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authorAntony Pavlov <antonynpavlov@gmail.com>2014-01-13 12:39:59 +0400
committerSascha Hauer <s.hauer@pengutronix.de>2014-01-20 10:54:24 +0100
commitcec6fd5d85511bd7364d8472c28f7136a3196edb (patch)
tree51178c1062409ed90720f64ab15b9b29e2d27a10
parentd9a08d8bc5da4f06a2c96f4a4c4591c01d5b5d44 (diff)
downloadbarebox-cec6fd5d85511bd7364d8472c28f7136a3196edb.tar.gz
barebox-cec6fd5d85511bd7364d8472c28f7136a3196edb.tar.xz
net/phy: add driver for National Semiconductor DP83865 PHY
Based on Linux kernel 3.12 driver. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r--drivers/net/phy/Kconfig5
-rw-r--r--drivers/net/phy/Makefile1
-rw-r--r--drivers/net/phy/national.c95
3 files changed, 101 insertions, 0 deletions
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 7ebdaa0c01..260774e265 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -23,6 +23,11 @@ config MICREL_PHY
---help---
Supports the KSZ9021, VSC8201, KS8001 PHYs.
+config NATIONAL_PHY
+ bool "Driver for National Semiconductor PHYs"
+ ---help---
+ Currently supports the DP83865 PHY.
+
config SMSC_PHY
bool "Drivers for SMSC PHYs"
---help---
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index 451573ed83..a00cc76efe 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -2,4 +2,5 @@ obj-y += phy.o mdio_bus.o
obj-$(CONFIG_AT803X_PHY) += at803x.o
obj-$(CONFIG_LXT_PHY) += lxt.o
obj-$(CONFIG_MICREL_PHY) += micrel.o
+obj-$(CONFIG_NATIONAL_PHY) += national.o
obj-$(CONFIG_SMSC_PHY) += smsc.o
diff --git a/drivers/net/phy/national.c b/drivers/net/phy/national.c
new file mode 100644
index 0000000000..e46d587cd4
--- /dev/null
+++ b/drivers/net/phy/national.c
@@ -0,0 +1,95 @@
+/*
+ * drivers/net/phy/national.c
+ *
+ * Driver for National Semiconductor PHYs
+ *
+ * based on Stuart Menefy's linux national.c driver
+ *
+ * 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.
+ */
+
+#include <common.h>
+#include <init.h>
+#include <linux/phy.h>
+
+/* Advanced proprietary configuration */
+#define NS_EXP_MEM_CTL 0x16
+#define NS_EXP_MEM_DATA 0x1d
+#define NS_EXP_MEM_ADD 0x1e
+
+#define LED_CTRL_REG 0x13
+#define AN_FALLBACK_AN 0x0001
+#define AN_FALLBACK_CRC 0x0002
+#define AN_FALLBACK_IE 0x0004
+#define ALL_FALLBACK_ON (AN_FALLBACK_AN | AN_FALLBACK_CRC | AN_FALLBACK_IE)
+
+enum hdx_loopback {
+ hdx_loopback_on = 0,
+ hdx_loopback_off = 1,
+};
+
+static u8 ns_exp_read(struct phy_device *phydev, u16 reg)
+{
+ phy_write(phydev, NS_EXP_MEM_ADD, reg);
+ return phy_read(phydev, NS_EXP_MEM_DATA);
+}
+
+static void ns_exp_write(struct phy_device *phydev, u16 reg, u8 data)
+{
+ phy_write(phydev, NS_EXP_MEM_ADD, reg);
+ phy_write(phydev, NS_EXP_MEM_DATA, data);
+}
+
+static void ns_giga_speed_fallback(struct phy_device *phydev, int mode)
+{
+ int bmcr = phy_read(phydev, MII_BMCR);
+
+ phy_write(phydev, MII_BMCR, (bmcr | BMCR_PDOWN));
+
+ /* Enable 8 bit expended memory read/write (no auto increment) */
+ phy_write(phydev, NS_EXP_MEM_CTL, 0);
+ phy_write(phydev, NS_EXP_MEM_ADD, 0x1C0);
+ phy_write(phydev, NS_EXP_MEM_DATA, 0x0008);
+ phy_write(phydev, MII_BMCR, (bmcr & ~BMCR_PDOWN));
+ phy_write(phydev, LED_CTRL_REG, mode);
+}
+
+static void ns_10_base_t_hdx_loopack(struct phy_device *phydev, int disable)
+{
+ if (disable)
+ ns_exp_write(phydev, 0x1c0, ns_exp_read(phydev, 0x1c0) | 1);
+ else
+ ns_exp_write(phydev, 0x1c0,
+ ns_exp_read(phydev, 0x1c0) & 0xfffe);
+
+ pr_debug("10BASE-T HDX loopback %s\n",
+ (ns_exp_read(phydev, 0x1c0) & 0x0001) ? "off" : "on");
+}
+
+static int ns_config_init(struct phy_device *phydev)
+{
+ ns_giga_speed_fallback(phydev, ALL_FALLBACK_ON);
+ /* In the latest MAC or switches design, the 10 Mbps loopback
+ is desired to be turned off. */
+ ns_10_base_t_hdx_loopack(phydev, hdx_loopback_off);
+
+ return 0;
+}
+
+static struct phy_driver dp83865_driver = {
+ .phy_id = 0x20005c70,
+ .phy_id_mask = 0xfffffff0,
+ .drv.name = "NatSemi DP83865",
+ .features = PHY_GBIT_FEATURES |
+ SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+ .config_init = ns_config_init,
+};
+
+static int ns_phy_init(void)
+{
+ return phy_driver_register(&dp83865_driver);
+}
+fs_initcall(ns_phy_init);