[linux-block.git] / drivers / ptp / ptp_sysfs.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * PTP 1588 clock support - sysfs interface.
 *
 * Copyright (C) 2010 OMICRON electronics GmbH
 * Copyright 2021 NXP
 */
#include <linux/capability.h>
#include <linux/slab.h>

#include "ptp_private.h"

static ssize_t clock_name_show(struct device *dev,
			       struct device_attribute *attr, char *page)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	return sysfs_emit(page, "%s\n", ptp->info->name);
}
static DEVICE_ATTR_RO(clock_name);

static ssize_t max_phase_adjustment_show(struct device *dev,
					 struct device_attribute *attr,
					 char *page)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);

	return snprintf(page, PAGE_SIZE - 1, "%d\n",
			ptp->info->getmaxphase(ptp->info));
}
static DEVICE_ATTR_RO(max_phase_adjustment);

#define PTP_SHOW_INT(name, var)						\
static ssize_t var##_show(struct device *dev,				\
			   struct device_attribute *attr, char *page)	\
{									\
	struct ptp_clock *ptp = dev_get_drvdata(dev);			\
	return snprintf(page, PAGE_SIZE-1, "%d\n", ptp->info->var);	\
}									\
static DEVICE_ATTR(name, 0444, var##_show, NULL);

PTP_SHOW_INT(max_adjustment, max_adj);
PTP_SHOW_INT(n_alarms, n_alarm);
PTP_SHOW_INT(n_external_timestamps, n_ext_ts);
PTP_SHOW_INT(n_periodic_outputs, n_per_out);
PTP_SHOW_INT(n_programmable_pins, n_pins);
PTP_SHOW_INT(pps_available, pps);

static ssize_t extts_enable_store(struct device *dev,
				  struct device_attribute *attr,
				  const char *buf, size_t count)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	struct ptp_clock_info *ops = ptp->info;
	struct ptp_clock_request req = { .type = PTP_CLK_REQ_EXTTS };
	int cnt, enable;
	int err = -EINVAL;

	cnt = sscanf(buf, "%u %d", &req.extts.index, &enable);
	if (cnt != 2)
		goto out;
	if (req.extts.index >= ops->n_ext_ts)
		goto out;

	err = ops->enable(ops, &req, enable ? 1 : 0);
	if (err)
		goto out;

	return count;
out:
	return err;
}
static DEVICE_ATTR(extts_enable, 0220, NULL, extts_enable_store);

static ssize_t extts_fifo_show(struct device *dev,
			       struct device_attribute *attr, char *page)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	struct timestamp_event_queue *queue = &ptp->tsevq;
	struct ptp_extts_event event;
	unsigned long flags;
	size_t qcnt;
	int cnt = 0;

	memset(&event, 0, sizeof(event));

	if (mutex_lock_interruptible(&ptp->tsevq_mux))
		return -ERESTARTSYS;

	spin_lock_irqsave(&queue->lock, flags);
	qcnt = queue_cnt(queue);
	if (qcnt) {
		event = queue->buf[queue->head];
		queue->head = (queue->head + 1) % PTP_MAX_TIMESTAMPS;
	}
	spin_unlock_irqrestore(&queue->lock, flags);

	if (!qcnt)
		goto out;

	cnt = snprintf(page, PAGE_SIZE, "%u %lld %u\n",
		       event.index, event.t.sec, event.t.nsec);
out:
	mutex_unlock(&ptp->tsevq_mux);
	return cnt;
}
static DEVICE_ATTR(fifo, 0444, extts_fifo_show, NULL);

static ssize_t period_store(struct device *dev,
			    struct device_attribute *attr,
			    const char *buf, size_t count)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	struct ptp_clock_info *ops = ptp->info;
	struct ptp_clock_request req = { .type = PTP_CLK_REQ_PEROUT };
	int cnt, enable, err = -EINVAL;

	cnt = sscanf(buf, "%u %lld %u %lld %u", &req.perout.index,
		     &req.perout.start.sec, &req.perout.start.nsec,
		     &req.perout.period.sec, &req.perout.period.nsec);
	if (cnt != 5)
		goto out;
	if (req.perout.index >= ops->n_per_out)
		goto out;

	enable = req.perout.period.sec || req.perout.period.nsec;
	err = ops->enable(ops, &req, enable);
	if (err)
		goto out;

	return count;
out:
	return err;
}
static DEVICE_ATTR(period, 0220, NULL, period_store);

static ssize_t pps_enable_store(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	struct ptp_clock_info *ops = ptp->info;
	struct ptp_clock_request req = { .type = PTP_CLK_REQ_PPS };
	int cnt, enable;
	int err = -EINVAL;

	if (!capable(CAP_SYS_TIME))
		return -EPERM;

	cnt = sscanf(buf, "%d", &enable);
	if (cnt != 1)
		goto out;

	err = ops->enable(ops, &req, enable ? 1 : 0);
	if (err)
		goto out;

	return count;
out:
	return err;
}
static DEVICE_ATTR(pps_enable, 0220, NULL, pps_enable_store);

static int unregister_vclock(struct device *dev, void *data)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	struct ptp_clock_info *info = ptp->info;
	struct ptp_vclock *vclock;
	u32 *num = data;

	vclock = info_to_vclock(info);
	dev_info(dev->parent, "delete virtual clock ptp%d\n",
		 vclock->clock->index);

	ptp_vclock_unregister(vclock);
	(*num)--;

	/* For break. Not error. */
	if (*num == 0)
		return -EINVAL;

	return 0;
}

static ssize_t n_vclocks_show(struct device *dev,
			      struct device_attribute *attr, char *page)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	ssize_t size;

	if (mutex_lock_interruptible(&ptp->n_vclocks_mux))
		return -ERESTARTSYS;

	size = snprintf(page, PAGE_SIZE - 1, "%u\n", ptp->n_vclocks);

	mutex_unlock(&ptp->n_vclocks_mux);

	return size;
}

static ssize_t n_vclocks_store(struct device *dev,
			       struct device_attribute *attr,
			       const char *buf, size_t count)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	struct ptp_vclock *vclock;
	int err = -EINVAL;
	u32 num, i;

	if (kstrtou32(buf, 0, &num))
		return err;

	if (mutex_lock_interruptible(&ptp->n_vclocks_mux))
		return -ERESTARTSYS;

	if (num > ptp->max_vclocks) {
		dev_err(dev, "max value is %d\n", ptp->max_vclocks);
		goto out;
	}

	/* Need to create more vclocks */
	if (num > ptp->n_vclocks) {
		for (i = 0; i < num - ptp->n_vclocks; i++) {
			vclock = ptp_vclock_register(ptp);
			if (!vclock)
				goto out;

			*(ptp->vclock_index + ptp->n_vclocks + i) =
				vclock->clock->index;

			dev_info(dev, "new virtual clock ptp%d\n",
				 vclock->clock->index);
		}
	}

	/* Need to delete vclocks */
	if (num < ptp->n_vclocks) {
		i = ptp->n_vclocks - num;
		device_for_each_child_reverse(dev, &i,
					      unregister_vclock);

		for (i = 1; i <= ptp->n_vclocks - num; i++)
			*(ptp->vclock_index + ptp->n_vclocks - i) = -1;
	}

	/* Need to inform about changed physical clock behavior */
	if (!ptp->has_cycles) {
		if (num == 0)
			dev_info(dev, "only physical clock in use now\n");
		else
			dev_info(dev, "guarantee physical clock free running\n");
	}

	ptp->n_vclocks = num;
	mutex_unlock(&ptp->n_vclocks_mux);

	return count;
out:
	mutex_unlock(&ptp->n_vclocks_mux);
	return err;
}
static DEVICE_ATTR_RW(n_vclocks);

static ssize_t max_vclocks_show(struct device *dev,
				struct device_attribute *attr, char *page)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	ssize_t size;

	size = snprintf(page, PAGE_SIZE - 1, "%u\n", ptp->max_vclocks);

	return size;
}

static ssize_t max_vclocks_store(struct device *dev,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	unsigned int *vclock_index;
	int err = -EINVAL;
	size_t size;
	u32 max;

	if (kstrtou32(buf, 0, &max) || max == 0)
		return -EINVAL;

	if (max == ptp->max_vclocks)
		return count;

	if (mutex_lock_interruptible(&ptp->n_vclocks_mux))
		return -ERESTARTSYS;

	if (max < ptp->n_vclocks)
		goto out;

	size = sizeof(int) * max;
	vclock_index = kzalloc(size, GFP_KERNEL);
	if (!vclock_index) {
		err = -ENOMEM;
		goto out;
	}

	size = sizeof(int) * ptp->n_vclocks;
	memcpy(vclock_index, ptp->vclock_index, size);

	kfree(ptp->vclock_index);
	ptp->vclock_index = vclock_index;
	ptp->max_vclocks = max;

	mutex_unlock(&ptp->n_vclocks_mux);

	return count;
out:
	mutex_unlock(&ptp->n_vclocks_mux);
	return err;
}
static DEVICE_ATTR_RW(max_vclocks);

static struct attribute *ptp_attrs[] = {
	&dev_attr_clock_name.attr,

	&dev_attr_max_adjustment.attr,
	&dev_attr_max_phase_adjustment.attr,
	&dev_attr_n_alarms.attr,
	&dev_attr_n_external_timestamps.attr,
	&dev_attr_n_periodic_outputs.attr,
	&dev_attr_n_programmable_pins.attr,
	&dev_attr_pps_available.attr,

	&dev_attr_extts_enable.attr,
	&dev_attr_fifo.attr,
	&dev_attr_period.attr,
	&dev_attr_pps_enable.attr,
	&dev_attr_n_vclocks.attr,
	&dev_attr_max_vclocks.attr,
	NULL
};

static umode_t ptp_is_attribute_visible(struct kobject *kobj,
					struct attribute *attr, int n)
{
	struct device *dev = kobj_to_dev(kobj);
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	struct ptp_clock_info *info = ptp->info;
	umode_t mode = attr->mode;

	if (attr == &dev_attr_extts_enable.attr ||
	    attr == &dev_attr_fifo.attr) {
		if (!info->n_ext_ts)
			mode = 0;
	} else if (attr == &dev_attr_period.attr) {
		if (!info->n_per_out)
			mode = 0;
	} else if (attr == &dev_attr_pps_enable.attr) {
		if (!info->pps)
			mode = 0;
	} else if (attr == &dev_attr_n_vclocks.attr ||
		   attr == &dev_attr_max_vclocks.attr) {
		if (ptp->is_virtual_clock)
			mode = 0;
	} else if (attr == &dev_attr_max_phase_adjustment.attr) {
		if (!info->adjphase || !info->getmaxphase)
			mode = 0;
	}

	return mode;
}

static const struct attribute_group ptp_group = {
	.is_visible	= ptp_is_attribute_visible,
	.attrs		= ptp_attrs,
};

const struct attribute_group *ptp_groups[] = {
	&ptp_group,
	NULL
};

static int ptp_pin_name2index(struct ptp_clock *ptp, const char *name)
{
	int i;
	for (i = 0; i < ptp->info->n_pins; i++) {
		if (!strcmp(ptp->info->pin_config[i].name, name))
			return i;
	}
	return -1;
}

static ssize_t ptp_pin_show(struct device *dev, struct device_attribute *attr,
			    char *page)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	unsigned int func, chan;
	int index;

	index = ptp_pin_name2index(ptp, attr->attr.name);
	if (index < 0)
		return -EINVAL;

	if (mutex_lock_interruptible(&ptp->pincfg_mux))
		return -ERESTARTSYS;

	func = ptp->info->pin_config[index].func;
	chan = ptp->info->pin_config[index].chan;

	mutex_unlock(&ptp->pincfg_mux);

	return sysfs_emit(page, "%u %u\n", func, chan);
}

static ssize_t ptp_pin_store(struct device *dev, struct device_attribute *attr,
			     const char *buf, size_t count)
{
	struct ptp_clock *ptp = dev_get_drvdata(dev);
	unsigned int func, chan;
	int cnt, err, index;

	cnt = sscanf(buf, "%u %u", &func, &chan);
	if (cnt != 2)
		return -EINVAL;

	index = ptp_pin_name2index(ptp, attr->attr.name);
	if (index < 0)
		return -EINVAL;

	if (mutex_lock_interruptible(&ptp->pincfg_mux))
		return -ERESTARTSYS;
	err = ptp_set_pinfunc(ptp, index, func, chan);
	mutex_unlock(&ptp->pincfg_mux);
	if (err)
		return err;

	return count;
}

int ptp_populate_pin_groups(struct ptp_clock *ptp)
{
	struct ptp_clock_info *info = ptp->info;
	int err = -ENOMEM, i, n_pins = info->n_pins;

	if (!n_pins)
		return 0;

	ptp->pin_dev_attr = kcalloc(n_pins, sizeof(*ptp->pin_dev_attr),
				    GFP_KERNEL);
	if (!ptp->pin_dev_attr)
		goto no_dev_attr;

	ptp->pin_attr = kcalloc(1 + n_pins, sizeof(*ptp->pin_attr), GFP_KERNEL);
	if (!ptp->pin_attr)
		goto no_pin_attr;

	for (i = 0; i < n_pins; i++) {
		struct device_attribute *da = &ptp->pin_dev_attr[i];
		sysfs_attr_init(&da->attr);
		da->attr.name = info->pin_config[i].name;
		da->attr.mode = 0644;
		da->show = ptp_pin_show;
		da->store = ptp_pin_store;
		ptp->pin_attr[i] = &da->attr;
	}

	ptp->pin_attr_group.name = "pins";
	ptp->pin_attr_group.attrs = ptp->pin_attr;

	ptp->pin_attr_groups[0] = &ptp->pin_attr_group;

	return 0;

no_pin_attr:
	kfree(ptp->pin_dev_attr);
no_dev_attr:
	return err;
}

void ptp_cleanup_pin_groups(struct ptp_clock *ptp)
{
	kfree(ptp->pin_attr);
	kfree(ptp->pin_dev_attr);
}
Commit	Line	Data
74ba9207	1	// SPDX-License-Identifier: GPL-2.0-or-later
d94ba80e RC	2	/*
	3	* PTP 1588 clock support - sysfs interface.
	4	*
	5	* Copyright (C) 2010 OMICRON electronics GmbH
73f37068	6	* Copyright 2021 NXP
d94ba80e RC	7	*/
d94ba80e RC	8	#include <linux/capability.h>
653104d1	9	#include <linux/slab.h>
d94ba80e RC	10
	11	#include "ptp_private.h"
	12
	13	static ssize_t clock_name_show(struct device *dev,
	14	struct device_attribute attr, char page)
	15	{
	16	struct ptp_clock *ptp = dev_get_drvdata(dev);
e2cf0765	17	return sysfs_emit(page, "%s\n", ptp->info->name);
d94ba80e	18	}
63215705	19	static DEVICE_ATTR_RO(clock_name);
d94ba80e	20
c3b60ab7 RR	21	static ssize_t max_phase_adjustment_show(struct device *dev,
	22	struct device_attribute *attr,
	23	char *page)
	24	{
	25	struct ptp_clock *ptp = dev_get_drvdata(dev);
	26
	27	return snprintf(page, PAGE_SIZE - 1, "%d\n",
	28	ptp->info->getmaxphase(ptp->info));
	29	}
	30	static DEVICE_ATTR_RO(max_phase_adjustment);
	31
3499116b GKH	32	#define PTP_SHOW_INT(name, var) \
3499116b GKH	33	static ssize_t var##_show(struct device *dev, \
d94ba80e RC	34	struct device_attribute attr, char page) \
	35	{ \
	36	struct ptp_clock *ptp = dev_get_drvdata(dev); \
3499116b GKH	37	return snprintf(page, PAGE_SIZE-1, "%d\n", ptp->info->var); \
	38	} \
	39	static DEVICE_ATTR(name, 0444, var##_show, NULL);
d94ba80e	40
3499116b GKH	41	PTP_SHOW_INT(max_adjustment, max_adj);
	42	PTP_SHOW_INT(n_alarms, n_alarm);
	43	PTP_SHOW_INT(n_external_timestamps, n_ext_ts);
	44	PTP_SHOW_INT(n_periodic_outputs, n_per_out);
653104d1	45	PTP_SHOW_INT(n_programmable_pins, n_pins);
3499116b	46	PTP_SHOW_INT(pps_available, pps);
d94ba80e	47
d94ba80e RC	48	static ssize_t extts_enable_store(struct device *dev,
	49	struct device_attribute *attr,
	50	const char *buf, size_t count)
	51	{
	52	struct ptp_clock *ptp = dev_get_drvdata(dev);
	53	struct ptp_clock_info *ops = ptp->info;
	54	struct ptp_clock_request req = { .type = PTP_CLK_REQ_EXTTS };
	55	int cnt, enable;
	56	int err = -EINVAL;
	57
	58	cnt = sscanf(buf, "%u %d", &req.extts.index, &enable);
	59	if (cnt != 2)
	60	goto out;
	61	if (req.extts.index >= ops->n_ext_ts)
	62	goto out;
	63
	64	err = ops->enable(ops, &req, enable ? 1 : 0);
	65	if (err)
	66	goto out;
	67
	68	return count;
	69	out:
	70	return err;
	71	}
af59e717	72	static DEVICE_ATTR(extts_enable, 0220, NULL, extts_enable_store);
d94ba80e RC	73
	74	static ssize_t extts_fifo_show(struct device *dev,
	75	struct device_attribute attr, char page)
	76	{
	77	struct ptp_clock *ptp = dev_get_drvdata(dev);
	78	struct timestamp_event_queue *queue = &ptp->tsevq;
	79	struct ptp_extts_event event;
	80	unsigned long flags;
	81	size_t qcnt;
	82	int cnt = 0;
	83
	84	memset(&event, 0, sizeof(event));
	85
	86	if (mutex_lock_interruptible(&ptp->tsevq_mux))
	87	return -ERESTARTSYS;
	88
	89	spin_lock_irqsave(&queue->lock, flags);
	90	qcnt = queue_cnt(queue);
	91	if (qcnt) {
	92	event = queue->buf[queue->head];
	93	queue->head = (queue->head + 1) % PTP_MAX_TIMESTAMPS;
	94	}
	95	spin_unlock_irqrestore(&queue->lock, flags);
	96
	97	if (!qcnt)
	98	goto out;
	99
	100	cnt = snprintf(page, PAGE_SIZE, "%u %lld %u\n",
	101	event.index, event.t.sec, event.t.nsec);
	102	out:
	103	mutex_unlock(&ptp->tsevq_mux);
	104	return cnt;
	105	}
af59e717	106	static DEVICE_ATTR(fifo, 0444, extts_fifo_show, NULL);
d94ba80e RC	107
	108	static ssize_t period_store(struct device *dev,
	109	struct device_attribute *attr,
	110	const char *buf, size_t count)
	111	{
	112	struct ptp_clock *ptp = dev_get_drvdata(dev);
	113	struct ptp_clock_info *ops = ptp->info;
	114	struct ptp_clock_request req = { .type = PTP_CLK_REQ_PEROUT };
	115	int cnt, enable, err = -EINVAL;
	116
	117	cnt = sscanf(buf, "%u %lld %u %lld %u", &req.perout.index,
	118	&req.perout.start.sec, &req.perout.start.nsec,
	119	&req.perout.period.sec, &req.perout.period.nsec);
	120	if (cnt != 5)
	121	goto out;
	122	if (req.perout.index >= ops->n_per_out)
	123	goto out;
	124
	125	enable = req.perout.period.sec \|\| req.perout.period.nsec;
	126	err = ops->enable(ops, &req, enable);
	127	if (err)
	128	goto out;
	129
	130	return count;
	131	out:
	132	return err;
	133	}
af59e717	134	static DEVICE_ATTR(period, 0220, NULL, period_store);
d94ba80e RC	135
	136	static ssize_t pps_enable_store(struct device *dev,
	137	struct device_attribute *attr,
	138	const char *buf, size_t count)
	139	{
	140	struct ptp_clock *ptp = dev_get_drvdata(dev);
	141	struct ptp_clock_info *ops = ptp->info;
	142	struct ptp_clock_request req = { .type = PTP_CLK_REQ_PPS };
	143	int cnt, enable;
	144	int err = -EINVAL;
	145
	146	if (!capable(CAP_SYS_TIME))
	147	return -EPERM;
	148
	149	cnt = sscanf(buf, "%d", &enable);
	150	if (cnt != 1)
	151	goto out;
	152
	153	err = ops->enable(ops, &req, enable ? 1 : 0);
	154	if (err)
	155	goto out;
	156
	157	return count;
	158	out:
	159	return err;
	160	}
af59e717 DT	161	static DEVICE_ATTR(pps_enable, 0220, NULL, pps_enable_store);
af59e717 DT	162
73f37068 YL	163	static int unregister_vclock(struct device dev, void data)
	164	{
	165	struct ptp_clock *ptp = dev_get_drvdata(dev);
	166	struct ptp_clock_info *info = ptp->info;
	167	struct ptp_vclock *vclock;
d329e41a	168	u32 *num = data;
73f37068 YL	169
	170	vclock = info_to_vclock(info);
	171	dev_info(dev->parent, "delete virtual clock ptp%d\n",
	172	vclock->clock->index);
	173
	174	ptp_vclock_unregister(vclock);
	175	(*num)--;
	176
	177	/* For break. Not error. */
	178	if (*num == 0)
	179	return -EINVAL;
	180
	181	return 0;
	182	}
	183
	184	static ssize_t n_vclocks_show(struct device *dev,
	185	struct device_attribute attr, char page)
	186	{
	187	struct ptp_clock *ptp = dev_get_drvdata(dev);
	188	ssize_t size;
	189
	190	if (mutex_lock_interruptible(&ptp->n_vclocks_mux))
	191	return -ERESTARTSYS;
	192
f6a175cf	193	size = snprintf(page, PAGE_SIZE - 1, "%u\n", ptp->n_vclocks);
73f37068 YL	194
	195	mutex_unlock(&ptp->n_vclocks_mux);
	196
	197	return size;
	198	}
	199
	200	static ssize_t n_vclocks_store(struct device *dev,
	201	struct device_attribute *attr,
	202	const char *buf, size_t count)
	203	{
	204	struct ptp_clock *ptp = dev_get_drvdata(dev);
	205	struct ptp_vclock *vclock;
	206	int err = -EINVAL;
	207	u32 num, i;
	208
	209	if (kstrtou32(buf, 0, &num))
	210	return err;
	211
	212	if (mutex_lock_interruptible(&ptp->n_vclocks_mux))
	213	return -ERESTARTSYS;
	214
	215	if (num > ptp->max_vclocks) {
	216	dev_err(dev, "max value is %d\n", ptp->max_vclocks);
	217	goto out;
	218	}
	219
	220	/* Need to create more vclocks */
	221	if (num > ptp->n_vclocks) {
	222	for (i = 0; i < num - ptp->n_vclocks; i++) {
	223	vclock = ptp_vclock_register(ptp);
	224	if (!vclock)
	225	goto out;
	226
44c494c8 YL	227	*(ptp->vclock_index + ptp->n_vclocks + i) =
	228	vclock->clock->index;
	229
73f37068 YL	230	dev_info(dev, "new virtual clock ptp%d\n",
	231	vclock->clock->index);
	232	}
	233	}
	234
	235	/* Need to delete vclocks */
	236	if (num < ptp->n_vclocks) {
	237	i = ptp->n_vclocks - num;
	238	device_for_each_child_reverse(dev, &i,
	239	unregister_vclock);
44c494c8 YL	240
	241	for (i = 1; i <= ptp->n_vclocks - num; i++)
	242	*(ptp->vclock_index + ptp->n_vclocks - i) = -1;
73f37068 YL	243	}
73f37068 YL	244
42704b26 GE	245	/* Need to inform about changed physical clock behavior */
	246	if (!ptp->has_cycles) {
	247	if (num == 0)
	248	dev_info(dev, "only physical clock in use now\n");
	249	else
	250	dev_info(dev, "guarantee physical clock free running\n");
	251	}
73f37068 YL	252
	253	ptp->n_vclocks = num;
	254	mutex_unlock(&ptp->n_vclocks_mux);
	255
	256	return count;
	257	out:
	258	mutex_unlock(&ptp->n_vclocks_mux);
	259	return err;
	260	}
	261	static DEVICE_ATTR_RW(n_vclocks);
	262
	263	static ssize_t max_vclocks_show(struct device *dev,
	264	struct device_attribute attr, char page)
	265	{
	266	struct ptp_clock *ptp = dev_get_drvdata(dev);
	267	ssize_t size;
	268
f6a175cf	269	size = snprintf(page, PAGE_SIZE - 1, "%u\n", ptp->max_vclocks);
73f37068 YL	270
	271	return size;
	272	}
	273
	274	static ssize_t max_vclocks_store(struct device *dev,
	275	struct device_attribute *attr,
	276	const char *buf, size_t count)
	277	{
	278	struct ptp_clock *ptp = dev_get_drvdata(dev);
44c494c8 YL	279	unsigned int *vclock_index;
	280	int err = -EINVAL;
	281	size_t size;
73f37068 YL	282	u32 max;
	283
	284	if (kstrtou32(buf, 0, &max) \|\| max == 0)
	285	return -EINVAL;
	286
	287	if (max == ptp->max_vclocks)
	288	return count;
	289
	290	if (mutex_lock_interruptible(&ptp->n_vclocks_mux))
	291	return -ERESTARTSYS;
	292
44c494c8 YL	293	if (max < ptp->n_vclocks)
	294	goto out;
	295
	296	size = sizeof(int) * max;
	297	vclock_index = kzalloc(size, GFP_KERNEL);
	298	if (!vclock_index) {
	299	err = -ENOMEM;
	300	goto out;
73f37068 YL	301	}
73f37068 YL	302
44c494c8 YL	303	size = sizeof(int) * ptp->n_vclocks;
	304	memcpy(vclock_index, ptp->vclock_index, size);
	305
	306	kfree(ptp->vclock_index);
	307	ptp->vclock_index = vclock_index;
73f37068 YL	308	ptp->max_vclocks = max;
	309
	310	mutex_unlock(&ptp->n_vclocks_mux);
	311
	312	return count;
44c494c8 YL	313	out:
	314	mutex_unlock(&ptp->n_vclocks_mux);
	315	return err;
73f37068 YL	316	}
	317	static DEVICE_ATTR_RW(max_vclocks);
	318
af59e717 DT	319	static struct attribute *ptp_attrs[] = {
	320	&dev_attr_clock_name.attr,
	321
	322	&dev_attr_max_adjustment.attr,
c3b60ab7	323	&dev_attr_max_phase_adjustment.attr,
af59e717 DT	324	&dev_attr_n_alarms.attr,
	325	&dev_attr_n_external_timestamps.attr,
	326	&dev_attr_n_periodic_outputs.attr,
	327	&dev_attr_n_programmable_pins.attr,
	328	&dev_attr_pps_available.attr,
	329
	330	&dev_attr_extts_enable.attr,
	331	&dev_attr_fifo.attr,
	332	&dev_attr_period.attr,
	333	&dev_attr_pps_enable.attr,
73f37068 YL	334	&dev_attr_n_vclocks.attr,
73f37068 YL	335	&dev_attr_max_vclocks.attr,
af59e717 DT	336	NULL
	337	};
	338
	339	static umode_t ptp_is_attribute_visible(struct kobject *kobj,
	340	struct attribute *attr, int n)
	341	{
	342	struct device *dev = kobj_to_dev(kobj);
	343	struct ptp_clock *ptp = dev_get_drvdata(dev);
	344	struct ptp_clock_info *info = ptp->info;
	345	umode_t mode = attr->mode;
	346
	347	if (attr == &dev_attr_extts_enable.attr \|\|
	348	attr == &dev_attr_fifo.attr) {
	349	if (!info->n_ext_ts)
	350	mode = 0;
	351	} else if (attr == &dev_attr_period.attr) {
	352	if (!info->n_per_out)
	353	mode = 0;
	354	} else if (attr == &dev_attr_pps_enable.attr) {
	355	if (!info->pps)
	356	mode = 0;
73f37068 YL	357	} else if (attr == &dev_attr_n_vclocks.attr \|\|
	358	attr == &dev_attr_max_vclocks.attr) {
	359	if (ptp->is_virtual_clock)
	360	mode = 0;
2c5d234d RR	361	} else if (attr == &dev_attr_max_phase_adjustment.attr) {
	362	if (!info->adjphase \|\| !info->getmaxphase)
	363	mode = 0;
af59e717 DT	364	}
	365
	366	return mode;
	367	}
	368
	369	static const struct attribute_group ptp_group = {
	370	.is_visible = ptp_is_attribute_visible,
	371	.attrs = ptp_attrs,
	372	};
	373
	374	const struct attribute_group *ptp_groups[] = {
	375	&ptp_group,
	376	NULL
	377	};
d94ba80e	378
653104d1 RC	379	static int ptp_pin_name2index(struct ptp_clock ptp, const char name)
	380	{
	381	int i;
	382	for (i = 0; i < ptp->info->n_pins; i++) {
	383	if (!strcmp(ptp->info->pin_config[i].name, name))
	384	return i;
	385	}
	386	return -1;
	387	}
	388
	389	static ssize_t ptp_pin_show(struct device dev, struct device_attribute attr,
	390	char *page)
	391	{
	392	struct ptp_clock *ptp = dev_get_drvdata(dev);
	393	unsigned int func, chan;
	394	int index;
	395
	396	index = ptp_pin_name2index(ptp, attr->attr.name);
	397	if (index < 0)
	398	return -EINVAL;
	399
	400	if (mutex_lock_interruptible(&ptp->pincfg_mux))
	401	return -ERESTARTSYS;
	402
	403	func = ptp->info->pin_config[index].func;
	404	chan = ptp->info->pin_config[index].chan;
	405
	406	mutex_unlock(&ptp->pincfg_mux);
	407
e2cf0765	408	return sysfs_emit(page, "%u %u\n", func, chan);
653104d1 RC	409	}
	410
	411	static ssize_t ptp_pin_store(struct device dev, struct device_attribute attr,
	412	const char *buf, size_t count)
	413	{
	414	struct ptp_clock *ptp = dev_get_drvdata(dev);
	415	unsigned int func, chan;
	416	int cnt, err, index;
	417
	418	cnt = sscanf(buf, "%u %u", &func, &chan);
	419	if (cnt != 2)
	420	return -EINVAL;
	421
	422	index = ptp_pin_name2index(ptp, attr->attr.name);
	423	if (index < 0)
	424	return -EINVAL;
	425
	426	if (mutex_lock_interruptible(&ptp->pincfg_mux))
	427	return -ERESTARTSYS;
	428	err = ptp_set_pinfunc(ptp, index, func, chan);
	429	mutex_unlock(&ptp->pincfg_mux);
	430	if (err)
	431	return err;
	432
	433	return count;
	434	}
	435
85a66e55	436	int ptp_populate_pin_groups(struct ptp_clock *ptp)
d94ba80e	437	{
653104d1 RC	438	struct ptp_clock_info *info = ptp->info;
	439	int err = -ENOMEM, i, n_pins = info->n_pins;
	440
85a66e55 DT	441	if (!n_pins)
	442	return 0;
	443
6f7aa56b	444	ptp->pin_dev_attr = kcalloc(n_pins, sizeof(*ptp->pin_dev_attr),
653104d1 RC	445	GFP_KERNEL);
	446	if (!ptp->pin_dev_attr)
	447	goto no_dev_attr;
	448
6f7aa56b	449	ptp->pin_attr = kcalloc(1 + n_pins, sizeof(*ptp->pin_attr), GFP_KERNEL);
653104d1 RC	450	if (!ptp->pin_attr)
	451	goto no_pin_attr;
	452
	453	for (i = 0; i < n_pins; i++) {
	454	struct device_attribute *da = &ptp->pin_dev_attr[i];
	455	sysfs_attr_init(&da->attr);
	456	da->attr.name = info->pin_config[i].name;
	457	da->attr.mode = 0644;
	458	da->show = ptp_pin_show;
	459	da->store = ptp_pin_store;
	460	ptp->pin_attr[i] = &da->attr;
	461	}
	462
	463	ptp->pin_attr_group.name = "pins";
	464	ptp->pin_attr_group.attrs = ptp->pin_attr;
	465
85a66e55 DT	466	ptp->pin_attr_groups[0] = &ptp->pin_attr_group;
85a66e55 DT	467
653104d1 RC	468	return 0;
653104d1 RC	469
653104d1 RC	470	no_pin_attr:
	471	kfree(ptp->pin_dev_attr);
	472	no_dev_attr:
	473	return err;
	474	}
	475
85a66e55	476	void ptp_cleanup_pin_groups(struct ptp_clock *ptp)
d94ba80e	477	{
85a66e55 DT	478	kfree(ptp->pin_attr);
85a66e55 DT	479	kfree(ptp->pin_dev_attr);
d94ba80e	480	}