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linux/drivers/net/phy/broadcom.c
Nate Case cd9af3dac6 PHYLIB: Add 1000Base-X support for Broadcom bcm5482 
Configure the BCM5482S secondary SerDes for 1000Base-X mode when the
appropriate dev_flags are passed in to phy_connect().  This is
needed when the PHY is used for fiber and backplane connections.

Signed-off-by: Nate Case <ncase@xes-inc.com>
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-22 06:34:31 -04:00

468 lines
13 KiB
C
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/*
* drivers/net/phy/broadcom.c
*
* Broadcom BCM5411, BCM5421 and BCM5461 Gigabit Ethernet
* transceivers.
*
* Copyright (c) 2006 Maciej W. Rozycki
*
* Inspired by code written by Amy Fong.
*
* 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 <linux/module.h>
#include <linux/phy.h>
#define MII_BCM54XX_ECR 0x10 /* BCM54xx extended control register */
#define MII_BCM54XX_ECR_IM 0x1000 /* Interrupt mask */
#define MII_BCM54XX_ECR_IF 0x0800 /* Interrupt force */
#define MII_BCM54XX_ESR 0x11 /* BCM54xx extended status register */
#define MII_BCM54XX_ESR_IS 0x1000 /* Interrupt status */
#define MII_BCM54XX_EXP_DATA 0x15 /* Expansion register data */
#define MII_BCM54XX_EXP_SEL 0x17 /* Expansion register select */
#define MII_BCM54XX_EXP_SEL_SSD 0x0e00 /* Secondary SerDes select */
#define MII_BCM54XX_EXP_SEL_ER 0x0f00 /* Expansion register select */
#define MII_BCM54XX_AUX_CTL 0x18 /* Auxiliary control register */
#define MII_BCM54XX_ISR 0x1a /* BCM54xx interrupt status register */
#define MII_BCM54XX_IMR 0x1b /* BCM54xx interrupt mask register */
#define MII_BCM54XX_INT_CRCERR 0x0001 /* CRC error */
#define MII_BCM54XX_INT_LINK 0x0002 /* Link status changed */
#define MII_BCM54XX_INT_SPEED 0x0004 /* Link speed change */
#define MII_BCM54XX_INT_DUPLEX 0x0008 /* Duplex mode changed */
#define MII_BCM54XX_INT_LRS 0x0010 /* Local receiver status changed */
#define MII_BCM54XX_INT_RRS 0x0020 /* Remote receiver status changed */
#define MII_BCM54XX_INT_SSERR 0x0040 /* Scrambler synchronization error */
#define MII_BCM54XX_INT_UHCD 0x0080 /* Unsupported HCD negotiated */
#define MII_BCM54XX_INT_NHCD 0x0100 /* No HCD */
#define MII_BCM54XX_INT_NHCDL 0x0200 /* No HCD link */
#define MII_BCM54XX_INT_ANPR 0x0400 /* Auto-negotiation page received */
#define MII_BCM54XX_INT_LC 0x0800 /* All counters below 128 */
#define MII_BCM54XX_INT_HC 0x1000 /* Counter above 32768 */
#define MII_BCM54XX_INT_MDIX 0x2000 /* MDIX status change */
#define MII_BCM54XX_INT_PSERR 0x4000 /* Pair swap error */
#define MII_BCM54XX_SHD 0x1c /* 0x1c shadow registers */
#define MII_BCM54XX_SHD_WRITE 0x8000
#define MII_BCM54XX_SHD_VAL(x) ((x & 0x1f) << 10)
#define MII_BCM54XX_SHD_DATA(x) ((x & 0x3ff) << 0)
/*
* Broadcom LED source encodings. These are used in BCM5461, BCM5481,
* BCM5482, and possibly some others.
*/
#define BCM_LED_SRC_LINKSPD1 0x0
#define BCM_LED_SRC_LINKSPD2 0x1
#define BCM_LED_SRC_XMITLED 0x2
#define BCM_LED_SRC_ACTIVITYLED 0x3
#define BCM_LED_SRC_FDXLED 0x4
#define BCM_LED_SRC_SLAVE 0x5
#define BCM_LED_SRC_INTR 0x6
#define BCM_LED_SRC_QUALITY 0x7
#define BCM_LED_SRC_RCVLED 0x8
#define BCM_LED_SRC_MULTICOLOR1 0xa
#define BCM_LED_SRC_OPENSHORT 0xb
#define BCM_LED_SRC_OFF 0xe /* Tied high */
#define BCM_LED_SRC_ON 0xf /* Tied low */
/*
* BCM5482: Shadow registers
* Shadow values go into bits [14:10] of register 0x1c to select a shadow
* register to access.
*/
#define BCM5482_SHD_LEDS1 0x0d /* 01101: LED Selector 1 */
/* LED3 / ~LINKSPD[2] selector */
#define BCM5482_SHD_LEDS1_LED3(src) ((src & 0xf) << 4)
/* LED1 / ~LINKSPD[1] selector */
#define BCM5482_SHD_LEDS1_LED1(src) ((src & 0xf) << 0)
#define BCM5482_SHD_SSD 0x14 /* 10100: Secondary SerDes control */
#define BCM5482_SHD_SSD_LEDM 0x0008 /* SSD LED Mode enable */
#define BCM5482_SHD_SSD_EN 0x0001 /* SSD enable */
#define BCM5482_SHD_MODE 0x1f /* 11111: Mode Control Register */
#define BCM5482_SHD_MODE_1000BX 0x0001 /* Enable 1000BASE-X registers */
/*
* BCM5482: Secondary SerDes registers
*/
#define BCM5482_SSD_1000BX_CTL 0x00 /* 1000BASE-X Control */
#define BCM5482_SSD_1000BX_CTL_PWRDOWN 0x0800 /* Power-down SSD */
#define BCM5482_SSD_SGMII_SLAVE 0x15 /* SGMII Slave Register */
#define BCM5482_SSD_SGMII_SLAVE_EN 0x0002 /* Slave mode enable */
#define BCM5482_SSD_SGMII_SLAVE_AD 0x0001 /* Slave auto-detection */
/*
* Device flags for PHYs that can be configured for different operating
* modes.
*/
#define PHY_BCM_FLAGS_VALID 0x80000000
#define PHY_BCM_FLAGS_INTF_XAUI 0x00000020
#define PHY_BCM_FLAGS_INTF_SGMII 0x00000010
#define PHY_BCM_FLAGS_MODE_1000BX 0x00000002
#define PHY_BCM_FLAGS_MODE_COPPER 0x00000001
MODULE_DESCRIPTION("Broadcom PHY driver");
MODULE_AUTHOR("Maciej W. Rozycki");
MODULE_LICENSE("GPL");
/*
* Indirect register access functions for the 1000BASE-T/100BASE-TX/10BASE-T
* 0x1c shadow registers.
*/
static int bcm54xx_shadow_read(struct phy_device *phydev, u16 shadow)
{
phy_write(phydev, MII_BCM54XX_SHD, MII_BCM54XX_SHD_VAL(shadow));
return MII_BCM54XX_SHD_DATA(phy_read(phydev, MII_BCM54XX_SHD));
}
static int bcm54xx_shadow_write(struct phy_device *phydev, u16 shadow, u16 val)
{
return phy_write(phydev, MII_BCM54XX_SHD,
MII_BCM54XX_SHD_WRITE |
MII_BCM54XX_SHD_VAL(shadow) |
MII_BCM54XX_SHD_DATA(val));
}
/*
* Indirect register access functions for the Expansion Registers
* and Secondary SerDes registers (when sec_serdes=1).
*/
static int bcm54xx_exp_read(struct phy_device *phydev,
int sec_serdes, u8 regnum)
{
int val;
phy_write(phydev, MII_BCM54XX_EXP_SEL,
(sec_serdes ? MII_BCM54XX_EXP_SEL_SSD :
MII_BCM54XX_EXP_SEL_ER) |
regnum);
val = phy_read(phydev, MII_BCM54XX_EXP_DATA);
phy_write(phydev, MII_BCM54XX_EXP_SEL, regnum);
return val;
}
static int bcm54xx_exp_write(struct phy_device *phydev,
int sec_serdes, u8 regnum, u16 val)
{
int ret;
phy_write(phydev, MII_BCM54XX_EXP_SEL,
(sec_serdes ? MII_BCM54XX_EXP_SEL_SSD :
MII_BCM54XX_EXP_SEL_ER) |
regnum);
ret = phy_write(phydev, MII_BCM54XX_EXP_DATA, val);
phy_write(phydev, MII_BCM54XX_EXP_SEL, regnum);
return ret;
}
static int bcm54xx_config_init(struct phy_device *phydev)
{
int reg, err;
reg = phy_read(phydev, MII_BCM54XX_ECR);
if (reg < 0)
return reg;
/* Mask interrupts globally. */
reg |= MII_BCM54XX_ECR_IM;
err = phy_write(phydev, MII_BCM54XX_ECR, reg);
if (err < 0)
return err;
/* Unmask events we are interested in. */
reg = ~(MII_BCM54XX_INT_DUPLEX |
MII_BCM54XX_INT_SPEED |
MII_BCM54XX_INT_LINK);
err = phy_write(phydev, MII_BCM54XX_IMR, reg);
if (err < 0)
return err;
return 0;
}
static int bcm5482_config_init(struct phy_device *phydev)
{
int err, reg;
err = bcm54xx_config_init(phydev);
if (phydev->dev_flags & PHY_BCM_FLAGS_MODE_1000BX) {
/*
* Enable secondary SerDes and its use as an LED source
*/
reg = bcm54xx_shadow_read(phydev, BCM5482_SHD_SSD);
bcm54xx_shadow_write(phydev, BCM5482_SHD_SSD,
reg |
BCM5482_SHD_SSD_LEDM |
BCM5482_SHD_SSD_EN);
/*
* Enable SGMII slave mode and auto-detection
*/
reg = bcm54xx_exp_read(phydev, 1, BCM5482_SSD_SGMII_SLAVE);
bcm54xx_exp_write(phydev, 1, BCM5482_SSD_SGMII_SLAVE,
reg |
BCM5482_SSD_SGMII_SLAVE_EN |
BCM5482_SSD_SGMII_SLAVE_AD);
/*
* Disable secondary SerDes powerdown
*/
reg = bcm54xx_exp_read(phydev, 1, BCM5482_SSD_1000BX_CTL);
bcm54xx_exp_write(phydev, 1, BCM5482_SSD_1000BX_CTL,
reg & ~BCM5482_SSD_1000BX_CTL_PWRDOWN);
/*
* Select 1000BASE-X register set (primary SerDes)
*/
reg = bcm54xx_shadow_read(phydev, BCM5482_SHD_MODE);
bcm54xx_shadow_write(phydev, BCM5482_SHD_MODE,
reg | BCM5482_SHD_MODE_1000BX);
/*
* LED1=ACTIVITYLED, LED3=LINKSPD[2]
* (Use LED1 as secondary SerDes ACTIVITY LED)
*/
bcm54xx_shadow_write(phydev, BCM5482_SHD_LEDS1,
BCM5482_SHD_LEDS1_LED1(BCM_LED_SRC_ACTIVITYLED) |
BCM5482_SHD_LEDS1_LED3(BCM_LED_SRC_LINKSPD2));
/*
* Auto-negotiation doesn't seem to work quite right
* in this mode, so we disable it and force it to the
* right speed/duplex setting. Only 'link status'
* is important.
*/
phydev->autoneg = AUTONEG_DISABLE;
phydev->speed = SPEED_1000;
phydev->duplex = DUPLEX_FULL;
}
return err;
}
static int bcm5482_read_status(struct phy_device *phydev)
{
int err;
err = genphy_read_status(phydev);
if (phydev->dev_flags & PHY_BCM_FLAGS_MODE_1000BX) {
/*
* Only link status matters for 1000Base-X mode, so force
* 1000 Mbit/s full-duplex status
*/
if (phydev->link) {
phydev->speed = SPEED_1000;
phydev->duplex = DUPLEX_FULL;
}
}
return err;
}
static int bcm54xx_ack_interrupt(struct phy_device *phydev)
{
int reg;
/* Clear pending interrupts. */
reg = phy_read(phydev, MII_BCM54XX_ISR);
if (reg < 0)
return reg;
return 0;
}
static int bcm54xx_config_intr(struct phy_device *phydev)
{
int reg, err;
reg = phy_read(phydev, MII_BCM54XX_ECR);
if (reg < 0)
return reg;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
reg &= ~MII_BCM54XX_ECR_IM;
else
reg |= MII_BCM54XX_ECR_IM;
err = phy_write(phydev, MII_BCM54XX_ECR, reg);
return err;
}
static int bcm5481_config_aneg(struct phy_device *phydev)
{
int ret;
/* Aneg firsly. */
ret = genphy_config_aneg(phydev);
/* Then we can set up the delay. */
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
u16 reg;
/*
* There is no BCM5481 specification available, so down
* here is everything we know about "register 0x18". This
* at least helps BCM5481 to successfuly receive packets
* on MPC8360E-RDK board. Peter Barada <peterb@logicpd.com>
* says: "This sets delay between the RXD and RXC signals
* instead of using trace lengths to achieve timing".
*/
/* Set RDX clk delay. */
reg = 0x7 | (0x7 << 12);
phy_write(phydev, 0x18, reg);
reg = phy_read(phydev, 0x18);
/* Set RDX-RXC skew. */
reg |= (1 << 8);
/* Write bits 14:0. */
reg |= (1 << 15);
phy_write(phydev, 0x18, reg);
}
return ret;
}
static struct phy_driver bcm5411_driver = {
.phy_id = 0x00206070,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5411",
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm54xx_ack_interrupt,
.config_intr = bcm54xx_config_intr,
.driver = { .owner = THIS_MODULE },
};
static struct phy_driver bcm5421_driver = {
.phy_id = 0x002060e0,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5421",
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm54xx_ack_interrupt,
.config_intr = bcm54xx_config_intr,
.driver = { .owner = THIS_MODULE },
};
static struct phy_driver bcm5461_driver = {
.phy_id = 0x002060c0,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5461",
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm54xx_ack_interrupt,
.config_intr = bcm54xx_config_intr,
.driver = { .owner = THIS_MODULE },
};
static struct phy_driver bcm5464_driver = {
.phy_id = 0x002060b0,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5464",
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm54xx_ack_interrupt,
.config_intr = bcm54xx_config_intr,
.driver = { .owner = THIS_MODULE },
};
static struct phy_driver bcm5481_driver = {
.phy_id = 0x0143bca0,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5481",
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = bcm5481_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm54xx_ack_interrupt,
.config_intr = bcm54xx_config_intr,
.driver = { .owner = THIS_MODULE },
};
static struct phy_driver bcm5482_driver = {
.phy_id = 0x0143bcb0,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5482",
.features = PHY_GBIT_FEATURES,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm5482_config_init,
.config_aneg = genphy_config_aneg,
.read_status = bcm5482_read_status,
.ack_interrupt = bcm54xx_ack_interrupt,
.config_intr = bcm54xx_config_intr,
.driver = { .owner = THIS_MODULE },
};
static int __init broadcom_init(void)
{
int ret;
ret = phy_driver_register(&bcm5411_driver);
if (ret)
goto out_5411;
ret = phy_driver_register(&bcm5421_driver);
if (ret)
goto out_5421;
ret = phy_driver_register(&bcm5461_driver);
if (ret)
goto out_5461;
ret = phy_driver_register(&bcm5464_driver);
if (ret)
goto out_5464;
ret = phy_driver_register(&bcm5481_driver);
if (ret)
goto out_5481;
ret = phy_driver_register(&bcm5482_driver);
if (ret)
goto out_5482;
return ret;
out_5482:
phy_driver_unregister(&bcm5481_driver);
out_5481:
phy_driver_unregister(&bcm5464_driver);
out_5464:
phy_driver_unregister(&bcm5461_driver);
out_5461:
phy_driver_unregister(&bcm5421_driver);
out_5421:
phy_driver_unregister(&bcm5411_driver);
out_5411:
return ret;
}
static void __exit broadcom_exit(void)
{
phy_driver_unregister(&bcm5482_driver);
phy_driver_unregister(&bcm5481_driver);
phy_driver_unregister(&bcm5464_driver);
phy_driver_unregister(&bcm5461_driver);
phy_driver_unregister(&bcm5421_driver);
phy_driver_unregister(&bcm5411_driver);
}
module_init(broadcom_init);
module_exit(broadcom_exit);
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