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         struct device *dev = usbhs_priv_to_dev(priv);
 187         int timeout = 1024;
 188         u16 val;
 189
 190         /*
 191          * make sure....
 192          *
 193          * Modify these bits when CSSTS = 0, PID = NAK, and no pipe number is
 194          * specified by the CURPIPE bits.
 195          * When changing the setting of this bit after changing
 196          * the PID bits for the selected pipe from BUF to NAK,
 197          * check that CSSTS = 0 and PBUSY = 0.
 198          */
 199
 200         /*
 201          * CURPIPE bit = 0
 202          *
 203          * see also
 204          *  "Operation"
 205          *  - "Pipe Control"
 206          *   - "Pipe Control Registers Switching Procedure"
 207          */
 208         usbhs_write(priv, CFIFOSEL, 0);
 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         /*
 221          * force NAK
 222          */
 223         timeout = 1024;
 224         usbhs_fifo_disable(pipe);
 225         do {
 226                 val  = usbhsp_pipectrl_get(pipe);
 227                 val &= PBUSY;
 228                 if (!val)
 229                         return 0;
 230
 231         } while (timeout--);
 232
 233         dev_err(dev, "pipe barrier failed\n");
 234
 235         return -EBUSY;
 236 }
 237
 238 static int usbhsp_pipe_is_accessible(struct usbhs_pipe *pipe)
 239 {
 240         u16 val;
 241
 242         val = usbhsp_pipectrl_get(pipe);
 243         if (val & BSTS)
 244                 return 0;
 245
 246         return -EBUSY;
 247 }
 248
 249 /*
 250  *              PID ctrl
 251  */
 252 static void __usbhsp_pid_try_nak_if_stall(struct usbhs_pipe *pipe)
 253 {
 254         u16 pid = usbhsp_pipectrl_get(pipe);
 255
 256         pid &= PID_MASK;
 257
 258         /*
 259          * see
 260          * "Pipe n Control Register" - "PID"
 261          */
 262         switch (pid) {
 263         case PID_STALL11:
 264                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
 265                 /* fall-through */
 266         case PID_STALL10:
 267                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
 268         }
 269 }
 270
 271 void usbhs_fifo_disable(struct usbhs_pipe *pipe)
 272 {
 273         /* see "Pipe n Control Register" - "PID" */
 274         __usbhsp_pid_try_nak_if_stall(pipe);
 275
 276         usbhsp_pipectrl_set(pipe, PID_MASK, PID_NAK);
 277 }
 278
 279 void usbhs_fifo_enable(struct usbhs_pipe *pipe)
 280 {
 281         /* see "Pipe n Control Register" - "PID" */
 282         __usbhsp_pid_try_nak_if_stall(pipe);
 283
 284         usbhsp_pipectrl_set(pipe, PID_MASK, PID_BUF);
 285 }
 286
 287 void usbhs_fifo_stall(struct usbhs_pipe *pipe)
 288 {
 289         u16 pid = usbhsp_pipectrl_get(pipe);
 290
 291         pid &= PID_MASK;
 292
 293         /*
 294          * see
 295          * "Pipe n Control Register" - "PID"
 296          */
 297         switch (pid) {
 298         case PID_NAK:
 299                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL10);
 300                 break;
 301         case PID_BUF:
 302                 usbhsp_pipectrl_set(pipe, PID_MASK, PID_STALL11);
 303                 break;
 304         }
 305 }
 306
 307 /*
 308  *              CFIFO ctrl
 309  */
 310 void usbhs_fifo_send_terminator(struct usbhs_pipe *pipe)
 311 {
 312         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 313
 314         usbhs_bset(priv, CFIFOCTR, BVAL, BVAL);
 315 }
 316
 317 static void usbhsp_fifo_clear(struct usbhs_pipe *pipe)
 318 {
 319         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 320
 321         usbhs_write(priv, CFIFOCTR, BCLR);
 322 }
 323
 324 static int usbhsp_fifo_barrier(struct usbhs_priv *priv)
 325 {
 326         int timeout = 1024;
 327
 328         do {
 329                 /* The FIFO port is accessible */
 330                 if (usbhs_read(priv, CFIFOCTR) & FRDY)
 331                         return 0;
 332
 333                 udelay(10);
 334         } while (timeout--);
 335
 336         return -EBUSY;
 337 }
 338
 339 static int usbhsp_fifo_rcv_len(struct usbhs_priv *priv)
 340 {
 341         return usbhs_read(priv, CFIFOCTR) & DTLN_MASK;
 342 }
 343
 344 static int usbhsp_fifo_select(struct usbhs_pipe *pipe, int write)
 345 {
 346         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 347         struct device *dev = usbhs_priv_to_dev(priv);
 348         int timeout = 1024;
 349         u16 mask = ((1 << 5) | 0xF);            /* mask of ISEL | CURPIPE */
 350         u16 base = usbhs_pipe_number(pipe);     /* CURPIPE */
 351
 352         if (usbhsp_is_dcp(pipe))
 353                 base |= (1 == write) << 5;      /* ISEL */
 354
 355         /* "base" will be used below  */
 356         usbhs_write(priv, CFIFOSEL, base | MBW_32);
 357
 358         /* check ISEL and CURPIPE value */
 359         while (timeout--) {
 360                 if (base == (mask & usbhs_read(priv, CFIFOSEL)))
 361                         return 0;
 362                 udelay(10);
 363         }
 364
 365         dev_err(dev, "fifo select error\n");
 366
 367         return -EIO;
 368 }
 369
 370 int usbhs_fifo_prepare_write(struct usbhs_pipe *pipe)
 371 {
 372         int ret;
 373
 374         ret = usbhsp_fifo_select(pipe, 1);
 375         if (ret < 0)
 376                 return ret;
 377
 378         usbhsp_fifo_clear(pipe);
 379
 380         return ret;
 381 }
 382
 383 int usbhs_fifo_write(struct usbhs_pipe *pipe, u8 *buf, int len)
 384 {
 385         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 386         void __iomem *addr = priv->base + CFIFO;
 387         int maxp = usbhs_pipe_get_maxpacket(pipe);
 388         int total_len;
 389         int i, ret;
 390
 391         ret = usbhsp_pipe_is_accessible(pipe);
 392         if (ret < 0)
 393                 return ret;
 394
 395         ret = usbhs_fifo_prepare_write(pipe);
 396         if (ret < 0)
 397                 return ret;
 398
 399         ret = usbhsp_fifo_barrier(priv);
 400         if (ret < 0)
 401                 return ret;
 402
 403         len = min(len, maxp);
 404         total_len = len;
 405
 406         /*
 407          * FIXME
 408          *
 409          * 32-bit access only
 410          */
 411         if (len >= 4 &&
 412             !((unsigned long)buf & 0x03)) {
 413                 iowrite32_rep(addr, buf, len / 4);
 414                 len %= 4;
 415                 buf += total_len - len;
 416         }
 417
 418         /* the rest operation */
 419         for (i = 0; i < len; i++)
 420                 iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
 421
 422         if (total_len < maxp)
 423                 usbhs_fifo_send_terminator(pipe);
 424
 425         return total_len;
 426 }
 427
 428 int usbhs_fifo_prepare_read(struct usbhs_pipe *pipe)
 429 {
 430         int ret;
 431
 432         /*
 433          * select pipe and enable it to prepare packet receive
 434          */
 435         ret = usbhsp_fifo_select(pipe, 0);
 436         if (ret < 0)
 437                 return ret;
 438
 439         usbhs_fifo_enable(pipe);
 440
 441         return ret;
 442 }
 443
 444 int usbhs_fifo_read(struct usbhs_pipe *pipe, u8 *buf, int len)
 445 {
 446         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 447         void __iomem *addr = priv->base + CFIFO;
 448         int rcv_len;
 449         int i, ret;
 450         int total_len;
 451         u32 data = 0;
 452
 453         ret = usbhsp_fifo_select(pipe, 0);
 454         if (ret < 0)
 455                 return ret;
 456
 457         ret = usbhsp_fifo_barrier(priv);
 458         if (ret < 0)
 459                 return ret;
 460
 461         rcv_len = usbhsp_fifo_rcv_len(priv);
 462
 463         /*
 464          * Buffer clear if Zero-Length packet
 465          *
 466          * see
 467          * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
 468          */
 469         if (0 == rcv_len) {
 470                 usbhsp_fifo_clear(pipe);
 471                 return 0;
 472         }
 473
 474         len = min(rcv_len, len);
 475         total_len = len;
 476
 477         /*
 478          * FIXME
 479          *
 480          * 32-bit access only
 481          */
 482         if (len >= 4 &&
 483             !((unsigned long)buf & 0x03)) {
 484                 ioread32_rep(addr, buf, len / 4);
 485                 len %= 4;
 486                 buf += rcv_len - len;
 487         }
 488
 489         /* the rest operation */
 490         for (i = 0; i < len; i++) {
 491                 if (!(i & 0x03))
 492                         data = ioread32(addr);
 493
 494                 buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
 495         }
 496
 497         return total_len;
 498 }
 499
 500 /*
 501  *              pipe setup
 502  */
 503 static int usbhsp_possible_double_buffer(struct usbhs_pipe *pipe)
 504 {
 505         /*
 506          * only ISO / BULK pipe can use double buffer
 507          */
 508         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK) ||
 509             usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC))
 510                 return 1;
 511
 512         return 0;
 513 }
 514
 515 static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
 516                                 const struct usb_endpoint_descriptor *desc,
 517                                 int is_host)
 518 {
 519         u16 type = 0;
 520         u16 bfre = 0;
 521         u16 dblb = 0;
 522         u16 cntmd = 0;
 523         u16 dir = 0;
 524         u16 epnum = 0;
 525         u16 shtnak = 0;
 526         u16 type_array[] = {
 527                 [USB_ENDPOINT_XFER_BULK] = TYPE_BULK,
 528                 [USB_ENDPOINT_XFER_INT]  = TYPE_INT,
 529                 [USB_ENDPOINT_XFER_ISOC] = TYPE_ISO,
 530         };
 531         int is_double = usbhsp_possible_double_buffer(pipe);
 532
 533         if (usbhsp_is_dcp(pipe))
 534                 return -EINVAL;
 535
 536         /*
 537          * PIPECFG
 538          *
 539          * see
 540          *  - "Register Descriptions" - "PIPECFG" register
 541          *  - "Features"  - "Pipe configuration"
 542          *  - "Operation" - "Pipe Control"
 543          */
 544
 545         /* TYPE */
 546         type = type_array[usbhsp_type(pipe)];
 547
 548         /* BFRE */
 549         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
 550             usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 551                 bfre = 0; /* FIXME */
 552
 553         /* DBLB */
 554         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_ISOC) ||
 555             usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 556                 dblb = (is_double) ? DBLB : 0;
 557
 558         /* CNTMD */
 559         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK))
 560                 cntmd = 0; /* FIXME */
 561
 562         /* DIR */
 563         if (usb_endpoint_dir_in(desc))
 564                 usbhsp_flags_set(pipe, IS_DIR_IN);
 565
 566         if ((is_host  && usb_endpoint_dir_out(desc)) ||
 567             (!is_host && usb_endpoint_dir_in(desc)))
 568                 dir |= DIR_OUT;
 569
 570         /* SHTNAK */
 571         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_BULK) &&
 572             !dir)
 573                 shtnak = SHTNAK;
 574
 575         /* EPNUM */
 576         epnum = 0xF & usb_endpoint_num(desc);
 577
 578         return  type    |
 579                 bfre    |
 580                 dblb    |
 581                 cntmd   |
 582                 dir     |
 583                 shtnak  |
 584                 epnum;
 585 }
 586
 587 static u16 usbhsp_setup_pipemaxp(struct usbhs_pipe *pipe,
 588                                  const struct usb_endpoint_descriptor *desc,
 589                                  int is_host)
 590 {
 591         /* host should set DEVSEL */
 592
 593         /* reutn MXPS */
 594         return PIPE_MAXP_MASK & le16_to_cpu(desc->wMaxPacketSize);
 595 }
 596
 597 static u16 usbhsp_setup_pipebuff(struct usbhs_pipe *pipe,
 598                                  const struct usb_endpoint_descriptor *desc,
 599                                  int is_host)
 600 {
 601         struct usbhs_priv *priv = usbhsp_pipe_to_priv(pipe);
 602         struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
 603         struct device *dev = usbhs_priv_to_dev(priv);
 604         int pipe_num = usbhs_pipe_number(pipe);
 605         int is_double = usbhsp_possible_double_buffer(pipe);
 606         u16 buff_size;
 607         u16 bufnmb;
 608         u16 bufnmb_cnt;
 609
 610         /*
 611          * PIPEBUF
 612          *
 613          * see
 614          *  - "Register Descriptions" - "PIPEBUF" register
 615          *  - "Features"  - "Pipe configuration"
 616          *  - "Operation" - "FIFO Buffer Memory"
 617          *  - "Operation" - "Pipe Control"
 618          *
 619          * ex) if pipe6 - pipe9 are USB_ENDPOINT_XFER_INT (SH7724)
 620          *
 621          * BUFNMB:      PIPE
 622          * 0:           pipe0 (DCP 256byte)
 623          * 1:           -
 624          * 2:           -
 625          * 3:           -
 626          * 4:           pipe6 (INT 64byte)
 627          * 5:           pipe7 (INT 64byte)
 628          * 6:           pipe8 (INT 64byte)
 629          * 7:           pipe9 (INT 64byte)
 630          * 8 - xx:      free (for BULK, ISOC)
 631          */
 632
 633         /*
 634          * FIXME
 635          *
 636          * it doesn't have good buffer allocator
 637          *
 638          * DCP : 256 byte
 639          * BULK: 512 byte
 640          * INT :  64 byte
 641          * ISOC: 512 byte
 642          */
 643         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_CONTROL))
 644                 buff_size = 256;
 645         else if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT))
 646                 buff_size = 64;
 647         else
 648                 buff_size = 512;
 649
 650         /* change buff_size to register value */
 651         bufnmb_cnt = (buff_size / 64) - 1;
 652
 653         /* BUFNMB has been reserved for INT pipe
 654          * see above */
 655         if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT)) {
 656                 bufnmb = pipe_num - 2;
 657         } else {
 658                 bufnmb = info->bufnmb_last;
 659                 info->bufnmb_last += bufnmb_cnt + 1;
 660
 661                 /*
 662                  * double buffer
 663                  */
 664                 if (is_double)
 665                         info->bufnmb_last += bufnmb_cnt + 1;
 666         }
 667
 668         dev_dbg(dev, "pipe : %d : buff_size 0x%x: bufnmb 0x%x\n",
 669                 pipe_num, buff_size, bufnmb);
 670
 671         return  (0x1f & bufnmb_cnt)     << 10 |
 672                 (0xff & bufnmb)         <<  0;
 673 }
 674
 675 /*
 676  *              pipe control
 677  */
 678 int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe)
 679 {
 680         u16 mask = usbhsp_is_dcp(pipe) ? DCP_MAXP_MASK : PIPE_MAXP_MASK;
 681
 682         usbhsp_pipe_select(pipe);
 683
 684         return (int)(usbhsp_pipe_maxp_get(pipe) & mask);
 685 }
 686
 687 int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe)
 688 {
 689         return usbhsp_flags_has(pipe, IS_DIR_IN);
 690 }
 691
 692 void usbhs_pipe_clear_sequence(struct usbhs_pipe *pipe)
 693 {
 694         usbhsp_pipectrl_set(pipe, SQCLR, SQCLR);
 695 }
 696
 697 static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
 698 {
 699         struct usbhs_pipe *pos, *pipe;
 700         int i;
 701
 702         /*
 703          * find target pipe
 704          */
 705         pipe = NULL;
 706         usbhs_for_each_pipe_with_dcp(pos, priv, i) {
 707                 if (!usbhsp_type_is(pos, type))
 708                         continue;
 709                 if (usbhsp_flags_has(pos, IS_USED))
 710                         continue;
 711
 712                 pipe = pos;
 713                 break;
 714         }
 715
 716         if (!pipe)
 717                 return NULL;
 718
 719         /*
 720          * initialize pipe flags
 721          */
 722         usbhsp_flags_init(pipe);
 723         usbhsp_flags_set(pipe, IS_USED);
 724
 725         return pipe;
 726 }
 727
 728 void usbhs_pipe_init(struct usbhs_priv *priv)
 729 {
 730         struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
 731         struct usbhs_pipe *pipe;
 732         int i;
 733
 734         /*
 735          * FIXME
 736          *
 737          * driver needs good allocator.
 738          *
 739          * find first free buffer area (BULK, ISOC)
 740          * (DCP, INT area is fixed)
 741          *
 742          * buffer number 0 - 3 have been reserved for DCP
 743          * see
 744          *      usbhsp_to_bufnmb
 745          */
 746         info->bufnmb_last = 4;
 747         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 748                 if (usbhsp_type_is(pipe, USB_ENDPOINT_XFER_INT))
 749                         info->bufnmb_last++;
 750
 751                 usbhsp_flags_init(pipe);
 752                 pipe->mod_private = NULL;
 753         }
 754 }
 755
 756 struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
 757                                      const struct usb_endpoint_descriptor *desc)
 758 {
 759         struct device *dev = usbhs_priv_to_dev(priv);
 760         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 761         struct usbhs_pipe *pipe;
 762         int is_host = usbhs_mod_is_host(priv, mod);
 763         int ret;
 764         u16 pipecfg, pipebuf, pipemaxp;
 765
 766         pipe = usbhsp_get_pipe(priv, usb_endpoint_type(desc));
 767         if (!pipe)
 768                 return NULL;
 769
 770         usbhs_fifo_disable(pipe);
 771
 772         /* make sure pipe is not busy */
 773         ret = usbhsp_pipe_barrier(pipe);
 774         if (ret < 0) {
 775                 dev_err(dev, "pipe setup failed %d\n", usbhs_pipe_number(pipe));
 776                 return NULL;
 777         }
 778
 779         pipecfg  = usbhsp_setup_pipecfg(pipe,  desc, is_host);
 780         pipebuf  = usbhsp_setup_pipebuff(pipe, desc, is_host);
 781         pipemaxp = usbhsp_setup_pipemaxp(pipe, desc, is_host);
 782
 783         /* buffer clear
 784          * see PIPECFG :: BFRE */
 785         usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
 786         usbhsp_pipectrl_set(pipe, ACLRM, 0);
 787
 788         usbhsp_pipe_select(pipe);
 789         usbhsp_pipe_cfg_set(pipe, 0xFFFF, pipecfg);
 790         usbhsp_pipe_buf_set(pipe, 0xFFFF, pipebuf);
 791         usbhsp_pipe_maxp_set(pipe, 0xFFFF, pipemaxp);
 792
 793         usbhs_pipe_clear_sequence(pipe);
 794
 795         dev_dbg(dev, "enable pipe %d : %s (%s)\n",
 796                 usbhs_pipe_number(pipe),
 797                 usbhsp_pipe_name[usb_endpoint_type(desc)],
 798                 usbhs_pipe_is_dir_in(pipe) ? "in" : "out");
 799
 800         return pipe;
 801 }
 802
 803 /*
 804  *              dcp control
 805  */
 806 struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv)
 807 {
 808         struct usbhs_pipe *pipe;
 809
 810         pipe = usbhsp_get_pipe(priv, USB_ENDPOINT_XFER_CONTROL);
 811         if (!pipe)
 812                 return NULL;
 813
 814         /*
 815          * dcpcfg  : default
 816          * dcpmaxp : default
 817          * pipebuf : nothing to do
 818          */
 819
 820         usbhsp_pipe_select(pipe);
 821         usbhs_pipe_clear_sequence(pipe);
 822
 823         return pipe;
 824 }
 825
 826 void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe)
 827 {
 828         WARN_ON(!usbhsp_is_dcp(pipe));
 829
 830         usbhs_fifo_enable(pipe);
 831         usbhsp_pipectrl_set(pipe, CCPL, CCPL);
 832 }
 833
 834
 835 /*
 836  *              pipe module function
 837  */
 838 int usbhs_pipe_probe(struct usbhs_priv *priv)
 839 {
 840         struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
 841         struct usbhs_pipe *pipe;
 842         struct device *dev = usbhs_priv_to_dev(priv);
 843         u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
 844         int pipe_size = usbhs_get_dparam(priv, pipe_size);
 845         int i;
 846
 847         /* This driver expects 1st pipe is DCP */
 848         if (pipe_type[0] != USB_ENDPOINT_XFER_CONTROL) {
 849                 dev_err(dev, "1st PIPE is not DCP\n");
 850                 return -EINVAL;
 851         }
 852
 853         info->pipe = kzalloc(sizeof(struct usbhs_pipe) * pipe_size, GFP_KERNEL);
 854         if (!info->pipe) {
 855                 dev_err(dev, "Could not allocate pipe\n");
 856                 return -ENOMEM;
 857         }
 858
 859         info->size = pipe_size;
 860
 861         /*
 862          * init pipe
 863          */
 864         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 865                 pipe->priv = priv;
 866                 usbhsp_type(pipe) = pipe_type[i] & USB_ENDPOINT_XFERTYPE_MASK;
 867
 868                 dev_dbg(dev, "pipe %x\t: %s\n",
 869                         i, usbhsp_pipe_name[pipe_type[i]]);
 870         }
 871
 872         return 0;
 873 }
 874
 875 void usbhs_pipe_remove(struct usbhs_priv *priv)
 876 {
 877         struct usbhs_pipe_info *info = usbhsp_priv_to_pipeinfo(priv);
 878
 879         kfree(info->pipe);
 880 }