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_DESCRIPTION "Broadcom 44xx/47xx 10/100 PCI ethernet driver"
44
45 #define B44_DEF_MSG_ENABLE \
46 (NETIF_MSG_DRV | \
47 NETIF_MSG_PROBE | \
48 NETIF_MSG_LINK | \
49 NETIF_MSG_TIMER | \
50 NETIF_MSG_IFDOWN | \
51 NETIF_MSG_IFUP | \
52 NETIF_MSG_RX_ERR | \
53 NETIF_MSG_TX_ERR)
54
55 /* length of time before we decide the hardware is borked,
56 * and dev->tx_timeout() should be called to fix the problem
57 */
58 #define B44_TX_TIMEOUT (5 * HZ)
59
60 /* hardware minimum and maximum for a single frame's data payload */
61 #define B44_MIN_MTU ETH_ZLEN
62 #define B44_MAX_MTU ETH_DATA_LEN
63
64 #define B44_RX_RING_SIZE 512
65 #define B44_DEF_RX_RING_PENDING 200
66 #define B44_RX_RING_BYTES (sizeof(struct dma_desc) * \
67 B44_RX_RING_SIZE)
68 #define B44_TX_RING_SIZE 512
69 #define B44_DEF_TX_RING_PENDING (B44_TX_RING_SIZE - 1)
70 #define B44_TX_RING_BYTES (sizeof(struct dma_desc) * \
71 B44_TX_RING_SIZE)
72
73 #define TX_RING_GAP(BP) \
74 (B44_TX_RING_SIZE - (BP)->tx_pending)
75 #define TX_BUFFS_AVAIL(BP) \
76 (((BP)->tx_cons <= (BP)->tx_prod) ? \
77 (BP)->tx_cons + (BP)->tx_pending - (BP)->tx_prod : \
78 (BP)->tx_cons - (BP)->tx_prod - TX_RING_GAP(BP))
79 #define NEXT_TX(N) (((N) + 1) & (B44_TX_RING_SIZE - 1))
80
81 #define RX_PKT_OFFSET (RX_HEADER_LEN + 2)
82 #define RX_PKT_BUF_SZ (1536 + RX_PKT_OFFSET)
83
84 /* minimum number of free TX descriptors required to wake up TX process */
85 #define B44_TX_WAKEUP_THRESH (B44_TX_RING_SIZE / 4)
86
87 /* b44 internal pattern match filter info */
88 #define B44_PATTERN_BASE 0x400
89 #define B44_PATTERN_SIZE 0x80
90 #define B44_PMASK_BASE 0x600
91 #define B44_PMASK_SIZE 0x10
92 #define B44_MAX_PATTERNS 16
93 #define B44_ETHIPV6UDP_HLEN 62
94 #define B44_ETHIPV4UDP_HLEN 42
95
96 MODULE_AUTHOR("Felix Fietkau, Florian Schirmer, Pekka Pietikainen, David S. Miller");
97 MODULE_DESCRIPTION(DRV_DESCRIPTION);
98 MODULE_LICENSE("GPL");
99
100 static int b44_debug = -1; /* -1 == use B44_DEF_MSG_ENABLE as value */
101 module_param(b44_debug, int, 0);
102 MODULE_PARM_DESC(b44_debug, "B44 bitmapped debugging message enable value");
103
104
105 #ifdef CONFIG_B44_PCI
106 static const struct pci_device_id b44_pci_tbl[] = {
107 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401) },
108 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B0) },
109 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_BCM4401B1) },
110 { 0 } /* terminate list with empty entry */
111 };
112 MODULE_DEVICE_TABLE(pci, b44_pci_tbl);
113
114 static struct pci_driver b44_pci_driver = {
115 .name = DRV_MODULE_NAME,
116 .id_table = b44_pci_tbl,
117 };
118 #endif /* CONFIG_B44_PCI */
119
120 static const struct ssb_device_id b44_ssb_tbl[] = {
121 SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_ETHERNET, SSB_ANY_REV),
122 {},
123 };
124 MODULE_DEVICE_TABLE(ssb, b44_ssb_tbl);
125
126 static void b44_halt(struct b44 *);
127 static void b44_init_rings(struct b44 *);
128
129 #define B44_FULL_RESET 1
130 #define B44_FULL_RESET_SKIP_PHY 2
131 #define B44_PARTIAL_RESET 3
132 #define B44_CHIP_RESET_FULL 4
133 #define B44_CHIP_RESET_PARTIAL 5
134
135 static void b44_init_hw(struct b44 *, int);
136
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
b44_sync_dma_desc_for_device(struct ssb_device * sdev,dma_addr_t dma_base,unsigned long offset,enum dma_data_direction dir)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 dma_sync_single_for_device(sdev->dma_dev, dma_base + offset,
152 dma_desc_sync_size, dir);
153 }
154
b44_sync_dma_desc_for_cpu(struct ssb_device * sdev,dma_addr_t dma_base,unsigned long offset,enum dma_data_direction dir)155 static inline void b44_sync_dma_desc_for_cpu(struct ssb_device *sdev,
156 dma_addr_t dma_base,
157 unsigned long offset,
158 enum dma_data_direction dir)
159 {
160 dma_sync_single_for_cpu(sdev->dma_dev, dma_base + offset,
161 dma_desc_sync_size, dir);
162 }
163
br32(const struct b44 * bp,unsigned long reg)164 static inline unsigned long br32(const struct b44 *bp, unsigned long reg)
165 {
166 return ssb_read32(bp->sdev, reg);
167 }
168
bw32(const struct b44 * bp,unsigned long reg,unsigned long val)169 static inline void bw32(const struct b44 *bp,
170 unsigned long reg, unsigned long val)
171 {
172 ssb_write32(bp->sdev, reg, val);
173 }
174
b44_wait_bit(struct b44 * bp,unsigned long reg,u32 bit,unsigned long timeout,const int clear)175 static int b44_wait_bit(struct b44 *bp, unsigned long reg,
176 u32 bit, unsigned long timeout, const int clear)
177 {
178 unsigned long i;
179
180 for (i = 0; i < timeout; i++) {
181 u32 val = br32(bp, reg);
182
183 if (clear && !(val & bit))
184 break;
185 if (!clear && (val & bit))
186 break;
187 udelay(10);
188 }
189 if (i == timeout) {
190 if (net_ratelimit())
191 netdev_err(bp->dev, "BUG! Timeout waiting for bit %08x of register %lx to %s\n",
192 bit, reg, clear ? "clear" : "set");
193
194 return -ENODEV;
195 }
196 return 0;
197 }
198
__b44_cam_write(struct b44 * bp,const unsigned char * data,int index)199 static inline void __b44_cam_write(struct b44 *bp,
200 const unsigned char *data, int index)
201 {
202 u32 val;
203
204 val = ((u32) data[2]) << 24;
205 val |= ((u32) data[3]) << 16;
206 val |= ((u32) data[4]) << 8;
207 val |= ((u32) data[5]) << 0;
208 bw32(bp, B44_CAM_DATA_LO, val);
209 val = (CAM_DATA_HI_VALID |
210 (((u32) data[0]) << 8) |
211 (((u32) data[1]) << 0));
212 bw32(bp, B44_CAM_DATA_HI, val);
213 bw32(bp, B44_CAM_CTRL, (CAM_CTRL_WRITE |
214 (index << CAM_CTRL_INDEX_SHIFT)));
215 b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
216 }
217
__b44_disable_ints(struct b44 * bp)218 static inline void __b44_disable_ints(struct b44 *bp)
219 {
220 bw32(bp, B44_IMASK, 0);
221 }
222
b44_disable_ints(struct b44 * bp)223 static void b44_disable_ints(struct b44 *bp)
224 {
225 __b44_disable_ints(bp);
226
227 /* Flush posted writes. */
228 br32(bp, B44_IMASK);
229 }
230
b44_enable_ints(struct b44 * bp)231 static void b44_enable_ints(struct b44 *bp)
232 {
233 bw32(bp, B44_IMASK, bp->imask);
234 }
235
__b44_readphy(struct b44 * bp,int phy_addr,int reg,u32 * val)236 static int __b44_readphy(struct b44 *bp, int phy_addr, int reg, u32 *val)
237 {
238 int err;
239
240 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
241 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
242 (MDIO_OP_READ << MDIO_DATA_OP_SHIFT) |
243 (phy_addr << MDIO_DATA_PMD_SHIFT) |
244 (reg << MDIO_DATA_RA_SHIFT) |
245 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT)));
246 err = b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
247 *val = br32(bp, B44_MDIO_DATA) & MDIO_DATA_DATA;
248
249 return err;
250 }
251
__b44_writephy(struct b44 * bp,int phy_addr,int reg,u32 val)252 static int __b44_writephy(struct b44 *bp, int phy_addr, int reg, u32 val)
253 {
254 bw32(bp, B44_EMAC_ISTAT, EMAC_INT_MII);
255 bw32(bp, B44_MDIO_DATA, (MDIO_DATA_SB_START |
256 (MDIO_OP_WRITE << MDIO_DATA_OP_SHIFT) |
257 (phy_addr << MDIO_DATA_PMD_SHIFT) |
258 (reg << MDIO_DATA_RA_SHIFT) |
259 (MDIO_TA_VALID << MDIO_DATA_TA_SHIFT) |
260 (val & MDIO_DATA_DATA)));
261 return b44_wait_bit(bp, B44_EMAC_ISTAT, EMAC_INT_MII, 100, 0);
262 }
263
b44_readphy(struct b44 * bp,int reg,u32 * val)264 static inline int b44_readphy(struct b44 *bp, int reg, u32 *val)
265 {
266 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
267 return 0;
268
269 return __b44_readphy(bp, bp->phy_addr, reg, val);
270 }
271
b44_writephy(struct b44 * bp,int reg,u32 val)272 static inline int b44_writephy(struct b44 *bp, int reg, u32 val)
273 {
274 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
275 return 0;
276
277 return __b44_writephy(bp, bp->phy_addr, reg, val);
278 }
279
280 /* miilib interface */
b44_mdio_read_mii(struct net_device * dev,int phy_id,int location)281 static int b44_mdio_read_mii(struct net_device *dev, int phy_id, int location)
282 {
283 u32 val;
284 struct b44 *bp = netdev_priv(dev);
285 int rc = __b44_readphy(bp, phy_id, location, &val);
286 if (rc)
287 return 0xffffffff;
288 return val;
289 }
290
b44_mdio_write_mii(struct net_device * dev,int phy_id,int location,int val)291 static void b44_mdio_write_mii(struct net_device *dev, int phy_id, int location,
292 int val)
293 {
294 struct b44 *bp = netdev_priv(dev);
295 __b44_writephy(bp, phy_id, location, val);
296 }
297
b44_mdio_read_phylib(struct mii_bus * bus,int phy_id,int location)298 static int b44_mdio_read_phylib(struct mii_bus *bus, int phy_id, int location)
299 {
300 u32 val;
301 struct b44 *bp = bus->priv;
302 int rc = __b44_readphy(bp, phy_id, location, &val);
303 if (rc)
304 return 0xffffffff;
305 return val;
306 }
307
b44_mdio_write_phylib(struct mii_bus * bus,int phy_id,int location,u16 val)308 static int b44_mdio_write_phylib(struct mii_bus *bus, int phy_id, int location,
309 u16 val)
310 {
311 struct b44 *bp = bus->priv;
312 return __b44_writephy(bp, phy_id, location, val);
313 }
314
b44_phy_reset(struct b44 * bp)315 static int b44_phy_reset(struct b44 *bp)
316 {
317 u32 val;
318 int err;
319
320 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
321 return 0;
322 err = b44_writephy(bp, MII_BMCR, BMCR_RESET);
323 if (err)
324 return err;
325 udelay(100);
326 err = b44_readphy(bp, MII_BMCR, &val);
327 if (!err) {
328 if (val & BMCR_RESET) {
329 netdev_err(bp->dev, "PHY Reset would not complete\n");
330 err = -ENODEV;
331 }
332 }
333
334 return err;
335 }
336
__b44_set_flow_ctrl(struct b44 * bp,u32 pause_flags)337 static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags)
338 {
339 u32 val;
340
341 bp->flags &= ~(B44_FLAG_TX_PAUSE | B44_FLAG_RX_PAUSE);
342 bp->flags |= pause_flags;
343
344 val = br32(bp, B44_RXCONFIG);
345 if (pause_flags & B44_FLAG_RX_PAUSE)
346 val |= RXCONFIG_FLOW;
347 else
348 val &= ~RXCONFIG_FLOW;
349 bw32(bp, B44_RXCONFIG, val);
350
351 val = br32(bp, B44_MAC_FLOW);
352 if (pause_flags & B44_FLAG_TX_PAUSE)
353 val |= (MAC_FLOW_PAUSE_ENAB |
354 (0xc0 & MAC_FLOW_RX_HI_WATER));
355 else
356 val &= ~MAC_FLOW_PAUSE_ENAB;
357 bw32(bp, B44_MAC_FLOW, val);
358 }
359
b44_set_flow_ctrl(struct b44 * bp,u32 local,u32 remote)360 static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote)
361 {
362 u32 pause_enab = 0;
363
364 /* The driver supports only rx pause by default because
365 the b44 mac tx pause mechanism generates excessive
366 pause frames.
367 Use ethtool to turn on b44 tx pause if necessary.
368 */
369 if ((local & ADVERTISE_PAUSE_CAP) &&
370 (local & ADVERTISE_PAUSE_ASYM)){
371 if ((remote & LPA_PAUSE_ASYM) &&
372 !(remote & LPA_PAUSE_CAP))
373 pause_enab |= B44_FLAG_RX_PAUSE;
374 }
375
376 __b44_set_flow_ctrl(bp, pause_enab);
377 }
378
379 #ifdef CONFIG_BCM47XX
380 #include <linux/bcm47xx_nvram.h>
b44_wap54g10_workaround(struct b44 * bp)381 static void b44_wap54g10_workaround(struct b44 *bp)
382 {
383 char buf[20];
384 u32 val;
385 int err;
386
387 /*
388 * workaround for bad hardware design in Linksys WAP54G v1.0
389 * see https://dev.openwrt.org/ticket/146
390 * check and reset bit "isolate"
391 */
392 if (bcm47xx_nvram_getenv("boardnum", buf, sizeof(buf)) < 0)
393 return;
394 if (simple_strtoul(buf, NULL, 0) == 2) {
395 err = __b44_readphy(bp, 0, MII_BMCR, &val);
396 if (err)
397 goto error;
398 if (!(val & BMCR_ISOLATE))
399 return;
400 val &= ~BMCR_ISOLATE;
401 err = __b44_writephy(bp, 0, MII_BMCR, val);
402 if (err)
403 goto error;
404 }
405 return;
406 error:
407 pr_warn("PHY: cannot reset MII transceiver isolate bit\n");
408 }
409 #else
b44_wap54g10_workaround(struct b44 * bp)410 static inline void b44_wap54g10_workaround(struct b44 *bp)
411 {
412 }
413 #endif
414
b44_setup_phy(struct b44 * bp)415 static int b44_setup_phy(struct b44 *bp)
416 {
417 u32 val;
418 int err;
419
420 b44_wap54g10_workaround(bp);
421
422 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
423 return 0;
424 if ((err = b44_readphy(bp, B44_MII_ALEDCTRL, &val)) != 0)
425 goto out;
426 if ((err = b44_writephy(bp, B44_MII_ALEDCTRL,
427 val & MII_ALEDCTRL_ALLMSK)) != 0)
428 goto out;
429 if ((err = b44_readphy(bp, B44_MII_TLEDCTRL, &val)) != 0)
430 goto out;
431 if ((err = b44_writephy(bp, B44_MII_TLEDCTRL,
432 val | MII_TLEDCTRL_ENABLE)) != 0)
433 goto out;
434
435 if (!(bp->flags & B44_FLAG_FORCE_LINK)) {
436 u32 adv = ADVERTISE_CSMA;
437
438 if (bp->flags & B44_FLAG_ADV_10HALF)
439 adv |= ADVERTISE_10HALF;
440 if (bp->flags & B44_FLAG_ADV_10FULL)
441 adv |= ADVERTISE_10FULL;
442 if (bp->flags & B44_FLAG_ADV_100HALF)
443 adv |= ADVERTISE_100HALF;
444 if (bp->flags & B44_FLAG_ADV_100FULL)
445 adv |= ADVERTISE_100FULL;
446
447 if (bp->flags & B44_FLAG_PAUSE_AUTO)
448 adv |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
449
450 if ((err = b44_writephy(bp, MII_ADVERTISE, adv)) != 0)
451 goto out;
452 if ((err = b44_writephy(bp, MII_BMCR, (BMCR_ANENABLE |
453 BMCR_ANRESTART))) != 0)
454 goto out;
455 } else {
456 u32 bmcr;
457
458 if ((err = b44_readphy(bp, MII_BMCR, &bmcr)) != 0)
459 goto out;
460 bmcr &= ~(BMCR_FULLDPLX | BMCR_ANENABLE | BMCR_SPEED100);
461 if (bp->flags & B44_FLAG_100_BASE_T)
462 bmcr |= BMCR_SPEED100;
463 if (bp->flags & B44_FLAG_FULL_DUPLEX)
464 bmcr |= BMCR_FULLDPLX;
465 if ((err = b44_writephy(bp, MII_BMCR, bmcr)) != 0)
466 goto out;
467
468 /* Since we will not be negotiating there is no safe way
469 * to determine if the link partner supports flow control
470 * or not. So just disable it completely in this case.
471 */
472 b44_set_flow_ctrl(bp, 0, 0);
473 }
474
475 out:
476 return err;
477 }
478
b44_stats_update(struct b44 * bp)479 static void b44_stats_update(struct b44 *bp)
480 {
481 unsigned long reg;
482 u64 *val;
483
484 val = &bp->hw_stats.tx_good_octets;
485 u64_stats_update_begin(&bp->hw_stats.syncp);
486
487 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL) {
488 *val++ += br32(bp, reg);
489 }
490
491 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL) {
492 *val++ += br32(bp, reg);
493 }
494
495 u64_stats_update_end(&bp->hw_stats.syncp);
496 }
497
b44_link_report(struct b44 * bp)498 static void b44_link_report(struct b44 *bp)
499 {
500 if (!netif_carrier_ok(bp->dev)) {
501 netdev_info(bp->dev, "Link is down\n");
502 } else {
503 netdev_info(bp->dev, "Link is up at %d Mbps, %s duplex\n",
504 (bp->flags & B44_FLAG_100_BASE_T) ? 100 : 10,
505 (bp->flags & B44_FLAG_FULL_DUPLEX) ? "full" : "half");
506
507 netdev_info(bp->dev, "Flow control is %s for TX and %s for RX\n",
508 (bp->flags & B44_FLAG_TX_PAUSE) ? "on" : "off",
509 (bp->flags & B44_FLAG_RX_PAUSE) ? "on" : "off");
510 }
511 }
512
b44_check_phy(struct b44 * bp)513 static void b44_check_phy(struct b44 *bp)
514 {
515 u32 bmsr, aux;
516
517 if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
518 bp->flags |= B44_FLAG_100_BASE_T;
519 if (!netif_carrier_ok(bp->dev)) {
520 u32 val = br32(bp, B44_TX_CTRL);
521 if (bp->flags & B44_FLAG_FULL_DUPLEX)
522 val |= TX_CTRL_DUPLEX;
523 else
524 val &= ~TX_CTRL_DUPLEX;
525 bw32(bp, B44_TX_CTRL, val);
526 netif_carrier_on(bp->dev);
527 b44_link_report(bp);
528 }
529 return;
530 }
531
532 if (!b44_readphy(bp, MII_BMSR, &bmsr) &&
533 !b44_readphy(bp, B44_MII_AUXCTRL, &aux) &&
534 (bmsr != 0xffff)) {
535 if (aux & MII_AUXCTRL_SPEED)
536 bp->flags |= B44_FLAG_100_BASE_T;
537 else
538 bp->flags &= ~B44_FLAG_100_BASE_T;
539 if (aux & MII_AUXCTRL_DUPLEX)
540 bp->flags |= B44_FLAG_FULL_DUPLEX;
541 else
542 bp->flags &= ~B44_FLAG_FULL_DUPLEX;
543
544 if (!netif_carrier_ok(bp->dev) &&
545 (bmsr & BMSR_LSTATUS)) {
546 u32 val = br32(bp, B44_TX_CTRL);
547 u32 local_adv, remote_adv;
548
549 if (bp->flags & B44_FLAG_FULL_DUPLEX)
550 val |= TX_CTRL_DUPLEX;
551 else
552 val &= ~TX_CTRL_DUPLEX;
553 bw32(bp, B44_TX_CTRL, val);
554
555 if (!(bp->flags & B44_FLAG_FORCE_LINK) &&
556 !b44_readphy(bp, MII_ADVERTISE, &local_adv) &&
557 !b44_readphy(bp, MII_LPA, &remote_adv))
558 b44_set_flow_ctrl(bp, local_adv, remote_adv);
559
560 /* Link now up */
561 netif_carrier_on(bp->dev);
562 b44_link_report(bp);
563 } else if (netif_carrier_ok(bp->dev) && !(bmsr & BMSR_LSTATUS)) {
564 /* Link now down */
565 netif_carrier_off(bp->dev);
566 b44_link_report(bp);
567 }
568
569 if (bmsr & BMSR_RFAULT)
570 netdev_warn(bp->dev, "Remote fault detected in PHY\n");
571 if (bmsr & BMSR_JCD)
572 netdev_warn(bp->dev, "Jabber detected in PHY\n");
573 }
574 }
575
b44_timer(struct timer_list * t)576 static void b44_timer(struct timer_list *t)
577 {
578 struct b44 *bp = from_timer(bp, t, timer);
579
580 spin_lock_irq(&bp->lock);
581
582 b44_check_phy(bp);
583
584 b44_stats_update(bp);
585
586 spin_unlock_irq(&bp->lock);
587
588 mod_timer(&bp->timer, round_jiffies(jiffies + HZ));
589 }
590
b44_tx(struct b44 * bp)591 static void b44_tx(struct b44 *bp)
592 {
593 u32 cur, cons;
594 unsigned bytes_compl = 0, pkts_compl = 0;
595
596 cur = br32(bp, B44_DMATX_STAT) & DMATX_STAT_CDMASK;
597 cur /= sizeof(struct dma_desc);
598
599 /* XXX needs updating when NETIF_F_SG is supported */
600 for (cons = bp->tx_cons; cons != cur; cons = NEXT_TX(cons)) {
601 struct ring_info *rp = &bp->tx_buffers[cons];
602 struct sk_buff *skb = rp->skb;
603
604 BUG_ON(skb == NULL);
605
606 dma_unmap_single(bp->sdev->dma_dev,
607 rp->mapping,
608 skb->len,
609 DMA_TO_DEVICE);
610 rp->skb = NULL;
611
612 bytes_compl += skb->len;
613 pkts_compl++;
614
615 dev_consume_skb_irq(skb);
616 }
617
618 netdev_completed_queue(bp->dev, pkts_compl, bytes_compl);
619 bp->tx_cons = cons;
620 if (netif_queue_stopped(bp->dev) &&
621 TX_BUFFS_AVAIL(bp) > B44_TX_WAKEUP_THRESH)
622 netif_wake_queue(bp->dev);
623
624 bw32(bp, B44_GPTIMER, 0);
625 }
626
627 /* Works like this. This chip writes a 'struct rx_header" 30 bytes
628 * before the DMA address you give it. So we allocate 30 more bytes
629 * for the RX buffer, DMA map all of it, skb_reserve the 30 bytes, then
630 * point the chip at 30 bytes past where the rx_header will go.
631 */
b44_alloc_rx_skb(struct b44 * bp,int src_idx,u32 dest_idx_unmasked)632 static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
633 {
634 struct dma_desc *dp;
635 struct ring_info *src_map, *map;
636 struct rx_header *rh;
637 struct sk_buff *skb;
638 dma_addr_t mapping;
639 int dest_idx;
640 u32 ctrl;
641
642 src_map = NULL;
643 if (src_idx >= 0)
644 src_map = &bp->rx_buffers[src_idx];
645 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
646 map = &bp->rx_buffers[dest_idx];
647 skb = netdev_alloc_skb(bp->dev, RX_PKT_BUF_SZ);
648 if (skb == NULL)
649 return -ENOMEM;
650
651 mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
652 RX_PKT_BUF_SZ,
653 DMA_FROM_DEVICE);
654
655 /* Hardware bug work-around, the chip is unable to do PCI DMA
656 to/from anything above 1GB :-( */
657 if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
658 mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
659 /* Sigh... */
660 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
661 dma_unmap_single(bp->sdev->dma_dev, mapping,
662 RX_PKT_BUF_SZ, DMA_FROM_DEVICE);
663 dev_kfree_skb_any(skb);
664 skb = alloc_skb(RX_PKT_BUF_SZ, GFP_ATOMIC | GFP_DMA);
665 if (skb == NULL)
666 return -ENOMEM;
667 mapping = dma_map_single(bp->sdev->dma_dev, skb->data,
668 RX_PKT_BUF_SZ,
669 DMA_FROM_DEVICE);
670 if (dma_mapping_error(bp->sdev->dma_dev, mapping) ||
671 mapping + RX_PKT_BUF_SZ > DMA_BIT_MASK(30)) {
672 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
673 dma_unmap_single(bp->sdev->dma_dev, mapping, RX_PKT_BUF_SZ,DMA_FROM_DEVICE);
674 dev_kfree_skb_any(skb);
675 return -ENOMEM;
676 }
677 bp->force_copybreak = 1;
678 }
679
680 rh = (struct rx_header *) skb->data;
681
682 rh->len = 0;
683 rh->flags = 0;
684
685 map->skb = skb;
686 map->mapping = mapping;
687
688 if (src_map != NULL)
689 src_map->skb = NULL;
690
691 ctrl = (DESC_CTRL_LEN & RX_PKT_BUF_SZ);
692 if (dest_idx == (B44_RX_RING_SIZE - 1))
693 ctrl |= DESC_CTRL_EOT;
694
695 dp = &bp->rx_ring[dest_idx];
696 dp->ctrl = cpu_to_le32(ctrl);
697 dp->addr = cpu_to_le32((u32) mapping + bp->dma_offset);
698
699 if (bp->flags & B44_FLAG_RX_RING_HACK)
700 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
701 dest_idx * sizeof(*dp),
702 DMA_BIDIRECTIONAL);
703
704 return RX_PKT_BUF_SZ;
705 }
706
b44_recycle_rx(struct b44 * bp,int src_idx,u32 dest_idx_unmasked)707 static void b44_recycle_rx(struct b44 *bp, int src_idx, u32 dest_idx_unmasked)
708 {
709 struct dma_desc *src_desc, *dest_desc;
710 struct ring_info *src_map, *dest_map;
711 struct rx_header *rh;
712 int dest_idx;
713 __le32 ctrl;
714
715 dest_idx = dest_idx_unmasked & (B44_RX_RING_SIZE - 1);
716 dest_desc = &bp->rx_ring[dest_idx];
717 dest_map = &bp->rx_buffers[dest_idx];
718 src_desc = &bp->rx_ring[src_idx];
719 src_map = &bp->rx_buffers[src_idx];
720
721 dest_map->skb = src_map->skb;
722 rh = (struct rx_header *) src_map->skb->data;
723 rh->len = 0;
724 rh->flags = 0;
725 dest_map->mapping = src_map->mapping;
726
727 if (bp->flags & B44_FLAG_RX_RING_HACK)
728 b44_sync_dma_desc_for_cpu(bp->sdev, bp->rx_ring_dma,
729 src_idx * sizeof(*src_desc),
730 DMA_BIDIRECTIONAL);
731
732 ctrl = src_desc->ctrl;
733 if (dest_idx == (B44_RX_RING_SIZE - 1))
734 ctrl |= cpu_to_le32(DESC_CTRL_EOT);
735 else
736 ctrl &= cpu_to_le32(~DESC_CTRL_EOT);
737
738 dest_desc->ctrl = ctrl;
739 dest_desc->addr = src_desc->addr;
740
741 src_map->skb = NULL;
742
743 if (bp->flags & B44_FLAG_RX_RING_HACK)
744 b44_sync_dma_desc_for_device(bp->sdev, bp->rx_ring_dma,
745 dest_idx * sizeof(*dest_desc),
746 DMA_BIDIRECTIONAL);
747
748 dma_sync_single_for_device(bp->sdev->dma_dev, dest_map->mapping,
749 RX_PKT_BUF_SZ,
750 DMA_FROM_DEVICE);
751 }
752
b44_rx(struct b44 * bp,int budget)753 static int b44_rx(struct b44 *bp, int budget)
754 {
755 int received;
756 u32 cons, prod;
757
758 received = 0;
759 prod = br32(bp, B44_DMARX_STAT) & DMARX_STAT_CDMASK;
760 prod /= sizeof(struct dma_desc);
761 cons = bp->rx_cons;
762
763 while (cons != prod && budget > 0) {
764 struct ring_info *rp = &bp->rx_buffers[cons];
765 struct sk_buff *skb = rp->skb;
766 dma_addr_t map = rp->mapping;
767 struct rx_header *rh;
768 u16 len;
769
770 dma_sync_single_for_cpu(bp->sdev->dma_dev, map,
771 RX_PKT_BUF_SZ,
772 DMA_FROM_DEVICE);
773 rh = (struct rx_header *) skb->data;
774 len = le16_to_cpu(rh->len);
775 if ((len > (RX_PKT_BUF_SZ - RX_PKT_OFFSET)) ||
776 (rh->flags & cpu_to_le16(RX_FLAG_ERRORS))) {
777 drop_it:
778 b44_recycle_rx(bp, cons, bp->rx_prod);
779 drop_it_no_recycle:
780 bp->dev->stats.rx_dropped++;
781 goto next_pkt;
782 }
783
784 if (len == 0) {
785 int i = 0;
786
787 do {
788 udelay(2);
789 barrier();
790 len = le16_to_cpu(rh->len);
791 } while (len == 0 && i++ < 5);
792 if (len == 0)
793 goto drop_it;
794 }
795
796 /* Omit CRC. */
797 len -= 4;
798
799 if (!bp->force_copybreak && len > RX_COPY_THRESHOLD) {
800 int skb_size;
801 skb_size = b44_alloc_rx_skb(bp, cons, bp->rx_prod);
802 if (skb_size < 0)
803 goto drop_it;
804 dma_unmap_single(bp->sdev->dma_dev, map,
805 skb_size, DMA_FROM_DEVICE);
806 /* Leave out rx_header */
807 skb_put(skb, len + RX_PKT_OFFSET);
808 skb_pull(skb, RX_PKT_OFFSET);
809 } else {
810 struct sk_buff *copy_skb;
811
812 b44_recycle_rx(bp, cons, bp->rx_prod);
813 copy_skb = napi_alloc_skb(&bp->napi, len);
814 if (copy_skb == NULL)
815 goto drop_it_no_recycle;
816
817 skb_put(copy_skb, len);
818 /* DMA sync done above, copy just the actual packet */
819 skb_copy_from_linear_data_offset(skb, RX_PKT_OFFSET,
820 copy_skb->data, len);
821 skb = copy_skb;
822 }
823 skb_checksum_none_assert(skb);
824 skb->protocol = eth_type_trans(skb, bp->dev);
825 netif_receive_skb(skb);
826 received++;
827 budget--;
828 next_pkt:
829 bp->rx_prod = (bp->rx_prod + 1) &
830 (B44_RX_RING_SIZE - 1);
831 cons = (cons + 1) & (B44_RX_RING_SIZE - 1);
832 }
833
834 bp->rx_cons = cons;
835 bw32(bp, B44_DMARX_PTR, cons * sizeof(struct dma_desc));
836
837 return received;
838 }
839
b44_poll(struct napi_struct * napi,int budget)840 static int b44_poll(struct napi_struct *napi, int budget)
841 {
842 struct b44 *bp = container_of(napi, struct b44, napi);
843 int work_done;
844 unsigned long flags;
845
846 spin_lock_irqsave(&bp->lock, flags);
847
848 if (bp->istat & (ISTAT_TX | ISTAT_TO)) {
849 /* spin_lock(&bp->tx_lock); */
850 b44_tx(bp);
851 /* spin_unlock(&bp->tx_lock); */
852 }
853 if (bp->istat & ISTAT_RFO) { /* fast recovery, in ~20msec */
854 bp->istat &= ~ISTAT_RFO;
855 b44_disable_ints(bp);
856 ssb_device_enable(bp->sdev, 0); /* resets ISTAT_RFO */
857 b44_init_rings(bp);
858 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
859 netif_wake_queue(bp->dev);
860 }
861
862 spin_unlock_irqrestore(&bp->lock, flags);
863
864 work_done = 0;
865 if (bp->istat & ISTAT_RX)
866 work_done += b44_rx(bp, budget);
867
868 if (bp->istat & ISTAT_ERRORS) {
869 spin_lock_irqsave(&bp->lock, flags);
870 b44_halt(bp);
871 b44_init_rings(bp);
872 b44_init_hw(bp, B44_FULL_RESET_SKIP_PHY);
873 netif_wake_queue(bp->dev);
874 spin_unlock_irqrestore(&bp->lock, flags);
875 work_done = 0;
876 }
877
878 if (work_done < budget) {
879 napi_complete_done(napi, work_done);
880 b44_enable_ints(bp);
881 }
882
883 return work_done;
884 }
885
b44_interrupt(int irq,void * dev_id)886 static irqreturn_t b44_interrupt(int irq, void *dev_id)
887 {
888 struct net_device *dev = dev_id;
889 struct b44 *bp = netdev_priv(dev);
890 u32 istat, imask;
891 int handled = 0;
892
893 spin_lock(&bp->lock);
894
895 istat = br32(bp, B44_ISTAT);
896 imask = br32(bp, B44_IMASK);
897
898 /* The interrupt mask register controls which interrupt bits
899 * will actually raise an interrupt to the CPU when set by hw/firmware,
900 * but doesn't mask off the bits.
901 */
902 istat &= imask;
903 if (istat) {
904 handled = 1;
905
906 if (unlikely(!netif_running(dev))) {
907 netdev_info(dev, "late interrupt\n");
908 goto irq_ack;
909 }
910
911 if (napi_schedule_prep(&bp->napi)) {
912 /* NOTE: These writes are posted by the readback of
913 * the ISTAT register below.
914 */
915 bp->istat = istat;
916 __b44_disable_ints(bp);
917 __napi_schedule(&bp->napi);
918 }
919
920 irq_ack:
921 bw32(bp, B44_ISTAT, istat);
922 br32(bp, B44_ISTAT);
923 }
924 spin_unlock(&bp->lock);
925 return IRQ_RETVAL(handled);
926 }
927
b44_tx_timeout(struct net_device * dev,unsigned int txqueue)928 static void b44_tx_timeout(struct net_device *dev, unsigned int txqueue)
929 {
930 struct b44 *bp = netdev_priv(dev);
931
932 netdev_err(dev, "transmit timed out, resetting\n");
933
934 spin_lock_irq(&bp->lock);
935
936 b44_halt(bp);
937 b44_init_rings(bp);
938 b44_init_hw(bp, B44_FULL_RESET);
939
940 spin_unlock_irq(&bp->lock);
941
942 b44_enable_ints(bp);
943
944 netif_wake_queue(dev);
945 }
946
b44_start_xmit(struct sk_buff * skb,struct net_device * dev)947 static netdev_tx_t b44_start_xmit(struct sk_buff *skb, struct net_device *dev)
948 {
949 struct b44 *bp = netdev_priv(dev);
950 int rc = NETDEV_TX_OK;
951 dma_addr_t mapping;
952 u32 len, entry, ctrl;
953 unsigned long flags;
954
955 len = skb->len;
956 spin_lock_irqsave(&bp->lock, flags);
957
958 /* This is a hard error, log it. */
959 if (unlikely(TX_BUFFS_AVAIL(bp) < 1)) {
960 netif_stop_queue(dev);
961 netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
962 goto err_out;
963 }
964
965 mapping = dma_map_single(bp->sdev->dma_dev, skb->data, len, DMA_TO_DEVICE);
966 if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
967 struct sk_buff *bounce_skb;
968
969 /* Chip can't handle DMA to/from >1GB, use bounce buffer */
970 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
971 dma_unmap_single(bp->sdev->dma_dev, mapping, len,
972 DMA_TO_DEVICE);
973
974 bounce_skb = alloc_skb(len, GFP_ATOMIC | GFP_DMA);
975 if (!bounce_skb)
976 goto err_out;
977
978 mapping = dma_map_single(bp->sdev->dma_dev, bounce_skb->data,
979 len, DMA_TO_DEVICE);
980 if (dma_mapping_error(bp->sdev->dma_dev, mapping) || mapping + len > DMA_BIT_MASK(30)) {
981 if (!dma_mapping_error(bp->sdev->dma_dev, mapping))
982 dma_unmap_single(bp->sdev->dma_dev, mapping,
983 len, DMA_TO_DEVICE);
984 dev_kfree_skb_any(bounce_skb);
985 goto err_out;
986 }
987
988 skb_copy_from_linear_data(skb, skb_put(bounce_skb, len), len);
989 dev_consume_skb_any(skb);
990 skb = bounce_skb;
991 }
992
993 entry = bp->tx_prod;
994 bp->tx_buffers[entry].skb = skb;
995 bp->tx_buffers[entry].mapping = mapping;
996
997 ctrl = (len & DESC_CTRL_LEN);
998 ctrl |= DESC_CTRL_IOC | DESC_CTRL_SOF | DESC_CTRL_EOF;
999 if (entry == (B44_TX_RING_SIZE - 1))
1000 ctrl |= DESC_CTRL_EOT;
1001
1002 bp->tx_ring[entry].ctrl = cpu_to_le32(ctrl);
1003 bp->tx_ring[entry].addr = cpu_to_le32((u32) mapping+bp->dma_offset);
1004
1005 if (bp->flags & B44_FLAG_TX_RING_HACK)
1006 b44_sync_dma_desc_for_device(bp->sdev, bp->tx_ring_dma,
1007 entry * sizeof(bp->tx_ring[0]),
1008 DMA_TO_DEVICE);
1009
1010 entry = NEXT_TX(entry);
1011
1012 bp->tx_prod = entry;
1013
1014 wmb();
1015
1016 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1017 if (bp->flags & B44_FLAG_BUGGY_TXPTR)
1018 bw32(bp, B44_DMATX_PTR, entry * sizeof(struct dma_desc));
1019 if (bp->flags & B44_FLAG_REORDER_BUG)
1020 br32(bp, B44_DMATX_PTR);
1021
1022 netdev_sent_queue(dev, skb->len);
1023
1024 if (TX_BUFFS_AVAIL(bp) < 1)
1025 netif_stop_queue(dev);
1026
1027 out_unlock:
1028 spin_unlock_irqrestore(&bp->lock, flags);
1029
1030 return rc;
1031
1032 err_out:
1033 rc = NETDEV_TX_BUSY;
1034 goto out_unlock;
1035 }
1036
b44_change_mtu(struct net_device * dev,int new_mtu)1037 static int b44_change_mtu(struct net_device *dev, int new_mtu)
1038 {
1039 struct b44 *bp = netdev_priv(dev);
1040
1041 if (!netif_running(dev)) {
1042 /* We'll just catch it later when the
1043 * device is up'd.
1044 */
1045 dev->mtu = new_mtu;
1046 return 0;
1047 }
1048
1049 spin_lock_irq(&bp->lock);
1050 b44_halt(bp);
1051 dev->mtu = new_mtu;
1052 b44_init_rings(bp);
1053 b44_init_hw(bp, B44_FULL_RESET);
1054 spin_unlock_irq(&bp->lock);
1055
1056 b44_enable_ints(bp);
1057
1058 return 0;
1059 }
1060
1061 /* Free up pending packets in all rx/tx rings.
1062 *
1063 * The chip has been shut down and the driver detached from
1064 * the networking, so no interrupts or new tx packets will
1065 * end up in the driver. bp->lock is not held and we are not
1066 * in an interrupt context and thus may sleep.
1067 */
b44_free_rings(struct b44 * bp)1068 static void b44_free_rings(struct b44 *bp)
1069 {
1070 struct ring_info *rp;
1071 int i;
1072
1073 for (i = 0; i < B44_RX_RING_SIZE; i++) {
1074 rp = &bp->rx_buffers[i];
1075
1076 if (rp->skb == NULL)
1077 continue;
1078 dma_unmap_single(bp->sdev->dma_dev, rp->mapping, RX_PKT_BUF_SZ,
1079 DMA_FROM_DEVICE);
1080 dev_kfree_skb_any(rp->skb);
1081 rp->skb = NULL;
1082 }
1083
1084 /* XXX needs changes once NETIF_F_SG is set... */
1085 for (i = 0; i < B44_TX_RING_SIZE; i++) {
1086 rp = &bp->tx_buffers[i];
1087
1088 if (rp->skb == NULL)
1089 continue;
1090 dma_unmap_single(bp->sdev->dma_dev, rp->mapping, rp->skb->len,
1091 DMA_TO_DEVICE);
1092 dev_kfree_skb_any(rp->skb);
1093 rp->skb = NULL;
1094 }
1095 }
1096
1097 /* Initialize tx/rx rings for packet processing.
1098 *
1099 * The chip has been shut down and the driver detached from
1100 * the networking, so no interrupts or new tx packets will
1101 * end up in the driver.
1102 */
b44_init_rings(struct b44 * bp)1103 static void b44_init_rings(struct b44 *bp)
1104 {
1105 int i;
1106
1107 b44_free_rings(bp);
1108
1109 memset(bp->rx_ring, 0, B44_RX_RING_BYTES);
1110 memset(bp->tx_ring, 0, B44_TX_RING_BYTES);
1111
1112 if (bp->flags & B44_FLAG_RX_RING_HACK)
1113 dma_sync_single_for_device(bp->sdev->dma_dev, bp->rx_ring_dma,
1114 DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
1115
1116 if (bp->flags & B44_FLAG_TX_RING_HACK)
1117 dma_sync_single_for_device(bp->sdev->dma_dev, bp->tx_ring_dma,
1118 DMA_TABLE_BYTES, DMA_TO_DEVICE);
1119
1120 for (i = 0; i < bp->rx_pending; i++) {
1121 if (b44_alloc_rx_skb(bp, -1, i) < 0)
1122 break;
1123 }
1124 }
1125
1126 /*
1127 * Must not be invoked with interrupt sources disabled and
1128 * the hardware shutdown down.
1129 */
b44_free_consistent(struct b44 * bp)1130 static void b44_free_consistent(struct b44 *bp)
1131 {
1132 kfree(bp->rx_buffers);
1133 bp->rx_buffers = NULL;
1134 kfree(bp->tx_buffers);
1135 bp->tx_buffers = NULL;
1136 if (bp->rx_ring) {
1137 if (bp->flags & B44_FLAG_RX_RING_HACK) {
1138 dma_unmap_single(bp->sdev->dma_dev, bp->rx_ring_dma,
1139 DMA_TABLE_BYTES, DMA_BIDIRECTIONAL);
1140 kfree(bp->rx_ring);
1141 } else
1142 dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
1143 bp->rx_ring, bp->rx_ring_dma);
1144 bp->rx_ring = NULL;
1145 bp->flags &= ~B44_FLAG_RX_RING_HACK;
1146 }
1147 if (bp->tx_ring) {
1148 if (bp->flags & B44_FLAG_TX_RING_HACK) {
1149 dma_unmap_single(bp->sdev->dma_dev, bp->tx_ring_dma,
1150 DMA_TABLE_BYTES, DMA_TO_DEVICE);
1151 kfree(bp->tx_ring);
1152 } else
1153 dma_free_coherent(bp->sdev->dma_dev, DMA_TABLE_BYTES,
1154 bp->tx_ring, bp->tx_ring_dma);
1155 bp->tx_ring = NULL;
1156 bp->flags &= ~B44_FLAG_TX_RING_HACK;
1157 }
1158 }
1159
1160 /*
1161 * Must not be invoked with interrupt sources disabled and
1162 * the hardware shutdown down. Can sleep.
1163 */
b44_alloc_consistent(struct b44 * bp,gfp_t gfp)1164 static int b44_alloc_consistent(struct b44 *bp, gfp_t gfp)
1165 {
1166 int size;
1167
1168 size = B44_RX_RING_SIZE * sizeof(struct ring_info);
1169 bp->rx_buffers = kzalloc(size, gfp);
1170 if (!bp->rx_buffers)
1171 goto out_err;
1172
1173 size = B44_TX_RING_SIZE * sizeof(struct ring_info);
1174 bp->tx_buffers = kzalloc(size, gfp);
1175 if (!bp->tx_buffers)
1176 goto out_err;
1177
1178 size = DMA_TABLE_BYTES;
1179 bp->rx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
1180 &bp->rx_ring_dma, gfp);
1181 if (!bp->rx_ring) {
1182 /* Allocation may have failed due to dma_alloc_coherent
1183 insisting on use of GFP_DMA, which is more restrictive
1184 than necessary... */
1185 struct dma_desc *rx_ring;
1186 dma_addr_t rx_ring_dma;
1187
1188 rx_ring = kzalloc(size, gfp);
1189 if (!rx_ring)
1190 goto out_err;
1191
1192 rx_ring_dma = dma_map_single(bp->sdev->dma_dev, rx_ring,
1193 DMA_TABLE_BYTES,
1194 DMA_BIDIRECTIONAL);
1195
1196 if (dma_mapping_error(bp->sdev->dma_dev, rx_ring_dma) ||
1197 rx_ring_dma + size > DMA_BIT_MASK(30)) {
1198 kfree(rx_ring);
1199 goto out_err;
1200 }
1201
1202 bp->rx_ring = rx_ring;
1203 bp->rx_ring_dma = rx_ring_dma;
1204 bp->flags |= B44_FLAG_RX_RING_HACK;
1205 }
1206
1207 bp->tx_ring = dma_alloc_coherent(bp->sdev->dma_dev, size,
1208 &bp->tx_ring_dma, gfp);
1209 if (!bp->tx_ring) {
1210 /* Allocation may have failed due to ssb_dma_alloc_consistent
1211 insisting on use of GFP_DMA, which is more restrictive
1212 than necessary... */
1213 struct dma_desc *tx_ring;
1214 dma_addr_t tx_ring_dma;
1215
1216 tx_ring = kzalloc(size, gfp);
1217 if (!tx_ring)
1218 goto out_err;
1219
1220 tx_ring_dma = dma_map_single(bp->sdev->dma_dev, tx_ring,
1221 DMA_TABLE_BYTES,
1222 DMA_TO_DEVICE);
1223
1224 if (dma_mapping_error(bp->sdev->dma_dev, tx_ring_dma) ||
1225 tx_ring_dma + size > DMA_BIT_MASK(30)) {
1226 kfree(tx_ring);
1227 goto out_err;
1228 }
1229
1230 bp->tx_ring = tx_ring;
1231 bp->tx_ring_dma = tx_ring_dma;
1232 bp->flags |= B44_FLAG_TX_RING_HACK;
1233 }
1234
1235 return 0;
1236
1237 out_err:
1238 b44_free_consistent(bp);
1239 return -ENOMEM;
1240 }
1241
1242 /* bp->lock is held. */
b44_clear_stats(struct b44 * bp)1243 static void b44_clear_stats(struct b44 *bp)
1244 {
1245 unsigned long reg;
1246
1247 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1248 for (reg = B44_TX_GOOD_O; reg <= B44_TX_PAUSE; reg += 4UL)
1249 br32(bp, reg);
1250 for (reg = B44_RX_GOOD_O; reg <= B44_RX_NPAUSE; reg += 4UL)
1251 br32(bp, reg);
1252 }
1253
1254 /* bp->lock is held. */
b44_chip_reset(struct b44 * bp,int reset_kind)1255 static void b44_chip_reset(struct b44 *bp, int reset_kind)
1256 {
1257 struct ssb_device *sdev = bp->sdev;
1258 bool was_enabled;
1259
1260 was_enabled = ssb_device_is_enabled(bp->sdev);
1261
1262 ssb_device_enable(bp->sdev, 0);
1263 ssb_pcicore_dev_irqvecs_enable(&sdev->bus->pcicore, sdev);
1264
1265 if (was_enabled) {
1266 bw32(bp, B44_RCV_LAZY, 0);
1267 bw32(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE);
1268 b44_wait_bit(bp, B44_ENET_CTRL, ENET_CTRL_DISABLE, 200, 1);
1269 bw32(bp, B44_DMATX_CTRL, 0);
1270 bp->tx_prod = bp->tx_cons = 0;
1271 if (br32(bp, B44_DMARX_STAT) & DMARX_STAT_EMASK) {
1272 b44_wait_bit(bp, B44_DMARX_STAT, DMARX_STAT_SIDLE,
1273 100, 0);
1274 }
1275 bw32(bp, B44_DMARX_CTRL, 0);
1276 bp->rx_prod = bp->rx_cons = 0;
1277 }
1278
1279 b44_clear_stats(bp);
1280
1281 /*
1282 * Don't enable PHY if we are doing a partial reset
1283 * we are probably going to power down
1284 */
1285 if (reset_kind == B44_CHIP_RESET_PARTIAL)
1286 return;
1287
1288 switch (sdev->bus->bustype) {
1289 case SSB_BUSTYPE_SSB:
1290 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1291 (DIV_ROUND_CLOSEST(ssb_clockspeed(sdev->bus),
1292 B44_MDC_RATIO)
1293 & MDIO_CTRL_MAXF_MASK)));
1294 break;
1295 case SSB_BUSTYPE_PCI:
1296 bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
1297 (0x0d & MDIO_CTRL_MAXF_MASK)));
1298 break;
1299 case SSB_BUSTYPE_PCMCIA:
1300 case SSB_BUSTYPE_SDIO:
1301 WARN_ON(1); /* A device with this bus does not exist. */
1302 break;
1303 }
1304
1305 br32(bp, B44_MDIO_CTRL);
1306
1307 if (!(br32(bp, B44_DEVCTRL) & DEVCTRL_IPP)) {
1308 bw32(bp, B44_ENET_CTRL, ENET_CTRL_EPSEL);
1309 br32(bp, B44_ENET_CTRL);
1310 bp->flags |= B44_FLAG_EXTERNAL_PHY;
1311 } else {
1312 u32 val = br32(bp, B44_DEVCTRL);
1313
1314 if (val & DEVCTRL_EPR) {
1315 bw32(bp, B44_DEVCTRL, (val & ~DEVCTRL_EPR));
1316 br32(bp, B44_DEVCTRL);
1317 udelay(100);
1318 }
1319 bp->flags &= ~B44_FLAG_EXTERNAL_PHY;
1320 }
1321 }
1322
1323 /* bp->lock is held. */
b44_halt(struct b44 * bp)1324 static void b44_halt(struct b44 *bp)
1325 {
1326 b44_disable_ints(bp);
1327 /* reset PHY */
1328 b44_phy_reset(bp);
1329 /* power down PHY */
1330 netdev_info(bp->dev, "powering down PHY\n");
1331 bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
1332 /* now reset the chip, but without enabling the MAC&PHY
1333 * part of it. This has to be done _after_ we shut down the PHY */
1334 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
1335 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
1336 else
1337 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1338 }
1339
1340 /* bp->lock is held. */
__b44_set_mac_addr(struct b44 * bp)1341 static void __b44_set_mac_addr(struct b44 *bp)
1342 {
1343 bw32(bp, B44_CAM_CTRL, 0);
1344 if (!(bp->dev->flags & IFF_PROMISC)) {
1345 u32 val;
1346
1347 __b44_cam_write(bp, bp->dev->dev_addr, 0);
1348 val = br32(bp, B44_CAM_CTRL);
1349 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1350 }
1351 }
1352
b44_set_mac_addr(struct net_device * dev,void * p)1353 static int b44_set_mac_addr(struct net_device *dev, void *p)
1354 {
1355 struct b44 *bp = netdev_priv(dev);
1356 struct sockaddr *addr = p;
1357 u32 val;
1358
1359 if (netif_running(dev))
1360 return -EBUSY;
1361
1362 if (!is_valid_ether_addr(addr->sa_data))
1363 return -EINVAL;
1364
1365 eth_hw_addr_set(dev, addr->sa_data);
1366
1367 spin_lock_irq(&bp->lock);
1368
1369 val = br32(bp, B44_RXCONFIG);
1370 if (!(val & RXCONFIG_CAM_ABSENT))
1371 __b44_set_mac_addr(bp);
1372
1373 spin_unlock_irq(&bp->lock);
1374
1375 return 0;
1376 }
1377
1378 /* Called at device open time to get the chip ready for
1379 * packet processing. Invoked with bp->lock held.
1380 */
1381 static void __b44_set_rx_mode(struct net_device *);
b44_init_hw(struct b44 * bp,int reset_kind)1382 static void b44_init_hw(struct b44 *bp, int reset_kind)
1383 {
1384 u32 val;
1385
1386 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
1387 if (reset_kind == B44_FULL_RESET) {
1388 b44_phy_reset(bp);
1389 b44_setup_phy(bp);
1390 }
1391
1392 /* Enable CRC32, set proper LED modes and power on PHY */
1393 bw32(bp, B44_MAC_CTRL, MAC_CTRL_CRC32_ENAB | MAC_CTRL_PHY_LEDCTRL);
1394 bw32(bp, B44_RCV_LAZY, (1 << RCV_LAZY_FC_SHIFT));
1395
1396 /* This sets the MAC address too. */
1397 __b44_set_rx_mode(bp->dev);
1398
1399 /* MTU + eth header + possible VLAN tag + struct rx_header */
1400 bw32(bp, B44_RXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1401 bw32(bp, B44_TXMAXLEN, bp->dev->mtu + ETH_HLEN + 8 + RX_HEADER_LEN);
1402
1403 bw32(bp, B44_TX_WMARK, 56); /* XXX magic */
1404 if (reset_kind == B44_PARTIAL_RESET) {
1405 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1406 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1407 } else {
1408 bw32(bp, B44_DMATX_CTRL, DMATX_CTRL_ENABLE);
1409 bw32(bp, B44_DMATX_ADDR, bp->tx_ring_dma + bp->dma_offset);
1410 bw32(bp, B44_DMARX_CTRL, (DMARX_CTRL_ENABLE |
1411 (RX_PKT_OFFSET << DMARX_CTRL_ROSHIFT)));
1412 bw32(bp, B44_DMARX_ADDR, bp->rx_ring_dma + bp->dma_offset);
1413
1414 bw32(bp, B44_DMARX_PTR, bp->rx_pending);
1415 bp->rx_prod = bp->rx_pending;
1416
1417 bw32(bp, B44_MIB_CTRL, MIB_CTRL_CLR_ON_READ);
1418 }
1419
1420 val = br32(bp, B44_ENET_CTRL);
1421 bw32(bp, B44_ENET_CTRL, (val | ENET_CTRL_ENABLE));
1422
1423 netdev_reset_queue(bp->dev);
1424 }
1425
b44_open(struct net_device * dev)1426 static int b44_open(struct net_device *dev)
1427 {
1428 struct b44 *bp = netdev_priv(dev);
1429 int err;
1430
1431 err = b44_alloc_consistent(bp, GFP_KERNEL);
1432 if (err)
1433 goto out;
1434
1435 napi_enable(&bp->napi);
1436
1437 b44_init_rings(bp);
1438 b44_init_hw(bp, B44_FULL_RESET);
1439
1440 b44_check_phy(bp);
1441
1442 err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
1443 if (unlikely(err < 0)) {
1444 napi_disable(&bp->napi);
1445 b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
1446 b44_free_rings(bp);
1447 b44_free_consistent(bp);
1448 goto out;
1449 }
1450
1451 timer_setup(&bp->timer, b44_timer, 0);
1452 bp->timer.expires = jiffies + HZ;
1453 add_timer(&bp->timer);
1454
1455 b44_enable_ints(bp);
1456
1457 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
1458 phy_start(dev->phydev);
1459
1460 netif_start_queue(dev);
1461 out:
1462 return err;
1463 }
1464
1465 #ifdef CONFIG_NET_POLL_CONTROLLER
1466 /*
1467 * Polling receive - used by netconsole and other diagnostic tools
1468 * to allow network i/o with interrupts disabled.
1469 */
b44_poll_controller(struct net_device * dev)1470 static void b44_poll_controller(struct net_device *dev)
1471 {
1472 disable_irq(dev->irq);
1473 b44_interrupt(dev->irq, dev);
1474 enable_irq(dev->irq);
1475 }
1476 #endif
1477
bwfilter_table(struct b44 * bp,u8 * pp,u32 bytes,u32 table_offset)1478 static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
1479 {
1480 u32 i;
1481 u32 *pattern = (u32 *) pp;
1482
1483 for (i = 0; i < bytes; i += sizeof(u32)) {
1484 bw32(bp, B44_FILT_ADDR, table_offset + i);
1485 bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
1486 }
1487 }
1488
b44_magic_pattern(const u8 * macaddr,u8 * ppattern,u8 * pmask,int offset)1489 static int b44_magic_pattern(const u8 *macaddr, u8 *ppattern, u8 *pmask,
1490 int offset)
1491 {
1492 int magicsync = 6;
1493 int k, j, len = offset;
1494 int ethaddr_bytes = ETH_ALEN;
1495
1496 memset(ppattern + offset, 0xff, magicsync);
1497 for (j = 0; j < magicsync; j++) {
1498 pmask[len >> 3] |= BIT(len & 7);
1499 len++;
1500 }
1501
1502 for (j = 0; j < B44_MAX_PATTERNS; j++) {
1503 if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
1504 ethaddr_bytes = ETH_ALEN;
1505 else
1506 ethaddr_bytes = B44_PATTERN_SIZE - len;
1507 if (ethaddr_bytes <=0)
1508 break;
1509 for (k = 0; k< ethaddr_bytes; k++) {
1510 ppattern[offset + magicsync +
1511 (j * ETH_ALEN) + k] = macaddr[k];
1512 pmask[len >> 3] |= BIT(len & 7);
1513 len++;
1514 }
1515 }
1516 return len - 1;
1517 }
1518
1519 /* Setup magic packet patterns in the b44 WOL
1520 * pattern matching filter.
1521 */
b44_setup_pseudo_magicp(struct b44 * bp)1522 static void b44_setup_pseudo_magicp(struct b44 *bp)
1523 {
1524
1525 u32 val;
1526 int plen0, plen1, plen2;
1527 u8 *pwol_pattern;
1528 u8 pwol_mask[B44_PMASK_SIZE];
1529
1530 pwol_pattern = kzalloc(B44_PATTERN_SIZE, GFP_KERNEL);
1531 if (!pwol_pattern)
1532 return;
1533
1534 /* Ipv4 magic packet pattern - pattern 0.*/
1535 memset(pwol_mask, 0, B44_PMASK_SIZE);
1536 plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1537 B44_ETHIPV4UDP_HLEN);
1538
1539 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
1540 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
1541
1542 /* Raw ethernet II magic packet pattern - pattern 1 */
1543 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1544 memset(pwol_mask, 0, B44_PMASK_SIZE);
1545 plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1546 ETH_HLEN);
1547
1548 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1549 B44_PATTERN_BASE + B44_PATTERN_SIZE);
1550 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1551 B44_PMASK_BASE + B44_PMASK_SIZE);
1552
1553 /* Ipv6 magic packet pattern - pattern 2 */
1554 memset(pwol_pattern, 0, B44_PATTERN_SIZE);
1555 memset(pwol_mask, 0, B44_PMASK_SIZE);
1556 plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
1557 B44_ETHIPV6UDP_HLEN);
1558
1559 bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
1560 B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
1561 bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
1562 B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
1563
1564 kfree(pwol_pattern);
1565
1566 /* set these pattern's lengths: one less than each real length */
1567 val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
1568 bw32(bp, B44_WKUP_LEN, val);
1569
1570 /* enable wakeup pattern matching */
1571 val = br32(bp, B44_DEVCTRL);
1572 bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
1573
1574 }
1575
1576 #ifdef CONFIG_B44_PCI
b44_setup_wol_pci(struct b44 * bp)1577 static void b44_setup_wol_pci(struct b44 *bp)
1578 {
1579 u16 val;
1580
1581 if (bp->sdev->bus->bustype != SSB_BUSTYPE_SSB) {
1582 bw32(bp, SSB_TMSLOW, br32(bp, SSB_TMSLOW) | SSB_TMSLOW_PE);
1583 pci_read_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, &val);
1584 pci_write_config_word(bp->sdev->bus->host_pci, SSB_PMCSR, val | SSB_PE);
1585 }
1586 }
1587 #else
b44_setup_wol_pci(struct b44 * bp)1588 static inline void b44_setup_wol_pci(struct b44 *bp) { }
1589 #endif /* CONFIG_B44_PCI */
1590
b44_setup_wol(struct b44 * bp)1591 static void b44_setup_wol(struct b44 *bp)
1592 {
1593 u32 val;
1594
1595 bw32(bp, B44_RXCONFIG, RXCONFIG_ALLMULTI);
1596
1597 if (bp->flags & B44_FLAG_B0_ANDLATER) {
1598
1599 bw32(bp, B44_WKUP_LEN, WKUP_LEN_DISABLE);
1600
1601 val = bp->dev->dev_addr[2] << 24 |
1602 bp->dev->dev_addr[3] << 16 |
1603 bp->dev->dev_addr[4] << 8 |
1604 bp->dev->dev_addr[5];
1605 bw32(bp, B44_ADDR_LO, val);
1606
1607 val = bp->dev->dev_addr[0] << 8 |
1608 bp->dev->dev_addr[1];
1609 bw32(bp, B44_ADDR_HI, val);
1610
1611 val = br32(bp, B44_DEVCTRL);
1612 bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
1613
1614 } else {
1615 b44_setup_pseudo_magicp(bp);
1616 }
1617 b44_setup_wol_pci(bp);
1618 }
1619
b44_close(struct net_device * dev)1620 static int b44_close(struct net_device *dev)
1621 {
1622 struct b44 *bp = netdev_priv(dev);
1623
1624 netif_stop_queue(dev);
1625
1626 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
1627 phy_stop(dev->phydev);
1628
1629 napi_disable(&bp->napi);
1630
1631 del_timer_sync(&bp->timer);
1632
1633 spin_lock_irq(&bp->lock);
1634
1635 b44_halt(bp);
1636 b44_free_rings(bp);
1637 netif_carrier_off(dev);
1638
1639 spin_unlock_irq(&bp->lock);
1640
1641 free_irq(dev->irq, dev);
1642
1643 if (bp->flags & B44_FLAG_WOL_ENABLE) {
1644 b44_init_hw(bp, B44_PARTIAL_RESET);
1645 b44_setup_wol(bp);
1646 }
1647
1648 b44_free_consistent(bp);
1649
1650 return 0;
1651 }
1652
b44_get_stats64(struct net_device * dev,struct rtnl_link_stats64 * nstat)1653 static void b44_get_stats64(struct net_device *dev,
1654 struct rtnl_link_stats64 *nstat)
1655 {
1656 struct b44 *bp = netdev_priv(dev);
1657 struct b44_hw_stats *hwstat = &bp->hw_stats;
1658 unsigned int start;
1659
1660 do {
1661 start = u64_stats_fetch_begin(&hwstat->syncp);
1662
1663 /* Convert HW stats into rtnl_link_stats64 stats. */
1664 nstat->rx_packets = hwstat->rx_pkts;
1665 nstat->tx_packets = hwstat->tx_pkts;
1666 nstat->rx_bytes = hwstat->rx_octets;
1667 nstat->tx_bytes = hwstat->tx_octets;
1668 nstat->tx_errors = (hwstat->tx_jabber_pkts +
1669 hwstat->tx_oversize_pkts +
1670 hwstat->tx_underruns +
1671 hwstat->tx_excessive_cols +
1672 hwstat->tx_late_cols);
1673 nstat->multicast = hwstat->rx_multicast_pkts;
1674 nstat->collisions = hwstat->tx_total_cols;
1675
1676 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
1677 hwstat->rx_undersize);
1678 nstat->rx_over_errors = hwstat->rx_missed_pkts;
1679 nstat->rx_frame_errors = hwstat->rx_align_errs;
1680 nstat->rx_crc_errors = hwstat->rx_crc_errs;
1681 nstat->rx_errors = (hwstat->rx_jabber_pkts +
1682 hwstat->rx_oversize_pkts +
1683 hwstat->rx_missed_pkts +
1684 hwstat->rx_crc_align_errs +
1685 hwstat->rx_undersize +
1686 hwstat->rx_crc_errs +
1687 hwstat->rx_align_errs +
1688 hwstat->rx_symbol_errs);
1689
1690 nstat->tx_aborted_errors = hwstat->tx_underruns;
1691 #if 0
1692 /* Carrier lost counter seems to be broken for some devices */
1693 nstat->tx_carrier_errors = hwstat->tx_carrier_lost;
1694 #endif
1695 } while (u64_stats_fetch_retry(&hwstat->syncp, start));
1696
1697 }
1698
__b44_load_mcast(struct b44 * bp,struct net_device * dev)1699 static int __b44_load_mcast(struct b44 *bp, struct net_device *dev)
1700 {
1701 struct netdev_hw_addr *ha;
1702 int i, num_ents;
1703
1704 num_ents = min_t(int, netdev_mc_count(dev), B44_MCAST_TABLE_SIZE);
1705 i = 0;
1706 netdev_for_each_mc_addr(ha, dev) {
1707 if (i == num_ents)
1708 break;
1709 __b44_cam_write(bp, ha->addr, i++ + 1);
1710 }
1711 return i+1;
1712 }
1713
__b44_set_rx_mode(struct net_device * dev)1714 static void __b44_set_rx_mode(struct net_device *dev)
1715 {
1716 struct b44 *bp = netdev_priv(dev);
1717 u32 val;
1718
1719 val = br32(bp, B44_RXCONFIG);
1720 val &= ~(RXCONFIG_PROMISC | RXCONFIG_ALLMULTI);
1721 if ((dev->flags & IFF_PROMISC) || (val & RXCONFIG_CAM_ABSENT)) {
1722 val |= RXCONFIG_PROMISC;
1723 bw32(bp, B44_RXCONFIG, val);
1724 } else {
1725 unsigned char zero[6] = {0, 0, 0, 0, 0, 0};
1726 int i = 1;
1727
1728 __b44_set_mac_addr(bp);
1729
1730 if ((dev->flags & IFF_ALLMULTI) ||
1731 (netdev_mc_count(dev) > B44_MCAST_TABLE_SIZE))
1732 val |= RXCONFIG_ALLMULTI;
1733 else
1734 i = __b44_load_mcast(bp, dev);
1735
1736 for (; i < 64; i++)
1737 __b44_cam_write(bp, zero, i);
1738
1739 bw32(bp, B44_RXCONFIG, val);
1740 val = br32(bp, B44_CAM_CTRL);
1741 bw32(bp, B44_CAM_CTRL, val | CAM_CTRL_ENABLE);
1742 }
1743 }
1744
b44_set_rx_mode(struct net_device * dev)1745 static void b44_set_rx_mode(struct net_device *dev)
1746 {
1747 struct b44 *bp = netdev_priv(dev);
1748
1749 spin_lock_irq(&bp->lock);
1750 __b44_set_rx_mode(dev);
1751 spin_unlock_irq(&bp->lock);
1752 }
1753
b44_get_msglevel(struct net_device * dev)1754 static u32 b44_get_msglevel(struct net_device *dev)
1755 {
1756 struct b44 *bp = netdev_priv(dev);
1757 return bp->msg_enable;
1758 }
1759
b44_set_msglevel(struct net_device * dev,u32 value)1760 static void b44_set_msglevel(struct net_device *dev, u32 value)
1761 {
1762 struct b44 *bp = netdev_priv(dev);
1763 bp->msg_enable = value;
1764 }
1765
b44_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)1766 static void b44_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1767 {
1768 struct b44 *bp = netdev_priv(dev);
1769 struct ssb_bus *bus = bp->sdev->bus;
1770
1771 strscpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
1772 switch (bus->bustype) {
1773 case SSB_BUSTYPE_PCI:
1774 strscpy(info->bus_info, pci_name(bus->host_pci), sizeof(info->bus_info));
1775 break;
1776 case SSB_BUSTYPE_SSB:
1777 strscpy(info->bus_info, "SSB", sizeof(info->bus_info));
1778 break;
1779 case SSB_BUSTYPE_PCMCIA:
1780 case SSB_BUSTYPE_SDIO:
1781 WARN_ON(1); /* A device with this bus does not exist. */
1782 break;
1783 }
1784 }
1785
b44_nway_reset(struct net_device * dev)1786 static int b44_nway_reset(struct net_device *dev)
1787 {
1788 struct b44 *bp = netdev_priv(dev);
1789 u32 bmcr;
1790 int r;
1791
1792 spin_lock_irq(&bp->lock);
1793 b44_readphy(bp, MII_BMCR, &bmcr);
1794 b44_readphy(bp, MII_BMCR, &bmcr);
1795 r = -EINVAL;
1796 if (bmcr & BMCR_ANENABLE)
1797 r = b44_writephy(bp, MII_BMCR,
1798 bmcr | BMCR_ANRESTART);
1799 spin_unlock_irq(&bp->lock);
1800
1801 return r;
1802 }
1803
b44_get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * cmd)1804 static int b44_get_link_ksettings(struct net_device *dev,
1805 struct ethtool_link_ksettings *cmd)
1806 {
1807 struct b44 *bp = netdev_priv(dev);
1808 u32 supported, advertising;
1809
1810 if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
1811 BUG_ON(!dev->phydev);
1812 phy_ethtool_ksettings_get(dev->phydev, cmd);
1813
1814 return 0;
1815 }
1816
1817 supported = (SUPPORTED_Autoneg);
1818 supported |= (SUPPORTED_100baseT_Half |
1819 SUPPORTED_100baseT_Full |
1820 SUPPORTED_10baseT_Half |
1821 SUPPORTED_10baseT_Full |
1822 SUPPORTED_MII);
1823
1824 advertising = 0;
1825 if (bp->flags & B44_FLAG_ADV_10HALF)
1826 advertising |= ADVERTISED_10baseT_Half;
1827 if (bp->flags & B44_FLAG_ADV_10FULL)
1828 advertising |= ADVERTISED_10baseT_Full;
1829 if (bp->flags & B44_FLAG_ADV_100HALF)
1830 advertising |= ADVERTISED_100baseT_Half;
1831 if (bp->flags & B44_FLAG_ADV_100FULL)
1832 advertising |= ADVERTISED_100baseT_Full;
1833 advertising |= ADVERTISED_Pause | ADVERTISED_Asym_Pause;
1834 cmd->base.speed = (bp->flags & B44_FLAG_100_BASE_T) ?
1835 SPEED_100 : SPEED_10;
1836 cmd->base.duplex = (bp->flags & B44_FLAG_FULL_DUPLEX) ?
1837 DUPLEX_FULL : DUPLEX_HALF;
1838 cmd->base.port = 0;
1839 cmd->base.phy_address = bp->phy_addr;
1840 cmd->base.autoneg = (bp->flags & B44_FLAG_FORCE_LINK) ?
1841 AUTONEG_DISABLE : AUTONEG_ENABLE;
1842 if (cmd->base.autoneg == AUTONEG_ENABLE)
1843 advertising |= ADVERTISED_Autoneg;
1844
1845 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1846 supported);
1847 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1848 advertising);
1849
1850 if (!netif_running(dev)){
1851 cmd->base.speed = 0;
1852 cmd->base.duplex = 0xff;
1853 }
1854
1855 return 0;
1856 }
1857
b44_set_link_ksettings(struct net_device * dev,const struct ethtool_link_ksettings * cmd)1858 static int b44_set_link_ksettings(struct net_device *dev,
1859 const struct ethtool_link_ksettings *cmd)
1860 {
1861 struct b44 *bp = netdev_priv(dev);
1862 u32 speed;
1863 int ret;
1864 u32 advertising;
1865
1866 if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
1867 BUG_ON(!dev->phydev);
1868 spin_lock_irq(&bp->lock);
1869 if (netif_running(dev))
1870 b44_setup_phy(bp);
1871
1872 ret = phy_ethtool_ksettings_set(dev->phydev, cmd);
1873
1874 spin_unlock_irq(&bp->lock);
1875
1876 return ret;
1877 }
1878
1879 speed = cmd->base.speed;
1880
1881 ethtool_convert_link_mode_to_legacy_u32(&advertising,
1882 cmd->link_modes.advertising);
1883
1884 /* We do not support gigabit. */
1885 if (cmd->base.autoneg == AUTONEG_ENABLE) {
1886 if (advertising &
1887 (ADVERTISED_1000baseT_Half |
1888 ADVERTISED_1000baseT_Full))
1889 return -EINVAL;
1890 } else if ((speed != SPEED_100 &&
1891 speed != SPEED_10) ||
1892 (cmd->base.duplex != DUPLEX_HALF &&
1893 cmd->base.duplex != DUPLEX_FULL)) {
1894 return -EINVAL;
1895 }
1896
1897 spin_lock_irq(&bp->lock);
1898
1899 if (cmd->base.autoneg == AUTONEG_ENABLE) {
1900 bp->flags &= ~(B44_FLAG_FORCE_LINK |
1901 B44_FLAG_100_BASE_T |
1902 B44_FLAG_FULL_DUPLEX |
1903 B44_FLAG_ADV_10HALF |
1904 B44_FLAG_ADV_10FULL |
1905 B44_FLAG_ADV_100HALF |
1906 B44_FLAG_ADV_100FULL);
1907 if (advertising == 0) {
1908 bp->flags |= (B44_FLAG_ADV_10HALF |
1909 B44_FLAG_ADV_10FULL |
1910 B44_FLAG_ADV_100HALF |
1911 B44_FLAG_ADV_100FULL);
1912 } else {
1913 if (advertising & ADVERTISED_10baseT_Half)
1914 bp->flags |= B44_FLAG_ADV_10HALF;
1915 if (advertising & ADVERTISED_10baseT_Full)
1916 bp->flags |= B44_FLAG_ADV_10FULL;
1917 if (advertising & ADVERTISED_100baseT_Half)
1918 bp->flags |= B44_FLAG_ADV_100HALF;
1919 if (advertising & ADVERTISED_100baseT_Full)
1920 bp->flags |= B44_FLAG_ADV_100FULL;
1921 }
1922 } else {
1923 bp->flags |= B44_FLAG_FORCE_LINK;
1924 bp->flags &= ~(B44_FLAG_100_BASE_T | B44_FLAG_FULL_DUPLEX);
1925 if (speed == SPEED_100)
1926 bp->flags |= B44_FLAG_100_BASE_T;
1927 if (cmd->base.duplex == DUPLEX_FULL)
1928 bp->flags |= B44_FLAG_FULL_DUPLEX;
1929 }
1930
1931 if (netif_running(dev))
1932 b44_setup_phy(bp);
1933
1934 spin_unlock_irq(&bp->lock);
1935
1936 return 0;
1937 }
1938
b44_get_ringparam(struct net_device * dev,struct ethtool_ringparam * ering,struct kernel_ethtool_ringparam * kernel_ering,struct netlink_ext_ack * extack)1939 static void b44_get_ringparam(struct net_device *dev,
1940 struct ethtool_ringparam *ering,
1941 struct kernel_ethtool_ringparam *kernel_ering,
1942 struct netlink_ext_ack *extack)
1943 {
1944 struct b44 *bp = netdev_priv(dev);
1945
1946 ering->rx_max_pending = B44_RX_RING_SIZE - 1;
1947 ering->rx_pending = bp->rx_pending;
1948
1949 /* XXX ethtool lacks a tx_max_pending, oops... */
1950 }
1951
b44_set_ringparam(struct net_device * dev,struct ethtool_ringparam * ering,struct kernel_ethtool_ringparam * kernel_ering,struct netlink_ext_ack * extack)1952 static int b44_set_ringparam(struct net_device *dev,
1953 struct ethtool_ringparam *ering,
1954 struct kernel_ethtool_ringparam *kernel_ering,
1955 struct netlink_ext_ack *extack)
1956 {
1957 struct b44 *bp = netdev_priv(dev);
1958
1959 if ((ering->rx_pending > B44_RX_RING_SIZE - 1) ||
1960 (ering->rx_mini_pending != 0) ||
1961 (ering->rx_jumbo_pending != 0) ||
1962 (ering->tx_pending > B44_TX_RING_SIZE - 1))
1963 return -EINVAL;
1964
1965 spin_lock_irq(&bp->lock);
1966
1967 bp->rx_pending = ering->rx_pending;
1968 bp->tx_pending = ering->tx_pending;
1969
1970 b44_halt(bp);
1971 b44_init_rings(bp);
1972 b44_init_hw(bp, B44_FULL_RESET);
1973 netif_wake_queue(bp->dev);
1974 spin_unlock_irq(&bp->lock);
1975
1976 b44_enable_ints(bp);
1977
1978 return 0;
1979 }
1980
b44_get_pauseparam(struct net_device * dev,struct ethtool_pauseparam * epause)1981 static void b44_get_pauseparam(struct net_device *dev,
1982 struct ethtool_pauseparam *epause)
1983 {
1984 struct b44 *bp = netdev_priv(dev);
1985
1986 epause->autoneg =
1987 (bp->flags & B44_FLAG_PAUSE_AUTO) != 0;
1988 epause->rx_pause =
1989 (bp->flags & B44_FLAG_RX_PAUSE) != 0;
1990 epause->tx_pause =
1991 (bp->flags & B44_FLAG_TX_PAUSE) != 0;
1992 }
1993
b44_set_pauseparam(struct net_device * dev,struct ethtool_pauseparam * epause)1994 static int b44_set_pauseparam(struct net_device *dev,
1995 struct ethtool_pauseparam *epause)
1996 {
1997 struct b44 *bp = netdev_priv(dev);
1998
1999 spin_lock_irq(&bp->lock);
2000 if (epause->autoneg)
2001 bp->flags |= B44_FLAG_PAUSE_AUTO;
2002 else
2003 bp->flags &= ~B44_FLAG_PAUSE_AUTO;
2004 if (epause->rx_pause)
2005 bp->flags |= B44_FLAG_RX_PAUSE;
2006 else
2007 bp->flags &= ~B44_FLAG_RX_PAUSE;
2008 if (epause->tx_pause)
2009 bp->flags |= B44_FLAG_TX_PAUSE;
2010 else
2011 bp->flags &= ~B44_FLAG_TX_PAUSE;
2012 if (bp->flags & B44_FLAG_PAUSE_AUTO) {
2013 b44_halt(bp);
2014 b44_init_rings(bp);
2015 b44_init_hw(bp, B44_FULL_RESET);
2016 } else {
2017 __b44_set_flow_ctrl(bp, bp->flags);
2018 }
2019 spin_unlock_irq(&bp->lock);
2020
2021 b44_enable_ints(bp);
2022
2023 return 0;
2024 }
2025
b44_get_strings(struct net_device * dev,u32 stringset,u8 * data)2026 static void b44_get_strings(struct net_device *dev, u32 stringset, u8 *data)
2027 {
2028 switch(stringset) {
2029 case ETH_SS_STATS:
2030 memcpy(data, *b44_gstrings, sizeof(b44_gstrings));
2031 break;
2032 }
2033 }
2034
b44_get_sset_count(struct net_device * dev,int sset)2035 static int b44_get_sset_count(struct net_device *dev, int sset)
2036 {
2037 switch (sset) {
2038 case ETH_SS_STATS:
2039 return ARRAY_SIZE(b44_gstrings);
2040 default:
2041 return -EOPNOTSUPP;
2042 }
2043 }
2044
b44_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * stats,u64 * data)2045 static void b44_get_ethtool_stats(struct net_device *dev,
2046 struct ethtool_stats *stats, u64 *data)
2047 {
2048 struct b44 *bp = netdev_priv(dev);
2049 struct b44_hw_stats *hwstat = &bp->hw_stats;
2050 u64 *data_src, *data_dst;
2051 unsigned int start;
2052 u32 i;
2053
2054 spin_lock_irq(&bp->lock);
2055 b44_stats_update(bp);
2056 spin_unlock_irq(&bp->lock);
2057
2058 do {
2059 data_src = &hwstat->tx_good_octets;
2060 data_dst = data;
2061 start = u64_stats_fetch_begin(&hwstat->syncp);
2062
2063 for (i = 0; i < ARRAY_SIZE(b44_gstrings); i++)
2064 *data_dst++ = *data_src++;
2065
2066 } while (u64_stats_fetch_retry(&hwstat->syncp, start));
2067 }
2068
b44_get_wol(struct net_device * dev,struct ethtool_wolinfo * wol)2069 static void b44_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2070 {
2071 struct b44 *bp = netdev_priv(dev);
2072
2073 wol->supported = WAKE_MAGIC;
2074 if (bp->flags & B44_FLAG_WOL_ENABLE)
2075 wol->wolopts = WAKE_MAGIC;
2076 else
2077 wol->wolopts = 0;
2078 memset(&wol->sopass, 0, sizeof(wol->sopass));
2079 }
2080
b44_set_wol(struct net_device * dev,struct ethtool_wolinfo * wol)2081 static int b44_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2082 {
2083 struct b44 *bp = netdev_priv(dev);
2084
2085 spin_lock_irq(&bp->lock);
2086 if (wol->wolopts & WAKE_MAGIC)
2087 bp->flags |= B44_FLAG_WOL_ENABLE;
2088 else
2089 bp->flags &= ~B44_FLAG_WOL_ENABLE;
2090 spin_unlock_irq(&bp->lock);
2091
2092 device_set_wakeup_enable(bp->sdev->dev, wol->wolopts & WAKE_MAGIC);
2093 return 0;
2094 }
2095
2096 static const struct ethtool_ops b44_ethtool_ops = {
2097 .get_drvinfo = b44_get_drvinfo,
2098 .nway_reset = b44_nway_reset,
2099 .get_link = ethtool_op_get_link,
2100 .get_wol = b44_get_wol,
2101 .set_wol = b44_set_wol,
2102 .get_ringparam = b44_get_ringparam,
2103 .set_ringparam = b44_set_ringparam,
2104 .get_pauseparam = b44_get_pauseparam,
2105 .set_pauseparam = b44_set_pauseparam,
2106 .get_msglevel = b44_get_msglevel,
2107 .set_msglevel = b44_set_msglevel,
2108 .get_strings = b44_get_strings,
2109 .get_sset_count = b44_get_sset_count,
2110 .get_ethtool_stats = b44_get_ethtool_stats,
2111 .get_link_ksettings = b44_get_link_ksettings,
2112 .set_link_ksettings = b44_set_link_ksettings,
2113 };
2114
b44_ioctl(struct net_device * dev,struct ifreq * ifr,int cmd)2115 static int b44_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2116 {
2117 struct b44 *bp = netdev_priv(dev);
2118 int err = -EINVAL;
2119
2120 if (!netif_running(dev))
2121 goto out;
2122
2123 spin_lock_irq(&bp->lock);
2124 if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
2125 BUG_ON(!dev->phydev);
2126 err = phy_mii_ioctl(dev->phydev, ifr, cmd);
2127 } else {
2128 err = generic_mii_ioctl(&bp->mii_if, if_mii(ifr), cmd, NULL);
2129 }
2130 spin_unlock_irq(&bp->lock);
2131 out:
2132 return err;
2133 }
2134
b44_get_invariants(struct b44 * bp)2135 static int b44_get_invariants(struct b44 *bp)
2136 {
2137 struct ssb_device *sdev = bp->sdev;
2138 int err = 0;
2139 u8 *addr;
2140
2141 bp->dma_offset = ssb_dma_translation(sdev);
2142
2143 if (sdev->bus->bustype == SSB_BUSTYPE_SSB &&
2144 instance > 1) {
2145 addr = sdev->bus->sprom.et1mac;
2146 bp->phy_addr = sdev->bus->sprom.et1phyaddr;
2147 } else {
2148 addr = sdev->bus->sprom.et0mac;
2149 bp->phy_addr = sdev->bus->sprom.et0phyaddr;
2150 }
2151 /* Some ROMs have buggy PHY addresses with the high
2152 * bits set (sign extension?). Truncate them to a
2153 * valid PHY address. */
2154 bp->phy_addr &= 0x1F;
2155
2156 eth_hw_addr_set(bp->dev, addr);
2157
2158 if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){
2159 pr_err("Invalid MAC address found in EEPROM\n");
2160 return -EINVAL;
2161 }
2162
2163 bp->imask = IMASK_DEF;
2164
2165 /* XXX - really required?
2166 bp->flags |= B44_FLAG_BUGGY_TXPTR;
2167 */
2168
2169 if (bp->sdev->id.revision >= 7)
2170 bp->flags |= B44_FLAG_B0_ANDLATER;
2171
2172 return err;
2173 }
2174
2175 static const struct net_device_ops b44_netdev_ops = {
2176 .ndo_open = b44_open,
2177 .ndo_stop = b44_close,
2178 .ndo_start_xmit = b44_start_xmit,
2179 .ndo_get_stats64 = b44_get_stats64,
2180 .ndo_set_rx_mode = b44_set_rx_mode,
2181 .ndo_set_mac_address = b44_set_mac_addr,
2182 .ndo_validate_addr = eth_validate_addr,
2183 .ndo_eth_ioctl = b44_ioctl,
2184 .ndo_tx_timeout = b44_tx_timeout,
2185 .ndo_change_mtu = b44_change_mtu,
2186 #ifdef CONFIG_NET_POLL_CONTROLLER
2187 .ndo_poll_controller = b44_poll_controller,
2188 #endif
2189 };
2190
b44_adjust_link(struct net_device * dev)2191 static void b44_adjust_link(struct net_device *dev)
2192 {
2193 struct b44 *bp = netdev_priv(dev);
2194 struct phy_device *phydev = dev->phydev;
2195 bool status_changed = false;
2196
2197 BUG_ON(!phydev);
2198
2199 if (bp->old_link != phydev->link) {
2200 status_changed = true;
2201 bp->old_link = phydev->link;
2202 }
2203
2204 /* reflect duplex change */
2205 if (phydev->link) {
2206 if ((phydev->duplex == DUPLEX_HALF) &&
2207 (bp->flags & B44_FLAG_FULL_DUPLEX)) {
2208 status_changed = true;
2209 bp->flags &= ~B44_FLAG_FULL_DUPLEX;
2210 } else if ((phydev->duplex == DUPLEX_FULL) &&
2211 !(bp->flags & B44_FLAG_FULL_DUPLEX)) {
2212 status_changed = true;
2213 bp->flags |= B44_FLAG_FULL_DUPLEX;
2214 }
2215 }
2216
2217 if (status_changed) {
2218 u32 val = br32(bp, B44_TX_CTRL);
2219 if (bp->flags & B44_FLAG_FULL_DUPLEX)
2220 val |= TX_CTRL_DUPLEX;
2221 else
2222 val &= ~TX_CTRL_DUPLEX;
2223 bw32(bp, B44_TX_CTRL, val);
2224 phy_print_status(phydev);
2225 }
2226 }
2227
b44_register_phy_one(struct b44 * bp)2228 static int b44_register_phy_one(struct b44 *bp)
2229 {
2230 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
2231 struct mii_bus *mii_bus;
2232 struct ssb_device *sdev = bp->sdev;
2233 struct phy_device *phydev;
2234 char bus_id[MII_BUS_ID_SIZE + 3];
2235 struct ssb_sprom *sprom = &sdev->bus->sprom;
2236 int err;
2237
2238 mii_bus = mdiobus_alloc();
2239 if (!mii_bus) {
2240 dev_err(sdev->dev, "mdiobus_alloc() failed\n");
2241 err = -ENOMEM;
2242 goto err_out;
2243 }
2244
2245 mii_bus->priv = bp;
2246 mii_bus->read = b44_mdio_read_phylib;
2247 mii_bus->write = b44_mdio_write_phylib;
2248 mii_bus->name = "b44_eth_mii";
2249 mii_bus->parent = sdev->dev;
2250 mii_bus->phy_mask = ~(1 << bp->phy_addr);
2251 snprintf(mii_bus->id, MII_BUS_ID_SIZE, "%x", instance);
2252
2253 bp->mii_bus = mii_bus;
2254
2255 err = mdiobus_register(mii_bus);
2256 if (err) {
2257 dev_err(sdev->dev, "failed to register MII bus\n");
2258 goto err_out_mdiobus;
2259 }
2260
2261 if (!mdiobus_is_registered_device(bp->mii_bus, bp->phy_addr) &&
2262 (sprom->boardflags_lo & (B44_BOARDFLAG_ROBO | B44_BOARDFLAG_ADM))) {
2263
2264 dev_info(sdev->dev,
2265 "could not find PHY at %i, use fixed one\n",
2266 bp->phy_addr);
2267
2268 bp->phy_addr = 0;
2269 snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, "fixed-0",
2270 bp->phy_addr);
2271 } else {
2272 snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, mii_bus->id,
2273 bp->phy_addr);
2274 }
2275
2276 phydev = phy_connect(bp->dev, bus_id, &b44_adjust_link,
2277 PHY_INTERFACE_MODE_MII);
2278 if (IS_ERR(phydev)) {
2279 dev_err(sdev->dev, "could not attach PHY at %i\n",
2280 bp->phy_addr);
2281 err = PTR_ERR(phydev);
2282 goto err_out_mdiobus_unregister;
2283 }
2284
2285 /* mask with MAC supported features */
2286 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, mask);
2287 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, mask);
2288 linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, mask);
2289 linkmode_set_bit(ETHTOOL_LINK_MODE_MII_BIT, mask);
2290 linkmode_and(phydev->supported, phydev->supported, mask);
2291 linkmode_copy(phydev->advertising, phydev->supported);
2292
2293 bp->old_link = 0;
2294 bp->phy_addr = phydev->mdio.addr;
2295
2296 phy_attached_info(phydev);
2297
2298 return 0;
2299
2300 err_out_mdiobus_unregister:
2301 mdiobus_unregister(mii_bus);
2302
2303 err_out_mdiobus:
2304 mdiobus_free(mii_bus);
2305
2306 err_out:
2307 return err;
2308 }
2309
b44_unregister_phy_one(struct b44 * bp)2310 static void b44_unregister_phy_one(struct b44 *bp)
2311 {
2312 struct net_device *dev = bp->dev;
2313 struct mii_bus *mii_bus = bp->mii_bus;
2314
2315 phy_disconnect(dev->phydev);
2316 mdiobus_unregister(mii_bus);
2317 mdiobus_free(mii_bus);
2318 }
2319
b44_init_one(struct ssb_device * sdev,const struct ssb_device_id * ent)2320 static int b44_init_one(struct ssb_device *sdev,
2321 const struct ssb_device_id *ent)
2322 {
2323 struct net_device *dev;
2324 struct b44 *bp;
2325 int err;
2326
2327 instance++;
2328
2329 dev = alloc_etherdev(sizeof(*bp));
2330 if (!dev) {
2331 err = -ENOMEM;
2332 goto out;
2333 }
2334
2335 SET_NETDEV_DEV(dev, sdev->dev);
2336
2337 /* No interesting netdevice features in this card... */
2338 dev->features |= 0;
2339
2340 bp = netdev_priv(dev);
2341 bp->sdev = sdev;
2342 bp->dev = dev;
2343 bp->force_copybreak = 0;
2344
2345 bp->msg_enable = netif_msg_init(b44_debug, B44_DEF_MSG_ENABLE);
2346
2347 spin_lock_init(&bp->lock);
2348 u64_stats_init(&bp->hw_stats.syncp);
2349
2350 bp->rx_pending = B44_DEF_RX_RING_PENDING;
2351 bp->tx_pending = B44_DEF_TX_RING_PENDING;
2352
2353 dev->netdev_ops = &b44_netdev_ops;
2354 netif_napi_add(dev, &bp->napi, b44_poll);
2355 dev->watchdog_timeo = B44_TX_TIMEOUT;
2356 dev->min_mtu = B44_MIN_MTU;
2357 dev->max_mtu = B44_MAX_MTU;
2358 dev->irq = sdev->irq;
2359 dev->ethtool_ops = &b44_ethtool_ops;
2360
2361 err = ssb_bus_powerup(sdev->bus, 0);
2362 if (err) {
2363 dev_err(sdev->dev,
2364 "Failed to powerup the bus\n");
2365 goto err_out_free_dev;
2366 }
2367
2368 err = dma_set_mask_and_coherent(sdev->dma_dev, DMA_BIT_MASK(30));
2369 if (err) {
2370 dev_err(sdev->dev,
2371 "Required 30BIT DMA mask unsupported by the system\n");
2372 goto err_out_powerdown;
2373 }
2374
2375 err = b44_get_invariants(bp);
2376 if (err) {
2377 dev_err(sdev->dev,
2378 "Problem fetching invariants of chip, aborting\n");
2379 goto err_out_powerdown;
2380 }
2381
2382 if (bp->phy_addr == B44_PHY_ADDR_NO_PHY) {
2383 dev_err(sdev->dev, "No PHY present on this MAC, aborting\n");
2384 err = -ENODEV;
2385 goto err_out_powerdown;
2386 }
2387
2388 bp->mii_if.dev = dev;
2389 bp->mii_if.mdio_read = b44_mdio_read_mii;
2390 bp->mii_if.mdio_write = b44_mdio_write_mii;
2391 bp->mii_if.phy_id = bp->phy_addr;
2392 bp->mii_if.phy_id_mask = 0x1f;
2393 bp->mii_if.reg_num_mask = 0x1f;
2394
2395 /* By default, advertise all speed/duplex settings. */
2396 bp->flags |= (B44_FLAG_ADV_10HALF | B44_FLAG_ADV_10FULL |
2397 B44_FLAG_ADV_100HALF | B44_FLAG_ADV_100FULL);
2398
2399 /* By default, auto-negotiate PAUSE. */
2400 bp->flags |= B44_FLAG_PAUSE_AUTO;
2401
2402 err = register_netdev(dev);
2403 if (err) {
2404 dev_err(sdev->dev, "Cannot register net device, aborting\n");
2405 goto err_out_powerdown;
2406 }
2407
2408 netif_carrier_off(dev);
2409
2410 ssb_set_drvdata(sdev, dev);
2411
2412 /* Chip reset provides power to the b44 MAC & PCI cores, which
2413 * is necessary for MAC register access.
2414 */
2415 b44_chip_reset(bp, B44_CHIP_RESET_FULL);
2416
2417 /* do a phy reset to test if there is an active phy */
2418 err = b44_phy_reset(bp);
2419 if (err < 0) {
2420 dev_err(sdev->dev, "phy reset failed\n");
2421 goto err_out_unregister_netdev;
2422 }
2423
2424 if (bp->flags & B44_FLAG_EXTERNAL_PHY) {
2425 err = b44_register_phy_one(bp);
2426 if (err) {
2427 dev_err(sdev->dev, "Cannot register PHY, aborting\n");
2428 goto err_out_unregister_netdev;
2429 }
2430 }
2431
2432 device_set_wakeup_capable(sdev->dev, true);
2433 netdev_info(dev, "%s %pM\n", DRV_DESCRIPTION, dev->dev_addr);
2434
2435 return 0;
2436
2437 err_out_unregister_netdev:
2438 unregister_netdev(dev);
2439 err_out_powerdown:
2440 ssb_bus_may_powerdown(sdev->bus);
2441
2442 err_out_free_dev:
2443 netif_napi_del(&bp->napi);
2444 free_netdev(dev);
2445
2446 out:
2447 return err;
2448 }
2449
b44_remove_one(struct ssb_device * sdev)2450 static void b44_remove_one(struct ssb_device *sdev)
2451 {
2452 struct net_device *dev = ssb_get_drvdata(sdev);
2453 struct b44 *bp = netdev_priv(dev);
2454
2455 unregister_netdev(dev);
2456 if (bp->flags & B44_FLAG_EXTERNAL_PHY)
2457 b44_unregister_phy_one(bp);
2458 ssb_device_disable(sdev, 0);
2459 ssb_bus_may_powerdown(sdev->bus);
2460 netif_napi_del(&bp->napi);
2461 free_netdev(dev);
2462 ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2463 ssb_set_drvdata(sdev, NULL);
2464 }
2465
b44_suspend(struct ssb_device * sdev,pm_message_t state)2466 static int b44_suspend(struct ssb_device *sdev, pm_message_t state)
2467 {
2468 struct net_device *dev = ssb_get_drvdata(sdev);
2469 struct b44 *bp = netdev_priv(dev);
2470
2471 if (!netif_running(dev))
2472 return 0;
2473
2474 del_timer_sync(&bp->timer);
2475
2476 spin_lock_irq(&bp->lock);
2477
2478 b44_halt(bp);
2479 netif_carrier_off(bp->dev);
2480 netif_device_detach(bp->dev);
2481 b44_free_rings(bp);
2482
2483 spin_unlock_irq(&bp->lock);
2484
2485 free_irq(dev->irq, dev);
2486 if (bp->flags & B44_FLAG_WOL_ENABLE) {
2487 b44_init_hw(bp, B44_PARTIAL_RESET);
2488 b44_setup_wol(bp);
2489 }
2490
2491 ssb_pcihost_set_power_state(sdev, PCI_D3hot);
2492 return 0;
2493 }
2494
b44_resume(struct ssb_device * sdev)2495 static int b44_resume(struct ssb_device *sdev)
2496 {
2497 struct net_device *dev = ssb_get_drvdata(sdev);
2498 struct b44 *bp = netdev_priv(dev);
2499 int rc = 0;
2500
2501 rc = ssb_bus_powerup(sdev->bus, 0);
2502 if (rc) {
2503 dev_err(sdev->dev,
2504 "Failed to powerup the bus\n");
2505 return rc;
2506 }
2507
2508 if (!netif_running(dev))
2509 return 0;
2510
2511 spin_lock_irq(&bp->lock);
2512 b44_init_rings(bp);
2513 b44_init_hw(bp, B44_FULL_RESET);
2514 spin_unlock_irq(&bp->lock);
2515
2516 /*
2517 * As a shared interrupt, the handler can be called immediately. To be
2518 * able to check the interrupt status the hardware must already be
2519 * powered back on (b44_init_hw).
2520 */
2521 rc = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
2522 if (rc) {
2523 netdev_err(dev, "request_irq failed\n");
2524 spin_lock_irq(&bp->lock);
2525 b44_halt(bp);
2526 b44_free_rings(bp);
2527 spin_unlock_irq(&bp->lock);
2528 return rc;
2529 }
2530
2531 netif_device_attach(bp->dev);
2532
2533 b44_enable_ints(bp);
2534 netif_wake_queue(dev);
2535
2536 mod_timer(&bp->timer, jiffies + 1);
2537
2538 return 0;
2539 }
2540
2541 static struct ssb_driver b44_ssb_driver = {
2542 .name = DRV_MODULE_NAME,
2543 .id_table = b44_ssb_tbl,
2544 .probe = b44_init_one,
2545 .remove = b44_remove_one,
2546 .suspend = b44_suspend,
2547 .resume = b44_resume,
2548 };
2549
b44_pci_init(void)2550 static inline int __init b44_pci_init(void)
2551 {
2552 int err = 0;
2553 #ifdef CONFIG_B44_PCI
2554 err = ssb_pcihost_register(&b44_pci_driver);
2555 #endif
2556 return err;
2557 }
2558
b44_pci_exit(void)2559 static inline void b44_pci_exit(void)
2560 {
2561 #ifdef CONFIG_B44_PCI
2562 ssb_pcihost_unregister(&b44_pci_driver);
2563 #endif
2564 }
2565
b44_init(void)2566 static int __init b44_init(void)
2567 {
2568 unsigned int dma_desc_align_size = dma_get_cache_alignment();
2569 int err;
2570
2571 /* Setup paramaters for syncing RX/TX DMA descriptors */
2572 dma_desc_sync_size = max_t(unsigned int, dma_desc_align_size, sizeof(struct dma_desc));
2573
2574 err = b44_pci_init();
2575 if (err)
2576 return err;
2577 err = ssb_driver_register(&b44_ssb_driver);
2578 if (err)
2579 b44_pci_exit();
2580 return err;
2581 }
2582
b44_cleanup(void)2583 static void __exit b44_cleanup(void)
2584 {
2585 ssb_driver_unregister(&b44_ssb_driver);
2586 b44_pci_exit();
2587 }
2588
2589 module_init(b44_init);
2590 module_exit(b44_cleanup);
2591
2592
