[U-Boot] [PATCH] net: phy: Add support for Texas Instruments DP83867
Michal Simek
michal.simek at xilinx.com
Tue Oct 27 16:04:50 CET 2015
From: "Edgar E. Iglesias" <edgar.iglesias at xilinx.com>
Code is taken from Linux kernel driver.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias at xilinx.com>
Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---
drivers/net/phy/Makefile | 1 +
drivers/net/phy/phy.c | 3 +
drivers/net/phy/ti.c | 205 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 209 insertions(+)
create mode 100644 drivers/net/phy/ti.c
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index d096db87a276..9e4d4927e676 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -24,4 +24,5 @@ obj-$(CONFIG_PHY_NATSEMI) += natsemi.o
obj-$(CONFIG_PHY_REALTEK) += realtek.o
obj-$(CONFIG_PHY_SMSC) += smsc.o
obj-$(CONFIG_PHY_TERANETICS) += teranetics.o
+obj-$(CONFIG_PHY_TI) += ti.o
obj-$(CONFIG_PHY_VITESSE) += vitesse.o
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index a6023f1033ec..c6046e4abc4e 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -484,6 +484,9 @@ int phy_init(void)
#ifdef CONFIG_PHY_TERANETICS
phy_teranetics_init();
#endif
+#ifdef CONFIG_PHY_TI
+ phy_ti_init();
+#endif
#ifdef CONFIG_PHY_VITESSE
phy_vitesse_init();
#endif
diff --git a/drivers/net/phy/ti.c b/drivers/net/phy/ti.c
new file mode 100644
index 000000000000..bb30450d7531
--- /dev/null
+++ b/drivers/net/phy/ti.c
@@ -0,0 +1,205 @@
+/*
+ * TI PHY drivers
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ */
+#include <common.h>
+#include <phy.h>
+
+/* TI DP83867 */
+#define DP83867_DEVADDR 0x1f
+
+#define MII_DP83867_PHYCTRL 0x10
+#define MII_DP83867_MICR 0x12
+#define DP83867_CTRL 0x1f
+
+/* Extended Registers */
+#define DP83867_RGMIICTL 0x0032
+#define DP83867_RGMIIDCTL 0x0086
+
+/* FIXME this is consolidated in the latest U-Boot version */
+#define BIT(x) (1UL << (x))
+
+#define DP83867_SW_RESET (1 << 15)
+#define DP83867_SW_RESTART (1 << 14)
+
+/* MICR Interrupt bits */
+#define MII_DP83867_MICR_AN_ERR_INT_EN BIT(15)
+#define MII_DP83867_MICR_SPEED_CHNG_INT_EN BIT(14)
+#define MII_DP83867_MICR_DUP_MODE_CHNG_INT_EN BIT(13)
+#define MII_DP83867_MICR_PAGE_RXD_INT_EN BIT(12)
+#define MII_DP83867_MICR_AUTONEG_COMP_INT_EN BIT(11)
+#define MII_DP83867_MICR_LINK_STS_CHNG_INT_EN BIT(10)
+#define MII_DP83867_MICR_FALSE_CARRIER_INT_EN BIT(8)
+#define MII_DP83867_MICR_SLEEP_MODE_CHNG_INT_EN BIT(4)
+#define MII_DP83867_MICR_WOL_INT_EN BIT(3)
+#define MII_DP83867_MICR_XGMII_ERR_INT_EN BIT(2)
+#define MII_DP83867_MICR_POL_CHNG_INT_EN BIT(1)
+#define MII_DP83867_MICR_JABBER_INT_EN BIT(0)
+
+/* RGMIICTL bits */
+#define DP83867_RGMII_TX_CLK_DELAY_EN BIT(1)
+#define DP83867_RGMII_RX_CLK_DELAY_EN BIT(0)
+
+/* PHY CTRL bits */
+#define DP83867_PHYCR_FIFO_DEPTH_SHIFT 14
+
+/* RGMIIDCTL bits */
+#define DP83867_RGMII_TX_CLK_DELAY_SHIFT 4
+
+#define MII_MMD_CTRL 0x0d /* MMD Access Control Register */
+#define MII_MMD_DATA 0x0e /* MMD Access Data Register */
+
+/* MMD Access Control register fields */
+#define MII_MMD_CTRL_DEVAD_MASK 0x1f /* Mask MMD DEVAD*/
+#define MII_MMD_CTRL_ADDR 0x0000 /* Address */
+#define MII_MMD_CTRL_NOINCR 0x4000 /* no post increment */
+#define MII_MMD_CTRL_INCR_RDWT 0x8000 /* post increment on reads & writes */
+#define MII_MMD_CTRL_INCR_ON_WT 0xC000 /* post increment on writes only */
+
+/* FIXME: These indirect PHY writes should go into common code. */
+
+/**
+ * phy_read_mmd_indirect - reads data from the MMD registers
+ * @phydev: The PHY device bus
+ * @prtad: MMD Address
+ * @devad: MMD DEVAD
+ * @addr: PHY address on the MII bus
+ *
+ * Description: it reads data from the MMD registers (clause 22 to access to
+ * clause 45) of the specified phy address.
+ * To read these register we have:
+ * 1) Write reg 13 // DEVAD
+ * 2) Write reg 14 // MMD Address
+ * 3) Write reg 13 // MMD Data Command for MMD DEVAD
+ * 3) Read reg 14 // Read MMD data
+ */
+int phy_read_mmd_indirect(struct phy_device *phydev, int prtad,
+ int devad, int addr)
+{
+ int value = -1;
+
+ /* Write the desired MMD Devad */
+ phy_write(phydev, addr, MII_MMD_CTRL, devad);
+
+ /* Write the desired MMD register address */
+ phy_write(phydev, addr, MII_MMD_DATA, prtad);
+
+ /* Select the Function : DATA with no post increment */
+ phy_write(phydev, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
+
+ /* Read the content of the MMD's selected register */
+ value = phy_read(phydev, addr, MII_MMD_DATA);
+ return value;
+}
+
+/**
+ * phy_write_mmd_indirect - writes data to the MMD registers
+ * @phydev: The PHY device
+ * @prtad: MMD Address
+ * @devad: MMD DEVAD
+ * @addr: PHY address on the MII bus
+ * @data: data to write in the MMD register
+ *
+ * Description: Write data from the MMD registers of the specified
+ * phy address.
+ * To write these register we have:
+ * 1) Write reg 13 // DEVAD
+ * 2) Write reg 14 // MMD Address
+ * 3) Write reg 13 // MMD Data Command for MMD DEVAD
+ * 3) Write reg 14 // Write MMD data
+ */
+void phy_write_mmd_indirect(struct phy_device *phydev, int prtad,
+ int devad, int addr, u32 data)
+{
+ /* Write the desired MMD Devad */
+ phy_write(phydev, addr, MII_MMD_CTRL, devad);
+
+ /* Write the desired MMD register address */
+ phy_write(phydev, addr, MII_MMD_DATA, prtad);
+
+ /* Select the Function : DATA with no post increment */
+ phy_write(phydev, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
+
+ /* Write the data into MMD's selected register */
+ phy_write(phydev, addr, MII_MMD_DATA, data);
+}
+
+/**
+ * phy_interface_is_rgmii - Convenience function for testing if a PHY interface
+ * is RGMII (all variants)
+ * @phydev: the phy_device struct
+ */
+static inline bool phy_interface_is_rgmii(struct phy_device *phydev)
+{
+ return phydev->interface >= PHY_INTERFACE_MODE_RGMII &&
+ phydev->interface <= PHY_INTERFACE_MODE_RGMII_TXID;
+}
+
+/* User setting - can be taken from DTS */
+#define RX_ID_DELAY 8
+#define TX_ID_DELAY 0xa
+#define FIFO_DEPTH 1
+
+static int dp83867_config(struct phy_device *phydev)
+{
+ unsigned int val, delay;
+ int ret;
+
+ /* Restart the PHY. */
+ val = phy_read(phydev, MDIO_DEVAD_NONE, DP83867_CTRL);
+ phy_write(phydev, MDIO_DEVAD_NONE, DP83867_CTRL,
+ val | DP83867_SW_RESTART);
+
+ if (phy_interface_is_rgmii(phydev)) {
+ ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_PHYCTRL,
+ (FIFO_DEPTH << DP83867_PHYCR_FIFO_DEPTH_SHIFT));
+ if (ret)
+ return ret;
+ }
+
+ if ((phydev->interface >= PHY_INTERFACE_MODE_RGMII_ID) &&
+ (phydev->interface <= PHY_INTERFACE_MODE_RGMII_RXID)) {
+ val = phy_read_mmd_indirect(phydev, DP83867_RGMIICTL,
+ DP83867_DEVADDR, phydev->addr);
+
+ if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
+ val |= (DP83867_RGMII_TX_CLK_DELAY_EN |
+ DP83867_RGMII_RX_CLK_DELAY_EN);
+
+ if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
+ val |= DP83867_RGMII_TX_CLK_DELAY_EN;
+
+ if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
+ val |= DP83867_RGMII_RX_CLK_DELAY_EN;
+
+ phy_write_mmd_indirect(phydev, DP83867_RGMIICTL,
+ DP83867_DEVADDR, phydev->addr, val);
+
+ delay = (RX_ID_DELAY |
+ (TX_ID_DELAY << DP83867_RGMII_TX_CLK_DELAY_SHIFT));
+
+ phy_write_mmd_indirect(phydev, DP83867_RGMIIDCTL,
+ DP83867_DEVADDR, phydev->addr, delay);
+ }
+
+ genphy_config_aneg(phydev);
+ return 0;
+}
+
+static struct phy_driver DP83867_driver = {
+ .name = "TI DP83867",
+ .uid = 0x2000a231,
+ .mask = 0xfffffff0,
+ .features = PHY_GBIT_FEATURES,
+ .config = &dp83867_config,
+ .startup = &genphy_startup,
+ .shutdown = &genphy_shutdown,
+};
+
+int phy_ti_init(void)
+{
+ phy_register(&DP83867_driver);
+ return 0;
+}
--
2.5.0
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