1/* b44.c: Broadcom 44xx/47xx Fast Ethernet device driver.
   2 *
   3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
   4 * Copyright (C) 2004 Pekka Pietikainen (pp@ee.oulu.fi)
   5 * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
   6 * Copyright (C) 2006 Felix Fietkau (nbd@openwrt.org)
   7 * Copyright (C) 2006 Broadcom Corporation.
   8 * Copyright (C) 2007 Michael Buesch <m@bues.ch>
   9 * Copyright (C) 2013 Hauke Mehrtens <hauke@hauke-m.de>
  10 *
  11 * Distribute under GPL.
  12 */
  13
  14#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  15
  16#include <linux/kernel.h>
  17#include <linux/module.h>
  18#include <linux/moduleparam.h>
  19#include <linux/types.h>
  20#include <linux/netdevice.h>
  21#include <linux/ethtool.h>
  22#include <linux/mii.h>
  23#include <linux/if_ether.h>
  24#include <linux/if_vlan.h>
  25#include <linux/etherdevice.h>
  26#include <linux/pci.h>
  27#include <linux/delay.h>
  28#include <linux/init.h>
  29#include <linux/interrupt.h>
  30#include <linux/dma-mapping.h>
  31#include <linux/ssb/ssb.h>
  32#include <linux/slab.h>
  33#include <linux/phy.h>
  34
  35#include <linux/uaccess.h>
  36#include <asm/io.h>
  37#include <asm/irq.h>
  38
  39
  40#include "b44.h"
  41
  42#define DRV_MODULE_NAME		"b44"
  43#define DRV_DESCRIPTION		"Broadcom 44xx/47xx 10/100 PCI ethernet driver"
  44
  45#define B44_DEF_MSG_ENABLE	  \
  46	(NETIF_MSG_DRV		| \
  47	 NETIF_MSG_PROBE	| \
  48	 NETIF_MSG_LINK		| \
  49	 NETIF_MSG_TIMER	| \
  50	 NETIF_MSG_IFDOWN	| \
  51	 NETIF_MSG_IFUP		| \
  52	 NETIF_MSG_RX_ERR	| \
  53	 NETIF_MSG_TX_ERR)
  54
  55/* length of time before we decide the hardware is borked,
  56 * and dev->tx_timeout() should be called to fix the problem
  57 */
  58#define B44_TX_TIMEOUT			(5 * HZ)
  59
  60/* hardware minimum and maximum for a single frame's data payload */
  61#define B44_MIN_MTU			ETH_ZLEN
  62#define B44_MAX_MTU			ETH_DATA_LEN
  63
  64#define B44_RX_RING_SIZE		512
  65#define B44_DEF_RX_RING_PENDING		200
  66#define B44_RX_RING_BYTES	(sizeof(struct dma_desc) * \
  67				 B44_RX_RING_SIZE)
  68#define B44_TX_RING_SIZE		512
  69#define B44_DEF_TX_RING_PENDING		(B44_TX_RING_SIZE - 1)
  70#define B44_TX_RING_BYTES	(sizeof(struct dma_desc) * \
  71				 B44_TX_RING_SIZE)
  72
  73#define TX_RING_GAP(BP)	\
  74	(B44_TX_RING_SIZE - (BP)->tx_pending)
  75#define TX_BUFFS_AVAIL(BP)						\
  76	(((BP)->tx_cons <= (BP)->tx_prod) ?				\
  77	  (BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod :		\
  78	  (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP))
  79#define NEXT_TX(N)		(((N) + 1) & (B44_TX_RING_SIZE - 1))
  80
  81#define RX_PKT_OFFSET		(RX_HEADER_LEN + 2)
  82#define RX_PKT_BUF_SZ		(1536 + RX_PKT_OFFSET)
  83
  84/* minimum number of free TX descriptors required to wake up TX process */
  85#define B44_TX_WAKEUP_THRESH		(B44_TX_RING_SIZE / 4)
  86
  87/* b44 internal pattern match filter info */
  88#define B44_PATTERN_BASE	0x400
  89#define B44_PATTERN_SIZE	0x80
  90#define B44_PMASK_BASE		0x600
  91#define B44_PMASK_SIZE		0x10
  92#define B44_MAX_PATTERNS	16
  93#define B44_ETHIPV6UDP_HLEN	62
  94#define B44_ETHIPV4UDP_HLEN	42
  95
  96MODULE_AUTHOR("Felix Fietkau, Florian Schirmer, Pekka Pietikainen, David S. Miller");
  97MODULE_DESCRIPTION(DRV_DESCRIPTION);
  98MODULE_LICENSE("GPL");
  99
 100static int b44_debug = -1;	/* -1 == use B44_DEF_MSG_ENABLE as value */
 101module_param(b44_debug, int, 0);
 102MODULE_PARM_DESC(b44_debug, "B44 bitmapped debugging message enable value");
 103
 104
 105#ifdef CONFIG_B44_PCI
 106static const struct pci_device_id b44_pci_tbl[] = {
 107	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401) },
 108	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0) },
 109	{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1) },
 110	{ 0 } /* terminate list with empty entry */
 111};
 112MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
 113
 114static struct pci_driver b44_pci_driver = {
 115	.name		= DRV_MODULE_NAME,
 116	.id_table	= b44_pci_tbl,
 117};
 118#endif /* CONFIG_B44_PCI */
 119
 120static const struct ssb_device_id b44_ssb_tbl[] = {
 121	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET, SSB_ANY_REV),
 122	{},
 123};
 124MODULE_DEVICE_TABLE(ssb, b44_ssb_tbl);
 125
 126static void b44_halt(struct b44 *);
 127static void b44_init_rings(struct b44 *);
 128
 129#define B44_FULL_RESET		1
 130#define B44_FULL_RESET_SKIP_PHY	2
 131#define B44_PARTIAL_RESET	3
 132#define B44_CHIP_RESET_FULL	4
 133#define B44_CHIP_RESET_PARTIAL	5
 134
 135static void b44_init_hw(struct b44 *, int);
 136
 137static int dma_desc_sync_size;
 138static int instance;
 139
 140static const char b44_gstrings[][ETH_GSTRING_LEN] = {
 141#define _B44(x...)	# x,
 142B44_STAT_REG_DECLARE
 143#undef _B44
 144};
 145
 146static inline void b44_sync_dma_desc_for_device(struct ssb_device *sdev,
 147						dma_addr_t dma_base,
 148						unsigned long offset,
 149						enum dma_data_direction dir)
 150{
 151	dma_sync_single_for_device(sdev->dma_dev, dma_base + offset,
 152				   dma_desc_sync_size, dir);
 153}
 154
 155static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
 156					     dma_addr_t dma_base,
 157					     unsigned long offset,
 158					     enum dma_data_direction dir)
 159{
 160	dma_sync_single_for_cpu(sdev->dma_dev, dma_base + offset,
 161				dma_desc_sync_size, dir);
 162}
 163
 164static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
 165{
 166	return ssb_read32(bp->sdev, reg);
 167}
 168
 169static inline void bw32(const struct b44 *bp,
 170			unsigned long reg, unsigned long val)
 171{
 172	ssb_write32(bp->sdev, reg, val);
 173}
 174
 175static int b44_wait_bit(struct b44 *bp, unsigned long reg,
 176			u32 bit, unsigned long timeout, const int clear)
 177{
 178	unsigned long i;
 179
 180	for (i = 0; i < timeout; i++) {
 181		u32 val = br32(bp, reg);
 182
 183		if (clear && !(val & bit))
 184			break;
 185		if (!clear && (val & bit))
 186			break;
 187		udelay(10);
 188	}
 189	if (i == timeout) {
 190		if (net_ratelimit())
 191			netdev_err(bp->dev, "BUG!  Timeout waiting for bit %08x of register %lx to %s\n",
 192				   bit, reg, clear ? "clear" : "set");
 193
 194		return -ENODEV;
 195	}
 196	return 0;
 197}
 198
 199static inline void __b44_cam_write(struct b44 *bp,
 200				   const unsigned char *data, int index)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 201{
 202	u32 val;
 203
 204	val  = ((u32) data[2]) << 24;
 205	val |= ((u32) data[3]) << 16;
 206	val |= ((u32) data[4]) <<  8;
 207	val |= ((u32) data[5]) <<  0;
 208	bw32(bp, B44_CAM_DATA_LO, val);
 209	val = (CAM_DATA_HI_VALID |
 210	       (((u32) data[0]) << 8) |
 211	       (((u32) data[1]) << 0));
 212	bw32(bp, B44_CAM_DATA_HI, val);
 213	bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE |
 214			    (index << CAM_CTRL_INDEX_SHIFT)));
 215	b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
 216}
 217
 218static inline void __b44_disable_ints(struct b44 *bp)
 219{
 220	bw32(bp, B44_IMASK, 0);
 221}
 222
 223static void b44_disable_ints(struct b44 *bp)
 224{
 225	__b44_disable_ints(bp);
 226
 227	/* Flush posted writes. */
 228	br32(bp, B44_IMASK);
 229}
 230
 231static void b44_enable_ints(struct b44 *bp)
 232{
 233	bw32(bp, B44_IMASK, bp->imask);
 234}
 235
 236static int __b44_readphy(struct b44 *bp, int phy_addr, int reg, u32 *val)
 237{
 238	int err;
 239
 240	bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
 241	bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
 242			     (MDIO_OP_READ << MDIO_DATA_OP_SHIFT) |
 243			     (phy_addr << MDIO_DATA_PMD_SHIFT) |
 244			     (reg << MDIO_DATA_RA_SHIFT) |
 245			     (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT)));
 246	err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
 247	*val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
 248
 249	return err;
 250}
 251
 252static int __b44_writephy(struct b44 *bp, int phy_addr, int reg, u32 val)
 253{
 254	bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
 255	bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
 256			     (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) |
 257			     (phy_addr << MDIO_DATA_PMD_SHIFT) |
 258			     (reg << MDIO_DATA_RA_SHIFT) |
 259			     (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) |
 260			     (val & MDIO_DATA_DATA)));
 261	return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
 262}
 263
 264static inline int b44_readphy(struct b44 *bp, int reg, u32 *val)
 265{
 266	if (bp->flags & B44_FLAG_EXTERNAL_PHY)
 267		return 0;
 268
 269	return __b44_readphy(bp, bp->phy_addr, reg, val);
 270}
 271
 272static inline int b44_writephy(struct b44 *bp, int reg, u32 val)
 273{
 274	if (bp->flags & B44_FLAG_EXTERNAL_PHY)
 275		return 0;
 276
 277	return __b44_writephy(bp, bp->phy_addr, reg, val);
 278}
 279
 280/* miilib interface */
 281static int b44_mdio_read_mii(struct net_device *dev, int phy_id, int location)
 282{
 283	u32 val;
 284	struct b44 *bp = netdev_priv(dev);
 285	int rc = __b44_readphy(bp, phy_id, location, &val);
 286	if (rc)
 287		return 0xffffffff;
 288	return val;
 289}
 290
 291static void b44_mdio_write_mii(struct net_device *dev, int phy_id, int location,
 292			       int val)
 293{
 294	struct b44 *bp = netdev_priv(dev);
 295	__b44_writephy(bp, phy_id, location, val);
 296}
 297
 298static int b44_mdio_read_phylib(struct mii_bus *bus, int phy_id, int location)
 299{
 300	u32 val;
 301	struct b44 *bp = bus->priv;
 302	int rc = __b44_readphy(bp, phy_id, location, &val);
 303	if (rc)
 304		return 0xffffffff;
 305	return val;
 306}
 307
 308static int b44_mdio_write_phylib(struct mii_bus *bus, int phy_id, int location,
 309				 u16 val)
 310{
 311	struct b44 *bp = bus->priv;
 312	return __b44_writephy(bp, phy_id, location, val);
 313}
 314
 315static int b44_phy_reset(struct b44 *bp)
 316{
 317	u32 val;
 318	int err;
 319
 320	if (bp->flags & B44_FLAG_EXTERNAL_PHY)
 321		return 0;
 322	err = b44_writephy(bp, MII_BMCR, BMCR_RESET);
 323	if (err)
 324		return err;
 325	udelay(100);
 326	err = b44_readphy(bp, MII_BMCR, &val);
 327	if (!err) {
 328		if (val & BMCR_RESET) {
 329			netdev_err(bp->dev, "PHY Reset would not complete\n");
 330			err = -ENODEV;
 331		}
 332	}
 333
 334	return err;
 335}
 336
 337static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags)
 338{
 339	u32 val;
 340
 341	bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE);
 342	bp->flags |= pause_flags;
 343
 344	val = br32(bp, B44_RXCONFIG);
 345	if (pause_flags & B44_FLAG_RX_PAUSE)
 346		val |= RXCONFIG_FLOW;
 347	else
 348		val &= ~RXCONFIG_FLOW;
 349	bw32(bp, B44_RXCONFIG, val);
 350
 351	val = br32(bp, B44_MAC_FLOW);
 352	if (pause_flags & B44_FLAG_TX_PAUSE)
 353		val |= (MAC_FLOW_PAUSE_ENAB |
 354			(0xc0 & MAC_FLOW_RX_HI_WATER));
 355	else
 356		val &= ~MAC_FLOW_PAUSE_ENAB;
 357	bw32(bp, B44_MAC_FLOW, val);
 358}
 359
 360static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote)
 361{
 362	u32 pause_enab = 0;
 363
 364	/* The driver supports only rx pause by default because
 365	   the b44 mac tx pause mechanism generates excessive
 366	   pause frames.
 367	   Use ethtool to turn on b44 tx pause if necessary.
 368	 */
 369	if ((local & ADVERTISE_PAUSE_CAP) &&
 370	    (local & ADVERTISE_PAUSE_ASYM)){
 371		if ((remote & LPA_PAUSE_ASYM) &&
 372		    !(remote & LPA_PAUSE_CAP))
 373			pause_enab |= B44_FLAG_RX_PAUSE;
 374	}
 375
 376	__b44_set_flow_ctrl(bp, pause_enab);
 377}
 378
 379#ifdef CONFIG_BCM47XX
 380#include <linux/bcm47xx_nvram.h>
 381static void b44_wap54g10_workaround(struct b44 *bp)
 382{
 383	char buf[20];
 384	u32 val;
 385	int err;
 386
 387	/*
 388	 * workaround for bad hardware design in Linksys WAP54G v1.0
 389	 * see https://dev.openwrt.org/ticket/146
 390	 * check and reset bit "isolate"
 391	 */
 392	if (bcm47xx_nvram_getenv("boardnum", buf, sizeof(buf)) < 0)
 393		return;
 394	if (simple_strtoul(buf, NULL, 0) == 2) {
 395		err = __b44_readphy(bp, 0, MII_BMCR, &val);
 396		if (err)
 397			goto error;
 398		if (!(val & BMCR_ISOLATE))
 399			return;
 400		val &= ~BMCR_ISOLATE;
 401		err = __b44_writephy(bp, 0, MII_BMCR, val);
 402		if (err)
 403			goto error;
 404	}
 405	return;
 406error:
 407	pr_warn("PHY: cannot reset MII transceiver isolate bit\n");
 408}
 409#else
 410static inline void b44_wap54g10_workaround(struct b44 *bp)
 411{
 412}
 413#endif
 414
 415static int b44_setup_phy(struct b44 *bp)
 416{
 417	u32 val;
 418	int err;
 419
 420	b44_wap54g10_workaround(bp);
 421
 422	if (bp->flags & B44_FLAG_EXTERNAL_PHY)
 423		return 0;
 424	if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0)
 425		goto out;
 426	if ((err = b44_writephy(bp, B44_MII_ALEDCTRL,
 427				val & MII_ALEDCTRL_ALLMSK)) != 0)
 428		goto out;
 429	if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0)
 430		goto out;
 431	if ((err = b44_writephy(bp, B44_MII_TLEDCTRL,
 432				val | MII_TLEDCTRL_ENABLE)) != 0)
 433		goto out;
 434
 435	if (!(bp->flags & B44_FLAG_FORCE_LINK)) {
 436		u32 adv = ADVERTISE_CSMA;
 437
 438		if (bp->flags & B44_FLAG_ADV_10HALF)
 439			adv |= ADVERTISE_10HALF;
 440		if (bp->flags & B44_FLAG_ADV_10FULL)
 441			adv |= ADVERTISE_10FULL;
 442		if (bp->flags & B44_FLAG_ADV_100HALF)
 443			adv |= ADVERTISE_100HALF;
 444		if (bp->flags & B44_FLAG_ADV_100FULL)
 445			adv |= ADVERTISE_100FULL;
 446
 447		if (bp->flags & B44_FLAG_PAUSE_AUTO)
 448			adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
 449
 450		if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0)
 451			goto out;
 452		if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE |
 453						       BMCR_ANRESTART))) != 0)
 454			goto out;
 455	} else {
 456		u32 bmcr;
 457
 458		if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0)
 459			goto out;
 460		bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100);
 461		if (bp->flags & B44_FLAG_100_BASE_T)
 462			bmcr |= BMCR_SPEED100;
 463		if (bp->flags & B44_FLAG_FULL_DUPLEX)
 464			bmcr |= BMCR_FULLDPLX;
 465		if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0)
 466			goto out;
 467
 468		/* Since we will not be negotiating there is no safe way
 469		 * to determine if the link partner supports flow control
 470		 * or not.  So just disable it completely in this case.
 471		 */
 472		b44_set_flow_ctrl(bp, 0, 0);
 473	}
 474
 475out:
 476	return err;
 477}
 478
 479static void b44_stats_update(struct b44 *bp)
 480{
 481	unsigned long reg;
 482	u64 *val;
 483
 484	val = &bp->hw_stats.tx_good_octets;
 485	u64_stats_update_begin(&bp->hw_stats.syncp);
 486
 487	for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) {
 488		*val++ += br32(bp, reg);
 489	}
 490
 491	for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) {
 492		*val++ += br32(bp, reg);
 493	}
 494
 495	u64_stats_update_end(&bp->hw_stats.syncp);
 496}
 497
 498static void b44_link_report(struct b44 *bp)
 499{
 500	if (!netif_carrier_ok(bp->dev)) {
 501		netdev_info(bp->dev, "Link is down\n");
 502	} else {
 503		netdev_info(bp->dev, "Link is up at %d Mbps, %s duplex\n",
 504			    (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
 505			    (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
 506
 507		netdev_info(bp->dev, "Flow control is %s for TX and %s for RX\n",
 508			    (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off",
 509			    (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off");
 510	}
 511}
 512
 513static void b44_check_phy(struct b44 *bp)
 514{
 515	u32 bmsr, aux;
 516
 517	if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
 518		bp->flags |= B44_FLAG_100_BASE_T;
 519		if (!netif_carrier_ok(bp->dev)) {
 520			u32 val = br32(bp, B44_TX_CTRL);
 521			if (bp->flags & B44_FLAG_FULL_DUPLEX)
 522				val |= TX_CTRL_DUPLEX;
 523			else
 524				val &= ~TX_CTRL_DUPLEX;
 525			bw32(bp, B44_TX_CTRL, val);
 526			netif_carrier_on(bp->dev);
 527			b44_link_report(bp);
 528		}
 529		return;
 530	}
 531
 532	if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
 533	    !b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
 534	    (bmsr != 0xffff)) {
 535		if (aux & MII_AUXCTRL_SPEED)
 536			bp->flags |= B44_FLAG_100_BASE_T;
 537		else
 538			bp->flags &= ~B44_FLAG_100_BASE_T;
 539		if (aux & MII_AUXCTRL_DUPLEX)
 540			bp->flags |= B44_FLAG_FULL_DUPLEX;
 541		else
 542			bp->flags &= ~B44_FLAG_FULL_DUPLEX;
 543
 544		if (!netif_carrier_ok(bp->dev) &&
 545		    (bmsr & BMSR_LSTATUS)) {
 546			u32 val = br32(bp, B44_TX_CTRL);
 547			u32 local_adv, remote_adv;
 548
 549			if (bp->flags & B44_FLAG_FULL_DUPLEX)
 550				val |= TX_CTRL_DUPLEX;
 551			else
 552				val &= ~TX_CTRL_DUPLEX;
 553			bw32(bp, B44_TX_CTRL, val);
 554
 555			if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
 556			    !b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
 557			    !b44_readphy(bp, MII_LPA, &remote_adv))
 558				b44_set_flow_ctrl(bp, local_adv, remote_adv);
 559
 560			/* Link now up */
 561			netif_carrier_on(bp->dev);
 562			b44_link_report(bp);
 563		} else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
 564			/* Link now down */
 565			netif_carrier_off(bp->dev);
 566			b44_link_report(bp);
 567		}
 568
 569		if (bmsr & BMSR_RFAULT)
 570			netdev_warn(bp->dev, "Remote fault detected in PHY\n");
 571		if (bmsr & BMSR_JCD)
 572			netdev_warn(bp->dev, "Jabber detected in PHY\n");
 573	}
 574}
 575
 576static void b44_timer(struct timer_list *t)
 577{
 578	struct b44 *bp = from_timer(bp, t, timer);
 579
 580	spin_lock_irq(&bp->lock);
 581
 582	b44_check_phy(bp);
 583
 584	b44_stats_update(bp);
 585
 586	spin_unlock_irq(&bp->lock);
 587
 588	mod_timer(&bp->timer, round_jiffies(jiffies + HZ));
 589}
 590
 591static void b44_tx(struct b44 *bp)
 592{
 593	u32 cur, cons;
 594	unsigned bytes_compl = 0, pkts_compl = 0;
 595
 596	cur  = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
 597	cur /= sizeof(struct dma_desc);
 598
 599	/* XXX needs updating when NETIF_F_SG is supported */
 600	for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) {
 601		struct ring_info *rp = &bp->tx_buffers[cons];
 602		struct sk_buff *skb = rp->skb;
 603
 604		BUG_ON(skb == NULL);
 605
 606		dma_unmap_single(bp->sdev->dma_dev,
 607				 rp->mapping,
 608				 skb->len,
 609				 DMA_TO_DEVICE);
 610		rp->skb = NULL;
 611
 612		bytes_compl += skb->len;
 613		pkts_compl++;
 614
 615		dev_consume_skb_irq(skb);
 616	}
 617
 618	netdev_completed_queue(bp->dev, pkts_compl, bytes_compl);
 619	bp->tx_cons = cons;
 620	if (netif_queue_stopped(bp->dev) &&
 621	    TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
 622		netif_wake_queue(bp->dev);
 623
 624	bw32(bp, B44_GPTIMER, 0);
 625}
 626
 627/* Works like this.  This chip writes a 'struct rx_header" 30 bytes
 628 * before the DMA address you give it.  So we allocate 30 more bytes
 629 * for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then
 630 * point the chip at 30 bytes past where the rx_header will go.
 631 */
 632static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
 633{
 634	struct dma_desc *dp;
 635	struct ring_info *src_map, *map;
 636	struct rx_header *rh;
 637	struct sk_buff *skb;
 638	dma_addr_t mapping;
 639	int dest_idx;
 640	u32 ctrl;
 641
 642	src_map = NULL;
 643	if (src_idx >= 0)
 644		src_map = &bp->rx_buffers[src_idx];
 645	dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
 646	map = &bp->rx_buffers[dest_idx];
 647	skb = netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ);
 648	if (skb == NULL)
 649		return -ENOMEM;
 650
 651	mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
 652				 RX_PKT_BUF_SZ,
 653				 DMA_FROM_DEVICE);
 654
 655	/* Hardware bug work-around, the chip is unable to do PCI DMA
 656	   to/from anything above 1GB :-( */
 657	if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
 658		mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
 659		/* Sigh... */
 660		if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
 661			dma_unmap_single(bp->sdev->dma_dev, mapping,
 662					     RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
 663		dev_kfree_skb_any(skb);
 664		skb = alloc_skb(RX_PKT_BUF_SZ, GFP_ATOMIC | GFP_DMA);
 665		if (skb == NULL)
 666			return -ENOMEM;
 667		mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
 668					 RX_PKT_BUF_SZ,
 669					 DMA_FROM_DEVICE);
 670		if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
 671		    mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
 672			if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
 673				dma_unmap_single(bp->sdev->dma_dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
 674			dev_kfree_skb_any(skb);
 675			return -ENOMEM;
 676		}
 677		bp->force_copybreak = 1;
 678	}
 679
 680	rh = (struct rx_header *) skb->data;
 681
 682	rh->len = 0;
 683	rh->flags = 0;
 684
 685	map->skb = skb;
 686	map->mapping = mapping;
 687
 688	if (src_map != NULL)
 689		src_map->skb = NULL;
 690
 691	ctrl = (DESC_CTRL_LEN & RX_PKT_BUF_SZ);
 692	if (dest_idx == (B44_RX_RING_SIZE - 1))
 693		ctrl |= DESC_CTRL_EOT;
 694
 695	dp = &bp->rx_ring[dest_idx];
 696	dp->ctrl = cpu_to_le32(ctrl);
 697	dp->addr = cpu_to_le32((u32) mapping + bp->dma_offset);
 698
 699	if (bp->flags & B44_FLAG_RX_RING_HACK)
 700		b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
 701			                    dest_idx * sizeof(*dp),
 702			                    DMA_BIDIRECTIONAL);
 703
 704	return RX_PKT_BUF_SZ;
 705}
 706
 707static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
 708{
 709	struct dma_desc *src_desc, *dest_desc;
 710	struct ring_info *src_map, *dest_map;
 711	struct rx_header *rh;
 712	int dest_idx;
 713	__le32 ctrl;
 714
 715	dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
 716	dest_desc = &bp->rx_ring[dest_idx];
 717	dest_map = &bp->rx_buffers[dest_idx];
 718	src_desc = &bp->rx_ring[src_idx];
 719	src_map = &bp->rx_buffers[src_idx];
 720
 721	dest_map->skb = src_map->skb;
 722	rh = (struct rx_header *) src_map->skb->data;
 723	rh->len = 0;
 724	rh->flags = 0;
 725	dest_map->mapping = src_map->mapping;
 726
 727	if (bp->flags & B44_FLAG_RX_RING_HACK)
 728		b44_sync_dma_desc_for_cpu(bp->sdev, bp->rx_ring_dma,
 729			                 src_idx * sizeof(*src_desc),
 730			                 DMA_BIDIRECTIONAL);
 731
 732	ctrl = src_desc->ctrl;
 733	if (dest_idx == (B44_RX_RING_SIZE - 1))
 734		ctrl |= cpu_to_le32(DESC_CTRL_EOT);
 735	else
 736		ctrl &= cpu_to_le32(~DESC_CTRL_EOT);
 737
 738	dest_desc->ctrl = ctrl;
 739	dest_desc->addr = src_desc->addr;
 740
 741	src_map->skb = NULL;
 742
 743	if (bp->flags & B44_FLAG_RX_RING_HACK)
 744		b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
 745					     dest_idx * sizeof(*dest_desc),
 746					     DMA_BIDIRECTIONAL);
 747
 748	dma_sync_single_for_device(bp->sdev->dma_dev, dest_map->mapping,
 749				   RX_PKT_BUF_SZ,
 750				   DMA_FROM_DEVICE);
 751}
 752
 753static int b44_rx(struct b44 *bp, int budget)
 754{
 755	int received;
 756	u32 cons, prod;
 757
 758	received = 0;
 759	prod  = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK;
 760	prod /= sizeof(struct dma_desc);
 761	cons = bp->rx_cons;
 762
 763	while (cons != prod && budget > 0) {
 764		struct ring_info *rp = &bp->rx_buffers[cons];
 765		struct sk_buff *skb = rp->skb;
 766		dma_addr_t map = rp->mapping;
 767		struct rx_header *rh;
 768		u16 len;
 769
 770		dma_sync_single_for_cpu(bp->sdev->dma_dev, map,
 771					RX_PKT_BUF_SZ,
 772					DMA_FROM_DEVICE);
 773		rh = (struct rx_header *) skb->data;
 774		len = le16_to_cpu(rh->len);
 775		if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) ||
 776		    (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
 777		drop_it:
 778			b44_recycle_rx(bp, cons, bp->rx_prod);
 779		drop_it_no_recycle:
 780			bp->dev->stats.rx_dropped++;
 781			goto next_pkt;
 782		}
 783
 784		if (len == 0) {
 785			int i = 0;
 786
 787			do {
 788				udelay(2);
 789				barrier();
 790				len = le16_to_cpu(rh->len);
 791			} while (len == 0 && i++ < 5);
 792			if (len == 0)
 793				goto drop_it;
 794		}
 795
 796		/* Omit CRC. */
 797		len -= 4;
 798
 799		if (!bp->force_copybreak && len > RX_COPY_THRESHOLD) {
 800			int skb_size;
 801			skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
 802			if (skb_size < 0)
 803				goto drop_it;
 804			dma_unmap_single(bp->sdev->dma_dev, map,
 805					 skb_size, DMA_FROM_DEVICE);
 806			/* Leave out rx_header */
 807			skb_put(skb, len + RX_PKT_OFFSET);
 808			skb_pull(skb, RX_PKT_OFFSET);
 809		} else {
 810			struct sk_buff *copy_skb;
 811
 812			b44_recycle_rx(bp, cons, bp->rx_prod);
 813			copy_skb = napi_alloc_skb(&bp->napi, len);
 814			if (copy_skb == NULL)
 815				goto drop_it_no_recycle;
 816
 817			skb_put(copy_skb, len);
 818			/* DMA sync done above, copy just the actual packet */
 819			skb_copy_from_linear_data_offset(skb, RX_PKT_OFFSET,
 820							 copy_skb->data, len);
 821			skb = copy_skb;
 822		}
 823		skb_checksum_none_assert(skb);
 824		skb->protocol = eth_type_trans(skb, bp->dev);
 825		netif_receive_skb(skb);
 826		received++;
 827		budget--;
 828	next_pkt:
 829		bp->rx_prod = (bp->rx_prod + 1) &
 830			(B44_RX_RING_SIZE - 1);
 831		cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
 832	}
 833
 834	bp->rx_cons = cons;
 835	bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
 836
 837	return received;
 838}
 839
 840static int b44_poll(struct napi_struct *napi, int budget)
 841{
 842	struct b44 *bp = container_of(napi, struct b44, napi);
 843	int work_done;
 844	unsigned long flags;
 845
 846	spin_lock_irqsave(&bp->lock, flags);
 847
 848	if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
 849		/* spin_lock(&bp->tx_lock); */
 850		b44_tx(bp);
 851		/* spin_unlock(&bp->tx_lock); */
 852	}
 853	if (bp->istat & ISTAT_RFO) {	/* fast recovery, in ~20msec */
 854		bp->istat &= ~ISTAT_RFO;
 855		b44_disable_ints(bp);
 856		ssb_device_enable(bp->sdev, 0); /* resets ISTAT_RFO */
 857		b44_init_rings(bp);
 858		b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
 859		netif_wake_queue(bp->dev);
 860	}
 861
 862	spin_unlock_irqrestore(&bp->lock, flags);
 863
 864	work_done = 0;
 865	if (bp->istat & ISTAT_RX)
 866		work_done += b44_rx(bp, budget);
 867
 868	if (bp->istat & ISTAT_ERRORS) {
 869		spin_lock_irqsave(&bp->lock, flags);
 870		b44_halt(bp);
 871		b44_init_rings(bp);
 872		b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
 873		netif_wake_queue(bp->dev);
 874		spin_unlock_irqrestore(&bp->lock, flags);
 875		work_done = 0;
 876	}
 877
 878	if (work_done < budget) {
 879		napi_complete_done(napi, work_done);
 880		b44_enable_ints(bp);
 881	}
 882
 883	return work_done;
 884}
 885
 886static irqreturn_t b44_interrupt(int irq, void *dev_id)
 887{
 888	struct net_device *dev = dev_id;
 889	struct b44 *bp = netdev_priv(dev);
 890	u32 istat, imask;
 891	int handled = 0;
 892
 893	spin_lock(&bp->lock);
 894
 895	istat = br32(bp, B44_ISTAT);
 896	imask = br32(bp, B44_IMASK);
 897
 898	/* The interrupt mask register controls which interrupt bits
 899	 * will actually raise an interrupt to the CPU when set by hw/firmware,
 900	 * but doesn't mask off the bits.
 901	 */
 902	istat &= imask;
 903	if (istat) {
 904		handled = 1;
 905
 906		if (unlikely(!netif_running(dev))) {
 907			netdev_info(dev, "late interrupt\n");
 908			goto irq_ack;
 909		}
 910
 911		if (napi_schedule_prep(&bp->napi)) {
 912			/* NOTE: These writes are posted by the readback of
 913			 *       the ISTAT register below.
 914			 */
 915			bp->istat = istat;
 916			__b44_disable_ints(bp);
 917			__napi_schedule(&bp->napi);
 918		}
 919
 920irq_ack:
 921		bw32(bp, B44_ISTAT, istat);
 922		br32(bp, B44_ISTAT);
 923	}
 924	spin_unlock(&bp->lock);
 925	return IRQ_RETVAL(handled);
 926}
 927
 928static void b44_tx_timeout(struct net_device *dev, unsigned int txqueue)
 929{
 930	struct b44 *bp = netdev_priv(dev);
 931
 932	netdev_err(dev, "transmit timed out, resetting\n");
 933
 934	spin_lock_irq(&bp->lock);
 935
 936	b44_halt(bp);
 937	b44_init_rings(bp);
 938	b44_init_hw(bp, B44_FULL_RESET);
 939
 940	spin_unlock_irq(&bp->lock);
 941
 942	b44_enable_ints(bp);
 943
 944	netif_wake_queue(dev);
 945}
 946
 947static netdev_tx_t b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
 948{
 949	struct b44 *bp = netdev_priv(dev);
 950	int rc = NETDEV_TX_OK;
 951	dma_addr_t mapping;
 952	u32 len, entry, ctrl;
 953	unsigned long flags;
 954
 955	len = skb->len;
 956	spin_lock_irqsave(&bp->lock, flags);
 957
 958	/* This is a hard error, log it. */
 959	if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
 960		netif_stop_queue(dev);
 961		netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
 962		goto err_out;
 963	}
 964
 965	mapping = dma_map_single(bp->sdev->dma_dev, skb->data, len, DMA_TO_DEVICE);
 966	if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
 967		struct sk_buff *bounce_skb;
 968
 969		/* Chip can't handle DMA to/from >1GB, use bounce buffer */
 970		if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
 971			dma_unmap_single(bp->sdev->dma_dev, mapping, len,
 972					     DMA_TO_DEVICE);
 973
 974		bounce_skb = alloc_skb(len, GFP_ATOMIC | GFP_DMA);
 975		if (!bounce_skb)
 976			goto err_out;
 977
 978		mapping = dma_map_single(bp->sdev->dma_dev, bounce_skb->data,
 979					 len, DMA_TO_DEVICE);
 980		if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
 981			if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
 982				dma_unmap_single(bp->sdev->dma_dev, mapping,
 983						     len, DMA_TO_DEVICE);
 984			dev_kfree_skb_any(bounce_skb);
 985			goto err_out;
 986		}
 987
 988		skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
 989		dev_consume_skb_any(skb);
 990		skb = bounce_skb;
 991	}
 992
 993	entry = bp->tx_prod;
 994	bp->tx_buffers[entry].skb = skb;
 995	bp->tx_buffers[entry].mapping = mapping;
 996
 997	ctrl  = (len & DESC_CTRL_LEN);
 998	ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
 999	if (entry == (B44_TX_RING_SIZE - 1))
1000		ctrl |= DESC_CTRL_EOT;
1001
1002	bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1003	bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1004
1005	if (bp->flags & B44_FLAG_TX_RING_HACK)
1006		b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
1007			                    entry * sizeof(bp->tx_ring[0]),
1008			                    DMA_TO_DEVICE);
1009
1010	entry = NEXT_TX(entry);
1011
1012	bp->tx_prod = entry;
1013
1014	wmb();
1015
1016	bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1017	if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1018		bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1019	if (bp->flags & B44_FLAG_REORDER_BUG)
1020		br32(bp, B44_DMATX_PTR);
1021
1022	netdev_sent_queue(dev, skb->len);
1023
1024	if (TX_BUFFS_AVAIL(bp) < 1)
1025		netif_stop_queue(dev);
1026
1027out_unlock:
1028	spin_unlock_irqrestore(&bp->lock, flags);
1029
1030	return rc;
1031
1032err_out:
1033	rc = NETDEV_TX_BUSY;
1034	goto out_unlock;
1035}
1036
1037static int b44_change_mtu(struct net_device *dev, int new_mtu)
1038{
1039	struct b44 *bp = netdev_priv(dev);
1040
1041	if (!netif_running(dev)) {
1042		/* We'll just catch it later when the
1043		 * device is up'd.
1044		 */
1045		dev->mtu = new_mtu;
1046		return 0;
1047	}
1048
1049	spin_lock_irq(&bp->lock);
1050	b44_halt(bp);
1051	dev->mtu = new_mtu;
1052	b44_init_rings(bp);
1053	b44_init_hw(bp, B44_FULL_RESET);
1054	spin_unlock_irq(&bp->lock);
1055
1056	b44_enable_ints(bp);
1057
1058	return 0;
1059}
1060
1061/* Free up pending packets in all rx/tx rings.
1062 *
1063 * The chip has been shut down and the driver detached from
1064 * the networking, so no interrupts or new tx packets will
1065 * end up in the driver.  bp->lock is not held and we are not
1066 * in an interrupt context and thus may sleep.
1067 */
1068static void b44_free_rings(struct b44 *bp)
1069{
1070	struct ring_info *rp;
1071	int i;
1072
1073	for (i = 0; i < B44_RX_RING_SIZE; i++) {
1074		rp = &bp->rx_buffers[i];
1075
1076		if (rp->skb == NULL)
1077			continue;
1078		dma_unmap_single(bp->sdev->dma_dev, rp->mapping, RX_PKT_BUF_SZ,
1079				 DMA_FROM_DEVICE);
1080		dev_kfree_skb_any(rp->skb);
1081		rp->skb = NULL;
1082	}
1083
1084	/* XXX needs changes once NETIF_F_SG is set... */
1085	for (i = 0; i < B44_TX_RING_SIZE; i++) {
1086		rp = &bp->tx_buffers[i];
1087
1088		if (rp->skb == NULL)
1089			continue;
1090		dma_unmap_single(bp->sdev->dma_dev, rp->mapping, rp->skb->len,
1091				 DMA_TO_DEVICE);
1092		dev_kfree_skb_any(rp->skb);
1093		rp->skb = NULL;
1094	}
1095}
1096
1097/* Initialize tx/rx rings for packet processing.
1098 *
1099 * The chip has been shut down and the driver detached from
1100 * the networking, so no interrupts or new tx packets will
1101 * end up in the driver.
1102 */
1103static void b44_init_rings(struct b44 *bp)
1104{
1105	int i;
1106
1107	b44_free_rings(bp);
1108
1109	memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1110	memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1111
1112	if (bp->flags & B44_FLAG_RX_RING_HACK)
1113		dma_sync_single_for_device(bp->sdev->dma_dev, bp->rx_ring_dma,
1114					   DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
1115
1116	if (bp->flags & B44_FLAG_TX_RING_HACK)
1117		dma_sync_single_for_device(bp->sdev->dma_dev, bp->tx_ring_dma,
1118					   DMA_TABLE_BYTES, DMA_TO_DEVICE);
1119
1120	for (i = 0; i < bp->rx_pending; i++) {
1121		if (b44_alloc_rx_skb(bp, -1, i) < 0)
1122			break;
1123	}
1124}
1125
1126/*
1127 * Must not be invoked with interrupt sources disabled and
1128 * the hardware shutdown down.
1129 */
1130static void b44_free_consistent(struct b44 *bp)
1131{
1132	kfree(bp->rx_buffers);
1133	bp->rx_buffers = NULL;
1134	kfree(bp->tx_buffers);
1135	bp->tx_buffers = NULL;
1136	if (bp->rx_ring) {
1137		if (bp->flags & B44_FLAG_RX_RING_HACK) {
1138			dma_unmap_single(bp->sdev->dma_dev, bp->rx_ring_dma,
1139					 DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
1140			kfree(bp->rx_ring);
1141		} else
1142			dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
1143					  bp->rx_ring, bp->rx_ring_dma);
1144		bp->rx_ring = NULL;
1145		bp->flags &= ~B44_FLAG_RX_RING_HACK;
1146	}
1147	if (bp->tx_ring) {
1148		if (bp->flags & B44_FLAG_TX_RING_HACK) {
1149			dma_unmap_single(bp->sdev->dma_dev, bp->tx_ring_dma,
1150					 DMA_TABLE_BYTES, DMA_TO_DEVICE);
1151			kfree(bp->tx_ring);
1152		} else
1153			dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
1154					  bp->tx_ring, bp->tx_ring_dma);
1155		bp->tx_ring = NULL;
1156		bp->flags &= ~B44_FLAG_TX_RING_HACK;
1157	}
1158}
1159
1160/*
1161 * Must not be invoked with interrupt sources disabled and
1162 * the hardware shutdown down.  Can sleep.
1163 */
1164static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
1165{
1166	int size;
1167
1168	size  = B44_RX_RING_SIZE * sizeof(struct ring_info);
1169	bp->rx_buffers = kzalloc(size, gfp);
1170	if (!bp->rx_buffers)
1171		goto out_err;
1172
1173	size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1174	bp->tx_buffers = kzalloc(size, gfp);
1175	if (!bp->tx_buffers)
1176		goto out_err;
1177
1178	size = DMA_TABLE_BYTES;
1179	bp->rx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
1180					 &bp->rx_ring_dma, gfp);
1181	if (!bp->rx_ring) {
1182		/* Allocation may have failed due to dma_alloc_coherent
1183		   insisting on use of GFP_DMA, which is more restrictive
1184		   than necessary...  */
1185		struct dma_desc *rx_ring;
1186		dma_addr_t rx_ring_dma;
1187
1188		rx_ring = kzalloc(size, gfp);
1189		if (!rx_ring)
1190			goto out_err;
1191
1192		rx_ring_dma = dma_map_single(bp->sdev->dma_dev, rx_ring,
1193					     DMA_TABLE_BYTES,
1194					     DMA_BIDIRECTIONAL);
1195
1196		if (dma_mapping_error(bp->sdev->dma_dev, rx_ring_dma) ||
1197			rx_ring_dma + size > DMA_BIT_MASK(30)) {
1198			kfree(rx_ring);
1199			goto out_err;
1200		}
1201
1202		bp->rx_ring = rx_ring;
1203		bp->rx_ring_dma = rx_ring_dma;
1204		bp->flags |= B44_FLAG_RX_RING_HACK;
1205	}
1206
1207	bp->tx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
1208					 &bp->tx_ring_dma, gfp);
1209	if (!bp->tx_ring) {
1210		/* Allocation may have failed due to ssb_dma_alloc_consistent
1211		   insisting on use of GFP_DMA, which is more restrictive
1212		   than necessary...  */
1213		struct dma_desc *tx_ring;
1214		dma_addr_t tx_ring_dma;
1215
1216		tx_ring = kzalloc(size, gfp);
1217		if (!tx_ring)
1218			goto out_err;
1219
1220		tx_ring_dma = dma_map_single(bp->sdev->dma_dev, tx_ring,
1221					     DMA_TABLE_BYTES,
1222					     DMA_TO_DEVICE);
1223
1224		if (dma_mapping_error(bp->sdev->dma_dev, tx_ring_dma) ||
1225			tx_ring_dma + size > DMA_BIT_MASK(30)) {
1226			kfree(tx_ring);
1227			goto out_err;
1228		}
1229
1230		bp->tx_ring = tx_ring;
1231		bp->tx_ring_dma = tx_ring_dma;
1232		bp->flags |= B44_FLAG_TX_RING_HACK;
1233	}
1234
1235	return 0;
1236
1237out_err:
1238	b44_free_consistent(bp);
1239	return -ENOMEM;
1240}
1241
1242/* bp->lock is held. */
1243static void b44_clear_stats(struct b44 *bp)
1244{
1245	unsigned long reg;
1246
1247	bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1248	for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1249		br32(bp, reg);
1250	for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1251		br32(bp, reg);
1252}
1253
1254/* bp->lock is held. */
1255static void b44_chip_reset(struct b44 *bp, int reset_kind)
1256{
1257	struct ssb_device *sdev = bp->sdev;
1258	bool was_enabled;
1259
1260	was_enabled = ssb_device_is_enabled(bp->sdev);
1261
1262	ssb_device_enable(bp->sdev, 0);
1263	ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
1264
1265	if (was_enabled) {
1266		bw32(bp, B44_RCV_LAZY, 0);
1267		bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1268		b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1);
1269		bw32(bp, B44_DMATX_CTRL, 0);
1270		bp->tx_prod = bp->tx_cons = 0;
1271		if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1272			b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1273				     100, 0);
1274		}
1275		bw32(bp, B44_DMARX_CTRL, 0);
1276		bp->rx_prod = bp->rx_cons = 0;
1277	}
1278
1279	b44_clear_stats(bp);
1280
1281	/*
1282	 * Don't enable PHY if we are doing a partial reset
1283	 * we are probably going to power down
1284	 */
1285	if (reset_kind == B44_CHIP_RESET_PARTIAL)
1286		return;
1287
1288	switch (sdev->bus->bustype) {
1289	case SSB_BUSTYPE_SSB:
1290		bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1291		     (DIV_ROUND_CLOSEST(ssb_clockspeed(sdev->bus),
1292					B44_MDC_RATIO)
1293		     & MDIO_CTRL_MAXF_MASK)));
1294		break;
1295	case SSB_BUSTYPE_PCI:
1296		bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1297		     (0x0d & MDIO_CTRL_MAXF_MASK)));
1298		break;
1299	case SSB_BUSTYPE_PCMCIA:
1300	case SSB_BUSTYPE_SDIO:
1301		WARN_ON(1); /* A device with this bus does not exist. */
1302		break;
1303	}
1304
1305	br32(bp, B44_MDIO_CTRL);
1306
1307	if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1308		bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1309		br32(bp, B44_ENET_CTRL);
1310		bp->flags |= B44_FLAG_EXTERNAL_PHY;
1311	} else {
1312		u32 val = br32(bp, B44_DEVCTRL);
1313
1314		if (val & DEVCTRL_EPR) {
1315			bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1316			br32(bp, B44_DEVCTRL);
1317			udelay(100);
1318		}
1319		bp->flags &= ~B44_FLAG_EXTERNAL_PHY;
1320	}
1321}
1322
1323/* bp->lock is held. */
1324static void b44_halt(struct b44 *bp)
1325{
1326	b44_disable_ints(bp);
1327	/* reset PHY */
1328	b44_phy_reset(bp);
1329	/* power down PHY */
1330	netdev_info(bp->dev, "powering down PHY\n");
1331	bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
1332	/* now reset the chip, but without enabling the MAC&PHY
1333	 * part of it. This has to be done _after_ we shut down the PHY */
1334	if (bp->flags & B44_FLAG_EXTERNAL_PHY)
1335		b44_chip_reset(bp, B44_CHIP_RESET_FULL);
1336	else
1337		b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1338}
1339
1340/* bp->lock is held. */
1341static void __b44_set_mac_addr(struct b44 *bp)
1342{
1343	bw32(bp, B44_CAM_CTRL, 0);
1344	if (!(bp->dev->flags & IFF_PROMISC)) {
1345		u32 val;
1346
1347		__b44_cam_write(bp, bp->dev->dev_addr, 0);
1348		val = br32(bp, B44_CAM_CTRL);
1349		bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1350	}
1351}
1352
1353static int b44_set_mac_addr(struct net_device *dev, void *p)
1354{
1355	struct b44 *bp = netdev_priv(dev);
1356	struct sockaddr *addr = p;
1357	u32 val;
1358
1359	if (netif_running(dev))
1360		return -EBUSY;
1361
1362	if (!is_valid_ether_addr(addr->sa_data))
1363		return -EINVAL;
1364
1365	eth_hw_addr_set(dev, addr->sa_data);
1366
1367	spin_lock_irq(&bp->lock);
1368
1369	val = br32(bp, B44_RXCONFIG);
1370	if (!(val & RXCONFIG_CAM_ABSENT))
1371		__b44_set_mac_addr(bp);
1372
1373	spin_unlock_irq(&bp->lock);
1374
1375	return 0;
1376}
1377
1378/* Called at device open time to get the chip ready for
1379 * packet processing.  Invoked with bp->lock held.
1380 */
1381static void __b44_set_rx_mode(struct net_device *);
1382static void b44_init_hw(struct b44 *bp, int reset_kind)
1383{
1384	u32 val;
1385
1386	b44_chip_reset(bp, B44_CHIP_RESET_FULL);
1387	if (reset_kind == B44_FULL_RESET) {
1388		b44_phy_reset(bp);
1389		b44_setup_phy(bp);
1390	}
1391
1392	/* Enable CRC32, set proper LED modes and power on PHY */
1393	bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
1394	bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
1395
1396	/* This sets the MAC address too.  */
1397	__b44_set_rx_mode(bp->dev);
1398
1399	/* MTU + eth header + possible VLAN tag + struct rx_header */
1400	bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1401	bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1402
1403	bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
1404	if (reset_kind == B44_PARTIAL_RESET) {
1405		bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1406				      (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1407	} else {
1408		bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
1409		bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
1410		bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1411				      (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1412		bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
1413
1414		bw32(bp, B44_DMARX_PTR, bp->rx_pending);
1415		bp->rx_prod = bp->rx_pending;
1416
1417		bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1418	}
1419
1420	val = br32(bp, B44_ENET_CTRL);
1421	bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
1422
1423	netdev_reset_queue(bp->dev);
1424}
1425
1426static int b44_open(struct net_device *dev)
1427{
1428	struct b44 *bp = netdev_priv(dev);
1429	int err;
1430
1431	err = b44_alloc_consistent(bp, GFP_KERNEL);
1432	if (err)
1433		goto out;
1434
1435	napi_enable(&bp->napi);
1436
1437	b44_init_rings(bp);
1438	b44_init_hw(bp, B44_FULL_RESET);
1439
1440	b44_check_phy(bp);
1441
1442	err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
1443	if (unlikely(err < 0)) {
1444		napi_disable(&bp->napi);
1445		b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1446		b44_free_rings(bp);
1447		b44_free_consistent(bp);
1448		goto out;
1449	}
1450
1451	timer_setup(&bp->timer, b44_timer, 0);
1452	bp->timer.expires = jiffies + HZ;
1453	add_timer(&bp->timer);
1454
1455	b44_enable_ints(bp);
1456
1457	if (bp->flags & B44_FLAG_EXTERNAL_PHY)
1458		phy_start(dev->phydev);
1459
1460	netif_start_queue(dev);
1461out:
1462	return err;
1463}
1464
1465#ifdef CONFIG_NET_POLL_CONTROLLER
1466/*
1467 * Polling receive - used by netconsole and other diagnostic tools
1468 * to allow network i/o with interrupts disabled.
1469 */
1470static void b44_poll_controller(struct net_device *dev)
1471{
1472	disable_irq(dev->irq);
1473	b44_interrupt(dev->irq, dev);
1474	enable_irq(dev->irq);
1475}
1476#endif
1477
1478static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
1479{
1480	u32 i;
1481	u32 *pattern = (u32 *) pp;
1482
1483	for (i = 0; i < bytes; i += sizeof(u32)) {
1484		bw32(bp, B44_FILT_ADDR, table_offset + i);
1485		bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
1486	}
1487}
1488
1489static int b44_magic_pattern(const u8 *macaddr, u8 *ppattern, u8 *pmask,
1490			     int offset)
1491{
1492	int magicsync = 6;
1493	int k, j, len = offset;
1494	int ethaddr_bytes = ETH_ALEN;
1495
1496	memset(ppattern + offset, 0xff, magicsync);
1497	for (j = 0; j < magicsync; j++) {
1498		pmask[len >> 3] |= BIT(len & 7);
1499		len++;
1500	}
1501
1502	for (j = 0; j < B44_MAX_PATTERNS; j++) {
1503		if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
1504			ethaddr_bytes = ETH_ALEN;
1505		else
1506			ethaddr_bytes = B44_PATTERN_SIZE - len;
1507		if (ethaddr_bytes <=0)
1508			break;
1509		for (k = 0; k< ethaddr_bytes; k++) {
1510			ppattern[offset + magicsync +
1511				(j * ETH_ALEN) + k] = macaddr[k];
1512			pmask[len >> 3] |= BIT(len & 7);
1513			len++;
1514		}
1515	}
1516	return len - 1;
1517}
1518
1519/* Setup magic packet patterns in the b44 WOL
1520 * pattern matching filter.
1521 */
1522static void b44_setup_pseudo_magicp(struct b44 *bp)
1523{
1524
1525	u32 val;
1526	int plen0, plen1, plen2;
1527	u8 *pwol_pattern;
1528	u8 pwol_mask[B44_PMASK_SIZE];
1529
1530	pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
1531	if (!pwol_pattern)
1532		return;
1533
1534	/* Ipv4 magic packet pattern - pattern 0.*/
1535	memset(pwol_mask, 0, B44_PMASK_SIZE);
1536	plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1537				  B44_ETHIPV4UDP_HLEN);
1538
1539	bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
1540	bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
1541
1542	/* Raw ethernet II magic packet pattern - pattern 1 */
1543	memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1544	memset(pwol_mask, 0, B44_PMASK_SIZE);
1545	plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1546				  ETH_HLEN);
1547
1548	bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1549		       B44_PATTERN_BASE + B44_PATTERN_SIZE);
1550	bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1551		       B44_PMASK_BASE + B44_PMASK_SIZE);
1552
1553	/* Ipv6 magic packet pattern - pattern 2 */
1554	memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1555	memset(pwol_mask, 0, B44_PMASK_SIZE);
1556	plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1557				  B44_ETHIPV6UDP_HLEN);
1558
1559	bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1560		       B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
1561	bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1562		       B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
1563
1564	kfree(pwol_pattern);
1565
1566	/* set these pattern's lengths: one less than each real length */
1567	val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
1568	bw32(bp, B44_WKUP_LEN, val);
1569
1570	/* enable wakeup pattern matching */
1571	val = br32(bp, B44_DEVCTRL);
1572	bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
1573
1574}
1575
1576#ifdef CONFIG_B44_PCI
1577static void b44_setup_wol_pci(struct b44 *bp)
1578{
1579	u16 val;
1580
1581	if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
1582		bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
1583		pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
1584		pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
1585	}
1586}
1587#else
1588static inline void b44_setup_wol_pci(struct b44 *bp) { }
1589#endif /* CONFIG_B44_PCI */
1590
1591static void b44_setup_wol(struct b44 *bp)
1592{
1593	u32 val;
1594
1595	bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
1596
1597	if (bp->flags & B44_FLAG_B0_ANDLATER) {
1598
1599		bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
1600
1601		val = bp->dev->dev_addr[2] << 24 |
1602			bp->dev->dev_addr[3] << 16 |
1603			bp->dev->dev_addr[4] << 8 |
1604			bp->dev->dev_addr[5];
1605		bw32(bp, B44_ADDR_LO, val);
1606
1607		val = bp->dev->dev_addr[0] << 8 |
1608			bp->dev->dev_addr[1];
1609		bw32(bp, B44_ADDR_HI, val);
1610
1611		val = br32(bp, B44_DEVCTRL);
1612		bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
1613
1614	} else {
1615		b44_setup_pseudo_magicp(bp);
1616	}
1617	b44_setup_wol_pci(bp);
1618}
1619
1620static int b44_close(struct net_device *dev)
1621{
1622	struct b44 *bp = netdev_priv(dev);
1623
1624	netif_stop_queue(dev);
1625
1626	if (bp->flags & B44_FLAG_EXTERNAL_PHY)
1627		phy_stop(dev->phydev);
1628
1629	napi_disable(&bp->napi);
1630
1631	del_timer_sync(&bp->timer);
1632
1633	spin_lock_irq(&bp->lock);
1634
1635	b44_halt(bp);
1636	b44_free_rings(bp);
1637	netif_carrier_off(dev);
1638
1639	spin_unlock_irq(&bp->lock);
1640
1641	free_irq(dev->irq, dev);
1642
1643	if (bp->flags & B44_FLAG_WOL_ENABLE) {
1644		b44_init_hw(bp, B44_PARTIAL_RESET);
1645		b44_setup_wol(bp);
1646	}
1647
1648	b44_free_consistent(bp);
1649
1650	return 0;
1651}
1652
1653static void b44_get_stats64(struct net_device *dev,
1654			    struct rtnl_link_stats64 *nstat)
1655{
1656	struct b44 *bp = netdev_priv(dev);
1657	struct b44_hw_stats *hwstat = &bp->hw_stats;
1658	unsigned int start;
1659
1660	do {
1661		start = u64_stats_fetch_begin(&hwstat->syncp);
1662
1663		/* Convert HW stats into rtnl_link_stats64 stats. */
1664		nstat->rx_packets = hwstat->rx_pkts;
1665		nstat->tx_packets = hwstat->tx_pkts;
1666		nstat->rx_bytes   = hwstat->rx_octets;
1667		nstat->tx_bytes   = hwstat->tx_octets;
1668		nstat->tx_errors  = (hwstat->tx_jabber_pkts +
1669				     hwstat->tx_oversize_pkts +
1670				     hwstat->tx_underruns +
1671				     hwstat->tx_excessive_cols +
1672				     hwstat->tx_late_cols);
1673		nstat->multicast  = hwstat->rx_multicast_pkts;
1674		nstat->collisions = hwstat->tx_total_cols;
1675
1676		nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1677					   hwstat->rx_undersize);
1678		nstat->rx_over_errors   = hwstat->rx_missed_pkts;
1679		nstat->rx_frame_errors  = hwstat->rx_align_errs;
1680		nstat->rx_crc_errors    = hwstat->rx_crc_errs;
1681		nstat->rx_errors        = (hwstat->rx_jabber_pkts +
1682					   hwstat->rx_oversize_pkts +
1683					   hwstat->rx_missed_pkts +
1684					   hwstat->rx_crc_align_errs +
1685					   hwstat->rx_undersize +
1686					   hwstat->rx_crc_errs +
1687					   hwstat->rx_align_errs +
1688					   hwstat->rx_symbol_errs);
1689
1690		nstat->tx_aborted_errors = hwstat->tx_underruns;
1691#if 0
1692		/* Carrier lost counter seems to be broken for some devices */
1693		nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1694#endif
1695	} while (u64_stats_fetch_retry(&hwstat->syncp, start));
1696
1697}
1698
1699static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1700{
1701	struct netdev_hw_addr *ha;
1702	int i, num_ents;
1703
1704	num_ents = min_t(int, netdev_mc_count(dev), B44_MCAST_TABLE_SIZE);
1705	i = 0;
1706	netdev_for_each_mc_addr(ha, dev) {
1707		if (i == num_ents)
1708			break;
1709		__b44_cam_write(bp, ha->addr, i++ + 1);
1710	}
1711	return i+1;
1712}
1713
1714static void __b44_set_rx_mode(struct net_device *dev)
1715{
1716	struct b44 *bp = netdev_priv(dev);
1717	u32 val;
1718
1719	val = br32(bp, B44_RXCONFIG);
1720	val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1721	if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
1722		val |= RXCONFIG_PROMISC;
1723		bw32(bp, B44_RXCONFIG, val);
1724	} else {
1725		unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
1726		int i = 1;
1727
1728		__b44_set_mac_addr(bp);
1729
1730		if ((dev->flags & IFF_ALLMULTI) ||
1731		    (netdev_mc_count(dev) > B44_MCAST_TABLE_SIZE))
1732			val |= RXCONFIG_ALLMULTI;
1733		else
1734			i = __b44_load_mcast(bp, dev);
1735
1736		for (; i < 64; i++)
1737			__b44_cam_write(bp, zero, i);
1738
1739		bw32(bp, B44_RXCONFIG, val);
1740		val = br32(bp, B44_CAM_CTRL);
1741	        bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1742	}
1743}
1744
1745static void b44_set_rx_mode(struct net_device *dev)
1746{
1747	struct b44 *bp = netdev_priv(dev);
1748
1749	spin_lock_irq(&bp->lock);
1750	__b44_set_rx_mode(dev);
1751	spin_unlock_irq(&bp->lock);
1752}
1753
1754static u32 b44_get_msglevel(struct net_device *dev)
1755{
1756	struct b44 *bp = netdev_priv(dev);
1757	return bp->msg_enable;
1758}
1759
1760static void b44_set_msglevel(struct net_device *dev, u32 value)
1761{
1762	struct b44 *bp = netdev_priv(dev);
1763	bp->msg_enable = value;
1764}
1765
1766static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1767{
1768	struct b44 *bp = netdev_priv(dev);
1769	struct ssb_bus *bus = bp->sdev->bus;
1770
1771	strscpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
1772	switch (bus->bustype) {
1773	case SSB_BUSTYPE_PCI:
1774		strscpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
1775		break;
1776	case SSB_BUSTYPE_SSB:
1777		strscpy(info->bus_info, "SSB", sizeof(info->bus_info));
1778		break;
1779	case SSB_BUSTYPE_PCMCIA:
1780	case SSB_BUSTYPE_SDIO:
1781		WARN_ON(1); /* A device with this bus does not exist. */
1782		break;
1783	}
1784}
1785
1786static int b44_nway_reset(struct net_device *dev)
1787{
1788	struct b44 *bp = netdev_priv(dev);
1789	u32 bmcr;
1790	int r;
1791
1792	spin_lock_irq(&bp->lock);
1793	b44_readphy(bp, MII_BMCR, &bmcr);
1794	b44_readphy(bp, MII_BMCR, &bmcr);
1795	r = -EINVAL;
1796	if (bmcr & BMCR_ANENABLE)
1797		r = b44_writephy(bp, MII_BMCR,
1798				 bmcr | BMCR_ANRESTART);
 
 
1799	spin_unlock_irq(&bp->lock);
1800
1801	return r;
1802}
1803
1804static int b44_get_link_ksettings(struct net_device *dev,
1805				  struct ethtool_link_ksettings *cmd)
1806{
1807	struct b44 *bp = netdev_priv(dev);
1808	u32 supported, advertising;
1809
1810	if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
1811		BUG_ON(!dev->phydev);
1812		phy_ethtool_ksettings_get(dev->phydev, cmd);
1813
1814		return 0;
1815	}
1816
1817	supported = (SUPPORTED_Autoneg);
1818	supported |= (SUPPORTED_100baseT_Half |
1819		      SUPPORTED_100baseT_Full |
1820		      SUPPORTED_10baseT_Half |
1821		      SUPPORTED_10baseT_Full |
1822		      SUPPORTED_MII);
1823
1824	advertising = 0;
1825	if (bp->flags & B44_FLAG_ADV_10HALF)
1826		advertising |= ADVERTISED_10baseT_Half;
1827	if (bp->flags & B44_FLAG_ADV_10FULL)
1828		advertising |= ADVERTISED_10baseT_Full;
1829	if (bp->flags & B44_FLAG_ADV_100HALF)
1830		advertising |= ADVERTISED_100baseT_Half;
1831	if (bp->flags & B44_FLAG_ADV_100FULL)
1832		advertising |= ADVERTISED_100baseT_Full;
1833	advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1834	cmd->base.speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1835		SPEED_100 : SPEED_10;
1836	cmd->base.duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1837		DUPLEX_FULL : DUPLEX_HALF;
1838	cmd->base.port = 0;
1839	cmd->base.phy_address = bp->phy_addr;
1840	cmd->base.autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1841		AUTONEG_DISABLE : AUTONEG_ENABLE;
1842	if (cmd->base.autoneg == AUTONEG_ENABLE)
1843		advertising |= ADVERTISED_Autoneg;
1844
1845	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1846						supported);
1847	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1848						advertising);
1849
1850	if (!netif_running(dev)){
1851		cmd->base.speed = 0;
1852		cmd->base.duplex = 0xff;
1853	}
1854
1855	return 0;
1856}
1857
1858static int b44_set_link_ksettings(struct net_device *dev,
1859				  const struct ethtool_link_ksettings *cmd)
1860{
1861	struct b44 *bp = netdev_priv(dev);
1862	u32 speed;
1863	int ret;
1864	u32 advertising;
1865
1866	if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
1867		BUG_ON(!dev->phydev);
1868		spin_lock_irq(&bp->lock);
1869		if (netif_running(dev))
1870			b44_setup_phy(bp);
1871
1872		ret = phy_ethtool_ksettings_set(dev->phydev, cmd);
1873
1874		spin_unlock_irq(&bp->lock);
1875
1876		return ret;
1877	}
1878
1879	speed = cmd->base.speed;
1880
1881	ethtool_convert_link_mode_to_legacy_u32(&advertising,
1882						cmd->link_modes.advertising);
1883
1884	/* We do not support gigabit. */
1885	if (cmd->base.autoneg == AUTONEG_ENABLE) {
1886		if (advertising &
1887		    (ADVERTISED_1000baseT_Half |
1888		     ADVERTISED_1000baseT_Full))
1889			return -EINVAL;
1890	} else if ((speed != SPEED_100 &&
1891		    speed != SPEED_10) ||
1892		   (cmd->base.duplex != DUPLEX_HALF &&
1893		    cmd->base.duplex != DUPLEX_FULL)) {
1894			return -EINVAL;
1895	}
1896
1897	spin_lock_irq(&bp->lock);
1898
1899	if (cmd->base.autoneg == AUTONEG_ENABLE) {
1900		bp->flags &= ~(B44_FLAG_FORCE_LINK |
1901			       B44_FLAG_100_BASE_T |
1902			       B44_FLAG_FULL_DUPLEX |
1903			       B44_FLAG_ADV_10HALF |
1904			       B44_FLAG_ADV_10FULL |
1905			       B44_FLAG_ADV_100HALF |
1906			       B44_FLAG_ADV_100FULL);
1907		if (advertising == 0) {
1908			bp->flags |= (B44_FLAG_ADV_10HALF |
1909				      B44_FLAG_ADV_10FULL |
1910				      B44_FLAG_ADV_100HALF |
1911				      B44_FLAG_ADV_100FULL);
1912		} else {
1913			if (advertising & ADVERTISED_10baseT_Half)
1914				bp->flags |= B44_FLAG_ADV_10HALF;
1915			if (advertising & ADVERTISED_10baseT_Full)
1916				bp->flags |= B44_FLAG_ADV_10FULL;
1917			if (advertising & ADVERTISED_100baseT_Half)
1918				bp->flags |= B44_FLAG_ADV_100HALF;
1919			if (advertising & ADVERTISED_100baseT_Full)
1920				bp->flags |= B44_FLAG_ADV_100FULL;
1921		}
1922	} else {
1923		bp->flags |= B44_FLAG_FORCE_LINK;
1924		bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
1925		if (speed == SPEED_100)
1926			bp->flags |= B44_FLAG_100_BASE_T;
1927		if (cmd->base.duplex == DUPLEX_FULL)
1928			bp->flags |= B44_FLAG_FULL_DUPLEX;
1929	}
1930
1931	if (netif_running(dev))
1932		b44_setup_phy(bp);
1933
1934	spin_unlock_irq(&bp->lock);
1935
1936	return 0;
1937}
1938
1939static void b44_get_ringparam(struct net_device *dev,
1940			      struct ethtool_ringparam *ering,
1941			      struct kernel_ethtool_ringparam *kernel_ering,
1942			      struct netlink_ext_ack *extack)
1943{
1944	struct b44 *bp = netdev_priv(dev);
1945
1946	ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1947	ering->rx_pending = bp->rx_pending;
1948
1949	/* XXX ethtool lacks a tx_max_pending, oops... */
1950}
1951
1952static int b44_set_ringparam(struct net_device *dev,
1953			     struct ethtool_ringparam *ering,
1954			     struct kernel_ethtool_ringparam *kernel_ering,
1955			     struct netlink_ext_ack *extack)
1956{
1957	struct b44 *bp = netdev_priv(dev);
1958
1959	if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1960	    (ering->rx_mini_pending != 0) ||
1961	    (ering->rx_jumbo_pending != 0) ||
1962	    (ering->tx_pending > B44_TX_RING_SIZE - 1))
1963		return -EINVAL;
1964
1965	spin_lock_irq(&bp->lock);
1966
1967	bp->rx_pending = ering->rx_pending;
1968	bp->tx_pending = ering->tx_pending;
1969
1970	b44_halt(bp);
1971	b44_init_rings(bp);
1972	b44_init_hw(bp, B44_FULL_RESET);
1973	netif_wake_queue(bp->dev);
1974	spin_unlock_irq(&bp->lock);
1975
1976	b44_enable_ints(bp);
1977
1978	return 0;
1979}
1980
1981static void b44_get_pauseparam(struct net_device *dev,
1982				struct ethtool_pauseparam *epause)
1983{
1984	struct b44 *bp = netdev_priv(dev);
1985
1986	epause->autoneg =
1987		(bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1988	epause->rx_pause =
1989		(bp->flags & B44_FLAG_RX_PAUSE) != 0;
1990	epause->tx_pause =
1991		(bp->flags & B44_FLAG_TX_PAUSE) != 0;
1992}
1993
1994static int b44_set_pauseparam(struct net_device *dev,
1995				struct ethtool_pauseparam *epause)
1996{
1997	struct b44 *bp = netdev_priv(dev);
1998
1999	spin_lock_irq(&bp->lock);
2000	if (epause->autoneg)
2001		bp->flags |= B44_FLAG_PAUSE_AUTO;
2002	else
2003		bp->flags &= ~B44_FLAG_PAUSE_AUTO;
2004	if (epause->rx_pause)
2005		bp->flags |= B44_FLAG_RX_PAUSE;
2006	else
2007		bp->flags &= ~B44_FLAG_RX_PAUSE;
2008	if (epause->tx_pause)
2009		bp->flags |= B44_FLAG_TX_PAUSE;
2010	else
2011		bp->flags &= ~B44_FLAG_TX_PAUSE;
2012	if (bp->flags & B44_FLAG_PAUSE_AUTO) {
2013		b44_halt(bp);
2014		b44_init_rings(bp);
2015		b44_init_hw(bp, B44_FULL_RESET);
2016	} else {
2017		__b44_set_flow_ctrl(bp, bp->flags);
2018	}
2019	spin_unlock_irq(&bp->lock);
2020
2021	b44_enable_ints(bp);
2022
2023	return 0;
2024}
2025
2026static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2027{
2028	switch(stringset) {
2029	case ETH_SS_STATS:
2030		memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
2031		break;
2032	}
2033}
2034
2035static int b44_get_sset_count(struct net_device *dev, int sset)
2036{
2037	switch (sset) {
2038	case ETH_SS_STATS:
2039		return ARRAY_SIZE(b44_gstrings);
2040	default:
2041		return -EOPNOTSUPP;
2042	}
2043}
2044
2045static void b44_get_ethtool_stats(struct net_device *dev,
2046				  struct ethtool_stats *stats, u64 *data)
2047{
2048	struct b44 *bp = netdev_priv(dev);
2049	struct b44_hw_stats *hwstat = &bp->hw_stats;
2050	u64 *data_src, *data_dst;
2051	unsigned int start;
2052	u32 i;
2053
2054	spin_lock_irq(&bp->lock);
2055	b44_stats_update(bp);
2056	spin_unlock_irq(&bp->lock);
2057
2058	do {
2059		data_src = &hwstat->tx_good_octets;
2060		data_dst = data;
2061		start = u64_stats_fetch_begin(&hwstat->syncp);
2062
2063		for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
2064			*data_dst++ = *data_src++;
2065
2066	} while (u64_stats_fetch_retry(&hwstat->syncp, start));
2067}
2068
2069static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2070{
2071	struct b44 *bp = netdev_priv(dev);
2072
2073	wol->supported = WAKE_MAGIC;
2074	if (bp->flags & B44_FLAG_WOL_ENABLE)
2075		wol->wolopts = WAKE_MAGIC;
2076	else
2077		wol->wolopts = 0;
2078	memset(&wol->sopass, 0, sizeof(wol->sopass));
2079}
2080
2081static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2082{
2083	struct b44 *bp = netdev_priv(dev);
2084
2085	spin_lock_irq(&bp->lock);
2086	if (wol->wolopts & WAKE_MAGIC)
2087		bp->flags |= B44_FLAG_WOL_ENABLE;
2088	else
2089		bp->flags &= ~B44_FLAG_WOL_ENABLE;
2090	spin_unlock_irq(&bp->lock);
2091
2092	device_set_wakeup_enable(bp->sdev->dev, wol->wolopts & WAKE_MAGIC);
2093	return 0;
2094}
2095
2096static const struct ethtool_ops b44_ethtool_ops = {
2097	.get_drvinfo		= b44_get_drvinfo,
2098	.nway_reset		= b44_nway_reset,
2099	.get_link		= ethtool_op_get_link,
2100	.get_wol		= b44_get_wol,
2101	.set_wol		= b44_set_wol,
2102	.get_ringparam		= b44_get_ringparam,
2103	.set_ringparam		= b44_set_ringparam,
2104	.get_pauseparam		= b44_get_pauseparam,
2105	.set_pauseparam		= b44_set_pauseparam,
2106	.get_msglevel		= b44_get_msglevel,
2107	.set_msglevel		= b44_set_msglevel,
2108	.get_strings		= b44_get_strings,
2109	.get_sset_count		= b44_get_sset_count,
2110	.get_ethtool_stats	= b44_get_ethtool_stats,
2111	.get_link_ksettings	= b44_get_link_ksettings,
2112	.set_link_ksettings	= b44_set_link_ksettings,
2113};
2114
2115static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2116{
2117	struct b44 *bp = netdev_priv(dev);
2118	int err = -EINVAL;
2119
2120	if (!netif_running(dev))
2121		goto out;
2122
2123	spin_lock_irq(&bp->lock);
2124	if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
2125		BUG_ON(!dev->phydev);
2126		err = phy_mii_ioctl(dev->phydev, ifr, cmd);
2127	} else {
2128		err = generic_mii_ioctl(&bp->mii_if, if_mii(ifr), cmd, NULL);
2129	}
2130	spin_unlock_irq(&bp->lock);
2131out:
2132	return err;
2133}
2134
2135static int b44_get_invariants(struct b44 *bp)
2136{
2137	struct ssb_device *sdev = bp->sdev;
2138	int err = 0;
2139	u8 *addr;
2140
2141	bp->dma_offset = ssb_dma_translation(sdev);
2142
2143	if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
2144	    instance > 1) {
2145		addr = sdev->bus->sprom.et1mac;
2146		bp->phy_addr = sdev->bus->sprom.et1phyaddr;
2147	} else {
2148		addr = sdev->bus->sprom.et0mac;
2149		bp->phy_addr = sdev->bus->sprom.et0phyaddr;
2150	}
2151	/* Some ROMs have buggy PHY addresses with the high
2152	 * bits set (sign extension?). Truncate them to a
2153	 * valid PHY address. */
2154	bp->phy_addr &= 0x1F;
2155
2156	eth_hw_addr_set(bp->dev, addr);
2157
2158	if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
2159		pr_err("Invalid MAC address found in EEPROM\n");
2160		return -EINVAL;
2161	}
2162
2163	bp->imask = IMASK_DEF;
2164
2165	/* XXX - really required?
2166	   bp->flags |= B44_FLAG_BUGGY_TXPTR;
2167	*/
2168
2169	if (bp->sdev->id.revision >= 7)
2170		bp->flags |= B44_FLAG_B0_ANDLATER;
2171
2172	return err;
2173}
2174
2175static const struct net_device_ops b44_netdev_ops = {
2176	.ndo_open		= b44_open,
2177	.ndo_stop		= b44_close,
2178	.ndo_start_xmit		= b44_start_xmit,
2179	.ndo_get_stats64	= b44_get_stats64,
2180	.ndo_set_rx_mode	= b44_set_rx_mode,
2181	.ndo_set_mac_address	= b44_set_mac_addr,
2182	.ndo_validate_addr	= eth_validate_addr,
2183	.ndo_eth_ioctl		= b44_ioctl,
2184	.ndo_tx_timeout		= b44_tx_timeout,
2185	.ndo_change_mtu		= b44_change_mtu,
2186#ifdef CONFIG_NET_POLL_CONTROLLER
2187	.ndo_poll_controller	= b44_poll_controller,
2188#endif
2189};
2190
2191static void b44_adjust_link(struct net_device *dev)
2192{
2193	struct b44 *bp = netdev_priv(dev);
2194	struct phy_device *phydev = dev->phydev;
2195	bool status_changed = false;
2196
2197	BUG_ON(!phydev);
2198
2199	if (bp->old_link != phydev->link) {
2200		status_changed = true;
2201		bp->old_link = phydev->link;
2202	}
2203
2204	/* reflect duplex change */
2205	if (phydev->link) {
2206		if ((phydev->duplex == DUPLEX_HALF) &&
2207		    (bp->flags & B44_FLAG_FULL_DUPLEX)) {
2208			status_changed = true;
2209			bp->flags &= ~B44_FLAG_FULL_DUPLEX;
2210		} else if ((phydev->duplex == DUPLEX_FULL) &&
2211			   !(bp->flags & B44_FLAG_FULL_DUPLEX)) {
2212			status_changed = true;
2213			bp->flags |= B44_FLAG_FULL_DUPLEX;
2214		}
2215	}
2216
2217	if (status_changed) {
2218		u32 val = br32(bp, B44_TX_CTRL);
2219		if (bp->flags & B44_FLAG_FULL_DUPLEX)
2220			val |= TX_CTRL_DUPLEX;
2221		else
2222			val &= ~TX_CTRL_DUPLEX;
2223		bw32(bp, B44_TX_CTRL, val);
2224		phy_print_status(phydev);
2225	}
2226}
2227
2228static int b44_register_phy_one(struct b44 *bp)
2229{
2230	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
2231	struct mii_bus *mii_bus;
2232	struct ssb_device *sdev = bp->sdev;
2233	struct phy_device *phydev;
2234	char bus_id[MII_BUS_ID_SIZE + 3];
2235	struct ssb_sprom *sprom = &sdev->bus->sprom;
2236	int err;
2237
2238	mii_bus = mdiobus_alloc();
2239	if (!mii_bus) {
2240		dev_err(sdev->dev, "mdiobus_alloc() failed\n");
2241		err = -ENOMEM;
2242		goto err_out;
2243	}
2244
2245	mii_bus->priv = bp;
2246	mii_bus->read = b44_mdio_read_phylib;
2247	mii_bus->write = b44_mdio_write_phylib;
2248	mii_bus->name = "b44_eth_mii";
2249	mii_bus->parent = sdev->dev;
2250	mii_bus->phy_mask = ~(1 << bp->phy_addr);
2251	snprintf(mii_bus->id, MII_BUS_ID_SIZE, "%x", instance);
2252
2253	bp->mii_bus = mii_bus;
2254
2255	err = mdiobus_register(mii_bus);
2256	if (err) {
2257		dev_err(sdev->dev, "failed to register MII bus\n");
2258		goto err_out_mdiobus;
2259	}
2260
2261	if (!mdiobus_is_registered_device(bp->mii_bus, bp->phy_addr) &&
2262	    (sprom->boardflags_lo & (B44_BOARDFLAG_ROBO | B44_BOARDFLAG_ADM))) {
2263
2264		dev_info(sdev->dev,
2265			 "could not find PHY at %i, use fixed one\n",
2266			 bp->phy_addr);
2267
2268		bp->phy_addr = 0;
2269		snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, "fixed-0",
2270			 bp->phy_addr);
2271	} else {
2272		snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, mii_bus->id,
2273			 bp->phy_addr);
2274	}
2275
2276	phydev = phy_connect(bp->dev, bus_id, &b44_adjust_link,
2277			     PHY_INTERFACE_MODE_MII);
2278	if (IS_ERR(phydev)) {
2279		dev_err(sdev->dev, "could not attach PHY at %i\n",
2280			bp->phy_addr);
2281		err = PTR_ERR(phydev);
2282		goto err_out_mdiobus_unregister;
2283	}
2284
2285	/* mask with MAC supported features */
2286	linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, mask);
2287	linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, mask);
2288	linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, mask);
2289	linkmode_set_bit(ETHTOOL_LINK_MODE_MII_BIT, mask);
2290	linkmode_and(phydev->supported, phydev->supported, mask);
2291	linkmode_copy(phydev->advertising, phydev->supported);
2292
2293	bp->old_link = 0;
2294	bp->phy_addr = phydev->mdio.addr;
2295
2296	phy_attached_info(phydev);
2297
2298	return 0;
2299
2300err_out_mdiobus_unregister:
2301	mdiobus_unregister(mii_bus);
2302
2303err_out_mdiobus:
2304	mdiobus_free(mii_bus);
2305
2306err_out:
2307	return err;
2308}
2309
2310static void b44_unregister_phy_one(struct b44 *bp)
2311{
2312	struct net_device *dev = bp->dev;
2313	struct mii_bus *mii_bus = bp->mii_bus;
2314
2315	phy_disconnect(dev->phydev);
2316	mdiobus_unregister(mii_bus);
2317	mdiobus_free(mii_bus);
2318}
2319
2320static int b44_init_one(struct ssb_device *sdev,
2321			const struct ssb_device_id *ent)
2322{
2323	struct net_device *dev;
2324	struct b44 *bp;
2325	int err;
2326
2327	instance++;
2328
2329	dev = alloc_etherdev(sizeof(*bp));
2330	if (!dev) {
2331		err = -ENOMEM;
2332		goto out;
2333	}
2334
2335	SET_NETDEV_DEV(dev, sdev->dev);
2336
2337	/* No interesting netdevice features in this card... */
2338	dev->features |= 0;
2339
2340	bp = netdev_priv(dev);
2341	bp->sdev = sdev;
2342	bp->dev = dev;
2343	bp->force_copybreak = 0;
2344
2345	bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
2346
2347	spin_lock_init(&bp->lock);
2348	u64_stats_init(&bp->hw_stats.syncp);
2349
2350	bp->rx_pending = B44_DEF_RX_RING_PENDING;
2351	bp->tx_pending = B44_DEF_TX_RING_PENDING;
2352
2353	dev->netdev_ops = &b44_netdev_ops;
2354	netif_napi_add(dev, &bp->napi, b44_poll);
2355	dev->watchdog_timeo = B44_TX_TIMEOUT;
2356	dev->min_mtu = B44_MIN_MTU;
2357	dev->max_mtu = B44_MAX_MTU;
2358	dev->irq = sdev->irq;
2359	dev->ethtool_ops = &b44_ethtool_ops;
2360
2361	err = ssb_bus_powerup(sdev->bus, 0);
2362	if (err) {
2363		dev_err(sdev->dev,
2364			"Failed to powerup the bus\n");
2365		goto err_out_free_dev;
2366	}
2367
2368	err = dma_set_mask_and_coherent(sdev->dma_dev, DMA_BIT_MASK(30));
2369	if (err) {
2370		dev_err(sdev->dev,
2371			"Required 30BIT DMA mask unsupported by the system\n");
2372		goto err_out_powerdown;
2373	}
2374
2375	err = b44_get_invariants(bp);
2376	if (err) {
2377		dev_err(sdev->dev,
2378			"Problem fetching invariants of chip, aborting\n");
2379		goto err_out_powerdown;
2380	}
2381
2382	if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) {
2383		dev_err(sdev->dev, "No PHY present on this MAC, aborting\n");
2384		err = -ENODEV;
2385		goto err_out_powerdown;
2386	}
2387
2388	bp->mii_if.dev = dev;
2389	bp->mii_if.mdio_read = b44_mdio_read_mii;
2390	bp->mii_if.mdio_write = b44_mdio_write_mii;
2391	bp->mii_if.phy_id = bp->phy_addr;
2392	bp->mii_if.phy_id_mask = 0x1f;
2393	bp->mii_if.reg_num_mask = 0x1f;
2394
2395	/* By default, advertise all speed/duplex settings. */
2396	bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2397		      B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2398
2399	/* By default, auto-negotiate PAUSE. */
2400	bp->flags |= B44_FLAG_PAUSE_AUTO;
2401
2402	err = register_netdev(dev);
2403	if (err) {
2404		dev_err(sdev->dev, "Cannot register net device, aborting\n");
2405		goto err_out_powerdown;
2406	}
2407
2408	netif_carrier_off(dev);
2409
2410	ssb_set_drvdata(sdev, dev);
2411
2412	/* Chip reset provides power to the b44 MAC & PCI cores, which
2413	 * is necessary for MAC register access.
2414	 */
2415	b44_chip_reset(bp, B44_CHIP_RESET_FULL);
2416
2417	/* do a phy reset to test if there is an active phy */
2418	err = b44_phy_reset(bp);
2419	if (err < 0) {
2420		dev_err(sdev->dev, "phy reset failed\n");
2421		goto err_out_unregister_netdev;
2422	}
2423
2424	if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
2425		err = b44_register_phy_one(bp);
2426		if (err) {
2427			dev_err(sdev->dev, "Cannot register PHY, aborting\n");
2428			goto err_out_unregister_netdev;
2429		}
2430	}
2431
2432	device_set_wakeup_capable(sdev->dev, true);
2433	netdev_info(dev, "%s %pM\n", DRV_DESCRIPTION, dev->dev_addr);
2434
2435	return 0;
2436
2437err_out_unregister_netdev:
2438	unregister_netdev(dev);
2439err_out_powerdown:
2440	ssb_bus_may_powerdown(sdev->bus);
2441
2442err_out_free_dev:
2443	netif_napi_del(&bp->napi);
2444	free_netdev(dev);
2445
2446out:
2447	return err;
2448}
2449
2450static void b44_remove_one(struct ssb_device *sdev)
2451{
2452	struct net_device *dev = ssb_get_drvdata(sdev);
2453	struct b44 *bp = netdev_priv(dev);
2454
2455	unregister_netdev(dev);
2456	if (bp->flags & B44_FLAG_EXTERNAL_PHY)
2457		b44_unregister_phy_one(bp);
2458	ssb_device_disable(sdev, 0);
2459	ssb_bus_may_powerdown(sdev->bus);
2460	netif_napi_del(&bp->napi);
2461	free_netdev(dev);
2462	ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2463	ssb_set_drvdata(sdev, NULL);
2464}
2465
2466static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
2467{
2468	struct net_device *dev = ssb_get_drvdata(sdev);
2469	struct b44 *bp = netdev_priv(dev);
2470
2471	if (!netif_running(dev))
2472		return 0;
2473
2474	del_timer_sync(&bp->timer);
2475
2476	spin_lock_irq(&bp->lock);
2477
2478	b44_halt(bp);
2479	netif_carrier_off(bp->dev);
2480	netif_device_detach(bp->dev);
2481	b44_free_rings(bp);
2482
2483	spin_unlock_irq(&bp->lock);
2484
2485	free_irq(dev->irq, dev);
2486	if (bp->flags & B44_FLAG_WOL_ENABLE) {
2487		b44_init_hw(bp, B44_PARTIAL_RESET);
2488		b44_setup_wol(bp);
2489	}
2490
2491	ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2492	return 0;
2493}
2494
2495static int b44_resume(struct ssb_device *sdev)
2496{
2497	struct net_device *dev = ssb_get_drvdata(sdev);
2498	struct b44 *bp = netdev_priv(dev);
2499	int rc = 0;
2500
2501	rc = ssb_bus_powerup(sdev->bus, 0);
2502	if (rc) {
2503		dev_err(sdev->dev,
2504			"Failed to powerup the bus\n");
2505		return rc;
2506	}
2507
2508	if (!netif_running(dev))
2509		return 0;
2510
2511	spin_lock_irq(&bp->lock);
2512	b44_init_rings(bp);
2513	b44_init_hw(bp, B44_FULL_RESET);
2514	spin_unlock_irq(&bp->lock);
2515
2516	/*
2517	 * As a shared interrupt, the handler can be called immediately. To be
2518	 * able to check the interrupt status the hardware must already be
2519	 * powered back on (b44_init_hw).
2520	 */
2521	rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
2522	if (rc) {
2523		netdev_err(dev, "request_irq failed\n");
2524		spin_lock_irq(&bp->lock);
2525		b44_halt(bp);
2526		b44_free_rings(bp);
2527		spin_unlock_irq(&bp->lock);
2528		return rc;
2529	}
2530
2531	netif_device_attach(bp->dev);
2532
2533	b44_enable_ints(bp);
2534	netif_wake_queue(dev);
2535
2536	mod_timer(&bp->timer, jiffies + 1);
2537
2538	return 0;
2539}
2540
2541static struct ssb_driver b44_ssb_driver = {
2542	.name		= DRV_MODULE_NAME,
2543	.id_table	= b44_ssb_tbl,
2544	.probe		= b44_init_one,
2545	.remove		= b44_remove_one,
2546	.suspend	= b44_suspend,
2547	.resume		= b44_resume,
2548};
2549
2550static inline int __init b44_pci_init(void)
2551{
2552	int err = 0;
2553#ifdef CONFIG_B44_PCI
2554	err = ssb_pcihost_register(&b44_pci_driver);
2555#endif
2556	return err;
2557}
2558
2559static inline void b44_pci_exit(void)
2560{
2561#ifdef CONFIG_B44_PCI
2562	ssb_pcihost_unregister(&b44_pci_driver);
2563#endif
2564}
2565
2566static int __init b44_init(void)
2567{
2568	unsigned int dma_desc_align_size = dma_get_cache_alignment();
2569	int err;
2570
2571	/* Setup paramaters for syncing RX/TX DMA descriptors */
2572	dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2573
2574	err = b44_pci_init();
2575	if (err)
2576		return err;
2577	err = ssb_driver_register(&b44_ssb_driver);
2578	if (err)
2579		b44_pci_exit();
2580	return err;
2581}
2582
2583static void __exit b44_cleanup(void)
2584{
2585	ssb_driver_unregister(&b44_ssb_driver);
2586	b44_pci_exit();
2587}
2588
2589module_init(b44_init);
2590module_exit(b44_cleanup);
2591