usb: ohci: Add support for interrupt queues

Add support for interrupt queues to the ohci hcd code, bringing it inline
with the ehci and musb-new(host) code.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Marek Vasut <marex@denx.de>

diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 17f3ac66be21bf252e371f73cce1bb0aff7db2e7..691ed1c900b837c7c61fa40dc2882add81942b45 100644 (file)
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -1622,6 +1622,91 @@ static int submit_common_msg(ohci_t *ohci, struct usb_device *dev,
        return 0;
 }
 
+#define MAX_INT_QUEUESIZE 8
+
+struct int_queue {
+       int queuesize;
+       int curr_urb;
+       urb_priv_t *urb[MAX_INT_QUEUESIZE];
+};
+
+static struct int_queue *_ohci_create_int_queue(ohci_t *ohci,
+               struct usb_device *udev, unsigned long pipe, int queuesize,
+               int elementsize, void *buffer, int interval)
+{
+       struct int_queue *queue;
+       ohci_dev_t *ohci_dev;
+       int i;
+
+       if (queuesize > MAX_INT_QUEUESIZE)
+               return NULL;
+
+       ohci_dev = ohci_get_ohci_dev(ohci, udev->devnum, 1);
+       if (!ohci_dev)
+               return NULL;
+
+       queue = malloc(sizeof(*queue));
+       if (!queue) {
+               printf("ohci: Error out of memory allocating int queue\n");
+               return NULL;
+       }
+
+       for (i = 0; i < queuesize; i++) {
+               queue->urb[i] = ohci_alloc_urb(udev, pipe,
+                                              buffer + i * elementsize,
+                                              elementsize, interval);
+               if (!queue->urb[i])
+                       break;
+
+               if (sohci_submit_job(ohci, ohci_dev, queue->urb[i], NULL)) {
+                       printf("ohci: Error submitting int queue job\n");
+                       urb_free_priv(queue->urb[i]);
+                       break;
+               }
+       }
+       if (i == 0) {
+               /* We did not succeed in submitting even 1 urb */
+               free(queue);
+               return NULL;
+       }
+
+       queue->queuesize = i;
+       queue->curr_urb = 0;
+
+       return queue;
+}
+
+static void *_ohci_poll_int_queue(ohci_t *ohci, struct usb_device *udev,
+                                 struct int_queue *queue)
+{
+       if (queue->curr_urb == queue->queuesize)
+               return NULL; /* Queue depleted */
+
+       if (hc_interrupt(ohci) < 0)
+               return NULL;
+
+       if (queue->urb[queue->curr_urb]->finished) {
+               void *ret = queue->urb[queue->curr_urb]->transfer_buffer;
+               queue->curr_urb++;
+               return ret;
+       }
+
+       return NULL;
+}
+
+static int _ohci_destroy_int_queue(ohci_t *ohci, struct usb_device *dev,
+                                  struct int_queue *queue)
+{
+       int i;
+
+       for (i = 0; i < queue->queuesize; i++)
+               urb_free_priv(queue->urb[i]);
+
+       free(queue);
+
+       return 0;
+}
+
 #ifndef CONFIG_DM_USB
 /* submit routines called from usb.c */
 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
@@ -1639,6 +1724,24 @@ int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
        return submit_common_msg(&gohci, dev, pipe, buffer, transfer_len, NULL,
                        interval);
 }
+
+struct int_queue *create_int_queue(struct usb_device *dev,
+               unsigned long pipe, int queuesize, int elementsize,
+               void *buffer, int interval)
+{
+       return _ohci_create_int_queue(&gohci, dev, pipe, queuesize,
+                                     elementsize, buffer, interval);
+}
+
+void *poll_int_queue(struct usb_device *dev, struct int_queue *queue)
+{
+       return _ohci_poll_int_queue(&gohci, dev, queue);
+}
+
+int destroy_int_queue(struct usb_device *dev, struct int_queue *queue)
+{
+       return _ohci_destroy_int_queue(&gohci, dev, queue);
+}
 #endif
 
 static int _ohci_submit_control_msg(ohci_t *ohci, struct usb_device *dev,
@@ -2072,6 +2175,32 @@ static int ohci_submit_int_msg(struct udevice *dev, struct usb_device *udev,
                                 NULL, interval);
 }
 
+static struct int_queue *ohci_create_int_queue(struct udevice *dev,
+               struct usb_device *udev, unsigned long pipe, int queuesize,
+               int elementsize, void *buffer, int interval)
+{
+       ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
+
+       return _ohci_create_int_queue(ohci, udev, pipe, queuesize, elementsize,
+                                     buffer, interval);
+}
+
+static void *ohci_poll_int_queue(struct udevice *dev, struct usb_device *udev,
+                                struct int_queue *queue)
+{
+       ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
+
+       return _ohci_poll_int_queue(ohci, udev, queue);
+}
+
+static int ohci_destroy_int_queue(struct udevice *dev, struct usb_device *udev,
+                                 struct int_queue *queue)
+{
+       ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
+
+       return _ohci_destroy_int_queue(ohci, udev, queue);
+}
+
 int ohci_register(struct udevice *dev, struct ohci_regs *regs)
 {
        struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
@@ -2114,6 +2243,9 @@ struct dm_usb_ops ohci_usb_ops = {
        .control = ohci_submit_control_msg,
        .bulk = ohci_submit_bulk_msg,
        .interrupt = ohci_submit_int_msg,
+       .create_int_queue = ohci_create_int_queue,
+       .poll_int_queue = ohci_poll_int_queue,
+       .destroy_int_queue = ohci_destroy_int_queue,
 };
 
 #endif