From: Peter Chen <hzpeterchen@gmail.com>
To: Stephen Boyd <stephen.boyd@linaro.org>
Cc: linux-usb@vger.kernel.org, Felipe Balbi <balbi@kernel.org>,
Arnd Bergmann <arnd@arndb.de>,
Neil Armstrong <narmstrong@baylibre.com>,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Peter Chen <peter.chen@nxp.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andy Gross <andy.gross@linaro.org>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 19/22] usb: chipidea: msm: Handle phy power states
Date: Mon, 11 Jul 2016 13:38:56 +0800 [thread overview]
Message-ID: <20160711053856.GC31647@shlinux2> (raw)
In-Reply-To: <20160707222114.1673-20-stephen.boyd@linaro.org>
On Thu, Jul 07, 2016 at 03:21:10PM -0700, Stephen Boyd wrote:
> The ULPI phy on qcom platforms needs to be initialized and
> powered on after a USB reset and before we toggle the run/stop
> bit. Otherwise, the phy locks up and doesn't work properly. Hook
> the phy initialization into the RESET event and the phy power off
> into the STOPPED event.
>
> Cc: Peter Chen <peter.chen@nxp.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
> drivers/usb/chipidea/ci_hdrc_msm.c | 40 +++++++++++++++++++-------------------
> drivers/usb/chipidea/core.c | 8 ++++++--
> drivers/usb/chipidea/host.c | 8 ++++++--
> include/linux/usb/chipidea.h | 2 +-
> 4 files changed, 33 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/usb/chipidea/ci_hdrc_msm.c b/drivers/usb/chipidea/ci_hdrc_msm.c
> index ab6a7713ee5c..5c486c15e043 100644
> --- a/drivers/usb/chipidea/ci_hdrc_msm.c
> +++ b/drivers/usb/chipidea/ci_hdrc_msm.c
> @@ -75,20 +75,33 @@ static const struct reset_control_ops ci_hdrc_msm_reset_ops = {
> .reset = ci_hdrc_msm_por_reset,
> };
>
> -static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
> +static int ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
> {
> struct device *dev = ci->dev->parent;
> struct ci_hdrc_msm *msm_ci = dev_get_drvdata(dev);
> + int ret;
>
> switch (event) {
> case CI_HDRC_CONTROLLER_RESET_EVENT:
> dev_dbg(dev, "CI_HDRC_CONTROLLER_RESET_EVENT received\n");
> +
> + hw_phymode_configure(ci);
> if (msm_ci->secondary_phy) {
> u32 val = readl_relaxed(msm_ci->base + HS_PHY_SEC_CTRL);
> val |= HS_PHY_DIG_CLAMP_N;
> writel_relaxed(val, msm_ci->base + HS_PHY_SEC_CTRL);
> }
>
> + ret = phy_init(ci->phy);
> + if (ret)
> + return ret;
> +
> + ret = phy_power_on(ci->phy);
> + if (ret) {
> + phy_exit(ci->phy);
> + return ret;
> + }
> +
> /* use AHB transactor, allow posted data writes */
> hw_write_id_reg(ci, HS_PHY_AHB_MODE, 0xffffffff, 0x8);
>
> @@ -108,21 +121,18 @@ static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
> HSPHY_SESS_VLD_CTRL);
>
> }
> -
> - usb_phy_init(ci->usb_phy);
> break;
> case CI_HDRC_CONTROLLER_STOPPED_EVENT:
> dev_dbg(dev, "CI_HDRC_CONTROLLER_STOPPED_EVENT received\n");
> - /*
> - * Put the phy in non-driving mode. Otherwise host
> - * may not detect soft-disconnection.
> - */
> - usb_phy_notify_disconnect(ci->usb_phy, USB_SPEED_UNKNOWN);
> + phy_power_off(ci->phy);
> + phy_exit(ci->phy);
> break;
> default:
> dev_dbg(dev, "unknown ci_hdrc event\n");
> break;
> }
> +
> + return 0;
> }
>
> static int ci_hdrc_msm_mux_phy(struct ci_hdrc_msm *ci,
> @@ -162,7 +172,6 @@ static int ci_hdrc_msm_probe(struct platform_device *pdev)
> {
> struct ci_hdrc_msm *ci;
> struct platform_device *plat_ci;
> - struct usb_phy *phy;
> struct clk *clk;
> struct reset_control *reset;
> struct resource *res;
> @@ -176,21 +185,12 @@ static int ci_hdrc_msm_probe(struct platform_device *pdev)
> return -ENOMEM;
> platform_set_drvdata(pdev, ci);
>
> - /*
> - * OTG(PHY) driver takes care of PHY initialization, clock management,
> - * powering up VBUS, mapping of registers address space and power
> - * management.
> - */
> - phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
> - if (IS_ERR(phy))
> - return PTR_ERR(phy);
> -
> ci->pdata.name = "ci_hdrc_msm";
> ci->pdata.capoffset = DEF_CAPOFFSET;
> ci->pdata.flags = CI_HDRC_REGS_SHARED | CI_HDRC_DISABLE_STREAMING |
> - CI_HDRC_OVERRIDE_AHB_BURST;
> + CI_HDRC_OVERRIDE_AHB_BURST |
> + CI_HDRC_OVERRIDE_PHY_CONTROL;
> ci->pdata.notify_event = ci_hdrc_msm_notify_event;
> - ci->pdata.usb_phy = phy;
>
> reset = devm_reset_control_get(&pdev->dev, "core");
> if (IS_ERR(reset))
> diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
> index f144e1bbcc82..0866c03d66df 100644
> --- a/drivers/usb/chipidea/core.c
> +++ b/drivers/usb/chipidea/core.c
> @@ -327,6 +327,7 @@ void hw_phymode_configure(struct ci_hdrc *ci)
> hw_write(ci, OP_PORTSC, PORTSC_STS, PORTSC_STS);
> }
> }
> +EXPORT_SYMBOL_GPL(hw_phymode_configure);
>
> /**
> * _ci_usb_phy_init: initialize phy taking in account both phy and usb_phy
> @@ -503,9 +504,12 @@ int hw_device_reset(struct ci_hdrc *ci)
> return ret;
> }
>
> - if (ci->platdata->notify_event)
> - ci->platdata->notify_event(ci,
> + if (ci->platdata->notify_event) {
> + ret = ci->platdata->notify_event(ci,
> CI_HDRC_CONTROLLER_RESET_EVENT);
> + if (ret)
> + return ret;
> + }
>
> /* USBMODE should be configured step by step */
> hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
> diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
> index a1d8551ca79d..844be1d02d38 100644
> --- a/drivers/usb/chipidea/host.c
> +++ b/drivers/usb/chipidea/host.c
> @@ -87,8 +87,12 @@ static int ehci_ci_reset(struct usb_hcd *hcd)
> if (ret)
> return ret;
>
> - if (ci->platdata->notify_event)
> - ci->platdata->notify_event(ci, CI_HDRC_CONTROLLER_RESET_EVENT);
> + if (ci->platdata->notify_event) {
> + ret = ci->platdata->notify_event(ci,
> + CI_HDRC_CONTROLLER_RESET_EVENT);
> + if (ret)
> + return ret;
> + }
>
> ci_platform_configure(ci);
>
> diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
> index d07b162073f7..5e76552c81e9 100644
> --- a/include/linux/usb/chipidea.h
> +++ b/include/linux/usb/chipidea.h
> @@ -61,7 +61,7 @@ struct ci_hdrc_platform_data {
> enum usb_dr_mode dr_mode;
> #define CI_HDRC_CONTROLLER_RESET_EVENT 0
> #define CI_HDRC_CONTROLLER_STOPPED_EVENT 1
> - void (*notify_event) (struct ci_hdrc *ci, unsigned event);
> + int (*notify_event) (struct ci_hdrc *ci, unsigned event);
> struct regulator *reg_vbus;
> struct usb_otg_caps ci_otg_caps;
> bool tpl_support;
> --
Acked-by: Peter Chen <peter.chen@nxp.com>
--
Best Regards,
Peter Chen
next prev parent reply other threads:[~2016-07-11 5:46 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-07 22:20 [PATCH v2 00/22] Support qcom's HSIC USB and rewrite USB2 HS phy support Stephen Boyd
2016-07-07 22:20 ` [PATCH v2 02/22] of: device: Export of_device_{get_modalias,uvent_modalias} to modules Stephen Boyd
2016-07-07 22:20 ` [PATCH v2 04/22] usb: chipidea: Only read/write OTGSC from one place Stephen Boyd
2016-07-08 9:14 ` Peter Chen
2016-08-05 21:41 ` Stephen Boyd
2016-08-06 7:42 ` Peter Chen
2016-07-07 22:20 ` [PATCH v2 05/22] usb: chipidea: Handle extcon events properly Stephen Boyd
2016-07-07 22:20 ` [PATCH v2 06/22] usb: chipidea: Add platform flag for wrapper phy management Stephen Boyd
2016-07-08 9:25 ` Peter Chen
2016-08-05 21:46 ` Stephen Boyd
2016-08-06 7:59 ` Peter Chen
2016-08-08 23:46 ` Stephen Boyd
2016-08-09 0:36 ` Peter Chen
2016-07-07 22:20 ` [PATCH v2 07/22] usb: chipidea: Notify events when switching host mode Stephen Boyd
2016-07-08 9:29 ` Peter Chen
2016-07-07 22:20 ` [PATCH v2 08/22] usb: chipidea: Remove locking in ci_udc_start() Stephen Boyd
[not found] ` <20160707222114.1673-9-stephen.boyd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-07-08 9:45 ` Peter Chen
2016-08-05 21:53 ` Stephen Boyd
2016-08-06 7:54 ` Peter Chen
2016-08-08 23:47 ` Stephen Boyd
2016-08-09 0:42 ` Peter Chen
2016-07-07 22:21 ` [PATCH v2 09/22] usb: chipidea: Kick OTG state machine for AVVIS with vbus extcon Stephen Boyd
[not found] ` <20160707222114.1673-10-stephen.boyd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-07-11 2:25 ` Peter Chen
2016-07-07 22:21 ` [PATCH v2 11/22] usb: chipidea: msm: Mark device as runtime pm active Stephen Boyd
2016-07-11 3:19 ` Peter Chen
[not found] ` <20160707222114.1673-1-stephen.boyd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-07-07 22:20 ` [PATCH v2 01/22] of: device: Support loading a module with OF based modalias Stephen Boyd
2016-07-07 22:20 ` [PATCH v2 03/22] usb: ulpi: Support device discovery via device properties Stephen Boyd
2016-07-08 9:04 ` Peter Chen
2016-08-05 21:27 ` Stephen Boyd
2016-08-23 19:58 ` Stephen Boyd
2016-08-24 7:31 ` Heikki Krogerus
2016-08-26 18:54 ` Stephen Boyd
[not found] ` <20160707222114.1673-4-stephen.boyd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-07-18 2:23 ` Rob Herring
2016-08-05 21:40 ` Stephen Boyd
2016-08-23 20:00 ` Stephen Boyd
[not found] ` <CAJOFmgwTPDwdL_cc7f5N09enZNhKwSkWAxdpF39vOBQLfEdVSg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-08-23 23:06 ` Rob Herring
2016-08-24 1:06 ` Stephen Boyd
2016-07-07 22:21 ` [PATCH v2 10/22] usb: chipidea: Add support for ULPI PHY bus Stephen Boyd
2016-07-11 3:10 ` Peter Chen
2016-07-11 22:02 ` Stephen Boyd
2016-07-07 22:21 ` [PATCH v2 12/22] usb: chipidea: msm: Rely on core to override AHBBURST Stephen Boyd
2016-07-11 3:24 ` Peter Chen
2016-07-07 22:21 ` [PATCH v2 13/22] usb: chipidea: msm: Use hw_write_id_reg() instead of writel Stephen Boyd
2016-07-07 22:21 ` [PATCH v2 14/22] usb: chipidea: msm: Add proper clk and reset support Stephen Boyd
2016-07-11 4:32 ` Peter Chen
2016-07-07 22:21 ` [PATCH v2 15/22] usb: chipidea: msm: Mux over secondary phy at the right time Stephen Boyd
[not found] ` <20160707222114.1673-16-stephen.boyd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-07-11 4:43 ` Peter Chen
2016-07-11 22:03 ` Stephen Boyd
2016-07-12 1:07 ` Peter Chen
2016-07-07 22:21 ` [PATCH v2 16/22] usb: chipidea: msm: Restore wrapper settings after reset Stephen Boyd
2016-07-11 5:24 ` Peter Chen
2016-07-07 22:21 ` [PATCH v2 17/22] usb: chipidea: msm: Make platform data driver local instead of global Stephen Boyd
2016-07-11 5:26 ` Peter Chen
2016-07-07 22:21 ` [PATCH v2 19/22] usb: chipidea: msm: Handle phy power states Stephen Boyd
2016-07-11 5:38 ` Peter Chen [this message]
2016-07-07 22:21 ` [PATCH v2 21/22] phy: Add support for Qualcomm's USB HSIC phy Stephen Boyd
2016-07-18 2:27 ` Rob Herring
2016-07-07 22:21 ` [PATCH v2 22/22] phy: Add support for Qualcomm's USB HS phy Stephen Boyd
[not found] ` <20160707222114.1673-23-stephen.boyd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-07-18 2:28 ` Rob Herring
2016-07-07 22:21 ` [PATCH v2 18/22] usb: chipidea: msm: Add reset controller for PHY POR bit Stephen Boyd
[not found] ` <20160707222114.1673-19-stephen.boyd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-07-11 5:32 ` Peter Chen
2016-07-11 22:07 ` Stephen Boyd
2016-07-12 1:09 ` Peter Chen
2016-07-07 22:21 ` [PATCH v2 20/22] usb: chipidea: msm: Be silent on probe defer errors Stephen Boyd
2016-07-11 5:39 ` Peter Chen
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