From patchwork Mon Aug 8 19:55:39 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 9269667 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 99DA3607D6 for ; Mon, 8 Aug 2016 19:58:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8A54C27FA7 for ; Mon, 8 Aug 2016 19:58:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7F26B27FBE; Mon, 8 Aug 2016 19:58:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CA64527FA7 for ; Mon, 8 Aug 2016 19:58:04 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bWqen-0006IM-Rf; Mon, 08 Aug 2016 19:56:17 +0000 Received: from mx1.redhat.com ([209.132.183.28]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bWqea-0006GL-B2 for linux-arm-kernel@lists.infradead.org; Mon, 08 Aug 2016 19:56:06 +0000 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E3D6080083; Mon, 8 Aug 2016 19:55:45 +0000 (UTC) Received: from shalem.localdomain.com (vpn1-7-57.ams2.redhat.com [10.36.7.57]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u78JtfcK029173; Mon, 8 Aug 2016 15:55:44 -0400 From: Hans de Goede To: Kishon Vijay Abraham I Subject: [PATCH resend] phy-sun4i-usb: Add support for peripheral-only mode Date: Mon, 8 Aug 2016 21:55:39 +0200 Message-Id: <1470686139-19893-2-git-send-email-hdegoede@redhat.com> In-Reply-To: <1470686139-19893-1-git-send-email-hdegoede@redhat.com> References: <1470686139-19893-1-git-send-email-hdegoede@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Mon, 08 Aug 2016 19:55:45 +0000 (UTC) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160808_125604_630917_01AF0BF5 X-CRM114-Status: GOOD ( 20.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Hans de Goede , linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Use the new of_usb_get_dr_mode_by_phy() function to get the dr_mode from the musb controller node instead of assuming that having an id_det gpio means otg mode, and not having one means host mode. Implement peripheral-only mode by adding a sun4i_usb_phy0_get_id_det helper which looks at the dr_mode, always registering our extcon and always monitoring vbus. If dr_mode is not specified in the dts, do not register phy0 as we then do not know how to treat it. This is actually a good thing as this means we will not be registering phy0 on devices where the otg controller is not enabled in the devicetree. Signed-off-by: Hans de Goede Acked-by: Kishon Vijay Abraham I --- Changes in v2: -Adjust for of_usb_get_dr_mode_by_phy now taking an args0 parameter Changes in v3: -Only toggle the phy vbus-det bit on id-change on systems without vbus-det when in otg mode Changes in v4: -No changes Changes in v5: -Added Kishon's Acked-by Changes in v6: -Rebase on top of latest linux-phy/next --- drivers/phy/phy-sun4i-usb.c | 68 ++++++++++++++++++++++++++++++--------------- 1 file changed, 46 insertions(+), 22 deletions(-) diff --git a/drivers/phy/phy-sun4i-usb.c b/drivers/phy/phy-sun4i-usb.c index 0a45bc6..8c7eb33 100644 --- a/drivers/phy/phy-sun4i-usb.c +++ b/drivers/phy/phy-sun4i-usb.c @@ -40,6 +40,7 @@ #include #include #include +#include #include #define REG_ISCR 0x00 @@ -110,6 +111,7 @@ struct sun4i_usb_phy_cfg { struct sun4i_usb_phy_data { void __iomem *base; const struct sun4i_usb_phy_cfg *cfg; + enum usb_dr_mode dr_mode; struct mutex mutex; struct sun4i_usb_phy { struct phy *phy; @@ -120,6 +122,7 @@ struct sun4i_usb_phy_data { bool regulator_on; int index; } phys[MAX_PHYS]; + int first_phy; /* phy0 / otg related variables */ struct extcon_dev *extcon; bool phy0_init; @@ -285,16 +288,10 @@ static int sun4i_usb_phy_init(struct phy *_phy) sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN); sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN); - if (data->id_det_gpio) { - /* OTG mode, force ISCR and cable state updates */ - data->id_det = -1; - data->vbus_det = -1; - queue_delayed_work(system_wq, &data->detect, 0); - } else { - /* Host only mode */ - sun4i_usb_phy0_set_id_detect(_phy, 0); - sun4i_usb_phy0_set_vbus_detect(_phy, 1); - } + /* Force ISCR and cable state updates */ + data->id_det = -1; + data->vbus_det = -1; + queue_delayed_work(system_wq, &data->detect, 0); } return 0; @@ -319,6 +316,19 @@ static int sun4i_usb_phy_exit(struct phy *_phy) return 0; } +static int sun4i_usb_phy0_get_id_det(struct sun4i_usb_phy_data *data) +{ + switch (data->dr_mode) { + case USB_DR_MODE_OTG: + return gpiod_get_value_cansleep(data->id_det_gpio); + case USB_DR_MODE_HOST: + return 0; + case USB_DR_MODE_PERIPHERAL: + default: + return 1; + } +} + static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data) { if (data->vbus_det_gpio) @@ -432,7 +442,10 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work) struct phy *phy0 = data->phys[0].phy; int id_det, vbus_det, id_notify = 0, vbus_notify = 0; - id_det = gpiod_get_value_cansleep(data->id_det_gpio); + if (phy0 == NULL) + return; + + id_det = sun4i_usb_phy0_get_id_det(data); vbus_det = sun4i_usb_phy0_get_vbus_det(data); mutex_lock(&phy0->mutex); @@ -448,7 +461,8 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work) * without vbus detection report vbus low for long enough for * the musb-ip to end the current device session. */ - if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 0) { + if (data->dr_mode == USB_DR_MODE_OTG && + !sun4i_usb_phy0_have_vbus_det(data) && id_det == 0) { sun4i_usb_phy0_set_vbus_detect(phy0, 0); msleep(200); sun4i_usb_phy0_set_vbus_detect(phy0, 1); @@ -474,7 +488,8 @@ static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work) * without vbus detection report vbus low for long enough to * the musb-ip to end the current host session. */ - if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 1) { + if (data->dr_mode == USB_DR_MODE_OTG && + !sun4i_usb_phy0_have_vbus_det(data) && id_det == 1) { mutex_lock(&phy0->mutex); sun4i_usb_phy0_set_vbus_detect(phy0, 0); msleep(1000); @@ -519,7 +534,8 @@ static struct phy *sun4i_usb_phy_xlate(struct device *dev, { struct sun4i_usb_phy_data *data = dev_get_drvdata(dev); - if (args->args[0] >= data->cfg->num_phys) + if (args->args[0] < data->first_phy || + args->args[0] >= data->cfg->num_phys) return ERR_PTR(-ENODEV); return data->phys[args->args[0]].phy; @@ -593,13 +609,17 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev) return -EPROBE_DEFER; } - /* vbus_det without id_det makes no sense, and is not supported */ - if (sun4i_usb_phy0_have_vbus_det(data) && !data->id_det_gpio) { - dev_err(dev, "usb0_id_det missing or invalid\n"); - return -ENODEV; - } - - if (data->id_det_gpio) { + data->dr_mode = of_usb_get_dr_mode_by_phy(np, 0); + switch (data->dr_mode) { + case USB_DR_MODE_OTG: + /* otg without id_det makes no sense, and is not supported */ + if (!data->id_det_gpio) { + dev_err(dev, "usb0_id_det missing or invalid\n"); + return -ENODEV; + } + /* fall through */ + case USB_DR_MODE_HOST: + case USB_DR_MODE_PERIPHERAL: data->extcon = devm_extcon_dev_allocate(dev, sun4i_usb_phy0_cable); if (IS_ERR(data->extcon)) @@ -610,9 +630,13 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev) dev_err(dev, "failed to register extcon: %d\n", ret); return ret; } + break; + default: + dev_info(dev, "dr_mode unknown, not registering usb phy0\n"); + data->first_phy = 1; } - for (i = 0; i < data->cfg->num_phys; i++) { + for (i = data->first_phy; i < data->cfg->num_phys; i++) { struct sun4i_usb_phy *phy = data->phys + i; char name[16];