From patchwork Mon Jan 29 09:16:38 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neil Armstrong X-Patchwork-Id: 767549 Received: from mail-wr1-f47.google.com (mail-wr1-f47.google.com [209.85.221.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4F0215578B for ; Mon, 29 Jan 2024 09:16:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.47 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706519807; cv=none; b=SESz+R/yB1sreFMD73XHtkyiexL2bIidCkxmN2ougJR2dZzpiJ7j4zKyFDXxIY/dCfUNp1pU1Ruq1dm53i9Y/trCPWIfSMY/k+JB72ZSNaakuZnXrLEEiJvPTWfWbNU6Vko4Jsg5tG0jnxMh0a1OitXrjBdXaGIKW79SOfnUrjA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706519807; c=relaxed/simple; bh=4NyS6D5Qofbhb2SQAREqrd3GswVI2CZPZl6TmOTm0fg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=VxhVA7iJI46jHtKXPs3p/tpTIsnuE1iTl2Y2q/e9RD0SqecxnTbU8U4nmO0dhPASlLO1xcPMpiifi0wmsBTs8MnMZlt/SVBIkp0PBXLvPAKvsysjGMET/HQjoaAAPNfTbmnh4RljFTfYLgJ15sTjgf+HMIKRlsm0agix9Yrcl/M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=bGSacqq4; arc=none smtp.client-ip=209.85.221.47 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="bGSacqq4" Received: by mail-wr1-f47.google.com with SMTP id ffacd0b85a97d-33ae3be1c37so712304f8f.0 for ; Mon, 29 Jan 2024 01:16:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1706519803; x=1707124603; darn=vger.kernel.org; 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=OetDTW52ox4JEw6CgWxlaDanXL4m3ZtE503VRTXSSV0=; b=bGSacqq4Bx/uMFuFjpUFcHJoEkn2OgkQJqGWiIaqbfBtbUNhBXuU0WUKTp6hw3ened nbc1ZqxqqAdd+FkPuXF1Ed9dtzqpgZdBspHdjpxX6TTqvBSOxPpEa/BUAfsYQrfz7ctL 02eLLu0ahmApjSkEzHJK6xeo+z+jnWoiGjIOtdXF5wwN4JIMBJFED4yZKeM8qXJlsbPx pHdk1zwFchR/11hv8uGMtH0X2mgnjF9zsD/hIiIxxzVgoARbsqVXx+AbuMO5RrQWCmUg Gn5nt0mZl8tnvcQhq3g3b+USOcrCFhUjWjESQ7OgUFWY1sE9ovXZV1BrhrUUvwtbtxlG IIbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1706519803; x=1707124603; 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=OetDTW52ox4JEw6CgWxlaDanXL4m3ZtE503VRTXSSV0=; b=IXdDZF48fIZRmlZPO4E0Szah1rOGEn0lozeD1eCgpgSUMA0CCt7CgDM55meJdDY36Q qM2E6DHuDf6S4Ex38DR/TCM31/rnBQXs+GWoiGvBgFGWs/LWdfoRxM5iHg2wgbRj6a6q VqSaoS13ro3LzgnBw7ncsfszszRTGGq6W3oFzt9gT2kdfWeF64Ah1eW7tMHI3nGBum7u uFUegpm9FpabiqLf6RLyCHgjGW3c2Ntssw99jtFUZFIvRH+2+1PAzo5nTF3UMoejYy/g nq+P832cJfBq4uuVF7umZr7sxeWTmAcXGxMCltUCpj8oJ0LQKCMmJe4rs4HEGYiZKDk+ E8qg== X-Gm-Message-State: AOJu0YznpJxorF4JqMnSQ3NAspSL6jq9BP74rmDxOTPLcaZvVq8ZX0oL 8tkgtZAk0x3Hu354s2E3/ReFFJ9T85kwmydM102WvE84J/RVyISlElJ9O3RZSII= X-Google-Smtp-Source: AGHT+IHEaVC3jg0Z/Kp44EOxFGL3kQrfQN2WdpS3j0NCaOlBXdoSrOYL0T27GepzO98iWarPzWHftA== X-Received: by 2002:adf:e943:0:b0:33a:e653:96b with SMTP id m3-20020adfe943000000b0033ae653096bmr3622091wrn.21.1706519803632; Mon, 29 Jan 2024 01:16:43 -0800 (PST) Received: from arrakeen.starnux.net ([2a01:e0a:982:cbb0:8261:5fff:fe11:bdda]) by smtp.gmail.com with ESMTPSA id b7-20020adfee87000000b0033aebf727b2sm2818198wro.60.2024.01.29.01.16.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Jan 2024 01:16:43 -0800 (PST) From: Neil Armstrong Date: Mon, 29 Jan 2024 10:16:38 +0100 Subject: [PATCH v15 4/4] Input: goodix-berlin - add SPI support for Goodix Berlin Touchscreen IC Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240129-topic-goodix-berlin-upstream-initial-v15-4-6f7d096c0a0a@linaro.org> References: <20240129-topic-goodix-berlin-upstream-initial-v15-0-6f7d096c0a0a@linaro.org> In-Reply-To: <20240129-topic-goodix-berlin-upstream-initial-v15-0-6f7d096c0a0a@linaro.org> To: Dmitry Torokhov , linux-input@vger.kernel.org Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bastien Nocera , Hans de Goede , Henrik Rydberg , Jeff LaBundy , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Neil Armstrong X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; l=8094; i=neil.armstrong@linaro.org; h=from:subject:message-id; bh=4NyS6D5Qofbhb2SQAREqrd3GswVI2CZPZl6TmOTm0fg=; b=owEBbQKS/ZANAwAKAXfc29rIyEnRAcsmYgBlt2z1cpm+XgwSsKJqACAF9VCd+DXrdfVhLpXTNrTK FkuPRjqJAjMEAAEKAB0WIQQ9U8YmyFYF/h30LIt33NvayMhJ0QUCZbds9QAKCRB33NvayMhJ0X4uD/ 9kECfHMz3XFjUBoZGyXTqaPvK2Qq7u3SsFbaHNfNK1Gl1ZDeLnh5HgFk4CsYtzxW8vcDYk9UpMJXFf E1Je5QPfnTel6SyyYb4UtxG+GPpWDikIH3K9tROaDm77dyjmrqhEv95I9z06JBYtWPvgK8Rwvu2V5W hF02P9NjxWs5ItZitRYZjrqUl7dg9Z37XDIhrbRFhiPKJvzcRhbfUuZpMDiSgVr8ZxhhtTuiFxpvyY Z7hu4Orao5OKEF/MOWKsieUq2Ov+MJB+Cn5AeoKrtQlbdrLsh3asLjLuB5Hf7ZsI8cG67XfzZjpYPh NC96kchL0VMx7gwcNQt5V1F1douVleCqCvQU2+KvAGpgPpSPSBiaazsAC03va4iFfthOp4cF2YPz+8 F0LSfIerlc3qfs+w5R3h/lVkOQya6L+4wQFhP+vhId5cFQPB6Ymogh+qp7zDG5y472wlcp/dR3LuTz HYIKZMslpuaE1MIIofrw77LzHbfH5ahW7K9lwRbLX0o06PSv0Ia96NsRW7VYVExdRyEuBt6UYOWT1Z KjMeIyFVtkSQ7ecDE6E4hFdJ9NtuShE/Liu3vfYD6FDxDLPctQXjbYuLWAS/LppPs0IC1+Y9NYfGV0 7gdMCnVe7R1EWAMsGckJDwGtQDWfWdAlj9uDYwcRzLrjwgA0Hc6CNRxE54xA== X-Developer-Key: i=neil.armstrong@linaro.org; a=openpgp; fpr=89EC3D058446217450F22848169AB7B1A4CFF8AE 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 | 178 ++++++++++++++++++++++++++ 3 files changed, 193 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..4cc557da048a --- /dev/null +++ b/drivers/input/touchscreen/goodix_berlin_spi.c @@ -0,0 +1,178 @@ +// 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 + +#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); + + error = goodix_berlin_probe(&spi->dev, spi->irq, + &goodix_berlin_spi_input_id, regmap); + if (error) + return error; + + return 0; +} + +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 ");