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b2d2b78722
Move urb code from musb only use to a more common scope, so other drivers in the future can use the handling of urb in usb. Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
160 lines
4.2 KiB
C
160 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Common code for usb urb handling, based on the musb-new code
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*
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* Copyright 2021 Linaro, Rui Miguel Silva <rui.silva@linaro.org>
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*
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*/
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#include <dm/device.h>
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#include <dm/device_compat.h>
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#include <linux/usb/usb_urb_compat.h>
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#include <time.h>
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#include <usb.h>
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#if CONFIG_IS_ENABLED(DM_USB)
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struct usb_device *usb_dev_get_parent(struct usb_device *udev)
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{
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struct udevice *parent = udev->dev->parent;
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/*
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* When called from usb-uclass.c: usb_scan_device() udev->dev points
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* to the parent udevice, not the actual udevice belonging to the
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* udev as the device is not instantiated yet.
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*
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* If dev is an usb-bus, then we are called from usb_scan_device() for
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* an usb-device plugged directly into the root port, return NULL.
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*/
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if (device_get_uclass_id(udev->dev) == UCLASS_USB)
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return NULL;
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/*
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* If these 2 are not the same we are being called from
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* usb_scan_device() and udev itself is the parent.
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*/
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if (dev_get_parent_priv(udev->dev) != udev)
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return udev;
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/* We are being called normally, use the parent pointer */
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if (device_get_uclass_id(parent) == UCLASS_USB_HUB)
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return dev_get_parent_priv(parent);
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return NULL;
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}
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#else
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struct usb_device *usb_dev_get_parent(struct usb_device *udev)
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{
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return udev->parent;
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}
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#endif
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static void usb_urb_complete(struct urb *urb)
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{
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urb->dev->status &= ~USB_ST_NOT_PROC;
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urb->dev->act_len = urb->actual_length;
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if (urb->status == -EINPROGRESS)
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urb->status = 0;
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}
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void usb_urb_fill(struct urb *urb, struct usb_host_endpoint *hep,
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struct usb_device *dev, int endpoint_type,
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unsigned long pipe, void *buffer, int len,
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struct devrequest *setup, int interval)
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{
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int epnum = usb_pipeendpoint(pipe);
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int is_in = usb_pipein(pipe);
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u16 maxpacketsize = is_in ? dev->epmaxpacketin[epnum] :
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dev->epmaxpacketout[epnum];
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memset(urb, 0, sizeof(struct urb));
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memset(hep, 0, sizeof(struct usb_host_endpoint));
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INIT_LIST_HEAD(&hep->urb_list);
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INIT_LIST_HEAD(&urb->urb_list);
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urb->ep = hep;
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urb->complete = usb_urb_complete;
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urb->status = -EINPROGRESS;
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urb->dev = dev;
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urb->pipe = pipe;
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urb->transfer_buffer = buffer;
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urb->transfer_dma = (unsigned long)buffer;
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urb->transfer_buffer_length = len;
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urb->setup_packet = (unsigned char *)setup;
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urb->ep->desc.wMaxPacketSize = __cpu_to_le16(maxpacketsize);
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urb->ep->desc.bmAttributes = endpoint_type;
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urb->ep->desc.bEndpointAddress = ((is_in ? USB_DIR_IN : USB_DIR_OUT) |
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epnum);
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urb->ep->desc.bInterval = interval;
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}
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int usb_urb_submit(struct usb_hcd *hcd, struct urb *urb)
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{
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const struct usb_urb_ops *ops = hcd->urb_ops;
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unsigned long timeout;
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int ret;
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if (!ops)
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return -EINVAL;
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ret = ops->urb_enqueue(hcd, urb, 0);
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if (ret < 0) {
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printf("Failed to enqueue URB to controller\n");
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return ret;
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}
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timeout = get_timer(0) + USB_TIMEOUT_MS(urb->pipe);
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do {
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if (ctrlc())
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return -EIO;
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ops->isr(0, hcd);
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} while (urb->status == -EINPROGRESS && get_timer(0) < timeout);
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if (urb->status == -EINPROGRESS)
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ops->urb_dequeue(hcd, urb, -ETIME);
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return urb->status;
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}
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int usb_urb_submit_control(struct usb_hcd *hcd, struct urb *urb,
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struct usb_host_endpoint *hep,
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struct usb_device *dev, unsigned long pipe,
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void *buffer, int len, struct devrequest *setup,
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int interval, enum usb_device_speed speed)
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{
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const struct usb_urb_ops *ops = hcd->urb_ops;
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usb_urb_fill(urb, hep, dev, USB_ENDPOINT_XFER_CONTROL, pipe, buffer,
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len, setup, 0);
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/* Fix speed for non hub-attached devices */
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if (!usb_dev_get_parent(dev)) {
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dev->speed = speed;
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if (ops->hub_control)
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return ops->hub_control(hcd, dev, pipe, buffer, len,
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setup);
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}
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return usb_urb_submit(hcd, urb);
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}
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int usb_urb_submit_bulk(struct usb_hcd *hcd, struct urb *urb,
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struct usb_host_endpoint *hep, struct usb_device *dev,
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unsigned long pipe, void *buffer, int len)
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{
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usb_urb_fill(urb, hep, dev, USB_ENDPOINT_XFER_BULK, pipe, buffer, len,
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NULL, 0);
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return usb_urb_submit(hcd, urb);
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}
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int usb_urb_submit_irq(struct usb_hcd *hcd, struct urb *urb,
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struct usb_host_endpoint *hep, struct usb_device *dev,
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unsigned long pipe, void *buffer, int len, int interval)
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{
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usb_urb_fill(urb, hep, dev, USB_ENDPOINT_XFER_INT, pipe, buffer, len,
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NULL, interval);
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return usb_urb_submit(hcd, urb);
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}
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