From patchwork Wed Nov 21 14:06:33 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Grzeschik X-Patchwork-Id: 1781031 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 56F6C3FCA5 for ; Wed, 21 Nov 2012 14:11:08 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TbAyz-0001DX-Cf; Wed, 21 Nov 2012 14:08:53 +0000 Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TbAxk-0000m3-Ni for linux-arm-kernel@lists.infradead.org; Wed, 21 Nov 2012 14:07:38 +0000 Received: from dude.hi.pengutronix.de ([2001:6f8:1178:2:21e:67ff:fe11:9c5c]) by metis.ext.pengutronix.de with esmtp (Exim 4.72) (envelope-from ) id 1TbAx0-0006KZ-3z; Wed, 21 Nov 2012 15:06:50 +0100 Received: from mgr by dude.hi.pengutronix.de with local (Exim 4.80) (envelope-from ) id 1TbAwx-0003Rl-DZ; Wed, 21 Nov 2012 15:06:47 +0100 From: Michael Grzeschik To: linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 7/7] usb: chipidea: usbmisc: add post handling and errata fix for mx25 Date: Wed, 21 Nov 2012 15:06:33 +0100 Message-Id: <1353506793-8354-8-git-send-email-m.grzeschik@pengutronix.de> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1353506793-8354-1-git-send-email-m.grzeschik@pengutronix.de> References: <1353506793-8354-1-git-send-email-m.grzeschik@pengutronix.de> X-SA-Exim-Connect-IP: 2001:6f8:1178:2:21e:67ff:fe11:9c5c X-SA-Exim-Mail-From: mgr@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20121121_090737_147929_33970024 X-CRM114-Status: GOOD ( 22.52 ) X-Spam-Score: -2.6 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: fabio.estevam@freescale.com, alexander.shishkin@linux.intel.com, gregkh@linuxfoundation.org, devicetree-discuss@lists.ozlabs.org, mkl@pengutronix.de, kernel@pengutronix.de X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org This adds a post handling routine which is called after ci13xxx_add_device was called. The first user is the mx25, which has to disable the external-vbus-divider after the ude has started. Signed-off-by: Michael Grzeschik Signed-off-by: Marc Kleine-Budde --- Changes since v2: * added defines for register offsets and bitmasks .../devicetree/bindings/usb/ci13xxx-imx.txt | 2 ++ drivers/usb/chipidea/ci13xxx_imx.c | 12 +++++++ drivers/usb/chipidea/ci13xxx_imx.h | 3 ++ drivers/usb/chipidea/usbmisc_imx.c | 33 ++++++++++++++++++++ 4 files changed, 50 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt b/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt index 5778b9c..1c04a4c 100644 --- a/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt +++ b/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt @@ -11,6 +11,7 @@ Optional properties: that indicate usb controller index - vbus-supply: regulator for vbus - disable-over-current: disable over current detect +- external-vbus-divider: enables off-chip resistor divider for Vbus Examples: usb@02184000 { /* USB OTG */ @@ -20,4 +21,5 @@ usb@02184000 { /* USB OTG */ fsl,usbphy = <&usbphy1>; fsl,usbmisc = <&usbmisc 0>; disable-over-current; + external-vbus-divider; }; diff --git a/drivers/usb/chipidea/ci13xxx_imx.c b/drivers/usb/chipidea/ci13xxx_imx.c index 935de97..d346c99 100644 --- a/drivers/usb/chipidea/ci13xxx_imx.c +++ b/drivers/usb/chipidea/ci13xxx_imx.c @@ -79,6 +79,9 @@ int usbmisc_get_init_data(struct device *dev, struct usbmisc_usb_device *usbdev) if (of_find_property(np, "disable-over-current", NULL)) usbdev->disable_oc = 1; + if (of_find_property(np, "external-vbus-divider", NULL)) + usbdev->evdo = 1; + return 0; } EXPORT_SYMBOL_GPL(usbmisc_get_init_data); @@ -213,6 +216,15 @@ static int __devinit ci13xxx_imx_probe(struct platform_device *pdev) goto put_np; } + if (usbmisc_ops && usbmisc_ops->post) { + ret = usbmisc_ops->post(&pdev->dev); + if (ret) { + dev_err(&pdev->dev, + "usbmisc post failed, ret=%d\n", ret); + goto put_np; + } + } + data->ci_pdev = plat_ci; platform_set_drvdata(pdev, data); diff --git a/drivers/usb/chipidea/ci13xxx_imx.h b/drivers/usb/chipidea/ci13xxx_imx.h index 2e88acc..d065273 100644 --- a/drivers/usb/chipidea/ci13xxx_imx.h +++ b/drivers/usb/chipidea/ci13xxx_imx.h @@ -13,6 +13,8 @@ struct usbmisc_ops { /* It's called once when probe a usb device */ int (*init)(struct device *dev); + /* It's called once after adding a usb device */ + int (*post)(struct device *dev); }; struct usbmisc_usb_device { @@ -20,6 +22,7 @@ struct usbmisc_usb_device { int index; int disable_oc:1; /* over current detect disabled */ + int evdo:1; /* set external vbus divider option */ }; int usbmisc_set_ops(const struct usbmisc_ops *ops); diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c index b1811df..8c947c1 100644 --- a/drivers/usb/chipidea/usbmisc_imx.c +++ b/drivers/usb/chipidea/usbmisc_imx.c @@ -14,11 +14,15 @@ #include #include #include +#include #include "ci13xxx_imx.h" #define USB_DEV_MAX 4 +#define MX25_USB_PHY_CTRL_OFFSET 0x08; +#define MX25_BM_EXTERNAL_VBUS_DIVIDER BIT(23) + #define MX53_USB_OTG_PHY_CTRL_0_OFFSET 0x08; #define MX53_USB_UH2_CTRL_OFFSET 0x14; #define MX53_USB_UH3_CTRL_OFFSET 0x18; @@ -61,6 +65,30 @@ static struct usbmisc_usb_device *get_usbdev(struct device *dev) return &usbmisc->usbdev[i]; } +static int usbmisc_imx25_post(struct device *dev) +{ + struct usbmisc_usb_device *usbdev; + void __iomem *reg; + unsigned long flags; + u32 val; + + usbdev = get_usbdev(dev); + if (IS_ERR(usbdev)) + return PTR_ERR(usbdev); + + reg = usbmisc->base + MX25_USB_PHY_CTRL_OFFSET; + + if (usbdev->evdo) { + spin_lock_irqsave(&usbmisc->lock, flags); + val = readl(reg); + writel(val | MX25_BM_EXTERNAL_VBUS_DIVIDER, reg); + spin_unlock_irqrestore(&usbmisc->lock, flags); + mdelay(5); /* needed to stabilize voltage */ + } + + return 0; +} + static int usbmisc_imx53_init(struct device *dev) { struct usbmisc_usb_device *usbdev; @@ -122,6 +150,10 @@ static int usbmisc_imx6q_init(struct device *dev) return 0; } +static const struct usbmisc_ops imx25_usbmisc_ops = { + .post = usbmisc_imx25_post, +}; + static const struct usbmisc_ops imx53_usbmisc_ops = { .init = usbmisc_imx53_init, }; @@ -131,6 +163,7 @@ static const struct usbmisc_ops imx6q_usbmisc_ops = { }; static const struct of_device_id usbmisc_imx_dt_ids[] = { + { .compatible = "fsl,imx25-usbmisc", .data = (void *)&imx25_usbmisc_ops }, { .compatible = "fsl,imx53-usbmisc", .data = (void *)&imx53_usbmisc_ops }, { .compatible = "fsl,imx6q-usbmisc", .data = (void *)&imx6q_usbmisc_ops }, { /* sentinel */ }