[PATCH v3 01/11] usb: phy-mxs: Add platform judgement code

[Shawn Guo]

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 at freescale.com>
> ---
>  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 at denx.de>
>   * 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.

Shawn

>  };
>  
> -#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
> 
>