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   1 /***************************************************************************
   2  *   Copyright (C) 2007-2010 by Øyvind Harboe                              *
   3  *                                                                         *
   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.                                   *
   8  *                                                                         *
   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.                          *
  13  *                                                                         *
  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  ***************************************************************************/
  19
  20 /* used to test manual mode */
  21 #define TEST_MANUAL() 0
  22 #define VERBOSE(a)
  23
  24 #if BUILD_ZY1000_MASTER
  25
  26 #if BUILD_ECOSBOARD
  27 #include <cyg/hal/hal_io.h>             // low level i/o
  28 #include <cyg/hal/hal_intr.h>             // low level i/o
  29 #define ZY1000_PEEK(a, b) HAL_READ_UINT32(a, b)
  30 #define ZY1000_POKE(a, b) HAL_WRITE_UINT32(a, b)
  31 #else
  32 #define ZY1000_PEEK(a, b) do {b = *( ( volatile uint32_t *)(a) );} while (0)
  33 #define ZY1000_POKE(a, b) do {*( ( volatile uint32_t *)(a) ) = b;} while (0)
  34 extern volatile void *zy1000_jtag_master;
  35 #define ZY1000_JTAG_BASE ((unsigned long)zy1000_jtag_master)
  36 #endif
  37
  38 #else
  39
  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)
  46
  47 #endif
  48
  49
  50
  51 #if BUILD_ZY1000_MASTER
  52 // FIFO empty?
  53 static __inline__ void waitIdle(void)
  54 {
  55         uint32_t empty;
  56         do
  57         {
  58                 ZY1000_PEEK(ZY1000_JTAG_BASE + 0x10, empty);
  59         } while ((empty & 0x100) == 0);
  60 }
  61
  62 static __inline__ void zy1000_flush_readqueue(void)
  63 {
  64         /* Not used w/hardware fifo */
  65 }
  66 static __inline__ void zy1000_flush_callbackqueue(void)
  67 {
  68         /* Not used w/hardware fifo */
  69 }
  70 #else
  71 extern void waitIdle(void);
  72 void zy1000_flush_readqueue(void);
  73 void zy1000_flush_callbackqueue(void);
  74 void zy1000_jtag_add_callback4(jtag_callback_t callback, jtag_callback_data_t data0, jtag_callback_data_t data1, jtag_callback_data_t data2, jtag_callback_data_t data3);
  75 void zy1000_jtag_add_callback(jtag_callback1_t callback, jtag_callback_data_t data0);
  76 #endif
  77
  78 static __inline__ void waitQueue(void)
  79 {
  80 //      waitIdle();
  81 }
  82
  83 static __inline__ void sampleShiftRegister(void)
  84 {
  85 #if 0
  86         uint32_t dummy;
  87         waitIdle();
  88         ZY1000_PEEK(ZY1000_JTAG_BASE + 0xc, dummy);
  89 #endif
  90 }
  91
  92 static __inline__ void setCurrentState(enum tap_state state)
  93 {
  94         uint32_t a;
  95         a = state;
  96         int repeat = 0;
  97         if (state == TAP_RESET)
  98         {
  99                 // The FPGA nor we know the current state of the CPU TAP
 100                 // controller. This will move it to TAP for sure.
 101                 //
 102                 // 5 should be enough here, 7 is what OpenOCD uses
 103                 repeat = 7;
 104         }
 105         waitQueue();
 106         sampleShiftRegister();
 107         ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (repeat << 8) | (a << 4) | a);
 108
 109 }
 110
 111 /*
 112  * Enter state and cause repeat transitions *out* of that state. So if the endState != state, then
 113  * the transition from state to endState counts as a transition out of state.
 114  */
 115 static __inline__ void shiftValueInner(const enum tap_state state, const enum tap_state endState, int repeat, uint32_t value)
 116 {
 117         uint32_t a,b;
 118         a = state;
 119         b = endState;
 120         waitQueue();
 121         sampleShiftRegister();
 122         ZY1000_POKE(ZY1000_JTAG_BASE + 0xc, value);
 123 #if 1
 124 #if TEST_MANUAL()
 125         if ((state == TAP_DRSHIFT) && (endState != TAP_DRSHIFT))
 126         {
 127                 int i;
 128                 setCurrentState(state);
 129                 for (i = 0; i < repeat; i++)
 130                 {
 131                         int tms;
 132                         tms = 0;
 133                         if ((i == repeat-1) && (state != endState))
 134                         {
 135                                 tms = 1;
 136                         }
 137                         /* shift out value */
 138                         waitIdle();
 139                         ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, (((value >> i)&1) << 1) | tms);
 140                 }
 141                 waitIdle();
 142                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x28, 0);
 143                 waitIdle();
 144                 //ZY1000_POKE(ZY1000_JTAG_BASE + 0x20, TAP_DRSHIFT); // set this state and things break => expected
 145                 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.
 146                 setCurrentState(endState);
 147         } else
 148         {
 149                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (repeat << 8) | (a << 4) | b);
 150         }
 151 #else
 152         /* fast version */
 153         ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (repeat << 8) | (a << 4) | b);
 154 #endif
 155 #else
 156         /* maximum debug version */
 157         if ((repeat > 0) && ((state == TAP_DRSHIFT)||(state == TAP_SI)))
 158         {
 159                 int i;
 160                 /* sample shift register for every bit. */
 161                 for (i = 0; i < repeat-1; i++)
 162                 {
 163                         sampleShiftRegister();
 164                         ZY1000_POKE(ZY1000_JTAG_BASE + 0xc, value >> i);
 165                         ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (1 << 8) | (a << 4) | a);
 166                 }
 167                 sampleShiftRegister();
 168                 ZY1000_POKE(ZY1000_JTAG_BASE + 0xc, value >> (repeat-1));
 169                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (1 << 8) | (a << 4) | b);
 170         } else
 171         {
 172                 sampleShiftRegister();
 173                 ZY1000_POKE(ZY1000_JTAG_BASE + 0x8, (repeat << 8) | (a << 4) | b);
 174         }
 175         sampleShiftRegister();
 176 #endif
 177 }
 178
 179
 180
 181 static __inline__ void interface_jtag_add_dr_out_core(struct jtag_tap *target_tap,
 182                 int num_fields,
 183                 const int *num_bits,
 184                 const uint32_t *value,
 185                 enum tap_state end_state)
 186 {
 187         enum tap_state pause_state = TAP_DRSHIFT;
 188
 189         struct jtag_tap *tap, *nextTap;
 190         for (tap = jtag_tap_next_enabled(NULL); tap!= NULL; tap = nextTap)
 191         {
 192                 nextTap = jtag_tap_next_enabled(tap);
 193                 if (nextTap == NULL)
 194                 {
 195                         pause_state = end_state;
 196                 }
 197                 if (tap == target_tap)
 198                 {
 199                         int j;
 200                         for (j = 0; j < (num_fields-1); j++)
 201                         {
 202                                 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[j], value[j]);
 203                         }
 204                         shiftValueInner(TAP_DRSHIFT, pause_state, num_bits[j], value[j]);
 205                 } else
 206                 {
 207                         /* program the scan field to 1 bit length, and ignore it's value */
 208                         shiftValueInner(TAP_DRSHIFT, pause_state, 1, 0);
 209                 }
 210         }
 211 }
 212
 213 static __inline__ void interface_jtag_add_dr_out(struct jtag_tap *target_tap,
 214                 int num_fields,
 215                 const int *num_bits,
 216                 const uint32_t *value,
 217                 enum tap_state end_state)
 218 {
 219
 220         int singletap = (jtag_tap_next_enabled(jtag_tap_next_enabled(NULL)) == NULL);
 221         if ((singletap) && (num_fields == 3))
 222         {
 223                 /* used by embeddedice_write_reg_inner() */
 224                 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[0], value[0]);
 225                 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[1], value[1]);
 226                 shiftValueInner(TAP_DRSHIFT, end_state, num_bits[2], value[2]);
 227         } else if ((singletap) && (num_fields == 2))
 228         {
 229                 /* used by arm7 code */
 230                 shiftValueInner(TAP_DRSHIFT, TAP_DRSHIFT, num_bits[0], value[0]);
 231                 shiftValueInner(TAP_DRSHIFT, end_state, num_bits[1], value[1]);
 232         } else
 233         {
 234                 interface_jtag_add_dr_out_core(target_tap, num_fields, num_bits, value, end_state);
 235         }
 236 }
 237
 238 #if BUILD_ZY1000_MASTER
 239 #define interface_jtag_add_callback(callback, in) callback(in)
 240 #define interface_jtag_add_callback4(callback, in, data1, data2, data3) jtag_set_error(callback(in, data1, data2, data3))
 241 #else
 242 #define interface_jtag_add_callback(callback, in) zy1000_jtag_add_callback(callback, in)
 243 #define interface_jtag_add_callback4(callback, in, data1, data2, data3) zy1000_jtag_add_callback4(callback, in, data1, data2, data3)
 244 #endif