From patchwork Thu Aug 19 20:17:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 12447933 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0C86FC4338F for ; Thu, 19 Aug 2021 20:18:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D516F610F9 for ; Thu, 19 Aug 2021 20:18:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234626AbhHSUTC (ORCPT ); Thu, 19 Aug 2021 16:19:02 -0400 Received: from phobos.denx.de ([85.214.62.61]:43890 "EHLO phobos.denx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229853AbhHSUTC (ORCPT ); Thu, 19 Aug 2021 16:19:02 -0400 Received: from tr.lan (ip-89-176-112-137.net.upcbroadband.cz [89.176.112.137]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: marex@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id 26AD38023C; Thu, 19 Aug 2021 22:18:24 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1629404304; bh=oIVhj386a6c2MMOqqy8i4/TR5xjoGdMqefgrqvPYzBA=; h=From:To:Cc:Subject:Date:From; b=X6wW7ACjuMSsMMLeS8559sLvegXDWGXkfq31enm0g77cMj+Dd27LYZ/hWbb5JEinH 1YsXqfZLuCRSmDi47I1eSMF6jAinepMhSvhOLWVUu3Bn5kuhozAVWeE6y33eVKOK1Q x+1xH6RC9WuO/FIX0sEkbp5Ix3Xhu0oVkCozdGuXGz/Taaqn49rKjm6X5cafw0p2p2 xhm3Zl6QYVaf5jNEjBDq8UYv9hon2xDXG4o25qcbYYaXMDKY0G4ftlc29D6RMWTfa1 LcZnP8kltG/FYl52vy3+dqEFnNh+9fBh7BrBB4Udl5m1GULrH+lvLoImLZR3mAViY/ o+3gTwzXo0uEw== From: Marek Vasut To: linux-input@vger.kernel.org Cc: ch@denx.de, Marek Vasut , Dmitry Torokhov , Joe Hung , Luca Hsu Subject: [PATCH 1/2] Input: ili210x - export ili251x version details via sysfs Date: Thu, 19 Aug 2021 22:17:58 +0200 Message-Id: <20210819201759.2084481-1-marex@denx.de> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.103.2 at phobos.denx.de X-Virus-Status: Clean Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org The ili251x firmware protocol permits readout of firmware version, protocol version, mcu version and current mode (application, boot loader, forced update). These information are useful when updating the firmware on the il251x, e.g. to avoid updating the same firmware into the device multiple times. The locking is now necessary to avoid races between interrupt handler and the sysfs readouts. Note that the protocol differs considerably between the ili2xxx devices, this patch therefore implements this functionality only for ili251x that I can test. Signed-off-by: Marek Vasut Cc: Dmitry Torokhov Cc: Joe Hung Cc: Luca Hsu --- NOTE: Regarding checkpatch warnings, Consider renaming function(s) 'ili251x_firmware_version_show' to 'firmware_version_show', I considered it and decided against it, because grepping for ili251x in debug symbols gives far more accurate results than grepping for firmware_version. --- drivers/input/touchscreen/ili210x.c | 130 +++++++++++++++++++++++++++- 1 file changed, 127 insertions(+), 3 deletions(-) diff --git a/drivers/input/touchscreen/ili210x.c b/drivers/input/touchscreen/ili210x.c index 30576a5f2f045..894f74dba5abf 100644 --- a/drivers/input/touchscreen/ili210x.c +++ b/drivers/input/touchscreen/ili210x.c @@ -22,6 +22,12 @@ /* Touchscreen commands */ #define REG_TOUCHDATA 0x10 #define REG_PANEL_INFO 0x20 +#define REG_FIRMWARE_VERSION 0x40 +#define REG_PROTOCOL_VERSION 0x42 +#define REG_KERNEL_VERSION 0x61 +#define REG_IC_MODE 0xc0 +#define REG_IC_MODE_AP 0x5a +#define REG_IC_MODE_BL 0x55 #define REG_CALIBRATE 0xcc struct ili2xxx_chip { @@ -43,6 +49,7 @@ struct ili210x { struct input_dev *input; struct gpio_desc *reset_gpio; struct touchscreen_properties prop; + struct mutex lock; const struct ili2xxx_chip *chip; bool stop; }; @@ -307,7 +314,9 @@ static irqreturn_t ili210x_irq(int irq, void *irq_data) int error; do { + mutex_lock(&priv->lock); error = chip->get_touch_data(client, touchdata); + mutex_unlock(&priv->lock); if (error) { dev_err(&client->dev, "Unable to get touch data: %d\n", error); @@ -323,6 +332,108 @@ static irqreturn_t ili210x_irq(int irq, void *irq_data) return IRQ_HANDLED; } +static ssize_t ili251x_firmware_version_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + struct ili210x *priv = i2c_get_clientdata(client); + u8 fw[8]; + int ret; + + /* Get firmware version */ + mutex_lock(&priv->lock); + ret = priv->chip->read_reg(client, REG_FIRMWARE_VERSION, + &fw, sizeof(fw)); + mutex_unlock(&priv->lock); + + if (ret) + return ret; + + if (!ret) { + ret = scnprintf(buf, PAGE_SIZE, + "%02x%02x.%02x%02x.%02x%02x.%02x%02x\n", + fw[0], fw[1], fw[2], fw[3], + fw[4], fw[5], fw[6], fw[7]); + } + + return ret; +} +static DEVICE_ATTR(firmware_version, 0444, ili251x_firmware_version_show, NULL); + +static ssize_t ili251x_kernel_version_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + struct ili210x *priv = i2c_get_clientdata(client); + u8 kv[5]; + int ret; + + /* Get kernel version */ + mutex_lock(&priv->lock); + ret = priv->chip->read_reg(client, REG_KERNEL_VERSION, + &kv, sizeof(kv)); + mutex_unlock(&priv->lock); + + if (ret) + return ret; + + return scnprintf(buf, PAGE_SIZE, "%02x.%02x.%02x.%02x.%02x\n", + kv[0], kv[1], kv[2], kv[3], kv[4]); +} +static DEVICE_ATTR(kernel_version, 0444, ili251x_kernel_version_show, NULL); + +static ssize_t ili251x_protocol_version_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + struct ili210x *priv = i2c_get_clientdata(client); + u8 pv[2]; + int ret; + + /* Get protocol version */ + mutex_lock(&priv->lock); + ret = priv->chip->read_reg(client, REG_PROTOCOL_VERSION, + &pv, sizeof(pv)); + mutex_unlock(&priv->lock); + + if (ret) + return ret; + + return scnprintf(buf, PAGE_SIZE, "%02x.%02x\n", pv[0], pv[1]); +} +static DEVICE_ATTR(protocol_version, 0444, ili251x_protocol_version_show, NULL); + +static ssize_t ili251x_mode_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + struct ili210x *priv = i2c_get_clientdata(client); + char *mode = "AP"; + u8 md[2]; + int ret; + + /* Get mode */ + mutex_lock(&priv->lock); + ret = priv->chip->read_reg(client, REG_IC_MODE, &md, sizeof(md)); + mutex_unlock(&priv->lock); + + if (ret) + return ret; + + if (md[0] == REG_IC_MODE_AP) /* Application Mode */ + mode = "AP"; + else if (md[0] == REG_IC_MODE_BL) /* BootLoader Mode */ + mode = "BL"; + else /* Unknown Mode */ + mode = "??"; + + return scnprintf(buf, PAGE_SIZE, "%02x.%02x:%s\n", md[0], md[1], mode); +} +static DEVICE_ATTR(mode, 0444, ili251x_mode_show, NULL); + static ssize_t ili210x_calibrate(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) @@ -351,22 +462,34 @@ static DEVICE_ATTR(calibrate, S_IWUSR, NULL, ili210x_calibrate); static struct attribute *ili210x_attributes[] = { &dev_attr_calibrate.attr, + &dev_attr_firmware_version.attr, + &dev_attr_kernel_version.attr, + &dev_attr_protocol_version.attr, + &dev_attr_mode.attr, NULL, }; -static umode_t ili210x_calibrate_visible(struct kobject *kobj, +static umode_t ili210x_attributes_visible(struct kobject *kobj, struct attribute *attr, int index) { struct device *dev = kobj_to_dev(kobj); struct i2c_client *client = to_i2c_client(dev); struct ili210x *priv = i2c_get_clientdata(client); - return priv->chip->has_calibrate_reg ? attr->mode : 0; + /* Calibrate is present on all ILI2xxx which have calibrate register */ + if (attr == &dev_attr_calibrate.attr) + return priv->chip->has_calibrate_reg ? attr->mode : 0; + + /* Firmware/Kernel/Protocol/BootMode is implememted only for ILI251x */ + if (priv->chip != &ili251x_chip) + return 0; + + return attr->mode; } static const struct attribute_group ili210x_attr_group = { .attrs = ili210x_attributes, - .is_visible = ili210x_calibrate_visible, + .is_visible = ili210x_attributes_visible, }; static void ili210x_power_down(void *data) @@ -437,6 +560,7 @@ static int ili210x_i2c_probe(struct i2c_client *client, priv->input = input; priv->reset_gpio = reset_gpio; priv->chip = chip; + mutex_init(&priv->lock); i2c_set_clientdata(client, priv); /* Setup input device */