drivers/usb/renesas_usbhs/pipe.c

   1 /*
   2  * Renesas USB driver
   3  *
   4  * Copyright (C) 2011 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   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 u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
 395                                 int is_host,
 396                                 int dir_in)
 397 {
 398         u16 type = 0;
 399         u16 bfre = 0;
 400         u16 dblb = 0;
 401         u16 cntmd = 0;
 402         u16 dir = 0;
 403         u16 epnum = 0;
 404         u16 shtnak = 0;
 405         u16 type_array[] = {
 406                 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
 407                 [USB_ENDPOINT_XFER_INT]  = TYPE_INT,
 408                 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
 409         };
 410
 411         if (usbhs_pipe_is_dcp(pipe))
 412                 return -EINVAL;
 413
 414         /*
 415          * PIPECFG
 416          *
 417          * see
 418          *  - "Register Descriptions" - "PIPECFG" register
 419          *  - "Features"  - "Pipe configuration"
 420          *  - "Operation" - "Pipe Control"
 421          */
 422
 423         /* TYPE */
 424         type = type_array[usbhs_pipe_type(pipe)];
 425
 426         /* BFRE */
 427         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
 428             usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 429                 bfre = 0; /* FIXME */
 430
 431         /* DBLB: see usbhs_pipe_config_update() */
 432
 433         /* CNTMD */
 434         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 435                 cntmd = 0; /* FIXME */
 436
 437         /* DIR */
 438         if (dir_in)
 439                 usbhsp_flags_set(pipe, IS_DIR_HOST);
 440
 441         if (!!is_host ^ !!dir_in)
 442                 dir |= DIR_OUT;
 443
 444         if (!dir)
 445                 usbhsp_flags_set(pipe, IS_DIR_IN);
 446
 447         /* SHTNAK */
 448         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
 449             !dir)
 450                 shtnak = SHTNAK;
 451
 452         /* EPNUM */
 453         epnum = 0; /* see usbhs_pipe_config_update() */
 454
 455         return  type    |
 456                 bfre    |
 457                 dblb    |
 458                 cntmd   |
 459                 dir     |
 460                 shtnak  |
 461                 epnum;
 462 }
 463
 464 static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)
 465 {
 466         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 467         struct device *dev = usbhs_priv_to_dev(priv);
 468         int pipe_num = usbhs_pipe_number(pipe);
 469         u16 buff_size;
 470         u16 bufnmb;
 471         u16 bufnmb_cnt;
 472         struct renesas_usbhs_driver_pipe_config *pipe_config =
 473                                         usbhsp_get_pipe_config(priv, pipe_num);
 474
 475         /*
 476          * PIPEBUF
 477          *
 478          * see
 479          *  - "Register Descriptions" - "PIPEBUF" register
 480          *  - "Features"  - "Pipe configuration"
 481          *  - "Operation" - "FIFO Buffer Memory"
 482          *  - "Operation" - "Pipe Control"
 483          */
 484         buff_size = pipe_config->bufsize;
 485         bufnmb = pipe_config->bufnum;
 486
 487         /* change buff_size to register value */
 488         bufnmb_cnt = (buff_size / 64) - 1;
 489
 490         dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
 491                 pipe_num, buff_size, bufnmb);
 492
 493         return  (0x1f & bufnmb_cnt)     << 10 |
 494                 (0xff & bufnmb)         <<  0;
 495 }
 496
 497 void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
 498                               u16 epnum, u16 maxp)
 499 {
 500         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 501         int pipe_num = usbhs_pipe_number(pipe);
 502         struct renesas_usbhs_driver_pipe_config *pipe_config =
 503                                         usbhsp_get_pipe_config(priv, pipe_num);
 504         u16 dblb = pipe_config->double_buf ? DBLB : 0;
 505
 506         if (devsel > 0xA) {
 507                 struct device *dev = usbhs_priv_to_dev(priv);
 508
 509                 dev_err(dev, "devsel error %d\n", devsel);
 510
 511                 devsel = 0;
 512         }
 513
 514         usbhsp_pipe_barrier(pipe);
 515
 516         pipe->maxp = maxp;
 517
 518         usbhsp_pipe_select(pipe);
 519         usbhsp_pipe_maxp_set(pipe, 0xFFFF,
 520                              (devsel << 12) |
 521                              maxp);
 522
 523         if (!usbhs_pipe_is_dcp(pipe))
 524                 usbhsp_pipe_cfg_set(pipe,  0x000F | DBLB, epnum | dblb);
 525 }
 526
 527 /*
 528  *              pipe control
 529  */
 530 int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
 531 {
 532         /*
 533          * see
 534          *      usbhs_pipe_config_update()
 535          *      usbhs_dcp_malloc()
 536          */
 537         return pipe->maxp;
 538 }
 539
 540 int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
 541 {
 542         return usbhsp_flags_has(pipe, IS_DIR_IN);
 543 }
 544
 545 int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
 546 {
 547         return usbhsp_flags_has(pipe, IS_DIR_HOST);
 548 }
 549
 550 int usbhs_pipe_is_running(struct usbhs_pipe *pipe)
 551 {
 552         return usbhsp_flags_has(pipe, IS_RUNNING);
 553 }
 554
 555 void usbhs_pipe_running(struct usbhs_pipe *pipe, int running)
 556 {
 557         if (running)
 558                 usbhsp_flags_set(pipe, IS_RUNNING);
 559         else
 560                 usbhsp_flags_clr(pipe, IS_RUNNING);
 561 }
 562
 563 void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
 564 {
 565         u16 mask = (SQCLR | SQSET);
 566         u16 val;
 567
 568         /*
 569          * sequence
 570          *  0  : data0
 571          *  1  : data1
 572          *  -1 : no change
 573          */
 574         switch (sequence) {
 575         case 0:
 576                 val = SQCLR;
 577                 break;
 578         case 1:
 579                 val = SQSET;
 580                 break;
 581         default:
 582                 return;
 583         }
 584
 585         usbhsp_pipectrl_set(pipe, mask, val);
 586 }
 587
 588 static int usbhs_pipe_get_data_sequence(struct usbhs_pipe *pipe)
 589 {
 590         return !!(usbhsp_pipectrl_get(pipe) & SQMON);
 591 }
 592
 593 void usbhs_pipe_clear(struct usbhs_pipe *pipe)
 594 {
 595         if (usbhs_pipe_is_dcp(pipe)) {
 596                 usbhs_fifo_clear_dcp(pipe);
 597         } else {
 598                 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
 599                 usbhsp_pipectrl_set(pipe, ACLRM, 0);
 600         }
 601 }
 602
 603 void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
 604 {
 605         int sequence;
 606
 607         if (usbhs_pipe_is_dcp(pipe))
 608                 return;
 609
 610         usbhsp_pipe_select(pipe);
 611         /* check if the driver needs to change the BFRE value */
 612         if (!(enable ^ !!(usbhsp_pipe_cfg_get(pipe) & BFRE)))
 613                 return;
 614
 615         sequence = usbhs_pipe_get_data_sequence(pipe);
 616         usbhsp_pipe_cfg_set(pipe, BFRE, enable ? BFRE : 0);
 617         usbhs_pipe_clear(pipe);
 618         usbhs_pipe_data_sequence(pipe, sequence);
 619 }
 620
 621 static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
 622 {
 623         struct usbhs_pipe *pos, *pipe;
 624         int i;
 625
 626         /*
 627          * find target pipe
 628          */
 629         pipe = NULL;
 630         usbhs_for_each_pipe_with_dcp(pos, priv, i) {
 631                 if (!usbhs_pipe_type_is(pos, type))
 632                         continue;
 633                 if (usbhsp_flags_has(pos, IS_USED))
 634                         continue;
 635
 636                 pipe = pos;
 637                 break;
 638         }
 639
 640         if (!pipe)
 641                 return NULL;
 642
 643         /*
 644          * initialize pipe flags
 645          */
 646         usbhsp_flags_init(pipe);
 647         usbhsp_flags_set(pipe, IS_USED);
 648
 649         return pipe;
 650 }
 651
 652 static void usbhsp_put_pipe(struct usbhs_pipe *pipe)
 653 {
 654         usbhsp_flags_init(pipe);
 655 }
 656
 657 void usbhs_pipe_init(struct usbhs_priv *priv,
 658                      int (*dma_map_ctrl)(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         pipecfg  = usbhsp_setup_pipecfg(pipe, is_host, dir_in);
 706         pipebuf  = usbhsp_setup_pipebuff(pipe);
 707
 708         usbhsp_pipe_select(pipe);
 709         usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
 710         usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
 711         usbhs_pipe_clear(pipe);
 712
 713         usbhs_pipe_sequence_data0(pipe);
 714
 715         dev_dbg(dev, "enable pipe %d : %s (%s)\n",
 716                 usbhs_pipe_number(pipe),
 717                 usbhs_pipe_name(pipe),
 718                 usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
 719
 720         /*
 721          * epnum / maxp are still not set to this pipe.
 722          * call usbhs_pipe_config_update() after this function !!
 723          */
 724
 725         return pipe;
 726 }
 727
 728 void usbhs_pipe_free(struct usbhs_pipe *pipe)
 729 {
 730         usbhsp_put_pipe(pipe);
 731 }
 732
 733 void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
 734 {
 735         if (pipe->fifo)
 736                 pipe->fifo->pipe = NULL;
 737
 738         pipe->fifo = fifo;
 739
 740         if (fifo)
 741                 fifo->pipe = pipe;
 742 }
 743
 744
 745 /*
 746  *              dcp control
 747  */
 748 struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
 749 {
 750         struct usbhs_pipe *pipe;
 751
 752         pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
 753         if (!pipe)
 754                 return NULL;
 755
 756         INIT_LIST_HEAD(&pipe->list);
 757
 758         /*
 759          * call usbhs_pipe_config_update() after this function !!
 760          */
 761
 762         return pipe;
 763 }
 764
 765 void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
 766 {
 767         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 768
 769         WARN_ON(!usbhs_pipe_is_dcp(pipe));
 770
 771         usbhs_pipe_enable(pipe);
 772
 773         if (!usbhs_mod_is_host(priv)) /* funconly */
 774                 usbhsp_pipectrl_set(pipe, CCPL, CCPL);
 775 }
 776
 777 void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
 778 {
 779         usbhsp_pipe_cfg_set(pipe, DIR_OUT,
 780                             dir_out ? DIR_OUT : 0);
 781 }
 782
 783 /*
 784  *              pipe module function
 785  */
 786 int usbhs_pipe_probe(struct usbhs_priv *priv)
 787 {
 788         struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
 789         struct usbhs_pipe *pipe;
 790         struct device *dev = usbhs_priv_to_dev(priv);
 791         struct renesas_usbhs_driver_pipe_config *pipe_configs =
 792                                         usbhs_get_dparam(priv, pipe_configs);
 793         int pipe_size = usbhs_get_dparam(priv, pipe_size);
 794         int i;
 795
 796         /* This driver expects 1st pipe is DCP */
 797         if (pipe_configs[0].type != USB_ENDPOINT_XFER_CONTROL) {
 798                 dev_err(dev, "1st PIPE is not DCP\n");
 799                 return -EINVAL;
 800         }
 801
 802         info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
 803         if (!info->pipe) {
 804                 dev_err(dev, "Could not allocate pipe\n");
 805                 return -ENOMEM;
 806         }
 807
 808         info->size = pipe_size;
 809
 810         /*
 811          * init pipe
 812          */
 813         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 814                 pipe->priv = priv;
 815
 816                 usbhs_pipe_type(pipe) =
 817                         pipe_configs[i].type & USB_ENDPOINT_XFERTYPE_MASK;
 818
 819                 dev_dbg(dev, "pipe %x\t: %s\n",
 820                         i, usbhsp_pipe_name[pipe_configs[i].type]);
 821         }
 822
 823         return 0;
 824 }
 825
 826 void usbhs_pipe_remove(struct usbhs_priv *priv)
 827 {
 828         struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
 829
 830         kfree(info->pipe);
 831 }