Version:  2.0.40 2.2.26 2.4.37 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9

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

  1 /*  SuperH Ethernet device driver
  2  *
  3  *  Copyright (C) 2014  Renesas Electronics Corporation
  4  *  Copyright (C) 2006-2012 Nobuhiro Iwamatsu
  5  *  Copyright (C) 2008-2014 Renesas Solutions Corp.
  6  *  Copyright (C) 2013-2016 Cogent Embedded, Inc.
  7  *  Copyright (C) 2014 Codethink Limited
  8  *
  9  *  This program is free software; you can redistribute it and/or modify it
 10  *  under the terms and conditions of the GNU General Public License,
 11  *  version 2, as published by the Free Software Foundation.
 12  *
 13  *  This program is distributed in the hope it will be useful, but WITHOUT
 14  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 15  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 16  *  more details.
 17  *
 18  *  The full GNU General Public License is included in this distribution in
 19  *  the file called "COPYING".
 20  */
 21 
 22 #include <linux/module.h>
 23 #include <linux/kernel.h>
 24 #include <linux/spinlock.h>
 25 #include <linux/interrupt.h>
 26 #include <linux/dma-mapping.h>
 27 #include <linux/etherdevice.h>
 28 #include <linux/delay.h>
 29 #include <linux/platform_device.h>
 30 #include <linux/mdio-bitbang.h>
 31 #include <linux/netdevice.h>
 32 #include <linux/of.h>
 33 #include <linux/of_device.h>
 34 #include <linux/of_irq.h>
 35 #include <linux/of_net.h>
 36 #include <linux/phy.h>
 37 #include <linux/cache.h>
 38 #include <linux/io.h>
 39 #include <linux/pm_runtime.h>
 40 #include <linux/slab.h>
 41 #include <linux/ethtool.h>
 42 #include <linux/if_vlan.h>
 43 #include <linux/clk.h>
 44 #include <linux/sh_eth.h>
 45 #include <linux/of_mdio.h>
 46 
 47 #include "sh_eth.h"
 48 
 49 #define SH_ETH_DEF_MSG_ENABLE \
 50                 (NETIF_MSG_LINK | \
 51                 NETIF_MSG_TIMER | \
 52                 NETIF_MSG_RX_ERR| \
 53                 NETIF_MSG_TX_ERR)
 54 
 55 #define SH_ETH_OFFSET_INVALID   ((u16)~0)
 56 
 57 #define SH_ETH_OFFSET_DEFAULTS                  \
 58         [0 ... SH_ETH_MAX_REGISTER_OFFSET - 1] = SH_ETH_OFFSET_INVALID
 59 
 60 static const u16 sh_eth_offset_gigabit[SH_ETH_MAX_REGISTER_OFFSET] = {
 61         SH_ETH_OFFSET_DEFAULTS,
 62 
 63         [EDSR]          = 0x0000,
 64         [EDMR]          = 0x0400,
 65         [EDTRR]         = 0x0408,
 66         [EDRRR]         = 0x0410,
 67         [EESR]          = 0x0428,
 68         [EESIPR]        = 0x0430,
 69         [TDLAR]         = 0x0010,
 70         [TDFAR]         = 0x0014,
 71         [TDFXR]         = 0x0018,
 72         [TDFFR]         = 0x001c,
 73         [RDLAR]         = 0x0030,
 74         [RDFAR]         = 0x0034,
 75         [RDFXR]         = 0x0038,
 76         [RDFFR]         = 0x003c,
 77         [TRSCER]        = 0x0438,
 78         [RMFCR]         = 0x0440,
 79         [TFTR]          = 0x0448,
 80         [FDR]           = 0x0450,
 81         [RMCR]          = 0x0458,
 82         [RPADIR]        = 0x0460,
 83         [FCFTR]         = 0x0468,
 84         [CSMR]          = 0x04E4,
 85 
 86         [ECMR]          = 0x0500,
 87         [ECSR]          = 0x0510,
 88         [ECSIPR]        = 0x0518,
 89         [PIR]           = 0x0520,
 90         [PSR]           = 0x0528,
 91         [PIPR]          = 0x052c,
 92         [RFLR]          = 0x0508,
 93         [APR]           = 0x0554,
 94         [MPR]           = 0x0558,
 95         [PFTCR]         = 0x055c,
 96         [PFRCR]         = 0x0560,
 97         [TPAUSER]       = 0x0564,
 98         [GECMR]         = 0x05b0,
 99         [BCULR]         = 0x05b4,
100         [MAHR]          = 0x05c0,
101         [MALR]          = 0x05c8,
102         [TROCR]         = 0x0700,
103         [CDCR]          = 0x0708,
104         [LCCR]          = 0x0710,
105         [CEFCR]         = 0x0740,
106         [FRECR]         = 0x0748,
107         [TSFRCR]        = 0x0750,
108         [TLFRCR]        = 0x0758,
109         [RFCR]          = 0x0760,
110         [CERCR]         = 0x0768,
111         [CEECR]         = 0x0770,
112         [MAFCR]         = 0x0778,
113         [RMII_MII]      = 0x0790,
114 
115         [ARSTR]         = 0x0000,
116         [TSU_CTRST]     = 0x0004,
117         [TSU_FWEN0]     = 0x0010,
118         [TSU_FWEN1]     = 0x0014,
119         [TSU_FCM]       = 0x0018,
120         [TSU_BSYSL0]    = 0x0020,
121         [TSU_BSYSL1]    = 0x0024,
122         [TSU_PRISL0]    = 0x0028,
123         [TSU_PRISL1]    = 0x002c,
124         [TSU_FWSL0]     = 0x0030,
125         [TSU_FWSL1]     = 0x0034,
126         [TSU_FWSLC]     = 0x0038,
127         [TSU_QTAG0]     = 0x0040,
128         [TSU_QTAG1]     = 0x0044,
129         [TSU_FWSR]      = 0x0050,
130         [TSU_FWINMK]    = 0x0054,
131         [TSU_ADQT0]     = 0x0048,
132         [TSU_ADQT1]     = 0x004c,
133         [TSU_VTAG0]     = 0x0058,
134         [TSU_VTAG1]     = 0x005c,
135         [TSU_ADSBSY]    = 0x0060,
136         [TSU_TEN]       = 0x0064,
137         [TSU_POST1]     = 0x0070,
138         [TSU_POST2]     = 0x0074,
139         [TSU_POST3]     = 0x0078,
140         [TSU_POST4]     = 0x007c,
141         [TSU_ADRH0]     = 0x0100,
142 
143         [TXNLCR0]       = 0x0080,
144         [TXALCR0]       = 0x0084,
145         [RXNLCR0]       = 0x0088,
146         [RXALCR0]       = 0x008c,
147         [FWNLCR0]       = 0x0090,
148         [FWALCR0]       = 0x0094,
149         [TXNLCR1]       = 0x00a0,
150         [TXALCR1]       = 0x00a0,
151         [RXNLCR1]       = 0x00a8,
152         [RXALCR1]       = 0x00ac,
153         [FWNLCR1]       = 0x00b0,
154         [FWALCR1]       = 0x00b4,
155 };
156 
157 static const u16 sh_eth_offset_fast_rz[SH_ETH_MAX_REGISTER_OFFSET] = {
158         SH_ETH_OFFSET_DEFAULTS,
159 
160         [EDSR]          = 0x0000,
161         [EDMR]          = 0x0400,
162         [EDTRR]         = 0x0408,
163         [EDRRR]         = 0x0410,
164         [EESR]          = 0x0428,
165         [EESIPR]        = 0x0430,
166         [TDLAR]         = 0x0010,
167         [TDFAR]         = 0x0014,
168         [TDFXR]         = 0x0018,
169         [TDFFR]         = 0x001c,
170         [RDLAR]         = 0x0030,
171         [RDFAR]         = 0x0034,
172         [RDFXR]         = 0x0038,
173         [RDFFR]         = 0x003c,
174         [TRSCER]        = 0x0438,
175         [RMFCR]         = 0x0440,
176         [TFTR]          = 0x0448,
177         [FDR]           = 0x0450,
178         [RMCR]          = 0x0458,
179         [RPADIR]        = 0x0460,
180         [FCFTR]         = 0x0468,
181         [CSMR]          = 0x04E4,
182 
183         [ECMR]          = 0x0500,
184         [RFLR]          = 0x0508,
185         [ECSR]          = 0x0510,
186         [ECSIPR]        = 0x0518,
187         [PIR]           = 0x0520,
188         [APR]           = 0x0554,
189         [MPR]           = 0x0558,
190         [PFTCR]         = 0x055c,
191         [PFRCR]         = 0x0560,
192         [TPAUSER]       = 0x0564,
193         [MAHR]          = 0x05c0,
194         [MALR]          = 0x05c8,
195         [CEFCR]         = 0x0740,
196         [FRECR]         = 0x0748,
197         [TSFRCR]        = 0x0750,
198         [TLFRCR]        = 0x0758,
199         [RFCR]          = 0x0760,
200         [MAFCR]         = 0x0778,
201 
202         [ARSTR]         = 0x0000,
203         [TSU_CTRST]     = 0x0004,
204         [TSU_FWSLC]     = 0x0038,
205         [TSU_VTAG0]     = 0x0058,
206         [TSU_ADSBSY]    = 0x0060,
207         [TSU_TEN]       = 0x0064,
208         [TSU_POST1]     = 0x0070,
209         [TSU_POST2]     = 0x0074,
210         [TSU_POST3]     = 0x0078,
211         [TSU_POST4]     = 0x007c,
212         [TSU_ADRH0]     = 0x0100,
213 
214         [TXNLCR0]       = 0x0080,
215         [TXALCR0]       = 0x0084,
216         [RXNLCR0]       = 0x0088,
217         [RXALCR0]       = 0x008C,
218 };
219 
220 static const u16 sh_eth_offset_fast_rcar[SH_ETH_MAX_REGISTER_OFFSET] = {
221         SH_ETH_OFFSET_DEFAULTS,
222 
223         [ECMR]          = 0x0300,
224         [RFLR]          = 0x0308,
225         [ECSR]          = 0x0310,
226         [ECSIPR]        = 0x0318,
227         [PIR]           = 0x0320,
228         [PSR]           = 0x0328,
229         [RDMLR]         = 0x0340,
230         [IPGR]          = 0x0350,
231         [APR]           = 0x0354,
232         [MPR]           = 0x0358,
233         [RFCF]          = 0x0360,
234         [TPAUSER]       = 0x0364,
235         [TPAUSECR]      = 0x0368,
236         [MAHR]          = 0x03c0,
237         [MALR]          = 0x03c8,
238         [TROCR]         = 0x03d0,
239         [CDCR]          = 0x03d4,
240         [LCCR]          = 0x03d8,
241         [CNDCR]         = 0x03dc,
242         [CEFCR]         = 0x03e4,
243         [FRECR]         = 0x03e8,
244         [TSFRCR]        = 0x03ec,
245         [TLFRCR]        = 0x03f0,
246         [RFCR]          = 0x03f4,
247         [MAFCR]         = 0x03f8,
248 
249         [EDMR]          = 0x0200,
250         [EDTRR]         = 0x0208,
251         [EDRRR]         = 0x0210,
252         [TDLAR]         = 0x0218,
253         [RDLAR]         = 0x0220,
254         [EESR]          = 0x0228,
255         [EESIPR]        = 0x0230,
256         [TRSCER]        = 0x0238,
257         [RMFCR]         = 0x0240,
258         [TFTR]          = 0x0248,
259         [FDR]           = 0x0250,
260         [RMCR]          = 0x0258,
261         [TFUCR]         = 0x0264,
262         [RFOCR]         = 0x0268,
263         [RMIIMODE]      = 0x026c,
264         [FCFTR]         = 0x0270,
265         [TRIMD]         = 0x027c,
266 };
267 
268 static const u16 sh_eth_offset_fast_sh4[SH_ETH_MAX_REGISTER_OFFSET] = {
269         SH_ETH_OFFSET_DEFAULTS,
270 
271         [ECMR]          = 0x0100,
272         [RFLR]          = 0x0108,
273         [ECSR]          = 0x0110,
274         [ECSIPR]        = 0x0118,
275         [PIR]           = 0x0120,
276         [PSR]           = 0x0128,
277         [RDMLR]         = 0x0140,
278         [IPGR]          = 0x0150,
279         [APR]           = 0x0154,
280         [MPR]           = 0x0158,
281         [TPAUSER]       = 0x0164,
282         [RFCF]          = 0x0160,
283         [TPAUSECR]      = 0x0168,
284         [BCFRR]         = 0x016c,
285         [MAHR]          = 0x01c0,
286         [MALR]          = 0x01c8,
287         [TROCR]         = 0x01d0,
288         [CDCR]          = 0x01d4,
289         [LCCR]          = 0x01d8,
290         [CNDCR]         = 0x01dc,
291         [CEFCR]         = 0x01e4,
292         [FRECR]         = 0x01e8,
293         [TSFRCR]        = 0x01ec,
294         [TLFRCR]        = 0x01f0,
295         [RFCR]          = 0x01f4,
296         [MAFCR]         = 0x01f8,
297         [RTRATE]        = 0x01fc,
298 
299         [EDMR]          = 0x0000,
300         [EDTRR]         = 0x0008,
301         [EDRRR]         = 0x0010,
302         [TDLAR]         = 0x0018,
303         [RDLAR]         = 0x0020,
304         [EESR]          = 0x0028,
305         [EESIPR]        = 0x0030,
306         [TRSCER]        = 0x0038,
307         [RMFCR]         = 0x0040,
308         [TFTR]          = 0x0048,
309         [FDR]           = 0x0050,
310         [RMCR]          = 0x0058,
311         [TFUCR]         = 0x0064,
312         [RFOCR]         = 0x0068,
313         [FCFTR]         = 0x0070,
314         [RPADIR]        = 0x0078,
315         [TRIMD]         = 0x007c,
316         [RBWAR]         = 0x00c8,
317         [RDFAR]         = 0x00cc,
318         [TBRAR]         = 0x00d4,
319         [TDFAR]         = 0x00d8,
320 };
321 
322 static const u16 sh_eth_offset_fast_sh3_sh2[SH_ETH_MAX_REGISTER_OFFSET] = {
323         SH_ETH_OFFSET_DEFAULTS,
324 
325         [EDMR]          = 0x0000,
326         [EDTRR]         = 0x0004,
327         [EDRRR]         = 0x0008,
328         [TDLAR]         = 0x000c,
329         [RDLAR]         = 0x0010,
330         [EESR]          = 0x0014,
331         [EESIPR]        = 0x0018,
332         [TRSCER]        = 0x001c,
333         [RMFCR]         = 0x0020,
334         [TFTR]          = 0x0024,
335         [FDR]           = 0x0028,
336         [RMCR]          = 0x002c,
337         [EDOCR]         = 0x0030,
338         [FCFTR]         = 0x0034,
339         [RPADIR]        = 0x0038,
340         [TRIMD]         = 0x003c,
341         [RBWAR]         = 0x0040,
342         [RDFAR]         = 0x0044,
343         [TBRAR]         = 0x004c,
344         [TDFAR]         = 0x0050,
345 
346         [ECMR]          = 0x0160,
347         [ECSR]          = 0x0164,
348         [ECSIPR]        = 0x0168,
349         [PIR]           = 0x016c,
350         [MAHR]          = 0x0170,
351         [MALR]          = 0x0174,
352         [RFLR]          = 0x0178,
353         [PSR]           = 0x017c,
354         [TROCR]         = 0x0180,
355         [CDCR]          = 0x0184,
356         [LCCR]          = 0x0188,
357         [CNDCR]         = 0x018c,
358         [CEFCR]         = 0x0194,
359         [FRECR]         = 0x0198,
360         [TSFRCR]        = 0x019c,
361         [TLFRCR]        = 0x01a0,
362         [RFCR]          = 0x01a4,
363         [MAFCR]         = 0x01a8,
364         [IPGR]          = 0x01b4,
365         [APR]           = 0x01b8,
366         [MPR]           = 0x01bc,
367         [TPAUSER]       = 0x01c4,
368         [BCFR]          = 0x01cc,
369 
370         [ARSTR]         = 0x0000,
371         [TSU_CTRST]     = 0x0004,
372         [TSU_FWEN0]     = 0x0010,
373         [TSU_FWEN1]     = 0x0014,
374         [TSU_FCM]       = 0x0018,
375         [TSU_BSYSL0]    = 0x0020,
376         [TSU_BSYSL1]    = 0x0024,
377         [TSU_PRISL0]    = 0x0028,
378         [TSU_PRISL1]    = 0x002c,
379         [TSU_FWSL0]     = 0x0030,
380         [TSU_FWSL1]     = 0x0034,
381         [TSU_FWSLC]     = 0x0038,
382         [TSU_QTAGM0]    = 0x0040,
383         [TSU_QTAGM1]    = 0x0044,
384         [TSU_ADQT0]     = 0x0048,
385         [TSU_ADQT1]     = 0x004c,
386         [TSU_FWSR]      = 0x0050,
387         [TSU_FWINMK]    = 0x0054,
388         [TSU_ADSBSY]    = 0x0060,
389         [TSU_TEN]       = 0x0064,
390         [TSU_POST1]     = 0x0070,
391         [TSU_POST2]     = 0x0074,
392         [TSU_POST3]     = 0x0078,
393         [TSU_POST4]     = 0x007c,
394 
395         [TXNLCR0]       = 0x0080,
396         [TXALCR0]       = 0x0084,
397         [RXNLCR0]       = 0x0088,
398         [RXALCR0]       = 0x008c,
399         [FWNLCR0]       = 0x0090,
400         [FWALCR0]       = 0x0094,
401         [TXNLCR1]       = 0x00a0,
402         [TXALCR1]       = 0x00a0,
403         [RXNLCR1]       = 0x00a8,
404         [RXALCR1]       = 0x00ac,
405         [FWNLCR1]       = 0x00b0,
406         [FWALCR1]       = 0x00b4,
407 
408         [TSU_ADRH0]     = 0x0100,
409 };
410 
411 static void sh_eth_rcv_snd_disable(struct net_device *ndev);
412 static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev);
413 
414 static void sh_eth_write(struct net_device *ndev, u32 data, int enum_index)
415 {
416         struct sh_eth_private *mdp = netdev_priv(ndev);
417         u16 offset = mdp->reg_offset[enum_index];
418 
419         if (WARN_ON(offset == SH_ETH_OFFSET_INVALID))
420                 return;
421 
422         iowrite32(data, mdp->addr + offset);
423 }
424 
425 static u32 sh_eth_read(struct net_device *ndev, int enum_index)
426 {
427         struct sh_eth_private *mdp = netdev_priv(ndev);
428         u16 offset = mdp->reg_offset[enum_index];
429 
430         if (WARN_ON(offset == SH_ETH_OFFSET_INVALID))
431                 return ~0U;
432 
433         return ioread32(mdp->addr + offset);
434 }
435 
436 static void sh_eth_modify(struct net_device *ndev, int enum_index, u32 clear,
437                           u32 set)
438 {
439         sh_eth_write(ndev, (sh_eth_read(ndev, enum_index) & ~clear) | set,
440                      enum_index);
441 }
442 
443 static bool sh_eth_is_gether(struct sh_eth_private *mdp)
444 {
445         return mdp->reg_offset == sh_eth_offset_gigabit;
446 }
447 
448 static bool sh_eth_is_rz_fast_ether(struct sh_eth_private *mdp)
449 {
450         return mdp->reg_offset == sh_eth_offset_fast_rz;
451 }
452 
453 static void sh_eth_select_mii(struct net_device *ndev)
454 {
455         struct sh_eth_private *mdp = netdev_priv(ndev);
456         u32 value;
457 
458         switch (mdp->phy_interface) {
459         case PHY_INTERFACE_MODE_GMII:
460                 value = 0x2;
461                 break;
462         case PHY_INTERFACE_MODE_MII:
463                 value = 0x1;
464                 break;
465         case PHY_INTERFACE_MODE_RMII:
466                 value = 0x0;
467                 break;
468         default:
469                 netdev_warn(ndev,
470                             "PHY interface mode was not setup. Set to MII.\n");
471                 value = 0x1;
472                 break;
473         }
474 
475         sh_eth_write(ndev, value, RMII_MII);
476 }
477 
478 static void sh_eth_set_duplex(struct net_device *ndev)
479 {
480         struct sh_eth_private *mdp = netdev_priv(ndev);
481 
482         sh_eth_modify(ndev, ECMR, ECMR_DM, mdp->duplex ? ECMR_DM : 0);
483 }
484 
485 static void sh_eth_chip_reset(struct net_device *ndev)
486 {
487         struct sh_eth_private *mdp = netdev_priv(ndev);
488 
489         /* reset device */
490         sh_eth_tsu_write(mdp, ARSTR_ARST, ARSTR);
491         mdelay(1);
492 }
493 
494 static void sh_eth_set_rate_gether(struct net_device *ndev)
495 {
496         struct sh_eth_private *mdp = netdev_priv(ndev);
497 
498         switch (mdp->speed) {
499         case 10: /* 10BASE */
500                 sh_eth_write(ndev, GECMR_10, GECMR);
501                 break;
502         case 100:/* 100BASE */
503                 sh_eth_write(ndev, GECMR_100, GECMR);
504                 break;
505         case 1000: /* 1000BASE */
506                 sh_eth_write(ndev, GECMR_1000, GECMR);
507                 break;
508         }
509 }
510 
511 #ifdef CONFIG_OF
512 /* R7S72100 */
513 static struct sh_eth_cpu_data r7s72100_data = {
514         .chip_reset     = sh_eth_chip_reset,
515         .set_duplex     = sh_eth_set_duplex,
516 
517         .register_type  = SH_ETH_REG_FAST_RZ,
518 
519         .ecsr_value     = ECSR_ICD,
520         .ecsipr_value   = ECSIPR_ICDIP,
521         .eesipr_value   = 0xe77f009f,
522 
523         .tx_check       = EESR_TC1 | EESR_FTC,
524         .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
525                           EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
526                           EESR_TDE | EESR_ECI,
527         .fdr_value      = 0x0000070f,
528 
529         .no_psr         = 1,
530         .apr            = 1,
531         .mpr            = 1,
532         .tpauser        = 1,
533         .hw_swap        = 1,
534         .rpadir         = 1,
535         .rpadir_value   = 2 << 16,
536         .no_trimd       = 1,
537         .no_ade         = 1,
538         .hw_crc         = 1,
539         .tsu            = 1,
540         .shift_rd0      = 1,
541 };
542 
543 static void sh_eth_chip_reset_r8a7740(struct net_device *ndev)
544 {
545         sh_eth_chip_reset(ndev);
546 
547         sh_eth_select_mii(ndev);
548 }
549 
550 /* R8A7740 */
551 static struct sh_eth_cpu_data r8a7740_data = {
552         .chip_reset     = sh_eth_chip_reset_r8a7740,
553         .set_duplex     = sh_eth_set_duplex,
554         .set_rate       = sh_eth_set_rate_gether,
555 
556         .register_type  = SH_ETH_REG_GIGABIT,
557 
558         .ecsr_value     = ECSR_ICD | ECSR_MPD,
559         .ecsipr_value   = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
560         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
561 
562         .tx_check       = EESR_TC1 | EESR_FTC,
563         .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
564                           EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
565                           EESR_TDE | EESR_ECI,
566         .fdr_value      = 0x0000070f,
567 
568         .apr            = 1,
569         .mpr            = 1,
570         .tpauser        = 1,
571         .bculr          = 1,
572         .hw_swap        = 1,
573         .rpadir         = 1,
574         .rpadir_value   = 2 << 16,
575         .no_trimd       = 1,
576         .no_ade         = 1,
577         .tsu            = 1,
578         .select_mii     = 1,
579         .shift_rd0      = 1,
580 };
581 
582 /* There is CPU dependent code */
583 static void sh_eth_set_rate_r8a777x(struct net_device *ndev)
584 {
585         struct sh_eth_private *mdp = netdev_priv(ndev);
586 
587         switch (mdp->speed) {
588         case 10: /* 10BASE */
589                 sh_eth_modify(ndev, ECMR, ECMR_ELB, 0);
590                 break;
591         case 100:/* 100BASE */
592                 sh_eth_modify(ndev, ECMR, ECMR_ELB, ECMR_ELB);
593                 break;
594         }
595 }
596 
597 /* R8A7778/9 */
598 static struct sh_eth_cpu_data r8a777x_data = {
599         .set_duplex     = sh_eth_set_duplex,
600         .set_rate       = sh_eth_set_rate_r8a777x,
601 
602         .register_type  = SH_ETH_REG_FAST_RCAR,
603 
604         .ecsr_value     = ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
605         .ecsipr_value   = ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
606         .eesipr_value   = 0x01ff009f,
607 
608         .tx_check       = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
609         .eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
610                           EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
611                           EESR_ECI,
612         .fdr_value      = 0x00000f0f,
613 
614         .apr            = 1,
615         .mpr            = 1,
616         .tpauser        = 1,
617         .hw_swap        = 1,
618 };
619 
620 /* R8A7790/1 */
621 static struct sh_eth_cpu_data r8a779x_data = {
622         .set_duplex     = sh_eth_set_duplex,
623         .set_rate       = sh_eth_set_rate_r8a777x,
624 
625         .register_type  = SH_ETH_REG_FAST_RCAR,
626 
627         .ecsr_value     = ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
628         .ecsipr_value   = ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
629         .eesipr_value   = 0x01ff009f,
630 
631         .tx_check       = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
632         .eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
633                           EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
634                           EESR_ECI,
635         .fdr_value      = 0x00000f0f,
636 
637         .trscer_err_mask = DESC_I_RINT8,
638 
639         .apr            = 1,
640         .mpr            = 1,
641         .tpauser        = 1,
642         .hw_swap        = 1,
643         .rmiimode       = 1,
644 };
645 #endif /* CONFIG_OF */
646 
647 static void sh_eth_set_rate_sh7724(struct net_device *ndev)
648 {
649         struct sh_eth_private *mdp = netdev_priv(ndev);
650 
651         switch (mdp->speed) {
652         case 10: /* 10BASE */
653                 sh_eth_modify(ndev, ECMR, ECMR_RTM, 0);
654                 break;
655         case 100:/* 100BASE */
656                 sh_eth_modify(ndev, ECMR, ECMR_RTM, ECMR_RTM);
657                 break;
658         }
659 }
660 
661 /* SH7724 */
662 static struct sh_eth_cpu_data sh7724_data = {
663         .set_duplex     = sh_eth_set_duplex,
664         .set_rate       = sh_eth_set_rate_sh7724,
665 
666         .register_type  = SH_ETH_REG_FAST_SH4,
667 
668         .ecsr_value     = ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
669         .ecsipr_value   = ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
670         .eesipr_value   = 0x01ff009f,
671 
672         .tx_check       = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
673         .eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
674                           EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
675                           EESR_ECI,
676 
677         .apr            = 1,
678         .mpr            = 1,
679         .tpauser        = 1,
680         .hw_swap        = 1,
681         .rpadir         = 1,
682         .rpadir_value   = 0x00020000, /* NET_IP_ALIGN assumed to be 2 */
683 };
684 
685 static void sh_eth_set_rate_sh7757(struct net_device *ndev)
686 {
687         struct sh_eth_private *mdp = netdev_priv(ndev);
688 
689         switch (mdp->speed) {
690         case 10: /* 10BASE */
691                 sh_eth_write(ndev, 0, RTRATE);
692                 break;
693         case 100:/* 100BASE */
694                 sh_eth_write(ndev, 1, RTRATE);
695                 break;
696         }
697 }
698 
699 /* SH7757 */
700 static struct sh_eth_cpu_data sh7757_data = {
701         .set_duplex     = sh_eth_set_duplex,
702         .set_rate       = sh_eth_set_rate_sh7757,
703 
704         .register_type  = SH_ETH_REG_FAST_SH4,
705 
706         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
707 
708         .tx_check       = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
709         .eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
710                           EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
711                           EESR_ECI,
712 
713         .irq_flags      = IRQF_SHARED,
714         .apr            = 1,
715         .mpr            = 1,
716         .tpauser        = 1,
717         .hw_swap        = 1,
718         .no_ade         = 1,
719         .rpadir         = 1,
720         .rpadir_value   = 2 << 16,
721         .rtrate         = 1,
722 };
723 
724 #define SH_GIGA_ETH_BASE        0xfee00000UL
725 #define GIGA_MALR(port)         (SH_GIGA_ETH_BASE + 0x800 * (port) + 0x05c8)
726 #define GIGA_MAHR(port)         (SH_GIGA_ETH_BASE + 0x800 * (port) + 0x05c0)
727 static void sh_eth_chip_reset_giga(struct net_device *ndev)
728 {
729         u32 mahr[2], malr[2];
730         int i;
731 
732         /* save MAHR and MALR */
733         for (i = 0; i < 2; i++) {
734                 malr[i] = ioread32((void *)GIGA_MALR(i));
735                 mahr[i] = ioread32((void *)GIGA_MAHR(i));
736         }
737 
738         sh_eth_chip_reset(ndev);
739 
740         /* restore MAHR and MALR */
741         for (i = 0; i < 2; i++) {
742                 iowrite32(malr[i], (void *)GIGA_MALR(i));
743                 iowrite32(mahr[i], (void *)GIGA_MAHR(i));
744         }
745 }
746 
747 static void sh_eth_set_rate_giga(struct net_device *ndev)
748 {
749         struct sh_eth_private *mdp = netdev_priv(ndev);
750 
751         switch (mdp->speed) {
752         case 10: /* 10BASE */
753                 sh_eth_write(ndev, 0x00000000, GECMR);
754                 break;
755         case 100:/* 100BASE */
756                 sh_eth_write(ndev, 0x00000010, GECMR);
757                 break;
758         case 1000: /* 1000BASE */
759                 sh_eth_write(ndev, 0x00000020, GECMR);
760                 break;
761         }
762 }
763 
764 /* SH7757(GETHERC) */
765 static struct sh_eth_cpu_data sh7757_data_giga = {
766         .chip_reset     = sh_eth_chip_reset_giga,
767         .set_duplex     = sh_eth_set_duplex,
768         .set_rate       = sh_eth_set_rate_giga,
769 
770         .register_type  = SH_ETH_REG_GIGABIT,
771 
772         .ecsr_value     = ECSR_ICD | ECSR_MPD,
773         .ecsipr_value   = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
774         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
775 
776         .tx_check       = EESR_TC1 | EESR_FTC,
777         .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
778                           EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
779                           EESR_TDE | EESR_ECI,
780         .fdr_value      = 0x0000072f,
781 
782         .irq_flags      = IRQF_SHARED,
783         .apr            = 1,
784         .mpr            = 1,
785         .tpauser        = 1,
786         .bculr          = 1,
787         .hw_swap        = 1,
788         .rpadir         = 1,
789         .rpadir_value   = 2 << 16,
790         .no_trimd       = 1,
791         .no_ade         = 1,
792         .tsu            = 1,
793 };
794 
795 /* SH7734 */
796 static struct sh_eth_cpu_data sh7734_data = {
797         .chip_reset     = sh_eth_chip_reset,
798         .set_duplex     = sh_eth_set_duplex,
799         .set_rate       = sh_eth_set_rate_gether,
800 
801         .register_type  = SH_ETH_REG_GIGABIT,
802 
803         .ecsr_value     = ECSR_ICD | ECSR_MPD,
804         .ecsipr_value   = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
805         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
806 
807         .tx_check       = EESR_TC1 | EESR_FTC,
808         .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
809                           EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
810                           EESR_TDE | EESR_ECI,
811 
812         .apr            = 1,
813         .mpr            = 1,
814         .tpauser        = 1,
815         .bculr          = 1,
816         .hw_swap        = 1,
817         .no_trimd       = 1,
818         .no_ade         = 1,
819         .tsu            = 1,
820         .hw_crc         = 1,
821         .select_mii     = 1,
822 };
823 
824 /* SH7763 */
825 static struct sh_eth_cpu_data sh7763_data = {
826         .chip_reset     = sh_eth_chip_reset,
827         .set_duplex     = sh_eth_set_duplex,
828         .set_rate       = sh_eth_set_rate_gether,
829 
830         .register_type  = SH_ETH_REG_GIGABIT,
831 
832         .ecsr_value     = ECSR_ICD | ECSR_MPD,
833         .ecsipr_value   = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
834         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
835 
836         .tx_check       = EESR_TC1 | EESR_FTC,
837         .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
838                           EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
839                           EESR_ECI,
840 
841         .apr            = 1,
842         .mpr            = 1,
843         .tpauser        = 1,
844         .bculr          = 1,
845         .hw_swap        = 1,
846         .no_trimd       = 1,
847         .no_ade         = 1,
848         .tsu            = 1,
849         .irq_flags      = IRQF_SHARED,
850 };
851 
852 static struct sh_eth_cpu_data sh7619_data = {
853         .register_type  = SH_ETH_REG_FAST_SH3_SH2,
854 
855         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
856 
857         .apr            = 1,
858         .mpr            = 1,
859         .tpauser        = 1,
860         .hw_swap        = 1,
861 };
862 
863 static struct sh_eth_cpu_data sh771x_data = {
864         .register_type  = SH_ETH_REG_FAST_SH3_SH2,
865 
866         .eesipr_value   = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
867         .tsu            = 1,
868 };
869 
870 static void sh_eth_set_default_cpu_data(struct sh_eth_cpu_data *cd)
871 {
872         if (!cd->ecsr_value)
873                 cd->ecsr_value = DEFAULT_ECSR_INIT;
874 
875         if (!cd->ecsipr_value)
876                 cd->ecsipr_value = DEFAULT_ECSIPR_INIT;
877 
878         if (!cd->fcftr_value)
879                 cd->fcftr_value = DEFAULT_FIFO_F_D_RFF |
880                                   DEFAULT_FIFO_F_D_RFD;
881 
882         if (!cd->fdr_value)
883                 cd->fdr_value = DEFAULT_FDR_INIT;
884 
885         if (!cd->tx_check)
886                 cd->tx_check = DEFAULT_TX_CHECK;
887 
888         if (!cd->eesr_err_check)
889                 cd->eesr_err_check = DEFAULT_EESR_ERR_CHECK;
890 
891         if (!cd->trscer_err_mask)
892                 cd->trscer_err_mask = DEFAULT_TRSCER_ERR_MASK;
893 }
894 
895 static int sh_eth_check_reset(struct net_device *ndev)
896 {
897         int ret = 0;
898         int cnt = 100;
899 
900         while (cnt > 0) {
901                 if (!(sh_eth_read(ndev, EDMR) & EDMR_SRST_GETHER))
902                         break;
903                 mdelay(1);
904                 cnt--;
905         }
906         if (cnt <= 0) {
907                 netdev_err(ndev, "Device reset failed\n");
908                 ret = -ETIMEDOUT;
909         }
910         return ret;
911 }
912 
913 static int sh_eth_reset(struct net_device *ndev)
914 {
915         struct sh_eth_private *mdp = netdev_priv(ndev);
916         int ret = 0;
917 
918         if (sh_eth_is_gether(mdp) || sh_eth_is_rz_fast_ether(mdp)) {
919                 sh_eth_write(ndev, EDSR_ENALL, EDSR);
920                 sh_eth_modify(ndev, EDMR, EDMR_SRST_GETHER, EDMR_SRST_GETHER);
921 
922                 ret = sh_eth_check_reset(ndev);
923                 if (ret)
924                         return ret;
925 
926                 /* Table Init */
927                 sh_eth_write(ndev, 0x0, TDLAR);
928                 sh_eth_write(ndev, 0x0, TDFAR);
929                 sh_eth_write(ndev, 0x0, TDFXR);
930                 sh_eth_write(ndev, 0x0, TDFFR);
931                 sh_eth_write(ndev, 0x0, RDLAR);
932                 sh_eth_write(ndev, 0x0, RDFAR);
933                 sh_eth_write(ndev, 0x0, RDFXR);
934                 sh_eth_write(ndev, 0x0, RDFFR);
935 
936                 /* Reset HW CRC register */
937                 if (mdp->cd->hw_crc)
938                         sh_eth_write(ndev, 0x0, CSMR);
939 
940                 /* Select MII mode */
941                 if (mdp->cd->select_mii)
942                         sh_eth_select_mii(ndev);
943         } else {
944                 sh_eth_modify(ndev, EDMR, EDMR_SRST_ETHER, EDMR_SRST_ETHER);
945                 mdelay(3);
946                 sh_eth_modify(ndev, EDMR, EDMR_SRST_ETHER, 0);
947         }
948 
949         return ret;
950 }
951 
952 static void sh_eth_set_receive_align(struct sk_buff *skb)
953 {
954         uintptr_t reserve = (uintptr_t)skb->data & (SH_ETH_RX_ALIGN - 1);
955 
956         if (reserve)
957                 skb_reserve(skb, SH_ETH_RX_ALIGN - reserve);
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                 u32 mahr = sh_eth_read(ndev, MAHR);
983                 u32 malr = sh_eth_read(ndev, MALR);
984 
985                 ndev->dev_addr[0] = (mahr >> 24) & 0xFF;
986                 ndev->dev_addr[1] = (mahr >> 16) & 0xFF;
987                 ndev->dev_addr[2] = (mahr >>  8) & 0xFF;
988                 ndev->dev_addr[3] = (mahr >>  0) & 0xFF;
989                 ndev->dev_addr[4] = (malr >>  8) & 0xFF;
990                 ndev->dev_addr[5] = (malr >>  0) & 0xFF;
991         }
992 }
993 
994 static u32 sh_eth_get_edtrr_trns(struct sh_eth_private *mdp)
995 {
996         if (sh_eth_is_gether(mdp) || sh_eth_is_rz_fast_ether(mdp))
997                 return EDTRR_TRNS_GETHER;
998         else
999                 return EDTRR_TRNS_ETHER;
1000 }
1001 
1002 struct bb_info {
1003         void (*set_gate)(void *addr);
1004         struct mdiobb_ctrl ctrl;
1005         void *addr;
1006 };
1007 
1008 static void sh_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set)
1009 {
1010         struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
1011         u32 pir;
1012 
1013         if (bitbang->set_gate)
1014                 bitbang->set_gate(bitbang->addr);
1015 
1016         pir = ioread32(bitbang->addr);
1017         if (set)
1018                 pir |=  mask;
1019         else
1020                 pir &= ~mask;
1021         iowrite32(pir, bitbang->addr);
1022 }
1023 
1024 /* Data I/O pin control */
1025 static void sh_mmd_ctrl(struct mdiobb_ctrl *ctrl, int bit)
1026 {
1027         sh_mdio_ctrl(ctrl, PIR_MMD, bit);
1028 }
1029 
1030 /* Set bit data*/
1031 static void sh_set_mdio(struct mdiobb_ctrl *ctrl, int bit)
1032 {
1033         sh_mdio_ctrl(ctrl, PIR_MDO, bit);
1034 }
1035 
1036 /* Get bit data*/
1037 static int sh_get_mdio(struct mdiobb_ctrl *ctrl)
1038 {
1039         struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
1040 
1041         if (bitbang->set_gate)
1042                 bitbang->set_gate(bitbang->addr);
1043 
1044         return (ioread32(bitbang->addr) & PIR_MDI) != 0;
1045 }
1046 
1047 /* MDC pin control */
1048 static void sh_mdc_ctrl(struct mdiobb_ctrl *ctrl, int bit)
1049 {
1050         sh_mdio_ctrl(ctrl, PIR_MDC, bit);
1051 }
1052 
1053 /* mdio bus control struct */
1054 static struct mdiobb_ops bb_ops = {
1055         .owner = THIS_MODULE,
1056         .set_mdc = sh_mdc_ctrl,
1057         .set_mdio_dir = sh_mmd_ctrl,
1058         .set_mdio_data = sh_set_mdio,
1059         .get_mdio_data = sh_get_mdio,
1060 };
1061 
1062 /* free skb and descriptor buffer */
1063 static void sh_eth_ring_free(struct net_device *ndev)
1064 {
1065         struct sh_eth_private *mdp = netdev_priv(ndev);
1066         int ringsize, i;
1067 
1068         /* Free Rx skb ringbuffer */
1069         if (mdp->rx_skbuff) {
1070                 for (i = 0; i < mdp->num_rx_ring; i++)
1071                         dev_kfree_skb(mdp->rx_skbuff[i]);
1072         }
1073         kfree(mdp->rx_skbuff);
1074         mdp->rx_skbuff = NULL;
1075 
1076         /* Free Tx skb ringbuffer */
1077         if (mdp->tx_skbuff) {
1078                 for (i = 0; i < mdp->num_tx_ring; i++)
1079                         dev_kfree_skb(mdp->tx_skbuff[i]);
1080         }
1081         kfree(mdp->tx_skbuff);
1082         mdp->tx_skbuff = NULL;
1083 
1084         if (mdp->rx_ring) {
1085                 ringsize = sizeof(struct sh_eth_rxdesc) * mdp->num_rx_ring;
1086                 dma_free_coherent(NULL, ringsize, mdp->rx_ring,
1087                                   mdp->rx_desc_dma);
1088                 mdp->rx_ring = NULL;
1089         }
1090 
1091         if (mdp->tx_ring) {
1092                 ringsize = sizeof(struct sh_eth_txdesc) * mdp->num_tx_ring;
1093                 dma_free_coherent(NULL, ringsize, mdp->tx_ring,
1094                                   mdp->tx_desc_dma);
1095                 mdp->tx_ring = NULL;
1096         }
1097 }
1098 
1099 /* format skb and descriptor buffer */
1100 static void sh_eth_ring_format(struct net_device *ndev)
1101 {
1102         struct sh_eth_private *mdp = netdev_priv(ndev);
1103         int i;
1104         struct sk_buff *skb;
1105         struct sh_eth_rxdesc *rxdesc = NULL;
1106         struct sh_eth_txdesc *txdesc = NULL;
1107         int rx_ringsize = sizeof(*rxdesc) * mdp->num_rx_ring;
1108         int tx_ringsize = sizeof(*txdesc) * mdp->num_tx_ring;
1109         int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN + 32 - 1;
1110         dma_addr_t dma_addr;
1111         u32 buf_len;
1112 
1113         mdp->cur_rx = 0;
1114         mdp->cur_tx = 0;
1115         mdp->dirty_rx = 0;
1116         mdp->dirty_tx = 0;
1117 
1118         memset(mdp->rx_ring, 0, rx_ringsize);
1119 
1120         /* build Rx ring buffer */
1121         for (i = 0; i < mdp->num_rx_ring; i++) {
1122                 /* skb */
1123                 mdp->rx_skbuff[i] = NULL;
1124                 skb = netdev_alloc_skb(ndev, skbuff_size);
1125                 if (skb == NULL)
1126                         break;
1127                 sh_eth_set_receive_align(skb);
1128 
1129                 /* The size of the buffer is a multiple of 32 bytes. */
1130                 buf_len = ALIGN(mdp->rx_buf_sz, 32);
1131                 dma_addr = dma_map_single(&ndev->dev, skb->data, buf_len,
1132                                           DMA_FROM_DEVICE);
1133                 if (dma_mapping_error(&ndev->dev, dma_addr)) {
1134                         kfree_skb(skb);
1135                         break;
1136                 }
1137                 mdp->rx_skbuff[i] = skb;
1138 
1139                 /* RX descriptor */
1140                 rxdesc = &mdp->rx_ring[i];
1141                 rxdesc->len = cpu_to_le32(buf_len << 16);
1142                 rxdesc->addr = cpu_to_le32(dma_addr);
1143                 rxdesc->status = cpu_to_le32(RD_RACT | RD_RFP);
1144 
1145                 /* Rx descriptor address set */
1146                 if (i == 0) {
1147                         sh_eth_write(ndev, mdp->rx_desc_dma, RDLAR);
1148                         if (sh_eth_is_gether(mdp) ||
1149                             sh_eth_is_rz_fast_ether(mdp))
1150                                 sh_eth_write(ndev, mdp->rx_desc_dma, RDFAR);
1151                 }
1152         }
1153 
1154         mdp->dirty_rx = (u32) (i - mdp->num_rx_ring);
1155 
1156         /* Mark the last entry as wrapping the ring. */
1157         if (rxdesc)
1158                 rxdesc->status |= cpu_to_le32(RD_RDLE);
1159 
1160         memset(mdp->tx_ring, 0, tx_ringsize);
1161 
1162         /* build Tx ring buffer */
1163         for (i = 0; i < mdp->num_tx_ring; i++) {
1164                 mdp->tx_skbuff[i] = NULL;
1165                 txdesc = &mdp->tx_ring[i];
1166                 txdesc->status = cpu_to_le32(TD_TFP);
1167                 txdesc->len = cpu_to_le32(0);
1168                 if (i == 0) {
1169                         /* Tx descriptor address set */
1170                         sh_eth_write(ndev, mdp->tx_desc_dma, TDLAR);
1171                         if (sh_eth_is_gether(mdp) ||
1172                             sh_eth_is_rz_fast_ether(mdp))
1173                                 sh_eth_write(ndev, mdp->tx_desc_dma, TDFAR);
1174                 }
1175         }
1176 
1177         txdesc->status |= cpu_to_le32(TD_TDLE);
1178 }
1179 
1180 /* Get skb and descriptor buffer */
1181 static int sh_eth_ring_init(struct net_device *ndev)
1182 {
1183         struct sh_eth_private *mdp = netdev_priv(ndev);
1184         int rx_ringsize, tx_ringsize;
1185 
1186         /* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
1187          * card needs room to do 8 byte alignment, +2 so we can reserve
1188          * the first 2 bytes, and +16 gets room for the status word from the
1189          * card.
1190          */
1191         mdp->rx_buf_sz = (ndev->mtu <= 1492 ? PKT_BUF_SZ :
1192                           (((ndev->mtu + 26 + 7) & ~7) + 2 + 16));
1193         if (mdp->cd->rpadir)
1194                 mdp->rx_buf_sz += NET_IP_ALIGN;
1195 
1196         /* Allocate RX and TX skb rings */
1197         mdp->rx_skbuff = kcalloc(mdp->num_rx_ring, sizeof(*mdp->rx_skbuff),
1198                                  GFP_KERNEL);
1199         if (!mdp->rx_skbuff)
1200                 return -ENOMEM;
1201 
1202         mdp->tx_skbuff = kcalloc(mdp->num_tx_ring, sizeof(*mdp->tx_skbuff),
1203                                  GFP_KERNEL);
1204         if (!mdp->tx_skbuff)
1205                 goto ring_free;
1206 
1207         /* Allocate all Rx descriptors. */
1208         rx_ringsize = sizeof(struct sh_eth_rxdesc) * mdp->num_rx_ring;
1209         mdp->rx_ring = dma_alloc_coherent(NULL, rx_ringsize, &mdp->rx_desc_dma,
1210                                           GFP_KERNEL);
1211         if (!mdp->rx_ring)
1212                 goto ring_free;
1213 
1214         mdp->dirty_rx = 0;
1215 
1216         /* Allocate all Tx descriptors. */
1217         tx_ringsize = sizeof(struct sh_eth_txdesc) * mdp->num_tx_ring;
1218         mdp->tx_ring = dma_alloc_coherent(NULL, tx_ringsize, &mdp->tx_desc_dma,
1219                                           GFP_KERNEL);
1220         if (!mdp->tx_ring)
1221                 goto ring_free;
1222         return 0;
1223 
1224 ring_free:
1225         /* Free Rx and Tx skb ring buffer and DMA buffer */
1226         sh_eth_ring_free(ndev);
1227 
1228         return -ENOMEM;
1229 }
1230 
1231 static int sh_eth_dev_init(struct net_device *ndev)
1232 {
1233         struct sh_eth_private *mdp = netdev_priv(ndev);
1234         int ret;
1235 
1236         /* Soft Reset */
1237         ret = sh_eth_reset(ndev);
1238         if (ret)
1239                 return ret;
1240 
1241         if (mdp->cd->rmiimode)
1242                 sh_eth_write(ndev, 0x1, RMIIMODE);
1243 
1244         /* Descriptor format */
1245         sh_eth_ring_format(ndev);
1246         if (mdp->cd->rpadir)
1247                 sh_eth_write(ndev, mdp->cd->rpadir_value, RPADIR);
1248 
1249         /* all sh_eth int mask */
1250         sh_eth_write(ndev, 0, EESIPR);
1251 
1252 #if defined(__LITTLE_ENDIAN)
1253         if (mdp->cd->hw_swap)
1254                 sh_eth_write(ndev, EDMR_EL, EDMR);
1255         else
1256 #endif
1257                 sh_eth_write(ndev, 0, EDMR);
1258 
1259         /* FIFO size set */
1260         sh_eth_write(ndev, mdp->cd->fdr_value, FDR);
1261         sh_eth_write(ndev, 0, TFTR);
1262 
1263         /* Frame recv control (enable multiple-packets per rx irq) */
1264         sh_eth_write(ndev, RMCR_RNC, RMCR);
1265 
1266         sh_eth_write(ndev, mdp->cd->trscer_err_mask, TRSCER);
1267 
1268         if (mdp->cd->bculr)
1269                 sh_eth_write(ndev, 0x800, BCULR);       /* Burst sycle set */
1270 
1271         sh_eth_write(ndev, mdp->cd->fcftr_value, FCFTR);
1272 
1273         if (!mdp->cd->no_trimd)
1274                 sh_eth_write(ndev, 0, TRIMD);
1275 
1276         /* Recv frame limit set register */
1277         sh_eth_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN,
1278                      RFLR);
1279 
1280         sh_eth_modify(ndev, EESR, 0, 0);
1281         mdp->irq_enabled = true;
1282         sh_eth_write(ndev, mdp->cd->eesipr_value, EESIPR);
1283 
1284         /* PAUSE Prohibition */
1285         sh_eth_write(ndev, ECMR_ZPF | (mdp->duplex ? ECMR_DM : 0) |
1286                      ECMR_TE | ECMR_RE, ECMR);
1287 
1288         if (mdp->cd->set_rate)
1289                 mdp->cd->set_rate(ndev);
1290 
1291         /* E-MAC Status Register clear */
1292         sh_eth_write(ndev, mdp->cd->ecsr_value, ECSR);
1293 
1294         /* E-MAC Interrupt Enable register */
1295         sh_eth_write(ndev, mdp->cd->ecsipr_value, ECSIPR);
1296 
1297         /* Set MAC address */
1298         update_mac_address(ndev);
1299 
1300         /* mask reset */
1301         if (mdp->cd->apr)
1302                 sh_eth_write(ndev, APR_AP, APR);
1303         if (mdp->cd->mpr)
1304                 sh_eth_write(ndev, MPR_MP, MPR);
1305         if (mdp->cd->tpauser)
1306                 sh_eth_write(ndev, TPAUSER_UNLIMITED, TPAUSER);
1307 
1308         /* Setting the Rx mode will start the Rx process. */
1309         sh_eth_write(ndev, EDRRR_R, EDRRR);
1310 
1311         return ret;
1312 }
1313 
1314 static void sh_eth_dev_exit(struct net_device *ndev)
1315 {
1316         struct sh_eth_private *mdp = netdev_priv(ndev);
1317         int i;
1318 
1319         /* Deactivate all TX descriptors, so DMA should stop at next
1320          * packet boundary if it's currently running
1321          */
1322         for (i = 0; i < mdp->num_tx_ring; i++)
1323                 mdp->tx_ring[i].status &= ~cpu_to_le32(TD_TACT);
1324 
1325         /* Disable TX FIFO egress to MAC */
1326         sh_eth_rcv_snd_disable(ndev);
1327 
1328         /* Stop RX DMA at next packet boundary */
1329         sh_eth_write(ndev, 0, EDRRR);
1330 
1331         /* Aside from TX DMA, we can't tell when the hardware is
1332          * really stopped, so we need to reset to make sure.
1333          * Before doing that, wait for long enough to *probably*
1334          * finish transmitting the last packet and poll stats.
1335          */
1336         msleep(2); /* max frame time at 10 Mbps < 1250 us */
1337         sh_eth_get_stats(ndev);
1338         sh_eth_reset(ndev);
1339 
1340         /* Set MAC address again */
1341         update_mac_address(ndev);
1342 }
1343 
1344 /* free Tx skb function */
1345 static int sh_eth_txfree(struct net_device *ndev)
1346 {
1347         struct sh_eth_private *mdp = netdev_priv(ndev);
1348         struct sh_eth_txdesc *txdesc;
1349         int free_num = 0;
1350         int entry;
1351 
1352         for (; mdp->cur_tx - mdp->dirty_tx > 0; mdp->dirty_tx++) {
1353                 entry = mdp->dirty_tx % mdp->num_tx_ring;
1354                 txdesc = &mdp->tx_ring[entry];
1355                 if (txdesc->status & cpu_to_le32(TD_TACT))
1356                         break;
1357                 /* TACT bit must be checked before all the following reads */
1358                 dma_rmb();
1359                 netif_info(mdp, tx_done, ndev,
1360                            "tx entry %d status 0x%08x\n",
1361                            entry, le32_to_cpu(txdesc->status));
1362                 /* Free the original skb. */
1363                 if (mdp->tx_skbuff[entry]) {
1364                         dma_unmap_single(&ndev->dev, le32_to_cpu(txdesc->addr),
1365                                          le32_to_cpu(txdesc->len) >> 16,
1366                                          DMA_TO_DEVICE);
1367                         dev_kfree_skb_irq(mdp->tx_skbuff[entry]);
1368                         mdp->tx_skbuff[entry] = NULL;
1369                         free_num++;
1370                 }
1371                 txdesc->status = cpu_to_le32(TD_TFP);
1372                 if (entry >= mdp->num_tx_ring - 1)
1373                         txdesc->status |= cpu_to_le32(TD_TDLE);
1374 
1375                 ndev->stats.tx_packets++;
1376                 ndev->stats.tx_bytes += le32_to_cpu(txdesc->len) >> 16;
1377         }
1378         return free_num;
1379 }
1380 
1381 /* Packet receive function */
1382 static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
1383 {
1384         struct sh_eth_private *mdp = netdev_priv(ndev);
1385         struct sh_eth_rxdesc *rxdesc;
1386 
1387         int entry = mdp->cur_rx % mdp->num_rx_ring;
1388         int boguscnt = (mdp->dirty_rx + mdp->num_rx_ring) - mdp->cur_rx;
1389         int limit;
1390         struct sk_buff *skb;
1391         u32 desc_status;
1392         int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN + 32 - 1;
1393         dma_addr_t dma_addr;
1394         u16 pkt_len;
1395         u32 buf_len;
1396 
1397         boguscnt = min(boguscnt, *quota);
1398         limit = boguscnt;
1399         rxdesc = &mdp->rx_ring[entry];
1400         while (!(rxdesc->status & cpu_to_le32(RD_RACT))) {
1401                 /* RACT bit must be checked before all the following reads */
1402                 dma_rmb();
1403                 desc_status = le32_to_cpu(rxdesc->status);
1404                 pkt_len = le32_to_cpu(rxdesc->len) & RD_RFL;
1405 
1406                 if (--boguscnt < 0)
1407                         break;
1408 
1409                 netif_info(mdp, rx_status, ndev,
1410                            "rx entry %d status 0x%08x len %d\n",
1411                            entry, desc_status, pkt_len);
1412 
1413                 if (!(desc_status & RDFEND))
1414                         ndev->stats.rx_length_errors++;
1415 
1416                 /* In case of almost all GETHER/ETHERs, the Receive Frame State
1417                  * (RFS) bits in the Receive Descriptor 0 are from bit 9 to
1418                  * bit 0. However, in case of the R8A7740 and R7S72100
1419                  * the RFS bits are from bit 25 to bit 16. So, the
1420                  * driver needs right shifting by 16.
1421                  */
1422                 if (mdp->cd->shift_rd0)
1423                         desc_status >>= 16;
1424 
1425                 skb = mdp->rx_skbuff[entry];
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  if (skb) {
1442                         dma_addr = le32_to_cpu(rxdesc->addr);
1443                         if (!mdp->cd->hw_swap)
1444                                 sh_eth_soft_swap(
1445                                         phys_to_virt(ALIGN(dma_addr, 4)),
1446                                         pkt_len + 2);
1447                         mdp->rx_skbuff[entry] = NULL;
1448                         if (mdp->cd->rpadir)
1449                                 skb_reserve(skb, NET_IP_ALIGN);
1450                         dma_unmap_single(&ndev->dev, dma_addr,
1451                                          ALIGN(mdp->rx_buf_sz, 32),
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                         if (desc_status & RD_RFS8)
1459                                 ndev->stats.multicast++;
1460                 }
1461                 entry = (++mdp->cur_rx) % mdp->num_rx_ring;
1462                 rxdesc = &mdp->rx_ring[entry];
1463         }
1464 
1465         /* Refill the Rx ring buffers. */
1466         for (; mdp->cur_rx - mdp->dirty_rx > 0; mdp->dirty_rx++) {
1467                 entry = mdp->dirty_rx % mdp->num_rx_ring;
1468                 rxdesc = &mdp->rx_ring[entry];
1469                 /* The size of the buffer is 32 byte boundary. */
1470                 buf_len = ALIGN(mdp->rx_buf_sz, 32);
1471                 rxdesc->len = cpu_to_le32(buf_len << 16);
1472 
1473                 if (mdp->rx_skbuff[entry] == NULL) {
1474                         skb = netdev_alloc_skb(ndev, skbuff_size);
1475                         if (skb == NULL)
1476                                 break;  /* Better luck next round. */
1477                         sh_eth_set_receive_align(skb);
1478                         dma_addr = dma_map_single(&ndev->dev, skb->data,
1479                                                   buf_len, DMA_FROM_DEVICE);
1480                         if (dma_mapping_error(&ndev->dev, dma_addr)) {
1481                                 kfree_skb(skb);
1482                                 break;
1483                         }
1484                         mdp->rx_skbuff[entry] = skb;
1485 
1486                         skb_checksum_none_assert(skb);
1487                         rxdesc->addr = cpu_to_le32(dma_addr);
1488                 }
1489                 dma_wmb(); /* RACT bit must be set after all the above writes */
1490                 if (entry >= mdp->num_rx_ring - 1)
1491                         rxdesc->status |=
1492                                 cpu_to_le32(RD_RACT | RD_RFP | RD_RDLE);
1493                 else
1494                         rxdesc->status |= cpu_to_le32(RD_RACT | RD_RFP);
1495         }
1496 
1497         /* Restart Rx engine if stopped. */
1498         /* If we don't need to check status, don't. -KDU */
1499         if (!(sh_eth_read(ndev, EDRRR) & EDRRR_R)) {
1500                 /* fix the values for the next receiving if RDE is set */
1501                 if (intr_status & EESR_RDE &&
1502                     mdp->reg_offset[RDFAR] != SH_ETH_OFFSET_INVALID) {
1503                         u32 count = (sh_eth_read(ndev, RDFAR) -
1504                                      sh_eth_read(ndev, RDLAR)) >> 4;
1505 
1506                         mdp->cur_rx = count;
1507                         mdp->dirty_rx = count;
1508                 }
1509                 sh_eth_write(ndev, EDRRR_R, EDRRR);
1510         }
1511 
1512         *quota -= limit - boguscnt - 1;
1513 
1514         return *quota <= 0;
1515 }
1516 
1517 static void sh_eth_rcv_snd_disable(struct net_device *ndev)
1518 {
1519         /* disable tx and rx */
1520         sh_eth_modify(ndev, ECMR, ECMR_RE | ECMR_TE, 0);
1521 }
1522 
1523 static void sh_eth_rcv_snd_enable(struct net_device *ndev)
1524 {
1525         /* enable tx and rx */
1526         sh_eth_modify(ndev, ECMR, ECMR_RE | ECMR_TE, ECMR_RE | ECMR_TE);
1527 }
1528 
1529 /* error control function */
1530 static void sh_eth_error(struct net_device *ndev, u32 intr_status)
1531 {
1532         struct sh_eth_private *mdp = netdev_priv(ndev);
1533         u32 felic_stat;
1534         u32 link_stat;
1535         u32 mask;
1536 
1537         if (intr_status & EESR_ECI) {
1538                 felic_stat = sh_eth_read(ndev, ECSR);
1539                 sh_eth_write(ndev, felic_stat, ECSR);   /* clear int */
1540                 if (felic_stat & ECSR_ICD)
1541                         ndev->stats.tx_carrier_errors++;
1542                 if (felic_stat & ECSR_LCHNG) {
1543                         /* Link Changed */
1544                         if (mdp->cd->no_psr || mdp->no_ether_link) {
1545                                 goto ignore_link;
1546                         } else {
1547                                 link_stat = (sh_eth_read(ndev, PSR));
1548                                 if (mdp->ether_link_active_low)
1549                                         link_stat = ~link_stat;
1550                         }
1551                         if (!(link_stat & PHY_ST_LINK)) {
1552                                 sh_eth_rcv_snd_disable(ndev);
1553                         } else {
1554                                 /* Link Up */
1555                                 sh_eth_modify(ndev, EESIPR, DMAC_M_ECI, 0);
1556                                 /* clear int */
1557                                 sh_eth_modify(ndev, ECSR, 0, 0);
1558                                 sh_eth_modify(ndev, EESIPR, DMAC_M_ECI,
1559                                               DMAC_M_ECI);
1560                                 /* enable tx and rx */
1561                                 sh_eth_rcv_snd_enable(ndev);
1562                         }
1563                 }
1564         }
1565 
1566 ignore_link:
1567         if (intr_status & EESR_TWB) {
1568                 /* Unused write back interrupt */
1569                 if (intr_status & EESR_TABT) {  /* Transmit Abort int */
1570                         ndev->stats.tx_aborted_errors++;
1571                         netif_err(mdp, tx_err, ndev, "Transmit Abort\n");
1572                 }
1573         }
1574 
1575         if (intr_status & EESR_RABT) {
1576                 /* Receive Abort int */
1577                 if (intr_status & EESR_RFRMER) {
1578                         /* Receive Frame Overflow int */
1579                         ndev->stats.rx_frame_errors++;
1580                 }
1581         }
1582 
1583         if (intr_status & EESR_TDE) {
1584                 /* Transmit Descriptor Empty int */
1585                 ndev->stats.tx_fifo_errors++;
1586                 netif_err(mdp, tx_err, ndev, "Transmit Descriptor Empty\n");
1587         }
1588 
1589         if (intr_status & EESR_TFE) {
1590                 /* FIFO under flow */
1591                 ndev->stats.tx_fifo_errors++;
1592                 netif_err(mdp, tx_err, ndev, "Transmit FIFO Under flow\n");
1593         }
1594 
1595         if (intr_status & EESR_RDE) {
1596                 /* Receive Descriptor Empty int */
1597                 ndev->stats.rx_over_errors++;
1598         }
1599 
1600         if (intr_status & EESR_RFE) {
1601                 /* Receive FIFO Overflow int */
1602                 ndev->stats.rx_fifo_errors++;
1603         }
1604 
1605         if (!mdp->cd->no_ade && (intr_status & EESR_ADE)) {
1606                 /* Address Error */
1607                 ndev->stats.tx_fifo_errors++;
1608                 netif_err(mdp, tx_err, ndev, "Address Error\n");
1609         }
1610 
1611         mask = EESR_TWB | EESR_TABT | EESR_ADE | EESR_TDE | EESR_TFE;
1612         if (mdp->cd->no_ade)
1613                 mask &= ~EESR_ADE;
1614         if (intr_status & mask) {
1615                 /* Tx error */
1616                 u32 edtrr = sh_eth_read(ndev, EDTRR);
1617 
1618                 /* dmesg */
1619                 netdev_err(ndev, "TX error. status=%8.8x cur_tx=%8.8x dirty_tx=%8.8x state=%8.8x EDTRR=%8.8x.\n",
1620                            intr_status, mdp->cur_tx, mdp->dirty_tx,
1621                            (u32)ndev->state, edtrr);
1622                 /* dirty buffer free */
1623                 sh_eth_txfree(ndev);
1624 
1625                 /* SH7712 BUG */
1626                 if (edtrr ^ sh_eth_get_edtrr_trns(mdp)) {
1627                         /* tx dma start */
1628                         sh_eth_write(ndev, sh_eth_get_edtrr_trns(mdp), EDTRR);
1629                 }
1630                 /* wakeup */
1631                 netif_wake_queue(ndev);
1632         }
1633 }
1634 
1635 static irqreturn_t sh_eth_interrupt(int irq, void *netdev)
1636 {
1637         struct net_device *ndev = netdev;
1638         struct sh_eth_private *mdp = netdev_priv(ndev);
1639         struct sh_eth_cpu_data *cd = mdp->cd;
1640         irqreturn_t ret = IRQ_NONE;
1641         u32 intr_status, intr_enable;
1642 
1643         spin_lock(&mdp->lock);
1644 
1645         /* Get interrupt status */
1646         intr_status = sh_eth_read(ndev, EESR);
1647         /* Mask it with the interrupt mask, forcing ECI interrupt to be always
1648          * enabled since it's the one that  comes thru regardless of the mask,
1649          * and we need to fully handle it in sh_eth_error() in order to quench
1650          * it as it doesn't get cleared by just writing 1 to the ECI bit...
1651          */
1652         intr_enable = sh_eth_read(ndev, EESIPR);
1653         intr_status &= intr_enable | DMAC_M_ECI;
1654         if (intr_status & (EESR_RX_CHECK | cd->tx_check | cd->eesr_err_check))
1655                 ret = IRQ_HANDLED;
1656         else
1657                 goto out;
1658 
1659         if (!likely(mdp->irq_enabled)) {
1660                 sh_eth_write(ndev, 0, EESIPR);
1661                 goto out;
1662         }
1663 
1664         if (intr_status & EESR_RX_CHECK) {
1665                 if (napi_schedule_prep(&mdp->napi)) {
1666                         /* Mask Rx interrupts */
1667                         sh_eth_write(ndev, intr_enable & ~EESR_RX_CHECK,
1668                                      EESIPR);
1669                         __napi_schedule(&mdp->napi);
1670                 } else {
1671                         netdev_warn(ndev,
1672                                     "ignoring interrupt, status 0x%08x, mask 0x%08x.\n",
1673                                     intr_status, intr_enable);
1674                 }
1675         }
1676 
1677         /* Tx Check */
1678         if (intr_status & cd->tx_check) {
1679                 /* Clear Tx interrupts */
1680                 sh_eth_write(ndev, intr_status & cd->tx_check, EESR);
1681 
1682                 sh_eth_txfree(ndev);
1683                 netif_wake_queue(ndev);
1684         }
1685 
1686         if (intr_status & cd->eesr_err_check) {
1687                 /* Clear error interrupts */
1688                 sh_eth_write(ndev, intr_status & cd->eesr_err_check, EESR);
1689 
1690                 sh_eth_error(ndev, intr_status);
1691         }
1692 
1693 out:
1694         spin_unlock(&mdp->lock);
1695 
1696         return ret;
1697 }
1698 
1699 static int sh_eth_poll(struct napi_struct *napi, int budget)
1700 {
1701         struct sh_eth_private *mdp = container_of(napi, struct sh_eth_private,
1702                                                   napi);
1703         struct net_device *ndev = napi->dev;
1704         int quota = budget;
1705         u32 intr_status;
1706 
1707         for (;;) {
1708                 intr_status = sh_eth_read(ndev, EESR);
1709                 if (!(intr_status & EESR_RX_CHECK))
1710                         break;
1711                 /* Clear Rx interrupts */
1712                 sh_eth_write(ndev, intr_status & EESR_RX_CHECK, EESR);
1713 
1714                 if (sh_eth_rx(ndev, intr_status, &quota))
1715                         goto out;
1716         }
1717 
1718         napi_complete(napi);
1719 
1720         /* Reenable Rx interrupts */
1721         if (mdp->irq_enabled)
1722                 sh_eth_write(ndev, mdp->cd->eesipr_value, EESIPR);
1723 out:
1724         return budget - quota;
1725 }
1726 
1727 /* PHY state control function */
1728 static void sh_eth_adjust_link(struct net_device *ndev)
1729 {
1730         struct sh_eth_private *mdp = netdev_priv(ndev);
1731         struct phy_device *phydev = ndev->phydev;
1732         int new_state = 0;
1733 
1734         if (phydev->link) {
1735                 if (phydev->duplex != mdp->duplex) {
1736                         new_state = 1;
1737                         mdp->duplex = phydev->duplex;
1738                         if (mdp->cd->set_duplex)
1739                                 mdp->cd->set_duplex(ndev);
1740                 }
1741 
1742                 if (phydev->speed != mdp->speed) {
1743                         new_state = 1;
1744                         mdp->speed = phydev->speed;
1745                         if (mdp->cd->set_rate)
1746                                 mdp->cd->set_rate(ndev);
1747                 }
1748                 if (!mdp->link) {
1749                         sh_eth_modify(ndev, ECMR, ECMR_TXF, 0);
1750                         new_state = 1;
1751                         mdp->link = phydev->link;
1752                         if (mdp->cd->no_psr || mdp->no_ether_link)
1753                                 sh_eth_rcv_snd_enable(ndev);
1754                 }
1755         } else if (mdp->link) {
1756                 new_state = 1;
1757                 mdp->link = 0;
1758                 mdp->speed = 0;
1759                 mdp->duplex = -1;
1760                 if (mdp->cd->no_psr || mdp->no_ether_link)
1761                         sh_eth_rcv_snd_disable(ndev);
1762         }
1763 
1764         if (new_state && netif_msg_link(mdp))
1765                 phy_print_status(phydev);
1766 }
1767 
1768 /* PHY init function */
1769 static int sh_eth_phy_init(struct net_device *ndev)
1770 {
1771         struct device_node *np = ndev->dev.parent->of_node;
1772         struct sh_eth_private *mdp = netdev_priv(ndev);
1773         struct phy_device *phydev;
1774 
1775         mdp->link = 0;
1776         mdp->speed = 0;
1777         mdp->duplex = -1;
1778 
1779         /* Try connect to PHY */
1780         if (np) {
1781                 struct device_node *pn;
1782 
1783                 pn = of_parse_phandle(np, "phy-handle", 0);
1784                 phydev = of_phy_connect(ndev, pn,
1785                                         sh_eth_adjust_link, 0,
1786                                         mdp->phy_interface);
1787 
1788                 of_node_put(pn);
1789                 if (!phydev)
1790                         phydev = ERR_PTR(-ENOENT);
1791         } else {
1792                 char phy_id[MII_BUS_ID_SIZE + 3];
1793 
1794                 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
1795                          mdp->mii_bus->id, mdp->phy_id);
1796 
1797                 phydev = phy_connect(ndev, phy_id, sh_eth_adjust_link,
1798                                      mdp->phy_interface);
1799         }
1800 
1801         if (IS_ERR(phydev)) {
1802                 netdev_err(ndev, "failed to connect PHY\n");
1803                 return PTR_ERR(phydev);
1804         }
1805 
1806         phy_attached_info(phydev);
1807 
1808         return 0;
1809 }
1810 
1811 /* PHY control start function */
1812 static int sh_eth_phy_start(struct net_device *ndev)
1813 {
1814         int ret;
1815 
1816         ret = sh_eth_phy_init(ndev);
1817         if (ret)
1818                 return ret;
1819 
1820         phy_start(ndev->phydev);
1821 
1822         return 0;
1823 }
1824 
1825 static int sh_eth_get_link_ksettings(struct net_device *ndev,
1826                                      struct ethtool_link_ksettings *cmd)
1827 {
1828         struct sh_eth_private *mdp = netdev_priv(ndev);
1829         unsigned long flags;
1830         int ret;
1831 
1832         if (!ndev->phydev)
1833                 return -ENODEV;
1834 
1835         spin_lock_irqsave(&mdp->lock, flags);
1836         ret = phy_ethtool_ksettings_get(ndev->phydev, cmd);
1837         spin_unlock_irqrestore(&mdp->lock, flags);
1838 
1839         return ret;
1840 }
1841 
1842 static int sh_eth_set_link_ksettings(struct net_device *ndev,
1843                                      const struct ethtool_link_ksettings *cmd)
1844 {
1845         struct sh_eth_private *mdp = netdev_priv(ndev);
1846         unsigned long flags;
1847         int ret;
1848 
1849         if (!ndev->phydev)
1850                 return -ENODEV;
1851 
1852         spin_lock_irqsave(&mdp->lock, flags);
1853 
1854         /* disable tx and rx */
1855         sh_eth_rcv_snd_disable(ndev);
1856 
1857         ret = phy_ethtool_ksettings_set(ndev->phydev, cmd);
1858         if (ret)
1859                 goto error_exit;
1860 
1861         if (cmd->base.duplex == DUPLEX_FULL)
1862                 mdp->duplex = 1;
1863         else
1864                 mdp->duplex = 0;
1865 
1866         if (mdp->cd->set_duplex)
1867                 mdp->cd->set_duplex(ndev);
1868 
1869 error_exit:
1870         mdelay(1);
1871 
1872         /* enable tx and rx */
1873         sh_eth_rcv_snd_enable(ndev);
1874 
1875         spin_unlock_irqrestore(&mdp->lock, flags);
1876 
1877         return ret;
1878 }
1879 
1880 /* If it is ever necessary to increase SH_ETH_REG_DUMP_MAX_REGS, the
1881  * version must be bumped as well.  Just adding registers up to that
1882  * limit is fine, as long as the existing register indices don't
1883  * change.
1884  */
1885 #define SH_ETH_REG_DUMP_VERSION         1
1886 #define SH_ETH_REG_DUMP_MAX_REGS        256
1887 
1888 static size_t __sh_eth_get_regs(struct net_device *ndev, u32 *buf)
1889 {
1890         struct sh_eth_private *mdp = netdev_priv(ndev);
1891         struct sh_eth_cpu_data *cd = mdp->cd;
1892         u32 *valid_map;
1893         size_t len;
1894 
1895         BUILD_BUG_ON(SH_ETH_MAX_REGISTER_OFFSET > SH_ETH_REG_DUMP_MAX_REGS);
1896 
1897         /* Dump starts with a bitmap that tells ethtool which
1898          * registers are defined for this chip.
1899          */
1900         len = DIV_ROUND_UP(SH_ETH_REG_DUMP_MAX_REGS, 32);
1901         if (buf) {
1902                 valid_map = buf;
1903                 buf += len;
1904         } else {
1905                 valid_map = NULL;
1906         }
1907 
1908         /* Add a register to the dump, if it has a defined offset.
1909          * This automatically skips most undefined registers, but for
1910          * some it is also necessary to check a capability flag in
1911          * struct sh_eth_cpu_data.
1912          */
1913 #define mark_reg_valid(reg) valid_map[reg / 32] |= 1U << (reg % 32)
1914 #define add_reg_from(reg, read_expr) do {                               \
1915                 if (mdp->reg_offset[reg] != SH_ETH_OFFSET_INVALID) {    \
1916                         if (buf) {                                      \
1917                                 mark_reg_valid(reg);                    \
1918                                 *buf++ = read_expr;                     \
1919                         }                                               \
1920                         ++len;                                          \
1921                 }                                                       \
1922         } while (0)
1923 #define add_reg(reg) add_reg_from(reg, sh_eth_read(ndev, reg))
1924 #define add_tsu_reg(reg) add_reg_from(reg, sh_eth_tsu_read(mdp, reg))
1925 
1926         add_reg(EDSR);
1927         add_reg(EDMR);
1928         add_reg(EDTRR);
1929         add_reg(EDRRR);
1930         add_reg(EESR);
1931         add_reg(EESIPR);
1932         add_reg(TDLAR);
1933         add_reg(TDFAR);
1934         add_reg(TDFXR);
1935         add_reg(TDFFR);
1936         add_reg(RDLAR);
1937         add_reg(RDFAR);
1938         add_reg(RDFXR);
1939         add_reg(RDFFR);
1940         add_reg(TRSCER);
1941         add_reg(RMFCR);
1942         add_reg(TFTR);
1943         add_reg(FDR);
1944         add_reg(RMCR);
1945         add_reg(TFUCR);
1946         add_reg(RFOCR);
1947         if (cd->rmiimode)
1948                 add_reg(RMIIMODE);
1949         add_reg(FCFTR);
1950         if (cd->rpadir)
1951                 add_reg(RPADIR);
1952         if (!cd->no_trimd)
1953                 add_reg(TRIMD);
1954         add_reg(ECMR);
1955         add_reg(ECSR);
1956         add_reg(ECSIPR);
1957         add_reg(PIR);
1958         if (!cd->no_psr)
1959                 add_reg(PSR);
1960         add_reg(RDMLR);
1961         add_reg(RFLR);
1962         add_reg(IPGR);
1963         if (cd->apr)
1964                 add_reg(APR);
1965         if (cd->mpr)
1966                 add_reg(MPR);
1967         add_reg(RFCR);
1968         add_reg(RFCF);
1969         if (cd->tpauser)
1970                 add_reg(TPAUSER);
1971         add_reg(TPAUSECR);
1972         add_reg(GECMR);
1973         if (cd->bculr)
1974                 add_reg(BCULR);
1975         add_reg(MAHR);
1976         add_reg(MALR);
1977         add_reg(TROCR);
1978         add_reg(CDCR);
1979         add_reg(LCCR);
1980         add_reg(CNDCR);
1981         add_reg(CEFCR);
1982         add_reg(FRECR);
1983         add_reg(TSFRCR);
1984         add_reg(TLFRCR);
1985         add_reg(CERCR);
1986         add_reg(CEECR);
1987         add_reg(MAFCR);
1988         if (cd->rtrate)
1989                 add_reg(RTRATE);
1990         if (cd->hw_crc)
1991                 add_reg(CSMR);
1992         if (cd->select_mii)
1993                 add_reg(RMII_MII);
1994         add_reg(ARSTR);
1995         if (cd->tsu) {
1996                 add_tsu_reg(TSU_CTRST);
1997                 add_tsu_reg(TSU_FWEN0);
1998                 add_tsu_reg(TSU_FWEN1);
1999                 add_tsu_reg(TSU_FCM);
2000                 add_tsu_reg(TSU_BSYSL0);
2001                 add_tsu_reg(TSU_BSYSL1);
2002                 add_tsu_reg(TSU_PRISL0);
2003                 add_tsu_reg(TSU_PRISL1);
2004                 add_tsu_reg(TSU_FWSL0);
2005                 add_tsu_reg(TSU_FWSL1);
2006                 add_tsu_reg(TSU_FWSLC);
2007                 add_tsu_reg(TSU_QTAG0);
2008                 add_tsu_reg(TSU_QTAG1);
2009                 add_tsu_reg(TSU_QTAGM0);
2010                 add_tsu_reg(TSU_QTAGM1);
2011                 add_tsu_reg(TSU_FWSR);
2012                 add_tsu_reg(TSU_FWINMK);
2013                 add_tsu_reg(TSU_ADQT0);
2014                 add_tsu_reg(TSU_ADQT1);
2015                 add_tsu_reg(TSU_VTAG0);
2016                 add_tsu_reg(TSU_VTAG1);
2017                 add_tsu_reg(TSU_ADSBSY);
2018                 add_tsu_reg(TSU_TEN);
2019                 add_tsu_reg(TSU_POST1);
2020                 add_tsu_reg(TSU_POST2);
2021                 add_tsu_reg(TSU_POST3);
2022                 add_tsu_reg(TSU_POST4);
2023                 if (mdp->reg_offset[TSU_ADRH0] != SH_ETH_OFFSET_INVALID) {
2024                         /* This is the start of a table, not just a single
2025                          * register.
2026                          */
2027                         if (buf) {
2028                                 unsigned int i;
2029 
2030                                 mark_reg_valid(TSU_ADRH0);
2031                                 for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES * 2; i++)
2032                                         *buf++ = ioread32(
2033                                                 mdp->tsu_addr +
2034                                                 mdp->reg_offset[TSU_ADRH0] +
2035                                                 i * 4);
2036                         }
2037                         len += SH_ETH_TSU_CAM_ENTRIES * 2;
2038                 }
2039         }
2040 
2041 #undef mark_reg_valid
2042 #undef add_reg_from
2043 #undef add_reg
2044 #undef add_tsu_reg
2045 
2046         return len * 4;
2047 }
2048 
2049 static int sh_eth_get_regs_len(struct net_device *ndev)
2050 {
2051         return __sh_eth_get_regs(ndev, NULL);
2052 }
2053 
2054 static void sh_eth_get_regs(struct net_device *ndev, struct ethtool_regs *regs,
2055                             void *buf)
2056 {
2057         struct sh_eth_private *mdp = netdev_priv(ndev);
2058 
2059         regs->version = SH_ETH_REG_DUMP_VERSION;
2060 
2061         pm_runtime_get_sync(&mdp->pdev->dev);
2062         __sh_eth_get_regs(ndev, buf);
2063         pm_runtime_put_sync(&mdp->pdev->dev);
2064 }
2065 
2066 static int sh_eth_nway_reset(struct net_device *ndev)
2067 {
2068         struct sh_eth_private *mdp = netdev_priv(ndev);
2069         unsigned long flags;
2070         int ret;
2071 
2072         if (!ndev->phydev)
2073                 return -ENODEV;
2074 
2075         spin_lock_irqsave(&mdp->lock, flags);
2076         ret = phy_start_aneg(ndev->phydev);
2077         spin_unlock_irqrestore(&mdp->lock, flags);
2078 
2079         return ret;
2080 }
2081 
2082 static u32 sh_eth_get_msglevel(struct net_device *ndev)
2083 {
2084         struct sh_eth_private *mdp = netdev_priv(ndev);
2085         return mdp->msg_enable;
2086 }
2087 
2088 static void sh_eth_set_msglevel(struct net_device *ndev, u32 value)
2089 {
2090         struct sh_eth_private *mdp = netdev_priv(ndev);
2091         mdp->msg_enable = value;
2092 }
2093 
2094 static const char sh_eth_gstrings_stats[][ETH_GSTRING_LEN] = {
2095         "rx_current", "tx_current",
2096         "rx_dirty", "tx_dirty",
2097 };
2098 #define SH_ETH_STATS_LEN  ARRAY_SIZE(sh_eth_gstrings_stats)
2099 
2100 static int sh_eth_get_sset_count(struct net_device *netdev, int sset)
2101 {
2102         switch (sset) {
2103         case ETH_SS_STATS:
2104                 return SH_ETH_STATS_LEN;
2105         default:
2106                 return -EOPNOTSUPP;
2107         }
2108 }
2109 
2110 static void sh_eth_get_ethtool_stats(struct net_device *ndev,
2111                                      struct ethtool_stats *stats, u64 *data)
2112 {
2113         struct sh_eth_private *mdp = netdev_priv(ndev);
2114         int i = 0;
2115 
2116         /* device-specific stats */
2117         data[i++] = mdp->cur_rx;
2118         data[i++] = mdp->cur_tx;
2119         data[i++] = mdp->dirty_rx;
2120         data[i++] = mdp->dirty_tx;
2121 }
2122 
2123 static void sh_eth_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
2124 {
2125         switch (stringset) {
2126         case ETH_SS_STATS:
2127                 memcpy(data, *sh_eth_gstrings_stats,
2128                        sizeof(sh_eth_gstrings_stats));
2129                 break;
2130         }
2131 }
2132 
2133 static void sh_eth_get_ringparam(struct net_device *ndev,
2134                                  struct ethtool_ringparam *ring)
2135 {
2136         struct sh_eth_private *mdp = netdev_priv(ndev);
2137 
2138         ring->rx_max_pending = RX_RING_MAX;
2139         ring->tx_max_pending = TX_RING_MAX;
2140         ring->rx_pending = mdp->num_rx_ring;
2141         ring->tx_pending = mdp->num_tx_ring;
2142 }
2143 
2144 static int sh_eth_set_ringparam(struct net_device *ndev,
2145                                 struct ethtool_ringparam *ring)
2146 {
2147         struct sh_eth_private *mdp = netdev_priv(ndev);
2148         int ret;
2149 
2150         if (ring->tx_pending > TX_RING_MAX ||
2151             ring->rx_pending > RX_RING_MAX ||
2152             ring->tx_pending < TX_RING_MIN ||
2153             ring->rx_pending < RX_RING_MIN)
2154                 return -EINVAL;
2155         if (ring->rx_mini_pending || ring->rx_jumbo_pending)
2156                 return -EINVAL;
2157 
2158         if (netif_running(ndev)) {
2159                 netif_device_detach(ndev);
2160                 netif_tx_disable(ndev);
2161 
2162                 /* Serialise with the interrupt handler and NAPI, then
2163                  * disable interrupts.  We have to clear the
2164                  * irq_enabled flag first to ensure that interrupts
2165                  * won't be re-enabled.
2166                  */
2167                 mdp->irq_enabled = false;
2168                 synchronize_irq(ndev->irq);
2169                 napi_synchronize(&mdp->napi);
2170                 sh_eth_write(ndev, 0x0000, EESIPR);
2171 
2172                 sh_eth_dev_exit(ndev);
2173 
2174                 /* Free all the skbuffs in the Rx queue and the DMA buffers. */
2175                 sh_eth_ring_free(ndev);
2176         }
2177 
2178         /* Set new parameters */
2179         mdp->num_rx_ring = ring->rx_pending;
2180         mdp->num_tx_ring = ring->tx_pending;
2181 
2182         if (netif_running(ndev)) {
2183                 ret = sh_eth_ring_init(ndev);
2184                 if (ret < 0) {
2185                         netdev_err(ndev, "%s: sh_eth_ring_init failed.\n",
2186                                    __func__);
2187                         return ret;
2188                 }
2189                 ret = sh_eth_dev_init(ndev);
2190                 if (ret < 0) {
2191                         netdev_err(ndev, "%s: sh_eth_dev_init failed.\n",
2192                                    __func__);
2193                         return ret;
2194                 }
2195 
2196                 netif_device_attach(ndev);
2197         }
2198 
2199         return 0;
2200 }
2201 
2202 static const struct ethtool_ops sh_eth_ethtool_ops = {
2203         .get_regs_len   = sh_eth_get_regs_len,
2204         .get_regs       = sh_eth_get_regs,
2205         .nway_reset     = sh_eth_nway_reset,
2206         .get_msglevel   = sh_eth_get_msglevel,
2207         .set_msglevel   = sh_eth_set_msglevel,
2208         .get_link       = ethtool_op_get_link,
2209         .get_strings    = sh_eth_get_strings,
2210         .get_ethtool_stats  = sh_eth_get_ethtool_stats,
2211         .get_sset_count     = sh_eth_get_sset_count,
2212         .get_ringparam  = sh_eth_get_ringparam,
2213         .set_ringparam  = sh_eth_set_ringparam,
2214         .get_link_ksettings = sh_eth_get_link_ksettings,
2215         .set_link_ksettings = sh_eth_set_link_ksettings,
2216 };
2217 
2218 /* network device open function */
2219 static int sh_eth_open(struct net_device *ndev)
2220 {
2221         struct sh_eth_private *mdp = netdev_priv(ndev);
2222         int ret;
2223 
2224         pm_runtime_get_sync(&mdp->pdev->dev);
2225 
2226         napi_enable(&mdp->napi);
2227 
2228         ret = request_irq(ndev->irq, sh_eth_interrupt,
2229                           mdp->cd->irq_flags, ndev->name, ndev);
2230         if (ret) {
2231                 netdev_err(ndev, "Can not assign IRQ number\n");
2232                 goto out_napi_off;
2233         }
2234 
2235         /* Descriptor set */
2236         ret = sh_eth_ring_init(ndev);
2237         if (ret)
2238                 goto out_free_irq;
2239 
2240         /* device init */
2241         ret = sh_eth_dev_init(ndev);
2242         if (ret)
2243                 goto out_free_irq;
2244 
2245         /* PHY control start*/
2246         ret = sh_eth_phy_start(ndev);
2247         if (ret)
2248                 goto out_free_irq;
2249 
2250         netif_start_queue(ndev);
2251 
2252         mdp->is_opened = 1;
2253 
2254         return ret;
2255 
2256 out_free_irq:
2257         free_irq(ndev->irq, ndev);
2258 out_napi_off:
2259         napi_disable(&mdp->napi);
2260         pm_runtime_put_sync(&mdp->pdev->dev);
2261         return ret;
2262 }
2263 
2264 /* Timeout function */
2265 static void sh_eth_tx_timeout(struct net_device *ndev)
2266 {
2267         struct sh_eth_private *mdp = netdev_priv(ndev);
2268         struct sh_eth_rxdesc *rxdesc;
2269         int i;
2270 
2271         netif_stop_queue(ndev);
2272 
2273         netif_err(mdp, timer, ndev,
2274                   "transmit timed out, status %8.8x, resetting...\n",
2275                   sh_eth_read(ndev, EESR));
2276 
2277         /* tx_errors count up */
2278         ndev->stats.tx_errors++;
2279 
2280         /* Free all the skbuffs in the Rx queue. */
2281         for (i = 0; i < mdp->num_rx_ring; i++) {
2282                 rxdesc = &mdp->rx_ring[i];
2283                 rxdesc->status = cpu_to_le32(0);
2284                 rxdesc->addr = cpu_to_le32(0xBADF00D0);
2285                 dev_kfree_skb(mdp->rx_skbuff[i]);
2286                 mdp->rx_skbuff[i] = NULL;
2287         }
2288         for (i = 0; i < mdp->num_tx_ring; i++) {
2289                 dev_kfree_skb(mdp->tx_skbuff[i]);
2290                 mdp->tx_skbuff[i] = NULL;
2291         }
2292 
2293         /* device init */
2294         sh_eth_dev_init(ndev);
2295 
2296         netif_start_queue(ndev);
2297 }
2298 
2299 /* Packet transmit function */
2300 static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev)
2301 {
2302         struct sh_eth_private *mdp = netdev_priv(ndev);
2303         struct sh_eth_txdesc *txdesc;
2304         dma_addr_t dma_addr;
2305         u32 entry;
2306         unsigned long flags;
2307 
2308         spin_lock_irqsave(&mdp->lock, flags);
2309         if ((mdp->cur_tx - mdp->dirty_tx) >= (mdp->num_tx_ring - 4)) {
2310                 if (!sh_eth_txfree(ndev)) {
2311                         netif_warn(mdp, tx_queued, ndev, "TxFD exhausted.\n");
2312                         netif_stop_queue(ndev);
2313                         spin_unlock_irqrestore(&mdp->lock, flags);
2314                         return NETDEV_TX_BUSY;
2315                 }
2316         }
2317         spin_unlock_irqrestore(&mdp->lock, flags);
2318 
2319         if (skb_put_padto(skb, ETH_ZLEN))
2320                 return NETDEV_TX_OK;
2321 
2322         entry = mdp->cur_tx % mdp->num_tx_ring;
2323         mdp->tx_skbuff[entry] = skb;
2324         txdesc = &mdp->tx_ring[entry];
2325         /* soft swap. */
2326         if (!mdp->cd->hw_swap)
2327                 sh_eth_soft_swap(PTR_ALIGN(skb->data, 4), skb->len + 2);
2328         dma_addr = dma_map_single(&ndev->dev, skb->data, skb->len,
2329                                   DMA_TO_DEVICE);
2330         if (dma_mapping_error(&ndev->dev, dma_addr)) {
2331                 kfree_skb(skb);
2332                 return NETDEV_TX_OK;
2333         }
2334         txdesc->addr = cpu_to_le32(dma_addr);
2335         txdesc->len  = cpu_to_le32(skb->len << 16);
2336 
2337         dma_wmb(); /* TACT bit must be set after all the above writes */
2338         if (entry >= mdp->num_tx_ring - 1)
2339                 txdesc->status |= cpu_to_le32(TD_TACT | TD_TDLE);
2340         else
2341                 txdesc->status |= cpu_to_le32(TD_TACT);
2342 
2343         mdp->cur_tx++;
2344 
2345         if (!(sh_eth_read(ndev, EDTRR) & sh_eth_get_edtrr_trns(mdp)))
2346                 sh_eth_write(ndev, sh_eth_get_edtrr_trns(mdp), EDTRR);
2347 
2348         return NETDEV_TX_OK;
2349 }
2350 
2351 /* The statistics registers have write-clear behaviour, which means we
2352  * will lose any increment between the read and write.  We mitigate
2353  * this by only clearing when we read a non-zero value, so we will
2354  * never falsely report a total of zero.
2355  */
2356 static void
2357 sh_eth_update_stat(struct net_device *ndev, unsigned long *stat, int reg)
2358 {
2359         u32 delta = sh_eth_read(ndev, reg);
2360 
2361         if (delta) {
2362                 *stat += delta;
2363                 sh_eth_write(ndev, 0, reg);
2364         }
2365 }
2366 
2367 static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev)
2368 {
2369         struct sh_eth_private *mdp = netdev_priv(ndev);
2370 
2371         if (sh_eth_is_rz_fast_ether(mdp))
2372                 return &ndev->stats;
2373 
2374         if (!mdp->is_opened)
2375                 return &ndev->stats;
2376 
2377         sh_eth_update_stat(ndev, &ndev->stats.tx_dropped, TROCR);
2378         sh_eth_update_stat(ndev, &ndev->stats.collisions, CDCR);
2379         sh_eth_update_stat(ndev, &ndev->stats.tx_carrier_errors, LCCR);
2380 
2381         if (sh_eth_is_gether(mdp)) {
2382                 sh_eth_update_stat(ndev, &ndev->stats.tx_carrier_errors,
2383                                    CERCR);
2384                 sh_eth_update_stat(ndev, &ndev->stats.tx_carrier_errors,
2385                                    CEECR);
2386         } else {
2387                 sh_eth_update_stat(ndev, &ndev->stats.tx_carrier_errors,
2388                                    CNDCR);
2389         }
2390 
2391         return &ndev->stats;
2392 }
2393 
2394 /* device close function */
2395 static int sh_eth_close(struct net_device *ndev)
2396 {
2397         struct sh_eth_private *mdp = netdev_priv(ndev);
2398 
2399         netif_stop_queue(ndev);
2400 
2401         /* Serialise with the interrupt handler and NAPI, then disable
2402          * interrupts.  We have to clear the irq_enabled flag first to
2403          * ensure that interrupts won't be re-enabled.
2404          */
2405         mdp->irq_enabled = false;
2406         synchronize_irq(ndev->irq);
2407         napi_disable(&mdp->napi);
2408         sh_eth_write(ndev, 0x0000, EESIPR);
2409 
2410         sh_eth_dev_exit(ndev);
2411 
2412         /* PHY Disconnect */
2413         if (ndev->phydev) {
2414                 phy_stop(ndev->phydev);
2415                 phy_disconnect(ndev->phydev);
2416         }
2417 
2418         free_irq(ndev->irq, ndev);
2419 
2420         /* Free all the skbuffs in the Rx queue and the DMA buffer. */
2421         sh_eth_ring_free(ndev);
2422 
2423         pm_runtime_put_sync(&mdp->pdev->dev);
2424 
2425         mdp->is_opened = 0;
2426 
2427         return 0;
2428 }
2429 
2430 /* ioctl to device function */
2431 static int sh_eth_do_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
2432 {
2433         struct phy_device *phydev = ndev->phydev;
2434 
2435         if (!netif_running(ndev))
2436                 return -EINVAL;
2437 
2438         if (!phydev)
2439                 return -ENODEV;
2440 
2441         return phy_mii_ioctl(phydev, rq, cmd);
2442 }
2443 
2444 /* For TSU_POSTn. Please refer to the manual about this (strange) bitfields */
2445 static void *sh_eth_tsu_get_post_reg_offset(struct sh_eth_private *mdp,
2446                                             int entry)
2447 {
2448         return sh_eth_tsu_get_offset(mdp, TSU_POST1) + (entry / 8 * 4);
2449 }
2450 
2451 static u32 sh_eth_tsu_get_post_mask(int entry)
2452 {
2453         return 0x0f << (28 - ((entry % 8) * 4));
2454 }
2455 
2456 static u32 sh_eth_tsu_get_post_bit(struct sh_eth_private *mdp, int entry)
2457 {
2458         return (0x08 >> (mdp->port << 1)) << (28 - ((entry % 8) * 4));
2459 }
2460 
2461 static void sh_eth_tsu_enable_cam_entry_post(struct net_device *ndev,
2462                                              int entry)
2463 {
2464         struct sh_eth_private *mdp = netdev_priv(ndev);
2465         u32 tmp;
2466         void *reg_offset;
2467 
2468         reg_offset = sh_eth_tsu_get_post_reg_offset(mdp, entry);
2469         tmp = ioread32(reg_offset);
2470         iowrite32(tmp | sh_eth_tsu_get_post_bit(mdp, entry), reg_offset);
2471 }
2472 
2473 static bool sh_eth_tsu_disable_cam_entry_post(struct net_device *ndev,
2474                                               int entry)
2475 {
2476         struct sh_eth_private *mdp = netdev_priv(ndev);
2477         u32 post_mask, ref_mask, tmp;
2478         void *reg_offset;
2479 
2480         reg_offset = sh_eth_tsu_get_post_reg_offset(mdp, entry);
2481         post_mask = sh_eth_tsu_get_post_mask(entry);
2482         ref_mask = sh_eth_tsu_get_post_bit(mdp, entry) & ~post_mask;
2483 
2484         tmp = ioread32(reg_offset);
2485         iowrite32(tmp & ~post_mask, reg_offset);
2486 
2487         /* If other port enables, the function returns "true" */
2488         return tmp & ref_mask;
2489 }
2490 
2491 static int sh_eth_tsu_busy(struct net_device *ndev)
2492 {
2493         int timeout = SH_ETH_TSU_TIMEOUT_MS * 100;
2494         struct sh_eth_private *mdp = netdev_priv(ndev);
2495 
2496         while ((sh_eth_tsu_read(mdp, TSU_ADSBSY) & TSU_ADSBSY_0)) {
2497                 udelay(10);
2498                 timeout--;
2499                 if (timeout <= 0) {
2500                         netdev_err(ndev, "%s: timeout\n", __func__);
2501                         return -ETIMEDOUT;
2502                 }
2503         }
2504 
2505         return 0;
2506 }
2507 
2508 static int sh_eth_tsu_write_entry(struct net_device *ndev, void *reg,
2509                                   const u8 *addr)
2510 {
2511         u32 val;
2512 
2513         val = addr[0] << 24 | addr[1] << 16 | addr[2] << 8 | addr[3];
2514         iowrite32(val, reg);
2515         if (sh_eth_tsu_busy(ndev) < 0)
2516                 return -EBUSY;
2517 
2518         val = addr[4] << 8 | addr[5];
2519         iowrite32(val, reg + 4);
2520         if (sh_eth_tsu_busy(ndev) < 0)
2521                 return -EBUSY;
2522 
2523         return 0;
2524 }
2525 
2526 static void sh_eth_tsu_read_entry(void *reg, u8 *addr)
2527 {
2528         u32 val;
2529 
2530         val = ioread32(reg);
2531         addr[0] = (val >> 24) & 0xff;
2532         addr[1] = (val >> 16) & 0xff;
2533         addr[2] = (val >> 8) & 0xff;
2534         addr[3] = val & 0xff;
2535         val = ioread32(reg + 4);
2536         addr[4] = (val >> 8) & 0xff;
2537         addr[5] = val & 0xff;
2538 }
2539 
2540 
2541 static int sh_eth_tsu_find_entry(struct net_device *ndev, const u8 *addr)
2542 {
2543         struct sh_eth_private *mdp = netdev_priv(ndev);
2544         void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
2545         int i;
2546         u8 c_addr[ETH_ALEN];
2547 
2548         for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++, reg_offset += 8) {
2549                 sh_eth_tsu_read_entry(reg_offset, c_addr);
2550                 if (ether_addr_equal(addr, c_addr))
2551                         return i;
2552         }
2553 
2554         return -ENOENT;
2555 }
2556 
2557 static int sh_eth_tsu_find_empty(struct net_device *ndev)
2558 {
2559         u8 blank[ETH_ALEN];
2560         int entry;
2561 
2562         memset(blank, 0, sizeof(blank));
2563         entry = sh_eth_tsu_find_entry(ndev, blank);
2564         return (entry < 0) ? -ENOMEM : entry;
2565 }
2566 
2567 static int sh_eth_tsu_disable_cam_entry_table(struct net_device *ndev,
2568                                               int entry)
2569 {
2570         struct sh_eth_private *mdp = netdev_priv(ndev);
2571         void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
2572         int ret;
2573         u8 blank[ETH_ALEN];
2574 
2575         sh_eth_tsu_write(mdp, sh_eth_tsu_read(mdp, TSU_TEN) &
2576                          ~(1 << (31 - entry)), TSU_TEN);
2577 
2578         memset(blank, 0, sizeof(blank));
2579         ret = sh_eth_tsu_write_entry(ndev, reg_offset + entry * 8, blank);
2580         if (ret < 0)
2581                 return ret;
2582         return 0;
2583 }
2584 
2585 static int sh_eth_tsu_add_entry(struct net_device *ndev, const u8 *addr)
2586 {
2587         struct sh_eth_private *mdp = netdev_priv(ndev);
2588         void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
2589         int i, ret;
2590 
2591         if (!mdp->cd->tsu)
2592                 return 0;
2593 
2594         i = sh_eth_tsu_find_entry(ndev, addr);
2595         if (i < 0) {
2596                 /* No entry found, create one */
2597                 i = sh_eth_tsu_find_empty(ndev);
2598                 if (i < 0)
2599                         return -ENOMEM;
2600                 ret = sh_eth_tsu_write_entry(ndev, reg_offset + i * 8, addr);
2601                 if (ret < 0)
2602                         return ret;
2603 
2604                 /* Enable the entry */
2605                 sh_eth_tsu_write(mdp, sh_eth_tsu_read(mdp, TSU_TEN) |
2606                                  (1 << (31 - i)), TSU_TEN);
2607         }
2608 
2609         /* Entry found or created, enable POST */
2610         sh_eth_tsu_enable_cam_entry_post(ndev, i);
2611 
2612         return 0;
2613 }
2614 
2615 static int sh_eth_tsu_del_entry(struct net_device *ndev, const u8 *addr)
2616 {
2617         struct sh_eth_private *mdp = netdev_priv(ndev);
2618         int i, ret;
2619 
2620         if (!mdp->cd->tsu)
2621                 return 0;
2622 
2623         i = sh_eth_tsu_find_entry(ndev, addr);
2624         if (i) {
2625                 /* Entry found */
2626                 if (sh_eth_tsu_disable_cam_entry_post(ndev, i))
2627                         goto done;
2628 
2629                 /* Disable the entry if both ports was disabled */
2630                 ret = sh_eth_tsu_disable_cam_entry_table(ndev, i);
2631                 if (ret < 0)
2632                         return ret;
2633         }
2634 done:
2635         return 0;
2636 }
2637 
2638 static int sh_eth_tsu_purge_all(struct net_device *ndev)
2639 {
2640         struct sh_eth_private *mdp = netdev_priv(ndev);
2641         int i, ret;
2642 
2643         if (!mdp->cd->tsu)
2644                 return 0;
2645 
2646         for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++) {
2647                 if (sh_eth_tsu_disable_cam_entry_post(ndev, i))
2648                         continue;
2649 
2650                 /* Disable the entry if both ports was disabled */
2651                 ret = sh_eth_tsu_disable_cam_entry_table(ndev, i);
2652                 if (ret < 0)
2653                         return ret;
2654         }
2655 
2656         return 0;
2657 }
2658 
2659 static void sh_eth_tsu_purge_mcast(struct net_device *ndev)
2660 {
2661         struct sh_eth_private *mdp = netdev_priv(ndev);
2662         u8 addr[ETH_ALEN];
2663         void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
2664         int i;
2665 
2666         if (!mdp->cd->tsu)
2667                 return;
2668 
2669         for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++, reg_offset += 8) {
2670                 sh_eth_tsu_read_entry(reg_offset, addr);
2671                 if (is_multicast_ether_addr(addr))
2672                         sh_eth_tsu_del_entry(ndev, addr);
2673         }
2674 }
2675 
2676 /* Update promiscuous flag and multicast filter */
2677 static void sh_eth_set_rx_mode(struct net_device *ndev)
2678 {
2679         struct sh_eth_private *mdp = netdev_priv(ndev);
2680         u32 ecmr_bits;
2681         int mcast_all = 0;
2682         unsigned long flags;
2683 
2684         spin_lock_irqsave(&mdp->lock, flags);
2685         /* Initial condition is MCT = 1, PRM = 0.
2686          * Depending on ndev->flags, set PRM or clear MCT
2687          */
2688         ecmr_bits = sh_eth_read(ndev, ECMR) & ~ECMR_PRM;
2689         if (mdp->cd->tsu)
2690                 ecmr_bits |= ECMR_MCT;
2691 
2692         if (!(ndev->flags & IFF_MULTICAST)) {
2693                 sh_eth_tsu_purge_mcast(ndev);
2694                 mcast_all = 1;
2695         }
2696         if (ndev->flags & IFF_ALLMULTI) {
2697                 sh_eth_tsu_purge_mcast(ndev);
2698                 ecmr_bits &= ~ECMR_MCT;
2699                 mcast_all = 1;
2700         }
2701 
2702         if (ndev->flags & IFF_PROMISC) {
2703                 sh_eth_tsu_purge_all(ndev);
2704                 ecmr_bits = (ecmr_bits & ~ECMR_MCT) | ECMR_PRM;
2705         } else if (mdp->cd->tsu) {
2706                 struct netdev_hw_addr *ha;
2707                 netdev_for_each_mc_addr(ha, ndev) {
2708                         if (mcast_all && is_multicast_ether_addr(ha->addr))
2709                                 continue;
2710 
2711                         if (sh_eth_tsu_add_entry(ndev, ha->addr) < 0) {
2712                                 if (!mcast_all) {
2713                                         sh_eth_tsu_purge_mcast(ndev);
2714                                         ecmr_bits &= ~ECMR_MCT;
2715                                         mcast_all = 1;
2716                                 }
2717                         }
2718                 }
2719         }
2720 
2721         /* update the ethernet mode */
2722         sh_eth_write(ndev, ecmr_bits, ECMR);
2723 
2724         spin_unlock_irqrestore(&mdp->lock, flags);
2725 }
2726 
2727 static int sh_eth_get_vtag_index(struct sh_eth_private *mdp)
2728 {
2729         if (!mdp->port)
2730                 return TSU_VTAG0;
2731         else
2732                 return TSU_VTAG1;
2733 }
2734 
2735 static int sh_eth_vlan_rx_add_vid(struct net_device *ndev,
2736                                   __be16 proto, u16 vid)
2737 {
2738         struct sh_eth_private *mdp = netdev_priv(ndev);
2739         int vtag_reg_index = sh_eth_get_vtag_index(mdp);
2740 
2741         if (unlikely(!mdp->cd->tsu))
2742                 return -EPERM;
2743 
2744         /* No filtering if vid = 0 */
2745         if (!vid)
2746                 return 0;
2747 
2748         mdp->vlan_num_ids++;
2749 
2750         /* The controller has one VLAN tag HW filter. So, if the filter is
2751          * already enabled, the driver disables it and the filte
2752          */
2753         if (mdp->vlan_num_ids > 1) {
2754                 /* disable VLAN filter */
2755                 sh_eth_tsu_write(mdp, 0, vtag_reg_index);
2756                 return 0;
2757         }
2758 
2759         sh_eth_tsu_write(mdp, TSU_VTAG_ENABLE | (vid & TSU_VTAG_VID_MASK),
2760                          vtag_reg_index);
2761 
2762         return 0;
2763 }
2764 
2765 static int sh_eth_vlan_rx_kill_vid(struct net_device *ndev,
2766                                    __be16 proto, u16 vid)
2767 {
2768         struct sh_eth_private *mdp = netdev_priv(ndev);
2769         int vtag_reg_index = sh_eth_get_vtag_index(mdp);
2770 
2771         if (unlikely(!mdp->cd->tsu))
2772                 return -EPERM;
2773 
2774         /* No filtering if vid = 0 */
2775         if (!vid)
2776                 return 0;
2777 
2778         mdp->vlan_num_ids--;
2779         sh_eth_tsu_write(mdp, 0, vtag_reg_index);
2780 
2781         return 0;
2782 }
2783 
2784 /* SuperH's TSU register init function */
2785 static void sh_eth_tsu_init(struct sh_eth_private *mdp)
2786 {
2787         if (sh_eth_is_rz_fast_ether(mdp)) {
2788                 sh_eth_tsu_write(mdp, 0, TSU_TEN); /* Disable all CAM entry */
2789                 sh_eth_tsu_write(mdp, TSU_FWSLC_POSTENU | TSU_FWSLC_POSTENL,
2790                                  TSU_FWSLC);    /* Enable POST registers */
2791                 return;
2792         }
2793 
2794         sh_eth_tsu_write(mdp, 0, TSU_FWEN0);    /* Disable forward(0->1) */
2795         sh_eth_tsu_write(mdp, 0, TSU_FWEN1);    /* Disable forward(1->0) */
2796         sh_eth_tsu_write(mdp, 0, TSU_FCM);      /* forward fifo 3k-3k */
2797         sh_eth_tsu_write(mdp, 0xc, TSU_BSYSL0);
2798         sh_eth_tsu_write(mdp, 0xc, TSU_BSYSL1);
2799         sh_eth_tsu_write(mdp, 0, TSU_PRISL0);
2800         sh_eth_tsu_write(mdp, 0, TSU_PRISL1);
2801         sh_eth_tsu_write(mdp, 0, TSU_FWSL0);
2802         sh_eth_tsu_write(mdp, 0, TSU_FWSL1);
2803         sh_eth_tsu_write(mdp, TSU_FWSLC_POSTENU | TSU_FWSLC_POSTENL, TSU_FWSLC);
2804         if (sh_eth_is_gether(mdp)) {
2805                 sh_eth_tsu_write(mdp, 0, TSU_QTAG0);    /* Disable QTAG(0->1) */
2806                 sh_eth_tsu_write(mdp, 0, TSU_QTAG1);    /* Disable QTAG(1->0) */
2807         } else {
2808                 sh_eth_tsu_write(mdp, 0, TSU_QTAGM0);   /* Disable QTAG(0->1) */
2809                 sh_eth_tsu_write(mdp, 0, TSU_QTAGM1);   /* Disable QTAG(1->0) */
2810         }
2811         sh_eth_tsu_write(mdp, 0, TSU_FWSR);     /* all interrupt status clear */
2812         sh_eth_tsu_write(mdp, 0, TSU_FWINMK);   /* Disable all interrupt */
2813         sh_eth_tsu_write(mdp, 0, TSU_TEN);      /* Disable all CAM entry */
2814         sh_eth_tsu_write(mdp, 0, TSU_POST1);    /* Disable CAM entry [ 0- 7] */
2815         sh_eth_tsu_write(mdp, 0, TSU_POST2);    /* Disable CAM entry [ 8-15] */
2816         sh_eth_tsu_write(mdp, 0, TSU_POST3);    /* Disable CAM entry [16-23] */
2817         sh_eth_tsu_write(mdp, 0, TSU_POST4);    /* Disable CAM entry [24-31] */
2818 }
2819 
2820 /* MDIO bus release function */
2821 static int sh_mdio_release(struct sh_eth_private *mdp)
2822 {
2823         /* unregister mdio bus */
2824         mdiobus_unregister(mdp->mii_bus);
2825 
2826         /* free bitbang info */
2827         free_mdio_bitbang(mdp->mii_bus);
2828 
2829         return 0;
2830 }
2831 
2832 /* MDIO bus init function */
2833 static int sh_mdio_init(struct sh_eth_private *mdp,
2834                         struct sh_eth_plat_data *pd)
2835 {
2836         int ret;
2837         struct bb_info *bitbang;
2838         struct platform_device *pdev = mdp->pdev;
2839         struct device *dev = &mdp->pdev->dev;
2840 
2841         /* create bit control struct for PHY */
2842         bitbang = devm_kzalloc(dev, sizeof(struct bb_info), GFP_KERNEL);
2843         if (!bitbang)
2844                 return -ENOMEM;
2845 
2846         /* bitbang init */
2847         bitbang->addr = mdp->addr + mdp->reg_offset[PIR];
2848         bitbang->set_gate = pd->set_mdio_gate;
2849         bitbang->ctrl.ops = &bb_ops;
2850 
2851         /* MII controller setting */
2852         mdp->mii_bus = alloc_mdio_bitbang(&bitbang->ctrl);
2853         if (!mdp->mii_bus)
2854                 return -ENOMEM;
2855 
2856         /* Hook up MII support for ethtool */
2857         mdp->mii_bus->name = "sh_mii";
2858         mdp->mii_bus->parent = dev;
2859         snprintf(mdp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
2860                  pdev->name, pdev->id);
2861 
2862         /* register MDIO bus */
2863         if (dev->of_node) {
2864                 ret = of_mdiobus_register(mdp->mii_bus, dev->of_node);
2865         } else {
2866                 if (pd->phy_irq > 0)
2867                         mdp->mii_bus->irq[pd->phy] = pd->phy_irq;
2868 
2869                 ret = mdiobus_register(mdp->mii_bus);
2870         }
2871 
2872         if (ret)
2873                 goto out_free_bus;
2874 
2875         return 0;
2876 
2877 out_free_bus:
2878         free_mdio_bitbang(mdp->mii_bus);
2879         return ret;
2880 }
2881 
2882 static const u16 *sh_eth_get_register_offset(int register_type)
2883 {
2884         const u16 *reg_offset = NULL;
2885 
2886         switch (register_type) {
2887         case SH_ETH_REG_GIGABIT:
2888                 reg_offset = sh_eth_offset_gigabit;
2889                 break;
2890         case SH_ETH_REG_FAST_RZ:
2891                 reg_offset = sh_eth_offset_fast_rz;
2892                 break;
2893         case SH_ETH_REG_FAST_RCAR:
2894                 reg_offset = sh_eth_offset_fast_rcar;
2895                 break;
2896         case SH_ETH_REG_FAST_SH4:
2897                 reg_offset = sh_eth_offset_fast_sh4;
2898                 break;
2899         case SH_ETH_REG_FAST_SH3_SH2:
2900                 reg_offset = sh_eth_offset_fast_sh3_sh2;
2901                 break;
2902         }
2903 
2904         return reg_offset;
2905 }
2906 
2907 static const struct net_device_ops sh_eth_netdev_ops = {
2908         .ndo_open               = sh_eth_open,
2909         .ndo_stop               = sh_eth_close,
2910         .ndo_start_xmit         = sh_eth_start_xmit,
2911         .ndo_get_stats          = sh_eth_get_stats,
2912         .ndo_set_rx_mode        = sh_eth_set_rx_mode,
2913         .ndo_tx_timeout         = sh_eth_tx_timeout,
2914         .ndo_do_ioctl           = sh_eth_do_ioctl,
2915         .ndo_validate_addr      = eth_validate_addr,
2916         .ndo_set_mac_address    = eth_mac_addr,
2917         .ndo_change_mtu         = eth_change_mtu,
2918 };
2919 
2920 static const struct net_device_ops sh_eth_netdev_ops_tsu = {
2921         .ndo_open               = sh_eth_open,
2922         .ndo_stop               = sh_eth_close,
2923         .ndo_start_xmit         = sh_eth_start_xmit,
2924         .ndo_get_stats          = sh_eth_get_stats,
2925         .ndo_set_rx_mode        = sh_eth_set_rx_mode,
2926         .ndo_vlan_rx_add_vid    = sh_eth_vlan_rx_add_vid,
2927         .ndo_vlan_rx_kill_vid   = sh_eth_vlan_rx_kill_vid,
2928         .ndo_tx_timeout         = sh_eth_tx_timeout,
2929         .ndo_do_ioctl           = sh_eth_do_ioctl,
2930         .ndo_validate_addr      = eth_validate_addr,
2931         .ndo_set_mac_address    = eth_mac_addr,
2932         .ndo_change_mtu         = eth_change_mtu,
2933 };
2934 
2935 #ifdef CONFIG_OF
2936 static struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev)
2937 {
2938         struct device_node *np = dev->of_node;
2939         struct sh_eth_plat_data *pdata;
2940         const char *mac_addr;
2941 
2942         pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
2943         if (!pdata)
2944                 return NULL;
2945 
2946         pdata->phy_interface = of_get_phy_mode(np);
2947 
2948         mac_addr = of_get_mac_address(np);
2949         if (mac_addr)
2950                 memcpy(pdata->mac_addr, mac_addr, ETH_ALEN);
2951 
2952         pdata->no_ether_link =
2953                 of_property_read_bool(np, "renesas,no-ether-link");
2954         pdata->ether_link_active_low =
2955                 of_property_read_bool(np, "renesas,ether-link-active-low");
2956 
2957         return pdata;
2958 }
2959 
2960 static const struct of_device_id sh_eth_match_table[] = {
2961         { .compatible = "renesas,gether-r8a7740", .data = &r8a7740_data },
2962         { .compatible = "renesas,ether-r8a7743", .data = &r8a779x_data },
2963         { .compatible = "renesas,ether-r8a7745", .data = &r8a779x_data },
2964         { .compatible = "renesas,ether-r8a7778", .data = &r8a777x_data },
2965         { .compatible = "renesas,ether-r8a7779", .data = &r8a777x_data },
2966         { .compatible = "renesas,ether-r8a7790", .data = &r8a779x_data },
2967         { .compatible = "renesas,ether-r8a7791", .data = &r8a779x_data },
2968         { .compatible = "renesas,ether-r8a7793", .data = &r8a779x_data },
2969         { .compatible = "renesas,ether-r8a7794", .data = &r8a779x_data },
2970         { .compatible = "renesas,ether-r7s72100", .data = &r7s72100_data },
2971         { }
2972 };
2973 MODULE_DEVICE_TABLE(of, sh_eth_match_table);
2974 #else
2975 static inline struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev)
2976 {
2977         return NULL;
2978 }
2979 #endif
2980 
2981 static int sh_eth_drv_probe(struct platform_device *pdev)
2982 {
2983         struct resource *res;
2984         struct sh_eth_plat_data *pd = dev_get_platdata(&pdev->dev);
2985         const struct platform_device_id *id = platform_get_device_id(pdev);
2986         struct sh_eth_private *mdp;
2987         struct net_device *ndev;
2988         int ret, devno;
2989 
2990         /* get base addr */
2991         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2992 
2993         ndev = alloc_etherdev(sizeof(struct sh_eth_private));
2994         if (!ndev)
2995                 return -ENOMEM;
2996 
2997         pm_runtime_enable(&pdev->dev);
2998         pm_runtime_get_sync(&pdev->dev);
2999 
3000         devno = pdev->id;
3001         if (devno < 0)
3002                 devno = 0;
3003 
3004         ret = platform_get_irq(pdev, 0);
3005         if (ret < 0)
3006                 goto out_release;
3007         ndev->irq = ret;
3008 
3009         SET_NETDEV_DEV(ndev, &pdev->dev);
3010 
3011         mdp = netdev_priv(ndev);
3012         mdp->num_tx_ring = TX_RING_SIZE;
3013         mdp->num_rx_ring = RX_RING_SIZE;
3014         mdp->addr = devm_ioremap_resource(&pdev->dev, res);
3015         if (IS_ERR(mdp->addr)) {
3016                 ret = PTR_ERR(mdp->addr);
3017                 goto out_release;
3018         }
3019 
3020         ndev->base_addr = res->start;
3021 
3022         spin_lock_init(&mdp->lock);
3023         mdp->pdev = pdev;
3024 
3025         if (pdev->dev.of_node)
3026                 pd = sh_eth_parse_dt(&pdev->dev);
3027         if (!pd) {
3028                 dev_err(&pdev->dev, "no platform data\n");
3029                 ret = -EINVAL;
3030                 goto out_release;
3031         }
3032 
3033         /* get PHY ID */
3034         mdp->phy_id = pd->phy;
3035         mdp->phy_interface = pd->phy_interface;
3036         mdp->no_ether_link = pd->no_ether_link;
3037         mdp->ether_link_active_low = pd->ether_link_active_low;
3038 
3039         /* set cpu data */
3040         if (id)
3041                 mdp->cd = (struct sh_eth_cpu_data *)id->driver_data;
3042         else
3043                 mdp->cd = (struct sh_eth_cpu_data *)of_device_get_match_data(&pdev->dev);
3044 
3045         mdp->reg_offset = sh_eth_get_register_offset(mdp->cd->register_type);
3046         if (!mdp->reg_offset) {
3047                 dev_err(&pdev->dev, "Unknown register type (%d)\n",
3048                         mdp->cd->register_type);
3049                 ret = -EINVAL;
3050                 goto out_release;
3051         }
3052         sh_eth_set_default_cpu_data(mdp->cd);
3053 
3054         /* set function */
3055         if (mdp->cd->tsu)
3056                 ndev->netdev_ops = &sh_eth_netdev_ops_tsu;
3057         else
3058                 ndev->netdev_ops = &sh_eth_netdev_ops;
3059         ndev->ethtool_ops = &sh_eth_ethtool_ops;
3060         ndev->watchdog_timeo = TX_TIMEOUT;
3061 
3062         /* debug message level */
3063         mdp->msg_enable = SH_ETH_DEF_MSG_ENABLE;
3064 
3065         /* read and set MAC address */
3066         read_mac_address(ndev, pd->mac_addr);
3067         if (!is_valid_ether_addr(ndev->dev_addr)) {
3068                 dev_warn(&pdev->dev,
3069                          "no valid MAC address supplied, using a random one.\n");
3070                 eth_hw_addr_random(ndev);
3071         }
3072 
3073         /* ioremap the TSU registers */
3074         if (mdp->cd->tsu) {
3075                 struct resource *rtsu;
3076                 rtsu = platform_get_resource(pdev, IORESOURCE_MEM, 1);
3077                 mdp->tsu_addr = devm_ioremap_resource(&pdev->dev, rtsu);
3078                 if (IS_ERR(mdp->tsu_addr)) {
3079                         ret = PTR_ERR(mdp->tsu_addr);
3080                         goto out_release;
3081                 }
3082                 mdp->port = devno % 2;
3083                 ndev->features = NETIF_F_HW_VLAN_CTAG_FILTER;
3084         }
3085 
3086         /* initialize first or needed device */
3087         if (!devno || pd->needs_init) {
3088                 if (mdp->cd->chip_reset)
3089                         mdp->cd->chip_reset(ndev);
3090 
3091                 if (mdp->cd->tsu) {
3092                         /* TSU init (Init only)*/
3093                         sh_eth_tsu_init(mdp);
3094                 }
3095         }
3096 
3097         if (mdp->cd->rmiimode)
3098                 sh_eth_write(ndev, 0x1, RMIIMODE);
3099 
3100         /* MDIO bus init */
3101         ret = sh_mdio_init(mdp, pd);
3102         if (ret) {
3103                 dev_err(&ndev->dev, "failed to initialise MDIO\n");
3104                 goto out_release;
3105         }
3106 
3107         netif_napi_add(ndev, &mdp->napi, sh_eth_poll, 64);
3108 
3109         /* network device register */
3110         ret = register_netdev(ndev);
3111         if (ret)
3112                 goto out_napi_del;
3113 
3114         /* print device information */
3115         netdev_info(ndev, "Base address at 0x%x, %pM, IRQ %d.\n",
3116                     (u32)ndev->base_addr, ndev->dev_addr, ndev->irq);
3117 
3118         pm_runtime_put(&pdev->dev);
3119         platform_set_drvdata(pdev, ndev);
3120 
3121         return ret;
3122 
3123 out_napi_del:
3124         netif_napi_del(&mdp->napi);
3125         sh_mdio_release(mdp);
3126 
3127 out_release:
3128         /* net_dev free */
3129         if (ndev)
3130                 free_netdev(ndev);
3131 
3132         pm_runtime_put(&pdev->dev);
3133         pm_runtime_disable(&pdev->dev);
3134         return ret;
3135 }
3136 
3137 static int sh_eth_drv_remove(struct platform_device *pdev)
3138 {
3139         struct net_device *ndev = platform_get_drvdata(pdev);
3140         struct sh_eth_private *mdp = netdev_priv(ndev);
3141 
3142         unregister_netdev(ndev);
3143         netif_napi_del(&mdp->napi);
3144         sh_mdio_release(mdp);
3145         pm_runtime_disable(&pdev->dev);
3146         free_netdev(ndev);
3147 
3148         return 0;
3149 }
3150 
3151 #ifdef CONFIG_PM
3152 #ifdef CONFIG_PM_SLEEP
3153 static int sh_eth_suspend(struct device *dev)
3154 {
3155         struct net_device *ndev = dev_get_drvdata(dev);
3156         int ret = 0;
3157 
3158         if (netif_running(ndev)) {
3159                 netif_device_detach(ndev);
3160                 ret = sh_eth_close(ndev);
3161         }
3162 
3163         return ret;
3164 }
3165 
3166 static int sh_eth_resume(struct device *dev)
3167 {
3168         struct net_device *ndev = dev_get_drvdata(dev);
3169         int ret = 0;
3170 
3171         if (netif_running(ndev)) {
3172                 ret = sh_eth_open(ndev);
3173                 if (ret < 0)
3174                         return ret;
3175                 netif_device_attach(ndev);
3176         }
3177 
3178         return ret;
3179 }
3180 #endif
3181 
3182 static int sh_eth_runtime_nop(struct device *dev)
3183 {
3184         /* Runtime PM callback shared between ->runtime_suspend()
3185          * and ->runtime_resume(). Simply returns success.
3186          *
3187          * This driver re-initializes all registers after
3188          * pm_runtime_get_sync() anyway so there is no need
3189          * to save and restore registers here.
3190          */
3191         return 0;
3192 }
3193 
3194 static const struct dev_pm_ops sh_eth_dev_pm_ops = {
3195         SET_SYSTEM_SLEEP_PM_OPS(sh_eth_suspend, sh_eth_resume)
3196         SET_RUNTIME_PM_OPS(sh_eth_runtime_nop, sh_eth_runtime_nop, NULL)
3197 };
3198 #define SH_ETH_PM_OPS (&sh_eth_dev_pm_ops)
3199 #else
3200 #define SH_ETH_PM_OPS NULL
3201 #endif
3202 
3203 static struct platform_device_id sh_eth_id_table[] = {
3204         { "sh7619-ether", (kernel_ulong_t)&sh7619_data },
3205         { "sh771x-ether", (kernel_ulong_t)&sh771x_data },
3206         { "sh7724-ether", (kernel_ulong_t)&sh7724_data },
3207         { "sh7734-gether", (kernel_ulong_t)&sh7734_data },
3208         { "sh7757-ether", (kernel_ulong_t)&sh7757_data },
3209         { "sh7757-gether", (kernel_ulong_t)&sh7757_data_giga },
3210         { "sh7763-gether", (kernel_ulong_t)&sh7763_data },
3211         { }
3212 };
3213 MODULE_DEVICE_TABLE(platform, sh_eth_id_table);
3214 
3215 static struct platform_driver sh_eth_driver = {
3216         .probe = sh_eth_drv_probe,
3217         .remove = sh_eth_drv_remove,
3218         .id_table = sh_eth_id_table,
3219         .driver = {
3220                    .name = CARDNAME,
3221                    .pm = SH_ETH_PM_OPS,
3222                    .of_match_table = of_match_ptr(sh_eth_match_table),
3223         },
3224 };
3225 
3226 module_platform_driver(sh_eth_driver);
3227 
3228 MODULE_AUTHOR("Nobuhiro Iwamatsu, Yoshihiro Shimoda");
3229 MODULE_DESCRIPTION("Renesas SuperH Ethernet driver");
3230 MODULE_LICENSE("GPL v2");
3231 

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