From 8709115180c612bd8e6686a7b6c6fe94e5b51cdc Mon Sep 17 00:00:00 2001 From: Michael Grzeschik Date: Thu, 16 Jun 2022 21:44:59 +0200 Subject: [PATCH] usb: chipidea: udc: implement get_frame 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 Signed-off-by: Michael Grzeschik Link: https://lore.kernel.org/r/20220616194459.2981519-1-m.grzeschik@pengutronix.de Signed-off-by: Greg Kroah-Hartman --- drivers/usb/chipidea/ci.h | 1 + drivers/usb/chipidea/core.c | 2 ++ drivers/usb/chipidea/udc.c | 14 ++++++++++++++ 3 files changed, 17 insertions(+) diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h index 99440ba..a4a3be0 100644 --- a/drivers/usb/chipidea/ci.h +++ b/drivers/usb/chipidea/ci.h @@ -49,6 +49,7 @@ enum ci_hw_regs { OP_USBCMD, OP_USBSTS, OP_USBINTR, + OP_FRINDEX, OP_DEVICEADDR, OP_ENDPTLISTADDR, OP_TTCTRL, diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 5359b2a..6330fa9 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -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, diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index dc6c96e..0c9ae97 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -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, -- 2.7.4