From 77e1a3675ad9d97ca6b564c759b2aaa6437c6d8b Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Thu, 27 Nov 2014 18:26:00 +0000
Subject: [PATCH] kernel: backport patches for overriding PHY reset to 3.14
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 43409
---
.../070-net-phy-move-PHY-software-reset.patch | 71 ++++++++++++++++
.../071-net-phy-override-PHY-reset.patch | 81 +++++++++++++++++++
.../patches-3.14/701-phy_extension.patch | 2 +-
.../702-phy_add_aneg_done_function.patch | 2 +-
...detach-callback-to-struct-phy_driver.patch | 2 +-
...710-phy-add-mdio_register_board_info.patch | 2 +-
6 files changed, 156 insertions(+), 4 deletions(-)
create mode 100644 target/linux/generic/patches-3.14/070-net-phy-move-PHY-software-reset.patch
create mode 100644 target/linux/generic/patches-3.14/071-net-phy-override-PHY-reset.patch
diff --git a/target/linux/generic/patches-3.14/070-net-phy-move-PHY-software-reset.patch b/target/linux/generic/patches-3.14/070-net-phy-move-PHY-software-reset.patch
new file mode 100644
index 0000000000..007a7aad3d
--- /dev/null
+++ b/target/linux/generic/patches-3.14/070-net-phy-move-PHY-software-reset.patch
@@ -0,0 +1,71 @@
+commit 797ac07137d9ae8572008e21e6123a9ae17dae50
+Author: Florian Fainelli <f.fainelli@gmail.com>
+Date: Mon Feb 17 13:34:02 2014 -0800
+
+ net: phy: move PHY software reset to genphy_soft_reset
+
+ As pointed out by Shaohui, this function is generic for 10/100/1000
+ PHYs, but 10G PHYs might have a slightly different reset sequence which
+ prevents most of them from using this function.
+
+ Move the BMCR_RESET based software resent sequence to
+ genphy_soft_reset() in preparation for allowing PHY drivers to implement
+ a soft_reset() callback.
+
+ Reported-by: Shaohui Xie <Shaohui.Xie@freescale.com>
+ Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
+ Signed-off-by: David S. Miller <davem@davemloft.net>
+
+--- a/drivers/net/phy/phy_device.c
++++ b/drivers/net/phy/phy_device.c
+@@ -539,11 +539,7 @@ int phy_init_hw(struct phy_device *phyde
+ if (!phydev->drv || !phydev->drv->config_init)
+ return 0;
+
+- ret = phy_write(phydev, MII_BMCR, BMCR_RESET);
+- if (ret < 0)
+- return ret;
+-
+- ret = phy_poll_reset(phydev);
++ ret = genphy_soft_reset(phydev);
+ if (ret < 0)
+ return ret;
+
+@@ -1029,6 +1025,27 @@ static int gen10g_read_status(struct phy
+ return 0;
+ }
+
++/**
++ * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
++ * @phydev: target phy_device struct
++ *
++ * Description: Perform a software PHY reset using the standard
++ * BMCR_RESET bit and poll for the reset bit to be cleared.
++ *
++ * Returns: 0 on success, < 0 on failure
++ */
++int genphy_soft_reset(struct phy_device *phydev)
++{
++ int ret;
++
++ ret = phy_write(phydev, MII_BMCR, BMCR_RESET);
++ if (ret < 0)
++ return ret;
++
++ return phy_poll_reset(phydev);
++}
++EXPORT_SYMBOL(genphy_soft_reset);
++
+ static int genphy_config_init(struct phy_device *phydev)
+ {
+ int val;
+--- a/include/linux/phy.h
++++ b/include/linux/phy.h
+@@ -616,6 +616,7 @@ int genphy_update_link(struct phy_device
+ int genphy_read_status(struct phy_device *phydev);
+ int genphy_suspend(struct phy_device *phydev);
+ int genphy_resume(struct phy_device *phydev);
++int genphy_soft_reset(struct phy_device *phydev);
+ void phy_driver_unregister(struct phy_driver *drv);
+ void phy_drivers_unregister(struct phy_driver *drv, int n);
+ int phy_driver_register(struct phy_driver *new_driver);
diff --git a/target/linux/generic/patches-3.14/071-net-phy-override-PHY-reset.patch b/target/linux/generic/patches-3.14/071-net-phy-override-PHY-reset.patch
new file mode 100644
index 0000000000..c70d40a677
--- /dev/null
+++ b/target/linux/generic/patches-3.14/071-net-phy-override-PHY-reset.patch
@@ -0,0 +1,81 @@
+commit 9df81dd7583d14862d0cfb673a941b261f3b2112
+Author: Florian Fainelli <f.fainelli@gmail.com>
+Date: Mon Feb 17 13:34:03 2014 -0800
+
+ net: phy: allow PHY drivers to implement their own software reset
+
+ As pointed out by Shaohui, most 10G PHYs out there have a non-standard
+ compliant software reset sequence, eventually something much more
+ complex than just toggling the BMCR_RESET bit. Allow PHY driver to
+ implement their own soft_reset() callback to deal with that. If no
+ callback is provided, call into genphy_soft_reset() which makes sure the
+ existing behavior is kept intact.
+
+ Reported-by: Shaohui Xie <Shaohui.Xie@freescale.com>
+ Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
+ Signed-off-by: David S. Miller <davem@davemloft.net>
+
+--- a/drivers/net/phy/phy_device.c
++++ b/drivers/net/phy/phy_device.c
+@@ -534,12 +534,16 @@ static int phy_poll_reset(struct phy_dev
+
+ int phy_init_hw(struct phy_device *phydev)
+ {
+- int ret;
++ int ret = 0;
+
+ if (!phydev->drv || !phydev->drv->config_init)
+ return 0;
+
+- ret = genphy_soft_reset(phydev);
++ if (phydev->drv->soft_reset)
++ ret = phydev->drv->soft_reset(phydev);
++ else
++ ret = genphy_soft_reset(phydev);
++
+ if (ret < 0)
+ return ret;
+
+@@ -1092,6 +1096,12 @@ static int genphy_config_init(struct phy
+ return 0;
+ }
+
++static int gen10g_soft_reset(struct phy_device *phydev)
++{
++ /* Do nothing for now */
++ return 0;
++}
++
+ static int gen10g_config_init(struct phy_device *phydev)
+ {
+ /* Temporarily just say we support everything */
+@@ -1266,6 +1276,7 @@ static struct phy_driver genphy_driver[]
+ .phy_id = 0xffffffff,
+ .phy_id_mask = 0xffffffff,
+ .name = "Generic PHY",
++ .soft_reset = genphy_soft_reset,
+ .config_init = genphy_config_init,
+ .features = 0,
+ .config_aneg = genphy_config_aneg,
+@@ -1277,6 +1288,7 @@ static struct phy_driver genphy_driver[]
+ .phy_id = 0xffffffff,
+ .phy_id_mask = 0xffffffff,
+ .name = "Generic 10G PHY",
++ .soft_reset = gen10g_soft_reset,
+ .config_init = gen10g_config_init,
+ .features = 0,
+ .config_aneg = gen10g_config_aneg,
+--- a/include/linux/phy.h
++++ b/include/linux/phy.h
+@@ -394,6 +394,11 @@ struct phy_driver {
+ u32 flags;
+
+ /*
++ * Called to issue a PHY software reset
++ */
++ int (*soft_reset)(struct phy_device *phydev);
++
++ /*
+ * Called to initialize the PHY,
+ * including after a reset
+ */
diff --git a/target/linux/generic/patches-3.14/701-phy_extension.patch b/target/linux/generic/patches-3.14/701-phy_extension.patch
index 4c1841155f..eda088fe20 100644
--- a/target/linux/generic/patches-3.14/701-phy_extension.patch
+++ b/target/linux/generic/patches-3.14/701-phy_extension.patch
@@ -53,7 +53,7 @@
* @phydev: the phy_device struct
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
-@@ -627,6 +627,7 @@ void phy_start_machine(struct phy_device
+@@ -633,6 +633,7 @@ void phy_start_machine(struct phy_device
void phy_stop_machine(struct phy_device *phydev);
int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd);
int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd);
diff --git a/target/linux/generic/patches-3.14/702-phy_add_aneg_done_function.patch b/target/linux/generic/patches-3.14/702-phy_add_aneg_done_function.patch
index d634647ddb..b617fc2575 100644
--- a/target/linux/generic/patches-3.14/702-phy_add_aneg_done_function.patch
+++ b/target/linux/generic/patches-3.14/702-phy_add_aneg_done_function.patch
@@ -1,6 +1,6 @@
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
-@@ -417,9 +417,18 @@ struct phy_driver {
+@@ -422,9 +422,18 @@ struct phy_driver {
*/
int (*config_aneg)(struct phy_device *phydev);
diff --git a/target/linux/generic/patches-3.14/703-phy-add-detach-callback-to-struct-phy_driver.patch b/target/linux/generic/patches-3.14/703-phy-add-detach-callback-to-struct-phy_driver.patch
index f4750bd56e..fee6b8c6c0 100644
--- a/target/linux/generic/patches-3.14/703-phy-add-detach-callback-to-struct-phy_driver.patch
+++ b/target/linux/generic/patches-3.14/703-phy-add-detach-callback-to-struct-phy_driver.patch
@@ -12,7 +12,7 @@
phy_suspend(phydev);
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
-@@ -441,6 +441,12 @@ struct phy_driver {
+@@ -446,6 +446,12 @@ struct phy_driver {
*/
int (*did_interrupt)(struct phy_device *phydev);
diff --git a/target/linux/generic/patches-3.14/710-phy-add-mdio_register_board_info.patch b/target/linux/generic/patches-3.14/710-phy-add-mdio_register_board_info.patch
index 91ae12630a..757616fa32 100644
--- a/target/linux/generic/patches-3.14/710-phy-add-mdio_register_board_info.patch
+++ b/target/linux/generic/patches-3.14/710-phy-add-mdio_register_board_info.patch
@@ -45,7 +45,7 @@
phy_device_free(phydev);
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
-@@ -667,4 +667,22 @@ int __init mdio_bus_init(void);
+@@ -673,4 +673,22 @@ int __init mdio_bus_init(void);
void mdio_bus_exit(void);
extern struct bus_type mdio_bus_type;
--
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