Hi,
I also got a problem with such a device and I took your patch
and applied it to this device. What do you think? The only
substantial change I made was not counting unrequested input
for autosuspend.
Regards
Oliver
>From 7babd79010390e9bee19cf2ac2a0f374a59b1bed Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oneukum@xxxxxxx>
Date: Wed, 3 Sep 2014 15:26:39 +0200
Subject: [PATCH] usbhid: Johan's patch for devices that need constant polling
Some devices need constant polling or they crash.
So move the start of IO from open() to start()
Signed-off-by: Oliver Neukum <oneukum@xxxxxxx>
---
drivers/hid/hid-ids.h | 1 +
drivers/hid/usbhid/hid-core.c | 31 +++++++++++++++++++++++++++----
drivers/hid/usbhid/hid-quirks.c | 1 +
3 files changed, 29 insertions(+), 4 deletions(-)
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 25cd674..b303a62 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -733,6 +733,7 @@
#define USB_DEVICE_ID_PI_ENGINEERING_VEC_USB_FOOTPEDAL 0xff
#define USB_VENDOR_ID_PIXART 0x093a
+#define USB_DEVICE_ID_PIXART_USB_OPTICAL_MOUSE 0x2510
#define USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN 0x8001
#define USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1 0x8002
#define USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2 0x8003
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 79cf503..4507987 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -82,7 +82,7 @@ static int hid_start_in(struct hid_device *hid)
struct usbhid_device *usbhid = hid->driver_data;
spin_lock_irqsave(&usbhid->lock, flags);
- if (hid->open > 0 &&
+ if ((hid->open > 0 || hid->quirks & HID_QUIRK_ALWAYS_POLL) &&
!test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
!test_bit(HID_SUSPENDED, &usbhid->iofl) &&
!test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
@@ -290,8 +290,14 @@ static void hid_irq_in(struct urb *urb)
switch (urb->status) {
case 0: /* success */
- usbhid_mark_busy(usbhid);
usbhid->retry_delay = 0;
+ /*
+ * do not not report unrequested data
+ * neither should it count for autosuspend
+ */
+ if ((hid->quirks & HID_QUIRK_ALWAYS_POLL) && !hid->open)
+ break;
+ usbhid_mark_busy(usbhid);
hid_input_report(urb->context, HID_INPUT_REPORT,
urb->transfer_buffer,
urb->actual_length, 1);
@@ -735,8 +741,10 @@ void usbhid_close(struct hid_device *hid)
if (!--hid->open) {
spin_unlock_irq(&usbhid->lock);
hid_cancel_delayed_stuff(usbhid);
- usb_kill_urb(usbhid->urbin);
- usbhid->intf->needs_remote_wakeup = 0;
+ if (!(hid->quirks & HID_QUIRK_ALWAYS_POLL)) {
+ usb_kill_urb(usbhid->urbin);
+ usbhid->intf->needs_remote_wakeup = 0;
+ }
} else {
spin_unlock_irq(&usbhid->lock);
}
@@ -1134,6 +1142,19 @@ static int usbhid_start(struct hid_device *hid)
set_bit(HID_STARTED, &usbhid->iofl);
+ if (hid->quirks & HID_QUIRK_ALWAYS_POLL) {
+ ret = usb_autopm_get_interface(usbhid->intf);
+ if (ret)
+ goto fail;
+ usbhid->intf->needs_remote_wakeup = 1;
+ ret = hid_start_in(hid);
+ if (ret) {
+ dev_err(&hid->dev,
+ "failed to start in urb: %d\n", ret);
+ }
+ usb_autopm_put_interface(usbhid->intf);
+ }
+
/* Some keyboards don't work until their LEDs have been set.
* Since BIOSes do set the LEDs, it must be safe for any device
* that supports the keyboard boot protocol.
@@ -1166,6 +1187,8 @@ static void usbhid_stop(struct hid_device *hid)
if (WARN_ON(!usbhid))
return;
+ usbhid->intf->needs_remote_wakeup = 0;
+
clear_bit(HID_STARTED, &usbhid->iofl);
spin_lock_irq(&usbhid->lock); /* Sync with error and led handlers */
set_bit(HID_DISCONNECTED, &usbhid->iofl);
diff --git a/drivers/hid/usbhid/hid-quirks.c b/drivers/hid/usbhid/hid-quirks.c
index 15225f3..8a8c667 100644
--- a/drivers/hid/usbhid/hid-quirks.c
+++ b/drivers/hid/usbhid/hid-quirks.c
@@ -79,6 +79,7 @@ static const struct hid_blacklist {
{ USB_VENDOR_ID_NOVATEK, USB_DEVICE_ID_NOVATEK_MOUSE, HID_QUIRK_NO_INIT_REPORTS },
{ USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_1610, HID_QUIRK_NOGET },
{ USB_VENDOR_ID_PENMOUNT, USB_DEVICE_ID_PENMOUNT_1640, HID_QUIRK_NOGET },
+ { USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN, HID_QUIRK_ALWAYS_POLL },
{ USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN, HID_QUIRK_NO_INIT_REPORTS },
{ USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1, HID_QUIRK_NO_INIT_REPORTS },
{ USB_VENDOR_ID_PIXART, USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2, HID_QUIRK_NO_INIT_REPORTS },
--
1.8.4.5
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