PHYSMGMT_CLK
PUT16(W4_PHYSMGMT, val | PHYSMGMT_CLK);
PUT16(W4_PHYSMGMT, PHYSMGMT_DATA | PHYSMGMT_DIR | PHYSMGMT_CLK);
PUT16(W4_PHYSMGMT, PHYSMGMT_CLK); /* turnaround time */
PUT16(W4_PHYSMGMT, PHYSMGMT_CLK); /* idle time */
PUT16(W4_PHYSMGMT, PHYSMGMT_CLK);