xref: /openbmc/u-boot/drivers/net/ep93xx_eth.h (revision 5794619e)
1 /*
2  * Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
3  *
4  * Copyright (C) 2004, 2005
5  * Cory T. Tusar, Videon Central, Inc., <ctusar@videon-central.com>
6  *
7  * See file CREDITS for list of people who contributed to this
8  * project.
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License as
12  * published by the Free Software Foundation; either version 2 of
13  * the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23  * MA 02111-1307 USA
24  *
25  */
26 
27 #ifndef _EP93XX_ETH_H
28 #define _EP93XX_ETH_H
29 
30 #include <net.h>
31 
32 /**
33  * #define this to dump device status and queue info during initialization and
34  * following errors.
35  */
36 #undef EP93XX_MAC_DEBUG
37 
38 /**
39  * Number of descriptor and status entries in our RX queues.
40  * It must be power of 2 !
41  */
42 #define NUMRXDESC		PKTBUFSRX
43 
44 /**
45  * Number of descriptor and status entries in our TX queues.
46  */
47 #define NUMTXDESC		1
48 
49 /**
50  * 944 = (1024 - 64) - 16, Fifo size - Minframesize - 16 (Chip FACT)
51  */
52 #define TXSTARTMAX		944
53 
54 /**
55  * Receive descriptor queue entry
56  */
57 struct rx_descriptor {
58 	uint32_t word1;
59 	uint32_t word2;
60 };
61 
62 /**
63  * Receive status queue entry
64  */
65 struct rx_status {
66 	uint32_t word1;
67 	uint32_t word2;
68 };
69 
70 #define RX_STATUS_RWE(rx_status) ((rx_status->word1 >> 30) & 0x01)
71 #define RX_STATUS_RFP(rx_status) ((rx_status->word1 >> 31) & 0x01)
72 #define RX_STATUS_FRAME_LEN(rx_status) (rx_status->word2 & 0xFFFF)
73 
74 /**
75  * Transmit descriptor queue entry
76  */
77 struct tx_descriptor {
78 	uint32_t word1;
79 	uint32_t word2;
80 };
81 
82 #define TX_DESC_EOF (1 << 31)
83 
84 /**
85  * Transmit status queue entry
86  */
87 struct tx_status {
88 	uint32_t word1;
89 };
90 
91 #define TX_STATUS_TXWE(tx_status) (((tx_status)->word1 >> 30) & 0x01)
92 #define TX_STATUS_TXFP(tx_status) (((tx_status)->word1 >> 31) & 0x01)
93 
94 /**
95  * Transmit descriptor queue
96  */
97 struct tx_descriptor_queue {
98 	struct tx_descriptor *base;
99 	struct tx_descriptor *current;
100 	struct tx_descriptor *end;
101 };
102 
103 /**
104  * Transmit status queue
105  */
106 struct tx_status_queue {
107 	struct tx_status *base;
108 	volatile struct tx_status *current;
109 	struct tx_status *end;
110 };
111 
112 /**
113  * Receive descriptor queue
114  */
115 struct rx_descriptor_queue {
116 	struct rx_descriptor *base;
117 	struct rx_descriptor *current;
118 	struct rx_descriptor *end;
119 };
120 
121 /**
122  * Receive status queue
123  */
124 struct rx_status_queue {
125 	struct rx_status *base;
126 	volatile struct rx_status *current;
127 	struct rx_status *end;
128 };
129 
130 /**
131  * EP93xx MAC private data structure
132  */
133 struct ep93xx_priv {
134 	struct rx_descriptor_queue	rx_dq;
135 	struct rx_status_queue		rx_sq;
136 	void				*rx_buffer[NUMRXDESC];
137 
138 	struct tx_descriptor_queue	tx_dq;
139 	struct tx_status_queue		tx_sq;
140 
141 	struct mac_regs			*regs;
142 };
143 
144 #endif
145