| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jerome Brunet | 650 | 75.32% | 7 | 77.78% |
| Neil Armstrong | 212 | 24.57% | 1 | 11.11% |
| Colin Ian King | 1 | 0.12% | 1 | 11.11% |
| Total | 863 | 9 |
/* * Amlogic Meson GXL Internal PHY Driver * * Copyright (C) 2015 Amlogic, Inc. All rights reserved. * Copyright (C) 2016 BayLibre, SAS. All rights reserved. * Author: Neil Armstrong <narmstrong@baylibre.com> * * 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. * */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/mii.h> #include <linux/ethtool.h> #include <linux/phy.h> #include <linux/netdevice.h> #include <linux/bitfield.h> #define TSTCNTL 20 #define TSTCNTL_READ BIT(15) #define TSTCNTL_WRITE BIT(14) #define TSTCNTL_REG_BANK_SEL GENMASK(12, 11) #define TSTCNTL_TEST_MODE BIT(10) #define TSTCNTL_READ_ADDRESS GENMASK(9, 5) #define TSTCNTL_WRITE_ADDRESS GENMASK(4, 0) #define TSTREAD1 21 #define TSTWRITE 23 #define INTSRC_FLAG 29 #define INTSRC_ANEG_PR BIT(1) #define INTSRC_PARALLEL_FAULT BIT(2) #define INTSRC_ANEG_LP_ACK BIT(3) #define INTSRC_LINK_DOWN BIT(4) #define INTSRC_REMOTE_FAULT BIT(5) #define INTSRC_ANEG_COMPLETE BIT(6) #define INTSRC_MASK 30 #define BANK_ANALOG_DSP 0 #define BANK_WOL 1 #define BANK_BIST 3 /* WOL Registers */ #define LPI_STATUS 0xc #define LPI_STATUS_RSV12 BIT(12) /* BIST Registers */ #define FR_PLL_CONTROL 0x1b #define FR_PLL_DIV0 0x1c #define FR_PLL_DIV1 0x1d static int meson_gxl_open_banks(struct phy_device *phydev) { int ret; /* Enable Analog and DSP register Bank access by * toggling TSTCNTL_TEST_MODE bit in the TSTCNTL register */ ret = phy_write(phydev, TSTCNTL, 0); if (ret) return ret; ret = phy_write(phydev, TSTCNTL, TSTCNTL_TEST_MODE); if (ret) return ret; ret = phy_write(phydev, TSTCNTL, 0); if (ret) return ret; return phy_write(phydev, TSTCNTL, TSTCNTL_TEST_MODE); } static void meson_gxl_close_banks(struct phy_device *phydev) { phy_write(phydev, TSTCNTL, 0); } static int meson_gxl_read_reg(struct phy_device *phydev, unsigned int bank, unsigned int reg) { int ret; ret = meson_gxl_open_banks(phydev); if (ret) goto out; ret = phy_write(phydev, TSTCNTL, TSTCNTL_READ | FIELD_PREP(TSTCNTL_REG_BANK_SEL, bank) | TSTCNTL_TEST_MODE | FIELD_PREP(TSTCNTL_READ_ADDRESS, reg)); if (ret) goto out; ret = phy_read(phydev, TSTREAD1); out: /* Close the bank access on our way out */ meson_gxl_close_banks(phydev); return ret; } static int meson_gxl_write_reg(struct phy_device *phydev, unsigned int bank, unsigned int reg, uint16_t value) { int ret; ret = meson_gxl_open_banks(phydev); if (ret) goto out; ret = phy_write(phydev, TSTWRITE, value); if (ret) goto out; ret = phy_write(phydev, TSTCNTL, TSTCNTL_WRITE | FIELD_PREP(TSTCNTL_REG_BANK_SEL, bank) | TSTCNTL_TEST_MODE | FIELD_PREP(TSTCNTL_WRITE_ADDRESS, reg)); out: /* Close the bank access on our way out */ meson_gxl_close_banks(phydev); return ret; } static int meson_gxl_config_init(struct phy_device *phydev) { int ret; /* Enable fractional PLL */ ret = meson_gxl_write_reg(phydev, BANK_BIST, FR_PLL_CONTROL, 0x5); if (ret) return ret; /* Program fraction FR_PLL_DIV1 */ ret = meson_gxl_write_reg(phydev, BANK_BIST, FR_PLL_DIV1, 0x029a); if (ret) return ret; /* Program fraction FR_PLL_DIV1 */ ret = meson_gxl_write_reg(phydev, BANK_BIST, FR_PLL_DIV0, 0xaaaa); if (ret) return ret; return genphy_config_init(phydev); } /* This function is provided to cope with the possible failures of this phy * during aneg process. When aneg fails, the PHY reports that aneg is done * but the value found in MII_LPA is wrong: * - Early failures: MII_LPA is just 0x0001. if MII_EXPANSION reports that * the link partner (LP) supports aneg but the LP never acked our base * code word, it is likely that we never sent it to begin with. * - Late failures: MII_LPA is filled with a value which seems to make sense * but it actually is not what the LP is advertising. It seems that we * can detect this using a magic bit in the WOL bank (reg 12 - bit 12). * If this particular bit is not set when aneg is reported being done, * it means MII_LPA is likely to be wrong. * * In both case, forcing a restart of the aneg process solve the problem. * When this failure happens, the first retry is usually successful but, * in some cases, it may take up to 6 retries to get a decent result */ static int meson_gxl_read_status(struct phy_device *phydev) { int ret, wol, lpa, exp; if (phydev->autoneg == AUTONEG_ENABLE) { ret = genphy_aneg_done(phydev); if (ret < 0) return ret; else if (!ret) goto read_status_continue; /* Aneg is done, let's check everything is fine */ wol = meson_gxl_read_reg(phydev, BANK_WOL, LPI_STATUS); if (wol < 0) return wol; lpa = phy_read(phydev, MII_LPA); if (lpa < 0) return lpa; exp = phy_read(phydev, MII_EXPANSION); if (exp < 0) return exp; if (!(wol & LPI_STATUS_RSV12) || ((exp & EXPANSION_NWAY) && !(lpa & LPA_LPACK))) { /* Looks like aneg failed after all */ phydev_dbg(phydev, "LPA corruption - aneg restart\n"); return genphy_restart_aneg(phydev); } } read_status_continue: return genphy_read_status(phydev); } static int meson_gxl_ack_interrupt(struct phy_device *phydev) { int ret = phy_read(phydev, INTSRC_FLAG); return ret < 0 ? ret : 0; } static int meson_gxl_config_intr(struct phy_device *phydev) { u16 val; if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { val = INTSRC_ANEG_PR | INTSRC_PARALLEL_FAULT | INTSRC_ANEG_LP_ACK | INTSRC_LINK_DOWN | INTSRC_REMOTE_FAULT | INTSRC_ANEG_COMPLETE; } else { val = 0; } return phy_write(phydev, INTSRC_MASK, val); } static struct phy_driver meson_gxl_phy[] = { { .phy_id = 0x01814400, .phy_id_mask = 0xfffffff0, .name = "Meson GXL Internal PHY", .features = PHY_BASIC_FEATURES, .flags = PHY_IS_INTERNAL | PHY_HAS_INTERRUPT, .config_init = meson_gxl_config_init, .aneg_done = genphy_aneg_done, .read_status = meson_gxl_read_status, .ack_interrupt = meson_gxl_ack_interrupt, .config_intr = meson_gxl_config_intr, .suspend = genphy_suspend, .resume = genphy_resume, }, }; static struct mdio_device_id __maybe_unused meson_gxl_tbl[] = { { 0x01814400, 0xfffffff0 }, { } }; module_phy_driver(meson_gxl_phy); MODULE_DEVICE_TABLE(mdio, meson_gxl_tbl); MODULE_DESCRIPTION("Amlogic Meson GXL Internal PHY driver"); MODULE_AUTHOR("Baoqi wang"); MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>"); MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>"); MODULE_LICENSE("GPL");
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