Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

Linux/drivers/net/ethernet/renesas/sh_eth.c

  1 /*  SuperH Ethernet device driver
  2  *
  3  *  Copyright (C) 2006-2012 Nobuhiro Iwamatsu
  4  *  Copyright (C) 2008-2014 Renesas Solutions Corp.
  5  *  Copyright (C) 2013-2014 Cogent Embedded, Inc.
  6  *  Copyright (C) 2014 Codethink Limited
  7  *
  8  *  This program is free software; you can redistribute it and/or modify it
  9  *  under the terms and conditions of the GNU General Public License,
 10  *  version 2, as published by the Free Software Foundation.
 11  *
 12  *  This program is distributed in the hope it will be useful, but WITHOUT
 13  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 14  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 15  *  more details.
 16  *
 17  *  The full GNU General Public License is included in this distribution in
 18  *  the file called "COPYING".
 19  */
 20 
 21 #include <linux/module.h>
 22 #include <linux/kernel.h>
 23 #include <linux/spinlock.h>
 24 #include <linux/interrupt.h>
 25 #include <linux/dma-mapping.h>
 26 #include <linux/etherdevice.h>
 27 #include <linux/delay.h>
 28 #include <linux/platform_device.h>
 29 #include <linux/mdio-bitbang.h>
 30 #include <linux/netdevice.h>
 31 #include <linux/of.h>
 32 #include <linux/of_device.h>
 33 #include <linux/of_irq.h>
 34 #include <linux/of_net.h>
 35 #include <linux/phy.h>
 36 #include <linux/cache.h>
 37 #include <linux/io.h>
 38 #include <linux/pm_runtime.h>
 39 #include <linux/slab.h>
 40 #include <linux/ethtool.h>
 41 #include <linux/if_vlan.h>
 42 #include <linux/clk.h>
 43 #include <linux/sh_eth.h>
 44 #include <linux/of_mdio.h>
 45 
 46 #include "sh_eth.h"
 47 
 48 #define SH_ETH_DEF_MSG_ENABLE \
 49                 (NETIF_MSG_LINK | \
 50                 NETIF_MSG_TIMER | \
 51                 NETIF_MSG_RX_ERR| \
 52                 NETIF_MSG_TX_ERR)
 53 
 54 static const u16 sh_eth_offset_gigabit[SH_ETH_MAX_REGISTER_OFFSET] = {
 55         [EDSR]          = 0x0000,
 56         [EDMR]          = 0x0400,
 57         [EDTRR]         = 0x0408,
 58         [EDRRR]         = 0x0410,
 59         [EESR]          = 0x0428,
 60         [EESIPR]        = 0x0430,
 61         [TDLAR]         = 0x0010,
 62         [TDFAR]         = 0x0014,
 63         [TDFXR]         = 0x0018,
 64         [TDFFR]         = 0x001c,
 65         [RDLAR]         = 0x0030,
 66         [RDFAR]         = 0x0034,
 67         [RDFXR]         = 0x0038,
 68         [RDFFR]         = 0x003c,
 69         [TRSCER]        = 0x0438,
 70         [RMFCR]         = 0x0440,
 71         [TFTR]          = 0x0448,
 72         [FDR]           = 0x0450,
 73         [RMCR]          = 0x0458,
 74         [RPADIR]        = 0x0460,
 75         [FCFTR]         = 0x0468,
 76         [CSMR]          = 0x04E4,
 77 
 78         [ECMR]          = 0x0500,
 79         [ECSR]          = 0x0510,
 80         [ECSIPR]        = 0x0518,
 81         [PIR]           = 0x0520,
 82         [PSR]           = 0x0528,
 83         [PIPR]          = 0x052c,
 84         [RFLR]          = 0x0508,
 85         [APR]           = 0x0554,
 86         [MPR]           = 0x0558,
 87         [PFTCR]         = 0x055c,
 88         [PFRCR]         = 0x0560,
 89         [TPAUSER]       = 0x0564,
 90         [GECMR]         = 0x05b0,
 91         [BCULR]         = 0x05b4,
 92         [MAHR]          = 0x05c0,
 93         [MALR]          = 0x05c8,
 94         [TROCR]         = 0x0700,
 95         [CDCR]          = 0x0708,
 96         [LCCR]          = 0x0710,
 97         [CEFCR]         = 0x0740,
 98         [FRECR]         = 0x0748,
 99         [TSFRCR]        = 0x0750,
100         [TLFRCR]        = 0x0758,
101         [RFCR]          = 0x0760,
102         [CERCR]         = 0x0768,
103         [CEECR]         = 0x0770,
104         [MAFCR]         = 0x0778,
105         [RMII_MII]      = 0x0790,
106 
107         [ARSTR]         = 0x0000,
108         [TSU_CTRST]     = 0x0004,
109         [TSU_FWEN0]     = 0x0010,
110         [TSU_FWEN1]     = 0x0014,
111         [TSU_FCM]       = 0x0018,
112         [TSU_BSYSL0]    = 0x0020,
113         [TSU_BSYSL1]    = 0x0024,
114         [TSU_PRISL0]    = 0x0028,
115         [TSU_PRISL1]    = 0x002c,
116         [TSU_FWSL0]     = 0x0030,
117         [TSU_FWSL1]     = 0x0034,
118         [TSU_FWSLC]     = 0x0038,
119         [TSU_QTAG0]     = 0x0040,
120         [TSU_QTAG1]     = 0x0044,
121         [TSU_FWSR]      = 0x0050,
122         [TSU_FWINMK]    = 0x0054,
123         [TSU_ADQT0]     = 0x0048,
124         [TSU_ADQT1]     = 0x004c,
125         [TSU_VTAG0]     = 0x0058,
126         [TSU_VTAG1]     = 0x005c,
127         [TSU_ADSBSY]    = 0x0060,
128         [TSU_TEN]       = 0x0064,
129         [TSU_POST1]     = 0x0070,
130         [TSU_POST2]     = 0x0074,
131         [TSU_POST3]     = 0x0078,
132         [TSU_POST4]     = 0x007c,
133         [TSU_ADRH0]     = 0x0100,
134         [TSU_ADRL0]     = 0x0104,
135         [TSU_ADRH31]    = 0x01f8,
136         [TSU_ADRL31]    = 0x01fc,
137 
138         [TXNLCR0]       = 0x0080,
139         [TXALCR0]       = 0x0084,
140         [RXNLCR0]       = 0x0088,
141         [RXALCR0]       = 0x008c,
142         [FWNLCR0]       = 0x0090,
143         [FWALCR0]       = 0x0094,
144         [TXNLCR1]       = 0x00a0,
145         [TXALCR1]       = 0x00a0,
146         [RXNLCR1]       = 0x00a8,
147         [RXALCR1]       = 0x00ac,
148         [FWNLCR1]       = 0x00b0,
149         [FWALCR1]       = 0x00b4,
150 };
151 
152 static const u16 sh_eth_offset_fast_rz[SH_ETH_MAX_REGISTER_OFFSET] = {
153         [EDSR]          = 0x0000,
154         [EDMR]          = 0x0400,
155         [EDTRR]         = 0x0408,
156         [EDRRR]         = 0x0410,
157         [EESR]          = 0x0428,
158         [EESIPR]        = 0x0430,
159         [TDLAR]         = 0x0010,
160         [TDFAR]         = 0x0014,
161         [TDFXR]         = 0x0018,
162         [TDFFR]         = 0x001c,
163         [RDLAR]         = 0x0030,
164         [RDFAR]         = 0x0034,
165         [RDFXR]         = 0x0038,
166         [RDFFR]         = 0x003c,
167         [TRSCER]        = 0x0438,
168         [RMFCR]         = 0x0440,
169         [TFTR]          = 0x0448,
170         [FDR]           = 0x0450,
171         [RMCR]          = 0x0458,
172         [RPADIR]        = 0x0460,
173         [FCFTR]         = 0x0468,
174         [CSMR]          = 0x04E4,
175 
176         [ECMR]          = 0x0500,
177         [RFLR]          = 0x0508,
178         [ECSR]          = 0x0510,
179         [ECSIPR]        = 0x0518,
180         [PIR]           = 0x0520,
181         [APR]           = 0x0554,
182         [MPR]           = 0x0558,
183         [PFTCR]         = 0x055c,
184         [PFRCR]         = 0x0560,
185         [TPAUSER]       = 0x0564,
186         [MAHR]          = 0x05c0,
187         [MALR]          = 0x05c8,
188         [CEFCR]         = 0x0740,
189         [FRECR]         = 0x0748,
190         [TSFRCR]        = 0x0750,
191         [TLFRCR]        = 0x0758,
192         [RFCR]          = 0x0760,
193         [MAFCR]         = 0x0778,
194 
195         [ARSTR]         = 0x0000,
196         [TSU_CTRST]     = 0x0004,
197         [TSU_VTAG0]     = 0x0058,
198         [TSU_ADSBSY]    = 0x0060,
199         [TSU_TEN]       = 0x0064,
200         [TSU_ADRH0]     = 0x0100,
201         [TSU_ADRL0]     = 0x0104,
202         [TSU_ADRH31]    = 0x01f8,
203         [TSU_ADRL31]    = 0x01fc,
204 
205         [TXNLCR0]       = 0x0080,
206         [TXALCR0]       = 0x0084,
207         [RXNLCR0]       = 0x0088,
208         [RXALCR0]       = 0x008C,
209 };
210 
211 static const u16 sh_eth_offset_fast_rcar[SH_ETH_MAX_REGISTER_OFFSET] = {
212         [ECMR]          = 0x0300,
213         [RFLR]          = 0x0308,
214         [ECSR]          = 0x0310,
215         [ECSIPR]        = 0x0318,
216         [PIR]           = 0x0320,
217         [PSR]           = 0x0328,
218         [RDMLR]         = 0x0340,
219         [IPGR]          = 0x0350,
220         [APR]           = 0x0354,
221         [MPR]           = 0x0358,
222         [RFCF]          = 0x0360,
223         [TPAUSER]       = 0x0364,
224         [TPAUSECR]      = 0x0368,
225         [MAHR]          = 0x03c0,
226         [MALR]          = 0x03c8,
227         [TROCR]         = 0x03d0,
228         [CDCR]          = 0x03d4,
229         [LCCR]          = 0x03d8,
230         [CNDCR]         = 0x03dc,
231         [CEFCR]         = 0x03e4,
232         [FRECR]         = 0x03e8,
233         [TSFRCR]        = 0x03ec,
234         [TLFRCR]        = 0x03f0,
235         [RFCR]          = 0x03f4,
236         [MAFCR]         = 0x03f8,
237 
238         [EDMR]          = 0x0200,
239         [EDTRR]         = 0x0208,
240         [EDRRR]         = 0x0210,
241         [TDLAR]         = 0x0218,
242         [RDLAR]         = 0x0220,
243         [EESR]          = 0x0228,
244         [EESIPR]        = 0x0230,
245         [TRSCER]        = 0x0238,
246         [RMFCR]         = 0x0240,
247         [TFTR]          = 0x0248,
248         [FDR]           = 0x0250,
249         [RMCR]          = 0x0258,
250         [TFUCR]         = 0x0264,
251         [RFOCR]         = 0x0268,
252         [RMIIMODE]      = 0x026c,
253         [FCFTR]         = 0x0270,
254         [TRIMD]         = 0x027c,
255 };
256 
257 static const u16 sh_eth_offset_fast_sh4[SH_ETH_MAX_REGISTER_OFFSET] = {
258         [ECMR]          = 0x0100,
259         [RFLR]          = 0x0108,
260         [ECSR]          = 0x0110,
261         [ECSIPR]        = 0x0118,
262         [PIR]           = 0x0120,
263         [PSR]           = 0x0128,
264         [RDMLR]         = 0x0140,
265         [IPGR]          = 0x0150,
266         [APR]           = 0x0154,
267         [MPR]           = 0x0158,
268         [TPAUSER]       = 0x0164,
269         [RFCF]          = 0x0160,
270         [TPAUSECR]      = 0x0168,
271         [BCFRR]         = 0x016c,
272         [MAHR]          = 0x01c0,
273         [MALR]          = 0x01c8,
274         [TROCR]         = 0x01d0,
275         [CDCR]          = 0x01d4,
276         [LCCR]          = 0x01d8,
277         [CNDCR]         = 0x01dc,
278         [CEFCR]         = 0x01e4,
279         [FRECR]         = 0x01e8,
280         [TSFRCR]        = 0x01ec,
281         [TLFRCR]        = 0x01f0,
282         [RFCR]          = 0x01f4,
283         [MAFCR]         = 0x01f8,
284         [RTRATE]        = 0x01fc,
285 
286         [EDMR]          = 0x0000,
287         [EDTRR]         = 0x0008,
288         [EDRRR]         = 0x0010,
289         [TDLAR]         = 0x0018,
290         [RDLAR]         = 0x0020,
291         [EESR]          = 0x0028,
292         [EESIPR]        = 0x0030,
293         [TRSCER]        = 0x0038,
294         [RMFCR]         = 0x0040,
295         [TFTR]          = 0x0048,
296         [FDR]           = 0x0050,
297         [RMCR]          = 0x0058,
298         [TFUCR]         = 0x0064,
299         [RFOCR]         = 0x0068,
300         [FCFTR]         = 0x0070,
301         [RPADIR]        = 0x0078,
302         [TRIMD]         = 0x007c,
303         [RBWAR]         = 0x00c8,
304         [RDFAR]         = 0x00cc,
305         [TBRAR]         = 0x00d4,
306         [TDFAR]         = 0x00d8,
307 };
308 
309 static const u16 sh_eth_offset_fast_sh3_sh2[SH_ETH_MAX_REGISTER_OFFSET] = {
310         [EDMR]          = 0x0000,
311         [EDTRR]         = 0x0004,
312         [EDRRR]         = 0x0008,
313         [TDLAR]         = 0x000c,
314         [RDLAR]         = 0x0010,
315         [EESR]          = 0x0014,
316         [EESIPR]        = 0x0018,
317         [TRSCER]        = 0x001c,
318         [RMFCR]         = 0x0020,
319         [TFTR]          = 0x0024,
320         [FDR]           = 0x0028,
321         [RMCR]          = 0x002c,
322         [EDOCR]         = 0x0030,
323         [FCFTR]         = 0x0034,
324         [RPADIR]        = 0x0038,
325         [TRIMD]         = 0x003c,
326         [RBWAR]         = 0x0040,
327         [RDFAR]         = 0x0044,
328         [TBRAR]         = 0x004c,
329         [TDFAR]         = 0x0050,
330 
331         [ECMR]          = 0x0160,
332         [ECSR]          = 0x0164,
333         [ECSIPR]        = 0x0168,
334         [PIR]           = 0x016c,
335         [MAHR]          = 0x0170,
336         [MALR]          = 0x0174,
337         [RFLR]          = 0x0178,
338         [PSR]           = 0x017c,
339         [TROCR]         = 0x0180,
340         [CDCR]          = 0x0184,
341         [LCCR]          = 0x0188,
342         [CNDCR]         = 0x018c,
343         [CEFCR]         = 0x0194,
344         [FRECR]         = 0x0198,
345         [TSFRCR]        = 0x019c,
346         [TLFRCR]        = 0x01a0,
347         [RFCR]          = 0x01a4,
348         [MAFCR]         = 0x01a8,
349         [IPGR]          = 0x01b4,
350         [APR]           = 0x01b8,
351         [MPR]           = 0x01bc,
352         [TPAUSER]       = 0x01c4,
353         [BCFR]          = 0x01cc,
354 
355         [ARSTR]         = 0x0000,
356         [TSU_CTRST]     = 0x0004,
357         [TSU_FWEN0]     = 0x0010,
358         [TSU_FWEN1]     = 0x0014,
359         [TSU_FCM]       = 0x0018,
360         [TSU_BSYSL0]    = 0x0020,
361         [TSU_BSYSL1]    = 0x0024,
362         [TSU_PRISL0]    = 0x0028,
363         [TSU_PRISL1]    = 0x002c,
364         [TSU_FWSL0]     = 0x0030,
365         [TSU_FWSL1]     = 0x0034,
366         [TSU_FWSLC]     = 0x0038,
367         [TSU_QTAGM0]    = 0x0040,
368         [TSU_QTAGM1]    = 0x0044,
369         [TSU_ADQT0]     = 0x0048,
370         [TSU_ADQT1]     = 0x004c,
371         [TSU_FWSR]      = 0x0050,
372         [TSU_FWINMK]    = 0x0054,
373         [TSU_ADSBSY]    = 0x0060,
374         [TSU_TEN]       = 0x0064,
375         [TSU_POST1]     = 0x0070,
376         [TSU_POST2]     = 0x0074,
377         [TSU_POST3]     = 0x0078,
378         [TSU_POST4]     = 0x007c,
379 
380         [TXNLCR0]       = 0x0080,
381         [TXALCR0]       = 0x0084,
382         [RXNLCR0]       = 0x0088,
383         [RXALCR0]       = 0x008c,
384         [FWNLCR0]       = 0x0090,
385         [FWALCR0]       = 0x0094,
386         [TXNLCR1]       = 0x00a0,
387         [TXALCR1]       = 0x00a0,
388         [RXNLCR1]       = 0x00a8,
389         [RXALCR1]       = 0x00ac,
390         [FWNLCR1]       = 0x00b0,
391         [FWALCR1]       = 0x00b4,
392 
393         [TSU_ADRH0]     = 0x0100,
394         [TSU_ADRL0]     = 0x0104,
395         [TSU_ADRL31]    = 0x01fc,
396 };
397 
398 static bool sh_eth_is_gether(struct sh_eth_private *mdp)
399 {
400         return mdp->reg_offset == sh_eth_offset_gigabit;
401 }
402 
403 static bool sh_eth_is_rz_fast_ether(struct sh_eth_private *mdp)
404 {
405         return mdp->reg_offset == sh_eth_offset_fast_rz;
406 }
407 
408 static void sh_eth_select_mii(struct net_device *ndev)
409 {
410         u32 value = 0x0;
411         struct sh_eth_private *mdp = netdev_priv(ndev);
412 
413         switch (mdp->phy_interface) {
414         case PHY_INTERFACE_MODE_GMII:
415                 value = 0x2;
416                 break;
417         case PHY_INTERFACE_MODE_MII:
418                 value = 0x1;
419                 break;
420         case PHY_INTERFACE_MODE_RMII:
421                 value = 0x0;
422                 break;
423         default:
424                 netdev_warn(ndev,
425                             "PHY interface mode was not setup. Set to MII.\n");
426                 value = 0x1;
427                 break;
428         }
429 
430         sh_eth_write(ndev, value, RMII_MII);
431 }
432 
433 static void sh_eth_set_duplex(struct net_device *ndev)
434 {
435         struct sh_eth_private *mdp = netdev_priv(ndev);
436 
437         if (mdp->duplex) /* Full */
438                 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | ECMR_DM, ECMR);
439         else            /* Half */
440                 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) & ~ECMR_DM, ECMR);
441 }
442 
443 /* There is CPU dependent code */
444 static void sh_eth_set_rate_r8a777x(struct net_device *ndev)
445 {
446         struct sh_eth_private *mdp = netdev_priv(ndev);
447 
448         switch (mdp->speed) {
449         case 10: /* 10BASE */
450                 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) & ~ECMR_ELB, ECMR);
451                 break;
452         case 100:/* 100BASE */
453                 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | ECMR_ELB, ECMR);
454                 break;
455         default:
456                 break;
457         }
458 }
459 
460 /* R8A7778/9 */
461 static struct sh_eth_cpu_data r8a777x_data = {
462         .set_duplex     = sh_eth_set_duplex,
463         .set_rate       = sh_eth_set_rate_r8a777x,
464 
465         .register_type  = SH_ETH_REG_FAST_RCAR,
466 
467         .ecsr_value     = ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
468         .ecsipr_value   = ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
469         .eesipr_value   = 0x01ff009f,
470 
471         .tx_check       = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
472         .eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
473                           EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
474                           EESR_ECI,
475 
476         .apr            = 1,
477         .mpr            = 1,
478         .tpauser        = 1,
479         .hw_swap        = 1,
480 };
481 
482 /* R8A7790/1 */
483 static struct sh_eth_cpu_data r8a779x_data = {
484         .set_duplex     = sh_eth_set_duplex,
485         .set_rate       = sh_eth_set_rate_r8a777x,
486 
487         .register_type  = SH_ETH_REG_FAST_RCAR,
488 
489         .ecsr_value     = ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
490         .ecsipr_value   = ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
491         .eesipr_value   = 0x01ff009f,
492 
493         .tx_check       = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
494         .eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
495                           EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
496                           EESR_ECI,
497 
498         .apr            = 1,
499         .mpr            = 1,
500         .tpauser        = 1,
501         .hw_swap        = 1,
502         .rmiimode       = 1,
503         .shift_rd0      = 1,
504 };
505 
506 static void sh_eth_set_rate_sh7724(struct net_device *ndev)
507 {
508         struct sh_eth_private *mdp = netdev_priv(ndev);
509 
510         switch (mdp->speed) {
511         case 10: /* 10BASE */
512                 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) & ~ECMR_RTM, ECMR);
513                 break;
514         case 100:/* 100BASE */
515                 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | ECMR_RTM, ECMR);
516                 break;
517         default:
518                 break;
519         }
520 }
521 
522 /* SH7724 */
523 static struct sh_eth_cpu_data sh7724_data = {
524         .set_duplex     = sh_eth_set_duplex,
525         .set_rate       = sh_eth_set_rate_sh7724,
526 
527         .register_type  = SH_ETH_REG_FAST_SH4,
528 
529         .ecsr_value     = ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
530         .ecsipr_value   = ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
531         .eesipr_value   = 0x01ff009f,
532 
533         .tx_check       = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
534         .eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
535                           EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
536                           EESR_ECI,
537 
538         .apr            = 1,
539         .mpr            = 1,
540         .tpauser        = 1,
541         .hw_swap        = 1,
542         .rpadir         = 1,
543         .rpadir_value   = 0x00020000, /* NET_IP_ALIGN assumed to be 2 */
544 };
545 
546 static void sh_eth_set_rate_sh7757(struct net_device *ndev)
547 {
548         struct sh_eth_private *mdp = netdev_priv(ndev);
549 
550         switch (mdp->speed) {
551         case 10: /* 10BASE */
552                 sh_eth_write(ndev, 0, RTRATE);
553                 break;
554         case 100:/* 100BASE */
555                 sh_eth_write(ndev, 1, RTRATE);
556                 break;
557         default:
558                 break;
559         }
560 }
561 
562 /* SH7757 */
563 static struct sh_eth_cpu_data sh7757_data = {
564         .set_duplex     = sh_eth_set_duplex,
565         .set_rate       = sh_eth_set_rate_sh7757,
566 
567         .register_type  = SH_ETH_REG_FAST_SH4,
568 
569         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
570 
571         .tx_check       = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
572         .eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
573                           EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
574                           EESR_ECI,
575 
576         .irq_flags      = IRQF_SHARED,
577         .apr            = 1,
578         .mpr            = 1,
579         .tpauser        = 1,
580         .hw_swap        = 1,
581         .no_ade         = 1,
582         .rpadir         = 1,
583         .rpadir_value   = 2 << 16,
584 };
585 
586 #define SH_GIGA_ETH_BASE        0xfee00000UL
587 #define GIGA_MALR(port)         (SH_GIGA_ETH_BASE + 0x800 * (port) + 0x05c8)
588 #define GIGA_MAHR(port)         (SH_GIGA_ETH_BASE + 0x800 * (port) + 0x05c0)
589 static void sh_eth_chip_reset_giga(struct net_device *ndev)
590 {
591         int i;
592         unsigned long mahr[2], malr[2];
593 
594         /* save MAHR and MALR */
595         for (i = 0; i < 2; i++) {
596                 malr[i] = ioread32((void *)GIGA_MALR(i));
597                 mahr[i] = ioread32((void *)GIGA_MAHR(i));
598         }
599 
600         /* reset device */
601         iowrite32(ARSTR_ARSTR, (void *)(SH_GIGA_ETH_BASE + 0x1800));
602         mdelay(1);
603 
604         /* restore MAHR and MALR */
605         for (i = 0; i < 2; i++) {
606                 iowrite32(malr[i], (void *)GIGA_MALR(i));
607                 iowrite32(mahr[i], (void *)GIGA_MAHR(i));
608         }
609 }
610 
611 static void sh_eth_set_rate_giga(struct net_device *ndev)
612 {
613         struct sh_eth_private *mdp = netdev_priv(ndev);
614 
615         switch (mdp->speed) {
616         case 10: /* 10BASE */
617                 sh_eth_write(ndev, 0x00000000, GECMR);
618                 break;
619         case 100:/* 100BASE */
620                 sh_eth_write(ndev, 0x00000010, GECMR);
621                 break;
622         case 1000: /* 1000BASE */
623                 sh_eth_write(ndev, 0x00000020, GECMR);
624                 break;
625         default:
626                 break;
627         }
628 }
629 
630 /* SH7757(GETHERC) */
631 static struct sh_eth_cpu_data sh7757_data_giga = {
632         .chip_reset     = sh_eth_chip_reset_giga,
633         .set_duplex     = sh_eth_set_duplex,
634         .set_rate       = sh_eth_set_rate_giga,
635 
636         .register_type  = SH_ETH_REG_GIGABIT,
637 
638         .ecsr_value     = ECSR_ICD | ECSR_MPD,
639         .ecsipr_value   = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
640         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
641 
642         .tx_check       = EESR_TC1 | EESR_FTC,
643         .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
644                           EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
645                           EESR_TDE | EESR_ECI,
646         .fdr_value      = 0x0000072f,
647 
648         .irq_flags      = IRQF_SHARED,
649         .apr            = 1,
650         .mpr            = 1,
651         .tpauser        = 1,
652         .bculr          = 1,
653         .hw_swap        = 1,
654         .rpadir         = 1,
655         .rpadir_value   = 2 << 16,
656         .no_trimd       = 1,
657         .no_ade         = 1,
658         .tsu            = 1,
659 };
660 
661 static void sh_eth_chip_reset(struct net_device *ndev)
662 {
663         struct sh_eth_private *mdp = netdev_priv(ndev);
664 
665         /* reset device */
666         sh_eth_tsu_write(mdp, ARSTR_ARSTR, ARSTR);
667         mdelay(1);
668 }
669 
670 static void sh_eth_set_rate_gether(struct net_device *ndev)
671 {
672         struct sh_eth_private *mdp = netdev_priv(ndev);
673 
674         switch (mdp->speed) {
675         case 10: /* 10BASE */
676                 sh_eth_write(ndev, GECMR_10, GECMR);
677                 break;
678         case 100:/* 100BASE */
679                 sh_eth_write(ndev, GECMR_100, GECMR);
680                 break;
681         case 1000: /* 1000BASE */
682                 sh_eth_write(ndev, GECMR_1000, GECMR);
683                 break;
684         default:
685                 break;
686         }
687 }
688 
689 /* SH7734 */
690 static struct sh_eth_cpu_data sh7734_data = {
691         .chip_reset     = sh_eth_chip_reset,
692         .set_duplex     = sh_eth_set_duplex,
693         .set_rate       = sh_eth_set_rate_gether,
694 
695         .register_type  = SH_ETH_REG_GIGABIT,
696 
697         .ecsr_value     = ECSR_ICD | ECSR_MPD,
698         .ecsipr_value   = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
699         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
700 
701         .tx_check       = EESR_TC1 | EESR_FTC,
702         .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
703                           EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
704                           EESR_TDE | EESR_ECI,
705 
706         .apr            = 1,
707         .mpr            = 1,
708         .tpauser        = 1,
709         .bculr          = 1,
710         .hw_swap        = 1,
711         .no_trimd       = 1,
712         .no_ade         = 1,
713         .tsu            = 1,
714         .hw_crc         = 1,
715         .select_mii     = 1,
716 };
717 
718 /* SH7763 */
719 static struct sh_eth_cpu_data sh7763_data = {
720         .chip_reset     = sh_eth_chip_reset,
721         .set_duplex     = sh_eth_set_duplex,
722         .set_rate       = sh_eth_set_rate_gether,
723 
724         .register_type  = SH_ETH_REG_GIGABIT,
725 
726         .ecsr_value     = ECSR_ICD | ECSR_MPD,
727         .ecsipr_value   = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
728         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
729 
730         .tx_check       = EESR_TC1 | EESR_FTC,
731         .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
732                           EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
733                           EESR_ECI,
734 
735         .apr            = 1,
736         .mpr            = 1,
737         .tpauser        = 1,
738         .bculr          = 1,
739         .hw_swap        = 1,
740         .no_trimd       = 1,
741         .no_ade         = 1,
742         .tsu            = 1,
743         .irq_flags      = IRQF_SHARED,
744 };
745 
746 static void sh_eth_chip_reset_r8a7740(struct net_device *ndev)
747 {
748         struct sh_eth_private *mdp = netdev_priv(ndev);
749 
750         /* reset device */
751         sh_eth_tsu_write(mdp, ARSTR_ARSTR, ARSTR);
752         mdelay(1);
753 
754         sh_eth_select_mii(ndev);
755 }
756 
757 /* R8A7740 */
758 static struct sh_eth_cpu_data r8a7740_data = {
759         .chip_reset     = sh_eth_chip_reset_r8a7740,
760         .set_duplex     = sh_eth_set_duplex,
761         .set_rate       = sh_eth_set_rate_gether,
762 
763         .register_type  = SH_ETH_REG_GIGABIT,
764 
765         .ecsr_value     = ECSR_ICD | ECSR_MPD,
766         .ecsipr_value   = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
767         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
768 
769         .tx_check       = EESR_TC1 | EESR_FTC,
770         .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
771                           EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
772                           EESR_TDE | EESR_ECI,
773         .fdr_value      = 0x0000070f,
774 
775         .apr            = 1,
776         .mpr            = 1,
777         .tpauser        = 1,
778         .bculr          = 1,
779         .hw_swap        = 1,
780         .rpadir         = 1,
781         .rpadir_value   = 2 << 16,
782         .no_trimd       = 1,
783         .no_ade         = 1,
784         .tsu            = 1,
785         .select_mii     = 1,
786         .shift_rd0      = 1,
787 };
788 
789 /* R7S72100 */
790 static struct sh_eth_cpu_data r7s72100_data = {
791         .chip_reset     = sh_eth_chip_reset,
792         .set_duplex     = sh_eth_set_duplex,
793 
794         .register_type  = SH_ETH_REG_FAST_RZ,
795 
796         .ecsr_value     = ECSR_ICD,
797         .ecsipr_value   = ECSIPR_ICDIP,
798         .eesipr_value   = 0xff7f009f,
799 
800         .tx_check       = EESR_TC1 | EESR_FTC,
801         .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
802                           EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
803                           EESR_TDE | EESR_ECI,
804         .fdr_value      = 0x0000070f,
805 
806         .no_psr         = 1,
807         .apr            = 1,
808         .mpr            = 1,
809         .tpauser        = 1,
810         .hw_swap        = 1,
811         .rpadir         = 1,
812         .rpadir_value   = 2 << 16,
813         .no_trimd       = 1,
814         .no_ade         = 1,
815         .hw_crc         = 1,
816         .tsu            = 1,
817         .shift_rd0      = 1,
818 };
819 
820 static struct sh_eth_cpu_data sh7619_data = {
821         .register_type  = SH_ETH_REG_FAST_SH3_SH2,
822 
823         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
824 
825         .apr            = 1,
826         .mpr            = 1,
827         .tpauser        = 1,
828         .hw_swap        = 1,
829 };
830 
831 static struct sh_eth_cpu_data sh771x_data = {
832         .register_type  = SH_ETH_REG_FAST_SH3_SH2,
833 
834         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
835         .tsu            = 1,
836 };
837 
838 static void sh_eth_set_default_cpu_data(struct sh_eth_cpu_data *cd)
839 {
840         if (!cd->ecsr_value)
841                 cd->ecsr_value = DEFAULT_ECSR_INIT;
842 
843         if (!cd->ecsipr_value)
844                 cd->ecsipr_value = DEFAULT_ECSIPR_INIT;
845 
846         if (!cd->fcftr_value)
847                 cd->fcftr_value = DEFAULT_FIFO_F_D_RFF |
848                                   DEFAULT_FIFO_F_D_RFD;
849 
850         if (!cd->fdr_value)
851                 cd->fdr_value = DEFAULT_FDR_INIT;
852 
853         if (!cd->tx_check)
854                 cd->tx_check = DEFAULT_TX_CHECK;
855 
856         if (!cd->eesr_err_check)
857                 cd->eesr_err_check = DEFAULT_EESR_ERR_CHECK;
858 }
859 
860 static int sh_eth_check_reset(struct net_device *ndev)
861 {
862         int ret = 0;
863         int cnt = 100;
864 
865         while (cnt > 0) {
866                 if (!(sh_eth_read(ndev, EDMR) & 0x3))
867                         break;
868                 mdelay(1);
869                 cnt--;
870         }
871         if (cnt <= 0) {
872                 netdev_err(ndev, "Device reset failed\n");
873                 ret = -ETIMEDOUT;
874         }
875         return ret;
876 }
877 
878 static int sh_eth_reset(struct net_device *ndev)
879 {
880         struct sh_eth_private *mdp = netdev_priv(ndev);
881         int ret = 0;
882 
883         if (sh_eth_is_gether(mdp) || sh_eth_is_rz_fast_ether(mdp)) {
884                 sh_eth_write(ndev, EDSR_ENALL, EDSR);
885                 sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_GETHER,
886                              EDMR);
887 
888                 ret = sh_eth_check_reset(ndev);
889                 if (ret)
890                         return ret;
891 
892                 /* Table Init */
893                 sh_eth_write(ndev, 0x0, TDLAR);
894                 sh_eth_write(ndev, 0x0, TDFAR);
895                 sh_eth_write(ndev, 0x0, TDFXR);
896                 sh_eth_write(ndev, 0x0, TDFFR);
897                 sh_eth_write(ndev, 0x0, RDLAR);
898                 sh_eth_write(ndev, 0x0, RDFAR);
899                 sh_eth_write(ndev, 0x0, RDFXR);
900                 sh_eth_write(ndev, 0x0, RDFFR);
901 
902                 /* Reset HW CRC register */
903                 if (mdp->cd->hw_crc)
904                         sh_eth_write(ndev, 0x0, CSMR);
905 
906                 /* Select MII mode */
907                 if (mdp->cd->select_mii)
908                         sh_eth_select_mii(ndev);
909         } else {
910                 sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_ETHER,
911                              EDMR);
912                 mdelay(3);
913                 sh_eth_write(ndev, sh_eth_read(ndev, EDMR) & ~EDMR_SRST_ETHER,
914                              EDMR);
915         }
916 
917         return ret;
918 }
919 
920 #if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_SHMOBILE)
921 static void sh_eth_set_receive_align(struct sk_buff *skb)
922 {
923         int reserve;
924 
925         reserve = SH4_SKB_RX_ALIGN - ((u32)skb->data & (SH4_SKB_RX_ALIGN - 1));
926         if (reserve)
927                 skb_reserve(skb, reserve);
928 }
929 #else
930 static void sh_eth_set_receive_align(struct sk_buff *skb)
931 {
932         skb_reserve(skb, SH2_SH3_SKB_RX_ALIGN);
933 }
934 #endif
935 
936 
937 /* CPU <-> EDMAC endian convert */
938 static inline __u32 cpu_to_edmac(struct sh_eth_private *mdp, u32 x)
939 {
940         switch (mdp->edmac_endian) {
941         case EDMAC_LITTLE_ENDIAN:
942                 return cpu_to_le32(x);
943         case EDMAC_BIG_ENDIAN:
944                 return cpu_to_be32(x);
945         }
946         return x;
947 }
948 
949 static inline __u32 edmac_to_cpu(struct sh_eth_private *mdp, u32 x)
950 {
951         switch (mdp->edmac_endian) {
952         case EDMAC_LITTLE_ENDIAN:
953                 return le32_to_cpu(x);
954         case EDMAC_BIG_ENDIAN:
955                 return be32_to_cpu(x);
956         }
957         return x;
958 }
959 
960 /* Program the hardware MAC address from dev->dev_addr. */
961 static void update_mac_address(struct net_device *ndev)
962 {
963         sh_eth_write(ndev,
964                      (ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) |
965                      (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR);
966         sh_eth_write(ndev,
967                      (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]), MALR);
968 }
969 
970 /* Get MAC address from SuperH MAC address register
971  *
972  * SuperH's Ethernet device doesn't have 'ROM' to MAC address.
973  * This driver get MAC address that use by bootloader(U-boot or sh-ipl+g).
974  * When you want use this device, you must set MAC address in bootloader.
975  *
976  */
977 static void read_mac_address(struct net_device *ndev, unsigned char *mac)
978 {
979         if (mac[0] || mac[1] || mac[2] || mac[3] || mac[4] || mac[5]) {
980                 memcpy(ndev->dev_addr, mac, ETH_ALEN);
981         } else {
982                 ndev->dev_addr[0] = (sh_eth_read(ndev, MAHR) >> 24);
983                 ndev->dev_addr[1] = (sh_eth_read(ndev, MAHR) >> 16) & 0xFF;
984                 ndev->dev_addr[2] = (sh_eth_read(ndev, MAHR) >> 8) & 0xFF;
985                 ndev->dev_addr[3] = (sh_eth_read(ndev, MAHR) & 0xFF);
986                 ndev->dev_addr[4] = (sh_eth_read(ndev, MALR) >> 8) & 0xFF;
987                 ndev->dev_addr[5] = (sh_eth_read(ndev, MALR) & 0xFF);
988         }
989 }
990 
991 static unsigned long sh_eth_get_edtrr_trns(struct sh_eth_private *mdp)
992 {
993         if (sh_eth_is_gether(mdp) || sh_eth_is_rz_fast_ether(mdp))
994                 return EDTRR_TRNS_GETHER;
995         else
996                 return EDTRR_TRNS_ETHER;
997 }
998 
999 struct bb_info {
1000         void (*set_gate)(void *addr);
1001         struct mdiobb_ctrl ctrl;
1002         void *addr;
1003         u32 mmd_msk;/* MMD */
1004         u32 mdo_msk;
1005         u32 mdi_msk;
1006         u32 mdc_msk;
1007 };
1008 
1009 /* PHY bit set */
1010 static void bb_set(void *addr, u32 msk)
1011 {
1012         iowrite32(ioread32(addr) | msk, addr);
1013 }
1014 
1015 /* PHY bit clear */
1016 static void bb_clr(void *addr, u32 msk)
1017 {
1018         iowrite32((ioread32(addr) & ~msk), addr);
1019 }
1020 
1021 /* PHY bit read */
1022 static int bb_read(void *addr, u32 msk)
1023 {
1024         return (ioread32(addr) & msk) != 0;
1025 }
1026 
1027 /* Data I/O pin control */
1028 static void sh_mmd_ctrl(struct mdiobb_ctrl *ctrl, int bit)
1029 {
1030         struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
1031 
1032         if (bitbang->set_gate)
1033                 bitbang->set_gate(bitbang->addr);
1034 
1035         if (bit)
1036                 bb_set(bitbang->addr, bitbang->mmd_msk);
1037         else
1038                 bb_clr(bitbang->addr, bitbang->mmd_msk);
1039 }
1040 
1041 /* Set bit data*/
1042 static void sh_set_mdio(struct mdiobb_ctrl *ctrl, int bit)
1043 {
1044         struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
1045 
1046         if (bitbang->set_gate)
1047                 bitbang->set_gate(bitbang->addr);
1048 
1049         if (bit)
1050                 bb_set(bitbang->addr, bitbang->mdo_msk);
1051         else
1052                 bb_clr(bitbang->addr, bitbang->mdo_msk);
1053 }
1054 
1055 /* Get bit data*/
1056 static int sh_get_mdio(struct mdiobb_ctrl *ctrl)
1057 {
1058         struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
1059 
1060         if (bitbang->set_gate)
1061                 bitbang->set_gate(bitbang->addr);
1062 
1063         return bb_read(bitbang->addr, bitbang->mdi_msk);
1064 }
1065 
1066 /* MDC pin control */
1067 static void sh_mdc_ctrl(struct mdiobb_ctrl *ctrl, int bit)
1068 {
1069         struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
1070 
1071         if (bitbang->set_gate)
1072                 bitbang->set_gate(bitbang->addr);
1073 
1074         if (bit)
1075                 bb_set(bitbang->addr, bitbang->mdc_msk);
1076         else
1077                 bb_clr(bitbang->addr, bitbang->mdc_msk);
1078 }
1079 
1080 /* mdio bus control struct */
1081 static struct mdiobb_ops bb_ops = {
1082         .owner = THIS_MODULE,
1083         .set_mdc = sh_mdc_ctrl,
1084         .set_mdio_dir = sh_mmd_ctrl,
1085         .set_mdio_data = sh_set_mdio,
1086         .get_mdio_data = sh_get_mdio,
1087 };
1088 
1089 /* free skb and descriptor buffer */
1090 static void sh_eth_ring_free(struct net_device *ndev)
1091 {
1092         struct sh_eth_private *mdp = netdev_priv(ndev);
1093         int i;
1094 
1095         /* Free Rx skb ringbuffer */
1096         if (mdp->rx_skbuff) {
1097                 for (i = 0; i < mdp->num_rx_ring; i++)
1098                         dev_kfree_skb(mdp->rx_skbuff[i]);
1099         }
1100         kfree(mdp->rx_skbuff);
1101         mdp->rx_skbuff = NULL;
1102 
1103         /* Free Tx skb ringbuffer */
1104         if (mdp->tx_skbuff) {
1105                 for (i = 0; i < mdp->num_tx_ring; i++)
1106                         dev_kfree_skb(mdp->tx_skbuff[i]);
1107         }
1108         kfree(mdp->tx_skbuff);
1109         mdp->tx_skbuff = NULL;
1110 }
1111 
1112 /* format skb and descriptor buffer */
1113 static void sh_eth_ring_format(struct net_device *ndev)
1114 {
1115         struct sh_eth_private *mdp = netdev_priv(ndev);
1116         int i;
1117         struct sk_buff *skb;
1118         struct sh_eth_rxdesc *rxdesc = NULL;
1119         struct sh_eth_txdesc *txdesc = NULL;
1120         int rx_ringsize = sizeof(*rxdesc) * mdp->num_rx_ring;
1121         int tx_ringsize = sizeof(*txdesc) * mdp->num_tx_ring;
1122 
1123         mdp->cur_rx = 0;
1124         mdp->cur_tx = 0;
1125         mdp->dirty_rx = 0;
1126         mdp->dirty_tx = 0;
1127 
1128         memset(mdp->rx_ring, 0, rx_ringsize);
1129 
1130         /* build Rx ring buffer */
1131         for (i = 0; i < mdp->num_rx_ring; i++) {
1132                 /* skb */
1133                 mdp->rx_skbuff[i] = NULL;
1134                 skb = netdev_alloc_skb(ndev, mdp->rx_buf_sz);
1135                 mdp->rx_skbuff[i] = skb;
1136                 if (skb == NULL)
1137                         break;
1138                 dma_map_single(&ndev->dev, skb->data, mdp->rx_buf_sz,
1139                                DMA_FROM_DEVICE);
1140                 sh_eth_set_receive_align(skb);
1141 
1142                 /* RX descriptor */
1143                 rxdesc = &mdp->rx_ring[i];
1144                 rxdesc->addr = virt_to_phys(PTR_ALIGN(skb->data, 4));
1145                 rxdesc->status = cpu_to_edmac(mdp, RD_RACT | RD_RFP);
1146 
1147                 /* The size of the buffer is 16 byte boundary. */
1148                 rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16);
1149                 /* Rx descriptor address set */
1150                 if (i == 0) {
1151                         sh_eth_write(ndev, mdp->rx_desc_dma, RDLAR);
1152                         if (sh_eth_is_gether(mdp) ||
1153                             sh_eth_is_rz_fast_ether(mdp))
1154                                 sh_eth_write(ndev, mdp->rx_desc_dma, RDFAR);
1155                 }
1156         }
1157 
1158         mdp->dirty_rx = (u32) (i - mdp->num_rx_ring);
1159 
1160         /* Mark the last entry as wrapping the ring. */
1161         rxdesc->status |= cpu_to_edmac(mdp, RD_RDEL);
1162 
1163         memset(mdp->tx_ring, 0, tx_ringsize);
1164 
1165         /* build Tx ring buffer */
1166         for (i = 0; i < mdp->num_tx_ring; i++) {
1167                 mdp->tx_skbuff[i] = NULL;
1168                 txdesc = &mdp->tx_ring[i];
1169                 txdesc->status = cpu_to_edmac(mdp, TD_TFP);
1170                 txdesc->buffer_length = 0;
1171                 if (i == 0) {
1172                         /* Tx descriptor address set */
1173                         sh_eth_write(ndev, mdp->tx_desc_dma, TDLAR);
1174                         if (sh_eth_is_gether(mdp) ||
1175                             sh_eth_is_rz_fast_ether(mdp))
1176                                 sh_eth_write(ndev, mdp->tx_desc_dma, TDFAR);
1177                 }
1178         }
1179 
1180         txdesc->status |= cpu_to_edmac(mdp, TD_TDLE);
1181 }
1182 
1183 /* Get skb and descriptor buffer */
1184 static int sh_eth_ring_init(struct net_device *ndev)
1185 {
1186         struct sh_eth_private *mdp = netdev_priv(ndev);
1187         int rx_ringsize, tx_ringsize, ret = 0;
1188 
1189         /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
1190          * card needs room to do 8 byte alignment, +2 so we can reserve
1191          * the first 2 bytes, and +16 gets room for the status word from the
1192          * card.
1193          */
1194         mdp->rx_buf_sz = (ndev->mtu <= 1492 ? PKT_BUF_SZ :
1195                           (((ndev->mtu + 26 + 7) & ~7) + 2 + 16));
1196         if (mdp->cd->rpadir)
1197                 mdp->rx_buf_sz += NET_IP_ALIGN;
1198 
1199         /* Allocate RX and TX skb rings */
1200         mdp->rx_skbuff = kmalloc_array(mdp->num_rx_ring,
1201                                        sizeof(*mdp->rx_skbuff), GFP_KERNEL);
1202         if (!mdp->rx_skbuff) {
1203                 ret = -ENOMEM;
1204                 return ret;
1205         }
1206 
1207         mdp->tx_skbuff = kmalloc_array(mdp->num_tx_ring,
1208                                        sizeof(*mdp->tx_skbuff), GFP_KERNEL);
1209         if (!mdp->tx_skbuff) {
1210                 ret = -ENOMEM;
1211                 goto skb_ring_free;
1212         }
1213 
1214         /* Allocate all Rx descriptors. */
1215         rx_ringsize = sizeof(struct sh_eth_rxdesc) * mdp->num_rx_ring;
1216         mdp->rx_ring = dma_alloc_coherent(NULL, rx_ringsize, &mdp->rx_desc_dma,
1217                                           GFP_KERNEL);
1218         if (!mdp->rx_ring) {
1219                 ret = -ENOMEM;
1220                 goto desc_ring_free;
1221         }
1222 
1223         mdp->dirty_rx = 0;
1224 
1225         /* Allocate all Tx descriptors. */
1226         tx_ringsize = sizeof(struct sh_eth_txdesc) * mdp->num_tx_ring;
1227         mdp->tx_ring = dma_alloc_coherent(NULL, tx_ringsize, &mdp->tx_desc_dma,
1228                                           GFP_KERNEL);
1229         if (!mdp->tx_ring) {
1230                 ret = -ENOMEM;
1231                 goto desc_ring_free;
1232         }
1233         return ret;
1234 
1235 desc_ring_free:
1236         /* free DMA buffer */
1237         dma_free_coherent(NULL, rx_ringsize, mdp->rx_ring, mdp->rx_desc_dma);
1238 
1239 skb_ring_free:
1240         /* Free Rx and Tx skb ring buffer */
1241         sh_eth_ring_free(ndev);
1242         mdp->tx_ring = NULL;
1243         mdp->rx_ring = NULL;
1244 
1245         return ret;
1246 }
1247 
1248 static void sh_eth_free_dma_buffer(struct sh_eth_private *mdp)
1249 {
1250         int ringsize;
1251 
1252         if (mdp->rx_ring) {
1253                 ringsize = sizeof(struct sh_eth_rxdesc) * mdp->num_rx_ring;
1254                 dma_free_coherent(NULL, ringsize, mdp->rx_ring,
1255                                   mdp->rx_desc_dma);
1256                 mdp->rx_ring = NULL;
1257         }
1258 
1259         if (mdp->tx_ring) {
1260                 ringsize = sizeof(struct sh_eth_txdesc) * mdp->num_tx_ring;
1261                 dma_free_coherent(NULL, ringsize, mdp->tx_ring,
1262                                   mdp->tx_desc_dma);
1263                 mdp->tx_ring = NULL;
1264         }
1265 }
1266 
1267 static int sh_eth_dev_init(struct net_device *ndev, bool start)
1268 {
1269         int ret = 0;
1270         struct sh_eth_private *mdp = netdev_priv(ndev);
1271         u32 val;
1272 
1273         /* Soft Reset */
1274         ret = sh_eth_reset(ndev);
1275         if (ret)
1276                 return ret;
1277 
1278         if (mdp->cd->rmiimode)
1279                 sh_eth_write(ndev, 0x1, RMIIMODE);
1280 
1281         /* Descriptor format */
1282         sh_eth_ring_format(ndev);
1283         if (mdp->cd->rpadir)
1284                 sh_eth_write(ndev, mdp->cd->rpadir_value, RPADIR);
1285 
1286         /* all sh_eth int mask */
1287         sh_eth_write(ndev, 0, EESIPR);
1288 
1289 #if defined(__LITTLE_ENDIAN)
1290         if (mdp->cd->hw_swap)
1291                 sh_eth_write(ndev, EDMR_EL, EDMR);
1292         else
1293 #endif
1294                 sh_eth_write(ndev, 0, EDMR);
1295 
1296         /* FIFO size set */
1297         sh_eth_write(ndev, mdp->cd->fdr_value, FDR);
1298         sh_eth_write(ndev, 0, TFTR);
1299 
1300         /* Frame recv control (enable multiple-packets per rx irq) */
1301         sh_eth_write(ndev, RMCR_RNC, RMCR);
1302 
1303         sh_eth_write(ndev, DESC_I_RINT8 | DESC_I_RINT5 | DESC_I_TINT2, TRSCER);
1304 
1305         if (mdp->cd->bculr)
1306                 sh_eth_write(ndev, 0x800, BCULR);       /* Burst sycle set */
1307 
1308         sh_eth_write(ndev, mdp->cd->fcftr_value, FCFTR);
1309 
1310         if (!mdp->cd->no_trimd)
1311                 sh_eth_write(ndev, 0, TRIMD);
1312 
1313         /* Recv frame limit set register */
1314         sh_eth_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN,
1315                      RFLR);
1316 
1317         sh_eth_write(ndev, sh_eth_read(ndev, EESR), EESR);
1318         if (start)
1319                 sh_eth_write(ndev, mdp->cd->eesipr_value, EESIPR);
1320 
1321         /* PAUSE Prohibition */
1322         val = (sh_eth_read(ndev, ECMR) & ECMR_DM) |
1323                 ECMR_ZPF | (mdp->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE;
1324 
1325         sh_eth_write(ndev, val, ECMR);
1326 
1327         if (mdp->cd->set_rate)
1328                 mdp->cd->set_rate(ndev);
1329 
1330         /* E-MAC Status Register clear */
1331         sh_eth_write(ndev, mdp->cd->ecsr_value, ECSR);
1332 
1333         /* E-MAC Interrupt Enable register */
1334         if (start)
1335                 sh_eth_write(ndev, mdp->cd->ecsipr_value, ECSIPR);
1336 
1337         /* Set MAC address */
1338         update_mac_address(ndev);
1339 
1340         /* mask reset */
1341         if (mdp->cd->apr)
1342                 sh_eth_write(ndev, APR_AP, APR);
1343         if (mdp->cd->mpr)
1344                 sh_eth_write(ndev, MPR_MP, MPR);
1345         if (mdp->cd->tpauser)
1346                 sh_eth_write(ndev, TPAUSER_UNLIMITED, TPAUSER);
1347 
1348         if (start) {
1349                 /* Setting the Rx mode will start the Rx process. */
1350                 sh_eth_write(ndev, EDRRR_R, EDRRR);
1351 
1352                 netif_start_queue(ndev);
1353         }
1354 
1355         return ret;
1356 }
1357 
1358 /* free Tx skb function */
1359 static int sh_eth_txfree(struct net_device *ndev)
1360 {
1361         struct sh_eth_private *mdp = netdev_priv(ndev);
1362         struct sh_eth_txdesc *txdesc;
1363         int free_num = 0;
1364         int entry = 0;
1365 
1366         for (; mdp->cur_tx - mdp->dirty_tx > 0; mdp->dirty_tx++) {
1367                 entry = mdp->dirty_tx % mdp->num_tx_ring;
1368                 txdesc = &mdp->tx_ring[entry];
1369                 if (txdesc->status & cpu_to_edmac(mdp, TD_TACT))
1370                         break;
1371                 /* Free the original skb. */
1372                 if (mdp->tx_skbuff[entry]) {
1373                         dma_unmap_single(&ndev->dev, txdesc->addr,
1374                                          txdesc->buffer_length, DMA_TO_DEVICE);
1375                         dev_kfree_skb_irq(mdp->tx_skbuff[entry]);
1376                         mdp->tx_skbuff[entry] = NULL;
1377                         free_num++;
1378                 }
1379                 txdesc->status = cpu_to_edmac(mdp, TD_TFP);
1380                 if (entry >= mdp->num_tx_ring - 1)
1381                         txdesc->status |= cpu_to_edmac(mdp, TD_TDLE);
1382 
1383                 ndev->stats.tx_packets++;
1384                 ndev->stats.tx_bytes += txdesc->buffer_length;
1385         }
1386         return free_num;
1387 }
1388 
1389 /* Packet receive function */
1390 static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
1391 {
1392         struct sh_eth_private *mdp = netdev_priv(ndev);
1393         struct sh_eth_rxdesc *rxdesc;
1394 
1395         int entry = mdp->cur_rx % mdp->num_rx_ring;
1396         int boguscnt = (mdp->dirty_rx + mdp->num_rx_ring) - mdp->cur_rx;
1397         struct sk_buff *skb;
1398         u16 pkt_len = 0;
1399         u32 desc_status;
1400 
1401         rxdesc = &mdp->rx_ring[entry];
1402         while (!(rxdesc->status & cpu_to_edmac(mdp, RD_RACT))) {
1403                 desc_status = edmac_to_cpu(mdp, rxdesc->status);
1404                 pkt_len = rxdesc->frame_length;
1405 
1406                 if (--boguscnt < 0)
1407                         break;
1408 
1409                 if (*quota <= 0)
1410                         break;
1411 
1412                 (*quota)--;
1413 
1414                 if (!(desc_status & RDFEND))
1415                         ndev->stats.rx_length_errors++;
1416 
1417                 /* In case of almost all GETHER/ETHERs, the Receive Frame State
1418                  * (RFS) bits in the Receive Descriptor 0 are from bit 9 to
1419                  * bit 0. However, in case of the R8A7740, R8A779x, and
1420                  * R7S72100 the RFS bits are from bit 25 to bit 16. So, the
1421                  * driver needs right shifting by 16.
1422                  */
1423                 if (mdp->cd->shift_rd0)
1424                         desc_status >>= 16;
1425 
1426                 if (desc_status & (RD_RFS1 | RD_RFS2 | RD_RFS3 | RD_RFS4 |
1427                                    RD_RFS5 | RD_RFS6 | RD_RFS10)) {
1428                         ndev->stats.rx_errors++;
1429                         if (desc_status & RD_RFS1)
1430                                 ndev->stats.rx_crc_errors++;
1431                         if (desc_status & RD_RFS2)
1432                                 ndev->stats.rx_frame_errors++;
1433                         if (desc_status & RD_RFS3)
1434                                 ndev->stats.rx_length_errors++;
1435                         if (desc_status & RD_RFS4)
1436                                 ndev->stats.rx_length_errors++;
1437                         if (desc_status & RD_RFS6)
1438                                 ndev->stats.rx_missed_errors++;
1439                         if (desc_status & RD_RFS10)
1440                                 ndev->stats.rx_over_errors++;
1441                 } else {
1442                         if (!mdp->cd->hw_swap)
1443                                 sh_eth_soft_swap(
1444                                         phys_to_virt(ALIGN(rxdesc->addr, 4)),
1445                                         pkt_len + 2);
1446                         skb = mdp->rx_skbuff[entry];
1447                         mdp->rx_skbuff[entry] = NULL;
1448                         if (mdp->cd->rpadir)
1449                                 skb_reserve(skb, NET_IP_ALIGN);
1450                         dma_sync_single_for_cpu(&ndev->dev, rxdesc->addr,
1451                                                 mdp->rx_buf_sz,
1452                                                 DMA_FROM_DEVICE);
1453                         skb_put(skb, pkt_len);
1454                         skb->protocol = eth_type_trans(skb, ndev);
1455                         netif_receive_skb(skb);
1456                         ndev->stats.rx_packets++;
1457                         ndev->stats.rx_bytes += pkt_len;
1458                 }
1459                 entry = (++mdp->cur_rx) % mdp->num_rx_ring;
1460                 rxdesc = &mdp->rx_ring[entry];
1461         }
1462 
1463         /* Refill the Rx ring buffers. */
1464         for (; mdp->cur_rx - mdp->dirty_rx > 0; mdp->dirty_rx++) {
1465                 entry = mdp->dirty_rx % mdp->num_rx_ring;
1466                 rxdesc = &mdp->rx_ring[entry];
1467                 /* The size of the buffer is 16 byte boundary. */
1468                 rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16);
1469 
1470                 if (mdp->rx_skbuff[entry] == NULL) {
1471                         skb = netdev_alloc_skb(ndev, mdp->rx_buf_sz);
1472                         mdp->rx_skbuff[entry] = skb;
1473                         if (skb == NULL)
1474                                 break;  /* Better luck next round. */
1475                         dma_map_single(&ndev->dev, skb->data, mdp->rx_buf_sz,
1476                                        DMA_FROM_DEVICE);
1477                         sh_eth_set_receive_align(skb);
1478 
1479                         skb_checksum_none_assert(skb);
1480                         rxdesc->addr = virt_to_phys(PTR_ALIGN(skb->data, 4));
1481                 }
1482                 if (entry >= mdp->num_rx_ring - 1)
1483                         rxdesc->status |=
1484                                 cpu_to_edmac(mdp, RD_RACT | RD_RFP | RD_RDEL);
1485                 else
1486                         rxdesc->status |=
1487                                 cpu_to_edmac(mdp, RD_RACT | RD_RFP);
1488         }
1489 
1490         /* Restart Rx engine if stopped. */
1491         /* If we don't need to check status, don't. -KDU */
1492         if (!(sh_eth_read(ndev, EDRRR) & EDRRR_R)) {
1493                 /* fix the values for the next receiving if RDE is set */
1494                 if (intr_status & EESR_RDE) {
1495                         u32 count = (sh_eth_read(ndev, RDFAR) -
1496                                      sh_eth_read(ndev, RDLAR)) >> 4;
1497 
1498                         mdp->cur_rx = count;
1499                         mdp->dirty_rx = count;
1500                 }
1501                 sh_eth_write(ndev, EDRRR_R, EDRRR);
1502         }
1503 
1504         return *quota <= 0;
1505 }
1506 
1507 static void sh_eth_rcv_snd_disable(struct net_device *ndev)
1508 {
1509         /* disable tx and rx */
1510         sh_eth_write(ndev, sh_eth_read(ndev, ECMR) &
1511                 ~(ECMR_RE | ECMR_TE), ECMR);
1512 }
1513 
1514 static void sh_eth_rcv_snd_enable(struct net_device *ndev)
1515 {
1516         /* enable tx and rx */
1517         sh_eth_write(ndev, sh_eth_read(ndev, ECMR) |
1518                 (ECMR_RE | ECMR_TE), ECMR);
1519 }
1520 
1521 /* error control function */
1522 static void sh_eth_error(struct net_device *ndev, int intr_status)
1523 {
1524         struct sh_eth_private *mdp = netdev_priv(ndev);
1525         u32 felic_stat;
1526         u32 link_stat;
1527         u32 mask;
1528 
1529         if (intr_status & EESR_ECI) {
1530                 felic_stat = sh_eth_read(ndev, ECSR);
1531                 sh_eth_write(ndev, felic_stat, ECSR);   /* clear int */
1532                 if (felic_stat & ECSR_ICD)
1533                         ndev->stats.tx_carrier_errors++;
1534                 if (felic_stat & ECSR_LCHNG) {
1535                         /* Link Changed */
1536                         if (mdp->cd->no_psr || mdp->no_ether_link) {
1537                                 goto ignore_link;
1538                         } else {
1539                                 link_stat = (sh_eth_read(ndev, PSR));
1540                                 if (mdp->ether_link_active_low)
1541                                         link_stat = ~link_stat;
1542                         }
1543                         if (!(link_stat & PHY_ST_LINK)) {
1544                                 sh_eth_rcv_snd_disable(ndev);
1545                         } else {
1546                                 /* Link Up */
1547                                 sh_eth_write(ndev, sh_eth_read(ndev, EESIPR) &
1548                                                    ~DMAC_M_ECI, EESIPR);
1549                                 /* clear int */
1550                                 sh_eth_write(ndev, sh_eth_read(ndev, ECSR),
1551                                              ECSR);
1552                                 sh_eth_write(ndev, sh_eth_read(ndev, EESIPR) |
1553                                                    DMAC_M_ECI, EESIPR);
1554                                 /* enable tx and rx */
1555                                 sh_eth_rcv_snd_enable(ndev);
1556                         }
1557                 }
1558         }
1559 
1560 ignore_link:
1561         if (intr_status & EESR_TWB) {
1562                 /* Unused write back interrupt */
1563                 if (intr_status & EESR_TABT) {  /* Transmit Abort int */
1564                         ndev->stats.tx_aborted_errors++;
1565                         netif_err(mdp, tx_err, ndev, "Transmit Abort\n");
1566                 }
1567         }
1568 
1569         if (intr_status & EESR_RABT) {
1570                 /* Receive Abort int */
1571                 if (intr_status & EESR_RFRMER) {
1572                         /* Receive Frame Overflow int */
1573                         ndev->stats.rx_frame_errors++;
1574                         netif_err(mdp, rx_err, ndev, "Receive Abort\n");
1575                 }
1576         }
1577 
1578         if (intr_status & EESR_TDE) {
1579                 /* Transmit Descriptor Empty int */
1580                 ndev->stats.tx_fifo_errors++;
1581                 netif_err(mdp, tx_err, ndev, "Transmit Descriptor Empty\n");
1582         }
1583 
1584         if (intr_status & EESR_TFE) {
1585                 /* FIFO under flow */
1586                 ndev->stats.tx_fifo_errors++;
1587                 netif_err(mdp, tx_err, ndev, "Transmit FIFO Under flow\n");
1588         }
1589 
1590         if (intr_status & EESR_RDE) {
1591                 /* Receive Descriptor Empty int */
1592                 ndev->stats.rx_over_errors++;
1593                 netif_err(mdp, rx_err, ndev, "Receive Descriptor Empty\n");
1594         }
1595 
1596         if (intr_status & EESR_RFE) {
1597                 /* Receive FIFO Overflow int */
1598                 ndev->stats.rx_fifo_errors++;
1599                 netif_err(mdp, rx_err, ndev, "Receive FIFO Overflow\n");
1600         }
1601 
1602         if (!mdp->cd->no_ade && (intr_status & EESR_ADE)) {
1603                 /* Address Error */
1604                 ndev->stats.tx_fifo_errors++;
1605                 netif_err(mdp, tx_err, ndev, "Address Error\n");
1606         }
1607 
1608         mask = EESR_TWB | EESR_TABT | EESR_ADE | EESR_TDE | EESR_TFE;
1609         if (mdp->cd->no_ade)
1610                 mask &= ~EESR_ADE;
1611         if (intr_status & mask) {
1612                 /* Tx error */
1613                 u32 edtrr = sh_eth_read(ndev, EDTRR);
1614 
1615                 /* dmesg */
1616                 netdev_err(ndev, "TX error. status=%8.8x cur_tx=%8.8x dirty_tx=%8.8x state=%8.8x EDTRR=%8.8x.\n",
1617                            intr_status, mdp->cur_tx, mdp->dirty_tx,
1618                            (u32)ndev->state, edtrr);
1619                 /* dirty buffer free */
1620                 sh_eth_txfree(ndev);
1621 
1622                 /* SH7712 BUG */
1623                 if (edtrr ^ sh_eth_get_edtrr_trns(mdp)) {
1624                         /* tx dma start */
1625                         sh_eth_write(ndev, sh_eth_get_edtrr_trns(mdp), EDTRR);
1626                 }
1627                 /* wakeup */
1628                 netif_wake_queue(ndev);
1629         }
1630 }
1631 
1632 static irqreturn_t sh_eth_interrupt(int irq, void *netdev)
1633 {
1634         struct net_device *ndev = netdev;
1635         struct sh_eth_private *mdp = netdev_priv(ndev);
1636         struct sh_eth_cpu_data *cd = mdp->cd;
1637         irqreturn_t ret = IRQ_NONE;
1638         unsigned long intr_status, intr_enable;
1639 
1640         spin_lock(&mdp->lock);
1641 
1642         /* Get interrupt status */
1643         intr_status = sh_eth_read(ndev, EESR);
1644         /* Mask it with the interrupt mask, forcing ECI interrupt to be always
1645          * enabled since it's the one that  comes thru regardless of the mask,
1646          * and we need to fully handle it in sh_eth_error() in order to quench
1647          * it as it doesn't get cleared by just writing 1 to the ECI bit...
1648          */
1649         intr_enable = sh_eth_read(ndev, EESIPR);
1650         intr_status &= intr_enable | DMAC_M_ECI;
1651         if (intr_status & (EESR_RX_CHECK | cd->tx_check | cd->eesr_err_check))
1652                 ret = IRQ_HANDLED;
1653         else
1654                 goto other_irq;
1655 
1656         if (intr_status & EESR_RX_CHECK) {
1657                 if (napi_schedule_prep(&mdp->napi)) {
1658                         /* Mask Rx interrupts */
1659                         sh_eth_write(ndev, intr_enable & ~EESR_RX_CHECK,
1660                                      EESIPR);
1661                         __napi_schedule(&mdp->napi);
1662                 } else {
1663                         netdev_warn(ndev,
1664                                     "ignoring interrupt, status 0x%08lx, mask 0x%08lx.\n",
1665                                     intr_status, intr_enable);
1666                 }
1667         }
1668 
1669         /* Tx Check */
1670         if (intr_status & cd->tx_check) {
1671                 /* Clear Tx interrupts */
1672                 sh_eth_write(ndev, intr_status & cd->tx_check, EESR);
1673 
1674                 sh_eth_txfree(ndev);
1675                 netif_wake_queue(ndev);
1676         }
1677 
1678         if (intr_status & cd->eesr_err_check) {
1679                 /* Clear error interrupts */
1680                 sh_eth_write(ndev, intr_status & cd->eesr_err_check, EESR);
1681 
1682                 sh_eth_error(ndev, intr_status);
1683         }
1684 
1685 other_irq:
1686         spin_unlock(&mdp->lock);
1687 
1688         return ret;
1689 }
1690 
1691 static int sh_eth_poll(struct napi_struct *napi, int budget)
1692 {
1693         struct sh_eth_private *mdp = container_of(napi, struct sh_eth_private,
1694                                                   napi);
1695         struct net_device *ndev = napi->dev;
1696         int quota = budget;
1697         unsigned long intr_status;
1698 
1699         for (;;) {
1700                 intr_status = sh_eth_read(ndev, EESR);
1701                 if (!(intr_status & EESR_RX_CHECK))
1702                         break;
1703                 /* Clear Rx interrupts */
1704                 sh_eth_write(ndev, intr_status & EESR_RX_CHECK, EESR);
1705 
1706                 if (sh_eth_rx(ndev, intr_status, &quota))
1707                         goto out;
1708         }
1709 
1710         napi_complete(napi);
1711 
1712         /* Reenable Rx interrupts */
1713         sh_eth_write(ndev, mdp->cd->eesipr_value, EESIPR);
1714 out:
1715         return budget - quota;
1716 }
1717 
1718 /* PHY state control function */
1719 static void sh_eth_adjust_link(struct net_device *ndev)
1720 {
1721         struct sh_eth_private *mdp = netdev_priv(ndev);
1722         struct phy_device *phydev = mdp->phydev;
1723         int new_state = 0;
1724 
1725         if (phydev->link) {
1726                 if (phydev->duplex != mdp->duplex) {
1727                         new_state = 1;
1728                         mdp->duplex = phydev->duplex;
1729                         if (mdp->cd->set_duplex)
1730                                 mdp->cd->set_duplex(ndev);
1731                 }
1732 
1733                 if (phydev->speed != mdp->speed) {
1734                         new_state = 1;
1735                         mdp->speed = phydev->speed;
1736                         if (mdp->cd->set_rate)
1737                                 mdp->cd->set_rate(ndev);
1738                 }
1739                 if (!mdp->link) {
1740                         sh_eth_write(ndev,
1741                                      sh_eth_read(ndev, ECMR) & ~ECMR_TXF,
1742                                      ECMR);
1743                         new_state = 1;
1744                         mdp->link = phydev->link;
1745                         if (mdp->cd->no_psr || mdp->no_ether_link)
1746                                 sh_eth_rcv_snd_enable(ndev);
1747                 }
1748         } else if (mdp->link) {
1749                 new_state = 1;
1750                 mdp->link = 0;
1751                 mdp->speed = 0;
1752                 mdp->duplex = -1;
1753                 if (mdp->cd->no_psr || mdp->no_ether_link)
1754                         sh_eth_rcv_snd_disable(ndev);
1755         }
1756 
1757         if (new_state && netif_msg_link(mdp))
1758                 phy_print_status(phydev);
1759 }
1760 
1761 /* PHY init function */
1762 static int sh_eth_phy_init(struct net_device *ndev)
1763 {
1764         struct device_node *np = ndev->dev.parent->of_node;
1765         struct sh_eth_private *mdp = netdev_priv(ndev);
1766         struct phy_device *phydev = NULL;
1767 
1768         mdp->link = 0;
1769         mdp->speed = 0;
1770         mdp->duplex = -1;
1771 
1772         /* Try connect to PHY */
1773         if (np) {
1774                 struct device_node *pn;
1775 
1776                 pn = of_parse_phandle(np, "phy-handle", 0);
1777                 phydev = of_phy_connect(ndev, pn,
1778                                         sh_eth_adjust_link, 0,
1779                                         mdp->phy_interface);
1780 
1781                 if (!phydev)
1782                         phydev = ERR_PTR(-ENOENT);
1783         } else {
1784                 char phy_id[MII_BUS_ID_SIZE + 3];
1785 
1786                 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
1787                          mdp->mii_bus->id, mdp->phy_id);
1788 
1789                 phydev = phy_connect(ndev, phy_id, sh_eth_adjust_link,
1790                                      mdp->phy_interface);
1791         }
1792 
1793         if (IS_ERR(phydev)) {
1794                 netdev_err(ndev, "failed to connect PHY\n");
1795                 return PTR_ERR(phydev);
1796         }
1797 
1798         netdev_info(ndev, "attached PHY %d (IRQ %d) to driver %s\n",
1799                     phydev->addr, phydev->irq, phydev->drv->name);
1800 
1801         mdp->phydev = phydev;
1802 
1803         return 0;
1804 }
1805 
1806 /* PHY control start function */
1807 static int sh_eth_phy_start(struct net_device *ndev)
1808 {
1809         struct sh_eth_private *mdp = netdev_priv(ndev);
1810         int ret;
1811 
1812         ret = sh_eth_phy_init(ndev);
1813         if (ret)
1814                 return ret;
1815 
1816         phy_start(mdp->phydev);
1817 
1818         return 0;
1819 }
1820 
1821 static int sh_eth_get_settings(struct net_device *ndev,
1822                                struct ethtool_cmd *ecmd)
1823 {
1824         struct sh_eth_private *mdp = netdev_priv(ndev);
1825         unsigned long flags;
1826         int ret;
1827 
1828         spin_lock_irqsave(&mdp->lock, flags);
1829         ret = phy_ethtool_gset(mdp->phydev, ecmd);
1830         spin_unlock_irqrestore(&mdp->lock, flags);
1831 
1832         return ret;
1833 }
1834 
1835 static int sh_eth_set_settings(struct net_device *ndev,
1836                                struct ethtool_cmd *ecmd)
1837 {
1838         struct sh_eth_private *mdp = netdev_priv(ndev);
1839         unsigned long flags;
1840         int ret;
1841 
1842         spin_lock_irqsave(&mdp->lock, flags);
1843 
1844         /* disable tx and rx */
1845         sh_eth_rcv_snd_disable(ndev);
1846 
1847         ret = phy_ethtool_sset(mdp->phydev, ecmd);
1848         if (ret)
1849                 goto error_exit;
1850 
1851         if (ecmd->duplex == DUPLEX_FULL)
1852                 mdp->duplex = 1;
1853         else
1854                 mdp->duplex = 0;
1855 
1856         if (mdp->cd->set_duplex)
1857                 mdp->cd->set_duplex(ndev);
1858 
1859 error_exit:
1860         mdelay(1);
1861 
1862         /* enable tx and rx */
1863         sh_eth_rcv_snd_enable(ndev);
1864 
1865         spin_unlock_irqrestore(&mdp->lock, flags);
1866 
1867         return ret;
1868 }
1869 
1870 static int sh_eth_nway_reset(struct net_device *ndev)
1871 {
1872         struct sh_eth_private *mdp = netdev_priv(ndev);
1873         unsigned long flags;
1874         int ret;
1875 
1876         spin_lock_irqsave(&mdp->lock, flags);
1877         ret = phy_start_aneg(mdp->phydev);
1878         spin_unlock_irqrestore(&mdp->lock, flags);
1879 
1880         return ret;
1881 }
1882 
1883 static u32 sh_eth_get_msglevel(struct net_device *ndev)
1884 {
1885         struct sh_eth_private *mdp = netdev_priv(ndev);
1886         return mdp->msg_enable;
1887 }
1888 
1889 static void sh_eth_set_msglevel(struct net_device *ndev, u32 value)
1890 {
1891         struct sh_eth_private *mdp = netdev_priv(ndev);
1892         mdp->msg_enable = value;
1893 }
1894 
1895 static const char sh_eth_gstrings_stats[][ETH_GSTRING_LEN] = {
1896         "rx_current", "tx_current",
1897         "rx_dirty", "tx_dirty",
1898 };
1899 #define SH_ETH_STATS_LEN  ARRAY_SIZE(sh_eth_gstrings_stats)
1900 
1901 static int sh_eth_get_sset_count(struct net_device *netdev, int sset)
1902 {
1903         switch (sset) {
1904         case ETH_SS_STATS:
1905                 return SH_ETH_STATS_LEN;
1906         default:
1907                 return -EOPNOTSUPP;
1908         }
1909 }
1910 
1911 static void sh_eth_get_ethtool_stats(struct net_device *ndev,
1912                                      struct ethtool_stats *stats, u64 *data)
1913 {
1914         struct sh_eth_private *mdp = netdev_priv(ndev);
1915         int i = 0;
1916 
1917         /* device-specific stats */
1918         data[i++] = mdp->cur_rx;
1919         data[i++] = mdp->cur_tx;
1920         data[i++] = mdp->dirty_rx;
1921         data[i++] = mdp->dirty_tx;
1922 }
1923 
1924 static void sh_eth_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
1925 {
1926         switch (stringset) {
1927         case ETH_SS_STATS:
1928                 memcpy(data, *sh_eth_gstrings_stats,
1929                        sizeof(sh_eth_gstrings_stats));
1930                 break;
1931         }
1932 }
1933 
1934 static void sh_eth_get_ringparam(struct net_device *ndev,
1935                                  struct ethtool_ringparam *ring)
1936 {
1937         struct sh_eth_private *mdp = netdev_priv(ndev);
1938 
1939         ring->rx_max_pending = RX_RING_MAX;
1940         ring->tx_max_pending = TX_RING_MAX;
1941         ring->rx_pending = mdp->num_rx_ring;
1942         ring->tx_pending = mdp->num_tx_ring;
1943 }
1944 
1945 static int sh_eth_set_ringparam(struct net_device *ndev,
1946                                 struct ethtool_ringparam *ring)
1947 {
1948         struct sh_eth_private *mdp = netdev_priv(ndev);
1949         int ret;
1950 
1951         if (ring->tx_pending > TX_RING_MAX ||
1952             ring->rx_pending > RX_RING_MAX ||
1953             ring->tx_pending < TX_RING_MIN ||
1954             ring->rx_pending < RX_RING_MIN)
1955                 return -EINVAL;
1956         if (ring->rx_mini_pending || ring->rx_jumbo_pending)
1957                 return -EINVAL;
1958 
1959         if (netif_running(ndev)) {
1960                 netif_tx_disable(ndev);
1961                 /* Disable interrupts by clearing the interrupt mask. */
1962                 sh_eth_write(ndev, 0x0000, EESIPR);
1963                 /* Stop the chip's Tx and Rx processes. */
1964                 sh_eth_write(ndev, 0, EDTRR);
1965                 sh_eth_write(ndev, 0, EDRRR);
1966                 synchronize_irq(ndev->irq);
1967         }
1968 
1969         /* Free all the skbuffs in the Rx queue. */
1970         sh_eth_ring_free(ndev);
1971         /* Free DMA buffer */
1972         sh_eth_free_dma_buffer(mdp);
1973 
1974         /* Set new parameters */
1975         mdp->num_rx_ring = ring->rx_pending;
1976         mdp->num_tx_ring = ring->tx_pending;
1977 
1978         ret = sh_eth_ring_init(ndev);
1979         if (ret < 0) {
1980                 netdev_err(ndev, "%s: sh_eth_ring_init failed.\n", __func__);
1981                 return ret;
1982         }
1983         ret = sh_eth_dev_init(ndev, false);
1984         if (ret < 0) {
1985                 netdev_err(ndev, "%s: sh_eth_dev_init failed.\n", __func__);
1986                 return ret;
1987         }
1988 
1989         if (netif_running(ndev)) {
1990                 sh_eth_write(ndev, mdp->cd->eesipr_value, EESIPR);
1991                 /* Setting the Rx mode will start the Rx process. */
1992                 sh_eth_write(ndev, EDRRR_R, EDRRR);
1993                 netif_wake_queue(ndev);
1994         }
1995 
1996         return 0;
1997 }
1998 
1999 static const struct ethtool_ops sh_eth_ethtool_ops = {
2000         .get_settings   = sh_eth_get_settings,
2001         .set_settings   = sh_eth_set_settings,
2002         .nway_reset     = sh_eth_nway_reset,
2003         .get_msglevel   = sh_eth_get_msglevel,
2004         .set_msglevel   = sh_eth_set_msglevel,
2005         .get_link       = ethtool_op_get_link,
2006         .get_strings    = sh_eth_get_strings,
2007         .get_ethtool_stats  = sh_eth_get_ethtool_stats,
2008         .get_sset_count     = sh_eth_get_sset_count,
2009         .get_ringparam  = sh_eth_get_ringparam,
2010         .set_ringparam  = sh_eth_set_ringparam,
2011 };
2012 
2013 /* network device open function */
2014 static int sh_eth_open(struct net_device *ndev)
2015 {
2016         int ret = 0;
2017         struct sh_eth_private *mdp = netdev_priv(ndev);
2018 
2019         pm_runtime_get_sync(&mdp->pdev->dev);
2020 
2021         napi_enable(&mdp->napi);
2022 
2023         ret = request_irq(ndev->irq, sh_eth_interrupt,
2024                           mdp->cd->irq_flags, ndev->name, ndev);
2025         if (ret) {
2026                 netdev_err(ndev, "Can not assign IRQ number\n");
2027                 goto out_napi_off;
2028         }
2029 
2030         /* Descriptor set */
2031         ret = sh_eth_ring_init(ndev);
2032         if (ret)
2033                 goto out_free_irq;
2034 
2035         /* device init */
2036         ret = sh_eth_dev_init(ndev, true);
2037         if (ret)
2038                 goto out_free_irq;
2039 
2040         /* PHY control start*/
2041         ret = sh_eth_phy_start(ndev);
2042         if (ret)
2043                 goto out_free_irq;
2044 
2045         return ret;
2046 
2047 out_free_irq:
2048         free_irq(ndev->irq, ndev);
2049 out_napi_off:
2050         napi_disable(&mdp->napi);
2051         pm_runtime_put_sync(&mdp->pdev->dev);
2052         return ret;
2053 }
2054 
2055 /* Timeout function */
2056 static void sh_eth_tx_timeout(struct net_device *ndev)
2057 {
2058         struct sh_eth_private *mdp = netdev_priv(ndev);
2059         struct sh_eth_rxdesc *rxdesc;
2060         int i;
2061 
2062         netif_stop_queue(ndev);
2063 
2064         netif_err(mdp, timer, ndev,
2065                   "transmit timed out, status %8.8x, resetting...\n",
2066                   (int)sh_eth_read(ndev, EESR));
2067 
2068         /* tx_errors count up */
2069         ndev->stats.tx_errors++;
2070 
2071         /* Free all the skbuffs in the Rx queue. */
2072         for (i = 0; i < mdp->num_rx_ring; i++) {
2073                 rxdesc = &mdp->rx_ring[i];
2074                 rxdesc->status = 0;
2075                 rxdesc->addr = 0xBADF00D0;
2076                 dev_kfree_skb(mdp->rx_skbuff[i]);
2077                 mdp->rx_skbuff[i] = NULL;
2078         }
2079         for (i = 0; i < mdp->num_tx_ring; i++) {
2080                 dev_kfree_skb(mdp->tx_skbuff[i]);
2081                 mdp->tx_skbuff[i] = NULL;
2082         }
2083 
2084         /* device init */
2085         sh_eth_dev_init(ndev, true);
2086 }
2087 
2088 /* Packet transmit function */
2089 static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev)
2090 {
2091         struct sh_eth_private *mdp = netdev_priv(ndev);
2092         struct sh_eth_txdesc *txdesc;
2093         u32 entry;
2094         unsigned long flags;
2095 
2096         spin_lock_irqsave(&mdp->lock, flags);
2097         if ((mdp->cur_tx - mdp->dirty_tx) >= (mdp->num_tx_ring - 4)) {
2098                 if (!sh_eth_txfree(ndev)) {
2099                         netif_warn(mdp, tx_queued, ndev, "TxFD exhausted.\n");
2100                         netif_stop_queue(ndev);
2101                         spin_unlock_irqrestore(&mdp->lock, flags);
2102                         return NETDEV_TX_BUSY;
2103                 }
2104         }
2105         spin_unlock_irqrestore(&mdp->lock, flags);
2106 
2107         entry = mdp->cur_tx % mdp->num_tx_ring;
2108         mdp->tx_skbuff[entry] = skb;
2109         txdesc = &mdp->tx_ring[entry];
2110         /* soft swap. */
2111         if (!mdp->cd->hw_swap)
2112                 sh_eth_soft_swap(phys_to_virt(ALIGN(txdesc->addr, 4)),
2113                                  skb->len + 2);
2114         txdesc->addr = dma_map_single(&ndev->dev, skb->data, skb->len,
2115                                       DMA_TO_DEVICE);
2116         if (skb->len < ETH_ZLEN)
2117                 txdesc->buffer_length = ETH_ZLEN;
2118         else
2119                 txdesc->buffer_length = skb->len;
2120 
2121         if (entry >= mdp->num_tx_ring - 1)
2122                 txdesc->status |= cpu_to_edmac(mdp, TD_TACT | TD_TDLE);
2123         else
2124                 txdesc->status |= cpu_to_edmac(mdp, TD_TACT);
2125 
2126         mdp->cur_tx++;
2127 
2128         if (!(sh_eth_read(ndev, EDTRR) & sh_eth_get_edtrr_trns(mdp)))
2129                 sh_eth_write(ndev, sh_eth_get_edtrr_trns(mdp), EDTRR);
2130 
2131         return NETDEV_TX_OK;
2132 }
2133 
2134 /* device close function */
2135 static int sh_eth_close(struct net_device *ndev)
2136 {
2137         struct sh_eth_private *mdp = netdev_priv(ndev);
2138 
2139         netif_stop_queue(ndev);
2140 
2141         /* Disable interrupts by clearing the interrupt mask. */
2142         sh_eth_write(ndev, 0x0000, EESIPR);
2143 
2144         /* Stop the chip's Tx and Rx processes. */
2145         sh_eth_write(ndev, 0, EDTRR);
2146         sh_eth_write(ndev, 0, EDRRR);
2147 
2148         /* PHY Disconnect */
2149         if (mdp->phydev) {
2150                 phy_stop(mdp->phydev);
2151                 phy_disconnect(mdp->phydev);
2152         }
2153 
2154         free_irq(ndev->irq, ndev);
2155 
2156         napi_disable(&mdp->napi);
2157 
2158         /* Free all the skbuffs in the Rx queue. */
2159         sh_eth_ring_free(ndev);
2160 
2161         /* free DMA buffer */
2162         sh_eth_free_dma_buffer(mdp);
2163 
2164         pm_runtime_put_sync(&mdp->pdev->dev);
2165 
2166         return 0;
2167 }
2168 
2169 static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev)
2170 {
2171         struct sh_eth_private *mdp = netdev_priv(ndev);
2172 
2173         if (sh_eth_is_rz_fast_ether(mdp))
2174                 return &ndev->stats;
2175 
2176         pm_runtime_get_sync(&mdp->pdev->dev);
2177 
2178         ndev->stats.tx_dropped += sh_eth_read(ndev, TROCR);
2179         sh_eth_write(ndev, 0, TROCR);   /* (write clear) */
2180         ndev->stats.collisions += sh_eth_read(ndev, CDCR);
2181         sh_eth_write(ndev, 0, CDCR);    /* (write clear) */
2182         ndev->stats.tx_carrier_errors += sh_eth_read(ndev, LCCR);
2183         sh_eth_write(ndev, 0, LCCR);    /* (write clear) */
2184         if (sh_eth_is_gether(mdp)) {
2185                 ndev->stats.tx_carrier_errors += sh_eth_read(ndev, CERCR);
2186                 sh_eth_write(ndev, 0, CERCR);   /* (write clear) */
2187                 ndev->stats.tx_carrier_errors += sh_eth_read(ndev, CEECR);
2188                 sh_eth_write(ndev, 0, CEECR);   /* (write clear) */
2189         } else {
2190                 ndev->stats.tx_carrier_errors += sh_eth_read(ndev, CNDCR);
2191                 sh_eth_write(ndev, 0, CNDCR);   /* (write clear) */
2192         }
2193         pm_runtime_put_sync(&mdp->pdev->dev);
2194 
2195         return &ndev->stats;
2196 }
2197 
2198 /* ioctl to device function */
2199 static int sh_eth_do_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
2200 {
2201         struct sh_eth_private *mdp = netdev_priv(ndev);
2202         struct phy_device *phydev = mdp->phydev;
2203 
2204         if (!netif_running(ndev))
2205                 return -EINVAL;
2206 
2207         if (!phydev)
2208                 return -ENODEV;
2209 
2210         return phy_mii_ioctl(phydev, rq, cmd);
2211 }
2212 
2213 /* For TSU_POSTn. Please refer to the manual about this (strange) bitfields */
2214 static void *sh_eth_tsu_get_post_reg_offset(struct sh_eth_private *mdp,
2215                                             int entry)
2216 {
2217         return sh_eth_tsu_get_offset(mdp, TSU_POST1) + (entry / 8 * 4);
2218 }
2219 
2220 static u32 sh_eth_tsu_get_post_mask(int entry)
2221 {
2222         return 0x0f << (28 - ((entry % 8) * 4));
2223 }
2224 
2225 static u32 sh_eth_tsu_get_post_bit(struct sh_eth_private *mdp, int entry)
2226 {
2227         return (0x08 >> (mdp->port << 1)) << (28 - ((entry % 8) * 4));
2228 }
2229 
2230 static void sh_eth_tsu_enable_cam_entry_post(struct net_device *ndev,
2231                                              int entry)
2232 {
2233         struct sh_eth_private *mdp = netdev_priv(ndev);
2234         u32 tmp;
2235         void *reg_offset;
2236 
2237         reg_offset = sh_eth_tsu_get_post_reg_offset(mdp, entry);
2238         tmp = ioread32(reg_offset);
2239         iowrite32(tmp | sh_eth_tsu_get_post_bit(mdp, entry), reg_offset);
2240 }
2241 
2242 static bool sh_eth_tsu_disable_cam_entry_post(struct net_device *ndev,
2243                                               int entry)
2244 {
2245         struct sh_eth_private *mdp = netdev_priv(ndev);
2246         u32 post_mask, ref_mask, tmp;
2247         void *reg_offset;
2248 
2249         reg_offset = sh_eth_tsu_get_post_reg_offset(mdp, entry);
2250         post_mask = sh_eth_tsu_get_post_mask(entry);
2251         ref_mask = sh_eth_tsu_get_post_bit(mdp, entry) & ~post_mask;
2252 
2253         tmp = ioread32(reg_offset);
2254         iowrite32(tmp & ~post_mask, reg_offset);
2255 
2256         /* If other port enables, the function returns "true" */
2257         return tmp & ref_mask;
2258 }
2259 
2260 static int sh_eth_tsu_busy(struct net_device *ndev)
2261 {
2262         int timeout = SH_ETH_TSU_TIMEOUT_MS * 100;
2263         struct sh_eth_private *mdp = netdev_priv(ndev);
2264 
2265         while ((sh_eth_tsu_read(mdp, TSU_ADSBSY) & TSU_ADSBSY_0)) {
2266                 udelay(10);
2267                 timeout--;
2268                 if (timeout <= 0) {
2269                         netdev_err(ndev, "%s: timeout\n", __func__);
2270                         return -ETIMEDOUT;
2271                 }
2272         }
2273 
2274         return 0;
2275 }
2276 
2277 static int sh_eth_tsu_write_entry(struct net_device *ndev, void *reg,
2278                                   const u8 *addr)
2279 {
2280         u32 val;
2281 
2282         val = addr[0] << 24 | addr[1] << 16 | addr[2] << 8 | addr[3];
2283         iowrite32(val, reg);
2284         if (sh_eth_tsu_busy(ndev) < 0)
2285                 return -EBUSY;
2286 
2287         val = addr[4] << 8 | addr[5];
2288         iowrite32(val, reg + 4);
2289         if (sh_eth_tsu_busy(ndev) < 0)
2290                 return -EBUSY;
2291 
2292         return 0;
2293 }
2294 
2295 static void sh_eth_tsu_read_entry(void *reg, u8 *addr)
2296 {
2297         u32 val;
2298 
2299         val = ioread32(reg);
2300         addr[0] = (val >> 24) & 0xff;
2301         addr[1] = (val >> 16) & 0xff;
2302         addr[2] = (val >> 8) & 0xff;
2303         addr[3] = val & 0xff;
2304         val = ioread32(reg + 4);
2305         addr[4] = (val >> 8) & 0xff;
2306         addr[5] = val & 0xff;
2307 }
2308 
2309 
2310 static int sh_eth_tsu_find_entry(struct net_device *ndev, const u8 *addr)
2311 {
2312         struct sh_eth_private *mdp = netdev_priv(ndev);
2313         void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
2314         int i;
2315         u8 c_addr[ETH_ALEN];
2316 
2317         for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++, reg_offset += 8) {
2318                 sh_eth_tsu_read_entry(reg_offset, c_addr);
2319                 if (ether_addr_equal(addr, c_addr))
2320                         return i;
2321         }
2322 
2323         return -ENOENT;
2324 }
2325 
2326 static int sh_eth_tsu_find_empty(struct net_device *ndev)
2327 {
2328         u8 blank[ETH_ALEN];
2329         int entry;
2330 
2331         memset(blank, 0, sizeof(blank));
2332         entry = sh_eth_tsu_find_entry(ndev, blank);
2333         return (entry < 0) ? -ENOMEM : entry;
2334 }
2335 
2336 static int sh_eth_tsu_disable_cam_entry_table(struct net_device *ndev,
2337                                               int entry)
2338 {
2339         struct sh_eth_private *mdp = netdev_priv(ndev);
2340         void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
2341         int ret;
2342         u8 blank[ETH_ALEN];
2343 
2344         sh_eth_tsu_write(mdp, sh_eth_tsu_read(mdp, TSU_TEN) &
2345                          ~(1 << (31 - entry)), TSU_TEN);
2346 
2347         memset(blank, 0, sizeof(blank));
2348         ret = sh_eth_tsu_write_entry(ndev, reg_offset + entry * 8, blank);
2349         if (ret < 0)
2350                 return ret;
2351         return 0;
2352 }
2353 
2354 static int sh_eth_tsu_add_entry(struct net_device *ndev, const u8 *addr)
2355 {
2356         struct sh_eth_private *mdp = netdev_priv(ndev);
2357         void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
2358         int i, ret;
2359 
2360         if (!mdp->cd->tsu)
2361                 return 0;
2362 
2363         i = sh_eth_tsu_find_entry(ndev, addr);
2364         if (i < 0) {
2365                 /* No entry found, create one */
2366                 i = sh_eth_tsu_find_empty(ndev);
2367                 if (i < 0)
2368                         return -ENOMEM;
2369                 ret = sh_eth_tsu_write_entry(ndev, reg_offset + i * 8, addr);
2370                 if (ret < 0)
2371                         return ret;
2372 
2373                 /* Enable the entry */
2374                 sh_eth_tsu_write(mdp, sh_eth_tsu_read(mdp, TSU_TEN) |
2375                                  (1 << (31 - i)), TSU_TEN);
2376         }
2377 
2378         /* Entry found or created, enable POST */
2379         sh_eth_tsu_enable_cam_entry_post(ndev, i);
2380 
2381         return 0;
2382 }
2383 
2384 static int sh_eth_tsu_del_entry(struct net_device *ndev, const u8 *addr)
2385 {
2386         struct sh_eth_private *mdp = netdev_priv(ndev);
2387         int i, ret;
2388 
2389         if (!mdp->cd->tsu)
2390                 return 0;
2391 
2392         i = sh_eth_tsu_find_entry(ndev, addr);
2393         if (i) {
2394                 /* Entry found */
2395                 if (sh_eth_tsu_disable_cam_entry_post(ndev, i))
2396                         goto done;
2397 
2398                 /* Disable the entry if both ports was disabled */
2399                 ret = sh_eth_tsu_disable_cam_entry_table(ndev, i);
2400                 if (ret < 0)
2401                         return ret;
2402         }
2403 done:
2404         return 0;
2405 }
2406 
2407 static int sh_eth_tsu_purge_all(struct net_device *ndev)
2408 {
2409         struct sh_eth_private *mdp = netdev_priv(ndev);
2410         int i, ret;
2411 
2412         if (unlikely(!mdp->cd->tsu))
2413                 return 0;
2414 
2415         for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++) {
2416                 if (sh_eth_tsu_disable_cam_entry_post(ndev, i))
2417                         continue;
2418 
2419                 /* Disable the entry if both ports was disabled */
2420                 ret = sh_eth_tsu_disable_cam_entry_table(ndev, i);
2421                 if (ret < 0)
2422                         return ret;
2423         }
2424 
2425         return 0;
2426 }
2427 
2428 static void sh_eth_tsu_purge_mcast(struct net_device *ndev)
2429 {
2430         struct sh_eth_private *mdp = netdev_priv(ndev);
2431         u8 addr[ETH_ALEN];
2432         void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
2433         int i;
2434 
2435         if (unlikely(!mdp->cd->tsu))
2436                 return;
2437 
2438         for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++, reg_offset += 8) {
2439                 sh_eth_tsu_read_entry(reg_offset, addr);
2440                 if (is_multicast_ether_addr(addr))
2441                         sh_eth_tsu_del_entry(ndev, addr);
2442         }
2443 }
2444 
2445 /* Multicast reception directions set */
2446 static void sh_eth_set_multicast_list(struct net_device *ndev)
2447 {
2448         struct sh_eth_private *mdp = netdev_priv(ndev);
2449         u32 ecmr_bits;
2450         int mcast_all = 0;
2451         unsigned long flags;
2452 
2453         spin_lock_irqsave(&mdp->lock, flags);
2454         /* Initial condition is MCT = 1, PRM = 0.
2455          * Depending on ndev->flags, set PRM or clear MCT
2456          */
2457         ecmr_bits = (sh_eth_read(ndev, ECMR) & ~ECMR_PRM) | ECMR_MCT;
2458 
2459         if (!(ndev->flags & IFF_MULTICAST)) {
2460                 sh_eth_tsu_purge_mcast(ndev);
2461                 mcast_all = 1;
2462         }
2463         if (ndev->flags & IFF_ALLMULTI) {
2464                 sh_eth_tsu_purge_mcast(ndev);
2465                 ecmr_bits &= ~ECMR_MCT;
2466                 mcast_all = 1;
2467         }
2468 
2469         if (ndev->flags & IFF_PROMISC) {
2470                 sh_eth_tsu_purge_all(ndev);
2471                 ecmr_bits = (ecmr_bits & ~ECMR_MCT) | ECMR_PRM;
2472         } else if (mdp->cd->tsu) {
2473                 struct netdev_hw_addr *ha;
2474                 netdev_for_each_mc_addr(ha, ndev) {
2475                         if (mcast_all && is_multicast_ether_addr(ha->addr))
2476                                 continue;
2477 
2478                         if (sh_eth_tsu_add_entry(ndev, ha->addr) < 0) {
2479                                 if (!mcast_all) {
2480                                         sh_eth_tsu_purge_mcast(ndev);
2481                                         ecmr_bits &= ~ECMR_MCT;
2482                                         mcast_all = 1;
2483                                 }
2484                         }
2485                 }
2486         } else {
2487                 /* Normal, unicast/broadcast-only mode. */
2488                 ecmr_bits = (ecmr_bits & ~ECMR_PRM) | ECMR_MCT;
2489         }
2490 
2491         /* update the ethernet mode */
2492         sh_eth_write(ndev, ecmr_bits, ECMR);
2493 
2494         spin_unlock_irqrestore(&mdp->lock, flags);
2495 }
2496 
2497 static int sh_eth_get_vtag_index(struct sh_eth_private *mdp)
2498 {
2499         if (!mdp->port)
2500                 return TSU_VTAG0;
2501         else
2502                 return TSU_VTAG1;
2503 }
2504 
2505 static int sh_eth_vlan_rx_add_vid(struct net_device *ndev,
2506                                   __be16 proto, u16 vid)
2507 {
2508         struct sh_eth_private *mdp = netdev_priv(ndev);
2509         int vtag_reg_index = sh_eth_get_vtag_index(mdp);
2510 
2511         if (unlikely(!mdp->cd->tsu))
2512                 return -EPERM;
2513 
2514         /* No filtering if vid = 0 */
2515         if (!vid)
2516                 return 0;
2517 
2518         mdp->vlan_num_ids++;
2519 
2520         /* The controller has one VLAN tag HW filter. So, if the filter is
2521          * already enabled, the driver disables it and the filte
2522          */
2523         if (mdp->vlan_num_ids > 1) {
2524                 /* disable VLAN filter */
2525                 sh_eth_tsu_write(mdp, 0, vtag_reg_index);
2526                 return 0;
2527         }
2528 
2529         sh_eth_tsu_write(mdp, TSU_VTAG_ENABLE | (vid & TSU_VTAG_VID_MASK),
2530                          vtag_reg_index);
2531 
2532         return 0;
2533 }
2534 
2535 static int sh_eth_vlan_rx_kill_vid(struct net_device *ndev,
2536                                    __be16 proto, u16 vid)
2537 {
2538         struct sh_eth_private *mdp = netdev_priv(ndev);
2539         int vtag_reg_index = sh_eth_get_vtag_index(mdp);
2540 
2541         if (unlikely(!mdp->cd->tsu))
2542                 return -EPERM;
2543 
2544         /* No filtering if vid = 0 */
2545         if (!vid)
2546                 return 0;
2547 
2548         mdp->vlan_num_ids--;
2549         sh_eth_tsu_write(mdp, 0, vtag_reg_index);
2550 
2551         return 0;
2552 }
2553 
2554 /* SuperH's TSU register init function */
2555 static void sh_eth_tsu_init(struct sh_eth_private *mdp)
2556 {
2557         if (sh_eth_is_rz_fast_ether(mdp)) {
2558                 sh_eth_tsu_write(mdp, 0, TSU_TEN); /* Disable all CAM entry */
2559                 return;
2560         }
2561 
2562         sh_eth_tsu_write(mdp, 0, TSU_FWEN0);    /* Disable forward(0->1) */
2563         sh_eth_tsu_write(mdp, 0, TSU_FWEN1);    /* Disable forward(1->0) */
2564         sh_eth_tsu_write(mdp, 0, TSU_FCM);      /* forward fifo 3k-3k */
2565         sh_eth_tsu_write(mdp, 0xc, TSU_BSYSL0);
2566         sh_eth_tsu_write(mdp, 0xc, TSU_BSYSL1);
2567         sh_eth_tsu_write(mdp, 0, TSU_PRISL0);
2568         sh_eth_tsu_write(mdp, 0, TSU_PRISL1);
2569         sh_eth_tsu_write(mdp, 0, TSU_FWSL0);
2570         sh_eth_tsu_write(mdp, 0, TSU_FWSL1);
2571         sh_eth_tsu_write(mdp, TSU_FWSLC_POSTENU | TSU_FWSLC_POSTENL, TSU_FWSLC);
2572         if (sh_eth_is_gether(mdp)) {
2573                 sh_eth_tsu_write(mdp, 0, TSU_QTAG0);    /* Disable QTAG(0->1) */
2574                 sh_eth_tsu_write(mdp, 0, TSU_QTAG1);    /* Disable QTAG(1->0) */
2575         } else {
2576                 sh_eth_tsu_write(mdp, 0, TSU_QTAGM0);   /* Disable QTAG(0->1) */
2577                 sh_eth_tsu_write(mdp, 0, TSU_QTAGM1);   /* Disable QTAG(1->0) */
2578         }
2579         sh_eth_tsu_write(mdp, 0, TSU_FWSR);     /* all interrupt status clear */
2580         sh_eth_tsu_write(mdp, 0, TSU_FWINMK);   /* Disable all interrupt */
2581         sh_eth_tsu_write(mdp, 0, TSU_TEN);      /* Disable all CAM entry */
2582         sh_eth_tsu_write(mdp, 0, TSU_POST1);    /* Disable CAM entry [ 0- 7] */
2583         sh_eth_tsu_write(mdp, 0, TSU_POST2);    /* Disable CAM entry [ 8-15] */
2584         sh_eth_tsu_write(mdp, 0, TSU_POST3);    /* Disable CAM entry [16-23] */
2585         sh_eth_tsu_write(mdp, 0, TSU_POST4);    /* Disable CAM entry [24-31] */
2586 }
2587 
2588 /* MDIO bus release function */
2589 static int sh_mdio_release(struct sh_eth_private *mdp)
2590 {
2591         /* unregister mdio bus */
2592         mdiobus_unregister(mdp->mii_bus);
2593 
2594         /* free bitbang info */
2595         free_mdio_bitbang(mdp->mii_bus);
2596 
2597         return 0;
2598 }
2599 
2600 /* MDIO bus init function */
2601 static int sh_mdio_init(struct sh_eth_private *mdp,
2602                         struct sh_eth_plat_data *pd)
2603 {
2604         int ret, i;
2605         struct bb_info *bitbang;
2606         struct platform_device *pdev = mdp->pdev;
2607         struct device *dev = &mdp->pdev->dev;
2608 
2609         /* create bit control struct for PHY */
2610         bitbang = devm_kzalloc(dev, sizeof(struct bb_info), GFP_KERNEL);
2611         if (!bitbang)
2612                 return -ENOMEM;
2613 
2614         /* bitbang init */
2615         bitbang->addr = mdp->addr + mdp->reg_offset[PIR];
2616         bitbang->set_gate = pd->set_mdio_gate;
2617         bitbang->mdi_msk = PIR_MDI;
2618         bitbang->mdo_msk = PIR_MDO;
2619         bitbang->mmd_msk = PIR_MMD;
2620         bitbang->mdc_msk = PIR_MDC;
2621         bitbang->ctrl.ops = &bb_ops;
2622 
2623         /* MII controller setting */
2624         mdp->mii_bus = alloc_mdio_bitbang(&bitbang->ctrl);
2625         if (!mdp->mii_bus)
2626                 return -ENOMEM;
2627 
2628         /* Hook up MII support for ethtool */
2629         mdp->mii_bus->name = "sh_mii";
2630         mdp->mii_bus->parent = dev;
2631         snprintf(mdp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
2632                  pdev->name, pdev->id);
2633 
2634         /* PHY IRQ */
2635         mdp->mii_bus->irq = devm_kmalloc_array(dev, PHY_MAX_ADDR, sizeof(int),
2636                                                GFP_KERNEL);
2637         if (!mdp->mii_bus->irq) {
2638                 ret = -ENOMEM;
2639                 goto out_free_bus;
2640         }
2641 
2642         /* register MDIO bus */
2643         if (dev->of_node) {
2644                 ret = of_mdiobus_register(mdp->mii_bus, dev->of_node);
2645         } else {
2646                 for (i = 0; i < PHY_MAX_ADDR; i++)
2647                         mdp->mii_bus->irq[i] = PHY_POLL;
2648                 if (pd->phy_irq > 0)
2649                         mdp->mii_bus->irq[pd->phy] = pd->phy_irq;
2650 
2651                 ret = mdiobus_register(mdp->mii_bus);
2652         }
2653 
2654         if (ret)
2655                 goto out_free_bus;
2656 
2657         return 0;
2658 
2659 out_free_bus:
2660         free_mdio_bitbang(mdp->mii_bus);
2661         return ret;
2662 }
2663 
2664 static const u16 *sh_eth_get_register_offset(int register_type)
2665 {
2666         const u16 *reg_offset = NULL;
2667 
2668         switch (register_type) {
2669         case SH_ETH_REG_GIGABIT:
2670                 reg_offset = sh_eth_offset_gigabit;
2671                 break;
2672         case SH_ETH_REG_FAST_RZ:
2673                 reg_offset = sh_eth_offset_fast_rz;
2674                 break;
2675         case SH_ETH_REG_FAST_RCAR:
2676                 reg_offset = sh_eth_offset_fast_rcar;
2677                 break;
2678         case SH_ETH_REG_FAST_SH4:
2679                 reg_offset = sh_eth_offset_fast_sh4;
2680                 break;
2681         case SH_ETH_REG_FAST_SH3_SH2:
2682                 reg_offset = sh_eth_offset_fast_sh3_sh2;
2683                 break;
2684         default:
2685                 break;
2686         }
2687 
2688         return reg_offset;
2689 }
2690 
2691 static const struct net_device_ops sh_eth_netdev_ops = {
2692         .ndo_open               = sh_eth_open,
2693         .ndo_stop               = sh_eth_close,
2694         .ndo_start_xmit         = sh_eth_start_xmit,
2695         .ndo_get_stats          = sh_eth_get_stats,
2696         .ndo_tx_timeout         = sh_eth_tx_timeout,
2697         .ndo_do_ioctl           = sh_eth_do_ioctl,
2698         .ndo_validate_addr      = eth_validate_addr,
2699         .ndo_set_mac_address    = eth_mac_addr,
2700         .ndo_change_mtu         = eth_change_mtu,
2701 };
2702 
2703 static const struct net_device_ops sh_eth_netdev_ops_tsu = {
2704         .ndo_open               = sh_eth_open,
2705         .ndo_stop               = sh_eth_close,
2706         .ndo_start_xmit         = sh_eth_start_xmit,
2707         .ndo_get_stats          = sh_eth_get_stats,
2708         .ndo_set_rx_mode        = sh_eth_set_multicast_list,
2709         .ndo_vlan_rx_add_vid    = sh_eth_vlan_rx_add_vid,
2710         .ndo_vlan_rx_kill_vid   = sh_eth_vlan_rx_kill_vid,
2711         .ndo_tx_timeout         = sh_eth_tx_timeout,
2712         .ndo_do_ioctl           = sh_eth_do_ioctl,
2713         .ndo_validate_addr      = eth_validate_addr,
2714         .ndo_set_mac_address    = eth_mac_addr,
2715         .ndo_change_mtu         = eth_change_mtu,
2716 };
2717 
2718 #ifdef CONFIG_OF
2719 static struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev)
2720 {
2721         struct device_node *np = dev->of_node;
2722         struct sh_eth_plat_data *pdata;
2723         const char *mac_addr;
2724 
2725         pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
2726         if (!pdata)
2727                 return NULL;
2728 
2729         pdata->phy_interface = of_get_phy_mode(np);
2730 
2731         mac_addr = of_get_mac_address(np);
2732         if (mac_addr)
2733                 memcpy(pdata->mac_addr, mac_addr, ETH_ALEN);
2734 
2735         pdata->no_ether_link =
2736                 of_property_read_bool(np, "renesas,no-ether-link");
2737         pdata->ether_link_active_low =
2738                 of_property_read_bool(np, "renesas,ether-link-active-low");
2739 
2740         return pdata;
2741 }
2742 
2743 static const struct of_device_id sh_eth_match_table[] = {
2744         { .compatible = "renesas,gether-r8a7740", .data = &r8a7740_data },
2745         { .compatible = "renesas,ether-r8a7778", .data = &r8a777x_data },
2746         { .compatible = "renesas,ether-r8a7779", .data = &r8a777x_data },
2747         { .compatible = "renesas,ether-r8a7790", .data = &r8a779x_data },
2748         { .compatible = "renesas,ether-r8a7791", .data = &r8a779x_data },
2749         { .compatible = "renesas,ether-r8a7794", .data = &r8a779x_data },
2750         { .compatible = "renesas,ether-r7s72100", .data = &r7s72100_data },
2751         { }
2752 };
2753 MODULE_DEVICE_TABLE(of, sh_eth_match_table);
2754 #else
2755 static inline struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev)
2756 {
2757         return NULL;
2758 }
2759 #endif
2760 
2761 static int sh_eth_drv_probe(struct platform_device *pdev)
2762 {
2763         int ret, devno = 0;
2764         struct resource *res;
2765         struct net_device *ndev = NULL;
2766         struct sh_eth_private *mdp = NULL;
2767         struct sh_eth_plat_data *pd = dev_get_platdata(&pdev->dev);
2768         const struct platform_device_id *id = platform_get_device_id(pdev);
2769 
2770         /* get base addr */
2771         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2772         if (unlikely(res == NULL)) {
2773                 dev_err(&pdev->dev, "invalid resource\n");
2774                 return -EINVAL;
2775         }
2776 
2777         ndev = alloc_etherdev(sizeof(struct sh_eth_private));
2778         if (!ndev)
2779                 return -ENOMEM;
2780 
2781         pm_runtime_enable(&pdev->dev);
2782         pm_runtime_get_sync(&pdev->dev);
2783 
2784         /* The sh Ether-specific entries in the device structure. */
2785         ndev->base_addr = res->start;
2786         devno = pdev->id;
2787         if (devno < 0)
2788                 devno = 0;
2789 
2790         ndev->dma = -1;
2791         ret = platform_get_irq(pdev, 0);
2792         if (ret < 0) {
2793                 ret = -ENODEV;
2794                 goto out_release;
2795         }
2796         ndev->irq = ret;
2797 
2798         SET_NETDEV_DEV(ndev, &pdev->dev);
2799 
2800         mdp = netdev_priv(ndev);
2801         mdp->num_tx_ring = TX_RING_SIZE;
2802         mdp->num_rx_ring = RX_RING_SIZE;
2803         mdp->addr = devm_ioremap_resource(&pdev->dev, res);
2804         if (IS_ERR(mdp->addr)) {
2805                 ret = PTR_ERR(mdp->addr);
2806                 goto out_release;
2807         }
2808 
2809         spin_lock_init(&mdp->lock);
2810         mdp->pdev = pdev;
2811 
2812         if (pdev->dev.of_node)
2813                 pd = sh_eth_parse_dt(&pdev->dev);
2814         if (!pd) {
2815                 dev_err(&pdev->dev, "no platform data\n");
2816                 ret = -EINVAL;
2817                 goto out_release;
2818         }
2819 
2820         /* get PHY ID */
2821         mdp->phy_id = pd->phy;
2822         mdp->phy_interface = pd->phy_interface;
2823         /* EDMAC endian */
2824         mdp->edmac_endian = pd->edmac_endian;
2825         mdp->no_ether_link = pd->no_ether_link;
2826         mdp->ether_link_active_low = pd->ether_link_active_low;
2827 
2828         /* set cpu data */
2829         if (id) {
2830                 mdp->cd = (struct sh_eth_cpu_data *)id->driver_data;
2831         } else  {
2832                 const struct of_device_id *match;
2833 
2834                 match = of_match_device(of_match_ptr(sh_eth_match_table),
2835                                         &pdev->dev);
2836                 mdp->cd = (struct sh_eth_cpu_data *)match->data;
2837         }
2838         mdp->reg_offset = sh_eth_get_register_offset(mdp->cd->register_type);
2839         if (!mdp->reg_offset) {
2840                 dev_err(&pdev->dev, "Unknown register type (%d)\n",
2841                         mdp->cd->register_type);
2842                 ret = -EINVAL;
2843                 goto out_release;
2844         }
2845         sh_eth_set_default_cpu_data(mdp->cd);
2846 
2847         /* set function */
2848         if (mdp->cd->tsu)
2849                 ndev->netdev_ops = &sh_eth_netdev_ops_tsu;
2850         else
2851                 ndev->netdev_ops = &sh_eth_netdev_ops;
2852         ndev->ethtool_ops = &sh_eth_ethtool_ops;
2853         ndev->watchdog_timeo = TX_TIMEOUT;
2854 
2855         /* debug message level */
2856         mdp->msg_enable = SH_ETH_DEF_MSG_ENABLE;
2857 
2858         /* read and set MAC address */
2859         read_mac_address(ndev, pd->mac_addr);
2860         if (!is_valid_ether_addr(ndev->dev_addr)) {
2861                 dev_warn(&pdev->dev,
2862                          "no valid MAC address supplied, using a random one.\n");
2863                 eth_hw_addr_random(ndev);
2864         }
2865 
2866         /* ioremap the TSU registers */
2867         if (mdp->cd->tsu) {
2868                 struct resource *rtsu;
2869                 rtsu = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2870                 mdp->tsu_addr = devm_ioremap_resource(&pdev->dev, rtsu);
2871                 if (IS_ERR(mdp->tsu_addr)) {
2872                         ret = PTR_ERR(mdp->tsu_addr);
2873                         goto out_release;
2874                 }
2875                 mdp->port = devno % 2;
2876                 ndev->features = NETIF_F_HW_VLAN_CTAG_FILTER;
2877         }
2878 
2879         /* initialize first or needed device */
2880         if (!devno || pd->needs_init) {
2881                 if (mdp->cd->chip_reset)
2882                         mdp->cd->chip_reset(ndev);
2883 
2884                 if (mdp->cd->tsu) {
2885                         /* TSU init (Init only)*/
2886                         sh_eth_tsu_init(mdp);
2887                 }
2888         }
2889 
2890         /* MDIO bus init */
2891         ret = sh_mdio_init(mdp, pd);
2892         if (ret) {
2893                 dev_err(&ndev->dev, "failed to initialise MDIO\n");
2894                 goto out_release;
2895         }
2896 
2897         netif_napi_add(ndev, &mdp->napi, sh_eth_poll, 64);
2898 
2899         /* network device register */
2900         ret = register_netdev(ndev);
2901         if (ret)
2902                 goto out_napi_del;
2903 
2904         /* print device information */
2905         netdev_info(ndev, "Base address at 0x%x, %pM, IRQ %d.\n",
2906                     (u32)ndev->base_addr, ndev->dev_addr, ndev->irq);
2907 
2908         pm_runtime_put(&pdev->dev);
2909         platform_set_drvdata(pdev, ndev);
2910 
2911         return ret;
2912 
2913 out_napi_del:
2914         netif_napi_del(&mdp->napi);
2915         sh_mdio_release(mdp);
2916 
2917 out_release:
2918         /* net_dev free */
2919         if (ndev)
2920                 free_netdev(ndev);
2921 
2922         pm_runtime_put(&pdev->dev);
2923         pm_runtime_disable(&pdev->dev);
2924         return ret;
2925 }
2926 
2927 static int sh_eth_drv_remove(struct platform_device *pdev)
2928 {
2929         struct net_device *ndev = platform_get_drvdata(pdev);
2930         struct sh_eth_private *mdp = netdev_priv(ndev);
2931 
2932         unregister_netdev(ndev);
2933         netif_napi_del(&mdp->napi);
2934         sh_mdio_release(mdp);
2935         pm_runtime_disable(&pdev->dev);
2936         free_netdev(ndev);
2937 
2938         return 0;
2939 }
2940 
2941 #ifdef CONFIG_PM
2942 static int sh_eth_runtime_nop(struct device *dev)
2943 {
2944         /* Runtime PM callback shared between ->runtime_suspend()
2945          * and ->runtime_resume(). Simply returns success.
2946          *
2947          * This driver re-initializes all registers after
2948          * pm_runtime_get_sync() anyway so there is no need
2949          * to save and restore registers here.
2950          */
2951         return 0;
2952 }
2953 
2954 static const struct dev_pm_ops sh_eth_dev_pm_ops = {
2955         .runtime_suspend = sh_eth_runtime_nop,
2956         .runtime_resume = sh_eth_runtime_nop,
2957 };
2958 #define SH_ETH_PM_OPS (&sh_eth_dev_pm_ops)
2959 #else
2960 #define SH_ETH_PM_OPS NULL
2961 #endif
2962 
2963 static struct platform_device_id sh_eth_id_table[] = {
2964         { "sh7619-ether", (kernel_ulong_t)&sh7619_data },
2965         { "sh771x-ether", (kernel_ulong_t)&sh771x_data },
2966         { "sh7724-ether", (kernel_ulong_t)&sh7724_data },
2967         { "sh7734-gether", (kernel_ulong_t)&sh7734_data },
2968         { "sh7757-ether", (kernel_ulong_t)&sh7757_data },
2969         { "sh7757-gether", (kernel_ulong_t)&sh7757_data_giga },
2970         { "sh7763-gether", (kernel_ulong_t)&sh7763_data },
2971         { "r7s72100-ether", (kernel_ulong_t)&r7s72100_data },
2972         { "r8a7740-gether", (kernel_ulong_t)&r8a7740_data },
2973         { "r8a777x-ether", (kernel_ulong_t)&r8a777x_data },
2974         { "r8a7790-ether", (kernel_ulong_t)&r8a779x_data },
2975         { "r8a7791-ether", (kernel_ulong_t)&r8a779x_data },
2976         { "r8a7794-ether", (kernel_ulong_t)&r8a779x_data },
2977         { }
2978 };
2979 MODULE_DEVICE_TABLE(platform, sh_eth_id_table);
2980 
2981 static struct platform_driver sh_eth_driver = {
2982         .probe = sh_eth_drv_probe,
2983         .remove = sh_eth_drv_remove,
2984         .id_table = sh_eth_id_table,
2985         .driver = {
2986                    .name = CARDNAME,
2987                    .pm = SH_ETH_PM_OPS,
2988                    .of_match_table = of_match_ptr(sh_eth_match_table),
2989         },
2990 };
2991 
2992 module_platform_driver(sh_eth_driver);
2993 
2994 MODULE_AUTHOR("Nobuhiro Iwamatsu, Yoshihiro Shimoda");
2995 MODULE_DESCRIPTION("Renesas SuperH Ethernet driver");
2996 MODULE_LICENSE("GPL v2");
2997 

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