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44 * Helper utilities for qlm_jtag.
46 * <hr>$Revision: 41586 $<hr>
49 #ifndef __CVMX_HELPER_JTAG_H__
50 #define __CVMX_HELPER_JTAG_H__
53 * Initialize the internal QLM JTAG logic to allow programming
54 * of the JTAG chain by the cvmx_helper_qlm_jtag_*() functions.
55 * These functions should only be used at the direction of Cavium
56 * Networks. Programming incorrect values into the JTAG chain
57 * can cause chip damage.
59 extern void cvmx_helper_qlm_jtag_init(void);
62 * Write up to 32bits into the QLM jtag chain. Bits are shifted
63 * into the MSB and out the LSB, so you should shift in the low
64 * order bits followed by the high order bits. The JTAG chain for
65 * CN52XX and CN56XX is 4 * 268 bits long, or 1072. The JTAG chain
66 * for CN63XX is 4 * 300 bits long, or 1200.
68 * @param qlm QLM to shift value into
69 * @param bits Number of bits to shift in (1-32).
70 * @param data Data to shift in. Bit 0 enters the chain first, followed by
73 * @return The low order bits of the JTAG chain that shifted out of the
76 extern uint32_t cvmx_helper_qlm_jtag_shift(int qlm, int bits, uint32_t data);
79 * Shift long sequences of zeros into the QLM JTAG chain. It is
80 * common to need to shift more than 32 bits of zeros into the
81 * chain. This function is a convience wrapper around
82 * cvmx_helper_qlm_jtag_shift() to shift more than 32 bits of
85 * @param qlm QLM to shift zeros into
88 extern void cvmx_helper_qlm_jtag_shift_zeros(int qlm, int bits);
91 * Program the QLM JTAG chain into all lanes of the QLM. You must
92 * have already shifted in the proper number of bits into the
93 * JTAG chain. Updating invalid values can possibly cause chip damage.
95 * @param qlm QLM to program
97 extern void cvmx_helper_qlm_jtag_update(int qlm);
100 * Load the QLM JTAG chain with data from all lanes of the QLM.
102 * @param qlm QLM to program
104 extern void cvmx_helper_qlm_jtag_capture(int qlm);
106 #endif /* __CVMX_HELPER_JTAG_H__ */