/*
* core.h - DesignWare HS OTG Controller common declarations
*
* 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.
*/
#ifndef __DWC2_CORE_H__
#define __DWC2_CORE_H__
#include <linux/phy/phy.h>
#include <linux/regulator/consumer.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
#include <linux/usb/phy.h>
#include "hw.h"
static inline u32 dwc2_readl(const void __iomem *addr)
{
u32 value = __raw_readl(addr);
/* In order to preserve endianness __raw_* operation is used. Therefore
* a barrier is needed to ensure IO access is not re-ordered across
* reads or writes
*/
mb();
return value;
}
static inline void dwc2_writel(u32 value, void __iomem *addr)
{
__raw_writel(value, addr);
/*
* In order to preserve endianness __raw_* operation is used. Therefore
* a barrier is needed to ensure IO access is not re-ordered across
* reads or writes
*/
mb();
#ifdef DWC2_LOG_WRITES
pr_info("INFO:: wrote %08x to %p\n", value, addr);
#endif
}
/* Maximum number of Endpoints/HostChannels */
#define MAX_EPS_CHANNELS 16
/* dwc2-hsotg declarations */
static const char * const dwc2_hsotg_supply_names[] = {
"vusb_d", /* digital USB supply, 1.2V */
"vusb_a", /* analog USB supply, 1.1V */
};
/*
* EP0_MPS_LIMIT
*
* Unfortunately there seems to be a limit of the amount of data that can
* be transferred by IN transactions on EP0. This is either 127 bytes or 3
* packets (which practically means 1 packet and 63 bytes of data) when the
* MPS is set to 64.
*
* This means if we are wanting to move >127 bytes of data, we need to
* split the transactions up, but just doing one packet at a time does
* not work (this may be an implicit DATA0 PID on first packet of the
* transaction) and doing 2 packets is outside the controller's limits.
*
* If we try to lower the MPS size for EP0, then no transfers work properly
* for EP0, and the system will fail basic enumeration. As no cause for this
* has currently been found, we cannot support any large IN transfers for
* EP0.
*/
#define EP0_MPS_LIMIT 64
struct dwc2_hsotg;
struct dwc2_hsotg_req;
/**
* struct dwc2_hsotg_ep - driver endpoint definition.
* @ep: The gadget layer representation of the endpoint.
* @name: The driver generated name for the endpoint.
* @queue: Queue of requests for this endpoint.
* @parent: Reference back to the parent device structure.
* @req: The current request that the endpoint is processing. This is
* used to indicate an request has been loaded onto the endpoint
* and has yet to be completed (maybe due to data move, or simply
* awaiting an ack from the core all the data has been completed).
* @debugfs: File entry for debugfs file for this endpoint.
* @lock: State lock to protect contents of endpoint.
* @dir_in: Set to true if this endpoint is of the IN direction, which
* means that it is sending data to the Host.
* @index: The index for the endpoint registers.
* @mc: Multi Count - number of transactions per microframe
* @interval - Interval for periodic endpoints
* @name: The name array passed to the USB core.
* @halted: Set if the endpoint has been halted.
* @periodic: Set if this is a periodic ep, such as Interrupt
* @isochronous: Set if this is a isochronous ep
* @send_zlp: Set if we need to send a zero-length packet.
* @total_data: The total number of data bytes done.
* @fifo_size: The size of the FIFO (for periodic IN endpoints)
* @fifo_load: The amount of data loaded into the FIFO (periodic IN)
* @last_load: The offset of data for the last start of request.
* @size_loaded: The last loaded size for DxEPTSIZE for periodic IN
*
* This is the driver's state for each registered enpoint, allowing it
* to keep track of transactions that need doing. Each endpoint has a
* lock to protect the state, to try and avoid using an overall lock
* for the host controller as much as possible.
*
* For periodic IN endpoints, we have fifo_size and fifo_load to try
* and keep track of the amount of data in the periodic FIFO for each
* of these as we don't have a status register that tells us how much
* is in each of them. (note, this may actually be useless information
* as in shared-fifo mode periodic in acts like a single-frame packet
* buffer than a fifo)
*/
struct dwc2_hsotg_ep {
struct usb_ep ep;
struct list_head queue;
struct dwc2_hsotg *parent;
struct dwc2_hsotg_req *req;
struct dentry *debugfs;
unsigned long total_data;
unsigned int size_loaded;
unsigned int last_load;
unsigned int fifo_load;
unsigned short fifo_size;
unsigned short fifo_index;
unsigned char<