From: Frank Li <Frank.Li@freescale.com>
To: b38611@freescale.com, davem@davemloft.net,
netdev@vger.kernel.org, lznuaa@gmail.com
Cc: shawn.guo@linaro.org, linux-arm-kernel@lists.infradead.org,
devicetree@vger.kernel.org, Fugang Duan <B38611@freescale.com>,
Frank Li <Frank.Li@freescale.com>
Subject: [Patch v2 net-next 06/12] net:fec: Disable enet-avb MAC instead of reset MAC
Date: Wed, 10 Sep 2014 04:15:37 +0800 [thread overview]
Message-ID: <1410293743-27874-7-git-send-email-Frank.Li@freescale.com> (raw)
In-Reply-To: <1410293743-27874-1-git-send-email-Frank.Li@freescale.com>
From: Fugang Duan <B38611@freescale.com>
For i.MX6SX enet use AXI bus, reset MAC will make system bus dead
if ENET-AXI bus has pending access (AHB bus should not have such issue).
So, disable enet with AVB MAC instead of reset MAC itself.
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Frank Li <Frank.Li@freescale.com>
---
drivers/net/ethernet/freescale/fec_main.c | 26 ++++++++++++++++++++------
1 file changed, 20 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 03972f7..5f8e997 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -945,9 +945,16 @@ fec_restart(struct net_device *ndev)
u32 rcntl = OPT_FRAME_SIZE | 0x04;
u32 ecntl = 0x2; /* ETHEREN */
- /* Whack a reset. We should wait for this. */
- writel(1, fep->hwp + FEC_ECNTRL);
- udelay(10);
+ /* Whack a reset. We should wait for this.
+ * For i.MX6SX SOC, enet use AXI bus, we use disable MAC
+ * instead of reset MAC itself.
+ */
+ if (id_entry && id_entry->driver_data & FEC_QUIRK_HAS_AVB) {
+ writel(0, fep->hwp + FEC_ECNTRL);
+ } else {
+ writel(1, fep->hwp + FEC_ECNTRL);
+ udelay(10);
+ }
/*
* enet-mac reset will reset mac address registers too,
@@ -1118,9 +1125,16 @@ fec_stop(struct net_device *ndev)
netdev_err(ndev, "Graceful transmit stop did not complete!\n");
}
- /* Whack a reset. We should wait for this. */
- writel(1, fep->hwp + FEC_ECNTRL);
- udelay(10);
+ /* Whack a reset. We should wait for this.
+ * For i.MX6SX SOC, enet use AXI bus, we use disable MAC
+ * instead of reset MAC itself.
+ */
+ if (id_entry && id_entry->driver_data & FEC_QUIRK_HAS_AVB) {
+ writel(0, fep->hwp + FEC_ECNTRL);
+ } else {
+ writel(1, fep->hwp + FEC_ECNTRL);
+ udelay(10);
+ }
writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
--
1.9.1
next prev parent reply other threads:[~2014-09-09 20:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-09 20:15 [Patch v2 net-next 00/12] net: fec: imx6sx multiqueue support Frank Li
2014-09-09 20:15 ` [Patch v2 net-next 01/12] net:fec: add enet refrence clock for i.MX 6SX chip Frank Li
2014-09-09 20:15 ` [Patch v2 net-next 02/12] net:fec: add enet AVB feature macro define for imx6sx Frank Li
2014-09-09 20:15 ` [Patch v2 net-next 03/12] net: fec: change data structure to support multiqueue Frank Li
2014-09-09 20:15 ` [Patch v2 net-next 04/12] net: fec: parser max queue number from dt file Frank Li
2014-09-09 20:15 ` [Patch v2 net-next 05/12] net: fec: init multi queue date structure Frank Li
2014-09-09 20:15 ` Frank Li [this message]
2014-09-09 20:15 ` [Patch v2 net-next 07/12] net: fec: add enet-avb IP support Frank Li
2014-09-09 20:15 ` [Patch v2 net-next 08/12] net:fec: Add fsl,imx6sx-fec compatible strings Frank Li
2014-09-09 20:15 ` [Patch v2 net-next 09/12] net: fec: change FEC alignment according to i.mx6 sx requirement Frank Li
2014-09-10 12:51 ` Fabio Estevam
[not found] ` <CAOMZO5AwOWr8uWCvt3XzM8CJideu+1LBY6QUQ772QjLjCYxL1w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-09-10 13:22 ` Zhi Li
[not found] ` <CAHrpEqSf8j7NUZDAORYwN4cbd2MBA9bcKa9mzNGg4JJiKsJKvA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-09-10 13:27 ` Fabio Estevam
[not found] ` <1410293743-27874-1-git-send-email-Frank.Li-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
2014-09-09 20:15 ` [Patch v2 net-next 10/12] net: fec: init complete variable in early to avoid kernel dump Frank Li
2014-09-09 20:15 ` [Patch v2 net-next 11/12] ARM: Documentation: Update fec dts binding doc Frank Li
2014-09-09 20:15 ` [Patch v2 net-next 12/12] ARM: dts: imx6sx: add multi-queue support enet Frank Li
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