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usb: chipidea: udc: implement get_frame

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The chipidea udc core is capable of reading the current frame index from
hardware. This patch adds the get_frame callback to the driver.

Acked-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Link: https://lore.kernel.org/r/20220616194459.2981519-1-m.grzeschik@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Grzeschik 2022-06-16 21:44:59 +02:00 • committed by Greg Kroah-Hartman
parent 5c586db846
commit 8709115180
3 changed files with 17 additions and 0 deletions
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1
drivers/usb/chipidea/ci.h
View file

@ -49,6 +49,7 @@ enum ci_hw_regs {
OP_USBCMD,
OP_USBSTS,
OP_USBINTR,
OP_FRINDEX,
OP_DEVICEADDR,
OP_ENDPTLISTADDR,
OP_TTCTRL,

2
drivers/usb/chipidea/core.c
View file

@ -53,6 +53,7 @@ static const u8 ci_regs_nolpm[] = {
[OP_USBCMD] = 0x00U,
[OP_USBSTS] = 0x04U,
[OP_USBINTR] = 0x08U,
[OP_FRINDEX] = 0x0CU,
[OP_DEVICEADDR] = 0x14U,
[OP_ENDPTLISTADDR] = 0x18U,
[OP_TTCTRL] = 0x1CU,
@ -78,6 +79,7 @@ static const u8 ci_regs_lpm[] = {
[OP_USBCMD] = 0x00U,
[OP_USBSTS] = 0x04U,
[OP_USBINTR] = 0x08U,
[OP_FRINDEX] = 0x0CU,
[OP_DEVICEADDR] = 0x14U,
[OP_ENDPTLISTADDR] = 0x18U,
[OP_TTCTRL] = 0x1CU,

14
drivers/usb/chipidea/udc.c
View file

@ -1651,6 +1651,19 @@ static const struct usb_ep_ops usb_ep_ops = {
/******************************************************************************
* GADGET block
*****************************************************************************/
static int ci_udc_get_frame(struct usb_gadget *_gadget)
{
struct ci_hdrc *ci = container_of(_gadget, struct ci_hdrc, gadget);
unsigned long flags;
int ret;
spin_lock_irqsave(&ci->lock, flags);
ret = hw_read(ci, OP_FRINDEX, 0x3fff);
spin_unlock_irqrestore(&ci->lock, flags);
return ret >> 3;
}
/*
* ci_hdrc_gadget_connect: caller makes sure gadget driver is binded
*/
@ -1807,6 +1820,7 @@ static struct usb_ep *ci_udc_match_ep(struct usb_gadget *gadget,
* Check "usb_gadget.h" for details
*/
static const struct usb_gadget_ops usb_gadget_ops = {
.get_frame = ci_udc_get_frame,
.vbus_session = ci_udc_vbus_session,
.wakeup = ci_udc_wakeup,
.set_selfpowered = ci_udc_selfpowered,