net: phy: add support for Micrel's KSZ9021

Add the gigabit phy KSZ9021.
Also, add function ksz9021_phy_extended_write
/_read for access to the phys extended registers.
The environment variable "disable_giga"
can be used to disable 1000baseTx.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Acked-by: Dirk Behme <dirk.behme@de.bosch.com>

drivers/net/phy/micrel.c

@@ -20,6 +20,9 @@
  * author Andy Fleming
  *
  */
+#include <config.h>
+#include <common.h>
+#include <micrel.h>
 #include <phy.h>
 
 static struct phy_driver KSZ804_driver = {
@@ -42,10 +45,94 @@ static struct phy_driver KS8721_driver = {
 	.shutdown = &genphy_shutdown,
 };
 
+/* ksz9021 PHY Registers */
+#define MII_KSZ9021_EXTENDED_CTRL	0x0b
+#define MII_KSZ9021_EXTENDED_DATAW	0x0c
+#define MII_KSZ9021_EXTENDED_DATAR	0x0d
+#define MII_KSZ9021_PHY_CTL		0x1f
+#define MIIM_KSZ9021_PHYCTL_1000	(1 << 6)
+#define MIIM_KSZ9021_PHYCTL_100		(1 << 5)
+#define MIIM_KSZ9021_PHYCTL_10		(1 << 4)
+#define MIIM_KSZ9021_PHYCTL_DUPLEX	(1 << 3)
+
+#define CTRL1000_PREFER_MASTER		(1 << 10)
+#define CTRL1000_CONFIG_MASTER		(1 << 11)
+#define CTRL1000_MANUAL_CONFIG		(1 << 12)
+
+int ksz9021_phy_extended_write(struct phy_device *phydev, int regnum, u16 val)
+{
+	/* extended registers */
+	phy_write(phydev, MDIO_DEVAD_NONE,
+		MII_KSZ9021_EXTENDED_CTRL, regnum | 0x8000);
+	return phy_write(phydev, MDIO_DEVAD_NONE,
+		MII_KSZ9021_EXTENDED_DATAW, val);
+}
+
+int ksz9021_phy_extended_read(struct phy_device *phydev, int regnum)
+{
+	/* extended registers */
+	phy_write(phydev, MDIO_DEVAD_NONE, MII_KSZ9021_EXTENDED_CTRL, regnum);
+	return phy_read(phydev, MDIO_DEVAD_NONE, MII_KSZ9021_EXTENDED_DATAR);
+}
+
+/* Micrel ksz9021 */
+static int ksz9021_config(struct phy_device *phydev)
+{
+	unsigned ctrl1000 = 0;
+	const unsigned master = CTRL1000_PREFER_MASTER |
+			CTRL1000_CONFIG_MASTER | CTRL1000_MANUAL_CONFIG;
+	unsigned features = phydev->drv->features;
+
+	if (getenv("disable_giga"))
+		features &= ~(SUPPORTED_1000baseT_Half |
+				SUPPORTED_1000baseT_Full);
+	/* force master mode for 1000BaseT due to chip errata */
+	if (features & SUPPORTED_1000baseT_Half)
+		ctrl1000 |= ADVERTISE_1000HALF | master;
+	if (features & SUPPORTED_1000baseT_Full)
+		ctrl1000 |= ADVERTISE_1000FULL | master;
+	phydev->advertising = phydev->supported = features;
+	phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, ctrl1000);
+	genphy_config_aneg(phydev);
+	genphy_restart_aneg(phydev);
+	return 0;
+}
+
+static int ksz9021_startup(struct phy_device *phydev)
+{
+	unsigned phy_ctl;
+	genphy_update_link(phydev);
+	phy_ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_KSZ9021_PHY_CTL);
+
+	if (phy_ctl & MIIM_KSZ9021_PHYCTL_DUPLEX)
+		phydev->duplex = DUPLEX_FULL;
+	else
+		phydev->duplex = DUPLEX_HALF;
+
+	if (phy_ctl & MIIM_KSZ9021_PHYCTL_1000)
+		phydev->speed = SPEED_1000;
+	else if (phy_ctl & MIIM_KSZ9021_PHYCTL_100)
+		phydev->speed = SPEED_100;
+	else if (phy_ctl & MIIM_KSZ9021_PHYCTL_10)
+		phydev->speed = SPEED_10;
+	return 0;
+}
+
+static struct phy_driver ksz9021_driver = {
+	.name = "Micrel ksz9021",
+	.uid  = 0x221610,
+	.mask = 0xfffff0,
+	.features = PHY_GBIT_FEATURES,
+	.config = &ksz9021_config,
+	.startup = &ksz9021_startup,
+	.shutdown = &genphy_shutdown,
+};
+
 int phy_micrel_init(void)
 {
 	phy_register(&KSZ804_driver);
 	phy_register(&KS8721_driver);
+	phy_register(&ksz9021_driver);
 
 	return 0;
 }

include/micrel.h

@@ -0,0 +1,16 @@
+#ifndef _MICREL_H
+
+#define MII_KSZ9021_EXT_COMMON_CTRL		0x100
+#define MII_KSZ9021_EXT_STRAP_STATUS		0x101
+#define MII_KSZ9021_EXT_OP_STRAP_OVERRIDE	0x102
+#define MII_KSZ9021_EXT_OP_STRAP_STATUS		0x103
+#define MII_KSZ9021_EXT_RGMII_CLOCK_SKEW	0x104
+#define MII_KSZ9021_EXT_RGMII_RX_DATA_SKEW	0x105
+#define MII_KSZ9021_EXT_RGMII_TX_DATA_SKEW	0x106
+#define MII_KSZ9021_EXT_ANALOG_TEST		0x107
+
+struct phy_device;
+int ksz9021_phy_extended_write(struct phy_device *phydev, int regnum, u16 val);
+int ksz9021_phy_extended_read(struct phy_device *phydev, int regnum);
+
+#endif

include/phy.h

@@ -207,6 +207,7 @@ int phy_config(struct phy_device *phydev);
 int phy_shutdown(struct phy_device *phydev);
 int phy_register(struct phy_driver *drv);
 int genphy_config_aneg(struct phy_device *phydev);
+int genphy_restart_aneg(struct phy_device *phydev);
 int genphy_update_link(struct phy_device *phydev);
 int genphy_config(struct phy_device *phydev);
 int genphy_startup(struct phy_device *phydev);