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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, 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, 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, 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         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         struct virtex2_pld_device *virtex2_info;
 178         uint32_t status;
 179
 180         if (CMD_ARGC < 1)
 181         {
 182                 command_print(CMD_CTX, "usage: virtex2 read_stat <num>");
 183                 return ERROR_OK;
 184         }
 185
 186         unsigned dev_id;
 187         COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], dev_id);
 188         device = get_pld_device_by_num(dev_id);
 189         if (!device)
 190         {
 191                 command_print(CMD_CTX, "pld device '#%s' is out of bounds", CMD_ARGV[0]);
 192                 return ERROR_OK;
 193         }
 194
 195         virtex2_info = device->driver_priv;
 196
 197         virtex2_read_stat(device, &status);
 198
 199         command_print(CMD_CTX, "virtex2 status register: 0x%8.8" PRIx32 "", status);
 200
 201         return ERROR_OK;
 202 }
 203
 204 PLD_DEVICE_COMMAND_HANDLER(virtex2_pld_device_command)
 205 {
 206         struct jtag_tap *tap;
 207
 208         struct virtex2_pld_device *virtex2_info;
 209
 210         if (CMD_ARGC < 2)
 211         {
 212                 LOG_WARNING("incomplete pld device 'virtex2' configuration");
 213                 return ERROR_PLD_DEVICE_INVALID;
 214         }
 215
 216         tap = jtag_tap_by_string(CMD_ARGV[1]);
 217         if (tap == NULL) {
 218                 command_print(CMD_CTX, "Tap: %s does not exist", CMD_ARGV[1]);
 219                 return ERROR_OK;
 220         }
 221
 222         virtex2_info = malloc(sizeof(struct virtex2_pld_device));
 223         virtex2_info->tap = tap;
 224
 225         pld->driver_priv = virtex2_info;
 226
 227         return ERROR_OK;
 228 }
 229
 230 static const struct command_registration virtex2_exec_command_handlers[] = {
 231         {
 232                 .name = "read_stat",
 233                 .mode = COMMAND_EXEC,
 234                 .handler = virtex2_handle_read_stat_command,
 235                 .help = "read status register",
 236                 .usage = "pld_num",
 237         },
 238         COMMAND_REGISTRATION_DONE
 239 };
 240 static const struct command_registration virtex2_command_handler[] = {
 241         {
 242                 .name = "virtex2",
 243                 .mode = COMMAND_ANY,
 244                 .help = "Virtex-II specific commands",
 245                 .chain = virtex2_exec_command_handlers,
 246         },
 247         COMMAND_REGISTRATION_DONE
 248 };
 249
 250 struct pld_driver virtex2_pld = {
 251                 .name = "virtex2",
 252                 .commands = virtex2_command_handler,
 253                 .pld_device_command = &virtex2_pld_device_command,
 254                 .load = &virtex2_load,
 255         };