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dm: usb: sandbox: Add a uclass for USB device emulation

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With sandbox we want to be able to emulate USB devices so that we can test
the USB stack. Add a uclass to support this. It implements the same
operations as a normal USB device driver, but in this case passes them on
to an emulation driver.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Simon Glass
2015-03-25 12:22:37 -06:00
parent f84c052a3e
commit 019808f97c
7 changed files with 346 additions and 1 deletions
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64
include/usb.h
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@ -179,7 +179,8 @@ enum usb_init_type {
defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X) || \
defined(CONFIG_USB_MUSB_DSPS) || defined(CONFIG_USB_MUSB_AM35X) || \
defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined(CONFIG_USB_MUSB_SUNXI) || \
defined(CONFIG_USB_XHCI) || defined(CONFIG_USB_DWC2)
defined(CONFIG_USB_XHCI) || defined(CONFIG_USB_DWC2) || \
defined(CONFIG_USB_EMUL)
int usb_lowlevel_init(int index, enum usb_init_type init, void **controller);
int usb_lowlevel_stop(int index);
@ -848,4 +849,65 @@ int usb_new_device(struct usb_device *dev);
int usb_alloc_device(struct usb_device *dev);
/**
* usb_emul_setup_device() - Set up a new USB device emulation
*
* This is normally called when a new emulation device is bound. It tells
* the USB emulation uclass about the features of the emulator.
*
* @dev: Emulation device
* @maxpacketsize: Maximum packet size (e.g. PACKET_SIZE_64)
* @strings: List of USB string descriptors, terminated by a NULL
* entry
* @desc_list: List of points or USB descriptors, terminated by NULL.
* The first entry must be struct usb_device_descriptor,
* and others follow on after that.
* @return 0 if OK, -ve on error
*/
int usb_emul_setup_device(struct udevice *dev, int maxpacketsize,
struct usb_string *strings, void **desc_list);
/**
* usb_emul_control() - Send a control packet to an emulator
*
* @emul: Emulator device
* @udev: USB device (which the emulator is causing to appear)
* See struct dm_usb_ops for details on other parameters
* @return 0 if OK, -ve on error
*/
int usb_emul_control(struct udevice *emul, struct usb_device *udev,
unsigned long pipe, void *buffer, int length,
struct devrequest *setup);
/**
* usb_emul_bulk() - Send a bulk packet to an emulator
*
* @emul: Emulator device
* @udev: USB device (which the emulator is causing to appear)
* See struct dm_usb_ops for details on other parameters
* @return 0 if OK, -ve on error
*/
int usb_emul_bulk(struct udevice *emul, struct usb_device *udev,
unsigned long pipe, void *buffer, int length);
/**
* usb_emul_find() - Find an emulator for a particular device
*
* Check @pipe to find a device number on bus @bus and return it.
*
* @bus: USB bus (controller)
* @pipe: Describes pipe being used, and includes the device number
* @emulp: Returns pointer to emulator, or NULL if not found
* @return 0 if found, -ve on error
*/
int usb_emul_find(struct udevice *bus, ulong pipe, struct udevice **emulp);
/**
* usb_emul_reset() - Reset all emulators ready for use
*
* Clear out any address information in the emulators and make then ready for
* a new USB scan
*/
void usb_emul_reset(struct udevice *dev);
#endif /*_USB_H_ */