Andrew Lunn | a2443fd | 2019-01-21 19:05:50 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
Bogdan Purcareata | 15b9e53 | 2017-05-29 09:11:30 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright 2017 NXP |
| 4 | * |
Bogdan Purcareata | 15b9e53 | 2017-05-29 09:11:30 +0000 | [diff] [blame] | 5 | * CORTINA is a registered trademark of Cortina Systems, Inc. |
| 6 | * |
| 7 | */ |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/phy.h> |
| 10 | |
| 11 | #define PHY_ID_CS4340 0x13e51002 |
| 12 | |
| 13 | #define VILLA_GLOBAL_CHIP_ID_LSB 0x0 |
| 14 | #define VILLA_GLOBAL_CHIP_ID_MSB 0x1 |
| 15 | |
| 16 | #define VILLA_GLOBAL_GPIO_1_INTS 0x017 |
| 17 | |
| 18 | static int cortina_read_reg(struct phy_device *phydev, u16 regnum) |
| 19 | { |
Russell King | 90ce665 | 2020-05-26 16:29:36 +0100 | [diff] [blame] | 20 | return mdiobus_c45_read(phydev->mdio.bus, phydev->mdio.addr, 0, regnum); |
Bogdan Purcareata | 15b9e53 | 2017-05-29 09:11:30 +0000 | [diff] [blame] | 21 | } |
| 22 | |
Bogdan Purcareata | 15b9e53 | 2017-05-29 09:11:30 +0000 | [diff] [blame] | 23 | static int cortina_read_status(struct phy_device *phydev) |
| 24 | { |
| 25 | int gpio_int_status, ret = 0; |
| 26 | |
| 27 | gpio_int_status = cortina_read_reg(phydev, VILLA_GLOBAL_GPIO_1_INTS); |
| 28 | if (gpio_int_status < 0) { |
| 29 | ret = gpio_int_status; |
| 30 | goto err; |
| 31 | } |
| 32 | |
| 33 | if (gpio_int_status & 0x8) { |
| 34 | /* up when edc_convergedS set */ |
| 35 | phydev->speed = SPEED_10000; |
| 36 | phydev->duplex = DUPLEX_FULL; |
| 37 | phydev->link = 1; |
| 38 | } else { |
| 39 | phydev->link = 0; |
| 40 | } |
| 41 | |
| 42 | err: |
| 43 | return ret; |
| 44 | } |
| 45 | |
Bogdan Purcareata | 15b9e53 | 2017-05-29 09:11:30 +0000 | [diff] [blame] | 46 | static int cortina_probe(struct phy_device *phydev) |
| 47 | { |
| 48 | u32 phy_id = 0; |
| 49 | int id_lsb = 0, id_msb = 0; |
| 50 | |
| 51 | /* Read device id from phy registers. */ |
| 52 | id_lsb = cortina_read_reg(phydev, VILLA_GLOBAL_CHIP_ID_LSB); |
| 53 | if (id_lsb < 0) |
| 54 | return -ENXIO; |
| 55 | |
| 56 | phy_id = id_lsb << 16; |
| 57 | |
| 58 | id_msb = cortina_read_reg(phydev, VILLA_GLOBAL_CHIP_ID_MSB); |
| 59 | if (id_msb < 0) |
| 60 | return -ENXIO; |
| 61 | |
| 62 | phy_id |= id_msb; |
| 63 | |
| 64 | /* Make sure the device tree binding matched the driver with the |
| 65 | * right device. |
| 66 | */ |
| 67 | if (phy_id != phydev->drv->phy_id) { |
| 68 | phydev_err(phydev, "Error matching phy with %s driver\n", |
| 69 | phydev->drv->name); |
| 70 | return -ENODEV; |
| 71 | } |
| 72 | |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 76 | static struct phy_driver cortina_driver[] = { |
| 77 | { |
| 78 | .phy_id = PHY_ID_CS4340, |
| 79 | .phy_id_mask = 0xffffffff, |
| 80 | .name = "Cortina CS4340", |
Camelia Groza | 40f89eb | 2019-01-17 14:33:33 +0200 | [diff] [blame] | 81 | .features = PHY_10GBIT_FEATURES, |
Florian Fainelli | 0adfdb6 | 2018-03-01 16:08:58 -0800 | [diff] [blame] | 82 | .config_aneg = gen10g_config_aneg, |
Bogdan Purcareata | 15b9e53 | 2017-05-29 09:11:30 +0000 | [diff] [blame] | 83 | .read_status = cortina_read_status, |
Bogdan Purcareata | 15b9e53 | 2017-05-29 09:11:30 +0000 | [diff] [blame] | 84 | .probe = cortina_probe, |
| 85 | }, |
| 86 | }; |
| 87 | |
| 88 | module_phy_driver(cortina_driver); |
| 89 | |
| 90 | static struct mdio_device_id __maybe_unused cortina_tbl[] = { |
| 91 | { PHY_ID_CS4340, 0xffffffff}, |
| 92 | {}, |
| 93 | }; |
| 94 | |
| 95 | MODULE_DEVICE_TABLE(mdio, cortina_tbl); |
Jesse Chan | 0cc03504 | 2017-11-20 12:57:42 -0800 | [diff] [blame] | 96 | |
| 97 | MODULE_DESCRIPTION("Cortina EDC CDR 10G Ethernet PHY driver"); |
| 98 | MODULE_AUTHOR("NXP"); |
| 99 | MODULE_LICENSE("GPL"); |