From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751824AbaJOHV2 (ORCPT ); Wed, 15 Oct 2014 03:21:28 -0400 Received: from mail-pa0-f51.google.com ([209.85.220.51]:55875 "EHLO mail-pa0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751241AbaJOHVZ (ORCPT ); Wed, 15 Oct 2014 03:21:25 -0400 From: Dudley Du X-Google-Original-From: Dudley Du To: dmitry.torokhov@gmail.com, rydberg@euromail.se Cc: Dudley Du , bleung@google.com, patrikf@google.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 08/13] input: cyapa: add gen3 trackpad device baseline and calibrate functions support Date: Wed, 15 Oct 2014 15:19:22 +0800 Message-Id: <1413357567-26177-9-git-send-email-dudl@cypress.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1413357567-26177-1-git-send-email-dudl@cypress.com> References: <1413357567-26177-1-git-send-email-dudl@cypress.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add report baseline and force calibrate functions supported for gen3 trackpad device, which these functions are supplied through cyapa core baseline and calibrate interfaces. TEST=test on Chromebooks. Signed-off-by: Dudley Du --- drivers/input/mouse/cyapa_gen3.c | 135 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 135 insertions(+) diff --git a/drivers/input/mouse/cyapa_gen3.c b/drivers/input/mouse/cyapa_gen3.c index 1f9338b..c92da08 100644 --- a/drivers/input/mouse/cyapa_gen3.c +++ b/drivers/input/mouse/cyapa_gen3.c @@ -756,6 +756,138 @@ 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) +{ + struct cyapa *cyapa = dev_get_drvdata(dev); + int max_baseline, min_baseline; + int tries = 3; + 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_REPORT_BASELINE_MASK); + if (ret < 0) { + dev_err(dev, "Failed to send report baseline command. %d\n", + ret); + goto out; + } + + do { + usleep_range(10000, 20000); + + 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, "Device timed out going to Normal state.\n"); + ret = -ETIMEDOUT; + goto out; + } + + ret = cyapa_read_byte(cyapa, CYAPA_CMD_MAX_BASELINE); + if (ret < 0) { + dev_err(dev, "Failed to read max baseline. err = %d\n", ret); + goto out; + } + max_baseline = ret; + + ret = cyapa_read_byte(cyapa, CYAPA_CMD_MIN_BASELINE); + if (ret < 0) { + dev_err(dev, "Failed to read min baseline. err = %d\n", ret); + goto out; + } + min_baseline = ret; + + dev_dbg(dev, "Baseline report successful. Max: %d Min: %d\n", + max_baseline, min_baseline); + ret = scnprintf(buf, PAGE_SIZE, "%d %d\n", max_baseline, min_baseline); + +out: + data_reporting_started = true; + return ret; +} + /* * cyapa_get_wait_time_for_pwr_cmd * @@ -1071,6 +1203,9 @@ const struct cyapa_dev_ops cyapa_gen3_ops = { .update_fw = cyapa_gen3_do_fw_update, .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, -- 1.9.1