Igor M. Liplianin | fa766c9 | 2011-01-25 17:00:00 -0300 | [diff] [blame] | 1 | /* |
| 2 | * altera-jtag.c |
| 3 | * |
| 4 | * altera FPGA driver |
| 5 | * |
| 6 | * Copyright (C) Altera Corporation 1998-2001 |
| 7 | * Copyright (C) 2010 NetUP Inc. |
| 8 | * Copyright (C) 2010 Igor M. Liplianin <liplianin@netup.ru> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 24 | */ |
| 25 | |
Randy Dunlap | 92ce526 | 2011-03-28 12:23:05 -0300 | [diff] [blame] | 26 | #include <linux/delay.h> |
Igor M. Liplianin | fa766c9 | 2011-01-25 17:00:00 -0300 | [diff] [blame] | 27 | #include <linux/firmware.h> |
| 28 | #include <linux/slab.h> |
Igor M. Liplianin | cff4fa8 | 2011-09-23 11:17:41 -0300 | [diff] [blame] | 29 | #include <misc/altera.h> |
Igor M. Liplianin | fa766c9 | 2011-01-25 17:00:00 -0300 | [diff] [blame] | 30 | #include "altera-exprt.h" |
| 31 | #include "altera-jtag.h" |
| 32 | |
| 33 | #define alt_jtag_io(a, b, c)\ |
| 34 | astate->config->jtag_io(astate->config->dev, a, b, c); |
| 35 | |
| 36 | #define alt_malloc(a) kzalloc(a, GFP_KERNEL); |
| 37 | |
| 38 | /* |
| 39 | * This structure shows, for each JTAG state, which state is reached after |
| 40 | * a single TCK clock cycle with TMS high or TMS low, respectively. This |
| 41 | * describes all possible state transitions in the JTAG state machine. |
| 42 | */ |
| 43 | struct altera_jtag_machine { |
| 44 | enum altera_jtag_state tms_high; |
| 45 | enum altera_jtag_state tms_low; |
| 46 | }; |
| 47 | |
| 48 | static const struct altera_jtag_machine altera_transitions[] = { |
| 49 | /* RESET */ { RESET, IDLE }, |
| 50 | /* IDLE */ { DRSELECT, IDLE }, |
| 51 | /* DRSELECT */ { IRSELECT, DRCAPTURE }, |
| 52 | /* DRCAPTURE */ { DREXIT1, DRSHIFT }, |
| 53 | /* DRSHIFT */ { DREXIT1, DRSHIFT }, |
| 54 | /* DREXIT1 */ { DRUPDATE, DRPAUSE }, |
| 55 | /* DRPAUSE */ { DREXIT2, DRPAUSE }, |
| 56 | /* DREXIT2 */ { DRUPDATE, DRSHIFT }, |
| 57 | /* DRUPDATE */ { DRSELECT, IDLE }, |
| 58 | /* IRSELECT */ { RESET, IRCAPTURE }, |
| 59 | /* IRCAPTURE */ { IREXIT1, IRSHIFT }, |
| 60 | /* IRSHIFT */ { IREXIT1, IRSHIFT }, |
| 61 | /* IREXIT1 */ { IRUPDATE, IRPAUSE }, |
| 62 | /* IRPAUSE */ { IREXIT2, IRPAUSE }, |
| 63 | /* IREXIT2 */ { IRUPDATE, IRSHIFT }, |
| 64 | /* IRUPDATE */ { DRSELECT, IDLE } |
| 65 | }; |
| 66 | |
| 67 | /* |
| 68 | * This table contains the TMS value to be used to take the NEXT STEP on |
| 69 | * the path to the desired state. The array index is the current state, |
| 70 | * and the bit position is the desired endstate. To find out which state |
| 71 | * is used as the intermediate state, look up the TMS value in the |
| 72 | * altera_transitions[] table. |
| 73 | */ |
| 74 | static const u16 altera_jtag_path_map[16] = { |
| 75 | /* RST RTI SDRS CDR SDR E1DR PDR E2DR */ |
| 76 | 0x0001, 0xFFFD, 0xFE01, 0xFFE7, 0xFFEF, 0xFF0F, 0xFFBF, 0xFFFF, |
| 77 | /* UDR SIRS CIR SIR E1IR PIR E2IR UIR */ |
| 78 | 0xFEFD, 0x0001, 0xF3FF, 0xF7FF, 0x87FF, 0xDFFF, 0xFFFF, 0x7FFD |
| 79 | }; |
| 80 | |
| 81 | /* Flag bits for alt_jtag_io() function */ |
| 82 | #define TMS_HIGH 1 |
| 83 | #define TMS_LOW 0 |
| 84 | #define TDI_HIGH 1 |
| 85 | #define TDI_LOW 0 |
| 86 | #define READ_TDO 1 |
| 87 | #define IGNORE_TDO 0 |
| 88 | |
| 89 | int altera_jinit(struct altera_state *astate) |
| 90 | { |
| 91 | struct altera_jtag *js = &astate->js; |
| 92 | |
| 93 | /* initial JTAG state is unknown */ |
| 94 | js->jtag_state = ILLEGAL_JTAG_STATE; |
| 95 | |
| 96 | /* initialize to default state */ |
| 97 | js->drstop_state = IDLE; |
| 98 | js->irstop_state = IDLE; |
| 99 | js->dr_pre = 0; |
| 100 | js->dr_post = 0; |
| 101 | js->ir_pre = 0; |
| 102 | js->ir_post = 0; |
| 103 | js->dr_length = 0; |
| 104 | js->ir_length = 0; |
| 105 | |
| 106 | js->dr_pre_data = NULL; |
| 107 | js->dr_post_data = NULL; |
| 108 | js->ir_pre_data = NULL; |
| 109 | js->ir_post_data = NULL; |
| 110 | js->dr_buffer = NULL; |
| 111 | js->ir_buffer = NULL; |
| 112 | |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | int altera_set_drstop(struct altera_jtag *js, enum altera_jtag_state state) |
| 117 | { |
| 118 | js->drstop_state = state; |
| 119 | |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | int altera_set_irstop(struct altera_jtag *js, enum altera_jtag_state state) |
| 124 | { |
| 125 | js->irstop_state = state; |
| 126 | |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | int altera_set_dr_pre(struct altera_jtag *js, |
| 131 | u32 count, u32 start_index, |
| 132 | u8 *preamble_data) |
| 133 | { |
| 134 | int status = 0; |
| 135 | u32 i; |
| 136 | u32 j; |
| 137 | |
| 138 | if (count > js->dr_pre) { |
| 139 | kfree(js->dr_pre_data); |
| 140 | js->dr_pre_data = (u8 *)alt_malloc((count + 7) >> 3); |
| 141 | if (js->dr_pre_data == NULL) |
| 142 | status = -ENOMEM; |
| 143 | else |
| 144 | js->dr_pre = count; |
| 145 | } else |
| 146 | js->dr_pre = count; |
| 147 | |
| 148 | if (status == 0) { |
| 149 | for (i = 0; i < count; ++i) { |
| 150 | j = i + start_index; |
| 151 | |
| 152 | if (preamble_data == NULL) |
| 153 | js->dr_pre_data[i >> 3] |= (1 << (i & 7)); |
| 154 | else { |
| 155 | if (preamble_data[j >> 3] & (1 << (j & 7))) |
| 156 | js->dr_pre_data[i >> 3] |= |
| 157 | (1 << (i & 7)); |
| 158 | else |
| 159 | js->dr_pre_data[i >> 3] &= |
| 160 | ~(u32)(1 << (i & 7)); |
| 161 | |
| 162 | } |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | return status; |
| 167 | } |
| 168 | |
| 169 | int altera_set_ir_pre(struct altera_jtag *js, u32 count, u32 start_index, |
| 170 | u8 *preamble_data) |
| 171 | { |
| 172 | int status = 0; |
| 173 | u32 i; |
| 174 | u32 j; |
| 175 | |
| 176 | if (count > js->ir_pre) { |
| 177 | kfree(js->ir_pre_data); |
| 178 | js->ir_pre_data = (u8 *)alt_malloc((count + 7) >> 3); |
| 179 | if (js->ir_pre_data == NULL) |
| 180 | status = -ENOMEM; |
| 181 | else |
| 182 | js->ir_pre = count; |
| 183 | |
| 184 | } else |
| 185 | js->ir_pre = count; |
| 186 | |
| 187 | if (status == 0) { |
| 188 | for (i = 0; i < count; ++i) { |
| 189 | j = i + start_index; |
| 190 | if (preamble_data == NULL) |
| 191 | js->ir_pre_data[i >> 3] |= (1 << (i & 7)); |
| 192 | else { |
| 193 | if (preamble_data[j >> 3] & (1 << (j & 7))) |
| 194 | js->ir_pre_data[i >> 3] |= |
| 195 | (1 << (i & 7)); |
| 196 | else |
| 197 | js->ir_pre_data[i >> 3] &= |
| 198 | ~(u32)(1 << (i & 7)); |
| 199 | |
| 200 | } |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | return status; |
| 205 | } |
| 206 | |
| 207 | int altera_set_dr_post(struct altera_jtag *js, u32 count, u32 start_index, |
| 208 | u8 *postamble_data) |
| 209 | { |
| 210 | int status = 0; |
| 211 | u32 i; |
| 212 | u32 j; |
| 213 | |
| 214 | if (count > js->dr_post) { |
| 215 | kfree(js->dr_post_data); |
| 216 | js->dr_post_data = (u8 *)alt_malloc((count + 7) >> 3); |
| 217 | |
| 218 | if (js->dr_post_data == NULL) |
| 219 | status = -ENOMEM; |
| 220 | else |
| 221 | js->dr_post = count; |
| 222 | |
| 223 | } else |
| 224 | js->dr_post = count; |
| 225 | |
| 226 | if (status == 0) { |
| 227 | for (i = 0; i < count; ++i) { |
| 228 | j = i + start_index; |
| 229 | |
| 230 | if (postamble_data == NULL) |
| 231 | js->dr_post_data[i >> 3] |= (1 << (i & 7)); |
| 232 | else { |
| 233 | if (postamble_data[j >> 3] & (1 << (j & 7))) |
| 234 | js->dr_post_data[i >> 3] |= |
| 235 | (1 << (i & 7)); |
| 236 | else |
| 237 | js->dr_post_data[i >> 3] &= |
| 238 | ~(u32)(1 << (i & 7)); |
| 239 | |
| 240 | } |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | return status; |
| 245 | } |
| 246 | |
| 247 | int altera_set_ir_post(struct altera_jtag *js, u32 count, u32 start_index, |
| 248 | u8 *postamble_data) |
| 249 | { |
| 250 | int status = 0; |
| 251 | u32 i; |
| 252 | u32 j; |
| 253 | |
| 254 | if (count > js->ir_post) { |
| 255 | kfree(js->ir_post_data); |
| 256 | js->ir_post_data = (u8 *)alt_malloc((count + 7) >> 3); |
| 257 | if (js->ir_post_data == NULL) |
| 258 | status = -ENOMEM; |
| 259 | else |
| 260 | js->ir_post = count; |
| 261 | |
| 262 | } else |
| 263 | js->ir_post = count; |
| 264 | |
| 265 | if (status != 0) |
| 266 | return status; |
| 267 | |
| 268 | for (i = 0; i < count; ++i) { |
| 269 | j = i + start_index; |
| 270 | |
| 271 | if (postamble_data == NULL) |
| 272 | js->ir_post_data[i >> 3] |= (1 << (i & 7)); |
| 273 | else { |
| 274 | if (postamble_data[j >> 3] & (1 << (j & 7))) |
| 275 | js->ir_post_data[i >> 3] |= (1 << (i & 7)); |
| 276 | else |
| 277 | js->ir_post_data[i >> 3] &= |
| 278 | ~(u32)(1 << (i & 7)); |
| 279 | |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | return status; |
| 284 | } |
| 285 | |
| 286 | static void altera_jreset_idle(struct altera_state *astate) |
| 287 | { |
| 288 | struct altera_jtag *js = &astate->js; |
| 289 | int i; |
| 290 | /* Go to Test Logic Reset (no matter what the starting state may be) */ |
| 291 | for (i = 0; i < 5; ++i) |
| 292 | alt_jtag_io(TMS_HIGH, TDI_LOW, IGNORE_TDO); |
| 293 | |
| 294 | /* Now step to Run Test / Idle */ |
| 295 | alt_jtag_io(TMS_LOW, TDI_LOW, IGNORE_TDO); |
| 296 | js->jtag_state = IDLE; |
| 297 | } |
| 298 | |
| 299 | int altera_goto_jstate(struct altera_state *astate, |
| 300 | enum altera_jtag_state state) |
| 301 | { |
| 302 | struct altera_jtag *js = &astate->js; |
| 303 | int tms; |
| 304 | int count = 0; |
| 305 | int status = 0; |
| 306 | |
| 307 | if (js->jtag_state == ILLEGAL_JTAG_STATE) |
| 308 | /* initialize JTAG chain to known state */ |
| 309 | altera_jreset_idle(astate); |
| 310 | |
| 311 | if (js->jtag_state == state) { |
| 312 | /* |
| 313 | * We are already in the desired state. |
| 314 | * If it is a stable state, loop here. |
| 315 | * Otherwise do nothing (no clock cycles). |
| 316 | */ |
| 317 | if ((state == IDLE) || (state == DRSHIFT) || |
| 318 | (state == DRPAUSE) || (state == IRSHIFT) || |
| 319 | (state == IRPAUSE)) { |
| 320 | alt_jtag_io(TMS_LOW, TDI_LOW, IGNORE_TDO); |
| 321 | } else if (state == RESET) |
| 322 | alt_jtag_io(TMS_HIGH, TDI_LOW, IGNORE_TDO); |
| 323 | |
| 324 | } else { |
| 325 | while ((js->jtag_state != state) && (count < 9)) { |
| 326 | /* Get TMS value to take a step toward desired state */ |
| 327 | tms = (altera_jtag_path_map[js->jtag_state] & |
| 328 | (1 << state)) |
| 329 | ? TMS_HIGH : TMS_LOW; |
| 330 | |
| 331 | /* Take a step */ |
| 332 | alt_jtag_io(tms, TDI_LOW, IGNORE_TDO); |
| 333 | |
| 334 | if (tms) |
| 335 | js->jtag_state = |
| 336 | altera_transitions[js->jtag_state].tms_high; |
| 337 | else |
| 338 | js->jtag_state = |
| 339 | altera_transitions[js->jtag_state].tms_low; |
| 340 | |
| 341 | ++count; |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | if (js->jtag_state != state) |
| 346 | status = -EREMOTEIO; |
| 347 | |
| 348 | return status; |
| 349 | } |
| 350 | |
| 351 | int altera_wait_cycles(struct altera_state *astate, |
| 352 | s32 cycles, |
| 353 | enum altera_jtag_state wait_state) |
| 354 | { |
| 355 | struct altera_jtag *js = &astate->js; |
| 356 | int tms; |
| 357 | s32 count; |
| 358 | int status = 0; |
| 359 | |
| 360 | if (js->jtag_state != wait_state) |
| 361 | status = altera_goto_jstate(astate, wait_state); |
| 362 | |
| 363 | if (status == 0) { |
| 364 | /* |
| 365 | * Set TMS high to loop in RESET state |
| 366 | * Set TMS low to loop in any other stable state |
| 367 | */ |
| 368 | tms = (wait_state == RESET) ? TMS_HIGH : TMS_LOW; |
| 369 | |
| 370 | for (count = 0L; count < cycles; count++) |
| 371 | alt_jtag_io(tms, TDI_LOW, IGNORE_TDO); |
| 372 | |
| 373 | } |
| 374 | |
| 375 | return status; |
| 376 | } |
| 377 | |
| 378 | int altera_wait_msecs(struct altera_state *astate, |
| 379 | s32 microseconds, enum altera_jtag_state wait_state) |
| 380 | /* |
| 381 | * Causes JTAG hardware to sit in the specified stable |
| 382 | * state for the specified duration of real time. If |
| 383 | * no JTAG operations have been performed yet, then only |
| 384 | * a delay is performed. This permits the WAIT USECS |
| 385 | * statement to be used in VECTOR programs without causing |
| 386 | * any JTAG operations. |
| 387 | * Returns 0 for success, else appropriate error code. |
| 388 | */ |
| 389 | { |
| 390 | struct altera_jtag *js = &astate->js; |
| 391 | int status = 0; |
| 392 | |
| 393 | if ((js->jtag_state != ILLEGAL_JTAG_STATE) && |
| 394 | (js->jtag_state != wait_state)) |
| 395 | status = altera_goto_jstate(astate, wait_state); |
| 396 | |
| 397 | if (status == 0) |
| 398 | /* Wait for specified time interval */ |
| 399 | udelay(microseconds); |
| 400 | |
| 401 | return status; |
| 402 | } |
| 403 | |
| 404 | static void altera_concatenate_data(u8 *buffer, |
| 405 | u8 *preamble_data, |
| 406 | u32 preamble_count, |
| 407 | u8 *target_data, |
| 408 | u32 start_index, |
| 409 | u32 target_count, |
| 410 | u8 *postamble_data, |
| 411 | u32 postamble_count) |
| 412 | /* |
| 413 | * Copies preamble data, target data, and postamble data |
| 414 | * into one buffer for IR or DR scans. |
| 415 | */ |
| 416 | { |
| 417 | u32 i, j, k; |
| 418 | |
| 419 | for (i = 0L; i < preamble_count; ++i) { |
| 420 | if (preamble_data[i >> 3L] & (1L << (i & 7L))) |
| 421 | buffer[i >> 3L] |= (1L << (i & 7L)); |
| 422 | else |
| 423 | buffer[i >> 3L] &= ~(u32)(1L << (i & 7L)); |
| 424 | |
| 425 | } |
| 426 | |
| 427 | j = start_index; |
| 428 | k = preamble_count + target_count; |
| 429 | for (; i < k; ++i, ++j) { |
| 430 | if (target_data[j >> 3L] & (1L << (j & 7L))) |
| 431 | buffer[i >> 3L] |= (1L << (i & 7L)); |
| 432 | else |
| 433 | buffer[i >> 3L] &= ~(u32)(1L << (i & 7L)); |
| 434 | |
| 435 | } |
| 436 | |
| 437 | j = 0L; |
| 438 | k = preamble_count + target_count + postamble_count; |
| 439 | for (; i < k; ++i, ++j) { |
| 440 | if (postamble_data[j >> 3L] & (1L << (j & 7L))) |
| 441 | buffer[i >> 3L] |= (1L << (i & 7L)); |
| 442 | else |
| 443 | buffer[i >> 3L] &= ~(u32)(1L << (i & 7L)); |
| 444 | |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | static int alt_jtag_drscan(struct altera_state *astate, |
| 449 | int start_state, |
| 450 | int count, |
| 451 | u8 *tdi, |
| 452 | u8 *tdo) |
| 453 | { |
| 454 | int i = 0; |
| 455 | int tdo_bit = 0; |
| 456 | int status = 1; |
| 457 | |
| 458 | /* First go to DRSHIFT state */ |
| 459 | switch (start_state) { |
| 460 | case 0: /* IDLE */ |
| 461 | alt_jtag_io(1, 0, 0); /* DRSELECT */ |
| 462 | alt_jtag_io(0, 0, 0); /* DRCAPTURE */ |
| 463 | alt_jtag_io(0, 0, 0); /* DRSHIFT */ |
| 464 | break; |
| 465 | |
| 466 | case 1: /* DRPAUSE */ |
| 467 | alt_jtag_io(1, 0, 0); /* DREXIT2 */ |
| 468 | alt_jtag_io(1, 0, 0); /* DRUPDATE */ |
| 469 | alt_jtag_io(1, 0, 0); /* DRSELECT */ |
| 470 | alt_jtag_io(0, 0, 0); /* DRCAPTURE */ |
| 471 | alt_jtag_io(0, 0, 0); /* DRSHIFT */ |
| 472 | break; |
| 473 | |
| 474 | case 2: /* IRPAUSE */ |
| 475 | alt_jtag_io(1, 0, 0); /* IREXIT2 */ |
| 476 | alt_jtag_io(1, 0, 0); /* IRUPDATE */ |
| 477 | alt_jtag_io(1, 0, 0); /* DRSELECT */ |
| 478 | alt_jtag_io(0, 0, 0); /* DRCAPTURE */ |
| 479 | alt_jtag_io(0, 0, 0); /* DRSHIFT */ |
| 480 | break; |
| 481 | |
| 482 | default: |
| 483 | status = 0; |
| 484 | } |
| 485 | |
| 486 | if (status) { |
| 487 | /* loop in the SHIFT-DR state */ |
| 488 | for (i = 0; i < count; i++) { |
| 489 | tdo_bit = alt_jtag_io( |
| 490 | (i == count - 1), |
| 491 | tdi[i >> 3] & (1 << (i & 7)), |
| 492 | (tdo != NULL)); |
| 493 | |
| 494 | if (tdo != NULL) { |
| 495 | if (tdo_bit) |
| 496 | tdo[i >> 3] |= (1 << (i & 7)); |
| 497 | else |
| 498 | tdo[i >> 3] &= ~(u32)(1 << (i & 7)); |
| 499 | |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | alt_jtag_io(0, 0, 0); /* DRPAUSE */ |
| 504 | } |
| 505 | |
| 506 | return status; |
| 507 | } |
| 508 | |
| 509 | static int alt_jtag_irscan(struct altera_state *astate, |
| 510 | int start_state, |
| 511 | int count, |
| 512 | u8 *tdi, |
| 513 | u8 *tdo) |
| 514 | { |
| 515 | int i = 0; |
| 516 | int tdo_bit = 0; |
| 517 | int status = 1; |
| 518 | |
| 519 | /* First go to IRSHIFT state */ |
| 520 | switch (start_state) { |
| 521 | case 0: /* IDLE */ |
| 522 | alt_jtag_io(1, 0, 0); /* DRSELECT */ |
| 523 | alt_jtag_io(1, 0, 0); /* IRSELECT */ |
| 524 | alt_jtag_io(0, 0, 0); /* IRCAPTURE */ |
| 525 | alt_jtag_io(0, 0, 0); /* IRSHIFT */ |
| 526 | break; |
| 527 | |
| 528 | case 1: /* DRPAUSE */ |
| 529 | alt_jtag_io(1, 0, 0); /* DREXIT2 */ |
| 530 | alt_jtag_io(1, 0, 0); /* DRUPDATE */ |
| 531 | alt_jtag_io(1, 0, 0); /* DRSELECT */ |
| 532 | alt_jtag_io(1, 0, 0); /* IRSELECT */ |
| 533 | alt_jtag_io(0, 0, 0); /* IRCAPTURE */ |
| 534 | alt_jtag_io(0, 0, 0); /* IRSHIFT */ |
| 535 | break; |
| 536 | |
| 537 | case 2: /* IRPAUSE */ |
| 538 | alt_jtag_io(1, 0, 0); /* IREXIT2 */ |
| 539 | alt_jtag_io(1, 0, 0); /* IRUPDATE */ |
| 540 | alt_jtag_io(1, 0, 0); /* DRSELECT */ |
| 541 | alt_jtag_io(1, 0, 0); /* IRSELECT */ |
| 542 | alt_jtag_io(0, 0, 0); /* IRCAPTURE */ |
| 543 | alt_jtag_io(0, 0, 0); /* IRSHIFT */ |
| 544 | break; |
| 545 | |
| 546 | default: |
| 547 | status = 0; |
| 548 | } |
| 549 | |
| 550 | if (status) { |
| 551 | /* loop in the SHIFT-IR state */ |
| 552 | for (i = 0; i < count; i++) { |
| 553 | tdo_bit = alt_jtag_io( |
| 554 | (i == count - 1), |
| 555 | tdi[i >> 3] & (1 << (i & 7)), |
| 556 | (tdo != NULL)); |
| 557 | if (tdo != NULL) { |
| 558 | if (tdo_bit) |
| 559 | tdo[i >> 3] |= (1 << (i & 7)); |
| 560 | else |
| 561 | tdo[i >> 3] &= ~(u32)(1 << (i & 7)); |
| 562 | |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | alt_jtag_io(0, 0, 0); /* IRPAUSE */ |
| 567 | } |
| 568 | |
| 569 | return status; |
| 570 | } |
| 571 | |
| 572 | static void altera_extract_target_data(u8 *buffer, |
| 573 | u8 *target_data, |
| 574 | u32 start_index, |
| 575 | u32 preamble_count, |
| 576 | u32 target_count) |
| 577 | /* |
| 578 | * Copies target data from scan buffer, filtering out |
| 579 | * preamble and postamble data. |
| 580 | */ |
| 581 | { |
| 582 | u32 i; |
| 583 | u32 j; |
| 584 | u32 k; |
| 585 | |
| 586 | j = preamble_count; |
| 587 | k = start_index + target_count; |
| 588 | for (i = start_index; i < k; ++i, ++j) { |
| 589 | if (buffer[j >> 3] & (1 << (j & 7))) |
| 590 | target_data[i >> 3] |= (1 << (i & 7)); |
| 591 | else |
| 592 | target_data[i >> 3] &= ~(u32)(1 << (i & 7)); |
| 593 | |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | int altera_irscan(struct altera_state *astate, |
| 598 | u32 count, |
| 599 | u8 *tdi_data, |
| 600 | u32 start_index) |
| 601 | /* Shifts data into instruction register */ |
| 602 | { |
| 603 | struct altera_jtag *js = &astate->js; |
| 604 | int start_code = 0; |
| 605 | u32 alloc_chars = 0; |
| 606 | u32 shift_count = js->ir_pre + count + js->ir_post; |
| 607 | int status = 0; |
| 608 | enum altera_jtag_state start_state = ILLEGAL_JTAG_STATE; |
| 609 | |
| 610 | switch (js->jtag_state) { |
| 611 | case ILLEGAL_JTAG_STATE: |
| 612 | case RESET: |
| 613 | case IDLE: |
| 614 | start_code = 0; |
| 615 | start_state = IDLE; |
| 616 | break; |
| 617 | |
| 618 | case DRSELECT: |
| 619 | case DRCAPTURE: |
| 620 | case DRSHIFT: |
| 621 | case DREXIT1: |
| 622 | case DRPAUSE: |
| 623 | case DREXIT2: |
| 624 | case DRUPDATE: |
| 625 | start_code = 1; |
| 626 | start_state = DRPAUSE; |
| 627 | break; |
| 628 | |
| 629 | case IRSELECT: |
| 630 | case IRCAPTURE: |
| 631 | case IRSHIFT: |
| 632 | case IREXIT1: |
| 633 | case IRPAUSE: |
| 634 | case IREXIT2: |
| 635 | case IRUPDATE: |
| 636 | start_code = 2; |
| 637 | start_state = IRPAUSE; |
| 638 | break; |
| 639 | |
| 640 | default: |
| 641 | status = -EREMOTEIO; |
| 642 | break; |
| 643 | } |
| 644 | |
| 645 | if (status == 0) |
| 646 | if (js->jtag_state != start_state) |
| 647 | status = altera_goto_jstate(astate, start_state); |
| 648 | |
| 649 | if (status == 0) { |
| 650 | if (shift_count > js->ir_length) { |
| 651 | alloc_chars = (shift_count + 7) >> 3; |
| 652 | kfree(js->ir_buffer); |
| 653 | js->ir_buffer = (u8 *)alt_malloc(alloc_chars); |
| 654 | if (js->ir_buffer == NULL) |
| 655 | status = -ENOMEM; |
| 656 | else |
| 657 | js->ir_length = alloc_chars * 8; |
| 658 | |
| 659 | } |
| 660 | } |
| 661 | |
| 662 | if (status == 0) { |
| 663 | /* |
| 664 | * Copy preamble data, IR data, |
| 665 | * and postamble data into a buffer |
| 666 | */ |
| 667 | altera_concatenate_data(js->ir_buffer, |
| 668 | js->ir_pre_data, |
| 669 | js->ir_pre, |
| 670 | tdi_data, |
| 671 | start_index, |
| 672 | count, |
| 673 | js->ir_post_data, |
| 674 | js->ir_post); |
| 675 | /* Do the IRSCAN */ |
| 676 | alt_jtag_irscan(astate, |
| 677 | start_code, |
| 678 | shift_count, |
| 679 | js->ir_buffer, |
| 680 | NULL); |
| 681 | |
| 682 | /* alt_jtag_irscan() always ends in IRPAUSE state */ |
| 683 | js->jtag_state = IRPAUSE; |
| 684 | } |
| 685 | |
| 686 | if (status == 0) |
| 687 | if (js->irstop_state != IRPAUSE) |
| 688 | status = altera_goto_jstate(astate, js->irstop_state); |
| 689 | |
| 690 | |
| 691 | return status; |
| 692 | } |
| 693 | |
| 694 | int altera_swap_ir(struct altera_state *astate, |
| 695 | u32 count, |
| 696 | u8 *in_data, |
| 697 | u32 in_index, |
| 698 | u8 *out_data, |
| 699 | u32 out_index) |
| 700 | /* Shifts data into instruction register, capturing output data */ |
| 701 | { |
| 702 | struct altera_jtag *js = &astate->js; |
| 703 | int start_code = 0; |
| 704 | u32 alloc_chars = 0; |
| 705 | u32 shift_count = js->ir_pre + count + js->ir_post; |
| 706 | int status = 0; |
| 707 | enum altera_jtag_state start_state = ILLEGAL_JTAG_STATE; |
| 708 | |
| 709 | switch (js->jtag_state) { |
| 710 | case ILLEGAL_JTAG_STATE: |
| 711 | case RESET: |
| 712 | case IDLE: |
| 713 | start_code = 0; |
| 714 | start_state = IDLE; |
| 715 | break; |
| 716 | |
| 717 | case DRSELECT: |
| 718 | case DRCAPTURE: |
| 719 | case DRSHIFT: |
| 720 | case DREXIT1: |
| 721 | case DRPAUSE: |
| 722 | case DREXIT2: |
| 723 | case DRUPDATE: |
| 724 | start_code = 1; |
| 725 | start_state = DRPAUSE; |
| 726 | break; |
| 727 | |
| 728 | case IRSELECT: |
| 729 | case IRCAPTURE: |
| 730 | case IRSHIFT: |
| 731 | case IREXIT1: |
| 732 | case IRPAUSE: |
| 733 | case IREXIT2: |
| 734 | case IRUPDATE: |
| 735 | start_code = 2; |
| 736 | start_state = IRPAUSE; |
| 737 | break; |
| 738 | |
| 739 | default: |
| 740 | status = -EREMOTEIO; |
| 741 | break; |
| 742 | } |
| 743 | |
| 744 | if (status == 0) |
| 745 | if (js->jtag_state != start_state) |
| 746 | status = altera_goto_jstate(astate, start_state); |
| 747 | |
| 748 | if (status == 0) { |
| 749 | if (shift_count > js->ir_length) { |
| 750 | alloc_chars = (shift_count + 7) >> 3; |
| 751 | kfree(js->ir_buffer); |
| 752 | js->ir_buffer = (u8 *)alt_malloc(alloc_chars); |
| 753 | if (js->ir_buffer == NULL) |
| 754 | status = -ENOMEM; |
| 755 | else |
| 756 | js->ir_length = alloc_chars * 8; |
| 757 | |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | if (status == 0) { |
| 762 | /* |
| 763 | * Copy preamble data, IR data, |
| 764 | * and postamble data into a buffer |
| 765 | */ |
| 766 | altera_concatenate_data(js->ir_buffer, |
| 767 | js->ir_pre_data, |
| 768 | js->ir_pre, |
| 769 | in_data, |
| 770 | in_index, |
| 771 | count, |
| 772 | js->ir_post_data, |
| 773 | js->ir_post); |
| 774 | |
| 775 | /* Do the IRSCAN */ |
| 776 | alt_jtag_irscan(astate, |
| 777 | start_code, |
| 778 | shift_count, |
| 779 | js->ir_buffer, |
| 780 | js->ir_buffer); |
| 781 | |
| 782 | /* alt_jtag_irscan() always ends in IRPAUSE state */ |
| 783 | js->jtag_state = IRPAUSE; |
| 784 | } |
| 785 | |
| 786 | if (status == 0) |
| 787 | if (js->irstop_state != IRPAUSE) |
| 788 | status = altera_goto_jstate(astate, js->irstop_state); |
| 789 | |
| 790 | |
| 791 | if (status == 0) |
| 792 | /* Now extract the returned data from the buffer */ |
| 793 | altera_extract_target_data(js->ir_buffer, |
| 794 | out_data, out_index, |
| 795 | js->ir_pre, count); |
| 796 | |
| 797 | return status; |
| 798 | } |
| 799 | |
| 800 | int altera_drscan(struct altera_state *astate, |
| 801 | u32 count, |
| 802 | u8 *tdi_data, |
| 803 | u32 start_index) |
| 804 | /* Shifts data into data register (ignoring output data) */ |
| 805 | { |
| 806 | struct altera_jtag *js = &astate->js; |
| 807 | int start_code = 0; |
| 808 | u32 alloc_chars = 0; |
| 809 | u32 shift_count = js->dr_pre + count + js->dr_post; |
| 810 | int status = 0; |
| 811 | enum altera_jtag_state start_state = ILLEGAL_JTAG_STATE; |
| 812 | |
| 813 | switch (js->jtag_state) { |
| 814 | case ILLEGAL_JTAG_STATE: |
| 815 | case RESET: |
| 816 | case IDLE: |
| 817 | start_code = 0; |
| 818 | start_state = IDLE; |
| 819 | break; |
| 820 | |
| 821 | case DRSELECT: |
| 822 | case DRCAPTURE: |
| 823 | case DRSHIFT: |
| 824 | case DREXIT1: |
| 825 | case DRPAUSE: |
| 826 | case DREXIT2: |
| 827 | case DRUPDATE: |
| 828 | start_code = 1; |
| 829 | start_state = DRPAUSE; |
| 830 | break; |
| 831 | |
| 832 | case IRSELECT: |
| 833 | case IRCAPTURE: |
| 834 | case IRSHIFT: |
| 835 | case IREXIT1: |
| 836 | case IRPAUSE: |
| 837 | case IREXIT2: |
| 838 | case IRUPDATE: |
| 839 | start_code = 2; |
| 840 | start_state = IRPAUSE; |
| 841 | break; |
| 842 | |
| 843 | default: |
| 844 | status = -EREMOTEIO; |
| 845 | break; |
| 846 | } |
| 847 | |
| 848 | if (status == 0) |
| 849 | if (js->jtag_state != start_state) |
| 850 | status = altera_goto_jstate(astate, start_state); |
| 851 | |
| 852 | if (status == 0) { |
| 853 | if (shift_count > js->dr_length) { |
| 854 | alloc_chars = (shift_count + 7) >> 3; |
| 855 | kfree(js->dr_buffer); |
| 856 | js->dr_buffer = (u8 *)alt_malloc(alloc_chars); |
| 857 | if (js->dr_buffer == NULL) |
| 858 | status = -ENOMEM; |
| 859 | else |
| 860 | js->dr_length = alloc_chars * 8; |
| 861 | |
| 862 | } |
| 863 | } |
| 864 | |
| 865 | if (status == 0) { |
| 866 | /* |
| 867 | * Copy preamble data, DR data, |
| 868 | * and postamble data into a buffer |
| 869 | */ |
| 870 | altera_concatenate_data(js->dr_buffer, |
| 871 | js->dr_pre_data, |
| 872 | js->dr_pre, |
| 873 | tdi_data, |
| 874 | start_index, |
| 875 | count, |
| 876 | js->dr_post_data, |
| 877 | js->dr_post); |
| 878 | /* Do the DRSCAN */ |
| 879 | alt_jtag_drscan(astate, start_code, shift_count, |
| 880 | js->dr_buffer, NULL); |
| 881 | /* alt_jtag_drscan() always ends in DRPAUSE state */ |
| 882 | js->jtag_state = DRPAUSE; |
| 883 | } |
| 884 | |
| 885 | if (status == 0) |
| 886 | if (js->drstop_state != DRPAUSE) |
| 887 | status = altera_goto_jstate(astate, js->drstop_state); |
| 888 | |
| 889 | return status; |
| 890 | } |
| 891 | |
| 892 | int altera_swap_dr(struct altera_state *astate, u32 count, |
| 893 | u8 *in_data, u32 in_index, |
| 894 | u8 *out_data, u32 out_index) |
| 895 | /* Shifts data into data register, capturing output data */ |
| 896 | { |
| 897 | struct altera_jtag *js = &astate->js; |
| 898 | int start_code = 0; |
| 899 | u32 alloc_chars = 0; |
| 900 | u32 shift_count = js->dr_pre + count + js->dr_post; |
| 901 | int status = 0; |
| 902 | enum altera_jtag_state start_state = ILLEGAL_JTAG_STATE; |
| 903 | |
| 904 | switch (js->jtag_state) { |
| 905 | case ILLEGAL_JTAG_STATE: |
| 906 | case RESET: |
| 907 | case IDLE: |
| 908 | start_code = 0; |
| 909 | start_state = IDLE; |
| 910 | break; |
| 911 | |
| 912 | case DRSELECT: |
| 913 | case DRCAPTURE: |
| 914 | case DRSHIFT: |
| 915 | case DREXIT1: |
| 916 | case DRPAUSE: |
| 917 | case DREXIT2: |
| 918 | case DRUPDATE: |
| 919 | start_code = 1; |
| 920 | start_state = DRPAUSE; |
| 921 | break; |
| 922 | |
| 923 | case IRSELECT: |
| 924 | case IRCAPTURE: |
| 925 | case IRSHIFT: |
| 926 | case IREXIT1: |
| 927 | case IRPAUSE: |
| 928 | case IREXIT2: |
| 929 | case IRUPDATE: |
| 930 | start_code = 2; |
| 931 | start_state = IRPAUSE; |
| 932 | break; |
| 933 | |
| 934 | default: |
| 935 | status = -EREMOTEIO; |
| 936 | break; |
| 937 | } |
| 938 | |
| 939 | if (status == 0) |
| 940 | if (js->jtag_state != start_state) |
| 941 | status = altera_goto_jstate(astate, start_state); |
| 942 | |
| 943 | if (status == 0) { |
| 944 | if (shift_count > js->dr_length) { |
| 945 | alloc_chars = (shift_count + 7) >> 3; |
| 946 | kfree(js->dr_buffer); |
| 947 | js->dr_buffer = (u8 *)alt_malloc(alloc_chars); |
| 948 | |
| 949 | if (js->dr_buffer == NULL) |
| 950 | status = -ENOMEM; |
| 951 | else |
| 952 | js->dr_length = alloc_chars * 8; |
| 953 | |
| 954 | } |
| 955 | } |
| 956 | |
| 957 | if (status == 0) { |
| 958 | /* |
| 959 | * Copy preamble data, DR data, |
| 960 | * and postamble data into a buffer |
| 961 | */ |
| 962 | altera_concatenate_data(js->dr_buffer, |
| 963 | js->dr_pre_data, |
| 964 | js->dr_pre, |
| 965 | in_data, |
| 966 | in_index, |
| 967 | count, |
| 968 | js->dr_post_data, |
| 969 | js->dr_post); |
| 970 | |
| 971 | /* Do the DRSCAN */ |
| 972 | alt_jtag_drscan(astate, |
| 973 | start_code, |
| 974 | shift_count, |
| 975 | js->dr_buffer, |
| 976 | js->dr_buffer); |
| 977 | |
| 978 | /* alt_jtag_drscan() always ends in DRPAUSE state */ |
| 979 | js->jtag_state = DRPAUSE; |
| 980 | } |
| 981 | |
| 982 | if (status == 0) |
| 983 | if (js->drstop_state != DRPAUSE) |
| 984 | status = altera_goto_jstate(astate, js->drstop_state); |
| 985 | |
| 986 | if (status == 0) |
| 987 | /* Now extract the returned data from the buffer */ |
| 988 | altera_extract_target_data(js->dr_buffer, |
| 989 | out_data, |
| 990 | out_index, |
| 991 | js->dr_pre, |
| 992 | count); |
| 993 | |
| 994 | return status; |
| 995 | } |
| 996 | |
| 997 | void altera_free_buffers(struct altera_state *astate) |
| 998 | { |
| 999 | struct altera_jtag *js = &astate->js; |
| 1000 | /* If the JTAG interface was used, reset it to TLR */ |
| 1001 | if (js->jtag_state != ILLEGAL_JTAG_STATE) |
| 1002 | altera_jreset_idle(astate); |
| 1003 | |
| 1004 | kfree(js->dr_pre_data); |
| 1005 | js->dr_pre_data = NULL; |
| 1006 | |
| 1007 | kfree(js->dr_post_data); |
| 1008 | js->dr_post_data = NULL; |
| 1009 | |
| 1010 | kfree(js->dr_buffer); |
| 1011 | js->dr_buffer = NULL; |
| 1012 | |
| 1013 | kfree(js->ir_pre_data); |
| 1014 | js->ir_pre_data = NULL; |
| 1015 | |
| 1016 | kfree(js->ir_post_data); |
| 1017 | js->ir_post_data = NULL; |
| 1018 | |
| 1019 | kfree(js->ir_buffer); |
| 1020 | js->ir_buffer = NULL; |
| 1021 | } |