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Tue, 30 Jul 2024 22:24:42 +0000 Received: from NALASPPMTA03.qualcomm.com (NALASPPMTA03.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 46UMOgMH025850; 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 NALASPPMTA03.qualcomm.com (PPS) with ESMTP id 46UMOgeQ025847; Tue, 30 Jul 2024 22:24:42 +0000 Received: by hu-devc-lv-u18-c.qualcomm.com (Postfix, from userid 464172) id B7BD9500198; 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 6/8] usb: misc: eud: Add High-Speed Phy control for EUD operations Date: Tue, 30 Jul 2024 15:24:37 -0700 Message-Id: <20240730222439.3469-7-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: Z45UKuvCHbIpVLggytp-x-SX_p8_Vahy X-Proofpoint-ORIG-GUID: Z45UKuvCHbIpVLggytp-x-SX_p8_Vahy 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 adultscore=0 phishscore=0 lowpriorityscore=0 mlxlogscore=999 priorityscore=1501 clxscore=1015 spamscore=0 mlxscore=0 bulkscore=0 suspectscore=0 impostorscore=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-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The Embedded USB Debugger(EUD) is a HS-USB on-chip hub to support the debug and trace capabilities on Qualcomm devices. It is physically present in between the usb connector and the usb controller. Being a HS USB hub, it relies on HS Phy for its functionality. Add HS phy support in the eud driver and control the phy during eud enable/disable operations. Signed-off-by: Elson Roy Serrao --- drivers/usb/misc/qcom_eud.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/drivers/usb/misc/qcom_eud.c b/drivers/usb/misc/qcom_eud.c index 26e9b8749d8a..3de7d465912c 100644 --- a/drivers/usb/misc/qcom_eud.c +++ b/drivers/usb/misc/qcom_eud.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include #include @@ -33,6 +34,7 @@ struct eud_chip { struct device *dev; struct usb_role_switch *role_sw; + struct phy *usb2_phy; void __iomem *base; void __iomem *mode_mgr; unsigned int int_status; @@ -41,8 +43,35 @@ struct eud_chip { bool usb_attached; }; +static int eud_phy_enable(struct eud_chip *chip) +{ + int ret; + + ret = phy_init(chip->usb2_phy); + if (ret) + return ret; + + ret = phy_power_on(chip->usb2_phy); + if (ret) + phy_exit(chip->usb2_phy); + + return ret; +} + +static void eud_phy_disable(struct eud_chip *chip) +{ + phy_power_off(chip->usb2_phy); + phy_exit(chip->usb2_phy); +} + static int enable_eud(struct eud_chip *priv) { + int ret; + + ret = eud_phy_enable(priv); + if (ret) + return ret; + writel(EUD_ENABLE, priv->base + EUD_REG_CSR_EUD_EN); writel(EUD_INT_VBUS | EUD_INT_SAFE_MODE, priv->base + EUD_REG_INT1_EN_MASK); @@ -55,6 +84,7 @@ static void disable_eud(struct eud_chip *priv) { writel(0, priv->base + EUD_REG_CSR_EUD_EN); writel(0, priv->mode_mgr + EUD_REG_EUD_EN2); + eud_phy_disable(priv); } static ssize_t enable_show(struct device *dev, @@ -186,6 +216,11 @@ static int eud_probe(struct platform_device *pdev) chip->dev = &pdev->dev; + chip->usb2_phy = devm_phy_get(chip->dev, "usb2-phy"); + if (IS_ERR(chip->usb2_phy)) + 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),