1/* de2104x.c: A Linux PCI Ethernet driver for Intel/Digital 21040/1 chips. */
   2/*
   3	Copyright 2001,2003 Jeff Garzik <jgarzik@pobox.com>
   4
   5	Copyright 1994, 1995 Digital Equipment Corporation.	    [de4x5.c]
   6	Written/copyright 1994-2001 by Donald Becker.		    [tulip.c]
   7
   8	This software may be used and distributed according to the terms of
   9	the GNU General Public License (GPL), incorporated herein by reference.
  10	Drivers based on or derived from this code fall under the GPL and must
  11	retain the authorship, copyright and license notice.  This file is not
  12	a complete program and may only be used when the entire operating
  13	system is licensed under the GPL.
  14
  15	See the file COPYING in this distribution for more information.
  16
  17	TODO, in rough priority order:
  18	* Support forcing media type with a module parameter,
  19	  like dl2k.c/sundance.c
  20	* Constants (module parms?) for Rx work limit
  21	* Complete reset on PciErr
  22	* Jumbo frames / dev->change_mtu
  23	* Adjust Rx FIFO threshold and Max Rx DMA burst on Rx FIFO error
  24	* Adjust Tx FIFO threshold and Max Tx DMA burst on Tx FIFO error
  25	* Implement Tx software interrupt mitigation via
  26	  Tx descriptor bit
  27
  28 */
  29
  30#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  31
  32#define DRV_NAME		"de2104x"
  33#define DRV_RELDATE		"Mar 17, 2004"
  34
  35#include <linux/module.h>
  36#include <linux/kernel.h>
  37#include <linux/netdevice.h>
  38#include <linux/etherdevice.h>
  39#include <linux/init.h>
  40#include <linux/interrupt.h>
  41#include <linux/pci.h>
  42#include <linux/delay.h>
  43#include <linux/ethtool.h>
  44#include <linux/compiler.h>
  45#include <linux/rtnetlink.h>
  46#include <linux/crc32.h>
  47#include <linux/slab.h>
  48
  49#include <asm/io.h>
  50#include <asm/irq.h>
  51#include <linux/uaccess.h>
  52#include <asm/unaligned.h>
  53
  54MODULE_AUTHOR("Jeff Garzik <jgarzik@pobox.com>");
  55MODULE_DESCRIPTION("Intel/Digital 21040/1 series PCI Ethernet driver");
  56MODULE_LICENSE("GPL");
  57
  58static int debug = -1;
  59module_param (debug, int, 0);
  60MODULE_PARM_DESC (debug, "de2104x bitmapped message enable number");
  61
  62/* Set the copy breakpoint for the copy-only-tiny-buffer Rx structure. */
  63#if defined(__alpha__) || defined(__arm__) || defined(__hppa__) || \
  64        defined(CONFIG_SPARC) || defined(__ia64__) ||		   \
  65        defined(__sh__) || defined(__mips__)
  66static int rx_copybreak = 1518;
  67#else
  68static int rx_copybreak = 100;
  69#endif
  70module_param (rx_copybreak, int, 0);
  71MODULE_PARM_DESC (rx_copybreak, "de2104x Breakpoint at which Rx packets are copied");
  72
  73#define DE_DEF_MSG_ENABLE	(NETIF_MSG_DRV		| \
  74				 NETIF_MSG_PROBE 	| \
  75				 NETIF_MSG_LINK		| \
  76				 NETIF_MSG_IFDOWN	| \
  77				 NETIF_MSG_IFUP		| \
  78				 NETIF_MSG_RX_ERR	| \
  79				 NETIF_MSG_TX_ERR)
  80
  81/* Descriptor skip length in 32 bit longwords. */
  82#ifndef CONFIG_DE2104X_DSL
  83#define DSL			0
  84#else
  85#define DSL			CONFIG_DE2104X_DSL
  86#endif
  87
  88#define DE_RX_RING_SIZE		128
  89#define DE_TX_RING_SIZE		64
  90#define DE_RING_BYTES		\
  91		((sizeof(struct de_desc) * DE_RX_RING_SIZE) +	\
  92		(sizeof(struct de_desc) * DE_TX_RING_SIZE))
  93#define NEXT_TX(N)		(((N) + 1) & (DE_TX_RING_SIZE - 1))
  94#define NEXT_RX(N)		(((N) + 1) & (DE_RX_RING_SIZE - 1))
  95#define TX_BUFFS_AVAIL(CP)					\
  96	(((CP)->tx_tail <= (CP)->tx_head) ?			\
  97	  (CP)->tx_tail + (DE_TX_RING_SIZE - 1) - (CP)->tx_head :	\
  98	  (CP)->tx_tail - (CP)->tx_head - 1)
  99
 100#define PKT_BUF_SZ		1536	/* Size of each temporary Rx buffer.*/
 101#define RX_OFFSET		2
 102
 103#define DE_SETUP_SKB		((struct sk_buff *) 1)
 104#define DE_DUMMY_SKB		((struct sk_buff *) 2)
 105#define DE_SETUP_FRAME_WORDS	96
 106#define DE_EEPROM_WORDS		256
 107#define DE_EEPROM_SIZE		(DE_EEPROM_WORDS * sizeof(u16))
 108#define DE_MAX_MEDIA		5
 109
 110#define DE_MEDIA_TP_AUTO	0
 111#define DE_MEDIA_BNC		1
 112#define DE_MEDIA_AUI		2
 113#define DE_MEDIA_TP		3
 114#define DE_MEDIA_TP_FD		4
 115#define DE_MEDIA_INVALID	DE_MAX_MEDIA
 116#define DE_MEDIA_FIRST		0
 117#define DE_MEDIA_LAST		(DE_MAX_MEDIA - 1)
 118#define DE_AUI_BNC		(SUPPORTED_AUI | SUPPORTED_BNC)
 119
 120#define DE_TIMER_LINK		(60 * HZ)
 121#define DE_TIMER_NO_LINK	(5 * HZ)
 122
 123#define DE_NUM_REGS		16
 124#define DE_REGS_SIZE		(DE_NUM_REGS * sizeof(u32))
 125#define DE_REGS_VER		1
 126
 127/* Time in jiffies before concluding the transmitter is hung. */
 128#define TX_TIMEOUT		(6*HZ)
 129
 130/* This is a mysterious value that can be written to CSR11 in the 21040 (only)
 131   to support a pre-NWay full-duplex signaling mechanism using short frames.
 132   No one knows what it should be, but if left at its default value some
 133   10base2(!) packets trigger a full-duplex-request interrupt. */
 134#define FULL_DUPLEX_MAGIC	0x6969
 135
 136enum {
 137	/* NIC registers */
 138	BusMode			= 0x00,
 139	TxPoll			= 0x08,
 140	RxPoll			= 0x10,
 141	RxRingAddr		= 0x18,
 142	TxRingAddr		= 0x20,
 143	MacStatus		= 0x28,
 144	MacMode			= 0x30,
 145	IntrMask		= 0x38,
 146	RxMissed		= 0x40,
 147	ROMCmd			= 0x48,
 148	CSR11			= 0x58,
 149	SIAStatus		= 0x60,
 150	CSR13			= 0x68,
 151	CSR14			= 0x70,
 152	CSR15			= 0x78,
 153	PCIPM			= 0x40,
 154
 155	/* BusMode bits */
 156	CmdReset		= (1 << 0),
 157	CacheAlign16		= 0x00008000,
 158	BurstLen4		= 0x00000400,
 159	DescSkipLen		= (DSL << 2),
 160
 161	/* Rx/TxPoll bits */
 162	NormalTxPoll		= (1 << 0),
 163	NormalRxPoll		= (1 << 0),
 164
 165	/* Tx/Rx descriptor status bits */
 166	DescOwn			= (1 << 31),
 167	RxError			= (1 << 15),
 168	RxErrLong		= (1 << 7),
 169	RxErrCRC		= (1 << 1),
 170	RxErrFIFO		= (1 << 0),
 171	RxErrRunt		= (1 << 11),
 172	RxErrFrame		= (1 << 14),
 173	RingEnd			= (1 << 25),
 174	FirstFrag		= (1 << 29),
 175	LastFrag		= (1 << 30),
 176	TxError			= (1 << 15),
 177	TxFIFOUnder		= (1 << 1),
 178	TxLinkFail		= (1 << 2) | (1 << 10) | (1 << 11),
 179	TxMaxCol		= (1 << 8),
 180	TxOWC			= (1 << 9),
 181	TxJabber		= (1 << 14),
 182	SetupFrame		= (1 << 27),
 183	TxSwInt			= (1 << 31),
 184
 185	/* MacStatus bits */
 186	IntrOK			= (1 << 16),
 187	IntrErr			= (1 << 15),
 188	RxIntr			= (1 << 6),
 189	RxEmpty			= (1 << 7),
 190	TxIntr			= (1 << 0),
 191	TxEmpty			= (1 << 2),
 192	PciErr			= (1 << 13),
 193	TxState			= (1 << 22) | (1 << 21) | (1 << 20),
 194	RxState			= (1 << 19) | (1 << 18) | (1 << 17),
 195	LinkFail		= (1 << 12),
 196	LinkPass		= (1 << 4),
 197	RxStopped		= (1 << 8),
 198	TxStopped		= (1 << 1),
 199
 200	/* MacMode bits */
 201	TxEnable		= (1 << 13),
 202	RxEnable		= (1 << 1),
 203	RxTx			= TxEnable | RxEnable,
 204	FullDuplex		= (1 << 9),
 205	AcceptAllMulticast	= (1 << 7),
 206	AcceptAllPhys		= (1 << 6),
 207	BOCnt			= (1 << 5),
 208	MacModeClear		= (1<<12) | (1<<11) | (1<<10) | (1<<8) | (1<<3) |
 209				  RxTx | BOCnt | AcceptAllPhys | AcceptAllMulticast,
 210
 211	/* ROMCmd bits */
 212	EE_SHIFT_CLK		= 0x02,	/* EEPROM shift clock. */
 213	EE_CS			= 0x01,	/* EEPROM chip select. */
 214	EE_DATA_WRITE		= 0x04,	/* Data from the Tulip to EEPROM. */
 215	EE_WRITE_0		= 0x01,
 216	EE_WRITE_1		= 0x05,
 217	EE_DATA_READ		= 0x08,	/* Data from the EEPROM chip. */
 218	EE_ENB			= (0x4800 | EE_CS),
 219
 220	/* The EEPROM commands include the alway-set leading bit. */
 221	EE_READ_CMD		= 6,
 222
 223	/* RxMissed bits */
 224	RxMissedOver		= (1 << 16),
 225	RxMissedMask		= 0xffff,
 226
 227	/* SROM-related bits */
 228	SROMC0InfoLeaf		= 27,
 229	MediaBlockMask		= 0x3f,
 230	MediaCustomCSRs		= (1 << 6),
 231
 232	/* PCIPM bits */
 233	PM_Sleep		= (1 << 31),
 234	PM_Snooze		= (1 << 30),
 235	PM_Mask			= PM_Sleep | PM_Snooze,
 236
 237	/* SIAStatus bits */
 238	NWayState		= (1 << 14) | (1 << 13) | (1 << 12),
 239	NWayRestart		= (1 << 12),
 240	NonselPortActive	= (1 << 9),
 241	SelPortActive		= (1 << 8),
 242	LinkFailStatus		= (1 << 2),
 243	NetCxnErr		= (1 << 1),
 244};
 245
 246static const u32 de_intr_mask =
 247	IntrOK | IntrErr | RxIntr | RxEmpty | TxIntr | TxEmpty |
 248	LinkPass | LinkFail | PciErr;
 249
 250/*
 251 * Set the programmable burst length to 4 longwords for all:
 252 * DMA errors result without these values. Cache align 16 long.
 253 */
 254static const u32 de_bus_mode = CacheAlign16 | BurstLen4 | DescSkipLen;
 255
 256struct de_srom_media_block {
 257	u8			opts;
 258	u16			csr13;
 259	u16			csr14;
 260	u16			csr15;
 261} __packed;
 262
 263struct de_srom_info_leaf {
 264	u16			default_media;
 265	u8			n_blocks;
 266	u8			unused;
 267} __packed;
 268
 269struct de_desc {
 270	__le32			opts1;
 271	__le32			opts2;
 272	__le32			addr1;
 273	__le32			addr2;
 274#if DSL
 275	__le32			skip[DSL];
 276#endif
 277};
 278
 279struct media_info {
 280	u16			type;	/* DE_MEDIA_xxx */
 281	u16			csr13;
 282	u16			csr14;
 283	u16			csr15;
 284};
 285
 286struct ring_info {
 287	struct sk_buff		*skb;
 288	dma_addr_t		mapping;
 289};
 290
 291struct de_private {
 292	unsigned		tx_head;
 293	unsigned		tx_tail;
 294	unsigned		rx_tail;
 295
 296	void			__iomem *regs;
 297	struct net_device	*dev;
 298	spinlock_t		lock;
 299
 300	struct de_desc		*rx_ring;
 301	struct de_desc		*tx_ring;
 302	struct ring_info	tx_skb[DE_TX_RING_SIZE];
 303	struct ring_info	rx_skb[DE_RX_RING_SIZE];
 304	unsigned		rx_buf_sz;
 305	dma_addr_t		ring_dma;
 306
 307	u32			msg_enable;
 308
 309	struct pci_dev		*pdev;
 310
 311	u16			setup_frame[DE_SETUP_FRAME_WORDS];
 312
 313	u32			media_type;
 314	u32			media_supported;
 315	u32			media_advertise;
 316	struct media_info	media[DE_MAX_MEDIA];
 317	struct timer_list	media_timer;
 318
 319	u8			*ee_data;
 320	unsigned		board_idx;
 321	unsigned		de21040 : 1;
 322	unsigned		media_lock : 1;
 323};
 324
 325
 326static void de_set_rx_mode (struct net_device *dev);
 327static void de_tx (struct de_private *de);
 328static void de_clean_rings (struct de_private *de);
 329static void de_media_interrupt (struct de_private *de, u32 status);
 330static void de21040_media_timer (struct timer_list *t);
 331static void de21041_media_timer (struct timer_list *t);
 332static unsigned int de_ok_to_advertise (struct de_private *de, u32 new_media);
 333
 334
 335static const struct pci_device_id de_pci_tbl[] = {
 336	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP,
 337	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 338	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_PLUS,
 339	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 },
 340	{ },
 341};
 342MODULE_DEVICE_TABLE(pci, de_pci_tbl);
 343
 344static const char * const media_name[DE_MAX_MEDIA] = {
 345	"10baseT auto",
 346	"BNC",
 347	"AUI",
 348	"10baseT-HD",
 349	"10baseT-FD"
 350};
 351
 352/* 21040 transceiver register settings:
 353 * TP AUTO(unused), BNC(unused), AUI, TP, TP FD*/
 354static u16 t21040_csr13[] = { 0, 0, 0x8F09, 0x8F01, 0x8F01, };
 355static u16 t21040_csr14[] = { 0, 0, 0x0705, 0xFFFF, 0xFFFD, };
 356static u16 t21040_csr15[] = { 0, 0, 0x0006, 0x0000, 0x0000, };
 357
 358/* 21041 transceiver register settings: TP AUTO, BNC, AUI, TP, TP FD*/
 359static u16 t21041_csr13[] = { 0xEF01, 0xEF09, 0xEF09, 0xEF01, 0xEF09, };
 360static u16 t21041_csr14[] = { 0xFFFF, 0xF7FD, 0xF7FD, 0x7F3F, 0x7F3D, };
 361/* If on-chip autonegotiation is broken, use half-duplex (FF3F) instead */
 362static u16 t21041_csr14_brk[] = { 0xFF3F, 0xF7FD, 0xF7FD, 0x7F3F, 0x7F3D, };
 363static u16 t21041_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, };
 364
 365
 366#define dr32(reg)	ioread32(de->regs + (reg))
 367#define dw32(reg, val)	iowrite32((val), de->regs + (reg))
 368
 369
 370static void de_rx_err_acct (struct de_private *de, unsigned rx_tail,
 371			    u32 status, u32 len)
 372{
 373	netif_dbg(de, rx_err, de->dev,
 374		  "rx err, slot %d status 0x%x len %d\n",
 375		  rx_tail, status, len);
 376
 377	if ((status & 0x38000300) != 0x0300) {
 378		/* Ingore earlier buffers. */
 379		if ((status & 0xffff) != 0x7fff) {
 380			netif_warn(de, rx_err, de->dev,
 381				   "Oversized Ethernet frame spanned multiple buffers, status %08x!\n",
 382				   status);
 383			de->dev->stats.rx_length_errors++;
 384		}
 385	} else if (status & RxError) {
 386		/* There was a fatal error. */
 387		de->dev->stats.rx_errors++; /* end of a packet.*/
 388		if (status & 0x0890) de->dev->stats.rx_length_errors++;
 389		if (status & RxErrCRC) de->dev->stats.rx_crc_errors++;
 390		if (status & RxErrFIFO) de->dev->stats.rx_fifo_errors++;
 391	}
 392}
 393
 394static void de_rx (struct de_private *de)
 395{
 396	unsigned rx_tail = de->rx_tail;
 397	unsigned rx_work = DE_RX_RING_SIZE;
 398	unsigned drop = 0;
 399	int rc;
 400
 401	while (--rx_work) {
 402		u32 status, len;
 403		dma_addr_t mapping;
 404		struct sk_buff *skb, *copy_skb;
 405		unsigned copying_skb, buflen;
 406
 407		skb = de->rx_skb[rx_tail].skb;
 408		BUG_ON(!skb);
 409		rmb();
 410		status = le32_to_cpu(de->rx_ring[rx_tail].opts1);
 411		if (status & DescOwn)
 412			break;
 413
 414		/* the length is actually a 15 bit value here according
 415		 * to Table 4-1 in the DE2104x spec so mask is 0x7fff
 416		 */
 417		len = ((status >> 16) & 0x7fff) - 4;
 418		mapping = de->rx_skb[rx_tail].mapping;
 419
 420		if (unlikely(drop)) {
 421			de->dev->stats.rx_dropped++;
 422			goto rx_next;
 423		}
 424
 425		if (unlikely((status & 0x38008300) != 0x0300)) {
 426			de_rx_err_acct(de, rx_tail, status, len);
 427			goto rx_next;
 428		}
 429
 430		copying_skb = (len <= rx_copybreak);
 431
 432		netif_dbg(de, rx_status, de->dev,
 433			  "rx slot %d status 0x%x len %d copying? %d\n",
 434			  rx_tail, status, len, copying_skb);
 435
 436		buflen = copying_skb ? (len + RX_OFFSET) : de->rx_buf_sz;
 437		copy_skb = netdev_alloc_skb(de->dev, buflen);
 438		if (unlikely(!copy_skb)) {
 439			de->dev->stats.rx_dropped++;
 440			drop = 1;
 441			rx_work = 100;
 442			goto rx_next;
 443		}
 444
 445		if (!copying_skb) {
 446			dma_unmap_single(&de->pdev->dev, mapping, buflen,
 447					 DMA_FROM_DEVICE);
 448			skb_put(skb, len);
 449
 450			mapping =
 451			de->rx_skb[rx_tail].mapping =
 452				dma_map_single(&de->pdev->dev, copy_skb->data,
 453					       buflen, DMA_FROM_DEVICE);
 454			de->rx_skb[rx_tail].skb = copy_skb;
 455		} else {
 456			dma_sync_single_for_cpu(&de->pdev->dev, mapping, len,
 457						DMA_FROM_DEVICE);
 458			skb_reserve(copy_skb, RX_OFFSET);
 459			skb_copy_from_linear_data(skb, skb_put(copy_skb, len),
 460						  len);
 461			dma_sync_single_for_device(&de->pdev->dev, mapping,
 462						   len, DMA_FROM_DEVICE);
 463
 464			/* We'll reuse the original ring buffer. */
 465			skb = copy_skb;
 466		}
 467
 468		skb->protocol = eth_type_trans (skb, de->dev);
 469
 470		de->dev->stats.rx_packets++;
 471		de->dev->stats.rx_bytes += skb->len;
 472		rc = netif_rx (skb);
 473		if (rc == NET_RX_DROP)
 474			drop = 1;
 475
 476rx_next:
 477		if (rx_tail == (DE_RX_RING_SIZE - 1))
 478			de->rx_ring[rx_tail].opts2 =
 479				cpu_to_le32(RingEnd | de->rx_buf_sz);
 480		else
 481			de->rx_ring[rx_tail].opts2 = cpu_to_le32(de->rx_buf_sz);
 482		de->rx_ring[rx_tail].addr1 = cpu_to_le32(mapping);
 483		wmb();
 484		de->rx_ring[rx_tail].opts1 = cpu_to_le32(DescOwn);
 485		rx_tail = NEXT_RX(rx_tail);
 486	}
 487
 488	if (!rx_work)
 489		netdev_warn(de->dev, "rx work limit reached\n");
 490
 491	de->rx_tail = rx_tail;
 492}
 493
 494static irqreturn_t de_interrupt (int irq, void *dev_instance)
 495{
 496	struct net_device *dev = dev_instance;
 497	struct de_private *de = netdev_priv(dev);
 498	u32 status;
 499
 500	status = dr32(MacStatus);
 501	if ((!(status & (IntrOK|IntrErr))) || (status == 0xFFFF))
 502		return IRQ_NONE;
 503
 504	netif_dbg(de, intr, dev, "intr, status %08x mode %08x desc %u/%u/%u\n",
 505		  status, dr32(MacMode),
 506		  de->rx_tail, de->tx_head, de->tx_tail);
 507
 508	dw32(MacStatus, status);
 509
 510	if (status & (RxIntr | RxEmpty)) {
 511		de_rx(de);
 512		if (status & RxEmpty)
 513			dw32(RxPoll, NormalRxPoll);
 514	}
 515
 516	spin_lock(&de->lock);
 517
 518	if (status & (TxIntr | TxEmpty))
 519		de_tx(de);
 520
 521	if (status & (LinkPass | LinkFail))
 522		de_media_interrupt(de, status);
 523
 524	spin_unlock(&de->lock);
 525
 526	if (status & PciErr) {
 527		u16 pci_status;
 528
 529		pci_read_config_word(de->pdev, PCI_STATUS, &pci_status);
 530		pci_write_config_word(de->pdev, PCI_STATUS, pci_status);
 531		netdev_err(de->dev,
 532			   "PCI bus error, status=%08x, PCI status=%04x\n",
 533			   status, pci_status);
 534	}
 535
 536	return IRQ_HANDLED;
 537}
 538
 539static void de_tx (struct de_private *de)
 540{
 541	unsigned tx_head = de->tx_head;
 542	unsigned tx_tail = de->tx_tail;
 543
 544	while (tx_tail != tx_head) {
 545		struct sk_buff *skb;
 546		u32 status;
 547
 548		rmb();
 549		status = le32_to_cpu(de->tx_ring[tx_tail].opts1);
 550		if (status & DescOwn)
 551			break;
 552
 553		skb = de->tx_skb[tx_tail].skb;
 554		BUG_ON(!skb);
 555		if (unlikely(skb == DE_DUMMY_SKB))
 556			goto next;
 557
 558		if (unlikely(skb == DE_SETUP_SKB)) {
 559			dma_unmap_single(&de->pdev->dev,
 560					 de->tx_skb[tx_tail].mapping,
 561					 sizeof(de->setup_frame),
 562					 DMA_TO_DEVICE);
 563			goto next;
 564		}
 565
 566		dma_unmap_single(&de->pdev->dev, de->tx_skb[tx_tail].mapping,
 567				 skb->len, DMA_TO_DEVICE);
 568
 569		if (status & LastFrag) {
 570			if (status & TxError) {
 571				netif_dbg(de, tx_err, de->dev,
 572					  "tx err, status 0x%x\n",
 573					  status);
 574				de->dev->stats.tx_errors++;
 575				if (status & TxOWC)
 576					de->dev->stats.tx_window_errors++;
 577				if (status & TxMaxCol)
 578					de->dev->stats.tx_aborted_errors++;
 579				if (status & TxLinkFail)
 580					de->dev->stats.tx_carrier_errors++;
 581				if (status & TxFIFOUnder)
 582					de->dev->stats.tx_fifo_errors++;
 583			} else {
 584				de->dev->stats.tx_packets++;
 585				de->dev->stats.tx_bytes += skb->len;
 586				netif_dbg(de, tx_done, de->dev,
 587					  "tx done, slot %d\n", tx_tail);
 588			}
 589			dev_consume_skb_irq(skb);
 590		}
 591
 592next:
 593		de->tx_skb[tx_tail].skb = NULL;
 594
 595		tx_tail = NEXT_TX(tx_tail);
 596	}
 597
 598	de->tx_tail = tx_tail;
 599
 600	if (netif_queue_stopped(de->dev) && (TX_BUFFS_AVAIL(de) > (DE_TX_RING_SIZE / 4)))
 601		netif_wake_queue(de->dev);
 602}
 603
 604static netdev_tx_t de_start_xmit (struct sk_buff *skb,
 605					struct net_device *dev)
 606{
 607	struct de_private *de = netdev_priv(dev);
 608	unsigned int entry, tx_free;
 609	u32 mapping, len, flags = FirstFrag | LastFrag;
 610	struct de_desc *txd;
 611
 612	spin_lock_irq(&de->lock);
 613
 614	tx_free = TX_BUFFS_AVAIL(de);
 615	if (tx_free == 0) {
 616		netif_stop_queue(dev);
 617		spin_unlock_irq(&de->lock);
 618		return NETDEV_TX_BUSY;
 619	}
 620	tx_free--;
 621
 622	entry = de->tx_head;
 623
 624	txd = &de->tx_ring[entry];
 625
 626	len = skb->len;
 627	mapping = dma_map_single(&de->pdev->dev, skb->data, len,
 628				 DMA_TO_DEVICE);
 629	if (entry == (DE_TX_RING_SIZE - 1))
 630		flags |= RingEnd;
 631	if (!tx_free || (tx_free == (DE_TX_RING_SIZE / 2)))
 632		flags |= TxSwInt;
 633	flags |= len;
 634	txd->opts2 = cpu_to_le32(flags);
 635	txd->addr1 = cpu_to_le32(mapping);
 636
 637	de->tx_skb[entry].skb = skb;
 638	de->tx_skb[entry].mapping = mapping;
 639	wmb();
 640
 641	txd->opts1 = cpu_to_le32(DescOwn);
 642	wmb();
 643
 644	de->tx_head = NEXT_TX(entry);
 645	netif_dbg(de, tx_queued, dev, "tx queued, slot %d, skblen %d\n",
 646		  entry, skb->len);
 647
 648	if (tx_free == 0)
 649		netif_stop_queue(dev);
 650
 651	spin_unlock_irq(&de->lock);
 652
 653	/* Trigger an immediate transmit demand. */
 654	dw32(TxPoll, NormalTxPoll);
 655
 656	return NETDEV_TX_OK;
 657}
 658
 659/* Set or clear the multicast filter for this adaptor.
 660   Note that we only use exclusion around actually queueing the
 661   new frame, not around filling de->setup_frame.  This is non-deterministic
 662   when re-entered but still correct. */
 663
 664static void build_setup_frame_hash(u16 *setup_frm, struct net_device *dev)
 665{
 666	struct de_private *de = netdev_priv(dev);
 667	u16 hash_table[32];
 668	struct netdev_hw_addr *ha;
 669	const u16 *eaddrs;
 670	int i;
 
 671
 672	memset(hash_table, 0, sizeof(hash_table));
 673	__set_bit_le(255, hash_table);			/* Broadcast entry */
 674	/* This should work on big-endian machines as well. */
 675	netdev_for_each_mc_addr(ha, dev) {
 676		int index = ether_crc_le(ETH_ALEN, ha->addr) & 0x1ff;
 677
 678		__set_bit_le(index, hash_table);
 679	}
 680
 681	for (i = 0; i < 32; i++) {
 682		*setup_frm++ = hash_table[i];
 683		*setup_frm++ = hash_table[i];
 684	}
 685	setup_frm = &de->setup_frame[13*6];
 686
 687	/* Fill the final entry with our physical address. */
 688	eaddrs = (const u16 *)dev->dev_addr;
 689	*setup_frm++ = eaddrs[0]; *setup_frm++ = eaddrs[0];
 690	*setup_frm++ = eaddrs[1]; *setup_frm++ = eaddrs[1];
 691	*setup_frm++ = eaddrs[2]; *setup_frm++ = eaddrs[2];
 692}
 693
 694static void build_setup_frame_perfect(u16 *setup_frm, struct net_device *dev)
 695{
 696	struct de_private *de = netdev_priv(dev);
 697	struct netdev_hw_addr *ha;
 698	const u16 *eaddrs;
 699
 700	/* We have <= 14 addresses so we can use the wonderful
 701	   16 address perfect filtering of the Tulip. */
 702	netdev_for_each_mc_addr(ha, dev) {
 703		eaddrs = (u16 *) ha->addr;
 704		*setup_frm++ = *eaddrs; *setup_frm++ = *eaddrs++;
 705		*setup_frm++ = *eaddrs; *setup_frm++ = *eaddrs++;
 706		*setup_frm++ = *eaddrs; *setup_frm++ = *eaddrs++;
 707	}
 708	/* Fill the unused entries with the broadcast address. */
 709	memset(setup_frm, 0xff, (15 - netdev_mc_count(dev)) * 12);
 710	setup_frm = &de->setup_frame[15*6];
 711
 712	/* Fill the final entry with our physical address. */
 713	eaddrs = (const u16 *)dev->dev_addr;
 714	*setup_frm++ = eaddrs[0]; *setup_frm++ = eaddrs[0];
 715	*setup_frm++ = eaddrs[1]; *setup_frm++ = eaddrs[1];
 716	*setup_frm++ = eaddrs[2]; *setup_frm++ = eaddrs[2];
 717}
 718
 719
 720static void __de_set_rx_mode (struct net_device *dev)
 721{
 722	struct de_private *de = netdev_priv(dev);
 723	u32 macmode;
 724	unsigned int entry;
 725	u32 mapping;
 726	struct de_desc *txd;
 727	struct de_desc *dummy_txd = NULL;
 728
 729	macmode = dr32(MacMode) & ~(AcceptAllMulticast | AcceptAllPhys);
 730
 731	if (dev->flags & IFF_PROMISC) {	/* Set promiscuous. */
 732		macmode |= AcceptAllMulticast | AcceptAllPhys;
 733		goto out;
 734	}
 735
 736	if ((netdev_mc_count(dev) > 1000) || (dev->flags & IFF_ALLMULTI)) {
 737		/* Too many to filter well -- accept all multicasts. */
 738		macmode |= AcceptAllMulticast;
 739		goto out;
 740	}
 741
 742	/* Note that only the low-address shortword of setup_frame is valid!
 743	   The values are doubled for big-endian architectures. */
 744	if (netdev_mc_count(dev) > 14)	/* Must use a multicast hash table. */
 745		build_setup_frame_hash (de->setup_frame, dev);
 746	else
 747		build_setup_frame_perfect (de->setup_frame, dev);
 748
 749	/*
 750	 * Now add this frame to the Tx list.
 751	 */
 752
 753	entry = de->tx_head;
 754
 755	/* Avoid a chip errata by prefixing a dummy entry. */
 756	if (entry != 0) {
 757		de->tx_skb[entry].skb = DE_DUMMY_SKB;
 758
 759		dummy_txd = &de->tx_ring[entry];
 760		dummy_txd->opts2 = (entry == (DE_TX_RING_SIZE - 1)) ?
 761				   cpu_to_le32(RingEnd) : 0;
 762		dummy_txd->addr1 = 0;
 763
 764		/* Must set DescOwned later to avoid race with chip */
 765
 766		entry = NEXT_TX(entry);
 767	}
 768
 769	de->tx_skb[entry].skb = DE_SETUP_SKB;
 770	de->tx_skb[entry].mapping = mapping =
 771	    dma_map_single(&de->pdev->dev, de->setup_frame,
 772			   sizeof(de->setup_frame), DMA_TO_DEVICE);
 773
 774	/* Put the setup frame on the Tx list. */
 775	txd = &de->tx_ring[entry];
 776	if (entry == (DE_TX_RING_SIZE - 1))
 777		txd->opts2 = cpu_to_le32(SetupFrame | RingEnd | sizeof (de->setup_frame));
 778	else
 779		txd->opts2 = cpu_to_le32(SetupFrame | sizeof (de->setup_frame));
 780	txd->addr1 = cpu_to_le32(mapping);
 781	wmb();
 782
 783	txd->opts1 = cpu_to_le32(DescOwn);
 784	wmb();
 785
 786	if (dummy_txd) {
 787		dummy_txd->opts1 = cpu_to_le32(DescOwn);
 788		wmb();
 789	}
 790
 791	de->tx_head = NEXT_TX(entry);
 792
 793	if (TX_BUFFS_AVAIL(de) == 0)
 794		netif_stop_queue(dev);
 795
 796	/* Trigger an immediate transmit demand. */
 797	dw32(TxPoll, NormalTxPoll);
 798
 799out:
 800	if (macmode != dr32(MacMode))
 801		dw32(MacMode, macmode);
 802}
 803
 804static void de_set_rx_mode (struct net_device *dev)
 805{
 806	unsigned long flags;
 807	struct de_private *de = netdev_priv(dev);
 808
 809	spin_lock_irqsave (&de->lock, flags);
 810	__de_set_rx_mode(dev);
 811	spin_unlock_irqrestore (&de->lock, flags);
 812}
 813
 814static inline void de_rx_missed(struct de_private *de, u32 rx_missed)
 815{
 816	if (unlikely(rx_missed & RxMissedOver))
 817		de->dev->stats.rx_missed_errors += RxMissedMask;
 818	else
 819		de->dev->stats.rx_missed_errors += (rx_missed & RxMissedMask);
 820}
 821
 822static void __de_get_stats(struct de_private *de)
 823{
 824	u32 tmp = dr32(RxMissed); /* self-clearing */
 825
 826	de_rx_missed(de, tmp);
 827}
 828
 829static struct net_device_stats *de_get_stats(struct net_device *dev)
 830{
 831	struct de_private *de = netdev_priv(dev);
 832
 833	/* The chip only need report frame silently dropped. */
 834	spin_lock_irq(&de->lock);
 835	if (netif_running(dev) && netif_device_present(dev))
 836		__de_get_stats(de);
 837	spin_unlock_irq(&de->lock);
 838
 839	return &dev->stats;
 840}
 841
 842static inline int de_is_running (struct de_private *de)
 843{
 844	return (dr32(MacStatus) & (RxState | TxState)) ? 1 : 0;
 845}
 846
 847static void de_stop_rxtx (struct de_private *de)
 848{
 849	u32 macmode;
 850	unsigned int i = 1300/100;
 851
 852	macmode = dr32(MacMode);
 853	if (macmode & RxTx) {
 854		dw32(MacMode, macmode & ~RxTx);
 855		dr32(MacMode);
 856	}
 857
 858	/* wait until in-flight frame completes.
 859	 * Max time @ 10BT: 1500*8b/10Mbps == 1200us (+ 100us margin)
 860	 * Typically expect this loop to end in < 50 us on 100BT.
 861	 */
 862	while (--i) {
 863		if (!de_is_running(de))
 864			return;
 865		udelay(100);
 866	}
 867
 868	netdev_warn(de->dev, "timeout expired, stopping DMA\n");
 869}
 870
 871static inline void de_start_rxtx (struct de_private *de)
 872{
 873	u32 macmode;
 874
 875	macmode = dr32(MacMode);
 876	if ((macmode & RxTx) != RxTx) {
 877		dw32(MacMode, macmode | RxTx);
 878		dr32(MacMode);
 879	}
 880}
 881
 882static void de_stop_hw (struct de_private *de)
 883{
 884
 885	udelay(5);
 886	dw32(IntrMask, 0);
 887
 888	de_stop_rxtx(de);
 889
 890	dw32(MacStatus, dr32(MacStatus));
 891
 892	udelay(10);
 893
 894	de->rx_tail = 0;
 895	de->tx_head = de->tx_tail = 0;
 896}
 897
 898static void de_link_up(struct de_private *de)
 899{
 900	if (!netif_carrier_ok(de->dev)) {
 901		netif_carrier_on(de->dev);
 902		netif_info(de, link, de->dev, "link up, media %s\n",
 903			   media_name[de->media_type]);
 904	}
 905}
 906
 907static void de_link_down(struct de_private *de)
 908{
 909	if (netif_carrier_ok(de->dev)) {
 910		netif_carrier_off(de->dev);
 911		netif_info(de, link, de->dev, "link down\n");
 912	}
 913}
 914
 915static void de_set_media (struct de_private *de)
 916{
 917	unsigned media = de->media_type;
 918	u32 macmode = dr32(MacMode);
 919
 920	if (de_is_running(de))
 921		netdev_warn(de->dev, "chip is running while changing media!\n");
 922
 923	if (de->de21040)
 924		dw32(CSR11, FULL_DUPLEX_MAGIC);
 925	dw32(CSR13, 0); /* Reset phy */
 926	dw32(CSR14, de->media[media].csr14);
 927	dw32(CSR15, de->media[media].csr15);
 928	dw32(CSR13, de->media[media].csr13);
 929
 930	/* must delay 10ms before writing to other registers,
 931	 * especially CSR6
 932	 */
 933	mdelay(10);
 934
 935	if (media == DE_MEDIA_TP_FD)
 936		macmode |= FullDuplex;
 937	else
 938		macmode &= ~FullDuplex;
 939
 940	netif_info(de, link, de->dev, "set link %s\n", media_name[media]);
 941	netif_info(de, hw, de->dev, "mode 0x%x, sia 0x%x,0x%x,0x%x,0x%x\n",
 942		   dr32(MacMode), dr32(SIAStatus),
 943		   dr32(CSR13), dr32(CSR14), dr32(CSR15));
 944	netif_info(de, hw, de->dev, "set mode 0x%x, set sia 0x%x,0x%x,0x%x\n",
 945		   macmode, de->media[media].csr13,
 946		   de->media[media].csr14, de->media[media].csr15);
 947	if (macmode != dr32(MacMode))
 948		dw32(MacMode, macmode);
 949}
 950
 951static void de_next_media (struct de_private *de, const u32 *media,
 952			   unsigned int n_media)
 953{
 954	unsigned int i;
 955
 956	for (i = 0; i < n_media; i++) {
 957		if (de_ok_to_advertise(de, media[i])) {
 958			de->media_type = media[i];
 959			return;
 960		}
 961	}
 962}
 963
 964static void de21040_media_timer (struct timer_list *t)
 965{
 966	struct de_private *de = from_timer(de, t, media_timer);
 967	struct net_device *dev = de->dev;
 968	u32 status = dr32(SIAStatus);
 969	unsigned int carrier;
 970	unsigned long flags;
 971
 972	carrier = (status & NetCxnErr) ? 0 : 1;
 973
 974	if (carrier) {
 975		if (de->media_type != DE_MEDIA_AUI && (status & LinkFailStatus))
 976			goto no_link_yet;
 977
 978		de->media_timer.expires = jiffies + DE_TIMER_LINK;
 979		add_timer(&de->media_timer);
 980		if (!netif_carrier_ok(dev))
 981			de_link_up(de);
 982		else
 983			netif_info(de, timer, dev, "%s link ok, status %x\n",
 984				   media_name[de->media_type], status);
 985		return;
 986	}
 987
 988	de_link_down(de);
 989
 990	if (de->media_lock)
 991		return;
 992
 993	if (de->media_type == DE_MEDIA_AUI) {
 994		static const u32 next_state = DE_MEDIA_TP;
 995		de_next_media(de, &next_state, 1);
 996	} else {
 997		static const u32 next_state = DE_MEDIA_AUI;
 998		de_next_media(de, &next_state, 1);
 999	}
1000
1001	spin_lock_irqsave(&de->lock, flags);
1002	de_stop_rxtx(de);
1003	spin_unlock_irqrestore(&de->lock, flags);
1004	de_set_media(de);
1005	de_start_rxtx(de);
1006
1007no_link_yet:
1008	de->media_timer.expires = jiffies + DE_TIMER_NO_LINK;
1009	add_timer(&de->media_timer);
1010
1011	netif_info(de, timer, dev, "no link, trying media %s, status %x\n",
1012		   media_name[de->media_type], status);
1013}
1014
1015static unsigned int de_ok_to_advertise (struct de_private *de, u32 new_media)
1016{
1017	switch (new_media) {
1018	case DE_MEDIA_TP_AUTO:
1019		if (!(de->media_advertise & ADVERTISED_Autoneg))
1020			return 0;
1021		if (!(de->media_advertise & (ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full)))
1022			return 0;
1023		break;
1024	case DE_MEDIA_BNC:
1025		if (!(de->media_advertise & ADVERTISED_BNC))
1026			return 0;
1027		break;
1028	case DE_MEDIA_AUI:
1029		if (!(de->media_advertise & ADVERTISED_AUI))
1030			return 0;
1031		break;
1032	case DE_MEDIA_TP:
1033		if (!(de->media_advertise & ADVERTISED_10baseT_Half))
1034			return 0;
1035		break;
1036	case DE_MEDIA_TP_FD:
1037		if (!(de->media_advertise & ADVERTISED_10baseT_Full))
1038			return 0;
1039		break;
1040	}
1041
1042	return 1;
1043}
1044
1045static void de21041_media_timer (struct timer_list *t)
1046{
1047	struct de_private *de = from_timer(de, t, media_timer);
1048	struct net_device *dev = de->dev;
1049	u32 status = dr32(SIAStatus);
1050	unsigned int carrier;
1051	unsigned long flags;
1052
1053	/* clear port active bits */
1054	dw32(SIAStatus, NonselPortActive | SelPortActive);
1055
1056	carrier = (status & NetCxnErr) ? 0 : 1;
1057
1058	if (carrier) {
1059		if ((de->media_type == DE_MEDIA_TP_AUTO ||
1060		     de->media_type == DE_MEDIA_TP ||
1061		     de->media_type == DE_MEDIA_TP_FD) &&
1062		    (status & LinkFailStatus))
1063			goto no_link_yet;
1064
1065		de->media_timer.expires = jiffies + DE_TIMER_LINK;
1066		add_timer(&de->media_timer);
1067		if (!netif_carrier_ok(dev))
1068			de_link_up(de);
1069		else
1070			netif_info(de, timer, dev,
1071				   "%s link ok, mode %x status %x\n",
1072				   media_name[de->media_type],
1073				   dr32(MacMode), status);
1074		return;
1075	}
1076
1077	de_link_down(de);
1078
1079	/* if media type locked, don't switch media */
1080	if (de->media_lock)
1081		goto set_media;
1082
1083	/* if activity detected, use that as hint for new media type */
1084	if (status & NonselPortActive) {
1085		unsigned int have_media = 1;
1086
1087		/* if AUI/BNC selected, then activity is on TP port */
1088		if (de->media_type == DE_MEDIA_AUI ||
1089		    de->media_type == DE_MEDIA_BNC) {
1090			if (de_ok_to_advertise(de, DE_MEDIA_TP_AUTO))
1091				de->media_type = DE_MEDIA_TP_AUTO;
1092			else
1093				have_media = 0;
1094		}
1095
1096		/* TP selected.  If there is only TP and BNC, then it's BNC */
1097		else if (((de->media_supported & DE_AUI_BNC) == SUPPORTED_BNC) &&
1098			 de_ok_to_advertise(de, DE_MEDIA_BNC))
1099			de->media_type = DE_MEDIA_BNC;
1100
1101		/* TP selected.  If there is only TP and AUI, then it's AUI */
1102		else if (((de->media_supported & DE_AUI_BNC) == SUPPORTED_AUI) &&
1103			 de_ok_to_advertise(de, DE_MEDIA_AUI))
1104			de->media_type = DE_MEDIA_AUI;
1105
1106		/* otherwise, ignore the hint */
1107		else
1108			have_media = 0;
1109
1110		if (have_media)
1111			goto set_media;
1112	}
1113
1114	/*
1115	 * Absent or ambiguous activity hint, move to next advertised
1116	 * media state.  If de->media_type is left unchanged, this
1117	 * simply resets the PHY and reloads the current media settings.
1118	 */
1119	if (de->media_type == DE_MEDIA_AUI) {
1120		static const u32 next_states[] = {
1121			DE_MEDIA_BNC, DE_MEDIA_TP_AUTO
1122		};
1123		de_next_media(de, next_states, ARRAY_SIZE(next_states));
1124	} else if (de->media_type == DE_MEDIA_BNC) {
1125		static const u32 next_states[] = {
1126			DE_MEDIA_TP_AUTO, DE_MEDIA_AUI
1127		};
1128		de_next_media(de, next_states, ARRAY_SIZE(next_states));
1129	} else {
1130		static const u32 next_states[] = {
1131			DE_MEDIA_AUI, DE_MEDIA_BNC, DE_MEDIA_TP_AUTO
1132		};
1133		de_next_media(de, next_states, ARRAY_SIZE(next_states));
1134	}
1135
1136set_media:
1137	spin_lock_irqsave(&de->lock, flags);
1138	de_stop_rxtx(de);
1139	spin_unlock_irqrestore(&de->lock, flags);
1140	de_set_media(de);
1141	de_start_rxtx(de);
1142
1143no_link_yet:
1144	de->media_timer.expires = jiffies + DE_TIMER_NO_LINK;
1145	add_timer(&de->media_timer);
1146
1147	netif_info(de, timer, dev, "no link, trying media %s, status %x\n",
1148		   media_name[de->media_type], status);
1149}
1150
1151static void de_media_interrupt (struct de_private *de, u32 status)
1152{
1153	if (status & LinkPass) {
1154		/* Ignore if current media is AUI or BNC and we can't use TP */
1155		if ((de->media_type == DE_MEDIA_AUI ||
1156		     de->media_type == DE_MEDIA_BNC) &&
1157		    (de->media_lock ||
1158		     !de_ok_to_advertise(de, DE_MEDIA_TP_AUTO)))
1159			return;
1160		/* If current media is not TP, change it to TP */
1161		if ((de->media_type == DE_MEDIA_AUI ||
1162		     de->media_type == DE_MEDIA_BNC)) {
1163			de->media_type = DE_MEDIA_TP_AUTO;
1164			de_stop_rxtx(de);
1165			de_set_media(de);
1166			de_start_rxtx(de);
1167		}
1168		de_link_up(de);
1169		mod_timer(&de->media_timer, jiffies + DE_TIMER_LINK);
1170		return;
1171	}
1172
1173	BUG_ON(!(status & LinkFail));
1174	/* Mark the link as down only if current media is TP */
1175	if (netif_carrier_ok(de->dev) && de->media_type != DE_MEDIA_AUI &&
1176	    de->media_type != DE_MEDIA_BNC) {
1177		de_link_down(de);
1178		mod_timer(&de->media_timer, jiffies + DE_TIMER_NO_LINK);
1179	}
1180}
1181
1182static int de_reset_mac (struct de_private *de)
1183{
1184	u32 status, tmp;
1185
1186	/*
1187	 * Reset MAC.  de4x5.c and tulip.c examined for "advice"
1188	 * in this area.
1189	 */
1190
1191	if (dr32(BusMode) == 0xffffffff)
1192		return -EBUSY;
1193
1194	/* Reset the chip, holding bit 0 set at least 50 PCI cycles. */
1195	dw32 (BusMode, CmdReset);
1196	mdelay (1);
1197
1198	dw32 (BusMode, de_bus_mode);
1199	mdelay (1);
1200
1201	for (tmp = 0; tmp < 5; tmp++) {
1202		dr32 (BusMode);
1203		mdelay (1);
1204	}
1205
1206	mdelay (1);
1207
1208	status = dr32(MacStatus);
1209	if (status & (RxState | TxState))
1210		return -EBUSY;
1211	if (status == 0xffffffff)
1212		return -ENODEV;
1213	return 0;
1214}
1215
1216static void de_adapter_wake (struct de_private *de)
1217{
1218	u32 pmctl;
1219
1220	if (de->de21040)
1221		return;
1222
1223	pci_read_config_dword(de->pdev, PCIPM, &pmctl);
1224	if (pmctl & PM_Mask) {
1225		pmctl &= ~PM_Mask;
1226		pci_write_config_dword(de->pdev, PCIPM, pmctl);
1227
1228		/* de4x5.c delays, so we do too */
1229		msleep(10);
1230	}
1231}
1232
1233static void de_adapter_sleep (struct de_private *de)
1234{
1235	u32 pmctl;
1236
1237	if (de->de21040)
1238		return;
1239
1240	dw32(CSR13, 0); /* Reset phy */
1241	pci_read_config_dword(de->pdev, PCIPM, &pmctl);
1242	pmctl |= PM_Sleep;
1243	pci_write_config_dword(de->pdev, PCIPM, pmctl);
1244}
1245
1246static int de_init_hw (struct de_private *de)
1247{
1248	struct net_device *dev = de->dev;
1249	u32 macmode;
1250	int rc;
1251
1252	de_adapter_wake(de);
1253
1254	macmode = dr32(MacMode) & ~MacModeClear;
1255
1256	rc = de_reset_mac(de);
1257	if (rc)
1258		return rc;
1259
1260	de_set_media(de); /* reset phy */
1261
1262	dw32(RxRingAddr, de->ring_dma);
1263	dw32(TxRingAddr, de->ring_dma + (sizeof(struct de_desc) * DE_RX_RING_SIZE));
1264
1265	dw32(MacMode, RxTx | macmode);
1266
1267	dr32(RxMissed); /* self-clearing */
1268
1269	dw32(IntrMask, de_intr_mask);
1270
1271	de_set_rx_mode(dev);
1272
1273	return 0;
1274}
1275
1276static int de_refill_rx (struct de_private *de)
1277{
1278	unsigned i;
1279
1280	for (i = 0; i < DE_RX_RING_SIZE; i++) {
1281		struct sk_buff *skb;
1282
1283		skb = netdev_alloc_skb(de->dev, de->rx_buf_sz);
1284		if (!skb)
1285			goto err_out;
1286
1287		de->rx_skb[i].mapping = dma_map_single(&de->pdev->dev,
1288						       skb->data,
1289						       de->rx_buf_sz,
1290						       DMA_FROM_DEVICE);
1291		de->rx_skb[i].skb = skb;
1292
1293		de->rx_ring[i].opts1 = cpu_to_le32(DescOwn);
1294		if (i == (DE_RX_RING_SIZE - 1))
1295			de->rx_ring[i].opts2 =
1296				cpu_to_le32(RingEnd | de->rx_buf_sz);
1297		else
1298			de->rx_ring[i].opts2 = cpu_to_le32(de->rx_buf_sz);
1299		de->rx_ring[i].addr1 = cpu_to_le32(de->rx_skb[i].mapping);
1300		de->rx_ring[i].addr2 = 0;
1301	}
1302
1303	return 0;
1304
1305err_out:
1306	de_clean_rings(de);
1307	return -ENOMEM;
1308}
1309
1310static int de_init_rings (struct de_private *de)
1311{
1312	memset(de->tx_ring, 0, sizeof(struct de_desc) * DE_TX_RING_SIZE);
1313	de->tx_ring[DE_TX_RING_SIZE - 1].opts2 = cpu_to_le32(RingEnd);
1314
1315	de->rx_tail = 0;
1316	de->tx_head = de->tx_tail = 0;
1317
1318	return de_refill_rx (de);
1319}
1320
1321static int de_alloc_rings (struct de_private *de)
1322{
1323	de->rx_ring = dma_alloc_coherent(&de->pdev->dev, DE_RING_BYTES,
1324					 &de->ring_dma, GFP_KERNEL);
1325	if (!de->rx_ring)
1326		return -ENOMEM;
1327	de->tx_ring = &de->rx_ring[DE_RX_RING_SIZE];
1328	return de_init_rings(de);
1329}
1330
1331static void de_clean_rings (struct de_private *de)
1332{
1333	unsigned i;
1334
1335	memset(de->rx_ring, 0, sizeof(struct de_desc) * DE_RX_RING_SIZE);
1336	de->rx_ring[DE_RX_RING_SIZE - 1].opts2 = cpu_to_le32(RingEnd);
1337	wmb();
1338	memset(de->tx_ring, 0, sizeof(struct de_desc) * DE_TX_RING_SIZE);
1339	de->tx_ring[DE_TX_RING_SIZE - 1].opts2 = cpu_to_le32(RingEnd);
1340	wmb();
1341
1342	for (i = 0; i < DE_RX_RING_SIZE; i++) {
1343		if (de->rx_skb[i].skb) {
1344			dma_unmap_single(&de->pdev->dev,
1345					 de->rx_skb[i].mapping, de->rx_buf_sz,
1346					 DMA_FROM_DEVICE);
1347			dev_kfree_skb(de->rx_skb[i].skb);
1348		}
1349	}
1350
1351	for (i = 0; i < DE_TX_RING_SIZE; i++) {
1352		struct sk_buff *skb = de->tx_skb[i].skb;
1353		if ((skb) && (skb != DE_DUMMY_SKB)) {
1354			if (skb != DE_SETUP_SKB) {
1355				de->dev->stats.tx_dropped++;
1356				dma_unmap_single(&de->pdev->dev,
1357						 de->tx_skb[i].mapping,
1358						 skb->len, DMA_TO_DEVICE);
1359				dev_kfree_skb(skb);
1360			} else {
1361				dma_unmap_single(&de->pdev->dev,
1362						 de->tx_skb[i].mapping,
1363						 sizeof(de->setup_frame),
1364						 DMA_TO_DEVICE);
1365			}
1366		}
1367	}
1368
1369	memset(&de->rx_skb, 0, sizeof(struct ring_info) * DE_RX_RING_SIZE);
1370	memset(&de->tx_skb, 0, sizeof(struct ring_info) * DE_TX_RING_SIZE);
1371}
1372
1373static void de_free_rings (struct de_private *de)
1374{
1375	de_clean_rings(de);
1376	dma_free_coherent(&de->pdev->dev, DE_RING_BYTES, de->rx_ring,
1377			  de->ring_dma);
1378	de->rx_ring = NULL;
1379	de->tx_ring = NULL;
1380}
1381
1382static int de_open (struct net_device *dev)
1383{
1384	struct de_private *de = netdev_priv(dev);
1385	const int irq = de->pdev->irq;
1386	int rc;
1387
1388	netif_dbg(de, ifup, dev, "enabling interface\n");
1389
1390	de->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
1391
1392	rc = de_alloc_rings(de);
1393	if (rc) {
1394		netdev_err(dev, "ring allocation failure, err=%d\n", rc);
1395		return rc;
1396	}
1397
1398	dw32(IntrMask, 0);
1399
1400	rc = request_irq(irq, de_interrupt, IRQF_SHARED, dev->name, dev);
1401	if (rc) {
1402		netdev_err(dev, "IRQ %d request failure, err=%d\n", irq, rc);
1403		goto err_out_free;
1404	}
1405
1406	rc = de_init_hw(de);
1407	if (rc) {
1408		netdev_err(dev, "h/w init failure, err=%d\n", rc);
1409		goto err_out_free_irq;
1410	}
1411
1412	netif_start_queue(dev);
1413	mod_timer(&de->media_timer, jiffies + DE_TIMER_NO_LINK);
1414
1415	return 0;
1416
1417err_out_free_irq:
1418	free_irq(irq, dev);
1419err_out_free:
1420	de_free_rings(de);
1421	return rc;
1422}
1423
1424static int de_close (struct net_device *dev)
1425{
1426	struct de_private *de = netdev_priv(dev);
1427	unsigned long flags;
1428
1429	netif_dbg(de, ifdown, dev, "disabling interface\n");
1430
1431	del_timer_sync(&de->media_timer);
1432
1433	spin_lock_irqsave(&de->lock, flags);
1434	de_stop_hw(de);
1435	netif_stop_queue(dev);
1436	netif_carrier_off(dev);
1437	spin_unlock_irqrestore(&de->lock, flags);
1438
1439	free_irq(de->pdev->irq, dev);
1440
1441	de_free_rings(de);
1442	de_adapter_sleep(de);
1443	return 0;
1444}
1445
1446static void de_tx_timeout (struct net_device *dev, unsigned int txqueue)
1447{
1448	struct de_private *de = netdev_priv(dev);
1449	const int irq = de->pdev->irq;
1450
1451	netdev_dbg(dev, "NIC status %08x mode %08x sia %08x desc %u/%u/%u\n",
1452		   dr32(MacStatus), dr32(MacMode), dr32(SIAStatus),
1453		   de->rx_tail, de->tx_head, de->tx_tail);
1454
1455	del_timer_sync(&de->media_timer);
1456
1457	disable_irq(irq);
1458	spin_lock_irq(&de->lock);
1459
1460	de_stop_hw(de);
1461	netif_stop_queue(dev);
1462	netif_carrier_off(dev);
1463
1464	spin_unlock_irq(&de->lock);
1465	enable_irq(irq);
1466
1467	/* Update the error counts. */
1468	__de_get_stats(de);
1469
1470	synchronize_irq(irq);
1471	de_clean_rings(de);
1472
1473	de_init_rings(de);
1474
1475	de_init_hw(de);
1476
1477	netif_wake_queue(dev);
1478}
1479
1480static void __de_get_regs(struct de_private *de, u8 *buf)
1481{
1482	int i;
1483	u32 *rbuf = (u32 *)buf;
1484
1485	/* read all CSRs */
1486	for (i = 0; i < DE_NUM_REGS; i++)
1487		rbuf[i] = dr32(i * 8);
1488
1489	/* handle self-clearing RxMissed counter, CSR8 */
1490	de_rx_missed(de, rbuf[8]);
1491}
1492
1493static void __de_get_link_ksettings(struct de_private *de,
1494				    struct ethtool_link_ksettings *cmd)
1495{
1496	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1497						de->media_supported);
1498	cmd->base.phy_address = 0;
1499	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1500						de->media_advertise);
1501
1502	switch (de->media_type) {
1503	case DE_MEDIA_AUI:
1504		cmd->base.port = PORT_AUI;
1505		break;
1506	case DE_MEDIA_BNC:
1507		cmd->base.port = PORT_BNC;
1508		break;
1509	default:
1510		cmd->base.port = PORT_TP;
1511		break;
1512	}
1513
1514	cmd->base.speed = 10;
1515
1516	if (dr32(MacMode) & FullDuplex)
1517		cmd->base.duplex = DUPLEX_FULL;
1518	else
1519		cmd->base.duplex = DUPLEX_HALF;
1520
1521	if (de->media_lock)
1522		cmd->base.autoneg = AUTONEG_DISABLE;
1523	else
1524		cmd->base.autoneg = AUTONEG_ENABLE;
1525
1526	/* ignore maxtxpkt, maxrxpkt for now */
1527}
1528
1529static int __de_set_link_ksettings(struct de_private *de,
1530				   const struct ethtool_link_ksettings *cmd)
1531{
1532	u32 new_media;
1533	unsigned int media_lock;
1534	u8 duplex = cmd->base.duplex;
1535	u8 port = cmd->base.port;
1536	u8 autoneg = cmd->base.autoneg;
1537	u32 advertising;
1538
1539	ethtool_convert_link_mode_to_legacy_u32(&advertising,
1540						cmd->link_modes.advertising);
1541
1542	if (cmd->base.speed != 10)
1543		return -EINVAL;
1544	if (duplex != DUPLEX_HALF && duplex != DUPLEX_FULL)
1545		return -EINVAL;
1546	if (port != PORT_TP && port != PORT_AUI && port != PORT_BNC)
1547		return -EINVAL;
1548	if (de->de21040 && port == PORT_BNC)
1549		return -EINVAL;
1550	if (autoneg != AUTONEG_DISABLE && autoneg != AUTONEG_ENABLE)
1551		return -EINVAL;
1552	if (advertising & ~de->media_supported)
1553		return -EINVAL;
1554	if (autoneg == AUTONEG_ENABLE &&
1555	    (!(advertising & ADVERTISED_Autoneg)))
1556		return -EINVAL;
1557
1558	switch (port) {
1559	case PORT_AUI:
1560		new_media = DE_MEDIA_AUI;
1561		if (!(advertising & ADVERTISED_AUI))
1562			return -EINVAL;
1563		break;
1564	case PORT_BNC:
1565		new_media = DE_MEDIA_BNC;
1566		if (!(advertising & ADVERTISED_BNC))
1567			return -EINVAL;
1568		break;
1569	default:
1570		if (autoneg == AUTONEG_ENABLE)
1571			new_media = DE_MEDIA_TP_AUTO;
1572		else if (duplex == DUPLEX_FULL)
1573			new_media = DE_MEDIA_TP_FD;
1574		else
1575			new_media = DE_MEDIA_TP;
1576		if (!(advertising & ADVERTISED_TP))
1577			return -EINVAL;
1578		if (!(advertising & (ADVERTISED_10baseT_Full |
1579				     ADVERTISED_10baseT_Half)))
1580			return -EINVAL;
1581		break;
1582	}
1583
1584	media_lock = (autoneg == AUTONEG_ENABLE) ? 0 : 1;
1585
1586	if ((new_media == de->media_type) &&
1587	    (media_lock == de->media_lock) &&
1588	    (advertising == de->media_advertise))
1589		return 0; /* nothing to change */
1590
1591	de_link_down(de);
1592	mod_timer(&de->media_timer, jiffies + DE_TIMER_NO_LINK);
1593	de_stop_rxtx(de);
1594
1595	de->media_type = new_media;
1596	de->media_lock = media_lock;
1597	de->media_advertise = advertising;
1598	de_set_media(de);
1599	if (netif_running(de->dev))
1600		de_start_rxtx(de);
1601
1602	return 0;
1603}
1604
1605static void de_get_drvinfo (struct net_device *dev,struct ethtool_drvinfo *info)
1606{
1607	struct de_private *de = netdev_priv(dev);
1608
1609	strscpy(info->driver, DRV_NAME, sizeof(info->driver));
1610	strscpy(info->bus_info, pci_name(de->pdev), sizeof(info->bus_info));
1611}
1612
1613static int de_get_regs_len(struct net_device *dev)
1614{
1615	return DE_REGS_SIZE;
1616}
1617
1618static int de_get_link_ksettings(struct net_device *dev,
1619				 struct ethtool_link_ksettings *cmd)
1620{
1621	struct de_private *de = netdev_priv(dev);
1622
1623	spin_lock_irq(&de->lock);
1624	__de_get_link_ksettings(de, cmd);
1625	spin_unlock_irq(&de->lock);
1626
1627	return 0;
1628}
1629
1630static int de_set_link_ksettings(struct net_device *dev,
1631				 const struct ethtool_link_ksettings *cmd)
1632{
1633	struct de_private *de = netdev_priv(dev);
1634	int rc;
1635
1636	spin_lock_irq(&de->lock);
1637	rc = __de_set_link_ksettings(de, cmd);
1638	spin_unlock_irq(&de->lock);
1639
1640	return rc;
1641}
1642
1643static u32 de_get_msglevel(struct net_device *dev)
1644{
1645	struct de_private *de = netdev_priv(dev);
1646
1647	return de->msg_enable;
1648}
1649
1650static void de_set_msglevel(struct net_device *dev, u32 msglvl)
1651{
1652	struct de_private *de = netdev_priv(dev);
1653
1654	de->msg_enable = msglvl;
1655}
1656
1657static int de_get_eeprom(struct net_device *dev,
1658			 struct ethtool_eeprom *eeprom, u8 *data)
1659{
1660	struct de_private *de = netdev_priv(dev);
1661
1662	if (!de->ee_data)
1663		return -EOPNOTSUPP;
1664	if ((eeprom->offset != 0) || (eeprom->magic != 0) ||
1665	    (eeprom->len != DE_EEPROM_SIZE))
1666		return -EINVAL;
1667	memcpy(data, de->ee_data, eeprom->len);
1668
1669	return 0;
1670}
1671
1672static int de_nway_reset(struct net_device *dev)
1673{
1674	struct de_private *de = netdev_priv(dev);
1675	u32 status;
1676
1677	if (de->media_type != DE_MEDIA_TP_AUTO)
1678		return -EINVAL;
1679	if (netif_carrier_ok(de->dev))
1680		de_link_down(de);
1681
1682	status = dr32(SIAStatus);
1683	dw32(SIAStatus, (status & ~NWayState) | NWayRestart);
1684	netif_info(de, link, dev, "link nway restart, status %x,%x\n",
1685		   status, dr32(SIAStatus));
1686	return 0;
1687}
1688
1689static void de_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1690			void *data)
1691{
1692	struct de_private *de = netdev_priv(dev);
1693
1694	regs->version = (DE_REGS_VER << 2) | de->de21040;
1695
1696	spin_lock_irq(&de->lock);
1697	__de_get_regs(de, data);
1698	spin_unlock_irq(&de->lock);
1699}
1700
1701static const struct ethtool_ops de_ethtool_ops = {
1702	.get_link		= ethtool_op_get_link,
1703	.get_drvinfo		= de_get_drvinfo,
1704	.get_regs_len		= de_get_regs_len,
1705	.get_msglevel		= de_get_msglevel,
1706	.set_msglevel		= de_set_msglevel,
1707	.get_eeprom		= de_get_eeprom,
1708	.nway_reset		= de_nway_reset,
1709	.get_regs		= de_get_regs,
1710	.get_link_ksettings	= de_get_link_ksettings,
1711	.set_link_ksettings	= de_set_link_ksettings,
1712};
1713
1714static void de21040_get_mac_address(struct de_private *de)
1715{
1716	u8 addr[ETH_ALEN];
1717	unsigned i;
1718
1719	dw32 (ROMCmd, 0);	/* Reset the pointer with a dummy write. */
1720	udelay(5);
1721
1722	for (i = 0; i < 6; i++) {
1723		int value, boguscnt = 100000;
1724		do {
1725			value = dr32(ROMCmd);
1726			rmb();
1727		} while (value < 0 && --boguscnt > 0);
1728		addr[i] = value;
1729		udelay(1);
1730		if (boguscnt <= 0)
1731			pr_warn("timeout reading 21040 MAC address byte %u\n",
1732				i);
1733	}
1734	eth_hw_addr_set(de->dev, addr);
1735}
1736
1737static void de21040_get_media_info(struct de_private *de)
1738{
1739	unsigned int i;
1740
1741	de->media_type = DE_MEDIA_TP;
1742	de->media_supported |= SUPPORTED_TP | SUPPORTED_10baseT_Full |
1743			       SUPPORTED_10baseT_Half | SUPPORTED_AUI;
1744	de->media_advertise = de->media_supported;
1745
1746	for (i = 0; i < DE_MAX_MEDIA; i++) {
1747		switch (i) {
1748		case DE_MEDIA_AUI:
1749		case DE_MEDIA_TP:
1750		case DE_MEDIA_TP_FD:
1751			de->media[i].type = i;
1752			de->media[i].csr13 = t21040_csr13[i];
1753			de->media[i].csr14 = t21040_csr14[i];
1754			de->media[i].csr15 = t21040_csr15[i];
1755			break;
1756		default:
1757			de->media[i].type = DE_MEDIA_INVALID;
1758			break;
1759		}
1760	}
1761}
1762
1763/* Note: this routine returns extra data bits for size detection. */
1764static unsigned tulip_read_eeprom(void __iomem *regs, int location,
1765				  int addr_len)
1766{
1767	int i;
1768	unsigned retval = 0;
1769	void __iomem *ee_addr = regs + ROMCmd;
1770	int read_cmd = location | (EE_READ_CMD << addr_len);
1771
1772	writel(EE_ENB & ~EE_CS, ee_addr);
1773	writel(EE_ENB, ee_addr);
1774
1775	/* Shift the read command bits out. */
1776	for (i = 4 + addr_len; i >= 0; i--) {
1777		short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
1778		writel(EE_ENB | dataval, ee_addr);
1779		readl(ee_addr);
1780		writel(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
1781		readl(ee_addr);
1782		retval = (retval << 1) | ((readl(ee_addr) & EE_DATA_READ) ? 1 : 0);
1783	}
1784	writel(EE_ENB, ee_addr);
1785	readl(ee_addr);
1786
1787	for (i = 16; i > 0; i--) {
1788		writel(EE_ENB | EE_SHIFT_CLK, ee_addr);
1789		readl(ee_addr);
1790		retval = (retval << 1) | ((readl(ee_addr) & EE_DATA_READ) ? 1 : 0);
1791		writel(EE_ENB, ee_addr);
1792		readl(ee_addr);
1793	}
1794
1795	/* Terminate the EEPROM access. */
1796	writel(EE_ENB & ~EE_CS, ee_addr);
1797	return retval;
1798}
1799
1800static void de21041_get_srom_info(struct de_private *de)
1801{
1802	unsigned i, sa_offset = 0, ofs;
1803	u8 ee_data[DE_EEPROM_SIZE + 6] = {};
1804	unsigned ee_addr_size = tulip_read_eeprom(de->regs, 0xff, 8) & 0x40000 ? 8 : 6;
1805	struct de_srom_info_leaf *il;
1806	void *bufp;
1807
1808	/* download entire eeprom */
1809	for (i = 0; i < DE_EEPROM_WORDS; i++)
1810		((__le16 *)ee_data)[i] =
1811			cpu_to_le16(tulip_read_eeprom(de->regs, i, ee_addr_size));
1812
1813	/* DEC now has a specification but early board makers
1814	   just put the address in the first EEPROM locations. */
1815	/* This does  memcmp(eedata, eedata+16, 8) */
1816
1817#ifndef CONFIG_MIPS_COBALT
1818
1819	for (i = 0; i < 8; i ++)
1820		if (ee_data[i] != ee_data[16+i])
1821			sa_offset = 20;
1822
1823#endif
1824
1825	/* store MAC address */
1826	eth_hw_addr_set(de->dev, &ee_data[sa_offset]);
 
1827
1828	/* get offset of controller 0 info leaf.  ignore 2nd byte. */
1829	ofs = ee_data[SROMC0InfoLeaf];
1830	if (ofs >= (sizeof(ee_data) - sizeof(struct de_srom_info_leaf) - sizeof(struct de_srom_media_block)))
1831		goto bad_srom;
1832
1833	/* get pointer to info leaf */
1834	il = (struct de_srom_info_leaf *) &ee_data[ofs];
1835
1836	/* paranoia checks */
1837	if (il->n_blocks == 0)
1838		goto bad_srom;
1839	if ((sizeof(ee_data) - ofs) <
1840	    (sizeof(struct de_srom_info_leaf) + (sizeof(struct de_srom_media_block) * il->n_blocks)))
1841		goto bad_srom;
1842
1843	/* get default media type */
1844	switch (get_unaligned(&il->default_media)) {
1845	case 0x0001:  de->media_type = DE_MEDIA_BNC; break;
1846	case 0x0002:  de->media_type = DE_MEDIA_AUI; break;
1847	case 0x0204:  de->media_type = DE_MEDIA_TP_FD; break;
1848	default: de->media_type = DE_MEDIA_TP_AUTO; break;
1849	}
1850
1851	if (netif_msg_probe(de))
1852		pr_info("de%d: SROM leaf offset %u, default media %s\n",
1853		       de->board_idx, ofs, media_name[de->media_type]);
1854
1855	/* init SIA register values to defaults */
1856	for (i = 0; i < DE_MAX_MEDIA; i++) {
1857		de->media[i].type = DE_MEDIA_INVALID;
1858		de->media[i].csr13 = 0xffff;
1859		de->media[i].csr14 = 0xffff;
1860		de->media[i].csr15 = 0xffff;
1861	}
1862
1863	/* parse media blocks to see what medias are supported,
1864	 * and if any custom CSR values are provided
1865	 */
1866	bufp = ((void *)il) + sizeof(*il);
1867	for (i = 0; i < il->n_blocks; i++) {
1868		struct de_srom_media_block *ib = bufp;
1869		unsigned idx;
1870
1871		/* index based on media type in media block */
1872		switch(ib->opts & MediaBlockMask) {
1873		case 0: /* 10baseT */
1874			de->media_supported |= SUPPORTED_TP | SUPPORTED_10baseT_Half
1875					  | SUPPORTED_Autoneg;
1876			idx = DE_MEDIA_TP;
1877			de->media[DE_MEDIA_TP_AUTO].type = DE_MEDIA_TP_AUTO;
1878			break;
1879		case 1: /* BNC */
1880			de->media_supported |= SUPPORTED_BNC;
1881			idx = DE_MEDIA_BNC;
1882			break;
1883		case 2: /* AUI */
1884			de->media_supported |= SUPPORTED_AUI;
1885			idx = DE_MEDIA_AUI;
1886			break;
1887		case 4: /* 10baseT-FD */
1888			de->media_supported |= SUPPORTED_TP | SUPPORTED_10baseT_Full
1889					  | SUPPORTED_Autoneg;
1890			idx = DE_MEDIA_TP_FD;
1891			de->media[DE_MEDIA_TP_AUTO].type = DE_MEDIA_TP_AUTO;
1892			break;
1893		default:
1894			goto bad_srom;
1895		}
1896
1897		de->media[idx].type = idx;
1898
1899		if (netif_msg_probe(de))
1900			pr_info("de%d:   media block #%u: %s",
1901				de->board_idx, i,
1902				media_name[de->media[idx].type]);
1903
1904		bufp += sizeof (ib->opts);
1905
1906		if (ib->opts & MediaCustomCSRs) {
1907			de->media[idx].csr13 = get_unaligned(&ib->csr13);
1908			de->media[idx].csr14 = get_unaligned(&ib->csr14);
1909			de->media[idx].csr15 = get_unaligned(&ib->csr15);
1910			bufp += sizeof(ib->csr13) + sizeof(ib->csr14) +
1911				sizeof(ib->csr15);
1912
1913			if (netif_msg_probe(de))
1914				pr_cont(" (%x,%x,%x)\n",
1915					de->media[idx].csr13,
1916					de->media[idx].csr14,
1917					de->media[idx].csr15);
1918
1919		} else {
1920			if (netif_msg_probe(de))
1921				pr_cont("\n");
1922		}
1923
1924		if (bufp > ((void *)&ee_data[DE_EEPROM_SIZE - 3]))
1925			break;
1926	}
1927
1928	de->media_advertise = de->media_supported;
1929
1930fill_defaults:
1931	/* fill in defaults, for cases where custom CSRs not used */
1932	for (i = 0; i < DE_MAX_MEDIA; i++) {
1933		if (de->media[i].csr13 == 0xffff)
1934			de->media[i].csr13 = t21041_csr13[i];
1935		if (de->media[i].csr14 == 0xffff) {
1936			/* autonegotiation is broken at least on some chip
1937			   revisions - rev. 0x21 works, 0x11 does not */
1938			if (de->pdev->revision < 0x20)
1939				de->media[i].csr14 = t21041_csr14_brk[i];
1940			else
1941				de->media[i].csr14 = t21041_csr14[i];
1942		}
1943		if (de->media[i].csr15 == 0xffff)
1944			de->media[i].csr15 = t21041_csr15[i];
1945	}
1946
1947	de->ee_data = kmemdup(&ee_data[0], DE_EEPROM_SIZE, GFP_KERNEL);
1948
1949	return;
1950
1951bad_srom:
1952	/* for error cases, it's ok to assume we support all these */
1953	for (i = 0; i < DE_MAX_MEDIA; i++)
1954		de->media[i].type = i;
1955	de->media_supported =
1956		SUPPORTED_10baseT_Half |
1957		SUPPORTED_10baseT_Full |
1958		SUPPORTED_Autoneg |
1959		SUPPORTED_TP |
1960		SUPPORTED_AUI |
1961		SUPPORTED_BNC;
1962	goto fill_defaults;
1963}
1964
1965static const struct net_device_ops de_netdev_ops = {
1966	.ndo_open		= de_open,
1967	.ndo_stop		= de_close,
1968	.ndo_set_rx_mode	= de_set_rx_mode,
1969	.ndo_start_xmit		= de_start_xmit,
1970	.ndo_get_stats		= de_get_stats,
1971	.ndo_tx_timeout 	= de_tx_timeout,
1972	.ndo_set_mac_address 	= eth_mac_addr,
1973	.ndo_validate_addr	= eth_validate_addr,
1974};
1975
1976static int de_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1977{
1978	struct net_device *dev;
1979	struct de_private *de;
1980	int rc;
1981	void __iomem *regs;
1982	unsigned long pciaddr;
1983	static int board_idx = -1;
1984
1985	board_idx++;
1986
1987	/* allocate a new ethernet device structure, and fill in defaults */
1988	dev = alloc_etherdev(sizeof(struct de_private));
1989	if (!dev)
1990		return -ENOMEM;
1991
1992	dev->netdev_ops = &de_netdev_ops;
1993	SET_NETDEV_DEV(dev, &pdev->dev);
1994	dev->ethtool_ops = &de_ethtool_ops;
1995	dev->watchdog_timeo = TX_TIMEOUT;
1996
1997	de = netdev_priv(dev);
1998	de->de21040 = ent->driver_data == 0 ? 1 : 0;
1999	de->pdev = pdev;
2000	de->dev = dev;
2001	de->msg_enable = (debug < 0 ? DE_DEF_MSG_ENABLE : debug);
2002	de->board_idx = board_idx;
2003	spin_lock_init (&de->lock);
2004	timer_setup(&de->media_timer,
2005		    de->de21040 ? de21040_media_timer : de21041_media_timer,
2006		    0);
2007
2008	netif_carrier_off(dev);
2009
2010	/* wake up device, assign resources */
2011	rc = pci_enable_device(pdev);
2012	if (rc)
2013		goto err_out_free;
2014
2015	/* reserve PCI resources to ensure driver atomicity */
2016	rc = pci_request_regions(pdev, DRV_NAME);
2017	if (rc)
2018		goto err_out_disable;
2019
2020	/* check for invalid IRQ value */
2021	if (pdev->irq < 2) {
2022		rc = -EIO;
2023		pr_err("invalid irq (%d) for pci dev %s\n",
2024		       pdev->irq, pci_name(pdev));
2025		goto err_out_res;
2026	}
2027
2028	/* obtain and check validity of PCI I/O address */
2029	pciaddr = pci_resource_start(pdev, 1);
2030	if (!pciaddr) {
2031		rc = -EIO;
2032		pr_err("no MMIO resource for pci dev %s\n", pci_name(pdev));
2033		goto err_out_res;
2034	}
2035	if (pci_resource_len(pdev, 1) < DE_REGS_SIZE) {
2036		rc = -EIO;
2037		pr_err("MMIO resource (%llx) too small on pci dev %s\n",
2038		       (unsigned long long)pci_resource_len(pdev, 1),
2039		       pci_name(pdev));
2040		goto err_out_res;
2041	}
2042
2043	/* remap CSR registers */
2044	regs = ioremap(pciaddr, DE_REGS_SIZE);
2045	if (!regs) {
2046		rc = -EIO;
2047		pr_err("Cannot map PCI MMIO (%llx@%lx) on pci dev %s\n",
2048		       (unsigned long long)pci_resource_len(pdev, 1),
2049		       pciaddr, pci_name(pdev));
2050		goto err_out_res;
2051	}
2052	de->regs = regs;
2053
2054	de_adapter_wake(de);
2055
2056	/* make sure hardware is not running */
2057	rc = de_reset_mac(de);
2058	if (rc) {
2059		pr_err("Cannot reset MAC, pci dev %s\n", pci_name(pdev));
2060		goto err_out_iomap;
2061	}
2062
2063	/* get MAC address, initialize default media type and
2064	 * get list of supported media
2065	 */
2066	if (de->de21040) {
2067		de21040_get_mac_address(de);
2068		de21040_get_media_info(de);
2069	} else {
2070		de21041_get_srom_info(de);
2071	}
2072
2073	/* register new network interface with kernel */
2074	rc = register_netdev(dev);
2075	if (rc)
2076		goto err_out_iomap;
2077
2078	/* print info about board and interface just registered */
2079	netdev_info(dev, "%s at %p, %pM, IRQ %d\n",
2080		    de->de21040 ? "21040" : "21041",
2081		    regs, dev->dev_addr, pdev->irq);
2082
2083	pci_set_drvdata(pdev, dev);
2084
2085	/* enable busmastering */
2086	pci_set_master(pdev);
2087
2088	/* put adapter to sleep */
2089	de_adapter_sleep(de);
2090
2091	return 0;
2092
2093err_out_iomap:
2094	kfree(de->ee_data);
2095	iounmap(regs);
2096err_out_res:
2097	pci_release_regions(pdev);
2098err_out_disable:
2099	pci_disable_device(pdev);
2100err_out_free:
2101	free_netdev(dev);
2102	return rc;
2103}
2104
2105static void de_remove_one(struct pci_dev *pdev)
2106{
2107	struct net_device *dev = pci_get_drvdata(pdev);
2108	struct de_private *de = netdev_priv(dev);
2109
2110	BUG_ON(!dev);
2111	unregister_netdev(dev);
2112	kfree(de->ee_data);
2113	iounmap(de->regs);
2114	pci_release_regions(pdev);
2115	pci_disable_device(pdev);
2116	free_netdev(dev);
2117}
2118
2119static int __maybe_unused de_suspend(struct device *dev_d)
2120{
2121	struct pci_dev *pdev = to_pci_dev(dev_d);
2122	struct net_device *dev = pci_get_drvdata(pdev);
2123	struct de_private *de = netdev_priv(dev);
2124
2125	rtnl_lock();
2126	if (netif_running (dev)) {
2127		const int irq = pdev->irq;
2128
2129		del_timer_sync(&de->media_timer);
2130
2131		disable_irq(irq);
2132		spin_lock_irq(&de->lock);
2133
2134		de_stop_hw(de);
2135		netif_stop_queue(dev);
2136		netif_device_detach(dev);
2137		netif_carrier_off(dev);
2138
2139		spin_unlock_irq(&de->lock);
2140		enable_irq(irq);
2141
2142		/* Update the error counts. */
2143		__de_get_stats(de);
2144
2145		synchronize_irq(irq);
2146		de_clean_rings(de);
2147
2148		de_adapter_sleep(de);
2149	} else {
2150		netif_device_detach(dev);
2151	}
2152	rtnl_unlock();
2153	return 0;
2154}
2155
2156static int __maybe_unused de_resume(struct device *dev_d)
2157{
2158	struct pci_dev *pdev = to_pci_dev(dev_d);
2159	struct net_device *dev = pci_get_drvdata(pdev);
2160	struct de_private *de = netdev_priv(dev);
2161
2162	rtnl_lock();
2163	if (netif_device_present(dev))
2164		goto out;
2165	if (!netif_running(dev))
2166		goto out_attach;
2167	pci_set_master(pdev);
2168	de_init_rings(de);
2169	de_init_hw(de);
2170out_attach:
2171	netif_device_attach(dev);
2172out:
2173	rtnl_unlock();
2174	return 0;
2175}
2176
2177static SIMPLE_DEV_PM_OPS(de_pm_ops, de_suspend, de_resume);
2178
2179static void de_shutdown(struct pci_dev *pdev)
2180{
2181	struct net_device *dev = pci_get_drvdata(pdev);
2182
2183	rtnl_lock();
2184	dev_close(dev);
2185	rtnl_unlock();
2186}
2187
2188static struct pci_driver de_driver = {
2189	.name		= DRV_NAME,
2190	.id_table	= de_pci_tbl,
2191	.probe		= de_init_one,
2192	.remove		= de_remove_one,
2193	.shutdown	= de_shutdown,
2194	.driver.pm	= &de_pm_ops,
2195};
2196
2197module_pci_driver(de_driver);