From patchwork Wed Aug 12 07:19:22 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 11710389 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1FA92109B for ; Wed, 12 Aug 2020 07:20:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F1FB9207DE for ; Wed, 12 Aug 2020 07:20:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="F3p9qfjG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726935AbgHLHU0 (ORCPT ); Wed, 12 Aug 2020 03:20:26 -0400 Received: from mail29.static.mailgun.info ([104.130.122.29]:23143 "EHLO mail29.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726971AbgHLHUZ (ORCPT ); Wed, 12 Aug 2020 03:20:25 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1597216824; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=B8dC8bKg62qDnCCEH0ZoUfIey6uyB8lC6WcSZ2ejwd0=; b=F3p9qfjGo15BJx5r/pz/ifHSDQT1MuRo3pgfp+lbCNvD/I80N7KCWoKDqh4zozEirXP1WCGx +yi7HUenOqza/LvDPrxhu5fIHV24cdLoMLe/YYZK9zqQ9C1vueANSJiQYfi0niOoKJVc5rwz gxl63by2yE93WeB71ZtBJmSelkc= X-Mailgun-Sending-Ip: 104.130.122.29 X-Mailgun-Sid: WyIxZTE2YSIsICJsaW51eC11c2JAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n12.prod.us-west-2.postgun.com with SMTP id 5f33981b1e4d3989d44ef9c9 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Wed, 12 Aug 2020 07:19:55 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 64C45C433A0; Wed, 12 Aug 2020 07:19:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.0 Received: from wcheng-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: wcheng) by smtp.codeaurora.org (Postfix) with ESMTPSA id 6B163C433CA; Wed, 12 Aug 2020 07:19:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 6B163C433CA Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=wcheng@codeaurora.org From: Wesley Cheng To: sboyd@kernel.org, heikki.krogerus@linux.intel.com, agross@kernel.org, robh+dt@kernel.org, gregkh@linuxfoundation.org, bjorn.andersson@linaro.org Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Wesley Cheng Subject: [PATCH v8 1/4] usb: typec: Add QCOM PMIC typec detection driver Date: Wed, 12 Aug 2020 00:19:22 -0700 Message-Id: <20200812071925.315-2-wcheng@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200812071925.315-1-wcheng@codeaurora.org> References: <20200812071925.315-1-wcheng@codeaurora.org> MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The QCOM SPMI typec driver handles the role and orientation detection, and notifies client drivers using the USB role switch framework. It registers as a typec port, so orientation can be communicated using the typec switch APIs. The driver also attains a handle to the VBUS output regulator, so it can enable/disable the VBUS source when acting as a host/device. Signed-off-by: Wesley Cheng Acked-by: Heikki Krogerus Reviewed-by: Stephen Boyd --- drivers/usb/typec/Kconfig | 12 ++ drivers/usb/typec/Makefile | 1 + drivers/usb/typec/qcom-pmic-typec.c | 271 ++++++++++++++++++++++++++++ 3 files changed, 284 insertions(+) create mode 100644 drivers/usb/typec/qcom-pmic-typec.c diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig index 559dd06117e7..63789cf88fce 100644 --- a/drivers/usb/typec/Kconfig +++ b/drivers/usb/typec/Kconfig @@ -73,6 +73,18 @@ config TYPEC_TPS6598X If you choose to build this driver as a dynamically linked module, the module will be called tps6598x.ko. +config TYPEC_QCOM_PMIC + tristate "Qualcomm PMIC USB Type-C driver" + depends on ARCH_QCOM || COMPILE_TEST + help + Driver for supporting role switch over the Qualcomm PMIC. This will + handle the USB Type-C role and orientation detection reported by the + QCOM PMIC if the PMIC has the capability to handle USB Type-C + detection. + + It will also enable the VBUS output to connected devices when a + DFP connection is made. + source "drivers/usb/typec/mux/Kconfig" source "drivers/usb/typec/altmodes/Kconfig" diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile index 7753a5c3cd46..cceffd987643 100644 --- a/drivers/usb/typec/Makefile +++ b/drivers/usb/typec/Makefile @@ -6,4 +6,5 @@ obj-$(CONFIG_TYPEC_TCPM) += tcpm/ obj-$(CONFIG_TYPEC_UCSI) += ucsi/ obj-$(CONFIG_TYPEC_HD3SS3220) += hd3ss3220.o obj-$(CONFIG_TYPEC_TPS6598X) += tps6598x.o +obj-$(CONFIG_TYPEC_QCOM_PMIC) += qcom-pmic-typec.o obj-$(CONFIG_TYPEC) += mux/ diff --git a/drivers/usb/typec/qcom-pmic-typec.c b/drivers/usb/typec/qcom-pmic-typec.c new file mode 100644 index 000000000000..20b2b6502cb3 --- /dev/null +++ b/drivers/usb/typec/qcom-pmic-typec.c @@ -0,0 +1,271 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2020, The Linux Foundation. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define TYPEC_MISC_STATUS 0xb +#define CC_ATTACHED BIT(0) +#define CC_ORIENTATION BIT(1) +#define SNK_SRC_MODE BIT(6) +#define TYPEC_MODE_CFG 0x44 +#define TYPEC_DISABLE_CMD BIT(0) +#define EN_SNK_ONLY BIT(1) +#define EN_SRC_ONLY BIT(2) +#define TYPEC_VCONN_CONTROL 0x46 +#define VCONN_EN_SRC BIT(0) +#define VCONN_EN_VAL BIT(1) +#define TYPEC_EXIT_STATE_CFG 0x50 +#define SEL_SRC_UPPER_REF BIT(2) +#define TYPEC_INTR_EN_CFG_1 0x5e +#define TYPEC_INTR_EN_CFG_1_MASK GENMASK(7, 0) + +struct qcom_pmic_typec { + struct device *dev; + struct fwnode_handle *fwnode; + struct regmap *regmap; + u32 base; + + struct typec_capability *cap; + struct typec_port *port; + struct usb_role_switch *role_sw; + + struct regulator *vbus_reg; + bool vbus_enabled; +}; + +static void qcom_pmic_typec_enable_vbus_regulator(struct qcom_pmic_typec + *qcom_usb, bool enable) +{ + int ret; + + if (enable == qcom_usb->vbus_enabled) + return; + + if (!qcom_usb->vbus_reg) { + qcom_usb->vbus_reg = devm_regulator_get(qcom_usb->dev, + "usb_vbus"); + if (IS_ERR(qcom_usb->vbus_reg)) { + qcom_usb->vbus_reg = NULL; + return; + } + } + + if (enable) { + ret = regulator_enable(qcom_usb->vbus_reg); + if (ret) + return; + } else { + ret = regulator_disable(qcom_usb->vbus_reg); + if (ret) + return; + } + qcom_usb->vbus_enabled = enable; +} + +static void qcom_pmic_typec_check_connection(struct qcom_pmic_typec *qcom_usb) +{ + enum typec_orientation orientation; + enum usb_role role; + unsigned int stat; + bool enable_vbus; + + regmap_read(qcom_usb->regmap, qcom_usb->base + TYPEC_MISC_STATUS, + &stat); + + if (stat & CC_ATTACHED) { + orientation = (stat & CC_ORIENTATION) ? + TYPEC_ORIENTATION_REVERSE : + TYPEC_ORIENTATION_NORMAL; + typec_set_orientation(qcom_usb->port, orientation); + + role = (stat & SNK_SRC_MODE) ? USB_ROLE_HOST : USB_ROLE_DEVICE; + if (role == USB_ROLE_HOST) + enable_vbus = true; + else + enable_vbus = false; + } else { + role = USB_ROLE_NONE; + enable_vbus = false; + } + + qcom_pmic_typec_enable_vbus_regulator(qcom_usb, enable_vbus); + usb_role_switch_set_role(qcom_usb->role_sw, role); +} + +static irqreturn_t qcom_pmic_typec_interrupt(int irq, void *_qcom_usb) +{ + struct qcom_pmic_typec *qcom_usb = _qcom_usb; + + qcom_pmic_typec_check_connection(qcom_usb); + return IRQ_HANDLED; +} + +static void qcom_pmic_typec_typec_hw_init(struct qcom_pmic_typec *qcom_usb) +{ + u8 mode = 0; + + regmap_update_bits(qcom_usb->regmap, + qcom_usb->base + TYPEC_INTR_EN_CFG_1, + TYPEC_INTR_EN_CFG_1_MASK, 0); + + if (qcom_usb->cap->type != TYPEC_PORT_DRP) + mode = (qcom_usb->cap->type == TYPEC_PORT_SNK) ? + EN_SNK_ONLY : EN_SRC_ONLY; + regmap_update_bits(qcom_usb->regmap, qcom_usb->base + TYPEC_MODE_CFG, + EN_SNK_ONLY | EN_SRC_ONLY, mode); + + regmap_update_bits(qcom_usb->regmap, + qcom_usb->base + TYPEC_VCONN_CONTROL, + VCONN_EN_SRC | VCONN_EN_VAL, VCONN_EN_SRC); + regmap_update_bits(qcom_usb->regmap, + qcom_usb->base + TYPEC_EXIT_STATE_CFG, + SEL_SRC_UPPER_REF, SEL_SRC_UPPER_REF); +} + +static int qcom_pmic_typec_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct qcom_pmic_typec *qcom_usb; + struct typec_capability *cap; + const char *buf; + int ret, irq, role; + u32 reg; + + ret = device_property_read_u32(dev, "reg", ®); + if (ret < 0) { + dev_err(dev, "missing base address\n"); + return ret; + } + + qcom_usb = devm_kzalloc(dev, sizeof(*qcom_usb), GFP_KERNEL); + if (!qcom_usb) + return -ENOMEM; + + qcom_usb->dev = dev; + qcom_usb->base = reg; + + qcom_usb->regmap = dev_get_regmap(dev->parent, NULL); + if (!qcom_usb->regmap) { + dev_err(dev, "Failed to get regmap\n"); + return -EINVAL; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return -EINVAL; + + ret = devm_request_threaded_irq(qcom_usb->dev, irq, NULL, + qcom_pmic_typec_interrupt, IRQF_ONESHOT, + "qcom-pmic-typec", qcom_usb); + if (ret) { + dev_err(&pdev->dev, "Could not request IRQ\n"); + return ret; + } + + qcom_usb->fwnode = device_get_named_child_node(dev, "connector"); + if (!qcom_usb->fwnode) + return -EINVAL; + + cap = devm_kzalloc(dev, sizeof(*cap), GFP_KERNEL); + if (!cap) { + ret = -ENOMEM; + goto err_put_node; + } + + ret = fwnode_property_read_string(qcom_usb->fwnode, "power-role", &buf); + if (!ret) { + role = typec_find_port_power_role(buf); + if (role < 0) + role = TYPEC_PORT_SNK; + } else { + role = TYPEC_PORT_SNK; + } + cap->type = role; + + ret = fwnode_property_read_string(qcom_usb->fwnode, "data-role", &buf); + if (!ret) { + role = typec_find_port_data_role(buf); + if (role < 0) + role = TYPEC_PORT_UFP; + } else { + role = TYPEC_PORT_UFP; + } + cap->data = role; + + cap->prefer_role = TYPEC_NO_PREFERRED_ROLE; + cap->fwnode = qcom_usb->fwnode; + qcom_usb->port = typec_register_port(dev, cap); + if (IS_ERR(qcom_usb->port)) { + ret = PTR_ERR(qcom_usb->port); + dev_err(dev, "Failed to register type c port %d\n", ret); + goto err_put_node; + } + + qcom_usb->cap = cap; + + qcom_usb->role_sw = fwnode_usb_role_switch_get(qcom_usb->fwnode); + if (IS_ERR(qcom_usb->role_sw)) { + if (PTR_ERR(qcom_usb->role_sw) != -EPROBE_DEFER) + dev_err(dev, "failed to get role switch\n"); + ret = PTR_ERR(qcom_usb->role_sw); + goto err_typec_port; + } + + platform_set_drvdata(pdev, qcom_usb); + qcom_pmic_typec_typec_hw_init(qcom_usb); + qcom_pmic_typec_check_connection(qcom_usb); + + return 0; + +err_typec_port: + typec_unregister_port(qcom_usb->port); +err_put_node: + fwnode_handle_put(qcom_usb->fwnode); + + return ret; +} + +static int qcom_pmic_typec_remove(struct platform_device *pdev) +{ + struct qcom_pmic_typec *qcom_usb = platform_get_drvdata(pdev); + + usb_role_switch_set_role(qcom_usb->role_sw, USB_ROLE_NONE); + qcom_pmic_typec_enable_vbus_regulator(qcom_usb, 0); + + typec_unregister_port(qcom_usb->port); + usb_role_switch_put(qcom_usb->role_sw); + fwnode_handle_put(qcom_usb->fwnode); + + return 0; +} + +static const struct of_device_id qcom_pmic_typec_table[] = { + { .compatible = "qcom,pm8150b-usb-typec" }, + { } +}; +MODULE_DEVICE_TABLE(of, qcom_pmic_typec_table); + +static struct platform_driver qcom_pmic_typec = { + .driver = { + .name = "qcom,pmic-typec", + .of_match_table = qcom_pmic_typec_table, + }, + .probe = qcom_pmic_typec_probe, + .remove = qcom_pmic_typec_remove, +}; +module_platform_driver(qcom_pmic_typec); + +MODULE_DESCRIPTION("QCOM PMIC USB type C driver"); +MODULE_LICENSE("GPL v2");