_readw(&td->misc); 753 754 dev->stats.tx_errors++; 755 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++; 756 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++; 757 758 if (status & LE_T3_CLOS) { 759 dev->stats.tx_carrier_errors++; 760 if (lp->auto_select) { 761 lp->tpe = 1 - lp->tpe; 762 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n", 763 dev->name, lp->tpe?"TPE":"AUI"); 764 STOP_LANCE(lp); 765 lp->init_ring(dev); 766 load_csrs(lp); 767 init_restart_lance(lp); 768 goto out; 769 } 770 } 771 772 /* Buffer errors and underflows turn off the 773 * transmitter, restart the adapter. 774 */ 775 if (status & (LE_T3_BUF|LE_T3_UFL)) { 776 dev->stats.tx_fifo_errors++; 777 778 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n", 779 dev->name); 780 STOP_LANCE(lp); 781 lp->init_ring(dev); 782 load_csrs(lp); 783 init_restart_lance(lp); 784 goto out; 785 } 786 } else if ((bits & LE_T1_POK) == LE_T1_POK) { 787 /* 788 * So we don't count the packet more than once. 789 */ 790 sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits); 791 792 /* One collision before packet was sent. */ 793 if (bits & LE_T1_EONE) 794 dev->stats.collisions++; 795 796 /* More than one collision, be optimistic. */ 797 if (bits & LE_T1_EMORE) 798 dev->stats.collisions += 2; 799 800 dev->stats.tx_packets++; 801 } 802 803 j = TX_NEXT(j); 804 } 805 lp->tx_old = j; 806 807 if (netif_queue_stopped(dev) && 808 TX_BUFFS_AVAIL > 0) 809 netif_wake_queue(dev); 810out: 811 spin_unlock(&lp->lock); 812} 813 814static irqreturn_t lance_interrupt(int irq, void *dev_id) 815{ 816 struct net_device *dev = dev_id; 817 struct lance_private *lp = netdev_priv(dev); 818 int csr0; 819 820 sbus_writew(LE_CSR0, lp->lregs + RAP); 821 csr0 = sbus_readw(lp->lregs + RDP); 822 823 /* Acknowledge all the interrupt sources ASAP */ 824 sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT), 825 lp->lregs + RDP); 826 827 if ((csr0 & LE_C0_ERR) != 0) { 828 /* Clear the error condition */ 829 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS | 830 LE_C0_CERR | LE_C0_MERR), 831 lp->lregs + RDP); 832 } 833 834 if (csr0 & LE_C0_RINT) 835 lp->rx(dev); 836 837 if (csr0 & LE_C0_TINT) 838 lp->tx(dev); 839 840 if (csr0 & LE_C0_BABL) 841 dev->stats.tx_errors++; 842 843 if (csr0 & LE_C0_MISS) 844 dev->stats.rx_errors++; 845 846 if (csr0 & LE_C0_MERR) { 847 if (lp->dregs) { 848 u32 addr = sbus_readl(lp->dregs + DMA_ADDR); 849 850 printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n", 851 dev->name, csr0, addr & 0xffffff); 852 } else { 853 printk(KERN_ERR "%s: Memory error, status %04x\n", 854 dev->name, csr0); 855 } 856 857 sbus_writew(LE_C0_STOP, lp->lregs + RDP); 858 859 if (lp->dregs) { 860 u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR); 861 862 dma_csr |= DMA_FIFO_INV; 863 sbus_writel(dma_csr, lp->dregs + DMA_CSR); 864 } 865 866 lp->init_ring(dev); 867 load_csrs(lp); 868 init_restart_lance(lp); 869 netif_wake_queue(dev); 870 } 871 872 sbus_writew(LE_C0_INEA, lp->lregs + RDP); 873 874 return IRQ_HANDLED; 875} 876 877/* Build a fake network packet and send it to ourselves. */ 878static void build_fake_packet(struct lance_private *lp) 879{ 880 struct net_device *dev = lp->dev; 881 int i, entry; 882 883 entry = lp->tx_new & TX_RING_MOD_MASK; 884 if (lp->pio_buffer) { 885 struct lance_init_block __iomem *ib = lp->init_block_iomem; 886 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]); 887 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet; 888 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++) 889 sbus_writew(0, &packet[i]); 890 for (i = 0; i < 6; i++) { 891 sbus_writeb(dev->dev_addr[i], ð->h_dest[i]); 892 sbus_writeb(dev->dev_addr[i], ð->h_source[i]); 893 } 894 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length); 895 sbus_writew(0, &ib->btx_ring[entry].misc); 896 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits); 897 } else { 898 struct lance_init_block *ib = lp->init_block_mem; 899 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]); 900 struct ethhdr *eth = (struct ethhdr *) packet; 901 memset(packet, 0, ETH_ZLEN); 902 for (i = 0; i < 6; i++) { 903 eth->h_dest[i] = dev->dev_addr[i]; 904 eth->h_source[i] = dev->dev_addr[i]; 905 } 906 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000; 907 ib->btx_ring[entry].misc = 0; 908 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN); 909 } 910 lp->tx_new = TX_NEXT(entry); 911} 912 913static int lance_open(struct net_device *dev) 914{ 915 struct lance_private *lp = netdev_priv(dev); 916 int status = 0; 917 918 STOP_LANCE(lp); 919 920 if (request_irq(dev->irq, lance_interrupt, IRQF_SHARED, 921 lancestr, (void *) dev)) { 922 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq); 923 return -EAGAIN; 924 } 925 926 /* On the 4m, setup the ledma to provide the upper bits for buffers */ 927 if (lp->dregs) { 928 u32 regval = lp->init_block_dvma & 0xff000000; 929 930 sbus_writel(regval, lp->dregs + DMA_TEST); 931 } 932 933 /* Set mode and clear multicast filter only at device open, 934 * so that lance_init_ring() called at any error will not 935 * forget multicast filters. 936 * 937 * BTW it is common bug in all lance drivers! --ANK 938 */ 939 if (lp->pio_buffer) { 940 struct lance_init_block __iomem *ib = lp->init_block_iomem; 941 sbus_writew(0, &ib->mode); 942 sbus_writel(0, &ib->filter[0]); 943 sbus_writel(0, &ib->filter[1]); 944 } else { 945 struct lance_init_block *ib = lp->init_block_mem; 946 ib->mode = 0; 947 ib->filter [0] = 0; 948 ib->filter [1] = 0; 949 } 950 951 lp->init_ring(dev); 952 load_csrs(lp); 953 954 netif_start_queue(dev); 955 956 status = init_restart_lance(lp); 957 if (!status && lp->auto_select) { 958 build_fake_packet(lp); 959 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP); 960 } 961 962 return status; 963} 964 965static int lance_close(struct net_device *dev) 966{ 967 struct lance_private *lp = netdev_priv(dev); 968 969 netif_stop_queue(dev); 970 del_timer_sync(&lp->multicast_timer); 971 972 STOP_LANCE(lp); 973 974 free_irq(dev->irq, (void *) dev); 975 return 0; 976} 977 978static int lance_reset(struct net_device *dev) 979{ 980 struct lance_private *lp = netdev_priv(dev); 981 int status; 982 983 STOP_LANCE(lp); 984 985 /* On the 4m, reset the dma too */ 986 if (lp->dregs) { 987 u32 csr, addr; 988 989 printk(KERN_ERR "resetting ledma\n"); 990 csr = sbus_readl(lp->dregs + DMA_CSR); 991 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR); 992 udelay(200); 993 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR); 994 995 addr = lp->init_block_dvma & 0xff000000; 996 sbus_writel(addr, lp->dregs + DMA_TEST); 997 } 998 lp->init_ring(dev); 999 load_csrs(lp); 1000 dev->trans_start = jiffies; /* prevent tx timeout */ 1001 status = init_restart_lance(lp); 1002 return status; 1003} 1004 1005static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len) 1006{ 1007 void __iomem *piobuf = dest; 1008 u32 *p32; 1009 u16 *p16; 1010 u8 *p8; 1011 1012 switch ((unsigned long)src & 0x3) { 1013 case 0: 1014 p32 = (u32 *) src; 1015 while (len >= 4) { 1016 sbus_writel(*p32, piobuf); 1017 p32++; 1018 piobuf += 4; 1019 len -= 4; 1020 } 1021 src = (char *) p32; 1022 break; 1023 case 1: 1024 case 3: 1025 p8 = (u8 *) src; 1026 while (len >= 4) { 1027 u32 val; 1028 1029 val = p8[0] << 24; 1030 val |= p8[1] << 16; 1031 val |= p8[2] << 8; 1032 val |= p8[3]; 1033 sbus_writel(val, piobuf); 1034 p8 += 4; 1035 piobuf += 4; 1036 len -= 4; 1037 } 1038 src = (char *) p8; 1039 break; 1040 case 2: 1041 p16 = (u16 *) src; 1042 while (len >= 4) { 1043 u32 val = p16[0]<<16 | p16[1]; 1044 sbus_writel(val, piobuf); 1045 p16 += 2; 1046 piobuf += 4; 1047 len -= 4; 1048 } 1049 src = (char *) p16; 1050 break; 1051 } 1052 if (len >= 2) { 1053 u16 val = src[0] << 8 | src[1]; 1054 sbus_writew(val, piobuf); 1055 src += 2; 1056 piobuf += 2; 1057 len -= 2; 1058 } 1059 if (len >= 1) 1060 sbus_writeb(src[0], piobuf); 1061} 1062 1063static void lance_piozero(void __iomem *dest, int len) 1064{ 1065 void __iomem *piobuf = dest; 1066 1067 if ((unsigned long)piobuf & 1) { 1068 sbus_writeb(0, piobuf); 1069 piobuf += 1; 1070 len -= 1; 1071 if (len == 0) 1072 return; 1073 } 1074 if (len == 1) { 1075 sbus_writeb(0, piobuf); 1076 return; 1077 } 1078 if ((unsigned long)piobuf & 2) { 1079 sbus_writew(0, piobuf); 1080 piobuf += 2; 1081 len -= 2; 1082 if (len == 0) 1083 return; 1084 } 1085 while (len >= 4) { 1086 sbus_writel(0, piobuf); 1087 piobuf += 4; 1088 len -= 4; 1089 } 1090 if (len >= 2) { 1091 sbus_writew(0, piobuf); 1092 piobuf += 2; 1093 len -= 2; 1094 } 1095 if (len >= 1) 1096 sbus_writeb(0, piobuf); 1097} 1098 1099static void lance_tx_timeout(struct net_device *dev) 1100{ 1101 struct lance_private *lp = netdev_priv(dev); 1102 1103 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n", 1104 dev->name, sbus_readw(lp->lregs + RDP)); 1105 lance_reset(dev); 1106 netif_wake_queue(dev); 1107} 1108 1109static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev) 1110{ 1111 struct lance_private *lp = netdev_priv(dev); 1112 int entry, skblen, len; 1113 1114 skblen = skb->len; 1115 1116 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen; 1117 1118 spin_lock_irq(&lp->lock); 1119 1120 dev->stats.tx_bytes += len; 1121 1122 entry = lp->tx_new & TX_RING_MOD_MASK; 1123 if (lp->pio_buffer) { 1124 struct lance_init_block __iomem *ib = lp->init_block_iomem; 1125 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length); 1126 sbus_writew(0, &ib->btx_ring[entry].misc); 1127 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen); 1128 if (len != skblen) 1129 lance_piozero(&ib->tx_buf[entry][skblen], len - skblen); 1130 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits); 1131 } else { 1132 struct lance_init_block *ib = lp->init_block_mem; 1133 ib->btx_ring [entry].length = (-len) | 0xf000; 1134 ib->btx_ring [entry].misc = 0; 1135 skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen); 1136 if (len != skblen) 1137 memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen); 1138 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN); 1139 } 1140 1141 lp->tx_new = TX_NEXT(entry); 1142 1143 if (TX_BUFFS_AVAIL <= 0) 1144 netif_stop_queue(dev); 1145 1146 /* Kick the lance: transmit now */ 1147 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP); 1148 1149 /* Read back CSR to invalidate the E-Cache. 1150 * This is needed, because DMA_DSBL_WR_INV is set. 1151 */ 1152 if (lp->dregs) 1153 sbus_readw(lp->lregs + RDP); 1154 1155 spin_unlock_irq(&lp->lock); 1156 1157 dev_kfree_skb(skb); 1158 1159 return NETDEV_TX_OK; 1160} 1161 1162/* taken from the depca driver */ 1163static void lance_load_multicast(struct net_device *dev) 1164{ 1165 struct lance_private *lp = netdev_priv(dev); 1166 struct netdev_hw_addr *ha; 1167 u32 crc; 1168 u32 val; 1169 1170 /* set all multicast bits */ 1171 if (dev->flags & IFF_ALLMULTI) 1172 val = ~0; 1173 else 1174 val = 0; 1175 1176 if (lp->pio_buffer) { 1177 struct lance_init_block __iomem *ib = lp->init_block_iomem; 1178 sbus_writel(val, &ib->filter[0]); 1179 sbus_writel(val, &ib->filter[1]); 1180 } else { 1181 struct lance_init_block *ib = lp->init_block_mem; 1182 ib->filter [0] = val; 1183 ib->filter [1] = val; 1184 } 1185 1186 if (dev->flags & IFF_ALLMULTI) 1187 return; 1188 1189 /* Add addresses */ 1190 netdev_for_each_mc_addr(ha, dev) { 1191 crc = ether_crc_le(6, ha->addr); 1192 crc = crc >> 26; 1193 if (lp->pio_buffer) { 1194 struct lance_init_block __iomem *ib = lp->init_block_iomem; 1195 u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter; 1196 u16 tmp = sbus_readw(&mcast_table[crc>>4]); 1197 tmp |= 1 << (crc & 0xf); 1198 sbus_writew(tmp, &mcast_table[crc>>4]); 1199 } else { 1200 struct lance_init_block *ib = lp->init_block_mem; 1201 u16 *mcast_table = (u16 *) &ib->filter; 1202 mcast_table [crc >> 4] |= 1 << (crc & 0xf); 1203 } 1204 } 1205} 1206 1207static void lance_set_multicast(struct net_device *dev) 1208{ 1209 struct lance_private *lp = netdev_priv(dev); 1210 struct lance_init_block *ib_mem = lp->init_block_mem; 1211 struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem; 1212 u16 mode; 1213 1214 if (!netif_running(dev)) 1215 return; 1216 1217 if (lp->tx_old != lp->tx_new) { 1218 mod_timer(&lp->multicast_timer, jiffies + 4); 1219 netif_wake_queue(dev); 1220 return; 1221 } 1222 1223 netif_stop_queue(dev); 1224 1225 STOP_LANCE(lp); 1226 lp->init_ring(dev); 1227 1228 if (lp->pio_buffer) 1229 mode = sbus_readw(&ib_iomem->mode); 1230 else 1231 mode = ib_mem->mode; 1232 if (dev->flags & IFF_PROMISC) { 1233 mode |= LE_MO_PROM; 1234 if (lp->pio_buffer) 1235 sbus_writew(mode, &ib_iomem->mode); 1236 else 1237 ib_mem->mode = mode; 1238 } else { 1239 mode &= ~LE_MO_PROM; 1240 if (lp->pio_buffer) 1241 sbus_writew(mode, &ib_iomem->mode); 1242 else 1243 ib_mem->mode = mode; 1244 lance_load_multicast(dev); 1245 } 1246 load_csrs(lp); 1247 init_restart_lance(lp); 1248 netif_wake_queue(dev); 1249} 1250 1251static void lance_set_multicast_retry(unsigned long _opaque) 1252{ 1253 struct net_device *dev = (struct net_device *) _opaque; 1254 1255 lance_set_multicast(dev); 1256} 1257 1258static void lance_free_hwresources(struct lance_private *lp) 1259{ 1260 if (lp->lregs) 1261 of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE); 1262 if (lp->dregs) { 1263 struct platform_device *ledma = lp->ledma; 1264 1265 of_iounmap(&ledma->resource[0], lp->dregs, 1266 resource_size(&ledma->resource[0])); 1267 } 1268 if (lp->init_block_iomem) { 1269 of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem, 1270 sizeof(struct lance_init_block)); 1271 } else if (lp->init_block_mem) { 1272 dma_free_coherent(&lp->op->dev, 1273 sizeof(struct lance_init_block), 1274 lp->init_block_mem, 1275 lp->init_block_dvma); 1276 } 1277} 1278 1279/* Ethtool support... */ 1280static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 1281{ 1282 strlcpy(info->driver, "sunlance", sizeof(info->driver)); 1283 strlcpy(info->version, "2.02", sizeof(info->version)); 1284} 1285 1286static const struct ethtool_ops sparc_lance_ethtool_ops = { 1287 .get_drvinfo = sparc_lance_get_drvinfo, 1288 .get_link = ethtool_op_get_link, 1289}; 1290 1291static const struct net_device_ops sparc_lance_ops = { 1292 .ndo_open = lance_open, 1293 .ndo_stop = lance_close, 1294 .ndo_start_xmit = lance_start_xmit, 1295 .ndo_set_rx_mode = lance_set_multicast, 1296 .ndo_tx_timeout = lance_tx_timeout, 1297 .ndo_change_mtu = eth_change_mtu, 1298 .ndo_set_mac_address = eth_mac_addr, 1299 .ndo_validate_addr = eth_validate_addr, 1300}; 1301 1302static int sparc_lance_probe_one(struct platform_device *op, 1303 struct platform_device *ledma, 1304 struct platform_device *lebuffer) 1305{ 1306 struct device_node *dp = op->dev.of_node; 1307 static unsigned version_printed; 1308 struct lance_private *lp; 1309 struct net_device *dev; 1310 int i; 1311 1312 dev = alloc_etherdev(sizeof(struct lance_private) + 8); 1313 if (!dev) 1314 return -ENOMEM; 1315 1316 lp = netdev_priv(dev); 1317 1318 if (sparc_lance_debug && version_printed++ == 0) 1319 printk (KERN_INFO "%s", version); 1320 1321 spin_lock_init(&lp->lock); 1322 1323 /* Copy the IDPROM ethernet address to the device structure, later we 1324 * will copy the address in the device structure to the lance 1325 * initialization block. 1326 */ 1327 for (i = 0; i < 6; i++) 1328 dev->dev_addr[i] = idprom->id_ethaddr[i]; 1329 1330 /* Get the IO region */ 1331 lp->lregs = of_ioremap(&op->resource[0], 0, 1332 LANCE_REG_SIZE, lancestr); 1333 if (!lp->lregs) { 1334 printk(KERN_ERR "SunLance: Cannot map registers.\n"); 1335 goto fail; 1336 } 1337 1338 lp->ledma = ledma; 1339 if (lp->ledma) { 1340 lp->dregs = of_ioremap(&ledma->resource[0], 0, 1341 resource_size(&ledma->resource[0]), 1342 "ledma"); 1343 if (!lp->dregs) { 1344 printk(KERN_ERR "SunLance: Cannot map " 1345 "ledma registers.\n"); 1346 goto fail; 1347 } 1348 } 1349 1350 lp->op = op; 1351 lp->lebuffer = lebuffer; 1352 if (lebuffer) { 1353 /* sanity check */ 1354 if (lebuffer->resource[0].start & 7) { 1355 printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n"); 1356 goto fail; 1357 } 1358 lp->init_block_iomem = 1359 of_ioremap(&lebuffer->resource[0], 0, 1360 sizeof(struct lance_init_block), "lebuffer"); 1361 if (!lp->init_block_iomem) { 1362 printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n"); 1363 goto fail; 1364 } 1365 lp->init_block_dvma = 0; 1366 lp->pio_buffer = 1; 1367 lp->init_ring = lance_init_ring_pio; 1368 lp->rx = lance_rx_pio; 1369 lp->tx = lance_tx_pio; 1370 } else { 1371 lp->init_block_mem = 1372 dma_alloc_coherent(&op->dev, 1373 sizeof(struct lance_init_block), 1374 &lp->init_block_dvma, GFP_ATOMIC); 1375 if (!lp->init_block_mem) 1376 goto fail; 1377 1378 lp->pio_buffer = 0; 1379 lp->init_ring = lance_init_ring_dvma; 1380 lp->rx = lance_rx_dvma; 1381 lp->tx = lance_tx_dvma; 1382 } 1383 lp->busmaster_regval = of_getintprop_default(dp, "busmaster-regval", 1384 (LE_C3_BSWP | 1385 LE_C3_ACON | 1386 LE_C3_BCON)); 1387 1388 lp->name = lancestr; 1389 1390 lp->burst_sizes = 0; 1391 if (lp->ledma) { 1392 struct device_node *ledma_dp = ledma->dev.of_node; 1393 struct device_node *sbus_dp; 1394 unsigned int sbmask; 1395 const char *prop; 1396 u32 csr; 1397 1398 /* Find burst-size property for ledma */ 1399 lp->burst_sizes = of_getintprop_default(ledma_dp, 1400 "burst-sizes", 0); 1401 1402 /* ledma may be capable of fast bursts, but sbus may not. */ 1403 sbus_dp = ledma_dp->parent; 1404 sbmask = of_getintprop_default(sbus_dp, "burst-sizes", 1405 DMA_BURSTBITS); 1406 lp->burst_sizes &= sbmask; 1407 1408 /* Get the cable-selection property */ 1409 prop = of_get_property(ledma_dp, "cable-selection", NULL); 1410 if (!prop || prop[0] == '\0') { 1411 struct device_node *nd; 1412 1413 printk(KERN_INFO "SunLance: using " 1414 "auto-carrier-detection.\n"); 1415 1416 nd = of_find_node_by_path("/options"); 1417 if (!nd) 1418 goto no_link_test; 1419 1420 prop = of_get_property(nd, "tpe-link-test?", NULL); 1421 if (!prop) 1422 goto no_link_test; 1423 1424 if (strcmp(prop, "true")) { 1425 printk(KERN_NOTICE "SunLance: warning: overriding option " 1426 "'tpe-link-test?'\n"); 1427 printk(KERN_NOTICE "SunLance: warning: mail any problems " 1428 "to ecd@skynet.be\n"); 1429 auxio_set_lte(AUXIO_LTE_ON); 1430 } 1431no_link_test: 1432 lp->auto_select = 1; 1433 lp->tpe = 0; 1434 } else if (!strcmp(prop, "aui")) { 1435 lp->auto_select = 0; 1436 lp->tpe = 0; 1437 } else { 1438 lp->auto_select = 0; 1439 lp->tpe = 1; 1440 } 1441 1442 /* Reset ledma */ 1443 csr = sbus_readl(lp->dregs + DMA_CSR); 1444 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR); 1445 udelay(200); 1446 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR); 1447 } else 1448 lp->dregs = NULL; 1449 1450 lp->dev = dev; 1451 SET_NETDEV_DEV(dev, &op->dev); 1452 dev->watchdog_timeo = 5*HZ; 1453 dev->ethtool_ops = &sparc_lance_ethtool_ops; 1454 dev->netdev_ops = &sparc_lance_ops; 1455 1456 dev->irq = op->archdata.irqs[0]; 1457 1458 /* We cannot sleep if the chip is busy during a 1459 * multicast list update event, because such events 1460 * can occur from interrupts (ex. IPv6). So we 1461 * use a timer to try again later when necessary. -DaveM 1462 */ 1463 init_timer(&lp->multicast_timer); 1464 lp->multicast_timer.data = (unsigned long) dev; 1465 lp->multicast_timer.function = lance_set_multicast_retry; 1466 1467 if (register_netdev(dev)) { 1468 printk(KERN_ERR "SunLance: Cannot register device.\n"); 1469 goto fail; 1470 } 1471 1472 platform_set_drvdata(op, lp); 1473 1474 printk(KERN_INFO "%s: LANCE %pM\n", 1475 dev->name, dev->dev_addr); 1476 1477 return 0; 1478 1479fail: 1480 lance_free_hwresources(lp); 1481 free_netdev(dev); 1482 return -ENODEV; 1483} 1484 1485static int sunlance_sbus_probe(struct platform_device *op) 1486{ 1487 struct platform_device *parent = to_platform_device(op->dev.parent); 1488 struct device_node *parent_dp = parent->dev.of_node; 1489 int err; 1490 1491 if (!strcmp(parent_dp->name, "ledma")) { 1492 err = sparc_lance_probe_one(op, parent, NULL); 1493 } else if (!strcmp(parent_dp->name, "lebuffer")) { 1494 err = sparc_lance_probe_one(op, NULL, parent); 1495 } else 1496 err = sparc_lance_probe_one(op, NULL, NULL); 1497 1498 return err; 1499} 1500 1501static int sunlance_sbus_remove(struct platform_device *op) 1502{ 1503 struct lance_private *lp = platform_get_drvdata(op); 1504 struct net_device *net_dev = lp->dev; 1505 1506 unregister_netdev(net_dev); 1507 1508 lance_free_hwresources(lp); 1509 1510 free_netdev(net_dev); 1511 1512 return 0; 1513} 1514 1515static const struct of_device_id sunlance_sbus_match[] = { 1516 { 1517 .name = "le", 1518 }, 1519 {}, 1520}; 1521 1522MODULE_DEVICE_TABLE(of, sunlance_sbus_match); 1523 1524static struct platform_driver sunlance_sbus_driver = { 1525 .driver = { 1526 .name = "sunlance", 1527 .owner = THIS_MODULE, 1528 .of_match_table = sunlance_sbus_match, 1529 }, 1530 .probe = sunlance_sbus_probe, 1531 .remove = sunlance_sbus_remove, 1532}; 1533 1534module_platform_driver(sunlance_sbus_driver); 1535