mirror of
https://github.com/brain-hackers/u-boot-brain
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94fc751d8a
This introduces code to read the value of the SYS_BOOT pins on the OMAP4, as well as the memory-preferred scheme for the interpretation of each value. Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
/*
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* OMAP4 boot
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*
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* Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/omap_common.h>
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#include <spl.h>
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static u32 boot_devices[] = {
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BOOT_DEVICE_MMC2,
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BOOT_DEVICE_XIP,
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BOOT_DEVICE_XIPWAIT,
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BOOT_DEVICE_NAND,
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BOOT_DEVICE_XIPWAIT,
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BOOT_DEVICE_MMC1,
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BOOT_DEVICE_ONENAND,
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BOOT_DEVICE_ONENAND,
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BOOT_DEVICE_MMC2,
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BOOT_DEVICE_ONENAND,
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BOOT_DEVICE_XIPWAIT,
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BOOT_DEVICE_NAND,
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BOOT_DEVICE_NAND,
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BOOT_DEVICE_MMC1,
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BOOT_DEVICE_ONENAND,
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BOOT_DEVICE_MMC2,
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BOOT_DEVICE_XIP,
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BOOT_DEVICE_XIPWAIT,
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BOOT_DEVICE_NAND,
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BOOT_DEVICE_MMC1,
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BOOT_DEVICE_MMC1,
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BOOT_DEVICE_ONENAND,
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BOOT_DEVICE_MMC2,
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BOOT_DEVICE_XIP,
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BOOT_DEVICE_MMC2_2,
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BOOT_DEVICE_NAND,
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BOOT_DEVICE_MMC2_2,
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BOOT_DEVICE_MMC1,
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BOOT_DEVICE_MMC2_2,
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BOOT_DEVICE_MMC2_2,
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BOOT_DEVICE_NONE,
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BOOT_DEVICE_XIPWAIT,
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};
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u32 omap_sys_boot_device(void)
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{
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u32 sys_boot;
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/* Grab the first 5 bits of the status register for SYS_BOOT. */
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sys_boot = readl((u32 *) (*ctrl)->control_status) & ((1 << 5) - 1);
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if (sys_boot >= (sizeof(boot_devices) / sizeof(u32)))
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return BOOT_DEVICE_NONE;
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return boot_devices[sys_boot];
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}
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