#include <linux/fs.h>
#include <linux/cdev.h>
#include <linux/slab.h>
+#include <linux/poll.h>
#include "iio.h"
+#include "iio_core.h"
#include "ring_generic.h"
-int iio_push_ring_event(struct iio_ring_buffer *ring_buf,
- int event_code,
- s64 timestamp)
-{
- return __iio_push_event(&ring_buf->ev_int,
- event_code,
- timestamp,
- &ring_buf->shared_ev_pointer);
-}
-EXPORT_SYMBOL(iio_push_ring_event);
-
-int iio_push_or_escallate_ring_event(struct iio_ring_buffer *ring_buf,
- int event_code,
- s64 timestamp)
-{
- if (ring_buf->shared_ev_pointer.ev_p)
- __iio_change_event(ring_buf->shared_ev_pointer.ev_p,
- event_code,
- timestamp);
- else
- return iio_push_ring_event(ring_buf,
- event_code,
- timestamp);
- return 0;
-}
-EXPORT_SYMBOL(iio_push_or_escallate_ring_event);
/**
- * iio_ring_open() - chrdev file open for ring buffer access
+ * iio_ring_read_first_n_outer() - chrdev read for ring buffer access
*
* This function relies on all ring buffer implementations having an
- * iio_ring_buffer as their first element.
+ * iio_ring _bufer as their first element.
**/
-static int iio_ring_open(struct inode *inode, struct file *filp)
+ssize_t iio_ring_read_first_n_outer(struct file *filp, char __user *buf,
+ size_t n, loff_t *f_ps)
{
- struct iio_handler *hand
- = container_of(inode->i_cdev, struct iio_handler, chrdev);
- struct iio_ring_buffer *rb = hand->private;
-
- filp->private_data = hand->private;
- if (rb->access.mark_in_use)
- rb->access.mark_in_use(rb);
+ struct iio_dev *indio_dev = filp->private_data;
+ struct iio_ring_buffer *rb = indio_dev->ring;
- return 0;
+ if (!rb->access->read_first_n)
+ return -EINVAL;
+ return rb->access->read_first_n(rb, n, buf);
}
/**
- * iio_ring_release() - chrdev file close ring buffer access
- *
- * This function relies on all ring buffer implementations having an
- * iio_ring_buffer as their first element.
- **/
-static int iio_ring_release(struct inode *inode, struct file *filp)
+ * iio_ring_poll() - poll the ring to find out if it has data
+ */
+unsigned int iio_ring_poll(struct file *filp,
+ struct poll_table_struct *wait)
{
- struct cdev *cd = inode->i_cdev;
- struct iio_handler *hand = iio_cdev_to_handler(cd);
- struct iio_ring_buffer *rb = hand->private;
-
- clear_bit(IIO_BUSY_BIT_POS, &rb->access_handler.flags);
- if (rb->access.unmark_in_use)
- rb->access.unmark_in_use(rb);
+ struct iio_dev *indio_dev = filp->private_data;
+ struct iio_ring_buffer *rb = indio_dev->ring;
+ poll_wait(filp, &rb->pollq, wait);
+ if (rb->stufftoread)
+ return POLLIN | POLLRDNORM;
+ /* need a way of knowing if there may be enough data... */
return 0;
}
-/**
- * iio_ring_rip_outer() - chrdev read for ring buffer access
- *
- * This function relies on all ring buffer implementations having an
- * iio_ring _bufer as their first element.
- **/
-static ssize_t iio_ring_rip_outer(struct file *filp, char __user *buf,
- size_t count, loff_t *f_ps)
+void iio_chrdev_ring_open(struct iio_dev *indio_dev)
{
- struct iio_ring_buffer *rb = filp->private_data;
- int ret, dead_offset;
-
- /* rip lots must exist. */
- if (!rb->access.rip_lots)
- return -EINVAL;
- ret = rb->access.rip_lots(rb, count, buf, &dead_offset);
-
- return ret;
+ struct iio_ring_buffer *rb = indio_dev->ring;
+ if (rb && rb->access->mark_in_use)
+ rb->access->mark_in_use(rb);
}
-static const struct file_operations iio_ring_fileops = {
- .read = iio_ring_rip_outer,
- .release = iio_ring_release,
- .open = iio_ring_open,
- .owner = THIS_MODULE,
- .llseek = noop_llseek,
-};
-
-/**
- * __iio_request_ring_buffer_event_chrdev() - allocate ring event chrdev
- * @buf: ring buffer whose event chrdev we are allocating
- * @id: id of this ring buffer (typically 0)
- * @owner: the module who owns the ring buffer (for ref counting)
- * @dev: device with which the chrdev is associated
- **/
-static inline int
-__iio_request_ring_buffer_event_chrdev(struct iio_ring_buffer *buf,
- int id,
- struct module *owner,
- struct device *dev)
+void iio_chrdev_ring_release(struct iio_dev *indio_dev)
{
- int ret;
+ struct iio_ring_buffer *rb = indio_dev->ring;
- snprintf(buf->ev_int._name, sizeof(buf->ev_int._name),
- "%s:event%d",
- dev_name(&buf->dev),
- id);
- ret = iio_setup_ev_int(&(buf->ev_int),
- buf->ev_int._name,
- owner,
- dev);
- if (ret)
- goto error_ret;
- return 0;
+ clear_bit(IIO_BUSY_BIT_POS, &rb->flags);
+ if (rb->access->unmark_in_use)
+ rb->access->unmark_in_use(rb);
-error_ret:
- return ret;
}
-static inline void
-__iio_free_ring_buffer_event_chrdev(struct iio_ring_buffer *buf)
+void iio_ring_buffer_init(struct iio_ring_buffer *ring,
+ struct iio_dev *dev_info)
{
- iio_free_ev_int(&(buf->ev_int));
+ ring->indio_dev = dev_info;
+ init_waitqueue_head(&ring->pollq);
}
+EXPORT_SYMBOL(iio_ring_buffer_init);
-static void iio_ring_access_release(struct device *dev)
+static ssize_t iio_show_scan_index(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
- struct iio_ring_buffer *buf
- = access_dev_to_iio_ring_buffer(dev);
- cdev_del(&buf->access_handler.chrdev);
- iio_device_free_chrdev_minor(MINOR(dev->devt));
+ return sprintf(buf, "%u\n", to_iio_dev_attr(attr)->c->scan_index);
}
-static struct device_type iio_ring_access_type = {
- .release = iio_ring_access_release,
-};
-
-static inline int
-__iio_request_ring_buffer_access_chrdev(struct iio_ring_buffer *buf,
- int id,
- struct module *owner)
+static ssize_t iio_show_fixed_type(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
- int ret, minor;
-
- buf->access_handler.flags = 0;
+ struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ return sprintf(buf, "%c%d/%d>>%u\n",
+ this_attr->c->scan_type.sign,
+ this_attr->c->scan_type.realbits,
+ this_attr->c->scan_type.storagebits,
+ this_attr->c->scan_type.shift);
+}
- buf->access_dev.parent = &buf->dev;
- buf->access_dev.bus = &iio_bus_type;
- buf->access_dev.type = &iio_ring_access_type;
- device_initialize(&buf->access_dev);
+static ssize_t iio_scan_el_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ struct iio_dev *dev_info = dev_get_drvdata(dev);
- minor = iio_device_get_chrdev_minor();
- if (minor < 0) {
- ret = minor;
- goto error_device_put;
- }
- buf->access_dev.devt = MKDEV(MAJOR(iio_devt), minor);
+ ret = iio_scan_mask_query(dev_info->ring,
+ to_iio_dev_attr(attr)->address);
+ if (ret < 0)
+ return ret;
+ return sprintf(buf, "%d\n", ret);
+}
+static int iio_scan_mask_clear(struct iio_ring_buffer *ring, int bit)
+{
+ if (bit > IIO_MAX_SCAN_LENGTH)
+ return -EINVAL;
+ ring->scan_mask &= ~(1 << bit);
+ ring->scan_count--;
+ return 0;
+}
- buf->access_id = id;
+static ssize_t iio_scan_el_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t len)
+{
+ int ret = 0;
+ bool state;
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct iio_ring_buffer *ring = indio_dev->ring;
+ struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
- dev_set_name(&buf->access_dev, "%s:access%d",
- dev_name(&buf->dev),
- buf->access_id);
- ret = device_add(&buf->access_dev);
- if (ret < 0) {
- printk(KERN_ERR "failed to add the ring access dev\n");
- goto error_device_put;
+ state = !(buf[0] == '0');
+ mutex_lock(&indio_dev->mlock);
+ if (indio_dev->currentmode == INDIO_RING_TRIGGERED) {
+ ret = -EBUSY;
+ goto error_ret;
}
-
- cdev_init(&buf->access_handler.chrdev, &iio_ring_fileops);
- buf->access_handler.chrdev.owner = owner;
-
- ret = cdev_add(&buf->access_handler.chrdev, buf->access_dev.devt, 1);
- if (ret) {
- printk(KERN_ERR "failed to allocate ring access chrdev\n");
- goto error_device_unregister;
+ ret = iio_scan_mask_query(ring, this_attr->address);
+ if (ret < 0)
+ goto error_ret;
+ if (!state && ret) {
+ ret = iio_scan_mask_clear(ring, this_attr->address);
+ if (ret)
+ goto error_ret;
+ } else if (state && !ret) {
+ ret = iio_scan_mask_set(ring, this_attr->address);
+ if (ret)
+ goto error_ret;
}
- return 0;
-error_device_unregister:
- device_unregister(&buf->access_dev);
-error_device_put:
- put_device(&buf->access_dev);
+error_ret:
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret ? ret : len;
- return ret;
}
-static void __iio_free_ring_buffer_access_chrdev(struct iio_ring_buffer *buf)
+static ssize_t iio_scan_el_ts_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
- device_unregister(&buf->access_dev);
+ struct iio_dev *dev_info = dev_get_drvdata(dev);
+ return sprintf(buf, "%d\n", dev_info->ring->scan_timestamp);
}
-void iio_ring_buffer_init(struct iio_ring_buffer *ring,
- struct iio_dev *dev_info)
+static ssize_t iio_scan_el_ts_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t len)
{
- if (ring->access.mark_param_change)
- ring->access.mark_param_change(ring);
- ring->indio_dev = dev_info;
- ring->ev_int.private = ring;
- ring->access_handler.private = ring;
- ring->shared_ev_pointer.ev_p = NULL;
- spin_lock_init(&ring->shared_ev_pointer.lock);
+ int ret = 0;
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ bool state;
+
+ state = !(buf[0] == '0');
+ mutex_lock(&indio_dev->mlock);
+ if (indio_dev->currentmode == INDIO_RING_TRIGGERED) {
+ ret = -EBUSY;
+ goto error_ret;
+ }
+ indio_dev->ring->scan_timestamp = state;
+error_ret:
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret ? ret : len;
}
-EXPORT_SYMBOL(iio_ring_buffer_init);
-int iio_ring_buffer_register(struct iio_ring_buffer *ring, int id)
+static int iio_ring_add_channel_sysfs(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
{
int ret;
-
- ring->id = id;
-
- dev_set_name(&ring->dev, "%s:buffer%d",
- dev_name(ring->dev.parent),
- ring->id);
- ret = device_add(&ring->dev);
+ struct iio_ring_buffer *ring = indio_dev->ring;
+
+ ret = __iio_add_chan_devattr("index", "scan_elements",
+ chan,
+ &iio_show_scan_index,
+ NULL,
+ 0,
+ 0,
+ &indio_dev->dev,
+ &ring->scan_el_dev_attr_list);
if (ret)
goto error_ret;
- ret = __iio_request_ring_buffer_event_chrdev(ring,
- 0,
- ring->owner,
- &ring->dev);
+ ret = __iio_add_chan_devattr("type", "scan_elements",
+ chan,
+ &iio_show_fixed_type,
+ NULL,
+ 0,
+ 0,
+ &indio_dev->dev,
+ &ring->scan_el_dev_attr_list);
if (ret)
- goto error_remove_device;
+ goto error_ret;
+
+ if (chan->type != IIO_TIMESTAMP)
+ ret = __iio_add_chan_devattr("en", "scan_elements",
+ chan,
+ &iio_scan_el_show,
+ &iio_scan_el_store,
+ chan->scan_index,
+ 0,
+ &indio_dev->dev,
+ &ring->scan_el_dev_attr_list);
+ else
+ ret = __iio_add_chan_devattr("en", "scan_elements",
+ chan,
+ &iio_scan_el_ts_show,
+ &iio_scan_el_ts_store,
+ chan->scan_index,
+ 0,
+ &indio_dev->dev,
+ &ring->scan_el_dev_attr_list);
+error_ret:
+ return ret;
+}
- ret = __iio_request_ring_buffer_access_chrdev(ring,
- 0,
- ring->owner);
+static void iio_ring_remove_and_free_scan_dev_attr(struct iio_dev *indio_dev,
+ struct iio_dev_attr *p)
+{
+ sysfs_remove_file_from_group(&indio_dev->dev.kobj,
+ &p->dev_attr.attr, "scan_elements");
+ kfree(p->dev_attr.attr.name);
+ kfree(p);
+}
- if (ret)
- goto error_free_ring_buffer_event_chrdev;
+static struct attribute *iio_scan_el_dummy_attrs[] = {
+ NULL
+};
+
+static struct attribute_group iio_scan_el_dummy_group = {
+ .name = "scan_elements",
+ .attrs = iio_scan_el_dummy_attrs
+};
+
+static void __iio_ring_attr_cleanup(struct iio_dev *indio_dev)
+{
+ struct iio_dev_attr *p, *n;
+ struct iio_ring_buffer *ring = indio_dev->ring;
+ int anydynamic = !list_empty(&ring->scan_el_dev_attr_list);
+ list_for_each_entry_safe(p, n,
+ &ring->scan_el_dev_attr_list, l)
+ iio_ring_remove_and_free_scan_dev_attr(indio_dev, p);
+
+ if (ring->scan_el_attrs)
+ sysfs_remove_group(&indio_dev->dev.kobj,
+ ring->scan_el_attrs);
+ else if (anydynamic)
+ sysfs_remove_group(&indio_dev->dev.kobj,
+ &iio_scan_el_dummy_group);
+}
+
+int iio_ring_buffer_register_ex(struct iio_dev *indio_dev, int id,
+ const struct iio_chan_spec *channels,
+ int num_channels)
+{
+ struct iio_ring_buffer *ring = indio_dev->ring;
+ int ret, i;
if (ring->scan_el_attrs) {
- ret = sysfs_create_group(&ring->dev.kobj,
+ ret = sysfs_create_group(&indio_dev->dev.kobj,
ring->scan_el_attrs);
if (ret) {
- dev_err(&ring->dev,
+ dev_err(&indio_dev->dev,
"Failed to add sysfs scan elements\n");
- goto error_free_ring_buffer_event_chrdev;
+ goto error_ret;
+ }
+ } else if (channels) {
+ ret = sysfs_create_group(&indio_dev->dev.kobj,
+ &iio_scan_el_dummy_group);
+ if (ret)
+ goto error_ret;
+ }
+ if (ring->attrs) {
+ ret = sysfs_create_group(&indio_dev->dev.kobj,
+ ring->attrs);
+ if (ret)
+ goto error_cleanup_dynamic;
+ }
+
+ INIT_LIST_HEAD(&ring->scan_el_dev_attr_list);
+ if (channels) {
+ /* new magic */
+ for (i = 0; i < num_channels; i++) {
+ ret = iio_ring_add_channel_sysfs(indio_dev,
+ &channels[i]);
+ if (ret < 0)
+ goto error_cleanup_group;
}
}
- return ret;
-error_free_ring_buffer_event_chrdev:
- __iio_free_ring_buffer_event_chrdev(ring);
-error_remove_device:
- device_del(&ring->dev);
+ return 0;
+error_cleanup_group:
+ if (ring->attrs)
+ sysfs_remove_group(&indio_dev->dev.kobj, ring->attrs);
+error_cleanup_dynamic:
+ __iio_ring_attr_cleanup(indio_dev);
error_ret:
return ret;
}
-EXPORT_SYMBOL(iio_ring_buffer_register);
+EXPORT_SYMBOL(iio_ring_buffer_register_ex);
-void iio_ring_buffer_unregister(struct iio_ring_buffer *ring)
+void iio_ring_buffer_unregister(struct iio_dev *indio_dev)
{
- if (ring->scan_el_attrs)
- sysfs_remove_group(&ring->dev.kobj,
- ring->scan_el_attrs);
-
- __iio_free_ring_buffer_access_chrdev(ring);
- __iio_free_ring_buffer_event_chrdev(ring);
- device_del(&ring->dev);
+ if (indio_dev->ring->attrs)
+ sysfs_remove_group(&indio_dev->dev.kobj,
+ indio_dev->ring->attrs);
+ __iio_ring_attr_cleanup(indio_dev);
}
EXPORT_SYMBOL(iio_ring_buffer_unregister);
struct device_attribute *attr,
char *buf)
{
- int len = 0;
- struct iio_ring_buffer *ring = dev_get_drvdata(dev);
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct iio_ring_buffer *ring = indio_dev->ring;
- if (ring->access.get_length)
- len = sprintf(buf, "%d\n",
- ring->access.get_length(ring));
+ if (ring->access->get_length)
+ return sprintf(buf, "%d\n",
+ ring->access->get_length(ring));
- return len;
+ return 0;
}
EXPORT_SYMBOL(iio_read_ring_length);
{
int ret;
ulong val;
- struct iio_ring_buffer *ring = dev_get_drvdata(dev);
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct iio_ring_buffer *ring = indio_dev->ring;
+
ret = strict_strtoul(buf, 10, &val);
if (ret)
return ret;
- if (ring->access.get_length)
- if (val == ring->access.get_length(ring))
+ if (ring->access->get_length)
+ if (val == ring->access->get_length(ring))
return len;
- if (ring->access.set_length) {
- ring->access.set_length(ring, val);
- if (ring->access.mark_param_change)
- ring->access.mark_param_change(ring);
+ if (ring->access->set_length) {
+ ring->access->set_length(ring, val);
+ if (ring->access->mark_param_change)
+ ring->access->mark_param_change(ring);
}
return len;
struct device_attribute *attr,
char *buf)
{
- int len = 0;
- struct iio_ring_buffer *ring = dev_get_drvdata(dev);
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct iio_ring_buffer *ring = indio_dev->ring;
- if (ring->access.get_bytes_per_datum)
- len = sprintf(buf, "%d\n",
- ring->access.get_bytes_per_datum(ring));
+ if (ring->access->get_bytes_per_datum)
+ return sprintf(buf, "%d\n",
+ ring->access->get_bytes_per_datum(ring));
- return len;
+ return 0;
}
EXPORT_SYMBOL(iio_read_ring_bytes_per_datum);
int ret;
bool requested_state, current_state;
int previous_mode;
- struct iio_ring_buffer *ring = dev_get_drvdata(dev);
- struct iio_dev *dev_info = ring->indio_dev;
+ struct iio_dev *dev_info = dev_get_drvdata(dev);
+ struct iio_ring_buffer *ring = dev_info->ring;
mutex_lock(&dev_info->mlock);
previous_mode = dev_info->currentmode;
goto done;
}
if (requested_state) {
- if (ring->preenable) {
- ret = ring->preenable(dev_info);
+ if (ring->setup_ops->preenable) {
+ ret = ring->setup_ops->preenable(dev_info);
if (ret) {
printk(KERN_ERR
"Buffer not started:"
goto error_ret;
}
}
- if (ring->access.request_update) {
- ret = ring->access.request_update(ring);
+ if (ring->access->request_update) {
+ ret = ring->access->request_update(ring);
if (ret) {
printk(KERN_INFO
"Buffer not started:"
goto error_ret;
}
}
- if (ring->access.mark_in_use)
- ring->access.mark_in_use(ring);
+ if (ring->access->mark_in_use)
+ ring->access->mark_in_use(ring);
/* Definitely possible for devices to support both of these.*/
if (dev_info->modes & INDIO_RING_TRIGGERED) {
if (!dev_info->trig) {
printk(KERN_INFO
"Buffer not started: no trigger\n");
ret = -EINVAL;
- if (ring->access.unmark_in_use)
- ring->access.unmark_in_use(ring);
+ if (ring->access->unmark_in_use)
+ ring->access->unmark_in_use(ring);
goto error_ret;
}
dev_info->currentmode = INDIO_RING_TRIGGERED;
goto error_ret;
}
- if (ring->postenable) {
-
- ret = ring->postenable(dev_info);
+ if (ring->setup_ops->postenable) {
+ ret = ring->setup_ops->postenable(dev_info);
if (ret) {
printk(KERN_INFO
"Buffer not started:"
"postenable failed\n");
- if (ring->access.unmark_in_use)
- ring->access.unmark_in_use(ring);
+ if (ring->access->unmark_in_use)
+ ring->access->unmark_in_use(ring);
dev_info->currentmode = previous_mode;
- if (ring->postdisable)
- ring->postdisable(dev_info);
+ if (ring->setup_ops->postdisable)
+ ring->setup_ops->postdisable(dev_info);
goto error_ret;
}
}
} else {
- if (ring->predisable) {
- ret = ring->predisable(dev_info);
+ if (ring->setup_ops->predisable) {
+ ret = ring->setup_ops->predisable(dev_info);
if (ret)
goto error_ret;
}
- if (ring->access.unmark_in_use)
- ring->access.unmark_in_use(ring);
+ if (ring->access->unmark_in_use)
+ ring->access->unmark_in_use(ring);
dev_info->currentmode = INDIO_DIRECT_MODE;
- if (ring->postdisable) {
- ret = ring->postdisable(dev_info);
+ if (ring->setup_ops->postdisable) {
+ ret = ring->setup_ops->postdisable(dev_info);
if (ret)
goto error_ret;
}
return ret;
}
EXPORT_SYMBOL(iio_store_ring_enable);
+
ssize_t iio_show_ring_enable(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct iio_ring_buffer *ring = dev_get_drvdata(dev);
- return sprintf(buf, "%d\n", !!(ring->indio_dev->currentmode
+ struct iio_dev *dev_info = dev_get_drvdata(dev);
+ return sprintf(buf, "%d\n", !!(dev_info->currentmode
& INDIO_ALL_RING_MODES));
}
EXPORT_SYMBOL(iio_show_ring_enable);
-ssize_t iio_scan_el_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+int iio_sw_ring_preenable(struct iio_dev *indio_dev)
{
- int ret;
- struct iio_ring_buffer *ring = dev_get_drvdata(dev);
- struct iio_scan_el *this_el = to_iio_scan_el(attr);
-
- ret = iio_scan_mask_query(ring, this_el->number);
- if (ret < 0)
- return ret;
- return sprintf(buf, "%d\n", ret);
-}
-EXPORT_SYMBOL(iio_scan_el_show);
-
-ssize_t iio_scan_el_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
-{
- int ret = 0;
- bool state;
- struct iio_ring_buffer *ring = dev_get_drvdata(dev);
- struct iio_dev *indio_dev = ring->indio_dev;
- struct iio_scan_el *this_el = to_iio_scan_el(attr);
-
- state = !(buf[0] == '0');
- mutex_lock(&indio_dev->mlock);
- if (indio_dev->currentmode == INDIO_RING_TRIGGERED) {
- ret = -EBUSY;
- goto error_ret;
- }
- ret = iio_scan_mask_query(ring, this_el->number);
- if (ret < 0)
- goto error_ret;
- if (!state && ret) {
- ret = iio_scan_mask_clear(ring, this_el->number);
- if (ret)
- goto error_ret;
- } else if (state && !ret) {
- ret = iio_scan_mask_set(ring, this_el->number);
- if (ret)
- goto error_ret;
- }
- if (this_el->set_state)
- ret = this_el->set_state(this_el, indio_dev, state);
-error_ret:
- mutex_unlock(&indio_dev->mlock);
-
- return ret ? ret : len;
-
-}
-EXPORT_SYMBOL(iio_scan_el_store);
-
-ssize_t iio_scan_el_ts_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_ring_buffer *ring = dev_get_drvdata(dev);
- return sprintf(buf, "%d\n", ring->scan_timestamp);
-}
-EXPORT_SYMBOL(iio_scan_el_ts_show);
-
-ssize_t iio_scan_el_ts_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
-{
- int ret = 0;
- struct iio_ring_buffer *ring = dev_get_drvdata(dev);
- struct iio_dev *indio_dev = ring->indio_dev;
- bool state;
- state = !(buf[0] == '0');
- mutex_lock(&indio_dev->mlock);
- if (indio_dev->currentmode == INDIO_RING_TRIGGERED) {
- ret = -EBUSY;
- goto error_ret;
- }
- ring->scan_timestamp = state;
-error_ret:
- mutex_unlock(&indio_dev->mlock);
+ struct iio_ring_buffer *ring = indio_dev->ring;
+ size_t size;
+ dev_dbg(&indio_dev->dev, "%s\n", __func__);
+ /* Check if there are any scan elements enabled, if not fail*/
+ if (!(ring->scan_count || ring->scan_timestamp))
+ return -EINVAL;
+ if (ring->scan_timestamp)
+ if (ring->scan_count)
+ /* Timestamp (aligned to s64) and data */
+ size = (((ring->scan_count * ring->bpe)
+ + sizeof(s64) - 1)
+ & ~(sizeof(s64) - 1))
+ + sizeof(s64);
+ else /* Timestamp only */
+ size = sizeof(s64);
+ else /* Data only */
+ size = ring->scan_count * ring->bpe;
+ ring->access->set_bytes_per_datum(ring, size);
- return ret ? ret : len;
+ return 0;
}
-EXPORT_SYMBOL(iio_scan_el_ts_store);
-
+EXPORT_SYMBOL(iio_sw_ring_preenable);
projects / deliverable / linux.git / blobdiff