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usb: chipidea: add vbus interrupt handler

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We add vbus interrupt handler at ci_otg_work, it uses OTGSC_BSV(at otgsc)
to know it is connect or disconnet event.
Meanwhile, we introduce two flags id_event and b_sess_valid_event to
indicate it is an id interrupt or a vbus interrupt.

Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Chen
2013-08-14 12:44:11 +03:00
committed by Greg Kroah-Hartman
parent cbec6bd55a
commit a107f8c505
5 changed files with 72 additions and 13 deletions
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42
drivers/usb/chipidea/otg.c
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@@ -37,13 +37,23 @@ enum ci_role ci_otg_role(struct ci_hdrc *ci)
return role;
}
/**
* ci_role_work - perform role changing based on ID pin
* @work: work struct
*/
static void ci_role_work(struct work_struct *work)
void ci_handle_vbus_change(struct ci_hdrc *ci)
{
u32 otgsc;
if (!ci->is_otg)
return;
otgsc = hw_read(ci, OP_OTGSC, ~0);
if (otgsc & OTGSC_BSV)
usb_gadget_vbus_connect(&ci->gadget);
else
usb_gadget_vbus_disconnect(&ci->gadget);
}
static void ci_handle_id_switch(struct ci_hdrc *ci)
{
struct ci_hdrc *ci = container_of(work, struct ci_hdrc, work);
enum ci_role role = ci_otg_role(ci);
if (role != ci->role) {
@@ -53,17 +63,35 @@ static void ci_role_work(struct work_struct *work)
ci_role_stop(ci);
ci_role_start(ci, role);
}
}
/**
* ci_otg_work - perform otg (vbus/id) event handle
* @work: work struct
*/
static void ci_otg_work(struct work_struct *work)
{
struct ci_hdrc *ci = container_of(work, struct ci_hdrc, work);
if (ci->id_event) {
ci->id_event = false;
ci_handle_id_switch(ci);
} else if (ci->b_sess_valid_event) {
ci->b_sess_valid_event = false;
ci_handle_vbus_change(ci);
} else
dev_err(ci->dev, "unexpected event occurs at %s\n", __func__);
enable_irq(ci->irq);
}
/**
* ci_hdrc_otg_init - initialize otg struct
* ci: the controller
*/
int ci_hdrc_otg_init(struct ci_hdrc *ci)
{
INIT_WORK(&ci->work, ci_role_work);
INIT_WORK(&ci->work, ci_otg_work);
ci->wq = create_singlethread_workqueue("ci_otg");
if (!ci->wq) {
dev_err(ci->dev, "can't create workqueue\n");