[people/ms/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 inline int eth_setenv_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_setenv_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);
}

#ifdef CONFIG_RANDOM_MACADDR
void eth_random_enetaddr(uchar *enetaddr)
{
	uint32_t rval;

	srand(get_timer(0));

	rval = rand();
	enetaddr[0] = rval & 0xff;
	enetaddr[1] = (rval >> 8) & 0xff;
	enetaddr[2] = (rval >> 16) & 0xff;

	rval = rand();
	enetaddr[3] = rval & 0xff;
	enetaddr[4] = (rval >> 8) & 0xff;
	enetaddr[5] = (rval >> 16) & 0xff;

	/* make sure it's local and unicast */
	enetaddr[0] = (enetaddr[0] | 0x02) & ~0x01;
}
#endif

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

static unsigned int eth_rcv_current, eth_rcv_last;
#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;

	eth_getenv_enetaddr_by_index(base_name, 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);
	} else if (is_valid_ether_addr(dev->enetaddr)) {
		eth_setenv_enetaddr_by_index(base_name, eth_number,
					     dev->enetaddr);
		printf("\nWarning: %s using MAC address from net device\n",
			dev->name);
	}

	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;

	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;
}

static void eth_env_init(bd_t *bis)
{
	const char *s;

	if ((s = getenv("bootfile")) != NULL)
		copy_filename(BootFile, s, sizeof(BootFile));
}

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

	eth_env_init(bis);

	/*
	 * 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(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(void *packet, int length)
{
	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(void *packet, int length)
{
	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;
	char *ethrotate;

	/*
	 * Do not rotate between network interfaces when
	 * 'ethrotate' variable is set to 'no'.
	 */
	ethrotate = getenv("ethrotate");
	if ((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;
	static int  env_changed_id;
	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
154177e1	65	static inline int eth_setenv_enetaddr_by_index(const char *base_name, int index,
c88ef3c1 RH	66	uchar *enetaddr)
	67	{
	68	char enetvar[32];
	69	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
	70	return eth_setenv_enetaddr(enetvar, enetaddr);
	71	}
	72
	73
ecee9324 BW	74	static int eth_mac_skip(int index)
	75	{
	76	char enetvar[15];
	77	char *skip_state;
	78	sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
	79	return ((skip_state = getenv(enetvar)) != NULL);
	80	}
	81
03c1b04f MW	82	#ifdef CONFIG_RANDOM_MACADDR
	83	void eth_random_enetaddr(uchar *enetaddr)
	84	{
	85	uint32_t rval;
	86
	87	srand(get_timer(0));
	88
	89	rval = rand();
	90	enetaddr[0] = rval & 0xff;
	91	enetaddr[1] = (rval >> 8) & 0xff;
	92	enetaddr[2] = (rval >> 16) & 0xff;
	93
	94	rval = rand();
	95	enetaddr[3] = rval & 0xff;
	96	enetaddr[4] = (rval >> 8) & 0xff;
	97	enetaddr[5] = (rval >> 16) & 0xff;
	98
	99	/* make sure it's local and unicast */
	100	enetaddr[0] = (enetaddr[0] \| 0x02) & ~0x01;
	101	}
	102	#endif
	103
dd35479a BW	104	/*
	105	* CPU and board-specific Ethernet initializations. Aliased function
	106	* signals caller to move on
	107	*/
	108	static int __def_eth_init(bd_t *bis)
	109	{
	110	return -1;
	111	}
f9a109b3 PT	112	int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
f9a109b3 PT	113	int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
dd35479a	114
f85b6071	115	#ifdef CONFIG_API
f85b6071 RJ	116	static struct {
	117	uchar data[PKTSIZE];
	118	int length;
	119	} eth_rcv_bufs[PKTBUFSRX];
	120
66c7385a	121	static unsigned int eth_rcv_current, eth_rcv_last;
f85b6071 RJ	122	#endif
f85b6071 RJ	123
c609719b WD	124	static struct eth_device eth_devices, eth_current;
	125
	126	struct eth_device *eth_get_dev(void)
	127	{
	128	return eth_current;
	129	}
	130
d7fb9bcf	131	struct eth_device eth_get_dev_by_name(const char devname)
63ff004c MB	132	{
	133	struct eth_device dev, target_dev;
	134
7e7f903f HR	135	BUG_ON(devname == NULL);
7e7f903f HR	136
63ff004c MB	137	if (!eth_devices)
	138	return NULL;
	139
	140	dev = eth_devices;
	141	target_dev = NULL;
	142	do {
	143	if (strcmp(devname, dev->name) == 0) {
	144	target_dev = dev;
	145	break;
	146	}
	147	dev = dev->next;
	148	} while (dev != eth_devices);
	149
	150	return target_dev;
	151	}
	152
9e56986a AF	153	struct eth_device *eth_get_dev_by_index(int index)
	154	{
	155	struct eth_device dev, target_dev;
9e56986a AF	156
	157	if (!eth_devices)
	158	return NULL;
	159
	160	dev = eth_devices;
	161	target_dev = NULL;
	162	do {
fea7dcae	163	if (dev->index == index) {
9e56986a AF	164	target_dev = dev;
	165	break;
	166	}
	167	dev = dev->next;
9e56986a AF	168	} while (dev != eth_devices);
	169
	170	return target_dev;
	171	}
	172
66c7385a	173	int eth_get_dev_index(void)
c609719b	174	{
66c7385a	175	if (!eth_current)
fea7dcae	176	return -1;
c609719b	177
fea7dcae	178	return eth_current->index;
c609719b WD	179	}
c609719b WD	180
89d48367	181	static void eth_current_changed(void)
c609719b	182	{
e2a53458 MF	183	char *act = getenv("ethact");
	184	/* update current ethernet name */
	185	if (eth_current) {
	186	if (act == NULL \|\| strcmp(act, eth_current->name) != 0)
	187	setenv("ethact", eth_current->name);
89d48367	188	}
e2a53458 MF	189	/*
	190	* remove the variable completely if there is no active
	191	* interface
	192	*/
	193	else if (act != NULL)
	194	setenv("ethact", NULL);
89d48367 SG	195	}
89d48367 SG	196
7616e785 SG	197	int eth_write_hwaddr(struct eth_device dev, const char base_name,
	198	int eth_number)
	199	{
	200	unsigned char env_enetaddr[6];
	201	int ret = 0;
	202
69376644	203	eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
7616e785 SG	204
	205	if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
	206	if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
66c7385a	207	memcmp(dev->enetaddr, env_enetaddr, 6)) {
7616e785 SG	208	printf("\nWarning: %s MAC addresses don't match:\n",
	209	dev->name);
	210	printf("Address in SROM is %pM\n",
	211	dev->enetaddr);
	212	printf("Address in environment is %pM\n",
	213	env_enetaddr);
	214	}
	215
	216	memcpy(dev->enetaddr, env_enetaddr, 6);
c88ef3c1 RH	217	} else if (is_valid_ether_addr(dev->enetaddr)) {
	218	eth_setenv_enetaddr_by_index(base_name, eth_number,
	219	dev->enetaddr);
	220	printf("\nWarning: %s using MAC address from net device\n",
	221	dev->name);
7616e785 SG	222	}
	223
	224	if (dev->write_hwaddr &&
66c7385a JH	225	!eth_mac_skip(eth_number) &&
66c7385a JH	226	is_valid_ether_addr(dev->enetaddr))
7616e785	227	ret = dev->write_hwaddr(dev);
7616e785 SG	228
	229	return ret;
	230	}
	231
89d48367 SG	232	int eth_register(struct eth_device *dev)
	233	{
	234	struct eth_device *d;
66c7385a	235	static int index;
58c583b6	236
f6add132	237	assert(strlen(dev->name) < sizeof(dev->name));
58c583b6	238
89d48367 SG	239	if (!eth_devices) {
	240	eth_current = eth_devices = dev;
	241	eth_current_changed();
c609719b	242	} else {
66c7385a	243	for (d = eth_devices; d->next != eth_devices; d = d->next)
aba4b69d	244	;
c609719b WD	245	d->next = dev;
	246	}
	247
	248	dev->state = ETH_STATE_INIT;
	249	dev->next = eth_devices;
fea7dcae	250	dev->index = index++;
c609719b WD	251
	252	return 0;
	253	}
	254
e7e982d6 VP	255	int eth_unregister(struct eth_device *dev)
	256	{
	257	struct eth_device *cur;
	258
	259	/* No device */
	260	if (!eth_devices)
	261	return -1;
	262
	263	for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
	264	cur = cur->next)
	265	;
	266
	267	/* Device not found */
	268	if (cur->next != dev)
	269	return -1;
	270
	271	cur->next = dev->next;
	272
	273	if (eth_devices == dev)
	274	eth_devices = dev->next == eth_devices ? NULL : dev->next;
	275
	276	if (eth_current == dev) {
	277	eth_current = eth_devices;
	278	eth_current_changed();
	279	}
	280
	281	return 0;
	282	}
	283
de30122b MF	284	static void eth_env_init(bd_t *bis)
	285	{
	286	const char *s;
	287
	288	if ((s = getenv("bootfile")) != NULL)
	289	copy_filename(BootFile, s, sizeof(BootFile));
	290	}
	291
c609719b WD	292	int eth_initialize(bd_t *bis)
c609719b WD	293	{
fea7dcae	294	int num_devices = 0;
c609719b WD	295	eth_devices = NULL;
	296	eth_current = NULL;
	297
770605e4	298	bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
643d1ab2	299	#if defined(CONFIG_MII) \|\| defined(CONFIG_CMD_MII)
d9785c14 MB	300	miiphy_init();
d9785c14 MB	301	#endif
5f184715 AF	302
	303	#ifdef CONFIG_PHYLIB
	304	phy_init();
	305	#endif
	306
de30122b MF	307	eth_env_init(bis);
de30122b MF	308
8ad25bf8 BW	309	/*
	310	* If board-specific initialization exists, call it.
	311	* If not, call a CPU-specific one
	312	*/
	313	if (board_eth_init != __def_eth_init) {
	314	if (board_eth_init(bis) < 0)
	315	printf("Board Net Initialization Failed\n");
	316	} else if (cpu_eth_init != __def_eth_init) {
	317	if (cpu_eth_init(bis) < 0)
	318	printf("CPU Net Initialization Failed\n");
	319	} else
	320	printf("Net Initialization Skipped\n");
d9785c14	321
c609719b	322	if (!eth_devices) {
66c7385a	323	puts("No ethernet found.\n");
770605e4	324	bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
c609719b WD	325	} else {
c609719b WD	326	struct eth_device *dev = eth_devices;
66c7385a	327	char *ethprime = getenv("ethprime");
c609719b	328
770605e4	329	bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
c609719b	330	do {
fea7dcae	331	if (dev->index)
66c7385a	332	puts(", ");
c609719b WD	333
	334	printf("%s", dev->name);
	335
66c7385a	336	if (ethprime && strcmp(dev->name, ethprime) == 0) {
c609719b	337	eth_current = dev;
66c7385a	338	puts(" [PRIME]");
c609719b WD	339	}
c609719b WD	340
1384f3bb	341	if (strchr(dev->name, ' '))
66c7385a JH	342	puts("\nWarning: eth device name has a space!"
66c7385a JH	343	"\n");
1384f3bb	344
fea7dcae	345	if (eth_write_hwaddr(dev, "eth", dev->index))
a9a730e0	346	puts("\nWarning: failed to set MAC address\n");
c609719b	347
c609719b	348	dev = dev->next;
fea7dcae	349	num_devices++;
66c7385a	350	} while (dev != eth_devices);
c609719b	351
89d48367	352	eth_current_changed();
66c7385a	353	putc('\n');
c609719b WD	354	}
c609719b WD	355
fea7dcae	356	return num_devices;
c609719b WD	357	}
c609719b WD	358
53a5c424 DU	359	#ifdef CONFIG_MCAST_TFTP
	360	/* Multicast.
	361	* mcast_addr: multicast ipaddr from which multicast Mac is made
85eb5caf	362	* join: 1=join, 0=leave.
53a5c424	363	*/
66c7385a	364	int eth_mcast_join(IPaddr_t mcast_ip, u8 join)
53a5c424	365	{
66c7385a	366	u8 mcast_mac[6];
85eb5caf	367	if (!eth_current \|\| !eth_current->mcast)
53a5c424 DU	368	return -1;
	369	mcast_mac[5] = htonl(mcast_ip) & 0xff;
	370	mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
	371	mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
	372	mcast_mac[2] = 0x5e;
	373	mcast_mac[1] = 0x0;
	374	mcast_mac[0] = 0x1;
	375	return eth_current->mcast(eth_current, mcast_mac, join);
	376	}
	377
85eb5caf WD	378	/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
85eb5caf WD	379	* and this is the ethernet-crc method needed for TSEC -- and perhaps
53a5c424 DU	380	* some other adapter -- hash tables
	381	*/
	382	#define CRCPOLY_LE 0xedb88320
66c7385a	383	u32 ether_crc(size_t len, unsigned char const *p)
53a5c424 DU	384	{
	385	int i;
	386	u32 crc;
	387	crc = ~0;
	388	while (len--) {
	389	crc ^= *p++;
	390	for (i = 0; i < 8; i++)
	391	crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
	392	}
	393	/* an reverse the bits, cuz of way they arrive -- last-first */
	394	crc = (crc >> 16) \| (crc << 16);
	395	crc = (crc >> 8 & 0x00ff00ff) \| (crc << 8 & 0xff00ff00);
	396	crc = (crc >> 4 & 0x0f0f0f0f) \| (crc << 4 & 0xf0f0f0f0);
	397	crc = (crc >> 2 & 0x33333333) \| (crc << 2 & 0xcccccccc);
	398	crc = (crc >> 1 & 0x55555555) \| (crc << 1 & 0xaaaaaaaa);
	399	return crc;
	400	}
	401
	402	#endif
	403
c609719b WD	404
	405	int eth_init(bd_t *bis)
	406	{
86848a74	407	struct eth_device old_current, dev;
c609719b	408
6bc11388	409	if (!eth_current) {
66c7385a	410	puts("No ethernet found.\n");
505be87a	411	return -1;
6bc11388	412	}
c609719b	413
86848a74	414	/* Sync environment with network devices */
86848a74 MF	415	dev = eth_devices;
	416	do {
	417	uchar env_enetaddr[6];
	418
fea7dcae	419	if (eth_getenv_enetaddr_by_index("eth", dev->index,
7616e785	420	env_enetaddr))
86848a74 MF	421	memcpy(dev->enetaddr, env_enetaddr, 6);
86848a74 MF	422
86848a74 MF	423	dev = dev->next;
	424	} while (dev != eth_devices);
	425
c609719b WD	426	old_current = eth_current;
c609719b WD	427	do {
0ebf04c6	428	debug("Trying %s\n", eth_current->name);
c609719b	429
66c7385a	430	if (eth_current->init(eth_current, bis) >= 0) {
c609719b WD	431	eth_current->state = ETH_STATE_ACTIVE;
c609719b WD	432
505be87a	433	return 0;
c609719b	434	}
0ebf04c6	435	debug("FAIL\n");
c609719b WD	436
	437	eth_try_another(0);
	438	} while (old_current != eth_current);
	439
505be87a	440	return -1;
c609719b WD	441	}
	442
	443	void eth_halt(void)
	444	{
	445	if (!eth_current)
	446	return;
	447
	448	eth_current->halt(eth_current);
	449
	450	eth_current->state = ETH_STATE_PASSIVE;
	451	}
	452
db288a96	453	int eth_send(void *packet, int length)
c609719b WD	454	{
	455	if (!eth_current)
	456	return -1;
	457
	458	return eth_current->send(eth_current, packet, length);
	459	}
	460
	461	int eth_rx(void)
	462	{
	463	if (!eth_current)
	464	return -1;
	465
	466	return eth_current->recv(eth_current);
	467	}
	468
f85b6071	469	#ifdef CONFIG_API
db288a96	470	static void eth_save_packet(void *packet, int length)
f85b6071	471	{
db288a96	472	char *p = packet;
f85b6071 RJ	473	int i;
	474
	475	if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
	476	return;
	477
	478	if (PKTSIZE < length)
	479	return;
	480
	481	for (i = 0; i < length; i++)
	482	eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
	483
	484	eth_rcv_bufs[eth_rcv_last].length = length;
	485	eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
	486	}
	487
db288a96	488	int eth_receive(void *packet, int length)
f85b6071	489	{
db288a96	490	char *p = packet;
f85b6071 RJ	491	void *pp = push_packet;
	492	int i;
	493
	494	if (eth_rcv_current == eth_rcv_last) {
	495	push_packet = eth_save_packet;
	496	eth_rx();
	497	push_packet = pp;
	498
	499	if (eth_rcv_current == eth_rcv_last)
	500	return -1;
	501	}
	502
	503	if (length < eth_rcv_bufs[eth_rcv_current].length)
	504	return -1;
	505
	506	length = eth_rcv_bufs[eth_rcv_current].length;
	507
	508	for (i = 0; i < length; i++)
	509	p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
	510
	511	eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
	512	return length;
	513	}
	514	#endif /* CONFIG_API */
	515
c609719b WD	516	void eth_try_another(int first_restart)
c609719b WD	517	{
66c7385a	518	static struct eth_device *first_failed;
c650e1be	519	char *ethrotate;
e1692577 MF	520
	521	/*
	522	* Do not rotate between network interfaces when
	523	* 'ethrotate' variable is set to 'no'.
	524	*/
66c7385a JH	525	ethrotate = getenv("ethrotate");
66c7385a JH	526	if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
e1692577	527	return;
c609719b WD	528
	529	if (!eth_current)
	530	return;
	531
66c7385a	532	if (first_restart)
c609719b	533	first_failed = eth_current;
c609719b WD	534
	535	eth_current = eth_current->next;
	536
89d48367	537	eth_current_changed();
a3d991bd	538
66c7385a	539	if (first_failed == eth_current)
c609719b	540	NetRestartWrap = 1;
c609719b WD	541	}
c609719b WD	542
a3d991bd WD	543	void eth_set_current(void)
a3d991bd WD	544	{
66c7385a JH	545	static char *act;
	546	static int env_changed_id;
	547	struct eth_device *old_current;
2f70c49e	548	int env_id;
a3d991bd WD	549
	550	if (!eth_current) /* XXX no current */
	551	return;
	552
2f70c49e HS	553	env_id = get_env_id();
	554	if ((act == NULL) \|\| (env_changed_id != env_id)) {
	555	act = getenv("ethact");
	556	env_changed_id = env_id;
	557	}
a3d991bd WD	558	if (act != NULL) {
	559	old_current = eth_current;
	560	do {
	561	if (strcmp(eth_current->name, act) == 0)
	562	return;
	563	eth_current = eth_current->next;
	564	} while (old_current != eth_current);
	565	}
	566
89d48367	567	eth_current_changed();
a3d991bd	568	}
a3d991bd	569
66c7385a	570	char *eth_get_name(void)
5bb226e8	571	{
66c7385a	572	return eth_current ? eth_current->name : "unknown";
5bb226e8	573	}