diff options
author | Ingo Molnar <mingo@elte.hu> | 2009-03-05 12:47:28 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-03-05 12:47:28 +0100 |
commit | 7df4edb07cf54a4868b9a750424c0d2aa68f8d66 (patch) | |
tree | 0ad0ad3f3dcb6f9edf26dde42ba625053dddf54f /drivers/usb/host/fhci-mem.c | |
parent | 0d688da5505d77bcef2441e0a22d8cc26459702d (diff) | |
parent | 559595a985e106d2fa9f0c79b7f5805453fed593 (diff) |
Merge branch 'linus' into core/iommu
Diffstat (limited to 'drivers/usb/host/fhci-mem.c')
-rw-r--r-- | drivers/usb/host/fhci-mem.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/drivers/usb/host/fhci-mem.c b/drivers/usb/host/fhci-mem.c new file mode 100644 index 00000000000..2c0736c9971 --- /dev/null +++ b/drivers/usb/host/fhci-mem.c @@ -0,0 +1,113 @@ +/* + * 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/list.h> +#include <linux/usb.h> +#include "../core/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; +} |