From patchwork Wed Feb 27 06:33:17 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Chen X-Patchwork-Id: 2192501 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id 76B623FD4E for ; Wed, 27 Feb 2013 06:39:08 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UAacQ-0004b8-TC; Wed, 27 Feb 2013 06:35:58 +0000 Received: from am1ehsobe004.messaging.microsoft.com ([213.199.154.207] helo=am1outboundpool.messaging.microsoft.com) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UAaaf-0003tl-39 for linux-arm-kernel@lists.infradead.org; Wed, 27 Feb 2013 06:34:10 +0000 Received: from mail36-am1-R.bigfish.com (10.3.201.230) by AM1EHSOBE010.bigfish.com (10.3.204.30) with Microsoft SMTP Server id 14.1.225.23; Wed, 27 Feb 2013 06:34:07 +0000 Received: from mail36-am1 (localhost [127.0.0.1]) by mail36-am1-R.bigfish.com (Postfix) with ESMTP id 27D2234011A; Wed, 27 Feb 2013 06:34:07 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 0 X-BigFish: VS0(zzzz1f42h1ee6h1de0h1202h1e76h1d1ah1d2ahzz8275bhz2dh2a8h668h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h1354h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1155h) Received: from mail36-am1 (localhost.localdomain [127.0.0.1]) by mail36-am1 (MessageSwitch) id 1361946844122235_19503; Wed, 27 Feb 2013 06:34:04 +0000 (UTC) Received: from AM1EHSMHS016.bigfish.com (unknown [10.3.201.237]) by mail36-am1.bigfish.com (Postfix) with ESMTP id 19E8230005C; Wed, 27 Feb 2013 06:34:04 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by AM1EHSMHS016.bigfish.com (10.3.207.154) with Microsoft SMTP Server (TLS) id 14.1.225.23; Wed, 27 Feb 2013 06:34:04 +0000 Received: from az84smr01.freescale.net (10.64.34.197) by 039-SN1MMR1-003.039d.mgd.msft.net (10.84.1.16) with Microsoft SMTP Server (TLS) id 14.2.328.11; Wed, 27 Feb 2013 06:33:50 +0000 Received: from localhost.localdomain (nchen-desktop.ap.freescale.net [10.192.242.40]) by az84smr01.freescale.net (8.14.3/8.14.0) with ESMTP id r1R6XKbT032761; Tue, 26 Feb 2013 23:33:56 -0700 From: Peter Chen To: , Subject: [PATCH v10 6/8] usb: chipidea: imx: add internal vbus regulator control Date: Wed, 27 Feb 2013 14:33:17 +0800 Message-ID: <1361946799-29471-7-git-send-email-peter.chen@freescale.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1361946799-29471-1-git-send-email-peter.chen@freescale.com> References: <1361946799-29471-1-git-send-email-peter.chen@freescale.com> MIME-Version: 1.0 X-OriginatorOrg: freescale.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130227_013409_392751_3642A50E X-CRM114-Status: GOOD ( 16.99 ) X-Spam-Score: 0.4 (/) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (0.4 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [213.199.154.207 listed in list.dnswl.org] 3.0 KHOP_BIG_TO_CC Sent to 10+ recipients instaed of Bcc or a list -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: marex@denx.de, m.grzeschik@pengutronix.de, gregkh@linuxfoundation.org, pkondeti@codeaurora.org, linux-usb@vger.kernel.org, mkl@pengutronix.de, kernel@pengutronix.de, matt@genesi-usa.com, shawn.guo@linaro.org, festevam@gmail.com, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org - For host, the vbus should always be on. - For otg, the vbus is off defaultly, the vbus needs to be turned on/off when usb role switches. Signed-off-by: Peter Chen --- drivers/usb/chipidea/ci.h | 2 + drivers/usb/chipidea/ci13xxx_imx.c | 76 ++++++++++++++++++++++++++++-------- 2 files changed, 61 insertions(+), 17 deletions(-) diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h index 0bd17a5..5663092 100644 --- a/drivers/usb/chipidea/ci.h +++ b/drivers/usb/chipidea/ci.h @@ -133,6 +133,7 @@ struct hw_bank { * @id_event: indicates there is a id event, and handled at ci_otg_work * @b_sess_valid_event: indicates there is a vbus event, and handled * at ci_otg_work + * @reg_vbus: used to control internal vbus regulator */ struct ci13xxx { struct device *dev; @@ -172,6 +173,7 @@ struct ci13xxx { struct usb_otg otg; bool id_event; bool b_sess_valid_event; + struct regulator *reg_vbus; }; static inline struct ci_role_driver *ci_role(struct ci13xxx *ci) diff --git a/drivers/usb/chipidea/ci13xxx_imx.c b/drivers/usb/chipidea/ci13xxx_imx.c index 3ed119e..5499cf8 100644 --- a/drivers/usb/chipidea/ci13xxx_imx.c +++ b/drivers/usb/chipidea/ci13xxx_imx.c @@ -85,11 +85,43 @@ EXPORT_SYMBOL_GPL(usbmisc_get_init_data); /* End of common functions shared by usbmisc drivers*/ +static int ci13xxx_otg_set_vbus(struct usb_otg *otg, bool enabled) +{ + struct ci13xxx *ci = container_of(otg, struct ci13xxx, otg); + struct regulator *reg_vbus = ci->reg_vbus; + int ret; + + WARN_ON(!reg_vbus); + + if (reg_vbus) { + if (enabled) { + ret = regulator_enable(reg_vbus); + if (ret) { + dev_err(ci->dev, + "Failed to enable vbus regulator, ret=%d\n", + ret); + return ret; + } + } else { + ret = regulator_disable(reg_vbus); + if (ret) { + dev_err(ci->dev, + "Failed to disable vbus regulator, ret=%d\n", + ret); + return ret; + } + } + } + + return 0; +} + static int ci13xxx_imx_probe(struct platform_device *pdev) { struct ci13xxx_imx_data *data; struct ci13xxx_platform_data *pdata; struct platform_device *plat_ci; + struct ci13xxx *ci; struct resource *res; struct regulator *reg_vbus; struct pinctrl *pinctrl; @@ -163,20 +195,11 @@ static int ci13xxx_imx_probe(struct platform_device *pdev) data->phy = phy; } - /* we only support host now, so enable vbus here */ reg_vbus = devm_regulator_get(&pdev->dev, "vbus"); - if (!IS_ERR(reg_vbus)) { - ret = regulator_enable(reg_vbus); - if (ret) { - dev_err(&pdev->dev, - "Failed to enable vbus regulator, err=%d\n", - ret); - goto err_clk; - } + if (!IS_ERR(reg_vbus)) data->reg_vbus = reg_vbus; - } else { + else reg_vbus = NULL; - } pdata->phy = data->phy; @@ -186,7 +209,7 @@ static int ci13xxx_imx_probe(struct platform_device *pdev) if (!pdev->dev.dma_mask) { ret = -ENOMEM; dev_err(&pdev->dev, "Failed to alloc dma_mask!\n"); - goto err; + goto err_clk; } *pdev->dev.dma_mask = DMA_BIT_MASK(32); dma_set_coherent_mask(&pdev->dev, *pdev->dev.dma_mask); @@ -197,7 +220,7 @@ static int ci13xxx_imx_probe(struct platform_device *pdev) if (ret) { dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret); - goto err; + goto err_clk; } } @@ -209,20 +232,39 @@ static int ci13xxx_imx_probe(struct platform_device *pdev) dev_err(&pdev->dev, "Can't register ci_hdrc platform device, err=%d\n", ret); - goto err; + goto err_clk; } data->ci_pdev = plat_ci; platform_set_drvdata(pdev, data); + ci = platform_get_drvdata(plat_ci); + /* + * Internal vbus on/off policy + * - Always on for host only function + * - Always off for gadget only function + * - call otg.set_vbus to control on/off according usb role + */ + + if (ci->roles[CI_ROLE_HOST] && !ci->roles[CI_ROLE_GADGET] + && reg_vbus) { + ret = regulator_enable(reg_vbus); + if (ret) { + dev_err(&pdev->dev, + "Failed to enable vbus regulator, ret=%d\n", + ret); + goto err_clk; + } + } else if (ci->is_otg) { + ci->otg.set_vbus = ci13xxx_otg_set_vbus; + ci->reg_vbus = data->reg_vbus; + } + pm_runtime_no_callbacks(&pdev->dev); pm_runtime_enable(&pdev->dev); return 0; -err: - if (reg_vbus) - regulator_disable(reg_vbus); err_clk: clk_disable_unprepare(data->clk); return ret;