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
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/*
* 3c503.c A shared memory driver for Etherlink II board.
*
* Created: Dec. 20, 1996 by G. Falzoni <falzoni@marina.scn.de>
*
* Inspired by the TNET package by M. Ostrowski, the driver for Linux
* by D. Becker, the Crynwr 3c503 packet driver, and the Amoeba driver.
*
* It works in shared memory mode and should be used with the
* device driver for NS 8390 based cards of Minix. Programmed
* I/O could be used as well but would result in poor performance.
*/
#include <minix/drivers.h>
#include <minix/netdriver.h>
#include "local.h"
#include "dp8390.h"
#include "3c503.h"
#if ENABLE_3C503
extern u32_t system_hz;
#define MILLIS_TO_TICKS(m) (((m)*system_hz/1000)+1)
static void el2_init(dpeth_t *dep);
static void el2_stop(dpeth_t *dep);
/*===========================================================================*
* el2_init *
*===========================================================================*/
static void el2_init(dep)
dpeth_t * dep;
{
/* Initalize hardware and data structures. */
int ix, irq;
int sendq_nr;
int cntr;
/* Map the address PROM to lower I/O address range */
cntr = inb_el2(dep, EL2_CNTR);
outb_el2(dep, EL2_CNTR, cntr | ECNTR_SAPROM);
/* Read station address from PROM */
for (ix = EL2_EA0; ix <= EL2_EA5; ix += 1)
dep->de_address.na_addr[ix] = inb_el2(dep, ix);
/* Map the 8390 back to lower I/O address range */
outb_el2(dep, EL2_CNTR, cntr);
/* Enable memory, but turn off interrupts until we are ready */
outb_el2(dep, EL2_CFGR, ECFGR_IRQOFF);
dep->de_data_port = dep->de_dp8390_port = dep->de_base_port;
dep->de_prog_IO = 0; /* Programmed I/O not yet available */
/* Check width of data bus:
* 1. Write 0 to WTS bit. The board will drive it to 1 if it is a
* 16-bit card.
* 2. Select page 2
* 3. See if it is a 16-bit card
* 4. Select page 0
*/
outb_el2(dep, DP_CR, CR_PS_P0|CR_DM_ABORT|CR_STP);
outb_el2(dep, DP_DCR, 0);
outb_el2(dep, DP_CR, CR_PS_P2|CR_DM_ABORT|CR_STP);
dep->de_16bit = (inb_el2(dep, DP_DCR) & DCR_WTS) != 0;
outb_el2(dep, DP_CR, CR_PS_P0|CR_DM_ABORT|CR_STP);
/* Allocate one send buffer (1.5KB) per 8KB of on board memory. */
sendq_nr = (dep->de_ramsize - dep->de_offset_page) / 0x2000;
if (sendq_nr < 1)
sendq_nr = 1;
else if (sendq_nr > SENDQ_NR)
sendq_nr = SENDQ_NR;
dep->de_sendq_nr = sendq_nr;
for (ix = 0; ix < sendq_nr; ix++)
dep->de_sendq[ix].sq_sendpage = (ix * SENDQ_PAGES) + EL2_SM_START_PG;
dep->de_startpage = (ix * SENDQ_PAGES) + EL2_SM_START_PG;
dep->de_stoppage = EL2_SM_STOP_PG;
outb_el2(dep, EL2_STARTPG, dep->de_startpage);
outb_el2(dep, EL2_STOPPG, dep->de_stoppage);
/* Point the vector pointer registers somewhere ?harmless?. */
outb_el2(dep, EL2_VP2, 0xFF); /* Point at the ROM restart location */
outb_el2(dep, EL2_VP1, 0xFF); /* 0xFFFF:0000 (from original sources) */
outb_el2(dep, EL2_VP0, 0x00); /* - What for protected mode? */
/* Set interrupt level for 3c503 */
irq = (dep->de_irq &= ~DEI_DEFAULT); /* Strip the default flag. */
if (irq == 9) irq = 2;
if (irq < 2 || irq > 5) panic("bad 3c503 irq configuration: %d", irq);
outb_el2(dep, EL2_IDCFG, (0x04 << irq));
outb_el2(dep, EL2_DRQCNT, 0x08); /* Set burst size to 8 */
outb_el2(dep, EL2_DMAAH, EL2_SM_START_PG); /* Put start of TX */
outb_el2(dep, EL2_DMAAL, 0x00); /* buffer in the GA DMA reg */
outb_el2(dep, EL2_CFGR, ECFGR_NORM); /* Enable shared memory */
if (!debug) {
printf("%s: 3c503 at %X:%d:%lX\n",
netdriver_name(), dep->de_base_port, dep->de_irq,
dep->de_linmem + dep->de_offset_page);
} else {
printf("%s: 3Com Etherlink II %sat I/O address 0x%X, "
"memory address 0x%lX, irq %d\n",
netdriver_name(), dep->de_16bit ? "(16-bit) " : "",
dep->de_base_port,
dep->de_linmem + dep->de_offset_page,
dep->de_irq);
}
}
/*===========================================================================*
* el2_stop *
*===========================================================================*/
static void el2_stop(dep)
dpeth_t * dep;
{
/* Stops board by disabling interrupts. */
#if DEBUG
printf("%s: stopping Etherlink\n", netdriver_name());
#endif
outb_el2(dep, EL2_CFGR, ECFGR_IRQOFF);
return;
}
/*===========================================================================*
* el2_probe *
*===========================================================================*/
int el2_probe(dep)
dpeth_t * dep;
{
/* Probe for the presence of an EtherLink II card. Initialize memory
* addressing if card detected.
*/
int iobase, membase;
int thin;
/* Thin ethernet or AUI? */
thin = (dep->de_linmem & 1) ? ECNTR_AUI : ECNTR_THIN;
/* Location registers should have 1 bit set */
if (!(iobase = inb_el2(dep, EL2_IOBASE))) return 0;
if (!((membase = inb_el2(dep, EL2_MEMBASE)) & 0xF0)) return 0;
if ((iobase & (iobase - 1)) || (membase & (membase - 1))) return 0;
/* Resets board */
outb_el2(dep, EL2_CNTR, ECNTR_RESET | thin);
micro_delay(1000);
outb_el2(dep, EL2_CNTR, thin);
micro_delay(5000);
/* Map the address PROM to lower I/O address range */
outb_el2(dep, EL2_CNTR, ECNTR_SAPROM | thin);
if (inb_el2(dep, EL2_EA0) != 0x02 || /* Etherlink II Station address */
inb_el2(dep, EL2_EA1) != 0x60 || /* MUST be 02:60:8c:xx:xx:xx */
inb_el2(dep, EL2_EA2) != 0x8C)
return 0; /* No Etherlink board at this address */
/* Map the 8390 back to lower I/O address range */
outb_el2(dep, EL2_CNTR, thin);
/* Setup shared memory addressing for 3c503 */
dep->de_linmem = ((membase & 0xC0) ? EL2_BASE_0D8000 : EL2_BASE_0C8000) +
((membase & 0xA0) ? (EL2_BASE_0CC000 - EL2_BASE_0C8000) : 0x0000);
dep->de_offset_page = (EL2_SM_START_PG * DP_PAGESIZE);
dep->de_ramsize = (EL2_SM_STOP_PG - EL2_SM_START_PG) * DP_PAGESIZE;
/* (Bad kludge, something Philip needs to look into. -- kjb) */
dep->de_linmem -= dep->de_offset_page;
dep->de_ramsize += dep->de_offset_page;
/* Board initialization and stop functions */
dep->de_initf = el2_init;
dep->de_stopf = el2_stop;
return 1;
}
#endif /* ENABLE_3C503 */
/** 3c503.c **/
/*
* $PchId: 3c503.c,v 1.3 2003/09/10 15:33:04 philip Exp $
*/
|
