diff options
Diffstat (limited to 'drivers/net/phy/cortina.c')
-rw-r--r-- | drivers/net/phy/cortina.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/drivers/net/phy/cortina.c b/drivers/net/phy/cortina.c new file mode 100644 index 0000000000..40514a94e6 --- /dev/null +++ b/drivers/net/phy/cortina.c @@ -0,0 +1,99 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2017 NXP + * + * 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_c45_read(phydev->mdio.bus, phydev->mdio.addr, 0, regnum); +} + +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_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", + .features = PHY_10GBIT_FEATURES, + .config_aneg = gen10g_config_aneg, + .read_status = cortina_read_status, + .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); + +MODULE_DESCRIPTION("Cortina EDC CDR 10G Ethernet PHY driver"); +MODULE_AUTHOR("NXP"); +MODULE_LICENSE("GPL"); |