From patchwork Wed Dec 17 09:57:35 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dudley Du X-Patchwork-Id: 5506251 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 [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 975DC9F1D4 for ; Wed, 17 Dec 2014 10:05:04 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C662B209DC for ; Wed, 17 Dec 2014 10:05:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BA161200E1 for ; Wed, 17 Dec 2014 10:05:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752459AbaLQKDa (ORCPT ); Wed, 17 Dec 2014 05:03:30 -0500 Received: from bay004-omc1s27.hotmail.com ([65.54.190.38]:62197 "EHLO BAY004-OMC1S27.hotmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751466AbaLQKD2 (ORCPT ); Wed, 17 Dec 2014 05:03:28 -0500 Received: from BAY407-EAS93 ([65.54.190.59]) by BAY004-OMC1S27.hotmail.com over TLS secured channel with Microsoft SMTPSVC(7.5.7601.22751); Wed, 17 Dec 2014 01:57:36 -0800 X-TMN: [mN+ITJHlswirJfOIvoN1HoMDRbRuP8zs] X-Originating-Email: [dudlx@outlook.com] Message-ID: From: Dudley Du To: , , CC: , , Subject: [PATCH v16 08/12] input: cyapa: add gen3 trackpad device force Date: Wed, 17 Dec 2014 17:57:35 +0800 MIME-Version: 1.0 X-Mailer: Microsoft Outlook 15.0 Thread-Index: AdAZ3y3Ee+v5nHWkT1SHYN44dAAQPw== Content-Language: zh-cn X-OriginalArrivalTime: 17 Dec 2014 09:57:36.0831 (UTC) FILETIME=[E2DD74F0:01D019DF] 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,FREEMAIL_FROM, 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 Add force re-calibrate function supported for gen3 trackpad device, it can be used through sysfs calibrate interface. TEST=test on Chromebooks. Signed-off-by: Dudley Du --- drivers/input/mouse/cyapa_gen3.c | 59 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) diff --git a/drivers/input/mouse/cyapa_gen3.c b/drivers/input/mouse/cyapa_gen3.c index 92b3d6d..7351fce 100644 --- a/drivers/input/mouse/cyapa_gen3.c +++ b/drivers/input/mouse/cyapa_gen3.c @@ -765,6 +765,64 @@ static int cyapa_gen3_do_fw_update(struct cyapa *cyapa, return 0; } +static ssize_t cyapa_gen3_do_calibrate(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct cyapa *cyapa = dev_get_drvdata(dev); + int tries; + int ret; + + ret = cyapa_read_byte(cyapa, CYAPA_CMD_DEV_STATUS); + if (ret < 0) { + dev_err(dev, "Error reading dev status: %d\n", ret); + goto out; + } + if ((ret & CYAPA_DEV_NORMAL) != CYAPA_DEV_NORMAL) { + dev_warn(dev, "Trackpad device is busy, device state: 0x%02x\n", + ret); + ret = -EAGAIN; + goto out; + } + + ret = cyapa_write_byte(cyapa, CYAPA_CMD_SOFT_RESET, + OP_RECALIBRATION_MASK); + if (ret < 0) { + dev_err(dev, "Failed to send calibrate command: %d\n", + ret); + goto out; + } + + tries = 20; /* max recalibration timeout 2s. */ + do { + /* + * For this recalibration, the max time will not exceed 2s. + * The average time is approximately 500 - 700 ms, and we + * will check the status every 100 - 200ms. + */ + usleep_range(100000, 200000); + + ret = cyapa_read_byte(cyapa, CYAPA_CMD_DEV_STATUS); + if (ret < 0) { + dev_err(dev, "Error reading dev status: %d\n", + ret); + goto out; + } + if ((ret & CYAPA_DEV_NORMAL) == CYAPA_DEV_NORMAL) + break; + } while (--tries); + + if (tries == 0) { + dev_err(dev, "Failed to calibrate. Timeout.\n"); + ret = -ETIMEDOUT; + goto out; + } + dev_dbg(dev, "Calibration successful.\n"); + +out: + return ret < 0 ? ret : count; +} + static ssize_t cyapa_gen3_show_baseline(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1150,6 +1208,7 @@ const struct cyapa_dev_ops cyapa_gen3_ops = { .bl_deactivate = cyapa_gen3_bl_deactivate, .show_baseline = cyapa_gen3_show_baseline, + .calibrate_store = cyapa_gen3_do_calibrate, .state_parse = cyapa_gen3_state_parse, .operational_check = cyapa_gen3_do_operational_check,