xref: /openbmc/linux/drivers/net/usb/ax88179_178a.c (revision f35e839a)
1 /*
2  * ASIX AX88179/178A USB 3.0/2.0 to Gigabit Ethernet Devices
3  *
4  * Copyright (C) 2011-2013 ASIX
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version 2
9  * of the License, or (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
19  */
20 
21 #include <linux/module.h>
22 #include <linux/etherdevice.h>
23 #include <linux/mii.h>
24 #include <linux/usb.h>
25 #include <linux/crc32.h>
26 #include <linux/usb/usbnet.h>
27 
28 #define AX88179_PHY_ID				0x03
29 #define AX_EEPROM_LEN				0x100
30 #define AX88179_EEPROM_MAGIC			0x17900b95
31 #define AX_MCAST_FLTSIZE			8
32 #define AX_MAX_MCAST				64
33 #define AX_INT_PPLS_LINK			((u32)BIT(16))
34 #define AX_RXHDR_L4_TYPE_MASK			0x1c
35 #define AX_RXHDR_L4_TYPE_UDP			4
36 #define AX_RXHDR_L4_TYPE_TCP			16
37 #define AX_RXHDR_L3CSUM_ERR			2
38 #define AX_RXHDR_L4CSUM_ERR			1
39 #define AX_RXHDR_CRC_ERR			((u32)BIT(31))
40 #define AX_RXHDR_DROP_ERR			((u32)BIT(30))
41 #define AX_ACCESS_MAC				0x01
42 #define AX_ACCESS_PHY				0x02
43 #define AX_ACCESS_EEPROM			0x04
44 #define AX_ACCESS_EFUS				0x05
45 #define AX_PAUSE_WATERLVL_HIGH			0x54
46 #define AX_PAUSE_WATERLVL_LOW			0x55
47 
48 #define PHYSICAL_LINK_STATUS			0x02
49 	#define	AX_USB_SS		0x04
50 	#define	AX_USB_HS		0x02
51 
52 #define GENERAL_STATUS				0x03
53 /* Check AX88179 version. UA1:Bit2 = 0,  UA2:Bit2 = 1 */
54 	#define	AX_SECLD		0x04
55 
56 #define AX_SROM_ADDR				0x07
57 #define AX_SROM_CMD				0x0a
58 	#define EEP_RD			0x04
59 	#define EEP_BUSY		0x10
60 
61 #define AX_SROM_DATA_LOW			0x08
62 #define AX_SROM_DATA_HIGH			0x09
63 
64 #define AX_RX_CTL				0x0b
65 	#define AX_RX_CTL_DROPCRCERR	0x0100
66 	#define AX_RX_CTL_IPE		0x0200
67 	#define AX_RX_CTL_START		0x0080
68 	#define AX_RX_CTL_AP		0x0020
69 	#define AX_RX_CTL_AM		0x0010
70 	#define AX_RX_CTL_AB		0x0008
71 	#define AX_RX_CTL_AMALL		0x0002
72 	#define AX_RX_CTL_PRO		0x0001
73 	#define AX_RX_CTL_STOP		0x0000
74 
75 #define AX_NODE_ID				0x10
76 #define AX_MULFLTARY				0x16
77 
78 #define AX_MEDIUM_STATUS_MODE			0x22
79 	#define AX_MEDIUM_GIGAMODE	0x01
80 	#define AX_MEDIUM_FULL_DUPLEX	0x02
81 	#define AX_MEDIUM_ALWAYS_ONE	0x04
82 	#define AX_MEDIUM_EN_125MHZ	0x08
83 	#define AX_MEDIUM_RXFLOW_CTRLEN	0x10
84 	#define AX_MEDIUM_TXFLOW_CTRLEN	0x20
85 	#define AX_MEDIUM_RECEIVE_EN	0x100
86 	#define AX_MEDIUM_PS		0x200
87 	#define AX_MEDIUM_JUMBO_EN	0x8040
88 
89 #define AX_MONITOR_MOD				0x24
90 	#define AX_MONITOR_MODE_RWLC	0x02
91 	#define AX_MONITOR_MODE_RWMP	0x04
92 	#define AX_MONITOR_MODE_PMEPOL	0x20
93 	#define AX_MONITOR_MODE_PMETYPE	0x40
94 
95 #define AX_GPIO_CTRL				0x25
96 	#define AX_GPIO_CTRL_GPIO3EN	0x80
97 	#define AX_GPIO_CTRL_GPIO2EN	0x40
98 	#define AX_GPIO_CTRL_GPIO1EN	0x20
99 
100 #define AX_PHYPWR_RSTCTL			0x26
101 	#define AX_PHYPWR_RSTCTL_BZ	0x0010
102 	#define AX_PHYPWR_RSTCTL_IPRL	0x0020
103 	#define AX_PHYPWR_RSTCTL_AT	0x1000
104 
105 #define AX_RX_BULKIN_QCTRL			0x2e
106 #define AX_CLK_SELECT				0x33
107 	#define AX_CLK_SELECT_BCS	0x01
108 	#define AX_CLK_SELECT_ACS	0x02
109 	#define AX_CLK_SELECT_ULR	0x08
110 
111 #define AX_RXCOE_CTL				0x34
112 	#define AX_RXCOE_IP		0x01
113 	#define AX_RXCOE_TCP		0x02
114 	#define AX_RXCOE_UDP		0x04
115 	#define AX_RXCOE_TCPV6		0x20
116 	#define AX_RXCOE_UDPV6		0x40
117 
118 #define AX_TXCOE_CTL				0x35
119 	#define AX_TXCOE_IP		0x01
120 	#define AX_TXCOE_TCP		0x02
121 	#define AX_TXCOE_UDP		0x04
122 	#define AX_TXCOE_TCPV6		0x20
123 	#define AX_TXCOE_UDPV6		0x40
124 
125 #define AX_LEDCTRL				0x73
126 
127 #define GMII_PHY_PHYSR				0x11
128 	#define GMII_PHY_PHYSR_SMASK	0xc000
129 	#define GMII_PHY_PHYSR_GIGA	0x8000
130 	#define GMII_PHY_PHYSR_100	0x4000
131 	#define GMII_PHY_PHYSR_FULL	0x2000
132 	#define GMII_PHY_PHYSR_LINK	0x400
133 
134 #define GMII_LED_ACT				0x1a
135 	#define	GMII_LED_ACTIVE_MASK	0xff8f
136 	#define	GMII_LED0_ACTIVE	BIT(4)
137 	#define	GMII_LED1_ACTIVE	BIT(5)
138 	#define	GMII_LED2_ACTIVE	BIT(6)
139 
140 #define GMII_LED_LINK				0x1c
141 	#define	GMII_LED_LINK_MASK	0xf888
142 	#define	GMII_LED0_LINK_10	BIT(0)
143 	#define	GMII_LED0_LINK_100	BIT(1)
144 	#define	GMII_LED0_LINK_1000	BIT(2)
145 	#define	GMII_LED1_LINK_10	BIT(4)
146 	#define	GMII_LED1_LINK_100	BIT(5)
147 	#define	GMII_LED1_LINK_1000	BIT(6)
148 	#define	GMII_LED2_LINK_10	BIT(8)
149 	#define	GMII_LED2_LINK_100	BIT(9)
150 	#define	GMII_LED2_LINK_1000	BIT(10)
151 	#define	LED0_ACTIVE		BIT(0)
152 	#define	LED0_LINK_10		BIT(1)
153 	#define	LED0_LINK_100		BIT(2)
154 	#define	LED0_LINK_1000		BIT(3)
155 	#define	LED0_FD			BIT(4)
156 	#define	LED0_USB3_MASK		0x001f
157 	#define	LED1_ACTIVE		BIT(5)
158 	#define	LED1_LINK_10		BIT(6)
159 	#define	LED1_LINK_100		BIT(7)
160 	#define	LED1_LINK_1000		BIT(8)
161 	#define	LED1_FD			BIT(9)
162 	#define	LED1_USB3_MASK		0x03e0
163 	#define	LED2_ACTIVE		BIT(10)
164 	#define	LED2_LINK_1000		BIT(13)
165 	#define	LED2_LINK_100		BIT(12)
166 	#define	LED2_LINK_10		BIT(11)
167 	#define	LED2_FD			BIT(14)
168 	#define	LED_VALID		BIT(15)
169 	#define	LED2_USB3_MASK		0x7c00
170 
171 #define GMII_PHYPAGE				0x1e
172 #define GMII_PHY_PAGE_SELECT			0x1f
173 	#define GMII_PHY_PGSEL_EXT	0x0007
174 	#define GMII_PHY_PGSEL_PAGE0	0x0000
175 
176 struct ax88179_data {
177 	u16 rxctl;
178 	u16 reserved;
179 };
180 
181 struct ax88179_int_data {
182 	__le32 intdata1;
183 	__le32 intdata2;
184 };
185 
186 static const struct {
187 	unsigned char ctrl, timer_l, timer_h, size, ifg;
188 } AX88179_BULKIN_SIZE[] =	{
189 	{7, 0x4f, 0,	0x12, 0xff},
190 	{7, 0x20, 3,	0x16, 0xff},
191 	{7, 0xae, 7,	0x18, 0xff},
192 	{7, 0xcc, 0x4c, 0x18, 8},
193 };
194 
195 static int __ax88179_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
196 			      u16 size, void *data, int in_pm)
197 {
198 	int ret;
199 	int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
200 
201 	BUG_ON(!dev);
202 
203 	if (!in_pm)
204 		fn = usbnet_read_cmd;
205 	else
206 		fn = usbnet_read_cmd_nopm;
207 
208 	ret = fn(dev, cmd, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
209 		 value, index, data, size);
210 
211 	if (unlikely(ret < 0))
212 		netdev_warn(dev->net, "Failed to read reg index 0x%04x: %d\n",
213 			    index, ret);
214 
215 	return ret;
216 }
217 
218 static int __ax88179_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
219 			       u16 size, void *data, int in_pm)
220 {
221 	int ret;
222 	int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
223 
224 	BUG_ON(!dev);
225 
226 	if (!in_pm)
227 		fn = usbnet_write_cmd;
228 	else
229 		fn = usbnet_write_cmd_nopm;
230 
231 	ret = fn(dev, cmd, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
232 		 value, index, data, size);
233 
234 	if (unlikely(ret < 0))
235 		netdev_warn(dev->net, "Failed to write reg index 0x%04x: %d\n",
236 			    index, ret);
237 
238 	return ret;
239 }
240 
241 static void ax88179_write_cmd_async(struct usbnet *dev, u8 cmd, u16 value,
242 				    u16 index, u16 size, void *data)
243 {
244 	u16 buf;
245 
246 	if (2 == size) {
247 		buf = *((u16 *)data);
248 		cpu_to_le16s(&buf);
249 		usbnet_write_cmd_async(dev, cmd, USB_DIR_OUT | USB_TYPE_VENDOR |
250 				       USB_RECIP_DEVICE, value, index, &buf,
251 				       size);
252 	} else {
253 		usbnet_write_cmd_async(dev, cmd, USB_DIR_OUT | USB_TYPE_VENDOR |
254 				       USB_RECIP_DEVICE, value, index, data,
255 				       size);
256 	}
257 }
258 
259 static int ax88179_read_cmd_nopm(struct usbnet *dev, u8 cmd, u16 value,
260 				 u16 index, u16 size, void *data)
261 {
262 	int ret;
263 
264 	if (2 == size) {
265 		u16 buf;
266 		ret = __ax88179_read_cmd(dev, cmd, value, index, size, &buf, 1);
267 		le16_to_cpus(&buf);
268 		*((u16 *)data) = buf;
269 	} else if (4 == size) {
270 		u32 buf;
271 		ret = __ax88179_read_cmd(dev, cmd, value, index, size, &buf, 1);
272 		le32_to_cpus(&buf);
273 		*((u32 *)data) = buf;
274 	} else {
275 		ret = __ax88179_read_cmd(dev, cmd, value, index, size, data, 1);
276 	}
277 
278 	return ret;
279 }
280 
281 static int ax88179_write_cmd_nopm(struct usbnet *dev, u8 cmd, u16 value,
282 				  u16 index, u16 size, void *data)
283 {
284 	int ret;
285 
286 	if (2 == size) {
287 		u16 buf;
288 		buf = *((u16 *)data);
289 		cpu_to_le16s(&buf);
290 		ret = __ax88179_write_cmd(dev, cmd, value, index,
291 					  size, &buf, 1);
292 	} else {
293 		ret = __ax88179_write_cmd(dev, cmd, value, index,
294 					  size, data, 1);
295 	}
296 
297 	return ret;
298 }
299 
300 static int ax88179_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
301 			    u16 size, void *data)
302 {
303 	int ret;
304 
305 	if (2 == size) {
306 		u16 buf;
307 		ret = __ax88179_read_cmd(dev, cmd, value, index, size, &buf, 0);
308 		le16_to_cpus(&buf);
309 		*((u16 *)data) = buf;
310 	} else if (4 == size) {
311 		u32 buf;
312 		ret = __ax88179_read_cmd(dev, cmd, value, index, size, &buf, 0);
313 		le32_to_cpus(&buf);
314 		*((u32 *)data) = buf;
315 	} else {
316 		ret = __ax88179_read_cmd(dev, cmd, value, index, size, data, 0);
317 	}
318 
319 	return ret;
320 }
321 
322 static int ax88179_write_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
323 			     u16 size, void *data)
324 {
325 	int ret;
326 
327 	if (2 == size) {
328 		u16 buf;
329 		buf = *((u16 *)data);
330 		cpu_to_le16s(&buf);
331 		ret = __ax88179_write_cmd(dev, cmd, value, index,
332 					  size, &buf, 0);
333 	} else {
334 		ret = __ax88179_write_cmd(dev, cmd, value, index,
335 					  size, data, 0);
336 	}
337 
338 	return ret;
339 }
340 
341 static void ax88179_status(struct usbnet *dev, struct urb *urb)
342 {
343 	struct ax88179_int_data *event;
344 	u32 link;
345 
346 	if (urb->actual_length < 8)
347 		return;
348 
349 	event = urb->transfer_buffer;
350 	le32_to_cpus((void *)&event->intdata1);
351 
352 	link = (((__force u32)event->intdata1) & AX_INT_PPLS_LINK) >> 16;
353 
354 	if (netif_carrier_ok(dev->net) != link) {
355 		usbnet_link_change(dev, link, 1);
356 		netdev_info(dev->net, "ax88179 - Link status is: %d\n", link);
357 	}
358 }
359 
360 static int ax88179_mdio_read(struct net_device *netdev, int phy_id, int loc)
361 {
362 	struct usbnet *dev = netdev_priv(netdev);
363 	u16 res;
364 
365 	ax88179_read_cmd(dev, AX_ACCESS_PHY, phy_id, (__u16)loc, 2, &res);
366 	return res;
367 }
368 
369 static void ax88179_mdio_write(struct net_device *netdev, int phy_id, int loc,
370 			       int val)
371 {
372 	struct usbnet *dev = netdev_priv(netdev);
373 	u16 res = (u16) val;
374 
375 	ax88179_write_cmd(dev, AX_ACCESS_PHY, phy_id, (__u16)loc, 2, &res);
376 }
377 
378 static int ax88179_suspend(struct usb_interface *intf, pm_message_t message)
379 {
380 	struct usbnet *dev = usb_get_intfdata(intf);
381 	u16 tmp16;
382 	u8 tmp8;
383 
384 	usbnet_suspend(intf, message);
385 
386 	/* Disable RX path */
387 	ax88179_read_cmd_nopm(dev, AX_ACCESS_MAC, AX_MEDIUM_STATUS_MODE,
388 			      2, 2, &tmp16);
389 	tmp16 &= ~AX_MEDIUM_RECEIVE_EN;
390 	ax88179_write_cmd_nopm(dev, AX_ACCESS_MAC, AX_MEDIUM_STATUS_MODE,
391 			       2, 2, &tmp16);
392 
393 	/* Force bulk-in zero length */
394 	ax88179_read_cmd_nopm(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL,
395 			      2, 2, &tmp16);
396 
397 	tmp16 |= AX_PHYPWR_RSTCTL_BZ | AX_PHYPWR_RSTCTL_IPRL;
398 	ax88179_write_cmd_nopm(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL,
399 			       2, 2, &tmp16);
400 
401 	/* change clock */
402 	tmp8 = 0;
403 	ax88179_write_cmd_nopm(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, &tmp8);
404 
405 	/* Configure RX control register => stop operation */
406 	tmp16 = AX_RX_CTL_STOP;
407 	ax88179_write_cmd_nopm(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2, &tmp16);
408 
409 	return 0;
410 }
411 
412 /* This function is used to enable the autodetach function. */
413 /* This function is determined by offset 0x43 of EEPROM */
414 static int ax88179_auto_detach(struct usbnet *dev, int in_pm)
415 {
416 	u16 tmp16;
417 	u8 tmp8;
418 	int (*fnr)(struct usbnet *, u8, u16, u16, u16, void *);
419 	int (*fnw)(struct usbnet *, u8, u16, u16, u16, void *);
420 
421 	if (!in_pm) {
422 		fnr = ax88179_read_cmd;
423 		fnw = ax88179_write_cmd;
424 	} else {
425 		fnr = ax88179_read_cmd_nopm;
426 		fnw = ax88179_write_cmd_nopm;
427 	}
428 
429 	if (fnr(dev, AX_ACCESS_EEPROM, 0x43, 1, 2, &tmp16) < 0)
430 		return 0;
431 
432 	if ((tmp16 == 0xFFFF) || (!(tmp16 & 0x0100)))
433 		return 0;
434 
435 	/* Enable Auto Detach bit */
436 	tmp8 = 0;
437 	fnr(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, &tmp8);
438 	tmp8 |= AX_CLK_SELECT_ULR;
439 	fnw(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, &tmp8);
440 
441 	fnr(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, &tmp16);
442 	tmp16 |= AX_PHYPWR_RSTCTL_AT;
443 	fnw(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, &tmp16);
444 
445 	return 0;
446 }
447 
448 static int ax88179_resume(struct usb_interface *intf)
449 {
450 	struct usbnet *dev = usb_get_intfdata(intf);
451 	u16 tmp16;
452 	u8 tmp8;
453 
454 	usbnet_link_change(dev, 0, 0);
455 
456 	/* Power up ethernet PHY */
457 	tmp16 = 0;
458 	ax88179_write_cmd_nopm(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL,
459 			       2, 2, &tmp16);
460 	udelay(1000);
461 
462 	tmp16 = AX_PHYPWR_RSTCTL_IPRL;
463 	ax88179_write_cmd_nopm(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL,
464 			       2, 2, &tmp16);
465 	msleep(200);
466 
467 	/* Ethernet PHY Auto Detach*/
468 	ax88179_auto_detach(dev, 1);
469 
470 	/* Enable clock */
471 	ax88179_read_cmd_nopm(dev, AX_ACCESS_MAC,  AX_CLK_SELECT, 1, 1, &tmp8);
472 	tmp8 |= AX_CLK_SELECT_ACS | AX_CLK_SELECT_BCS;
473 	ax88179_write_cmd_nopm(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, &tmp8);
474 	msleep(100);
475 
476 	/* Configure RX control register => start operation */
477 	tmp16 = AX_RX_CTL_DROPCRCERR | AX_RX_CTL_IPE | AX_RX_CTL_START |
478 		AX_RX_CTL_AP | AX_RX_CTL_AMALL | AX_RX_CTL_AB;
479 	ax88179_write_cmd_nopm(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2, &tmp16);
480 
481 	return usbnet_resume(intf);
482 }
483 
484 static void
485 ax88179_get_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
486 {
487 	struct usbnet *dev = netdev_priv(net);
488 	u8 opt;
489 
490 	if (ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_MONITOR_MOD,
491 			     1, 1, &opt) < 0) {
492 		wolinfo->supported = 0;
493 		wolinfo->wolopts = 0;
494 		return;
495 	}
496 
497 	wolinfo->supported = WAKE_PHY | WAKE_MAGIC;
498 	wolinfo->wolopts = 0;
499 	if (opt & AX_MONITOR_MODE_RWLC)
500 		wolinfo->wolopts |= WAKE_PHY;
501 	if (opt & AX_MONITOR_MODE_RWMP)
502 		wolinfo->wolopts |= WAKE_MAGIC;
503 }
504 
505 static int
506 ax88179_set_wol(struct net_device *net, struct ethtool_wolinfo *wolinfo)
507 {
508 	struct usbnet *dev = netdev_priv(net);
509 	u8 opt = 0;
510 
511 	if (wolinfo->wolopts & WAKE_PHY)
512 		opt |= AX_MONITOR_MODE_RWLC;
513 	if (wolinfo->wolopts & WAKE_MAGIC)
514 		opt |= AX_MONITOR_MODE_RWMP;
515 
516 	if (ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_MONITOR_MOD,
517 			      1, 1, &opt) < 0)
518 		return -EINVAL;
519 
520 	return 0;
521 }
522 
523 static int ax88179_get_eeprom_len(struct net_device *net)
524 {
525 	return AX_EEPROM_LEN;
526 }
527 
528 static int
529 ax88179_get_eeprom(struct net_device *net, struct ethtool_eeprom *eeprom,
530 		   u8 *data)
531 {
532 	struct usbnet *dev = netdev_priv(net);
533 	u16 *eeprom_buff;
534 	int first_word, last_word;
535 	int i, ret;
536 
537 	if (eeprom->len == 0)
538 		return -EINVAL;
539 
540 	eeprom->magic = AX88179_EEPROM_MAGIC;
541 
542 	first_word = eeprom->offset >> 1;
543 	last_word = (eeprom->offset + eeprom->len - 1) >> 1;
544 	eeprom_buff = kmalloc(sizeof(u16) * (last_word - first_word + 1),
545 			      GFP_KERNEL);
546 	if (!eeprom_buff)
547 		return -ENOMEM;
548 
549 	/* ax88179/178A returns 2 bytes from eeprom on read */
550 	for (i = first_word; i <= last_word; i++) {
551 		ret = __ax88179_read_cmd(dev, AX_ACCESS_EEPROM, i, 1, 2,
552 					 &eeprom_buff[i - first_word],
553 					 0);
554 		if (ret < 0) {
555 			kfree(eeprom_buff);
556 			return -EIO;
557 		}
558 	}
559 
560 	memcpy(data, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
561 	kfree(eeprom_buff);
562 	return 0;
563 }
564 
565 static int ax88179_get_settings(struct net_device *net, struct ethtool_cmd *cmd)
566 {
567 	struct usbnet *dev = netdev_priv(net);
568 	return mii_ethtool_gset(&dev->mii, cmd);
569 }
570 
571 static int ax88179_set_settings(struct net_device *net, struct ethtool_cmd *cmd)
572 {
573 	struct usbnet *dev = netdev_priv(net);
574 	return mii_ethtool_sset(&dev->mii, cmd);
575 }
576 
577 
578 static int ax88179_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
579 {
580 	struct usbnet *dev = netdev_priv(net);
581 	return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
582 }
583 
584 static const struct ethtool_ops ax88179_ethtool_ops = {
585 	.get_link		= ethtool_op_get_link,
586 	.get_msglevel		= usbnet_get_msglevel,
587 	.set_msglevel		= usbnet_set_msglevel,
588 	.get_wol		= ax88179_get_wol,
589 	.set_wol		= ax88179_set_wol,
590 	.get_eeprom_len		= ax88179_get_eeprom_len,
591 	.get_eeprom		= ax88179_get_eeprom,
592 	.get_settings		= ax88179_get_settings,
593 	.set_settings		= ax88179_set_settings,
594 	.nway_reset		= usbnet_nway_reset,
595 };
596 
597 static void ax88179_set_multicast(struct net_device *net)
598 {
599 	struct usbnet *dev = netdev_priv(net);
600 	struct ax88179_data *data = (struct ax88179_data *)dev->data;
601 	u8 *m_filter = ((u8 *)dev->data) + 12;
602 
603 	data->rxctl = (AX_RX_CTL_START | AX_RX_CTL_AB | AX_RX_CTL_IPE);
604 
605 	if (net->flags & IFF_PROMISC) {
606 		data->rxctl |= AX_RX_CTL_PRO;
607 	} else if (net->flags & IFF_ALLMULTI ||
608 		   netdev_mc_count(net) > AX_MAX_MCAST) {
609 		data->rxctl |= AX_RX_CTL_AMALL;
610 	} else if (netdev_mc_empty(net)) {
611 		/* just broadcast and directed */
612 	} else {
613 		/* We use the 20 byte dev->data for our 8 byte filter buffer
614 		 * to avoid allocating memory that is tricky to free later
615 		 */
616 		u32 crc_bits;
617 		struct netdev_hw_addr *ha;
618 
619 		memset(m_filter, 0, AX_MCAST_FLTSIZE);
620 
621 		netdev_for_each_mc_addr(ha, net) {
622 			crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26;
623 			*(m_filter + (crc_bits >> 3)) |= (1 << (crc_bits & 7));
624 		}
625 
626 		ax88179_write_cmd_async(dev, AX_ACCESS_MAC, AX_MULFLTARY,
627 					AX_MCAST_FLTSIZE, AX_MCAST_FLTSIZE,
628 					m_filter);
629 
630 		data->rxctl |= AX_RX_CTL_AM;
631 	}
632 
633 	ax88179_write_cmd_async(dev, AX_ACCESS_MAC, AX_RX_CTL,
634 				2, 2, &data->rxctl);
635 }
636 
637 static int
638 ax88179_set_features(struct net_device *net, netdev_features_t features)
639 {
640 	u8 tmp;
641 	struct usbnet *dev = netdev_priv(net);
642 	netdev_features_t changed = net->features ^ features;
643 
644 	if (changed & NETIF_F_IP_CSUM) {
645 		ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_TXCOE_CTL, 1, 1, &tmp);
646 		tmp ^= AX_TXCOE_TCP | AX_TXCOE_UDP;
647 		ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_TXCOE_CTL, 1, 1, &tmp);
648 	}
649 
650 	if (changed & NETIF_F_IPV6_CSUM) {
651 		ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_TXCOE_CTL, 1, 1, &tmp);
652 		tmp ^= AX_TXCOE_TCPV6 | AX_TXCOE_UDPV6;
653 		ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_TXCOE_CTL, 1, 1, &tmp);
654 	}
655 
656 	if (changed & NETIF_F_RXCSUM) {
657 		ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_RXCOE_CTL, 1, 1, &tmp);
658 		tmp ^= AX_RXCOE_IP | AX_RXCOE_TCP | AX_RXCOE_UDP |
659 		       AX_RXCOE_TCPV6 | AX_RXCOE_UDPV6;
660 		ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RXCOE_CTL, 1, 1, &tmp);
661 	}
662 
663 	return 0;
664 }
665 
666 static int ax88179_change_mtu(struct net_device *net, int new_mtu)
667 {
668 	struct usbnet *dev = netdev_priv(net);
669 	u16 tmp16;
670 
671 	if (new_mtu <= 0 || new_mtu > 4088)
672 		return -EINVAL;
673 
674 	net->mtu = new_mtu;
675 	dev->hard_mtu = net->mtu + net->hard_header_len;
676 
677 	if (net->mtu > 1500) {
678 		ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_MEDIUM_STATUS_MODE,
679 				 2, 2, &tmp16);
680 		tmp16 |= AX_MEDIUM_JUMBO_EN;
681 		ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_MEDIUM_STATUS_MODE,
682 				  2, 2, &tmp16);
683 	} else {
684 		ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_MEDIUM_STATUS_MODE,
685 				 2, 2, &tmp16);
686 		tmp16 &= ~AX_MEDIUM_JUMBO_EN;
687 		ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_MEDIUM_STATUS_MODE,
688 				  2, 2, &tmp16);
689 	}
690 
691 	return 0;
692 }
693 
694 static int ax88179_set_mac_addr(struct net_device *net, void *p)
695 {
696 	struct usbnet *dev = netdev_priv(net);
697 	struct sockaddr *addr = p;
698 
699 	if (netif_running(net))
700 		return -EBUSY;
701 	if (!is_valid_ether_addr(addr->sa_data))
702 		return -EADDRNOTAVAIL;
703 
704 	memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
705 
706 	/* Set the MAC address */
707 	return ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_NODE_ID, ETH_ALEN,
708 				 ETH_ALEN, net->dev_addr);
709 }
710 
711 static const struct net_device_ops ax88179_netdev_ops = {
712 	.ndo_open		= usbnet_open,
713 	.ndo_stop		= usbnet_stop,
714 	.ndo_start_xmit		= usbnet_start_xmit,
715 	.ndo_tx_timeout		= usbnet_tx_timeout,
716 	.ndo_change_mtu		= ax88179_change_mtu,
717 	.ndo_set_mac_address	= ax88179_set_mac_addr,
718 	.ndo_validate_addr	= eth_validate_addr,
719 	.ndo_do_ioctl		= ax88179_ioctl,
720 	.ndo_set_rx_mode	= ax88179_set_multicast,
721 	.ndo_set_features	= ax88179_set_features,
722 };
723 
724 static int ax88179_check_eeprom(struct usbnet *dev)
725 {
726 	u8 i, buf, eeprom[20];
727 	u16 csum, delay = HZ / 10;
728 	unsigned long jtimeout;
729 
730 	/* Read EEPROM content */
731 	for (i = 0; i < 6; i++) {
732 		buf = i;
733 		if (ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_SROM_ADDR,
734 				      1, 1, &buf) < 0)
735 			return -EINVAL;
736 
737 		buf = EEP_RD;
738 		if (ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_SROM_CMD,
739 				      1, 1, &buf) < 0)
740 			return -EINVAL;
741 
742 		jtimeout = jiffies + delay;
743 		do {
744 			ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_SROM_CMD,
745 					 1, 1, &buf);
746 
747 			if (time_after(jiffies, jtimeout))
748 				return -EINVAL;
749 
750 		} while (buf & EEP_BUSY);
751 
752 		__ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_SROM_DATA_LOW,
753 				   2, 2, &eeprom[i * 2], 0);
754 
755 		if ((i == 0) && (eeprom[0] == 0xFF))
756 			return -EINVAL;
757 	}
758 
759 	csum = eeprom[6] + eeprom[7] + eeprom[8] + eeprom[9];
760 	csum = (csum >> 8) + (csum & 0xff);
761 	if ((csum + eeprom[10]) != 0xff)
762 		return -EINVAL;
763 
764 	return 0;
765 }
766 
767 static int ax88179_check_efuse(struct usbnet *dev, u16 *ledmode)
768 {
769 	u8	i;
770 	u8	efuse[64];
771 	u16	csum = 0;
772 
773 	if (ax88179_read_cmd(dev, AX_ACCESS_EFUS, 0, 64, 64, efuse) < 0)
774 		return -EINVAL;
775 
776 	if (*efuse == 0xFF)
777 		return -EINVAL;
778 
779 	for (i = 0; i < 64; i++)
780 		csum = csum + efuse[i];
781 
782 	while (csum > 255)
783 		csum = (csum & 0x00FF) + ((csum >> 8) & 0x00FF);
784 
785 	if (csum != 0xFF)
786 		return -EINVAL;
787 
788 	*ledmode = (efuse[51] << 8) | efuse[52];
789 
790 	return 0;
791 }
792 
793 static int ax88179_convert_old_led(struct usbnet *dev, u16 *ledvalue)
794 {
795 	u16 led;
796 
797 	/* Loaded the old eFuse LED Mode */
798 	if (ax88179_read_cmd(dev, AX_ACCESS_EEPROM, 0x3C, 1, 2, &led) < 0)
799 		return -EINVAL;
800 
801 	led >>= 8;
802 	switch (led) {
803 	case 0xFF:
804 		led = LED0_ACTIVE | LED1_LINK_10 | LED1_LINK_100 |
805 		      LED1_LINK_1000 | LED2_ACTIVE | LED2_LINK_10 |
806 		      LED2_LINK_100 | LED2_LINK_1000 | LED_VALID;
807 		break;
808 	case 0xFE:
809 		led = LED0_ACTIVE | LED1_LINK_1000 | LED2_LINK_100 | LED_VALID;
810 		break;
811 	case 0xFD:
812 		led = LED0_ACTIVE | LED1_LINK_1000 | LED2_LINK_100 |
813 		      LED2_LINK_10 | LED_VALID;
814 		break;
815 	case 0xFC:
816 		led = LED0_ACTIVE | LED1_ACTIVE | LED1_LINK_1000 | LED2_ACTIVE |
817 		      LED2_LINK_100 | LED2_LINK_10 | LED_VALID;
818 		break;
819 	default:
820 		led = LED0_ACTIVE | LED1_LINK_10 | LED1_LINK_100 |
821 		      LED1_LINK_1000 | LED2_ACTIVE | LED2_LINK_10 |
822 		      LED2_LINK_100 | LED2_LINK_1000 | LED_VALID;
823 		break;
824 	}
825 
826 	*ledvalue = led;
827 
828 	return 0;
829 }
830 
831 static int ax88179_led_setting(struct usbnet *dev)
832 {
833 	u8 ledfd, value = 0;
834 	u16 tmp, ledact, ledlink, ledvalue = 0, delay = HZ / 10;
835 	unsigned long jtimeout;
836 
837 	/* Check AX88179 version. UA1 or UA2*/
838 	ax88179_read_cmd(dev, AX_ACCESS_MAC, GENERAL_STATUS, 1, 1, &value);
839 
840 	if (!(value & AX_SECLD)) {	/* UA1 */
841 		value = AX_GPIO_CTRL_GPIO3EN | AX_GPIO_CTRL_GPIO2EN |
842 			AX_GPIO_CTRL_GPIO1EN;
843 		if (ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_GPIO_CTRL,
844 				      1, 1, &value) < 0)
845 			return -EINVAL;
846 	}
847 
848 	/* Check EEPROM */
849 	if (!ax88179_check_eeprom(dev)) {
850 		value = 0x42;
851 		if (ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_SROM_ADDR,
852 				      1, 1, &value) < 0)
853 			return -EINVAL;
854 
855 		value = EEP_RD;
856 		if (ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_SROM_CMD,
857 				      1, 1, &value) < 0)
858 			return -EINVAL;
859 
860 		jtimeout = jiffies + delay;
861 		do {
862 			ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_SROM_CMD,
863 					 1, 1, &value);
864 
865 			if (time_after(jiffies, jtimeout))
866 				return -EINVAL;
867 
868 		} while (value & EEP_BUSY);
869 
870 		ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_SROM_DATA_HIGH,
871 				 1, 1, &value);
872 		ledvalue = (value << 8);
873 
874 		ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_SROM_DATA_LOW,
875 				 1, 1, &value);
876 		ledvalue |= value;
877 
878 		/* load internal ROM for defaule setting */
879 		if ((ledvalue == 0xFFFF) || ((ledvalue & LED_VALID) == 0))
880 			ax88179_convert_old_led(dev, &ledvalue);
881 
882 	} else if (!ax88179_check_efuse(dev, &ledvalue)) {
883 		if ((ledvalue == 0xFFFF) || ((ledvalue & LED_VALID) == 0))
884 			ax88179_convert_old_led(dev, &ledvalue);
885 	} else {
886 		ax88179_convert_old_led(dev, &ledvalue);
887 	}
888 
889 	tmp = GMII_PHY_PGSEL_EXT;
890 	ax88179_write_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
891 			  GMII_PHY_PAGE_SELECT, 2, &tmp);
892 
893 	tmp = 0x2c;
894 	ax88179_write_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
895 			  GMII_PHYPAGE, 2, &tmp);
896 
897 	ax88179_read_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
898 			 GMII_LED_ACT, 2, &ledact);
899 
900 	ax88179_read_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
901 			 GMII_LED_LINK, 2, &ledlink);
902 
903 	ledact &= GMII_LED_ACTIVE_MASK;
904 	ledlink &= GMII_LED_LINK_MASK;
905 
906 	if (ledvalue & LED0_ACTIVE)
907 		ledact |= GMII_LED0_ACTIVE;
908 
909 	if (ledvalue & LED1_ACTIVE)
910 		ledact |= GMII_LED1_ACTIVE;
911 
912 	if (ledvalue & LED2_ACTIVE)
913 		ledact |= GMII_LED2_ACTIVE;
914 
915 	if (ledvalue & LED0_LINK_10)
916 		ledlink |= GMII_LED0_LINK_10;
917 
918 	if (ledvalue & LED1_LINK_10)
919 		ledlink |= GMII_LED1_LINK_10;
920 
921 	if (ledvalue & LED2_LINK_10)
922 		ledlink |= GMII_LED2_LINK_10;
923 
924 	if (ledvalue & LED0_LINK_100)
925 		ledlink |= GMII_LED0_LINK_100;
926 
927 	if (ledvalue & LED1_LINK_100)
928 		ledlink |= GMII_LED1_LINK_100;
929 
930 	if (ledvalue & LED2_LINK_100)
931 		ledlink |= GMII_LED2_LINK_100;
932 
933 	if (ledvalue & LED0_LINK_1000)
934 		ledlink |= GMII_LED0_LINK_1000;
935 
936 	if (ledvalue & LED1_LINK_1000)
937 		ledlink |= GMII_LED1_LINK_1000;
938 
939 	if (ledvalue & LED2_LINK_1000)
940 		ledlink |= GMII_LED2_LINK_1000;
941 
942 	tmp = ledact;
943 	ax88179_write_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
944 			  GMII_LED_ACT, 2, &tmp);
945 
946 	tmp = ledlink;
947 	ax88179_write_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
948 			  GMII_LED_LINK, 2, &tmp);
949 
950 	tmp = GMII_PHY_PGSEL_PAGE0;
951 	ax88179_write_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
952 			  GMII_PHY_PAGE_SELECT, 2, &tmp);
953 
954 	/* LED full duplex setting */
955 	ledfd = 0;
956 	if (ledvalue & LED0_FD)
957 		ledfd |= 0x01;
958 	else if ((ledvalue & LED0_USB3_MASK) == 0)
959 		ledfd |= 0x02;
960 
961 	if (ledvalue & LED1_FD)
962 		ledfd |= 0x04;
963 	else if ((ledvalue & LED1_USB3_MASK) == 0)
964 		ledfd |= 0x08;
965 
966 	if (ledvalue & LED2_FD)
967 		ledfd |= 0x10;
968 	else if ((ledvalue & LED2_USB3_MASK) == 0)
969 		ledfd |= 0x20;
970 
971 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_LEDCTRL, 1, 1, &ledfd);
972 
973 	return 0;
974 }
975 
976 static int ax88179_bind(struct usbnet *dev, struct usb_interface *intf)
977 {
978 	u8 buf[5];
979 	u16 *tmp16;
980 	u8 *tmp;
981 	struct ax88179_data *ax179_data = (struct ax88179_data *)dev->data;
982 
983 	usbnet_get_endpoints(dev, intf);
984 
985 	tmp16 = (u16 *)buf;
986 	tmp = (u8 *)buf;
987 
988 	memset(ax179_data, 0, sizeof(*ax179_data));
989 
990 	/* Power up ethernet PHY */
991 	*tmp16 = 0;
992 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp16);
993 	*tmp16 = AX_PHYPWR_RSTCTL_IPRL;
994 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp16);
995 	msleep(200);
996 
997 	*tmp = AX_CLK_SELECT_ACS | AX_CLK_SELECT_BCS;
998 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, tmp);
999 	msleep(100);
1000 
1001 	ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_NODE_ID, ETH_ALEN,
1002 			 ETH_ALEN, dev->net->dev_addr);
1003 	memcpy(dev->net->perm_addr, dev->net->dev_addr, ETH_ALEN);
1004 
1005 	/* RX bulk configuration */
1006 	memcpy(tmp, &AX88179_BULKIN_SIZE[0], 5);
1007 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_BULKIN_QCTRL, 5, 5, tmp);
1008 
1009 	dev->rx_urb_size = 1024 * 20;
1010 
1011 	*tmp = 0x34;
1012 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PAUSE_WATERLVL_LOW, 1, 1, tmp);
1013 
1014 	*tmp = 0x52;
1015 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PAUSE_WATERLVL_HIGH,
1016 			  1, 1, tmp);
1017 
1018 	dev->net->netdev_ops = &ax88179_netdev_ops;
1019 	dev->net->ethtool_ops = &ax88179_ethtool_ops;
1020 	dev->net->needed_headroom = 8;
1021 
1022 	/* Initialize MII structure */
1023 	dev->mii.dev = dev->net;
1024 	dev->mii.mdio_read = ax88179_mdio_read;
1025 	dev->mii.mdio_write = ax88179_mdio_write;
1026 	dev->mii.phy_id_mask = 0xff;
1027 	dev->mii.reg_num_mask = 0xff;
1028 	dev->mii.phy_id = 0x03;
1029 	dev->mii.supports_gmii = 1;
1030 
1031 	dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1032 			      NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_TSO;
1033 
1034 	dev->net->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1035 				 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_TSO;
1036 
1037 	/* Enable checksum offload */
1038 	*tmp = AX_RXCOE_IP | AX_RXCOE_TCP | AX_RXCOE_UDP |
1039 	       AX_RXCOE_TCPV6 | AX_RXCOE_UDPV6;
1040 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RXCOE_CTL, 1, 1, tmp);
1041 
1042 	*tmp = AX_TXCOE_IP | AX_TXCOE_TCP | AX_TXCOE_UDP |
1043 	       AX_TXCOE_TCPV6 | AX_TXCOE_UDPV6;
1044 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_TXCOE_CTL, 1, 1, tmp);
1045 
1046 	/* Configure RX control register => start operation */
1047 	*tmp16 = AX_RX_CTL_DROPCRCERR | AX_RX_CTL_IPE | AX_RX_CTL_START |
1048 		 AX_RX_CTL_AP | AX_RX_CTL_AMALL | AX_RX_CTL_AB;
1049 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2, tmp16);
1050 
1051 	*tmp = AX_MONITOR_MODE_PMETYPE | AX_MONITOR_MODE_PMEPOL |
1052 	       AX_MONITOR_MODE_RWMP;
1053 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_MONITOR_MOD, 1, 1, tmp);
1054 
1055 	/* Configure default medium type => giga */
1056 	*tmp16 = AX_MEDIUM_RECEIVE_EN | AX_MEDIUM_TXFLOW_CTRLEN |
1057 		 AX_MEDIUM_RXFLOW_CTRLEN | AX_MEDIUM_ALWAYS_ONE |
1058 		 AX_MEDIUM_FULL_DUPLEX | AX_MEDIUM_GIGAMODE;
1059 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_MEDIUM_STATUS_MODE,
1060 			  2, 2, tmp16);
1061 
1062 	ax88179_led_setting(dev);
1063 
1064 	/* Restart autoneg */
1065 	mii_nway_restart(&dev->mii);
1066 
1067 	usbnet_link_change(dev, 0, 0);
1068 
1069 	return 0;
1070 }
1071 
1072 static void ax88179_unbind(struct usbnet *dev, struct usb_interface *intf)
1073 {
1074 	u16 tmp16;
1075 
1076 	/* Configure RX control register => stop operation */
1077 	tmp16 = AX_RX_CTL_STOP;
1078 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2, &tmp16);
1079 
1080 	tmp16 = 0;
1081 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, &tmp16);
1082 
1083 	/* Power down ethernet PHY */
1084 	tmp16 = 0;
1085 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, &tmp16);
1086 }
1087 
1088 static void
1089 ax88179_rx_checksum(struct sk_buff *skb, u32 *pkt_hdr)
1090 {
1091 	skb->ip_summed = CHECKSUM_NONE;
1092 
1093 	/* checksum error bit is set */
1094 	if ((*pkt_hdr & AX_RXHDR_L3CSUM_ERR) ||
1095 	    (*pkt_hdr & AX_RXHDR_L4CSUM_ERR))
1096 		return;
1097 
1098 	/* It must be a TCP or UDP packet with a valid checksum */
1099 	if (((*pkt_hdr & AX_RXHDR_L4_TYPE_MASK) == AX_RXHDR_L4_TYPE_TCP) ||
1100 	    ((*pkt_hdr & AX_RXHDR_L4_TYPE_MASK) == AX_RXHDR_L4_TYPE_UDP))
1101 		skb->ip_summed = CHECKSUM_UNNECESSARY;
1102 }
1103 
1104 static int ax88179_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1105 {
1106 	struct sk_buff *ax_skb;
1107 	int pkt_cnt;
1108 	u32 rx_hdr;
1109 	u16 hdr_off;
1110 	u32 *pkt_hdr;
1111 
1112 	skb_trim(skb, skb->len - 4);
1113 	memcpy(&rx_hdr, skb_tail_pointer(skb), 4);
1114 	le32_to_cpus(&rx_hdr);
1115 
1116 	pkt_cnt = (u16)rx_hdr;
1117 	hdr_off = (u16)(rx_hdr >> 16);
1118 	pkt_hdr = (u32 *)(skb->data + hdr_off);
1119 
1120 	while (pkt_cnt--) {
1121 		u16 pkt_len;
1122 
1123 		le32_to_cpus(pkt_hdr);
1124 		pkt_len = (*pkt_hdr >> 16) & 0x1fff;
1125 
1126 		/* Check CRC or runt packet */
1127 		if ((*pkt_hdr & AX_RXHDR_CRC_ERR) ||
1128 		    (*pkt_hdr & AX_RXHDR_DROP_ERR)) {
1129 			skb_pull(skb, (pkt_len + 7) & 0xFFF8);
1130 			pkt_hdr++;
1131 			continue;
1132 		}
1133 
1134 		if (pkt_cnt == 0) {
1135 			/* Skip IP alignment psudo header */
1136 			skb_pull(skb, 2);
1137 			skb->len = pkt_len;
1138 			skb_set_tail_pointer(skb, pkt_len);
1139 			skb->truesize = pkt_len + sizeof(struct sk_buff);
1140 			ax88179_rx_checksum(skb, pkt_hdr);
1141 			return 1;
1142 		}
1143 
1144 		ax_skb = skb_clone(skb, GFP_ATOMIC);
1145 		if (ax_skb) {
1146 			ax_skb->len = pkt_len;
1147 			ax_skb->data = skb->data + 2;
1148 			skb_set_tail_pointer(ax_skb, pkt_len);
1149 			ax_skb->truesize = pkt_len + sizeof(struct sk_buff);
1150 			ax88179_rx_checksum(ax_skb, pkt_hdr);
1151 			usbnet_skb_return(dev, ax_skb);
1152 		} else {
1153 			return 0;
1154 		}
1155 
1156 		skb_pull(skb, (pkt_len + 7) & 0xFFF8);
1157 		pkt_hdr++;
1158 	}
1159 	return 1;
1160 }
1161 
1162 static struct sk_buff *
1163 ax88179_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
1164 {
1165 	u32 tx_hdr1, tx_hdr2;
1166 	int frame_size = dev->maxpacket;
1167 	int mss = skb_shinfo(skb)->gso_size;
1168 	int headroom;
1169 	int tailroom;
1170 
1171 	tx_hdr1 = skb->len;
1172 	tx_hdr2 = mss;
1173 	if (((skb->len + 8) % frame_size) == 0)
1174 		tx_hdr2 |= 0x80008000;	/* Enable padding */
1175 
1176 	skb_linearize(skb);
1177 	headroom = skb_headroom(skb);
1178 	tailroom = skb_tailroom(skb);
1179 
1180 	if (!skb_header_cloned(skb) &&
1181 	    !skb_cloned(skb) &&
1182 	    (headroom + tailroom) >= 8) {
1183 		if (headroom < 8) {
1184 			skb->data = memmove(skb->head + 8, skb->data, skb->len);
1185 			skb_set_tail_pointer(skb, skb->len);
1186 		}
1187 	} else {
1188 		struct sk_buff *skb2;
1189 
1190 		skb2 = skb_copy_expand(skb, 8, 0, flags);
1191 		dev_kfree_skb_any(skb);
1192 		skb = skb2;
1193 		if (!skb)
1194 			return NULL;
1195 	}
1196 
1197 	skb_push(skb, 4);
1198 	cpu_to_le32s(&tx_hdr2);
1199 	skb_copy_to_linear_data(skb, &tx_hdr2, 4);
1200 
1201 	skb_push(skb, 4);
1202 	cpu_to_le32s(&tx_hdr1);
1203 	skb_copy_to_linear_data(skb, &tx_hdr1, 4);
1204 
1205 	return skb;
1206 }
1207 
1208 static int ax88179_link_reset(struct usbnet *dev)
1209 {
1210 	struct ax88179_data *ax179_data = (struct ax88179_data *)dev->data;
1211 	u8 tmp[5], link_sts;
1212 	u16 mode, tmp16, delay = HZ / 10;
1213 	u32 tmp32 = 0x40000000;
1214 	unsigned long jtimeout;
1215 
1216 	jtimeout = jiffies + delay;
1217 	while (tmp32 & 0x40000000) {
1218 		mode = 0;
1219 		ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2, &mode);
1220 		ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2,
1221 				  &ax179_data->rxctl);
1222 
1223 		/*link up, check the usb device control TX FIFO full or empty*/
1224 		ax88179_read_cmd(dev, 0x81, 0x8c, 0, 4, &tmp32);
1225 
1226 		if (time_after(jiffies, jtimeout))
1227 			return 0;
1228 	}
1229 
1230 	mode = AX_MEDIUM_RECEIVE_EN | AX_MEDIUM_TXFLOW_CTRLEN |
1231 	       AX_MEDIUM_RXFLOW_CTRLEN | AX_MEDIUM_ALWAYS_ONE;
1232 
1233 	ax88179_read_cmd(dev, AX_ACCESS_MAC, PHYSICAL_LINK_STATUS,
1234 			 1, 1, &link_sts);
1235 
1236 	ax88179_read_cmd(dev, AX_ACCESS_PHY, AX88179_PHY_ID,
1237 			 GMII_PHY_PHYSR, 2, &tmp16);
1238 
1239 	if (!(tmp16 & GMII_PHY_PHYSR_LINK)) {
1240 		return 0;
1241 	} else if (GMII_PHY_PHYSR_GIGA == (tmp16 & GMII_PHY_PHYSR_SMASK)) {
1242 		mode |= AX_MEDIUM_GIGAMODE | AX_MEDIUM_EN_125MHZ;
1243 		if (dev->net->mtu > 1500)
1244 			mode |= AX_MEDIUM_JUMBO_EN;
1245 
1246 		if (link_sts & AX_USB_SS)
1247 			memcpy(tmp, &AX88179_BULKIN_SIZE[0], 5);
1248 		else if (link_sts & AX_USB_HS)
1249 			memcpy(tmp, &AX88179_BULKIN_SIZE[1], 5);
1250 		else
1251 			memcpy(tmp, &AX88179_BULKIN_SIZE[3], 5);
1252 	} else if (GMII_PHY_PHYSR_100 == (tmp16 & GMII_PHY_PHYSR_SMASK)) {
1253 		mode |= AX_MEDIUM_PS;
1254 
1255 		if (link_sts & (AX_USB_SS | AX_USB_HS))
1256 			memcpy(tmp, &AX88179_BULKIN_SIZE[2], 5);
1257 		else
1258 			memcpy(tmp, &AX88179_BULKIN_SIZE[3], 5);
1259 	} else {
1260 		memcpy(tmp, &AX88179_BULKIN_SIZE[3], 5);
1261 	}
1262 
1263 	/* RX bulk configuration */
1264 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_BULKIN_QCTRL, 5, 5, tmp);
1265 
1266 	dev->rx_urb_size = (1024 * (tmp[3] + 2));
1267 
1268 	if (tmp16 & GMII_PHY_PHYSR_FULL)
1269 		mode |= AX_MEDIUM_FULL_DUPLEX;
1270 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_MEDIUM_STATUS_MODE,
1271 			  2, 2, &mode);
1272 
1273 	netif_carrier_on(dev->net);
1274 
1275 	return 0;
1276 }
1277 
1278 static int ax88179_reset(struct usbnet *dev)
1279 {
1280 	u8 buf[5];
1281 	u16 *tmp16;
1282 	u8 *tmp;
1283 
1284 	tmp16 = (u16 *)buf;
1285 	tmp = (u8 *)buf;
1286 
1287 	/* Power up ethernet PHY */
1288 	*tmp16 = 0;
1289 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp16);
1290 
1291 	*tmp16 = AX_PHYPWR_RSTCTL_IPRL;
1292 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL, 2, 2, tmp16);
1293 	msleep(200);
1294 
1295 	*tmp = AX_CLK_SELECT_ACS | AX_CLK_SELECT_BCS;
1296 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, tmp);
1297 	msleep(100);
1298 
1299 	/* Ethernet PHY Auto Detach*/
1300 	ax88179_auto_detach(dev, 0);
1301 
1302 	ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_NODE_ID, ETH_ALEN, ETH_ALEN,
1303 			 dev->net->dev_addr);
1304 	memcpy(dev->net->perm_addr, dev->net->dev_addr, ETH_ALEN);
1305 
1306 	/* RX bulk configuration */
1307 	memcpy(tmp, &AX88179_BULKIN_SIZE[0], 5);
1308 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_BULKIN_QCTRL, 5, 5, tmp);
1309 
1310 	dev->rx_urb_size = 1024 * 20;
1311 
1312 	*tmp = 0x34;
1313 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PAUSE_WATERLVL_LOW, 1, 1, tmp);
1314 
1315 	*tmp = 0x52;
1316 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PAUSE_WATERLVL_HIGH,
1317 			  1, 1, tmp);
1318 
1319 	dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1320 			      NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_TSO;
1321 
1322 	dev->net->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1323 				 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_TSO;
1324 
1325 	/* Enable checksum offload */
1326 	*tmp = AX_RXCOE_IP | AX_RXCOE_TCP | AX_RXCOE_UDP |
1327 	       AX_RXCOE_TCPV6 | AX_RXCOE_UDPV6;
1328 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RXCOE_CTL, 1, 1, tmp);
1329 
1330 	*tmp = AX_TXCOE_IP | AX_TXCOE_TCP | AX_TXCOE_UDP |
1331 	       AX_TXCOE_TCPV6 | AX_TXCOE_UDPV6;
1332 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_TXCOE_CTL, 1, 1, tmp);
1333 
1334 	/* Configure RX control register => start operation */
1335 	*tmp16 = AX_RX_CTL_DROPCRCERR | AX_RX_CTL_IPE | AX_RX_CTL_START |
1336 		 AX_RX_CTL_AP | AX_RX_CTL_AMALL | AX_RX_CTL_AB;
1337 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2, tmp16);
1338 
1339 	*tmp = AX_MONITOR_MODE_PMETYPE | AX_MONITOR_MODE_PMEPOL |
1340 	       AX_MONITOR_MODE_RWMP;
1341 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_MONITOR_MOD, 1, 1, tmp);
1342 
1343 	/* Configure default medium type => giga */
1344 	*tmp16 = AX_MEDIUM_RECEIVE_EN | AX_MEDIUM_TXFLOW_CTRLEN |
1345 		 AX_MEDIUM_RXFLOW_CTRLEN | AX_MEDIUM_ALWAYS_ONE |
1346 		 AX_MEDIUM_FULL_DUPLEX | AX_MEDIUM_GIGAMODE;
1347 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_MEDIUM_STATUS_MODE,
1348 			  2, 2, tmp16);
1349 
1350 	ax88179_led_setting(dev);
1351 
1352 	/* Restart autoneg */
1353 	mii_nway_restart(&dev->mii);
1354 
1355 	usbnet_link_change(dev, 0, 0);
1356 
1357 	return 0;
1358 }
1359 
1360 static int ax88179_stop(struct usbnet *dev)
1361 {
1362 	u16 tmp16;
1363 
1364 	ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_MEDIUM_STATUS_MODE,
1365 			 2, 2, &tmp16);
1366 	tmp16 &= ~AX_MEDIUM_RECEIVE_EN;
1367 	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_MEDIUM_STATUS_MODE,
1368 			  2, 2, &tmp16);
1369 
1370 	return 0;
1371 }
1372 
1373 static const struct driver_info ax88179_info = {
1374 	.description = "ASIX AX88179 USB 3.0 Gigibit Ethernet",
1375 	.bind = ax88179_bind,
1376 	.unbind = ax88179_unbind,
1377 	.status = ax88179_status,
1378 	.link_reset = ax88179_link_reset,
1379 	.reset = ax88179_reset,
1380 	.stop = ax88179_stop,
1381 	.flags = FLAG_ETHER | FLAG_FRAMING_AX,
1382 	.rx_fixup = ax88179_rx_fixup,
1383 	.tx_fixup = ax88179_tx_fixup,
1384 };
1385 
1386 static const struct driver_info ax88178a_info = {
1387 	.description = "ASIX AX88178A USB 2.0 Gigibit Ethernet",
1388 	.bind = ax88179_bind,
1389 	.unbind = ax88179_unbind,
1390 	.status = ax88179_status,
1391 	.link_reset = ax88179_link_reset,
1392 	.reset = ax88179_reset,
1393 	.stop = ax88179_stop,
1394 	.flags = FLAG_ETHER | FLAG_FRAMING_AX,
1395 	.rx_fixup = ax88179_rx_fixup,
1396 	.tx_fixup = ax88179_tx_fixup,
1397 };
1398 
1399 static const struct driver_info sitecom_info = {
1400 	.description = "Sitecom USB 3.0 to Gigabit Adapter",
1401 	.bind = ax88179_bind,
1402 	.unbind = ax88179_unbind,
1403 	.status = ax88179_status,
1404 	.link_reset = ax88179_link_reset,
1405 	.reset = ax88179_reset,
1406 	.stop = ax88179_stop,
1407 	.flags = FLAG_ETHER | FLAG_FRAMING_AX,
1408 	.rx_fixup = ax88179_rx_fixup,
1409 	.tx_fixup = ax88179_tx_fixup,
1410 };
1411 
1412 static const struct usb_device_id products[] = {
1413 {
1414 	/* ASIX AX88179 10/100/1000 */
1415 	USB_DEVICE(0x0b95, 0x1790),
1416 	.driver_info = (unsigned long)&ax88179_info,
1417 }, {
1418 	/* ASIX AX88178A 10/100/1000 */
1419 	USB_DEVICE(0x0b95, 0x178a),
1420 	.driver_info = (unsigned long)&ax88178a_info,
1421 }, {
1422 	/* Sitecom USB 3.0 to Gigabit Adapter */
1423 	USB_DEVICE(0x0df6, 0x0072),
1424 	.driver_info = (unsigned long) &sitecom_info,
1425 },
1426 	{ },
1427 };
1428 MODULE_DEVICE_TABLE(usb, products);
1429 
1430 static struct usb_driver ax88179_178a_driver = {
1431 	.name =		"ax88179_178a",
1432 	.id_table =	products,
1433 	.probe =	usbnet_probe,
1434 	.suspend =	ax88179_suspend,
1435 	.resume =	ax88179_resume,
1436 	.disconnect =	usbnet_disconnect,
1437 	.supports_autosuspend = 1,
1438 	.disable_hub_initiated_lpm = 1,
1439 };
1440 
1441 module_usb_driver(ax88179_178a_driver);
1442 
1443 MODULE_DESCRIPTION("ASIX AX88179/178A based USB 3.0/2.0 Gigabit Ethernet Devices");
1444 MODULE_LICENSE("GPL");
1445