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x86: fix bootup crash in native_read_tsc()
[wrt350n-kernel.git] / drivers / net / sis190.c
blobb570402f7feda2a06fc975a5aaf82e19b1f45432
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 #include <linux/module.h>
23 #include <linux/moduleparam.h>
24 #include <linux/netdevice.h>
25 #include <linux/rtnetlink.h>
26 #include <linux/etherdevice.h>
27 #include <linux/ethtool.h>
28 #include <linux/pci.h>
29 #include <linux/mii.h>
30 #include <linux/delay.h>
31 #include <linux/crc32.h>
32 #include <linux/dma-mapping.h>
33 #include <asm/irq.h>
34
35 #define net_drv(p, arg...) if (netif_msg_drv(p)) \
36 printk(arg)
37 #define net_probe(p, arg...) if (netif_msg_probe(p)) \
38 printk(arg)
39 #define net_link(p, arg...) if (netif_msg_link(p)) \
40 printk(arg)
41 #define net_intr(p, arg...) if (netif_msg_intr(p)) \
42 printk(arg)
43 #define net_tx_err(p, arg...) if (netif_msg_tx_err(p)) \
44 printk(arg)
45
46 #define PHY_MAX_ADDR 32
47 #define PHY_ID_ANY 0x1f
48 #define MII_REG_ANY 0x1f
49
50 #define DRV_VERSION "1.2"
51 #define DRV_NAME "sis190"
52 #define SIS190_DRIVER_NAME DRV_NAME " Gigabit Ethernet driver " DRV_VERSION
53 #define PFX DRV_NAME ": "
54
55 #define sis190_rx_skb netif_rx
56 #define sis190_rx_quota(count, quota) count
57
58 #define MAC_ADDR_LEN 6
59
60 #define NUM_TX_DESC 64 /* [8..1024] */
61 #define NUM_RX_DESC 64 /* [8..8192] */
62 #define TX_RING_BYTES (NUM_TX_DESC * sizeof(struct TxDesc))
63 #define RX_RING_BYTES (NUM_RX_DESC * sizeof(struct RxDesc))
64 #define RX_BUF_SIZE 1536
65 #define RX_BUF_MASK 0xfff8
66
67 #define SIS190_REGS_SIZE 0x80
68 #define SIS190_TX_TIMEOUT (6*HZ)
69 #define SIS190_PHY_TIMEOUT (10*HZ)
70 #define SIS190_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | \
71 NETIF_MSG_LINK | NETIF_MSG_IFUP | \
72 NETIF_MSG_IFDOWN)
73
74 /* Enhanced PHY access register bit definitions */
75 #define EhnMIIread 0x0000
76 #define EhnMIIwrite 0x0020
77 #define EhnMIIdataShift 16
78 #define EhnMIIpmdShift 6 /* 7016 only */
79 #define EhnMIIregShift 11
80 #define EhnMIIreq 0x0010
81 #define EhnMIInotDone 0x0010
82
83 /* Write/read MMIO register */
84 #define SIS_W8(reg, val) writeb ((val), ioaddr + (reg))
85 #define SIS_W16(reg, val) writew ((val), ioaddr + (reg))
86 #define SIS_W32(reg, val) writel ((val), ioaddr + (reg))
87 #define SIS_R8(reg) readb (ioaddr + (reg))
88 #define SIS_R16(reg) readw (ioaddr + (reg))
89 #define SIS_R32(reg) readl (ioaddr + (reg))
90
91 #define SIS_PCI_COMMIT() SIS_R32(IntrControl)
92
93 enum sis190_registers {
94 TxControl = 0x00,
95 TxDescStartAddr = 0x04,
96 rsv0 = 0x08, // reserved
97 TxSts = 0x0c, // unused (Control/Status)
98 RxControl = 0x10,
99 RxDescStartAddr = 0x14,
100 rsv1 = 0x18, // reserved
101 RxSts = 0x1c, // unused
102 IntrStatus = 0x20,
103 IntrMask = 0x24,
104 IntrControl = 0x28,
105 IntrTimer = 0x2c, // unused (Interupt Timer)
106 PMControl = 0x30, // unused (Power Mgmt Control/Status)
107 rsv2 = 0x34, // reserved
108 ROMControl = 0x38,
109 ROMInterface = 0x3c,
110 StationControl = 0x40,
111 GMIIControl = 0x44,
112 GIoCR = 0x48, // unused (GMAC IO Compensation)
113 GIoCtrl = 0x4c, // unused (GMAC IO Control)
114 TxMacControl = 0x50,
115 TxLimit = 0x54, // unused (Tx MAC Timer/TryLimit)
116 RGDelay = 0x58, // unused (RGMII Tx Internal Delay)
117 rsv3 = 0x5c, // reserved
118 RxMacControl = 0x60,
119 RxMacAddr = 0x62,
120 RxHashTable = 0x68,
121 // Undocumented = 0x6c,
122 RxWolCtrl = 0x70,
123 RxWolData = 0x74, // unused (Rx WOL Data Access)
124 RxMPSControl = 0x78, // unused (Rx MPS Control)
125 rsv4 = 0x7c, // reserved
126 };
127
128 enum sis190_register_content {
129 /* IntrStatus */
130 SoftInt = 0x40000000, // unused
131 Timeup = 0x20000000, // unused
132 PauseFrame = 0x00080000, // unused
133 MagicPacket = 0x00040000, // unused
134 WakeupFrame = 0x00020000, // unused
135 LinkChange = 0x00010000,
136 RxQEmpty = 0x00000080,
137 RxQInt = 0x00000040,
138 TxQ1Empty = 0x00000020, // unused
139 TxQ1Int = 0x00000010,
140 TxQ0Empty = 0x00000008, // unused
141 TxQ0Int = 0x00000004,
142 RxHalt = 0x00000002,
143 TxHalt = 0x00000001,
144
145 /* {Rx/Tx}CmdBits */
146 CmdReset = 0x10,
147 CmdRxEnb = 0x08, // unused
148 CmdTxEnb = 0x01,
149 RxBufEmpty = 0x01, // unused
150
151 /* Cfg9346Bits */
152 Cfg9346_Lock = 0x00, // unused
153 Cfg9346_Unlock = 0xc0, // unused
154
155 /* RxMacControl */
156 AcceptErr = 0x20, // unused
157 AcceptRunt = 0x10, // unused
158 AcceptBroadcast = 0x0800,
159 AcceptMulticast = 0x0400,
160 AcceptMyPhys = 0x0200,
161 AcceptAllPhys = 0x0100,
162
163 /* RxConfigBits */
164 RxCfgFIFOShift = 13,
165 RxCfgDMAShift = 8, // 0x1a in RxControl ?
166
167 /* TxConfigBits */
168 TxInterFrameGapShift = 24,
169 TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
170
171 LinkStatus = 0x02, // unused
172 FullDup = 0x01, // unused
173
174 /* TBICSRBit */
175 TBILinkOK = 0x02000000, // unused
176 };
177
178 struct TxDesc {
179 __le32 PSize;
180 __le32 status;
181 __le32 addr;
182 __le32 size;
183 };
184
185 struct RxDesc {
186 __le32 PSize;
187 __le32 status;
188 __le32 addr;
189 __le32 size;
190 };
191
192 enum _DescStatusBit {
193 /* _Desc.status */
194 OWNbit = 0x80000000, // RXOWN/TXOWN
195 INTbit = 0x40000000, // RXINT/TXINT
196 CRCbit = 0x00020000, // CRCOFF/CRCEN
197 PADbit = 0x00010000, // PREADD/PADEN
198 /* _Desc.size */
199 RingEnd = 0x80000000,
200 /* TxDesc.status */
201 LSEN = 0x08000000, // TSO ? -- FR
202 IPCS = 0x04000000,
203 TCPCS = 0x02000000,
204 UDPCS = 0x01000000,
205 BSTEN = 0x00800000,
206 EXTEN = 0x00400000,
207 DEFEN = 0x00200000,
208 BKFEN = 0x00100000,
209 CRSEN = 0x00080000,
210 COLEN = 0x00040000,
211 THOL3 = 0x30000000,
212 THOL2 = 0x20000000,
213 THOL1 = 0x10000000,
214 THOL0 = 0x00000000,
215 /* RxDesc.status */
216 IPON = 0x20000000,
217 TCPON = 0x10000000,
218 UDPON = 0x08000000,
219 Wakup = 0x00400000,
220 Magic = 0x00200000,
221 Pause = 0x00100000,
222 DEFbit = 0x00200000,
223 BCAST = 0x000c0000,
224 MCAST = 0x00080000,
225 UCAST = 0x00040000,
226 /* RxDesc.PSize */
227 TAGON = 0x80000000,
228 RxDescCountMask = 0x7f000000, // multi-desc pkt when > 1 ? -- FR
229 ABORT = 0x00800000,
230 SHORT = 0x00400000,
231 LIMIT = 0x00200000,
232 MIIER = 0x00100000,
233 OVRUN = 0x00080000,
234 NIBON = 0x00040000,
235 COLON = 0x00020000,
236 CRCOK = 0x00010000,
237 RxSizeMask = 0x0000ffff
238 /*
239 * The asic could apparently do vlan, TSO, jumbo (sis191 only) and
240 * provide two (unused with Linux) Tx queues. No publically
241 * available documentation alas.
242 */
243 };
244
245 enum sis190_eeprom_access_register_bits {
246 EECS = 0x00000001, // unused
247 EECLK = 0x00000002, // unused
248 EEDO = 0x00000008, // unused
249 EEDI = 0x00000004, // unused
250 EEREQ = 0x00000080,
251 EEROP = 0x00000200,
252 EEWOP = 0x00000100 // unused
253 };
254
255 /* EEPROM Addresses */
256 enum sis190_eeprom_address {
257 EEPROMSignature = 0x00,
258 EEPROMCLK = 0x01, // unused
259 EEPROMInfo = 0x02,
260 EEPROMMACAddr = 0x03
261 };
262
263 enum sis190_feature {
264 F_HAS_RGMII = 1,
265 F_PHY_88E1111 = 2,
266 F_PHY_BCM5461 = 4
267 };
268
269 struct sis190_private {
270 void __iomem *mmio_addr;
271 struct pci_dev *pci_dev;
272 struct net_device *dev;
273 spinlock_t lock;
274 u32 rx_buf_sz;
275 u32 cur_rx;
276 u32 cur_tx;
277 u32 dirty_rx;
278 u32 dirty_tx;
279 dma_addr_t rx_dma;
280 dma_addr_t tx_dma;
281 struct RxDesc *RxDescRing;
282 struct TxDesc *TxDescRing;
283 struct sk_buff *Rx_skbuff[NUM_RX_DESC];
284 struct sk_buff *Tx_skbuff[NUM_TX_DESC];
285 struct work_struct phy_task;
286 struct timer_list timer;
287 u32 msg_enable;
288 struct mii_if_info mii_if;
289 struct list_head first_phy;
290 u32 features;
291 };
292
293 struct sis190_phy {
294 struct list_head list;
295 int phy_id;
296 u16 id[2];
297 u16 status;
298 u8 type;
299 };
300
301 enum sis190_phy_type {
302 UNKNOWN = 0x00,
303 HOME = 0x01,
304 LAN = 0x02,
305 MIX = 0x03
306 };
307
308 static struct mii_chip_info {
309 const char *name;
310 u16 id[2];
311 unsigned int type;
312 u32 feature;
313 } mii_chip_table[] = {
314 { "Broadcom PHY BCM5461", { 0x0020, 0x60c0 }, LAN, F_PHY_BCM5461 },
315 { "Broadcom PHY AC131", { 0x0143, 0xbc70 }, LAN, 0 },
316 { "Agere PHY ET1101B", { 0x0282, 0xf010 }, LAN, 0 },
317 { "Marvell PHY 88E1111", { 0x0141, 0x0cc0 }, LAN, F_PHY_88E1111 },
318 { "Realtek PHY RTL8201", { 0x0000, 0x8200 }, LAN, 0 },
319 { NULL, }
320 };
321
322 static const struct {
323 const char *name;
324 } sis_chip_info[] = {
325 { "SiS 190 PCI Fast Ethernet adapter" },
326 { "SiS 191 PCI Gigabit Ethernet adapter" },
327 };
328
329 static struct pci_device_id sis190_pci_tbl[] __devinitdata = {
330 { PCI_DEVICE(PCI_VENDOR_ID_SI, 0x0190), 0, 0, 0 },
331 { PCI_DEVICE(PCI_VENDOR_ID_SI, 0x0191), 0, 0, 1 },
332 { 0, },
333 };
334
335 MODULE_DEVICE_TABLE(pci, sis190_pci_tbl);
336
337 static int rx_copybreak = 200;
338
339 static struct {
340 u32 msg_enable;
341 } debug = { -1 };
342
343 MODULE_DESCRIPTION("SiS sis190 Gigabit Ethernet driver");
344 module_param(rx_copybreak, int, 0);
345 MODULE_PARM_DESC(rx_copybreak, "Copy breakpoint for copy-only-tiny-frames");
346 module_param_named(debug, debug.msg_enable, int, 0);
347 MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., 16=all)");
348 MODULE_AUTHOR("K.M. Liu <kmliu@sis.com>, Ueimor <romieu@fr.zoreil.com>");
349 MODULE_VERSION(DRV_VERSION);
350 MODULE_LICENSE("GPL");
351
352 static const u32 sis190_intr_mask =
353 RxQEmpty | RxQInt | TxQ1Int | TxQ0Int | RxHalt | TxHalt | LinkChange;
354
355 /*
356 * Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
357 * The chips use a 64 element hash table based on the Ethernet CRC.
358 */
359 static const int multicast_filter_limit = 32;
360
361 static void __mdio_cmd(void __iomem *ioaddr, u32 ctl)
362 {
363 unsigned int i;
364
365 SIS_W32(GMIIControl, ctl);
366
367 msleep(1);
368
369 for (i = 0; i < 100; i++) {
370 if (!(SIS_R32(GMIIControl) & EhnMIInotDone))
371 break;
372 msleep(1);
373 }
374
375 if (i > 99)
376 printk(KERN_ERR PFX "PHY command failed !\n");
377 }
378
379 static void mdio_write(void __iomem *ioaddr, int phy_id, int reg, int val)
380 {
381 __mdio_cmd(ioaddr, EhnMIIreq | EhnMIIwrite |
382 (((u32) reg) << EhnMIIregShift) | (phy_id << EhnMIIpmdShift) |
383 (((u32) val) << EhnMIIdataShift));
384 }
385
386 static int mdio_read(void __iomem *ioaddr, int phy_id, int reg)
387 {
388 __mdio_cmd(ioaddr, EhnMIIreq | EhnMIIread |
389 (((u32) reg) << EhnMIIregShift) | (phy_id << EhnMIIpmdShift));
390
391 return (u16) (SIS_R32(GMIIControl) >> EhnMIIdataShift);
392 }
393
394 static void __mdio_write(struct net_device *dev, int phy_id, int reg, int val)
395 {
396 struct sis190_private *tp = netdev_priv(dev);
397
398 mdio_write(tp->mmio_addr, phy_id, reg, val);
399 }
400
401 static int __mdio_read(struct net_device *dev, int phy_id, int reg)
402 {
403 struct sis190_private *tp = netdev_priv(dev);
404
405 return mdio_read(tp->mmio_addr, phy_id, reg);
406 }
407
408 static u16 mdio_read_latched(void __iomem *ioaddr, int phy_id, int reg)
409 {
410 mdio_read(ioaddr, phy_id, reg);
411 return mdio_read(ioaddr, phy_id, reg);
412 }
413
414 static u16 __devinit sis190_read_eeprom(void __iomem *ioaddr, u32 reg)
415 {
416 u16 data = 0xffff;
417 unsigned int i;
418
419 if (!(SIS_R32(ROMControl) & 0x0002))
420 return 0;
421
422 SIS_W32(ROMInterface, EEREQ | EEROP | (reg << 10));
423
424 for (i = 0; i < 200; i++) {
425 if (!(SIS_R32(ROMInterface) & EEREQ)) {
426 data = (SIS_R32(ROMInterface) & 0xffff0000) >> 16;
427 break;
428 }
429 msleep(1);
430 }
431
432 return data;
433 }
434
435 static void sis190_irq_mask_and_ack(void __iomem *ioaddr)
436 {
437 SIS_W32(IntrMask, 0x00);
438 SIS_W32(IntrStatus, 0xffffffff);
439 SIS_PCI_COMMIT();
440 }
441
442 static void sis190_asic_down(void __iomem *ioaddr)
443 {
444 /* Stop the chip's Tx and Rx DMA processes. */
445
446 SIS_W32(TxControl, 0x1a00);
447 SIS_W32(RxControl, 0x1a00);
448
449 sis190_irq_mask_and_ack(ioaddr);
450 }
451
452 static void sis190_mark_as_last_descriptor(struct RxDesc *desc)
453 {
454 desc->size |= cpu_to_le32(RingEnd);
455 }
456
457 static inline void sis190_give_to_asic(struct RxDesc *desc, u32 rx_buf_sz)
458 {
459 u32 eor = le32_to_cpu(desc->size) & RingEnd;
460
461 desc->PSize = 0x0;
462 desc->size = cpu_to_le32((rx_buf_sz & RX_BUF_MASK) | eor);
463 wmb();
464 desc->status = cpu_to_le32(OWNbit | INTbit);
465 }
466
467 static inline void sis190_map_to_asic(struct RxDesc *desc, dma_addr_t mapping,
468 u32 rx_buf_sz)
469 {
470 desc->addr = cpu_to_le32(mapping);
471 sis190_give_to_asic(desc, rx_buf_sz);
472 }
473
474 static inline void sis190_make_unusable_by_asic(struct RxDesc *desc)
475 {
476 desc->PSize = 0x0;
477 desc->addr = cpu_to_le32(0xdeadbeef);
478 desc->size &= cpu_to_le32(RingEnd);
479 wmb();
480 desc->status = 0x0;
481 }
482
483 static int sis190_alloc_rx_skb(struct pci_dev *pdev, struct sk_buff **sk_buff,
484 struct RxDesc *desc, u32 rx_buf_sz)
485 {
486 struct sk_buff *skb;
487 dma_addr_t mapping;
488 int ret = 0;
489
490 skb = dev_alloc_skb(rx_buf_sz);
491 if (!skb)
492 goto err_out;
493
494 *sk_buff = skb;
495
496 mapping = pci_map_single(pdev, skb->data, rx_buf_sz,
497 PCI_DMA_FROMDEVICE);
498
499 sis190_map_to_asic(desc, mapping, rx_buf_sz);
500 out:
501 return ret;
502
503 err_out:
504 ret = -ENOMEM;
505 sis190_make_unusable_by_asic(desc);
506 goto out;
507 }
508
509 static u32 sis190_rx_fill(struct sis190_private *tp, struct net_device *dev,
510 u32 start, u32 end)
511 {
512 u32 cur;
513
514 for (cur = start; cur < end; cur++) {
515 int ret, i = cur % NUM_RX_DESC;
516
517 if (tp->Rx_skbuff[i])
518 continue;
519
520 ret = sis190_alloc_rx_skb(tp->pci_dev, tp->Rx_skbuff + i,
521 tp->RxDescRing + i, tp->rx_buf_sz);
522 if (ret < 0)
523 break;
524 }
525 return cur - start;
526 }
527
528 static inline int sis190_try_rx_copy(struct sk_buff **sk_buff, int pkt_size,
529 struct RxDesc *desc, int rx_buf_sz)
530 {
531 int ret = -1;
532
533 if (pkt_size < rx_copybreak) {
534 struct sk_buff *skb;
535
536 skb = dev_alloc_skb(pkt_size + NET_IP_ALIGN);
537 if (skb) {
538 skb_reserve(skb, NET_IP_ALIGN);
539 skb_copy_to_linear_data(skb, sk_buff[0]->data, pkt_size);
540 *sk_buff = skb;
541 sis190_give_to_asic(desc, rx_buf_sz);
542 ret = 0;
543 }
544 }
545 return ret;
546 }
547
548 static inline int sis190_rx_pkt_err(u32 status, struct net_device_stats *stats)
549 {
550 #define ErrMask (OVRUN | SHORT | LIMIT | MIIER | NIBON | COLON | ABORT)
551
552 if ((status & CRCOK) && !(status & ErrMask))
553 return 0;
554
555 if (!(status & CRCOK))
556 stats->rx_crc_errors++;
557 else if (status & OVRUN)
558 stats->rx_over_errors++;
559 else if (status & (SHORT | LIMIT))
560 stats->rx_length_errors++;
561 else if (status & (MIIER | NIBON | COLON))
562 stats->rx_frame_errors++;
563
564 stats->rx_errors++;
565 return -1;
566 }
567
568 static int sis190_rx_interrupt(struct net_device *dev,
569 struct sis190_private *tp, void __iomem *ioaddr)
570 {
571 struct net_device_stats *stats = &dev->stats;
572 u32 rx_left, cur_rx = tp->cur_rx;
573 u32 delta, count;
574
575 rx_left = NUM_RX_DESC + tp->dirty_rx - cur_rx;
576 rx_left = sis190_rx_quota(rx_left, (u32) dev->quota);
577
578 for (; rx_left > 0; rx_left--, cur_rx++) {
579 unsigned int entry = cur_rx % NUM_RX_DESC;
580 struct RxDesc *desc = tp->RxDescRing + entry;
581 u32 status;
582
583 if (le32_to_cpu(desc->status) & OWNbit)
584 break;
585
586 status = le32_to_cpu(desc->PSize);
587
588 // net_intr(tp, KERN_INFO "%s: Rx PSize = %08x.\n", dev->name,
589 // status);
590
591 if (sis190_rx_pkt_err(status, stats) < 0)
592 sis190_give_to_asic(desc, tp->rx_buf_sz);
593 else {
594 struct sk_buff *skb = tp->Rx_skbuff[entry];
595 int pkt_size = (status & RxSizeMask) - 4;
596 void (*pci_action)(struct pci_dev *, dma_addr_t,
597 size_t, int) = pci_dma_sync_single_for_device;
598
599 if (unlikely(pkt_size > tp->rx_buf_sz)) {
600 net_intr(tp, KERN_INFO
601 "%s: (frag) status = %08x.\n",
602 dev->name, status);
603 stats->rx_dropped++;
604 stats->rx_length_errors++;
605 sis190_give_to_asic(desc, tp->rx_buf_sz);
606 continue;
607 }
608
609 pci_dma_sync_single_for_cpu(tp->pci_dev,
610 le32_to_cpu(desc->addr), tp->rx_buf_sz,
611 PCI_DMA_FROMDEVICE);
612
613 if (sis190_try_rx_copy(&skb, pkt_size, desc,
614 tp->rx_buf_sz)) {
615 pci_action = pci_unmap_single;
616 tp->Rx_skbuff[entry] = NULL;
617 sis190_make_unusable_by_asic(desc);
618 }
619
620 pci_action(tp->pci_dev, le32_to_cpu(desc->addr),
621 tp->rx_buf_sz, PCI_DMA_FROMDEVICE);
622
623 skb_put(skb, pkt_size);
624 skb->protocol = eth_type_trans(skb, dev);
625
626 sis190_rx_skb(skb);
627
628 dev->last_rx = jiffies;
629 stats->rx_packets++;
630 stats->rx_bytes += pkt_size;
631 if ((status & BCAST) == MCAST)
632 stats->multicast++;
633 }
634 }
635 count = cur_rx - tp->cur_rx;
636 tp->cur_rx = cur_rx;
637
638 delta = sis190_rx_fill(tp, dev, tp->dirty_rx, tp->cur_rx);
639 if (!delta && count && netif_msg_intr(tp))
640 printk(KERN_INFO "%s: no Rx buffer allocated.\n", dev->name);
641 tp->dirty_rx += delta;
642
643 if (((tp->dirty_rx + NUM_RX_DESC) == tp->cur_rx) && netif_msg_intr(tp))
644 printk(KERN_EMERG "%s: Rx buffers exhausted.\n", dev->name);
645
646 return count;
647 }
648
649 static void sis190_unmap_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
650 struct TxDesc *desc)
651 {
652 unsigned int len;
653
654 len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
655
656 pci_unmap_single(pdev, le32_to_cpu(desc->addr), len, PCI_DMA_TODEVICE);
657
658 memset(desc, 0x00, sizeof(*desc));
659 }
660
661 static void sis190_tx_interrupt(struct net_device *dev,
662 struct sis190_private *tp, void __iomem *ioaddr)
663 {
664 u32 pending, dirty_tx = tp->dirty_tx;
665 /*
666 * It would not be needed if queueing was allowed to be enabled
667 * again too early (hint: think preempt and unclocked smp systems).
668 */
669 unsigned int queue_stopped;
670
671 smp_rmb();
672 pending = tp->cur_tx - dirty_tx;
673 queue_stopped = (pending == NUM_TX_DESC);
674
675 for (; pending; pending--, dirty_tx++) {
676 unsigned int entry = dirty_tx % NUM_TX_DESC;
677 struct TxDesc *txd = tp->TxDescRing + entry;
678 struct sk_buff *skb;
679
680 if (le32_to_cpu(txd->status) & OWNbit)
681 break;
682
683 skb = tp->Tx_skbuff[entry];
684
685 dev->stats.tx_packets++;
686 dev->stats.tx_bytes += skb->len;
687
688 sis190_unmap_tx_skb(tp->pci_dev, skb, txd);
689 tp->Tx_skbuff[entry] = NULL;
690 dev_kfree_skb_irq(skb);
691 }
692
693 if (tp->dirty_tx != dirty_tx) {
694 tp->dirty_tx = dirty_tx;
695 smp_wmb();
696 if (queue_stopped)
697 netif_wake_queue(dev);
698 }
699 }
700
701 /*
702 * The interrupt handler does all of the Rx thread work and cleans up after
703 * the Tx thread.
704 */
705 static irqreturn_t sis190_interrupt(int irq, void *__dev)
706 {
707 struct net_device *dev = __dev;
708 struct sis190_private *tp = netdev_priv(dev);
709 void __iomem *ioaddr = tp->mmio_addr;
710 unsigned int handled = 0;
711 u32 status;
712
713 status = SIS_R32(IntrStatus);
714
715 if ((status == 0xffffffff) || !status)
716 goto out;
717
718 handled = 1;
719
720 if (unlikely(!netif_running(dev))) {
721 sis190_asic_down(ioaddr);
722 goto out;
723 }
724
725 SIS_W32(IntrStatus, status);
726
727 // net_intr(tp, KERN_INFO "%s: status = %08x.\n", dev->name, status);
728
729 if (status & LinkChange) {
730 net_intr(tp, KERN_INFO "%s: link change.\n", dev->name);
731 schedule_work(&tp->phy_task);
732 }
733
734 if (status & RxQInt)
735 sis190_rx_interrupt(dev, tp, ioaddr);
736
737 if (status & TxQ0Int)
738 sis190_tx_interrupt(dev, tp, ioaddr);
739 out:
740 return IRQ_RETVAL(handled);
741 }
742
743 #ifdef CONFIG_NET_POLL_CONTROLLER
744 static void sis190_netpoll(struct net_device *dev)
745 {
746 struct sis190_private *tp = netdev_priv(dev);
747 struct pci_dev *pdev = tp->pci_dev;
748
749 disable_irq(pdev->irq);
750 sis190_interrupt(pdev->irq, dev);
751 enable_irq(pdev->irq);
752 }
753 #endif
754
755 static void sis190_free_rx_skb(struct sis190_private *tp,
756 struct sk_buff **sk_buff, struct RxDesc *desc)
757 {
758 struct pci_dev *pdev = tp->pci_dev;
759
760 pci_unmap_single(pdev, le32_to_cpu(desc->addr), tp->rx_buf_sz,
761 PCI_DMA_FROMDEVICE);
762 dev_kfree_skb(*sk_buff);
763 *sk_buff = NULL;
764 sis190_make_unusable_by_asic(desc);
765 }
766
767 static void sis190_rx_clear(struct sis190_private *tp)
768 {
769 unsigned int i;
770
771 for (i = 0; i < NUM_RX_DESC; i++) {
772 if (!tp->Rx_skbuff[i])
773 continue;
774 sis190_free_rx_skb(tp, tp->Rx_skbuff + i, tp->RxDescRing + i);
775 }
776 }
777
778 static void sis190_init_ring_indexes(struct sis190_private *tp)
779 {
780 tp->dirty_tx = tp->dirty_rx = tp->cur_tx = tp->cur_rx = 0;
781 }
782
783 static int sis190_init_ring(struct net_device *dev)
784 {
785 struct sis190_private *tp = netdev_priv(dev);
786
787 sis190_init_ring_indexes(tp);
788
789 memset(tp->Tx_skbuff, 0x0, NUM_TX_DESC * sizeof(struct sk_buff *));
790 memset(tp->Rx_skbuff, 0x0, NUM_RX_DESC * sizeof(struct sk_buff *));
791
792 if (sis190_rx_fill(tp, dev, 0, NUM_RX_DESC) != NUM_RX_DESC)
793 goto err_rx_clear;
794
795 sis190_mark_as_last_descriptor(tp->RxDescRing + NUM_RX_DESC - 1);
796
797 return 0;
798
799 err_rx_clear:
800 sis190_rx_clear(tp);
801 return -ENOMEM;
802 }
803
804 static void sis190_set_rx_mode(struct net_device *dev)
805 {
806 struct sis190_private *tp = netdev_priv(dev);
807 void __iomem *ioaddr = tp->mmio_addr;
808 unsigned long flags;
809 u32 mc_filter[2]; /* Multicast hash filter */
810 u16 rx_mode;
811
812 if (dev->flags & IFF_PROMISC) {
813 rx_mode =
814 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
815 AcceptAllPhys;
816 mc_filter[1] = mc_filter[0] = 0xffffffff;
817 } else if ((dev->mc_count > multicast_filter_limit) ||
818 (dev->flags & IFF_ALLMULTI)) {
819 /* Too many to filter perfectly -- accept all multicasts. */
820 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
821 mc_filter[1] = mc_filter[0] = 0xffffffff;
822 } else {
823 struct dev_mc_list *mclist;
824 unsigned int i;
825
826 rx_mode = AcceptBroadcast | AcceptMyPhys;
827 mc_filter[1] = mc_filter[0] = 0;
828 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
829 i++, mclist = mclist->next) {
830 int bit_nr =
831 ether_crc(ETH_ALEN, mclist->dmi_addr) & 0x3f;
832 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
833 rx_mode |= AcceptMulticast;
834 }
835 }
836
837 spin_lock_irqsave(&tp->lock, flags);
838
839 SIS_W16(RxMacControl, rx_mode | 0x2);
840 SIS_W32(RxHashTable, mc_filter[0]);
841 SIS_W32(RxHashTable + 4, mc_filter[1]);
842
843 spin_unlock_irqrestore(&tp->lock, flags);
844 }
845
846 static void sis190_soft_reset(void __iomem *ioaddr)
847 {
848 SIS_W32(IntrControl, 0x8000);
849 SIS_PCI_COMMIT();
850 SIS_W32(IntrControl, 0x0);
851 sis190_asic_down(ioaddr);
852 }
853
854 static void sis190_hw_start(struct net_device *dev)
855 {
856 struct sis190_private *tp = netdev_priv(dev);
857 void __iomem *ioaddr = tp->mmio_addr;
858
859 sis190_soft_reset(ioaddr);
860
861 SIS_W32(TxDescStartAddr, tp->tx_dma);
862 SIS_W32(RxDescStartAddr, tp->rx_dma);
863
864 SIS_W32(IntrStatus, 0xffffffff);
865 SIS_W32(IntrMask, 0x0);
866 SIS_W32(GMIIControl, 0x0);
867 SIS_W32(TxMacControl, 0x60);
868 SIS_W16(RxMacControl, 0x02);
869 SIS_W32(RxHashTable, 0x0);
870 SIS_W32(0x6c, 0x0);
871 SIS_W32(RxWolCtrl, 0x0);
872 SIS_W32(RxWolData, 0x0);
873
874 SIS_PCI_COMMIT();
875
876 sis190_set_rx_mode(dev);
877
878 /* Enable all known interrupts by setting the interrupt mask. */
879 SIS_W32(IntrMask, sis190_intr_mask);
880
881 SIS_W32(TxControl, 0x1a00 | CmdTxEnb);
882 SIS_W32(RxControl, 0x1a1d);
883
884 netif_start_queue(dev);
885 }
886
887 static void sis190_phy_task(struct work_struct *work)
888 {
889 struct sis190_private *tp =
890 container_of(work, struct sis190_private, phy_task);
891 struct net_device *dev = tp->dev;
892 void __iomem *ioaddr = tp->mmio_addr;
893 int phy_id = tp->mii_if.phy_id;
894 u16 val;
895
896 rtnl_lock();
897
898 if (!netif_running(dev))
899 goto out_unlock;
900
901 val = mdio_read(ioaddr, phy_id, MII_BMCR);
902 if (val & BMCR_RESET) {
903 // FIXME: needlessly high ? -- FR 02/07/2005
904 mod_timer(&tp->timer, jiffies + HZ/10);
905 } else if (!(mdio_read_latched(ioaddr, phy_id, MII_BMSR) &
906 BMSR_ANEGCOMPLETE)) {
907 net_link(tp, KERN_WARNING "%s: PHY reset until link up.\n",
908 dev->name);
909 netif_carrier_off(dev);
910 mdio_write(ioaddr, phy_id, MII_BMCR, val | BMCR_RESET);
911 mod_timer(&tp->timer, jiffies + SIS190_PHY_TIMEOUT);
912 } else {
913 /* Rejoice ! */
914 struct {
915 int val;
916 u32 ctl;
917 const char *msg;
918 } reg31[] = {
919 { LPA_1000XFULL | LPA_SLCT, 0x07000c00 | 0x00001000,
920 "1000 Mbps Full Duplex" },
921 { LPA_1000XHALF | LPA_SLCT, 0x07000c00,
922 "1000 Mbps Half Duplex" },
923 { LPA_100FULL, 0x04000800 | 0x00001000,
924 "100 Mbps Full Duplex" },
925 { LPA_100HALF, 0x04000800,
926 "100 Mbps Half Duplex" },
927 { LPA_10FULL, 0x04000400 | 0x00001000,
928 "10 Mbps Full Duplex" },
929 { LPA_10HALF, 0x04000400,
930 "10 Mbps Half Duplex" },
931 { 0, 0x04000400, "unknown" }
932 }, *p;
933 u16 adv;
934
935 val = mdio_read(ioaddr, phy_id, 0x1f);
936 net_link(tp, KERN_INFO "%s: mii ext = %04x.\n", dev->name, val);
937
938 val = mdio_read(ioaddr, phy_id, MII_LPA);
939 adv = mdio_read(ioaddr, phy_id, MII_ADVERTISE);
940 net_link(tp, KERN_INFO "%s: mii lpa = %04x adv = %04x.\n",
941 dev->name, val, adv);
942
943 val &= adv;
944
945 for (p = reg31; p->val; p++) {
946 if ((val & p->val) == p->val)
947 break;
948 }
949
950 p->ctl |= SIS_R32(StationControl) & ~0x0f001c00;
951
952 if ((tp->features & F_HAS_RGMII) &&
953 (tp->features & F_PHY_BCM5461)) {
954 // Set Tx Delay in RGMII mode.
955 mdio_write(ioaddr, phy_id, 0x18, 0xf1c7);
956 udelay(200);
957 mdio_write(ioaddr, phy_id, 0x1c, 0x8c00);
958 p->ctl |= 0x03000000;
959 }
960
961 SIS_W32(StationControl, p->ctl);
962
963 if (tp->features & F_HAS_RGMII) {
964 SIS_W32(RGDelay, 0x0441);
965 SIS_W32(RGDelay, 0x0440);
966 }
967
968 net_link(tp, KERN_INFO "%s: link on %s mode.\n", dev->name,
969 p->msg);
970 netif_carrier_on(dev);
971 }
972
973 out_unlock:
974 rtnl_unlock();
975 }
976
977 static void sis190_phy_timer(unsigned long __opaque)
978 {
979 struct net_device *dev = (struct net_device *)__opaque;
980 struct sis190_private *tp = netdev_priv(dev);
981
982 if (likely(netif_running(dev)))
983 schedule_work(&tp->phy_task);
984 }
985
986 static inline void sis190_delete_timer(struct net_device *dev)
987 {
988 struct sis190_private *tp = netdev_priv(dev);
989
990 del_timer_sync(&tp->timer);
991 }
992
993 static inline void sis190_request_timer(struct net_device *dev)
994 {
995 struct sis190_private *tp = netdev_priv(dev);
996 struct timer_list *timer = &tp->timer;
997
998 init_timer(timer);
999 timer->expires = jiffies + SIS190_PHY_TIMEOUT;
1000 timer->data = (unsigned long)dev;
1001 timer->function = sis190_phy_timer;
1002 add_timer(timer);
1003 }
1004
1005 static void sis190_set_rxbufsize(struct sis190_private *tp,
1006 struct net_device *dev)
1007 {
1008 unsigned int mtu = dev->mtu;
1009
1010 tp->rx_buf_sz = (mtu > RX_BUF_SIZE) ? mtu + ETH_HLEN + 8 : RX_BUF_SIZE;
1011 /* RxDesc->size has a licence to kill the lower bits */
1012 if (tp->rx_buf_sz & 0x07) {
1013 tp->rx_buf_sz += 8;
1014 tp->rx_buf_sz &= RX_BUF_MASK;
1015 }
1016 }
1017
1018 static int sis190_open(struct net_device *dev)
1019 {
1020 struct sis190_private *tp = netdev_priv(dev);
1021 struct pci_dev *pdev = tp->pci_dev;
1022 int rc = -ENOMEM;
1023
1024 sis190_set_rxbufsize(tp, dev);
1025
1026 /*
1027 * Rx and Tx descriptors need 256 bytes alignment.
1028 * pci_alloc_consistent() guarantees a stronger alignment.
1029 */
1030 tp->TxDescRing = pci_alloc_consistent(pdev, TX_RING_BYTES, &tp->tx_dma);
1031 if (!tp->TxDescRing)
1032 goto out;
1033
1034 tp->RxDescRing = pci_alloc_consistent(pdev, RX_RING_BYTES, &tp->rx_dma);
1035 if (!tp->RxDescRing)
1036 goto err_free_tx_0;
1037
1038 rc = sis190_init_ring(dev);
1039 if (rc < 0)
1040 goto err_free_rx_1;
1041
1042 sis190_request_timer(dev);
1043
1044 rc = request_irq(dev->irq, sis190_interrupt, IRQF_SHARED, dev->name, dev);
1045 if (rc < 0)
1046 goto err_release_timer_2;
1047
1048 sis190_hw_start(dev);
1049 out:
1050 return rc;
1051
1052 err_release_timer_2:
1053 sis190_delete_timer(dev);
1054 sis190_rx_clear(tp);
1055 err_free_rx_1:
1056 pci_free_consistent(tp->pci_dev, RX_RING_BYTES, tp->RxDescRing,
1057 tp->rx_dma);
1058 err_free_tx_0:
1059 pci_free_consistent(tp->pci_dev, TX_RING_BYTES, tp->TxDescRing,
1060 tp->tx_dma);
1061 goto out;
1062 }
1063
1064 static void sis190_tx_clear(struct sis190_private *tp)
1065 {
1066 unsigned int i;
1067
1068 for (i = 0; i < NUM_TX_DESC; i++) {
1069 struct sk_buff *skb = tp->Tx_skbuff[i];
1070
1071 if (!skb)
1072 continue;
1073
1074 sis190_unmap_tx_skb(tp->pci_dev, skb, tp->TxDescRing + i);
1075 tp->Tx_skbuff[i] = NULL;
1076 dev_kfree_skb(skb);
1077
1078 tp->dev->stats.tx_dropped++;
1079 }
1080 tp->cur_tx = tp->dirty_tx = 0;
1081 }
1082
1083 static void sis190_down(struct net_device *dev)
1084 {
1085 struct sis190_private *tp = netdev_priv(dev);
1086 void __iomem *ioaddr = tp->mmio_addr;
1087 unsigned int poll_locked = 0;
1088
1089 sis190_delete_timer(dev);
1090
1091 netif_stop_queue(dev);
1092
1093 do {
1094 spin_lock_irq(&tp->lock);
1095
1096 sis190_asic_down(ioaddr);
1097
1098 spin_unlock_irq(&tp->lock);
1099
1100 synchronize_irq(dev->irq);
1101
1102 if (!poll_locked)
1103 poll_locked++;
1104
1105 synchronize_sched();
1106
1107 } while (SIS_R32(IntrMask));
1108
1109 sis190_tx_clear(tp);
1110 sis190_rx_clear(tp);
1111 }
1112
1113 static int sis190_close(struct net_device *dev)
1114 {
1115 struct sis190_private *tp = netdev_priv(dev);
1116 struct pci_dev *pdev = tp->pci_dev;
1117
1118 sis190_down(dev);
1119
1120 free_irq(dev->irq, dev);
1121
1122 pci_free_consistent(pdev, TX_RING_BYTES, tp->TxDescRing, tp->tx_dma);
1123 pci_free_consistent(pdev, RX_RING_BYTES, tp->RxDescRing, tp->rx_dma);
1124
1125 tp->TxDescRing = NULL;
1126 tp->RxDescRing = NULL;
1127
1128 return 0;
1129 }
1130
1131 static int sis190_start_xmit(struct sk_buff *skb, struct net_device *dev)
1132 {
1133 struct sis190_private *tp = netdev_priv(dev);
1134 void __iomem *ioaddr = tp->mmio_addr;
1135 u32 len, entry, dirty_tx;
1136 struct TxDesc *desc;
1137 dma_addr_t mapping;
1138
1139 if (unlikely(skb->len < ETH_ZLEN)) {
1140 if (skb_padto(skb, ETH_ZLEN)) {
1141 dev->stats.tx_dropped++;
1142 goto out;
1143 }
1144 len = ETH_ZLEN;
1145 } else {
1146 len = skb->len;
1147 }
1148
1149 entry = tp->cur_tx % NUM_TX_DESC;
1150 desc = tp->TxDescRing + entry;
1151
1152 if (unlikely(le32_to_cpu(desc->status) & OWNbit)) {
1153 netif_stop_queue(dev);
1154 net_tx_err(tp, KERN_ERR PFX
1155 "%s: BUG! Tx Ring full when queue awake!\n",
1156 dev->name);
1157 return NETDEV_TX_BUSY;
1158 }
1159
1160 mapping = pci_map_single(tp->pci_dev, skb->data, len, PCI_DMA_TODEVICE);
1161
1162 tp->Tx_skbuff[entry] = skb;
1163
1164 desc->PSize = cpu_to_le32(len);
1165 desc->addr = cpu_to_le32(mapping);
1166
1167 desc->size = cpu_to_le32(len);
1168 if (entry == (NUM_TX_DESC - 1))
1169 desc->size |= cpu_to_le32(RingEnd);
1170
1171 wmb();
1172
1173 desc->status = cpu_to_le32(OWNbit | INTbit | DEFbit | CRCbit | PADbit);
1174
1175 tp->cur_tx++;
1176
1177 smp_wmb();
1178
1179 SIS_W32(TxControl, 0x1a00 | CmdReset | CmdTxEnb);
1180
1181 dev->trans_start = jiffies;
1182
1183 dirty_tx = tp->dirty_tx;
1184 if ((tp->cur_tx - NUM_TX_DESC) == dirty_tx) {
1185 netif_stop_queue(dev);
1186 smp_rmb();
1187 if (dirty_tx != tp->dirty_tx)
1188 netif_wake_queue(dev);
1189 }
1190 out:
1191 return NETDEV_TX_OK;
1192 }
1193
1194 static void sis190_free_phy(struct list_head *first_phy)
1195 {
1196 struct sis190_phy *cur, *next;
1197
1198 list_for_each_entry_safe(cur, next, first_phy, list) {
1199 kfree(cur);
1200 }
1201 }
1202
1203 /**
1204 * sis190_default_phy - Select default PHY for sis190 mac.
1205 * @dev: the net device to probe for
1206 *
1207 * Select first detected PHY with link as default.
1208 * If no one is link on, select PHY whose types is HOME as default.
1209 * If HOME doesn't exist, select LAN.
1210 */
1211 static u16 sis190_default_phy(struct net_device *dev)
1212 {
1213 struct sis190_phy *phy, *phy_home, *phy_default, *phy_lan;
1214 struct sis190_private *tp = netdev_priv(dev);
1215 struct mii_if_info *mii_if = &tp->mii_if;
1216 void __iomem *ioaddr = tp->mmio_addr;
1217 u16 status;
1218
1219 phy_home = phy_default = phy_lan = NULL;
1220
1221 list_for_each_entry(phy, &tp->first_phy, list) {
1222 status = mdio_read_latched(ioaddr, phy->phy_id, MII_BMSR);
1223
1224 // Link ON & Not select default PHY & not ghost PHY.
1225 if ((status & BMSR_LSTATUS) &&
1226 !phy_default &&
1227 (phy->type != UNKNOWN)) {
1228 phy_default = phy;
1229 } else {
1230 status = mdio_read(ioaddr, phy->phy_id, MII_BMCR);
1231 mdio_write(ioaddr, phy->phy_id, MII_BMCR,
1232 status | BMCR_ANENABLE | BMCR_ISOLATE);
1233 if (phy->type == HOME)
1234 phy_home = phy;
1235 else if (phy->type == LAN)
1236 phy_lan = phy;
1237 }
1238 }
1239
1240 if (!phy_default) {
1241 if (phy_home)
1242 phy_default = phy_home;
1243 else if (phy_lan)
1244 phy_default = phy_lan;
1245 else
1246 phy_default = list_entry(&tp->first_phy,
1247 struct sis190_phy, list);
1248 }
1249
1250 if (mii_if->phy_id != phy_default->phy_id) {
1251 mii_if->phy_id = phy_default->phy_id;
1252 net_probe(tp, KERN_INFO
1253 "%s: Using transceiver at address %d as default.\n",
1254 pci_name(tp->pci_dev), mii_if->phy_id);
1255 }
1256
1257 status = mdio_read(ioaddr, mii_if->phy_id, MII_BMCR);
1258 status &= (~BMCR_ISOLATE);
1259
1260 mdio_write(ioaddr, mii_if->phy_id, MII_BMCR, status);
1261 status = mdio_read_latched(ioaddr, mii_if->phy_id, MII_BMSR);
1262
1263 return status;
1264 }
1265
1266 static void sis190_init_phy(struct net_device *dev, struct sis190_private *tp,
1267 struct sis190_phy *phy, unsigned int phy_id,
1268 u16 mii_status)
1269 {
1270 void __iomem *ioaddr = tp->mmio_addr;
1271 struct mii_chip_info *p;
1272
1273 INIT_LIST_HEAD(&phy->list);
1274 phy->status = mii_status;
1275 phy->phy_id = phy_id;
1276
1277 phy->id[0] = mdio_read(ioaddr, phy_id, MII_PHYSID1);
1278 phy->id[1] = mdio_read(ioaddr, phy_id, MII_PHYSID2);
1279
1280 for (p = mii_chip_table; p->type; p++) {
1281 if ((p->id[0] == phy->id[0]) &&
1282 (p->id[1] == (phy->id[1] & 0xfff0))) {
1283 break;
1284 }
1285 }
1286
1287 if (p->id[1]) {
1288 phy->type = (p->type == MIX) ?
1289 ((mii_status & (BMSR_100FULL | BMSR_100HALF)) ?
1290 LAN : HOME) : p->type;
1291 tp->features |= p->feature;
1292 } else
1293 phy->type = UNKNOWN;
1294
1295 net_probe(tp, KERN_INFO "%s: %s transceiver at address %d.\n",
1296 pci_name(tp->pci_dev),
1297 (phy->type == UNKNOWN) ? "Unknown PHY" : p->name, phy_id);
1298 }
1299
1300 static void sis190_mii_probe_88e1111_fixup(struct sis190_private *tp)
1301 {
1302 if (tp->features & F_PHY_88E1111) {
1303 void __iomem *ioaddr = tp->mmio_addr;
1304 int phy_id = tp->mii_if.phy_id;
1305 u16 reg[2][2] = {
1306 { 0x808b, 0x0ce1 },
1307 { 0x808f, 0x0c60 }
1308 }, *p;
1309
1310 p = (tp->features & F_HAS_RGMII) ? reg[0] : reg[1];
1311
1312 mdio_write(ioaddr, phy_id, 0x1b, p[0]);
1313 udelay(200);
1314 mdio_write(ioaddr, phy_id, 0x14, p[1]);
1315 udelay(200);
1316 }
1317 }
1318
1319 /**
1320 * sis190_mii_probe - Probe MII PHY for sis190
1321 * @dev: the net device to probe for
1322 *
1323 * Search for total of 32 possible mii phy addresses.
1324 * Identify and set current phy if found one,
1325 * return error if it failed to found.
1326 */
1327 static int __devinit sis190_mii_probe(struct net_device *dev)
1328 {
1329 struct sis190_private *tp = netdev_priv(dev);
1330 struct mii_if_info *mii_if = &tp->mii_if;
1331 void __iomem *ioaddr = tp->mmio_addr;
1332 int phy_id;
1333 int rc = 0;
1334
1335 INIT_LIST_HEAD(&tp->first_phy);
1336
1337 for (phy_id = 0; phy_id < PHY_MAX_ADDR; phy_id++) {
1338 struct sis190_phy *phy;
1339 u16 status;
1340
1341 status = mdio_read_latched(ioaddr, phy_id, MII_BMSR);
1342
1343 // Try next mii if the current one is not accessible.
1344 if (status == 0xffff || status == 0x0000)
1345 continue;
1346
1347 phy = kmalloc(sizeof(*phy), GFP_KERNEL);
1348 if (!phy) {
1349 sis190_free_phy(&tp->first_phy);
1350 rc = -ENOMEM;
1351 goto out;
1352 }
1353
1354 sis190_init_phy(dev, tp, phy, phy_id, status);
1355
1356 list_add(&tp->first_phy, &phy->list);
1357 }
1358
1359 if (list_empty(&tp->first_phy)) {
1360 net_probe(tp, KERN_INFO "%s: No MII transceivers found!\n",
1361 pci_name(tp->pci_dev));
1362 rc = -EIO;
1363 goto out;
1364 }
1365
1366 /* Select default PHY for mac */
1367 sis190_default_phy(dev);
1368
1369 sis190_mii_probe_88e1111_fixup(tp);
1370
1371 mii_if->dev = dev;
1372 mii_if->mdio_read = __mdio_read;
1373 mii_if->mdio_write = __mdio_write;
1374 mii_if->phy_id_mask = PHY_ID_ANY;
1375 mii_if->reg_num_mask = MII_REG_ANY;
1376 out:
1377 return rc;
1378 }
1379
1380 static void sis190_mii_remove(struct net_device *dev)
1381 {
1382 struct sis190_private *tp = netdev_priv(dev);
1383
1384 sis190_free_phy(&tp->first_phy);
1385 }
1386
1387 static void sis190_release_board(struct pci_dev *pdev)
1388 {
1389 struct net_device *dev = pci_get_drvdata(pdev);
1390 struct sis190_private *tp = netdev_priv(dev);
1391
1392 iounmap(tp->mmio_addr);
1393 pci_release_regions(pdev);
1394 pci_disable_device(pdev);
1395 free_netdev(dev);
1396 }
1397
1398 static struct net_device * __devinit sis190_init_board(struct pci_dev *pdev)
1399 {
1400 struct sis190_private *tp;
1401 struct net_device *dev;
1402 void __iomem *ioaddr;
1403 int rc;
1404
1405 dev = alloc_etherdev(sizeof(*tp));
1406 if (!dev) {
1407 net_drv(&debug, KERN_ERR PFX "unable to alloc new ethernet\n");
1408 rc = -ENOMEM;
1409 goto err_out_0;
1410 }
1411
1412 SET_NETDEV_DEV(dev, &pdev->dev);
1413
1414 tp = netdev_priv(dev);
1415 tp->dev = dev;
1416 tp->msg_enable = netif_msg_init(debug.msg_enable, SIS190_MSG_DEFAULT);
1417
1418 rc = pci_enable_device(pdev);
1419 if (rc < 0) {
1420 net_probe(tp, KERN_ERR "%s: enable failure\n", pci_name(pdev));
1421 goto err_free_dev_1;
1422 }
1423
1424 rc = -ENODEV;
1425
1426 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
1427 net_probe(tp, KERN_ERR "%s: region #0 is no MMIO resource.\n",
1428 pci_name(pdev));
1429 goto err_pci_disable_2;
1430 }
1431 if (pci_resource_len(pdev, 0) < SIS190_REGS_SIZE) {
1432 net_probe(tp, KERN_ERR "%s: invalid PCI region size(s).\n",
1433 pci_name(pdev));
1434 goto err_pci_disable_2;
1435 }
1436
1437 rc = pci_request_regions(pdev, DRV_NAME);
1438 if (rc < 0) {
1439 net_probe(tp, KERN_ERR PFX "%s: could not request regions.\n",
1440 pci_name(pdev));
1441 goto err_pci_disable_2;
1442 }
1443
1444 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1445 if (rc < 0) {
1446 net_probe(tp, KERN_ERR "%s: DMA configuration failed.\n",
1447 pci_name(pdev));
1448 goto err_free_res_3;
1449 }
1450
1451 pci_set_master(pdev);
1452
1453 ioaddr = ioremap(pci_resource_start(pdev, 0), SIS190_REGS_SIZE);
1454 if (!ioaddr) {
1455 net_probe(tp, KERN_ERR "%s: cannot remap MMIO, aborting\n",
1456 pci_name(pdev));
1457 rc = -EIO;
1458 goto err_free_res_3;
1459 }
1460
1461 tp->pci_dev = pdev;
1462 tp->mmio_addr = ioaddr;
1463
1464 sis190_irq_mask_and_ack(ioaddr);
1465
1466 sis190_soft_reset(ioaddr);
1467 out:
1468 return dev;
1469
1470 err_free_res_3:
1471 pci_release_regions(pdev);
1472 err_pci_disable_2:
1473 pci_disable_device(pdev);
1474 err_free_dev_1:
1475 free_netdev(dev);
1476 err_out_0:
1477 dev = ERR_PTR(rc);
1478 goto out;
1479 }
1480
1481 static void sis190_tx_timeout(struct net_device *dev)
1482 {
1483 struct sis190_private *tp = netdev_priv(dev);
1484 void __iomem *ioaddr = tp->mmio_addr;
1485 u8 tmp8;
1486
1487 /* Disable Tx, if not already */
1488 tmp8 = SIS_R8(TxControl);
1489 if (tmp8 & CmdTxEnb)
1490 SIS_W8(TxControl, tmp8 & ~CmdTxEnb);
1491
1492
1493 net_tx_err(tp, KERN_INFO "%s: Transmit timeout, status %08x %08x.\n",
1494 dev->name, SIS_R32(TxControl), SIS_R32(TxSts));
1495
1496 /* Disable interrupts by clearing the interrupt mask. */
1497 SIS_W32(IntrMask, 0x0000);
1498
1499 /* Stop a shared interrupt from scavenging while we are. */
1500 spin_lock_irq(&tp->lock);
1501 sis190_tx_clear(tp);
1502 spin_unlock_irq(&tp->lock);
1503
1504 /* ...and finally, reset everything. */
1505 sis190_hw_start(dev);
1506
1507 netif_wake_queue(dev);
1508 }
1509
1510 static void sis190_set_rgmii(struct sis190_private *tp, u8 reg)
1511 {
1512 tp->features |= (reg & 0x80) ? F_HAS_RGMII : 0;
1513 }
1514
1515 static int __devinit sis190_get_mac_addr_from_eeprom(struct pci_dev *pdev,
1516 struct net_device *dev)
1517 {
1518 struct sis190_private *tp = netdev_priv(dev);
1519 void __iomem *ioaddr = tp->mmio_addr;
1520 u16 sig;
1521 int i;
1522
1523 net_probe(tp, KERN_INFO "%s: Read MAC address from EEPROM\n",
1524 pci_name(pdev));
1525
1526 /* Check to see if there is a sane EEPROM */
1527 sig = (u16) sis190_read_eeprom(ioaddr, EEPROMSignature);
1528
1529 if ((sig == 0xffff) || (sig == 0x0000)) {
1530 net_probe(tp, KERN_INFO "%s: Error EEPROM read %x.\n",
1531 pci_name(pdev), sig);
1532 return -EIO;
1533 }
1534
1535 /* Get MAC address from EEPROM */
1536 for (i = 0; i < MAC_ADDR_LEN / 2; i++) {
1537 u16 w = sis190_read_eeprom(ioaddr, EEPROMMACAddr + i);
1538
1539 ((__le16 *)dev->dev_addr)[i] = cpu_to_le16(w);
1540 }
1541
1542 sis190_set_rgmii(tp, sis190_read_eeprom(ioaddr, EEPROMInfo));
1543
1544 return 0;
1545 }
1546
1547 /**
1548 * sis190_get_mac_addr_from_apc - Get MAC address for SiS96x model
1549 * @pdev: PCI device
1550 * @dev: network device to get address for
1551 *
1552 * SiS96x model, use APC CMOS RAM to store MAC address.
1553 * APC CMOS RAM is accessed through ISA bridge.
1554 * MAC address is read into @net_dev->dev_addr.
1555 */
1556 static int __devinit sis190_get_mac_addr_from_apc(struct pci_dev *pdev,
1557 struct net_device *dev)
1558 {
1559 static const u16 __devinitdata ids[] = { 0x0965, 0x0966, 0x0968 };
1560 struct sis190_private *tp = netdev_priv(dev);
1561 struct pci_dev *isa_bridge;
1562 u8 reg, tmp8;
1563 unsigned int i;
1564
1565 net_probe(tp, KERN_INFO "%s: Read MAC address from APC.\n",
1566 pci_name(pdev));
1567
1568 for (i = 0; i < ARRAY_SIZE(ids); i++) {
1569 isa_bridge = pci_get_device(PCI_VENDOR_ID_SI, ids[i], NULL);
1570 if (isa_bridge)
1571 break;
1572 }
1573
1574 if (!isa_bridge) {
1575 net_probe(tp, KERN_INFO "%s: Can not find ISA bridge.\n",
1576 pci_name(pdev));
1577 return -EIO;
1578 }
1579
1580 /* Enable port 78h & 79h to access APC Registers. */
1581 pci_read_config_byte(isa_bridge, 0x48, &tmp8);
1582 reg = (tmp8 & ~0x02);
1583 pci_write_config_byte(isa_bridge, 0x48, reg);
1584 udelay(50);
1585 pci_read_config_byte(isa_bridge, 0x48, &reg);
1586
1587 for (i = 0; i < MAC_ADDR_LEN; i++) {
1588 outb(0x9 + i, 0x78);
1589 dev->dev_addr[i] = inb(0x79);
1590 }
1591
1592 outb(0x12, 0x78);
1593 reg = inb(0x79);
1594
1595 sis190_set_rgmii(tp, reg);
1596
1597 /* Restore the value to ISA Bridge */
1598 pci_write_config_byte(isa_bridge, 0x48, tmp8);
1599 pci_dev_put(isa_bridge);
1600
1601 return 0;
1602 }
1603
1604 /**
1605 * sis190_init_rxfilter - Initialize the Rx filter
1606 * @dev: network device to initialize
1607 *
1608 * Set receive filter address to our MAC address
1609 * and enable packet filtering.
1610 */
1611 static inline void sis190_init_rxfilter(struct net_device *dev)
1612 {
1613 struct sis190_private *tp = netdev_priv(dev);
1614 void __iomem *ioaddr = tp->mmio_addr;
1615 u16 ctl;
1616 int i;
1617
1618 ctl = SIS_R16(RxMacControl);
1619 /*
1620 * Disable packet filtering before setting filter.
1621 * Note: SiS's driver writes 32 bits but RxMacControl is 16 bits
1622 * only and followed by RxMacAddr (6 bytes). Strange. -- FR
1623 */
1624 SIS_W16(RxMacControl, ctl & ~0x0f00);
1625
1626 for (i = 0; i < MAC_ADDR_LEN; i++)
1627 SIS_W8(RxMacAddr + i, dev->dev_addr[i]);
1628
1629 SIS_W16(RxMacControl, ctl);
1630 SIS_PCI_COMMIT();
1631 }
1632
1633 static int sis190_get_mac_addr(struct pci_dev *pdev, struct net_device *dev)
1634 {
1635 u8 from;
1636
1637 pci_read_config_byte(pdev, 0x73, &from);
1638
1639 return (from & 0x00000001) ?
1640 sis190_get_mac_addr_from_apc(pdev, dev) :
1641 sis190_get_mac_addr_from_eeprom(pdev, dev);
1642 }
1643
1644 static void sis190_set_speed_auto(struct net_device *dev)
1645 {
1646 struct sis190_private *tp = netdev_priv(dev);
1647 void __iomem *ioaddr = tp->mmio_addr;
1648 int phy_id = tp->mii_if.phy_id;
1649 int val;
1650
1651 net_link(tp, KERN_INFO "%s: Enabling Auto-negotiation.\n", dev->name);
1652
1653 val = mdio_read(ioaddr, phy_id, MII_ADVERTISE);
1654
1655 // Enable 10/100 Full/Half Mode, leave MII_ADVERTISE bit4:0
1656 // unchanged.
1657 mdio_write(ioaddr, phy_id, MII_ADVERTISE, (val & ADVERTISE_SLCT) |
1658 ADVERTISE_100FULL | ADVERTISE_10FULL |
1659 ADVERTISE_100HALF | ADVERTISE_10HALF);
1660
1661 // Enable 1000 Full Mode.
1662 mdio_write(ioaddr, phy_id, MII_CTRL1000, ADVERTISE_1000FULL);
1663
1664 // Enable auto-negotiation and restart auto-negotiation.
1665 mdio_write(ioaddr, phy_id, MII_BMCR,
1666 BMCR_ANENABLE | BMCR_ANRESTART | BMCR_RESET);
1667 }
1668
1669 static int sis190_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1670 {
1671 struct sis190_private *tp = netdev_priv(dev);
1672
1673 return mii_ethtool_gset(&tp->mii_if, cmd);
1674 }
1675
1676 static int sis190_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1677 {
1678 struct sis190_private *tp = netdev_priv(dev);
1679
1680 return mii_ethtool_sset(&tp->mii_if, cmd);
1681 }
1682
1683 static void sis190_get_drvinfo(struct net_device *dev,
1684 struct ethtool_drvinfo *info)
1685 {
1686 struct sis190_private *tp = netdev_priv(dev);
1687
1688 strcpy(info->driver, DRV_NAME);
1689 strcpy(info->version, DRV_VERSION);
1690 strcpy(info->bus_info, pci_name(tp->pci_dev));
1691 }
1692
1693 static int sis190_get_regs_len(struct net_device *dev)
1694 {
1695 return SIS190_REGS_SIZE;
1696 }
1697
1698 static void sis190_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1699 void *p)
1700 {
1701 struct sis190_private *tp = netdev_priv(dev);
1702 unsigned long flags;
1703
1704 if (regs->len > SIS190_REGS_SIZE)
1705 regs->len = SIS190_REGS_SIZE;
1706
1707 spin_lock_irqsave(&tp->lock, flags);
1708 memcpy_fromio(p, tp->mmio_addr, regs->len);
1709 spin_unlock_irqrestore(&tp->lock, flags);
1710 }
1711
1712 static int sis190_nway_reset(struct net_device *dev)
1713 {
1714 struct sis190_private *tp = netdev_priv(dev);
1715
1716 return mii_nway_restart(&tp->mii_if);
1717 }
1718
1719 static u32 sis190_get_msglevel(struct net_device *dev)
1720 {
1721 struct sis190_private *tp = netdev_priv(dev);
1722
1723 return tp->msg_enable;
1724 }
1725
1726 static void sis190_set_msglevel(struct net_device *dev, u32 value)
1727 {
1728 struct sis190_private *tp = netdev_priv(dev);
1729
1730 tp->msg_enable = value;
1731 }
1732
1733 static const struct ethtool_ops sis190_ethtool_ops = {
1734 .get_settings = sis190_get_settings,
1735 .set_settings = sis190_set_settings,
1736 .get_drvinfo = sis190_get_drvinfo,
1737 .get_regs_len = sis190_get_regs_len,
1738 .get_regs = sis190_get_regs,
1739 .get_link = ethtool_op_get_link,
1740 .get_msglevel = sis190_get_msglevel,
1741 .set_msglevel = sis190_set_msglevel,
1742 .nway_reset = sis190_nway_reset,
1743 };
1744
1745 static int sis190_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1746 {
1747 struct sis190_private *tp = netdev_priv(dev);
1748
1749 return !netif_running(dev) ? -EINVAL :
1750 generic_mii_ioctl(&tp->mii_if, if_mii(ifr), cmd, NULL);
1751 }
1752
1753 static int __devinit sis190_init_one(struct pci_dev *pdev,
1754 const struct pci_device_id *ent)
1755 {
1756 static int printed_version = 0;
1757 struct sis190_private *tp;
1758 struct net_device *dev;
1759 void __iomem *ioaddr;
1760 int rc;
1761 DECLARE_MAC_BUF(mac);
1762
1763 if (!printed_version) {
1764 net_drv(&debug, KERN_INFO SIS190_DRIVER_NAME " loaded.\n");
1765 printed_version = 1;
1766 }
1767
1768 dev = sis190_init_board(pdev);
1769 if (IS_ERR(dev)) {
1770 rc = PTR_ERR(dev);
1771 goto out;
1772 }
1773
1774 pci_set_drvdata(pdev, dev);
1775
1776 tp = netdev_priv(dev);
1777 ioaddr = tp->mmio_addr;
1778
1779 rc = sis190_get_mac_addr(pdev, dev);
1780 if (rc < 0)
1781 goto err_release_board;
1782
1783 sis190_init_rxfilter(dev);
1784
1785 INIT_WORK(&tp->phy_task, sis190_phy_task);
1786
1787 dev->open = sis190_open;
1788 dev->stop = sis190_close;
1789 dev->do_ioctl = sis190_ioctl;
1790 dev->tx_timeout = sis190_tx_timeout;
1791 dev->watchdog_timeo = SIS190_TX_TIMEOUT;
1792 dev->hard_start_xmit = sis190_start_xmit;
1793 #ifdef CONFIG_NET_POLL_CONTROLLER
1794 dev->poll_controller = sis190_netpoll;
1795 #endif
1796 dev->set_multicast_list = sis190_set_rx_mode;
1797 SET_ETHTOOL_OPS(dev, &sis190_ethtool_ops);
1798 dev->irq = pdev->irq;
1799 dev->base_addr = (unsigned long) 0xdead;
1800
1801 spin_lock_init(&tp->lock);
1802
1803 rc = sis190_mii_probe(dev);
1804 if (rc < 0)
1805 goto err_release_board;
1806
1807 rc = register_netdev(dev);
1808 if (rc < 0)
1809 goto err_remove_mii;
1810
1811 net_probe(tp, KERN_INFO "%s: %s at %p (IRQ: %d), "
1812 "%s\n",
1813 pci_name(pdev), sis_chip_info[ent->driver_data].name,
1814 ioaddr, dev->irq, print_mac(mac, dev->dev_addr));
1815
1816 net_probe(tp, KERN_INFO "%s: %s mode.\n", dev->name,
1817 (tp->features & F_HAS_RGMII) ? "RGMII" : "GMII");
1818
1819 netif_carrier_off(dev);
1820
1821 sis190_set_speed_auto(dev);
1822 out:
1823 return rc;
1824
1825 err_remove_mii:
1826 sis190_mii_remove(dev);
1827 err_release_board:
1828 sis190_release_board(pdev);
1829 goto out;
1830 }
1831
1832 static void __devexit sis190_remove_one(struct pci_dev *pdev)
1833 {
1834 struct net_device *dev = pci_get_drvdata(pdev);
1835
1836 sis190_mii_remove(dev);
1837 flush_scheduled_work();
1838 unregister_netdev(dev);
1839 sis190_release_board(pdev);
1840 pci_set_drvdata(pdev, NULL);
1841 }
1842
1843 static struct pci_driver sis190_pci_driver = {
1844 .name = DRV_NAME,
1845 .id_table = sis190_pci_tbl,
1846 .probe = sis190_init_one,
1847 .remove = __devexit_p(sis190_remove_one),
1848 };
1849
1850 static int __init sis190_init_module(void)
1851 {
1852 return pci_register_driver(&sis190_pci_driver);
1853 }
1854
1855 static void __exit sis190_cleanup_module(void)
1856 {
1857 pci_unregister_driver(&sis190_pci_driver);
1858 }
1859
1860 module_init(sis190_init_module);
1861 module_exit(sis190_cleanup_module);
WRT350N Kernel Patches