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, u32 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, u32 *words)
  66 {
  67         virtex2_pld_device_t *virtex2_info = pld_device->driver_priv;
  68         scan_field_t scan_field;
  69         u8 *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(u8 *in)
  92 {
  93         *((u32 *)in) = flip_u32(le_to_h_u32(in), 32);
  94 }
  95
  96 static int virtex2_receive_32(struct pld_device_s *pld_device,
  97                 int num_words, u32 *words)
  98 {
  99         virtex2_pld_device_t *virtex2_info = pld_device->driver_priv;
 100         scan_field_t scan_field;
 101
 102         scan_field.tap = virtex2_info->tap;
 103         scan_field.num_bits = 32;
 104         scan_field.out_value = NULL;
 105         scan_field.in_value = NULL;
 106
 107         virtex2_set_instr(virtex2_info->tap, 0x4); /* CFG_OUT */
 108
 109         while (num_words--)
 110         {
 111                 scan_field.in_value = (u8 *)words;
 112
 113                 jtag_add_dr_scan(1, &scan_field, jtag_set_end_state(TAP_DRPAUSE));
 114
 115                 jtag_add_callback(virtexflip32, (u8 *)words);
 116
 117                 words++;;
 118         }
 119
 120         return ERROR_OK;
 121 }
 122
 123 static int virtex2_read_stat(struct pld_device_s *pld_device, u32 *status)
 124 {
 125         u32 data[5];
 126
 127         jtag_add_tlr();
 128
 129         data[0] = 0xaa995566; /* synch word */
 130         data[1] = 0x2800E001; /* Type 1, read, address 7, 1 word */
 131         data[2] = 0x20000000; /* NOOP (Type 1, read, address 0, 0 words */
 132         data[3] = 0x20000000; /* NOOP */
 133         data[4] = 0x20000000; /* NOOP */
 134         virtex2_send_32(pld_device, 5, data);
 135
 136         virtex2_receive_32(pld_device, 1, status);
 137
 138         jtag_execute_queue();
 139
 140         LOG_DEBUG("status: 0x%8.8x", *status);
 141
 142         return ERROR_OK;
 143 }
 144
 145 static int virtex2_load(struct pld_device_s *pld_device, char *filename)
 146 {
 147         virtex2_pld_device_t *virtex2_info = pld_device->driver_priv;
 148         xilinx_bit_file_t bit_file;
 149         int retval;
 150         unsigned int i;
 151         scan_field_t field;
 152
 153         field.tap = virtex2_info->tap;
 154         field.in_value = NULL;
 155
 156         if ((retval = xilinx_read_bit_file(&bit_file, filename)) != ERROR_OK)
 157                 return retval;
 158
 159         jtag_set_end_state(TAP_IDLE);
 160         virtex2_set_instr(virtex2_info->tap, 0xb); /* JPROG_B */
 161         jtag_execute_queue();
 162         jtag_add_sleep(1000);
 163
 164         virtex2_set_instr(virtex2_info->tap, 0x5); /* CFG_IN */
 165         jtag_execute_queue();
 166
 167         for (i = 0; i < bit_file.length; i++)
 168                 bit_file.data[i] = flip_u32(bit_file.data[i], 8);
 169
 170         field.num_bits = bit_file.length * 8;
 171         field.out_value = bit_file.data;
 172
 173         jtag_add_dr_scan(1, &field, jtag_set_end_state(TAP_DRPAUSE));
 174         jtag_execute_queue();
 175
 176         jtag_add_tlr();
 177
 178         jtag_set_end_state(TAP_IDLE);
 179         virtex2_set_instr(virtex2_info->tap, 0xc); /* JSTART */
 180         jtag_add_runtest(13, jtag_set_end_state(TAP_IDLE));
 181         virtex2_set_instr(virtex2_info->tap, 0x3f); /* BYPASS */
 182         virtex2_set_instr(virtex2_info->tap, 0x3f); /* BYPASS */
 183         virtex2_set_instr(virtex2_info->tap, 0xc); /* JSTART */
 184         jtag_add_runtest(13, jtag_set_end_state(TAP_IDLE));
 185         virtex2_set_instr(virtex2_info->tap, 0x3f); /* BYPASS */
 186         jtag_execute_queue();
 187
 188         return ERROR_OK;
 189 }
 190
 191 static int virtex2_handle_read_stat_command(struct command_context_s *cmd_ctx,
 192                 char *cmd, char **args, int argc)
 193 {
 194         pld_device_t *device;
 195         virtex2_pld_device_t *virtex2_info;
 196         u32 status;
 197
 198         if (argc < 1)
 199         {
 200                 command_print(cmd_ctx, "usage: virtex2 read_stat <num>");
 201                 return ERROR_OK;
 202         }
 203
 204         device = get_pld_device_by_num(strtoul(args[0], NULL, 0));
 205         if (!device)
 206         {
 207                 command_print(cmd_ctx, "pld device '#%s' is out of bounds", args[0]);
 208                 return ERROR_OK;
 209         }
 210
 211         virtex2_info = device->driver_priv;
 212
 213         virtex2_read_stat(device, &status);
 214
 215         command_print(cmd_ctx, "virtex2 status register: 0x%8.8x", status);
 216
 217         return ERROR_OK;
 218 }
 219
 220 static int virtex2_register_commands(struct command_context_s *cmd_ctx)
 221 {
 222         command_t *virtex2_cmd = register_command(cmd_ctx, NULL, "virtex2", NULL, COMMAND_ANY, "virtex2 specific commands");
 223
 224         register_command(cmd_ctx, virtex2_cmd, "read_stat", virtex2_handle_read_stat_command, COMMAND_EXEC,
 225                                          "read Virtex-II status register");
 226
 227         return ERROR_OK;
 228 }
 229
 230 static int virtex2_pld_device_command(struct command_context_s *cmd_ctx,
 231                 char *cmd, char **args, int argc, struct pld_device_s *pld_device)
 232 {
 233         jtag_tap_t *tap;
 234
 235         virtex2_pld_device_t *virtex2_info;
 236
 237         if (argc < 2)
 238         {
 239                 LOG_WARNING("incomplete pld device 'virtex2' configuration");
 240                 return ERROR_PLD_DEVICE_INVALID;
 241         }
 242
 243         tap = jtag_tap_by_string(args[1]);
 244         if (tap == NULL) {
 245                 command_print( cmd_ctx, "Tap: %s does not exist", args[1] );
 246                 return ERROR_OK;
 247         }
 248
 249         virtex2_info = malloc(sizeof(virtex2_pld_device_t));
 250         pld_device->driver_priv = virtex2_info;
 251         virtex2_info->tap = tap;
 252
 253         return ERROR_OK;
 254 }