Add support for AMCC Bamboo PPC440EP eval board
[platform/kernel/u-boot.git] / board / amcc / bamboo / flash.c
1 /*
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 #include <ppc440.h>
38 #include "bamboo.h"
39
40 #undef DEBUG
41
42 #ifdef DEBUG
43 #define DEBUGF(x...) printf(x)
44 #else
45 #define DEBUGF(x...)
46 #endif                          /* DEBUG */
47
48 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];   /* info for FLASH chips        */
49
50 /*
51  * Mark big flash bank (16 bit instead of 8 bit access) in address with bit 0
52  */
53 static unsigned long flash_addr_table[8][CFG_MAX_FLASH_BANKS] = {
54         {0x87800001, 0xFFF00000, 0xFFF80000}, /* 0:boot from small flash */
55         {0x00000000, 0x00000000, 0x00000000}, /* 1:boot from pci 66      */
56         {0x00000000, 0x00000000, 0x00000000}, /* 2:boot from nand flash  */
57         {0x87800000, 0x87880000, 0xFF800001}, /* 3:boot from big flash 33*/
58         {0x87800000, 0x87880000, 0xFF800001}, /* 4:boot from big flash 66*/
59         {0x00000000, 0x00000000, 0x00000000}, /* 5:boot from             */
60         {0x00000000, 0x00000000, 0x00000000}, /* 6:boot from pci 66      */
61         {0x00000000, 0x00000000, 0x00000000}, /* 7:boot from             */
62 };
63
64 /*
65  * include common flash code (for amcc boards)
66  */
67 #include "../common/flash.c"
68
69 /*-----------------------------------------------------------------------
70  * Functions
71  */
72 static ulong flash_get_size(vu_long * addr, flash_info_t * info);
73 static int write_word(flash_info_t * info, ulong dest, ulong data);
74
75 /*-----------------------------------------------------------------------
76  */
77
78 unsigned long flash_init(void)
79 {
80         unsigned long total_b = 0;
81         unsigned long size_b[CFG_MAX_FLASH_BANKS];
82         unsigned short index = 0;
83         int i;
84         unsigned long val;
85         unsigned long ebc_boot_size;
86         unsigned long boot_selection;
87
88         mfsdr(sdr_pstrp0, val);
89         index = (val & SDR0_PSTRP0_BOOTSTRAP_MASK) >> 29;
90
91         if ((index == 5) || (index == 7)) {
92                 /*
93                  * Boot Settings in IIC EEprom address 0xA8 or 0xA4
94                  * Read Serial Device Strap Register1 in PPC440EP
95                  */
96                 mfsdr(sdr_sdstp1, val);
97                 boot_selection  = val & SDR0_SDSTP1_BOOT_SEL_MASK;
98                 ebc_boot_size   = val & SDR0_SDSTP1_EBC_ROM_BS_MASK;
99
100                 switch(boot_selection) {
101                 case SDR0_SDSTP1_BOOT_SEL_EBC:
102                         switch(ebc_boot_size) {
103                         case SDR0_SDSTP1_EBC_ROM_BS_16BIT:
104                                 index = 3;
105                                 break;
106                         case SDR0_SDSTP1_EBC_ROM_BS_8BIT:
107                                 index = 0;
108                                 break;
109                         }
110                         break;
111
112                 case SDR0_SDSTP1_BOOT_SEL_PCI:
113                         index = 1;
114                         break;
115
116                 case SDR0_SDSTP1_BOOT_SEL_NDFC:
117                         index = 2;
118                         break;
119                 }
120         }
121
122         DEBUGF("\n");
123         DEBUGF("FLASH: Index: %d\n", index);
124
125         /* Init: no FLASHes known */
126         for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
127                 flash_info[i].flash_id = FLASH_UNKNOWN;
128                 flash_info[i].sector_count = -1;
129                 flash_info[i].size = 0;
130
131                 /* check whether the address is 0 */
132                 if (flash_addr_table[index][i] == 0) {
133                         continue;
134                 }
135
136                 /* call flash_get_size() to initialize sector address */
137                 size_b[i] = flash_get_size((vu_long *) flash_addr_table[index][i],
138                                    &flash_info[i]);
139                 flash_info[i].size = size_b[i];
140                 if (flash_info[i].flash_id == FLASH_UNKNOWN) {
141                         printf("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
142                                i, size_b[i], size_b[i] << 20);
143                         flash_info[i].sector_count = -1;
144                         flash_info[i].size = 0;
145                 }
146
147                 /* Monitor protection ON by default */
148                 (void)flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE,
149                                     CFG_MONITOR_BASE + CFG_MONITOR_LEN - 1,
150                                     &flash_info[i]);
151 #if defined(CFG_ENV_IS_IN_FLASH)
152                 (void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR,
153                                     CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1,
154                                     &flash_info[i]);
155 #if defined(CFG_ENV_IS_IN_FLASH) && defined(CFG_ENV_ADDR_REDUND)
156                 (void)flash_protect(FLAG_PROTECT_SET, CFG_ENV_ADDR_REDUND,
157                                     CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1,
158                                     &flash_info[i]);
159 #endif
160 #endif
161
162                 total_b += flash_info[i].size;
163         }
164
165         return total_b;
166 }