summaryrefslogtreecommitdiffstats
path: root/drivers/net/ep93xx.h
blob: b06692ccfbbf9a9d7122376766522cf0eb62244d (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
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2009 Matthias Kaehlcke <matthias@kaehlcke.net>
 *
 * Copyright (C) 2004, 2005
 * Cory T. Tusar, Videon Central, Inc., <ctusar@videon-central.com>
 */

#ifndef _ETH_H
#define _ETH_H

#include <net.h>

/**
 * #define this to dump device status and queue info during initialization and
 * following errors.
 */
#undef EP93XX_MAC_DEBUG

/**
 * Number of descriptor and status entries in our RX queues.
 * It must be power of 2 !
 */
#define NUMRXDESC		PKTBUFSRX

/**
 * Number of descriptor and status entries in our TX queues.
 */
#define NUMTXDESC		1

/**
 * 944 = (1024 - 64) - 16, Fifo size - Minframesize - 16 (Chip FACT)
 */
#define TXSTARTMAX		944

/**
 * Receive descriptor queue entry
 */
struct rx_descriptor {
	uint32_t word1;
	uint32_t word2;
} __attribute__((packed));

/**
 * Receive status queue entry
 */
struct rx_status {
	uint32_t word1;
	uint32_t word2;
} __attribute__((packed));

#define RX_STATUS_RWE(rx_status) ((rx_status->word1 >> 30) & 0x01)
#define RX_STATUS_RFP(rx_status) ((rx_status->word1 >> 31) & 0x01)
#define RX_STATUS_FRAME_LEN(rx_status) (rx_status->word2 & 0xFFFF)


/**
 * Transmit descriptor queue entry
 */
struct tx_descriptor {
	uint32_t word1;
	uint32_t word2;
} __attribute__((packed));

#define TX_DESC_EOF (1 << 31)

/**
 * Transmit status queue entry
 */
struct tx_status {
	uint32_t word1;
} __attribute__((packed));

#define TX_STATUS_TXWE(tx_status) (((tx_status)->word1 >> 30) & 0x01)
#define TX_STATUS_TXFP(tx_status) (((tx_status)->word1 >> 31) & 0x01)

/**
 * Transmit descriptor queue
 */
struct tx_descriptor_queue {
	struct tx_descriptor *base;
	struct tx_descriptor *current;
	struct tx_descriptor *end;
};

/**
 * Transmit status queue
 */
struct tx_status_queue {
	struct tx_status *base;
	volatile struct tx_status *current;
	struct tx_status *end;
};

/**
 * Receive descriptor queue
 */
struct rx_descriptor_queue {
	struct rx_descriptor *base;
	struct rx_descriptor *current;
	struct rx_descriptor *end;
};

/**
 * Receive status queue
 */
struct rx_status_queue {
	struct rx_status *base;
	volatile struct rx_status *current;
	struct rx_status *end;
};

/**
 * EP93xx MAC private data structure
 */
struct ep93xx_eth_priv {
	struct mac_regs			*regs;

	struct rx_descriptor_queue	rx_dq;
	struct rx_status_queue		rx_sq;
	void				*rx_buffer[NUMRXDESC];

	struct tx_descriptor_queue	tx_dq;
	struct tx_status_queue		tx_sq;

	int				phy_addr;
	phy_interface_t			interface;
	struct mii_bus miibus;
};

#endif