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Tue, 30 Jul 2024 22:24:42 +0000 Received: from NALASPPMTA05.qualcomm.com (NALASPPMTA05.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 46UMOf3p002449; Tue, 30 Jul 2024 22:24:41 GMT Received: from hu-devc-lv-u18-c.qualcomm.com (hu-eserrao-lv.qualcomm.com [10.47.235.27]) by NALASPPMTA05.qualcomm.com (PPS) with ESMTP id 46UMOf6E002445; Tue, 30 Jul 2024 22:24:41 +0000 Received: by hu-devc-lv-u18-c.qualcomm.com (Postfix, from userid 464172) id AB988500188; Tue, 30 Jul 2024 15:24:41 -0700 (PDT) From: Elson Roy Serrao To: andersson@kernel.org, konrad.dybcio@linaro.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, gregkh@linuxfoundation.org Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Elson Roy Serrao Subject: [PATCH 1/8] dt-bindings: soc: qcom: eud: Add phy related bindings Date: Tue, 30 Jul 2024 15:24:32 -0700 Message-Id: <20240730222439.3469-2-quic_eserrao@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240730222439.3469-1-quic_eserrao@quicinc.com> References: <20240730222439.3469-1-quic_eserrao@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: 27TQEd7jelb51tbnaoctfVZeQf5F33V4 X-Proofpoint-ORIG-GUID: 27TQEd7jelb51tbnaoctfVZeQf5F33V4 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-30_18,2024-07-30_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 mlxscore=0 priorityscore=1501 adultscore=0 mlxlogscore=961 clxscore=1011 impostorscore=0 spamscore=0 lowpriorityscore=0 bulkscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2407300154 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Embedded USB Debugger(EUD) being a High-Speed USB hub needs HS-Phy support for it's operation. Hence document phy bindings to support this. Signed-off-by: Elson Roy Serrao --- .../devicetree/bindings/soc/qcom/qcom,eud.yaml | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml index f2c5ec7e6437..fca5b608ec63 100644 --- a/Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml @@ -29,6 +29,14 @@ properties: description: EUD interrupt maxItems: 1 + phys: + items: + - description: USB2/HS PHY needed for EUD functionality + + phy-names: + items: + - const: usb2-phy + ports: $ref: /schemas/graph.yaml#/properties/ports description: @@ -48,6 +56,8 @@ properties: required: - compatible - reg + - phys + - phy-names - ports additionalProperties: false @@ -58,6 +68,8 @@ examples: compatible = "qcom,sc7280-eud", "qcom,eud"; reg = <0x88e0000 0x2000>, <0x88e2000 0x1000>; + phys = <&usb_2_hsphy>; + phy-names = "usb2-phy"; ports { #address-cells = <1>; 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Tue, 30 Jul 2024 22:24:42 +0000 Received: from NALASPPMTA01.qualcomm.com (NALASPPMTA01.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 46UMGpPO012780; Tue, 30 Jul 2024 22:24:42 GMT Received: from hu-devc-lv-u18-c.qualcomm.com (hu-eserrao-lv.qualcomm.com [10.47.235.27]) by NALASPPMTA01.qualcomm.com (PPS) with ESMTP id 46UMOg38024864; Tue, 30 Jul 2024 22:24:42 +0000 Received: by hu-devc-lv-u18-c.qualcomm.com (Postfix, from userid 464172) id BB34250019E; Tue, 30 Jul 2024 15:24:41 -0700 (PDT) From: Elson Roy Serrao To: andersson@kernel.org, konrad.dybcio@linaro.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, gregkh@linuxfoundation.org Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Elson Roy Serrao Subject: [PATCH 7/8] usb: misc: eud: Handle usb role switch notifications Date: Tue, 30 Jul 2024 15:24:38 -0700 Message-Id: <20240730222439.3469-8-quic_eserrao@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240730222439.3469-1-quic_eserrao@quicinc.com> References: <20240730222439.3469-1-quic_eserrao@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: inWyBpmZbT2Ihr2501lAwyLuAjCm_CUm X-Proofpoint-ORIG-GUID: inWyBpmZbT2Ihr2501lAwyLuAjCm_CUm X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-07-30_18,2024-07-30_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 mlxlogscore=922 adultscore=0 priorityscore=1501 spamscore=0 bulkscore=0 mlxscore=0 lowpriorityscore=0 clxscore=1015 malwarescore=0 suspectscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2407300155 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Since EUD is physically present between the USB connector and the USB controller, it should relay the usb role notifications from the connector. Hence register a role switch handler to process and relay these roles to the USB controller. This results in a common framework to send both connector related events and eud attach/detach events to the USB controller. Signed-off-by: Elson Roy Serrao --- drivers/usb/misc/qcom_eud.c | 91 ++++++++++++++++++++++++++++--------- 1 file changed, 69 insertions(+), 22 deletions(-) diff --git a/drivers/usb/misc/qcom_eud.c b/drivers/usb/misc/qcom_eud.c index 3de7d465912c..9a49c934e8cf 100644 --- a/drivers/usb/misc/qcom_eud.c +++ b/drivers/usb/misc/qcom_eud.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -35,12 +36,16 @@ struct eud_chip { struct device *dev; struct usb_role_switch *role_sw; struct phy *usb2_phy; + + /* mode lock */ + struct mutex mutex; void __iomem *base; void __iomem *mode_mgr; unsigned int int_status; int irq; bool enabled; bool usb_attached; + enum usb_role current_role; }; static int eud_phy_enable(struct eud_chip *chip) @@ -64,6 +69,38 @@ static void eud_phy_disable(struct eud_chip *chip) phy_exit(chip->usb2_phy); } +static int eud_usb_role_set(struct eud_chip *chip, enum usb_role role) +{ + struct usb_role_switch *sw; + int ret = 0; + + mutex_lock(&chip->mutex); + + /* Avoid duplicate role handling */ + if (role == chip->current_role) + goto err; + + sw = usb_role_switch_get(chip->dev); + if (IS_ERR_OR_NULL(sw)) { + dev_err(chip->dev, "failed to get usb switch\n"); + ret = -EINVAL; + goto err; + } + + ret = usb_role_switch_set_role(sw, role); + usb_role_switch_put(sw); + + if (ret) { + dev_err(chip->dev, "failed to set role\n"); + goto err; + } + chip->current_role = role; +err: + mutex_unlock(&chip->mutex); + + return ret; +} + static int enable_eud(struct eud_chip *priv) { int ret; @@ -77,7 +114,7 @@ static int enable_eud(struct eud_chip *priv) priv->base + EUD_REG_INT1_EN_MASK); writel(1, priv->mode_mgr + EUD_REG_EUD_EN2); - return usb_role_switch_set_role(priv->role_sw, USB_ROLE_DEVICE); + return ret; } static void disable_eud(struct eud_chip *priv) @@ -106,15 +143,20 @@ static ssize_t enable_store(struct device *dev, if (kstrtobool(buf, &enable)) return -EINVAL; + /* EUD enable is applicable only in DEVICE mode */ + if (enable && chip->current_role != USB_ROLE_DEVICE) + return -EINVAL; + if (enable) { ret = enable_eud(chip); - if (!ret) - chip->enabled = enable; - else - disable_eud(chip); + if (ret) { + dev_err(chip->dev, "failed to enable eud\n"); + return count; + } } else { disable_eud(chip); } + chip->enabled = enable; return count; } @@ -185,11 +227,9 @@ static irqreturn_t handle_eud_irq_thread(int irq, void *data) int ret; if (chip->usb_attached) - ret = usb_role_switch_set_role(chip->role_sw, USB_ROLE_DEVICE); + ret = eud_usb_role_set(chip, USB_ROLE_DEVICE); else - ret = usb_role_switch_set_role(chip->role_sw, USB_ROLE_HOST); - if (ret) - dev_err(chip->dev, "failed to set role switch\n"); + ret = eud_usb_role_set(chip, USB_ROLE_HOST); /* set and clear vbus_int_clr[0] to clear interrupt */ writel(BIT(0), chip->base + EUD_REG_VBUS_INT_CLR); @@ -198,16 +238,18 @@ static irqreturn_t handle_eud_irq_thread(int irq, void *data) return IRQ_HANDLED; } -static void eud_role_switch_release(void *data) +static int eud_usb_role_switch_set(struct usb_role_switch *sw, + enum usb_role role) { - struct eud_chip *chip = data; + struct eud_chip *chip = usb_role_switch_get_drvdata(sw); - usb_role_switch_put(chip->role_sw); + return eud_usb_role_set(chip, role); } static int eud_probe(struct platform_device *pdev) { struct eud_chip *chip; + struct usb_role_switch_desc eud_role_switch = {NULL}; int ret; chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); @@ -221,16 +263,6 @@ static int eud_probe(struct platform_device *pdev) return dev_err_probe(chip->dev, PTR_ERR(chip->usb2_phy), "no usb2 phy configured\n"); - chip->role_sw = usb_role_switch_get(&pdev->dev); - if (IS_ERR(chip->role_sw)) - return dev_err_probe(chip->dev, PTR_ERR(chip->role_sw), - "failed to get role switch\n"); - - ret = devm_add_action_or_reset(chip->dev, eud_role_switch_release, chip); - if (ret) - return dev_err_probe(chip->dev, ret, - "failed to add role switch release action\n"); - chip->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(chip->base)) return PTR_ERR(chip->base); @@ -248,6 +280,18 @@ static int eud_probe(struct platform_device *pdev) if (ret) return dev_err_probe(chip->dev, ret, "failed to allocate irq\n"); + eud_role_switch.fwnode = dev_fwnode(chip->dev); + eud_role_switch.set = eud_usb_role_switch_set; + eud_role_switch.get = NULL; + eud_role_switch.driver_data = chip; + chip->role_sw = usb_role_switch_register(chip->dev, &eud_role_switch); + + if (IS_ERR(chip->role_sw)) + return dev_err_probe(chip->dev, PTR_ERR(chip->role_sw), + "failed to register role switch\n"); + + mutex_init(&chip->mutex); + enable_irq_wake(chip->irq); platform_set_drvdata(pdev, chip); @@ -262,6 +306,9 @@ static void eud_remove(struct platform_device *pdev) if (chip->enabled) disable_eud(chip); + if (chip->role_sw) + usb_role_switch_unregister(chip->role_sw); + device_init_wakeup(&pdev->dev, false); disable_irq_wake(chip->irq); } From patchwork Tue Jul 30 22:24:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elson Roy Serrao X-Patchwork-Id: 815392 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0F389190473; 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Signed-off-by: Elson Roy Serrao --- drivers/usb/misc/qcom_eud.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/misc/qcom_eud.c b/drivers/usb/misc/qcom_eud.c index 9a49c934e8cf..465d57c05c3c 100644 --- a/drivers/usb/misc/qcom_eud.c +++ b/drivers/usb/misc/qcom_eud.c @@ -315,6 +315,7 @@ static void eud_remove(struct platform_device *pdev) static const struct of_device_id eud_dt_match[] = { { .compatible = "qcom,sc7280-eud" }, + { .compatible = "qcom,sm8450-eud" }, { } }; MODULE_DEVICE_TABLE(of, eud_dt_match);