net: convert print_mac to %pM
[linux-2.6.git] / drivers / net / b44.c
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 <mb@bu3sch.de>
9  *
10  * Distribute under GPL.
11  */
12
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/types.h>
17 #include <linux/netdevice.h>
18 #include <linux/ethtool.h>
19 #include <linux/mii.h>
20 #include <linux/if_ether.h>
21 #include <linux/if_vlan.h>
22 #include <linux/etherdevice.h>
23 #include <linux/pci.h>
24 #include <linux/delay.h>
25 #include <linux/init.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/ssb/ssb.h>
28
29 #include <asm/uaccess.h>
30 #include <asm/io.h>
31 #include <asm/irq.h>
32
33
34 #include "b44.h"
35
36 #define DRV_MODULE_NAME         "b44"
37 #define PFX DRV_MODULE_NAME     ": "
38 #define DRV_MODULE_VERSION      "2.0"
39
40 #define B44_DEF_MSG_ENABLE        \
41         (NETIF_MSG_DRV          | \
42          NETIF_MSG_PROBE        | \
43          NETIF_MSG_LINK         | \
44          NETIF_MSG_TIMER        | \
45          NETIF_MSG_IFDOWN       | \
46          NETIF_MSG_IFUP         | \
47          NETIF_MSG_RX_ERR       | \
48          NETIF_MSG_TX_ERR)
49
50 /* length of time before we decide the hardware is borked,
51  * and dev->tx_timeout() should be called to fix the problem
52  */
53 #define B44_TX_TIMEOUT                  (5 * HZ)
54
55 /* hardware minimum and maximum for a single frame's data payload */
56 #define B44_MIN_MTU                     60
57 #define B44_MAX_MTU                     1500
58
59 #define B44_RX_RING_SIZE                512
60 #define B44_DEF_RX_RING_PENDING         200
61 #define B44_RX_RING_BYTES       (sizeof(struct dma_desc) * \
62                                  B44_RX_RING_SIZE)
63 #define B44_TX_RING_SIZE                512
64 #define B44_DEF_TX_RING_PENDING         (B44_TX_RING_SIZE - 1)
65 #define B44_TX_RING_BYTES       (sizeof(struct dma_desc) * \
66                                  B44_TX_RING_SIZE)
67
68 #define TX_RING_GAP(BP) \
69         (B44_TX_RING_SIZE - (BP)->tx_pending)
70 #define TX_BUFFS_AVAIL(BP)                                              \
71         (((BP)->tx_cons <= (BP)->tx_prod) ?                             \
72           (BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod :            \
73           (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP))
74 #define NEXT_TX(N)              (((N) + 1) & (B44_TX_RING_SIZE - 1))
75
76 #define RX_PKT_OFFSET           30
77 #define RX_PKT_BUF_SZ           (1536 + RX_PKT_OFFSET + 64)
78
79 /* minimum number of free TX descriptors required to wake up TX process */
80 #define B44_TX_WAKEUP_THRESH            (B44_TX_RING_SIZE / 4)
81
82 /* b44 internal pattern match filter info */
83 #define B44_PATTERN_BASE        0x400
84 #define B44_PATTERN_SIZE        0x80
85 #define B44_PMASK_BASE          0x600
86 #define B44_PMASK_SIZE          0x10
87 #define B44_MAX_PATTERNS        16
88 #define B44_ETHIPV6UDP_HLEN     62
89 #define B44_ETHIPV4UDP_HLEN     42
90
91 static char version[] __devinitdata =
92         DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION "\n";
93
94 MODULE_AUTHOR("Felix Fietkau, Florian Schirmer, Pekka Pietikainen, David S. Miller");
95 MODULE_DESCRIPTION("Broadcom 44xx/47xx 10/100 PCI ethernet driver");
96 MODULE_LICENSE("GPL");
97 MODULE_VERSION(DRV_MODULE_VERSION);
98
99 static int b44_debug = -1;      /* -1 == use B44_DEF_MSG_ENABLE as value */
100 module_param(b44_debug, int, 0);
101 MODULE_PARM_DESC(b44_debug, "B44 bitmapped debugging message enable value");
102
103
104 #ifdef CONFIG_B44_PCI
105 static const struct pci_device_id b44_pci_tbl[] = {
106         { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401) },
107         { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0) },
108         { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1) },
109         { 0 } /* terminate list with empty entry */
110 };
111 MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
112
113 static struct pci_driver b44_pci_driver = {
114         .name           = DRV_MODULE_NAME,
115         .id_table       = b44_pci_tbl,
116 };
117 #endif /* CONFIG_B44_PCI */
118
119 static const struct ssb_device_id b44_ssb_tbl[] = {
120         SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET, SSB_ANY_REV),
121         SSB_DEVTABLE_END
122 };
123 MODULE_DEVICE_TABLE(ssb, b44_ssb_tbl);
124
125 static void b44_halt(struct b44 *);
126 static void b44_init_rings(struct b44 *);
127
128 #define B44_FULL_RESET          1
129 #define B44_FULL_RESET_SKIP_PHY 2
130 #define B44_PARTIAL_RESET       3
131 #define B44_CHIP_RESET_FULL     4
132 #define B44_CHIP_RESET_PARTIAL  5
133
134 static void b44_init_hw(struct b44 *, int);
135
136 static int dma_desc_align_mask;
137 static int dma_desc_sync_size;
138 static int instance;
139
140 static const char b44_gstrings[][ETH_GSTRING_LEN] = {
141 #define _B44(x...)      # x,
142 B44_STAT_REG_DECLARE
143 #undef _B44
144 };
145
146 static 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         ssb_dma_sync_single_range_for_device(sdev, dma_base,
152                                              offset & dma_desc_align_mask,
153                                              dma_desc_sync_size, dir);
154 }
155
156 static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
157                                              dma_addr_t dma_base,
158                                              unsigned long offset,
159                                              enum dma_data_direction dir)
160 {
161         ssb_dma_sync_single_range_for_cpu(sdev, dma_base,
162                                           offset & dma_desc_align_mask,
163                                           dma_desc_sync_size, dir);
164 }
165
166 static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
167 {
168         return ssb_read32(bp->sdev, reg);
169 }
170
171 static inline void bw32(const struct b44 *bp,
172                         unsigned long reg, unsigned long val)
173 {
174         ssb_write32(bp->sdev, reg, val);
175 }
176
177 static int b44_wait_bit(struct b44 *bp, unsigned long reg,
178                         u32 bit, unsigned long timeout, const int clear)
179 {
180         unsigned long i;
181
182         for (i = 0; i < timeout; i++) {
183                 u32 val = br32(bp, reg);
184
185                 if (clear && !(val & bit))
186                         break;
187                 if (!clear && (val & bit))
188                         break;
189                 udelay(10);
190         }
191         if (i == timeout) {
192                 printk(KERN_ERR PFX "%s: BUG!  Timeout waiting for bit %08x of register "
193                        "%lx to %s.\n",
194                        bp->dev->name,
195                        bit, reg,
196                        (clear ? "clear" : "set"));
197                 return -ENODEV;
198         }
199         return 0;
200 }
201
202 static inline void __b44_cam_read(struct b44 *bp, unsigned char *data, int index)
203 {
204         u32 val;
205
206         bw32(bp, B44_CAM_CTRL, (CAM_CTRL_READ |
207                             (index << CAM_CTRL_INDEX_SHIFT)));
208
209         b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
210
211         val = br32(bp, B44_CAM_DATA_LO);
212
213         data[2] = (val >> 24) & 0xFF;
214         data[3] = (val >> 16) & 0xFF;
215         data[4] = (val >> 8) & 0xFF;
216         data[5] = (val >> 0) & 0xFF;
217
218         val = br32(bp, B44_CAM_DATA_HI);
219
220         data[0] = (val >> 8) & 0xFF;
221         data[1] = (val >> 0) & 0xFF;
222 }
223
224 static inline void __b44_cam_write(struct b44 *bp, unsigned char *data, int index)
225 {
226         u32 val;
227
228         val  = ((u32) data[2]) << 24;
229         val |= ((u32) data[3]) << 16;
230         val |= ((u32) data[4]) <<  8;
231         val |= ((u32) data[5]) <<  0;
232         bw32(bp, B44_CAM_DATA_LO, val);
233         val = (CAM_DATA_HI_VALID |
234                (((u32) data[0]) << 8) |
235                (((u32) data[1]) << 0));
236         bw32(bp, B44_CAM_DATA_HI, val);
237         bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE |
238                             (index << CAM_CTRL_INDEX_SHIFT)));
239         b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
240 }
241
242 static inline void __b44_disable_ints(struct b44 *bp)
243 {
244         bw32(bp, B44_IMASK, 0);
245 }
246
247 static void b44_disable_ints(struct b44 *bp)
248 {
249         __b44_disable_ints(bp);
250
251         /* Flush posted writes. */
252         br32(bp, B44_IMASK);
253 }
254
255 static void b44_enable_ints(struct b44 *bp)
256 {
257         bw32(bp, B44_IMASK, bp->imask);
258 }
259
260 static int __b44_readphy(struct b44 *bp, int phy_addr, int reg, u32 *val)
261 {
262         int err;
263
264         bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
265         bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
266                              (MDIO_OP_READ << MDIO_DATA_OP_SHIFT) |
267                              (phy_addr << MDIO_DATA_PMD_SHIFT) |
268                              (reg << MDIO_DATA_RA_SHIFT) |
269                              (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT)));
270         err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
271         *val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
272
273         return err;
274 }
275
276 static int __b44_writephy(struct b44 *bp, int phy_addr, int reg, u32 val)
277 {
278         bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
279         bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
280                              (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) |
281                              (phy_addr << MDIO_DATA_PMD_SHIFT) |
282                              (reg << MDIO_DATA_RA_SHIFT) |
283                              (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) |
284                              (val & MDIO_DATA_DATA)));
285         return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
286 }
287
288 static inline int b44_readphy(struct b44 *bp, int reg, u32 *val)
289 {
290         if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
291                 return 0;
292
293         return __b44_readphy(bp, bp->phy_addr, reg, val);
294 }
295
296 static inline int b44_writephy(struct b44 *bp, int reg, u32 val)
297 {
298         if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
299                 return 0;
300
301         return __b44_writephy(bp, bp->phy_addr, reg, val);
302 }
303
304 /* miilib interface */
305 static int b44_mii_read(struct net_device *dev, int phy_id, int location)
306 {
307         u32 val;
308         struct b44 *bp = netdev_priv(dev);
309         int rc = __b44_readphy(bp, phy_id, location, &val);
310         if (rc)
311                 return 0xffffffff;
312         return val;
313 }
314
315 static void b44_mii_write(struct net_device *dev, int phy_id, int location,
316                          int val)
317 {
318         struct b44 *bp = netdev_priv(dev);
319         __b44_writephy(bp, phy_id, location, val);
320 }
321
322 static int b44_phy_reset(struct b44 *bp)
323 {
324         u32 val;
325         int err;
326
327         if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
328                 return 0;
329         err = b44_writephy(bp, MII_BMCR, BMCR_RESET);
330         if (err)
331                 return err;
332         udelay(100);
333         err = b44_readphy(bp, MII_BMCR, &val);
334         if (!err) {
335                 if (val & BMCR_RESET) {
336                         printk(KERN_ERR PFX "%s: PHY Reset would not complete.\n",
337                                bp->dev->name);
338                         err = -ENODEV;
339                 }
340         }
341
342         return 0;
343 }
344
345 static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags)
346 {
347         u32 val;
348
349         bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE);
350         bp->flags |= pause_flags;
351
352         val = br32(bp, B44_RXCONFIG);
353         if (pause_flags & B44_FLAG_RX_PAUSE)
354                 val |= RXCONFIG_FLOW;
355         else
356                 val &= ~RXCONFIG_FLOW;
357         bw32(bp, B44_RXCONFIG, val);
358
359         val = br32(bp, B44_MAC_FLOW);
360         if (pause_flags & B44_FLAG_TX_PAUSE)
361                 val |= (MAC_FLOW_PAUSE_ENAB |
362                         (0xc0 & MAC_FLOW_RX_HI_WATER));
363         else
364                 val &= ~MAC_FLOW_PAUSE_ENAB;
365         bw32(bp, B44_MAC_FLOW, val);
366 }
367
368 static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote)
369 {
370         u32 pause_enab = 0;
371
372         /* The driver supports only rx pause by default because
373            the b44 mac tx pause mechanism generates excessive
374            pause frames.
375            Use ethtool to turn on b44 tx pause if necessary.
376          */
377         if ((local & ADVERTISE_PAUSE_CAP) &&
378             (local & ADVERTISE_PAUSE_ASYM)){
379                 if ((remote & LPA_PAUSE_ASYM) &&
380                     !(remote & LPA_PAUSE_CAP))
381                         pause_enab |= B44_FLAG_RX_PAUSE;
382         }
383
384         __b44_set_flow_ctrl(bp, pause_enab);
385 }
386
387 #ifdef SSB_DRIVER_MIPS
388 extern char *nvram_get(char *name);
389 static void b44_wap54g10_workaround(struct b44 *bp)
390 {
391         const char *str;
392         u32 val;
393         int err;
394
395         /*
396          * workaround for bad hardware design in Linksys WAP54G v1.0
397          * see https://dev.openwrt.org/ticket/146
398          * check and reset bit "isolate"
399          */
400         str = nvram_get("boardnum");
401         if (!str)
402                 return;
403         if (simple_strtoul(str, NULL, 0) == 2) {
404                 err = __b44_readphy(bp, 0, MII_BMCR, &val);
405                 if (err)
406                         goto error;
407                 if (!(val & BMCR_ISOLATE))
408                         return;
409                 val &= ~BMCR_ISOLATE;
410                 err = __b44_writephy(bp, 0, MII_BMCR, val);
411                 if (err)
412                         goto error;
413         }
414         return;
415 error:
416         printk(KERN_WARNING PFX "PHY: cannot reset MII transceiver isolate bit.\n");
417 }
418 #else
419 static inline void b44_wap54g10_workaround(struct b44 *bp)
420 {
421 }
422 #endif
423
424 static int b44_setup_phy(struct b44 *bp)
425 {
426         u32 val;
427         int err;
428
429         b44_wap54g10_workaround(bp);
430
431         if (bp->phy_addr == B44_PHY_ADDR_NO_PHY)
432                 return 0;
433         if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0)
434                 goto out;
435         if ((err = b44_writephy(bp, B44_MII_ALEDCTRL,
436                                 val & MII_ALEDCTRL_ALLMSK)) != 0)
437                 goto out;
438         if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0)
439                 goto out;
440         if ((err = b44_writephy(bp, B44_MII_TLEDCTRL,
441                                 val | MII_TLEDCTRL_ENABLE)) != 0)
442                 goto out;
443
444         if (!(bp->flags & B44_FLAG_FORCE_LINK)) {
445                 u32 adv = ADVERTISE_CSMA;
446
447                 if (bp->flags & B44_FLAG_ADV_10HALF)
448                         adv |= ADVERTISE_10HALF;
449                 if (bp->flags & B44_FLAG_ADV_10FULL)
450                         adv |= ADVERTISE_10FULL;
451                 if (bp->flags & B44_FLAG_ADV_100HALF)
452                         adv |= ADVERTISE_100HALF;
453                 if (bp->flags & B44_FLAG_ADV_100FULL)
454                         adv |= ADVERTISE_100FULL;
455
456                 if (bp->flags & B44_FLAG_PAUSE_AUTO)
457                         adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
458
459                 if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0)
460                         goto out;
461                 if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE |
462                                                        BMCR_ANRESTART))) != 0)
463                         goto out;
464         } else {
465                 u32 bmcr;
466
467                 if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0)
468                         goto out;
469                 bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100);
470                 if (bp->flags & B44_FLAG_100_BASE_T)
471                         bmcr |= BMCR_SPEED100;
472                 if (bp->flags & B44_FLAG_FULL_DUPLEX)
473                         bmcr |= BMCR_FULLDPLX;
474                 if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0)
475                         goto out;
476
477                 /* Since we will not be negotiating there is no safe way
478                  * to determine if the link partner supports flow control
479                  * or not.  So just disable it completely in this case.
480                  */
481                 b44_set_flow_ctrl(bp, 0, 0);
482         }
483
484 out:
485         return err;
486 }
487
488 static void b44_stats_update(struct b44 *bp)
489 {
490         unsigned long reg;
491         u32 *val;
492
493         val = &bp->hw_stats.tx_good_octets;
494         for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) {
495                 *val++ += br32(bp, reg);
496         }
497
498         /* Pad */
499         reg += 8*4UL;
500
501         for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) {
502                 *val++ += br32(bp, reg);
503         }
504 }
505
506 static void b44_link_report(struct b44 *bp)
507 {
508         if (!netif_carrier_ok(bp->dev)) {
509                 printk(KERN_INFO PFX "%s: Link is down.\n", bp->dev->name);
510         } else {
511                 printk(KERN_INFO PFX "%s: Link is up at %d Mbps, %s duplex.\n",
512                        bp->dev->name,
513                        (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
514                        (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
515
516                 printk(KERN_INFO PFX "%s: Flow control is %s for TX and "
517                        "%s for RX.\n",
518                        bp->dev->name,
519                        (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off",
520                        (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off");
521         }
522 }
523
524 static void b44_check_phy(struct b44 *bp)
525 {
526         u32 bmsr, aux;
527
528         if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) {
529                 bp->flags |= B44_FLAG_100_BASE_T;
530                 bp->flags |= B44_FLAG_FULL_DUPLEX;
531                 if (!netif_carrier_ok(bp->dev)) {
532                         u32 val = br32(bp, B44_TX_CTRL);
533                         val |= TX_CTRL_DUPLEX;
534                         bw32(bp, B44_TX_CTRL, val);
535                         netif_carrier_on(bp->dev);
536                         b44_link_report(bp);
537                 }
538                 return;
539         }
540
541         if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
542             !b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
543             (bmsr != 0xffff)) {
544                 if (aux & MII_AUXCTRL_SPEED)
545                         bp->flags |= B44_FLAG_100_BASE_T;
546                 else
547                         bp->flags &= ~B44_FLAG_100_BASE_T;
548                 if (aux & MII_AUXCTRL_DUPLEX)
549                         bp->flags |= B44_FLAG_FULL_DUPLEX;
550                 else
551                         bp->flags &= ~B44_FLAG_FULL_DUPLEX;
552
553                 if (!netif_carrier_ok(bp->dev) &&
554                     (bmsr & BMSR_LSTATUS)) {
555                         u32 val = br32(bp, B44_TX_CTRL);
556                         u32 local_adv, remote_adv;
557
558                         if (bp->flags & B44_FLAG_FULL_DUPLEX)
559                                 val |= TX_CTRL_DUPLEX;
560                         else
561                                 val &= ~TX_CTRL_DUPLEX;
562                         bw32(bp, B44_TX_CTRL, val);
563
564                         if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
565                             !b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
566                             !b44_readphy(bp, MII_LPA, &remote_adv))
567                                 b44_set_flow_ctrl(bp, local_adv, remote_adv);
568
569                         /* Link now up */
570                         netif_carrier_on(bp->dev);
571                         b44_link_report(bp);
572                 } else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
573                         /* Link now down */
574                         netif_carrier_off(bp->dev);
575                         b44_link_report(bp);
576                 }
577
578                 if (bmsr & BMSR_RFAULT)
579                         printk(KERN_WARNING PFX "%s: Remote fault detected in PHY\n",
580                                bp->dev->name);
581                 if (bmsr & BMSR_JCD)
582                         printk(KERN_WARNING PFX "%s: Jabber detected in PHY\n",
583                                bp->dev->name);
584         }
585 }
586
587 static void b44_timer(unsigned long __opaque)
588 {
589         struct b44 *bp = (struct b44 *) __opaque;
590
591         spin_lock_irq(&bp->lock);
592
593         b44_check_phy(bp);
594
595         b44_stats_update(bp);
596
597         spin_unlock_irq(&bp->lock);
598
599         mod_timer(&bp->timer, round_jiffies(jiffies + HZ));
600 }
601
602 static void b44_tx(struct b44 *bp)
603 {
604         u32 cur, cons;
605
606         cur  = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
607         cur /= sizeof(struct dma_desc);
608
609         /* XXX needs updating when NETIF_F_SG is supported */
610         for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) {
611                 struct ring_info *rp = &bp->tx_buffers[cons];
612                 struct sk_buff *skb = rp->skb;
613
614                 BUG_ON(skb == NULL);
615
616                 ssb_dma_unmap_single(bp->sdev,
617                                      rp->mapping,
618                                      skb->len,
619                                      DMA_TO_DEVICE);
620                 rp->skb = NULL;
621                 dev_kfree_skb_irq(skb);
622         }
623
624         bp->tx_cons = cons;
625         if (netif_queue_stopped(bp->dev) &&
626             TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
627                 netif_wake_queue(bp->dev);
628
629         bw32(bp, B44_GPTIMER, 0);
630 }
631
632 /* Works like this.  This chip writes a 'struct rx_header" 30 bytes
633  * before the DMA address you give it.  So we allocate 30 more bytes
634  * for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then
635  * point the chip at 30 bytes past where the rx_header will go.
636  */
637 static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
638 {
639         struct dma_desc *dp;
640         struct ring_info *src_map, *map;
641         struct rx_header *rh;
642         struct sk_buff *skb;
643         dma_addr_t mapping;
644         int dest_idx;
645         u32 ctrl;
646
647         src_map = NULL;
648         if (src_idx >= 0)
649                 src_map = &bp->rx_buffers[src_idx];
650         dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
651         map = &bp->rx_buffers[dest_idx];
652         skb = netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ);
653         if (skb == NULL)
654                 return -ENOMEM;
655
656         mapping = ssb_dma_map_single(bp->sdev, skb->data,
657                                      RX_PKT_BUF_SZ,
658                                      DMA_FROM_DEVICE);
659
660         /* Hardware bug work-around, the chip is unable to do PCI DMA
661            to/from anything above 1GB :-( */
662         if (ssb_dma_mapping_error(bp->sdev, mapping) ||
663                 mapping + RX_PKT_BUF_SZ > DMA_30BIT_MASK) {
664                 /* Sigh... */
665                 if (!ssb_dma_mapping_error(bp->sdev, mapping))
666                         ssb_dma_unmap_single(bp->sdev, mapping,
667                                              RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
668                 dev_kfree_skb_any(skb);
669                 skb = __netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ, GFP_ATOMIC|GFP_DMA);
670                 if (skb == NULL)
671                         return -ENOMEM;
672                 mapping = ssb_dma_map_single(bp->sdev, skb->data,
673                                              RX_PKT_BUF_SZ,
674                                              DMA_FROM_DEVICE);
675                 if (ssb_dma_mapping_error(bp->sdev, mapping) ||
676                         mapping + RX_PKT_BUF_SZ > DMA_30BIT_MASK) {
677                         if (!ssb_dma_mapping_error(bp->sdev, mapping))
678                                 ssb_dma_unmap_single(bp->sdev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
679                         dev_kfree_skb_any(skb);
680                         return -ENOMEM;
681                 }
682         }
683
684         rh = (struct rx_header *) skb->data;
685         skb_reserve(skb, RX_PKT_OFFSET);
686
687         rh->len = 0;
688         rh->flags = 0;
689
690         map->skb = skb;
691         map->mapping = mapping;
692
693         if (src_map != NULL)
694                 src_map->skb = NULL;
695
696         ctrl  = (DESC_CTRL_LEN & (RX_PKT_BUF_SZ - RX_PKT_OFFSET));
697         if (dest_idx == (B44_RX_RING_SIZE - 1))
698                 ctrl |= DESC_CTRL_EOT;
699
700         dp = &bp->rx_ring[dest_idx];
701         dp->ctrl = cpu_to_le32(ctrl);
702         dp->addr = cpu_to_le32((u32) mapping + RX_PKT_OFFSET + bp->dma_offset);
703
704         if (bp->flags & B44_FLAG_RX_RING_HACK)
705                 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
706                                             dest_idx * sizeof(dp),
707                                             DMA_BIDIRECTIONAL);
708
709         return RX_PKT_BUF_SZ;
710 }
711
712 static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
713 {
714         struct dma_desc *src_desc, *dest_desc;
715         struct ring_info *src_map, *dest_map;
716         struct rx_header *rh;
717         int dest_idx;
718         __le32 ctrl;
719
720         dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
721         dest_desc = &bp->rx_ring[dest_idx];
722         dest_map = &bp->rx_buffers[dest_idx];
723         src_desc = &bp->rx_ring[src_idx];
724         src_map = &bp->rx_buffers[src_idx];
725
726         dest_map->skb = src_map->skb;
727         rh = (struct rx_header *) src_map->skb->data;
728         rh->len = 0;
729         rh->flags = 0;
730         dest_map->mapping = src_map->mapping;
731
732         if (bp->flags & B44_FLAG_RX_RING_HACK)
733                 b44_sync_dma_desc_for_cpu(bp->sdev, bp->rx_ring_dma,
734                                          src_idx * sizeof(src_desc),
735                                          DMA_BIDIRECTIONAL);
736
737         ctrl = src_desc->ctrl;
738         if (dest_idx == (B44_RX_RING_SIZE - 1))
739                 ctrl |= cpu_to_le32(DESC_CTRL_EOT);
740         else
741                 ctrl &= cpu_to_le32(~DESC_CTRL_EOT);
742
743         dest_desc->ctrl = ctrl;
744         dest_desc->addr = src_desc->addr;
745
746         src_map->skb = NULL;
747
748         if (bp->flags & B44_FLAG_RX_RING_HACK)
749                 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
750                                              dest_idx * sizeof(dest_desc),
751                                              DMA_BIDIRECTIONAL);
752
753         ssb_dma_sync_single_for_device(bp->sdev, le32_to_cpu(src_desc->addr),
754                                        RX_PKT_BUF_SZ,
755                                        DMA_FROM_DEVICE);
756 }
757
758 static int b44_rx(struct b44 *bp, int budget)
759 {
760         int received;
761         u32 cons, prod;
762
763         received = 0;
764         prod  = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK;
765         prod /= sizeof(struct dma_desc);
766         cons = bp->rx_cons;
767
768         while (cons != prod && budget > 0) {
769                 struct ring_info *rp = &bp->rx_buffers[cons];
770                 struct sk_buff *skb = rp->skb;
771                 dma_addr_t map = rp->mapping;
772                 struct rx_header *rh;
773                 u16 len;
774
775                 ssb_dma_sync_single_for_cpu(bp->sdev, map,
776                                             RX_PKT_BUF_SZ,
777                                             DMA_FROM_DEVICE);
778                 rh = (struct rx_header *) skb->data;
779                 len = le16_to_cpu(rh->len);
780                 if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) ||
781                     (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
782                 drop_it:
783                         b44_recycle_rx(bp, cons, bp->rx_prod);
784                 drop_it_no_recycle:
785                         bp->stats.rx_dropped++;
786                         goto next_pkt;
787                 }
788
789                 if (len == 0) {
790                         int i = 0;
791
792                         do {
793                                 udelay(2);
794                                 barrier();
795                                 len = le16_to_cpu(rh->len);
796                         } while (len == 0 && i++ < 5);
797                         if (len == 0)
798                                 goto drop_it;
799                 }
800
801                 /* Omit CRC. */
802                 len -= 4;
803
804                 if (len > RX_COPY_THRESHOLD) {
805                         int skb_size;
806                         skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
807                         if (skb_size < 0)
808                                 goto drop_it;
809                         ssb_dma_unmap_single(bp->sdev, map,
810                                              skb_size, DMA_FROM_DEVICE);
811                         /* Leave out rx_header */
812                         skb_put(skb, len + RX_PKT_OFFSET);
813                         skb_pull(skb, RX_PKT_OFFSET);
814                 } else {
815                         struct sk_buff *copy_skb;
816
817                         b44_recycle_rx(bp, cons, bp->rx_prod);
818                         copy_skb = dev_alloc_skb(len + 2);
819                         if (copy_skb == NULL)
820                                 goto drop_it_no_recycle;
821
822                         skb_reserve(copy_skb, 2);
823                         skb_put(copy_skb, len);
824                         /* DMA sync done above, copy just the actual packet */
825                         skb_copy_from_linear_data_offset(skb, RX_PKT_OFFSET,
826                                                          copy_skb->data, len);
827                         skb = copy_skb;
828                 }
829                 skb->ip_summed = CHECKSUM_NONE;
830                 skb->protocol = eth_type_trans(skb, bp->dev);
831                 netif_receive_skb(skb);
832                 bp->dev->last_rx = jiffies;
833                 received++;
834                 budget--;
835         next_pkt:
836                 bp->rx_prod = (bp->rx_prod + 1) &
837                         (B44_RX_RING_SIZE - 1);
838                 cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
839         }
840
841         bp->rx_cons = cons;
842         bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
843
844         return received;
845 }
846
847 static int b44_poll(struct napi_struct *napi, int budget)
848 {
849         struct b44 *bp = container_of(napi, struct b44, napi);
850         struct net_device *netdev = bp->dev;
851         int work_done;
852
853         spin_lock_irq(&bp->lock);
854
855         if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
856                 /* spin_lock(&bp->tx_lock); */
857                 b44_tx(bp);
858                 /* spin_unlock(&bp->tx_lock); */
859         }
860         spin_unlock_irq(&bp->lock);
861
862         work_done = 0;
863         if (bp->istat & ISTAT_RX)
864                 work_done += b44_rx(bp, budget);
865
866         if (bp->istat & ISTAT_ERRORS) {
867                 unsigned long flags;
868
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                 netif_rx_complete(netdev, napi);
880                 b44_enable_ints(bp);
881         }
882
883         return work_done;
884 }
885
886 static 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                         printk(KERN_INFO "%s: late interrupt.\n", dev->name);
908                         goto irq_ack;
909                 }
910
911                 if (netif_rx_schedule_prep(dev, &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                         __netif_rx_schedule(dev, &bp->napi);
918                 } else {
919                         printk(KERN_ERR PFX "%s: Error, poll already scheduled\n",
920                                dev->name);
921                 }
922
923 irq_ack:
924                 bw32(bp, B44_ISTAT, istat);
925                 br32(bp, B44_ISTAT);
926         }
927         spin_unlock(&bp->lock);
928         return IRQ_RETVAL(handled);
929 }
930
931 static void b44_tx_timeout(struct net_device *dev)
932 {
933         struct b44 *bp = netdev_priv(dev);
934
935         printk(KERN_ERR PFX "%s: transmit timed out, resetting\n",
936                dev->name);
937
938         spin_lock_irq(&bp->lock);
939
940         b44_halt(bp);
941         b44_init_rings(bp);
942         b44_init_hw(bp, B44_FULL_RESET);
943
944         spin_unlock_irq(&bp->lock);
945
946         b44_enable_ints(bp);
947
948         netif_wake_queue(dev);
949 }
950
951 static int b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
952 {
953         struct b44 *bp = netdev_priv(dev);
954         int rc = NETDEV_TX_OK;
955         dma_addr_t mapping;
956         u32 len, entry, ctrl;
957
958         len = skb->len;
959         spin_lock_irq(&bp->lock);
960
961         /* This is a hard error, log it. */
962         if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
963                 netif_stop_queue(dev);
964                 printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
965                        dev->name);
966                 goto err_out;
967         }
968
969         mapping = ssb_dma_map_single(bp->sdev, skb->data, len, DMA_TO_DEVICE);
970         if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_30BIT_MASK) {
971                 struct sk_buff *bounce_skb;
972
973                 /* Chip can't handle DMA to/from >1GB, use bounce buffer */
974                 if (!ssb_dma_mapping_error(bp->sdev, mapping))
975                         ssb_dma_unmap_single(bp->sdev, mapping, len,
976                                              DMA_TO_DEVICE);
977
978                 bounce_skb = __dev_alloc_skb(len, GFP_ATOMIC | GFP_DMA);
979                 if (!bounce_skb)
980                         goto err_out;
981
982                 mapping = ssb_dma_map_single(bp->sdev, bounce_skb->data,
983                                              len, DMA_TO_DEVICE);
984                 if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_30BIT_MASK) {
985                         if (!ssb_dma_mapping_error(bp->sdev, mapping))
986                                 ssb_dma_unmap_single(bp->sdev, mapping,
987                                                      len, DMA_TO_DEVICE);
988                         dev_kfree_skb_any(bounce_skb);
989                         goto err_out;
990                 }
991
992                 skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
993                 dev_kfree_skb_any(skb);
994                 skb = bounce_skb;
995         }
996
997         entry = bp->tx_prod;
998         bp->tx_buffers[entry].skb = skb;
999         bp->tx_buffers[entry].mapping = mapping;
1000
1001         ctrl  = (len & DESC_CTRL_LEN);
1002         ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
1003         if (entry == (B44_TX_RING_SIZE - 1))
1004                 ctrl |= DESC_CTRL_EOT;
1005
1006         bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1007         bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1008
1009         if (bp->flags & B44_FLAG_TX_RING_HACK)
1010                 b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
1011                                             entry * sizeof(bp->tx_ring[0]),
1012                                             DMA_TO_DEVICE);
1013
1014         entry = NEXT_TX(entry);
1015
1016         bp->tx_prod = entry;
1017
1018         wmb();
1019
1020         bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1021         if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1022                 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1023         if (bp->flags & B44_FLAG_REORDER_BUG)
1024                 br32(bp, B44_DMATX_PTR);
1025
1026         if (TX_BUFFS_AVAIL(bp) < 1)
1027                 netif_stop_queue(dev);
1028
1029         dev->trans_start = jiffies;
1030
1031 out_unlock:
1032         spin_unlock_irq(&bp->lock);
1033
1034         return rc;
1035
1036 err_out:
1037         rc = NETDEV_TX_BUSY;
1038         goto out_unlock;
1039 }
1040
1041 static int b44_change_mtu(struct net_device *dev, int new_mtu)
1042 {
1043         struct b44 *bp = netdev_priv(dev);
1044
1045         if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
1046                 return -EINVAL;
1047
1048         if (!netif_running(dev)) {
1049                 /* We'll just catch it later when the
1050                  * device is up'd.
1051                  */
1052                 dev->mtu = new_mtu;
1053                 return 0;
1054         }
1055
1056         spin_lock_irq(&bp->lock);
1057         b44_halt(bp);
1058         dev->mtu = new_mtu;
1059         b44_init_rings(bp);
1060         b44_init_hw(bp, B44_FULL_RESET);
1061         spin_unlock_irq(&bp->lock);
1062
1063         b44_enable_ints(bp);
1064
1065         return 0;
1066 }
1067
1068 /* Free up pending packets in all rx/tx rings.
1069  *
1070  * The chip has been shut down and the driver detached from
1071  * the networking, so no interrupts or new tx packets will
1072  * end up in the driver.  bp->lock is not held and we are not
1073  * in an interrupt context and thus may sleep.
1074  */
1075 static void b44_free_rings(struct b44 *bp)
1076 {
1077         struct ring_info *rp;
1078         int i;
1079
1080         for (i = 0; i < B44_RX_RING_SIZE; i++) {
1081                 rp = &bp->rx_buffers[i];
1082
1083                 if (rp->skb == NULL)
1084                         continue;
1085                 ssb_dma_unmap_single(bp->sdev, rp->mapping, RX_PKT_BUF_SZ,
1086                                      DMA_FROM_DEVICE);
1087                 dev_kfree_skb_any(rp->skb);
1088                 rp->skb = NULL;
1089         }
1090
1091         /* XXX needs changes once NETIF_F_SG is set... */
1092         for (i = 0; i < B44_TX_RING_SIZE; i++) {
1093                 rp = &bp->tx_buffers[i];
1094
1095                 if (rp->skb == NULL)
1096                         continue;
1097                 ssb_dma_unmap_single(bp->sdev, rp->mapping, rp->skb->len,
1098                                      DMA_TO_DEVICE);
1099                 dev_kfree_skb_any(rp->skb);
1100                 rp->skb = NULL;
1101         }
1102 }
1103
1104 /* Initialize tx/rx rings for packet processing.
1105  *
1106  * The chip has been shut down and the driver detached from
1107  * the networking, so no interrupts or new tx packets will
1108  * end up in the driver.
1109  */
1110 static void b44_init_rings(struct b44 *bp)
1111 {
1112         int i;
1113
1114         b44_free_rings(bp);
1115
1116         memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1117         memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1118
1119         if (bp->flags & B44_FLAG_RX_RING_HACK)
1120                 ssb_dma_sync_single_for_device(bp->sdev, bp->rx_ring_dma,
1121                                                DMA_TABLE_BYTES,
1122                                                DMA_BIDIRECTIONAL);
1123
1124         if (bp->flags & B44_FLAG_TX_RING_HACK)
1125                 ssb_dma_sync_single_for_device(bp->sdev, bp->tx_ring_dma,
1126                                                DMA_TABLE_BYTES,
1127                                                DMA_TO_DEVICE);
1128
1129         for (i = 0; i < bp->rx_pending; i++) {
1130                 if (b44_alloc_rx_skb(bp, -1, i) < 0)
1131                         break;
1132         }
1133 }
1134
1135 /*
1136  * Must not be invoked with interrupt sources disabled and
1137  * the hardware shutdown down.
1138  */
1139 static void b44_free_consistent(struct b44 *bp)
1140 {
1141         kfree(bp->rx_buffers);
1142         bp->rx_buffers = NULL;
1143         kfree(bp->tx_buffers);
1144         bp->tx_buffers = NULL;
1145         if (bp->rx_ring) {
1146                 if (bp->flags & B44_FLAG_RX_RING_HACK) {
1147                         ssb_dma_unmap_single(bp->sdev, bp->rx_ring_dma,
1148                                              DMA_TABLE_BYTES,
1149                                              DMA_BIDIRECTIONAL);
1150                         kfree(bp->rx_ring);
1151                 } else
1152                         ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
1153                                                 bp->rx_ring, bp->rx_ring_dma,
1154                                                 GFP_KERNEL);
1155                 bp->rx_ring = NULL;
1156                 bp->flags &= ~B44_FLAG_RX_RING_HACK;
1157         }
1158         if (bp->tx_ring) {
1159                 if (bp->flags & B44_FLAG_TX_RING_HACK) {
1160                         ssb_dma_unmap_single(bp->sdev, bp->tx_ring_dma,
1161                                              DMA_TABLE_BYTES,
1162                                              DMA_TO_DEVICE);
1163                         kfree(bp->tx_ring);
1164                 } else
1165                         ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
1166                                                 bp->tx_ring, bp->tx_ring_dma,
1167                                                 GFP_KERNEL);
1168                 bp->tx_ring = NULL;
1169                 bp->flags &= ~B44_FLAG_TX_RING_HACK;
1170         }
1171 }
1172
1173 /*
1174  * Must not be invoked with interrupt sources disabled and
1175  * the hardware shutdown down.  Can sleep.
1176  */
1177 static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
1178 {
1179         int size;
1180
1181         size  = B44_RX_RING_SIZE * sizeof(struct ring_info);
1182         bp->rx_buffers = kzalloc(size, gfp);
1183         if (!bp->rx_buffers)
1184                 goto out_err;
1185
1186         size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1187         bp->tx_buffers = kzalloc(size, gfp);
1188         if (!bp->tx_buffers)
1189                 goto out_err;
1190
1191         size = DMA_TABLE_BYTES;
1192         bp->rx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->rx_ring_dma, gfp);
1193         if (!bp->rx_ring) {
1194                 /* Allocation may have failed due to pci_alloc_consistent
1195                    insisting on use of GFP_DMA, which is more restrictive
1196                    than necessary...  */
1197                 struct dma_desc *rx_ring;
1198                 dma_addr_t rx_ring_dma;
1199
1200                 rx_ring = kzalloc(size, gfp);
1201                 if (!rx_ring)
1202                         goto out_err;
1203
1204                 rx_ring_dma = ssb_dma_map_single(bp->sdev, rx_ring,
1205                                                  DMA_TABLE_BYTES,
1206                                                  DMA_BIDIRECTIONAL);
1207
1208                 if (ssb_dma_mapping_error(bp->sdev, rx_ring_dma) ||
1209                         rx_ring_dma + size > DMA_30BIT_MASK) {
1210                         kfree(rx_ring);
1211                         goto out_err;
1212                 }
1213
1214                 bp->rx_ring = rx_ring;
1215                 bp->rx_ring_dma = rx_ring_dma;
1216                 bp->flags |= B44_FLAG_RX_RING_HACK;
1217         }
1218
1219         bp->tx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->tx_ring_dma, gfp);
1220         if (!bp->tx_ring) {
1221                 /* Allocation may have failed due to ssb_dma_alloc_consistent
1222                    insisting on use of GFP_DMA, which is more restrictive
1223                    than necessary...  */
1224                 struct dma_desc *tx_ring;
1225                 dma_addr_t tx_ring_dma;
1226
1227                 tx_ring = kzalloc(size, gfp);
1228                 if (!tx_ring)
1229                         goto out_err;
1230
1231                 tx_ring_dma = ssb_dma_map_single(bp->sdev, tx_ring,
1232                                             DMA_TABLE_BYTES,
1233                                             DMA_TO_DEVICE);
1234
1235                 if (ssb_dma_mapping_error(bp->sdev, tx_ring_dma) ||
1236                         tx_ring_dma + size > DMA_30BIT_MASK) {
1237                         kfree(tx_ring);
1238                         goto out_err;
1239                 }
1240
1241                 bp->tx_ring = tx_ring;
1242                 bp->tx_ring_dma = tx_ring_dma;
1243                 bp->flags |= B44_FLAG_TX_RING_HACK;
1244         }
1245
1246         return 0;
1247
1248 out_err:
1249         b44_free_consistent(bp);
1250         return -ENOMEM;
1251 }
1252
1253 /* bp->lock is held. */
1254 static void b44_clear_stats(struct b44 *bp)
1255 {
1256         unsigned long reg;
1257
1258         bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1259         for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1260                 br32(bp, reg);
1261         for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1262                 br32(bp, reg);
1263 }
1264
1265 /* bp->lock is held. */
1266 static void b44_chip_reset(struct b44 *bp, int reset_kind)
1267 {
1268         struct ssb_device *sdev = bp->sdev;
1269
1270         if (ssb_device_is_enabled(bp->sdev)) {
1271                 bw32(bp, B44_RCV_LAZY, 0);
1272                 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1273                 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1);
1274                 bw32(bp, B44_DMATX_CTRL, 0);
1275                 bp->tx_prod = bp->tx_cons = 0;
1276                 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1277                         b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1278                                      100, 0);
1279                 }
1280                 bw32(bp, B44_DMARX_CTRL, 0);
1281                 bp->rx_prod = bp->rx_cons = 0;
1282         } else
1283                 ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
1284
1285         ssb_device_enable(bp->sdev, 0);
1286         b44_clear_stats(bp);
1287
1288         /*
1289          * Don't enable PHY if we are doing a partial reset
1290          * we are probably going to power down
1291          */
1292         if (reset_kind == B44_CHIP_RESET_PARTIAL)
1293                 return;
1294
1295         switch (sdev->bus->bustype) {
1296         case SSB_BUSTYPE_SSB:
1297                 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1298                      (((ssb_clockspeed(sdev->bus) + (B44_MDC_RATIO / 2)) / B44_MDC_RATIO)
1299                      & MDIO_CTRL_MAXF_MASK)));
1300                 break;
1301         case SSB_BUSTYPE_PCI:
1302         case SSB_BUSTYPE_PCMCIA:
1303                 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1304                      (0x0d & MDIO_CTRL_MAXF_MASK)));
1305                 break;
1306         }
1307
1308         br32(bp, B44_MDIO_CTRL);
1309
1310         if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1311                 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1312                 br32(bp, B44_ENET_CTRL);
1313                 bp->flags &= ~B44_FLAG_INTERNAL_PHY;
1314         } else {
1315                 u32 val = br32(bp, B44_DEVCTRL);
1316
1317                 if (val & DEVCTRL_EPR) {
1318                         bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1319                         br32(bp, B44_DEVCTRL);
1320                         udelay(100);
1321                 }
1322                 bp->flags |= B44_FLAG_INTERNAL_PHY;
1323         }
1324 }
1325
1326 /* bp->lock is held. */
1327 static void b44_halt(struct b44 *bp)
1328 {
1329         b44_disable_ints(bp);
1330         /* reset PHY */
1331         b44_phy_reset(bp);
1332         /* power down PHY */
1333         printk(KERN_INFO PFX "%s: powering down PHY\n", bp->dev->name);
1334         bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
1335         /* now reset the chip, but without enabling the MAC&PHY
1336          * part of it. This has to be done _after_ we shut down the PHY */
1337         b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1338 }
1339
1340 /* bp->lock is held. */
1341 static 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
1353 static 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         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
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  */
1381 static void __b44_set_rx_mode(struct net_device *);
1382 static 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
1424 static int b44_open(struct net_device *dev)
1425 {
1426         struct b44 *bp = netdev_priv(dev);
1427         int err;
1428
1429         err = b44_alloc_consistent(bp, GFP_KERNEL);
1430         if (err)
1431                 goto out;
1432
1433         napi_enable(&bp->napi);
1434
1435         b44_init_rings(bp);
1436         b44_init_hw(bp, B44_FULL_RESET);
1437
1438         b44_check_phy(bp);
1439
1440         err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
1441         if (unlikely(err < 0)) {
1442                 napi_disable(&bp->napi);
1443                 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1444                 b44_free_rings(bp);
1445                 b44_free_consistent(bp);
1446                 goto out;
1447         }
1448
1449         init_timer(&bp->timer);
1450         bp->timer.expires = jiffies + HZ;
1451         bp->timer.data = (unsigned long) bp;
1452         bp->timer.function = b44_timer;
1453         add_timer(&bp->timer);
1454
1455         b44_enable_ints(bp);
1456         netif_start_queue(dev);
1457 out:
1458         return err;
1459 }
1460
1461 #ifdef CONFIG_NET_POLL_CONTROLLER
1462 /*
1463  * Polling receive - used by netconsole and other diagnostic tools
1464  * to allow network i/o with interrupts disabled.
1465  */
1466 static void b44_poll_controller(struct net_device *dev)
1467 {
1468         disable_irq(dev->irq);
1469         b44_interrupt(dev->irq, dev);
1470         enable_irq(dev->irq);
1471 }
1472 #endif
1473
1474 static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
1475 {
1476         u32 i;
1477         u32 *pattern = (u32 *) pp;
1478
1479         for (i = 0; i < bytes; i += sizeof(u32)) {
1480                 bw32(bp, B44_FILT_ADDR, table_offset + i);
1481                 bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
1482         }
1483 }
1484
1485 static int b44_magic_pattern(u8 *macaddr, u8 *ppattern, u8 *pmask, int offset)
1486 {
1487         int magicsync = 6;
1488         int k, j, len = offset;
1489         int ethaddr_bytes = ETH_ALEN;
1490
1491         memset(ppattern + offset, 0xff, magicsync);
1492         for (j = 0; j < magicsync; j++)
1493                 set_bit(len++, (unsigned long *) pmask);
1494
1495         for (j = 0; j < B44_MAX_PATTERNS; j++) {
1496                 if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
1497                         ethaddr_bytes = ETH_ALEN;
1498                 else
1499                         ethaddr_bytes = B44_PATTERN_SIZE - len;
1500                 if (ethaddr_bytes <=0)
1501                         break;
1502                 for (k = 0; k< ethaddr_bytes; k++) {
1503                         ppattern[offset + magicsync +
1504                                 (j * ETH_ALEN) + k] = macaddr[k];
1505                         len++;
1506                         set_bit(len, (unsigned long *) pmask);
1507                 }
1508         }
1509         return len - 1;
1510 }
1511
1512 /* Setup magic packet patterns in the b44 WOL
1513  * pattern matching filter.
1514  */
1515 static void b44_setup_pseudo_magicp(struct b44 *bp)
1516 {
1517
1518         u32 val;
1519         int plen0, plen1, plen2;
1520         u8 *pwol_pattern;
1521         u8 pwol_mask[B44_PMASK_SIZE];
1522
1523         pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
1524         if (!pwol_pattern) {
1525                 printk(KERN_ERR PFX "Memory not available for WOL\n");
1526                 return;
1527         }
1528
1529         /* Ipv4 magic packet pattern - pattern 0.*/
1530         memset(pwol_mask, 0, B44_PMASK_SIZE);
1531         plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1532                                   B44_ETHIPV4UDP_HLEN);
1533
1534         bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
1535         bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
1536
1537         /* Raw ethernet II magic packet pattern - pattern 1 */
1538         memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1539         memset(pwol_mask, 0, B44_PMASK_SIZE);
1540         plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1541                                   ETH_HLEN);
1542
1543         bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1544                        B44_PATTERN_BASE + B44_PATTERN_SIZE);
1545         bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1546                        B44_PMASK_BASE + B44_PMASK_SIZE);
1547
1548         /* Ipv6 magic packet pattern - pattern 2 */
1549         memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1550         memset(pwol_mask, 0, B44_PMASK_SIZE);
1551         plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1552                                   B44_ETHIPV6UDP_HLEN);
1553
1554         bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1555                        B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
1556         bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1557                        B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
1558
1559         kfree(pwol_pattern);
1560
1561         /* set these pattern's lengths: one less than each real length */
1562         val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
1563         bw32(bp, B44_WKUP_LEN, val);
1564
1565         /* enable wakeup pattern matching */
1566         val = br32(bp, B44_DEVCTRL);
1567         bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
1568
1569 }
1570
1571 #ifdef CONFIG_B44_PCI
1572 static void b44_setup_wol_pci(struct b44 *bp)
1573 {
1574         u16 val;
1575
1576         if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
1577                 bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
1578                 pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
1579                 pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
1580         }
1581 }
1582 #else
1583 static inline void b44_setup_wol_pci(struct b44 *bp) { }
1584 #endif /* CONFIG_B44_PCI */
1585
1586 static void b44_setup_wol(struct b44 *bp)
1587 {
1588         u32 val;
1589
1590         bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
1591
1592         if (bp->flags & B44_FLAG_B0_ANDLATER) {
1593
1594                 bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
1595
1596                 val = bp->dev->dev_addr[2] << 24 |
1597                         bp->dev->dev_addr[3] << 16 |
1598                         bp->dev->dev_addr[4] << 8 |
1599                         bp->dev->dev_addr[5];
1600                 bw32(bp, B44_ADDR_LO, val);
1601
1602                 val = bp->dev->dev_addr[0] << 8 |
1603                         bp->dev->dev_addr[1];
1604                 bw32(bp, B44_ADDR_HI, val);
1605
1606                 val = br32(bp, B44_DEVCTRL);
1607                 bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
1608
1609         } else {
1610                 b44_setup_pseudo_magicp(bp);
1611         }
1612         b44_setup_wol_pci(bp);
1613 }
1614
1615 static int b44_close(struct net_device *dev)
1616 {
1617         struct b44 *bp = netdev_priv(dev);
1618
1619         netif_stop_queue(dev);
1620
1621         napi_disable(&bp->napi);
1622
1623         del_timer_sync(&bp->timer);
1624
1625         spin_lock_irq(&bp->lock);
1626
1627         b44_halt(bp);
1628         b44_free_rings(bp);
1629         netif_carrier_off(dev);
1630
1631         spin_unlock_irq(&bp->lock);
1632
1633         free_irq(dev->irq, dev);
1634
1635         if (bp->flags & B44_FLAG_WOL_ENABLE) {
1636                 b44_init_hw(bp, B44_PARTIAL_RESET);
1637                 b44_setup_wol(bp);
1638         }
1639
1640         b44_free_consistent(bp);
1641
1642         return 0;
1643 }
1644
1645 static struct net_device_stats *b44_get_stats(struct net_device *dev)
1646 {
1647         struct b44 *bp = netdev_priv(dev);
1648         struct net_device_stats *nstat = &bp->stats;
1649         struct b44_hw_stats *hwstat = &bp->hw_stats;
1650
1651         /* Convert HW stats into netdevice stats. */
1652         nstat->rx_packets = hwstat->rx_pkts;
1653         nstat->tx_packets = hwstat->tx_pkts;
1654         nstat->rx_bytes   = hwstat->rx_octets;
1655         nstat->tx_bytes   = hwstat->tx_octets;
1656         nstat->tx_errors  = (hwstat->tx_jabber_pkts +
1657                              hwstat->tx_oversize_pkts +
1658                              hwstat->tx_underruns +
1659                              hwstat->tx_excessive_cols +
1660                              hwstat->tx_late_cols);
1661         nstat->multicast  = hwstat->tx_multicast_pkts;
1662         nstat->collisions = hwstat->tx_total_cols;
1663
1664         nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1665                                    hwstat->rx_undersize);
1666         nstat->rx_over_errors   = hwstat->rx_missed_pkts;
1667         nstat->rx_frame_errors  = hwstat->rx_align_errs;
1668         nstat->rx_crc_errors    = hwstat->rx_crc_errs;
1669         nstat->rx_errors        = (hwstat->rx_jabber_pkts +
1670                                    hwstat->rx_oversize_pkts +
1671                                    hwstat->rx_missed_pkts +
1672                                    hwstat->rx_crc_align_errs +
1673                                    hwstat->rx_undersize +
1674                                    hwstat->rx_crc_errs +
1675                                    hwstat->rx_align_errs +
1676                                    hwstat->rx_symbol_errs);
1677
1678         nstat->tx_aborted_errors = hwstat->tx_underruns;
1679 #if 0
1680         /* Carrier lost counter seems to be broken for some devices */
1681         nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1682 #endif
1683
1684         return nstat;
1685 }
1686
1687 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1688 {
1689         struct dev_mc_list *mclist;
1690         int i, num_ents;
1691
1692         num_ents = min_t(int, dev->mc_count, B44_MCAST_TABLE_SIZE);
1693         mclist = dev->mc_list;
1694         for (i = 0; mclist && i < num_ents; i++, mclist = mclist->next) {
1695                 __b44_cam_write(bp, mclist->dmi_addr, i + 1);
1696         }
1697         return i+1;
1698 }
1699
1700 static void __b44_set_rx_mode(struct net_device *dev)
1701 {
1702         struct b44 *bp = netdev_priv(dev);
1703         u32 val;
1704
1705         val = br32(bp, B44_RXCONFIG);
1706         val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1707         if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
1708                 val |= RXCONFIG_PROMISC;
1709                 bw32(bp, B44_RXCONFIG, val);
1710         } else {
1711                 unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
1712                 int i = 1;
1713
1714                 __b44_set_mac_addr(bp);
1715
1716                 if ((dev->flags & IFF_ALLMULTI) ||
1717                     (dev->mc_count > B44_MCAST_TABLE_SIZE))
1718                         val |= RXCONFIG_ALLMULTI;
1719                 else
1720                         i = __b44_load_mcast(bp, dev);
1721
1722                 for (; i < 64; i++)
1723                         __b44_cam_write(bp, zero, i);
1724
1725                 bw32(bp, B44_RXCONFIG, val);
1726                 val = br32(bp, B44_CAM_CTRL);
1727                 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1728         }
1729 }
1730
1731 static void b44_set_rx_mode(struct net_device *dev)
1732 {
1733         struct b44 *bp = netdev_priv(dev);
1734
1735         spin_lock_irq(&bp->lock);
1736         __b44_set_rx_mode(dev);
1737         spin_unlock_irq(&bp->lock);
1738 }
1739
1740 static u32 b44_get_msglevel(struct net_device *dev)
1741 {
1742         struct b44 *bp = netdev_priv(dev);
1743         return bp->msg_enable;
1744 }
1745
1746 static void b44_set_msglevel(struct net_device *dev, u32 value)
1747 {
1748         struct b44 *bp = netdev_priv(dev);
1749         bp->msg_enable = value;
1750 }
1751
1752 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1753 {
1754         struct b44 *bp = netdev_priv(dev);
1755         struct ssb_bus *bus = bp->sdev->bus;
1756
1757         strncpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
1758         strncpy(info->version, DRV_MODULE_VERSION, sizeof(info->driver));
1759         switch (bus->bustype) {
1760         case SSB_BUSTYPE_PCI:
1761                 strncpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
1762                 break;
1763         case SSB_BUSTYPE_PCMCIA:
1764         case SSB_BUSTYPE_SSB:
1765                 strncpy(info->bus_info, "SSB", sizeof(info->bus_info));
1766                 break;
1767         }
1768 }
1769
1770 static int b44_nway_reset(struct net_device *dev)
1771 {
1772         struct b44 *bp = netdev_priv(dev);
1773         u32 bmcr;
1774         int r;
1775
1776         spin_lock_irq(&bp->lock);
1777         b44_readphy(bp, MII_BMCR, &bmcr);
1778         b44_readphy(bp, MII_BMCR, &bmcr);
1779         r = -EINVAL;
1780         if (bmcr & BMCR_ANENABLE) {
1781                 b44_writephy(bp, MII_BMCR,
1782                              bmcr | BMCR_ANRESTART);
1783                 r = 0;
1784         }
1785         spin_unlock_irq(&bp->lock);
1786
1787         return r;
1788 }
1789
1790 static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1791 {
1792         struct b44 *bp = netdev_priv(dev);
1793
1794         cmd->supported = (SUPPORTED_Autoneg);
1795         cmd->supported |= (SUPPORTED_100baseT_Half |
1796                           SUPPORTED_100baseT_Full |
1797                           SUPPORTED_10baseT_Half |
1798                           SUPPORTED_10baseT_Full |
1799                           SUPPORTED_MII);
1800
1801         cmd->advertising = 0;
1802         if (bp->flags & B44_FLAG_ADV_10HALF)
1803                 cmd->advertising |= ADVERTISED_10baseT_Half;
1804         if (bp->flags & B44_FLAG_ADV_10FULL)
1805                 cmd->advertising |= ADVERTISED_10baseT_Full;
1806         if (bp->flags & B44_FLAG_ADV_100HALF)
1807                 cmd->advertising |= ADVERTISED_100baseT_Half;
1808         if (bp->flags & B44_FLAG_ADV_100FULL)
1809                 cmd->advertising |= ADVERTISED_100baseT_Full;
1810         cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1811         cmd->speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1812                 SPEED_100 : SPEED_10;
1813         cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1814                 DUPLEX_FULL : DUPLEX_HALF;
1815         cmd->port = 0;
1816         cmd->phy_address = bp->phy_addr;
1817         cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
1818                 XCVR_INTERNAL : XCVR_EXTERNAL;
1819         cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1820                 AUTONEG_DISABLE : AUTONEG_ENABLE;
1821         if (cmd->autoneg == AUTONEG_ENABLE)
1822                 cmd->advertising |= ADVERTISED_Autoneg;
1823         if (!netif_running(dev)){
1824                 cmd->speed = 0;
1825                 cmd->duplex = 0xff;
1826         }
1827         cmd->maxtxpkt = 0;
1828         cmd->maxrxpkt = 0;
1829         return 0;
1830 }
1831
1832 static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1833 {
1834         struct b44 *bp = netdev_priv(dev);
1835
1836         /* We do not support gigabit. */
1837         if (cmd->autoneg == AUTONEG_ENABLE) {
1838                 if (cmd->advertising &
1839                     (ADVERTISED_1000baseT_Half |
1840                      ADVERTISED_1000baseT_Full))
1841                         return -EINVAL;
1842         } else if ((cmd->speed != SPEED_100 &&
1843                     cmd->speed != SPEED_10) ||
1844                    (cmd->duplex != DUPLEX_HALF &&
1845                     cmd->duplex != DUPLEX_FULL)) {
1846                         return -EINVAL;
1847         }
1848
1849         spin_lock_irq(&bp->lock);
1850
1851         if (cmd->autoneg == AUTONEG_ENABLE) {
1852                 bp->flags &= ~(B44_FLAG_FORCE_LINK |
1853                                B44_FLAG_100_BASE_T |
1854                                B44_FLAG_FULL_DUPLEX |
1855                                B44_FLAG_ADV_10HALF |
1856                                B44_FLAG_ADV_10FULL |
1857                                B44_FLAG_ADV_100HALF |
1858                                B44_FLAG_ADV_100FULL);
1859                 if (cmd->advertising == 0) {
1860                         bp->flags |= (B44_FLAG_ADV_10HALF |
1861                                       B44_FLAG_ADV_10FULL |
1862                                       B44_FLAG_ADV_100HALF |
1863                                       B44_FLAG_ADV_100FULL);
1864                 } else {
1865                         if (cmd->advertising & ADVERTISED_10baseT_Half)
1866                                 bp->flags |= B44_FLAG_ADV_10HALF;
1867                         if (cmd->advertising & ADVERTISED_10baseT_Full)
1868                                 bp->flags |= B44_FLAG_ADV_10FULL;
1869                         if (cmd->advertising & ADVERTISED_100baseT_Half)
1870                                 bp->flags |= B44_FLAG_ADV_100HALF;
1871                         if (cmd->advertising & ADVERTISED_100baseT_Full)
1872                                 bp->flags |= B44_FLAG_ADV_100FULL;
1873                 }
1874         } else {
1875                 bp->flags |= B44_FLAG_FORCE_LINK;
1876                 bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
1877                 if (cmd->speed == SPEED_100)
1878                         bp->flags |= B44_FLAG_100_BASE_T;
1879                 if (cmd->duplex == DUPLEX_FULL)
1880                         bp->flags |= B44_FLAG_FULL_DUPLEX;
1881         }
1882
1883         if (netif_running(dev))
1884                 b44_setup_phy(bp);
1885
1886         spin_unlock_irq(&bp->lock);
1887
1888         return 0;
1889 }
1890
1891 static void b44_get_ringparam(struct net_device *dev,
1892                               struct ethtool_ringparam *ering)
1893 {
1894         struct b44 *bp = netdev_priv(dev);
1895
1896         ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1897         ering->rx_pending = bp->rx_pending;
1898
1899         /* XXX ethtool lacks a tx_max_pending, oops... */
1900 }
1901
1902 static int b44_set_ringparam(struct net_device *dev,
1903                              struct ethtool_ringparam *ering)
1904 {
1905         struct b44 *bp = netdev_priv(dev);
1906
1907         if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1908             (ering->rx_mini_pending != 0) ||
1909             (ering->rx_jumbo_pending != 0) ||
1910             (ering->tx_pending > B44_TX_RING_SIZE - 1))
1911                 return -EINVAL;
1912
1913         spin_lock_irq(&bp->lock);
1914
1915         bp->rx_pending = ering->rx_pending;
1916         bp->tx_pending = ering->tx_pending;
1917
1918         b44_halt(bp);
1919         b44_init_rings(bp);
1920         b44_init_hw(bp, B44_FULL_RESET);
1921         netif_wake_queue(bp->dev);
1922         spin_unlock_irq(&bp->lock);
1923
1924         b44_enable_ints(bp);
1925
1926         return 0;
1927 }
1928
1929 static void b44_get_pauseparam(struct net_device *dev,
1930                                 struct ethtool_pauseparam *epause)
1931 {
1932         struct b44 *bp = netdev_priv(dev);
1933
1934         epause->autoneg =
1935                 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1936         epause->rx_pause =
1937                 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
1938         epause->tx_pause =
1939                 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
1940 }
1941
1942 static int b44_set_pauseparam(struct net_device *dev,
1943                                 struct ethtool_pauseparam *epause)
1944 {
1945         struct b44 *bp = netdev_priv(dev);
1946
1947         spin_lock_irq(&bp->lock);
1948         if (epause->autoneg)
1949                 bp->flags |= B44_FLAG_PAUSE_AUTO;
1950         else
1951                 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
1952         if (epause->rx_pause)
1953                 bp->flags |= B44_FLAG_RX_PAUSE;
1954         else
1955                 bp->flags &= ~B44_FLAG_RX_PAUSE;
1956         if (epause->tx_pause)
1957                 bp->flags |= B44_FLAG_TX_PAUSE;
1958         else
1959                 bp->flags &= ~B44_FLAG_TX_PAUSE;
1960         if (bp->flags & B44_FLAG_PAUSE_AUTO) {
1961                 b44_halt(bp);
1962                 b44_init_rings(bp);
1963                 b44_init_hw(bp, B44_FULL_RESET);
1964         } else {
1965                 __b44_set_flow_ctrl(bp, bp->flags);
1966         }
1967         spin_unlock_irq(&bp->lock);
1968
1969         b44_enable_ints(bp);
1970
1971         return 0;
1972 }
1973
1974 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1975 {
1976         switch(stringset) {
1977         case ETH_SS_STATS:
1978                 memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
1979                 break;
1980         }
1981 }
1982
1983 static int b44_get_sset_count(struct net_device *dev, int sset)
1984 {
1985         switch (sset) {
1986         case ETH_SS_STATS:
1987                 return ARRAY_SIZE(b44_gstrings);
1988         default:
1989                 return -EOPNOTSUPP;
1990         }
1991 }
1992
1993 static void b44_get_ethtool_stats(struct net_device *dev,
1994                                   struct ethtool_stats *stats, u64 *data)
1995 {
1996         struct b44 *bp = netdev_priv(dev);
1997         u32 *val = &bp->hw_stats.tx_good_octets;
1998         u32 i;
1999
2000         spin_lock_irq(&bp->lock);
2001
2002         b44_stats_update(bp);
2003
2004         for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
2005                 *data++ = *val++;
2006
2007         spin_unlock_irq(&bp->lock);
2008 }
2009
2010 static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2011 {
2012         struct b44 *bp = netdev_priv(dev);
2013
2014         wol->supported = WAKE_MAGIC;
2015         if (bp->flags & B44_FLAG_WOL_ENABLE)
2016                 wol->wolopts = WAKE_MAGIC;
2017         else
2018                 wol->wolopts = 0;
2019         memset(&wol->sopass, 0, sizeof(wol->sopass));
2020 }
2021
2022 static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2023 {
2024         struct b44 *bp = netdev_priv(dev);
2025
2026         spin_lock_irq(&bp->lock);
2027         if (wol->wolopts & WAKE_MAGIC)
2028                 bp->flags |= B44_FLAG_WOL_ENABLE;
2029         else
2030                 bp->flags &= ~B44_FLAG_WOL_ENABLE;
2031         spin_unlock_irq(&bp->lock);
2032
2033         return 0;
2034 }
2035
2036 static const struct ethtool_ops b44_ethtool_ops = {
2037         .get_drvinfo            = b44_get_drvinfo,
2038         .get_settings           = b44_get_settings,
2039         .set_settings           = b44_set_settings,
2040         .nway_reset             = b44_nway_reset,
2041         .get_link               = ethtool_op_get_link,
2042         .get_wol                = b44_get_wol,
2043         .set_wol                = b44_set_wol,
2044         .get_ringparam          = b44_get_ringparam,
2045         .set_ringparam          = b44_set_ringparam,
2046         .get_pauseparam         = b44_get_pauseparam,
2047         .set_pauseparam         = b44_set_pauseparam,
2048         .get_msglevel           = b44_get_msglevel,
2049         .set_msglevel           = b44_set_msglevel,
2050         .get_strings            = b44_get_strings,
2051         .get_sset_count         = b44_get_sset_count,
2052         .get_ethtool_stats      = b44_get_ethtool_stats,
2053 };
2054
2055 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2056 {
2057         struct mii_ioctl_data *data = if_mii(ifr);
2058         struct b44 *bp = netdev_priv(dev);
2059         int err = -EINVAL;
2060
2061         if (!netif_running(dev))
2062                 goto out;
2063
2064         spin_lock_irq(&bp->lock);
2065         err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
2066         spin_unlock_irq(&bp->lock);
2067 out:
2068         return err;
2069 }
2070
2071 static int __devinit b44_get_invariants(struct b44 *bp)
2072 {
2073         struct ssb_device *sdev = bp->sdev;
2074         int err = 0;
2075         u8 *addr;
2076
2077         bp->dma_offset = ssb_dma_translation(sdev);
2078
2079         if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
2080             instance > 1) {
2081                 addr = sdev->bus->sprom.et1mac;
2082                 bp->phy_addr = sdev->bus->sprom.et1phyaddr;
2083         } else {
2084                 addr = sdev->bus->sprom.et0mac;
2085                 bp->phy_addr = sdev->bus->sprom.et0phyaddr;
2086         }
2087         /* Some ROMs have buggy PHY addresses with the high
2088          * bits set (sign extension?). Truncate them to a
2089          * valid PHY address. */
2090         bp->phy_addr &= 0x1F;
2091
2092         memcpy(bp->dev->dev_addr, addr, 6);
2093
2094         if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
2095                 printk(KERN_ERR PFX "Invalid MAC address found in EEPROM\n");
2096                 return -EINVAL;
2097         }
2098
2099         memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
2100
2101         bp->imask = IMASK_DEF;
2102
2103         /* XXX - really required?
2104            bp->flags |= B44_FLAG_BUGGY_TXPTR;
2105         */
2106
2107         if (bp->sdev->id.revision >= 7)
2108                 bp->flags |= B44_FLAG_B0_ANDLATER;
2109
2110         return err;
2111 }
2112
2113 static int __devinit b44_init_one(struct ssb_device *sdev,
2114                                   const struct ssb_device_id *ent)
2115 {
2116         static int b44_version_printed = 0;
2117         struct net_device *dev;
2118         struct b44 *bp;
2119         int err;
2120
2121         instance++;
2122
2123         if (b44_version_printed++ == 0)
2124                 printk(KERN_INFO "%s", version);
2125
2126
2127         dev = alloc_etherdev(sizeof(*bp));
2128         if (!dev) {
2129                 dev_err(sdev->dev, "Etherdev alloc failed, aborting.\n");
2130                 err = -ENOMEM;
2131                 goto out;
2132         }
2133
2134         SET_NETDEV_DEV(dev, sdev->dev);
2135
2136         /* No interesting netdevice features in this card... */
2137         dev->features |= 0;
2138
2139         bp = netdev_priv(dev);
2140         bp->sdev = sdev;
2141         bp->dev = dev;
2142
2143         bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
2144
2145         spin_lock_init(&bp->lock);
2146
2147         bp->rx_pending = B44_DEF_RX_RING_PENDING;
2148         bp->tx_pending = B44_DEF_TX_RING_PENDING;
2149
2150         dev->open = b44_open;
2151         dev->stop = b44_close;
2152         dev->hard_start_xmit = b44_start_xmit;
2153         dev->get_stats = b44_get_stats;
2154         dev->set_multicast_list = b44_set_rx_mode;
2155         dev->set_mac_address = b44_set_mac_addr;
2156         dev->do_ioctl = b44_ioctl;
2157         dev->tx_timeout = b44_tx_timeout;
2158         netif_napi_add(dev, &bp->napi, b44_poll, 64);
2159         dev->watchdog_timeo = B44_TX_TIMEOUT;
2160 #ifdef CONFIG_NET_POLL_CONTROLLER
2161         dev->poll_controller = b44_poll_controller;
2162 #endif
2163         dev->change_mtu = b44_change_mtu;
2164         dev->irq = sdev->irq;
2165         SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
2166
2167         netif_carrier_off(dev);
2168
2169         err = ssb_bus_powerup(sdev->bus, 0);
2170         if (err) {
2171                 dev_err(sdev->dev,
2172                         "Failed to powerup the bus\n");
2173                 goto err_out_free_dev;
2174         }
2175         err = ssb_dma_set_mask(sdev, DMA_30BIT_MASK);
2176         if (err) {
2177                 dev_err(sdev->dev,
2178                         "Required 30BIT DMA mask unsupported by the system.\n");
2179                 goto err_out_powerdown;
2180         }
2181         err = b44_get_invariants(bp);
2182         if (err) {
2183                 dev_err(sdev->dev,
2184                         "Problem fetching invariants of chip, aborting.\n");
2185                 goto err_out_powerdown;
2186         }
2187
2188         bp->mii_if.dev = dev;
2189         bp->mii_if.mdio_read = b44_mii_read;
2190         bp->mii_if.mdio_write = b44_mii_write;
2191         bp->mii_if.phy_id = bp->phy_addr;
2192         bp->mii_if.phy_id_mask = 0x1f;
2193         bp->mii_if.reg_num_mask = 0x1f;
2194
2195         /* By default, advertise all speed/duplex settings. */
2196         bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2197                       B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2198
2199         /* By default, auto-negotiate PAUSE. */
2200         bp->flags |= B44_FLAG_PAUSE_AUTO;
2201
2202         err = register_netdev(dev);
2203         if (err) {
2204                 dev_err(sdev->dev, "Cannot register net device, aborting.\n");
2205                 goto err_out_powerdown;
2206         }
2207
2208         ssb_set_drvdata(sdev, dev);
2209
2210         /* Chip reset provides power to the b44 MAC & PCI cores, which
2211          * is necessary for MAC register access.
2212          */
2213         b44_chip_reset(bp, B44_CHIP_RESET_FULL);
2214
2215         printk(KERN_INFO "%s: Broadcom 44xx/47xx 10/100BaseT Ethernet %pM\n",
2216                dev->name, dev->dev_addr);
2217
2218         return 0;
2219
2220 err_out_powerdown:
2221         ssb_bus_may_powerdown(sdev->bus);
2222
2223 err_out_free_dev:
2224         free_netdev(dev);
2225
2226 out:
2227         return err;
2228 }
2229
2230 static void __devexit b44_remove_one(struct ssb_device *sdev)
2231 {
2232         struct net_device *dev = ssb_get_drvdata(sdev);
2233
2234         unregister_netdev(dev);
2235         ssb_bus_may_powerdown(sdev->bus);
2236         free_netdev(dev);
2237         ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2238         ssb_set_drvdata(sdev, NULL);
2239 }
2240
2241 static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
2242 {
2243         struct net_device *dev = ssb_get_drvdata(sdev);
2244         struct b44 *bp = netdev_priv(dev);
2245
2246         if (!netif_running(dev))
2247                 return 0;
2248
2249         del_timer_sync(&bp->timer);
2250
2251         spin_lock_irq(&bp->lock);
2252
2253         b44_halt(bp);
2254         netif_carrier_off(bp->dev);
2255         netif_device_detach(bp->dev);
2256         b44_free_rings(bp);
2257
2258         spin_unlock_irq(&bp->lock);
2259
2260         free_irq(dev->irq, dev);
2261         if (bp->flags & B44_FLAG_WOL_ENABLE) {
2262                 b44_init_hw(bp, B44_PARTIAL_RESET);
2263                 b44_setup_wol(bp);
2264         }
2265
2266         ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2267         return 0;
2268 }
2269
2270 static int b44_resume(struct ssb_device *sdev)
2271 {
2272         struct net_device *dev = ssb_get_drvdata(sdev);
2273         struct b44 *bp = netdev_priv(dev);
2274         int rc = 0;
2275
2276         rc = ssb_bus_powerup(sdev->bus, 0);
2277         if (rc) {
2278                 dev_err(sdev->dev,
2279                         "Failed to powerup the bus\n");
2280                 return rc;
2281         }
2282
2283         if (!netif_running(dev))
2284                 return 0;
2285
2286         rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
2287         if (rc) {
2288                 printk(KERN_ERR PFX "%s: request_irq failed\n", dev->name);
2289                 return rc;
2290         }
2291
2292         spin_lock_irq(&bp->lock);
2293
2294         b44_init_rings(bp);
2295         b44_init_hw(bp, B44_FULL_RESET);
2296         netif_device_attach(bp->dev);
2297         spin_unlock_irq(&bp->lock);
2298
2299         b44_enable_ints(bp);
2300         netif_wake_queue(dev);
2301
2302         mod_timer(&bp->timer, jiffies + 1);
2303
2304         return 0;
2305 }
2306
2307 static struct ssb_driver b44_ssb_driver = {
2308         .name           = DRV_MODULE_NAME,
2309         .id_table       = b44_ssb_tbl,
2310         .probe          = b44_init_one,
2311         .remove         = __devexit_p(b44_remove_one),
2312         .suspend        = b44_suspend,
2313         .resume         = b44_resume,
2314 };
2315
2316 static inline int b44_pci_init(void)
2317 {
2318         int err = 0;
2319 #ifdef CONFIG_B44_PCI
2320         err = ssb_pcihost_register(&b44_pci_driver);
2321 #endif
2322         return err;
2323 }
2324
2325 static inline void b44_pci_exit(void)
2326 {
2327 #ifdef CONFIG_B44_PCI
2328         ssb_pcihost_unregister(&b44_pci_driver);
2329 #endif
2330 }
2331
2332 static int __init b44_init(void)
2333 {
2334         unsigned int dma_desc_align_size = dma_get_cache_alignment();
2335         int err;
2336
2337         /* Setup paramaters for syncing RX/TX DMA descriptors */
2338         dma_desc_align_mask = ~(dma_desc_align_size - 1);
2339         dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2340
2341         err = b44_pci_init();
2342         if (err)
2343                 return err;
2344         err = ssb_driver_register(&b44_ssb_driver);
2345         if (err)
2346                 b44_pci_exit();
2347         return err;
2348 }
2349
2350 static void __exit b44_cleanup(void)
2351 {
2352         ssb_driver_unregister(&b44_ssb_driver);
2353         b44_pci_exit();
2354 }
2355
2356 module_init(b44_init);
2357 module_exit(b44_cleanup);
2358