Re: [PATCH 05/12] usb: chipidea: introduce ci_platform_config

[Peter Chen <peter.chen-KZfg59tc24xl57MIdRCFDg@public.gmane.org>]

On Thu, Mar 19, 2015 at 11:19:29AM +0100, Michael Grzeschik wrote:
> On Thu, Mar 19, 2015 at 09:19:16AM +0800, Peter Chen wrote:
> > It is used to configure controller parameters according to
> > platform data, like speed, interrupt threshold, stream mode, etc.
> > 
> > Signed-off-by: Peter Chen <peter.chen-KZfg59tc24xl57MIdRCFDg@public.gmane.org>
> > ---
> >  drivers/usb/chipidea/ci.h   |  2 ++
> >  drivers/usb/chipidea/core.c | 57 +++++++++++++++++++++++++++++++--------------
> >  drivers/usb/chipidea/host.c |  6 +----
> >  3 files changed, 43 insertions(+), 22 deletions(-)
> > 
> > diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
> > index aeec5f0..888606b 100644
> > --- a/drivers/usb/chipidea/ci.h
> > +++ b/drivers/usb/chipidea/ci.h
> > @@ -426,4 +426,6 @@ u8 hw_port_test_get(struct ci_hdrc *ci);
> >  int hw_wait_reg(struct ci_hdrc *ci, enum ci_hw_regs reg, u32 mask,
> >  				u32 value, unsigned int timeout_ms);
> >  
> > +void ci_platform_config(struct ci_hdrc *ci, int usb_mode);
> > +
> >  #endif	/* __DRIVERS_USB_CHIPIDEA_CI_H */
> > diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
> > index 4d79392..f713e32 100644
> > --- a/drivers/usb/chipidea/core.c
> > +++ b/drivers/usb/chipidea/core.c
> > @@ -403,6 +403,44 @@ static int ci_usb_phy_init(struct ci_hdrc *ci)
> >  	return ret;
> >  }
> >  
> > +
> > +/**
> > + * ci_platform_config: do controller configure
> > + * @ci: the controller
> > + * @usb_mode: the usb mode
> > + *
> > + */
> > +void ci_platform_config(struct ci_hdrc *ci, int usb_mode)
> > +{
> > +	if (usb_mode == USBMODE_CM_DC) {
> > +		if (ci->platdata->flags & CI_HDRC_DISABLE_DEVICE_STREAMING)
> > +			hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS,
> > +					USBMODE_CI_SDIS);
> > +
> > +		/*
> > +		 * Set interrupt interval for device mode
> > +		 * host set ITC according to ehci-hcd module
> > +		 * parameter log2_irq_thresh
> > +		 */
> > +		hw_write(ci, OP_USBCMD, 0xff0000,
> > +			ci->platdata->gadget_itc_setting << 16);
> > +	} else if (usb_mode == USBMODE_CM_HC) {
> > +		if (ci->platdata->flags & CI_HDRC_DISABLE_HOST_STREAMING)
> > +			hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS,
> > +					USBMODE_CI_SDIS);
> > +	} else {
> > +		dev_warn(ci->dev, "USB mode in still not set\n");
> > +	}
> > +
> > +	if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED) {
> > +		if (ci->hw_bank.lpm)
> > +			hw_write(ci, OP_DEVLC, DEVLC_PFSC, DEVLC_PFSC);
> > +		else
> > +			hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC);
> > +	}
> > +
> > +}
> > +
> >  /**
> >   * hw_controller_reset: do controller reset
> >   * @ci: the controller
> > @@ -447,35 +485,20 @@ int hw_device_reset(struct ci_hdrc *ci)
> >  		ci->platdata->notify_event(ci,
> >  			CI_HDRC_CONTROLLER_RESET_EVENT);
> >  
> > -	if (ci->platdata->flags & CI_HDRC_DISABLE_DEVICE_STREAMING)
> > -		hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
> > -
> > -	if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED) {
> > -		if (ci->hw_bank.lpm)
> > -			hw_write(ci, OP_DEVLC, DEVLC_PFSC, DEVLC_PFSC);
> > -		else
> > -			hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC);
> > -	}
> > -
> >  	/* USBMODE should be configured step by step */
> >  	hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
> >  	hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_DC);
> >  	/* HW >= 2.3 */
> >  	hw_write(ci, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM);
> >  
> > -	/*
> > -	 * Set interrupt interval for device mode
> > -	 * host set ITC according to ehci-hcd module parameter log2_irq_thresh
> > -	 */
> > -	hw_write(ci, OP_USBCMD, 0xff0000,
> > -		ci->platdata->gadget_itc_setting << 16);
> > -
> 
> This codepath was added by patch 02 "usb: chipidea: set ITC to 0 for
> device mode". You should add it after this one, so this code gets added
> directly to its final position.
> 

Thanks, I will add ITC tuning as the first user for ci_platform_config

Peter
> >  	if (hw_read(ci, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DC) {
> >  		pr_err("cannot enter in %s device mode", ci_role(ci)->name);
> >  		pr_err("lpm = %i", ci->hw_bank.lpm);
> >  		return -ENODEV;
> >  	}
> >  
> > +	ci_platform_config(ci, USBMODE_CM_DC);
> > +
> >  	return 0;
> >  }
> >  
> > diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
> > index b262c1c..c4f76b7 100644
> > --- a/drivers/usb/chipidea/host.c
> > +++ b/drivers/usb/chipidea/host.c
> > @@ -141,11 +141,7 @@ static int host_start(struct ci_hdrc *ci)
> >  		}
> >  	}
> >  
> > -	if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED)
> > -		hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC);
> > -
> > -	if (ci->platdata->flags & CI_HDRC_DISABLE_HOST_STREAMING)
> > -		hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
> > +	ci_platform_config(ci, USBMODE_CM_HC);
> >  
> >  	return ret;
> >  
> > -- 
> > 1.9.1
> > 
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-- 

Best Regards,
Peter Chen
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