107 lines
3.9 KiB
C
107 lines
3.9 KiB
C
/***********************license start***************
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* Copyright (c) 2003-2010 Cavium Inc. (support@cavium.com). All rights
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* reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of Cavium Inc. nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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* This Software, including technical data, may be subject to U.S. export control
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* laws, including the U.S. Export Administration Act and its associated
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* regulations, and may be subject to export or import regulations in other
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* countries.
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
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* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
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* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
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* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
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* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
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* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
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* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
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* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
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* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
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***********************license end**************************************/
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/**
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* @file
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*
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* Helper utilities for qlm_jtag.
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*
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* <hr>$Revision: 41586 $<hr>
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*/
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#ifndef __CVMX_HELPER_JTAG_H__
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#define __CVMX_HELPER_JTAG_H__
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/**
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* Initialize the internal QLM JTAG logic to allow programming
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* of the JTAG chain by the cvmx_helper_qlm_jtag_*() functions.
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* These functions should only be used at the direction of Cavium
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* Networks. Programming incorrect values into the JTAG chain
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* can cause chip damage.
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*/
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extern void cvmx_helper_qlm_jtag_init(void);
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/**
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* Write up to 32bits into the QLM jtag chain. Bits are shifted
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* into the MSB and out the LSB, so you should shift in the low
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* order bits followed by the high order bits. The JTAG chain for
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* CN52XX and CN56XX is 4 * 268 bits long, or 1072. The JTAG chain
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* for CN63XX is 4 * 300 bits long, or 1200.
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*
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* @param qlm QLM to shift value into
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* @param bits Number of bits to shift in (1-32).
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* @param data Data to shift in. Bit 0 enters the chain first, followed by
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* bit 1, etc.
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*
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* @return The low order bits of the JTAG chain that shifted out of the
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* circle.
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*/
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extern uint32_t cvmx_helper_qlm_jtag_shift(int qlm, int bits, uint32_t data);
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/**
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* Shift long sequences of zeros into the QLM JTAG chain. It is
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* common to need to shift more than 32 bits of zeros into the
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* chain. This function is a convience wrapper around
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* cvmx_helper_qlm_jtag_shift() to shift more than 32 bits of
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* zeros at a time.
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*
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* @param qlm QLM to shift zeros into
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* @param bits
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*/
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extern void cvmx_helper_qlm_jtag_shift_zeros(int qlm, int bits);
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/**
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* Program the QLM JTAG chain into all lanes of the QLM. You must
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* have already shifted in the proper number of bits into the
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* JTAG chain. Updating invalid values can possibly cause chip damage.
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*
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* @param qlm QLM to program
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*/
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extern void cvmx_helper_qlm_jtag_update(int qlm);
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/**
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* Load the QLM JTAG chain with data from all lanes of the QLM.
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*
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* @param qlm QLM to program
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*/
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extern void cvmx_helper_qlm_jtag_capture(int qlm);
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#endif /* __CVMX_HELPER_JTAG_H__ */
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