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_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.tap = tap;
  39                 field.num_bits = tap->ir_length;
  40                 field.out_value = calloc(DIV_ROUND_UP(field.num_bits, 8), 1);
  41                 buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
  42                 field.in_value = NULL;
  43
  44                 jtag_add_ir_scan(1, &field, jtag_set_end_state(TAP_IDLE));
  45
  46                 free(field.out_value);
  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.tap = virtex2_info->tap;
  63         scan_field.num_bits = num_words * 32;
  64         scan_field.out_value = values;
  65         scan_field.in_value = NULL;
  66
  67         for (i = 0; i < num_words; i++)
  68                 buf_set_u32(values + 4 * i, 0, 32, flip_u32(*words++, 32));
  69
  70         virtex2_set_instr(virtex2_info->tap, 0x5); /* CFG_IN */
  71
  72         jtag_add_dr_scan(1, &scan_field, jtag_set_end_state(TAP_DRPAUSE));
  73
  74         free(values);
  75
  76         return ERROR_OK;
  77 }
  78
  79 static __inline__ void virtexflip32(jtag_callback_data_t arg)
  80 {
  81   uint8_t *in = (uint8_t *)arg;
  82         *((uint32_t *)in) = flip_u32(le_to_h_u32(in), 32);
  83 }
  84
  85 static int virtex2_receive_32(struct pld_device *pld_device,
  86                 int num_words, uint32_t *words)
  87 {
  88         struct virtex2_pld_device *virtex2_info = pld_device->driver_priv;
  89         struct scan_field scan_field;
  90
  91         scan_field.tap = virtex2_info->tap;
  92         scan_field.num_bits = 32;
  93         scan_field.out_value = NULL;
  94         scan_field.in_value = NULL;
  95
  96         virtex2_set_instr(virtex2_info->tap, 0x4); /* CFG_OUT */
  97
  98         while (num_words--)
  99         {
 100                 scan_field.in_value = (uint8_t *)words;
 101
 102                 jtag_add_dr_scan(1, &scan_field, jtag_set_end_state(TAP_DRPAUSE));
 103
 104                 jtag_add_callback(virtexflip32, (jtag_callback_data_t)words);
 105
 106                 words++;;
 107         }
 108
 109         return ERROR_OK;
 110 }
 111
 112 static int virtex2_read_stat(struct pld_device *pld_device, uint32_t *status)
 113 {
 114         uint32_t data[5];
 115
 116         jtag_add_tlr();
 117
 118         data[0] = 0xaa995566; /* synch word */
 119         data[1] = 0x2800E001; /* Type 1, read, address 7, 1 word */
 120         data[2] = 0x20000000; /* NOOP (Type 1, read, address 0, 0 words */
 121         data[3] = 0x20000000; /* NOOP */
 122         data[4] = 0x20000000; /* NOOP */
 123         virtex2_send_32(pld_device, 5, data);
 124
 125         virtex2_receive_32(pld_device, 1, status);
 126
 127         jtag_execute_queue();
 128
 129         LOG_DEBUG("status: 0x%8.8" PRIx32 "", *status);
 130
 131         return ERROR_OK;
 132 }
 133
 134 static int virtex2_load(struct pld_device *pld_device, const char *filename)
 135 {
 136         struct virtex2_pld_device *virtex2_info = pld_device->driver_priv;
 137         struct xilinx_bit_file bit_file;
 138         int retval;
 139         unsigned int i;
 140         struct scan_field field;
 141
 142         field.tap = virtex2_info->tap;
 143         field.in_value = NULL;
 144
 145         if ((retval = xilinx_read_bit_file(&bit_file, filename)) != ERROR_OK)
 146                 return retval;
 147
 148         jtag_set_end_state(TAP_IDLE);
 149         virtex2_set_instr(virtex2_info->tap, 0xb); /* JPROG_B */
 150         jtag_execute_queue();
 151         jtag_add_sleep(1000);
 152
 153         virtex2_set_instr(virtex2_info->tap, 0x5); /* CFG_IN */
 154         jtag_execute_queue();
 155
 156         for (i = 0; i < bit_file.length; i++)
 157                 bit_file.data[i] = flip_u32(bit_file.data[i], 8);
 158
 159         field.num_bits = bit_file.length * 8;
 160         field.out_value = bit_file.data;
 161
 162         jtag_add_dr_scan(1, &field, jtag_set_end_state(TAP_DRPAUSE));
 163         jtag_execute_queue();
 164
 165         jtag_add_tlr();
 166
 167         jtag_set_end_state(TAP_IDLE);
 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         virtex2_set_instr(virtex2_info->tap, 0x3f); /* BYPASS */
 172         virtex2_set_instr(virtex2_info->tap, 0xc); /* JSTART */
 173         jtag_add_runtest(13, jtag_set_end_state(TAP_IDLE));
 174         virtex2_set_instr(virtex2_info->tap, 0x3f); /* BYPASS */
 175         jtag_execute_queue();
 176
 177         return ERROR_OK;
 178 }
 179
 180 COMMAND_HANDLER(virtex2_handle_read_stat_command)
 181 {
 182         struct pld_device *device;
 183         struct virtex2_pld_device *virtex2_info;
 184         uint32_t status;
 185
 186         if (CMD_ARGC < 1)
 187         {
 188                 command_print(cmd_ctx, "usage: virtex2 read_stat <num>");
 189                 return ERROR_OK;
 190         }
 191
 192         unsigned dev_id;
 193         COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], dev_id);
 194         device = get_pld_device_by_num(dev_id);
 195         if (!device)
 196         {
 197                 command_print(cmd_ctx, "pld device '#%s' is out of bounds", CMD_ARGV[0]);
 198                 return ERROR_OK;
 199         }
 200
 201         virtex2_info = device->driver_priv;
 202
 203         virtex2_read_stat(device, &status);
 204
 205         command_print(cmd_ctx, "virtex2 status register: 0x%8.8" PRIx32 "", status);
 206
 207         return ERROR_OK;
 208 }
 209
 210 PLD_DEVICE_COMMAND_HANDLER(virtex2_pld_device_command)
 211 {
 212         struct jtag_tap *tap;
 213
 214         struct virtex2_pld_device *virtex2_info;
 215
 216         if (CMD_ARGC < 2)
 217         {
 218                 LOG_WARNING("incomplete pld device 'virtex2' configuration");
 219                 return ERROR_PLD_DEVICE_INVALID;
 220         }
 221
 222         tap = jtag_tap_by_string(CMD_ARGV[1]);
 223         if (tap == NULL) {
 224                 command_print(cmd_ctx, "Tap: %s does not exist", CMD_ARGV[1]);
 225                 return ERROR_OK;
 226         }
 227
 228         virtex2_info = malloc(sizeof(struct virtex2_pld_device));
 229         virtex2_info->tap = tap;
 230
 231         pld->driver_priv = virtex2_info;
 232
 233         return ERROR_OK;
 234 }
 235
 236 static int virtex2_register_commands(struct command_context *cmd_ctx)
 237 {
 238         struct command *virtex2_cmd = register_command(cmd_ctx, NULL, "virtex2",
 239                         NULL, COMMAND_ANY, "virtex2 specific commands");
 240
 241         register_command(cmd_ctx, virtex2_cmd, "read_stat",
 242                         &virtex2_handle_read_stat_command, COMMAND_EXEC,
 243                         "read Virtex-II status register");
 244
 245         return ERROR_OK;
 246 }
 247
 248 struct pld_driver virtex2_pld = {
 249                 .name = "virtex2",
 250                 .register_commands = &virtex2_register_commands,
 251                 .pld_device_command = &virtex2_pld_device_command,
 252                 .load = &virtex2_load,
 253         };