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usb: common: move urb code to common

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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>
This commit is contained in:
Rui Miguel Silva 2022-06-29 11:06:14 +01:00 • committed by Marek Vasut
parent b252d79b09
commit b2d2b78722
10 changed files with 242 additions and 76 deletions
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114
include/linux/usb/usb_urb_compat.h Normal file
View file

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