Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1548082 > unrolled thread

[PATCH v6 23/25] usb: chipidea: Pullup D+ in device mode via phy APIs

Back to article view | Back to linux.kernel

This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by below is the oldest one visible, not the original post.

Contents

  [PATCH v6 23/25] usb: chipidea: Pullup D+ in device mode via phy APIs Stephen Boyd <stephen.boyd@linaro.org> - 2016-12-29 00:00 +0100
    Re: [PATCH v6 23/25] usb: chipidea: Pullup D+ in device mode via phy  APIs Peter Chen <hzpeterchen@gmail.com> - 2017-01-03 08:00 +0100

#1548082 — [PATCH v6 23/25] usb: chipidea: Pullup D+ in device mode via phy APIs

If the phy supports it, call phy_set_mode() to pull up D+ when
required by setting the mode to PHY_MODE_USB_DEVICE. If we want
to remove the pullup, set the mode to PHY_MODE_USB_HOST.

Cc: Peter Chen <peter.chen@nxp.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
---
 drivers/usb/chipidea/udc.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 0d532a724d48..6d61fa0689b0 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -18,6 +18,7 @@
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/pm_runtime.h>
+#include <linux/phy/phy.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 #include <linux/usb/otg-fsm.h>
@@ -1609,10 +1610,15 @@ static int ci_udc_pullup(struct usb_gadget *_gadget, int is_on)
 		return 0;
 
 	pm_runtime_get_sync(&ci->gadget.dev);
-	if (is_on)
+	if (is_on) {
+		if (ci->phy)
+			phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE);
 		hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
-	else
+	} else {
 		hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
+		if (ci->phy)
+			phy_set_mode(ci->phy, PHY_MODE_USB_HOST);
+	}
 	pm_runtime_put_sync(&ci->gadget.dev);
 
 	return 0;
-- 
2.10.0.297.gf6727b0

[toc] | [next] | [standalone]

#1549570 — Re: [PATCH v6 23/25] usb: chipidea: Pullup D+ in device mode via phy APIs

On Wed, Dec 28, 2016 at 02:57:09PM -0800, Stephen Boyd wrote:
> If the phy supports it, call phy_set_mode() to pull up D+ when
> required by setting the mode to PHY_MODE_USB_DEVICE. If we want
> to remove the pullup, set the mode to PHY_MODE_USB_HOST.
> 
> Cc: Peter Chen <peter.chen@nxp.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
> ---
>  drivers/usb/chipidea/udc.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
> index 0d532a724d48..6d61fa0689b0 100644
> --- a/drivers/usb/chipidea/udc.c
> +++ b/drivers/usb/chipidea/udc.c
> @@ -18,6 +18,7 @@
>  #include <linux/kernel.h>
>  #include <linux/slab.h>
>  #include <linux/pm_runtime.h>
> +#include <linux/phy/phy.h>
>  #include <linux/usb/ch9.h>
>  #include <linux/usb/gadget.h>
>  #include <linux/usb/otg-fsm.h>
> @@ -1609,10 +1610,15 @@ static int ci_udc_pullup(struct usb_gadget *_gadget, int is_on)
>  		return 0;
>  
>  	pm_runtime_get_sync(&ci->gadget.dev);
> -	if (is_on)
> +	if (is_on) {
> +		if (ci->phy)
> +			phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE);
>  		hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS);
> -	else
> +	} else {
>  		hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
> +		if (ci->phy)
> +			phy_set_mode(ci->phy, PHY_MODE_USB_HOST);
> +	}
>  	pm_runtime_put_sync(&ci->gadget.dev);
>  
>  	return 0;
> -- 

Would you describe the use case for it? Why not adding it at
role switch routine?

-- 

Best Regards,
Peter Chen

[toc] | [prev] | [standalone]

Back to top | Article view | linux.kernel

csiph-web