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Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
[linux-2.6-block.git] / drivers / net / sc92031.c
CommitLineData
bf345707
CEB		 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
627af770
CEB		 16 *
17 * A datasheet for this chip can be found at
18 * http://www.silan.com.cn/english/products/pdf/SC92031AY.pdf
bf345707
CEB		 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/module.h>
26#include <linux/kernel.h>
27#include <linux/delay.h>
28#include <linux/pci.h>
29#include <linux/dma-mapping.h>
30#include <linux/netdevice.h>
31#include <linux/etherdevice.h>
32#include <linux/ethtool.h>
33#include <linux/crc32.h>
34
35#include <asm/irq.h>
36
bf345707 37#define SC92031_NAME "sc92031"
bf345707
CEB		 38
39/* BAR 0 is MMIO, BAR 1 is PIO */
40#ifndef SC92031_USE_BAR
41#define SC92031_USE_BAR 0
42#endif
43
44/* Maximum number of multicast addresses to filter (vs. Rx-all-multicast). */
45static int multicast_filter_limit = 64;
46module_param(multicast_filter_limit, int, 0);
47MODULE_PARM_DESC(multicast_filter_limit,
48 "Maximum number of filtered multicast addresses");
49
50static int media;
51module_param(media, int, 0);
52MODULE_PARM_DESC(media, "Media type (0x00 = autodetect,"
53 " 0x01 = 10M half, 0x02 = 10M full,"
54 " 0x04 = 100M half, 0x08 = 100M full)");
55
56/* Size of the in-memory receive ring. */
57#define RX_BUF_LEN_IDX 3 /* 0==8K, 1==16K, 2==32K, 3==64K ,4==128K*/
58#define RX_BUF_LEN (8192 << RX_BUF_LEN_IDX)
59
60/* Number of Tx descriptor registers. */
61#define NUM_TX_DESC 4
62
63/* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/
64#define MAX_ETH_FRAME_SIZE 1536
65
66/* Size of the Tx bounce buffers -- must be at least (dev->mtu+14+4). */
67#define TX_BUF_SIZE MAX_ETH_FRAME_SIZE
68#define TX_BUF_TOT_LEN (TX_BUF_SIZE * NUM_TX_DESC)
69
70/* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
71#define RX_FIFO_THRESH 7 /* Rx buffer level before first PCI xfer. */
72
73/* Time in jiffies before concluding the transmitter is hung. */
74#define TX_TIMEOUT (4*HZ)
75
76#define SILAN_STATS_NUM 2 /* number of ETHTOOL_GSTATS */
77
78/* media options */
79#define AUTOSELECT 0x00
80#define M10_HALF 0x01
81#define M10_FULL 0x02
82#define M100_HALF 0x04
83#define M100_FULL 0x08
84
85 /* Symbolic offsets to registers. */
86enum silan_registers {
87 Config0 = 0x00, // Config0
88 Config1 = 0x04, // Config1
89 RxBufWPtr = 0x08, // Rx buffer writer poiter
90 IntrStatus = 0x0C, // Interrupt status
91 IntrMask = 0x10, // Interrupt mask
92 RxbufAddr = 0x14, // Rx buffer start address
93 RxBufRPtr = 0x18, // Rx buffer read pointer
94 Txstatusall = 0x1C, // Transmit status of all descriptors
95 TxStatus0 = 0x20, // Transmit status (Four 32bit registers).
96 TxAddr0 = 0x30, // Tx descriptors (also four 32bit).
97 RxConfig = 0x40, // Rx configuration
98 MAC0 = 0x44, // Ethernet hardware address.
99 MAR0 = 0x4C, // Multicast filter.
100 RxStatus0 = 0x54, // Rx status
101 TxConfig = 0x5C, // Tx configuration
102 PhyCtrl = 0x60, // physical control
103 FlowCtrlConfig = 0x64, // flow control
104 Miicmd0 = 0x68, // Mii command0 register
105 Miicmd1 = 0x6C, // Mii command1 register
106 Miistatus = 0x70, // Mii status register
107 Timercnt = 0x74, // Timer counter register
108 TimerIntr = 0x78, // Timer interrupt register
109 PMConfig = 0x7C, // Power Manager configuration
110 CRC0 = 0x80, // Power Manager CRC ( Two 32bit regisers)
111 Wakeup0 = 0x88, // power Manager wakeup( Eight 64bit regiser)
112 LSBCRC0 = 0xC8, // power Manager LSBCRC(Two 32bit regiser)
113 TestD0 = 0xD0,
114 TestD4 = 0xD4,
115 TestD8 = 0xD8,
116};
117
118#define MII_BMCR 0 // Basic mode control register
119#define MII_BMSR 1 // Basic mode status register
120#define MII_JAB 16
121#define MII_OutputStatus 24
122
123#define BMCR_FULLDPLX 0x0100 // Full duplex
124#define BMCR_ANRESTART 0x0200 // Auto negotiation restart
125#define BMCR_ANENABLE 0x1000 // Enable auto negotiation
126#define BMCR_SPEED100 0x2000 // Select 100Mbps
127#define BMSR_LSTATUS 0x0004 // Link status
128#define PHY_16_JAB_ENB 0x1000
129#define PHY_16_PORT_ENB 0x1
130
131enum IntrStatusBits {
132 LinkFail = 0x80000000,
133 LinkOK = 0x40000000,
134 TimeOut = 0x20000000,
135 RxOverflow = 0x0040,
136 RxOK = 0x0020,
137 TxOK = 0x0001,
138 IntrBits = LinkFail|LinkOK|TimeOut|RxOverflow|RxOK|TxOK,
139};
140
141enum TxStatusBits {
142 TxCarrierLost = 0x20000000,
143 TxAborted = 0x10000000,
144 TxOutOfWindow = 0x08000000,
145 TxNccShift = 22,
146 EarlyTxThresShift = 16,
147 TxStatOK = 0x8000,
148 TxUnderrun = 0x4000,
149 TxOwn = 0x2000,
150};
151
152enum RxStatusBits {
153 RxStatesOK = 0x80000,
154 RxBadAlign = 0x40000,
155 RxHugeFrame = 0x20000,
156 RxSmallFrame = 0x10000,
157 RxCRCOK = 0x8000,
158 RxCrlFrame = 0x4000,
159 Rx_Broadcast = 0x2000,
160 Rx_Multicast = 0x1000,
161 RxAddrMatch = 0x0800,
162 MiiErr = 0x0400,
163};
164
165enum RxConfigBits {
166 RxFullDx = 0x80000000,
167 RxEnb = 0x40000000,
168 RxSmall = 0x20000000,
169 RxHuge = 0x10000000,
170 RxErr = 0x08000000,
171 RxAllphys = 0x04000000,
172 RxMulticast = 0x02000000,
173 RxBroadcast = 0x01000000,
174 RxLoopBack = (1 << 23) | (1 << 22),
175 LowThresholdShift = 12,
176 HighThresholdShift = 2,
177};
178
179enum TxConfigBits {
180 TxFullDx = 0x80000000,
181 TxEnb = 0x40000000,
182 TxEnbPad = 0x20000000,
183 TxEnbHuge = 0x10000000,
184 TxEnbFCS = 0x08000000,
185 TxNoBackOff = 0x04000000,
186 TxEnbPrem = 0x02000000,
187 TxCareLostCrs = 0x1000000,
188 TxExdCollNum = 0xf00000,
189 TxDataRate = 0x80000,
190};
191
192enum PhyCtrlconfigbits {
193 PhyCtrlAne = 0x80000000,
194 PhyCtrlSpd100 = 0x40000000,
195 PhyCtrlSpd10 = 0x20000000,
196 PhyCtrlPhyBaseAddr = 0x1f000000,
197 PhyCtrlDux = 0x800000,
198 PhyCtrlReset = 0x400000,
199};
200
201enum FlowCtrlConfigBits {
202 FlowCtrlFullDX = 0x80000000,
203 FlowCtrlEnb = 0x40000000,
204};
205
206enum Config0Bits {
207 Cfg0_Reset = 0x80000000,
208 Cfg0_Anaoff = 0x40000000,
209 Cfg0_LDPS = 0x20000000,
210};
211
212enum Config1Bits {
213 Cfg1_EarlyRx = 1 << 31,
214 Cfg1_EarlyTx = 1 << 30,
215
216 //rx buffer size
217 Cfg1_Rcv8K = 0x0,
218 Cfg1_Rcv16K = 0x1,
219 Cfg1_Rcv32K = 0x3,
220 Cfg1_Rcv64K = 0x7,
221 Cfg1_Rcv128K = 0xf,
222};
223
224enum MiiCmd0Bits {
225 Mii_Divider = 0x20000000,
226 Mii_WRITE = 0x400000,
227 Mii_READ = 0x200000,
228 Mii_SCAN = 0x100000,
229 Mii_Tamod = 0x80000,
230 Mii_Drvmod = 0x40000,
231 Mii_mdc = 0x20000,
232 Mii_mdoen = 0x10000,
233 Mii_mdo = 0x8000,
234 Mii_mdi = 0x4000,
235};
236
237enum MiiStatusBits {
238 Mii_StatusBusy = 0x80000000,
239};
240
241enum PMConfigBits {
242 PM_Enable = 1 << 31,
243 PM_LongWF = 1 << 30,
244 PM_Magic = 1 << 29,
245 PM_LANWake = 1 << 28,
246 PM_LWPTN = (1 << 27 | 1<< 26),
247 PM_LinkUp = 1 << 25,
248 PM_WakeUp = 1 << 24,
249};
250
251/* Locking rules:
252 * priv->lock protects most of the fields of priv and most of the
253 * hardware registers. It does not have to protect against softirqs
254 * between sc92031_disable_interrupts and sc92031_enable_interrupts;
255 * it also does not need to be used in ->open and ->stop while the
256 * device interrupts are off.
257 * Not having to protect against softirqs is very useful due to heavy
258 * use of mdelay() at _sc92031_reset.
259 * Functions prefixed with _sc92031_ must be called with the lock held;
260 * functions prefixed with sc92031_ must be called without the lock held.
261 * Use mmiowb() before unlocking if the hardware was written to.
262 */
263
264/* Locking rules for the interrupt:
265 * - the interrupt and the tasklet never run at the same time
266 * - neither run between sc92031_disable_interrupts and
267 * sc92031_enable_interrupt
268 */
269
270struct sc92031_priv {
271 spinlock_t lock;
272 /* iomap.h cookie */
273 void __iomem *port_base;
274 /* pci device structure */
275 struct pci_dev *pdev;
276 /* tasklet */
277 struct tasklet_struct tasklet;
278
279 /* CPU address of rx ring */
280 void *rx_ring;
281 /* PCI address of rx ring */
282 dma_addr_t rx_ring_dma_addr;
283 /* PCI address of rx ring read pointer */
284 dma_addr_t rx_ring_tail;
285
286 /* tx ring write index */
287 unsigned tx_head;
288 /* tx ring read index */
289 unsigned tx_tail;
290 /* CPU address of tx bounce buffer */
291 void *tx_bufs;
292 /* PCI address of tx bounce buffer */
293 dma_addr_t tx_bufs_dma_addr;
294
295 /* copies of some hardware registers */
296 u32 intr_status;
297 atomic_t intr_mask;
298 u32 rx_config;
299 u32 tx_config;
300 u32 pm_config;
301
302 /* copy of some flags from dev->flags */
303 unsigned int mc_flags;
304
305 /* for ETHTOOL_GSTATS */
306 u64 tx_timeouts;
307 u64 rx_loss;
308
309 /* for dev->get_stats */
310 long rx_value;
bf345707
CEB		 311};
312
313/* I don't know which registers can be safely read; however, I can guess
314 * MAC0 is one of them. */
315static inline void _sc92031_dummy_read(void __iomem *port_base)
316{
317 ioread32(port_base + MAC0);
318}
319
320static u32 _sc92031_mii_wait(void __iomem *port_base)
321{
322 u32 mii_status;
323
324 do {
325 udelay(10);
326 mii_status = ioread32(port_base + Miistatus);
327 } while (mii_status & Mii_StatusBusy);
328
329 return mii_status;
330}
331
332static u32 _sc92031_mii_cmd(void __iomem *port_base, u32 cmd0, u32 cmd1)
333{
334 iowrite32(Mii_Divider, port_base + Miicmd0);
335
336 _sc92031_mii_wait(port_base);
337
338 iowrite32(cmd1, port_base + Miicmd1);
339 iowrite32(Mii_Divider | cmd0, port_base + Miicmd0);
340
341 return _sc92031_mii_wait(port_base);
342}
343
344static void _sc92031_mii_scan(void __iomem *port_base)
345{
346 _sc92031_mii_cmd(port_base, Mii_SCAN, 0x1 << 6);
347}
348
349static u16 _sc92031_mii_read(void __iomem *port_base, unsigned reg)
350{
351 return _sc92031_mii_cmd(port_base, Mii_READ, reg << 6) >> 13;
352}
353
354static void _sc92031_mii_write(void __iomem *port_base, unsigned reg, u16 val)
355{
356 _sc92031_mii_cmd(port_base, Mii_WRITE, (reg << 6) | ((u32)val << 11));
357}
358
359static void sc92031_disable_interrupts(struct net_device *dev)
360{
361 struct sc92031_priv *priv = netdev_priv(dev);
362 void __iomem *port_base = priv->port_base;
363
364 /* tell the tasklet/interrupt not to enable interrupts */
365 atomic_set(&priv->intr_mask, 0);
366 wmb();
367
368 /* stop interrupts */
369 iowrite32(0, port_base + IntrMask);
370 _sc92031_dummy_read(port_base);
371 mmiowb();
372
373 /* wait for any concurrent interrupt/tasklet to finish */
374 synchronize_irq(dev->irq);
375 tasklet_disable(&priv->tasklet);
376}
377
378static void sc92031_enable_interrupts(struct net_device *dev)
379{
380 struct sc92031_priv *priv = netdev_priv(dev);
381 void __iomem *port_base = priv->port_base;
382
383 tasklet_enable(&priv->tasklet);
384
385 atomic_set(&priv->intr_mask, IntrBits);
386 wmb();
387
388 iowrite32(IntrBits, port_base + IntrMask);
389 mmiowb();
390}
391
392static void _sc92031_disable_tx_rx(struct net_device *dev)
393{
394 struct sc92031_priv *priv = netdev_priv(dev);
395 void __iomem *port_base = priv->port_base;
396
397 priv->rx_config &= ~RxEnb;
398 priv->tx_config &= ~TxEnb;
399 iowrite32(priv->rx_config, port_base + RxConfig);
400 iowrite32(priv->tx_config, port_base + TxConfig);
401}
402
403static void _sc92031_enable_tx_rx(struct net_device *dev)
404{
405 struct sc92031_priv *priv = netdev_priv(dev);
406 void __iomem *port_base = priv->port_base;
407
408 priv->rx_config |= RxEnb;
409 priv->tx_config |= TxEnb;
410 iowrite32(priv->rx_config, port_base + RxConfig);
411 iowrite32(priv->tx_config, port_base + TxConfig);
412}
413
414static void _sc92031_tx_clear(struct net_device *dev)
415{
416 struct sc92031_priv *priv = netdev_priv(dev);
417
418 while (priv->tx_head - priv->tx_tail > 0) {
419 priv->tx_tail++;
9c28eaea 420 dev->stats.tx_dropped++;
bf345707
CEB		 421 }
422 priv->tx_head = priv->tx_tail = 0;
423}
424
425static void _sc92031_set_mar(struct net_device *dev)
426{
427 struct sc92031_priv *priv = netdev_priv(dev);
428 void __iomem *port_base = priv->port_base;
429 u32 mar0 = 0, mar1 = 0;
430
431 if ((dev->flags & IFF_PROMISC)
432 || dev->mc_count > multicast_filter_limit
433 || (dev->flags & IFF_ALLMULTI))
434 mar0 = mar1 = 0xffffffff;
435 else if (dev->flags & IFF_MULTICAST) {
436 struct dev_mc_list *mc_list;
437
438 for (mc_list = dev->mc_list; mc_list; mc_list = mc_list->next) {
439 u32 crc;
440 unsigned bit = 0;
441
442 crc = ~ether_crc(ETH_ALEN, mc_list->dmi_addr);
443 crc >>= 24;
444
445 if (crc & 0x01) bit |= 0x02;
446 if (crc & 0x02) bit |= 0x01;
447 if (crc & 0x10) bit |= 0x20;
448 if (crc & 0x20) bit |= 0x10;
449 if (crc & 0x40) bit |= 0x08;
450 if (crc & 0x80) bit |= 0x04;
451
452 if (bit > 31)
453 mar0 |= 0x1 << (bit - 32);
454 else
455 mar1 |= 0x1 << bit;
456 }
457 }
458
459 iowrite32(mar0, port_base + MAR0);
460 iowrite32(mar1, port_base + MAR0 + 4);
461}
462
463static void _sc92031_set_rx_config(struct net_device *dev)
464{
465 struct sc92031_priv *priv = netdev_priv(dev);
466 void __iomem *port_base = priv->port_base;
467 unsigned int old_mc_flags;
468 u32 rx_config_bits = 0;
469
470 old_mc_flags = priv->mc_flags;
471
472 if (dev->flags & IFF_PROMISC)
473 rx_config_bits |= RxSmall | RxHuge | RxErr | RxBroadcast
474 | RxMulticast | RxAllphys;
475
476 if (dev->flags & (IFF_ALLMULTI | IFF_MULTICAST))
477 rx_config_bits |= RxMulticast;
478
479 if (dev->flags & IFF_BROADCAST)
480 rx_config_bits |= RxBroadcast;
481
482 priv->rx_config &= ~(RxSmall | RxHuge | RxErr | RxBroadcast
483 | RxMulticast | RxAllphys);
484 priv->rx_config |= rx_config_bits;
485
486 priv->mc_flags = dev->flags & (IFF_PROMISC | IFF_ALLMULTI
487 | IFF_MULTICAST | IFF_BROADCAST);
488
489 if (netif_carrier_ok(dev) && priv->mc_flags != old_mc_flags)
490 iowrite32(priv->rx_config, port_base + RxConfig);
491}
492
493static bool _sc92031_check_media(struct net_device *dev)
494{
495 struct sc92031_priv *priv = netdev_priv(dev);
496 void __iomem *port_base = priv->port_base;
497 u16 bmsr;
498
499 bmsr = _sc92031_mii_read(port_base, MII_BMSR);
500 rmb();
501 if (bmsr & BMSR_LSTATUS) {
502 bool speed_100, duplex_full;
503 u32 flow_ctrl_config = 0;
504 u16 output_status = _sc92031_mii_read(port_base,
505 MII_OutputStatus);
506 _sc92031_mii_scan(port_base);
507
508 speed_100 = output_status & 0x2;
509 duplex_full = output_status & 0x4;
510
511 /* Initial Tx/Rx configuration */
512 priv->rx_config = (0x40 << LowThresholdShift) | (0x1c0 << HighThresholdShift);
513 priv->tx_config = 0x48800000;
514
515 /* NOTE: vendor driver had dead code here to enable tx padding */
516
517 if (!speed_100)
518 priv->tx_config |= 0x80000;
519
520 // configure rx mode
521 _sc92031_set_rx_config(dev);
522
523 if (duplex_full) {
524 priv->rx_config |= RxFullDx;
525 priv->tx_config |= TxFullDx;
526 flow_ctrl_config = FlowCtrlFullDX | FlowCtrlEnb;
527 } else {
528 priv->rx_config &= ~RxFullDx;
529 priv->tx_config &= ~TxFullDx;
530 }
531
532 _sc92031_set_mar(dev);
533 _sc92031_set_rx_config(dev);
534 _sc92031_enable_tx_rx(dev);
535 iowrite32(flow_ctrl_config, port_base + FlowCtrlConfig);
536
537 netif_carrier_on(dev);
538
539 if (printk_ratelimit())
540 printk(KERN_INFO "%s: link up, %sMbps, %s-duplex\n",
541 dev->name,
542 speed_100 ? "100" : "10",
543 duplex_full ? "full" : "half");
544 return true;
545 } else {
546 _sc92031_mii_scan(port_base);
547
548 netif_carrier_off(dev);
549
550 _sc92031_disable_tx_rx(dev);
551
552 if (printk_ratelimit())
553 printk(KERN_INFO "%s: link down\n", dev->name);
554 return false;
555 }
556}
557
558static void _sc92031_phy_reset(struct net_device *dev)
559{
560 struct sc92031_priv *priv = netdev_priv(dev);
561 void __iomem *port_base = priv->port_base;
562 u32 phy_ctrl;
563
564 phy_ctrl = ioread32(port_base + PhyCtrl);
565 phy_ctrl &= ~(PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10);
566 phy_ctrl |= PhyCtrlAne | PhyCtrlReset;
567
568 switch (media) {
569 default:
570 case AUTOSELECT:
571 phy_ctrl |= PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10;
572 break;
573 case M10_HALF:
574 phy_ctrl |= PhyCtrlSpd10;
575 break;
576 case M10_FULL:
577 phy_ctrl |= PhyCtrlDux | PhyCtrlSpd10;
578 break;
579 case M100_HALF:
580 phy_ctrl |= PhyCtrlSpd100;
581 break;
582 case M100_FULL:
583 phy_ctrl |= PhyCtrlDux | PhyCtrlSpd100;
584 break;
585 }
586
587 iowrite32(phy_ctrl, port_base + PhyCtrl);
588 mdelay(10);
589
590 phy_ctrl &= ~PhyCtrlReset;
591 iowrite32(phy_ctrl, port_base + PhyCtrl);
592 mdelay(1);
593
594 _sc92031_mii_write(port_base, MII_JAB,
595 PHY_16_JAB_ENB | PHY_16_PORT_ENB);
596 _sc92031_mii_scan(port_base);
597
598 netif_carrier_off(dev);
599 netif_stop_queue(dev);
600}
601
602static void _sc92031_reset(struct net_device *dev)
603{
604 struct sc92031_priv *priv = netdev_priv(dev);
605 void __iomem *port_base = priv->port_base;
606
607 /* disable PM */
608 iowrite32(0, port_base + PMConfig);
609
610 /* soft reset the chip */
611 iowrite32(Cfg0_Reset, port_base + Config0);
612 mdelay(200);
613
614 iowrite32(0, port_base + Config0);
615 mdelay(10);
616
617 /* disable interrupts */
618 iowrite32(0, port_base + IntrMask);
619
620 /* clear multicast address */
621 iowrite32(0, port_base + MAR0);
622 iowrite32(0, port_base + MAR0 + 4);
623
624 /* init rx ring */
625 iowrite32(priv->rx_ring_dma_addr, port_base + RxbufAddr);
626 priv->rx_ring_tail = priv->rx_ring_dma_addr;
627
628 /* init tx ring */
629 _sc92031_tx_clear(dev);
630
631 /* clear old register values */
632 priv->intr_status = 0;
633 atomic_set(&priv->intr_mask, 0);
634 priv->rx_config = 0;
635 priv->tx_config = 0;
636 priv->mc_flags = 0;
637
638 /* configure rx buffer size */
639 /* NOTE: vendor driver had dead code here to enable early tx/rx */
640 iowrite32(Cfg1_Rcv64K, port_base + Config1);
641
642 _sc92031_phy_reset(dev);
643 _sc92031_check_media(dev);
644
645 /* calculate rx fifo overflow */
646 priv->rx_value = 0;
647
648 /* enable PM */
649 iowrite32(priv->pm_config, port_base + PMConfig);
650
651 /* clear intr register */
652 ioread32(port_base + IntrStatus);
653}
654
655static void _sc92031_tx_tasklet(struct net_device *dev)
656{
657 struct sc92031_priv *priv = netdev_priv(dev);
658 void __iomem *port_base = priv->port_base;
659
660 unsigned old_tx_tail;
661 unsigned entry;
662 u32 tx_status;
663
664 old_tx_tail = priv->tx_tail;
665 while (priv->tx_head - priv->tx_tail > 0) {
666 entry = priv->tx_tail % NUM_TX_DESC;
667 tx_status = ioread32(port_base + TxStatus0 + entry * 4);
668
669 if (!(tx_status & (TxStatOK | TxUnderrun | TxAborted)))
670 break;
671
672 priv->tx_tail++;
673
674 if (tx_status & TxStatOK) {
9c28eaea
SH		 675 dev->stats.tx_bytes += tx_status & 0x1fff;
676 dev->stats.tx_packets++;
bf345707 677 /* Note: TxCarrierLost is always asserted at 100mbps. */
9c28eaea 678 dev->stats.collisions += (tx_status >> 22) & 0xf;
bf345707
CEB		 679 }
680
681 if (tx_status & (TxOutOfWindow | TxAborted)) {
9c28eaea 682 dev->stats.tx_errors++;
bf345707
CEB		 683
684 if (tx_status & TxAborted)
9c28eaea 685 dev->stats.tx_aborted_errors++;
bf345707
CEB		 686
687 if (tx_status & TxCarrierLost)
9c28eaea 688 dev->stats.tx_carrier_errors++;
bf345707
CEB		 689
690 if (tx_status & TxOutOfWindow)
9c28eaea 691 dev->stats.tx_window_errors++;
bf345707
CEB		 692 }
693
694 if (tx_status & TxUnderrun)
9c28eaea 695 dev->stats.tx_fifo_errors++;
bf345707
CEB		 696 }
697
698 if (priv->tx_tail != old_tx_tail)
699 if (netif_queue_stopped(dev))
700 netif_wake_queue(dev);
701}
702
9c28eaea
SH		 703static void _sc92031_rx_tasklet_error(struct net_device *dev,
704 u32 rx_status, unsigned rx_size)
bf345707
CEB		 705{
706 if(rx_size > (MAX_ETH_FRAME_SIZE + 4) || rx_size < 16) {
9c28eaea
SH		 707 dev->stats.rx_errors++;
708 dev->stats.rx_length_errors++;
bf345707
CEB		 709 }
710
711 if (!(rx_status & RxStatesOK)) {
9c28eaea 712 dev->stats.rx_errors++;
bf345707
CEB		 713
714 if (rx_status & (RxHugeFrame | RxSmallFrame))
9c28eaea 715 dev->stats.rx_length_errors++;
bf345707
CEB		 716
717 if (rx_status & RxBadAlign)
9c28eaea 718 dev->stats.rx_frame_errors++;
bf345707
CEB		 719
720 if (!(rx_status & RxCRCOK))
9c28eaea
SH		 721 dev->stats.rx_crc_errors++;
722 } else {
723 struct sc92031_priv *priv = netdev_priv(dev);
bf345707 724 priv->rx_loss++;
9c28eaea 725 }
bf345707
CEB		 726}
727
728static void _sc92031_rx_tasklet(struct net_device *dev)
729{
730 struct sc92031_priv *priv = netdev_priv(dev);
731 void __iomem *port_base = priv->port_base;
732
733 dma_addr_t rx_ring_head;
734 unsigned rx_len;
735 unsigned rx_ring_offset;
736 void *rx_ring = priv->rx_ring;
737
738 rx_ring_head = ioread32(port_base + RxBufWPtr);
739 rmb();
740
741 /* rx_ring_head is only 17 bits in the RxBufWPtr register.
742 * we need to change it to 32 bits physical address
743 */
744 rx_ring_head &= (dma_addr_t)(RX_BUF_LEN - 1);
745 rx_ring_head |= priv->rx_ring_dma_addr & ~(dma_addr_t)(RX_BUF_LEN - 1);
746 if (rx_ring_head < priv->rx_ring_dma_addr)
747 rx_ring_head += RX_BUF_LEN;
748
749 if (rx_ring_head >= priv->rx_ring_tail)
750 rx_len = rx_ring_head - priv->rx_ring_tail;
751 else
752 rx_len = RX_BUF_LEN - (priv->rx_ring_tail - rx_ring_head);
753
754 if (!rx_len)
755 return;
756
757 if (unlikely(rx_len > RX_BUF_LEN)) {
758 if (printk_ratelimit())
759 printk(KERN_ERR "%s: rx packets length > rx buffer\n",
760 dev->name);
761 return;
762 }
763
764 rx_ring_offset = (priv->rx_ring_tail - priv->rx_ring_dma_addr) % RX_BUF_LEN;
765
766 while (rx_len) {
767 u32 rx_status;
768 unsigned rx_size, rx_size_align, pkt_size;
769 struct sk_buff *skb;
770
771 rx_status = le32_to_cpup((__le32 *)(rx_ring + rx_ring_offset));
772 rmb();
773
774 rx_size = rx_status >> 20;
775 rx_size_align = (rx_size + 3) & ~3; // for 4 bytes aligned
776 pkt_size = rx_size - 4; // Omit the four octet CRC from the length.
777
778 rx_ring_offset = (rx_ring_offset + 4) % RX_BUF_LEN;
779
780 if (unlikely(rx_status == 0
781 || rx_size > (MAX_ETH_FRAME_SIZE + 4)
782 || rx_size < 16
783 || !(rx_status & RxStatesOK))) {
9c28eaea 784 _sc92031_rx_tasklet_error(dev, rx_status, rx_size);
bf345707
CEB		 785 break;
786 }
787
788 if (unlikely(rx_size_align + 4 > rx_len)) {
789 if (printk_ratelimit())
790 printk(KERN_ERR "%s: rx_len is too small\n", dev->name);
791 break;
792 }
793
794 rx_len -= rx_size_align + 4;
795
2723b019 796 skb = netdev_alloc_skb(dev, pkt_size + NET_IP_ALIGN);
bf345707
CEB		 797 if (unlikely(!skb)) {
798 if (printk_ratelimit())
799 printk(KERN_ERR "%s: Couldn't allocate a skb_buff for a packet of size %u\n",
800 dev->name, pkt_size);
801 goto next;
802 }
803
804 skb_reserve(skb, NET_IP_ALIGN);
805
806 if ((rx_ring_offset + pkt_size) > RX_BUF_LEN) {
807 memcpy(skb_put(skb, RX_BUF_LEN - rx_ring_offset),
808 rx_ring + rx_ring_offset, RX_BUF_LEN - rx_ring_offset);
809 memcpy(skb_put(skb, pkt_size - (RX_BUF_LEN - rx_ring_offset)),
810 rx_ring, pkt_size - (RX_BUF_LEN - rx_ring_offset));
811 } else {
812 memcpy(skb_put(skb, pkt_size), rx_ring + rx_ring_offset, pkt_size);
813 }
814
bf345707 815 skb->protocol = eth_type_trans(skb, dev);
bf345707
CEB		 816 netif_rx(skb);
817
9c28eaea
SH		 818 dev->stats.rx_bytes += pkt_size;
819 dev->stats.rx_packets++;
bf345707
CEB		 820
821 if (rx_status & Rx_Multicast)
9c28eaea 822 dev->stats.multicast++;
bf345707
CEB		 823
824 next:
825 rx_ring_offset = (rx_ring_offset + rx_size_align) % RX_BUF_LEN;
826 }
827 mb();
828
829 priv->rx_ring_tail = rx_ring_head;
830 iowrite32(priv->rx_ring_tail, port_base + RxBufRPtr);
831}
832
833static void _sc92031_link_tasklet(struct net_device *dev)
834{
bf345707
CEB		 835 if (_sc92031_check_media(dev))
836 netif_wake_queue(dev);
837 else {
838 netif_stop_queue(dev);
9c28eaea 839 dev->stats.tx_carrier_errors++;
bf345707
CEB		 840 }
841}
842
843static void sc92031_tasklet(unsigned long data)
844{
845 struct net_device *dev = (struct net_device *)data;
846 struct sc92031_priv *priv = netdev_priv(dev);
847 void __iomem *port_base = priv->port_base;
848 u32 intr_status, intr_mask;
849
850 intr_status = priv->intr_status;
851
852 spin_lock(&priv->lock);
853
854 if (unlikely(!netif_running(dev)))
855 goto out;
856
857 if (intr_status & TxOK)
858 _sc92031_tx_tasklet(dev);
859
860 if (intr_status & RxOK)
861 _sc92031_rx_tasklet(dev);
862
863 if (intr_status & RxOverflow)
9c28eaea 864 dev->stats.rx_errors++;
bf345707
CEB		 865
866 if (intr_status & TimeOut) {
9c28eaea
SH		 867 dev->stats.rx_errors++;
868 dev->stats.rx_length_errors++;
bf345707
CEB		 869 }
870
871 if (intr_status & (LinkFail | LinkOK))
872 _sc92031_link_tasklet(dev);
873
874out:
875 intr_mask = atomic_read(&priv->intr_mask);
876 rmb();
877
878 iowrite32(intr_mask, port_base + IntrMask);
879 mmiowb();
880
881 spin_unlock(&priv->lock);
882}
883
884static irqreturn_t sc92031_interrupt(int irq, void *dev_id)
885{
886 struct net_device *dev = dev_id;
887 struct sc92031_priv *priv = netdev_priv(dev);
888 void __iomem *port_base = priv->port_base;
889 u32 intr_status, intr_mask;
890
891 /* mask interrupts before clearing IntrStatus */
892 iowrite32(0, port_base + IntrMask);
893 _sc92031_dummy_read(port_base);
894
895 intr_status = ioread32(port_base + IntrStatus);
896 if (unlikely(intr_status == 0xffffffff))
897 return IRQ_NONE; // hardware has gone missing
898
899 intr_status &= IntrBits;
900 if (!intr_status)
901 goto out_none;
902
903 priv->intr_status = intr_status;
904 tasklet_schedule(&priv->tasklet);
905
906 return IRQ_HANDLED;
907
908out_none:
909 intr_mask = atomic_read(&priv->intr_mask);
910 rmb();
911
912 iowrite32(intr_mask, port_base + IntrMask);
913 mmiowb();
914
915 return IRQ_NONE;
916}
917
918static struct net_device_stats *sc92031_get_stats(struct net_device *dev)
919{
920 struct sc92031_priv *priv = netdev_priv(dev);
921 void __iomem *port_base = priv->port_base;
922
923 // FIXME I do not understand what is this trying to do.
924 if (netif_running(dev)) {
925 int temp;
926
927 spin_lock_bh(&priv->lock);
928
929 /* Update the error count. */
930 temp = (ioread32(port_base + RxStatus0) >> 16) & 0xffff;
931
932 if (temp == 0xffff) {
933 priv->rx_value += temp;
9c28eaea
SH		 934 dev->stats.rx_fifo_errors = priv->rx_value;
935 } else
936 dev->stats.rx_fifo_errors = temp + priv->rx_value;
bf345707
CEB		 937
938 spin_unlock_bh(&priv->lock);
939 }
940
9c28eaea 941 return &dev->stats;
bf345707
CEB		 942}
943
944static int sc92031_start_xmit(struct sk_buff *skb, struct net_device *dev)
945{
bf345707
CEB		 946 struct sc92031_priv *priv = netdev_priv(dev);
947 void __iomem *port_base = priv->port_base;
bf345707
CEB		 948 unsigned len;
949 unsigned entry;
950 u32 tx_status;
951
952 if (unlikely(skb->len > TX_BUF_SIZE)) {
9c28eaea 953 dev->stats.tx_dropped++;
bf345707
CEB		 954 goto out;
955 }
956
699784b7 957 spin_lock(&priv->lock);
bf345707
CEB		 958
959 if (unlikely(!netif_carrier_ok(dev))) {
9c28eaea 960 dev->stats.tx_dropped++;
bf345707
CEB		 961 goto out_unlock;
962 }
963
964 BUG_ON(priv->tx_head - priv->tx_tail >= NUM_TX_DESC);
965
966 entry = priv->tx_head++ % NUM_TX_DESC;
967
968 skb_copy_and_csum_dev(skb, priv->tx_bufs + entry * TX_BUF_SIZE);
969
970 len = skb->len;
6f94f709 971 if (len < ETH_ZLEN) {
5a0a92e6
GR		 972 memset(priv->tx_bufs + entry * TX_BUF_SIZE + len,
973 0, ETH_ZLEN - len);
974 len = ETH_ZLEN;
975 }
bf345707
CEB		 976
977 wmb();
978
979 if (len < 100)
980 tx_status = len;
981 else if (len < 300)
982 tx_status = 0x30000 | len;
983 else
984 tx_status = 0x50000 | len;
985
986 iowrite32(priv->tx_bufs_dma_addr + entry * TX_BUF_SIZE,
987 port_base + TxAddr0 + entry * 4);
988 iowrite32(tx_status, port_base + TxStatus0 + entry * 4);
989 mmiowb();
990
991 dev->trans_start = jiffies;
992
993 if (priv->tx_head - priv->tx_tail >= NUM_TX_DESC)
994 netif_stop_queue(dev);
995
996out_unlock:
699784b7 997 spin_unlock(&priv->lock);
bf345707
CEB		 998
999out:
1000 dev_kfree_skb(skb);
1001
26a17b7b 1002 return NETDEV_TX_OK;
bf345707
CEB		 1003}
1004
1005static int sc92031_open(struct net_device *dev)
1006{
1007 int err;
1008 struct sc92031_priv *priv = netdev_priv(dev);
1009 struct pci_dev *pdev = priv->pdev;
1010
1011 priv->rx_ring = pci_alloc_consistent(pdev, RX_BUF_LEN,
1012 &priv->rx_ring_dma_addr);
1013 if (unlikely(!priv->rx_ring)) {
1014 err = -ENOMEM;
1015 goto out_alloc_rx_ring;
1016 }
1017
1018 priv->tx_bufs = pci_alloc_consistent(pdev, TX_BUF_TOT_LEN,
1019 &priv->tx_bufs_dma_addr);
1020 if (unlikely(!priv->tx_bufs)) {
1021 err = -ENOMEM;
1022 goto out_alloc_tx_bufs;
1023 }
1024 priv->tx_head = priv->tx_tail = 0;
1025
1026 err = request_irq(pdev->irq, sc92031_interrupt,
2db6346f 1027 IRQF_SHARED, dev->name, dev);
bf345707
CEB		 1028 if (unlikely(err < 0))
1029 goto out_request_irq;
1030
1031 priv->pm_config = 0;
1032
1033 /* Interrupts already disabled by sc92031_stop or sc92031_probe */
699784b7 1034 spin_lock_bh(&priv->lock);
bf345707
CEB		 1035
1036 _sc92031_reset(dev);
1037 mmiowb();
1038
699784b7 1039 spin_unlock_bh(&priv->lock);
bf345707
CEB		 1040 sc92031_enable_interrupts(dev);
1041
1042 if (netif_carrier_ok(dev))
1043 netif_start_queue(dev);
1044 else
1045 netif_tx_disable(dev);
1046
1047 return 0;
1048
1049out_request_irq:
1050 pci_free_consistent(pdev, TX_BUF_TOT_LEN, priv->tx_bufs,
1051 priv->tx_bufs_dma_addr);
1052out_alloc_tx_bufs:
1053 pci_free_consistent(pdev, RX_BUF_LEN, priv->rx_ring,
1054 priv->rx_ring_dma_addr);
1055out_alloc_rx_ring:
1056 return err;
1057}
1058
1059static int sc92031_stop(struct net_device *dev)
1060{
1061 struct sc92031_priv *priv = netdev_priv(dev);
1062 struct pci_dev *pdev = priv->pdev;
1063
1064 netif_tx_disable(dev);
1065
1066 /* Disable interrupts, stop Tx and Rx. */
1067 sc92031_disable_interrupts(dev);
1068
699784b7 1069 spin_lock_bh(&priv->lock);
bf345707
CEB		 1070
1071 _sc92031_disable_tx_rx(dev);
1072 _sc92031_tx_clear(dev);
1073 mmiowb();
1074
699784b7 1075 spin_unlock_bh(&priv->lock);
bf345707
CEB		 1076
1077 free_irq(pdev->irq, dev);
1078 pci_free_consistent(pdev, TX_BUF_TOT_LEN, priv->tx_bufs,
1079 priv->tx_bufs_dma_addr);
1080 pci_free_consistent(pdev, RX_BUF_LEN, priv->rx_ring,
1081 priv->rx_ring_dma_addr);
1082
1083 return 0;
1084}
1085
1086static void sc92031_set_multicast_list(struct net_device *dev)
1087{
1088 struct sc92031_priv *priv = netdev_priv(dev);
1089
1090 spin_lock_bh(&priv->lock);
1091
1092 _sc92031_set_mar(dev);
1093 _sc92031_set_rx_config(dev);
1094 mmiowb();
1095
1096 spin_unlock_bh(&priv->lock);
1097}
1098
1099static void sc92031_tx_timeout(struct net_device *dev)
1100{
1101 struct sc92031_priv *priv = netdev_priv(dev);
1102
1103 /* Disable interrupts by clearing the interrupt mask.*/
1104 sc92031_disable_interrupts(dev);
1105
1106 spin_lock(&priv->lock);
1107
1108 priv->tx_timeouts++;
1109
1110 _sc92031_reset(dev);
1111 mmiowb();
1112
1113 spin_unlock(&priv->lock);
1114
1115 /* enable interrupts */
1116 sc92031_enable_interrupts(dev);
1117
1118 if (netif_carrier_ok(dev))
1119 netif_wake_queue(dev);
1120}
1121
1122#ifdef CONFIG_NET_POLL_CONTROLLER
1123static void sc92031_poll_controller(struct net_device *dev)
1124{
1125 disable_irq(dev->irq);
1126 if (sc92031_interrupt(dev->irq, dev) != IRQ_NONE)
1127 sc92031_tasklet((unsigned long)dev);
1128 enable_irq(dev->irq);
1129}
1130#endif
1131
1132static int sc92031_ethtool_get_settings(struct net_device *dev,
1133 struct ethtool_cmd *cmd)
1134{
1135 struct sc92031_priv *priv = netdev_priv(dev);
1136 void __iomem *port_base = priv->port_base;
1137 u8 phy_address;
1138 u32 phy_ctrl;
1139 u16 output_status;
1140
1141 spin_lock_bh(&priv->lock);
1142
1143 phy_address = ioread32(port_base + Miicmd1) >> 27;
1144 phy_ctrl = ioread32(port_base + PhyCtrl);
1145
1146 output_status = _sc92031_mii_read(port_base, MII_OutputStatus);
1147 _sc92031_mii_scan(port_base);
1148 mmiowb();
1149
1150 spin_unlock_bh(&priv->lock);
1151
1152 cmd->supported = SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full
1153 | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full
1154 | SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII;
1155
1156 cmd->advertising = ADVERTISED_TP | ADVERTISED_MII;
1157
1158 if ((phy_ctrl & (PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10))
1159 == (PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10))
1160 cmd->advertising |= ADVERTISED_Autoneg;
1161
1162 if ((phy_ctrl & PhyCtrlSpd10) == PhyCtrlSpd10)
1163 cmd->advertising |= ADVERTISED_10baseT_Half;
1164
1165 if ((phy_ctrl & (PhyCtrlSpd10 | PhyCtrlDux))
1166 == (PhyCtrlSpd10 | PhyCtrlDux))
1167 cmd->advertising |= ADVERTISED_10baseT_Full;
1168
1169 if ((phy_ctrl & PhyCtrlSpd100) == PhyCtrlSpd100)
1170 cmd->advertising |= ADVERTISED_100baseT_Half;
1171
1172 if ((phy_ctrl & (PhyCtrlSpd100 | PhyCtrlDux))
1173 == (PhyCtrlSpd100 | PhyCtrlDux))
1174 cmd->advertising |= ADVERTISED_100baseT_Full;
1175
1176 if (phy_ctrl & PhyCtrlAne)
1177 cmd->advertising |= ADVERTISED_Autoneg;
1178
1179 cmd->speed = (output_status & 0x2) ? SPEED_100 : SPEED_10;
1180 cmd->duplex = (output_status & 0x4) ? DUPLEX_FULL : DUPLEX_HALF;
1181 cmd->port = PORT_MII;
1182 cmd->phy_address = phy_address;
1183 cmd->transceiver = XCVR_INTERNAL;
1184 cmd->autoneg = (phy_ctrl & PhyCtrlAne) ? AUTONEG_ENABLE : AUTONEG_DISABLE;
1185
1186 return 0;
1187}
1188
1189static int sc92031_ethtool_set_settings(struct net_device *dev,
1190 struct ethtool_cmd *cmd)
1191{
1192 struct sc92031_priv *priv = netdev_priv(dev);
1193 void __iomem *port_base = priv->port_base;
1194 u32 phy_ctrl;
1195 u32 old_phy_ctrl;
1196
1197 if (!(cmd->speed == SPEED_10 || cmd->speed == SPEED_100))
1198 return -EINVAL;
1199 if (!(cmd->duplex == DUPLEX_HALF || cmd->duplex == DUPLEX_FULL))
1200 return -EINVAL;
1201 if (!(cmd->port == PORT_MII))
1202 return -EINVAL;
1203 if (!(cmd->phy_address == 0x1f))
1204 return -EINVAL;
1205 if (!(cmd->transceiver == XCVR_INTERNAL))
1206 return -EINVAL;
1207 if (!(cmd->autoneg == AUTONEG_DISABLE || cmd->autoneg == AUTONEG_ENABLE))
1208 return -EINVAL;
1209
1210 if (cmd->autoneg == AUTONEG_ENABLE) {
1211 if (!(cmd->advertising & (ADVERTISED_Autoneg
1212 | ADVERTISED_100baseT_Full
1213 | ADVERTISED_100baseT_Half
1214 | ADVERTISED_10baseT_Full
1215 | ADVERTISED_10baseT_Half)))
1216 return -EINVAL;
1217
1218 phy_ctrl = PhyCtrlAne;
1219
1220 // FIXME: I'm not sure what the original code was trying to do
1221 if (cmd->advertising & ADVERTISED_Autoneg)
1222 phy_ctrl |= PhyCtrlDux | PhyCtrlSpd100 | PhyCtrlSpd10;
1223 if (cmd->advertising & ADVERTISED_100baseT_Full)
1224 phy_ctrl |= PhyCtrlDux | PhyCtrlSpd100;
1225 if (cmd->advertising & ADVERTISED_100baseT_Half)
1226 phy_ctrl |= PhyCtrlSpd100;
1227 if (cmd->advertising & ADVERTISED_10baseT_Full)
1228 phy_ctrl |= PhyCtrlSpd10 | PhyCtrlDux;
1229 if (cmd->advertising & ADVERTISED_10baseT_Half)
1230 phy_ctrl |= PhyCtrlSpd10;
1231 } else {
1232 // FIXME: Whole branch guessed
1233 phy_ctrl = 0;
1234
1235 if (cmd->speed == SPEED_10)
1236 phy_ctrl |= PhyCtrlSpd10;
1237 else /* cmd->speed == SPEED_100 */
1238 phy_ctrl |= PhyCtrlSpd100;
1239
1240 if (cmd->duplex == DUPLEX_FULL)
1241 phy_ctrl |= PhyCtrlDux;
1242 }
1243
1244 spin_lock_bh(&priv->lock);
1245
1246 old_phy_ctrl = ioread32(port_base + PhyCtrl);
1247 phy_ctrl |= old_phy_ctrl & ~(PhyCtrlAne | PhyCtrlDux
1248 | PhyCtrlSpd100 | PhyCtrlSpd10);
1249 if (phy_ctrl != old_phy_ctrl)
1250 iowrite32(phy_ctrl, port_base + PhyCtrl);
1251
1252 spin_unlock_bh(&priv->lock);
1253
1254 return 0;
1255}
1256
1257static void sc92031_ethtool_get_drvinfo(struct net_device *dev,
1258 struct ethtool_drvinfo *drvinfo)
1259{
1260 struct sc92031_priv *priv = netdev_priv(dev);
1261 struct pci_dev *pdev = priv->pdev;
1262
1263 strcpy(drvinfo->driver, SC92031_NAME);
bf345707
CEB		 1264 strcpy(drvinfo->bus_info, pci_name(pdev));
1265}
1266
1267static void sc92031_ethtool_get_wol(struct net_device *dev,
1268 struct ethtool_wolinfo *wolinfo)
1269{
1270 struct sc92031_priv *priv = netdev_priv(dev);
1271 void __iomem *port_base = priv->port_base;
1272 u32 pm_config;
1273
1274 spin_lock_bh(&priv->lock);
1275 pm_config = ioread32(port_base + PMConfig);
1276 spin_unlock_bh(&priv->lock);
1277
1278 // FIXME: Guessed
1279 wolinfo->supported = WAKE_PHY | WAKE_MAGIC
1280 | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST;
1281 wolinfo->wolopts = 0;
1282
1283 if (pm_config & PM_LinkUp)
1284 wolinfo->wolopts |= WAKE_PHY;
1285
1286 if (pm_config & PM_Magic)
1287 wolinfo->wolopts |= WAKE_MAGIC;
1288
1289 if (pm_config & PM_WakeUp)
1290 // FIXME: Guessed
1291 wolinfo->wolopts |= WAKE_UCAST | WAKE_MCAST | WAKE_BCAST;
1292}
1293
1294static int sc92031_ethtool_set_wol(struct net_device *dev,
1295 struct ethtool_wolinfo *wolinfo)
1296{
1297 struct sc92031_priv *priv = netdev_priv(dev);
1298 void __iomem *port_base = priv->port_base;
1299 u32 pm_config;
1300
1301 spin_lock_bh(&priv->lock);
1302
1303 pm_config = ioread32(port_base + PMConfig)
1304 & ~(PM_LinkUp | PM_Magic | PM_WakeUp);
1305
1306 if (wolinfo->wolopts & WAKE_PHY)
1307 pm_config |= PM_LinkUp;
1308
1309 if (wolinfo->wolopts & WAKE_MAGIC)
1310 pm_config |= PM_Magic;
1311
1312 // FIXME: Guessed
1313 if (wolinfo->wolopts & (WAKE_UCAST | WAKE_MCAST | WAKE_BCAST))
1314 pm_config |= PM_WakeUp;
1315
1316 priv->pm_config = pm_config;
1317 iowrite32(pm_config, port_base + PMConfig);
1318 mmiowb();
1319
1320 spin_unlock_bh(&priv->lock);
1321
1322 return 0;
1323}
1324
1325static int sc92031_ethtool_nway_reset(struct net_device *dev)
1326{
1327 int err = 0;
1328 struct sc92031_priv *priv = netdev_priv(dev);
1329 void __iomem *port_base = priv->port_base;
1330 u16 bmcr;
1331
1332 spin_lock_bh(&priv->lock);
1333
1334 bmcr = _sc92031_mii_read(port_base, MII_BMCR);
1335 if (!(bmcr & BMCR_ANENABLE)) {
1336 err = -EINVAL;
1337 goto out;
1338 }
1339
1340 _sc92031_mii_write(port_base, MII_BMCR, bmcr | BMCR_ANRESTART);
1341
1342out:
1343 _sc92031_mii_scan(port_base);
1344 mmiowb();
1345
1346 spin_unlock_bh(&priv->lock);
1347
1348 return err;
1349}
1350
1351static const char sc92031_ethtool_stats_strings[SILAN_STATS_NUM][ETH_GSTRING_LEN] = {
1352 "tx_timeout",
1353 "rx_loss",
1354};
1355
1356static void sc92031_ethtool_get_strings(struct net_device *dev,
1357 u32 stringset, u8 *data)
1358{
1359 if (stringset == ETH_SS_STATS)
1360 memcpy(data, sc92031_ethtool_stats_strings,
1361 SILAN_STATS_NUM * ETH_GSTRING_LEN);
1362}
1363
b9f2c044 1364static int sc92031_ethtool_get_sset_count(struct net_device *dev, int sset)
bf345707 1365{
b9f2c044
JG		 1366 switch (sset) {
1367 case ETH_SS_STATS:
1368 return SILAN_STATS_NUM;
1369 default:
1370 return -EOPNOTSUPP;
1371 }
bf345707
CEB		 1372}
1373
1374static void sc92031_ethtool_get_ethtool_stats(struct net_device *dev,
1375 struct ethtool_stats *stats, u64 *data)
1376{
1377 struct sc92031_priv *priv = netdev_priv(dev);
1378
1379 spin_lock_bh(&priv->lock);
1380 data[0] = priv->tx_timeouts;
1381 data[1] = priv->rx_loss;
1382 spin_unlock_bh(&priv->lock);
1383}
1384
974acda0 1385static const struct ethtool_ops sc92031_ethtool_ops = {
bf345707
CEB		 1386 .get_settings = sc92031_ethtool_get_settings,
1387 .set_settings = sc92031_ethtool_set_settings,
1388 .get_drvinfo = sc92031_ethtool_get_drvinfo,
1389 .get_wol = sc92031_ethtool_get_wol,
1390 .set_wol = sc92031_ethtool_set_wol,
1391 .nway_reset = sc92031_ethtool_nway_reset,
1392 .get_link = ethtool_op_get_link,
bf345707 1393 .get_strings = sc92031_ethtool_get_strings,
b9f2c044 1394 .get_sset_count = sc92031_ethtool_get_sset_count,
bf345707 1395 .get_ethtool_stats = sc92031_ethtool_get_ethtool_stats,
bf345707
CEB		 1396};
1397
974acda0
SH		 1398
1399static const struct net_device_ops sc92031_netdev_ops = {
1400 .ndo_get_stats = sc92031_get_stats,
1401 .ndo_start_xmit = sc92031_start_xmit,
1402 .ndo_open = sc92031_open,
1403 .ndo_stop = sc92031_stop,
1404 .ndo_set_multicast_list = sc92031_set_multicast_list,
1405 .ndo_change_mtu = eth_change_mtu,
1406 .ndo_validate_addr = eth_validate_addr,
fe96aaa1 1407 .ndo_set_mac_address = eth_mac_addr,
974acda0
SH		 1408 .ndo_tx_timeout = sc92031_tx_timeout,
1409#ifdef CONFIG_NET_POLL_CONTROLLER
1410 .ndo_poll_controller = sc92031_poll_controller,
1411#endif
1412};
1413
bf345707
CEB		 1414static int __devinit sc92031_probe(struct pci_dev *pdev,
1415 const struct pci_device_id *id)
1416{
1417 int err;
1418 void __iomem* port_base;
1419 struct net_device *dev;
1420 struct sc92031_priv *priv;
1421 u32 mac0, mac1;
eb5c8bc1 1422 unsigned long base_addr;
bf345707
CEB		 1423
1424 err = pci_enable_device(pdev);
1425 if (unlikely(err < 0))
1426 goto out_enable_device;
1427
1428 pci_set_master(pdev);
1429
284901a9 1430 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
bf345707
CEB		 1431 if (unlikely(err < 0))
1432 goto out_set_dma_mask;
1433
284901a9 1434 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
bf345707
CEB		 1435 if (unlikely(err < 0))
1436 goto out_set_dma_mask;
1437
1438 err = pci_request_regions(pdev, SC92031_NAME);
1439 if (unlikely(err < 0))
1440 goto out_request_regions;
1441
1442 port_base = pci_iomap(pdev, SC92031_USE_BAR, 0);
1443 if (unlikely(!port_base)) {
1444 err = -EIO;
1445 goto out_iomap;
1446 }
1447
1448 dev = alloc_etherdev(sizeof(struct sc92031_priv));
1449 if (unlikely(!dev)) {
1450 err = -ENOMEM;
1451 goto out_alloc_etherdev;
1452 }
1453
1454 pci_set_drvdata(pdev, dev);
5a81f143 1455 SET_NETDEV_DEV(dev, &pdev->dev);
bf345707
CEB		 1456
1457#if SC92031_USE_BAR == 0
1458 dev->mem_start = pci_resource_start(pdev, SC92031_USE_BAR);
1459 dev->mem_end = pci_resource_end(pdev, SC92031_USE_BAR);
1460#elif SC92031_USE_BAR == 1
1461 dev->base_addr = pci_resource_start(pdev, SC92031_USE_BAR);
1462#endif
1463 dev->irq = pdev->irq;
1464
1465 /* faked with skb_copy_and_csum_dev */
1466 dev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA;
1467
974acda0 1468 dev->netdev_ops = &sc92031_netdev_ops;
bf345707 1469 dev->watchdog_timeo = TX_TIMEOUT;
974acda0 1470 dev->ethtool_ops = &sc92031_ethtool_ops;
bf345707
CEB		 1471
1472 priv = netdev_priv(dev);
1473 spin_lock_init(&priv->lock);
1474 priv->port_base = port_base;
1475 priv->pdev = pdev;
1476 tasklet_init(&priv->tasklet, sc92031_tasklet, (unsigned long)dev);
1477 /* Fudge tasklet count so the call to sc92031_enable_interrupts at
1478 * sc92031_open will work correctly */
1479 tasklet_disable_nosync(&priv->tasklet);
1480
1481 /* PCI PM Wakeup */
1482 iowrite32((~PM_LongWF & ~PM_LWPTN) | PM_Enable, port_base + PMConfig);
1483
1484 mac0 = ioread32(port_base + MAC0);
1485 mac1 = ioread32(port_base + MAC0 + 4);
1486 dev->dev_addr[0] = dev->perm_addr[0] = mac0 >> 24;
1487 dev->dev_addr[1] = dev->perm_addr[1] = mac0 >> 16;
1488 dev->dev_addr[2] = dev->perm_addr[2] = mac0 >> 8;
1489 dev->dev_addr[3] = dev->perm_addr[3] = mac0;
1490 dev->dev_addr[4] = dev->perm_addr[4] = mac1 >> 8;
1491 dev->dev_addr[5] = dev->perm_addr[5] = mac1;
1492
1493 err = register_netdev(dev);
1494 if (err < 0)
1495 goto out_register_netdev;
1496
eb5c8bc1
CEB		 1497#if SC92031_USE_BAR == 0
1498 base_addr = dev->mem_start;
1499#elif SC92031_USE_BAR == 1
1500 base_addr = dev->base_addr;
1501#endif
1502 printk(KERN_INFO "%s: SC92031 at 0x%lx, %pM, IRQ %d\n", dev->name,
1503 base_addr, dev->dev_addr, dev->irq);
1504
bf345707
CEB		 1505 return 0;
1506
1507out_register_netdev:
1508 free_netdev(dev);
1509out_alloc_etherdev:
1510 pci_iounmap(pdev, port_base);
1511out_iomap:
1512 pci_release_regions(pdev);
1513out_request_regions:
1514out_set_dma_mask:
1515 pci_disable_device(pdev);
1516out_enable_device:
1517 return err;
1518}
1519
1520static void __devexit sc92031_remove(struct pci_dev *pdev)
1521{
1522 struct net_device *dev = pci_get_drvdata(pdev);
1523 struct sc92031_priv *priv = netdev_priv(dev);
1524 void __iomem* port_base = priv->port_base;
1525
1526 unregister_netdev(dev);
1527 free_netdev(dev);
1528 pci_iounmap(pdev, port_base);
1529 pci_release_regions(pdev);
1530 pci_disable_device(pdev);
1531}
1532
1533static int sc92031_suspend(struct pci_dev *pdev, pm_message_t state)
1534{
1535 struct net_device *dev = pci_get_drvdata(pdev);
1536 struct sc92031_priv *priv = netdev_priv(dev);
1537
1538 pci_save_state(pdev);
1539
1540 if (!netif_running(dev))
1541 goto out;
1542
1543 netif_device_detach(dev);
1544
1545 /* Disable interrupts, stop Tx and Rx. */
1546 sc92031_disable_interrupts(dev);
1547
699784b7 1548 spin_lock_bh(&priv->lock);
bf345707
CEB		 1549
1550 _sc92031_disable_tx_rx(dev);
1551 _sc92031_tx_clear(dev);
1552 mmiowb();
1553
699784b7 1554 spin_unlock_bh(&priv->lock);
bf345707
CEB		 1555
1556out:
1557 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1558
1559 return 0;
1560}
1561
1562static int sc92031_resume(struct pci_dev *pdev)
1563{
1564 struct net_device *dev = pci_get_drvdata(pdev);
1565 struct sc92031_priv *priv = netdev_priv(dev);
1566
1567 pci_restore_state(pdev);
1568 pci_set_power_state(pdev, PCI_D0);
1569
1570 if (!netif_running(dev))
1571 goto out;
1572
1573 /* Interrupts already disabled by sc92031_suspend */
699784b7 1574 spin_lock_bh(&priv->lock);
bf345707
CEB		 1575
1576 _sc92031_reset(dev);
1577 mmiowb();
1578
699784b7 1579 spin_unlock_bh(&priv->lock);
bf345707
CEB		 1580 sc92031_enable_interrupts(dev);
1581
1582 netif_device_attach(dev);
1583
1584 if (netif_carrier_ok(dev))
1585 netif_wake_queue(dev);
1586 else
1587 netif_tx_disable(dev);
1588
1589out:
1590 return 0;
1591}
1592
1593static struct pci_device_id sc92031_pci_device_id_table[] __devinitdata = {
5ec99fdf
CEB		 1594 { PCI_DEVICE(PCI_VENDOR_ID_SILAN, 0x2031) },
1595 { PCI_DEVICE(PCI_VENDOR_ID_SILAN, 0x8139) },
bf345707
CEB		 1596 { 0, }
1597};
1598MODULE_DEVICE_TABLE(pci, sc92031_pci_device_id_table);
1599
1600static struct pci_driver sc92031_pci_driver = {
1601 .name = SC92031_NAME,
1602 .id_table = sc92031_pci_device_id_table,
1603 .probe = sc92031_probe,
1604 .remove = __devexit_p(sc92031_remove),
1605 .suspend = sc92031_suspend,
1606 .resume = sc92031_resume,
1607};
1608
1609static int __init sc92031_init(void)
1610{
bf345707
CEB		 1611 return pci_register_driver(&sc92031_pci_driver);
1612}
1613
1614static void __exit sc92031_exit(void)
1615{
1616 pci_unregister_driver(&sc92031_pci_driver);
1617}
1618
1619module_init(sc92031_init);
1620module_exit(sc92031_exit);
1621
1622MODULE_LICENSE("GPL");
1623MODULE_AUTHOR("Cesar Eduardo Barros <cesarb@cesarb.net>");
f08d7c36 1624MODULE_DESCRIPTION("Silan SC92031 PCI Fast Ethernet Adapter driver");
Linux 6.x block layer and io_uring tree(s)