On Tue, Nov 05, 2013 at 10:29:50AM +0800, Shawn Guo wrote:
> On Tue, Nov 05, 2013 at 09:49:33AM +0800, Peter Chen wrote:
> > The mxs-phy has several bugs and features at different
> > versions, the driver code can get it through of_device_id.data.
> >
> > Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
> > ---
> > drivers/usb/phy/phy-mxs-usb.c | 59 ++++++++++++++++++++++++++++++++++------
> > 1 files changed, 50 insertions(+), 9 deletions(-)
> >
> > diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c
> > index fdd33b4..8b9d80c 100644
> > --- a/drivers/usb/phy/phy-mxs-usb.c
> > +++ b/drivers/usb/phy/phy-mxs-usb.c
> > @@ -1,5 +1,5 @@
> > /*
> > - * Copyright 2012 Freescale Semiconductor, Inc.
> > + * Copyright 2012-2013 Freescale Semiconductor, Inc.
> > * Copyright (C) 2012 Marek Vasut <marex@xxxxxxx>
> > * on behalf of DENX Software Engineering GmbH
> > *
> > @@ -20,6 +20,7 @@
> > #include <linux/delay.h>
> > #include <linux/err.h>
> > #include <linux/io.h>
> > +#include <linux/of_device.h>
> >
> > #define DRIVER_NAME "mxs_phy"
> >
> > @@ -34,13 +35,55 @@
> > #define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14)
> > #define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1)
> >
> > +#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)
> > +
> > +/* Do disconnection between PHY and controller without vbus */
> > +#define MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS BIT(0)
> > +
> > +/*
> > + * The PHY will be in messy if there is an wakeup after putting
> > + * bus to suspend (set portsc.suspendM) but before setting PHY to low
> > + * power mode (set portsc.phcd).
> > + */
> > +#define MXS_PHY_ABNORAML_IN_SUSPEND BIT(1)
> > +
> > +/*
> > + * The SOF sends too fast after resuming, it will cause disconnection
> > + * between host and high speed device.
> > + */
> > +#define MXS_PHY_SENDING_SOF_TOO_FAST BIT(2)
> > +
> > +struct mxs_phy_platform_flag {
> > + unsigned int flags;
> > +};
>
> We should design it as a structure not only for flags but any data that
> we may need to define. That said, mxs_phy_platform_flag is not a good
> name to me. I think mxs_phy_data should be more scalable and future
> proof, considering one day we may have more to add into the structure.
>
> > +
> > +static const struct mxs_phy_platform_flag imx23_phy_data = {
> > + .flags = MXS_PHY_ABNORAML_IN_SUSPEND | MXS_PHY_SENDING_SOF_TOO_FAST,
> > +};
> > +
> > +static const struct mxs_phy_platform_flag imx6q_phy_data = {
> > + .flags = MXS_PHY_SENDING_SOF_TOO_FAST |
> > + MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS,
> > +};
> > +
> > +static const struct mxs_phy_platform_flag imx6sl_phy_data = {
> > + .flags = MXS_PHY_DISCONNECT_LINE_WITHOUT_VBUS,
> > +};
> > +
> > +static const struct of_device_id mxs_phy_dt_ids[] = {
> > + { .compatible = "fsl,imx6sl-usbphy", .data = &imx6sl_phy_data, },
> > + { .compatible = "fsl,imx6q-usbphy", .data = &imx6q_phy_data, },
> > + { .compatible = "fsl,imx23-usbphy", .data = &imx23_phy_data, },
> > + { /* sentinel */ }
> > +};
> > +MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids);
> > +
> > struct mxs_phy {
> > struct usb_phy phy;
> > struct clk *clk;
> > + unsigned int flags;
>
> Here, we should have a pointer to struct mxs_phy_data.
>
Will change both of two names.
Peter
> >
> > -#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)
> > -
> > static int mxs_phy_hw_init(struct mxs_phy *mxs_phy)
> > {
> > int ret;
> > @@ -131,6 +174,9 @@ static int mxs_phy_probe(struct platform_device *pdev)
> > struct clk *clk;
> > struct mxs_phy *mxs_phy;
> > int ret;
> > + const struct of_device_id *of_id =
> > + of_match_device(mxs_phy_dt_ids, &pdev->dev);
> > + const struct mxs_phy_platform_flag *platform_flag = of_id->data;
> >
> > res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > base = devm_ioremap_resource(&pdev->dev, res);
> > @@ -163,6 +209,7 @@ static int mxs_phy_probe(struct platform_device *pdev)
> > ATOMIC_INIT_NOTIFIER_HEAD(&mxs_phy->phy.notifier);
> >
> > mxs_phy->clk = clk;
> > + mxs_phy->flags = platform_flag->flags;
> >
> > platform_set_drvdata(pdev, &mxs_phy->phy);
> >
> > @@ -182,12 +229,6 @@ static int mxs_phy_remove(struct platform_device *pdev)
> > return 0;
> > }
> >
> > -static const struct of_device_id mxs_phy_dt_ids[] = {
> > - { .compatible = "fsl,imx23-usbphy", },
> > - { /* sentinel */ }
> > -};
> > -MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids);
> > -
> > static struct platform_driver mxs_phy_driver = {
> > .probe = mxs_phy_probe,
> > .remove = mxs_phy_remove,
> > --
> > 1.7.1
> >
> >
--
Best Regards,
Peter Chen
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