From 8a5f0665da6701f06443ae989e9c0962807a1249 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sun, 10 May 2015 14:10:18 +0200 Subject: dm: usb: Add support for interrupt queues to the dm usb code Interrupt endpoints typically are polled for a long time by the usb controller before they return anything, so calls to submit_int_msg() can take a long time to complete this. To avoid this the u-boot code has the an interrupt queue mechanism / API, add support for this to the driver-model usb code and implement it for the dm ehci code. See the added doc comments for more details. Signed-off-by: Hans de Goede Acked-by: Simon Glass --- include/usb.h | 48 +++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 47 insertions(+), 1 deletion(-) (limited to 'include/usb.h') diff --git a/include/usb.h b/include/usb.h index 4c21050..609b13d 100644 --- a/include/usb.h +++ b/include/usb.h @@ -198,7 +198,7 @@ int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer, int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer, int transfer_len, int interval); -#if defined CONFIG_USB_EHCI || defined CONFIG_MUSB_HOST +#if defined CONFIG_USB_EHCI || defined CONFIG_MUSB_HOST || defined(CONFIG_DM_USB) struct int_queue *create_int_queue(struct usb_device *dev, unsigned long pipe, int queuesize, int elementsize, void *buffer, int interval); int destroy_int_queue(struct usb_device *dev, struct int_queue *queue); @@ -660,6 +660,52 @@ struct dm_usb_ops { int (*interrupt)(struct udevice *bus, struct usb_device *udev, unsigned long pipe, void *buffer, int length, int interval); + + /** + * create_int_queue() - Create and queue interrupt packets + * + * Create and queue @queuesize number of interrupt usb packets of + * @elementsize bytes each. @buffer must be atleast @queuesize * + * @elementsize bytes. + * + * Note some controllers only support a queuesize of 1. + * + * @interval: Interrupt interval + * + * @return A pointer to the created interrupt queue or NULL on error + */ + struct int_queue * (*create_int_queue)(struct udevice *bus, + struct usb_device *udev, unsigned long pipe, + int queuesize, int elementsize, void *buffer, + int interval); + + /** + * poll_int_queue() - Poll an interrupt queue for completed packets + * + * Poll an interrupt queue for completed packets. The return value + * points to the part of the buffer passed to create_int_queue() + * corresponding to the completed packet. + * + * @queue: queue to poll + * + * @return Pointer to the data of the first completed packet, or + * NULL if no packets are ready + */ + void * (*poll_int_queue)(struct udevice *bus, struct usb_device *udev, + struct int_queue *queue); + + /** + * destroy_int_queue() - Destroy an interrupt queue + * + * Destroy an interrupt queue created by create_int_queue(). + * + * @queue: queue to poll + * + * @return 0 if OK, -ve on error + */ + int (*destroy_int_queue)(struct udevice *bus, struct usb_device *udev, + struct int_queue *queue); + /** * alloc_device() - Allocate a new device context (XHCI) * -- cgit v1.1