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

/*
 * (C) Copyright 2001-2010
 * 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>
#include <phy.h>

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(const char *base_name, int index,
				 uchar *enetaddr)
{
	char enetvar[32];
	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
	return eth_getenv_enetaddr(enetvar, enetaddr);
}

static int eth_mac_skip(int index)
{
	char enetvar[15];
	char *skip_state;
	sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
	return ((skip_state = getenv(enetvar)) != NULL);
}

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

	BUG_ON(devname == NULL);

	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);
}

static void eth_current_changed(void)
{
	char *act = getenv("ethact");
	/* update current ethernet name */
	if (eth_current) {
		if (act == NULL || strcmp(act, eth_current->name) != 0)
			setenv("ethact", eth_current->name);
	}
	/*
	 * remove the variable completely if there is no active
	 * interface
	 */
	else if (act != NULL)
		setenv("ethact", NULL);
}

int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
		   int eth_number)
{
	unsigned char env_enetaddr[6];
	int ret = 0;

	if (!eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr))
		return -1;

	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);
	}

	if (dev->write_hwaddr &&
		!eth_mac_skip(eth_number) &&
		is_valid_ether_addr(dev->enetaddr)) {
		ret = dev->write_hwaddr(dev);
	}

	return ret;
}

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

	assert(strlen(dev->name) < NAMESIZE);

	if (!eth_devices) {
		eth_current = eth_devices = dev;
		eth_current_changed();
	} 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)
{
	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

#ifdef CONFIG_PHYLIB
	phy_init();
#endif

	/*
	 * If board-specific initialization exists, call it.
	 * If not, call a CPU-specific one
	 */
	if (board_eth_init != __def_eth_init) {
		if (board_eth_init(bis) < 0)
			printf("Board Net Initialization Failed\n");
	} else if (cpu_eth_init != __def_eth_init) {
		if (cpu_eth_init(bis) < 0)
			printf("CPU Net Initialization Failed\n");
	} else
		printf("Net Initialization Skipped\n");

#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]");
			}

			if (strchr(dev->name, ' '))
				puts("\nWarning: eth device name has a space!\n");

			if (eth_write_hwaddr(dev, "eth", eth_number))
				puts("\nWarning: failed to set MAC address\n");

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

		eth_current_changed();
		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", 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;

	eth_current_changed();

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

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);
	}

	eth_current_changed();
}

char *eth_get_name (void)
{
	return (eth_current ? eth_current->name : "unknown");
}
Commit	Line	Data
c609719b	1	/*
aba4b69d	2	* (C) Copyright 2001-2010
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>
5f184715	28	#include <phy.h>
c609719b	29
3f6e6993 MF	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	56
7616e785 SG	57	int eth_getenv_enetaddr_by_index(const char *base_name, int index,
7616e785 SG	58	uchar *enetaddr)
86848a74 MF	59	{
86848a74 MF	60	char enetvar[32];
7616e785	61	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
86848a74 MF	62	return eth_getenv_enetaddr(enetvar, enetaddr);
86848a74 MF	63	}
3f6e6993	64
ecee9324 BW	65	static int eth_mac_skip(int index)
	66	{
	67	char enetvar[15];
	68	char *skip_state;
	69	sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
	70	return ((skip_state = getenv(enetvar)) != NULL);
	71	}
	72
dd35479a BW	73	/*
	74	* CPU and board-specific Ethernet initializations. Aliased function
	75	* signals caller to move on
	76	*/
	77	static int __def_eth_init(bd_t *bis)
	78	{
	79	return -1;
	80	}
f9a109b3 PT	81	int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
f9a109b3 PT	82	int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
dd35479a	83
3a473b2a WD	84	extern int mv6436x_eth_initialize(bd_t *);
3a473b2a WD	85	extern int mv6446x_eth_initialize(bd_t *);
c609719b	86
f85b6071 RJ	87	#ifdef CONFIG_API
	88	extern void (push_packet)(volatile void , int);
	89
	90	static struct {
	91	uchar data[PKTSIZE];
	92	int length;
	93	} eth_rcv_bufs[PKTBUFSRX];
	94
	95	static unsigned int eth_rcv_current = 0, eth_rcv_last = 0;
	96	#endif
	97
c609719b WD	98	static struct eth_device eth_devices, eth_current;
	99
	100	struct eth_device *eth_get_dev(void)
	101	{
	102	return eth_current;
	103	}
	104
d7fb9bcf	105	struct eth_device eth_get_dev_by_name(const char devname)
63ff004c MB	106	{
	107	struct eth_device dev, target_dev;
	108
7e7f903f HR	109	BUG_ON(devname == NULL);
7e7f903f HR	110
63ff004c MB	111	if (!eth_devices)
	112	return NULL;
	113
	114	dev = eth_devices;
	115	target_dev = NULL;
	116	do {
	117	if (strcmp(devname, dev->name) == 0) {
	118	target_dev = dev;
	119	break;
	120	}
	121	dev = dev->next;
	122	} while (dev != eth_devices);
	123
	124	return target_dev;
	125	}
	126
9e56986a AF	127	struct eth_device *eth_get_dev_by_index(int index)
	128	{
	129	struct eth_device dev, target_dev;
	130	int idx = 0;
	131
	132	if (!eth_devices)
	133	return NULL;
	134
	135	dev = eth_devices;
	136	target_dev = NULL;
	137	do {
	138	if (idx == index) {
	139	target_dev = dev;
	140	break;
	141	}
	142	dev = dev->next;
	143	idx++;
	144	} while (dev != eth_devices);
	145
	146	return target_dev;
	147	}
	148
c609719b WD	149	int eth_get_dev_index (void)
	150	{
	151	struct eth_device *dev;
	152	int num = 0;
	153
	154	if (!eth_devices) {
	155	return (-1);
	156	}
	157
	158	for (dev = eth_devices; dev; dev = dev->next) {
	159	if (dev == eth_current)
	160	break;
	161	++num;
	162	}
	163
	164	if (dev) {
	165	return (num);
	166	}
	167
	168	return (0);
	169	}
	170
89d48367	171	static void eth_current_changed(void)
c609719b	172	{
e2a53458 MF	173	char *act = getenv("ethact");
	174	/* update current ethernet name */
	175	if (eth_current) {
	176	if (act == NULL \|\| strcmp(act, eth_current->name) != 0)
	177	setenv("ethact", eth_current->name);
89d48367	178	}
e2a53458 MF	179	/*
	180	* remove the variable completely if there is no active
	181	* interface
	182	*/
	183	else if (act != NULL)
	184	setenv("ethact", NULL);
89d48367 SG	185	}
89d48367 SG	186
7616e785 SG	187	int eth_write_hwaddr(struct eth_device dev, const char base_name,
	188	int eth_number)
	189	{
	190	unsigned char env_enetaddr[6];
	191	int ret = 0;
	192
	193	if (!eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr))
	194	return -1;
	195
	196	if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
	197	if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
	198	memcmp(dev->enetaddr, env_enetaddr, 6)) {
	199	printf("\nWarning: %s MAC addresses don't match:\n",
	200	dev->name);
	201	printf("Address in SROM is %pM\n",
	202	dev->enetaddr);
	203	printf("Address in environment is %pM\n",
	204	env_enetaddr);
	205	}
	206
	207	memcpy(dev->enetaddr, env_enetaddr, 6);
	208	}
	209
	210	if (dev->write_hwaddr &&
	211	!eth_mac_skip(eth_number) &&
	212	is_valid_ether_addr(dev->enetaddr)) {
	213	ret = dev->write_hwaddr(dev);
	214	}
	215
	216	return ret;
	217	}
	218
89d48367 SG	219	int eth_register(struct eth_device *dev)
	220	{
	221	struct eth_device *d;
58c583b6	222
ff25d32c	223	assert(strlen(dev->name) < NAMESIZE);
58c583b6	224
89d48367 SG	225	if (!eth_devices) {
	226	eth_current = eth_devices = dev;
	227	eth_current_changed();
c609719b	228	} else {
aba4b69d DZ	229	for (d=eth_devices; d->next!=eth_devices; d=d->next)
aba4b69d DZ	230	;
c609719b WD	231	d->next = dev;
	232	}
	233
	234	dev->state = ETH_STATE_INIT;
	235	dev->next = eth_devices;
	236
	237	return 0;
	238	}
	239
	240	int eth_initialize(bd_t *bis)
	241	{
3f6e6993	242	int eth_number = 0;
c609719b WD	243
	244	eth_devices = NULL;
	245	eth_current = NULL;
	246
fad63407	247	show_boot_progress (64);
643d1ab2	248	#if defined(CONFIG_MII) \|\| defined(CONFIG_CMD_MII)
d9785c14 MB	249	miiphy_init();
d9785c14 MB	250	#endif
5f184715 AF	251
	252	#ifdef CONFIG_PHYLIB
	253	phy_init();
	254	#endif
	255
8ad25bf8 BW	256	/*
	257	* If board-specific initialization exists, call it.
	258	* If not, call a CPU-specific one
	259	*/
	260	if (board_eth_init != __def_eth_init) {
	261	if (board_eth_init(bis) < 0)
	262	printf("Board Net Initialization Failed\n");
	263	} else if (cpu_eth_init != __def_eth_init) {
	264	if (cpu_eth_init(bis) < 0)
	265	printf("CPU Net Initialization Failed\n");
	266	} else
	267	printf("Net Initialization Skipped\n");
d9785c14	268
1eac2a71	269	#if defined(CONFIG_DB64360) \|\| defined(CONFIG_CPCI750)
3a473b2a WD	270	mv6436x_eth_initialize(bis);
3a473b2a WD	271	#endif
1eac2a71	272	#if defined(CONFIG_DB64460) \|\| defined(CONFIG_P3Mx)
3a473b2a	273	mv6446x_eth_initialize(bis);
c68a05fe	274	#endif
c609719b WD	275	if (!eth_devices) {
c609719b WD	276	puts ("No ethernet found.\n");
fad63407	277	show_boot_progress (-64);
c609719b WD	278	} else {
	279	struct eth_device *dev = eth_devices;
	280	char *ethprime = getenv ("ethprime");
	281
fad63407	282	show_boot_progress (65);
c609719b WD	283	do {
	284	if (eth_number)
	285	puts (", ");
	286
	287	printf("%s", dev->name);
	288
	289	if (ethprime && strcmp (dev->name, ethprime) == 0) {
	290	eth_current = dev;
	291	puts (" [PRIME]");
	292	}
	293
1384f3bb MF	294	if (strchr(dev->name, ' '))
	295	puts("\nWarning: eth device name has a space!\n");
	296
019fd6d4	297	if (eth_write_hwaddr(dev, "eth", eth_number))
a9a730e0	298	puts("\nWarning: failed to set MAC address\n");
c609719b WD	299
	300	eth_number++;
	301	dev = dev->next;
	302	} while(dev != eth_devices);
	303
89d48367	304	eth_current_changed();
c609719b WD	305	putc ('\n');
	306	}
	307
	308	return eth_number;
	309	}
	310
53a5c424 DU	311	#ifdef CONFIG_MCAST_TFTP
	312	/* Multicast.
	313	* mcast_addr: multicast ipaddr from which multicast Mac is made
85eb5caf	314	* join: 1=join, 0=leave.
53a5c424 DU	315	*/
	316	int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
	317	{
	318	u8 mcast_mac[6];
85eb5caf	319	if (!eth_current \|\| !eth_current->mcast)
53a5c424 DU	320	return -1;
	321	mcast_mac[5] = htonl(mcast_ip) & 0xff;
	322	mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
	323	mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
	324	mcast_mac[2] = 0x5e;
	325	mcast_mac[1] = 0x0;
	326	mcast_mac[0] = 0x1;
	327	return eth_current->mcast(eth_current, mcast_mac, join);
	328	}
	329
85eb5caf WD	330	/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
85eb5caf WD	331	* and this is the ethernet-crc method needed for TSEC -- and perhaps
53a5c424 DU	332	* some other adapter -- hash tables
	333	*/
	334	#define CRCPOLY_LE 0xedb88320
	335	u32 ether_crc (size_t len, unsigned char const *p)
	336	{
	337	int i;
	338	u32 crc;
	339	crc = ~0;
	340	while (len--) {
	341	crc ^= *p++;
	342	for (i = 0; i < 8; i++)
	343	crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
	344	}
	345	/* an reverse the bits, cuz of way they arrive -- last-first */
	346	crc = (crc >> 16) \| (crc << 16);
	347	crc = (crc >> 8 & 0x00ff00ff) \| (crc << 8 & 0xff00ff00);
	348	crc = (crc >> 4 & 0x0f0f0f0f) \| (crc << 4 & 0xf0f0f0f0);
	349	crc = (crc >> 2 & 0x33333333) \| (crc << 2 & 0xcccccccc);
	350	crc = (crc >> 1 & 0x55555555) \| (crc << 1 & 0xaaaaaaaa);
	351	return crc;
	352	}
	353
	354	#endif
	355
c609719b WD	356
	357	int eth_init(bd_t *bis)
	358	{
86848a74 MF	359	int eth_number;
86848a74 MF	360	struct eth_device old_current, dev;
c609719b	361
6bc11388 SR	362	if (!eth_current) {
6bc11388 SR	363	puts ("No ethernet found.\n");
505be87a	364	return -1;
6bc11388	365	}
c609719b	366
86848a74 MF	367	/* Sync environment with network devices */
	368	eth_number = 0;
	369	dev = eth_devices;
	370	do {
	371	uchar env_enetaddr[6];
	372
7616e785 SG	373	if (eth_getenv_enetaddr_by_index("eth", eth_number,
7616e785 SG	374	env_enetaddr))
86848a74 MF	375	memcpy(dev->enetaddr, env_enetaddr, 6);
	376
	377	++eth_number;
	378	dev = dev->next;
	379	} while (dev != eth_devices);
	380
c609719b WD	381	old_current = eth_current;
c609719b WD	382	do {
0ebf04c6	383	debug("Trying %s\n", eth_current->name);
c609719b	384
422b1a01	385	if (eth_current->init(eth_current,bis) >= 0) {
c609719b WD	386	eth_current->state = ETH_STATE_ACTIVE;
c609719b WD	387
505be87a	388	return 0;
c609719b	389	}
0ebf04c6	390	debug("FAIL\n");
c609719b WD	391
	392	eth_try_another(0);
	393	} while (old_current != eth_current);
	394
505be87a	395	return -1;
c609719b WD	396	}
	397
	398	void eth_halt(void)
	399	{
	400	if (!eth_current)
	401	return;
	402
	403	eth_current->halt(eth_current);
	404
	405	eth_current->state = ETH_STATE_PASSIVE;
	406	}
	407
	408	int eth_send(volatile void *packet, int length)
	409	{
	410	if (!eth_current)
	411	return -1;
	412
	413	return eth_current->send(eth_current, packet, length);
	414	}
	415
	416	int eth_rx(void)
	417	{
	418	if (!eth_current)
	419	return -1;
	420
	421	return eth_current->recv(eth_current);
	422	}
	423
f85b6071 RJ	424	#ifdef CONFIG_API
	425	static void eth_save_packet(volatile void *packet, int length)
	426	{
	427	volatile char *p = packet;
	428	int i;
	429
	430	if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
	431	return;
	432
	433	if (PKTSIZE < length)
	434	return;
	435
	436	for (i = 0; i < length; i++)
	437	eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
	438
	439	eth_rcv_bufs[eth_rcv_last].length = length;
	440	eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
	441	}
	442
	443	int eth_receive(volatile void *packet, int length)
	444	{
	445	volatile char *p = packet;
	446	void *pp = push_packet;
	447	int i;
	448
	449	if (eth_rcv_current == eth_rcv_last) {
	450	push_packet = eth_save_packet;
	451	eth_rx();
	452	push_packet = pp;
	453
	454	if (eth_rcv_current == eth_rcv_last)
	455	return -1;
	456	}
	457
	458	if (length < eth_rcv_bufs[eth_rcv_current].length)
	459	return -1;
	460
	461	length = eth_rcv_bufs[eth_rcv_current].length;
	462
	463	for (i = 0; i < length; i++)
	464	p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
	465
	466	eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
	467	return length;
	468	}
	469	#endif /* CONFIG_API */
	470
c609719b WD	471	void eth_try_another(int first_restart)
	472	{
	473	static struct eth_device *first_failed = NULL;
c650e1be	474	char *ethrotate;
e1692577 MF	475
	476	/*
	477	* Do not rotate between network interfaces when
	478	* 'ethrotate' variable is set to 'no'.
	479	*/
	480	if (((ethrotate = getenv ("ethrotate")) != NULL) &&
	481	(strcmp(ethrotate, "no") == 0))
	482	return;
c609719b WD	483
	484	if (!eth_current)
	485	return;
	486
baac607c	487	if (first_restart) {
c609719b WD	488	first_failed = eth_current;
	489	}
	490
	491	eth_current = eth_current->next;
	492
89d48367	493	eth_current_changed();
a3d991bd	494
baac607c	495	if (first_failed == eth_current) {
c609719b WD	496	NetRestartWrap = 1;
	497	}
	498	}
	499
a3d991bd WD	500	void eth_set_current(void)
a3d991bd WD	501	{
da95427c HS	502	static char *act = NULL;
da95427c HS	503	static int env_changed_id = 0;
a3d991bd	504	struct eth_device* old_current;
2f70c49e	505	int env_id;
a3d991bd WD	506
	507	if (!eth_current) /* XXX no current */
	508	return;
	509
2f70c49e HS	510	env_id = get_env_id();
	511	if ((act == NULL) \|\| (env_changed_id != env_id)) {
	512	act = getenv("ethact");
	513	env_changed_id = env_id;
	514	}
a3d991bd WD	515	if (act != NULL) {
	516	old_current = eth_current;
	517	do {
	518	if (strcmp(eth_current->name, act) == 0)
	519	return;
	520	eth_current = eth_current->next;
	521	} while (old_current != eth_current);
	522	}
	523
89d48367	524	eth_current_changed();
a3d991bd	525	}
a3d991bd	526
5bb226e8 WD	527	char *eth_get_name (void)
	528	{
	529	return (eth_current ? eth_current->name : "unknown");
	530	}