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Merge tag 'for-linus-20170825' of git://git.infradead.org/linux-mtd
[mirror_ubuntu-artful-kernel.git] / drivers / net / ethernet / broadcom / 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 <m@bues.ch>
9 * Copyright (C) 2013 Hauke Mehrtens <hauke@hauke-m.de>
10 *
11 * Distribute under GPL.
12 */
13
14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
15
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/moduleparam.h>
19 #include <linux/types.h>
20 #include <linux/netdevice.h>
21 #include <linux/ethtool.h>
22 #include <linux/mii.h>
23 #include <linux/if_ether.h>
24 #include <linux/if_vlan.h>
25 #include <linux/etherdevice.h>
26 #include <linux/pci.h>
27 #include <linux/delay.h>
28 #include <linux/init.h>
29 #include <linux/interrupt.h>
30 #include <linux/dma-mapping.h>
31 #include <linux/ssb/ssb.h>
32 #include <linux/slab.h>
33 #include <linux/phy.h>
34
35 #include <linux/uaccess.h>
36 #include <asm/io.h>
37 #include <asm/irq.h>
38
39
40 #include "b44.h"
41
42 #define DRV_MODULE_NAME "b44"
43 #define DRV_MODULE_VERSION "2.0"
44 #define DRV_DESCRIPTION "Broadcom 44xx/47xx 10/100 PCI ethernet driver"
45
46 #define B44_DEF_MSG_ENABLE \
47 (NETIF_MSG_DRV | \
48 NETIF_MSG_PROBE | \
49 NETIF_MSG_LINK | \
50 NETIF_MSG_TIMER | \
51 NETIF_MSG_IFDOWN | \
52 NETIF_MSG_IFUP | \
53 NETIF_MSG_RX_ERR | \
54 NETIF_MSG_TX_ERR)
55
56 /* length of time before we decide the hardware is borked,
57 * and dev->tx_timeout() should be called to fix the problem
58 */
59 #define B44_TX_TIMEOUT (5 * HZ)
60
61 /* hardware minimum and maximum for a single frame's data payload */
62 #define B44_MIN_MTU ETH_ZLEN
63 #define B44_MAX_MTU ETH_DATA_LEN
64
65 #define B44_RX_RING_SIZE 512
66 #define B44_DEF_RX_RING_PENDING 200
67 #define B44_RX_RING_BYTES (sizeof(struct dma_desc) * \
68 B44_RX_RING_SIZE)
69 #define B44_TX_RING_SIZE 512
70 #define B44_DEF_TX_RING_PENDING (B44_TX_RING_SIZE - 1)
71 #define B44_TX_RING_BYTES (sizeof(struct dma_desc) * \
72 B44_TX_RING_SIZE)
73
74 #define TX_RING_GAP(BP) \
75 (B44_TX_RING_SIZE - (BP)->tx_pending)
76 #define TX_BUFFS_AVAIL(BP) \
77 (((BP)->tx_cons <= (BP)->tx_prod) ? \
78 (BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod : \
79 (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP))
80 #define NEXT_TX(N) (((N) + 1) & (B44_TX_RING_SIZE - 1))
81
82 #define RX_PKT_OFFSET (RX_HEADER_LEN + 2)
83 #define RX_PKT_BUF_SZ (1536 + RX_PKT_OFFSET)
84
85 /* minimum number of free TX descriptors required to wake up TX process */
86 #define B44_TX_WAKEUP_THRESH (B44_TX_RING_SIZE / 4)
87
88 /* b44 internal pattern match filter info */
89 #define B44_PATTERN_BASE 0x400
90 #define B44_PATTERN_SIZE 0x80
91 #define B44_PMASK_BASE 0x600
92 #define B44_PMASK_SIZE 0x10
93 #define B44_MAX_PATTERNS 16
94 #define B44_ETHIPV6UDP_HLEN 62
95 #define B44_ETHIPV4UDP_HLEN 42
96
97 MODULE_AUTHOR("Felix Fietkau, Florian Schirmer, Pekka Pietikainen, David S. Miller");
98 MODULE_DESCRIPTION(DRV_DESCRIPTION);
99 MODULE_LICENSE("GPL");
100 MODULE_VERSION(DRV_MODULE_VERSION);
101
102 static int b44_debug = -1; /* -1 == use B44_DEF_MSG_ENABLE as value */
103 module_param(b44_debug, int, 0);
104 MODULE_PARM_DESC(b44_debug, "B44 bitmapped debugging message enable value");
105
106
107 #ifdef CONFIG_B44_PCI
108 static const struct pci_device_id b44_pci_tbl[] = {
109 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401) },
110 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0) },
111 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1) },
112 { 0 } /* terminate list with empty entry */
113 };
114 MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
115
116 static struct pci_driver b44_pci_driver = {
117 .name = DRV_MODULE_NAME,
118 .id_table = b44_pci_tbl,
119 };
120 #endif /* CONFIG_B44_PCI */
121
122 static const struct ssb_device_id b44_ssb_tbl[] = {
123 SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET, SSB_ANY_REV),
124 {},
125 };
126 MODULE_DEVICE_TABLE(ssb, b44_ssb_tbl);
127
128 static void b44_halt(struct b44 *);
129 static void b44_init_rings(struct b44 *);
130
131 #define B44_FULL_RESET 1
132 #define B44_FULL_RESET_SKIP_PHY 2
133 #define B44_PARTIAL_RESET 3
134 #define B44_CHIP_RESET_FULL 4
135 #define B44_CHIP_RESET_PARTIAL 5
136
137 static void b44_init_hw(struct b44 *, int);
138
139 static int dma_desc_sync_size;
140 static int instance;
141
142 static const char b44_gstrings[][ETH_GSTRING_LEN] = {
143 #define _B44(x...) # x,
144 B44_STAT_REG_DECLARE
145 #undef _B44
146 };
147
148 static inline void b44_sync_dma_desc_for_device(struct ssb_device *sdev,
149 dma_addr_t dma_base,
150 unsigned long offset,
151 enum dma_data_direction dir)
152 {
153 dma_sync_single_for_device(sdev->dma_dev, dma_base + offset,
154 dma_desc_sync_size, dir);
155 }
156
157 static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
158 dma_addr_t dma_base,
159 unsigned long offset,
160 enum dma_data_direction dir)
161 {
162 dma_sync_single_for_cpu(sdev->dma_dev, dma_base + offset,
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 if (net_ratelimit())
193 netdev_err(bp->dev, "BUG! Timeout waiting for bit %08x of register %lx to %s\n",
194 bit, reg, clear ? "clear" : "set");
195
196 return -ENODEV;
197 }
198 return 0;
199 }
200
201 static inline void __b44_cam_read(struct b44 *bp, unsigned char *data, int index)
202 {
203 u32 val;
204
205 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_READ |
206 (index << CAM_CTRL_INDEX_SHIFT)));
207
208 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
209
210 val = br32(bp, B44_CAM_DATA_LO);
211
212 data[2] = (val >> 24) & 0xFF;
213 data[3] = (val >> 16) & 0xFF;
214 data[4] = (val >> 8) & 0xFF;
215 data[5] = (val >> 0) & 0xFF;
216
217 val = br32(bp, B44_CAM_DATA_HI);
218
219 data[0] = (val >> 8) & 0xFF;
220 data[1] = (val >> 0) & 0xFF;
221 }
222
223 static inline void __b44_cam_write(struct b44 *bp, unsigned char *data, int index)
224 {
225 u32 val;
226
227 val = ((u32) data[2]) << 24;
228 val |= ((u32) data[3]) << 16;
229 val |= ((u32) data[4]) << 8;
230 val |= ((u32) data[5]) << 0;
231 bw32(bp, B44_CAM_DATA_LO, val);
232 val = (CAM_DATA_HI_VALID |
233 (((u32) data[0]) << 8) |
234 (((u32) data[1]) << 0));
235 bw32(bp, B44_CAM_DATA_HI, val);
236 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE |
237 (index << CAM_CTRL_INDEX_SHIFT)));
238 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
239 }
240
241 static inline void __b44_disable_ints(struct b44 *bp)
242 {
243 bw32(bp, B44_IMASK, 0);
244 }
245
246 static void b44_disable_ints(struct b44 *bp)
247 {
248 __b44_disable_ints(bp);
249
250 /* Flush posted writes. */
251 br32(bp, B44_IMASK);
252 }
253
254 static void b44_enable_ints(struct b44 *bp)
255 {
256 bw32(bp, B44_IMASK, bp->imask);
257 }
258
259 static int __b44_readphy(struct b44 *bp, int phy_addr, int reg, u32 *val)
260 {
261 int err;
262
263 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
264 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
265 (MDIO_OP_READ << MDIO_DATA_OP_SHIFT) |
266 (phy_addr << MDIO_DATA_PMD_SHIFT) |
267 (reg << MDIO_DATA_RA_SHIFT) |
268 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT)));
269 err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
270 *val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
271
272 return err;
273 }
274
275 static int __b44_writephy(struct b44 *bp, int phy_addr, int reg, u32 val)
276 {
277 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
278 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
279 (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) |
280 (phy_addr << MDIO_DATA_PMD_SHIFT) |
281 (reg << MDIO_DATA_RA_SHIFT) |
282 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) |
283 (val & MDIO_DATA_DATA)));
284 return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
285 }
286
287 static inline int b44_readphy(struct b44 *bp, int reg, u32 *val)
288 {
289 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
290 return 0;
291
292 return __b44_readphy(bp, bp->phy_addr, reg, val);
293 }
294
295 static inline int b44_writephy(struct b44 *bp, int reg, u32 val)
296 {
297 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
298 return 0;
299
300 return __b44_writephy(bp, bp->phy_addr, reg, val);
301 }
302
303 /* miilib interface */
304 static int b44_mdio_read_mii(struct net_device *dev, int phy_id, int location)
305 {
306 u32 val;
307 struct b44 *bp = netdev_priv(dev);
308 int rc = __b44_readphy(bp, phy_id, location, &val);
309 if (rc)
310 return 0xffffffff;
311 return val;
312 }
313
314 static void b44_mdio_write_mii(struct net_device *dev, int phy_id, int location,
315 int val)
316 {
317 struct b44 *bp = netdev_priv(dev);
318 __b44_writephy(bp, phy_id, location, val);
319 }
320
321 static int b44_mdio_read_phylib(struct mii_bus *bus, int phy_id, int location)
322 {
323 u32 val;
324 struct b44 *bp = bus->priv;
325 int rc = __b44_readphy(bp, phy_id, location, &val);
326 if (rc)
327 return 0xffffffff;
328 return val;
329 }
330
331 static int b44_mdio_write_phylib(struct mii_bus *bus, int phy_id, int location,
332 u16 val)
333 {
334 struct b44 *bp = bus->priv;
335 return __b44_writephy(bp, phy_id, location, val);
336 }
337
338 static int b44_phy_reset(struct b44 *bp)
339 {
340 u32 val;
341 int err;
342
343 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
344 return 0;
345 err = b44_writephy(bp, MII_BMCR, BMCR_RESET);
346 if (err)
347 return err;
348 udelay(100);
349 err = b44_readphy(bp, MII_BMCR, &val);
350 if (!err) {
351 if (val & BMCR_RESET) {
352 netdev_err(bp->dev, "PHY Reset would not complete\n");
353 err = -ENODEV;
354 }
355 }
356
357 return err;
358 }
359
360 static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags)
361 {
362 u32 val;
363
364 bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE);
365 bp->flags |= pause_flags;
366
367 val = br32(bp, B44_RXCONFIG);
368 if (pause_flags & B44_FLAG_RX_PAUSE)
369 val |= RXCONFIG_FLOW;
370 else
371 val &= ~RXCONFIG_FLOW;
372 bw32(bp, B44_RXCONFIG, val);
373
374 val = br32(bp, B44_MAC_FLOW);
375 if (pause_flags & B44_FLAG_TX_PAUSE)
376 val |= (MAC_FLOW_PAUSE_ENAB |
377 (0xc0 & MAC_FLOW_RX_HI_WATER));
378 else
379 val &= ~MAC_FLOW_PAUSE_ENAB;
380 bw32(bp, B44_MAC_FLOW, val);
381 }
382
383 static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote)
384 {
385 u32 pause_enab = 0;
386
387 /* The driver supports only rx pause by default because
388 the b44 mac tx pause mechanism generates excessive
389 pause frames.
390 Use ethtool to turn on b44 tx pause if necessary.
391 */
392 if ((local & ADVERTISE_PAUSE_CAP) &&
393 (local & ADVERTISE_PAUSE_ASYM)){
394 if ((remote & LPA_PAUSE_ASYM) &&
395 !(remote & LPA_PAUSE_CAP))
396 pause_enab |= B44_FLAG_RX_PAUSE;
397 }
398
399 __b44_set_flow_ctrl(bp, pause_enab);
400 }
401
402 #ifdef CONFIG_BCM47XX
403 #include <linux/bcm47xx_nvram.h>
404 static void b44_wap54g10_workaround(struct b44 *bp)
405 {
406 char buf[20];
407 u32 val;
408 int err;
409
410 /*
411 * workaround for bad hardware design in Linksys WAP54G v1.0
412 * see https://dev.openwrt.org/ticket/146
413 * check and reset bit "isolate"
414 */
415 if (bcm47xx_nvram_getenv("boardnum", buf, sizeof(buf)) < 0)
416 return;
417 if (simple_strtoul(buf, NULL, 0) == 2) {
418 err = __b44_readphy(bp, 0, MII_BMCR, &val);
419 if (err)
420 goto error;
421 if (!(val & BMCR_ISOLATE))
422 return;
423 val &= ~BMCR_ISOLATE;
424 err = __b44_writephy(bp, 0, MII_BMCR, val);
425 if (err)
426 goto error;
427 }
428 return;
429 error:
430 pr_warn("PHY: cannot reset MII transceiver isolate bit\n");
431 }
432 #else
433 static inline void b44_wap54g10_workaround(struct b44 *bp)
434 {
435 }
436 #endif
437
438 static int b44_setup_phy(struct b44 *bp)
439 {
440 u32 val;
441 int err;
442
443 b44_wap54g10_workaround(bp);
444
445 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
446 return 0;
447 if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0)
448 goto out;
449 if ((err = b44_writephy(bp, B44_MII_ALEDCTRL,
450 val & MII_ALEDCTRL_ALLMSK)) != 0)
451 goto out;
452 if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0)
453 goto out;
454 if ((err = b44_writephy(bp, B44_MII_TLEDCTRL,
455 val | MII_TLEDCTRL_ENABLE)) != 0)
456 goto out;
457
458 if (!(bp->flags & B44_FLAG_FORCE_LINK)) {
459 u32 adv = ADVERTISE_CSMA;
460
461 if (bp->flags & B44_FLAG_ADV_10HALF)
462 adv |= ADVERTISE_10HALF;
463 if (bp->flags & B44_FLAG_ADV_10FULL)
464 adv |= ADVERTISE_10FULL;
465 if (bp->flags & B44_FLAG_ADV_100HALF)
466 adv |= ADVERTISE_100HALF;
467 if (bp->flags & B44_FLAG_ADV_100FULL)
468 adv |= ADVERTISE_100FULL;
469
470 if (bp->flags & B44_FLAG_PAUSE_AUTO)
471 adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
472
473 if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0)
474 goto out;
475 if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE |
476 BMCR_ANRESTART))) != 0)
477 goto out;
478 } else {
479 u32 bmcr;
480
481 if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0)
482 goto out;
483 bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100);
484 if (bp->flags & B44_FLAG_100_BASE_T)
485 bmcr |= BMCR_SPEED100;
486 if (bp->flags & B44_FLAG_FULL_DUPLEX)
487 bmcr |= BMCR_FULLDPLX;
488 if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0)
489 goto out;
490
491 /* Since we will not be negotiating there is no safe way
492 * to determine if the link partner supports flow control
493 * or not. So just disable it completely in this case.
494 */
495 b44_set_flow_ctrl(bp, 0, 0);
496 }
497
498 out:
499 return err;
500 }
501
502 static void b44_stats_update(struct b44 *bp)
503 {
504 unsigned long reg;
505 u64 *val;
506
507 val = &bp->hw_stats.tx_good_octets;
508 u64_stats_update_begin(&bp->hw_stats.syncp);
509
510 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) {
511 *val++ += br32(bp, reg);
512 }
513
514 /* Pad */
515 reg += 8*4UL;
516
517 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) {
518 *val++ += br32(bp, reg);
519 }
520
521 u64_stats_update_end(&bp->hw_stats.syncp);
522 }
523
524 static void b44_link_report(struct b44 *bp)
525 {
526 if (!netif_carrier_ok(bp->dev)) {
527 netdev_info(bp->dev, "Link is down\n");
528 } else {
529 netdev_info(bp->dev, "Link is up at %d Mbps, %s duplex\n",
530 (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
531 (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
532
533 netdev_info(bp->dev, "Flow control is %s for TX and %s for RX\n",
534 (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off",
535 (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off");
536 }
537 }
538
539 static void b44_check_phy(struct b44 *bp)
540 {
541 u32 bmsr, aux;
542
543 if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
544 bp->flags |= B44_FLAG_100_BASE_T;
545 if (!netif_carrier_ok(bp->dev)) {
546 u32 val = br32(bp, B44_TX_CTRL);
547 if (bp->flags & B44_FLAG_FULL_DUPLEX)
548 val |= TX_CTRL_DUPLEX;
549 else
550 val &= ~TX_CTRL_DUPLEX;
551 bw32(bp, B44_TX_CTRL, val);
552 netif_carrier_on(bp->dev);
553 b44_link_report(bp);
554 }
555 return;
556 }
557
558 if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
559 !b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
560 (bmsr != 0xffff)) {
561 if (aux & MII_AUXCTRL_SPEED)
562 bp->flags |= B44_FLAG_100_BASE_T;
563 else
564 bp->flags &= ~B44_FLAG_100_BASE_T;
565 if (aux & MII_AUXCTRL_DUPLEX)
566 bp->flags |= B44_FLAG_FULL_DUPLEX;
567 else
568 bp->flags &= ~B44_FLAG_FULL_DUPLEX;
569
570 if (!netif_carrier_ok(bp->dev) &&
571 (bmsr & BMSR_LSTATUS)) {
572 u32 val = br32(bp, B44_TX_CTRL);
573 u32 local_adv, remote_adv;
574
575 if (bp->flags & B44_FLAG_FULL_DUPLEX)
576 val |= TX_CTRL_DUPLEX;
577 else
578 val &= ~TX_CTRL_DUPLEX;
579 bw32(bp, B44_TX_CTRL, val);
580
581 if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
582 !b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
583 !b44_readphy(bp, MII_LPA, &remote_adv))
584 b44_set_flow_ctrl(bp, local_adv, remote_adv);
585
586 /* Link now up */
587 netif_carrier_on(bp->dev);
588 b44_link_report(bp);
589 } else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
590 /* Link now down */
591 netif_carrier_off(bp->dev);
592 b44_link_report(bp);
593 }
594
595 if (bmsr & BMSR_RFAULT)
596 netdev_warn(bp->dev, "Remote fault detected in PHY\n");
597 if (bmsr & BMSR_JCD)
598 netdev_warn(bp->dev, "Jabber detected in PHY\n");
599 }
600 }
601
602 static void b44_timer(unsigned long __opaque)
603 {
604 struct b44 *bp = (struct b44 *) __opaque;
605
606 spin_lock_irq(&bp->lock);
607
608 b44_check_phy(bp);
609
610 b44_stats_update(bp);
611
612 spin_unlock_irq(&bp->lock);
613
614 mod_timer(&bp->timer, round_jiffies(jiffies + HZ));
615 }
616
617 static void b44_tx(struct b44 *bp)
618 {
619 u32 cur, cons;
620 unsigned bytes_compl = 0, pkts_compl = 0;
621
622 cur = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
623 cur /= sizeof(struct dma_desc);
624
625 /* XXX needs updating when NETIF_F_SG is supported */
626 for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) {
627 struct ring_info *rp = &bp->tx_buffers[cons];
628 struct sk_buff *skb = rp->skb;
629
630 BUG_ON(skb == NULL);
631
632 dma_unmap_single(bp->sdev->dma_dev,
633 rp->mapping,
634 skb->len,
635 DMA_TO_DEVICE);
636 rp->skb = NULL;
637
638 bytes_compl += skb->len;
639 pkts_compl++;
640
641 dev_kfree_skb_irq(skb);
642 }
643
644 netdev_completed_queue(bp->dev, pkts_compl, bytes_compl);
645 bp->tx_cons = cons;
646 if (netif_queue_stopped(bp->dev) &&
647 TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
648 netif_wake_queue(bp->dev);
649
650 bw32(bp, B44_GPTIMER, 0);
651 }
652
653 /* Works like this. This chip writes a 'struct rx_header" 30 bytes
654 * before the DMA address you give it. So we allocate 30 more bytes
655 * for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then
656 * point the chip at 30 bytes past where the rx_header will go.
657 */
658 static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
659 {
660 struct dma_desc *dp;
661 struct ring_info *src_map, *map;
662 struct rx_header *rh;
663 struct sk_buff *skb;
664 dma_addr_t mapping;
665 int dest_idx;
666 u32 ctrl;
667
668 src_map = NULL;
669 if (src_idx >= 0)
670 src_map = &bp->rx_buffers[src_idx];
671 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
672 map = &bp->rx_buffers[dest_idx];
673 skb = netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ);
674 if (skb == NULL)
675 return -ENOMEM;
676
677 mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
678 RX_PKT_BUF_SZ,
679 DMA_FROM_DEVICE);
680
681 /* Hardware bug work-around, the chip is unable to do PCI DMA
682 to/from anything above 1GB :-( */
683 if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
684 mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
685 /* Sigh... */
686 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
687 dma_unmap_single(bp->sdev->dma_dev, mapping,
688 RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
689 dev_kfree_skb_any(skb);
690 skb = alloc_skb(RX_PKT_BUF_SZ, GFP_ATOMIC | GFP_DMA);
691 if (skb == NULL)
692 return -ENOMEM;
693 mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
694 RX_PKT_BUF_SZ,
695 DMA_FROM_DEVICE);
696 if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
697 mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
698 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
699 dma_unmap_single(bp->sdev->dma_dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
700 dev_kfree_skb_any(skb);
701 return -ENOMEM;
702 }
703 bp->force_copybreak = 1;
704 }
705
706 rh = (struct rx_header *) skb->data;
707
708 rh->len = 0;
709 rh->flags = 0;
710
711 map->skb = skb;
712 map->mapping = mapping;
713
714 if (src_map != NULL)
715 src_map->skb = NULL;
716
717 ctrl = (DESC_CTRL_LEN & RX_PKT_BUF_SZ);
718 if (dest_idx == (B44_RX_RING_SIZE - 1))
719 ctrl |= DESC_CTRL_EOT;
720
721 dp = &bp->rx_ring[dest_idx];
722 dp->ctrl = cpu_to_le32(ctrl);
723 dp->addr = cpu_to_le32((u32) mapping + bp->dma_offset);
724
725 if (bp->flags & B44_FLAG_RX_RING_HACK)
726 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
727 dest_idx * sizeof(*dp),
728 DMA_BIDIRECTIONAL);
729
730 return RX_PKT_BUF_SZ;
731 }
732
733 static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
734 {
735 struct dma_desc *src_desc, *dest_desc;
736 struct ring_info *src_map, *dest_map;
737 struct rx_header *rh;
738 int dest_idx;
739 __le32 ctrl;
740
741 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
742 dest_desc = &bp->rx_ring[dest_idx];
743 dest_map = &bp->rx_buffers[dest_idx];
744 src_desc = &bp->rx_ring[src_idx];
745 src_map = &bp->rx_buffers[src_idx];
746
747 dest_map->skb = src_map->skb;
748 rh = (struct rx_header *) src_map->skb->data;
749 rh->len = 0;
750 rh->flags = 0;
751 dest_map->mapping = src_map->mapping;
752
753 if (bp->flags & B44_FLAG_RX_RING_HACK)
754 b44_sync_dma_desc_for_cpu(bp->sdev, bp->rx_ring_dma,
755 src_idx * sizeof(*src_desc),
756 DMA_BIDIRECTIONAL);
757
758 ctrl = src_desc->ctrl;
759 if (dest_idx == (B44_RX_RING_SIZE - 1))
760 ctrl |= cpu_to_le32(DESC_CTRL_EOT);
761 else
762 ctrl &= cpu_to_le32(~DESC_CTRL_EOT);
763
764 dest_desc->ctrl = ctrl;
765 dest_desc->addr = src_desc->addr;
766
767 src_map->skb = NULL;
768
769 if (bp->flags & B44_FLAG_RX_RING_HACK)
770 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
771 dest_idx * sizeof(*dest_desc),
772 DMA_BIDIRECTIONAL);
773
774 dma_sync_single_for_device(bp->sdev->dma_dev, dest_map->mapping,
775 RX_PKT_BUF_SZ,
776 DMA_FROM_DEVICE);
777 }
778
779 static int b44_rx(struct b44 *bp, int budget)
780 {
781 int received;
782 u32 cons, prod;
783
784 received = 0;
785 prod = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK;
786 prod /= sizeof(struct dma_desc);
787 cons = bp->rx_cons;
788
789 while (cons != prod && budget > 0) {
790 struct ring_info *rp = &bp->rx_buffers[cons];
791 struct sk_buff *skb = rp->skb;
792 dma_addr_t map = rp->mapping;
793 struct rx_header *rh;
794 u16 len;
795
796 dma_sync_single_for_cpu(bp->sdev->dma_dev, map,
797 RX_PKT_BUF_SZ,
798 DMA_FROM_DEVICE);
799 rh = (struct rx_header *) skb->data;
800 len = le16_to_cpu(rh->len);
801 if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) ||
802 (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
803 drop_it:
804 b44_recycle_rx(bp, cons, bp->rx_prod);
805 drop_it_no_recycle:
806 bp->dev->stats.rx_dropped++;
807 goto next_pkt;
808 }
809
810 if (len == 0) {
811 int i = 0;
812
813 do {
814 udelay(2);
815 barrier();
816 len = le16_to_cpu(rh->len);
817 } while (len == 0 && i++ < 5);
818 if (len == 0)
819 goto drop_it;
820 }
821
822 /* Omit CRC. */
823 len -= 4;
824
825 if (!bp->force_copybreak && len > RX_COPY_THRESHOLD) {
826 int skb_size;
827 skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
828 if (skb_size < 0)
829 goto drop_it;
830 dma_unmap_single(bp->sdev->dma_dev, map,
831 skb_size, DMA_FROM_DEVICE);
832 /* Leave out rx_header */
833 skb_put(skb, len + RX_PKT_OFFSET);
834 skb_pull(skb, RX_PKT_OFFSET);
835 } else {
836 struct sk_buff *copy_skb;
837
838 b44_recycle_rx(bp, cons, bp->rx_prod);
839 copy_skb = napi_alloc_skb(&bp->napi, len);
840 if (copy_skb == NULL)
841 goto drop_it_no_recycle;
842
843 skb_put(copy_skb, len);
844 /* DMA sync done above, copy just the actual packet */
845 skb_copy_from_linear_data_offset(skb, RX_PKT_OFFSET,
846 copy_skb->data, len);
847 skb = copy_skb;
848 }
849 skb_checksum_none_assert(skb);
850 skb->protocol = eth_type_trans(skb, bp->dev);
851 netif_receive_skb(skb);
852 received++;
853 budget--;
854 next_pkt:
855 bp->rx_prod = (bp->rx_prod + 1) &
856 (B44_RX_RING_SIZE - 1);
857 cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
858 }
859
860 bp->rx_cons = cons;
861 bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
862
863 return received;
864 }
865
866 static int b44_poll(struct napi_struct *napi, int budget)
867 {
868 struct b44 *bp = container_of(napi, struct b44, napi);
869 int work_done;
870 unsigned long flags;
871
872 spin_lock_irqsave(&bp->lock, flags);
873
874 if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
875 /* spin_lock(&bp->tx_lock); */
876 b44_tx(bp);
877 /* spin_unlock(&bp->tx_lock); */
878 }
879 if (bp->istat & ISTAT_RFO) { /* fast recovery, in ~20msec */
880 bp->istat &= ~ISTAT_RFO;
881 b44_disable_ints(bp);
882 ssb_device_enable(bp->sdev, 0); /* resets ISTAT_RFO */
883 b44_init_rings(bp);
884 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
885 netif_wake_queue(bp->dev);
886 }
887
888 spin_unlock_irqrestore(&bp->lock, flags);
889
890 work_done = 0;
891 if (bp->istat & ISTAT_RX)
892 work_done += b44_rx(bp, budget);
893
894 if (bp->istat & ISTAT_ERRORS) {
895 spin_lock_irqsave(&bp->lock, flags);
896 b44_halt(bp);
897 b44_init_rings(bp);
898 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
899 netif_wake_queue(bp->dev);
900 spin_unlock_irqrestore(&bp->lock, flags);
901 work_done = 0;
902 }
903
904 if (work_done < budget) {
905 napi_complete_done(napi, work_done);
906 b44_enable_ints(bp);
907 }
908
909 return work_done;
910 }
911
912 static irqreturn_t b44_interrupt(int irq, void *dev_id)
913 {
914 struct net_device *dev = dev_id;
915 struct b44 *bp = netdev_priv(dev);
916 u32 istat, imask;
917 int handled = 0;
918
919 spin_lock(&bp->lock);
920
921 istat = br32(bp, B44_ISTAT);
922 imask = br32(bp, B44_IMASK);
923
924 /* The interrupt mask register controls which interrupt bits
925 * will actually raise an interrupt to the CPU when set by hw/firmware,
926 * but doesn't mask off the bits.
927 */
928 istat &= imask;
929 if (istat) {
930 handled = 1;
931
932 if (unlikely(!netif_running(dev))) {
933 netdev_info(dev, "late interrupt\n");
934 goto irq_ack;
935 }
936
937 if (napi_schedule_prep(&bp->napi)) {
938 /* NOTE: These writes are posted by the readback of
939 * the ISTAT register below.
940 */
941 bp->istat = istat;
942 __b44_disable_ints(bp);
943 __napi_schedule(&bp->napi);
944 }
945
946 irq_ack:
947 bw32(bp, B44_ISTAT, istat);
948 br32(bp, B44_ISTAT);
949 }
950 spin_unlock(&bp->lock);
951 return IRQ_RETVAL(handled);
952 }
953
954 static void b44_tx_timeout(struct net_device *dev)
955 {
956 struct b44 *bp = netdev_priv(dev);
957
958 netdev_err(dev, "transmit timed out, resetting\n");
959
960 spin_lock_irq(&bp->lock);
961
962 b44_halt(bp);
963 b44_init_rings(bp);
964 b44_init_hw(bp, B44_FULL_RESET);
965
966 spin_unlock_irq(&bp->lock);
967
968 b44_enable_ints(bp);
969
970 netif_wake_queue(dev);
971 }
972
973 static netdev_tx_t b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
974 {
975 struct b44 *bp = netdev_priv(dev);
976 int rc = NETDEV_TX_OK;
977 dma_addr_t mapping;
978 u32 len, entry, ctrl;
979 unsigned long flags;
980
981 len = skb->len;
982 spin_lock_irqsave(&bp->lock, flags);
983
984 /* This is a hard error, log it. */
985 if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
986 netif_stop_queue(dev);
987 netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
988 goto err_out;
989 }
990
991 mapping = dma_map_single(bp->sdev->dma_dev, skb->data, len, DMA_TO_DEVICE);
992 if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
993 struct sk_buff *bounce_skb;
994
995 /* Chip can't handle DMA to/from >1GB, use bounce buffer */
996 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
997 dma_unmap_single(bp->sdev->dma_dev, mapping, len,
998 DMA_TO_DEVICE);
999
1000 bounce_skb = alloc_skb(len, GFP_ATOMIC | GFP_DMA);
1001 if (!bounce_skb)
1002 goto err_out;
1003
1004 mapping = dma_map_single(bp->sdev->dma_dev, bounce_skb->data,
1005 len, DMA_TO_DEVICE);
1006 if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
1007 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
1008 dma_unmap_single(bp->sdev->dma_dev, mapping,
1009 len, DMA_TO_DEVICE);
1010 dev_kfree_skb_any(bounce_skb);
1011 goto err_out;
1012 }
1013
1014 skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
1015 dev_kfree_skb_any(skb);
1016 skb = bounce_skb;
1017 }
1018
1019 entry = bp->tx_prod;
1020 bp->tx_buffers[entry].skb = skb;
1021 bp->tx_buffers[entry].mapping = mapping;
1022
1023 ctrl = (len & DESC_CTRL_LEN);
1024 ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
1025 if (entry == (B44_TX_RING_SIZE - 1))
1026 ctrl |= DESC_CTRL_EOT;
1027
1028 bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1029 bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1030
1031 if (bp->flags & B44_FLAG_TX_RING_HACK)
1032 b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
1033 entry * sizeof(bp->tx_ring[0]),
1034 DMA_TO_DEVICE);
1035
1036 entry = NEXT_TX(entry);
1037
1038 bp->tx_prod = entry;
1039
1040 wmb();
1041
1042 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1043 if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1044 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1045 if (bp->flags & B44_FLAG_REORDER_BUG)
1046 br32(bp, B44_DMATX_PTR);
1047
1048 netdev_sent_queue(dev, skb->len);
1049
1050 if (TX_BUFFS_AVAIL(bp) < 1)
1051 netif_stop_queue(dev);
1052
1053 out_unlock:
1054 spin_unlock_irqrestore(&bp->lock, flags);
1055
1056 return rc;
1057
1058 err_out:
1059 rc = NETDEV_TX_BUSY;
1060 goto out_unlock;
1061 }
1062
1063 static int b44_change_mtu(struct net_device *dev, int new_mtu)
1064 {
1065 struct b44 *bp = netdev_priv(dev);
1066
1067 if (!netif_running(dev)) {
1068 /* We'll just catch it later when the
1069 * device is up'd.
1070 */
1071 dev->mtu = new_mtu;
1072 return 0;
1073 }
1074
1075 spin_lock_irq(&bp->lock);
1076 b44_halt(bp);
1077 dev->mtu = new_mtu;
1078 b44_init_rings(bp);
1079 b44_init_hw(bp, B44_FULL_RESET);
1080 spin_unlock_irq(&bp->lock);
1081
1082 b44_enable_ints(bp);
1083
1084 return 0;
1085 }
1086
1087 /* Free up pending packets in all rx/tx rings.
1088 *
1089 * The chip has been shut down and the driver detached from
1090 * the networking, so no interrupts or new tx packets will
1091 * end up in the driver. bp->lock is not held and we are not
1092 * in an interrupt context and thus may sleep.
1093 */
1094 static void b44_free_rings(struct b44 *bp)
1095 {
1096 struct ring_info *rp;
1097 int i;
1098
1099 for (i = 0; i < B44_RX_RING_SIZE; i++) {
1100 rp = &bp->rx_buffers[i];
1101
1102 if (rp->skb == NULL)
1103 continue;
1104 dma_unmap_single(bp->sdev->dma_dev, rp->mapping, RX_PKT_BUF_SZ,
1105 DMA_FROM_DEVICE);
1106 dev_kfree_skb_any(rp->skb);
1107 rp->skb = NULL;
1108 }
1109
1110 /* XXX needs changes once NETIF_F_SG is set... */
1111 for (i = 0; i < B44_TX_RING_SIZE; i++) {
1112 rp = &bp->tx_buffers[i];
1113
1114 if (rp->skb == NULL)
1115 continue;
1116 dma_unmap_single(bp->sdev->dma_dev, rp->mapping, rp->skb->len,
1117 DMA_TO_DEVICE);
1118 dev_kfree_skb_any(rp->skb);
1119 rp->skb = NULL;
1120 }
1121 }
1122
1123 /* Initialize tx/rx rings for packet processing.
1124 *
1125 * The chip has been shut down and the driver detached from
1126 * the networking, so no interrupts or new tx packets will
1127 * end up in the driver.
1128 */
1129 static void b44_init_rings(struct b44 *bp)
1130 {
1131 int i;
1132
1133 b44_free_rings(bp);
1134
1135 memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1136 memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1137
1138 if (bp->flags & B44_FLAG_RX_RING_HACK)
1139 dma_sync_single_for_device(bp->sdev->dma_dev, bp->rx_ring_dma,
1140 DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
1141
1142 if (bp->flags & B44_FLAG_TX_RING_HACK)
1143 dma_sync_single_for_device(bp->sdev->dma_dev, bp->tx_ring_dma,
1144 DMA_TABLE_BYTES, DMA_TO_DEVICE);
1145
1146 for (i = 0; i < bp->rx_pending; i++) {
1147 if (b44_alloc_rx_skb(bp, -1, i) < 0)
1148 break;
1149 }
1150 }
1151
1152 /*
1153 * Must not be invoked with interrupt sources disabled and
1154 * the hardware shutdown down.
1155 */
1156 static void b44_free_consistent(struct b44 *bp)
1157 {
1158 kfree(bp->rx_buffers);
1159 bp->rx_buffers = NULL;
1160 kfree(bp->tx_buffers);
1161 bp->tx_buffers = NULL;
1162 if (bp->rx_ring) {
1163 if (bp->flags & B44_FLAG_RX_RING_HACK) {
1164 dma_unmap_single(bp->sdev->dma_dev, bp->rx_ring_dma,
1165 DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
1166 kfree(bp->rx_ring);
1167 } else
1168 dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
1169 bp->rx_ring, bp->rx_ring_dma);
1170 bp->rx_ring = NULL;
1171 bp->flags &= ~B44_FLAG_RX_RING_HACK;
1172 }
1173 if (bp->tx_ring) {
1174 if (bp->flags & B44_FLAG_TX_RING_HACK) {
1175 dma_unmap_single(bp->sdev->dma_dev, bp->tx_ring_dma,
1176 DMA_TABLE_BYTES, DMA_TO_DEVICE);
1177 kfree(bp->tx_ring);
1178 } else
1179 dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
1180 bp->tx_ring, bp->tx_ring_dma);
1181 bp->tx_ring = NULL;
1182 bp->flags &= ~B44_FLAG_TX_RING_HACK;
1183 }
1184 }
1185
1186 /*
1187 * Must not be invoked with interrupt sources disabled and
1188 * the hardware shutdown down. Can sleep.
1189 */
1190 static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
1191 {
1192 int size;
1193
1194 size = B44_RX_RING_SIZE * sizeof(struct ring_info);
1195 bp->rx_buffers = kzalloc(size, gfp);
1196 if (!bp->rx_buffers)
1197 goto out_err;
1198
1199 size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1200 bp->tx_buffers = kzalloc(size, gfp);
1201 if (!bp->tx_buffers)
1202 goto out_err;
1203
1204 size = DMA_TABLE_BYTES;
1205 bp->rx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
1206 &bp->rx_ring_dma, gfp);
1207 if (!bp->rx_ring) {
1208 /* Allocation may have failed due to pci_alloc_consistent
1209 insisting on use of GFP_DMA, which is more restrictive
1210 than necessary... */
1211 struct dma_desc *rx_ring;
1212 dma_addr_t rx_ring_dma;
1213
1214 rx_ring = kzalloc(size, gfp);
1215 if (!rx_ring)
1216 goto out_err;
1217
1218 rx_ring_dma = dma_map_single(bp->sdev->dma_dev, rx_ring,
1219 DMA_TABLE_BYTES,
1220 DMA_BIDIRECTIONAL);
1221
1222 if (dma_mapping_error(bp->sdev->dma_dev, rx_ring_dma) ||
1223 rx_ring_dma + size > DMA_BIT_MASK(30)) {
1224 kfree(rx_ring);
1225 goto out_err;
1226 }
1227
1228 bp->rx_ring = rx_ring;
1229 bp->rx_ring_dma = rx_ring_dma;
1230 bp->flags |= B44_FLAG_RX_RING_HACK;
1231 }
1232
1233 bp->tx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
1234 &bp->tx_ring_dma, gfp);
1235 if (!bp->tx_ring) {
1236 /* Allocation may have failed due to ssb_dma_alloc_consistent
1237 insisting on use of GFP_DMA, which is more restrictive
1238 than necessary... */
1239 struct dma_desc *tx_ring;
1240 dma_addr_t tx_ring_dma;
1241
1242 tx_ring = kzalloc(size, gfp);
1243 if (!tx_ring)
1244 goto out_err;
1245
1246 tx_ring_dma = dma_map_single(bp->sdev->dma_dev, tx_ring,
1247 DMA_TABLE_BYTES,
1248 DMA_TO_DEVICE);
1249
1250 if (dma_mapping_error(bp->sdev->dma_dev, tx_ring_dma) ||
1251 tx_ring_dma + size > DMA_BIT_MASK(30)) {
1252 kfree(tx_ring);
1253 goto out_err;
1254 }
1255
1256 bp->tx_ring = tx_ring;
1257 bp->tx_ring_dma = tx_ring_dma;
1258 bp->flags |= B44_FLAG_TX_RING_HACK;
1259 }
1260
1261 return 0;
1262
1263 out_err:
1264 b44_free_consistent(bp);
1265 return -ENOMEM;
1266 }
1267
1268 /* bp->lock is held. */
1269 static void b44_clear_stats(struct b44 *bp)
1270 {
1271 unsigned long reg;
1272
1273 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1274 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1275 br32(bp, reg);
1276 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1277 br32(bp, reg);
1278 }
1279
1280 /* bp->lock is held. */
1281 static void b44_chip_reset(struct b44 *bp, int reset_kind)
1282 {
1283 struct ssb_device *sdev = bp->sdev;
1284 bool was_enabled;
1285
1286 was_enabled = ssb_device_is_enabled(bp->sdev);
1287
1288 ssb_device_enable(bp->sdev, 0);
1289 ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
1290
1291 if (was_enabled) {
1292 bw32(bp, B44_RCV_LAZY, 0);
1293 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1294 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1);
1295 bw32(bp, B44_DMATX_CTRL, 0);
1296 bp->tx_prod = bp->tx_cons = 0;
1297 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1298 b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1299 100, 0);
1300 }
1301 bw32(bp, B44_DMARX_CTRL, 0);
1302 bp->rx_prod = bp->rx_cons = 0;
1303 }
1304
1305 b44_clear_stats(bp);
1306
1307 /*
1308 * Don't enable PHY if we are doing a partial reset
1309 * we are probably going to power down
1310 */
1311 if (reset_kind == B44_CHIP_RESET_PARTIAL)
1312 return;
1313
1314 switch (sdev->bus->bustype) {
1315 case SSB_BUSTYPE_SSB:
1316 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1317 (DIV_ROUND_CLOSEST(ssb_clockspeed(sdev->bus),
1318 B44_MDC_RATIO)
1319 & MDIO_CTRL_MAXF_MASK)));
1320 break;
1321 case SSB_BUSTYPE_PCI:
1322 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1323 (0x0d & MDIO_CTRL_MAXF_MASK)));
1324 break;
1325 case SSB_BUSTYPE_PCMCIA:
1326 case SSB_BUSTYPE_SDIO:
1327 WARN_ON(1); /* A device with this bus does not exist. */
1328 break;
1329 }
1330
1331 br32(bp, B44_MDIO_CTRL);
1332
1333 if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1334 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1335 br32(bp, B44_ENET_CTRL);
1336 bp->flags |= B44_FLAG_EXTERNAL_PHY;
1337 } else {
1338 u32 val = br32(bp, B44_DEVCTRL);
1339
1340 if (val & DEVCTRL_EPR) {
1341 bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1342 br32(bp, B44_DEVCTRL);
1343 udelay(100);
1344 }
1345 bp->flags &= ~B44_FLAG_EXTERNAL_PHY;
1346 }
1347 }
1348
1349 /* bp->lock is held. */
1350 static void b44_halt(struct b44 *bp)
1351 {
1352 b44_disable_ints(bp);
1353 /* reset PHY */
1354 b44_phy_reset(bp);
1355 /* power down PHY */
1356 netdev_info(bp->dev, "powering down PHY\n");
1357 bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
1358 /* now reset the chip, but without enabling the MAC&PHY
1359 * part of it. This has to be done _after_ we shut down the PHY */
1360 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
1361 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
1362 else
1363 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1364 }
1365
1366 /* bp->lock is held. */
1367 static void __b44_set_mac_addr(struct b44 *bp)
1368 {
1369 bw32(bp, B44_CAM_CTRL, 0);
1370 if (!(bp->dev->flags & IFF_PROMISC)) {
1371 u32 val;
1372
1373 __b44_cam_write(bp, bp->dev->dev_addr, 0);
1374 val = br32(bp, B44_CAM_CTRL);
1375 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1376 }
1377 }
1378
1379 static int b44_set_mac_addr(struct net_device *dev, void *p)
1380 {
1381 struct b44 *bp = netdev_priv(dev);
1382 struct sockaddr *addr = p;
1383 u32 val;
1384
1385 if (netif_running(dev))
1386 return -EBUSY;
1387
1388 if (!is_valid_ether_addr(addr->sa_data))
1389 return -EINVAL;
1390
1391 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1392
1393 spin_lock_irq(&bp->lock);
1394
1395 val = br32(bp, B44_RXCONFIG);
1396 if (!(val & RXCONFIG_CAM_ABSENT))
1397 __b44_set_mac_addr(bp);
1398
1399 spin_unlock_irq(&bp->lock);
1400
1401 return 0;
1402 }
1403
1404 /* Called at device open time to get the chip ready for
1405 * packet processing. Invoked with bp->lock held.
1406 */
1407 static void __b44_set_rx_mode(struct net_device *);
1408 static void b44_init_hw(struct b44 *bp, int reset_kind)
1409 {
1410 u32 val;
1411
1412 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
1413 if (reset_kind == B44_FULL_RESET) {
1414 b44_phy_reset(bp);
1415 b44_setup_phy(bp);
1416 }
1417
1418 /* Enable CRC32, set proper LED modes and power on PHY */
1419 bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
1420 bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
1421
1422 /* This sets the MAC address too. */
1423 __b44_set_rx_mode(bp->dev);
1424
1425 /* MTU + eth header + possible VLAN tag + struct rx_header */
1426 bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1427 bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1428
1429 bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
1430 if (reset_kind == B44_PARTIAL_RESET) {
1431 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1432 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1433 } else {
1434 bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
1435 bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
1436 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1437 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1438 bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
1439
1440 bw32(bp, B44_DMARX_PTR, bp->rx_pending);
1441 bp->rx_prod = bp->rx_pending;
1442
1443 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1444 }
1445
1446 val = br32(bp, B44_ENET_CTRL);
1447 bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
1448
1449 netdev_reset_queue(bp->dev);
1450 }
1451
1452 static int b44_open(struct net_device *dev)
1453 {
1454 struct b44 *bp = netdev_priv(dev);
1455 int err;
1456
1457 err = b44_alloc_consistent(bp, GFP_KERNEL);
1458 if (err)
1459 goto out;
1460
1461 napi_enable(&bp->napi);
1462
1463 b44_init_rings(bp);
1464 b44_init_hw(bp, B44_FULL_RESET);
1465
1466 b44_check_phy(bp);
1467
1468 err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
1469 if (unlikely(err < 0)) {
1470 napi_disable(&bp->napi);
1471 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1472 b44_free_rings(bp);
1473 b44_free_consistent(bp);
1474 goto out;
1475 }
1476
1477 init_timer(&bp->timer);
1478 bp->timer.expires = jiffies + HZ;
1479 bp->timer.data = (unsigned long) bp;
1480 bp->timer.function = b44_timer;
1481 add_timer(&bp->timer);
1482
1483 b44_enable_ints(bp);
1484
1485 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
1486 phy_start(dev->phydev);
1487
1488 netif_start_queue(dev);
1489 out:
1490 return err;
1491 }
1492
1493 #ifdef CONFIG_NET_POLL_CONTROLLER
1494 /*
1495 * Polling receive - used by netconsole and other diagnostic tools
1496 * to allow network i/o with interrupts disabled.
1497 */
1498 static void b44_poll_controller(struct net_device *dev)
1499 {
1500 disable_irq(dev->irq);
1501 b44_interrupt(dev->irq, dev);
1502 enable_irq(dev->irq);
1503 }
1504 #endif
1505
1506 static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
1507 {
1508 u32 i;
1509 u32 *pattern = (u32 *) pp;
1510
1511 for (i = 0; i < bytes; i += sizeof(u32)) {
1512 bw32(bp, B44_FILT_ADDR, table_offset + i);
1513 bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
1514 }
1515 }
1516
1517 static int b44_magic_pattern(u8 *macaddr, u8 *ppattern, u8 *pmask, int offset)
1518 {
1519 int magicsync = 6;
1520 int k, j, len = offset;
1521 int ethaddr_bytes = ETH_ALEN;
1522
1523 memset(ppattern + offset, 0xff, magicsync);
1524 for (j = 0; j < magicsync; j++)
1525 set_bit(len++, (unsigned long *) pmask);
1526
1527 for (j = 0; j < B44_MAX_PATTERNS; j++) {
1528 if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
1529 ethaddr_bytes = ETH_ALEN;
1530 else
1531 ethaddr_bytes = B44_PATTERN_SIZE - len;
1532 if (ethaddr_bytes <=0)
1533 break;
1534 for (k = 0; k< ethaddr_bytes; k++) {
1535 ppattern[offset + magicsync +
1536 (j * ETH_ALEN) + k] = macaddr[k];
1537 set_bit(len++, (unsigned long *) pmask);
1538 }
1539 }
1540 return len - 1;
1541 }
1542
1543 /* Setup magic packet patterns in the b44 WOL
1544 * pattern matching filter.
1545 */
1546 static void b44_setup_pseudo_magicp(struct b44 *bp)
1547 {
1548
1549 u32 val;
1550 int plen0, plen1, plen2;
1551 u8 *pwol_pattern;
1552 u8 pwol_mask[B44_PMASK_SIZE];
1553
1554 pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
1555 if (!pwol_pattern)
1556 return;
1557
1558 /* Ipv4 magic packet pattern - pattern 0.*/
1559 memset(pwol_mask, 0, B44_PMASK_SIZE);
1560 plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1561 B44_ETHIPV4UDP_HLEN);
1562
1563 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
1564 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
1565
1566 /* Raw ethernet II magic packet pattern - pattern 1 */
1567 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1568 memset(pwol_mask, 0, B44_PMASK_SIZE);
1569 plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1570 ETH_HLEN);
1571
1572 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1573 B44_PATTERN_BASE + B44_PATTERN_SIZE);
1574 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1575 B44_PMASK_BASE + B44_PMASK_SIZE);
1576
1577 /* Ipv6 magic packet pattern - pattern 2 */
1578 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1579 memset(pwol_mask, 0, B44_PMASK_SIZE);
1580 plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1581 B44_ETHIPV6UDP_HLEN);
1582
1583 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1584 B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
1585 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1586 B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
1587
1588 kfree(pwol_pattern);
1589
1590 /* set these pattern's lengths: one less than each real length */
1591 val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
1592 bw32(bp, B44_WKUP_LEN, val);
1593
1594 /* enable wakeup pattern matching */
1595 val = br32(bp, B44_DEVCTRL);
1596 bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
1597
1598 }
1599
1600 #ifdef CONFIG_B44_PCI
1601 static void b44_setup_wol_pci(struct b44 *bp)
1602 {
1603 u16 val;
1604
1605 if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
1606 bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
1607 pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
1608 pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
1609 }
1610 }
1611 #else
1612 static inline void b44_setup_wol_pci(struct b44 *bp) { }
1613 #endif /* CONFIG_B44_PCI */
1614
1615 static void b44_setup_wol(struct b44 *bp)
1616 {
1617 u32 val;
1618
1619 bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
1620
1621 if (bp->flags & B44_FLAG_B0_ANDLATER) {
1622
1623 bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
1624
1625 val = bp->dev->dev_addr[2] << 24 |
1626 bp->dev->dev_addr[3] << 16 |
1627 bp->dev->dev_addr[4] << 8 |
1628 bp->dev->dev_addr[5];
1629 bw32(bp, B44_ADDR_LO, val);
1630
1631 val = bp->dev->dev_addr[0] << 8 |
1632 bp->dev->dev_addr[1];
1633 bw32(bp, B44_ADDR_HI, val);
1634
1635 val = br32(bp, B44_DEVCTRL);
1636 bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
1637
1638 } else {
1639 b44_setup_pseudo_magicp(bp);
1640 }
1641 b44_setup_wol_pci(bp);
1642 }
1643
1644 static int b44_close(struct net_device *dev)
1645 {
1646 struct b44 *bp = netdev_priv(dev);
1647
1648 netif_stop_queue(dev);
1649
1650 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
1651 phy_stop(dev->phydev);
1652
1653 napi_disable(&bp->napi);
1654
1655 del_timer_sync(&bp->timer);
1656
1657 spin_lock_irq(&bp->lock);
1658
1659 b44_halt(bp);
1660 b44_free_rings(bp);
1661 netif_carrier_off(dev);
1662
1663 spin_unlock_irq(&bp->lock);
1664
1665 free_irq(dev->irq, dev);
1666
1667 if (bp->flags & B44_FLAG_WOL_ENABLE) {
1668 b44_init_hw(bp, B44_PARTIAL_RESET);
1669 b44_setup_wol(bp);
1670 }
1671
1672 b44_free_consistent(bp);
1673
1674 return 0;
1675 }
1676
1677 static void b44_get_stats64(struct net_device *dev,
1678 struct rtnl_link_stats64 *nstat)
1679 {
1680 struct b44 *bp = netdev_priv(dev);
1681 struct b44_hw_stats *hwstat = &bp->hw_stats;
1682 unsigned int start;
1683
1684 do {
1685 start = u64_stats_fetch_begin_irq(&hwstat->syncp);
1686
1687 /* Convert HW stats into rtnl_link_stats64 stats. */
1688 nstat->rx_packets = hwstat->rx_pkts;
1689 nstat->tx_packets = hwstat->tx_pkts;
1690 nstat->rx_bytes = hwstat->rx_octets;
1691 nstat->tx_bytes = hwstat->tx_octets;
1692 nstat->tx_errors = (hwstat->tx_jabber_pkts +
1693 hwstat->tx_oversize_pkts +
1694 hwstat->tx_underruns +
1695 hwstat->tx_excessive_cols +
1696 hwstat->tx_late_cols);
1697 nstat->multicast = hwstat->rx_multicast_pkts;
1698 nstat->collisions = hwstat->tx_total_cols;
1699
1700 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1701 hwstat->rx_undersize);
1702 nstat->rx_over_errors = hwstat->rx_missed_pkts;
1703 nstat->rx_frame_errors = hwstat->rx_align_errs;
1704 nstat->rx_crc_errors = hwstat->rx_crc_errs;
1705 nstat->rx_errors = (hwstat->rx_jabber_pkts +
1706 hwstat->rx_oversize_pkts +
1707 hwstat->rx_missed_pkts +
1708 hwstat->rx_crc_align_errs +
1709 hwstat->rx_undersize +
1710 hwstat->rx_crc_errs +
1711 hwstat->rx_align_errs +
1712 hwstat->rx_symbol_errs);
1713
1714 nstat->tx_aborted_errors = hwstat->tx_underruns;
1715 #if 0
1716 /* Carrier lost counter seems to be broken for some devices */
1717 nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1718 #endif
1719 } while (u64_stats_fetch_retry_irq(&hwstat->syncp, start));
1720
1721 }
1722
1723 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1724 {
1725 struct netdev_hw_addr *ha;
1726 int i, num_ents;
1727
1728 num_ents = min_t(int, netdev_mc_count(dev), B44_MCAST_TABLE_SIZE);
1729 i = 0;
1730 netdev_for_each_mc_addr(ha, dev) {
1731 if (i == num_ents)
1732 break;
1733 __b44_cam_write(bp, ha->addr, i++ + 1);
1734 }
1735 return i+1;
1736 }
1737
1738 static void __b44_set_rx_mode(struct net_device *dev)
1739 {
1740 struct b44 *bp = netdev_priv(dev);
1741 u32 val;
1742
1743 val = br32(bp, B44_RXCONFIG);
1744 val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1745 if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
1746 val |= RXCONFIG_PROMISC;
1747 bw32(bp, B44_RXCONFIG, val);
1748 } else {
1749 unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
1750 int i = 1;
1751
1752 __b44_set_mac_addr(bp);
1753
1754 if ((dev->flags & IFF_ALLMULTI) ||
1755 (netdev_mc_count(dev) > B44_MCAST_TABLE_SIZE))
1756 val |= RXCONFIG_ALLMULTI;
1757 else
1758 i = __b44_load_mcast(bp, dev);
1759
1760 for (; i < 64; i++)
1761 __b44_cam_write(bp, zero, i);
1762
1763 bw32(bp, B44_RXCONFIG, val);
1764 val = br32(bp, B44_CAM_CTRL);
1765 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1766 }
1767 }
1768
1769 static void b44_set_rx_mode(struct net_device *dev)
1770 {
1771 struct b44 *bp = netdev_priv(dev);
1772
1773 spin_lock_irq(&bp->lock);
1774 __b44_set_rx_mode(dev);
1775 spin_unlock_irq(&bp->lock);
1776 }
1777
1778 static u32 b44_get_msglevel(struct net_device *dev)
1779 {
1780 struct b44 *bp = netdev_priv(dev);
1781 return bp->msg_enable;
1782 }
1783
1784 static void b44_set_msglevel(struct net_device *dev, u32 value)
1785 {
1786 struct b44 *bp = netdev_priv(dev);
1787 bp->msg_enable = value;
1788 }
1789
1790 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1791 {
1792 struct b44 *bp = netdev_priv(dev);
1793 struct ssb_bus *bus = bp->sdev->bus;
1794
1795 strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
1796 strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
1797 switch (bus->bustype) {
1798 case SSB_BUSTYPE_PCI:
1799 strlcpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
1800 break;
1801 case SSB_BUSTYPE_SSB:
1802 strlcpy(info->bus_info, "SSB", sizeof(info->bus_info));
1803 break;
1804 case SSB_BUSTYPE_PCMCIA:
1805 case SSB_BUSTYPE_SDIO:
1806 WARN_ON(1); /* A device with this bus does not exist. */
1807 break;
1808 }
1809 }
1810
1811 static int b44_nway_reset(struct net_device *dev)
1812 {
1813 struct b44 *bp = netdev_priv(dev);
1814 u32 bmcr;
1815 int r;
1816
1817 spin_lock_irq(&bp->lock);
1818 b44_readphy(bp, MII_BMCR, &bmcr);
1819 b44_readphy(bp, MII_BMCR, &bmcr);
1820 r = -EINVAL;
1821 if (bmcr & BMCR_ANENABLE) {
1822 b44_writephy(bp, MII_BMCR,
1823 bmcr | BMCR_ANRESTART);
1824 r = 0;
1825 }
1826 spin_unlock_irq(&bp->lock);
1827
1828 return r;
1829 }
1830
1831 static int b44_get_link_ksettings(struct net_device *dev,
1832 struct ethtool_link_ksettings *cmd)
1833 {
1834 struct b44 *bp = netdev_priv(dev);
1835 u32 supported, advertising;
1836
1837 if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
1838 BUG_ON(!dev->phydev);
1839 phy_ethtool_ksettings_get(dev->phydev, cmd);
1840
1841 return 0;
1842 }
1843
1844 supported = (SUPPORTED_Autoneg);
1845 supported |= (SUPPORTED_100baseT_Half |
1846 SUPPORTED_100baseT_Full |
1847 SUPPORTED_10baseT_Half |
1848 SUPPORTED_10baseT_Full |
1849 SUPPORTED_MII);
1850
1851 advertising = 0;
1852 if (bp->flags & B44_FLAG_ADV_10HALF)
1853 advertising |= ADVERTISED_10baseT_Half;
1854 if (bp->flags & B44_FLAG_ADV_10FULL)
1855 advertising |= ADVERTISED_10baseT_Full;
1856 if (bp->flags & B44_FLAG_ADV_100HALF)
1857 advertising |= ADVERTISED_100baseT_Half;
1858 if (bp->flags & B44_FLAG_ADV_100FULL)
1859 advertising |= ADVERTISED_100baseT_Full;
1860 advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1861 cmd->base.speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1862 SPEED_100 : SPEED_10;
1863 cmd->base.duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1864 DUPLEX_FULL : DUPLEX_HALF;
1865 cmd->base.port = 0;
1866 cmd->base.phy_address = bp->phy_addr;
1867 cmd->base.autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1868 AUTONEG_DISABLE : AUTONEG_ENABLE;
1869 if (cmd->base.autoneg == AUTONEG_ENABLE)
1870 advertising |= ADVERTISED_Autoneg;
1871
1872 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1873 supported);
1874 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1875 advertising);
1876
1877 if (!netif_running(dev)){
1878 cmd->base.speed = 0;
1879 cmd->base.duplex = 0xff;
1880 }
1881
1882 return 0;
1883 }
1884
1885 static int b44_set_link_ksettings(struct net_device *dev,
1886 const struct ethtool_link_ksettings *cmd)
1887 {
1888 struct b44 *bp = netdev_priv(dev);
1889 u32 speed;
1890 int ret;
1891 u32 advertising;
1892
1893 if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
1894 BUG_ON(!dev->phydev);
1895 spin_lock_irq(&bp->lock);
1896 if (netif_running(dev))
1897 b44_setup_phy(bp);
1898
1899 ret = phy_ethtool_ksettings_set(dev->phydev, cmd);
1900
1901 spin_unlock_irq(&bp->lock);
1902
1903 return ret;
1904 }
1905
1906 speed = cmd->base.speed;
1907
1908 ethtool_convert_link_mode_to_legacy_u32(&advertising,
1909 cmd->link_modes.advertising);
1910
1911 /* We do not support gigabit. */
1912 if (cmd->base.autoneg == AUTONEG_ENABLE) {
1913 if (advertising &
1914 (ADVERTISED_1000baseT_Half |
1915 ADVERTISED_1000baseT_Full))
1916 return -EINVAL;
1917 } else if ((speed != SPEED_100 &&
1918 speed != SPEED_10) ||
1919 (cmd->base.duplex != DUPLEX_HALF &&
1920 cmd->base.duplex != DUPLEX_FULL)) {
1921 return -EINVAL;
1922 }
1923
1924 spin_lock_irq(&bp->lock);
1925
1926 if (cmd->base.autoneg == AUTONEG_ENABLE) {
1927 bp->flags &= ~(B44_FLAG_FORCE_LINK |
1928 B44_FLAG_100_BASE_T |
1929 B44_FLAG_FULL_DUPLEX |
1930 B44_FLAG_ADV_10HALF |
1931 B44_FLAG_ADV_10FULL |
1932 B44_FLAG_ADV_100HALF |
1933 B44_FLAG_ADV_100FULL);
1934 if (advertising == 0) {
1935 bp->flags |= (B44_FLAG_ADV_10HALF |
1936 B44_FLAG_ADV_10FULL |
1937 B44_FLAG_ADV_100HALF |
1938 B44_FLAG_ADV_100FULL);
1939 } else {
1940 if (advertising & ADVERTISED_10baseT_Half)
1941 bp->flags |= B44_FLAG_ADV_10HALF;
1942 if (advertising & ADVERTISED_10baseT_Full)
1943 bp->flags |= B44_FLAG_ADV_10FULL;
1944 if (advertising & ADVERTISED_100baseT_Half)
1945 bp->flags |= B44_FLAG_ADV_100HALF;
1946 if (advertising & ADVERTISED_100baseT_Full)
1947 bp->flags |= B44_FLAG_ADV_100FULL;
1948 }
1949 } else {
1950 bp->flags |= B44_FLAG_FORCE_LINK;
1951 bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
1952 if (speed == SPEED_100)
1953 bp->flags |= B44_FLAG_100_BASE_T;
1954 if (cmd->base.duplex == DUPLEX_FULL)
1955 bp->flags |= B44_FLAG_FULL_DUPLEX;
1956 }
1957
1958 if (netif_running(dev))
1959 b44_setup_phy(bp);
1960
1961 spin_unlock_irq(&bp->lock);
1962
1963 return 0;
1964 }
1965
1966 static void b44_get_ringparam(struct net_device *dev,
1967 struct ethtool_ringparam *ering)
1968 {
1969 struct b44 *bp = netdev_priv(dev);
1970
1971 ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1972 ering->rx_pending = bp->rx_pending;
1973
1974 /* XXX ethtool lacks a tx_max_pending, oops... */
1975 }
1976
1977 static int b44_set_ringparam(struct net_device *dev,
1978 struct ethtool_ringparam *ering)
1979 {
1980 struct b44 *bp = netdev_priv(dev);
1981
1982 if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1983 (ering->rx_mini_pending != 0) ||
1984 (ering->rx_jumbo_pending != 0) ||
1985 (ering->tx_pending > B44_TX_RING_SIZE - 1))
1986 return -EINVAL;
1987
1988 spin_lock_irq(&bp->lock);
1989
1990 bp->rx_pending = ering->rx_pending;
1991 bp->tx_pending = ering->tx_pending;
1992
1993 b44_halt(bp);
1994 b44_init_rings(bp);
1995 b44_init_hw(bp, B44_FULL_RESET);
1996 netif_wake_queue(bp->dev);
1997 spin_unlock_irq(&bp->lock);
1998
1999 b44_enable_ints(bp);
2000
2001 return 0;
2002 }
2003
2004 static void b44_get_pauseparam(struct net_device *dev,
2005 struct ethtool_pauseparam *epause)
2006 {
2007 struct b44 *bp = netdev_priv(dev);
2008
2009 epause->autoneg =
2010 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
2011 epause->rx_pause =
2012 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
2013 epause->tx_pause =
2014 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
2015 }
2016
2017 static int b44_set_pauseparam(struct net_device *dev,
2018 struct ethtool_pauseparam *epause)
2019 {
2020 struct b44 *bp = netdev_priv(dev);
2021
2022 spin_lock_irq(&bp->lock);
2023 if (epause->autoneg)
2024 bp->flags |= B44_FLAG_PAUSE_AUTO;
2025 else
2026 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
2027 if (epause->rx_pause)
2028 bp->flags |= B44_FLAG_RX_PAUSE;
2029 else
2030 bp->flags &= ~B44_FLAG_RX_PAUSE;
2031 if (epause->tx_pause)
2032 bp->flags |= B44_FLAG_TX_PAUSE;
2033 else
2034 bp->flags &= ~B44_FLAG_TX_PAUSE;
2035 if (bp->flags & B44_FLAG_PAUSE_AUTO) {
2036 b44_halt(bp);
2037 b44_init_rings(bp);
2038 b44_init_hw(bp, B44_FULL_RESET);
2039 } else {
2040 __b44_set_flow_ctrl(bp, bp->flags);
2041 }
2042 spin_unlock_irq(&bp->lock);
2043
2044 b44_enable_ints(bp);
2045
2046 return 0;
2047 }
2048
2049 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2050 {
2051 switch(stringset) {
2052 case ETH_SS_STATS:
2053 memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
2054 break;
2055 }
2056 }
2057
2058 static int b44_get_sset_count(struct net_device *dev, int sset)
2059 {
2060 switch (sset) {
2061 case ETH_SS_STATS:
2062 return ARRAY_SIZE(b44_gstrings);
2063 default:
2064 return -EOPNOTSUPP;
2065 }
2066 }
2067
2068 static void b44_get_ethtool_stats(struct net_device *dev,
2069 struct ethtool_stats *stats, u64 *data)
2070 {
2071 struct b44 *bp = netdev_priv(dev);
2072 struct b44_hw_stats *hwstat = &bp->hw_stats;
2073 u64 *data_src, *data_dst;
2074 unsigned int start;
2075 u32 i;
2076
2077 spin_lock_irq(&bp->lock);
2078 b44_stats_update(bp);
2079 spin_unlock_irq(&bp->lock);
2080
2081 do {
2082 data_src = &hwstat->tx_good_octets;
2083 data_dst = data;
2084 start = u64_stats_fetch_begin_irq(&hwstat->syncp);
2085
2086 for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
2087 *data_dst++ = *data_src++;
2088
2089 } while (u64_stats_fetch_retry_irq(&hwstat->syncp, start));
2090 }
2091
2092 static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2093 {
2094 struct b44 *bp = netdev_priv(dev);
2095
2096 wol->supported = WAKE_MAGIC;
2097 if (bp->flags & B44_FLAG_WOL_ENABLE)
2098 wol->wolopts = WAKE_MAGIC;
2099 else
2100 wol->wolopts = 0;
2101 memset(&wol->sopass, 0, sizeof(wol->sopass));
2102 }
2103
2104 static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2105 {
2106 struct b44 *bp = netdev_priv(dev);
2107
2108 spin_lock_irq(&bp->lock);
2109 if (wol->wolopts & WAKE_MAGIC)
2110 bp->flags |= B44_FLAG_WOL_ENABLE;
2111 else
2112 bp->flags &= ~B44_FLAG_WOL_ENABLE;
2113 spin_unlock_irq(&bp->lock);
2114
2115 device_set_wakeup_enable(bp->sdev->dev, wol->wolopts & WAKE_MAGIC);
2116 return 0;
2117 }
2118
2119 static const struct ethtool_ops b44_ethtool_ops = {
2120 .get_drvinfo = b44_get_drvinfo,
2121 .nway_reset = b44_nway_reset,
2122 .get_link = ethtool_op_get_link,
2123 .get_wol = b44_get_wol,
2124 .set_wol = b44_set_wol,
2125 .get_ringparam = b44_get_ringparam,
2126 .set_ringparam = b44_set_ringparam,
2127 .get_pauseparam = b44_get_pauseparam,
2128 .set_pauseparam = b44_set_pauseparam,
2129 .get_msglevel = b44_get_msglevel,
2130 .set_msglevel = b44_set_msglevel,
2131 .get_strings = b44_get_strings,
2132 .get_sset_count = b44_get_sset_count,
2133 .get_ethtool_stats = b44_get_ethtool_stats,
2134 .get_link_ksettings = b44_get_link_ksettings,
2135 .set_link_ksettings = b44_set_link_ksettings,
2136 };
2137
2138 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2139 {
2140 struct b44 *bp = netdev_priv(dev);
2141 int err = -EINVAL;
2142
2143 if (!netif_running(dev))
2144 goto out;
2145
2146 spin_lock_irq(&bp->lock);
2147 if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
2148 BUG_ON(!dev->phydev);
2149 err = phy_mii_ioctl(dev->phydev, ifr, cmd);
2150 } else {
2151 err = generic_mii_ioctl(&bp->mii_if, if_mii(ifr), cmd, NULL);
2152 }
2153 spin_unlock_irq(&bp->lock);
2154 out:
2155 return err;
2156 }
2157
2158 static int b44_get_invariants(struct b44 *bp)
2159 {
2160 struct ssb_device *sdev = bp->sdev;
2161 int err = 0;
2162 u8 *addr;
2163
2164 bp->dma_offset = ssb_dma_translation(sdev);
2165
2166 if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
2167 instance > 1) {
2168 addr = sdev->bus->sprom.et1mac;
2169 bp->phy_addr = sdev->bus->sprom.et1phyaddr;
2170 } else {
2171 addr = sdev->bus->sprom.et0mac;
2172 bp->phy_addr = sdev->bus->sprom.et0phyaddr;
2173 }
2174 /* Some ROMs have buggy PHY addresses with the high
2175 * bits set (sign extension?). Truncate them to a
2176 * valid PHY address. */
2177 bp->phy_addr &= 0x1F;
2178
2179 memcpy(bp->dev->dev_addr, addr, ETH_ALEN);
2180
2181 if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
2182 pr_err("Invalid MAC address found in EEPROM\n");
2183 return -EINVAL;
2184 }
2185
2186 bp->imask = IMASK_DEF;
2187
2188 /* XXX - really required?
2189 bp->flags |= B44_FLAG_BUGGY_TXPTR;
2190 */
2191
2192 if (bp->sdev->id.revision >= 7)
2193 bp->flags |= B44_FLAG_B0_ANDLATER;
2194
2195 return err;
2196 }
2197
2198 static const struct net_device_ops b44_netdev_ops = {
2199 .ndo_open = b44_open,
2200 .ndo_stop = b44_close,
2201 .ndo_start_xmit = b44_start_xmit,
2202 .ndo_get_stats64 = b44_get_stats64,
2203 .ndo_set_rx_mode = b44_set_rx_mode,
2204 .ndo_set_mac_address = b44_set_mac_addr,
2205 .ndo_validate_addr = eth_validate_addr,
2206 .ndo_do_ioctl = b44_ioctl,
2207 .ndo_tx_timeout = b44_tx_timeout,
2208 .ndo_change_mtu = b44_change_mtu,
2209 #ifdef CONFIG_NET_POLL_CONTROLLER
2210 .ndo_poll_controller = b44_poll_controller,
2211 #endif
2212 };
2213
2214 static void b44_adjust_link(struct net_device *dev)
2215 {
2216 struct b44 *bp = netdev_priv(dev);
2217 struct phy_device *phydev = dev->phydev;
2218 bool status_changed = 0;
2219
2220 BUG_ON(!phydev);
2221
2222 if (bp->old_link != phydev->link) {
2223 status_changed = 1;
2224 bp->old_link = phydev->link;
2225 }
2226
2227 /* reflect duplex change */
2228 if (phydev->link) {
2229 if ((phydev->duplex == DUPLEX_HALF) &&
2230 (bp->flags & B44_FLAG_FULL_DUPLEX)) {
2231 status_changed = 1;
2232 bp->flags &= ~B44_FLAG_FULL_DUPLEX;
2233 } else if ((phydev->duplex == DUPLEX_FULL) &&
2234 !(bp->flags & B44_FLAG_FULL_DUPLEX)) {
2235 status_changed = 1;
2236 bp->flags |= B44_FLAG_FULL_DUPLEX;
2237 }
2238 }
2239
2240 if (status_changed) {
2241 u32 val = br32(bp, B44_TX_CTRL);
2242 if (bp->flags & B44_FLAG_FULL_DUPLEX)
2243 val |= TX_CTRL_DUPLEX;
2244 else
2245 val &= ~TX_CTRL_DUPLEX;
2246 bw32(bp, B44_TX_CTRL, val);
2247 phy_print_status(phydev);
2248 }
2249 }
2250
2251 static int b44_register_phy_one(struct b44 *bp)
2252 {
2253 struct mii_bus *mii_bus;
2254 struct ssb_device *sdev = bp->sdev;
2255 struct phy_device *phydev;
2256 char bus_id[MII_BUS_ID_SIZE + 3];
2257 struct ssb_sprom *sprom = &sdev->bus->sprom;
2258 int err;
2259
2260 mii_bus = mdiobus_alloc();
2261 if (!mii_bus) {
2262 dev_err(sdev->dev, "mdiobus_alloc() failed\n");
2263 err = -ENOMEM;
2264 goto err_out;
2265 }
2266
2267 mii_bus->priv = bp;
2268 mii_bus->read = b44_mdio_read_phylib;
2269 mii_bus->write = b44_mdio_write_phylib;
2270 mii_bus->name = "b44_eth_mii";
2271 mii_bus->parent = sdev->dev;
2272 mii_bus->phy_mask = ~(1 << bp->phy_addr);
2273 snprintf(mii_bus->id, MII_BUS_ID_SIZE, "%x", instance);
2274
2275 bp->mii_bus = mii_bus;
2276
2277 err = mdiobus_register(mii_bus);
2278 if (err) {
2279 dev_err(sdev->dev, "failed to register MII bus\n");
2280 goto err_out_mdiobus;
2281 }
2282
2283 if (!mdiobus_is_registered_device(bp->mii_bus, bp->phy_addr) &&
2284 (sprom->boardflags_lo & (B44_BOARDFLAG_ROBO | B44_BOARDFLAG_ADM))) {
2285
2286 dev_info(sdev->dev,
2287 "could not find PHY at %i, use fixed one\n",
2288 bp->phy_addr);
2289
2290 bp->phy_addr = 0;
2291 snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, "fixed-0",
2292 bp->phy_addr);
2293 } else {
2294 snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, mii_bus->id,
2295 bp->phy_addr);
2296 }
2297
2298 phydev = phy_connect(bp->dev, bus_id, &b44_adjust_link,
2299 PHY_INTERFACE_MODE_MII);
2300 if (IS_ERR(phydev)) {
2301 dev_err(sdev->dev, "could not attach PHY at %i\n",
2302 bp->phy_addr);
2303 err = PTR_ERR(phydev);
2304 goto err_out_mdiobus_unregister;
2305 }
2306
2307 /* mask with MAC supported features */
2308 phydev->supported &= (SUPPORTED_100baseT_Half |
2309 SUPPORTED_100baseT_Full |
2310 SUPPORTED_Autoneg |
2311 SUPPORTED_MII);
2312 phydev->advertising = phydev->supported;
2313
2314 bp->old_link = 0;
2315 bp->phy_addr = phydev->mdio.addr;
2316
2317 phy_attached_info(phydev);
2318
2319 return 0;
2320
2321 err_out_mdiobus_unregister:
2322 mdiobus_unregister(mii_bus);
2323
2324 err_out_mdiobus:
2325 mdiobus_free(mii_bus);
2326
2327 err_out:
2328 return err;
2329 }
2330
2331 static void b44_unregister_phy_one(struct b44 *bp)
2332 {
2333 struct net_device *dev = bp->dev;
2334 struct mii_bus *mii_bus = bp->mii_bus;
2335
2336 phy_disconnect(dev->phydev);
2337 mdiobus_unregister(mii_bus);
2338 mdiobus_free(mii_bus);
2339 }
2340
2341 static int b44_init_one(struct ssb_device *sdev,
2342 const struct ssb_device_id *ent)
2343 {
2344 struct net_device *dev;
2345 struct b44 *bp;
2346 int err;
2347
2348 instance++;
2349
2350 pr_info_once("%s version %s\n", DRV_DESCRIPTION, DRV_MODULE_VERSION);
2351
2352 dev = alloc_etherdev(sizeof(*bp));
2353 if (!dev) {
2354 err = -ENOMEM;
2355 goto out;
2356 }
2357
2358 SET_NETDEV_DEV(dev, sdev->dev);
2359
2360 /* No interesting netdevice features in this card... */
2361 dev->features |= 0;
2362
2363 bp = netdev_priv(dev);
2364 bp->sdev = sdev;
2365 bp->dev = dev;
2366 bp->force_copybreak = 0;
2367
2368 bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
2369
2370 spin_lock_init(&bp->lock);
2371 u64_stats_init(&bp->hw_stats.syncp);
2372
2373 bp->rx_pending = B44_DEF_RX_RING_PENDING;
2374 bp->tx_pending = B44_DEF_TX_RING_PENDING;
2375
2376 dev->netdev_ops = &b44_netdev_ops;
2377 netif_napi_add(dev, &bp->napi, b44_poll, 64);
2378 dev->watchdog_timeo = B44_TX_TIMEOUT;
2379 dev->min_mtu = B44_MIN_MTU;
2380 dev->max_mtu = B44_MAX_MTU;
2381 dev->irq = sdev->irq;
2382 dev->ethtool_ops = &b44_ethtool_ops;
2383
2384 err = ssb_bus_powerup(sdev->bus, 0);
2385 if (err) {
2386 dev_err(sdev->dev,
2387 "Failed to powerup the bus\n");
2388 goto err_out_free_dev;
2389 }
2390
2391 if (dma_set_mask_and_coherent(sdev->dma_dev, DMA_BIT_MASK(30))) {
2392 dev_err(sdev->dev,
2393 "Required 30BIT DMA mask unsupported by the system\n");
2394 goto err_out_powerdown;
2395 }
2396
2397 err = b44_get_invariants(bp);
2398 if (err) {
2399 dev_err(sdev->dev,
2400 "Problem fetching invariants of chip, aborting\n");
2401 goto err_out_powerdown;
2402 }
2403
2404 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) {
2405 dev_err(sdev->dev, "No PHY present on this MAC, aborting\n");
2406 err = -ENODEV;
2407 goto err_out_powerdown;
2408 }
2409
2410 bp->mii_if.dev = dev;
2411 bp->mii_if.mdio_read = b44_mdio_read_mii;
2412 bp->mii_if.mdio_write = b44_mdio_write_mii;
2413 bp->mii_if.phy_id = bp->phy_addr;
2414 bp->mii_if.phy_id_mask = 0x1f;
2415 bp->mii_if.reg_num_mask = 0x1f;
2416
2417 /* By default, advertise all speed/duplex settings. */
2418 bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2419 B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2420
2421 /* By default, auto-negotiate PAUSE. */
2422 bp->flags |= B44_FLAG_PAUSE_AUTO;
2423
2424 err = register_netdev(dev);
2425 if (err) {
2426 dev_err(sdev->dev, "Cannot register net device, aborting\n");
2427 goto err_out_powerdown;
2428 }
2429
2430 netif_carrier_off(dev);
2431
2432 ssb_set_drvdata(sdev, dev);
2433
2434 /* Chip reset provides power to the b44 MAC & PCI cores, which
2435 * is necessary for MAC register access.
2436 */
2437 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
2438
2439 /* do a phy reset to test if there is an active phy */
2440 err = b44_phy_reset(bp);
2441 if (err < 0) {
2442 dev_err(sdev->dev, "phy reset failed\n");
2443 goto err_out_unregister_netdev;
2444 }
2445
2446 if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
2447 err = b44_register_phy_one(bp);
2448 if (err) {
2449 dev_err(sdev->dev, "Cannot register PHY, aborting\n");
2450 goto err_out_unregister_netdev;
2451 }
2452 }
2453
2454 device_set_wakeup_capable(sdev->dev, true);
2455 netdev_info(dev, "%s %pM\n", DRV_DESCRIPTION, dev->dev_addr);
2456
2457 return 0;
2458
2459 err_out_unregister_netdev:
2460 unregister_netdev(dev);
2461 err_out_powerdown:
2462 ssb_bus_may_powerdown(sdev->bus);
2463
2464 err_out_free_dev:
2465 netif_napi_del(&bp->napi);
2466 free_netdev(dev);
2467
2468 out:
2469 return err;
2470 }
2471
2472 static void b44_remove_one(struct ssb_device *sdev)
2473 {
2474 struct net_device *dev = ssb_get_drvdata(sdev);
2475 struct b44 *bp = netdev_priv(dev);
2476
2477 unregister_netdev(dev);
2478 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
2479 b44_unregister_phy_one(bp);
2480 ssb_device_disable(sdev, 0);
2481 ssb_bus_may_powerdown(sdev->bus);
2482 netif_napi_del(&bp->napi);
2483 free_netdev(dev);
2484 ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2485 ssb_set_drvdata(sdev, NULL);
2486 }
2487
2488 static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
2489 {
2490 struct net_device *dev = ssb_get_drvdata(sdev);
2491 struct b44 *bp = netdev_priv(dev);
2492
2493 if (!netif_running(dev))
2494 return 0;
2495
2496 del_timer_sync(&bp->timer);
2497
2498 spin_lock_irq(&bp->lock);
2499
2500 b44_halt(bp);
2501 netif_carrier_off(bp->dev);
2502 netif_device_detach(bp->dev);
2503 b44_free_rings(bp);
2504
2505 spin_unlock_irq(&bp->lock);
2506
2507 free_irq(dev->irq, dev);
2508 if (bp->flags & B44_FLAG_WOL_ENABLE) {
2509 b44_init_hw(bp, B44_PARTIAL_RESET);
2510 b44_setup_wol(bp);
2511 }
2512
2513 ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2514 return 0;
2515 }
2516
2517 static int b44_resume(struct ssb_device *sdev)
2518 {
2519 struct net_device *dev = ssb_get_drvdata(sdev);
2520 struct b44 *bp = netdev_priv(dev);
2521 int rc = 0;
2522
2523 rc = ssb_bus_powerup(sdev->bus, 0);
2524 if (rc) {
2525 dev_err(sdev->dev,
2526 "Failed to powerup the bus\n");
2527 return rc;
2528 }
2529
2530 if (!netif_running(dev))
2531 return 0;
2532
2533 spin_lock_irq(&bp->lock);
2534 b44_init_rings(bp);
2535 b44_init_hw(bp, B44_FULL_RESET);
2536 spin_unlock_irq(&bp->lock);
2537
2538 /*
2539 * As a shared interrupt, the handler can be called immediately. To be
2540 * able to check the interrupt status the hardware must already be
2541 * powered back on (b44_init_hw).
2542 */
2543 rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
2544 if (rc) {
2545 netdev_err(dev, "request_irq failed\n");
2546 spin_lock_irq(&bp->lock);
2547 b44_halt(bp);
2548 b44_free_rings(bp);
2549 spin_unlock_irq(&bp->lock);
2550 return rc;
2551 }
2552
2553 netif_device_attach(bp->dev);
2554
2555 b44_enable_ints(bp);
2556 netif_wake_queue(dev);
2557
2558 mod_timer(&bp->timer, jiffies + 1);
2559
2560 return 0;
2561 }
2562
2563 static struct ssb_driver b44_ssb_driver = {
2564 .name = DRV_MODULE_NAME,
2565 .id_table = b44_ssb_tbl,
2566 .probe = b44_init_one,
2567 .remove = b44_remove_one,
2568 .suspend = b44_suspend,
2569 .resume = b44_resume,
2570 };
2571
2572 static inline int __init b44_pci_init(void)
2573 {
2574 int err = 0;
2575 #ifdef CONFIG_B44_PCI
2576 err = ssb_pcihost_register(&b44_pci_driver);
2577 #endif
2578 return err;
2579 }
2580
2581 static inline void b44_pci_exit(void)
2582 {
2583 #ifdef CONFIG_B44_PCI
2584 ssb_pcihost_unregister(&b44_pci_driver);
2585 #endif
2586 }
2587
2588 static int __init b44_init(void)
2589 {
2590 unsigned int dma_desc_align_size = dma_get_cache_alignment();
2591 int err;
2592
2593 /* Setup paramaters for syncing RX/TX DMA descriptors */
2594 dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2595
2596 err = b44_pci_init();
2597 if (err)
2598 return err;
2599 err = ssb_driver_register(&b44_ssb_driver);
2600 if (err)
2601 b44_pci_exit();
2602 return err;
2603 }
2604
2605 static void __exit b44_cleanup(void)
2606 {
2607 ssb_driver_unregister(&b44_ssb_driver);
2608 b44_pci_exit();
2609 }
2610
2611 module_init(b44_init);
2612 module_exit(b44_cleanup);
2613
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