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-rw-r--r--doc/device-tree-bindings/net/phy/atheros.txt35
-rw-r--r--drivers/net/phy/atheros.c224
-rw-r--r--include/dt-bindings/net/qca-ar803x.h13
3 files changed, 270 insertions, 2 deletions
diff --git a/doc/device-tree-bindings/net/phy/atheros.txt b/doc/device-tree-bindings/net/phy/atheros.txt
new file mode 100644
index 0000000000..97e97b8c13
--- /dev/null
+++ b/doc/device-tree-bindings/net/phy/atheros.txt
@@ -0,0 +1,35 @@
+* Qualcomm Atheros PHY Device Tree binding
+
+Required properties:
+- reg: PHY address
+
+Optional properties:
+- qca,clk-out-frequency: Clock frequency of the CLK_25M pin in Hz.
+ Either 25000000, 50000000, 62500000 or 125000000.
+- qca,clk-out-strength: Clock output buffer driver strength.
+ Supported values are defined in dt-bindings/net/qca-ar803x.h
+- qca,keep-pll-enabled: Keep the PLL running if no link is present.
+ Don't go into hibernation mode.
+ Only supported on the AR8031/AR8033.
+- vddio-supply: RGMII I/O voltage regulator
+ Only supported on the AR8031/AR8033.
+
+Optional subnodes:
+- vddio-regulator: Initial data for the VDDIO regulator, as covered
+ doc/device-tree-bindings/regulator/regulator.txt
+
+Example:
+ #include <dt-bindings/net/qca-ar803x.h>
+
+ ethernet-phy@0 {
+ reg = <0>;
+ qca-clk-out-frequency = <125000000>;
+ qca,keep-pll-enabled;
+
+ vddio-supply = <&vddio>;
+
+ vddio: vddio-regulator {
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+ };
diff --git a/drivers/net/phy/atheros.c b/drivers/net/phy/atheros.c
index 22035c2496..3cd301c50e 100644
--- a/drivers/net/phy/atheros.c
+++ b/drivers/net/phy/atheros.c
@@ -4,21 +4,41 @@
*
* Copyright 2011, 2013 Freescale Semiconductor, Inc.
* author Andy Fleming
+ * Copyright (c) 2019 Michael Walle <michael@walle.cc>
*/
#include <common.h>
#include <phy.h>
+#include <dm/device_compat.h>
+#include <linux/bitfield.h>
+#include <dt-bindings/net/qca-ar803x.h>
#define AR803x_PHY_DEBUG_ADDR_REG 0x1d
#define AR803x_PHY_DEBUG_DATA_REG 0x1e
+/* Debug registers */
+#define AR803x_DEBUG_REG_0 0x0
+#define AR803x_RGMII_RX_CLK_DLY BIT(15)
+
#define AR803x_DEBUG_REG_5 0x5
#define AR803x_RGMII_TX_CLK_DLY BIT(8)
-#define AR803x_DEBUG_REG_0 0x0
-#define AR803x_RGMII_RX_CLK_DLY BIT(15)
+#define AR803x_DEBUG_REG_1F 0x1f
+#define AR803x_PLL_ON BIT(2)
+#define AR803x_RGMII_1V8 BIT(3)
/* CLK_25M register is at MMD 7, address 0x8016 */
#define AR803x_CLK_25M_SEL_REG 0x8016
+
+#define AR803x_CLK_25M_MASK GENMASK(4, 2)
+#define AR803x_CLK_25M_25MHZ_XTAL 0
+#define AR803x_CLK_25M_25MHZ_DSP 1
+#define AR803x_CLK_25M_50MHZ_PLL 2
+#define AR803x_CLK_25M_50MHZ_DSP 3
+#define AR803x_CLK_25M_62_5MHZ_PLL 4
+#define AR803x_CLK_25M_62_5MHZ_DSP 5
+#define AR803x_CLK_25M_125MHZ_PLL 6
+#define AR803x_CLK_25M_125MHZ_DSP 7
+
/* AR8035: Select frequency on CLK_25M pin through bits 4:3 */
#define AR8035_CLK_25M_FREQ_25M (0 | 0)
#define AR8035_CLK_25M_FREQ_50M (0 | BIT(3))
@@ -26,10 +46,23 @@
#define AR8035_CLK_25M_FREQ_125M (BIT(4) | BIT(3))
#define AR8035_CLK_25M_MASK GENMASK(4, 3)
+#define AR803x_CLK_25M_DR_MASK GENMASK(8, 7)
+#define AR803x_CLK_25M_DR_FULL 0
+#define AR803x_CLK_25M_DR_HALF 1
+#define AR803x_CLK_25M_DR_QUARTER 2
+
#define AR8021_PHY_ID 0x004dd040
#define AR8031_PHY_ID 0x004dd074
#define AR8035_PHY_ID 0x004dd072
+struct ar803x_priv {
+ int flags;
+#define AR803x_FLAG_KEEP_PLL_ENABLED BIT(0) /* don't turn off internal PLL */
+#define AR803x_FLAG_RGMII_1V8 BIT(1) /* use 1.8V RGMII I/O voltage */
+ u16 clk_25m_reg;
+ u16 clk_25m_mask;
+};
+
static int ar803x_debug_reg_read(struct phy_device *phydev, u16 reg)
{
int ret;
@@ -113,14 +146,193 @@ static int ar803x_delay_config(struct phy_device *phydev)
return ret;
}
+static int ar803x_regs_config(struct phy_device *phydev)
+{
+ struct ar803x_priv *priv = phydev->priv;
+ u16 set = 0, clear = 0;
+ int val;
+ int ret;
+
+ /* no configuration available */
+ if (!priv)
+ return 0;
+
+ /*
+ * Only supported on the AR8031, AR8035 has strappings for the PLL mode
+ * as well as the RGMII voltage.
+ */
+ if (phydev->drv->uid == AR8031_PHY_ID) {
+ if (priv->flags & AR803x_FLAG_KEEP_PLL_ENABLED)
+ set |= AR803x_PLL_ON;
+ else
+ clear |= AR803x_PLL_ON;
+
+ if (priv->flags & AR803x_FLAG_RGMII_1V8)
+ set |= AR803x_RGMII_1V8;
+ else
+ clear |= AR803x_RGMII_1V8;
+
+ ret = ar803x_debug_reg_mask(phydev, AR803x_DEBUG_REG_1F, clear,
+ set);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* save the write access if the mask is empty */
+ if (priv->clk_25m_mask) {
+ val = phy_read_mmd(phydev, MDIO_MMD_AN, AR803x_CLK_25M_SEL_REG);
+ if (val < 0)
+ return val;
+ val &= ~priv->clk_25m_mask;
+ val |= priv->clk_25m_reg;
+ ret = phy_write_mmd(phydev, MDIO_MMD_AN,
+ AR803x_CLK_25M_SEL_REG, val);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ar803x_of_init(struct phy_device *phydev)
+{
+#if defined(CONFIG_DM_ETH)
+ struct ar803x_priv *priv;
+ ofnode node, vddio_reg_node;
+ u32 strength, freq, min_uV, max_uV;
+ int sel;
+
+ node = phy_get_ofnode(phydev);
+ if (!ofnode_valid(node))
+ return -EINVAL;
+
+ priv = malloc(sizeof(*priv));
+ if (!priv)
+ return -ENOMEM;
+ memset(priv, 0, sizeof(*priv));
+
+ phydev->priv = priv;
+
+ debug("%s: found PHY node: %s\n", __func__, ofnode_get_name(node));
+
+ if (ofnode_read_bool(node, "qca,keep-pll-enabled"))
+ priv->flags |= AR803x_FLAG_KEEP_PLL_ENABLED;
+
+ /*
+ * We can't use the regulator framework because the regulator is
+ * a subnode of the PHY. So just read the two properties we are
+ * interested in.
+ */
+ vddio_reg_node = ofnode_find_subnode(node, "vddio-regulator");
+ if (ofnode_valid(vddio_reg_node)) {
+ min_uV = ofnode_read_u32_default(vddio_reg_node,
+ "regulator-min-microvolt", 0);
+ max_uV = ofnode_read_u32_default(vddio_reg_node,
+ "regulator-max-microvolt", 0);
+
+ if (min_uV != max_uV) {
+ free(priv);
+ return -EINVAL;
+ }
+
+ switch (min_uV) {
+ case 1500000:
+ break;
+ case 1800000:
+ priv->flags |= AR803x_FLAG_RGMII_1V8;
+ break;
+ default:
+ free(priv);
+ return -EINVAL;
+ }
+ }
+
+ /*
+ * Get the CLK_25M frequency from the device tree. Only XTAL and PLL
+ * sources are supported right now. There is also the possibilty to use
+ * the DSP as frequency reference, this is used for synchronous
+ * ethernet.
+ */
+ if (!ofnode_read_u32(node, "qca,clk-out-frequency", &freq)) {
+ switch (freq) {
+ case 25000000:
+ sel = AR803x_CLK_25M_25MHZ_XTAL;
+ break;
+ case 50000000:
+ sel = AR803x_CLK_25M_50MHZ_PLL;
+ break;
+ case 62500000:
+ sel = AR803x_CLK_25M_62_5MHZ_PLL;
+ break;
+ case 125000000:
+ sel = AR803x_CLK_25M_125MHZ_PLL;
+ break;
+ default:
+ dev_err(phydev->dev,
+ "invalid qca,clk-out-frequency\n");
+ free(priv);
+ return -EINVAL;
+ }
+
+ priv->clk_25m_mask |= AR803x_CLK_25M_MASK;
+ priv->clk_25m_reg |= FIELD_PREP(AR803x_CLK_25M_MASK, sel);
+ /*
+ * Fixup for the AR8035 which only has two bits. The two
+ * remaining bits map to the same frequencies.
+ */
+ if (phydev->drv->uid == AR8035_PHY_ID) {
+ u16 clear = AR803x_CLK_25M_MASK & AR8035_CLK_25M_MASK;
+
+ priv->clk_25m_mask &= ~clear;
+ priv->clk_25m_reg &= ~clear;
+ }
+ }
+
+ if (phydev->drv->uid == AR8031_PHY_ID &&
+ !ofnode_read_u32(node, "qca,clk-out-strength", &strength)) {
+ switch (strength) {
+ case AR803X_STRENGTH_FULL:
+ sel = AR803x_CLK_25M_DR_FULL;
+ break;
+ case AR803X_STRENGTH_HALF:
+ sel = AR803x_CLK_25M_DR_HALF;
+ break;
+ case AR803X_STRENGTH_QUARTER:
+ sel = AR803x_CLK_25M_DR_QUARTER;
+ break;
+ default:
+ dev_err(phydev->dev,
+ "invalid qca,clk-out-strength\n");
+ free(priv);
+ return -EINVAL;
+ }
+ priv->clk_25m_mask |= AR803x_CLK_25M_DR_MASK;
+ priv->clk_25m_reg |= FIELD_PREP(AR803x_CLK_25M_DR_MASK, sel);
+ }
+
+ debug("%s: flags=%x clk_25m_reg=%04x clk_25m_mask=%04x\n", __func__,
+ priv->flags, priv->clk_25m_reg, priv->clk_25m_mask);
+#endif
+
+ return 0;
+}
+
static int ar8031_config(struct phy_device *phydev)
{
int ret;
+ ret = ar803x_of_init(phydev);
+ if (ret < 0)
+ return ret;
+
ret = ar803x_delay_config(phydev);
if (ret < 0)
return ret;
+ ret = ar803x_regs_config(phydev);
+ if (ret < 0)
+ return ret;
+
phydev->supported = phydev->drv->features;
genphy_config_aneg(phydev);
@@ -134,6 +346,10 @@ static int ar8035_config(struct phy_device *phydev)
int ret;
int regval;
+ ret = ar803x_of_init(phydev);
+ if (ret < 0)
+ return ret;
+
/* Configure CLK_25M output clock at 125 MHz */
regval = phy_read_mmd(phydev, MDIO_MMD_AN, AR803x_CLK_25M_SEL_REG);
regval &= ~AR8035_CLK_25M_MASK; /* No surprises */
@@ -144,6 +360,10 @@ static int ar8035_config(struct phy_device *phydev)
if (ret < 0)
return ret;
+ ret = ar803x_regs_config(phydev);
+ if (ret < 0)
+ return ret;
+
phydev->supported = phydev->drv->features;
genphy_config_aneg(phydev);
diff --git a/include/dt-bindings/net/qca-ar803x.h b/include/dt-bindings/net/qca-ar803x.h
new file mode 100644
index 0000000000..9c046c7242
--- /dev/null
+++ b/include/dt-bindings/net/qca-ar803x.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Device Tree constants for the Qualcomm Atheros AR803x PHYs
+ */
+
+#ifndef _DT_BINDINGS_QCA_AR803X_H
+#define _DT_BINDINGS_QCA_AR803X_H
+
+#define AR803X_STRENGTH_FULL 0
+#define AR803X_STRENGTH_HALF 1
+#define AR803X_STRENGTH_QUARTER 2
+
+#endif
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-03 19:01:34 +0000