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c021880a WD |
1 | /* |
2 | * (C) Copyright 2003 | |
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 <command.h> | |
26 | #include <asm/addrspace.h> | |
27 | #include <asm/inca-ip.h> | |
28 | ||
29 | ||
85ec0bcc WD |
30 | extern uint incaip_get_cpuclk(void); |
31 | ||
c021880a WD |
32 | static ulong max_sdram_size(void) |
33 | { | |
34 | /* The only supported SDRAM data width is 16bit. | |
35 | */ | |
36 | #define CFG_DW 2 | |
37 | ||
38 | /* The only supported number of SDRAM banks is 4. | |
39 | */ | |
40 | #define CFG_NB 4 | |
41 | ||
42 | ulong cfgpb0 = *INCA_IP_SDRAM_MC_CFGPB0; | |
43 | int cols = cfgpb0 & 0xF; | |
44 | int rows = (cfgpb0 & 0xF0) >> 4; | |
45 | ulong size = (1 << (rows + cols)) * CFG_DW * CFG_NB; | |
46 | ||
47 | return size; | |
48 | } | |
49 | ||
c021880a WD |
50 | long int initdram(int board_type) |
51 | { | |
52 | int rows, cols, best_val = *INCA_IP_SDRAM_MC_CFGPB0; | |
53 | ulong size, max_size = 0; | |
54 | ulong our_address; | |
55 | ||
56 | asm volatile ("move %0, $25" : "=r" (our_address) :); | |
57 | ||
58 | /* Can't probe for RAM size unless we are running from Flash. | |
59 | */ | |
60 | if (PHYSADDR(our_address) < PHYSADDR(PHYS_FLASH_1)) | |
61 | { | |
62 | return max_sdram_size(); | |
63 | } | |
64 | ||
65 | for (cols = 0x8; cols <= 0xC; cols++) | |
66 | { | |
67 | for (rows = 0xB; rows <= 0xD; rows++) | |
68 | { | |
69 | *INCA_IP_SDRAM_MC_CFGPB0 = (0x14 << 8) | | |
70 | (rows << 4) | cols; | |
c83bf6a2 | 71 | size = get_ram_size((ulong *)CFG_SDRAM_BASE, |
c021880a WD |
72 | max_sdram_size()); |
73 | ||
74 | if (size > max_size) | |
75 | { | |
76 | best_val = *INCA_IP_SDRAM_MC_CFGPB0; | |
77 | max_size = size; | |
78 | } | |
79 | } | |
80 | } | |
81 | ||
82 | *INCA_IP_SDRAM_MC_CFGPB0 = best_val; | |
83 | return max_size; | |
84 | } | |
85 | ||
85ec0bcc WD |
86 | int checkboard (void) |
87 | { | |
88 | ||
89 | unsigned long chipid = *INCA_IP_WDT_CHIPID; | |
90 | int part_num; | |
91 | ||
92 | puts ("Board: INCA-IP "); | |
93 | part_num = (chipid >> 12) & 0xffff; | |
94 | switch (part_num) { | |
95 | case 0xc0: | |
96 | printf ("Standard Version, "); | |
97 | break; | |
98 | case 0xc1: | |
99 | printf ("Basic Version, "); | |
100 | break; | |
101 | default: | |
102 | printf ("Unknown Part Number 0x%x ", part_num); | |
103 | break; | |
104 | } | |
105 | ||
106 | printf ("Chip V1.%ld, ", (chipid >> 28)); | |
107 | ||
108 | printf("CPU Speed %d MHz\n", incaip_get_cpuclk()/1000000); | |
109 | ||
110 | return 0; | |
111 | } |