Merge branch 'phylib' of git://git.denx.de/u-boot-mmc

1 files changed, 288 insertions, 0 deletions

diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c
new file mode 100644
index 0000000..427ac60
--- /dev/null
+++ b/drivers/net/phy/broadcom.c
@@ -0,0 +1,288 @@
+/*
+ * Broadcom PHY drivers
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * Copyright 2010-2011 Freescale Semiconductor, Inc.
+ * author Andy Fleming
+ *
+ */
+#include <config.h>
+#include <common.h>
+#include <phy.h>
+
+/* Broadcom BCM54xx -- taken from linux sungem_phy */
+#define MIIM_BCM54xx_AUXCNTL			0x18
+#define MIIM_BCM54xx_AUXCNTL_ENCODE(val) (((val & 0x7) << 12)|(val & 0x7))
+#define MIIM_BCM54xx_AUXSTATUS			0x19
+#define MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK	0x0700
+#define MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT	8
+
+#define MIIM_BCM54XX_SHD			0x1c
+#define MIIM_BCM54XX_SHD_WRITE			0x8000
+#define MIIM_BCM54XX_SHD_VAL(x)			((x & 0x1f) << 10)
+#define MIIM_BCM54XX_SHD_DATA(x)		((x & 0x3ff) << 0)
+#define MIIM_BCM54XX_SHD_WR_ENCODE(val, data)	\
+	(MIIM_BCM54XX_SHD_WRITE | MIIM_BCM54XX_SHD_VAL(val) | \
+	 MIIM_BCM54XX_SHD_DATA(data))
+
+#define MIIM_BCM54XX_EXP_DATA		0x15	/* Expansion register data */
+#define MIIM_BCM54XX_EXP_SEL		0x17	/* Expansion register select */
+#define MIIM_BCM54XX_EXP_SEL_SSD	0x0e00	/* Secondary SerDes select */
+#define MIIM_BCM54XX_EXP_SEL_ER		0x0f00	/* Expansion register select */
+
+/* Broadcom BCM5461S */
+static int bcm5461_config(struct phy_device *phydev)
+{
+	genphy_config_aneg(phydev);
+
+	phy_reset(phydev);
+
+	return 0;
+}
+
+static int bcm54xx_parse_status(struct phy_device *phydev)
+{
+	unsigned int mii_reg;
+
+	mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXSTATUS);
+
+	switch ((mii_reg & MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK) >>
+			MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT) {
+	case 1:
+		phydev->duplex = DUPLEX_HALF;
+		phydev->speed = SPEED_10;
+		break;
+	case 2:
+		phydev->duplex = DUPLEX_FULL;
+		phydev->speed = SPEED_10;
+		break;
+	case 3:
+		phydev->duplex = DUPLEX_HALF;
+		phydev->speed = SPEED_100;
+		break;
+	case 5:
+		phydev->duplex = DUPLEX_FULL;
+		phydev->speed = SPEED_100;
+		break;
+	case 6:
+		phydev->duplex = DUPLEX_HALF;
+		phydev->speed = SPEED_1000;
+		break;
+	case 7:
+		phydev->duplex = DUPLEX_FULL;
+		phydev->speed = SPEED_1000;
+		break;
+	default:
+		printf("Auto-neg error, defaulting to 10BT/HD\n");
+		phydev->duplex = DUPLEX_HALF;
+		phydev->speed = SPEED_10;
+		break;
+	}
+
+	return 0;
+}
+
+static int bcm54xx_startup(struct phy_device *phydev)
+{
+	/* Read the Status (2x to make sure link is right) */
+	genphy_update_link(phydev);
+	bcm54xx_parse_status(phydev);
+
+	return 0;
+}
+
+/* Broadcom BCM5482S */
+/*
+ * "Ethernet@Wirespeed" needs to be enabled to achieve link in certain
+ * circumstances.  eg a gigabit TSEC connected to a gigabit switch with
+ * a 4-wire ethernet cable.  Both ends advertise gigabit, but can't
+ * link.  "Ethernet@Wirespeed" reduces advertised speed until link
+ * can be achieved.
+ */
+static u32 bcm5482_read_wirespeed(struct phy_device *phydev, u32 reg)
+{
+	return (phy_read(phydev, MDIO_DEVAD_NONE, reg) & 0x8FFF) | 0x8010;
+}
+
+static int bcm5482_config(struct phy_device *phydev)
+{
+	unsigned int reg;
+
+	/* reset the PHY */
+	reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
+	reg |= BMCR_RESET;
+	phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, reg);
+
+	/* Setup read from auxilary control shadow register 7 */
+	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL,
+			MIIM_BCM54xx_AUXCNTL_ENCODE(7));
+	/* Read Misc Control register and or in Ethernet@Wirespeed */
+	reg = bcm5482_read_wirespeed(phydev, MIIM_BCM54xx_AUXCNTL);
+	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, reg);
+
+	/* Initial config/enable of secondary SerDes interface */
+	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
+			MIIM_BCM54XX_SHD_WR_ENCODE(0x14, 0xf));
+	/* Write intial value to secondary SerDes Contol */
+	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
+			MIIM_BCM54XX_EXP_SEL_SSD | 0);
+	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA,
+			BMCR_ANRESTART);
+	/* Enable copper/fiber auto-detect */
+	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
+			MIIM_BCM54XX_SHD_WR_ENCODE(0x1e, 0x201));
+
+	genphy_config_aneg(phydev);
+
+	return 0;
+}
+
+/*
+ * Find out if PHY is in copper or serdes mode by looking at Expansion Reg
+ * 0x42 - "Operating Mode Status Register"
+ */
+static int bcm5482_is_serdes(struct phy_device *phydev)
+{
+	u16 val;
+	int serdes = 0;
+
+	phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
+			MIIM_BCM54XX_EXP_SEL_ER | 0x42);
+	val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA);
+
+	switch (val & 0x1f) {
+	case 0x0d:	/* RGMII-to-100Base-FX */
+	case 0x0e:	/* RGMII-to-SGMII */
+	case 0x0f:	/* RGMII-to-SerDes */
+	case 0x12:	/* SGMII-to-SerDes */
+	case 0x13:	/* SGMII-to-100Base-FX */
+	case 0x16:	/* SerDes-to-Serdes */
+		serdes = 1;
+		break;
+	case 0x6:	/* RGMII-to-Copper */
+	case 0x14:	/* SGMII-to-Copper */
+	case 0x17:	/* SerDes-to-Copper */
+		break;
+	default:
+		printf("ERROR, invalid PHY mode (0x%x\n)", val);
+		break;
+	}
+
+	return serdes;
+}
+
+/*
+ * Determine SerDes link speed and duplex from Expansion reg 0x42 "Operating
+ * Mode Status Register"
+ */
+static u32 bcm5482_parse_serdes_sr(struct phy_device *phydev)
+{
+	u16 val;
+	int i = 0;
+
+	/* Wait 1s for link - Clause 37 autonegotiation happens very fast */
+	while (1) {
+		phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
+				MIIM_BCM54XX_EXP_SEL_ER | 0x42);
+		val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA);
+
+		if (val & 0x8000)
+			break;
+
+		if (i++ > 1000) {
+			phydev->link = 0;
+			return 1;
+		}
+
+		udelay(1000);	/* 1 ms */
+	}
+
+	phydev->link = 1;
+	switch ((val >> 13) & 0x3) {
+	case (0x00):
+		phydev->speed = 10;
+		break;
+	case (0x01):
+		phydev->speed = 100;
+		break;
+	case (0x02):
+		phydev->speed = 1000;
+		break;
+	}
+
+	phydev->duplex = (val & 0x1000) == 0x1000;
+
+	return 0;
+}
+
+/*
+ * Figure out if BCM5482 is in serdes or copper mode and determine link
+ * configuration accordingly
+ */
+static int bcm5482_startup(struct phy_device *phydev)
+{
+	if (bcm5482_is_serdes(phydev)) {
+		bcm5482_parse_serdes_sr(phydev);
+		phydev->port = PORT_FIBRE;
+	} else {
+		/* Wait for auto-negotiation to complete or fail */
+		genphy_update_link(phydev);
+		/* Parse BCM54xx copper aux status register */
+		bcm54xx_parse_status(phydev);
+	}
+
+	return 0;
+}
+
+static struct phy_driver BCM5461S_driver = {
+	.name = "Broadcom BCM5461S",
+	.uid = 0x2060c0,
+	.mask = 0xfffff0,
+	.features = PHY_GBIT_FEATURES,
+	.config = &bcm5461_config,
+	.startup = &bcm54xx_startup,
+	.shutdown = &genphy_shutdown,
+};
+
+static struct phy_driver BCM5464S_driver = {
+	.name = "Broadcom BCM5464S",
+	.uid = 0x2060b0,
+	.mask = 0xfffff0,
+	.features = PHY_GBIT_FEATURES,
+	.config = &bcm5461_config,
+	.startup = &bcm54xx_startup,
+	.shutdown = &genphy_shutdown,
+};
+
+static struct phy_driver BCM5482S_driver = {
+	.name = "Broadcom BCM5482S",
+	.uid = 0x143bcb0,
+	.mask = 0xffffff0,
+	.features = PHY_GBIT_FEATURES,
+	.config = &bcm5482_config,
+	.startup = &bcm5482_startup,
+	.shutdown = &genphy_shutdown,
+};
+
+int phy_broadcom_init(void)
+{
+	phy_register(&BCM5482S_driver);
+	phy_register(&BCM5464S_driver);
+	phy_register(&BCM5461S_driver);
+
+	return 0;
+}