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