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

/*
 * (C) Copyright 2001-2010
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <command.h>
#include <net.h>
#include <miiphy.h>
#include <phy.h>
#include <asm/errno.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);
}

/*
 * 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;
struct eth_device *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_address_set(unsigned char *addr)
{
	return memcmp(addr, "\0\0\0\0\0\0", 6);
}

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 (eth_address_set(env_enetaddr)) {
		if (eth_address_set(dev->enetaddr) &&
				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);
	} else if (!(eth_address_set(dev->enetaddr))) {
		printf("\nError: %s address not set.\n",
		       dev->name);
		return -EINVAL;
	}

	if (dev->write_hwaddr && !eth_mac_skip(eth_number)) {
		if (!is_valid_ether_addr(dev->enetaddr)) {
			printf("\nError: %s address %pM illegal value\n",
				 dev->name, dev->enetaddr);
			return -EINVAL;
		}

		ret = dev->write_hwaddr(dev);
		if (ret)
			printf("\nWarning: %s failed to set MAC address\n", dev->name);
	}

	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) || defined(CONFIG_PHYLIB)
	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");

			eth_write_hwaddr(dev, "eth", dev->index);

			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;
	}

	length = min(eth_rcv_bufs[eth_rcv_current].length, 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, [email protected].
c609719b WD	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
c609719b WD	6	*/
	7
	8	#include <common.h>
	9	#include <command.h>
	10	#include <net.h>
d9785c14	11	#include <miiphy.h>
5f184715	12	#include <phy.h>
75d9a45c	13	#include <asm/errno.h>
c609719b	14
3f6e6993 MF	15	void eth_parse_enetaddr(const char addr, uchar enetaddr)
	16	{
	17	char *end;
	18	int i;
	19
	20	for (i = 0; i < 6; ++i) {
	21	enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
	22	if (addr)
	23	addr = (*end) ? end + 1 : end;
	24	}
	25	}
	26
	27	int eth_getenv_enetaddr(char name, uchar enetaddr)
	28	{
	29	eth_parse_enetaddr(getenv(name), enetaddr);
	30	return is_valid_ether_addr(enetaddr);
	31	}
	32
	33	int eth_setenv_enetaddr(char name, const uchar enetaddr)
	34	{
	35	char buf[20];
	36
	37	sprintf(buf, "%pM", enetaddr);
	38
	39	return setenv(name, buf);
	40	}
86848a74	41
7616e785 SG	42	int eth_getenv_enetaddr_by_index(const char *base_name, int index,
7616e785 SG	43	uchar *enetaddr)
86848a74 MF	44	{
86848a74 MF	45	char enetvar[32];
7616e785	46	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
86848a74 MF	47	return eth_getenv_enetaddr(enetvar, enetaddr);
86848a74 MF	48	}
3f6e6993	49
154177e1	50	static inline int eth_setenv_enetaddr_by_index(const char *base_name, int index,
c88ef3c1 RH	51	uchar *enetaddr)
	52	{
	53	char enetvar[32];
	54	sprintf(enetvar, index ? "%s%daddr" : "%saddr", base_name, index);
	55	return eth_setenv_enetaddr(enetvar, enetaddr);
	56	}
	57
	58
ecee9324 BW	59	static int eth_mac_skip(int index)
	60	{
	61	char enetvar[15];
	62	char *skip_state;
	63	sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
	64	return ((skip_state = getenv(enetvar)) != NULL);
	65	}
	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
f85b6071	78	#ifdef CONFIG_API
f85b6071 RJ	79	static struct {
	80	uchar data[PKTSIZE];
	81	int length;
	82	} eth_rcv_bufs[PKTBUFSRX];
	83
66c7385a	84	static unsigned int eth_rcv_current, eth_rcv_last;
f85b6071 RJ	85	#endif
f85b6071 RJ	86
f8be7d65 JH	87	static struct eth_device *eth_devices;
f8be7d65 JH	88	struct eth_device *eth_current;
c609719b	89
d7fb9bcf	90	struct eth_device eth_get_dev_by_name(const char devname)
63ff004c MB	91	{
	92	struct eth_device dev, target_dev;
	93
7e7f903f HR	94	BUG_ON(devname == NULL);
7e7f903f HR	95
63ff004c MB	96	if (!eth_devices)
	97	return NULL;
	98
	99	dev = eth_devices;
	100	target_dev = NULL;
	101	do {
	102	if (strcmp(devname, dev->name) == 0) {
	103	target_dev = dev;
	104	break;
	105	}
	106	dev = dev->next;
	107	} while (dev != eth_devices);
	108
	109	return target_dev;
	110	}
	111
9e56986a AF	112	struct eth_device *eth_get_dev_by_index(int index)
	113	{
	114	struct eth_device dev, target_dev;
9e56986a AF	115
	116	if (!eth_devices)
	117	return NULL;
	118
	119	dev = eth_devices;
	120	target_dev = NULL;
	121	do {
fea7dcae	122	if (dev->index == index) {
9e56986a AF	123	target_dev = dev;
	124	break;
	125	}
	126	dev = dev->next;
9e56986a AF	127	} while (dev != eth_devices);
	128
	129	return target_dev;
	130	}
	131
66c7385a	132	int eth_get_dev_index(void)
c609719b	133	{
66c7385a	134	if (!eth_current)
fea7dcae	135	return -1;
c609719b	136
fea7dcae	137	return eth_current->index;
c609719b WD	138	}
c609719b WD	139
89d48367	140	static void eth_current_changed(void)
c609719b	141	{
e2a53458 MF	142	char *act = getenv("ethact");
	143	/* update current ethernet name */
	144	if (eth_current) {
	145	if (act == NULL \|\| strcmp(act, eth_current->name) != 0)
	146	setenv("ethact", eth_current->name);
89d48367	147	}
e2a53458 MF	148	/*
	149	* remove the variable completely if there is no active
	150	* interface
	151	*/
	152	else if (act != NULL)
	153	setenv("ethact", NULL);
89d48367 SG	154	}
89d48367 SG	155
75d9a45c PM	156	int eth_address_set(unsigned char *addr)
	157	{
	158	return memcmp(addr, "\0\0\0\0\0\0", 6);
	159	}
	160
7616e785 SG	161	int eth_write_hwaddr(struct eth_device dev, const char base_name,
	162	int eth_number)
	163	{
	164	unsigned char env_enetaddr[6];
	165	int ret = 0;
	166
69376644	167	eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
7616e785	168
75d9a45c PM	169	if (eth_address_set(env_enetaddr)) {
75d9a45c PM	170	if (eth_address_set(dev->enetaddr) &&
66c7385a	171	memcmp(dev->enetaddr, env_enetaddr, 6)) {
7616e785 SG	172	printf("\nWarning: %s MAC addresses don't match:\n",
	173	dev->name);
	174	printf("Address in SROM is %pM\n",
	175	dev->enetaddr);
	176	printf("Address in environment is %pM\n",
	177	env_enetaddr);
	178	}
	179
	180	memcpy(dev->enetaddr, env_enetaddr, 6);
c88ef3c1 RH	181	} else if (is_valid_ether_addr(dev->enetaddr)) {
	182	eth_setenv_enetaddr_by_index(base_name, eth_number,
	183	dev->enetaddr);
	184	printf("\nWarning: %s using MAC address from net device\n",
	185	dev->name);
75d9a45c PM	186	} else if (!(eth_address_set(dev->enetaddr))) {
	187	printf("\nError: %s address not set.\n",
	188	dev->name);
	189	return -EINVAL;
7616e785 SG	190	}
7616e785 SG	191
75d9a45c PM	192	if (dev->write_hwaddr && !eth_mac_skip(eth_number)) {
	193	if (!is_valid_ether_addr(dev->enetaddr)) {
	194	printf("\nError: %s address %pM illegal value\n",
	195	dev->name, dev->enetaddr);
	196	return -EINVAL;
	197	}
460f949f	198
7616e785	199	ret = dev->write_hwaddr(dev);
75d9a45c PM	200	if (ret)
75d9a45c PM	201	printf("\nWarning: %s failed to set MAC address\n", dev->name);
460f949f	202	}
7616e785 SG	203
	204	return ret;
	205	}
	206
89d48367 SG	207	int eth_register(struct eth_device *dev)
	208	{
	209	struct eth_device *d;
66c7385a	210	static int index;
58c583b6	211
f6add132	212	assert(strlen(dev->name) < sizeof(dev->name));
58c583b6	213
89d48367 SG	214	if (!eth_devices) {
	215	eth_current = eth_devices = dev;
	216	eth_current_changed();
c609719b	217	} else {
66c7385a	218	for (d = eth_devices; d->next != eth_devices; d = d->next)
aba4b69d	219	;
c609719b WD	220	d->next = dev;
	221	}
	222
	223	dev->state = ETH_STATE_INIT;
	224	dev->next = eth_devices;
fea7dcae	225	dev->index = index++;
c609719b WD	226
	227	return 0;
	228	}
	229
e7e982d6 VP	230	int eth_unregister(struct eth_device *dev)
	231	{
	232	struct eth_device *cur;
	233
	234	/* No device */
	235	if (!eth_devices)
	236	return -1;
	237
	238	for (cur = eth_devices; cur->next != eth_devices && cur->next != dev;
	239	cur = cur->next)
	240	;
	241
	242	/* Device not found */
	243	if (cur->next != dev)
	244	return -1;
	245
	246	cur->next = dev->next;
	247
	248	if (eth_devices == dev)
	249	eth_devices = dev->next == eth_devices ? NULL : dev->next;
	250
	251	if (eth_current == dev) {
	252	eth_current = eth_devices;
	253	eth_current_changed();
	254	}
	255
	256	return 0;
	257	}
	258
de30122b MF	259	static void eth_env_init(bd_t *bis)
	260	{
	261	const char *s;
	262
	263	if ((s = getenv("bootfile")) != NULL)
	264	copy_filename(BootFile, s, sizeof(BootFile));
	265	}
	266
c609719b WD	267	int eth_initialize(bd_t *bis)
c609719b WD	268	{
fea7dcae	269	int num_devices = 0;
c609719b WD	270	eth_devices = NULL;
	271	eth_current = NULL;
	272
770605e4	273	bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
27ee59af	274	#if defined(CONFIG_MII) \|\| defined(CONFIG_CMD_MII) \|\| defined(CONFIG_PHYLIB)
d9785c14 MB	275	miiphy_init();
d9785c14 MB	276	#endif
5f184715 AF	277
	278	#ifdef CONFIG_PHYLIB
	279	phy_init();
	280	#endif
	281
de30122b MF	282	eth_env_init(bis);
de30122b MF	283
8ad25bf8 BW	284	/*
	285	* If board-specific initialization exists, call it.
	286	* If not, call a CPU-specific one
	287	*/
	288	if (board_eth_init != __def_eth_init) {
	289	if (board_eth_init(bis) < 0)
	290	printf("Board Net Initialization Failed\n");
	291	} else if (cpu_eth_init != __def_eth_init) {
	292	if (cpu_eth_init(bis) < 0)
	293	printf("CPU Net Initialization Failed\n");
	294	} else
	295	printf("Net Initialization Skipped\n");
d9785c14	296
c609719b	297	if (!eth_devices) {
66c7385a	298	puts("No ethernet found.\n");
770605e4	299	bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
c609719b WD	300	} else {
c609719b WD	301	struct eth_device *dev = eth_devices;
66c7385a	302	char *ethprime = getenv("ethprime");
c609719b	303
770605e4	304	bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
c609719b	305	do {
fea7dcae	306	if (dev->index)
66c7385a	307	puts(", ");
c609719b WD	308
	309	printf("%s", dev->name);
	310
66c7385a	311	if (ethprime && strcmp(dev->name, ethprime) == 0) {
c609719b	312	eth_current = dev;
66c7385a	313	puts(" [PRIME]");
c609719b WD	314	}
c609719b WD	315
1384f3bb	316	if (strchr(dev->name, ' '))
66c7385a JH	317	puts("\nWarning: eth device name has a space!"
66c7385a JH	318	"\n");
1384f3bb	319
75d9a45c	320	eth_write_hwaddr(dev, "eth", dev->index);
c609719b	321
c609719b	322	dev = dev->next;
fea7dcae	323	num_devices++;
66c7385a	324	} while (dev != eth_devices);
c609719b	325
89d48367	326	eth_current_changed();
66c7385a	327	putc('\n');
c609719b WD	328	}
c609719b WD	329
fea7dcae	330	return num_devices;
c609719b WD	331	}
c609719b WD	332
53a5c424 DU	333	#ifdef CONFIG_MCAST_TFTP
	334	/* Multicast.
	335	* mcast_addr: multicast ipaddr from which multicast Mac is made
85eb5caf	336	* join: 1=join, 0=leave.
53a5c424	337	*/
66c7385a	338	int eth_mcast_join(IPaddr_t mcast_ip, u8 join)
53a5c424	339	{
66c7385a	340	u8 mcast_mac[6];
85eb5caf	341	if (!eth_current \|\| !eth_current->mcast)
53a5c424 DU	342	return -1;
	343	mcast_mac[5] = htonl(mcast_ip) & 0xff;
	344	mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
	345	mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
	346	mcast_mac[2] = 0x5e;
	347	mcast_mac[1] = 0x0;
	348	mcast_mac[0] = 0x1;
	349	return eth_current->mcast(eth_current, mcast_mac, join);
	350	}
	351
85eb5caf WD	352	/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
85eb5caf WD	353	* and this is the ethernet-crc method needed for TSEC -- and perhaps
53a5c424 DU	354	* some other adapter -- hash tables
	355	*/
	356	#define CRCPOLY_LE 0xedb88320
66c7385a	357	u32 ether_crc(size_t len, unsigned char const *p)
53a5c424 DU	358	{
	359	int i;
	360	u32 crc;
	361	crc = ~0;
	362	while (len--) {
	363	crc ^= *p++;
	364	for (i = 0; i < 8; i++)
	365	crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
	366	}
	367	/* an reverse the bits, cuz of way they arrive -- last-first */
	368	crc = (crc >> 16) \| (crc << 16);
	369	crc = (crc >> 8 & 0x00ff00ff) \| (crc << 8 & 0xff00ff00);
	370	crc = (crc >> 4 & 0x0f0f0f0f) \| (crc << 4 & 0xf0f0f0f0);
	371	crc = (crc >> 2 & 0x33333333) \| (crc << 2 & 0xcccccccc);
	372	crc = (crc >> 1 & 0x55555555) \| (crc << 1 & 0xaaaaaaaa);
	373	return crc;
	374	}
	375
	376	#endif
	377
c609719b WD	378
	379	int eth_init(bd_t *bis)
	380	{
86848a74	381	struct eth_device old_current, dev;
c609719b	382
6bc11388	383	if (!eth_current) {
66c7385a	384	puts("No ethernet found.\n");
505be87a	385	return -1;
6bc11388	386	}
c609719b	387
86848a74	388	/* Sync environment with network devices */
86848a74 MF	389	dev = eth_devices;
	390	do {
	391	uchar env_enetaddr[6];
	392
fea7dcae	393	if (eth_getenv_enetaddr_by_index("eth", dev->index,
7616e785	394	env_enetaddr))
86848a74 MF	395	memcpy(dev->enetaddr, env_enetaddr, 6);
86848a74 MF	396
86848a74 MF	397	dev = dev->next;
	398	} while (dev != eth_devices);
	399
c609719b WD	400	old_current = eth_current;
c609719b WD	401	do {
0ebf04c6	402	debug("Trying %s\n", eth_current->name);
c609719b	403
66c7385a	404	if (eth_current->init(eth_current, bis) >= 0) {
c609719b WD	405	eth_current->state = ETH_STATE_ACTIVE;
c609719b WD	406
505be87a	407	return 0;
c609719b	408	}
0ebf04c6	409	debug("FAIL\n");
c609719b WD	410
	411	eth_try_another(0);
	412	} while (old_current != eth_current);
	413
505be87a	414	return -1;
c609719b WD	415	}
	416
	417	void eth_halt(void)
	418	{
	419	if (!eth_current)
	420	return;
	421
	422	eth_current->halt(eth_current);
	423
	424	eth_current->state = ETH_STATE_PASSIVE;
	425	}
	426
db288a96	427	int eth_send(void *packet, int length)
c609719b WD	428	{
	429	if (!eth_current)
	430	return -1;
	431
	432	return eth_current->send(eth_current, packet, length);
	433	}
	434
	435	int eth_rx(void)
	436	{
	437	if (!eth_current)
	438	return -1;
	439
	440	return eth_current->recv(eth_current);
	441	}
	442
f85b6071	443	#ifdef CONFIG_API
db288a96	444	static void eth_save_packet(void *packet, int length)
f85b6071	445	{
db288a96	446	char *p = packet;
f85b6071 RJ	447	int i;
	448
	449	if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
	450	return;
	451
	452	if (PKTSIZE < length)
	453	return;
	454
	455	for (i = 0; i < length; i++)
	456	eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
	457
	458	eth_rcv_bufs[eth_rcv_last].length = length;
	459	eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
	460	}
	461
db288a96	462	int eth_receive(void *packet, int length)
f85b6071	463	{
db288a96	464	char *p = packet;
f85b6071 RJ	465	void *pp = push_packet;
	466	int i;
	467
	468	if (eth_rcv_current == eth_rcv_last) {
	469	push_packet = eth_save_packet;
	470	eth_rx();
	471	push_packet = pp;
	472
	473	if (eth_rcv_current == eth_rcv_last)
	474	return -1;
	475	}
	476
46c07bcf	477	length = min(eth_rcv_bufs[eth_rcv_current].length, length);
f85b6071 RJ	478
	479	for (i = 0; i < length; i++)
	480	p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
	481
	482	eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
	483	return length;
	484	}
	485	#endif /* CONFIG_API */
	486
c609719b WD	487	void eth_try_another(int first_restart)
c609719b WD	488	{
66c7385a	489	static struct eth_device *first_failed;
c650e1be	490	char *ethrotate;
e1692577 MF	491
	492	/*
	493	* Do not rotate between network interfaces when
	494	* 'ethrotate' variable is set to 'no'.
	495	*/
66c7385a JH	496	ethrotate = getenv("ethrotate");
66c7385a JH	497	if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
e1692577	498	return;
c609719b WD	499
	500	if (!eth_current)
	501	return;
	502
66c7385a	503	if (first_restart)
c609719b	504	first_failed = eth_current;
c609719b WD	505
	506	eth_current = eth_current->next;
	507
89d48367	508	eth_current_changed();
a3d991bd	509
66c7385a	510	if (first_failed == eth_current)
c609719b	511	NetRestartWrap = 1;
c609719b WD	512	}
c609719b WD	513
a3d991bd WD	514	void eth_set_current(void)
a3d991bd WD	515	{
66c7385a JH	516	static char *act;
	517	static int env_changed_id;
	518	struct eth_device *old_current;
2f70c49e	519	int env_id;
a3d991bd WD	520
	521	if (!eth_current) /* XXX no current */
	522	return;
	523
2f70c49e HS	524	env_id = get_env_id();
	525	if ((act == NULL) \|\| (env_changed_id != env_id)) {
	526	act = getenv("ethact");
	527	env_changed_id = env_id;
	528	}
a3d991bd WD	529	if (act != NULL) {
	530	old_current = eth_current;
	531	do {
	532	if (strcmp(eth_current->name, act) == 0)
	533	return;
	534	eth_current = eth_current->next;
	535	} while (old_current != eth_current);
	536	}
	537
89d48367	538	eth_current_changed();
a3d991bd	539	}
a3d991bd	540
66c7385a	541	char *eth_get_name(void)
5bb226e8	542	{
66c7385a	543	return eth_current ? eth_current->name : "unknown";
5bb226e8	544	}