From patchwork Thu Jun 29 09:27:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neil Armstrong X-Patchwork-Id: 697727 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 8C051EB64DC for ; Thu, 29 Jun 2023 09:27:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232457AbjF2J1a (ORCPT ); Thu, 29 Jun 2023 05:27:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38910 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232482AbjF2J1Z (ORCPT ); Thu, 29 Jun 2023 05:27:25 -0400 Received: from mail-wm1-x32f.google.com (mail-wm1-x32f.google.com [IPv6:2a00:1450:4864:20::32f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 47509E72 for ; Thu, 29 Jun 2023 02:27:21 -0700 (PDT) Received: by mail-wm1-x32f.google.com with SMTP id 5b1f17b1804b1-3fbc0609e13so1491755e9.3 for ; Thu, 29 Jun 2023 02:27:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1688030839; x=1690622839; 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=HZGBLi25nD/aYuOw3g39i4aiVU+4nS8bcITX87gTnA8=; b=JwvFdt5YNfwsmdSMMK3A3ounP/F695t9fcdN7Emj3CM+JxBsubSFoWpfasmMC2d9vX BQxznwtr+rqbp6nWuEBR9yNgi234oBoWJKOs5MDGpnbd6X421zK86p8KYyiLXddfC0Zw +r42yDJIU3fbtKx4aYoOmKa0de00bwKkX2BX6b32j/NIYDB+ReJdXdWuIbftofFMyb0q f5P72967wWrbECvfVBJ22R9Jp47KJ8+pUUQMNTLu2eRx09LlVmvNxp4lAFL7GaOF+Jsc k8P5nJq2WZ8AJ/QHfjbYmrKI++2y7vUV+bm0jQM8RuhfePiyxem9X67XvbVcFQHpDRgX vn6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688030839; x=1690622839; 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=HZGBLi25nD/aYuOw3g39i4aiVU+4nS8bcITX87gTnA8=; b=IKLgeh4XBNxt+rHFHu1c870VQPyH/aW5rIKk3aK9pmFPESJ99owEhm0ljF/e6dpR45 WdWg6DnPTWzjDPsy62crL4mCObLUVpkgNv/aUDfWqq49mVtFG040d6+mGO7oYV5t/5WC AEUFFccZfqeqHaBfiYDXZ7RITAVgfslAI+eLSN55l71/L7b9bgFKyx0W86g5XvTuEjnM 6yy5gtekfZPwX4jCDL+fimiSr8yJc6bOdZnt9vRSTXNF7ujEO9UNcZcm1ND9M1VkJWsM +QDtA6n4gJRK0FSPYlaRkZdnY1DJ4MoKDdjsO1gWC6dWHwTZRyGx+ycrCwthW8eq3CWR atLg== X-Gm-Message-State: AC+VfDzte1BWVsDEJBh9Gh70NkRl3vqwt+hL1s5iQMi9iAwuj8LEGuN8 xt+gjb1cHRk0cSs2+vpNsoFibA== X-Google-Smtp-Source: ACHHUZ7P4MWcc6O55yn4+rliA2qWJPivyUZdzHRm79m61CnCfrQqjtJybi4ArMd/B6fBxv2myMPVyQ== X-Received: by 2002:adf:ed45:0:b0:314:f18:bc65 with SMTP id u5-20020adfed45000000b003140f18bc65mr3404730wro.66.1688030839587; Thu, 29 Jun 2023 02:27:19 -0700 (PDT) Received: from arrakeen.starnux.net ([2a01:e0a:982:cbb0:52eb:f6ff:feb3:451a]) by smtp.gmail.com with ESMTPSA id s4-20020adfea84000000b002ca864b807csm15800172wrm.0.2023.06.29.02.27.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Jun 2023 02:27:19 -0700 (PDT) From: Neil Armstrong Date: Thu, 29 Jun 2023 11:27:13 +0200 Subject: [PATCH v4 4/4] input: touchscreen: add SPI support for Goodix Berlin Touchscreen IC MIME-Version: 1.0 Message-Id: <20230606-topic-goodix-berlin-upstream-initial-v4-4-0947c489be17@linaro.org> References: <20230606-topic-goodix-berlin-upstream-initial-v4-0-0947c489be17@linaro.org> In-Reply-To: <20230606-topic-goodix-berlin-upstream-initial-v4-0-0947c489be17@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 0.12.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=8018; i=neil.armstrong@linaro.org; h=from:subject:message-id; bh=6p0qngI+/AjpbuUEco8P0GD1zTWs+gFMrO17zX2V82Q=; b=owEBbQKS/ZANAwAKAXfc29rIyEnRAcsmYgBknU5x/8zktV99fc+Q7u4NhVsZoYCiIckYKTLEBy3k 9V8+tQiJAjMEAAEKAB0WIQQ9U8YmyFYF/h30LIt33NvayMhJ0QUCZJ1OcQAKCRB33NvayMhJ0aJ1D/ 9td8jJScav9Iuj/5n3XSoGlWcu+AwYn0kMBvotekXJqTvq6L2XoRC/PTkdOyuVfsDwkK/pM1GjaIZk X5OpXwSIuI5tcYie/3cIASHYHjfF/sCTcSQKn3WqnbVv7+2s78/gCpVq/uItjK0HZ+abN4mNm0cN8+ QBahtJxjK3jTPwJVgSaZsMpa3aAetZVKBoSzHazaYgPdNKQAD/kFDfZ61Vi3Xx2tYEbHR/YMnymVa6 OSRhj0uHmaS5zuTAKK9U6rzDfqMtNGSdmZkEa4d0/0rHeGyhQhak57BLMTrBRy4rAfnuIMtfdbf52K mFhoNAN+E1ayBai0rHk/vz0M3EdzfiMO9KtlP/BNoBCilFdUjtpsGrY5gIpwF0uNDUCJWYs4aCp1bb QRUL5jS7SdwwSi2jm5YyEwKkZwC161H+tYeSAeQ3UyzWHq9T+aPcU9vXWCwzNq7tf2QamIhmyFBtu2 8a902rmdbDKpSF465c1apyeGzcghBFHL3AN64mhpVpgkoXDDNyALcLDS17r0jqj2ErdUZPpjW7IxUh GaP4znv4zDb++w2PmN/cNzxQyItHmz/H1s835XMJNEHWZJUaBrkpTs2EkOqNA5eRvOzeztatlU3lbc cfRZmmjnil3FXu5V7jSXj3/DC3dngd2+eTG161BeJvhM35UkKJGAELhXxQDg== X-Developer-Key: i=neil.armstrong@linaro.org; a=openpgp; fpr=89EC3D058446217450F22848169AB7B1A4CFF8AE Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@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 d35169cbb499..4f017555bd5b 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 921a2da0c2be..29524e8a83db 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 ");