arch/arm/include/asm/hardware/iop3xx-adma.h

   1 /*
   2  * Copyright © 2006, Intel Corporation.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  16  *
  17  */
  18 #ifndef _ADMA_H
  19 #define _ADMA_H
  20 #include <linux/types.h>
  21 #include <linux/io.h>
  22 #include <mach/hardware.h>
  23 #include <asm/hardware/iop_adma.h>
  24
  25 /* Memory copy units */
  26 #define DMA_CCR(chan)           (chan->mmr_base + 0x0)
  27 #define DMA_CSR(chan)           (chan->mmr_base + 0x4)
  28 #define DMA_DAR(chan)           (chan->mmr_base + 0xc)
  29 #define DMA_NDAR(chan)          (chan->mmr_base + 0x10)
  30 #define DMA_PADR(chan)          (chan->mmr_base + 0x14)
  31 #define DMA_PUADR(chan) (chan->mmr_base + 0x18)
  32 #define DMA_LADR(chan)          (chan->mmr_base + 0x1c)
  33 #define DMA_BCR(chan)           (chan->mmr_base + 0x20)
  34 #define DMA_DCR(chan)           (chan->mmr_base + 0x24)
  35
  36 /* Application accelerator unit  */
  37 #define AAU_ACR(chan)           (chan->mmr_base + 0x0)
  38 #define AAU_ASR(chan)           (chan->mmr_base + 0x4)
  39 #define AAU_ADAR(chan)          (chan->mmr_base + 0x8)
  40 #define AAU_ANDAR(chan) (chan->mmr_base + 0xc)
  41 #define AAU_SAR(src, chan)      (chan->mmr_base + (0x10 + ((src) << 2)))
  42 #define AAU_DAR(chan)           (chan->mmr_base + 0x20)
  43 #define AAU_ABCR(chan)          (chan->mmr_base + 0x24)
  44 #define AAU_ADCR(chan)          (chan->mmr_base + 0x28)
  45 #define AAU_SAR_EDCR(src_edc)   (chan->mmr_base + (0x02c + ((src_edc-4) << 2)))
  46 #define AAU_EDCR0_IDX   8
  47 #define AAU_EDCR1_IDX   17
  48 #define AAU_EDCR2_IDX   26
  49
  50 #define DMA0_ID 0
  51 #define DMA1_ID 1
  52 #define AAU_ID 2
  53
  54 struct iop3xx_aau_desc_ctrl {
  55         unsigned int int_en:1;
  56         unsigned int blk1_cmd_ctrl:3;
  57         unsigned int blk2_cmd_ctrl:3;
  58         unsigned int blk3_cmd_ctrl:3;
  59         unsigned int blk4_cmd_ctrl:3;
  60         unsigned int blk5_cmd_ctrl:3;
  61         unsigned int blk6_cmd_ctrl:3;
  62         unsigned int blk7_cmd_ctrl:3;
  63         unsigned int blk8_cmd_ctrl:3;
  64         unsigned int blk_ctrl:2;
  65         unsigned int dual_xor_en:1;
  66         unsigned int tx_complete:1;
  67         unsigned int zero_result_err:1;
  68         unsigned int zero_result_en:1;
  69         unsigned int dest_write_en:1;
  70 };
  71
  72 struct iop3xx_aau_e_desc_ctrl {
  73         unsigned int reserved:1;
  74         unsigned int blk1_cmd_ctrl:3;
  75         unsigned int blk2_cmd_ctrl:3;
  76         unsigned int blk3_cmd_ctrl:3;
  77         unsigned int blk4_cmd_ctrl:3;
  78         unsigned int blk5_cmd_ctrl:3;
  79         unsigned int blk6_cmd_ctrl:3;
  80         unsigned int blk7_cmd_ctrl:3;
  81         unsigned int blk8_cmd_ctrl:3;
  82         unsigned int reserved2:7;
  83 };
  84
  85 struct iop3xx_dma_desc_ctrl {
  86         unsigned int pci_transaction:4;
  87         unsigned int int_en:1;
  88         unsigned int dac_cycle_en:1;
  89         unsigned int mem_to_mem_en:1;
  90         unsigned int crc_data_tx_en:1;
  91         unsigned int crc_gen_en:1;
  92         unsigned int crc_seed_dis:1;
  93         unsigned int reserved:21;
  94         unsigned int crc_tx_complete:1;
  95 };
  96
  97 struct iop3xx_desc_dma {
  98         u32 next_desc;
  99         union {
 100                 u32 pci_src_addr;
 101                 u32 pci_dest_addr;
 102                 u32 src_addr;
 103         };
 104         union {
 105                 u32 upper_pci_src_addr;
 106                 u32 upper_pci_dest_addr;
 107         };
 108         union {
 109                 u32 local_pci_src_addr;
 110                 u32 local_pci_dest_addr;
 111                 u32 dest_addr;
 112         };
 113         u32 byte_count;
 114         union {
 115                 u32 desc_ctrl;
 116                 struct iop3xx_dma_desc_ctrl desc_ctrl_field;
 117         };
 118         u32 crc_addr;
 119 };
 120
 121 struct iop3xx_desc_aau {
 122         u32 next_desc;
 123         u32 src[4];
 124         u32 dest_addr;
 125         u32 byte_count;
 126         union {
 127                 u32 desc_ctrl;
 128                 struct iop3xx_aau_desc_ctrl desc_ctrl_field;
 129         };
 130         union {
 131                 u32 src_addr;
 132                 u32 e_desc_ctrl;
 133                 struct iop3xx_aau_e_desc_ctrl e_desc_ctrl_field;
 134         } src_edc[31];
 135 };
 136
 137 struct iop3xx_aau_gfmr {
 138         unsigned int gfmr1:8;
 139         unsigned int gfmr2:8;
 140         unsigned int gfmr3:8;
 141         unsigned int gfmr4:8;
 142 };
 143
 144 struct iop3xx_desc_pq_xor {
 145         u32 next_desc;
 146         u32 src[3];
 147         union {
 148                 u32 data_mult1;
 149                 struct iop3xx_aau_gfmr data_mult1_field;
 150         };
 151         u32 dest_addr;
 152         u32 byte_count;
 153         union {
 154                 u32 desc_ctrl;
 155                 struct iop3xx_aau_desc_ctrl desc_ctrl_field;
 156         };
 157         union {
 158                 u32 src_addr;
 159                 u32 e_desc_ctrl;
 160                 struct iop3xx_aau_e_desc_ctrl e_desc_ctrl_field;
 161                 u32 data_multiplier;
 162                 struct iop3xx_aau_gfmr data_mult_field;
 163                 u32 reserved;
 164         } src_edc_gfmr[19];
 165 };
 166
 167 struct iop3xx_desc_dual_xor {
 168         u32 next_desc;
 169         u32 src0_addr;
 170         u32 src1_addr;
 171         u32 h_src_addr;
 172         u32 d_src_addr;
 173         u32 h_dest_addr;
 174         u32 byte_count;
 175         union {
 176                 u32 desc_ctrl;
 177                 struct iop3xx_aau_desc_ctrl desc_ctrl_field;
 178         };
 179         u32 d_dest_addr;
 180 };
 181
 182 union iop3xx_desc {
 183         struct iop3xx_desc_aau *aau;
 184         struct iop3xx_desc_dma *dma;
 185         struct iop3xx_desc_pq_xor *pq_xor;
 186         struct iop3xx_desc_dual_xor *dual_xor;
 187         void *ptr;
 188 };
 189
 190 /* No support for p+q operations */
 191 static inline int
 192 iop_chan_pq_slot_count(size_t len, int src_cnt, int *slots_per_op)
 193 {
 194         BUG();
 195         return 0;
 196 }
 197
 198 static inline void
 199 iop_desc_init_pq(struct iop_adma_desc_slot *desc, int src_cnt,
 200                   unsigned long flags)
 201 {
 202         BUG();
 203 }
 204
 205 static inline void
 206 iop_desc_set_pq_addr(struct iop_adma_desc_slot *desc, dma_addr_t *addr)
 207 {
 208         BUG();
 209 }
 210
 211 static inline void
 212 iop_desc_set_pq_src_addr(struct iop_adma_desc_slot *desc, int src_idx,
 213                          dma_addr_t addr, unsigned char coef)
 214 {
 215         BUG();
 216 }
 217
 218 static inline int
 219 iop_chan_pq_zero_sum_slot_count(size_t len, int src_cnt, int *slots_per_op)
 220 {
 221         BUG();
 222         return 0;
 223 }
 224
 225 static inline void
 226 iop_desc_init_pq_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt,
 227                           unsigned long flags)
 228 {
 229         BUG();
 230 }
 231
 232 static inline void
 233 iop_desc_set_pq_zero_sum_byte_count(struct iop_adma_desc_slot *desc, u32 len)
 234 {
 235         BUG();
 236 }
 237
 238 #define iop_desc_set_pq_zero_sum_src_addr iop_desc_set_pq_src_addr
 239
 240 static inline void
 241 iop_desc_set_pq_zero_sum_addr(struct iop_adma_desc_slot *desc, int pq_idx,
 242                               dma_addr_t *src)
 243 {
 244         BUG();
 245 }
 246
 247 static inline int iop_adma_get_max_xor(void)
 248 {
 249         return 32;
 250 }
 251
 252 static inline int iop_adma_get_max_pq(void)
 253 {
 254         BUG();
 255         return 0;
 256 }
 257
 258 static inline u32 iop_chan_get_current_descriptor(struct iop_adma_chan *chan)
 259 {
 260         int id = chan->device->id;
 261
 262         switch (id) {
 263         case DMA0_ID:
 264         case DMA1_ID:
 265                 return __raw_readl(DMA_DAR(chan));
 266         case AAU_ID:
 267                 return __raw_readl(AAU_ADAR(chan));
 268         default:
 269                 BUG();
 270         }
 271         return 0;
 272 }
 273
 274 static inline void iop_chan_set_next_descriptor(struct iop_adma_chan *chan,
 275                                                 u32 next_desc_addr)
 276 {
 277         int id = chan->device->id;
 278
 279         switch (id) {
 280         case DMA0_ID:
 281         case DMA1_ID:
 282                 __raw_writel(next_desc_addr, DMA_NDAR(chan));
 283                 break;
 284         case AAU_ID:
 285                 __raw_writel(next_desc_addr, AAU_ANDAR(chan));
 286                 break;
 287         }
 288
 289 }
 290
 291 #define IOP_ADMA_STATUS_BUSY (1 << 10)
 292 #define IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT (1024)
 293 #define IOP_ADMA_XOR_MAX_BYTE_COUNT (16 * 1024 * 1024)
 294 #define IOP_ADMA_MAX_BYTE_COUNT (16 * 1024 * 1024)
 295
 296 static inline int iop_chan_is_busy(struct iop_adma_chan *chan)
 297 {
 298         u32 status = __raw_readl(DMA_CSR(chan));
 299         return (status & IOP_ADMA_STATUS_BUSY) ? 1 : 0;
 300 }
 301
 302 static inline int iop_desc_is_aligned(struct iop_adma_desc_slot *desc,
 303                                         int num_slots)
 304 {
 305         /* num_slots will only ever be 1, 2, 4, or 8 */
 306         return (desc->idx & (num_slots - 1)) ? 0 : 1;
 307 }
 308
 309 /* to do: support large (i.e. > hw max) buffer sizes */
 310 static inline int iop_chan_memcpy_slot_count(size_t len, int *slots_per_op)
 311 {
 312         *slots_per_op = 1;
 313         return 1;
 314 }
 315
 316 /* to do: support large (i.e. > hw max) buffer sizes */
 317 static inline int iop_chan_memset_slot_count(size_t len, int *slots_per_op)
 318 {
 319         *slots_per_op = 1;
 320         return 1;
 321 }
 322
 323 static inline int iop3xx_aau_xor_slot_count(size_t len, int src_cnt,
 324                                         int *slots_per_op)
 325 {
 326         static const char slot_count_table[] = {
 327                                                 1, 1, 1, 1, /* 01 - 04 */
 328                                                 2, 2, 2, 2, /* 05 - 08 */
 329                                                 4, 4, 4, 4, /* 09 - 12 */
 330                                                 4, 4, 4, 4, /* 13 - 16 */
 331                                                 8, 8, 8, 8, /* 17 - 20 */
 332                                                 8, 8, 8, 8, /* 21 - 24 */
 333                                                 8, 8, 8, 8, /* 25 - 28 */
 334                                                 8, 8, 8, 8, /* 29 - 32 */
 335                                               };
 336         *slots_per_op = slot_count_table[src_cnt - 1];
 337         return *slots_per_op;
 338 }
 339
 340 static inline int
 341 iop_chan_interrupt_slot_count(int *slots_per_op, struct iop_adma_chan *chan)
 342 {
 343         switch (chan->device->id) {
 344         case DMA0_ID:
 345         case DMA1_ID:
 346                 return iop_chan_memcpy_slot_count(0, slots_per_op);
 347         case AAU_ID:
 348                 return iop3xx_aau_xor_slot_count(0, 2, slots_per_op);
 349         default:
 350                 BUG();
 351         }
 352         return 0;
 353 }
 354
 355 static inline int iop_chan_xor_slot_count(size_t len, int src_cnt,
 356                                                 int *slots_per_op)
 357 {
 358         int slot_cnt = iop3xx_aau_xor_slot_count(len, src_cnt, slots_per_op);
 359
 360         if (len <= IOP_ADMA_XOR_MAX_BYTE_COUNT)
 361                 return slot_cnt;
 362
 363         len -= IOP_ADMA_XOR_MAX_BYTE_COUNT;
 364         while (len > IOP_ADMA_XOR_MAX_BYTE_COUNT) {
 365                 len -= IOP_ADMA_XOR_MAX_BYTE_COUNT;
 366                 slot_cnt += *slots_per_op;
 367         }
 368
 369         slot_cnt += *slots_per_op;
 370
 371         return slot_cnt;
 372 }
 373
 374 /* zero sum on iop3xx is limited to 1k at a time so it requires multiple
 375  * descriptors
 376  */
 377 static inline int iop_chan_zero_sum_slot_count(size_t len, int src_cnt,
 378                                                 int *slots_per_op)
 379 {
 380         int slot_cnt = iop3xx_aau_xor_slot_count(len, src_cnt, slots_per_op);
 381
 382         if (len <= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT)
 383                 return slot_cnt;
 384
 385         len -= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
 386         while (len > IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT) {
 387                 len -= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
 388                 slot_cnt += *slots_per_op;
 389         }
 390
 391         slot_cnt += *slots_per_op;
 392
 393         return slot_cnt;
 394 }
 395
 396 static inline int iop_desc_is_pq(struct iop_adma_desc_slot *desc)
 397 {
 398         return 0;
 399 }
 400
 401 static inline u32 iop_desc_get_dest_addr(struct iop_adma_desc_slot *desc,
 402                                         struct iop_adma_chan *chan)
 403 {
 404         union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
 405
 406         switch (chan->device->id) {
 407         case DMA0_ID:
 408         case DMA1_ID:
 409                 return hw_desc.dma->dest_addr;
 410         case AAU_ID:
 411                 return hw_desc.aau->dest_addr;
 412         default:
 413                 BUG();
 414         }
 415         return 0;
 416 }
 417
 418
 419 static inline u32 iop_desc_get_qdest_addr(struct iop_adma_desc_slot *desc,
 420                                           struct iop_adma_chan *chan)
 421 {
 422         BUG();
 423         return 0;
 424 }
 425
 426 static inline u32 iop_desc_get_byte_count(struct iop_adma_desc_slot *desc,
 427                                         struct iop_adma_chan *chan)
 428 {
 429         union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
 430
 431         switch (chan->device->id) {
 432         case DMA0_ID:
 433         case DMA1_ID:
 434                 return hw_desc.dma->byte_count;
 435         case AAU_ID:
 436                 return hw_desc.aau->byte_count;
 437         default:
 438                 BUG();
 439         }
 440         return 0;
 441 }
 442
 443 /* translate the src_idx to a descriptor word index */
 444 static inline int __desc_idx(int src_idx)
 445 {
 446         static const int desc_idx_table[] = { 0, 0, 0, 0,
 447                                               0, 1, 2, 3,
 448                                               5, 6, 7, 8,
 449                                               9, 10, 11, 12,
 450                                               14, 15, 16, 17,
 451                                               18, 19, 20, 21,
 452                                               23, 24, 25, 26,
 453                                               27, 28, 29, 30,
 454                                             };
 455
 456         return desc_idx_table[src_idx];
 457 }
 458
 459 static inline u32 iop_desc_get_src_addr(struct iop_adma_desc_slot *desc,
 460                                         struct iop_adma_chan *chan,
 461                                         int src_idx)
 462 {
 463         union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
 464
 465         switch (chan->device->id) {
 466         case DMA0_ID:
 467         case DMA1_ID:
 468                 return hw_desc.dma->src_addr;
 469         case AAU_ID:
 470                 break;
 471         default:
 472                 BUG();
 473         }
 474
 475         if (src_idx < 4)
 476                 return hw_desc.aau->src[src_idx];
 477         else
 478                 return hw_desc.aau->src_edc[__desc_idx(src_idx)].src_addr;
 479 }
 480
 481 static inline void iop3xx_aau_desc_set_src_addr(struct iop3xx_desc_aau *hw_desc,
 482                                         int src_idx, dma_addr_t addr)
 483 {
 484         if (src_idx < 4)
 485                 hw_desc->src[src_idx] = addr;
 486         else
 487                 hw_desc->src_edc[__desc_idx(src_idx)].src_addr = addr;
 488 }
 489
 490 static inline void
 491 iop_desc_init_memcpy(struct iop_adma_desc_slot *desc, unsigned long flags)
 492 {
 493         struct iop3xx_desc_dma *hw_desc = desc->hw_desc;
 494         union {
 495                 u32 value;
 496                 struct iop3xx_dma_desc_ctrl field;
 497         } u_desc_ctrl;
 498
 499         u_desc_ctrl.value = 0;
 500         u_desc_ctrl.field.mem_to_mem_en = 1;
 501         u_desc_ctrl.field.pci_transaction = 0xe; /* memory read block */
 502         u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
 503         hw_desc->desc_ctrl = u_desc_ctrl.value;
 504         hw_desc->upper_pci_src_addr = 0;
 505         hw_desc->crc_addr = 0;
 506 }
 507
 508 static inline void
 509 iop_desc_init_memset(struct iop_adma_desc_slot *desc, unsigned long flags)
 510 {
 511         struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
 512         union {
 513                 u32 value;
 514                 struct iop3xx_aau_desc_ctrl field;
 515         } u_desc_ctrl;
 516
 517         u_desc_ctrl.value = 0;
 518         u_desc_ctrl.field.blk1_cmd_ctrl = 0x2; /* memory block fill */
 519         u_desc_ctrl.field.dest_write_en = 1;
 520         u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
 521         hw_desc->desc_ctrl = u_desc_ctrl.value;
 522 }
 523
 524 static inline u32
 525 iop3xx_desc_init_xor(struct iop3xx_desc_aau *hw_desc, int src_cnt,
 526                      unsigned long flags)
 527 {
 528         int i, shift;
 529         u32 edcr;
 530         union {
 531                 u32 value;
 532                 struct iop3xx_aau_desc_ctrl field;
 533         } u_desc_ctrl;
 534
 535         u_desc_ctrl.value = 0;
 536         switch (src_cnt) {
 537         case 25 ... 32:
 538                 u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
 539                 edcr = 0;
 540                 shift = 1;
 541                 for (i = 24; i < src_cnt; i++) {
 542                         edcr |= (1 << shift);
 543                         shift += 3;
 544                 }
 545                 hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = edcr;
 546                 src_cnt = 24;
 547                 /* fall through */
 548         case 17 ... 24:
 549                 if (!u_desc_ctrl.field.blk_ctrl) {
 550                         hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
 551                         u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
 552                 }
 553                 edcr = 0;
 554                 shift = 1;
 555                 for (i = 16; i < src_cnt; i++) {
 556                         edcr |= (1 << shift);
 557                         shift += 3;
 558                 }
 559                 hw_desc->src_edc[AAU_EDCR1_IDX].e_desc_ctrl = edcr;
 560                 src_cnt = 16;
 561                 /* fall through */
 562         case 9 ... 16:
 563                 if (!u_desc_ctrl.field.blk_ctrl)
 564                         u_desc_ctrl.field.blk_ctrl = 0x2; /* use EDCR0 */
 565                 edcr = 0;
 566                 shift = 1;
 567                 for (i = 8; i < src_cnt; i++) {
 568                         edcr |= (1 << shift);
 569                         shift += 3;
 570                 }
 571                 hw_desc->src_edc[AAU_EDCR0_IDX].e_desc_ctrl = edcr;
 572                 src_cnt = 8;
 573                 /* fall through */
 574         case 2 ... 8:
 575                 shift = 1;
 576                 for (i = 0; i < src_cnt; i++) {
 577                         u_desc_ctrl.value |= (1 << shift);
 578                         shift += 3;
 579                 }
 580
 581                 if (!u_desc_ctrl.field.blk_ctrl && src_cnt > 4)
 582                         u_desc_ctrl.field.blk_ctrl = 0x1; /* use mini-desc */
 583         }
 584
 585         u_desc_ctrl.field.dest_write_en = 1;
 586         u_desc_ctrl.field.blk1_cmd_ctrl = 0x7; /* direct fill */
 587         u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
 588         hw_desc->desc_ctrl = u_desc_ctrl.value;
 589
 590         return u_desc_ctrl.value;
 591 }
 592
 593 static inline void
 594 iop_desc_init_xor(struct iop_adma_desc_slot *desc, int src_cnt,
 595                   unsigned long flags)
 596 {
 597         iop3xx_desc_init_xor(desc->hw_desc, src_cnt, flags);
 598 }
 599
 600 /* return the number of operations */
 601 static inline int
 602 iop_desc_init_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt,
 603                        unsigned long flags)
 604 {
 605         int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
 606         struct iop3xx_desc_aau *hw_desc, *prev_hw_desc, *iter;
 607         union {
 608                 u32 value;
 609                 struct iop3xx_aau_desc_ctrl field;
 610         } u_desc_ctrl;
 611         int i, j;
 612
 613         hw_desc = desc->hw_desc;
 614
 615         for (i = 0, j = 0; (slot_cnt -= slots_per_op) >= 0;
 616                 i += slots_per_op, j++) {
 617                 iter = iop_hw_desc_slot_idx(hw_desc, i);
 618                 u_desc_ctrl.value = iop3xx_desc_init_xor(iter, src_cnt, flags);
 619                 u_desc_ctrl.field.dest_write_en = 0;
 620                 u_desc_ctrl.field.zero_result_en = 1;
 621                 u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
 622                 iter->desc_ctrl = u_desc_ctrl.value;
 623
 624                 /* for the subsequent descriptors preserve the store queue
 625                  * and chain them together
 626                  */
 627                 if (i) {
 628                         prev_hw_desc =
 629                                 iop_hw_desc_slot_idx(hw_desc, i - slots_per_op);
 630                         prev_hw_desc->next_desc =
 631                                 (u32) (desc->async_tx.phys + (i << 5));
 632                 }
 633         }
 634
 635         return j;
 636 }
 637
 638 static inline void
 639 iop_desc_init_null_xor(struct iop_adma_desc_slot *desc, int src_cnt,
 640                        unsigned long flags)
 641 {
 642         struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
 643         union {
 644                 u32 value;
 645                 struct iop3xx_aau_desc_ctrl field;
 646         } u_desc_ctrl;
 647
 648         u_desc_ctrl.value = 0;
 649         switch (src_cnt) {
 650         case 25 ... 32:
 651                 u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
 652                 hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
 653                 /* fall through */
 654         case 17 ... 24:
 655                 if (!u_desc_ctrl.field.blk_ctrl) {
 656                         hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
 657                         u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
 658                 }
 659                 hw_desc->src_edc[AAU_EDCR1_IDX].e_desc_ctrl = 0;
 660                 /* fall through */
 661         case 9 ... 16:
 662                 if (!u_desc_ctrl.field.blk_ctrl)
 663                         u_desc_ctrl.field.blk_ctrl = 0x2; /* use EDCR0 */
 664                 hw_desc->src_edc[AAU_EDCR0_IDX].e_desc_ctrl = 0;
 665                 /* fall through */
 666         case 1 ... 8:
 667                 if (!u_desc_ctrl.field.blk_ctrl && src_cnt > 4)
 668                         u_desc_ctrl.field.blk_ctrl = 0x1; /* use mini-desc */
 669         }
 670
 671         u_desc_ctrl.field.dest_write_en = 0;
 672         u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
 673         hw_desc->desc_ctrl = u_desc_ctrl.value;
 674 }
 675
 676 static inline void iop_desc_set_byte_count(struct iop_adma_desc_slot *desc,
 677                                         struct iop_adma_chan *chan,
 678                                         u32 byte_count)
 679 {
 680         union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
 681
 682         switch (chan->device->id) {
 683         case DMA0_ID:
 684         case DMA1_ID:
 685                 hw_desc.dma->byte_count = byte_count;
 686                 break;
 687         case AAU_ID:
 688                 hw_desc.aau->byte_count = byte_count;
 689                 break;
 690         default:
 691                 BUG();
 692         }
 693 }
 694
 695 static inline void
 696 iop_desc_init_interrupt(struct iop_adma_desc_slot *desc,
 697                         struct iop_adma_chan *chan)
 698 {
 699         union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
 700
 701         switch (chan->device->id) {
 702         case DMA0_ID:
 703         case DMA1_ID:
 704                 iop_desc_init_memcpy(desc, 1);
 705                 hw_desc.dma->byte_count = 0;
 706                 hw_desc.dma->dest_addr = 0;
 707                 hw_desc.dma->src_addr = 0;
 708                 break;
 709         case AAU_ID:
 710                 iop_desc_init_null_xor(desc, 2, 1);
 711                 hw_desc.aau->byte_count = 0;
 712                 hw_desc.aau->dest_addr = 0;
 713                 hw_desc.aau->src[0] = 0;
 714                 hw_desc.aau->src[1] = 0;
 715                 break;
 716         default:
 717                 BUG();
 718         }
 719 }
 720
 721 static inline void
 722 iop_desc_set_zero_sum_byte_count(struct iop_adma_desc_slot *desc, u32 len)
 723 {
 724         int slots_per_op = desc->slots_per_op;
 725         struct iop3xx_desc_aau *hw_desc = desc->hw_desc, *iter;
 726         int i = 0;
 727
 728         if (len <= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT) {
 729                 hw_desc->byte_count = len;
 730         } else {
 731                 do {
 732                         iter = iop_hw_desc_slot_idx(hw_desc, i);
 733                         iter->byte_count = IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
 734                         len -= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
 735                         i += slots_per_op;
 736                 } while (len > IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT);
 737
 738                 iter = iop_hw_desc_slot_idx(hw_desc, i);
 739                 iter->byte_count = len;
 740         }
 741 }
 742
 743 static inline void iop_desc_set_dest_addr(struct iop_adma_desc_slot *desc,
 744                                         struct iop_adma_chan *chan,
 745                                         dma_addr_t addr)
 746 {
 747         union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
 748
 749         switch (chan->device->id) {
 750         case DMA0_ID:
 751         case DMA1_ID:
 752                 hw_desc.dma->dest_addr = addr;
 753                 break;
 754         case AAU_ID:
 755                 hw_desc.aau->dest_addr = addr;
 756                 break;
 757         default:
 758                 BUG();
 759         }
 760 }
 761
 762 static inline void iop_desc_set_memcpy_src_addr(struct iop_adma_desc_slot *desc,
 763                                         dma_addr_t addr)
 764 {
 765         struct iop3xx_desc_dma *hw_desc = desc->hw_desc;
 766         hw_desc->src_addr = addr;
 767 }
 768
 769 static inline void
 770 iop_desc_set_zero_sum_src_addr(struct iop_adma_desc_slot *desc, int src_idx,
 771                                 dma_addr_t addr)
 772 {
 773
 774         struct iop3xx_desc_aau *hw_desc = desc->hw_desc, *iter;
 775         int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
 776         int i;
 777
 778         for (i = 0; (slot_cnt -= slots_per_op) >= 0;
 779                 i += slots_per_op, addr += IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT) {
 780                 iter = iop_hw_desc_slot_idx(hw_desc, i);
 781                 iop3xx_aau_desc_set_src_addr(iter, src_idx, addr);
 782         }
 783 }
 784
 785 static inline void iop_desc_set_xor_src_addr(struct iop_adma_desc_slot *desc,
 786                                         int src_idx, dma_addr_t addr)
 787 {
 788
 789         struct iop3xx_desc_aau *hw_desc = desc->hw_desc, *iter;
 790         int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
 791         int i;
 792
 793         for (i = 0; (slot_cnt -= slots_per_op) >= 0;
 794                 i += slots_per_op, addr += IOP_ADMA_XOR_MAX_BYTE_COUNT) {
 795                 iter = iop_hw_desc_slot_idx(hw_desc, i);
 796                 iop3xx_aau_desc_set_src_addr(iter, src_idx, addr);
 797         }
 798 }
 799
 800 static inline void iop_desc_set_next_desc(struct iop_adma_desc_slot *desc,
 801                                         u32 next_desc_addr)
 802 {
 803         /* hw_desc->next_desc is the same location for all channels */
 804         union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
 805
 806         iop_paranoia(hw_desc.dma->next_desc);
 807         hw_desc.dma->next_desc = next_desc_addr;
 808 }
 809
 810 static inline u32 iop_desc_get_next_desc(struct iop_adma_desc_slot *desc)
 811 {
 812         /* hw_desc->next_desc is the same location for all channels */
 813         union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
 814         return hw_desc.dma->next_desc;
 815 }
 816
 817 static inline void iop_desc_clear_next_desc(struct iop_adma_desc_slot *desc)
 818 {
 819         /* hw_desc->next_desc is the same location for all channels */
 820         union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
 821         hw_desc.dma->next_desc = 0;
 822 }
 823
 824 static inline void iop_desc_set_block_fill_val(struct iop_adma_desc_slot *desc,
 825                                                 u32 val)
 826 {
 827         struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
 828         hw_desc->src[0] = val;
 829 }
 830
 831 static inline enum sum_check_flags
 832 iop_desc_get_zero_result(struct iop_adma_desc_slot *desc)
 833 {
 834         struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
 835         struct iop3xx_aau_desc_ctrl desc_ctrl = hw_desc->desc_ctrl_field;
 836
 837         iop_paranoia(!(desc_ctrl.tx_complete && desc_ctrl.zero_result_en));
 838         return desc_ctrl.zero_result_err << SUM_CHECK_P;
 839 }
 840
 841 static inline void iop_chan_append(struct iop_adma_chan *chan)
 842 {
 843         u32 dma_chan_ctrl;
 844
 845         dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
 846         dma_chan_ctrl |= 0x2;
 847         __raw_writel(dma_chan_ctrl, DMA_CCR(chan));
 848 }
 849
 850 static inline u32 iop_chan_get_status(struct iop_adma_chan *chan)
 851 {
 852         return __raw_readl(DMA_CSR(chan));
 853 }
 854
 855 static inline void iop_chan_disable(struct iop_adma_chan *chan)
 856 {
 857         u32 dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
 858         dma_chan_ctrl &= ~1;
 859         __raw_writel(dma_chan_ctrl, DMA_CCR(chan));
 860 }
 861
 862 static inline void iop_chan_enable(struct iop_adma_chan *chan)
 863 {
 864         u32 dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
 865
 866         dma_chan_ctrl |= 1;
 867         __raw_writel(dma_chan_ctrl, DMA_CCR(chan));
 868 }
 869
 870 static inline void iop_adma_device_clear_eot_status(struct iop_adma_chan *chan)
 871 {
 872         u32 status = __raw_readl(DMA_CSR(chan));
 873         status &= (1 << 9);
 874         __raw_writel(status, DMA_CSR(chan));
 875 }
 876
 877 static inline void iop_adma_device_clear_eoc_status(struct iop_adma_chan *chan)
 878 {
 879         u32 status = __raw_readl(DMA_CSR(chan));
 880         status &= (1 << 8);
 881         __raw_writel(status, DMA_CSR(chan));
 882 }
 883
 884 static inline void iop_adma_device_clear_err_status(struct iop_adma_chan *chan)
 885 {
 886         u32 status = __raw_readl(DMA_CSR(chan));
 887
 888         switch (chan->device->id) {
 889         case DMA0_ID:
 890         case DMA1_ID:
 891                 status &= (1 << 5) | (1 << 3) | (1 << 2) | (1 << 1);
 892                 break;
 893         case AAU_ID:
 894                 status &= (1 << 5);
 895                 break;
 896         default:
 897                 BUG();
 898         }
 899
 900         __raw_writel(status, DMA_CSR(chan));
 901 }
 902
 903 static inline int
 904 iop_is_err_int_parity(unsigned long status, struct iop_adma_chan *chan)
 905 {
 906         return 0;
 907 }
 908
 909 static inline int
 910 iop_is_err_mcu_abort(unsigned long status, struct iop_adma_chan *chan)
 911 {
 912         return 0;
 913 }
 914
 915 static inline int
 916 iop_is_err_int_tabort(unsigned long status, struct iop_adma_chan *chan)
 917 {
 918         return 0;
 919 }
 920
 921 static inline int
 922 iop_is_err_int_mabort(unsigned long status, struct iop_adma_chan *chan)
 923 {
 924         return test_bit(5, &status);
 925 }
 926
 927 static inline int
 928 iop_is_err_pci_tabort(unsigned long status, struct iop_adma_chan *chan)
 929 {
 930         switch (chan->device->id) {
 931         case DMA0_ID:
 932         case DMA1_ID:
 933                 return test_bit(2, &status);
 934         default:
 935                 return 0;
 936         }
 937 }
 938
 939 static inline int
 940 iop_is_err_pci_mabort(unsigned long status, struct iop_adma_chan *chan)
 941 {
 942         switch (chan->device->id) {
 943         case DMA0_ID:
 944         case DMA1_ID:
 945                 return test_bit(3, &status);
 946         default:
 947                 return 0;
 948         }
 949 }
 950
 951 static inline int
 952 iop_is_err_split_tx(unsigned long status, struct iop_adma_chan *chan)
 953 {
 954         switch (chan->device->id) {
 955         case DMA0_ID:
 956         case DMA1_ID:
 957                 return test_bit(1, &status);
 958         default:
 959                 return 0;
 960         }
 961 }
 962 #endif /* _ADMA_H */