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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>
115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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#ifndef __USB_URB_COMPAT_H__
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#define __USB_URB_COMPAT_H__
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#include <linux/compat.h>
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#include <usb.h>
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struct udevice;
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struct urb;
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struct usb_hcd;
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struct usb_urb_ops {
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int (*urb_enqueue)(struct usb_hcd *hcd, struct urb *urb,
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gfp_t mem_flags);
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int (*urb_dequeue)(struct usb_hcd *hcd, struct urb *urb, int status);
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int (*hub_control)(struct usb_hcd *hcd, struct usb_device *dev,
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unsigned long pipe, void *buffer, int len,
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struct devrequest *setup);
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irqreturn_t (*isr)(int irq, void *priv);
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};
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struct usb_hcd {
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void *hcd_priv;
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const struct usb_urb_ops *urb_ops;
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};
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struct usb_host_endpoint {
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struct usb_endpoint_descriptor desc;
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struct list_head urb_list;
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void *hcpriv;
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};
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/*
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* urb->transfer_flags:
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*
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* Note: URB_DIR_IN/OUT is automatically set in usb_submit_urb().
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*/
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#define URB_SHORT_NOT_OK 0x0001 /* report short reads as errors */
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#define URB_ZERO_PACKET 0x0040 /* Finish bulk OUT with short packet */
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typedef void (*usb_complete_t)(struct urb *);
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struct urb {
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void *hcpriv; /* private data for host controller */
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struct list_head urb_list; /* list head for use by the urb's
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* current owner */
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struct usb_device *dev; /* (in) pointer to associated device */
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struct usb_host_endpoint *ep; /* (internal) pointer to endpoint */
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unsigned int pipe; /* (in) pipe information */
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int status; /* (return) non-ISO status */
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unsigned int transfer_flags; /* (in) URB_SHORT_NOT_OK | ...*/
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void *transfer_buffer; /* (in) associated data buffer */
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dma_addr_t transfer_dma; /* (in) dma addr for transfer_buffer */
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u32 transfer_buffer_length; /* (in) data buffer length */
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u32 actual_length; /* (return) actual transfer length */
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unsigned char *setup_packet; /* (in) setup packet (control only) */
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int start_frame; /* (modify) start frame (ISO) */
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usb_complete_t complete; /* (in) completion routine */
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};
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#define usb_hcd_link_urb_to_ep(hcd, urb) ({ \
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int ret = 0; \
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list_add_tail(&urb->urb_list, &urb->ep->urb_list); \
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ret; })
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#define usb_hcd_unlink_urb_from_ep(hcd, urb) list_del_init(&urb->urb_list)
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#define usb_hcd_check_unlink_urb(hdc, urb, status) 0
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static inline void usb_hcd_giveback_urb(struct usb_hcd *hcd,
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struct urb *urb,
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int status)
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{
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urb->status = status;
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if (urb->complete)
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urb->complete(urb);
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}
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static inline int usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd,
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struct urb *urb)
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{
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/* TODO: add cache invalidation here */
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return 0;
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}
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/**
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* usb_dev_get_parent() - Get the parent of a USB device
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*
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* @udev: USB struct containing information about the device
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* Return: associated device for which udev == dev_get_parent_priv(dev)
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*/
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struct usb_device *usb_dev_get_parent(struct usb_device *udev);
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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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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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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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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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int usb_urb_submit(struct usb_hcd *hcd, struct urb *urb);
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#endif /* __USB_COMPAT_H__ */
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