net: use netdev_mc_count and netdev_mc_empty when appropriate
[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 DEFINE_PCI_DEVICE_TABLE(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_BIT_MASK(30)) {
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_BIT_MASK(30)) {
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, dest_map->mapping,
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->dev->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         unsigned long flags;
851
852         spin_lock_irqsave(&bp->lock, flags);
853
854         if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
855                 /* spin_lock(&bp->tx_lock); */
856                 b44_tx(bp);
857                 /* spin_unlock(&bp->tx_lock); */
858         }
859         spin_unlock_irqrestore(&bp->lock, flags);
860
861         work_done = 0;
862         if (bp->istat & ISTAT_RX)
863                 work_done += b44_rx(bp, budget);
864
865         if (bp->istat & ISTAT_ERRORS) {
866                 spin_lock_irqsave(&bp->lock, flags);
867                 b44_halt(bp);
868                 b44_init_rings(bp);
869                 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
870                 netif_wake_queue(bp->dev);
871                 spin_unlock_irqrestore(&bp->lock, flags);
872                 work_done = 0;
873         }
874
875         if (work_done < budget) {
876                 napi_complete(napi);
877                 b44_enable_ints(bp);
878         }
879
880         return work_done;
881 }
882
883 static irqreturn_t b44_interrupt(int irq, void *dev_id)
884 {
885         struct net_device *dev = dev_id;
886         struct b44 *bp = netdev_priv(dev);
887         u32 istat, imask;
888         int handled = 0;
889
890         spin_lock(&bp->lock);
891
892         istat = br32(bp, B44_ISTAT);
893         imask = br32(bp, B44_IMASK);
894
895         /* The interrupt mask register controls which interrupt bits
896          * will actually raise an interrupt to the CPU when set by hw/firmware,
897          * but doesn't mask off the bits.
898          */
899         istat &= imask;
900         if (istat) {
901                 handled = 1;
902
903                 if (unlikely(!netif_running(dev))) {
904                         printk(KERN_INFO "%s: late interrupt.\n", dev->name);
905                         goto irq_ack;
906                 }
907
908                 if (napi_schedule_prep(&bp->napi)) {
909                         /* NOTE: These writes are posted by the readback of
910                          *       the ISTAT register below.
911                          */
912                         bp->istat = istat;
913                         __b44_disable_ints(bp);
914                         __napi_schedule(&bp->napi);
915                 }
916
917 irq_ack:
918                 bw32(bp, B44_ISTAT, istat);
919                 br32(bp, B44_ISTAT);
920         }
921         spin_unlock(&bp->lock);
922         return IRQ_RETVAL(handled);
923 }
924
925 static void b44_tx_timeout(struct net_device *dev)
926 {
927         struct b44 *bp = netdev_priv(dev);
928
929         printk(KERN_ERR PFX "%s: transmit timed out, resetting\n",
930                dev->name);
931
932         spin_lock_irq(&bp->lock);
933
934         b44_halt(bp);
935         b44_init_rings(bp);
936         b44_init_hw(bp, B44_FULL_RESET);
937
938         spin_unlock_irq(&bp->lock);
939
940         b44_enable_ints(bp);
941
942         netif_wake_queue(dev);
943 }
944
945 static netdev_tx_t b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
946 {
947         struct b44 *bp = netdev_priv(dev);
948         int rc = NETDEV_TX_OK;
949         dma_addr_t mapping;
950         u32 len, entry, ctrl;
951         unsigned long flags;
952
953         len = skb->len;
954         spin_lock_irqsave(&bp->lock, flags);
955
956         /* This is a hard error, log it. */
957         if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
958                 netif_stop_queue(dev);
959                 printk(KERN_ERR PFX "%s: BUG! Tx Ring full when queue awake!\n",
960                        dev->name);
961                 goto err_out;
962         }
963
964         mapping = ssb_dma_map_single(bp->sdev, skb->data, len, DMA_TO_DEVICE);
965         if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
966                 struct sk_buff *bounce_skb;
967
968                 /* Chip can't handle DMA to/from >1GB, use bounce buffer */
969                 if (!ssb_dma_mapping_error(bp->sdev, mapping))
970                         ssb_dma_unmap_single(bp->sdev, mapping, len,
971                                              DMA_TO_DEVICE);
972
973                 bounce_skb = __netdev_alloc_skb(dev, len, GFP_ATOMIC | GFP_DMA);
974                 if (!bounce_skb)
975                         goto err_out;
976
977                 mapping = ssb_dma_map_single(bp->sdev, bounce_skb->data,
978                                              len, DMA_TO_DEVICE);
979                 if (ssb_dma_mapping_error(bp->sdev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
980                         if (!ssb_dma_mapping_error(bp->sdev, mapping))
981                                 ssb_dma_unmap_single(bp->sdev, mapping,
982                                                      len, DMA_TO_DEVICE);
983                         dev_kfree_skb_any(bounce_skb);
984                         goto err_out;
985                 }
986
987                 skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
988                 dev_kfree_skb_any(skb);
989                 skb = bounce_skb;
990         }
991
992         entry = bp->tx_prod;
993         bp->tx_buffers[entry].skb = skb;
994         bp->tx_buffers[entry].mapping = mapping;
995
996         ctrl  = (len & DESC_CTRL_LEN);
997         ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
998         if (entry == (B44_TX_RING_SIZE - 1))
999                 ctrl |= DESC_CTRL_EOT;
1000
1001         bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1002         bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1003
1004         if (bp->flags & B44_FLAG_TX_RING_HACK)
1005                 b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
1006                                             entry * sizeof(bp->tx_ring[0]),
1007                                             DMA_TO_DEVICE);
1008
1009         entry = NEXT_TX(entry);
1010
1011         bp->tx_prod = entry;
1012
1013         wmb();
1014
1015         bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1016         if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1017                 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1018         if (bp->flags & B44_FLAG_REORDER_BUG)
1019                 br32(bp, B44_DMATX_PTR);
1020
1021         if (TX_BUFFS_AVAIL(bp) < 1)
1022                 netif_stop_queue(dev);
1023
1024         dev->trans_start = jiffies;
1025
1026 out_unlock:
1027         spin_unlock_irqrestore(&bp->lock, flags);
1028
1029         return rc;
1030
1031 err_out:
1032         rc = NETDEV_TX_BUSY;
1033         goto out_unlock;
1034 }
1035
1036 static int b44_change_mtu(struct net_device *dev, int new_mtu)
1037 {
1038         struct b44 *bp = netdev_priv(dev);
1039
1040         if (new_mtu < B44_MIN_MTU || new_mtu > B44_MAX_MTU)
1041                 return -EINVAL;
1042
1043         if (!netif_running(dev)) {
1044                 /* We'll just catch it later when the
1045                  * device is up'd.
1046                  */
1047                 dev->mtu = new_mtu;
1048                 return 0;
1049         }
1050
1051         spin_lock_irq(&bp->lock);
1052         b44_halt(bp);
1053         dev->mtu = new_mtu;
1054         b44_init_rings(bp);
1055         b44_init_hw(bp, B44_FULL_RESET);
1056         spin_unlock_irq(&bp->lock);
1057
1058         b44_enable_ints(bp);
1059
1060         return 0;
1061 }
1062
1063 /* Free up pending packets in all rx/tx rings.
1064  *
1065  * The chip has been shut down and the driver detached from
1066  * the networking, so no interrupts or new tx packets will
1067  * end up in the driver.  bp->lock is not held and we are not
1068  * in an interrupt context and thus may sleep.
1069  */
1070 static void b44_free_rings(struct b44 *bp)
1071 {
1072         struct ring_info *rp;
1073         int i;
1074
1075         for (i = 0; i < B44_RX_RING_SIZE; i++) {
1076                 rp = &bp->rx_buffers[i];
1077
1078                 if (rp->skb == NULL)
1079                         continue;
1080                 ssb_dma_unmap_single(bp->sdev, rp->mapping, RX_PKT_BUF_SZ,
1081                                      DMA_FROM_DEVICE);
1082                 dev_kfree_skb_any(rp->skb);
1083                 rp->skb = NULL;
1084         }
1085
1086         /* XXX needs changes once NETIF_F_SG is set... */
1087         for (i = 0; i < B44_TX_RING_SIZE; i++) {
1088                 rp = &bp->tx_buffers[i];
1089
1090                 if (rp->skb == NULL)
1091                         continue;
1092                 ssb_dma_unmap_single(bp->sdev, rp->mapping, rp->skb->len,
1093                                      DMA_TO_DEVICE);
1094                 dev_kfree_skb_any(rp->skb);
1095                 rp->skb = NULL;
1096         }
1097 }
1098
1099 /* Initialize tx/rx rings for packet processing.
1100  *
1101  * The chip has been shut down and the driver detached from
1102  * the networking, so no interrupts or new tx packets will
1103  * end up in the driver.
1104  */
1105 static void b44_init_rings(struct b44 *bp)
1106 {
1107         int i;
1108
1109         b44_free_rings(bp);
1110
1111         memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1112         memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1113
1114         if (bp->flags & B44_FLAG_RX_RING_HACK)
1115                 ssb_dma_sync_single_for_device(bp->sdev, bp->rx_ring_dma,
1116                                                DMA_TABLE_BYTES,
1117                                                DMA_BIDIRECTIONAL);
1118
1119         if (bp->flags & B44_FLAG_TX_RING_HACK)
1120                 ssb_dma_sync_single_for_device(bp->sdev, bp->tx_ring_dma,
1121                                                DMA_TABLE_BYTES,
1122                                                DMA_TO_DEVICE);
1123
1124         for (i = 0; i < bp->rx_pending; i++) {
1125                 if (b44_alloc_rx_skb(bp, -1, i) < 0)
1126                         break;
1127         }
1128 }
1129
1130 /*
1131  * Must not be invoked with interrupt sources disabled and
1132  * the hardware shutdown down.
1133  */
1134 static void b44_free_consistent(struct b44 *bp)
1135 {
1136         kfree(bp->rx_buffers);
1137         bp->rx_buffers = NULL;
1138         kfree(bp->tx_buffers);
1139         bp->tx_buffers = NULL;
1140         if (bp->rx_ring) {
1141                 if (bp->flags & B44_FLAG_RX_RING_HACK) {
1142                         ssb_dma_unmap_single(bp->sdev, bp->rx_ring_dma,
1143                                              DMA_TABLE_BYTES,
1144                                              DMA_BIDIRECTIONAL);
1145                         kfree(bp->rx_ring);
1146                 } else
1147                         ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
1148                                                 bp->rx_ring, bp->rx_ring_dma,
1149                                                 GFP_KERNEL);
1150                 bp->rx_ring = NULL;
1151                 bp->flags &= ~B44_FLAG_RX_RING_HACK;
1152         }
1153         if (bp->tx_ring) {
1154                 if (bp->flags & B44_FLAG_TX_RING_HACK) {
1155                         ssb_dma_unmap_single(bp->sdev, bp->tx_ring_dma,
1156                                              DMA_TABLE_BYTES,
1157                                              DMA_TO_DEVICE);
1158                         kfree(bp->tx_ring);
1159                 } else
1160                         ssb_dma_free_consistent(bp->sdev, DMA_TABLE_BYTES,
1161                                                 bp->tx_ring, bp->tx_ring_dma,
1162                                                 GFP_KERNEL);
1163                 bp->tx_ring = NULL;
1164                 bp->flags &= ~B44_FLAG_TX_RING_HACK;
1165         }
1166 }
1167
1168 /*
1169  * Must not be invoked with interrupt sources disabled and
1170  * the hardware shutdown down.  Can sleep.
1171  */
1172 static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
1173 {
1174         int size;
1175
1176         size  = B44_RX_RING_SIZE * sizeof(struct ring_info);
1177         bp->rx_buffers = kzalloc(size, gfp);
1178         if (!bp->rx_buffers)
1179                 goto out_err;
1180
1181         size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1182         bp->tx_buffers = kzalloc(size, gfp);
1183         if (!bp->tx_buffers)
1184                 goto out_err;
1185
1186         size = DMA_TABLE_BYTES;
1187         bp->rx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->rx_ring_dma, gfp);
1188         if (!bp->rx_ring) {
1189                 /* Allocation may have failed due to pci_alloc_consistent
1190                    insisting on use of GFP_DMA, which is more restrictive
1191                    than necessary...  */
1192                 struct dma_desc *rx_ring;
1193                 dma_addr_t rx_ring_dma;
1194
1195                 rx_ring = kzalloc(size, gfp);
1196                 if (!rx_ring)
1197                         goto out_err;
1198
1199                 rx_ring_dma = ssb_dma_map_single(bp->sdev, rx_ring,
1200                                                  DMA_TABLE_BYTES,
1201                                                  DMA_BIDIRECTIONAL);
1202
1203                 if (ssb_dma_mapping_error(bp->sdev, rx_ring_dma) ||
1204                         rx_ring_dma + size > DMA_BIT_MASK(30)) {
1205                         kfree(rx_ring);
1206                         goto out_err;
1207                 }
1208
1209                 bp->rx_ring = rx_ring;
1210                 bp->rx_ring_dma = rx_ring_dma;
1211                 bp->flags |= B44_FLAG_RX_RING_HACK;
1212         }
1213
1214         bp->tx_ring = ssb_dma_alloc_consistent(bp->sdev, size, &bp->tx_ring_dma, gfp);
1215         if (!bp->tx_ring) {
1216                 /* Allocation may have failed due to ssb_dma_alloc_consistent
1217                    insisting on use of GFP_DMA, which is more restrictive
1218                    than necessary...  */
1219                 struct dma_desc *tx_ring;
1220                 dma_addr_t tx_ring_dma;
1221
1222                 tx_ring = kzalloc(size, gfp);
1223                 if (!tx_ring)
1224                         goto out_err;
1225
1226                 tx_ring_dma = ssb_dma_map_single(bp->sdev, tx_ring,
1227                                             DMA_TABLE_BYTES,
1228                                             DMA_TO_DEVICE);
1229
1230                 if (ssb_dma_mapping_error(bp->sdev, tx_ring_dma) ||
1231                         tx_ring_dma + size > DMA_BIT_MASK(30)) {
1232                         kfree(tx_ring);
1233                         goto out_err;
1234                 }
1235
1236                 bp->tx_ring = tx_ring;
1237                 bp->tx_ring_dma = tx_ring_dma;
1238                 bp->flags |= B44_FLAG_TX_RING_HACK;
1239         }
1240
1241         return 0;
1242
1243 out_err:
1244         b44_free_consistent(bp);
1245         return -ENOMEM;
1246 }
1247
1248 /* bp->lock is held. */
1249 static void b44_clear_stats(struct b44 *bp)
1250 {
1251         unsigned long reg;
1252
1253         bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1254         for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1255                 br32(bp, reg);
1256         for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1257                 br32(bp, reg);
1258 }
1259
1260 /* bp->lock is held. */
1261 static void b44_chip_reset(struct b44 *bp, int reset_kind)
1262 {
1263         struct ssb_device *sdev = bp->sdev;
1264         bool was_enabled;
1265
1266         was_enabled = ssb_device_is_enabled(bp->sdev);
1267
1268         ssb_device_enable(bp->sdev, 0);
1269         ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
1270
1271         if (was_enabled) {
1272                 bw32(bp, B44_RCV_LAZY, 0);
1273                 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1274                 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1);
1275                 bw32(bp, B44_DMATX_CTRL, 0);
1276                 bp->tx_prod = bp->tx_cons = 0;
1277                 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1278                         b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1279                                      100, 0);
1280                 }
1281                 bw32(bp, B44_DMARX_CTRL, 0);
1282                 bp->rx_prod = bp->rx_cons = 0;
1283         }
1284
1285         b44_clear_stats(bp);
1286
1287         /*
1288          * Don't enable PHY if we are doing a partial reset
1289          * we are probably going to power down
1290          */
1291         if (reset_kind == B44_CHIP_RESET_PARTIAL)
1292                 return;
1293
1294         switch (sdev->bus->bustype) {
1295         case SSB_BUSTYPE_SSB:
1296                 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1297                      (DIV_ROUND_CLOSEST(ssb_clockspeed(sdev->bus),
1298                                         B44_MDC_RATIO)
1299                      & MDIO_CTRL_MAXF_MASK)));
1300                 break;
1301         case SSB_BUSTYPE_PCI:
1302                 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1303                      (0x0d & MDIO_CTRL_MAXF_MASK)));
1304                 break;
1305         case SSB_BUSTYPE_PCMCIA:
1306         case SSB_BUSTYPE_SDIO:
1307                 WARN_ON(1); /* A device with this bus does not exist. */
1308                 break;
1309         }
1310
1311         br32(bp, B44_MDIO_CTRL);
1312
1313         if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1314                 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1315                 br32(bp, B44_ENET_CTRL);
1316                 bp->flags &= ~B44_FLAG_INTERNAL_PHY;
1317         } else {
1318                 u32 val = br32(bp, B44_DEVCTRL);
1319
1320                 if (val & DEVCTRL_EPR) {
1321                         bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1322                         br32(bp, B44_DEVCTRL);
1323                         udelay(100);
1324                 }
1325                 bp->flags |= B44_FLAG_INTERNAL_PHY;
1326         }
1327 }
1328
1329 /* bp->lock is held. */
1330 static void b44_halt(struct b44 *bp)
1331 {
1332         b44_disable_ints(bp);
1333         /* reset PHY */
1334         b44_phy_reset(bp);
1335         /* power down PHY */
1336         printk(KERN_INFO PFX "%s: powering down PHY\n", bp->dev->name);
1337         bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
1338         /* now reset the chip, but without enabling the MAC&PHY
1339          * part of it. This has to be done _after_ we shut down the PHY */
1340         b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1341 }
1342
1343 /* bp->lock is held. */
1344 static void __b44_set_mac_addr(struct b44 *bp)
1345 {
1346         bw32(bp, B44_CAM_CTRL, 0);
1347         if (!(bp->dev->flags & IFF_PROMISC)) {
1348                 u32 val;
1349
1350                 __b44_cam_write(bp, bp->dev->dev_addr, 0);
1351                 val = br32(bp, B44_CAM_CTRL);
1352                 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1353         }
1354 }
1355
1356 static int b44_set_mac_addr(struct net_device *dev, void *p)
1357 {
1358         struct b44 *bp = netdev_priv(dev);
1359         struct sockaddr *addr = p;
1360         u32 val;
1361
1362         if (netif_running(dev))
1363                 return -EBUSY;
1364
1365         if (!is_valid_ether_addr(addr->sa_data))
1366                 return -EINVAL;
1367
1368         memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1369
1370         spin_lock_irq(&bp->lock);
1371
1372         val = br32(bp, B44_RXCONFIG);
1373         if (!(val & RXCONFIG_CAM_ABSENT))
1374                 __b44_set_mac_addr(bp);
1375
1376         spin_unlock_irq(&bp->lock);
1377
1378         return 0;
1379 }
1380
1381 /* Called at device open time to get the chip ready for
1382  * packet processing.  Invoked with bp->lock held.
1383  */
1384 static void __b44_set_rx_mode(struct net_device *);
1385 static void b44_init_hw(struct b44 *bp, int reset_kind)
1386 {
1387         u32 val;
1388
1389         b44_chip_reset(bp, B44_CHIP_RESET_FULL);
1390         if (reset_kind == B44_FULL_RESET) {
1391                 b44_phy_reset(bp);
1392                 b44_setup_phy(bp);
1393         }
1394
1395         /* Enable CRC32, set proper LED modes and power on PHY */
1396         bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
1397         bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
1398
1399         /* This sets the MAC address too.  */
1400         __b44_set_rx_mode(bp->dev);
1401
1402         /* MTU + eth header + possible VLAN tag + struct rx_header */
1403         bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1404         bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1405
1406         bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
1407         if (reset_kind == B44_PARTIAL_RESET) {
1408                 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1409                                       (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1410         } else {
1411                 bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
1412                 bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
1413                 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1414                                       (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1415                 bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
1416
1417                 bw32(bp, B44_DMARX_PTR, bp->rx_pending);
1418                 bp->rx_prod = bp->rx_pending;
1419
1420                 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1421         }
1422
1423         val = br32(bp, B44_ENET_CTRL);
1424         bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
1425 }
1426
1427 static int b44_open(struct net_device *dev)
1428 {
1429         struct b44 *bp = netdev_priv(dev);
1430         int err;
1431
1432         err = b44_alloc_consistent(bp, GFP_KERNEL);
1433         if (err)
1434                 goto out;
1435
1436         napi_enable(&bp->napi);
1437
1438         b44_init_rings(bp);
1439         b44_init_hw(bp, B44_FULL_RESET);
1440
1441         b44_check_phy(bp);
1442
1443         err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
1444         if (unlikely(err < 0)) {
1445                 napi_disable(&bp->napi);
1446                 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1447                 b44_free_rings(bp);
1448                 b44_free_consistent(bp);
1449                 goto out;
1450         }
1451
1452         init_timer(&bp->timer);
1453         bp->timer.expires = jiffies + HZ;
1454         bp->timer.data = (unsigned long) bp;
1455         bp->timer.function = b44_timer;
1456         add_timer(&bp->timer);
1457
1458         b44_enable_ints(bp);
1459         netif_start_queue(dev);
1460 out:
1461         return err;
1462 }
1463
1464 #ifdef CONFIG_NET_POLL_CONTROLLER
1465 /*
1466  * Polling receive - used by netconsole and other diagnostic tools
1467  * to allow network i/o with interrupts disabled.
1468  */
1469 static void b44_poll_controller(struct net_device *dev)
1470 {
1471         disable_irq(dev->irq);
1472         b44_interrupt(dev->irq, dev);
1473         enable_irq(dev->irq);
1474 }
1475 #endif
1476
1477 static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
1478 {
1479         u32 i;
1480         u32 *pattern = (u32 *) pp;
1481
1482         for (i = 0; i < bytes; i += sizeof(u32)) {
1483                 bw32(bp, B44_FILT_ADDR, table_offset + i);
1484                 bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
1485         }
1486 }
1487
1488 static int b44_magic_pattern(u8 *macaddr, u8 *ppattern, u8 *pmask, int offset)
1489 {
1490         int magicsync = 6;
1491         int k, j, len = offset;
1492         int ethaddr_bytes = ETH_ALEN;
1493
1494         memset(ppattern + offset, 0xff, magicsync);
1495         for (j = 0; j < magicsync; j++)
1496                 set_bit(len++, (unsigned long *) pmask);
1497
1498         for (j = 0; j < B44_MAX_PATTERNS; j++) {
1499                 if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
1500                         ethaddr_bytes = ETH_ALEN;
1501                 else
1502                         ethaddr_bytes = B44_PATTERN_SIZE - len;
1503                 if (ethaddr_bytes <=0)
1504                         break;
1505                 for (k = 0; k< ethaddr_bytes; k++) {
1506                         ppattern[offset + magicsync +
1507                                 (j * ETH_ALEN) + k] = macaddr[k];
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 = &dev->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, netdev_mc_count(dev), 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                     (netdev_mc_count(dev) > 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         strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
1760         strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
1761         switch (bus->bustype) {
1762         case SSB_BUSTYPE_PCI:
1763                 strlcpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
1764                 break;
1765         case SSB_BUSTYPE_SSB:
1766                 strlcpy(info->bus_info, "SSB", sizeof(info->bus_info));
1767                 break;
1768         case SSB_BUSTYPE_PCMCIA:
1769         case SSB_BUSTYPE_SDIO:
1770                 WARN_ON(1); /* A device with this bus does not exist. */
1771                 break;
1772         }
1773 }
1774
1775 static int b44_nway_reset(struct net_device *dev)
1776 {
1777         struct b44 *bp = netdev_priv(dev);
1778         u32 bmcr;
1779         int r;
1780
1781         spin_lock_irq(&bp->lock);
1782         b44_readphy(bp, MII_BMCR, &bmcr);
1783         b44_readphy(bp, MII_BMCR, &bmcr);
1784         r = -EINVAL;
1785         if (bmcr & BMCR_ANENABLE) {
1786                 b44_writephy(bp, MII_BMCR,
1787                              bmcr | BMCR_ANRESTART);
1788                 r = 0;
1789         }
1790         spin_unlock_irq(&bp->lock);
1791
1792         return r;
1793 }
1794
1795 static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1796 {
1797         struct b44 *bp = netdev_priv(dev);
1798
1799         cmd->supported = (SUPPORTED_Autoneg);
1800         cmd->supported |= (SUPPORTED_100baseT_Half |
1801                           SUPPORTED_100baseT_Full |
1802                           SUPPORTED_10baseT_Half |
1803                           SUPPORTED_10baseT_Full |
1804                           SUPPORTED_MII);
1805
1806         cmd->advertising = 0;
1807         if (bp->flags & B44_FLAG_ADV_10HALF)
1808                 cmd->advertising |= ADVERTISED_10baseT_Half;
1809         if (bp->flags & B44_FLAG_ADV_10FULL)
1810                 cmd->advertising |= ADVERTISED_10baseT_Full;
1811         if (bp->flags & B44_FLAG_ADV_100HALF)
1812                 cmd->advertising |= ADVERTISED_100baseT_Half;
1813         if (bp->flags & B44_FLAG_ADV_100FULL)
1814                 cmd->advertising |= ADVERTISED_100baseT_Full;
1815         cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1816         cmd->speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1817                 SPEED_100 : SPEED_10;
1818         cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1819                 DUPLEX_FULL : DUPLEX_HALF;
1820         cmd->port = 0;
1821         cmd->phy_address = bp->phy_addr;
1822         cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
1823                 XCVR_INTERNAL : XCVR_EXTERNAL;
1824         cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1825                 AUTONEG_DISABLE : AUTONEG_ENABLE;
1826         if (cmd->autoneg == AUTONEG_ENABLE)
1827                 cmd->advertising |= ADVERTISED_Autoneg;
1828         if (!netif_running(dev)){
1829                 cmd->speed = 0;
1830                 cmd->duplex = 0xff;
1831         }
1832         cmd->maxtxpkt = 0;
1833         cmd->maxrxpkt = 0;
1834         return 0;
1835 }
1836
1837 static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1838 {
1839         struct b44 *bp = netdev_priv(dev);
1840
1841         /* We do not support gigabit. */
1842         if (cmd->autoneg == AUTONEG_ENABLE) {
1843                 if (cmd->advertising &
1844                     (ADVERTISED_1000baseT_Half |
1845                      ADVERTISED_1000baseT_Full))
1846                         return -EINVAL;
1847         } else if ((cmd->speed != SPEED_100 &&
1848                     cmd->speed != SPEED_10) ||
1849                    (cmd->duplex != DUPLEX_HALF &&
1850                     cmd->duplex != DUPLEX_FULL)) {
1851                         return -EINVAL;
1852         }
1853
1854         spin_lock_irq(&bp->lock);
1855
1856         if (cmd->autoneg == AUTONEG_ENABLE) {
1857                 bp->flags &= ~(B44_FLAG_FORCE_LINK |
1858                                B44_FLAG_100_BASE_T |
1859                                B44_FLAG_FULL_DUPLEX |
1860                                B44_FLAG_ADV_10HALF |
1861                                B44_FLAG_ADV_10FULL |
1862                                B44_FLAG_ADV_100HALF |
1863                                B44_FLAG_ADV_100FULL);
1864                 if (cmd->advertising == 0) {
1865                         bp->flags |= (B44_FLAG_ADV_10HALF |
1866                                       B44_FLAG_ADV_10FULL |
1867                                       B44_FLAG_ADV_100HALF |
1868                                       B44_FLAG_ADV_100FULL);
1869                 } else {
1870                         if (cmd->advertising & ADVERTISED_10baseT_Half)
1871                                 bp->flags |= B44_FLAG_ADV_10HALF;
1872                         if (cmd->advertising & ADVERTISED_10baseT_Full)
1873                                 bp->flags |= B44_FLAG_ADV_10FULL;
1874                         if (cmd->advertising & ADVERTISED_100baseT_Half)
1875                                 bp->flags |= B44_FLAG_ADV_100HALF;
1876                         if (cmd->advertising & ADVERTISED_100baseT_Full)
1877                                 bp->flags |= B44_FLAG_ADV_100FULL;
1878                 }
1879         } else {
1880                 bp->flags |= B44_FLAG_FORCE_LINK;
1881                 bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
1882                 if (cmd->speed == SPEED_100)
1883                         bp->flags |= B44_FLAG_100_BASE_T;
1884                 if (cmd->duplex == DUPLEX_FULL)
1885                         bp->flags |= B44_FLAG_FULL_DUPLEX;
1886         }
1887
1888         if (netif_running(dev))
1889                 b44_setup_phy(bp);
1890
1891         spin_unlock_irq(&bp->lock);
1892
1893         return 0;
1894 }
1895
1896 static void b44_get_ringparam(struct net_device *dev,
1897                               struct ethtool_ringparam *ering)
1898 {
1899         struct b44 *bp = netdev_priv(dev);
1900
1901         ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1902         ering->rx_pending = bp->rx_pending;
1903
1904         /* XXX ethtool lacks a tx_max_pending, oops... */
1905 }
1906
1907 static int b44_set_ringparam(struct net_device *dev,
1908                              struct ethtool_ringparam *ering)
1909 {
1910         struct b44 *bp = netdev_priv(dev);
1911
1912         if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1913             (ering->rx_mini_pending != 0) ||
1914             (ering->rx_jumbo_pending != 0) ||
1915             (ering->tx_pending > B44_TX_RING_SIZE - 1))
1916                 return -EINVAL;
1917
1918         spin_lock_irq(&bp->lock);
1919
1920         bp->rx_pending = ering->rx_pending;
1921         bp->tx_pending = ering->tx_pending;
1922
1923         b44_halt(bp);
1924         b44_init_rings(bp);
1925         b44_init_hw(bp, B44_FULL_RESET);
1926         netif_wake_queue(bp->dev);
1927         spin_unlock_irq(&bp->lock);
1928
1929         b44_enable_ints(bp);
1930
1931         return 0;
1932 }
1933
1934 static void b44_get_pauseparam(struct net_device *dev,
1935                                 struct ethtool_pauseparam *epause)
1936 {
1937         struct b44 *bp = netdev_priv(dev);
1938
1939         epause->autoneg =
1940                 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1941         epause->rx_pause =
1942                 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
1943         epause->tx_pause =
1944                 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
1945 }
1946
1947 static int b44_set_pauseparam(struct net_device *dev,
1948                                 struct ethtool_pauseparam *epause)
1949 {
1950         struct b44 *bp = netdev_priv(dev);
1951
1952         spin_lock_irq(&bp->lock);
1953         if (epause->autoneg)
1954                 bp->flags |= B44_FLAG_PAUSE_AUTO;
1955         else
1956                 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
1957         if (epause->rx_pause)
1958                 bp->flags |= B44_FLAG_RX_PAUSE;
1959         else
1960                 bp->flags &= ~B44_FLAG_RX_PAUSE;
1961         if (epause->tx_pause)
1962                 bp->flags |= B44_FLAG_TX_PAUSE;
1963         else
1964                 bp->flags &= ~B44_FLAG_TX_PAUSE;
1965         if (bp->flags & B44_FLAG_PAUSE_AUTO) {
1966                 b44_halt(bp);
1967                 b44_init_rings(bp);
1968                 b44_init_hw(bp, B44_FULL_RESET);
1969         } else {
1970                 __b44_set_flow_ctrl(bp, bp->flags);
1971         }
1972         spin_unlock_irq(&bp->lock);
1973
1974         b44_enable_ints(bp);
1975
1976         return 0;
1977 }
1978
1979 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1980 {
1981         switch(stringset) {
1982         case ETH_SS_STATS:
1983                 memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
1984                 break;
1985         }
1986 }
1987
1988 static int b44_get_sset_count(struct net_device *dev, int sset)
1989 {
1990         switch (sset) {
1991         case ETH_SS_STATS:
1992                 return ARRAY_SIZE(b44_gstrings);
1993         default:
1994                 return -EOPNOTSUPP;
1995         }
1996 }
1997
1998 static void b44_get_ethtool_stats(struct net_device *dev,
1999                                   struct ethtool_stats *stats, u64 *data)
2000 {
2001         struct b44 *bp = netdev_priv(dev);
2002         u32 *val = &bp->hw_stats.tx_good_octets;
2003         u32 i;
2004
2005         spin_lock_irq(&bp->lock);
2006
2007         b44_stats_update(bp);
2008
2009         for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
2010                 *data++ = *val++;
2011
2012         spin_unlock_irq(&bp->lock);
2013 }
2014
2015 static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2016 {
2017         struct b44 *bp = netdev_priv(dev);
2018
2019         wol->supported = WAKE_MAGIC;
2020         if (bp->flags & B44_FLAG_WOL_ENABLE)
2021                 wol->wolopts = WAKE_MAGIC;
2022         else
2023                 wol->wolopts = 0;
2024         memset(&wol->sopass, 0, sizeof(wol->sopass));
2025 }
2026
2027 static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2028 {
2029         struct b44 *bp = netdev_priv(dev);
2030
2031         spin_lock_irq(&bp->lock);
2032         if (wol->wolopts & WAKE_MAGIC)
2033                 bp->flags |= B44_FLAG_WOL_ENABLE;
2034         else
2035                 bp->flags &= ~B44_FLAG_WOL_ENABLE;
2036         spin_unlock_irq(&bp->lock);
2037
2038         return 0;
2039 }
2040
2041 static const struct ethtool_ops b44_ethtool_ops = {
2042         .get_drvinfo            = b44_get_drvinfo,
2043         .get_settings           = b44_get_settings,
2044         .set_settings           = b44_set_settings,
2045         .nway_reset             = b44_nway_reset,
2046         .get_link               = ethtool_op_get_link,
2047         .get_wol                = b44_get_wol,
2048         .set_wol                = b44_set_wol,
2049         .get_ringparam          = b44_get_ringparam,
2050         .set_ringparam          = b44_set_ringparam,
2051         .get_pauseparam         = b44_get_pauseparam,
2052         .set_pauseparam         = b44_set_pauseparam,
2053         .get_msglevel           = b44_get_msglevel,
2054         .set_msglevel           = b44_set_msglevel,
2055         .get_strings            = b44_get_strings,
2056         .get_sset_count         = b44_get_sset_count,
2057         .get_ethtool_stats      = b44_get_ethtool_stats,
2058 };
2059
2060 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2061 {
2062         struct mii_ioctl_data *data = if_mii(ifr);
2063         struct b44 *bp = netdev_priv(dev);
2064         int err = -EINVAL;
2065
2066         if (!netif_running(dev))
2067                 goto out;
2068
2069         spin_lock_irq(&bp->lock);
2070         err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
2071         spin_unlock_irq(&bp->lock);
2072 out:
2073         return err;
2074 }
2075
2076 static int __devinit b44_get_invariants(struct b44 *bp)
2077 {
2078         struct ssb_device *sdev = bp->sdev;
2079         int err = 0;
2080         u8 *addr;
2081
2082         bp->dma_offset = ssb_dma_translation(sdev);
2083
2084         if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
2085             instance > 1) {
2086                 addr = sdev->bus->sprom.et1mac;
2087                 bp->phy_addr = sdev->bus->sprom.et1phyaddr;
2088         } else {
2089                 addr = sdev->bus->sprom.et0mac;
2090                 bp->phy_addr = sdev->bus->sprom.et0phyaddr;
2091         }
2092         /* Some ROMs have buggy PHY addresses with the high
2093          * bits set (sign extension?). Truncate them to a
2094          * valid PHY address. */
2095         bp->phy_addr &= 0x1F;
2096
2097         memcpy(bp->dev->dev_addr, addr, 6);
2098
2099         if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
2100                 printk(KERN_ERR PFX "Invalid MAC address found in EEPROM\n");
2101                 return -EINVAL;
2102         }
2103
2104         memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
2105
2106         bp->imask = IMASK_DEF;
2107
2108         /* XXX - really required?
2109            bp->flags |= B44_FLAG_BUGGY_TXPTR;
2110         */
2111
2112         if (bp->sdev->id.revision >= 7)
2113                 bp->flags |= B44_FLAG_B0_ANDLATER;
2114
2115         return err;
2116 }
2117
2118 static const struct net_device_ops b44_netdev_ops = {
2119         .ndo_open               = b44_open,
2120         .ndo_stop               = b44_close,
2121         .ndo_start_xmit         = b44_start_xmit,
2122         .ndo_get_stats          = b44_get_stats,
2123         .ndo_set_multicast_list = b44_set_rx_mode,
2124         .ndo_set_mac_address    = b44_set_mac_addr,
2125         .ndo_validate_addr      = eth_validate_addr,
2126         .ndo_do_ioctl           = b44_ioctl,
2127         .ndo_tx_timeout         = b44_tx_timeout,
2128         .ndo_change_mtu         = b44_change_mtu,
2129 #ifdef CONFIG_NET_POLL_CONTROLLER
2130         .ndo_poll_controller    = b44_poll_controller,
2131 #endif
2132 };
2133
2134 static int __devinit b44_init_one(struct ssb_device *sdev,
2135                                   const struct ssb_device_id *ent)
2136 {
2137         static int b44_version_printed = 0;
2138         struct net_device *dev;
2139         struct b44 *bp;
2140         int err;
2141
2142         instance++;
2143
2144         if (b44_version_printed++ == 0)
2145                 printk(KERN_INFO "%s", version);
2146
2147
2148         dev = alloc_etherdev(sizeof(*bp));
2149         if (!dev) {
2150                 dev_err(sdev->dev, "Etherdev alloc failed, aborting.\n");
2151                 err = -ENOMEM;
2152                 goto out;
2153         }
2154
2155         SET_NETDEV_DEV(dev, sdev->dev);
2156
2157         /* No interesting netdevice features in this card... */
2158         dev->features |= 0;
2159
2160         bp = netdev_priv(dev);
2161         bp->sdev = sdev;
2162         bp->dev = dev;
2163         bp->force_copybreak = 0;
2164
2165         bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
2166
2167         spin_lock_init(&bp->lock);
2168
2169         bp->rx_pending = B44_DEF_RX_RING_PENDING;
2170         bp->tx_pending = B44_DEF_TX_RING_PENDING;
2171
2172         dev->netdev_ops = &b44_netdev_ops;
2173         netif_napi_add(dev, &bp->napi, b44_poll, 64);
2174         dev->watchdog_timeo = B44_TX_TIMEOUT;
2175         dev->irq = sdev->irq;
2176         SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
2177
2178         netif_carrier_off(dev);
2179
2180         err = ssb_bus_powerup(sdev->bus, 0);
2181         if (err) {
2182                 dev_err(sdev->dev,
2183                         "Failed to powerup the bus\n");
2184                 goto err_out_free_dev;
2185         }
2186         err = ssb_dma_set_mask(sdev, DMA_BIT_MASK(30));
2187         if (err) {
2188                 dev_err(sdev->dev,
2189                         "Required 30BIT DMA mask unsupported by the system.\n");
2190                 goto err_out_powerdown;
2191         }
2192         err = b44_get_invariants(bp);
2193         if (err) {
2194                 dev_err(sdev->dev,
2195                         "Problem fetching invariants of chip, aborting.\n");
2196                 goto err_out_powerdown;
2197         }
2198
2199         bp->mii_if.dev = dev;
2200         bp->mii_if.mdio_read = b44_mii_read;
2201         bp->mii_if.mdio_write = b44_mii_write;
2202         bp->mii_if.phy_id = bp->phy_addr;
2203         bp->mii_if.phy_id_mask = 0x1f;
2204         bp->mii_if.reg_num_mask = 0x1f;
2205
2206         /* By default, advertise all speed/duplex settings. */
2207         bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2208                       B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2209
2210         /* By default, auto-negotiate PAUSE. */
2211         bp->flags |= B44_FLAG_PAUSE_AUTO;
2212
2213         err = register_netdev(dev);
2214         if (err) {
2215                 dev_err(sdev->dev, "Cannot register net device, aborting.\n");
2216                 goto err_out_powerdown;
2217         }
2218
2219         ssb_set_drvdata(sdev, dev);
2220
2221         /* Chip reset provides power to the b44 MAC & PCI cores, which
2222          * is necessary for MAC register access.
2223          */
2224         b44_chip_reset(bp, B44_CHIP_RESET_FULL);
2225
2226         printk(KERN_INFO "%s: Broadcom 44xx/47xx 10/100BaseT Ethernet %pM\n",
2227                dev->name, dev->dev_addr);
2228
2229         return 0;
2230
2231 err_out_powerdown:
2232         ssb_bus_may_powerdown(sdev->bus);
2233
2234 err_out_free_dev:
2235         free_netdev(dev);
2236
2237 out:
2238         return err;
2239 }
2240
2241 static void __devexit b44_remove_one(struct ssb_device *sdev)
2242 {
2243         struct net_device *dev = ssb_get_drvdata(sdev);
2244
2245         unregister_netdev(dev);
2246         ssb_device_disable(sdev, 0);
2247         ssb_bus_may_powerdown(sdev->bus);
2248         free_netdev(dev);
2249         ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2250         ssb_set_drvdata(sdev, NULL);
2251 }
2252
2253 static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
2254 {
2255         struct net_device *dev = ssb_get_drvdata(sdev);
2256         struct b44 *bp = netdev_priv(dev);
2257
2258         if (!netif_running(dev))
2259                 return 0;
2260
2261         del_timer_sync(&bp->timer);
2262
2263         spin_lock_irq(&bp->lock);
2264
2265         b44_halt(bp);
2266         netif_carrier_off(bp->dev);
2267         netif_device_detach(bp->dev);
2268         b44_free_rings(bp);
2269
2270         spin_unlock_irq(&bp->lock);
2271
2272         free_irq(dev->irq, dev);
2273         if (bp->flags & B44_FLAG_WOL_ENABLE) {
2274                 b44_init_hw(bp, B44_PARTIAL_RESET);
2275                 b44_setup_wol(bp);
2276         }
2277
2278         ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2279         return 0;
2280 }
2281
2282 static int b44_resume(struct ssb_device *sdev)
2283 {
2284         struct net_device *dev = ssb_get_drvdata(sdev);
2285         struct b44 *bp = netdev_priv(dev);
2286         int rc = 0;
2287
2288         rc = ssb_bus_powerup(sdev->bus, 0);
2289         if (rc) {
2290                 dev_err(sdev->dev,
2291                         "Failed to powerup the bus\n");
2292                 return rc;
2293         }
2294
2295         if (!netif_running(dev))
2296                 return 0;
2297
2298         rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
2299         if (rc) {
2300                 printk(KERN_ERR PFX "%s: request_irq failed\n", dev->name);
2301                 return rc;
2302         }
2303
2304         spin_lock_irq(&bp->lock);
2305
2306         b44_init_rings(bp);
2307         b44_init_hw(bp, B44_FULL_RESET);
2308         netif_device_attach(bp->dev);
2309         spin_unlock_irq(&bp->lock);
2310
2311         b44_enable_ints(bp);
2312         netif_wake_queue(dev);
2313
2314         mod_timer(&bp->timer, jiffies + 1);
2315
2316         return 0;
2317 }
2318
2319 static struct ssb_driver b44_ssb_driver = {
2320         .name           = DRV_MODULE_NAME,
2321         .id_table       = b44_ssb_tbl,
2322         .probe          = b44_init_one,
2323         .remove         = __devexit_p(b44_remove_one),
2324         .suspend        = b44_suspend,
2325         .resume         = b44_resume,
2326 };
2327
2328 static inline int b44_pci_init(void)
2329 {
2330         int err = 0;
2331 #ifdef CONFIG_B44_PCI
2332         err = ssb_pcihost_register(&b44_pci_driver);
2333 #endif
2334         return err;
2335 }
2336
2337 static inline void b44_pci_exit(void)
2338 {
2339 #ifdef CONFIG_B44_PCI
2340         ssb_pcihost_unregister(&b44_pci_driver);
2341 #endif
2342 }
2343
2344 static int __init b44_init(void)
2345 {
2346         unsigned int dma_desc_align_size = dma_get_cache_alignment();
2347         int err;
2348
2349         /* Setup paramaters for syncing RX/TX DMA descriptors */
2350         dma_desc_align_mask = ~(dma_desc_align_size - 1);
2351         dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2352
2353         err = b44_pci_init();
2354         if (err)
2355                 return err;
2356         err = ssb_driver_register(&b44_ssb_driver);
2357         if (err)
2358                 b44_pci_exit();
2359         return err;
2360 }
2361
2362 static void __exit b44_cleanup(void)
2363 {
2364         ssb_driver_unregister(&b44_ssb_driver);
2365         b44_pci_exit();
2366 }
2367
2368 module_init(b44_init);
2369 module_exit(b44_cleanup);
2370