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/io.h>
  19 #include <linux/slab.h>
  20 #include "./common.h"
  21 #include "./pipe.h"
  22
  23 /*
  24  *              macros
  25  */
  26 #define usbhsp_priv_to_pipeinfo(pr)     (&(pr)->pipe_info)
  27 #define usbhsp_pipe_to_priv(p)          ((p)->priv)
  28
  29 #define usbhsp_addr_offset(p)   ((usbhs_pipe_number(p) - 1) * 2)
  30
  31 #define usbhsp_is_dcp(p)        ((p)->priv->pipe_info.pipe == (p))
  32
  33 #define usbhsp_flags_set(p, f)  ((p)->flags |=  USBHS_PIPE_FLAGS_##f)
  34 #define usbhsp_flags_clr(p, f)  ((p)->flags &= ~USBHS_PIPE_FLAGS_##f)
  35 #define usbhsp_flags_has(p, f)  ((p)->flags &   USBHS_PIPE_FLAGS_##f)
  36 #define usbhsp_flags_init(p)    do {(p)->flags = 0; } while (0)
  37
  38 #define usbhsp_type(p)          ((p)->pipe_type)
  39 #define usbhsp_type_is(p, t)    ((p)->pipe_type == t)
  40
  41 /*
  42  * for debug
  43  */
  44 static char *usbhsp_pipe_name[] = {
  45         [USB_ENDPOINT_XFER_CONTROL]     = "DCP",
  46         [USB_ENDPOINT_XFER_BULK]        = "BULK",
  47         [USB_ENDPOINT_XFER_INT]         = "INT",
  48         [USB_ENDPOINT_XFER_ISOC]        = "ISO",
  49 };
  50
  51 /*
  52  *              usb request functions
  53  */
  54 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
  55 {
  56         u16 val;
  57
  58         val = usbhs_read(priv, USBREQ);
  59         req->bRequest           = (val >> 8) & 0xFF;
  60         req->bRequestType       = (val >> 0) & 0xFF;
  61
  62         req->wValue     = usbhs_read(priv, USBVAL);
  63         req->wIndex     = usbhs_read(priv, USBINDX);
  64         req->wLength    = usbhs_read(priv, USBLENG);
  65 }
  66
  67 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
  68 {
  69         usbhs_write(priv, USBREQ,  (req->bRequest << 8) | req->bRequestType);
  70         usbhs_write(priv, USBVAL,  req->wValue);
  71         usbhs_write(priv, USBINDX, req->wIndex);
  72         usbhs_write(priv, USBLENG, req->wLength);
  73 }
  74
  75 /*
  76  *              DCPCTR/PIPEnCTR functions
  77  */
  78 static void usbhsp_pipectrl_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
  79 {
  80         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
  81         int offset = usbhsp_addr_offset(pipe);
  82
  83         if (usbhsp_is_dcp(pipe))
  84                 usbhs_bset(priv, DCPCTR, mask, val);
  85         else
  86                 usbhs_bset(priv, PIPEnCTR + offset, mask, val);
  87 }
  88
  89 static u16 usbhsp_pipectrl_get(struct usbhs_pipe *pipe)
  90 {
  91         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
  92         int offset = usbhsp_addr_offset(pipe);
  93
  94         if (usbhsp_is_dcp(pipe))
  95                 return usbhs_read(priv, DCPCTR);
  96         else
  97                 return usbhs_read(priv, PIPEnCTR + offset);
  98 }
  99
 100 /*
 101  *              DCP/PIPE functions
 102  */
 103 static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
 104                                   u16 dcp_reg, u16 pipe_reg,
 105                                   u16 mask, u16 val)
 106 {
 107         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 108
 109         if (usbhsp_is_dcp(pipe))
 110                 usbhs_bset(priv, dcp_reg, mask, val);
 111         else
 112                 usbhs_bset(priv, pipe_reg, mask, val);
 113 }
 114
 115 static u16 __usbhsp_pipe_xxx_get(struct usbhs_pipe *pipe,
 116                                  u16 dcp_reg, u16 pipe_reg)
 117 {
 118         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 119
 120         if (usbhsp_is_dcp(pipe))
 121                 return usbhs_read(priv, dcp_reg);
 122         else
 123                 return usbhs_read(priv, pipe_reg);
 124 }
 125
 126 /*
 127  *              DCPCFG/PIPECFG functions
 128  */
 129 static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 130 {
 131         __usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
 132 }
 133
 134 /*
 135  *              PIPEBUF
 136  */
 137 static void usbhsp_pipe_buf_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 138 {
 139         if (usbhsp_is_dcp(pipe))
 140                 return;
 141
 142         __usbhsp_pipe_xxx_set(pipe, 0, PIPEBUF, mask, val);
 143 }
 144
 145 /*
 146  *              DCPMAXP/PIPEMAXP
 147  */
 148 static void usbhsp_pipe_maxp_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
 149 {
 150         __usbhsp_pipe_xxx_set(pipe, DCPMAXP, PIPEMAXP, mask, val);
 151 }
 152
 153 static u16 usbhsp_pipe_maxp_get(struct usbhs_pipe *pipe)
 154 {
 155         return __usbhsp_pipe_xxx_get(pipe, DCPMAXP, PIPEMAXP);
 156 }
 157
 158 /*
 159  *              pipe control functions
 160  */
 161 static void usbhsp_pipe_select(struct usbhs_pipe *pipe)
 162 {
 163         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 164
 165         /*
 166          * On pipe, this is necessary before
 167          * accesses to below registers.
 168          *
 169          * PIPESEL      : usbhsp_pipe_select
 170          * PIPECFG      : usbhsp_pipe_cfg_xxx
 171          * PIPEBUF      : usbhsp_pipe_buf_xxx
 172          * PIPEMAXP     : usbhsp_pipe_maxp_xxx
 173          * PIPEPERI
 174          */
 175
 176         /*
 177          * if pipe is dcp, no pipe is selected.
 178          * it is no problem, because dcp have its register
 179          */
 180         usbhs_write(priv, PIPESEL, 0xF & usbhs_pipe_number(pipe));
 181 }
 182
 183 static int usbhsp_pipe_barrier(struct usbhs_pipe *pipe)
 184 {
 185         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 186         int timeout = 1024;
 187         u16 val;
 188
 189         /*
 190          * make sure....
 191          *
 192          * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
 193          * specified by the CURPIPE bits.
 194          * When changing the setting of this bit after changing
 195          * the PID bits for the selected pipe from BUF to NAK,
 196          * check that CSSTS = 0 and PBUSY = 0.
 197          */
 198
 199         /*
 200          * CURPIPE bit = 0
 201          *
 202          * see also
 203          *  "Operation"
 204          *  - "Pipe Control"
 205          *   - "Pipe Control Registers Switching Procedure"
 206          */
 207         usbhs_write(priv, CFIFOSEL, 0);
 208         usbhs_fifo_disable(pipe);
 209
 210         do {
 211                 val  = usbhsp_pipectrl_get(pipe);
 212                 val &= CSSTS | PID_MASK;
 213                 if (!val)
 214                         return 0;
 215
 216                 udelay(10);
 217
 218         } while (timeout--);
 219
 220         return -EBUSY;
 221 }
 222
 223 static int usbhsp_pipe_is_accessible(struct usbhs_pipe *pipe)
 224 {
 225         u16 val;
 226
 227         val = usbhsp_pipectrl_get(pipe);
 228         if (val & BSTS)
 229                 return 0;
 230
 231         return -EBUSY;
 232 }
 233
 234 /*
 235  *              PID ctrl
 236  */
 237 static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
 238 {
 239         u16 pid = usbhsp_pipectrl_get(pipe);
 240
 241         pid &= PID_MASK;
 242
 243         /*
 244          * see
 245          * "Pipe n Control Register" - "PID"
 246          */
 247         switch (pid) {
 248         case PID_STALL11:
 249                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
 250                 /* fall-through */
 251         case PID_STALL10:
 252                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
 253         }
 254 }
 255
 256 void usbhs_fifo_disable(struct usbhs_pipe *pipe)
 257 {
 258         int timeout = 1024;
 259         u16 val;
 260
 261         /* see "Pipe n Control Register" - "PID" */
 262         __usbhsp_pid_try_nak_if_stall(pipe);
 263
 264         usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
 265
 266         do {
 267                 val  = usbhsp_pipectrl_get(pipe);
 268                 val &= PBUSY;
 269                 if (!val)
 270                         break;
 271
 272                 udelay(10);
 273         } while (timeout--);
 274 }
 275
 276 void usbhs_fifo_enable(struct usbhs_pipe *pipe)
 277 {
 278         /* see "Pipe n Control Register" - "PID" */
 279         __usbhsp_pid_try_nak_if_stall(pipe);
 280
 281         usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
 282 }
 283
 284 void usbhs_fifo_stall(struct usbhs_pipe *pipe)
 285 {
 286         u16 pid = usbhsp_pipectrl_get(pipe);
 287
 288         pid &= PID_MASK;
 289
 290         /*
 291          * see
 292          * "Pipe n Control Register" - "PID"
 293          */
 294         switch (pid) {
 295         case PID_NAK:
 296                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
 297                 break;
 298         case PID_BUF:
 299                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
 300                 break;
 301         }
 302 }
 303
 304 /*
 305  *              CFIFO ctrl
 306  */
 307 void usbhs_fifo_send_terminator(struct usbhs_pipe *pipe)
 308 {
 309         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 310
 311         usbhs_bset(priv, CFIFOCTR, BVAL, BVAL);
 312 }
 313
 314 static void usbhsp_fifo_clear(struct usbhs_pipe *pipe)
 315 {
 316         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 317
 318         usbhs_write(priv, CFIFOCTR, BCLR);
 319 }
 320
 321 static int usbhsp_fifo_barrier(struct usbhs_priv *priv)
 322 {
 323         int timeout = 1024;
 324
 325         do {
 326                 /* The FIFO port is accessible */
 327                 if (usbhs_read(priv, CFIFOCTR) & FRDY)
 328                         return 0;
 329
 330                 udelay(10);
 331         } while (timeout--);
 332
 333         return -EBUSY;
 334 }
 335
 336 static int usbhsp_fifo_rcv_len(struct usbhs_priv *priv)
 337 {
 338         return usbhs_read(priv, CFIFOCTR) & DTLN_MASK;
 339 }
 340
 341 static int usbhsp_fifo_select(struct usbhs_pipe *pipe, int write)
 342 {
 343         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 344         struct device *dev = usbhs_priv_to_dev(priv);
 345         int timeout = 1024;
 346         u16 mask = ((1 << 5) | 0xF);            /* mask of ISEL | CURPIPE */
 347         u16 base = usbhs_pipe_number(pipe);     /* CURPIPE */
 348
 349         if (usbhsp_is_dcp(pipe))
 350                 base |= (1 == write) << 5;      /* ISEL */
 351
 352         /* "base" will be used below  */
 353         usbhs_write(priv, CFIFOSEL, base | MBW_32);
 354
 355         /* check ISEL and CURPIPE value */
 356         while (timeout--) {
 357                 if (base == (mask & usbhs_read(priv, CFIFOSEL)))
 358                         return 0;
 359                 udelay(10);
 360         }
 361
 362         dev_err(dev, "fifo select error\n");
 363
 364         return -EIO;
 365 }
 366
 367 int usbhs_fifo_prepare_write(struct usbhs_pipe *pipe)
 368 {
 369         return usbhsp_fifo_select(pipe, 1);
 370 }
 371
 372 int usbhs_fifo_write(struct usbhs_pipe *pipe, u8 *buf, int len)
 373 {
 374         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 375         void __iomem *addr = priv->base + CFIFO;
 376         int maxp = usbhs_pipe_get_maxpacket(pipe);
 377         int total_len;
 378         int i, ret;
 379
 380         ret = usbhsp_pipe_is_accessible(pipe);
 381         if (ret < 0)
 382                 return ret;
 383
 384         ret = usbhsp_fifo_select(pipe, 1);
 385         if (ret < 0)
 386                 return ret;
 387
 388         ret = usbhsp_fifo_barrier(priv);
 389         if (ret < 0)
 390                 return ret;
 391
 392         len = min(len, maxp);
 393         total_len = len;
 394
 395         /*
 396          * FIXME
 397          *
 398          * 32-bit access only
 399          */
 400         if (len >= 4 &&
 401             !((unsigned long)buf & 0x03)) {
 402                 iowrite32_rep(addr, buf, len / 4);
 403                 len %= 4;
 404                 buf += total_len - len;
 405         }
 406
 407         /* the rest operation */
 408         for (i = 0; i < len; i++)
 409                 iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
 410
 411         if (total_len < maxp)
 412                 usbhs_fifo_send_terminator(pipe);
 413
 414         return total_len;
 415 }
 416
 417 int usbhs_fifo_prepare_read(struct usbhs_pipe *pipe)
 418 {
 419         int ret;
 420
 421         /*
 422          * select pipe and enable it to prepare packet receive
 423          */
 424         ret = usbhsp_fifo_select(pipe, 0);
 425         if (ret < 0)
 426                 return ret;
 427
 428         usbhs_fifo_enable(pipe);
 429
 430         return ret;
 431 }
 432
 433 int usbhs_fifo_read(struct usbhs_pipe *pipe, u8 *buf, int len)
 434 {
 435         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 436         void __iomem *addr = priv->base + CFIFO;
 437         int rcv_len;
 438         int i, ret;
 439         int total_len;
 440         u32 data = 0;
 441
 442         ret = usbhsp_fifo_select(pipe, 0);
 443         if (ret < 0)
 444                 return ret;
 445
 446         ret = usbhsp_fifo_barrier(priv);
 447         if (ret < 0)
 448                 return ret;
 449
 450         rcv_len = usbhsp_fifo_rcv_len(priv);
 451
 452         /*
 453          * Buffer clear if Zero-Length packet
 454          *
 455          * see
 456          * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
 457          */
 458         if (0 == rcv_len) {
 459                 usbhsp_fifo_clear(pipe);
 460                 return 0;
 461         }
 462
 463         len = min(rcv_len, len);
 464         total_len = len;
 465
 466         /*
 467          * FIXME
 468          *
 469          * 32-bit access only
 470          */
 471         if (len >= 4 &&
 472             !((unsigned long)buf & 0x03)) {
 473                 ioread32_rep(addr, buf, len / 4);
 474                 len %= 4;
 475                 buf += rcv_len - len;
 476         }
 477
 478         /* the rest operation */
 479         for (i = 0; i < len; i++) {
 480                 if (!(i & 0x03))
 481                         data = ioread32(addr);
 482
 483                 buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
 484         }
 485
 486         return total_len;
 487 }
 488
 489 /*
 490  *              pipe setup
 491  */
 492 static int usbhsp_possible_double_buffer(struct usbhs_pipe *pipe)
 493 {
 494         /*
 495          * only ISO / BULK pipe can use double buffer
 496          */
 497         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK) ||
 498             usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
 499                 return 1;
 500
 501         return 0;
 502 }
 503
 504 static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
 505                                 const struct usb_endpoint_descriptor *desc,
 506                                 int is_host)
 507 {
 508         u16 type = 0;
 509         u16 bfre = 0;
 510         u16 dblb = 0;
 511         u16 cntmd = 0;
 512         u16 dir = 0;
 513         u16 epnum = 0;
 514         u16 shtnak = 0;
 515         u16 type_array[] = {
 516                 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
 517                 [USB_ENDPOINT_XFER_INT]  = TYPE_INT,
 518                 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
 519         };
 520         int is_double = usbhsp_possible_double_buffer(pipe);
 521
 522         if (usbhsp_is_dcp(pipe))
 523                 return -EINVAL;
 524
 525         /*
 526          * PIPECFG
 527          *
 528          * see
 529          *  - "Register Descriptions" - "PIPECFG" register
 530          *  - "Features"  - "Pipe configuration"
 531          *  - "Operation" - "Pipe Control"
 532          */
 533
 534         /* TYPE */
 535         type = type_array[usbhsp_type(pipe)];
 536
 537         /* BFRE */
 538         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
 539             usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 540                 bfre = 0; /* FIXME */
 541
 542         /* DBLB */
 543         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
 544             usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 545                 dblb = (is_double) ? DBLB : 0;
 546
 547         /* CNTMD */
 548         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 549                 cntmd = 0; /* FIXME */
 550
 551         /* DIR */
 552         if (usb_endpoint_dir_in(desc))
 553                 usbhsp_flags_set(pipe, IS_DIR_IN);
 554
 555         if ((is_host  && usb_endpoint_dir_out(desc)) ||
 556             (!is_host && usb_endpoint_dir_in(desc)))
 557                 dir |= DIR_OUT;
 558
 559         /* SHTNAK */
 560         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
 561             !dir)
 562                 shtnak = SHTNAK;
 563
 564         /* EPNUM */
 565         epnum = 0xF & usb_endpoint_num(desc);
 566
 567         return  type    |
 568                 bfre    |
 569                 dblb    |
 570                 cntmd   |
 571                 dir     |
 572                 shtnak  |
 573                 epnum;
 574 }
 575
 576 static u16 usbhsp_setup_pipemaxp(struct usbhs_pipe *pipe,
 577                                  const struct usb_endpoint_descriptor *desc,
 578                                  int is_host)
 579 {
 580         /* host should set DEVSEL */
 581
 582         /* reutn MXPS */
 583         return PIPE_MAXP_MASK & le16_to_cpu(desc->wMaxPacketSize);
 584 }
 585
 586 static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe,
 587                                  const struct usb_endpoint_descriptor *desc,
 588                                  int is_host)
 589 {
 590         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 591         struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
 592         struct device *dev = usbhs_priv_to_dev(priv);
 593         int pipe_num = usbhs_pipe_number(pipe);
 594         int is_double = usbhsp_possible_double_buffer(pipe);
 595         u16 buff_size;
 596         u16 bufnmb;
 597         u16 bufnmb_cnt;
 598
 599         /*
 600          * PIPEBUF
 601          *
 602          * see
 603          *  - "Register Descriptions" - "PIPEBUF" register
 604          *  - "Features"  - "Pipe configuration"
 605          *  - "Operation" - "FIFO Buffer Memory"
 606          *  - "Operation" - "Pipe Control"
 607          *
 608          * ex) if pipe6 - pipe9 are USB_ENDPOINT_XFER_INT (SH7724)
 609          *
 610          * BUFNMB:      PIPE
 611          * 0:           pipe0 (DCP 256byte)
 612          * 1:           -
 613          * 2:           -
 614          * 3:           -
 615          * 4:           pipe6 (INT 64byte)
 616          * 5:           pipe7 (INT 64byte)
 617          * 6:           pipe8 (INT 64byte)
 618          * 7:           pipe9 (INT 64byte)
 619          * 8 - xx:      free (for BULK, ISOC)
 620          */
 621
 622         /*
 623          * FIXME
 624          *
 625          * it doesn't have good buffer allocator
 626          *
 627          * DCP : 256 byte
 628          * BULK: 512 byte
 629          * INT :  64 byte
 630          * ISOC: 512 byte
 631          */
 632         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_CONTROL))
 633                 buff_size = 256;
 634         else if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT))
 635                 buff_size = 64;
 636         else
 637                 buff_size = 512;
 638
 639         /* change buff_size to register value */
 640         bufnmb_cnt = (buff_size / 64) - 1;
 641
 642         /* BUFNMB has been reserved for INT pipe
 643          * see above */
 644         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT)) {
 645                 bufnmb = pipe_num - 2;
 646         } else {
 647                 bufnmb = info->bufnmb_last;
 648                 info->bufnmb_last += bufnmb_cnt + 1;
 649
 650                 /*
 651                  * double buffer
 652                  */
 653                 if (is_double)
 654                         info->bufnmb_last += bufnmb_cnt + 1;
 655         }
 656
 657         dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
 658                 pipe_num, buff_size, bufnmb);
 659
 660         return  (0x1f & bufnmb_cnt)     << 10 |
 661                 (0xff & bufnmb)         <<  0;
 662 }
 663
 664 /*
 665  *              pipe control
 666  */
 667 int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
 668 {
 669         u16 mask = usbhsp_is_dcp(pipe) ? DCP_MAXP_MASK : PIPE_MAXP_MASK;
 670
 671         usbhsp_pipe_select(pipe);
 672
 673         return (int)(usbhsp_pipe_maxp_get(pipe) & mask);
 674 }
 675
 676 int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
 677 {
 678         return usbhsp_flags_has(pipe, IS_DIR_IN);
 679 }
 680
 681 void usbhs_pipe_clear_sequence(struct usbhs_pipe *pipe)
 682 {
 683         usbhsp_pipectrl_set(pipe, SQCLR, SQCLR);
 684 }
 685
 686 static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
 687 {
 688         struct usbhs_pipe *pos, *pipe;
 689         int i;
 690
 691         /*
 692          * find target pipe
 693          */
 694         pipe = NULL;
 695         usbhs_for_each_pipe_with_dcp(pos, priv, i) {
 696                 if (!usbhsp_type_is(pos, type))
 697                         continue;
 698                 if (usbhsp_flags_has(pos, IS_USED))
 699                         continue;
 700
 701                 pipe = pos;
 702                 break;
 703         }
 704
 705         if (!pipe)
 706                 return NULL;
 707
 708         /*
 709          * initialize pipe flags
 710          */
 711         usbhsp_flags_init(pipe);
 712         usbhsp_flags_set(pipe, IS_USED);
 713
 714         return pipe;
 715 }
 716
 717 void usbhs_pipe_init(struct usbhs_priv *priv)
 718 {
 719         struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
 720         struct usbhs_pipe *pipe;
 721         int i;
 722
 723         /*
 724          * FIXME
 725          *
 726          * driver needs good allocator.
 727          *
 728          * find first free buffer area (BULK, ISOC)
 729          * (DCP, INT area is fixed)
 730          *
 731          * buffer number 0 - 3 have been reserved for DCP
 732          * see
 733          *      usbhsp_to_bufnmb
 734          */
 735         info->bufnmb_last = 4;
 736         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 737                 if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT))
 738                         info->bufnmb_last++;
 739
 740                 usbhsp_flags_init(pipe);
 741                 pipe->mod_private = NULL;
 742
 743                 usbhsp_fifo_clear(pipe);
 744         }
 745 }
 746
 747 struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
 748                                      const struct usb_endpoint_descriptor *desc)
 749 {
 750         struct device *dev = usbhs_priv_to_dev(priv);
 751         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 752         struct usbhs_pipe *pipe;
 753         int is_host = usbhs_mod_is_host(priv, mod);
 754         int ret;
 755         u16 pipecfg, pipebuf, pipemaxp;
 756
 757         pipe = usbhsp_get_pipe(priv, usb_endpoint_type(desc));
 758         if (!pipe) {
 759                 dev_err(dev, "can't get pipe (%s)\n",
 760                         usbhsp_pipe_name[usb_endpoint_type(desc)]);
 761                 return NULL;
 762         }
 763
 764         usbhs_fifo_disable(pipe);
 765
 766         /* make sure pipe is not busy */
 767         ret = usbhsp_pipe_barrier(pipe);
 768         if (ret < 0) {
 769                 dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
 770                 return NULL;
 771         }
 772
 773         pipecfg  = usbhsp_setup_pipecfg(pipe,  desc, is_host);
 774         pipebuf  = usbhsp_setup_pipebuff(pipe, desc, is_host);
 775         pipemaxp = usbhsp_setup_pipemaxp(pipe, desc, is_host);
 776
 777         /* buffer clear
 778          * see PIPECFG :: BFRE */
 779         usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
 780         usbhsp_pipectrl_set(pipe, ACLRM, 0);
 781
 782         usbhsp_pipe_select(pipe);
 783         usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
 784         usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
 785         usbhsp_pipe_maxp_set(pipe, 0xFFFF, pipemaxp);
 786
 787         usbhs_pipe_clear_sequence(pipe);
 788
 789         dev_dbg(dev, "enable pipe %d : %s (%s)\n",
 790                 usbhs_pipe_number(pipe),
 791                 usbhsp_pipe_name[usb_endpoint_type(desc)],
 792                 usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
 793
 794         return pipe;
 795 }
 796
 797 /*
 798  *              dcp control
 799  */
 800 struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
 801 {
 802         struct usbhs_pipe *pipe;
 803
 804         pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
 805         if (!pipe)
 806                 return NULL;
 807
 808         /*
 809          * dcpcfg  : default
 810          * dcpmaxp : default
 811          * pipebuf : nothing to do
 812          */
 813
 814         usbhsp_pipe_select(pipe);
 815         usbhs_pipe_clear_sequence(pipe);
 816
 817         return pipe;
 818 }
 819
 820 void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
 821 {
 822         WARN_ON(!usbhsp_is_dcp(pipe));
 823
 824         usbhs_fifo_enable(pipe);
 825         usbhsp_pipectrl_set(pipe, CCPL, CCPL);
 826 }
 827
 828
 829 /*
 830  *              pipe module function
 831  */
 832 int usbhs_pipe_probe(struct usbhs_priv *priv)
 833 {
 834         struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
 835         struct usbhs_pipe *pipe;
 836         struct device *dev = usbhs_priv_to_dev(priv);
 837         u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
 838         int pipe_size = usbhs_get_dparam(priv, pipe_size);
 839         int i;
 840
 841         /* This driver expects 1st pipe is DCP */
 842         if (pipe_type[0] != USB_ENDPOINT_XFER_CONTROL) {
 843                 dev_err(dev, "1st PIPE is not DCP\n");
 844                 return -EINVAL;
 845         }
 846
 847         info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
 848         if (!info->pipe) {
 849                 dev_err(dev, "Could not allocate pipe\n");
 850                 return -ENOMEM;
 851         }
 852
 853         info->size = pipe_size;
 854
 855         /*
 856          * init pipe
 857          */
 858         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 859                 pipe->priv = priv;
 860                 usbhsp_type(pipe) = pipe_type[i] & USB_ENDPOINT_XFERTYPE_MASK;
 861
 862                 dev_dbg(dev, "pipe %x\t: %s\n",
 863                         i, usbhsp_pipe_name[pipe_type[i]]);
 864         }
 865
 866         return 0;
 867 }
 868
 869 void usbhs_pipe_remove(struct usbhs_priv *priv)
 870 {
 871         struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
 872
 873         kfree(info->pipe);
 874 }