Re: [PATCH 09/11] USB: dwc3: refactor phy handling

[Thinh Nguyen]

On Tue, Apr 04, 2023, Johan Hovold wrote:
> Refactor the PHY handling using four new helpers to initialise,
> deinitialise, power on and power off all the PHYs.
> 
> Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
> ---
>  drivers/usb/dwc3/core.c | 143 ++++++++++++++++++++++++----------------
>  1 file changed, 86 insertions(+), 57 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index c499ef026500..52cd5ddfebd5 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -721,6 +721,76 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
>  	return 0;
>  }
>  
> +static int dwc3_phy_init(struct dwc3 *dwc)
> +{
> +	int ret;
> +
> +	usb_phy_init(dwc->usb2_phy);
> +	usb_phy_init(dwc->usb3_phy);
> +
> +	ret = phy_init(dwc->usb2_generic_phy);
> +	if (ret < 0)
> +		goto err_shutdown_usb3_phy;
> +
> +	ret = phy_init(dwc->usb3_generic_phy);
> +	if (ret < 0)
> +		goto err_exit_usb2_phy;
> +
> +	return 0;
> +
> +err_exit_usb2_phy:
> +	phy_exit(dwc->usb2_generic_phy);
> +err_shutdown_usb3_phy:
> +	usb_phy_shutdown(dwc->usb3_phy);
> +	usb_phy_shutdown(dwc->usb2_phy);
> +
> +	return ret;
> +}
> +
> +static void dwc3_phy_exit(struct dwc3 *dwc)
> +{
> +	phy_exit(dwc->usb3_generic_phy);
> +	phy_exit(dwc->usb2_generic_phy);
> +
> +	usb_phy_shutdown(dwc->usb3_phy);
> +	usb_phy_shutdown(dwc->usb2_phy);
> +}
> +
> +static int dwc3_phy_power_on(struct dwc3 *dwc)
> +{
> +	int ret;
> +
> +	usb_phy_set_suspend(dwc->usb2_phy, 0);
> +	usb_phy_set_suspend(dwc->usb3_phy, 0);
> +
> +	ret = phy_power_on(dwc->usb2_generic_phy);
> +	if (ret < 0)
> +		goto err_suspend_usb3_phy;
> +
> +	ret = phy_power_on(dwc->usb3_generic_phy);
> +	if (ret < 0)
> +		goto err_power_off_usb2_phy;
> +
> +	return 0;
> +
> +err_power_off_usb2_phy:
> +	phy_power_off(dwc->usb2_generic_phy);
> +err_suspend_usb3_phy:
> +	usb_phy_set_suspend(dwc->usb3_phy, 1);
> +	usb_phy_set_suspend(dwc->usb2_phy, 1);
> +
> +	return ret;
> +}
> +
> +static void dwc3_phy_power_off(struct dwc3 *dwc)
> +{
> +	phy_power_off(dwc->usb3_generic_phy);
> +	phy_power_off(dwc->usb2_generic_phy);
> +
> +	usb_phy_set_suspend(dwc->usb3_phy, 1);
> +	usb_phy_set_suspend(dwc->usb2_phy, 1);
> +}
> +
>  static int dwc3_clk_enable(struct dwc3 *dwc)
>  {
>  	int ret;
> @@ -756,17 +826,8 @@ static void dwc3_clk_disable(struct dwc3 *dwc)
>  static void dwc3_core_exit(struct dwc3 *dwc)
>  {
>  	dwc3_event_buffers_cleanup(dwc);
> -
> -	usb_phy_set_suspend(dwc->usb2_phy, 1);
> -	usb_phy_set_suspend(dwc->usb3_phy, 1);
> -	phy_power_off(dwc->usb2_generic_phy);
> -	phy_power_off(dwc->usb3_generic_phy);
> -
> -	usb_phy_shutdown(dwc->usb2_phy);
> -	usb_phy_shutdown(dwc->usb3_phy);
> -	phy_exit(dwc->usb2_generic_phy);
> -	phy_exit(dwc->usb3_generic_phy);
> -
> +	dwc3_phy_power_off(dwc);
> +	dwc3_phy_exit(dwc);
>  	dwc3_clk_disable(dwc);
>  	reset_control_assert(dwc->reset);
>  }
> @@ -1029,20 +1090,13 @@ static int dwc3_core_init(struct dwc3 *dwc)
>  		dwc->phys_ready = true;
>  	}
>  
> -	usb_phy_init(dwc->usb2_phy);
> -	usb_phy_init(dwc->usb3_phy);
> -
> -	ret = phy_init(dwc->usb2_generic_phy);
> -	if (ret < 0)
> -		goto err_shutdown_usb3_phy;
> -
> -	ret = phy_init(dwc->usb3_generic_phy);
> -	if (ret < 0)
> -		goto err_exit_usb2_phy;
> +	ret = dwc3_phy_init(dwc);
> +	if (ret)
> +		goto err_exit_ulpi;
>  
>  	ret = dwc3_core_soft_reset(dwc);
>  	if (ret)
> -		goto err_exit_usb3_phy;
> +		goto err_exit_phy;
>  
>  	if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD &&
>  	    !DWC3_VER_IS_WITHIN(DWC3, ANY, 194A)) {
> @@ -1073,20 +1127,14 @@ static int dwc3_core_init(struct dwc3 *dwc)
>  
>  	dwc3_set_incr_burst_type(dwc);
>  
> -	usb_phy_set_suspend(dwc->usb2_phy, 0);
> -	usb_phy_set_suspend(dwc->usb3_phy, 0);
> -	ret = phy_power_on(dwc->usb2_generic_phy);
> -	if (ret < 0)
> -		goto err_suspend_usb3_phy;
> -
> -	ret = phy_power_on(dwc->usb3_generic_phy);
> -	if (ret < 0)
> -		goto err_power_off_usb2_phy;
> +	dwc3_phy_power_on(dwc);
> +	if (ret)
> +		goto err_exit_phy;
>  
>  	ret = dwc3_event_buffers_setup(dwc);
>  	if (ret) {
>  		dev_err(dwc->dev, "failed to setup event buffers\n");
> -		goto err_power_off_usb3_phy;
> +		goto err_power_off_phy;
>  	}
>  
>  	/*
> @@ -1203,20 +1251,10 @@ static int dwc3_core_init(struct dwc3 *dwc)
>  
>  	return 0;
>  
> -err_power_off_usb3_phy:
> -	phy_power_off(dwc->usb3_generic_phy);
> -err_power_off_usb2_phy:
> -	phy_power_off(dwc->usb2_generic_phy);
> -err_suspend_usb3_phy:
> -	usb_phy_set_suspend(dwc->usb3_phy, 1);
> -	usb_phy_set_suspend(dwc->usb2_phy, 1);
> -err_exit_usb3_phy:
> -	phy_exit(dwc->usb3_generic_phy);
> -err_exit_usb2_phy:
> -	phy_exit(dwc->usb2_generic_phy);
> -err_shutdown_usb3_phy:
> -	usb_phy_shutdown(dwc->usb3_phy);
> -	usb_phy_shutdown(dwc->usb2_phy);
> +err_power_off_phy:
> +	dwc3_phy_power_off(dwc);
> +err_exit_phy:
> +	dwc3_phy_exit(dwc);
>  err_exit_ulpi:
>  	dwc3_ulpi_exit(dwc);
>  
> @@ -1832,17 +1870,8 @@ static int dwc3_probe(struct platform_device *pdev)
>  err_exit_debugfs:
>  	dwc3_debugfs_exit(dwc);
>  	dwc3_event_buffers_cleanup(dwc);
> -
> -	usb_phy_set_suspend(dwc->usb2_phy, 1);
> -	usb_phy_set_suspend(dwc->usb3_phy, 1);
> -	phy_power_off(dwc->usb2_generic_phy);
> -	phy_power_off(dwc->usb3_generic_phy);
> -
> -	usb_phy_shutdown(dwc->usb2_phy);
> -	usb_phy_shutdown(dwc->usb3_phy);
> -	phy_exit(dwc->usb2_generic_phy);
> -	phy_exit(dwc->usb3_generic_phy);
> -
> +	dwc3_phy_power_off(dwc);
> +	dwc3_phy_exit(dwc);
>  	dwc3_ulpi_exit(dwc);
>  err_free_event_buffers:
>  	dwc3_free_event_buffers(dwc);
> -- 
> 2.39.2
> 

Acked-by: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>

Thanks,
Thinh