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/*
* Copyright (c) 2009 NVIDIA Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 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.
*
* Neither the name of the NVIDIA Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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 HOLDER 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.
*
*/
/** @file
* @brief <b>NVIDIA Driver Development Kit: Fuse API</b>
*
* @b Description: Contains the NvRM chip unique id implementation.
*/
#include "nvassert.h"
#include "nvrm_drf.h"
#include "nvos.h"
#include "nvrm_module.h"
#include "nvrm_hardware_access.h"
#include "nvrm_hwintf.h"
#include "ap20/arclk_rst.h"
#include "ap20/arfuse.h"
#include "ap20/ap20rm_misc_private.h"
#include "ap20rm_clocks.h"
NvError NvRmPrivAp20ChipUniqueId(NvRmDeviceHandle hDevHandle,void* pId)
{
NvU64* pOut = (NvU64*)pId; // Pointer to output buffer
NvU32 OldRegData; // Old register contents
NvU32 NewRegData; // New register contents
NV_ASSERT(hDevHandle);
NV_ASSERT(pId);
#if NV_USE_FUSE_CLOCK_ENABLE
// Enable fuse clock
Ap20EnableModuleClock(hDevHandle, NvRmModuleID_Fuse, NV_TRUE);
#endif
// Access to unique id is protected, so make sure all registers visible first.
OldRegData = NV_REGR(hDevHandle, NvRmPrivModuleID_ClockAndReset, 0, CLK_RST_CONTROLLER_MISC_CLK_ENB_0);
NewRegData = NV_FLD_SET_DRF_NUM(CLK_RST_CONTROLLER, MISC_CLK_ENB, CFG_ALL_VISIBLE, 1, OldRegData);
NV_REGW(hDevHandle, NvRmPrivModuleID_ClockAndReset, 0, CLK_RST_CONTROLLER_MISC_CLK_ENB_0, NewRegData);
// Read the secure id from the fuse registers and copy to the output buffer.
*pOut = ((NvU64)NV_REGR(hDevHandle, (NvRmPrivModuleID)NvRmModuleID_Fuse, 0, FUSE_JTAG_SECUREID_0_0)) |
(((NvU64)NV_REGR(hDevHandle, (NvRmPrivModuleID)NvRmModuleID_Fuse, 0, FUSE_JTAG_SECUREID_1_0)) << 32);
// Restore the protected registers enable to the way we found it.
NV_REGW(hDevHandle, NvRmPrivModuleID_ClockAndReset, 0, CLK_RST_CONTROLLER_MISC_CLK_ENB_0, OldRegData);
#if NV_USE_FUSE_CLOCK_ENABLE
// Disable fuse clock
Ap20EnableModuleClock(hDevHandle, NvRmModuleID_Fuse, NV_FALSE);
#endif
return NvError_Success;
}
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