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Date: Mon, 18 Oct 2021 11:33:31 +0800 From: Luo Jie <luoj@...eaurora.org> To: andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk, davem@...emloft.net, kuba@...nel.org Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, sricharan@...eaurora.org, Luo Jie <luoj@...eaurora.org> Subject: [PATCH v3 11/13] net: phy: add qca8081 soft_reset and enable master/slave seed qca8081 phy is a single port phy, configure phy the lower seed value to make it linked as slave mode easier. Signed-off-by: Luo Jie <luoj@...eaurora.org> --- drivers/net/phy/at803x.c | 47 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c index 8ab2084b9614..5d007f89e9d3 100644 --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -214,6 +214,12 @@ #define QCA808X_PHY_MMD3_DEBUG_6 0xa011 #define QCA808X_MMD3_DEBUG_6_VALUE 0x5f85 +/* master/slave seed config */ +#define QCA808X_PHY_DEBUG_LOCAL_SEED 9 +#define QCA808X_MASTER_SLAVE_SEED_ENABLE BIT(1) +#define QCA808X_MASTER_SLAVE_SEED_CFG GENMASK(12, 2) +#define QCA808X_MASTER_SLAVE_SEED_RANGE 0x32 + MODULE_DESCRIPTION("Qualcomm Atheros AR803x and QCA808X PHY driver"); MODULE_AUTHOR("Matus Ujhelyi"); MODULE_LICENSE("GPL"); @@ -1471,6 +1477,25 @@ static int qca808x_phy_fast_retrain_config(struct phy_device *phydev) return 0; } +static int qca808x_phy_ms_random_seed_set(struct phy_device *phydev) +{ + u16 seed_value = (prandom_u32() % QCA808X_MASTER_SLAVE_SEED_RANGE) << 2; + + return at803x_debug_reg_mask(phydev, QCA808X_PHY_DEBUG_LOCAL_SEED, + QCA808X_MASTER_SLAVE_SEED_CFG, seed_value); +} + +static int qca808x_phy_ms_seed_enable(struct phy_device *phydev, bool enable) +{ + u16 seed_enable = 0; + + if (enable) + seed_enable = QCA808X_MASTER_SLAVE_SEED_ENABLE; + + return at803x_debug_reg_mask(phydev, QCA808X_PHY_DEBUG_LOCAL_SEED, + QCA808X_MASTER_SLAVE_SEED_ENABLE, seed_enable); +} + static int qca808x_config_init(struct phy_device *phydev) { int ret; @@ -1492,6 +1517,16 @@ static int qca808x_config_init(struct phy_device *phydev) if (ret) return ret; + /* Configure lower ramdom seed to make phy linked as slave mode */ + ret = qca808x_phy_ms_random_seed_set(phydev); + if (ret) + return ret; + + /* Enable seed */ + ret = qca808x_phy_ms_seed_enable(phydev, true); + if (ret) + return ret; + /* Configure adc threshold as 100mv for the link 10M */ return at803x_debug_reg_mask(phydev, QCA808X_PHY_DEBUG_ADC_THRESHOLD, QCA808X_ADC_THRESHOLD_MASK, QCA808X_ADC_THRESHOLD_100MV); @@ -1524,6 +1559,17 @@ static int qca808x_read_status(struct phy_device *phydev) return 0; } +static int qca808x_soft_reset(struct phy_device *phydev) +{ + int ret; + + ret = genphy_soft_reset(phydev); + if (ret < 0) + return ret; + + return qca808x_phy_ms_seed_enable(phydev, true); +} + static struct phy_driver at803x_driver[] = { { /* Qualcomm Atheros AR8035 */ @@ -1649,6 +1695,7 @@ static struct phy_driver at803x_driver[] = { .resume = genphy_resume, .read_status = qca808x_read_status, .config_init = qca808x_config_init, + .soft_reset = qca808x_soft_reset, }, }; module_phy_driver(at803x_driver); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
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