aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/i825xx/eexpress.h
blob: dc9c6ea289e95b7e54c8e32dd047d3d00705d8e0 (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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
/*
 * eexpress.h: Intel EtherExpress16 defines
 */

/*
 * EtherExpress card register addresses
 * as offsets from the base IO region (dev->base_addr)
 */

#define DATAPORT      0x0000
#define WRITE_PTR     0x0002
#define READ_PTR      0x0004
#define SIGNAL_CA     0x0006
#define SET_IRQ       0x0007
#define SM_PTR        0x0008
#define	MEM_Dec	      0x000a
#define MEM_Ctrl      0x000b
#define MEM_Page_Ctrl 0x000c
#define Config        0x000d
#define EEPROM_Ctrl   0x000e
#define ID_PORT       0x000f
#define	MEM_ECtrl     0x000f

/*
 * card register defines
 */

/* SET_IRQ */
#define SIRQ_en       0x08
#define SIRQ_dis      0x00

/* EEPROM_Ctrl */
#define EC_Clk        0x01
#define EC_CS         0x02
#define EC_Wr         0x04
#define EC_Rd         0x08
#define ASIC_RST      0x40
#define i586_RST      0x80

#define eeprom_delay() { udelay(40); }

/*
 * i82586 Memory Configuration
 */

/* (System Configuration Pointer) System start up block, read after 586_RST */
#define SCP_START 0xfff6

/* Intermediate System Configuration Pointer */
#define ISCP_START 0x0000

/* System Command Block */
#define SCB_START 0x0008

/* Start of buffer region.  Everything before this is used for control
 * structures and the CU configuration program.  The memory layout is
 * determined in eexp_hw_probe(), once we know how much memory is
 * available on the card.
 */

#define TX_BUF_START 0x0100

#define TX_BUF_SIZE ((24+ETH_FRAME_LEN+31)&~0x1f)
#define RX_BUF_SIZE ((32+ETH_FRAME_LEN+31)&~0x1f)

/*
 * SCB defines
 */

/* these functions take the SCB status word and test the relevant status bit */
#define SCB_complete(s) (((s) & 0x8000) != 0)
#define SCB_rxdframe(s) (((s) & 0x4000) != 0)
#define SCB_CUdead(s)   (((s) & 0x2000) != 0)
#define SCB_RUdead(s)   (((s) & 0x1000) != 0)
#define SCB_ack(s)      ((s) & 0xf000)

/* Command unit status: 0=idle, 1=suspended, 2=active */
#define SCB_CUstat(s)   (((s)&0x0300)>>8)

/* Receive unit status: 0=idle, 1=suspended, 2=out of resources, 4=ready */
#define SCB_RUstat(s)   (((s)&0x0070)>>4)

/* SCB commands */
#define SCB_CUnop       0x0000
#define SCB_CUstart     0x0100
#define SCB_CUresume    0x0200
#define SCB_CUsuspend   0x0300
#define SCB_CUabort     0x0400
#define SCB_resetchip   0x0080

#define SCB_RUnop       0x0000
#define SCB_RUstart     0x0010
#define SCB_RUresume    0x0020
#define SCB_RUsuspend   0x0030
#define SCB_RUabort     0x0040

/*
 * Command block defines
 */

#define Stat_Done(s)    (((s) & 0x8000) != 0)
#define Stat_Busy(s)    (((s) & 0x4000) != 0)
#define Stat_OK(s)      (((s) & 0x2000) != 0)
#define Stat_Abort(s)   (((s) & 0x1000) != 0)
#define Stat_STFail     (((s) & 0x0800) != 0)
#define Stat_TNoCar(s)  (((s) & 0x0400) != 0)
#define Stat_TNoCTS(s)  (((s) & 0x0200) != 0)
#define Stat_TNoDMA(s)  (((s) & 0x0100) != 0)
#define Stat_TDefer(s)  (((s) & 0x0080) != 0)
#define Stat_TColl(s)   (((s) & 0x0040) != 0)
#define Stat_TXColl(s)  (((s) & 0x0020) != 0)
#define Stat_NoColl(s)  ((s) & 0x000f)

/* Cmd_END will end AFTER the command if this is the first
 * command block after an SCB_CUstart, but BEFORE the command
 * for all subsequent commands. Best strategy is to place
 * Cmd_INT on the last command in the sequence, followed by a
 * dummy Cmd_Nop with Cmd_END after this.
 */

#define Cmd_END     0x8000
#define Cmd_SUS     0x4000
#define Cmd_INT     0x2000

#define Cmd_Nop     0x0000
#define Cmd_SetAddr 0x0001
#define Cmd_Config  0x0002
#define Cmd_MCast   0x0003
#define Cmd_Xmit    0x0004
#define Cmd_TDR     0x0005
#define Cmd_Dump    0x0006
#define Cmd_Diag    0x0007


/*
 * Frame Descriptor (Receive block) defines
 */

#define FD_Done(s)  (((s) & 0x8000) != 0)
#define FD_Busy(s)  (((s) & 0x4000) != 0)
#define FD_OK(s)    (((s) & 0x2000) != 0)

#define FD_CRC(s)   (((s) & 0x0800) != 0)
#define FD_Align(s) (((s) & 0x0400) != 0)
#define FD_Resrc(s) (((s) & 0x0200) != 0)
#define FD_DMA(s)   (((s) & 0x0100) != 0)
#define FD_Short(s) (((s) & 0x0080) != 0)
#define FD_NoEOF(s) (((s) & 0x0040) != 0)

struct rfd_header {
	volatile unsigned long flags;
	volatile unsigned short link;
	volatile unsigned short rbd_offset;
	volatile unsigned short dstaddr1;
	volatile unsigned short dstaddr2;
	volatile unsigned short dstaddr3;
	volatile unsigned short srcaddr1;
	volatile unsigned short srcaddr2;
	volatile unsigned short srcaddr3;
	volatile unsigned short length;

	/* This is actually a Receive Buffer Descriptor.  The way we
	 * arrange memory means that an RBD always follows the RFD that
	 * points to it, so they might as well be in the same structure.
	 */
	volatile unsigned short actual_count;
	volatile unsigned short next_rbd;
	volatile unsigned short buf_addr1;
	volatile unsigned short buf_addr2;
	volatile unsigned short size;
};

/* Returned data from the Time Domain Reflectometer */

#define TDR_LINKOK       (1<<15)
#define TDR_XCVRPROBLEM  (1<<14)
#define TDR_OPEN         (1<<13)
#define TDR_SHORT        (1<<12)
#define TDR_TIME         0x7ff