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/****************************************************************************
* (C) Copyright 2008 Samsung Electronics Co., Ltd., All rights reserved
*
* @file s3c-otg-hcdi-memory.h
* @brief header of s3c-otg-hcdi-memory \n
* @version
* -# Jun 9,2008 v1.0 by SeungSoo Yang (ss1.yang@samsung.com) \n
* : Creating the initial version of this code \n
* -# Jul 15,2008 v1.2 by SeungSoo Yang (ss1.yang@samsung.com) \n
* : Optimizing for performance \n
* @see None
****************************************************************************/
/****************************************************************************
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
****************************************************************************/
#ifndef _S3C_OTG_HCDI_MEMORY_H_
#define _S3C_OTG_HCDI_MEMORY_H_
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/mm.h>
/**
* @enum otg_mem_alloc_flag
*
* @brief enumeration for flag of memory allocation
*/
enum otg_mem_type {
USB_MEM_SYNC,
USB_MEM_ASYNC,
USB_MEM_DMA
};
/**
* int otg_mem_alloc(void ** addr_pp, u16 byte_size, u8 ubType);
*
* @brief allocating momory specified
*
* @param [inout] addr_pp : address to be assigned
* [in] byte_size : size of memory
* [in] type : enum otg_mem_type
*
* @return USB_ERR_SUCCESS : If success \n
* USB_ERR_FAIL : If call fail \n
*/
static inline int
otg_mem_alloc(void **addr_pp, u16 byte_size,
enum otg_mem_type type)
{
gfp_t flags;
otg_dbg(OTG_DBG_OTGHCDI_MEM, "otg_mem_alloc\n");
switch (type) {
case USB_MEM_SYNC:
flags = GFP_KERNEL;
break;
case USB_MEM_ASYNC:
flags = GFP_ATOMIC;
break;
case USB_MEM_DMA:
flags = GFP_DMA;
break;
default:
otg_err(OTG_DBG_OTGHCDI_MEM,
"not proper enum otg_mem_type\n");
return USB_ERR_FAIL;
}
*addr_pp = kmalloc((size_t)byte_size, flags);
if (*addr_pp == 0) {
otg_err(OTG_DBG_OTGHCDI_MEM, "kmalloc failed\n");
return USB_ERR_FAIL;
}
return USB_ERR_SUCCESS;
}
/**
* int otg_mem_copy(void *to_addr_p, void *from_addr_p, u16 byte_size);
*
* @brief memory copy
*
* @param [in] to_addr_p : target address
* [in] from_addr_p : source address
* [in] byte_size : size
*
* @return USB_ERR_SUCCESS : If success \n
* USB_ERR_FAIL : If call fail \n
*/
static inline int
otg_mem_copy(void *to_addr_p,
void *from_addr_p, u16 byte_size)
{
otg_dbg(OTG_DBG_OTGHCDI_MEM, "otg_mem_copy\n");
memcpy(to_addr_p, from_addr_p, (size_t)byte_size);
return USB_ERR_SUCCESS;
}
/**
* int otg_mem_free(void * addr_p);
*
* @brief de-allocating memory
*
* @param [in] addr_p : target address to be de-allocated
*
* @return USB_ERR_SUCCESS : If success \n
* USB_ERR_FAIL : If call fail \n
*/
static inline int
otg_mem_free(void *addr_p)
{
otg_dbg(OTG_DBG_OTGHCDI_MEM, "otg_mem_free\n");
kfree(addr_p);
return USB_ERR_SUCCESS;
}
/**
* int otg_mem_set(void *addr_p, char value, u16 byte_size)
*
* @brief writing a value to memory
*
* @param [in] addr_p : target address
* [in] value : value to be written
* [in] byte_size : size
*
* @return USB_ERR_SUCCESS : If success \n
* USB_ERR_FAIL : If call fail \n
*/
static inline int
otg_mem_set(void *addr_p, char value, u16 byte_size)
{
otg_dbg(OTG_DBG_OTGHCDI_MEM, "otg_mem_set\n");
memset(addr_p, value, (size_t)byte_size);
return USB_ERR_SUCCESS;
}
#endif /* _S3C_OTG_HCDI_MEMORY_H_ */
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