From patchwork Fri Jul 7 11:03:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Chaitanya Chundru X-Patchwork-Id: 13304740 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3C2A1EB64D9 for ; Fri, 7 Jul 2023 11:04:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229914AbjGGLEU (ORCPT ); Fri, 7 Jul 2023 07:04:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59420 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229460AbjGGLEQ (ORCPT ); Fri, 7 Jul 2023 07:04:16 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B9EAFF; Fri, 7 Jul 2023 04:04:15 -0700 (PDT) Received: from pps.filterd (m0279872.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3679Km2i006277; Fri, 7 Jul 2023 11:04:06 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=qcppdkim1; bh=ek5WLwSvjXSVCr9SmWwANF2/cFWSzE8fMO2GvxyqURo=; b=NGxxKT9OD8DhF7AoY5U+L4Kx4jbTB87mD7kCugiOCpr+BGdi7qN/GabPc79HVadM2Clh NcDQ1JmxL1url08mlHhRJnJDAreAN+8jzUcnRNLQSEA31iJ0Af8Qjf7CcD9IKTdqgYtX BmcvdZLyfUWqLqdUnsGMG18le0neRDuu7WEUmuxNXP3ycY/jYohwpEQ1BN7+ENajy5G4 j5nDkJXUZjBnmTWM+8uS4nAMvdp2QGei71+KI67PQLNwLMMd8dxIKTlzE96b4sr6IcGm M8CAw8D5n6E4VBTjhjs7kC7vs/itQvRIw9Jm94vp/FpK7gA32u412VcNkJ3+sW/RoHwG KQ== Received: from apblrppmta02.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3rpfyw8cm0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 07 Jul 2023 11:04:06 +0000 Received: from pps.filterd (APBLRPPMTA02.qualcomm.com [127.0.0.1]) by APBLRPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 367B40bk022751; Fri, 7 Jul 2023 11:04:03 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTPS id 3rjd7kq59b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 07 Jul 2023 11:04:03 +0000 Received: from APBLRPPMTA02.qualcomm.com (APBLRPPMTA02.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 367B4203022792; Fri, 7 Jul 2023 11:04:02 GMT Received: from hu-sgudaval-hyd.qualcomm.com (hu-krichai-hyd.qualcomm.com [10.213.110.112]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTP id 367B42HV022786; Fri, 07 Jul 2023 11:04:02 +0000 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 4058933) id 39FCE473F; Fri, 7 Jul 2023 16:34:02 +0530 (+0530) From: Krishna chaitanya chundru To: manivannan.sadhasivam@linaro.org Cc: helgaas@kernel.org, linux-pci@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, quic_vbadigan@quicinc.com, quic_nitegupt@quicinc.com, quic_skananth@quicinc.com, quic_ramkri@quicinc.com, krzysztof.kozlowski@linaro.org, Krishna chaitanya chundru , Manivannan Sadhasivam , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Rob Herring , Bjorn Helgaas Subject: [PATCH v3 7/9] PCI: qcom-ep: Add wake up host op to dw_pcie_ep_ops Date: Fri, 7 Jul 2023 16:33:54 +0530 Message-Id: <1688727836-11141-8-git-send-email-quic_krichai@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1688727836-11141-1-git-send-email-quic_krichai@quicinc.com> References: <1688727836-11141-1-git-send-email-quic_krichai@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: xnFJSSuiJjVawiArsz3v82GIRTFT8plF X-Proofpoint-ORIG-GUID: xnFJSSuiJjVawiArsz3v82GIRTFT8plF X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-07_07,2023-07-06_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 lowpriorityscore=0 priorityscore=1501 phishscore=0 adultscore=0 malwarescore=0 bulkscore=0 mlxscore=0 clxscore=1015 mlxlogscore=999 impostorscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307070102 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add wakeup host op to dw_pcie_ep_ops to wake up host. If the wakeup type is PME, then trigger inband PME by writing to the PARF PARF_PM_CTRL register, otherwise toggle #WAKE. Signed-off-by: Krishna chaitanya chundru --- drivers/pci/controller/dwc/pcie-qcom-ep.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 75ab6d6..6472554 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -89,6 +89,7 @@ /* PARF_PM_CTRL register fields */ #define PARF_PM_CTRL_REQ_EXIT_L1 BIT(1) #define PARF_PM_CTRL_READY_ENTR_L23 BIT(2) +#define PARF_PM_CTRL_XMT_PME BIT(4) #define PARF_PM_CTRL_REQ_NOT_ENTR_L1 BIT(5) /* PARF_MHI_CLOCK_RESET_CTRL fields */ @@ -729,10 +730,37 @@ static void qcom_pcie_ep_init(struct dw_pcie_ep *ep) dw_pcie_ep_reset_bar(pci, bar); } +static bool qcom_pcie_ep_wakeup_host(struct dw_pcie_ep *ep, u8 func_no, + enum pci_epc_wakeup_host_type type) +{ + struct dw_pcie *pci = to_dw_pcie_from_ep(ep); + struct qcom_pcie_ep *pcie_ep = to_pcie_ep(pci); + struct device *dev = pci->dev; + u32 val; + + if (type == PCI_WAKEUP_TOGGLE_WAKE) { + dev_dbg(dev, "Waking up the host by toggling WAKE#\n"); + gpiod_set_value_cansleep(pcie_ep->wake, 1); + usleep_range(WAKE_DELAY_US, WAKE_DELAY_US + 500); + gpiod_set_value_cansleep(pcie_ep->wake, 0); + + } else if (type == PCI_WAKEUP_SEND_PME) { + dev_dbg(dev, "Waking up the host using PME\n"); + val = readl_relaxed(pcie_ep->parf + PARF_PM_CTRL); + writel_relaxed(val | PARF_PM_CTRL_XMT_PME, pcie_ep->parf + PARF_PM_CTRL); + writel_relaxed(val, pcie_ep->parf + PARF_PM_CTRL); + + } else + return false; + + return true; +} + static const struct dw_pcie_ep_ops pci_ep_ops = { .ep_init = qcom_pcie_ep_init, .raise_irq = qcom_pcie_ep_raise_irq, .get_features = qcom_pcie_epc_get_features, + .wakeup_host = qcom_pcie_ep_wakeup_host, }; static int qcom_pcie_ep_probe(struct platform_device *pdev)