1/* 2 * AMD 10Gb Ethernet driver 3 * 4 * This file is available to you under your choice of the following two 5 * licenses: 6 * 7 * License 1: GPLv2 8 * 9 * Copyright (c) 2014 Advanced Micro Devices, Inc. 10 * 11 * This file is free software; you may copy, redistribute and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation, either version 2 of the License, or (at 14 * your option) any later version. 15 * 16 * This file is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program. If not, see <http://www.gnu.org/licenses/>. 23 * 24 * This file incorporates work covered by the following copyright and 25 * permission notice: 26 * The Synopsys DWC ETHER XGMAC Software Driver and documentation 27 * (hereinafter "Software") is an unsupported proprietary work of Synopsys, 28 * Inc. unless otherwise expressly agreed to in writing between Synopsys 29 * and you. 30 * 31 * The Software IS NOT an item of Licensed Software or Licensed Product 32 * under any End User Software License Agreement or Agreement for Licensed 33 * Product with Synopsys or any supplement thereto. Permission is hereby 34 * granted, free of charge, to any person obtaining a copy of this software 35 * annotated with this license and the Software, to deal in the Software 36 * without restriction, including without limitation the rights to use, 37 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies 38 * of the Software, and to permit persons to whom the Software is furnished 39 * to do so, subject to the following conditions: 40 * 41 * The above copyright notice and this permission notice shall be included 42 * in all copies or substantial portions of the Software. 43 * 44 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" 45 * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 46 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 47 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS 48 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 49 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 50 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 51 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 52 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 53 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 54 * THE POSSIBILITY OF SUCH DAMAGE. 55 * 56 * 57 * License 2: Modified BSD 58 * 59 * Copyright (c) 2014 Advanced Micro Devices, Inc. 60 * All rights reserved. 61 * 62 * Redistribution and use in source and binary forms, with or without 63 * modification, are permitted provided that the following conditions are met: 64 * * Redistributions of source code must retain the above copyright 65 * notice, this list of conditions and the following disclaimer. 66 * * Redistributions in binary form must reproduce the above copyright 67 * notice, this list of conditions and the following disclaimer in the 68 * documentation and/or other materials provided with the distribution. 69 * * Neither the name of Advanced Micro Devices, Inc. nor the 70 * names of its contributors may be used to endorse or promote products 71 * derived from this software without specific prior written permission. 72 * 73 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 74 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 75 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 76 * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY 77 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 78 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 79 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 80 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 81 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 82 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 83 * 84 * This file incorporates work covered by the following copyright and 85 * permission notice: 86 * The Synopsys DWC ETHER XGMAC Software Driver and documentation 87 * (hereinafter "Software") is an unsupported proprietary work of Synopsys, 88 * Inc. unless otherwise expressly agreed to in writing between Synopsys 89 * and you. 90 * 91 * The Software IS NOT an item of Licensed Software or Licensed Product 92 * under any End User Software License Agreement or Agreement for Licensed 93 * Product with Synopsys or any supplement thereto. Permission is hereby 94 * granted, free of charge, to any person obtaining a copy of this software 95 * annotated with this license and the Software, to deal in the Software 96 * without restriction, including without limitation the rights to use, 97 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies 98 * of the Software, and to permit persons to whom the Software is furnished 99 * to do so, subject to the following conditions: 100 * 101 * The above copyright notice and this permission notice shall be included 102 * in all copies or substantial portions of the Software. 103 * 104 * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" 105 * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 106 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 107 * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS 108 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 109 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 110 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 111 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 112 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 113 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 114 * THE POSSIBILITY OF SUCH DAMAGE. 115 */ 116#include <sys/cdefs.h> 117#include "xgbe.h" 118 119static u64 xgbe_cc_read(const struct cyclecounter *cc) 120{ 121 struct xgbe_prv_data *pdata = container_of(cc, 122 struct xgbe_prv_data, 123 tstamp_cc); 124 u64 nsec; 125 126 nsec = pdata->hw_if.get_tstamp_time(pdata); 127 128 return (nsec); 129} 130 131static int xgbe_adjfreq(struct ptp_clock_info *info, s32 delta) 132{ 133 struct xgbe_prv_data *pdata = container_of(info, 134 struct xgbe_prv_data, 135 ptp_clock_info); 136 unsigned long flags; 137 u64 adjust; 138 u32 addend, diff; 139 unsigned int neg_adjust = 0; 140 141 if (delta < 0) { 142 neg_adjust = 1; 143 delta = -delta; 144 } 145 146 adjust = pdata->tstamp_addend; 147 adjust *= delta; 148 diff = div_u64(adjust, 1000000000UL); 149 150 addend = (neg_adjust) ? pdata->tstamp_addend - diff : 151 pdata->tstamp_addend + diff; 152 153 spin_lock_irqsave(&pdata->tstamp_lock, flags); 154 155 pdata->hw_if.update_tstamp_addend(pdata, addend); 156 157 spin_unlock_irqrestore(&pdata->tstamp_lock, flags); 158 159 return (0); 160} 161 162static int xgbe_adjtime(struct ptp_clock_info *info, s64 delta) 163{ 164 struct xgbe_prv_data *pdata = container_of(info, 165 struct xgbe_prv_data, 166 ptp_clock_info); 167 unsigned long flags; 168 169 spin_lock_irqsave(&pdata->tstamp_lock, flags); 170 timecounter_adjtime(&pdata->tstamp_tc, delta); 171 spin_unlock_irqrestore(&pdata->tstamp_lock, flags); 172 173 return (0); 174} 175 176static int xgbe_gettime(struct ptp_clock_info *info, struct timespec64 *ts) 177{ 178 struct xgbe_prv_data *pdata = container_of(info, 179 struct xgbe_prv_data, 180 ptp_clock_info); 181 unsigned long flags; 182 u64 nsec; 183 184 spin_lock_irqsave(&pdata->tstamp_lock, flags); 185 186 nsec = timecounter_read(&pdata->tstamp_tc); 187 188 spin_unlock_irqrestore(&pdata->tstamp_lock, flags); 189 190 *ts = ns_to_timespec64(nsec); 191 192 return (0); 193} 194 195static int xgbe_settime(struct ptp_clock_info *info, 196 const struct timespec64 *ts) 197{ 198 struct xgbe_prv_data *pdata = container_of(info, 199 struct xgbe_prv_data, 200 ptp_clock_info); 201 unsigned long flags; 202 u64 nsec; 203 204 nsec = timespec64_to_ns(ts); 205 206 spin_lock_irqsave(&pdata->tstamp_lock, flags); 207 208 timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, nsec); 209 210 spin_unlock_irqrestore(&pdata->tstamp_lock, flags); 211 212 return (0); 213} 214 215static int xgbe_enable(struct ptp_clock_info *info, 216 void *request, int on) 217{ 218 return (-EOPNOTSUPP); 219} 220 221void xgbe_ptp_register(struct xgbe_prv_data *pdata) 222{ 223 struct ptp_clock_info *info = &pdata->ptp_clock_info; 224 //struct ptp_clock *clock; 225 struct cyclecounter *cc = &pdata->tstamp_cc; 226 u64 dividend; 227 228 snprintf(info->name, sizeof(info->name), "axgbe-ptp"); 229 //info->owner = THIS_MODULE; 230 info->max_adj = pdata->ptpclk_rate; 231 info->adjfreq = xgbe_adjfreq; 232 info->adjtime = xgbe_adjtime; 233 info->gettime64 = xgbe_gettime; 234 info->settime64 = xgbe_settime; 235 info->enable = xgbe_enable; 236#if 0 237 clock = ptp_clock_register(info, pdata->dev); 238 if (IS_ERR(clock)) { 239 dev_err(pdata->dev, "ptp_clock_register failed\n"); 240 return; 241 } 242 243 pdata->ptp_clock = clock; 244#endif 245 /* Calculate the addend: 246 * addend = 2^32 / (PTP ref clock / 50Mhz) 247 * = (2^32 * 50Mhz) / PTP ref clock 248 */ 249 dividend = 50000000; 250 dividend <<= 32; 251 pdata->tstamp_addend = div_u64(dividend, pdata->ptpclk_rate); 252 253 /* Setup the timecounter */ 254 cc->read = xgbe_cc_read; 255 cc->mask = CLOCKSOURCE_MASK(64); 256 cc->mult = 1; 257 cc->shift = 0; 258 259 timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, 260 ktime_to_ns(ktime_get_real())); 261 262 /* Disable all timestamping to start */ 263 XGMAC_IOWRITE(pdata, MAC_TSCR, 0); 264 pdata->tstamp_config.tx_type = HWTSTAMP_TX_OFF; 265 pdata->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE; 266} 267 268void xgbe_ptp_unregister(struct xgbe_prv_data *pdata) 269{ 270#if 0 271 if (pdata->ptp_clock) 272 ptp_clock_unregister(pdata->ptp_clock); 273#endif 274} 275