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23e4eef7 LT |
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 | ||
a5a1d1c2 | 125 | static u64 xgbe_cc_read(const struct cyclecounter *cc) |
23e4eef7 LT |
126 | { |
127 | struct xgbe_prv_data *pdata = container_of(cc, | |
128 | struct xgbe_prv_data, | |
129 | tstamp_cc); | |
130 | u64 nsec; | |
131 | ||
132 | nsec = pdata->hw_if.get_tstamp_time(pdata); | |
133 | ||
134 | return nsec; | |
135 | } | |
136 | ||
137 | static int xgbe_adjfreq(struct ptp_clock_info *info, s32 delta) | |
138 | { | |
139 | struct xgbe_prv_data *pdata = container_of(info, | |
140 | struct xgbe_prv_data, | |
141 | ptp_clock_info); | |
142 | unsigned long flags; | |
143 | u64 adjust; | |
144 | u32 addend, diff; | |
145 | unsigned int neg_adjust = 0; | |
146 | ||
147 | if (delta < 0) { | |
148 | neg_adjust = 1; | |
149 | delta = -delta; | |
150 | } | |
151 | ||
152 | adjust = pdata->tstamp_addend; | |
153 | adjust *= delta; | |
154 | diff = div_u64(adjust, 1000000000UL); | |
155 | ||
156 | addend = (neg_adjust) ? pdata->tstamp_addend - diff : | |
157 | pdata->tstamp_addend + diff; | |
158 | ||
159 | spin_lock_irqsave(&pdata->tstamp_lock, flags); | |
160 | ||
161 | pdata->hw_if.update_tstamp_addend(pdata, addend); | |
162 | ||
163 | spin_unlock_irqrestore(&pdata->tstamp_lock, flags); | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | static int xgbe_adjtime(struct ptp_clock_info *info, s64 delta) | |
169 | { | |
170 | struct xgbe_prv_data *pdata = container_of(info, | |
171 | struct xgbe_prv_data, | |
172 | ptp_clock_info); | |
173 | unsigned long flags; | |
23e4eef7 LT |
174 | |
175 | spin_lock_irqsave(&pdata->tstamp_lock, flags); | |
8b976e97 | 176 | timecounter_adjtime(&pdata->tstamp_tc, delta); |
23e4eef7 LT |
177 | spin_unlock_irqrestore(&pdata->tstamp_lock, flags); |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
15dd95ff | 182 | static int xgbe_gettime(struct ptp_clock_info *info, struct timespec64 *ts) |
23e4eef7 LT |
183 | { |
184 | struct xgbe_prv_data *pdata = container_of(info, | |
185 | struct xgbe_prv_data, | |
186 | ptp_clock_info); | |
187 | unsigned long flags; | |
188 | u64 nsec; | |
189 | ||
190 | spin_lock_irqsave(&pdata->tstamp_lock, flags); | |
191 | ||
192 | nsec = timecounter_read(&pdata->tstamp_tc); | |
193 | ||
194 | spin_unlock_irqrestore(&pdata->tstamp_lock, flags); | |
195 | ||
15dd95ff | 196 | *ts = ns_to_timespec64(nsec); |
23e4eef7 LT |
197 | |
198 | return 0; | |
199 | } | |
200 | ||
15dd95ff RC |
201 | static int xgbe_settime(struct ptp_clock_info *info, |
202 | const struct timespec64 *ts) | |
23e4eef7 LT |
203 | { |
204 | struct xgbe_prv_data *pdata = container_of(info, | |
205 | struct xgbe_prv_data, | |
206 | ptp_clock_info); | |
207 | unsigned long flags; | |
208 | u64 nsec; | |
209 | ||
15dd95ff | 210 | nsec = timespec64_to_ns(ts); |
23e4eef7 LT |
211 | |
212 | spin_lock_irqsave(&pdata->tstamp_lock, flags); | |
213 | ||
214 | timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, nsec); | |
215 | ||
216 | spin_unlock_irqrestore(&pdata->tstamp_lock, flags); | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | static int xgbe_enable(struct ptp_clock_info *info, | |
222 | struct ptp_clock_request *request, int on) | |
223 | { | |
224 | return -EOPNOTSUPP; | |
225 | } | |
226 | ||
227 | void xgbe_ptp_register(struct xgbe_prv_data *pdata) | |
228 | { | |
229 | struct ptp_clock_info *info = &pdata->ptp_clock_info; | |
230 | struct ptp_clock *clock; | |
231 | struct cyclecounter *cc = &pdata->tstamp_cc; | |
232 | u64 dividend; | |
233 | ||
234 | snprintf(info->name, sizeof(info->name), "%s", | |
235 | netdev_name(pdata->netdev)); | |
236 | info->owner = THIS_MODULE; | |
82a19035 | 237 | info->max_adj = pdata->ptpclk_rate; |
23e4eef7 LT |
238 | info->adjfreq = xgbe_adjfreq; |
239 | info->adjtime = xgbe_adjtime; | |
15dd95ff RC |
240 | info->gettime64 = xgbe_gettime; |
241 | info->settime64 = xgbe_settime; | |
23e4eef7 LT |
242 | info->enable = xgbe_enable; |
243 | ||
244 | clock = ptp_clock_register(info, pdata->dev); | |
245 | if (IS_ERR(clock)) { | |
246 | dev_err(pdata->dev, "ptp_clock_register failed\n"); | |
247 | return; | |
248 | } | |
249 | ||
250 | pdata->ptp_clock = clock; | |
251 | ||
252 | /* Calculate the addend: | |
253 | * addend = 2^32 / (PTP ref clock / 50Mhz) | |
254 | * = (2^32 * 50Mhz) / PTP ref clock | |
255 | */ | |
256 | dividend = 50000000; | |
257 | dividend <<= 32; | |
82a19035 | 258 | pdata->tstamp_addend = div_u64(dividend, pdata->ptpclk_rate); |
23e4eef7 LT |
259 | |
260 | /* Setup the timecounter */ | |
261 | cc->read = xgbe_cc_read; | |
262 | cc->mask = CLOCKSOURCE_MASK(64); | |
263 | cc->mult = 1; | |
264 | cc->shift = 0; | |
265 | ||
266 | timecounter_init(&pdata->tstamp_tc, &pdata->tstamp_cc, | |
267 | ktime_to_ns(ktime_get_real())); | |
268 | ||
269 | /* Disable all timestamping to start */ | |
270 | XGMAC_IOWRITE(pdata, MAC_TCR, 0); | |
271 | pdata->tstamp_config.tx_type = HWTSTAMP_TX_OFF; | |
272 | pdata->tstamp_config.rx_filter = HWTSTAMP_FILTER_NONE; | |
273 | } | |
274 | ||
275 | void xgbe_ptp_unregister(struct xgbe_prv_data *pdata) | |
276 | { | |
277 | if (pdata->ptp_clock) | |
278 | ptp_clock_unregister(pdata->ptp_clock); | |
279 | } |