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Message-ID: <20180425184944.24939-1-Nisar.Sayed@microchip.com>
Date: Thu, 26 Apr 2018 00:19:44 +0530
From: Nisar Sayed <Nisar.Sayed@...rochip.com>
To: <davem@...emloft.net>
CC: <UNGLinuxDriver@...rochip.com>, <netdev@...r.kernel.org>
Subject: [PATCH net-next] microchipT1phy: Add driver for Microchip LAN87XX T1 PHYs
Add driver for Microchip LAN87XX T1 PHYs
This patch support driver for Microchp T1 PHYs.
There will be followup patches to this driver to support T1 PHY
features such as cable diagnostics, signal quality indicator(SQI),
sleep and wakeup (TC10) support.
Signed-off-by: Nisar Sayed <Nisar.Sayed@...rochip.com>
---
drivers/net/phy/Kconfig | 5 ++
drivers/net/phy/Makefile | 1 +
drivers/net/phy/microchipT1phy.c | 116 +++++++++++++++++++++++++++++++++++++++
include/linux/microchipT1phy.h | 28 ++++++++++
4 files changed, 150 insertions(+)
create mode 100644 drivers/net/phy/microchipT1phy.c
create mode 100644 include/linux/microchipT1phy.h
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index bdfbabb..7b0b351 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -354,6 +354,11 @@ config MICROCHIP_PHY
help
Supports the LAN88XX PHYs.
+config MICROCHIP_T1_PHY
+ tristate "Microchip T1 PHYs"
+ ---help---
+ Supports the LAN87XX PHYs.
+
config MICROSEMI_PHY
tristate "Microsemi PHYs"
---help---
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index 01acbcb..5706613 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_MESON_GXL_PHY) += meson-gxl.o
obj-$(CONFIG_MICREL_KS8995MA) += spi_ks8995.o
obj-$(CONFIG_MICREL_PHY) += micrel.o
obj-$(CONFIG_MICROCHIP_PHY) += microchip.o
+obj-$(CONFIG_MICROCHIP_T1_PHY) += microchipT1phy.o
obj-$(CONFIG_MICROSEMI_PHY) += mscc.o
obj-$(CONFIG_NATIONAL_PHY) += national.o
obj-$(CONFIG_QSEMI_PHY) += qsemi.o
diff --git a/drivers/net/phy/microchipT1phy.c b/drivers/net/phy/microchipT1phy.c
new file mode 100644
index 0000000..15fbb04
--- /dev/null
+++ b/drivers/net/phy/microchipT1phy.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2018 Microchip Technology
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/phy.h>
+#include <linux/microchipT1phy.h>
+
+#define DRIVER_AUTHOR "Nisar Sayed <nisar.sayed@...rochip.com>"
+#define DRIVER_DESC "Microchip LAN87XX T1 PHY driver"
+
+struct lan87xx_priv {
+ int chip_id;
+ int chip_rev;
+};
+
+static int lan87xx_phy_config_intr(struct phy_device *phydev)
+{
+ int rc = 0;
+
+ if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
+ /* unmask all source and clear them before enable */
+ rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, 0x7FFF);
+ rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
+ rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK,
+ LAN87XX_MASK_LINK_UP | LAN87XX_MASK_LINK_DOWN);
+ } else {
+ rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, 0);
+ }
+
+ return rc < 0 ? rc : 0;
+}
+
+static int lan87xx_phy_ack_interrupt(struct phy_device *phydev)
+{
+ int rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
+
+ return rc < 0 ? rc : 0;
+}
+
+static int lan87xx_probe(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ struct lan87xx_priv *priv;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ /* these values can be used to identify internal PHY */
+ priv->chip_id = phy_read(phydev, MII_PHYSID1);
+ priv->chip_rev = phy_read(phydev, MII_PHYSID2);
+
+ phydev->priv = priv;
+
+ return 0;
+}
+
+static void lan87xx_remove(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ struct lan87xx_priv *priv = phydev->priv;
+
+ if (priv)
+ devm_kfree(dev, priv);
+}
+
+static struct phy_driver microchip_T1_phy_driver[] = {
+ {
+ .phy_id = 0x0007c150,
+ .phy_id_mask = 0xfffffff0,
+ .name = "Microchip LAN87xx",
+
+ .features = SUPPORTED_100baseT_Full,
+ .flags = PHY_HAS_INTERRUPT,
+
+ .probe = lan87xx_probe,
+ .remove = lan87xx_remove,
+
+ .config_init = genphy_config_init,
+ .config_aneg = genphy_config_aneg,
+
+ .ack_interrupt = lan87xx_phy_ack_interrupt,
+ .config_intr = lan87xx_phy_config_intr,
+
+ .suspend = genphy_suspend,
+ .resume = genphy_resume,
+ }
+};
+
+module_phy_driver(microchip_T1_phy_driver);
+
+static struct mdio_device_id __maybe_unused microchip_T1_tbl[] = {
+ { 0x0007c150, 0xfffffff0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(mdio, microchip_T1_tbl);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
diff --git a/include/linux/microchipT1phy.h b/include/linux/microchipT1phy.h
new file mode 100644
index 0000000..7353e7c
--- /dev/null
+++ b/include/linux/microchipT1phy.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2018 Microchip Technology
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _MICROCHIPT1PHY_H_
+#define _MICROCHIPT1PHY_H_
+
+/* Interrupt Source Register */
+#define LAN87XX_INTERRUPT_SOURCE (0x18)
+
+/* Interrupt Mask Register */
+#define LAN87XX_INTERRUPT_MASK (0x19)
+#define LAN87XX_MASK_LINK_UP (0x0004)
+#define LAN87XX_MASK_LINK_DOWN (0x0002)
+
+#endif /* _MICROCHIPT1PHY_H_ */
--
2.14.1
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