b44: Disable device on shutdown
[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           (RX_HEADER_LEN + 2)
77 #define RX_PKT_BUF_SZ           (1536 + RX_PKT_OFFSET)
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                 bp->force_copybreak = 1;
683         }
684
685         rh = (struct rx_header *) skb->data;
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);
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 + 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 (!bp->force_copybreak && 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                 received++;
833                 budget--;
834         next_pkt:
835                 bp->rx_prod = (bp->rx_prod + 1) &
836                         (B44_RX_RING_SIZE - 1);
837                 cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
838         }
839
840         bp->rx_cons = cons;
841         bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
842
843         return received;
844 }
845
846 static int b44_poll(struct napi_struct *napi, int budget)
847 {
848         struct b44 *bp = container_of(napi, struct b44, napi);
849         int work_done;
850
851         spin_lock_irq(&bp->lock);
852
853         if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
854                 /* spin_lock(&bp->tx_lock); */
855                 b44_tx(bp);
856                 /* spin_unlock(&bp->tx_lock); */
857         }
858         spin_unlock_irq(&bp->lock);
859
860         work_done = 0;
861         if (bp->istat & ISTAT_RX)
862                 work_done += b44_rx(bp, budget);
863
864         if (bp->istat & ISTAT_ERRORS) {
865                 unsigned long flags;
866
867                 spin_lock_irqsave(&bp->lock, flags);
868                 b44_halt(bp);
869                 b44_init_rings(bp);
870                 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
871                 netif_wake_queue(bp->dev);
872                 spin_unlock_irqrestore(&bp->lock, flags);
873                 work_done = 0;
874         }
875
876         if (work_done < budget) {
877                 netif_rx_complete(napi);
878                 b44_enable_ints(bp);
879         }
880
881         return work_done;
882 }
883
884 static irqreturn_t b44_interrupt(int irq, void *dev_id)
885 {
886         struct net_device *dev = dev_id;
887         struct b44 *bp = netdev_priv(dev);
888         u32 istat, imask;
889         int handled = 0;
890
891         spin_lock(&bp->lock);
892
893         istat = br32(bp, B44_ISTAT);
894         imask = br32(bp, B44_IMASK);
895
896         /* The interrupt mask register controls which interrupt bits
897          * will actually raise an interrupt to the CPU when set by hw/firmware,
898          * but doesn't mask off the bits.
899          */
900         istat &= imask;
901         if (istat) {
902                 handled = 1;
903
904                 if (unlikely(!netif_running(dev))) {
905                         printk(KERN_INFO "%s: late interrupt.\n", dev->name);
906                         goto irq_ack;
907                 }
908
909                 if (netif_rx_schedule_prep(&bp->napi)) {
910                         /* NOTE: These writes are posted by the readback of
911                          *       the ISTAT register below.
912                          */
913                         bp->istat = istat;
914                         __b44_disable_ints(bp);
915                         __netif_rx_schedule(&bp->napi);
916                 } else {
917                         printk(KERN_ERR PFX "%s: Error, poll already scheduled\n",
918                                dev->name);
919                 }
920
921 irq_ack:
922                 bw32(bp, B44_ISTAT, istat);
923                 br32(bp, B44_ISTAT);
924         }
925         spin_unlock(&bp->lock);
926         return IRQ_RETVAL(handled);
927 }
928
929 static void b44_tx_timeout(struct net_device *dev)
930 {
931         struct b44 *bp = netdev_priv(dev);
932
933         printk(KERN_ERR PFX "%s: transmit timed out, resetting\n",
934                dev->name);
935
936         spin_lock_irq(&bp->lock);
937
938         b44_halt(bp);
939         b44_init_rings(bp);
940         b44_init_hw(bp, B44_FULL_RESET);
941
942         spin_unlock_irq(&bp->lock);
943
944         b44_enable_ints(bp);
945
946         netif_wake_queue(dev);
947 }
948
949 static int b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
950 {
951         struct b44 *bp = netdev_priv(dev);
952         int rc = NETDEV_TX_OK;
953         dma_addr_t mapping;
954         u32 len, entry, ctrl;
955
956         len = skb->len;
957         spin_lock_irq(&bp->lock);
958
959         /* This is a hard error, log it. */
960         if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
961                 netif_stop_queue(dev);
962                 printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
963                        dev->name);
964                 goto err_out;
965         }
966
967         mapping = ssb_dma_map_single(bp->sdev, skb->data, len, DMA_TO_DEVICE);
968         if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_30BIT_MASK) {
969                 struct sk_buff *bounce_skb;
970
971                 /* Chip can't handle DMA to/from >1GB, use bounce buffer */
972                 if (!ssb_dma_mapping_error(bp->sdev, mapping))
973                         ssb_dma_unmap_single(bp->sdev, mapping, len,
974                                              DMA_TO_DEVICE);
975
976                 bounce_skb = __dev_alloc_skb(len, GFP_ATOMIC | GFP_DMA);
977                 if (!bounce_skb)
978                         goto err_out;
979
980                 mapping = ssb_dma_map_single(bp->sdev, bounce_skb->data,
981                                              len, DMA_TO_DEVICE);
982                 if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_30BIT_MASK) {
983                         if (!ssb_dma_mapping_error(bp->sdev, mapping))
984                                 ssb_dma_unmap_single(bp->sdev, mapping,
985                                                      len, DMA_TO_DEVICE);
986                         dev_kfree_skb_any(bounce_skb);
987                         goto err_out;
988                 }
989
990                 skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
991                 dev_kfree_skb_any(skb);
992                 skb = bounce_skb;
993         }
994
995         entry = bp->tx_prod;
996         bp->tx_buffers[entry].skb = skb;
997         bp->tx_buffers[entry].mapping = mapping;
998
999         ctrl  = (len & DESC_CTRL_LEN);
1000         ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
1001         if (entry == (B44_TX_RING_SIZE - 1))
1002                 ctrl |= DESC_CTRL_EOT;
1003
1004         bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1005         bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1006
1007         if (bp->flags & B44_FLAG_TX_RING_HACK)
1008                 b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
1009                                             entry * sizeof(bp->tx_ring[0]),
1010                                             DMA_TO_DEVICE);
1011
1012         entry = NEXT_TX(entry);
1013
1014         bp->tx_prod = entry;
1015
1016         wmb();
1017
1018         bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1019         if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1020                 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1021         if (bp->flags & B44_FLAG_REORDER_BUG)
1022                 br32(bp, B44_DMATX_PTR);
1023
1024         if (TX_BUFFS_AVAIL(bp) < 1)
1025                 netif_stop_queue(dev);
1026
1027         dev->trans_start = jiffies;
1028
1029 out_unlock:
1030         spin_unlock_irq(&bp->lock);
1031
1032         return rc;
1033
1034 err_out:
1035         rc = NETDEV_TX_BUSY;
1036         goto out_unlock;
1037 }
1038
1039 static int b44_change_mtu(struct net_device *dev, int new_mtu)
1040 {
1041         struct b44 *bp = netdev_priv(dev);
1042
1043         if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
1044                 return -EINVAL;
1045
1046         if (!netif_running(dev)) {
1047                 /* We'll just catch it later when the
1048                  * device is up'd.
1049                  */
1050                 dev->mtu = new_mtu;
1051                 return 0;
1052         }
1053
1054         spin_lock_irq(&bp->lock);
1055         b44_halt(bp);
1056         dev->mtu = new_mtu;
1057         b44_init_rings(bp);
1058         b44_init_hw(bp, B44_FULL_RESET);
1059         spin_unlock_irq(&bp->lock);
1060
1061         b44_enable_ints(bp);
1062
1063         return 0;
1064 }
1065
1066 /* Free up pending packets in all rx/tx rings.
1067  *
1068  * The chip has been shut down and the driver detached from
1069  * the networking, so no interrupts or new tx packets will
1070  * end up in the driver.  bp->lock is not held and we are not
1071  * in an interrupt context and thus may sleep.
1072  */
1073 static void b44_free_rings(struct b44 *bp)
1074 {
1075         struct ring_info *rp;
1076         int i;
1077
1078         for (i = 0; i < B44_RX_RING_SIZE; i++) {
1079                 rp = &bp->rx_buffers[i];
1080
1081                 if (rp->skb == NULL)
1082                         continue;
1083                 ssb_dma_unmap_single(bp->sdev, rp->mapping, RX_PKT_BUF_SZ,
1084                                      DMA_FROM_DEVICE);
1085                 dev_kfree_skb_any(rp->skb);
1086                 rp->skb = NULL;
1087         }
1088
1089         /* XXX needs changes once NETIF_F_SG is set... */
1090         for (i = 0; i < B44_TX_RING_SIZE; i++) {
1091                 rp = &bp->tx_buffers[i];
1092
1093                 if (rp->skb == NULL)
1094                         continue;
1095                 ssb_dma_unmap_single(bp->sdev, rp->mapping, rp->skb->len,
1096                                      DMA_TO_DEVICE);
1097                 dev_kfree_skb_any(rp->skb);
1098                 rp->skb = NULL;
1099         }
1100 }
1101
1102 /* Initialize tx/rx rings for packet processing.
1103  *
1104  * The chip has been shut down and the driver detached from
1105  * the networking, so no interrupts or new tx packets will
1106  * end up in the driver.
1107  */
1108 static void b44_init_rings(struct b44 *bp)
1109 {
1110         int i;
1111
1112         b44_free_rings(bp);
1113
1114         memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1115         memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1116
1117         if (bp->flags & B44_FLAG_RX_RING_HACK)
1118                 ssb_dma_sync_single_for_device(bp->sdev, bp->rx_ring_dma,
1119                                                DMA_TABLE_BYTES,
1120                                                DMA_BIDIRECTIONAL);
1121
1122         if (bp->flags & B44_FLAG_TX_RING_HACK)
1123                 ssb_dma_sync_single_for_device(bp->sdev, bp->tx_ring_dma,
1124                                                DMA_TABLE_BYTES,
1125                                                DMA_TO_DEVICE);
1126
1127         for (i = 0; i < bp->rx_pending; i++) {
1128                 if (b44_alloc_rx_skb(bp, -1, i) < 0)
1129                         break;
1130         }
1131 }
1132
1133 /*
1134  * Must not be invoked with interrupt sources disabled and
1135  * the hardware shutdown down.
1136  */
1137 static void b44_free_consistent(struct b44 *bp)
1138 {
1139         kfree(bp->rx_buffers);
1140         bp->rx_buffers = NULL;
1141         kfree(bp->tx_buffers);
1142         bp->tx_buffers = NULL;
1143         if (bp->rx_ring) {
1144                 if (bp->flags & B44_FLAG_RX_RING_HACK) {
1145                         ssb_dma_unmap_single(bp->sdev, bp->rx_ring_dma,
1146                                              DMA_TABLE_BYTES,
1147                                              DMA_BIDIRECTIONAL);
1148                         kfree(bp->rx_ring);
1149                 } else
1150                         ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
1151                                                 bp->rx_ring, bp->rx_ring_dma,
1152                                                 GFP_KERNEL);
1153                 bp->rx_ring = NULL;
1154                 bp->flags &= ~B44_FLAG_RX_RING_HACK;
1155         }
1156         if (bp->tx_ring) {
1157                 if (bp->flags & B44_FLAG_TX_RING_HACK) {
1158                         ssb_dma_unmap_single(bp->sdev, bp->tx_ring_dma,
1159                                              DMA_TABLE_BYTES,
1160                                              DMA_TO_DEVICE);
1161                         kfree(bp->tx_ring);
1162                 } else
1163                         ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
1164                                                 bp->tx_ring, bp->tx_ring_dma,
1165                                                 GFP_KERNEL);
1166                 bp->tx_ring = NULL;
1167                 bp->flags &= ~B44_FLAG_TX_RING_HACK;
1168         }
1169 }
1170
1171 /*
1172  * Must not be invoked with interrupt sources disabled and
1173  * the hardware shutdown down.  Can sleep.
1174  */
1175 static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
1176 {
1177         int size;
1178
1179         size  = B44_RX_RING_SIZE * sizeof(struct ring_info);
1180         bp->rx_buffers = kzalloc(size, gfp);
1181         if (!bp->rx_buffers)
1182                 goto out_err;
1183
1184         size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1185         bp->tx_buffers = kzalloc(size, gfp);
1186         if (!bp->tx_buffers)
1187                 goto out_err;
1188
1189         size = DMA_TABLE_BYTES;
1190         bp->rx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->rx_ring_dma, gfp);
1191         if (!bp->rx_ring) {
1192                 /* Allocation may have failed due to pci_alloc_consistent
1193                    insisting on use of GFP_DMA, which is more restrictive
1194                    than necessary...  */
1195                 struct dma_desc *rx_ring;
1196                 dma_addr_t rx_ring_dma;
1197
1198                 rx_ring = kzalloc(size, gfp);
1199                 if (!rx_ring)
1200                         goto out_err;
1201
1202                 rx_ring_dma = ssb_dma_map_single(bp->sdev, rx_ring,
1203                                                  DMA_TABLE_BYTES,
1204                                                  DMA_BIDIRECTIONAL);
1205
1206                 if (ssb_dma_mapping_error(bp->sdev, rx_ring_dma) ||
1207                         rx_ring_dma + size > DMA_30BIT_MASK) {
1208                         kfree(rx_ring);
1209                         goto out_err;
1210                 }
1211
1212                 bp->rx_ring = rx_ring;
1213                 bp->rx_ring_dma = rx_ring_dma;
1214                 bp->flags |= B44_FLAG_RX_RING_HACK;
1215         }
1216
1217         bp->tx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->tx_ring_dma, gfp);
1218         if (!bp->tx_ring) {
1219                 /* Allocation may have failed due to ssb_dma_alloc_consistent
1220                    insisting on use of GFP_DMA, which is more restrictive
1221                    than necessary...  */
1222                 struct dma_desc *tx_ring;
1223                 dma_addr_t tx_ring_dma;
1224
1225                 tx_ring = kzalloc(size, gfp);
1226                 if (!tx_ring)
1227                         goto out_err;
1228
1229                 tx_ring_dma = ssb_dma_map_single(bp->sdev, tx_ring,
1230                                             DMA_TABLE_BYTES,
1231                                             DMA_TO_DEVICE);
1232
1233                 if (ssb_dma_mapping_error(bp->sdev, tx_ring_dma) ||
1234                         tx_ring_dma + size > DMA_30BIT_MASK) {
1235                         kfree(tx_ring);
1236                         goto out_err;
1237                 }
1238
1239                 bp->tx_ring = tx_ring;
1240                 bp->tx_ring_dma = tx_ring_dma;
1241                 bp->flags |= B44_FLAG_TX_RING_HACK;
1242         }
1243
1244         return 0;
1245
1246 out_err:
1247         b44_free_consistent(bp);
1248         return -ENOMEM;
1249 }
1250
1251 /* bp->lock is held. */
1252 static void b44_clear_stats(struct b44 *bp)
1253 {
1254         unsigned long reg;
1255
1256         bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1257         for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1258                 br32(bp, reg);
1259         for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1260                 br32(bp, reg);
1261 }
1262
1263 /* bp->lock is held. */
1264 static void b44_chip_reset(struct b44 *bp, int reset_kind)
1265 {
1266         struct ssb_device *sdev = bp->sdev;
1267         bool was_enabled;
1268
1269         was_enabled = ssb_device_is_enabled(bp->sdev);
1270
1271         ssb_device_enable(bp->sdev, 0);
1272         ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
1273
1274         if (was_enabled) {
1275                 bw32(bp, B44_RCV_LAZY, 0);
1276                 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1277                 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1);
1278                 bw32(bp, B44_DMATX_CTRL, 0);
1279                 bp->tx_prod = bp->tx_cons = 0;
1280                 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1281                         b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1282                                      100, 0);
1283                 }
1284                 bw32(bp, B44_DMARX_CTRL, 0);
1285                 bp->rx_prod = bp->rx_cons = 0;
1286         }
1287
1288         b44_clear_stats(bp);
1289
1290         /*
1291          * Don't enable PHY if we are doing a partial reset
1292          * we are probably going to power down
1293          */
1294         if (reset_kind == B44_CHIP_RESET_PARTIAL)
1295                 return;
1296
1297         switch (sdev->bus->bustype) {
1298         case SSB_BUSTYPE_SSB:
1299                 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1300                      (((ssb_clockspeed(sdev->bus) + (B44_MDC_RATIO / 2)) / B44_MDC_RATIO)
1301                      & MDIO_CTRL_MAXF_MASK)));
1302                 break;
1303         case SSB_BUSTYPE_PCI:
1304         case SSB_BUSTYPE_PCMCIA:
1305                 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1306                      (0x0d & MDIO_CTRL_MAXF_MASK)));
1307                 break;
1308         }
1309
1310         br32(bp, B44_MDIO_CTRL);
1311
1312         if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1313                 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1314                 br32(bp, B44_ENET_CTRL);
1315                 bp->flags &= ~B44_FLAG_INTERNAL_PHY;
1316         } else {
1317                 u32 val = br32(bp, B44_DEVCTRL);
1318
1319                 if (val & DEVCTRL_EPR) {
1320                         bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1321                         br32(bp, B44_DEVCTRL);
1322                         udelay(100);
1323                 }
1324                 bp->flags |= B44_FLAG_INTERNAL_PHY;
1325         }
1326 }
1327
1328 /* bp->lock is held. */
1329 static void b44_halt(struct b44 *bp)
1330 {
1331         b44_disable_ints(bp);
1332         /* reset PHY */
1333         b44_phy_reset(bp);
1334         /* power down PHY */
1335         printk(KERN_INFO PFX "%s: powering down PHY\n", bp->dev->name);
1336         bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
1337         /* now reset the chip, but without enabling the MAC&PHY
1338          * part of it. This has to be done _after_ we shut down the PHY */
1339         b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1340 }
1341
1342 /* bp->lock is held. */
1343 static void __b44_set_mac_addr(struct b44 *bp)
1344 {
1345         bw32(bp, B44_CAM_CTRL, 0);
1346         if (!(bp->dev->flags & IFF_PROMISC)) {
1347                 u32 val;
1348
1349                 __b44_cam_write(bp, bp->dev->dev_addr, 0);
1350                 val = br32(bp, B44_CAM_CTRL);
1351                 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1352         }
1353 }
1354
1355 static int b44_set_mac_addr(struct net_device *dev, void *p)
1356 {
1357         struct b44 *bp = netdev_priv(dev);
1358         struct sockaddr *addr = p;
1359         u32 val;
1360
1361         if (netif_running(dev))
1362                 return -EBUSY;
1363
1364         if (!is_valid_ether_addr(addr->sa_data))
1365                 return -EINVAL;
1366
1367         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1368
1369         spin_lock_irq(&bp->lock);
1370
1371         val = br32(bp, B44_RXCONFIG);
1372         if (!(val & RXCONFIG_CAM_ABSENT))
1373                 __b44_set_mac_addr(bp);
1374
1375         spin_unlock_irq(&bp->lock);
1376
1377         return 0;
1378 }
1379
1380 /* Called at device open time to get the chip ready for
1381  * packet processing.  Invoked with bp->lock held.
1382  */
1383 static void __b44_set_rx_mode(struct net_device *);
1384 static void b44_init_hw(struct b44 *bp, int reset_kind)
1385 {
1386         u32 val;
1387
1388         b44_chip_reset(bp, B44_CHIP_RESET_FULL);
1389         if (reset_kind == B44_FULL_RESET) {
1390                 b44_phy_reset(bp);
1391                 b44_setup_phy(bp);
1392         }
1393
1394         /* Enable CRC32, set proper LED modes and power on PHY */
1395         bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
1396         bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
1397
1398         /* This sets the MAC address too.  */
1399         __b44_set_rx_mode(bp->dev);
1400
1401         /* MTU + eth header + possible VLAN tag + struct rx_header */
1402         bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1403         bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1404
1405         bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
1406         if (reset_kind == B44_PARTIAL_RESET) {
1407                 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1408                                       (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1409         } else {
1410                 bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
1411                 bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
1412                 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1413                                       (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1414                 bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
1415
1416                 bw32(bp, B44_DMARX_PTR, bp->rx_pending);
1417                 bp->rx_prod = bp->rx_pending;
1418
1419                 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1420         }
1421
1422         val = br32(bp, B44_ENET_CTRL);
1423         bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
1424 }
1425
1426 static 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         init_timer(&bp->timer);
1452         bp->timer.expires = jiffies + HZ;
1453         bp->timer.data = (unsigned long) bp;
1454         bp->timer.function = b44_timer;
1455         add_timer(&bp->timer);
1456
1457         b44_enable_ints(bp);
1458         netif_start_queue(dev);
1459 out:
1460         return err;
1461 }
1462
1463 #ifdef CONFIG_NET_POLL_CONTROLLER
1464 /*
1465  * Polling receive - used by netconsole and other diagnostic tools
1466  * to allow network i/o with interrupts disabled.
1467  */
1468 static void b44_poll_controller(struct net_device *dev)
1469 {
1470         disable_irq(dev->irq);
1471         b44_interrupt(dev->irq, dev);
1472         enable_irq(dev->irq);
1473 }
1474 #endif
1475
1476 static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
1477 {
1478         u32 i;
1479         u32 *pattern = (u32 *) pp;
1480
1481         for (i = 0; i < bytes; i += sizeof(u32)) {
1482                 bw32(bp, B44_FILT_ADDR, table_offset + i);
1483                 bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
1484         }
1485 }
1486
1487 static int b44_magic_pattern(u8 *macaddr, u8 *ppattern, u8 *pmask, int offset)
1488 {
1489         int magicsync = 6;
1490         int k, j, len = offset;
1491         int ethaddr_bytes = ETH_ALEN;
1492
1493         memset(ppattern + offset, 0xff, magicsync);
1494         for (j = 0; j < magicsync; j++)
1495                 set_bit(len++, (unsigned long *) pmask);
1496
1497         for (j = 0; j < B44_MAX_PATTERNS; j++) {
1498                 if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
1499                         ethaddr_bytes = ETH_ALEN;
1500                 else
1501                         ethaddr_bytes = B44_PATTERN_SIZE - len;
1502                 if (ethaddr_bytes <=0)
1503                         break;
1504                 for (k = 0; k< ethaddr_bytes; k++) {
1505                         ppattern[offset + magicsync +
1506                                 (j * ETH_ALEN) + k] = macaddr[k];
1507                         len++;
1508                         set_bit(len, (unsigned long *) pmask);
1509                 }
1510         }
1511         return len - 1;
1512 }
1513
1514 /* Setup magic packet patterns in the b44 WOL
1515  * pattern matching filter.
1516  */
1517 static void b44_setup_pseudo_magicp(struct b44 *bp)
1518 {
1519
1520         u32 val;
1521         int plen0, plen1, plen2;
1522         u8 *pwol_pattern;
1523         u8 pwol_mask[B44_PMASK_SIZE];
1524
1525         pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
1526         if (!pwol_pattern) {
1527                 printk(KERN_ERR PFX "Memory not available for WOL\n");
1528                 return;
1529         }
1530
1531         /* Ipv4 magic packet pattern - pattern 0.*/
1532         memset(pwol_mask, 0, B44_PMASK_SIZE);
1533         plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1534                                   B44_ETHIPV4UDP_HLEN);
1535
1536         bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
1537         bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
1538
1539         /* Raw ethernet II magic packet pattern - pattern 1 */
1540         memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1541         memset(pwol_mask, 0, B44_PMASK_SIZE);
1542         plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1543                                   ETH_HLEN);
1544
1545         bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1546                        B44_PATTERN_BASE + B44_PATTERN_SIZE);
1547         bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1548                        B44_PMASK_BASE + B44_PMASK_SIZE);
1549
1550         /* Ipv6 magic packet pattern - pattern 2 */
1551         memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1552         memset(pwol_mask, 0, B44_PMASK_SIZE);
1553         plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1554                                   B44_ETHIPV6UDP_HLEN);
1555
1556         bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1557                        B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
1558         bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1559                        B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
1560
1561         kfree(pwol_pattern);
1562
1563         /* set these pattern's lengths: one less than each real length */
1564         val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
1565         bw32(bp, B44_WKUP_LEN, val);
1566
1567         /* enable wakeup pattern matching */
1568         val = br32(bp, B44_DEVCTRL);
1569         bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
1570
1571 }
1572
1573 #ifdef CONFIG_B44_PCI
1574 static void b44_setup_wol_pci(struct b44 *bp)
1575 {
1576         u16 val;
1577
1578         if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
1579                 bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
1580                 pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
1581                 pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
1582         }
1583 }
1584 #else
1585 static inline void b44_setup_wol_pci(struct b44 *bp) { }
1586 #endif /* CONFIG_B44_PCI */
1587
1588 static void b44_setup_wol(struct b44 *bp)
1589 {
1590         u32 val;
1591
1592         bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
1593
1594         if (bp->flags & B44_FLAG_B0_ANDLATER) {
1595
1596                 bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
1597
1598                 val = bp->dev->dev_addr[2] << 24 |
1599                         bp->dev->dev_addr[3] << 16 |
1600                         bp->dev->dev_addr[4] << 8 |
1601                         bp->dev->dev_addr[5];
1602                 bw32(bp, B44_ADDR_LO, val);
1603
1604                 val = bp->dev->dev_addr[0] << 8 |
1605                         bp->dev->dev_addr[1];
1606                 bw32(bp, B44_ADDR_HI, val);
1607
1608                 val = br32(bp, B44_DEVCTRL);
1609                 bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
1610
1611         } else {
1612                 b44_setup_pseudo_magicp(bp);
1613         }
1614         b44_setup_wol_pci(bp);
1615 }
1616
1617 static int b44_close(struct net_device *dev)
1618 {
1619         struct b44 *bp = netdev_priv(dev);
1620
1621         netif_stop_queue(dev);
1622
1623         napi_disable(&bp->napi);
1624
1625         del_timer_sync(&bp->timer);
1626
1627         spin_lock_irq(&bp->lock);
1628
1629         b44_halt(bp);
1630         b44_free_rings(bp);
1631         netif_carrier_off(dev);
1632
1633         spin_unlock_irq(&bp->lock);
1634
1635         free_irq(dev->irq, dev);
1636
1637         if (bp->flags & B44_FLAG_WOL_ENABLE) {
1638                 b44_init_hw(bp, B44_PARTIAL_RESET);
1639                 b44_setup_wol(bp);
1640         }
1641
1642         b44_free_consistent(bp);
1643
1644         return 0;
1645 }
1646
1647 static struct net_device_stats *b44_get_stats(struct net_device *dev)
1648 {
1649         struct b44 *bp = netdev_priv(dev);
1650         struct net_device_stats *nstat = &bp->stats;
1651         struct b44_hw_stats *hwstat = &bp->hw_stats;
1652
1653         /* Convert HW stats into netdevice stats. */
1654         nstat->rx_packets = hwstat->rx_pkts;
1655         nstat->tx_packets = hwstat->tx_pkts;
1656         nstat->rx_bytes   = hwstat->rx_octets;
1657         nstat->tx_bytes   = hwstat->tx_octets;
1658         nstat->tx_errors  = (hwstat->tx_jabber_pkts +
1659                              hwstat->tx_oversize_pkts +
1660                              hwstat->tx_underruns +
1661                              hwstat->tx_excessive_cols +
1662                              hwstat->tx_late_cols);
1663         nstat->multicast  = hwstat->tx_multicast_pkts;
1664         nstat->collisions = hwstat->tx_total_cols;
1665
1666         nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1667                                    hwstat->rx_undersize);
1668         nstat->rx_over_errors   = hwstat->rx_missed_pkts;
1669         nstat->rx_frame_errors  = hwstat->rx_align_errs;
1670         nstat->rx_crc_errors    = hwstat->rx_crc_errs;
1671         nstat->rx_errors        = (hwstat->rx_jabber_pkts +
1672                                    hwstat->rx_oversize_pkts +
1673                                    hwstat->rx_missed_pkts +
1674                                    hwstat->rx_crc_align_errs +
1675                                    hwstat->rx_undersize +
1676                                    hwstat->rx_crc_errs +
1677                                    hwstat->rx_align_errs +
1678                                    hwstat->rx_symbol_errs);
1679
1680         nstat->tx_aborted_errors = hwstat->tx_underruns;
1681 #if 0
1682         /* Carrier lost counter seems to be broken for some devices */
1683         nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1684 #endif
1685
1686         return nstat;
1687 }
1688
1689 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1690 {
1691         struct dev_mc_list *mclist;
1692         int i, num_ents;
1693
1694         num_ents = min_t(int, dev->mc_count, B44_MCAST_TABLE_SIZE);
1695         mclist = dev->mc_list;
1696         for (i = 0; mclist && i < num_ents; i++, mclist = mclist->next) {
1697                 __b44_cam_write(bp, mclist->dmi_addr, i + 1);
1698         }
1699         return i+1;
1700 }
1701
1702 static void __b44_set_rx_mode(struct net_device *dev)
1703 {
1704         struct b44 *bp = netdev_priv(dev);
1705         u32 val;
1706
1707         val = br32(bp, B44_RXCONFIG);
1708         val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1709         if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
1710                 val |= RXCONFIG_PROMISC;
1711                 bw32(bp, B44_RXCONFIG, val);
1712         } else {
1713                 unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
1714                 int i = 1;
1715
1716                 __b44_set_mac_addr(bp);
1717
1718                 if ((dev->flags & IFF_ALLMULTI) ||
1719                     (dev->mc_count > B44_MCAST_TABLE_SIZE))
1720                         val |= RXCONFIG_ALLMULTI;
1721                 else
1722                         i = __b44_load_mcast(bp, dev);
1723
1724                 for (; i < 64; i++)
1725                         __b44_cam_write(bp, zero, i);
1726
1727                 bw32(bp, B44_RXCONFIG, val);
1728                 val = br32(bp, B44_CAM_CTRL);
1729                 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1730         }
1731 }
1732
1733 static void b44_set_rx_mode(struct net_device *dev)
1734 {
1735         struct b44 *bp = netdev_priv(dev);
1736
1737         spin_lock_irq(&bp->lock);
1738         __b44_set_rx_mode(dev);
1739         spin_unlock_irq(&bp->lock);
1740 }
1741
1742 static u32 b44_get_msglevel(struct net_device *dev)
1743 {
1744         struct b44 *bp = netdev_priv(dev);
1745         return bp->msg_enable;
1746 }
1747
1748 static void b44_set_msglevel(struct net_device *dev, u32 value)
1749 {
1750         struct b44 *bp = netdev_priv(dev);
1751         bp->msg_enable = value;
1752 }
1753
1754 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1755 {
1756         struct b44 *bp = netdev_priv(dev);
1757         struct ssb_bus *bus = bp->sdev->bus;
1758
1759         strncpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
1760         strncpy(info->version, DRV_MODULE_VERSION, sizeof(info->driver));
1761         switch (bus->bustype) {
1762         case SSB_BUSTYPE_PCI:
1763                 strncpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
1764                 break;
1765         case SSB_BUSTYPE_PCMCIA:
1766         case SSB_BUSTYPE_SSB:
1767                 strncpy(info->bus_info, "SSB", sizeof(info->bus_info));
1768                 break;
1769         }
1770 }
1771
1772 static int b44_nway_reset(struct net_device *dev)
1773 {
1774         struct b44 *bp = netdev_priv(dev);
1775         u32 bmcr;
1776         int r;
1777
1778         spin_lock_irq(&bp->lock);
1779         b44_readphy(bp, MII_BMCR, &bmcr);
1780         b44_readphy(bp, MII_BMCR, &bmcr);
1781         r = -EINVAL;
1782         if (bmcr & BMCR_ANENABLE) {
1783                 b44_writephy(bp, MII_BMCR,
1784                              bmcr | BMCR_ANRESTART);
1785                 r = 0;
1786         }
1787         spin_unlock_irq(&bp->lock);
1788
1789         return r;
1790 }
1791
1792 static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1793 {
1794         struct b44 *bp = netdev_priv(dev);
1795
1796         cmd->supported = (SUPPORTED_Autoneg);
1797         cmd->supported |= (SUPPORTED_100baseT_Half |
1798                           SUPPORTED_100baseT_Full |
1799                           SUPPORTED_10baseT_Half |
1800                           SUPPORTED_10baseT_Full |
1801                           SUPPORTED_MII);
1802
1803         cmd->advertising = 0;
1804         if (bp->flags & B44_FLAG_ADV_10HALF)
1805                 cmd->advertising |= ADVERTISED_10baseT_Half;
1806         if (bp->flags & B44_FLAG_ADV_10FULL)
1807                 cmd->advertising |= ADVERTISED_10baseT_Full;
1808         if (bp->flags & B44_FLAG_ADV_100HALF)
1809                 cmd->advertising |= ADVERTISED_100baseT_Half;
1810         if (bp->flags & B44_FLAG_ADV_100FULL)
1811                 cmd->advertising |= ADVERTISED_100baseT_Full;
1812         cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1813         cmd->speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1814                 SPEED_100 : SPEED_10;
1815         cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1816                 DUPLEX_FULL : DUPLEX_HALF;
1817         cmd->port = 0;
1818         cmd->phy_address = bp->phy_addr;
1819         cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
1820                 XCVR_INTERNAL : XCVR_EXTERNAL;
1821         cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1822                 AUTONEG_DISABLE : AUTONEG_ENABLE;
1823         if (cmd->autoneg == AUTONEG_ENABLE)
1824                 cmd->advertising |= ADVERTISED_Autoneg;
1825         if (!netif_running(dev)){
1826                 cmd->speed = 0;
1827                 cmd->duplex = 0xff;
1828         }
1829         cmd->maxtxpkt = 0;
1830         cmd->maxrxpkt = 0;
1831         return 0;
1832 }
1833
1834 static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1835 {
1836         struct b44 *bp = netdev_priv(dev);
1837
1838         /* We do not support gigabit. */
1839         if (cmd->autoneg == AUTONEG_ENABLE) {
1840                 if (cmd->advertising &
1841                     (ADVERTISED_1000baseT_Half |
1842                      ADVERTISED_1000baseT_Full))
1843                         return -EINVAL;
1844         } else if ((cmd->speed != SPEED_100 &&
1845                     cmd->speed != SPEED_10) ||
1846                    (cmd->duplex != DUPLEX_HALF &&
1847                     cmd->duplex != DUPLEX_FULL)) {
1848                         return -EINVAL;
1849         }
1850
1851         spin_lock_irq(&bp->lock);
1852
1853         if (cmd->autoneg == AUTONEG_ENABLE) {
1854                 bp->flags &= ~(B44_FLAG_FORCE_LINK |
1855                                B44_FLAG_100_BASE_T |
1856                                B44_FLAG_FULL_DUPLEX |
1857                                B44_FLAG_ADV_10HALF |
1858                                B44_FLAG_ADV_10FULL |
1859                                B44_FLAG_ADV_100HALF |
1860                                B44_FLAG_ADV_100FULL);
1861                 if (cmd->advertising == 0) {
1862                         bp->flags |= (B44_FLAG_ADV_10HALF |
1863                                       B44_FLAG_ADV_10FULL |
1864                                       B44_FLAG_ADV_100HALF |
1865                                       B44_FLAG_ADV_100FULL);
1866                 } else {
1867                         if (cmd->advertising & ADVERTISED_10baseT_Half)
1868                                 bp->flags |= B44_FLAG_ADV_10HALF;
1869                         if (cmd->advertising & ADVERTISED_10baseT_Full)
1870                                 bp->flags |= B44_FLAG_ADV_10FULL;
1871                         if (cmd->advertising & ADVERTISED_100baseT_Half)
1872                                 bp->flags |= B44_FLAG_ADV_100HALF;
1873                         if (cmd->advertising & ADVERTISED_100baseT_Full)
1874                                 bp->flags |= B44_FLAG_ADV_100FULL;
1875                 }
1876         } else {
1877                 bp->flags |= B44_FLAG_FORCE_LINK;
1878                 bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
1879                 if (cmd->speed == SPEED_100)
1880                         bp->flags |= B44_FLAG_100_BASE_T;
1881                 if (cmd->duplex == DUPLEX_FULL)
1882                         bp->flags |= B44_FLAG_FULL_DUPLEX;
1883         }
1884
1885         if (netif_running(dev))
1886                 b44_setup_phy(bp);
1887
1888         spin_unlock_irq(&bp->lock);
1889
1890         return 0;
1891 }
1892
1893 static void b44_get_ringparam(struct net_device *dev,
1894                               struct ethtool_ringparam *ering)
1895 {
1896         struct b44 *bp = netdev_priv(dev);
1897
1898         ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1899         ering->rx_pending = bp->rx_pending;
1900
1901         /* XXX ethtool lacks a tx_max_pending, oops... */
1902 }
1903
1904 static int b44_set_ringparam(struct net_device *dev,
1905                              struct ethtool_ringparam *ering)
1906 {
1907         struct b44 *bp = netdev_priv(dev);
1908
1909         if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1910             (ering->rx_mini_pending != 0) ||
1911             (ering->rx_jumbo_pending != 0) ||
1912             (ering->tx_pending > B44_TX_RING_SIZE - 1))
1913                 return -EINVAL;
1914
1915         spin_lock_irq(&bp->lock);
1916
1917         bp->rx_pending = ering->rx_pending;
1918         bp->tx_pending = ering->tx_pending;
1919
1920         b44_halt(bp);
1921         b44_init_rings(bp);
1922         b44_init_hw(bp, B44_FULL_RESET);
1923         netif_wake_queue(bp->dev);
1924         spin_unlock_irq(&bp->lock);
1925
1926         b44_enable_ints(bp);
1927
1928         return 0;
1929 }
1930
1931 static void b44_get_pauseparam(struct net_device *dev,
1932                                 struct ethtool_pauseparam *epause)
1933 {
1934         struct b44 *bp = netdev_priv(dev);
1935
1936         epause->autoneg =
1937                 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1938         epause->rx_pause =
1939                 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
1940         epause->tx_pause =
1941                 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
1942 }
1943
1944 static int b44_set_pauseparam(struct net_device *dev,
1945                                 struct ethtool_pauseparam *epause)
1946 {
1947         struct b44 *bp = netdev_priv(dev);
1948
1949         spin_lock_irq(&bp->lock);
1950         if (epause->autoneg)
1951                 bp->flags |= B44_FLAG_PAUSE_AUTO;
1952         else
1953                 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
1954         if (epause->rx_pause)
1955                 bp->flags |= B44_FLAG_RX_PAUSE;
1956         else
1957                 bp->flags &= ~B44_FLAG_RX_PAUSE;
1958         if (epause->tx_pause)
1959                 bp->flags |= B44_FLAG_TX_PAUSE;
1960         else
1961                 bp->flags &= ~B44_FLAG_TX_PAUSE;
1962         if (bp->flags & B44_FLAG_PAUSE_AUTO) {
1963                 b44_halt(bp);
1964                 b44_init_rings(bp);
1965                 b44_init_hw(bp, B44_FULL_RESET);
1966         } else {
1967                 __b44_set_flow_ctrl(bp, bp->flags);
1968         }
1969         spin_unlock_irq(&bp->lock);
1970
1971         b44_enable_ints(bp);
1972
1973         return 0;
1974 }
1975
1976 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1977 {
1978         switch(stringset) {
1979         case ETH_SS_STATS:
1980                 memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
1981                 break;
1982         }
1983 }
1984
1985 static int b44_get_sset_count(struct net_device *dev, int sset)
1986 {
1987         switch (sset) {
1988         case ETH_SS_STATS:
1989                 return ARRAY_SIZE(b44_gstrings);
1990         default:
1991                 return -EOPNOTSUPP;
1992         }
1993 }
1994
1995 static void b44_get_ethtool_stats(struct net_device *dev,
1996                                   struct ethtool_stats *stats, u64 *data)
1997 {
1998         struct b44 *bp = netdev_priv(dev);
1999         u32 *val = &bp->hw_stats.tx_good_octets;
2000         u32 i;
2001
2002         spin_lock_irq(&bp->lock);
2003
2004         b44_stats_update(bp);
2005
2006         for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
2007                 *data++ = *val++;
2008
2009         spin_unlock_irq(&bp->lock);
2010 }
2011
2012 static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2013 {
2014         struct b44 *bp = netdev_priv(dev);
2015
2016         wol->supported = WAKE_MAGIC;
2017         if (bp->flags & B44_FLAG_WOL_ENABLE)
2018                 wol->wolopts = WAKE_MAGIC;
2019         else
2020                 wol->wolopts = 0;
2021         memset(&wol->sopass, 0, sizeof(wol->sopass));
2022 }
2023
2024 static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2025 {
2026         struct b44 *bp = netdev_priv(dev);
2027
2028         spin_lock_irq(&bp->lock);
2029         if (wol->wolopts & WAKE_MAGIC)
2030                 bp->flags |= B44_FLAG_WOL_ENABLE;
2031         else
2032                 bp->flags &= ~B44_FLAG_WOL_ENABLE;
2033         spin_unlock_irq(&bp->lock);
2034
2035         return 0;
2036 }
2037
2038 static const struct ethtool_ops b44_ethtool_ops = {
2039         .get_drvinfo            = b44_get_drvinfo,
2040         .get_settings           = b44_get_settings,
2041         .set_settings           = b44_set_settings,
2042         .nway_reset             = b44_nway_reset,
2043         .get_link               = ethtool_op_get_link,
2044         .get_wol                = b44_get_wol,
2045         .set_wol                = b44_set_wol,
2046         .get_ringparam          = b44_get_ringparam,
2047         .set_ringparam          = b44_set_ringparam,
2048         .get_pauseparam         = b44_get_pauseparam,
2049         .set_pauseparam         = b44_set_pauseparam,
2050         .get_msglevel           = b44_get_msglevel,
2051         .set_msglevel           = b44_set_msglevel,
2052         .get_strings            = b44_get_strings,
2053         .get_sset_count         = b44_get_sset_count,
2054         .get_ethtool_stats      = b44_get_ethtool_stats,
2055 };
2056
2057 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2058 {
2059         struct mii_ioctl_data *data = if_mii(ifr);
2060         struct b44 *bp = netdev_priv(dev);
2061         int err = -EINVAL;
2062
2063         if (!netif_running(dev))
2064                 goto out;
2065
2066         spin_lock_irq(&bp->lock);
2067         err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
2068         spin_unlock_irq(&bp->lock);
2069 out:
2070         return err;
2071 }
2072
2073 static int __devinit b44_get_invariants(struct b44 *bp)
2074 {
2075         struct ssb_device *sdev = bp->sdev;
2076         int err = 0;
2077         u8 *addr;
2078
2079         bp->dma_offset = ssb_dma_translation(sdev);
2080
2081         if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
2082             instance > 1) {
2083                 addr = sdev->bus->sprom.et1mac;
2084                 bp->phy_addr = sdev->bus->sprom.et1phyaddr;
2085         } else {
2086                 addr = sdev->bus->sprom.et0mac;
2087                 bp->phy_addr = sdev->bus->sprom.et0phyaddr;
2088         }
2089         /* Some ROMs have buggy PHY addresses with the high
2090          * bits set (sign extension?). Truncate them to a
2091          * valid PHY address. */
2092         bp->phy_addr &= 0x1F;
2093
2094         memcpy(bp->dev->dev_addr, addr, 6);
2095
2096         if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
2097                 printk(KERN_ERR PFX "Invalid MAC address found in EEPROM\n");
2098                 return -EINVAL;
2099         }
2100
2101         memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
2102
2103         bp->imask = IMASK_DEF;
2104
2105         /* XXX - really required?
2106            bp->flags |= B44_FLAG_BUGGY_TXPTR;
2107         */
2108
2109         if (bp->sdev->id.revision >= 7)
2110                 bp->flags |= B44_FLAG_B0_ANDLATER;
2111
2112         return err;
2113 }
2114
2115 static const struct net_device_ops b44_netdev_ops = {
2116         .ndo_open               = b44_open,
2117         .ndo_stop               = b44_close,
2118         .ndo_start_xmit         = b44_start_xmit,
2119         .ndo_get_stats          = b44_get_stats,
2120         .ndo_set_multicast_list = b44_set_rx_mode,
2121         .ndo_set_mac_address    = b44_set_mac_addr,
2122         .ndo_validate_addr      = eth_validate_addr,
2123         .ndo_do_ioctl           = b44_ioctl,
2124         .ndo_tx_timeout         = b44_tx_timeout,
2125         .ndo_change_mtu         = b44_change_mtu,
2126 #ifdef CONFIG_NET_POLL_CONTROLLER
2127         .ndo_poll_controller    = b44_poll_controller,
2128 #endif
2129 };
2130
2131 static int __devinit b44_init_one(struct ssb_device *sdev,
2132                                   const struct ssb_device_id *ent)
2133 {
2134         static int b44_version_printed = 0;
2135         struct net_device *dev;
2136         struct b44 *bp;
2137         int err;
2138
2139         instance++;
2140
2141         if (b44_version_printed++ == 0)
2142                 printk(KERN_INFO "%s", version);
2143
2144
2145         dev = alloc_etherdev(sizeof(*bp));
2146         if (!dev) {
2147                 dev_err(sdev->dev, "Etherdev alloc failed, aborting.\n");
2148                 err = -ENOMEM;
2149                 goto out;
2150         }
2151
2152         SET_NETDEV_DEV(dev, sdev->dev);
2153
2154         /* No interesting netdevice features in this card... */
2155         dev->features |= 0;
2156
2157         bp = netdev_priv(dev);
2158         bp->sdev = sdev;
2159         bp->dev = dev;
2160         bp->force_copybreak = 0;
2161
2162         bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
2163
2164         spin_lock_init(&bp->lock);
2165
2166         bp->rx_pending = B44_DEF_RX_RING_PENDING;
2167         bp->tx_pending = B44_DEF_TX_RING_PENDING;
2168
2169         dev->netdev_ops = &b44_netdev_ops;
2170         netif_napi_add(dev, &bp->napi, b44_poll, 64);
2171         dev->watchdog_timeo = B44_TX_TIMEOUT;
2172         dev->irq = sdev->irq;
2173         SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
2174
2175         netif_carrier_off(dev);
2176
2177         err = ssb_bus_powerup(sdev->bus, 0);
2178         if (err) {
2179                 dev_err(sdev->dev,
2180                         "Failed to powerup the bus\n");
2181                 goto err_out_free_dev;
2182         }
2183         err = ssb_dma_set_mask(sdev, DMA_30BIT_MASK);
2184         if (err) {
2185                 dev_err(sdev->dev,
2186                         "Required 30BIT DMA mask unsupported by the system.\n");
2187                 goto err_out_powerdown;
2188         }
2189         err = b44_get_invariants(bp);
2190         if (err) {
2191                 dev_err(sdev->dev,
2192                         "Problem fetching invariants of chip, aborting.\n");
2193                 goto err_out_powerdown;
2194         }
2195
2196         bp->mii_if.dev = dev;
2197         bp->mii_if.mdio_read = b44_mii_read;
2198         bp->mii_if.mdio_write = b44_mii_write;
2199         bp->mii_if.phy_id = bp->phy_addr;
2200         bp->mii_if.phy_id_mask = 0x1f;
2201         bp->mii_if.reg_num_mask = 0x1f;
2202
2203         /* By default, advertise all speed/duplex settings. */
2204         bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2205                       B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2206
2207         /* By default, auto-negotiate PAUSE. */
2208         bp->flags |= B44_FLAG_PAUSE_AUTO;
2209
2210         err = register_netdev(dev);
2211         if (err) {
2212                 dev_err(sdev->dev, "Cannot register net device, aborting.\n");
2213                 goto err_out_powerdown;
2214         }
2215
2216         ssb_set_drvdata(sdev, dev);
2217
2218         /* Chip reset provides power to the b44 MAC & PCI cores, which
2219          * is necessary for MAC register access.
2220          */
2221         b44_chip_reset(bp, B44_CHIP_RESET_FULL);
2222
2223         printk(KERN_INFO "%s: Broadcom 44xx/47xx 10/100BaseT Ethernet %pM\n",
2224                dev->name, dev->dev_addr);
2225
2226         return 0;
2227
2228 err_out_powerdown:
2229         ssb_bus_may_powerdown(sdev->bus);
2230
2231 err_out_free_dev:
2232         free_netdev(dev);
2233
2234 out:
2235         return err;
2236 }
2237
2238 static void __devexit b44_remove_one(struct ssb_device *sdev)
2239 {
2240         struct net_device *dev = ssb_get_drvdata(sdev);
2241
2242         unregister_netdev(dev);
2243         ssb_device_disable(sdev, 0);
2244         ssb_bus_may_powerdown(sdev->bus);
2245         free_netdev(dev);
2246         ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2247         ssb_set_drvdata(sdev, NULL);
2248 }
2249
2250 static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
2251 {
2252         struct net_device *dev = ssb_get_drvdata(sdev);
2253         struct b44 *bp = netdev_priv(dev);
2254
2255         if (!netif_running(dev))
2256                 return 0;
2257
2258         del_timer_sync(&bp->timer);
2259
2260         spin_lock_irq(&bp->lock);
2261
2262         b44_halt(bp);
2263         netif_carrier_off(bp->dev);
2264         netif_device_detach(bp->dev);
2265         b44_free_rings(bp);
2266
2267         spin_unlock_irq(&bp->lock);
2268
2269         free_irq(dev->irq, dev);
2270         if (bp->flags & B44_FLAG_WOL_ENABLE) {
2271                 b44_init_hw(bp, B44_PARTIAL_RESET);
2272                 b44_setup_wol(bp);
2273         }
2274
2275         ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2276         return 0;
2277 }
2278
2279 static int b44_resume(struct ssb_device *sdev)
2280 {
2281         struct net_device *dev = ssb_get_drvdata(sdev);
2282         struct b44 *bp = netdev_priv(dev);
2283         int rc = 0;
2284
2285         rc = ssb_bus_powerup(sdev->bus, 0);
2286         if (rc) {
2287                 dev_err(sdev->dev,
2288                         "Failed to powerup the bus\n");
2289                 return rc;
2290         }
2291
2292         if (!netif_running(dev))
2293                 return 0;
2294
2295         rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
2296         if (rc) {
2297                 printk(KERN_ERR PFX "%s: request_irq failed\n", dev->name);
2298                 return rc;
2299         }
2300
2301         spin_lock_irq(&bp->lock);
2302
2303         b44_init_rings(bp);
2304         b44_init_hw(bp, B44_FULL_RESET);
2305         netif_device_attach(bp->dev);
2306         spin_unlock_irq(&bp->lock);
2307
2308         b44_enable_ints(bp);
2309         netif_wake_queue(dev);
2310
2311         mod_timer(&bp->timer, jiffies + 1);
2312
2313         return 0;
2314 }
2315
2316 static struct ssb_driver b44_ssb_driver = {
2317         .name           = DRV_MODULE_NAME,
2318         .id_table       = b44_ssb_tbl,
2319         .probe          = b44_init_one,
2320         .remove         = __devexit_p(b44_remove_one),
2321         .suspend        = b44_suspend,
2322         .resume         = b44_resume,
2323 };
2324
2325 static inline int b44_pci_init(void)
2326 {
2327         int err = 0;
2328 #ifdef CONFIG_B44_PCI
2329         err = ssb_pcihost_register(&b44_pci_driver);
2330 #endif
2331         return err;
2332 }
2333
2334 static inline void b44_pci_exit(void)
2335 {
2336 #ifdef CONFIG_B44_PCI
2337         ssb_pcihost_unregister(&b44_pci_driver);
2338 #endif
2339 }
2340
2341 static int __init b44_init(void)
2342 {
2343         unsigned int dma_desc_align_size = dma_get_cache_alignment();
2344         int err;
2345
2346         /* Setup paramaters for syncing RX/TX DMA descriptors */
2347         dma_desc_align_mask = ~(dma_desc_align_size - 1);
2348         dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2349
2350         err = b44_pci_init();
2351         if (err)
2352                 return err;
2353         err = ssb_driver_register(&b44_ssb_driver);
2354         if (err)
2355                 b44_pci_exit();
2356         return err;
2357 }
2358
2359 static void __exit b44_cleanup(void)
2360 {
2361         ssb_driver_unregister(&b44_ssb_driver);
2362         b44_pci_exit();
2363 }
2364
2365 module_init(b44_init);
2366 module_exit(b44_cleanup);
2367