| Bogdan Purcareata | 15b9e53 | 2017-05-29 09:11:30 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2017 NXP |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * CORTINA is a registered trademark of Cortina Systems, Inc. |
| 15 | * |
| 16 | */ |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/phy.h> |
| 19 | |
| 20 | #define PHY_ID_CS4340 0x13e51002 |
| 21 | |
| 22 | #define VILLA_GLOBAL_CHIP_ID_LSB 0x0 |
| 23 | #define VILLA_GLOBAL_CHIP_ID_MSB 0x1 |
| 24 | |
| 25 | #define VILLA_GLOBAL_GPIO_1_INTS 0x017 |
| 26 | |
| 27 | static int cortina_read_reg(struct phy_device *phydev, u16 regnum) |
| 28 | { |
| 29 | return mdiobus_read(phydev->mdio.bus, phydev->mdio.addr, |
| 30 | MII_ADDR_C45 | regnum); |
| 31 | } |
| 32 | |
| 33 | static int cortina_config_aneg(struct phy_device *phydev) |
| 34 | { |
| 35 | phydev->supported = SUPPORTED_10000baseT_Full; |
| 36 | phydev->advertising = SUPPORTED_10000baseT_Full; |
| 37 | |
| 38 | return 0; |
| 39 | } |
| 40 | |
| 41 | static int cortina_read_status(struct phy_device *phydev) |
| 42 | { |
| 43 | int gpio_int_status, ret = 0; |
| 44 | |
| 45 | gpio_int_status = cortina_read_reg(phydev, VILLA_GLOBAL_GPIO_1_INTS); |
| 46 | if (gpio_int_status < 0) { |
| 47 | ret = gpio_int_status; |
| 48 | goto err; |
| 49 | } |
| 50 | |
| 51 | if (gpio_int_status & 0x8) { |
| 52 | /* up when edc_convergedS set */ |
| 53 | phydev->speed = SPEED_10000; |
| 54 | phydev->duplex = DUPLEX_FULL; |
| 55 | phydev->link = 1; |
| 56 | } else { |
| 57 | phydev->link = 0; |
| 58 | } |
| 59 | |
| 60 | err: |
| 61 | return ret; |
| 62 | } |
| 63 | |
| 64 | static int cortina_soft_reset(struct phy_device *phydev) |
| 65 | { |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | static int cortina_probe(struct phy_device *phydev) |
| 70 | { |
| 71 | u32 phy_id = 0; |
| 72 | int id_lsb = 0, id_msb = 0; |
| 73 | |
| 74 | /* Read device id from phy registers. */ |
| 75 | id_lsb = cortina_read_reg(phydev, VILLA_GLOBAL_CHIP_ID_LSB); |
| 76 | if (id_lsb < 0) |
| 77 | return -ENXIO; |
| 78 | |
| 79 | phy_id = id_lsb << 16; |
| 80 | |
| 81 | id_msb = cortina_read_reg(phydev, VILLA_GLOBAL_CHIP_ID_MSB); |
| 82 | if (id_msb < 0) |
| 83 | return -ENXIO; |
| 84 | |
| 85 | phy_id |= id_msb; |
| 86 | |
| 87 | /* Make sure the device tree binding matched the driver with the |
| 88 | * right device. |
| 89 | */ |
| 90 | if (phy_id != phydev->drv->phy_id) { |
| 91 | phydev_err(phydev, "Error matching phy with %s driver\n", |
| 92 | phydev->drv->name); |
| 93 | return -ENODEV; |
| 94 | } |
| 95 | |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static struct phy_driver cortina_driver[] = { |
| 100 | { |
| 101 | .phy_id = PHY_ID_CS4340, |
| 102 | .phy_id_mask = 0xffffffff, |
| 103 | .name = "Cortina CS4340", |
| 104 | .config_aneg = cortina_config_aneg, |
| 105 | .read_status = cortina_read_status, |
| 106 | .soft_reset = cortina_soft_reset, |
| 107 | .probe = cortina_probe, |
| 108 | }, |
| 109 | }; |
| 110 | |
| 111 | module_phy_driver(cortina_driver); |
| 112 | |
| 113 | static struct mdio_device_id __maybe_unused cortina_tbl[] = { |
| 114 | { PHY_ID_CS4340, 0xffffffff}, |
| 115 | {}, |
| 116 | }; |
| 117 | |
| 118 | MODULE_DEVICE_TABLE(mdio, cortina_tbl); |