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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / sis / sis190.c
blob5a4b6e3ab38ffc5f0b2d1fa14047c3f047bbd4bf
1 /*
2 sis190.c: Silicon Integrated Systems SiS190 ethernet driver
3
4 Copyright (c) 2003 K.M. Liu <kmliu@sis.com>
5 Copyright (c) 2003, 2004 Jeff Garzik <jgarzik@pobox.com>
6 Copyright (c) 2003, 2004, 2005 Francois Romieu <romieu@fr.zoreil.com>
7
8 Based on r8169.c, tg3.c, 8139cp.c, skge.c, epic100.c and SiS 190/191
9 genuine driver.
10
11 This software may be used and distributed according to the terms of
12 the GNU General Public License (GPL), incorporated herein by reference.
13 Drivers based on or derived from this code fall under the GPL and must
14 retain the authorship, copyright and license notice. This file is not
15 a complete program and may only be used when the entire operating
16 system is licensed under the GPL.
17
18 See the file COPYING in this distribution for more information.
19
20 */
21
22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
24 #include <linux/interrupt.h>
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/netdevice.h>
28 #include <linux/rtnetlink.h>
29 #include <linux/etherdevice.h>
30 #include <linux/ethtool.h>
31 #include <linux/pci.h>
32 #include <linux/mii.h>
33 #include <linux/delay.h>
34 #include <linux/crc32.h>
35 #include <linux/dma-mapping.h>
36 #include <linux/slab.h>
37 #include <asm/irq.h>
38
39 #define PHY_MAX_ADDR 32
40 #define PHY_ID_ANY 0x1f
41 #define MII_REG_ANY 0x1f
42
43 #define DRV_VERSION "1.4"
44 #define DRV_NAME "sis190"
45 #define SIS190_DRIVER_NAME DRV_NAME " Gigabit Ethernet driver " DRV_VERSION
46
47 #define sis190_rx_skb netif_rx
48 #define sis190_rx_quota(count, quota) count
49
50 #define NUM_TX_DESC 64 /* [8..1024] */
51 #define NUM_RX_DESC 64 /* [8..8192] */
52 #define TX_RING_BYTES (NUM_TX_DESC * sizeof(struct TxDesc))
53 #define RX_RING_BYTES (NUM_RX_DESC * sizeof(struct RxDesc))
54 #define RX_BUF_SIZE 1536
55 #define RX_BUF_MASK 0xfff8
56
57 #define SIS190_REGS_SIZE 0x80
58 #define SIS190_TX_TIMEOUT (6*HZ)
59 #define SIS190_PHY_TIMEOUT (10*HZ)
60 #define SIS190_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | \
61 NETIF_MSG_LINK | NETIF_MSG_IFUP | \
62 NETIF_MSG_IFDOWN)
63
64 /* Enhanced PHY access register bit definitions */
65 #define EhnMIIread 0x0000
66 #define EhnMIIwrite 0x0020
67 #define EhnMIIdataShift 16
68 #define EhnMIIpmdShift 6 /* 7016 only */
69 #define EhnMIIregShift 11
70 #define EhnMIIreq 0x0010
71 #define EhnMIInotDone 0x0010
72
73 /* Write/read MMIO register */
74 #define SIS_W8(reg, val) writeb ((val), ioaddr + (reg))
75 #define SIS_W16(reg, val) writew ((val), ioaddr + (reg))
76 #define SIS_W32(reg, val) writel ((val), ioaddr + (reg))
77 #define SIS_R8(reg) readb (ioaddr + (reg))
78 #define SIS_R16(reg) readw (ioaddr + (reg))
79 #define SIS_R32(reg) readl (ioaddr + (reg))
80
81 #define SIS_PCI_COMMIT() SIS_R32(IntrControl)
82
83 enum sis190_registers {
84 TxControl = 0x00,
85 TxDescStartAddr = 0x04,
86 rsv0 = 0x08, // reserved
87 TxSts = 0x0c, // unused (Control/Status)
88 RxControl = 0x10,
89 RxDescStartAddr = 0x14,
90 rsv1 = 0x18, // reserved
91 RxSts = 0x1c, // unused
92 IntrStatus = 0x20,
93 IntrMask = 0x24,
94 IntrControl = 0x28,
95 IntrTimer = 0x2c, // unused (Interrupt Timer)
96 PMControl = 0x30, // unused (Power Mgmt Control/Status)
97 rsv2 = 0x34, // reserved
98 ROMControl = 0x38,
99 ROMInterface = 0x3c,
100 StationControl = 0x40,
101 GMIIControl = 0x44,
102 GIoCR = 0x48, // unused (GMAC IO Compensation)
103 GIoCtrl = 0x4c, // unused (GMAC IO Control)
104 TxMacControl = 0x50,
105 TxLimit = 0x54, // unused (Tx MAC Timer/TryLimit)
106 RGDelay = 0x58, // unused (RGMII Tx Internal Delay)
107 rsv3 = 0x5c, // reserved
108 RxMacControl = 0x60,
109 RxMacAddr = 0x62,
110 RxHashTable = 0x68,
111 // Undocumented = 0x6c,
112 RxWolCtrl = 0x70,
113 RxWolData = 0x74, // unused (Rx WOL Data Access)
114 RxMPSControl = 0x78, // unused (Rx MPS Control)
115 rsv4 = 0x7c, // reserved
116 };
117
118 enum sis190_register_content {
119 /* IntrStatus */
120 SoftInt = 0x40000000, // unused
121 Timeup = 0x20000000, // unused
122 PauseFrame = 0x00080000, // unused
123 MagicPacket = 0x00040000, // unused
124 WakeupFrame = 0x00020000, // unused
125 LinkChange = 0x00010000,
126 RxQEmpty = 0x00000080,
127 RxQInt = 0x00000040,
128 TxQ1Empty = 0x00000020, // unused
129 TxQ1Int = 0x00000010,
130 TxQ0Empty = 0x00000008, // unused
131 TxQ0Int = 0x00000004,
132 RxHalt = 0x00000002,
133 TxHalt = 0x00000001,
134
135 /* {Rx/Tx}CmdBits */
136 CmdReset = 0x10,
137 CmdRxEnb = 0x08, // unused
138 CmdTxEnb = 0x01,
139 RxBufEmpty = 0x01, // unused
140
141 /* Cfg9346Bits */
142 Cfg9346_Lock = 0x00, // unused
143 Cfg9346_Unlock = 0xc0, // unused
144
145 /* RxMacControl */
146 AcceptErr = 0x20, // unused
147 AcceptRunt = 0x10, // unused
148 AcceptBroadcast = 0x0800,
149 AcceptMulticast = 0x0400,
150 AcceptMyPhys = 0x0200,
151 AcceptAllPhys = 0x0100,
152
153 /* RxConfigBits */
154 RxCfgFIFOShift = 13,
155 RxCfgDMAShift = 8, // 0x1a in RxControl ?
156
157 /* TxConfigBits */
158 TxInterFrameGapShift = 24,
159 TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
160
161 LinkStatus = 0x02, // unused
162 FullDup = 0x01, // unused
163
164 /* TBICSRBit */
165 TBILinkOK = 0x02000000, // unused
166 };
167
168 struct TxDesc {
169 __le32 PSize;
170 __le32 status;
171 __le32 addr;
172 __le32 size;
173 };
174
175 struct RxDesc {
176 __le32 PSize;
177 __le32 status;
178 __le32 addr;
179 __le32 size;
180 };
181
182 enum _DescStatusBit {
183 /* _Desc.status */
184 OWNbit = 0x80000000, // RXOWN/TXOWN
185 INTbit = 0x40000000, // RXINT/TXINT
186 CRCbit = 0x00020000, // CRCOFF/CRCEN
187 PADbit = 0x00010000, // PREADD/PADEN
188 /* _Desc.size */
189 RingEnd = 0x80000000,
190 /* TxDesc.status */
191 LSEN = 0x08000000, // TSO ? -- FR
192 IPCS = 0x04000000,
193 TCPCS = 0x02000000,
194 UDPCS = 0x01000000,
195 BSTEN = 0x00800000,
196 EXTEN = 0x00400000,
197 DEFEN = 0x00200000,
198 BKFEN = 0x00100000,
199 CRSEN = 0x00080000,
200 COLEN = 0x00040000,
201 THOL3 = 0x30000000,
202 THOL2 = 0x20000000,
203 THOL1 = 0x10000000,
204 THOL0 = 0x00000000,
205
206 WND = 0x00080000,
207 TABRT = 0x00040000,
208 FIFO = 0x00020000,
209 LINK = 0x00010000,
210 ColCountMask = 0x0000ffff,
211 /* RxDesc.status */
212 IPON = 0x20000000,
213 TCPON = 0x10000000,
214 UDPON = 0x08000000,
215 Wakup = 0x00400000,
216 Magic = 0x00200000,
217 Pause = 0x00100000,
218 DEFbit = 0x00200000,
219 BCAST = 0x000c0000,
220 MCAST = 0x00080000,
221 UCAST = 0x00040000,
222 /* RxDesc.PSize */
223 TAGON = 0x80000000,
224 RxDescCountMask = 0x7f000000, // multi-desc pkt when > 1 ? -- FR
225 ABORT = 0x00800000,
226 SHORT = 0x00400000,
227 LIMIT = 0x00200000,
228 MIIER = 0x00100000,
229 OVRUN = 0x00080000,
230 NIBON = 0x00040000,
231 COLON = 0x00020000,
232 CRCOK = 0x00010000,
233 RxSizeMask = 0x0000ffff
234 /*
235 * The asic could apparently do vlan, TSO, jumbo (sis191 only) and
236 * provide two (unused with Linux) Tx queues. No publicly
237 * available documentation alas.
238 */
239 };
240
241 enum sis190_eeprom_access_register_bits {
242 EECS = 0x00000001, // unused
243 EECLK = 0x00000002, // unused
244 EEDO = 0x00000008, // unused
245 EEDI = 0x00000004, // unused
246 EEREQ = 0x00000080,
247 EEROP = 0x00000200,
248 EEWOP = 0x00000100 // unused
249 };
250
251 /* EEPROM Addresses */
252 enum sis190_eeprom_address {
253 EEPROMSignature = 0x00,
254 EEPROMCLK = 0x01, // unused
255 EEPROMInfo = 0x02,
256 EEPROMMACAddr = 0x03
257 };
258
259 enum sis190_feature {
260 F_HAS_RGMII = 1,
261 F_PHY_88E1111 = 2,
262 F_PHY_BCM5461 = 4
263 };
264
265 struct sis190_private {
266 void __iomem *mmio_addr;
267 struct pci_dev *pci_dev;
268 struct net_device *dev;
269 spinlock_t lock;
270 u32 rx_buf_sz;
271 u32 cur_rx;
272 u32 cur_tx;
273 u32 dirty_rx;
274 u32 dirty_tx;
275 dma_addr_t rx_dma;
276 dma_addr_t tx_dma;
277 struct RxDesc *RxDescRing;
278 struct TxDesc *TxDescRing;
279 struct sk_buff *Rx_skbuff[NUM_RX_DESC];
280 struct sk_buff *Tx_skbuff[NUM_TX_DESC];
281 struct work_struct phy_task;
282 struct timer_list timer;
283 u32 msg_enable;
284 struct mii_if_info mii_if;
285 struct list_head first_phy;
286 u32 features;
287 u32 negotiated_lpa;
288 enum {
289 LNK_OFF,
290 LNK_ON,
291 LNK_AUTONEG,
292 } link_status;
293 };
294
295 struct sis190_phy {
296 struct list_head list;
297 int phy_id;
298 u16 id[2];
299 u16 status;
300 u8 type;
301 };
302
303 enum sis190_phy_type {
304 UNKNOWN = 0x00,
305 HOME = 0x01,
306 LAN = 0x02,
307 MIX = 0x03
308 };
309
310 static struct mii_chip_info {
311 const char *name;
312 u16 id[2];
313 unsigned int type;
314 u32 feature;
315 } mii_chip_table[] = {
316 { "Atheros PHY", { 0x004d, 0xd010 }, LAN, 0 },
317 { "Atheros PHY AR8012", { 0x004d, 0xd020 }, LAN, 0 },
318 { "Broadcom PHY BCM5461", { 0x0020, 0x60c0 }, LAN, F_PHY_BCM5461 },
319 { "Broadcom PHY AC131", { 0x0143, 0xbc70 }, LAN, 0 },
320 { "Agere PHY ET1101B", { 0x0282, 0xf010 }, LAN, 0 },
321 { "Marvell PHY 88E1111", { 0x0141, 0x0cc0 }, LAN, F_PHY_88E1111 },
322 { "Realtek PHY RTL8201", { 0x0000, 0x8200 }, LAN, 0 },
323 { NULL, }
324 };
325
326 static const struct {
327 const char *name;
328 } sis_chip_info[] = {
329 { "SiS 190 PCI Fast Ethernet adapter" },
330 { "SiS 191 PCI Gigabit Ethernet adapter" },
331 };
332
333 static const struct pci_device_id sis190_pci_tbl[] = {
334 { PCI_DEVICE(PCI_VENDOR_ID_SI, 0x0190), 0, 0, 0 },
335 { PCI_DEVICE(PCI_VENDOR_ID_SI, 0x0191), 0, 0, 1 },
336 { 0, },
337 };
338
339 MODULE_DEVICE_TABLE(pci, sis190_pci_tbl);
340
341 static int rx_copybreak = 200;
342
343 static struct {
344 u32 msg_enable;
345 } debug = { -1 };
346
347 MODULE_DESCRIPTION("SiS sis190/191 Gigabit Ethernet driver");
348 module_param(rx_copybreak, int, 0);
349 MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames");
350 module_param_named(debug, debug.msg_enable, int, 0);
351 MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., 16=all)");
352 MODULE_AUTHOR("K.M. Liu <kmliu@sis.com>, Ueimor <romieu@fr.zoreil.com>");
353 MODULE_VERSION(DRV_VERSION);
354 MODULE_LICENSE("GPL");
355
356 static const u32 sis190_intr_mask =
357 RxQEmpty | RxQInt | TxQ1Int | TxQ0Int | RxHalt | TxHalt | LinkChange;
358
359 /*
360 * Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
361 * The chips use a 64 element hash table based on the Ethernet CRC.
362 */
363 static const int multicast_filter_limit = 32;
364
365 static void __mdio_cmd(void __iomem *ioaddr, u32 ctl)
366 {
367 unsigned int i;
368
369 SIS_W32(GMIIControl, ctl);
370
371 msleep(1);
372
373 for (i = 0; i < 100; i++) {
374 if (!(SIS_R32(GMIIControl) & EhnMIInotDone))
375 break;
376 msleep(1);
377 }
378
379 if (i > 99)
380 pr_err("PHY command failed !\n");
381 }
382
383 static void mdio_write(void __iomem *ioaddr, int phy_id, int reg, int val)
384 {
385 __mdio_cmd(ioaddr, EhnMIIreq | EhnMIIwrite |
386 (((u32) reg) << EhnMIIregShift) | (phy_id << EhnMIIpmdShift) |
387 (((u32) val) << EhnMIIdataShift));
388 }
389
390 static int mdio_read(void __iomem *ioaddr, int phy_id, int reg)
391 {
392 __mdio_cmd(ioaddr, EhnMIIreq | EhnMIIread |
393 (((u32) reg) << EhnMIIregShift) | (phy_id << EhnMIIpmdShift));
394
395 return (u16) (SIS_R32(GMIIControl) >> EhnMIIdataShift);
396 }
397
398 static void __mdio_write(struct net_device *dev, int phy_id, int reg, int val)
399 {
400 struct sis190_private *tp = netdev_priv(dev);
401
402 mdio_write(tp->mmio_addr, phy_id, reg, val);
403 }
404
405 static int __mdio_read(struct net_device *dev, int phy_id, int reg)
406 {
407 struct sis190_private *tp = netdev_priv(dev);
408
409 return mdio_read(tp->mmio_addr, phy_id, reg);
410 }
411
412 static u16 mdio_read_latched(void __iomem *ioaddr, int phy_id, int reg)
413 {
414 mdio_read(ioaddr, phy_id, reg);
415 return mdio_read(ioaddr, phy_id, reg);
416 }
417
418 static u16 sis190_read_eeprom(void __iomem *ioaddr, u32 reg)
419 {
420 u16 data = 0xffff;
421 unsigned int i;
422
423 if (!(SIS_R32(ROMControl) & 0x0002))
424 return 0;
425
426 SIS_W32(ROMInterface, EEREQ | EEROP | (reg << 10));
427
428 for (i = 0; i < 200; i++) {
429 if (!(SIS_R32(ROMInterface) & EEREQ)) {
430 data = (SIS_R32(ROMInterface) & 0xffff0000) >> 16;
431 break;
432 }
433 msleep(1);
434 }
435
436 return data;
437 }
438
439 static void sis190_irq_mask_and_ack(void __iomem *ioaddr)
440 {
441 SIS_W32(IntrMask, 0x00);
442 SIS_W32(IntrStatus, 0xffffffff);
443 SIS_PCI_COMMIT();
444 }
445
446 static void sis190_asic_down(void __iomem *ioaddr)
447 {
448 /* Stop the chip's Tx and Rx DMA processes. */
449
450 SIS_W32(TxControl, 0x1a00);
451 SIS_W32(RxControl, 0x1a00);
452
453 sis190_irq_mask_and_ack(ioaddr);
454 }
455
456 static void sis190_mark_as_last_descriptor(struct RxDesc *desc)
457 {
458 desc->size |= cpu_to_le32(RingEnd);
459 }
460
461 static inline void sis190_give_to_asic(struct RxDesc *desc, u32 rx_buf_sz)
462 {
463 u32 eor = le32_to_cpu(desc->size) & RingEnd;
464
465 desc->PSize = 0x0;
466 desc->size = cpu_to_le32((rx_buf_sz & RX_BUF_MASK) | eor);
467 wmb();
468 desc->status = cpu_to_le32(OWNbit | INTbit);
469 }
470
471 static inline void sis190_map_to_asic(struct RxDesc *desc, dma_addr_t mapping,
472 u32 rx_buf_sz)
473 {
474 desc->addr = cpu_to_le32(mapping);
475 sis190_give_to_asic(desc, rx_buf_sz);
476 }
477
478 static inline void sis190_make_unusable_by_asic(struct RxDesc *desc)
479 {
480 desc->PSize = 0x0;
481 desc->addr = cpu_to_le32(0xdeadbeef);
482 desc->size &= cpu_to_le32(RingEnd);
483 wmb();
484 desc->status = 0x0;
485 }
486
487 static struct sk_buff *sis190_alloc_rx_skb(struct sis190_private *tp,
488 struct RxDesc *desc)
489 {
490 u32 rx_buf_sz = tp->rx_buf_sz;
491 struct sk_buff *skb;
492 dma_addr_t mapping;
493
494 skb = netdev_alloc_skb(tp->dev, rx_buf_sz);
495 if (unlikely(!skb))
496 goto skb_alloc_failed;
497 mapping = pci_map_single(tp->pci_dev, skb->data, tp->rx_buf_sz,
498 PCI_DMA_FROMDEVICE);
499 if (pci_dma_mapping_error(tp->pci_dev, mapping))
500 goto out;
501 sis190_map_to_asic(desc, mapping, rx_buf_sz);
502
503 return skb;
504
505 out:
506 dev_kfree_skb_any(skb);
507 skb_alloc_failed:
508 sis190_make_unusable_by_asic(desc);
509 return NULL;
510 }
511
512 static u32 sis190_rx_fill(struct sis190_private *tp, struct net_device *dev,
513 u32 start, u32 end)
514 {
515 u32 cur;
516
517 for (cur = start; cur < end; cur++) {
518 unsigned int i = cur % NUM_RX_DESC;
519
520 if (tp->Rx_skbuff[i])
521 continue;
522
523 tp->Rx_skbuff[i] = sis190_alloc_rx_skb(tp, tp->RxDescRing + i);
524
525 if (!tp->Rx_skbuff[i])
526 break;
527 }
528 return cur - start;
529 }
530
531 static bool sis190_try_rx_copy(struct sis190_private *tp,
532 struct sk_buff **sk_buff, int pkt_size,
533 dma_addr_t addr)
534 {
535 struct sk_buff *skb;
536 bool done = false;
537
538 if (pkt_size >= rx_copybreak)
539 goto out;
540
541 skb = netdev_alloc_skb_ip_align(tp->dev, pkt_size);
542 if (!skb)
543 goto out;
544
545 pci_dma_sync_single_for_cpu(tp->pci_dev, addr, tp->rx_buf_sz,
546 PCI_DMA_FROMDEVICE);
547 skb_copy_to_linear_data(skb, sk_buff[0]->data, pkt_size);
548 *sk_buff = skb;
549 done = true;
550 out:
551 return done;
552 }
553
554 static inline int sis190_rx_pkt_err(u32 status, struct net_device_stats *stats)
555 {
556 #define ErrMask (OVRUN | SHORT | LIMIT | MIIER | NIBON | COLON | ABORT)
557
558 if ((status & CRCOK) && !(status & ErrMask))
559 return 0;
560
561 if (!(status & CRCOK))
562 stats->rx_crc_errors++;
563 else if (status & OVRUN)
564 stats->rx_over_errors++;
565 else if (status & (SHORT | LIMIT))
566 stats->rx_length_errors++;
567 else if (status & (MIIER | NIBON | COLON))
568 stats->rx_frame_errors++;
569
570 stats->rx_errors++;
571 return -1;
572 }
573
574 static int sis190_rx_interrupt(struct net_device *dev,
575 struct sis190_private *tp, void __iomem *ioaddr)
576 {
577 struct net_device_stats *stats = &dev->stats;
578 u32 rx_left, cur_rx = tp->cur_rx;
579 u32 delta, count;
580
581 rx_left = NUM_RX_DESC + tp->dirty_rx - cur_rx;
582 rx_left = sis190_rx_quota(rx_left, (u32) dev->quota);
583
584 for (; rx_left > 0; rx_left--, cur_rx++) {
585 unsigned int entry = cur_rx % NUM_RX_DESC;
586 struct RxDesc *desc = tp->RxDescRing + entry;
587 u32 status;
588
589 if (le32_to_cpu(desc->status) & OWNbit)
590 break;
591
592 status = le32_to_cpu(desc->PSize);
593
594 //netif_info(tp, intr, dev, "Rx PSize = %08x\n", status);
595
596 if (sis190_rx_pkt_err(status, stats) < 0)
597 sis190_give_to_asic(desc, tp->rx_buf_sz);
598 else {
599 struct sk_buff *skb = tp->Rx_skbuff[entry];
600 dma_addr_t addr = le32_to_cpu(desc->addr);
601 int pkt_size = (status & RxSizeMask) - 4;
602 struct pci_dev *pdev = tp->pci_dev;
603
604 if (unlikely(pkt_size > tp->rx_buf_sz)) {
605 netif_info(tp, intr, dev,
606 "(frag) status = %08x\n", status);
607 stats->rx_dropped++;
608 stats->rx_length_errors++;
609 sis190_give_to_asic(desc, tp->rx_buf_sz);
610 continue;
611 }
612
613
614 if (sis190_try_rx_copy(tp, &skb, pkt_size, addr)) {
615 pci_dma_sync_single_for_device(pdev, addr,
616 tp->rx_buf_sz, PCI_DMA_FROMDEVICE);
617 sis190_give_to_asic(desc, tp->rx_buf_sz);
618 } else {
619 pci_unmap_single(pdev, addr, tp->rx_buf_sz,
620 PCI_DMA_FROMDEVICE);
621 tp->Rx_skbuff[entry] = NULL;
622 sis190_make_unusable_by_asic(desc);
623 }
624
625 skb_put(skb, pkt_size);
626 skb->protocol = eth_type_trans(skb, dev);
627
628 sis190_rx_skb(skb);
629
630 stats->rx_packets++;
631 stats->rx_bytes += pkt_size;
632 if ((status & BCAST) == MCAST)
633 stats->multicast++;
634 }
635 }
636 count = cur_rx - tp->cur_rx;
637 tp->cur_rx = cur_rx;
638
639 delta = sis190_rx_fill(tp, dev, tp->dirty_rx, tp->cur_rx);
640 if (!delta && count)
641 netif_info(tp, intr, dev, "no Rx buffer allocated\n");
642 tp->dirty_rx += delta;
643
644 if ((tp->dirty_rx + NUM_RX_DESC) == tp->cur_rx)
645 netif_emerg(tp, intr, dev, "Rx buffers exhausted\n");
646
647 return count;
648 }
649
650 static void sis190_unmap_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
651 struct TxDesc *desc)
652 {
653 unsigned int len;
654
655 len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
656
657 pci_unmap_single(pdev, le32_to_cpu(desc->addr), len, PCI_DMA_TODEVICE);
658
659 memset(desc, 0x00, sizeof(*desc));
660 }
661
662 static inline int sis190_tx_pkt_err(u32 status, struct net_device_stats *stats)
663 {
664 #define TxErrMask (WND | TABRT | FIFO | LINK)
665
666 if (!unlikely(status & TxErrMask))
667 return 0;
668
669 if (status & WND)
670 stats->tx_window_errors++;
671 if (status & TABRT)
672 stats->tx_aborted_errors++;
673 if (status & FIFO)
674 stats->tx_fifo_errors++;
675 if (status & LINK)
676 stats->tx_carrier_errors++;
677
678 stats->tx_errors++;
679
680 return -1;
681 }
682
683 static void sis190_tx_interrupt(struct net_device *dev,
684 struct sis190_private *tp, void __iomem *ioaddr)
685 {
686 struct net_device_stats *stats = &dev->stats;
687 u32 pending, dirty_tx = tp->dirty_tx;
688 /*
689 * It would not be needed if queueing was allowed to be enabled
690 * again too early (hint: think preempt and unclocked smp systems).
691 */
692 unsigned int queue_stopped;
693
694 smp_rmb();
695 pending = tp->cur_tx - dirty_tx;
696 queue_stopped = (pending == NUM_TX_DESC);
697
698 for (; pending; pending--, dirty_tx++) {
699 unsigned int entry = dirty_tx % NUM_TX_DESC;
700 struct TxDesc *txd = tp->TxDescRing + entry;
701 u32 status = le32_to_cpu(txd->status);
702 struct sk_buff *skb;
703
704 if (status & OWNbit)
705 break;
706
707 skb = tp->Tx_skbuff[entry];
708
709 if (likely(sis190_tx_pkt_err(status, stats) == 0)) {
710 stats->tx_packets++;
711 stats->tx_bytes += skb->len;
712 stats->collisions += ((status & ColCountMask) - 1);
713 }
714
715 sis190_unmap_tx_skb(tp->pci_dev, skb, txd);
716 tp->Tx_skbuff[entry] = NULL;
717 dev_consume_skb_irq(skb);
718 }
719
720 if (tp->dirty_tx != dirty_tx) {
721 tp->dirty_tx = dirty_tx;
722 smp_wmb();
723 if (queue_stopped)
724 netif_wake_queue(dev);
725 }
726 }
727
728 /*
729 * The interrupt handler does all of the Rx thread work and cleans up after
730 * the Tx thread.
731 */
732 static irqreturn_t sis190_irq(int irq, void *__dev)
733 {
734 struct net_device *dev = __dev;
735 struct sis190_private *tp = netdev_priv(dev);
736 void __iomem *ioaddr = tp->mmio_addr;
737 unsigned int handled = 0;
738 u32 status;
739
740 status = SIS_R32(IntrStatus);
741
742 if ((status == 0xffffffff) || !status)
743 goto out;
744
745 handled = 1;
746
747 if (unlikely(!netif_running(dev))) {
748 sis190_asic_down(ioaddr);
749 goto out;
750 }
751
752 SIS_W32(IntrStatus, status);
753
754 // netif_info(tp, intr, dev, "status = %08x\n", status);
755
756 if (status & LinkChange) {
757 netif_info(tp, intr, dev, "link change\n");
758 del_timer(&tp->timer);
759 schedule_work(&tp->phy_task);
760 }
761
762 if (status & RxQInt)
763 sis190_rx_interrupt(dev, tp, ioaddr);
764
765 if (status & TxQ0Int)
766 sis190_tx_interrupt(dev, tp, ioaddr);
767 out:
768 return IRQ_RETVAL(handled);
769 }
770
771 #ifdef CONFIG_NET_POLL_CONTROLLER
772 static void sis190_netpoll(struct net_device *dev)
773 {
774 struct sis190_private *tp = netdev_priv(dev);
775 const int irq = tp->pci_dev->irq;
776
777 disable_irq(irq);
778 sis190_irq(irq, dev);
779 enable_irq(irq);
780 }
781 #endif
782
783 static void sis190_free_rx_skb(struct sis190_private *tp,
784 struct sk_buff **sk_buff, struct RxDesc *desc)
785 {
786 struct pci_dev *pdev = tp->pci_dev;
787
788 pci_unmap_single(pdev, le32_to_cpu(desc->addr), tp->rx_buf_sz,
789 PCI_DMA_FROMDEVICE);
790 dev_kfree_skb(*sk_buff);
791 *sk_buff = NULL;
792 sis190_make_unusable_by_asic(desc);
793 }
794
795 static void sis190_rx_clear(struct sis190_private *tp)
796 {
797 unsigned int i;
798
799 for (i = 0; i < NUM_RX_DESC; i++) {
800 if (!tp->Rx_skbuff[i])
801 continue;
802 sis190_free_rx_skb(tp, tp->Rx_skbuff + i, tp->RxDescRing + i);
803 }
804 }
805
806 static void sis190_init_ring_indexes(struct sis190_private *tp)
807 {
808 tp->dirty_tx = tp->dirty_rx = tp->cur_tx = tp->cur_rx = 0;
809 }
810
811 static int sis190_init_ring(struct net_device *dev)
812 {
813 struct sis190_private *tp = netdev_priv(dev);
814
815 sis190_init_ring_indexes(tp);
816
817 memset(tp->Tx_skbuff, 0x0, NUM_TX_DESC * sizeof(struct sk_buff *));
818 memset(tp->Rx_skbuff, 0x0, NUM_RX_DESC * sizeof(struct sk_buff *));
819
820 if (sis190_rx_fill(tp, dev, 0, NUM_RX_DESC) != NUM_RX_DESC)
821 goto err_rx_clear;
822
823 sis190_mark_as_last_descriptor(tp->RxDescRing + NUM_RX_DESC - 1);
824
825 return 0;
826
827 err_rx_clear:
828 sis190_rx_clear(tp);
829 return -ENOMEM;
830 }
831
832 static void sis190_set_rx_mode(struct net_device *dev)
833 {
834 struct sis190_private *tp = netdev_priv(dev);
835 void __iomem *ioaddr = tp->mmio_addr;
836 unsigned long flags;
837 u32 mc_filter[2]; /* Multicast hash filter */
838 u16 rx_mode;
839
840 if (dev->flags & IFF_PROMISC) {
841 rx_mode =
842 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
843 AcceptAllPhys;
844 mc_filter[1] = mc_filter[0] = 0xffffffff;
845 } else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
846 (dev->flags & IFF_ALLMULTI)) {
847 /* Too many to filter perfectly -- accept all multicasts. */
848 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
849 mc_filter[1] = mc_filter[0] = 0xffffffff;
850 } else {
851 struct netdev_hw_addr *ha;
852
853 rx_mode = AcceptBroadcast | AcceptMyPhys;
854 mc_filter[1] = mc_filter[0] = 0;
855 netdev_for_each_mc_addr(ha, dev) {
856 int bit_nr =
857 ether_crc(ETH_ALEN, ha->addr) & 0x3f;
858 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
859 rx_mode |= AcceptMulticast;
860 }
861 }
862
863 spin_lock_irqsave(&tp->lock, flags);
864
865 SIS_W16(RxMacControl, rx_mode | 0x2);
866 SIS_W32(RxHashTable, mc_filter[0]);
867 SIS_W32(RxHashTable + 4, mc_filter[1]);
868
869 spin_unlock_irqrestore(&tp->lock, flags);
870 }
871
872 static void sis190_soft_reset(void __iomem *ioaddr)
873 {
874 SIS_W32(IntrControl, 0x8000);
875 SIS_PCI_COMMIT();
876 SIS_W32(IntrControl, 0x0);
877 sis190_asic_down(ioaddr);
878 }
879
880 static void sis190_hw_start(struct net_device *dev)
881 {
882 struct sis190_private *tp = netdev_priv(dev);
883 void __iomem *ioaddr = tp->mmio_addr;
884
885 sis190_soft_reset(ioaddr);
886
887 SIS_W32(TxDescStartAddr, tp->tx_dma);
888 SIS_W32(RxDescStartAddr, tp->rx_dma);
889
890 SIS_W32(IntrStatus, 0xffffffff);
891 SIS_W32(IntrMask, 0x0);
892 SIS_W32(GMIIControl, 0x0);
893 SIS_W32(TxMacControl, 0x60);
894 SIS_W16(RxMacControl, 0x02);
895 SIS_W32(RxHashTable, 0x0);
896 SIS_W32(0x6c, 0x0);
897 SIS_W32(RxWolCtrl, 0x0);
898 SIS_W32(RxWolData, 0x0);
899
900 SIS_PCI_COMMIT();
901
902 sis190_set_rx_mode(dev);
903
904 /* Enable all known interrupts by setting the interrupt mask. */
905 SIS_W32(IntrMask, sis190_intr_mask);
906
907 SIS_W32(TxControl, 0x1a00 | CmdTxEnb);
908 SIS_W32(RxControl, 0x1a1d);
909
910 netif_start_queue(dev);
911 }
912
913 static void sis190_phy_task(struct work_struct *work)
914 {
915 struct sis190_private *tp =
916 container_of(work, struct sis190_private, phy_task);
917 struct net_device *dev = tp->dev;
918 void __iomem *ioaddr = tp->mmio_addr;
919 int phy_id = tp->mii_if.phy_id;
920 u16 val;
921
922 rtnl_lock();
923
924 if (!netif_running(dev))
925 goto out_unlock;
926
927 val = mdio_read(ioaddr, phy_id, MII_BMCR);
928 if (val & BMCR_RESET) {
929 // FIXME: needlessly high ? -- FR 02/07/2005
930 mod_timer(&tp->timer, jiffies + HZ/10);
931 goto out_unlock;
932 }
933
934 val = mdio_read_latched(ioaddr, phy_id, MII_BMSR);
935 if (!(val & BMSR_ANEGCOMPLETE) && tp->link_status != LNK_AUTONEG) {
936 netif_carrier_off(dev);
937 netif_warn(tp, link, dev, "auto-negotiating...\n");
938 tp->link_status = LNK_AUTONEG;
939 } else if ((val & BMSR_LSTATUS) && tp->link_status != LNK_ON) {
940 /* Rejoice ! */
941 struct {
942 int val;
943 u32 ctl;
944 const char *msg;
945 } reg31[] = {
946 { LPA_1000FULL, 0x07000c00 | 0x00001000,
947 "1000 Mbps Full Duplex" },
948 { LPA_1000HALF, 0x07000c00,
949 "1000 Mbps Half Duplex" },
950 { LPA_100FULL, 0x04000800 | 0x00001000,
951 "100 Mbps Full Duplex" },
952 { LPA_100HALF, 0x04000800,
953 "100 Mbps Half Duplex" },
954 { LPA_10FULL, 0x04000400 | 0x00001000,
955 "10 Mbps Full Duplex" },
956 { LPA_10HALF, 0x04000400,
957 "10 Mbps Half Duplex" },
958 { 0, 0x04000400, "unknown" }
959 }, *p = NULL;
960 u16 adv, autoexp, gigadv, gigrec;
961
962 val = mdio_read(ioaddr, phy_id, 0x1f);
963 netif_info(tp, link, dev, "mii ext = %04x\n", val);
964
965 val = mdio_read(ioaddr, phy_id, MII_LPA);
966 adv = mdio_read(ioaddr, phy_id, MII_ADVERTISE);
967 autoexp = mdio_read(ioaddr, phy_id, MII_EXPANSION);
968 netif_info(tp, link, dev, "mii lpa=%04x adv=%04x exp=%04x\n",
969 val, adv, autoexp);
970
971 if (val & LPA_NPAGE && autoexp & EXPANSION_NWAY) {
972 /* check for gigabit speed */
973 gigadv = mdio_read(ioaddr, phy_id, MII_CTRL1000);
974 gigrec = mdio_read(ioaddr, phy_id, MII_STAT1000);
975 val = (gigadv & (gigrec >> 2));
976 if (val & ADVERTISE_1000FULL)
977 p = reg31;
978 else if (val & ADVERTISE_1000HALF)
979 p = reg31 + 1;
980 }
981 if (!p) {
982 val &= adv;
983
984 for (p = reg31; p->val; p++) {
985 if ((val & p->val) == p->val)
986 break;
987 }
988 }
989
990 p->ctl |= SIS_R32(StationControl) & ~0x0f001c00;
991
992 if ((tp->features & F_HAS_RGMII) &&
993 (tp->features & F_PHY_BCM5461)) {
994 // Set Tx Delay in RGMII mode.
995 mdio_write(ioaddr, phy_id, 0x18, 0xf1c7);
996 udelay(200);
997 mdio_write(ioaddr, phy_id, 0x1c, 0x8c00);
998 p->ctl |= 0x03000000;
999 }
1000
1001 SIS_W32(StationControl, p->ctl);
1002
1003 if (tp->features & F_HAS_RGMII) {
1004 SIS_W32(RGDelay, 0x0441);
1005 SIS_W32(RGDelay, 0x0440);
1006 }
1007
1008 tp->negotiated_lpa = p->val;
1009
1010 netif_info(tp, link, dev, "link on %s mode\n", p->msg);
1011 netif_carrier_on(dev);
1012 tp->link_status = LNK_ON;
1013 } else if (!(val & BMSR_LSTATUS) && tp->link_status != LNK_AUTONEG)
1014 tp->link_status = LNK_OFF;
1015 mod_timer(&tp->timer, jiffies + SIS190_PHY_TIMEOUT);
1016
1017 out_unlock:
1018 rtnl_unlock();
1019 }
1020
1021 static void sis190_phy_timer(struct timer_list *t)
1022 {
1023 struct sis190_private *tp = from_timer(tp, t, timer);
1024 struct net_device *dev = tp->dev;
1025
1026 if (likely(netif_running(dev)))
1027 schedule_work(&tp->phy_task);
1028 }
1029
1030 static inline void sis190_delete_timer(struct net_device *dev)
1031 {
1032 struct sis190_private *tp = netdev_priv(dev);
1033
1034 del_timer_sync(&tp->timer);
1035 }
1036
1037 static inline void sis190_request_timer(struct net_device *dev)
1038 {
1039 struct sis190_private *tp = netdev_priv(dev);
1040 struct timer_list *timer = &tp->timer;
1041
1042 timer_setup(timer, sis190_phy_timer, 0);
1043 timer->expires = jiffies + SIS190_PHY_TIMEOUT;
1044 add_timer(timer);
1045 }
1046
1047 static void sis190_set_rxbufsize(struct sis190_private *tp,
1048 struct net_device *dev)
1049 {
1050 unsigned int mtu = dev->mtu;
1051
1052 tp->rx_buf_sz = (mtu > RX_BUF_SIZE) ? mtu + ETH_HLEN + 8 : RX_BUF_SIZE;
1053 /* RxDesc->size has a licence to kill the lower bits */
1054 if (tp->rx_buf_sz & 0x07) {
1055 tp->rx_buf_sz += 8;
1056 tp->rx_buf_sz &= RX_BUF_MASK;
1057 }
1058 }
1059
1060 static int sis190_open(struct net_device *dev)
1061 {
1062 struct sis190_private *tp = netdev_priv(dev);
1063 struct pci_dev *pdev = tp->pci_dev;
1064 int rc = -ENOMEM;
1065
1066 sis190_set_rxbufsize(tp, dev);
1067
1068 /*
1069 * Rx and Tx descriptors need 256 bytes alignment.
1070 * pci_alloc_consistent() guarantees a stronger alignment.
1071 */
1072 tp->TxDescRing = pci_alloc_consistent(pdev, TX_RING_BYTES, &tp->tx_dma);
1073 if (!tp->TxDescRing)
1074 goto out;
1075
1076 tp->RxDescRing = pci_alloc_consistent(pdev, RX_RING_BYTES, &tp->rx_dma);
1077 if (!tp->RxDescRing)
1078 goto err_free_tx_0;
1079
1080 rc = sis190_init_ring(dev);
1081 if (rc < 0)
1082 goto err_free_rx_1;
1083
1084 sis190_request_timer(dev);
1085
1086 rc = request_irq(pdev->irq, sis190_irq, IRQF_SHARED, dev->name, dev);
1087 if (rc < 0)
1088 goto err_release_timer_2;
1089
1090 sis190_hw_start(dev);
1091 out:
1092 return rc;
1093
1094 err_release_timer_2:
1095 sis190_delete_timer(dev);
1096 sis190_rx_clear(tp);
1097 err_free_rx_1:
1098 pci_free_consistent(pdev, RX_RING_BYTES, tp->RxDescRing, tp->rx_dma);
1099 err_free_tx_0:
1100 pci_free_consistent(pdev, TX_RING_BYTES, tp->TxDescRing, tp->tx_dma);
1101 goto out;
1102 }
1103
1104 static void sis190_tx_clear(struct sis190_private *tp)
1105 {
1106 unsigned int i;
1107
1108 for (i = 0; i < NUM_TX_DESC; i++) {
1109 struct sk_buff *skb = tp->Tx_skbuff[i];
1110
1111 if (!skb)
1112 continue;
1113
1114 sis190_unmap_tx_skb(tp->pci_dev, skb, tp->TxDescRing + i);
1115 tp->Tx_skbuff[i] = NULL;
1116 dev_kfree_skb(skb);
1117
1118 tp->dev->stats.tx_dropped++;
1119 }
1120 tp->cur_tx = tp->dirty_tx = 0;
1121 }
1122
1123 static void sis190_down(struct net_device *dev)
1124 {
1125 struct sis190_private *tp = netdev_priv(dev);
1126 void __iomem *ioaddr = tp->mmio_addr;
1127 unsigned int poll_locked = 0;
1128
1129 sis190_delete_timer(dev);
1130
1131 netif_stop_queue(dev);
1132
1133 do {
1134 spin_lock_irq(&tp->lock);
1135
1136 sis190_asic_down(ioaddr);
1137
1138 spin_unlock_irq(&tp->lock);
1139
1140 synchronize_irq(tp->pci_dev->irq);
1141
1142 if (!poll_locked)
1143 poll_locked++;
1144
1145 synchronize_rcu();
1146
1147 } while (SIS_R32(IntrMask));
1148
1149 sis190_tx_clear(tp);
1150 sis190_rx_clear(tp);
1151 }
1152
1153 static int sis190_close(struct net_device *dev)
1154 {
1155 struct sis190_private *tp = netdev_priv(dev);
1156 struct pci_dev *pdev = tp->pci_dev;
1157
1158 sis190_down(dev);
1159
1160 free_irq(pdev->irq, dev);
1161
1162 pci_free_consistent(pdev, TX_RING_BYTES, tp->TxDescRing, tp->tx_dma);
1163 pci_free_consistent(pdev, RX_RING_BYTES, tp->RxDescRing, tp->rx_dma);
1164
1165 tp->TxDescRing = NULL;
1166 tp->RxDescRing = NULL;
1167
1168 return 0;
1169 }
1170
1171 static netdev_tx_t sis190_start_xmit(struct sk_buff *skb,
1172 struct net_device *dev)
1173 {
1174 struct sis190_private *tp = netdev_priv(dev);
1175 void __iomem *ioaddr = tp->mmio_addr;
1176 u32 len, entry, dirty_tx;
1177 struct TxDesc *desc;
1178 dma_addr_t mapping;
1179
1180 if (unlikely(skb->len < ETH_ZLEN)) {
1181 if (skb_padto(skb, ETH_ZLEN)) {
1182 dev->stats.tx_dropped++;
1183 goto out;
1184 }
1185 len = ETH_ZLEN;
1186 } else {
1187 len = skb->len;
1188 }
1189
1190 entry = tp->cur_tx % NUM_TX_DESC;
1191 desc = tp->TxDescRing + entry;
1192
1193 if (unlikely(le32_to_cpu(desc->status) & OWNbit)) {
1194 netif_stop_queue(dev);
1195 netif_err(tp, tx_err, dev,
1196 "BUG! Tx Ring full when queue awake!\n");
1197 return NETDEV_TX_BUSY;
1198 }
1199
1200 mapping = pci_map_single(tp->pci_dev, skb->data, len, PCI_DMA_TODEVICE);
1201 if (pci_dma_mapping_error(tp->pci_dev, mapping)) {
1202 netif_err(tp, tx_err, dev,
1203 "PCI mapping failed, dropping packet");
1204 return NETDEV_TX_BUSY;
1205 }
1206
1207 tp->Tx_skbuff[entry] = skb;
1208
1209 desc->PSize = cpu_to_le32(len);
1210 desc->addr = cpu_to_le32(mapping);
1211
1212 desc->size = cpu_to_le32(len);
1213 if (entry == (NUM_TX_DESC - 1))
1214 desc->size |= cpu_to_le32(RingEnd);
1215
1216 wmb();
1217
1218 desc->status = cpu_to_le32(OWNbit | INTbit | DEFbit | CRCbit | PADbit);
1219 if (tp->negotiated_lpa & (LPA_1000HALF | LPA_100HALF | LPA_10HALF)) {
1220 /* Half Duplex */
1221 desc->status |= cpu_to_le32(COLEN | CRSEN | BKFEN);
1222 if (tp->negotiated_lpa & (LPA_1000HALF | LPA_1000FULL))
1223 desc->status |= cpu_to_le32(EXTEN | BSTEN); /* gigabit HD */
1224 }
1225
1226 tp->cur_tx++;
1227
1228 smp_wmb();
1229
1230 SIS_W32(TxControl, 0x1a00 | CmdReset | CmdTxEnb);
1231
1232 dirty_tx = tp->dirty_tx;
1233 if ((tp->cur_tx - NUM_TX_DESC) == dirty_tx) {
1234 netif_stop_queue(dev);
1235 smp_rmb();
1236 if (dirty_tx != tp->dirty_tx)
1237 netif_wake_queue(dev);
1238 }
1239 out:
1240 return NETDEV_TX_OK;
1241 }
1242
1243 static void sis190_free_phy(struct list_head *first_phy)
1244 {
1245 struct sis190_phy *cur, *next;
1246
1247 list_for_each_entry_safe(cur, next, first_phy, list) {
1248 kfree(cur);
1249 }
1250 }
1251
1252 /**
1253 * sis190_default_phy - Select default PHY for sis190 mac.
1254 * @dev: the net device to probe for
1255 *
1256 * Select first detected PHY with link as default.
1257 * If no one is link on, select PHY whose types is HOME as default.
1258 * If HOME doesn't exist, select LAN.
1259 */
1260 static u16 sis190_default_phy(struct net_device *dev)
1261 {
1262 struct sis190_phy *phy, *phy_home, *phy_default, *phy_lan;
1263 struct sis190_private *tp = netdev_priv(dev);
1264 struct mii_if_info *mii_if = &tp->mii_if;
1265 void __iomem *ioaddr = tp->mmio_addr;
1266 u16 status;
1267
1268 phy_home = phy_default = phy_lan = NULL;
1269
1270 list_for_each_entry(phy, &tp->first_phy, list) {
1271 status = mdio_read_latched(ioaddr, phy->phy_id, MII_BMSR);
1272
1273 // Link ON & Not select default PHY & not ghost PHY.
1274 if ((status & BMSR_LSTATUS) &&
1275 !phy_default &&
1276 (phy->type != UNKNOWN)) {
1277 phy_default = phy;
1278 } else {
1279 status = mdio_read(ioaddr, phy->phy_id, MII_BMCR);
1280 mdio_write(ioaddr, phy->phy_id, MII_BMCR,
1281 status | BMCR_ANENABLE | BMCR_ISOLATE);
1282 if (phy->type == HOME)
1283 phy_home = phy;
1284 else if (phy->type == LAN)
1285 phy_lan = phy;
1286 }
1287 }
1288
1289 if (!phy_default) {
1290 if (phy_home)
1291 phy_default = phy_home;
1292 else if (phy_lan)
1293 phy_default = phy_lan;
1294 else
1295 phy_default = list_first_entry(&tp->first_phy,
1296 struct sis190_phy, list);
1297 }
1298
1299 if (mii_if->phy_id != phy_default->phy_id) {
1300 mii_if->phy_id = phy_default->phy_id;
1301 if (netif_msg_probe(tp))
1302 pr_info("%s: Using transceiver at address %d as default\n",
1303 pci_name(tp->pci_dev), mii_if->phy_id);
1304 }
1305
1306 status = mdio_read(ioaddr, mii_if->phy_id, MII_BMCR);
1307 status &= (~BMCR_ISOLATE);
1308
1309 mdio_write(ioaddr, mii_if->phy_id, MII_BMCR, status);
1310 status = mdio_read_latched(ioaddr, mii_if->phy_id, MII_BMSR);
1311
1312 return status;
1313 }
1314
1315 static void sis190_init_phy(struct net_device *dev, struct sis190_private *tp,
1316 struct sis190_phy *phy, unsigned int phy_id,
1317 u16 mii_status)
1318 {
1319 void __iomem *ioaddr = tp->mmio_addr;
1320 struct mii_chip_info *p;
1321
1322 INIT_LIST_HEAD(&phy->list);
1323 phy->status = mii_status;
1324 phy->phy_id = phy_id;
1325
1326 phy->id[0] = mdio_read(ioaddr, phy_id, MII_PHYSID1);
1327 phy->id[1] = mdio_read(ioaddr, phy_id, MII_PHYSID2);
1328
1329 for (p = mii_chip_table; p->type; p++) {
1330 if ((p->id[0] == phy->id[0]) &&
1331 (p->id[1] == (phy->id[1] & 0xfff0))) {
1332 break;
1333 }
1334 }
1335
1336 if (p->id[1]) {
1337 phy->type = (p->type == MIX) ?
1338 ((mii_status & (BMSR_100FULL | BMSR_100HALF)) ?
1339 LAN : HOME) : p->type;
1340 tp->features |= p->feature;
1341 if (netif_msg_probe(tp))
1342 pr_info("%s: %s transceiver at address %d\n",
1343 pci_name(tp->pci_dev), p->name, phy_id);
1344 } else {
1345 phy->type = UNKNOWN;
1346 if (netif_msg_probe(tp))
1347 pr_info("%s: unknown PHY 0x%x:0x%x transceiver at address %d\n",
1348 pci_name(tp->pci_dev),
1349 phy->id[0], (phy->id[1] & 0xfff0), phy_id);
1350 }
1351 }
1352
1353 static void sis190_mii_probe_88e1111_fixup(struct sis190_private *tp)
1354 {
1355 if (tp->features & F_PHY_88E1111) {
1356 void __iomem *ioaddr = tp->mmio_addr;
1357 int phy_id = tp->mii_if.phy_id;
1358 u16 reg[2][2] = {
1359 { 0x808b, 0x0ce1 },
1360 { 0x808f, 0x0c60 }
1361 }, *p;
1362
1363 p = (tp->features & F_HAS_RGMII) ? reg[0] : reg[1];
1364
1365 mdio_write(ioaddr, phy_id, 0x1b, p[0]);
1366 udelay(200);
1367 mdio_write(ioaddr, phy_id, 0x14, p[1]);
1368 udelay(200);
1369 }
1370 }
1371
1372 /**
1373 * sis190_mii_probe - Probe MII PHY for sis190
1374 * @dev: the net device to probe for
1375 *
1376 * Search for total of 32 possible mii phy addresses.
1377 * Identify and set current phy if found one,
1378 * return error if it failed to found.
1379 */
1380 static int sis190_mii_probe(struct net_device *dev)
1381 {
1382 struct sis190_private *tp = netdev_priv(dev);
1383 struct mii_if_info *mii_if = &tp->mii_if;
1384 void __iomem *ioaddr = tp->mmio_addr;
1385 int phy_id;
1386 int rc = 0;
1387
1388 INIT_LIST_HEAD(&tp->first_phy);
1389
1390 for (phy_id = 0; phy_id < PHY_MAX_ADDR; phy_id++) {
1391 struct sis190_phy *phy;
1392 u16 status;
1393
1394 status = mdio_read_latched(ioaddr, phy_id, MII_BMSR);
1395
1396 // Try next mii if the current one is not accessible.
1397 if (status == 0xffff || status == 0x0000)
1398 continue;
1399
1400 phy = kmalloc(sizeof(*phy), GFP_KERNEL);
1401 if (!phy) {
1402 sis190_free_phy(&tp->first_phy);
1403 rc = -ENOMEM;
1404 goto out;
1405 }
1406
1407 sis190_init_phy(dev, tp, phy, phy_id, status);
1408
1409 list_add(&tp->first_phy, &phy->list);
1410 }
1411
1412 if (list_empty(&tp->first_phy)) {
1413 if (netif_msg_probe(tp))
1414 pr_info("%s: No MII transceivers found!\n",
1415 pci_name(tp->pci_dev));
1416 rc = -EIO;
1417 goto out;
1418 }
1419
1420 /* Select default PHY for mac */
1421 sis190_default_phy(dev);
1422
1423 sis190_mii_probe_88e1111_fixup(tp);
1424
1425 mii_if->dev = dev;
1426 mii_if->mdio_read = __mdio_read;
1427 mii_if->mdio_write = __mdio_write;
1428 mii_if->phy_id_mask = PHY_ID_ANY;
1429 mii_if->reg_num_mask = MII_REG_ANY;
1430 out:
1431 return rc;
1432 }
1433
1434 static void sis190_mii_remove(struct net_device *dev)
1435 {
1436 struct sis190_private *tp = netdev_priv(dev);
1437
1438 sis190_free_phy(&tp->first_phy);
1439 }
1440
1441 static void sis190_release_board(struct pci_dev *pdev)
1442 {
1443 struct net_device *dev = pci_get_drvdata(pdev);
1444 struct sis190_private *tp = netdev_priv(dev);
1445
1446 iounmap(tp->mmio_addr);
1447 pci_release_regions(pdev);
1448 pci_disable_device(pdev);
1449 free_netdev(dev);
1450 }
1451
1452 static struct net_device *sis190_init_board(struct pci_dev *pdev)
1453 {
1454 struct sis190_private *tp;
1455 struct net_device *dev;
1456 void __iomem *ioaddr;
1457 int rc;
1458
1459 dev = alloc_etherdev(sizeof(*tp));
1460 if (!dev) {
1461 rc = -ENOMEM;
1462 goto err_out_0;
1463 }
1464
1465 SET_NETDEV_DEV(dev, &pdev->dev);
1466
1467 tp = netdev_priv(dev);
1468 tp->dev = dev;
1469 tp->msg_enable = netif_msg_init(debug.msg_enable, SIS190_MSG_DEFAULT);
1470
1471 rc = pci_enable_device(pdev);
1472 if (rc < 0) {
1473 if (netif_msg_probe(tp))
1474 pr_err("%s: enable failure\n", pci_name(pdev));
1475 goto err_free_dev_1;
1476 }
1477
1478 rc = -ENODEV;
1479
1480 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
1481 if (netif_msg_probe(tp))
1482 pr_err("%s: region #0 is no MMIO resource\n",
1483 pci_name(pdev));
1484 goto err_pci_disable_2;
1485 }
1486 if (pci_resource_len(pdev, 0) < SIS190_REGS_SIZE) {
1487 if (netif_msg_probe(tp))
1488 pr_err("%s: invalid PCI region size(s)\n",
1489 pci_name(pdev));
1490 goto err_pci_disable_2;
1491 }
1492
1493 rc = pci_request_regions(pdev, DRV_NAME);
1494 if (rc < 0) {
1495 if (netif_msg_probe(tp))
1496 pr_err("%s: could not request regions\n",
1497 pci_name(pdev));
1498 goto err_pci_disable_2;
1499 }
1500
1501 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1502 if (rc < 0) {
1503 if (netif_msg_probe(tp))
1504 pr_err("%s: DMA configuration failed\n",
1505 pci_name(pdev));
1506 goto err_free_res_3;
1507 }
1508
1509 pci_set_master(pdev);
1510
1511 ioaddr = ioremap(pci_resource_start(pdev, 0), SIS190_REGS_SIZE);
1512 if (!ioaddr) {
1513 if (netif_msg_probe(tp))
1514 pr_err("%s: cannot remap MMIO, aborting\n",
1515 pci_name(pdev));
1516 rc = -EIO;
1517 goto err_free_res_3;
1518 }
1519
1520 tp->pci_dev = pdev;
1521 tp->mmio_addr = ioaddr;
1522 tp->link_status = LNK_OFF;
1523
1524 sis190_irq_mask_and_ack(ioaddr);
1525
1526 sis190_soft_reset(ioaddr);
1527 out:
1528 return dev;
1529
1530 err_free_res_3:
1531 pci_release_regions(pdev);
1532 err_pci_disable_2:
1533 pci_disable_device(pdev);
1534 err_free_dev_1:
1535 free_netdev(dev);
1536 err_out_0:
1537 dev = ERR_PTR(rc);
1538 goto out;
1539 }
1540
1541 static void sis190_tx_timeout(struct net_device *dev, unsigned int txqueue)
1542 {
1543 struct sis190_private *tp = netdev_priv(dev);
1544 void __iomem *ioaddr = tp->mmio_addr;
1545 u8 tmp8;
1546
1547 /* Disable Tx, if not already */
1548 tmp8 = SIS_R8(TxControl);
1549 if (tmp8 & CmdTxEnb)
1550 SIS_W8(TxControl, tmp8 & ~CmdTxEnb);
1551
1552 netif_info(tp, tx_err, dev, "Transmit timeout, status %08x %08x\n",
1553 SIS_R32(TxControl), SIS_R32(TxSts));
1554
1555 /* Disable interrupts by clearing the interrupt mask. */
1556 SIS_W32(IntrMask, 0x0000);
1557
1558 /* Stop a shared interrupt from scavenging while we are. */
1559 spin_lock_irq(&tp->lock);
1560 sis190_tx_clear(tp);
1561 spin_unlock_irq(&tp->lock);
1562
1563 /* ...and finally, reset everything. */
1564 sis190_hw_start(dev);
1565
1566 netif_wake_queue(dev);
1567 }
1568
1569 static void sis190_set_rgmii(struct sis190_private *tp, u8 reg)
1570 {
1571 tp->features |= (reg & 0x80) ? F_HAS_RGMII : 0;
1572 }
1573
1574 static int sis190_get_mac_addr_from_eeprom(struct pci_dev *pdev,
1575 struct net_device *dev)
1576 {
1577 struct sis190_private *tp = netdev_priv(dev);
1578 void __iomem *ioaddr = tp->mmio_addr;
1579 u16 sig;
1580 int i;
1581
1582 if (netif_msg_probe(tp))
1583 pr_info("%s: Read MAC address from EEPROM\n", pci_name(pdev));
1584
1585 /* Check to see if there is a sane EEPROM */
1586 sig = (u16) sis190_read_eeprom(ioaddr, EEPROMSignature);
1587
1588 if ((sig == 0xffff) || (sig == 0x0000)) {
1589 if (netif_msg_probe(tp))
1590 pr_info("%s: Error EEPROM read %x\n",
1591 pci_name(pdev), sig);
1592 return -EIO;
1593 }
1594
1595 /* Get MAC address from EEPROM */
1596 for (i = 0; i < ETH_ALEN / 2; i++) {
1597 u16 w = sis190_read_eeprom(ioaddr, EEPROMMACAddr + i);
1598
1599 ((__le16 *)dev->dev_addr)[i] = cpu_to_le16(w);
1600 }
1601
1602 sis190_set_rgmii(tp, sis190_read_eeprom(ioaddr, EEPROMInfo));
1603
1604 return 0;
1605 }
1606
1607 /**
1608 * sis190_get_mac_addr_from_apc - Get MAC address for SiS96x model
1609 * @pdev: PCI device
1610 * @dev: network device to get address for
1611 *
1612 * SiS96x model, use APC CMOS RAM to store MAC address.
1613 * APC CMOS RAM is accessed through ISA bridge.
1614 * MAC address is read into @net_dev->dev_addr.
1615 */
1616 static int sis190_get_mac_addr_from_apc(struct pci_dev *pdev,
1617 struct net_device *dev)
1618 {
1619 static const u16 ids[] = { 0x0965, 0x0966, 0x0968 };
1620 struct sis190_private *tp = netdev_priv(dev);
1621 struct pci_dev *isa_bridge;
1622 u8 reg, tmp8;
1623 unsigned int i;
1624
1625 if (netif_msg_probe(tp))
1626 pr_info("%s: Read MAC address from APC\n", pci_name(pdev));
1627
1628 for (i = 0; i < ARRAY_SIZE(ids); i++) {
1629 isa_bridge = pci_get_device(PCI_VENDOR_ID_SI, ids[i], NULL);
1630 if (isa_bridge)
1631 break;
1632 }
1633
1634 if (!isa_bridge) {
1635 if (netif_msg_probe(tp))
1636 pr_info("%s: Can not find ISA bridge\n",
1637 pci_name(pdev));
1638 return -EIO;
1639 }
1640
1641 /* Enable port 78h & 79h to access APC Registers. */
1642 pci_read_config_byte(isa_bridge, 0x48, &tmp8);
1643 reg = (tmp8 & ~0x02);
1644 pci_write_config_byte(isa_bridge, 0x48, reg);
1645 udelay(50);
1646 pci_read_config_byte(isa_bridge, 0x48, &reg);
1647
1648 for (i = 0; i < ETH_ALEN; i++) {
1649 outb(0x9 + i, 0x78);
1650 dev->dev_addr[i] = inb(0x79);
1651 }
1652
1653 outb(0x12, 0x78);
1654 reg = inb(0x79);
1655
1656 sis190_set_rgmii(tp, reg);
1657
1658 /* Restore the value to ISA Bridge */
1659 pci_write_config_byte(isa_bridge, 0x48, tmp8);
1660 pci_dev_put(isa_bridge);
1661
1662 return 0;
1663 }
1664
1665 /**
1666 * sis190_init_rxfilter - Initialize the Rx filter
1667 * @dev: network device to initialize
1668 *
1669 * Set receive filter address to our MAC address
1670 * and enable packet filtering.
1671 */
1672 static inline void sis190_init_rxfilter(struct net_device *dev)
1673 {
1674 struct sis190_private *tp = netdev_priv(dev);
1675 void __iomem *ioaddr = tp->mmio_addr;
1676 u16 ctl;
1677 int i;
1678
1679 ctl = SIS_R16(RxMacControl);
1680 /*
1681 * Disable packet filtering before setting filter.
1682 * Note: SiS's driver writes 32 bits but RxMacControl is 16 bits
1683 * only and followed by RxMacAddr (6 bytes). Strange. -- FR
1684 */
1685 SIS_W16(RxMacControl, ctl & ~0x0f00);
1686
1687 for (i = 0; i < ETH_ALEN; i++)
1688 SIS_W8(RxMacAddr + i, dev->dev_addr[i]);
1689
1690 SIS_W16(RxMacControl, ctl);
1691 SIS_PCI_COMMIT();
1692 }
1693
1694 static int sis190_get_mac_addr(struct pci_dev *pdev, struct net_device *dev)
1695 {
1696 int rc;
1697
1698 rc = sis190_get_mac_addr_from_eeprom(pdev, dev);
1699 if (rc < 0) {
1700 u8 reg;
1701
1702 pci_read_config_byte(pdev, 0x73, &reg);
1703
1704 if (reg & 0x00000001)
1705 rc = sis190_get_mac_addr_from_apc(pdev, dev);
1706 }
1707 return rc;
1708 }
1709
1710 static void sis190_set_speed_auto(struct net_device *dev)
1711 {
1712 struct sis190_private *tp = netdev_priv(dev);
1713 void __iomem *ioaddr = tp->mmio_addr;
1714 int phy_id = tp->mii_if.phy_id;
1715 int val;
1716
1717 netif_info(tp, link, dev, "Enabling Auto-negotiation\n");
1718
1719 val = mdio_read(ioaddr, phy_id, MII_ADVERTISE);
1720
1721 // Enable 10/100 Full/Half Mode, leave MII_ADVERTISE bit4:0
1722 // unchanged.
1723 mdio_write(ioaddr, phy_id, MII_ADVERTISE, (val & ADVERTISE_SLCT) |
1724 ADVERTISE_100FULL | ADVERTISE_10FULL |
1725 ADVERTISE_100HALF | ADVERTISE_10HALF);
1726
1727 // Enable 1000 Full Mode.
1728 mdio_write(ioaddr, phy_id, MII_CTRL1000, ADVERTISE_1000FULL);
1729
1730 // Enable auto-negotiation and restart auto-negotiation.
1731 mdio_write(ioaddr, phy_id, MII_BMCR,
1732 BMCR_ANENABLE | BMCR_ANRESTART | BMCR_RESET);
1733 }
1734
1735 static int sis190_get_link_ksettings(struct net_device *dev,
1736 struct ethtool_link_ksettings *cmd)
1737 {
1738 struct sis190_private *tp = netdev_priv(dev);
1739
1740 mii_ethtool_get_link_ksettings(&tp->mii_if, cmd);
1741
1742 return 0;
1743 }
1744
1745 static int sis190_set_link_ksettings(struct net_device *dev,
1746 const struct ethtool_link_ksettings *cmd)
1747 {
1748 struct sis190_private *tp = netdev_priv(dev);
1749
1750 return mii_ethtool_set_link_ksettings(&tp->mii_if, cmd);
1751 }
1752
1753 static void sis190_get_drvinfo(struct net_device *dev,
1754 struct ethtool_drvinfo *info)
1755 {
1756 struct sis190_private *tp = netdev_priv(dev);
1757
1758 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
1759 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
1760 strlcpy(info->bus_info, pci_name(tp->pci_dev),
1761 sizeof(info->bus_info));
1762 }
1763
1764 static int sis190_get_regs_len(struct net_device *dev)
1765 {
1766 return SIS190_REGS_SIZE;
1767 }
1768
1769 static void sis190_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1770 void *p)
1771 {
1772 struct sis190_private *tp = netdev_priv(dev);
1773 unsigned long flags;
1774
1775 spin_lock_irqsave(&tp->lock, flags);
1776 memcpy_fromio(p, tp->mmio_addr, regs->len);
1777 spin_unlock_irqrestore(&tp->lock, flags);
1778 }
1779
1780 static int sis190_nway_reset(struct net_device *dev)
1781 {
1782 struct sis190_private *tp = netdev_priv(dev);
1783
1784 return mii_nway_restart(&tp->mii_if);
1785 }
1786
1787 static u32 sis190_get_msglevel(struct net_device *dev)
1788 {
1789 struct sis190_private *tp = netdev_priv(dev);
1790
1791 return tp->msg_enable;
1792 }
1793
1794 static void sis190_set_msglevel(struct net_device *dev, u32 value)
1795 {
1796 struct sis190_private *tp = netdev_priv(dev);
1797
1798 tp->msg_enable = value;
1799 }
1800
1801 static const struct ethtool_ops sis190_ethtool_ops = {
1802 .get_drvinfo = sis190_get_drvinfo,
1803 .get_regs_len = sis190_get_regs_len,
1804 .get_regs = sis190_get_regs,
1805 .get_link = ethtool_op_get_link,
1806 .get_msglevel = sis190_get_msglevel,
1807 .set_msglevel = sis190_set_msglevel,
1808 .nway_reset = sis190_nway_reset,
1809 .get_link_ksettings = sis190_get_link_ksettings,
1810 .set_link_ksettings = sis190_set_link_ksettings,
1811 };
1812
1813 static int sis190_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1814 {
1815 struct sis190_private *tp = netdev_priv(dev);
1816
1817 return !netif_running(dev) ? -EINVAL :
1818 generic_mii_ioctl(&tp->mii_if, if_mii(ifr), cmd, NULL);
1819 }
1820
1821 static int sis190_mac_addr(struct net_device *dev, void *p)
1822 {
1823 int rc;
1824
1825 rc = eth_mac_addr(dev, p);
1826 if (!rc)
1827 sis190_init_rxfilter(dev);
1828 return rc;
1829 }
1830
1831 static const struct net_device_ops sis190_netdev_ops = {
1832 .ndo_open = sis190_open,
1833 .ndo_stop = sis190_close,
1834 .ndo_do_ioctl = sis190_ioctl,
1835 .ndo_start_xmit = sis190_start_xmit,
1836 .ndo_tx_timeout = sis190_tx_timeout,
1837 .ndo_set_rx_mode = sis190_set_rx_mode,
1838 .ndo_set_mac_address = sis190_mac_addr,
1839 .ndo_validate_addr = eth_validate_addr,
1840 #ifdef CONFIG_NET_POLL_CONTROLLER
1841 .ndo_poll_controller = sis190_netpoll,
1842 #endif
1843 };
1844
1845 static int sis190_init_one(struct pci_dev *pdev,
1846 const struct pci_device_id *ent)
1847 {
1848 static int printed_version = 0;
1849 struct sis190_private *tp;
1850 struct net_device *dev;
1851 void __iomem *ioaddr;
1852 int rc;
1853
1854 if (!printed_version) {
1855 if (netif_msg_drv(&debug))
1856 pr_info(SIS190_DRIVER_NAME " loaded\n");
1857 printed_version = 1;
1858 }
1859
1860 dev = sis190_init_board(pdev);
1861 if (IS_ERR(dev)) {
1862 rc = PTR_ERR(dev);
1863 goto out;
1864 }
1865
1866 pci_set_drvdata(pdev, dev);
1867
1868 tp = netdev_priv(dev);
1869 ioaddr = tp->mmio_addr;
1870
1871 rc = sis190_get_mac_addr(pdev, dev);
1872 if (rc < 0)
1873 goto err_release_board;
1874
1875 sis190_init_rxfilter(dev);
1876
1877 INIT_WORK(&tp->phy_task, sis190_phy_task);
1878
1879 dev->netdev_ops = &sis190_netdev_ops;
1880
1881 dev->ethtool_ops = &sis190_ethtool_ops;
1882 dev->watchdog_timeo = SIS190_TX_TIMEOUT;
1883
1884 spin_lock_init(&tp->lock);
1885
1886 rc = sis190_mii_probe(dev);
1887 if (rc < 0)
1888 goto err_release_board;
1889
1890 rc = register_netdev(dev);
1891 if (rc < 0)
1892 goto err_remove_mii;
1893
1894 if (netif_msg_probe(tp)) {
1895 netdev_info(dev, "%s: %s at %p (IRQ: %d), %pM\n",
1896 pci_name(pdev),
1897 sis_chip_info[ent->driver_data].name,
1898 ioaddr, pdev->irq, dev->dev_addr);
1899 netdev_info(dev, "%s mode.\n",
1900 (tp->features & F_HAS_RGMII) ? "RGMII" : "GMII");
1901 }
1902
1903 netif_carrier_off(dev);
1904
1905 sis190_set_speed_auto(dev);
1906 out:
1907 return rc;
1908
1909 err_remove_mii:
1910 sis190_mii_remove(dev);
1911 err_release_board:
1912 sis190_release_board(pdev);
1913 goto out;
1914 }
1915
1916 static void sis190_remove_one(struct pci_dev *pdev)
1917 {
1918 struct net_device *dev = pci_get_drvdata(pdev);
1919 struct sis190_private *tp = netdev_priv(dev);
1920
1921 sis190_mii_remove(dev);
1922 cancel_work_sync(&tp->phy_task);
1923 unregister_netdev(dev);
1924 sis190_release_board(pdev);
1925 }
1926
1927 static struct pci_driver sis190_pci_driver = {
1928 .name = DRV_NAME,
1929 .id_table = sis190_pci_tbl,
1930 .probe = sis190_init_one,
1931 .remove = sis190_remove_one,
1932 };
1933
1934 module_pci_driver(sis190_pci_driver);
Linux with added FPC-III support