^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * PTP 1588 clock support - character device implementation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2010 OMICRON electronics GmbH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/posix-clock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/timekeeping.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/nospec.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "ptp_private.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static int ptp_disable_pinfunc(struct ptp_clock_info *ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) enum ptp_pin_function func, unsigned int chan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct ptp_clock_request rq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) memset(&rq, 0, sizeof(rq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) switch (func) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) case PTP_PF_NONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) case PTP_PF_EXTTS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) rq.type = PTP_CLK_REQ_EXTTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) rq.extts.index = chan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) err = ops->enable(ops, &rq, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) case PTP_PF_PEROUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) rq.type = PTP_CLK_REQ_PEROUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) rq.perout.index = chan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) err = ops->enable(ops, &rq, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) case PTP_PF_PHYSYNC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) enum ptp_pin_function func, unsigned int chan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct ptp_clock_info *info = ptp->info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct ptp_pin_desc *pin1 = NULL, *pin2 = &info->pin_config[pin];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* Check to see if any other pin previously had this function. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) for (i = 0; i < info->n_pins; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (info->pin_config[i].func == func &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) info->pin_config[i].chan == chan) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) pin1 = &info->pin_config[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (pin1 && i == pin)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* Check the desired function and channel. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) switch (func) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) case PTP_PF_NONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) case PTP_PF_EXTTS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (chan >= info->n_ext_ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) case PTP_PF_PEROUT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (chan >= info->n_per_out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) case PTP_PF_PHYSYNC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (chan != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (info->verify(info, pin, func, chan)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) pr_err("driver cannot use function %u on pin %u\n", func, chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /* Disable whatever function was previously assigned. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (pin1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) ptp_disable_pinfunc(info, func, chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) pin1->func = PTP_PF_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) pin1->chan = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) ptp_disable_pinfunc(info, pin2->func, pin2->chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) pin2->func = func;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) pin2->chan = chan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) int ptp_open(struct posix_clock *pc, fmode_t fmode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct ptp_sys_offset_extended *extoff = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct ptp_sys_offset_precise precise_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct system_device_crosststamp xtstamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) struct ptp_clock_info *ops = ptp->info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct ptp_sys_offset *sysoff = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct ptp_system_timestamp sts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct ptp_clock_request req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) struct ptp_clock_caps caps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) struct ptp_clock_time *pct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) unsigned int i, pin_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) struct ptp_pin_desc pd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) struct timespec64 ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) int enable, err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) case PTP_CLOCK_GETCAPS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) case PTP_CLOCK_GETCAPS2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) memset(&caps, 0, sizeof(caps));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) caps.max_adj = ptp->info->max_adj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) caps.n_alarm = ptp->info->n_alarm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) caps.n_ext_ts = ptp->info->n_ext_ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) caps.n_per_out = ptp->info->n_per_out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) caps.pps = ptp->info->pps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) caps.n_pins = ptp->info->n_pins;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) caps.cross_timestamping = ptp->info->getcrosststamp != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) caps.adjust_phase = ptp->info->adjphase != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (copy_to_user((void __user *)arg, &caps, sizeof(caps)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) case PTP_EXTTS_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) case PTP_EXTTS_REQUEST2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) memset(&req, 0, sizeof(req));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) if (copy_from_user(&req.extts, (void __user *)arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) sizeof(req.extts))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (cmd == PTP_EXTTS_REQUEST2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) /* Tell the drivers to check the flags carefully. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) req.extts.flags |= PTP_STRICT_FLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /* Make sure no reserved bit is set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if ((req.extts.flags & ~PTP_EXTTS_VALID_FLAGS) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) req.extts.rsv[0] || req.extts.rsv[1]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /* Ensure one of the rising/falling edge bits is set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) if ((req.extts.flags & PTP_ENABLE_FEATURE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) (req.extts.flags & PTP_EXTTS_EDGES) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) } else if (cmd == PTP_EXTTS_REQUEST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) req.extts.flags &= PTP_EXTTS_V1_VALID_FLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) req.extts.rsv[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) req.extts.rsv[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (req.extts.index >= ops->n_ext_ts) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) req.type = PTP_CLK_REQ_EXTTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) enable = req.extts.flags & PTP_ENABLE_FEATURE ? 1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (mutex_lock_interruptible(&ptp->pincfg_mux))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) err = ops->enable(ops, &req, enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) mutex_unlock(&ptp->pincfg_mux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) case PTP_PEROUT_REQUEST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) case PTP_PEROUT_REQUEST2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) memset(&req, 0, sizeof(req));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (copy_from_user(&req.perout, (void __user *)arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) sizeof(req.perout))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (cmd == PTP_PEROUT_REQUEST2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) struct ptp_perout_request *perout = &req.perout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) if (perout->flags & ~PTP_PEROUT_VALID_FLAGS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) * The "on" field has undefined meaning if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) * PTP_PEROUT_DUTY_CYCLE isn't set, we must still treat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) * it as reserved, which must be set to zero.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (!(perout->flags & PTP_PEROUT_DUTY_CYCLE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) (perout->rsv[0] || perout->rsv[1] ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) perout->rsv[2] || perout->rsv[3])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (perout->flags & PTP_PEROUT_DUTY_CYCLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) /* The duty cycle must be subunitary. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (perout->on.sec > perout->period.sec ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) (perout->on.sec == perout->period.sec &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) perout->on.nsec > perout->period.nsec)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) err = -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (perout->flags & PTP_PEROUT_PHASE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * The phase should be specified modulo the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * period, therefore anything equal or larger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) * than 1 period is invalid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if (perout->phase.sec > perout->period.sec ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) (perout->phase.sec == perout->period.sec &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) perout->phase.nsec >= perout->period.nsec)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) err = -ERANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) } else if (cmd == PTP_PEROUT_REQUEST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) req.perout.flags &= PTP_PEROUT_V1_VALID_FLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) req.perout.rsv[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) req.perout.rsv[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) req.perout.rsv[2] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) req.perout.rsv[3] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (req.perout.index >= ops->n_per_out) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) req.type = PTP_CLK_REQ_PEROUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) enable = req.perout.period.sec || req.perout.period.nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (mutex_lock_interruptible(&ptp->pincfg_mux))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) err = ops->enable(ops, &req, enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) mutex_unlock(&ptp->pincfg_mux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) case PTP_ENABLE_PPS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) case PTP_ENABLE_PPS2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) memset(&req, 0, sizeof(req));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) if (!capable(CAP_SYS_TIME))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) req.type = PTP_CLK_REQ_PPS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) enable = arg ? 1 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) if (mutex_lock_interruptible(&ptp->pincfg_mux))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) err = ops->enable(ops, &req, enable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) mutex_unlock(&ptp->pincfg_mux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) case PTP_SYS_OFFSET_PRECISE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) case PTP_SYS_OFFSET_PRECISE2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (!ptp->info->getcrosststamp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) err = ptp->info->getcrosststamp(ptp->info, &xtstamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) memset(&precise_offset, 0, sizeof(precise_offset));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) ts = ktime_to_timespec64(xtstamp.device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) precise_offset.device.sec = ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) precise_offset.device.nsec = ts.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) ts = ktime_to_timespec64(xtstamp.sys_realtime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) precise_offset.sys_realtime.sec = ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) precise_offset.sys_realtime.nsec = ts.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) ts = ktime_to_timespec64(xtstamp.sys_monoraw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) precise_offset.sys_monoraw.sec = ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) precise_offset.sys_monoraw.nsec = ts.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (copy_to_user((void __user *)arg, &precise_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) sizeof(precise_offset)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) case PTP_SYS_OFFSET_EXTENDED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) case PTP_SYS_OFFSET_EXTENDED2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) if (!ptp->info->gettimex64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) err = -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) extoff = memdup_user((void __user *)arg, sizeof(*extoff));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) if (IS_ERR(extoff)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) err = PTR_ERR(extoff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) extoff = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if (extoff->n_samples > PTP_MAX_SAMPLES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) || extoff->rsv[0] || extoff->rsv[1] || extoff->rsv[2]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) for (i = 0; i < extoff->n_samples; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) err = ptp->info->gettimex64(ptp->info, &ts, &sts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) extoff->ts[i][0].sec = sts.pre_ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) extoff->ts[i][0].nsec = sts.pre_ts.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) extoff->ts[i][1].sec = ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) extoff->ts[i][1].nsec = ts.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) extoff->ts[i][2].sec = sts.post_ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) extoff->ts[i][2].nsec = sts.post_ts.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) if (copy_to_user((void __user *)arg, extoff, sizeof(*extoff)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) case PTP_SYS_OFFSET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) case PTP_SYS_OFFSET2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) sysoff = memdup_user((void __user *)arg, sizeof(*sysoff));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (IS_ERR(sysoff)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) err = PTR_ERR(sysoff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) sysoff = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (sysoff->n_samples > PTP_MAX_SAMPLES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) pct = &sysoff->ts[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) for (i = 0; i < sysoff->n_samples; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) ktime_get_real_ts64(&ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) pct->sec = ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) pct->nsec = ts.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) pct++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (ops->gettimex64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) err = ops->gettimex64(ops, &ts, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) err = ops->gettime64(ops, &ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) pct->sec = ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) pct->nsec = ts.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) pct++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) ktime_get_real_ts64(&ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) pct->sec = ts.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) pct->nsec = ts.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) if (copy_to_user((void __user *)arg, sysoff, sizeof(*sysoff)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) case PTP_PIN_GETFUNC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) case PTP_PIN_GETFUNC2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) if ((pd.rsv[0] || pd.rsv[1] || pd.rsv[2]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) || pd.rsv[3] || pd.rsv[4])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) && cmd == PTP_PIN_GETFUNC2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) } else if (cmd == PTP_PIN_GETFUNC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) pd.rsv[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) pd.rsv[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) pd.rsv[2] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) pd.rsv[3] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) pd.rsv[4] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) pin_index = pd.index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (pin_index >= ops->n_pins) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) pin_index = array_index_nospec(pin_index, ops->n_pins);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (mutex_lock_interruptible(&ptp->pincfg_mux))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) pd = ops->pin_config[pin_index];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) mutex_unlock(&ptp->pincfg_mux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) if (!err && copy_to_user((void __user *)arg, &pd, sizeof(pd)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) case PTP_PIN_SETFUNC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) case PTP_PIN_SETFUNC2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) if ((pd.rsv[0] || pd.rsv[1] || pd.rsv[2]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) || pd.rsv[3] || pd.rsv[4])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) && cmd == PTP_PIN_SETFUNC2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) } else if (cmd == PTP_PIN_SETFUNC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) pd.rsv[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) pd.rsv[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) pd.rsv[2] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) pd.rsv[3] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) pd.rsv[4] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) pin_index = pd.index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (pin_index >= ops->n_pins) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) pin_index = array_index_nospec(pin_index, ops->n_pins);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) if (mutex_lock_interruptible(&ptp->pincfg_mux))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) err = ptp_set_pinfunc(ptp, pin_index, pd.func, pd.chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) mutex_unlock(&ptp->pincfg_mux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) err = -ENOTTY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) kfree(extoff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) kfree(sysoff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) __poll_t ptp_poll(struct posix_clock *pc, struct file *fp, poll_table *wait)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) poll_wait(fp, &ptp->tsev_wq, wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) return queue_cnt(&ptp->tsevq) ? EPOLLIN : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) #define EXTTS_BUFSIZE (PTP_BUF_TIMESTAMPS * sizeof(struct ptp_extts_event))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) ssize_t ptp_read(struct posix_clock *pc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) uint rdflags, char __user *buf, size_t cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) struct timestamp_event_queue *queue = &ptp->tsevq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) struct ptp_extts_event *event;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) size_t qcnt, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) int result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (cnt % sizeof(struct ptp_extts_event) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if (cnt > EXTTS_BUFSIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) cnt = EXTTS_BUFSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) cnt = cnt / sizeof(struct ptp_extts_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) if (mutex_lock_interruptible(&ptp->tsevq_mux))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) if (wait_event_interruptible(ptp->tsev_wq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) ptp->defunct || queue_cnt(queue))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) mutex_unlock(&ptp->tsevq_mux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return -ERESTARTSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (ptp->defunct) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) mutex_unlock(&ptp->tsevq_mux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) event = kmalloc(EXTTS_BUFSIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) if (!event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) mutex_unlock(&ptp->tsevq_mux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) spin_lock_irqsave(&queue->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) qcnt = queue_cnt(queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) if (cnt > qcnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) cnt = qcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) for (i = 0; i < cnt; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) event[i] = queue->buf[queue->head];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) queue->head = (queue->head + 1) % PTP_MAX_TIMESTAMPS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) spin_unlock_irqrestore(&queue->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) cnt = cnt * sizeof(struct ptp_extts_event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) mutex_unlock(&ptp->tsevq_mux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) result = cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (copy_to_user(buf, event, cnt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) result = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) kfree(event);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags