| Message ID | 20210502230710.30676-10-ansuelsmth@gmail.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [RFC,net-next,v2,01/17] net: mdio: ipq8064: clean whitespaces in define | expand |
On Mon, May 03, 2021 at 01:07:02AM +0200, Ansuel Smith wrote: > The legacy qsdk code used a different delay instead of the max value. > Qsdk use 1 ps for rx and 2 ps for tx. Make these values configurable > using the standard rx/tx-internal-delay-ps ethernet binding and apply > qsdk values by default. The connected gmac doesn't add any delay so no > additional delay is added to tx/rx. > > Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> > --- > drivers/net/dsa/qca8k.c | 51 +++++++++++++++++++++++++++++++++++++++-- > drivers/net/dsa/qca8k.h | 11 +++++---- > 2 files changed, 55 insertions(+), 7 deletions(-) > > diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c > index 5478bee39c6e..d522398d504e 100644 > --- a/drivers/net/dsa/qca8k.c > +++ b/drivers/net/dsa/qca8k.c > @@ -763,6 +763,47 @@ qca8k_setup_mdio_bus(struct qca8k_priv *priv) > return 0; > } > > +static int > +qca8k_setup_of_rgmii_delay(struct qca8k_priv *priv) > +{ > + struct device_node *ports, *port; > + u32 val; > + > + ports = of_get_child_by_name(priv->dev->of_node, "ports"); > + if (!ports) > + return -EINVAL; > + > + /* Assume only one port with rgmii-id mode */ > + for_each_available_child_of_node(ports, port) { > + if (!of_property_match_string(port, "phy-mode", "rgmii-id")) > + continue; > + > + if (of_property_read_u32(port, "rx-internal-delay-ps", &val)) > + val = 2; > + > + if (val > QCA8K_MAX_DELAY) { > + dev_err(priv->dev, "rgmii rx delay is limited to more than 3ps, setting to the max value"); > + priv->rgmii_rx_delay = 3; > + } else { > + priv->rgmii_rx_delay = val; > + } > + > + if (of_property_read_u32(port, "rx-internal-delay-ps", &val)) > + val = 1; > + Sorry some mistake here. Will be fixed in v3 for sure. > + if (val > QCA8K_MAX_DELAY) { > + dev_err(priv->dev, "rgmii tx delay is limited to more than 3ps, setting to the max value"); > + priv->rgmii_tx_delay = 3; > + } else { > + priv->rgmii_rx_delay = val; And here. > + } > + } > + > + of_node_put(ports); > + > + return 0; > +} > + > static int > qca8k_setup(struct dsa_switch *ds) > { > @@ -792,6 +833,10 @@ qca8k_setup(struct dsa_switch *ds) > if (ret) > return ret; > > + ret = qca8k_setup_of_rgmii_delay(priv); > + if (ret) > + return ret; > + > /* Enable CPU Port */ > ret = qca8k_reg_set(priv, QCA8K_REG_GLOBAL_FW_CTRL0, > QCA8K_GLOBAL_FW_CTRL0_CPU_PORT_EN); > @@ -1003,8 +1048,10 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode, > */ > qca8k_write(priv, reg, > QCA8K_PORT_PAD_RGMII_EN | > - QCA8K_PORT_PAD_RGMII_TX_DELAY(QCA8K_MAX_DELAY) | > - QCA8K_PORT_PAD_RGMII_RX_DELAY(QCA8K_MAX_DELAY)); > + QCA8K_PORT_PAD_RGMII_TX_DELAY(priv->rgmii_tx_delay) | > + QCA8K_PORT_PAD_RGMII_RX_DELAY(priv->rgmii_rx_delay) | > + QCA8K_PORT_PAD_RGMII_TX_DELAY_EN | > + QCA8K_PORT_PAD_RGMII_RX_DELAY_EN); > /* QCA8337 requires to set rgmii rx delay */ > if (data->id == QCA8K_ID_QCA8337) > qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL, > diff --git a/drivers/net/dsa/qca8k.h b/drivers/net/dsa/qca8k.h > index 0b503f78bf92..80830bb42736 100644 > --- a/drivers/net/dsa/qca8k.h > +++ b/drivers/net/dsa/qca8k.h > @@ -36,12 +36,11 @@ > #define QCA8K_REG_PORT5_PAD_CTRL 0x008 > #define QCA8K_REG_PORT6_PAD_CTRL 0x00c > #define QCA8K_PORT_PAD_RGMII_EN BIT(26) > -#define QCA8K_PORT_PAD_RGMII_TX_DELAY(x) \ > - ((0x8 + (x & 0x3)) << 22) > -#define QCA8K_PORT_PAD_RGMII_RX_DELAY(x) \ > - ((0x10 + (x & 0x3)) << 20) > -#define QCA8K_MAX_DELAY 3 > +#define QCA8K_PORT_PAD_RGMII_TX_DELAY(x) ((x) << 22) > +#define QCA8K_PORT_PAD_RGMII_RX_DELAY(x) ((x) << 20) > +#define QCA8K_PORT_PAD_RGMII_TX_DELAY_EN BIT(25) > #define QCA8K_PORT_PAD_RGMII_RX_DELAY_EN BIT(24) > +#define QCA8K_MAX_DELAY 3 > #define QCA8K_PORT_PAD_SGMII_EN BIT(7) > #define QCA8K_REG_PWS 0x010 > #define QCA8K_PWS_SERDES_AEN_DIS BIT(7) > @@ -251,6 +250,8 @@ struct qca8k_match_data { > > struct qca8k_priv { > u8 switch_revision; > + u8 rgmii_tx_delay; > + u8 rgmii_rx_delay; > struct regmap *regmap; > struct mii_bus *bus; > struct ar8xxx_port_status port_sts[QCA8K_NUM_PORTS]; > -- > 2.30.2 >
diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c index 5478bee39c6e..d522398d504e 100644 --- a/drivers/net/dsa/qca8k.c +++ b/drivers/net/dsa/qca8k.c @@ -763,6 +763,47 @@ qca8k_setup_mdio_bus(struct qca8k_priv *priv) return 0; } +static int +qca8k_setup_of_rgmii_delay(struct qca8k_priv *priv) +{ + struct device_node *ports, *port; + u32 val; + + ports = of_get_child_by_name(priv->dev->of_node, "ports"); + if (!ports) + return -EINVAL; + + /* Assume only one port with rgmii-id mode */ + for_each_available_child_of_node(ports, port) { + if (!of_property_match_string(port, "phy-mode", "rgmii-id")) + continue; + + if (of_property_read_u32(port, "rx-internal-delay-ps", &val)) + val = 2; + + if (val > QCA8K_MAX_DELAY) { + dev_err(priv->dev, "rgmii rx delay is limited to more than 3ps, setting to the max value"); + priv->rgmii_rx_delay = 3; + } else { + priv->rgmii_rx_delay = val; + } + + if (of_property_read_u32(port, "rx-internal-delay-ps", &val)) + val = 1; + + if (val > QCA8K_MAX_DELAY) { + dev_err(priv->dev, "rgmii tx delay is limited to more than 3ps, setting to the max value"); + priv->rgmii_tx_delay = 3; + } else { + priv->rgmii_rx_delay = val; + } + } + + of_node_put(ports); + + return 0; +} + static int qca8k_setup(struct dsa_switch *ds) { @@ -792,6 +833,10 @@ qca8k_setup(struct dsa_switch *ds) if (ret) return ret; + ret = qca8k_setup_of_rgmii_delay(priv); + if (ret) + return ret; + /* Enable CPU Port */ ret = qca8k_reg_set(priv, QCA8K_REG_GLOBAL_FW_CTRL0, QCA8K_GLOBAL_FW_CTRL0_CPU_PORT_EN); @@ -1003,8 +1048,10 @@ qca8k_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode, */ qca8k_write(priv, reg, QCA8K_PORT_PAD_RGMII_EN | - QCA8K_PORT_PAD_RGMII_TX_DELAY(QCA8K_MAX_DELAY) | - QCA8K_PORT_PAD_RGMII_RX_DELAY(QCA8K_MAX_DELAY)); + QCA8K_PORT_PAD_RGMII_TX_DELAY(priv->rgmii_tx_delay) | + QCA8K_PORT_PAD_RGMII_RX_DELAY(priv->rgmii_rx_delay) | + QCA8K_PORT_PAD_RGMII_TX_DELAY_EN | + QCA8K_PORT_PAD_RGMII_RX_DELAY_EN); /* QCA8337 requires to set rgmii rx delay */ if (data->id == QCA8K_ID_QCA8337) qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL, diff --git a/drivers/net/dsa/qca8k.h b/drivers/net/dsa/qca8k.h index 0b503f78bf92..80830bb42736 100644 --- a/drivers/net/dsa/qca8k.h +++ b/drivers/net/dsa/qca8k.h @@ -36,12 +36,11 @@ #define QCA8K_REG_PORT5_PAD_CTRL 0x008 #define QCA8K_REG_PORT6_PAD_CTRL 0x00c #define QCA8K_PORT_PAD_RGMII_EN BIT(26) -#define QCA8K_PORT_PAD_RGMII_TX_DELAY(x) \ - ((0x8 + (x & 0x3)) << 22) -#define QCA8K_PORT_PAD_RGMII_RX_DELAY(x) \ - ((0x10 + (x & 0x3)) << 20) -#define QCA8K_MAX_DELAY 3 +#define QCA8K_PORT_PAD_RGMII_TX_DELAY(x) ((x) << 22) +#define QCA8K_PORT_PAD_RGMII_RX_DELAY(x) ((x) << 20) +#define QCA8K_PORT_PAD_RGMII_TX_DELAY_EN BIT(25) #define QCA8K_PORT_PAD_RGMII_RX_DELAY_EN BIT(24) +#define QCA8K_MAX_DELAY 3 #define QCA8K_PORT_PAD_SGMII_EN BIT(7) #define QCA8K_REG_PWS 0x010 #define QCA8K_PWS_SERDES_AEN_DIS BIT(7) @@ -251,6 +250,8 @@ struct qca8k_match_data { struct qca8k_priv { u8 switch_revision; + u8 rgmii_tx_delay; + u8 rgmii_rx_delay; struct regmap *regmap; struct mii_bus *bus; struct ar8xxx_port_status port_sts[QCA8K_NUM_PORTS];
The legacy qsdk code used a different delay instead of the max value. Qsdk use 1 ps for rx and 2 ps for tx. Make these values configurable using the standard rx/tx-internal-delay-ps ethernet binding and apply qsdk values by default. The connected gmac doesn't add any delay so no additional delay is added to tx/rx. Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> --- drivers/net/dsa/qca8k.c | 51 +++++++++++++++++++++++++++++++++++++++-- drivers/net/dsa/qca8k.h | 11 +++++---- 2 files changed, 55 insertions(+), 7 deletions(-)