blob: 5614e20780ad4e627c813366da57c6ddca376cd7 [file] [log] [blame]
Stefan Roese8a316c92005-08-01 16:49:12 +02001/*
2 * (C) Copyright 2004-2005
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * (C) Copyright 2002 Jun Gu <jung@artesyncp.com>
6 * Add support for Am29F016D and dynamic switch setting.
7 *
8 * See file CREDITS for list of people who contributed to this
9 * project.
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 * MA 02111-1307 USA
25 */
26
27/*
28 * Modified 4/5/2001
29 * Wait for completion of each sector erase command issued
30 * 4/5/2001
31 * Chris Hallinan - DS4.COM, Inc. - clh@net1plus.com
32 */
33
34#include <common.h>
35#include <ppc4xx.h>
36#include <asm/processor.h>
37
38#undef DEBUG
39
40#ifdef DEBUG
41#define DEBUGF(x...) printf(x)
42#else
43#define DEBUGF(x...)
44#endif /* DEBUG */
45
46#define BOOT_SMALL_FLASH 0x40 /* 01000000 */
47#define FLASH_ONBD_N 2 /* 00000010 */
48#define FLASH_SRAM_SEL 1 /* 00000001 */
49#define FLASH_ONBD_N 2 /* 00000010 */
50#define FLASH_SRAM_SEL 1 /* 00000001 */
51
52#define BOOT_SMALL_FLASH_VAL 4
53#define FLASH_ONBD_N_VAL 2
54#define FLASH_SRAM_SEL_VAL 1
55
56flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
57
58static unsigned long flash_addr_table[8][CFG_MAX_FLASH_BANKS] = {
59 {0xFF800000, 0xFF880000, 0xFFC00000}, /* 0:000: configuraton 4 */
60 {0xFF900000, 0xFF980000, 0xFFC00000}, /* 1:001: configuraton 3 */
61 {0x00000000, 0x00000000, 0x00000000}, /* 2:010: configuraton 8 */
62 {0x00000000, 0x00000000, 0x00000000}, /* 3:011: configuraton 7 */
63 {0xFFE00000, 0xFFF00000, 0xFF800000}, /* 4:100: configuraton 2 */
64 {0xFFF00000, 0xFFF80000, 0xFF800000}, /* 5:101: configuraton 1 */
65 {0x00000000, 0x00000000, 0x00000000}, /* 6:110: configuraton 6 */
66 {0x00000000, 0x00000000, 0x00000000} /* 7:111: configuraton 5 */
67};
68
69/*
70 * include common flash code (for amcc boards)
71 */
72#include "../common/flash.c"
73
74/*-----------------------------------------------------------------------
75 * Functions
76 */
77static ulong flash_get_size(vu_long * addr, flash_info_t * info);
78static int write_word(flash_info_t * info, ulong dest, ulong data);
79
80/*-----------------------------------------------------------------------
81 */
82
83unsigned long flash_init(void)
84{
85 unsigned long total_b = 0;
86 unsigned long size_b[CFG_MAX_FLASH_BANKS];
87 unsigned char *fpga_base = (unsigned char *)CFG_FPGA_BASE;
88 unsigned char switch_status;
89 unsigned short index = 0;
90 int i;
91
92 /* read FPGA base register FPGA_REG0 */
93 switch_status = *fpga_base;
94
95 /* check the bitmap of switch status */
96 if (switch_status & BOOT_SMALL_FLASH) {
97 index += BOOT_SMALL_FLASH_VAL;
98 }
99 if (switch_status & FLASH_ONBD_N) {
100 index += FLASH_ONBD_N_VAL;
101 }
102 if (switch_status & FLASH_SRAM_SEL) {
103 index += FLASH_SRAM_SEL_VAL;
104 }
105
106 DEBUGF("\n");
107 DEBUGF("FLASH: Index: %d\n", index);
108
109 /* Init: no FLASHes known */
110 for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
111 flash_info[i].flash_id = FLASH_UNKNOWN;
112 flash_info[i].sector_count = -1;
113 flash_info[i].size = 0;
114
115 /* check whether the address is 0 */
116 if (flash_addr_table[index][i] == 0) {
117 continue;
118 }
119
120 /* call flash_get_size() to initialize sector address */
121 size_b[i] =
122 flash_get_size((vu_long *) flash_addr_table[index][i],
123 &flash_info[i]);
124 flash_info[i].size = size_b[i];
125 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
126 printf
127 ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
128 i, size_b[i], size_b[i] << 20);
129 flash_info[i].sector_count = -1;
130 flash_info[i].size = 0;
131 }
132
133 /* Monitor protection ON by default */
134 (void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
135 CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
136 &flash_info[i]);
137#ifdef CFG_ENV_IS_IN_FLASH
138 (void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR,
139 CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
140 &flash_info[i]);
141 (void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR_REDUND,
142 CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1,
143 &flash_info[i]);
144#endif
145
146 total_b += flash_info[i].size;
147 }
148
149 return total_b;
150}