Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6
[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_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                         len++;
1509                         set_bit(len, (unsigned long *) pmask);
1510                 }
1511         }
1512         return len - 1;
1513 }
1514
1515 /* Setup magic packet patterns in the b44 WOL
1516  * pattern matching filter.
1517  */
1518 static void b44_setup_pseudo_magicp(struct b44 *bp)
1519 {
1520
1521         u32 val;
1522         int plen0, plen1, plen2;
1523         u8 *pwol_pattern;
1524         u8 pwol_mask[B44_PMASK_SIZE];
1525
1526         pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
1527         if (!pwol_pattern) {
1528                 printk(KERN_ERR PFX "Memory not available for WOL\n");
1529                 return;
1530         }
1531
1532         /* Ipv4 magic packet pattern - pattern 0.*/
1533         memset(pwol_mask, 0, B44_PMASK_SIZE);
1534         plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1535                                   B44_ETHIPV4UDP_HLEN);
1536
1537         bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
1538         bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
1539
1540         /* Raw ethernet II magic packet pattern - pattern 1 */
1541         memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1542         memset(pwol_mask, 0, B44_PMASK_SIZE);
1543         plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1544                                   ETH_HLEN);
1545
1546         bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1547                        B44_PATTERN_BASE + B44_PATTERN_SIZE);
1548         bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1549                        B44_PMASK_BASE + B44_PMASK_SIZE);
1550
1551         /* Ipv6 magic packet pattern - pattern 2 */
1552         memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1553         memset(pwol_mask, 0, B44_PMASK_SIZE);
1554         plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1555                                   B44_ETHIPV6UDP_HLEN);
1556
1557         bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1558                        B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
1559         bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1560                        B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
1561
1562         kfree(pwol_pattern);
1563
1564         /* set these pattern's lengths: one less than each real length */
1565         val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
1566         bw32(bp, B44_WKUP_LEN, val);
1567
1568         /* enable wakeup pattern matching */
1569         val = br32(bp, B44_DEVCTRL);
1570         bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
1571
1572 }
1573
1574 #ifdef CONFIG_B44_PCI
1575 static void b44_setup_wol_pci(struct b44 *bp)
1576 {
1577         u16 val;
1578
1579         if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
1580                 bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
1581                 pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
1582                 pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
1583         }
1584 }
1585 #else
1586 static inline void b44_setup_wol_pci(struct b44 *bp) { }
1587 #endif /* CONFIG_B44_PCI */
1588
1589 static void b44_setup_wol(struct b44 *bp)
1590 {
1591         u32 val;
1592
1593         bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
1594
1595         if (bp->flags & B44_FLAG_B0_ANDLATER) {
1596
1597                 bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
1598
1599                 val = bp->dev->dev_addr[2] << 24 |
1600                         bp->dev->dev_addr[3] << 16 |
1601                         bp->dev->dev_addr[4] << 8 |
1602                         bp->dev->dev_addr[5];
1603                 bw32(bp, B44_ADDR_LO, val);
1604
1605                 val = bp->dev->dev_addr[0] << 8 |
1606                         bp->dev->dev_addr[1];
1607                 bw32(bp, B44_ADDR_HI, val);
1608
1609                 val = br32(bp, B44_DEVCTRL);
1610                 bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
1611
1612         } else {
1613                 b44_setup_pseudo_magicp(bp);
1614         }
1615         b44_setup_wol_pci(bp);
1616 }
1617
1618 static int b44_close(struct net_device *dev)
1619 {
1620         struct b44 *bp = netdev_priv(dev);
1621
1622         netif_stop_queue(dev);
1623
1624         napi_disable(&bp->napi);
1625
1626         del_timer_sync(&bp->timer);
1627
1628         spin_lock_irq(&bp->lock);
1629
1630         b44_halt(bp);
1631         b44_free_rings(bp);
1632         netif_carrier_off(dev);
1633
1634         spin_unlock_irq(&bp->lock);
1635
1636         free_irq(dev->irq, dev);
1637
1638         if (bp->flags & B44_FLAG_WOL_ENABLE) {
1639                 b44_init_hw(bp, B44_PARTIAL_RESET);
1640                 b44_setup_wol(bp);
1641         }
1642
1643         b44_free_consistent(bp);
1644
1645         return 0;
1646 }
1647
1648 static struct net_device_stats *b44_get_stats(struct net_device *dev)
1649 {
1650         struct b44 *bp = netdev_priv(dev);
1651         struct net_device_stats *nstat = &dev->stats;
1652         struct b44_hw_stats *hwstat = &bp->hw_stats;
1653
1654         /* Convert HW stats into netdevice stats. */
1655         nstat->rx_packets = hwstat->rx_pkts;
1656         nstat->tx_packets = hwstat->tx_pkts;
1657         nstat->rx_bytes   = hwstat->rx_octets;
1658         nstat->tx_bytes   = hwstat->tx_octets;
1659         nstat->tx_errors  = (hwstat->tx_jabber_pkts +
1660                              hwstat->tx_oversize_pkts +
1661                              hwstat->tx_underruns +
1662                              hwstat->tx_excessive_cols +
1663                              hwstat->tx_late_cols);
1664         nstat->multicast  = hwstat->tx_multicast_pkts;
1665         nstat->collisions = hwstat->tx_total_cols;
1666
1667         nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1668                                    hwstat->rx_undersize);
1669         nstat->rx_over_errors   = hwstat->rx_missed_pkts;
1670         nstat->rx_frame_errors  = hwstat->rx_align_errs;
1671         nstat->rx_crc_errors    = hwstat->rx_crc_errs;
1672         nstat->rx_errors        = (hwstat->rx_jabber_pkts +
1673                                    hwstat->rx_oversize_pkts +
1674                                    hwstat->rx_missed_pkts +
1675                                    hwstat->rx_crc_align_errs +
1676                                    hwstat->rx_undersize +
1677                                    hwstat->rx_crc_errs +
1678                                    hwstat->rx_align_errs +
1679                                    hwstat->rx_symbol_errs);
1680
1681         nstat->tx_aborted_errors = hwstat->tx_underruns;
1682 #if 0
1683         /* Carrier lost counter seems to be broken for some devices */
1684         nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1685 #endif
1686
1687         return nstat;
1688 }
1689
1690 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1691 {
1692         struct dev_mc_list *mclist;
1693         int i, num_ents;
1694
1695         num_ents = min_t(int, dev->mc_count, B44_MCAST_TABLE_SIZE);
1696         mclist = dev->mc_list;
1697         for (i = 0; mclist && i < num_ents; i++, mclist = mclist->next) {
1698                 __b44_cam_write(bp, mclist->dmi_addr, i + 1);
1699         }
1700         return i+1;
1701 }
1702
1703 static void __b44_set_rx_mode(struct net_device *dev)
1704 {
1705         struct b44 *bp = netdev_priv(dev);
1706         u32 val;
1707
1708         val = br32(bp, B44_RXCONFIG);
1709         val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1710         if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
1711                 val |= RXCONFIG_PROMISC;
1712                 bw32(bp, B44_RXCONFIG, val);
1713         } else {
1714                 unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
1715                 int i = 1;
1716
1717                 __b44_set_mac_addr(bp);
1718
1719                 if ((dev->flags & IFF_ALLMULTI) ||
1720                     (dev->mc_count > B44_MCAST_TABLE_SIZE))
1721                         val |= RXCONFIG_ALLMULTI;
1722                 else
1723                         i = __b44_load_mcast(bp, dev);
1724
1725                 for (; i < 64; i++)
1726                         __b44_cam_write(bp, zero, i);
1727
1728                 bw32(bp, B44_RXCONFIG, val);
1729                 val = br32(bp, B44_CAM_CTRL);
1730                 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1731         }
1732 }
1733
1734 static void b44_set_rx_mode(struct net_device *dev)
1735 {
1736         struct b44 *bp = netdev_priv(dev);
1737
1738         spin_lock_irq(&bp->lock);
1739         __b44_set_rx_mode(dev);
1740         spin_unlock_irq(&bp->lock);
1741 }
1742
1743 static u32 b44_get_msglevel(struct net_device *dev)
1744 {
1745         struct b44 *bp = netdev_priv(dev);
1746         return bp->msg_enable;
1747 }
1748
1749 static void b44_set_msglevel(struct net_device *dev, u32 value)
1750 {
1751         struct b44 *bp = netdev_priv(dev);
1752         bp->msg_enable = value;
1753 }
1754
1755 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1756 {
1757         struct b44 *bp = netdev_priv(dev);
1758         struct ssb_bus *bus = bp->sdev->bus;
1759
1760         strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
1761         strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
1762         switch (bus->bustype) {
1763         case SSB_BUSTYPE_PCI:
1764                 strlcpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
1765                 break;
1766         case SSB_BUSTYPE_SSB:
1767                 strlcpy(info->bus_info, "SSB", sizeof(info->bus_info));
1768                 break;
1769         case SSB_BUSTYPE_PCMCIA:
1770         case SSB_BUSTYPE_SDIO:
1771                 WARN_ON(1); /* A device with this bus does not exist. */
1772                 break;
1773         }
1774 }
1775
1776 static int b44_nway_reset(struct net_device *dev)
1777 {
1778         struct b44 *bp = netdev_priv(dev);
1779         u32 bmcr;
1780         int r;
1781
1782         spin_lock_irq(&bp->lock);
1783         b44_readphy(bp, MII_BMCR, &bmcr);
1784         b44_readphy(bp, MII_BMCR, &bmcr);
1785         r = -EINVAL;
1786         if (bmcr & BMCR_ANENABLE) {
1787                 b44_writephy(bp, MII_BMCR,
1788                              bmcr | BMCR_ANRESTART);
1789                 r = 0;
1790         }
1791         spin_unlock_irq(&bp->lock);
1792
1793         return r;
1794 }
1795
1796 static int b44_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1797 {
1798         struct b44 *bp = netdev_priv(dev);
1799
1800         cmd->supported = (SUPPORTED_Autoneg);
1801         cmd->supported |= (SUPPORTED_100baseT_Half |
1802                           SUPPORTED_100baseT_Full |
1803                           SUPPORTED_10baseT_Half |
1804                           SUPPORTED_10baseT_Full |
1805                           SUPPORTED_MII);
1806
1807         cmd->advertising = 0;
1808         if (bp->flags & B44_FLAG_ADV_10HALF)
1809                 cmd->advertising |= ADVERTISED_10baseT_Half;
1810         if (bp->flags & B44_FLAG_ADV_10FULL)
1811                 cmd->advertising |= ADVERTISED_10baseT_Full;
1812         if (bp->flags & B44_FLAG_ADV_100HALF)
1813                 cmd->advertising |= ADVERTISED_100baseT_Half;
1814         if (bp->flags & B44_FLAG_ADV_100FULL)
1815                 cmd->advertising |= ADVERTISED_100baseT_Full;
1816         cmd->advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1817         cmd->speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1818                 SPEED_100 : SPEED_10;
1819         cmd->duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1820                 DUPLEX_FULL : DUPLEX_HALF;
1821         cmd->port = 0;
1822         cmd->phy_address = bp->phy_addr;
1823         cmd->transceiver = (bp->flags & B44_FLAG_INTERNAL_PHY) ?
1824                 XCVR_INTERNAL : XCVR_EXTERNAL;
1825         cmd->autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1826                 AUTONEG_DISABLE : AUTONEG_ENABLE;
1827         if (cmd->autoneg == AUTONEG_ENABLE)
1828                 cmd->advertising |= ADVERTISED_Autoneg;
1829         if (!netif_running(dev)){
1830                 cmd->speed = 0;
1831                 cmd->duplex = 0xff;
1832         }
1833         cmd->maxtxpkt = 0;
1834         cmd->maxrxpkt = 0;
1835         return 0;
1836 }
1837
1838 static int b44_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1839 {
1840         struct b44 *bp = netdev_priv(dev);
1841
1842         /* We do not support gigabit. */
1843         if (cmd->autoneg == AUTONEG_ENABLE) {
1844                 if (cmd->advertising &
1845                     (ADVERTISED_1000baseT_Half |
1846                      ADVERTISED_1000baseT_Full))
1847                         return -EINVAL;
1848         } else if ((cmd->speed != SPEED_100 &&
1849                     cmd->speed != SPEED_10) ||
1850                    (cmd->duplex != DUPLEX_HALF &&
1851                     cmd->duplex != DUPLEX_FULL)) {
1852                         return -EINVAL;
1853         }
1854
1855         spin_lock_irq(&bp->lock);
1856
1857         if (cmd->autoneg == AUTONEG_ENABLE) {
1858                 bp->flags &= ~(B44_FLAG_FORCE_LINK |
1859                                B44_FLAG_100_BASE_T |
1860                                B44_FLAG_FULL_DUPLEX |
1861                                B44_FLAG_ADV_10HALF |
1862                                B44_FLAG_ADV_10FULL |
1863                                B44_FLAG_ADV_100HALF |
1864                                B44_FLAG_ADV_100FULL);
1865                 if (cmd->advertising == 0) {
1866                         bp->flags |= (B44_FLAG_ADV_10HALF |
1867                                       B44_FLAG_ADV_10FULL |
1868                                       B44_FLAG_ADV_100HALF |
1869                                       B44_FLAG_ADV_100FULL);
1870                 } else {
1871                         if (cmd->advertising & ADVERTISED_10baseT_Half)
1872                                 bp->flags |= B44_FLAG_ADV_10HALF;
1873                         if (cmd->advertising & ADVERTISED_10baseT_Full)
1874                                 bp->flags |= B44_FLAG_ADV_10FULL;
1875                         if (cmd->advertising & ADVERTISED_100baseT_Half)
1876                                 bp->flags |= B44_FLAG_ADV_100HALF;
1877                         if (cmd->advertising & ADVERTISED_100baseT_Full)
1878                                 bp->flags |= B44_FLAG_ADV_100FULL;
1879                 }
1880         } else {
1881                 bp->flags |= B44_FLAG_FORCE_LINK;
1882                 bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
1883                 if (cmd->speed == SPEED_100)
1884                         bp->flags |= B44_FLAG_100_BASE_T;
1885                 if (cmd->duplex == DUPLEX_FULL)
1886                         bp->flags |= B44_FLAG_FULL_DUPLEX;
1887         }
1888
1889         if (netif_running(dev))
1890                 b44_setup_phy(bp);
1891
1892         spin_unlock_irq(&bp->lock);
1893
1894         return 0;
1895 }
1896
1897 static void b44_get_ringparam(struct net_device *dev,
1898                               struct ethtool_ringparam *ering)
1899 {
1900         struct b44 *bp = netdev_priv(dev);
1901
1902         ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1903         ering->rx_pending = bp->rx_pending;
1904
1905         /* XXX ethtool lacks a tx_max_pending, oops... */
1906 }
1907
1908 static int b44_set_ringparam(struct net_device *dev,
1909                              struct ethtool_ringparam *ering)
1910 {
1911         struct b44 *bp = netdev_priv(dev);
1912
1913         if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1914             (ering->rx_mini_pending != 0) ||
1915             (ering->rx_jumbo_pending != 0) ||
1916             (ering->tx_pending > B44_TX_RING_SIZE - 1))
1917                 return -EINVAL;
1918
1919         spin_lock_irq(&bp->lock);
1920
1921         bp->rx_pending = ering->rx_pending;
1922         bp->tx_pending = ering->tx_pending;
1923
1924         b44_halt(bp);
1925         b44_init_rings(bp);
1926         b44_init_hw(bp, B44_FULL_RESET);
1927         netif_wake_queue(bp->dev);
1928         spin_unlock_irq(&bp->lock);
1929
1930         b44_enable_ints(bp);
1931
1932         return 0;
1933 }
1934
1935 static void b44_get_pauseparam(struct net_device *dev,
1936                                 struct ethtool_pauseparam *epause)
1937 {
1938         struct b44 *bp = netdev_priv(dev);
1939
1940         epause->autoneg =
1941                 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1942         epause->rx_pause =
1943                 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
1944         epause->tx_pause =
1945                 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
1946 }
1947
1948 static int b44_set_pauseparam(struct net_device *dev,
1949                                 struct ethtool_pauseparam *epause)
1950 {
1951         struct b44 *bp = netdev_priv(dev);
1952
1953         spin_lock_irq(&bp->lock);
1954         if (epause->autoneg)
1955                 bp->flags |= B44_FLAG_PAUSE_AUTO;
1956         else
1957                 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
1958         if (epause->rx_pause)
1959                 bp->flags |= B44_FLAG_RX_PAUSE;
1960         else
1961                 bp->flags &= ~B44_FLAG_RX_PAUSE;
1962         if (epause->tx_pause)
1963                 bp->flags |= B44_FLAG_TX_PAUSE;
1964         else
1965                 bp->flags &= ~B44_FLAG_TX_PAUSE;
1966         if (bp->flags & B44_FLAG_PAUSE_AUTO) {
1967                 b44_halt(bp);
1968                 b44_init_rings(bp);
1969                 b44_init_hw(bp, B44_FULL_RESET);
1970         } else {
1971                 __b44_set_flow_ctrl(bp, bp->flags);
1972         }
1973         spin_unlock_irq(&bp->lock);
1974
1975         b44_enable_ints(bp);
1976
1977         return 0;
1978 }
1979
1980 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1981 {
1982         switch(stringset) {
1983         case ETH_SS_STATS:
1984                 memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
1985                 break;
1986         }
1987 }
1988
1989 static int b44_get_sset_count(struct net_device *dev, int sset)
1990 {
1991         switch (sset) {
1992         case ETH_SS_STATS:
1993                 return ARRAY_SIZE(b44_gstrings);
1994         default:
1995                 return -EOPNOTSUPP;
1996         }
1997 }
1998
1999 static void b44_get_ethtool_stats(struct net_device *dev,
2000                                   struct ethtool_stats *stats, u64 *data)
2001 {
2002         struct b44 *bp = netdev_priv(dev);
2003         u32 *val = &bp->hw_stats.tx_good_octets;
2004         u32 i;
2005
2006         spin_lock_irq(&bp->lock);
2007
2008         b44_stats_update(bp);
2009
2010         for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
2011                 *data++ = *val++;
2012
2013         spin_unlock_irq(&bp->lock);
2014 }
2015
2016 static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2017 {
2018         struct b44 *bp = netdev_priv(dev);
2019
2020         wol->supported = WAKE_MAGIC;
2021         if (bp->flags & B44_FLAG_WOL_ENABLE)
2022                 wol->wolopts = WAKE_MAGIC;
2023         else
2024                 wol->wolopts = 0;
2025         memset(&wol->sopass, 0, sizeof(wol->sopass));
2026 }
2027
2028 static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2029 {
2030         struct b44 *bp = netdev_priv(dev);
2031
2032         spin_lock_irq(&bp->lock);
2033         if (wol->wolopts & WAKE_MAGIC)
2034                 bp->flags |= B44_FLAG_WOL_ENABLE;
2035         else
2036                 bp->flags &= ~B44_FLAG_WOL_ENABLE;
2037         spin_unlock_irq(&bp->lock);
2038
2039         return 0;
2040 }
2041
2042 static const struct ethtool_ops b44_ethtool_ops = {
2043         .get_drvinfo            = b44_get_drvinfo,
2044         .get_settings           = b44_get_settings,
2045         .set_settings           = b44_set_settings,
2046         .nway_reset             = b44_nway_reset,
2047         .get_link               = ethtool_op_get_link,
2048         .get_wol                = b44_get_wol,
2049         .set_wol                = b44_set_wol,
2050         .get_ringparam          = b44_get_ringparam,
2051         .set_ringparam          = b44_set_ringparam,
2052         .get_pauseparam         = b44_get_pauseparam,
2053         .set_pauseparam         = b44_set_pauseparam,
2054         .get_msglevel           = b44_get_msglevel,
2055         .set_msglevel           = b44_set_msglevel,
2056         .get_strings            = b44_get_strings,
2057         .get_sset_count         = b44_get_sset_count,
2058         .get_ethtool_stats      = b44_get_ethtool_stats,
2059 };
2060
2061 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2062 {
2063         struct mii_ioctl_data *data = if_mii(ifr);
2064         struct b44 *bp = netdev_priv(dev);
2065         int err = -EINVAL;
2066
2067         if (!netif_running(dev))
2068                 goto out;
2069
2070         spin_lock_irq(&bp->lock);
2071         err = generic_mii_ioctl(&bp->mii_if, data, cmd, NULL);
2072         spin_unlock_irq(&bp->lock);
2073 out:
2074         return err;
2075 }
2076
2077 static int __devinit b44_get_invariants(struct b44 *bp)
2078 {
2079         struct ssb_device *sdev = bp->sdev;
2080         int err = 0;
2081         u8 *addr;
2082
2083         bp->dma_offset = ssb_dma_translation(sdev);
2084
2085         if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
2086             instance > 1) {
2087                 addr = sdev->bus->sprom.et1mac;
2088                 bp->phy_addr = sdev->bus->sprom.et1phyaddr;
2089         } else {
2090                 addr = sdev->bus->sprom.et0mac;
2091                 bp->phy_addr = sdev->bus->sprom.et0phyaddr;
2092         }
2093         /* Some ROMs have buggy PHY addresses with the high
2094          * bits set (sign extension?). Truncate them to a
2095          * valid PHY address. */
2096         bp->phy_addr &= 0x1F;
2097
2098         memcpy(bp->dev->dev_addr, addr, 6);
2099
2100         if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
2101                 printk(KERN_ERR PFX "Invalid MAC address found in EEPROM\n");
2102                 return -EINVAL;
2103         }
2104
2105         memcpy(bp->dev->perm_addr, bp->dev->dev_addr, bp->dev->addr_len);
2106
2107         bp->imask = IMASK_DEF;
2108
2109         /* XXX - really required?
2110            bp->flags |= B44_FLAG_BUGGY_TXPTR;
2111         */
2112
2113         if (bp->sdev->id.revision >= 7)
2114                 bp->flags |= B44_FLAG_B0_ANDLATER;
2115
2116         return err;
2117 }
2118
2119 static const struct net_device_ops b44_netdev_ops = {
2120         .ndo_open               = b44_open,
2121         .ndo_stop               = b44_close,
2122         .ndo_start_xmit         = b44_start_xmit,
2123         .ndo_get_stats          = b44_get_stats,
2124         .ndo_set_multicast_list = b44_set_rx_mode,
2125         .ndo_set_mac_address    = b44_set_mac_addr,
2126         .ndo_validate_addr      = eth_validate_addr,
2127         .ndo_do_ioctl           = b44_ioctl,
2128         .ndo_tx_timeout         = b44_tx_timeout,
2129         .ndo_change_mtu         = b44_change_mtu,
2130 #ifdef CONFIG_NET_POLL_CONTROLLER
2131         .ndo_poll_controller    = b44_poll_controller,
2132 #endif
2133 };
2134
2135 static int __devinit b44_init_one(struct ssb_device *sdev,
2136                                   const struct ssb_device_id *ent)
2137 {
2138         static int b44_version_printed = 0;
2139         struct net_device *dev;
2140         struct b44 *bp;
2141         int err;
2142
2143         instance++;
2144
2145         if (b44_version_printed++ == 0)
2146                 printk(KERN_INFO "%s", version);
2147
2148
2149         dev = alloc_etherdev(sizeof(*bp));
2150         if (!dev) {
2151                 dev_err(sdev->dev, "Etherdev alloc failed, aborting.\n");
2152                 err = -ENOMEM;
2153                 goto out;
2154         }
2155
2156         SET_NETDEV_DEV(dev, sdev->dev);
2157
2158         /* No interesting netdevice features in this card... */
2159         dev->features |= 0;
2160
2161         bp = netdev_priv(dev);
2162         bp->sdev = sdev;
2163         bp->dev = dev;
2164         bp->force_copybreak = 0;
2165
2166         bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
2167
2168         spin_lock_init(&bp->lock);
2169
2170         bp->rx_pending = B44_DEF_RX_RING_PENDING;
2171         bp->tx_pending = B44_DEF_TX_RING_PENDING;
2172
2173         dev->netdev_ops = &b44_netdev_ops;
2174         netif_napi_add(dev, &bp->napi, b44_poll, 64);
2175         dev->watchdog_timeo = B44_TX_TIMEOUT;
2176         dev->irq = sdev->irq;
2177         SET_ETHTOOL_OPS(dev, &b44_ethtool_ops);
2178
2179         netif_carrier_off(dev);
2180
2181         err = ssb_bus_powerup(sdev->bus, 0);
2182         if (err) {
2183                 dev_err(sdev->dev,
2184                         "Failed to powerup the bus\n");
2185                 goto err_out_free_dev;
2186         }
2187         err = ssb_dma_set_mask(sdev, DMA_BIT_MASK(30));
2188         if (err) {
2189                 dev_err(sdev->dev,
2190                         "Required 30BIT DMA mask unsupported by the system.\n");
2191                 goto err_out_powerdown;
2192         }
2193         err = b44_get_invariants(bp);
2194         if (err) {
2195                 dev_err(sdev->dev,
2196                         "Problem fetching invariants of chip, aborting.\n");
2197                 goto err_out_powerdown;
2198         }
2199
2200         bp->mii_if.dev = dev;
2201         bp->mii_if.mdio_read = b44_mii_read;
2202         bp->mii_if.mdio_write = b44_mii_write;
2203         bp->mii_if.phy_id = bp->phy_addr;
2204         bp->mii_if.phy_id_mask = 0x1f;
2205         bp->mii_if.reg_num_mask = 0x1f;
2206
2207         /* By default, advertise all speed/duplex settings. */
2208         bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2209                       B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2210
2211         /* By default, auto-negotiate PAUSE. */
2212         bp->flags |= B44_FLAG_PAUSE_AUTO;
2213
2214         err = register_netdev(dev);
2215         if (err) {
2216                 dev_err(sdev->dev, "Cannot register net device, aborting.\n");
2217                 goto err_out_powerdown;
2218         }
2219
2220         ssb_set_drvdata(sdev, dev);
2221
2222         /* Chip reset provides power to the b44 MAC & PCI cores, which
2223          * is necessary for MAC register access.
2224          */
2225         b44_chip_reset(bp, B44_CHIP_RESET_FULL);
2226
2227         printk(KERN_INFO "%s: Broadcom 44xx/47xx 10/100BaseT Ethernet %pM\n",
2228                dev->name, dev->dev_addr);
2229
2230         return 0;
2231
2232 err_out_powerdown:
2233         ssb_bus_may_powerdown(sdev->bus);
2234
2235 err_out_free_dev:
2236         free_netdev(dev);
2237
2238 out:
2239         return err;
2240 }
2241
2242 static void __devexit b44_remove_one(struct ssb_device *sdev)
2243 {
2244         struct net_device *dev = ssb_get_drvdata(sdev);
2245
2246         unregister_netdev(dev);
2247         ssb_device_disable(sdev, 0);
2248         ssb_bus_may_powerdown(sdev->bus);
2249         free_netdev(dev);
2250         ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2251         ssb_set_drvdata(sdev, NULL);
2252 }
2253
2254 static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
2255 {
2256         struct net_device *dev = ssb_get_drvdata(sdev);
2257         struct b44 *bp = netdev_priv(dev);
2258
2259         if (!netif_running(dev))
2260                 return 0;
2261
2262         del_timer_sync(&bp->timer);
2263
2264         spin_lock_irq(&bp->lock);
2265
2266         b44_halt(bp);
2267         netif_carrier_off(bp->dev);
2268         netif_device_detach(bp->dev);
2269         b44_free_rings(bp);
2270
2271         spin_unlock_irq(&bp->lock);
2272
2273         free_irq(dev->irq, dev);
2274         if (bp->flags & B44_FLAG_WOL_ENABLE) {
2275                 b44_init_hw(bp, B44_PARTIAL_RESET);
2276                 b44_setup_wol(bp);
2277         }
2278
2279         ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2280         return 0;
2281 }
2282
2283 static int b44_resume(struct ssb_device *sdev)
2284 {
2285         struct net_device *dev = ssb_get_drvdata(sdev);
2286         struct b44 *bp = netdev_priv(dev);
2287         int rc = 0;
2288
2289         rc = ssb_bus_powerup(sdev->bus, 0);
2290         if (rc) {
2291                 dev_err(sdev->dev,
2292                         "Failed to powerup the bus\n");
2293                 return rc;
2294         }
2295
2296         if (!netif_running(dev))
2297                 return 0;
2298
2299         rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
2300         if (rc) {
2301                 printk(KERN_ERR PFX "%s: request_irq failed\n", dev->name);
2302                 return rc;
2303         }
2304
2305         spin_lock_irq(&bp->lock);
2306
2307         b44_init_rings(bp);
2308         b44_init_hw(bp, B44_FULL_RESET);
2309         netif_device_attach(bp->dev);
2310         spin_unlock_irq(&bp->lock);
2311
2312         b44_enable_ints(bp);
2313         netif_wake_queue(dev);
2314
2315         mod_timer(&bp->timer, jiffies + 1);
2316
2317         return 0;
2318 }
2319
2320 static struct ssb_driver b44_ssb_driver = {
2321         .name           = DRV_MODULE_NAME,
2322         .id_table       = b44_ssb_tbl,
2323         .probe          = b44_init_one,
2324         .remove         = __devexit_p(b44_remove_one),
2325         .suspend        = b44_suspend,
2326         .resume         = b44_resume,
2327 };
2328
2329 static inline int b44_pci_init(void)
2330 {
2331         int err = 0;
2332 #ifdef CONFIG_B44_PCI
2333         err = ssb_pcihost_register(&b44_pci_driver);
2334 #endif
2335         return err;
2336 }
2337
2338 static inline void b44_pci_exit(void)
2339 {
2340 #ifdef CONFIG_B44_PCI
2341         ssb_pcihost_unregister(&b44_pci_driver);
2342 #endif
2343 }
2344
2345 static int __init b44_init(void)
2346 {
2347         unsigned int dma_desc_align_size = dma_get_cache_alignment();
2348         int err;
2349
2350         /* Setup paramaters for syncing RX/TX DMA descriptors */
2351         dma_desc_align_mask = ~(dma_desc_align_size - 1);
2352         dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2353
2354         err = b44_pci_init();
2355         if (err)
2356                 return err;
2357         err = ssb_driver_register(&b44_ssb_driver);
2358         if (err)
2359                 b44_pci_exit();
2360         return err;
2361 }
2362
2363 static void __exit b44_cleanup(void)
2364 {
2365         ssb_driver_unregister(&b44_ssb_driver);
2366         b44_pci_exit();
2367 }
2368
2369 module_init(b44_init);
2370 module_exit(b44_cleanup);
2371