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
193
194
195
196
197
198
199
200
201
202
203
|
/*
* (C) Copyright 2001
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <i2c.h>
#include "eric.h"
#include <asm/processor.h>
#define PPC405GP_GPIO0_OR 0xef600700 /* GPIO Output */
#define PPC405GP_GPIO0_TCR 0xef600704 /* GPIO Three-State Control */
#define PPC405GP_GPIO0_ODR 0xef600718 /* GPIO Open Drain */
#define PPC405GP_GPIO0_IR 0xef60071c /* GPIO Input */
void sdram_init(void);
int board_early_init_f (void)
{
/*-------------------------------------------------------------------------+
| Interrupt controller setup for the ERIC board.
| Note: IRQ 0-15 405GP internally generated; active high; level sensitive
| IRQ 16 405GP internally generated; active low; level sensitive
| IRQ 17-24 RESERVED
| IRQ 25 (EXT IRQ 0) FLASH; active low; level sensitive
| IRQ 26 (EXT IRQ 1) PHY ; active low; level sensitive
| IRQ 27 (EXT IRQ 2) HOST FAIL, active low; level sensitive
| indicates NO Power or HOST RESET active
| check GPIO7 (HOST RESET#) and GPIO8 (NO Power#)
| for real IRQ source
| IRQ 28 (EXT IRQ 3) HOST; active high; level sensitive
| IRQ 29 (EXT IRQ 4) PCI INTC#; active low; level sensitive
| IRQ 30 (EXT IRQ 5) PCI INTB#; active low; level sensitive
| IRQ 31 (EXT IRQ 6) PCI INTA#; active low; level sensitive
| -> IRQ6 Pin is NOW GPIO23 and can be activateted by setting
| PPC405GP_GPIO0_TCR Bit 0 = 1 (driving the output as defined in PPC405GP_GPIO0_OR,
| else tristate)
| Note for ERIC board:
| An interrupt taken for the HOST (IRQ 28) indicates that
| the HOST wrote a "1" to one of the following locations
| - VGA CRT_GPIO0 (if R1216 is loaded)
| - VGA CRT_GPIO1 (if R1217 is loaded)
|
+-------------------------------------------------------------------------*/
mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */
mtdcr (uicer, 0x00000000); /* disable all ints */
mtdcr (uiccr, 0x00000000); /* set all SMI to be non-critical */
mtdcr (uicpr, 0xFFFFFF88); /* set int polarities; IRQ3 to 1 */
mtdcr (uictr, 0x10000000); /* set int trigger levels, UART0 is EDGE */
mtdcr (uicvcr, 0x00000001); /* set vect base=0,INT0 highest priority */
mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */
mtdcr (cntrl0, 0x00002000); /* set IRQ6 as GPIO23 to generate an interrupt request to the PCP2PCI bridge */
out32 (PPC405GP_GPIO0_OR, 0x60000000); /*fixme is SMB_INT high or low active??; IRQ6 is GPIO23 output */
out32 (PPC405GP_GPIO0_TCR, 0x7E400000);
return 0;
}
/* ------------------------------------------------------------------------- */
/*
* Check Board Identity:
*/
int checkboard (void)
{
char *s = getenv ("serial#");
char *e;
puts ("Board: ");
if (!s || strncmp (s, "ERIC", 9)) {
puts ("### No HW ID - assuming ERIC");
} else {
for (e = s; *e; ++e) {
if (*e == ' ')
break;
}
for (; s < e; ++s) {
putc (*s);
}
}
putc ('\n');
return (0);
}
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
/*
initdram(int board_type) reads EEPROM via I2c. EEPROM contains all of
the necessary info for SDRAM controller configuration
*/
/* ------------------------------------------------------------------------- */
/* ------------------------------------------------------------------------- */
phys_size_t initdram (int board_type)
{
#ifndef CONFIG_ERIC
int i;
unsigned char datain[128];
int TotalSize;
#endif
/*
* ToDo: Move the asm init routine sdram_init() to this C file,
* or even better use some common ppc4xx code available
* in cpu/ppc4xx
*/
sdram_init();
#ifdef CONFIG_ERIC
/*
* we have no EEPROM on ERIC
* so let init.S do the init job for SDRAM
* and simply return 32MByte here
*/
return (CFG_SDRAM_SIZE * 1024 * 1024);
#else
/* Read Serial Presence Detect Information */
for (i = 0; i < 128; i++)
datain[i] = 127;
i2c_send (SPD_EEPROM_ADDRESS, 0, 1, datain, 128);
printf ("\nReading DIMM...\n");
#if 0
for (i = 0; i < 128; i++) {
printf ("%d=0x%x ", i, datain[i]);
if (((i + 1) % 10) == 0)
printf ("\n");
}
printf ("\n");
#endif
/*****************************/
/* Retrieve interesting data */
/*****************************/
/* size of a SDRAM bank */
/* Number of bytes per side / number of banks per side */
if (datain[31] == 0x08)
TotalSize = 32;
else if (datain[31] == 0x10)
TotalSize = 64;
else {
printf ("IIC READ ERROR!!!\n");
TotalSize = 32;
}
/* single-sided DIMM or double-sided DIMM? */
if (datain[5] != 1) {
/* double-sided DIMM => SDRAM banks 0..3 are valid */
printf ("double-sided DIMM\n");
TotalSize *= 2;
}
/* else single-sided DIMM => SDRAM bank 0 and bank 2 are valid */
else {
printf ("single-sided DIMM\n");
}
/* return size in Mb unit => *(1024*1024) */
return (TotalSize * 1024 * 1024);
#endif
}
/* ------------------------------------------------------------------------- */
int testdram (void)
{
/* TODO: XXX XXX XXX */
printf ("test: xxx MB - ok\n");
return (0);
}
/* ------------------------------------------------------------------------- */
|
