From patchwork Mon Nov 3 08:33:02 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dudley Du X-Patchwork-Id: 5214971 Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 55D11C11AC for ; Mon, 3 Nov 2014 08:39:14 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 74E1120166 for ; Mon, 3 Nov 2014 08:39:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9EDC62015E for ; Mon, 3 Nov 2014 08:39:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751620AbaKCIgP (ORCPT ); Mon, 3 Nov 2014 03:36:15 -0500 Received: from mail-pa0-f44.google.com ([209.85.220.44]:64601 "EHLO mail-pa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750910AbaKCIgM (ORCPT ); Mon, 3 Nov 2014 03:36:12 -0500 Received: by mail-pa0-f44.google.com with SMTP id bj1so11748081pad.17 for ; Mon, 03 Nov 2014 00:36:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=HHKurAbZdFvc2KMar4RQlvH0JSmP9uwlQWVdF7pcXO0=; b=MvTMRclpPhLE3Yen6jdfGgyo6fBbOPLwvCPCTW1Zdjoy7cFRp2zqGBxnfHeIz2v3ce CAANKLuU8pwDdCJ8w+heAs2m9jqD/BtYvHKl1zt1VgXIvLPbXwAy8Cz6FUaq1z5bSC31 uvqOAn0j2HgQGns4xu75Te0XwmygzrNXipB8qUo+1EV0kF5+sC3S4d1hJjOxJYNYvN63 V30IAFzLssUaMiBs9z1fVKC+Fe2Yu9cn7Wn84dGBPgV4Ra7L+dC6D+hFjdXbr6AoYi60 bZuf0K2+GYUWPMARmE14TGb1hJmfN4rT3VFhdDaoPuMgxFVTEpY/NqmvUxvYJDbAvRKk V3UQ== X-Received: by 10.67.12.236 with SMTP id et12mr37611814pad.31.1415003772478; Mon, 03 Nov 2014 00:36:12 -0800 (PST) Received: from localhost ([140.207.206.26]) by mx.google.com with ESMTPSA id bv3sm990684pdb.32.2014.11.03.00.36.09 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Mon, 03 Nov 2014 00:36:11 -0800 (PST) From: Dudley Du X-Google-Original-From: Dudley Du To: dmitry.torokhov@gmail.com, rydberg@euromail.se Cc: Dudley Du , bleung@google.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v9 10/18] input: cyapa: add gen3 trackpad device force re-calibrate function support Date: Mon, 3 Nov 2014 16:33:02 +0800 Message-Id: <1415003590-30485-11-git-send-email-dudl@cypress.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1415003590-30485-1-git-send-email-dudl@cypress.com> References: <1415003590-30485-1-git-send-email-dudl@cypress.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=-7.4 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, 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 | 61 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/drivers/input/mouse/cyapa_gen3.c b/drivers/input/mouse/cyapa_gen3.c index 406b5db..b477d67 100644 --- a/drivers/input/mouse/cyapa_gen3.c +++ b/drivers/input/mouse/cyapa_gen3.c @@ -756,6 +756,66 @@ 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 = 20; /* max recalibration timeout 2s. */ + int ret; + + data_reporting_started = false; + + ret = cyapa_read_byte(cyapa, CYAPA_CMD_DEV_STATUS); + if (ret < 0) { + dev_err(dev, "Error reading dev status. err = %d\n", ret); + goto out; + } + if ((ret & CYAPA_DEV_NORMAL) != CYAPA_DEV_NORMAL) { + dev_warn(dev, "Trackpad device is busy. device state = 0x%x\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. ret = %d\n", + ret); + goto out; + } + + 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. err = %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: + data_reporting_started = true; + return ret < 0 ? ret : count; +} + static ssize_t cyapa_gen3_show_baseline(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1141,6 +1201,7 @@ 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,