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git01.mediatek.com / filogic / uboot / 87249baa2de055f6514d80ce29b33fcbbcfa3c46 / . / board / dave / PPChameleonEVB / flash.c
blob: d57c58d80faacc4b11533a13e2352850074d6749 [file] [log] [blame]
wdenk232fe0b2003-09-02 22:48:03 +0000[diff] [blame]1/*
2 * (C) Copyright 2001
3 * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
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 <ppc4xx.h>
26#include <asm/processor.h>
27
28/*
29 * include common flash code (for esd boards)
30 */
31#include "../common/flash.c"
32
33/*-----------------------------------------------------------------------
34 * Functions
35 */
36static ulong flash_get_size (vu_long * addr, flash_info_t * info);
37static void flash_get_offsets (ulong base, flash_info_t * info);
38
39/*-----------------------------------------------------------------------
40 */
41
42unsigned long flash_init (void)
43{
44#ifdef __DEBUG_START_FROM_SRAM__
45 return CFG_DUMMY_FLASH_SIZE;
46#else
47 unsigned long size_b0;
48 int i;
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]49 uint pbcr;
50 unsigned long base_b0;
wdenk232fe0b2003-09-02 22:48:03 +0000[diff] [blame]51 int size_val = 0;
52
53 /* Init: no FLASHes known */
54 for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
55 flash_info[i].flash_id = FLASH_UNKNOWN;
56 }
57
58 /* Static FLASH Bank configuration here - FIXME XXX */
59
60 size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
61
62 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
63 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
64 size_b0, size_b0<<20);
65 }
66
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]67 /* Setup offsets */
68 flash_get_offsets (-size_b0, &flash_info[0]);
wdenk232fe0b2003-09-02 22:48:03 +0000[diff] [blame]69
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]70 /* Re-do sizing to get full correct info */
71 mtdcr(ebccfga, pb0cr);
72 pbcr = mfdcr(ebccfgd);
73 mtdcr(ebccfga, pb0cr);
74 base_b0 = -size_b0;
wdenk232fe0b2003-09-02 22:48:03 +0000[diff] [blame]75 switch (size_b0) {
76 case 1 << 20:
77 size_val = 0;
78 break;
79 case 2 << 20:
80 size_val = 1;
81 break;
82 case 4 << 20:
83 size_val = 2;
84 break;
85 case 8 << 20:
86 size_val = 3;
87 break;
88 case 16 << 20:
89 size_val = 4;
90 break;
91 }
92 pbcr = (pbcr & 0x0001ffff) | base_b0 | (size_val << 17);
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]93 mtdcr(ebccfgd, pbcr);
wdenk232fe0b2003-09-02 22:48:03 +0000[diff] [blame]94
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]95 /* Monitor protection ON by default */
96 (void)flash_protect(FLAG_PROTECT_SET,
97 -CFG_MONITOR_LEN,
98 0xffffffff,
99 &flash_info[0]);
wdenk232fe0b2003-09-02 22:48:03 +0000[diff] [blame]100
wdenk9c53f402003-10-15 23:53:47 +0000[diff] [blame]101 flash_info[0].size = size_b0;
wdenk232fe0b2003-09-02 22:48:03 +0000[diff] [blame]102
103 return (size_b0);
104#endif
105}