Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 414 insertions, 0 deletions

diff --git a/drivers/net/phy/dp83tc811.c b/drivers/net/phy/dp83tc811.c
new file mode 100644
index 0000000000..7ea32fb771
--- /dev/null
+++ b/drivers/net/phy/dp83tc811.c
@@ -0,0 +1,414 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for the Texas Instruments DP83TC811 PHY
+ *
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ */
+
+#include <linux/ethtool.h>
+#include <linux/etherdevice.h>
+#include <linux/kernel.h>
+#include <linux/mii.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/netdevice.h>
+
+#define DP83TC811_PHY_ID	0x2000a253
+#define DP83811_DEVADDR		0x1f
+
+#define MII_DP83811_SGMII_CTRL	0x09
+#define MII_DP83811_INT_STAT1	0x12
+#define MII_DP83811_INT_STAT2	0x13
+#define MII_DP83811_INT_STAT3	0x18
+#define MII_DP83811_RESET_CTRL	0x1f
+
+#define DP83811_HW_RESET	BIT(15)
+#define DP83811_SW_RESET	BIT(14)
+
+/* INT_STAT1 bits */
+#define DP83811_RX_ERR_HF_INT_EN	BIT(0)
+#define DP83811_MS_TRAINING_INT_EN	BIT(1)
+#define DP83811_ANEG_COMPLETE_INT_EN	BIT(2)
+#define DP83811_ESD_EVENT_INT_EN	BIT(3)
+#define DP83811_WOL_INT_EN		BIT(4)
+#define DP83811_LINK_STAT_INT_EN	BIT(5)
+#define DP83811_ENERGY_DET_INT_EN	BIT(6)
+#define DP83811_LINK_QUAL_INT_EN	BIT(7)
+
+/* INT_STAT2 bits */
+#define DP83811_JABBER_DET_INT_EN	BIT(0)
+#define DP83811_POLARITY_INT_EN		BIT(1)
+#define DP83811_SLEEP_MODE_INT_EN	BIT(2)
+#define DP83811_OVERTEMP_INT_EN		BIT(3)
+#define DP83811_OVERVOLTAGE_INT_EN	BIT(6)
+#define DP83811_UNDERVOLTAGE_INT_EN	BIT(7)
+
+/* INT_STAT3 bits */
+#define DP83811_LPS_INT_EN	BIT(0)
+#define DP83811_NO_FRAME_INT_EN	BIT(3)
+#define DP83811_POR_DONE_INT_EN	BIT(4)
+
+#define MII_DP83811_RXSOP1	0x04a5
+#define MII_DP83811_RXSOP2	0x04a6
+#define MII_DP83811_RXSOP3	0x04a7
+
+/* WoL Registers */
+#define MII_DP83811_WOL_CFG	0x04a0
+#define MII_DP83811_WOL_STAT	0x04a1
+#define MII_DP83811_WOL_DA1	0x04a2
+#define MII_DP83811_WOL_DA2	0x04a3
+#define MII_DP83811_WOL_DA3	0x04a4
+
+/* WoL bits */
+#define DP83811_WOL_MAGIC_EN	BIT(0)
+#define DP83811_WOL_SECURE_ON	BIT(5)
+#define DP83811_WOL_EN		BIT(7)
+#define DP83811_WOL_INDICATION_SEL BIT(8)
+#define DP83811_WOL_CLR_INDICATION BIT(11)
+
+/* SGMII CTRL bits */
+#define DP83811_TDR_AUTO		BIT(8)
+#define DP83811_SGMII_EN		BIT(12)
+#define DP83811_SGMII_AUTO_NEG_EN	BIT(13)
+#define DP83811_SGMII_TX_ERR_DIS	BIT(14)
+#define DP83811_SGMII_SOFT_RESET	BIT(15)
+
+static int dp83811_ack_interrupt(struct phy_device *phydev)
+{
+	int err;
+
+	err = phy_read(phydev, MII_DP83811_INT_STAT1);
+	if (err < 0)
+		return err;
+
+	err = phy_read(phydev, MII_DP83811_INT_STAT2);
+	if (err < 0)
+		return err;
+
+	err = phy_read(phydev, MII_DP83811_INT_STAT3);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+static int dp83811_set_wol(struct phy_device *phydev,
+			   struct ethtool_wolinfo *wol)
+{
+	struct net_device *ndev = phydev->attached_dev;
+	const u8 *mac;
+	u16 value;
+
+	if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE)) {
+		mac = (const u8 *)ndev->dev_addr;
+
+		if (!is_valid_ether_addr(mac))
+			return -EINVAL;
+
+		/* MAC addresses start with byte 5, but stored in mac[0].
+		 * 811 PHYs store bytes 4|5, 2|3, 0|1
+		 */
+		phy_write_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_DA1,
+			      (mac[1] << 8) | mac[0]);
+		phy_write_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_DA2,
+			      (mac[3] << 8) | mac[2]);
+		phy_write_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_DA3,
+			      (mac[5] << 8) | mac[4]);
+
+		value = phy_read_mmd(phydev, DP83811_DEVADDR,
+				     MII_DP83811_WOL_CFG);
+		if (wol->wolopts & WAKE_MAGIC)
+			value |= DP83811_WOL_MAGIC_EN;
+		else
+			value &= ~DP83811_WOL_MAGIC_EN;
+
+		if (wol->wolopts & WAKE_MAGICSECURE) {
+			phy_write_mmd(phydev, DP83811_DEVADDR,
+				      MII_DP83811_RXSOP1,
+				      (wol->sopass[1] << 8) | wol->sopass[0]);
+			phy_write_mmd(phydev, DP83811_DEVADDR,
+				      MII_DP83811_RXSOP2,
+				      (wol->sopass[3] << 8) | wol->sopass[2]);
+			phy_write_mmd(phydev, DP83811_DEVADDR,
+				      MII_DP83811_RXSOP3,
+				      (wol->sopass[5] << 8) | wol->sopass[4]);
+			value |= DP83811_WOL_SECURE_ON;
+		} else {
+			value &= ~DP83811_WOL_SECURE_ON;
+		}
+
+		/* Clear any pending WoL interrupt */
+		phy_read(phydev, MII_DP83811_INT_STAT1);
+
+		value |= DP83811_WOL_EN | DP83811_WOL_INDICATION_SEL |
+			 DP83811_WOL_CLR_INDICATION;
+
+		return phy_write_mmd(phydev, DP83811_DEVADDR,
+				     MII_DP83811_WOL_CFG, value);
+	} else {
+		return phy_clear_bits_mmd(phydev, DP83811_DEVADDR,
+					  MII_DP83811_WOL_CFG, DP83811_WOL_EN);
+	}
+
+}
+
+static void dp83811_get_wol(struct phy_device *phydev,
+			    struct ethtool_wolinfo *wol)
+{
+	u16 sopass_val;
+	int value;
+
+	wol->supported = (WAKE_MAGIC | WAKE_MAGICSECURE);
+	wol->wolopts = 0;
+
+	value = phy_read_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_CFG);
+
+	if (value & DP83811_WOL_MAGIC_EN)
+		wol->wolopts |= WAKE_MAGIC;
+
+	if (value & DP83811_WOL_SECURE_ON) {
+		sopass_val = phy_read_mmd(phydev, DP83811_DEVADDR,
+					  MII_DP83811_RXSOP1);
+		wol->sopass[0] = (sopass_val & 0xff);
+		wol->sopass[1] = (sopass_val >> 8);
+
+		sopass_val = phy_read_mmd(phydev, DP83811_DEVADDR,
+					  MII_DP83811_RXSOP2);
+		wol->sopass[2] = (sopass_val & 0xff);
+		wol->sopass[3] = (sopass_val >> 8);
+
+		sopass_val = phy_read_mmd(phydev, DP83811_DEVADDR,
+					  MII_DP83811_RXSOP3);
+		wol->sopass[4] = (sopass_val & 0xff);
+		wol->sopass[5] = (sopass_val >> 8);
+
+		wol->wolopts |= WAKE_MAGICSECURE;
+	}
+
+	/* WoL is not enabled so set wolopts to 0 */
+	if (!(value & DP83811_WOL_EN))
+		wol->wolopts = 0;
+}
+
+static int dp83811_config_intr(struct phy_device *phydev)
+{
+	int misr_status, err;
+
+	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
+		err = dp83811_ack_interrupt(phydev);
+		if (err)
+			return err;
+
+		misr_status = phy_read(phydev, MII_DP83811_INT_STAT1);
+		if (misr_status < 0)
+			return misr_status;
+
+		misr_status |= (DP83811_RX_ERR_HF_INT_EN |
+				DP83811_MS_TRAINING_INT_EN |
+				DP83811_ANEG_COMPLETE_INT_EN |
+				DP83811_ESD_EVENT_INT_EN |
+				DP83811_WOL_INT_EN |
+				DP83811_LINK_STAT_INT_EN |
+				DP83811_ENERGY_DET_INT_EN |
+				DP83811_LINK_QUAL_INT_EN);
+
+		err = phy_write(phydev, MII_DP83811_INT_STAT1, misr_status);
+		if (err < 0)
+			return err;
+
+		misr_status = phy_read(phydev, MII_DP83811_INT_STAT2);
+		if (misr_status < 0)
+			return misr_status;
+
+		misr_status |= (DP83811_JABBER_DET_INT_EN |
+				DP83811_POLARITY_INT_EN |
+				DP83811_SLEEP_MODE_INT_EN |
+				DP83811_OVERTEMP_INT_EN |
+				DP83811_OVERVOLTAGE_INT_EN |
+				DP83811_UNDERVOLTAGE_INT_EN);
+
+		err = phy_write(phydev, MII_DP83811_INT_STAT2, misr_status);
+		if (err < 0)
+			return err;
+
+		misr_status = phy_read(phydev, MII_DP83811_INT_STAT3);
+		if (misr_status < 0)
+			return misr_status;
+
+		misr_status |= (DP83811_LPS_INT_EN |
+				DP83811_NO_FRAME_INT_EN |
+				DP83811_POR_DONE_INT_EN);
+
+		err = phy_write(phydev, MII_DP83811_INT_STAT3, misr_status);
+
+	} else {
+		err = phy_write(phydev, MII_DP83811_INT_STAT1, 0);
+		if (err < 0)
+			return err;
+
+		err = phy_write(phydev, MII_DP83811_INT_STAT2, 0);
+		if (err < 0)
+			return err;
+
+		err = phy_write(phydev, MII_DP83811_INT_STAT3, 0);
+		if (err < 0)
+			return err;
+
+		err = dp83811_ack_interrupt(phydev);
+	}
+
+	return err;
+}
+
+static irqreturn_t dp83811_handle_interrupt(struct phy_device *phydev)
+{
+	bool trigger_machine = false;
+	int irq_status;
+
+	/* The INT_STAT registers 1, 2 and 3 are holding the interrupt status
+	 * in the upper half (15:8), while the lower half (7:0) is used for
+	 * controlling the interrupt enable state of those individual interrupt
+	 * sources. To determine the possible interrupt sources, just read the
+	 * INT_STAT* register and use it directly to know which interrupts have
+	 * been enabled previously or not.
+	 */
+	irq_status = phy_read(phydev, MII_DP83811_INT_STAT1);
+	if (irq_status < 0) {
+		phy_error(phydev);
+		return IRQ_NONE;
+	}
+	if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
+		trigger_machine = true;
+
+	irq_status = phy_read(phydev, MII_DP83811_INT_STAT2);
+	if (irq_status < 0) {
+		phy_error(phydev);
+		return IRQ_NONE;
+	}
+	if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
+		trigger_machine = true;
+
+	irq_status = phy_read(phydev, MII_DP83811_INT_STAT3);
+	if (irq_status < 0) {
+		phy_error(phydev);
+		return IRQ_NONE;
+	}
+	if (irq_status & ((irq_status & GENMASK(7, 0)) << 8))
+		trigger_machine = true;
+
+	if (!trigger_machine)
+		return IRQ_NONE;
+
+	phy_trigger_machine(phydev);
+
+	return IRQ_HANDLED;
+}
+
+static int dp83811_config_aneg(struct phy_device *phydev)
+{
+	int value, err;
+
+	if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
+		value = phy_read(phydev, MII_DP83811_SGMII_CTRL);
+		if (phydev->autoneg == AUTONEG_ENABLE) {
+			err = phy_write(phydev, MII_DP83811_SGMII_CTRL,
+					(DP83811_SGMII_AUTO_NEG_EN | value));
+			if (err < 0)
+				return err;
+		} else {
+			err = phy_write(phydev, MII_DP83811_SGMII_CTRL,
+					(~DP83811_SGMII_AUTO_NEG_EN & value));
+			if (err < 0)
+				return err;
+		}
+	}
+
+	return genphy_config_aneg(phydev);
+}
+
+static int dp83811_config_init(struct phy_device *phydev)
+{
+	int value, err;
+
+	value = phy_read(phydev, MII_DP83811_SGMII_CTRL);
+	if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
+		err = phy_write(phydev, MII_DP83811_SGMII_CTRL,
+					(DP83811_SGMII_EN | value));
+	} else {
+		err = phy_write(phydev, MII_DP83811_SGMII_CTRL,
+				(~DP83811_SGMII_EN & value));
+	}
+
+	if (err < 0)
+
+		return err;
+
+	value = DP83811_WOL_MAGIC_EN | DP83811_WOL_SECURE_ON | DP83811_WOL_EN;
+
+	return phy_clear_bits_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_CFG,
+				  value);
+}
+
+static int dp83811_phy_reset(struct phy_device *phydev)
+{
+	int err;
+
+	err = phy_write(phydev, MII_DP83811_RESET_CTRL, DP83811_HW_RESET);
+	if (err < 0)
+		return err;
+
+	return 0;
+}
+
+static int dp83811_suspend(struct phy_device *phydev)
+{
+	int value;
+
+	value = phy_read_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_CFG);
+
+	if (!(value & DP83811_WOL_EN))
+		genphy_suspend(phydev);
+
+	return 0;
+}
+
+static int dp83811_resume(struct phy_device *phydev)
+{
+	genphy_resume(phydev);
+
+	phy_set_bits_mmd(phydev, DP83811_DEVADDR, MII_DP83811_WOL_CFG,
+			 DP83811_WOL_CLR_INDICATION);
+
+	return 0;
+}
+
+static struct phy_driver dp83811_driver[] = {
+	{
+		.phy_id = DP83TC811_PHY_ID,
+		.phy_id_mask = 0xfffffff0,
+		.name = "TI DP83TC811",
+		/* PHY_BASIC_FEATURES */
+		.config_init = dp83811_config_init,
+		.config_aneg = dp83811_config_aneg,
+		.soft_reset = dp83811_phy_reset,
+		.get_wol = dp83811_get_wol,
+		.set_wol = dp83811_set_wol,
+		.config_intr = dp83811_config_intr,
+		.handle_interrupt = dp83811_handle_interrupt,
+		.suspend = dp83811_suspend,
+		.resume = dp83811_resume,
+	 },
+};
+module_phy_driver(dp83811_driver);
+
+static struct mdio_device_id __maybe_unused dp83811_tbl[] = {
+	{ DP83TC811_PHY_ID, 0xfffffff0 },
+	{ },
+};
+MODULE_DEVICE_TABLE(mdio, dp83811_tbl);
+
+MODULE_DESCRIPTION("Texas Instruments DP83TC811 PHY driver");
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com");
+MODULE_LICENSE("GPL");