drivers/usb/renesas_usbhs/pipe.c

   1 // SPDX-License-Identifier: GPL-1.0+
   2 /*
   3  * Renesas USB driver
   4  *
   5  * Copyright (C) 2011 Renesas Solutions Corp.
   6  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   7  */
   8 #include <linux/delay.h>
   9 #include <linux/slab.h>
  10 #include "common.h"
  11 #include "pipe.h"
  12
  13 /*
  14  *              macros
  15  */
  16 #define usbhsp_addr_offset(p)   ((usbhs_pipe_number(p) - 1) * 2)
  17
  18 #define usbhsp_flags_set(p, f)  ((p)->flags |=  USBHS_PIPE_FLAGS_##f)
  19 #define usbhsp_flags_clr(p, f)  ((p)->flags &= ~USBHS_PIPE_FLAGS_##f)
  20 #define usbhsp_flags_has(p, f)  ((p)->flags &   USBHS_PIPE_FLAGS_##f)
  21 #define usbhsp_flags_init(p)    do {(p)->flags = 0; } while (0)
  22
  23 /*
  24  * for debug
  25  */
  26 static char *usbhsp_pipe_name[] = {
  27         [USB_ENDPOINT_XFER_CONTROL]     = "DCP",
  28         [USB_ENDPOINT_XFER_BULK]        = "BULK",
  29         [USB_ENDPOINT_XFER_INT]         = "INT",
  30         [USB_ENDPOINT_XFER_ISOC]        = "ISO",
  31 };
  32
  33 char *usbhs_pipe_name(struct usbhs_pipe *pipe)
  34 {
  35         return usbhsp_pipe_name[usbhs_pipe_type(pipe)];
  36 }
  37
  38 static struct renesas_usbhs_driver_pipe_config
  39 *usbhsp_get_pipe_config(struct usbhs_priv *priv, int pipe_num)
  40 {
  41         struct renesas_usbhs_driver_pipe_config *pipe_configs =
  42                                         usbhs_get_dparam(priv, pipe_configs);
  43
  44         return &pipe_configs[pipe_num];
  45 }
  46
  47 /*
  48  *              DCPCTR/PIPEnCTR functions
  49  */
  50 static void usbhsp_pipectrl_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
  51 {
  52         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
  53         int offset = usbhsp_addr_offset(pipe);
  54
  55         if (usbhs_pipe_is_dcp(pipe))
  56                 usbhs_bset(priv, DCPCTR, mask, val);
  57         else
  58                 usbhs_bset(priv, PIPEnCTR + offset, mask, val);
  59 }
  60
  61 static u16 usbhsp_pipectrl_get(struct usbhs_pipe *pipe)
  62 {
  63         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
  64         int offset = usbhsp_addr_offset(pipe);
  65
  66         if (usbhs_pipe_is_dcp(pipe))
  67                 return usbhs_read(priv, DCPCTR);
  68         else
  69                 return usbhs_read(priv, PIPEnCTR + offset);
  70 }
  71
  72 /*
  73  *              DCP/PIPE functions
  74  */
  75 static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
  76                                   u16 dcp_reg, u16 pipe_reg,
  77                                   u16 mask, u16 val)
  78 {
  79         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
  80
  81         if (usbhs_pipe_is_dcp(pipe))
  82                 usbhs_bset(priv, dcp_reg, mask, val);
  83         else
  84                 usbhs_bset(priv, pipe_reg, mask, val);
  85 }
  86
  87 static u16 __usbhsp_pipe_xxx_get(struct usbhs_pipe *pipe,
  88                                  u16 dcp_reg, u16 pipe_reg)
  89 {
  90         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
  91
  92         if (usbhs_pipe_is_dcp(pipe))
  93                 return usbhs_read(priv, dcp_reg);
  94         else
  95                 return usbhs_read(priv, pipe_reg);
  96 }
  97
  98 /*
  99  *              DCPCFG/PIPECFG functions
 100  */
 101 static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 102 {
 103         __usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
 104 }
 105
 106 static u16 usbhsp_pipe_cfg_get(struct usbhs_pipe *pipe)
 107 {
 108         return __usbhsp_pipe_xxx_get(pipe, DCPCFG, PIPECFG);
 109 }
 110
 111 /*
 112  *              PIPEnTRN/PIPEnTRE functions
 113  */
 114 static void usbhsp_pipe_trn_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 115 {
 116         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 117         struct device *dev = usbhs_priv_to_dev(priv);
 118         int num = usbhs_pipe_number(pipe);
 119         u16 reg;
 120
 121         /*
 122          * It is impossible to calculate address,
 123          * since PIPEnTRN addresses were mapped randomly.
 124          */
 125 #define CASE_PIPExTRN(a)                \
 126         case 0x ## a:                   \
 127                 reg = PIPE ## a ## TRN; \
 128                 break;
 129
 130         switch (num) {
 131         CASE_PIPExTRN(1);
 132         CASE_PIPExTRN(2);
 133         CASE_PIPExTRN(3);
 134         CASE_PIPExTRN(4);
 135         CASE_PIPExTRN(5);
 136         CASE_PIPExTRN(B);
 137         CASE_PIPExTRN(C);
 138         CASE_PIPExTRN(D);
 139         CASE_PIPExTRN(E);
 140         CASE_PIPExTRN(F);
 141         CASE_PIPExTRN(9);
 142         CASE_PIPExTRN(A);
 143         default:
 144                 dev_err(dev, "unknown pipe (%d)\n", num);
 145                 return;
 146         }
 147         __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
 148 }
 149
 150 static void usbhsp_pipe_tre_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 151 {
 152         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 153         struct device *dev = usbhs_priv_to_dev(priv);
 154         int num = usbhs_pipe_number(pipe);
 155         u16 reg;
 156
 157         /*
 158          * It is impossible to calculate address,
 159          * since PIPEnTRE addresses were mapped randomly.
 160          */
 161 #define CASE_PIPExTRE(a)                        \
 162         case 0x ## a:                           \
 163                 reg = PIPE ## a ## TRE;         \
 164                 break;
 165
 166         switch (num) {
 167         CASE_PIPExTRE(1);
 168         CASE_PIPExTRE(2);
 169         CASE_PIPExTRE(3);
 170         CASE_PIPExTRE(4);
 171         CASE_PIPExTRE(5);
 172         CASE_PIPExTRE(B);
 173         CASE_PIPExTRE(C);
 174         CASE_PIPExTRE(D);
 175         CASE_PIPExTRE(E);
 176         CASE_PIPExTRE(F);
 177         CASE_PIPExTRE(9);
 178         CASE_PIPExTRE(A);
 179         default:
 180                 dev_err(dev, "unknown pipe (%d)\n", num);
 181                 return;
 182         }
 183
 184         __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
 185 }
 186
 187 /*
 188  *              PIPEBUF
 189  */
 190 static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 191 {
 192         if (usbhs_pipe_is_dcp(pipe))
 193                 return;
 194
 195         __usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
 196 }
 197
 198 /*
 199  *              DCPMAXP/PIPEMAXP
 200  */
 201 static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 202 {
 203         __usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
 204 }
 205
 206 /*
 207  *              pipe control functions
 208  */
 209 static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
 210 {
 211         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 212
 213         /*
 214          * On pipe, this is necessary before
 215          * accesses to below registers.
 216          *
 217          * PIPESEL      : usbhsp_pipe_select
 218          * PIPECFG      : usbhsp_pipe_cfg_xxx
 219          * PIPEBUF      : usbhsp_pipe_buf_xxx
 220          * PIPEMAXP     : usbhsp_pipe_maxp_xxx
 221          * PIPEPERI
 222          */
 223
 224         /*
 225          * if pipe is dcp, no pipe is selected.
 226          * it is no problem, because dcp have its register
 227          */
 228         usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
 229 }
 230
 231 static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
 232 {
 233         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 234         int timeout = 1024;
 235         u16 mask = usbhs_mod_is_host(priv) ? (CSSTS | PID_MASK) : PID_MASK;
 236
 237         /*
 238          * make sure....
 239          *
 240          * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
 241          * specified by the CURPIPE bits.
 242          * When changing the setting of this bit after changing
 243          * the PID bits for the selected pipe from BUF to NAK,
 244          * check that CSSTS = 0 and PBUSY = 0.
 245          */
 246
 247         /*
 248          * CURPIPE bit = 0
 249          *
 250          * see also
 251          *  "Operation"
 252          *  - "Pipe Control"
 253          *   - "Pipe Control Registers Switching Procedure"
 254          */
 255         usbhs_write(priv, CFIFOSEL, 0);
 256         usbhs_pipe_disable(pipe);
 257
 258         do {
 259                 if (!(usbhsp_pipectrl_get(pipe) & mask))
 260                         return 0;
 261
 262                 udelay(10);
 263
 264         } while (timeout--);
 265
 266         return -EBUSY;
 267 }
 268
 269 int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe)
 270 {
 271         u16 val;
 272
 273         val = usbhsp_pipectrl_get(pipe);
 274         if (val & BSTS)
 275                 return 0;
 276
 277         return -EBUSY;
 278 }
 279
 280 /*
 281  *              PID ctrl
 282  */
 283 static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
 284 {
 285         u16 pid = usbhsp_pipectrl_get(pipe);
 286
 287         pid &= PID_MASK;
 288
 289         /*
 290          * see
 291          * "Pipe n Control Register" - "PID"
 292          */
 293         switch (pid) {
 294         case PID_STALL11:
 295                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
 296                 /* fall-through */
 297         case PID_STALL10:
 298                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
 299         }
 300 }
 301
 302 void usbhs_pipe_disable(struct usbhs_pipe *pipe)
 303 {
 304         int timeout = 1024;
 305         u16 val;
 306
 307         /* see "Pipe n Control Register" - "PID" */
 308         __usbhsp_pid_try_nak_if_stall(pipe);
 309
 310         usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
 311
 312         do {
 313                 val  = usbhsp_pipectrl_get(pipe);
 314                 val &= PBUSY;
 315                 if (!val)
 316                         break;
 317
 318                 udelay(10);
 319         } while (timeout--);
 320 }
 321
 322 void usbhs_pipe_enable(struct usbhs_pipe *pipe)
 323 {
 324         /* see "Pipe n Control Register" - "PID" */
 325         __usbhsp_pid_try_nak_if_stall(pipe);
 326
 327         usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
 328 }
 329
 330 void usbhs_pipe_stall(struct usbhs_pipe *pipe)
 331 {
 332         u16 pid = usbhsp_pipectrl_get(pipe);
 333
 334         pid &= PID_MASK;
 335
 336         /*
 337          * see
 338          * "Pipe n Control Register" - "PID"
 339          */
 340         switch (pid) {
 341         case PID_NAK:
 342                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
 343                 break;
 344         case PID_BUF:
 345                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
 346                 break;
 347         }
 348 }
 349
 350 int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
 351 {
 352         u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;
 353
 354         return (int)(pid == PID_STALL10 || pid == PID_STALL11);
 355 }
 356
 357 void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
 358 {
 359         if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 360                 return;
 361
 362         /*
 363          * clear and disable transfer counter for IN/OUT pipe
 364          */
 365         usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);
 366
 367         /*
 368          * Only IN direction bulk pipe can use transfer count.
 369          * Without using this function,
 370          * received data will break if it was large data size.
 371          * see PIPEnTRN/PIPEnTRE for detail
 372          */
 373         if (usbhs_pipe_is_dir_in(pipe)) {
 374                 int maxp = usbhs_pipe_get_maxpacket(pipe);
 375
 376                 usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
 377                 usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
 378         }
 379 }
 380
 381
 382 /*
 383  *              pipe setup
 384  */
 385 static int usbhsp_setup_pipecfg(struct usbhs_pipe *pipe, int is_host,
 386                                 int dir_in, u16 *pipecfg)
 387 {
 388         u16 type = 0;
 389         u16 bfre = 0;
 390         u16 dblb = 0;
 391         u16 cntmd = 0;
 392         u16 dir = 0;
 393         u16 epnum = 0;
 394         u16 shtnak = 0;
 395         static const u16 type_array[] = {
 396                 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
 397                 [USB_ENDPOINT_XFER_INT]  = TYPE_INT,
 398                 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
 399         };
 400
 401         if (usbhs_pipe_is_dcp(pipe))
 402                 return -EINVAL;
 403
 404         /*
 405          * PIPECFG
 406          *
 407          * see
 408          *  - "Register Descriptions" - "PIPECFG" register
 409          *  - "Features"  - "Pipe configuration"
 410          *  - "Operation" - "Pipe Control"
 411          */
 412
 413         /* TYPE */
 414         type = type_array[usbhs_pipe_type(pipe)];
 415
 416         /* BFRE */
 417         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
 418             usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 419                 bfre = 0; /* FIXME */
 420
 421         /* DBLB: see usbhs_pipe_config_update() */
 422
 423         /* CNTMD */
 424         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 425                 cntmd = 0; /* FIXME */
 426
 427         /* DIR */
 428         if (dir_in)
 429                 usbhsp_flags_set(pipe, IS_DIR_HOST);
 430
 431         if (!!is_host ^ !!dir_in)
 432                 dir |= DIR_OUT;
 433
 434         if (!dir)
 435                 usbhsp_flags_set(pipe, IS_DIR_IN);
 436
 437         /* SHTNAK */
 438         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
 439             !dir)
 440                 shtnak = SHTNAK;
 441
 442         /* EPNUM */
 443         epnum = 0; /* see usbhs_pipe_config_update() */
 444         *pipecfg = type         |
 445                    bfre         |
 446                    dblb         |
 447                    cntmd        |
 448                    dir          |
 449                    shtnak       |
 450                    epnum;
 451         return 0;
 452 }
 453
 454 static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)
 455 {
 456         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 457         struct device *dev = usbhs_priv_to_dev(priv);
 458         int pipe_num = usbhs_pipe_number(pipe);
 459         u16 buff_size;
 460         u16 bufnmb;
 461         u16 bufnmb_cnt;
 462         struct renesas_usbhs_driver_pipe_config *pipe_config =
 463                                         usbhsp_get_pipe_config(priv, pipe_num);
 464
 465         /*
 466          * PIPEBUF
 467          *
 468          * see
 469          *  - "Register Descriptions" - "PIPEBUF" register
 470          *  - "Features"  - "Pipe configuration"
 471          *  - "Operation" - "FIFO Buffer Memory"
 472          *  - "Operation" - "Pipe Control"
 473          */
 474         buff_size = pipe_config->bufsize;
 475         bufnmb = pipe_config->bufnum;
 476
 477         /* change buff_size to register value */
 478         bufnmb_cnt = (buff_size / 64) - 1;
 479
 480         dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
 481                 pipe_num, buff_size, bufnmb);
 482
 483         return  (0x1f & bufnmb_cnt)     << 10 |
 484                 (0xff & bufnmb)         <<  0;
 485 }
 486
 487 void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
 488                               u16 epnum, u16 maxp)
 489 {
 490         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 491         int pipe_num = usbhs_pipe_number(pipe);
 492         struct renesas_usbhs_driver_pipe_config *pipe_config =
 493                                         usbhsp_get_pipe_config(priv, pipe_num);
 494         u16 dblb = pipe_config->double_buf ? DBLB : 0;
 495
 496         if (devsel > 0xA) {
 497                 struct device *dev = usbhs_priv_to_dev(priv);
 498
 499                 dev_err(dev, "devsel error %d\n", devsel);
 500
 501                 devsel = 0;
 502         }
 503
 504         usbhsp_pipe_barrier(pipe);
 505
 506         pipe->maxp = maxp;
 507
 508         usbhsp_pipe_select(pipe);
 509         usbhsp_pipe_maxp_set(pipe, 0xFFFF,
 510                              (devsel << 12) |
 511                              maxp);
 512
 513         if (!usbhs_pipe_is_dcp(pipe))
 514                 usbhsp_pipe_cfg_set(pipe,  0x000F | DBLB, epnum | dblb);
 515 }
 516
 517 /*
 518  *              pipe control
 519  */
 520 int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
 521 {
 522         /*
 523          * see
 524          *      usbhs_pipe_config_update()
 525          *      usbhs_dcp_malloc()
 526          */
 527         return pipe->maxp;
 528 }
 529
 530 int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
 531 {
 532         return usbhsp_flags_has(pipe, IS_DIR_IN);
 533 }
 534
 535 int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
 536 {
 537         return usbhsp_flags_has(pipe, IS_DIR_HOST);
 538 }
 539
 540 int usbhs_pipe_is_running(struct usbhs_pipe *pipe)
 541 {
 542         return usbhsp_flags_has(pipe, IS_RUNNING);
 543 }
 544
 545 void usbhs_pipe_running(struct usbhs_pipe *pipe, int running)
 546 {
 547         if (running)
 548                 usbhsp_flags_set(pipe, IS_RUNNING);
 549         else
 550                 usbhsp_flags_clr(pipe, IS_RUNNING);
 551 }
 552
 553 void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
 554 {
 555         u16 mask = (SQCLR | SQSET);
 556         u16 val;
 557
 558         /*
 559          * sequence
 560          *  0  : data0
 561          *  1  : data1
 562          *  -1 : no change
 563          */
 564         switch (sequence) {
 565         case 0:
 566                 val = SQCLR;
 567                 break;
 568         case 1:
 569                 val = SQSET;
 570                 break;
 571         default:
 572                 return;
 573         }
 574
 575         usbhsp_pipectrl_set(pipe, mask, val);
 576 }
 577
 578 static int usbhs_pipe_get_data_sequence(struct usbhs_pipe *pipe)
 579 {
 580         return !!(usbhsp_pipectrl_get(pipe) & SQMON);
 581 }
 582
 583 void usbhs_pipe_clear(struct usbhs_pipe *pipe)
 584 {
 585         if (usbhs_pipe_is_dcp(pipe)) {
 586                 usbhs_fifo_clear_dcp(pipe);
 587         } else {
 588                 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
 589                 usbhsp_pipectrl_set(pipe, ACLRM, 0);
 590         }
 591 }
 592
 593 /* Should call usbhsp_pipe_select() before */
 594 void usbhs_pipe_clear_without_sequence(struct usbhs_pipe *pipe,
 595                                        int needs_bfre, int bfre_enable)
 596 {
 597         int sequence;
 598
 599         usbhsp_pipe_select(pipe);
 600         sequence = usbhs_pipe_get_data_sequence(pipe);
 601         if (needs_bfre)
 602                 usbhsp_pipe_cfg_set(pipe, BFRE, bfre_enable ? BFRE : 0);
 603         usbhs_pipe_clear(pipe);
 604         usbhs_pipe_data_sequence(pipe, sequence);
 605 }
 606
 607 void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
 608 {
 609         if (usbhs_pipe_is_dcp(pipe))
 610                 return;
 611
 612         usbhsp_pipe_select(pipe);
 613         /* check if the driver needs to change the BFRE value */
 614         if (!(enable ^ !!(usbhsp_pipe_cfg_get(pipe) & BFRE)))
 615                 return;
 616
 617         usbhs_pipe_clear_without_sequence(pipe, 1, enable);
 618 }
 619
 620 static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
 621 {
 622         struct usbhs_pipe *pos, *pipe;
 623         int i;
 624
 625         /*
 626          * find target pipe
 627          */
 628         pipe = NULL;
 629         usbhs_for_each_pipe_with_dcp(pos, priv, i) {
 630                 if (!usbhs_pipe_type_is(pos, type))
 631                         continue;
 632                 if (usbhsp_flags_has(pos, IS_USED))
 633                         continue;
 634
 635                 pipe = pos;
 636                 break;
 637         }
 638
 639         if (!pipe)
 640                 return NULL;
 641
 642         /*
 643          * initialize pipe flags
 644          */
 645         usbhsp_flags_init(pipe);
 646         usbhsp_flags_set(pipe, IS_USED);
 647
 648         return pipe;
 649 }
 650
 651 static void usbhsp_put_pipe(struct usbhs_pipe *pipe)
 652 {
 653         usbhsp_flags_init(pipe);
 654 }
 655
 656 void usbhs_pipe_init(struct usbhs_priv *priv,
 657                      int (*dma_map_ctrl)(struct device *dma_dev,
 658                                          struct usbhs_pkt *pkt, int map))
 659 {
 660         struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
 661         struct usbhs_pipe *pipe;
 662         int i;
 663
 664         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 665                 usbhsp_flags_init(pipe);
 666                 pipe->fifo = NULL;
 667                 pipe->mod_private = NULL;
 668                 INIT_LIST_HEAD(&pipe->list);
 669
 670                 /* pipe force init */
 671                 usbhs_pipe_clear(pipe);
 672         }
 673
 674         info->dma_map_ctrl = dma_map_ctrl;
 675 }
 676
 677 struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
 678                                      int endpoint_type,
 679                                      int dir_in)
 680 {
 681         struct device *dev = usbhs_priv_to_dev(priv);
 682         struct usbhs_pipe *pipe;
 683         int is_host = usbhs_mod_is_host(priv);
 684         int ret;
 685         u16 pipecfg, pipebuf;
 686
 687         pipe = usbhsp_get_pipe(priv, endpoint_type);
 688         if (!pipe) {
 689                 dev_err(dev, "can't get pipe (%s)\n",
 690                         usbhsp_pipe_name[endpoint_type]);
 691                 return NULL;
 692         }
 693
 694         INIT_LIST_HEAD(&pipe->list);
 695
 696         usbhs_pipe_disable(pipe);
 697
 698         /* make sure pipe is not busy */
 699         ret = usbhsp_pipe_barrier(pipe);
 700         if (ret < 0) {
 701                 dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
 702                 return NULL;
 703         }
 704
 705         if (usbhsp_setup_pipecfg(pipe, is_host, dir_in, &pipecfg)) {
 706                 dev_err(dev, "can't setup pipe\n");
 707                 return NULL;
 708         }
 709
 710         pipebuf  = usbhsp_setup_pipebuff(pipe);
 711
 712         usbhsp_pipe_select(pipe);
 713         usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
 714         usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
 715         usbhs_pipe_clear(pipe);
 716
 717         usbhs_pipe_sequence_data0(pipe);
 718
 719         dev_dbg(dev, "enable pipe %d : %s (%s)\n",
 720                 usbhs_pipe_number(pipe),
 721                 usbhs_pipe_name(pipe),
 722                 usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
 723
 724         /*
 725          * epnum / maxp are still not set to this pipe.
 726          * call usbhs_pipe_config_update() after this function !!
 727          */
 728
 729         return pipe;
 730 }
 731
 732 void usbhs_pipe_free(struct usbhs_pipe *pipe)
 733 {
 734         usbhsp_put_pipe(pipe);
 735 }
 736
 737 void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
 738 {
 739         if (pipe->fifo)
 740                 pipe->fifo->pipe = NULL;
 741
 742         pipe->fifo = fifo;
 743
 744         if (fifo)
 745                 fifo->pipe = pipe;
 746 }
 747
 748
 749 /*
 750  *              dcp control
 751  */
 752 struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
 753 {
 754         struct usbhs_pipe *pipe;
 755
 756         pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
 757         if (!pipe)
 758                 return NULL;
 759
 760         INIT_LIST_HEAD(&pipe->list);
 761
 762         /*
 763          * call usbhs_pipe_config_update() after this function !!
 764          */
 765
 766         return pipe;
 767 }
 768
 769 void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
 770 {
 771         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 772
 773         WARN_ON(!usbhs_pipe_is_dcp(pipe));
 774
 775         usbhs_pipe_enable(pipe);
 776
 777         if (!usbhs_mod_is_host(priv)) /* funconly */
 778                 usbhsp_pipectrl_set(pipe, CCPL, CCPL);
 779 }
 780
 781 void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
 782 {
 783         usbhsp_pipe_cfg_set(pipe, DIR_OUT,
 784                             dir_out ? DIR_OUT : 0);
 785 }
 786
 787 /*
 788  *              pipe module function
 789  */
 790 int usbhs_pipe_probe(struct usbhs_priv *priv)
 791 {
 792         struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
 793         struct usbhs_pipe *pipe;
 794         struct device *dev = usbhs_priv_to_dev(priv);
 795         struct renesas_usbhs_driver_pipe_config *pipe_configs =
 796                                         usbhs_get_dparam(priv, pipe_configs);
 797         int pipe_size = usbhs_get_dparam(priv, pipe_size);
 798         int i;
 799
 800         /* This driver expects 1st pipe is DCP */
 801         if (pipe_configs[0].type != USB_ENDPOINT_XFER_CONTROL) {
 802                 dev_err(dev, "1st PIPE is not DCP\n");
 803                 return -EINVAL;
 804         }
 805
 806         info->pipe = kcalloc(pipe_size, sizeof(struct usbhs_pipe),
 807                              GFP_KERNEL);
 808         if (!info->pipe)
 809                 return -ENOMEM;
 810
 811         info->size = pipe_size;
 812
 813         /*
 814          * init pipe
 815          */
 816         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 817                 pipe->priv = priv;
 818
 819                 usbhs_pipe_type(pipe) =
 820                         pipe_configs[i].type & USB_ENDPOINT_XFERTYPE_MASK;
 821
 822                 dev_dbg(dev, "pipe %x\t: %s\n",
 823                         i, usbhsp_pipe_name[pipe_configs[i].type]);
 824         }
 825
 826         return 0;
 827 }
 828
 829 void usbhs_pipe_remove(struct usbhs_priv *priv)
 830 {
 831         struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
 832
 833         kfree(info->pipe);
 834 }