Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757290Ab2JQOfq (ORCPT ); Wed, 17 Oct 2012 10:35:46 -0400 Received: from mail-in-02.arcor-online.net ([151.189.21.42]:53991 "EHLO mail-in-02.arcor-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756179Ab2JQOfo (ORCPT ); Wed, 17 Oct 2012 10:35:44 -0400 X-DKIM: Sendmail DKIM Filter v2.8.2 mail-in-09.arcor-online.net 59AD81976BB Subject: [PATCH] HID: roccat: Made tcu sysfs attr rw to allow readout of koneplus sensor register data From: Stefan Achatz Reply-To: erazor_de@users.sourceforge.net To: Rob Landley , Jiri Kosina , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Date: Wed, 17 Oct 2012 16:35:42 +0200 Message-ID: <1350484542.12102.2.camel@neuromancer.tessier-ashpool> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 (2.30.3-1.fc13) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2766 Lines: 67 tcu sysfs attr was used to only control calibration process so far. Reverse engineering the firmware revealed direct sensor register access. Allowing readout of tcu permits usage of this feature. Signed-off-by: Stefan Achatz --- .../ABI/testing/sysfs-driver-hid-roccat-koneplus | 6 +++--- drivers/hid/hid-roccat-koneplus.c | 11 ++++++++++- 2 files changed, 13 insertions(+), 4 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-driver-hid-roccat-koneplus b/Documentation/ABI/testing/sysfs-driver-hid-roccat-koneplus index 65e6e5d..f9e2a61 100644 --- a/Documentation/ABI/testing/sysfs-driver-hid-roccat-koneplus +++ b/Documentation/ABI/testing/sysfs-driver-hid-roccat-koneplus @@ -104,9 +104,9 @@ What: /sys/bus/usb/devices/-:./ Description: When written a calibration process for the tracking control unit - can be initiated/cancelled. - The data has to be 3 bytes long. - This file is writeonly. + can be initiated/cancelled. Also lets one read/write sensor + registers. + The data has to be 4 bytes long. Users: http://roccat.sourceforge.net What: /sys/bus/usb/devices/-:./::./koneplus/roccatkoneplus/tcu_image diff --git a/drivers/hid/hid-roccat-koneplus.c b/drivers/hid/hid-roccat-koneplus.c index f5602fe..c47540a 100644 --- a/drivers/hid/hid-roccat-koneplus.c +++ b/drivers/hid/hid-roccat-koneplus.c @@ -222,6 +222,14 @@ static ssize_t koneplus_sysfs_write_tcu(struct file *fp, sizeof(struct koneplus_tcu), KONEPLUS_COMMAND_TCU); } +static ssize_t koneplus_sysfs_read_tcu(struct file *fp, + struct kobject *kobj, struct bin_attribute *attr, char *buf, + loff_t off, size_t count) +{ + return koneplus_sysfs_read(fp, kobj, buf, off, count, + sizeof(struct koneplus_tcu), KONEPLUS_COMMAND_TCU); +} + static ssize_t koneplus_sysfs_read_tcu_image(struct file *fp, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t count) @@ -426,8 +434,9 @@ static struct bin_attribute koneplus_bin_attributes[] = { .write = koneplus_sysfs_write_sensor }, { - .attr = { .name = "tcu", .mode = 0220 }, + .attr = { .name = "tcu", .mode = 0660 }, .size = sizeof(struct koneplus_tcu), + .read = koneplus_sysfs_read_tcu, .write = koneplus_sysfs_write_tcu }, { -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/