1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright(c) 2006 - 2007 Atheros Corporation. All rights reserved.
4  * Copyright(c) 2007 - 2008 Chris Snook <csnook@redhat.com>
5  *
6  * Derived from Intel e1000 driver
7  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
8  */
9 
10 #include <linux/atomic.h>
11 #include <linux/crc32.h>
12 #include <linux/dma-mapping.h>
13 #include <linux/etherdevice.h>
14 #include <linux/ethtool.h>
15 #include <linux/hardirq.h>
16 #include <linux/if_vlan.h>
17 #include <linux/in.h>
18 #include <linux/interrupt.h>
19 #include <linux/ip.h>
20 #include <linux/irqflags.h>
21 #include <linux/irqreturn.h>
22 #include <linux/mii.h>
23 #include <linux/net.h>
24 #include <linux/netdevice.h>
25 #include <linux/pci.h>
26 #include <linux/pci_ids.h>
27 #include <linux/pm.h>
28 #include <linux/skbuff.h>
29 #include <linux/slab.h>
30 #include <linux/spinlock.h>
31 #include <linux/string.h>
32 #include <linux/tcp.h>
33 #include <linux/timer.h>
34 #include <linux/types.h>
35 #include <linux/workqueue.h>
36 
37 #include "atl2.h"
38 
39 static const char atl2_driver_name[] = "atl2";
40 static const struct ethtool_ops atl2_ethtool_ops;
41 
42 MODULE_AUTHOR("Atheros Corporation <xiong.huang@atheros.com>, Chris Snook <csnook@redhat.com>");
43 MODULE_DESCRIPTION("Atheros Fast Ethernet Network Driver");
44 MODULE_LICENSE("GPL");
45 
46 /*
47  * atl2_pci_tbl - PCI Device ID Table
48  */
49 static const struct pci_device_id atl2_pci_tbl[] = {
50 	{PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L2)},
51 	/* required last entry */
52 	{0,}
53 };
54 MODULE_DEVICE_TABLE(pci, atl2_pci_tbl);
55 
56 static void atl2_check_options(struct atl2_adapter *adapter);
57 
58 /**
59  * atl2_sw_init - Initialize general software structures (struct atl2_adapter)
60  * @adapter: board private structure to initialize
61  *
62  * atl2_sw_init initializes the Adapter private data structure.
63  * Fields are initialized based on PCI device information and
64  * OS network device settings (MTU size).
65  */
66 static int atl2_sw_init(struct atl2_adapter *adapter)
67 {
68 	struct atl2_hw *hw = &adapter->hw;
69 	struct pci_dev *pdev = adapter->pdev;
70 
71 	/* PCI config space info */
72 	hw->vendor_id = pdev->vendor;
73 	hw->device_id = pdev->device;
74 	hw->subsystem_vendor_id = pdev->subsystem_vendor;
75 	hw->subsystem_id = pdev->subsystem_device;
76 	hw->revision_id  = pdev->revision;
77 
78 	pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
79 
80 	adapter->wol = 0;
81 	adapter->ict = 50000;  /* ~100ms */
82 	adapter->link_speed = SPEED_0;   /* hardware init */
83 	adapter->link_duplex = FULL_DUPLEX;
84 
85 	hw->phy_configured = false;
86 	hw->preamble_len = 7;
87 	hw->ipgt = 0x60;
88 	hw->min_ifg = 0x50;
89 	hw->ipgr1 = 0x40;
90 	hw->ipgr2 = 0x60;
91 	hw->retry_buf = 2;
92 	hw->max_retry = 0xf;
93 	hw->lcol = 0x37;
94 	hw->jam_ipg = 7;
95 	hw->fc_rxd_hi = 0;
96 	hw->fc_rxd_lo = 0;
97 	hw->max_frame_size = adapter->netdev->mtu;
98 
99 	spin_lock_init(&adapter->stats_lock);
100 
101 	set_bit(__ATL2_DOWN, &adapter->flags);
102 
103 	return 0;
104 }
105 
106 /**
107  * atl2_set_multi - Multicast and Promiscuous mode set
108  * @netdev: network interface device structure
109  *
110  * The set_multi entry point is called whenever the multicast address
111  * list or the network interface flags are updated.  This routine is
112  * responsible for configuring the hardware for proper multicast,
113  * promiscuous mode, and all-multi behavior.
114  */
115 static void atl2_set_multi(struct net_device *netdev)
116 {
117 	struct atl2_adapter *adapter = netdev_priv(netdev);
118 	struct atl2_hw *hw = &adapter->hw;
119 	struct netdev_hw_addr *ha;
120 	u32 rctl;
121 	u32 hash_value;
122 
123 	/* Check for Promiscuous and All Multicast modes */
124 	rctl = ATL2_READ_REG(hw, REG_MAC_CTRL);
125 
126 	if (netdev->flags & IFF_PROMISC) {
127 		rctl |= MAC_CTRL_PROMIS_EN;
128 	} else if (netdev->flags & IFF_ALLMULTI) {
129 		rctl |= MAC_CTRL_MC_ALL_EN;
130 		rctl &= ~MAC_CTRL_PROMIS_EN;
131 	} else
132 		rctl &= ~(MAC_CTRL_PROMIS_EN | MAC_CTRL_MC_ALL_EN);
133 
134 	ATL2_WRITE_REG(hw, REG_MAC_CTRL, rctl);
135 
136 	/* clear the old settings from the multicast hash table */
137 	ATL2_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
138 	ATL2_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
139 
140 	/* comoute mc addresses' hash value ,and put it into hash table */
141 	netdev_for_each_mc_addr(ha, netdev) {
142 		hash_value = atl2_hash_mc_addr(hw, ha->addr);
143 		atl2_hash_set(hw, hash_value);
144 	}
145 }
146 
147 static void init_ring_ptrs(struct atl2_adapter *adapter)
148 {
149 	/* Read / Write Ptr Initialize: */
150 	adapter->txd_write_ptr = 0;
151 	atomic_set(&adapter->txd_read_ptr, 0);
152 
153 	adapter->rxd_read_ptr = 0;
154 	adapter->rxd_write_ptr = 0;
155 
156 	atomic_set(&adapter->txs_write_ptr, 0);
157 	adapter->txs_next_clear = 0;
158 }
159 
160 /**
161  * atl2_configure - Configure Transmit&Receive Unit after Reset
162  * @adapter: board private structure
163  *
164  * Configure the Tx /Rx unit of the MAC after a reset.
165  */
166 static int atl2_configure(struct atl2_adapter *adapter)
167 {
168 	struct atl2_hw *hw = &adapter->hw;
169 	u32 value;
170 
171 	/* clear interrupt status */
172 	ATL2_WRITE_REG(&adapter->hw, REG_ISR, 0xffffffff);
173 
174 	/* set MAC Address */
175 	value = (((u32)hw->mac_addr[2]) << 24) |
176 		(((u32)hw->mac_addr[3]) << 16) |
177 		(((u32)hw->mac_addr[4]) << 8) |
178 		(((u32)hw->mac_addr[5]));
179 	ATL2_WRITE_REG(hw, REG_MAC_STA_ADDR, value);
180 	value = (((u32)hw->mac_addr[0]) << 8) |
181 		(((u32)hw->mac_addr[1]));
182 	ATL2_WRITE_REG(hw, (REG_MAC_STA_ADDR+4), value);
183 
184 	/* HI base address */
185 	ATL2_WRITE_REG(hw, REG_DESC_BASE_ADDR_HI,
186 		(u32)((adapter->ring_dma & 0xffffffff00000000ULL) >> 32));
187 
188 	/* LO base address */
189 	ATL2_WRITE_REG(hw, REG_TXD_BASE_ADDR_LO,
190 		(u32)(adapter->txd_dma & 0x00000000ffffffffULL));
191 	ATL2_WRITE_REG(hw, REG_TXS_BASE_ADDR_LO,
192 		(u32)(adapter->txs_dma & 0x00000000ffffffffULL));
193 	ATL2_WRITE_REG(hw, REG_RXD_BASE_ADDR_LO,
194 		(u32)(adapter->rxd_dma & 0x00000000ffffffffULL));
195 
196 	/* element count */
197 	ATL2_WRITE_REGW(hw, REG_TXD_MEM_SIZE, (u16)(adapter->txd_ring_size/4));
198 	ATL2_WRITE_REGW(hw, REG_TXS_MEM_SIZE, (u16)adapter->txs_ring_size);
199 	ATL2_WRITE_REGW(hw, REG_RXD_BUF_NUM,  (u16)adapter->rxd_ring_size);
200 
201 	/* config Internal SRAM */
202 /*
203     ATL2_WRITE_REGW(hw, REG_SRAM_TXRAM_END, sram_tx_end);
204     ATL2_WRITE_REGW(hw, REG_SRAM_TXRAM_END, sram_rx_end);
205 */
206 
207 	/* config IPG/IFG */
208 	value = (((u32)hw->ipgt & MAC_IPG_IFG_IPGT_MASK) <<
209 		MAC_IPG_IFG_IPGT_SHIFT) |
210 		(((u32)hw->min_ifg & MAC_IPG_IFG_MIFG_MASK) <<
211 		MAC_IPG_IFG_MIFG_SHIFT) |
212 		(((u32)hw->ipgr1 & MAC_IPG_IFG_IPGR1_MASK) <<
213 		MAC_IPG_IFG_IPGR1_SHIFT)|
214 		(((u32)hw->ipgr2 & MAC_IPG_IFG_IPGR2_MASK) <<
215 		MAC_IPG_IFG_IPGR2_SHIFT);
216 	ATL2_WRITE_REG(hw, REG_MAC_IPG_IFG, value);
217 
218 	/* config  Half-Duplex Control */
219 	value = ((u32)hw->lcol & MAC_HALF_DUPLX_CTRL_LCOL_MASK) |
220 		(((u32)hw->max_retry & MAC_HALF_DUPLX_CTRL_RETRY_MASK) <<
221 		MAC_HALF_DUPLX_CTRL_RETRY_SHIFT) |
222 		MAC_HALF_DUPLX_CTRL_EXC_DEF_EN |
223 		(0xa << MAC_HALF_DUPLX_CTRL_ABEBT_SHIFT) |
224 		(((u32)hw->jam_ipg & MAC_HALF_DUPLX_CTRL_JAMIPG_MASK) <<
225 		MAC_HALF_DUPLX_CTRL_JAMIPG_SHIFT);
226 	ATL2_WRITE_REG(hw, REG_MAC_HALF_DUPLX_CTRL, value);
227 
228 	/* set Interrupt Moderator Timer */
229 	ATL2_WRITE_REGW(hw, REG_IRQ_MODU_TIMER_INIT, adapter->imt);
230 	ATL2_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_ITIMER_EN);
231 
232 	/* set Interrupt Clear Timer */
233 	ATL2_WRITE_REGW(hw, REG_CMBDISDMA_TIMER, adapter->ict);
234 
235 	/* set MTU */
236 	ATL2_WRITE_REG(hw, REG_MTU, adapter->netdev->mtu +
237 		ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
238 
239 	/* 1590 */
240 	ATL2_WRITE_REG(hw, REG_TX_CUT_THRESH, 0x177);
241 
242 	/* flow control */
243 	ATL2_WRITE_REGW(hw, REG_PAUSE_ON_TH, hw->fc_rxd_hi);
244 	ATL2_WRITE_REGW(hw, REG_PAUSE_OFF_TH, hw->fc_rxd_lo);
245 
246 	/* Init mailbox */
247 	ATL2_WRITE_REGW(hw, REG_MB_TXD_WR_IDX, (u16)adapter->txd_write_ptr);
248 	ATL2_WRITE_REGW(hw, REG_MB_RXD_RD_IDX, (u16)adapter->rxd_read_ptr);
249 
250 	/* enable DMA read/write */
251 	ATL2_WRITE_REGB(hw, REG_DMAR, DMAR_EN);
252 	ATL2_WRITE_REGB(hw, REG_DMAW, DMAW_EN);
253 
254 	value = ATL2_READ_REG(&adapter->hw, REG_ISR);
255 	if ((value & ISR_PHY_LINKDOWN) != 0)
256 		value = 1; /* config failed */
257 	else
258 		value = 0;
259 
260 	/* clear all interrupt status */
261 	ATL2_WRITE_REG(&adapter->hw, REG_ISR, 0x3fffffff);
262 	ATL2_WRITE_REG(&adapter->hw, REG_ISR, 0);
263 	return value;
264 }
265 
266 /**
267  * atl2_setup_ring_resources - allocate Tx / RX descriptor resources
268  * @adapter: board private structure
269  *
270  * Return 0 on success, negative on failure
271  */
272 static s32 atl2_setup_ring_resources(struct atl2_adapter *adapter)
273 {
274 	struct pci_dev *pdev = adapter->pdev;
275 	int size;
276 	u8 offset = 0;
277 
278 	/* real ring DMA buffer */
279 	adapter->ring_size = size =
280 		adapter->txd_ring_size * 1 + 7 +	/* dword align */
281 		adapter->txs_ring_size * 4 + 7 +	/* dword align */
282 		adapter->rxd_ring_size * 1536 + 127;	/* 128bytes align */
283 
284 	adapter->ring_vir_addr = dma_alloc_coherent(&pdev->dev, size,
285 						    &adapter->ring_dma, GFP_KERNEL);
286 	if (!adapter->ring_vir_addr)
287 		return -ENOMEM;
288 
289 	/* Init TXD Ring */
290 	adapter->txd_dma = adapter->ring_dma ;
291 	offset = (adapter->txd_dma & 0x7) ? (8 - (adapter->txd_dma & 0x7)) : 0;
292 	adapter->txd_dma += offset;
293 	adapter->txd_ring = adapter->ring_vir_addr + offset;
294 
295 	/* Init TXS Ring */
296 	adapter->txs_dma = adapter->txd_dma + adapter->txd_ring_size;
297 	offset = (adapter->txs_dma & 0x7) ? (8 - (adapter->txs_dma & 0x7)) : 0;
298 	adapter->txs_dma += offset;
299 	adapter->txs_ring = (struct tx_pkt_status *)
300 		(((u8 *)adapter->txd_ring) + (adapter->txd_ring_size + offset));
301 
302 	/* Init RXD Ring */
303 	adapter->rxd_dma = adapter->txs_dma + adapter->txs_ring_size * 4;
304 	offset = (adapter->rxd_dma & 127) ?
305 		(128 - (adapter->rxd_dma & 127)) : 0;
306 	if (offset > 7)
307 		offset -= 8;
308 	else
309 		offset += (128 - 8);
310 
311 	adapter->rxd_dma += offset;
312 	adapter->rxd_ring = (struct rx_desc *) (((u8 *)adapter->txs_ring) +
313 		(adapter->txs_ring_size * 4 + offset));
314 
315 /*
316  * Read / Write Ptr Initialize:
317  *      init_ring_ptrs(adapter);
318  */
319 	return 0;
320 }
321 
322 /**
323  * atl2_irq_enable - Enable default interrupt generation settings
324  * @adapter: board private structure
325  */
326 static inline void atl2_irq_enable(struct atl2_adapter *adapter)
327 {
328 	ATL2_WRITE_REG(&adapter->hw, REG_IMR, IMR_NORMAL_MASK);
329 	ATL2_WRITE_FLUSH(&adapter->hw);
330 }
331 
332 /**
333  * atl2_irq_disable - Mask off interrupt generation on the NIC
334  * @adapter: board private structure
335  */
336 static inline void atl2_irq_disable(struct atl2_adapter *adapter)
337 {
338     ATL2_WRITE_REG(&adapter->hw, REG_IMR, 0);
339     ATL2_WRITE_FLUSH(&adapter->hw);
340     synchronize_irq(adapter->pdev->irq);
341 }
342 
343 static void __atl2_vlan_mode(netdev_features_t features, u32 *ctrl)
344 {
345 	if (features & NETIF_F_HW_VLAN_CTAG_RX) {
346 		/* enable VLAN tag insert/strip */
347 		*ctrl |= MAC_CTRL_RMV_VLAN;
348 	} else {
349 		/* disable VLAN tag insert/strip */
350 		*ctrl &= ~MAC_CTRL_RMV_VLAN;
351 	}
352 }
353 
354 static void atl2_vlan_mode(struct net_device *netdev,
355 	netdev_features_t features)
356 {
357 	struct atl2_adapter *adapter = netdev_priv(netdev);
358 	u32 ctrl;
359 
360 	atl2_irq_disable(adapter);
361 
362 	ctrl = ATL2_READ_REG(&adapter->hw, REG_MAC_CTRL);
363 	__atl2_vlan_mode(features, &ctrl);
364 	ATL2_WRITE_REG(&adapter->hw, REG_MAC_CTRL, ctrl);
365 
366 	atl2_irq_enable(adapter);
367 }
368 
369 static void atl2_restore_vlan(struct atl2_adapter *adapter)
370 {
371 	atl2_vlan_mode(adapter->netdev, adapter->netdev->features);
372 }
373 
374 static netdev_features_t atl2_fix_features(struct net_device *netdev,
375 	netdev_features_t features)
376 {
377 	/*
378 	 * Since there is no support for separate rx/tx vlan accel
379 	 * enable/disable make sure tx flag is always in same state as rx.
380 	 */
381 	if (features & NETIF_F_HW_VLAN_CTAG_RX)
382 		features |= NETIF_F_HW_VLAN_CTAG_TX;
383 	else
384 		features &= ~NETIF_F_HW_VLAN_CTAG_TX;
385 
386 	return features;
387 }
388 
389 static int atl2_set_features(struct net_device *netdev,
390 	netdev_features_t features)
391 {
392 	netdev_features_t changed = netdev->features ^ features;
393 
394 	if (changed & NETIF_F_HW_VLAN_CTAG_RX)
395 		atl2_vlan_mode(netdev, features);
396 
397 	return 0;
398 }
399 
400 static void atl2_intr_rx(struct atl2_adapter *adapter)
401 {
402 	struct net_device *netdev = adapter->netdev;
403 	struct rx_desc *rxd;
404 	struct sk_buff *skb;
405 
406 	do {
407 		rxd = adapter->rxd_ring+adapter->rxd_write_ptr;
408 		if (!rxd->status.update)
409 			break; /* end of tx */
410 
411 		/* clear this flag at once */
412 		rxd->status.update = 0;
413 
414 		if (rxd->status.ok && rxd->status.pkt_size >= 60) {
415 			int rx_size = (int)(rxd->status.pkt_size - 4);
416 			/* alloc new buffer */
417 			skb = netdev_alloc_skb_ip_align(netdev, rx_size);
418 			if (NULL == skb) {
419 				/*
420 				 * Check that some rx space is free. If not,
421 				 * free one and mark stats->rx_dropped++.
422 				 */
423 				netdev->stats.rx_dropped++;
424 				break;
425 			}
426 			memcpy(skb->data, rxd->packet, rx_size);
427 			skb_put(skb, rx_size);
428 			skb->protocol = eth_type_trans(skb, netdev);
429 			if (rxd->status.vlan) {
430 				u16 vlan_tag = (rxd->status.vtag>>4) |
431 					((rxd->status.vtag&7) << 13) |
432 					((rxd->status.vtag&8) << 9);
433 
434 				__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
435 			}
436 			netif_rx(skb);
437 			netdev->stats.rx_bytes += rx_size;
438 			netdev->stats.rx_packets++;
439 		} else {
440 			netdev->stats.rx_errors++;
441 
442 			if (rxd->status.ok && rxd->status.pkt_size <= 60)
443 				netdev->stats.rx_length_errors++;
444 			if (rxd->status.mcast)
445 				netdev->stats.multicast++;
446 			if (rxd->status.crc)
447 				netdev->stats.rx_crc_errors++;
448 			if (rxd->status.align)
449 				netdev->stats.rx_frame_errors++;
450 		}
451 
452 		/* advance write ptr */
453 		if (++adapter->rxd_write_ptr == adapter->rxd_ring_size)
454 			adapter->rxd_write_ptr = 0;
455 	} while (1);
456 
457 	/* update mailbox? */
458 	adapter->rxd_read_ptr = adapter->rxd_write_ptr;
459 	ATL2_WRITE_REGW(&adapter->hw, REG_MB_RXD_RD_IDX, adapter->rxd_read_ptr);
460 }
461 
462 static void atl2_intr_tx(struct atl2_adapter *adapter)
463 {
464 	struct net_device *netdev = adapter->netdev;
465 	u32 txd_read_ptr;
466 	u32 txs_write_ptr;
467 	struct tx_pkt_status *txs;
468 	struct tx_pkt_header *txph;
469 	int free_hole = 0;
470 
471 	do {
472 		txs_write_ptr = (u32) atomic_read(&adapter->txs_write_ptr);
473 		txs = adapter->txs_ring + txs_write_ptr;
474 		if (!txs->update)
475 			break; /* tx stop here */
476 
477 		free_hole = 1;
478 		txs->update = 0;
479 
480 		if (++txs_write_ptr == adapter->txs_ring_size)
481 			txs_write_ptr = 0;
482 		atomic_set(&adapter->txs_write_ptr, (int)txs_write_ptr);
483 
484 		txd_read_ptr = (u32) atomic_read(&adapter->txd_read_ptr);
485 		txph = (struct tx_pkt_header *)
486 			(((u8 *)adapter->txd_ring) + txd_read_ptr);
487 
488 		if (txph->pkt_size != txs->pkt_size) {
489 			struct tx_pkt_status *old_txs = txs;
490 			printk(KERN_WARNING
491 				"%s: txs packet size not consistent with txd"
492 				" txd_:0x%08x, txs_:0x%08x!\n",
493 				adapter->netdev->name,
494 				*(u32 *)txph, *(u32 *)txs);
495 			printk(KERN_WARNING
496 				"txd read ptr: 0x%x\n",
497 				txd_read_ptr);
498 			txs = adapter->txs_ring + txs_write_ptr;
499 			printk(KERN_WARNING
500 				"txs-behind:0x%08x\n",
501 				*(u32 *)txs);
502 			if (txs_write_ptr < 2) {
503 				txs = adapter->txs_ring +
504 					(adapter->txs_ring_size +
505 					txs_write_ptr - 2);
506 			} else {
507 				txs = adapter->txs_ring + (txs_write_ptr - 2);
508 			}
509 			printk(KERN_WARNING
510 				"txs-before:0x%08x\n",
511 				*(u32 *)txs);
512 			txs = old_txs;
513 		}
514 
515 		 /* 4for TPH */
516 		txd_read_ptr += (((u32)(txph->pkt_size) + 7) & ~3);
517 		if (txd_read_ptr >= adapter->txd_ring_size)
518 			txd_read_ptr -= adapter->txd_ring_size;
519 
520 		atomic_set(&adapter->txd_read_ptr, (int)txd_read_ptr);
521 
522 		/* tx statistics: */
523 		if (txs->ok) {
524 			netdev->stats.tx_bytes += txs->pkt_size;
525 			netdev->stats.tx_packets++;
526 		}
527 		else
528 			netdev->stats.tx_errors++;
529 
530 		if (txs->defer)
531 			netdev->stats.collisions++;
532 		if (txs->abort_col)
533 			netdev->stats.tx_aborted_errors++;
534 		if (txs->late_col)
535 			netdev->stats.tx_window_errors++;
536 		if (txs->underrun)
537 			netdev->stats.tx_fifo_errors++;
538 	} while (1);
539 
540 	if (free_hole) {
541 		if (netif_queue_stopped(adapter->netdev) &&
542 			netif_carrier_ok(adapter->netdev))
543 			netif_wake_queue(adapter->netdev);
544 	}
545 }
546 
547 static void atl2_check_for_link(struct atl2_adapter *adapter)
548 {
549 	struct net_device *netdev = adapter->netdev;
550 	u16 phy_data = 0;
551 
552 	spin_lock(&adapter->stats_lock);
553 	atl2_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
554 	atl2_read_phy_reg(&adapter->hw, MII_BMSR, &phy_data);
555 	spin_unlock(&adapter->stats_lock);
556 
557 	/* notify upper layer link down ASAP */
558 	if (!(phy_data & BMSR_LSTATUS)) { /* Link Down */
559 		if (netif_carrier_ok(netdev)) { /* old link state: Up */
560 		printk(KERN_INFO "%s: %s NIC Link is Down\n",
561 			atl2_driver_name, netdev->name);
562 		adapter->link_speed = SPEED_0;
563 		netif_carrier_off(netdev);
564 		netif_stop_queue(netdev);
565 		}
566 	}
567 	schedule_work(&adapter->link_chg_task);
568 }
569 
570 static inline void atl2_clear_phy_int(struct atl2_adapter *adapter)
571 {
572 	u16 phy_data;
573 	spin_lock(&adapter->stats_lock);
574 	atl2_read_phy_reg(&adapter->hw, 19, &phy_data);
575 	spin_unlock(&adapter->stats_lock);
576 }
577 
578 /**
579  * atl2_intr - Interrupt Handler
580  * @irq: interrupt number
581  * @data: pointer to a network interface device structure
582  */
583 static irqreturn_t atl2_intr(int irq, void *data)
584 {
585 	struct atl2_adapter *adapter = netdev_priv(data);
586 	struct atl2_hw *hw = &adapter->hw;
587 	u32 status;
588 
589 	status = ATL2_READ_REG(hw, REG_ISR);
590 	if (0 == status)
591 		return IRQ_NONE;
592 
593 	/* link event */
594 	if (status & ISR_PHY)
595 		atl2_clear_phy_int(adapter);
596 
597 	/* clear ISR status, and Enable CMB DMA/Disable Interrupt */
598 	ATL2_WRITE_REG(hw, REG_ISR, status | ISR_DIS_INT);
599 
600 	/* check if PCIE PHY Link down */
601 	if (status & ISR_PHY_LINKDOWN) {
602 		if (netif_running(adapter->netdev)) { /* reset MAC */
603 			ATL2_WRITE_REG(hw, REG_ISR, 0);
604 			ATL2_WRITE_REG(hw, REG_IMR, 0);
605 			ATL2_WRITE_FLUSH(hw);
606 			schedule_work(&adapter->reset_task);
607 			return IRQ_HANDLED;
608 		}
609 	}
610 
611 	/* check if DMA read/write error? */
612 	if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
613 		ATL2_WRITE_REG(hw, REG_ISR, 0);
614 		ATL2_WRITE_REG(hw, REG_IMR, 0);
615 		ATL2_WRITE_FLUSH(hw);
616 		schedule_work(&adapter->reset_task);
617 		return IRQ_HANDLED;
618 	}
619 
620 	/* link event */
621 	if (status & (ISR_PHY | ISR_MANUAL)) {
622 		adapter->netdev->stats.tx_carrier_errors++;
623 		atl2_check_for_link(adapter);
624 	}
625 
626 	/* transmit event */
627 	if (status & ISR_TX_EVENT)
628 		atl2_intr_tx(adapter);
629 
630 	/* rx exception */
631 	if (status & ISR_RX_EVENT)
632 		atl2_intr_rx(adapter);
633 
634 	/* re-enable Interrupt */
635 	ATL2_WRITE_REG(&adapter->hw, REG_ISR, 0);
636 	return IRQ_HANDLED;
637 }
638 
639 static int atl2_request_irq(struct atl2_adapter *adapter)
640 {
641 	struct net_device *netdev = adapter->netdev;
642 	int flags, err = 0;
643 
644 	flags = IRQF_SHARED;
645 	adapter->have_msi = true;
646 	err = pci_enable_msi(adapter->pdev);
647 	if (err)
648 		adapter->have_msi = false;
649 
650 	if (adapter->have_msi)
651 		flags &= ~IRQF_SHARED;
652 
653 	return request_irq(adapter->pdev->irq, atl2_intr, flags, netdev->name,
654 		netdev);
655 }
656 
657 /**
658  * atl2_free_ring_resources - Free Tx / RX descriptor Resources
659  * @adapter: board private structure
660  *
661  * Free all transmit software resources
662  */
663 static void atl2_free_ring_resources(struct atl2_adapter *adapter)
664 {
665 	struct pci_dev *pdev = adapter->pdev;
666 	dma_free_coherent(&pdev->dev, adapter->ring_size,
667 			  adapter->ring_vir_addr, adapter->ring_dma);
668 }
669 
670 /**
671  * atl2_open - Called when a network interface is made active
672  * @netdev: network interface device structure
673  *
674  * Returns 0 on success, negative value on failure
675  *
676  * The open entry point is called when a network interface is made
677  * active by the system (IFF_UP).  At this point all resources needed
678  * for transmit and receive operations are allocated, the interrupt
679  * handler is registered with the OS, the watchdog timer is started,
680  * and the stack is notified that the interface is ready.
681  */
682 static int atl2_open(struct net_device *netdev)
683 {
684 	struct atl2_adapter *adapter = netdev_priv(netdev);
685 	int err;
686 	u32 val;
687 
688 	/* disallow open during test */
689 	if (test_bit(__ATL2_TESTING, &adapter->flags))
690 		return -EBUSY;
691 
692 	/* allocate transmit descriptors */
693 	err = atl2_setup_ring_resources(adapter);
694 	if (err)
695 		return err;
696 
697 	err = atl2_init_hw(&adapter->hw);
698 	if (err) {
699 		err = -EIO;
700 		goto err_init_hw;
701 	}
702 
703 	/* hardware has been reset, we need to reload some things */
704 	atl2_set_multi(netdev);
705 	init_ring_ptrs(adapter);
706 
707 	atl2_restore_vlan(adapter);
708 
709 	if (atl2_configure(adapter)) {
710 		err = -EIO;
711 		goto err_config;
712 	}
713 
714 	err = atl2_request_irq(adapter);
715 	if (err)
716 		goto err_req_irq;
717 
718 	clear_bit(__ATL2_DOWN, &adapter->flags);
719 
720 	mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 4*HZ));
721 
722 	val = ATL2_READ_REG(&adapter->hw, REG_MASTER_CTRL);
723 	ATL2_WRITE_REG(&adapter->hw, REG_MASTER_CTRL,
724 		val | MASTER_CTRL_MANUAL_INT);
725 
726 	atl2_irq_enable(adapter);
727 
728 	return 0;
729 
730 err_init_hw:
731 err_req_irq:
732 err_config:
733 	atl2_free_ring_resources(adapter);
734 	atl2_reset_hw(&adapter->hw);
735 
736 	return err;
737 }
738 
739 static void atl2_down(struct atl2_adapter *adapter)
740 {
741 	struct net_device *netdev = adapter->netdev;
742 
743 	/* signal that we're down so the interrupt handler does not
744 	 * reschedule our watchdog timer */
745 	set_bit(__ATL2_DOWN, &adapter->flags);
746 
747 	netif_tx_disable(netdev);
748 
749 	/* reset MAC to disable all RX/TX */
750 	atl2_reset_hw(&adapter->hw);
751 	msleep(1);
752 
753 	atl2_irq_disable(adapter);
754 
755 	del_timer_sync(&adapter->watchdog_timer);
756 	del_timer_sync(&adapter->phy_config_timer);
757 	clear_bit(0, &adapter->cfg_phy);
758 
759 	netif_carrier_off(netdev);
760 	adapter->link_speed = SPEED_0;
761 	adapter->link_duplex = -1;
762 }
763 
764 static void atl2_free_irq(struct atl2_adapter *adapter)
765 {
766 	struct net_device *netdev = adapter->netdev;
767 
768 	free_irq(adapter->pdev->irq, netdev);
769 
770 #ifdef CONFIG_PCI_MSI
771 	if (adapter->have_msi)
772 		pci_disable_msi(adapter->pdev);
773 #endif
774 }
775 
776 /**
777  * atl2_close - Disables a network interface
778  * @netdev: network interface device structure
779  *
780  * Returns 0, this is not allowed to fail
781  *
782  * The close entry point is called when an interface is de-activated
783  * by the OS.  The hardware is still under the drivers control, but
784  * needs to be disabled.  A global MAC reset is issued to stop the
785  * hardware, and all transmit and receive resources are freed.
786  */
787 static int atl2_close(struct net_device *netdev)
788 {
789 	struct atl2_adapter *adapter = netdev_priv(netdev);
790 
791 	WARN_ON(test_bit(__ATL2_RESETTING, &adapter->flags));
792 
793 	atl2_down(adapter);
794 	atl2_free_irq(adapter);
795 	atl2_free_ring_resources(adapter);
796 
797 	return 0;
798 }
799 
800 static inline int TxsFreeUnit(struct atl2_adapter *adapter)
801 {
802 	u32 txs_write_ptr = (u32) atomic_read(&adapter->txs_write_ptr);
803 
804 	return (adapter->txs_next_clear >= txs_write_ptr) ?
805 		(int) (adapter->txs_ring_size - adapter->txs_next_clear +
806 		txs_write_ptr - 1) :
807 		(int) (txs_write_ptr - adapter->txs_next_clear - 1);
808 }
809 
810 static inline int TxdFreeBytes(struct atl2_adapter *adapter)
811 {
812 	u32 txd_read_ptr = (u32)atomic_read(&adapter->txd_read_ptr);
813 
814 	return (adapter->txd_write_ptr >= txd_read_ptr) ?
815 		(int) (adapter->txd_ring_size - adapter->txd_write_ptr +
816 		txd_read_ptr - 1) :
817 		(int) (txd_read_ptr - adapter->txd_write_ptr - 1);
818 }
819 
820 static netdev_tx_t atl2_xmit_frame(struct sk_buff *skb,
821 					 struct net_device *netdev)
822 {
823 	struct atl2_adapter *adapter = netdev_priv(netdev);
824 	struct tx_pkt_header *txph;
825 	u32 offset, copy_len;
826 	int txs_unused;
827 	int txbuf_unused;
828 
829 	if (test_bit(__ATL2_DOWN, &adapter->flags)) {
830 		dev_kfree_skb_any(skb);
831 		return NETDEV_TX_OK;
832 	}
833 
834 	if (unlikely(skb->len <= 0)) {
835 		dev_kfree_skb_any(skb);
836 		return NETDEV_TX_OK;
837 	}
838 
839 	txs_unused = TxsFreeUnit(adapter);
840 	txbuf_unused = TxdFreeBytes(adapter);
841 
842 	if (skb->len + sizeof(struct tx_pkt_header) + 4  > txbuf_unused ||
843 		txs_unused < 1) {
844 		/* not enough resources */
845 		netif_stop_queue(netdev);
846 		return NETDEV_TX_BUSY;
847 	}
848 
849 	offset = adapter->txd_write_ptr;
850 
851 	txph = (struct tx_pkt_header *) (((u8 *)adapter->txd_ring) + offset);
852 
853 	*(u32 *)txph = 0;
854 	txph->pkt_size = skb->len;
855 
856 	offset += 4;
857 	if (offset >= adapter->txd_ring_size)
858 		offset -= adapter->txd_ring_size;
859 	copy_len = adapter->txd_ring_size - offset;
860 	if (copy_len >= skb->len) {
861 		memcpy(((u8 *)adapter->txd_ring) + offset, skb->data, skb->len);
862 		offset += ((u32)(skb->len + 3) & ~3);
863 	} else {
864 		memcpy(((u8 *)adapter->txd_ring)+offset, skb->data, copy_len);
865 		memcpy((u8 *)adapter->txd_ring, skb->data+copy_len,
866 			skb->len-copy_len);
867 		offset = ((u32)(skb->len-copy_len + 3) & ~3);
868 	}
869 #ifdef NETIF_F_HW_VLAN_CTAG_TX
870 	if (skb_vlan_tag_present(skb)) {
871 		u16 vlan_tag = skb_vlan_tag_get(skb);
872 		vlan_tag = (vlan_tag << 4) |
873 			(vlan_tag >> 13) |
874 			((vlan_tag >> 9) & 0x8);
875 		txph->ins_vlan = 1;
876 		txph->vlan = vlan_tag;
877 	}
878 #endif
879 	if (offset >= adapter->txd_ring_size)
880 		offset -= adapter->txd_ring_size;
881 	adapter->txd_write_ptr = offset;
882 
883 	/* clear txs before send */
884 	adapter->txs_ring[adapter->txs_next_clear].update = 0;
885 	if (++adapter->txs_next_clear == adapter->txs_ring_size)
886 		adapter->txs_next_clear = 0;
887 
888 	ATL2_WRITE_REGW(&adapter->hw, REG_MB_TXD_WR_IDX,
889 		(adapter->txd_write_ptr >> 2));
890 
891 	dev_consume_skb_any(skb);
892 	return NETDEV_TX_OK;
893 }
894 
895 /**
896  * atl2_change_mtu - Change the Maximum Transfer Unit
897  * @netdev: network interface device structure
898  * @new_mtu: new value for maximum frame size
899  *
900  * Returns 0 on success, negative on failure
901  */
902 static int atl2_change_mtu(struct net_device *netdev, int new_mtu)
903 {
904 	struct atl2_adapter *adapter = netdev_priv(netdev);
905 	struct atl2_hw *hw = &adapter->hw;
906 
907 	/* set MTU */
908 	netdev->mtu = new_mtu;
909 	hw->max_frame_size = new_mtu;
910 	ATL2_WRITE_REG(hw, REG_MTU, new_mtu + ETH_HLEN +
911 		       VLAN_HLEN + ETH_FCS_LEN);
912 
913 	return 0;
914 }
915 
916 /**
917  * atl2_set_mac - Change the Ethernet Address of the NIC
918  * @netdev: network interface device structure
919  * @p: pointer to an address structure
920  *
921  * Returns 0 on success, negative on failure
922  */
923 static int atl2_set_mac(struct net_device *netdev, void *p)
924 {
925 	struct atl2_adapter *adapter = netdev_priv(netdev);
926 	struct sockaddr *addr = p;
927 
928 	if (!is_valid_ether_addr(addr->sa_data))
929 		return -EADDRNOTAVAIL;
930 
931 	if (netif_running(netdev))
932 		return -EBUSY;
933 
934 	eth_hw_addr_set(netdev, addr->sa_data);
935 	memcpy(adapter->hw.mac_addr, addr->sa_data, netdev->addr_len);
936 
937 	atl2_set_mac_addr(&adapter->hw);
938 
939 	return 0;
940 }
941 
942 static int atl2_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
943 {
944 	struct atl2_adapter *adapter = netdev_priv(netdev);
945 	struct mii_ioctl_data *data = if_mii(ifr);
946 	unsigned long flags;
947 
948 	switch (cmd) {
949 	case SIOCGMIIPHY:
950 		data->phy_id = 0;
951 		break;
952 	case SIOCGMIIREG:
953 		spin_lock_irqsave(&adapter->stats_lock, flags);
954 		if (atl2_read_phy_reg(&adapter->hw,
955 			data->reg_num & 0x1F, &data->val_out)) {
956 			spin_unlock_irqrestore(&adapter->stats_lock, flags);
957 			return -EIO;
958 		}
959 		spin_unlock_irqrestore(&adapter->stats_lock, flags);
960 		break;
961 	case SIOCSMIIREG:
962 		if (data->reg_num & ~(0x1F))
963 			return -EFAULT;
964 		spin_lock_irqsave(&adapter->stats_lock, flags);
965 		if (atl2_write_phy_reg(&adapter->hw, data->reg_num,
966 			data->val_in)) {
967 			spin_unlock_irqrestore(&adapter->stats_lock, flags);
968 			return -EIO;
969 		}
970 		spin_unlock_irqrestore(&adapter->stats_lock, flags);
971 		break;
972 	default:
973 		return -EOPNOTSUPP;
974 	}
975 	return 0;
976 }
977 
978 static int atl2_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
979 {
980 	switch (cmd) {
981 	case SIOCGMIIPHY:
982 	case SIOCGMIIREG:
983 	case SIOCSMIIREG:
984 		return atl2_mii_ioctl(netdev, ifr, cmd);
985 #ifdef ETHTOOL_OPS_COMPAT
986 	case SIOCETHTOOL:
987 		return ethtool_ioctl(ifr);
988 #endif
989 	default:
990 		return -EOPNOTSUPP;
991 	}
992 }
993 
994 /**
995  * atl2_tx_timeout - Respond to a Tx Hang
996  * @netdev: network interface device structure
997  * @txqueue: index of the hanging transmit queue
998  */
999 static void atl2_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1000 {
1001 	struct atl2_adapter *adapter = netdev_priv(netdev);
1002 
1003 	/* Do the reset outside of interrupt context */
1004 	schedule_work(&adapter->reset_task);
1005 }
1006 
1007 /**
1008  * atl2_watchdog - Timer Call-back
1009  * @t: timer list containing a pointer to netdev cast into an unsigned long
1010  */
1011 static void atl2_watchdog(struct timer_list *t)
1012 {
1013 	struct atl2_adapter *adapter = from_timer(adapter, t, watchdog_timer);
1014 
1015 	if (!test_bit(__ATL2_DOWN, &adapter->flags)) {
1016 		u32 drop_rxd, drop_rxs;
1017 		unsigned long flags;
1018 
1019 		spin_lock_irqsave(&adapter->stats_lock, flags);
1020 		drop_rxd = ATL2_READ_REG(&adapter->hw, REG_STS_RXD_OV);
1021 		drop_rxs = ATL2_READ_REG(&adapter->hw, REG_STS_RXS_OV);
1022 		spin_unlock_irqrestore(&adapter->stats_lock, flags);
1023 
1024 		adapter->netdev->stats.rx_over_errors += drop_rxd + drop_rxs;
1025 
1026 		/* Reset the timer */
1027 		mod_timer(&adapter->watchdog_timer,
1028 			  round_jiffies(jiffies + 4 * HZ));
1029 	}
1030 }
1031 
1032 /**
1033  * atl2_phy_config - Timer Call-back
1034  * @t: timer list containing a pointer to netdev cast into an unsigned long
1035  */
1036 static void atl2_phy_config(struct timer_list *t)
1037 {
1038 	struct atl2_adapter *adapter = from_timer(adapter, t,
1039 						  phy_config_timer);
1040 	struct atl2_hw *hw = &adapter->hw;
1041 	unsigned long flags;
1042 
1043 	spin_lock_irqsave(&adapter->stats_lock, flags);
1044 	atl2_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
1045 	atl2_write_phy_reg(hw, MII_BMCR, MII_CR_RESET | MII_CR_AUTO_NEG_EN |
1046 		MII_CR_RESTART_AUTO_NEG);
1047 	spin_unlock_irqrestore(&adapter->stats_lock, flags);
1048 	clear_bit(0, &adapter->cfg_phy);
1049 }
1050 
1051 static int atl2_up(struct atl2_adapter *adapter)
1052 {
1053 	struct net_device *netdev = adapter->netdev;
1054 	int err = 0;
1055 	u32 val;
1056 
1057 	/* hardware has been reset, we need to reload some things */
1058 
1059 	err = atl2_init_hw(&adapter->hw);
1060 	if (err) {
1061 		err = -EIO;
1062 		return err;
1063 	}
1064 
1065 	atl2_set_multi(netdev);
1066 	init_ring_ptrs(adapter);
1067 
1068 	atl2_restore_vlan(adapter);
1069 
1070 	if (atl2_configure(adapter)) {
1071 		err = -EIO;
1072 		goto err_up;
1073 	}
1074 
1075 	clear_bit(__ATL2_DOWN, &adapter->flags);
1076 
1077 	val = ATL2_READ_REG(&adapter->hw, REG_MASTER_CTRL);
1078 	ATL2_WRITE_REG(&adapter->hw, REG_MASTER_CTRL, val |
1079 		MASTER_CTRL_MANUAL_INT);
1080 
1081 	atl2_irq_enable(adapter);
1082 
1083 err_up:
1084 	return err;
1085 }
1086 
1087 static void atl2_reinit_locked(struct atl2_adapter *adapter)
1088 {
1089 	while (test_and_set_bit(__ATL2_RESETTING, &adapter->flags))
1090 		msleep(1);
1091 	atl2_down(adapter);
1092 	atl2_up(adapter);
1093 	clear_bit(__ATL2_RESETTING, &adapter->flags);
1094 }
1095 
1096 static void atl2_reset_task(struct work_struct *work)
1097 {
1098 	struct atl2_adapter *adapter;
1099 	adapter = container_of(work, struct atl2_adapter, reset_task);
1100 
1101 	atl2_reinit_locked(adapter);
1102 }
1103 
1104 static void atl2_setup_mac_ctrl(struct atl2_adapter *adapter)
1105 {
1106 	u32 value;
1107 	struct atl2_hw *hw = &adapter->hw;
1108 	struct net_device *netdev = adapter->netdev;
1109 
1110 	/* Config MAC CTRL Register */
1111 	value = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN | MAC_CTRL_MACLP_CLK_PHY;
1112 
1113 	/* duplex */
1114 	if (FULL_DUPLEX == adapter->link_duplex)
1115 		value |= MAC_CTRL_DUPLX;
1116 
1117 	/* flow control */
1118 	value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1119 
1120 	/* PAD & CRC */
1121 	value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1122 
1123 	/* preamble length */
1124 	value |= (((u32)adapter->hw.preamble_len & MAC_CTRL_PRMLEN_MASK) <<
1125 		MAC_CTRL_PRMLEN_SHIFT);
1126 
1127 	/* vlan */
1128 	__atl2_vlan_mode(netdev->features, &value);
1129 
1130 	/* filter mode */
1131 	value |= MAC_CTRL_BC_EN;
1132 	if (netdev->flags & IFF_PROMISC)
1133 		value |= MAC_CTRL_PROMIS_EN;
1134 	else if (netdev->flags & IFF_ALLMULTI)
1135 		value |= MAC_CTRL_MC_ALL_EN;
1136 
1137 	/* half retry buffer */
1138 	value |= (((u32)(adapter->hw.retry_buf &
1139 		MAC_CTRL_HALF_LEFT_BUF_MASK)) << MAC_CTRL_HALF_LEFT_BUF_SHIFT);
1140 
1141 	ATL2_WRITE_REG(hw, REG_MAC_CTRL, value);
1142 }
1143 
1144 static int atl2_check_link(struct atl2_adapter *adapter)
1145 {
1146 	struct atl2_hw *hw = &adapter->hw;
1147 	struct net_device *netdev = adapter->netdev;
1148 	int ret_val;
1149 	u16 speed, duplex, phy_data;
1150 	int reconfig = 0;
1151 
1152 	/* MII_BMSR must read twise */
1153 	atl2_read_phy_reg(hw, MII_BMSR, &phy_data);
1154 	atl2_read_phy_reg(hw, MII_BMSR, &phy_data);
1155 	if (!(phy_data&BMSR_LSTATUS)) { /* link down */
1156 		if (netif_carrier_ok(netdev)) { /* old link state: Up */
1157 			u32 value;
1158 			/* disable rx */
1159 			value = ATL2_READ_REG(hw, REG_MAC_CTRL);
1160 			value &= ~MAC_CTRL_RX_EN;
1161 			ATL2_WRITE_REG(hw, REG_MAC_CTRL, value);
1162 			adapter->link_speed = SPEED_0;
1163 			netif_carrier_off(netdev);
1164 			netif_stop_queue(netdev);
1165 		}
1166 		return 0;
1167 	}
1168 
1169 	/* Link Up */
1170 	ret_val = atl2_get_speed_and_duplex(hw, &speed, &duplex);
1171 	if (ret_val)
1172 		return ret_val;
1173 	switch (hw->MediaType) {
1174 	case MEDIA_TYPE_100M_FULL:
1175 		if (speed  != SPEED_100 || duplex != FULL_DUPLEX)
1176 			reconfig = 1;
1177 		break;
1178 	case MEDIA_TYPE_100M_HALF:
1179 		if (speed  != SPEED_100 || duplex != HALF_DUPLEX)
1180 			reconfig = 1;
1181 		break;
1182 	case MEDIA_TYPE_10M_FULL:
1183 		if (speed != SPEED_10 || duplex != FULL_DUPLEX)
1184 			reconfig = 1;
1185 		break;
1186 	case MEDIA_TYPE_10M_HALF:
1187 		if (speed  != SPEED_10 || duplex != HALF_DUPLEX)
1188 			reconfig = 1;
1189 		break;
1190 	}
1191 	/* link result is our setting */
1192 	if (reconfig == 0) {
1193 		if (adapter->link_speed != speed ||
1194 			adapter->link_duplex != duplex) {
1195 			adapter->link_speed = speed;
1196 			adapter->link_duplex = duplex;
1197 			atl2_setup_mac_ctrl(adapter);
1198 			printk(KERN_INFO "%s: %s NIC Link is Up<%d Mbps %s>\n",
1199 				atl2_driver_name, netdev->name,
1200 				adapter->link_speed,
1201 				adapter->link_duplex == FULL_DUPLEX ?
1202 					"Full Duplex" : "Half Duplex");
1203 		}
1204 
1205 		if (!netif_carrier_ok(netdev)) { /* Link down -> Up */
1206 			netif_carrier_on(netdev);
1207 			netif_wake_queue(netdev);
1208 		}
1209 		return 0;
1210 	}
1211 
1212 	/* change original link status */
1213 	if (netif_carrier_ok(netdev)) {
1214 		u32 value;
1215 		/* disable rx */
1216 		value = ATL2_READ_REG(hw, REG_MAC_CTRL);
1217 		value &= ~MAC_CTRL_RX_EN;
1218 		ATL2_WRITE_REG(hw, REG_MAC_CTRL, value);
1219 
1220 		adapter->link_speed = SPEED_0;
1221 		netif_carrier_off(netdev);
1222 		netif_stop_queue(netdev);
1223 	}
1224 
1225 	/* auto-neg, insert timer to re-config phy
1226 	 * (if interval smaller than 5 seconds, something strange) */
1227 	if (!test_bit(__ATL2_DOWN, &adapter->flags)) {
1228 		if (!test_and_set_bit(0, &adapter->cfg_phy))
1229 			mod_timer(&adapter->phy_config_timer,
1230 				  round_jiffies(jiffies + 5 * HZ));
1231 	}
1232 
1233 	return 0;
1234 }
1235 
1236 /**
1237  * atl2_link_chg_task - deal with link change event Out of interrupt context
1238  * @work: pointer to work struct with private info
1239  */
1240 static void atl2_link_chg_task(struct work_struct *work)
1241 {
1242 	struct atl2_adapter *adapter;
1243 	unsigned long flags;
1244 
1245 	adapter = container_of(work, struct atl2_adapter, link_chg_task);
1246 
1247 	spin_lock_irqsave(&adapter->stats_lock, flags);
1248 	atl2_check_link(adapter);
1249 	spin_unlock_irqrestore(&adapter->stats_lock, flags);
1250 }
1251 
1252 static void atl2_setup_pcicmd(struct pci_dev *pdev)
1253 {
1254 	u16 cmd;
1255 
1256 	pci_read_config_word(pdev, PCI_COMMAND, &cmd);
1257 
1258 	if (cmd & PCI_COMMAND_INTX_DISABLE)
1259 		cmd &= ~PCI_COMMAND_INTX_DISABLE;
1260 	if (cmd & PCI_COMMAND_IO)
1261 		cmd &= ~PCI_COMMAND_IO;
1262 	if (0 == (cmd & PCI_COMMAND_MEMORY))
1263 		cmd |= PCI_COMMAND_MEMORY;
1264 	if (0 == (cmd & PCI_COMMAND_MASTER))
1265 		cmd |= PCI_COMMAND_MASTER;
1266 	pci_write_config_word(pdev, PCI_COMMAND, cmd);
1267 
1268 	/*
1269 	 * some motherboards BIOS(PXE/EFI) driver may set PME
1270 	 * while they transfer control to OS (Windows/Linux)
1271 	 * so we should clear this bit before NIC work normally
1272 	 */
1273 	pci_write_config_dword(pdev, REG_PM_CTRLSTAT, 0);
1274 }
1275 
1276 #ifdef CONFIG_NET_POLL_CONTROLLER
1277 static void atl2_poll_controller(struct net_device *netdev)
1278 {
1279 	disable_irq(netdev->irq);
1280 	atl2_intr(netdev->irq, netdev);
1281 	enable_irq(netdev->irq);
1282 }
1283 #endif
1284 
1285 
1286 static const struct net_device_ops atl2_netdev_ops = {
1287 	.ndo_open		= atl2_open,
1288 	.ndo_stop		= atl2_close,
1289 	.ndo_start_xmit		= atl2_xmit_frame,
1290 	.ndo_set_rx_mode	= atl2_set_multi,
1291 	.ndo_validate_addr	= eth_validate_addr,
1292 	.ndo_set_mac_address	= atl2_set_mac,
1293 	.ndo_change_mtu		= atl2_change_mtu,
1294 	.ndo_fix_features	= atl2_fix_features,
1295 	.ndo_set_features	= atl2_set_features,
1296 	.ndo_eth_ioctl		= atl2_ioctl,
1297 	.ndo_tx_timeout		= atl2_tx_timeout,
1298 #ifdef CONFIG_NET_POLL_CONTROLLER
1299 	.ndo_poll_controller	= atl2_poll_controller,
1300 #endif
1301 };
1302 
1303 /**
1304  * atl2_probe - Device Initialization Routine
1305  * @pdev: PCI device information struct
1306  * @ent: entry in atl2_pci_tbl
1307  *
1308  * Returns 0 on success, negative on failure
1309  *
1310  * atl2_probe initializes an adapter identified by a pci_dev structure.
1311  * The OS initialization, configuring of the adapter private structure,
1312  * and a hardware reset occur.
1313  */
1314 static int atl2_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1315 {
1316 	struct net_device *netdev;
1317 	struct atl2_adapter *adapter;
1318 	static int cards_found = 0;
1319 	unsigned long mmio_start;
1320 	int mmio_len;
1321 	int err;
1322 
1323 	err = pci_enable_device(pdev);
1324 	if (err)
1325 		return err;
1326 
1327 	/*
1328 	 * atl2 is a shared-high-32-bit device, so we're stuck with 32-bit DMA
1329 	 * until the kernel has the proper infrastructure to support 64-bit DMA
1330 	 * on these devices.
1331 	 */
1332 	if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)) &&
1333 	    dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32))) {
1334 		printk(KERN_ERR "atl2: No usable DMA configuration, aborting\n");
1335 		err = -EIO;
1336 		goto err_dma;
1337 	}
1338 
1339 	/* Mark all PCI regions associated with PCI device
1340 	 * pdev as being reserved by owner atl2_driver_name */
1341 	err = pci_request_regions(pdev, atl2_driver_name);
1342 	if (err)
1343 		goto err_pci_reg;
1344 
1345 	/* Enables bus-mastering on the device and calls
1346 	 * pcibios_set_master to do the needed arch specific settings */
1347 	pci_set_master(pdev);
1348 
1349 	netdev = alloc_etherdev(sizeof(struct atl2_adapter));
1350 	if (!netdev) {
1351 		err = -ENOMEM;
1352 		goto err_alloc_etherdev;
1353 	}
1354 
1355 	SET_NETDEV_DEV(netdev, &pdev->dev);
1356 
1357 	pci_set_drvdata(pdev, netdev);
1358 	adapter = netdev_priv(netdev);
1359 	adapter->netdev = netdev;
1360 	adapter->pdev = pdev;
1361 	adapter->hw.back = adapter;
1362 
1363 	mmio_start = pci_resource_start(pdev, 0x0);
1364 	mmio_len = pci_resource_len(pdev, 0x0);
1365 
1366 	adapter->hw.mem_rang = (u32)mmio_len;
1367 	adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
1368 	if (!adapter->hw.hw_addr) {
1369 		err = -EIO;
1370 		goto err_ioremap;
1371 	}
1372 
1373 	atl2_setup_pcicmd(pdev);
1374 
1375 	netdev->netdev_ops = &atl2_netdev_ops;
1376 	netdev->ethtool_ops = &atl2_ethtool_ops;
1377 	netdev->watchdog_timeo = 5 * HZ;
1378 	netdev->min_mtu = 40;
1379 	netdev->max_mtu = ETH_DATA_LEN + VLAN_HLEN;
1380 	strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
1381 
1382 	netdev->mem_start = mmio_start;
1383 	netdev->mem_end = mmio_start + mmio_len;
1384 	adapter->bd_number = cards_found;
1385 	adapter->pci_using_64 = false;
1386 
1387 	/* setup the private structure */
1388 	err = atl2_sw_init(adapter);
1389 	if (err)
1390 		goto err_sw_init;
1391 
1392 	netdev->hw_features = NETIF_F_HW_VLAN_CTAG_RX;
1393 	netdev->features |= (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX);
1394 
1395 	/* Init PHY as early as possible due to power saving issue  */
1396 	atl2_phy_init(&adapter->hw);
1397 
1398 	/* reset the controller to
1399 	 * put the device in a known good starting state */
1400 
1401 	if (atl2_reset_hw(&adapter->hw)) {
1402 		err = -EIO;
1403 		goto err_reset;
1404 	}
1405 
1406 	/* copy the MAC address out of the EEPROM */
1407 	atl2_read_mac_addr(&adapter->hw);
1408 	eth_hw_addr_set(netdev, adapter->hw.mac_addr);
1409 	if (!is_valid_ether_addr(netdev->dev_addr)) {
1410 		err = -EIO;
1411 		goto err_eeprom;
1412 	}
1413 
1414 	atl2_check_options(adapter);
1415 
1416 	timer_setup(&adapter->watchdog_timer, atl2_watchdog, 0);
1417 
1418 	timer_setup(&adapter->phy_config_timer, atl2_phy_config, 0);
1419 
1420 	INIT_WORK(&adapter->reset_task, atl2_reset_task);
1421 	INIT_WORK(&adapter->link_chg_task, atl2_link_chg_task);
1422 
1423 	strcpy(netdev->name, "eth%d"); /* ?? */
1424 	err = register_netdev(netdev);
1425 	if (err)
1426 		goto err_register;
1427 
1428 	/* assume we have no link for now */
1429 	netif_carrier_off(netdev);
1430 	netif_stop_queue(netdev);
1431 
1432 	cards_found++;
1433 
1434 	return 0;
1435 
1436 err_reset:
1437 err_register:
1438 err_sw_init:
1439 err_eeprom:
1440 	iounmap(adapter->hw.hw_addr);
1441 err_ioremap:
1442 	free_netdev(netdev);
1443 err_alloc_etherdev:
1444 	pci_release_regions(pdev);
1445 err_pci_reg:
1446 err_dma:
1447 	pci_disable_device(pdev);
1448 	return err;
1449 }
1450 
1451 /**
1452  * atl2_remove - Device Removal Routine
1453  * @pdev: PCI device information struct
1454  *
1455  * atl2_remove is called by the PCI subsystem to alert the driver
1456  * that it should release a PCI device.  The could be caused by a
1457  * Hot-Plug event, or because the driver is going to be removed from
1458  * memory.
1459  */
1460 /* FIXME: write the original MAC address back in case it was changed from a
1461  * BIOS-set value, as in atl1 -- CHS */
1462 static void atl2_remove(struct pci_dev *pdev)
1463 {
1464 	struct net_device *netdev = pci_get_drvdata(pdev);
1465 	struct atl2_adapter *adapter = netdev_priv(netdev);
1466 
1467 	/* flush_scheduled work may reschedule our watchdog task, so
1468 	 * explicitly disable watchdog tasks from being rescheduled  */
1469 	set_bit(__ATL2_DOWN, &adapter->flags);
1470 
1471 	del_timer_sync(&adapter->watchdog_timer);
1472 	del_timer_sync(&adapter->phy_config_timer);
1473 	cancel_work_sync(&adapter->reset_task);
1474 	cancel_work_sync(&adapter->link_chg_task);
1475 
1476 	unregister_netdev(netdev);
1477 
1478 	atl2_force_ps(&adapter->hw);
1479 
1480 	iounmap(adapter->hw.hw_addr);
1481 	pci_release_regions(pdev);
1482 
1483 	free_netdev(netdev);
1484 
1485 	pci_disable_device(pdev);
1486 }
1487 
1488 static int atl2_suspend(struct pci_dev *pdev, pm_message_t state)
1489 {
1490 	struct net_device *netdev = pci_get_drvdata(pdev);
1491 	struct atl2_adapter *adapter = netdev_priv(netdev);
1492 	struct atl2_hw *hw = &adapter->hw;
1493 	u16 speed, duplex;
1494 	u32 ctrl = 0;
1495 	u32 wufc = adapter->wol;
1496 
1497 #ifdef CONFIG_PM
1498 	int retval = 0;
1499 #endif
1500 
1501 	netif_device_detach(netdev);
1502 
1503 	if (netif_running(netdev)) {
1504 		WARN_ON(test_bit(__ATL2_RESETTING, &adapter->flags));
1505 		atl2_down(adapter);
1506 	}
1507 
1508 #ifdef CONFIG_PM
1509 	retval = pci_save_state(pdev);
1510 	if (retval)
1511 		return retval;
1512 #endif
1513 
1514 	atl2_read_phy_reg(hw, MII_BMSR, (u16 *)&ctrl);
1515 	atl2_read_phy_reg(hw, MII_BMSR, (u16 *)&ctrl);
1516 	if (ctrl & BMSR_LSTATUS)
1517 		wufc &= ~ATLX_WUFC_LNKC;
1518 
1519 	if (0 != (ctrl & BMSR_LSTATUS) && 0 != wufc) {
1520 		u32 ret_val;
1521 		/* get current link speed & duplex */
1522 		ret_val = atl2_get_speed_and_duplex(hw, &speed, &duplex);
1523 		if (ret_val) {
1524 			printk(KERN_DEBUG
1525 				"%s: get speed&duplex error while suspend\n",
1526 				atl2_driver_name);
1527 			goto wol_dis;
1528 		}
1529 
1530 		ctrl = 0;
1531 
1532 		/* turn on magic packet wol */
1533 		if (wufc & ATLX_WUFC_MAG)
1534 			ctrl |= (WOL_MAGIC_EN | WOL_MAGIC_PME_EN);
1535 
1536 		/* ignore Link Chg event when Link is up */
1537 		ATL2_WRITE_REG(hw, REG_WOL_CTRL, ctrl);
1538 
1539 		/* Config MAC CTRL Register */
1540 		ctrl = MAC_CTRL_RX_EN | MAC_CTRL_MACLP_CLK_PHY;
1541 		if (FULL_DUPLEX == adapter->link_duplex)
1542 			ctrl |= MAC_CTRL_DUPLX;
1543 		ctrl |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1544 		ctrl |= (((u32)adapter->hw.preamble_len &
1545 			MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1546 		ctrl |= (((u32)(adapter->hw.retry_buf &
1547 			MAC_CTRL_HALF_LEFT_BUF_MASK)) <<
1548 			MAC_CTRL_HALF_LEFT_BUF_SHIFT);
1549 		if (wufc & ATLX_WUFC_MAG) {
1550 			/* magic packet maybe Broadcast&multicast&Unicast */
1551 			ctrl |= MAC_CTRL_BC_EN;
1552 		}
1553 
1554 		ATL2_WRITE_REG(hw, REG_MAC_CTRL, ctrl);
1555 
1556 		/* pcie patch */
1557 		ctrl = ATL2_READ_REG(hw, REG_PCIE_PHYMISC);
1558 		ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
1559 		ATL2_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
1560 		ctrl = ATL2_READ_REG(hw, REG_PCIE_DLL_TX_CTRL1);
1561 		ctrl |= PCIE_DLL_TX_CTRL1_SEL_NOR_CLK;
1562 		ATL2_WRITE_REG(hw, REG_PCIE_DLL_TX_CTRL1, ctrl);
1563 
1564 		pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
1565 		goto suspend_exit;
1566 	}
1567 
1568 	if (0 == (ctrl&BMSR_LSTATUS) && 0 != (wufc&ATLX_WUFC_LNKC)) {
1569 		/* link is down, so only LINK CHG WOL event enable */
1570 		ctrl |= (WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN);
1571 		ATL2_WRITE_REG(hw, REG_WOL_CTRL, ctrl);
1572 		ATL2_WRITE_REG(hw, REG_MAC_CTRL, 0);
1573 
1574 		/* pcie patch */
1575 		ctrl = ATL2_READ_REG(hw, REG_PCIE_PHYMISC);
1576 		ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
1577 		ATL2_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
1578 		ctrl = ATL2_READ_REG(hw, REG_PCIE_DLL_TX_CTRL1);
1579 		ctrl |= PCIE_DLL_TX_CTRL1_SEL_NOR_CLK;
1580 		ATL2_WRITE_REG(hw, REG_PCIE_DLL_TX_CTRL1, ctrl);
1581 
1582 		hw->phy_configured = false; /* re-init PHY when resume */
1583 
1584 		pci_enable_wake(pdev, pci_choose_state(pdev, state), 1);
1585 
1586 		goto suspend_exit;
1587 	}
1588 
1589 wol_dis:
1590 	/* WOL disabled */
1591 	ATL2_WRITE_REG(hw, REG_WOL_CTRL, 0);
1592 
1593 	/* pcie patch */
1594 	ctrl = ATL2_READ_REG(hw, REG_PCIE_PHYMISC);
1595 	ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
1596 	ATL2_WRITE_REG(hw, REG_PCIE_PHYMISC, ctrl);
1597 	ctrl = ATL2_READ_REG(hw, REG_PCIE_DLL_TX_CTRL1);
1598 	ctrl |= PCIE_DLL_TX_CTRL1_SEL_NOR_CLK;
1599 	ATL2_WRITE_REG(hw, REG_PCIE_DLL_TX_CTRL1, ctrl);
1600 
1601 	atl2_force_ps(hw);
1602 	hw->phy_configured = false; /* re-init PHY when resume */
1603 
1604 	pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
1605 
1606 suspend_exit:
1607 	if (netif_running(netdev))
1608 		atl2_free_irq(adapter);
1609 
1610 	pci_disable_device(pdev);
1611 
1612 	pci_set_power_state(pdev, pci_choose_state(pdev, state));
1613 
1614 	return 0;
1615 }
1616 
1617 #ifdef CONFIG_PM
1618 static int atl2_resume(struct pci_dev *pdev)
1619 {
1620 	struct net_device *netdev = pci_get_drvdata(pdev);
1621 	struct atl2_adapter *adapter = netdev_priv(netdev);
1622 	u32 err;
1623 
1624 	pci_set_power_state(pdev, PCI_D0);
1625 	pci_restore_state(pdev);
1626 
1627 	err = pci_enable_device(pdev);
1628 	if (err) {
1629 		printk(KERN_ERR
1630 			"atl2: Cannot enable PCI device from suspend\n");
1631 		return err;
1632 	}
1633 
1634 	pci_set_master(pdev);
1635 
1636 	ATL2_READ_REG(&adapter->hw, REG_WOL_CTRL); /* clear WOL status */
1637 
1638 	pci_enable_wake(pdev, PCI_D3hot, 0);
1639 	pci_enable_wake(pdev, PCI_D3cold, 0);
1640 
1641 	ATL2_WRITE_REG(&adapter->hw, REG_WOL_CTRL, 0);
1642 
1643 	if (netif_running(netdev)) {
1644 		err = atl2_request_irq(adapter);
1645 		if (err)
1646 			return err;
1647 	}
1648 
1649 	atl2_reset_hw(&adapter->hw);
1650 
1651 	if (netif_running(netdev))
1652 		atl2_up(adapter);
1653 
1654 	netif_device_attach(netdev);
1655 
1656 	return 0;
1657 }
1658 #endif
1659 
1660 static void atl2_shutdown(struct pci_dev *pdev)
1661 {
1662 	atl2_suspend(pdev, PMSG_SUSPEND);
1663 }
1664 
1665 static struct pci_driver atl2_driver = {
1666 	.name     = atl2_driver_name,
1667 	.id_table = atl2_pci_tbl,
1668 	.probe    = atl2_probe,
1669 	.remove   = atl2_remove,
1670 	/* Power Management Hooks */
1671 	.suspend  = atl2_suspend,
1672 #ifdef CONFIG_PM
1673 	.resume   = atl2_resume,
1674 #endif
1675 	.shutdown = atl2_shutdown,
1676 };
1677 
1678 module_pci_driver(atl2_driver);
1679 
1680 static void atl2_read_pci_cfg(struct atl2_hw *hw, u32 reg, u16 *value)
1681 {
1682 	struct atl2_adapter *adapter = hw->back;
1683 	pci_read_config_word(adapter->pdev, reg, value);
1684 }
1685 
1686 static void atl2_write_pci_cfg(struct atl2_hw *hw, u32 reg, u16 *value)
1687 {
1688 	struct atl2_adapter *adapter = hw->back;
1689 	pci_write_config_word(adapter->pdev, reg, *value);
1690 }
1691 
1692 static int atl2_get_link_ksettings(struct net_device *netdev,
1693 				   struct ethtool_link_ksettings *cmd)
1694 {
1695 	struct atl2_adapter *adapter = netdev_priv(netdev);
1696 	struct atl2_hw *hw = &adapter->hw;
1697 	u32 supported, advertising;
1698 
1699 	supported = (SUPPORTED_10baseT_Half |
1700 		SUPPORTED_10baseT_Full |
1701 		SUPPORTED_100baseT_Half |
1702 		SUPPORTED_100baseT_Full |
1703 		SUPPORTED_Autoneg |
1704 		SUPPORTED_TP);
1705 	advertising = ADVERTISED_TP;
1706 
1707 	advertising |= ADVERTISED_Autoneg;
1708 	advertising |= hw->autoneg_advertised;
1709 
1710 	cmd->base.port = PORT_TP;
1711 	cmd->base.phy_address = 0;
1712 
1713 	if (adapter->link_speed != SPEED_0) {
1714 		cmd->base.speed = adapter->link_speed;
1715 		if (adapter->link_duplex == FULL_DUPLEX)
1716 			cmd->base.duplex = DUPLEX_FULL;
1717 		else
1718 			cmd->base.duplex = DUPLEX_HALF;
1719 	} else {
1720 		cmd->base.speed = SPEED_UNKNOWN;
1721 		cmd->base.duplex = DUPLEX_UNKNOWN;
1722 	}
1723 
1724 	cmd->base.autoneg = AUTONEG_ENABLE;
1725 
1726 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1727 						supported);
1728 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1729 						advertising);
1730 
1731 	return 0;
1732 }
1733 
1734 static int atl2_set_link_ksettings(struct net_device *netdev,
1735 				   const struct ethtool_link_ksettings *cmd)
1736 {
1737 	struct atl2_adapter *adapter = netdev_priv(netdev);
1738 	struct atl2_hw *hw = &adapter->hw;
1739 	u32 advertising;
1740 
1741 	ethtool_convert_link_mode_to_legacy_u32(&advertising,
1742 						cmd->link_modes.advertising);
1743 
1744 	while (test_and_set_bit(__ATL2_RESETTING, &adapter->flags))
1745 		msleep(1);
1746 
1747 	if (cmd->base.autoneg == AUTONEG_ENABLE) {
1748 #define MY_ADV_MASK	(ADVERTISE_10_HALF | \
1749 			 ADVERTISE_10_FULL | \
1750 			 ADVERTISE_100_HALF| \
1751 			 ADVERTISE_100_FULL)
1752 
1753 		if ((advertising & MY_ADV_MASK) == MY_ADV_MASK) {
1754 			hw->MediaType = MEDIA_TYPE_AUTO_SENSOR;
1755 			hw->autoneg_advertised =  MY_ADV_MASK;
1756 		} else if ((advertising & MY_ADV_MASK) == ADVERTISE_100_FULL) {
1757 			hw->MediaType = MEDIA_TYPE_100M_FULL;
1758 			hw->autoneg_advertised = ADVERTISE_100_FULL;
1759 		} else if ((advertising & MY_ADV_MASK) == ADVERTISE_100_HALF) {
1760 			hw->MediaType = MEDIA_TYPE_100M_HALF;
1761 			hw->autoneg_advertised = ADVERTISE_100_HALF;
1762 		} else if ((advertising & MY_ADV_MASK) == ADVERTISE_10_FULL) {
1763 			hw->MediaType = MEDIA_TYPE_10M_FULL;
1764 			hw->autoneg_advertised = ADVERTISE_10_FULL;
1765 		}  else if ((advertising & MY_ADV_MASK) == ADVERTISE_10_HALF) {
1766 			hw->MediaType = MEDIA_TYPE_10M_HALF;
1767 			hw->autoneg_advertised = ADVERTISE_10_HALF;
1768 		} else {
1769 			clear_bit(__ATL2_RESETTING, &adapter->flags);
1770 			return -EINVAL;
1771 		}
1772 		advertising = hw->autoneg_advertised |
1773 			ADVERTISED_TP | ADVERTISED_Autoneg;
1774 	} else {
1775 		clear_bit(__ATL2_RESETTING, &adapter->flags);
1776 		return -EINVAL;
1777 	}
1778 
1779 	/* reset the link */
1780 	if (netif_running(adapter->netdev)) {
1781 		atl2_down(adapter);
1782 		atl2_up(adapter);
1783 	} else
1784 		atl2_reset_hw(&adapter->hw);
1785 
1786 	clear_bit(__ATL2_RESETTING, &adapter->flags);
1787 	return 0;
1788 }
1789 
1790 static u32 atl2_get_msglevel(struct net_device *netdev)
1791 {
1792 	return 0;
1793 }
1794 
1795 /*
1796  * It's sane for this to be empty, but we might want to take advantage of this.
1797  */
1798 static void atl2_set_msglevel(struct net_device *netdev, u32 data)
1799 {
1800 }
1801 
1802 static int atl2_get_regs_len(struct net_device *netdev)
1803 {
1804 #define ATL2_REGS_LEN 42
1805 	return sizeof(u32) * ATL2_REGS_LEN;
1806 }
1807 
1808 static void atl2_get_regs(struct net_device *netdev,
1809 	struct ethtool_regs *regs, void *p)
1810 {
1811 	struct atl2_adapter *adapter = netdev_priv(netdev);
1812 	struct atl2_hw *hw = &adapter->hw;
1813 	u32 *regs_buff = p;
1814 	u16 phy_data;
1815 
1816 	memset(p, 0, sizeof(u32) * ATL2_REGS_LEN);
1817 
1818 	regs->version = (1 << 24) | (hw->revision_id << 16) | hw->device_id;
1819 
1820 	regs_buff[0]  = ATL2_READ_REG(hw, REG_VPD_CAP);
1821 	regs_buff[1]  = ATL2_READ_REG(hw, REG_SPI_FLASH_CTRL);
1822 	regs_buff[2]  = ATL2_READ_REG(hw, REG_SPI_FLASH_CONFIG);
1823 	regs_buff[3]  = ATL2_READ_REG(hw, REG_TWSI_CTRL);
1824 	regs_buff[4]  = ATL2_READ_REG(hw, REG_PCIE_DEV_MISC_CTRL);
1825 	regs_buff[5]  = ATL2_READ_REG(hw, REG_MASTER_CTRL);
1826 	regs_buff[6]  = ATL2_READ_REG(hw, REG_MANUAL_TIMER_INIT);
1827 	regs_buff[7]  = ATL2_READ_REG(hw, REG_IRQ_MODU_TIMER_INIT);
1828 	regs_buff[8]  = ATL2_READ_REG(hw, REG_PHY_ENABLE);
1829 	regs_buff[9]  = ATL2_READ_REG(hw, REG_CMBDISDMA_TIMER);
1830 	regs_buff[10] = ATL2_READ_REG(hw, REG_IDLE_STATUS);
1831 	regs_buff[11] = ATL2_READ_REG(hw, REG_MDIO_CTRL);
1832 	regs_buff[12] = ATL2_READ_REG(hw, REG_SERDES_LOCK);
1833 	regs_buff[13] = ATL2_READ_REG(hw, REG_MAC_CTRL);
1834 	regs_buff[14] = ATL2_READ_REG(hw, REG_MAC_IPG_IFG);
1835 	regs_buff[15] = ATL2_READ_REG(hw, REG_MAC_STA_ADDR);
1836 	regs_buff[16] = ATL2_READ_REG(hw, REG_MAC_STA_ADDR+4);
1837 	regs_buff[17] = ATL2_READ_REG(hw, REG_RX_HASH_TABLE);
1838 	regs_buff[18] = ATL2_READ_REG(hw, REG_RX_HASH_TABLE+4);
1839 	regs_buff[19] = ATL2_READ_REG(hw, REG_MAC_HALF_DUPLX_CTRL);
1840 	regs_buff[20] = ATL2_READ_REG(hw, REG_MTU);
1841 	regs_buff[21] = ATL2_READ_REG(hw, REG_WOL_CTRL);
1842 	regs_buff[22] = ATL2_READ_REG(hw, REG_SRAM_TXRAM_END);
1843 	regs_buff[23] = ATL2_READ_REG(hw, REG_DESC_BASE_ADDR_HI);
1844 	regs_buff[24] = ATL2_READ_REG(hw, REG_TXD_BASE_ADDR_LO);
1845 	regs_buff[25] = ATL2_READ_REG(hw, REG_TXD_MEM_SIZE);
1846 	regs_buff[26] = ATL2_READ_REG(hw, REG_TXS_BASE_ADDR_LO);
1847 	regs_buff[27] = ATL2_READ_REG(hw, REG_TXS_MEM_SIZE);
1848 	regs_buff[28] = ATL2_READ_REG(hw, REG_RXD_BASE_ADDR_LO);
1849 	regs_buff[29] = ATL2_READ_REG(hw, REG_RXD_BUF_NUM);
1850 	regs_buff[30] = ATL2_READ_REG(hw, REG_DMAR);
1851 	regs_buff[31] = ATL2_READ_REG(hw, REG_TX_CUT_THRESH);
1852 	regs_buff[32] = ATL2_READ_REG(hw, REG_DMAW);
1853 	regs_buff[33] = ATL2_READ_REG(hw, REG_PAUSE_ON_TH);
1854 	regs_buff[34] = ATL2_READ_REG(hw, REG_PAUSE_OFF_TH);
1855 	regs_buff[35] = ATL2_READ_REG(hw, REG_MB_TXD_WR_IDX);
1856 	regs_buff[36] = ATL2_READ_REG(hw, REG_MB_RXD_RD_IDX);
1857 	regs_buff[38] = ATL2_READ_REG(hw, REG_ISR);
1858 	regs_buff[39] = ATL2_READ_REG(hw, REG_IMR);
1859 
1860 	atl2_read_phy_reg(hw, MII_BMCR, &phy_data);
1861 	regs_buff[40] = (u32)phy_data;
1862 	atl2_read_phy_reg(hw, MII_BMSR, &phy_data);
1863 	regs_buff[41] = (u32)phy_data;
1864 }
1865 
1866 static int atl2_get_eeprom_len(struct net_device *netdev)
1867 {
1868 	struct atl2_adapter *adapter = netdev_priv(netdev);
1869 
1870 	if (!atl2_check_eeprom_exist(&adapter->hw))
1871 		return 512;
1872 	else
1873 		return 0;
1874 }
1875 
1876 static int atl2_get_eeprom(struct net_device *netdev,
1877 	struct ethtool_eeprom *eeprom, u8 *bytes)
1878 {
1879 	struct atl2_adapter *adapter = netdev_priv(netdev);
1880 	struct atl2_hw *hw = &adapter->hw;
1881 	u32 *eeprom_buff;
1882 	int first_dword, last_dword;
1883 	int ret_val = 0;
1884 	int i;
1885 
1886 	if (eeprom->len == 0)
1887 		return -EINVAL;
1888 
1889 	if (atl2_check_eeprom_exist(hw))
1890 		return -EINVAL;
1891 
1892 	eeprom->magic = hw->vendor_id | (hw->device_id << 16);
1893 
1894 	first_dword = eeprom->offset >> 2;
1895 	last_dword = (eeprom->offset + eeprom->len - 1) >> 2;
1896 
1897 	eeprom_buff = kmalloc_array(last_dword - first_dword + 1, sizeof(u32),
1898 				    GFP_KERNEL);
1899 	if (!eeprom_buff)
1900 		return -ENOMEM;
1901 
1902 	for (i = first_dword; i < last_dword; i++) {
1903 		if (!atl2_read_eeprom(hw, i*4, &(eeprom_buff[i-first_dword]))) {
1904 			ret_val = -EIO;
1905 			goto free;
1906 		}
1907 	}
1908 
1909 	memcpy(bytes, (u8 *)eeprom_buff + (eeprom->offset & 3),
1910 		eeprom->len);
1911 free:
1912 	kfree(eeprom_buff);
1913 
1914 	return ret_val;
1915 }
1916 
1917 static int atl2_set_eeprom(struct net_device *netdev,
1918 	struct ethtool_eeprom *eeprom, u8 *bytes)
1919 {
1920 	struct atl2_adapter *adapter = netdev_priv(netdev);
1921 	struct atl2_hw *hw = &adapter->hw;
1922 	u32 *eeprom_buff;
1923 	u32 *ptr;
1924 	int max_len, first_dword, last_dword, ret_val = 0;
1925 	int i;
1926 
1927 	if (eeprom->len == 0)
1928 		return -EOPNOTSUPP;
1929 
1930 	if (eeprom->magic != (hw->vendor_id | (hw->device_id << 16)))
1931 		return -EFAULT;
1932 
1933 	max_len = 512;
1934 
1935 	first_dword = eeprom->offset >> 2;
1936 	last_dword = (eeprom->offset + eeprom->len - 1) >> 2;
1937 	eeprom_buff = kmalloc(max_len, GFP_KERNEL);
1938 	if (!eeprom_buff)
1939 		return -ENOMEM;
1940 
1941 	ptr = eeprom_buff;
1942 
1943 	if (eeprom->offset & 3) {
1944 		/* need read/modify/write of first changed EEPROM word */
1945 		/* only the second byte of the word is being modified */
1946 		if (!atl2_read_eeprom(hw, first_dword*4, &(eeprom_buff[0]))) {
1947 			ret_val = -EIO;
1948 			goto out;
1949 		}
1950 		ptr++;
1951 	}
1952 	if (((eeprom->offset + eeprom->len) & 3)) {
1953 		/*
1954 		 * need read/modify/write of last changed EEPROM word
1955 		 * only the first byte of the word is being modified
1956 		 */
1957 		if (!atl2_read_eeprom(hw, last_dword * 4,
1958 					&(eeprom_buff[last_dword - first_dword]))) {
1959 			ret_val = -EIO;
1960 			goto out;
1961 		}
1962 	}
1963 
1964 	/* Device's eeprom is always little-endian, word addressable */
1965 	memcpy(ptr, bytes, eeprom->len);
1966 
1967 	for (i = 0; i < last_dword - first_dword + 1; i++) {
1968 		if (!atl2_write_eeprom(hw, ((first_dword+i)*4), eeprom_buff[i])) {
1969 			ret_val = -EIO;
1970 			goto out;
1971 		}
1972 	}
1973  out:
1974 	kfree(eeprom_buff);
1975 	return ret_val;
1976 }
1977 
1978 static void atl2_get_drvinfo(struct net_device *netdev,
1979 	struct ethtool_drvinfo *drvinfo)
1980 {
1981 	struct atl2_adapter *adapter = netdev_priv(netdev);
1982 
1983 	strlcpy(drvinfo->driver,  atl2_driver_name, sizeof(drvinfo->driver));
1984 	strlcpy(drvinfo->fw_version, "L2", sizeof(drvinfo->fw_version));
1985 	strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
1986 		sizeof(drvinfo->bus_info));
1987 }
1988 
1989 static void atl2_get_wol(struct net_device *netdev,
1990 	struct ethtool_wolinfo *wol)
1991 {
1992 	struct atl2_adapter *adapter = netdev_priv(netdev);
1993 
1994 	wol->supported = WAKE_MAGIC;
1995 	wol->wolopts = 0;
1996 
1997 	if (adapter->wol & ATLX_WUFC_EX)
1998 		wol->wolopts |= WAKE_UCAST;
1999 	if (adapter->wol & ATLX_WUFC_MC)
2000 		wol->wolopts |= WAKE_MCAST;
2001 	if (adapter->wol & ATLX_WUFC_BC)
2002 		wol->wolopts |= WAKE_BCAST;
2003 	if (adapter->wol & ATLX_WUFC_MAG)
2004 		wol->wolopts |= WAKE_MAGIC;
2005 	if (adapter->wol & ATLX_WUFC_LNKC)
2006 		wol->wolopts |= WAKE_PHY;
2007 }
2008 
2009 static int atl2_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
2010 {
2011 	struct atl2_adapter *adapter = netdev_priv(netdev);
2012 
2013 	if (wol->wolopts & (WAKE_ARP | WAKE_MAGICSECURE))
2014 		return -EOPNOTSUPP;
2015 
2016 	if (wol->wolopts & (WAKE_UCAST | WAKE_BCAST | WAKE_MCAST))
2017 		return -EOPNOTSUPP;
2018 
2019 	/* these settings will always override what we currently have */
2020 	adapter->wol = 0;
2021 
2022 	if (wol->wolopts & WAKE_MAGIC)
2023 		adapter->wol |= ATLX_WUFC_MAG;
2024 	if (wol->wolopts & WAKE_PHY)
2025 		adapter->wol |= ATLX_WUFC_LNKC;
2026 
2027 	return 0;
2028 }
2029 
2030 static int atl2_nway_reset(struct net_device *netdev)
2031 {
2032 	struct atl2_adapter *adapter = netdev_priv(netdev);
2033 	if (netif_running(netdev))
2034 		atl2_reinit_locked(adapter);
2035 	return 0;
2036 }
2037 
2038 static const struct ethtool_ops atl2_ethtool_ops = {
2039 	.get_drvinfo		= atl2_get_drvinfo,
2040 	.get_regs_len		= atl2_get_regs_len,
2041 	.get_regs		= atl2_get_regs,
2042 	.get_wol		= atl2_get_wol,
2043 	.set_wol		= atl2_set_wol,
2044 	.get_msglevel		= atl2_get_msglevel,
2045 	.set_msglevel		= atl2_set_msglevel,
2046 	.nway_reset		= atl2_nway_reset,
2047 	.get_link		= ethtool_op_get_link,
2048 	.get_eeprom_len		= atl2_get_eeprom_len,
2049 	.get_eeprom		= atl2_get_eeprom,
2050 	.set_eeprom		= atl2_set_eeprom,
2051 	.get_link_ksettings	= atl2_get_link_ksettings,
2052 	.set_link_ksettings	= atl2_set_link_ksettings,
2053 };
2054 
2055 #define LBYTESWAP(a)  ((((a) & 0x00ff00ff) << 8) | \
2056 	(((a) & 0xff00ff00) >> 8))
2057 #define LONGSWAP(a)   ((LBYTESWAP(a) << 16) | (LBYTESWAP(a) >> 16))
2058 #define SHORTSWAP(a)  (((a) << 8) | ((a) >> 8))
2059 
2060 /*
2061  * Reset the transmit and receive units; mask and clear all interrupts.
2062  *
2063  * hw - Struct containing variables accessed by shared code
2064  * return : 0  or  idle status (if error)
2065  */
2066 static s32 atl2_reset_hw(struct atl2_hw *hw)
2067 {
2068 	u32 icr;
2069 	u16 pci_cfg_cmd_word;
2070 	int i;
2071 
2072 	/* Workaround for PCI problem when BIOS sets MMRBC incorrectly. */
2073 	atl2_read_pci_cfg(hw, PCI_REG_COMMAND, &pci_cfg_cmd_word);
2074 	if ((pci_cfg_cmd_word &
2075 		(CMD_IO_SPACE|CMD_MEMORY_SPACE|CMD_BUS_MASTER)) !=
2076 		(CMD_IO_SPACE|CMD_MEMORY_SPACE|CMD_BUS_MASTER)) {
2077 		pci_cfg_cmd_word |=
2078 			(CMD_IO_SPACE|CMD_MEMORY_SPACE|CMD_BUS_MASTER);
2079 		atl2_write_pci_cfg(hw, PCI_REG_COMMAND, &pci_cfg_cmd_word);
2080 	}
2081 
2082 	/* Clear Interrupt mask to stop board from generating
2083 	 * interrupts & Clear any pending interrupt events
2084 	 */
2085 	/* FIXME */
2086 	/* ATL2_WRITE_REG(hw, REG_IMR, 0); */
2087 	/* ATL2_WRITE_REG(hw, REG_ISR, 0xffffffff); */
2088 
2089 	/* Issue Soft Reset to the MAC.  This will reset the chip's
2090 	 * transmit, receive, DMA.  It will not effect
2091 	 * the current PCI configuration.  The global reset bit is self-
2092 	 * clearing, and should clear within a microsecond.
2093 	 */
2094 	ATL2_WRITE_REG(hw, REG_MASTER_CTRL, MASTER_CTRL_SOFT_RST);
2095 	wmb();
2096 	msleep(1); /* delay about 1ms */
2097 
2098 	/* Wait at least 10ms for All module to be Idle */
2099 	for (i = 0; i < 10; i++) {
2100 		icr = ATL2_READ_REG(hw, REG_IDLE_STATUS);
2101 		if (!icr)
2102 			break;
2103 		msleep(1); /* delay 1 ms */
2104 		cpu_relax();
2105 	}
2106 
2107 	if (icr)
2108 		return icr;
2109 
2110 	return 0;
2111 }
2112 
2113 #define CUSTOM_SPI_CS_SETUP        2
2114 #define CUSTOM_SPI_CLK_HI          2
2115 #define CUSTOM_SPI_CLK_LO          2
2116 #define CUSTOM_SPI_CS_HOLD         2
2117 #define CUSTOM_SPI_CS_HI           3
2118 
2119 static struct atl2_spi_flash_dev flash_table[] =
2120 {
2121 /* MFR    WRSR  READ  PROGRAM WREN  WRDI  RDSR  RDID  SECTOR_ERASE CHIP_ERASE */
2122 {"Atmel", 0x0,  0x03, 0x02,   0x06, 0x04, 0x05, 0x15, 0x52,        0x62 },
2123 {"SST",   0x01, 0x03, 0x02,   0x06, 0x04, 0x05, 0x90, 0x20,        0x60 },
2124 {"ST",    0x01, 0x03, 0x02,   0x06, 0x04, 0x05, 0xAB, 0xD8,        0xC7 },
2125 };
2126 
2127 static bool atl2_spi_read(struct atl2_hw *hw, u32 addr, u32 *buf)
2128 {
2129 	int i;
2130 	u32 value;
2131 
2132 	ATL2_WRITE_REG(hw, REG_SPI_DATA, 0);
2133 	ATL2_WRITE_REG(hw, REG_SPI_ADDR, addr);
2134 
2135 	value = SPI_FLASH_CTRL_WAIT_READY |
2136 		(CUSTOM_SPI_CS_SETUP & SPI_FLASH_CTRL_CS_SETUP_MASK) <<
2137 			SPI_FLASH_CTRL_CS_SETUP_SHIFT |
2138 		(CUSTOM_SPI_CLK_HI & SPI_FLASH_CTRL_CLK_HI_MASK) <<
2139 			SPI_FLASH_CTRL_CLK_HI_SHIFT |
2140 		(CUSTOM_SPI_CLK_LO & SPI_FLASH_CTRL_CLK_LO_MASK) <<
2141 			SPI_FLASH_CTRL_CLK_LO_SHIFT |
2142 		(CUSTOM_SPI_CS_HOLD & SPI_FLASH_CTRL_CS_HOLD_MASK) <<
2143 			SPI_FLASH_CTRL_CS_HOLD_SHIFT |
2144 		(CUSTOM_SPI_CS_HI & SPI_FLASH_CTRL_CS_HI_MASK) <<
2145 			SPI_FLASH_CTRL_CS_HI_SHIFT |
2146 		(0x1 & SPI_FLASH_CTRL_INS_MASK) << SPI_FLASH_CTRL_INS_SHIFT;
2147 
2148 	ATL2_WRITE_REG(hw, REG_SPI_FLASH_CTRL, value);
2149 
2150 	value |= SPI_FLASH_CTRL_START;
2151 
2152 	ATL2_WRITE_REG(hw, REG_SPI_FLASH_CTRL, value);
2153 
2154 	for (i = 0; i < 10; i++) {
2155 		msleep(1);
2156 		value = ATL2_READ_REG(hw, REG_SPI_FLASH_CTRL);
2157 		if (!(value & SPI_FLASH_CTRL_START))
2158 			break;
2159 	}
2160 
2161 	if (value & SPI_FLASH_CTRL_START)
2162 		return false;
2163 
2164 	*buf = ATL2_READ_REG(hw, REG_SPI_DATA);
2165 
2166 	return true;
2167 }
2168 
2169 /*
2170  * get_permanent_address
2171  * return 0 if get valid mac address,
2172  */
2173 static int get_permanent_address(struct atl2_hw *hw)
2174 {
2175 	u32 Addr[2];
2176 	u32 i, Control;
2177 	u16 Register;
2178 	u8  EthAddr[ETH_ALEN];
2179 	bool KeyValid;
2180 
2181 	if (is_valid_ether_addr(hw->perm_mac_addr))
2182 		return 0;
2183 
2184 	Addr[0] = 0;
2185 	Addr[1] = 0;
2186 
2187 	if (!atl2_check_eeprom_exist(hw)) { /* eeprom exists */
2188 		Register = 0;
2189 		KeyValid = false;
2190 
2191 		/* Read out all EEPROM content */
2192 		i = 0;
2193 		while (1) {
2194 			if (atl2_read_eeprom(hw, i + 0x100, &Control)) {
2195 				if (KeyValid) {
2196 					if (Register == REG_MAC_STA_ADDR)
2197 						Addr[0] = Control;
2198 					else if (Register ==
2199 						(REG_MAC_STA_ADDR + 4))
2200 						Addr[1] = Control;
2201 					KeyValid = false;
2202 				} else if ((Control & 0xff) == 0x5A) {
2203 					KeyValid = true;
2204 					Register = (u16) (Control >> 16);
2205 				} else {
2206 			/* assume data end while encount an invalid KEYWORD */
2207 					break;
2208 				}
2209 			} else {
2210 				break; /* read error */
2211 			}
2212 			i += 4;
2213 		}
2214 
2215 		*(u32 *) &EthAddr[2] = LONGSWAP(Addr[0]);
2216 		*(u16 *) &EthAddr[0] = SHORTSWAP(*(u16 *) &Addr[1]);
2217 
2218 		if (is_valid_ether_addr(EthAddr)) {
2219 			memcpy(hw->perm_mac_addr, EthAddr, ETH_ALEN);
2220 			return 0;
2221 		}
2222 		return 1;
2223 	}
2224 
2225 	/* see if SPI flash exists? */
2226 	Addr[0] = 0;
2227 	Addr[1] = 0;
2228 	Register = 0;
2229 	KeyValid = false;
2230 	i = 0;
2231 	while (1) {
2232 		if (atl2_spi_read(hw, i + 0x1f000, &Control)) {
2233 			if (KeyValid) {
2234 				if (Register == REG_MAC_STA_ADDR)
2235 					Addr[0] = Control;
2236 				else if (Register == (REG_MAC_STA_ADDR + 4))
2237 					Addr[1] = Control;
2238 				KeyValid = false;
2239 			} else if ((Control & 0xff) == 0x5A) {
2240 				KeyValid = true;
2241 				Register = (u16) (Control >> 16);
2242 			} else {
2243 				break; /* data end */
2244 			}
2245 		} else {
2246 			break; /* read error */
2247 		}
2248 		i += 4;
2249 	}
2250 
2251 	*(u32 *) &EthAddr[2] = LONGSWAP(Addr[0]);
2252 	*(u16 *) &EthAddr[0] = SHORTSWAP(*(u16 *)&Addr[1]);
2253 	if (is_valid_ether_addr(EthAddr)) {
2254 		memcpy(hw->perm_mac_addr, EthAddr, ETH_ALEN);
2255 		return 0;
2256 	}
2257 	/* maybe MAC-address is from BIOS */
2258 	Addr[0] = ATL2_READ_REG(hw, REG_MAC_STA_ADDR);
2259 	Addr[1] = ATL2_READ_REG(hw, REG_MAC_STA_ADDR + 4);
2260 	*(u32 *) &EthAddr[2] = LONGSWAP(Addr[0]);
2261 	*(u16 *) &EthAddr[0] = SHORTSWAP(*(u16 *) &Addr[1]);
2262 
2263 	if (is_valid_ether_addr(EthAddr)) {
2264 		memcpy(hw->perm_mac_addr, EthAddr, ETH_ALEN);
2265 		return 0;
2266 	}
2267 
2268 	return 1;
2269 }
2270 
2271 /*
2272  * Reads the adapter's MAC address from the EEPROM
2273  *
2274  * hw - Struct containing variables accessed by shared code
2275  */
2276 static s32 atl2_read_mac_addr(struct atl2_hw *hw)
2277 {
2278 	if (get_permanent_address(hw)) {
2279 		/* for test */
2280 		/* FIXME: shouldn't we use eth_random_addr() here? */
2281 		hw->perm_mac_addr[0] = 0x00;
2282 		hw->perm_mac_addr[1] = 0x13;
2283 		hw->perm_mac_addr[2] = 0x74;
2284 		hw->perm_mac_addr[3] = 0x00;
2285 		hw->perm_mac_addr[4] = 0x5c;
2286 		hw->perm_mac_addr[5] = 0x38;
2287 	}
2288 
2289 	memcpy(hw->mac_addr, hw->perm_mac_addr, ETH_ALEN);
2290 
2291 	return 0;
2292 }
2293 
2294 /*
2295  * Hashes an address to determine its location in the multicast table
2296  *
2297  * hw - Struct containing variables accessed by shared code
2298  * mc_addr - the multicast address to hash
2299  *
2300  * atl2_hash_mc_addr
2301  *  purpose
2302  *      set hash value for a multicast address
2303  *      hash calcu processing :
2304  *          1. calcu 32bit CRC for multicast address
2305  *          2. reverse crc with MSB to LSB
2306  */
2307 static u32 atl2_hash_mc_addr(struct atl2_hw *hw, u8 *mc_addr)
2308 {
2309 	u32 crc32, value;
2310 	int i;
2311 
2312 	value = 0;
2313 	crc32 = ether_crc_le(6, mc_addr);
2314 
2315 	for (i = 0; i < 32; i++)
2316 		value |= (((crc32 >> i) & 1) << (31 - i));
2317 
2318 	return value;
2319 }
2320 
2321 /*
2322  * Sets the bit in the multicast table corresponding to the hash value.
2323  *
2324  * hw - Struct containing variables accessed by shared code
2325  * hash_value - Multicast address hash value
2326  */
2327 static void atl2_hash_set(struct atl2_hw *hw, u32 hash_value)
2328 {
2329 	u32 hash_bit, hash_reg;
2330 	u32 mta;
2331 
2332 	/* The HASH Table  is a register array of 2 32-bit registers.
2333 	 * It is treated like an array of 64 bits.  We want to set
2334 	 * bit BitArray[hash_value]. So we figure out what register
2335 	 * the bit is in, read it, OR in the new bit, then write
2336 	 * back the new value.  The register is determined by the
2337 	 * upper 7 bits of the hash value and the bit within that
2338 	 * register are determined by the lower 5 bits of the value.
2339 	 */
2340 	hash_reg = (hash_value >> 31) & 0x1;
2341 	hash_bit = (hash_value >> 26) & 0x1F;
2342 
2343 	mta = ATL2_READ_REG_ARRAY(hw, REG_RX_HASH_TABLE, hash_reg);
2344 
2345 	mta |= (1 << hash_bit);
2346 
2347 	ATL2_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, hash_reg, mta);
2348 }
2349 
2350 /*
2351  * atl2_init_pcie - init PCIE module
2352  */
2353 static void atl2_init_pcie(struct atl2_hw *hw)
2354 {
2355     u32 value;
2356     value = LTSSM_TEST_MODE_DEF;
2357     ATL2_WRITE_REG(hw, REG_LTSSM_TEST_MODE, value);
2358 
2359     value = PCIE_DLL_TX_CTRL1_DEF;
2360     ATL2_WRITE_REG(hw, REG_PCIE_DLL_TX_CTRL1, value);
2361 }
2362 
2363 static void atl2_init_flash_opcode(struct atl2_hw *hw)
2364 {
2365 	if (hw->flash_vendor >= ARRAY_SIZE(flash_table))
2366 		hw->flash_vendor = 0; /* ATMEL */
2367 
2368 	/* Init OP table */
2369 	ATL2_WRITE_REGB(hw, REG_SPI_FLASH_OP_PROGRAM,
2370 		flash_table[hw->flash_vendor].cmdPROGRAM);
2371 	ATL2_WRITE_REGB(hw, REG_SPI_FLASH_OP_SC_ERASE,
2372 		flash_table[hw->flash_vendor].cmdSECTOR_ERASE);
2373 	ATL2_WRITE_REGB(hw, REG_SPI_FLASH_OP_CHIP_ERASE,
2374 		flash_table[hw->flash_vendor].cmdCHIP_ERASE);
2375 	ATL2_WRITE_REGB(hw, REG_SPI_FLASH_OP_RDID,
2376 		flash_table[hw->flash_vendor].cmdRDID);
2377 	ATL2_WRITE_REGB(hw, REG_SPI_FLASH_OP_WREN,
2378 		flash_table[hw->flash_vendor].cmdWREN);
2379 	ATL2_WRITE_REGB(hw, REG_SPI_FLASH_OP_RDSR,
2380 		flash_table[hw->flash_vendor].cmdRDSR);
2381 	ATL2_WRITE_REGB(hw, REG_SPI_FLASH_OP_WRSR,
2382 		flash_table[hw->flash_vendor].cmdWRSR);
2383 	ATL2_WRITE_REGB(hw, REG_SPI_FLASH_OP_READ,
2384 		flash_table[hw->flash_vendor].cmdREAD);
2385 }
2386 
2387 /********************************************************************
2388 * Performs basic configuration of the adapter.
2389 *
2390 * hw - Struct containing variables accessed by shared code
2391 * Assumes that the controller has previously been reset and is in a
2392 * post-reset uninitialized state. Initializes multicast table,
2393 * and  Calls routines to setup link
2394 * Leaves the transmit and receive units disabled and uninitialized.
2395 ********************************************************************/
2396 static s32 atl2_init_hw(struct atl2_hw *hw)
2397 {
2398 	u32 ret_val = 0;
2399 
2400 	atl2_init_pcie(hw);
2401 
2402 	/* Zero out the Multicast HASH table */
2403 	/* clear the old settings from the multicast hash table */
2404 	ATL2_WRITE_REG(hw, REG_RX_HASH_TABLE, 0);
2405 	ATL2_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, 1, 0);
2406 
2407 	atl2_init_flash_opcode(hw);
2408 
2409 	ret_val = atl2_phy_init(hw);
2410 
2411 	return ret_val;
2412 }
2413 
2414 /*
2415  * Detects the current speed and duplex settings of the hardware.
2416  *
2417  * hw - Struct containing variables accessed by shared code
2418  * speed - Speed of the connection
2419  * duplex - Duplex setting of the connection
2420  */
2421 static s32 atl2_get_speed_and_duplex(struct atl2_hw *hw, u16 *speed,
2422 	u16 *duplex)
2423 {
2424 	s32 ret_val;
2425 	u16 phy_data;
2426 
2427 	/* Read PHY Specific Status Register (17) */
2428 	ret_val = atl2_read_phy_reg(hw, MII_ATLX_PSSR, &phy_data);
2429 	if (ret_val)
2430 		return ret_val;
2431 
2432 	if (!(phy_data & MII_ATLX_PSSR_SPD_DPLX_RESOLVED))
2433 		return ATLX_ERR_PHY_RES;
2434 
2435 	switch (phy_data & MII_ATLX_PSSR_SPEED) {
2436 	case MII_ATLX_PSSR_100MBS:
2437 		*speed = SPEED_100;
2438 		break;
2439 	case MII_ATLX_PSSR_10MBS:
2440 		*speed = SPEED_10;
2441 		break;
2442 	default:
2443 		return ATLX_ERR_PHY_SPEED;
2444 	}
2445 
2446 	if (phy_data & MII_ATLX_PSSR_DPLX)
2447 		*duplex = FULL_DUPLEX;
2448 	else
2449 		*duplex = HALF_DUPLEX;
2450 
2451 	return 0;
2452 }
2453 
2454 /*
2455  * Reads the value from a PHY register
2456  * hw - Struct containing variables accessed by shared code
2457  * reg_addr - address of the PHY register to read
2458  */
2459 static s32 atl2_read_phy_reg(struct atl2_hw *hw, u16 reg_addr, u16 *phy_data)
2460 {
2461 	u32 val;
2462 	int i;
2463 
2464 	val = ((u32)(reg_addr & MDIO_REG_ADDR_MASK)) << MDIO_REG_ADDR_SHIFT |
2465 		MDIO_START |
2466 		MDIO_SUP_PREAMBLE |
2467 		MDIO_RW |
2468 		MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;
2469 	ATL2_WRITE_REG(hw, REG_MDIO_CTRL, val);
2470 
2471 	wmb();
2472 
2473 	for (i = 0; i < MDIO_WAIT_TIMES; i++) {
2474 		udelay(2);
2475 		val = ATL2_READ_REG(hw, REG_MDIO_CTRL);
2476 		if (!(val & (MDIO_START | MDIO_BUSY)))
2477 			break;
2478 		wmb();
2479 	}
2480 	if (!(val & (MDIO_START | MDIO_BUSY))) {
2481 		*phy_data = (u16)val;
2482 		return 0;
2483 	}
2484 
2485 	return ATLX_ERR_PHY;
2486 }
2487 
2488 /*
2489  * Writes a value to a PHY register
2490  * hw - Struct containing variables accessed by shared code
2491  * reg_addr - address of the PHY register to write
2492  * data - data to write to the PHY
2493  */
2494 static s32 atl2_write_phy_reg(struct atl2_hw *hw, u32 reg_addr, u16 phy_data)
2495 {
2496 	int i;
2497 	u32 val;
2498 
2499 	val = ((u32)(phy_data & MDIO_DATA_MASK)) << MDIO_DATA_SHIFT |
2500 		(reg_addr & MDIO_REG_ADDR_MASK) << MDIO_REG_ADDR_SHIFT |
2501 		MDIO_SUP_PREAMBLE |
2502 		MDIO_START |
2503 		MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;
2504 	ATL2_WRITE_REG(hw, REG_MDIO_CTRL, val);
2505 
2506 	wmb();
2507 
2508 	for (i = 0; i < MDIO_WAIT_TIMES; i++) {
2509 		udelay(2);
2510 		val = ATL2_READ_REG(hw, REG_MDIO_CTRL);
2511 		if (!(val & (MDIO_START | MDIO_BUSY)))
2512 			break;
2513 
2514 		wmb();
2515 	}
2516 
2517 	if (!(val & (MDIO_START | MDIO_BUSY)))
2518 		return 0;
2519 
2520 	return ATLX_ERR_PHY;
2521 }
2522 
2523 /*
2524  * Configures PHY autoneg and flow control advertisement settings
2525  *
2526  * hw - Struct containing variables accessed by shared code
2527  */
2528 static s32 atl2_phy_setup_autoneg_adv(struct atl2_hw *hw)
2529 {
2530 	s16 mii_autoneg_adv_reg;
2531 
2532 	/* Read the MII Auto-Neg Advertisement Register (Address 4). */
2533 	mii_autoneg_adv_reg = MII_AR_DEFAULT_CAP_MASK;
2534 
2535 	/* Need to parse autoneg_advertised  and set up
2536 	 * the appropriate PHY registers.  First we will parse for
2537 	 * autoneg_advertised software override.  Since we can advertise
2538 	 * a plethora of combinations, we need to check each bit
2539 	 * individually.
2540 	 */
2541 
2542 	/* First we clear all the 10/100 mb speed bits in the Auto-Neg
2543 	 * Advertisement Register (Address 4) and the 1000 mb speed bits in
2544 	 * the  1000Base-T Control Register (Address 9). */
2545 	mii_autoneg_adv_reg &= ~MII_AR_SPEED_MASK;
2546 
2547 	/* Need to parse MediaType and setup the
2548 	 * appropriate PHY registers. */
2549 	switch (hw->MediaType) {
2550 	case MEDIA_TYPE_AUTO_SENSOR:
2551 		mii_autoneg_adv_reg |=
2552 			(MII_AR_10T_HD_CAPS |
2553 			MII_AR_10T_FD_CAPS  |
2554 			MII_AR_100TX_HD_CAPS|
2555 			MII_AR_100TX_FD_CAPS);
2556 		hw->autoneg_advertised =
2557 			ADVERTISE_10_HALF |
2558 			ADVERTISE_10_FULL |
2559 			ADVERTISE_100_HALF|
2560 			ADVERTISE_100_FULL;
2561 		break;
2562 	case MEDIA_TYPE_100M_FULL:
2563 		mii_autoneg_adv_reg |= MII_AR_100TX_FD_CAPS;
2564 		hw->autoneg_advertised = ADVERTISE_100_FULL;
2565 		break;
2566 	case MEDIA_TYPE_100M_HALF:
2567 		mii_autoneg_adv_reg |= MII_AR_100TX_HD_CAPS;
2568 		hw->autoneg_advertised = ADVERTISE_100_HALF;
2569 		break;
2570 	case MEDIA_TYPE_10M_FULL:
2571 		mii_autoneg_adv_reg |= MII_AR_10T_FD_CAPS;
2572 		hw->autoneg_advertised = ADVERTISE_10_FULL;
2573 		break;
2574 	default:
2575 		mii_autoneg_adv_reg |= MII_AR_10T_HD_CAPS;
2576 		hw->autoneg_advertised = ADVERTISE_10_HALF;
2577 		break;
2578 	}
2579 
2580 	/* flow control fixed to enable all */
2581 	mii_autoneg_adv_reg |= (MII_AR_ASM_DIR | MII_AR_PAUSE);
2582 
2583 	hw->mii_autoneg_adv_reg = mii_autoneg_adv_reg;
2584 
2585 	return atl2_write_phy_reg(hw, MII_ADVERTISE, mii_autoneg_adv_reg);
2586 }
2587 
2588 /*
2589  * Resets the PHY and make all config validate
2590  *
2591  * hw - Struct containing variables accessed by shared code
2592  *
2593  * Sets bit 15 and 12 of the MII Control regiser (for F001 bug)
2594  */
2595 static s32 atl2_phy_commit(struct atl2_hw *hw)
2596 {
2597 	s32 ret_val;
2598 	u16 phy_data;
2599 
2600 	phy_data = MII_CR_RESET | MII_CR_AUTO_NEG_EN | MII_CR_RESTART_AUTO_NEG;
2601 	ret_val = atl2_write_phy_reg(hw, MII_BMCR, phy_data);
2602 	if (ret_val) {
2603 		u32 val;
2604 		int i;
2605 		/* pcie serdes link may be down ! */
2606 		for (i = 0; i < 25; i++) {
2607 			msleep(1);
2608 			val = ATL2_READ_REG(hw, REG_MDIO_CTRL);
2609 			if (!(val & (MDIO_START | MDIO_BUSY)))
2610 				break;
2611 		}
2612 
2613 		if (0 != (val & (MDIO_START | MDIO_BUSY))) {
2614 			printk(KERN_ERR "atl2: PCIe link down for at least 25ms !\n");
2615 			return ret_val;
2616 		}
2617 	}
2618 	return 0;
2619 }
2620 
2621 static s32 atl2_phy_init(struct atl2_hw *hw)
2622 {
2623 	s32 ret_val;
2624 	u16 phy_val;
2625 
2626 	if (hw->phy_configured)
2627 		return 0;
2628 
2629 	/* Enable PHY */
2630 	ATL2_WRITE_REGW(hw, REG_PHY_ENABLE, 1);
2631 	ATL2_WRITE_FLUSH(hw);
2632 	msleep(1);
2633 
2634 	/* check if the PHY is in powersaving mode */
2635 	atl2_write_phy_reg(hw, MII_DBG_ADDR, 0);
2636 	atl2_read_phy_reg(hw, MII_DBG_DATA, &phy_val);
2637 
2638 	/* 024E / 124E 0r 0274 / 1274 ? */
2639 	if (phy_val & 0x1000) {
2640 		phy_val &= ~0x1000;
2641 		atl2_write_phy_reg(hw, MII_DBG_DATA, phy_val);
2642 	}
2643 
2644 	msleep(1);
2645 
2646 	/*Enable PHY LinkChange Interrupt */
2647 	ret_val = atl2_write_phy_reg(hw, 18, 0xC00);
2648 	if (ret_val)
2649 		return ret_val;
2650 
2651 	/* setup AutoNeg parameters */
2652 	ret_val = atl2_phy_setup_autoneg_adv(hw);
2653 	if (ret_val)
2654 		return ret_val;
2655 
2656 	/* SW.Reset & En-Auto-Neg to restart Auto-Neg */
2657 	ret_val = atl2_phy_commit(hw);
2658 	if (ret_val)
2659 		return ret_val;
2660 
2661 	hw->phy_configured = true;
2662 
2663 	return ret_val;
2664 }
2665 
2666 static void atl2_set_mac_addr(struct atl2_hw *hw)
2667 {
2668 	u32 value;
2669 	/* 00-0B-6A-F6-00-DC
2670 	 * 0:  6AF600DC   1: 000B
2671 	 * low dword */
2672 	value = (((u32)hw->mac_addr[2]) << 24) |
2673 		(((u32)hw->mac_addr[3]) << 16) |
2674 		(((u32)hw->mac_addr[4]) << 8)  |
2675 		(((u32)hw->mac_addr[5]));
2676 	ATL2_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 0, value);
2677 	/* hight dword */
2678 	value = (((u32)hw->mac_addr[0]) << 8) |
2679 		(((u32)hw->mac_addr[1]));
2680 	ATL2_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 1, value);
2681 }
2682 
2683 /*
2684  * check_eeprom_exist
2685  * return 0 if eeprom exist
2686  */
2687 static int atl2_check_eeprom_exist(struct atl2_hw *hw)
2688 {
2689 	u32 value;
2690 
2691 	value = ATL2_READ_REG(hw, REG_SPI_FLASH_CTRL);
2692 	if (value & SPI_FLASH_CTRL_EN_VPD) {
2693 		value &= ~SPI_FLASH_CTRL_EN_VPD;
2694 		ATL2_WRITE_REG(hw, REG_SPI_FLASH_CTRL, value);
2695 	}
2696 	value = ATL2_READ_REGW(hw, REG_PCIE_CAP_LIST);
2697 	return ((value & 0xFF00) == 0x6C00) ? 0 : 1;
2698 }
2699 
2700 /* FIXME: This doesn't look right. -- CHS */
2701 static bool atl2_write_eeprom(struct atl2_hw *hw, u32 offset, u32 value)
2702 {
2703 	return true;
2704 }
2705 
2706 static bool atl2_read_eeprom(struct atl2_hw *hw, u32 Offset, u32 *pValue)
2707 {
2708 	int i;
2709 	u32    Control;
2710 
2711 	if (Offset & 0x3)
2712 		return false; /* address do not align */
2713 
2714 	ATL2_WRITE_REG(hw, REG_VPD_DATA, 0);
2715 	Control = (Offset & VPD_CAP_VPD_ADDR_MASK) << VPD_CAP_VPD_ADDR_SHIFT;
2716 	ATL2_WRITE_REG(hw, REG_VPD_CAP, Control);
2717 
2718 	for (i = 0; i < 10; i++) {
2719 		msleep(2);
2720 		Control = ATL2_READ_REG(hw, REG_VPD_CAP);
2721 		if (Control & VPD_CAP_VPD_FLAG)
2722 			break;
2723 	}
2724 
2725 	if (Control & VPD_CAP_VPD_FLAG) {
2726 		*pValue = ATL2_READ_REG(hw, REG_VPD_DATA);
2727 		return true;
2728 	}
2729 	return false; /* timeout */
2730 }
2731 
2732 static void atl2_force_ps(struct atl2_hw *hw)
2733 {
2734 	u16 phy_val;
2735 
2736 	atl2_write_phy_reg(hw, MII_DBG_ADDR, 0);
2737 	atl2_read_phy_reg(hw, MII_DBG_DATA, &phy_val);
2738 	atl2_write_phy_reg(hw, MII_DBG_DATA, phy_val | 0x1000);
2739 
2740 	atl2_write_phy_reg(hw, MII_DBG_ADDR, 2);
2741 	atl2_write_phy_reg(hw, MII_DBG_DATA, 0x3000);
2742 	atl2_write_phy_reg(hw, MII_DBG_ADDR, 3);
2743 	atl2_write_phy_reg(hw, MII_DBG_DATA, 0);
2744 }
2745 
2746 /* This is the only thing that needs to be changed to adjust the
2747  * maximum number of ports that the driver can manage.
2748  */
2749 #define ATL2_MAX_NIC 4
2750 
2751 #define OPTION_UNSET    -1
2752 #define OPTION_DISABLED 0
2753 #define OPTION_ENABLED  1
2754 
2755 /* All parameters are treated the same, as an integer array of values.
2756  * This macro just reduces the need to repeat the same declaration code
2757  * over and over (plus this helps to avoid typo bugs).
2758  */
2759 #define ATL2_PARAM_INIT {[0 ... ATL2_MAX_NIC] = OPTION_UNSET}
2760 #ifndef module_param_array
2761 /* Module Parameters are always initialized to -1, so that the driver
2762  * can tell the difference between no user specified value or the
2763  * user asking for the default value.
2764  * The true default values are loaded in when atl2_check_options is called.
2765  *
2766  * This is a GCC extension to ANSI C.
2767  * See the item "Labeled Elements in Initializers" in the section
2768  * "Extensions to the C Language Family" of the GCC documentation.
2769  */
2770 
2771 #define ATL2_PARAM(X, desc) \
2772     static const int X[ATL2_MAX_NIC + 1] = ATL2_PARAM_INIT; \
2773     MODULE_PARM(X, "1-" __MODULE_STRING(ATL2_MAX_NIC) "i"); \
2774     MODULE_PARM_DESC(X, desc);
2775 #else
2776 #define ATL2_PARAM(X, desc) \
2777     static int X[ATL2_MAX_NIC+1] = ATL2_PARAM_INIT; \
2778     static unsigned int num_##X; \
2779     module_param_array_named(X, X, int, &num_##X, 0); \
2780     MODULE_PARM_DESC(X, desc);
2781 #endif
2782 
2783 /*
2784  * Transmit Memory Size
2785  * Valid Range: 64-2048
2786  * Default Value: 128
2787  */
2788 #define ATL2_MIN_TX_MEMSIZE		4	/* 4KB */
2789 #define ATL2_MAX_TX_MEMSIZE		64	/* 64KB */
2790 #define ATL2_DEFAULT_TX_MEMSIZE		8	/* 8KB */
2791 ATL2_PARAM(TxMemSize, "Bytes of Transmit Memory");
2792 
2793 /*
2794  * Receive Memory Block Count
2795  * Valid Range: 16-512
2796  * Default Value: 128
2797  */
2798 #define ATL2_MIN_RXD_COUNT		16
2799 #define ATL2_MAX_RXD_COUNT		512
2800 #define ATL2_DEFAULT_RXD_COUNT		64
2801 ATL2_PARAM(RxMemBlock, "Number of receive memory block");
2802 
2803 /*
2804  * User Specified MediaType Override
2805  *
2806  * Valid Range: 0-5
2807  *  - 0    - auto-negotiate at all supported speeds
2808  *  - 1    - only link at 1000Mbps Full Duplex
2809  *  - 2    - only link at 100Mbps Full Duplex
2810  *  - 3    - only link at 100Mbps Half Duplex
2811  *  - 4    - only link at 10Mbps Full Duplex
2812  *  - 5    - only link at 10Mbps Half Duplex
2813  * Default Value: 0
2814  */
2815 ATL2_PARAM(MediaType, "MediaType Select");
2816 
2817 /*
2818  * Interrupt Moderate Timer in units of 2048 ns (~2 us)
2819  * Valid Range: 10-65535
2820  * Default Value: 45000(90ms)
2821  */
2822 #define INT_MOD_DEFAULT_CNT	100 /* 200us */
2823 #define INT_MOD_MAX_CNT		65000
2824 #define INT_MOD_MIN_CNT		50
2825 ATL2_PARAM(IntModTimer, "Interrupt Moderator Timer");
2826 
2827 /*
2828  * FlashVendor
2829  * Valid Range: 0-2
2830  * 0 - Atmel
2831  * 1 - SST
2832  * 2 - ST
2833  */
2834 ATL2_PARAM(FlashVendor, "SPI Flash Vendor");
2835 
2836 #define AUTONEG_ADV_DEFAULT	0x2F
2837 #define AUTONEG_ADV_MASK	0x2F
2838 #define FLOW_CONTROL_DEFAULT	FLOW_CONTROL_FULL
2839 
2840 #define FLASH_VENDOR_DEFAULT	0
2841 #define FLASH_VENDOR_MIN	0
2842 #define FLASH_VENDOR_MAX	2
2843 
2844 struct atl2_option {
2845 	enum { enable_option, range_option, list_option } type;
2846 	char *name;
2847 	char *err;
2848 	int  def;
2849 	union {
2850 		struct { /* range_option info */
2851 			int min;
2852 			int max;
2853 		} r;
2854 		struct { /* list_option info */
2855 			int nr;
2856 			struct atl2_opt_list { int i; char *str; } *p;
2857 		} l;
2858 	} arg;
2859 };
2860 
2861 static int atl2_validate_option(int *value, struct atl2_option *opt)
2862 {
2863 	int i;
2864 	struct atl2_opt_list *ent;
2865 
2866 	if (*value == OPTION_UNSET) {
2867 		*value = opt->def;
2868 		return 0;
2869 	}
2870 
2871 	switch (opt->type) {
2872 	case enable_option:
2873 		switch (*value) {
2874 		case OPTION_ENABLED:
2875 			printk(KERN_INFO "%s Enabled\n", opt->name);
2876 			return 0;
2877 		case OPTION_DISABLED:
2878 			printk(KERN_INFO "%s Disabled\n", opt->name);
2879 			return 0;
2880 		}
2881 		break;
2882 	case range_option:
2883 		if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
2884 			printk(KERN_INFO "%s set to %i\n", opt->name, *value);
2885 			return 0;
2886 		}
2887 		break;
2888 	case list_option:
2889 		for (i = 0; i < opt->arg.l.nr; i++) {
2890 			ent = &opt->arg.l.p[i];
2891 			if (*value == ent->i) {
2892 				if (ent->str[0] != '\0')
2893 					printk(KERN_INFO "%s\n", ent->str);
2894 				return 0;
2895 			}
2896 		}
2897 		break;
2898 	default:
2899 		BUG();
2900 	}
2901 
2902 	printk(KERN_INFO "Invalid %s specified (%i) %s\n",
2903 		opt->name, *value, opt->err);
2904 	*value = opt->def;
2905 	return -1;
2906 }
2907 
2908 /**
2909  * atl2_check_options - Range Checking for Command Line Parameters
2910  * @adapter: board private structure
2911  *
2912  * This routine checks all command line parameters for valid user
2913  * input.  If an invalid value is given, or if no user specified
2914  * value exists, a default value is used.  The final value is stored
2915  * in a variable in the adapter structure.
2916  */
2917 static void atl2_check_options(struct atl2_adapter *adapter)
2918 {
2919 	int val;
2920 	struct atl2_option opt;
2921 	int bd = adapter->bd_number;
2922 	if (bd >= ATL2_MAX_NIC) {
2923 		printk(KERN_NOTICE "Warning: no configuration for board #%i\n",
2924 			bd);
2925 		printk(KERN_NOTICE "Using defaults for all values\n");
2926 #ifndef module_param_array
2927 		bd = ATL2_MAX_NIC;
2928 #endif
2929 	}
2930 
2931 	/* Bytes of Transmit Memory */
2932 	opt.type = range_option;
2933 	opt.name = "Bytes of Transmit Memory";
2934 	opt.err = "using default of " __MODULE_STRING(ATL2_DEFAULT_TX_MEMSIZE);
2935 	opt.def = ATL2_DEFAULT_TX_MEMSIZE;
2936 	opt.arg.r.min = ATL2_MIN_TX_MEMSIZE;
2937 	opt.arg.r.max = ATL2_MAX_TX_MEMSIZE;
2938 #ifdef module_param_array
2939 	if (num_TxMemSize > bd) {
2940 #endif
2941 		val = TxMemSize[bd];
2942 		atl2_validate_option(&val, &opt);
2943 		adapter->txd_ring_size = ((u32) val) * 1024;
2944 #ifdef module_param_array
2945 	} else
2946 		adapter->txd_ring_size = ((u32)opt.def) * 1024;
2947 #endif
2948 	/* txs ring size: */
2949 	adapter->txs_ring_size = adapter->txd_ring_size / 128;
2950 	if (adapter->txs_ring_size > 160)
2951 		adapter->txs_ring_size = 160;
2952 
2953 	/* Receive Memory Block Count */
2954 	opt.type = range_option;
2955 	opt.name = "Number of receive memory block";
2956 	opt.err = "using default of " __MODULE_STRING(ATL2_DEFAULT_RXD_COUNT);
2957 	opt.def = ATL2_DEFAULT_RXD_COUNT;
2958 	opt.arg.r.min = ATL2_MIN_RXD_COUNT;
2959 	opt.arg.r.max = ATL2_MAX_RXD_COUNT;
2960 #ifdef module_param_array
2961 	if (num_RxMemBlock > bd) {
2962 #endif
2963 		val = RxMemBlock[bd];
2964 		atl2_validate_option(&val, &opt);
2965 		adapter->rxd_ring_size = (u32)val;
2966 		/* FIXME */
2967 		/* ((u16)val)&~1; */	/* even number */
2968 #ifdef module_param_array
2969 	} else
2970 		adapter->rxd_ring_size = (u32)opt.def;
2971 #endif
2972 	/* init RXD Flow control value */
2973 	adapter->hw.fc_rxd_hi = (adapter->rxd_ring_size / 8) * 7;
2974 	adapter->hw.fc_rxd_lo = (ATL2_MIN_RXD_COUNT / 8) >
2975 		(adapter->rxd_ring_size / 12) ? (ATL2_MIN_RXD_COUNT / 8) :
2976 		(adapter->rxd_ring_size / 12);
2977 
2978 	/* Interrupt Moderate Timer */
2979 	opt.type = range_option;
2980 	opt.name = "Interrupt Moderate Timer";
2981 	opt.err = "using default of " __MODULE_STRING(INT_MOD_DEFAULT_CNT);
2982 	opt.def = INT_MOD_DEFAULT_CNT;
2983 	opt.arg.r.min = INT_MOD_MIN_CNT;
2984 	opt.arg.r.max = INT_MOD_MAX_CNT;
2985 #ifdef module_param_array
2986 	if (num_IntModTimer > bd) {
2987 #endif
2988 		val = IntModTimer[bd];
2989 		atl2_validate_option(&val, &opt);
2990 		adapter->imt = (u16) val;
2991 #ifdef module_param_array
2992 	} else
2993 		adapter->imt = (u16)(opt.def);
2994 #endif
2995 	/* Flash Vendor */
2996 	opt.type = range_option;
2997 	opt.name = "SPI Flash Vendor";
2998 	opt.err = "using default of " __MODULE_STRING(FLASH_VENDOR_DEFAULT);
2999 	opt.def = FLASH_VENDOR_DEFAULT;
3000 	opt.arg.r.min = FLASH_VENDOR_MIN;
3001 	opt.arg.r.max = FLASH_VENDOR_MAX;
3002 #ifdef module_param_array
3003 	if (num_FlashVendor > bd) {
3004 #endif
3005 		val = FlashVendor[bd];
3006 		atl2_validate_option(&val, &opt);
3007 		adapter->hw.flash_vendor = (u8) val;
3008 #ifdef module_param_array
3009 	} else
3010 		adapter->hw.flash_vendor = (u8)(opt.def);
3011 #endif
3012 	/* MediaType */
3013 	opt.type = range_option;
3014 	opt.name = "Speed/Duplex Selection";
3015 	opt.err = "using default of " __MODULE_STRING(MEDIA_TYPE_AUTO_SENSOR);
3016 	opt.def = MEDIA_TYPE_AUTO_SENSOR;
3017 	opt.arg.r.min = MEDIA_TYPE_AUTO_SENSOR;
3018 	opt.arg.r.max = MEDIA_TYPE_10M_HALF;
3019 #ifdef module_param_array
3020 	if (num_MediaType > bd) {
3021 #endif
3022 		val = MediaType[bd];
3023 		atl2_validate_option(&val, &opt);
3024 		adapter->hw.MediaType = (u16) val;
3025 #ifdef module_param_array
3026 	} else
3027 		adapter->hw.MediaType = (u16)(opt.def);
3028 #endif
3029 }
3030