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-rw-r--r--drivers/ptp/ptp_chardev.c128
-rw-r--r--drivers/ptp/ptp_clock.c23
-rw-r--r--drivers/ptp/ptp_ixp46x.c1
-rw-r--r--drivers/ptp/ptp_pch.c1
-rw-r--r--drivers/ptp/ptp_private.h8
-rw-r--r--drivers/ptp/ptp_sysfs.c115
6 files changed, 275 insertions, 1 deletions
diff --git a/drivers/ptp/ptp_chardev.c b/drivers/ptp/ptp_chardev.c
index 34a0c607318e..419056d7887e 100644
--- a/drivers/ptp/ptp_chardev.c
+++ b/drivers/ptp/ptp_chardev.c
@@ -25,6 +25,96 @@
#include "ptp_private.h"
+static int ptp_disable_pinfunc(struct ptp_clock_info *ops,
+ enum ptp_pin_function func, unsigned int chan)
+{
+ struct ptp_clock_request rq;
+ int err = 0;
+
+ memset(&rq, 0, sizeof(rq));
+
+ switch (func) {
+ case PTP_PF_NONE:
+ break;
+ case PTP_PF_EXTTS:
+ rq.type = PTP_CLK_REQ_EXTTS;
+ rq.extts.index = chan;
+ err = ops->enable(ops, &rq, 0);
+ break;
+ case PTP_PF_PEROUT:
+ rq.type = PTP_CLK_REQ_PEROUT;
+ rq.perout.index = chan;
+ err = ops->enable(ops, &rq, 0);
+ break;
+ case PTP_PF_PHYSYNC:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return err;
+}
+
+int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
+ enum ptp_pin_function func, unsigned int chan)
+{
+ struct ptp_clock_info *info = ptp->info;
+ struct ptp_pin_desc *pin1 = NULL, *pin2 = &info->pin_config[pin];
+ unsigned int i;
+
+ /* Check to see if any other pin previously had this function. */
+ for (i = 0; i < info->n_pins; i++) {
+ if (info->pin_config[i].func == func &&
+ info->pin_config[i].chan == chan) {
+ pin1 = &info->pin_config[i];
+ break;
+ }
+ }
+ if (pin1 && i == pin)
+ return 0;
+
+ /* Check the desired function and channel. */
+ switch (func) {
+ case PTP_PF_NONE:
+ break;
+ case PTP_PF_EXTTS:
+ if (chan >= info->n_ext_ts)
+ return -EINVAL;
+ break;
+ case PTP_PF_PEROUT:
+ if (chan >= info->n_per_out)
+ return -EINVAL;
+ break;
+ case PTP_PF_PHYSYNC:
+ pr_err("sorry, cannot reassign the calibration pin\n");
+ return -EINVAL;
+ default:
+ return -EINVAL;
+ }
+
+ if (pin2->func == PTP_PF_PHYSYNC) {
+ pr_err("sorry, cannot reprogram the calibration pin\n");
+ return -EINVAL;
+ }
+
+ if (info->verify(info, pin, func, chan)) {
+ pr_err("driver cannot use function %u on pin %u\n", func, chan);
+ return -EOPNOTSUPP;
+ }
+
+ /* Disable whatever function was previously assigned. */
+ if (pin1) {
+ ptp_disable_pinfunc(info, func, chan);
+ pin1->func = PTP_PF_NONE;
+ pin1->chan = 0;
+ }
+ ptp_disable_pinfunc(info, pin2->func, pin2->chan);
+ pin2->func = func;
+ pin2->chan = chan;
+
+ return 0;
+}
+
int ptp_open(struct posix_clock *pc, fmode_t fmode)
{
return 0;
@@ -35,12 +125,13 @@ 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_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 timespec ts;
int enable, err = 0;
- unsigned int i;
+ unsigned int i, pin_index;
switch (cmd) {
@@ -51,6 +142,7 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
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;
if (copy_to_user((void __user *)arg, &caps, sizeof(caps)))
err = -EFAULT;
break;
@@ -126,6 +218,40 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
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;
diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index a8319b266643..e25d2bc898e5 100644
--- a/drivers/ptp/ptp_clock.c
+++ b/drivers/ptp/ptp_clock.c
@@ -169,6 +169,7 @@ static void delete_ptp_clock(struct posix_clock *pc)
struct ptp_clock *ptp = container_of(pc, struct ptp_clock, clock);
mutex_destroy(&ptp->tsevq_mux);
+ mutex_destroy(&ptp->pincfg_mux);
ida_simple_remove(&ptp_clocks_map, ptp->index);
kfree(ptp);
}
@@ -203,6 +204,7 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_info *info,
ptp->index = index;
spin_lock_init(&ptp->tsevq.lock);
mutex_init(&ptp->tsevq_mux);
+ mutex_init(&ptp->pincfg_mux);
init_waitqueue_head(&ptp->tsev_wq);
/* Create a new device in our class. */
@@ -249,6 +251,7 @@ no_sysfs:
device_destroy(ptp_class, ptp->devid);
no_device:
mutex_destroy(&ptp->tsevq_mux);
+ mutex_destroy(&ptp->pincfg_mux);
no_slot:
kfree(ptp);
no_memory:
@@ -305,6 +308,26 @@ int ptp_clock_index(struct ptp_clock *ptp)
}
EXPORT_SYMBOL(ptp_clock_index);
+int ptp_find_pin(struct ptp_clock *ptp,
+ enum ptp_pin_function func, unsigned int chan)
+{
+ struct ptp_pin_desc *pin = NULL;
+ int i;
+
+ mutex_lock(&ptp->pincfg_mux);
+ for (i = 0; i < ptp->info->n_pins; i++) {
+ if (ptp->info->pin_config[i].func == func &&
+ ptp->info->pin_config[i].chan == chan) {
+ pin = &ptp->info->pin_config[i];
+ break;
+ }
+ }
+ mutex_unlock(&ptp->pincfg_mux);
+
+ return pin ? i : -1;
+}
+EXPORT_SYMBOL(ptp_find_pin);
+
/* module operations */
static void __exit ptp_exit(void)
diff --git a/drivers/ptp/ptp_ixp46x.c b/drivers/ptp/ptp_ixp46x.c
index 4a08727fcaf3..604d340f2095 100644
--- a/drivers/ptp/ptp_ixp46x.c
+++ b/drivers/ptp/ptp_ixp46x.c
@@ -244,6 +244,7 @@ static struct ptp_clock_info ptp_ixp_caps = {
.name = "IXP46X timer",
.max_adj = 66666655,
.n_ext_ts = N_EXT_TS,
+ .n_pins = 0,
.pps = 0,
.adjfreq = ptp_ixp_adjfreq,
.adjtime = ptp_ixp_adjtime,
diff --git a/drivers/ptp/ptp_pch.c b/drivers/ptp/ptp_pch.c
index 71a2559278d7..90a106308c4f 100644
--- a/drivers/ptp/ptp_pch.c
+++ b/drivers/ptp/ptp_pch.c
@@ -514,6 +514,7 @@ static struct ptp_clock_info ptp_pch_caps = {
.name = "PCH timer",
.max_adj = 50000000,
.n_ext_ts = N_EXT_TS,
+ .n_pins = 0,
.pps = 0,
.adjfreq = ptp_pch_adjfreq,
.adjtime = ptp_pch_adjtime,
diff --git a/drivers/ptp/ptp_private.h b/drivers/ptp/ptp_private.h
index df03f2e30ad9..9c5d41421b65 100644
--- a/drivers/ptp/ptp_private.h
+++ b/drivers/ptp/ptp_private.h
@@ -48,8 +48,12 @@ struct ptp_clock {
long dialed_frequency; /* remembers the frequency adjustment */
struct timestamp_event_queue tsevq; /* simple fifo for time stamps */
struct mutex tsevq_mux; /* one process at a time reading the fifo */
+ struct mutex pincfg_mux; /* protect concurrent info->pin_config access */
wait_queue_head_t tsev_wq;
int defunct; /* tells readers to go away when clock is being removed */
+ struct device_attribute *pin_dev_attr;
+ struct attribute **pin_attr;
+ struct attribute_group pin_attr_group;
};
/*
@@ -69,6 +73,10 @@ static inline int queue_cnt(struct timestamp_event_queue *q)
* see ptp_chardev.c
*/
+/* caller must hold pincfg_mux */
+int ptp_set_pinfunc(struct ptp_clock *ptp, unsigned int pin,
+ enum ptp_pin_function func, unsigned int chan);
+
long ptp_ioctl(struct posix_clock *pc,
unsigned int cmd, unsigned long arg);
diff --git a/drivers/ptp/ptp_sysfs.c b/drivers/ptp/ptp_sysfs.c
index 13ec5311746a..302e626fe6b0 100644
--- a/drivers/ptp/ptp_sysfs.c
+++ b/drivers/ptp/ptp_sysfs.c
@@ -18,6 +18,7 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/capability.h>
+#include <linux/slab.h>
#include "ptp_private.h"
@@ -42,6 +43,7 @@ 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 struct attribute *ptp_attrs[] = {
@@ -50,6 +52,7 @@ static struct attribute *ptp_attrs[] = {
&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,
NULL,
};
@@ -175,6 +178,63 @@ out:
return err;
}
+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 snprintf(page, PAGE_SIZE, "%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;
+}
+
static DEVICE_ATTR(extts_enable, 0220, NULL, extts_enable_store);
static DEVICE_ATTR(fifo, 0444, extts_fifo_show, NULL);
static DEVICE_ATTR(period, 0220, NULL, period_store);
@@ -195,9 +255,56 @@ int ptp_cleanup_sysfs(struct ptp_clock *ptp)
if (info->pps)
device_remove_file(dev, &dev_attr_pps_enable);
+ if (info->n_pins) {
+ sysfs_remove_group(&dev->kobj, &ptp->pin_attr_group);
+ kfree(ptp->pin_attr);
+ kfree(ptp->pin_dev_attr);
+ }
return 0;
}
+static int ptp_populate_pins(struct ptp_clock *ptp)
+{
+ struct device *dev = ptp->dev;
+ struct ptp_clock_info *info = ptp->info;
+ int err = -ENOMEM, i, n_pins = info->n_pins;
+
+ ptp->pin_dev_attr = kzalloc(n_pins * sizeof(*ptp->pin_dev_attr),
+ GFP_KERNEL);
+ if (!ptp->pin_dev_attr)
+ goto no_dev_attr;
+
+ ptp->pin_attr = kzalloc((1 + n_pins) * sizeof(struct attribute *),
+ 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;
+
+ err = sysfs_create_group(&dev->kobj, &ptp->pin_attr_group);
+ if (err)
+ goto no_group;
+ return 0;
+
+no_group:
+ kfree(ptp->pin_attr);
+no_pin_attr:
+ kfree(ptp->pin_dev_attr);
+no_dev_attr:
+ return err;
+}
+
int ptp_populate_sysfs(struct ptp_clock *ptp)
{
struct device *dev = ptp->dev;
@@ -222,7 +329,15 @@ int ptp_populate_sysfs(struct ptp_clock *ptp)
if (err)
goto out4;
}
+ if (info->n_pins) {
+ err = ptp_populate_pins(ptp);
+ if (err)
+ goto out5;
+ }
return 0;
+out5:
+ if (info->pps)
+ device_remove_file(dev, &dev_attr_pps_enable);
out4:
if (info->n_per_out)
device_remove_file(dev, &dev_attr_period);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.