summaryrefslogtreecommitdiff
path: root/board/xilinx/xilinx_enet/emac_adapter.c
blob: b30e8976692211c55242938ed70296f90a5ab38d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
/******************************************************************************
*
*     Author: Xilinx, Inc.
*
*
*     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.
*
*
*     XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A
*     COURTESY TO YOU. BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS
*     ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION OR STANDARD,
*     XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION IS FREE
*     FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE FOR OBTAINING
*     ANY THIRD PARTY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION.
*     XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO
*     THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY
*     WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM
*     CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND
*     FITNESS FOR A PARTICULAR PURPOSE.
*
*
*     Xilinx hardware products are not intended for use in life support
*     appliances, devices, or systems. Use in such applications is
*     expressly prohibited.
*
*
*     (c) Copyright 2002-2004 Xilinx Inc.
*     All rights reserved.
*
*
*     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.,
*     675 Mass Ave, Cambridge, MA 02139, USA.
*
******************************************************************************/

#include <common.h>
#include <net.h>
#include "xparameters.h"
#include "xemac.h"

#if defined(XPAR_EMAC_0_DEVICE_ID)
/*
 * ENET_MAX_MTU and ENET_MAX_MTU_ALIGNED are set from
 * PKTSIZE and PKTSIZE_ALIGN (include/net.h)
 */

#define ENET_MAX_MTU           PKTSIZE
#define ENET_MAX_MTU_ALIGNED   PKTSIZE_ALIGN
#define ENET_ADDR_LENGTH       6

static XEmac Emac;
static char etherrxbuff[PKTSIZE_ALIGN];	/* Receive buffer */

/* hardcoded MAC address for the Xilinx EMAC Core when env is nowhere*/
#ifdef CFG_ENV_IS_NOWHERE
static u8 EMACAddr[ENET_ADDR_LENGTH] = { 0x00, 0x0a, 0x35, 0x00, 0x22, 0x01 };
#endif

static int initialized = 0;

void
eth_halt(void)
{
	if (initialized)
		(void) XEmac_Stop(&Emac);
}

int
eth_init(bd_t * bis)
{
	u32 Options;
	XStatus Result;

#ifdef DEBUG
	printf("EMAC Initialization Started\n\r");
#endif

	Result = XEmac_Initialize(&Emac, XPAR_EMAC_0_DEVICE_ID);
	if (Result != XST_SUCCESS) {
		return 0;
	}

	/* make sure the Emac is stopped before it is started */
	(void) XEmac_Stop(&Emac);

#ifdef CFG_ENV_IS_NOWHERE
	memcpy(bis->bi_enetaddr, EMACAddr, 6);
#endif

	Result = XEmac_SetMacAddress(&Emac, bis->bi_enetaddr);
	if (Result != XST_SUCCESS) {
		return 0;
	}

	Options =
	    (XEM_POLLED_OPTION | XEM_UNICAST_OPTION | XEM_BROADCAST_OPTION |
	     XEM_FDUPLEX_OPTION | XEM_INSERT_FCS_OPTION |
	     XEM_INSERT_PAD_OPTION);
	Result = XEmac_SetOptions(&Emac, Options);
	if (Result != XST_SUCCESS) {
		return 0;
	}

	Result = XEmac_Start(&Emac);
	if (Result != XST_SUCCESS) {
		return 0;
	}
#ifdef DEBUG
	printf("EMAC Initialization complete\n\r");
#endif

	initialized = 1;

	return (0);
}

/*-----------------------------------------------------------------------------+
+-----------------------------------------------------------------------------*/
int
eth_send(volatile void *ptr, int len)
{
	XStatus Result;

	if (len > ENET_MAX_MTU)
		len = ENET_MAX_MTU;

	Result = XEmac_PollSend(&Emac, (u8 *) ptr, len);
	if (Result == XST_SUCCESS) {
		return (1);
	} else {
		printf("Error while sending frame\n\r");
		return (0);
	}

}

int
eth_rx(void)
{
	u32 RecvFrameLength;
	XStatus Result;

	RecvFrameLength = PKTSIZE;
	Result = XEmac_PollRecv(&Emac, (u8 *) etherrxbuff, &RecvFrameLength);
	if (Result == XST_SUCCESS) {
		NetReceive((uchar *)etherrxbuff, RecvFrameLength);
		return (1);
	} else {
		return (0);
	}
}

#endif