[people/ms/u-boot.git] / net / eth.c

/*
 * (C) Copyright 2001-2010
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * 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 void eth_env_init(void)
{
	const char *s;

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

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);
}

static void eth_current_changed(void);

/*
 * 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;

static void eth_set_current_to_next(void)
{
	eth_current = eth_current->next;
}

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;
}

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 (!is_zero_ether_addr(env_enetaddr)) {
		if (!is_zero_ether_addr(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 (is_zero_ether_addr(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 -ENODEV;

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

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

	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) || defined(CONFIG_PHYLIB)
	miiphy_init();
#endif

#ifdef CONFIG_PHYLIB
	phy_init();
#endif

	eth_env_init();

	/*
	 * 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, int 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 -ENODEV;
	}

	/* 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 -ETIMEDOUT;
}

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 -ENODEV;

	return eth_current->send(eth_current, packet, length);
}

int eth_rx(void)
{
	if (!eth_current)
		return -ENODEV;

	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 */

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

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_get_dev())
		return;

	if (first_restart)
		first_failed = eth_get_dev();

	eth_set_current_to_next();

	eth_current_changed();

	if (first_failed == eth_get_dev())
		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_get_dev())	/* 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_get_dev();
		do {
			if (strcmp(eth_get_name(), act) == 0)
				return;
			eth_set_current_to_next();
		} while (old_current != eth_get_dev());
	}

	eth_current_changed();
}

const char *eth_get_name(void)
{
	return eth_get_dev() ? eth_get_dev()->name : "unknown";
}
Commit	Line	Data
c609719b	1	/*
aba4b69d	2	* (C) Copyright 2001-2010
c609719b WD	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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
84eb1fba JH	58	static void eth_env_init(void)
	59	{
	60	const char *s;
	61
	62	s = getenv("bootfile");
	63	if (s != NULL)
	64	copy_filename(BootFile, s, sizeof(BootFile));
	65	}
c88ef3c1	66
ecee9324 BW	67	static int eth_mac_skip(int index)
	68	{
	69	char enetvar[15];
	70	char *skip_state;
	71	sprintf(enetvar, index ? "eth%dmacskip" : "ethmacskip", index);
	72	return ((skip_state = getenv(enetvar)) != NULL);
	73	}
	74
84eb1fba JH	75	static void eth_current_changed(void);
84eb1fba JH	76
dd35479a BW	77	/*
	78	* CPU and board-specific Ethernet initializations. Aliased function
	79	* signals caller to move on
	80	*/
	81	static int __def_eth_init(bd_t *bis)
	82	{
	83	return -1;
	84	}
f9a109b3 PT	85	int cpu_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
f9a109b3 PT	86	int board_eth_init(bd_t *bis) __attribute__((weak, alias("__def_eth_init")));
dd35479a	87
f85b6071	88	#ifdef CONFIG_API
f85b6071 RJ	89	static struct {
	90	uchar data[PKTSIZE];
	91	int length;
	92	} eth_rcv_bufs[PKTBUFSRX];
	93
66c7385a	94	static unsigned int eth_rcv_current, eth_rcv_last;
f85b6071 RJ	95	#endif
f85b6071 RJ	96
f8be7d65 JH	97	static struct eth_device *eth_devices;
f8be7d65 JH	98	struct eth_device *eth_current;
c609719b	99
84eb1fba JH	100	static void eth_set_current_to_next(void)
	101	{
	102	eth_current = eth_current->next;
	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;
9e56986a AF	130
	131	if (!eth_devices)
	132	return NULL;
	133
	134	dev = eth_devices;
	135	target_dev = NULL;
	136	do {
fea7dcae	137	if (dev->index == index) {
9e56986a AF	138	target_dev = dev;
	139	break;
	140	}
	141	dev = dev->next;
9e56986a AF	142	} while (dev != eth_devices);
	143
	144	return target_dev;
	145	}
	146
66c7385a	147	int eth_get_dev_index(void)
c609719b	148	{
66c7385a	149	if (!eth_current)
fea7dcae	150	return -1;
c609719b	151
fea7dcae	152	return eth_current->index;
c609719b WD	153	}
c609719b WD	154
7616e785 SG	155	int eth_write_hwaddr(struct eth_device dev, const char base_name,
	156	int eth_number)
	157	{
	158	unsigned char env_enetaddr[6];
	159	int ret = 0;
	160
69376644	161	eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
7616e785	162
4c7c65af JH	163	if (!is_zero_ether_addr(env_enetaddr)) {
	164	if (!is_zero_ether_addr(dev->enetaddr) &&
	165	memcmp(dev->enetaddr, env_enetaddr, 6)) {
7616e785 SG	166	printf("\nWarning: %s MAC addresses don't match:\n",
	167	dev->name);
	168	printf("Address in SROM is %pM\n",
	169	dev->enetaddr);
	170	printf("Address in environment is %pM\n",
	171	env_enetaddr);
	172	}
	173
	174	memcpy(dev->enetaddr, env_enetaddr, 6);
c88ef3c1 RH	175	} else if (is_valid_ether_addr(dev->enetaddr)) {
	176	eth_setenv_enetaddr_by_index(base_name, eth_number,
	177	dev->enetaddr);
	178	printf("\nWarning: %s using MAC address from net device\n",
	179	dev->name);
4c7c65af	180	} else if (is_zero_ether_addr(dev->enetaddr)) {
75d9a45c PM	181	printf("\nError: %s address not set.\n",
	182	dev->name);
	183	return -EINVAL;
7616e785 SG	184	}
7616e785 SG	185
75d9a45c PM	186	if (dev->write_hwaddr && !eth_mac_skip(eth_number)) {
	187	if (!is_valid_ether_addr(dev->enetaddr)) {
	188	printf("\nError: %s address %pM illegal value\n",
	189	dev->name, dev->enetaddr);
	190	return -EINVAL;
	191	}
460f949f	192
7616e785	193	ret = dev->write_hwaddr(dev);
75d9a45c PM	194	if (ret)
75d9a45c PM	195	printf("\nWarning: %s failed to set MAC address\n", dev->name);
460f949f	196	}
7616e785 SG	197
	198	return ret;
	199	}
	200
89d48367 SG	201	int eth_register(struct eth_device *dev)
	202	{
	203	struct eth_device *d;
66c7385a	204	static int index;
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 {
66c7385a	212	for (d = eth_devices; d->next != eth_devices; d = d->next)
aba4b69d	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)
05324a48	230	return -ENODEV;
e7e982d6 VP	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)
05324a48	238	return -ENODEV;
e7e982d6 VP	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);
27ee59af	260	#if defined(CONFIG_MII) \|\| defined(CONFIG_CMD_MII) \|\| defined(CONFIG_PHYLIB)
d9785c14 MB	261	miiphy_init();
d9785c14 MB	262	#endif
5f184715 AF	263
	264	#ifdef CONFIG_PHYLIB
	265	phy_init();
	266	#endif
	267
84eb1fba	268	eth_env_init();
de30122b	269
8ad25bf8 BW	270	/*
	271	* If board-specific initialization exists, call it.
	272	* If not, call a CPU-specific one
	273	*/
	274	if (board_eth_init != __def_eth_init) {
	275	if (board_eth_init(bis) < 0)
	276	printf("Board Net Initialization Failed\n");
	277	} else if (cpu_eth_init != __def_eth_init) {
	278	if (cpu_eth_init(bis) < 0)
	279	printf("CPU Net Initialization Failed\n");
	280	} else
	281	printf("Net Initialization Skipped\n");
d9785c14	282
c609719b	283	if (!eth_devices) {
66c7385a	284	puts("No ethernet found.\n");
770605e4	285	bootstage_error(BOOTSTAGE_ID_NET_ETH_START);
c609719b WD	286	} else {
c609719b WD	287	struct eth_device *dev = eth_devices;
66c7385a	288	char *ethprime = getenv("ethprime");
c609719b	289
770605e4	290	bootstage_mark(BOOTSTAGE_ID_NET_ETH_INIT);
c609719b	291	do {
fea7dcae	292	if (dev->index)
66c7385a	293	puts(", ");
c609719b WD	294
	295	printf("%s", dev->name);
	296
66c7385a	297	if (ethprime && strcmp(dev->name, ethprime) == 0) {
c609719b	298	eth_current = dev;
66c7385a	299	puts(" [PRIME]");
c609719b WD	300	}
c609719b WD	301
1384f3bb	302	if (strchr(dev->name, ' '))
66c7385a JH	303	puts("\nWarning: eth device name has a space!"
66c7385a JH	304	"\n");
1384f3bb	305
75d9a45c	306	eth_write_hwaddr(dev, "eth", dev->index);
c609719b	307
c609719b	308	dev = dev->next;
fea7dcae	309	num_devices++;
66c7385a	310	} while (dev != eth_devices);
c609719b	311
89d48367	312	eth_current_changed();
66c7385a	313	putc('\n');
c609719b WD	314	}
c609719b WD	315
fea7dcae	316	return num_devices;
c609719b WD	317	}
c609719b WD	318
53a5c424 DU	319	#ifdef CONFIG_MCAST_TFTP
	320	/* Multicast.
	321	* mcast_addr: multicast ipaddr from which multicast Mac is made
85eb5caf	322	* join: 1=join, 0=leave.
53a5c424	323	*/
fce6900b	324	int eth_mcast_join(IPaddr_t mcast_ip, int join)
53a5c424	325	{
66c7385a	326	u8 mcast_mac[6];
85eb5caf	327	if (!eth_current \|\| !eth_current->mcast)
53a5c424 DU	328	return -1;
	329	mcast_mac[5] = htonl(mcast_ip) & 0xff;
	330	mcast_mac[4] = (htonl(mcast_ip)>>8) & 0xff;
	331	mcast_mac[3] = (htonl(mcast_ip)>>16) & 0x7f;
	332	mcast_mac[2] = 0x5e;
	333	mcast_mac[1] = 0x0;
	334	mcast_mac[0] = 0x1;
	335	return eth_current->mcast(eth_current, mcast_mac, join);
	336	}
	337
85eb5caf WD	338	/* the 'way' for ethernet-CRC-32. Spliced in from Linux lib/crc32.c
85eb5caf WD	339	* and this is the ethernet-crc method needed for TSEC -- and perhaps
53a5c424 DU	340	* some other adapter -- hash tables
	341	*/
	342	#define CRCPOLY_LE 0xedb88320
66c7385a	343	u32 ether_crc(size_t len, unsigned char const *p)
53a5c424 DU	344	{
	345	int i;
	346	u32 crc;
	347	crc = ~0;
	348	while (len--) {
	349	crc ^= *p++;
	350	for (i = 0; i < 8; i++)
	351	crc = (crc >> 1) ^ ((crc & 1) ? CRCPOLY_LE : 0);
	352	}
	353	/* an reverse the bits, cuz of way they arrive -- last-first */
	354	crc = (crc >> 16) \| (crc << 16);
	355	crc = (crc >> 8 & 0x00ff00ff) \| (crc << 8 & 0xff00ff00);
	356	crc = (crc >> 4 & 0x0f0f0f0f) \| (crc << 4 & 0xf0f0f0f0);
	357	crc = (crc >> 2 & 0x33333333) \| (crc << 2 & 0xcccccccc);
	358	crc = (crc >> 1 & 0x55555555) \| (crc << 1 & 0xaaaaaaaa);
	359	return crc;
	360	}
	361
	362	#endif
	363
c609719b WD	364
	365	int eth_init(bd_t *bis)
	366	{
86848a74	367	struct eth_device old_current, dev;
c609719b	368
6bc11388	369	if (!eth_current) {
66c7385a	370	puts("No ethernet found.\n");
05324a48	371	return -ENODEV;
6bc11388	372	}
c609719b	373
86848a74	374	/* Sync environment with network devices */
86848a74 MF	375	dev = eth_devices;
	376	do {
	377	uchar env_enetaddr[6];
	378
fea7dcae	379	if (eth_getenv_enetaddr_by_index("eth", dev->index,
7616e785	380	env_enetaddr))
86848a74 MF	381	memcpy(dev->enetaddr, env_enetaddr, 6);
86848a74 MF	382
86848a74 MF	383	dev = dev->next;
	384	} while (dev != eth_devices);
	385
c609719b WD	386	old_current = eth_current;
c609719b WD	387	do {
0ebf04c6	388	debug("Trying %s\n", eth_current->name);
c609719b	389
66c7385a	390	if (eth_current->init(eth_current, bis) >= 0) {
c609719b WD	391	eth_current->state = ETH_STATE_ACTIVE;
c609719b WD	392
505be87a	393	return 0;
c609719b	394	}
0ebf04c6	395	debug("FAIL\n");
c609719b WD	396
	397	eth_try_another(0);
	398	} while (old_current != eth_current);
	399
05324a48	400	return -ETIMEDOUT;
c609719b WD	401	}
	402
	403	void eth_halt(void)
	404	{
	405	if (!eth_current)
	406	return;
	407
	408	eth_current->halt(eth_current);
	409
	410	eth_current->state = ETH_STATE_PASSIVE;
	411	}
	412
db288a96	413	int eth_send(void *packet, int length)
c609719b WD	414	{
c609719b WD	415	if (!eth_current)
05324a48	416	return -ENODEV;
c609719b WD	417
	418	return eth_current->send(eth_current, packet, length);
	419	}
	420
	421	int eth_rx(void)
	422	{
	423	if (!eth_current)
05324a48	424	return -ENODEV;
c609719b WD	425
	426	return eth_current->recv(eth_current);
	427	}
	428
f85b6071	429	#ifdef CONFIG_API
db288a96	430	static void eth_save_packet(void *packet, int length)
f85b6071	431	{
db288a96	432	char *p = packet;
f85b6071 RJ	433	int i;
	434
	435	if ((eth_rcv_last+1) % PKTBUFSRX == eth_rcv_current)
	436	return;
	437
	438	if (PKTSIZE < length)
	439	return;
	440
	441	for (i = 0; i < length; i++)
	442	eth_rcv_bufs[eth_rcv_last].data[i] = p[i];
	443
	444	eth_rcv_bufs[eth_rcv_last].length = length;
	445	eth_rcv_last = (eth_rcv_last + 1) % PKTBUFSRX;
	446	}
	447
db288a96	448	int eth_receive(void *packet, int length)
f85b6071	449	{
db288a96	450	char *p = packet;
f85b6071 RJ	451	void *pp = push_packet;
	452	int i;
	453
	454	if (eth_rcv_current == eth_rcv_last) {
	455	push_packet = eth_save_packet;
	456	eth_rx();
	457	push_packet = pp;
	458
	459	if (eth_rcv_current == eth_rcv_last)
	460	return -1;
	461	}
	462
46c07bcf	463	length = min(eth_rcv_bufs[eth_rcv_current].length, length);
f85b6071 RJ	464
	465	for (i = 0; i < length; i++)
	466	p[i] = eth_rcv_bufs[eth_rcv_current].data[i];
	467
	468	eth_rcv_current = (eth_rcv_current + 1) % PKTBUFSRX;
	469	return length;
	470	}
	471	#endif /* CONFIG_API */
	472
84eb1fba JH	473	static void eth_current_changed(void)
	474	{
	475	char *act = getenv("ethact");
	476	/* update current ethernet name */
	477	if (eth_get_dev()) {
	478	if (act == NULL \|\| strcmp(act, eth_get_name()) != 0)
	479	setenv("ethact", eth_get_name());
	480	}
	481	/*
	482	* remove the variable completely if there is no active
	483	* interface
	484	*/
	485	else if (act != NULL)
	486	setenv("ethact", NULL);
	487	}
	488
c609719b WD	489	void eth_try_another(int first_restart)
c609719b WD	490	{
66c7385a	491	static struct eth_device *first_failed;
c650e1be	492	char *ethrotate;
e1692577 MF	493
	494	/*
	495	* Do not rotate between network interfaces when
	496	* 'ethrotate' variable is set to 'no'.
	497	*/
66c7385a JH	498	ethrotate = getenv("ethrotate");
66c7385a JH	499	if ((ethrotate != NULL) && (strcmp(ethrotate, "no") == 0))
e1692577	500	return;
c609719b	501
84eb1fba	502	if (!eth_get_dev())
c609719b WD	503	return;
c609719b WD	504
66c7385a	505	if (first_restart)
84eb1fba	506	first_failed = eth_get_dev();
c609719b	507
84eb1fba	508	eth_set_current_to_next();
c609719b	509
89d48367	510	eth_current_changed();
a3d991bd	511
84eb1fba	512	if (first_failed == eth_get_dev())
c609719b	513	NetRestartWrap = 1;
c609719b WD	514	}
c609719b WD	515
a3d991bd WD	516	void eth_set_current(void)
a3d991bd WD	517	{
66c7385a JH	518	static char *act;
	519	static int env_changed_id;
	520	struct eth_device *old_current;
2f70c49e	521	int env_id;
a3d991bd	522
84eb1fba	523	if (!eth_get_dev()) /* XXX no current */
a3d991bd WD	524	return;
a3d991bd WD	525
2f70c49e HS	526	env_id = get_env_id();
	527	if ((act == NULL) \|\| (env_changed_id != env_id)) {
	528	act = getenv("ethact");
	529	env_changed_id = env_id;
	530	}
a3d991bd	531	if (act != NULL) {
84eb1fba	532	old_current = eth_get_dev();
a3d991bd	533	do {
84eb1fba	534	if (strcmp(eth_get_name(), act) == 0)
a3d991bd	535	return;
84eb1fba JH	536	eth_set_current_to_next();
84eb1fba JH	537	} while (old_current != eth_get_dev());
a3d991bd WD	538	}
a3d991bd WD	539
89d48367	540	eth_current_changed();
a3d991bd	541	}
a3d991bd	542
84eb1fba	543	const char *eth_get_name(void)
5bb226e8	544	{
84eb1fba	545	return eth_get_dev() ? eth_get_dev()->name : "unknown";
5bb226e8	546	}