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Message-Id: <20220902023001.2258165-1-wei.fang@nxp.com>
Date: Fri, 2 Sep 2022 10:30:01 +0800
From: wei.fang@....com
To: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
pabeni@...hat.com
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH V2 net-next] net: fec: add stop mode support for imx8 platform
From: Wei Fang <wei.fang@....com>
The current driver support stop mode by calling machine api.
The patch add dts support to set GPR register for stop request.
imx8mq enter stop/exit stop mode by setting GPR bit, which can
be accessed by A core.
imx8qm enter stop/exit stop mode by calling IMX_SC ipc APIs that
communicate with M core ipc service, and the M core set the related
GPR bit at last.
Signed-off-by: Wei Fang <wei.fang@....com>
---
V2 change:
V1 patch does not apply, so rebase it.
---
drivers/net/ethernet/freescale/fec.h | 4 +++
drivers/net/ethernet/freescale/fec_main.c | 35 +++++++++++++++++++++++
2 files changed, 39 insertions(+)
diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index 0cebe4b63adb..68bc16058bae 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -18,6 +18,8 @@
#include <linux/net_tstamp.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/timecounter.h>
+#include <dt-bindings/firmware/imx/rsrc.h>
+#include <linux/firmware/imx/sci.h>
#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM) || \
@@ -641,6 +643,8 @@ struct fec_enet_private {
u8 at_inc_corr;
} ptp_saved_state;
+ struct imx_sc_ipc *ipc_handle;
+
u64 ethtool_stats[];
};
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 7211597d323d..8ba8eb340b92 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1181,6 +1181,34 @@ fec_restart(struct net_device *ndev)
}
+static int fec_enet_ipc_handle_init(struct fec_enet_private *fep)
+{
+ if (!(of_machine_is_compatible("fsl,imx8qm") ||
+ of_machine_is_compatible("fsl,imx8qxp") ||
+ of_machine_is_compatible("fsl,imx8dxl")))
+ return 0;
+
+ return imx_scu_get_handle(&fep->ipc_handle);
+}
+
+static void fec_enet_ipg_stop_set(struct fec_enet_private *fep, bool enabled)
+{
+ struct device_node *np = fep->pdev->dev.of_node;
+ u32 rsrc_id, val;
+ int idx;
+
+ if (!np || !fep->ipc_handle)
+ return;
+
+ idx = of_alias_get_id(np, "ethernet");
+ if (idx < 0)
+ idx = 0;
+ rsrc_id = idx ? IMX_SC_R_ENET_1 : IMX_SC_R_ENET_0;
+
+ val = enabled ? 1 : 0;
+ imx_sc_misc_set_control(fep->ipc_handle, rsrc_id, IMX_SC_C_IPG_STOP, val);
+}
+
static void fec_enet_stop_mode(struct fec_enet_private *fep, bool enabled)
{
struct fec_platform_data *pdata = fep->pdev->dev.platform_data;
@@ -1196,6 +1224,8 @@ static void fec_enet_stop_mode(struct fec_enet_private *fep, bool enabled)
BIT(stop_gpr->bit), 0);
} else if (pdata && pdata->sleep_mode_enable) {
pdata->sleep_mode_enable(enabled);
+ } else {
+ fec_enet_ipg_stop_set(fep, enabled);
}
}
@@ -3851,6 +3881,10 @@ fec_probe(struct platform_device *pdev)
!of_property_read_bool(np, "fsl,err006687-workaround-present"))
fep->quirks |= FEC_QUIRK_ERR006687;
+ ret = fec_enet_ipc_handle_init(fep);
+ if (ret)
+ goto failed_ipc_init;
+
if (of_get_property(np, "fsl,magic-packet", NULL))
fep->wol_flag |= FEC_WOL_HAS_MAGIC_PACKET;
@@ -4048,6 +4082,7 @@ fec_probe(struct platform_device *pdev)
of_phy_deregister_fixed_link(np);
of_node_put(phy_node);
failed_stop_mode:
+failed_ipc_init:
failed_phy:
dev_id--;
failed_ioremap:
--
2.25.1
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