From: Krzysztof Hałasa Date: Thu, 27 May 2010 10:40:17 +0000 (+0200) Subject: IXP4xx: Prevent HSS transmitter lockup by disabling FRaMe signals. X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=627634293ae7f4ec864cecd4282650ceae7a5067;p=linux-beck.git IXP4xx: Prevent HSS transmitter lockup by disabling FRaMe signals. With port configured with PCR_FRM_SYNC_OUTPUT* and external clock, bringing the hdlcX interface up and down without active clock supplied to the HSS causes a TX lockup. We don't support channelized/partial interfaces so FRaMe signals can't be used anyway, disabling them makes the lockup go away. Changes to this logic will be required if we want to support channelized HSS mode (this is most probably bug in NPE-A HSS firmware). Signed-off-by: Krzysztof Hałasa --- diff --git a/drivers/net/wan/ixp4xx_hss.c b/drivers/net/wan/ixp4xx_hss.c index 0c2cdde686a0..31b0b4d1f573 100644 --- a/drivers/net/wan/ixp4xx_hss.c +++ b/drivers/net/wan/ixp4xx_hss.c @@ -396,7 +396,7 @@ static void hss_config(struct port *port) msg.cmd = PORT_CONFIG_WRITE; msg.hss_port = port->id; msg.index = HSS_CONFIG_TX_PCR; - msg.data32 = PCR_FRM_SYNC_OUTPUT_RISING | PCR_MSB_ENDIAN | + msg.data32 = PCR_FRM_PULSE_DISABLED | PCR_MSB_ENDIAN | PCR_TX_DATA_ENABLE | PCR_SOF_NO_FBIT; if (port->clock_type == CLOCK_INT) msg.data32 |= PCR_SYNC_CLK_DIR_OUTPUT;