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wdenk16f21702002-08-26 21:58:50 +00001/*
2 * (C) Copyright 2001
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <i2c.h>
26#include "eric.h"
27#include <asm/processor.h>
28
Wolfgang Denk0c8721a2005-09-23 11:05:55 +020029#define PPC405GP_GPIO0_OR 0xef600700 /* GPIO Output */
30#define PPC405GP_GPIO0_TCR 0xef600704 /* GPIO Three-State Control */
31#define PPC405GP_GPIO0_ODR 0xef600718 /* GPIO Open Drain */
32#define PPC405GP_GPIO0_IR 0xef60071c /* GPIO Input */
wdenk16f21702002-08-26 21:58:50 +000033
Stefan Roesebbeff302008-06-02 17:37:28 +020034void sdram_init(void);
35
wdenkc837dcb2004-01-20 23:12:12 +000036int board_early_init_f (void)
wdenk16f21702002-08-26 21:58:50 +000037{
38
39 /*-------------------------------------------------------------------------+
40 | Interrupt controller setup for the ERIC board.
41 | Note: IRQ 0-15 405GP internally generated; active high; level sensitive
42 | IRQ 16 405GP internally generated; active low; level sensitive
43 | IRQ 17-24 RESERVED
44 | IRQ 25 (EXT IRQ 0) FLASH; active low; level sensitive
45 | IRQ 26 (EXT IRQ 1) PHY ; active low; level sensitive
46 | IRQ 27 (EXT IRQ 2) HOST FAIL, active low; level sensitive
47 | indicates NO Power or HOST RESET active
48 | check GPIO7 (HOST RESET#) and GPIO8 (NO Power#)
49 | for real IRQ source
50 | IRQ 28 (EXT IRQ 3) HOST; active high; level sensitive
51 | IRQ 29 (EXT IRQ 4) PCI INTC#; active low; level sensitive
52 | IRQ 30 (EXT IRQ 5) PCI INTB#; active low; level sensitive
53 | IRQ 31 (EXT IRQ 6) PCI INTA#; active low; level sensitive
54 | -> IRQ6 Pin is NOW GPIO23 and can be activateted by setting
Wolfgang Denk0c8721a2005-09-23 11:05:55 +020055 | PPC405GP_GPIO0_TCR Bit 0 = 1 (driving the output as defined in PPC405GP_GPIO0_OR,
wdenk16f21702002-08-26 21:58:50 +000056 | else tristate)
57 | Note for ERIC board:
58 | An interrupt taken for the HOST (IRQ 28) indicates that
59 | the HOST wrote a "1" to one of the following locations
60 | - VGA CRT_GPIO0 (if R1216 is loaded)
61 | - VGA CRT_GPIO1 (if R1217 is loaded)
62 |
63 +-------------------------------------------------------------------------*/
64
Stefan Roese952e7762009-09-24 09:55:50 +020065 mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */
66 mtdcr (UIC0ER, 0x00000000); /* disable all ints */
67 mtdcr (UIC0CR, 0x00000000); /* set all SMI to be non-critical */
68 mtdcr (UIC0PR, 0xFFFFFF88); /* set int polarities; IRQ3 to 1 */
69 mtdcr (UIC0TR, 0x10000000); /* set int trigger levels, UART0 is EDGE */
70 mtdcr (UIC0VCR, 0x00000001); /* set vect base=0,INT0 highest priority */
71 mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */
wdenk16f21702002-08-26 21:58:50 +000072
Stefan Roesed1c3b272009-09-09 16:25:29 +020073 mtdcr (CPC0_CR0, 0x00002000); /* set IRQ6 as GPIO23 to generate an interrupt request to the PCP2PCI bridge */
wdenk16f21702002-08-26 21:58:50 +000074
Wolfgang Denk0c8721a2005-09-23 11:05:55 +020075 out32 (PPC405GP_GPIO0_OR, 0x60000000); /*fixme is SMB_INT high or low active??; IRQ6 is GPIO23 output */
76 out32 (PPC405GP_GPIO0_TCR, 0x7E400000);
wdenk16f21702002-08-26 21:58:50 +000077
78 return 0;
79}
80
81
82/* ------------------------------------------------------------------------- */
83
84/*
85 * Check Board Identity:
86 */
87
88int checkboard (void)
89{
Wolfgang Denk77ddac92005-10-13 16:45:02 +020090 char *s = getenv ("serial#");
91 char *e;
wdenk16f21702002-08-26 21:58:50 +000092
93 puts ("Board: ");
94
95 if (!s || strncmp (s, "ERIC", 9)) {
96 puts ("### No HW ID - assuming ERIC");
97 } else {
98 for (e = s; *e; ++e) {
99 if (*e == ' ')
100 break;
101 }
102
103 for (; s < e; ++s) {
104 putc (*s);
105 }
106 }
107
108
109 putc ('\n');
110
111 return (0);
112}
113
114
115/* ------------------------------------------------------------------------- */
116/* ------------------------------------------------------------------------- */
117/* ------------------------------------------------------------------------- */
118/*
119 initdram(int board_type) reads EEPROM via I2c. EEPROM contains all of
120 the necessary info for SDRAM controller configuration
121*/
122/* ------------------------------------------------------------------------- */
123/* ------------------------------------------------------------------------- */
Becky Bruce9973e3c2008-06-09 16:03:40 -0500124phys_size_t initdram (int board_type)
wdenk16f21702002-08-26 21:58:50 +0000125{
126#ifndef CONFIG_ERIC
127 int i;
128 unsigned char datain[128];
129 int TotalSize;
130#endif
131
Stefan Roesebbeff302008-06-02 17:37:28 +0200132 /*
133 * ToDo: Move the asm init routine sdram_init() to this C file,
134 * or even better use some common ppc4xx code available
135 * in cpu/ppc4xx
136 */
137 sdram_init();
wdenk16f21702002-08-26 21:58:50 +0000138
139#ifdef CONFIG_ERIC
140 /*
141 * we have no EEPROM on ERIC
142 * so let init.S do the init job for SDRAM
143 * and simply return 32MByte here
144 */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200145 return (CONFIG_SYS_SDRAM_SIZE * 1024 * 1024);
wdenk16f21702002-08-26 21:58:50 +0000146#else
147
148 /* Read Serial Presence Detect Information */
149 for (i = 0; i < 128; i++)
150 datain[i] = 127;
151 i2c_send (SPD_EEPROM_ADDRESS, 0, 1, datain, 128);
152 printf ("\nReading DIMM...\n");
153#if 0
154 for (i = 0; i < 128; i++) {
155 printf ("%d=0x%x ", i, datain[i]);
156 if (((i + 1) % 10) == 0)
157 printf ("\n");
158 }
159 printf ("\n");
160#endif
161
162 /*****************************/
163 /* Retrieve interesting data */
164 /*****************************/
165 /* size of a SDRAM bank */
166 /* Number of bytes per side / number of banks per side */
167 if (datain[31] == 0x08)
168 TotalSize = 32;
169 else if (datain[31] == 0x10)
170 TotalSize = 64;
171 else {
172 printf ("IIC READ ERROR!!!\n");
173 TotalSize = 32;
174 }
175
176 /* single-sided DIMM or double-sided DIMM? */
177 if (datain[5] != 1) {
178 /* double-sided DIMM => SDRAM banks 0..3 are valid */
179 printf ("double-sided DIMM\n");
180 TotalSize *= 2;
181 }
182 /* else single-sided DIMM => SDRAM bank 0 and bank 2 are valid */
183 else {
184 printf ("single-sided DIMM\n");
185 }
186
187
188 /* return size in Mb unit => *(1024*1024) */
189 return (TotalSize * 1024 * 1024);
190#endif
191}
192
193/* ------------------------------------------------------------------------- */
194
195int testdram (void)
196{
197 /* TODO: XXX XXX XXX */
198 printf ("test: xxx MB - ok\n");
199
200 return (0);
201}
202
203/* ------------------------------------------------------------------------- */