cd04a5f1aa
The current code assumed that READ/WRITE would produce atomic read/writes for 8/16/32-bit words, which in turned put assumption on the memcpy function. Since some memcpy implementation do not always guarantee such strong assumption, introduce two new operation READ/WRITE_ATOMIC which provide the necessary tools to do correct read and write to register in a single memory access. Change-Id: I37451bd5057bb0dcaf5a800d8aef8791c792a090
70 lines
No EOL
2.8 KiB
C
70 lines
No EOL
2.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2012 by Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef __HWSTUB__
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#define __HWSTUB__
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#include <libusb.h>
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#include "hwstub_protocol.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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*
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* Low-Level interface
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*
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*/
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struct hwstub_device_t;
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/* Returns hwstub interface, or -1 if none was found */
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int hwstub_probe(libusb_device *dev);
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/* Helper function which returns a list of all hwstub devices found. The caller
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* must unref all of them when done, possibly using libusb_free_device_list().
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* Return number of devices or <0 on error */
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ssize_t hwstub_get_device_list(libusb_context *ctx, libusb_device ***list);
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/* Returns NULL on error */
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struct hwstub_device_t *hwstub_open(libusb_device_handle *handle);
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/* Returns 0 on success. Does *NOT* close the usb handle */
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int hwstub_release(struct hwstub_device_t *dev);
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/* Returns number of bytes filled */
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int hwstub_get_desc(struct hwstub_device_t *dev, uint16_t desc, void *info, size_t sz);
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/* Returns number of bytes filled */
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int hwstub_get_log(struct hwstub_device_t *dev, void *buf, size_t sz);
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/* Returns number of bytes written/read or <0 on error */
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int hwstub_read(struct hwstub_device_t *dev, uint32_t addr, void *buf, size_t sz);
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int hwstub_read_atomic(struct hwstub_device_t *dev, uint32_t addr, void *buf, size_t sz);
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int hwstub_write(struct hwstub_device_t *dev, uint32_t addr, const void *buf, size_t sz);
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int hwstub_write_atomic(struct hwstub_device_t *dev, uint32_t addr, const void *buf, size_t sz);
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int hwstub_rw_mem(struct hwstub_device_t *dev, int read, uint32_t addr, void *buf, size_t sz);
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int hwstub_rw_mem_atomic(struct hwstub_device_t *dev, int read, uint32_t addr, void *buf, size_t sz);
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/* Returns <0 on error */
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int hwstub_exec(struct hwstub_device_t *dev, uint32_t addr, uint16_t flags);
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int hwstub_call(struct hwstub_device_t *dev, uint32_t addr);
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int hwstub_jump(struct hwstub_device_t *dev, uint32_t addr);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif /* __HWSTUB__ */ |