Commit 15b9e533 authored by Bogdan Purcareata's avatar Bogdan Purcareata Committed by David S. Miller

net: phy: Add Cortina CS4340 driver

Add basic support for Cortina PHY drivers. Support only CS4340 for now.
The phys are not compatible with IEEE 802.3 clause 22/45 registers.

Implement proper read_status support. The generic 10G phy driver causes
bus register access errors.

The driver should be described using the "ethernet-phy-id" device tree
compatible.
Signed-off-by: default avatarBogdan Purcareata <bogdan.purcareata@nxp.com>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent eb67e07a
...@@ -234,6 +234,11 @@ config CICADA_PHY ...@@ -234,6 +234,11 @@ config CICADA_PHY
---help--- ---help---
Currently supports the cis8204 Currently supports the cis8204
config CORTINA_PHY
tristate "Cortina EDC CDR 10G Ethernet PHY"
---help---
Currently supports the CS4340 phy.
config DAVICOM_PHY config DAVICOM_PHY
tristate "Davicom PHYs" tristate "Davicom PHYs"
---help--- ---help---
......
...@@ -46,6 +46,7 @@ obj-$(CONFIG_BCM_CYGNUS_PHY) += bcm-cygnus.o ...@@ -46,6 +46,7 @@ obj-$(CONFIG_BCM_CYGNUS_PHY) += bcm-cygnus.o
obj-$(CONFIG_BCM_NET_PHYLIB) += bcm-phy-lib.o obj-$(CONFIG_BCM_NET_PHYLIB) += bcm-phy-lib.o
obj-$(CONFIG_BROADCOM_PHY) += broadcom.o obj-$(CONFIG_BROADCOM_PHY) += broadcom.o
obj-$(CONFIG_CICADA_PHY) += cicada.o obj-$(CONFIG_CICADA_PHY) += cicada.o
obj-$(CONFIG_CORTINA_PHY) += cortina.o
obj-$(CONFIG_DAVICOM_PHY) += davicom.o obj-$(CONFIG_DAVICOM_PHY) += davicom.o
obj-$(CONFIG_DP83640_PHY) += dp83640.o obj-$(CONFIG_DP83640_PHY) += dp83640.o
obj-$(CONFIG_DP83848_PHY) += dp83848.o obj-$(CONFIG_DP83848_PHY) += dp83848.o
......
/*
* Copyright 2017 NXP
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* CORTINA is a registered trademark of Cortina Systems, Inc.
*
*/
#include <linux/module.h>
#include <linux/phy.h>
#define PHY_ID_CS4340 0x13e51002
#define VILLA_GLOBAL_CHIP_ID_LSB 0x0
#define VILLA_GLOBAL_CHIP_ID_MSB 0x1
#define VILLA_GLOBAL_GPIO_1_INTS 0x017
static int cortina_read_reg(struct phy_device *phydev, u16 regnum)
{
return mdiobus_read(phydev->mdio.bus, phydev->mdio.addr,
MII_ADDR_C45 | regnum);
}
static int cortina_config_aneg(struct phy_device *phydev)
{
phydev->supported = SUPPORTED_10000baseT_Full;
phydev->advertising = SUPPORTED_10000baseT_Full;
return 0;
}
static int cortina_read_status(struct phy_device *phydev)
{
int gpio_int_status, ret = 0;
gpio_int_status = cortina_read_reg(phydev, VILLA_GLOBAL_GPIO_1_INTS);
if (gpio_int_status < 0) {
ret = gpio_int_status;
goto err;
}
if (gpio_int_status & 0x8) {
/* up when edc_convergedS set */
phydev->speed = SPEED_10000;
phydev->duplex = DUPLEX_FULL;
phydev->link = 1;
} else {
phydev->link = 0;
}
err:
return ret;
}
static int cortina_soft_reset(struct phy_device *phydev)
{
return 0;
}
static int cortina_probe(struct phy_device *phydev)
{
u32 phy_id = 0;
int id_lsb = 0, id_msb = 0;
/* Read device id from phy registers. */
id_lsb = cortina_read_reg(phydev, VILLA_GLOBAL_CHIP_ID_LSB);
if (id_lsb < 0)
return -ENXIO;
phy_id = id_lsb << 16;
id_msb = cortina_read_reg(phydev, VILLA_GLOBAL_CHIP_ID_MSB);
if (id_msb < 0)
return -ENXIO;
phy_id |= id_msb;
/* Make sure the device tree binding matched the driver with the
* right device.
*/
if (phy_id != phydev->drv->phy_id) {
phydev_err(phydev, "Error matching phy with %s driver\n",
phydev->drv->name);
return -ENODEV;
}
return 0;
}
static struct phy_driver cortina_driver[] = {
{
.phy_id = PHY_ID_CS4340,
.phy_id_mask = 0xffffffff,
.name = "Cortina CS4340",
.config_aneg = cortina_config_aneg,
.read_status = cortina_read_status,
.soft_reset = cortina_soft_reset,
.probe = cortina_probe,
},
};
module_phy_driver(cortina_driver);
static struct mdio_device_id __maybe_unused cortina_tbl[] = {
{ PHY_ID_CS4340, 0xffffffff},
{},
};
MODULE_DEVICE_TABLE(mdio, cortina_tbl);
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