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/*
* altera-jtag.h
*
* altera FPGA driver
*
* Copyright (C) Altera Corporation 1998-2001
* Copyright (C) 2010 NetUP Inc.
* Copyright (C) 2010 Igor M. Liplianin <liplianin@netup.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
*
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef ALTERA_JTAG_H
#define ALTERA_JTAG_H
/* Function Prototypes */
enum altera_jtag_state {
ILLEGAL_JTAG_STATE = -1,
RESET = 0,
IDLE = 1,
DRSELECT = 2,
DRCAPTURE = 3,
DRSHIFT = 4,
DREXIT1 = 5,
DRPAUSE = 6,
DREXIT2 = 7,
DRUPDATE = 8,
IRSELECT = 9,
IRCAPTURE = 10,
IRSHIFT = 11,
IREXIT1 = 12,
IRPAUSE = 13,
IREXIT2 = 14,
IRUPDATE = 15
};
struct altera_jtag {
/* Global variable to store the current JTAG state */
enum altera_jtag_state jtag_state;
/* Store current stop-state for DR and IR scan commands */
enum altera_jtag_state drstop_state;
enum altera_jtag_state irstop_state;
/* Store current padding values */
u32 dr_pre;
u32 dr_post;
u32 ir_pre;
u32 ir_post;
u32 dr_length;
u32 ir_length;
u8 *dr_pre_data;
u8 *dr_post_data;
u8 *ir_pre_data;
u8 *ir_post_data;
u8 *dr_buffer;
u8 *ir_buffer;
};
#define ALTERA_STACK_SIZE 128
#define ALTERA_MESSAGE_LENGTH 1024
struct altera_state {
struct altera_config *config;
struct altera_jtag js;
char msg_buff[ALTERA_MESSAGE_LENGTH + 1];
long stack[ALTERA_STACK_SIZE];
};
int altera_jinit(struct altera_state *astate);
int altera_set_drstop(struct altera_jtag *js, enum altera_jtag_state state);
int altera_set_irstop(struct altera_jtag *js, enum altera_jtag_state state);
int altera_set_dr_pre(struct altera_jtag *js, u32 count, u32 start_index,
u8 *preamble_data);
int altera_set_ir_pre(struct altera_jtag *js, u32 count, u32 start_index,
u8 *preamble_data);
int altera_set_dr_post(struct altera_jtag *js, u32 count, u32 start_index,
u8 *postamble_data);
int altera_set_ir_post(struct altera_jtag *js, u32 count, u32 start_index,
u8 *postamble_data);
int altera_goto_jstate(struct altera_state *astate,
enum altera_jtag_state state);
int altera_wait_cycles(struct altera_state *astate, s32 cycles,
enum altera_jtag_state wait_state);
int altera_wait_msecs(struct altera_state *astate, s32 microseconds,
enum altera_jtag_state wait_state);
int altera_irscan(struct altera_state *astate, u32 count,
u8 *tdi_data, u32 start_index);
int altera_swap_ir(struct altera_state *astate,
u32 count, u8 *in_data,
u32 in_index, u8 *out_data,
u32 out_index);
int altera_drscan(struct altera_state *astate, u32 count,
u8 *tdi_data, u32 start_index);
int altera_swap_dr(struct altera_state *astate, u32 count,
u8 *in_data, u32 in_index,
u8 *out_data, u32 out_index);
void altera_free_buffers(struct altera_state *astate);
#endif /* ALTERA_JTAG_H */
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