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Diffstat (limited to 'post/board/lwmon5/dspic.c')
| -rw-r--r-- | post/board/lwmon5/dspic.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/post/board/lwmon5/dspic.c b/post/board/lwmon5/dspic.c new file mode 100644 index 0000000000..897a852e40 --- /dev/null +++ b/post/board/lwmon5/dspic.c @@ -0,0 +1,108 @@ +/* + * (C) Copyright 2008 Dmitry Rakhchev, EmCraft Systems, rda@emcraft.com + * + * Developed for DENX Software Engineering GmbH + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> + +#ifdef CONFIG_POST + +/* There are two tests for dsPIC currently implemented: + * 1. dsPIC ready test. Done in board_early_init_f(). Only result verified here. + * 2. dsPIC POST result test. This test gets dsPIC POST codes and version. + */ + +#include <post.h> + +#include <i2c.h> +#include <asm/io.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define DSPIC_POST_ERROR_REG 0x800 +#define DSPIC_SYS_ERROR_REG 0x802 +#define DSPIC_VERSION_REG 0x804 + +#if CONFIG_POST & CFG_POST_BSPEC1 + +/* Verify that dsPIC ready test done early at hw init passed ok */ +int dspic_init_post_test(int flags) +{ + if (in_be32((void *)CFG_DSPIC_TEST_ADDR) & CFG_DSPIC_TEST_MASK) { + post_log("dsPIC init test failed\n"); + return 1; + } + + return 0; +} + +#endif /* CONFIG_POST & CFG_POST_BSPEC1 */ + +#if CONFIG_POST & CFG_POST_BSPEC2 +/* Read a register from the dsPIC. */ +int dspic_read(ushort reg) +{ + uchar buf[2]; + + if (i2c_read(CFG_I2C_DSPIC_IO_ADDR, reg, 2, buf, 2)) + return -1; + + return (uint)((buf[0] << 8) | buf[1]); +} + +/* Verify error codes regs, display version */ +int dspic_post_test(int flags) +{ + int data; + int ret = 0; + + post_log("\n"); + data = dspic_read(DSPIC_VERSION_REG); + if (data == -1) { + post_log("dsPIC : failed read version\n"); + ret = 1; + } else { + post_log("dsPIC version: %u.%u\n", + (data >> 8) & 0xFF, data & 0xFF); + } + + data = dspic_read(DSPIC_POST_ERROR_REG); + if (data != 0) ret = 1; + if (data == -1) { + post_log("dsPIC : failed read POST code\n"); + } else { + post_log("dsPIC POST code 0x%04X\n", data); + } + + data = dspic_read(DSPIC_SYS_ERROR_REG); + if (data != 0) ret = 1; + if (data == -1) { + post_log("dsPIC : failed read system error\n"); + } else { + post_log("dsPIC SYS-ERROR code: 0x%04X\n", data); + } + + return ret; +} + +#endif /* CONFIG_POST & CFG_POST_BSPEC2 */ +#endif /* CONFIG_POST */ |