[people/ms/u-boot.git] / net / eth.c

/*
 * (C) Copyright 2001-2004
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <command.h>
#include <net.h>
#include <miiphy.h>

#if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI)

/*
 * CPU and board-specific Ethernet initializations.  Aliased function
 * signals caller to move on
 */
static int __def_eth_init(bd_t *bis)
{
	return -1;
}
int cpu_eth_init(bd_t *bis) __attribute((weak, alias("__def_eth_init")));
int board_eth_init(bd_t *bis) __attribute((weak, alias("__def_eth_init")));

extern int mv6436x_eth_initialize(bd_t *);
extern int mv6446x_eth_initialize(bd_t *);

#ifdef CONFIG_API
extern void (*push_packet)(volatile void *, int);

static struct {
	uchar data[PKTSIZE];
	int length;
} eth_rcv_bufs[PKTBUFSRX];

static unsigned int eth_rcv_current = 0, eth_rcv_last = 0;
#endif

static struct eth_device *eth_devices, *eth_current;

struct eth_device *eth_get_dev(void)
{
	return eth_current;
}

struct eth_device *eth_get_dev_by_name(char *devname)
{
	struct eth_device *dev, *target_dev;

	if (!eth_devices)
		return NULL;

	dev = eth_devices;
	target_dev = NULL;
	do {
		if (strcmp(devname, dev->name) == 0) {
			target_dev = dev;
			break;
		}
		dev = dev->next;
	} while (dev != eth_devices);

	return target_dev;
}

int eth_get_dev_index (void)
{
	struct eth_device *dev;
	int num = 0;

	if (!eth_devices) {
		return (-1);
	}

	for (dev = eth_devices; dev; dev = dev->next) {
		if (dev == eth_current)
			break;
		++num;
	}

	if (dev) {
		return (num);
	}

	return (0);
}

int eth_register(struct eth_device* dev)
{
	struct eth_device *d;

	if (!eth_devices) {
		eth_current = eth_devices = dev;
#ifdef CONFIG_NET_MULTI
		/* update current ethernet name */
		{
			char *act = getenv("ethact");
			if (act == NULL || strcmp(act, eth_current->name) != 0)
				setenv("ethact", eth_current->name);
		}
#endif
	} else {
		for (d=eth_devices; d->next!=eth_devices; d=d->next);
		d->next = dev;
	}

	dev->state = ETH_STATE_INIT;
	dev->next  = eth_devices;

	return 0;
}

int eth_initialize(bd_t *bis)
{
	char enetvar[32];
	unsigned char env_enetaddr[6];
	int i, eth_number = 0;
	char *tmp, *end;

	eth_devices = NULL;
	eth_current = NULL;

	show_boot_progress (64);
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
	miiphy_init();
#endif
	/* Try board-specific initialization first.  If it fails or isn't
	 * present, try the cpu-specific initialization */
	if (board_eth_init(bis) < 0)
		cpu_eth_init(bis);

#if defined(CONFIG_DB64360) || defined(CONFIG_CPCI750)
	mv6436x_eth_initialize(bis);
#endif
#if defined(CONFIG_DB64460) || defined(CONFIG_P3Mx)
	mv6446x_eth_initialize(bis);
#endif
	if (!eth_devices) {
		puts ("No ethernet found.\n");
		show_boot_progress (-64);
	} else {
		struct eth_device *dev = eth_devices;
		char *ethprime = getenv ("ethprime");

		show_boot_progress (65);
		do {
			if (eth_number)
				puts (", ");

			printf("%s", dev->name);

			if (ethprime && strcmp (dev->name, ethprime) == 0) {
				eth_current = dev;
				puts (" [PRIME]");
			}

			sprintf(enetvar, eth_number ? "eth%daddr" : "ethaddr", eth_number);
			tmp = getenv (enetvar);

			for (i=0; i<6; i++) {
				env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
				if (tmp)
					tmp = (*end) ? end+1 : end;
			}

			if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
				if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
				    memcmp(dev->enetaddr, env_enetaddr, 6))
				{
					printf ("\nWarning: %s MAC addresses don't match:\n",
						dev->name);
					printf ("Address in SROM is         "
					       "%02X:%02X:%02X:%02X:%02X:%02X\n",
					       dev->enetaddr[0], dev->enetaddr[1],
					       dev->enetaddr[2], dev->enetaddr[3],
					       dev->enetaddr[4], dev->enetaddr[5]);
					printf ("Address in environment is  "
					       "%02X:%02X:%02X:%02X:%02X:%02X\n",
					       env_enetaddr[0], env_enetaddr[1],
					       env_enetaddr[2], env_enetaddr[3],
					       env_enetaddr[4], env_enetaddr[5]);
				}

				memcpy(dev->enetaddr, env_enetaddr, 6);
			}

			eth_number++;
			dev = dev->next;
		} while(dev != eth_devices);

#ifdef CONFIG_NET_MULTI
		/* update current ethernet name */
		if (eth_current) {
			char *act = getenv("ethact");
			if (act == NULL || strcmp(act, eth_current->name) != 0)
				setenv("ethact", eth_current->name);
		} else
			setenv("ethact", NULL);
#endif

		putc ('\n');
	}

	return eth_number;
}

void eth_set_enetaddr(int num, char *addr) {
	struct eth_device *dev;
	unsigned char enetaddr[6];
	char *end;
	int i;

	debug ("eth_set_enetaddr(num=%d, addr=%s)\n", num, addr);

	if (!eth_devices)
		return;

	for (i=0; i<6; i++) {
		enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
		if (addr)
			addr = (*end) ? end+1 : end;
	}

	dev = eth_devices;
	while(num-- > 0) {
		dev = dev->next;

		if (dev == eth_devices)
			return;
	}

	debug ( "Setting new HW address on %s\n"
		"New Address is             %02X:%02X:%02X:%02X:%02X:%02X\n",
		dev->name,
		enetaddr[0], enetaddr[1],
		enetaddr[2], enetaddr[3],
		enetaddr[4], enetaddr[5]);

	memcpy(dev->enetaddr, enetaddr, 6);
}
#ifdef CONFIG_MCAST_TFTP
/* Multicast.
 * mcast_addr: multicast ipaddr from which multicast Mac is made
 * join: 1=join, 0=leave.
 */
int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
{
 u8 mcast_mac[6];
	if (!eth_current || !eth_current->mcast)
		return -1;
	mcast_mac[5] = htonl(mcast_ip) & 0xff;
	mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
	mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
	mcast_mac[2] = 0x5e;
	mcast_mac[1] = 0x0;
	mcast_mac[0] = 0x1;
	return eth_current->mcast(eth_current, mcast_mac, join);
}

/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
 * and this is the ethernet-crc method needed for TSEC -- and perhaps
 * some other adapter -- hash tables
 */
#define CRCPOLY_LE 0xedb88320
u32 ether_crc (size_t len, unsigned char const *p)
{
	int i;
	u32 crc;
	crc = ~0;
	while (len--) {
		crc ^= *p++;
		for (i = 0; i < 8; i++)
			crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
	}
	/* an reverse the bits, cuz of way they arrive -- last-first */
	crc = (crc >> 16) | (crc << 16);
	crc = (crc >> 8 & 0x00ff00ff) | (crc << 8 & 0xff00ff00);
	crc = (crc >> 4 & 0x0f0f0f0f) | (crc << 4 & 0xf0f0f0f0);
	crc = (crc >> 2 & 0x33333333) | (crc << 2 & 0xcccccccc);
	crc = (crc >> 1 & 0x55555555) | (crc << 1 & 0xaaaaaaaa);
	return crc;
}

#endif


int eth_init(bd_t *bis)
{
	struct eth_device* old_current;

	if (!eth_current) {
		puts ("No ethernet found.\n");
		return -1;
	}

	old_current = eth_current;
	do {
		debug ("Trying %s\n", eth_current->name);

		if (eth_current->init(eth_current,bis) >= 0) {
			eth_current->state = ETH_STATE_ACTIVE;

			return 0;
		}
		debug  ("FAIL\n");

		eth_try_another(0);
	} while (old_current != eth_current);

	return -1;
}

void eth_halt(void)
{
	if (!eth_current)
		return;

	eth_current->halt(eth_current);

	eth_current->state = ETH_STATE_PASSIVE;
}

int eth_send(volatile void *packet, int length)
{
	if (!eth_current)
		return -1;

	return eth_current->send(eth_current, packet, length);
}

int eth_rx(void)
{
	if (!eth_current)
		return -1;

	return eth_current->recv(eth_current);
}

#ifdef CONFIG_API
static void eth_save_packet(volatile void *packet, int length)
{
	volatile char *p = packet;
	int i;

	if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
		return;

	if (PKTSIZE < length)
		return;

	for (i = 0; i < length; i++)
		eth_rcv_bufs[eth_rcv_last].data[i] = p[i];

	eth_rcv_bufs[eth_rcv_last].length = length;
	eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
}

int eth_receive(volatile void *packet, int length)
{
	volatile char *p = packet;
	void *pp = push_packet;
	int i;

	if (eth_rcv_current == eth_rcv_last) {
		push_packet = eth_save_packet;
		eth_rx();
		push_packet = pp;

		if (eth_rcv_current == eth_rcv_last)
			return -1;
	}

	if (length < eth_rcv_bufs[eth_rcv_current].length)
		return -1;

	length = eth_rcv_bufs[eth_rcv_current].length;

	for (i = 0; i < length; i++)
		p[i] = eth_rcv_bufs[eth_rcv_current].data[i];

	eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
	return length;
}
#endif /* CONFIG_API */

void eth_try_another(int first_restart)
{
	static struct eth_device *first_failed = NULL;
	char *ethrotate;

	/*
	 * Do not rotate between network interfaces when
	 * 'ethrotate' variable is set to 'no'.
	 */
	if (((ethrotate = getenv ("ethrotate")) != NULL) &&
	    (strcmp(ethrotate, "no") == 0))
		return;

	if (!eth_current)
		return;

	if (first_restart) {
		first_failed = eth_current;
	}

	eth_current = eth_current->next;

#ifdef CONFIG_NET_MULTI
	/* update current ethernet name */
	{
		char *act = getenv("ethact");
		if (act == NULL || strcmp(act, eth_current->name) != 0)
			setenv("ethact", eth_current->name);
	}
#endif

	if (first_failed == eth_current) {
		NetRestartWrap = 1;
	}
}

#ifdef CONFIG_NET_MULTI
void eth_set_current(void)
{
	char *act;
	struct eth_device* old_current;

	if (!eth_current)	/* XXX no current */
		return;

	act = getenv("ethact");
	if (act != NULL) {
		old_current = eth_current;
		do {
			if (strcmp(eth_current->name, act) == 0)
				return;
			eth_current = eth_current->next;
		} while (old_current != eth_current);
	}

	setenv("ethact", eth_current->name);
}
#endif

char *eth_get_name (void)
{
	return (eth_current ? eth_current->name : "unknown");
}
#elif defined(CONFIG_CMD_NET) && !defined(CONFIG_NET_MULTI)

extern int at91rm9200_miiphy_initialize(bd_t *bis);
extern int emac4xx_miiphy_initialize(bd_t *bis);
extern int mcf52x2_miiphy_initialize(bd_t *bis);
extern int ns7520_miiphy_initialize(bd_t *bis);
extern int davinci_eth_miiphy_initialize(bd_t *bis);


int eth_initialize(bd_t *bis)
{
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
	miiphy_init();
#endif

#if defined(CONFIG_AT91RM9200)
	at91rm9200_miiphy_initialize(bis);
#endif
#if defined(CONFIG_PPC4xx_EMAC)
	emac4xx_miiphy_initialize(bis);
#endif
#if defined(CONFIG_MCF52x2)
	mcf52x2_miiphy_initialize(bis);
#endif
#if defined(CONFIG_DRIVER_NS7520_ETHERNET)
	ns7520_miiphy_initialize(bis);
#endif
#if defined(CONFIG_DRIVER_TI_EMAC)
	davinci_eth_miiphy_initialize(bis);
#endif
	return 0;
}
#endif
Commit	Line	Data
c609719b	1	/*
d4ca31c4	2	* (C) Copyright 2001-2004
c609719b WD	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (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., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <common.h>
	25	#include <command.h>
	26	#include <net.h>
d9785c14	27	#include <miiphy.h>
c609719b	28
643d1ab2	29	#if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI)
c609719b	30
dd35479a BW	31	/*
	32	* CPU and board-specific Ethernet initializations. Aliased function
	33	* signals caller to move on
	34	*/
	35	static int __def_eth_init(bd_t *bis)
	36	{
	37	return -1;
	38	}
	39	int cpu_eth_init(bd_t *bis) __attribute((weak, alias("__def_eth_init")));
	40	int board_eth_init(bd_t *bis) __attribute((weak, alias("__def_eth_init")));
	41
3a473b2a WD	42	extern int mv6436x_eth_initialize(bd_t *);
3a473b2a WD	43	extern int mv6446x_eth_initialize(bd_t *);
c609719b	44
f85b6071 RJ	45	#ifdef CONFIG_API
	46	extern void (push_packet)(volatile void , int);
	47
	48	static struct {
	49	uchar data[PKTSIZE];
	50	int length;
	51	} eth_rcv_bufs[PKTBUFSRX];
	52
	53	static unsigned int eth_rcv_current = 0, eth_rcv_last = 0;
	54	#endif
	55
c609719b WD	56	static struct eth_device eth_devices, eth_current;
	57
	58	struct eth_device *eth_get_dev(void)
	59	{
	60	return eth_current;
	61	}
	62
63ff004c MB	63	struct eth_device eth_get_dev_by_name(char devname)
	64	{
	65	struct eth_device dev, target_dev;
	66
	67	if (!eth_devices)
	68	return NULL;
	69
	70	dev = eth_devices;
	71	target_dev = NULL;
	72	do {
	73	if (strcmp(devname, dev->name) == 0) {
	74	target_dev = dev;
	75	break;
	76	}
	77	dev = dev->next;
	78	} while (dev != eth_devices);
	79
	80	return target_dev;
	81	}
	82
c609719b WD	83	int eth_get_dev_index (void)
	84	{
	85	struct eth_device *dev;
	86	int num = 0;
	87
	88	if (!eth_devices) {
	89	return (-1);
	90	}
	91
	92	for (dev = eth_devices; dev; dev = dev->next) {
	93	if (dev == eth_current)
	94	break;
	95	++num;
	96	}
	97
	98	if (dev) {
	99	return (num);
	100	}
	101
	102	return (0);
	103	}
	104
	105	int eth_register(struct eth_device* dev)
	106	{
	107	struct eth_device *d;
	108
	109	if (!eth_devices) {
	110	eth_current = eth_devices = dev;
a3d991bd WD	111	#ifdef CONFIG_NET_MULTI
	112	/* update current ethernet name */
	113	{
	114	char *act = getenv("ethact");
	115	if (act == NULL \|\| strcmp(act, eth_current->name) != 0)
	116	setenv("ethact", eth_current->name);
	117	}
	118	#endif
c609719b WD	119	} else {
	120	for (d=eth_devices; d->next!=eth_devices; d=d->next);
	121	d->next = dev;
	122	}
	123
	124	dev->state = ETH_STATE_INIT;
	125	dev->next = eth_devices;
	126
	127	return 0;
	128	}
	129
	130	int eth_initialize(bd_t *bis)
	131	{
5ca2d095 SK	132	char enetvar[32];
5ca2d095 SK	133	unsigned char env_enetaddr[6];
c609719b WD	134	int i, eth_number = 0;
	135	char tmp, end;
	136
	137	eth_devices = NULL;
	138	eth_current = NULL;
	139
fad63407	140	show_boot_progress (64);
643d1ab2	141	#if defined(CONFIG_MII) \|\| defined(CONFIG_CMD_MII)
d9785c14 MB	142	miiphy_init();
d9785c14 MB	143	#endif
dd35479a BW	144	/* Try board-specific initialization first. If it fails or isn't
	145	* present, try the cpu-specific initialization */
	146	if (board_eth_init(bis) < 0)
	147	cpu_eth_init(bis);
d9785c14	148
1eac2a71	149	#if defined(CONFIG_DB64360) \|\| defined(CONFIG_CPCI750)
3a473b2a WD	150	mv6436x_eth_initialize(bis);
3a473b2a WD	151	#endif
1eac2a71	152	#if defined(CONFIG_DB64460) \|\| defined(CONFIG_P3Mx)
3a473b2a	153	mv6446x_eth_initialize(bis);
c68a05fe	154	#endif
c609719b WD	155	if (!eth_devices) {
c609719b WD	156	puts ("No ethernet found.\n");
fad63407	157	show_boot_progress (-64);
c609719b WD	158	} else {
	159	struct eth_device *dev = eth_devices;
	160	char *ethprime = getenv ("ethprime");
	161
fad63407	162	show_boot_progress (65);
c609719b WD	163	do {
	164	if (eth_number)
	165	puts (", ");
	166
	167	printf("%s", dev->name);
	168
	169	if (ethprime && strcmp (dev->name, ethprime) == 0) {
	170	eth_current = dev;
	171	puts (" [PRIME]");
	172	}
	173
	174	sprintf(enetvar, eth_number ? "eth%daddr" : "ethaddr", eth_number);
	175	tmp = getenv (enetvar);
	176
	177	for (i=0; i<6; i++) {
	178	env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
	179	if (tmp)
	180	tmp = (*end) ? end+1 : end;
	181	}
	182
	183	if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
	184	if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
	185	memcmp(dev->enetaddr, env_enetaddr, 6))
	186	{
baac607c WD	187	printf ("\nWarning: %s MAC addresses don't match:\n",
	188	dev->name);
	189	printf ("Address in SROM is "
c609719b WD	190	"%02X:%02X:%02X:%02X:%02X:%02X\n",
	191	dev->enetaddr[0], dev->enetaddr[1],
	192	dev->enetaddr[2], dev->enetaddr[3],
	193	dev->enetaddr[4], dev->enetaddr[5]);
baac607c	194	printf ("Address in environment is "
c609719b WD	195	"%02X:%02X:%02X:%02X:%02X:%02X\n",
	196	env_enetaddr[0], env_enetaddr[1],
	197	env_enetaddr[2], env_enetaddr[3],
	198	env_enetaddr[4], env_enetaddr[5]);
	199	}
	200
	201	memcpy(dev->enetaddr, env_enetaddr, 6);
	202	}
	203
	204	eth_number++;
	205	dev = dev->next;
	206	} while(dev != eth_devices);
	207
a3d991bd WD	208	#ifdef CONFIG_NET_MULTI
	209	/* update current ethernet name */
	210	if (eth_current) {
	211	char *act = getenv("ethact");
	212	if (act == NULL \|\| strcmp(act, eth_current->name) != 0)
	213	setenv("ethact", eth_current->name);
	214	} else
	215	setenv("ethact", NULL);
	216	#endif
	217
c609719b WD	218	putc ('\n');
	219	}
	220
	221	return eth_number;
	222	}
	223
	224	void eth_set_enetaddr(int num, char *addr) {
	225	struct eth_device *dev;
	226	unsigned char enetaddr[6];
	227	char *end;
	228	int i;
	229
d4ca31c4 WD	230	debug ("eth_set_enetaddr(num=%d, addr=%s)\n", num, addr);
d4ca31c4 WD	231
c609719b WD	232	if (!eth_devices)
	233	return;
	234
	235	for (i=0; i<6; i++) {
	236	enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
	237	if (addr)
	238	addr = (*end) ? end+1 : end;
	239	}
	240
	241	dev = eth_devices;
	242	while(num-- > 0) {
	243	dev = dev->next;
	244
	245	if (dev == eth_devices)
	246	return;
	247	}
	248
d4ca31c4 WD	249	debug ( "Setting new HW address on %s\n"
	250	"New Address is %02X:%02X:%02X:%02X:%02X:%02X\n",
	251	dev->name,
a188b585 WD	252	enetaddr[0], enetaddr[1],
	253	enetaddr[2], enetaddr[3],
	254	enetaddr[4], enetaddr[5]);
c609719b WD	255
	256	memcpy(dev->enetaddr, enetaddr, 6);
	257	}
53a5c424 DU	258	#ifdef CONFIG_MCAST_TFTP
	259	/* Multicast.
	260	* mcast_addr: multicast ipaddr from which multicast Mac is made
85eb5caf	261	* join: 1=join, 0=leave.
53a5c424 DU	262	*/
	263	int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
	264	{
	265	u8 mcast_mac[6];
85eb5caf	266	if (!eth_current \|\| !eth_current->mcast)
53a5c424 DU	267	return -1;
	268	mcast_mac[5] = htonl(mcast_ip) & 0xff;
	269	mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
	270	mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
	271	mcast_mac[2] = 0x5e;
	272	mcast_mac[1] = 0x0;
	273	mcast_mac[0] = 0x1;
	274	return eth_current->mcast(eth_current, mcast_mac, join);
	275	}
	276
85eb5caf WD	277	/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
85eb5caf WD	278	* and this is the ethernet-crc method needed for TSEC -- and perhaps
53a5c424 DU	279	* some other adapter -- hash tables
	280	*/
	281	#define CRCPOLY_LE 0xedb88320
	282	u32 ether_crc (size_t len, unsigned char const *p)
	283	{
	284	int i;
	285	u32 crc;
	286	crc = ~0;
	287	while (len--) {
	288	crc ^= *p++;
	289	for (i = 0; i < 8; i++)
	290	crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
	291	}
	292	/* an reverse the bits, cuz of way they arrive -- last-first */
	293	crc = (crc >> 16) \| (crc << 16);
	294	crc = (crc >> 8 & 0x00ff00ff) \| (crc << 8 & 0xff00ff00);
	295	crc = (crc >> 4 & 0x0f0f0f0f) \| (crc << 4 & 0xf0f0f0f0);
	296	crc = (crc >> 2 & 0x33333333) \| (crc << 2 & 0xcccccccc);
	297	crc = (crc >> 1 & 0x55555555) \| (crc << 1 & 0xaaaaaaaa);
	298	return crc;
	299	}
	300
	301	#endif
	302
c609719b WD	303
	304	int eth_init(bd_t *bis)
	305	{
	306	struct eth_device* old_current;
	307
6bc11388 SR	308	if (!eth_current) {
6bc11388 SR	309	puts ("No ethernet found.\n");
505be87a	310	return -1;
6bc11388	311	}
c609719b WD	312
	313	old_current = eth_current;
	314	do {
d4ca31c4	315	debug ("Trying %s\n", eth_current->name);
c609719b	316
422b1a01	317	if (eth_current->init(eth_current,bis) >= 0) {
c609719b WD	318	eth_current->state = ETH_STATE_ACTIVE;
c609719b WD	319
505be87a	320	return 0;
c609719b	321	}
d4ca31c4	322	debug ("FAIL\n");
c609719b WD	323
	324	eth_try_another(0);
	325	} while (old_current != eth_current);
	326
505be87a	327	return -1;
c609719b WD	328	}
	329
	330	void eth_halt(void)
	331	{
	332	if (!eth_current)
	333	return;
	334
	335	eth_current->halt(eth_current);
	336
	337	eth_current->state = ETH_STATE_PASSIVE;
	338	}
	339
	340	int eth_send(volatile void *packet, int length)
	341	{
	342	if (!eth_current)
	343	return -1;
	344
	345	return eth_current->send(eth_current, packet, length);
	346	}
	347
	348	int eth_rx(void)
	349	{
	350	if (!eth_current)
	351	return -1;
	352
	353	return eth_current->recv(eth_current);
	354	}
	355
f85b6071 RJ	356	#ifdef CONFIG_API
	357	static void eth_save_packet(volatile void *packet, int length)
	358	{
	359	volatile char *p = packet;
	360	int i;
	361
	362	if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
	363	return;
	364
	365	if (PKTSIZE < length)
	366	return;
	367
	368	for (i = 0; i < length; i++)
	369	eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
	370
	371	eth_rcv_bufs[eth_rcv_last].length = length;
	372	eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
	373	}
	374
	375	int eth_receive(volatile void *packet, int length)
	376	{
	377	volatile char *p = packet;
	378	void *pp = push_packet;
	379	int i;
	380
	381	if (eth_rcv_current == eth_rcv_last) {
	382	push_packet = eth_save_packet;
	383	eth_rx();
	384	push_packet = pp;
	385
	386	if (eth_rcv_current == eth_rcv_last)
	387	return -1;
	388	}
	389
	390	if (length < eth_rcv_bufs[eth_rcv_current].length)
	391	return -1;
	392
	393	length = eth_rcv_bufs[eth_rcv_current].length;
	394
	395	for (i = 0; i < length; i++)
	396	p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
	397
	398	eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
	399	return length;
	400	}
	401	#endif /* CONFIG_API */
	402
c609719b WD	403	void eth_try_another(int first_restart)
	404	{
	405	static struct eth_device *first_failed = NULL;
e1692577 MF	406	char *ethrotate;
	407
	408	/*
	409	* Do not rotate between network interfaces when
	410	* 'ethrotate' variable is set to 'no'.
	411	*/
	412	if (((ethrotate = getenv ("ethrotate")) != NULL) &&
	413	(strcmp(ethrotate, "no") == 0))
	414	return;
c609719b WD	415
	416	if (!eth_current)
	417	return;
	418
baac607c	419	if (first_restart) {
c609719b WD	420	first_failed = eth_current;
	421	}
	422
	423	eth_current = eth_current->next;
	424
a3d991bd WD	425	#ifdef CONFIG_NET_MULTI
	426	/* update current ethernet name */
	427	{
	428	char *act = getenv("ethact");
	429	if (act == NULL \|\| strcmp(act, eth_current->name) != 0)
	430	setenv("ethact", eth_current->name);
	431	}
	432	#endif
	433
baac607c	434	if (first_failed == eth_current) {
c609719b WD	435	NetRestartWrap = 1;
	436	}
	437	}
	438
a3d991bd WD	439	#ifdef CONFIG_NET_MULTI
	440	void eth_set_current(void)
	441	{
	442	char *act;
	443	struct eth_device* old_current;
	444
	445	if (!eth_current) /* XXX no current */
	446	return;
	447
	448	act = getenv("ethact");
	449	if (act != NULL) {
	450	old_current = eth_current;
	451	do {
	452	if (strcmp(eth_current->name, act) == 0)
	453	return;
	454	eth_current = eth_current->next;
	455	} while (old_current != eth_current);
	456	}
	457
	458	setenv("ethact", eth_current->name);
	459	}
	460	#endif
	461
5bb226e8 WD	462	char *eth_get_name (void)
	463	{
	464	return (eth_current ? eth_current->name : "unknown");
	465	}
643d1ab2	466	#elif defined(CONFIG_CMD_NET) && !defined(CONFIG_NET_MULTI)
63ff004c MB	467
	468	extern int at91rm9200_miiphy_initialize(bd_t *bis);
	469	extern int emac4xx_miiphy_initialize(bd_t *bis);
	470	extern int mcf52x2_miiphy_initialize(bd_t *bis);
	471	extern int ns7520_miiphy_initialize(bd_t *bis);
d6e04258	472	extern int davinci_eth_miiphy_initialize(bd_t *bis);
c74b2108	473
63ff004c MB	474
	475	int eth_initialize(bd_t *bis)
	476	{
643d1ab2	477	#if defined(CONFIG_MII) \|\| defined(CONFIG_CMD_MII)
d9785c14 MB	478	miiphy_init();
	479	#endif
	480
63ff004c MB	481	#if defined(CONFIG_AT91RM9200)
	482	at91rm9200_miiphy_initialize(bis);
	483	#endif
96e21f86	484	#if defined(CONFIG_PPC4xx_EMAC)
63ff004c MB	485	emac4xx_miiphy_initialize(bis);
	486	#endif
	487	#if defined(CONFIG_MCF52x2)
	488	mcf52x2_miiphy_initialize(bis);
	489	#endif
25dbe98a	490	#if defined(CONFIG_DRIVER_NS7520_ETHERNET)
63ff004c	491	ns7520_miiphy_initialize(bis);
c74b2108 SK	492	#endif
c74b2108 SK	493	#if defined(CONFIG_DRIVER_TI_EMAC)
fcaac589	494	davinci_eth_miiphy_initialize(bis);
63ff004c MB	495	#endif
	496	return 0;
	497	}
c609719b	498	#endif