From 160d0fadaf7ce20e5bad26c8a955504b93c6a5ba Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Mon, 19 Oct 2009 23:49:04 +0000 Subject: KS8851: Fix MAC address write order The MAC address register was being written in the wrong order, so add a new address macro to convert mac-address byte to register address and a ks8851_wrreg8() function to write each byte without having to worry about any difficult byte swapping. Fixes a bug reported by Doong, Ping of Micrel. Signed-off-by: Ben Dooks Signed-off-by: David S. Miller --- drivers/net/ks8851.c | 37 +++++++++++++++++++++++++++++++++---- 1 file changed, 33 insertions(+), 4 deletions(-) (limited to 'drivers/net/ks8851.c') diff --git a/drivers/net/ks8851.c b/drivers/net/ks8851.c index 18b17a1deb1..29fa19a076b 100644 --- a/drivers/net/ks8851.c +++ b/drivers/net/ks8851.c @@ -170,6 +170,36 @@ static void ks8851_wrreg16(struct ks8851_net *ks, unsigned reg, unsigned val) ks_err(ks, "spi_sync() failed\n"); } +/** + * ks8851_wrreg8 - write 8bit register value to chip + * @ks: The chip state + * @reg: The register address + * @val: The value to write + * + * Issue a write to put the value @val into the register specified in @reg. + */ +static void ks8851_wrreg8(struct ks8851_net *ks, unsigned reg, unsigned val) +{ + struct spi_transfer *xfer = &ks->spi_xfer1; + struct spi_message *msg = &ks->spi_msg1; + __le16 txb[2]; + int ret; + int bit; + + bit = 1 << (reg & 3); + + txb[0] = cpu_to_le16(MK_OP(bit, reg) | KS_SPIOP_WR); + txb[1] = val; + + xfer->tx_buf = txb; + xfer->rx_buf = NULL; + xfer->len = 3; + + ret = spi_sync(ks->spidev, msg); + if (ret < 0) + ks_err(ks, "spi_sync() failed\n"); +} + /** * ks8851_rx_1msg - select whether to use one or two messages for spi read * @ks: The device structure @@ -322,13 +352,12 @@ static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op) static int ks8851_write_mac_addr(struct net_device *dev) { struct ks8851_net *ks = netdev_priv(dev); - u16 *mcp = (u16 *)dev->dev_addr; + int i; mutex_lock(&ks->lock); - ks8851_wrreg16(ks, KS_MARL, mcp[0]); - ks8851_wrreg16(ks, KS_MARM, mcp[1]); - ks8851_wrreg16(ks, KS_MARH, mcp[2]); + for (i = 0; i < ETH_ALEN; i++) + ks8851_wrreg8(ks, KS_MAR(i), dev->dev_addr[i]); mutex_unlock(&ks->lock); -- cgit v1.2.3-18-g5258