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/*
* Copyright (C) 2015 Broadcom Corporation
*
* 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 version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
/* Broadcom Cygnus SoC internal transceivers support. */
#include "bcm-phy-lib.h"
#include <linux/brcmphy.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
/* Broadcom Cygnus Phy specific registers */
#define MII_BCM_CYGNUS_AFE_VDAC_ICTRL_0 0x91E5 /* VDAL Control register */
static int bcm_cygnus_afe_config(struct phy_device *phydev)
{
int rc;
/* ensure smdspclk is enabled */
rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, 0x0c30);
if (rc < 0)
return rc;
/* AFE_VDAC_ICTRL_0 bit 7:4 Iq=1100 for 1g 10bt, normal modes */
rc = bcm_phy_write_misc(phydev, 0x39, 0x01, 0xA7C8);
if (rc < 0)
return rc;
/* AFE_HPF_TRIM_OTHERS bit11=1, short cascode enable for all modes*/
rc = bcm_phy_write_misc(phydev, 0x3A, 0x00, 0x0803);
if (rc < 0)
return rc;
/* AFE_TX_CONFIG_1 bit 7:4 Iq=1100 for test modes */
rc = bcm_phy_write_misc(phydev, 0x3A, 0x01, 0xA740);
if (rc < 0)
return rc;
/* AFE TEMPSEN_OTHERS rcal_HT, rcal_LT 10000 */
rc = bcm_phy_write_misc(phydev, 0x3A, 0x03, 0x8400);
if (rc < 0)
return rc;
/* AFE_FUTURE_RSV bit 2:0 rccal <2:0>=100 */
rc = bcm_phy_write_misc(phydev, 0x3B, 0x00, 0x0004);
if (rc < 0)
return rc;
/* Adjust bias current trim to overcome digital offSet */
rc = phy_write(phydev, MII_BRCM_CORE_BASE1E, 0x02);
if (rc < 0)
return rc;
/* make rcal=100, since rdb default is 000 */
rc = bcm_phy_write_exp(phydev, MII_BRCM_CORE_EXPB1, 0x10);
if (rc < 0)
return rc;
/* CORE_EXPB0, Reset R_CAL/RC_CAL Engine */
rc = bcm_phy_write_exp(phydev, MII_BRCM_CORE_EXPB0, 0x10);
if (rc < 0)
return rc;
/* CORE_EXPB0, Disable Reset R_CAL/RC_CAL Engine */
rc = bcm_phy_write_exp(phydev, MII_BRCM_CORE_EXPB0, 0x00);
return 0;
}
static int bcm_cygnus_config_init(struct phy_device *phydev)
{
int reg, rc;
reg = phy_read(phydev, MII_BCM54XX_ECR);
if (reg < 0)
return reg;
/* Mask interrupts globally. */
reg |= MII_BCM54XX_ECR_IM;
rc = phy_write(phydev, MII_BCM54XX_ECR, reg);
if (rc)
return rc;
/* Unmask events of interest */
reg = ~(MII_BCM54XX_INT_DUPLEX |
MII_BCM54XX_INT_SPEED |
MII_BCM54XX_INT_LINK);
rc = phy_write(phydev, MII_BCM54XX_IMR, reg);
if (rc)
return rc;
/* Apply AFE settings for the PHY */
rc = bcm_cygnus_afe_config(phydev);
if (rc)
return rc;
/* Advertise EEE */
rc = bcm_phy_set_eee(phydev, true);
if (rc)
return rc;
/* Enable APD */
return bcm_phy_enable_apd(phydev, false);
}
static int bcm_cygnus_resume(struct phy_device *phydev)
{
int rc;
genphy_resume(phydev);
/* Re-initialize the PHY to apply AFE work-arounds and
* configurations when coming out of suspend.
*/
rc = bcm_cygnus_config_init(phydev);
if (rc)
return rc;
/* restart auto negotiation with the new settings */
return genphy_config_aneg(phydev);
}
static struct phy_driver bcm_cygnus_phy_driver[] = {
{
.phy_id = PHY_ID_BCM_CYGNUS,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom Cygnus PHY",
.features = PHY_GBIT_FEATURES,
.config_init = bcm_cygnus_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
.suspend = genphy_suspend,
.resume = bcm_cygnus_resume,
} };
static struct mdio_device_id __maybe_unused bcm_cygnus_phy_tbl[] = {
{ PHY_ID_BCM_CYGNUS, 0xfffffff0, },
{ }
};
MODULE_DEVICE_TABLE(mdio, bcm_cygnus_phy_tbl);
module_phy_driver(bcm_cygnus_phy_driver);
MODULE_DESCRIPTION("Broadcom Cygnus internal PHY driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Broadcom Corporation");
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