[J-u-boot.git] / net / eth.c

/*
 * (C) Copyright 2001-2004
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * 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>

#ifdef CONFIG_CMD_NET
void eth_parse_enetaddr(const char *addr, uchar *enetaddr)
{
	char *end;
	int i;

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

int eth_getenv_enetaddr(char *name, uchar *enetaddr)
{
	eth_parse_enetaddr(getenv(name), enetaddr);
	return is_valid_ether_addr(enetaddr);
}

int eth_setenv_enetaddr(char *name, const uchar *enetaddr)
{
	char buf[20];

	sprintf(buf, "%pM", enetaddr);

	return setenv(name, buf);
}

int eth_getenv_enetaddr_by_index(int index, uchar *enetaddr)
{
	char enetvar[32];
	sprintf(enetvar, index ? "eth%daddr" : "ethaddr", index);
	return eth_getenv_enetaddr(enetvar, enetaddr);
}
#endif

#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;
}

struct eth_device *eth_get_dev_by_index(int index)
{
	struct eth_device *dev, *target_dev;
	int idx = 0;

	if (!eth_devices)
		return NULL;

	dev = eth_devices;
	target_dev = NULL;
	do {
		if (idx == index) {
			target_dev = dev;
			break;
		}
		dev = dev->next;
		idx++;
	} 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)
{
	unsigned char env_enetaddr[6];
	int eth_number = 0;

	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]");
			}

			eth_getenv_enetaddr_by_index(eth_number, env_enetaddr);

			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         %pM\n",
						dev->enetaddr);
					printf ("Address in environment is  %pM\n",
						env_enetaddr);
				}

				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;
}

#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)
{
	int eth_number;
	struct eth_device *old_current, *dev;

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

	/* Sync environment with network devices */
	eth_number = 0;
	dev = eth_devices;
	do {
		uchar env_enetaddr[6];

		if (eth_getenv_enetaddr_by_index(eth_number, env_enetaddr))
			memcpy(dev->enetaddr, env_enetaddr, 6);

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

	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)
{
	static char *act = NULL;
	static int  env_changed_id = 0;
	struct eth_device* old_current;
	int	env_id;

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

	env_id = get_env_id();
	if ((act == NULL) || (env_changed_id != env_id)) {
		act = getenv("ethact");
		env_changed_id = env_id;
	}
	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)

#warning Ethernet driver is deprecated.  Please update to use CONFIG_NET_MULTI

extern int at91rm9200_miiphy_initialize(bd_t *bis);
extern int mcf52x2_miiphy_initialize(bd_t *bis);
extern int ns7520_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_MCF52x2)
	mcf52x2_miiphy_initialize(bis);
#endif
#if defined(CONFIG_DRIVER_NS7520_ETHERNET)
	ns7520_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, [email protected].
	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
3f6e6993 MF	29	#ifdef CONFIG_CMD_NET
	30	void eth_parse_enetaddr(const char addr, uchar enetaddr)
	31	{
	32	char *end;
	33	int i;
	34
	35	for (i = 0; i < 6; ++i) {
	36	enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
	37	if (addr)
	38	addr = (*end) ? end + 1 : end;
	39	}
	40	}
	41
	42	int eth_getenv_enetaddr(char name, uchar enetaddr)
	43	{
	44	eth_parse_enetaddr(getenv(name), enetaddr);
	45	return is_valid_ether_addr(enetaddr);
	46	}
	47
	48	int eth_setenv_enetaddr(char name, const uchar enetaddr)
	49	{
	50	char buf[20];
	51
	52	sprintf(buf, "%pM", enetaddr);
	53
	54	return setenv(name, buf);
	55	}
86848a74 MF	56
	57	int eth_getenv_enetaddr_by_index(int index, uchar *enetaddr)
	58	{
	59	char enetvar[32];
	60	sprintf(enetvar, index ? "eth%daddr" : "ethaddr", index);
	61	return eth_getenv_enetaddr(enetvar, enetaddr);
	62	}
3f6e6993 MF	63	#endif
3f6e6993 MF	64
643d1ab2	65	#if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI)
c609719b	66
dd35479a BW	67	/*
	68	* CPU and board-specific Ethernet initializations. Aliased function
	69	* signals caller to move on
	70	*/
	71	static int __def_eth_init(bd_t *bis)
	72	{
	73	return -1;
	74	}
f9a109b3 PT	75	int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
f9a109b3 PT	76	int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
dd35479a	77
3a473b2a WD	78	extern int mv6436x_eth_initialize(bd_t *);
3a473b2a WD	79	extern int mv6446x_eth_initialize(bd_t *);
c609719b	80
f85b6071 RJ	81	#ifdef CONFIG_API
	82	extern void (push_packet)(volatile void , int);
	83
	84	static struct {
	85	uchar data[PKTSIZE];
	86	int length;
	87	} eth_rcv_bufs[PKTBUFSRX];
	88
	89	static unsigned int eth_rcv_current = 0, eth_rcv_last = 0;
	90	#endif
	91
c609719b WD	92	static struct eth_device eth_devices, eth_current;
	93
	94	struct eth_device *eth_get_dev(void)
	95	{
	96	return eth_current;
	97	}
	98
63ff004c MB	99	struct eth_device eth_get_dev_by_name(char devname)
	100	{
	101	struct eth_device dev, target_dev;
	102
	103	if (!eth_devices)
	104	return NULL;
	105
	106	dev = eth_devices;
	107	target_dev = NULL;
	108	do {
	109	if (strcmp(devname, dev->name) == 0) {
	110	target_dev = dev;
	111	break;
	112	}
	113	dev = dev->next;
	114	} while (dev != eth_devices);
	115
	116	return target_dev;
	117	}
	118
9e56986a AF	119	struct eth_device *eth_get_dev_by_index(int index)
	120	{
	121	struct eth_device dev, target_dev;
	122	int idx = 0;
	123
	124	if (!eth_devices)
	125	return NULL;
	126
	127	dev = eth_devices;
	128	target_dev = NULL;
	129	do {
	130	if (idx == index) {
	131	target_dev = dev;
	132	break;
	133	}
	134	dev = dev->next;
	135	idx++;
	136	} while (dev != eth_devices);
	137
	138	return target_dev;
	139	}
	140
c609719b WD	141	int eth_get_dev_index (void)
	142	{
	143	struct eth_device *dev;
	144	int num = 0;
	145
	146	if (!eth_devices) {
	147	return (-1);
	148	}
	149
	150	for (dev = eth_devices; dev; dev = dev->next) {
	151	if (dev == eth_current)
	152	break;
	153	++num;
	154	}
	155
	156	if (dev) {
	157	return (num);
	158	}
	159
	160	return (0);
	161	}
	162
	163	int eth_register(struct eth_device* dev)
	164	{
	165	struct eth_device *d;
	166
	167	if (!eth_devices) {
	168	eth_current = eth_devices = dev;
a3d991bd WD	169	#ifdef CONFIG_NET_MULTI
	170	/* update current ethernet name */
	171	{
	172	char *act = getenv("ethact");
	173	if (act == NULL \|\| strcmp(act, eth_current->name) != 0)
	174	setenv("ethact", eth_current->name);
	175	}
	176	#endif
c609719b WD	177	} else {
	178	for (d=eth_devices; d->next!=eth_devices; d=d->next);
	179	d->next = dev;
	180	}
	181
	182	dev->state = ETH_STATE_INIT;
	183	dev->next = eth_devices;
	184
	185	return 0;
	186	}
	187
	188	int eth_initialize(bd_t *bis)
	189	{
5ca2d095	190	unsigned char env_enetaddr[6];
3f6e6993	191	int eth_number = 0;
c609719b WD	192
	193	eth_devices = NULL;
	194	eth_current = NULL;
	195
fad63407	196	show_boot_progress (64);
643d1ab2	197	#if defined(CONFIG_MII) \|\| defined(CONFIG_CMD_MII)
d9785c14 MB	198	miiphy_init();
d9785c14 MB	199	#endif
dd35479a BW	200	/* Try board-specific initialization first. If it fails or isn't
	201	* present, try the cpu-specific initialization */
	202	if (board_eth_init(bis) < 0)
	203	cpu_eth_init(bis);
d9785c14	204
1eac2a71	205	#if defined(CONFIG_DB64360) \|\| defined(CONFIG_CPCI750)
3a473b2a WD	206	mv6436x_eth_initialize(bis);
3a473b2a WD	207	#endif
1eac2a71	208	#if defined(CONFIG_DB64460) \|\| defined(CONFIG_P3Mx)
3a473b2a	209	mv6446x_eth_initialize(bis);
c68a05fe	210	#endif
c609719b WD	211	if (!eth_devices) {
c609719b WD	212	puts ("No ethernet found.\n");
fad63407	213	show_boot_progress (-64);
c609719b WD	214	} else {
	215	struct eth_device *dev = eth_devices;
	216	char *ethprime = getenv ("ethprime");
	217
fad63407	218	show_boot_progress (65);
c609719b WD	219	do {
	220	if (eth_number)
	221	puts (", ");
	222
	223	printf("%s", dev->name);
	224
	225	if (ethprime && strcmp (dev->name, ethprime) == 0) {
	226	eth_current = dev;
	227	puts (" [PRIME]");
	228	}
	229
86848a74	230	eth_getenv_enetaddr_by_index(eth_number, env_enetaddr);
c609719b WD	231
	232	if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
	233	if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
	234	memcmp(dev->enetaddr, env_enetaddr, 6))
	235	{
baac607c WD	236	printf ("\nWarning: %s MAC addresses don't match:\n",
baac607c WD	237	dev->name);
3f6e6993 MF	238	printf ("Address in SROM is %pM\n",
	239	dev->enetaddr);
	240	printf ("Address in environment is %pM\n",
	241	env_enetaddr);
c609719b WD	242	}
	243
	244	memcpy(dev->enetaddr, env_enetaddr, 6);
	245	}
	246
	247	eth_number++;
	248	dev = dev->next;
	249	} while(dev != eth_devices);
	250
a3d991bd WD	251	#ifdef CONFIG_NET_MULTI
	252	/* update current ethernet name */
	253	if (eth_current) {
	254	char *act = getenv("ethact");
	255	if (act == NULL \|\| strcmp(act, eth_current->name) != 0)
	256	setenv("ethact", eth_current->name);
	257	} else
	258	setenv("ethact", NULL);
	259	#endif
	260
c609719b WD	261	putc ('\n');
	262	}
	263
	264	return eth_number;
	265	}
	266
53a5c424 DU	267	#ifdef CONFIG_MCAST_TFTP
	268	/* Multicast.
	269	* mcast_addr: multicast ipaddr from which multicast Mac is made
85eb5caf	270	* join: 1=join, 0=leave.
53a5c424 DU	271	*/
	272	int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
	273	{
	274	u8 mcast_mac[6];
85eb5caf	275	if (!eth_current \|\| !eth_current->mcast)
53a5c424 DU	276	return -1;
	277	mcast_mac[5] = htonl(mcast_ip) & 0xff;
	278	mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
	279	mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
	280	mcast_mac[2] = 0x5e;
	281	mcast_mac[1] = 0x0;
	282	mcast_mac[0] = 0x1;
	283	return eth_current->mcast(eth_current, mcast_mac, join);
	284	}
	285
85eb5caf WD	286	/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
85eb5caf WD	287	* and this is the ethernet-crc method needed for TSEC -- and perhaps
53a5c424 DU	288	* some other adapter -- hash tables
	289	*/
	290	#define CRCPOLY_LE 0xedb88320
	291	u32 ether_crc (size_t len, unsigned char const *p)
	292	{
	293	int i;
	294	u32 crc;
	295	crc = ~0;
	296	while (len--) {
	297	crc ^= *p++;
	298	for (i = 0; i < 8; i++)
	299	crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
	300	}
	301	/* an reverse the bits, cuz of way they arrive -- last-first */
	302	crc = (crc >> 16) \| (crc << 16);
	303	crc = (crc >> 8 & 0x00ff00ff) \| (crc << 8 & 0xff00ff00);
	304	crc = (crc >> 4 & 0x0f0f0f0f) \| (crc << 4 & 0xf0f0f0f0);
	305	crc = (crc >> 2 & 0x33333333) \| (crc << 2 & 0xcccccccc);
	306	crc = (crc >> 1 & 0x55555555) \| (crc << 1 & 0xaaaaaaaa);
	307	return crc;
	308	}
	309
	310	#endif
	311
c609719b WD	312
	313	int eth_init(bd_t *bis)
	314	{
86848a74 MF	315	int eth_number;
86848a74 MF	316	struct eth_device old_current, dev;
c609719b	317
6bc11388 SR	318	if (!eth_current) {
6bc11388 SR	319	puts ("No ethernet found.\n");
505be87a	320	return -1;
6bc11388	321	}
c609719b	322
86848a74 MF	323	/* Sync environment with network devices */
	324	eth_number = 0;
	325	dev = eth_devices;
	326	do {
	327	uchar env_enetaddr[6];
	328
	329	if (eth_getenv_enetaddr_by_index(eth_number, env_enetaddr))
	330	memcpy(dev->enetaddr, env_enetaddr, 6);
	331
	332	++eth_number;
	333	dev = dev->next;
	334	} while (dev != eth_devices);
	335
c609719b WD	336	old_current = eth_current;
c609719b WD	337	do {
0ebf04c6	338	debug("Trying %s\n", eth_current->name);
c609719b	339
422b1a01	340	if (eth_current->init(eth_current,bis) >= 0) {
c609719b WD	341	eth_current->state = ETH_STATE_ACTIVE;
c609719b WD	342
505be87a	343	return 0;
c609719b	344	}
0ebf04c6	345	debug("FAIL\n");
c609719b WD	346
	347	eth_try_another(0);
	348	} while (old_current != eth_current);
	349
505be87a	350	return -1;
c609719b WD	351	}
	352
	353	void eth_halt(void)
	354	{
	355	if (!eth_current)
	356	return;
	357
	358	eth_current->halt(eth_current);
	359
	360	eth_current->state = ETH_STATE_PASSIVE;
	361	}
	362
	363	int eth_send(volatile void *packet, int length)
	364	{
	365	if (!eth_current)
	366	return -1;
	367
	368	return eth_current->send(eth_current, packet, length);
	369	}
	370
	371	int eth_rx(void)
	372	{
	373	if (!eth_current)
	374	return -1;
	375
	376	return eth_current->recv(eth_current);
	377	}
	378
f85b6071 RJ	379	#ifdef CONFIG_API
	380	static void eth_save_packet(volatile void *packet, int length)
	381	{
	382	volatile char *p = packet;
	383	int i;
	384
	385	if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
	386	return;
	387
	388	if (PKTSIZE < length)
	389	return;
	390
	391	for (i = 0; i < length; i++)
	392	eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
	393
	394	eth_rcv_bufs[eth_rcv_last].length = length;
	395	eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
	396	}
	397
	398	int eth_receive(volatile void *packet, int length)
	399	{
	400	volatile char *p = packet;
	401	void *pp = push_packet;
	402	int i;
	403
	404	if (eth_rcv_current == eth_rcv_last) {
	405	push_packet = eth_save_packet;
	406	eth_rx();
	407	push_packet = pp;
	408
	409	if (eth_rcv_current == eth_rcv_last)
	410	return -1;
	411	}
	412
	413	if (length < eth_rcv_bufs[eth_rcv_current].length)
	414	return -1;
	415
	416	length = eth_rcv_bufs[eth_rcv_current].length;
	417
	418	for (i = 0; i < length; i++)
	419	p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
	420
	421	eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
	422	return length;
	423	}
	424	#endif /* CONFIG_API */
	425
c609719b WD	426	void eth_try_another(int first_restart)
	427	{
	428	static struct eth_device *first_failed = NULL;
e1692577 MF	429	char *ethrotate;
	430
	431	/*
	432	* Do not rotate between network interfaces when
	433	* 'ethrotate' variable is set to 'no'.
	434	*/
	435	if (((ethrotate = getenv ("ethrotate")) != NULL) &&
	436	(strcmp(ethrotate, "no") == 0))
	437	return;
c609719b WD	438
	439	if (!eth_current)
	440	return;
	441
baac607c	442	if (first_restart) {
c609719b WD	443	first_failed = eth_current;
	444	}
	445
	446	eth_current = eth_current->next;
	447
a3d991bd WD	448	#ifdef CONFIG_NET_MULTI
	449	/* update current ethernet name */
	450	{
	451	char *act = getenv("ethact");
	452	if (act == NULL \|\| strcmp(act, eth_current->name) != 0)
	453	setenv("ethact", eth_current->name);
	454	}
	455	#endif
	456
baac607c	457	if (first_failed == eth_current) {
c609719b WD	458	NetRestartWrap = 1;
	459	}
	460	}
	461
a3d991bd WD	462	#ifdef CONFIG_NET_MULTI
	463	void eth_set_current(void)
	464	{
da95427c HS	465	static char *act = NULL;
da95427c HS	466	static int env_changed_id = 0;
a3d991bd	467	struct eth_device* old_current;
2f70c49e	468	int env_id;
a3d991bd WD	469
	470	if (!eth_current) /* XXX no current */
	471	return;
	472
2f70c49e HS	473	env_id = get_env_id();
	474	if ((act == NULL) \|\| (env_changed_id != env_id)) {
	475	act = getenv("ethact");
	476	env_changed_id = env_id;
	477	}
a3d991bd WD	478	if (act != NULL) {
	479	old_current = eth_current;
	480	do {
	481	if (strcmp(eth_current->name, act) == 0)
	482	return;
	483	eth_current = eth_current->next;
	484	} while (old_current != eth_current);
	485	}
	486
	487	setenv("ethact", eth_current->name);
	488	}
	489	#endif
	490
5bb226e8 WD	491	char *eth_get_name (void)
	492	{
	493	return (eth_current ? eth_current->name : "unknown");
	494	}
643d1ab2	495	#elif defined(CONFIG_CMD_NET) && !defined(CONFIG_NET_MULTI)
63ff004c	496
3bd0a877 BW	497	#warning Ethernet driver is deprecated. Please update to use CONFIG_NET_MULTI
3bd0a877 BW	498
63ff004c	499	extern int at91rm9200_miiphy_initialize(bd_t *bis);
63ff004c MB	500	extern int mcf52x2_miiphy_initialize(bd_t *bis);
63ff004c MB	501	extern int ns7520_miiphy_initialize(bd_t *bis);
c74b2108	502
63ff004c MB	503
	504	int eth_initialize(bd_t *bis)
	505	{
643d1ab2	506	#if defined(CONFIG_MII) \|\| defined(CONFIG_CMD_MII)
d9785c14 MB	507	miiphy_init();
	508	#endif
	509
63ff004c MB	510	#if defined(CONFIG_AT91RM9200)
	511	at91rm9200_miiphy_initialize(bis);
	512	#endif
63ff004c MB	513	#if defined(CONFIG_MCF52x2)
	514	mcf52x2_miiphy_initialize(bis);
	515	#endif
25dbe98a	516	#if defined(CONFIG_DRIVER_NS7520_ETHERNET)
63ff004c MB	517	ns7520_miiphy_initialize(bis);
	518	#endif
	519	return 0;
	520	}
c609719b	521	#endif