linux-kernel - Re: joydev.c and saitek cyborg evo force

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Date:	Fri, 10 Aug 2007 17:54:23 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Renato Golin <rengolin@...il.com>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: joydev.c and saitek cyborg evo force

On Fri, 10 Aug 2007, Jiri Kosina wrote:

> Renato, does force feedback work properly in Linux with this device? If 
> so, that would mean that the device has logical maximum and minimum for 
> X and Y axes different in input and output, and we would need to handle 
> this properly (we currently don't).

Renato,

does the attached patch (against 2.6.23-rc2) fix the problem with axis 
ranges for you please?

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 8edbd30..97dbdb6 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -351,6 +351,12 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
 	if (field->flags & HID_MAIN_ITEM_CONSTANT)
 		goto ignore;
 
+	if (field->report_type == HID_OUTPUT_REPORT &&
+			(usage->hid & HID_USAGE_PAGE) != HID_UP_LED) {
+		dbg_hid_line(" [non-LED output field ]");
+		goto ignore;
+	}
+
 	switch (usage->hid & HID_USAGE_PAGE) {
 
 		case HID_UP_UNDEFINED:

-- 
Jiri Kosina
SUSE Labs
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