1 // SPDX-License-Identifier: GPL-2.0
2 /**
3  * sni_ave.c - Socionext UniPhier AVE ethernet driver
4  * Copyright 2014 Panasonic Corporation
5  * Copyright 2015-2017 Socionext Inc.
6  */
7 
8 #include <linux/bitops.h>
9 #include <linux/clk.h>
10 #include <linux/etherdevice.h>
11 #include <linux/interrupt.h>
12 #include <linux/io.h>
13 #include <linux/iopoll.h>
14 #include <linux/mfd/syscon.h>
15 #include <linux/mii.h>
16 #include <linux/module.h>
17 #include <linux/netdevice.h>
18 #include <linux/of_net.h>
19 #include <linux/of_mdio.h>
20 #include <linux/of_platform.h>
21 #include <linux/phy.h>
22 #include <linux/regmap.h>
23 #include <linux/reset.h>
24 #include <linux/types.h>
25 #include <linux/u64_stats_sync.h>
26 
27 /* General Register Group */
28 #define AVE_IDR			0x000	/* ID */
29 #define AVE_VR			0x004	/* Version */
30 #define AVE_GRR			0x008	/* Global Reset */
31 #define AVE_CFGR		0x00c	/* Configuration */
32 
33 /* Interrupt Register Group */
34 #define AVE_GIMR		0x100	/* Global Interrupt Mask */
35 #define AVE_GISR		0x104	/* Global Interrupt Status */
36 
37 /* MAC Register Group */
38 #define AVE_TXCR		0x200	/* TX Setup */
39 #define AVE_RXCR		0x204	/* RX Setup */
40 #define AVE_RXMAC1R		0x208	/* MAC address (lower) */
41 #define AVE_RXMAC2R		0x20c	/* MAC address (upper) */
42 #define AVE_MDIOCTR		0x214	/* MDIO Control */
43 #define AVE_MDIOAR		0x218	/* MDIO Address */
44 #define AVE_MDIOWDR		0x21c	/* MDIO Data */
45 #define AVE_MDIOSR		0x220	/* MDIO Status */
46 #define AVE_MDIORDR		0x224	/* MDIO Rd Data */
47 
48 /* Descriptor Control Register Group */
49 #define AVE_DESCC		0x300	/* Descriptor Control */
50 #define AVE_TXDC		0x304	/* TX Descriptor Configuration */
51 #define AVE_RXDC0		0x308	/* RX Descriptor Ring0 Configuration */
52 #define AVE_IIRQC		0x34c	/* Interval IRQ Control */
53 
54 /* Packet Filter Register Group */
55 #define AVE_PKTF_BASE		0x800	/* PF Base Address */
56 #define AVE_PFMBYTE_BASE	0xd00	/* PF Mask Byte Base Address */
57 #define AVE_PFMBIT_BASE		0xe00	/* PF Mask Bit Base Address */
58 #define AVE_PFSEL_BASE		0xf00	/* PF Selector Base Address */
59 #define AVE_PFEN		0xffc	/* Packet Filter Enable */
60 #define AVE_PKTF(ent)		(AVE_PKTF_BASE + (ent) * 0x40)
61 #define AVE_PFMBYTE(ent)	(AVE_PFMBYTE_BASE + (ent) * 8)
62 #define AVE_PFMBIT(ent)		(AVE_PFMBIT_BASE + (ent) * 4)
63 #define AVE_PFSEL(ent)		(AVE_PFSEL_BASE + (ent) * 4)
64 
65 /* 64bit descriptor memory */
66 #define AVE_DESC_SIZE_64	12	/* Descriptor Size */
67 
68 #define AVE_TXDM_64		0x1000	/* Tx Descriptor Memory */
69 #define AVE_RXDM_64		0x1c00	/* Rx Descriptor Memory */
70 
71 #define AVE_TXDM_SIZE_64	0x0ba0	/* Tx Descriptor Memory Size 3KB */
72 #define AVE_RXDM_SIZE_64	0x6000	/* Rx Descriptor Memory Size 24KB */
73 
74 /* 32bit descriptor memory */
75 #define AVE_DESC_SIZE_32	8	/* Descriptor Size */
76 
77 #define AVE_TXDM_32		0x1000	/* Tx Descriptor Memory */
78 #define AVE_RXDM_32		0x1800	/* Rx Descriptor Memory */
79 
80 #define AVE_TXDM_SIZE_32	0x07c0	/* Tx Descriptor Memory Size 2KB */
81 #define AVE_RXDM_SIZE_32	0x4000	/* Rx Descriptor Memory Size 16KB */
82 
83 /* RMII Bridge Register Group */
84 #define AVE_RSTCTRL		0x8028	/* Reset control */
85 #define AVE_RSTCTRL_RMIIRST	BIT(16)
86 #define AVE_LINKSEL		0x8034	/* Link speed setting */
87 #define AVE_LINKSEL_100M	BIT(0)
88 
89 /* AVE_GRR */
90 #define AVE_GRR_RXFFR		BIT(5)	/* Reset RxFIFO */
91 #define AVE_GRR_PHYRST		BIT(4)	/* Reset external PHY */
92 #define AVE_GRR_GRST		BIT(0)	/* Reset all MAC */
93 
94 /* AVE_CFGR */
95 #define AVE_CFGR_FLE		BIT(31)	/* Filter Function */
96 #define AVE_CFGR_CHE		BIT(30)	/* Checksum Function */
97 #define AVE_CFGR_MII		BIT(27)	/* Func mode (1:MII/RMII, 0:RGMII) */
98 #define AVE_CFGR_IPFCEN		BIT(24)	/* IP fragment sum Enable */
99 
100 /* AVE_GISR (common with GIMR) */
101 #define AVE_GI_PHY		BIT(24)	/* PHY interrupt */
102 #define AVE_GI_TX		BIT(16)	/* Tx complete */
103 #define AVE_GI_RXERR		BIT(8)	/* Receive frame more than max size */
104 #define AVE_GI_RXOVF		BIT(7)	/* Overflow at the RxFIFO */
105 #define AVE_GI_RXDROP		BIT(6)	/* Drop packet */
106 #define AVE_GI_RXIINT		BIT(5)	/* Interval interrupt */
107 
108 /* AVE_TXCR */
109 #define AVE_TXCR_FLOCTR		BIT(18)	/* Flow control */
110 #define AVE_TXCR_TXSPD_1G	BIT(17)
111 #define AVE_TXCR_TXSPD_100	BIT(16)
112 
113 /* AVE_RXCR */
114 #define AVE_RXCR_RXEN		BIT(30)	/* Rx enable */
115 #define AVE_RXCR_FDUPEN		BIT(22)	/* Interface mode */
116 #define AVE_RXCR_FLOCTR		BIT(21)	/* Flow control */
117 #define AVE_RXCR_AFEN		BIT(19)	/* MAC address filter */
118 #define AVE_RXCR_DRPEN		BIT(18)	/* Drop pause frame */
119 #define AVE_RXCR_MPSIZ_MASK	GENMASK(10, 0)
120 
121 /* AVE_MDIOCTR */
122 #define AVE_MDIOCTR_RREQ	BIT(3)	/* Read request */
123 #define AVE_MDIOCTR_WREQ	BIT(2)	/* Write request */
124 
125 /* AVE_MDIOSR */
126 #define AVE_MDIOSR_STS		BIT(0)	/* access status */
127 
128 /* AVE_DESCC */
129 #define AVE_DESCC_STATUS_MASK	GENMASK(31, 16)
130 #define AVE_DESCC_RD0		BIT(8)	/* Enable Rx descriptor Ring0 */
131 #define AVE_DESCC_RDSTP		BIT(4)	/* Pause Rx descriptor */
132 #define AVE_DESCC_TD		BIT(0)	/* Enable Tx descriptor */
133 
134 /* AVE_TXDC */
135 #define AVE_TXDC_SIZE		GENMASK(27, 16)	/* Size of Tx descriptor */
136 #define AVE_TXDC_ADDR		GENMASK(11, 0)	/* Start address */
137 #define AVE_TXDC_ADDR_START	0
138 
139 /* AVE_RXDC0 */
140 #define AVE_RXDC0_SIZE		GENMASK(30, 16)	/* Size of Rx descriptor */
141 #define AVE_RXDC0_ADDR		GENMASK(14, 0)	/* Start address */
142 #define AVE_RXDC0_ADDR_START	0
143 
144 /* AVE_IIRQC */
145 #define AVE_IIRQC_EN0		BIT(27)	/* Enable interval interrupt Ring0 */
146 #define AVE_IIRQC_BSCK		GENMASK(15, 0)	/* Interval count unit */
147 
148 /* Command status for descriptor */
149 #define AVE_STS_OWN		BIT(31)	/* Descriptor ownership */
150 #define AVE_STS_INTR		BIT(29)	/* Request for interrupt */
151 #define AVE_STS_OK		BIT(27)	/* Normal transmit */
152 /* TX */
153 #define AVE_STS_NOCSUM		BIT(28)	/* No use HW checksum */
154 #define AVE_STS_1ST		BIT(26)	/* Head of buffer chain */
155 #define AVE_STS_LAST		BIT(25)	/* Tail of buffer chain */
156 #define AVE_STS_OWC		BIT(21)	/* Out of window,Late Collision */
157 #define AVE_STS_EC		BIT(20)	/* Excess collision occurred */
158 #define AVE_STS_PKTLEN_TX_MASK	GENMASK(15, 0)
159 /* RX */
160 #define AVE_STS_CSSV		BIT(21)	/* Checksum check performed */
161 #define AVE_STS_CSER		BIT(20)	/* Checksum error detected */
162 #define AVE_STS_PKTLEN_RX_MASK	GENMASK(10, 0)
163 
164 /* Packet filter */
165 #define AVE_PFMBYTE_MASK0	(GENMASK(31, 8) | GENMASK(5, 0))
166 #define AVE_PFMBYTE_MASK1	GENMASK(25, 0)
167 #define AVE_PFMBIT_MASK		GENMASK(15, 0)
168 
169 #define AVE_PF_SIZE		17	/* Number of all packet filter */
170 #define AVE_PF_MULTICAST_SIZE	7	/* Number of multicast filter */
171 
172 #define AVE_PFNUM_FILTER	0	/* No.0 */
173 #define AVE_PFNUM_UNICAST	1	/* No.1 */
174 #define AVE_PFNUM_BROADCAST	2	/* No.2 */
175 #define AVE_PFNUM_MULTICAST	11	/* No.11-17 */
176 
177 /* NETIF Message control */
178 #define AVE_DEFAULT_MSG_ENABLE	(NETIF_MSG_DRV    |	\
179 				 NETIF_MSG_PROBE  |	\
180 				 NETIF_MSG_LINK   |	\
181 				 NETIF_MSG_TIMER  |	\
182 				 NETIF_MSG_IFDOWN |	\
183 				 NETIF_MSG_IFUP   |	\
184 				 NETIF_MSG_RX_ERR |	\
185 				 NETIF_MSG_TX_ERR)
186 
187 /* Parameter for descriptor */
188 #define AVE_NR_TXDESC		64	/* Tx descriptor */
189 #define AVE_NR_RXDESC		256	/* Rx descriptor */
190 
191 #define AVE_DESC_OFS_CMDSTS	0
192 #define AVE_DESC_OFS_ADDRL	4
193 #define AVE_DESC_OFS_ADDRU	8
194 
195 /* Parameter for ethernet frame */
196 #define AVE_MAX_ETHFRAME	1518
197 #define AVE_FRAME_HEADROOM	2
198 
199 /* Parameter for interrupt */
200 #define AVE_INTM_COUNT		20
201 #define AVE_FORCE_TXINTCNT	1
202 
203 /* SG */
204 #define SG_ETPINMODE		0x540
205 #define SG_ETPINMODE_EXTPHY	BIT(1)	/* for LD11 */
206 #define SG_ETPINMODE_RMII(ins)	BIT(ins)
207 
208 #define IS_DESC_64BIT(p)	((p)->data->is_desc_64bit)
209 
210 #define AVE_MAX_CLKS		4
211 #define AVE_MAX_RSTS		2
212 
213 enum desc_id {
214 	AVE_DESCID_RX,
215 	AVE_DESCID_TX,
216 };
217 
218 enum desc_state {
219 	AVE_DESC_RX_PERMIT,
220 	AVE_DESC_RX_SUSPEND,
221 	AVE_DESC_START,
222 	AVE_DESC_STOP,
223 };
224 
225 struct ave_desc {
226 	struct sk_buff	*skbs;
227 	dma_addr_t	skbs_dma;
228 	size_t		skbs_dmalen;
229 };
230 
231 struct ave_desc_info {
232 	u32	ndesc;		/* number of descriptor */
233 	u32	daddr;		/* start address of descriptor */
234 	u32	proc_idx;	/* index of processing packet */
235 	u32	done_idx;	/* index of processed packet */
236 	struct ave_desc *desc;	/* skb info related descriptor */
237 };
238 
239 struct ave_stats {
240 	struct	u64_stats_sync	syncp;
241 	u64	packets;
242 	u64	bytes;
243 	u64	errors;
244 	u64	dropped;
245 	u64	collisions;
246 	u64	fifo_errors;
247 };
248 
249 struct ave_private {
250 	void __iomem            *base;
251 	int                     irq;
252 	int			phy_id;
253 	unsigned int		desc_size;
254 	u32			msg_enable;
255 	int			nclks;
256 	struct clk		*clk[AVE_MAX_CLKS];
257 	int			nrsts;
258 	struct reset_control	*rst[AVE_MAX_RSTS];
259 	phy_interface_t		phy_mode;
260 	struct phy_device	*phydev;
261 	struct mii_bus		*mdio;
262 	struct regmap		*regmap;
263 	unsigned int		pinmode_mask;
264 	unsigned int		pinmode_val;
265 	u32			wolopts;
266 
267 	/* stats */
268 	struct ave_stats	stats_rx;
269 	struct ave_stats	stats_tx;
270 
271 	/* NAPI support */
272 	struct net_device	*ndev;
273 	struct napi_struct	napi_rx;
274 	struct napi_struct	napi_tx;
275 
276 	/* descriptor */
277 	struct ave_desc_info	rx;
278 	struct ave_desc_info	tx;
279 
280 	/* flow control */
281 	int pause_auto;
282 	int pause_rx;
283 	int pause_tx;
284 
285 	const struct ave_soc_data *data;
286 };
287 
288 struct ave_soc_data {
289 	bool	is_desc_64bit;
290 	const char	*clock_names[AVE_MAX_CLKS];
291 	const char	*reset_names[AVE_MAX_RSTS];
292 	int	(*get_pinmode)(struct ave_private *priv,
293 			       phy_interface_t phy_mode, u32 arg);
294 };
295 
296 static u32 ave_desc_read(struct net_device *ndev, enum desc_id id, int entry,
297 			 int offset)
298 {
299 	struct ave_private *priv = netdev_priv(ndev);
300 	u32 addr;
301 
302 	addr = ((id == AVE_DESCID_TX) ? priv->tx.daddr : priv->rx.daddr)
303 		+ entry * priv->desc_size + offset;
304 
305 	return readl(priv->base + addr);
306 }
307 
308 static u32 ave_desc_read_cmdsts(struct net_device *ndev, enum desc_id id,
309 				int entry)
310 {
311 	return ave_desc_read(ndev, id, entry, AVE_DESC_OFS_CMDSTS);
312 }
313 
314 static void ave_desc_write(struct net_device *ndev, enum desc_id id,
315 			   int entry, int offset, u32 val)
316 {
317 	struct ave_private *priv = netdev_priv(ndev);
318 	u32 addr;
319 
320 	addr = ((id == AVE_DESCID_TX) ? priv->tx.daddr : priv->rx.daddr)
321 		+ entry * priv->desc_size + offset;
322 
323 	writel(val, priv->base + addr);
324 }
325 
326 static void ave_desc_write_cmdsts(struct net_device *ndev, enum desc_id id,
327 				  int entry, u32 val)
328 {
329 	ave_desc_write(ndev, id, entry, AVE_DESC_OFS_CMDSTS, val);
330 }
331 
332 static void ave_desc_write_addr(struct net_device *ndev, enum desc_id id,
333 				int entry, dma_addr_t paddr)
334 {
335 	struct ave_private *priv = netdev_priv(ndev);
336 
337 	ave_desc_write(ndev, id, entry, AVE_DESC_OFS_ADDRL,
338 		       lower_32_bits(paddr));
339 	if (IS_DESC_64BIT(priv))
340 		ave_desc_write(ndev, id,
341 			       entry, AVE_DESC_OFS_ADDRU,
342 			       upper_32_bits(paddr));
343 }
344 
345 static u32 ave_irq_disable_all(struct net_device *ndev)
346 {
347 	struct ave_private *priv = netdev_priv(ndev);
348 	u32 ret;
349 
350 	ret = readl(priv->base + AVE_GIMR);
351 	writel(0, priv->base + AVE_GIMR);
352 
353 	return ret;
354 }
355 
356 static void ave_irq_restore(struct net_device *ndev, u32 val)
357 {
358 	struct ave_private *priv = netdev_priv(ndev);
359 
360 	writel(val, priv->base + AVE_GIMR);
361 }
362 
363 static void ave_irq_enable(struct net_device *ndev, u32 bitflag)
364 {
365 	struct ave_private *priv = netdev_priv(ndev);
366 
367 	writel(readl(priv->base + AVE_GIMR) | bitflag, priv->base + AVE_GIMR);
368 	writel(bitflag, priv->base + AVE_GISR);
369 }
370 
371 static void ave_hw_write_macaddr(struct net_device *ndev,
372 				 const unsigned char *mac_addr,
373 				 int reg1, int reg2)
374 {
375 	struct ave_private *priv = netdev_priv(ndev);
376 
377 	writel(mac_addr[0] | mac_addr[1] << 8 |
378 	       mac_addr[2] << 16 | mac_addr[3] << 24, priv->base + reg1);
379 	writel(mac_addr[4] | mac_addr[5] << 8, priv->base + reg2);
380 }
381 
382 static void ave_hw_read_version(struct net_device *ndev, char *buf, int len)
383 {
384 	struct ave_private *priv = netdev_priv(ndev);
385 	u32 major, minor, vr;
386 
387 	vr = readl(priv->base + AVE_VR);
388 	major = (vr & GENMASK(15, 8)) >> 8;
389 	minor = (vr & GENMASK(7, 0));
390 	snprintf(buf, len, "v%u.%u", major, minor);
391 }
392 
393 static void ave_ethtool_get_drvinfo(struct net_device *ndev,
394 				    struct ethtool_drvinfo *info)
395 {
396 	struct device *dev = ndev->dev.parent;
397 
398 	strlcpy(info->driver, dev->driver->name, sizeof(info->driver));
399 	strlcpy(info->bus_info, dev_name(dev), sizeof(info->bus_info));
400 	ave_hw_read_version(ndev, info->fw_version, sizeof(info->fw_version));
401 }
402 
403 static u32 ave_ethtool_get_msglevel(struct net_device *ndev)
404 {
405 	struct ave_private *priv = netdev_priv(ndev);
406 
407 	return priv->msg_enable;
408 }
409 
410 static void ave_ethtool_set_msglevel(struct net_device *ndev, u32 val)
411 {
412 	struct ave_private *priv = netdev_priv(ndev);
413 
414 	priv->msg_enable = val;
415 }
416 
417 static void ave_ethtool_get_wol(struct net_device *ndev,
418 				struct ethtool_wolinfo *wol)
419 {
420 	wol->supported = 0;
421 	wol->wolopts   = 0;
422 
423 	if (ndev->phydev)
424 		phy_ethtool_get_wol(ndev->phydev, wol);
425 }
426 
427 static int __ave_ethtool_set_wol(struct net_device *ndev,
428 				 struct ethtool_wolinfo *wol)
429 {
430 	if (!ndev->phydev ||
431 	    (wol->wolopts & (WAKE_ARP | WAKE_MAGICSECURE)))
432 		return -EOPNOTSUPP;
433 
434 	return phy_ethtool_set_wol(ndev->phydev, wol);
435 }
436 
437 static int ave_ethtool_set_wol(struct net_device *ndev,
438 			       struct ethtool_wolinfo *wol)
439 {
440 	int ret;
441 
442 	ret = __ave_ethtool_set_wol(ndev, wol);
443 	if (!ret)
444 		device_set_wakeup_enable(&ndev->dev, !!wol->wolopts);
445 
446 	return ret;
447 }
448 
449 static void ave_ethtool_get_pauseparam(struct net_device *ndev,
450 				       struct ethtool_pauseparam *pause)
451 {
452 	struct ave_private *priv = netdev_priv(ndev);
453 
454 	pause->autoneg  = priv->pause_auto;
455 	pause->rx_pause = priv->pause_rx;
456 	pause->tx_pause = priv->pause_tx;
457 }
458 
459 static int ave_ethtool_set_pauseparam(struct net_device *ndev,
460 				      struct ethtool_pauseparam *pause)
461 {
462 	struct ave_private *priv = netdev_priv(ndev);
463 	struct phy_device *phydev = ndev->phydev;
464 
465 	if (!phydev)
466 		return -EINVAL;
467 
468 	priv->pause_auto = pause->autoneg;
469 	priv->pause_rx   = pause->rx_pause;
470 	priv->pause_tx   = pause->tx_pause;
471 
472 	phy_set_asym_pause(phydev, pause->rx_pause, pause->tx_pause);
473 
474 	return 0;
475 }
476 
477 static const struct ethtool_ops ave_ethtool_ops = {
478 	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
479 	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
480 	.get_drvinfo		= ave_ethtool_get_drvinfo,
481 	.nway_reset		= phy_ethtool_nway_reset,
482 	.get_link		= ethtool_op_get_link,
483 	.get_msglevel		= ave_ethtool_get_msglevel,
484 	.set_msglevel		= ave_ethtool_set_msglevel,
485 	.get_wol		= ave_ethtool_get_wol,
486 	.set_wol		= ave_ethtool_set_wol,
487 	.get_pauseparam         = ave_ethtool_get_pauseparam,
488 	.set_pauseparam         = ave_ethtool_set_pauseparam,
489 };
490 
491 static int ave_mdiobus_read(struct mii_bus *bus, int phyid, int regnum)
492 {
493 	struct net_device *ndev = bus->priv;
494 	struct ave_private *priv;
495 	u32 mdioctl, mdiosr;
496 	int ret;
497 
498 	priv = netdev_priv(ndev);
499 
500 	/* write address */
501 	writel((phyid << 8) | regnum, priv->base + AVE_MDIOAR);
502 
503 	/* read request */
504 	mdioctl = readl(priv->base + AVE_MDIOCTR);
505 	writel((mdioctl | AVE_MDIOCTR_RREQ) & ~AVE_MDIOCTR_WREQ,
506 	       priv->base + AVE_MDIOCTR);
507 
508 	ret = readl_poll_timeout(priv->base + AVE_MDIOSR, mdiosr,
509 				 !(mdiosr & AVE_MDIOSR_STS), 20, 2000);
510 	if (ret) {
511 		netdev_err(ndev, "failed to read (phy:%d reg:%x)\n",
512 			   phyid, regnum);
513 		return ret;
514 	}
515 
516 	return readl(priv->base + AVE_MDIORDR) & GENMASK(15, 0);
517 }
518 
519 static int ave_mdiobus_write(struct mii_bus *bus, int phyid, int regnum,
520 			     u16 val)
521 {
522 	struct net_device *ndev = bus->priv;
523 	struct ave_private *priv;
524 	u32 mdioctl, mdiosr;
525 	int ret;
526 
527 	priv = netdev_priv(ndev);
528 
529 	/* write address */
530 	writel((phyid << 8) | regnum, priv->base + AVE_MDIOAR);
531 
532 	/* write data */
533 	writel(val, priv->base + AVE_MDIOWDR);
534 
535 	/* write request */
536 	mdioctl = readl(priv->base + AVE_MDIOCTR);
537 	writel((mdioctl | AVE_MDIOCTR_WREQ) & ~AVE_MDIOCTR_RREQ,
538 	       priv->base + AVE_MDIOCTR);
539 
540 	ret = readl_poll_timeout(priv->base + AVE_MDIOSR, mdiosr,
541 				 !(mdiosr & AVE_MDIOSR_STS), 20, 2000);
542 	if (ret)
543 		netdev_err(ndev, "failed to write (phy:%d reg:%x)\n",
544 			   phyid, regnum);
545 
546 	return ret;
547 }
548 
549 static int ave_dma_map(struct net_device *ndev, struct ave_desc *desc,
550 		       void *ptr, size_t len, enum dma_data_direction dir,
551 		       dma_addr_t *paddr)
552 {
553 	dma_addr_t map_addr;
554 
555 	map_addr = dma_map_single(ndev->dev.parent, ptr, len, dir);
556 	if (unlikely(dma_mapping_error(ndev->dev.parent, map_addr)))
557 		return -ENOMEM;
558 
559 	desc->skbs_dma = map_addr;
560 	desc->skbs_dmalen = len;
561 	*paddr = map_addr;
562 
563 	return 0;
564 }
565 
566 static void ave_dma_unmap(struct net_device *ndev, struct ave_desc *desc,
567 			  enum dma_data_direction dir)
568 {
569 	if (!desc->skbs_dma)
570 		return;
571 
572 	dma_unmap_single(ndev->dev.parent,
573 			 desc->skbs_dma, desc->skbs_dmalen, dir);
574 	desc->skbs_dma = 0;
575 }
576 
577 /* Prepare Rx descriptor and memory */
578 static int ave_rxdesc_prepare(struct net_device *ndev, int entry)
579 {
580 	struct ave_private *priv = netdev_priv(ndev);
581 	struct sk_buff *skb;
582 	dma_addr_t paddr;
583 	int ret;
584 
585 	skb = priv->rx.desc[entry].skbs;
586 	if (!skb) {
587 		skb = netdev_alloc_skb(ndev, AVE_MAX_ETHFRAME);
588 		if (!skb) {
589 			netdev_err(ndev, "can't allocate skb for Rx\n");
590 			return -ENOMEM;
591 		}
592 		skb->data += AVE_FRAME_HEADROOM;
593 		skb->tail += AVE_FRAME_HEADROOM;
594 	}
595 
596 	/* set disable to cmdsts */
597 	ave_desc_write_cmdsts(ndev, AVE_DESCID_RX, entry,
598 			      AVE_STS_INTR | AVE_STS_OWN);
599 
600 	/* map Rx buffer
601 	 * Rx buffer set to the Rx descriptor has two restrictions:
602 	 * - Rx buffer address is 4 byte aligned.
603 	 * - Rx buffer begins with 2 byte headroom, and data will be put from
604 	 *   (buffer + 2).
605 	 * To satisfy this, specify the address to put back the buffer
606 	 * pointer advanced by AVE_FRAME_HEADROOM, and expand the map size
607 	 * by AVE_FRAME_HEADROOM.
608 	 */
609 	ret = ave_dma_map(ndev, &priv->rx.desc[entry],
610 			  skb->data - AVE_FRAME_HEADROOM,
611 			  AVE_MAX_ETHFRAME + AVE_FRAME_HEADROOM,
612 			  DMA_FROM_DEVICE, &paddr);
613 	if (ret) {
614 		netdev_err(ndev, "can't map skb for Rx\n");
615 		dev_kfree_skb_any(skb);
616 		return ret;
617 	}
618 	priv->rx.desc[entry].skbs = skb;
619 
620 	/* set buffer pointer */
621 	ave_desc_write_addr(ndev, AVE_DESCID_RX, entry, paddr);
622 
623 	/* set enable to cmdsts */
624 	ave_desc_write_cmdsts(ndev, AVE_DESCID_RX, entry,
625 			      AVE_STS_INTR | AVE_MAX_ETHFRAME);
626 
627 	return ret;
628 }
629 
630 /* Switch state of descriptor */
631 static int ave_desc_switch(struct net_device *ndev, enum desc_state state)
632 {
633 	struct ave_private *priv = netdev_priv(ndev);
634 	int ret = 0;
635 	u32 val;
636 
637 	switch (state) {
638 	case AVE_DESC_START:
639 		writel(AVE_DESCC_TD | AVE_DESCC_RD0, priv->base + AVE_DESCC);
640 		break;
641 
642 	case AVE_DESC_STOP:
643 		writel(0, priv->base + AVE_DESCC);
644 		if (readl_poll_timeout(priv->base + AVE_DESCC, val, !val,
645 				       150, 15000)) {
646 			netdev_err(ndev, "can't stop descriptor\n");
647 			ret = -EBUSY;
648 		}
649 		break;
650 
651 	case AVE_DESC_RX_SUSPEND:
652 		val = readl(priv->base + AVE_DESCC);
653 		val |= AVE_DESCC_RDSTP;
654 		val &= ~AVE_DESCC_STATUS_MASK;
655 		writel(val, priv->base + AVE_DESCC);
656 		if (readl_poll_timeout(priv->base + AVE_DESCC, val,
657 				       val & (AVE_DESCC_RDSTP << 16),
658 				       150, 150000)) {
659 			netdev_err(ndev, "can't suspend descriptor\n");
660 			ret = -EBUSY;
661 		}
662 		break;
663 
664 	case AVE_DESC_RX_PERMIT:
665 		val = readl(priv->base + AVE_DESCC);
666 		val &= ~AVE_DESCC_RDSTP;
667 		val &= ~AVE_DESCC_STATUS_MASK;
668 		writel(val, priv->base + AVE_DESCC);
669 		break;
670 
671 	default:
672 		ret = -EINVAL;
673 		break;
674 	}
675 
676 	return ret;
677 }
678 
679 static int ave_tx_complete(struct net_device *ndev)
680 {
681 	struct ave_private *priv = netdev_priv(ndev);
682 	u32 proc_idx, done_idx, ndesc, cmdsts;
683 	unsigned int nr_freebuf = 0;
684 	unsigned int tx_packets = 0;
685 	unsigned int tx_bytes = 0;
686 
687 	proc_idx = priv->tx.proc_idx;
688 	done_idx = priv->tx.done_idx;
689 	ndesc    = priv->tx.ndesc;
690 
691 	/* free pre-stored skb from done_idx to proc_idx */
692 	while (proc_idx != done_idx) {
693 		cmdsts = ave_desc_read_cmdsts(ndev, AVE_DESCID_TX, done_idx);
694 
695 		/* do nothing if owner is HW (==1 for Tx) */
696 		if (cmdsts & AVE_STS_OWN)
697 			break;
698 
699 		/* check Tx status and updates statistics */
700 		if (cmdsts & AVE_STS_OK) {
701 			tx_bytes += cmdsts & AVE_STS_PKTLEN_TX_MASK;
702 			/* success */
703 			if (cmdsts & AVE_STS_LAST)
704 				tx_packets++;
705 		} else {
706 			/* error */
707 			if (cmdsts & AVE_STS_LAST) {
708 				priv->stats_tx.errors++;
709 				if (cmdsts & (AVE_STS_OWC | AVE_STS_EC))
710 					priv->stats_tx.collisions++;
711 			}
712 		}
713 
714 		/* release skb */
715 		if (priv->tx.desc[done_idx].skbs) {
716 			ave_dma_unmap(ndev, &priv->tx.desc[done_idx],
717 				      DMA_TO_DEVICE);
718 			dev_consume_skb_any(priv->tx.desc[done_idx].skbs);
719 			priv->tx.desc[done_idx].skbs = NULL;
720 			nr_freebuf++;
721 		}
722 		done_idx = (done_idx + 1) % ndesc;
723 	}
724 
725 	priv->tx.done_idx = done_idx;
726 
727 	/* update stats */
728 	u64_stats_update_begin(&priv->stats_tx.syncp);
729 	priv->stats_tx.packets += tx_packets;
730 	priv->stats_tx.bytes   += tx_bytes;
731 	u64_stats_update_end(&priv->stats_tx.syncp);
732 
733 	/* wake queue for freeing buffer */
734 	if (unlikely(netif_queue_stopped(ndev)) && nr_freebuf)
735 		netif_wake_queue(ndev);
736 
737 	return nr_freebuf;
738 }
739 
740 static int ave_rx_receive(struct net_device *ndev, int num)
741 {
742 	struct ave_private *priv = netdev_priv(ndev);
743 	unsigned int rx_packets = 0;
744 	unsigned int rx_bytes = 0;
745 	u32 proc_idx, done_idx;
746 	struct sk_buff *skb;
747 	unsigned int pktlen;
748 	int restpkt, npkts;
749 	u32 ndesc, cmdsts;
750 
751 	proc_idx = priv->rx.proc_idx;
752 	done_idx = priv->rx.done_idx;
753 	ndesc    = priv->rx.ndesc;
754 	restpkt  = ((proc_idx + ndesc - 1) - done_idx) % ndesc;
755 
756 	for (npkts = 0; npkts < num; npkts++) {
757 		/* we can't receive more packet, so fill desc quickly */
758 		if (--restpkt < 0)
759 			break;
760 
761 		cmdsts = ave_desc_read_cmdsts(ndev, AVE_DESCID_RX, proc_idx);
762 
763 		/* do nothing if owner is HW (==0 for Rx) */
764 		if (!(cmdsts & AVE_STS_OWN))
765 			break;
766 
767 		if (!(cmdsts & AVE_STS_OK)) {
768 			priv->stats_rx.errors++;
769 			proc_idx = (proc_idx + 1) % ndesc;
770 			continue;
771 		}
772 
773 		pktlen = cmdsts & AVE_STS_PKTLEN_RX_MASK;
774 
775 		/* get skbuff for rx */
776 		skb = priv->rx.desc[proc_idx].skbs;
777 		priv->rx.desc[proc_idx].skbs = NULL;
778 
779 		ave_dma_unmap(ndev, &priv->rx.desc[proc_idx], DMA_FROM_DEVICE);
780 
781 		skb->dev = ndev;
782 		skb_put(skb, pktlen);
783 		skb->protocol = eth_type_trans(skb, ndev);
784 
785 		if ((cmdsts & AVE_STS_CSSV) && (!(cmdsts & AVE_STS_CSER)))
786 			skb->ip_summed = CHECKSUM_UNNECESSARY;
787 
788 		rx_packets++;
789 		rx_bytes += pktlen;
790 
791 		netif_receive_skb(skb);
792 
793 		proc_idx = (proc_idx + 1) % ndesc;
794 	}
795 
796 	priv->rx.proc_idx = proc_idx;
797 
798 	/* update stats */
799 	u64_stats_update_begin(&priv->stats_rx.syncp);
800 	priv->stats_rx.packets += rx_packets;
801 	priv->stats_rx.bytes   += rx_bytes;
802 	u64_stats_update_end(&priv->stats_rx.syncp);
803 
804 	/* refill the Rx buffers */
805 	while (proc_idx != done_idx) {
806 		if (ave_rxdesc_prepare(ndev, done_idx))
807 			break;
808 		done_idx = (done_idx + 1) % ndesc;
809 	}
810 
811 	priv->rx.done_idx = done_idx;
812 
813 	return npkts;
814 }
815 
816 static int ave_napi_poll_rx(struct napi_struct *napi, int budget)
817 {
818 	struct ave_private *priv;
819 	struct net_device *ndev;
820 	int num;
821 
822 	priv = container_of(napi, struct ave_private, napi_rx);
823 	ndev = priv->ndev;
824 
825 	num = ave_rx_receive(ndev, budget);
826 	if (num < budget) {
827 		napi_complete_done(napi, num);
828 
829 		/* enable Rx interrupt when NAPI finishes */
830 		ave_irq_enable(ndev, AVE_GI_RXIINT);
831 	}
832 
833 	return num;
834 }
835 
836 static int ave_napi_poll_tx(struct napi_struct *napi, int budget)
837 {
838 	struct ave_private *priv;
839 	struct net_device *ndev;
840 	int num;
841 
842 	priv = container_of(napi, struct ave_private, napi_tx);
843 	ndev = priv->ndev;
844 
845 	num = ave_tx_complete(ndev);
846 	napi_complete(napi);
847 
848 	/* enable Tx interrupt when NAPI finishes */
849 	ave_irq_enable(ndev, AVE_GI_TX);
850 
851 	return num;
852 }
853 
854 static void ave_global_reset(struct net_device *ndev)
855 {
856 	struct ave_private *priv = netdev_priv(ndev);
857 	u32 val;
858 
859 	/* set config register */
860 	val = AVE_CFGR_FLE | AVE_CFGR_IPFCEN | AVE_CFGR_CHE;
861 	if (!phy_interface_mode_is_rgmii(priv->phy_mode))
862 		val |= AVE_CFGR_MII;
863 	writel(val, priv->base + AVE_CFGR);
864 
865 	/* reset RMII register */
866 	val = readl(priv->base + AVE_RSTCTRL);
867 	val &= ~AVE_RSTCTRL_RMIIRST;
868 	writel(val, priv->base + AVE_RSTCTRL);
869 
870 	/* assert reset */
871 	writel(AVE_GRR_GRST | AVE_GRR_PHYRST, priv->base + AVE_GRR);
872 	msleep(20);
873 
874 	/* 1st, negate PHY reset only */
875 	writel(AVE_GRR_GRST, priv->base + AVE_GRR);
876 	msleep(40);
877 
878 	/* negate reset */
879 	writel(0, priv->base + AVE_GRR);
880 	msleep(40);
881 
882 	/* negate RMII register */
883 	val = readl(priv->base + AVE_RSTCTRL);
884 	val |= AVE_RSTCTRL_RMIIRST;
885 	writel(val, priv->base + AVE_RSTCTRL);
886 
887 	ave_irq_disable_all(ndev);
888 }
889 
890 static void ave_rxfifo_reset(struct net_device *ndev)
891 {
892 	struct ave_private *priv = netdev_priv(ndev);
893 	u32 rxcr_org;
894 
895 	/* save and disable MAC receive op */
896 	rxcr_org = readl(priv->base + AVE_RXCR);
897 	writel(rxcr_org & (~AVE_RXCR_RXEN), priv->base + AVE_RXCR);
898 
899 	/* suspend Rx descriptor */
900 	ave_desc_switch(ndev, AVE_DESC_RX_SUSPEND);
901 
902 	/* receive all packets before descriptor starts */
903 	ave_rx_receive(ndev, priv->rx.ndesc);
904 
905 	/* assert reset */
906 	writel(AVE_GRR_RXFFR, priv->base + AVE_GRR);
907 	udelay(50);
908 
909 	/* negate reset */
910 	writel(0, priv->base + AVE_GRR);
911 	udelay(20);
912 
913 	/* negate interrupt status */
914 	writel(AVE_GI_RXOVF, priv->base + AVE_GISR);
915 
916 	/* permit descriptor */
917 	ave_desc_switch(ndev, AVE_DESC_RX_PERMIT);
918 
919 	/* restore MAC reccieve op */
920 	writel(rxcr_org, priv->base + AVE_RXCR);
921 }
922 
923 static irqreturn_t ave_irq_handler(int irq, void *netdev)
924 {
925 	struct net_device *ndev = (struct net_device *)netdev;
926 	struct ave_private *priv = netdev_priv(ndev);
927 	u32 gimr_val, gisr_val;
928 
929 	gimr_val = ave_irq_disable_all(ndev);
930 
931 	/* get interrupt status */
932 	gisr_val = readl(priv->base + AVE_GISR);
933 
934 	/* PHY */
935 	if (gisr_val & AVE_GI_PHY)
936 		writel(AVE_GI_PHY, priv->base + AVE_GISR);
937 
938 	/* check exceeding packet */
939 	if (gisr_val & AVE_GI_RXERR) {
940 		writel(AVE_GI_RXERR, priv->base + AVE_GISR);
941 		netdev_err(ndev, "receive a packet exceeding frame buffer\n");
942 	}
943 
944 	gisr_val &= gimr_val;
945 	if (!gisr_val)
946 		goto exit_isr;
947 
948 	/* RxFIFO overflow */
949 	if (gisr_val & AVE_GI_RXOVF) {
950 		priv->stats_rx.fifo_errors++;
951 		ave_rxfifo_reset(ndev);
952 		goto exit_isr;
953 	}
954 
955 	/* Rx drop */
956 	if (gisr_val & AVE_GI_RXDROP) {
957 		priv->stats_rx.dropped++;
958 		writel(AVE_GI_RXDROP, priv->base + AVE_GISR);
959 	}
960 
961 	/* Rx interval */
962 	if (gisr_val & AVE_GI_RXIINT) {
963 		napi_schedule(&priv->napi_rx);
964 		/* still force to disable Rx interrupt until NAPI finishes */
965 		gimr_val &= ~AVE_GI_RXIINT;
966 	}
967 
968 	/* Tx completed */
969 	if (gisr_val & AVE_GI_TX) {
970 		napi_schedule(&priv->napi_tx);
971 		/* still force to disable Tx interrupt until NAPI finishes */
972 		gimr_val &= ~AVE_GI_TX;
973 	}
974 
975 exit_isr:
976 	ave_irq_restore(ndev, gimr_val);
977 
978 	return IRQ_HANDLED;
979 }
980 
981 static int ave_pfsel_start(struct net_device *ndev, unsigned int entry)
982 {
983 	struct ave_private *priv = netdev_priv(ndev);
984 	u32 val;
985 
986 	if (WARN_ON(entry > AVE_PF_SIZE))
987 		return -EINVAL;
988 
989 	val = readl(priv->base + AVE_PFEN);
990 	writel(val | BIT(entry), priv->base + AVE_PFEN);
991 
992 	return 0;
993 }
994 
995 static int ave_pfsel_stop(struct net_device *ndev, unsigned int entry)
996 {
997 	struct ave_private *priv = netdev_priv(ndev);
998 	u32 val;
999 
1000 	if (WARN_ON(entry > AVE_PF_SIZE))
1001 		return -EINVAL;
1002 
1003 	val = readl(priv->base + AVE_PFEN);
1004 	writel(val & ~BIT(entry), priv->base + AVE_PFEN);
1005 
1006 	return 0;
1007 }
1008 
1009 static int ave_pfsel_set_macaddr(struct net_device *ndev,
1010 				 unsigned int entry,
1011 				 const unsigned char *mac_addr,
1012 				 unsigned int set_size)
1013 {
1014 	struct ave_private *priv = netdev_priv(ndev);
1015 
1016 	if (WARN_ON(entry > AVE_PF_SIZE))
1017 		return -EINVAL;
1018 	if (WARN_ON(set_size > 6))
1019 		return -EINVAL;
1020 
1021 	ave_pfsel_stop(ndev, entry);
1022 
1023 	/* set MAC address for the filter */
1024 	ave_hw_write_macaddr(ndev, mac_addr,
1025 			     AVE_PKTF(entry), AVE_PKTF(entry) + 4);
1026 
1027 	/* set byte mask */
1028 	writel(GENMASK(31, set_size) & AVE_PFMBYTE_MASK0,
1029 	       priv->base + AVE_PFMBYTE(entry));
1030 	writel(AVE_PFMBYTE_MASK1, priv->base + AVE_PFMBYTE(entry) + 4);
1031 
1032 	/* set bit mask filter */
1033 	writel(AVE_PFMBIT_MASK, priv->base + AVE_PFMBIT(entry));
1034 
1035 	/* set selector to ring 0 */
1036 	writel(0, priv->base + AVE_PFSEL(entry));
1037 
1038 	/* restart filter */
1039 	ave_pfsel_start(ndev, entry);
1040 
1041 	return 0;
1042 }
1043 
1044 static void ave_pfsel_set_promisc(struct net_device *ndev,
1045 				  unsigned int entry, u32 rxring)
1046 {
1047 	struct ave_private *priv = netdev_priv(ndev);
1048 
1049 	if (WARN_ON(entry > AVE_PF_SIZE))
1050 		return;
1051 
1052 	ave_pfsel_stop(ndev, entry);
1053 
1054 	/* set byte mask */
1055 	writel(AVE_PFMBYTE_MASK0, priv->base + AVE_PFMBYTE(entry));
1056 	writel(AVE_PFMBYTE_MASK1, priv->base + AVE_PFMBYTE(entry) + 4);
1057 
1058 	/* set bit mask filter */
1059 	writel(AVE_PFMBIT_MASK, priv->base + AVE_PFMBIT(entry));
1060 
1061 	/* set selector to rxring */
1062 	writel(rxring, priv->base + AVE_PFSEL(entry));
1063 
1064 	ave_pfsel_start(ndev, entry);
1065 }
1066 
1067 static void ave_pfsel_init(struct net_device *ndev)
1068 {
1069 	unsigned char bcast_mac[ETH_ALEN];
1070 	int i;
1071 
1072 	eth_broadcast_addr(bcast_mac);
1073 
1074 	for (i = 0; i < AVE_PF_SIZE; i++)
1075 		ave_pfsel_stop(ndev, i);
1076 
1077 	/* promiscious entry, select ring 0 */
1078 	ave_pfsel_set_promisc(ndev, AVE_PFNUM_FILTER, 0);
1079 
1080 	/* unicast entry */
1081 	ave_pfsel_set_macaddr(ndev, AVE_PFNUM_UNICAST, ndev->dev_addr, 6);
1082 
1083 	/* broadcast entry */
1084 	ave_pfsel_set_macaddr(ndev, AVE_PFNUM_BROADCAST, bcast_mac, 6);
1085 }
1086 
1087 static void ave_phy_adjust_link(struct net_device *ndev)
1088 {
1089 	struct ave_private *priv = netdev_priv(ndev);
1090 	struct phy_device *phydev = ndev->phydev;
1091 	u32 val, txcr, rxcr, rxcr_org;
1092 	u16 rmt_adv = 0, lcl_adv = 0;
1093 	u8 cap;
1094 
1095 	/* set RGMII speed */
1096 	val = readl(priv->base + AVE_TXCR);
1097 	val &= ~(AVE_TXCR_TXSPD_100 | AVE_TXCR_TXSPD_1G);
1098 
1099 	if (phy_interface_is_rgmii(phydev) && phydev->speed == SPEED_1000)
1100 		val |= AVE_TXCR_TXSPD_1G;
1101 	else if (phydev->speed == SPEED_100)
1102 		val |= AVE_TXCR_TXSPD_100;
1103 
1104 	writel(val, priv->base + AVE_TXCR);
1105 
1106 	/* set RMII speed (100M/10M only) */
1107 	if (!phy_interface_is_rgmii(phydev)) {
1108 		val = readl(priv->base + AVE_LINKSEL);
1109 		if (phydev->speed == SPEED_10)
1110 			val &= ~AVE_LINKSEL_100M;
1111 		else
1112 			val |= AVE_LINKSEL_100M;
1113 		writel(val, priv->base + AVE_LINKSEL);
1114 	}
1115 
1116 	/* check current RXCR/TXCR */
1117 	rxcr = readl(priv->base + AVE_RXCR);
1118 	txcr = readl(priv->base + AVE_TXCR);
1119 	rxcr_org = rxcr;
1120 
1121 	if (phydev->duplex) {
1122 		rxcr |= AVE_RXCR_FDUPEN;
1123 
1124 		if (phydev->pause)
1125 			rmt_adv |= LPA_PAUSE_CAP;
1126 		if (phydev->asym_pause)
1127 			rmt_adv |= LPA_PAUSE_ASYM;
1128 
1129 		lcl_adv = linkmode_adv_to_lcl_adv_t(phydev->advertising);
1130 		cap = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv);
1131 		if (cap & FLOW_CTRL_TX)
1132 			txcr |= AVE_TXCR_FLOCTR;
1133 		else
1134 			txcr &= ~AVE_TXCR_FLOCTR;
1135 		if (cap & FLOW_CTRL_RX)
1136 			rxcr |= AVE_RXCR_FLOCTR;
1137 		else
1138 			rxcr &= ~AVE_RXCR_FLOCTR;
1139 	} else {
1140 		rxcr &= ~AVE_RXCR_FDUPEN;
1141 		rxcr &= ~AVE_RXCR_FLOCTR;
1142 		txcr &= ~AVE_TXCR_FLOCTR;
1143 	}
1144 
1145 	if (rxcr_org != rxcr) {
1146 		/* disable Rx mac */
1147 		writel(rxcr & ~AVE_RXCR_RXEN, priv->base + AVE_RXCR);
1148 		/* change and enable TX/Rx mac */
1149 		writel(txcr, priv->base + AVE_TXCR);
1150 		writel(rxcr, priv->base + AVE_RXCR);
1151 	}
1152 
1153 	phy_print_status(phydev);
1154 }
1155 
1156 static void ave_macaddr_init(struct net_device *ndev)
1157 {
1158 	ave_hw_write_macaddr(ndev, ndev->dev_addr, AVE_RXMAC1R, AVE_RXMAC2R);
1159 
1160 	/* pfsel unicast entry */
1161 	ave_pfsel_set_macaddr(ndev, AVE_PFNUM_UNICAST, ndev->dev_addr, 6);
1162 }
1163 
1164 static int ave_init(struct net_device *ndev)
1165 {
1166 	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1167 	struct ave_private *priv = netdev_priv(ndev);
1168 	struct device *dev = ndev->dev.parent;
1169 	struct device_node *np = dev->of_node;
1170 	struct device_node *mdio_np;
1171 	struct phy_device *phydev;
1172 	int nc, nr, ret;
1173 
1174 	/* enable clk because of hw access until ndo_open */
1175 	for (nc = 0; nc < priv->nclks; nc++) {
1176 		ret = clk_prepare_enable(priv->clk[nc]);
1177 		if (ret) {
1178 			dev_err(dev, "can't enable clock\n");
1179 			goto out_clk_disable;
1180 		}
1181 	}
1182 
1183 	for (nr = 0; nr < priv->nrsts; nr++) {
1184 		ret = reset_control_deassert(priv->rst[nr]);
1185 		if (ret) {
1186 			dev_err(dev, "can't deassert reset\n");
1187 			goto out_reset_assert;
1188 		}
1189 	}
1190 
1191 	ret = regmap_update_bits(priv->regmap, SG_ETPINMODE,
1192 				 priv->pinmode_mask, priv->pinmode_val);
1193 	if (ret)
1194 		goto out_reset_assert;
1195 
1196 	ave_global_reset(ndev);
1197 
1198 	mdio_np = of_get_child_by_name(np, "mdio");
1199 	if (!mdio_np) {
1200 		dev_err(dev, "mdio node not found\n");
1201 		ret = -EINVAL;
1202 		goto out_reset_assert;
1203 	}
1204 	ret = of_mdiobus_register(priv->mdio, mdio_np);
1205 	of_node_put(mdio_np);
1206 	if (ret) {
1207 		dev_err(dev, "failed to register mdiobus\n");
1208 		goto out_reset_assert;
1209 	}
1210 
1211 	phydev = of_phy_get_and_connect(ndev, np, ave_phy_adjust_link);
1212 	if (!phydev) {
1213 		dev_err(dev, "could not attach to PHY\n");
1214 		ret = -ENODEV;
1215 		goto out_mdio_unregister;
1216 	}
1217 
1218 	priv->phydev = phydev;
1219 
1220 	ave_ethtool_get_wol(ndev, &wol);
1221 	device_set_wakeup_capable(&ndev->dev, !!wol.supported);
1222 
1223 	/* set wol initial state disabled */
1224 	wol.wolopts = 0;
1225 	__ave_ethtool_set_wol(ndev, &wol);
1226 
1227 	if (!phy_interface_is_rgmii(phydev))
1228 		phy_set_max_speed(phydev, SPEED_100);
1229 
1230 	phy_support_asym_pause(phydev);
1231 
1232 	phy_attached_info(phydev);
1233 
1234 	return 0;
1235 
1236 out_mdio_unregister:
1237 	mdiobus_unregister(priv->mdio);
1238 out_reset_assert:
1239 	while (--nr >= 0)
1240 		reset_control_assert(priv->rst[nr]);
1241 out_clk_disable:
1242 	while (--nc >= 0)
1243 		clk_disable_unprepare(priv->clk[nc]);
1244 
1245 	return ret;
1246 }
1247 
1248 static void ave_uninit(struct net_device *ndev)
1249 {
1250 	struct ave_private *priv = netdev_priv(ndev);
1251 	int i;
1252 
1253 	phy_disconnect(priv->phydev);
1254 	mdiobus_unregister(priv->mdio);
1255 
1256 	/* disable clk because of hw access after ndo_stop */
1257 	for (i = 0; i < priv->nrsts; i++)
1258 		reset_control_assert(priv->rst[i]);
1259 	for (i = 0; i < priv->nclks; i++)
1260 		clk_disable_unprepare(priv->clk[i]);
1261 }
1262 
1263 static int ave_open(struct net_device *ndev)
1264 {
1265 	struct ave_private *priv = netdev_priv(ndev);
1266 	int entry;
1267 	int ret;
1268 	u32 val;
1269 
1270 	ret = request_irq(priv->irq, ave_irq_handler, IRQF_SHARED, ndev->name,
1271 			  ndev);
1272 	if (ret)
1273 		return ret;
1274 
1275 	priv->tx.desc = kcalloc(priv->tx.ndesc, sizeof(*priv->tx.desc),
1276 				GFP_KERNEL);
1277 	if (!priv->tx.desc) {
1278 		ret = -ENOMEM;
1279 		goto out_free_irq;
1280 	}
1281 
1282 	priv->rx.desc = kcalloc(priv->rx.ndesc, sizeof(*priv->rx.desc),
1283 				GFP_KERNEL);
1284 	if (!priv->rx.desc) {
1285 		kfree(priv->tx.desc);
1286 		ret = -ENOMEM;
1287 		goto out_free_irq;
1288 	}
1289 
1290 	/* initialize Tx work and descriptor */
1291 	priv->tx.proc_idx = 0;
1292 	priv->tx.done_idx = 0;
1293 	for (entry = 0; entry < priv->tx.ndesc; entry++) {
1294 		ave_desc_write_cmdsts(ndev, AVE_DESCID_TX, entry, 0);
1295 		ave_desc_write_addr(ndev, AVE_DESCID_TX, entry, 0);
1296 	}
1297 	writel(AVE_TXDC_ADDR_START |
1298 	       (((priv->tx.ndesc * priv->desc_size) << 16) & AVE_TXDC_SIZE),
1299 	       priv->base + AVE_TXDC);
1300 
1301 	/* initialize Rx work and descriptor */
1302 	priv->rx.proc_idx = 0;
1303 	priv->rx.done_idx = 0;
1304 	for (entry = 0; entry < priv->rx.ndesc; entry++) {
1305 		if (ave_rxdesc_prepare(ndev, entry))
1306 			break;
1307 	}
1308 	writel(AVE_RXDC0_ADDR_START |
1309 	       (((priv->rx.ndesc * priv->desc_size) << 16) & AVE_RXDC0_SIZE),
1310 	       priv->base + AVE_RXDC0);
1311 
1312 	ave_desc_switch(ndev, AVE_DESC_START);
1313 
1314 	ave_pfsel_init(ndev);
1315 	ave_macaddr_init(ndev);
1316 
1317 	/* set Rx configuration */
1318 	/* full duplex, enable pause drop, enalbe flow control */
1319 	val = AVE_RXCR_RXEN | AVE_RXCR_FDUPEN | AVE_RXCR_DRPEN |
1320 		AVE_RXCR_FLOCTR | (AVE_MAX_ETHFRAME & AVE_RXCR_MPSIZ_MASK);
1321 	writel(val, priv->base + AVE_RXCR);
1322 
1323 	/* set Tx configuration */
1324 	/* enable flow control, disable loopback */
1325 	writel(AVE_TXCR_FLOCTR, priv->base + AVE_TXCR);
1326 
1327 	/* enable timer, clear EN,INTM, and mask interval unit(BSCK) */
1328 	val = readl(priv->base + AVE_IIRQC) & AVE_IIRQC_BSCK;
1329 	val |= AVE_IIRQC_EN0 | (AVE_INTM_COUNT << 16);
1330 	writel(val, priv->base + AVE_IIRQC);
1331 
1332 	val = AVE_GI_RXIINT | AVE_GI_RXOVF | AVE_GI_TX | AVE_GI_RXDROP;
1333 	ave_irq_restore(ndev, val);
1334 
1335 	napi_enable(&priv->napi_rx);
1336 	napi_enable(&priv->napi_tx);
1337 
1338 	phy_start(ndev->phydev);
1339 	phy_start_aneg(ndev->phydev);
1340 	netif_start_queue(ndev);
1341 
1342 	return 0;
1343 
1344 out_free_irq:
1345 	disable_irq(priv->irq);
1346 	free_irq(priv->irq, ndev);
1347 
1348 	return ret;
1349 }
1350 
1351 static int ave_stop(struct net_device *ndev)
1352 {
1353 	struct ave_private *priv = netdev_priv(ndev);
1354 	int entry;
1355 
1356 	ave_irq_disable_all(ndev);
1357 	disable_irq(priv->irq);
1358 	free_irq(priv->irq, ndev);
1359 
1360 	netif_tx_disable(ndev);
1361 	phy_stop(ndev->phydev);
1362 	napi_disable(&priv->napi_tx);
1363 	napi_disable(&priv->napi_rx);
1364 
1365 	ave_desc_switch(ndev, AVE_DESC_STOP);
1366 
1367 	/* free Tx buffer */
1368 	for (entry = 0; entry < priv->tx.ndesc; entry++) {
1369 		if (!priv->tx.desc[entry].skbs)
1370 			continue;
1371 
1372 		ave_dma_unmap(ndev, &priv->tx.desc[entry], DMA_TO_DEVICE);
1373 		dev_kfree_skb_any(priv->tx.desc[entry].skbs);
1374 		priv->tx.desc[entry].skbs = NULL;
1375 	}
1376 	priv->tx.proc_idx = 0;
1377 	priv->tx.done_idx = 0;
1378 
1379 	/* free Rx buffer */
1380 	for (entry = 0; entry < priv->rx.ndesc; entry++) {
1381 		if (!priv->rx.desc[entry].skbs)
1382 			continue;
1383 
1384 		ave_dma_unmap(ndev, &priv->rx.desc[entry], DMA_FROM_DEVICE);
1385 		dev_kfree_skb_any(priv->rx.desc[entry].skbs);
1386 		priv->rx.desc[entry].skbs = NULL;
1387 	}
1388 	priv->rx.proc_idx = 0;
1389 	priv->rx.done_idx = 0;
1390 
1391 	kfree(priv->tx.desc);
1392 	kfree(priv->rx.desc);
1393 
1394 	return 0;
1395 }
1396 
1397 static netdev_tx_t ave_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1398 {
1399 	struct ave_private *priv = netdev_priv(ndev);
1400 	u32 proc_idx, done_idx, ndesc, cmdsts;
1401 	int ret, freepkt;
1402 	dma_addr_t paddr;
1403 
1404 	proc_idx = priv->tx.proc_idx;
1405 	done_idx = priv->tx.done_idx;
1406 	ndesc = priv->tx.ndesc;
1407 	freepkt = ((done_idx + ndesc - 1) - proc_idx) % ndesc;
1408 
1409 	/* stop queue when not enough entry */
1410 	if (unlikely(freepkt < 1)) {
1411 		netif_stop_queue(ndev);
1412 		return NETDEV_TX_BUSY;
1413 	}
1414 
1415 	/* add padding for short packet */
1416 	if (skb_put_padto(skb, ETH_ZLEN)) {
1417 		priv->stats_tx.dropped++;
1418 		return NETDEV_TX_OK;
1419 	}
1420 
1421 	/* map Tx buffer
1422 	 * Tx buffer set to the Tx descriptor doesn't have any restriction.
1423 	 */
1424 	ret = ave_dma_map(ndev, &priv->tx.desc[proc_idx],
1425 			  skb->data, skb->len, DMA_TO_DEVICE, &paddr);
1426 	if (ret) {
1427 		dev_kfree_skb_any(skb);
1428 		priv->stats_tx.dropped++;
1429 		return NETDEV_TX_OK;
1430 	}
1431 
1432 	priv->tx.desc[proc_idx].skbs = skb;
1433 
1434 	ave_desc_write_addr(ndev, AVE_DESCID_TX, proc_idx, paddr);
1435 
1436 	cmdsts = AVE_STS_OWN | AVE_STS_1ST | AVE_STS_LAST |
1437 		(skb->len & AVE_STS_PKTLEN_TX_MASK);
1438 
1439 	/* set interrupt per AVE_FORCE_TXINTCNT or when queue is stopped */
1440 	if (!(proc_idx % AVE_FORCE_TXINTCNT) || netif_queue_stopped(ndev))
1441 		cmdsts |= AVE_STS_INTR;
1442 
1443 	/* disable checksum calculation when skb doesn't calurate checksum */
1444 	if (skb->ip_summed == CHECKSUM_NONE ||
1445 	    skb->ip_summed == CHECKSUM_UNNECESSARY)
1446 		cmdsts |= AVE_STS_NOCSUM;
1447 
1448 	ave_desc_write_cmdsts(ndev, AVE_DESCID_TX, proc_idx, cmdsts);
1449 
1450 	priv->tx.proc_idx = (proc_idx + 1) % ndesc;
1451 
1452 	return NETDEV_TX_OK;
1453 }
1454 
1455 static int ave_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
1456 {
1457 	return phy_mii_ioctl(ndev->phydev, ifr, cmd);
1458 }
1459 
1460 static const u8 v4multi_macadr[] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00 };
1461 static const u8 v6multi_macadr[] = { 0x33, 0x00, 0x00, 0x00, 0x00, 0x00 };
1462 
1463 static void ave_set_rx_mode(struct net_device *ndev)
1464 {
1465 	struct ave_private *priv = netdev_priv(ndev);
1466 	struct netdev_hw_addr *hw_adr;
1467 	int count, mc_cnt;
1468 	u32 val;
1469 
1470 	/* MAC addr filter enable for promiscious mode */
1471 	mc_cnt = netdev_mc_count(ndev);
1472 	val = readl(priv->base + AVE_RXCR);
1473 	if (ndev->flags & IFF_PROMISC || !mc_cnt)
1474 		val &= ~AVE_RXCR_AFEN;
1475 	else
1476 		val |= AVE_RXCR_AFEN;
1477 	writel(val, priv->base + AVE_RXCR);
1478 
1479 	/* set all multicast address */
1480 	if ((ndev->flags & IFF_ALLMULTI) || mc_cnt > AVE_PF_MULTICAST_SIZE) {
1481 		ave_pfsel_set_macaddr(ndev, AVE_PFNUM_MULTICAST,
1482 				      v4multi_macadr, 1);
1483 		ave_pfsel_set_macaddr(ndev, AVE_PFNUM_MULTICAST + 1,
1484 				      v6multi_macadr, 1);
1485 	} else {
1486 		/* stop all multicast filter */
1487 		for (count = 0; count < AVE_PF_MULTICAST_SIZE; count++)
1488 			ave_pfsel_stop(ndev, AVE_PFNUM_MULTICAST + count);
1489 
1490 		/* set multicast addresses */
1491 		count = 0;
1492 		netdev_for_each_mc_addr(hw_adr, ndev) {
1493 			if (count == mc_cnt)
1494 				break;
1495 			ave_pfsel_set_macaddr(ndev, AVE_PFNUM_MULTICAST + count,
1496 					      hw_adr->addr, 6);
1497 			count++;
1498 		}
1499 	}
1500 }
1501 
1502 static void ave_get_stats64(struct net_device *ndev,
1503 			    struct rtnl_link_stats64 *stats)
1504 {
1505 	struct ave_private *priv = netdev_priv(ndev);
1506 	unsigned int start;
1507 
1508 	do {
1509 		start = u64_stats_fetch_begin_irq(&priv->stats_rx.syncp);
1510 		stats->rx_packets = priv->stats_rx.packets;
1511 		stats->rx_bytes	  = priv->stats_rx.bytes;
1512 	} while (u64_stats_fetch_retry_irq(&priv->stats_rx.syncp, start));
1513 
1514 	do {
1515 		start = u64_stats_fetch_begin_irq(&priv->stats_tx.syncp);
1516 		stats->tx_packets = priv->stats_tx.packets;
1517 		stats->tx_bytes	  = priv->stats_tx.bytes;
1518 	} while (u64_stats_fetch_retry_irq(&priv->stats_tx.syncp, start));
1519 
1520 	stats->rx_errors      = priv->stats_rx.errors;
1521 	stats->tx_errors      = priv->stats_tx.errors;
1522 	stats->rx_dropped     = priv->stats_rx.dropped;
1523 	stats->tx_dropped     = priv->stats_tx.dropped;
1524 	stats->rx_fifo_errors = priv->stats_rx.fifo_errors;
1525 	stats->collisions     = priv->stats_tx.collisions;
1526 }
1527 
1528 static int ave_set_mac_address(struct net_device *ndev, void *p)
1529 {
1530 	int ret = eth_mac_addr(ndev, p);
1531 
1532 	if (ret)
1533 		return ret;
1534 
1535 	ave_macaddr_init(ndev);
1536 
1537 	return 0;
1538 }
1539 
1540 static const struct net_device_ops ave_netdev_ops = {
1541 	.ndo_init		= ave_init,
1542 	.ndo_uninit		= ave_uninit,
1543 	.ndo_open		= ave_open,
1544 	.ndo_stop		= ave_stop,
1545 	.ndo_start_xmit		= ave_start_xmit,
1546 	.ndo_do_ioctl		= ave_ioctl,
1547 	.ndo_set_rx_mode	= ave_set_rx_mode,
1548 	.ndo_get_stats64	= ave_get_stats64,
1549 	.ndo_set_mac_address	= ave_set_mac_address,
1550 };
1551 
1552 static int ave_probe(struct platform_device *pdev)
1553 {
1554 	const struct ave_soc_data *data;
1555 	struct device *dev = &pdev->dev;
1556 	char buf[ETHTOOL_FWVERS_LEN];
1557 	struct of_phandle_args args;
1558 	phy_interface_t phy_mode;
1559 	struct ave_private *priv;
1560 	struct net_device *ndev;
1561 	struct device_node *np;
1562 	const void *mac_addr;
1563 	void __iomem *base;
1564 	const char *name;
1565 	int i, irq, ret;
1566 	u64 dma_mask;
1567 	u32 ave_id;
1568 
1569 	data = of_device_get_match_data(dev);
1570 	if (WARN_ON(!data))
1571 		return -EINVAL;
1572 
1573 	np = dev->of_node;
1574 	ret = of_get_phy_mode(np, &phy_mode);
1575 	if (ret) {
1576 		dev_err(dev, "phy-mode not found\n");
1577 		return ret;
1578 	}
1579 
1580 	irq = platform_get_irq(pdev, 0);
1581 	if (irq < 0)
1582 		return irq;
1583 
1584 	base = devm_platform_ioremap_resource(pdev, 0);
1585 	if (IS_ERR(base))
1586 		return PTR_ERR(base);
1587 
1588 	ndev = alloc_etherdev(sizeof(struct ave_private));
1589 	if (!ndev) {
1590 		dev_err(dev, "can't allocate ethernet device\n");
1591 		return -ENOMEM;
1592 	}
1593 
1594 	ndev->netdev_ops = &ave_netdev_ops;
1595 	ndev->ethtool_ops = &ave_ethtool_ops;
1596 	SET_NETDEV_DEV(ndev, dev);
1597 
1598 	ndev->features    |= (NETIF_F_IP_CSUM | NETIF_F_RXCSUM);
1599 	ndev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_RXCSUM);
1600 
1601 	ndev->max_mtu = AVE_MAX_ETHFRAME - (ETH_HLEN + ETH_FCS_LEN);
1602 
1603 	mac_addr = of_get_mac_address(np);
1604 	if (!IS_ERR(mac_addr))
1605 		ether_addr_copy(ndev->dev_addr, mac_addr);
1606 
1607 	/* if the mac address is invalid, use random mac address */
1608 	if (!is_valid_ether_addr(ndev->dev_addr)) {
1609 		eth_hw_addr_random(ndev);
1610 		dev_warn(dev, "Using random MAC address: %pM\n",
1611 			 ndev->dev_addr);
1612 	}
1613 
1614 	priv = netdev_priv(ndev);
1615 	priv->base = base;
1616 	priv->irq = irq;
1617 	priv->ndev = ndev;
1618 	priv->msg_enable = netif_msg_init(-1, AVE_DEFAULT_MSG_ENABLE);
1619 	priv->phy_mode = phy_mode;
1620 	priv->data = data;
1621 
1622 	if (IS_DESC_64BIT(priv)) {
1623 		priv->desc_size = AVE_DESC_SIZE_64;
1624 		priv->tx.daddr  = AVE_TXDM_64;
1625 		priv->rx.daddr  = AVE_RXDM_64;
1626 		dma_mask = DMA_BIT_MASK(64);
1627 	} else {
1628 		priv->desc_size = AVE_DESC_SIZE_32;
1629 		priv->tx.daddr  = AVE_TXDM_32;
1630 		priv->rx.daddr  = AVE_RXDM_32;
1631 		dma_mask = DMA_BIT_MASK(32);
1632 	}
1633 	ret = dma_set_mask(dev, dma_mask);
1634 	if (ret)
1635 		goto out_free_netdev;
1636 
1637 	priv->tx.ndesc = AVE_NR_TXDESC;
1638 	priv->rx.ndesc = AVE_NR_RXDESC;
1639 
1640 	u64_stats_init(&priv->stats_tx.syncp);
1641 	u64_stats_init(&priv->stats_rx.syncp);
1642 
1643 	for (i = 0; i < AVE_MAX_CLKS; i++) {
1644 		name = priv->data->clock_names[i];
1645 		if (!name)
1646 			break;
1647 		priv->clk[i] = devm_clk_get(dev, name);
1648 		if (IS_ERR(priv->clk[i])) {
1649 			ret = PTR_ERR(priv->clk[i]);
1650 			goto out_free_netdev;
1651 		}
1652 		priv->nclks++;
1653 	}
1654 
1655 	for (i = 0; i < AVE_MAX_RSTS; i++) {
1656 		name = priv->data->reset_names[i];
1657 		if (!name)
1658 			break;
1659 		priv->rst[i] = devm_reset_control_get_shared(dev, name);
1660 		if (IS_ERR(priv->rst[i])) {
1661 			ret = PTR_ERR(priv->rst[i]);
1662 			goto out_free_netdev;
1663 		}
1664 		priv->nrsts++;
1665 	}
1666 
1667 	ret = of_parse_phandle_with_fixed_args(np,
1668 					       "socionext,syscon-phy-mode",
1669 					       1, 0, &args);
1670 	if (ret) {
1671 		dev_err(dev, "can't get syscon-phy-mode property\n");
1672 		goto out_free_netdev;
1673 	}
1674 	priv->regmap = syscon_node_to_regmap(args.np);
1675 	of_node_put(args.np);
1676 	if (IS_ERR(priv->regmap)) {
1677 		dev_err(dev, "can't map syscon-phy-mode\n");
1678 		ret = PTR_ERR(priv->regmap);
1679 		goto out_free_netdev;
1680 	}
1681 	ret = priv->data->get_pinmode(priv, phy_mode, args.args[0]);
1682 	if (ret) {
1683 		dev_err(dev, "invalid phy-mode setting\n");
1684 		goto out_free_netdev;
1685 	}
1686 
1687 	priv->mdio = devm_mdiobus_alloc(dev);
1688 	if (!priv->mdio) {
1689 		ret = -ENOMEM;
1690 		goto out_free_netdev;
1691 	}
1692 	priv->mdio->priv = ndev;
1693 	priv->mdio->parent = dev;
1694 	priv->mdio->read = ave_mdiobus_read;
1695 	priv->mdio->write = ave_mdiobus_write;
1696 	priv->mdio->name = "uniphier-mdio";
1697 	snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "%s-%x",
1698 		 pdev->name, pdev->id);
1699 
1700 	/* Register as a NAPI supported driver */
1701 	netif_napi_add(ndev, &priv->napi_rx, ave_napi_poll_rx,
1702 		       NAPI_POLL_WEIGHT);
1703 	netif_tx_napi_add(ndev, &priv->napi_tx, ave_napi_poll_tx,
1704 			  NAPI_POLL_WEIGHT);
1705 
1706 	platform_set_drvdata(pdev, ndev);
1707 
1708 	ret = register_netdev(ndev);
1709 	if (ret) {
1710 		dev_err(dev, "failed to register netdevice\n");
1711 		goto out_del_napi;
1712 	}
1713 
1714 	/* get ID and version */
1715 	ave_id = readl(priv->base + AVE_IDR);
1716 	ave_hw_read_version(ndev, buf, sizeof(buf));
1717 
1718 	dev_info(dev, "Socionext %c%c%c%c Ethernet IP %s (irq=%d, phy=%s)\n",
1719 		 (ave_id >> 24) & 0xff, (ave_id >> 16) & 0xff,
1720 		 (ave_id >> 8) & 0xff, (ave_id >> 0) & 0xff,
1721 		 buf, priv->irq, phy_modes(phy_mode));
1722 
1723 	return 0;
1724 
1725 out_del_napi:
1726 	netif_napi_del(&priv->napi_rx);
1727 	netif_napi_del(&priv->napi_tx);
1728 out_free_netdev:
1729 	free_netdev(ndev);
1730 
1731 	return ret;
1732 }
1733 
1734 static int ave_remove(struct platform_device *pdev)
1735 {
1736 	struct net_device *ndev = platform_get_drvdata(pdev);
1737 	struct ave_private *priv = netdev_priv(ndev);
1738 
1739 	unregister_netdev(ndev);
1740 	netif_napi_del(&priv->napi_rx);
1741 	netif_napi_del(&priv->napi_tx);
1742 	free_netdev(ndev);
1743 
1744 	return 0;
1745 }
1746 
1747 #ifdef CONFIG_PM_SLEEP
1748 static int ave_suspend(struct device *dev)
1749 {
1750 	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1751 	struct net_device *ndev = dev_get_drvdata(dev);
1752 	struct ave_private *priv = netdev_priv(ndev);
1753 	int ret = 0;
1754 
1755 	if (netif_running(ndev)) {
1756 		ret = ave_stop(ndev);
1757 		netif_device_detach(ndev);
1758 	}
1759 
1760 	ave_ethtool_get_wol(ndev, &wol);
1761 	priv->wolopts = wol.wolopts;
1762 
1763 	return ret;
1764 }
1765 
1766 static int ave_resume(struct device *dev)
1767 {
1768 	struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1769 	struct net_device *ndev = dev_get_drvdata(dev);
1770 	struct ave_private *priv = netdev_priv(ndev);
1771 	int ret = 0;
1772 
1773 	ave_global_reset(ndev);
1774 
1775 	ave_ethtool_get_wol(ndev, &wol);
1776 	wol.wolopts = priv->wolopts;
1777 	__ave_ethtool_set_wol(ndev, &wol);
1778 
1779 	if (ndev->phydev) {
1780 		ret = phy_resume(ndev->phydev);
1781 		if (ret)
1782 			return ret;
1783 	}
1784 
1785 	if (netif_running(ndev)) {
1786 		ret = ave_open(ndev);
1787 		netif_device_attach(ndev);
1788 	}
1789 
1790 	return ret;
1791 }
1792 
1793 static SIMPLE_DEV_PM_OPS(ave_pm_ops, ave_suspend, ave_resume);
1794 #define AVE_PM_OPS	(&ave_pm_ops)
1795 #else
1796 #define AVE_PM_OPS	NULL
1797 #endif
1798 
1799 static int ave_pro4_get_pinmode(struct ave_private *priv,
1800 				phy_interface_t phy_mode, u32 arg)
1801 {
1802 	if (arg > 0)
1803 		return -EINVAL;
1804 
1805 	priv->pinmode_mask = SG_ETPINMODE_RMII(0);
1806 
1807 	switch (phy_mode) {
1808 	case PHY_INTERFACE_MODE_RMII:
1809 		priv->pinmode_val = SG_ETPINMODE_RMII(0);
1810 		break;
1811 	case PHY_INTERFACE_MODE_MII:
1812 	case PHY_INTERFACE_MODE_RGMII:
1813 	case PHY_INTERFACE_MODE_RGMII_ID:
1814 	case PHY_INTERFACE_MODE_RGMII_RXID:
1815 	case PHY_INTERFACE_MODE_RGMII_TXID:
1816 		priv->pinmode_val = 0;
1817 		break;
1818 	default:
1819 		return -EINVAL;
1820 	}
1821 
1822 	return 0;
1823 }
1824 
1825 static int ave_ld11_get_pinmode(struct ave_private *priv,
1826 				phy_interface_t phy_mode, u32 arg)
1827 {
1828 	if (arg > 0)
1829 		return -EINVAL;
1830 
1831 	priv->pinmode_mask = SG_ETPINMODE_EXTPHY | SG_ETPINMODE_RMII(0);
1832 
1833 	switch (phy_mode) {
1834 	case PHY_INTERFACE_MODE_INTERNAL:
1835 		priv->pinmode_val = 0;
1836 		break;
1837 	case PHY_INTERFACE_MODE_RMII:
1838 		priv->pinmode_val = SG_ETPINMODE_EXTPHY | SG_ETPINMODE_RMII(0);
1839 		break;
1840 	default:
1841 		return -EINVAL;
1842 	}
1843 
1844 	return 0;
1845 }
1846 
1847 static int ave_ld20_get_pinmode(struct ave_private *priv,
1848 				phy_interface_t phy_mode, u32 arg)
1849 {
1850 	if (arg > 0)
1851 		return -EINVAL;
1852 
1853 	priv->pinmode_mask = SG_ETPINMODE_RMII(0);
1854 
1855 	switch (phy_mode) {
1856 	case PHY_INTERFACE_MODE_RMII:
1857 		priv->pinmode_val = SG_ETPINMODE_RMII(0);
1858 		break;
1859 	case PHY_INTERFACE_MODE_RGMII:
1860 	case PHY_INTERFACE_MODE_RGMII_ID:
1861 	case PHY_INTERFACE_MODE_RGMII_RXID:
1862 	case PHY_INTERFACE_MODE_RGMII_TXID:
1863 		priv->pinmode_val = 0;
1864 		break;
1865 	default:
1866 		return -EINVAL;
1867 	}
1868 
1869 	return 0;
1870 }
1871 
1872 static int ave_pxs3_get_pinmode(struct ave_private *priv,
1873 				phy_interface_t phy_mode, u32 arg)
1874 {
1875 	if (arg > 1)
1876 		return -EINVAL;
1877 
1878 	priv->pinmode_mask = SG_ETPINMODE_RMII(arg);
1879 
1880 	switch (phy_mode) {
1881 	case PHY_INTERFACE_MODE_RMII:
1882 		priv->pinmode_val = SG_ETPINMODE_RMII(arg);
1883 		break;
1884 	case PHY_INTERFACE_MODE_RGMII:
1885 	case PHY_INTERFACE_MODE_RGMII_ID:
1886 	case PHY_INTERFACE_MODE_RGMII_RXID:
1887 	case PHY_INTERFACE_MODE_RGMII_TXID:
1888 		priv->pinmode_val = 0;
1889 		break;
1890 	default:
1891 		return -EINVAL;
1892 	}
1893 
1894 	return 0;
1895 }
1896 
1897 static const struct ave_soc_data ave_pro4_data = {
1898 	.is_desc_64bit = false,
1899 	.clock_names = {
1900 		"gio", "ether", "ether-gb", "ether-phy",
1901 	},
1902 	.reset_names = {
1903 		"gio", "ether",
1904 	},
1905 	.get_pinmode = ave_pro4_get_pinmode,
1906 };
1907 
1908 static const struct ave_soc_data ave_pxs2_data = {
1909 	.is_desc_64bit = false,
1910 	.clock_names = {
1911 		"ether",
1912 	},
1913 	.reset_names = {
1914 		"ether",
1915 	},
1916 	.get_pinmode = ave_pro4_get_pinmode,
1917 };
1918 
1919 static const struct ave_soc_data ave_ld11_data = {
1920 	.is_desc_64bit = false,
1921 	.clock_names = {
1922 		"ether",
1923 	},
1924 	.reset_names = {
1925 		"ether",
1926 	},
1927 	.get_pinmode = ave_ld11_get_pinmode,
1928 };
1929 
1930 static const struct ave_soc_data ave_ld20_data = {
1931 	.is_desc_64bit = true,
1932 	.clock_names = {
1933 		"ether",
1934 	},
1935 	.reset_names = {
1936 		"ether",
1937 	},
1938 	.get_pinmode = ave_ld20_get_pinmode,
1939 };
1940 
1941 static const struct ave_soc_data ave_pxs3_data = {
1942 	.is_desc_64bit = false,
1943 	.clock_names = {
1944 		"ether",
1945 	},
1946 	.reset_names = {
1947 		"ether",
1948 	},
1949 	.get_pinmode = ave_pxs3_get_pinmode,
1950 };
1951 
1952 static const struct of_device_id of_ave_match[] = {
1953 	{
1954 		.compatible = "socionext,uniphier-pro4-ave4",
1955 		.data = &ave_pro4_data,
1956 	},
1957 	{
1958 		.compatible = "socionext,uniphier-pxs2-ave4",
1959 		.data = &ave_pxs2_data,
1960 	},
1961 	{
1962 		.compatible = "socionext,uniphier-ld11-ave4",
1963 		.data = &ave_ld11_data,
1964 	},
1965 	{
1966 		.compatible = "socionext,uniphier-ld20-ave4",
1967 		.data = &ave_ld20_data,
1968 	},
1969 	{
1970 		.compatible = "socionext,uniphier-pxs3-ave4",
1971 		.data = &ave_pxs3_data,
1972 	},
1973 	{ /* Sentinel */ }
1974 };
1975 MODULE_DEVICE_TABLE(of, of_ave_match);
1976 
1977 static struct platform_driver ave_driver = {
1978 	.probe  = ave_probe,
1979 	.remove = ave_remove,
1980 	.driver	= {
1981 		.name = "ave",
1982 		.pm   = AVE_PM_OPS,
1983 		.of_match_table	= of_ave_match,
1984 	},
1985 };
1986 module_platform_driver(ave_driver);
1987 
1988 MODULE_AUTHOR("Kunihiko Hayashi <hayashi.kunihiko@socionext.com>");
1989 MODULE_DESCRIPTION("Socionext UniPhier AVE ethernet driver");
1990 MODULE_LICENSE("GPL v2");
1991