HID: use hid_hw_wait() instead of direct call to usbhid

This removes most of the dependencies between hid drivers and usbhid.

The patch was constructed by replacing all occurences of
usbhid_wait_io() by its hid_hw_wait() counterpart.
Then, drivers not requiring USB_HID anymore have their USB_HID
dependency cleaned in the Kconfig file.

As of today, few drivers are still requiring an explicit USB layer
dependency:
* ntrig (a patch is on its way)
* multitouch (one patch following and another on its way)
* lenovo tpkbd
* roccat
* sony

The last three are two deeply using direct calls to the usb subsystem
to be able to be cleaned right now.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

4 files changed, 11 insertions, 13 deletions

diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index da68687..420466b 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -705,7 +705,7 @@ static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, un
 	return 0;
 }
 
-int usbhid_wait_io(struct hid_device *hid)
+static int usbhid_wait_io(struct hid_device *hid)
 {
 	struct usbhid_device *usbhid = hid->driver_data;
 
@@ -719,7 +719,6 @@ int usbhid_wait_io(struct hid_device *hid)
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(usbhid_wait_io);
 
 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
 {
diff --git a/drivers/hid/usbhid/hid-pidff.c b/drivers/hid/usbhid/hid-pidff.c
index 0f1efa3..10b6167 100644
--- a/drivers/hid/usbhid/hid-pidff.c
+++ b/drivers/hid/usbhid/hid-pidff.c
@@ -471,13 +471,13 @@ static int pidff_request_effect_upload(struct pidff_device *pidff, int efnum)
 
 	pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] = 0;
 	pidff->block_load_status->value[0] = 0;
-	usbhid_wait_io(pidff->hid);
+	hid_hw_wait(pidff->hid);
 
 	for (j = 0; j < 60; j++) {
 		hid_dbg(pidff->hid, "pid_block_load requested\n");
 		hid_hw_request(pidff->hid, pidff->reports[PID_BLOCK_LOAD],
 				HID_REQ_GET_REPORT);
-		usbhid_wait_io(pidff->hid);
+		hid_hw_wait(pidff->hid);
 		if (pidff->block_load_status->value[0] ==
 		    pidff->status_id[PID_BLOCK_LOAD_SUCCESS]) {
 			hid_dbg(pidff->hid, "device reported free memory: %d bytes\n",
@@ -551,7 +551,7 @@ static int pidff_erase_effect(struct input_dev *dev, int effect_id)
 		effect_id, pidff->pid_id[effect_id]);
 	/* Wait for the queue to clear. We do not want a full fifo to
 	   prevent the effect removal. */
-	usbhid_wait_io(pidff->hid);
+	hid_hw_wait(pidff->hid);
 	pidff_playback_pid(pidff, pid_id, 0);
 	pidff_erase_pid(pidff, pid_id);
 
@@ -1159,18 +1159,18 @@ static void pidff_reset(struct pidff_device *pidff)
 	pidff->device_control->value[0] = pidff->control_id[PID_RESET];
 	/* We reset twice as sometimes hid_wait_io isn't waiting long enough */
 	hid_hw_request(hid, pidff->reports[PID_DEVICE_CONTROL], HID_REQ_SET_REPORT);
-	usbhid_wait_io(hid);
+	hid_hw_wait(hid);
 	hid_hw_request(hid, pidff->reports[PID_DEVICE_CONTROL], HID_REQ_SET_REPORT);
-	usbhid_wait_io(hid);
+	hid_hw_wait(hid);
 
 	pidff->device_control->value[0] =
 		pidff->control_id[PID_ENABLE_ACTUATORS];
 	hid_hw_request(hid, pidff->reports[PID_DEVICE_CONTROL], HID_REQ_SET_REPORT);
-	usbhid_wait_io(hid);
+	hid_hw_wait(hid);
 
 	/* pool report is sometimes messed up, refetch it */
 	hid_hw_request(hid, pidff->reports[PID_POOL], HID_REQ_GET_REPORT);
-	usbhid_wait_io(hid);
+	hid_hw_wait(hid);
 
 	if (pidff->pool[PID_SIMULTANEOUS_MAX].value) {
 		while (pidff->pool[PID_SIMULTANEOUS_MAX].value[0] < 2) {
@@ -1183,7 +1183,7 @@ static void pidff_reset(struct pidff_device *pidff)
 			hid_dbg(pidff->hid, "pid_pool requested again\n");
 			hid_hw_request(hid, pidff->reports[PID_POOL],
 					  HID_REQ_GET_REPORT);
-			usbhid_wait_io(hid);
+			hid_hw_wait(hid);
 		}
 	}
 }
diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index 430d2a9..2f1ddca 100644
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -706,7 +706,7 @@ static long hiddev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 			break;
 
 		hid_hw_request(hid, report, HID_REQ_GET_REPORT);
-		usbhid_wait_io(hid);
+		hid_hw_wait(hid);
 
 		r = 0;
 		break;
@@ -725,7 +725,7 @@ static long hiddev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 			break;
 
 		hid_hw_request(hid, report, HID_REQ_SET_REPORT);
-		usbhid_wait_io(hid);
+		hid_hw_wait(hid);
 
 		r = 0;
 		break;
diff --git a/drivers/hid/usbhid/usbhid.h b/drivers/hid/usbhid/usbhid.h
index aa1d5ff..dbb6af6 100644
--- a/drivers/hid/usbhid/usbhid.h
+++ b/drivers/hid/usbhid/usbhid.h
@@ -34,7 +34,6 @@
 #include <linux/input.h>
 
 /*  API provided by hid-core.c for USB HID drivers */
-int usbhid_wait_io(struct hid_device* hid);
 void usbhid_close(struct hid_device *hid);
 int usbhid_open(struct hid_device *hid);
 void usbhid_init_reports(struct hid_device *hid);