diff options
Diffstat (limited to 'drivers/usb/host/shost/shost_mem.h')
| -rw-r--r-- | drivers/usb/host/shost/shost_mem.h | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/usb/host/shost/shost_mem.h b/drivers/usb/host/shost/shost_mem.h new file mode 100644 index 0000000..ecbbed2 --- /dev/null +++ b/drivers/usb/host/shost/shost_mem.h @@ -0,0 +1,155 @@ +/**************************************************************************** + * (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_ */ |