src/pld/virtex2.c

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "virtex2.h"
  25 #include "xilinx_bit.h"
  26 #include "pld.h"
  27
  28
  29 static int virtex2_register_commands(struct command_context_s *cmd_ctx);
  30 static int virtex2_pld_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct pld_device_s *pld_device);
  31 static int virtex2_load(struct pld_device_s *pld_device, char *filename);
  32
  33 pld_driver_t virtex2_pld =
  34 {
  35         .name = "virtex2",
  36         .register_commands = virtex2_register_commands,
  37         .pld_device_command = virtex2_pld_device_command,
  38         .load = virtex2_load,
  39 };
  40
  41 static int virtex2_set_instr(jtag_tap_t *tap, uint32_t new_instr)
  42 {
  43         if (tap == NULL)
  44                 return ERROR_FAIL;
  45
  46         if (buf_get_u32(tap->cur_instr, 0, tap->ir_length) != new_instr)
  47         {
  48                 scan_field_t field;
  49
  50                 field.tap = tap;
  51                 field.num_bits = tap->ir_length;
  52                 field.out_value = calloc(CEIL(field.num_bits, 8), 1);
  53                 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
  54                 field.in_value = NULL;
  55
  56                 jtag_add_ir_scan(1, &field, jtag_set_end_state(TAP_IDLE));
  57
  58                 free(field.out_value);
  59         }
  60
  61         return ERROR_OK;
  62 }
  63
  64 static int virtex2_send_32(struct pld_device_s *pld_device,
  65                 int num_words, uint32_t *words)
  66 {
  67         virtex2_pld_device_t *virtex2_info = pld_device->driver_priv;
  68         scan_field_t scan_field;
  69         uint8_t *values;
  70         int i;
  71
  72         values = malloc(num_words * 4);
  73
  74         scan_field.tap = virtex2_info->tap;
  75         scan_field.num_bits = num_words * 32;
  76         scan_field.out_value = values;
  77         scan_field.in_value = NULL;
  78
  79         for (i = 0; i < num_words; i++)
  80                 buf_set_u32(values + 4 * i, 0, 32, flip_u32(*words++, 32));
  81
  82         virtex2_set_instr(virtex2_info->tap, 0x5); /* CFG_IN */
  83
  84         jtag_add_dr_scan(1, &scan_field, jtag_set_end_state(TAP_DRPAUSE));
  85
  86         free(values);
  87
  88         return ERROR_OK;
  89 }
  90
  91 static __inline__ void virtexflip32(jtag_callback_data_t arg)
  92 {
  93   uint8_t *in = (uint8_t *)arg;
  94         *((uint32_t *)in) = flip_u32(le_to_h_u32(in), 32);
  95 }
  96
  97 static int virtex2_receive_32(struct pld_device_s *pld_device,
  98                 int num_words, uint32_t *words)
  99 {
 100         virtex2_pld_device_t *virtex2_info = pld_device->driver_priv;
 101         scan_field_t scan_field;
 102
 103         scan_field.tap = virtex2_info->tap;
 104         scan_field.num_bits = 32;
 105         scan_field.out_value = NULL;
 106         scan_field.in_value = NULL;
 107
 108         virtex2_set_instr(virtex2_info->tap, 0x4); /* CFG_OUT */
 109
 110         while (num_words--)
 111         {
 112                 scan_field.in_value = (uint8_t *)words;
 113
 114                 jtag_add_dr_scan(1, &scan_field, jtag_set_end_state(TAP_DRPAUSE));
 115
 116                 jtag_add_callback(virtexflip32, (jtag_callback_data_t)words);
 117
 118                 words++;;
 119         }
 120
 121         return ERROR_OK;
 122 }
 123
 124 static int virtex2_read_stat(struct pld_device_s *pld_device, uint32_t *status)
 125 {
 126         uint32_t data[5];
 127
 128         jtag_add_tlr();
 129
 130         data[0] = 0xaa995566; /* synch word */
 131         data[1] = 0x2800E001; /* Type 1, read, address 7, 1 word */
 132         data[2] = 0x20000000; /* NOOP (Type 1, read, address 0, 0 words */
 133         data[3] = 0x20000000; /* NOOP */
 134         data[4] = 0x20000000; /* NOOP */
 135         virtex2_send_32(pld_device, 5, data);
 136
 137         virtex2_receive_32(pld_device, 1, status);
 138
 139         jtag_execute_queue();
 140
 141         LOG_DEBUG("status: 0x%8.8" PRIx32 "", *status);
 142
 143         return ERROR_OK;
 144 }
 145
 146 static int virtex2_load(struct pld_device_s *pld_device, char *filename)
 147 {
 148         virtex2_pld_device_t *virtex2_info = pld_device->driver_priv;
 149         xilinx_bit_file_t bit_file;
 150         int retval;
 151         unsigned int i;
 152         scan_field_t field;
 153
 154         field.tap = virtex2_info->tap;
 155         field.in_value = NULL;
 156
 157         if ((retval = xilinx_read_bit_file(&bit_file, filename)) != ERROR_OK)
 158                 return retval;
 159
 160         jtag_set_end_state(TAP_IDLE);
 161         virtex2_set_instr(virtex2_info->tap, 0xb); /* JPROG_B */
 162         jtag_execute_queue();
 163         jtag_add_sleep(1000);
 164
 165         virtex2_set_instr(virtex2_info->tap, 0x5); /* CFG_IN */
 166         jtag_execute_queue();
 167
 168         for (i = 0; i < bit_file.length; i++)
 169                 bit_file.data[i] = flip_u32(bit_file.data[i], 8);
 170
 171         field.num_bits = bit_file.length * 8;
 172         field.out_value = bit_file.data;
 173
 174         jtag_add_dr_scan(1, &field, jtag_set_end_state(TAP_DRPAUSE));
 175         jtag_execute_queue();
 176
 177         jtag_add_tlr();
 178
 179         jtag_set_end_state(TAP_IDLE);
 180         virtex2_set_instr(virtex2_info->tap, 0xc); /* JSTART */
 181         jtag_add_runtest(13, jtag_set_end_state(TAP_IDLE));
 182         virtex2_set_instr(virtex2_info->tap, 0x3f); /* BYPASS */
 183         virtex2_set_instr(virtex2_info->tap, 0x3f); /* BYPASS */
 184         virtex2_set_instr(virtex2_info->tap, 0xc); /* JSTART */
 185         jtag_add_runtest(13, jtag_set_end_state(TAP_IDLE));
 186         virtex2_set_instr(virtex2_info->tap, 0x3f); /* BYPASS */
 187         jtag_execute_queue();
 188
 189         return ERROR_OK;
 190 }
 191
 192 static int virtex2_handle_read_stat_command(struct command_context_s *cmd_ctx,
 193                 char *cmd, char **args, int argc)
 194 {
 195         pld_device_t *device;
 196         virtex2_pld_device_t *virtex2_info;
 197         uint32_t status;
 198
 199         if (argc < 1)
 200         {
 201                 command_print(cmd_ctx, "usage: virtex2 read_stat <num>");
 202                 return ERROR_OK;
 203         }
 204
 205         device = get_pld_device_by_num(strtoul(args[0], NULL, 0));
 206         if (!device)
 207         {
 208                 command_print(cmd_ctx, "pld device '#%s' is out of bounds", args[0]);
 209                 return ERROR_OK;
 210         }
 211
 212         virtex2_info = device->driver_priv;
 213
 214         virtex2_read_stat(device, &status);
 215
 216         command_print(cmd_ctx, "virtex2 status register: 0x%8.8" PRIx32 "", status);
 217
 218         return ERROR_OK;
 219 }
 220
 221 static int virtex2_register_commands(struct command_context_s *cmd_ctx)
 222 {
 223         command_t *virtex2_cmd = register_command(cmd_ctx, NULL, "virtex2", NULL, COMMAND_ANY, "virtex2 specific commands");
 224
 225         register_command(cmd_ctx, virtex2_cmd, "read_stat", virtex2_handle_read_stat_command, COMMAND_EXEC,
 226                                          "read Virtex-II status register");
 227
 228         return ERROR_OK;
 229 }
 230
 231 static int virtex2_pld_device_command(struct command_context_s *cmd_ctx,
 232                 char *cmd, char **args, int argc, struct pld_device_s *pld_device)
 233 {
 234         jtag_tap_t *tap;
 235
 236         virtex2_pld_device_t *virtex2_info;
 237
 238         if (argc < 2)
 239         {
 240                 LOG_WARNING("incomplete pld device 'virtex2' configuration");
 241                 return ERROR_PLD_DEVICE_INVALID;
 242         }
 243
 244         tap = jtag_tap_by_string(args[1]);
 245         if (tap == NULL) {
 246                 command_print(cmd_ctx, "Tap: %s does not exist", args[1]);
 247                 return ERROR_OK;
 248         }
 249
 250         virtex2_info = malloc(sizeof(virtex2_pld_device_t));
 251         pld_device->driver_priv = virtex2_info;
 252         virtex2_info->tap = tap;
 253
 254         return ERROR_OK;
 255 }