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Introduce a generic SPI read function: spi_write_chunked()

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Every SPI programmer driver had its own completely different chip write
implementation, and all of them were insufficiently commented. Create
spi_write_chunked as a copy of spi_read_chunked and convert all SPI
programmers to use it. No functional changes except: - Bus Pirate uses
12 Byte writes instead of 8 Byte writes - SB600 uses 5 Byte writes
instead of 1 Byte writes

Corresponding to flashrom svn r1005.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
Acked-by: David Hendricks <dhendrix@google.com>
This commit is contained in:
Carl-Daniel Hailfinger
2010-05-21 23:09:42 +00:00
parent d175e06ac3
commit 5824fbff01
7 changed files with 67 additions and 113 deletions
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21
bitbang_spi.c
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@ -1,7 +1,7 @@
/*
* This file is part of the flashrom project.
*
* Copyright (C) 2009 Carl-Daniel Hailfinger
* Copyright (C) 2009, 2010 Carl-Daniel Hailfinger
*
* 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
@ -142,24 +142,7 @@ int bitbang_spi_read(struct flashchip *flash, uint8_t *buf, int start, int len)
int bitbang_spi_write_256(struct flashchip *flash, uint8_t *buf)
{
int total_size = 1024 * flash->total_size;
int i;
msg_pdbg("total_size is %d\n", total_size);
for (i = 0; i < total_size; i += 256) {
int l, r;
if (i + 256 <= total_size)
l = 256;
else
l = total_size - i;
if ((r = spi_nbyte_program(i, &buf[i], l))) {
msg_perr("%s: write fail %d\n", __func__, r);
return 1;
}
while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP)
/* loop */;
}
return 0;
return spi_write_chunked(flash, buf, 0, total_size, 256);
}