void debug_timestamp(char *msg) { struct timespec64 t; getnstimeofday64(&t); pr_debug("**%s: %lld.%9.9ld\n", msg, (long long) t.tv_sec, t.tv_nsec); }
long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg) { struct ptp_clock_caps caps; struct ptp_clock_request req; struct ptp_sys_offset *sysoff = NULL; struct ptp_sys_offset_precise precise_offset; struct ptp_pin_desc pd; struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock); struct ptp_clock_info *ops = ptp->info; struct ptp_clock_time *pct; struct timespec64 ts; struct system_device_crosststamp xtstamp; int enable, err = 0; unsigned int i, pin_index; switch (cmd) { case PTP_CLOCK_GETCAPS: memset(&caps, 0, sizeof(caps)); caps.max_adj = ptp->info->max_adj; caps.n_alarm = ptp->info->n_alarm; caps.n_ext_ts = ptp->info->n_ext_ts; caps.n_per_out = ptp->info->n_per_out; caps.pps = ptp->info->pps; caps.n_pins = ptp->info->n_pins; caps.cross_timestamping = ptp->info->getcrosststamp != NULL; if (copy_to_user((void __user *)arg, &caps, sizeof(caps))) err = -EFAULT; break; case PTP_EXTTS_REQUEST: if (copy_from_user(&req.extts, (void __user *)arg, sizeof(req.extts))) { err = -EFAULT; break; } if (req.extts.index >= ops->n_ext_ts) { err = -EINVAL; break; } req.type = PTP_CLK_REQ_EXTTS; enable = req.extts.flags & PTP_ENABLE_FEATURE ? 1 : 0; err = ops->enable(ops, &req, enable); break; case PTP_PEROUT_REQUEST: if (copy_from_user(&req.perout, (void __user *)arg, sizeof(req.perout))) { err = -EFAULT; break; } if (req.perout.index >= ops->n_per_out) { err = -EINVAL; break; } req.type = PTP_CLK_REQ_PEROUT; enable = req.perout.period.sec || req.perout.period.nsec; err = ops->enable(ops, &req, enable); break; case PTP_ENABLE_PPS: if (!capable(CAP_SYS_TIME)) return -EPERM; req.type = PTP_CLK_REQ_PPS; enable = arg ? 1 : 0; err = ops->enable(ops, &req, enable); break; case PTP_SYS_OFFSET_PRECISE: if (!ptp->info->getcrosststamp) { err = -EOPNOTSUPP; break; } err = ptp->info->getcrosststamp(ptp->info, &xtstamp); if (err) break; ts = ktime_to_timespec64(xtstamp.device); precise_offset.device.sec = ts.tv_sec; precise_offset.device.nsec = ts.tv_nsec; ts = ktime_to_timespec64(xtstamp.sys_realtime); precise_offset.sys_realtime.sec = ts.tv_sec; precise_offset.sys_realtime.nsec = ts.tv_nsec; ts = ktime_to_timespec64(xtstamp.sys_monoraw); precise_offset.sys_monoraw.sec = ts.tv_sec; precise_offset.sys_monoraw.nsec = ts.tv_nsec; if (copy_to_user((void __user *)arg, &precise_offset, sizeof(precise_offset))) err = -EFAULT; break; case PTP_SYS_OFFSET: sysoff = memdup_user((void __user *)arg, sizeof(*sysoff)); if (IS_ERR(sysoff)) { err = PTR_ERR(sysoff); sysoff = NULL; break; } if (sysoff->n_samples > PTP_MAX_SAMPLES) { err = -EINVAL; break; } pct = &sysoff->ts[0]; for (i = 0; i < sysoff->n_samples; i++) { getnstimeofday64(&ts); pct->sec = ts.tv_sec; pct->nsec = ts.tv_nsec; pct++; ptp->info->gettime64(ptp->info, &ts); pct->sec = ts.tv_sec; pct->nsec = ts.tv_nsec; pct++; } getnstimeofday64(&ts); pct->sec = ts.tv_sec; pct->nsec = ts.tv_nsec; if (copy_to_user((void __user *)arg, sysoff, sizeof(*sysoff))) err = -EFAULT; break; case PTP_PIN_GETFUNC: if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) { err = -EFAULT; break; } pin_index = pd.index; if (pin_index >= ops->n_pins) { err = -EINVAL; break; } if (mutex_lock_interruptible(&ptp->pincfg_mux)) return -ERESTARTSYS; pd = ops->pin_config[pin_index]; mutex_unlock(&ptp->pincfg_mux); if (!err && copy_to_user((void __user *)arg, &pd, sizeof(pd))) err = -EFAULT; break; case PTP_PIN_SETFUNC: if (copy_from_user(&pd, (void __user *)arg, sizeof(pd))) { err = -EFAULT; break; } pin_index = pd.index; if (pin_index >= ops->n_pins) { err = -EINVAL; break; } if (mutex_lock_interruptible(&ptp->pincfg_mux)) return -ERESTARTSYS; err = ptp_set_pinfunc(ptp, pin_index, pd.func, pd.chan); mutex_unlock(&ptp->pincfg_mux); break; default: err = -ENOTTY; break; } kfree(sysoff); return err; }