From patchwork Thu Feb 19 23:35:25 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: srinivas pandruvada X-Patchwork-Id: 5854131 X-Patchwork-Delegate: jikos@jikos.cz Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 9CE2B9F36A for ; Thu, 19 Feb 2015 23:36:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id ABBEE2035C for ; Thu, 19 Feb 2015 23:36:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5F7D42035D for ; Thu, 19 Feb 2015 23:36:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753456AbbBSXgf (ORCPT ); Thu, 19 Feb 2015 18:36:35 -0500 Received: from mga09.intel.com ([134.134.136.24]:34189 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752296AbbBSXgf (ORCPT ); Thu, 19 Feb 2015 18:36:35 -0500 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP; 19 Feb 2015 15:32:25 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,611,1418112000"; d="scan'208";a="688160465" Received: from spandruv-desk3.jf.intel.com ([10.7.199.77]) by orsmga002.jf.intel.com with ESMTP; 19 Feb 2015 15:36:33 -0800 From: Srinivas Pandruvada To: jkosina@suse.cz, jic23@kernel.org Cc: linux-input@vger.kernel.org, Srinivas Pandruvada Subject: [PATCH v3 1/2] HID: hid-sensor-hub: Enhance get feature report API Date: Thu, 19 Feb 2015 15:35:25 -0800 Message-Id: <1424388926-18258-2-git-send-email-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1424388926-18258-1-git-send-email-srinivas.pandruvada@linux.intel.com> References: <1424388926-18258-1-git-send-email-srinivas.pandruvada@linux.intel.com> Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some hid sensor feature report can contain more than one reports. This API can now support receiving multiple values from the feature report. Also update the parameters in the users of this API. Signed-off-by: Srinivas Pandruvada Acked-by: Jonathan Cameron --- drivers/hid/hid-sensor-hub.c | 15 +++++++++++++-- drivers/iio/common/hid-sensors/hid-sensor-attributes.c | 13 +++++++------ drivers/iio/common/hid-sensors/hid-sensor-trigger.c | 4 ++-- include/linux/hid-sensor-hub.h | 8 +++++--- 4 files changed, 27 insertions(+), 13 deletions(-) diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c index e19be62..c3b1b6c 100644 --- a/drivers/hid/hid-sensor-hub.c +++ b/drivers/hid/hid-sensor-hub.c @@ -225,10 +225,11 @@ done_proc: EXPORT_SYMBOL_GPL(sensor_hub_set_feature); int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, - u32 field_index, s32 *value) + u32 field_index, int buffer_size, void *buffer) { struct hid_report *report; struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); + int report_size; int ret = 0; mutex_lock(&data->mutex); @@ -240,7 +241,17 @@ int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, } hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); hid_hw_wait(hsdev->hdev); - *value = report->field[field_index]->value[0]; + + /* calculate number of bytes required to read this field */ + report_size = DIV_ROUND_UP(report->field[field_index]->report_size, + 8) * + report->field[field_index]->report_count; + if (!report_size) { + ret = -EINVAL; + goto done_proc; + } + ret = min(report_size, buffer_size); + memcpy(buffer, report->field[field_index]->value, ret); done_proc: mutex_unlock(&data->mutex); diff --git a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c index 25b01e1..e1435e9 100644 --- a/drivers/iio/common/hid-sensors/hid-sensor-attributes.c +++ b/drivers/iio/common/hid-sensors/hid-sensor-attributes.c @@ -153,8 +153,8 @@ s32 hid_sensor_read_poll_value(struct hid_sensor_common *st) int ret; ret = sensor_hub_get_feature(st->hsdev, - st->poll.report_id, - st->poll.index, &value); + st->poll.report_id, + st->poll.index, sizeof(value), &value); if (ret < 0 || value < 0) { return -EINVAL; @@ -174,8 +174,8 @@ int hid_sensor_read_samp_freq_value(struct hid_sensor_common *st, int ret; ret = sensor_hub_get_feature(st->hsdev, - st->poll.report_id, - st->poll.index, &value); + st->poll.report_id, + st->poll.index, sizeof(value), &value); if (ret < 0 || value < 0) { *val1 = *val2 = 0; return -EINVAL; @@ -229,8 +229,9 @@ int hid_sensor_read_raw_hyst_value(struct hid_sensor_common *st, int ret; ret = sensor_hub_get_feature(st->hsdev, - st->sensitivity.report_id, - st->sensitivity.index, &value); + st->sensitivity.report_id, + st->sensitivity.index, sizeof(value), + &value); if (ret < 0 || value < 0) { *val1 = *val2 = 0; return -EINVAL; diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c index 92068cd..ef0c495 100644 --- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c +++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c @@ -76,8 +76,8 @@ int hid_sensor_power_state(struct hid_sensor_common *st, bool state) } sensor_hub_get_feature(st->hsdev, st->power_state.report_id, - st->power_state.index, - &state_val); + st->power_state.index, + sizeof(state_val), &state_val); return 0; } EXPORT_SYMBOL(hid_sensor_power_state); diff --git a/include/linux/hid-sensor-hub.h b/include/linux/hid-sensor-hub.h index 57acc44..43cdf53 100644 --- a/include/linux/hid-sensor-hub.h +++ b/include/linux/hid-sensor-hub.h @@ -210,13 +210,15 @@ int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, * @hsdev: Hub device instance. * @report_id: Report id to look for * @field_index: Field index inside a report -* @value: Place holder for return value +* @buffer_size: size of the buffer +* @buffer: buffer to copy output * * Used to get a field in feature report. For example this can get polling -* interval, sensitivity, activate/deactivate state. +* interval, sensitivity, activate/deactivate state. On success it returns +* number of bytes copied to buffer. On failure, it returns value < 0. */ int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, - u32 field_index, s32 *value); + u32 field_index, int buffer_size, void *buffer); /* hid-sensor-attributes */