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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / net / ethernet / silan / sc92031.c
bloba284d6440538309cc801a9d87685af2037cc7c5b
1 /* Silan SC92031 PCI Fast Ethernet Adapter driver
2 *
3 * Based on vendor drivers:
4 * Silan Fast Ethernet Netcard Driver:
5 * MODULE_AUTHOR ("gaoyonghong");
6 * MODULE_DESCRIPTION ("SILAN Fast Ethernet driver");
7 * MODULE_LICENSE("GPL");
8 * 8139D Fast Ethernet driver:
9 * (C) 2002 by gaoyonghong
10 * MODULE_AUTHOR ("gaoyonghong");
11 * MODULE_DESCRIPTION ("Rsltek 8139D PCI Fast Ethernet Adapter driver");
12 * MODULE_LICENSE("GPL");
13 * Both are almost identical and seem to be based on pci-skeleton.c
14 *
15 * Rewritten for 2.6 by Cesar Eduardo Barros
16 *
17 * A datasheet for this chip can be found at
18 * http://www.silan.com.cn/english/product/pdf/SC92031AY.pdf
19 */
20
21 /* Note about set_mac_address: I don't know how to change the hardware
22 * matching, so you need to enable IFF_PROMISC when using it.
23 */
24
25 #include <linux/interrupt.h>
26 #include <linux/module.h>
27 #include <linux/kernel.h>
28 #include <linux/delay.h>
29 #include <linux/pci.h>
30 #include <linux/dma-mapping.h>
31 #include <linux/netdevice.h>
32 #include <linux/etherdevice.h>
33 #include <linux/ethtool.h>
34 #include <linux/mii.h>
35 #include <linux/crc32.h>
36
37 #include <asm/irq.h>
38
39 #define SC92031_NAME "sc92031"
40
41 /* BAR 0 is MMIO, BAR 1 is PIO */
42 #ifndef SC92031_USE_BAR
43 #define SC92031_USE_BAR 0
44 #endif
45
46 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast). */
47 static int multicast_filter_limit = 64;
48 module_param(multicast_filter_limit, int, 0);
49 MODULE_PARM_DESC(multicast_filter_limit,
50 "Maximum number of filtered multicast addresses");
51
52 static int media;
53 module_param(media, int, 0);
54 MODULE_PARM_DESC(media, "Media type (0x00 = autodetect,"
55 " 0x01 = 10M half, 0x02 = 10M full,"
56 " 0x04 = 100M half, 0x08 = 100M full)");
57
58 /* Size of the in-memory receive ring. */
59 #define RX_BUF_LEN_IDX 3 /* 0==8K, 1==16K, 2==32K, 3==64K ,4==128K*/
60 #define RX_BUF_LEN (8192 << RX_BUF_LEN_IDX)
61
62 /* Number of Tx descriptor registers. */
63 #define NUM_TX_DESC 4
64
65 /* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/
66 #define MAX_ETH_FRAME_SIZE 1536
67
68 /* Size of the Tx bounce buffers -- must be at least (dev->mtu+14+4). */
69 #define TX_BUF_SIZE MAX_ETH_FRAME_SIZE
70 #define TX_BUF_TOT_LEN (TX_BUF_SIZE * NUM_TX_DESC)
71
72 /* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
73 #define RX_FIFO_THRESH 7 /* Rx buffer level before first PCI xfer. */
74
75 /* Time in jiffies before concluding the transmitter is hung. */
76 #define TX_TIMEOUT (4*HZ)
77
78 #define SILAN_STATS_NUM 2 /* number of ETHTOOL_GSTATS */
79
80 /* media options */
81 #define AUTOSELECT 0x00
82 #define M10_HALF 0x01
83 #define M10_FULL 0x02
84 #define M100_HALF 0x04
85 #define M100_FULL 0x08
86
87 /* Symbolic offsets to registers. */
88 enum silan_registers {
89 Config0 = 0x00, // Config0
90 Config1 = 0x04, // Config1
91 RxBufWPtr = 0x08, // Rx buffer writer poiter
92 IntrStatus = 0x0C, // Interrupt status
93 IntrMask = 0x10, // Interrupt mask
94 RxbufAddr = 0x14, // Rx buffer start address
95 RxBufRPtr = 0x18, // Rx buffer read pointer
96 Txstatusall = 0x1C, // Transmit status of all descriptors
97 TxStatus0 = 0x20, // Transmit status (Four 32bit registers).
98 TxAddr0 = 0x30, // Tx descriptors (also four 32bit).
99 RxConfig = 0x40, // Rx configuration
100 MAC0 = 0x44, // Ethernet hardware address.
101 MAR0 = 0x4C, // Multicast filter.
102 RxStatus0 = 0x54, // Rx status
103 TxConfig = 0x5C, // Tx configuration
104 PhyCtrl = 0x60, // physical control
105 FlowCtrlConfig = 0x64, // flow control
106 Miicmd0 = 0x68, // Mii command0 register
107 Miicmd1 = 0x6C, // Mii command1 register
108 Miistatus = 0x70, // Mii status register
109 Timercnt = 0x74, // Timer counter register
110 TimerIntr = 0x78, // Timer interrupt register
111 PMConfig = 0x7C, // Power Manager configuration
112 CRC0 = 0x80, // Power Manager CRC ( Two 32bit regisers)
113 Wakeup0 = 0x88, // power Manager wakeup( Eight 64bit regiser)
114 LSBCRC0 = 0xC8, // power Manager LSBCRC(Two 32bit regiser)
115 TestD0 = 0xD0,
116 TestD4 = 0xD4,
117 TestD8 = 0xD8,
118 };
119
120 #define MII_JAB 16
121 #define MII_OutputStatus 24
122
123 #define PHY_16_JAB_ENB 0x1000
124 #define PHY_16_PORT_ENB 0x1
125
126 enum IntrStatusBits {
127 LinkFail = 0x80000000,
128 LinkOK = 0x40000000,
129 TimeOut = 0x20000000,
130 RxOverflow = 0x0040,
131 RxOK = 0x0020,
132 TxOK = 0x0001,
133 IntrBits = LinkFail|LinkOK|TimeOut|RxOverflow|RxOK|TxOK,
134 };
135
136 enum TxStatusBits {
137 TxCarrierLost = 0x20000000,
138 TxAborted = 0x10000000,
139 TxOutOfWindow = 0x08000000,
140 TxNccShift = 22,
141 EarlyTxThresShift = 16,
142 TxStatOK = 0x8000,
143 TxUnderrun = 0x4000,
144 TxOwn = 0x2000,
145 };
146
147 enum RxStatusBits {
148 RxStatesOK = 0x80000,
149 RxBadAlign = 0x40000,
150 RxHugeFrame = 0x20000,
151 RxSmallFrame = 0x10000,
152 RxCRCOK = 0x8000,
153 RxCrlFrame = 0x4000,
154 Rx_Broadcast = 0x2000,
155 Rx_Multicast = 0x1000,
156 RxAddrMatch = 0x0800,
157 MiiErr = 0x0400,
158 };
159
160 enum RxConfigBits {
161 RxFullDx = 0x80000000,
162 RxEnb = 0x40000000,
163 RxSmall = 0x20000000,
164 RxHuge = 0x10000000,
165 RxErr = 0x08000000,
166 RxAllphys = 0x04000000,
167 RxMulticast = 0x02000000,
168 RxBroadcast = 0x01000000,
169 RxLoopBack = (1 << 23) | (1 << 22),
170 LowThresholdShift = 12,
171 HighThresholdShift = 2,
172 };
173
174 enum TxConfigBits {
175 TxFullDx = 0x80000000,
176 TxEnb = 0x40000000,
177 TxEnbPad = 0x20000000,
178 TxEnbHuge = 0x10000000,
179 TxEnbFCS = 0x08000000,
180 TxNoBackOff = 0x04000000,
181 TxEnbPrem = 0x02000000,
182 TxCareLostCrs = 0x1000000,
183 TxExdCollNum = 0xf00000,
184 TxDataRate = 0x80000,
185 };
186
187 enum PhyCtrlconfigbits {
188 PhyCtrlAne = 0x80000000,
189 PhyCtrlSpd100 = 0x40000000,
190 PhyCtrlSpd10 = 0x20000000,
191 PhyCtrlPhyBaseAddr = 0x1f000000,
192 PhyCtrlDux = 0x800000,
193 PhyCtrlReset = 0x400000,
194 };
195
196 enum FlowCtrlConfigBits {
197 FlowCtrlFullDX = 0x80000000,
198 FlowCtrlEnb = 0x40000000,
199 };
200
201 enum Config0Bits {
202 Cfg0_Reset = 0x80000000,
203 Cfg0_Anaoff = 0x40000000,
204 Cfg0_LDPS = 0x20000000,
205 };
206
207 enum Config1Bits {
208 Cfg1_EarlyRx = 1 << 31,
209 Cfg1_EarlyTx = 1 << 30,
210
211 //rx buffer size
212 Cfg1_Rcv8K = 0x0,
213 Cfg1_Rcv16K = 0x1,
214 Cfg1_Rcv32K = 0x3,
215 Cfg1_Rcv64K = 0x7,
216 Cfg1_Rcv128K = 0xf,
217 };
218
219 enum MiiCmd0Bits {
220 Mii_Divider = 0x20000000,
221 Mii_WRITE = 0x400000,
222 Mii_READ = 0x200000,
223 Mii_SCAN = 0x100000,
224 Mii_Tamod = 0x80000,
225 Mii_Drvmod = 0x40000,
226 Mii_mdc = 0x20000,
227 Mii_mdoen = 0x10000,
228 Mii_mdo = 0x8000,
229 Mii_mdi = 0x4000,
230 };
231
232 enum MiiStatusBits {
233 Mii_StatusBusy = 0x80000000,
234 };
235
236 enum PMConfigBits {
237 PM_Enable = 1 << 31,
238 PM_LongWF = 1 << 30,
239 PM_Magic = 1 << 29,
240 PM_LANWake = 1 << 28,
241 PM_LWPTN = (1 << 27 | 1<< 26),
242 PM_LinkUp = 1 << 25,
243 PM_WakeUp = 1 << 24,
244 };
245
246 /* Locking rules:
247 * priv->lock protects most of the fields of priv and most of the
248 * hardware registers. It does not have to protect against softirqs
249 * between sc92031_disable_interrupts and sc92031_enable_interrupts;
250 * it also does not need to be used in ->open and ->stop while the
251 * device interrupts are off.
252 * Not having to protect against softirqs is very useful due to heavy
253 * use of mdelay() at _sc92031_reset.
254 * Functions prefixed with _sc92031_ must be called with the lock held;
255 * functions prefixed with sc92031_ must be called without the lock held.
256 * Use mmiowb() before unlocking if the hardware was written to.
257 */
258
259 /* Locking rules for the interrupt:
260 * - the interrupt and the tasklet never run at the same time
261 * - neither run between sc92031_disable_interrupts and
262 * sc92031_enable_interrupt
263 */
264
265 struct sc92031_priv {
266 spinlock_t lock;
267 /* iomap.h cookie */
268 void __iomem *port_base;
269 /* pci device structure */
270 struct pci_dev *pdev;
271 /* tasklet */
272 struct tasklet_struct tasklet;
273
274 /* CPU address of rx ring */
275 void *rx_ring;
276 /* PCI address of rx ring */
277 dma_addr_t rx_ring_dma_addr;
278 /* PCI address of rx ring read pointer */
279 dma_addr_t rx_ring_tail;
280
281 /* tx ring write index */
282 unsigned tx_head;
283 /* tx ring read index */
284 unsigned tx_tail;
285 /* CPU address of tx bounce buffer */
286 void *tx_bufs;
287 /* PCI address of tx bounce buffer */
288 dma_addr_t tx_bufs_dma_addr;
289
290 /* copies of some hardware registers */
291 u32 intr_status;
292 atomic_t intr_mask;
293 u32 rx_config;
294 u32 tx_config;
295 u32 pm_config;
296
297 /* copy of some flags from dev->flags */
298 unsigned int mc_flags;
299
300 /* for ETHTOOL_GSTATS */
301 u64 tx_timeouts;
302 u64 rx_loss;
303
304 /* for dev->get_stats */
305 long rx_value;
306 };
307
308 /* I don't know which registers can be safely read; however, I can guess
309 * MAC0 is one of them. */
310 static inline void _sc92031_dummy_read(void __iomem *port_base)
311 {
312 ioread32(port_base + MAC0);
313 }
314
315 static u32 _sc92031_mii_wait(void __iomem *port_base)
316 {
317 u32 mii_status;
318
319 do {
320 udelay(10);
321 mii_status = ioread32(port_base + Miistatus);
322 } while (mii_status & Mii_StatusBusy);
323
324 return mii_status;
325 }
326
327 static u32 _sc92031_mii_cmd(void __iomem *port_base, u32 cmd0, u32 cmd1)
328 {
329 iowrite32(Mii_Divider, port_base + Miicmd0);
330
331 _sc92031_mii_wait(port_base);
332
333 iowrite32(cmd1, port_base + Miicmd1);
334 iowrite32(Mii_Divider | cmd0, port_base + Miicmd0);
335
336 return _sc92031_mii_wait(port_base);
337 }
338
339 static void _sc92031_mii_scan(void __iomem *port_base)
340 {
341 _sc92031_mii_cmd(port_base, Mii_SCAN, 0x1 << 6);
342 }
343
344 static u16 _sc92031_mii_read(void __iomem *port_base, unsigned reg)
345 {
346 return _sc92031_mii_cmd(port_base, Mii_READ, reg << 6) >> 13;
347 }
348
349 static void _sc92031_mii_write(void __iomem *port_base, unsigned reg, u16 val)
350 {
351 _sc92031_mii_cmd(port_base, Mii_WRITE, (reg << 6) | ((u32)val << 11));
352 }
353
354 static void sc92031_disable_interrupts(struct net_device *dev)
355 {
356 struct sc92031_priv *priv = netdev_priv(dev);
357 void __iomem *port_base = priv->port_base;
358
359 /* tell the tasklet/interrupt not to enable interrupts */
360 atomic_set(&priv->intr_mask, 0);
361 wmb();
362
363 /* stop interrupts */
364 iowrite32(0, port_base + IntrMask);
365 _sc92031_dummy_read(port_base);
366 mmiowb();
367
368 /* wait for any concurrent interrupt/tasklet to finish */
369 synchronize_irq(dev->irq);
370 tasklet_disable(&priv->tasklet);
371 }
372
373 static void sc92031_enable_interrupts(struct net_device *dev)
374 {
375 struct sc92031_priv *priv = netdev_priv(dev);
376 void __iomem *port_base = priv->port_base;
377
378 tasklet_enable(&priv->tasklet);
379
380 atomic_set(&priv->intr_mask, IntrBits);
381 wmb();
382
383 iowrite32(IntrBits, port_base + IntrMask);
384 mmiowb();
385 }
386
387 static void _sc92031_disable_tx_rx(struct net_device *dev)
388 {
389 struct sc92031_priv *priv = netdev_priv(dev);
390 void __iomem *port_base = priv->port_base;
391
392 priv->rx_config &= ~RxEnb;
393 priv->tx_config &= ~TxEnb;
394 iowrite32(priv->rx_config, port_base + RxConfig);
395 iowrite32(priv->tx_config, port_base + TxConfig);
396 }
397
398 static void _sc92031_enable_tx_rx(struct net_device *dev)
399 {
400 struct sc92031_priv *priv = netdev_priv(dev);
401 void __iomem *port_base = priv->port_base;
402
403 priv->rx_config |= RxEnb;
404 priv->tx_config |= TxEnb;
405 iowrite32(priv->rx_config, port_base + RxConfig);
406 iowrite32(priv->tx_config, port_base + TxConfig);
407 }
408
409 static void _sc92031_tx_clear(struct net_device *dev)
410 {
411 struct sc92031_priv *priv = netdev_priv(dev);
412
413 while (priv->tx_head - priv->tx_tail > 0) {
414 priv->tx_tail++;
415 dev->stats.tx_dropped++;
416 }
417 priv->tx_head = priv->tx_tail = 0;
418 }
419
420 static void _sc92031_set_mar(struct net_device *dev)
421 {
422 struct sc92031_priv *priv = netdev_priv(dev);
423 void __iomem *port_base = priv->port_base;
424 u32 mar0 = 0, mar1 = 0;
425
426 if ((dev->flags & IFF_PROMISC) ||
427 netdev_mc_count(dev) > multicast_filter_limit ||
428 (dev->flags & IFF_ALLMULTI))
429 mar0 = mar1 = 0xffffffff;
430 else if (dev->flags & IFF_MULTICAST) {
431 struct netdev_hw_addr *ha;
432
433 netdev_for_each_mc_addr(ha, dev) {
434 u32 crc;
435 unsigned bit = 0;
436
437 crc = ~ether_crc(ETH_ALEN, ha->addr);
438 crc >>= 24;
439
440 if (crc & 0x01) bit |= 0x02;
441 if (crc & 0x02) bit |= 0x01;
442 if (crc & 0x10) bit |= 0x20;
443 if (crc & 0x20) bit |= 0x10;
444 if (crc & 0x40) bit |= 0x08;
445 if (crc & 0x80) bit |= 0x04;
446
447 if (bit > 31)
448 mar0 |= 0x1 << (bit - 32);
449 else
450 mar1 |= 0x1 << bit;
451 }
452 }
453
454 iowrite32(mar0, port_base + MAR0);
455 iowrite32(mar1, port_base + MAR0 + 4);
456 }
457
458 static void _sc92031_set_rx_config(struct net_device *dev)
459 {
460 struct sc92031_priv *priv = netdev_priv(dev);
461 void __iomem *port_base = priv->port_base;
462 unsigned int old_mc_flags;
463 u32 rx_config_bits = 0;
464
465 old_mc_flags = priv->mc_flags;
466
467 if (dev->flags & IFF_PROMISC)
468 rx_config_bits |= RxSmall | RxHuge | RxErr | RxBroadcast
469 | RxMulticast | RxAllphys;
470
471 if (dev->flags & (IFF_ALLMULTI | IFF_MULTICAST))
472 rx_config_bits |= RxMulticast;
473
474 if (dev->flags & IFF_BROADCAST)
475 rx_config_bits |= RxBroadcast;
476
477 priv->rx_config &= ~(RxSmall | RxHuge | RxErr | RxBroadcast
478 | RxMulticast | RxAllphys);
479 priv->rx_config |= rx_config_bits;
480
481 priv->mc_flags = dev->flags & (IFF_PROMISC | IFF_ALLMULTI
482 | IFF_MULTICAST | IFF_BROADCAST);
483
484 if (netif_carrier_ok(dev) && priv->mc_flags != old_mc_flags)
485 iowrite32(priv->rx_config, port_base + RxConfig);
486 }
487
488 static bool _sc92031_check_media(struct net_device *dev)
489 {
490 struct sc92031_priv *priv = netdev_priv(dev);
491 void __iomem *port_base = priv->port_base;
492 u16 bmsr;
493
494 bmsr = _sc92031_mii_read(port_base, MII_BMSR);
495 rmb();
496 if (bmsr & BMSR_LSTATUS) {
497 bool speed_100, duplex_full;
498 u32 flow_ctrl_config = 0;
499 u16 output_status = _sc92031_mii_read(port_base,
500 MII_OutputStatus);
501 _sc92031_mii_scan(port_base);
502
503 speed_100 = output_status & 0x2;
504 duplex_full = output_status & 0x4;
505
506 /* Initial Tx/Rx configuration */
507 priv->rx_config = (0x40 << LowThresholdShift) | (0x1c0 << HighThresholdShift);
508 priv->tx_config = 0x48800000;
509
510 /* NOTE: vendor driver had dead code here to enable tx padding */
511
512 if (!speed_100)
513 priv->tx_config |= 0x80000;
514
515 // configure rx mode
516 _sc92031_set_rx_config(dev);
517
518 if (duplex_full) {
519 priv->rx_config |= RxFullDx;
520 priv->tx_config |= TxFullDx;
521 flow_ctrl_config = FlowCtrlFullDX | FlowCtrlEnb;
522 } else {
523 priv->rx_config &= ~RxFullDx;
524 priv->tx_config &= ~TxFullDx;
525 }
526
527 _sc92031_set_mar(dev);
528 _sc92031_set_rx_config(dev);
529 _sc92031_enable_tx_rx(dev);
530 iowrite32(flow_ctrl_config, port_base + FlowCtrlConfig);
531
532 netif_carrier_on(dev);
533
534 if (printk_ratelimit())
535 printk(KERN_INFO "%s: link up, %sMbps, %s-duplex\n",
536 dev->name,
537 speed_100 ? "100" : "10",
538 duplex_full ? "full" : "half");
539 return true;
540 } else {
541 _sc92031_mii_scan(port_base);
542
543 netif_carrier_off(dev);
544
545 _sc92031_disable_tx_rx(dev);
546
547 if (printk_ratelimit())
548 printk(KERN_INFO "%s: link down\n", dev->name);
549 return false;
550 }
551 }
552
553 static void _sc92031_phy_reset(struct net_device *dev)
554 {
555 struct sc92031_priv *priv = netdev_priv(dev);
556 void __iomem *port_base = priv->port_base;
557 u32 phy_ctrl;
558
559 phy_ctrl = ioread32(port_base + PhyCtrl);
560 phy_ctrl &= ~(PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10);
561 phy_ctrl |= PhyCtrlAne | PhyCtrlReset;
562
563 switch (media) {
564 default:
565 case AUTOSELECT:
566 phy_ctrl |= PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10;
567 break;
568 case M10_HALF:
569 phy_ctrl |= PhyCtrlSpd10;
570 break;
571 case M10_FULL:
572 phy_ctrl |= PhyCtrlDux | PhyCtrlSpd10;
573 break;
574 case M100_HALF:
575 phy_ctrl |= PhyCtrlSpd100;
576 break;
577 case M100_FULL:
578 phy_ctrl |= PhyCtrlDux | PhyCtrlSpd100;
579 break;
580 }
581
582 iowrite32(phy_ctrl, port_base + PhyCtrl);
583 mdelay(10);
584
585 phy_ctrl &= ~PhyCtrlReset;
586 iowrite32(phy_ctrl, port_base + PhyCtrl);
587 mdelay(1);
588
589 _sc92031_mii_write(port_base, MII_JAB,
590 PHY_16_JAB_ENB | PHY_16_PORT_ENB);
591 _sc92031_mii_scan(port_base);
592
593 netif_carrier_off(dev);
594 netif_stop_queue(dev);
595 }
596
597 static void _sc92031_reset(struct net_device *dev)
598 {
599 struct sc92031_priv *priv = netdev_priv(dev);
600 void __iomem *port_base = priv->port_base;
601
602 /* disable PM */
603 iowrite32(0, port_base + PMConfig);
604
605 /* soft reset the chip */
606 iowrite32(Cfg0_Reset, port_base + Config0);
607 mdelay(200);
608
609 iowrite32(0, port_base + Config0);
610 mdelay(10);
611
612 /* disable interrupts */
613 iowrite32(0, port_base + IntrMask);
614
615 /* clear multicast address */
616 iowrite32(0, port_base + MAR0);
617 iowrite32(0, port_base + MAR0 + 4);
618
619 /* init rx ring */
620 iowrite32(priv->rx_ring_dma_addr, port_base + RxbufAddr);
621 priv->rx_ring_tail = priv->rx_ring_dma_addr;
622
623 /* init tx ring */
624 _sc92031_tx_clear(dev);
625
626 /* clear old register values */
627 priv->intr_status = 0;
628 atomic_set(&priv->intr_mask, 0);
629 priv->rx_config = 0;
630 priv->tx_config = 0;
631 priv->mc_flags = 0;
632
633 /* configure rx buffer size */
634 /* NOTE: vendor driver had dead code here to enable early tx/rx */
635 iowrite32(Cfg1_Rcv64K, port_base + Config1);
636
637 _sc92031_phy_reset(dev);
638 _sc92031_check_media(dev);
639
640 /* calculate rx fifo overflow */
641 priv->rx_value = 0;
642
643 /* enable PM */
644 iowrite32(priv->pm_config, port_base + PMConfig);
645
646 /* clear intr register */
647 ioread32(port_base + IntrStatus);
648 }
649
650 static void _sc92031_tx_tasklet(struct net_device *dev)
651 {
652 struct sc92031_priv *priv = netdev_priv(dev);
653 void __iomem *port_base = priv->port_base;
654
655 unsigned old_tx_tail;
656 unsigned entry;
657 u32 tx_status;
658
659 old_tx_tail = priv->tx_tail;
660 while (priv->tx_head - priv->tx_tail > 0) {
661 entry = priv->tx_tail % NUM_TX_DESC;
662 tx_status = ioread32(port_base + TxStatus0 + entry * 4);
663
664 if (!(tx_status & (TxStatOK | TxUnderrun | TxAborted)))
665 break;
666
667 priv->tx_tail++;
668
669 if (tx_status & TxStatOK) {
670 dev->stats.tx_bytes += tx_status & 0x1fff;
671 dev->stats.tx_packets++;
672 /* Note: TxCarrierLost is always asserted at 100mbps. */
673 dev->stats.collisions += (tx_status >> 22) & 0xf;
674 }
675
676 if (tx_status & (TxOutOfWindow | TxAborted)) {
677 dev->stats.tx_errors++;
678
679 if (tx_status & TxAborted)
680 dev->stats.tx_aborted_errors++;
681
682 if (tx_status & TxCarrierLost)
683 dev->stats.tx_carrier_errors++;
684
685 if (tx_status & TxOutOfWindow)
686 dev->stats.tx_window_errors++;
687 }
688
689 if (tx_status & TxUnderrun)
690 dev->stats.tx_fifo_errors++;
691 }
692
693 if (priv->tx_tail != old_tx_tail)
694 if (netif_queue_stopped(dev))
695 netif_wake_queue(dev);
696 }
697
698 static void _sc92031_rx_tasklet_error(struct net_device *dev,
699 u32 rx_status, unsigned rx_size)
700 {
701 if(rx_size > (MAX_ETH_FRAME_SIZE + 4) || rx_size < 16) {
702 dev->stats.rx_errors++;
703 dev->stats.rx_length_errors++;
704 }
705
706 if (!(rx_status & RxStatesOK)) {
707 dev->stats.rx_errors++;
708
709 if (rx_status & (RxHugeFrame | RxSmallFrame))
710 dev->stats.rx_length_errors++;
711
712 if (rx_status & RxBadAlign)
713 dev->stats.rx_frame_errors++;
714
715 if (!(rx_status & RxCRCOK))
716 dev->stats.rx_crc_errors++;
717 } else {
718 struct sc92031_priv *priv = netdev_priv(dev);
719 priv->rx_loss++;
720 }
721 }
722
723 static void _sc92031_rx_tasklet(struct net_device *dev)
724 {
725 struct sc92031_priv *priv = netdev_priv(dev);
726 void __iomem *port_base = priv->port_base;
727
728 dma_addr_t rx_ring_head;
729 unsigned rx_len;
730 unsigned rx_ring_offset;
731 void *rx_ring = priv->rx_ring;
732
733 rx_ring_head = ioread32(port_base + RxBufWPtr);
734 rmb();
735
736 /* rx_ring_head is only 17 bits in the RxBufWPtr register.
737 * we need to change it to 32 bits physical address
738 */
739 rx_ring_head &= (dma_addr_t)(RX_BUF_LEN - 1);
740 rx_ring_head |= priv->rx_ring_dma_addr & ~(dma_addr_t)(RX_BUF_LEN - 1);
741 if (rx_ring_head < priv->rx_ring_dma_addr)
742 rx_ring_head += RX_BUF_LEN;
743
744 if (rx_ring_head >= priv->rx_ring_tail)
745 rx_len = rx_ring_head - priv->rx_ring_tail;
746 else
747 rx_len = RX_BUF_LEN - (priv->rx_ring_tail - rx_ring_head);
748
749 if (!rx_len)
750 return;
751
752 if (unlikely(rx_len > RX_BUF_LEN)) {
753 if (printk_ratelimit())
754 printk(KERN_ERR "%s: rx packets length > rx buffer\n",
755 dev->name);
756 return;
757 }
758
759 rx_ring_offset = (priv->rx_ring_tail - priv->rx_ring_dma_addr) % RX_BUF_LEN;
760
761 while (rx_len) {
762 u32 rx_status;
763 unsigned rx_size, rx_size_align, pkt_size;
764 struct sk_buff *skb;
765
766 rx_status = le32_to_cpup((__le32 *)(rx_ring + rx_ring_offset));
767 rmb();
768
769 rx_size = rx_status >> 20;
770 rx_size_align = (rx_size + 3) & ~3; // for 4 bytes aligned
771 pkt_size = rx_size - 4; // Omit the four octet CRC from the length.
772
773 rx_ring_offset = (rx_ring_offset + 4) % RX_BUF_LEN;
774
775 if (unlikely(rx_status == 0 ||
776 rx_size > (MAX_ETH_FRAME_SIZE + 4) ||
777 rx_size < 16 ||
778 !(rx_status & RxStatesOK))) {
779 _sc92031_rx_tasklet_error(dev, rx_status, rx_size);
780 break;
781 }
782
783 if (unlikely(rx_size_align + 4 > rx_len)) {
784 if (printk_ratelimit())
785 printk(KERN_ERR "%s: rx_len is too small\n", dev->name);
786 break;
787 }
788
789 rx_len -= rx_size_align + 4;
790
791 skb = netdev_alloc_skb_ip_align(dev, pkt_size);
792 if (unlikely(!skb)) {
793 if (printk_ratelimit())
794 printk(KERN_ERR "%s: Couldn't allocate a skb_buff for a packet of size %u\n",
795 dev->name, pkt_size);
796 goto next;
797 }
798
799 if ((rx_ring_offset + pkt_size) > RX_BUF_LEN) {
800 memcpy(skb_put(skb, RX_BUF_LEN - rx_ring_offset),
801 rx_ring + rx_ring_offset, RX_BUF_LEN - rx_ring_offset);
802 memcpy(skb_put(skb, pkt_size - (RX_BUF_LEN - rx_ring_offset)),
803 rx_ring, pkt_size - (RX_BUF_LEN - rx_ring_offset));
804 } else {
805 memcpy(skb_put(skb, pkt_size), rx_ring + rx_ring_offset, pkt_size);
806 }
807
808 skb->protocol = eth_type_trans(skb, dev);
809 netif_rx(skb);
810
811 dev->stats.rx_bytes += pkt_size;
812 dev->stats.rx_packets++;
813
814 if (rx_status & Rx_Multicast)
815 dev->stats.multicast++;
816
817 next:
818 rx_ring_offset = (rx_ring_offset + rx_size_align) % RX_BUF_LEN;
819 }
820 mb();
821
822 priv->rx_ring_tail = rx_ring_head;
823 iowrite32(priv->rx_ring_tail, port_base + RxBufRPtr);
824 }
825
826 static void _sc92031_link_tasklet(struct net_device *dev)
827 {
828 if (_sc92031_check_media(dev))
829 netif_wake_queue(dev);
830 else {
831 netif_stop_queue(dev);
832 dev->stats.tx_carrier_errors++;
833 }
834 }
835
836 static void sc92031_tasklet(unsigned long data)
837 {
838 struct net_device *dev = (struct net_device *)data;
839 struct sc92031_priv *priv = netdev_priv(dev);
840 void __iomem *port_base = priv->port_base;
841 u32 intr_status, intr_mask;
842
843 intr_status = priv->intr_status;
844
845 spin_lock(&priv->lock);
846
847 if (unlikely(!netif_running(dev)))
848 goto out;
849
850 if (intr_status & TxOK)
851 _sc92031_tx_tasklet(dev);
852
853 if (intr_status & RxOK)
854 _sc92031_rx_tasklet(dev);
855
856 if (intr_status & RxOverflow)
857 dev->stats.rx_errors++;
858
859 if (intr_status & TimeOut) {
860 dev->stats.rx_errors++;
861 dev->stats.rx_length_errors++;
862 }
863
864 if (intr_status & (LinkFail | LinkOK))
865 _sc92031_link_tasklet(dev);
866
867 out:
868 intr_mask = atomic_read(&priv->intr_mask);
869 rmb();
870
871 iowrite32(intr_mask, port_base + IntrMask);
872 mmiowb();
873
874 spin_unlock(&priv->lock);
875 }
876
877 static irqreturn_t sc92031_interrupt(int irq, void *dev_id)
878 {
879 struct net_device *dev = dev_id;
880 struct sc92031_priv *priv = netdev_priv(dev);
881 void __iomem *port_base = priv->port_base;
882 u32 intr_status, intr_mask;
883
884 /* mask interrupts before clearing IntrStatus */
885 iowrite32(0, port_base + IntrMask);
886 _sc92031_dummy_read(port_base);
887
888 intr_status = ioread32(port_base + IntrStatus);
889 if (unlikely(intr_status == 0xffffffff))
890 return IRQ_NONE; // hardware has gone missing
891
892 intr_status &= IntrBits;
893 if (!intr_status)
894 goto out_none;
895
896 priv->intr_status = intr_status;
897 tasklet_schedule(&priv->tasklet);
898
899 return IRQ_HANDLED;
900
901 out_none:
902 intr_mask = atomic_read(&priv->intr_mask);
903 rmb();
904
905 iowrite32(intr_mask, port_base + IntrMask);
906 mmiowb();
907
908 return IRQ_NONE;
909 }
910
911 static struct net_device_stats *sc92031_get_stats(struct net_device *dev)
912 {
913 struct sc92031_priv *priv = netdev_priv(dev);
914 void __iomem *port_base = priv->port_base;
915
916 // FIXME I do not understand what is this trying to do.
917 if (netif_running(dev)) {
918 int temp;
919
920 spin_lock_bh(&priv->lock);
921
922 /* Update the error count. */
923 temp = (ioread32(port_base + RxStatus0) >> 16) & 0xffff;
924
925 if (temp == 0xffff) {
926 priv->rx_value += temp;
927 dev->stats.rx_fifo_errors = priv->rx_value;
928 } else
929 dev->stats.rx_fifo_errors = temp + priv->rx_value;
930
931 spin_unlock_bh(&priv->lock);
932 }
933
934 return &dev->stats;
935 }
936
937 static netdev_tx_t sc92031_start_xmit(struct sk_buff *skb,
938 struct net_device *dev)
939 {
940 struct sc92031_priv *priv = netdev_priv(dev);
941 void __iomem *port_base = priv->port_base;
942 unsigned len;
943 unsigned entry;
944 u32 tx_status;
945
946 if (unlikely(skb->len > TX_BUF_SIZE)) {
947 dev->stats.tx_dropped++;
948 goto out;
949 }
950
951 spin_lock(&priv->lock);
952
953 if (unlikely(!netif_carrier_ok(dev))) {
954 dev->stats.tx_dropped++;
955 goto out_unlock;
956 }
957
958 BUG_ON(priv->tx_head - priv->tx_tail >= NUM_TX_DESC);
959
960 entry = priv->tx_head++ % NUM_TX_DESC;
961
962 skb_copy_and_csum_dev(skb, priv->tx_bufs + entry * TX_BUF_SIZE);
963
964 len = skb->len;
965 if (len < ETH_ZLEN) {
966 memset(priv->tx_bufs + entry * TX_BUF_SIZE + len,
967 0, ETH_ZLEN - len);
968 len = ETH_ZLEN;
969 }
970
971 wmb();
972
973 if (len < 100)
974 tx_status = len;
975 else if (len < 300)
976 tx_status = 0x30000 | len;
977 else
978 tx_status = 0x50000 | len;
979
980 iowrite32(priv->tx_bufs_dma_addr + entry * TX_BUF_SIZE,
981 port_base + TxAddr0 + entry * 4);
982 iowrite32(tx_status, port_base + TxStatus0 + entry * 4);
983 mmiowb();
984
985 if (priv->tx_head - priv->tx_tail >= NUM_TX_DESC)
986 netif_stop_queue(dev);
987
988 out_unlock:
989 spin_unlock(&priv->lock);
990
991 out:
992 dev_kfree_skb(skb);
993
994 return NETDEV_TX_OK;
995 }
996
997 static int sc92031_open(struct net_device *dev)
998 {
999 int err;
1000 struct sc92031_priv *priv = netdev_priv(dev);
1001 struct pci_dev *pdev = priv->pdev;
1002
1003 priv->rx_ring = pci_alloc_consistent(pdev, RX_BUF_LEN,
1004 &priv->rx_ring_dma_addr);
1005 if (unlikely(!priv->rx_ring)) {
1006 err = -ENOMEM;
1007 goto out_alloc_rx_ring;
1008 }
1009
1010 priv->tx_bufs = pci_alloc_consistent(pdev, TX_BUF_TOT_LEN,
1011 &priv->tx_bufs_dma_addr);
1012 if (unlikely(!priv->tx_bufs)) {
1013 err = -ENOMEM;
1014 goto out_alloc_tx_bufs;
1015 }
1016 priv->tx_head = priv->tx_tail = 0;
1017
1018 err = request_irq(pdev->irq, sc92031_interrupt,
1019 IRQF_SHARED, dev->name, dev);
1020 if (unlikely(err < 0))
1021 goto out_request_irq;
1022
1023 priv->pm_config = 0;
1024
1025 /* Interrupts already disabled by sc92031_stop or sc92031_probe */
1026 spin_lock_bh(&priv->lock);
1027
1028 _sc92031_reset(dev);
1029 mmiowb();
1030
1031 spin_unlock_bh(&priv->lock);
1032 sc92031_enable_interrupts(dev);
1033
1034 if (netif_carrier_ok(dev))
1035 netif_start_queue(dev);
1036 else
1037 netif_tx_disable(dev);
1038
1039 return 0;
1040
1041 out_request_irq:
1042 pci_free_consistent(pdev, TX_BUF_TOT_LEN, priv->tx_bufs,
1043 priv->tx_bufs_dma_addr);
1044 out_alloc_tx_bufs:
1045 pci_free_consistent(pdev, RX_BUF_LEN, priv->rx_ring,
1046 priv->rx_ring_dma_addr);
1047 out_alloc_rx_ring:
1048 return err;
1049 }
1050
1051 static int sc92031_stop(struct net_device *dev)
1052 {
1053 struct sc92031_priv *priv = netdev_priv(dev);
1054 struct pci_dev *pdev = priv->pdev;
1055
1056 netif_tx_disable(dev);
1057
1058 /* Disable interrupts, stop Tx and Rx. */
1059 sc92031_disable_interrupts(dev);
1060
1061 spin_lock_bh(&priv->lock);
1062
1063 _sc92031_disable_tx_rx(dev);
1064 _sc92031_tx_clear(dev);
1065 mmiowb();
1066
1067 spin_unlock_bh(&priv->lock);
1068
1069 free_irq(pdev->irq, dev);
1070 pci_free_consistent(pdev, TX_BUF_TOT_LEN, priv->tx_bufs,
1071 priv->tx_bufs_dma_addr);
1072 pci_free_consistent(pdev, RX_BUF_LEN, priv->rx_ring,
1073 priv->rx_ring_dma_addr);
1074
1075 return 0;
1076 }
1077
1078 static void sc92031_set_multicast_list(struct net_device *dev)
1079 {
1080 struct sc92031_priv *priv = netdev_priv(dev);
1081
1082 spin_lock_bh(&priv->lock);
1083
1084 _sc92031_set_mar(dev);
1085 _sc92031_set_rx_config(dev);
1086 mmiowb();
1087
1088 spin_unlock_bh(&priv->lock);
1089 }
1090
1091 static void sc92031_tx_timeout(struct net_device *dev)
1092 {
1093 struct sc92031_priv *priv = netdev_priv(dev);
1094
1095 /* Disable interrupts by clearing the interrupt mask.*/
1096 sc92031_disable_interrupts(dev);
1097
1098 spin_lock(&priv->lock);
1099
1100 priv->tx_timeouts++;
1101
1102 _sc92031_reset(dev);
1103 mmiowb();
1104
1105 spin_unlock(&priv->lock);
1106
1107 /* enable interrupts */
1108 sc92031_enable_interrupts(dev);
1109
1110 if (netif_carrier_ok(dev))
1111 netif_wake_queue(dev);
1112 }
1113
1114 #ifdef CONFIG_NET_POLL_CONTROLLER
1115 static void sc92031_poll_controller(struct net_device *dev)
1116 {
1117 disable_irq(dev->irq);
1118 if (sc92031_interrupt(dev->irq, dev) != IRQ_NONE)
1119 sc92031_tasklet((unsigned long)dev);
1120 enable_irq(dev->irq);
1121 }
1122 #endif
1123
1124 static int sc92031_ethtool_get_settings(struct net_device *dev,
1125 struct ethtool_cmd *cmd)
1126 {
1127 struct sc92031_priv *priv = netdev_priv(dev);
1128 void __iomem *port_base = priv->port_base;
1129 u8 phy_address;
1130 u32 phy_ctrl;
1131 u16 output_status;
1132
1133 spin_lock_bh(&priv->lock);
1134
1135 phy_address = ioread32(port_base + Miicmd1) >> 27;
1136 phy_ctrl = ioread32(port_base + PhyCtrl);
1137
1138 output_status = _sc92031_mii_read(port_base, MII_OutputStatus);
1139 _sc92031_mii_scan(port_base);
1140 mmiowb();
1141
1142 spin_unlock_bh(&priv->lock);
1143
1144 cmd->supported = SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full
1145 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full
1146 | SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII;
1147
1148 cmd->advertising = ADVERTISED_TP | ADVERTISED_MII;
1149
1150 if ((phy_ctrl & (PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10))
1151 == (PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10))
1152 cmd->advertising |= ADVERTISED_Autoneg;
1153
1154 if ((phy_ctrl & PhyCtrlSpd10) == PhyCtrlSpd10)
1155 cmd->advertising |= ADVERTISED_10baseT_Half;
1156
1157 if ((phy_ctrl & (PhyCtrlSpd10 | PhyCtrlDux))
1158 == (PhyCtrlSpd10 | PhyCtrlDux))
1159 cmd->advertising |= ADVERTISED_10baseT_Full;
1160
1161 if ((phy_ctrl & PhyCtrlSpd100) == PhyCtrlSpd100)
1162 cmd->advertising |= ADVERTISED_100baseT_Half;
1163
1164 if ((phy_ctrl & (PhyCtrlSpd100 | PhyCtrlDux))
1165 == (PhyCtrlSpd100 | PhyCtrlDux))
1166 cmd->advertising |= ADVERTISED_100baseT_Full;
1167
1168 if (phy_ctrl & PhyCtrlAne)
1169 cmd->advertising |= ADVERTISED_Autoneg;
1170
1171 ethtool_cmd_speed_set(cmd,
1172 (output_status & 0x2) ? SPEED_100 : SPEED_10);
1173 cmd->duplex = (output_status & 0x4) ? DUPLEX_FULL : DUPLEX_HALF;
1174 cmd->port = PORT_MII;
1175 cmd->phy_address = phy_address;
1176 cmd->transceiver = XCVR_INTERNAL;
1177 cmd->autoneg = (phy_ctrl & PhyCtrlAne) ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1178
1179 return 0;
1180 }
1181
1182 static int sc92031_ethtool_set_settings(struct net_device *dev,
1183 struct ethtool_cmd *cmd)
1184 {
1185 struct sc92031_priv *priv = netdev_priv(dev);
1186 void __iomem *port_base = priv->port_base;
1187 u32 speed = ethtool_cmd_speed(cmd);
1188 u32 phy_ctrl;
1189 u32 old_phy_ctrl;
1190
1191 if (!(speed == SPEED_10 || speed == SPEED_100))
1192 return -EINVAL;
1193 if (!(cmd->duplex == DUPLEX_HALF || cmd->duplex == DUPLEX_FULL))
1194 return -EINVAL;
1195 if (!(cmd->port == PORT_MII))
1196 return -EINVAL;
1197 if (!(cmd->phy_address == 0x1f))
1198 return -EINVAL;
1199 if (!(cmd->transceiver == XCVR_INTERNAL))
1200 return -EINVAL;
1201 if (!(cmd->autoneg == AUTONEG_DISABLE || cmd->autoneg == AUTONEG_ENABLE))
1202 return -EINVAL;
1203
1204 if (cmd->autoneg == AUTONEG_ENABLE) {
1205 if (!(cmd->advertising & (ADVERTISED_Autoneg
1206 | ADVERTISED_100baseT_Full
1207 | ADVERTISED_100baseT_Half
1208 | ADVERTISED_10baseT_Full
1209 | ADVERTISED_10baseT_Half)))
1210 return -EINVAL;
1211
1212 phy_ctrl = PhyCtrlAne;
1213
1214 // FIXME: I'm not sure what the original code was trying to do
1215 if (cmd->advertising & ADVERTISED_Autoneg)
1216 phy_ctrl |= PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10;
1217 if (cmd->advertising & ADVERTISED_100baseT_Full)
1218 phy_ctrl |= PhyCtrlDux | PhyCtrlSpd100;
1219 if (cmd->advertising & ADVERTISED_100baseT_Half)
1220 phy_ctrl |= PhyCtrlSpd100;
1221 if (cmd->advertising & ADVERTISED_10baseT_Full)
1222 phy_ctrl |= PhyCtrlSpd10 | PhyCtrlDux;
1223 if (cmd->advertising & ADVERTISED_10baseT_Half)
1224 phy_ctrl |= PhyCtrlSpd10;
1225 } else {
1226 // FIXME: Whole branch guessed
1227 phy_ctrl = 0;
1228
1229 if (speed == SPEED_10)
1230 phy_ctrl |= PhyCtrlSpd10;
1231 else /* cmd->speed == SPEED_100 */
1232 phy_ctrl |= PhyCtrlSpd100;
1233
1234 if (cmd->duplex == DUPLEX_FULL)
1235 phy_ctrl |= PhyCtrlDux;
1236 }
1237
1238 spin_lock_bh(&priv->lock);
1239
1240 old_phy_ctrl = ioread32(port_base + PhyCtrl);
1241 phy_ctrl |= old_phy_ctrl & ~(PhyCtrlAne | PhyCtrlDux
1242 | PhyCtrlSpd100 | PhyCtrlSpd10);
1243 if (phy_ctrl != old_phy_ctrl)
1244 iowrite32(phy_ctrl, port_base + PhyCtrl);
1245
1246 spin_unlock_bh(&priv->lock);
1247
1248 return 0;
1249 }
1250
1251 static void sc92031_ethtool_get_wol(struct net_device *dev,
1252 struct ethtool_wolinfo *wolinfo)
1253 {
1254 struct sc92031_priv *priv = netdev_priv(dev);
1255 void __iomem *port_base = priv->port_base;
1256 u32 pm_config;
1257
1258 spin_lock_bh(&priv->lock);
1259 pm_config = ioread32(port_base + PMConfig);
1260 spin_unlock_bh(&priv->lock);
1261
1262 // FIXME: Guessed
1263 wolinfo->supported = WAKE_PHY | WAKE_MAGIC
1264 | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST;
1265 wolinfo->wolopts = 0;
1266
1267 if (pm_config & PM_LinkUp)
1268 wolinfo->wolopts |= WAKE_PHY;
1269
1270 if (pm_config & PM_Magic)
1271 wolinfo->wolopts |= WAKE_MAGIC;
1272
1273 if (pm_config & PM_WakeUp)
1274 // FIXME: Guessed
1275 wolinfo->wolopts |= WAKE_UCAST | WAKE_MCAST | WAKE_BCAST;
1276 }
1277
1278 static int sc92031_ethtool_set_wol(struct net_device *dev,
1279 struct ethtool_wolinfo *wolinfo)
1280 {
1281 struct sc92031_priv *priv = netdev_priv(dev);
1282 void __iomem *port_base = priv->port_base;
1283 u32 pm_config;
1284
1285 spin_lock_bh(&priv->lock);
1286
1287 pm_config = ioread32(port_base + PMConfig)
1288 & ~(PM_LinkUp | PM_Magic | PM_WakeUp);
1289
1290 if (wolinfo->wolopts & WAKE_PHY)
1291 pm_config |= PM_LinkUp;
1292
1293 if (wolinfo->wolopts & WAKE_MAGIC)
1294 pm_config |= PM_Magic;
1295
1296 // FIXME: Guessed
1297 if (wolinfo->wolopts & (WAKE_UCAST | WAKE_MCAST | WAKE_BCAST))
1298 pm_config |= PM_WakeUp;
1299
1300 priv->pm_config = pm_config;
1301 iowrite32(pm_config, port_base + PMConfig);
1302 mmiowb();
1303
1304 spin_unlock_bh(&priv->lock);
1305
1306 return 0;
1307 }
1308
1309 static int sc92031_ethtool_nway_reset(struct net_device *dev)
1310 {
1311 int err = 0;
1312 struct sc92031_priv *priv = netdev_priv(dev);
1313 void __iomem *port_base = priv->port_base;
1314 u16 bmcr;
1315
1316 spin_lock_bh(&priv->lock);
1317
1318 bmcr = _sc92031_mii_read(port_base, MII_BMCR);
1319 if (!(bmcr & BMCR_ANENABLE)) {
1320 err = -EINVAL;
1321 goto out;
1322 }
1323
1324 _sc92031_mii_write(port_base, MII_BMCR, bmcr | BMCR_ANRESTART);
1325
1326 out:
1327 _sc92031_mii_scan(port_base);
1328 mmiowb();
1329
1330 spin_unlock_bh(&priv->lock);
1331
1332 return err;
1333 }
1334
1335 static const char sc92031_ethtool_stats_strings[SILAN_STATS_NUM][ETH_GSTRING_LEN] = {
1336 "tx_timeout",
1337 "rx_loss",
1338 };
1339
1340 static void sc92031_ethtool_get_strings(struct net_device *dev,
1341 u32 stringset, u8 *data)
1342 {
1343 if (stringset == ETH_SS_STATS)
1344 memcpy(data, sc92031_ethtool_stats_strings,
1345 SILAN_STATS_NUM * ETH_GSTRING_LEN);
1346 }
1347
1348 static int sc92031_ethtool_get_sset_count(struct net_device *dev, int sset)
1349 {
1350 switch (sset) {
1351 case ETH_SS_STATS:
1352 return SILAN_STATS_NUM;
1353 default:
1354 return -EOPNOTSUPP;
1355 }
1356 }
1357
1358 static void sc92031_ethtool_get_ethtool_stats(struct net_device *dev,
1359 struct ethtool_stats *stats, u64 *data)
1360 {
1361 struct sc92031_priv *priv = netdev_priv(dev);
1362
1363 spin_lock_bh(&priv->lock);
1364 data[0] = priv->tx_timeouts;
1365 data[1] = priv->rx_loss;
1366 spin_unlock_bh(&priv->lock);
1367 }
1368
1369 static const struct ethtool_ops sc92031_ethtool_ops = {
1370 .get_settings = sc92031_ethtool_get_settings,
1371 .set_settings = sc92031_ethtool_set_settings,
1372 .get_wol = sc92031_ethtool_get_wol,
1373 .set_wol = sc92031_ethtool_set_wol,
1374 .nway_reset = sc92031_ethtool_nway_reset,
1375 .get_link = ethtool_op_get_link,
1376 .get_strings = sc92031_ethtool_get_strings,
1377 .get_sset_count = sc92031_ethtool_get_sset_count,
1378 .get_ethtool_stats = sc92031_ethtool_get_ethtool_stats,
1379 };
1380
1381
1382 static const struct net_device_ops sc92031_netdev_ops = {
1383 .ndo_get_stats = sc92031_get_stats,
1384 .ndo_start_xmit = sc92031_start_xmit,
1385 .ndo_open = sc92031_open,
1386 .ndo_stop = sc92031_stop,
1387 .ndo_set_rx_mode = sc92031_set_multicast_list,
1388 .ndo_change_mtu = eth_change_mtu,
1389 .ndo_validate_addr = eth_validate_addr,
1390 .ndo_set_mac_address = eth_mac_addr,
1391 .ndo_tx_timeout = sc92031_tx_timeout,
1392 #ifdef CONFIG_NET_POLL_CONTROLLER
1393 .ndo_poll_controller = sc92031_poll_controller,
1394 #endif
1395 };
1396
1397 static int __devinit sc92031_probe(struct pci_dev *pdev,
1398 const struct pci_device_id *id)
1399 {
1400 int err;
1401 void __iomem* port_base;
1402 struct net_device *dev;
1403 struct sc92031_priv *priv;
1404 u32 mac0, mac1;
1405 unsigned long base_addr;
1406
1407 err = pci_enable_device(pdev);
1408 if (unlikely(err < 0))
1409 goto out_enable_device;
1410
1411 pci_set_master(pdev);
1412
1413 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1414 if (unlikely(err < 0))
1415 goto out_set_dma_mask;
1416
1417 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1418 if (unlikely(err < 0))
1419 goto out_set_dma_mask;
1420
1421 err = pci_request_regions(pdev, SC92031_NAME);
1422 if (unlikely(err < 0))
1423 goto out_request_regions;
1424
1425 port_base = pci_iomap(pdev, SC92031_USE_BAR, 0);
1426 if (unlikely(!port_base)) {
1427 err = -EIO;
1428 goto out_iomap;
1429 }
1430
1431 dev = alloc_etherdev(sizeof(struct sc92031_priv));
1432 if (unlikely(!dev)) {
1433 err = -ENOMEM;
1434 goto out_alloc_etherdev;
1435 }
1436
1437 pci_set_drvdata(pdev, dev);
1438 SET_NETDEV_DEV(dev, &pdev->dev);
1439
1440 #if SC92031_USE_BAR == 0
1441 dev->mem_start = pci_resource_start(pdev, SC92031_USE_BAR);
1442 dev->mem_end = pci_resource_end(pdev, SC92031_USE_BAR);
1443 #elif SC92031_USE_BAR == 1
1444 dev->base_addr = pci_resource_start(pdev, SC92031_USE_BAR);
1445 #endif
1446 dev->irq = pdev->irq;
1447
1448 /* faked with skb_copy_and_csum_dev */
1449 dev->features = NETIF_F_SG | NETIF_F_HIGHDMA |
1450 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1451
1452 dev->netdev_ops = &sc92031_netdev_ops;
1453 dev->watchdog_timeo = TX_TIMEOUT;
1454 dev->ethtool_ops = &sc92031_ethtool_ops;
1455
1456 priv = netdev_priv(dev);
1457 spin_lock_init(&priv->lock);
1458 priv->port_base = port_base;
1459 priv->pdev = pdev;
1460 tasklet_init(&priv->tasklet, sc92031_tasklet, (unsigned long)dev);
1461 /* Fudge tasklet count so the call to sc92031_enable_interrupts at
1462 * sc92031_open will work correctly */
1463 tasklet_disable_nosync(&priv->tasklet);
1464
1465 /* PCI PM Wakeup */
1466 iowrite32((~PM_LongWF & ~PM_LWPTN) | PM_Enable, port_base + PMConfig);
1467
1468 mac0 = ioread32(port_base + MAC0);
1469 mac1 = ioread32(port_base + MAC0 + 4);
1470 dev->dev_addr[0] = dev->perm_addr[0] = mac0 >> 24;
1471 dev->dev_addr[1] = dev->perm_addr[1] = mac0 >> 16;
1472 dev->dev_addr[2] = dev->perm_addr[2] = mac0 >> 8;
1473 dev->dev_addr[3] = dev->perm_addr[3] = mac0;
1474 dev->dev_addr[4] = dev->perm_addr[4] = mac1 >> 8;
1475 dev->dev_addr[5] = dev->perm_addr[5] = mac1;
1476
1477 err = register_netdev(dev);
1478 if (err < 0)
1479 goto out_register_netdev;
1480
1481 #if SC92031_USE_BAR == 0
1482 base_addr = dev->mem_start;
1483 #elif SC92031_USE_BAR == 1
1484 base_addr = dev->base_addr;
1485 #endif
1486 printk(KERN_INFO "%s: SC92031 at 0x%lx, %pM, IRQ %d\n", dev->name,
1487 base_addr, dev->dev_addr, dev->irq);
1488
1489 return 0;
1490
1491 out_register_netdev:
1492 free_netdev(dev);
1493 out_alloc_etherdev:
1494 pci_iounmap(pdev, port_base);
1495 out_iomap:
1496 pci_release_regions(pdev);
1497 out_request_regions:
1498 out_set_dma_mask:
1499 pci_disable_device(pdev);
1500 out_enable_device:
1501 return err;
1502 }
1503
1504 static void __devexit sc92031_remove(struct pci_dev *pdev)
1505 {
1506 struct net_device *dev = pci_get_drvdata(pdev);
1507 struct sc92031_priv *priv = netdev_priv(dev);
1508 void __iomem* port_base = priv->port_base;
1509
1510 unregister_netdev(dev);
1511 free_netdev(dev);
1512 pci_iounmap(pdev, port_base);
1513 pci_release_regions(pdev);
1514 pci_disable_device(pdev);
1515 }
1516
1517 static int sc92031_suspend(struct pci_dev *pdev, pm_message_t state)
1518 {
1519 struct net_device *dev = pci_get_drvdata(pdev);
1520 struct sc92031_priv *priv = netdev_priv(dev);
1521
1522 pci_save_state(pdev);
1523
1524 if (!netif_running(dev))
1525 goto out;
1526
1527 netif_device_detach(dev);
1528
1529 /* Disable interrupts, stop Tx and Rx. */
1530 sc92031_disable_interrupts(dev);
1531
1532 spin_lock_bh(&priv->lock);
1533
1534 _sc92031_disable_tx_rx(dev);
1535 _sc92031_tx_clear(dev);
1536 mmiowb();
1537
1538 spin_unlock_bh(&priv->lock);
1539
1540 out:
1541 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1542
1543 return 0;
1544 }
1545
1546 static int sc92031_resume(struct pci_dev *pdev)
1547 {
1548 struct net_device *dev = pci_get_drvdata(pdev);
1549 struct sc92031_priv *priv = netdev_priv(dev);
1550
1551 pci_restore_state(pdev);
1552 pci_set_power_state(pdev, PCI_D0);
1553
1554 if (!netif_running(dev))
1555 goto out;
1556
1557 /* Interrupts already disabled by sc92031_suspend */
1558 spin_lock_bh(&priv->lock);
1559
1560 _sc92031_reset(dev);
1561 mmiowb();
1562
1563 spin_unlock_bh(&priv->lock);
1564 sc92031_enable_interrupts(dev);
1565
1566 netif_device_attach(dev);
1567
1568 if (netif_carrier_ok(dev))
1569 netif_wake_queue(dev);
1570 else
1571 netif_tx_disable(dev);
1572
1573 out:
1574 return 0;
1575 }
1576
1577 static DEFINE_PCI_DEVICE_TABLE(sc92031_pci_device_id_table) = {
1578 { PCI_DEVICE(PCI_VENDOR_ID_SILAN, 0x2031) },
1579 { PCI_DEVICE(PCI_VENDOR_ID_SILAN, 0x8139) },
1580 { PCI_DEVICE(0x1088, 0x2031) },
1581 { 0, }
1582 };
1583 MODULE_DEVICE_TABLE(pci, sc92031_pci_device_id_table);
1584
1585 static struct pci_driver sc92031_pci_driver = {
1586 .name = SC92031_NAME,
1587 .id_table = sc92031_pci_device_id_table,
1588 .probe = sc92031_probe,
1589 .remove = __devexit_p(sc92031_remove),
1590 .suspend = sc92031_suspend,
1591 .resume = sc92031_resume,
1592 };
1593
1594 static int __init sc92031_init(void)
1595 {
1596 return pci_register_driver(&sc92031_pci_driver);
1597 }
1598
1599 static void __exit sc92031_exit(void)
1600 {
1601 pci_unregister_driver(&sc92031_pci_driver);
1602 }
1603
1604 module_init(sc92031_init);
1605 module_exit(sc92031_exit);
1606
1607 MODULE_LICENSE("GPL");
1608 MODULE_AUTHOR("Cesar Eduardo Barros <cesarb@cesarb.net>");
1609 MODULE_DESCRIPTION("Silan SC92031 PCI Fast Ethernet Adapter driver");