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

/*
 * (C) Copyright 2001-2010
 * 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>
#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")));

#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;

	if (!eth_devices)
		return NULL;

	dev = eth_devices;
	target_dev = NULL;
	do {
		if (dev->index == index) {
			target_dev = dev;
			break;
		}
		dev = dev->next;
	} while (dev != eth_devices);

	return target_dev;
}

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

	return eth_current->index;
}

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;
	static int index = 0;

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

	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;
	dev->index = index++;

	return 0;
}

int eth_unregister(struct eth_device *dev)
{
	struct eth_device *cur;

	/* No device */
	if (!eth_devices)
		return -1;

	for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
	     cur = cur->next)
		;

	/* Device not found */
	if (cur->next != dev)
		return -1;

	cur->next = dev->next;

	if (eth_devices == dev)
		eth_devices = dev->next == eth_devices ? NULL : dev->next;

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

	return 0;
}

int eth_initialize(bd_t *bis)
{
	int num_devices = 0;
	eth_devices = NULL;
	eth_current = NULL;

	bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
#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 (!eth_devices) {
		puts ("No ethernet found.\n");
		bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
	} else {
		struct eth_device *dev = eth_devices;
		char *ethprime = getenv ("ethprime");

		bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
		do {
			if (dev->index)
				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", dev->index))
				puts("\nWarning: failed to set MAC address\n");

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

		eth_current_changed();
		putc ('\n');
	}

	return num_devices;
}

#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, *dev;

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

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

		if (eth_getenv_enetaddr_by_index("eth", dev->index,
						 env_enetaddr))
			memcpy(dev->enetaddr, env_enetaddr, 6);

		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, [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>
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
f85b6071 RJ	84	#ifdef CONFIG_API
	85	extern void (push_packet)(volatile void , int);
	86
	87	static struct {
	88	uchar data[PKTSIZE];
	89	int length;
	90	} eth_rcv_bufs[PKTBUFSRX];
	91
	92	static unsigned int eth_rcv_current = 0, eth_rcv_last = 0;
	93	#endif
	94
c609719b WD	95	static struct eth_device eth_devices, eth_current;
	96
	97	struct eth_device *eth_get_dev(void)
	98	{
	99	return eth_current;
	100	}
	101
d7fb9bcf	102	struct eth_device eth_get_dev_by_name(const char devname)
63ff004c MB	103	{
	104	struct eth_device dev, target_dev;
	105
7e7f903f HR	106	BUG_ON(devname == NULL);
7e7f903f HR	107
63ff004c MB	108	if (!eth_devices)
	109	return NULL;
	110
	111	dev = eth_devices;
	112	target_dev = NULL;
	113	do {
	114	if (strcmp(devname, dev->name) == 0) {
	115	target_dev = dev;
	116	break;
	117	}
	118	dev = dev->next;
	119	} while (dev != eth_devices);
	120
	121	return target_dev;
	122	}
	123
9e56986a AF	124	struct eth_device *eth_get_dev_by_index(int index)
	125	{
	126	struct eth_device dev, target_dev;
9e56986a AF	127
	128	if (!eth_devices)
	129	return NULL;
	130
	131	dev = eth_devices;
	132	target_dev = NULL;
	133	do {
fea7dcae	134	if (dev->index == index) {
9e56986a AF	135	target_dev = dev;
	136	break;
	137	}
	138	dev = dev->next;
9e56986a AF	139	} while (dev != eth_devices);
	140
	141	return target_dev;
	142	}
	143
c609719b WD	144	int eth_get_dev_index (void)
c609719b WD	145	{
fea7dcae MW	146	if (!eth_current) {
fea7dcae MW	147	return -1;
c609719b WD	148	}
c609719b WD	149
fea7dcae	150	return eth_current->index;
c609719b WD	151	}
c609719b WD	152
89d48367	153	static void eth_current_changed(void)
c609719b	154	{
e2a53458 MF	155	char *act = getenv("ethact");
	156	/* update current ethernet name */
	157	if (eth_current) {
	158	if (act == NULL \|\| strcmp(act, eth_current->name) != 0)
	159	setenv("ethact", eth_current->name);
89d48367	160	}
e2a53458 MF	161	/*
	162	* remove the variable completely if there is no active
	163	* interface
	164	*/
	165	else if (act != NULL)
	166	setenv("ethact", NULL);
89d48367 SG	167	}
89d48367 SG	168
7616e785 SG	169	int eth_write_hwaddr(struct eth_device dev, const char base_name,
	170	int eth_number)
	171	{
	172	unsigned char env_enetaddr[6];
	173	int ret = 0;
	174
	175	if (!eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr))
	176	return -1;
	177
	178	if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
	179	if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
	180	memcmp(dev->enetaddr, env_enetaddr, 6)) {
	181	printf("\nWarning: %s MAC addresses don't match:\n",
	182	dev->name);
	183	printf("Address in SROM is %pM\n",
	184	dev->enetaddr);
	185	printf("Address in environment is %pM\n",
	186	env_enetaddr);
	187	}
	188
	189	memcpy(dev->enetaddr, env_enetaddr, 6);
	190	}
	191
	192	if (dev->write_hwaddr &&
	193	!eth_mac_skip(eth_number) &&
	194	is_valid_ether_addr(dev->enetaddr)) {
	195	ret = dev->write_hwaddr(dev);
	196	}
	197
	198	return ret;
	199	}
	200
89d48367 SG	201	int eth_register(struct eth_device *dev)
	202	{
	203	struct eth_device *d;
fea7dcae	204	static int index = 0;
58c583b6	205
f6add132	206	assert(strlen(dev->name) < sizeof(dev->name));
58c583b6	207
89d48367 SG	208	if (!eth_devices) {
	209	eth_current = eth_devices = dev;
	210	eth_current_changed();
c609719b	211	} else {
aba4b69d DZ	212	for (d=eth_devices; d->next!=eth_devices; d=d->next)
aba4b69d DZ	213	;
c609719b WD	214	d->next = dev;
	215	}
	216
	217	dev->state = ETH_STATE_INIT;
	218	dev->next = eth_devices;
fea7dcae	219	dev->index = index++;
c609719b WD	220
	221	return 0;
	222	}
	223
e7e982d6 VP	224	int eth_unregister(struct eth_device *dev)
	225	{
	226	struct eth_device *cur;
	227
	228	/* No device */
	229	if (!eth_devices)
	230	return -1;
	231
	232	for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
	233	cur = cur->next)
	234	;
	235
	236	/* Device not found */
	237	if (cur->next != dev)
	238	return -1;
	239
	240	cur->next = dev->next;
	241
	242	if (eth_devices == dev)
	243	eth_devices = dev->next == eth_devices ? NULL : dev->next;
	244
	245	if (eth_current == dev) {
	246	eth_current = eth_devices;
	247	eth_current_changed();
	248	}
	249
	250	return 0;
	251	}
	252
c609719b WD	253	int eth_initialize(bd_t *bis)
c609719b WD	254	{
fea7dcae	255	int num_devices = 0;
c609719b WD	256	eth_devices = NULL;
	257	eth_current = NULL;
	258
770605e4	259	bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
643d1ab2	260	#if defined(CONFIG_MII) \|\| defined(CONFIG_CMD_MII)
d9785c14 MB	261	miiphy_init();
d9785c14 MB	262	#endif
5f184715 AF	263
	264	#ifdef CONFIG_PHYLIB
	265	phy_init();
	266	#endif
	267
8ad25bf8 BW	268	/*
	269	* If board-specific initialization exists, call it.
	270	* If not, call a CPU-specific one
	271	*/
	272	if (board_eth_init != __def_eth_init) {
	273	if (board_eth_init(bis) < 0)
	274	printf("Board Net Initialization Failed\n");
	275	} else if (cpu_eth_init != __def_eth_init) {
	276	if (cpu_eth_init(bis) < 0)
	277	printf("CPU Net Initialization Failed\n");
	278	} else
	279	printf("Net Initialization Skipped\n");
d9785c14	280
c609719b WD	281	if (!eth_devices) {
c609719b WD	282	puts ("No ethernet found.\n");
770605e4	283	bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
c609719b WD	284	} else {
	285	struct eth_device *dev = eth_devices;
	286	char *ethprime = getenv ("ethprime");
	287
770605e4	288	bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
c609719b	289	do {
fea7dcae	290	if (dev->index)
c609719b WD	291	puts (", ");
	292
	293	printf("%s", dev->name);
	294
	295	if (ethprime && strcmp (dev->name, ethprime) == 0) {
	296	eth_current = dev;
	297	puts (" [PRIME]");
	298	}
	299
1384f3bb MF	300	if (strchr(dev->name, ' '))
	301	puts("\nWarning: eth device name has a space!\n");
	302
fea7dcae	303	if (eth_write_hwaddr(dev, "eth", dev->index))
a9a730e0	304	puts("\nWarning: failed to set MAC address\n");
c609719b	305
c609719b	306	dev = dev->next;
fea7dcae	307	num_devices++;
c609719b WD	308	} while(dev != eth_devices);
c609719b WD	309
89d48367	310	eth_current_changed();
c609719b WD	311	putc ('\n');
	312	}
	313
fea7dcae	314	return num_devices;
c609719b WD	315	}
c609719b WD	316
53a5c424 DU	317	#ifdef CONFIG_MCAST_TFTP
	318	/* Multicast.
	319	* mcast_addr: multicast ipaddr from which multicast Mac is made
85eb5caf	320	* join: 1=join, 0=leave.
53a5c424 DU	321	*/
	322	int eth_mcast_join( IPaddr_t mcast_ip, u8 join)
	323	{
	324	u8 mcast_mac[6];
85eb5caf	325	if (!eth_current \|\| !eth_current->mcast)
53a5c424 DU	326	return -1;
	327	mcast_mac[5] = htonl(mcast_ip) & 0xff;
	328	mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
	329	mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
	330	mcast_mac[2] = 0x5e;
	331	mcast_mac[1] = 0x0;
	332	mcast_mac[0] = 0x1;
	333	return eth_current->mcast(eth_current, mcast_mac, join);
	334	}
	335
85eb5caf WD	336	/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
85eb5caf WD	337	* and this is the ethernet-crc method needed for TSEC -- and perhaps
53a5c424 DU	338	* some other adapter -- hash tables
	339	*/
	340	#define CRCPOLY_LE 0xedb88320
	341	u32 ether_crc (size_t len, unsigned char const *p)
	342	{
	343	int i;
	344	u32 crc;
	345	crc = ~0;
	346	while (len--) {
	347	crc ^= *p++;
	348	for (i = 0; i < 8; i++)
	349	crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
	350	}
	351	/* an reverse the bits, cuz of way they arrive -- last-first */
	352	crc = (crc >> 16) \| (crc << 16);
	353	crc = (crc >> 8 & 0x00ff00ff) \| (crc << 8 & 0xff00ff00);
	354	crc = (crc >> 4 & 0x0f0f0f0f) \| (crc << 4 & 0xf0f0f0f0);
	355	crc = (crc >> 2 & 0x33333333) \| (crc << 2 & 0xcccccccc);
	356	crc = (crc >> 1 & 0x55555555) \| (crc << 1 & 0xaaaaaaaa);
	357	return crc;
	358	}
	359
	360	#endif
	361
c609719b WD	362
	363	int eth_init(bd_t *bis)
	364	{
86848a74	365	struct eth_device old_current, dev;
c609719b	366
6bc11388 SR	367	if (!eth_current) {
6bc11388 SR	368	puts ("No ethernet found.\n");
505be87a	369	return -1;
6bc11388	370	}
c609719b	371
86848a74	372	/* Sync environment with network devices */
86848a74 MF	373	dev = eth_devices;
	374	do {
	375	uchar env_enetaddr[6];
	376
fea7dcae	377	if (eth_getenv_enetaddr_by_index("eth", dev->index,
7616e785	378	env_enetaddr))
86848a74 MF	379	memcpy(dev->enetaddr, env_enetaddr, 6);
86848a74 MF	380
86848a74 MF	381	dev = dev->next;
	382	} while (dev != eth_devices);
	383
c609719b WD	384	old_current = eth_current;
c609719b WD	385	do {
0ebf04c6	386	debug("Trying %s\n", eth_current->name);
c609719b	387
422b1a01	388	if (eth_current->init(eth_current,bis) >= 0) {
c609719b WD	389	eth_current->state = ETH_STATE_ACTIVE;
c609719b WD	390
505be87a	391	return 0;
c609719b	392	}
0ebf04c6	393	debug("FAIL\n");
c609719b WD	394
	395	eth_try_another(0);
	396	} while (old_current != eth_current);
	397
505be87a	398	return -1;
c609719b WD	399	}
	400
	401	void eth_halt(void)
	402	{
	403	if (!eth_current)
	404	return;
	405
	406	eth_current->halt(eth_current);
	407
	408	eth_current->state = ETH_STATE_PASSIVE;
	409	}
	410
	411	int eth_send(volatile void *packet, int length)
	412	{
	413	if (!eth_current)
	414	return -1;
	415
	416	return eth_current->send(eth_current, packet, length);
	417	}
	418
	419	int eth_rx(void)
	420	{
	421	if (!eth_current)
	422	return -1;
	423
	424	return eth_current->recv(eth_current);
	425	}
	426
f85b6071 RJ	427	#ifdef CONFIG_API
	428	static void eth_save_packet(volatile void *packet, int length)
	429	{
	430	volatile char *p = packet;
	431	int i;
	432
	433	if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
	434	return;
	435
	436	if (PKTSIZE < length)
	437	return;
	438
	439	for (i = 0; i < length; i++)
	440	eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
	441
	442	eth_rcv_bufs[eth_rcv_last].length = length;
	443	eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
	444	}
	445
	446	int eth_receive(volatile void *packet, int length)
	447	{
	448	volatile char *p = packet;
	449	void *pp = push_packet;
	450	int i;
	451
	452	if (eth_rcv_current == eth_rcv_last) {
	453	push_packet = eth_save_packet;
	454	eth_rx();
	455	push_packet = pp;
	456
	457	if (eth_rcv_current == eth_rcv_last)
	458	return -1;
	459	}
	460
	461	if (length < eth_rcv_bufs[eth_rcv_current].length)
	462	return -1;
	463
	464	length = eth_rcv_bufs[eth_rcv_current].length;
	465
	466	for (i = 0; i < length; i++)
	467	p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
	468
	469	eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
	470	return length;
	471	}
	472	#endif /* CONFIG_API */
	473
c609719b WD	474	void eth_try_another(int first_restart)
	475	{
	476	static struct eth_device *first_failed = NULL;
c650e1be	477	char *ethrotate;
e1692577 MF	478
	479	/*
	480	* Do not rotate between network interfaces when
	481	* 'ethrotate' variable is set to 'no'.
	482	*/
	483	if (((ethrotate = getenv ("ethrotate")) != NULL) &&
	484	(strcmp(ethrotate, "no") == 0))
	485	return;
c609719b WD	486
	487	if (!eth_current)
	488	return;
	489
baac607c	490	if (first_restart) {
c609719b WD	491	first_failed = eth_current;
	492	}
	493
	494	eth_current = eth_current->next;
	495
89d48367	496	eth_current_changed();
a3d991bd	497
baac607c	498	if (first_failed == eth_current) {
c609719b WD	499	NetRestartWrap = 1;
	500	}
	501	}
	502
a3d991bd WD	503	void eth_set_current(void)
a3d991bd WD	504	{
da95427c HS	505	static char *act = NULL;
da95427c HS	506	static int env_changed_id = 0;
a3d991bd	507	struct eth_device* old_current;
2f70c49e	508	int env_id;
a3d991bd WD	509
	510	if (!eth_current) /* XXX no current */
	511	return;
	512
2f70c49e HS	513	env_id = get_env_id();
	514	if ((act == NULL) \|\| (env_changed_id != env_id)) {
	515	act = getenv("ethact");
	516	env_changed_id = env_id;
	517	}
a3d991bd WD	518	if (act != NULL) {
	519	old_current = eth_current;
	520	do {
	521	if (strcmp(eth_current->name, act) == 0)
	522	return;
	523	eth_current = eth_current->next;
	524	} while (old_current != eth_current);
	525	}
	526
89d48367	527	eth_current_changed();
a3d991bd	528	}
a3d991bd	529
5bb226e8 WD	530	char *eth_get_name (void)
	531	{
	532	return (eth_current ? eth_current->name : "unknown");
	533	}