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