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 */ 116 117 #include <linux/clk.h> 118 #include <linux/clocksource.h> 119 #include <linux/ptp_clock_kernel.h> 120 #include <linux/net_tstamp.h> 121 122 #include "xgbe.h" 123 #include "xgbe-common.h" 124 125 126 static cycle_t xgbe_cc_read(const struct cyclecounter *cc) 127 { 128 struct xgbe_prv_data *pdata = container_of(cc, 129 struct xgbe_prv_data, 130 tstamp_cc); 131 u64 nsec; 132 133 nsec = pdata->hw_if.get_tstamp_time(pdata); 134 135 return nsec; 136 } 137 138 static int xgbe_adjfreq(struct ptp_clock_info *info, s32 delta) 139 { 140 struct xgbe_prv_data *pdata = container_of(info, 141 struct xgbe_prv_data, 142 ptp_clock_info); 143 unsigned long flags; 144 u64 adjust; 145 u32 addend, diff; 146 unsigned int neg_adjust = 0; 147 148 if (delta < 0) { 149 neg_adjust = 1; 150 delta = -delta; 151 } 152 153 adjust = pdata->tstamp_addend; 154 adjust *= delta; 155 diff = div_u64(adjust, 1000000000UL); 156 157 addend = (neg_adjust) ? pdata->tstamp_addend - diff : 158 pdata->tstamp_addend + diff; 159 160 spin_lock_irqsave(&pdata->tstamp_lock, flags); 161 162 pdata->hw_if.update_tstamp_addend(pdata, addend); 163 164 spin_unlock_irqrestore(&pdata->tstamp_lock, flags); 165 166 return 0; 167 } 168 169 static int xgbe_adjtime(struct ptp_clock_info *info, s64 delta) 170 { 171 struct xgbe_prv_data *pdata = container_of(info, 172 struct xgbe_prv_data, 173 ptp_clock_info); 174 unsigned long flags; 175 u64 nsec; 176 177 spin_lock_irqsave(&pdata->tstamp_lock, flags); 178 179 nsec = timecounter_read(&pdata->tstamp_tc); 180 181 nsec += delta; 182 timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, nsec); 183 184 spin_unlock_irqrestore(&pdata->tstamp_lock, flags); 185 186 return 0; 187 } 188 189 static int xgbe_gettime(struct ptp_clock_info *info, struct timespec *ts) 190 { 191 struct xgbe_prv_data *pdata = container_of(info, 192 struct xgbe_prv_data, 193 ptp_clock_info); 194 unsigned long flags; 195 u64 nsec; 196 197 spin_lock_irqsave(&pdata->tstamp_lock, flags); 198 199 nsec = timecounter_read(&pdata->tstamp_tc); 200 201 spin_unlock_irqrestore(&pdata->tstamp_lock, flags); 202 203 *ts = ns_to_timespec(nsec); 204 205 return 0; 206 } 207 208 static int xgbe_settime(struct ptp_clock_info *info, const struct timespec *ts) 209 { 210 struct xgbe_prv_data *pdata = container_of(info, 211 struct xgbe_prv_data, 212 ptp_clock_info); 213 unsigned long flags; 214 u64 nsec; 215 216 nsec = timespec_to_ns(ts); 217 218 spin_lock_irqsave(&pdata->tstamp_lock, flags); 219 220 timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, nsec); 221 222 spin_unlock_irqrestore(&pdata->tstamp_lock, flags); 223 224 return 0; 225 } 226 227 static int xgbe_enable(struct ptp_clock_info *info, 228 struct ptp_clock_request *request, int on) 229 { 230 return -EOPNOTSUPP; 231 } 232 233 void xgbe_ptp_register(struct xgbe_prv_data *pdata) 234 { 235 struct ptp_clock_info *info = &pdata->ptp_clock_info; 236 struct ptp_clock *clock; 237 struct cyclecounter *cc = &pdata->tstamp_cc; 238 u64 dividend; 239 240 snprintf(info->name, sizeof(info->name), "%s", 241 netdev_name(pdata->netdev)); 242 info->owner = THIS_MODULE; 243 info->max_adj = clk_get_rate(pdata->ptpclk); 244 info->adjfreq = xgbe_adjfreq; 245 info->adjtime = xgbe_adjtime; 246 info->gettime = xgbe_gettime; 247 info->settime = xgbe_settime; 248 info->enable = xgbe_enable; 249 250 clock = ptp_clock_register(info, pdata->dev); 251 if (IS_ERR(clock)) { 252 dev_err(pdata->dev, "ptp_clock_register failed\n"); 253 return; 254 } 255 256 pdata->ptp_clock = clock; 257 258 /* Calculate the addend: 259 * addend = 2^32 / (PTP ref clock / 50Mhz) 260 * = (2^32 * 50Mhz) / PTP ref clock 261 */ 262 dividend = 50000000; 263 dividend <<= 32; 264 pdata->tstamp_addend = div_u64(dividend, clk_get_rate(pdata->ptpclk)); 265 266 /* Setup the timecounter */ 267 cc->read = xgbe_cc_read; 268 cc->mask = CLOCKSOURCE_MASK(64); 269 cc->mult = 1; 270 cc->shift = 0; 271 272 timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, 273 ktime_to_ns(ktime_get_real())); 274 275 /* Disable all timestamping to start */ 276 XGMAC_IOWRITE(pdata, MAC_TCR, 0); 277 pdata->tstamp_config.tx_type = HWTSTAMP_TX_OFF; 278 pdata->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE; 279 } 280 281 void xgbe_ptp_unregister(struct xgbe_prv_data *pdata) 282 { 283 if (pdata->ptp_clock) 284 ptp_clock_unregister(pdata->ptp_clock); 285 } 286