From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754899Ab2ISLbC (ORCPT ); Wed, 19 Sep 2012 07:31:02 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:34369 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753650Ab2ISLay (ORCPT ); Wed, 19 Sep 2012 07:30:54 -0400 From: Kishon Vijay Abraham I To: , , , , , , , , , , , CC: Moiz Sonasath Subject: [PATCH 2/4] usb: dwc3: Fix gadget pullup in SS mode Date: Wed, 19 Sep 2012 17:00:27 +0530 Message-ID: <1348054229-27362-3-git-send-email-kishon@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1348054229-27362-1-git-send-email-kishon@ti.com> References: <1348054229-27362-1-git-send-email-kishon@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Moiz Sonasath For the gadget pullup functionality to work in SS mode it requires a particular sequence of toggling the run-stop bit. Here is the required sequence: - Set DCTL[31] - Clear DCTL[31] - Clear OMAP5430_CONTROL_CORE__PHY_POWER_USB[14] - Clear DCTL[8:5] = 0x00 - Set DCTL[8:5] = 0x05 - Wait 25 Ms - Set DCTL[31] - Set OMAP5430_CONTROL_CORE__PHY_POWER_USB[14] Tested rigourously the gadget pull-up functionality in bot HS and SS modes. Signed-off-by: Moiz Sonasath Signed-off-by: Kishon Vijay Abraham I --- drivers/usb/dwc3/gadget.c | 21 +++++++++++++++------ drivers/usb/phy/omap-usb3.c | 16 ++++++++++++++++ include/linux/usb/phy.h | 10 +++++++++- 3 files changed, 40 insertions(+), 7 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 58fdfad..bcc0102 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -49,6 +49,7 @@ #include #include +#include #include "core.h" #include "gadget.h" @@ -1417,19 +1418,27 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on) reg = dwc3_readl(dwc->regs, DWC3_DCTL); if (is_on) { if (dwc->revision <= DWC3_REVISION_187A) { - reg &= ~DWC3_DCTL_TRGTULST_MASK; - reg |= DWC3_DCTL_TRGTULST_RX_DET; + reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK; + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + reg |= DWC3_DCTL_ULSTCHNG_RX_DETECT; + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + mdelay(25); + reg |= DWC3_DCTL_RUN_STOP; + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + usb_phy_poweron(dwc->usb3_phy); } - if (dwc->revision >= DWC3_REVISION_194A) + if (dwc->revision >= DWC3_REVISION_194A) { reg &= ~DWC3_DCTL_KEEP_CONNECT; - reg |= DWC3_DCTL_RUN_STOP; + reg |= DWC3_DCTL_RUN_STOP; + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + } } else { reg &= ~DWC3_DCTL_RUN_STOP; + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + usb_phy_shutdown(dwc->usb3_phy); } - dwc3_writel(dwc->regs, DWC3_DCTL, reg); - do { reg = dwc3_readl(dwc->regs, DWC3_DSTS); if (is_on) { diff --git a/drivers/usb/phy/omap-usb3.c b/drivers/usb/phy/omap-usb3.c index 4dc84ca..26402d5 100644 --- a/drivers/usb/phy/omap-usb3.c +++ b/drivers/usb/phy/omap-usb3.c @@ -212,6 +212,20 @@ static int omap_usb3_init(struct usb_phy *x) return 0; } +static void omap_usb3_poweron(struct usb_phy *x) +{ + struct omap_usb *phy = phy_to_omapusb(x); + + omap5_usb_phy_power(phy, 1); +} + +static void omap_usb3_shutdown(struct usb_phy *x) +{ + struct omap_usb *phy = phy_to_omapusb(x); + + omap5_usb_phy_power(phy, 0); +} + static int __devinit omap_usb3_probe(struct platform_device *pdev) { struct omap_usb *phy; @@ -253,6 +267,8 @@ static int __devinit omap_usb3_probe(struct platform_device *pdev) phy->phy.dev = phy->dev; phy->phy.label = "omap-usb3"; phy->phy.init = omap_usb3_init; + phy->phy.poweron = omap_usb3_poweron; + phy->phy.shutdown = omap_usb3_shutdown; phy->phy.set_suspend = omap_usb3_suspend; phy->is_suspended = 1; diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h index 06b5bae..aaa8e16 100644 --- a/include/linux/usb/phy.h +++ b/include/linux/usb/phy.h @@ -86,8 +86,9 @@ struct usb_phy { /* to support controllers that have multiple transceivers */ struct list_head head; - /* initialize/shutdown the OTG controller */ + /* initialize/poweron/shutdown the OTG controller */ int (*init)(struct usb_phy *x); + void (*poweron)(struct usb_phy *x); void (*shutdown)(struct usb_phy *x); /* effective for B devices, ignored for A-peripheral */ @@ -135,6 +136,13 @@ usb_phy_init(struct usb_phy *x) } static inline void +usb_phy_poweron(struct usb_phy *x) +{ + if (x->poweron) + x->poweron(x); +} + +static inline void usb_phy_shutdown(struct usb_phy *x) { if (x->shutdown) -- 1.7.9.5