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proc: use seq_puts()/seq_putc() where possible
[linux-2.6/next.git] / drivers / net / sh_eth.c
blob819c1750e2abf750cbb73ad779dd695a1464326d
1 /*
2 * SuperH Ethernet device driver
3 *
4 * Copyright (C) 2006-2008 Nobuhiro Iwamatsu
5 * Copyright (C) 2008-2009 Renesas Solutions Corp.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2, as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * The full GNU General Public License is included in this distribution in
20 * the file called "COPYING".
21 */
22
23 #include <linux/init.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/etherdevice.h>
26 #include <linux/delay.h>
27 #include <linux/platform_device.h>
28 #include <linux/mdio-bitbang.h>
29 #include <linux/netdevice.h>
30 #include <linux/phy.h>
31 #include <linux/cache.h>
32 #include <linux/io.h>
33 #include <linux/pm_runtime.h>
34 #include <linux/slab.h>
35 #include <asm/cacheflush.h>
36
37 #include "sh_eth.h"
38
39 /* There is CPU dependent code */
40 #if defined(CONFIG_CPU_SUBTYPE_SH7724)
41 #define SH_ETH_RESET_DEFAULT 1
42 static void sh_eth_set_duplex(struct net_device *ndev)
43 {
44 struct sh_eth_private *mdp = netdev_priv(ndev);
45 u32 ioaddr = ndev->base_addr;
46
47 if (mdp->duplex) /* Full */
48 writel(readl(ioaddr + ECMR) | ECMR_DM, ioaddr + ECMR);
49 else /* Half */
50 writel(readl(ioaddr + ECMR) & ~ECMR_DM, ioaddr + ECMR);
51 }
52
53 static void sh_eth_set_rate(struct net_device *ndev)
54 {
55 struct sh_eth_private *mdp = netdev_priv(ndev);
56 u32 ioaddr = ndev->base_addr;
57
58 switch (mdp->speed) {
59 case 10: /* 10BASE */
60 writel(readl(ioaddr + ECMR) & ~ECMR_RTM, ioaddr + ECMR);
61 break;
62 case 100:/* 100BASE */
63 writel(readl(ioaddr + ECMR) | ECMR_RTM, ioaddr + ECMR);
64 break;
65 default:
66 break;
67 }
68 }
69
70 /* SH7724 */
71 static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
72 .set_duplex = sh_eth_set_duplex,
73 .set_rate = sh_eth_set_rate,
74
75 .ecsr_value = ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
76 .ecsipr_value = ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
77 .eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x01ff009f,
78
79 .tx_check = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
80 .eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RDE |
81 EESR_RFRMER | EESR_TFE | EESR_TDE | EESR_ECI,
82 .tx_error_check = EESR_TWB | EESR_TABT | EESR_TDE | EESR_TFE,
83
84 .apr = 1,
85 .mpr = 1,
86 .tpauser = 1,
87 .hw_swap = 1,
88 .rpadir = 1,
89 .rpadir_value = 0x00020000, /* NET_IP_ALIGN assumed to be 2 */
90 };
91 #elif defined(CONFIG_CPU_SUBTYPE_SH7757)
92 #define SH_ETH_RESET_DEFAULT 1
93 static void sh_eth_set_duplex(struct net_device *ndev)
94 {
95 struct sh_eth_private *mdp = netdev_priv(ndev);
96 u32 ioaddr = ndev->base_addr;
97
98 if (mdp->duplex) /* Full */
99 writel(readl(ioaddr + ECMR) | ECMR_DM, ioaddr + ECMR);
100 else /* Half */
101 writel(readl(ioaddr + ECMR) & ~ECMR_DM, ioaddr + ECMR);
102 }
103
104 static void sh_eth_set_rate(struct net_device *ndev)
105 {
106 struct sh_eth_private *mdp = netdev_priv(ndev);
107 u32 ioaddr = ndev->base_addr;
108
109 switch (mdp->speed) {
110 case 10: /* 10BASE */
111 writel(0, ioaddr + RTRATE);
112 break;
113 case 100:/* 100BASE */
114 writel(1, ioaddr + RTRATE);
115 break;
116 default:
117 break;
118 }
119 }
120
121 /* SH7757 */
122 static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
123 .set_duplex = sh_eth_set_duplex,
124 .set_rate = sh_eth_set_rate,
125
126 .eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
127 .rmcr_value = 0x00000001,
128
129 .tx_check = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
130 .eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RDE |
131 EESR_RFRMER | EESR_TFE | EESR_TDE | EESR_ECI,
132 .tx_error_check = EESR_TWB | EESR_TABT | EESR_TDE | EESR_TFE,
133
134 .apr = 1,
135 .mpr = 1,
136 .tpauser = 1,
137 .hw_swap = 1,
138 .no_ade = 1,
139 };
140
141 #elif defined(CONFIG_CPU_SUBTYPE_SH7763)
142 #define SH_ETH_HAS_TSU 1
143 static void sh_eth_chip_reset(struct net_device *ndev)
144 {
145 /* reset device */
146 writel(ARSTR_ARSTR, ARSTR);
147 mdelay(1);
148 }
149
150 static void sh_eth_reset(struct net_device *ndev)
151 {
152 u32 ioaddr = ndev->base_addr;
153 int cnt = 100;
154
155 writel(EDSR_ENALL, ioaddr + EDSR);
156 writel(readl(ioaddr + EDMR) | EDMR_SRST, ioaddr + EDMR);
157 while (cnt > 0) {
158 if (!(readl(ioaddr + EDMR) & 0x3))
159 break;
160 mdelay(1);
161 cnt--;
162 }
163 if (cnt == 0)
164 printk(KERN_ERR "Device reset fail\n");
165
166 /* Table Init */
167 writel(0x0, ioaddr + TDLAR);
168 writel(0x0, ioaddr + TDFAR);
169 writel(0x0, ioaddr + TDFXR);
170 writel(0x0, ioaddr + TDFFR);
171 writel(0x0, ioaddr + RDLAR);
172 writel(0x0, ioaddr + RDFAR);
173 writel(0x0, ioaddr + RDFXR);
174 writel(0x0, ioaddr + RDFFR);
175 }
176
177 static void sh_eth_set_duplex(struct net_device *ndev)
178 {
179 struct sh_eth_private *mdp = netdev_priv(ndev);
180 u32 ioaddr = ndev->base_addr;
181
182 if (mdp->duplex) /* Full */
183 writel(readl(ioaddr + ECMR) | ECMR_DM, ioaddr + ECMR);
184 else /* Half */
185 writel(readl(ioaddr + ECMR) & ~ECMR_DM, ioaddr + ECMR);
186 }
187
188 static void sh_eth_set_rate(struct net_device *ndev)
189 {
190 struct sh_eth_private *mdp = netdev_priv(ndev);
191 u32 ioaddr = ndev->base_addr;
192
193 switch (mdp->speed) {
194 case 10: /* 10BASE */
195 writel(GECMR_10, ioaddr + GECMR);
196 break;
197 case 100:/* 100BASE */
198 writel(GECMR_100, ioaddr + GECMR);
199 break;
200 case 1000: /* 1000BASE */
201 writel(GECMR_1000, ioaddr + GECMR);
202 break;
203 default:
204 break;
205 }
206 }
207
208 /* sh7763 */
209 static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
210 .chip_reset = sh_eth_chip_reset,
211 .set_duplex = sh_eth_set_duplex,
212 .set_rate = sh_eth_set_rate,
213
214 .ecsr_value = ECSR_ICD | ECSR_MPD,
215 .ecsipr_value = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
216 .eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
217
218 .tx_check = EESR_TC1 | EESR_FTC,
219 .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT | \
220 EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE | \
221 EESR_ECI,
222 .tx_error_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_TDE | \
223 EESR_TFE,
224
225 .apr = 1,
226 .mpr = 1,
227 .tpauser = 1,
228 .bculr = 1,
229 .hw_swap = 1,
230 .no_trimd = 1,
231 .no_ade = 1,
232 };
233
234 #elif defined(CONFIG_CPU_SUBTYPE_SH7619)
235 #define SH_ETH_RESET_DEFAULT 1
236 static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
237 .eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
238
239 .apr = 1,
240 .mpr = 1,
241 .tpauser = 1,
242 .hw_swap = 1,
243 };
244 #elif defined(CONFIG_CPU_SUBTYPE_SH7710) || defined(CONFIG_CPU_SUBTYPE_SH7712)
245 #define SH_ETH_RESET_DEFAULT 1
246 #define SH_ETH_HAS_TSU 1
247 static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
248 .eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
249 };
250 #endif
251
252 static void sh_eth_set_default_cpu_data(struct sh_eth_cpu_data *cd)
253 {
254 if (!cd->ecsr_value)
255 cd->ecsr_value = DEFAULT_ECSR_INIT;
256
257 if (!cd->ecsipr_value)
258 cd->ecsipr_value = DEFAULT_ECSIPR_INIT;
259
260 if (!cd->fcftr_value)
261 cd->fcftr_value = DEFAULT_FIFO_F_D_RFF | \
262 DEFAULT_FIFO_F_D_RFD;
263
264 if (!cd->fdr_value)
265 cd->fdr_value = DEFAULT_FDR_INIT;
266
267 if (!cd->rmcr_value)
268 cd->rmcr_value = DEFAULT_RMCR_VALUE;
269
270 if (!cd->tx_check)
271 cd->tx_check = DEFAULT_TX_CHECK;
272
273 if (!cd->eesr_err_check)
274 cd->eesr_err_check = DEFAULT_EESR_ERR_CHECK;
275
276 if (!cd->tx_error_check)
277 cd->tx_error_check = DEFAULT_TX_ERROR_CHECK;
278 }
279
280 #if defined(SH_ETH_RESET_DEFAULT)
281 /* Chip Reset */
282 static void sh_eth_reset(struct net_device *ndev)
283 {
284 u32 ioaddr = ndev->base_addr;
285
286 writel(readl(ioaddr + EDMR) | EDMR_SRST, ioaddr + EDMR);
287 mdelay(3);
288 writel(readl(ioaddr + EDMR) & ~EDMR_SRST, ioaddr + EDMR);
289 }
290 #endif
291
292 #if defined(CONFIG_CPU_SH4)
293 static void sh_eth_set_receive_align(struct sk_buff *skb)
294 {
295 int reserve;
296
297 reserve = SH4_SKB_RX_ALIGN - ((u32)skb->data & (SH4_SKB_RX_ALIGN - 1));
298 if (reserve)
299 skb_reserve(skb, reserve);
300 }
301 #else
302 static void sh_eth_set_receive_align(struct sk_buff *skb)
303 {
304 skb_reserve(skb, SH2_SH3_SKB_RX_ALIGN);
305 }
306 #endif
307
308
309 /* CPU <-> EDMAC endian convert */
310 static inline __u32 cpu_to_edmac(struct sh_eth_private *mdp, u32 x)
311 {
312 switch (mdp->edmac_endian) {
313 case EDMAC_LITTLE_ENDIAN:
314 return cpu_to_le32(x);
315 case EDMAC_BIG_ENDIAN:
316 return cpu_to_be32(x);
317 }
318 return x;
319 }
320
321 static inline __u32 edmac_to_cpu(struct sh_eth_private *mdp, u32 x)
322 {
323 switch (mdp->edmac_endian) {
324 case EDMAC_LITTLE_ENDIAN:
325 return le32_to_cpu(x);
326 case EDMAC_BIG_ENDIAN:
327 return be32_to_cpu(x);
328 }
329 return x;
330 }
331
332 /*
333 * Program the hardware MAC address from dev->dev_addr.
334 */
335 static void update_mac_address(struct net_device *ndev)
336 {
337 u32 ioaddr = ndev->base_addr;
338
339 writel((ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) |
340 (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]),
341 ioaddr + MAHR);
342 writel((ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]),
343 ioaddr + MALR);
344 }
345
346 /*
347 * Get MAC address from SuperH MAC address register
348 *
349 * SuperH's Ethernet device doesn't have 'ROM' to MAC address.
350 * This driver get MAC address that use by bootloader(U-boot or sh-ipl+g).
351 * When you want use this device, you must set MAC address in bootloader.
352 *
353 */
354 static void read_mac_address(struct net_device *ndev, unsigned char *mac)
355 {
356 u32 ioaddr = ndev->base_addr;
357
358 if (mac[0] || mac[1] || mac[2] || mac[3] || mac[4] || mac[5]) {
359 memcpy(ndev->dev_addr, mac, 6);
360 } else {
361 ndev->dev_addr[0] = (readl(ioaddr + MAHR) >> 24);
362 ndev->dev_addr[1] = (readl(ioaddr + MAHR) >> 16) & 0xFF;
363 ndev->dev_addr[2] = (readl(ioaddr + MAHR) >> 8) & 0xFF;
364 ndev->dev_addr[3] = (readl(ioaddr + MAHR) & 0xFF);
365 ndev->dev_addr[4] = (readl(ioaddr + MALR) >> 8) & 0xFF;
366 ndev->dev_addr[5] = (readl(ioaddr + MALR) & 0xFF);
367 }
368 }
369
370 struct bb_info {
371 struct mdiobb_ctrl ctrl;
372 u32 addr;
373 u32 mmd_msk;/* MMD */
374 u32 mdo_msk;
375 u32 mdi_msk;
376 u32 mdc_msk;
377 };
378
379 /* PHY bit set */
380 static void bb_set(u32 addr, u32 msk)
381 {
382 writel(readl(addr) | msk, addr);
383 }
384
385 /* PHY bit clear */
386 static void bb_clr(u32 addr, u32 msk)
387 {
388 writel((readl(addr) & ~msk), addr);
389 }
390
391 /* PHY bit read */
392 static int bb_read(u32 addr, u32 msk)
393 {
394 return (readl(addr) & msk) != 0;
395 }
396
397 /* Data I/O pin control */
398 static void sh_mmd_ctrl(struct mdiobb_ctrl *ctrl, int bit)
399 {
400 struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
401 if (bit)
402 bb_set(bitbang->addr, bitbang->mmd_msk);
403 else
404 bb_clr(bitbang->addr, bitbang->mmd_msk);
405 }
406
407 /* Set bit data*/
408 static void sh_set_mdio(struct mdiobb_ctrl *ctrl, int bit)
409 {
410 struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
411
412 if (bit)
413 bb_set(bitbang->addr, bitbang->mdo_msk);
414 else
415 bb_clr(bitbang->addr, bitbang->mdo_msk);
416 }
417
418 /* Get bit data*/
419 static int sh_get_mdio(struct mdiobb_ctrl *ctrl)
420 {
421 struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
422 return bb_read(bitbang->addr, bitbang->mdi_msk);
423 }
424
425 /* MDC pin control */
426 static void sh_mdc_ctrl(struct mdiobb_ctrl *ctrl, int bit)
427 {
428 struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
429
430 if (bit)
431 bb_set(bitbang->addr, bitbang->mdc_msk);
432 else
433 bb_clr(bitbang->addr, bitbang->mdc_msk);
434 }
435
436 /* mdio bus control struct */
437 static struct mdiobb_ops bb_ops = {
438 .owner = THIS_MODULE,
439 .set_mdc = sh_mdc_ctrl,
440 .set_mdio_dir = sh_mmd_ctrl,
441 .set_mdio_data = sh_set_mdio,
442 .get_mdio_data = sh_get_mdio,
443 };
444
445 /* free skb and descriptor buffer */
446 static void sh_eth_ring_free(struct net_device *ndev)
447 {
448 struct sh_eth_private *mdp = netdev_priv(ndev);
449 int i;
450
451 /* Free Rx skb ringbuffer */
452 if (mdp->rx_skbuff) {
453 for (i = 0; i < RX_RING_SIZE; i++) {
454 if (mdp->rx_skbuff[i])
455 dev_kfree_skb(mdp->rx_skbuff[i]);
456 }
457 }
458 kfree(mdp->rx_skbuff);
459
460 /* Free Tx skb ringbuffer */
461 if (mdp->tx_skbuff) {
462 for (i = 0; i < TX_RING_SIZE; i++) {
463 if (mdp->tx_skbuff[i])
464 dev_kfree_skb(mdp->tx_skbuff[i]);
465 }
466 }
467 kfree(mdp->tx_skbuff);
468 }
469
470 /* format skb and descriptor buffer */
471 static void sh_eth_ring_format(struct net_device *ndev)
472 {
473 u32 ioaddr = ndev->base_addr;
474 struct sh_eth_private *mdp = netdev_priv(ndev);
475 int i;
476 struct sk_buff *skb;
477 struct sh_eth_rxdesc *rxdesc = NULL;
478 struct sh_eth_txdesc *txdesc = NULL;
479 int rx_ringsize = sizeof(*rxdesc) * RX_RING_SIZE;
480 int tx_ringsize = sizeof(*txdesc) * TX_RING_SIZE;
481
482 mdp->cur_rx = mdp->cur_tx = 0;
483 mdp->dirty_rx = mdp->dirty_tx = 0;
484
485 memset(mdp->rx_ring, 0, rx_ringsize);
486
487 /* build Rx ring buffer */
488 for (i = 0; i < RX_RING_SIZE; i++) {
489 /* skb */
490 mdp->rx_skbuff[i] = NULL;
491 skb = dev_alloc_skb(mdp->rx_buf_sz);
492 mdp->rx_skbuff[i] = skb;
493 if (skb == NULL)
494 break;
495 dma_map_single(&ndev->dev, skb->tail, mdp->rx_buf_sz,
496 DMA_FROM_DEVICE);
497 skb->dev = ndev; /* Mark as being used by this device. */
498 sh_eth_set_receive_align(skb);
499
500 /* RX descriptor */
501 rxdesc = &mdp->rx_ring[i];
502 rxdesc->addr = virt_to_phys(PTR_ALIGN(skb->data, 4));
503 rxdesc->status = cpu_to_edmac(mdp, RD_RACT | RD_RFP);
504
505 /* The size of the buffer is 16 byte boundary. */
506 rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16);
507 /* Rx descriptor address set */
508 if (i == 0) {
509 writel(mdp->rx_desc_dma, ioaddr + RDLAR);
510 #if defined(CONFIG_CPU_SUBTYPE_SH7763)
511 writel(mdp->rx_desc_dma, ioaddr + RDFAR);
512 #endif
513 }
514 }
515
516 mdp->dirty_rx = (u32) (i - RX_RING_SIZE);
517
518 /* Mark the last entry as wrapping the ring. */
519 rxdesc->status |= cpu_to_edmac(mdp, RD_RDEL);
520
521 memset(mdp->tx_ring, 0, tx_ringsize);
522
523 /* build Tx ring buffer */
524 for (i = 0; i < TX_RING_SIZE; i++) {
525 mdp->tx_skbuff[i] = NULL;
526 txdesc = &mdp->tx_ring[i];
527 txdesc->status = cpu_to_edmac(mdp, TD_TFP);
528 txdesc->buffer_length = 0;
529 if (i == 0) {
530 /* Tx descriptor address set */
531 writel(mdp->tx_desc_dma, ioaddr + TDLAR);
532 #if defined(CONFIG_CPU_SUBTYPE_SH7763)
533 writel(mdp->tx_desc_dma, ioaddr + TDFAR);
534 #endif
535 }
536 }
537
538 txdesc->status |= cpu_to_edmac(mdp, TD_TDLE);
539 }
540
541 /* Get skb and descriptor buffer */
542 static int sh_eth_ring_init(struct net_device *ndev)
543 {
544 struct sh_eth_private *mdp = netdev_priv(ndev);
545 int rx_ringsize, tx_ringsize, ret = 0;
546
547 /*
548 * +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
549 * card needs room to do 8 byte alignment, +2 so we can reserve
550 * the first 2 bytes, and +16 gets room for the status word from the
551 * card.
552 */
553 mdp->rx_buf_sz = (ndev->mtu <= 1492 ? PKT_BUF_SZ :
554 (((ndev->mtu + 26 + 7) & ~7) + 2 + 16));
555 if (mdp->cd->rpadir)
556 mdp->rx_buf_sz += NET_IP_ALIGN;
557
558 /* Allocate RX and TX skb rings */
559 mdp->rx_skbuff = kmalloc(sizeof(*mdp->rx_skbuff) * RX_RING_SIZE,
560 GFP_KERNEL);
561 if (!mdp->rx_skbuff) {
562 dev_err(&ndev->dev, "Cannot allocate Rx skb\n");
563 ret = -ENOMEM;
564 return ret;
565 }
566
567 mdp->tx_skbuff = kmalloc(sizeof(*mdp->tx_skbuff) * TX_RING_SIZE,
568 GFP_KERNEL);
569 if (!mdp->tx_skbuff) {
570 dev_err(&ndev->dev, "Cannot allocate Tx skb\n");
571 ret = -ENOMEM;
572 goto skb_ring_free;
573 }
574
575 /* Allocate all Rx descriptors. */
576 rx_ringsize = sizeof(struct sh_eth_rxdesc) * RX_RING_SIZE;
577 mdp->rx_ring = dma_alloc_coherent(NULL, rx_ringsize, &mdp->rx_desc_dma,
578 GFP_KERNEL);
579
580 if (!mdp->rx_ring) {
581 dev_err(&ndev->dev, "Cannot allocate Rx Ring (size %d bytes)\n",
582 rx_ringsize);
583 ret = -ENOMEM;
584 goto desc_ring_free;
585 }
586
587 mdp->dirty_rx = 0;
588
589 /* Allocate all Tx descriptors. */
590 tx_ringsize = sizeof(struct sh_eth_txdesc) * TX_RING_SIZE;
591 mdp->tx_ring = dma_alloc_coherent(NULL, tx_ringsize, &mdp->tx_desc_dma,
592 GFP_KERNEL);
593 if (!mdp->tx_ring) {
594 dev_err(&ndev->dev, "Cannot allocate Tx Ring (size %d bytes)\n",
595 tx_ringsize);
596 ret = -ENOMEM;
597 goto desc_ring_free;
598 }
599 return ret;
600
601 desc_ring_free:
602 /* free DMA buffer */
603 dma_free_coherent(NULL, rx_ringsize, mdp->rx_ring, mdp->rx_desc_dma);
604
605 skb_ring_free:
606 /* Free Rx and Tx skb ring buffer */
607 sh_eth_ring_free(ndev);
608
609 return ret;
610 }
611
612 static int sh_eth_dev_init(struct net_device *ndev)
613 {
614 int ret = 0;
615 struct sh_eth_private *mdp = netdev_priv(ndev);
616 u32 ioaddr = ndev->base_addr;
617 u_int32_t rx_int_var, tx_int_var;
618 u32 val;
619
620 /* Soft Reset */
621 sh_eth_reset(ndev);
622
623 /* Descriptor format */
624 sh_eth_ring_format(ndev);
625 if (mdp->cd->rpadir)
626 writel(mdp->cd->rpadir_value, ioaddr + RPADIR);
627
628 /* all sh_eth int mask */
629 writel(0, ioaddr + EESIPR);
630
631 #if defined(__LITTLE_ENDIAN__)
632 if (mdp->cd->hw_swap)
633 writel(EDMR_EL, ioaddr + EDMR);
634 else
635 #endif
636 writel(0, ioaddr + EDMR);
637
638 /* FIFO size set */
639 writel(mdp->cd->fdr_value, ioaddr + FDR);
640 writel(0, ioaddr + TFTR);
641
642 /* Frame recv control */
643 writel(mdp->cd->rmcr_value, ioaddr + RMCR);
644
645 rx_int_var = mdp->rx_int_var = DESC_I_RINT8 | DESC_I_RINT5;
646 tx_int_var = mdp->tx_int_var = DESC_I_TINT2;
647 writel(rx_int_var | tx_int_var, ioaddr + TRSCER);
648
649 if (mdp->cd->bculr)
650 writel(0x800, ioaddr + BCULR); /* Burst sycle set */
651
652 writel(mdp->cd->fcftr_value, ioaddr + FCFTR);
653
654 if (!mdp->cd->no_trimd)
655 writel(0, ioaddr + TRIMD);
656
657 /* Recv frame limit set register */
658 writel(RFLR_VALUE, ioaddr + RFLR);
659
660 writel(readl(ioaddr + EESR), ioaddr + EESR);
661 writel(mdp->cd->eesipr_value, ioaddr + EESIPR);
662
663 /* PAUSE Prohibition */
664 val = (readl(ioaddr + ECMR) & ECMR_DM) |
665 ECMR_ZPF | (mdp->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE;
666
667 writel(val, ioaddr + ECMR);
668
669 if (mdp->cd->set_rate)
670 mdp->cd->set_rate(ndev);
671
672 /* E-MAC Status Register clear */
673 writel(mdp->cd->ecsr_value, ioaddr + ECSR);
674
675 /* E-MAC Interrupt Enable register */
676 writel(mdp->cd->ecsipr_value, ioaddr + ECSIPR);
677
678 /* Set MAC address */
679 update_mac_address(ndev);
680
681 /* mask reset */
682 if (mdp->cd->apr)
683 writel(APR_AP, ioaddr + APR);
684 if (mdp->cd->mpr)
685 writel(MPR_MP, ioaddr + MPR);
686 if (mdp->cd->tpauser)
687 writel(TPAUSER_UNLIMITED, ioaddr + TPAUSER);
688
689 /* Setting the Rx mode will start the Rx process. */
690 writel(EDRRR_R, ioaddr + EDRRR);
691
692 netif_start_queue(ndev);
693
694 return ret;
695 }
696
697 /* free Tx skb function */
698 static int sh_eth_txfree(struct net_device *ndev)
699 {
700 struct sh_eth_private *mdp = netdev_priv(ndev);
701 struct sh_eth_txdesc *txdesc;
702 int freeNum = 0;
703 int entry = 0;
704
705 for (; mdp->cur_tx - mdp->dirty_tx > 0; mdp->dirty_tx++) {
706 entry = mdp->dirty_tx % TX_RING_SIZE;
707 txdesc = &mdp->tx_ring[entry];
708 if (txdesc->status & cpu_to_edmac(mdp, TD_TACT))
709 break;
710 /* Free the original skb. */
711 if (mdp->tx_skbuff[entry]) {
712 dev_kfree_skb_irq(mdp->tx_skbuff[entry]);
713 mdp->tx_skbuff[entry] = NULL;
714 freeNum++;
715 }
716 txdesc->status = cpu_to_edmac(mdp, TD_TFP);
717 if (entry >= TX_RING_SIZE - 1)
718 txdesc->status |= cpu_to_edmac(mdp, TD_TDLE);
719
720 mdp->stats.tx_packets++;
721 mdp->stats.tx_bytes += txdesc->buffer_length;
722 }
723 return freeNum;
724 }
725
726 /* Packet receive function */
727 static int sh_eth_rx(struct net_device *ndev)
728 {
729 struct sh_eth_private *mdp = netdev_priv(ndev);
730 struct sh_eth_rxdesc *rxdesc;
731
732 int entry = mdp->cur_rx % RX_RING_SIZE;
733 int boguscnt = (mdp->dirty_rx + RX_RING_SIZE) - mdp->cur_rx;
734 struct sk_buff *skb;
735 u16 pkt_len = 0;
736 u32 desc_status;
737
738 rxdesc = &mdp->rx_ring[entry];
739 while (!(rxdesc->status & cpu_to_edmac(mdp, RD_RACT))) {
740 desc_status = edmac_to_cpu(mdp, rxdesc->status);
741 pkt_len = rxdesc->frame_length;
742
743 if (--boguscnt < 0)
744 break;
745
746 if (!(desc_status & RDFEND))
747 mdp->stats.rx_length_errors++;
748
749 if (desc_status & (RD_RFS1 | RD_RFS2 | RD_RFS3 | RD_RFS4 |
750 RD_RFS5 | RD_RFS6 | RD_RFS10)) {
751 mdp->stats.rx_errors++;
752 if (desc_status & RD_RFS1)
753 mdp->stats.rx_crc_errors++;
754 if (desc_status & RD_RFS2)
755 mdp->stats.rx_frame_errors++;
756 if (desc_status & RD_RFS3)
757 mdp->stats.rx_length_errors++;
758 if (desc_status & RD_RFS4)
759 mdp->stats.rx_length_errors++;
760 if (desc_status & RD_RFS6)
761 mdp->stats.rx_missed_errors++;
762 if (desc_status & RD_RFS10)
763 mdp->stats.rx_over_errors++;
764 } else {
765 if (!mdp->cd->hw_swap)
766 sh_eth_soft_swap(
767 phys_to_virt(ALIGN(rxdesc->addr, 4)),
768 pkt_len + 2);
769 skb = mdp->rx_skbuff[entry];
770 mdp->rx_skbuff[entry] = NULL;
771 if (mdp->cd->rpadir)
772 skb_reserve(skb, NET_IP_ALIGN);
773 skb_put(skb, pkt_len);
774 skb->protocol = eth_type_trans(skb, ndev);
775 netif_rx(skb);
776 mdp->stats.rx_packets++;
777 mdp->stats.rx_bytes += pkt_len;
778 }
779 rxdesc->status |= cpu_to_edmac(mdp, RD_RACT);
780 entry = (++mdp->cur_rx) % RX_RING_SIZE;
781 rxdesc = &mdp->rx_ring[entry];
782 }
783
784 /* Refill the Rx ring buffers. */
785 for (; mdp->cur_rx - mdp->dirty_rx > 0; mdp->dirty_rx++) {
786 entry = mdp->dirty_rx % RX_RING_SIZE;
787 rxdesc = &mdp->rx_ring[entry];
788 /* The size of the buffer is 16 byte boundary. */
789 rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16);
790
791 if (mdp->rx_skbuff[entry] == NULL) {
792 skb = dev_alloc_skb(mdp->rx_buf_sz);
793 mdp->rx_skbuff[entry] = skb;
794 if (skb == NULL)
795 break; /* Better luck next round. */
796 dma_map_single(&ndev->dev, skb->tail, mdp->rx_buf_sz,
797 DMA_FROM_DEVICE);
798 skb->dev = ndev;
799 sh_eth_set_receive_align(skb);
800
801 skb_checksum_none_assert(skb);
802 rxdesc->addr = virt_to_phys(PTR_ALIGN(skb->data, 4));
803 }
804 if (entry >= RX_RING_SIZE - 1)
805 rxdesc->status |=
806 cpu_to_edmac(mdp, RD_RACT | RD_RFP | RD_RDEL);
807 else
808 rxdesc->status |=
809 cpu_to_edmac(mdp, RD_RACT | RD_RFP);
810 }
811
812 /* Restart Rx engine if stopped. */
813 /* If we don't need to check status, don't. -KDU */
814 if (!(readl(ndev->base_addr + EDRRR) & EDRRR_R))
815 writel(EDRRR_R, ndev->base_addr + EDRRR);
816
817 return 0;
818 }
819
820 /* error control function */
821 static void sh_eth_error(struct net_device *ndev, int intr_status)
822 {
823 struct sh_eth_private *mdp = netdev_priv(ndev);
824 u32 ioaddr = ndev->base_addr;
825 u32 felic_stat;
826 u32 link_stat;
827 u32 mask;
828
829 if (intr_status & EESR_ECI) {
830 felic_stat = readl(ioaddr + ECSR);
831 writel(felic_stat, ioaddr + ECSR); /* clear int */
832 if (felic_stat & ECSR_ICD)
833 mdp->stats.tx_carrier_errors++;
834 if (felic_stat & ECSR_LCHNG) {
835 /* Link Changed */
836 if (mdp->cd->no_psr || mdp->no_ether_link) {
837 if (mdp->link == PHY_DOWN)
838 link_stat = 0;
839 else
840 link_stat = PHY_ST_LINK;
841 } else {
842 link_stat = (readl(ioaddr + PSR));
843 if (mdp->ether_link_active_low)
844 link_stat = ~link_stat;
845 }
846 if (!(link_stat & PHY_ST_LINK)) {
847 /* Link Down : disable tx and rx */
848 writel(readl(ioaddr + ECMR) &
849 ~(ECMR_RE | ECMR_TE), ioaddr + ECMR);
850 } else {
851 /* Link Up */
852 writel(readl(ioaddr + EESIPR) &
853 ~DMAC_M_ECI, ioaddr + EESIPR);
854 /*clear int */
855 writel(readl(ioaddr + ECSR),
856 ioaddr + ECSR);
857 writel(readl(ioaddr + EESIPR) |
858 DMAC_M_ECI, ioaddr + EESIPR);
859 /* enable tx and rx */
860 writel(readl(ioaddr + ECMR) |
861 (ECMR_RE | ECMR_TE), ioaddr + ECMR);
862 }
863 }
864 }
865
866 if (intr_status & EESR_TWB) {
867 /* Write buck end. unused write back interrupt */
868 if (intr_status & EESR_TABT) /* Transmit Abort int */
869 mdp->stats.tx_aborted_errors++;
870 }
871
872 if (intr_status & EESR_RABT) {
873 /* Receive Abort int */
874 if (intr_status & EESR_RFRMER) {
875 /* Receive Frame Overflow int */
876 mdp->stats.rx_frame_errors++;
877 dev_err(&ndev->dev, "Receive Frame Overflow\n");
878 }
879 }
880
881 if (!mdp->cd->no_ade) {
882 if (intr_status & EESR_ADE && intr_status & EESR_TDE &&
883 intr_status & EESR_TFE)
884 mdp->stats.tx_fifo_errors++;
885 }
886
887 if (intr_status & EESR_RDE) {
888 /* Receive Descriptor Empty int */
889 mdp->stats.rx_over_errors++;
890
891 if (readl(ioaddr + EDRRR) ^ EDRRR_R)
892 writel(EDRRR_R, ioaddr + EDRRR);
893 dev_err(&ndev->dev, "Receive Descriptor Empty\n");
894 }
895 if (intr_status & EESR_RFE) {
896 /* Receive FIFO Overflow int */
897 mdp->stats.rx_fifo_errors++;
898 dev_err(&ndev->dev, "Receive FIFO Overflow\n");
899 }
900
901 mask = EESR_TWB | EESR_TABT | EESR_ADE | EESR_TDE | EESR_TFE;
902 if (mdp->cd->no_ade)
903 mask &= ~EESR_ADE;
904 if (intr_status & mask) {
905 /* Tx error */
906 u32 edtrr = readl(ndev->base_addr + EDTRR);
907 /* dmesg */
908 dev_err(&ndev->dev, "TX error. status=%8.8x cur_tx=%8.8x ",
909 intr_status, mdp->cur_tx);
910 dev_err(&ndev->dev, "dirty_tx=%8.8x state=%8.8x EDTRR=%8.8x.\n",
911 mdp->dirty_tx, (u32) ndev->state, edtrr);
912 /* dirty buffer free */
913 sh_eth_txfree(ndev);
914
915 /* SH7712 BUG */
916 if (edtrr ^ EDTRR_TRNS) {
917 /* tx dma start */
918 writel(EDTRR_TRNS, ndev->base_addr + EDTRR);
919 }
920 /* wakeup */
921 netif_wake_queue(ndev);
922 }
923 }
924
925 static irqreturn_t sh_eth_interrupt(int irq, void *netdev)
926 {
927 struct net_device *ndev = netdev;
928 struct sh_eth_private *mdp = netdev_priv(ndev);
929 struct sh_eth_cpu_data *cd = mdp->cd;
930 irqreturn_t ret = IRQ_NONE;
931 u32 ioaddr, intr_status = 0;
932
933 ioaddr = ndev->base_addr;
934 spin_lock(&mdp->lock);
935
936 /* Get interrpt stat */
937 intr_status = readl(ioaddr + EESR);
938 /* Clear interrupt */
939 if (intr_status & (EESR_FRC | EESR_RMAF | EESR_RRF |
940 EESR_RTLF | EESR_RTSF | EESR_PRE | EESR_CERF |
941 cd->tx_check | cd->eesr_err_check)) {
942 writel(intr_status, ioaddr + EESR);
943 ret = IRQ_HANDLED;
944 } else
945 goto other_irq;
946
947 if (intr_status & (EESR_FRC | /* Frame recv*/
948 EESR_RMAF | /* Multi cast address recv*/
949 EESR_RRF | /* Bit frame recv */
950 EESR_RTLF | /* Long frame recv*/
951 EESR_RTSF | /* short frame recv */
952 EESR_PRE | /* PHY-LSI recv error */
953 EESR_CERF)){ /* recv frame CRC error */
954 sh_eth_rx(ndev);
955 }
956
957 /* Tx Check */
958 if (intr_status & cd->tx_check) {
959 sh_eth_txfree(ndev);
960 netif_wake_queue(ndev);
961 }
962
963 if (intr_status & cd->eesr_err_check)
964 sh_eth_error(ndev, intr_status);
965
966 other_irq:
967 spin_unlock(&mdp->lock);
968
969 return ret;
970 }
971
972 static void sh_eth_timer(unsigned long data)
973 {
974 struct net_device *ndev = (struct net_device *)data;
975 struct sh_eth_private *mdp = netdev_priv(ndev);
976
977 mod_timer(&mdp->timer, jiffies + (10 * HZ));
978 }
979
980 /* PHY state control function */
981 static void sh_eth_adjust_link(struct net_device *ndev)
982 {
983 struct sh_eth_private *mdp = netdev_priv(ndev);
984 struct phy_device *phydev = mdp->phydev;
985 u32 ioaddr = ndev->base_addr;
986 int new_state = 0;
987
988 if (phydev->link != PHY_DOWN) {
989 if (phydev->duplex != mdp->duplex) {
990 new_state = 1;
991 mdp->duplex = phydev->duplex;
992 if (mdp->cd->set_duplex)
993 mdp->cd->set_duplex(ndev);
994 }
995
996 if (phydev->speed != mdp->speed) {
997 new_state = 1;
998 mdp->speed = phydev->speed;
999 if (mdp->cd->set_rate)
1000 mdp->cd->set_rate(ndev);
1001 }
1002 if (mdp->link == PHY_DOWN) {
1003 writel((readl(ioaddr + ECMR) & ~ECMR_TXF)
1004 | ECMR_DM, ioaddr + ECMR);
1005 new_state = 1;
1006 mdp->link = phydev->link;
1007 }
1008 } else if (mdp->link) {
1009 new_state = 1;
1010 mdp->link = PHY_DOWN;
1011 mdp->speed = 0;
1012 mdp->duplex = -1;
1013 }
1014
1015 if (new_state)
1016 phy_print_status(phydev);
1017 }
1018
1019 /* PHY init function */
1020 static int sh_eth_phy_init(struct net_device *ndev)
1021 {
1022 struct sh_eth_private *mdp = netdev_priv(ndev);
1023 char phy_id[MII_BUS_ID_SIZE + 3];
1024 struct phy_device *phydev = NULL;
1025
1026 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
1027 mdp->mii_bus->id , mdp->phy_id);
1028
1029 mdp->link = PHY_DOWN;
1030 mdp->speed = 0;
1031 mdp->duplex = -1;
1032
1033 /* Try connect to PHY */
1034 phydev = phy_connect(ndev, phy_id, sh_eth_adjust_link,
1035 0, PHY_INTERFACE_MODE_MII);
1036 if (IS_ERR(phydev)) {
1037 dev_err(&ndev->dev, "phy_connect failed\n");
1038 return PTR_ERR(phydev);
1039 }
1040
1041 dev_info(&ndev->dev, "attached phy %i to driver %s\n",
1042 phydev->addr, phydev->drv->name);
1043
1044 mdp->phydev = phydev;
1045
1046 return 0;
1047 }
1048
1049 /* PHY control start function */
1050 static int sh_eth_phy_start(struct net_device *ndev)
1051 {
1052 struct sh_eth_private *mdp = netdev_priv(ndev);
1053 int ret;
1054
1055 ret = sh_eth_phy_init(ndev);
1056 if (ret)
1057 return ret;
1058
1059 /* reset phy - this also wakes it from PDOWN */
1060 phy_write(mdp->phydev, MII_BMCR, BMCR_RESET);
1061 phy_start(mdp->phydev);
1062
1063 return 0;
1064 }
1065
1066 /* network device open function */
1067 static int sh_eth_open(struct net_device *ndev)
1068 {
1069 int ret = 0;
1070 struct sh_eth_private *mdp = netdev_priv(ndev);
1071
1072 pm_runtime_get_sync(&mdp->pdev->dev);
1073
1074 ret = request_irq(ndev->irq, sh_eth_interrupt,
1075 #if defined(CONFIG_CPU_SUBTYPE_SH7763) || \
1076 defined(CONFIG_CPU_SUBTYPE_SH7764) || \
1077 defined(CONFIG_CPU_SUBTYPE_SH7757)
1078 IRQF_SHARED,
1079 #else
1080 0,
1081 #endif
1082 ndev->name, ndev);
1083 if (ret) {
1084 dev_err(&ndev->dev, "Can not assign IRQ number\n");
1085 return ret;
1086 }
1087
1088 /* Descriptor set */
1089 ret = sh_eth_ring_init(ndev);
1090 if (ret)
1091 goto out_free_irq;
1092
1093 /* device init */
1094 ret = sh_eth_dev_init(ndev);
1095 if (ret)
1096 goto out_free_irq;
1097
1098 /* PHY control start*/
1099 ret = sh_eth_phy_start(ndev);
1100 if (ret)
1101 goto out_free_irq;
1102
1103 /* Set the timer to check for link beat. */
1104 init_timer(&mdp->timer);
1105 mdp->timer.expires = (jiffies + (24 * HZ)) / 10;/* 2.4 sec. */
1106 setup_timer(&mdp->timer, sh_eth_timer, (unsigned long)ndev);
1107
1108 return ret;
1109
1110 out_free_irq:
1111 free_irq(ndev->irq, ndev);
1112 pm_runtime_put_sync(&mdp->pdev->dev);
1113 return ret;
1114 }
1115
1116 /* Timeout function */
1117 static void sh_eth_tx_timeout(struct net_device *ndev)
1118 {
1119 struct sh_eth_private *mdp = netdev_priv(ndev);
1120 u32 ioaddr = ndev->base_addr;
1121 struct sh_eth_rxdesc *rxdesc;
1122 int i;
1123
1124 netif_stop_queue(ndev);
1125
1126 /* worning message out. */
1127 printk(KERN_WARNING "%s: transmit timed out, status %8.8x,"
1128 " resetting...\n", ndev->name, (int)readl(ioaddr + EESR));
1129
1130 /* tx_errors count up */
1131 mdp->stats.tx_errors++;
1132
1133 /* timer off */
1134 del_timer_sync(&mdp->timer);
1135
1136 /* Free all the skbuffs in the Rx queue. */
1137 for (i = 0; i < RX_RING_SIZE; i++) {
1138 rxdesc = &mdp->rx_ring[i];
1139 rxdesc->status = 0;
1140 rxdesc->addr = 0xBADF00D0;
1141 if (mdp->rx_skbuff[i])
1142 dev_kfree_skb(mdp->rx_skbuff[i]);
1143 mdp->rx_skbuff[i] = NULL;
1144 }
1145 for (i = 0; i < TX_RING_SIZE; i++) {
1146 if (mdp->tx_skbuff[i])
1147 dev_kfree_skb(mdp->tx_skbuff[i]);
1148 mdp->tx_skbuff[i] = NULL;
1149 }
1150
1151 /* device init */
1152 sh_eth_dev_init(ndev);
1153
1154 /* timer on */
1155 mdp->timer.expires = (jiffies + (24 * HZ)) / 10;/* 2.4 sec. */
1156 add_timer(&mdp->timer);
1157 }
1158
1159 /* Packet transmit function */
1160 static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1161 {
1162 struct sh_eth_private *mdp = netdev_priv(ndev);
1163 struct sh_eth_txdesc *txdesc;
1164 u32 entry;
1165 unsigned long flags;
1166
1167 spin_lock_irqsave(&mdp->lock, flags);
1168 if ((mdp->cur_tx - mdp->dirty_tx) >= (TX_RING_SIZE - 4)) {
1169 if (!sh_eth_txfree(ndev)) {
1170 netif_stop_queue(ndev);
1171 spin_unlock_irqrestore(&mdp->lock, flags);
1172 return NETDEV_TX_BUSY;
1173 }
1174 }
1175 spin_unlock_irqrestore(&mdp->lock, flags);
1176
1177 entry = mdp->cur_tx % TX_RING_SIZE;
1178 mdp->tx_skbuff[entry] = skb;
1179 txdesc = &mdp->tx_ring[entry];
1180 txdesc->addr = virt_to_phys(skb->data);
1181 /* soft swap. */
1182 if (!mdp->cd->hw_swap)
1183 sh_eth_soft_swap(phys_to_virt(ALIGN(txdesc->addr, 4)),
1184 skb->len + 2);
1185 /* write back */
1186 __flush_purge_region(skb->data, skb->len);
1187 if (skb->len < ETHERSMALL)
1188 txdesc->buffer_length = ETHERSMALL;
1189 else
1190 txdesc->buffer_length = skb->len;
1191
1192 if (entry >= TX_RING_SIZE - 1)
1193 txdesc->status |= cpu_to_edmac(mdp, TD_TACT | TD_TDLE);
1194 else
1195 txdesc->status |= cpu_to_edmac(mdp, TD_TACT);
1196
1197 mdp->cur_tx++;
1198
1199 if (!(readl(ndev->base_addr + EDTRR) & EDTRR_TRNS))
1200 writel(EDTRR_TRNS, ndev->base_addr + EDTRR);
1201
1202 return NETDEV_TX_OK;
1203 }
1204
1205 /* device close function */
1206 static int sh_eth_close(struct net_device *ndev)
1207 {
1208 struct sh_eth_private *mdp = netdev_priv(ndev);
1209 u32 ioaddr = ndev->base_addr;
1210 int ringsize;
1211
1212 netif_stop_queue(ndev);
1213
1214 /* Disable interrupts by clearing the interrupt mask. */
1215 writel(0x0000, ioaddr + EESIPR);
1216
1217 /* Stop the chip's Tx and Rx processes. */
1218 writel(0, ioaddr + EDTRR);
1219 writel(0, ioaddr + EDRRR);
1220
1221 /* PHY Disconnect */
1222 if (mdp->phydev) {
1223 phy_stop(mdp->phydev);
1224 phy_disconnect(mdp->phydev);
1225 }
1226
1227 free_irq(ndev->irq, ndev);
1228
1229 del_timer_sync(&mdp->timer);
1230
1231 /* Free all the skbuffs in the Rx queue. */
1232 sh_eth_ring_free(ndev);
1233
1234 /* free DMA buffer */
1235 ringsize = sizeof(struct sh_eth_rxdesc) * RX_RING_SIZE;
1236 dma_free_coherent(NULL, ringsize, mdp->rx_ring, mdp->rx_desc_dma);
1237
1238 /* free DMA buffer */
1239 ringsize = sizeof(struct sh_eth_txdesc) * TX_RING_SIZE;
1240 dma_free_coherent(NULL, ringsize, mdp->tx_ring, mdp->tx_desc_dma);
1241
1242 pm_runtime_put_sync(&mdp->pdev->dev);
1243
1244 return 0;
1245 }
1246
1247 static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev)
1248 {
1249 struct sh_eth_private *mdp = netdev_priv(ndev);
1250 u32 ioaddr = ndev->base_addr;
1251
1252 pm_runtime_get_sync(&mdp->pdev->dev);
1253
1254 mdp->stats.tx_dropped += readl(ioaddr + TROCR);
1255 writel(0, ioaddr + TROCR); /* (write clear) */
1256 mdp->stats.collisions += readl(ioaddr + CDCR);
1257 writel(0, ioaddr + CDCR); /* (write clear) */
1258 mdp->stats.tx_carrier_errors += readl(ioaddr + LCCR);
1259 writel(0, ioaddr + LCCR); /* (write clear) */
1260 #if defined(CONFIG_CPU_SUBTYPE_SH7763)
1261 mdp->stats.tx_carrier_errors += readl(ioaddr + CERCR);/* CERCR */
1262 writel(0, ioaddr + CERCR); /* (write clear) */
1263 mdp->stats.tx_carrier_errors += readl(ioaddr + CEECR);/* CEECR */
1264 writel(0, ioaddr + CEECR); /* (write clear) */
1265 #else
1266 mdp->stats.tx_carrier_errors += readl(ioaddr + CNDCR);
1267 writel(0, ioaddr + CNDCR); /* (write clear) */
1268 #endif
1269 pm_runtime_put_sync(&mdp->pdev->dev);
1270
1271 return &mdp->stats;
1272 }
1273
1274 /* ioctl to device funciotn*/
1275 static int sh_eth_do_ioctl(struct net_device *ndev, struct ifreq *rq,
1276 int cmd)
1277 {
1278 struct sh_eth_private *mdp = netdev_priv(ndev);
1279 struct phy_device *phydev = mdp->phydev;
1280
1281 if (!netif_running(ndev))
1282 return -EINVAL;
1283
1284 if (!phydev)
1285 return -ENODEV;
1286
1287 return phy_mii_ioctl(phydev, rq, cmd);
1288 }
1289
1290 #if defined(SH_ETH_HAS_TSU)
1291 /* Multicast reception directions set */
1292 static void sh_eth_set_multicast_list(struct net_device *ndev)
1293 {
1294 u32 ioaddr = ndev->base_addr;
1295
1296 if (ndev->flags & IFF_PROMISC) {
1297 /* Set promiscuous. */
1298 writel((readl(ioaddr + ECMR) & ~ECMR_MCT) | ECMR_PRM,
1299 ioaddr + ECMR);
1300 } else {
1301 /* Normal, unicast/broadcast-only mode. */
1302 writel((readl(ioaddr + ECMR) & ~ECMR_PRM) | ECMR_MCT,
1303 ioaddr + ECMR);
1304 }
1305 }
1306
1307 /* SuperH's TSU register init function */
1308 static void sh_eth_tsu_init(u32 ioaddr)
1309 {
1310 writel(0, ioaddr + TSU_FWEN0); /* Disable forward(0->1) */
1311 writel(0, ioaddr + TSU_FWEN1); /* Disable forward(1->0) */
1312 writel(0, ioaddr + TSU_FCM); /* forward fifo 3k-3k */
1313 writel(0xc, ioaddr + TSU_BSYSL0);
1314 writel(0xc, ioaddr + TSU_BSYSL1);
1315 writel(0, ioaddr + TSU_PRISL0);
1316 writel(0, ioaddr + TSU_PRISL1);
1317 writel(0, ioaddr + TSU_FWSL0);
1318 writel(0, ioaddr + TSU_FWSL1);
1319 writel(TSU_FWSLC_POSTENU | TSU_FWSLC_POSTENL, ioaddr + TSU_FWSLC);
1320 #if defined(CONFIG_CPU_SUBTYPE_SH7763)
1321 writel(0, ioaddr + TSU_QTAG0); /* Disable QTAG(0->1) */
1322 writel(0, ioaddr + TSU_QTAG1); /* Disable QTAG(1->0) */
1323 #else
1324 writel(0, ioaddr + TSU_QTAGM0); /* Disable QTAG(0->1) */
1325 writel(0, ioaddr + TSU_QTAGM1); /* Disable QTAG(1->0) */
1326 #endif
1327 writel(0, ioaddr + TSU_FWSR); /* all interrupt status clear */
1328 writel(0, ioaddr + TSU_FWINMK); /* Disable all interrupt */
1329 writel(0, ioaddr + TSU_TEN); /* Disable all CAM entry */
1330 writel(0, ioaddr + TSU_POST1); /* Disable CAM entry [ 0- 7] */
1331 writel(0, ioaddr + TSU_POST2); /* Disable CAM entry [ 8-15] */
1332 writel(0, ioaddr + TSU_POST3); /* Disable CAM entry [16-23] */
1333 writel(0, ioaddr + TSU_POST4); /* Disable CAM entry [24-31] */
1334 }
1335 #endif /* SH_ETH_HAS_TSU */
1336
1337 /* MDIO bus release function */
1338 static int sh_mdio_release(struct net_device *ndev)
1339 {
1340 struct mii_bus *bus = dev_get_drvdata(&ndev->dev);
1341
1342 /* unregister mdio bus */
1343 mdiobus_unregister(bus);
1344
1345 /* remove mdio bus info from net_device */
1346 dev_set_drvdata(&ndev->dev, NULL);
1347
1348 /* free interrupts memory */
1349 kfree(bus->irq);
1350
1351 /* free bitbang info */
1352 free_mdio_bitbang(bus);
1353
1354 return 0;
1355 }
1356
1357 /* MDIO bus init function */
1358 static int sh_mdio_init(struct net_device *ndev, int id)
1359 {
1360 int ret, i;
1361 struct bb_info *bitbang;
1362 struct sh_eth_private *mdp = netdev_priv(ndev);
1363
1364 /* create bit control struct for PHY */
1365 bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL);
1366 if (!bitbang) {
1367 ret = -ENOMEM;
1368 goto out;
1369 }
1370
1371 /* bitbang init */
1372 bitbang->addr = ndev->base_addr + PIR;
1373 bitbang->mdi_msk = 0x08;
1374 bitbang->mdo_msk = 0x04;
1375 bitbang->mmd_msk = 0x02;/* MMD */
1376 bitbang->mdc_msk = 0x01;
1377 bitbang->ctrl.ops = &bb_ops;
1378
1379 /* MII controller setting */
1380 mdp->mii_bus = alloc_mdio_bitbang(&bitbang->ctrl);
1381 if (!mdp->mii_bus) {
1382 ret = -ENOMEM;
1383 goto out_free_bitbang;
1384 }
1385
1386 /* Hook up MII support for ethtool */
1387 mdp->mii_bus->name = "sh_mii";
1388 mdp->mii_bus->parent = &ndev->dev;
1389 snprintf(mdp->mii_bus->id, MII_BUS_ID_SIZE, "%x", id);
1390
1391 /* PHY IRQ */
1392 mdp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
1393 if (!mdp->mii_bus->irq) {
1394 ret = -ENOMEM;
1395 goto out_free_bus;
1396 }
1397
1398 for (i = 0; i < PHY_MAX_ADDR; i++)
1399 mdp->mii_bus->irq[i] = PHY_POLL;
1400
1401 /* regist mdio bus */
1402 ret = mdiobus_register(mdp->mii_bus);
1403 if (ret)
1404 goto out_free_irq;
1405
1406 dev_set_drvdata(&ndev->dev, mdp->mii_bus);
1407
1408 return 0;
1409
1410 out_free_irq:
1411 kfree(mdp->mii_bus->irq);
1412
1413 out_free_bus:
1414 free_mdio_bitbang(mdp->mii_bus);
1415
1416 out_free_bitbang:
1417 kfree(bitbang);
1418
1419 out:
1420 return ret;
1421 }
1422
1423 static const struct net_device_ops sh_eth_netdev_ops = {
1424 .ndo_open = sh_eth_open,
1425 .ndo_stop = sh_eth_close,
1426 .ndo_start_xmit = sh_eth_start_xmit,
1427 .ndo_get_stats = sh_eth_get_stats,
1428 #if defined(SH_ETH_HAS_TSU)
1429 .ndo_set_multicast_list = sh_eth_set_multicast_list,
1430 #endif
1431 .ndo_tx_timeout = sh_eth_tx_timeout,
1432 .ndo_do_ioctl = sh_eth_do_ioctl,
1433 .ndo_validate_addr = eth_validate_addr,
1434 .ndo_set_mac_address = eth_mac_addr,
1435 .ndo_change_mtu = eth_change_mtu,
1436 };
1437
1438 static int sh_eth_drv_probe(struct platform_device *pdev)
1439 {
1440 int ret, devno = 0;
1441 struct resource *res;
1442 struct net_device *ndev = NULL;
1443 struct sh_eth_private *mdp;
1444 struct sh_eth_plat_data *pd;
1445
1446 /* get base addr */
1447 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1448 if (unlikely(res == NULL)) {
1449 dev_err(&pdev->dev, "invalid resource\n");
1450 ret = -EINVAL;
1451 goto out;
1452 }
1453
1454 ndev = alloc_etherdev(sizeof(struct sh_eth_private));
1455 if (!ndev) {
1456 dev_err(&pdev->dev, "Could not allocate device.\n");
1457 ret = -ENOMEM;
1458 goto out;
1459 }
1460
1461 /* The sh Ether-specific entries in the device structure. */
1462 ndev->base_addr = res->start;
1463 devno = pdev->id;
1464 if (devno < 0)
1465 devno = 0;
1466
1467 ndev->dma = -1;
1468 ret = platform_get_irq(pdev, 0);
1469 if (ret < 0) {
1470 ret = -ENODEV;
1471 goto out_release;
1472 }
1473 ndev->irq = ret;
1474
1475 SET_NETDEV_DEV(ndev, &pdev->dev);
1476
1477 /* Fill in the fields of the device structure with ethernet values. */
1478 ether_setup(ndev);
1479
1480 mdp = netdev_priv(ndev);
1481 spin_lock_init(&mdp->lock);
1482 mdp->pdev = pdev;
1483 pm_runtime_enable(&pdev->dev);
1484 pm_runtime_resume(&pdev->dev);
1485
1486 pd = (struct sh_eth_plat_data *)(pdev->dev.platform_data);
1487 /* get PHY ID */
1488 mdp->phy_id = pd->phy;
1489 /* EDMAC endian */
1490 mdp->edmac_endian = pd->edmac_endian;
1491 mdp->no_ether_link = pd->no_ether_link;
1492 mdp->ether_link_active_low = pd->ether_link_active_low;
1493
1494 /* set cpu data */
1495 mdp->cd = &sh_eth_my_cpu_data;
1496 sh_eth_set_default_cpu_data(mdp->cd);
1497
1498 /* set function */
1499 ndev->netdev_ops = &sh_eth_netdev_ops;
1500 ndev->watchdog_timeo = TX_TIMEOUT;
1501
1502 mdp->post_rx = POST_RX >> (devno << 1);
1503 mdp->post_fw = POST_FW >> (devno << 1);
1504
1505 /* read and set MAC address */
1506 read_mac_address(ndev, pd->mac_addr);
1507
1508 /* First device only init */
1509 if (!devno) {
1510 if (mdp->cd->chip_reset)
1511 mdp->cd->chip_reset(ndev);
1512
1513 #if defined(SH_ETH_HAS_TSU)
1514 /* TSU init (Init only)*/
1515 sh_eth_tsu_init(SH_TSU_ADDR);
1516 #endif
1517 }
1518
1519 /* network device register */
1520 ret = register_netdev(ndev);
1521 if (ret)
1522 goto out_release;
1523
1524 /* mdio bus init */
1525 ret = sh_mdio_init(ndev, pdev->id);
1526 if (ret)
1527 goto out_unregister;
1528
1529 /* print device infomation */
1530 pr_info("Base address at 0x%x, %pM, IRQ %d.\n",
1531 (u32)ndev->base_addr, ndev->dev_addr, ndev->irq);
1532
1533 platform_set_drvdata(pdev, ndev);
1534
1535 return ret;
1536
1537 out_unregister:
1538 unregister_netdev(ndev);
1539
1540 out_release:
1541 /* net_dev free */
1542 if (ndev)
1543 free_netdev(ndev);
1544
1545 out:
1546 return ret;
1547 }
1548
1549 static int sh_eth_drv_remove(struct platform_device *pdev)
1550 {
1551 struct net_device *ndev = platform_get_drvdata(pdev);
1552
1553 sh_mdio_release(ndev);
1554 unregister_netdev(ndev);
1555 pm_runtime_disable(&pdev->dev);
1556 free_netdev(ndev);
1557 platform_set_drvdata(pdev, NULL);
1558
1559 return 0;
1560 }
1561
1562 static int sh_eth_runtime_nop(struct device *dev)
1563 {
1564 /*
1565 * Runtime PM callback shared between ->runtime_suspend()
1566 * and ->runtime_resume(). Simply returns success.
1567 *
1568 * This driver re-initializes all registers after
1569 * pm_runtime_get_sync() anyway so there is no need
1570 * to save and restore registers here.
1571 */
1572 return 0;
1573 }
1574
1575 static struct dev_pm_ops sh_eth_dev_pm_ops = {
1576 .runtime_suspend = sh_eth_runtime_nop,
1577 .runtime_resume = sh_eth_runtime_nop,
1578 };
1579
1580 static struct platform_driver sh_eth_driver = {
1581 .probe = sh_eth_drv_probe,
1582 .remove = sh_eth_drv_remove,
1583 .driver = {
1584 .name = CARDNAME,
1585 .pm = &sh_eth_dev_pm_ops,
1586 },
1587 };
1588
1589 static int __init sh_eth_init(void)
1590 {
1591 return platform_driver_register(&sh_eth_driver);
1592 }
1593
1594 static void __exit sh_eth_cleanup(void)
1595 {
1596 platform_driver_unregister(&sh_eth_driver);
1597 }
1598
1599 module_init(sh_eth_init);
1600 module_exit(sh_eth_cleanup);
1601
1602 MODULE_AUTHOR("Nobuhiro Iwamatsu, Yoshihiro Shimoda");
1603 MODULE_DESCRIPTION("Renesas SuperH Ethernet driver");
1604 MODULE_LICENSE("GPL v2");
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