diff options
Diffstat (limited to 'drivers/usb/common/usb_urb.c')
| -rw-r--r-- | drivers/usb/common/usb_urb.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/drivers/usb/common/usb_urb.c b/drivers/usb/common/usb_urb.c new file mode 100644 index 0000000000..be3b6b9f32 --- /dev/null +++ b/drivers/usb/common/usb_urb.c @@ -0,0 +1,160 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Common code for usb urb handling, based on the musb-new code + * + * Copyright 2021 Linaro, Rui Miguel Silva <rui.silva@linaro.org> + * + */ + +#include <dm/device.h> +#include <dm/device_compat.h> +#include <linux/usb/usb_urb_compat.h> + +#include <time.h> +#include <usb.h> + +#if CONFIG_IS_ENABLED(DM_USB) +struct usb_device *usb_dev_get_parent(struct usb_device *udev) +{ + struct udevice *parent = udev->dev->parent; + + /* + * When called from usb-uclass.c: usb_scan_device() udev->dev points + * to the parent udevice, not the actual udevice belonging to the + * udev as the device is not instantiated yet. + * + * If dev is an usb-bus, then we are called from usb_scan_device() for + * an usb-device plugged directly into the root port, return NULL. + */ + if (device_get_uclass_id(udev->dev) == UCLASS_USB) + return NULL; + + /* + * If these 2 are not the same we are being called from + * usb_scan_device() and udev itself is the parent. + */ + if (dev_get_parent_priv(udev->dev) != udev) + return udev; + + /* We are being called normally, use the parent pointer */ + if (device_get_uclass_id(parent) == UCLASS_USB_HUB) + return dev_get_parent_priv(parent); + + return NULL; +} +#else +struct usb_device *usb_dev_get_parent(struct usb_device *udev) +{ + return udev->parent; +} +#endif + +static void usb_urb_complete(struct urb *urb) +{ + urb->dev->status &= ~USB_ST_NOT_PROC; + urb->dev->act_len = urb->actual_length; + + if (urb->status == -EINPROGRESS) + urb->status = 0; +} + +void usb_urb_fill(struct urb *urb, struct usb_host_endpoint *hep, + struct usb_device *dev, int endpoint_type, + unsigned long pipe, void *buffer, int len, + struct devrequest *setup, int interval) +{ + int epnum = usb_pipeendpoint(pipe); + int is_in = usb_pipein(pipe); + u16 maxpacketsize = is_in ? dev->epmaxpacketin[epnum] : + dev->epmaxpacketout[epnum]; + + memset(urb, 0, sizeof(struct urb)); + memset(hep, 0, sizeof(struct usb_host_endpoint)); + INIT_LIST_HEAD(&hep->urb_list); + INIT_LIST_HEAD(&urb->urb_list); + urb->ep = hep; + urb->complete = usb_urb_complete; + urb->status = -EINPROGRESS; + urb->dev = dev; + urb->pipe = pipe; + urb->transfer_buffer = buffer; + urb->transfer_dma = (unsigned long)buffer; + urb->transfer_buffer_length = len; + urb->setup_packet = (unsigned char *)setup; + + urb->ep->desc.wMaxPacketSize = __cpu_to_le16(maxpacketsize); + urb->ep->desc.bmAttributes = endpoint_type; + urb->ep->desc.bEndpointAddress = ((is_in ? USB_DIR_IN : USB_DIR_OUT) | + epnum); + urb->ep->desc.bInterval = interval; +} + +int usb_urb_submit(struct usb_hcd *hcd, struct urb *urb) +{ + const struct usb_urb_ops *ops = hcd->urb_ops; + unsigned long timeout; + int ret; + + if (!ops) + return -EINVAL; + + ret = ops->urb_enqueue(hcd, urb, 0); + if (ret < 0) { + printf("Failed to enqueue URB to controller\n"); + return ret; + } + + timeout = get_timer(0) + USB_TIMEOUT_MS(urb->pipe); + do { + if (ctrlc()) + return -EIO; + ops->isr(0, hcd); + } while (urb->status == -EINPROGRESS && get_timer(0) < timeout); + + if (urb->status == -EINPROGRESS) + ops->urb_dequeue(hcd, urb, -ETIME); + + return urb->status; +} + +int usb_urb_submit_control(struct usb_hcd *hcd, struct urb *urb, + struct usb_host_endpoint *hep, + struct usb_device *dev, unsigned long pipe, + void *buffer, int len, struct devrequest *setup, + int interval, enum usb_device_speed speed) +{ + const struct usb_urb_ops *ops = hcd->urb_ops; + + usb_urb_fill(urb, hep, dev, USB_ENDPOINT_XFER_CONTROL, pipe, buffer, + len, setup, 0); + + /* Fix speed for non hub-attached devices */ + if (!usb_dev_get_parent(dev)) { + dev->speed = speed; + if (ops->hub_control) + return ops->hub_control(hcd, dev, pipe, buffer, len, + setup); + } + + return usb_urb_submit(hcd, urb); +} + +int usb_urb_submit_bulk(struct usb_hcd *hcd, struct urb *urb, + struct usb_host_endpoint *hep, struct usb_device *dev, + unsigned long pipe, void *buffer, int len) +{ + usb_urb_fill(urb, hep, dev, USB_ENDPOINT_XFER_BULK, pipe, buffer, len, + NULL, 0); + + return usb_urb_submit(hcd, urb); +} + +int usb_urb_submit_irq(struct usb_hcd *hcd, struct urb *urb, + struct usb_host_endpoint *hep, struct usb_device *dev, + unsigned long pipe, void *buffer, int len, int interval) +{ + usb_urb_fill(urb, hep, dev, USB_ENDPOINT_XFER_INT, pipe, buffer, len, + NULL, interval); + + return usb_urb_submit(hcd, urb); +} |