diff mbox

[U-Boot,12/14] PHY: add some Broadcom phy support

Message ID 1296103972-2696-13-git-send-email-Mingkai.hu@freescale.com
State Superseded, archived
Headers show

Commit Message

Mingkai Hu Jan. 27, 2011, 4:52 a.m. UTC
Port from tsec.c file to add support for bcm5461, bcm5464, bcm5482s.

Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
---
 drivers/net/fsl_phy.c |  245 +++++++++++++++++++++++++++++++++++++++++++++++++
 drivers/net/fsl_phy.h |   22 +++++
 2 files changed, 267 insertions(+), 0 deletions(-)
diff mbox

Patch

diff --git a/drivers/net/fsl_phy.c b/drivers/net/fsl_phy.c
index a6ec614..7c22666 100644
--- a/drivers/net/fsl_phy.c
+++ b/drivers/net/fsl_phy.c
@@ -21,6 +21,7 @@ 
 #include <common.h>
 #include <asm/io.h>
 #include <asm/errno.h>
+#include <tsec.h>
 
 #include "fsl_phy.h"
 
@@ -242,6 +243,220 @@  static int genphy_shutdown(struct mii_info *phydev)
 	return 0;
 }
 
+/* Broadcom BCM5461S */
+static int bcm5461_config(struct mii_info *mii_info)
+{
+	unsigned int reg;
+
+	/* reset the PHY */
+	reg = tsec_phy_read(mii_info, 0, MII_BMCR);
+	reg |= BMCR_RESET;
+	tsec_phy_write(mii_info, 0, MII_BMCR, reg);
+
+	tsec_phy_write(mii_info, 0, MII_CTRL1000, MII_CTRL1000_INIT);
+	tsec_phy_write(mii_info, 0, MII_ADVERTISE, MII_ADVERTISE_INIT);
+
+	/* reset the PHY */
+	reg = tsec_phy_read(mii_info, 0, MII_BMCR);
+	reg |= BMCR_RESET;
+	tsec_phy_write(mii_info, 0, MII_BMCR, reg);
+
+	tsec_phy_write(mii_info, 0, MII_BMCR, MII_BMCR_INIT);
+
+	return 0;
+}
+
+static int bcm54xx_parse_status(struct mii_info *mii_info)
+{
+	unsigned int mii_reg;
+
+	mii_reg = tsec_phy_read(mii_info, 0, MIIM_BCM54xx_AUXSTATUS);
+
+	switch ((mii_reg & MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK) >>
+			MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT) {
+		case 1:
+		mii_info->duplex = DUPLEX_HALF;
+		mii_info->speed = SPEED_10;
+		break;
+		case 2:
+		mii_info->duplex = DUPLEX_FULL;
+		mii_info->speed = SPEED_10;
+		break;
+		case 3:
+		mii_info->duplex = DUPLEX_HALF;
+		mii_info->speed = SPEED_100;
+		break;
+		case 5:
+		mii_info->duplex = DUPLEX_FULL;
+		mii_info->speed = SPEED_100;
+		break;
+		case 6:
+		mii_info->duplex = DUPLEX_HALF;
+		mii_info->speed = SPEED_1000;
+		break;
+		case 7:
+		mii_info->duplex = DUPLEX_FULL;
+		mii_info->speed = SPEED_1000;
+		break;
+		default:
+		printf("Auto-neg error, defaulting to 10BT/HD\n");
+		mii_info->duplex = DUPLEX_HALF;
+		mii_info->speed = SPEED_10;
+		break;
+	}
+
+	return 0;
+}
+
+static int bcm54xx_startup(struct mii_info *mii_info)
+{
+	/* Read the Status (2x to make sure link is right) */
+	genphy_update_link(mii_info);
+	bcm54xx_parse_status(mii_info);
+
+	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 mii_info *mii_info, u32 reg)
+{
+	return (tsec_phy_read(mii_info, 0, reg) & 0x8FFF) | 0x8010;
+}
+
+static int bcm5482_config(struct mii_info *mii_info)
+{
+	unsigned int reg;
+
+	/* reset the PHY */
+	reg = tsec_phy_read(mii_info, 0, MII_BMCR);
+	reg |= BMCR_RESET;
+	tsec_phy_write(mii_info, 0, MII_BMCR, reg);
+
+	/* Setup read from auxilary control shadow register 7 */
+	tsec_phy_write(mii_info, 0, MIIM_BCM54xx_AUXCNTL,
+			MIIM_BCM54xx_AUXCNTL_ENCODE(7));
+	/* Read Misc Control register and or in Ethernet@Wirespeed */
+	reg = bcm5482_read_wirespeed(mii_info, MIIM_BCM54xx_AUXCNTL);
+	tsec_phy_write(mii_info, 0, MIIM_BCM54xx_AUXCNTL, reg);
+	tsec_phy_write(mii_info, 0, MII_BMCR, MII_BMCR_INIT);
+	/* Initial config/enable of secondary SerDes interface */
+	tsec_phy_write(mii_info, 0, MIIM_BCM54XX_SHD,
+			MIIM_BCM54XX_SHD_WR_ENCODE(0x14, 0xf));
+	/* Write intial value to secondary SerDes Contol */
+	tsec_phy_write(mii_info, 0, MIIM_BCM54XX_EXP_SEL,
+			MIIM_BCM54XX_EXP_SEL_SSD | 0);
+	tsec_phy_write(mii_info, 0, MIIM_BCM54XX_EXP_DATA, MII_BMCR_RESTART);
+	/* Enable copper/fiber auto-detect */
+	tsec_phy_write(mii_info, 0, MIIM_BCM54XX_SHD,
+			MIIM_BCM54XX_SHD_WR_ENCODE(0x1e, 0x201));
+
+	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 mii_info *mii_info)
+{
+	u16 val;
+	int serdes = 0;
+
+	tsec_phy_write(mii_info, 0, MIIM_BCM54XX_EXP_SEL,
+			MIIM_BCM54XX_EXP_SEL_ER | 0x42);
+	val = tsec_phy_read(mii_info, 0, 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 mii_info *mii_info)
+{
+	u16 val;
+	int i = 0;
+
+	/* Wait 1s for link - Clause 37 autonegotiation happens very fast */
+	while (1) {
+		tsec_phy_write(mii_info, 0, MIIM_BCM54XX_EXP_SEL,
+				MIIM_BCM54XX_EXP_SEL_ER | 0x42);
+		val = tsec_phy_read(mii_info, 0, MIIM_BCM54XX_EXP_DATA);
+
+		if (val & 0x8000)
+			break;
+
+		if (i++ > 1000) {
+			mii_info->link = 0;
+			return 1;
+		}
+
+		udelay(1000);	/* 1 ms */
+	}
+
+	mii_info->link = 1;
+	switch ((val >> 13) & 0x3) {
+	case (0x00):
+		mii_info->speed = 10;
+		break;
+	case (0x01):
+		mii_info->speed = 100;
+		break;
+	case (0x02):
+		mii_info->speed = 1000;
+		break;
+	}
+
+	mii_info->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 mii_info *mii_info)
+{
+	if (bcm5482_is_serdes(mii_info)) {
+		bcm5482_parse_serdes_sr(mii_info);
+		mii_info->flags |= TSEC_FIBER;
+	} else {
+		/* Wait for auto-negotiation to complete or fail */
+		genphy_update_link(mii_info);
+		/* Parse BCM54xx copper aux status register */
+		bcm54xx_parse_status(mii_info);
+	}
+
+	return 0;
+}
+
 /* Vitesse VSC8211 */
 static int vsc8211_config(struct mii_info *mii_info)
 {
@@ -359,6 +574,33 @@  int vsc8601_config(struct mii_info *mii_info)
 	return 0;
 }
 
+static struct phy_info phy_info_BCM5461S = {
+	"Broadcom BCM5461S",
+	0x2060c0,
+	0xfffff0,
+	&bcm5461_config,
+	&bcm54xx_startup,
+	&genphy_shutdown,
+};
+
+static struct phy_info phy_info_BCM5464S = {
+	"Broadcom BCM5464S",
+	0x2060b0,
+	0xfffff0,
+	&bcm5461_config,
+	&bcm54xx_startup,
+	&genphy_shutdown,
+};
+
+static struct phy_info phy_info_BCM5482S = {
+	"Broadcom BCM5482S",
+	0x143bcb0,
+	0xffffff0,
+	&bcm5482_config,
+	&bcm5482_startup,
+	&genphy_shutdown,
+};
+
 static struct phy_info phy_info_VSC8211 = {
 	"Vitesse VSC8211",
 	0xfc4b0,
@@ -423,6 +665,9 @@  static struct phy_info phy_info_generic = {
 };
 
 static struct phy_info *phy_info[] = {
+	&phy_info_BCM5461S,
+	&phy_info_BCM5464S,
+	&phy_info_BCM5482S,
 	&phy_info_VSC8211,
 	&phy_info_VSC8221,
 	&phy_info_VSC8244,
diff --git a/drivers/net/fsl_phy.h b/drivers/net/fsl_phy.h
index d18cc58..340527c 100644
--- a/drivers/net/fsl_phy.h
+++ b/drivers/net/fsl_phy.h
@@ -38,7 +38,9 @@ 
 #define PHY_EXT_PAGE_ACCESS	0x1f
 
 #define MII_BMCR_INIT           0x00001140
+#define MII_BMCR_RESTART	0x00001340
 #define MII_ADVERTISE_INIT	0x1e1
+#define MII_CTRL1000_INIT	0xe00
 
 /* MII Management Configuration Register */
 #define MIIMCFG_RESET_MGMT          0x80000000
@@ -100,6 +102,26 @@ 
 
 #define PHY_AUTONEGOTIATE_TIMEOUT	5000 /* in ms */
 
+/* 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 */
+
 /* Cicada Auxiliary Control/Status Register */
 #define MIIM_CIS8201_AUX_CONSTAT	0x1c
 #define MIIM_CIS8201_AUXCONSTAT_INIT	0x0004