Tom Rini | 10e4779 | 2018-05-06 17:58:06 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
Andy Fleming | 60ca78b | 2011-04-07 21:56:05 -0500 | [diff] [blame] | 2 | /* |
| 3 | * Teranetics PHY drivers |
| 4 | * |
Andy Fleming | 60ca78b | 2011-04-07 21:56:05 -0500 | [diff] [blame] | 5 | * Copyright 2010-2011 Freescale Semiconductor, Inc. |
| 6 | * author Andy Fleming |
Andy Fleming | 60ca78b | 2011-04-07 21:56:05 -0500 | [diff] [blame] | 7 | */ |
Timur Tabi | a07b497 | 2011-10-07 15:35:21 -0500 | [diff] [blame] | 8 | #include <common.h> |
Andy Fleming | 60ca78b | 2011-04-07 21:56:05 -0500 | [diff] [blame] | 9 | #include <phy.h> |
Simon Glass | dbd7954 | 2020-05-10 11:40:11 -0600 | [diff] [blame] | 10 | #include <linux/delay.h> |
Andy Fleming | 60ca78b | 2011-04-07 21:56:05 -0500 | [diff] [blame] | 11 | |
| 12 | #ifndef CONFIG_PHYLIB_10G |
| 13 | #error The Teranetics PHY needs 10G support |
| 14 | #endif |
| 15 | |
| 16 | int tn2020_config(struct phy_device *phydev) |
| 17 | { |
| 18 | if (phydev->port == PORT_FIBRE) { |
| 19 | unsigned short restart_an = (MDIO_AN_CTRL1_RESTART | |
| 20 | MDIO_AN_CTRL1_ENABLE | |
| 21 | MDIO_AN_CTRL1_XNP); |
Shaohui Xie | 6bf9ec5 | 2013-03-25 07:39:59 +0000 | [diff] [blame] | 22 | u8 phy_hwversion; |
Andy Fleming | 60ca78b | 2011-04-07 21:56:05 -0500 | [diff] [blame] | 23 | |
Shaohui Xie | 6bf9ec5 | 2013-03-25 07:39:59 +0000 | [diff] [blame] | 24 | /* |
| 25 | * bit 15:12 of register 30.32 indicates PHY hardware |
| 26 | * version. It can be used to distinguish TN80xx from |
| 27 | * TN2020. TN2020 needs write 0x2 to 30.93, but TN80xx |
| 28 | * needs 0x1. |
| 29 | */ |
| 30 | phy_hwversion = (phy_read(phydev, 30, 32) >> 12) & 0xf; |
| 31 | if (phy_hwversion <= 3) { |
| 32 | phy_write(phydev, 30, 93, 2); |
| 33 | phy_write(phydev, MDIO_MMD_AN, MDIO_CTRL1, restart_an); |
| 34 | } else { |
| 35 | phy_write(phydev, 30, 93, 1); |
| 36 | } |
Andy Fleming | 60ca78b | 2011-04-07 21:56:05 -0500 | [diff] [blame] | 37 | } |
| 38 | |
| 39 | return 0; |
| 40 | } |
| 41 | |
Andy Fleming | 9d85174 | 2011-04-20 18:41:17 -0500 | [diff] [blame] | 42 | int tn2020_startup(struct phy_device *phydev) |
| 43 | { |
Timur Tabi | a07b497 | 2011-10-07 15:35:21 -0500 | [diff] [blame] | 44 | unsigned int timeout = 5 * 1000; /* 5 second timeout */ |
| 45 | |
| 46 | #define MDIO_PHYXS_LANE_READY (MDIO_PHYXS_LNSTAT_SYNC0 | \ |
| 47 | MDIO_PHYXS_LNSTAT_SYNC1 | \ |
| 48 | MDIO_PHYXS_LNSTAT_SYNC2 | \ |
| 49 | MDIO_PHYXS_LNSTAT_SYNC3 | \ |
| 50 | MDIO_PHYXS_LNSTAT_ALIGN) |
| 51 | |
| 52 | /* |
| 53 | * Wait for the XAUI-SERDES lanes to align first. Under normal |
| 54 | * circumstances, this can take up to three seconds. |
| 55 | */ |
| 56 | while (--timeout) { |
| 57 | int reg = phy_read(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT); |
| 58 | if (reg < 0) { |
| 59 | printf("TN2020: Error reading from PHY at " |
| 60 | "address %u\n", phydev->addr); |
| 61 | break; |
| 62 | } |
| 63 | if ((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY) |
| 64 | break; |
| 65 | udelay(1000); |
| 66 | } |
| 67 | if (!timeout) { |
| 68 | /* |
| 69 | * A timeout is bad, but it may not be fatal, so don't |
| 70 | * return an error. Display a warning instead. |
| 71 | */ |
| 72 | printf("TN2020: Timeout waiting for PHY at address %u to " |
| 73 | "align.\n", phydev->addr); |
| 74 | } |
| 75 | |
Andy Fleming | 9d85174 | 2011-04-20 18:41:17 -0500 | [diff] [blame] | 76 | if (phydev->port != PORT_FIBRE) |
| 77 | return gen10g_startup(phydev); |
| 78 | |
| 79 | /* |
| 80 | * The TN2020 only pretends to support fiber. |
| 81 | * It works, but it doesn't look like it works, |
| 82 | * so the link status reports no link. |
| 83 | */ |
| 84 | phydev->link = 1; |
| 85 | |
| 86 | /* For now just lie and say it's 10G all the time */ |
| 87 | phydev->speed = SPEED_10000; |
| 88 | phydev->duplex = DUPLEX_FULL; |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |
Andy Fleming | 60ca78b | 2011-04-07 21:56:05 -0500 | [diff] [blame] | 93 | struct phy_driver tn2020_driver = { |
| 94 | .name = "Teranetics TN2020", |
Timur Tabi | 856f32f | 2011-10-18 18:44:34 -0500 | [diff] [blame] | 95 | .uid = PHY_UID_TN2020, |
Andy Fleming | 60ca78b | 2011-04-07 21:56:05 -0500 | [diff] [blame] | 96 | .mask = 0xfffffff0, |
| 97 | .features = PHY_10G_FEATURES, |
| 98 | .mmds = (MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS | |
| 99 | MDIO_DEVS_PHYXS | MDIO_DEVS_AN | |
| 100 | MDIO_DEVS_VEND1 | MDIO_DEVS_VEND2), |
| 101 | .config = &tn2020_config, |
Andy Fleming | 9d85174 | 2011-04-20 18:41:17 -0500 | [diff] [blame] | 102 | .startup = &tn2020_startup, |
Andy Fleming | 60ca78b | 2011-04-07 21:56:05 -0500 | [diff] [blame] | 103 | .shutdown = &gen10g_shutdown, |
| 104 | }; |
| 105 | |
| 106 | int phy_teranetics_init(void) |
| 107 | { |
| 108 | phy_register(&tn2020_driver); |
| 109 | |
| 110 | return 0; |
| 111 | } |