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https://github.com/brain-hackers/u-boot-brain
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3887c3fbdb
U-Boot can detect if an IDE device is present or not. If not, and this new config option is activated, U-Boot removes the ATA node from the DTS before booting Linux, so the Linux IDE driver does not probe the device and crash. This is needed for buggy hardware (uc101) where no pull down resistor is connected to the signal IDE5V_DD7. Signed-off-by: Heiko Schocher <hs@denx.de>
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _IDE_H
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#define _IDE_H
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#define IDE_BUS(dev) (dev >> 1)
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#define ATA_CURR_BASE(dev) (CONFIG_SYS_ATA_BASE_ADDR+ide_bus_offset[IDE_BUS(dev)])
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#ifdef CONFIG_IDE_LED
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/*
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* LED Port
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*/
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#define LED_PORT ((uchar *)(PER8_BASE + 0x3000))
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#define LED_IDE1 0x01
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#define LED_IDE2 0x02
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#define DEVICE_LED(d) ((d & 2) | ((d & 2) == 0)) /* depends on bit positions! */
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#endif /* CONFIG_IDE_LED */
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#ifdef CONFIG_SYS_64BIT_LBA
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typedef uint64_t lbaint_t;
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#else
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typedef ulong lbaint_t;
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#endif
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/*
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* Function Prototypes
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*/
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void ide_init(void);
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ulong ide_read(int device, lbaint_t blknr, ulong blkcnt, void *buffer);
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ulong ide_write(int device, lbaint_t blknr, ulong blkcnt, void *buffer);
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#if defined(CONFIG_OF_IDE_FIXUP)
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int ide_device_present(int dev);
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#endif
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#endif /* _IDE_H */
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