[U-Boot] [PATCH 3/6] Add SGMII support to the tsec
Andy Fleming
afleming at freescale.com
Sun Aug 31 23:33:27 CEST 2008
Adds support for configuring the TBI to talk properly with the SerDes.
Signed-off-by: Andy Fleming <afleming at freescale.com>
---
drivers/net/tsec.c | 74 +++++++++++++++++++++++++++++++++------------------
include/tsec.h | 25 +++++++++++++++++-
2 files changed, 72 insertions(+), 27 deletions(-)
diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c
index d723b74..d5c1da2 100644
--- a/drivers/net/tsec.c
+++ b/drivers/net/tsec.c
@@ -216,61 +216,80 @@ int tsec_init(struct eth_device *dev, bd_t * bd)
return (priv->link ? 0 : -1);
}
-/* Write value to the device's PHY through the registers
- * specified in priv, modifying the register specified in regnum.
- * It will wait for the write to be done (or for a timeout to
- * expire) before exiting
- */
-void write_any_phy_reg(struct tsec_private *priv, uint phyid, uint regnum, uint value)
+/* Writes the given phy's reg with value, using the specified MDIO regs */
+static void tsec_local_mdio_write(volatile tsec_t *phyregs, uint addr,
+ uint reg, uint value)
{
- volatile tsec_t *regbase = priv->phyregs;
int timeout = 1000000;
- regbase->miimadd = (phyid << 8) | regnum;
- regbase->miimcon = value;
+ phyregs->miimadd = (addr << 8) | reg;
+ phyregs->miimcon = value;
asm("sync");
timeout = 1000000;
- while ((regbase->miimind & MIIMIND_BUSY) && timeout--) ;
+ while ((phyregs->miimind & MIIMIND_BUSY) && timeout--) ;
}
-/* #define to provide old write_phy_reg functionality without duplicating code */
-#define write_phy_reg(priv, regnum, value) write_any_phy_reg(priv,priv->phyaddr,regnum,value)
+
+/* Provide the default behavior of writing the PHY of this ethernet device */
+#define write_phy_reg(priv, regnum, value) tsec_local_mdio_write(priv->phyregs,priv->phyaddr,regnum,value)
/* Reads register regnum on the device's PHY through the
- * registers specified in priv. It lowers and raises the read
+ * specified registers. It lowers and raises the read
* command, and waits for the data to become valid (miimind
* notvalid bit cleared), and the bus to cease activity (miimind
* busy bit cleared), and then returns the value
*/
-uint read_any_phy_reg(struct tsec_private *priv, uint phyid, uint regnum)
+uint tsec_local_mdio_read(volatile tsec_t *phyregs, uint phyid, uint regnum)
{
uint value;
- volatile tsec_t *regbase = priv->phyregs;
/* Put the address of the phy, and the register
* number into MIIMADD */
- regbase->miimadd = (phyid << 8) | regnum;
+ phyregs->miimadd = (phyid << 8) | regnum;
/* Clear the command register, and wait */
- regbase->miimcom = 0;
+ phyregs->miimcom = 0;
asm("sync");
/* Initiate a read command, and wait */
- regbase->miimcom = MIIM_READ_COMMAND;
+ phyregs->miimcom = MIIM_READ_COMMAND;
asm("sync");
/* Wait for the the indication that the read is done */
- while ((regbase->miimind & (MIIMIND_NOTVALID | MIIMIND_BUSY))) ;
+ while ((phyregs->miimind & (MIIMIND_NOTVALID | MIIMIND_BUSY))) ;
/* Grab the value read from the PHY */
- value = regbase->miimstat;
+ value = phyregs->miimstat;
return value;
}
/* #define to provide old read_phy_reg functionality without duplicating code */
-#define read_phy_reg(priv,regnum) read_any_phy_reg(priv,priv->phyaddr,regnum)
+#define read_phy_reg(priv,regnum) tsec_local_mdio_read(priv->phyregs,priv->phyaddr,regnum)
+
+#define TBIANA_SETTINGS ( \
+ TBIANA_ASYMMETRIC_PAUSE \
+ | TBIANA_SYMMETRIC_PAUSE \
+ | TBIANA_FULL_DUPLEX \
+ )
+
+#define TBICR_SETTINGS ( \
+ TBICR_PHY_RESET \
+ | TBICR_ANEG_ENABLE \
+ | TBICR_FULL_DUPLEX \
+ | TBICR_SPEED1_SET \
+ )
+/* Configure the TBI for SGMII operation */
+static void tsec_configure_serdes(struct tsec_private *priv)
+{
+ tsec_local_mdio_write(priv->phyregs, CFG_TBIPA_VALUE, TBI_ANA,
+ TBIANA_SETTINGS);
+ tsec_local_mdio_write(priv->phyregs, CFG_TBIPA_VALUE, TBI_TBICON,
+ TBICON_CLK_SELECT);
+ tsec_local_mdio_write(priv->phyregs, CFG_TBIPA_VALUE, TBI_CR,
+ TBICR_SETTINGS);
+}
/* Discover which PHY is attached to the device, and configure it
* properly. If the PHY is not recognized, then return 0
@@ -280,12 +299,12 @@ static int init_phy(struct eth_device *dev)
{
struct tsec_private *priv = (struct tsec_private *)dev->priv;
struct phy_info *curphy;
- volatile tsec_t *regs = (volatile tsec_t *)(TSEC_BASE_ADDR);
+ volatile tsec_t *phyregs = priv->phyregs;
+ volatile tsec_t *regs = priv->regs;
/* Assign a Physical address to the TBI */
regs->tbipa = CFG_TBIPA_VALUE;
- regs = (volatile tsec_t *)(TSEC_BASE_ADDR + TSEC_SIZE);
- regs->tbipa = CFG_TBIPA_VALUE;
+ phyregs->tbipa = CFG_TBIPA_VALUE;
asm("sync");
/* Reset MII (due to new addresses) */
@@ -309,6 +328,9 @@ static int init_phy(struct eth_device *dev)
return 0;
}
+ if (regs->ecntrl & ECNTRL_SGMII_MODE)
+ tsec_configure_serdes(priv);
+
priv->phyinfo = curphy;
phy_run_commands(priv, priv->phyinfo->config);
@@ -1651,7 +1673,7 @@ static int tsec_miiphy_read(char *devname, unsigned char addr,
return -1;
}
- ret = (unsigned short)read_any_phy_reg(priv, addr, reg);
+ ret = (unsigned short)tsec_local_mdio_read(priv->phyregs, addr, reg);
*value = ret;
return 0;
@@ -1673,7 +1695,7 @@ static int tsec_miiphy_write(char *devname, unsigned char addr,
return -1;
}
- write_any_phy_reg(priv, addr, reg, value);
+ tsec_local_mdio_write(priv->phyregs, addr, reg, value);
return 0;
}
diff --git a/include/tsec.h b/include/tsec.h
index fece074..4959bdb 100644
--- a/include/tsec.h
+++ b/include/tsec.h
@@ -60,6 +60,27 @@
#define PHY_AUTONEGOTIATE_TIMEOUT 5000 /* in ms */
+/* TBI register addresses */
+#define TBI_CR 0x00
+#define TBI_SR 0x01
+#define TBI_ANA 0x04
+#define TBI_ANLPBPA 0x05
+#define TBI_ANEX 0x06
+#define TBI_TBICON 0x11
+
+/* TBI MDIO register bit fields*/
+#define TBICON_CLK_SELECT 0x0020
+#define TBIANA_ASYMMETRIC_PAUSE 0x0100
+#define TBIANA_SYMMETRIC_PAUSE 0x0080
+#define TBIANA_HALF_DUPLEX 0x0040
+#define TBIANA_FULL_DUPLEX 0x0020
+#define TBICR_PHY_RESET 0x8000
+#define TBICR_ANEG_ENABLE 0x1000
+#define TBICR_RESTART_ANEG 0x0200
+#define TBICR_FULL_DUPLEX 0x0100
+#define TBICR_SPEED1_SET 0x0040
+
+
/* MAC register bits */
#define MACCFG1_SOFT_RESET 0x80000000
#define MACCFG1_RESET_RX_MC 0x00080000
@@ -533,7 +554,9 @@ typedef struct tsec
/* This flag currently only has
* meaning if we're using the eTSEC */
-#define TSEC_REDUCED (1 << 1)
+#define TSEC_REDUCED (1 << 1)
+
+#define TSEC_SGMII (1 << 2)
struct tsec_private {
volatile tsec_t *regs;
--
1.5.4.GIT
More information about the U-Boot
mailing list