1 /***************************************************************************
2 * Copyright (C) 2007-2009 by Øyvind Harboe *
4 * This program is free software; you can redistribute it and/or modify *
5 * it under the terms of the GNU General Public License as published by *
6 * the Free Software Foundation; either version 2 of the License, or *
7 * (at your option) any later version. *
9 * This program is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU General Public License for more details. *
14 * You should have received a copy of the GNU General Public License *
15 * along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
18 ***************************************************************************/
20 /* used to test manual mode */
21 #define TEST_MANUAL() 0
26 #include <cyg/hal/hal_io.h> // low level i/o
27 #include <cyg/hal/hal_intr.h> // low level i/o
30 int diag_printf(const char *fmt, ...);
31 #define ZY1000_POKE(a, b) HAL_WRITE_UINT32(a, b); diag_printf("poke 0x%08x,0x%08x\n", a, b)
32 #define ZY1000_PEEK(a, b) HAL_READ_UINT32(a, b); diag_printf("peek 0x%08x = 0x%08x\n", a, b)
34 #define ZY1000_PEEK(a, b) HAL_READ_UINT32(a, b)
35 #define ZY1000_POKE(a, b) HAL_WRITE_UINT32(a, b)
40 /* redirect this to TCP/IP */
41 #define ZY1000_JTAG_BASE 0
42 extern void zy1000_tcpout(uint32_t address, uint32_t data);
43 extern uint32_t zy1000_tcpin(uint32_t address);
44 #define ZY1000_PEEK(a, b) b=zy1000_tcpin(a)
45 #define ZY1000_POKE(a, b) zy1000_tcpout(a, b)
52 static __inline__ void waitIdle(void)
57 ZY1000_PEEK(ZY1000_JTAG_BASE + 0x10, empty);
58 } while ((empty & 0x100) == 0);
61 static __inline__ void waitQueue(void)
66 static __inline__ void sampleShiftRegister(void)
71 ZY1000_PEEK(ZY1000_JTAG_BASE + 0xc, dummy);
75 static __inline__ void setCurrentState(enum tap_state state)
80 if (state == TAP_RESET)
82 // The FPGA nor we know the current state of the CPU TAP
83 // controller. This will move it to TAP for sure.
85 // 5 should be enough here, 7 is what OpenOCD uses
89 sampleShiftRegister();
90 ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (repeat << 8) | (a << 4) | a);
95 * Enter state and cause repeat transitions *out* of that state. So if the endState != state, then
96 * the transition from state to endState counts as a transition out of state.
98 static __inline__ void shiftValueInner(const enum tap_state state, const enum tap_state endState, int repeat, uint32_t value)
104 sampleShiftRegister();
105 ZY1000_POKE(ZY1000_JTAG_BASE + 0xc, value);
108 if ((state == TAP_DRSHIFT) && (endState != TAP_DRSHIFT))
111 setCurrentState(state);
112 for (i = 0; i < repeat; i++)
116 if ((i == repeat-1) && (state != endState))
120 /* shift out value */
122 ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, (((value >> i)&1) << 1) | tms);
125 ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, 0);
127 //ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, TAP_DRSHIFT); // set this state and things break => expected
128 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.
129 setCurrentState(endState);
132 ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (repeat << 8) | (a << 4) | b);
136 ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (repeat << 8) | (a << 4) | b);
139 /* maximum debug version */
140 if ((repeat > 0) && ((state == TAP_DRSHIFT)||(state == TAP_SI)))
143 /* sample shift register for every bit. */
144 for (i = 0; i < repeat-1; i++)
146 sampleShiftRegister();
147 ZY1000_POKE(ZY1000_JTAG_BASE + 0xc, value >> i);
148 ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (1 << 8) | (a << 4) | a);
150 sampleShiftRegister();
151 ZY1000_POKE(ZY1000_JTAG_BASE + 0xc, value >> (repeat-1));
152 ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (1 << 8) | (a << 4) | b);
155 sampleShiftRegister();
156 ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (repeat << 8) | (a << 4) | b);
158 sampleShiftRegister();
164 static __inline__ void interface_jtag_add_dr_out_core(struct jtag_tap *target_tap,
167 const uint32_t *value,
168 enum tap_state end_state)
170 enum tap_state pause_state = TAP_DRSHIFT;
172 struct jtag_tap *tap, *nextTap;
173 for (tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap = nextTap)
175 nextTap = jtag_tap_next_enabled(tap);
178 pause_state = end_state;
180 if (tap == target_tap)
183 for (j = 0; j < (num_fields-1); j++)
185 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[j], value[j]);
187 shiftValueInner(TAP_DRSHIFT, pause_state, num_bits[j], value[j]);
190 /* program the scan field to 1 bit length, and ignore it's value */
191 shiftValueInner(TAP_DRSHIFT, pause_state, 1, 0);
196 static __inline__ void interface_jtag_add_dr_out(struct jtag_tap *target_tap,
199 const uint32_t *value,
200 enum tap_state end_state)
203 int singletap = (jtag_tap_next_enabled(jtag_tap_next_enabled(NULL)) == NULL);
204 if ((singletap) && (num_fields == 3))
206 /* used by embeddedice_write_reg_inner() */
207 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[0], value[0]);
208 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[1], value[1]);
209 shiftValueInner(TAP_DRSHIFT, end_state, num_bits[2], value[2]);
210 } else if ((singletap) && (num_fields == 2))
212 /* used by arm7 code */
213 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[0], value[0]);
214 shiftValueInner(TAP_DRSHIFT, end_state, num_bits[1], value[1]);
217 interface_jtag_add_dr_out_core(target_tap, num_fields, num_bits, value, end_state);
221 #define interface_jtag_add_callback(callback, in) callback(in)
223 #define interface_jtag_add_callback4(callback, in, data1, data2, data3) jtag_set_error(callback(in, data1, data2, data3))