2016-11-29 14:29:19 +00:00
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From: Felix Fietkau <nbd@openwrt.org>
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Date: Sun, 27 Nov 2016 22:49:27 +0100
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Subject: kernel: add at803x fix for sgmii mode
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Some (possibly broken) bootloaders incorreclty initialize at8033
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phy. This patch enables sgmii autonegotiation mode.
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Signed-off-by: Roman Yeryomin <roman@advem.lv>
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Origin: backport, https://git.lede-project.org/?p=source.git;a=commit;h=e14d2aee0ab91c43d0bb14baf84cc9b997185870
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Bug-gluon: https://github.com/freifunk-gluon/gluon/issues/911
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diff --git a/target/linux/ar71xx/patches-3.18/735-net-phy-at803x-fix-at8033-sgmii-mode.patch b/target/linux/ar71xx/patches-3.18/735-net-phy-at803x-fix-at8033-sgmii-mode.patch
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new file mode 100644
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2016-12-20 00:09:53 +00:00
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index 0000000000000000000000000000000000000000..4a8f532aa36f729339e01ebadd6ea3cb292d7ac9
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2016-11-29 14:29:19 +00:00
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--- /dev/null
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+++ b/target/linux/ar71xx/patches-3.18/735-net-phy-at803x-fix-at8033-sgmii-mode.patch
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@@ -0,0 +1,96 @@
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+--- a/drivers/net/phy/at803x.c
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++++ b/drivers/net/phy/at803x.c
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+@@ -36,6 +36,9 @@
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+ #define AT803X_INER 0x0012
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+ #define AT803X_INER_INIT 0xec00
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+ #define AT803X_INSR 0x0013
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++#define AT803X_REG_CHIP_CONFIG 0x1f
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++#define AT803X_BT_BX_REG_SEL 0x8000
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++#define AT803X_SGMII_ANEG_EN 0x1000
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+
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+ #define AT803X_PCS_SMART_EEE_CTRL3 0x805D
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+ #define AT803X_SMART_EEE_CTRL3_LPI_TX_DELAY_SEL_MASK 0x3
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+@@ -49,9 +52,10 @@
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+ #define AT803X_DEBUG_SYSTEM_MODE_CTRL 0x05
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+ #define AT803X_DEBUG_RGMII_TX_CLK_DLY BIT(8)
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+
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+-#define ATH8030_PHY_ID 0x004dd076
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+-#define ATH8031_PHY_ID 0x004dd074
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+-#define ATH8035_PHY_ID 0x004dd072
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++#define AT803X_PHY_ID_MASK 0xffffffef
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++#define ATH8030_PHY_ID 0x004dd076
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++#define ATH8031_PHY_ID 0x004dd074
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++#define ATH8035_PHY_ID 0x004dd072
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+
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+ MODULE_DESCRIPTION("Atheros 803x PHY driver");
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+ MODULE_AUTHOR("Matus Ujhelyi");
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+@@ -267,6 +271,27 @@ static int at803x_config_init(struct phy
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+ {
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+ struct at803x_platform_data *pdata;
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+ int ret;
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++ u32 v;
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++
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++ if (phydev->drv->phy_id == ATH8031_PHY_ID &&
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++ phydev->interface == PHY_INTERFACE_MODE_SGMII)
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++ {
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++ v = phy_read(phydev, AT803X_REG_CHIP_CONFIG);
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++ /* select SGMII/fiber page */
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++ ret = phy_write(phydev, AT803X_REG_CHIP_CONFIG,
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++ v & ~AT803X_BT_BX_REG_SEL);
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++ if (ret)
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++ return ret;
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++ /* enable SGMII autonegotiation */
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++ ret = phy_write(phydev, MII_BMCR, AT803X_SGMII_ANEG_EN);
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++ if (ret)
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++ return ret;
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++ /* select copper page */
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++ ret = phy_write(phydev, AT803X_REG_CHIP_CONFIG,
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++ v | AT803X_BT_BX_REG_SEL);
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++ if (ret)
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++ return ret;
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++ }
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+
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+ ret = genphy_config_init(phydev);
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+ if (ret < 0)
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+@@ -393,7 +418,7 @@ static struct phy_driver at803x_driver[]
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+ /* ATHEROS 8035 */
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+ .phy_id = ATH8035_PHY_ID,
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+ .name = "Atheros 8035 ethernet",
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+- .phy_id_mask = 0xffffffef,
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++ .phy_id_mask = AT803X_PHY_ID_MASK,
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+ .probe = at803x_probe,
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+ .config_init = at803x_config_init,
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+ .link_change_notify = at803x_link_change_notify,
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+@@ -412,7 +437,7 @@ static struct phy_driver at803x_driver[]
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+ /* ATHEROS 8030 */
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+ .phy_id = ATH8030_PHY_ID,
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+ .name = "Atheros 8030 ethernet",
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+- .phy_id_mask = 0xffffffef,
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++ .phy_id_mask = AT803X_PHY_ID_MASK,
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+ .probe = at803x_probe,
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+ .config_init = at803x_config_init,
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+ .link_change_notify = at803x_link_change_notify,
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+@@ -430,8 +455,8 @@ static struct phy_driver at803x_driver[]
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+ }, {
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+ /* ATHEROS 8031 */
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+ .phy_id = ATH8031_PHY_ID,
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+- .name = "Atheros 8031 ethernet",
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+- .phy_id_mask = 0xffffffef,
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++ .name = "Atheros 8031/8033 ethernet",
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++ .phy_id_mask = AT803X_PHY_ID_MASK,
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+ .probe = at803x_probe,
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+ .config_init = at803x_config_init,
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+ .link_change_notify = at803x_link_change_notify,
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+@@ -465,9 +490,9 @@ module_init(atheros_init);
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+ module_exit(atheros_exit);
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+
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+ static struct mdio_device_id __maybe_unused atheros_tbl[] = {
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+- { ATH8030_PHY_ID, 0xffffffef },
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+- { ATH8031_PHY_ID, 0xffffffef },
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+- { ATH8035_PHY_ID, 0xffffffef },
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++ { ATH8030_PHY_ID, AT803X_PHY_ID_MASK },
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++ { ATH8031_PHY_ID, AT803X_PHY_ID_MASK },
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++ { ATH8035_PHY_ID, AT803X_PHY_ID_MASK },
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+ { }
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+ };
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+
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