// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/*
* hcd_ddma.c - DesignWare HS OTG Controller descriptor DMA routines
*
* Copyright (C) 2004-2013 Synopsys, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the above-listed copyright holders may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any
* later version.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This file contains the Descriptor DMA implementation for Host mode
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/ch11.h>
#include "core.h"
#include "hcd.h"
static u16 dwc2_frame_list_idx(u16 frame)
{
return frame & (FRLISTEN_64_SIZE - 1);
}
static u16 dwc2_desclist_idx_inc(u16 idx, u16 inc, u8 speed)
{
return (idx + inc) &
((speed == USB_SPEED_HIGH ? MAX_DMA_DESC_NUM_HS_ISOC :
MAX_DMA_DESC_NUM_GENERIC) - 1);
}
static u16 dwc2_desclist_idx_dec(u16 idx, u16 inc, u8 speed)
{
return (idx - inc) &
((speed == USB_SPEED_HIGH ? MAX_DMA_DESC_NUM_HS_ISOC :
MAX_DMA_DESC_NUM_GENERIC) - 1);
}
static u16 dwc2_max_desc_num(struct dwc2_qh *qh)
{
return (qh->ep_type == USB_ENDPOINT_XFER_ISOC &&
qh->dev_speed == USB_SPEED_HIGH) ?
MAX_DMA_DESC_NUM_HS_ISOC : MAX_DMA_DESC_NUM_GENERIC;
}
static u16 dwc2_frame_incr_val(struct dwc2_qh