redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

usb: chipidea: add query_available_role interface

Browse source 
The glue layer may need to know current available role to do some
setting, eg, the wakeup setting. So we add ci_hdrc_query_available_role
for that.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
This commit is contained in:
Peter Chen 2020-02-17 09:26:43 +08:00
parent c71d13f9a8
commit 62b9825827
No known key found for this signature in database
GPG key ID: 4859298150D671BB
2 changed files with 29 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

27
drivers/usb/chipidea/core.c
View file

@ -877,6 +877,33 @@ void ci_hdrc_remove_device(struct platform_device *pdev)
}
EXPORT_SYMBOL_GPL(ci_hdrc_remove_device);
/**
* ci_hdrc_query_available_role: get runtime available operation mode
*
* The glue layer can get current operation mode (host/peripheral/otg)
* This function should be called after ci core device has created.
*
* @pdev: the platform device of ci core.
*
* Return runtime usb_dr_mode.
*/
enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev)
{
struct ci_hdrc *ci = platform_get_drvdata(pdev);
if (!ci)
return USB_DR_MODE_UNKNOWN;
if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])
return USB_DR_MODE_OTG;
else if (ci->roles[CI_ROLE_HOST])
return USB_DR_MODE_HOST;
else if (ci->roles[CI_ROLE_GADGET])
return USB_DR_MODE_PERIPHERAL;
else
return USB_DR_MODE_UNKNOWN;
}
EXPORT_SYMBOL_GPL(ci_hdrc_query_available_role);
static inline void ci_role_destroy(struct ci_hdrc *ci)
{
ci_hdrc_gadget_destroy(ci);

2
include/linux/usb/chipidea.h
View file

@ -99,5 +99,7 @@ struct platform_device *ci_hdrc_add_device(struct device *dev,
struct ci_hdrc_platform_data *platdata);
/* Remove ci hdrc device */
void ci_hdrc_remove_device(struct platform_device *pdev);
/* Get current available role */
enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev);
#endif