From: Douglas Anderson <dianders@chromium.org> To: Minas Harutyunyan <hminas@synopsys.com>, Felipe Balbi <felipe.balbi@linux.intel.com>, heiko@sntech.de Cc: Alan Stern <stern@rowland.harvard.edu>, Artur Petrosyan <Arthur.Petrosyan@synopsys.com>, amstan@chromium.org, linux-rockchip@lists.infradead.org, William Wu <william.wu@rock-chips.com>, linux-usb@vger.kernel.org, Stefan Wahren <stefan.wahren@i2se.com>, Randy Li <ayaka@soulik.info>, zyw@rock-chips.com, mka@chromium.org, ryandcase@chromium.org, Amelie Delaunay <amelie.delaunay@st.com>, jwerner@chromium.org, dinguyen@opensource.altera.com, Elaine Zhang <zhangqing@rock-chips.com>, Douglas Anderson <dianders@chromium.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/5] usb: dwc2: bus suspend/resume for hosts with DWC2_POWER_DOWN_PARAM_NONE Date: Wed, 17 Apr 2019 17:13:52 -0700 [thread overview] Message-ID: <20190418001356.124334-2-dianders@chromium.org> (raw) In-Reply-To: <20190418001356.124334-1-dianders@chromium.org> This is an attempt to rehash commit 0cf884e819e0 ("usb: dwc2: add bus suspend/resume for dwc2") on ToT. That commit was reverted in commit b0bb9bb6ce01 ("Revert "usb: dwc2: add bus suspend/resume for dwc2"") because apparently it broke the Altera SOCFPGA. With all the changes that have happened to dwc2 in the meantime, it's possible that the Altera SOCFPGA will just magically work with this change now. ...and it would be good to get bus suspend/resume implemented. This change is a forward port of one that's been living in the Chrome OS 3.14 kernel tree. Signed-off-by: Douglas Anderson <dianders@chromium.org> --- This patch was last posted at: https://lkml.kernel.org/r/1446237173-15263-1-git-send-email-dianders@chromium.org ...and appears to have died the death of silence. Maybe it could get some bake time in linuxnext if we can't find any proactive testing? I will also freely admit that I don't know tons about the theory behind this patch. I'm mostly just re-hashing the original commit from Kever that was reverted since: * Turning on partial power down on rk3288 doesn't "just work". I don't get hotplug events. This is despite dwc2 auto-detecting that we are power optimized. * If we don't do something like this commit we don't get into as low of a power mode. Changes in v2: None drivers/usb/dwc2/hcd.c | 84 ++++++++++++++++++++++++++---------------- 1 file changed, 53 insertions(+), 31 deletions(-) diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index e272d020012e..978232a9e4a8 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -4482,6 +4482,7 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) unsigned long flags; int ret = 0; u32 hprt0; + u32 pcgctl; spin_lock_irqsave(&hsotg->lock, flags); @@ -4497,7 +4498,7 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) if (hsotg->op_state == OTG_STATE_B_PERIPHERAL) goto unlock; - if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL) + if (hsotg->params.power_down > DWC2_POWER_DOWN_PARAM_PARTIAL) goto skip_power_saving; /* @@ -4506,21 +4507,35 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) */ if (!hsotg->bus_suspended) { hprt0 = dwc2_read_hprt0(hsotg); - hprt0 |= HPRT0_SUSP; - hprt0 &= ~HPRT0_PWR; - dwc2_writel(hsotg, hprt0, HPRT0); - spin_unlock_irqrestore(&hsotg->lock, flags); - dwc2_vbus_supply_exit(hsotg); - spin_lock_irqsave(&hsotg->lock, flags); + if (hprt0 & HPRT0_CONNSTS) { + hprt0 |= HPRT0_SUSP; + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) + hprt0 &= ~HPRT0_PWR; + dwc2_writel(hsotg, hprt0, HPRT0); + } + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) { + spin_unlock_irqrestore(&hsotg->lock, flags); + dwc2_vbus_supply_exit(hsotg); + spin_lock_irqsave(&hsotg->lock, flags); + } else { + pcgctl = readl(hsotg->regs + PCGCTL); + pcgctl |= PCGCTL_STOPPCLK; + writel(pcgctl, hsotg->regs + PCGCTL); + } } - /* Enter partial_power_down */ - ret = dwc2_enter_partial_power_down(hsotg); - if (ret) { - if (ret != -ENOTSUPP) - dev_err(hsotg->dev, - "enter partial_power_down failed\n"); - goto skip_power_saving; + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) { + /* Enter partial_power_down */ + ret = dwc2_enter_partial_power_down(hsotg); + if (ret) { + if (ret != -ENOTSUPP) + dev_err(hsotg->dev, + "enter partial_power_down failed\n"); + goto skip_power_saving; + } + + /* After entering partial_power_down, hardware is no more accessible */ + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); } /* Ask phy to be suspended */ @@ -4530,9 +4545,6 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) spin_lock_irqsave(&hsotg->lock, flags); } - /* After entering partial_power_down, hardware is no more accessible */ - clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); - skip_power_saving: hsotg->lx_state = DWC2_L2; unlock: @@ -4545,6 +4557,7 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) { struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); unsigned long flags; + u32 pcgctl; int ret = 0; spin_lock_irqsave(&hsotg->lock, flags); @@ -4555,17 +4568,11 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) if (hsotg->lx_state != DWC2_L2) goto unlock; - if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL) { + if (hsotg->params.power_down > DWC2_POWER_DOWN_PARAM_PARTIAL) { hsotg->lx_state = DWC2_L0; goto unlock; } - /* - * Set HW accessible bit before powering on the controller - * since an interrupt may rise. - */ - set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); - /* * Enable power if not already done. * This must not be spinlocked since duration @@ -4577,10 +4584,23 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) spin_lock_irqsave(&hsotg->lock, flags); } - /* Exit partial_power_down */ - ret = dwc2_exit_partial_power_down(hsotg, true); - if (ret && (ret != -ENOTSUPP)) - dev_err(hsotg->dev, "exit partial_power_down failed\n"); + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) { + /* + * Set HW accessible bit before powering on the controller + * since an interrupt may rise. + */ + set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + + + /* Exit partial_power_down */ + ret = dwc2_exit_partial_power_down(hsotg, true); + if (ret && (ret != -ENOTSUPP)) + dev_err(hsotg->dev, "exit partial_power_down failed\n"); + } else { + pcgctl = readl(hsotg->regs + PCGCTL); + pcgctl &= ~PCGCTL_STOPPCLK; + writel(pcgctl, hsotg->regs + PCGCTL); + } hsotg->lx_state = DWC2_L0; @@ -4592,10 +4612,12 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) spin_unlock_irqrestore(&hsotg->lock, flags); dwc2_port_resume(hsotg); } else { - dwc2_vbus_supply_init(hsotg); + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) { + dwc2_vbus_supply_init(hsotg); - /* Wait for controller to correctly update D+/D- level */ - usleep_range(3000, 5000); + /* Wait for controller to correctly update D+/D- level */ + usleep_range(3000, 5000); + } /* * Clear Port Enable and Port Status changes. -- 2.21.0.593.g511ec345e18-goog
WARNING: multiple messages have this Message-ID (diff)
From: Doug Anderson <dianders@chromium.org> To: Minas Harutyunyan <hminas@synopsys.com>, Felipe Balbi <felipe.balbi@linux.intel.com>, heiko@sntech.de Cc: Alan Stern <stern@rowland.harvard.edu>, Artur Petrosyan <Arthur.Petrosyan@synopsys.com>, amstan@chromium.org, linux-rockchip@lists.infradead.org, William Wu <william.wu@rock-chips.com>, linux-usb@vger.kernel.org, Stefan Wahren <stefan.wahren@i2se.com>, Randy Li <ayaka@soulik.info>, zyw@rock-chips.com, mka@chromium.org, ryandcase@chromium.org, Amelie Delaunay <amelie.delaunay@st.com>, jwerner@chromium.org, dinguyen@opensource.altera.com, Elaine Zhang <zhangqing@rock-chips.com>, Douglas Anderson <dianders@chromium.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linux-kernel@vger.kernel.org Subject: [v2,1/5] usb: dwc2: bus suspend/resume for hosts with DWC2_POWER_DOWN_PARAM_NONE Date: Wed, 17 Apr 2019 17:13:52 -0700 [thread overview] Message-ID: <20190418001356.124334-2-dianders@chromium.org> (raw) This is an attempt to rehash commit 0cf884e819e0 ("usb: dwc2: add bus suspend/resume for dwc2") on ToT. That commit was reverted in commit b0bb9bb6ce01 ("Revert "usb: dwc2: add bus suspend/resume for dwc2"") because apparently it broke the Altera SOCFPGA. With all the changes that have happened to dwc2 in the meantime, it's possible that the Altera SOCFPGA will just magically work with this change now. ...and it would be good to get bus suspend/resume implemented. This change is a forward port of one that's been living in the Chrome OS 3.14 kernel tree. Signed-off-by: Douglas Anderson <dianders@chromium.org> --- This patch was last posted at: https://lkml.kernel.org/r/1446237173-15263-1-git-send-email-dianders@chromium.org ...and appears to have died the death of silence. Maybe it could get some bake time in linuxnext if we can't find any proactive testing? I will also freely admit that I don't know tons about the theory behind this patch. I'm mostly just re-hashing the original commit from Kever that was reverted since: * Turning on partial power down on rk3288 doesn't "just work". I don't get hotplug events. This is despite dwc2 auto-detecting that we are power optimized. * If we don't do something like this commit we don't get into as low of a power mode. Changes in v2: None drivers/usb/dwc2/hcd.c | 84 ++++++++++++++++++++++++++---------------- 1 file changed, 53 insertions(+), 31 deletions(-) diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index e272d020012e..978232a9e4a8 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -4482,6 +4482,7 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) unsigned long flags; int ret = 0; u32 hprt0; + u32 pcgctl; spin_lock_irqsave(&hsotg->lock, flags); @@ -4497,7 +4498,7 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) if (hsotg->op_state == OTG_STATE_B_PERIPHERAL) goto unlock; - if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL) + if (hsotg->params.power_down > DWC2_POWER_DOWN_PARAM_PARTIAL) goto skip_power_saving; /* @@ -4506,21 +4507,35 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) */ if (!hsotg->bus_suspended) { hprt0 = dwc2_read_hprt0(hsotg); - hprt0 |= HPRT0_SUSP; - hprt0 &= ~HPRT0_PWR; - dwc2_writel(hsotg, hprt0, HPRT0); - spin_unlock_irqrestore(&hsotg->lock, flags); - dwc2_vbus_supply_exit(hsotg); - spin_lock_irqsave(&hsotg->lock, flags); + if (hprt0 & HPRT0_CONNSTS) { + hprt0 |= HPRT0_SUSP; + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) + hprt0 &= ~HPRT0_PWR; + dwc2_writel(hsotg, hprt0, HPRT0); + } + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) { + spin_unlock_irqrestore(&hsotg->lock, flags); + dwc2_vbus_supply_exit(hsotg); + spin_lock_irqsave(&hsotg->lock, flags); + } else { + pcgctl = readl(hsotg->regs + PCGCTL); + pcgctl |= PCGCTL_STOPPCLK; + writel(pcgctl, hsotg->regs + PCGCTL); + } } - /* Enter partial_power_down */ - ret = dwc2_enter_partial_power_down(hsotg); - if (ret) { - if (ret != -ENOTSUPP) - dev_err(hsotg->dev, - "enter partial_power_down failed\n"); - goto skip_power_saving; + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) { + /* Enter partial_power_down */ + ret = dwc2_enter_partial_power_down(hsotg); + if (ret) { + if (ret != -ENOTSUPP) + dev_err(hsotg->dev, + "enter partial_power_down failed\n"); + goto skip_power_saving; + } + + /* After entering partial_power_down, hardware is no more accessible */ + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); } /* Ask phy to be suspended */ @@ -4530,9 +4545,6 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) spin_lock_irqsave(&hsotg->lock, flags); } - /* After entering partial_power_down, hardware is no more accessible */ - clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); - skip_power_saving: hsotg->lx_state = DWC2_L2; unlock: @@ -4545,6 +4557,7 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) { struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); unsigned long flags; + u32 pcgctl; int ret = 0; spin_lock_irqsave(&hsotg->lock, flags); @@ -4555,17 +4568,11 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) if (hsotg->lx_state != DWC2_L2) goto unlock; - if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL) { + if (hsotg->params.power_down > DWC2_POWER_DOWN_PARAM_PARTIAL) { hsotg->lx_state = DWC2_L0; goto unlock; } - /* - * Set HW accessible bit before powering on the controller - * since an interrupt may rise. - */ - set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); - /* * Enable power if not already done. * This must not be spinlocked since duration @@ -4577,10 +4584,23 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) spin_lock_irqsave(&hsotg->lock, flags); } - /* Exit partial_power_down */ - ret = dwc2_exit_partial_power_down(hsotg, true); - if (ret && (ret != -ENOTSUPP)) - dev_err(hsotg->dev, "exit partial_power_down failed\n"); + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) { + /* + * Set HW accessible bit before powering on the controller + * since an interrupt may rise. + */ + set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + + + /* Exit partial_power_down */ + ret = dwc2_exit_partial_power_down(hsotg, true); + if (ret && (ret != -ENOTSUPP)) + dev_err(hsotg->dev, "exit partial_power_down failed\n"); + } else { + pcgctl = readl(hsotg->regs + PCGCTL); + pcgctl &= ~PCGCTL_STOPPCLK; + writel(pcgctl, hsotg->regs + PCGCTL); + } hsotg->lx_state = DWC2_L0; @@ -4592,10 +4612,12 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) spin_unlock_irqrestore(&hsotg->lock, flags); dwc2_port_resume(hsotg); } else { - dwc2_vbus_supply_init(hsotg); + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) { + dwc2_vbus_supply_init(hsotg); - /* Wait for controller to correctly update D+/D- level */ - usleep_range(3000, 5000); + /* Wait for controller to correctly update D+/D- level */ + usleep_range(3000, 5000); + } /* * Clear Port Enable and Port Status changes.
next prev parent reply other threads:[~2019-04-18 0:15 UTC|newest] Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-04-18 0:13 [PATCH v2 0/5] USB: dwc2: Allow wakeup from suspend; enable for rk3288-veyron Douglas Anderson 2019-04-18 0:13 ` Douglas Anderson 2019-04-18 0:13 ` Douglas Anderson 2019-04-18 0:13 ` Douglas Anderson [this message] 2019-04-18 0:13 ` [v2,1/5] usb: dwc2: bus suspend/resume for hosts with DWC2_POWER_DOWN_PARAM_NONE Doug Anderson 2019-04-29 8:43 ` [PATCH v2 1/5] " Artur Petrosyan 2019-04-29 8:43 ` Artur Petrosyan 2019-04-29 8:43 ` [v2,1/5] " Artur Petrosyan 2019-04-29 17:33 ` [PATCH v2 1/5] " Doug Anderson 2019-04-29 17:33 ` Doug Anderson 2019-04-29 17:33 ` [v2,1/5] " Doug Anderson 2019-04-30 6:05 ` [PATCH v2 1/5] " Artur Petrosyan 2019-04-30 6:05 ` Artur Petrosyan 2019-04-30 6:05 ` [v2,1/5] " Artur Petrosyan 2019-05-01 1:51 ` [PATCH v2 1/5] " Doug Anderson 2019-05-01 1:51 ` Doug Anderson 2019-05-01 1:51 ` [v2,1/5] " Doug Anderson 2019-05-03 8:20 ` [PATCH v2 1/5] " Artur Petrosyan 2019-05-03 8:20 ` Artur Petrosyan 2019-05-03 8:20 ` [v2,1/5] " Artur Petrosyan 2019-05-03 15:03 ` [PATCH v2 1/5] " Doug Anderson 2019-05-03 15:03 ` Doug Anderson 2019-05-03 15:03 ` [v2,1/5] " Doug Anderson 2019-05-07 7:26 ` [PATCH v2 1/5] " Artur Petrosyan 2019-05-07 7:26 ` Artur Petrosyan 2019-05-01 23:58 ` Doug Anderson 2019-05-01 23:58 ` [v2,1/5] " Doug Anderson 2019-05-03 8:25 ` [PATCH v2 1/5] " Artur Petrosyan 2019-05-03 8:25 ` [v2,1/5] " Artur Petrosyan 2019-05-03 15:07 ` [PATCH v2 1/5] " Doug Anderson 2019-05-03 15:07 ` Doug Anderson 2019-05-03 15:07 ` [v2,1/5] " Doug Anderson 2019-05-07 7:05 ` [PATCH v2 1/5] " Artur Petrosyan 2019-05-07 7:05 ` Artur Petrosyan 2019-04-18 0:13 ` [PATCH v2 2/5] USB: Export usb_wakeup_enabled_descendants() Douglas Anderson 2019-04-18 0:13 ` Douglas Anderson 2019-04-18 0:13 ` [v2,2/5] " Doug Anderson 2019-04-18 0:13 ` [PATCH v2 3/5] Documentation: dt-bindings: Add snps,need-phy-for-wake for dwc2 USB Douglas Anderson 2019-04-18 0:13 ` [v2,3/5] " Doug Anderson 2019-04-25 12:40 ` [PATCH v2 3/5] " Felipe Balbi 2019-04-25 12:40 ` [v2,3/5] " Felipe Balbi 2019-04-25 12:40 ` [PATCH v2 3/5] " Felipe Balbi 2019-04-25 18:09 ` Doug Anderson 2019-04-25 18:09 ` [v2,3/5] " Doug Anderson 2019-04-25 18:09 ` [PATCH v2 3/5] " Doug Anderson 2019-04-25 19:58 ` Doug Anderson 2019-04-25 19:58 ` [v2,3/5] " Doug Anderson 2019-04-25 19:58 ` [PATCH v2 3/5] " Doug Anderson 2019-05-02 18:36 ` Doug Anderson 2019-05-02 18:36 ` [v2,3/5] " Doug Anderson 2019-05-02 18:36 ` [PATCH v2 3/5] " Doug Anderson 2019-04-30 1:23 ` Rob Herring 2019-04-30 1:23 ` [v2,3/5] " Rob Herring 2019-04-30 5:25 ` [PATCH v2 3/5] " Doug Anderson 2019-04-30 5:25 ` [v2,3/5] " Doug Anderson 2019-04-30 5:25 ` [PATCH v2 3/5] " Doug Anderson 2019-04-18 0:13 ` [PATCH v2 4/5] USB: dwc2: Don't turn off the usbphy in suspend if wakeup is enabled Douglas Anderson 2019-04-18 0:13 ` [v2,4/5] " Doug Anderson 2019-04-25 12:41 ` [PATCH v2 4/5] " Felipe Balbi 2019-04-25 12:41 ` Felipe Balbi 2019-04-25 12:41 ` [v2,4/5] " Felipe Balbi 2019-04-18 0:13 ` [PATCH v2 5/5] ARM: dts: rockchip: Allow wakeup from rk3288-veyron's dwc2 USB ports Douglas Anderson 2019-04-18 0:13 ` Douglas Anderson 2019-04-18 0:13 ` [v2,5/5] " Doug Anderson 2019-04-18 12:40 ` [PATCH v2 0/5] USB: dwc2: Allow wakeup from suspend; enable for rk3288-veyron Minas Harutyunyan 2019-04-18 12:40 ` Minas Harutyunyan 2019-04-18 12:40 ` Minas Harutyunyan 2019-04-18 15:54 ` Doug Anderson 2019-04-18 15:54 ` Doug Anderson 2019-04-18 15:54 ` Doug Anderson 2019-04-19 11:43 ` Artur Petrosyan 2019-04-19 11:43 ` Artur Petrosyan 2019-04-19 11:43 ` Artur Petrosyan 2019-04-19 16:44 ` Artur Petrosyan 2019-04-19 16:44 ` Artur Petrosyan 2019-04-19 16:44 ` Artur Petrosyan 2019-04-22 15:50 ` Artur Petrosyan 2019-04-22 15:50 ` Artur Petrosyan 2019-04-22 15:50 ` Artur Petrosyan
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