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1// SPDX-License-Identifier: GPL-2.0-only2/* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $3 * lance.c: Linux/Sparc/Lance driver4 *5 * Written 1995, 1996 by Miguel de Icaza6 * Sources:7 * The Linux depca driver8 * The Linux lance driver.9 * The Linux skeleton driver.10 * The NetBSD Sparc/Lance driver.11 * Theo de Raadt (deraadt@openbsd.org)12 * NCR92C990 Lan Controller manual13 *14 * 1.4:15 * Added support to run with a ledma on the Sun4m16 *17 * 1.5:18 * Added multiple card detection.19 *20 * 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost21 * (ecd@skynet.be)22 *23 * 5/15/96: auto carrier detection on sun4m by Eddie C. Dost24 * (ecd@skynet.be)25 *26 * 5/17/96: lebuffer on scsi/ether cards now work David S. Miller27 * (davem@caip.rutgers.edu)28 *29 * 5/29/96: override option 'tpe-link-test?', if it is 'false', as30 * this disables auto carrier detection on sun4m. Eddie C. Dost31 * (ecd@skynet.be)32 *33 * 1.7:34 * 6/26/96: Bug fix for multiple ledmas, miguel.35 *36 * 1.8:37 * Stole multicast code from depca.c, fixed lance_tx.38 *39 * 1.9:40 * 8/21/96: Fixed the multicast code (Pedro Roque)41 *42 * 8/28/96: Send fake packet in lance_open() if auto_select is true,43 * so we can detect the carrier loss condition in time.44 * Eddie C. Dost (ecd@skynet.be)45 *46 * 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an47 * MNA trap during chksum_partial_copy(). (ecd@skynet.be)48 *49 * 11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)50 *51 * 12/22/96: Don't loop forever in lance_rx() on incomplete packets.52 * This was the sun4c killer. Shit, stupid bug.53 * (ecd@skynet.be)54 *55 * 1.10:56 * 1/26/97: Modularize driver. (ecd@skynet.be)57 *58 * 1.11:59 * 12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)60 *61 * 1.12:62 * 11/3/99: Fixed SMP race in lance_start_xmit found by davem.63 * Anton Blanchard (anton@progsoc.uts.edu.au)64 * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.65 * David S. Miller (davem@redhat.com)66 * 2.01:67 * 11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)68 *69 */70 71#undef DEBUG_DRIVER72 73static char lancestr[] = "LANCE";74 75#include <linux/module.h>76#include <linux/kernel.h>77#include <linux/types.h>78#include <linux/fcntl.h>79#include <linux/interrupt.h>80#include <linux/ioport.h>81#include <linux/in.h>82#include <linux/string.h>83#include <linux/delay.h>84#include <linux/crc32.h>85#include <linux/errno.h>86#include <linux/socket.h> /* Used for the temporal inet entries and routing */87#include <linux/route.h>88#include <linux/netdevice.h>89#include <linux/etherdevice.h>90#include <linux/skbuff.h>91#include <linux/ethtool.h>92#include <linux/bitops.h>93#include <linux/dma-mapping.h>94#include <linux/of.h>95#include <linux/platform_device.h>96#include <linux/gfp.h>97#include <linux/pgtable.h>98 99#include <asm/io.h>100#include <asm/dma.h>101#include <asm/byteorder.h> /* Used by the checksum routines */102#include <asm/idprom.h>103#include <asm/prom.h>104#include <asm/auxio.h> /* For tpe-link-test? setting */105#include <asm/irq.h>106 107#define DRV_NAME "sunlance"108#define DRV_RELDATE "8/24/03"109#define DRV_AUTHOR "Miguel de Icaza (miguel@nuclecu.unam.mx)"110 111MODULE_AUTHOR(DRV_AUTHOR);112MODULE_DESCRIPTION("Sun Lance ethernet driver");113MODULE_LICENSE("GPL");114 115/* Define: 2^4 Tx buffers and 2^4 Rx buffers */116#ifndef LANCE_LOG_TX_BUFFERS117#define LANCE_LOG_TX_BUFFERS 4118#define LANCE_LOG_RX_BUFFERS 4119#endif120 121#define LE_CSR0 0122#define LE_CSR1 1123#define LE_CSR2 2124#define LE_CSR3 3125 126#define LE_MO_PROM 0x8000 /* Enable promiscuous mode */127 128#define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */129#define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */130#define LE_C0_CERR 0x2000 /* SQE: Signal quality error */131#define LE_C0_MISS 0x1000 /* MISS: Missed a packet */132#define LE_C0_MERR 0x0800 /* ME: Memory error */133#define LE_C0_RINT 0x0400 /* Received interrupt */134#define LE_C0_TINT 0x0200 /* Transmitter Interrupt */135#define LE_C0_IDON 0x0100 /* IFIN: Init finished. */136#define LE_C0_INTR 0x0080 /* Interrupt or error */137#define LE_C0_INEA 0x0040 /* Interrupt enable */138#define LE_C0_RXON 0x0020 /* Receiver on */139#define LE_C0_TXON 0x0010 /* Transmitter on */140#define LE_C0_TDMD 0x0008 /* Transmitter demand */141#define LE_C0_STOP 0x0004 /* Stop the card */142#define LE_C0_STRT 0x0002 /* Start the card */143#define LE_C0_INIT 0x0001 /* Init the card */144 145#define LE_C3_BSWP 0x4 /* SWAP */146#define LE_C3_ACON 0x2 /* ALE Control */147#define LE_C3_BCON 0x1 /* Byte control */148 149/* Receive message descriptor 1 */150#define LE_R1_OWN 0x80 /* Who owns the entry */151#define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */152#define LE_R1_FRA 0x20 /* FRA: Frame error */153#define LE_R1_OFL 0x10 /* OFL: Frame overflow */154#define LE_R1_CRC 0x08 /* CRC error */155#define LE_R1_BUF 0x04 /* BUF: Buffer error */156#define LE_R1_SOP 0x02 /* Start of packet */157#define LE_R1_EOP 0x01 /* End of packet */158#define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */159 160#define LE_T1_OWN 0x80 /* Lance owns the packet */161#define LE_T1_ERR 0x40 /* Error summary */162#define LE_T1_EMORE 0x10 /* Error: more than one retry needed */163#define LE_T1_EONE 0x08 /* Error: one retry needed */164#define LE_T1_EDEF 0x04 /* Error: deferred */165#define LE_T1_SOP 0x02 /* Start of packet */166#define LE_T1_EOP 0x01 /* End of packet */167#define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */168 169#define LE_T3_BUF 0x8000 /* Buffer error */170#define LE_T3_UFL 0x4000 /* Error underflow */171#define LE_T3_LCOL 0x1000 /* Error late collision */172#define LE_T3_CLOS 0x0800 /* Error carrier loss */173#define LE_T3_RTY 0x0400 /* Error retry */174#define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */175 176#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))177#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)178#define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)179#define TX_NEXT(__x) (((__x)+1) & TX_RING_MOD_MASK)180 181#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))182#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)183#define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)184#define RX_NEXT(__x) (((__x)+1) & RX_RING_MOD_MASK)185 186#define PKT_BUF_SZ 1544187#define RX_BUFF_SIZE PKT_BUF_SZ188#define TX_BUFF_SIZE PKT_BUF_SZ189 190struct lance_rx_desc {191 u16 rmd0; /* low address of packet */192 u8 rmd1_bits; /* descriptor bits */193 u8 rmd1_hadr; /* high address of packet */194 s16 length; /* This length is 2s complement (negative)!195 * Buffer length196 */197 u16 mblength; /* This is the actual number of bytes received */198};199 200struct lance_tx_desc {201 u16 tmd0; /* low address of packet */202 u8 tmd1_bits; /* descriptor bits */203 u8 tmd1_hadr; /* high address of packet */204 s16 length; /* Length is 2s complement (negative)! */205 u16 misc;206};207 208/* The LANCE initialization block, described in databook. */209/* On the Sparc, this block should be on a DMA region */210struct lance_init_block {211 u16 mode; /* Pre-set mode (reg. 15) */212 u8 phys_addr[6]; /* Physical ethernet address */213 u32 filter[2]; /* Multicast filter. */214 215 /* Receive and transmit ring base, along with extra bits. */216 u16 rx_ptr; /* receive descriptor addr */217 u16 rx_len; /* receive len and high addr */218 u16 tx_ptr; /* transmit descriptor addr */219 u16 tx_len; /* transmit len and high addr */220 221 /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */222 struct lance_rx_desc brx_ring[RX_RING_SIZE];223 struct lance_tx_desc btx_ring[TX_RING_SIZE];224 225 u8 tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];226 u8 pad[2]; /* align rx_buf for copy_and_sum(). */227 u8 rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];228};229 230#define libdesc_offset(rt, elem) \231((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))232 233#define libbuff_offset(rt, elem) \234((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))235 236struct lance_private {237 void __iomem *lregs; /* Lance RAP/RDP regs. */238 void __iomem *dregs; /* DMA controller regs. */239 struct lance_init_block __iomem *init_block_iomem;240 struct lance_init_block *init_block_mem;241 242 spinlock_t lock;243 244 int rx_new, tx_new;245 int rx_old, tx_old;246 247 struct platform_device *ledma; /* If set this points to ledma */248 char tpe; /* cable-selection is TPE */249 char auto_select; /* cable-selection by carrier */250 char burst_sizes; /* ledma SBus burst sizes */251 char pio_buffer; /* init block in PIO space? */252 253 unsigned short busmaster_regval;254 255 void (*init_ring)(struct net_device *);256 void (*rx)(struct net_device *);257 void (*tx)(struct net_device *);258 259 char *name;260 dma_addr_t init_block_dvma;261 struct net_device *dev; /* Backpointer */262 struct platform_device *op;263 struct platform_device *lebuffer;264 struct timer_list multicast_timer;265};266 267#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\268 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\269 lp->tx_old - lp->tx_new-1)270 271/* Lance registers. */272#define RDP 0x00UL /* register data port */273#define RAP 0x02UL /* register address port */274#define LANCE_REG_SIZE 0x04UL275 276#define STOP_LANCE(__lp) \277do { void __iomem *__base = (__lp)->lregs; \278 sbus_writew(LE_CSR0, __base + RAP); \279 sbus_writew(LE_C0_STOP, __base + RDP); \280} while (0)281 282int sparc_lance_debug = 2;283 284/* The Lance uses 24 bit addresses */285/* On the Sun4c the DVMA will provide the remaining bytes for us */286/* On the Sun4m we have to instruct the ledma to provide them */287/* Even worse, on scsi/ether SBUS cards, the init block and the288 * transmit/receive buffers are addresses as offsets from absolute289 * zero on the lebuffer PIO area. -DaveM290 */291 292#define LANCE_ADDR(x) ((long)(x) & ~0xff000000)293 294/* Load the CSR registers */295static void load_csrs(struct lance_private *lp)296{297 u32 leptr;298 299 if (lp->pio_buffer)300 leptr = 0;301 else302 leptr = LANCE_ADDR(lp->init_block_dvma);303 304 sbus_writew(LE_CSR1, lp->lregs + RAP);305 sbus_writew(leptr & 0xffff, lp->lregs + RDP);306 sbus_writew(LE_CSR2, lp->lregs + RAP);307 sbus_writew(leptr >> 16, lp->lregs + RDP);308 sbus_writew(LE_CSR3, lp->lregs + RAP);309 sbus_writew(lp->busmaster_regval, lp->lregs + RDP);310 311 /* Point back to csr0 */312 sbus_writew(LE_CSR0, lp->lregs + RAP);313}314 315/* Setup the Lance Rx and Tx rings */316static void lance_init_ring_dvma(struct net_device *dev)317{318 struct lance_private *lp = netdev_priv(dev);319 struct lance_init_block *ib = lp->init_block_mem;320 dma_addr_t aib = lp->init_block_dvma;321 __u32 leptr;322 int i;323 324 /* Lock out other processes while setting up hardware */325 netif_stop_queue(dev);326 lp->rx_new = lp->tx_new = 0;327 lp->rx_old = lp->tx_old = 0;328 329 /* Copy the ethernet address to the lance init block330 * Note that on the sparc you need to swap the ethernet address.331 */332 ib->phys_addr [0] = dev->dev_addr [1];333 ib->phys_addr [1] = dev->dev_addr [0];334 ib->phys_addr [2] = dev->dev_addr [3];335 ib->phys_addr [3] = dev->dev_addr [2];336 ib->phys_addr [4] = dev->dev_addr [5];337 ib->phys_addr [5] = dev->dev_addr [4];338 339 /* Setup the Tx ring entries */340 for (i = 0; i < TX_RING_SIZE; i++) {341 leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));342 ib->btx_ring [i].tmd0 = leptr;343 ib->btx_ring [i].tmd1_hadr = leptr >> 16;344 ib->btx_ring [i].tmd1_bits = 0;345 ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */346 ib->btx_ring [i].misc = 0;347 }348 349 /* Setup the Rx ring entries */350 for (i = 0; i < RX_RING_SIZE; i++) {351 leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));352 353 ib->brx_ring [i].rmd0 = leptr;354 ib->brx_ring [i].rmd1_hadr = leptr >> 16;355 ib->brx_ring [i].rmd1_bits = LE_R1_OWN;356 ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000;357 ib->brx_ring [i].mblength = 0;358 }359 360 /* Setup the initialization block */361 362 /* Setup rx descriptor pointer */363 leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));364 ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);365 ib->rx_ptr = leptr;366 367 /* Setup tx descriptor pointer */368 leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));369 ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);370 ib->tx_ptr = leptr;371}372 373static void lance_init_ring_pio(struct net_device *dev)374{375 struct lance_private *lp = netdev_priv(dev);376 struct lance_init_block __iomem *ib = lp->init_block_iomem;377 u32 leptr;378 int i;379 380 /* Lock out other processes while setting up hardware */381 netif_stop_queue(dev);382 lp->rx_new = lp->tx_new = 0;383 lp->rx_old = lp->tx_old = 0;384 385 /* Copy the ethernet address to the lance init block386 * Note that on the sparc you need to swap the ethernet address.387 */388 sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);389 sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);390 sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);391 sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);392 sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);393 sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);394 395 /* Setup the Tx ring entries */396 for (i = 0; i < TX_RING_SIZE; i++) {397 leptr = libbuff_offset(tx_buf, i);398 sbus_writew(leptr, &ib->btx_ring [i].tmd0);399 sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);400 sbus_writeb(0, &ib->btx_ring [i].tmd1_bits);401 402 /* The ones required by tmd2 */403 sbus_writew(0xf000, &ib->btx_ring [i].length);404 sbus_writew(0, &ib->btx_ring [i].misc);405 }406 407 /* Setup the Rx ring entries */408 for (i = 0; i < RX_RING_SIZE; i++) {409 leptr = libbuff_offset(rx_buf, i);410 411 sbus_writew(leptr, &ib->brx_ring [i].rmd0);412 sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);413 sbus_writeb(LE_R1_OWN, &ib->brx_ring [i].rmd1_bits);414 sbus_writew(-RX_BUFF_SIZE|0xf000,415 &ib->brx_ring [i].length);416 sbus_writew(0, &ib->brx_ring [i].mblength);417 }418 419 /* Setup the initialization block */420 421 /* Setup rx descriptor pointer */422 leptr = libdesc_offset(brx_ring, 0);423 sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),424 &ib->rx_len);425 sbus_writew(leptr, &ib->rx_ptr);426 427 /* Setup tx descriptor pointer */428 leptr = libdesc_offset(btx_ring, 0);429 sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),430 &ib->tx_len);431 sbus_writew(leptr, &ib->tx_ptr);432}433 434static void init_restart_ledma(struct lance_private *lp)435{436 u32 csr = sbus_readl(lp->dregs + DMA_CSR);437 438 if (!(csr & DMA_HNDL_ERROR)) {439 /* E-Cache draining */440 while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)441 barrier();442 }443 444 csr = sbus_readl(lp->dregs + DMA_CSR);445 csr &= ~DMA_E_BURSTS;446 if (lp->burst_sizes & DMA_BURST32)447 csr |= DMA_E_BURST32;448 else449 csr |= DMA_E_BURST16;450 451 csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);452 453 if (lp->tpe)454 csr |= DMA_EN_ENETAUI;455 else456 csr &= ~DMA_EN_ENETAUI;457 udelay(20);458 sbus_writel(csr, lp->dregs + DMA_CSR);459 udelay(200);460}461 462static int init_restart_lance(struct lance_private *lp)463{464 u16 regval = 0;465 int i;466 467 if (lp->dregs)468 init_restart_ledma(lp);469 470 sbus_writew(LE_CSR0, lp->lregs + RAP);471 sbus_writew(LE_C0_INIT, lp->lregs + RDP);472 473 /* Wait for the lance to complete initialization */474 for (i = 0; i < 100; i++) {475 regval = sbus_readw(lp->lregs + RDP);476 477 if (regval & (LE_C0_ERR | LE_C0_IDON))478 break;479 barrier();480 }481 if (i == 100 || (regval & LE_C0_ERR)) {482 printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",483 i, regval);484 if (lp->dregs)485 printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));486 return -1;487 }488 489 /* Clear IDON by writing a "1", enable interrupts and start lance */490 sbus_writew(LE_C0_IDON, lp->lregs + RDP);491 sbus_writew(LE_C0_INEA | LE_C0_STRT, lp->lregs + RDP);492 493 if (lp->dregs) {494 u32 csr = sbus_readl(lp->dregs + DMA_CSR);495 496 csr |= DMA_INT_ENAB;497 sbus_writel(csr, lp->dregs + DMA_CSR);498 }499 500 return 0;501}502 503static void lance_rx_dvma(struct net_device *dev)504{505 struct lance_private *lp = netdev_priv(dev);506 struct lance_init_block *ib = lp->init_block_mem;507 struct lance_rx_desc *rd;508 u8 bits;509 int len, entry = lp->rx_new;510 struct sk_buff *skb;511 512 for (rd = &ib->brx_ring [entry];513 !((bits = rd->rmd1_bits) & LE_R1_OWN);514 rd = &ib->brx_ring [entry]) {515 516 /* We got an incomplete frame? */517 if ((bits & LE_R1_POK) != LE_R1_POK) {518 dev->stats.rx_over_errors++;519 dev->stats.rx_errors++;520 } else if (bits & LE_R1_ERR) {521 /* Count only the end frame as a rx error,522 * not the beginning523 */524 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;525 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;526 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;527 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;528 if (bits & LE_R1_EOP) dev->stats.rx_errors++;529 } else {530 len = (rd->mblength & 0xfff) - 4;531 skb = netdev_alloc_skb(dev, len + 2);532 533 if (!skb) {534 dev->stats.rx_dropped++;535 rd->mblength = 0;536 rd->rmd1_bits = LE_R1_OWN;537 lp->rx_new = RX_NEXT(entry);538 return;539 }540 541 dev->stats.rx_bytes += len;542 543 skb_reserve(skb, 2); /* 16 byte align */544 skb_put(skb, len); /* make room */545 skb_copy_to_linear_data(skb,546 (unsigned char *)&(ib->rx_buf [entry][0]),547 len);548 skb->protocol = eth_type_trans(skb, dev);549 netif_rx(skb);550 dev->stats.rx_packets++;551 }552 553 /* Return the packet to the pool */554 rd->mblength = 0;555 rd->rmd1_bits = LE_R1_OWN;556 entry = RX_NEXT(entry);557 }558 559 lp->rx_new = entry;560}561 562static void lance_tx_dvma(struct net_device *dev)563{564 struct lance_private *lp = netdev_priv(dev);565 struct lance_init_block *ib = lp->init_block_mem;566 int i, j;567 568 spin_lock(&lp->lock);569 570 j = lp->tx_old;571 for (i = j; i != lp->tx_new; i = j) {572 struct lance_tx_desc *td = &ib->btx_ring [i];573 u8 bits = td->tmd1_bits;574 575 /* If we hit a packet not owned by us, stop */576 if (bits & LE_T1_OWN)577 break;578 579 if (bits & LE_T1_ERR) {580 u16 status = td->misc;581 582 dev->stats.tx_errors++;583 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;584 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;585 586 if (status & LE_T3_CLOS) {587 dev->stats.tx_carrier_errors++;588 if (lp->auto_select) {589 lp->tpe = 1 - lp->tpe;590 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",591 dev->name, lp->tpe?"TPE":"AUI");592 STOP_LANCE(lp);593 lp->init_ring(dev);594 load_csrs(lp);595 init_restart_lance(lp);596 goto out;597 }598 }599 600 /* Buffer errors and underflows turn off the601 * transmitter, restart the adapter.602 */603 if (status & (LE_T3_BUF|LE_T3_UFL)) {604 dev->stats.tx_fifo_errors++;605 606 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",607 dev->name);608 STOP_LANCE(lp);609 lp->init_ring(dev);610 load_csrs(lp);611 init_restart_lance(lp);612 goto out;613 }614 } else if ((bits & LE_T1_POK) == LE_T1_POK) {615 /*616 * So we don't count the packet more than once.617 */618 td->tmd1_bits = bits & ~(LE_T1_POK);619 620 /* One collision before packet was sent. */621 if (bits & LE_T1_EONE)622 dev->stats.collisions++;623 624 /* More than one collision, be optimistic. */625 if (bits & LE_T1_EMORE)626 dev->stats.collisions += 2;627 628 dev->stats.tx_packets++;629 }630 631 j = TX_NEXT(j);632 }633 lp->tx_old = j;634out:635 if (netif_queue_stopped(dev) &&636 TX_BUFFS_AVAIL > 0)637 netif_wake_queue(dev);638 639 spin_unlock(&lp->lock);640}641 642static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)643{644 u16 *p16 = (u16 *) skb->data;645 u32 *p32;646 u8 *p8;647 void __iomem *pbuf = piobuf;648 649 /* We know here that both src and dest are on a 16bit boundary. */650 *p16++ = sbus_readw(pbuf);651 p32 = (u32 *) p16;652 pbuf += 2;653 len -= 2;654 655 while (len >= 4) {656 *p32++ = sbus_readl(pbuf);657 pbuf += 4;658 len -= 4;659 }660 p8 = (u8 *) p32;661 if (len >= 2) {662 p16 = (u16 *) p32;663 *p16++ = sbus_readw(pbuf);664 pbuf += 2;665 len -= 2;666 p8 = (u8 *) p16;667 }668 if (len >= 1)669 *p8 = sbus_readb(pbuf);670}671 672static void lance_rx_pio(struct net_device *dev)673{674 struct lance_private *lp = netdev_priv(dev);675 struct lance_init_block __iomem *ib = lp->init_block_iomem;676 struct lance_rx_desc __iomem *rd;677 unsigned char bits;678 int len, entry;679 struct sk_buff *skb;680 681 entry = lp->rx_new;682 for (rd = &ib->brx_ring [entry];683 !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);684 rd = &ib->brx_ring [entry]) {685 686 /* We got an incomplete frame? */687 if ((bits & LE_R1_POK) != LE_R1_POK) {688 dev->stats.rx_over_errors++;689 dev->stats.rx_errors++;690 } else if (bits & LE_R1_ERR) {691 /* Count only the end frame as a rx error,692 * not the beginning693 */694 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;695 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;696 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;697 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;698 if (bits & LE_R1_EOP) dev->stats.rx_errors++;699 } else {700 len = (sbus_readw(&rd->mblength) & 0xfff) - 4;701 skb = netdev_alloc_skb(dev, len + 2);702 703 if (!skb) {704 dev->stats.rx_dropped++;705 sbus_writew(0, &rd->mblength);706 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);707 lp->rx_new = RX_NEXT(entry);708 return;709 }710 711 dev->stats.rx_bytes += len;712 713 skb_reserve (skb, 2); /* 16 byte align */714 skb_put(skb, len); /* make room */715 lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);716 skb->protocol = eth_type_trans(skb, dev);717 netif_rx(skb);718 dev->stats.rx_packets++;719 }720 721 /* Return the packet to the pool */722 sbus_writew(0, &rd->mblength);723 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);724 entry = RX_NEXT(entry);725 }726 727 lp->rx_new = entry;728}729 730static void lance_tx_pio(struct net_device *dev)731{732 struct lance_private *lp = netdev_priv(dev);733 struct lance_init_block __iomem *ib = lp->init_block_iomem;734 int i, j;735 736 spin_lock(&lp->lock);737 738 j = lp->tx_old;739 for (i = j; i != lp->tx_new; i = j) {740 struct lance_tx_desc __iomem *td = &ib->btx_ring [i];741 u8 bits = sbus_readb(&td->tmd1_bits);742 743 /* If we hit a packet not owned by us, stop */744 if (bits & LE_T1_OWN)745 break;746 747 if (bits & LE_T1_ERR) {748 u16 status = sbus_readw(&td->misc);749 750 dev->stats.tx_errors++;751 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;752 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;753 754 if (status & LE_T3_CLOS) {755 dev->stats.tx_carrier_errors++;756 if (lp->auto_select) {757 lp->tpe = 1 - lp->tpe;758 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",759 dev->name, lp->tpe?"TPE":"AUI");760 STOP_LANCE(lp);761 lp->init_ring(dev);762 load_csrs(lp);763 init_restart_lance(lp);764 goto out;765 }766 }767 768 /* Buffer errors and underflows turn off the769 * transmitter, restart the adapter.770 */771 if (status & (LE_T3_BUF|LE_T3_UFL)) {772 dev->stats.tx_fifo_errors++;773 774 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",775 dev->name);776 STOP_LANCE(lp);777 lp->init_ring(dev);778 load_csrs(lp);779 init_restart_lance(lp);780 goto out;781 }782 } else if ((bits & LE_T1_POK) == LE_T1_POK) {783 /*784 * So we don't count the packet more than once.785 */786 sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);787 788 /* One collision before packet was sent. */789 if (bits & LE_T1_EONE)790 dev->stats.collisions++;791 792 /* More than one collision, be optimistic. */793 if (bits & LE_T1_EMORE)794 dev->stats.collisions += 2;795 796 dev->stats.tx_packets++;797 }798 799 j = TX_NEXT(j);800 }801 lp->tx_old = j;802 803 if (netif_queue_stopped(dev) &&804 TX_BUFFS_AVAIL > 0)805 netif_wake_queue(dev);806out:807 spin_unlock(&lp->lock);808}809 810static irqreturn_t lance_interrupt(int irq, void *dev_id)811{812 struct net_device *dev = dev_id;813 struct lance_private *lp = netdev_priv(dev);814 int csr0;815 816 sbus_writew(LE_CSR0, lp->lregs + RAP);817 csr0 = sbus_readw(lp->lregs + RDP);818 819 /* Acknowledge all the interrupt sources ASAP */820 sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),821 lp->lregs + RDP);822 823 if ((csr0 & LE_C0_ERR) != 0) {824 /* Clear the error condition */825 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |826 LE_C0_CERR | LE_C0_MERR),827 lp->lregs + RDP);828 }829 830 if (csr0 & LE_C0_RINT)831 lp->rx(dev);832 833 if (csr0 & LE_C0_TINT)834 lp->tx(dev);835 836 if (csr0 & LE_C0_BABL)837 dev->stats.tx_errors++;838 839 if (csr0 & LE_C0_MISS)840 dev->stats.rx_errors++;841 842 if (csr0 & LE_C0_MERR) {843 if (lp->dregs) {844 u32 addr = sbus_readl(lp->dregs + DMA_ADDR);845 846 printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",847 dev->name, csr0, addr & 0xffffff);848 } else {849 printk(KERN_ERR "%s: Memory error, status %04x\n",850 dev->name, csr0);851 }852 853 sbus_writew(LE_C0_STOP, lp->lregs + RDP);854 855 if (lp->dregs) {856 u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);857 858 dma_csr |= DMA_FIFO_INV;859 sbus_writel(dma_csr, lp->dregs + DMA_CSR);860 }861 862 lp->init_ring(dev);863 load_csrs(lp);864 init_restart_lance(lp);865 netif_wake_queue(dev);866 }867 868 sbus_writew(LE_C0_INEA, lp->lregs + RDP);869 870 return IRQ_HANDLED;871}872 873/* Build a fake network packet and send it to ourselves. */874static void build_fake_packet(struct lance_private *lp)875{876 struct net_device *dev = lp->dev;877 int i, entry;878 879 entry = lp->tx_new & TX_RING_MOD_MASK;880 if (lp->pio_buffer) {881 struct lance_init_block __iomem *ib = lp->init_block_iomem;882 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);883 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;884 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)885 sbus_writew(0, &packet[i]);886 for (i = 0; i < 6; i++) {887 sbus_writeb(dev->dev_addr[i], ð->h_dest[i]);888 sbus_writeb(dev->dev_addr[i], ð->h_source[i]);889 }890 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);891 sbus_writew(0, &ib->btx_ring[entry].misc);892 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);893 } else {894 struct lance_init_block *ib = lp->init_block_mem;895 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);896 struct ethhdr *eth = (struct ethhdr *) packet;897 memset(packet, 0, ETH_ZLEN);898 for (i = 0; i < 6; i++) {899 eth->h_dest[i] = dev->dev_addr[i];900 eth->h_source[i] = dev->dev_addr[i];901 }902 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;903 ib->btx_ring[entry].misc = 0;904 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);905 }906 lp->tx_new = TX_NEXT(entry);907}908 909static int lance_open(struct net_device *dev)910{911 struct lance_private *lp = netdev_priv(dev);912 int status = 0;913 914 STOP_LANCE(lp);915 916 if (request_irq(dev->irq, lance_interrupt, IRQF_SHARED,917 lancestr, (void *) dev)) {918 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);919 return -EAGAIN;920 }921 922 /* On the 4m, setup the ledma to provide the upper bits for buffers */923 if (lp->dregs) {924 u32 regval = lp->init_block_dvma & 0xff000000;925 926 sbus_writel(regval, lp->dregs + DMA_TEST);927 }928 929 /* Set mode and clear multicast filter only at device open,930 * so that lance_init_ring() called at any error will not931 * forget multicast filters.932 *933 * BTW it is common bug in all lance drivers! --ANK934 */935 if (lp->pio_buffer) {936 struct lance_init_block __iomem *ib = lp->init_block_iomem;937 sbus_writew(0, &ib->mode);938 sbus_writel(0, &ib->filter[0]);939 sbus_writel(0, &ib->filter[1]);940 } else {941 struct lance_init_block *ib = lp->init_block_mem;942 ib->mode = 0;943 ib->filter [0] = 0;944 ib->filter [1] = 0;945 }946 947 lp->init_ring(dev);948 load_csrs(lp);949 950 netif_start_queue(dev);951 952 status = init_restart_lance(lp);953 if (!status && lp->auto_select) {954 build_fake_packet(lp);955 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);956 }957 958 return status;959}960 961static int lance_close(struct net_device *dev)962{963 struct lance_private *lp = netdev_priv(dev);964 965 netif_stop_queue(dev);966 del_timer_sync(&lp->multicast_timer);967 968 STOP_LANCE(lp);969 970 free_irq(dev->irq, (void *) dev);971 return 0;972}973 974static int lance_reset(struct net_device *dev)975{976 struct lance_private *lp = netdev_priv(dev);977 int status;978 979 STOP_LANCE(lp);980 981 /* On the 4m, reset the dma too */982 if (lp->dregs) {983 u32 csr, addr;984 985 printk(KERN_ERR "resetting ledma\n");986 csr = sbus_readl(lp->dregs + DMA_CSR);987 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);988 udelay(200);989 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);990 991 addr = lp->init_block_dvma & 0xff000000;992 sbus_writel(addr, lp->dregs + DMA_TEST);993 }994 lp->init_ring(dev);995 load_csrs(lp);996 netif_trans_update(dev); /* prevent tx timeout */997 status = init_restart_lance(lp);998 return status;999}1000 1001static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)1002{1003 void __iomem *piobuf = dest;1004 u32 *p32;1005 u16 *p16;1006 u8 *p8;1007 1008 switch ((unsigned long)src & 0x3) {1009 case 0:1010 p32 = (u32 *) src;1011 while (len >= 4) {1012 sbus_writel(*p32, piobuf);1013 p32++;1014 piobuf += 4;1015 len -= 4;1016 }1017 src = (char *) p32;1018 break;1019 case 1:1020 case 3:1021 p8 = (u8 *) src;1022 while (len >= 4) {1023 u32 val;1024 1025 val = p8[0] << 24;1026 val |= p8[1] << 16;1027 val |= p8[2] << 8;1028 val |= p8[3];1029 sbus_writel(val, piobuf);1030 p8 += 4;1031 piobuf += 4;1032 len -= 4;1033 }1034 src = (char *) p8;1035 break;1036 case 2:1037 p16 = (u16 *) src;1038 while (len >= 4) {1039 u32 val = p16[0]<<16 | p16[1];1040 sbus_writel(val, piobuf);1041 p16 += 2;1042 piobuf += 4;1043 len -= 4;1044 }1045 src = (char *) p16;1046 break;1047 }1048 if (len >= 2) {1049 u16 val = src[0] << 8 | src[1];1050 sbus_writew(val, piobuf);1051 src += 2;1052 piobuf += 2;1053 len -= 2;1054 }1055 if (len >= 1)1056 sbus_writeb(src[0], piobuf);1057}1058 1059static void lance_piozero(void __iomem *dest, int len)1060{1061 void __iomem *piobuf = dest;1062 1063 if ((unsigned long)piobuf & 1) {1064 sbus_writeb(0, piobuf);1065 piobuf += 1;1066 len -= 1;1067 if (len == 0)1068 return;1069 }1070 if (len == 1) {1071 sbus_writeb(0, piobuf);1072 return;1073 }1074 if ((unsigned long)piobuf & 2) {1075 sbus_writew(0, piobuf);1076 piobuf += 2;1077 len -= 2;1078 if (len == 0)1079 return;1080 }1081 while (len >= 4) {1082 sbus_writel(0, piobuf);1083 piobuf += 4;1084 len -= 4;1085 }1086 if (len >= 2) {1087 sbus_writew(0, piobuf);1088 piobuf += 2;1089 len -= 2;1090 }1091 if (len >= 1)1092 sbus_writeb(0, piobuf);1093}1094 1095static void lance_tx_timeout(struct net_device *dev, unsigned int txqueue)1096{1097 struct lance_private *lp = netdev_priv(dev);1098 1099 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",1100 dev->name, sbus_readw(lp->lregs + RDP));1101 lance_reset(dev);1102 netif_wake_queue(dev);1103}1104 1105static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev)1106{1107 struct lance_private *lp = netdev_priv(dev);1108 int entry, skblen, len;1109 1110 skblen = skb->len;1111 1112 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;1113 1114 spin_lock_irq(&lp->lock);1115 1116 dev->stats.tx_bytes += len;1117 1118 entry = lp->tx_new & TX_RING_MOD_MASK;1119 if (lp->pio_buffer) {1120 struct lance_init_block __iomem *ib = lp->init_block_iomem;1121 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);1122 sbus_writew(0, &ib->btx_ring[entry].misc);1123 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);1124 if (len != skblen)1125 lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);1126 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);1127 } else {1128 struct lance_init_block *ib = lp->init_block_mem;1129 ib->btx_ring [entry].length = (-len) | 0xf000;1130 ib->btx_ring [entry].misc = 0;1131 skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);1132 if (len != skblen)1133 memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);1134 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);1135 }1136 1137 lp->tx_new = TX_NEXT(entry);1138 1139 if (TX_BUFFS_AVAIL <= 0)1140 netif_stop_queue(dev);1141 1142 /* Kick the lance: transmit now */1143 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);1144 1145 /* Read back CSR to invalidate the E-Cache.1146 * This is needed, because DMA_DSBL_WR_INV is set.1147 */1148 if (lp->dregs)1149 sbus_readw(lp->lregs + RDP);1150 1151 spin_unlock_irq(&lp->lock);1152 1153 dev_kfree_skb(skb);1154 1155 return NETDEV_TX_OK;1156}1157 1158/* taken from the depca driver */1159static void lance_load_multicast(struct net_device *dev)1160{1161 struct lance_private *lp = netdev_priv(dev);1162 struct netdev_hw_addr *ha;1163 u32 crc;1164 u32 val;1165 1166 /* set all multicast bits */1167 if (dev->flags & IFF_ALLMULTI)1168 val = ~0;1169 else1170 val = 0;1171 1172 if (lp->pio_buffer) {1173 struct lance_init_block __iomem *ib = lp->init_block_iomem;1174 sbus_writel(val, &ib->filter[0]);1175 sbus_writel(val, &ib->filter[1]);1176 } else {1177 struct lance_init_block *ib = lp->init_block_mem;1178 ib->filter [0] = val;1179 ib->filter [1] = val;1180 }1181 1182 if (dev->flags & IFF_ALLMULTI)1183 return;1184 1185 /* Add addresses */1186 netdev_for_each_mc_addr(ha, dev) {1187 crc = ether_crc_le(6, ha->addr);1188 crc = crc >> 26;1189 if (lp->pio_buffer) {1190 struct lance_init_block __iomem *ib = lp->init_block_iomem;1191 u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;1192 u16 tmp = sbus_readw(&mcast_table[crc>>4]);1193 tmp |= 1 << (crc & 0xf);1194 sbus_writew(tmp, &mcast_table[crc>>4]);1195 } else {1196 struct lance_init_block *ib = lp->init_block_mem;1197 u16 *mcast_table = (u16 *) &ib->filter;1198 mcast_table [crc >> 4] |= 1 << (crc & 0xf);1199 }1200 }1201}1202 1203static void lance_set_multicast(struct net_device *dev)1204{1205 struct lance_private *lp = netdev_priv(dev);1206 struct lance_init_block *ib_mem = lp->init_block_mem;1207 struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;1208 u16 mode;1209 1210 if (!netif_running(dev))1211 return;1212 1213 if (lp->tx_old != lp->tx_new) {1214 mod_timer(&lp->multicast_timer, jiffies + 4);1215 netif_wake_queue(dev);1216 return;1217 }1218 1219 netif_stop_queue(dev);1220 1221 STOP_LANCE(lp);1222 lp->init_ring(dev);1223 1224 if (lp->pio_buffer)1225 mode = sbus_readw(&ib_iomem->mode);1226 else1227 mode = ib_mem->mode;1228 if (dev->flags & IFF_PROMISC) {1229 mode |= LE_MO_PROM;1230 if (lp->pio_buffer)1231 sbus_writew(mode, &ib_iomem->mode);1232 else1233 ib_mem->mode = mode;1234 } else {1235 mode &= ~LE_MO_PROM;1236 if (lp->pio_buffer)1237 sbus_writew(mode, &ib_iomem->mode);1238 else1239 ib_mem->mode = mode;1240 lance_load_multicast(dev);1241 }1242 load_csrs(lp);1243 init_restart_lance(lp);1244 netif_wake_queue(dev);1245}1246 1247static void lance_set_multicast_retry(struct timer_list *t)1248{1249 struct lance_private *lp = from_timer(lp, t, multicast_timer);1250 struct net_device *dev = lp->dev;1251 1252 lance_set_multicast(dev);1253}1254 1255static void lance_free_hwresources(struct lance_private *lp)1256{1257 if (lp->lregs)1258 of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);1259 if (lp->dregs) {1260 struct platform_device *ledma = lp->ledma;1261 1262 of_iounmap(&ledma->resource[0], lp->dregs,1263 resource_size(&ledma->resource[0]));1264 }1265 if (lp->init_block_iomem) {1266 of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,1267 sizeof(struct lance_init_block));1268 } else if (lp->init_block_mem) {1269 dma_free_coherent(&lp->op->dev,1270 sizeof(struct lance_init_block),1271 lp->init_block_mem,1272 lp->init_block_dvma);1273 }1274}1275 1276/* Ethtool support... */1277static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)1278{1279 strscpy(info->driver, "sunlance", sizeof(info->driver));1280}1281 1282static const struct ethtool_ops sparc_lance_ethtool_ops = {1283 .get_drvinfo = sparc_lance_get_drvinfo,1284 .get_link = ethtool_op_get_link,1285};1286 1287static const struct net_device_ops sparc_lance_ops = {1288 .ndo_open = lance_open,1289 .ndo_stop = lance_close,1290 .ndo_start_xmit = lance_start_xmit,1291 .ndo_set_rx_mode = lance_set_multicast,1292 .ndo_tx_timeout = lance_tx_timeout,1293 .ndo_set_mac_address = eth_mac_addr,1294 .ndo_validate_addr = eth_validate_addr,1295};1296 1297static int sparc_lance_probe_one(struct platform_device *op,1298 struct platform_device *ledma,1299 struct platform_device *lebuffer)1300{1301 struct device_node *dp = op->dev.of_node;1302 struct lance_private *lp;1303 struct net_device *dev;1304 1305 dev = alloc_etherdev(sizeof(struct lance_private) + 8);1306 if (!dev)1307 return -ENOMEM;1308 1309 lp = netdev_priv(dev);1310 1311 spin_lock_init(&lp->lock);1312 1313 /* Copy the IDPROM ethernet address to the device structure, later we1314 * will copy the address in the device structure to the lance1315 * initialization block.1316 */1317 eth_hw_addr_set(dev, idprom->id_ethaddr);1318 1319 /* Get the IO region */1320 lp->lregs = of_ioremap(&op->resource[0], 0,1321 LANCE_REG_SIZE, lancestr);1322 if (!lp->lregs) {1323 printk(KERN_ERR "SunLance: Cannot map registers.\n");1324 goto fail;1325 }1326 1327 lp->ledma = ledma;1328 if (lp->ledma) {1329 lp->dregs = of_ioremap(&ledma->resource[0], 0,1330 resource_size(&ledma->resource[0]),1331 "ledma");1332 if (!lp->dregs) {1333 printk(KERN_ERR "SunLance: Cannot map "1334 "ledma registers.\n");1335 goto fail;1336 }1337 }1338 1339 lp->op = op;1340 lp->lebuffer = lebuffer;1341 if (lebuffer) {1342 /* sanity check */1343 if (lebuffer->resource[0].start & 7) {1344 printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");1345 goto fail;1346 }1347 lp->init_block_iomem =1348 of_ioremap(&lebuffer->resource[0], 0,1349 sizeof(struct lance_init_block), "lebuffer");1350 if (!lp->init_block_iomem) {1351 printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");1352 goto fail;1353 }1354 lp->init_block_dvma = 0;1355 lp->pio_buffer = 1;1356 lp->init_ring = lance_init_ring_pio;1357 lp->rx = lance_rx_pio;1358 lp->tx = lance_tx_pio;1359 } else {1360 lp->init_block_mem =1361 dma_alloc_coherent(&op->dev,1362 sizeof(struct lance_init_block),1363 &lp->init_block_dvma, GFP_ATOMIC);1364 if (!lp->init_block_mem)1365 goto fail;1366 1367 lp->pio_buffer = 0;1368 lp->init_ring = lance_init_ring_dvma;1369 lp->rx = lance_rx_dvma;1370 lp->tx = lance_tx_dvma;1371 }1372 lp->busmaster_regval = of_getintprop_default(dp, "busmaster-regval",1373 (LE_C3_BSWP |1374 LE_C3_ACON |1375 LE_C3_BCON));1376 1377 lp->name = lancestr;1378 1379 lp->burst_sizes = 0;1380 if (lp->ledma) {1381 struct device_node *ledma_dp = ledma->dev.of_node;1382 struct device_node *sbus_dp;1383 unsigned int sbmask;1384 const char *prop;1385 u32 csr;1386 1387 /* Find burst-size property for ledma */1388 lp->burst_sizes = of_getintprop_default(ledma_dp,1389 "burst-sizes", 0);1390 1391 /* ledma may be capable of fast bursts, but sbus may not. */1392 sbus_dp = ledma_dp->parent;1393 sbmask = of_getintprop_default(sbus_dp, "burst-sizes",1394 DMA_BURSTBITS);1395 lp->burst_sizes &= sbmask;1396 1397 /* Get the cable-selection property */1398 prop = of_get_property(ledma_dp, "cable-selection", NULL);1399 if (!prop || prop[0] == '\0') {1400 struct device_node *nd;1401 1402 printk(KERN_INFO "SunLance: using "1403 "auto-carrier-detection.\n");1404 1405 nd = of_find_node_by_path("/options");1406 if (!nd)1407 goto no_link_test;1408 1409 prop = of_get_property(nd, "tpe-link-test?", NULL);1410 if (!prop)1411 goto node_put;1412 1413 if (strcmp(prop, "true")) {1414 printk(KERN_NOTICE "SunLance: warning: overriding option "1415 "'tpe-link-test?'\n");1416 printk(KERN_NOTICE "SunLance: warning: mail any problems "1417 "to ecd@skynet.be\n");1418 auxio_set_lte(AUXIO_LTE_ON);1419 }1420node_put:1421 of_node_put(nd);1422no_link_test:1423 lp->auto_select = 1;1424 lp->tpe = 0;1425 } else if (!strcmp(prop, "aui")) {1426 lp->auto_select = 0;1427 lp->tpe = 0;1428 } else {1429 lp->auto_select = 0;1430 lp->tpe = 1;1431 }1432 1433 /* Reset ledma */1434 csr = sbus_readl(lp->dregs + DMA_CSR);1435 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);1436 udelay(200);1437 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);1438 } else1439 lp->dregs = NULL;1440 1441 lp->dev = dev;1442 SET_NETDEV_DEV(dev, &op->dev);1443 dev->watchdog_timeo = 5*HZ;1444 dev->ethtool_ops = &sparc_lance_ethtool_ops;1445 dev->netdev_ops = &sparc_lance_ops;1446 1447 dev->irq = op->archdata.irqs[0];1448 1449 /* We cannot sleep if the chip is busy during a1450 * multicast list update event, because such events1451 * can occur from interrupts (ex. IPv6). So we1452 * use a timer to try again later when necessary. -DaveM1453 */1454 timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);1455 1456 if (register_netdev(dev)) {1457 printk(KERN_ERR "SunLance: Cannot register device.\n");1458 goto fail;1459 }1460 1461 platform_set_drvdata(op, lp);1462 1463 printk(KERN_INFO "%s: LANCE %pM\n",1464 dev->name, dev->dev_addr);1465 1466 return 0;1467 1468fail:1469 lance_free_hwresources(lp);1470 free_netdev(dev);1471 return -ENODEV;1472}1473 1474static int sunlance_sbus_probe(struct platform_device *op)1475{1476 struct platform_device *parent = to_platform_device(op->dev.parent);1477 struct device_node *parent_dp = parent->dev.of_node;1478 int err;1479 1480 if (of_node_name_eq(parent_dp, "ledma")) {1481 err = sparc_lance_probe_one(op, parent, NULL);1482 } else if (of_node_name_eq(parent_dp, "lebuffer")) {1483 err = sparc_lance_probe_one(op, NULL, parent);1484 } else1485 err = sparc_lance_probe_one(op, NULL, NULL);1486 1487 return err;1488}1489 1490static void sunlance_sbus_remove(struct platform_device *op)1491{1492 struct lance_private *lp = platform_get_drvdata(op);1493 struct net_device *net_dev = lp->dev;1494 1495 unregister_netdev(net_dev);1496 1497 lance_free_hwresources(lp);1498 1499 free_netdev(net_dev);1500}1501 1502static const struct of_device_id sunlance_sbus_match[] = {1503 {1504 .name = "le",1505 },1506 {},1507};1508 1509MODULE_DEVICE_TABLE(of, sunlance_sbus_match);1510 1511static struct platform_driver sunlance_sbus_driver = {1512 .driver = {1513 .name = "sunlance",1514 .of_match_table = sunlance_sbus_match,1515 },1516 .probe = sunlance_sbus_probe,1517 .remove_new = sunlance_sbus_remove,1518};1519 1520module_platform_driver(sunlance_sbus_driver);1521