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Date: Fri, 10 Jun 2011 11:50:32 +0100 From: Mark Brown <broonie@...nsource.wolfsonmicro.com> To: unlisted-recipients:; (no To-header on input) Cc: netdev@...r.kernel.org, Ben Dooks <ben-linux@...ff.org>, Mark Brown <broonie@...nsource.wolfsonmicro.com> Subject: [PATCH] net: DM9000: Add support for byte EEPROM access From: Ben Dooks <ben-linux@...ff.org> Given many versions of ethtool's reluctance to do anything other than byte accesses to the EEPROM interface, it is easier to update the driver to support byte accesses so that all the ethtool versions that have been observed in Debian can write the EEPROM. Signed-off-by: Ben Dooks <ben-linux@...ff.org> Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com> --- drivers/net/dm9000.c | 26 ++++++++++++++++++++------ 1 files changed, 20 insertions(+), 6 deletions(-) diff --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c index 863e9c4..8ef31dc 100644 --- a/drivers/net/dm9000.c +++ b/drivers/net/dm9000.c @@ -535,21 +535,35 @@ static int dm9000_set_eeprom(struct net_device *dev, board_info_t *dm = to_dm9000_board(dev); int offset = ee->offset; int len = ee->len; - int i; + int done; /* EEPROM access is aligned to two bytes */ - if ((len & 1) != 0 || (offset & 1) != 0) - return -EINVAL; - if (dm->flags & DM9000_PLATF_NO_EEPROM) return -ENOENT; if (ee->magic != DM_EEPROM_MAGIC) return -EINVAL; - for (i = 0; i < len; i += 2) - dm9000_write_eeprom(dm, (offset + i) / 2, data + i); + while (len > 0) { + if (len & 1 || offset & 1) { + int which = offset & 1; + u8 tmp[2]; + + dm9000_read_eeprom(dm, offset / 2, tmp); + tmp[which] = *data; + dm9000_write_eeprom(dm, offset / 2, tmp); + + done = 1; + } else { + dm9000_write_eeprom(dm, offset / 2, data); + done = 2; + } + + data += done; + offset += done; + len -= done; + } return 0; } -- 1.7.5.3 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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