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 /*
  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 val;
 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                 val  = usbhsp_pipectrl_get(pipe);
 260                 val &= CSSTS | PID_MASK;
 261                 if (!val)
 262                         return 0;
 263
 264                 udelay(10);
 265
 266         } while (timeout--);
 267
 268         return -EBUSY;
 269 }
 270
 271 int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe)
 272 {
 273         u16 val;
 274
 275         val = usbhsp_pipectrl_get(pipe);
 276         if (val & BSTS)
 277                 return 0;
 278
 279         return -EBUSY;
 280 }
 281
 282 /*
 283  *              PID ctrl
 284  */
 285 static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
 286 {
 287         u16 pid = usbhsp_pipectrl_get(pipe);
 288
 289         pid &= PID_MASK;
 290
 291         /*
 292          * see
 293          * "Pipe n Control Register" - "PID"
 294          */
 295         switch (pid) {
 296         case PID_STALL11:
 297                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
 298                 /* fall-through */
 299         case PID_STALL10:
 300                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
 301         }
 302 }
 303
 304 void usbhs_pipe_disable(struct usbhs_pipe *pipe)
 305 {
 306         int timeout = 1024;
 307         u16 val;
 308
 309         /* see "Pipe n Control Register" - "PID" */
 310         __usbhsp_pid_try_nak_if_stall(pipe);
 311
 312         usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
 313
 314         do {
 315                 val  = usbhsp_pipectrl_get(pipe);
 316                 val &= PBUSY;
 317                 if (!val)
 318                         break;
 319
 320                 udelay(10);
 321         } while (timeout--);
 322 }
 323
 324 void usbhs_pipe_enable(struct usbhs_pipe *pipe)
 325 {
 326         /* see "Pipe n Control Register" - "PID" */
 327         __usbhsp_pid_try_nak_if_stall(pipe);
 328
 329         usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
 330 }
 331
 332 void usbhs_pipe_stall(struct usbhs_pipe *pipe)
 333 {
 334         u16 pid = usbhsp_pipectrl_get(pipe);
 335
 336         pid &= PID_MASK;
 337
 338         /*
 339          * see
 340          * "Pipe n Control Register" - "PID"
 341          */
 342         switch (pid) {
 343         case PID_NAK:
 344                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
 345                 break;
 346         case PID_BUF:
 347                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
 348                 break;
 349         }
 350 }
 351
 352 int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
 353 {
 354         u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;
 355
 356         return (int)(pid == PID_STALL10 || pid == PID_STALL11);
 357 }
 358
 359 void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len)
 360 {
 361         if (!usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 362                 return;
 363
 364         /*
 365          * clear and disable transfer counter for IN/OUT pipe
 366          */
 367         usbhsp_pipe_tre_set(pipe, TRCLR | TRENB, TRCLR);
 368
 369         /*
 370          * Only IN direction bulk pipe can use transfer count.
 371          * Without using this function,
 372          * received data will break if it was large data size.
 373          * see PIPEnTRN/PIPEnTRE for detail
 374          */
 375         if (usbhs_pipe_is_dir_in(pipe)) {
 376                 int maxp = usbhs_pipe_get_maxpacket(pipe);
 377
 378                 usbhsp_pipe_trn_set(pipe, 0xffff, DIV_ROUND_UP(len, maxp));
 379                 usbhsp_pipe_tre_set(pipe, TRENB, TRENB); /* enable */
 380         }
 381 }
 382
 383
 384 /*
 385  *              pipe setup
 386  */
 387 static int usbhsp_possible_double_buffer(struct usbhs_pipe *pipe)
 388 {
 389         /*
 390          * only ISO / BULK pipe can use double buffer
 391          */
 392         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) ||
 393             usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
 394                 return 1;
 395
 396         return 0;
 397 }
 398
 399 static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
 400                                 int is_host,
 401                                 int dir_in)
 402 {
 403         u16 type = 0;
 404         u16 bfre = 0;
 405         u16 dblb = 0;
 406         u16 cntmd = 0;
 407         u16 dir = 0;
 408         u16 epnum = 0;
 409         u16 shtnak = 0;
 410         u16 type_array[] = {
 411                 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
 412                 [USB_ENDPOINT_XFER_INT]  = TYPE_INT,
 413                 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
 414         };
 415         int is_double = usbhsp_possible_double_buffer(pipe);
 416
 417         if (usbhs_pipe_is_dcp(pipe))
 418                 return -EINVAL;
 419
 420         /*
 421          * PIPECFG
 422          *
 423          * see
 424          *  - "Register Descriptions" - "PIPECFG" register
 425          *  - "Features"  - "Pipe configuration"
 426          *  - "Operation" - "Pipe Control"
 427          */
 428
 429         /* TYPE */
 430         type = type_array[usbhs_pipe_type(pipe)];
 431
 432         /* BFRE */
 433         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
 434             usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 435                 bfre = 0; /* FIXME */
 436
 437         /* DBLB */
 438         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
 439             usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 440                 dblb = (is_double) ? DBLB : 0;
 441
 442         /* CNTMD */
 443         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 444                 cntmd = 0; /* FIXME */
 445
 446         /* DIR */
 447         if (dir_in)
 448                 usbhsp_flags_set(pipe, IS_DIR_HOST);
 449
 450         if (!!is_host ^ !!dir_in)
 451                 dir |= DIR_OUT;
 452
 453         if (!dir)
 454                 usbhsp_flags_set(pipe, IS_DIR_IN);
 455
 456         /* SHTNAK */
 457         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
 458             !dir)
 459                 shtnak = SHTNAK;
 460
 461         /* EPNUM */
 462         epnum = 0; /* see usbhs_pipe_config_update() */
 463
 464         return  type    |
 465                 bfre    |
 466                 dblb    |
 467                 cntmd   |
 468                 dir     |
 469                 shtnak  |
 470                 epnum;
 471 }
 472
 473 static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe)
 474 {
 475         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 476         struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
 477         struct device *dev = usbhs_priv_to_dev(priv);
 478         int pipe_num = usbhs_pipe_number(pipe);
 479         int is_double = usbhsp_possible_double_buffer(pipe);
 480         u16 buff_size;
 481         u16 bufnmb;
 482         u16 bufnmb_cnt;
 483
 484         /*
 485          * PIPEBUF
 486          *
 487          * see
 488          *  - "Register Descriptions" - "PIPEBUF" register
 489          *  - "Features"  - "Pipe configuration"
 490          *  - "Operation" - "FIFO Buffer Memory"
 491          *  - "Operation" - "Pipe Control"
 492          *
 493          * ex) if pipe6 - pipe9 are USB_ENDPOINT_XFER_INT (SH7724)
 494          *
 495          * BUFNMB:      PIPE
 496          * 0:           pipe0 (DCP 256byte)
 497          * 1:           -
 498          * 2:           -
 499          * 3:           -
 500          * 4:           pipe6 (INT 64byte)
 501          * 5:           pipe7 (INT 64byte)
 502          * 6:           pipe8 (INT 64byte)
 503          * 7:           pipe9 (INT 64byte)
 504          * 8 - xx:      free (for BULK, ISOC)
 505          */
 506
 507         /*
 508          * FIXME
 509          *
 510          * it doesn't have good buffer allocator
 511          *
 512          * DCP : 256 byte
 513          * BULK: 512 byte
 514          * INT :  64 byte
 515          * ISOC: 512 byte
 516          */
 517         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_CONTROL))
 518                 buff_size = 256;
 519         else if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))
 520                 buff_size = 64;
 521         else
 522                 buff_size = 512;
 523
 524         /* change buff_size to register value */
 525         bufnmb_cnt = (buff_size / 64) - 1;
 526
 527         /* BUFNMB has been reserved for INT pipe
 528          * see above */
 529         if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT)) {
 530                 bufnmb = pipe_num - 2;
 531         } else {
 532                 bufnmb = info->bufnmb_last;
 533                 info->bufnmb_last += bufnmb_cnt + 1;
 534
 535                 /*
 536                  * double buffer
 537                  */
 538                 if (is_double)
 539                         info->bufnmb_last += bufnmb_cnt + 1;
 540         }
 541
 542         dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
 543                 pipe_num, buff_size, bufnmb);
 544
 545         return  (0x1f & bufnmb_cnt)     << 10 |
 546                 (0xff & bufnmb)         <<  0;
 547 }
 548
 549 void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
 550                               u16 epnum, u16 maxp)
 551 {
 552         if (devsel > 0xA) {
 553                 struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 554                 struct device *dev = usbhs_priv_to_dev(priv);
 555
 556                 dev_err(dev, "devsel error %d\n", devsel);
 557
 558                 devsel = 0;
 559         }
 560
 561         usbhsp_pipe_barrier(pipe);
 562
 563         pipe->maxp = maxp;
 564
 565         usbhsp_pipe_select(pipe);
 566         usbhsp_pipe_maxp_set(pipe, 0xFFFF,
 567                              (devsel << 12) |
 568                              maxp);
 569
 570         if (!usbhs_pipe_is_dcp(pipe))
 571                 usbhsp_pipe_cfg_set(pipe,  0x000F, epnum);
 572 }
 573
 574 /*
 575  *              pipe control
 576  */
 577 int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
 578 {
 579         /*
 580          * see
 581          *      usbhs_pipe_config_update()
 582          *      usbhs_dcp_malloc()
 583          */
 584         return pipe->maxp;
 585 }
 586
 587 int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
 588 {
 589         return usbhsp_flags_has(pipe, IS_DIR_IN);
 590 }
 591
 592 int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
 593 {
 594         return usbhsp_flags_has(pipe, IS_DIR_HOST);
 595 }
 596
 597 int usbhs_pipe_is_running(struct usbhs_pipe *pipe)
 598 {
 599         return usbhsp_flags_has(pipe, IS_RUNNING);
 600 }
 601
 602 void usbhs_pipe_running(struct usbhs_pipe *pipe, int running)
 603 {
 604         if (running)
 605                 usbhsp_flags_set(pipe, IS_RUNNING);
 606         else
 607                 usbhsp_flags_clr(pipe, IS_RUNNING);
 608 }
 609
 610 void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
 611 {
 612         u16 mask = (SQCLR | SQSET);
 613         u16 val;
 614
 615         /*
 616          * sequence
 617          *  0  : data0
 618          *  1  : data1
 619          *  -1 : no change
 620          */
 621         switch (sequence) {
 622         case 0:
 623                 val = SQCLR;
 624                 break;
 625         case 1:
 626                 val = SQSET;
 627                 break;
 628         default:
 629                 return;
 630         }
 631
 632         usbhsp_pipectrl_set(pipe, mask, val);
 633 }
 634
 635 static int usbhs_pipe_get_data_sequence(struct usbhs_pipe *pipe)
 636 {
 637         return !!(usbhsp_pipectrl_get(pipe) & SQMON);
 638 }
 639
 640 void usbhs_pipe_clear(struct usbhs_pipe *pipe)
 641 {
 642         if (usbhs_pipe_is_dcp(pipe)) {
 643                 usbhs_fifo_clear_dcp(pipe);
 644         } else {
 645                 usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
 646                 usbhsp_pipectrl_set(pipe, ACLRM, 0);
 647         }
 648 }
 649
 650 void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
 651 {
 652         int sequence;
 653
 654         if (usbhs_pipe_is_dcp(pipe))
 655                 return;
 656
 657         usbhsp_pipe_select(pipe);
 658         /* check if the driver needs to change the BFRE value */
 659         if (!(enable ^ !!(usbhsp_pipe_cfg_get(pipe) & BFRE)))
 660                 return;
 661
 662         sequence = usbhs_pipe_get_data_sequence(pipe);
 663         usbhsp_pipe_cfg_set(pipe, BFRE, enable ? BFRE : 0);
 664         usbhs_pipe_clear(pipe);
 665         usbhs_pipe_data_sequence(pipe, sequence);
 666 }
 667
 668 static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
 669 {
 670         struct usbhs_pipe *pos, *pipe;
 671         int i;
 672
 673         /*
 674          * find target pipe
 675          */
 676         pipe = NULL;
 677         usbhs_for_each_pipe_with_dcp(pos, priv, i) {
 678                 if (!usbhs_pipe_type_is(pos, type))
 679                         continue;
 680                 if (usbhsp_flags_has(pos, IS_USED))
 681                         continue;
 682
 683                 pipe = pos;
 684                 break;
 685         }
 686
 687         if (!pipe)
 688                 return NULL;
 689
 690         /*
 691          * initialize pipe flags
 692          */
 693         usbhsp_flags_init(pipe);
 694         usbhsp_flags_set(pipe, IS_USED);
 695
 696         return pipe;
 697 }
 698
 699 static void usbhsp_put_pipe(struct usbhs_pipe *pipe)
 700 {
 701         usbhsp_flags_init(pipe);
 702 }
 703
 704 void usbhs_pipe_init(struct usbhs_priv *priv,
 705                      int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map))
 706 {
 707         struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
 708         struct usbhs_pipe *pipe;
 709         int i;
 710
 711         /*
 712          * FIXME
 713          *
 714          * driver needs good allocator.
 715          *
 716          * find first free buffer area (BULK, ISOC)
 717          * (DCP, INT area is fixed)
 718          *
 719          * buffer number 0 - 3 have been reserved for DCP
 720          * see
 721          *      usbhsp_to_bufnmb
 722          */
 723         info->bufnmb_last = 4;
 724         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 725                 if (usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_INT))
 726                         info->bufnmb_last++;
 727
 728                 usbhsp_flags_init(pipe);
 729                 pipe->fifo = NULL;
 730                 pipe->mod_private = NULL;
 731                 INIT_LIST_HEAD(&pipe->list);
 732
 733                 /* pipe force init */
 734                 usbhs_pipe_clear(pipe);
 735         }
 736
 737         info->dma_map_ctrl = dma_map_ctrl;
 738 }
 739
 740 struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
 741                                      int endpoint_type,
 742                                      int dir_in)
 743 {
 744         struct device *dev = usbhs_priv_to_dev(priv);
 745         struct usbhs_pipe *pipe;
 746         int is_host = usbhs_mod_is_host(priv);
 747         int ret;
 748         u16 pipecfg, pipebuf;
 749
 750         pipe = usbhsp_get_pipe(priv, endpoint_type);
 751         if (!pipe) {
 752                 dev_err(dev, "can't get pipe (%s)\n",
 753                         usbhsp_pipe_name[endpoint_type]);
 754                 return NULL;
 755         }
 756
 757         INIT_LIST_HEAD(&pipe->list);
 758
 759         usbhs_pipe_disable(pipe);
 760
 761         /* make sure pipe is not busy */
 762         ret = usbhsp_pipe_barrier(pipe);
 763         if (ret < 0) {
 764                 dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
 765                 return NULL;
 766         }
 767
 768         pipecfg  = usbhsp_setup_pipecfg(pipe, is_host, dir_in);
 769         pipebuf  = usbhsp_setup_pipebuff(pipe);
 770
 771         usbhsp_pipe_select(pipe);
 772         usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
 773         usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
 774         usbhs_pipe_clear(pipe);
 775
 776         usbhs_pipe_sequence_data0(pipe);
 777
 778         dev_dbg(dev, "enable pipe %d : %s (%s)\n",
 779                 usbhs_pipe_number(pipe),
 780                 usbhs_pipe_name(pipe),
 781                 usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
 782
 783         /*
 784          * epnum / maxp are still not set to this pipe.
 785          * call usbhs_pipe_config_update() after this function !!
 786          */
 787
 788         return pipe;
 789 }
 790
 791 void usbhs_pipe_free(struct usbhs_pipe *pipe)
 792 {
 793         usbhsp_put_pipe(pipe);
 794 }
 795
 796 void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
 797 {
 798         if (pipe->fifo)
 799                 pipe->fifo->pipe = NULL;
 800
 801         pipe->fifo = fifo;
 802
 803         if (fifo)
 804                 fifo->pipe = pipe;
 805 }
 806
 807
 808 /*
 809  *              dcp control
 810  */
 811 struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
 812 {
 813         struct usbhs_pipe *pipe;
 814
 815         pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
 816         if (!pipe)
 817                 return NULL;
 818
 819         INIT_LIST_HEAD(&pipe->list);
 820
 821         /*
 822          * call usbhs_pipe_config_update() after this function !!
 823          */
 824
 825         return pipe;
 826 }
 827
 828 void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
 829 {
 830         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
 831
 832         WARN_ON(!usbhs_pipe_is_dcp(pipe));
 833
 834         usbhs_pipe_enable(pipe);
 835
 836         if (!usbhs_mod_is_host(priv)) /* funconly */
 837                 usbhsp_pipectrl_set(pipe, CCPL, CCPL);
 838 }
 839
 840 void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out)
 841 {
 842         usbhsp_pipe_cfg_set(pipe, DIR_OUT,
 843                             dir_out ? DIR_OUT : 0);
 844 }
 845
 846 /*
 847  *              pipe module function
 848  */
 849 int usbhs_pipe_probe(struct usbhs_priv *priv)
 850 {
 851         struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
 852         struct usbhs_pipe *pipe;
 853         struct device *dev = usbhs_priv_to_dev(priv);
 854         u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
 855         int pipe_size = usbhs_get_dparam(priv, pipe_size);
 856         int i;
 857
 858         /* This driver expects 1st pipe is DCP */
 859         if (pipe_type[0] != USB_ENDPOINT_XFER_CONTROL) {
 860                 dev_err(dev, "1st PIPE is not DCP\n");
 861                 return -EINVAL;
 862         }
 863
 864         info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
 865         if (!info->pipe) {
 866                 dev_err(dev, "Could not allocate pipe\n");
 867                 return -ENOMEM;
 868         }
 869
 870         info->size = pipe_size;
 871
 872         /*
 873          * init pipe
 874          */
 875         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 876                 pipe->priv = priv;
 877
 878                 usbhs_pipe_type(pipe) =
 879                         pipe_type[i] & USB_ENDPOINT_XFERTYPE_MASK;
 880
 881                 dev_dbg(dev, "pipe %x\t: %s\n",
 882                         i, usbhsp_pipe_name[pipe_type[i]]);
 883         }
 884
 885         return 0;
 886 }
 887
 888 void usbhs_pipe_remove(struct usbhs_priv *priv)
 889 {
 890         struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv);
 891
 892         kfree(info->pipe);
 893 }