drivers/misc/altera-stapl/altera-jtag.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * altera-jtag.h
   4  *
   5  * altera FPGA driver
   6  *
   7  * Copyright (C) Altera Corporation 1998-2001
   8  * Copyright (C) 2010 NetUP Inc.
   9  * Copyright (C) 2010 Igor M. Liplianin <liplianin@netup.ru>
  10  */
  11
  12 #ifndef ALTERA_JTAG_H
  13 #define ALTERA_JTAG_H
  14
  15 /* Function Prototypes */
  16 enum altera_jtag_state {
  17         ILLEGAL_JTAG_STATE = -1,
  18         RESET = 0,
  19         IDLE = 1,
  20         DRSELECT = 2,
  21         DRCAPTURE = 3,
  22         DRSHIFT = 4,
  23         DREXIT1 = 5,
  24         DRPAUSE = 6,
  25         DREXIT2 = 7,
  26         DRUPDATE = 8,
  27         IRSELECT = 9,
  28         IRCAPTURE = 10,
  29         IRSHIFT = 11,
  30         IREXIT1 = 12,
  31         IRPAUSE = 13,
  32         IREXIT2 = 14,
  33         IRUPDATE = 15
  34
  35 };
  36
  37 struct altera_jtag {
  38         /* Global variable to store the current JTAG state */
  39         enum altera_jtag_state jtag_state;
  40
  41         /* Store current stop-state for DR and IR scan commands */
  42         enum altera_jtag_state drstop_state;
  43         enum altera_jtag_state irstop_state;
  44
  45         /* Store current padding values */
  46         u32 dr_pre;
  47         u32 dr_post;
  48         u32 ir_pre;
  49         u32 ir_post;
  50         u32 dr_length;
  51         u32 ir_length;
  52         u8 *dr_pre_data;
  53         u8 *dr_post_data;
  54         u8 *ir_pre_data;
  55         u8 *ir_post_data;
  56         u8 *dr_buffer;
  57         u8 *ir_buffer;
  58 };
  59
  60 #define ALTERA_STACK_SIZE 128
  61 #define ALTERA_MESSAGE_LENGTH 1024
  62
  63 struct altera_state {
  64         struct altera_config    *config;
  65         struct altera_jtag      js;
  66         char                    msg_buff[ALTERA_MESSAGE_LENGTH + 1];
  67         long                    stack[ALTERA_STACK_SIZE];
  68 };
  69
  70 int altera_jinit(struct altera_state *astate);
  71 int altera_set_drstop(struct altera_jtag *js, enum altera_jtag_state state);
  72 int altera_set_irstop(struct altera_jtag *js, enum altera_jtag_state state);
  73 int altera_set_dr_pre(struct altera_jtag *js, u32 count, u32 start_index,
  74                                 u8 *preamble_data);
  75 int altera_set_ir_pre(struct altera_jtag *js, u32 count, u32 start_index,
  76                                 u8 *preamble_data);
  77 int altera_set_dr_post(struct altera_jtag *js, u32 count, u32 start_index,
  78                                 u8 *postamble_data);
  79 int altera_set_ir_post(struct altera_jtag *js, u32 count, u32 start_index,
  80                                 u8 *postamble_data);
  81 int altera_goto_jstate(struct altera_state *astate,
  82                                 enum altera_jtag_state state);
  83 int altera_wait_cycles(struct altera_state *astate, s32 cycles,
  84                                 enum altera_jtag_state wait_state);
  85 int altera_wait_msecs(struct altera_state *astate, s32 microseconds,
  86                                 enum altera_jtag_state wait_state);
  87 int altera_irscan(struct altera_state *astate, u32 count,
  88                                 u8 *tdi_data, u32 start_index);
  89 int altera_swap_ir(struct altera_state *astate,
  90                                 u32 count, u8 *in_data,
  91                                 u32 in_index, u8 *out_data,
  92                                 u32 out_index);
  93 int altera_drscan(struct altera_state *astate, u32 count,
  94                                 u8 *tdi_data, u32 start_index);
  95 int altera_swap_dr(struct altera_state *astate, u32 count,
  96                                 u8 *in_data, u32 in_index,
  97                                 u8 *out_data, u32 out_index);
  98 void altera_free_buffers(struct altera_state *astate);
  99 #endif /* ALTERA_JTAG_H */