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- /***************************************************************************
- * Copyright (C) 2007-2008 by Øyvind Harboe *
- * *
- * 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., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
- ***************************************************************************/
-
- #include <cyg/hal/hal_io.h> // low level i/o
-
- //#define VERBOSE(a) a
- #define VERBOSE(a)
-
- /* used to test manual mode */
- #define TEST_MANUAL() 0
-
- #if 0
- int diag_printf(const char *fmt, ...);
- #define ZY1000_POKE(a, b) HAL_WRITE_UINT32(a, b); diag_printf("poke 0x%08x,0x%08x\n", a, b)
- #define ZY1000_PEEK(a, b) HAL_READ_UINT32(a, b); diag_printf("peek 0x%08x = 0x%08x\n", a, b)
- #else
- #define ZY1000_POKE(a, b) HAL_WRITE_UINT32(a, b)
- #define ZY1000_PEEK(a, b) HAL_READ_UINT32(a, b)
- #endif
-
- // FIFO empty?
- static __inline__ void waitIdle(void)
- {
- cyg_uint32 empty;
- do
- {
- ZY1000_PEEK(ZY1000_JTAG_BASE + 0x10, empty);
- } while ((empty & 0x100) == 0);
- }
-
- static __inline__ void waitQueue(void)
- {
- // waitIdle();
- }
-
- static void sampleShiftRegister(void)
- {
- #if 0
- cyg_uint32 dummy;
- waitIdle();
- ZY1000_PEEK(ZY1000_JTAG_BASE + 0xc, dummy);
- #endif
- }
-
- /* -O3 will inline this for us */
- static void setCurrentState(enum tap_state state)
- {
- cyg_uint32 a;
- a = state;
- int repeat = 0;
- if (state == TAP_RESET)
- {
- // The FPGA nor we know the current state of the CPU TAP
- // controller. This will move it to TAP for sure.
- //
- // 5 should be enough here, 7 is what OpenOCD uses
- repeat = 7;
- }
- waitQueue();
- sampleShiftRegister();
- ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (repeat << 8) | (a << 4) | a);
-
- }
-
- /*
- * Enter state and cause repeat transitions *out* of that state. So if the endState != state, then
- * the transition from state to endState counts as a transition out of state.
- */
- static __inline__ void shiftValueInner(const enum tap_state state, const enum tap_state endState, int repeat, cyg_uint32 value)
- {
- cyg_uint32 a,b;
- a = state;
- b = endState;
- waitQueue();
- sampleShiftRegister();
- ZY1000_POKE(ZY1000_JTAG_BASE + 0xc, value);
- #if 1
- #if TEST_MANUAL()
- if ((state == TAP_DRSHIFT) && (endState != TAP_DRSHIFT))
- {
- int i;
- setCurrentState(state);
- for (i = 0; i < repeat; i++)
- {
- int tms;
- tms = 0;
- if ((i == repeat-1) && (state != endState))
- {
- tms = 1;
- }
- /* shift out value */
- waitIdle();
- ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, (((value >> i)&1) << 1) | tms);
- }
- waitIdle();
- ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, 0);
- waitIdle();
- //ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, TAP_DRSHIFT); // set this state and things break => expected
- ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, TAP_DRPAUSE); // set this and things will work => expected. Not setting this is not sufficient to make things break.
- setCurrentState(endState);
- } else
- {
- ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (repeat << 8) | (a << 4) | b);
- }
- #else
- /* fast version */
- ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (repeat << 8) | (a << 4) | b);
- #endif
- #else
- /* maximum debug version */
- if ((repeat > 0) && ((state == TAP_DRSHIFT)||(state == TAP_SI)))
- {
- int i;
- /* sample shift register for every bit. */
- for (i = 0; i < repeat-1; i++)
- {
- sampleShiftRegister();
- ZY1000_POKE(ZY1000_JTAG_BASE + 0xc, value >> i);
- ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (1 << 8) | (a << 4) | a);
- }
- sampleShiftRegister();
- ZY1000_POKE(ZY1000_JTAG_BASE + 0xc, value >> (repeat-1));
- ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (1 << 8) | (a << 4) | b);
- } else
- {
- sampleShiftRegister();
- ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (repeat << 8) | (a << 4) | b);
- }
- sampleShiftRegister();
- #endif
- }
-
-
-
- static __inline__ void interface_jtag_add_dr_out_core(jtag_tap_t *target_tap,
- int num_fields,
- const int *num_bits,
- const uint32_t *value,
- enum tap_state end_state)
- {
- enum tap_state pause_state = TAP_DRSHIFT;
-
- jtag_tap_t *tap, *nextTap;
- for (tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap = nextTap)
- {
- nextTap = jtag_tap_next_enabled(tap);
- if (nextTap == NULL)
- {
- pause_state = end_state;
- }
- if (tap == target_tap)
- {
- int j;
- for (j = 0; j < (num_fields-1); j++)
- {
- shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[j], value[j]);
- }
- shiftValueInner(TAP_DRSHIFT, pause_state, num_bits[j], value[j]);
- } else
- {
- /* program the scan field to 1 bit length, and ignore it's value */
- shiftValueInner(TAP_DRSHIFT, pause_state, 1, 0);
- }
- }
- }
-
- static __inline__ void interface_jtag_add_dr_out(jtag_tap_t *target_tap,
- int num_fields,
- const int *num_bits,
- const uint32_t *value,
- enum tap_state end_state)
- {
-
- int singletap = (jtag_tap_next_enabled(jtag_tap_next_enabled(NULL)) == NULL);
- if ((singletap) && (num_fields == 3))
- {
- /* used by embeddedice_write_reg_inner() */
- shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[0], value[0]);
- shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[1], value[1]);
- shiftValueInner(TAP_DRSHIFT, end_state, num_bits[2], value[2]);
- } else if ((singletap) && (num_fields == 2))
- {
- /* used by arm7 code */
- shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[0], value[0]);
- shiftValueInner(TAP_DRSHIFT, end_state, num_bits[1], value[1]);
- } else
- {
- interface_jtag_add_dr_out_core(target_tap, num_fields, num_bits, value, end_state);
- }
- }
-
- #define interface_jtag_add_callback(callback, in) callback(in)
-
- #define interface_jtag_add_callback4(callback, in, data1, data2, data3) jtag_set_error(callback(in, data1, data2, data3))
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