/*
* 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 "bcm-phy-lib.h"
#include <linux/module.h>
#include <linux/phy.h>
#include <linux/brcmphy.h>
#define BRCM_PHY_MODEL(phydev) \
((phydev)->drv->phy_id & (phydev)->drv->phy_id_mask)
#define BRCM_PHY_REV(phydev) \
((phydev)->drv->phy_id & ~((phydev)->drv->phy_id_mask))
MODULE_DESCRIPTION("Broadcom PHY driver");
MODULE_AUTHOR("Maciej W. Rozycki");
MODULE_LICENSE("GPL");
static int bcm54xx_auxctl_write(struct phy_device *phydev, u16 regnum, u16 val)
{
return phy_write(phydev, MII_BCM54XX_AUX_CTL, regnum | val);
}
/* Needs SMDSP clock enabled via bcm54xx_phydsp_config() */
static int bcm50610_a0_workaround(struct phy_device *phydev)
{
int err;
err = bcm_phy_write_exp(phydev, MII_BCM54XX_EXP_AADJ1CH0,
MII_BCM54XX_EXP_AADJ1CH0_SWP_ABCD_OEN |
MII_BCM54XX_EXP_AADJ1CH0_SWSEL_THPF);
if (err < 0)
return err;
err = bcm_phy_write_exp(phydev, MII_BCM54XX_EXP_AADJ1CH3,
MII_BCM54XX_EXP_AADJ1CH3_ADCCKADJ);
if (err < 0)
return err;
err = bcm_phy_write_exp(phydev, MII_BCM54XX_EXP_EXP75,
MII_BCM54XX_EXP_EXP75_VDACCTRL);
if (err < 0)
return err;
err = bcm_phy_write_exp(phydev, MII_BCM54XX_EXP_EXP96,
MII_BCM54XX_EXP_EXP96_MYST);
if (err < 0)
return err;
err = bcm_phy_write_exp(phydev, MII_BCM54XX_EXP_EXP97,
MII_BCM54XX_EXP_EXP97_MYST);
return err;
}
static int bcm54xx_phydsp_config(struct phy_device *phydev)
{
int err, err2;
/* Enable the SMDSP clock */
err = bcm54xx_auxctl_write(phydev,
MII_BCM54XX_AUXCTL_SHDWSEL_AUXCTL,
MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA |
MII_BCM54XX_AUXCTL_ACTL_TX_6DB);
if (err < 0)
return err;
if (BRCM_PHY_MODEL(phydev) == PHY_ID_BCM50610 ||
BRCM_PHY_MODEL(phydev) == PHY_ID_BCM50610M) {
/* Clear bit 9 to fix a phy interop issue. */
err = bcm_phy_write_exp(phydev, MII_BCM54XX_EXP_EXP08,
MII_BCM54XX_EXP_EXP08_RJCT_2MHZ);
if (err < 0)
goto error;
if (phydev->drv->phy_id == PHY_ID_BCM50610) {
err = bcm50610_a0_workaround(phydev);
if (err < 0)
goto error;
}
}
if (BRCM_PHY_MODEL(phydev) == PHY_ID_BCM57780) {
int val;
val = bcm_phy_read_exp(phydev, MII_BCM54XX_EXP_EXP75);
if (val < 0)
goto error;
val |= MII_BCM54XX_EXP_EXP75_CM_OSC;
err = bcm_phy_write_exp(phydev, MII_BCM54XX_EXP_EXP75, val);
}
error:
/* Disable the SMDSP clock */
err2 = bcm54xx_auxctl_write(phydev,
MII_BCM54XX_AUXCTL_SHDWSEL_AUXCTL,
MII_BCM54XX_AUXCTL_ACTL_TX_6DB);
/* Return the first error reported. */
return err ? err : err2;
}
static void bcm54xx_adjust_rxrefclk(struct phy_device *phydev)
{
u32 orig;
int val;
bool clk125en = true;
/* Abort if we are using an untested phy. */
if (BRCM_PHY_MODEL(phydev) != PHY_ID_BCM57780 &&
BRCM_PHY_MODEL(phydev) != PHY_ID_BCM50610 &&
BRCM_PHY_MODEL(phydev) != PHY_ID_BCM50610M)
return;
val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR3);
if (val < 0)
return;
orig = val;
if ((BRCM_PHY_MODEL(phydev) == PHY_ID_BCM50610 ||
BRCM_PHY_MODEL(phydev) == PHY_ID_BCM50610M) &&
BRCM_PHY_REV(phydev) >= 0x3) {
/*
* Here, bit 0 _disables_ CLK125 when set.
* This bit is set by default.
*/
clk125en = false;
} else {
if (phydev->dev_flags & PHY_BRCM_RX_REFCLK_UNUSED) {
/* Here, bit 0 _enables_ CLK125 when set */
val &= ~BCM54XX_SHD_SCR3_DEF_CLK125;
clk125en = false;
}
}
if (!clk125en || (phydev->dev_flags & PHY_BRCM_AUTO_PWRDWN_ENABLE))
val &= ~BCM54XX_SHD_SCR3_DLLAPD_DIS;
else
val |= BCM54XX_SHD_SCR3_DLLAPD_DIS;
if (phydev->dev_flags & PHY_BRCM_DIS_TXCRXC_NOENRGY)
val |= BCM54XX_SHD_SCR3_TRDDAPD;
if (orig != val)
bcm_phy_write_shadow(phydev, BCM54XX_SHD_SCR3, val);
val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_APD);
if (val < 0)
return;
orig = val;
if (!clk125en || (phydev->dev_flags & PHY_BRCM_AUTO_PWRDWN_ENABLE))
val |= BCM54XX_SHD_APD_EN;
else
val &= ~BCM54XX_SHD_APD_EN;
if (orig != val)
bcm_phy_write_shadow(phydev, BCM54XX_SHD_APD, val);
}
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;
if ((BRCM_PHY_MODEL(phydev) == PHY_ID_BCM50610 ||
BRCM_PHY_MODEL(phydev) == PHY_ID_BCM50610M) &&
(phydev->dev_flags & PHY_BRCM_CLEAR_RGMII_MODE))
bcm_phy_write_shadow(phydev, BCM54XX_SHD_RGMII_MODE, 0);
if ((phydev->dev_flags & PHY_BRCM_RX_REFCLK_UNUSED) ||
(phydev->dev_flags & PHY_BRCM_DIS_TXCRXC_NOENRGY) ||
(phydev->dev_flags & PHY_BRCM_AUTO_PWRDWN_ENABLE))
bcm54xx_adjust_rxrefclk(phydev);
bcm54xx_phydsp_config(phydev);
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 = bcm_phy_read_shadow(phydev, BCM5482_SHD_SSD);
bcm_phy_write_shadow(phydev, BCM5482_SHD_SSD,
reg |
BCM5482_SHD_SSD_LEDM |
BCM5482_SHD_SSD_EN);
/*
* Enable SGMII slave mode and auto-detection
*/
reg = BCM5482_SSD_SGMII_SLAVE | MII_BCM54XX_EXP_SEL_SSD;
err = bcm_phy_read_exp(phydev, reg);
if (err < 0)
return err;
err = bcm_phy_write_exp(phydev, reg, err |
BCM5482_SSD_SGMII_SLAVE_EN |
BCM5482_SSD_SGMII_SLAVE_AD);
if (err < 0)
return err;
/*
* Disable secondary SerDes powerdown
*/
reg = BCM5482_SSD_1000BX_CTL | MII_BCM54XX_EXP_SEL_SSD;
err = bcm_phy_read_exp(phydev, reg);
if (err < 0)
return err;
err = bcm_phy_write_exp(phydev, reg,
err & ~BCM5482_SSD_1000BX_CTL_PWRDOWN);
if (err < 0)
return err;
/*
* Select 1000BASE-X register set (primary SerDes)
*/
reg = bcm_phy_read_shadow(phydev, BCM5482_SHD_MODE);
bcm_phy_write_shadow(phydev, BCM5482_SHD_MODE,
reg | BCM5482_SHD_MODE_1000BX);
/*
* LED1=ACTIVITYLED, LED3=LINKSPD[2]
* (Use LED1 as secondary SerDes ACTIVITY LED)
*/
bcm_phy_write_shadow(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 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 successfully 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 int brcm_phy_setbits(struct phy_device *phydev, int reg, int set)
{
int val;
val = phy_read(phydev, reg);
if (val < 0)
return val;
return phy_write(phydev, reg, val | set);
}
static int brcm_fet_config_init(struct phy_device *phydev)
{
int reg, err, err2, brcmtest;
/* Reset the PHY to bring it to a known state. */
err = phy_write(phydev, MII_BMCR, BMCR_RESET);
if (err < 0)
return err;
reg = phy_read(phydev, MII_BRCM_FET_INTREG);
if (reg < 0)
return reg;
/* Unmask events we are interested in and mask interrupts globally. */
reg = MII_BRCM_FET_IR_DUPLEX_EN |
MII_BRCM_FET_IR_SPEED_EN |
MII_BRCM_FET_IR_LINK_EN |
MII_BRCM_FET_IR_ENABLE |
MII_BRCM_FET_IR_MASK;
err = phy_write(phydev, MII_BRCM_FET_INTREG, reg);
if (err < 0)
return err;
/* Enable shadow register access */
brcmtest = phy_read(phydev, MII_BRCM_FET_BRCMTEST);
if (brcmtest < 0)
return brcmtest;
reg = brcmtest | MII_BRCM_FET_BT_SRE;
err = phy_write(phydev, MII_BRCM_FET_BRCMTEST, reg);
if (err < 0)
return err;
/* Set the LED mode */
reg = phy_read(phydev, MII_BRCM_FET_SHDW_AUXMODE4);
if (reg < 0) {
err = reg;
goto done;
}
reg &= ~MII_BRCM_FET_SHDW_AM4_LED_MASK;
reg |= MII_BRCM_FET_SHDW_AM4_LED_MODE1;
err = phy_write(phydev, MII_BRCM_FET_SHDW_AUXMODE4, reg);
if (err < 0)
goto done;
/* Enable auto MDIX */
err = brcm_phy_setbits(phydev, MII_BRCM_FET_SHDW_MISCCTRL,
MII_BRCM_FET_SHDW_MC_FAME);
if (err < 0)
goto done;
if (phydev->dev_flags & PHY_BRCM_AUTO_PWRDWN_ENABLE) {
/* Enable auto power down */
err = brcm_phy_setbits(phydev, MII_BRCM_FET_SHDW_AUXSTAT2,
MII_BRCM_FET_SHDW_AS2_APDE);
}
done:
/* Disable shadow register access */
err2 = phy_write(phydev, MII_BRCM_FET_BRCMTEST, brcmtest);
if (!err)
err = err2;
return err;
}
static int brcm_fet_ack_interrupt(struct phy_device *phydev)
{
int reg;
/* Clear pending interrupts. */
reg = phy_read(phydev, MII_BRCM_FET_INTREG);
if (reg < 0)
return reg;
return 0;
}
static int brcm_fet_config_intr(struct phy_device *phydev)
{
int reg, err;
reg = phy_read(phydev, MII_BRCM_FET_INTREG);
if (reg < 0)
return reg;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
reg &= ~MII_BRCM_FET_IR_MASK;
else
reg |= MII_BRCM_FET_IR_MASK;
err = phy_write(phydev, MII_BRCM_FET_INTREG, reg);
return err;
}
static struct phy_driver broadcom_drivers[] = {
{
.phy_id = PHY_ID_BCM5411,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5411",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM5421,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5421",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM5461,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5461",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM54616S,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM54616S",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM5464,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5464",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM5481,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5481",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = bcm5481_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM5482,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5482",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm5482_config_init,
.config_aneg = genphy_config_aneg,
.read_status = bcm5482_read_status,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM50610,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM50610",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM50610M,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM50610M",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM57780,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM57780",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = bcm54xx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCMAC131,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCMAC131",
.features = PHY_BASIC_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = brcm_fet_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = brcm_fet_ack_interrupt,
.config_intr = brcm_fet_config_intr,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM5241,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM5241",
.features = PHY_BASIC_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
.config_init = brcm_fet_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = brcm_fet_ack_interrupt,
.config_intr = brcm_fet_config_intr,
.driver = { .owner = THIS_MODULE },
} };
module_phy_driver(broadcom_drivers);
static struct mdio_device_id __maybe_unused broadcom_tbl[] = {
{ PHY_ID_BCM5411, 0xfffffff0 },
{ PHY_ID_BCM5421, 0xfffffff0 },
{ PHY_ID_BCM5461, 0xfffffff0 },
{ PHY_ID_BCM54616S, 0xfffffff0 },
{ PHY_ID_BCM5464, 0xfffffff0 },
{ PHY_ID_BCM5481, 0xfffffff0 },
{ PHY_ID_BCM5482, 0xfffffff0 },
{ PHY_ID_BCM50610, 0xfffffff0 },
{ PHY_ID_BCM50610M, 0xfffffff0 },
{ PHY_ID_BCM57780, 0xfffffff0 },
{ PHY_ID_BCMAC131, 0xfffffff0 },
{ PHY_ID_BCM5241, 0xfffffff0 },
{ }
};
MODULE_DEVICE_TABLE(mdio, broadcom_tbl);