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Date: Mon, 14 Nov 2016 11:36:17 -0600
From: Bin Liu <b-liu@...com>
To: Alexandre Bailon <abailon@...libre.com>
CC: <david@...hnology.com>, <balbi@...nel.org>, <kishon@...com>,
<khilman@...libre.com>, <linux-kernel@...r.kernel.org>,
<linux-usb@...r.kernel.org>, <nsekhar@...com>
Subject: Re: [PATCH v5 3/4] usb: musb: Add a new argument to
musb_platform_set_mode()
Hi,
On Mon, Nov 07, 2016 at 02:05:07PM +0100, Alexandre Bailon wrote:
> During the init, the driver will use musb_platform_set_mode()
> to configure the controller mode and the PHY mode.
> The PHY of DA8xx has some issues when the PHY is forced in host or device,
> so we want to keep it in OTG mode unless the user request a specific mode
> by using the sysfs.
> Add the init argument to musb_platform_set_mode() in order to let the
> callback change its behavior if it is called during the init.
Tony's patch set which fixes musb pm regression (but has not been merged
yet) introduces musb->is_initialized. You might want to use this new
variable in da8xx_musb_set_mode(), instead of adding this init flag.
Regards,
-Bin.
>
> Signed-off-by: Alexandre Bailon <abailon@...libre.com>
> ---
> drivers/usb/musb/am35x.c | 2 +-
> drivers/usb/musb/blackfin.c | 2 +-
> drivers/usb/musb/da8xx.c | 2 +-
> drivers/usb/musb/davinci.c | 2 +-
> drivers/usb/musb/musb_core.c | 12 ++++++------
> drivers/usb/musb/musb_core.h | 6 +++---
> drivers/usb/musb/musb_dsps.c | 2 +-
> drivers/usb/musb/sunxi.c | 2 +-
> drivers/usb/musb/tusb6010.c | 2 +-
> 9 files changed, 16 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c
> index 50ca805..7136888 100644
> --- a/drivers/usb/musb/am35x.c
> +++ b/drivers/usb/musb/am35x.c
> @@ -332,7 +332,7 @@ static irqreturn_t am35x_musb_interrupt(int irq, void *hci)
> return ret;
> }
>
> -static int am35x_musb_set_mode(struct musb *musb, u8 musb_mode)
> +static int am35x_musb_set_mode(struct musb *musb, u8 musb_mode, bool init)
> {
> struct device *dev = musb->controller;
> struct musb_hdrc_platform_data *plat = dev_get_platdata(dev);
> diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c
> index 310238c..544e98f 100644
> --- a/drivers/usb/musb/blackfin.c
> +++ b/drivers/usb/musb/blackfin.c
> @@ -356,7 +356,7 @@ static int bfin_musb_vbus_status(struct musb *musb)
> return 0;
> }
>
> -static int bfin_musb_set_mode(struct musb *musb, u8 musb_mode)
> +static int bfin_musb_set_mode(struct musb *musb, u8 musb_mode, bool init)
> {
> return -EIO;
> }
> diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c
> index 6749aa1..ac0c2f7 100644
> --- a/drivers/usb/musb/da8xx.c
> +++ b/drivers/usb/musb/da8xx.c
> @@ -335,7 +335,7 @@ static irqreturn_t da8xx_musb_interrupt(int irq, void *hci)
> return ret;
> }
>
> -static int da8xx_musb_set_mode(struct musb *musb, u8 musb_mode)
> +static int da8xx_musb_set_mode(struct musb *musb, u8 musb_mode, bool init)
> {
> struct da8xx_glue *glue = dev_get_drvdata(musb->controller->parent);
> enum phy_mode phy_mode;
> diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c
> index cee61a5..d12b902 100644
> --- a/drivers/usb/musb/davinci.c
> +++ b/drivers/usb/musb/davinci.c
> @@ -369,7 +369,7 @@ static irqreturn_t davinci_musb_interrupt(int irq, void *__hci)
> return retval;
> }
>
> -static int davinci_musb_set_mode(struct musb *musb, u8 mode)
> +static int davinci_musb_set_mode(struct musb *musb, u8 mode, bool init)
> {
> /* EVM can't do this (right?) */
> return -EIO;
> diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
> index 27dadc0..4a8d394 100644
> --- a/drivers/usb/musb/musb_core.c
> +++ b/drivers/usb/musb/musb_core.c
> @@ -1730,11 +1730,11 @@ musb_mode_store(struct device *dev, struct device_attribute *attr,
>
> spin_lock_irqsave(&musb->lock, flags);
> if (sysfs_streq(buf, "host"))
> - status = musb_platform_set_mode(musb, MUSB_HOST);
> + status = musb_platform_set_mode(musb, MUSB_HOST, false);
> else if (sysfs_streq(buf, "peripheral"))
> - status = musb_platform_set_mode(musb, MUSB_PERIPHERAL);
> + status = musb_platform_set_mode(musb, MUSB_PERIPHERAL, false);
> else if (sysfs_streq(buf, "otg"))
> - status = musb_platform_set_mode(musb, MUSB_OTG);
> + status = musb_platform_set_mode(musb, MUSB_OTG, false);
> else
> status = -EINVAL;
> spin_unlock_irqrestore(&musb->lock, flags);
> @@ -2261,13 +2261,13 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
> status = musb_host_setup(musb, plat->power);
> if (status < 0)
> goto fail3;
> - status = musb_platform_set_mode(musb, MUSB_HOST);
> + status = musb_platform_set_mode(musb, MUSB_HOST, true);
> break;
> case MUSB_PORT_MODE_GADGET:
> status = musb_gadget_setup(musb);
> if (status < 0)
> goto fail3;
> - status = musb_platform_set_mode(musb, MUSB_PERIPHERAL);
> + status = musb_platform_set_mode(musb, MUSB_PERIPHERAL, true);
> break;
> case MUSB_PORT_MODE_DUAL_ROLE:
> status = musb_host_setup(musb, plat->power);
> @@ -2278,7 +2278,7 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
> musb_host_cleanup(musb);
> goto fail3;
> }
> - status = musb_platform_set_mode(musb, MUSB_OTG);
> + status = musb_platform_set_mode(musb, MUSB_OTG, true);
> break;
> default:
> dev_err(dev, "unsupported port mode %d\n", musb->port_mode);
> diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
> index 2cb88a49..1bfc8fa 100644
> --- a/drivers/usb/musb/musb_core.h
> +++ b/drivers/usb/musb/musb_core.h
> @@ -203,7 +203,7 @@ struct musb_platform_ops {
> struct dma_controller *
> (*dma_init) (struct musb *musb, void __iomem *base);
> void (*dma_exit)(struct dma_controller *c);
> - int (*set_mode)(struct musb *musb, u8 mode);
> + int (*set_mode)(struct musb *musb, u8 mode, bool init);
> void (*try_idle)(struct musb *musb, unsigned long timeout);
> int (*recover)(struct musb *musb);
>
> @@ -558,12 +558,12 @@ static inline void musb_platform_disable(struct musb *musb)
> musb->ops->disable(musb);
> }
>
> -static inline int musb_platform_set_mode(struct musb *musb, u8 mode)
> +static inline int musb_platform_set_mode(struct musb *musb, u8 mode, bool init)
> {
> if (!musb->ops->set_mode)
> return 0;
>
> - return musb->ops->set_mode(musb, mode);
> + return musb->ops->set_mode(musb, mode, init);
> }
>
> static inline void musb_platform_try_idle(struct musb *musb,
> diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
> index 0f17d21..a889679 100644
> --- a/drivers/usb/musb/musb_dsps.c
> +++ b/drivers/usb/musb/musb_dsps.c
> @@ -462,7 +462,7 @@ static int dsps_musb_exit(struct musb *musb)
> return 0;
> }
>
> -static int dsps_musb_set_mode(struct musb *musb, u8 mode)
> +static int dsps_musb_set_mode(struct musb *musb, u8 mode, bool init)
> {
> struct device *dev = musb->controller;
> struct dsps_glue *glue = dev_get_drvdata(dev->parent);
> diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c
> index 1408245..04bf763 100644
> --- a/drivers/usb/musb/sunxi.c
> +++ b/drivers/usb/musb/sunxi.c
> @@ -346,7 +346,7 @@ static void sunxi_musb_dma_controller_destroy(struct dma_controller *c)
> {
> }
>
> -static int sunxi_musb_set_mode(struct musb *musb, u8 mode)
> +static int sunxi_musb_set_mode(struct musb *musb, u8 mode, bool init)
> {
> struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
> enum phy_mode new_mode;
> diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
> index df7c9f4..8a74587 100644
> --- a/drivers/usb/musb/tusb6010.c
> +++ b/drivers/usb/musb/tusb6010.c
> @@ -628,7 +628,7 @@ static void tusb_musb_set_vbus(struct musb *musb, int is_on)
> * Note that if a mini-A cable is plugged in the ID line will stay down as
> * the weak ID pull-up is not able to pull the ID up.
> */
> -static int tusb_musb_set_mode(struct musb *musb, u8 musb_mode)
> +static int tusb_musb_set_mode(struct musb *musb, u8 musb_mode, bool init)
> {
> void __iomem *tbase = musb->ctrl_base;
> u32 otg_stat, phy_otg_ctrl, phy_otg_ena, dev_conf;
> --
> 2.7.3
>
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