[PATCH 05/16] net: phy: adin: configure RGMII/RMII/MII modes on config

Alexandru Ardelean
2019-08-05T13:55:32Z

The ADIN1300 chip supports RGMII, RMII & MII modes. Default (if
unconfigured) is RGMII.
This change adds support for configuring these modes via the device
registers.

For RGMII with internal delays (modes RGMII_ID,RGMII_TXID, RGMII_RXID),
the default delay is 2 ns. This can be configurable and will be done in
a subsequent change.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---
drivers/net/phy/adin.c | 79 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 78 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/adin.c b/drivers/net/phy/adin.c
index 3dd9fe50f4c8..dbdb8f60741c 100644
--- a/drivers/net/phy/adin.c
+++ b/drivers/net/phy/adin.c
@@ -33,14 +33,91 @@
ADIN1300_INT_HW_IRQ_EN)
#define ADIN1300_INT_STATUS_REG 0x0019

+#define ADIN1300_GE_RGMII_CFG_REG 0xff23
+#define ADIN1300_GE_RGMII_RXID_EN BIT(2)
+#define ADIN1300_GE_RGMII_TXID_EN BIT(1)
+#define ADIN1300_GE_RGMII_EN BIT(0)
+
+#define ADIN1300_GE_RMII_CFG_REG 0xff24
+#define ADIN1300_GE_RMII_EN BIT(0)
+
+static int adin_config_rgmii_mode(struct phy_device *phydev,
+ phy_interface_t intf)
+{
+ int reg;
+
+ reg = phy_read_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_GE_RGMII_CFG_REG);
+ if (reg < 0)
+ return reg;
+
+ if (!phy_interface_mode_is_rgmii(intf)) {
+ reg &= ~ADIN1300_GE_RGMII_EN;
+ goto write;
+ }
+
+ reg |= ADIN1300_GE_RGMII_EN;
+
+ if (intf == PHY_INTERFACE_MODE_RGMII_ID ||
+ intf == PHY_INTERFACE_MODE_RGMII_RXID) {
+ reg |= ADIN1300_GE_RGMII_RXID_EN;
+ } else {
+ reg &= ~ADIN1300_GE_RGMII_RXID_EN;
+ }
+
+ if (intf == PHY_INTERFACE_MODE_RGMII_ID ||
+ intf == PHY_INTERFACE_MODE_RGMII_TXID) {
+ reg |= ADIN1300_GE_RGMII_TXID_EN;
+ } else {
+ reg &= ~ADIN1300_GE_RGMII_TXID_EN;
+ }
+
+write:
+ return phy_write_mmd(phydev, MDIO_MMD_VEND1,
+ ADIN1300_GE_RGMII_CFG_REG, reg);
+}
+
+static int adin_config_rmii_mode(struct phy_device *phydev,
+ phy_interface_t intf)
+{
+ int reg;
+
+ reg = phy_read_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_GE_RMII_CFG_REG);
+ if (reg < 0)
+ return reg;
+
+ if (intf != PHY_INTERFACE_MODE_RMII) {
+ reg &= ~ADIN1300_GE_RMII_EN;
+ goto write;
+ }
+
+ reg |= ADIN1300_GE_RMII_EN;
+
+write:
+ return phy_write_mmd(phydev, MDIO_MMD_VEND1,
+ ADIN1300_GE_RMII_CFG_REG, reg);
+}
+
static int adin_config_init(struct phy_device *phydev)
{
- int rc;
+ phy_interface_t interface, rc;

rc = genphy_config_init(phydev);
if (rc < 0)
return rc;

+ interface = phydev->interface;
+
+ rc = adin_config_rgmii_mode(phydev, interface);
+ if (rc < 0)
+ return rc;
+
+ rc = adin_config_rmii_mode(phydev, interface);
+ if (rc < 0)
+ return rc;
+
+ dev_info(&phydev->mdio.dev, "PHY is using mode '%s'\n",
+ phy_modes(phydev->interface));
+
return 0;
}

--
2.20.1