1 // SPDX-License-Identifier: GPL-2.0
2 /*  SuperH Ethernet device driver
3  *
4  *  Copyright (C) 2014 Renesas Electronics Corporation
5  *  Copyright (C) 2006-2012 Nobuhiro Iwamatsu
6  *  Copyright (C) 2008-2014 Renesas Solutions Corp.
7  *  Copyright (C) 2013-2017 Cogent Embedded, Inc.
8  *  Copyright (C) 2014 Codethink Limited
9  */
10 
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/spinlock.h>
14 #include <linux/interrupt.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/etherdevice.h>
17 #include <linux/delay.h>
18 #include <linux/platform_device.h>
19 #include <linux/mdio-bitbang.h>
20 #include <linux/netdevice.h>
21 #include <linux/of.h>
22 #include <linux/of_device.h>
23 #include <linux/of_irq.h>
24 #include <linux/of_net.h>
25 #include <linux/phy.h>
26 #include <linux/cache.h>
27 #include <linux/io.h>
28 #include <linux/pm_runtime.h>
29 #include <linux/slab.h>
30 #include <linux/ethtool.h>
31 #include <linux/if_vlan.h>
32 #include <linux/sh_eth.h>
33 #include <linux/of_mdio.h>
34 
35 #include "sh_eth.h"
36 
37 #define SH_ETH_DEF_MSG_ENABLE \
38 		(NETIF_MSG_LINK	| \
39 		NETIF_MSG_TIMER	| \
40 		NETIF_MSG_RX_ERR| \
41 		NETIF_MSG_TX_ERR)
42 
43 #define SH_ETH_OFFSET_INVALID	((u16)~0)
44 
45 #define SH_ETH_OFFSET_DEFAULTS			\
46 	[0 ... SH_ETH_MAX_REGISTER_OFFSET - 1] = SH_ETH_OFFSET_INVALID
47 
48 /* use some intentionally tricky logic here to initialize the whole struct to
49  * 0xffff, but then override certain fields, requiring us to indicate that we
50  * "know" that there are overrides in this structure, and we'll need to disable
51  * that warning from W=1 builds. GCC has supported this option since 4.2.X, but
52  * the macros available to do this only define GCC 8.
53  */
54 __diag_push();
55 __diag_ignore(GCC, 8, "-Woverride-init",
56 	      "logic to initialize all and then override some is OK");
57 static const u16 sh_eth_offset_gigabit[SH_ETH_MAX_REGISTER_OFFSET] = {
58 	SH_ETH_OFFSET_DEFAULTS,
59 
60 	[EDSR]		= 0x0000,
61 	[EDMR]		= 0x0400,
62 	[EDTRR]		= 0x0408,
63 	[EDRRR]		= 0x0410,
64 	[EESR]		= 0x0428,
65 	[EESIPR]	= 0x0430,
66 	[TDLAR]		= 0x0010,
67 	[TDFAR]		= 0x0014,
68 	[TDFXR]		= 0x0018,
69 	[TDFFR]		= 0x001c,
70 	[RDLAR]		= 0x0030,
71 	[RDFAR]		= 0x0034,
72 	[RDFXR]		= 0x0038,
73 	[RDFFR]		= 0x003c,
74 	[TRSCER]	= 0x0438,
75 	[RMFCR]		= 0x0440,
76 	[TFTR]		= 0x0448,
77 	[FDR]		= 0x0450,
78 	[RMCR]		= 0x0458,
79 	[RPADIR]	= 0x0460,
80 	[FCFTR]		= 0x0468,
81 	[CSMR]		= 0x04E4,
82 
83 	[ECMR]		= 0x0500,
84 	[ECSR]		= 0x0510,
85 	[ECSIPR]	= 0x0518,
86 	[PIR]		= 0x0520,
87 	[PSR]		= 0x0528,
88 	[PIPR]		= 0x052c,
89 	[RFLR]		= 0x0508,
90 	[APR]		= 0x0554,
91 	[MPR]		= 0x0558,
92 	[PFTCR]		= 0x055c,
93 	[PFRCR]		= 0x0560,
94 	[TPAUSER]	= 0x0564,
95 	[GECMR]		= 0x05b0,
96 	[BCULR]		= 0x05b4,
97 	[MAHR]		= 0x05c0,
98 	[MALR]		= 0x05c8,
99 	[TROCR]		= 0x0700,
100 	[CDCR]		= 0x0708,
101 	[LCCR]		= 0x0710,
102 	[CEFCR]		= 0x0740,
103 	[FRECR]		= 0x0748,
104 	[TSFRCR]	= 0x0750,
105 	[TLFRCR]	= 0x0758,
106 	[RFCR]		= 0x0760,
107 	[CERCR]		= 0x0768,
108 	[CEECR]		= 0x0770,
109 	[MAFCR]		= 0x0778,
110 	[RMII_MII]	= 0x0790,
111 
112 	[ARSTR]		= 0x0000,
113 	[TSU_CTRST]	= 0x0004,
114 	[TSU_FWEN0]	= 0x0010,
115 	[TSU_FWEN1]	= 0x0014,
116 	[TSU_FCM]	= 0x0018,
117 	[TSU_BSYSL0]	= 0x0020,
118 	[TSU_BSYSL1]	= 0x0024,
119 	[TSU_PRISL0]	= 0x0028,
120 	[TSU_PRISL1]	= 0x002c,
121 	[TSU_FWSL0]	= 0x0030,
122 	[TSU_FWSL1]	= 0x0034,
123 	[TSU_FWSLC]	= 0x0038,
124 	[TSU_QTAGM0]	= 0x0040,
125 	[TSU_QTAGM1]	= 0x0044,
126 	[TSU_FWSR]	= 0x0050,
127 	[TSU_FWINMK]	= 0x0054,
128 	[TSU_ADQT0]	= 0x0048,
129 	[TSU_ADQT1]	= 0x004c,
130 	[TSU_VTAG0]	= 0x0058,
131 	[TSU_VTAG1]	= 0x005c,
132 	[TSU_ADSBSY]	= 0x0060,
133 	[TSU_TEN]	= 0x0064,
134 	[TSU_POST1]	= 0x0070,
135 	[TSU_POST2]	= 0x0074,
136 	[TSU_POST3]	= 0x0078,
137 	[TSU_POST4]	= 0x007c,
138 	[TSU_ADRH0]	= 0x0100,
139 
140 	[TXNLCR0]	= 0x0080,
141 	[TXALCR0]	= 0x0084,
142 	[RXNLCR0]	= 0x0088,
143 	[RXALCR0]	= 0x008c,
144 	[FWNLCR0]	= 0x0090,
145 	[FWALCR0]	= 0x0094,
146 	[TXNLCR1]	= 0x00a0,
147 	[TXALCR1]	= 0x00a4,
148 	[RXNLCR1]	= 0x00a8,
149 	[RXALCR1]	= 0x00ac,
150 	[FWNLCR1]	= 0x00b0,
151 	[FWALCR1]	= 0x00b4,
152 };
153 
154 static const u16 sh_eth_offset_fast_rcar[SH_ETH_MAX_REGISTER_OFFSET] = {
155 	SH_ETH_OFFSET_DEFAULTS,
156 
157 	[ECMR]		= 0x0300,
158 	[RFLR]		= 0x0308,
159 	[ECSR]		= 0x0310,
160 	[ECSIPR]	= 0x0318,
161 	[PIR]		= 0x0320,
162 	[PSR]		= 0x0328,
163 	[RDMLR]		= 0x0340,
164 	[IPGR]		= 0x0350,
165 	[APR]		= 0x0354,
166 	[MPR]		= 0x0358,
167 	[RFCF]		= 0x0360,
168 	[TPAUSER]	= 0x0364,
169 	[TPAUSECR]	= 0x0368,
170 	[MAHR]		= 0x03c0,
171 	[MALR]		= 0x03c8,
172 	[TROCR]		= 0x03d0,
173 	[CDCR]		= 0x03d4,
174 	[LCCR]		= 0x03d8,
175 	[CNDCR]		= 0x03dc,
176 	[CEFCR]		= 0x03e4,
177 	[FRECR]		= 0x03e8,
178 	[TSFRCR]	= 0x03ec,
179 	[TLFRCR]	= 0x03f0,
180 	[RFCR]		= 0x03f4,
181 	[MAFCR]		= 0x03f8,
182 
183 	[EDMR]		= 0x0200,
184 	[EDTRR]		= 0x0208,
185 	[EDRRR]		= 0x0210,
186 	[TDLAR]		= 0x0218,
187 	[RDLAR]		= 0x0220,
188 	[EESR]		= 0x0228,
189 	[EESIPR]	= 0x0230,
190 	[TRSCER]	= 0x0238,
191 	[RMFCR]		= 0x0240,
192 	[TFTR]		= 0x0248,
193 	[FDR]		= 0x0250,
194 	[RMCR]		= 0x0258,
195 	[TFUCR]		= 0x0264,
196 	[RFOCR]		= 0x0268,
197 	[RMIIMODE]      = 0x026c,
198 	[FCFTR]		= 0x0270,
199 	[TRIMD]		= 0x027c,
200 };
201 
202 static const u16 sh_eth_offset_fast_sh4[SH_ETH_MAX_REGISTER_OFFSET] = {
203 	SH_ETH_OFFSET_DEFAULTS,
204 
205 	[ECMR]		= 0x0100,
206 	[RFLR]		= 0x0108,
207 	[ECSR]		= 0x0110,
208 	[ECSIPR]	= 0x0118,
209 	[PIR]		= 0x0120,
210 	[PSR]		= 0x0128,
211 	[RDMLR]		= 0x0140,
212 	[IPGR]		= 0x0150,
213 	[APR]		= 0x0154,
214 	[MPR]		= 0x0158,
215 	[TPAUSER]	= 0x0164,
216 	[RFCF]		= 0x0160,
217 	[TPAUSECR]	= 0x0168,
218 	[BCFRR]		= 0x016c,
219 	[MAHR]		= 0x01c0,
220 	[MALR]		= 0x01c8,
221 	[TROCR]		= 0x01d0,
222 	[CDCR]		= 0x01d4,
223 	[LCCR]		= 0x01d8,
224 	[CNDCR]		= 0x01dc,
225 	[CEFCR]		= 0x01e4,
226 	[FRECR]		= 0x01e8,
227 	[TSFRCR]	= 0x01ec,
228 	[TLFRCR]	= 0x01f0,
229 	[RFCR]		= 0x01f4,
230 	[MAFCR]		= 0x01f8,
231 	[RTRATE]	= 0x01fc,
232 
233 	[EDMR]		= 0x0000,
234 	[EDTRR]		= 0x0008,
235 	[EDRRR]		= 0x0010,
236 	[TDLAR]		= 0x0018,
237 	[RDLAR]		= 0x0020,
238 	[EESR]		= 0x0028,
239 	[EESIPR]	= 0x0030,
240 	[TRSCER]	= 0x0038,
241 	[RMFCR]		= 0x0040,
242 	[TFTR]		= 0x0048,
243 	[FDR]		= 0x0050,
244 	[RMCR]		= 0x0058,
245 	[TFUCR]		= 0x0064,
246 	[RFOCR]		= 0x0068,
247 	[FCFTR]		= 0x0070,
248 	[RPADIR]	= 0x0078,
249 	[TRIMD]		= 0x007c,
250 	[RBWAR]		= 0x00c8,
251 	[RDFAR]		= 0x00cc,
252 	[TBRAR]		= 0x00d4,
253 	[TDFAR]		= 0x00d8,
254 };
255 
256 static const u16 sh_eth_offset_fast_sh3_sh2[SH_ETH_MAX_REGISTER_OFFSET] = {
257 	SH_ETH_OFFSET_DEFAULTS,
258 
259 	[EDMR]		= 0x0000,
260 	[EDTRR]		= 0x0004,
261 	[EDRRR]		= 0x0008,
262 	[TDLAR]		= 0x000c,
263 	[RDLAR]		= 0x0010,
264 	[EESR]		= 0x0014,
265 	[EESIPR]	= 0x0018,
266 	[TRSCER]	= 0x001c,
267 	[RMFCR]		= 0x0020,
268 	[TFTR]		= 0x0024,
269 	[FDR]		= 0x0028,
270 	[RMCR]		= 0x002c,
271 	[EDOCR]		= 0x0030,
272 	[FCFTR]		= 0x0034,
273 	[RPADIR]	= 0x0038,
274 	[TRIMD]		= 0x003c,
275 	[RBWAR]		= 0x0040,
276 	[RDFAR]		= 0x0044,
277 	[TBRAR]		= 0x004c,
278 	[TDFAR]		= 0x0050,
279 
280 	[ECMR]		= 0x0160,
281 	[ECSR]		= 0x0164,
282 	[ECSIPR]	= 0x0168,
283 	[PIR]		= 0x016c,
284 	[MAHR]		= 0x0170,
285 	[MALR]		= 0x0174,
286 	[RFLR]		= 0x0178,
287 	[PSR]		= 0x017c,
288 	[TROCR]		= 0x0180,
289 	[CDCR]		= 0x0184,
290 	[LCCR]		= 0x0188,
291 	[CNDCR]		= 0x018c,
292 	[CEFCR]		= 0x0194,
293 	[FRECR]		= 0x0198,
294 	[TSFRCR]	= 0x019c,
295 	[TLFRCR]	= 0x01a0,
296 	[RFCR]		= 0x01a4,
297 	[MAFCR]		= 0x01a8,
298 	[IPGR]		= 0x01b4,
299 	[APR]		= 0x01b8,
300 	[MPR]		= 0x01bc,
301 	[TPAUSER]	= 0x01c4,
302 	[BCFR]		= 0x01cc,
303 
304 	[ARSTR]		= 0x0000,
305 	[TSU_CTRST]	= 0x0004,
306 	[TSU_FWEN0]	= 0x0010,
307 	[TSU_FWEN1]	= 0x0014,
308 	[TSU_FCM]	= 0x0018,
309 	[TSU_BSYSL0]	= 0x0020,
310 	[TSU_BSYSL1]	= 0x0024,
311 	[TSU_PRISL0]	= 0x0028,
312 	[TSU_PRISL1]	= 0x002c,
313 	[TSU_FWSL0]	= 0x0030,
314 	[TSU_FWSL1]	= 0x0034,
315 	[TSU_FWSLC]	= 0x0038,
316 	[TSU_QTAGM0]	= 0x0040,
317 	[TSU_QTAGM1]	= 0x0044,
318 	[TSU_ADQT0]	= 0x0048,
319 	[TSU_ADQT1]	= 0x004c,
320 	[TSU_FWSR]	= 0x0050,
321 	[TSU_FWINMK]	= 0x0054,
322 	[TSU_ADSBSY]	= 0x0060,
323 	[TSU_TEN]	= 0x0064,
324 	[TSU_POST1]	= 0x0070,
325 	[TSU_POST2]	= 0x0074,
326 	[TSU_POST3]	= 0x0078,
327 	[TSU_POST4]	= 0x007c,
328 
329 	[TXNLCR0]	= 0x0080,
330 	[TXALCR0]	= 0x0084,
331 	[RXNLCR0]	= 0x0088,
332 	[RXALCR0]	= 0x008c,
333 	[FWNLCR0]	= 0x0090,
334 	[FWALCR0]	= 0x0094,
335 	[TXNLCR1]	= 0x00a0,
336 	[TXALCR1]	= 0x00a4,
337 	[RXNLCR1]	= 0x00a8,
338 	[RXALCR1]	= 0x00ac,
339 	[FWNLCR1]	= 0x00b0,
340 	[FWALCR1]	= 0x00b4,
341 
342 	[TSU_ADRH0]	= 0x0100,
343 };
344 __diag_pop();
345 
346 static void sh_eth_rcv_snd_disable(struct net_device *ndev);
347 static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev);
348 
349 static void sh_eth_write(struct net_device *ndev, u32 data, int enum_index)
350 {
351 	struct sh_eth_private *mdp = netdev_priv(ndev);
352 	u16 offset = mdp->reg_offset[enum_index];
353 
354 	if (WARN_ON(offset == SH_ETH_OFFSET_INVALID))
355 		return;
356 
357 	iowrite32(data, mdp->addr + offset);
358 }
359 
360 static u32 sh_eth_read(struct net_device *ndev, int enum_index)
361 {
362 	struct sh_eth_private *mdp = netdev_priv(ndev);
363 	u16 offset = mdp->reg_offset[enum_index];
364 
365 	if (WARN_ON(offset == SH_ETH_OFFSET_INVALID))
366 		return ~0U;
367 
368 	return ioread32(mdp->addr + offset);
369 }
370 
371 static void sh_eth_modify(struct net_device *ndev, int enum_index, u32 clear,
372 			  u32 set)
373 {
374 	sh_eth_write(ndev, (sh_eth_read(ndev, enum_index) & ~clear) | set,
375 		     enum_index);
376 }
377 
378 static u16 sh_eth_tsu_get_offset(struct sh_eth_private *mdp, int enum_index)
379 {
380 	return mdp->reg_offset[enum_index];
381 }
382 
383 static void sh_eth_tsu_write(struct sh_eth_private *mdp, u32 data,
384 			     int enum_index)
385 {
386 	u16 offset = sh_eth_tsu_get_offset(mdp, enum_index);
387 
388 	if (WARN_ON(offset == SH_ETH_OFFSET_INVALID))
389 		return;
390 
391 	iowrite32(data, mdp->tsu_addr + offset);
392 }
393 
394 static u32 sh_eth_tsu_read(struct sh_eth_private *mdp, int enum_index)
395 {
396 	u16 offset = sh_eth_tsu_get_offset(mdp, enum_index);
397 
398 	if (WARN_ON(offset == SH_ETH_OFFSET_INVALID))
399 		return ~0U;
400 
401 	return ioread32(mdp->tsu_addr + offset);
402 }
403 
404 static void sh_eth_soft_swap(char *src, int len)
405 {
406 #ifdef __LITTLE_ENDIAN
407 	u32 *p = (u32 *)src;
408 	u32 *maxp = p + DIV_ROUND_UP(len, sizeof(u32));
409 
410 	for (; p < maxp; p++)
411 		*p = swab32(*p);
412 #endif
413 }
414 
415 static void sh_eth_select_mii(struct net_device *ndev)
416 {
417 	struct sh_eth_private *mdp = netdev_priv(ndev);
418 	u32 value;
419 
420 	switch (mdp->phy_interface) {
421 	case PHY_INTERFACE_MODE_RGMII ... PHY_INTERFACE_MODE_RGMII_TXID:
422 		value = 0x3;
423 		break;
424 	case PHY_INTERFACE_MODE_GMII:
425 		value = 0x2;
426 		break;
427 	case PHY_INTERFACE_MODE_MII:
428 		value = 0x1;
429 		break;
430 	case PHY_INTERFACE_MODE_RMII:
431 		value = 0x0;
432 		break;
433 	default:
434 		netdev_warn(ndev,
435 			    "PHY interface mode was not setup. Set to MII.\n");
436 		value = 0x1;
437 		break;
438 	}
439 
440 	sh_eth_write(ndev, value, RMII_MII);
441 }
442 
443 static void sh_eth_set_duplex(struct net_device *ndev)
444 {
445 	struct sh_eth_private *mdp = netdev_priv(ndev);
446 
447 	sh_eth_modify(ndev, ECMR, ECMR_DM, mdp->duplex ? ECMR_DM : 0);
448 }
449 
450 static void sh_eth_chip_reset(struct net_device *ndev)
451 {
452 	struct sh_eth_private *mdp = netdev_priv(ndev);
453 
454 	/* reset device */
455 	sh_eth_tsu_write(mdp, ARSTR_ARST, ARSTR);
456 	mdelay(1);
457 }
458 
459 static int sh_eth_soft_reset(struct net_device *ndev)
460 {
461 	sh_eth_modify(ndev, EDMR, EDMR_SRST_ETHER, EDMR_SRST_ETHER);
462 	mdelay(3);
463 	sh_eth_modify(ndev, EDMR, EDMR_SRST_ETHER, 0);
464 
465 	return 0;
466 }
467 
468 static int sh_eth_check_soft_reset(struct net_device *ndev)
469 {
470 	int cnt;
471 
472 	for (cnt = 100; cnt > 0; cnt--) {
473 		if (!(sh_eth_read(ndev, EDMR) & EDMR_SRST_GETHER))
474 			return 0;
475 		mdelay(1);
476 	}
477 
478 	netdev_err(ndev, "Device reset failed\n");
479 	return -ETIMEDOUT;
480 }
481 
482 static int sh_eth_soft_reset_gether(struct net_device *ndev)
483 {
484 	struct sh_eth_private *mdp = netdev_priv(ndev);
485 	int ret;
486 
487 	sh_eth_write(ndev, EDSR_ENALL, EDSR);
488 	sh_eth_modify(ndev, EDMR, EDMR_SRST_GETHER, EDMR_SRST_GETHER);
489 
490 	ret = sh_eth_check_soft_reset(ndev);
491 	if (ret)
492 		return ret;
493 
494 	/* Table Init */
495 	sh_eth_write(ndev, 0, TDLAR);
496 	sh_eth_write(ndev, 0, TDFAR);
497 	sh_eth_write(ndev, 0, TDFXR);
498 	sh_eth_write(ndev, 0, TDFFR);
499 	sh_eth_write(ndev, 0, RDLAR);
500 	sh_eth_write(ndev, 0, RDFAR);
501 	sh_eth_write(ndev, 0, RDFXR);
502 	sh_eth_write(ndev, 0, RDFFR);
503 
504 	/* Reset HW CRC register */
505 	if (mdp->cd->csmr)
506 		sh_eth_write(ndev, 0, CSMR);
507 
508 	/* Select MII mode */
509 	if (mdp->cd->select_mii)
510 		sh_eth_select_mii(ndev);
511 
512 	return ret;
513 }
514 
515 static void sh_eth_set_rate_gether(struct net_device *ndev)
516 {
517 	struct sh_eth_private *mdp = netdev_priv(ndev);
518 
519 	if (WARN_ON(!mdp->cd->gecmr))
520 		return;
521 
522 	switch (mdp->speed) {
523 	case 10: /* 10BASE */
524 		sh_eth_write(ndev, GECMR_10, GECMR);
525 		break;
526 	case 100:/* 100BASE */
527 		sh_eth_write(ndev, GECMR_100, GECMR);
528 		break;
529 	case 1000: /* 1000BASE */
530 		sh_eth_write(ndev, GECMR_1000, GECMR);
531 		break;
532 	}
533 }
534 
535 #ifdef CONFIG_OF
536 /* R7S72100 */
537 static struct sh_eth_cpu_data r7s72100_data = {
538 	.soft_reset	= sh_eth_soft_reset_gether,
539 
540 	.chip_reset	= sh_eth_chip_reset,
541 	.set_duplex	= sh_eth_set_duplex,
542 
543 	.register_type	= SH_ETH_REG_GIGABIT,
544 
545 	.edtrr_trns	= EDTRR_TRNS_GETHER,
546 	.ecsr_value	= ECSR_ICD,
547 	.ecsipr_value	= ECSIPR_ICDIP,
548 	.eesipr_value	= EESIPR_TWB1IP | EESIPR_TWBIP | EESIPR_TC1IP |
549 			  EESIPR_TABTIP | EESIPR_RABTIP | EESIPR_RFCOFIP |
550 			  EESIPR_ECIIP |
551 			  EESIPR_FTCIP | EESIPR_TDEIP | EESIPR_TFUFIP |
552 			  EESIPR_FRIP | EESIPR_RDEIP | EESIPR_RFOFIP |
553 			  EESIPR_RMAFIP | EESIPR_RRFIP |
554 			  EESIPR_RTLFIP | EESIPR_RTSFIP |
555 			  EESIPR_PREIP | EESIPR_CERFIP,
556 
557 	.tx_check	= EESR_TC1 | EESR_FTC,
558 	.eesr_err_check	= EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
559 			  EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
560 			  EESR_TDE,
561 	.fdr_value	= 0x0000070f,
562 
563 	.trscer_err_mask = TRSCER_RMAFCE | TRSCER_RRFCE,
564 
565 	.no_psr		= 1,
566 	.apr		= 1,
567 	.mpr		= 1,
568 	.tpauser	= 1,
569 	.hw_swap	= 1,
570 	.rpadir		= 1,
571 	.no_trimd	= 1,
572 	.no_ade		= 1,
573 	.xdfar_rw	= 1,
574 	.csmr		= 1,
575 	.rx_csum	= 1,
576 	.tsu		= 1,
577 	.no_tx_cntrs	= 1,
578 };
579 
580 static void sh_eth_chip_reset_r8a7740(struct net_device *ndev)
581 {
582 	sh_eth_chip_reset(ndev);
583 
584 	sh_eth_select_mii(ndev);
585 }
586 
587 /* R8A7740 */
588 static struct sh_eth_cpu_data r8a7740_data = {
589 	.soft_reset	= sh_eth_soft_reset_gether,
590 
591 	.chip_reset	= sh_eth_chip_reset_r8a7740,
592 	.set_duplex	= sh_eth_set_duplex,
593 	.set_rate	= sh_eth_set_rate_gether,
594 
595 	.register_type	= SH_ETH_REG_GIGABIT,
596 
597 	.edtrr_trns	= EDTRR_TRNS_GETHER,
598 	.ecsr_value	= ECSR_ICD | ECSR_MPD,
599 	.ecsipr_value	= ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
600 	.eesipr_value	= EESIPR_RFCOFIP | EESIPR_ECIIP |
601 			  EESIPR_FTCIP | EESIPR_TDEIP | EESIPR_TFUFIP |
602 			  EESIPR_FRIP | EESIPR_RDEIP | EESIPR_RFOFIP |
603 			  0x0000f000 | EESIPR_CNDIP | EESIPR_DLCIP |
604 			  EESIPR_CDIP | EESIPR_TROIP | EESIPR_RMAFIP |
605 			  EESIPR_CEEFIP | EESIPR_CELFIP |
606 			  EESIPR_RRFIP | EESIPR_RTLFIP | EESIPR_RTSFIP |
607 			  EESIPR_PREIP | EESIPR_CERFIP,
608 
609 	.tx_check	= EESR_TC1 | EESR_FTC,
610 	.eesr_err_check	= EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
611 			  EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
612 			  EESR_TDE,
613 	.fdr_value	= 0x0000070f,
614 
615 	.apr		= 1,
616 	.mpr		= 1,
617 	.tpauser	= 1,
618 	.gecmr		= 1,
619 	.bculr		= 1,
620 	.hw_swap	= 1,
621 	.rpadir		= 1,
622 	.no_trimd	= 1,
623 	.no_ade		= 1,
624 	.xdfar_rw	= 1,
625 	.csmr		= 1,
626 	.rx_csum	= 1,
627 	.tsu		= 1,
628 	.select_mii	= 1,
629 	.magic		= 1,
630 	.cexcr		= 1,
631 };
632 
633 /* There is CPU dependent code */
634 static void sh_eth_set_rate_rcar(struct net_device *ndev)
635 {
636 	struct sh_eth_private *mdp = netdev_priv(ndev);
637 
638 	switch (mdp->speed) {
639 	case 10: /* 10BASE */
640 		sh_eth_modify(ndev, ECMR, ECMR_ELB, 0);
641 		break;
642 	case 100:/* 100BASE */
643 		sh_eth_modify(ndev, ECMR, ECMR_ELB, ECMR_ELB);
644 		break;
645 	}
646 }
647 
648 /* R-Car Gen1 */
649 static struct sh_eth_cpu_data rcar_gen1_data = {
650 	.soft_reset	= sh_eth_soft_reset,
651 
652 	.set_duplex	= sh_eth_set_duplex,
653 	.set_rate	= sh_eth_set_rate_rcar,
654 
655 	.register_type	= SH_ETH_REG_FAST_RCAR,
656 
657 	.edtrr_trns	= EDTRR_TRNS_ETHER,
658 	.ecsr_value	= ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
659 	.ecsipr_value	= ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
660 	.eesipr_value	= EESIPR_RFCOFIP | EESIPR_ADEIP | EESIPR_ECIIP |
661 			  EESIPR_FTCIP | EESIPR_TDEIP | EESIPR_TFUFIP |
662 			  EESIPR_FRIP | EESIPR_RDEIP | EESIPR_RFOFIP |
663 			  EESIPR_RMAFIP | EESIPR_RRFIP |
664 			  EESIPR_RTLFIP | EESIPR_RTSFIP |
665 			  EESIPR_PREIP | EESIPR_CERFIP,
666 
667 	.tx_check	= EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_TRO,
668 	.eesr_err_check	= EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
669 			  EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE,
670 	.fdr_value	= 0x00000f0f,
671 
672 	.apr		= 1,
673 	.mpr		= 1,
674 	.tpauser	= 1,
675 	.hw_swap	= 1,
676 	.no_xdfar	= 1,
677 };
678 
679 /* R-Car Gen2 and RZ/G1 */
680 static struct sh_eth_cpu_data rcar_gen2_data = {
681 	.soft_reset	= sh_eth_soft_reset,
682 
683 	.set_duplex	= sh_eth_set_duplex,
684 	.set_rate	= sh_eth_set_rate_rcar,
685 
686 	.register_type	= SH_ETH_REG_FAST_RCAR,
687 
688 	.edtrr_trns	= EDTRR_TRNS_ETHER,
689 	.ecsr_value	= ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD | ECSR_MPD,
690 	.ecsipr_value	= ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP |
691 			  ECSIPR_MPDIP,
692 	.eesipr_value	= EESIPR_RFCOFIP | EESIPR_ADEIP | EESIPR_ECIIP |
693 			  EESIPR_FTCIP | EESIPR_TDEIP | EESIPR_TFUFIP |
694 			  EESIPR_FRIP | EESIPR_RDEIP | EESIPR_RFOFIP |
695 			  EESIPR_RMAFIP | EESIPR_RRFIP |
696 			  EESIPR_RTLFIP | EESIPR_RTSFIP |
697 			  EESIPR_PREIP | EESIPR_CERFIP,
698 
699 	.tx_check	= EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_TRO,
700 	.eesr_err_check	= EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
701 			  EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE,
702 	.fdr_value	= 0x00000f0f,
703 
704 	.trscer_err_mask = TRSCER_RMAFCE,
705 
706 	.apr		= 1,
707 	.mpr		= 1,
708 	.tpauser	= 1,
709 	.hw_swap	= 1,
710 	.no_xdfar	= 1,
711 	.rmiimode	= 1,
712 	.magic		= 1,
713 };
714 
715 /* R8A77980 */
716 static struct sh_eth_cpu_data r8a77980_data = {
717 	.soft_reset	= sh_eth_soft_reset_gether,
718 
719 	.set_duplex	= sh_eth_set_duplex,
720 	.set_rate	= sh_eth_set_rate_gether,
721 
722 	.register_type  = SH_ETH_REG_GIGABIT,
723 
724 	.edtrr_trns	= EDTRR_TRNS_GETHER,
725 	.ecsr_value	= ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD | ECSR_MPD,
726 	.ecsipr_value	= ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP |
727 			  ECSIPR_MPDIP,
728 	.eesipr_value	= EESIPR_RFCOFIP | EESIPR_ECIIP |
729 			  EESIPR_FTCIP | EESIPR_TDEIP | EESIPR_TFUFIP |
730 			  EESIPR_FRIP | EESIPR_RDEIP | EESIPR_RFOFIP |
731 			  EESIPR_RMAFIP | EESIPR_RRFIP |
732 			  EESIPR_RTLFIP | EESIPR_RTSFIP |
733 			  EESIPR_PREIP | EESIPR_CERFIP,
734 
735 	.tx_check       = EESR_FTC | EESR_CD | EESR_TRO,
736 	.eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
737 			  EESR_RFE | EESR_RDE | EESR_RFRMER |
738 			  EESR_TFE | EESR_TDE | EESR_ECI,
739 	.fdr_value	= 0x0000070f,
740 
741 	.apr		= 1,
742 	.mpr		= 1,
743 	.tpauser	= 1,
744 	.gecmr		= 1,
745 	.bculr		= 1,
746 	.hw_swap	= 1,
747 	.nbst		= 1,
748 	.rpadir		= 1,
749 	.no_trimd	= 1,
750 	.no_ade		= 1,
751 	.xdfar_rw	= 1,
752 	.csmr		= 1,
753 	.rx_csum	= 1,
754 	.select_mii	= 1,
755 	.magic		= 1,
756 	.cexcr		= 1,
757 };
758 
759 /* R7S9210 */
760 static struct sh_eth_cpu_data r7s9210_data = {
761 	.soft_reset	= sh_eth_soft_reset,
762 
763 	.set_duplex	= sh_eth_set_duplex,
764 	.set_rate	= sh_eth_set_rate_rcar,
765 
766 	.register_type	= SH_ETH_REG_FAST_SH4,
767 
768 	.edtrr_trns	= EDTRR_TRNS_ETHER,
769 	.ecsr_value	= ECSR_ICD,
770 	.ecsipr_value	= ECSIPR_ICDIP,
771 	.eesipr_value	= EESIPR_TWBIP | EESIPR_TABTIP | EESIPR_RABTIP |
772 			  EESIPR_RFCOFIP | EESIPR_ECIIP | EESIPR_FTCIP |
773 			  EESIPR_TDEIP | EESIPR_TFUFIP | EESIPR_FRIP |
774 			  EESIPR_RDEIP | EESIPR_RFOFIP | EESIPR_CNDIP |
775 			  EESIPR_DLCIP | EESIPR_CDIP | EESIPR_TROIP |
776 			  EESIPR_RMAFIP | EESIPR_RRFIP | EESIPR_RTLFIP |
777 			  EESIPR_RTSFIP | EESIPR_PREIP | EESIPR_CERFIP,
778 
779 	.tx_check	= EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_TRO,
780 	.eesr_err_check	= EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
781 			  EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE,
782 
783 	.fdr_value	= 0x0000070f,
784 
785 	.trscer_err_mask = TRSCER_RMAFCE | TRSCER_RRFCE,
786 
787 	.apr		= 1,
788 	.mpr		= 1,
789 	.tpauser	= 1,
790 	.hw_swap	= 1,
791 	.rpadir		= 1,
792 	.no_ade		= 1,
793 	.xdfar_rw	= 1,
794 };
795 #endif /* CONFIG_OF */
796 
797 static void sh_eth_set_rate_sh7724(struct net_device *ndev)
798 {
799 	struct sh_eth_private *mdp = netdev_priv(ndev);
800 
801 	switch (mdp->speed) {
802 	case 10: /* 10BASE */
803 		sh_eth_modify(ndev, ECMR, ECMR_RTM, 0);
804 		break;
805 	case 100:/* 100BASE */
806 		sh_eth_modify(ndev, ECMR, ECMR_RTM, ECMR_RTM);
807 		break;
808 	}
809 }
810 
811 /* SH7724 */
812 static struct sh_eth_cpu_data sh7724_data = {
813 	.soft_reset	= sh_eth_soft_reset,
814 
815 	.set_duplex	= sh_eth_set_duplex,
816 	.set_rate	= sh_eth_set_rate_sh7724,
817 
818 	.register_type	= SH_ETH_REG_FAST_SH4,
819 
820 	.edtrr_trns	= EDTRR_TRNS_ETHER,
821 	.ecsr_value	= ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
822 	.ecsipr_value	= ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
823 	.eesipr_value	= EESIPR_RFCOFIP | EESIPR_ADEIP | EESIPR_ECIIP |
824 			  EESIPR_FTCIP | EESIPR_TDEIP | EESIPR_TFUFIP |
825 			  EESIPR_FRIP | EESIPR_RDEIP | EESIPR_RFOFIP |
826 			  EESIPR_RMAFIP | EESIPR_RRFIP |
827 			  EESIPR_RTLFIP | EESIPR_RTSFIP |
828 			  EESIPR_PREIP | EESIPR_CERFIP,
829 
830 	.tx_check	= EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_TRO,
831 	.eesr_err_check	= EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
832 			  EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE,
833 
834 	.apr		= 1,
835 	.mpr		= 1,
836 	.tpauser	= 1,
837 	.hw_swap	= 1,
838 	.rpadir		= 1,
839 };
840 
841 static void sh_eth_set_rate_sh7757(struct net_device *ndev)
842 {
843 	struct sh_eth_private *mdp = netdev_priv(ndev);
844 
845 	switch (mdp->speed) {
846 	case 10: /* 10BASE */
847 		sh_eth_write(ndev, 0, RTRATE);
848 		break;
849 	case 100:/* 100BASE */
850 		sh_eth_write(ndev, 1, RTRATE);
851 		break;
852 	}
853 }
854 
855 /* SH7757 */
856 static struct sh_eth_cpu_data sh7757_data = {
857 	.soft_reset	= sh_eth_soft_reset,
858 
859 	.set_duplex	= sh_eth_set_duplex,
860 	.set_rate	= sh_eth_set_rate_sh7757,
861 
862 	.register_type	= SH_ETH_REG_FAST_SH4,
863 
864 	.edtrr_trns	= EDTRR_TRNS_ETHER,
865 	.eesipr_value	= EESIPR_RFCOFIP | EESIPR_ECIIP |
866 			  EESIPR_FTCIP | EESIPR_TDEIP | EESIPR_TFUFIP |
867 			  EESIPR_FRIP | EESIPR_RDEIP | EESIPR_RFOFIP |
868 			  0x0000f000 | EESIPR_CNDIP | EESIPR_DLCIP |
869 			  EESIPR_CDIP | EESIPR_TROIP | EESIPR_RMAFIP |
870 			  EESIPR_CEEFIP | EESIPR_CELFIP |
871 			  EESIPR_RRFIP | EESIPR_RTLFIP | EESIPR_RTSFIP |
872 			  EESIPR_PREIP | EESIPR_CERFIP,
873 
874 	.tx_check	= EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_TRO,
875 	.eesr_err_check	= EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
876 			  EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE,
877 
878 	.irq_flags	= IRQF_SHARED,
879 	.apr		= 1,
880 	.mpr		= 1,
881 	.tpauser	= 1,
882 	.hw_swap	= 1,
883 	.no_ade		= 1,
884 	.rpadir		= 1,
885 	.rtrate		= 1,
886 	.dual_port	= 1,
887 };
888 
889 #define SH_GIGA_ETH_BASE	0xfee00000UL
890 #define GIGA_MALR(port)		(SH_GIGA_ETH_BASE + 0x800 * (port) + 0x05c8)
891 #define GIGA_MAHR(port)		(SH_GIGA_ETH_BASE + 0x800 * (port) + 0x05c0)
892 static void sh_eth_chip_reset_giga(struct net_device *ndev)
893 {
894 	u32 mahr[2], malr[2];
895 	int i;
896 
897 	/* save MAHR and MALR */
898 	for (i = 0; i < 2; i++) {
899 		malr[i] = ioread32((void *)GIGA_MALR(i));
900 		mahr[i] = ioread32((void *)GIGA_MAHR(i));
901 	}
902 
903 	sh_eth_chip_reset(ndev);
904 
905 	/* restore MAHR and MALR */
906 	for (i = 0; i < 2; i++) {
907 		iowrite32(malr[i], (void *)GIGA_MALR(i));
908 		iowrite32(mahr[i], (void *)GIGA_MAHR(i));
909 	}
910 }
911 
912 static void sh_eth_set_rate_giga(struct net_device *ndev)
913 {
914 	struct sh_eth_private *mdp = netdev_priv(ndev);
915 
916 	if (WARN_ON(!mdp->cd->gecmr))
917 		return;
918 
919 	switch (mdp->speed) {
920 	case 10: /* 10BASE */
921 		sh_eth_write(ndev, 0x00000000, GECMR);
922 		break;
923 	case 100:/* 100BASE */
924 		sh_eth_write(ndev, 0x00000010, GECMR);
925 		break;
926 	case 1000: /* 1000BASE */
927 		sh_eth_write(ndev, 0x00000020, GECMR);
928 		break;
929 	}
930 }
931 
932 /* SH7757(GETHERC) */
933 static struct sh_eth_cpu_data sh7757_data_giga = {
934 	.soft_reset	= sh_eth_soft_reset_gether,
935 
936 	.chip_reset	= sh_eth_chip_reset_giga,
937 	.set_duplex	= sh_eth_set_duplex,
938 	.set_rate	= sh_eth_set_rate_giga,
939 
940 	.register_type	= SH_ETH_REG_GIGABIT,
941 
942 	.edtrr_trns	= EDTRR_TRNS_GETHER,
943 	.ecsr_value	= ECSR_ICD | ECSR_MPD,
944 	.ecsipr_value	= ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
945 	.eesipr_value	= EESIPR_RFCOFIP | EESIPR_ECIIP |
946 			  EESIPR_FTCIP | EESIPR_TDEIP | EESIPR_TFUFIP |
947 			  EESIPR_FRIP | EESIPR_RDEIP | EESIPR_RFOFIP |
948 			  0x0000f000 | EESIPR_CNDIP | EESIPR_DLCIP |
949 			  EESIPR_CDIP | EESIPR_TROIP | EESIPR_RMAFIP |
950 			  EESIPR_CEEFIP | EESIPR_CELFIP |
951 			  EESIPR_RRFIP | EESIPR_RTLFIP | EESIPR_RTSFIP |
952 			  EESIPR_PREIP | EESIPR_CERFIP,
953 
954 	.tx_check	= EESR_TC1 | EESR_FTC,
955 	.eesr_err_check	= EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
956 			  EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
957 			  EESR_TDE,
958 	.fdr_value	= 0x0000072f,
959 
960 	.irq_flags	= IRQF_SHARED,
961 	.apr		= 1,
962 	.mpr		= 1,
963 	.tpauser	= 1,
964 	.gecmr		= 1,
965 	.bculr		= 1,
966 	.hw_swap	= 1,
967 	.rpadir		= 1,
968 	.no_trimd	= 1,
969 	.no_ade		= 1,
970 	.xdfar_rw	= 1,
971 	.tsu		= 1,
972 	.cexcr		= 1,
973 	.dual_port	= 1,
974 };
975 
976 /* SH7734 */
977 static struct sh_eth_cpu_data sh7734_data = {
978 	.soft_reset	= sh_eth_soft_reset_gether,
979 
980 	.chip_reset	= sh_eth_chip_reset,
981 	.set_duplex	= sh_eth_set_duplex,
982 	.set_rate	= sh_eth_set_rate_gether,
983 
984 	.register_type	= SH_ETH_REG_GIGABIT,
985 
986 	.edtrr_trns	= EDTRR_TRNS_GETHER,
987 	.ecsr_value	= ECSR_ICD | ECSR_MPD,
988 	.ecsipr_value	= ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
989 	.eesipr_value	= EESIPR_RFCOFIP | EESIPR_ECIIP |
990 			  EESIPR_FTCIP | EESIPR_TDEIP | EESIPR_TFUFIP |
991 			  EESIPR_FRIP | EESIPR_RDEIP | EESIPR_RFOFIP |
992 			  EESIPR_DLCIP | EESIPR_CDIP | EESIPR_TROIP |
993 			  EESIPR_RMAFIP | EESIPR_CEEFIP | EESIPR_CELFIP |
994 			  EESIPR_RRFIP | EESIPR_RTLFIP | EESIPR_RTSFIP |
995 			  EESIPR_PREIP | EESIPR_CERFIP,
996 
997 	.tx_check	= EESR_TC1 | EESR_FTC,
998 	.eesr_err_check	= EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
999 			  EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
1000 			  EESR_TDE,
1001 
1002 	.apr		= 1,
1003 	.mpr		= 1,
1004 	.tpauser	= 1,
1005 	.gecmr		= 1,
1006 	.bculr		= 1,
1007 	.hw_swap	= 1,
1008 	.no_trimd	= 1,
1009 	.no_ade		= 1,
1010 	.xdfar_rw	= 1,
1011 	.tsu		= 1,
1012 	.csmr		= 1,
1013 	.rx_csum	= 1,
1014 	.select_mii	= 1,
1015 	.magic		= 1,
1016 	.cexcr		= 1,
1017 };
1018 
1019 /* SH7763 */
1020 static struct sh_eth_cpu_data sh7763_data = {
1021 	.soft_reset	= sh_eth_soft_reset_gether,
1022 
1023 	.chip_reset	= sh_eth_chip_reset,
1024 	.set_duplex	= sh_eth_set_duplex,
1025 	.set_rate	= sh_eth_set_rate_gether,
1026 
1027 	.register_type	= SH_ETH_REG_GIGABIT,
1028 
1029 	.edtrr_trns	= EDTRR_TRNS_GETHER,
1030 	.ecsr_value	= ECSR_ICD | ECSR_MPD,
1031 	.ecsipr_value	= ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
1032 	.eesipr_value	= EESIPR_RFCOFIP | EESIPR_ECIIP |
1033 			  EESIPR_FTCIP | EESIPR_TDEIP | EESIPR_TFUFIP |
1034 			  EESIPR_FRIP | EESIPR_RDEIP | EESIPR_RFOFIP |
1035 			  EESIPR_DLCIP | EESIPR_CDIP | EESIPR_TROIP |
1036 			  EESIPR_RMAFIP | EESIPR_CEEFIP | EESIPR_CELFIP |
1037 			  EESIPR_RRFIP | EESIPR_RTLFIP | EESIPR_RTSFIP |
1038 			  EESIPR_PREIP | EESIPR_CERFIP,
1039 
1040 	.tx_check	= EESR_TC1 | EESR_FTC,
1041 	.eesr_err_check	= EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
1042 			  EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE,
1043 
1044 	.apr		= 1,
1045 	.mpr		= 1,
1046 	.tpauser	= 1,
1047 	.gecmr		= 1,
1048 	.bculr		= 1,
1049 	.hw_swap	= 1,
1050 	.no_trimd	= 1,
1051 	.no_ade		= 1,
1052 	.xdfar_rw	= 1,
1053 	.tsu		= 1,
1054 	.irq_flags	= IRQF_SHARED,
1055 	.magic		= 1,
1056 	.cexcr		= 1,
1057 	.rx_csum	= 1,
1058 	.dual_port	= 1,
1059 };
1060 
1061 static struct sh_eth_cpu_data sh7619_data = {
1062 	.soft_reset	= sh_eth_soft_reset,
1063 
1064 	.register_type	= SH_ETH_REG_FAST_SH3_SH2,
1065 
1066 	.edtrr_trns	= EDTRR_TRNS_ETHER,
1067 	.eesipr_value	= EESIPR_RFCOFIP | EESIPR_ECIIP |
1068 			  EESIPR_FTCIP | EESIPR_TDEIP | EESIPR_TFUFIP |
1069 			  EESIPR_FRIP | EESIPR_RDEIP | EESIPR_RFOFIP |
1070 			  0x0000f000 | EESIPR_CNDIP | EESIPR_DLCIP |
1071 			  EESIPR_CDIP | EESIPR_TROIP | EESIPR_RMAFIP |
1072 			  EESIPR_CEEFIP | EESIPR_CELFIP |
1073 			  EESIPR_RRFIP | EESIPR_RTLFIP | EESIPR_RTSFIP |
1074 			  EESIPR_PREIP | EESIPR_CERFIP,
1075 
1076 	.apr		= 1,
1077 	.mpr		= 1,
1078 	.tpauser	= 1,
1079 	.hw_swap	= 1,
1080 };
1081 
1082 static struct sh_eth_cpu_data sh771x_data = {
1083 	.soft_reset	= sh_eth_soft_reset,
1084 
1085 	.register_type	= SH_ETH_REG_FAST_SH3_SH2,
1086 
1087 	.edtrr_trns	= EDTRR_TRNS_ETHER,
1088 	.eesipr_value	= EESIPR_RFCOFIP | EESIPR_ECIIP |
1089 			  EESIPR_FTCIP | EESIPR_TDEIP | EESIPR_TFUFIP |
1090 			  EESIPR_FRIP | EESIPR_RDEIP | EESIPR_RFOFIP |
1091 			  0x0000f000 | EESIPR_CNDIP | EESIPR_DLCIP |
1092 			  EESIPR_CDIP | EESIPR_TROIP | EESIPR_RMAFIP |
1093 			  EESIPR_CEEFIP | EESIPR_CELFIP |
1094 			  EESIPR_RRFIP | EESIPR_RTLFIP | EESIPR_RTSFIP |
1095 			  EESIPR_PREIP | EESIPR_CERFIP,
1096 
1097 	.trscer_err_mask = TRSCER_RMAFCE,
1098 
1099 	.tsu		= 1,
1100 	.dual_port	= 1,
1101 };
1102 
1103 static void sh_eth_set_default_cpu_data(struct sh_eth_cpu_data *cd)
1104 {
1105 	if (!cd->ecsr_value)
1106 		cd->ecsr_value = DEFAULT_ECSR_INIT;
1107 
1108 	if (!cd->ecsipr_value)
1109 		cd->ecsipr_value = DEFAULT_ECSIPR_INIT;
1110 
1111 	if (!cd->fcftr_value)
1112 		cd->fcftr_value = DEFAULT_FIFO_F_D_RFF |
1113 				  DEFAULT_FIFO_F_D_RFD;
1114 
1115 	if (!cd->fdr_value)
1116 		cd->fdr_value = DEFAULT_FDR_INIT;
1117 
1118 	if (!cd->tx_check)
1119 		cd->tx_check = DEFAULT_TX_CHECK;
1120 
1121 	if (!cd->eesr_err_check)
1122 		cd->eesr_err_check = DEFAULT_EESR_ERR_CHECK;
1123 
1124 	if (!cd->trscer_err_mask)
1125 		cd->trscer_err_mask = DEFAULT_TRSCER_ERR_MASK;
1126 }
1127 
1128 static void sh_eth_set_receive_align(struct sk_buff *skb)
1129 {
1130 	uintptr_t reserve = (uintptr_t)skb->data & (SH_ETH_RX_ALIGN - 1);
1131 
1132 	if (reserve)
1133 		skb_reserve(skb, SH_ETH_RX_ALIGN - reserve);
1134 }
1135 
1136 /* Program the hardware MAC address from dev->dev_addr. */
1137 static void update_mac_address(struct net_device *ndev)
1138 {
1139 	sh_eth_write(ndev,
1140 		     (ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) |
1141 		     (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR);
1142 	sh_eth_write(ndev,
1143 		     (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]), MALR);
1144 }
1145 
1146 /* Get MAC address from SuperH MAC address register
1147  *
1148  * SuperH's Ethernet device doesn't have 'ROM' to MAC address.
1149  * This driver get MAC address that use by bootloader(U-boot or sh-ipl+g).
1150  * When you want use this device, you must set MAC address in bootloader.
1151  *
1152  */
1153 static void read_mac_address(struct net_device *ndev, unsigned char *mac)
1154 {
1155 	if (mac[0] || mac[1] || mac[2] || mac[3] || mac[4] || mac[5]) {
1156 		eth_hw_addr_set(ndev, mac);
1157 	} else {
1158 		u32 mahr = sh_eth_read(ndev, MAHR);
1159 		u32 malr = sh_eth_read(ndev, MALR);
1160 		u8 addr[ETH_ALEN];
1161 
1162 		addr[0] = (mahr >> 24) & 0xFF;
1163 		addr[1] = (mahr >> 16) & 0xFF;
1164 		addr[2] = (mahr >>  8) & 0xFF;
1165 		addr[3] = (mahr >>  0) & 0xFF;
1166 		addr[4] = (malr >>  8) & 0xFF;
1167 		addr[5] = (malr >>  0) & 0xFF;
1168 		eth_hw_addr_set(ndev, addr);
1169 	}
1170 }
1171 
1172 struct bb_info {
1173 	void (*set_gate)(void *addr);
1174 	struct mdiobb_ctrl ctrl;
1175 	void *addr;
1176 };
1177 
1178 static void sh_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set)
1179 {
1180 	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
1181 	u32 pir;
1182 
1183 	if (bitbang->set_gate)
1184 		bitbang->set_gate(bitbang->addr);
1185 
1186 	pir = ioread32(bitbang->addr);
1187 	if (set)
1188 		pir |=  mask;
1189 	else
1190 		pir &= ~mask;
1191 	iowrite32(pir, bitbang->addr);
1192 }
1193 
1194 /* Data I/O pin control */
1195 static void sh_mmd_ctrl(struct mdiobb_ctrl *ctrl, int bit)
1196 {
1197 	sh_mdio_ctrl(ctrl, PIR_MMD, bit);
1198 }
1199 
1200 /* Set bit data*/
1201 static void sh_set_mdio(struct mdiobb_ctrl *ctrl, int bit)
1202 {
1203 	sh_mdio_ctrl(ctrl, PIR_MDO, bit);
1204 }
1205 
1206 /* Get bit data*/
1207 static int sh_get_mdio(struct mdiobb_ctrl *ctrl)
1208 {
1209 	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
1210 
1211 	if (bitbang->set_gate)
1212 		bitbang->set_gate(bitbang->addr);
1213 
1214 	return (ioread32(bitbang->addr) & PIR_MDI) != 0;
1215 }
1216 
1217 /* MDC pin control */
1218 static void sh_mdc_ctrl(struct mdiobb_ctrl *ctrl, int bit)
1219 {
1220 	sh_mdio_ctrl(ctrl, PIR_MDC, bit);
1221 }
1222 
1223 /* mdio bus control struct */
1224 static const struct mdiobb_ops bb_ops = {
1225 	.owner = THIS_MODULE,
1226 	.set_mdc = sh_mdc_ctrl,
1227 	.set_mdio_dir = sh_mmd_ctrl,
1228 	.set_mdio_data = sh_set_mdio,
1229 	.get_mdio_data = sh_get_mdio,
1230 };
1231 
1232 /* free Tx skb function */
1233 static int sh_eth_tx_free(struct net_device *ndev, bool sent_only)
1234 {
1235 	struct sh_eth_private *mdp = netdev_priv(ndev);
1236 	struct sh_eth_txdesc *txdesc;
1237 	int free_num = 0;
1238 	int entry;
1239 	bool sent;
1240 
1241 	for (; mdp->cur_tx - mdp->dirty_tx > 0; mdp->dirty_tx++) {
1242 		entry = mdp->dirty_tx % mdp->num_tx_ring;
1243 		txdesc = &mdp->tx_ring[entry];
1244 		sent = !(txdesc->status & cpu_to_le32(TD_TACT));
1245 		if (sent_only && !sent)
1246 			break;
1247 		/* TACT bit must be checked before all the following reads */
1248 		dma_rmb();
1249 		netif_info(mdp, tx_done, ndev,
1250 			   "tx entry %d status 0x%08x\n",
1251 			   entry, le32_to_cpu(txdesc->status));
1252 		/* Free the original skb. */
1253 		if (mdp->tx_skbuff[entry]) {
1254 			dma_unmap_single(&mdp->pdev->dev,
1255 					 le32_to_cpu(txdesc->addr),
1256 					 le32_to_cpu(txdesc->len) >> 16,
1257 					 DMA_TO_DEVICE);
1258 			dev_kfree_skb_irq(mdp->tx_skbuff[entry]);
1259 			mdp->tx_skbuff[entry] = NULL;
1260 			free_num++;
1261 		}
1262 		txdesc->status = cpu_to_le32(TD_TFP);
1263 		if (entry >= mdp->num_tx_ring - 1)
1264 			txdesc->status |= cpu_to_le32(TD_TDLE);
1265 
1266 		if (sent) {
1267 			ndev->stats.tx_packets++;
1268 			ndev->stats.tx_bytes += le32_to_cpu(txdesc->len) >> 16;
1269 		}
1270 	}
1271 	return free_num;
1272 }
1273 
1274 /* free skb and descriptor buffer */
1275 static void sh_eth_ring_free(struct net_device *ndev)
1276 {
1277 	struct sh_eth_private *mdp = netdev_priv(ndev);
1278 	int ringsize, i;
1279 
1280 	if (mdp->rx_ring) {
1281 		for (i = 0; i < mdp->num_rx_ring; i++) {
1282 			if (mdp->rx_skbuff[i]) {
1283 				struct sh_eth_rxdesc *rxdesc = &mdp->rx_ring[i];
1284 
1285 				dma_unmap_single(&mdp->pdev->dev,
1286 						 le32_to_cpu(rxdesc->addr),
1287 						 ALIGN(mdp->rx_buf_sz, 32),
1288 						 DMA_FROM_DEVICE);
1289 			}
1290 		}
1291 		ringsize = sizeof(struct sh_eth_rxdesc) * mdp->num_rx_ring;
1292 		dma_free_coherent(&mdp->pdev->dev, ringsize, mdp->rx_ring,
1293 				  mdp->rx_desc_dma);
1294 		mdp->rx_ring = NULL;
1295 	}
1296 
1297 	/* Free Rx skb ringbuffer */
1298 	if (mdp->rx_skbuff) {
1299 		for (i = 0; i < mdp->num_rx_ring; i++)
1300 			dev_kfree_skb(mdp->rx_skbuff[i]);
1301 	}
1302 	kfree(mdp->rx_skbuff);
1303 	mdp->rx_skbuff = NULL;
1304 
1305 	if (mdp->tx_ring) {
1306 		sh_eth_tx_free(ndev, false);
1307 
1308 		ringsize = sizeof(struct sh_eth_txdesc) * mdp->num_tx_ring;
1309 		dma_free_coherent(&mdp->pdev->dev, ringsize, mdp->tx_ring,
1310 				  mdp->tx_desc_dma);
1311 		mdp->tx_ring = NULL;
1312 	}
1313 
1314 	/* Free Tx skb ringbuffer */
1315 	kfree(mdp->tx_skbuff);
1316 	mdp->tx_skbuff = NULL;
1317 }
1318 
1319 /* format skb and descriptor buffer */
1320 static void sh_eth_ring_format(struct net_device *ndev)
1321 {
1322 	struct sh_eth_private *mdp = netdev_priv(ndev);
1323 	int i;
1324 	struct sk_buff *skb;
1325 	struct sh_eth_rxdesc *rxdesc = NULL;
1326 	struct sh_eth_txdesc *txdesc = NULL;
1327 	int rx_ringsize = sizeof(*rxdesc) * mdp->num_rx_ring;
1328 	int tx_ringsize = sizeof(*txdesc) * mdp->num_tx_ring;
1329 	int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN + 32 - 1;
1330 	dma_addr_t dma_addr;
1331 	u32 buf_len;
1332 
1333 	mdp->cur_rx = 0;
1334 	mdp->cur_tx = 0;
1335 	mdp->dirty_rx = 0;
1336 	mdp->dirty_tx = 0;
1337 
1338 	memset(mdp->rx_ring, 0, rx_ringsize);
1339 
1340 	/* build Rx ring buffer */
1341 	for (i = 0; i < mdp->num_rx_ring; i++) {
1342 		/* skb */
1343 		mdp->rx_skbuff[i] = NULL;
1344 		skb = netdev_alloc_skb(ndev, skbuff_size);
1345 		if (skb == NULL)
1346 			break;
1347 		sh_eth_set_receive_align(skb);
1348 
1349 		/* The size of the buffer is a multiple of 32 bytes. */
1350 		buf_len = ALIGN(mdp->rx_buf_sz, 32);
1351 		dma_addr = dma_map_single(&mdp->pdev->dev, skb->data, buf_len,
1352 					  DMA_FROM_DEVICE);
1353 		if (dma_mapping_error(&mdp->pdev->dev, dma_addr)) {
1354 			kfree_skb(skb);
1355 			break;
1356 		}
1357 		mdp->rx_skbuff[i] = skb;
1358 
1359 		/* RX descriptor */
1360 		rxdesc = &mdp->rx_ring[i];
1361 		rxdesc->len = cpu_to_le32(buf_len << 16);
1362 		rxdesc->addr = cpu_to_le32(dma_addr);
1363 		rxdesc->status = cpu_to_le32(RD_RACT | RD_RFP);
1364 
1365 		/* Rx descriptor address set */
1366 		if (i == 0) {
1367 			sh_eth_write(ndev, mdp->rx_desc_dma, RDLAR);
1368 			if (mdp->cd->xdfar_rw)
1369 				sh_eth_write(ndev, mdp->rx_desc_dma, RDFAR);
1370 		}
1371 	}
1372 
1373 	mdp->dirty_rx = (u32) (i - mdp->num_rx_ring);
1374 
1375 	/* Mark the last entry as wrapping the ring. */
1376 	if (rxdesc)
1377 		rxdesc->status |= cpu_to_le32(RD_RDLE);
1378 
1379 	memset(mdp->tx_ring, 0, tx_ringsize);
1380 
1381 	/* build Tx ring buffer */
1382 	for (i = 0; i < mdp->num_tx_ring; i++) {
1383 		mdp->tx_skbuff[i] = NULL;
1384 		txdesc = &mdp->tx_ring[i];
1385 		txdesc->status = cpu_to_le32(TD_TFP);
1386 		txdesc->len = cpu_to_le32(0);
1387 		if (i == 0) {
1388 			/* Tx descriptor address set */
1389 			sh_eth_write(ndev, mdp->tx_desc_dma, TDLAR);
1390 			if (mdp->cd->xdfar_rw)
1391 				sh_eth_write(ndev, mdp->tx_desc_dma, TDFAR);
1392 		}
1393 	}
1394 
1395 	txdesc->status |= cpu_to_le32(TD_TDLE);
1396 }
1397 
1398 /* Get skb and descriptor buffer */
1399 static int sh_eth_ring_init(struct net_device *ndev)
1400 {
1401 	struct sh_eth_private *mdp = netdev_priv(ndev);
1402 	int rx_ringsize, tx_ringsize;
1403 
1404 	/* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
1405 	 * card needs room to do 8 byte alignment, +2 so we can reserve
1406 	 * the first 2 bytes, and +16 gets room for the status word from the
1407 	 * card.
1408 	 */
1409 	mdp->rx_buf_sz = (ndev->mtu <= 1492 ? PKT_BUF_SZ :
1410 			  (((ndev->mtu + 26 + 7) & ~7) + 2 + 16));
1411 	if (mdp->cd->rpadir)
1412 		mdp->rx_buf_sz += NET_IP_ALIGN;
1413 
1414 	/* Allocate RX and TX skb rings */
1415 	mdp->rx_skbuff = kcalloc(mdp->num_rx_ring, sizeof(*mdp->rx_skbuff),
1416 				 GFP_KERNEL);
1417 	if (!mdp->rx_skbuff)
1418 		return -ENOMEM;
1419 
1420 	mdp->tx_skbuff = kcalloc(mdp->num_tx_ring, sizeof(*mdp->tx_skbuff),
1421 				 GFP_KERNEL);
1422 	if (!mdp->tx_skbuff)
1423 		goto ring_free;
1424 
1425 	/* Allocate all Rx descriptors. */
1426 	rx_ringsize = sizeof(struct sh_eth_rxdesc) * mdp->num_rx_ring;
1427 	mdp->rx_ring = dma_alloc_coherent(&mdp->pdev->dev, rx_ringsize,
1428 					  &mdp->rx_desc_dma, GFP_KERNEL);
1429 	if (!mdp->rx_ring)
1430 		goto ring_free;
1431 
1432 	mdp->dirty_rx = 0;
1433 
1434 	/* Allocate all Tx descriptors. */
1435 	tx_ringsize = sizeof(struct sh_eth_txdesc) * mdp->num_tx_ring;
1436 	mdp->tx_ring = dma_alloc_coherent(&mdp->pdev->dev, tx_ringsize,
1437 					  &mdp->tx_desc_dma, GFP_KERNEL);
1438 	if (!mdp->tx_ring)
1439 		goto ring_free;
1440 	return 0;
1441 
1442 ring_free:
1443 	/* Free Rx and Tx skb ring buffer and DMA buffer */
1444 	sh_eth_ring_free(ndev);
1445 
1446 	return -ENOMEM;
1447 }
1448 
1449 static int sh_eth_dev_init(struct net_device *ndev)
1450 {
1451 	struct sh_eth_private *mdp = netdev_priv(ndev);
1452 	int ret;
1453 
1454 	/* Soft Reset */
1455 	ret = mdp->cd->soft_reset(ndev);
1456 	if (ret)
1457 		return ret;
1458 
1459 	if (mdp->cd->rmiimode)
1460 		sh_eth_write(ndev, 0x1, RMIIMODE);
1461 
1462 	/* Descriptor format */
1463 	sh_eth_ring_format(ndev);
1464 	if (mdp->cd->rpadir)
1465 		sh_eth_write(ndev, NET_IP_ALIGN << 16, RPADIR);
1466 
1467 	/* all sh_eth int mask */
1468 	sh_eth_write(ndev, 0, EESIPR);
1469 
1470 #if defined(__LITTLE_ENDIAN)
1471 	if (mdp->cd->hw_swap)
1472 		sh_eth_write(ndev, EDMR_EL, EDMR);
1473 	else
1474 #endif
1475 		sh_eth_write(ndev, 0, EDMR);
1476 
1477 	/* FIFO size set */
1478 	sh_eth_write(ndev, mdp->cd->fdr_value, FDR);
1479 	sh_eth_write(ndev, 0, TFTR);
1480 
1481 	/* Frame recv control (enable multiple-packets per rx irq) */
1482 	sh_eth_write(ndev, RMCR_RNC, RMCR);
1483 
1484 	sh_eth_write(ndev, mdp->cd->trscer_err_mask, TRSCER);
1485 
1486 	/* DMA transfer burst mode */
1487 	if (mdp->cd->nbst)
1488 		sh_eth_modify(ndev, EDMR, EDMR_NBST, EDMR_NBST);
1489 
1490 	/* Burst cycle count upper-limit */
1491 	if (mdp->cd->bculr)
1492 		sh_eth_write(ndev, 0x800, BCULR);
1493 
1494 	sh_eth_write(ndev, mdp->cd->fcftr_value, FCFTR);
1495 
1496 	if (!mdp->cd->no_trimd)
1497 		sh_eth_write(ndev, 0, TRIMD);
1498 
1499 	/* Recv frame limit set register */
1500 	sh_eth_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN,
1501 		     RFLR);
1502 
1503 	sh_eth_modify(ndev, EESR, 0, 0);
1504 	mdp->irq_enabled = true;
1505 	sh_eth_write(ndev, mdp->cd->eesipr_value, EESIPR);
1506 
1507 	/* EMAC Mode: PAUSE prohibition; Duplex; RX Checksum; TX; RX */
1508 	sh_eth_write(ndev, ECMR_ZPF | (mdp->duplex ? ECMR_DM : 0) |
1509 		     (ndev->features & NETIF_F_RXCSUM ? ECMR_RCSC : 0) |
1510 		     ECMR_TE | ECMR_RE, ECMR);
1511 
1512 	if (mdp->cd->set_rate)
1513 		mdp->cd->set_rate(ndev);
1514 
1515 	/* E-MAC Status Register clear */
1516 	sh_eth_write(ndev, mdp->cd->ecsr_value, ECSR);
1517 
1518 	/* E-MAC Interrupt Enable register */
1519 	sh_eth_write(ndev, mdp->cd->ecsipr_value, ECSIPR);
1520 
1521 	/* Set MAC address */
1522 	update_mac_address(ndev);
1523 
1524 	/* mask reset */
1525 	if (mdp->cd->apr)
1526 		sh_eth_write(ndev, 1, APR);
1527 	if (mdp->cd->mpr)
1528 		sh_eth_write(ndev, 1, MPR);
1529 	if (mdp->cd->tpauser)
1530 		sh_eth_write(ndev, TPAUSER_UNLIMITED, TPAUSER);
1531 
1532 	/* Setting the Rx mode will start the Rx process. */
1533 	sh_eth_write(ndev, EDRRR_R, EDRRR);
1534 
1535 	return ret;
1536 }
1537 
1538 static void sh_eth_dev_exit(struct net_device *ndev)
1539 {
1540 	struct sh_eth_private *mdp = netdev_priv(ndev);
1541 	int i;
1542 
1543 	/* Deactivate all TX descriptors, so DMA should stop at next
1544 	 * packet boundary if it's currently running
1545 	 */
1546 	for (i = 0; i < mdp->num_tx_ring; i++)
1547 		mdp->tx_ring[i].status &= ~cpu_to_le32(TD_TACT);
1548 
1549 	/* Disable TX FIFO egress to MAC */
1550 	sh_eth_rcv_snd_disable(ndev);
1551 
1552 	/* Stop RX DMA at next packet boundary */
1553 	sh_eth_write(ndev, 0, EDRRR);
1554 
1555 	/* Aside from TX DMA, we can't tell when the hardware is
1556 	 * really stopped, so we need to reset to make sure.
1557 	 * Before doing that, wait for long enough to *probably*
1558 	 * finish transmitting the last packet and poll stats.
1559 	 */
1560 	msleep(2); /* max frame time at 10 Mbps < 1250 us */
1561 	sh_eth_get_stats(ndev);
1562 	mdp->cd->soft_reset(ndev);
1563 
1564 	/* Set the RMII mode again if required */
1565 	if (mdp->cd->rmiimode)
1566 		sh_eth_write(ndev, 0x1, RMIIMODE);
1567 
1568 	/* Set MAC address again */
1569 	update_mac_address(ndev);
1570 }
1571 
1572 static void sh_eth_rx_csum(struct sk_buff *skb)
1573 {
1574 	u8 *hw_csum;
1575 
1576 	/* The hardware checksum is 2 bytes appended to packet data */
1577 	if (unlikely(skb->len < sizeof(__sum16)))
1578 		return;
1579 	hw_csum = skb_tail_pointer(skb) - sizeof(__sum16);
1580 	skb->csum = csum_unfold((__force __sum16)get_unaligned_le16(hw_csum));
1581 	skb->ip_summed = CHECKSUM_COMPLETE;
1582 	skb_trim(skb, skb->len - sizeof(__sum16));
1583 }
1584 
1585 /* Packet receive function */
1586 static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
1587 {
1588 	struct sh_eth_private *mdp = netdev_priv(ndev);
1589 	struct sh_eth_rxdesc *rxdesc;
1590 
1591 	int entry = mdp->cur_rx % mdp->num_rx_ring;
1592 	int boguscnt = (mdp->dirty_rx + mdp->num_rx_ring) - mdp->cur_rx;
1593 	int limit;
1594 	struct sk_buff *skb;
1595 	u32 desc_status;
1596 	int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN + 32 - 1;
1597 	dma_addr_t dma_addr;
1598 	u16 pkt_len;
1599 	u32 buf_len;
1600 
1601 	boguscnt = min(boguscnt, *quota);
1602 	limit = boguscnt;
1603 	rxdesc = &mdp->rx_ring[entry];
1604 	while (!(rxdesc->status & cpu_to_le32(RD_RACT))) {
1605 		/* RACT bit must be checked before all the following reads */
1606 		dma_rmb();
1607 		desc_status = le32_to_cpu(rxdesc->status);
1608 		pkt_len = le32_to_cpu(rxdesc->len) & RD_RFL;
1609 
1610 		if (--boguscnt < 0)
1611 			break;
1612 
1613 		netif_info(mdp, rx_status, ndev,
1614 			   "rx entry %d status 0x%08x len %d\n",
1615 			   entry, desc_status, pkt_len);
1616 
1617 		if (!(desc_status & RDFEND))
1618 			ndev->stats.rx_length_errors++;
1619 
1620 		/* In case of almost all GETHER/ETHERs, the Receive Frame State
1621 		 * (RFS) bits in the Receive Descriptor 0 are from bit 9 to
1622 		 * bit 0. However, in case of the R8A7740 and R7S72100
1623 		 * the RFS bits are from bit 25 to bit 16. So, the
1624 		 * driver needs right shifting by 16.
1625 		 */
1626 		if (mdp->cd->csmr)
1627 			desc_status >>= 16;
1628 
1629 		skb = mdp->rx_skbuff[entry];
1630 		if (desc_status & (RD_RFS1 | RD_RFS2 | RD_RFS3 | RD_RFS4 |
1631 				   RD_RFS5 | RD_RFS6 | RD_RFS10)) {
1632 			ndev->stats.rx_errors++;
1633 			if (desc_status & RD_RFS1)
1634 				ndev->stats.rx_crc_errors++;
1635 			if (desc_status & RD_RFS2)
1636 				ndev->stats.rx_frame_errors++;
1637 			if (desc_status & RD_RFS3)
1638 				ndev->stats.rx_length_errors++;
1639 			if (desc_status & RD_RFS4)
1640 				ndev->stats.rx_length_errors++;
1641 			if (desc_status & RD_RFS6)
1642 				ndev->stats.rx_missed_errors++;
1643 			if (desc_status & RD_RFS10)
1644 				ndev->stats.rx_over_errors++;
1645 		} else	if (skb) {
1646 			dma_addr = le32_to_cpu(rxdesc->addr);
1647 			if (!mdp->cd->hw_swap)
1648 				sh_eth_soft_swap(
1649 					phys_to_virt(ALIGN(dma_addr, 4)),
1650 					pkt_len + 2);
1651 			mdp->rx_skbuff[entry] = NULL;
1652 			if (mdp->cd->rpadir)
1653 				skb_reserve(skb, NET_IP_ALIGN);
1654 			dma_unmap_single(&mdp->pdev->dev, dma_addr,
1655 					 ALIGN(mdp->rx_buf_sz, 32),
1656 					 DMA_FROM_DEVICE);
1657 			skb_put(skb, pkt_len);
1658 			skb->protocol = eth_type_trans(skb, ndev);
1659 			if (ndev->features & NETIF_F_RXCSUM)
1660 				sh_eth_rx_csum(skb);
1661 			netif_receive_skb(skb);
1662 			ndev->stats.rx_packets++;
1663 			ndev->stats.rx_bytes += pkt_len;
1664 			if (desc_status & RD_RFS8)
1665 				ndev->stats.multicast++;
1666 		}
1667 		entry = (++mdp->cur_rx) % mdp->num_rx_ring;
1668 		rxdesc = &mdp->rx_ring[entry];
1669 	}
1670 
1671 	/* Refill the Rx ring buffers. */
1672 	for (; mdp->cur_rx - mdp->dirty_rx > 0; mdp->dirty_rx++) {
1673 		entry = mdp->dirty_rx % mdp->num_rx_ring;
1674 		rxdesc = &mdp->rx_ring[entry];
1675 		/* The size of the buffer is 32 byte boundary. */
1676 		buf_len = ALIGN(mdp->rx_buf_sz, 32);
1677 		rxdesc->len = cpu_to_le32(buf_len << 16);
1678 
1679 		if (mdp->rx_skbuff[entry] == NULL) {
1680 			skb = netdev_alloc_skb(ndev, skbuff_size);
1681 			if (skb == NULL)
1682 				break;	/* Better luck next round. */
1683 			sh_eth_set_receive_align(skb);
1684 			dma_addr = dma_map_single(&mdp->pdev->dev, skb->data,
1685 						  buf_len, DMA_FROM_DEVICE);
1686 			if (dma_mapping_error(&mdp->pdev->dev, dma_addr)) {
1687 				kfree_skb(skb);
1688 				break;
1689 			}
1690 			mdp->rx_skbuff[entry] = skb;
1691 
1692 			skb_checksum_none_assert(skb);
1693 			rxdesc->addr = cpu_to_le32(dma_addr);
1694 		}
1695 		dma_wmb(); /* RACT bit must be set after all the above writes */
1696 		if (entry >= mdp->num_rx_ring - 1)
1697 			rxdesc->status |=
1698 				cpu_to_le32(RD_RACT | RD_RFP | RD_RDLE);
1699 		else
1700 			rxdesc->status |= cpu_to_le32(RD_RACT | RD_RFP);
1701 	}
1702 
1703 	/* Restart Rx engine if stopped. */
1704 	/* If we don't need to check status, don't. -KDU */
1705 	if (!(sh_eth_read(ndev, EDRRR) & EDRRR_R)) {
1706 		/* fix the values for the next receiving if RDE is set */
1707 		if (intr_status & EESR_RDE && !mdp->cd->no_xdfar) {
1708 			u32 count = (sh_eth_read(ndev, RDFAR) -
1709 				     sh_eth_read(ndev, RDLAR)) >> 4;
1710 
1711 			mdp->cur_rx = count;
1712 			mdp->dirty_rx = count;
1713 		}
1714 		sh_eth_write(ndev, EDRRR_R, EDRRR);
1715 	}
1716 
1717 	*quota -= limit - boguscnt - 1;
1718 
1719 	return *quota <= 0;
1720 }
1721 
1722 static void sh_eth_rcv_snd_disable(struct net_device *ndev)
1723 {
1724 	/* disable tx and rx */
1725 	sh_eth_modify(ndev, ECMR, ECMR_RE | ECMR_TE, 0);
1726 }
1727 
1728 static void sh_eth_rcv_snd_enable(struct net_device *ndev)
1729 {
1730 	/* enable tx and rx */
1731 	sh_eth_modify(ndev, ECMR, ECMR_RE | ECMR_TE, ECMR_RE | ECMR_TE);
1732 }
1733 
1734 /* E-MAC interrupt handler */
1735 static void sh_eth_emac_interrupt(struct net_device *ndev)
1736 {
1737 	struct sh_eth_private *mdp = netdev_priv(ndev);
1738 	u32 felic_stat;
1739 	u32 link_stat;
1740 
1741 	felic_stat = sh_eth_read(ndev, ECSR) & sh_eth_read(ndev, ECSIPR);
1742 	sh_eth_write(ndev, felic_stat, ECSR);	/* clear int */
1743 	if (felic_stat & ECSR_ICD)
1744 		ndev->stats.tx_carrier_errors++;
1745 	if (felic_stat & ECSR_MPD)
1746 		pm_wakeup_event(&mdp->pdev->dev, 0);
1747 	if (felic_stat & ECSR_LCHNG) {
1748 		/* Link Changed */
1749 		if (mdp->cd->no_psr || mdp->no_ether_link)
1750 			return;
1751 		link_stat = sh_eth_read(ndev, PSR);
1752 		if (mdp->ether_link_active_low)
1753 			link_stat = ~link_stat;
1754 		if (!(link_stat & PSR_LMON)) {
1755 			sh_eth_rcv_snd_disable(ndev);
1756 		} else {
1757 			/* Link Up */
1758 			sh_eth_modify(ndev, EESIPR, EESIPR_ECIIP, 0);
1759 			/* clear int */
1760 			sh_eth_modify(ndev, ECSR, 0, 0);
1761 			sh_eth_modify(ndev, EESIPR, EESIPR_ECIIP, EESIPR_ECIIP);
1762 			/* enable tx and rx */
1763 			sh_eth_rcv_snd_enable(ndev);
1764 		}
1765 	}
1766 }
1767 
1768 /* error control function */
1769 static void sh_eth_error(struct net_device *ndev, u32 intr_status)
1770 {
1771 	struct sh_eth_private *mdp = netdev_priv(ndev);
1772 	u32 mask;
1773 
1774 	if (intr_status & EESR_TWB) {
1775 		/* Unused write back interrupt */
1776 		if (intr_status & EESR_TABT) {	/* Transmit Abort int */
1777 			ndev->stats.tx_aborted_errors++;
1778 			netif_err(mdp, tx_err, ndev, "Transmit Abort\n");
1779 		}
1780 	}
1781 
1782 	if (intr_status & EESR_RABT) {
1783 		/* Receive Abort int */
1784 		if (intr_status & EESR_RFRMER) {
1785 			/* Receive Frame Overflow int */
1786 			ndev->stats.rx_frame_errors++;
1787 		}
1788 	}
1789 
1790 	if (intr_status & EESR_TDE) {
1791 		/* Transmit Descriptor Empty int */
1792 		ndev->stats.tx_fifo_errors++;
1793 		netif_err(mdp, tx_err, ndev, "Transmit Descriptor Empty\n");
1794 	}
1795 
1796 	if (intr_status & EESR_TFE) {
1797 		/* FIFO under flow */
1798 		ndev->stats.tx_fifo_errors++;
1799 		netif_err(mdp, tx_err, ndev, "Transmit FIFO Under flow\n");
1800 	}
1801 
1802 	if (intr_status & EESR_RDE) {
1803 		/* Receive Descriptor Empty int */
1804 		ndev->stats.rx_over_errors++;
1805 	}
1806 
1807 	if (intr_status & EESR_RFE) {
1808 		/* Receive FIFO Overflow int */
1809 		ndev->stats.rx_fifo_errors++;
1810 	}
1811 
1812 	if (!mdp->cd->no_ade && (intr_status & EESR_ADE)) {
1813 		/* Address Error */
1814 		ndev->stats.tx_fifo_errors++;
1815 		netif_err(mdp, tx_err, ndev, "Address Error\n");
1816 	}
1817 
1818 	mask = EESR_TWB | EESR_TABT | EESR_ADE | EESR_TDE | EESR_TFE;
1819 	if (mdp->cd->no_ade)
1820 		mask &= ~EESR_ADE;
1821 	if (intr_status & mask) {
1822 		/* Tx error */
1823 		u32 edtrr = sh_eth_read(ndev, EDTRR);
1824 
1825 		/* dmesg */
1826 		netdev_err(ndev, "TX error. status=%8.8x cur_tx=%8.8x dirty_tx=%8.8x state=%8.8x EDTRR=%8.8x.\n",
1827 			   intr_status, mdp->cur_tx, mdp->dirty_tx,
1828 			   (u32)ndev->state, edtrr);
1829 		/* dirty buffer free */
1830 		sh_eth_tx_free(ndev, true);
1831 
1832 		/* SH7712 BUG */
1833 		if (edtrr ^ mdp->cd->edtrr_trns) {
1834 			/* tx dma start */
1835 			sh_eth_write(ndev, mdp->cd->edtrr_trns, EDTRR);
1836 		}
1837 		/* wakeup */
1838 		netif_wake_queue(ndev);
1839 	}
1840 }
1841 
1842 static irqreturn_t sh_eth_interrupt(int irq, void *netdev)
1843 {
1844 	struct net_device *ndev = netdev;
1845 	struct sh_eth_private *mdp = netdev_priv(ndev);
1846 	struct sh_eth_cpu_data *cd = mdp->cd;
1847 	irqreturn_t ret = IRQ_NONE;
1848 	u32 intr_status, intr_enable;
1849 
1850 	spin_lock(&mdp->lock);
1851 
1852 	/* Get interrupt status */
1853 	intr_status = sh_eth_read(ndev, EESR);
1854 	/* Mask it with the interrupt mask, forcing ECI interrupt  to be always
1855 	 * enabled since it's the one that  comes  thru regardless of the mask,
1856 	 * and  we need to fully handle it  in sh_eth_emac_interrupt() in order
1857 	 * to quench it as it doesn't get cleared by just writing 1 to the  ECI
1858 	 * bit...
1859 	 */
1860 	intr_enable = sh_eth_read(ndev, EESIPR);
1861 	intr_status &= intr_enable | EESIPR_ECIIP;
1862 	if (intr_status & (EESR_RX_CHECK | cd->tx_check | EESR_ECI |
1863 			   cd->eesr_err_check))
1864 		ret = IRQ_HANDLED;
1865 	else
1866 		goto out;
1867 
1868 	if (unlikely(!mdp->irq_enabled)) {
1869 		sh_eth_write(ndev, 0, EESIPR);
1870 		goto out;
1871 	}
1872 
1873 	if (intr_status & EESR_RX_CHECK) {
1874 		if (napi_schedule_prep(&mdp->napi)) {
1875 			/* Mask Rx interrupts */
1876 			sh_eth_write(ndev, intr_enable & ~EESR_RX_CHECK,
1877 				     EESIPR);
1878 			__napi_schedule(&mdp->napi);
1879 		} else {
1880 			netdev_warn(ndev,
1881 				    "ignoring interrupt, status 0x%08x, mask 0x%08x.\n",
1882 				    intr_status, intr_enable);
1883 		}
1884 	}
1885 
1886 	/* Tx Check */
1887 	if (intr_status & cd->tx_check) {
1888 		/* Clear Tx interrupts */
1889 		sh_eth_write(ndev, intr_status & cd->tx_check, EESR);
1890 
1891 		sh_eth_tx_free(ndev, true);
1892 		netif_wake_queue(ndev);
1893 	}
1894 
1895 	/* E-MAC interrupt */
1896 	if (intr_status & EESR_ECI)
1897 		sh_eth_emac_interrupt(ndev);
1898 
1899 	if (intr_status & cd->eesr_err_check) {
1900 		/* Clear error interrupts */
1901 		sh_eth_write(ndev, intr_status & cd->eesr_err_check, EESR);
1902 
1903 		sh_eth_error(ndev, intr_status);
1904 	}
1905 
1906 out:
1907 	spin_unlock(&mdp->lock);
1908 
1909 	return ret;
1910 }
1911 
1912 static int sh_eth_poll(struct napi_struct *napi, int budget)
1913 {
1914 	struct sh_eth_private *mdp = container_of(napi, struct sh_eth_private,
1915 						  napi);
1916 	struct net_device *ndev = napi->dev;
1917 	int quota = budget;
1918 	u32 intr_status;
1919 
1920 	for (;;) {
1921 		intr_status = sh_eth_read(ndev, EESR);
1922 		if (!(intr_status & EESR_RX_CHECK))
1923 			break;
1924 		/* Clear Rx interrupts */
1925 		sh_eth_write(ndev, intr_status & EESR_RX_CHECK, EESR);
1926 
1927 		if (sh_eth_rx(ndev, intr_status, &quota))
1928 			goto out;
1929 	}
1930 
1931 	napi_complete(napi);
1932 
1933 	/* Reenable Rx interrupts */
1934 	if (mdp->irq_enabled)
1935 		sh_eth_write(ndev, mdp->cd->eesipr_value, EESIPR);
1936 out:
1937 	return budget - quota;
1938 }
1939 
1940 /* PHY state control function */
1941 static void sh_eth_adjust_link(struct net_device *ndev)
1942 {
1943 	struct sh_eth_private *mdp = netdev_priv(ndev);
1944 	struct phy_device *phydev = ndev->phydev;
1945 	unsigned long flags;
1946 	int new_state = 0;
1947 
1948 	spin_lock_irqsave(&mdp->lock, flags);
1949 
1950 	/* Disable TX and RX right over here, if E-MAC change is ignored */
1951 	if (mdp->cd->no_psr || mdp->no_ether_link)
1952 		sh_eth_rcv_snd_disable(ndev);
1953 
1954 	if (phydev->link) {
1955 		if (phydev->duplex != mdp->duplex) {
1956 			new_state = 1;
1957 			mdp->duplex = phydev->duplex;
1958 			if (mdp->cd->set_duplex)
1959 				mdp->cd->set_duplex(ndev);
1960 		}
1961 
1962 		if (phydev->speed != mdp->speed) {
1963 			new_state = 1;
1964 			mdp->speed = phydev->speed;
1965 			if (mdp->cd->set_rate)
1966 				mdp->cd->set_rate(ndev);
1967 		}
1968 		if (!mdp->link) {
1969 			sh_eth_modify(ndev, ECMR, ECMR_TXF, 0);
1970 			new_state = 1;
1971 			mdp->link = phydev->link;
1972 		}
1973 	} else if (mdp->link) {
1974 		new_state = 1;
1975 		mdp->link = 0;
1976 		mdp->speed = 0;
1977 		mdp->duplex = -1;
1978 	}
1979 
1980 	/* Enable TX and RX right over here, if E-MAC change is ignored */
1981 	if ((mdp->cd->no_psr || mdp->no_ether_link) && phydev->link)
1982 		sh_eth_rcv_snd_enable(ndev);
1983 
1984 	spin_unlock_irqrestore(&mdp->lock, flags);
1985 
1986 	if (new_state && netif_msg_link(mdp))
1987 		phy_print_status(phydev);
1988 }
1989 
1990 /* PHY init function */
1991 static int sh_eth_phy_init(struct net_device *ndev)
1992 {
1993 	struct device_node *np = ndev->dev.parent->of_node;
1994 	struct sh_eth_private *mdp = netdev_priv(ndev);
1995 	struct phy_device *phydev;
1996 
1997 	mdp->link = 0;
1998 	mdp->speed = 0;
1999 	mdp->duplex = -1;
2000 
2001 	/* Try connect to PHY */
2002 	if (np) {
2003 		struct device_node *pn;
2004 
2005 		pn = of_parse_phandle(np, "phy-handle", 0);
2006 		phydev = of_phy_connect(ndev, pn,
2007 					sh_eth_adjust_link, 0,
2008 					mdp->phy_interface);
2009 
2010 		of_node_put(pn);
2011 		if (!phydev)
2012 			phydev = ERR_PTR(-ENOENT);
2013 	} else {
2014 		char phy_id[MII_BUS_ID_SIZE + 3];
2015 
2016 		snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
2017 			 mdp->mii_bus->id, mdp->phy_id);
2018 
2019 		phydev = phy_connect(ndev, phy_id, sh_eth_adjust_link,
2020 				     mdp->phy_interface);
2021 	}
2022 
2023 	if (IS_ERR(phydev)) {
2024 		netdev_err(ndev, "failed to connect PHY\n");
2025 		return PTR_ERR(phydev);
2026 	}
2027 
2028 	/* mask with MAC supported features */
2029 	if (mdp->cd->register_type != SH_ETH_REG_GIGABIT) {
2030 		int err = phy_set_max_speed(phydev, SPEED_100);
2031 		if (err) {
2032 			netdev_err(ndev, "failed to limit PHY to 100 Mbit/s\n");
2033 			phy_disconnect(phydev);
2034 			return err;
2035 		}
2036 	}
2037 
2038 	phy_attached_info(phydev);
2039 
2040 	return 0;
2041 }
2042 
2043 /* PHY control start function */
2044 static int sh_eth_phy_start(struct net_device *ndev)
2045 {
2046 	int ret;
2047 
2048 	ret = sh_eth_phy_init(ndev);
2049 	if (ret)
2050 		return ret;
2051 
2052 	phy_start(ndev->phydev);
2053 
2054 	return 0;
2055 }
2056 
2057 /* If it is ever necessary to increase SH_ETH_REG_DUMP_MAX_REGS, the
2058  * version must be bumped as well.  Just adding registers up to that
2059  * limit is fine, as long as the existing register indices don't
2060  * change.
2061  */
2062 #define SH_ETH_REG_DUMP_VERSION		1
2063 #define SH_ETH_REG_DUMP_MAX_REGS	256
2064 
2065 static size_t __sh_eth_get_regs(struct net_device *ndev, u32 *buf)
2066 {
2067 	struct sh_eth_private *mdp = netdev_priv(ndev);
2068 	struct sh_eth_cpu_data *cd = mdp->cd;
2069 	u32 *valid_map;
2070 	size_t len;
2071 
2072 	BUILD_BUG_ON(SH_ETH_MAX_REGISTER_OFFSET > SH_ETH_REG_DUMP_MAX_REGS);
2073 
2074 	/* Dump starts with a bitmap that tells ethtool which
2075 	 * registers are defined for this chip.
2076 	 */
2077 	len = DIV_ROUND_UP(SH_ETH_REG_DUMP_MAX_REGS, 32);
2078 	if (buf) {
2079 		valid_map = buf;
2080 		buf += len;
2081 	} else {
2082 		valid_map = NULL;
2083 	}
2084 
2085 	/* Add a register to the dump, if it has a defined offset.
2086 	 * This automatically skips most undefined registers, but for
2087 	 * some it is also necessary to check a capability flag in
2088 	 * struct sh_eth_cpu_data.
2089 	 */
2090 #define mark_reg_valid(reg) valid_map[reg / 32] |= 1U << (reg % 32)
2091 #define add_reg_from(reg, read_expr) do {				\
2092 		if (mdp->reg_offset[reg] != SH_ETH_OFFSET_INVALID) {	\
2093 			if (buf) {					\
2094 				mark_reg_valid(reg);			\
2095 				*buf++ = read_expr;			\
2096 			}						\
2097 			++len;						\
2098 		}							\
2099 	} while (0)
2100 #define add_reg(reg) add_reg_from(reg, sh_eth_read(ndev, reg))
2101 #define add_tsu_reg(reg) add_reg_from(reg, sh_eth_tsu_read(mdp, reg))
2102 
2103 	add_reg(EDSR);
2104 	add_reg(EDMR);
2105 	add_reg(EDTRR);
2106 	add_reg(EDRRR);
2107 	add_reg(EESR);
2108 	add_reg(EESIPR);
2109 	add_reg(TDLAR);
2110 	if (!cd->no_xdfar)
2111 		add_reg(TDFAR);
2112 	add_reg(TDFXR);
2113 	add_reg(TDFFR);
2114 	add_reg(RDLAR);
2115 	if (!cd->no_xdfar)
2116 		add_reg(RDFAR);
2117 	add_reg(RDFXR);
2118 	add_reg(RDFFR);
2119 	add_reg(TRSCER);
2120 	add_reg(RMFCR);
2121 	add_reg(TFTR);
2122 	add_reg(FDR);
2123 	add_reg(RMCR);
2124 	add_reg(TFUCR);
2125 	add_reg(RFOCR);
2126 	if (cd->rmiimode)
2127 		add_reg(RMIIMODE);
2128 	add_reg(FCFTR);
2129 	if (cd->rpadir)
2130 		add_reg(RPADIR);
2131 	if (!cd->no_trimd)
2132 		add_reg(TRIMD);
2133 	add_reg(ECMR);
2134 	add_reg(ECSR);
2135 	add_reg(ECSIPR);
2136 	add_reg(PIR);
2137 	if (!cd->no_psr)
2138 		add_reg(PSR);
2139 	add_reg(RDMLR);
2140 	add_reg(RFLR);
2141 	add_reg(IPGR);
2142 	if (cd->apr)
2143 		add_reg(APR);
2144 	if (cd->mpr)
2145 		add_reg(MPR);
2146 	add_reg(RFCR);
2147 	add_reg(RFCF);
2148 	if (cd->tpauser)
2149 		add_reg(TPAUSER);
2150 	add_reg(TPAUSECR);
2151 	if (cd->gecmr)
2152 		add_reg(GECMR);
2153 	if (cd->bculr)
2154 		add_reg(BCULR);
2155 	add_reg(MAHR);
2156 	add_reg(MALR);
2157 	if (!cd->no_tx_cntrs) {
2158 		add_reg(TROCR);
2159 		add_reg(CDCR);
2160 		add_reg(LCCR);
2161 		add_reg(CNDCR);
2162 	}
2163 	add_reg(CEFCR);
2164 	add_reg(FRECR);
2165 	add_reg(TSFRCR);
2166 	add_reg(TLFRCR);
2167 	if (cd->cexcr) {
2168 		add_reg(CERCR);
2169 		add_reg(CEECR);
2170 	}
2171 	add_reg(MAFCR);
2172 	if (cd->rtrate)
2173 		add_reg(RTRATE);
2174 	if (cd->csmr)
2175 		add_reg(CSMR);
2176 	if (cd->select_mii)
2177 		add_reg(RMII_MII);
2178 	if (cd->tsu) {
2179 		add_tsu_reg(ARSTR);
2180 		add_tsu_reg(TSU_CTRST);
2181 		if (cd->dual_port) {
2182 			add_tsu_reg(TSU_FWEN0);
2183 			add_tsu_reg(TSU_FWEN1);
2184 			add_tsu_reg(TSU_FCM);
2185 			add_tsu_reg(TSU_BSYSL0);
2186 			add_tsu_reg(TSU_BSYSL1);
2187 			add_tsu_reg(TSU_PRISL0);
2188 			add_tsu_reg(TSU_PRISL1);
2189 			add_tsu_reg(TSU_FWSL0);
2190 			add_tsu_reg(TSU_FWSL1);
2191 		}
2192 		add_tsu_reg(TSU_FWSLC);
2193 		if (cd->dual_port) {
2194 			add_tsu_reg(TSU_QTAGM0);
2195 			add_tsu_reg(TSU_QTAGM1);
2196 			add_tsu_reg(TSU_FWSR);
2197 			add_tsu_reg(TSU_FWINMK);
2198 			add_tsu_reg(TSU_ADQT0);
2199 			add_tsu_reg(TSU_ADQT1);
2200 			add_tsu_reg(TSU_VTAG0);
2201 			add_tsu_reg(TSU_VTAG1);
2202 		}
2203 		add_tsu_reg(TSU_ADSBSY);
2204 		add_tsu_reg(TSU_TEN);
2205 		add_tsu_reg(TSU_POST1);
2206 		add_tsu_reg(TSU_POST2);
2207 		add_tsu_reg(TSU_POST3);
2208 		add_tsu_reg(TSU_POST4);
2209 		/* This is the start of a table, not just a single register. */
2210 		if (buf) {
2211 			unsigned int i;
2212 
2213 			mark_reg_valid(TSU_ADRH0);
2214 			for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES * 2; i++)
2215 				*buf++ = ioread32(mdp->tsu_addr +
2216 						  mdp->reg_offset[TSU_ADRH0] +
2217 						  i * 4);
2218 		}
2219 		len += SH_ETH_TSU_CAM_ENTRIES * 2;
2220 	}
2221 
2222 #undef mark_reg_valid
2223 #undef add_reg_from
2224 #undef add_reg
2225 #undef add_tsu_reg
2226 
2227 	return len * 4;
2228 }
2229 
2230 static int sh_eth_get_regs_len(struct net_device *ndev)
2231 {
2232 	return __sh_eth_get_regs(ndev, NULL);
2233 }
2234 
2235 static void sh_eth_get_regs(struct net_device *ndev, struct ethtool_regs *regs,
2236 			    void *buf)
2237 {
2238 	struct sh_eth_private *mdp = netdev_priv(ndev);
2239 
2240 	regs->version = SH_ETH_REG_DUMP_VERSION;
2241 
2242 	pm_runtime_get_sync(&mdp->pdev->dev);
2243 	__sh_eth_get_regs(ndev, buf);
2244 	pm_runtime_put_sync(&mdp->pdev->dev);
2245 }
2246 
2247 static u32 sh_eth_get_msglevel(struct net_device *ndev)
2248 {
2249 	struct sh_eth_private *mdp = netdev_priv(ndev);
2250 	return mdp->msg_enable;
2251 }
2252 
2253 static void sh_eth_set_msglevel(struct net_device *ndev, u32 value)
2254 {
2255 	struct sh_eth_private *mdp = netdev_priv(ndev);
2256 	mdp->msg_enable = value;
2257 }
2258 
2259 static const char sh_eth_gstrings_stats[][ETH_GSTRING_LEN] = {
2260 	"rx_current", "tx_current",
2261 	"rx_dirty", "tx_dirty",
2262 };
2263 #define SH_ETH_STATS_LEN  ARRAY_SIZE(sh_eth_gstrings_stats)
2264 
2265 static int sh_eth_get_sset_count(struct net_device *netdev, int sset)
2266 {
2267 	switch (sset) {
2268 	case ETH_SS_STATS:
2269 		return SH_ETH_STATS_LEN;
2270 	default:
2271 		return -EOPNOTSUPP;
2272 	}
2273 }
2274 
2275 static void sh_eth_get_ethtool_stats(struct net_device *ndev,
2276 				     struct ethtool_stats *stats, u64 *data)
2277 {
2278 	struct sh_eth_private *mdp = netdev_priv(ndev);
2279 	int i = 0;
2280 
2281 	/* device-specific stats */
2282 	data[i++] = mdp->cur_rx;
2283 	data[i++] = mdp->cur_tx;
2284 	data[i++] = mdp->dirty_rx;
2285 	data[i++] = mdp->dirty_tx;
2286 }
2287 
2288 static void sh_eth_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
2289 {
2290 	switch (stringset) {
2291 	case ETH_SS_STATS:
2292 		memcpy(data, sh_eth_gstrings_stats,
2293 		       sizeof(sh_eth_gstrings_stats));
2294 		break;
2295 	}
2296 }
2297 
2298 static void sh_eth_get_ringparam(struct net_device *ndev,
2299 				 struct ethtool_ringparam *ring,
2300 				 struct kernel_ethtool_ringparam *kernel_ring,
2301 				 struct netlink_ext_ack *extack)
2302 {
2303 	struct sh_eth_private *mdp = netdev_priv(ndev);
2304 
2305 	ring->rx_max_pending = RX_RING_MAX;
2306 	ring->tx_max_pending = TX_RING_MAX;
2307 	ring->rx_pending = mdp->num_rx_ring;
2308 	ring->tx_pending = mdp->num_tx_ring;
2309 }
2310 
2311 static int sh_eth_set_ringparam(struct net_device *ndev,
2312 				struct ethtool_ringparam *ring,
2313 				struct kernel_ethtool_ringparam *kernel_ring,
2314 				struct netlink_ext_ack *extack)
2315 {
2316 	struct sh_eth_private *mdp = netdev_priv(ndev);
2317 	int ret;
2318 
2319 	if (ring->tx_pending > TX_RING_MAX ||
2320 	    ring->rx_pending > RX_RING_MAX ||
2321 	    ring->tx_pending < TX_RING_MIN ||
2322 	    ring->rx_pending < RX_RING_MIN)
2323 		return -EINVAL;
2324 	if (ring->rx_mini_pending || ring->rx_jumbo_pending)
2325 		return -EINVAL;
2326 
2327 	if (netif_running(ndev)) {
2328 		netif_device_detach(ndev);
2329 		netif_tx_disable(ndev);
2330 
2331 		/* Serialise with the interrupt handler and NAPI, then
2332 		 * disable interrupts.  We have to clear the
2333 		 * irq_enabled flag first to ensure that interrupts
2334 		 * won't be re-enabled.
2335 		 */
2336 		mdp->irq_enabled = false;
2337 		synchronize_irq(ndev->irq);
2338 		napi_synchronize(&mdp->napi);
2339 		sh_eth_write(ndev, 0x0000, EESIPR);
2340 
2341 		sh_eth_dev_exit(ndev);
2342 
2343 		/* Free all the skbuffs in the Rx queue and the DMA buffers. */
2344 		sh_eth_ring_free(ndev);
2345 	}
2346 
2347 	/* Set new parameters */
2348 	mdp->num_rx_ring = ring->rx_pending;
2349 	mdp->num_tx_ring = ring->tx_pending;
2350 
2351 	if (netif_running(ndev)) {
2352 		ret = sh_eth_ring_init(ndev);
2353 		if (ret < 0) {
2354 			netdev_err(ndev, "%s: sh_eth_ring_init failed.\n",
2355 				   __func__);
2356 			return ret;
2357 		}
2358 		ret = sh_eth_dev_init(ndev);
2359 		if (ret < 0) {
2360 			netdev_err(ndev, "%s: sh_eth_dev_init failed.\n",
2361 				   __func__);
2362 			return ret;
2363 		}
2364 
2365 		netif_device_attach(ndev);
2366 	}
2367 
2368 	return 0;
2369 }
2370 
2371 static void sh_eth_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
2372 {
2373 	struct sh_eth_private *mdp = netdev_priv(ndev);
2374 
2375 	wol->supported = 0;
2376 	wol->wolopts = 0;
2377 
2378 	if (mdp->cd->magic) {
2379 		wol->supported = WAKE_MAGIC;
2380 		wol->wolopts = mdp->wol_enabled ? WAKE_MAGIC : 0;
2381 	}
2382 }
2383 
2384 static int sh_eth_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
2385 {
2386 	struct sh_eth_private *mdp = netdev_priv(ndev);
2387 
2388 	if (!mdp->cd->magic || wol->wolopts & ~WAKE_MAGIC)
2389 		return -EOPNOTSUPP;
2390 
2391 	mdp->wol_enabled = !!(wol->wolopts & WAKE_MAGIC);
2392 
2393 	device_set_wakeup_enable(&mdp->pdev->dev, mdp->wol_enabled);
2394 
2395 	return 0;
2396 }
2397 
2398 static const struct ethtool_ops sh_eth_ethtool_ops = {
2399 	.get_regs_len	= sh_eth_get_regs_len,
2400 	.get_regs	= sh_eth_get_regs,
2401 	.nway_reset	= phy_ethtool_nway_reset,
2402 	.get_msglevel	= sh_eth_get_msglevel,
2403 	.set_msglevel	= sh_eth_set_msglevel,
2404 	.get_link	= ethtool_op_get_link,
2405 	.get_strings	= sh_eth_get_strings,
2406 	.get_ethtool_stats  = sh_eth_get_ethtool_stats,
2407 	.get_sset_count     = sh_eth_get_sset_count,
2408 	.get_ringparam	= sh_eth_get_ringparam,
2409 	.set_ringparam	= sh_eth_set_ringparam,
2410 	.get_link_ksettings = phy_ethtool_get_link_ksettings,
2411 	.set_link_ksettings = phy_ethtool_set_link_ksettings,
2412 	.get_wol	= sh_eth_get_wol,
2413 	.set_wol	= sh_eth_set_wol,
2414 };
2415 
2416 /* network device open function */
2417 static int sh_eth_open(struct net_device *ndev)
2418 {
2419 	struct sh_eth_private *mdp = netdev_priv(ndev);
2420 	int ret;
2421 
2422 	pm_runtime_get_sync(&mdp->pdev->dev);
2423 
2424 	napi_enable(&mdp->napi);
2425 
2426 	ret = request_irq(ndev->irq, sh_eth_interrupt,
2427 			  mdp->cd->irq_flags, ndev->name, ndev);
2428 	if (ret) {
2429 		netdev_err(ndev, "Can not assign IRQ number\n");
2430 		goto out_napi_off;
2431 	}
2432 
2433 	/* Descriptor set */
2434 	ret = sh_eth_ring_init(ndev);
2435 	if (ret)
2436 		goto out_free_irq;
2437 
2438 	/* device init */
2439 	ret = sh_eth_dev_init(ndev);
2440 	if (ret)
2441 		goto out_free_irq;
2442 
2443 	/* PHY control start*/
2444 	ret = sh_eth_phy_start(ndev);
2445 	if (ret)
2446 		goto out_free_irq;
2447 
2448 	netif_start_queue(ndev);
2449 
2450 	mdp->is_opened = 1;
2451 
2452 	return ret;
2453 
2454 out_free_irq:
2455 	free_irq(ndev->irq, ndev);
2456 out_napi_off:
2457 	napi_disable(&mdp->napi);
2458 	pm_runtime_put_sync(&mdp->pdev->dev);
2459 	return ret;
2460 }
2461 
2462 /* Timeout function */
2463 static void sh_eth_tx_timeout(struct net_device *ndev, unsigned int txqueue)
2464 {
2465 	struct sh_eth_private *mdp = netdev_priv(ndev);
2466 	struct sh_eth_rxdesc *rxdesc;
2467 	int i;
2468 
2469 	netif_stop_queue(ndev);
2470 
2471 	netif_err(mdp, timer, ndev,
2472 		  "transmit timed out, status %8.8x, resetting...\n",
2473 		  sh_eth_read(ndev, EESR));
2474 
2475 	/* tx_errors count up */
2476 	ndev->stats.tx_errors++;
2477 
2478 	/* Free all the skbuffs in the Rx queue. */
2479 	for (i = 0; i < mdp->num_rx_ring; i++) {
2480 		rxdesc = &mdp->rx_ring[i];
2481 		rxdesc->status = cpu_to_le32(0);
2482 		rxdesc->addr = cpu_to_le32(0xBADF00D0);
2483 		dev_kfree_skb(mdp->rx_skbuff[i]);
2484 		mdp->rx_skbuff[i] = NULL;
2485 	}
2486 	for (i = 0; i < mdp->num_tx_ring; i++) {
2487 		dev_kfree_skb(mdp->tx_skbuff[i]);
2488 		mdp->tx_skbuff[i] = NULL;
2489 	}
2490 
2491 	/* device init */
2492 	sh_eth_dev_init(ndev);
2493 
2494 	netif_start_queue(ndev);
2495 }
2496 
2497 /* Packet transmit function */
2498 static netdev_tx_t sh_eth_start_xmit(struct sk_buff *skb,
2499 				     struct net_device *ndev)
2500 {
2501 	struct sh_eth_private *mdp = netdev_priv(ndev);
2502 	struct sh_eth_txdesc *txdesc;
2503 	dma_addr_t dma_addr;
2504 	u32 entry;
2505 	unsigned long flags;
2506 
2507 	spin_lock_irqsave(&mdp->lock, flags);
2508 	if ((mdp->cur_tx - mdp->dirty_tx) >= (mdp->num_tx_ring - 4)) {
2509 		if (!sh_eth_tx_free(ndev, true)) {
2510 			netif_warn(mdp, tx_queued, ndev, "TxFD exhausted.\n");
2511 			netif_stop_queue(ndev);
2512 			spin_unlock_irqrestore(&mdp->lock, flags);
2513 			return NETDEV_TX_BUSY;
2514 		}
2515 	}
2516 	spin_unlock_irqrestore(&mdp->lock, flags);
2517 
2518 	if (skb_put_padto(skb, ETH_ZLEN))
2519 		return NETDEV_TX_OK;
2520 
2521 	entry = mdp->cur_tx % mdp->num_tx_ring;
2522 	mdp->tx_skbuff[entry] = skb;
2523 	txdesc = &mdp->tx_ring[entry];
2524 	/* soft swap. */
2525 	if (!mdp->cd->hw_swap)
2526 		sh_eth_soft_swap(PTR_ALIGN(skb->data, 4), skb->len + 2);
2527 	dma_addr = dma_map_single(&mdp->pdev->dev, skb->data, skb->len,
2528 				  DMA_TO_DEVICE);
2529 	if (dma_mapping_error(&mdp->pdev->dev, dma_addr)) {
2530 		kfree_skb(skb);
2531 		return NETDEV_TX_OK;
2532 	}
2533 	txdesc->addr = cpu_to_le32(dma_addr);
2534 	txdesc->len  = cpu_to_le32(skb->len << 16);
2535 
2536 	dma_wmb(); /* TACT bit must be set after all the above writes */
2537 	if (entry >= mdp->num_tx_ring - 1)
2538 		txdesc->status |= cpu_to_le32(TD_TACT | TD_TDLE);
2539 	else
2540 		txdesc->status |= cpu_to_le32(TD_TACT);
2541 
2542 	wmb(); /* cur_tx must be incremented after TACT bit was set */
2543 	mdp->cur_tx++;
2544 
2545 	if (!(sh_eth_read(ndev, EDTRR) & mdp->cd->edtrr_trns))
2546 		sh_eth_write(ndev, mdp->cd->edtrr_trns, EDTRR);
2547 
2548 	return NETDEV_TX_OK;
2549 }
2550 
2551 /* The statistics registers have write-clear behaviour, which means we
2552  * will lose any increment between the read and write.  We mitigate
2553  * this by only clearing when we read a non-zero value, so we will
2554  * never falsely report a total of zero.
2555  */
2556 static void
2557 sh_eth_update_stat(struct net_device *ndev, unsigned long *stat, int reg)
2558 {
2559 	u32 delta = sh_eth_read(ndev, reg);
2560 
2561 	if (delta) {
2562 		*stat += delta;
2563 		sh_eth_write(ndev, 0, reg);
2564 	}
2565 }
2566 
2567 static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev)
2568 {
2569 	struct sh_eth_private *mdp = netdev_priv(ndev);
2570 
2571 	if (mdp->cd->no_tx_cntrs)
2572 		return &ndev->stats;
2573 
2574 	if (!mdp->is_opened)
2575 		return &ndev->stats;
2576 
2577 	sh_eth_update_stat(ndev, &ndev->stats.tx_dropped, TROCR);
2578 	sh_eth_update_stat(ndev, &ndev->stats.collisions, CDCR);
2579 	sh_eth_update_stat(ndev, &ndev->stats.tx_carrier_errors, LCCR);
2580 
2581 	if (mdp->cd->cexcr) {
2582 		sh_eth_update_stat(ndev, &ndev->stats.tx_carrier_errors,
2583 				   CERCR);
2584 		sh_eth_update_stat(ndev, &ndev->stats.tx_carrier_errors,
2585 				   CEECR);
2586 	} else {
2587 		sh_eth_update_stat(ndev, &ndev->stats.tx_carrier_errors,
2588 				   CNDCR);
2589 	}
2590 
2591 	return &ndev->stats;
2592 }
2593 
2594 /* device close function */
2595 static int sh_eth_close(struct net_device *ndev)
2596 {
2597 	struct sh_eth_private *mdp = netdev_priv(ndev);
2598 
2599 	netif_stop_queue(ndev);
2600 
2601 	/* Serialise with the interrupt handler and NAPI, then disable
2602 	 * interrupts.  We have to clear the irq_enabled flag first to
2603 	 * ensure that interrupts won't be re-enabled.
2604 	 */
2605 	mdp->irq_enabled = false;
2606 	synchronize_irq(ndev->irq);
2607 	napi_disable(&mdp->napi);
2608 	sh_eth_write(ndev, 0x0000, EESIPR);
2609 
2610 	sh_eth_dev_exit(ndev);
2611 
2612 	/* PHY Disconnect */
2613 	if (ndev->phydev) {
2614 		phy_stop(ndev->phydev);
2615 		phy_disconnect(ndev->phydev);
2616 	}
2617 
2618 	free_irq(ndev->irq, ndev);
2619 
2620 	/* Free all the skbuffs in the Rx queue and the DMA buffer. */
2621 	sh_eth_ring_free(ndev);
2622 
2623 	mdp->is_opened = 0;
2624 
2625 	pm_runtime_put(&mdp->pdev->dev);
2626 
2627 	return 0;
2628 }
2629 
2630 static int sh_eth_change_mtu(struct net_device *ndev, int new_mtu)
2631 {
2632 	if (netif_running(ndev))
2633 		return -EBUSY;
2634 
2635 	ndev->mtu = new_mtu;
2636 	netdev_update_features(ndev);
2637 
2638 	return 0;
2639 }
2640 
2641 /* For TSU_POSTn. Please refer to the manual about this (strange) bitfields */
2642 static u32 sh_eth_tsu_get_post_mask(int entry)
2643 {
2644 	return 0x0f << (28 - ((entry % 8) * 4));
2645 }
2646 
2647 static u32 sh_eth_tsu_get_post_bit(struct sh_eth_private *mdp, int entry)
2648 {
2649 	return (0x08 >> (mdp->port << 1)) << (28 - ((entry % 8) * 4));
2650 }
2651 
2652 static void sh_eth_tsu_enable_cam_entry_post(struct net_device *ndev,
2653 					     int entry)
2654 {
2655 	struct sh_eth_private *mdp = netdev_priv(ndev);
2656 	int reg = TSU_POST1 + entry / 8;
2657 	u32 tmp;
2658 
2659 	tmp = sh_eth_tsu_read(mdp, reg);
2660 	sh_eth_tsu_write(mdp, tmp | sh_eth_tsu_get_post_bit(mdp, entry), reg);
2661 }
2662 
2663 static bool sh_eth_tsu_disable_cam_entry_post(struct net_device *ndev,
2664 					      int entry)
2665 {
2666 	struct sh_eth_private *mdp = netdev_priv(ndev);
2667 	int reg = TSU_POST1 + entry / 8;
2668 	u32 post_mask, ref_mask, tmp;
2669 
2670 	post_mask = sh_eth_tsu_get_post_mask(entry);
2671 	ref_mask = sh_eth_tsu_get_post_bit(mdp, entry) & ~post_mask;
2672 
2673 	tmp = sh_eth_tsu_read(mdp, reg);
2674 	sh_eth_tsu_write(mdp, tmp & ~post_mask, reg);
2675 
2676 	/* If other port enables, the function returns "true" */
2677 	return tmp & ref_mask;
2678 }
2679 
2680 static int sh_eth_tsu_busy(struct net_device *ndev)
2681 {
2682 	int timeout = SH_ETH_TSU_TIMEOUT_MS * 100;
2683 	struct sh_eth_private *mdp = netdev_priv(ndev);
2684 
2685 	while ((sh_eth_tsu_read(mdp, TSU_ADSBSY) & TSU_ADSBSY_0)) {
2686 		udelay(10);
2687 		timeout--;
2688 		if (timeout <= 0) {
2689 			netdev_err(ndev, "%s: timeout\n", __func__);
2690 			return -ETIMEDOUT;
2691 		}
2692 	}
2693 
2694 	return 0;
2695 }
2696 
2697 static int sh_eth_tsu_write_entry(struct net_device *ndev, u16 offset,
2698 				  const u8 *addr)
2699 {
2700 	struct sh_eth_private *mdp = netdev_priv(ndev);
2701 	u32 val;
2702 
2703 	val = addr[0] << 24 | addr[1] << 16 | addr[2] << 8 | addr[3];
2704 	iowrite32(val, mdp->tsu_addr + offset);
2705 	if (sh_eth_tsu_busy(ndev) < 0)
2706 		return -EBUSY;
2707 
2708 	val = addr[4] << 8 | addr[5];
2709 	iowrite32(val, mdp->tsu_addr + offset + 4);
2710 	if (sh_eth_tsu_busy(ndev) < 0)
2711 		return -EBUSY;
2712 
2713 	return 0;
2714 }
2715 
2716 static void sh_eth_tsu_read_entry(struct net_device *ndev, u16 offset, u8 *addr)
2717 {
2718 	struct sh_eth_private *mdp = netdev_priv(ndev);
2719 	u32 val;
2720 
2721 	val = ioread32(mdp->tsu_addr + offset);
2722 	addr[0] = (val >> 24) & 0xff;
2723 	addr[1] = (val >> 16) & 0xff;
2724 	addr[2] = (val >> 8) & 0xff;
2725 	addr[3] = val & 0xff;
2726 	val = ioread32(mdp->tsu_addr + offset + 4);
2727 	addr[4] = (val >> 8) & 0xff;
2728 	addr[5] = val & 0xff;
2729 }
2730 
2731 
2732 static int sh_eth_tsu_find_entry(struct net_device *ndev, const u8 *addr)
2733 {
2734 	struct sh_eth_private *mdp = netdev_priv(ndev);
2735 	u16 reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
2736 	int i;
2737 	u8 c_addr[ETH_ALEN];
2738 
2739 	for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++, reg_offset += 8) {
2740 		sh_eth_tsu_read_entry(ndev, reg_offset, c_addr);
2741 		if (ether_addr_equal(addr, c_addr))
2742 			return i;
2743 	}
2744 
2745 	return -ENOENT;
2746 }
2747 
2748 static int sh_eth_tsu_find_empty(struct net_device *ndev)
2749 {
2750 	u8 blank[ETH_ALEN];
2751 	int entry;
2752 
2753 	memset(blank, 0, sizeof(blank));
2754 	entry = sh_eth_tsu_find_entry(ndev, blank);
2755 	return (entry < 0) ? -ENOMEM : entry;
2756 }
2757 
2758 static int sh_eth_tsu_disable_cam_entry_table(struct net_device *ndev,
2759 					      int entry)
2760 {
2761 	struct sh_eth_private *mdp = netdev_priv(ndev);
2762 	u16 reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
2763 	int ret;
2764 	u8 blank[ETH_ALEN];
2765 
2766 	sh_eth_tsu_write(mdp, sh_eth_tsu_read(mdp, TSU_TEN) &
2767 			 ~(1 << (31 - entry)), TSU_TEN);
2768 
2769 	memset(blank, 0, sizeof(blank));
2770 	ret = sh_eth_tsu_write_entry(ndev, reg_offset + entry * 8, blank);
2771 	if (ret < 0)
2772 		return ret;
2773 	return 0;
2774 }
2775 
2776 static int sh_eth_tsu_add_entry(struct net_device *ndev, const u8 *addr)
2777 {
2778 	struct sh_eth_private *mdp = netdev_priv(ndev);
2779 	u16 reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
2780 	int i, ret;
2781 
2782 	if (!mdp->cd->tsu)
2783 		return 0;
2784 
2785 	i = sh_eth_tsu_find_entry(ndev, addr);
2786 	if (i < 0) {
2787 		/* No entry found, create one */
2788 		i = sh_eth_tsu_find_empty(ndev);
2789 		if (i < 0)
2790 			return -ENOMEM;
2791 		ret = sh_eth_tsu_write_entry(ndev, reg_offset + i * 8, addr);
2792 		if (ret < 0)
2793 			return ret;
2794 
2795 		/* Enable the entry */
2796 		sh_eth_tsu_write(mdp, sh_eth_tsu_read(mdp, TSU_TEN) |
2797 				 (1 << (31 - i)), TSU_TEN);
2798 	}
2799 
2800 	/* Entry found or created, enable POST */
2801 	sh_eth_tsu_enable_cam_entry_post(ndev, i);
2802 
2803 	return 0;
2804 }
2805 
2806 static int sh_eth_tsu_del_entry(struct net_device *ndev, const u8 *addr)
2807 {
2808 	struct sh_eth_private *mdp = netdev_priv(ndev);
2809 	int i, ret;
2810 
2811 	if (!mdp->cd->tsu)
2812 		return 0;
2813 
2814 	i = sh_eth_tsu_find_entry(ndev, addr);
2815 	if (i) {
2816 		/* Entry found */
2817 		if (sh_eth_tsu_disable_cam_entry_post(ndev, i))
2818 			goto done;
2819 
2820 		/* Disable the entry if both ports was disabled */
2821 		ret = sh_eth_tsu_disable_cam_entry_table(ndev, i);
2822 		if (ret < 0)
2823 			return ret;
2824 	}
2825 done:
2826 	return 0;
2827 }
2828 
2829 static int sh_eth_tsu_purge_all(struct net_device *ndev)
2830 {
2831 	struct sh_eth_private *mdp = netdev_priv(ndev);
2832 	int i, ret;
2833 
2834 	if (!mdp->cd->tsu)
2835 		return 0;
2836 
2837 	for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++) {
2838 		if (sh_eth_tsu_disable_cam_entry_post(ndev, i))
2839 			continue;
2840 
2841 		/* Disable the entry if both ports was disabled */
2842 		ret = sh_eth_tsu_disable_cam_entry_table(ndev, i);
2843 		if (ret < 0)
2844 			return ret;
2845 	}
2846 
2847 	return 0;
2848 }
2849 
2850 static void sh_eth_tsu_purge_mcast(struct net_device *ndev)
2851 {
2852 	struct sh_eth_private *mdp = netdev_priv(ndev);
2853 	u16 reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
2854 	u8 addr[ETH_ALEN];
2855 	int i;
2856 
2857 	if (!mdp->cd->tsu)
2858 		return;
2859 
2860 	for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++, reg_offset += 8) {
2861 		sh_eth_tsu_read_entry(ndev, reg_offset, addr);
2862 		if (is_multicast_ether_addr(addr))
2863 			sh_eth_tsu_del_entry(ndev, addr);
2864 	}
2865 }
2866 
2867 /* Update promiscuous flag and multicast filter */
2868 static void sh_eth_set_rx_mode(struct net_device *ndev)
2869 {
2870 	struct sh_eth_private *mdp = netdev_priv(ndev);
2871 	u32 ecmr_bits;
2872 	int mcast_all = 0;
2873 	unsigned long flags;
2874 
2875 	spin_lock_irqsave(&mdp->lock, flags);
2876 	/* Initial condition is MCT = 1, PRM = 0.
2877 	 * Depending on ndev->flags, set PRM or clear MCT
2878 	 */
2879 	ecmr_bits = sh_eth_read(ndev, ECMR) & ~ECMR_PRM;
2880 	if (mdp->cd->tsu)
2881 		ecmr_bits |= ECMR_MCT;
2882 
2883 	if (!(ndev->flags & IFF_MULTICAST)) {
2884 		sh_eth_tsu_purge_mcast(ndev);
2885 		mcast_all = 1;
2886 	}
2887 	if (ndev->flags & IFF_ALLMULTI) {
2888 		sh_eth_tsu_purge_mcast(ndev);
2889 		ecmr_bits &= ~ECMR_MCT;
2890 		mcast_all = 1;
2891 	}
2892 
2893 	if (ndev->flags & IFF_PROMISC) {
2894 		sh_eth_tsu_purge_all(ndev);
2895 		ecmr_bits = (ecmr_bits & ~ECMR_MCT) | ECMR_PRM;
2896 	} else if (mdp->cd->tsu) {
2897 		struct netdev_hw_addr *ha;
2898 		netdev_for_each_mc_addr(ha, ndev) {
2899 			if (mcast_all && is_multicast_ether_addr(ha->addr))
2900 				continue;
2901 
2902 			if (sh_eth_tsu_add_entry(ndev, ha->addr) < 0) {
2903 				if (!mcast_all) {
2904 					sh_eth_tsu_purge_mcast(ndev);
2905 					ecmr_bits &= ~ECMR_MCT;
2906 					mcast_all = 1;
2907 				}
2908 			}
2909 		}
2910 	}
2911 
2912 	/* update the ethernet mode */
2913 	sh_eth_write(ndev, ecmr_bits, ECMR);
2914 
2915 	spin_unlock_irqrestore(&mdp->lock, flags);
2916 }
2917 
2918 static void sh_eth_set_rx_csum(struct net_device *ndev, bool enable)
2919 {
2920 	struct sh_eth_private *mdp = netdev_priv(ndev);
2921 	unsigned long flags;
2922 
2923 	spin_lock_irqsave(&mdp->lock, flags);
2924 
2925 	/* Disable TX and RX */
2926 	sh_eth_rcv_snd_disable(ndev);
2927 
2928 	/* Modify RX Checksum setting */
2929 	sh_eth_modify(ndev, ECMR, ECMR_RCSC, enable ? ECMR_RCSC : 0);
2930 
2931 	/* Enable TX and RX */
2932 	sh_eth_rcv_snd_enable(ndev);
2933 
2934 	spin_unlock_irqrestore(&mdp->lock, flags);
2935 }
2936 
2937 static int sh_eth_set_features(struct net_device *ndev,
2938 			       netdev_features_t features)
2939 {
2940 	netdev_features_t changed = ndev->features ^ features;
2941 	struct sh_eth_private *mdp = netdev_priv(ndev);
2942 
2943 	if (changed & NETIF_F_RXCSUM && mdp->cd->rx_csum)
2944 		sh_eth_set_rx_csum(ndev, features & NETIF_F_RXCSUM);
2945 
2946 	ndev->features = features;
2947 
2948 	return 0;
2949 }
2950 
2951 static int sh_eth_get_vtag_index(struct sh_eth_private *mdp)
2952 {
2953 	if (!mdp->port)
2954 		return TSU_VTAG0;
2955 	else
2956 		return TSU_VTAG1;
2957 }
2958 
2959 static int sh_eth_vlan_rx_add_vid(struct net_device *ndev,
2960 				  __be16 proto, u16 vid)
2961 {
2962 	struct sh_eth_private *mdp = netdev_priv(ndev);
2963 	int vtag_reg_index = sh_eth_get_vtag_index(mdp);
2964 
2965 	if (unlikely(!mdp->cd->tsu))
2966 		return -EPERM;
2967 
2968 	/* No filtering if vid = 0 */
2969 	if (!vid)
2970 		return 0;
2971 
2972 	mdp->vlan_num_ids++;
2973 
2974 	/* The controller has one VLAN tag HW filter. So, if the filter is
2975 	 * already enabled, the driver disables it and the filte
2976 	 */
2977 	if (mdp->vlan_num_ids > 1) {
2978 		/* disable VLAN filter */
2979 		sh_eth_tsu_write(mdp, 0, vtag_reg_index);
2980 		return 0;
2981 	}
2982 
2983 	sh_eth_tsu_write(mdp, TSU_VTAG_ENABLE | (vid & TSU_VTAG_VID_MASK),
2984 			 vtag_reg_index);
2985 
2986 	return 0;
2987 }
2988 
2989 static int sh_eth_vlan_rx_kill_vid(struct net_device *ndev,
2990 				   __be16 proto, u16 vid)
2991 {
2992 	struct sh_eth_private *mdp = netdev_priv(ndev);
2993 	int vtag_reg_index = sh_eth_get_vtag_index(mdp);
2994 
2995 	if (unlikely(!mdp->cd->tsu))
2996 		return -EPERM;
2997 
2998 	/* No filtering if vid = 0 */
2999 	if (!vid)
3000 		return 0;
3001 
3002 	mdp->vlan_num_ids--;
3003 	sh_eth_tsu_write(mdp, 0, vtag_reg_index);
3004 
3005 	return 0;
3006 }
3007 
3008 /* SuperH's TSU register init function */
3009 static void sh_eth_tsu_init(struct sh_eth_private *mdp)
3010 {
3011 	if (!mdp->cd->dual_port) {
3012 		sh_eth_tsu_write(mdp, 0, TSU_TEN); /* Disable all CAM entry */
3013 		sh_eth_tsu_write(mdp, TSU_FWSLC_POSTENU | TSU_FWSLC_POSTENL,
3014 				 TSU_FWSLC);	/* Enable POST registers */
3015 		return;
3016 	}
3017 
3018 	sh_eth_tsu_write(mdp, 0, TSU_FWEN0);	/* Disable forward(0->1) */
3019 	sh_eth_tsu_write(mdp, 0, TSU_FWEN1);	/* Disable forward(1->0) */
3020 	sh_eth_tsu_write(mdp, 0, TSU_FCM);	/* forward fifo 3k-3k */
3021 	sh_eth_tsu_write(mdp, 0xc, TSU_BSYSL0);
3022 	sh_eth_tsu_write(mdp, 0xc, TSU_BSYSL1);
3023 	sh_eth_tsu_write(mdp, 0, TSU_PRISL0);
3024 	sh_eth_tsu_write(mdp, 0, TSU_PRISL1);
3025 	sh_eth_tsu_write(mdp, 0, TSU_FWSL0);
3026 	sh_eth_tsu_write(mdp, 0, TSU_FWSL1);
3027 	sh_eth_tsu_write(mdp, TSU_FWSLC_POSTENU | TSU_FWSLC_POSTENL, TSU_FWSLC);
3028 	sh_eth_tsu_write(mdp, 0, TSU_QTAGM0);	/* Disable QTAG(0->1) */
3029 	sh_eth_tsu_write(mdp, 0, TSU_QTAGM1);	/* Disable QTAG(1->0) */
3030 	sh_eth_tsu_write(mdp, 0, TSU_FWSR);	/* all interrupt status clear */
3031 	sh_eth_tsu_write(mdp, 0, TSU_FWINMK);	/* Disable all interrupt */
3032 	sh_eth_tsu_write(mdp, 0, TSU_TEN);	/* Disable all CAM entry */
3033 	sh_eth_tsu_write(mdp, 0, TSU_POST1);	/* Disable CAM entry [ 0- 7] */
3034 	sh_eth_tsu_write(mdp, 0, TSU_POST2);	/* Disable CAM entry [ 8-15] */
3035 	sh_eth_tsu_write(mdp, 0, TSU_POST3);	/* Disable CAM entry [16-23] */
3036 	sh_eth_tsu_write(mdp, 0, TSU_POST4);	/* Disable CAM entry [24-31] */
3037 }
3038 
3039 /* MDIO bus release function */
3040 static int sh_mdio_release(struct sh_eth_private *mdp)
3041 {
3042 	/* unregister mdio bus */
3043 	mdiobus_unregister(mdp->mii_bus);
3044 
3045 	/* free bitbang info */
3046 	free_mdio_bitbang(mdp->mii_bus);
3047 
3048 	return 0;
3049 }
3050 
3051 static int sh_mdiobb_read(struct mii_bus *bus, int phy, int reg)
3052 {
3053 	int res;
3054 
3055 	pm_runtime_get_sync(bus->parent);
3056 	res = mdiobb_read(bus, phy, reg);
3057 	pm_runtime_put(bus->parent);
3058 
3059 	return res;
3060 }
3061 
3062 static int sh_mdiobb_write(struct mii_bus *bus, int phy, int reg, u16 val)
3063 {
3064 	int res;
3065 
3066 	pm_runtime_get_sync(bus->parent);
3067 	res = mdiobb_write(bus, phy, reg, val);
3068 	pm_runtime_put(bus->parent);
3069 
3070 	return res;
3071 }
3072 
3073 /* MDIO bus init function */
3074 static int sh_mdio_init(struct sh_eth_private *mdp,
3075 			struct sh_eth_plat_data *pd)
3076 {
3077 	int ret;
3078 	struct bb_info *bitbang;
3079 	struct platform_device *pdev = mdp->pdev;
3080 	struct device *dev = &mdp->pdev->dev;
3081 
3082 	/* create bit control struct for PHY */
3083 	bitbang = devm_kzalloc(dev, sizeof(struct bb_info), GFP_KERNEL);
3084 	if (!bitbang)
3085 		return -ENOMEM;
3086 
3087 	/* bitbang init */
3088 	bitbang->addr = mdp->addr + mdp->reg_offset[PIR];
3089 	bitbang->set_gate = pd->set_mdio_gate;
3090 	bitbang->ctrl.ops = &bb_ops;
3091 
3092 	/* MII controller setting */
3093 	mdp->mii_bus = alloc_mdio_bitbang(&bitbang->ctrl);
3094 	if (!mdp->mii_bus)
3095 		return -ENOMEM;
3096 
3097 	/* Wrap accessors with Runtime PM-aware ops */
3098 	mdp->mii_bus->read = sh_mdiobb_read;
3099 	mdp->mii_bus->write = sh_mdiobb_write;
3100 
3101 	/* Hook up MII support for ethtool */
3102 	mdp->mii_bus->name = "sh_mii";
3103 	mdp->mii_bus->parent = dev;
3104 	snprintf(mdp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
3105 		 pdev->name, pdev->id);
3106 
3107 	/* register MDIO bus */
3108 	if (pd->phy_irq > 0)
3109 		mdp->mii_bus->irq[pd->phy] = pd->phy_irq;
3110 
3111 	ret = of_mdiobus_register(mdp->mii_bus, dev->of_node);
3112 	if (ret)
3113 		goto out_free_bus;
3114 
3115 	return 0;
3116 
3117 out_free_bus:
3118 	free_mdio_bitbang(mdp->mii_bus);
3119 	return ret;
3120 }
3121 
3122 static const u16 *sh_eth_get_register_offset(int register_type)
3123 {
3124 	const u16 *reg_offset = NULL;
3125 
3126 	switch (register_type) {
3127 	case SH_ETH_REG_GIGABIT:
3128 		reg_offset = sh_eth_offset_gigabit;
3129 		break;
3130 	case SH_ETH_REG_FAST_RCAR:
3131 		reg_offset = sh_eth_offset_fast_rcar;
3132 		break;
3133 	case SH_ETH_REG_FAST_SH4:
3134 		reg_offset = sh_eth_offset_fast_sh4;
3135 		break;
3136 	case SH_ETH_REG_FAST_SH3_SH2:
3137 		reg_offset = sh_eth_offset_fast_sh3_sh2;
3138 		break;
3139 	}
3140 
3141 	return reg_offset;
3142 }
3143 
3144 static const struct net_device_ops sh_eth_netdev_ops = {
3145 	.ndo_open		= sh_eth_open,
3146 	.ndo_stop		= sh_eth_close,
3147 	.ndo_start_xmit		= sh_eth_start_xmit,
3148 	.ndo_get_stats		= sh_eth_get_stats,
3149 	.ndo_set_rx_mode	= sh_eth_set_rx_mode,
3150 	.ndo_tx_timeout		= sh_eth_tx_timeout,
3151 	.ndo_eth_ioctl		= phy_do_ioctl_running,
3152 	.ndo_change_mtu		= sh_eth_change_mtu,
3153 	.ndo_validate_addr	= eth_validate_addr,
3154 	.ndo_set_mac_address	= eth_mac_addr,
3155 	.ndo_set_features	= sh_eth_set_features,
3156 };
3157 
3158 static const struct net_device_ops sh_eth_netdev_ops_tsu = {
3159 	.ndo_open		= sh_eth_open,
3160 	.ndo_stop		= sh_eth_close,
3161 	.ndo_start_xmit		= sh_eth_start_xmit,
3162 	.ndo_get_stats		= sh_eth_get_stats,
3163 	.ndo_set_rx_mode	= sh_eth_set_rx_mode,
3164 	.ndo_vlan_rx_add_vid	= sh_eth_vlan_rx_add_vid,
3165 	.ndo_vlan_rx_kill_vid	= sh_eth_vlan_rx_kill_vid,
3166 	.ndo_tx_timeout		= sh_eth_tx_timeout,
3167 	.ndo_eth_ioctl		= phy_do_ioctl_running,
3168 	.ndo_change_mtu		= sh_eth_change_mtu,
3169 	.ndo_validate_addr	= eth_validate_addr,
3170 	.ndo_set_mac_address	= eth_mac_addr,
3171 	.ndo_set_features	= sh_eth_set_features,
3172 };
3173 
3174 #ifdef CONFIG_OF
3175 static struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev)
3176 {
3177 	struct device_node *np = dev->of_node;
3178 	struct sh_eth_plat_data *pdata;
3179 	phy_interface_t interface;
3180 	int ret;
3181 
3182 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
3183 	if (!pdata)
3184 		return NULL;
3185 
3186 	ret = of_get_phy_mode(np, &interface);
3187 	if (ret)
3188 		return NULL;
3189 	pdata->phy_interface = interface;
3190 
3191 	of_get_mac_address(np, pdata->mac_addr);
3192 
3193 	pdata->no_ether_link =
3194 		of_property_read_bool(np, "renesas,no-ether-link");
3195 	pdata->ether_link_active_low =
3196 		of_property_read_bool(np, "renesas,ether-link-active-low");
3197 
3198 	return pdata;
3199 }
3200 
3201 static const struct of_device_id sh_eth_match_table[] = {
3202 	{ .compatible = "renesas,gether-r8a7740", .data = &r8a7740_data },
3203 	{ .compatible = "renesas,ether-r8a7743", .data = &rcar_gen2_data },
3204 	{ .compatible = "renesas,ether-r8a7745", .data = &rcar_gen2_data },
3205 	{ .compatible = "renesas,ether-r8a7778", .data = &rcar_gen1_data },
3206 	{ .compatible = "renesas,ether-r8a7779", .data = &rcar_gen1_data },
3207 	{ .compatible = "renesas,ether-r8a7790", .data = &rcar_gen2_data },
3208 	{ .compatible = "renesas,ether-r8a7791", .data = &rcar_gen2_data },
3209 	{ .compatible = "renesas,ether-r8a7793", .data = &rcar_gen2_data },
3210 	{ .compatible = "renesas,ether-r8a7794", .data = &rcar_gen2_data },
3211 	{ .compatible = "renesas,gether-r8a77980", .data = &r8a77980_data },
3212 	{ .compatible = "renesas,ether-r7s72100", .data = &r7s72100_data },
3213 	{ .compatible = "renesas,ether-r7s9210", .data = &r7s9210_data },
3214 	{ .compatible = "renesas,rcar-gen1-ether", .data = &rcar_gen1_data },
3215 	{ .compatible = "renesas,rcar-gen2-ether", .data = &rcar_gen2_data },
3216 	{ }
3217 };
3218 MODULE_DEVICE_TABLE(of, sh_eth_match_table);
3219 #else
3220 static inline struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev)
3221 {
3222 	return NULL;
3223 }
3224 #endif
3225 
3226 static int sh_eth_drv_probe(struct platform_device *pdev)
3227 {
3228 	struct resource *res;
3229 	struct sh_eth_plat_data *pd = dev_get_platdata(&pdev->dev);
3230 	const struct platform_device_id *id = platform_get_device_id(pdev);
3231 	struct sh_eth_private *mdp;
3232 	struct net_device *ndev;
3233 	int ret;
3234 
3235 	ndev = alloc_etherdev(sizeof(struct sh_eth_private));
3236 	if (!ndev)
3237 		return -ENOMEM;
3238 
3239 	pm_runtime_enable(&pdev->dev);
3240 	pm_runtime_get_sync(&pdev->dev);
3241 
3242 	ret = platform_get_irq(pdev, 0);
3243 	if (ret < 0)
3244 		goto out_release;
3245 	ndev->irq = ret;
3246 
3247 	SET_NETDEV_DEV(ndev, &pdev->dev);
3248 
3249 	mdp = netdev_priv(ndev);
3250 	mdp->num_tx_ring = TX_RING_SIZE;
3251 	mdp->num_rx_ring = RX_RING_SIZE;
3252 	mdp->addr = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
3253 	if (IS_ERR(mdp->addr)) {
3254 		ret = PTR_ERR(mdp->addr);
3255 		goto out_release;
3256 	}
3257 
3258 	ndev->base_addr = res->start;
3259 
3260 	spin_lock_init(&mdp->lock);
3261 	mdp->pdev = pdev;
3262 
3263 	if (pdev->dev.of_node)
3264 		pd = sh_eth_parse_dt(&pdev->dev);
3265 	if (!pd) {
3266 		dev_err(&pdev->dev, "no platform data\n");
3267 		ret = -EINVAL;
3268 		goto out_release;
3269 	}
3270 
3271 	/* get PHY ID */
3272 	mdp->phy_id = pd->phy;
3273 	mdp->phy_interface = pd->phy_interface;
3274 	mdp->no_ether_link = pd->no_ether_link;
3275 	mdp->ether_link_active_low = pd->ether_link_active_low;
3276 
3277 	/* set cpu data */
3278 	if (id)
3279 		mdp->cd = (struct sh_eth_cpu_data *)id->driver_data;
3280 	else
3281 		mdp->cd = (struct sh_eth_cpu_data *)of_device_get_match_data(&pdev->dev);
3282 
3283 	mdp->reg_offset = sh_eth_get_register_offset(mdp->cd->register_type);
3284 	if (!mdp->reg_offset) {
3285 		dev_err(&pdev->dev, "Unknown register type (%d)\n",
3286 			mdp->cd->register_type);
3287 		ret = -EINVAL;
3288 		goto out_release;
3289 	}
3290 	sh_eth_set_default_cpu_data(mdp->cd);
3291 
3292 	/* User's manual states max MTU should be 2048 but due to the
3293 	 * alignment calculations in sh_eth_ring_init() the practical
3294 	 * MTU is a bit less. Maybe this can be optimized some more.
3295 	 */
3296 	ndev->max_mtu = 2000 - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
3297 	ndev->min_mtu = ETH_MIN_MTU;
3298 
3299 	if (mdp->cd->rx_csum) {
3300 		ndev->features = NETIF_F_RXCSUM;
3301 		ndev->hw_features = NETIF_F_RXCSUM;
3302 	}
3303 
3304 	/* set function */
3305 	if (mdp->cd->tsu)
3306 		ndev->netdev_ops = &sh_eth_netdev_ops_tsu;
3307 	else
3308 		ndev->netdev_ops = &sh_eth_netdev_ops;
3309 	ndev->ethtool_ops = &sh_eth_ethtool_ops;
3310 	ndev->watchdog_timeo = TX_TIMEOUT;
3311 
3312 	/* debug message level */
3313 	mdp->msg_enable = SH_ETH_DEF_MSG_ENABLE;
3314 
3315 	/* read and set MAC address */
3316 	read_mac_address(ndev, pd->mac_addr);
3317 	if (!is_valid_ether_addr(ndev->dev_addr)) {
3318 		dev_warn(&pdev->dev,
3319 			 "no valid MAC address supplied, using a random one.\n");
3320 		eth_hw_addr_random(ndev);
3321 	}
3322 
3323 	if (mdp->cd->tsu) {
3324 		int port = pdev->id < 0 ? 0 : pdev->id % 2;
3325 		struct resource *rtsu;
3326 
3327 		rtsu = platform_get_resource(pdev, IORESOURCE_MEM, 1);
3328 		if (!rtsu) {
3329 			dev_err(&pdev->dev, "no TSU resource\n");
3330 			ret = -ENODEV;
3331 			goto out_release;
3332 		}
3333 		/* We can only request the  TSU region  for the first port
3334 		 * of the two  sharing this TSU for the probe to succeed...
3335 		 */
3336 		if (port == 0 &&
3337 		    !devm_request_mem_region(&pdev->dev, rtsu->start,
3338 					     resource_size(rtsu),
3339 					     dev_name(&pdev->dev))) {
3340 			dev_err(&pdev->dev, "can't request TSU resource.\n");
3341 			ret = -EBUSY;
3342 			goto out_release;
3343 		}
3344 		/* ioremap the TSU registers */
3345 		mdp->tsu_addr = devm_ioremap(&pdev->dev, rtsu->start,
3346 					     resource_size(rtsu));
3347 		if (!mdp->tsu_addr) {
3348 			dev_err(&pdev->dev, "TSU region ioremap() failed.\n");
3349 			ret = -ENOMEM;
3350 			goto out_release;
3351 		}
3352 		mdp->port = port;
3353 		ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
3354 
3355 		/* Need to init only the first port of the two sharing a TSU */
3356 		if (port == 0) {
3357 			if (mdp->cd->chip_reset)
3358 				mdp->cd->chip_reset(ndev);
3359 
3360 			/* TSU init (Init only)*/
3361 			sh_eth_tsu_init(mdp);
3362 		}
3363 	}
3364 
3365 	if (mdp->cd->rmiimode)
3366 		sh_eth_write(ndev, 0x1, RMIIMODE);
3367 
3368 	/* MDIO bus init */
3369 	ret = sh_mdio_init(mdp, pd);
3370 	if (ret) {
3371 		dev_err_probe(&pdev->dev, ret, "MDIO init failed\n");
3372 		goto out_release;
3373 	}
3374 
3375 	netif_napi_add(ndev, &mdp->napi, sh_eth_poll, 64);
3376 
3377 	/* network device register */
3378 	ret = register_netdev(ndev);
3379 	if (ret)
3380 		goto out_napi_del;
3381 
3382 	if (mdp->cd->magic)
3383 		device_set_wakeup_capable(&pdev->dev, 1);
3384 
3385 	/* print device information */
3386 	netdev_info(ndev, "Base address at 0x%x, %pM, IRQ %d.\n",
3387 		    (u32)ndev->base_addr, ndev->dev_addr, ndev->irq);
3388 
3389 	pm_runtime_put(&pdev->dev);
3390 	platform_set_drvdata(pdev, ndev);
3391 
3392 	return ret;
3393 
3394 out_napi_del:
3395 	netif_napi_del(&mdp->napi);
3396 	sh_mdio_release(mdp);
3397 
3398 out_release:
3399 	/* net_dev free */
3400 	free_netdev(ndev);
3401 
3402 	pm_runtime_put(&pdev->dev);
3403 	pm_runtime_disable(&pdev->dev);
3404 	return ret;
3405 }
3406 
3407 static int sh_eth_drv_remove(struct platform_device *pdev)
3408 {
3409 	struct net_device *ndev = platform_get_drvdata(pdev);
3410 	struct sh_eth_private *mdp = netdev_priv(ndev);
3411 
3412 	unregister_netdev(ndev);
3413 	netif_napi_del(&mdp->napi);
3414 	sh_mdio_release(mdp);
3415 	pm_runtime_disable(&pdev->dev);
3416 	free_netdev(ndev);
3417 
3418 	return 0;
3419 }
3420 
3421 #ifdef CONFIG_PM
3422 #ifdef CONFIG_PM_SLEEP
3423 static int sh_eth_wol_setup(struct net_device *ndev)
3424 {
3425 	struct sh_eth_private *mdp = netdev_priv(ndev);
3426 
3427 	/* Only allow ECI interrupts */
3428 	synchronize_irq(ndev->irq);
3429 	napi_disable(&mdp->napi);
3430 	sh_eth_write(ndev, EESIPR_ECIIP, EESIPR);
3431 
3432 	/* Enable MagicPacket */
3433 	sh_eth_modify(ndev, ECMR, ECMR_MPDE, ECMR_MPDE);
3434 
3435 	return enable_irq_wake(ndev->irq);
3436 }
3437 
3438 static int sh_eth_wol_restore(struct net_device *ndev)
3439 {
3440 	struct sh_eth_private *mdp = netdev_priv(ndev);
3441 	int ret;
3442 
3443 	napi_enable(&mdp->napi);
3444 
3445 	/* Disable MagicPacket */
3446 	sh_eth_modify(ndev, ECMR, ECMR_MPDE, 0);
3447 
3448 	/* The device needs to be reset to restore MagicPacket logic
3449 	 * for next wakeup. If we close and open the device it will
3450 	 * both be reset and all registers restored. This is what
3451 	 * happens during suspend and resume without WoL enabled.
3452 	 */
3453 	ret = sh_eth_close(ndev);
3454 	if (ret < 0)
3455 		return ret;
3456 	ret = sh_eth_open(ndev);
3457 	if (ret < 0)
3458 		return ret;
3459 
3460 	return disable_irq_wake(ndev->irq);
3461 }
3462 
3463 static int sh_eth_suspend(struct device *dev)
3464 {
3465 	struct net_device *ndev = dev_get_drvdata(dev);
3466 	struct sh_eth_private *mdp = netdev_priv(ndev);
3467 	int ret = 0;
3468 
3469 	if (!netif_running(ndev))
3470 		return 0;
3471 
3472 	netif_device_detach(ndev);
3473 
3474 	if (mdp->wol_enabled)
3475 		ret = sh_eth_wol_setup(ndev);
3476 	else
3477 		ret = sh_eth_close(ndev);
3478 
3479 	return ret;
3480 }
3481 
3482 static int sh_eth_resume(struct device *dev)
3483 {
3484 	struct net_device *ndev = dev_get_drvdata(dev);
3485 	struct sh_eth_private *mdp = netdev_priv(ndev);
3486 	int ret = 0;
3487 
3488 	if (!netif_running(ndev))
3489 		return 0;
3490 
3491 	if (mdp->wol_enabled)
3492 		ret = sh_eth_wol_restore(ndev);
3493 	else
3494 		ret = sh_eth_open(ndev);
3495 
3496 	if (ret < 0)
3497 		return ret;
3498 
3499 	netif_device_attach(ndev);
3500 
3501 	return ret;
3502 }
3503 #endif
3504 
3505 static int sh_eth_runtime_nop(struct device *dev)
3506 {
3507 	/* Runtime PM callback shared between ->runtime_suspend()
3508 	 * and ->runtime_resume(). Simply returns success.
3509 	 *
3510 	 * This driver re-initializes all registers after
3511 	 * pm_runtime_get_sync() anyway so there is no need
3512 	 * to save and restore registers here.
3513 	 */
3514 	return 0;
3515 }
3516 
3517 static const struct dev_pm_ops sh_eth_dev_pm_ops = {
3518 	SET_SYSTEM_SLEEP_PM_OPS(sh_eth_suspend, sh_eth_resume)
3519 	SET_RUNTIME_PM_OPS(sh_eth_runtime_nop, sh_eth_runtime_nop, NULL)
3520 };
3521 #define SH_ETH_PM_OPS (&sh_eth_dev_pm_ops)
3522 #else
3523 #define SH_ETH_PM_OPS NULL
3524 #endif
3525 
3526 static const struct platform_device_id sh_eth_id_table[] = {
3527 	{ "sh7619-ether", (kernel_ulong_t)&sh7619_data },
3528 	{ "sh771x-ether", (kernel_ulong_t)&sh771x_data },
3529 	{ "sh7724-ether", (kernel_ulong_t)&sh7724_data },
3530 	{ "sh7734-gether", (kernel_ulong_t)&sh7734_data },
3531 	{ "sh7757-ether", (kernel_ulong_t)&sh7757_data },
3532 	{ "sh7757-gether", (kernel_ulong_t)&sh7757_data_giga },
3533 	{ "sh7763-gether", (kernel_ulong_t)&sh7763_data },
3534 	{ }
3535 };
3536 MODULE_DEVICE_TABLE(platform, sh_eth_id_table);
3537 
3538 static struct platform_driver sh_eth_driver = {
3539 	.probe = sh_eth_drv_probe,
3540 	.remove = sh_eth_drv_remove,
3541 	.id_table = sh_eth_id_table,
3542 	.driver = {
3543 		   .name = CARDNAME,
3544 		   .pm = SH_ETH_PM_OPS,
3545 		   .of_match_table = of_match_ptr(sh_eth_match_table),
3546 	},
3547 };
3548 
3549 module_platform_driver(sh_eth_driver);
3550 
3551 MODULE_AUTHOR("Nobuhiro Iwamatsu, Yoshihiro Shimoda");
3552 MODULE_DESCRIPTION("Renesas SuperH Ethernet driver");
3553 MODULE_LICENSE("GPL v2");
3554