[people/ms/u-boot.git] / drivers / net / plb2800_eth.c

/*
 * PLB2800 internal switch ethernet driver.
 *
 * (C) Copyright 2003
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <malloc.h>
#include <net.h>
#include <netdev.h>
#include <asm/addrspace.h>


#define NUM_RX_DESC	PKTBUFSRX
#define TOUT_LOOP	1000000

#define LONG_REF(addr) (*((volatile unsigned long*)addr))

#define CMAC_CRX_CTRL	LONG_REF(0xb800c870)
#define CMAC_CTX_CTRL	LONG_REF(0xb800c874)
#define SYS_MAC_ADDR_0	LONG_REF(0xb800c878)
#define SYS_MAC_ADDR_1	LONG_REF(0xb800c87c)
#define MIPS_H_MASK	LONG_REF(0xB800C810)

#define MA_LEARN	LONG_REF(0xb8008004)
#define DA_LOOKUP	LONG_REF(0xb8008008)

#define CMAC_CRX_CTRL_PD	0x00000001
#define CMAC_CRX_CTRL_CG	0x00000002
#define CMAC_CRX_CTRL_PL_SHIFT	2
#define CMAC_CRIT		0x0
#define CMAC_NON_CRIT		0x1
#define MBOX_STAT_ID_SHF	28
#define MBOX_STAT_CP		0x80000000
#define MBOX_STAT_MB		0x00000001
#define EN_MA_LEARN		0x02000000
#define EN_DA_LKUP		0x01000000
#define MA_DEST_SHF		11
#define DA_DEST_SHF		11
#define DA_STATE_SHF		19
#define TSTAMP_MS		0x00000000
#define SW_H_MBOX4_MASK		0x08000000
#define SW_H_MBOX3_MASK		0x04000000
#define SW_H_MBOX2_MASK		0x02000000
#define SW_H_MBOX1_MASK		0x01000000

typedef volatile struct {
  unsigned int stat;
  unsigned int cmd;
  unsigned int cnt;
  unsigned int adr;
} mailbox_t;

#define MBOX_REG(mb) ((mailbox_t*)(0xb800c830+(mb<<4)))

typedef volatile struct {
  unsigned int word0;
  unsigned int word1;
  unsigned int word2;
} mbhdr_t;

#define MBOX_MEM(mb) ((void*)(0xb800a000+((3-mb)<<11)))


static int plb2800_eth_init(struct eth_device *dev, bd_t * bis);
static int plb2800_eth_send(struct eth_device *dev, void *packet, int length);
static int plb2800_eth_recv(struct eth_device *dev);
static void plb2800_eth_halt(struct eth_device *dev);

static void plb2800_set_mac_addr(struct eth_device *dev, unsigned char * addr);
static unsigned char * plb2800_get_mac_addr(void);

static int rx_new;
static int mac_addr_set = 0;


int plb2800_eth_initialize(bd_t * bis)
{
	struct eth_device *dev;
	ulong temp;

#ifdef DEBUG
	printf("Entered plb2800_eth_initialize()\n");
#endif

	if (!(dev = (struct eth_device *) malloc (sizeof *dev)))
	{
		printf("Failed to allocate memory\n");
		return -1;
	}
	memset(dev, 0, sizeof(*dev));

	sprintf(dev->name, "PLB2800 Switch");
	dev->init = plb2800_eth_init;
	dev->halt = plb2800_eth_halt;
	dev->send = plb2800_eth_send;
	dev->recv = plb2800_eth_recv;

	eth_register(dev);

	/* bug fix */
	*(ulong *)0xb800e800 = 0x838;

	/* Set MBOX ownership */
	temp = CMAC_CRIT << MBOX_STAT_ID_SHF;
	MBOX_REG(0)->stat = temp;
	MBOX_REG(1)->stat = temp;

	temp = CMAC_NON_CRIT << MBOX_STAT_ID_SHF;
	MBOX_REG(2)->stat = temp;
	MBOX_REG(3)->stat = temp;

	plb2800_set_mac_addr(dev, plb2800_get_mac_addr());

	/* Disable all Mbox interrupt */
	temp = MIPS_H_MASK;
	temp &= ~ (SW_H_MBOX1_MASK | SW_H_MBOX2_MASK | SW_H_MBOX3_MASK | SW_H_MBOX4_MASK) ;
	MIPS_H_MASK = temp;

#ifdef DEBUG
	printf("Leaving plb2800_eth_initialize()\n");
#endif

	return 0;
}

static int plb2800_eth_init(struct eth_device *dev, bd_t * bis)
{
#ifdef DEBUG
	printf("Entering plb2800_eth_init()\n");
#endif

	plb2800_set_mac_addr(dev, dev->enetaddr);

	rx_new = 0;

#ifdef DEBUG
	printf("Leaving plb2800_eth_init()\n");
#endif

	return 0;
}


static int plb2800_eth_send(struct eth_device *dev, void *packet, int length)
{
	int                    i;
	int                    res         = -1;
	u32                    temp;
	mailbox_t *            mb          = MBOX_REG(0);
	char      *            mem         = MBOX_MEM(0);

#ifdef DEBUG
	printf("Entered plb2800_eth_send()\n");
#endif

	if (length <= 0)
	{
		printf ("%s: bad packet size: %d\n", dev->name, length);
		goto Done;
	}

	if (length < 64)
	{
		length = 64;
	}

	temp = CMAC_CRX_CTRL_CG | ((length + 4) << CMAC_CRX_CTRL_PL_SHIFT);

#ifdef DEBUG
	printf("0 mb->stat = 0x%x\n",  mb->stat);
#endif

	for(i = 0; mb->stat & (MBOX_STAT_CP | MBOX_STAT_MB); i++)
	{
		if (i >= TOUT_LOOP)
		{
			printf("%s: tx buffer not ready\n", dev->name);
			printf("1 mb->stat = 0x%x\n",  mb->stat);
			goto Done;
		}
	}

		/* For some strange reason, memcpy doesn't work, here!
		 */
	do
	{
		int words = (length >> 2) + 1;
		unsigned int* dst = (unsigned int*)(mem);
		unsigned int* src = (unsigned int*)(packet);
		for (i = 0; i < words; i++)
		{
			*dst = *src;
			dst++;
			src++;
		};
	} while(0);

	CMAC_CRX_CTRL = temp;
	mb->cmd = MBOX_STAT_CP;

#ifdef DEBUG
	printf("2 mb->stat = 0x%x\n",  mb->stat);
#endif

	res = length;
Done:

#ifdef DEBUG
	printf("Leaving plb2800_eth_send()\n");
#endif

	return res;
}


static int plb2800_eth_recv(struct eth_device *dev)
{
	int                    length  = 0;
	mailbox_t            * mbox    = MBOX_REG(3);
	unsigned char        * hdr     = MBOX_MEM(3);
	unsigned int           stat;

#ifdef DEBUG
	printf("Entered plb2800_eth_recv()\n");
#endif

	for (;;)
	{
		stat = mbox->stat;

		if (!(stat & MBOX_STAT_CP))
		{
			break;
		}

		length = ((*(hdr + 6) & 0x3f) << 8) + *(hdr + 7);
		memcpy((void *)NetRxPackets[rx_new], hdr + 12, length);

		stat &= ~MBOX_STAT_CP;
		mbox->stat = stat;
#ifdef DEBUG
		{
			int i;
			for (i=0;i<length - 4;i++)
			{
				if (i % 16 == 0) printf("\n%04x: ", i);
				printf("%02X ", NetRxPackets[rx_new][i]);
			}
			printf("\n");
		}
#endif

		if (length)
		{
#ifdef DEBUG
			printf("Received %d bytes\n", length);
#endif
			NetReceive((void*)(NetRxPackets[rx_new]),
				    length - 4);
		}
		else
		{
#if 1
			printf("Zero length!!!\n");
#endif
		}

		rx_new = (rx_new + 1) % NUM_RX_DESC;
	}

#ifdef DEBUG
	printf("Leaving plb2800_eth_recv()\n");
#endif

	return length;
}


static void plb2800_eth_halt(struct eth_device *dev)
{
#ifdef DEBUG
	printf("Entered plb2800_eth_halt()\n");
#endif

#ifdef DEBUG
	printf("Leaving plb2800_eth_halt()\n");
#endif
}

static void plb2800_set_mac_addr(struct eth_device *dev, unsigned char * addr)
{
	char packet[60];
	ulong temp;
	int ix;

	if (mac_addr_set ||
	    NULL == addr || memcmp(addr, "\0\0\0\0\0\0", 6) == 0)
	{
		return;
	}

	/* send one packet through CPU port
	 * in order to learn system MAC address
	 */

	/* Set DA_LOOKUP register */
	temp = EN_MA_LEARN | (0 << DA_STATE_SHF) | (63 << DA_DEST_SHF);
	DA_LOOKUP = temp;

	/* Set MA_LEARN register */
	temp = 50 << MA_DEST_SHF;	/* static entry */
	MA_LEARN = temp;

	/* set destination address */
	for (ix=0;ix<6;ix++)
		packet[ix] = 0xff;

	/* set source address = system MAC address */
	for (ix=0;ix<6;ix++)
		packet[6+ix] = addr[ix];

	/* set type field */
	packet[12]=0xaa;
	packet[13]=0x55;

	/* set data field */
	for(ix=14;ix<60;ix++)
		packet[ix] = 0x00;

#ifdef DEBUG
	for (ix=0;ix<6;ix++)
		printf("mac_addr[%d]=%02X\n", ix, (unsigned char)packet[6+ix]);
#endif

	/* set one packet */
	plb2800_eth_send(dev, packet, sizeof(packet));

	/* delay for a while */
	for(ix=0;ix<65535;ix++)
		temp = ~temp;

	/* Set CMAC_CTX_CTRL register */
	temp = TSTAMP_MS;	/* no autocast */
	CMAC_CTX_CTRL = temp;

	/* Set DA_LOOKUP register */
	temp = EN_DA_LKUP;
	DA_LOOKUP = temp;

	mac_addr_set = 1;
}

static unsigned char * plb2800_get_mac_addr(void)
{
	static unsigned char addr[6];
	char *tmp, *end;
	int i;

	tmp = getenv ("ethaddr");
	if (NULL == tmp) return NULL;

	for (i=0; i<6; i++) {
		addr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
		if (tmp)
			tmp = (*end) ? end+1 : end;
	}

	return addr;
}
Commit	Line	Data
60fbe254 WD	1	/*
	2	* PLB2800 internal switch ethernet driver.
	3	*
	4	* (C) Copyright 2003
	5	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	6	*
3765b3e7	7	* SPDX-License-Identifier: GPL-2.0+
60fbe254 WD	8	*/
	9
	10	#include <common.h>
60fbe254 WD	11	#include <malloc.h>
60fbe254 WD	12	#include <net.h>
4fce2ace	13	#include <netdev.h>
60fbe254 WD	14	#include <asm/addrspace.h>
	15
	16
	17	#define NUM_RX_DESC PKTBUFSRX
	18	#define TOUT_LOOP 1000000
	19
	20	#define LONG_REF(addr) (((volatile unsigned long)addr))
	21
	22	#define CMAC_CRX_CTRL LONG_REF(0xb800c870)
	23	#define CMAC_CTX_CTRL LONG_REF(0xb800c874)
	24	#define SYS_MAC_ADDR_0 LONG_REF(0xb800c878)
	25	#define SYS_MAC_ADDR_1 LONG_REF(0xb800c87c)
	26	#define MIPS_H_MASK LONG_REF(0xB800C810)
	27
	28	#define MA_LEARN LONG_REF(0xb8008004)
	29	#define DA_LOOKUP LONG_REF(0xb8008008)
	30
	31	#define CMAC_CRX_CTRL_PD 0x00000001
	32	#define CMAC_CRX_CTRL_CG 0x00000002
	33	#define CMAC_CRX_CTRL_PL_SHIFT 2
	34	#define CMAC_CRIT 0x0
	35	#define CMAC_NON_CRIT 0x1
	36	#define MBOX_STAT_ID_SHF 28
	37	#define MBOX_STAT_CP 0x80000000
	38	#define MBOX_STAT_MB 0x00000001
	39	#define EN_MA_LEARN 0x02000000
	40	#define EN_DA_LKUP 0x01000000
8bde7f77	41	#define MA_DEST_SHF 11
60fbe254 WD	42	#define DA_DEST_SHF 11
	43	#define DA_STATE_SHF 19
	44	#define TSTAMP_MS 0x00000000
	45	#define SW_H_MBOX4_MASK 0x08000000
	46	#define SW_H_MBOX3_MASK 0x04000000
	47	#define SW_H_MBOX2_MASK 0x02000000
	48	#define SW_H_MBOX1_MASK 0x01000000
	49
	50	typedef volatile struct {
	51	unsigned int stat;
	52	unsigned int cmd;
	53	unsigned int cnt;
	54	unsigned int adr;
	55	} mailbox_t;
	56
	57	#define MBOX_REG(mb) ((mailbox_t*)(0xb800c830+(mb<<4)))
	58
	59	typedef volatile struct {
	60	unsigned int word0;
	61	unsigned int word1;
	62	unsigned int word2;
	63	} mbhdr_t;
	64
	65	#define MBOX_MEM(mb) ((void*)(0xb800a000+((3-mb)<<11)))
	66
	67
	68	static int plb2800_eth_init(struct eth_device dev, bd_t bis);
10cbe3b6	69	static int plb2800_eth_send(struct eth_device dev, void packet, int length);
60fbe254 WD	70	static int plb2800_eth_recv(struct eth_device *dev);
	71	static void plb2800_eth_halt(struct eth_device *dev);
	72
	73	static void plb2800_set_mac_addr(struct eth_device dev, unsigned char addr);
	74	static unsigned char * plb2800_get_mac_addr(void);
	75
	76	static int rx_new;
	77	static int mac_addr_set = 0;
	78
	79
	80	int plb2800_eth_initialize(bd_t * bis)
	81	{
	82	struct eth_device *dev;
	83	ulong temp;
	84
	85	#ifdef DEBUG
	86	printf("Entered plb2800_eth_initialize()\n");
	87	#endif
	88
	89	if (!(dev = (struct eth_device ) malloc (sizeof dev)))
	90	{
	91	printf("Failed to allocate memory\n");
4fce2ace	92	return -1;
60fbe254 WD	93	}
	94	memset(dev, 0, sizeof(*dev));
	95
	96	sprintf(dev->name, "PLB2800 Switch");
	97	dev->init = plb2800_eth_init;
	98	dev->halt = plb2800_eth_halt;
	99	dev->send = plb2800_eth_send;
	100	dev->recv = plb2800_eth_recv;
	101
	102	eth_register(dev);
	103
8bde7f77 WD	104	/* bug fix */
8bde7f77 WD	105	(ulong )0xb800e800 = 0x838;
60fbe254 WD	106
	107	/* Set MBOX ownership */
	108	temp = CMAC_CRIT << MBOX_STAT_ID_SHF;
	109	MBOX_REG(0)->stat = temp;
	110	MBOX_REG(1)->stat = temp;
	111
8bde7f77	112	temp = CMAC_NON_CRIT << MBOX_STAT_ID_SHF;
60fbe254 WD	113	MBOX_REG(2)->stat = temp;
60fbe254 WD	114	MBOX_REG(3)->stat = temp;
8bde7f77	115
60fbe254 WD	116	plb2800_set_mac_addr(dev, plb2800_get_mac_addr());
	117
	118	/* Disable all Mbox interrupt */
	119	temp = MIPS_H_MASK;
8bde7f77	120	temp &= ~ (SW_H_MBOX1_MASK \| SW_H_MBOX2_MASK \| SW_H_MBOX3_MASK \| SW_H_MBOX4_MASK) ;
60fbe254 WD	121	MIPS_H_MASK = temp;
	122
	123	#ifdef DEBUG
	124	printf("Leaving plb2800_eth_initialize()\n");
	125	#endif
	126
4fce2ace	127	return 0;
60fbe254 WD	128	}
	129
	130	static int plb2800_eth_init(struct eth_device dev, bd_t bis)
	131	{
	132	#ifdef DEBUG
	133	printf("Entering plb2800_eth_init()\n");
	134	#endif
	135
	136	plb2800_set_mac_addr(dev, dev->enetaddr);
	137
	138	rx_new = 0;
	139
	140	#ifdef DEBUG
	141	printf("Leaving plb2800_eth_init()\n");
	142	#endif
	143
	144	return 0;
	145	}
	146
	147
10cbe3b6	148	static int plb2800_eth_send(struct eth_device dev, void packet, int length)
60fbe254 WD	149	{
	150	int i;
	151	int res = -1;
	152	u32 temp;
	153	mailbox_t * mb = MBOX_REG(0);
	154	char * mem = MBOX_MEM(0);
	155
	156	#ifdef DEBUG
	157	printf("Entered plb2800_eth_send()\n");
	158	#endif
	159
	160	if (length <= 0)
	161	{
	162	printf ("%s: bad packet size: %d\n", dev->name, length);
	163	goto Done;
	164	}
	165
	166	if (length < 64)
	167	{
	168	length = 64;
	169	}
	170
	171	temp = CMAC_CRX_CTRL_CG \| ((length + 4) << CMAC_CRX_CTRL_PL_SHIFT);
	172
	173	#ifdef DEBUG
	174	printf("0 mb->stat = 0x%x\n", mb->stat);
	175	#endif
	176
	177	for(i = 0; mb->stat & (MBOX_STAT_CP \| MBOX_STAT_MB); i++)
	178	{
	179	if (i >= TOUT_LOOP)
	180	{
	181	printf("%s: tx buffer not ready\n", dev->name);
	182	printf("1 mb->stat = 0x%x\n", mb->stat);
	183	goto Done;
	184	}
	185	}
	186
	187	/* For some strange reason, memcpy doesn't work, here!
	188	*/
	189	do
	190	{
	191	int words = (length >> 2) + 1;
	192	unsigned int* dst = (unsigned int*)(mem);
	193	unsigned int* src = (unsigned int*)(packet);
	194	for (i = 0; i < words; i++)
	195	{
	196	dst = src;
	197	dst++;
	198	src++;
	199	};
	200	} while(0);
	201
	202	CMAC_CRX_CTRL = temp;
	203	mb->cmd = MBOX_STAT_CP;
8bde7f77	204
60fbe254 WD	205	#ifdef DEBUG
	206	printf("2 mb->stat = 0x%x\n", mb->stat);
	207	#endif
	208
	209	res = length;
	210	Done:
	211
	212	#ifdef DEBUG
	213	printf("Leaving plb2800_eth_send()\n");
	214	#endif
	215
	216	return res;
	217	}
	218
	219
	220	static int plb2800_eth_recv(struct eth_device *dev)
	221	{
	222	int length = 0;
	223	mailbox_t * mbox = MBOX_REG(3);
	224	unsigned char * hdr = MBOX_MEM(3);
	225	unsigned int stat;
	226
	227	#ifdef DEBUG
	228	printf("Entered plb2800_eth_recv()\n");
	229	#endif
	230
	231	for (;;)
	232	{
	233	stat = mbox->stat;
	234
	235	if (!(stat & MBOX_STAT_CP))
	236	{
	237	break;
	238	}
8bde7f77	239
60fbe254 WD	240	length = (((hdr + 6) & 0x3f) << 8) + (hdr + 7);
	241	memcpy((void *)NetRxPackets[rx_new], hdr + 12, length);
	242
	243	stat &= ~MBOX_STAT_CP;
	244	mbox->stat = stat;
	245	#ifdef DEBUG
	246	{
	247	int i;
	248	for (i=0;i<length - 4;i++)
	249	{
	250	if (i % 16 == 0) printf("\n%04x: ", i);
	251	printf("%02X ", NetRxPackets[rx_new][i]);
	252	}
	253	printf("\n");
	254	}
	255	#endif
	256
	257	if (length)
	258	{
	259	#ifdef DEBUG
	260	printf("Received %d bytes\n", length);
	261	#endif
	262	NetReceive((void*)(NetRxPackets[rx_new]),
93e14596	263	length - 4);
60fbe254 WD	264	}
	265	else
	266	{
	267	#if 1
	268	printf("Zero length!!!\n");
	269	#endif
	270	}
	271
	272	rx_new = (rx_new + 1) % NUM_RX_DESC;
	273	}
	274
	275	#ifdef DEBUG
	276	printf("Leaving plb2800_eth_recv()\n");
	277	#endif
	278
	279	return length;
	280	}
	281
	282
	283	static void plb2800_eth_halt(struct eth_device *dev)
	284	{
	285	#ifdef DEBUG
	286	printf("Entered plb2800_eth_halt()\n");
	287	#endif
	288
	289	#ifdef DEBUG
	290	printf("Leaving plb2800_eth_halt()\n");
	291	#endif
	292	}
	293
	294	static void plb2800_set_mac_addr(struct eth_device dev, unsigned char addr)
	295	{
	296	char packet[60];
	297	ulong temp;
	298	int ix;
	299
	300	if (mac_addr_set \|\|
	301	NULL == addr \|\| memcmp(addr, "\0\0\0\0\0\0", 6) == 0)
	302	{
	303	return;
	304	}
8bde7f77	305
60fbe254 WD	306	/* send one packet through CPU port
60fbe254 WD	307	* in order to learn system MAC address
8bde7f77	308	*/
60fbe254 WD	309
60fbe254 WD	310	/* Set DA_LOOKUP register */
8bde7f77	311	temp = EN_MA_LEARN \| (0 << DA_STATE_SHF) \| (63 << DA_DEST_SHF);
60fbe254 WD	312	DA_LOOKUP = temp;
	313
	314	/* Set MA_LEARN register */
53677ef1	315	temp = 50 << MA_DEST_SHF; /* static entry */
60fbe254 WD	316	MA_LEARN = temp;
	317
	318	/* set destination address */
	319	for (ix=0;ix<6;ix++)
	320	packet[ix] = 0xff;
8bde7f77	321
60fbe254 WD	322	/* set source address = system MAC address */
	323	for (ix=0;ix<6;ix++)
	324	packet[6+ix] = addr[ix];
	325
	326	/* set type field */
	327	packet[12]=0xaa;
	328	packet[13]=0x55;
	329
	330	/* set data field */
	331	for(ix=14;ix<60;ix++)
	332	packet[ix] = 0x00;
8bde7f77	333
60fbe254 WD	334	#ifdef DEBUG
	335	for (ix=0;ix<6;ix++)
	336	printf("mac_addr[%d]=%02X\n", ix, (unsigned char)packet[6+ix]);
	337	#endif
	338
	339	/* set one packet */
	340	plb2800_eth_send(dev, packet, sizeof(packet));
	341
	342	/* delay for a while */
	343	for(ix=0;ix<65535;ix++)
	344	temp = ~temp;
	345
8bde7f77	346	/* Set CMAC_CTX_CTRL register */
60fbe254 WD	347	temp = TSTAMP_MS; /* no autocast */
60fbe254 WD	348	CMAC_CTX_CTRL = temp;
8bde7f77	349
60fbe254 WD	350	/* Set DA_LOOKUP register */
	351	temp = EN_DA_LKUP;
	352	DA_LOOKUP = temp;
	353
	354	mac_addr_set = 1;
	355	}
	356
	357	static unsigned char * plb2800_get_mac_addr(void)
	358	{
	359	static unsigned char addr[6];
	360	char tmp, end;
	361	int i;
8bde7f77	362
60fbe254 WD	363	tmp = getenv ("ethaddr");
60fbe254 WD	364	if (NULL == tmp) return NULL;
8bde7f77	365
60fbe254 WD	366	for (i=0; i<6; i++) {
	367	addr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
	368	if (tmp)
	369	tmp = (*end) ? end+1 : end;
	370	}
	371
	372	return addr;
	373	}