drivers/usb/renesas_usbhs/pipe.c

   1 /*
   2  * Renesas USB driver
   3  *
   4  * Copyright (C) 2011 Renesas Solutions Corp.
   5  * Kuninori Morimoto <[email protected]>
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program; if not, write to the Free Software
  14  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  15  *
  16  */
  17 #include <linux/delay.h>
  18 #include <linux/slab.h>
  19 #include "common.h"
  20 #include "pipe.h"
  21
  22 /*
  23  *              macros
  24  */
  25 #define usbhsp_addr_offset(p)   ((usbhs_pipe_number(p) - 1) * 2)
  26
  27 #define usbhsp_flags_set(p, f)  ((p)->flags |=  USBHS_PIPE_FLAGS_##f)
  28 #define usbhsp_flags_clr(p, f)  ((p)->flags &= ~USBHS_PIPE_FLAGS_##f)
  29 #define usbhsp_flags_has(p, f)  ((p)->flags &   USBHS_PIPE_FLAGS_##f)
  30 #define usbhsp_flags_init(p)    do {(p)->flags = 0; } while (0)
  31
  32 /*
  33  * for debug
  34  */
  35 static char *usbhsp_pipe_name[] = {
  36         [USB_ENDPOINT_XFER_CONTROL]     = "DCP",
  37         [USB_ENDPOINT_XFER_BULK]        = "BULK",
  38         [USB_ENDPOINT_XFER_INT]         = "INT",
  39         [USB_ENDPOINT_XFER_ISOC]        = "ISO",
  40 };
  41
  42 char *usbhs_pipe_name(struct usbhs_pipe *pipe)
  43 {
  44         return usbhsp_pipe_name[usbhs_pipe_type(pipe)];
  45 }
  46
  47 static struct renesas_usbhs_driver_pipe_config
  48 *usbhsp_get_pipe_config(struct usbhs_priv *priv, int pipe_num)
  49 {
  50         struct renesas_usbhs_driver_pipe_config *pipe_configs =
  51                                         usbhs_get_dparam(priv, pipe_configs);
  52
  53         return &pipe_configs[pipe_num];
  54 }
  55
  56 /*
  57  *              DCPCTR/PIPEnCTR functions
  58  */
  59 static void usbhsp_pipectrl_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
  60 {
  61         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
  62         int offset = usbhsp_addr_offset(pipe);
  63
  64         if (usbhs_pipe_is_dcp(pipe))
  65                 usbhs_bset(priv, DCPCTR, mask, val);
  66         else
  67                 usbhs_bset(priv, PIPEnCTR + offset, mask, val);
  68 }
  69
  70 static u16 usbhsp_pipectrl_get(struct usbhs_pipe *pipe)
  71 {
  72         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
  73         int offset = usbhsp_addr_offset(pipe);
  74
  75         if (usbhs_pipe_is_dcp(pipe))
  76                 return usbhs_read(priv, DCPCTR);
  77         else
  78                 return usbhs_read(priv, PIPEnCTR + offset);
  79 }
  80
  81 /*
  82  *              DCP/PIPE functions
  83  */
  84 static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
  85                                   u16 dcp_reg, u16 pipe_reg,
  86                                   u16 mask, u16 val)
  87 {
  88         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
  89
  90         if (usbhs_pipe_is_dcp(pipe))
  91                 usbhs_bset(priv, dcp_reg, mask, val);
  92         else
  93                 usbhs_bset(priv, pipe_reg, mask, val);
  94 }
  95
  96 static u16 __usbhsp_pipe_xxx_get(struct usbhs_pipe *pipe,
  97                                  u16 dcp_reg, u16 pipe_reg)
  98 {
  99         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 100
 101         if (usbhs_pipe_is_dcp(pipe))
 102                 return usbhs_read(priv, dcp_reg);
 103         else
 104                 return usbhs_read(priv, pipe_reg);
 105 }
 106
 107 /*
 108  *              DCPCFG/PIPECFG functions
 109  */
 110 static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 111 {
 112         __usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
 113 }
 114
 115 static u16 usbhsp_pipe_cfg_get(struct usbhs_pipe *pipe)
 116 {
 117         return __usbhsp_pipe_xxx_get(pipe, DCPCFG, PIPECFG);
 118 }
 119
 120 /*
 121  *              PIPEnTRN/PIPEnTRE functions
 122  */
 123 static void usbhsp_pipe_trn_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 124 {
 125         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 126         struct device *dev = usbhs_priv_to_dev(priv);
 127         int num = usbhs_pipe_number(pipe);
 128         u16 reg;
 129
 130         /*
 131          * It is impossible to calculate address,
 132          * since PIPEnTRN addresses were mapped randomly.
 133          */
 134 #define CASE_PIPExTRN(a)                \
 135         case 0x ## a:                   \
 136                 reg = PIPE ## a ## TRN; \
 137                 break;
 138
 139         switch (num) {
 140         CASE_PIPExTRN(1);
 141         CASE_PIPExTRN(2);
 142         CASE_PIPExTRN(3);
 143         CASE_PIPExTRN(4);
 144         CASE_PIPExTRN(5);
 145         CASE_PIPExTRN(B);
 146         CASE_PIPExTRN(C);
 147         CASE_PIPExTRN(D);
 148         CASE_PIPExTRN(E);
 149         CASE_PIPExTRN(F);
 150         CASE_PIPExTRN(9);
 151         CASE_PIPExTRN(A);
 152         default:
 153                 dev_err(dev, "unknown pipe (%d)\n", num);
 154                 return;
 155         }
 156         __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
 157 }
 158
 159 static void usbhsp_pipe_tre_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 160 {
 161         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 162         struct device *dev = usbhs_priv_to_dev(priv);
 163         int num = usbhs_pipe_number(pipe);
 164         u16 reg;
 165
 166         /*
 167          * It is impossible to calculate address,
 168          * since PIPEnTRE addresses were mapped randomly.
 169          */
 170 #define CASE_PIPExTRE(a)                        \
 171         case 0x ## a:                           \
 172                 reg = PIPE ## a ## TRE;         \
 173                 break;
 174
 175         switch (num) {
 176         CASE_PIPExTRE(1);
 177         CASE_PIPExTRE(2);
 178         CASE_PIPExTRE(3);
 179         CASE_PIPExTRE(4);
 180         CASE_PIPExTRE(5);
 181         CASE_PIPExTRE(B);
 182         CASE_PIPExTRE(C);
 183         CASE_PIPExTRE(D);
 184         CASE_PIPExTRE(E);
 185         CASE_PIPExTRE(F);
 186         CASE_PIPExTRE(9);
 187         CASE_PIPExTRE(A);
 188         default:
 189                 dev_err(dev, "unknown pipe (%d)\n", num);
 190                 return;
 191         }
 192
 193         __usbhsp_pipe_xxx_set(pipe, 0, reg, mask, val);
 194 }
 195
 196 /*
 197  *              PIPEBUF
 198  */
 199 static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 200 {
 201         if (usbhs_pipe_is_dcp(pipe))
 202                 return;
 203
 204         __usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
 205 }
 206
 207 /*
 208  *              DCPMAXP/PIPEMAXP
 209  */
 210 static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 211 {
 212         __usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
 213 }
 214
 215 /*
 216  *              pipe control functions
 217  */
 218 static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
 219 {
 220         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 221
 222         /*
 223          * On pipe, this is necessary before
 224          * accesses to below registers.
 225          *
 226          * PIPESEL      : usbhsp_pipe_select
 227          * PIPECFG      : usbhsp_pipe_cfg_xxx
 228          * PIPEBUF      : usbhsp_pipe_buf_xxx
 229          * PIPEMAXP     : usbhsp_pipe_maxp_xxx
 230          * PIPEPERI
 231          */
 232
 233         /*
 234          * if pipe is dcp, no pipe is selected.
 235          * it is no problem, because dcp have its register
 236          */
 237         usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
 238 }
 239
 240 static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
 241 {
 242         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 243         int timeout = 1024;
 244         u16 mask = usbhs_mod_is_host(priv) ? (CSSTS | PID_MASK) : PID_MASK;
 245
 246         /*
 247          * make sure....
 248          *
 249          * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
 250          * specified by the CURPIPE bits.
 251          * When changing the setting of this bit after changing
 252          * the PID bits for the selected pipe from BUF to NAK,
 253          * check that CSSTS = 0 and PBUSY = 0.
 254          */
 255
 256         /*
 257          * CURPIPE bit = 0
 258          *
 259          * see also
 260          *  "Operation"
 261          *  - "Pipe Control"
 262          *   - "Pipe Control Registers Switching Procedure"
 263          */
 264         usbhs_write(priv, CFIFOSEL, 0);
 265         usbhs_pipe_disable(pipe);
 266
 267         do {
 268                 if (!(usbhsp_pipectrl_get(pipe) & mask))
 269                         return 0;
 270
 271                 udelay(10);
 272
 273         } while (timeout--);
 274
 275         return -EBUSY;
 276 }
 277
 278 int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe)
 279 {
 280         u16 val;
 281
 282         val = usbhsp_pipectrl_get(pipe);
 283         if (val & BSTS)
 284                 return 0;
 285
 286         return -EBUSY;
 287 }
 288
 289 /*
 290  *              PID ctrl
 291  */
 292 static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
 293 {
 294         u16 pid = usbhsp_pipectrl_get(pipe);
 295
 296         pid &= PID_MASK;
 297
 298         /*
 299          * see
 300          * "Pipe n Control Register" - "PID"
 301          */
 302         switch (pid) {
 303         case PID_STALL11:
 304                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
 305                 /* fall-through */
 306         case PID_STALL10:
 307                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
 308         }
 309 }
 310
 311 void usbhs_pipe_disable(struct usbhs_pipe *pipe)
 312 {
 313         int timeout = 1024;
 314         u16 val;
 315
 316         /* see "Pipe n Control Register" - "PID" */
 317         __usbhsp_pid_try_nak_if_stall(pipe);
 318
 319         usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
 320
 321         do {
 322                 val  = usbhsp_pipectrl_get(pipe);
 323                 val &= PBUSY;
 324                 if (!val)
 325                         break;
 326
 327                 udelay(10);
 328         } while (timeout--);
 329 }
 330
 331 void usbhs_pipe_enable(struct usbhs_pipe *pipe)
 332 {
 333         /* see "Pipe n Control Register" - "PID" */
 334         __usbhsp_pid_try_nak_if_stall(pipe);
 335
 336         usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
 337 }
 338
 339 void usbhs_pipe_stall(struct usbhs_pipe *pipe)
 340 {
 341         u16 pid = usbhsp_pipectrl_get(pipe);
 342
 343         pid &= PID_MASK;
 344
 345         /*
 346          * see
 347          * "Pipe n Control Register" - "PID"
 348          */
 349         switch (pid) {
 350         case PID_NAK:
 351                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
 352                 break;
 353         case PID_BUF:
 354                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
 355                 break;
 356         }
 357 }
 358
 359 int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
 360 {
 361         u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;
 362
 363         return (int)(pid == PID_STALL10 || pid == PID_STALL11);
 364 }
 365
 366 void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
 367 {
 368         if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 369                 return;
 370
 371         /*
 372          * clear and disable transfer counter for IN/OUT pipe
 373          */
 374         usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);
 375
 376         /*
 377          * Only IN direction bulk pipe can use transfer count.
 378          * Without using this function,
 379          * received data will break if it was large data size.
 380          * see PIPEnTRN/PIPEnTRE for detail
 381          */
 382         if (usbhs_pipe_is_dir_in(pipe)) {
 383                 int maxp = usbhs_pipe_get_maxpacket(pipe);
 384
 385                 usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
 386                 usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
 387         }
 388 }
 389
 390
 391 /*
 392  *              pipe setup
 393  */
 394 static int usbhsp_setup_pipecfg(struct usbhs_pipe *pipe, int is_host,
 395                                 int dir_in, u16 *pipecfg)
 396 {
 397         u16 type = 0;
 398         u16 bfre = 0;
 399         u16 dblb = 0;
 400         u16 cntmd = 0;
 401         u16 dir = 0;
 402         u16 epnum = 0;
 403         u16 shtnak = 0;
 404         u16 type_array[] = {
 405                 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
 406                 [USB_ENDPOINT_XFER_INT]  = TYPE_INT,
 407                 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
 408         };
 409
 410         if (usbhs_pipe_is_dcp(pipe))
 411                 return -EINVAL;
 412
 413         /*
 414          * PIPECFG
 415          *
 416          * see
 417          *  - "Register Descriptions" - "PIPECFG" register
 418          *  - "Features"  - "Pipe configuration"
 419          *  - "Operation" - "Pipe Control"
 420          */
 421
 422         /* TYPE */
 423         type = type_array[usbhs_pipe_type(pipe)];
 424
 425         /* BFRE */
 426         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
 427             usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 428                 bfre = 0; /* FIXME */
 429
 430         /* DBLB: see usbhs_pipe_config_update() */
 431
 432         /* CNTMD */
 433         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 434                 cntmd = 0; /* FIXME */
 435
 436         /* DIR */
 437         if (dir_in)
 438                 usbhsp_flags_set(pipe, IS_DIR_HOST);
 439
 440         if (!!is_host ^ !!dir_in)
 441                 dir |= DIR_OUT;
 442
 443         if (!dir)
 444                 usbhsp_flags_set(pipe, IS_DIR_IN);
 445
 446         /* SHTNAK */
 447         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
 448             !dir)
 449                 shtnak = SHTNAK;
 450
 451         /* EPNUM */
 452         epnum = 0; /* see usbhs_pipe_config_update() */
 453         *pipecfg = type         |
 454                    bfre         |
 455                    dblb         |
 456                    cntmd        |
 457                    dir          |
 458                    shtnak       |
 459                    epnum;
 460         return 0;
 461 }
 462
 463 static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)
 464 {
 465         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 466         struct device *dev = usbhs_priv_to_dev(priv);
 467         int pipe_num = usbhs_pipe_number(pipe);
 468         u16 buff_size;
 469         u16 bufnmb;
 470         u16 bufnmb_cnt;
 471         struct renesas_usbhs_driver_pipe_config *pipe_config =
 472                                         usbhsp_get_pipe_config(priv, pipe_num);
 473
 474         /*
 475          * PIPEBUF
 476          *
 477          * see
 478          *  - "Register Descriptions" - "PIPEBUF" register
 479          *  - "Features"  - "Pipe configuration"
 480          *  - "Operation" - "FIFO Buffer Memory"
 481          *  - "Operation" - "Pipe Control"
 482          */
 483         buff_size = pipe_config->bufsize;
 484         bufnmb = pipe_config->bufnum;
 485
 486         /* change buff_size to register value */
 487         bufnmb_cnt = (buff_size / 64) - 1;
 488
 489         dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
 490                 pipe_num, buff_size, bufnmb);
 491
 492         return  (0x1f & bufnmb_cnt)     << 10 |
 493                 (0xff & bufnmb)         <<  0;
 494 }
 495
 496 void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
 497                               u16 epnum, u16 maxp)
 498 {
 499         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 500         int pipe_num = usbhs_pipe_number(pipe);
 501         struct renesas_usbhs_driver_pipe_config *pipe_config =
 502                                         usbhsp_get_pipe_config(priv, pipe_num);
 503         u16 dblb = pipe_config->double_buf ? DBLB : 0;
 504
 505         if (devsel > 0xA) {
 506                 struct device *dev = usbhs_priv_to_dev(priv);
 507
 508                 dev_err(dev, "devsel error %d\n", devsel);
 509
 510                 devsel = 0;
 511         }
 512
 513         usbhsp_pipe_barrier(pipe);
 514
 515         pipe->maxp = maxp;
 516
 517         usbhsp_pipe_select(pipe);
 518         usbhsp_pipe_maxp_set(pipe, 0xFFFF,
 519                              (devsel << 12) |
 520                              maxp);
 521
 522         if (!usbhs_pipe_is_dcp(pipe))
 523                 usbhsp_pipe_cfg_set(pipe,  0x000F | DBLB, epnum | dblb);
 524 }
 525
 526 /*
 527  *              pipe control
 528  */
 529 int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
 530 {
 531         /*
 532          * see
 533          *      usbhs_pipe_config_update()
 534          *      usbhs_dcp_malloc()
 535          */
 536         return pipe->maxp;
 537 }
 538
 539 int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
 540 {
 541         return usbhsp_flags_has(pipe, IS_DIR_IN);
 542 }
 543
 544 int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
 545 {
 546         return usbhsp_flags_has(pipe, IS_DIR_HOST);
 547 }
 548
 549 int usbhs_pipe_is_running(struct usbhs_pipe *pipe)
 550 {
 551         return usbhsp_flags_has(pipe, IS_RUNNING);
 552 }
 553
 554 void usbhs_pipe_running(struct usbhs_pipe *pipe, int running)
 555 {
 556         if (running)
 557                 usbhsp_flags_set(pipe, IS_RUNNING);
 558         else
 559                 usbhsp_flags_clr(pipe, IS_RUNNING);
 560 }
 561
 562 void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
 563 {
 564         u16 mask = (SQCLR | SQSET);
 565         u16 val;
 566
 567         /*
 568          * sequence
 569          *  0  : data0
 570          *  1  : data1
 571          *  -1 : no change
 572          */
 573         switch (sequence) {
 574         case 0:
 575                 val = SQCLR;
 576                 break;
 577         case 1:
 578                 val = SQSET;
 579                 break;
 580         default:
 581                 return;
 582         }
 583
 584         usbhsp_pipectrl_set(pipe, mask, val);
 585 }
 586
 587 static int usbhs_pipe_get_data_sequence(struct usbhs_pipe *pipe)
 588 {
 589         return !!(usbhsp_pipectrl_get(pipe) & SQMON);
 590 }
 591
 592 void usbhs_pipe_clear(struct usbhs_pipe *pipe)
 593 {
 594         if (usbhs_pipe_is_dcp(pipe)) {
 595                 usbhs_fifo_clear_dcp(pipe);
 596         } else {
 597                 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
 598                 usbhsp_pipectrl_set(pipe, ACLRM, 0);
 599         }
 600 }
 601
 602 void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
 603 {
 604         int sequence;
 605
 606         if (usbhs_pipe_is_dcp(pipe))
 607                 return;
 608
 609         usbhsp_pipe_select(pipe);
 610         /* check if the driver needs to change the BFRE value */
 611         if (!(enable ^ !!(usbhsp_pipe_cfg_get(pipe) & BFRE)))
 612                 return;
 613
 614         sequence = usbhs_pipe_get_data_sequence(pipe);
 615         usbhsp_pipe_cfg_set(pipe, BFRE, enable ? BFRE : 0);
 616         usbhs_pipe_clear(pipe);
 617         usbhs_pipe_data_sequence(pipe, sequence);
 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 = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
 807         if (!info->pipe)
 808                 return -ENOMEM;
 809
 810         info->size = pipe_size;
 811
 812         /*
 813          * init pipe
 814          */
 815         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 816                 pipe->priv = priv;
 817
 818                 usbhs_pipe_type(pipe) =
 819                         pipe_configs[i].type & USB_ENDPOINT_XFERTYPE_MASK;
 820
 821                 dev_dbg(dev, "pipe %x\t: %s\n",
 822                         i, usbhsp_pipe_name[pipe_configs[i].type]);
 823         }
 824
 825         return 0;
 826 }
 827
 828 void usbhs_pipe_remove(struct usbhs_priv *priv)
 829 {
 830         struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
 831
 832         kfree(info->pipe);
 833 }