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authorNisar Sayed <Nisar.Sayed@microchip.com>2018-05-02 21:09:17 +0530
committerDavid S. Miller <davem@davemloft.net>2018-05-10 14:16:36 -0400
commit3e50d2da5850dd126b3e6a6e4387620d55b71db4 (patch)
treeb2d41c78ca95d2d5f5a4d41ab168dd18d6f01bce
parentdb1617a11a86fc7402b06b96b8fd173c54085f03 (diff)
downloadlinux-3e50d2da5850dd126b3e6a6e4387620d55b71db4.tar.bz2
microchip_t1: 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@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/phy/Kconfig5
-rw-r--r--drivers/net/phy/Makefile1
-rw-r--r--drivers/net/phy/microchip_t1.c74
3 files changed, 80 insertions, 0 deletions
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index edb8b9ab827f..ae2d69170dc3 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -360,6 +360,11 @@ 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 701ca0b8717e..22183b9d7e08 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -71,6 +71,7 @@ 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-$(CONFIG_MICROCHIP_T1_PHY) += microchip_t1.o
obj-$(CONFIG_MICROSEMI_PHY) += mscc.o
obj-$(CONFIG_NATIONAL_PHY) += national.o
obj-$(CONFIG_QSEMI_PHY) += qsemi.o
diff --git a/drivers/net/phy/microchip_t1.c b/drivers/net/phy/microchip_t1.c
new file mode 100644
index 000000000000..b1917dd1978a
--- /dev/null
+++ b/drivers/net/phy/microchip_t1.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Microchip Technology
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/phy.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)
+
+#define DRIVER_AUTHOR "Nisar Sayed <nisar.sayed@microchip.com>"
+#define DRIVER_DESC "Microchip LAN87XX T1 PHY driver"
+
+static int lan87xx_phy_config_intr(struct phy_device *phydev)
+{
+ int rc, val = 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);
+ val = LAN87XX_MASK_LINK_UP | LAN87XX_MASK_LINK_DOWN;
+ }
+
+ rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, val);
+
+ 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 struct phy_driver microchip_t1_phy_driver[] = {
+ {
+ .phy_id = 0x0007c150,
+ .phy_id_mask = 0xfffffff0,
+ .name = "Microchip LAN87xx T1",
+
+ .features = SUPPORTED_100baseT_Full,
+ .flags = PHY_HAS_INTERRUPT,
+
+ .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");