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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2015-02-19 15:33:56 -0800
committerJiri Kosina <jkosina@suse.cz>2015-02-23 15:16:37 +0100
commitb3f4737d00de317d1549d5cb5b1dad90e19f5cec (patch)
tree92cb55d8f19f340f2daf779336368cb3a34e8426 /drivers/hid
parentcb67126f32f008b9abe97fbfca9b23a797b2458a (diff)
HID: hid-sensor-hub: Extend API for async reads
Add additional flag to read in async mode. In this mode the caller will get reply via registered callback for capture_sample. Callbacks can be registered using sensor_hub_register_callback function. The usage id parameter of the capture_sample can be matched with the usage id of the requested attribute. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/hid-sensor-hub.c65
1 files changed, 35 insertions, 30 deletions
diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c
index c325f85fa3a6..0a9162363164 100644
--- a/drivers/hid/hid-sensor-hub.c
+++ b/drivers/hid/hid-sensor-hub.c
@@ -250,48 +250,53 @@ EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
u32 usage_id,
- u32 attr_usage_id, u32 report_id)
+ u32 attr_usage_id, u32 report_id,
+ enum sensor_hub_read_flags flag)
{
struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
unsigned long flags;
struct hid_report *report;
int ret_val = 0;
- mutex_lock(&hsdev->mutex);
- memset(&hsdev->pending, 0, sizeof(hsdev->pending));
- init_completion(&hsdev->pending.ready);
- hsdev->pending.usage_id = usage_id;
- hsdev->pending.attr_usage_id = attr_usage_id;
- hsdev->pending.raw_size = 0;
-
- spin_lock_irqsave(&data->lock, flags);
- hsdev->pending.status = true;
- spin_unlock_irqrestore(&data->lock, flags);
- report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
+ report = sensor_hub_report(report_id, hsdev->hdev,
+ HID_INPUT_REPORT);
if (!report)
- goto err_free;
+ return -EINVAL;
+ mutex_lock(&hsdev->mutex);
+ if (flag == SENSOR_HUB_SYNC) {
+ memset(&hsdev->pending, 0, sizeof(hsdev->pending));
+ init_completion(&hsdev->pending.ready);
+ hsdev->pending.usage_id = usage_id;
+ hsdev->pending.attr_usage_id = attr_usage_id;
+ hsdev->pending.raw_size = 0;
+
+ spin_lock_irqsave(&data->lock, flags);
+ hsdev->pending.status = true;
+ spin_unlock_irqrestore(&data->lock, flags);
+ }
mutex_lock(&data->mutex);
hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
mutex_unlock(&data->mutex);
- wait_for_completion_interruptible_timeout(&hsdev->pending.ready, HZ*5);
- switch (hsdev->pending.raw_size) {
- case 1:
- ret_val = *(u8 *)hsdev->pending.raw_data;
- break;
- case 2:
- ret_val = *(u16 *)hsdev->pending.raw_data;
- break;
- case 4:
- ret_val = *(u32 *)hsdev->pending.raw_data;
- break;
- default:
- ret_val = 0;
+ if (flag == SENSOR_HUB_SYNC) {
+ wait_for_completion_interruptible_timeout(
+ &hsdev->pending.ready, HZ*5);
+ switch (hsdev->pending.raw_size) {
+ case 1:
+ ret_val = *(u8 *)hsdev->pending.raw_data;
+ break;
+ case 2:
+ ret_val = *(u16 *)hsdev->pending.raw_data;
+ break;
+ case 4:
+ ret_val = *(u32 *)hsdev->pending.raw_data;
+ break;
+ default:
+ ret_val = 0;
+ }
+ kfree(hsdev->pending.raw_data);
+ hsdev->pending.status = false;
}
- kfree(hsdev->pending.raw_data);
-
-err_free:
- hsdev->pending.status = false;
mutex_unlock(&hsdev->mutex);
return ret_val;