2 * SuperH Ethernet device driver
4 * Copyright (C) 2006-2008 Nobuhiro Iwamatsu
5 * Copyright (C) 2008-2009 Renesas Solutions Corp.
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.
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
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.
19 * The full GNU General Public License is included in this distribution in
20 * the file called "COPYING".
23 #include <linux/init.h>
24 #include <linux/module.h>
25 #include <linux/kernel.h>
26 #include <linux/spinlock.h>
27 #include <linux/interrupt.h>
28 #include <linux/dma-mapping.h>
29 #include <linux/etherdevice.h>
30 #include <linux/delay.h>
31 #include <linux/platform_device.h>
32 #include <linux/mdio-bitbang.h>
33 #include <linux/netdevice.h>
34 #include <linux/phy.h>
35 #include <linux/cache.h>
37 #include <linux/pm_runtime.h>
38 #include <linux/slab.h>
39 #include <linux/ethtool.h>
40 #include <linux/if_vlan.h>
41 #include <linux/sh_eth.h>
45 #define SH_ETH_DEF_MSG_ENABLE \
51 /* There is CPU dependent code */
52 #if defined(CONFIG_CPU_SUBTYPE_SH7724)
53 #define SH_ETH_RESET_DEFAULT 1
54 static void sh_eth_set_duplex(struct net_device *ndev)
56 struct sh_eth_private *mdp = netdev_priv(ndev);
58 if (mdp->duplex) /* Full */
59 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | ECMR_DM, ECMR);
61 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) & ~ECMR_DM, ECMR);
64 static void sh_eth_set_rate(struct net_device *ndev)
66 struct sh_eth_private *mdp = netdev_priv(ndev);
70 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) & ~ECMR_RTM, ECMR);
72 case 100:/* 100BASE */
73 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | ECMR_RTM, ECMR);
81 static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
82 .set_duplex = sh_eth_set_duplex,
83 .set_rate = sh_eth_set_rate,
85 .ecsr_value = ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
86 .ecsipr_value = ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
87 .eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x01ff009f,
89 .tx_check = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
90 .eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RDE |
91 EESR_RFRMER | EESR_TFE | EESR_TDE | EESR_ECI,
92 .tx_error_check = EESR_TWB | EESR_TABT | EESR_TDE | EESR_TFE,
99 .rpadir_value = 0x00020000, /* NET_IP_ALIGN assumed to be 2 */
101 #elif defined(CONFIG_CPU_SUBTYPE_SH7757)
102 #define SH_ETH_HAS_BOTH_MODULES 1
103 #define SH_ETH_HAS_TSU 1
104 static void sh_eth_set_duplex(struct net_device *ndev)
106 struct sh_eth_private *mdp = netdev_priv(ndev);
108 if (mdp->duplex) /* Full */
109 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | ECMR_DM, ECMR);
111 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) & ~ECMR_DM, ECMR);
114 static void sh_eth_set_rate(struct net_device *ndev)
116 struct sh_eth_private *mdp = netdev_priv(ndev);
118 switch (mdp->speed) {
119 case 10: /* 10BASE */
120 sh_eth_write(ndev, 0, RTRATE);
122 case 100:/* 100BASE */
123 sh_eth_write(ndev, 1, RTRATE);
131 static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
132 .set_duplex = sh_eth_set_duplex,
133 .set_rate = sh_eth_set_rate,
135 .eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
136 .rmcr_value = 0x00000001,
138 .tx_check = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
139 .eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RDE |
140 EESR_RFRMER | EESR_TFE | EESR_TDE | EESR_ECI,
141 .tx_error_check = EESR_TWB | EESR_TABT | EESR_TDE | EESR_TFE,
149 .rpadir_value = 2 << 16,
152 #define SH_GIGA_ETH_BASE 0xfee00000
153 #define GIGA_MALR(port) (SH_GIGA_ETH_BASE + 0x800 * (port) + 0x05c8)
154 #define GIGA_MAHR(port) (SH_GIGA_ETH_BASE + 0x800 * (port) + 0x05c0)
155 static void sh_eth_chip_reset_giga(struct net_device *ndev)
158 unsigned long mahr[2], malr[2];
160 /* save MAHR and MALR */
161 for (i = 0; i < 2; i++) {
162 malr[i] = ioread32((void *)GIGA_MALR(i));
163 mahr[i] = ioread32((void *)GIGA_MAHR(i));
167 iowrite32(ARSTR_ARSTR, (void *)(SH_GIGA_ETH_BASE + 0x1800));
170 /* restore MAHR and MALR */
171 for (i = 0; i < 2; i++) {
172 iowrite32(malr[i], (void *)GIGA_MALR(i));
173 iowrite32(mahr[i], (void *)GIGA_MAHR(i));
177 static int sh_eth_is_gether(struct sh_eth_private *mdp);
178 static void sh_eth_reset(struct net_device *ndev)
180 struct sh_eth_private *mdp = netdev_priv(ndev);
183 if (sh_eth_is_gether(mdp)) {
184 sh_eth_write(ndev, 0x03, EDSR);
185 sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_GETHER,
188 if (!(sh_eth_read(ndev, EDMR) & 0x3))
194 printk(KERN_ERR "Device reset fail\n");
197 sh_eth_write(ndev, 0x0, TDLAR);
198 sh_eth_write(ndev, 0x0, TDFAR);
199 sh_eth_write(ndev, 0x0, TDFXR);
200 sh_eth_write(ndev, 0x0, TDFFR);
201 sh_eth_write(ndev, 0x0, RDLAR);
202 sh_eth_write(ndev, 0x0, RDFAR);
203 sh_eth_write(ndev, 0x0, RDFXR);
204 sh_eth_write(ndev, 0x0, RDFFR);
206 sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_ETHER,
209 sh_eth_write(ndev, sh_eth_read(ndev, EDMR) & ~EDMR_SRST_ETHER,
214 static void sh_eth_set_duplex_giga(struct net_device *ndev)
216 struct sh_eth_private *mdp = netdev_priv(ndev);
218 if (mdp->duplex) /* Full */
219 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | ECMR_DM, ECMR);
221 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) & ~ECMR_DM, ECMR);
224 static void sh_eth_set_rate_giga(struct net_device *ndev)
226 struct sh_eth_private *mdp = netdev_priv(ndev);
228 switch (mdp->speed) {
229 case 10: /* 10BASE */
230 sh_eth_write(ndev, 0x00000000, GECMR);
232 case 100:/* 100BASE */
233 sh_eth_write(ndev, 0x00000010, GECMR);
235 case 1000: /* 1000BASE */
236 sh_eth_write(ndev, 0x00000020, GECMR);
243 /* SH7757(GETHERC) */
244 static struct sh_eth_cpu_data sh_eth_my_cpu_data_giga = {
245 .chip_reset = sh_eth_chip_reset_giga,
246 .set_duplex = sh_eth_set_duplex_giga,
247 .set_rate = sh_eth_set_rate_giga,
249 .ecsr_value = ECSR_ICD | ECSR_MPD,
250 .ecsipr_value = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
251 .eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
253 .tx_check = EESR_TC1 | EESR_FTC,
254 .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT | \
255 EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE | \
257 .tx_error_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_TDE | \
259 .fdr_value = 0x0000072f,
260 .rmcr_value = 0x00000001,
268 .rpadir_value = 2 << 16,
274 static struct sh_eth_cpu_data *sh_eth_get_cpu_data(struct sh_eth_private *mdp)
276 if (sh_eth_is_gether(mdp))
277 return &sh_eth_my_cpu_data_giga;
279 return &sh_eth_my_cpu_data;
282 #elif defined(CONFIG_CPU_SUBTYPE_SH7763)
283 #define SH_ETH_HAS_TSU 1
284 static void sh_eth_chip_reset(struct net_device *ndev)
286 struct sh_eth_private *mdp = netdev_priv(ndev);
289 sh_eth_tsu_write(mdp, ARSTR_ARSTR, ARSTR);
293 static void sh_eth_reset(struct net_device *ndev)
297 sh_eth_write(ndev, EDSR_ENALL, EDSR);
298 sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_GETHER, EDMR);
300 if (!(sh_eth_read(ndev, EDMR) & 0x3))
306 printk(KERN_ERR "Device reset fail\n");
309 sh_eth_write(ndev, 0x0, TDLAR);
310 sh_eth_write(ndev, 0x0, TDFAR);
311 sh_eth_write(ndev, 0x0, TDFXR);
312 sh_eth_write(ndev, 0x0, TDFFR);
313 sh_eth_write(ndev, 0x0, RDLAR);
314 sh_eth_write(ndev, 0x0, RDFAR);
315 sh_eth_write(ndev, 0x0, RDFXR);
316 sh_eth_write(ndev, 0x0, RDFFR);
319 static void sh_eth_set_duplex(struct net_device *ndev)
321 struct sh_eth_private *mdp = netdev_priv(ndev);
323 if (mdp->duplex) /* Full */
324 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | ECMR_DM, ECMR);
326 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) & ~ECMR_DM, ECMR);
329 static void sh_eth_set_rate(struct net_device *ndev)
331 struct sh_eth_private *mdp = netdev_priv(ndev);
333 switch (mdp->speed) {
334 case 10: /* 10BASE */
335 sh_eth_write(ndev, GECMR_10, GECMR);
337 case 100:/* 100BASE */
338 sh_eth_write(ndev, GECMR_100, GECMR);
340 case 1000: /* 1000BASE */
341 sh_eth_write(ndev, GECMR_1000, GECMR);
349 static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
350 .chip_reset = sh_eth_chip_reset,
351 .set_duplex = sh_eth_set_duplex,
352 .set_rate = sh_eth_set_rate,
354 .ecsr_value = ECSR_ICD | ECSR_MPD,
355 .ecsipr_value = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
356 .eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
358 .tx_check = EESR_TC1 | EESR_FTC,
359 .eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT | \
360 EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE | \
362 .tx_error_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_TDE | \
375 #elif defined(CONFIG_CPU_SUBTYPE_SH7619)
376 #define SH_ETH_RESET_DEFAULT 1
377 static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
378 .eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
385 #elif defined(CONFIG_CPU_SUBTYPE_SH7710) || defined(CONFIG_CPU_SUBTYPE_SH7712)
386 #define SH_ETH_RESET_DEFAULT 1
387 #define SH_ETH_HAS_TSU 1
388 static struct sh_eth_cpu_data sh_eth_my_cpu_data = {
389 .eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
394 static void sh_eth_set_default_cpu_data(struct sh_eth_cpu_data *cd)
397 cd->ecsr_value = DEFAULT_ECSR_INIT;
399 if (!cd->ecsipr_value)
400 cd->ecsipr_value = DEFAULT_ECSIPR_INIT;
402 if (!cd->fcftr_value)
403 cd->fcftr_value = DEFAULT_FIFO_F_D_RFF | \
404 DEFAULT_FIFO_F_D_RFD;
407 cd->fdr_value = DEFAULT_FDR_INIT;
410 cd->rmcr_value = DEFAULT_RMCR_VALUE;
413 cd->tx_check = DEFAULT_TX_CHECK;
415 if (!cd->eesr_err_check)
416 cd->eesr_err_check = DEFAULT_EESR_ERR_CHECK;
418 if (!cd->tx_error_check)
419 cd->tx_error_check = DEFAULT_TX_ERROR_CHECK;
422 #if defined(SH_ETH_RESET_DEFAULT)
424 static void sh_eth_reset(struct net_device *ndev)
426 sh_eth_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_ETHER, EDMR);
428 sh_eth_write(ndev, sh_eth_read(ndev, EDMR) & ~EDMR_SRST_ETHER, EDMR);
432 #if defined(CONFIG_CPU_SH4)
433 static void sh_eth_set_receive_align(struct sk_buff *skb)
437 reserve = SH4_SKB_RX_ALIGN - ((u32)skb->data & (SH4_SKB_RX_ALIGN - 1));
439 skb_reserve(skb, reserve);
442 static void sh_eth_set_receive_align(struct sk_buff *skb)
444 skb_reserve(skb, SH2_SH3_SKB_RX_ALIGN);
449 /* CPU <-> EDMAC endian convert */
450 static inline __u32 cpu_to_edmac(struct sh_eth_private *mdp, u32 x)
452 switch (mdp->edmac_endian) {
453 case EDMAC_LITTLE_ENDIAN:
454 return cpu_to_le32(x);
455 case EDMAC_BIG_ENDIAN:
456 return cpu_to_be32(x);
461 static inline __u32 edmac_to_cpu(struct sh_eth_private *mdp, u32 x)
463 switch (mdp->edmac_endian) {
464 case EDMAC_LITTLE_ENDIAN:
465 return le32_to_cpu(x);
466 case EDMAC_BIG_ENDIAN:
467 return be32_to_cpu(x);
473 * Program the hardware MAC address from dev->dev_addr.
475 static void update_mac_address(struct net_device *ndev)
478 (ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) |
479 (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR);
481 (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]), MALR);
485 * Get MAC address from SuperH MAC address register
487 * SuperH's Ethernet device doesn't have 'ROM' to MAC address.
488 * This driver get MAC address that use by bootloader(U-boot or sh-ipl+g).
489 * When you want use this device, you must set MAC address in bootloader.
492 static void read_mac_address(struct net_device *ndev, unsigned char *mac)
494 if (mac[0] || mac[1] || mac[2] || mac[3] || mac[4] || mac[5]) {
495 memcpy(ndev->dev_addr, mac, 6);
497 ndev->dev_addr[0] = (sh_eth_read(ndev, MAHR) >> 24);
498 ndev->dev_addr[1] = (sh_eth_read(ndev, MAHR) >> 16) & 0xFF;
499 ndev->dev_addr[2] = (sh_eth_read(ndev, MAHR) >> 8) & 0xFF;
500 ndev->dev_addr[3] = (sh_eth_read(ndev, MAHR) & 0xFF);
501 ndev->dev_addr[4] = (sh_eth_read(ndev, MALR) >> 8) & 0xFF;
502 ndev->dev_addr[5] = (sh_eth_read(ndev, MALR) & 0xFF);
506 static int sh_eth_is_gether(struct sh_eth_private *mdp)
508 if (mdp->reg_offset == sh_eth_offset_gigabit)
514 static unsigned long sh_eth_get_edtrr_trns(struct sh_eth_private *mdp)
516 if (sh_eth_is_gether(mdp))
517 return EDTRR_TRNS_GETHER;
519 return EDTRR_TRNS_ETHER;
523 void (*set_gate)(void *addr);
524 struct mdiobb_ctrl ctrl;
526 u32 mmd_msk;/* MMD */
533 static void bb_set(void *addr, u32 msk)
535 iowrite32(ioread32(addr) | msk, addr);
539 static void bb_clr(void *addr, u32 msk)
541 iowrite32((ioread32(addr) & ~msk), addr);
545 static int bb_read(void *addr, u32 msk)
547 return (ioread32(addr) & msk) != 0;
550 /* Data I/O pin control */
551 static void sh_mmd_ctrl(struct mdiobb_ctrl *ctrl, int bit)
553 struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
555 if (bitbang->set_gate)
556 bitbang->set_gate(bitbang->addr);
559 bb_set(bitbang->addr, bitbang->mmd_msk);
561 bb_clr(bitbang->addr, bitbang->mmd_msk);
565 static void sh_set_mdio(struct mdiobb_ctrl *ctrl, int bit)
567 struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
569 if (bitbang->set_gate)
570 bitbang->set_gate(bitbang->addr);
573 bb_set(bitbang->addr, bitbang->mdo_msk);
575 bb_clr(bitbang->addr, bitbang->mdo_msk);
579 static int sh_get_mdio(struct mdiobb_ctrl *ctrl)
581 struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
583 if (bitbang->set_gate)
584 bitbang->set_gate(bitbang->addr);
586 return bb_read(bitbang->addr, bitbang->mdi_msk);
589 /* MDC pin control */
590 static void sh_mdc_ctrl(struct mdiobb_ctrl *ctrl, int bit)
592 struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
594 if (bitbang->set_gate)
595 bitbang->set_gate(bitbang->addr);
598 bb_set(bitbang->addr, bitbang->mdc_msk);
600 bb_clr(bitbang->addr, bitbang->mdc_msk);
603 /* mdio bus control struct */
604 static struct mdiobb_ops bb_ops = {
605 .owner = THIS_MODULE,
606 .set_mdc = sh_mdc_ctrl,
607 .set_mdio_dir = sh_mmd_ctrl,
608 .set_mdio_data = sh_set_mdio,
609 .get_mdio_data = sh_get_mdio,
612 /* free skb and descriptor buffer */
613 static void sh_eth_ring_free(struct net_device *ndev)
615 struct sh_eth_private *mdp = netdev_priv(ndev);
618 /* Free Rx skb ringbuffer */
619 if (mdp->rx_skbuff) {
620 for (i = 0; i < RX_RING_SIZE; i++) {
621 if (mdp->rx_skbuff[i])
622 dev_kfree_skb(mdp->rx_skbuff[i]);
625 kfree(mdp->rx_skbuff);
627 /* Free Tx skb ringbuffer */
628 if (mdp->tx_skbuff) {
629 for (i = 0; i < TX_RING_SIZE; i++) {
630 if (mdp->tx_skbuff[i])
631 dev_kfree_skb(mdp->tx_skbuff[i]);
634 kfree(mdp->tx_skbuff);
637 /* format skb and descriptor buffer */
638 static void sh_eth_ring_format(struct net_device *ndev)
640 struct sh_eth_private *mdp = netdev_priv(ndev);
643 struct sh_eth_rxdesc *rxdesc = NULL;
644 struct sh_eth_txdesc *txdesc = NULL;
645 int rx_ringsize = sizeof(*rxdesc) * RX_RING_SIZE;
646 int tx_ringsize = sizeof(*txdesc) * TX_RING_SIZE;
648 mdp->cur_rx = mdp->cur_tx = 0;
649 mdp->dirty_rx = mdp->dirty_tx = 0;
651 memset(mdp->rx_ring, 0, rx_ringsize);
653 /* build Rx ring buffer */
654 for (i = 0; i < RX_RING_SIZE; i++) {
656 mdp->rx_skbuff[i] = NULL;
657 skb = netdev_alloc_skb(ndev, mdp->rx_buf_sz);
658 mdp->rx_skbuff[i] = skb;
661 dma_map_single(&ndev->dev, skb->data, mdp->rx_buf_sz,
663 sh_eth_set_receive_align(skb);
666 rxdesc = &mdp->rx_ring[i];
667 rxdesc->addr = virt_to_phys(PTR_ALIGN(skb->data, 4));
668 rxdesc->status = cpu_to_edmac(mdp, RD_RACT | RD_RFP);
670 /* The size of the buffer is 16 byte boundary. */
671 rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16);
672 /* Rx descriptor address set */
674 sh_eth_write(ndev, mdp->rx_desc_dma, RDLAR);
675 if (sh_eth_is_gether(mdp))
676 sh_eth_write(ndev, mdp->rx_desc_dma, RDFAR);
680 mdp->dirty_rx = (u32) (i - RX_RING_SIZE);
682 /* Mark the last entry as wrapping the ring. */
683 rxdesc->status |= cpu_to_edmac(mdp, RD_RDEL);
685 memset(mdp->tx_ring, 0, tx_ringsize);
687 /* build Tx ring buffer */
688 for (i = 0; i < TX_RING_SIZE; i++) {
689 mdp->tx_skbuff[i] = NULL;
690 txdesc = &mdp->tx_ring[i];
691 txdesc->status = cpu_to_edmac(mdp, TD_TFP);
692 txdesc->buffer_length = 0;
694 /* Tx descriptor address set */
695 sh_eth_write(ndev, mdp->tx_desc_dma, TDLAR);
696 if (sh_eth_is_gether(mdp))
697 sh_eth_write(ndev, mdp->tx_desc_dma, TDFAR);
701 txdesc->status |= cpu_to_edmac(mdp, TD_TDLE);
704 /* Get skb and descriptor buffer */
705 static int sh_eth_ring_init(struct net_device *ndev)
707 struct sh_eth_private *mdp = netdev_priv(ndev);
708 int rx_ringsize, tx_ringsize, ret = 0;
711 * +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
712 * card needs room to do 8 byte alignment, +2 so we can reserve
713 * the first 2 bytes, and +16 gets room for the status word from the
716 mdp->rx_buf_sz = (ndev->mtu <= 1492 ? PKT_BUF_SZ :
717 (((ndev->mtu + 26 + 7) & ~7) + 2 + 16));
719 mdp->rx_buf_sz += NET_IP_ALIGN;
721 /* Allocate RX and TX skb rings */
722 mdp->rx_skbuff = kmalloc(sizeof(*mdp->rx_skbuff) * RX_RING_SIZE,
724 if (!mdp->rx_skbuff) {
725 dev_err(&ndev->dev, "Cannot allocate Rx skb\n");
730 mdp->tx_skbuff = kmalloc(sizeof(*mdp->tx_skbuff) * TX_RING_SIZE,
732 if (!mdp->tx_skbuff) {
733 dev_err(&ndev->dev, "Cannot allocate Tx skb\n");
738 /* Allocate all Rx descriptors. */
739 rx_ringsize = sizeof(struct sh_eth_rxdesc) * RX_RING_SIZE;
740 mdp->rx_ring = dma_alloc_coherent(NULL, rx_ringsize, &mdp->rx_desc_dma,
744 dev_err(&ndev->dev, "Cannot allocate Rx Ring (size %d bytes)\n",
752 /* Allocate all Tx descriptors. */
753 tx_ringsize = sizeof(struct sh_eth_txdesc) * TX_RING_SIZE;
754 mdp->tx_ring = dma_alloc_coherent(NULL, tx_ringsize, &mdp->tx_desc_dma,
757 dev_err(&ndev->dev, "Cannot allocate Tx Ring (size %d bytes)\n",
765 /* free DMA buffer */
766 dma_free_coherent(NULL, rx_ringsize, mdp->rx_ring, mdp->rx_desc_dma);
769 /* Free Rx and Tx skb ring buffer */
770 sh_eth_ring_free(ndev);
775 static int sh_eth_dev_init(struct net_device *ndev)
778 struct sh_eth_private *mdp = netdev_priv(ndev);
779 u_int32_t rx_int_var, tx_int_var;
785 /* Descriptor format */
786 sh_eth_ring_format(ndev);
788 sh_eth_write(ndev, mdp->cd->rpadir_value, RPADIR);
790 /* all sh_eth int mask */
791 sh_eth_write(ndev, 0, EESIPR);
793 #if defined(__LITTLE_ENDIAN__)
794 if (mdp->cd->hw_swap)
795 sh_eth_write(ndev, EDMR_EL, EDMR);
798 sh_eth_write(ndev, 0, EDMR);
801 sh_eth_write(ndev, mdp->cd->fdr_value, FDR);
802 sh_eth_write(ndev, 0, TFTR);
804 /* Frame recv control */
805 sh_eth_write(ndev, mdp->cd->rmcr_value, RMCR);
807 rx_int_var = mdp->rx_int_var = DESC_I_RINT8 | DESC_I_RINT5;
808 tx_int_var = mdp->tx_int_var = DESC_I_TINT2;
809 sh_eth_write(ndev, rx_int_var | tx_int_var, TRSCER);
812 sh_eth_write(ndev, 0x800, BCULR); /* Burst sycle set */
814 sh_eth_write(ndev, mdp->cd->fcftr_value, FCFTR);
816 if (!mdp->cd->no_trimd)
817 sh_eth_write(ndev, 0, TRIMD);
819 /* Recv frame limit set register */
820 sh_eth_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN,
823 sh_eth_write(ndev, sh_eth_read(ndev, EESR), EESR);
824 sh_eth_write(ndev, mdp->cd->eesipr_value, EESIPR);
826 /* PAUSE Prohibition */
827 val = (sh_eth_read(ndev, ECMR) & ECMR_DM) |
828 ECMR_ZPF | (mdp->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE;
830 sh_eth_write(ndev, val, ECMR);
832 if (mdp->cd->set_rate)
833 mdp->cd->set_rate(ndev);
835 /* E-MAC Status Register clear */
836 sh_eth_write(ndev, mdp->cd->ecsr_value, ECSR);
838 /* E-MAC Interrupt Enable register */
839 sh_eth_write(ndev, mdp->cd->ecsipr_value, ECSIPR);
841 /* Set MAC address */
842 update_mac_address(ndev);
846 sh_eth_write(ndev, APR_AP, APR);
848 sh_eth_write(ndev, MPR_MP, MPR);
849 if (mdp->cd->tpauser)
850 sh_eth_write(ndev, TPAUSER_UNLIMITED, TPAUSER);
852 /* Setting the Rx mode will start the Rx process. */
853 sh_eth_write(ndev, EDRRR_R, EDRRR);
855 netif_start_queue(ndev);
860 /* free Tx skb function */
861 static int sh_eth_txfree(struct net_device *ndev)
863 struct sh_eth_private *mdp = netdev_priv(ndev);
864 struct sh_eth_txdesc *txdesc;
868 for (; mdp->cur_tx - mdp->dirty_tx > 0; mdp->dirty_tx++) {
869 entry = mdp->dirty_tx % TX_RING_SIZE;
870 txdesc = &mdp->tx_ring[entry];
871 if (txdesc->status & cpu_to_edmac(mdp, TD_TACT))
873 /* Free the original skb. */
874 if (mdp->tx_skbuff[entry]) {
875 dma_unmap_single(&ndev->dev, txdesc->addr,
876 txdesc->buffer_length, DMA_TO_DEVICE);
877 dev_kfree_skb_irq(mdp->tx_skbuff[entry]);
878 mdp->tx_skbuff[entry] = NULL;
881 txdesc->status = cpu_to_edmac(mdp, TD_TFP);
882 if (entry >= TX_RING_SIZE - 1)
883 txdesc->status |= cpu_to_edmac(mdp, TD_TDLE);
885 ndev->stats.tx_packets++;
886 ndev->stats.tx_bytes += txdesc->buffer_length;
891 /* Packet receive function */
892 static int sh_eth_rx(struct net_device *ndev)
894 struct sh_eth_private *mdp = netdev_priv(ndev);
895 struct sh_eth_rxdesc *rxdesc;
897 int entry = mdp->cur_rx % RX_RING_SIZE;
898 int boguscnt = (mdp->dirty_rx + RX_RING_SIZE) - mdp->cur_rx;
903 rxdesc = &mdp->rx_ring[entry];
904 while (!(rxdesc->status & cpu_to_edmac(mdp, RD_RACT))) {
905 desc_status = edmac_to_cpu(mdp, rxdesc->status);
906 pkt_len = rxdesc->frame_length;
911 if (!(desc_status & RDFEND))
912 ndev->stats.rx_length_errors++;
914 if (desc_status & (RD_RFS1 | RD_RFS2 | RD_RFS3 | RD_RFS4 |
915 RD_RFS5 | RD_RFS6 | RD_RFS10)) {
916 ndev->stats.rx_errors++;
917 if (desc_status & RD_RFS1)
918 ndev->stats.rx_crc_errors++;
919 if (desc_status & RD_RFS2)
920 ndev->stats.rx_frame_errors++;
921 if (desc_status & RD_RFS3)
922 ndev->stats.rx_length_errors++;
923 if (desc_status & RD_RFS4)
924 ndev->stats.rx_length_errors++;
925 if (desc_status & RD_RFS6)
926 ndev->stats.rx_missed_errors++;
927 if (desc_status & RD_RFS10)
928 ndev->stats.rx_over_errors++;
930 if (!mdp->cd->hw_swap)
932 phys_to_virt(ALIGN(rxdesc->addr, 4)),
934 skb = mdp->rx_skbuff[entry];
935 mdp->rx_skbuff[entry] = NULL;
937 skb_reserve(skb, NET_IP_ALIGN);
938 skb_put(skb, pkt_len);
939 skb->protocol = eth_type_trans(skb, ndev);
941 ndev->stats.rx_packets++;
942 ndev->stats.rx_bytes += pkt_len;
944 rxdesc->status |= cpu_to_edmac(mdp, RD_RACT);
945 entry = (++mdp->cur_rx) % RX_RING_SIZE;
946 rxdesc = &mdp->rx_ring[entry];
949 /* Refill the Rx ring buffers. */
950 for (; mdp->cur_rx - mdp->dirty_rx > 0; mdp->dirty_rx++) {
951 entry = mdp->dirty_rx % RX_RING_SIZE;
952 rxdesc = &mdp->rx_ring[entry];
953 /* The size of the buffer is 16 byte boundary. */
954 rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16);
956 if (mdp->rx_skbuff[entry] == NULL) {
957 skb = netdev_alloc_skb(ndev, mdp->rx_buf_sz);
958 mdp->rx_skbuff[entry] = skb;
960 break; /* Better luck next round. */
961 dma_map_single(&ndev->dev, skb->data, mdp->rx_buf_sz,
963 sh_eth_set_receive_align(skb);
965 skb_checksum_none_assert(skb);
966 rxdesc->addr = virt_to_phys(PTR_ALIGN(skb->data, 4));
968 if (entry >= RX_RING_SIZE - 1)
970 cpu_to_edmac(mdp, RD_RACT | RD_RFP | RD_RDEL);
973 cpu_to_edmac(mdp, RD_RACT | RD_RFP);
976 /* Restart Rx engine if stopped. */
977 /* If we don't need to check status, don't. -KDU */
978 if (!(sh_eth_read(ndev, EDRRR) & EDRRR_R))
979 sh_eth_write(ndev, EDRRR_R, EDRRR);
984 static void sh_eth_rcv_snd_disable(struct net_device *ndev)
986 /* disable tx and rx */
987 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) &
988 ~(ECMR_RE | ECMR_TE), ECMR);
991 static void sh_eth_rcv_snd_enable(struct net_device *ndev)
993 /* enable tx and rx */
994 sh_eth_write(ndev, sh_eth_read(ndev, ECMR) |
995 (ECMR_RE | ECMR_TE), ECMR);
998 /* error control function */
999 static void sh_eth_error(struct net_device *ndev, int intr_status)
1001 struct sh_eth_private *mdp = netdev_priv(ndev);
1006 if (intr_status & EESR_ECI) {
1007 felic_stat = sh_eth_read(ndev, ECSR);
1008 sh_eth_write(ndev, felic_stat, ECSR); /* clear int */
1009 if (felic_stat & ECSR_ICD)
1010 ndev->stats.tx_carrier_errors++;
1011 if (felic_stat & ECSR_LCHNG) {
1013 if (mdp->cd->no_psr || mdp->no_ether_link) {
1014 if (mdp->link == PHY_DOWN)
1017 link_stat = PHY_ST_LINK;
1019 link_stat = (sh_eth_read(ndev, PSR));
1020 if (mdp->ether_link_active_low)
1021 link_stat = ~link_stat;
1023 if (!(link_stat & PHY_ST_LINK))
1024 sh_eth_rcv_snd_disable(ndev);
1027 sh_eth_write(ndev, sh_eth_read(ndev, EESIPR) &
1028 ~DMAC_M_ECI, EESIPR);
1030 sh_eth_write(ndev, sh_eth_read(ndev, ECSR),
1032 sh_eth_write(ndev, sh_eth_read(ndev, EESIPR) |
1033 DMAC_M_ECI, EESIPR);
1034 /* enable tx and rx */
1035 sh_eth_rcv_snd_enable(ndev);
1040 if (intr_status & EESR_TWB) {
1041 /* Write buck end. unused write back interrupt */
1042 if (intr_status & EESR_TABT) /* Transmit Abort int */
1043 ndev->stats.tx_aborted_errors++;
1044 if (netif_msg_tx_err(mdp))
1045 dev_err(&ndev->dev, "Transmit Abort\n");
1048 if (intr_status & EESR_RABT) {
1049 /* Receive Abort int */
1050 if (intr_status & EESR_RFRMER) {
1051 /* Receive Frame Overflow int */
1052 ndev->stats.rx_frame_errors++;
1053 if (netif_msg_rx_err(mdp))
1054 dev_err(&ndev->dev, "Receive Abort\n");
1058 if (intr_status & EESR_TDE) {
1059 /* Transmit Descriptor Empty int */
1060 ndev->stats.tx_fifo_errors++;
1061 if (netif_msg_tx_err(mdp))
1062 dev_err(&ndev->dev, "Transmit Descriptor Empty\n");
1065 if (intr_status & EESR_TFE) {
1066 /* FIFO under flow */
1067 ndev->stats.tx_fifo_errors++;
1068 if (netif_msg_tx_err(mdp))
1069 dev_err(&ndev->dev, "Transmit FIFO Under flow\n");
1072 if (intr_status & EESR_RDE) {
1073 /* Receive Descriptor Empty int */
1074 ndev->stats.rx_over_errors++;
1076 if (sh_eth_read(ndev, EDRRR) ^ EDRRR_R)
1077 sh_eth_write(ndev, EDRRR_R, EDRRR);
1078 if (netif_msg_rx_err(mdp))
1079 dev_err(&ndev->dev, "Receive Descriptor Empty\n");
1082 if (intr_status & EESR_RFE) {
1083 /* Receive FIFO Overflow int */
1084 ndev->stats.rx_fifo_errors++;
1085 if (netif_msg_rx_err(mdp))
1086 dev_err(&ndev->dev, "Receive FIFO Overflow\n");
1089 if (!mdp->cd->no_ade && (intr_status & EESR_ADE)) {
1091 ndev->stats.tx_fifo_errors++;
1092 if (netif_msg_tx_err(mdp))
1093 dev_err(&ndev->dev, "Address Error\n");
1096 mask = EESR_TWB | EESR_TABT | EESR_ADE | EESR_TDE | EESR_TFE;
1097 if (mdp->cd->no_ade)
1099 if (intr_status & mask) {
1101 u32 edtrr = sh_eth_read(ndev, EDTRR);
1103 dev_err(&ndev->dev, "TX error. status=%8.8x cur_tx=%8.8x ",
1104 intr_status, mdp->cur_tx);
1105 dev_err(&ndev->dev, "dirty_tx=%8.8x state=%8.8x EDTRR=%8.8x.\n",
1106 mdp->dirty_tx, (u32) ndev->state, edtrr);
1107 /* dirty buffer free */
1108 sh_eth_txfree(ndev);
1111 if (edtrr ^ sh_eth_get_edtrr_trns(mdp)) {
1113 sh_eth_write(ndev, sh_eth_get_edtrr_trns(mdp), EDTRR);
1116 netif_wake_queue(ndev);
1120 static irqreturn_t sh_eth_interrupt(int irq, void *netdev)
1122 struct net_device *ndev = netdev;
1123 struct sh_eth_private *mdp = netdev_priv(ndev);
1124 struct sh_eth_cpu_data *cd = mdp->cd;
1125 irqreturn_t ret = IRQ_NONE;
1126 u32 intr_status = 0;
1128 spin_lock(&mdp->lock);
1130 /* Get interrpt stat */
1131 intr_status = sh_eth_read(ndev, EESR);
1132 /* Clear interrupt */
1133 if (intr_status & (EESR_FRC | EESR_RMAF | EESR_RRF |
1134 EESR_RTLF | EESR_RTSF | EESR_PRE | EESR_CERF |
1135 cd->tx_check | cd->eesr_err_check)) {
1136 sh_eth_write(ndev, intr_status, EESR);
1141 if (intr_status & (EESR_FRC | /* Frame recv*/
1142 EESR_RMAF | /* Multi cast address recv*/
1143 EESR_RRF | /* Bit frame recv */
1144 EESR_RTLF | /* Long frame recv*/
1145 EESR_RTSF | /* short frame recv */
1146 EESR_PRE | /* PHY-LSI recv error */
1147 EESR_CERF)){ /* recv frame CRC error */
1152 if (intr_status & cd->tx_check) {
1153 sh_eth_txfree(ndev);
1154 netif_wake_queue(ndev);
1157 if (intr_status & cd->eesr_err_check)
1158 sh_eth_error(ndev, intr_status);
1161 spin_unlock(&mdp->lock);
1166 static void sh_eth_timer(unsigned long data)
1168 struct net_device *ndev = (struct net_device *)data;
1169 struct sh_eth_private *mdp = netdev_priv(ndev);
1171 mod_timer(&mdp->timer, jiffies + (10 * HZ));
1174 /* PHY state control function */
1175 static void sh_eth_adjust_link(struct net_device *ndev)
1177 struct sh_eth_private *mdp = netdev_priv(ndev);
1178 struct phy_device *phydev = mdp->phydev;
1181 if (phydev->link != PHY_DOWN) {
1182 if (phydev->duplex != mdp->duplex) {
1184 mdp->duplex = phydev->duplex;
1185 if (mdp->cd->set_duplex)
1186 mdp->cd->set_duplex(ndev);
1189 if (phydev->speed != mdp->speed) {
1191 mdp->speed = phydev->speed;
1192 if (mdp->cd->set_rate)
1193 mdp->cd->set_rate(ndev);
1195 if (mdp->link == PHY_DOWN) {
1197 (sh_eth_read(ndev, ECMR) & ~ECMR_TXF), ECMR);
1199 mdp->link = phydev->link;
1201 } else if (mdp->link) {
1203 mdp->link = PHY_DOWN;
1208 if (new_state && netif_msg_link(mdp))
1209 phy_print_status(phydev);
1212 /* PHY init function */
1213 static int sh_eth_phy_init(struct net_device *ndev)
1215 struct sh_eth_private *mdp = netdev_priv(ndev);
1216 char phy_id[MII_BUS_ID_SIZE + 3];
1217 struct phy_device *phydev = NULL;
1219 snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
1220 mdp->mii_bus->id , mdp->phy_id);
1222 mdp->link = PHY_DOWN;
1226 /* Try connect to PHY */
1227 phydev = phy_connect(ndev, phy_id, sh_eth_adjust_link,
1228 0, mdp->phy_interface);
1229 if (IS_ERR(phydev)) {
1230 dev_err(&ndev->dev, "phy_connect failed\n");
1231 return PTR_ERR(phydev);
1234 dev_info(&ndev->dev, "attached phy %i to driver %s\n",
1235 phydev->addr, phydev->drv->name);
1237 mdp->phydev = phydev;
1242 /* PHY control start function */
1243 static int sh_eth_phy_start(struct net_device *ndev)
1245 struct sh_eth_private *mdp = netdev_priv(ndev);
1248 ret = sh_eth_phy_init(ndev);
1252 /* reset phy - this also wakes it from PDOWN */
1253 phy_write(mdp->phydev, MII_BMCR, BMCR_RESET);
1254 phy_start(mdp->phydev);
1259 static int sh_eth_get_settings(struct net_device *ndev,
1260 struct ethtool_cmd *ecmd)
1262 struct sh_eth_private *mdp = netdev_priv(ndev);
1263 unsigned long flags;
1266 spin_lock_irqsave(&mdp->lock, flags);
1267 ret = phy_ethtool_gset(mdp->phydev, ecmd);
1268 spin_unlock_irqrestore(&mdp->lock, flags);
1273 static int sh_eth_set_settings(struct net_device *ndev,
1274 struct ethtool_cmd *ecmd)
1276 struct sh_eth_private *mdp = netdev_priv(ndev);
1277 unsigned long flags;
1280 spin_lock_irqsave(&mdp->lock, flags);
1282 /* disable tx and rx */
1283 sh_eth_rcv_snd_disable(ndev);
1285 ret = phy_ethtool_sset(mdp->phydev, ecmd);
1289 if (ecmd->duplex == DUPLEX_FULL)
1294 if (mdp->cd->set_duplex)
1295 mdp->cd->set_duplex(ndev);
1300 /* enable tx and rx */
1301 sh_eth_rcv_snd_enable(ndev);
1303 spin_unlock_irqrestore(&mdp->lock, flags);
1308 static int sh_eth_nway_reset(struct net_device *ndev)
1310 struct sh_eth_private *mdp = netdev_priv(ndev);
1311 unsigned long flags;
1314 spin_lock_irqsave(&mdp->lock, flags);
1315 ret = phy_start_aneg(mdp->phydev);
1316 spin_unlock_irqrestore(&mdp->lock, flags);
1321 static u32 sh_eth_get_msglevel(struct net_device *ndev)
1323 struct sh_eth_private *mdp = netdev_priv(ndev);
1324 return mdp->msg_enable;
1327 static void sh_eth_set_msglevel(struct net_device *ndev, u32 value)
1329 struct sh_eth_private *mdp = netdev_priv(ndev);
1330 mdp->msg_enable = value;
1333 static const char sh_eth_gstrings_stats[][ETH_GSTRING_LEN] = {
1334 "rx_current", "tx_current",
1335 "rx_dirty", "tx_dirty",
1337 #define SH_ETH_STATS_LEN ARRAY_SIZE(sh_eth_gstrings_stats)
1339 static int sh_eth_get_sset_count(struct net_device *netdev, int sset)
1343 return SH_ETH_STATS_LEN;
1349 static void sh_eth_get_ethtool_stats(struct net_device *ndev,
1350 struct ethtool_stats *stats, u64 *data)
1352 struct sh_eth_private *mdp = netdev_priv(ndev);
1355 /* device-specific stats */
1356 data[i++] = mdp->cur_rx;
1357 data[i++] = mdp->cur_tx;
1358 data[i++] = mdp->dirty_rx;
1359 data[i++] = mdp->dirty_tx;
1362 static void sh_eth_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
1364 switch (stringset) {
1366 memcpy(data, *sh_eth_gstrings_stats,
1367 sizeof(sh_eth_gstrings_stats));
1372 static const struct ethtool_ops sh_eth_ethtool_ops = {
1373 .get_settings = sh_eth_get_settings,
1374 .set_settings = sh_eth_set_settings,
1375 .nway_reset = sh_eth_nway_reset,
1376 .get_msglevel = sh_eth_get_msglevel,
1377 .set_msglevel = sh_eth_set_msglevel,
1378 .get_link = ethtool_op_get_link,
1379 .get_strings = sh_eth_get_strings,
1380 .get_ethtool_stats = sh_eth_get_ethtool_stats,
1381 .get_sset_count = sh_eth_get_sset_count,
1384 /* network device open function */
1385 static int sh_eth_open(struct net_device *ndev)
1388 struct sh_eth_private *mdp = netdev_priv(ndev);
1390 pm_runtime_get_sync(&mdp->pdev->dev);
1392 ret = request_irq(ndev->irq, sh_eth_interrupt,
1393 #if defined(CONFIG_CPU_SUBTYPE_SH7763) || \
1394 defined(CONFIG_CPU_SUBTYPE_SH7764) || \
1395 defined(CONFIG_CPU_SUBTYPE_SH7757)
1402 dev_err(&ndev->dev, "Can not assign IRQ number\n");
1406 /* Descriptor set */
1407 ret = sh_eth_ring_init(ndev);
1412 ret = sh_eth_dev_init(ndev);
1416 /* PHY control start*/
1417 ret = sh_eth_phy_start(ndev);
1421 /* Set the timer to check for link beat. */
1422 init_timer(&mdp->timer);
1423 mdp->timer.expires = (jiffies + (24 * HZ)) / 10;/* 2.4 sec. */
1424 setup_timer(&mdp->timer, sh_eth_timer, (unsigned long)ndev);
1429 free_irq(ndev->irq, ndev);
1430 pm_runtime_put_sync(&mdp->pdev->dev);
1434 /* Timeout function */
1435 static void sh_eth_tx_timeout(struct net_device *ndev)
1437 struct sh_eth_private *mdp = netdev_priv(ndev);
1438 struct sh_eth_rxdesc *rxdesc;
1441 netif_stop_queue(ndev);
1443 if (netif_msg_timer(mdp))
1444 dev_err(&ndev->dev, "%s: transmit timed out, status %8.8x,"
1445 " resetting...\n", ndev->name, (int)sh_eth_read(ndev, EESR));
1447 /* tx_errors count up */
1448 ndev->stats.tx_errors++;
1451 del_timer_sync(&mdp->timer);
1453 /* Free all the skbuffs in the Rx queue. */
1454 for (i = 0; i < RX_RING_SIZE; i++) {
1455 rxdesc = &mdp->rx_ring[i];
1457 rxdesc->addr = 0xBADF00D0;
1458 if (mdp->rx_skbuff[i])
1459 dev_kfree_skb(mdp->rx_skbuff[i]);
1460 mdp->rx_skbuff[i] = NULL;
1462 for (i = 0; i < TX_RING_SIZE; i++) {
1463 if (mdp->tx_skbuff[i])
1464 dev_kfree_skb(mdp->tx_skbuff[i]);
1465 mdp->tx_skbuff[i] = NULL;
1469 sh_eth_dev_init(ndev);
1472 mdp->timer.expires = (jiffies + (24 * HZ)) / 10;/* 2.4 sec. */
1473 add_timer(&mdp->timer);
1476 /* Packet transmit function */
1477 static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1479 struct sh_eth_private *mdp = netdev_priv(ndev);
1480 struct sh_eth_txdesc *txdesc;
1482 unsigned long flags;
1484 spin_lock_irqsave(&mdp->lock, flags);
1485 if ((mdp->cur_tx - mdp->dirty_tx) >= (TX_RING_SIZE - 4)) {
1486 if (!sh_eth_txfree(ndev)) {
1487 if (netif_msg_tx_queued(mdp))
1488 dev_warn(&ndev->dev, "TxFD exhausted.\n");
1489 netif_stop_queue(ndev);
1490 spin_unlock_irqrestore(&mdp->lock, flags);
1491 return NETDEV_TX_BUSY;
1494 spin_unlock_irqrestore(&mdp->lock, flags);
1496 entry = mdp->cur_tx % TX_RING_SIZE;
1497 mdp->tx_skbuff[entry] = skb;
1498 txdesc = &mdp->tx_ring[entry];
1500 if (!mdp->cd->hw_swap)
1501 sh_eth_soft_swap(phys_to_virt(ALIGN(txdesc->addr, 4)),
1503 txdesc->addr = dma_map_single(&ndev->dev, skb->data, skb->len,
1505 if (skb->len < ETHERSMALL)
1506 txdesc->buffer_length = ETHERSMALL;
1508 txdesc->buffer_length = skb->len;
1510 if (entry >= TX_RING_SIZE - 1)
1511 txdesc->status |= cpu_to_edmac(mdp, TD_TACT | TD_TDLE);
1513 txdesc->status |= cpu_to_edmac(mdp, TD_TACT);
1517 if (!(sh_eth_read(ndev, EDTRR) & sh_eth_get_edtrr_trns(mdp)))
1518 sh_eth_write(ndev, sh_eth_get_edtrr_trns(mdp), EDTRR);
1520 return NETDEV_TX_OK;
1523 /* device close function */
1524 static int sh_eth_close(struct net_device *ndev)
1526 struct sh_eth_private *mdp = netdev_priv(ndev);
1529 netif_stop_queue(ndev);
1531 /* Disable interrupts by clearing the interrupt mask. */
1532 sh_eth_write(ndev, 0x0000, EESIPR);
1534 /* Stop the chip's Tx and Rx processes. */
1535 sh_eth_write(ndev, 0, EDTRR);
1536 sh_eth_write(ndev, 0, EDRRR);
1538 /* PHY Disconnect */
1540 phy_stop(mdp->phydev);
1541 phy_disconnect(mdp->phydev);
1544 free_irq(ndev->irq, ndev);
1546 del_timer_sync(&mdp->timer);
1548 /* Free all the skbuffs in the Rx queue. */
1549 sh_eth_ring_free(ndev);
1551 /* free DMA buffer */
1552 ringsize = sizeof(struct sh_eth_rxdesc) * RX_RING_SIZE;
1553 dma_free_coherent(NULL, ringsize, mdp->rx_ring, mdp->rx_desc_dma);
1555 /* free DMA buffer */
1556 ringsize = sizeof(struct sh_eth_txdesc) * TX_RING_SIZE;
1557 dma_free_coherent(NULL, ringsize, mdp->tx_ring, mdp->tx_desc_dma);
1559 pm_runtime_put_sync(&mdp->pdev->dev);
1564 static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev)
1566 struct sh_eth_private *mdp = netdev_priv(ndev);
1568 pm_runtime_get_sync(&mdp->pdev->dev);
1570 ndev->stats.tx_dropped += sh_eth_read(ndev, TROCR);
1571 sh_eth_write(ndev, 0, TROCR); /* (write clear) */
1572 ndev->stats.collisions += sh_eth_read(ndev, CDCR);
1573 sh_eth_write(ndev, 0, CDCR); /* (write clear) */
1574 ndev->stats.tx_carrier_errors += sh_eth_read(ndev, LCCR);
1575 sh_eth_write(ndev, 0, LCCR); /* (write clear) */
1576 if (sh_eth_is_gether(mdp)) {
1577 ndev->stats.tx_carrier_errors += sh_eth_read(ndev, CERCR);
1578 sh_eth_write(ndev, 0, CERCR); /* (write clear) */
1579 ndev->stats.tx_carrier_errors += sh_eth_read(ndev, CEECR);
1580 sh_eth_write(ndev, 0, CEECR); /* (write clear) */
1582 ndev->stats.tx_carrier_errors += sh_eth_read(ndev, CNDCR);
1583 sh_eth_write(ndev, 0, CNDCR); /* (write clear) */
1585 pm_runtime_put_sync(&mdp->pdev->dev);
1587 return &ndev->stats;
1590 /* ioctl to device function */
1591 static int sh_eth_do_ioctl(struct net_device *ndev, struct ifreq *rq,
1594 struct sh_eth_private *mdp = netdev_priv(ndev);
1595 struct phy_device *phydev = mdp->phydev;
1597 if (!netif_running(ndev))
1603 return phy_mii_ioctl(phydev, rq, cmd);
1606 #if defined(SH_ETH_HAS_TSU)
1607 /* For TSU_POSTn. Please refer to the manual about this (strange) bitfields */
1608 static void *sh_eth_tsu_get_post_reg_offset(struct sh_eth_private *mdp,
1611 return sh_eth_tsu_get_offset(mdp, TSU_POST1) + (entry / 8 * 4);
1614 static u32 sh_eth_tsu_get_post_mask(int entry)
1616 return 0x0f << (28 - ((entry % 8) * 4));
1619 static u32 sh_eth_tsu_get_post_bit(struct sh_eth_private *mdp, int entry)
1621 return (0x08 >> (mdp->port << 1)) << (28 - ((entry % 8) * 4));
1624 static void sh_eth_tsu_enable_cam_entry_post(struct net_device *ndev,
1627 struct sh_eth_private *mdp = netdev_priv(ndev);
1631 reg_offset = sh_eth_tsu_get_post_reg_offset(mdp, entry);
1632 tmp = ioread32(reg_offset);
1633 iowrite32(tmp | sh_eth_tsu_get_post_bit(mdp, entry), reg_offset);
1636 static bool sh_eth_tsu_disable_cam_entry_post(struct net_device *ndev,
1639 struct sh_eth_private *mdp = netdev_priv(ndev);
1640 u32 post_mask, ref_mask, tmp;
1643 reg_offset = sh_eth_tsu_get_post_reg_offset(mdp, entry);
1644 post_mask = sh_eth_tsu_get_post_mask(entry);
1645 ref_mask = sh_eth_tsu_get_post_bit(mdp, entry) & ~post_mask;
1647 tmp = ioread32(reg_offset);
1648 iowrite32(tmp & ~post_mask, reg_offset);
1650 /* If other port enables, the function returns "true" */
1651 return tmp & ref_mask;
1654 static int sh_eth_tsu_busy(struct net_device *ndev)
1656 int timeout = SH_ETH_TSU_TIMEOUT_MS * 100;
1657 struct sh_eth_private *mdp = netdev_priv(ndev);
1659 while ((sh_eth_tsu_read(mdp, TSU_ADSBSY) & TSU_ADSBSY_0)) {
1663 dev_err(&ndev->dev, "%s: timeout\n", __func__);
1671 static int sh_eth_tsu_write_entry(struct net_device *ndev, void *reg,
1676 val = addr[0] << 24 | addr[1] << 16 | addr[2] << 8 | addr[3];
1677 iowrite32(val, reg);
1678 if (sh_eth_tsu_busy(ndev) < 0)
1681 val = addr[4] << 8 | addr[5];
1682 iowrite32(val, reg + 4);
1683 if (sh_eth_tsu_busy(ndev) < 0)
1689 static void sh_eth_tsu_read_entry(void *reg, u8 *addr)
1693 val = ioread32(reg);
1694 addr[0] = (val >> 24) & 0xff;
1695 addr[1] = (val >> 16) & 0xff;
1696 addr[2] = (val >> 8) & 0xff;
1697 addr[3] = val & 0xff;
1698 val = ioread32(reg + 4);
1699 addr[4] = (val >> 8) & 0xff;
1700 addr[5] = val & 0xff;
1704 static int sh_eth_tsu_find_entry(struct net_device *ndev, const u8 *addr)
1706 struct sh_eth_private *mdp = netdev_priv(ndev);
1707 void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
1709 u8 c_addr[ETH_ALEN];
1711 for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++, reg_offset += 8) {
1712 sh_eth_tsu_read_entry(reg_offset, c_addr);
1713 if (memcmp(addr, c_addr, ETH_ALEN) == 0)
1720 static int sh_eth_tsu_find_empty(struct net_device *ndev)
1725 memset(blank, 0, sizeof(blank));
1726 entry = sh_eth_tsu_find_entry(ndev, blank);
1727 return (entry < 0) ? -ENOMEM : entry;
1730 static int sh_eth_tsu_disable_cam_entry_table(struct net_device *ndev,
1733 struct sh_eth_private *mdp = netdev_priv(ndev);
1734 void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
1738 sh_eth_tsu_write(mdp, sh_eth_tsu_read(mdp, TSU_TEN) &
1739 ~(1 << (31 - entry)), TSU_TEN);
1741 memset(blank, 0, sizeof(blank));
1742 ret = sh_eth_tsu_write_entry(ndev, reg_offset + entry * 8, blank);
1748 static int sh_eth_tsu_add_entry(struct net_device *ndev, const u8 *addr)
1750 struct sh_eth_private *mdp = netdev_priv(ndev);
1751 void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
1757 i = sh_eth_tsu_find_entry(ndev, addr);
1759 /* No entry found, create one */
1760 i = sh_eth_tsu_find_empty(ndev);
1763 ret = sh_eth_tsu_write_entry(ndev, reg_offset + i * 8, addr);
1767 /* Enable the entry */
1768 sh_eth_tsu_write(mdp, sh_eth_tsu_read(mdp, TSU_TEN) |
1769 (1 << (31 - i)), TSU_TEN);
1772 /* Entry found or created, enable POST */
1773 sh_eth_tsu_enable_cam_entry_post(ndev, i);
1778 static int sh_eth_tsu_del_entry(struct net_device *ndev, const u8 *addr)
1780 struct sh_eth_private *mdp = netdev_priv(ndev);
1786 i = sh_eth_tsu_find_entry(ndev, addr);
1789 if (sh_eth_tsu_disable_cam_entry_post(ndev, i))
1792 /* Disable the entry if both ports was disabled */
1793 ret = sh_eth_tsu_disable_cam_entry_table(ndev, i);
1801 static int sh_eth_tsu_purge_all(struct net_device *ndev)
1803 struct sh_eth_private *mdp = netdev_priv(ndev);
1806 if (unlikely(!mdp->cd->tsu))
1809 for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++) {
1810 if (sh_eth_tsu_disable_cam_entry_post(ndev, i))
1813 /* Disable the entry if both ports was disabled */
1814 ret = sh_eth_tsu_disable_cam_entry_table(ndev, i);
1822 static void sh_eth_tsu_purge_mcast(struct net_device *ndev)
1824 struct sh_eth_private *mdp = netdev_priv(ndev);
1826 void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
1829 if (unlikely(!mdp->cd->tsu))
1832 for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++, reg_offset += 8) {
1833 sh_eth_tsu_read_entry(reg_offset, addr);
1834 if (is_multicast_ether_addr(addr))
1835 sh_eth_tsu_del_entry(ndev, addr);
1839 /* Multicast reception directions set */
1840 static void sh_eth_set_multicast_list(struct net_device *ndev)
1842 struct sh_eth_private *mdp = netdev_priv(ndev);
1845 unsigned long flags;
1847 spin_lock_irqsave(&mdp->lock, flags);
1849 * Initial condition is MCT = 1, PRM = 0.
1850 * Depending on ndev->flags, set PRM or clear MCT
1852 ecmr_bits = (sh_eth_read(ndev, ECMR) & ~ECMR_PRM) | ECMR_MCT;
1854 if (!(ndev->flags & IFF_MULTICAST)) {
1855 sh_eth_tsu_purge_mcast(ndev);
1858 if (ndev->flags & IFF_ALLMULTI) {
1859 sh_eth_tsu_purge_mcast(ndev);
1860 ecmr_bits &= ~ECMR_MCT;
1864 if (ndev->flags & IFF_PROMISC) {
1865 sh_eth_tsu_purge_all(ndev);
1866 ecmr_bits = (ecmr_bits & ~ECMR_MCT) | ECMR_PRM;
1867 } else if (mdp->cd->tsu) {
1868 struct netdev_hw_addr *ha;
1869 netdev_for_each_mc_addr(ha, ndev) {
1870 if (mcast_all && is_multicast_ether_addr(ha->addr))
1873 if (sh_eth_tsu_add_entry(ndev, ha->addr) < 0) {
1875 sh_eth_tsu_purge_mcast(ndev);
1876 ecmr_bits &= ~ECMR_MCT;
1882 /* Normal, unicast/broadcast-only mode. */
1883 ecmr_bits = (ecmr_bits & ~ECMR_PRM) | ECMR_MCT;
1886 /* update the ethernet mode */
1887 sh_eth_write(ndev, ecmr_bits, ECMR);
1889 spin_unlock_irqrestore(&mdp->lock, flags);
1891 #endif /* SH_ETH_HAS_TSU */
1893 /* SuperH's TSU register init function */
1894 static void sh_eth_tsu_init(struct sh_eth_private *mdp)
1896 sh_eth_tsu_write(mdp, 0, TSU_FWEN0); /* Disable forward(0->1) */
1897 sh_eth_tsu_write(mdp, 0, TSU_FWEN1); /* Disable forward(1->0) */
1898 sh_eth_tsu_write(mdp, 0, TSU_FCM); /* forward fifo 3k-3k */
1899 sh_eth_tsu_write(mdp, 0xc, TSU_BSYSL0);
1900 sh_eth_tsu_write(mdp, 0xc, TSU_BSYSL1);
1901 sh_eth_tsu_write(mdp, 0, TSU_PRISL0);
1902 sh_eth_tsu_write(mdp, 0, TSU_PRISL1);
1903 sh_eth_tsu_write(mdp, 0, TSU_FWSL0);
1904 sh_eth_tsu_write(mdp, 0, TSU_FWSL1);
1905 sh_eth_tsu_write(mdp, TSU_FWSLC_POSTENU | TSU_FWSLC_POSTENL, TSU_FWSLC);
1906 if (sh_eth_is_gether(mdp)) {
1907 sh_eth_tsu_write(mdp, 0, TSU_QTAG0); /* Disable QTAG(0->1) */
1908 sh_eth_tsu_write(mdp, 0, TSU_QTAG1); /* Disable QTAG(1->0) */
1910 sh_eth_tsu_write(mdp, 0, TSU_QTAGM0); /* Disable QTAG(0->1) */
1911 sh_eth_tsu_write(mdp, 0, TSU_QTAGM1); /* Disable QTAG(1->0) */
1913 sh_eth_tsu_write(mdp, 0, TSU_FWSR); /* all interrupt status clear */
1914 sh_eth_tsu_write(mdp, 0, TSU_FWINMK); /* Disable all interrupt */
1915 sh_eth_tsu_write(mdp, 0, TSU_TEN); /* Disable all CAM entry */
1916 sh_eth_tsu_write(mdp, 0, TSU_POST1); /* Disable CAM entry [ 0- 7] */
1917 sh_eth_tsu_write(mdp, 0, TSU_POST2); /* Disable CAM entry [ 8-15] */
1918 sh_eth_tsu_write(mdp, 0, TSU_POST3); /* Disable CAM entry [16-23] */
1919 sh_eth_tsu_write(mdp, 0, TSU_POST4); /* Disable CAM entry [24-31] */
1922 /* MDIO bus release function */
1923 static int sh_mdio_release(struct net_device *ndev)
1925 struct mii_bus *bus = dev_get_drvdata(&ndev->dev);
1927 /* unregister mdio bus */
1928 mdiobus_unregister(bus);
1930 /* remove mdio bus info from net_device */
1931 dev_set_drvdata(&ndev->dev, NULL);
1933 /* free interrupts memory */
1936 /* free bitbang info */
1937 free_mdio_bitbang(bus);
1942 /* MDIO bus init function */
1943 static int sh_mdio_init(struct net_device *ndev, int id,
1944 struct sh_eth_plat_data *pd)
1947 struct bb_info *bitbang;
1948 struct sh_eth_private *mdp = netdev_priv(ndev);
1950 /* create bit control struct for PHY */
1951 bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL);
1958 bitbang->addr = mdp->addr + mdp->reg_offset[PIR];
1959 bitbang->set_gate = pd->set_mdio_gate;
1960 bitbang->mdi_msk = 0x08;
1961 bitbang->mdo_msk = 0x04;
1962 bitbang->mmd_msk = 0x02;/* MMD */
1963 bitbang->mdc_msk = 0x01;
1964 bitbang->ctrl.ops = &bb_ops;
1966 /* MII controller setting */
1967 mdp->mii_bus = alloc_mdio_bitbang(&bitbang->ctrl);
1968 if (!mdp->mii_bus) {
1970 goto out_free_bitbang;
1973 /* Hook up MII support for ethtool */
1974 mdp->mii_bus->name = "sh_mii";
1975 mdp->mii_bus->parent = &ndev->dev;
1976 snprintf(mdp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
1977 mdp->pdev->name, id);
1980 mdp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
1981 if (!mdp->mii_bus->irq) {
1986 for (i = 0; i < PHY_MAX_ADDR; i++)
1987 mdp->mii_bus->irq[i] = PHY_POLL;
1989 /* regist mdio bus */
1990 ret = mdiobus_register(mdp->mii_bus);
1994 dev_set_drvdata(&ndev->dev, mdp->mii_bus);
1999 kfree(mdp->mii_bus->irq);
2002 free_mdio_bitbang(mdp->mii_bus);
2011 static const u16 *sh_eth_get_register_offset(int register_type)
2013 const u16 *reg_offset = NULL;
2015 switch (register_type) {
2016 case SH_ETH_REG_GIGABIT:
2017 reg_offset = sh_eth_offset_gigabit;
2019 case SH_ETH_REG_FAST_SH4:
2020 reg_offset = sh_eth_offset_fast_sh4;
2022 case SH_ETH_REG_FAST_SH3_SH2:
2023 reg_offset = sh_eth_offset_fast_sh3_sh2;
2026 printk(KERN_ERR "Unknown register type (%d)\n", register_type);
2033 static const struct net_device_ops sh_eth_netdev_ops = {
2034 .ndo_open = sh_eth_open,
2035 .ndo_stop = sh_eth_close,
2036 .ndo_start_xmit = sh_eth_start_xmit,
2037 .ndo_get_stats = sh_eth_get_stats,
2038 #if defined(SH_ETH_HAS_TSU)
2039 .ndo_set_rx_mode = sh_eth_set_multicast_list,
2041 .ndo_tx_timeout = sh_eth_tx_timeout,
2042 .ndo_do_ioctl = sh_eth_do_ioctl,
2043 .ndo_validate_addr = eth_validate_addr,
2044 .ndo_set_mac_address = eth_mac_addr,
2045 .ndo_change_mtu = eth_change_mtu,
2048 static int sh_eth_drv_probe(struct platform_device *pdev)
2051 struct resource *res;
2052 struct net_device *ndev = NULL;
2053 struct sh_eth_private *mdp = NULL;
2054 struct sh_eth_plat_data *pd;
2057 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2058 if (unlikely(res == NULL)) {
2059 dev_err(&pdev->dev, "invalid resource\n");
2064 ndev = alloc_etherdev(sizeof(struct sh_eth_private));
2070 /* The sh Ether-specific entries in the device structure. */
2071 ndev->base_addr = res->start;
2077 ret = platform_get_irq(pdev, 0);
2084 SET_NETDEV_DEV(ndev, &pdev->dev);
2086 /* Fill in the fields of the device structure with ethernet values. */
2089 mdp = netdev_priv(ndev);
2090 mdp->addr = ioremap(res->start, resource_size(res));
2091 if (mdp->addr == NULL) {
2093 dev_err(&pdev->dev, "ioremap failed.\n");
2097 spin_lock_init(&mdp->lock);
2099 pm_runtime_enable(&pdev->dev);
2100 pm_runtime_resume(&pdev->dev);
2102 pd = (struct sh_eth_plat_data *)(pdev->dev.platform_data);
2104 mdp->phy_id = pd->phy;
2105 mdp->phy_interface = pd->phy_interface;
2107 mdp->edmac_endian = pd->edmac_endian;
2108 mdp->no_ether_link = pd->no_ether_link;
2109 mdp->ether_link_active_low = pd->ether_link_active_low;
2110 mdp->reg_offset = sh_eth_get_register_offset(pd->register_type);
2113 #if defined(SH_ETH_HAS_BOTH_MODULES)
2114 mdp->cd = sh_eth_get_cpu_data(mdp);
2116 mdp->cd = &sh_eth_my_cpu_data;
2118 sh_eth_set_default_cpu_data(mdp->cd);
2121 ndev->netdev_ops = &sh_eth_netdev_ops;
2122 SET_ETHTOOL_OPS(ndev, &sh_eth_ethtool_ops);
2123 ndev->watchdog_timeo = TX_TIMEOUT;
2125 /* debug message level */
2126 mdp->msg_enable = SH_ETH_DEF_MSG_ENABLE;
2127 mdp->post_rx = POST_RX >> (devno << 1);
2128 mdp->post_fw = POST_FW >> (devno << 1);
2130 /* read and set MAC address */
2131 read_mac_address(ndev, pd->mac_addr);
2133 /* ioremap the TSU registers */
2135 struct resource *rtsu;
2136 rtsu = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2138 dev_err(&pdev->dev, "Not found TSU resource\n");
2141 mdp->tsu_addr = ioremap(rtsu->start,
2142 resource_size(rtsu));
2143 mdp->port = devno % 2;
2146 /* initialize first or needed device */
2147 if (!devno || pd->needs_init) {
2148 if (mdp->cd->chip_reset)
2149 mdp->cd->chip_reset(ndev);
2152 /* TSU init (Init only)*/
2153 sh_eth_tsu_init(mdp);
2157 /* network device register */
2158 ret = register_netdev(ndev);
2163 ret = sh_mdio_init(ndev, pdev->id, pd);
2165 goto out_unregister;
2167 /* print device information */
2168 pr_info("Base address at 0x%x, %pM, IRQ %d.\n",
2169 (u32)ndev->base_addr, ndev->dev_addr, ndev->irq);
2171 platform_set_drvdata(pdev, ndev);
2176 unregister_netdev(ndev);
2180 if (mdp && mdp->addr)
2182 if (mdp && mdp->tsu_addr)
2183 iounmap(mdp->tsu_addr);
2191 static int sh_eth_drv_remove(struct platform_device *pdev)
2193 struct net_device *ndev = platform_get_drvdata(pdev);
2194 struct sh_eth_private *mdp = netdev_priv(ndev);
2197 iounmap(mdp->tsu_addr);
2198 sh_mdio_release(ndev);
2199 unregister_netdev(ndev);
2200 pm_runtime_disable(&pdev->dev);
2203 platform_set_drvdata(pdev, NULL);
2208 static int sh_eth_runtime_nop(struct device *dev)
2211 * Runtime PM callback shared between ->runtime_suspend()
2212 * and ->runtime_resume(). Simply returns success.
2214 * This driver re-initializes all registers after
2215 * pm_runtime_get_sync() anyway so there is no need
2216 * to save and restore registers here.
2221 static struct dev_pm_ops sh_eth_dev_pm_ops = {
2222 .runtime_suspend = sh_eth_runtime_nop,
2223 .runtime_resume = sh_eth_runtime_nop,
2226 static struct platform_driver sh_eth_driver = {
2227 .probe = sh_eth_drv_probe,
2228 .remove = sh_eth_drv_remove,
2231 .pm = &sh_eth_dev_pm_ops,
2235 module_platform_driver(sh_eth_driver);
2237 MODULE_AUTHOR("Nobuhiro Iwamatsu, Yoshihiro Shimoda");
2238 MODULE_DESCRIPTION("Renesas SuperH Ethernet driver");
2239 MODULE_LICENSE("GPL v2");