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musb-new: Add interrupt queue support

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Add interrupt queue support, so that a usb keyboard can be used without
causing huge latencies.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Hans de Goede 2015-01-11 20:34:54 +01:00 committed by Marek Vasut
parent accf04c2aa
commit 904f2a83a8
2 changed files with 67 additions and 1 deletions
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65
drivers/usb/musb-new/musb_uboot.c
View file

@ -12,6 +12,11 @@
#include "musb_gadget.h"
#ifdef CONFIG_MUSB_HOST
struct int_queue {
struct usb_host_endpoint hep;
struct urb urb;
};
static struct musb *host;
static struct usb_hcd hcd;
static enum usb_device_speed host_speed;
@ -112,6 +117,66 @@ int submit_int_msg(struct usb_device *dev, unsigned long pipe,
return submit_urb(&hcd, &urb);
}
struct int_queue *create_int_queue(struct usb_device *dev, unsigned long pipe,
int queuesize, int elementsize, void *buffer, int interval)
{
struct int_queue *queue;
int ret, index = usb_pipein(pipe) * 16 + usb_pipeendpoint(pipe);
if (queuesize != 1) {
printf("ERROR musb int-queues only support queuesize 1\n");
return NULL;
}
if (dev->int_pending & (1 << index)) {
printf("ERROR int-urb is already pending on pipe %lx\n", pipe);
return NULL;
}
queue = malloc(sizeof(*queue));
if (!queue)
return NULL;
construct_urb(&queue->urb, &queue->hep, dev, USB_ENDPOINT_XFER_INT,
pipe, buffer, elementsize, NULL, interval);
ret = musb_urb_enqueue(&hcd, &queue->urb, 0);
if (ret < 0) {
printf("Failed to enqueue URB to controller\n");
free(queue);
return NULL;
}
dev->int_pending |= 1 << index;
return queue;
}
int destroy_int_queue(struct usb_device *dev, struct int_queue *queue)
{
int index = usb_pipein(queue->urb.pipe) * 16 +
usb_pipeendpoint(queue->urb.pipe);
if (queue->urb.status == -EINPROGRESS)
musb_urb_dequeue(&hcd, &queue->urb, -ETIME);
dev->int_pending &= ~(1 << index);
free(queue);
return 0;
}
void *poll_int_queue(struct usb_device *dev, struct int_queue *queue)
{
if (queue->urb.status != -EINPROGRESS)
return NULL; /* URB has already completed in a prev. poll */
host->isr(0, host);
if (queue->urb.status != -EINPROGRESS)
return queue->urb.transfer_buffer; /* Done */
return NULL; /* URB still pending */
}
void usb_reset_root_port(void)
{
void *mbase = host->mregs;

3
include/usb.h
View file

@ -120,6 +120,7 @@ struct usb_device {
* Each instance needs its own set of data structures.
*/
unsigned long status;
unsigned long int_pending; /* 1 bit per ep, used by int_queue */
int act_len; /* transfered bytes */
int maxchild; /* Number of ports if hub */
int portnr;
@ -172,7 +173,7 @@ 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);
#ifdef CONFIG_USB_EHCI /* Only the ehci code has pollable int support */
#if defined CONFIG_USB_EHCI || defined CONFIG_MUSB_HOST
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);