From patchwork Fri Jun 18 09:29:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 12330747 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 239C4C49EA3 for ; Fri, 18 Jun 2021 09:30:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 055CA613ED for ; Fri, 18 Jun 2021 09:30:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233798AbhFRJcy (ORCPT ); Fri, 18 Jun 2021 05:32:54 -0400 Received: from mailgw02.mediatek.com ([1.203.163.81]:57542 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S233472AbhFRJcX (ORCPT ); Fri, 18 Jun 2021 05:32:23 -0400 X-UUID: 3e726c11f3ca4147ad36a8bbee9e69af-20210618 X-UUID: 3e726c11f3ca4147ad36a8bbee9e69af-20210618 Received: from mtkcas34.mediatek.inc [(172.27.4.253)] by mailgw02.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 619443617; Fri, 18 Jun 2021 17:30:11 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by MTKMBS31N1.mediatek.inc (172.27.4.69) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 18 Jun 2021 17:29:58 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 18 Jun 2021 17:29:56 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman , Rob Herring , Felipe Balbi CC: Chunfeng Yun , Matthias Brugger , Thinh Nguyen , , , , , Subject: [PATCH v2 13/13] usb: mtu3: support suspend/resume for dual-role mode Date: Fri, 18 Jun 2021 17:29:18 +0800 Message-ID: <1624008558-16949-14-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1624008558-16949-1-git-send-email-chunfeng.yun@mediatek.com> References: <1624008558-16949-1-git-send-email-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: D6DFC2FC4B8D1D0542543F30B45D8F370DFB9715F39C62A9742B32CD9BD2B5F82000:8 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Support suspend/resume for dual-role mode including the single port and multi-ports supported by host controller, when the host supports mult-ports, only port0 (u2/u3) is used to support dual role mode. Signed-off-by: Chunfeng Yun --- v2: no changes --- drivers/usb/mtu3/mtu3_core.c | 32 +++++++------- drivers/usb/mtu3/mtu3_dr.c | 2 + drivers/usb/mtu3/mtu3_dr.h | 8 ++++ drivers/usb/mtu3/mtu3_host.c | 10 +---- drivers/usb/mtu3/mtu3_plat.c | 84 ++++++++++++++++++++++++++---------- 5 files changed, 89 insertions(+), 47 deletions(-) diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c index a800920d38b9..f90e5cdec614 100644 --- a/drivers/usb/mtu3/mtu3_core.c +++ b/drivers/usb/mtu3/mtu3_core.c @@ -9,7 +9,6 @@ */ #include -#include #include #include #include @@ -1008,12 +1007,25 @@ void ssusb_gadget_exit(struct ssusb_mtk *ssusb) mtu3_hw_exit(mtu); } +bool ssusb_gadget_ip_sleep_check(struct ssusb_mtk *ssusb) +{ + struct mtu3 *mtu = ssusb->u3d; + + /* host only, should wait for ip sleep */ + if (!mtu) + return true; + + /* device is started and pullup D+, ip can sleep */ + if (mtu->is_active && mtu->softconnect) + return true; + + /* ip can't sleep if not pullup D+ when support device mode */ + return false; +} + int ssusb_gadget_suspend(struct ssusb_mtk *ssusb, pm_message_t msg) { struct mtu3 *mtu = ssusb->u3d; - void __iomem *ibase = mtu->ippc_base; - u32 value; - int ret = 0; if (!mtu->gadget_driver) return 0; @@ -1024,17 +1036,7 @@ int ssusb_gadget_suspend(struct ssusb_mtk *ssusb, pm_message_t msg) mtu3_dev_suspend(mtu); synchronize_irq(mtu->irq); - /* wait for ip to sleep */ - if (mtu->is_active && mtu->softconnect) { - ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS1, - value, (value & SSUSB_IP_SLEEP_STS), 100, 100000); - if (ret) { - dev_err(mtu->dev, "ip sleep failed!!!\n"); - ret = -EBUSY; - } - } - - return ret; + return 0; } int ssusb_gadget_resume(struct ssusb_mtk *ssusb, pm_message_t msg) diff --git a/drivers/usb/mtu3/mtu3_dr.c b/drivers/usb/mtu3/mtu3_dr.c index 30e7e5fc0f88..a6b04831b20b 100644 --- a/drivers/usb/mtu3/mtu3_dr.c +++ b/drivers/usb/mtu3/mtu3_dr.c @@ -149,6 +149,7 @@ static void ssusb_mode_sw_work(struct work_struct *work) dev_dbg(ssusb->dev, "set role : %s\n", usb_role_string(desired_role)); mtu3_dbg_trace(ssusb->dev, "set role : %s", usb_role_string(desired_role)); + pm_runtime_get_sync(ssusb->dev); switch (desired_role) { case USB_ROLE_HOST: @@ -169,6 +170,7 @@ static void ssusb_mode_sw_work(struct work_struct *work) default: dev_err(ssusb->dev, "invalid role\n"); } + pm_runtime_put(ssusb->dev); } static void ssusb_set_mode(struct otg_switch_mtk *otg_sx, enum usb_role role) diff --git a/drivers/usb/mtu3/mtu3_dr.h b/drivers/usb/mtu3/mtu3_dr.h index 5286f9f5ee18..e325508bddf4 100644 --- a/drivers/usb/mtu3/mtu3_dr.h +++ b/drivers/usb/mtu3/mtu3_dr.h @@ -59,6 +59,8 @@ int ssusb_gadget_init(struct ssusb_mtk *ssusb); void ssusb_gadget_exit(struct ssusb_mtk *ssusb); int ssusb_gadget_suspend(struct ssusb_mtk *ssusb, pm_message_t msg); int ssusb_gadget_resume(struct ssusb_mtk *ssusb, pm_message_t msg); +bool ssusb_gadget_ip_sleep_check(struct ssusb_mtk *ssusb); + #else static inline int ssusb_gadget_init(struct ssusb_mtk *ssusb) { @@ -79,6 +81,12 @@ ssusb_gadget_resume(struct ssusb_mtk *ssusb, pm_message_t msg) { return 0; } + +static inline bool ssusb_gadget_ip_sleep_check(struct ssusb_mtk *ssusb) +{ + return true; +} + #endif diff --git a/drivers/usb/mtu3/mtu3_host.c b/drivers/usb/mtu3/mtu3_host.c index a0a6a181b752..7d528f3c2482 100644 --- a/drivers/usb/mtu3/mtu3_host.c +++ b/drivers/usb/mtu3/mtu3_host.c @@ -8,7 +8,6 @@ */ #include -#include #include #include #include @@ -254,7 +253,6 @@ int ssusb_host_suspend(struct ssusb_mtk *ssusb) int num_u3p = ssusb->u3_ports; int num_u2p = ssusb->u2_ports; u32 value; - int ret; int i; /* power down u3 ports except skipped ones */ @@ -280,13 +278,7 @@ int ssusb_host_suspend(struct ssusb_mtk *ssusb) /* power down host ip */ mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL1, SSUSB_IP_HOST_PDN); - /* wait for host ip to sleep */ - ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS1, value, - (value & SSUSB_IP_SLEEP_STS), 100, 100000); - if (ret) - dev_err(ssusb->dev, "ip sleep failed!!!\n"); - - return ret; + return 0; } static void ssusb_host_setup(struct ssusb_mtk *ssusb) diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c index 2bb6f58cbcc4..537c6552831e 100644 --- a/drivers/usb/mtu3/mtu3_plat.c +++ b/drivers/usb/mtu3/mtu3_plat.c @@ -45,6 +45,29 @@ int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks) return 0; } +static int wait_for_ip_sleep(struct ssusb_mtk *ssusb) +{ + bool sleep_check = true; + u32 value; + int ret; + + if (!ssusb->is_host) + sleep_check = ssusb_gadget_ip_sleep_check(ssusb); + + if (!sleep_check) + return 0; + + /* wait for ip enter sleep mode */ + ret = readl_poll_timeout(ssusb->ippc_base + U3D_SSUSB_IP_PW_STS1, value, + (value & SSUSB_IP_SLEEP_STS), 100, 100000); + if (ret) { + dev_err(ssusb->dev, "ip sleep failed!!!\n"); + ret = -EBUSY; + } + + return ret; +} + static int ssusb_phy_init(struct ssusb_mtk *ssusb) { int i; @@ -421,6 +444,28 @@ static int mtu3_remove(struct platform_device *pdev) return 0; } +static int resume_ip_and_ports(struct ssusb_mtk *ssusb, pm_message_t msg) +{ + switch (ssusb->dr_mode) { + case USB_DR_MODE_PERIPHERAL: + ssusb_gadget_resume(ssusb, msg); + break; + case USB_DR_MODE_HOST: + ssusb_host_resume(ssusb, false); + break; + case USB_DR_MODE_OTG: + ssusb_host_resume(ssusb, !ssusb->is_host); + if (!ssusb->is_host) + ssusb_gadget_resume(ssusb, msg); + + break; + default: + return -EINVAL; + } + + return 0; +} + static int mtu3_suspend_common(struct device *dev, pm_message_t msg) { struct ssusb_mtk *ssusb = dev_get_drvdata(dev); @@ -432,26 +477,36 @@ static int mtu3_suspend_common(struct device *dev, pm_message_t msg) case USB_DR_MODE_PERIPHERAL: ret = ssusb_gadget_suspend(ssusb, msg); if (ret) - return ret; + goto err; break; case USB_DR_MODE_HOST: ssusb_host_suspend(ssusb); break; case USB_DR_MODE_OTG: - if (!ssusb->is_host) - return 0; - + if (!ssusb->is_host) { + ret = ssusb_gadget_suspend(ssusb, msg); + if (ret) + goto err; + } ssusb_host_suspend(ssusb); break; default: return -EINVAL; } + + ret = wait_for_ip_sleep(ssusb); + if (ret) + goto sleep_err; + ssusb_phy_power_off(ssusb); clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks); ssusb_wakeup_set(ssusb, true); - return 0; +sleep_err: + resume_ip_and_ports(ssusb, msg); +err: + return ret; } static int mtu3_resume_common(struct device *dev, pm_message_t msg) @@ -470,24 +525,7 @@ static int mtu3_resume_common(struct device *dev, pm_message_t msg) if (ret) goto phy_err; - switch (ssusb->dr_mode) { - case USB_DR_MODE_PERIPHERAL: - ssusb_gadget_resume(ssusb, msg); - break; - case USB_DR_MODE_HOST: - ssusb_host_resume(ssusb, false); - break; - case USB_DR_MODE_OTG: - if (!ssusb->is_host) - return 0; - - ssusb_host_resume(ssusb, true); - break; - default: - return -EINVAL; - } - - return 0; + return resume_ip_and_ports(ssusb, msg); phy_err: clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);