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  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  19  ***************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include "virtex2.h"
  26 #include "xilinx_bit.h"
  27 #include "pld.h"
  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                 struct scan_field field;
  36
  37                 field.num_bits = tap->ir_length;
  38                 void *t = calloc(DIV_ROUND_UP(field.num_bits, 8), 1);
  39                 field.out_value = t;
  40                 buf_set_u32(t, 0, field.num_bits, new_instr);
  41                 field.in_value = NULL;
  42
  43                 jtag_add_ir_scan(tap, &field, TAP_IDLE);
  44
  45                 free(t);
  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, 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 *)arg) = 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                 scan_field.in_value = (uint8_t *)words;
  97
  98                 jtag_add_dr_scan(virtex2_info->tap, 1, &scan_field, TAP_DRPAUSE);
  99
 100                 jtag_add_callback(virtexflip32, (jtag_callback_data_t)words);
 101
 102                 words++;
 103         }
 104
 105         return ERROR_OK;
 106 }
 107
 108 static int virtex2_read_stat(struct pld_device *pld_device, uint32_t *status)
 109 {
 110         uint32_t data[5];
 111
 112         jtag_add_tlr();
 113
 114         data[0] = 0xaa995566;   /* synch word */
 115         data[1] = 0x2800E001;   /* Type 1, read, address 7, 1 word */
 116         data[2] = 0x20000000;   /* NOOP (Type 1, read, address 0, 0 words */
 117         data[3] = 0x20000000;   /* NOOP */
 118         data[4] = 0x20000000;   /* NOOP */
 119         virtex2_send_32(pld_device, 5, data);
 120
 121         virtex2_receive_32(pld_device, 1, status);
 122
 123         jtag_execute_queue();
 124
 125         LOG_DEBUG("status: 0x%8.8" PRIx32 "", *status);
 126
 127         return ERROR_OK;
 128 }
 129
 130 static int virtex2_load(struct pld_device *pld_device, const char *filename)
 131 {
 132         struct virtex2_pld_device *virtex2_info = pld_device->driver_priv;
 133         struct xilinx_bit_file bit_file;
 134         int retval;
 135         unsigned int i;
 136         struct scan_field field;
 137
 138         field.in_value = NULL;
 139
 140         retval = xilinx_read_bit_file(&bit_file, filename);
 141         if (retval != ERROR_OK)
 142                 return retval;
 143
 144         virtex2_set_instr(virtex2_info->tap, 0xb);      /* JPROG_B */
 145         jtag_execute_queue();
 146         jtag_add_sleep(1000);
 147
 148         virtex2_set_instr(virtex2_info->tap, 0x5);      /* CFG_IN */
 149         jtag_execute_queue();
 150
 151         for (i = 0; i < bit_file.length; i++)
 152                 bit_file.data[i] = flip_u32(bit_file.data[i], 8);
 153
 154         field.num_bits = bit_file.length * 8;
 155         field.out_value = bit_file.data;
 156
 157         jtag_add_dr_scan(virtex2_info->tap, 1, &field, TAP_DRPAUSE);
 158         jtag_execute_queue();
 159
 160         jtag_add_tlr();
 161
 162         virtex2_set_instr(virtex2_info->tap, 0xc);      /* JSTART */
 163         jtag_add_runtest(13, TAP_IDLE);
 164         virtex2_set_instr(virtex2_info->tap, 0x3f);     /* BYPASS */
 165         virtex2_set_instr(virtex2_info->tap, 0x3f);     /* BYPASS */
 166         virtex2_set_instr(virtex2_info->tap, 0xc);      /* JSTART */
 167         jtag_add_runtest(13, TAP_IDLE);
 168         virtex2_set_instr(virtex2_info->tap, 0x3f);     /* BYPASS */
 169         jtag_execute_queue();
 170
 171         return ERROR_OK;
 172 }
 173
 174 COMMAND_HANDLER(virtex2_handle_read_stat_command)
 175 {
 176         struct pld_device *device;
 177         uint32_t status;
 178
 179         if (CMD_ARGC < 1)
 180                 return ERROR_COMMAND_SYNTAX_ERROR;
 181
 182         unsigned dev_id;
 183         COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], dev_id);
 184         device = get_pld_device_by_num(dev_id);
 185         if (!device) {
 186                 command_print(CMD_CTX, "pld device '#%s' is out of bounds", CMD_ARGV[0]);
 187                 return ERROR_OK;
 188         }
 189
 190         virtex2_read_stat(device, &status);
 191
 192         command_print(CMD_CTX, "virtex2 status register: 0x%8.8" PRIx32 "", status);
 193
 194         return ERROR_OK;
 195 }
 196
 197 PLD_DEVICE_COMMAND_HANDLER(virtex2_pld_device_command)
 198 {
 199         struct jtag_tap *tap;
 200
 201         struct virtex2_pld_device *virtex2_info;
 202
 203         if (CMD_ARGC < 2)
 204                 return ERROR_COMMAND_SYNTAX_ERROR;
 205
 206         tap = jtag_tap_by_string(CMD_ARGV[1]);
 207         if (tap == NULL) {
 208                 command_print(CMD_CTX, "Tap: %s does not exist", CMD_ARGV[1]);
 209                 return ERROR_OK;
 210         }
 211
 212         virtex2_info = malloc(sizeof(struct virtex2_pld_device));
 213         virtex2_info->tap = tap;
 214
 215         pld->driver_priv = virtex2_info;
 216
 217         return ERROR_OK;
 218 }
 219
 220 static const struct command_registration virtex2_exec_command_handlers[] = {
 221         {
 222                 .name = "read_stat",
 223                 .mode = COMMAND_EXEC,
 224                 .handler = virtex2_handle_read_stat_command,
 225                 .help = "read status register",
 226                 .usage = "pld_num",
 227         },
 228         COMMAND_REGISTRATION_DONE
 229 };
 230 static const struct command_registration virtex2_command_handler[] = {
 231         {
 232                 .name = "virtex2",
 233                 .mode = COMMAND_ANY,
 234                 .help = "Virtex-II specific commands",
 235                 .usage = "",
 236                 .chain = virtex2_exec_command_handlers,
 237         },
 238         COMMAND_REGISTRATION_DONE
 239 };
 240
 241 struct pld_driver virtex2_pld = {
 242         .name = "virtex2",
 243         .commands = virtex2_command_handler,
 244         .pld_device_command = &virtex2_pld_device_command,
 245         .load = &virtex2_load,
 246 };