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git.ipfire.org Git - people/ms/u-boot.git/blob - post/board/lwmon5/fpga.c
2 * (C) Copyright 2008 Dmitry Rakhchev, EmCraft Systems, rda@emcraft.com
4 * Developed for DENX Software Engineering GmbH
6 * See file CREDITS for list of people who contributed to this
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.
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.
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,
28 /* This test performs testing of FPGA SCRATCH register,
29 * gets FPGA version and run get_ram_size() on FPGA memory
36 DECLARE_GLOBAL_DATA_PTR
;
38 #define FPGA_SCRATCH_REG 0xC4000050
39 #define FPGA_VERSION_REG 0xC4000040
40 #define FPGA_RAM_START 0xC4200000
41 #define FPGA_RAM_END 0xC4203FFF
42 #define FPGA_STAT 0xC400000C
44 #if CONFIG_POST & CFG_POST_BSPEC3
46 static int one_scratch_test(uint value
)
51 out_be32((void *)FPGA_SCRATCH_REG
, value
);
52 /* read other location (protect against data lines capacity) */
53 ret
= in_be16((void *)FPGA_VERSION_REG
);
54 /* verify test pattern */
55 read_value
= in_be32((void *)FPGA_SCRATCH_REG
);
56 if (read_value
!= value
) {
57 post_log("FPGA SCRATCH test failed write %08X, read %08X\n",
65 /* Verify FPGA, get version & memory size */
66 int fpga_post_test(int flags
)
74 old_value
= in_be32((void *)FPGA_SCRATCH_REG
);
76 if (one_scratch_test(0x55555555))
78 if (one_scratch_test(0xAAAAAAAA))
81 out_be32((void *)FPGA_SCRATCH_REG
, old_value
);
83 version
= in_be16((void *)FPGA_VERSION_REG
);
84 post_log("FPGA : version %u.%u\n",
85 (version
>> 8) & 0xFF, version
& 0xFF);
87 /* Enable write to FPGA RAM */
88 out_be32((void *)FPGA_STAT
, in_be32((void *)FPGA_STAT
) | 0x1000);
90 read_value
= get_ram_size((void *)CFG_FPGA_BASE_1
, 0x4000);
91 post_log("FPGA RAM size: %d bytes\n", read_value
);
96 #endif /* CONFIG_POST & CFG_POST_BSPEC3 */
97 #endif /* CONFIG_POST */