Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / usb / host / fhci-mem.c

diff --git a/kernel/drivers/usb/host/fhci-mem.c b/kernel/drivers/usb/host/fhci-mem.c
new file mode 100644 (file)
index 0000000..b0b88f5
--- /dev/null
+++ b/kernel/drivers/usb/host/fhci-mem.c
@@ -0,0 +1,114 @@
+/*
+ * Freescale QUICC Engine USB Host Controller Driver
+ *
+ * Copyright (c) Freescale Semicondutor, Inc. 2006.
+ *               Shlomi Gridish <gridish@freescale.com>
+ *               Jerry Huang <Chang-Ming.Huang@freescale.com>
+ * Copyright (c) Logic Product Development, Inc. 2007
+ *               Peter Barada <peterb@logicpd.com>
+ * Copyright (c) MontaVista Software, Inc. 2008.
+ *               Anton Vorontsov <avorontsov@ru.mvista.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include "fhci.h"
+
+static void init_td(struct td *td)
+{
+       memset(td, 0, sizeof(*td));
+       INIT_LIST_HEAD(&td->node);
+       INIT_LIST_HEAD(&td->frame_lh);
+}
+
+static void init_ed(struct ed *ed)
+{
+       memset(ed, 0, sizeof(*ed));
+       INIT_LIST_HEAD(&ed->td_list);
+       INIT_LIST_HEAD(&ed->node);
+}
+
+static struct td *get_empty_td(struct fhci_hcd *fhci)
+{
+       struct td *td;
+
+       if (!list_empty(&fhci->empty_tds)) {
+               td = list_entry(fhci->empty_tds.next, struct td, node);
+               list_del(fhci->empty_tds.next);
+       } else {
+               td = kmalloc(sizeof(*td), GFP_ATOMIC);
+               if (!td)
+                       fhci_err(fhci, "No memory to allocate to TD\n");
+               else
+                       init_td(td);
+       }
+
+       return td;
+}
+
+void fhci_recycle_empty_td(struct fhci_hcd *fhci, struct td *td)
+{
+       init_td(td);
+       list_add(&td->node, &fhci->empty_tds);
+}
+
+struct ed *fhci_get_empty_ed(struct fhci_hcd *fhci)
+{
+       struct ed *ed;
+
+       if (!list_empty(&fhci->empty_eds)) {
+               ed = list_entry(fhci->empty_eds.next, struct ed, node);
+               list_del(fhci->empty_eds.next);
+       } else {
+               ed = kmalloc(sizeof(*ed), GFP_ATOMIC);
+               if (!ed)
+                       fhci_err(fhci, "No memory to allocate to ED\n");
+               else
+                       init_ed(ed);
+       }
+
+       return ed;
+}
+
+void fhci_recycle_empty_ed(struct fhci_hcd *fhci, struct ed *ed)
+{
+       init_ed(ed);
+       list_add(&ed->node, &fhci->empty_eds);
+}
+
+struct td *fhci_td_fill(struct fhci_hcd *fhci, struct urb *urb,
+                       struct urb_priv *urb_priv, struct ed *ed, u16 index,
+                       enum fhci_ta_type type, int toggle, u8 *data, u32 len,
+                       u16 interval, u16 start_frame, bool ioc)
+{
+       struct td *td = get_empty_td(fhci);
+
+       if (!td)
+               return NULL;
+
+       td->urb = urb;
+       td->ed = ed;
+       td->type = type;
+       td->toggle = toggle;
+       td->data = data;
+       td->len = len;
+       td->iso_index = index;
+       td->interval = interval;
+       td->start_frame = start_frame;
+       td->ioc = ioc;
+       td->status = USB_TD_OK;
+
+       urb_priv->tds[index] = td;
+
+       return td;
+}