xref: /rk3399_rockchip-uboot/drivers/net/sh_eth.c (revision ff4e66e93c1ad47644be3b4ffd6a46e1ce9b6612)
1 /*
2  * sh_eth.c - Driver for Renesas SH7763's ethernet controler.
3  *
4  * Copyright (C) 2008 Renesas Solutions Corp.
5  * Copyright (c) 2008 Nobuhiro Iwamatsu
6  * Copyright (c) 2007 Carlos Munoz <carlos@kenati.com>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21  */
22 
23 #include <config.h>
24 #include <common.h>
25 #include <malloc.h>
26 #include <net.h>
27 #include <netdev.h>
28 #include <asm/errno.h>
29 #include <asm/io.h>
30 
31 #include "sh_eth.h"
32 
33 #ifndef CONFIG_SH_ETHER_USE_PORT
34 # error "Please define CONFIG_SH_ETHER_USE_PORT"
35 #endif
36 #ifndef CONFIG_SH_ETHER_PHY_ADDR
37 # error "Please define CONFIG_SH_ETHER_PHY_ADDR"
38 #endif
39 
40 #define SH_ETH_PHY_DELAY 50000
41 
42 /*
43  * Bits are written to the PHY serially using the
44  * PIR register, just like a bit banger.
45  */
46 static void sh_eth_mii_write_phy_bits(int port, u32 val, int len)
47 {
48 	int i;
49 	u32 pir;
50 
51 	/* Bit positions is 1 less than the number of bits */
52 	for (i = len - 1; i >= 0; i--) {
53 		/* Write direction, bit to write, clock is low */
54 		pir = 2 | ((val & 1 << i) ? 1 << 2 : 0);
55 		outl(pir, PIR(port));
56 		udelay(1);
57 		/* Write direction, bit to write, clock is high */
58 		pir = 3 | ((val & 1 << i) ? 1 << 2 : 0);
59 		outl(pir, PIR(port));
60 		udelay(1);
61 		/* Write direction, bit to write, clock is low */
62 		pir = 2 | ((val & 1 << i) ? 1 << 2 : 0);
63 		outl(pir, PIR(port));
64 		udelay(1);
65 	}
66 }
67 
68 static void sh_eth_mii_bus_release(int port)
69 {
70 	/* Read direction, clock is low */
71 	outl(0, PIR(port));
72 	udelay(1);
73 	/* Read direction, clock is high */
74 	outl(1, PIR(port));
75 	udelay(1);
76 	/* Read direction, clock is low */
77 	outl(0, PIR(port));
78 	udelay(1);
79 }
80 
81 static void sh_eth_mii_ind_bus_release(int port)
82 {
83 	/* Read direction, clock is low */
84 	outl(0, PIR(port));
85 	udelay(1);
86 }
87 
88 static void sh_eth_mii_read_phy_bits(int port, u32 *val, int len)
89 {
90 	int i;
91 	u32 pir;
92 
93 	*val = 0;
94 	for (i = len - 1; i >= 0; i--) {
95 		/* Read direction, clock is high */
96 		outl(1, PIR(port));
97 		udelay(1);
98 		/* Read bit */
99 		pir = inl(PIR(port));
100 		*val |= (pir & 8) ? 1 << i : 0;
101 		/* Read direction, clock is low */
102 		outl(0, PIR(port));
103 		udelay(1);
104 	}
105 }
106 
107 #define PHY_INIT	0xFFFFFFFF
108 #define PHY_READ	0x02
109 #define PHY_WRITE	0x01
110 /*
111  * To read a phy register, mii managements frames are sent to the phy.
112  * The frames look like this:
113  * pre (32 bits):	0xffff ffff
114  * st (2 bits):		01
115  * op (2bits):		10: read 01: write
116  * phyad (5 bits):	xxxxx
117  * regad (5 bits):	xxxxx
118  * ta (Bus release):
119  * data (16 bits):	read data
120  */
121 static u32 sh_eth_mii_read_phy_reg(int port, u8 phy_addr, int reg)
122 {
123 	u32 val;
124 
125 	/* Sent mii management frame */
126 	/* pre */
127 	sh_eth_mii_write_phy_bits(port, PHY_INIT, 32);
128 	/* st (start of frame) */
129 	sh_eth_mii_write_phy_bits(port, 0x1, 2);
130 	/* op (code) */
131 	sh_eth_mii_write_phy_bits(port, PHY_READ, 2);
132 	/* phy address */
133 	sh_eth_mii_write_phy_bits(port, phy_addr, 5);
134 	/* Register to read */
135 	sh_eth_mii_write_phy_bits(port, reg, 5);
136 
137 	/* Bus release */
138 	sh_eth_mii_bus_release(port);
139 
140 	/* Read register */
141 	sh_eth_mii_read_phy_bits(port, &val, 16);
142 
143 	return val;
144 }
145 
146 /*
147  * To write a phy register, mii managements frames are sent to the phy.
148  * The frames look like this:
149  * pre (32 bits):	0xffff ffff
150  * st (2 bits):		01
151  * op (2bits):		10: read 01: write
152  * phyad (5 bits):	xxxxx
153  * regad (5 bits):	xxxxx
154  * ta (2 bits):		10
155  * data (16 bits):	write data
156  * idle (Independent bus release)
157  */
158 static void sh_eth_mii_write_phy_reg(int port, u8 phy_addr, int reg, u16 val)
159 {
160 	/* Sent mii management frame */
161 	/* pre */
162 	sh_eth_mii_write_phy_bits(port, PHY_INIT, 32);
163 	/* st (start of frame) */
164 	sh_eth_mii_write_phy_bits(port, 0x1, 2);
165 	/* op (code) */
166 	sh_eth_mii_write_phy_bits(port, PHY_WRITE, 2);
167 	/* phy address */
168 	sh_eth_mii_write_phy_bits(port, phy_addr, 5);
169 	/* Register to read */
170 	sh_eth_mii_write_phy_bits(port, reg, 5);
171 	/* ta */
172 	sh_eth_mii_write_phy_bits(port, PHY_READ, 2);
173 	/* Write register data */
174 	sh_eth_mii_write_phy_bits(port, val, 16);
175 
176 	/* Independent bus release */
177 	sh_eth_mii_ind_bus_release(port);
178 }
179 
180 int sh_eth_send(struct eth_device *dev, volatile void *packet, int len)
181 {
182 	struct sh_eth_dev *eth = dev->priv;
183 	int port = eth->port, ret = 0, timeout;
184 	struct sh_eth_info *port_info = &eth->port_info[port];
185 
186 	if (!packet || len > 0xffff) {
187 		printf(SHETHER_NAME ": %s: Invalid argument\n", __func__);
188 		ret = -EINVAL;
189 		goto err;
190 	}
191 
192 	/* packet must be a 4 byte boundary */
193 	if ((int)packet & (4 - 1)) {
194 		printf(SHETHER_NAME ": %s: packet not 4 byte alligned\n", __func__);
195 		ret = -EFAULT;
196 		goto err;
197 	}
198 
199 	/* Update tx descriptor */
200 	port_info->tx_desc_cur->td2 = ADDR_TO_PHY(packet);
201 	port_info->tx_desc_cur->td1 = len << 16;
202 	/* Must preserve the end of descriptor list indication */
203 	if (port_info->tx_desc_cur->td0 & TD_TDLE)
204 		port_info->tx_desc_cur->td0 = TD_TACT | TD_TFP | TD_TDLE;
205 	else
206 		port_info->tx_desc_cur->td0 = TD_TACT | TD_TFP;
207 
208 	/* Restart the transmitter if disabled */
209 	if (!(inl(EDTRR(port)) & EDTRR_TRNS))
210 		outl(EDTRR_TRNS, EDTRR(port));
211 
212 	/* Wait until packet is transmitted */
213 	timeout = 1000;
214 	while (port_info->tx_desc_cur->td0 & TD_TACT && timeout--)
215 		udelay(100);
216 
217 	if (timeout < 0) {
218 		printf(SHETHER_NAME ": transmit timeout\n");
219 		ret = -ETIMEDOUT;
220 		goto err;
221 	}
222 
223 	port_info->tx_desc_cur++;
224 	if (port_info->tx_desc_cur >= port_info->tx_desc_base + NUM_TX_DESC)
225 		port_info->tx_desc_cur = port_info->tx_desc_base;
226 
227 	return ret;
228 err:
229 	return ret;
230 }
231 
232 int sh_eth_recv(struct eth_device *dev)
233 {
234 	struct sh_eth_dev *eth = dev->priv;
235 	int port = eth->port, len = 0;
236 	struct sh_eth_info *port_info = &eth->port_info[port];
237 	volatile u8 *packet;
238 
239 	/* Check if the rx descriptor is ready */
240 	if (!(port_info->rx_desc_cur->rd0 & RD_RACT)) {
241 		/* Check for errors */
242 		if (!(port_info->rx_desc_cur->rd0 & RD_RFE)) {
243 			len = port_info->rx_desc_cur->rd1 & 0xffff;
244 			packet = (volatile u8 *)
245 			    ADDR_TO_P2(port_info->rx_desc_cur->rd2);
246 			NetReceive(packet, len);
247 		}
248 
249 		/* Make current descriptor available again */
250 		if (port_info->rx_desc_cur->rd0 & RD_RDLE)
251 			port_info->rx_desc_cur->rd0 = RD_RACT | RD_RDLE;
252 		else
253 			port_info->rx_desc_cur->rd0 = RD_RACT;
254 
255 		/* Point to the next descriptor */
256 		port_info->rx_desc_cur++;
257 		if (port_info->rx_desc_cur >=
258 		    port_info->rx_desc_base + NUM_RX_DESC)
259 			port_info->rx_desc_cur = port_info->rx_desc_base;
260 	}
261 
262 	/* Restart the receiver if disabled */
263 	if (!(inl(EDRRR(port)) & EDRRR_R))
264 		outl(EDRRR_R, EDRRR(port));
265 
266 	return len;
267 }
268 
269 #define EDMR_INIT_CNT 1000
270 static int sh_eth_reset(struct sh_eth_dev *eth)
271 {
272 	int port = eth->port;
273 	int ret = 0, i;
274 
275 	/* Start e-dmac transmitter and receiver */
276 	outl(EDSR_ENALL, EDSR(port));
277 
278 	/* Perform a software reset and wait for it to complete */
279 	outl(EDMR_SRST, EDMR(port));
280 	for (i = 0; i < EDMR_INIT_CNT; i++) {
281 		if (!(inl(EDMR(port)) & EDMR_SRST))
282 			break;
283 		udelay(1000);
284 	}
285 
286 	if (i == EDMR_INIT_CNT) {
287 		printf(SHETHER_NAME  ": Software reset timeout\n");
288 		ret = -EIO;
289 	}
290 
291 	return ret;
292 }
293 
294 static int sh_eth_tx_desc_init(struct sh_eth_dev *eth)
295 {
296 	int port = eth->port, i, ret = 0;
297 	u32 tmp_addr;
298 	struct sh_eth_info *port_info = &eth->port_info[port];
299 	struct tx_desc_s *cur_tx_desc;
300 
301 	/*
302 	 * Allocate tx descriptors. They must be TX_DESC_SIZE bytes aligned
303 	 */
304 	port_info->tx_desc_malloc = malloc(NUM_TX_DESC *
305 						 sizeof(struct tx_desc_s) +
306 						 TX_DESC_SIZE - 1);
307 	if (!port_info->tx_desc_malloc) {
308 		printf(SHETHER_NAME ": malloc failed\n");
309 		ret = -ENOMEM;
310 		goto err;
311 	}
312 
313 	tmp_addr = (u32) (((int)port_info->tx_desc_malloc + TX_DESC_SIZE - 1) &
314 			  ~(TX_DESC_SIZE - 1));
315 	/* Make sure we use a P2 address (non-cacheable) */
316 	port_info->tx_desc_base = (struct tx_desc_s *)ADDR_TO_P2(tmp_addr);
317 	port_info->tx_desc_cur = port_info->tx_desc_base;
318 
319 	/* Initialize all descriptors */
320 	for (cur_tx_desc = port_info->tx_desc_base, i = 0; i < NUM_TX_DESC;
321 	     cur_tx_desc++, i++) {
322 		cur_tx_desc->td0 = 0x00;
323 		cur_tx_desc->td1 = 0x00;
324 		cur_tx_desc->td2 = 0x00;
325 	}
326 
327 	/* Mark the end of the descriptors */
328 	cur_tx_desc--;
329 	cur_tx_desc->td0 |= TD_TDLE;
330 
331 	/* Point the controller to the tx descriptor list. Must use physical
332 	   addresses */
333 	outl(ADDR_TO_PHY(port_info->tx_desc_base), TDLAR(port));
334 	outl(ADDR_TO_PHY(port_info->tx_desc_base), TDFAR(port));
335 	outl(ADDR_TO_PHY(cur_tx_desc), TDFXR(port));
336 	outl(0x01, TDFFR(port));/* Last discriptor bit */
337 
338 err:
339 	return ret;
340 }
341 
342 static int sh_eth_rx_desc_init(struct sh_eth_dev *eth)
343 {
344 	int port = eth->port, i , ret = 0;
345 	struct sh_eth_info *port_info = &eth->port_info[port];
346 	struct rx_desc_s *cur_rx_desc;
347 	u32 tmp_addr;
348 	u8 *rx_buf;
349 
350 	/*
351 	 * Allocate rx descriptors. They must be RX_DESC_SIZE bytes aligned
352 	 */
353 	port_info->rx_desc_malloc = malloc(NUM_RX_DESC *
354 						 sizeof(struct rx_desc_s) +
355 						 RX_DESC_SIZE - 1);
356 	if (!port_info->rx_desc_malloc) {
357 		printf(SHETHER_NAME ": malloc failed\n");
358 		ret = -ENOMEM;
359 		goto err;
360 	}
361 
362 	tmp_addr = (u32) (((int)port_info->rx_desc_malloc + RX_DESC_SIZE - 1) &
363 			  ~(RX_DESC_SIZE - 1));
364 	/* Make sure we use a P2 address (non-cacheable) */
365 	port_info->rx_desc_base = (struct rx_desc_s *)ADDR_TO_P2(tmp_addr);
366 
367 	port_info->rx_desc_cur = port_info->rx_desc_base;
368 
369 	/*
370 	 * Allocate rx data buffers. They must be 32 bytes aligned  and in
371 	 * P2 area
372 	 */
373 	port_info->rx_buf_malloc = malloc(NUM_RX_DESC * MAX_BUF_SIZE + 31);
374 	if (!port_info->rx_buf_malloc) {
375 		printf(SHETHER_NAME ": malloc failed\n");
376 		ret = -ENOMEM;
377 		goto err_buf_malloc;
378 	}
379 
380 	tmp_addr = (u32)(((int)port_info->rx_buf_malloc + (32 - 1)) &
381 			  ~(32 - 1));
382 	port_info->rx_buf_base = (u8 *)ADDR_TO_P2(tmp_addr);
383 
384 	/* Initialize all descriptors */
385 	for (cur_rx_desc = port_info->rx_desc_base,
386 	     rx_buf = port_info->rx_buf_base, i = 0;
387 	     i < NUM_RX_DESC; cur_rx_desc++, rx_buf += MAX_BUF_SIZE, i++) {
388 		cur_rx_desc->rd0 = RD_RACT;
389 		cur_rx_desc->rd1 = MAX_BUF_SIZE << 16;
390 		cur_rx_desc->rd2 = (u32) ADDR_TO_PHY(rx_buf);
391 	}
392 
393 	/* Mark the end of the descriptors */
394 	cur_rx_desc--;
395 	cur_rx_desc->rd0 |= RD_RDLE;
396 
397 	/* Point the controller to the rx descriptor list */
398 	outl(ADDR_TO_PHY(port_info->rx_desc_base), RDLAR(port));
399 	outl(ADDR_TO_PHY(port_info->rx_desc_base), RDFAR(port));
400 	outl(ADDR_TO_PHY(cur_rx_desc), RDFXR(port));
401 	outl(RDFFR_RDLF, RDFFR(port));
402 
403 	return ret;
404 
405 err_buf_malloc:
406 	free(port_info->rx_desc_malloc);
407 	port_info->rx_desc_malloc = NULL;
408 
409 err:
410 	return ret;
411 }
412 
413 static void sh_eth_tx_desc_free(struct sh_eth_dev *eth)
414 {
415 	int port = eth->port;
416 	struct sh_eth_info *port_info = &eth->port_info[port];
417 
418 	if (port_info->tx_desc_malloc) {
419 		free(port_info->tx_desc_malloc);
420 		port_info->tx_desc_malloc = NULL;
421 	}
422 }
423 
424 static void sh_eth_rx_desc_free(struct sh_eth_dev *eth)
425 {
426 	int port = eth->port;
427 	struct sh_eth_info *port_info = &eth->port_info[port];
428 
429 	if (port_info->rx_desc_malloc) {
430 		free(port_info->rx_desc_malloc);
431 		port_info->rx_desc_malloc = NULL;
432 	}
433 
434 	if (port_info->rx_buf_malloc) {
435 		free(port_info->rx_buf_malloc);
436 		port_info->rx_buf_malloc = NULL;
437 	}
438 }
439 
440 static int sh_eth_desc_init(struct sh_eth_dev *eth)
441 {
442 	int ret = 0;
443 
444 	ret = sh_eth_tx_desc_init(eth);
445 	if (ret)
446 		goto err_tx_init;
447 
448 	ret = sh_eth_rx_desc_init(eth);
449 	if (ret)
450 		goto err_rx_init;
451 
452 	return ret;
453 err_rx_init:
454 	sh_eth_tx_desc_free(eth);
455 
456 err_tx_init:
457 	return ret;
458 }
459 
460 static int sh_eth_phy_config(struct sh_eth_dev *eth)
461 {
462 	int port = eth->port, timeout, ret = 0;
463 	struct sh_eth_info *port_info = &eth->port_info[port];
464 	u32 val;
465 
466 	/* Reset phy */
467 	sh_eth_mii_write_phy_reg
468 		(port, port_info->phy_addr, PHY_CTRL, PHY_C_RESET);
469 	timeout = 10;
470 	while (timeout--) {
471 		val = sh_eth_mii_read_phy_reg(port,
472 				port_info->phy_addr, PHY_CTRL);
473 		if (!(val & PHY_C_RESET))
474 			break;
475 		udelay(SH_ETH_PHY_DELAY);
476 	}
477 
478 	if (timeout < 0) {
479 		printf(SHETHER_NAME ": phy reset timeout\n");
480 		ret = -EIO;
481 		goto err_tout;
482 	}
483 
484 	/* Advertise 100/10 baseT full/half duplex */
485 	sh_eth_mii_write_phy_reg(port, port_info->phy_addr, PHY_ANA,
486 		(PHY_A_FDX|PHY_A_HDX|PHY_A_10FDX|PHY_A_10HDX|PHY_A_EXT));
487 	/* Autonegotiation, normal operation, full duplex, enable tx */
488 	sh_eth_mii_write_phy_reg(port, port_info->phy_addr, PHY_CTRL,
489 		(PHY_C_ANEGEN|PHY_C_RANEG));
490 	/* Wait for autonegotiation to complete */
491 	timeout = 100;
492 	while (timeout--) {
493 		val = sh_eth_mii_read_phy_reg(port, port_info->phy_addr, 1);
494 		if (val & PHY_S_ANEGC)
495 			break;
496 
497 		udelay(SH_ETH_PHY_DELAY);
498 	}
499 
500 	if (timeout < 0) {
501 		printf(SHETHER_NAME ": phy auto-negotiation failed\n");
502 		ret = -ETIMEDOUT;
503 		goto err_tout;
504 	}
505 
506 	return ret;
507 
508 err_tout:
509 	return ret;
510 }
511 
512 static int sh_eth_config(struct sh_eth_dev *eth, bd_t *bd)
513 {
514 	int port = eth->port, ret = 0;
515 	u32 val,  phy_status;
516 	struct sh_eth_info *port_info = &eth->port_info[port];
517 
518 	/* Configure e-dmac registers */
519 	outl((inl(EDMR(port)) & ~EMDR_DESC_R) | EDMR_EL, EDMR(port));
520 	outl(0, EESIPR(port));
521 	outl(0, TRSCER(port));
522 	outl(0, TFTR(port));
523 	outl((FIFO_SIZE_T | FIFO_SIZE_R), FDR(port));
524 	outl(RMCR_RST, RMCR(port));
525 	outl(0, RPADIR(port));
526 	outl((FIFO_F_D_RFF | FIFO_F_D_RFD), FCFTR(port));
527 
528 	/* Configure e-mac registers */
529 	outl(0, ECSIPR(port));
530 
531 	/* Set Mac address */
532 	val = bd->bi_enetaddr[0] << 24 | bd->bi_enetaddr[1] << 16 |
533 	    bd->bi_enetaddr[2] << 8 | bd->bi_enetaddr[3];
534 	outl(val, MAHR(port));
535 
536 	val = bd->bi_enetaddr[4] << 8 | bd->bi_enetaddr[5];
537 	outl(val, MALR(port));
538 
539 	outl(RFLR_RFL_MIN, RFLR(port));
540 	outl(0, PIPR(port));
541 	outl(APR_AP, APR(port));
542 	outl(MPR_MP, MPR(port));
543 	outl(TPAUSER_TPAUSE, TPAUSER(port));
544 
545 	/* Configure phy */
546 	ret = sh_eth_phy_config(eth);
547 	if (ret) {
548 		printf(SHETHER_NAME ":i phy config timeout\n");
549 		goto err_phy_cfg;
550 	}
551 	/* Read phy status to finish configuring the e-mac */
552 	phy_status = sh_eth_mii_read_phy_reg(port, port_info->phy_addr, 1);
553 
554 	/* Set the transfer speed */
555 	if (phy_status & (PHY_S_100X_F|PHY_S_100X_H)) {
556 		printf(SHETHER_NAME ": 100Base/");
557 		outl(GECMR_100B, GECMR(port));
558 	} else {
559 		printf(SHETHER_NAME ": 10Base/");
560 		outl(GECMR_10B, GECMR(port));
561 	}
562 
563 	/* Check if full duplex mode is supported by the phy */
564 	if (phy_status & (PHY_S_100X_F|PHY_S_10T_F)) {
565 		printf("Full\n");
566 		outl((ECMR_CHG_DM|ECMR_RE|ECMR_TE|ECMR_DM), ECMR(port));
567 	} else {
568 		printf("Half\n");
569 		outl((ECMR_CHG_DM|ECMR_RE|ECMR_TE),  ECMR(port));
570 	}
571 
572 	return ret;
573 
574 err_phy_cfg:
575 	return ret;
576 }
577 
578 static void sh_eth_start(struct sh_eth_dev *eth)
579 {
580 	/*
581 	 * Enable the e-dmac receiver only. The transmitter will be enabled when
582 	 * we have something to transmit
583 	 */
584 	outl(EDRRR_R, EDRRR(eth->port));
585 }
586 
587 static void sh_eth_stop(struct sh_eth_dev *eth)
588 {
589 	outl(~EDRRR_R, EDRRR(eth->port));
590 }
591 
592 static int sh_eth_get_mac(bd_t *bd)
593 {
594 	char *s, *e;
595 
596 	s = getenv("ethaddr");
597 	if (s != NULL) {
598 		int i;
599 		for (i = 0; i < 6; ++i) {
600 			bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0;
601 			if (s)
602 				s = (*e) ? e + 1 : e;
603 		}
604 	} else {
605 		puts("Please set MAC address\n");
606 	}
607 	return 0;
608 }
609 
610 int sh_eth_init(struct eth_device *dev, bd_t *bd)
611 {
612 	int ret = 0;
613 	struct sh_eth_dev *eth = dev->priv;
614 
615 	ret = sh_eth_reset(eth);
616 	if (ret)
617 		goto err;
618 
619 	ret = sh_eth_desc_init(eth);
620 	if (ret)
621 		goto err;
622 
623 	ret = sh_eth_config(eth, bd);
624 	if (ret)
625 		goto err_config;
626 
627 	sh_eth_start(eth);
628 
629 	return ret;
630 
631 err_config:
632 	sh_eth_tx_desc_free(eth);
633 	sh_eth_rx_desc_free(eth);
634 
635 err:
636 	return ret;
637 }
638 
639 void sh_eth_halt(struct eth_device *dev)
640 {
641 	struct sh_eth_dev *eth = dev->priv;
642 
643 	sh_eth_reset(eth);
644 	sh_eth_stop(eth);
645 }
646 
647 int sh_eth_initialize(bd_t *bd)
648 {
649     int ret = 0;
650 	struct sh_eth_dev *eth = NULL;
651     struct eth_device *dev = NULL;
652 
653     eth = (struct sh_eth_dev *)malloc(sizeof(struct sh_eth_dev));
654 	if (!eth) {
655 		printf(SHETHER_NAME ": %s: malloc failed\n", __func__);
656 		ret = -ENOMEM;
657 		goto err;
658 	}
659 
660     dev = (struct eth_device *)malloc(sizeof(struct eth_device));
661 	if (!dev) {
662 		printf(SHETHER_NAME ": %s: malloc failed\n", __func__);
663 		ret = -ENOMEM;
664 		goto err;
665 	}
666     memset(dev, 0, sizeof(struct eth_device));
667     memset(eth, 0, sizeof(struct sh_eth_dev));
668 
669 	eth->port = CONFIG_SH_ETHER_USE_PORT;
670 	eth->port_info[eth->port].phy_addr = CONFIG_SH_ETHER_PHY_ADDR;
671 
672     dev->priv = (void *)eth;
673     dev->iobase = 0;
674     dev->init = sh_eth_init;
675     dev->halt = sh_eth_halt;
676     dev->send = sh_eth_send;
677     dev->recv = sh_eth_recv;
678     eth->port_info[eth->port].dev = dev;
679 
680 	sprintf(dev->name, SHETHER_NAME);
681 
682     /* Register Device to EtherNet subsystem  */
683     eth_register(dev);
684 
685 	sh_eth_get_mac(bd);
686 
687 	return ret;
688 
689 err:
690 	if (dev)
691 		free(dev);
692 
693 	if (eth)
694 		free(eth);
695 
696 	printf(SHETHER_NAME ": Failed\n");
697 	return ret;
698 }
699