net: phy: dp83848: Add TI DP83848 Ethernet PHY

Add support for the TI DP83848 Ethernet PHY device.

The DP83848 is a highly reliable, feature rich, IEEE 802.3 compliant
single port 10/100 Mb/s Ethernet Physical Layer Transceiver supporting
the MII and RMII interfaces.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 11e3975..436972b 100644 (file)
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -122,6 +122,11 @@ config MICREL_PHY
        ---help---
          Supports the KSZ9021, VSC8201, KS8001 PHYs.
 
+config DP83848_PHY
+       tristate "Driver for Texas Instruments DP83848 PHY"
+       ---help---
+         Supports the DP83848 PHY.
+
 config DP83867_PHY
        tristate "Drivers for Texas Instruments DP83867 Gigabit PHY"
        ---help---

diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index 87f079c..b748224 100644 (file)
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -24,6 +24,7 @@ obj-$(CONFIG_MDIO_BITBANG)    += mdio-bitbang.o
 obj-$(CONFIG_MDIO_GPIO)                += mdio-gpio.o
 obj-$(CONFIG_NATIONAL_PHY)     += national.o
 obj-$(CONFIG_DP83640_PHY)      += dp83640.o
+obj-$(CONFIG_DP83848_PHY)      += dp83848.o
 obj-$(CONFIG_DP83867_PHY)      += dp83867.o
 obj-$(CONFIG_STE10XP)          += ste10Xp.o
 obj-$(CONFIG_MICREL_PHY)       += micrel.o

diff --git a/drivers/net/phy/dp83848.c b/drivers/net/phy/dp83848.c
new file mode 100644 (file)
index 0000000..5ce9bef
--- /dev/null
+++ b/drivers/net/phy/dp83848.c
@@ -0,0 +1,99 @@
+/*
+ * Driver for the Texas Instruments DP83848 PHY
+ *
+ * Copyright (C) 2015 Texas Instruments Inc.
+ *
+ * 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.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/phy.h>
+
+#define DP83848_PHY_ID                 0x20005c90
+
+/* Registers */
+#define DP83848_MICR                   0x11
+#define DP83848_MISR                   0x12
+
+/* MICR Register Fields */
+#define DP83848_MICR_INT_OE            BIT(0) /* Interrupt Output Enable */
+#define DP83848_MICR_INTEN             BIT(1) /* Interrupt Enable */
+
+/* MISR Register Fields */
+#define DP83848_MISR_RHF_INT_EN                BIT(0) /* Receive Error Counter */
+#define DP83848_MISR_FHF_INT_EN                BIT(1) /* False Carrier Counter */
+#define DP83848_MISR_ANC_INT_EN                BIT(2) /* Auto-negotiation complete */
+#define DP83848_MISR_DUP_INT_EN                BIT(3) /* Duplex Status */
+#define DP83848_MISR_SPD_INT_EN                BIT(4) /* Speed status */
+#define DP83848_MISR_LINK_INT_EN       BIT(5) /* Link status */
+#define DP83848_MISR_ED_INT_EN         BIT(6) /* Energy detect */
+#define DP83848_MISR_LQM_INT_EN                BIT(7) /* Link Quality Monitor */
+
+static int dp83848_ack_interrupt(struct phy_device *phydev)
+{
+       int err = phy_read(phydev, DP83848_MISR);
+
+       return err < 0 ? err : 0;
+}
+
+static int dp83848_config_intr(struct phy_device *phydev)
+{
+       int err;
+
+       if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
+               err = phy_write(phydev, DP83848_MICR,
+                               DP83848_MICR_INT_OE |
+                               DP83848_MICR_INTEN);
+               if (err < 0)
+                       return err;
+
+               return phy_write(phydev, DP83848_MISR,
+                                DP83848_MISR_ANC_INT_EN |
+                                DP83848_MISR_DUP_INT_EN |
+                                DP83848_MISR_SPD_INT_EN |
+                                DP83848_MISR_LINK_INT_EN);
+       }
+
+       return phy_write(phydev, DP83848_MICR, 0x0);
+}
+
+static struct mdio_device_id __maybe_unused dp83848_tbl[] = {
+       { DP83848_PHY_ID, 0xfffffff0 },
+       { }
+};
+MODULE_DEVICE_TABLE(mdio, dp83848_tbl);
+
+static struct phy_driver dp83848_driver[] = {
+       {
+               .phy_id         = DP83848_PHY_ID,
+               .phy_id_mask    = 0xfffffff0,
+               .name           = "TI DP83848",
+               .features       = PHY_BASIC_FEATURES,
+               .flags          = PHY_HAS_INTERRUPT,
+
+               .soft_reset     = genphy_soft_reset,
+               .config_init    = genphy_config_init,
+               .suspend        = genphy_suspend,
+               .resume         = genphy_resume,
+               .config_aneg    = genphy_config_aneg,
+               .read_status    = genphy_read_status,
+
+               /* IRQ related */
+               .ack_interrupt  = dp83848_ack_interrupt,
+               .config_intr    = dp83848_config_intr,
+
+               .driver         = { .owner = THIS_MODULE, },
+       },
+};
+module_phy_driver(dp83848_driver);
+
+MODULE_DESCRIPTION("Texas Instruments DP83848 PHY driver");
+MODULE_AUTHOR("Andrew F. Davis <afd@ti.com");
+MODULE_LICENSE("GPL");