973c5d4a1d
Changelog: https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.127 All patches automatically rebased. Build system: x86_64 Build-tested: ramips/tplink_archer-a6-v3 Run-tested: ramips/tplink_archer-a6-v3 Signed-off-by: John Audia <therealgraysky@proton.me>
132 lines
4.1 KiB
Diff
132 lines
4.1 KiB
Diff
From ba3c01ee02ed0d821c9f241f179bbc9457542b8f Mon Sep 17 00:00:00 2001
|
|
From: Ansuel Smith <ansuelsmth@gmail.com>
|
|
Date: Sun, 10 Oct 2021 00:46:15 +0200
|
|
Subject: net: phy: at803x: fix resume for QCA8327 phy
|
|
|
|
From Documentation phy resume triggers phy reset and restart
|
|
auto-negotiation. Add a dedicated function to wait reset to finish as
|
|
it was notice a regression where port sometime are not reliable after a
|
|
suspend/resume session. The reset wait logic is copied from phy_poll_reset.
|
|
Add dedicated suspend function to use genphy_suspend only with QCA8337
|
|
phy and set only additional debug settings for QCA8327. With more test
|
|
it was reported that QCA8327 doesn't proprely support this mode and
|
|
using this cause the unreliability of the switch ports, especially the
|
|
malfunction of the port0.
|
|
|
|
Fixes: 15b9df4ece17 ("net: phy: at803x: add resume/suspend function to qca83xx phy")
|
|
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
---
|
|
drivers/net/phy/at803x.c | 69 +++++++++++++++++++++++++++++++++++++++++++-----
|
|
1 file changed, 63 insertions(+), 6 deletions(-)
|
|
|
|
--- a/drivers/net/phy/at803x.c
|
|
+++ b/drivers/net/phy/at803x.c
|
|
@@ -92,9 +92,14 @@
|
|
#define AT803X_DEBUG_REG_5 0x05
|
|
#define AT803X_DEBUG_TX_CLK_DLY_EN BIT(8)
|
|
|
|
+#define AT803X_DEBUG_REG_HIB_CTRL 0x0b
|
|
+#define AT803X_DEBUG_HIB_CTRL_SEL_RST_80U BIT(10)
|
|
+#define AT803X_DEBUG_HIB_CTRL_EN_ANY_CHANGE BIT(13)
|
|
+
|
|
#define AT803X_DEBUG_REG_3C 0x3C
|
|
|
|
#define AT803X_DEBUG_REG_3D 0x3D
|
|
+#define AT803X_DEBUG_GATE_CLK_IN1000 BIT(6)
|
|
|
|
#define AT803X_DEBUG_REG_1F 0x1F
|
|
#define AT803X_DEBUG_PLL_ON BIT(2)
|
|
@@ -1304,6 +1309,58 @@ static int qca83xx_config_init(struct ph
|
|
return 0;
|
|
}
|
|
|
|
+static int qca83xx_resume(struct phy_device *phydev)
|
|
+{
|
|
+ int ret, val;
|
|
+
|
|
+ /* Skip reset if not suspended */
|
|
+ if (!phydev->suspended)
|
|
+ return 0;
|
|
+
|
|
+ /* Reinit the port, reset values set by suspend */
|
|
+ qca83xx_config_init(phydev);
|
|
+
|
|
+ /* Reset the port on port resume */
|
|
+ phy_set_bits(phydev, MII_BMCR, BMCR_RESET | BMCR_ANENABLE);
|
|
+
|
|
+ /* On resume from suspend the switch execute a reset and
|
|
+ * restart auto-negotiation. Wait for reset to complete.
|
|
+ */
|
|
+ ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET),
|
|
+ 50000, 600000, true);
|
|
+ if (ret)
|
|
+ return ret;
|
|
+
|
|
+ msleep(1);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int qca83xx_suspend(struct phy_device *phydev)
|
|
+{
|
|
+ u16 mask = 0;
|
|
+
|
|
+ /* Only QCA8337 support actual suspend.
|
|
+ * QCA8327 cause port unreliability when phy suspend
|
|
+ * is set.
|
|
+ */
|
|
+ if (phydev->drv->phy_id == QCA8337_PHY_ID) {
|
|
+ genphy_suspend(phydev);
|
|
+ } else {
|
|
+ mask |= ~(BMCR_SPEED1000 | BMCR_FULLDPLX);
|
|
+ phy_modify(phydev, MII_BMCR, mask, 0);
|
|
+ }
|
|
+
|
|
+ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_3D,
|
|
+ AT803X_DEBUG_GATE_CLK_IN1000, 0);
|
|
+
|
|
+ at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_HIB_CTRL,
|
|
+ AT803X_DEBUG_HIB_CTRL_EN_ANY_CHANGE |
|
|
+ AT803X_DEBUG_HIB_CTRL_SEL_RST_80U, 0);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
static struct phy_driver at803x_driver[] = {
|
|
{
|
|
/* Qualcomm Atheros AR8035 */
|
|
@@ -1411,8 +1468,8 @@ static struct phy_driver at803x_driver[]
|
|
.get_sset_count = at803x_get_sset_count,
|
|
.get_strings = at803x_get_strings,
|
|
.get_stats = at803x_get_stats,
|
|
- .suspend = genphy_suspend,
|
|
- .resume = genphy_resume,
|
|
+ .suspend = qca83xx_suspend,
|
|
+ .resume = qca83xx_resume,
|
|
}, {
|
|
/* QCA8327-A from switch QCA8327-AL1A */
|
|
.phy_id = QCA8327_A_PHY_ID,
|
|
@@ -1426,8 +1483,8 @@ static struct phy_driver at803x_driver[]
|
|
.get_sset_count = at803x_get_sset_count,
|
|
.get_strings = at803x_get_strings,
|
|
.get_stats = at803x_get_stats,
|
|
- .suspend = genphy_suspend,
|
|
- .resume = genphy_resume,
|
|
+ .suspend = qca83xx_suspend,
|
|
+ .resume = qca83xx_resume,
|
|
}, {
|
|
/* QCA8327-B from switch QCA8327-BL1A */
|
|
.phy_id = QCA8327_B_PHY_ID,
|
|
@@ -1441,8 +1498,8 @@ static struct phy_driver at803x_driver[]
|
|
.get_sset_count = at803x_get_sset_count,
|
|
.get_strings = at803x_get_strings,
|
|
.get_stats = at803x_get_stats,
|
|
- .suspend = genphy_suspend,
|
|
- .resume = genphy_resume,
|
|
+ .suspend = qca83xx_suspend,
|
|
+ .resume = qca83xx_resume,
|
|
}, };
|
|
|
|
module_phy_driver(at803x_driver);
|