1 // SPDX-License-Identifier: GPL-2.0
2 /* Renesas Ethernet AVB device driver
4 * Copyright (C) 2014-2015 Renesas Electronics Corporation
5 * Copyright (C) 2015 Renesas Solutions Corp.
6 * Copyright (C) 2015-2016 Cogent Embedded, Inc. <source@cogentembedded.com>
8 * Based on the SuperH Ethernet driver
11 #include <linux/cache.h>
12 #include <linux/clk.h>
13 #include <linux/delay.h>
14 #include <linux/dma-mapping.h>
15 #include <linux/err.h>
16 #include <linux/etherdevice.h>
17 #include <linux/ethtool.h>
18 #include <linux/if_vlan.h>
19 #include <linux/kernel.h>
20 #include <linux/list.h>
21 #include <linux/module.h>
22 #include <linux/net_tstamp.h>
24 #include <linux/of_device.h>
25 #include <linux/of_irq.h>
26 #include <linux/of_mdio.h>
27 #include <linux/of_net.h>
28 #include <linux/pm_runtime.h>
29 #include <linux/slab.h>
30 #include <linux/spinlock.h>
31 #include <linux/sys_soc.h>
33 #include <asm/div64.h>
37 #define RAVB_DEF_MSG_ENABLE \
43 static const char *ravb_rx_irqs[NUM_RX_QUEUE] = {
48 static const char *ravb_tx_irqs[NUM_TX_QUEUE] = {
53 void ravb_modify(struct net_device *ndev, enum ravb_reg reg, u32 clear,
56 ravb_write(ndev, (ravb_read(ndev, reg) & ~clear) | set, reg);
59 int ravb_wait(struct net_device *ndev, enum ravb_reg reg, u32 mask, u32 value)
63 for (i = 0; i < 10000; i++) {
64 if ((ravb_read(ndev, reg) & mask) == value)
71 static int ravb_config(struct net_device *ndev)
76 ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_CONFIG);
77 /* Check if the operating mode is changed to the config mode */
78 error = ravb_wait(ndev, CSR, CSR_OPS, CSR_OPS_CONFIG);
80 netdev_err(ndev, "failed to switch device to config mode\n");
85 static void ravb_set_rate(struct net_device *ndev)
87 struct ravb_private *priv = netdev_priv(ndev);
89 switch (priv->speed) {
90 case 100: /* 100BASE */
91 ravb_write(ndev, GECMR_SPEED_100, GECMR);
93 case 1000: /* 1000BASE */
94 ravb_write(ndev, GECMR_SPEED_1000, GECMR);
99 static void ravb_set_buffer_align(struct sk_buff *skb)
101 u32 reserve = (unsigned long)skb->data & (RAVB_ALIGN - 1);
104 skb_reserve(skb, RAVB_ALIGN - reserve);
107 /* Get MAC address from the MAC address registers
109 * Ethernet AVB device doesn't have ROM for MAC address.
110 * This function gets the MAC address that was used by a bootloader.
112 static void ravb_read_mac_address(struct net_device *ndev, const u8 *mac)
115 ether_addr_copy(ndev->dev_addr, mac);
117 u32 mahr = ravb_read(ndev, MAHR);
118 u32 malr = ravb_read(ndev, MALR);
120 ndev->dev_addr[0] = (mahr >> 24) & 0xFF;
121 ndev->dev_addr[1] = (mahr >> 16) & 0xFF;
122 ndev->dev_addr[2] = (mahr >> 8) & 0xFF;
123 ndev->dev_addr[3] = (mahr >> 0) & 0xFF;
124 ndev->dev_addr[4] = (malr >> 8) & 0xFF;
125 ndev->dev_addr[5] = (malr >> 0) & 0xFF;
129 static void ravb_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set)
131 struct ravb_private *priv = container_of(ctrl, struct ravb_private,
134 ravb_modify(priv->ndev, PIR, mask, set ? mask : 0);
137 /* MDC pin control */
138 static void ravb_set_mdc(struct mdiobb_ctrl *ctrl, int level)
140 ravb_mdio_ctrl(ctrl, PIR_MDC, level);
143 /* Data I/O pin control */
144 static void ravb_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output)
146 ravb_mdio_ctrl(ctrl, PIR_MMD, output);
150 static void ravb_set_mdio_data(struct mdiobb_ctrl *ctrl, int value)
152 ravb_mdio_ctrl(ctrl, PIR_MDO, value);
156 static int ravb_get_mdio_data(struct mdiobb_ctrl *ctrl)
158 struct ravb_private *priv = container_of(ctrl, struct ravb_private,
161 return (ravb_read(priv->ndev, PIR) & PIR_MDI) != 0;
164 /* MDIO bus control struct */
165 static struct mdiobb_ops bb_ops = {
166 .owner = THIS_MODULE,
167 .set_mdc = ravb_set_mdc,
168 .set_mdio_dir = ravb_set_mdio_dir,
169 .set_mdio_data = ravb_set_mdio_data,
170 .get_mdio_data = ravb_get_mdio_data,
173 /* Free TX skb function for AVB-IP */
174 static int ravb_tx_free(struct net_device *ndev, int q, bool free_txed_only)
176 struct ravb_private *priv = netdev_priv(ndev);
177 struct net_device_stats *stats = &priv->stats[q];
178 int num_tx_desc = priv->num_tx_desc;
179 struct ravb_tx_desc *desc;
184 for (; priv->cur_tx[q] - priv->dirty_tx[q] > 0; priv->dirty_tx[q]++) {
187 entry = priv->dirty_tx[q] % (priv->num_tx_ring[q] *
189 desc = &priv->tx_ring[q][entry];
190 txed = desc->die_dt == DT_FEMPTY;
191 if (free_txed_only && !txed)
193 /* Descriptor type must be checked before all other reads */
195 size = le16_to_cpu(desc->ds_tagl) & TX_DS;
196 /* Free the original skb. */
197 if (priv->tx_skb[q][entry / num_tx_desc]) {
198 dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
199 size, DMA_TO_DEVICE);
200 /* Last packet descriptor? */
201 if (entry % num_tx_desc == num_tx_desc - 1) {
202 entry /= num_tx_desc;
203 dev_kfree_skb_any(priv->tx_skb[q][entry]);
204 priv->tx_skb[q][entry] = NULL;
211 stats->tx_bytes += size;
212 desc->die_dt = DT_EEMPTY;
217 /* Free skb's and DMA buffers for Ethernet AVB */
218 static void ravb_ring_free(struct net_device *ndev, int q)
220 struct ravb_private *priv = netdev_priv(ndev);
221 int num_tx_desc = priv->num_tx_desc;
225 if (priv->rx_ring[q]) {
226 for (i = 0; i < priv->num_rx_ring[q]; i++) {
227 struct ravb_ex_rx_desc *desc = &priv->rx_ring[q][i];
229 if (!dma_mapping_error(ndev->dev.parent,
230 le32_to_cpu(desc->dptr)))
231 dma_unmap_single(ndev->dev.parent,
232 le32_to_cpu(desc->dptr),
236 ring_size = sizeof(struct ravb_ex_rx_desc) *
237 (priv->num_rx_ring[q] + 1);
238 dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q],
239 priv->rx_desc_dma[q]);
240 priv->rx_ring[q] = NULL;
243 if (priv->tx_ring[q]) {
244 ravb_tx_free(ndev, q, false);
246 ring_size = sizeof(struct ravb_tx_desc) *
247 (priv->num_tx_ring[q] * num_tx_desc + 1);
248 dma_free_coherent(ndev->dev.parent, ring_size, priv->tx_ring[q],
249 priv->tx_desc_dma[q]);
250 priv->tx_ring[q] = NULL;
253 /* Free RX skb ringbuffer */
254 if (priv->rx_skb[q]) {
255 for (i = 0; i < priv->num_rx_ring[q]; i++)
256 dev_kfree_skb(priv->rx_skb[q][i]);
258 kfree(priv->rx_skb[q]);
259 priv->rx_skb[q] = NULL;
261 /* Free aligned TX buffers */
262 kfree(priv->tx_align[q]);
263 priv->tx_align[q] = NULL;
265 /* Free TX skb ringbuffer.
266 * SKBs are freed by ravb_tx_free() call above.
268 kfree(priv->tx_skb[q]);
269 priv->tx_skb[q] = NULL;
272 /* Format skb and descriptor buffer for Ethernet AVB */
273 static void ravb_ring_format(struct net_device *ndev, int q)
275 struct ravb_private *priv = netdev_priv(ndev);
276 int num_tx_desc = priv->num_tx_desc;
277 struct ravb_ex_rx_desc *rx_desc;
278 struct ravb_tx_desc *tx_desc;
279 struct ravb_desc *desc;
280 int rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q];
281 int tx_ring_size = sizeof(*tx_desc) * priv->num_tx_ring[q] *
288 priv->dirty_rx[q] = 0;
289 priv->dirty_tx[q] = 0;
291 memset(priv->rx_ring[q], 0, rx_ring_size);
292 /* Build RX ring buffer */
293 for (i = 0; i < priv->num_rx_ring[q]; i++) {
295 rx_desc = &priv->rx_ring[q][i];
296 rx_desc->ds_cc = cpu_to_le16(priv->rx_buf_sz);
297 dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
300 /* We just set the data size to 0 for a failed mapping which
301 * should prevent DMA from happening...
303 if (dma_mapping_error(ndev->dev.parent, dma_addr))
304 rx_desc->ds_cc = cpu_to_le16(0);
305 rx_desc->dptr = cpu_to_le32(dma_addr);
306 rx_desc->die_dt = DT_FEMPTY;
308 rx_desc = &priv->rx_ring[q][i];
309 rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]);
310 rx_desc->die_dt = DT_LINKFIX; /* type */
312 memset(priv->tx_ring[q], 0, tx_ring_size);
313 /* Build TX ring buffer */
314 for (i = 0, tx_desc = priv->tx_ring[q]; i < priv->num_tx_ring[q];
316 tx_desc->die_dt = DT_EEMPTY;
317 if (num_tx_desc > 1) {
319 tx_desc->die_dt = DT_EEMPTY;
322 tx_desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]);
323 tx_desc->die_dt = DT_LINKFIX; /* type */
325 /* RX descriptor base address for best effort */
326 desc = &priv->desc_bat[RX_QUEUE_OFFSET + q];
327 desc->die_dt = DT_LINKFIX; /* type */
328 desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]);
330 /* TX descriptor base address for best effort */
331 desc = &priv->desc_bat[q];
332 desc->die_dt = DT_LINKFIX; /* type */
333 desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]);
336 /* Init skb and descriptor buffer for Ethernet AVB */
337 static int ravb_ring_init(struct net_device *ndev, int q)
339 struct ravb_private *priv = netdev_priv(ndev);
340 int num_tx_desc = priv->num_tx_desc;
345 priv->rx_buf_sz = (ndev->mtu <= 1492 ? PKT_BUF_SZ : ndev->mtu) +
346 ETH_HLEN + VLAN_HLEN + sizeof(__sum16);
348 /* Allocate RX and TX skb rings */
349 priv->rx_skb[q] = kcalloc(priv->num_rx_ring[q],
350 sizeof(*priv->rx_skb[q]), GFP_KERNEL);
351 priv->tx_skb[q] = kcalloc(priv->num_tx_ring[q],
352 sizeof(*priv->tx_skb[q]), GFP_KERNEL);
353 if (!priv->rx_skb[q] || !priv->tx_skb[q])
356 for (i = 0; i < priv->num_rx_ring[q]; i++) {
357 skb = netdev_alloc_skb(ndev, priv->rx_buf_sz + RAVB_ALIGN - 1);
360 ravb_set_buffer_align(skb);
361 priv->rx_skb[q][i] = skb;
364 if (num_tx_desc > 1) {
365 /* Allocate rings for the aligned buffers */
366 priv->tx_align[q] = kmalloc(DPTR_ALIGN * priv->num_tx_ring[q] +
367 DPTR_ALIGN - 1, GFP_KERNEL);
368 if (!priv->tx_align[q])
372 /* Allocate all RX descriptors. */
373 ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1);
374 priv->rx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
375 &priv->rx_desc_dma[q],
377 if (!priv->rx_ring[q])
380 priv->dirty_rx[q] = 0;
382 /* Allocate all TX descriptors. */
383 ring_size = sizeof(struct ravb_tx_desc) *
384 (priv->num_tx_ring[q] * num_tx_desc + 1);
385 priv->tx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
386 &priv->tx_desc_dma[q],
388 if (!priv->tx_ring[q])
394 ravb_ring_free(ndev, q);
399 /* E-MAC init function */
400 static void ravb_emac_init(struct net_device *ndev)
402 /* Receive frame limit set register */
403 ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR);
405 /* EMAC Mode: PAUSE prohibition; Duplex; RX Checksum; TX; RX */
406 ravb_write(ndev, ECMR_ZPF | ECMR_DM |
407 (ndev->features & NETIF_F_RXCSUM ? ECMR_RCSC : 0) |
408 ECMR_TE | ECMR_RE, ECMR);
412 /* Set MAC address */
414 (ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) |
415 (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR);
417 (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]), MALR);
419 /* E-MAC status register clear */
420 ravb_write(ndev, ECSR_ICD | ECSR_MPD, ECSR);
422 /* E-MAC interrupt enable register */
423 ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP, ECSIPR);
426 /* Device init function for Ethernet AVB */
427 static int ravb_dmac_init(struct net_device *ndev)
429 struct ravb_private *priv = netdev_priv(ndev);
432 /* Set CONFIG mode */
433 error = ravb_config(ndev);
437 error = ravb_ring_init(ndev, RAVB_BE);
440 error = ravb_ring_init(ndev, RAVB_NC);
442 ravb_ring_free(ndev, RAVB_BE);
446 /* Descriptor format */
447 ravb_ring_format(ndev, RAVB_BE);
448 ravb_ring_format(ndev, RAVB_NC);
450 #if defined(__LITTLE_ENDIAN)
451 ravb_modify(ndev, CCC, CCC_BOC, 0);
453 ravb_modify(ndev, CCC, CCC_BOC, CCC_BOC);
458 RCR_EFFS | RCR_ENCF | RCR_ETS0 | RCR_ESF | 0x18000000, RCR);
461 ravb_write(ndev, TGC_TQP_AVBMODE1 | 0x00112200, TGC);
463 /* Timestamp enable */
464 ravb_write(ndev, TCCR_TFEN, TCCR);
466 /* Interrupt init: */
467 if (priv->chip_id == RCAR_GEN3) {
469 ravb_write(ndev, 0, DIL);
470 /* Set queue specific interrupt */
471 ravb_write(ndev, CIE_CRIE | CIE_CTIE | CIE_CL0M, CIE);
474 ravb_write(ndev, RIC0_FRE0 | RIC0_FRE1, RIC0);
475 /* Disable FIFO full warning */
476 ravb_write(ndev, 0, RIC1);
477 /* Receive FIFO full error, descriptor empty */
478 ravb_write(ndev, RIC2_QFE0 | RIC2_QFE1 | RIC2_RFFE, RIC2);
479 /* Frame transmitted, timestamp FIFO updated */
480 ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC);
482 /* Setting the control will start the AVB-DMAC process. */
483 ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_OPERATION);
488 static void ravb_get_tx_tstamp(struct net_device *ndev)
490 struct ravb_private *priv = netdev_priv(ndev);
491 struct ravb_tstamp_skb *ts_skb, *ts_skb2;
492 struct skb_shared_hwtstamps shhwtstamps;
494 struct timespec64 ts;
499 count = (ravb_read(ndev, TSR) & TSR_TFFL) >> 8;
501 tfa2 = ravb_read(ndev, TFA2);
502 tfa_tag = (tfa2 & TFA2_TST) >> 16;
503 ts.tv_nsec = (u64)ravb_read(ndev, TFA0);
504 ts.tv_sec = ((u64)(tfa2 & TFA2_TSV) << 32) |
505 ravb_read(ndev, TFA1);
506 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
507 shhwtstamps.hwtstamp = timespec64_to_ktime(ts);
508 list_for_each_entry_safe(ts_skb, ts_skb2, &priv->ts_skb_list,
512 list_del(&ts_skb->list);
514 if (tag == tfa_tag) {
515 skb_tstamp_tx(skb, &shhwtstamps);
519 ravb_modify(ndev, TCCR, TCCR_TFR, TCCR_TFR);
523 static void ravb_rx_csum(struct sk_buff *skb)
527 /* The hardware checksum is contained in sizeof(__sum16) (2) bytes
528 * appended to packet data
530 if (unlikely(skb->len < sizeof(__sum16)))
532 hw_csum = skb_tail_pointer(skb) - sizeof(__sum16);
533 skb->csum = csum_unfold((__force __sum16)get_unaligned_le16(hw_csum));
534 skb->ip_summed = CHECKSUM_COMPLETE;
535 skb_trim(skb, skb->len - sizeof(__sum16));
538 /* Packet receive function for Ethernet AVB */
539 static bool ravb_rx(struct net_device *ndev, int *quota, int q)
541 struct ravb_private *priv = netdev_priv(ndev);
542 int entry = priv->cur_rx[q] % priv->num_rx_ring[q];
543 int boguscnt = (priv->dirty_rx[q] + priv->num_rx_ring[q]) -
545 struct net_device_stats *stats = &priv->stats[q];
546 struct ravb_ex_rx_desc *desc;
549 struct timespec64 ts;
554 boguscnt = min(boguscnt, *quota);
556 desc = &priv->rx_ring[q][entry];
557 while (desc->die_dt != DT_FEMPTY) {
558 /* Descriptor type must be checked before all other reads */
560 desc_status = desc->msc;
561 pkt_len = le16_to_cpu(desc->ds_cc) & RX_DS;
566 /* We use 0-byte descriptors to mark the DMA mapping errors */
570 if (desc_status & MSC_MC)
573 if (desc_status & (MSC_CRC | MSC_RFE | MSC_RTSF | MSC_RTLF |
576 if (desc_status & MSC_CRC)
577 stats->rx_crc_errors++;
578 if (desc_status & MSC_RFE)
579 stats->rx_frame_errors++;
580 if (desc_status & (MSC_RTLF | MSC_RTSF))
581 stats->rx_length_errors++;
582 if (desc_status & MSC_CEEF)
583 stats->rx_missed_errors++;
585 u32 get_ts = priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE;
587 skb = priv->rx_skb[q][entry];
588 priv->rx_skb[q][entry] = NULL;
589 dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
592 get_ts &= (q == RAVB_NC) ?
593 RAVB_RXTSTAMP_TYPE_V2_L2_EVENT :
594 ~RAVB_RXTSTAMP_TYPE_V2_L2_EVENT;
596 struct skb_shared_hwtstamps *shhwtstamps;
598 shhwtstamps = skb_hwtstamps(skb);
599 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
600 ts.tv_sec = ((u64) le16_to_cpu(desc->ts_sh) <<
601 32) | le32_to_cpu(desc->ts_sl);
602 ts.tv_nsec = le32_to_cpu(desc->ts_n);
603 shhwtstamps->hwtstamp = timespec64_to_ktime(ts);
606 skb_put(skb, pkt_len);
607 skb->protocol = eth_type_trans(skb, ndev);
608 if (ndev->features & NETIF_F_RXCSUM)
610 napi_gro_receive(&priv->napi[q], skb);
612 stats->rx_bytes += pkt_len;
615 entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q];
616 desc = &priv->rx_ring[q][entry];
619 /* Refill the RX ring buffers. */
620 for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) {
621 entry = priv->dirty_rx[q] % priv->num_rx_ring[q];
622 desc = &priv->rx_ring[q][entry];
623 desc->ds_cc = cpu_to_le16(priv->rx_buf_sz);
625 if (!priv->rx_skb[q][entry]) {
626 skb = netdev_alloc_skb(ndev,
630 break; /* Better luck next round. */
631 ravb_set_buffer_align(skb);
632 dma_addr = dma_map_single(ndev->dev.parent, skb->data,
633 le16_to_cpu(desc->ds_cc),
635 skb_checksum_none_assert(skb);
636 /* We just set the data size to 0 for a failed mapping
637 * which should prevent DMA from happening...
639 if (dma_mapping_error(ndev->dev.parent, dma_addr))
640 desc->ds_cc = cpu_to_le16(0);
641 desc->dptr = cpu_to_le32(dma_addr);
642 priv->rx_skb[q][entry] = skb;
644 /* Descriptor type must be set after all the above writes */
646 desc->die_dt = DT_FEMPTY;
649 *quota -= limit - (++boguscnt);
651 return boguscnt <= 0;
654 static void ravb_rcv_snd_disable(struct net_device *ndev)
656 /* Disable TX and RX */
657 ravb_modify(ndev, ECMR, ECMR_RE | ECMR_TE, 0);
660 static void ravb_rcv_snd_enable(struct net_device *ndev)
662 /* Enable TX and RX */
663 ravb_modify(ndev, ECMR, ECMR_RE | ECMR_TE, ECMR_RE | ECMR_TE);
666 /* function for waiting dma process finished */
667 static int ravb_stop_dma(struct net_device *ndev)
671 /* Wait for stopping the hardware TX process */
672 error = ravb_wait(ndev, TCCR,
673 TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3, 0);
677 error = ravb_wait(ndev, CSR, CSR_TPO0 | CSR_TPO1 | CSR_TPO2 | CSR_TPO3,
682 /* Stop the E-MAC's RX/TX processes. */
683 ravb_rcv_snd_disable(ndev);
685 /* Wait for stopping the RX DMA process */
686 error = ravb_wait(ndev, CSR, CSR_RPO, 0);
690 /* Stop AVB-DMAC process */
691 return ravb_config(ndev);
694 /* E-MAC interrupt handler */
695 static void ravb_emac_interrupt_unlocked(struct net_device *ndev)
697 struct ravb_private *priv = netdev_priv(ndev);
700 ecsr = ravb_read(ndev, ECSR);
701 ravb_write(ndev, ecsr, ECSR); /* clear interrupt */
704 pm_wakeup_event(&priv->pdev->dev, 0);
706 ndev->stats.tx_carrier_errors++;
707 if (ecsr & ECSR_LCHNG) {
709 if (priv->no_avb_link)
711 psr = ravb_read(ndev, PSR);
712 if (priv->avb_link_active_low)
714 if (!(psr & PSR_LMON)) {
715 /* DIsable RX and TX */
716 ravb_rcv_snd_disable(ndev);
718 /* Enable RX and TX */
719 ravb_rcv_snd_enable(ndev);
724 static irqreturn_t ravb_emac_interrupt(int irq, void *dev_id)
726 struct net_device *ndev = dev_id;
727 struct ravb_private *priv = netdev_priv(ndev);
729 spin_lock(&priv->lock);
730 ravb_emac_interrupt_unlocked(ndev);
732 spin_unlock(&priv->lock);
736 /* Error interrupt handler */
737 static void ravb_error_interrupt(struct net_device *ndev)
739 struct ravb_private *priv = netdev_priv(ndev);
742 eis = ravb_read(ndev, EIS);
743 ravb_write(ndev, ~(EIS_QFS | EIS_RESERVED), EIS);
745 ris2 = ravb_read(ndev, RIS2);
746 ravb_write(ndev, ~(RIS2_QFF0 | RIS2_RFFF | RIS2_RESERVED),
749 /* Receive Descriptor Empty int */
750 if (ris2 & RIS2_QFF0)
751 priv->stats[RAVB_BE].rx_over_errors++;
753 /* Receive Descriptor Empty int */
754 if (ris2 & RIS2_QFF1)
755 priv->stats[RAVB_NC].rx_over_errors++;
757 /* Receive FIFO Overflow int */
758 if (ris2 & RIS2_RFFF)
759 priv->rx_fifo_errors++;
763 static bool ravb_queue_interrupt(struct net_device *ndev, int q)
765 struct ravb_private *priv = netdev_priv(ndev);
766 u32 ris0 = ravb_read(ndev, RIS0);
767 u32 ric0 = ravb_read(ndev, RIC0);
768 u32 tis = ravb_read(ndev, TIS);
769 u32 tic = ravb_read(ndev, TIC);
771 if (((ris0 & ric0) & BIT(q)) || ((tis & tic) & BIT(q))) {
772 if (napi_schedule_prep(&priv->napi[q])) {
773 /* Mask RX and TX interrupts */
774 if (priv->chip_id == RCAR_GEN2) {
775 ravb_write(ndev, ric0 & ~BIT(q), RIC0);
776 ravb_write(ndev, tic & ~BIT(q), TIC);
778 ravb_write(ndev, BIT(q), RID0);
779 ravb_write(ndev, BIT(q), TID);
781 __napi_schedule(&priv->napi[q]);
784 "ignoring interrupt, rx status 0x%08x, rx mask 0x%08x,\n",
787 " tx status 0x%08x, tx mask 0x%08x.\n",
795 static bool ravb_timestamp_interrupt(struct net_device *ndev)
797 u32 tis = ravb_read(ndev, TIS);
799 if (tis & TIS_TFUF) {
800 ravb_write(ndev, ~(TIS_TFUF | TIS_RESERVED), TIS);
801 ravb_get_tx_tstamp(ndev);
807 static irqreturn_t ravb_interrupt(int irq, void *dev_id)
809 struct net_device *ndev = dev_id;
810 struct ravb_private *priv = netdev_priv(ndev);
811 irqreturn_t result = IRQ_NONE;
814 spin_lock(&priv->lock);
815 /* Get interrupt status */
816 iss = ravb_read(ndev, ISS);
818 /* Received and transmitted interrupts */
819 if (iss & (ISS_FRS | ISS_FTS | ISS_TFUS)) {
822 /* Timestamp updated */
823 if (ravb_timestamp_interrupt(ndev))
824 result = IRQ_HANDLED;
826 /* Network control and best effort queue RX/TX */
827 for (q = RAVB_NC; q >= RAVB_BE; q--) {
828 if (ravb_queue_interrupt(ndev, q))
829 result = IRQ_HANDLED;
833 /* E-MAC status summary */
835 ravb_emac_interrupt_unlocked(ndev);
836 result = IRQ_HANDLED;
839 /* Error status summary */
841 ravb_error_interrupt(ndev);
842 result = IRQ_HANDLED;
845 /* gPTP interrupt status summary */
846 if (iss & ISS_CGIS) {
847 ravb_ptp_interrupt(ndev);
848 result = IRQ_HANDLED;
852 spin_unlock(&priv->lock);
856 /* Timestamp/Error/gPTP interrupt handler */
857 static irqreturn_t ravb_multi_interrupt(int irq, void *dev_id)
859 struct net_device *ndev = dev_id;
860 struct ravb_private *priv = netdev_priv(ndev);
861 irqreturn_t result = IRQ_NONE;
864 spin_lock(&priv->lock);
865 /* Get interrupt status */
866 iss = ravb_read(ndev, ISS);
868 /* Timestamp updated */
869 if ((iss & ISS_TFUS) && ravb_timestamp_interrupt(ndev))
870 result = IRQ_HANDLED;
872 /* Error status summary */
874 ravb_error_interrupt(ndev);
875 result = IRQ_HANDLED;
878 /* gPTP interrupt status summary */
879 if (iss & ISS_CGIS) {
880 ravb_ptp_interrupt(ndev);
881 result = IRQ_HANDLED;
885 spin_unlock(&priv->lock);
889 static irqreturn_t ravb_dma_interrupt(int irq, void *dev_id, int q)
891 struct net_device *ndev = dev_id;
892 struct ravb_private *priv = netdev_priv(ndev);
893 irqreturn_t result = IRQ_NONE;
895 spin_lock(&priv->lock);
897 /* Network control/Best effort queue RX/TX */
898 if (ravb_queue_interrupt(ndev, q))
899 result = IRQ_HANDLED;
902 spin_unlock(&priv->lock);
906 static irqreturn_t ravb_be_interrupt(int irq, void *dev_id)
908 return ravb_dma_interrupt(irq, dev_id, RAVB_BE);
911 static irqreturn_t ravb_nc_interrupt(int irq, void *dev_id)
913 return ravb_dma_interrupt(irq, dev_id, RAVB_NC);
916 static int ravb_poll(struct napi_struct *napi, int budget)
918 struct net_device *ndev = napi->dev;
919 struct ravb_private *priv = netdev_priv(ndev);
921 int q = napi - priv->napi;
927 tis = ravb_read(ndev, TIS);
928 ris0 = ravb_read(ndev, RIS0);
929 if (!((ris0 & mask) || (tis & mask)))
932 /* Processing RX Descriptor Ring */
934 /* Clear RX interrupt */
935 ravb_write(ndev, ~(mask | RIS0_RESERVED), RIS0);
936 if (ravb_rx(ndev, "a, q))
939 /* Processing TX Descriptor Ring */
941 spin_lock_irqsave(&priv->lock, flags);
942 /* Clear TX interrupt */
943 ravb_write(ndev, ~(mask | TIS_RESERVED), TIS);
944 ravb_tx_free(ndev, q, true);
945 netif_wake_subqueue(ndev, q);
947 spin_unlock_irqrestore(&priv->lock, flags);
953 /* Re-enable RX/TX interrupts */
954 spin_lock_irqsave(&priv->lock, flags);
955 if (priv->chip_id == RCAR_GEN2) {
956 ravb_modify(ndev, RIC0, mask, mask);
957 ravb_modify(ndev, TIC, mask, mask);
959 ravb_write(ndev, mask, RIE0);
960 ravb_write(ndev, mask, TIE);
963 spin_unlock_irqrestore(&priv->lock, flags);
965 /* Receive error message handling */
966 priv->rx_over_errors = priv->stats[RAVB_BE].rx_over_errors;
967 priv->rx_over_errors += priv->stats[RAVB_NC].rx_over_errors;
968 if (priv->rx_over_errors != ndev->stats.rx_over_errors)
969 ndev->stats.rx_over_errors = priv->rx_over_errors;
970 if (priv->rx_fifo_errors != ndev->stats.rx_fifo_errors)
971 ndev->stats.rx_fifo_errors = priv->rx_fifo_errors;
973 return budget - quota;
976 /* PHY state control function */
977 static void ravb_adjust_link(struct net_device *ndev)
979 struct ravb_private *priv = netdev_priv(ndev);
980 struct phy_device *phydev = ndev->phydev;
981 bool new_state = false;
984 spin_lock_irqsave(&priv->lock, flags);
986 /* Disable TX and RX right over here, if E-MAC change is ignored */
987 if (priv->no_avb_link)
988 ravb_rcv_snd_disable(ndev);
991 if (phydev->speed != priv->speed) {
993 priv->speed = phydev->speed;
997 ravb_modify(ndev, ECMR, ECMR_TXF, 0);
999 priv->link = phydev->link;
1001 } else if (priv->link) {
1007 /* Enable TX and RX right over here, if E-MAC change is ignored */
1008 if (priv->no_avb_link && phydev->link)
1009 ravb_rcv_snd_enable(ndev);
1012 spin_unlock_irqrestore(&priv->lock, flags);
1014 if (new_state && netif_msg_link(priv))
1015 phy_print_status(phydev);
1018 static const struct soc_device_attribute r8a7795es10[] = {
1019 { .soc_id = "r8a7795", .revision = "ES1.0", },
1023 /* PHY init function */
1024 static int ravb_phy_init(struct net_device *ndev)
1026 struct device_node *np = ndev->dev.parent->of_node;
1027 struct ravb_private *priv = netdev_priv(ndev);
1028 struct phy_device *phydev;
1029 struct device_node *pn;
1035 /* Try connecting to PHY */
1036 pn = of_parse_phandle(np, "phy-handle", 0);
1038 /* In the case of a fixed PHY, the DT node associated
1039 * to the PHY is the Ethernet MAC DT node.
1041 if (of_phy_is_fixed_link(np)) {
1042 err = of_phy_register_fixed_link(np);
1046 pn = of_node_get(np);
1048 phydev = of_phy_connect(ndev, pn, ravb_adjust_link, 0,
1049 priv->phy_interface);
1052 netdev_err(ndev, "failed to connect PHY\n");
1054 goto err_deregister_fixed_link;
1057 /* This driver only support 10/100Mbit speeds on R-Car H3 ES1.0
1060 if (soc_device_match(r8a7795es10)) {
1061 err = phy_set_max_speed(phydev, SPEED_100);
1063 netdev_err(ndev, "failed to limit PHY to 100Mbit/s\n");
1064 goto err_phy_disconnect;
1067 netdev_info(ndev, "limited PHY to 100Mbit/s\n");
1070 /* 10BASE, Pause and Asym Pause is not supported */
1071 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
1072 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT);
1073 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Pause_BIT);
1074 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT);
1076 /* Half Duplex is not supported */
1077 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1078 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
1080 phy_attached_info(phydev);
1085 phy_disconnect(phydev);
1086 err_deregister_fixed_link:
1087 if (of_phy_is_fixed_link(np))
1088 of_phy_deregister_fixed_link(np);
1093 /* PHY control start function */
1094 static int ravb_phy_start(struct net_device *ndev)
1098 error = ravb_phy_init(ndev);
1102 phy_start(ndev->phydev);
1107 static u32 ravb_get_msglevel(struct net_device *ndev)
1109 struct ravb_private *priv = netdev_priv(ndev);
1111 return priv->msg_enable;
1114 static void ravb_set_msglevel(struct net_device *ndev, u32 value)
1116 struct ravb_private *priv = netdev_priv(ndev);
1118 priv->msg_enable = value;
1121 static const char ravb_gstrings_stats[][ETH_GSTRING_LEN] = {
1122 "rx_queue_0_current",
1123 "tx_queue_0_current",
1126 "rx_queue_0_packets",
1127 "tx_queue_0_packets",
1130 "rx_queue_0_mcast_packets",
1131 "rx_queue_0_errors",
1132 "rx_queue_0_crc_errors",
1133 "rx_queue_0_frame_errors",
1134 "rx_queue_0_length_errors",
1135 "rx_queue_0_missed_errors",
1136 "rx_queue_0_over_errors",
1138 "rx_queue_1_current",
1139 "tx_queue_1_current",
1142 "rx_queue_1_packets",
1143 "tx_queue_1_packets",
1146 "rx_queue_1_mcast_packets",
1147 "rx_queue_1_errors",
1148 "rx_queue_1_crc_errors",
1149 "rx_queue_1_frame_errors",
1150 "rx_queue_1_length_errors",
1151 "rx_queue_1_missed_errors",
1152 "rx_queue_1_over_errors",
1155 #define RAVB_STATS_LEN ARRAY_SIZE(ravb_gstrings_stats)
1157 static int ravb_get_sset_count(struct net_device *netdev, int sset)
1161 return RAVB_STATS_LEN;
1167 static void ravb_get_ethtool_stats(struct net_device *ndev,
1168 struct ethtool_stats *estats, u64 *data)
1170 struct ravb_private *priv = netdev_priv(ndev);
1174 /* Device-specific stats */
1175 for (q = RAVB_BE; q < NUM_RX_QUEUE; q++) {
1176 struct net_device_stats *stats = &priv->stats[q];
1178 data[i++] = priv->cur_rx[q];
1179 data[i++] = priv->cur_tx[q];
1180 data[i++] = priv->dirty_rx[q];
1181 data[i++] = priv->dirty_tx[q];
1182 data[i++] = stats->rx_packets;
1183 data[i++] = stats->tx_packets;
1184 data[i++] = stats->rx_bytes;
1185 data[i++] = stats->tx_bytes;
1186 data[i++] = stats->multicast;
1187 data[i++] = stats->rx_errors;
1188 data[i++] = stats->rx_crc_errors;
1189 data[i++] = stats->rx_frame_errors;
1190 data[i++] = stats->rx_length_errors;
1191 data[i++] = stats->rx_missed_errors;
1192 data[i++] = stats->rx_over_errors;
1196 static void ravb_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
1198 switch (stringset) {
1200 memcpy(data, ravb_gstrings_stats, sizeof(ravb_gstrings_stats));
1205 static void ravb_get_ringparam(struct net_device *ndev,
1206 struct ethtool_ringparam *ring)
1208 struct ravb_private *priv = netdev_priv(ndev);
1210 ring->rx_max_pending = BE_RX_RING_MAX;
1211 ring->tx_max_pending = BE_TX_RING_MAX;
1212 ring->rx_pending = priv->num_rx_ring[RAVB_BE];
1213 ring->tx_pending = priv->num_tx_ring[RAVB_BE];
1216 static int ravb_set_ringparam(struct net_device *ndev,
1217 struct ethtool_ringparam *ring)
1219 struct ravb_private *priv = netdev_priv(ndev);
1222 if (ring->tx_pending > BE_TX_RING_MAX ||
1223 ring->rx_pending > BE_RX_RING_MAX ||
1224 ring->tx_pending < BE_TX_RING_MIN ||
1225 ring->rx_pending < BE_RX_RING_MIN)
1227 if (ring->rx_mini_pending || ring->rx_jumbo_pending)
1230 if (netif_running(ndev)) {
1231 netif_device_detach(ndev);
1232 /* Stop PTP Clock driver */
1233 if (priv->chip_id == RCAR_GEN2)
1234 ravb_ptp_stop(ndev);
1235 /* Wait for DMA stopping */
1236 error = ravb_stop_dma(ndev);
1239 "cannot set ringparam! Any AVB processes are still running?\n");
1242 synchronize_irq(ndev->irq);
1244 /* Free all the skb's in the RX queue and the DMA buffers. */
1245 ravb_ring_free(ndev, RAVB_BE);
1246 ravb_ring_free(ndev, RAVB_NC);
1249 /* Set new parameters */
1250 priv->num_rx_ring[RAVB_BE] = ring->rx_pending;
1251 priv->num_tx_ring[RAVB_BE] = ring->tx_pending;
1253 if (netif_running(ndev)) {
1254 error = ravb_dmac_init(ndev);
1257 "%s: ravb_dmac_init() failed, error %d\n",
1262 ravb_emac_init(ndev);
1264 /* Initialise PTP Clock driver */
1265 if (priv->chip_id == RCAR_GEN2)
1266 ravb_ptp_init(ndev, priv->pdev);
1268 netif_device_attach(ndev);
1274 static int ravb_get_ts_info(struct net_device *ndev,
1275 struct ethtool_ts_info *info)
1277 struct ravb_private *priv = netdev_priv(ndev);
1279 info->so_timestamping =
1280 SOF_TIMESTAMPING_TX_SOFTWARE |
1281 SOF_TIMESTAMPING_RX_SOFTWARE |
1282 SOF_TIMESTAMPING_SOFTWARE |
1283 SOF_TIMESTAMPING_TX_HARDWARE |
1284 SOF_TIMESTAMPING_RX_HARDWARE |
1285 SOF_TIMESTAMPING_RAW_HARDWARE;
1286 info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON);
1288 (1 << HWTSTAMP_FILTER_NONE) |
1289 (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
1290 (1 << HWTSTAMP_FILTER_ALL);
1291 info->phc_index = ptp_clock_index(priv->ptp.clock);
1296 static void ravb_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
1298 struct ravb_private *priv = netdev_priv(ndev);
1300 wol->supported = WAKE_MAGIC;
1301 wol->wolopts = priv->wol_enabled ? WAKE_MAGIC : 0;
1304 static int ravb_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
1306 struct ravb_private *priv = netdev_priv(ndev);
1308 if (wol->wolopts & ~WAKE_MAGIC)
1311 priv->wol_enabled = !!(wol->wolopts & WAKE_MAGIC);
1313 device_set_wakeup_enable(&priv->pdev->dev, priv->wol_enabled);
1318 static const struct ethtool_ops ravb_ethtool_ops = {
1319 .nway_reset = phy_ethtool_nway_reset,
1320 .get_msglevel = ravb_get_msglevel,
1321 .set_msglevel = ravb_set_msglevel,
1322 .get_link = ethtool_op_get_link,
1323 .get_strings = ravb_get_strings,
1324 .get_ethtool_stats = ravb_get_ethtool_stats,
1325 .get_sset_count = ravb_get_sset_count,
1326 .get_ringparam = ravb_get_ringparam,
1327 .set_ringparam = ravb_set_ringparam,
1328 .get_ts_info = ravb_get_ts_info,
1329 .get_link_ksettings = phy_ethtool_get_link_ksettings,
1330 .set_link_ksettings = phy_ethtool_set_link_ksettings,
1331 .get_wol = ravb_get_wol,
1332 .set_wol = ravb_set_wol,
1335 static inline int ravb_hook_irq(unsigned int irq, irq_handler_t handler,
1336 struct net_device *ndev, struct device *dev,
1342 name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s", ndev->name, ch);
1345 error = request_irq(irq, handler, 0, name, ndev);
1347 netdev_err(ndev, "cannot request IRQ %s\n", name);
1352 /* Network device open function for Ethernet AVB */
1353 static int ravb_open(struct net_device *ndev)
1355 struct ravb_private *priv = netdev_priv(ndev);
1356 struct platform_device *pdev = priv->pdev;
1357 struct device *dev = &pdev->dev;
1360 napi_enable(&priv->napi[RAVB_BE]);
1361 napi_enable(&priv->napi[RAVB_NC]);
1363 if (priv->chip_id == RCAR_GEN2) {
1364 error = request_irq(ndev->irq, ravb_interrupt, IRQF_SHARED,
1367 netdev_err(ndev, "cannot request IRQ\n");
1371 error = ravb_hook_irq(ndev->irq, ravb_multi_interrupt, ndev,
1375 error = ravb_hook_irq(priv->emac_irq, ravb_emac_interrupt, ndev,
1379 error = ravb_hook_irq(priv->rx_irqs[RAVB_BE], ravb_be_interrupt,
1380 ndev, dev, "ch0:rx_be");
1382 goto out_free_irq_emac;
1383 error = ravb_hook_irq(priv->tx_irqs[RAVB_BE], ravb_be_interrupt,
1384 ndev, dev, "ch18:tx_be");
1386 goto out_free_irq_be_rx;
1387 error = ravb_hook_irq(priv->rx_irqs[RAVB_NC], ravb_nc_interrupt,
1388 ndev, dev, "ch1:rx_nc");
1390 goto out_free_irq_be_tx;
1391 error = ravb_hook_irq(priv->tx_irqs[RAVB_NC], ravb_nc_interrupt,
1392 ndev, dev, "ch19:tx_nc");
1394 goto out_free_irq_nc_rx;
1398 error = ravb_dmac_init(ndev);
1400 goto out_free_irq_nc_tx;
1401 ravb_emac_init(ndev);
1403 /* Initialise PTP Clock driver */
1404 if (priv->chip_id == RCAR_GEN2)
1405 ravb_ptp_init(ndev, priv->pdev);
1407 netif_tx_start_all_queues(ndev);
1409 /* PHY control start */
1410 error = ravb_phy_start(ndev);
1417 /* Stop PTP Clock driver */
1418 if (priv->chip_id == RCAR_GEN2)
1419 ravb_ptp_stop(ndev);
1421 if (priv->chip_id == RCAR_GEN2)
1423 free_irq(priv->tx_irqs[RAVB_NC], ndev);
1425 free_irq(priv->rx_irqs[RAVB_NC], ndev);
1427 free_irq(priv->tx_irqs[RAVB_BE], ndev);
1429 free_irq(priv->rx_irqs[RAVB_BE], ndev);
1431 free_irq(priv->emac_irq, ndev);
1433 free_irq(ndev->irq, ndev);
1435 napi_disable(&priv->napi[RAVB_NC]);
1436 napi_disable(&priv->napi[RAVB_BE]);
1440 /* Timeout function for Ethernet AVB */
1441 static void ravb_tx_timeout(struct net_device *ndev)
1443 struct ravb_private *priv = netdev_priv(ndev);
1445 netif_err(priv, tx_err, ndev,
1446 "transmit timed out, status %08x, resetting...\n",
1447 ravb_read(ndev, ISS));
1449 /* tx_errors count up */
1450 ndev->stats.tx_errors++;
1452 schedule_work(&priv->work);
1455 static void ravb_tx_timeout_work(struct work_struct *work)
1457 struct ravb_private *priv = container_of(work, struct ravb_private,
1459 struct net_device *ndev = priv->ndev;
1461 netif_tx_stop_all_queues(ndev);
1463 /* Stop PTP Clock driver */
1464 if (priv->chip_id == RCAR_GEN2)
1465 ravb_ptp_stop(ndev);
1467 /* Wait for DMA stopping */
1468 ravb_stop_dma(ndev);
1470 ravb_ring_free(ndev, RAVB_BE);
1471 ravb_ring_free(ndev, RAVB_NC);
1474 ravb_dmac_init(ndev);
1475 ravb_emac_init(ndev);
1477 /* Initialise PTP Clock driver */
1478 if (priv->chip_id == RCAR_GEN2)
1479 ravb_ptp_init(ndev, priv->pdev);
1481 netif_tx_start_all_queues(ndev);
1484 /* Packet transmit function for Ethernet AVB */
1485 static netdev_tx_t ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1487 struct ravb_private *priv = netdev_priv(ndev);
1488 int num_tx_desc = priv->num_tx_desc;
1489 u16 q = skb_get_queue_mapping(skb);
1490 struct ravb_tstamp_skb *ts_skb;
1491 struct ravb_tx_desc *desc;
1492 unsigned long flags;
1498 spin_lock_irqsave(&priv->lock, flags);
1499 if (priv->cur_tx[q] - priv->dirty_tx[q] > (priv->num_tx_ring[q] - 1) *
1501 netif_err(priv, tx_queued, ndev,
1502 "still transmitting with the full ring!\n");
1503 netif_stop_subqueue(ndev, q);
1504 spin_unlock_irqrestore(&priv->lock, flags);
1505 return NETDEV_TX_BUSY;
1508 if (skb_put_padto(skb, ETH_ZLEN))
1511 entry = priv->cur_tx[q] % (priv->num_tx_ring[q] * num_tx_desc);
1512 priv->tx_skb[q][entry / num_tx_desc] = skb;
1514 if (num_tx_desc > 1) {
1515 buffer = PTR_ALIGN(priv->tx_align[q], DPTR_ALIGN) +
1516 entry / num_tx_desc * DPTR_ALIGN;
1517 len = PTR_ALIGN(skb->data, DPTR_ALIGN) - skb->data;
1519 /* Zero length DMA descriptors are problematic as they seem
1520 * to terminate DMA transfers. Avoid them by simply using a
1521 * length of DPTR_ALIGN (4) when skb data is aligned to
1524 * As skb is guaranteed to have at least ETH_ZLEN (60)
1525 * bytes of data by the call to skb_put_padto() above this
1526 * is safe with respect to both the length of the first DMA
1527 * descriptor (len) overflowing the available data and the
1528 * length of the second DMA descriptor (skb->len - len)
1534 memcpy(buffer, skb->data, len);
1535 dma_addr = dma_map_single(ndev->dev.parent, buffer, len,
1537 if (dma_mapping_error(ndev->dev.parent, dma_addr))
1540 desc = &priv->tx_ring[q][entry];
1541 desc->ds_tagl = cpu_to_le16(len);
1542 desc->dptr = cpu_to_le32(dma_addr);
1544 buffer = skb->data + len;
1545 len = skb->len - len;
1546 dma_addr = dma_map_single(ndev->dev.parent, buffer, len,
1548 if (dma_mapping_error(ndev->dev.parent, dma_addr))
1553 desc = &priv->tx_ring[q][entry];
1555 dma_addr = dma_map_single(ndev->dev.parent, skb->data, skb->len,
1557 if (dma_mapping_error(ndev->dev.parent, dma_addr))
1560 desc->ds_tagl = cpu_to_le16(len);
1561 desc->dptr = cpu_to_le32(dma_addr);
1563 /* TX timestamp required */
1565 ts_skb = kmalloc(sizeof(*ts_skb), GFP_ATOMIC);
1567 if (num_tx_desc > 1) {
1569 dma_unmap_single(ndev->dev.parent, dma_addr,
1570 len, DMA_TO_DEVICE);
1575 ts_skb->tag = priv->ts_skb_tag++;
1576 priv->ts_skb_tag &= 0x3ff;
1577 list_add_tail(&ts_skb->list, &priv->ts_skb_list);
1579 /* TAG and timestamp required flag */
1580 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1581 desc->tagh_tsr = (ts_skb->tag >> 4) | TX_TSR;
1582 desc->ds_tagl |= cpu_to_le16(ts_skb->tag << 12);
1585 skb_tx_timestamp(skb);
1586 /* Descriptor type must be set after all the above writes */
1588 if (num_tx_desc > 1) {
1589 desc->die_dt = DT_FEND;
1591 desc->die_dt = DT_FSTART;
1593 desc->die_dt = DT_FSINGLE;
1595 ravb_modify(ndev, TCCR, TCCR_TSRQ0 << q, TCCR_TSRQ0 << q);
1597 priv->cur_tx[q] += num_tx_desc;
1598 if (priv->cur_tx[q] - priv->dirty_tx[q] >
1599 (priv->num_tx_ring[q] - 1) * num_tx_desc &&
1600 !ravb_tx_free(ndev, q, true))
1601 netif_stop_subqueue(ndev, q);
1605 spin_unlock_irqrestore(&priv->lock, flags);
1606 return NETDEV_TX_OK;
1609 dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
1610 le16_to_cpu(desc->ds_tagl), DMA_TO_DEVICE);
1612 dev_kfree_skb_any(skb);
1613 priv->tx_skb[q][entry / num_tx_desc] = NULL;
1617 static u16 ravb_select_queue(struct net_device *ndev, struct sk_buff *skb,
1618 struct net_device *sb_dev,
1619 select_queue_fallback_t fallback)
1621 /* If skb needs TX timestamp, it is handled in network control queue */
1622 return (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) ? RAVB_NC :
1627 static struct net_device_stats *ravb_get_stats(struct net_device *ndev)
1629 struct ravb_private *priv = netdev_priv(ndev);
1630 struct net_device_stats *nstats, *stats0, *stats1;
1632 nstats = &ndev->stats;
1633 stats0 = &priv->stats[RAVB_BE];
1634 stats1 = &priv->stats[RAVB_NC];
1636 nstats->tx_dropped += ravb_read(ndev, TROCR);
1637 ravb_write(ndev, 0, TROCR); /* (write clear) */
1638 nstats->collisions += ravb_read(ndev, CDCR);
1639 ravb_write(ndev, 0, CDCR); /* (write clear) */
1640 nstats->tx_carrier_errors += ravb_read(ndev, LCCR);
1641 ravb_write(ndev, 0, LCCR); /* (write clear) */
1643 nstats->tx_carrier_errors += ravb_read(ndev, CERCR);
1644 ravb_write(ndev, 0, CERCR); /* (write clear) */
1645 nstats->tx_carrier_errors += ravb_read(ndev, CEECR);
1646 ravb_write(ndev, 0, CEECR); /* (write clear) */
1648 nstats->rx_packets = stats0->rx_packets + stats1->rx_packets;
1649 nstats->tx_packets = stats0->tx_packets + stats1->tx_packets;
1650 nstats->rx_bytes = stats0->rx_bytes + stats1->rx_bytes;
1651 nstats->tx_bytes = stats0->tx_bytes + stats1->tx_bytes;
1652 nstats->multicast = stats0->multicast + stats1->multicast;
1653 nstats->rx_errors = stats0->rx_errors + stats1->rx_errors;
1654 nstats->rx_crc_errors = stats0->rx_crc_errors + stats1->rx_crc_errors;
1655 nstats->rx_frame_errors =
1656 stats0->rx_frame_errors + stats1->rx_frame_errors;
1657 nstats->rx_length_errors =
1658 stats0->rx_length_errors + stats1->rx_length_errors;
1659 nstats->rx_missed_errors =
1660 stats0->rx_missed_errors + stats1->rx_missed_errors;
1661 nstats->rx_over_errors =
1662 stats0->rx_over_errors + stats1->rx_over_errors;
1667 /* Update promiscuous bit */
1668 static void ravb_set_rx_mode(struct net_device *ndev)
1670 struct ravb_private *priv = netdev_priv(ndev);
1671 unsigned long flags;
1673 spin_lock_irqsave(&priv->lock, flags);
1674 ravb_modify(ndev, ECMR, ECMR_PRM,
1675 ndev->flags & IFF_PROMISC ? ECMR_PRM : 0);
1677 spin_unlock_irqrestore(&priv->lock, flags);
1680 /* Device close function for Ethernet AVB */
1681 static int ravb_close(struct net_device *ndev)
1683 struct device_node *np = ndev->dev.parent->of_node;
1684 struct ravb_private *priv = netdev_priv(ndev);
1685 struct ravb_tstamp_skb *ts_skb, *ts_skb2;
1687 netif_tx_stop_all_queues(ndev);
1689 /* Disable interrupts by clearing the interrupt masks. */
1690 ravb_write(ndev, 0, RIC0);
1691 ravb_write(ndev, 0, RIC2);
1692 ravb_write(ndev, 0, TIC);
1694 /* Stop PTP Clock driver */
1695 if (priv->chip_id == RCAR_GEN2)
1696 ravb_ptp_stop(ndev);
1698 /* Set the config mode to stop the AVB-DMAC's processes */
1699 if (ravb_stop_dma(ndev) < 0)
1701 "device will be stopped after h/w processes are done.\n");
1703 /* Clear the timestamp list */
1704 list_for_each_entry_safe(ts_skb, ts_skb2, &priv->ts_skb_list, list) {
1705 list_del(&ts_skb->list);
1709 /* PHY disconnect */
1711 phy_stop(ndev->phydev);
1712 phy_disconnect(ndev->phydev);
1713 if (of_phy_is_fixed_link(np))
1714 of_phy_deregister_fixed_link(np);
1717 if (priv->chip_id != RCAR_GEN2) {
1718 free_irq(priv->tx_irqs[RAVB_NC], ndev);
1719 free_irq(priv->rx_irqs[RAVB_NC], ndev);
1720 free_irq(priv->tx_irqs[RAVB_BE], ndev);
1721 free_irq(priv->rx_irqs[RAVB_BE], ndev);
1722 free_irq(priv->emac_irq, ndev);
1724 free_irq(ndev->irq, ndev);
1726 napi_disable(&priv->napi[RAVB_NC]);
1727 napi_disable(&priv->napi[RAVB_BE]);
1729 /* Free all the skb's in the RX queue and the DMA buffers. */
1730 ravb_ring_free(ndev, RAVB_BE);
1731 ravb_ring_free(ndev, RAVB_NC);
1736 static int ravb_hwtstamp_get(struct net_device *ndev, struct ifreq *req)
1738 struct ravb_private *priv = netdev_priv(ndev);
1739 struct hwtstamp_config config;
1742 config.tx_type = priv->tstamp_tx_ctrl ? HWTSTAMP_TX_ON :
1744 if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_V2_L2_EVENT)
1745 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
1746 else if (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE_ALL)
1747 config.rx_filter = HWTSTAMP_FILTER_ALL;
1749 config.rx_filter = HWTSTAMP_FILTER_NONE;
1751 return copy_to_user(req->ifr_data, &config, sizeof(config)) ?
1755 /* Control hardware time stamping */
1756 static int ravb_hwtstamp_set(struct net_device *ndev, struct ifreq *req)
1758 struct ravb_private *priv = netdev_priv(ndev);
1759 struct hwtstamp_config config;
1760 u32 tstamp_rx_ctrl = RAVB_RXTSTAMP_ENABLED;
1763 if (copy_from_user(&config, req->ifr_data, sizeof(config)))
1766 /* Reserved for future extensions */
1770 switch (config.tx_type) {
1771 case HWTSTAMP_TX_OFF:
1774 case HWTSTAMP_TX_ON:
1775 tstamp_tx_ctrl = RAVB_TXTSTAMP_ENABLED;
1781 switch (config.rx_filter) {
1782 case HWTSTAMP_FILTER_NONE:
1785 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1786 tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_V2_L2_EVENT;
1789 config.rx_filter = HWTSTAMP_FILTER_ALL;
1790 tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_ALL;
1793 priv->tstamp_tx_ctrl = tstamp_tx_ctrl;
1794 priv->tstamp_rx_ctrl = tstamp_rx_ctrl;
1796 return copy_to_user(req->ifr_data, &config, sizeof(config)) ?
1800 /* ioctl to device function */
1801 static int ravb_do_ioctl(struct net_device *ndev, struct ifreq *req, int cmd)
1803 struct phy_device *phydev = ndev->phydev;
1805 if (!netif_running(ndev))
1813 return ravb_hwtstamp_get(ndev, req);
1815 return ravb_hwtstamp_set(ndev, req);
1818 return phy_mii_ioctl(phydev, req, cmd);
1821 static int ravb_change_mtu(struct net_device *ndev, int new_mtu)
1823 if (netif_running(ndev))
1826 ndev->mtu = new_mtu;
1827 netdev_update_features(ndev);
1832 static void ravb_set_rx_csum(struct net_device *ndev, bool enable)
1834 struct ravb_private *priv = netdev_priv(ndev);
1835 unsigned long flags;
1837 spin_lock_irqsave(&priv->lock, flags);
1839 /* Disable TX and RX */
1840 ravb_rcv_snd_disable(ndev);
1842 /* Modify RX Checksum setting */
1843 ravb_modify(ndev, ECMR, ECMR_RCSC, enable ? ECMR_RCSC : 0);
1845 /* Enable TX and RX */
1846 ravb_rcv_snd_enable(ndev);
1848 spin_unlock_irqrestore(&priv->lock, flags);
1851 static int ravb_set_features(struct net_device *ndev,
1852 netdev_features_t features)
1854 netdev_features_t changed = ndev->features ^ features;
1856 if (changed & NETIF_F_RXCSUM)
1857 ravb_set_rx_csum(ndev, features & NETIF_F_RXCSUM);
1859 ndev->features = features;
1864 static const struct net_device_ops ravb_netdev_ops = {
1865 .ndo_open = ravb_open,
1866 .ndo_stop = ravb_close,
1867 .ndo_start_xmit = ravb_start_xmit,
1868 .ndo_select_queue = ravb_select_queue,
1869 .ndo_get_stats = ravb_get_stats,
1870 .ndo_set_rx_mode = ravb_set_rx_mode,
1871 .ndo_tx_timeout = ravb_tx_timeout,
1872 .ndo_do_ioctl = ravb_do_ioctl,
1873 .ndo_change_mtu = ravb_change_mtu,
1874 .ndo_validate_addr = eth_validate_addr,
1875 .ndo_set_mac_address = eth_mac_addr,
1876 .ndo_set_features = ravb_set_features,
1879 /* MDIO bus init function */
1880 static int ravb_mdio_init(struct ravb_private *priv)
1882 struct platform_device *pdev = priv->pdev;
1883 struct device *dev = &pdev->dev;
1887 priv->mdiobb.ops = &bb_ops;
1889 /* MII controller setting */
1890 priv->mii_bus = alloc_mdio_bitbang(&priv->mdiobb);
1894 /* Hook up MII support for ethtool */
1895 priv->mii_bus->name = "ravb_mii";
1896 priv->mii_bus->parent = dev;
1897 snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
1898 pdev->name, pdev->id);
1900 /* Register MDIO bus */
1901 error = of_mdiobus_register(priv->mii_bus, dev->of_node);
1908 free_mdio_bitbang(priv->mii_bus);
1912 /* MDIO bus release function */
1913 static int ravb_mdio_release(struct ravb_private *priv)
1915 /* Unregister mdio bus */
1916 mdiobus_unregister(priv->mii_bus);
1918 /* Free bitbang info */
1919 free_mdio_bitbang(priv->mii_bus);
1924 static const struct of_device_id ravb_match_table[] = {
1925 { .compatible = "renesas,etheravb-r8a7790", .data = (void *)RCAR_GEN2 },
1926 { .compatible = "renesas,etheravb-r8a7794", .data = (void *)RCAR_GEN2 },
1927 { .compatible = "renesas,etheravb-rcar-gen2", .data = (void *)RCAR_GEN2 },
1928 { .compatible = "renesas,etheravb-r8a7795", .data = (void *)RCAR_GEN3 },
1929 { .compatible = "renesas,etheravb-rcar-gen3", .data = (void *)RCAR_GEN3 },
1932 MODULE_DEVICE_TABLE(of, ravb_match_table);
1934 static int ravb_set_gti(struct net_device *ndev)
1936 struct ravb_private *priv = netdev_priv(ndev);
1937 struct device *dev = ndev->dev.parent;
1941 rate = clk_get_rate(priv->clk);
1945 inc = 1000000000ULL << 20;
1948 if (inc < GTI_TIV_MIN || inc > GTI_TIV_MAX) {
1949 dev_err(dev, "gti.tiv increment 0x%llx is outside the range 0x%x - 0x%x\n",
1950 inc, GTI_TIV_MIN, GTI_TIV_MAX);
1954 ravb_write(ndev, inc, GTI);
1959 static void ravb_set_config_mode(struct net_device *ndev)
1961 struct ravb_private *priv = netdev_priv(ndev);
1963 if (priv->chip_id == RCAR_GEN2) {
1964 ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_CONFIG);
1965 /* Set CSEL value */
1966 ravb_modify(ndev, CCC, CCC_CSEL, CCC_CSEL_HPB);
1968 ravb_modify(ndev, CCC, CCC_OPC, CCC_OPC_CONFIG |
1969 CCC_GAC | CCC_CSEL_HPB);
1973 /* Set tx and rx clock internal delay modes */
1974 static void ravb_set_delay_mode(struct net_device *ndev)
1976 struct ravb_private *priv = netdev_priv(ndev);
1979 if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
1980 priv->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID)
1983 if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
1984 priv->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID)
1987 ravb_modify(ndev, APSR, APSR_DM, set);
1990 static int ravb_probe(struct platform_device *pdev)
1992 struct device_node *np = pdev->dev.of_node;
1993 struct ravb_private *priv;
1994 enum ravb_chip_id chip_id;
1995 struct net_device *ndev;
1997 struct resource *res;
2002 "this driver is required to be instantiated from device tree\n");
2006 /* Get base address */
2007 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2009 dev_err(&pdev->dev, "invalid resource\n");
2013 ndev = alloc_etherdev_mqs(sizeof(struct ravb_private),
2014 NUM_TX_QUEUE, NUM_RX_QUEUE);
2018 ndev->features = NETIF_F_RXCSUM;
2019 ndev->hw_features = NETIF_F_RXCSUM;
2021 pm_runtime_enable(&pdev->dev);
2022 pm_runtime_get_sync(&pdev->dev);
2024 /* The Ether-specific entries in the device structure. */
2025 ndev->base_addr = res->start;
2027 chip_id = (enum ravb_chip_id)of_device_get_match_data(&pdev->dev);
2029 if (chip_id == RCAR_GEN3)
2030 irq = platform_get_irq_byname(pdev, "ch22");
2032 irq = platform_get_irq(pdev, 0);
2039 SET_NETDEV_DEV(ndev, &pdev->dev);
2041 priv = netdev_priv(ndev);
2044 priv->num_tx_ring[RAVB_BE] = BE_TX_RING_SIZE;
2045 priv->num_rx_ring[RAVB_BE] = BE_RX_RING_SIZE;
2046 priv->num_tx_ring[RAVB_NC] = NC_TX_RING_SIZE;
2047 priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE;
2048 priv->addr = devm_ioremap_resource(&pdev->dev, res);
2049 if (IS_ERR(priv->addr)) {
2050 error = PTR_ERR(priv->addr);
2054 spin_lock_init(&priv->lock);
2055 INIT_WORK(&priv->work, ravb_tx_timeout_work);
2057 priv->phy_interface = of_get_phy_mode(np);
2059 priv->no_avb_link = of_property_read_bool(np, "renesas,no-ether-link");
2060 priv->avb_link_active_low =
2061 of_property_read_bool(np, "renesas,ether-link-active-low");
2063 if (chip_id == RCAR_GEN3) {
2064 irq = platform_get_irq_byname(pdev, "ch24");
2069 priv->emac_irq = irq;
2070 for (i = 0; i < NUM_RX_QUEUE; i++) {
2071 irq = platform_get_irq_byname(pdev, ravb_rx_irqs[i]);
2076 priv->rx_irqs[i] = irq;
2078 for (i = 0; i < NUM_TX_QUEUE; i++) {
2079 irq = platform_get_irq_byname(pdev, ravb_tx_irqs[i]);
2084 priv->tx_irqs[i] = irq;
2088 priv->chip_id = chip_id;
2090 priv->clk = devm_clk_get(&pdev->dev, NULL);
2091 if (IS_ERR(priv->clk)) {
2092 error = PTR_ERR(priv->clk);
2096 ndev->max_mtu = 2048 - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
2097 ndev->min_mtu = ETH_MIN_MTU;
2099 priv->num_tx_desc = chip_id == RCAR_GEN2 ?
2100 NUM_TX_DESC_GEN2 : NUM_TX_DESC_GEN3;
2103 ndev->netdev_ops = &ravb_netdev_ops;
2104 ndev->ethtool_ops = &ravb_ethtool_ops;
2106 /* Set AVB config mode */
2107 ravb_set_config_mode(ndev);
2110 error = ravb_set_gti(ndev);
2114 /* Request GTI loading */
2115 ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
2117 if (priv->chip_id != RCAR_GEN2)
2118 ravb_set_delay_mode(ndev);
2120 /* Allocate descriptor base address table */
2121 priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM;
2122 priv->desc_bat = dma_alloc_coherent(ndev->dev.parent, priv->desc_bat_size,
2123 &priv->desc_bat_dma, GFP_KERNEL);
2124 if (!priv->desc_bat) {
2126 "Cannot allocate desc base address table (size %d bytes)\n",
2127 priv->desc_bat_size);
2131 for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++)
2132 priv->desc_bat[q].die_dt = DT_EOS;
2133 ravb_write(ndev, priv->desc_bat_dma, DBAT);
2135 /* Initialise HW timestamp list */
2136 INIT_LIST_HEAD(&priv->ts_skb_list);
2138 /* Initialise PTP Clock driver */
2139 if (chip_id != RCAR_GEN2)
2140 ravb_ptp_init(ndev, pdev);
2142 /* Debug message level */
2143 priv->msg_enable = RAVB_DEF_MSG_ENABLE;
2145 /* Read and set MAC address */
2146 ravb_read_mac_address(ndev, of_get_mac_address(np));
2147 if (!is_valid_ether_addr(ndev->dev_addr)) {
2148 dev_warn(&pdev->dev,
2149 "no valid MAC address supplied, using a random one\n");
2150 eth_hw_addr_random(ndev);
2154 error = ravb_mdio_init(priv);
2156 dev_err(&pdev->dev, "failed to initialize MDIO\n");
2160 netif_napi_add(ndev, &priv->napi[RAVB_BE], ravb_poll, 64);
2161 netif_napi_add(ndev, &priv->napi[RAVB_NC], ravb_poll, 64);
2163 /* Network device register */
2164 error = register_netdev(ndev);
2168 device_set_wakeup_capable(&pdev->dev, 1);
2170 /* Print device information */
2171 netdev_info(ndev, "Base address at %#x, %pM, IRQ %d.\n",
2172 (u32)ndev->base_addr, ndev->dev_addr, ndev->irq);
2174 platform_set_drvdata(pdev, ndev);
2179 netif_napi_del(&priv->napi[RAVB_NC]);
2180 netif_napi_del(&priv->napi[RAVB_BE]);
2181 ravb_mdio_release(priv);
2183 dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
2184 priv->desc_bat_dma);
2186 /* Stop PTP Clock driver */
2187 if (chip_id != RCAR_GEN2)
2188 ravb_ptp_stop(ndev);
2192 pm_runtime_put(&pdev->dev);
2193 pm_runtime_disable(&pdev->dev);
2197 static int ravb_remove(struct platform_device *pdev)
2199 struct net_device *ndev = platform_get_drvdata(pdev);
2200 struct ravb_private *priv = netdev_priv(ndev);
2202 /* Stop PTP Clock driver */
2203 if (priv->chip_id != RCAR_GEN2)
2204 ravb_ptp_stop(ndev);
2206 dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
2207 priv->desc_bat_dma);
2208 /* Set reset mode */
2209 ravb_write(ndev, CCC_OPC_RESET, CCC);
2210 pm_runtime_put_sync(&pdev->dev);
2211 unregister_netdev(ndev);
2212 netif_napi_del(&priv->napi[RAVB_NC]);
2213 netif_napi_del(&priv->napi[RAVB_BE]);
2214 ravb_mdio_release(priv);
2215 pm_runtime_disable(&pdev->dev);
2217 platform_set_drvdata(pdev, NULL);
2222 static int ravb_wol_setup(struct net_device *ndev)
2224 struct ravb_private *priv = netdev_priv(ndev);
2226 /* Disable interrupts by clearing the interrupt masks. */
2227 ravb_write(ndev, 0, RIC0);
2228 ravb_write(ndev, 0, RIC2);
2229 ravb_write(ndev, 0, TIC);
2231 /* Only allow ECI interrupts */
2232 synchronize_irq(priv->emac_irq);
2233 napi_disable(&priv->napi[RAVB_NC]);
2234 napi_disable(&priv->napi[RAVB_BE]);
2235 ravb_write(ndev, ECSIPR_MPDIP, ECSIPR);
2237 /* Enable MagicPacket */
2238 ravb_modify(ndev, ECMR, ECMR_MPDE, ECMR_MPDE);
2240 return enable_irq_wake(priv->emac_irq);
2243 static int ravb_wol_restore(struct net_device *ndev)
2245 struct ravb_private *priv = netdev_priv(ndev);
2248 napi_enable(&priv->napi[RAVB_NC]);
2249 napi_enable(&priv->napi[RAVB_BE]);
2251 /* Disable MagicPacket */
2252 ravb_modify(ndev, ECMR, ECMR_MPDE, 0);
2254 ret = ravb_close(ndev);
2258 return disable_irq_wake(priv->emac_irq);
2261 static int __maybe_unused ravb_suspend(struct device *dev)
2263 struct net_device *ndev = dev_get_drvdata(dev);
2264 struct ravb_private *priv = netdev_priv(ndev);
2267 if (!netif_running(ndev))
2270 netif_device_detach(ndev);
2272 if (priv->wol_enabled)
2273 ret = ravb_wol_setup(ndev);
2275 ret = ravb_close(ndev);
2280 static int __maybe_unused ravb_resume(struct device *dev)
2282 struct net_device *ndev = dev_get_drvdata(dev);
2283 struct ravb_private *priv = netdev_priv(ndev);
2286 /* If WoL is enabled set reset mode to rearm the WoL logic */
2287 if (priv->wol_enabled)
2288 ravb_write(ndev, CCC_OPC_RESET, CCC);
2290 /* All register have been reset to default values.
2291 * Restore all registers which where setup at probe time and
2292 * reopen device if it was running before system suspended.
2295 /* Set AVB config mode */
2296 ravb_set_config_mode(ndev);
2299 ret = ravb_set_gti(ndev);
2303 /* Request GTI loading */
2304 ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
2306 if (priv->chip_id != RCAR_GEN2)
2307 ravb_set_delay_mode(ndev);
2309 /* Restore descriptor base address table */
2310 ravb_write(ndev, priv->desc_bat_dma, DBAT);
2312 if (netif_running(ndev)) {
2313 if (priv->wol_enabled) {
2314 ret = ravb_wol_restore(ndev);
2318 ret = ravb_open(ndev);
2321 netif_device_attach(ndev);
2327 static int __maybe_unused ravb_runtime_nop(struct device *dev)
2329 /* Runtime PM callback shared between ->runtime_suspend()
2330 * and ->runtime_resume(). Simply returns success.
2332 * This driver re-initializes all registers after
2333 * pm_runtime_get_sync() anyway so there is no need
2334 * to save and restore registers here.
2339 static const struct dev_pm_ops ravb_dev_pm_ops = {
2340 SET_SYSTEM_SLEEP_PM_OPS(ravb_suspend, ravb_resume)
2341 SET_RUNTIME_PM_OPS(ravb_runtime_nop, ravb_runtime_nop, NULL)
2344 static struct platform_driver ravb_driver = {
2345 .probe = ravb_probe,
2346 .remove = ravb_remove,
2349 .pm = &ravb_dev_pm_ops,
2350 .of_match_table = ravb_match_table,
2354 module_platform_driver(ravb_driver);
2356 MODULE_AUTHOR("Mitsuhiro Kimura, Masaru Nagai");
2357 MODULE_DESCRIPTION("Renesas Ethernet AVB driver");
2358 MODULE_LICENSE("GPL v2");