From patchwork Mon Jan 21 10:07:36 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chao Xie X-Patchwork-Id: 2010431 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 5C8E23FD1A for ; Mon, 21 Jan 2013 10:18:28 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TxEQB-0002jS-18; Mon, 21 Jan 2013 10:16:07 +0000 Received: from na3sys009aog112.obsmtp.com ([74.125.149.207]) by merlin.infradead.org with smtps (Exim 4.76 #1 (Red Hat Linux)) id 1TxEId-0004a2-8Z for linux-arm-kernel@lists.infradead.org; Mon, 21 Jan 2013 10:08:22 +0000 Received: from MSI-MTA.marvell.com ([65.219.4.132]) (using TLSv1) by na3sys009aob112.postini.com ([74.125.148.12]) with SMTP ID DSNKUP0TjQeo1GdVaaHv7hjtdse5BuId78sE@postini.com; Mon, 21 Jan 2013 02:08:19 PST Received: from maili.marvell.com ([10.68.76.210]) by MSI-MTA.marvell.com with Microsoft SMTPSVC(6.0.3790.4675); Mon, 21 Jan 2013 02:07:49 -0800 Received: from localhost (unknown [10.38.36.239]) by maili.marvell.com (Postfix) with ESMTP id 213F54E513; Mon, 21 Jan 2013 02:07:49 -0800 (PST) From: Chao Xie To: linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, haojian.zhuang@gmail.com, stern@rowland.harvard.edu, balbi@ti.com, gregkh@linuxfoundation.org Subject: [V4 PATCH 18/26] usb: phy: mv_usb2_phy: add externel chip support Date: Mon, 21 Jan 2013 05:07:36 -0500 Message-Id: <1358762864-9249-19-git-send-email-chao.xie@marvell.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1358762864-9249-1-git-send-email-chao.xie@marvell.com> References: <1358762864-9249-1-git-send-email-chao.xie@marvell.com> X-OriginalArrivalTime: 21 Jan 2013 10:07:49.0290 (UTC) FILETIME=[2AD308A0:01CDF7BF] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130121_050819_647184_165E9041 X-CRM114-Status: GOOD ( 14.69 ) X-Spam-Score: -4.2 (----) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-4.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [74.125.149.207 listed in list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Chao Xie 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 For the vbus and idpin detection. It may be completed by some external chip, for example the pmic chip 88pm860x in driver/mfd can do it. Although the usb controller can detect the vbus and id pin, but it need clock on and PHY enabled to detect the vbus/idpin. It will increase the power. Using the external chip to detect vbus/idpin can save the power. Signed-off-by: Chao Xie --- drivers/usb/phy/mv_usb2_phy.c | 54 +++++++++++++++++++++ include/linux/platform_data/mv_usb.h | 15 ++---- include/linux/usb/mv_usb2.h | 85 ++++++++++++++++++++++++++++++++++ 3 files changed, 144 insertions(+), 10 deletions(-) diff --git a/drivers/usb/phy/mv_usb2_phy.c b/drivers/usb/phy/mv_usb2_phy.c index c2bccae..0bea901 100644 --- a/drivers/usb/phy/mv_usb2_phy.c +++ b/drivers/usb/phy/mv_usb2_phy.c @@ -136,6 +136,53 @@ struct mv_usb2_phy *mv_usb2_get_phy(void) } EXPORT_SYMBOL(mv_usb2_get_phy); +int mv_usb2_register_notifier(struct mv_usb2_phy *phy, + struct notifier_block *nb) +{ + int ret; + + if (!phy) + return -ENODEV; + + ret = atomic_notifier_chain_register(phy->extern_chip.head, nb); + if (ret) + return ret; + + return 0; +} +EXPORT_SYMBOL(mv_usb2_register_notifier); + +int mv_usb2_unregister_notifier(struct mv_usb2_phy *phy, + struct notifier_block *nb) +{ + int ret; + + if (!phy) + return -ENODEV; + + ret = atomic_notifier_chain_unregister(phy->extern_chip.head, nb); + if (ret) + return ret; + + return 0; +} +EXPORT_SYMBOL(mv_usb2_unregister_notifier); + +int mv_usb2_notify(struct mv_usb2_phy *phy, unsigned long val, void *v) +{ + int ret; + + if (!phy) + return -ENODEV; + + ret = atomic_notifier_call_chain(phy->extern_chip.head, val, v); + if (ret) + return ret; + + return 0; +} +EXPORT_SYMBOL(mv_usb2_notify); + static unsigned int u2o_get(void __iomem *base, unsigned int offset) { return readl(base + offset); @@ -414,6 +461,13 @@ static int usb_phy_probe(struct platform_device *pdev) mv_phy->init = usb_phy_init; mv_phy->shutdown = usb_phy_shutdown; + mv_phy->extern_chip.head = devm_kzalloc(&pdev->dev, + sizeof(*mv_phy->extern_chip.head), + GFP_KERNEL); + if (mv_phy->extern_chip.head == NULL) + return -ENOMEM; + ATOMIC_INIT_NOTIFIER_HEAD(mv_phy->extern_chip.head); + platform_set_drvdata(pdev, mv_phy); the_phy = mv_phy; diff --git a/include/linux/platform_data/mv_usb.h b/include/linux/platform_data/mv_usb.h index fd3d1b4..dc25d60 100644 --- a/include/linux/platform_data/mv_usb.h +++ b/include/linux/platform_data/mv_usb.h @@ -28,16 +28,13 @@ enum { VBUS_HIGH = 1 << 0, }; -struct mv_usb_addon_irq { - unsigned int irq; - int (*poll)(void); -}; - +#define MV_USB_HAS_VBUS_DETECTION (1 << 0) +#define MV_USB_HAS_IDPIN_DETECTION (1 << 1) struct mv_usb_platform_data { unsigned int clknum; char **clkname; - struct mv_usb_addon_irq *id; /* Only valid for OTG. ID pin change*/ - struct mv_usb_addon_irq *vbus; /* valid for OTG/UDC. VBUS change*/ + + unsigned int extern_attr; /* only valid for HCD. OTG or Host only*/ unsigned int mode; @@ -45,9 +42,7 @@ struct mv_usb_platform_data { /* This flag is used for that needs id pin checked by otg */ unsigned int disable_otg_clock_gating:1; /* Force a_bus_req to be asserted */ - unsigned int otg_force_a_bus_req:1; - - int (*set_vbus)(unsigned int vbus); + unsigned int otg_force_a_bus_req:1; }; struct mv_usb_phy_platform_data { diff --git a/include/linux/usb/mv_usb2.h b/include/linux/usb/mv_usb2.h index 9744a97..e0246d9 100644 --- a/include/linux/usb/mv_usb2.h +++ b/include/linux/usb/mv_usb2.h @@ -17,6 +17,33 @@ #include +enum { + EVENT_VBUS, + EVENT_ID, +}; + +struct pxa_usb_vbus_ops { + int (*get_vbus)(unsigned int *level); + int (*set_vbus)(unsigned int level); + int (*init)(void); +}; + +struct pxa_usb_idpin_ops { + int (*get_idpin)(unsigned int *level); + int (*init)(void); +}; + +struct pxa_usb_extern_ops { + struct pxa_usb_vbus_ops vbus; + struct pxa_usb_idpin_ops idpin; +}; + +struct mv_usb2_extern_chip { + unsigned int id; + struct pxa_usb_extern_ops ops; + struct atomic_notifier_head *head; +}; + struct mv_usb2_phy { struct platform_device *pdev; struct mutex phy_lock; @@ -26,6 +53,8 @@ struct mv_usb2_phy { struct clk **clks; unsigned int clks_num; + struct mv_usb2_extern_chip extern_chip; + int (*init)(struct mv_usb2_phy *mv_phy); void (*shutdown)(struct mv_usb2_phy *mv_phy); }; @@ -34,10 +63,66 @@ struct mv_usb2_phy { extern struct mv_usb2_phy *mv_usb2_get_phy(void); +#define mv_usb2_has_extern_call(phy, o, f, arg...)( \ +{ \ + int ret; \ + ret = (!phy ? 0 : ((phy->extern_chip.ops.o.f) ? \ + 1 : 0)); \ + ret; \ +} \ +) + +#define mv_usb2_extern_call(phy, o, f, args...)( \ +{ \ + int ret; \ + ret = (!phy ? -ENODEV : ((phy->extern_chip.ops.o.f) ? \ + phy->extern_chip.ops.o.f(args) : -ENOIOCTLCMD));\ + ret; \ +} \ +) + +#define mv_usb2_set_extern_call(phy, o, f, p)( \ +{ \ + int ret; \ + ret = !phy ? -ENODEV : ((phy->extern_chip.ops.o.f) ? \ + -EINVAL : ({phy->extern_chip.ops.o.f = p; 0; })); \ + ret; \ +} \ +) + +extern int mv_usb2_register_notifier(struct mv_usb2_phy *phy, + struct notifier_block *nb); +extern int mv_usb2_unregister_notifier(struct mv_usb2_phy *phy, + struct notifier_block *nb); +extern int mv_usb2_notify(struct mv_usb2_phy *phy, unsigned long val, void *v); + #else struct mv_usb2_phy *mv_usb2_get_phy(void) { return NULL; } +#define mv_usb2_has_extern_call(phy, o, f, arg...)(0) + +#define mv_usb2_extern_call(phy, o, f, args...)(0) + +#define mv_usb2_set_extern_call(phy, o, f, p)(0) + +int mv_usb2_register_notifier(struct mv_usb2_phy *phy, + struct notifier_block *nb) +{ + return -EINVAL; +} + +int mv_usb2_unregister_notifier(struct mv_usb2_phy *phy, + struct notifier_block *nb) +{ + return -EINVAL; +} + +int mv_usb2_notify(struct mv_usb2_phy *phy, unsigned long val, void *v) +{ + return 0; +} + #endif #endif