xref: /rk3399_rockchip-uboot/drivers/net/xilinx_axi_emac.c (revision f09854810cf99c0bf3a31a5d26b4c556186ea302)
1 /*
2  * Copyright (C) 2011 Michal Simek <monstr@monstr.eu>
3  * Copyright (C) 2011 PetaLogix
4  * Copyright (C) 2010 Xilinx, Inc. All rights reserved.
5  *
6  * SPDX-License-Identifier:	GPL-2.0+
7  */
8 
9 #include <config.h>
10 #include <common.h>
11 #include <net.h>
12 #include <malloc.h>
13 #include <asm/io.h>
14 #include <phy.h>
15 #include <miiphy.h>
16 
17 #if !defined(CONFIG_PHYLIB)
18 # error AXI_ETHERNET requires PHYLIB
19 #endif
20 
21 /* Link setup */
22 #define XAE_EMMC_LINKSPEED_MASK	0xC0000000 /* Link speed */
23 #define XAE_EMMC_LINKSPD_10	0x00000000 /* Link Speed mask for 10 Mbit */
24 #define XAE_EMMC_LINKSPD_100	0x40000000 /* Link Speed mask for 100 Mbit */
25 #define XAE_EMMC_LINKSPD_1000	0x80000000 /* Link Speed mask for 1000 Mbit */
26 
27 /* Interrupt Status/Enable/Mask Registers bit definitions */
28 #define XAE_INT_RXRJECT_MASK	0x00000008 /* Rx frame rejected */
29 #define XAE_INT_MGTRDY_MASK	0x00000080 /* MGT clock Lock */
30 
31 /* Receive Configuration Word 1 (RCW1) Register bit definitions */
32 #define XAE_RCW1_RX_MASK	0x10000000 /* Receiver enable */
33 
34 /* Transmitter Configuration (TC) Register bit definitions */
35 #define XAE_TC_TX_MASK		0x10000000 /* Transmitter enable */
36 
37 #define XAE_UAW1_UNICASTADDR_MASK	0x0000FFFF
38 
39 /* MDIO Management Configuration (MC) Register bit definitions */
40 #define XAE_MDIO_MC_MDIOEN_MASK		0x00000040 /* MII management enable*/
41 
42 /* MDIO Management Control Register (MCR) Register bit definitions */
43 #define XAE_MDIO_MCR_PHYAD_MASK		0x1F000000 /* Phy Address Mask */
44 #define XAE_MDIO_MCR_PHYAD_SHIFT	24	   /* Phy Address Shift */
45 #define XAE_MDIO_MCR_REGAD_MASK		0x001F0000 /* Reg Address Mask */
46 #define XAE_MDIO_MCR_REGAD_SHIFT	16	   /* Reg Address Shift */
47 #define XAE_MDIO_MCR_OP_READ_MASK	0x00008000 /* Op Code Read Mask */
48 #define XAE_MDIO_MCR_OP_WRITE_MASK	0x00004000 /* Op Code Write Mask */
49 #define XAE_MDIO_MCR_INITIATE_MASK	0x00000800 /* Ready Mask */
50 #define XAE_MDIO_MCR_READY_MASK		0x00000080 /* Ready Mask */
51 
52 #define XAE_MDIO_DIV_DFT	29	/* Default MDIO clock divisor */
53 
54 /* DMA macros */
55 /* Bitmasks of XAXIDMA_CR_OFFSET register */
56 #define XAXIDMA_CR_RUNSTOP_MASK	0x00000001 /* Start/stop DMA channel */
57 #define XAXIDMA_CR_RESET_MASK	0x00000004 /* Reset DMA engine */
58 
59 /* Bitmasks of XAXIDMA_SR_OFFSET register */
60 #define XAXIDMA_HALTED_MASK	0x00000001  /* DMA channel halted */
61 
62 /* Bitmask for interrupts */
63 #define XAXIDMA_IRQ_IOC_MASK	0x00001000 /* Completion intr */
64 #define XAXIDMA_IRQ_DELAY_MASK	0x00002000 /* Delay interrupt */
65 #define XAXIDMA_IRQ_ALL_MASK	0x00007000 /* All interrupts */
66 
67 /* Bitmasks of XAXIDMA_BD_CTRL_OFFSET register */
68 #define XAXIDMA_BD_CTRL_TXSOF_MASK	0x08000000 /* First tx packet */
69 #define XAXIDMA_BD_CTRL_TXEOF_MASK	0x04000000 /* Last tx packet */
70 
71 #define DMAALIGN	128
72 
73 static u8 rxframe[PKTSIZE_ALIGN] __attribute((aligned(DMAALIGN)));
74 
75 /* Reflect dma offsets */
76 struct axidma_reg {
77 	u32 control; /* DMACR */
78 	u32 status; /* DMASR */
79 	u32 current; /* CURDESC */
80 	u32 reserved;
81 	u32 tail; /* TAILDESC */
82 };
83 
84 /* Private driver structures */
85 struct axidma_priv {
86 	struct axidma_reg *dmatx;
87 	struct axidma_reg *dmarx;
88 	int phyaddr;
89 	struct axi_regs *iobase;
90 	struct phy_device *phydev;
91 	struct mii_dev *bus;
92 };
93 
94 /* BD descriptors */
95 struct axidma_bd {
96 	u32 next;	/* Next descriptor pointer */
97 	u32 reserved1;
98 	u32 phys;	/* Buffer address */
99 	u32 reserved2;
100 	u32 reserved3;
101 	u32 reserved4;
102 	u32 cntrl;	/* Control */
103 	u32 status;	/* Status */
104 	u32 app0;
105 	u32 app1;	/* TX start << 16 | insert */
106 	u32 app2;	/* TX csum seed */
107 	u32 app3;
108 	u32 app4;
109 	u32 sw_id_offset;
110 	u32 reserved5;
111 	u32 reserved6;
112 };
113 
114 /* Static BDs - driver uses only one BD */
115 static struct axidma_bd tx_bd __attribute((aligned(DMAALIGN)));
116 static struct axidma_bd rx_bd __attribute((aligned(DMAALIGN)));
117 
118 struct axi_regs {
119 	u32 reserved[3];
120 	u32 is; /* 0xC: Interrupt status */
121 	u32 reserved2;
122 	u32 ie; /* 0x14: Interrupt enable */
123 	u32 reserved3[251];
124 	u32 rcw1; /* 0x404: Rx Configuration Word 1 */
125 	u32 tc; /* 0x408: Tx Configuration */
126 	u32 reserved4;
127 	u32 emmc; /* 0x410: EMAC mode configuration */
128 	u32 reserved5[59];
129 	u32 mdio_mc; /* 0x500: MII Management Config */
130 	u32 mdio_mcr; /* 0x504: MII Management Control */
131 	u32 mdio_mwd; /* 0x508: MII Management Write Data */
132 	u32 mdio_mrd; /* 0x50C: MII Management Read Data */
133 	u32 reserved6[124];
134 	u32 uaw0; /* 0x700: Unicast address word 0 */
135 	u32 uaw1; /* 0x704: Unicast address word 1 */
136 };
137 
138 /* Use MII register 1 (MII status register) to detect PHY */
139 #define PHY_DETECT_REG  1
140 
141 /*
142  * Mask used to verify certain PHY features (or register contents)
143  * in the register above:
144  *  0x1000: 10Mbps full duplex support
145  *  0x0800: 10Mbps half duplex support
146  *  0x0008: Auto-negotiation support
147  */
148 #define PHY_DETECT_MASK 0x1808
149 
150 static inline int mdio_wait(struct axi_regs *regs)
151 {
152 	u32 timeout = 200;
153 
154 	/* Wait till MDIO interface is ready to accept a new transaction. */
155 	while (timeout && (!(in_be32(&regs->mdio_mcr)
156 						& XAE_MDIO_MCR_READY_MASK))) {
157 		timeout--;
158 		udelay(1);
159 	}
160 	if (!timeout) {
161 		printf("%s: Timeout\n", __func__);
162 		return 1;
163 	}
164 	return 0;
165 }
166 
167 static u32 phyread(struct axidma_priv *priv, u32 phyaddress, u32 registernum,
168 		   u16 *val)
169 {
170 	struct axi_regs *regs = priv->iobase;
171 	u32 mdioctrlreg = 0;
172 
173 	if (mdio_wait(regs))
174 		return 1;
175 
176 	mdioctrlreg = ((phyaddress << XAE_MDIO_MCR_PHYAD_SHIFT) &
177 			XAE_MDIO_MCR_PHYAD_MASK) |
178 			((registernum << XAE_MDIO_MCR_REGAD_SHIFT)
179 			& XAE_MDIO_MCR_REGAD_MASK) |
180 			XAE_MDIO_MCR_INITIATE_MASK |
181 			XAE_MDIO_MCR_OP_READ_MASK;
182 
183 	out_be32(&regs->mdio_mcr, mdioctrlreg);
184 
185 	if (mdio_wait(regs))
186 		return 1;
187 
188 	/* Read data */
189 	*val = in_be32(&regs->mdio_mrd);
190 	return 0;
191 }
192 
193 static u32 phywrite(struct axidma_priv *priv, u32 phyaddress, u32 registernum,
194 		    u32 data)
195 {
196 	struct axi_regs *regs = priv->iobase;
197 	u32 mdioctrlreg = 0;
198 
199 	if (mdio_wait(regs))
200 		return 1;
201 
202 	mdioctrlreg = ((phyaddress << XAE_MDIO_MCR_PHYAD_SHIFT) &
203 			XAE_MDIO_MCR_PHYAD_MASK) |
204 			((registernum << XAE_MDIO_MCR_REGAD_SHIFT)
205 			& XAE_MDIO_MCR_REGAD_MASK) |
206 			XAE_MDIO_MCR_INITIATE_MASK |
207 			XAE_MDIO_MCR_OP_WRITE_MASK;
208 
209 	/* Write data */
210 	out_be32(&regs->mdio_mwd, data);
211 
212 	out_be32(&regs->mdio_mcr, mdioctrlreg);
213 
214 	if (mdio_wait(regs))
215 		return 1;
216 
217 	return 0;
218 }
219 
220 /* Setting axi emac and phy to proper setting */
221 static int setup_phy(struct eth_device *dev)
222 {
223 	u16 phyreg;
224 	u32 i, speed, emmc_reg, ret;
225 	struct axidma_priv *priv = dev->priv;
226 	struct axi_regs *regs = priv->iobase;
227 	struct phy_device *phydev;
228 
229 	u32 supported = SUPPORTED_10baseT_Half |
230 			SUPPORTED_10baseT_Full |
231 			SUPPORTED_100baseT_Half |
232 			SUPPORTED_100baseT_Full |
233 			SUPPORTED_1000baseT_Half |
234 			SUPPORTED_1000baseT_Full;
235 
236 	if (priv->phyaddr == -1) {
237 		/* Detect the PHY address */
238 		for (i = 31; i >= 0; i--) {
239 			ret = phyread(priv, i, PHY_DETECT_REG, &phyreg);
240 			if (!ret && (phyreg != 0xFFFF) &&
241 			((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) {
242 				/* Found a valid PHY address */
243 				priv->phyaddr = i;
244 				debug("axiemac: Found valid phy address, %x\n",
245 				      i);
246 				break;
247 			}
248 		}
249 	}
250 
251 	/* Interface - look at tsec */
252 	phydev = phy_connect(priv->bus, priv->phyaddr, dev, 0);
253 
254 	phydev->supported &= supported;
255 	phydev->advertising = phydev->supported;
256 	priv->phydev = phydev;
257 	phy_config(phydev);
258 	if (phy_startup(phydev)) {
259 		printf("axiemac: could not initialize PHY %s\n",
260 		       phydev->dev->name);
261 		return 0;
262 	}
263 	if (!phydev->link) {
264 		printf("%s: No link.\n", phydev->dev->name);
265 		return 0;
266 	}
267 
268 	switch (phydev->speed) {
269 	case 1000:
270 		speed = XAE_EMMC_LINKSPD_1000;
271 		break;
272 	case 100:
273 		speed = XAE_EMMC_LINKSPD_100;
274 		break;
275 	case 10:
276 		speed = XAE_EMMC_LINKSPD_10;
277 		break;
278 	default:
279 		return 0;
280 	}
281 
282 	/* Setup the emac for the phy speed */
283 	emmc_reg = in_be32(&regs->emmc);
284 	emmc_reg &= ~XAE_EMMC_LINKSPEED_MASK;
285 	emmc_reg |= speed;
286 
287 	/* Write new speed setting out to Axi Ethernet */
288 	out_be32(&regs->emmc, emmc_reg);
289 
290 	/*
291 	* Setting the operating speed of the MAC needs a delay. There
292 	* doesn't seem to be register to poll, so please consider this
293 	* during your application design.
294 	*/
295 	udelay(1);
296 
297 	return 1;
298 }
299 
300 /* STOP DMA transfers */
301 static void axiemac_halt(struct eth_device *dev)
302 {
303 	struct axidma_priv *priv = dev->priv;
304 	u32 temp;
305 
306 	/* Stop the hardware */
307 	temp = in_be32(&priv->dmatx->control);
308 	temp &= ~XAXIDMA_CR_RUNSTOP_MASK;
309 	out_be32(&priv->dmatx->control, temp);
310 
311 	temp = in_be32(&priv->dmarx->control);
312 	temp &= ~XAXIDMA_CR_RUNSTOP_MASK;
313 	out_be32(&priv->dmarx->control, temp);
314 
315 	debug("axiemac: Halted\n");
316 }
317 
318 static int axi_ethernet_init(struct axidma_priv *priv)
319 {
320 	struct axi_regs *regs = priv->iobase;
321 	u32 timeout = 200;
322 
323 	/*
324 	 * Check the status of the MgtRdy bit in the interrupt status
325 	 * registers. This must be done to allow the MGT clock to become stable
326 	 * for the Sgmii and 1000BaseX PHY interfaces. No other register reads
327 	 * will be valid until this bit is valid.
328 	 * The bit is always a 1 for all other PHY interfaces.
329 	 */
330 	while (timeout && (!(in_be32(&regs->is) & XAE_INT_MGTRDY_MASK))) {
331 		timeout--;
332 		udelay(1);
333 	}
334 	if (!timeout) {
335 		printf("%s: Timeout\n", __func__);
336 		return 1;
337 	}
338 
339 	/* Stop the device and reset HW */
340 	/* Disable interrupts */
341 	out_be32(&regs->ie, 0);
342 
343 	/* Disable the receiver */
344 	out_be32(&regs->rcw1, in_be32(&regs->rcw1) & ~XAE_RCW1_RX_MASK);
345 
346 	/*
347 	 * Stopping the receiver in mid-packet causes a dropped packet
348 	 * indication from HW. Clear it.
349 	 */
350 	/* Set the interrupt status register to clear the interrupt */
351 	out_be32(&regs->is, XAE_INT_RXRJECT_MASK);
352 
353 	/* Setup HW */
354 	/* Set default MDIO divisor */
355 	out_be32(&regs->mdio_mc, XAE_MDIO_DIV_DFT | XAE_MDIO_MC_MDIOEN_MASK);
356 
357 	debug("axiemac: InitHw done\n");
358 	return 0;
359 }
360 
361 static int axiemac_setup_mac(struct eth_device *dev)
362 {
363 	struct axi_regs *regs = (struct axi_regs *)dev->iobase;
364 
365 	/* Set the MAC address */
366 	int val = ((dev->enetaddr[3] << 24) | (dev->enetaddr[2] << 16) |
367 		(dev->enetaddr[1] << 8) | (dev->enetaddr[0]));
368 	out_be32(&regs->uaw0, val);
369 
370 	val = (dev->enetaddr[5] << 8) | dev->enetaddr[4] ;
371 	val |= in_be32(&regs->uaw1) & ~XAE_UAW1_UNICASTADDR_MASK;
372 	out_be32(&regs->uaw1, val);
373 	return 0;
374 }
375 
376 /* Reset DMA engine */
377 static void axi_dma_init(struct axidma_priv *priv)
378 {
379 	u32 timeout = 500;
380 
381 	/* Reset the engine so the hardware starts from a known state */
382 	out_be32(&priv->dmatx->control, XAXIDMA_CR_RESET_MASK);
383 	out_be32(&priv->dmarx->control, XAXIDMA_CR_RESET_MASK);
384 
385 	/* At the initialization time, hardware should finish reset quickly */
386 	while (timeout--) {
387 		/* Check transmit/receive channel */
388 		/* Reset is done when the reset bit is low */
389 		if (!((in_be32(&priv->dmatx->control) |
390 				in_be32(&priv->dmarx->control))
391 						& XAXIDMA_CR_RESET_MASK)) {
392 			break;
393 		}
394 	}
395 	if (!timeout)
396 		printf("%s: Timeout\n", __func__);
397 }
398 
399 static int axiemac_init(struct eth_device *dev, bd_t * bis)
400 {
401 	struct axidma_priv *priv = dev->priv;
402 	struct axi_regs *regs = (struct axi_regs *)dev->iobase;
403 	u32 temp;
404 
405 	debug("axiemac: Init started\n");
406 	/*
407 	 * Initialize AXIDMA engine. AXIDMA engine must be initialized before
408 	 * AxiEthernet. During AXIDMA engine initialization, AXIDMA hardware is
409 	 * reset, and since AXIDMA reset line is connected to AxiEthernet, this
410 	 * would ensure a reset of AxiEthernet.
411 	 */
412 	axi_dma_init(priv);
413 
414 	/* Initialize AxiEthernet hardware. */
415 	if (axi_ethernet_init(priv))
416 		return -1;
417 
418 	/* Disable all RX interrupts before RxBD space setup */
419 	temp = in_be32(&priv->dmarx->control);
420 	temp &= ~XAXIDMA_IRQ_ALL_MASK;
421 	out_be32(&priv->dmarx->control, temp);
422 
423 	/* Start DMA RX channel. Now it's ready to receive data.*/
424 	out_be32(&priv->dmarx->current, (u32)&rx_bd);
425 
426 	/* Setup the BD. */
427 	memset(&rx_bd, 0, sizeof(rx_bd));
428 	rx_bd.next = (u32)&rx_bd;
429 	rx_bd.phys = (u32)&rxframe;
430 	rx_bd.cntrl = sizeof(rxframe);
431 	/* Flush the last BD so DMA core could see the updates */
432 	flush_cache((u32)&rx_bd, sizeof(rx_bd));
433 
434 	/* It is necessary to flush rxframe because if you don't do it
435 	 * then cache can contain uninitialized data */
436 	flush_cache((u32)&rxframe, sizeof(rxframe));
437 
438 	/* Start the hardware */
439 	temp = in_be32(&priv->dmarx->control);
440 	temp |= XAXIDMA_CR_RUNSTOP_MASK;
441 	out_be32(&priv->dmarx->control, temp);
442 
443 	/* Rx BD is ready - start */
444 	out_be32(&priv->dmarx->tail, (u32)&rx_bd);
445 
446 	/* Enable TX */
447 	out_be32(&regs->tc, XAE_TC_TX_MASK);
448 	/* Enable RX */
449 	out_be32(&regs->rcw1, XAE_RCW1_RX_MASK);
450 
451 	/* PHY setup */
452 	if (!setup_phy(dev)) {
453 		axiemac_halt(dev);
454 		return -1;
455 	}
456 
457 	debug("axiemac: Init complete\n");
458 	return 0;
459 }
460 
461 static int axiemac_send(struct eth_device *dev, void *ptr, int len)
462 {
463 	struct axidma_priv *priv = dev->priv;
464 	u32 timeout;
465 
466 	if (len > PKTSIZE_ALIGN)
467 		len = PKTSIZE_ALIGN;
468 
469 	/* Flush packet to main memory to be trasfered by DMA */
470 	flush_cache((u32)ptr, len);
471 
472 	/* Setup Tx BD */
473 	memset(&tx_bd, 0, sizeof(tx_bd));
474 	/* At the end of the ring, link the last BD back to the top */
475 	tx_bd.next = (u32)&tx_bd;
476 	tx_bd.phys = (u32)ptr;
477 	/* Save len */
478 	tx_bd.cntrl = len | XAXIDMA_BD_CTRL_TXSOF_MASK |
479 						XAXIDMA_BD_CTRL_TXEOF_MASK;
480 
481 	/* Flush the last BD so DMA core could see the updates */
482 	flush_cache((u32)&tx_bd, sizeof(tx_bd));
483 
484 	if (in_be32(&priv->dmatx->status) & XAXIDMA_HALTED_MASK) {
485 		u32 temp;
486 		out_be32(&priv->dmatx->current, (u32)&tx_bd);
487 		/* Start the hardware */
488 		temp = in_be32(&priv->dmatx->control);
489 		temp |= XAXIDMA_CR_RUNSTOP_MASK;
490 		out_be32(&priv->dmatx->control, temp);
491 	}
492 
493 	/* Start transfer */
494 	out_be32(&priv->dmatx->tail, (u32)&tx_bd);
495 
496 	/* Wait for transmission to complete */
497 	debug("axiemac: Waiting for tx to be done\n");
498 	timeout = 200;
499 	while (timeout && (!(in_be32(&priv->dmatx->status) &
500 			(XAXIDMA_IRQ_DELAY_MASK | XAXIDMA_IRQ_IOC_MASK)))) {
501 		timeout--;
502 		udelay(1);
503 	}
504 	if (!timeout) {
505 		printf("%s: Timeout\n", __func__);
506 		return 1;
507 	}
508 
509 	debug("axiemac: Sending complete\n");
510 	return 0;
511 }
512 
513 static int isrxready(struct axidma_priv *priv)
514 {
515 	u32 status;
516 
517 	/* Read pending interrupts */
518 	status = in_be32(&priv->dmarx->status);
519 
520 	/* Acknowledge pending interrupts */
521 	out_be32(&priv->dmarx->status, status & XAXIDMA_IRQ_ALL_MASK);
522 
523 	/*
524 	 * If Reception done interrupt is asserted, call RX call back function
525 	 * to handle the processed BDs and then raise the according flag.
526 	 */
527 	if ((status & (XAXIDMA_IRQ_DELAY_MASK | XAXIDMA_IRQ_IOC_MASK)))
528 		return 1;
529 
530 	return 0;
531 }
532 
533 static int axiemac_recv(struct eth_device *dev)
534 {
535 	u32 length;
536 	struct axidma_priv *priv = dev->priv;
537 	u32 temp;
538 
539 	/* Wait for an incoming packet */
540 	if (!isrxready(priv))
541 		return 0;
542 
543 	debug("axiemac: RX data ready\n");
544 
545 	/* Disable IRQ for a moment till packet is handled */
546 	temp = in_be32(&priv->dmarx->control);
547 	temp &= ~XAXIDMA_IRQ_ALL_MASK;
548 	out_be32(&priv->dmarx->control, temp);
549 
550 	length = rx_bd.app4 & 0xFFFF; /* max length mask */
551 #ifdef DEBUG
552 	print_buffer(&rxframe, &rxframe[0], 1, length, 16);
553 #endif
554 	/* Pass the received frame up for processing */
555 	if (length)
556 		net_process_received_packet(rxframe, length);
557 
558 #ifdef DEBUG
559 	/* It is useful to clear buffer to be sure that it is consistent */
560 	memset(rxframe, 0, sizeof(rxframe));
561 #endif
562 	/* Setup RxBD */
563 	/* Clear the whole buffer and setup it again - all flags are cleared */
564 	memset(&rx_bd, 0, sizeof(rx_bd));
565 	rx_bd.next = (u32)&rx_bd;
566 	rx_bd.phys = (u32)&rxframe;
567 	rx_bd.cntrl = sizeof(rxframe);
568 
569 	/* Write bd to HW */
570 	flush_cache((u32)&rx_bd, sizeof(rx_bd));
571 
572 	/* It is necessary to flush rxframe because if you don't do it
573 	 * then cache will contain previous packet */
574 	flush_cache((u32)&rxframe, sizeof(rxframe));
575 
576 	/* Rx BD is ready - start again */
577 	out_be32(&priv->dmarx->tail, (u32)&rx_bd);
578 
579 	debug("axiemac: RX completed, framelength = %d\n", length);
580 
581 	return length;
582 }
583 
584 static int axiemac_miiphy_read(const char *devname, uchar addr,
585 							uchar reg, ushort *val)
586 {
587 	struct eth_device *dev = eth_get_dev();
588 	u32 ret;
589 
590 	ret = phyread(dev->priv, addr, reg, val);
591 	debug("axiemac: Read MII 0x%x, 0x%x, 0x%x\n", addr, reg, *val);
592 	return ret;
593 }
594 
595 static int axiemac_miiphy_write(const char *devname, uchar addr,
596 							uchar reg, ushort val)
597 {
598 	struct eth_device *dev = eth_get_dev();
599 
600 	debug("axiemac: Write MII 0x%x, 0x%x, 0x%x\n", addr, reg, val);
601 	return phywrite(dev->priv, addr, reg, val);
602 }
603 
604 static int axiemac_bus_reset(struct mii_dev *bus)
605 {
606 	debug("axiemac: Bus reset\n");
607 	return 0;
608 }
609 
610 int xilinx_axiemac_initialize(bd_t *bis, unsigned long base_addr,
611 							unsigned long dma_addr)
612 {
613 	struct eth_device *dev;
614 	struct axidma_priv *priv;
615 
616 	dev = calloc(1, sizeof(struct eth_device));
617 	if (dev == NULL)
618 		return -1;
619 
620 	dev->priv = calloc(1, sizeof(struct axidma_priv));
621 	if (dev->priv == NULL) {
622 		free(dev);
623 		return -1;
624 	}
625 	priv = dev->priv;
626 
627 	sprintf(dev->name, "aximac.%lx", base_addr);
628 
629 	dev->iobase = base_addr;
630 	priv->iobase = (struct axi_regs *)base_addr;
631 	priv->dmatx = (struct axidma_reg *)dma_addr;
632 	/* RX channel offset is 0x30 */
633 	priv->dmarx = (struct axidma_reg *)(dma_addr + 0x30);
634 	dev->init = axiemac_init;
635 	dev->halt = axiemac_halt;
636 	dev->send = axiemac_send;
637 	dev->recv = axiemac_recv;
638 	dev->write_hwaddr = axiemac_setup_mac;
639 
640 #ifdef CONFIG_PHY_ADDR
641 	priv->phyaddr = CONFIG_PHY_ADDR;
642 #else
643 	priv->phyaddr = -1;
644 #endif
645 
646 	eth_register(dev);
647 
648 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
649 	miiphy_register(dev->name, axiemac_miiphy_read, axiemac_miiphy_write);
650 	priv->bus = miiphy_get_dev_by_name(dev->name);
651 	priv->bus->reset = axiemac_bus_reset;
652 #endif
653 	return 1;
654 }
655