From patchwork Tue Aug 1 12:15:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "neil.armstrong@linaro.org" X-Patchwork-Id: 709018 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C087C001DF for ; Tue, 1 Aug 2023 12:16:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234003AbjHAMQH (ORCPT ); Tue, 1 Aug 2023 08:16:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32774 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233841AbjHAMP7 (ORCPT ); Tue, 1 Aug 2023 08:15:59 -0400 Received: from mail-wr1-x431.google.com (mail-wr1-x431.google.com [IPv6:2a00:1450:4864:20::431]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6AA4E19B6 for ; Tue, 1 Aug 2023 05:15:56 -0700 (PDT) Received: by mail-wr1-x431.google.com with SMTP id ffacd0b85a97d-31771bb4869so5742476f8f.0 for ; Tue, 01 Aug 2023 05:15:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1690892155; x=1691496955; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=aB4JTBbloeJlOrROqSHyOpiwaZu7mID8DECUoJEbjX8=; b=NYXCiB2zcVM8Qxs8ecgfX9+NlbuHqLqhg1XLDW7UO5ZNxusn8EogCTNN25O4yFaZPq NE3QcHfjs/dxkvib+JNjvmhuiHd68mfW3GJynW5cuOz43eHTt+iu+R5Bf4ukz0RAyI9b lODns+KP4dMke5heNjAu1i4wAVH+bDHa3FjznVb+uE1h6w7HOhMj9uq80svgRrkBch5u oAYVQ+Q6WBjIJZNZj3Plwd3VBAx+CI0sshBauRsYoT47mormEfsCjVeNUad6Mlwk2WW5 VN5KJdwUEr5u3gx7jdqvYuk2mcqRE+mP6UF506PPftMww3KK0JCH2/CmJJjbTu8jEdkL rClA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690892155; x=1691496955; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=aB4JTBbloeJlOrROqSHyOpiwaZu7mID8DECUoJEbjX8=; b=Iq+2euIV81EmCDz2FKnqEPvGmI6hPrz5YylhlhuZac0h4IYfneRQTjHASy/46S8R2s yrf0IKnoaRgWxnosYWQ0orOWWPaFi2IQ4zxz1BwTnne6VpzRY6olx6uisn1KsQvIq/Xl k/JSVxQG0uPc9aaByjuZYGKoJEsbT2SWuq756/Z7rL1uyeVnP5ljK5uAUu00j1T3wtRS C+IV2nd2HgWtryDNQvp64UZ6txVR+iOB4wU0w81/EJi+uENmfEqEdlw+mq6j4t6vvA/u Ew4n8pGpShzOuugZytI3FTSHsdP78YBlHRRPCtwz8PIV5g9P/5BJ8LUyEfWUdnYVvZN/ N7hQ== X-Gm-Message-State: ABy/qLayHlws9OHuen8dOlbr7Vsvsz6RKTCTr88ozWQvh35hgrmdxKKl 0Z5Geo6LYfhNuUIqfbNd16F8vA== X-Google-Smtp-Source: APBJJlFYRcwmM1zJ/Oxo9kEy79Dyjo4OHKnu+WG2NIj4CepOmQqRxMXYRh0Cs5Mg3zY0m7O9jK8jRw== X-Received: by 2002:a05:6000:1012:b0:313:fbd0:9813 with SMTP id a18-20020a056000101200b00313fbd09813mr2309885wrx.28.1690892154900; Tue, 01 Aug 2023 05:15:54 -0700 (PDT) Received: from arrakeen.starnux.net ([2a01:e0a:982:cbb0:52eb:f6ff:feb3:451a]) by smtp.gmail.com with ESMTPSA id z7-20020a5d4407000000b0031766e99429sm15874351wrq.115.2023.08.01.05.15.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Aug 2023 05:15:54 -0700 (PDT) From: Neil Armstrong Date: Tue, 01 Aug 2023 14:15:48 +0200 Subject: [PATCH v5 4/4] input: touchscreen: add SPI support for Goodix Berlin Touchscreen IC MIME-Version: 1.0 Message-Id: <20230801-topic-goodix-berlin-upstream-initial-v5-4-079252935593@linaro.org> References: <20230801-topic-goodix-berlin-upstream-initial-v5-0-079252935593@linaro.org> In-Reply-To: <20230801-topic-goodix-berlin-upstream-initial-v5-0-079252935593@linaro.org> To: Dmitry Torokhov , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bastien Nocera , Hans de Goede , Henrik Rydberg , Jeff LaBundy Cc: linux-input@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Neil Armstrong X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=8018; i=neil.armstrong@linaro.org; h=from:subject:message-id; bh=Qt+npl8i2OE+s8j4Ze03++ftzJ+qPlUeps9Tw1QwAkg=; b=owEBbQKS/ZANAwAKAXfc29rIyEnRAcsmYgBkyPd0boa3ANgYf7mCgA9NtuidmxhmhgHz17YnxyTI suBo5Z2JAjMEAAEKAB0WIQQ9U8YmyFYF/h30LIt33NvayMhJ0QUCZMj3dAAKCRB33NvayMhJ0RblEA CnLxA/0cnyZcctBZcHCldZRk5OTCZW2u+fLSkmZK/e3n+3w0ublbmJWhOxZ/w/JXP6LFujc1wt5xf7 W4dLl8bNvnU5fdZS3Q54u6pSCkO/8PFA36QCIFa1szf+4XSXfa6xlQDFafaYKZcXUdc9e4w4J3L+Zb L+ivkXtB/hxi268ECm8ShzFEZNsrriJQWqwWIen6NZOt4r+dMZdRhE+H5gIphuOBwKyYN7wN6YpBGW NVmlwxwf6+Mpwu3YXDSpKHbqN9HXhA9J4zDx3rjNfDUsFCQ9/ly1URDygPvJhb2pyOp+fclFFC5hPD E6UMGLS+pqSJ0ButAdY7+tbYyDFQQAL8OszNWzxBmsZGuPfGSjtwziX5985VBM1HNcZoT1Snoaglw3 WotKXzkvWpUrEqgojurP+4DkRqCzn2EWIQiNLCjykQjvs21d0UrcDeWZFQfCP+fAafTWj2m+loypWt D+du67o4qxVPUSV25z2uTlUpf9TubsWLJ2TrrxZrv3RdBKO6y4dD6RuFn2IWvUsnjO03scNIDpc2Mi aymOpA/hLMV3gEF55rjCG6LD86mxulJTwjVZP02NEfO3GgmD+2yeh7bCJe//QJ+wYuPBRWUyXYDqij 2oLY5KOW3sNpPMgt4Irw6XiN78uHf+2hlo9cXXP6Q5NdIlL8cZ393DmpIgMw== X-Developer-Key: i=neil.armstrong@linaro.org; a=openpgp; fpr=89EC3D058446217450F22848169AB7B1A4CFF8AE Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Add initial support for the new Goodix "Berlin" touchscreen ICs over the SPI interface. The driver doesn't use the regmap_spi code since the SPI messages needs to be prefixed, thus this custom regmap code. This initial driver is derived from the Goodix goodix_ts_berlin available at [1] and [2] and only supports the GT9916 IC present on the Qualcomm SM8550 MTP & QRD touch panel. The current implementation only supports BerlinD, aka GT9916. [1] https://github.com/goodix/goodix_ts_berlin [2] https://git.codelinaro.org/clo/la/platform/vendor/opensource/touch-drivers Reviewed-by: Jeff LaBundy Signed-off-by: Neil Armstrong --- drivers/input/touchscreen/Kconfig | 14 +++ drivers/input/touchscreen/Makefile | 1 + drivers/input/touchscreen/goodix_berlin_spi.c | 173 ++++++++++++++++++++++++++ 3 files changed, 188 insertions(+) diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index cc7b88118158..c821fe3ee794 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -433,6 +433,20 @@ config TOUCHSCREEN_GOODIX_BERLIN_I2C To compile this driver as a module, choose M here: the module will be called goodix_berlin_i2c. +config TOUCHSCREEN_GOODIX_BERLIN_SPI + tristate "Goodix Berlin SPI touchscreen" + depends on SPI_MASTER + select REGMAP + select TOUCHSCREEN_GOODIX_BERLIN_CORE + help + Say Y here if you have a Goodix Berlin IC connected to + your system via SPI. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called goodix_berlin_spi. + config TOUCHSCREEN_HIDEEP tristate "HiDeep Touch IC" depends on I2C diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 7ef677cf7a10..a81cb5aa21a5 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -49,6 +49,7 @@ obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o obj-$(CONFIG_TOUCHSCREEN_GOODIX) += goodix_ts.o obj-$(CONFIG_TOUCHSCREEN_GOODIX_BERLIN_CORE) += goodix_berlin_core.o obj-$(CONFIG_TOUCHSCREEN_GOODIX_BERLIN_I2C) += goodix_berlin_i2c.o +obj-$(CONFIG_TOUCHSCREEN_GOODIX_BERLIN_SPI) += goodix_berlin_spi.o obj-$(CONFIG_TOUCHSCREEN_HIDEEP) += hideep.o obj-$(CONFIG_TOUCHSCREEN_HYNITRON_CSTXXX) += hynitron_cstxxx.o obj-$(CONFIG_TOUCHSCREEN_ILI210X) += ili210x.o diff --git a/drivers/input/touchscreen/goodix_berlin_spi.c b/drivers/input/touchscreen/goodix_berlin_spi.c new file mode 100644 index 000000000000..1f57c3592918 --- /dev/null +++ b/drivers/input/touchscreen/goodix_berlin_spi.c @@ -0,0 +1,173 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Goodix Berlin Touchscreen Driver + * + * Copyright (C) 2020 - 2021 Goodix, Inc. + * Copyright (C) 2023 Linaro Ltd. + * + * Based on goodix_ts_berlin driver. + */ +#include +#include +#include +#include +#include + +#include "goodix_berlin.h" + +#define GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN 1 +#define GOODIX_BERLIN_REGISTER_WIDTH 4 +#define GOODIX_BERLIN_SPI_READ_DUMMY_LEN 3 +#define GOODIX_BERLIN_SPI_READ_PREFIX_LEN (GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN + \ + GOODIX_BERLIN_REGISTER_WIDTH + \ + GOODIX_BERLIN_SPI_READ_DUMMY_LEN) +#define GOODIX_BERLIN_SPI_WRITE_PREFIX_LEN (GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN + \ + GOODIX_BERLIN_REGISTER_WIDTH) + +#define GOODIX_BERLIN_SPI_WRITE_FLAG 0xF0 +#define GOODIX_BERLIN_SPI_READ_FLAG 0xF1 + +static int goodix_berlin_spi_read(void *context, const void *reg_buf, + size_t reg_size, void *val_buf, + size_t val_size) +{ + struct spi_device *spi = context; + struct spi_transfer xfers; + struct spi_message spi_msg; + const u32 *reg = reg_buf; /* reg is stored as native u32 at start of buffer */ + u8 *buf; + int error; + + if (reg_size != GOODIX_BERLIN_REGISTER_WIDTH) + return -EINVAL; + + buf = kzalloc(GOODIX_BERLIN_SPI_READ_PREFIX_LEN + val_size, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + spi_message_init(&spi_msg); + memset(&xfers, 0, sizeof(xfers)); + + /* buffer format: 0xF1 + addr(4bytes) + dummy(3bytes) + data */ + buf[0] = GOODIX_BERLIN_SPI_READ_FLAG; + put_unaligned_be32(*reg, buf + GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN); + memset(buf + GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN + GOODIX_BERLIN_REGISTER_WIDTH, + 0xff, GOODIX_BERLIN_SPI_READ_DUMMY_LEN); + + xfers.tx_buf = buf; + xfers.rx_buf = buf; + xfers.len = GOODIX_BERLIN_SPI_READ_PREFIX_LEN + val_size; + xfers.cs_change = 0; + spi_message_add_tail(&xfers, &spi_msg); + + error = spi_sync(spi, &spi_msg); + if (error < 0) + dev_err(&spi->dev, "spi transfer error, %d", error); + else + memcpy(val_buf, buf + GOODIX_BERLIN_SPI_READ_PREFIX_LEN, val_size); + + kfree(buf); + return error; +} + +static int goodix_berlin_spi_write(void *context, const void *data, + size_t count) +{ + unsigned int len = count - GOODIX_BERLIN_REGISTER_WIDTH; + struct spi_device *spi = context; + struct spi_transfer xfers; + struct spi_message spi_msg; + const u32 *reg = data; /* reg is stored as native u32 at start of buffer */ + u8 *buf; + int error; + + buf = kzalloc(GOODIX_BERLIN_SPI_WRITE_PREFIX_LEN + len, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + spi_message_init(&spi_msg); + memset(&xfers, 0, sizeof(xfers)); + + buf[0] = GOODIX_BERLIN_SPI_WRITE_FLAG; + put_unaligned_be32(*reg, buf + GOODIX_BERLIN_SPI_TRANS_PREFIX_LEN); + memcpy(buf + GOODIX_BERLIN_SPI_WRITE_PREFIX_LEN, + data + GOODIX_BERLIN_REGISTER_WIDTH, len); + + xfers.tx_buf = buf; + xfers.len = GOODIX_BERLIN_SPI_WRITE_PREFIX_LEN + len; + xfers.cs_change = 0; + spi_message_add_tail(&xfers, &spi_msg); + + error = spi_sync(spi, &spi_msg); + if (error < 0) + dev_err(&spi->dev, "spi transfer error, %d", error); + + kfree(buf); + return error; +} + +static const struct regmap_config goodix_berlin_spi_regmap_conf = { + .reg_bits = 32, + .val_bits = 8, + .read = goodix_berlin_spi_read, + .write = goodix_berlin_spi_write, +}; + +/* vendor & product left unassigned here, should probably be updated from fw info */ +static const struct input_id goodix_berlin_spi_input_id = { + .bustype = BUS_SPI, +}; + +static int goodix_berlin_spi_probe(struct spi_device *spi) +{ + struct regmap_config regmap_config; + struct regmap *regmap; + size_t max_size; + int error = 0; + + spi->mode = SPI_MODE_0; + spi->bits_per_word = 8; + error = spi_setup(spi); + if (error) + return error; + + max_size = spi_max_transfer_size(spi); + + regmap_config = goodix_berlin_spi_regmap_conf; + regmap_config.max_raw_read = max_size - GOODIX_BERLIN_SPI_READ_PREFIX_LEN; + regmap_config.max_raw_write = max_size - GOODIX_BERLIN_SPI_WRITE_PREFIX_LEN; + + regmap = devm_regmap_init(&spi->dev, NULL, spi, ®map_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + return goodix_berlin_probe(&spi->dev, spi->irq, + &goodix_berlin_spi_input_id, regmap); +} + +static const struct spi_device_id goodix_berlin_spi_ids[] = { + { "gt9916" }, + { }, +}; +MODULE_DEVICE_TABLE(spi, goodix_berlin_spi_ids); + +static const struct of_device_id goodix_berlin_spi_of_match[] = { + { .compatible = "goodix,gt9916", }, + { } +}; +MODULE_DEVICE_TABLE(of, goodix_berlin_spi_of_match); + +static struct spi_driver goodix_berlin_spi_driver = { + .driver = { + .name = "goodix-berlin-spi", + .of_match_table = goodix_berlin_spi_of_match, + .pm = pm_sleep_ptr(&goodix_berlin_pm_ops), + }, + .probe = goodix_berlin_spi_probe, + .id_table = goodix_berlin_spi_ids, +}; +module_spi_driver(goodix_berlin_spi_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Goodix Berlin SPI Touchscreen driver"); +MODULE_AUTHOR("Neil Armstrong ");