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a75a57ef6e
This is a re-write of the NAND FSL UPM driver using the more universal
hwcontrol callback (instead of the cmdfunc callback). Here is a brief
list of furher modifications:
- For the time being, the UPM setup writing the UPM array has been
removed from the driver and must now be done by the board specific
code.
- The bus width definition in "struct fsl_upm_nand" is now in bits to
comply with the corresponding Linux driver and 8, 16 and 32 bit
accesses are supported.
- chip->dev_read is only set if fun->dev_ready != NULL, which is
required for boards not connecting the R/B pin.
- A few issue have been fixed with MxMR bit manipulation like in the
corresponding Linux driver.
Note: I think the "io_addr" field of "struct fsl_upm" could be removed
as well, because the address is already determined by
"nand->IO_ADDR_[RW]", but I'm not 100% sure.
This patch has been tested on a TQM8548 modules with the NAND chip
Micron MT29F8G08FABWP.
This patch is based on the following patches posted to this list a few
minutes ago:
PPC: add accessor macros to clear and set bits in one shot
83xx/85xx/86xx: add more MxMR local bus definitions
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Acked-by: Anton Vorontsov <avorontsov@ru.mvista.com>
38 lines
856 B
C
38 lines
856 B
C
/*
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* FSL UPM NAND driver
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*
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* Copyright (C) 2007 MontaVista Software, Inc.
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* Anton Vorontsov <avorontsov@ru.mvista.com>
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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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#ifndef __LINUX_MTD_NAND_FSL_UPM
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#define __LINUX_MTD_NAND_FSL_UPM
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#include <linux/mtd/nand.h>
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struct fsl_upm {
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void __iomem *mdr;
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void __iomem *mxmr;
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void __iomem *mar;
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void __iomem *io_addr;
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};
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struct fsl_upm_nand {
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struct fsl_upm upm;
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int width;
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int upm_cmd_offset;
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int upm_addr_offset;
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int wait_pattern;
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int (*dev_ready)(void);
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int chip_delay;
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};
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extern int fsl_upm_nand_init(struct nand_chip *chip, struct fsl_upm_nand *fun);
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#endif
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