| /* | |
| * AMD 10Gb Ethernet driver | |
| * | |
| * This file is available to you under your choice of the following two | |
| * licenses: | |
| * | |
| * License 1: GPLv2 | |
| * | |
| * Copyright (c) 2014 Advanced Micro Devices, Inc. | |
| * | |
| * This file is free software; you may copy, redistribute 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 file 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. | |
| * | |
| * You should have received a copy of the GNU General Public License | |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| * | |
| * This file incorporates work covered by the following copyright and | |
| * permission notice: | |
| * The Synopsys DWC ETHER XGMAC Software Driver and documentation | |
| * (hereinafter "Software") is an unsupported proprietary work of Synopsys, | |
| * Inc. unless otherwise expressly agreed to in writing between Synopsys | |
| * and you. | |
| * | |
| * The Software IS NOT an item of Licensed Software or Licensed Product | |
| * under any End User Software License Agreement or Agreement for Licensed | |
| * Product with Synopsys or any supplement thereto. Permission is hereby | |
| * granted, free of charge, to any person obtaining a copy of this software | |
| * annotated with this license and the Software, to deal in the Software | |
| * without restriction, including without limitation the rights to use, | |
| * copy, modify, merge, publish, distribute, sublicense, and/or sell copies | |
| * of the Software, and to permit persons to whom the Software is furnished | |
| * to do so, subject to the following conditions: | |
| * | |
| * The above copyright notice and this permission notice shall be included | |
| * in all copies or substantial portions of the Software. | |
| * | |
| * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" | |
| * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
| * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A | |
| * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS | |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
| * THE POSSIBILITY OF SUCH DAMAGE. | |
| * | |
| * | |
| * License 2: Modified BSD | |
| * | |
| * Copyright (c) 2014 Advanced Micro Devices, Inc. | |
| * All rights reserved. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions are met: | |
| * * Redistributions of source code must retain the above copyright | |
| * notice, this list of conditions and the following disclaimer. | |
| * * Redistributions in binary form must reproduce the above copyright | |
| * notice, this list of conditions and the following disclaimer in the | |
| * documentation and/or other materials provided with the distribution. | |
| * * Neither the name of Advanced Micro Devices, Inc. nor the | |
| * names of its contributors may be used to endorse or promote products | |
| * derived from this software without specific prior written permission. | |
| * | |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY | |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| * | |
| * This file incorporates work covered by the following copyright and | |
| * permission notice: | |
| * The Synopsys DWC ETHER XGMAC Software Driver and documentation | |
| * (hereinafter "Software") is an unsupported proprietary work of Synopsys, | |
| * Inc. unless otherwise expressly agreed to in writing between Synopsys | |
| * and you. | |
| * | |
| * The Software IS NOT an item of Licensed Software or Licensed Product | |
| * under any End User Software License Agreement or Agreement for Licensed | |
| * Product with Synopsys or any supplement thereto. Permission is hereby | |
| * granted, free of charge, to any person obtaining a copy of this software | |
| * annotated with this license and the Software, to deal in the Software | |
| * without restriction, including without limitation the rights to use, | |
| * copy, modify, merge, publish, distribute, sublicense, and/or sell copies | |
| * of the Software, and to permit persons to whom the Software is furnished | |
| * to do so, subject to the following conditions: | |
| * | |
| * The above copyright notice and this permission notice shall be included | |
| * in all copies or substantial portions of the Software. | |
| * | |
| * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" | |
| * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
| * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A | |
| * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS | |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
| * THE POSSIBILITY OF SUCH DAMAGE. | |
| */ | |
| #include <linux/clk.h> | |
| #include <linux/clocksource.h> | |
| #include <linux/ptp_clock_kernel.h> | |
| #include <linux/net_tstamp.h> | |
| #include "xgbe.h" | |
| #include "xgbe-common.h" | |
| static u64 xgbe_cc_read(const struct cyclecounter *cc) | |
| { | |
| struct xgbe_prv_data *pdata = container_of(cc, | |
| struct xgbe_prv_data, | |
| tstamp_cc); | |
| u64 nsec; | |
| nsec = pdata->hw_if.get_tstamp_time(pdata); | |
| return nsec; | |
| } | |
| static int xgbe_adjfreq(struct ptp_clock_info *info, s32 delta) | |
| { | |
| struct xgbe_prv_data *pdata = container_of(info, | |
| struct xgbe_prv_data, | |
| ptp_clock_info); | |
| unsigned long flags; | |
| u64 adjust; | |
| u32 addend, diff; | |
| unsigned int neg_adjust = 0; | |
| if (delta < 0) { | |
| neg_adjust = 1; | |
| delta = -delta; | |
| } | |
| adjust = pdata->tstamp_addend; | |
| adjust *= delta; | |
| diff = div_u64(adjust, 1000000000UL); | |
| addend = (neg_adjust) ? pdata->tstamp_addend - diff : | |
| pdata->tstamp_addend + diff; | |
| spin_lock_irqsave(&pdata->tstamp_lock, flags); | |
| pdata->hw_if.update_tstamp_addend(pdata, addend); | |
| spin_unlock_irqrestore(&pdata->tstamp_lock, flags); | |
| return 0; | |
| } | |
| static int xgbe_adjtime(struct ptp_clock_info *info, s64 delta) | |
| { | |
| struct xgbe_prv_data *pdata = container_of(info, | |
| struct xgbe_prv_data, | |
| ptp_clock_info); | |
| unsigned long flags; | |
| spin_lock_irqsave(&pdata->tstamp_lock, flags); | |
| timecounter_adjtime(&pdata->tstamp_tc, delta); | |
| spin_unlock_irqrestore(&pdata->tstamp_lock, flags); | |
| return 0; | |
| } | |
| static int xgbe_gettime(struct ptp_clock_info *info, struct timespec64 *ts) | |
| { | |
| struct xgbe_prv_data *pdata = container_of(info, | |
| struct xgbe_prv_data, | |
| ptp_clock_info); | |
| unsigned long flags; | |
| u64 nsec; | |
| spin_lock_irqsave(&pdata->tstamp_lock, flags); | |
| nsec = timecounter_read(&pdata->tstamp_tc); | |
| spin_unlock_irqrestore(&pdata->tstamp_lock, flags); | |
| *ts = ns_to_timespec64(nsec); | |
| return 0; | |
| } | |
| static int xgbe_settime(struct ptp_clock_info *info, | |
| const struct timespec64 *ts) | |
| { | |
| struct xgbe_prv_data *pdata = container_of(info, | |
| struct xgbe_prv_data, | |
| ptp_clock_info); | |
| unsigned long flags; | |
| u64 nsec; | |
| nsec = timespec64_to_ns(ts); | |
| spin_lock_irqsave(&pdata->tstamp_lock, flags); | |
| timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, nsec); | |
| spin_unlock_irqrestore(&pdata->tstamp_lock, flags); | |
| return 0; | |
| } | |
| static int xgbe_enable(struct ptp_clock_info *info, | |
| struct ptp_clock_request *request, int on) | |
| { | |
| return -EOPNOTSUPP; | |
| } | |
| void xgbe_ptp_register(struct xgbe_prv_data *pdata) | |
| { | |
| struct ptp_clock_info *info = &pdata->ptp_clock_info; | |
| struct ptp_clock *clock; | |
| struct cyclecounter *cc = &pdata->tstamp_cc; | |
| u64 dividend; | |
| snprintf(info->name, sizeof(info->name), "%s", | |
| netdev_name(pdata->netdev)); | |
| info->owner = THIS_MODULE; | |
| info->max_adj = pdata->ptpclk_rate; | |
| info->adjfreq = xgbe_adjfreq; | |
| info->adjtime = xgbe_adjtime; | |
| info->gettime64 = xgbe_gettime; | |
| info->settime64 = xgbe_settime; | |
| info->enable = xgbe_enable; | |
| clock = ptp_clock_register(info, pdata->dev); | |
| if (IS_ERR(clock)) { | |
| dev_err(pdata->dev, "ptp_clock_register failed\n"); | |
| return; | |
| } | |
| pdata->ptp_clock = clock; | |
| /* Calculate the addend: | |
| * addend = 2^32 / (PTP ref clock / 50Mhz) | |
| * = (2^32 * 50Mhz) / PTP ref clock | |
| */ | |
| dividend = 50000000; | |
| dividend <<= 32; | |
| pdata->tstamp_addend = div_u64(dividend, pdata->ptpclk_rate); | |
| /* Setup the timecounter */ | |
| cc->read = xgbe_cc_read; | |
| cc->mask = CLOCKSOURCE_MASK(64); | |
| cc->mult = 1; | |
| cc->shift = 0; | |
| timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, | |
| ktime_to_ns(ktime_get_real())); | |
| /* Disable all timestamping to start */ | |
| XGMAC_IOWRITE(pdata, MAC_TSCR, 0); | |
| pdata->tstamp_config.tx_type = HWTSTAMP_TX_OFF; | |
| pdata->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE; | |
| } | |
| void xgbe_ptp_unregister(struct xgbe_prv_data *pdata) | |
| { | |
| if (pdata->ptp_clock) | |
| ptp_clock_unregister(pdata->ptp_clock); | |
| } |