From: Wesley Cheng <wcheng@codeaurora.org>
To: robh+dt@kernel.org, bjorn.andersson@linaro.org, balbi@kernel.org,
gregkh@linuxfoundation.org, agross@kernel.org
Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
devicetree@vger.kernel.org, linux-usb@vger.kernel.org,
jackp@codeaurora.org, Wesley Cheng <wcheng@codeaurora.org>
Subject: [RFC v5 5/6] usb: gadget: udc: core: Introduce check_config to verify USB configuration
Date: Fri, 28 Aug 2020 22:58:45 -0700 [thread overview]
Message-ID: <20200829055846.19034-6-wcheng@codeaurora.org> (raw)
In-Reply-To: <20200829055846.19034-1-wcheng@codeaurora.org>
Some UDCs may have constraints on how many high bandwidth endpoints it can
support in a certain configuration. This API allows for the composite
driver to pass down the total number of endpoints to the UDC so it can verify
it has the required resources to support the configuration.
Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
---
drivers/usb/gadget/udc/core.c | 9 +++++++++
include/linux/usb/gadget.h | 2 ++
2 files changed, 11 insertions(+)
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index c33ad8a333ad..e006d69dff9b 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1001,6 +1001,15 @@ int usb_gadget_ep_match_desc(struct usb_gadget *gadget,
}
EXPORT_SYMBOL_GPL(usb_gadget_ep_match_desc);
+int usb_gadget_check_config(struct usb_gadget *gadget, unsigned long ep_map)
+{
+ if (!gadget->ops->check_config)
+ return 0;
+
+ return gadget->ops->check_config(gadget, ep_map);
+}
+EXPORT_SYMBOL_GPL(usb_gadget_check_config);
+
/* ------------------------------------------------------------------------- */
static void usb_gadget_state_work(struct work_struct *work)
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 52ce1f6b8f83..791ae5b352a1 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -326,6 +326,7 @@ struct usb_gadget_ops {
struct usb_ep *(*match_ep)(struct usb_gadget *,
struct usb_endpoint_descriptor *,
struct usb_ss_ep_comp_descriptor *);
+ int (*check_config)(struct usb_gadget *gadget, unsigned long ep_map);
};
/**
@@ -575,6 +576,7 @@ int usb_gadget_connect(struct usb_gadget *gadget);
int usb_gadget_disconnect(struct usb_gadget *gadget);
int usb_gadget_deactivate(struct usb_gadget *gadget);
int usb_gadget_activate(struct usb_gadget *gadget);
+int usb_gadget_check_config(struct usb_gadget *gadget, unsigned long ep_map);
#else
static inline int usb_gadget_frame_number(struct usb_gadget *gadget)
{ return 0; }
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2020-08-29 5:59 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-29 5:58 [RFC v5 0/6] Re-introduce TX FIFO resize for larger EP bursting Wesley Cheng
2020-08-29 5:58 ` [RFC v5 1/6] usb: dwc3: Resize TX FIFOs to meet EP bursting requirements Wesley Cheng
2020-08-29 5:58 ` [RFC v5 2/6] arm64: boot: dts: qcom: sm8150: Enable dynamic TX FIFO resize logic Wesley Cheng
2020-08-29 5:58 ` [RFC v5 3/6] dt-bindings: usb: dwc3: Add entry for tx-fifo-resize Wesley Cheng
2020-08-29 5:58 ` [RFC v5 4/6] usb: gadget: configfs: Check USB configuration before adding Wesley Cheng
2020-08-31 2:29 ` Peter Chen
2020-08-31 7:34 ` Wesley Cheng
2020-08-29 5:58 ` Wesley Cheng [this message]
2020-08-29 5:58 ` [RFC v5 6/6] usb: dwc3: gadget: Ensure enough TXFIFO space for USB configuration Wesley Cheng
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