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   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_set_instr(struct jtag_tap *tap, uint32_t new_instr)
  30 {
  31         if (tap == NULL)
  32                 return ERROR_FAIL;
  33
  34         if (buf_get_u32(tap->cur_instr, 0, tap->ir_length) != new_instr)
  35         {
  36                 struct scan_field field;
  37
  38                 field.num_bits = tap->ir_length;
  39                 field.out_value = calloc(DIV_ROUND_UP(field.num_bits, 8), 1);
  40                 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
  41                 field.in_value = NULL;
  42
  43                 jtag_add_ir_scan(tap, &field, jtag_set_end_state(TAP_IDLE));
  44
  45                 free(field.out_value);
  46         }
  47
  48         return ERROR_OK;
  49 }
  50
  51 static int virtex2_send_32(struct pld_device *pld_device,
  52                 int num_words, uint32_t *words)
  53 {
  54         struct virtex2_pld_device *virtex2_info = pld_device->driver_priv;
  55         struct scan_field scan_field;
  56         uint8_t *values;
  57         int i;
  58
  59         values = malloc(num_words * 4);
  60
  61         scan_field.num_bits = num_words * 32;
  62         scan_field.out_value = values;
  63         scan_field.in_value = NULL;
  64
  65         for (i = 0; i < num_words; i++)
  66                 buf_set_u32(values + 4 * i, 0, 32, flip_u32(*words++, 32));
  67
  68         virtex2_set_instr(virtex2_info->tap, 0x5); /* CFG_IN */
  69
  70         jtag_add_dr_scan(virtex2_info->tap, 1, &scan_field, jtag_set_end_state(TAP_DRPAUSE));
  71
  72         free(values);
  73
  74         return ERROR_OK;
  75 }
  76
  77 static __inline__ void virtexflip32(jtag_callback_data_t arg)
  78 {
  79   uint8_t *in = (uint8_t *)arg;
  80         *((uint32_t *)in) = flip_u32(le_to_h_u32(in), 32);
  81 }
  82
  83 static int virtex2_receive_32(struct pld_device *pld_device,
  84                 int num_words, uint32_t *words)
  85 {
  86         struct virtex2_pld_device *virtex2_info = pld_device->driver_priv;
  87         struct scan_field scan_field;
  88
  89         scan_field.num_bits = 32;
  90         scan_field.out_value = NULL;
  91         scan_field.in_value = NULL;
  92
  93         virtex2_set_instr(virtex2_info->tap, 0x4); /* CFG_OUT */
  94
  95         while (num_words--)
  96         {
  97                 scan_field.in_value = (uint8_t *)words;
  98
  99                 jtag_add_dr_scan(virtex2_info->tap, 1, &scan_field, jtag_set_end_state(TAP_DRPAUSE));
 100
 101                 jtag_add_callback(virtexflip32, (jtag_callback_data_t)words);
 102
 103                 words++;;
 104         }
 105
 106         return ERROR_OK;
 107 }
 108
 109 static int virtex2_read_stat(struct pld_device *pld_device, uint32_t *status)
 110 {
 111         uint32_t data[5];
 112
 113         jtag_add_tlr();
 114
 115         data[0] = 0xaa995566; /* synch word */
 116         data[1] = 0x2800E001; /* Type 1, read, address 7, 1 word */
 117         data[2] = 0x20000000; /* NOOP (Type 1, read, address 0, 0 words */
 118         data[3] = 0x20000000; /* NOOP */
 119         data[4] = 0x20000000; /* NOOP */
 120         virtex2_send_32(pld_device, 5, data);
 121
 122         virtex2_receive_32(pld_device, 1, status);
 123
 124         jtag_execute_queue();
 125
 126         LOG_DEBUG("status: 0x%8.8" PRIx32 "", *status);
 127
 128         return ERROR_OK;
 129 }
 130
 131 static int virtex2_load(struct pld_device *pld_device, const char *filename)
 132 {
 133         struct virtex2_pld_device *virtex2_info = pld_device->driver_priv;
 134         struct xilinx_bit_file bit_file;
 135         int retval;
 136         unsigned int i;
 137         struct scan_field field;
 138
 139         field.in_value = NULL;
 140
 141         if ((retval = xilinx_read_bit_file(&bit_file, filename)) != ERROR_OK)
 142                 return retval;
 143
 144         jtag_set_end_state(TAP_IDLE);
 145         virtex2_set_instr(virtex2_info->tap, 0xb); /* JPROG_B */
 146         jtag_execute_queue();
 147         jtag_add_sleep(1000);
 148
 149         virtex2_set_instr(virtex2_info->tap, 0x5); /* CFG_IN */
 150         jtag_execute_queue();
 151
 152         for (i = 0; i < bit_file.length; i++)
 153                 bit_file.data[i] = flip_u32(bit_file.data[i], 8);
 154
 155         field.num_bits = bit_file.length * 8;
 156         field.out_value = bit_file.data;
 157
 158         jtag_add_dr_scan(virtex2_info->tap, 1, &field, jtag_set_end_state(TAP_DRPAUSE));
 159         jtag_execute_queue();
 160
 161         jtag_add_tlr();
 162
 163         jtag_set_end_state(TAP_IDLE);
 164         virtex2_set_instr(virtex2_info->tap, 0xc); /* JSTART */
 165         jtag_add_runtest(13, jtag_set_end_state(TAP_IDLE));
 166         virtex2_set_instr(virtex2_info->tap, 0x3f); /* BYPASS */
 167         virtex2_set_instr(virtex2_info->tap, 0x3f); /* BYPASS */
 168         virtex2_set_instr(virtex2_info->tap, 0xc); /* JSTART */
 169         jtag_add_runtest(13, jtag_set_end_state(TAP_IDLE));
 170         virtex2_set_instr(virtex2_info->tap, 0x3f); /* BYPASS */
 171         jtag_execute_queue();
 172
 173         return ERROR_OK;
 174 }
 175
 176 COMMAND_HANDLER(virtex2_handle_read_stat_command)
 177 {
 178         struct pld_device *device;
 179         struct virtex2_pld_device *virtex2_info;
 180         uint32_t status;
 181
 182         if (CMD_ARGC < 1)
 183         {
 184                 command_print(CMD_CTX, "usage: virtex2 read_stat <num>");
 185                 return ERROR_OK;
 186         }
 187
 188         unsigned dev_id;
 189         COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], dev_id);
 190         device = get_pld_device_by_num(dev_id);
 191         if (!device)
 192         {
 193                 command_print(CMD_CTX, "pld device '#%s' is out of bounds", CMD_ARGV[0]);
 194                 return ERROR_OK;
 195         }
 196
 197         virtex2_info = device->driver_priv;
 198
 199         virtex2_read_stat(device, &status);
 200
 201         command_print(CMD_CTX, "virtex2 status register: 0x%8.8" PRIx32 "", status);
 202
 203         return ERROR_OK;
 204 }
 205
 206 PLD_DEVICE_COMMAND_HANDLER(virtex2_pld_device_command)
 207 {
 208         struct jtag_tap *tap;
 209
 210         struct virtex2_pld_device *virtex2_info;
 211
 212         if (CMD_ARGC < 2)
 213         {
 214                 LOG_WARNING("incomplete pld device 'virtex2' configuration");
 215                 return ERROR_PLD_DEVICE_INVALID;
 216         }
 217
 218         tap = jtag_tap_by_string(CMD_ARGV[1]);
 219         if (tap == NULL) {
 220                 command_print(CMD_CTX, "Tap: %s does not exist", CMD_ARGV[1]);
 221                 return ERROR_OK;
 222         }
 223
 224         virtex2_info = malloc(sizeof(struct virtex2_pld_device));
 225         virtex2_info->tap = tap;
 226
 227         pld->driver_priv = virtex2_info;
 228
 229         return ERROR_OK;
 230 }
 231
 232 static const struct command_registration virtex2_exec_command_handlers[] = {
 233         {
 234                 .name = "read_stat",
 235                 .mode = COMMAND_EXEC,
 236                 .handler = virtex2_handle_read_stat_command,
 237                 .help = "read status register",
 238                 .usage = "pld_num",
 239         },
 240         COMMAND_REGISTRATION_DONE
 241 };
 242 static const struct command_registration virtex2_command_handler[] = {
 243         {
 244                 .name = "virtex2",
 245                 .mode = COMMAND_ANY,
 246                 .help = "Virtex-II specific commands",
 247                 .chain = virtex2_exec_command_handlers,
 248         },
 249         COMMAND_REGISTRATION_DONE
 250 };
 251
 252 struct pld_driver virtex2_pld = {
 253                 .name = "virtex2",
 254                 .commands = virtex2_command_handler,
 255                 .pld_device_command = &virtex2_pld_device_command,
 256                 .load = &virtex2_load,
 257         };