From patchwork Tue May 28 20:44:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 13677421 Received: from mail-lj1-f182.google.com (mail-lj1-f182.google.com [209.85.208.182]) (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 951B617B410 for ; Tue, 28 May 2024 20:44:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.182 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716929101; cv=none; b=c2KJ9dnSfXU6j8FrXjIMTJl8rA5+l7HcfPoeYAj1mmKLjvqtQvNYQYPjNZHEGR5ULI81mi2PY3yUitGifKX/VBaNs+7sJwN8EoBRpsheZwUPul9tzQB7N9SG4I63kb+kV/qJKyJQcJfcu0NNRtTI89uizONxShG00/QP0fEV6os= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716929101; c=relaxed/simple; bh=9TzMr4Rk7UoqG9pBwIioYwk7quFk4Q3NDC6Ibx0+hjU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=R/HABdG5WIkE+Y4jEf+AdIDc2fLjbCCUaABZUdj8D6J2DE4L87GF6DhXNYWMsE2IrI08HSyMzJOmjt9Tb+Cnofj//s1Zj/LJ+Asy3rWYjmMXEDK29i2O13dYyBtSr/NgWk+1I/FhOITp+BIi3oZtPB0dPyQgfrQwydqoqbHTZ70= 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=IDIHYRX0; arc=none smtp.client-ip=209.85.208.182 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="IDIHYRX0" Received: by mail-lj1-f182.google.com with SMTP id 38308e7fff4ca-2e9819a630fso20353531fa.1 for ; Tue, 28 May 2024 13:44:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1716929097; x=1717533897; 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=YU7aU+1NDUYh6foJyF26h+ha4Rk59XBh0mnrzCaH2jQ=; b=IDIHYRX0spwMhp4SU6U9m3bfkeaaFtLQNMhRSpHOHYffnFCViDCXe5URQXByDfc4EU r+5GsgJ35XQGn2nIHFLdMX8egAh9XEJgLMyo59NAYabmuM4UOFoD3+fFNGgDP9UWWDl4 QxDZa7+tZx9K72D2RoHBx3AvKLT7bxFRcWyAiX9p9b+JaVDEm3JYdmHEaNjnBO47/bap k279JKBErijg7lMt1bh69WX4fmIaSE8Y5IgpbJSLnI6zR7LWB9hjA50zNUqXGX1+Qiq0 MbBsPunThMxsbwRdaHyaXTMjGl9FKyeqgTFfTGikGT/JAaAi28yyzPLa8/vWQZaGOI0Q wb0w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716929097; x=1717533897; 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=YU7aU+1NDUYh6foJyF26h+ha4Rk59XBh0mnrzCaH2jQ=; b=Si8eJCUG4pWQvw8EvGvZv35HXAtRmwqnLXiSTV1gIIrmvZujk9WVtiK5Jx6CG8Evvv tTKVLUDT9sc+nADyWiyExKqceykgvl7UuO/Ba0U0/MaMqNkT2Qg3aixQTyhuFURz1oN5 NQO+ceOEr2bX4RT0ftl80qH1Bmj3O80t1kd8jCEJUndyTZ7RkB3qrkWa/F5Uvby4nSDN JfPt6JDp76AFLikcMYa/JHAHf66n0HDCa00mhjHKdb/d0SsdMDfVFMXJ4R/sqUWLpNa2 7In7ParvkRVO+9nb88Pe7/1bCMyZ21H9jhYFU+/nozn/3glZacX8tBTn0PTuCG5beexB QY3g== X-Forwarded-Encrypted: i=1; AJvYcCUxsRK6pgXWPZT+MORHbKrlEm4SNG4IGHYkPhHbTJjyrB/Lp7X/qB0Bd0Xl2a31ilFPOXUmvkKNMG8kP14UPOiLiDOSnLLWPGytmWtrfmWUaAGkxw== X-Gm-Message-State: AOJu0YzwO1NzfuRvbW3redzTx3N9Eji6NUzrJ/kE50WOrnJitWtJM/9s Szk/I93DlHXvzL0fmM5T0k9QNmrqmjLZm5wCeA/Oor/dPdtM8I/BoguAmvsdGl0= X-Google-Smtp-Source: AGHT+IEJM6cq/cxbjafwrQqwNXpwdkrB4lRBkWh+htdB5VGEkJlIQaEEiRn3gvB5vgCPlLOdtrDBFA== X-Received: by 2002:a2e:2404:0:b0:2e2:812:4c4 with SMTP id 38308e7fff4ca-2e95b0c2359mr96454881fa.29.1716929096816; Tue, 28 May 2024 13:44:56 -0700 (PDT) Received: from umbar.lan ([192.130.178.91]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-2e95bdcd21esm22759431fa.100.2024.05.28.13.44.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 May 2024 13:44:56 -0700 (PDT) From: Dmitry Baryshkov Date: Tue, 28 May 2024 23:44:48 +0300 Subject: [PATCH v4 3/6] usb: typec: ucsi: add Lenovo Yoga C630 glue driver Precedence: bulk X-Mailing-List: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240528-yoga-ec-driver-v4-3-4fa8dfaae7b6@linaro.org> References: <20240528-yoga-ec-driver-v4-0-4fa8dfaae7b6@linaro.org> In-Reply-To: <20240528-yoga-ec-driver-v4-0-4fa8dfaae7b6@linaro.org> To: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Bryan O'Donoghue , Heikki Krogerus , Greg Kroah-Hartman , Konrad Dybcio Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-usb@vger.kernel.org, linux-arm-msm@vger.kernel.org, Nikita Travkin X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=6860; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=9TzMr4Rk7UoqG9pBwIioYwk7quFk4Q3NDC6Ibx0+hjU=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBmVkJFJLRQYs9y2nhR92Fpq0JsWpuvQaLkpP+bj MfTOSE7HyyJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZlZCRQAKCRCLPIo+Aiko 1UE3B/9uOeYZUGbqZypEF3JEGkyC8eign0tcQ2NsOqQ5timKYqVHdhHvAdgAejnPDz4BNYP/4QQ kBkEG0VTEnUE6RevHseOelyJ18e4pP3ze1QRPpPYBs/OQpMhvj2fxh54APA97dyG9Z+71+45ebJ 5+vlohuYkyBvcFn+ugca/pUm2L5rtI/0AaS1hPKf4KwlHN/ad4ezy71R5VK6jRyPxa/c79cZ81E /VHbPvrJSiz5QQXCEQc5szeZr4SY487GyQdCNylGpCLToBp3ry63Q4VOh9RsuU8r9a7V/FQdEtQ Kao3oacL5Gfp5uBRIJZybfg76d1x5iRWmjqgJ95Tp9o9VWBM X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A The Lenovo Yoga C630 WOS laptop provides implements UCSI interface in the onboard EC. Add glue driver to interface the platform's UCSI implementation. Signed-off-by: Dmitry Baryshkov Reviewed-by: Bryan O'Donoghue --- drivers/usb/typec/ucsi/Kconfig | 9 ++ drivers/usb/typec/ucsi/Makefile | 1 + drivers/usb/typec/ucsi/ucsi_yoga_c630.c | 189 ++++++++++++++++++++++++++++++++ 3 files changed, 199 insertions(+) diff --git a/drivers/usb/typec/ucsi/Kconfig b/drivers/usb/typec/ucsi/Kconfig index bdcb1764cfae..680e1b87b152 100644 --- a/drivers/usb/typec/ucsi/Kconfig +++ b/drivers/usb/typec/ucsi/Kconfig @@ -69,4 +69,13 @@ config UCSI_PMIC_GLINK To compile the driver as a module, choose M here: the module will be called ucsi_glink. +config UCSI_LENOVO_YOGA_C630 + tristate "UCSI Interface Driver for Lenovo Yoga C630" + depends on EC_LENOVO_YOGA_C630 + help + This driver enables UCSI support on the Lenovo Yoga C630 laptop. + + To compile the driver as a module, choose M here: the module will be + called ucsi_yoga_c630. + endif diff --git a/drivers/usb/typec/ucsi/Makefile b/drivers/usb/typec/ucsi/Makefile index b4679f94696b..aed41d23887b 100644 --- a/drivers/usb/typec/ucsi/Makefile +++ b/drivers/usb/typec/ucsi/Makefile @@ -21,3 +21,4 @@ obj-$(CONFIG_UCSI_ACPI) += ucsi_acpi.o obj-$(CONFIG_UCSI_CCG) += ucsi_ccg.o obj-$(CONFIG_UCSI_STM32G0) += ucsi_stm32g0.o obj-$(CONFIG_UCSI_PMIC_GLINK) += ucsi_glink.o +obj-$(CONFIG_UCSI_LENOVO_YOGA_C630) += ucsi_yoga_c630.o diff --git a/drivers/usb/typec/ucsi/ucsi_yoga_c630.c b/drivers/usb/typec/ucsi/ucsi_yoga_c630.c new file mode 100644 index 000000000000..ca1ab5c81b87 --- /dev/null +++ b/drivers/usb/typec/ucsi/ucsi_yoga_c630.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022-2024, Linaro Ltd + * Authors: + * Bjorn Andersson + * Dmitry Baryshkov + */ +#include +#include +#include + +#include "ucsi.h" + +struct yoga_c630_ucsi { + struct yoga_c630_ec *ec; + struct ucsi *ucsi; + struct notifier_block nb; + struct completion complete; + unsigned long flags; +#define UCSI_C630_COMMAND_PENDING 0 +#define UCSI_C630_ACK_PENDING 1 + u16 version; +}; + +static int yoga_c630_ucsi_read(struct ucsi *ucsi, unsigned int offset, + void *val, size_t val_len) +{ + struct yoga_c630_ucsi *uec = ucsi_get_drvdata(ucsi); + u8 buf[YOGA_C630_UCSI_READ_SIZE]; + int ret; + + ret = yoga_c630_ec_ucsi_read(uec->ec, buf); + if (ret) + return ret; + + if (offset == UCSI_VERSION) { + memcpy(val, &uec->version, min(val_len, sizeof(uec->version))); + return 0; + } + + if (offset == UCSI_CCI) + memcpy(val, buf, + min(val_len, YOGA_C630_UCSI_CCI_SIZE)); + else if (offset == UCSI_MESSAGE_IN) + memcpy(val, buf + YOGA_C630_UCSI_CCI_SIZE, + min(val_len, YOGA_C630_UCSI_DATA_SIZE)); + else + return -EINVAL; + + return 0; +} + +static int yoga_c630_ucsi_async_write(struct ucsi *ucsi, unsigned int offset, + const void *val, size_t val_len) +{ + struct yoga_c630_ucsi *uec = ucsi_get_drvdata(ucsi); + + if (offset != UCSI_CONTROL || + val_len != YOGA_C630_UCSI_WRITE_SIZE) + return -EINVAL; + + return yoga_c630_ec_ucsi_write(uec->ec, val); +} + +static int yoga_c630_ucsi_sync_write(struct ucsi *ucsi, unsigned int offset, + const void *val, size_t val_len) +{ + struct yoga_c630_ucsi *uec = ucsi_get_drvdata(ucsi); + bool ack = UCSI_COMMAND(*(u64 *)val) == UCSI_ACK_CC_CI; + int ret; + + if (ack) + set_bit(UCSI_C630_ACK_PENDING, &uec->flags); + else + set_bit(UCSI_C630_COMMAND_PENDING, &uec->flags); + + reinit_completion(&uec->complete); + + ret = yoga_c630_ucsi_async_write(ucsi, offset, val, val_len); + if (ret) + goto out_clear_bit; + + if (!wait_for_completion_timeout(&uec->complete, 5 * HZ)) + ret = -ETIMEDOUT; + +out_clear_bit: + if (ack) + clear_bit(UCSI_C630_ACK_PENDING, &uec->flags); + else + clear_bit(UCSI_C630_COMMAND_PENDING, &uec->flags); + + return ret; +} + +const struct ucsi_operations yoga_c630_ucsi_ops = { + .read = yoga_c630_ucsi_read, + .sync_write = yoga_c630_ucsi_sync_write, + .async_write = yoga_c630_ucsi_async_write, +}; + +static int yoga_c630_ucsi_notify(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct yoga_c630_ucsi *uec = container_of(nb, struct yoga_c630_ucsi, nb); + u32 cci; + int ret; + + if (action == LENOVO_EC_EVENT_USB || action == LENOVO_EC_EVENT_HPD) { + ucsi_connector_change(uec->ucsi, 1); + return NOTIFY_OK; + } + + if (action != LENOVO_EC_EVENT_UCSI) + return NOTIFY_DONE; + + ret = uec->ucsi->ops->read(uec->ucsi, UCSI_CCI, &cci, sizeof(cci)); + if (ret) + return NOTIFY_DONE; + + if (UCSI_CCI_CONNECTOR(cci)) + ucsi_connector_change(uec->ucsi, UCSI_CCI_CONNECTOR(cci)); + + if (cci & UCSI_CCI_ACK_COMPLETE && + test_bit(UCSI_C630_ACK_PENDING, &uec->flags)) + complete(&uec->complete); + if (cci & UCSI_CCI_COMMAND_COMPLETE && + test_bit(UCSI_C630_COMMAND_PENDING, &uec->flags)) + complete(&uec->complete); + + return NOTIFY_OK; +} + +static int yoga_c630_ucsi_probe(struct auxiliary_device *adev, + const struct auxiliary_device_id *id) +{ + struct yoga_c630_ec *ec = adev->dev.platform_data; + struct yoga_c630_ucsi *uec; + int ret; + + uec = devm_kzalloc(&adev->dev, sizeof(*uec), GFP_KERNEL); + if (!uec) + return -ENOMEM; + + uec->ec = ec; + init_completion(&uec->complete); + uec->nb.notifier_call = yoga_c630_ucsi_notify; + + uec->ucsi = ucsi_create(&adev->dev, &yoga_c630_ucsi_ops); + if (IS_ERR(uec->ucsi)) + return PTR_ERR(uec->ucsi); + + ucsi_set_drvdata(uec->ucsi, uec); + + uec->version = yoga_c630_ec_ucsi_get_version(uec->ec); + + auxiliary_set_drvdata(adev, uec); + + ret = yoga_c630_ec_register_notify(ec, &uec->nb); + if (ret) + return ret; + + return ucsi_register(uec->ucsi); +} + +static void yoga_c630_ucsi_remove(struct auxiliary_device *adev) +{ + struct yoga_c630_ucsi *uec = auxiliary_get_drvdata(adev); + + yoga_c630_ec_unregister_notify(uec->ec, &uec->nb); + ucsi_unregister(uec->ucsi); +} + +static const struct auxiliary_device_id yoga_c630_ucsi_id_table[] = { + { .name = YOGA_C630_MOD_NAME "." YOGA_C630_DEV_UCSI, }, + {} +}; +MODULE_DEVICE_TABLE(auxiliary, yoga_c630_ucsi_id_table); + +static struct auxiliary_driver yoga_c630_ucsi_driver = { + .name = YOGA_C630_DEV_UCSI, + .id_table = yoga_c630_ucsi_id_table, + .probe = yoga_c630_ucsi_probe, + .remove = yoga_c630_ucsi_remove, +}; + +module_auxiliary_driver(yoga_c630_ucsi_driver); + +MODULE_DESCRIPTION("Lenovo Yoga C630 UCSI"); +MODULE_LICENSE("GPL");