]> git.ipfire.org Git - people/ms/u-boot.git/blob - post/board/lwmon5/gdc.c
rename CFG_ macros to CONFIG_SYS
[people/ms/u-boot.git] / post / board / lwmon5 / gdc.c
1 /*
2 * (C) Copyright 2008 Dmitry Rakhchev, EmCraft Systems, rda@emcraft.com
3 *
4 * Developed for DENX Software Engineering GmbH
5 *
6 * See file CREDITS for list of people who contributed to this
7 * project.
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22 * MA 02111-1307 USA
23 */
24 #include <common.h>
25
26 /* This test attempts to verify board GDC. A scratch register tested, then
27 * simple memory test (get_ram_size()) run over GDC memory.
28 */
29
30 #include <post.h>
31
32 #include <asm/io.h>
33
34 DECLARE_GLOBAL_DATA_PTR;
35
36 #define GDC_SCRATCH_REG 0xC1FF8044
37 #define GDC_VERSION_REG 0xC1FF8084
38 #define GDC_RAM_START 0xC0000000
39 #define GDC_RAM_END 0xC2000000
40
41 #if CONFIG_POST & CONFIG_SYS_POST_BSPEC4
42
43 static int gdc_test_reg_one(uint value)
44 {
45 int ret;
46 uint read_value;
47
48 /* write test pattern */
49 out_be32((void *)GDC_SCRATCH_REG, value);
50 /* read other location (protect against data lines capacity) */
51 ret = in_be32((void *)GDC_RAM_START);
52 /* verify test pattern */
53 read_value = in_be32((void *)GDC_SCRATCH_REG);
54 if (read_value != value) {
55 post_log("GDC SCRATCH test failed write %08X, read %08X\n",
56 value, read_value);
57 }
58
59 return (read_value != value);
60 }
61
62 /* Verify GDC, get memory size */
63 int gdc_post_test(int flags)
64 {
65 uint old_value;
66 int ret = 0;
67
68 post_log("\n");
69 old_value = in_be32((void *)GDC_SCRATCH_REG);
70
71 /*
72 * GPIOC2 register behaviour: the LIME graphics processor has a
73 * maximum of 5 GPIO ports that can be used in this hardware
74 * configuration. Thus only the bits for these 5 GPIOs can be
75 * activated in the GPIOC2 register. All other bits will always be
76 * read as zero.
77 */
78 if (gdc_test_reg_one(0x00150015))
79 ret = 1;
80 if (gdc_test_reg_one(0x000A000A))
81 ret = 1;
82
83 out_be32((void *)GDC_SCRATCH_REG, old_value);
84
85 old_value = in_be32((void *)GDC_VERSION_REG);
86 post_log("GDC chip version %u.%u, year %04X\n",
87 (old_value >> 8) & 0xFF, old_value & 0xFF,
88 (old_value >> 16) & 0xFFFF);
89
90 old_value = get_ram_size((void *)GDC_RAM_START,
91 GDC_RAM_END - GDC_RAM_START);
92 post_log("GDC RAM size: %d bytes\n", old_value);
93
94 return ret;
95 }
96 #endif /* CONFIG_POST & CONFIG_SYS_POST_BSPEC4 */