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usb: chipidea: add role switch class support

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USB role is fully controlled by usb role switch consumer(e.g. typec),
usb port can be at host mode(USB_ROLE_HOST), device mode connected to
host(USB_ROLE_DEVICE), or not connecting any partner(USB_ROLE_NONE).

Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
This commit is contained in:
Li Jun
2019-08-26 18:25:12 +08:00
committed by Peter Chen
parent 71fcb8bdf5
commit 05559f10ed
4 changed files with 100 additions and 4 deletions
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12
drivers/usb/chipidea/ci.h
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@@ -16,6 +16,7 @@
#include <linux/usb/gadget.h>
#include <linux/usb/otg-fsm.h>
#include <linux/usb/otg.h>
#include <linux/usb/role.h>
#include <linux/ulpi/interface.h>
/******************************************************************************
@@ -217,6 +218,7 @@ struct ci_hdrc {
ktime_t hr_timeouts[NUM_OTG_FSM_TIMERS];
unsigned enabled_otg_timer_bits;
enum otg_fsm_timer next_otg_timer;
struct usb_role_switch *role_switch;
struct work_struct work;
struct workqueue_struct *wq;
@@ -290,6 +292,16 @@ static inline void ci_role_stop(struct ci_hdrc *ci)
ci->roles[role]->stop(ci);
}
static inline enum usb_role ci_role_to_usb_role(struct ci_hdrc *ci)
{
if (ci->role == CI_ROLE_HOST)
return USB_ROLE_HOST;
else if (ci->role == CI_ROLE_GADGET && ci->vbus_active)
return USB_ROLE_DEVICE;
else
return USB_ROLE_NONE;
}
/**
* hw_read_id_reg: reads from a identification register
* @ci: the controller