On Thu, Feb 27, 2025 at 11:15:40AM +0800, Peter Chen wrote:
> On 25-02-25 13:39:52, Xu Yang wrote:
> > On i.MX95 platform, USB wakeup setting is controlled by HSIO Block
> > Control:
> >
> > HSIO Block Control Overview:
> > - The HSIO block control include configuration and status registers that
> > provide miscellaneous top-level controls for clocking, beat limiter
> > enables, wakeup signal enables and interrupt status for the PCIe and USB
> > interfaces.
> >
> > The wakeup function of HSIO blkctl is basically same as non-core, except
> > improvements about power lost cases. This will add the wakeup setting for
> > HSIO blkctl on i.MX95. It will firstly ioremap hsio blkctl memory, then do
> > wakeup setting as needs.
> >
> > Reviewed-by: Frank Li <Frank.Li@xxxxxxx>
> > Reviewed-by: Jun Li <jun.li@xxxxxxx>
> > Signed-off-by: Xu Yang <xu.yang_2@xxxxxxx>
> >
> > ---
> > Changes in v2:
> > - add Rb tag
> > ---
> > drivers/usb/chipidea/usbmisc_imx.c | 107 +++++++++++++++++++++++++++++
> > 1 file changed, 107 insertions(+)
> >
> > diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
> > index 1394881fde5f..f933fc70be66 100644
> > --- a/drivers/usb/chipidea/usbmisc_imx.c
> > +++ b/drivers/usb/chipidea/usbmisc_imx.c
> > @@ -139,6 +139,22 @@
> > #define MX6_USB_OTG_WAKEUP_BITS (MX6_BM_WAKEUP_ENABLE | MX6_BM_VBUS_WAKEUP | \
> > MX6_BM_ID_WAKEUP | MX6SX_BM_DPDM_WAKEUP_EN)
> >
> > +/*
> > + * HSIO Block Control Register
> > + */
> > +
> > +#define BLKCTL_USB_WAKEUP_CTRL 0x0
> > +#define BLKCTL_OTG_WAKE_ENABLE BIT(31)
> > +#define BLKCTL_OTG_VBUS_SESSVALID BIT(4)
> > +#define BLKCTL_OTG_ID_WAKEUP_EN BIT(2)
> > +#define BLKCTL_OTG_VBUS_WAKEUP_EN BIT(1)
> > +#define BLKCTL_OTG_DPDM_WAKEUP_EN BIT(0)
> > +
> > +#define BLKCTL_WAKEUP_SOURCE (BLKCTL_OTG_WAKE_ENABLE | \
> > + BLKCTL_OTG_ID_WAKEUP_EN | \
> > + BLKCTL_OTG_VBUS_WAKEUP_EN | \
> > + BLKCTL_OTG_DPDM_WAKEUP_EN)
> > +
> > struct usbmisc_ops {
> > /* It's called once when probe a usb device */
> > int (*init)(struct imx_usbmisc_data *data);
> > @@ -159,6 +175,7 @@ struct usbmisc_ops {
> >
> > struct imx_usbmisc {
> > void __iomem *base;
> > + void __iomem *blkctl;
> > spinlock_t lock;
> > const struct usbmisc_ops *ops;
> > };
> > @@ -1016,6 +1033,76 @@ static int usbmisc_imx6sx_power_lost_check(struct imx_usbmisc_data *data)
> > return 0;
> > }
> >
> > +static u32 usbmisc_blkctl_wakeup_setting(struct imx_usbmisc_data *data)
> > +{
> > + u32 wakeup_setting = BLKCTL_WAKEUP_SOURCE;
> > +
> > + if (data->ext_id || data->available_role != USB_DR_MODE_OTG)
> > + wakeup_setting &= ~BLKCTL_OTG_ID_WAKEUP_EN;
> > +
> > + if (data->ext_vbus || data->available_role == USB_DR_MODE_HOST)
> > + wakeup_setting &= ~BLKCTL_OTG_VBUS_WAKEUP_EN;
> > +
> > + /* Select session valid as VBUS wakeup source */
> > + wakeup_setting |= BLKCTL_OTG_VBUS_SESSVALID;
> > +
> > + return wakeup_setting;
> > +}
> > +
> > +static int usbmisc_imx95_set_wakeup(struct imx_usbmisc_data *data, bool enabled)
> > +{
> > + struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
> > + unsigned long flags;
> > + u32 val;
> > +
> > + spin_lock_irqsave(&usbmisc->lock, flags);
> > + val = readl(usbmisc->blkctl + BLKCTL_USB_WAKEUP_CTRL);
> > + val &= ~BLKCTL_WAKEUP_SOURCE;
> > +
> > + if (enabled)
> > + val |= usbmisc_blkctl_wakeup_setting(data);
> > +
> > + writel(val, usbmisc->blkctl + BLKCTL_USB_WAKEUP_CTRL);
> > + spin_unlock_irqrestore(&usbmisc->lock, flags);
> > +
> > + return 0;
> > +}
> > +
> > +static int usbmisc_imx95_init(struct imx_usbmisc_data *data)
> > +{
> > + struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
> > + unsigned long flags;
> > + u32 reg;
> > +
> > + if (data->index >= 1)
> > + return -EINVAL;
> > +
> > + spin_lock_irqsave(&usbmisc->lock, flags);
> > + reg = readl(usbmisc->base);
> > +
> > + if (data->disable_oc) {
> > + reg |= MX6_BM_OVER_CUR_DIS;
> > + } else {
> > + reg &= ~MX6_BM_OVER_CUR_DIS;
> > +
> > + if (data->oc_pol_configured && data->oc_pol_active_low)
> > + reg |= MX6_BM_OVER_CUR_POLARITY;
> > + else if (data->oc_pol_configured)
> > + reg &= ~MX6_BM_OVER_CUR_POLARITY;
> > + }
> > +
> > + if (data->pwr_pol == 1)
> > + reg |= MX6_BM_PWR_POLARITY;
> > +
> > + writel(reg, usbmisc->base);
> > + spin_unlock_irqrestore(&usbmisc->lock, flags);
> > +
> > + /* use HSIO blkctl wakeup as source, disable usbmisc setting*/
> > + usbmisc_imx7d_set_wakeup(data, false);
> > +
> > + return 0;
> > +}
>
> Above code has duplicated with some imx7d and imx7ulp init code,
> Is it possible abstract some common code for all these three platforms?
Sure. Thanks for your suggestion. I'll do it.
Thanks,
Xu Yang
