drivers/usb/renesas_usbhs/mod_host.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/io.h>
  18 #include <linux/list.h>
  19 #include <linux/module.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/slab.h>
  22 #include <linux/usb.h>
  23 #include <linux/usb/hcd.h>
  24 #include "common.h"
  25
  26 /*
  27  *** HARDWARE LIMITATION ***
  28  *
  29  * 1) renesas_usbhs has a limited number of controllable devices.
  30  *    it can control only 9 devices in generally.
  31  *      see DEVADDn / DCPMAXP / PIPEMAXP.
  32  *
  33  * 2) renesas_usbhs pipe number is limited.
  34  *    the pipe will be re-used for each devices.
  35  *    so, software should control DATA0/1 sequence of each devices.
  36  */
  37
  38
  39 /*
  40  *              image of mod_host
  41  *
  42  * +--------+
  43  * | udev 0 | --> it is used when set address
  44  * +--------+
  45  *
  46  * +--------+                                   pipes are reused for each uep.
  47  * | udev 1 |-+- [uep 0 (dcp) ] --+             pipe will be switched when
  48  * +--------+ |                   |             other device requested
  49  *            +- [uep 1 (bulk)] --|---+            +--------------+
  50  *            |                   +--------------> | pipe0 (dcp)  |
  51  *            +- [uep 2 (bulk)] -@    |            +--------------+
  52  *                                    |            | pipe1 (isoc) |
  53  * +--------+                         |            +--------------+
  54  * | udev 2 |-+- [uep 0 (dcp) ] -@    +----------> | pipe2 (bulk) |
  55  * +--------+ |                                    +--------------+
  56  *            +- [uep 1 (int) ] ----+     +------> | pipe3 (bulk) |
  57  *                                  |     |        +--------------+
  58  * +--------+                       +-----|------> | pipe4 (int)  |
  59  * | udev 3 |-+- [uep 0 (dcp) ] -@        |        +--------------+
  60  * +--------+ |                           |        | ....         |
  61  *            +- [uep 1 (bulk)] -@        |        | ....         |
  62  *            |                           |
  63  *            +- [uep 2 (bulk)]-----------+
  64  *
  65  * @ :  uep requested free pipe, but all have been used.
  66  *      now it is waiting for free pipe
  67  */
  68
  69
  70 /*
  71  *              struct
  72  */
  73 struct usbhsh_request {
  74         struct urb              *urb;
  75         struct usbhs_pkt        pkt;
  76 };
  77
  78 struct usbhsh_device {
  79         struct usb_device       *usbv;
  80         struct list_head        ep_list_head; /* list of usbhsh_ep */
  81 };
  82
  83 struct usbhsh_ep {
  84         struct usbhs_pipe       *pipe;   /* attached pipe */
  85         struct usbhsh_device    *udev;   /* attached udev */
  86         struct usb_host_endpoint *ep;
  87         struct list_head        ep_list; /* list to usbhsh_device */
  88 };
  89
  90 #define USBHSH_DEVICE_MAX       10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
  91 #define USBHSH_PORT_MAX          7 /* see DEVADDn :: HUBPORT */
  92 struct usbhsh_hpriv {
  93         struct usbhs_mod        mod;
  94         struct usbhs_pipe       *dcp;
  95
  96         struct usbhsh_device    udev[USBHSH_DEVICE_MAX];
  97
  98         u32     port_stat;      /* USB_PORT_STAT_xxx */
  99
 100         struct completion       setup_ack_done;
 101 };
 102
 103
 104 static const char usbhsh_hcd_name[] = "renesas_usbhs host";
 105
 106 /*
 107  *              macro
 108  */
 109 #define usbhsh_priv_to_hpriv(priv) \
 110         container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
 111
 112 #define __usbhsh_for_each_udev(start, pos, h, i)        \
 113         for (i = start, pos = (h)->udev + i;            \
 114              i < USBHSH_DEVICE_MAX;                     \
 115              i++, pos = (h)->udev + i)
 116
 117 #define usbhsh_for_each_udev(pos, hpriv, i)     \
 118         __usbhsh_for_each_udev(1, pos, hpriv, i)
 119
 120 #define usbhsh_for_each_udev_with_dev0(pos, hpriv, i)   \
 121         __usbhsh_for_each_udev(0, pos, hpriv, i)
 122
 123 #define usbhsh_hcd_to_hpriv(h)  (struct usbhsh_hpriv *)((h)->hcd_priv)
 124 #define usbhsh_hcd_to_dev(h)    ((h)->self.controller)
 125
 126 #define usbhsh_hpriv_to_priv(h) ((h)->mod.priv)
 127 #define usbhsh_hpriv_to_dcp(h)  ((h)->dcp)
 128 #define usbhsh_hpriv_to_hcd(h)  \
 129         container_of((void *)h, struct usb_hcd, hcd_priv)
 130
 131 #define usbhsh_ep_to_uep(u)     ((u)->hcpriv)
 132 #define usbhsh_uep_to_pipe(u)   ((u)->pipe)
 133 #define usbhsh_uep_to_udev(u)   ((u)->udev)
 134 #define usbhsh_uep_to_ep(u)     ((u)->ep)
 135
 136 #define usbhsh_urb_to_ureq(u)   ((u)->hcpriv)
 137 #define usbhsh_urb_to_usbv(u)   ((u)->dev)
 138
 139 #define usbhsh_usbv_to_udev(d)  dev_get_drvdata(&(d)->dev)
 140
 141 #define usbhsh_udev_to_usbv(h)  ((h)->usbv)
 142 #define usbhsh_udev_is_used(h)  usbhsh_udev_to_usbv(h)
 143
 144 #define usbhsh_pipe_to_uep(p)   ((p)->mod_private)
 145
 146 #define usbhsh_device_parent(d)         (usbhsh_usbv_to_udev((d)->usbv->parent))
 147 #define usbhsh_device_hubport(d)        ((d)->usbv->portnum)
 148 #define usbhsh_device_number(h, d)      ((int)((d) - (h)->udev))
 149 #define usbhsh_device_nth(h, d)         ((h)->udev + d)
 150 #define usbhsh_device0(h)               usbhsh_device_nth(h, 0)
 151
 152 #define usbhsh_port_stat_init(h)        ((h)->port_stat = 0)
 153 #define usbhsh_port_stat_set(h, s)      ((h)->port_stat |= (s))
 154 #define usbhsh_port_stat_clear(h, s)    ((h)->port_stat &= ~(s))
 155 #define usbhsh_port_stat_get(h)         ((h)->port_stat)
 156
 157 #define usbhsh_pkt_to_ureq(p)   \
 158         container_of((void *)p, struct usbhsh_request, pkt)
 159
 160 /*
 161  *              req alloc/free
 162  */
 163 static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv,
 164                                                struct urb *urb,
 165                                                gfp_t mem_flags)
 166 {
 167         struct usbhsh_request *ureq;
 168         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 169         struct device *dev = usbhs_priv_to_dev(priv);
 170
 171         ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
 172         if (!ureq) {
 173                 dev_err(dev, "ureq alloc fail\n");
 174                 return NULL;
 175         }
 176
 177         usbhs_pkt_init(&ureq->pkt);
 178         ureq->urb = urb;
 179         usbhsh_urb_to_ureq(urb) = ureq;
 180
 181         return ureq;
 182 }
 183
 184 static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
 185                             struct usbhsh_request *ureq)
 186 {
 187         usbhsh_urb_to_ureq(ureq->urb) = NULL;
 188         ureq->urb = NULL;
 189
 190         kfree(ureq);
 191 }
 192
 193 /*
 194  *              pipe control
 195  */
 196 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
 197                                                struct urb *urb);
 198
 199 static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
 200                               struct urb *urb)
 201 {
 202         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 203         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 204         struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
 205         struct usbhs_pipe *pipe;
 206         struct usb_endpoint_descriptor *desc = &urb->ep->desc;
 207         struct device *dev = usbhs_priv_to_dev(priv);
 208         unsigned long flags;
 209         int dir_in_req = !!usb_pipein(urb->pipe);
 210         int is_dcp = usb_endpoint_xfer_control(desc);
 211         int i, dir_in;
 212         int ret = -EBUSY;
 213
 214         /********************  spin lock ********************/
 215         usbhs_lock(priv, flags);
 216
 217         if (unlikely(usbhsh_uep_to_pipe(uep))) {
 218                 dev_err(dev, "uep already has pipe\n");
 219                 goto usbhsh_pipe_attach_done;
 220         }
 221
 222         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 223
 224                 /* check pipe type */
 225                 if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
 226                         continue;
 227
 228                 /* check pipe direction if normal pipe */
 229                 if (!is_dcp) {
 230                         dir_in = !!usbhs_pipe_is_dir_in(pipe);
 231                         if (0 != (dir_in - dir_in_req))
 232                                 continue;
 233                 }
 234
 235                 /* check pipe is free */
 236                 if (usbhsh_pipe_to_uep(pipe))
 237                         continue;
 238
 239                 /*
 240                  * attach pipe to uep
 241                  *
 242                  * usbhs_pipe_config_update() should be called after
 243                  * usbhs_set_device_config()
 244                  * see
 245                  *  DCPMAXP/PIPEMAXP
 246                  */
 247                 usbhsh_uep_to_pipe(uep)         = pipe;
 248                 usbhsh_pipe_to_uep(pipe)        = uep;
 249
 250                 if (!usb_gettoggle(urb->dev,
 251                                    usb_pipeendpoint(urb->pipe),
 252                                    usb_pipeout(urb->pipe))) {
 253                         usbhs_pipe_sequence_data0(pipe);
 254                         usb_settoggle(urb->dev,
 255                                       usb_pipeendpoint(urb->pipe),
 256                                       usb_pipeout(urb->pipe), 1);
 257                 }
 258
 259                 usbhs_pipe_config_update(pipe,
 260                                          usbhsh_device_number(hpriv, udev),
 261                                          usb_endpoint_num(desc),
 262                                          usb_endpoint_maxp(desc));
 263
 264                 dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
 265                         usbhsh_device_number(hpriv, udev),
 266                         usb_endpoint_num(desc),
 267                         usbhs_pipe_name(pipe),
 268                         dir_in_req ? "in" : "out");
 269
 270                 ret = 0;
 271                 break;
 272         }
 273
 274 usbhsh_pipe_attach_done:
 275         usbhs_unlock(priv, flags);
 276         /********************  spin unlock ******************/
 277
 278         return ret;
 279 }
 280
 281 static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
 282                                struct usbhsh_ep *uep)
 283 {
 284         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 285         struct usbhs_pipe *pipe;
 286         struct device *dev = usbhs_priv_to_dev(priv);
 287         unsigned long flags;
 288
 289         /********************  spin lock ********************/
 290         usbhs_lock(priv, flags);
 291
 292         pipe = usbhsh_uep_to_pipe(uep);
 293
 294         if (unlikely(!pipe)) {
 295                 dev_err(dev, "uep doens't have pipe\n");
 296         } else {
 297                 struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
 298                 struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
 299
 300                 /* detach pipe from uep */
 301                 usbhsh_uep_to_pipe(uep)         = NULL;
 302                 usbhsh_pipe_to_uep(pipe)        = NULL;
 303
 304                 dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
 305                         usbhsh_device_number(hpriv, udev),
 306                         usb_endpoint_num(&ep->desc),
 307                         usbhs_pipe_name(pipe));
 308         }
 309
 310         usbhs_unlock(priv, flags);
 311         /********************  spin unlock ******************/
 312 }
 313
 314 /*
 315  *              endpoint control
 316  */
 317 static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
 318                                   struct urb *urb,
 319                                   gfp_t mem_flags)
 320 {
 321         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 322         struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
 323         struct usb_host_endpoint *ep = urb->ep;
 324         struct usbhsh_ep *uep;
 325         struct device *dev = usbhs_priv_to_dev(priv);
 326         struct usb_endpoint_descriptor *desc = &ep->desc;
 327         unsigned long flags;
 328
 329         uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
 330         if (!uep) {
 331                 dev_err(dev, "usbhsh_ep alloc fail\n");
 332                 return -ENOMEM;
 333         }
 334
 335         /********************  spin lock ********************/
 336         usbhs_lock(priv, flags);
 337
 338         /*
 339          * init endpoint
 340          */
 341         INIT_LIST_HEAD(&uep->ep_list);
 342         list_add_tail(&uep->ep_list, &udev->ep_list_head);
 343
 344         usbhsh_uep_to_udev(uep) = udev;
 345         usbhsh_uep_to_ep(uep)   = ep;
 346         usbhsh_ep_to_uep(ep)    = uep;
 347
 348         usbhs_unlock(priv, flags);
 349         /********************  spin unlock ******************/
 350
 351         dev_dbg(dev, "%s [%d-%d]\n", __func__,
 352                 usbhsh_device_number(hpriv, udev),
 353                 usb_endpoint_num(desc));
 354
 355         return 0;
 356 }
 357
 358 static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
 359                                    struct usb_host_endpoint *ep)
 360 {
 361         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 362         struct device *dev = usbhs_priv_to_dev(priv);
 363         struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
 364         unsigned long flags;
 365
 366         if (!uep)
 367                 return;
 368
 369         dev_dbg(dev, "%s [%d-%d]\n", __func__,
 370                 usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
 371                 usb_endpoint_num(&ep->desc));
 372
 373         if (usbhsh_uep_to_pipe(uep))
 374                 usbhsh_pipe_detach(hpriv, uep);
 375
 376         /********************  spin lock ********************/
 377         usbhs_lock(priv, flags);
 378
 379         /* remove this endpoint from udev */
 380         list_del_init(&uep->ep_list);
 381
 382         usbhsh_uep_to_udev(uep) = NULL;
 383         usbhsh_uep_to_ep(uep)   = NULL;
 384         usbhsh_ep_to_uep(ep)    = NULL;
 385
 386         usbhs_unlock(priv, flags);
 387         /********************  spin unlock ******************/
 388
 389         kfree(uep);
 390 }
 391
 392 static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
 393                                        struct usbhsh_device *udev)
 394 {
 395         struct usbhsh_ep *uep, *next;
 396
 397         list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
 398                 usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
 399 }
 400
 401 /*
 402  *              device control
 403  */
 404 static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
 405                                      struct usbhsh_device *udev)
 406 {
 407         struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
 408
 409         return hcd->self.root_hub == usbv->parent;
 410 }
 411
 412 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
 413 {
 414         return !list_empty(&udev->ep_list_head);
 415 }
 416
 417 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
 418                                                struct urb *urb)
 419 {
 420         struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 421         struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 422
 423         /* usbhsh_device_attach() is still not called */
 424         if (!udev)
 425                 return NULL;
 426
 427         /* if it is device0, return it */
 428         if (0 == usb_pipedevice(urb->pipe))
 429                 return usbhsh_device0(hpriv);
 430
 431         /* return attached device */
 432         return udev;
 433 }
 434
 435 static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
 436                                                  struct urb *urb)
 437 {
 438         struct usbhsh_device *udev = NULL;
 439         struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
 440         struct usbhsh_device *pos;
 441         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 442         struct device *dev = usbhsh_hcd_to_dev(hcd);
 443         struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 444         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 445         unsigned long flags;
 446         u16 upphub, hubport;
 447         int i;
 448
 449         /*
 450          * This function should be called only while urb is pointing to device0.
 451          * It will attach unused usbhsh_device to urb (usbv),
 452          * and initialize device0.
 453          * You can use usbhsh_device_get() to get "current" udev,
 454          * and usbhsh_usbv_to_udev() is for "attached" udev.
 455          */
 456         if (0 != usb_pipedevice(urb->pipe)) {
 457                 dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
 458                 return NULL;
 459         }
 460
 461         /********************  spin lock ********************/
 462         usbhs_lock(priv, flags);
 463
 464         /*
 465          * find unused device
 466          */
 467         usbhsh_for_each_udev(pos, hpriv, i) {
 468                 if (usbhsh_udev_is_used(pos))
 469                         continue;
 470                 udev = pos;
 471                 break;
 472         }
 473
 474         if (udev) {
 475                 /*
 476                  * usbhsh_usbv_to_udev()
 477                  * usbhsh_udev_to_usbv()
 478                  * will be enable
 479                  */
 480                 dev_set_drvdata(&usbv->dev, udev);
 481                 udev->usbv = usbv;
 482         }
 483
 484         usbhs_unlock(priv, flags);
 485         /********************  spin unlock ******************/
 486
 487         if (!udev) {
 488                 dev_err(dev, "no free usbhsh_device\n");
 489                 return NULL;
 490         }
 491
 492         if (usbhsh_device_has_endpoint(udev)) {
 493                 dev_warn(dev, "udev have old endpoint\n");
 494                 usbhsh_endpoint_detach_all(hpriv, udev);
 495         }
 496
 497         if (usbhsh_device_has_endpoint(udev0)) {
 498                 dev_warn(dev, "udev0 have old endpoint\n");
 499                 usbhsh_endpoint_detach_all(hpriv, udev0);
 500         }
 501
 502         /* uep will be attached */
 503         INIT_LIST_HEAD(&udev0->ep_list_head);
 504         INIT_LIST_HEAD(&udev->ep_list_head);
 505
 506         /*
 507          * set device0 config
 508          */
 509         usbhs_set_device_config(priv,
 510                                 0, 0, 0, usbv->speed);
 511
 512         /*
 513          * set new device config
 514          */
 515         upphub  = 0;
 516         hubport = 0;
 517         if (!usbhsh_connected_to_rhdev(hcd, udev)) {
 518                 /* if udev is not connected to rhdev, it means parent is Hub */
 519                 struct usbhsh_device *parent = usbhsh_device_parent(udev);
 520
 521                 upphub  = usbhsh_device_number(hpriv, parent);
 522                 hubport = usbhsh_device_hubport(udev);
 523
 524                 dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__,
 525                         upphub, hubport, parent);
 526         }
 527
 528         usbhs_set_device_config(priv,
 529                                usbhsh_device_number(hpriv, udev),
 530                                upphub, hubport, usbv->speed);
 531
 532         dev_dbg(dev, "%s [%d](%p)\n", __func__,
 533                 usbhsh_device_number(hpriv, udev), udev);
 534
 535         return udev;
 536 }
 537
 538 static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
 539                                struct usbhsh_device *udev)
 540 {
 541         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 542         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 543         struct device *dev = usbhsh_hcd_to_dev(hcd);
 544         struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
 545         unsigned long flags;
 546
 547         dev_dbg(dev, "%s [%d](%p)\n", __func__,
 548                 usbhsh_device_number(hpriv, udev), udev);
 549
 550         if (usbhsh_device_has_endpoint(udev)) {
 551                 dev_warn(dev, "udev still have endpoint\n");
 552                 usbhsh_endpoint_detach_all(hpriv, udev);
 553         }
 554
 555         /*
 556          * There is nothing to do if it is device0.
 557          * see
 558          *  usbhsh_device_attach()
 559          *  usbhsh_device_get()
 560          */
 561         if (0 == usbhsh_device_number(hpriv, udev))
 562                 return;
 563
 564         /********************  spin lock ********************/
 565         usbhs_lock(priv, flags);
 566
 567         /*
 568          * usbhsh_usbv_to_udev()
 569          * usbhsh_udev_to_usbv()
 570          * will be disable
 571          */
 572         dev_set_drvdata(&usbv->dev, NULL);
 573         udev->usbv = NULL;
 574
 575         usbhs_unlock(priv, flags);
 576         /********************  spin unlock ******************/
 577 }
 578
 579 /*
 580  *              queue push/pop
 581  */
 582 static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
 583 {
 584         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 585         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 586         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 587         struct urb *urb = ureq->urb;
 588         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 589         struct device *dev = usbhs_priv_to_dev(priv);
 590
 591         dev_dbg(dev, "%s\n", __func__);
 592
 593         if (!urb) {
 594                 dev_warn(dev, "pkt doesn't have urb\n");
 595                 return;
 596         }
 597
 598         urb->actual_length = pkt->actual;
 599         usbhsh_ureq_free(hpriv, ureq);
 600
 601         usb_hcd_unlink_urb_from_ep(hcd, urb);
 602         usb_hcd_giveback_urb(hcd, urb, 0);
 603
 604         usbhsh_pipe_detach(hpriv, uep);
 605 }
 606
 607 static int usbhsh_queue_push(struct usb_hcd *hcd,
 608                              struct urb *urb,
 609                              gfp_t mem_flags)
 610 {
 611         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 612         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 613         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 614         struct device *dev = usbhsh_hcd_to_dev(hcd);
 615         struct usbhsh_request *ureq;
 616         void *buf;
 617         int len;
 618
 619         if (usb_pipeisoc(urb->pipe)) {
 620                 dev_err(dev, "pipe iso is not supported now\n");
 621                 return -EIO;
 622         }
 623
 624         /* this ureq will be freed on usbhsh_queue_done() */
 625         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 626         if (unlikely(!ureq)) {
 627                 dev_err(dev, "ureq alloc fail\n");
 628                 return -ENOMEM;
 629         }
 630
 631         if (usb_pipein(urb->pipe))
 632                 pipe->handler = &usbhs_fifo_pio_pop_handler;
 633         else
 634                 pipe->handler = &usbhs_fifo_pio_push_handler;
 635
 636         buf = (void *)(urb->transfer_buffer + urb->actual_length);
 637         len = urb->transfer_buffer_length - urb->actual_length;
 638
 639         dev_dbg(dev, "%s\n", __func__);
 640         usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
 641                        buf, len, (urb->transfer_flags & URB_ZERO_PACKET));
 642         usbhs_pkt_start(pipe);
 643
 644         return 0;
 645 }
 646
 647 /*
 648  *              DCP setup stage
 649  */
 650 static int usbhsh_is_request_address(struct urb *urb)
 651 {
 652         struct usb_ctrlrequest *req;
 653
 654         req = (struct usb_ctrlrequest *)urb->setup_packet;
 655
 656         if ((DeviceOutRequest    == req->bRequestType << 8) &&
 657             (USB_REQ_SET_ADDRESS == req->bRequest))
 658                 return 1;
 659         else
 660                 return 0;
 661 }
 662
 663 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
 664                                            struct urb *urb,
 665                                            struct usbhs_pipe *pipe)
 666 {
 667         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 668         struct usb_ctrlrequest req;
 669         struct device *dev = usbhs_priv_to_dev(priv);
 670
 671         /*
 672          * wait setup packet ACK
 673          * see
 674          *      usbhsh_irq_setup_ack()
 675          *      usbhsh_irq_setup_err()
 676          */
 677         init_completion(&hpriv->setup_ack_done);
 678
 679         /* copy original request */
 680         memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
 681
 682         /*
 683          * renesas_usbhs can not use original usb address.
 684          * see HARDWARE LIMITATION.
 685          * modify usb address here to use attached device.
 686          * see usbhsh_device_attach()
 687          */
 688         if (usbhsh_is_request_address(urb)) {
 689                 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 690                 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 691
 692                 /* udev is a attached device */
 693                 req.wValue = usbhsh_device_number(hpriv, udev);
 694                 dev_dbg(dev, "create new address - %d\n", req.wValue);
 695         }
 696
 697         /* set request */
 698         usbhs_usbreq_set_val(priv, &req);
 699
 700         /*
 701          * wait setup packet ACK
 702          */
 703         wait_for_completion(&hpriv->setup_ack_done);
 704
 705         dev_dbg(dev, "%s done\n", __func__);
 706 }
 707
 708 /*
 709  *              DCP data stage
 710  */
 711 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
 712                                           struct usbhs_pkt *pkt)
 713 {
 714         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 715         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 716
 717         /* this ureq was connected to urb when usbhsh_urb_enqueue()  */
 718
 719         usbhsh_ureq_free(hpriv, ureq);
 720 }
 721
 722 static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
 723                                          struct urb *urb,
 724                                          struct usbhs_pipe *pipe,
 725                                          gfp_t mem_flags)
 726
 727 {
 728         struct usbhsh_request *ureq;
 729
 730         /* this ureq will be freed on usbhsh_data_stage_packet_done() */
 731         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 732         if (unlikely(!ureq))
 733                 return -ENOMEM;
 734
 735         if (usb_pipein(urb->pipe))
 736                 pipe->handler = &usbhs_dcp_data_stage_in_handler;
 737         else
 738                 pipe->handler = &usbhs_dcp_data_stage_out_handler;
 739
 740         usbhs_pkt_push(pipe, &ureq->pkt,
 741                        usbhsh_data_stage_packet_done,
 742                        urb->transfer_buffer,
 743                        urb->transfer_buffer_length,
 744                        (urb->transfer_flags & URB_ZERO_PACKET));
 745
 746         return 0;
 747 }
 748
 749 /*
 750  *              DCP status stage
 751  */
 752 static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
 753                                             struct urb *urb,
 754                                             struct usbhs_pipe *pipe,
 755                                             gfp_t mem_flags)
 756 {
 757         struct usbhsh_request *ureq;
 758
 759         /* This ureq will be freed on usbhsh_queue_done() */
 760         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 761         if (unlikely(!ureq))
 762                 return -ENOMEM;
 763
 764         if (usb_pipein(urb->pipe))
 765                 pipe->handler = &usbhs_dcp_status_stage_in_handler;
 766         else
 767                 pipe->handler = &usbhs_dcp_status_stage_out_handler;
 768
 769         usbhs_pkt_push(pipe, &ureq->pkt,
 770                        usbhsh_queue_done,
 771                        NULL,
 772                        urb->transfer_buffer_length,
 773                        0);
 774
 775         return 0;
 776 }
 777
 778 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
 779                                  struct urb *urb,
 780                                  gfp_t mflags)
 781 {
 782         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 783         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 784         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 785         struct device *dev = usbhsh_hcd_to_dev(hcd);
 786         int ret;
 787
 788         dev_dbg(dev, "%s\n", __func__);
 789
 790         /*
 791          * setup stage
 792          *
 793          * usbhsh_send_setup_stage_packet() wait SACK/SIGN
 794          */
 795         usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
 796
 797         /*
 798          * data stage
 799          *
 800          * It is pushed only when urb has buffer.
 801          */
 802         if (urb->transfer_buffer_length) {
 803                 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
 804                 if (ret < 0) {
 805                         dev_err(dev, "data stage failed\n");
 806                         return ret;
 807                 }
 808         }
 809
 810         /*
 811          * status stage
 812          */
 813         ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
 814         if (ret < 0) {
 815                 dev_err(dev, "status stage failed\n");
 816                 return ret;
 817         }
 818
 819         /*
 820          * start pushed packets
 821          */
 822         usbhs_pkt_start(pipe);
 823
 824         return 0;
 825 }
 826
 827 /*
 828  *              dma map functions
 829  */
 830 static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
 831 {
 832         return 0;
 833 }
 834
 835 /*
 836  *              for hc_driver
 837  */
 838 static int usbhsh_host_start(struct usb_hcd *hcd)
 839 {
 840         return 0;
 841 }
 842
 843 static void usbhsh_host_stop(struct usb_hcd *hcd)
 844 {
 845 }
 846
 847 static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
 848                               struct urb *urb,
 849                               gfp_t mem_flags)
 850 {
 851         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 852         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 853         struct device *dev = usbhs_priv_to_dev(priv);
 854         struct usb_host_endpoint *ep = urb->ep;
 855         struct usbhsh_device *new_udev = NULL;
 856         int is_dir_in = usb_pipein(urb->pipe);
 857         int i;
 858         int ret;
 859
 860         dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
 861
 862         ret = usb_hcd_link_urb_to_ep(hcd, urb);
 863         if (ret)
 864                 goto usbhsh_urb_enqueue_error_not_linked;
 865
 866         /*
 867          * attach udev if needed
 868          * see [image of mod_host]
 869          */
 870         if (!usbhsh_device_get(hpriv, urb)) {
 871                 new_udev = usbhsh_device_attach(hpriv, urb);
 872                 if (!new_udev) {
 873                         ret = -EIO;
 874                         goto usbhsh_urb_enqueue_error_not_linked;
 875                 }
 876         }
 877
 878         /*
 879          * attach endpoint if needed
 880          * see [image of mod_host]
 881          */
 882         if (!usbhsh_ep_to_uep(ep)) {
 883                 ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
 884                 if (ret < 0)
 885                         goto usbhsh_urb_enqueue_error_free_device;
 886         }
 887
 888         /*
 889          * attach pipe to endpoint
 890          * see [image of mod_host]
 891          */
 892         for (i = 0; i < 1024; i++) {
 893                 ret = usbhsh_pipe_attach(hpriv, urb);
 894                 if (ret < 0)
 895                         msleep(100);
 896                 else
 897                         break;
 898         }
 899         if (ret < 0)
 900                 goto usbhsh_urb_enqueue_error_free_endpoint;
 901
 902         /*
 903          * push packet
 904          */
 905         if (usb_pipecontrol(urb->pipe))
 906                 ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
 907         else
 908                 ret = usbhsh_queue_push(hcd, urb, mem_flags);
 909
 910         return ret;
 911
 912 usbhsh_urb_enqueue_error_free_endpoint:
 913         usbhsh_endpoint_detach(hpriv, ep);
 914 usbhsh_urb_enqueue_error_free_device:
 915         if (new_udev)
 916                 usbhsh_device_detach(hpriv, new_udev);
 917 usbhsh_urb_enqueue_error_not_linked:
 918
 919         dev_dbg(dev, "%s error\n", __func__);
 920
 921         return ret;
 922 }
 923
 924 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 925 {
 926         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 927         struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
 928
 929         if (ureq) {
 930                 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 931                 struct usbhs_pkt *pkt = &ureq->pkt;
 932
 933                 usbhs_pkt_pop(pkt->pipe, pkt);
 934                 usbhsh_queue_done(priv, pkt);
 935         }
 936
 937         return 0;
 938 }
 939
 940 static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
 941                                     struct usb_host_endpoint *ep)
 942 {
 943         struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
 944         struct usbhsh_device *udev;
 945         struct usbhsh_hpriv *hpriv;
 946
 947         /*
 948          * this function might be called manytimes by same hcd/ep
 949          * in-endpoint == out-endpoint if ep == dcp.
 950          */
 951         if (!uep)
 952                 return;
 953
 954         udev    = usbhsh_uep_to_udev(uep);
 955         hpriv   = usbhsh_hcd_to_hpriv(hcd);
 956
 957         usbhsh_endpoint_detach(hpriv, ep);
 958
 959         /*
 960          * if there is no endpoint,
 961          * free device
 962          */
 963         if (!usbhsh_device_has_endpoint(udev))
 964                 usbhsh_device_detach(hpriv, udev);
 965 }
 966
 967 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
 968 {
 969         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 970         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 971         struct device *dev = usbhs_priv_to_dev(priv);
 972         int roothub_id = 1; /* only 1 root hub */
 973
 974         /*
 975          * does port stat was changed ?
 976          * check USB_PORT_STAT_C_xxx << 16
 977          */
 978         if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
 979                 *buf = (1 << roothub_id);
 980         else
 981                 *buf = 0;
 982
 983         dev_dbg(dev, "%s (%02x)\n", __func__, *buf);
 984
 985         return !!(*buf);
 986 }
 987
 988 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
 989                                     u16 typeReq, u16 wValue,
 990                                     u16 wIndex, char *buf, u16 wLength)
 991 {
 992         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 993         struct device *dev = usbhs_priv_to_dev(priv);
 994
 995         switch (wValue) {
 996         case C_HUB_OVER_CURRENT:
 997         case C_HUB_LOCAL_POWER:
 998                 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
 999                 return 0;
1000         }
1001
1002         return -EPIPE;
1003 }
1004
1005 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1006                                      u16 typeReq, u16 wValue,
1007                                      u16 wIndex, char *buf, u16 wLength)
1008 {
1009         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1010         struct device *dev = usbhs_priv_to_dev(priv);
1011         int enable = (typeReq == SetPortFeature);
1012         int speed, i, timeout = 128;
1013         int roothub_id = 1; /* only 1 root hub */
1014
1015         /* common error */
1016         if (wIndex > roothub_id || wLength != 0)
1017                 return -EPIPE;
1018
1019         /* check wValue */
1020         switch (wValue) {
1021         case USB_PORT_FEAT_POWER:
1022                 usbhs_vbus_ctrl(priv, enable);
1023                 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1024                 break;
1025
1026         case USB_PORT_FEAT_ENABLE:
1027         case USB_PORT_FEAT_SUSPEND:
1028         case USB_PORT_FEAT_C_ENABLE:
1029         case USB_PORT_FEAT_C_SUSPEND:
1030         case USB_PORT_FEAT_C_CONNECTION:
1031         case USB_PORT_FEAT_C_OVER_CURRENT:
1032         case USB_PORT_FEAT_C_RESET:
1033                 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1034                 break;
1035
1036         case USB_PORT_FEAT_RESET:
1037                 if (!enable)
1038                         break;
1039
1040                 usbhsh_port_stat_clear(hpriv,
1041                                        USB_PORT_STAT_HIGH_SPEED |
1042                                        USB_PORT_STAT_LOW_SPEED);
1043
1044                 usbhs_bus_send_reset(priv);
1045                 msleep(20);
1046                 usbhs_bus_send_sof_enable(priv);
1047
1048                 for (i = 0; i < timeout ; i++) {
1049                         switch (usbhs_bus_get_speed(priv)) {
1050                         case USB_SPEED_LOW:
1051                                 speed = USB_PORT_STAT_LOW_SPEED;
1052                                 goto got_usb_bus_speed;
1053                         case USB_SPEED_HIGH:
1054                                 speed = USB_PORT_STAT_HIGH_SPEED;
1055                                 goto got_usb_bus_speed;
1056                         case USB_SPEED_FULL:
1057                                 speed = 0;
1058                                 goto got_usb_bus_speed;
1059                         }
1060
1061                         msleep(20);
1062                 }
1063                 return -EPIPE;
1064
1065 got_usb_bus_speed:
1066                 usbhsh_port_stat_set(hpriv, speed);
1067                 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1068
1069                 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1070                         __func__, speed);
1071
1072                 /* status change is not needed */
1073                 return 0;
1074
1075         default:
1076                 return -EPIPE;
1077         }
1078
1079         /* set/clear status */
1080         if (enable)
1081                 usbhsh_port_stat_set(hpriv, (1 << wValue));
1082         else
1083                 usbhsh_port_stat_clear(hpriv, (1 << wValue));
1084
1085         return 0;
1086 }
1087
1088 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1089                                    u16 typeReq, u16 wValue,
1090                                    u16 wIndex, char *buf, u16 wLength)
1091 {
1092         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1093         struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1094         struct device *dev = usbhs_priv_to_dev(priv);
1095         int roothub_id = 1; /* only 1 root hub */
1096
1097         switch (typeReq) {
1098         case GetHubStatus:
1099                 dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1100
1101                 *buf = 0x00;
1102                 break;
1103
1104         case GetPortStatus:
1105                 if (wIndex != roothub_id)
1106                         return -EPIPE;
1107
1108                 dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1109                 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1110                 break;
1111
1112         case GetHubDescriptor:
1113                 desc->bDescriptorType           = 0x29;
1114                 desc->bHubContrCurrent          = 0;
1115                 desc->bNbrPorts                 = roothub_id;
1116                 desc->bDescLength               = 9;
1117                 desc->bPwrOn2PwrGood            = 0;
1118                 desc->wHubCharacteristics       = cpu_to_le16(0x0011);
1119                 desc->u.hs.DeviceRemovable[0]   = (roothub_id << 1);
1120                 desc->u.hs.DeviceRemovable[1]   = ~0;
1121                 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1122                 break;
1123         }
1124
1125         return 0;
1126 }
1127
1128 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1129                               u16 wIndex, char *buf, u16 wLength)
1130 {
1131         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1132         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1133         struct device *dev = usbhs_priv_to_dev(priv);
1134         int ret = -EPIPE;
1135
1136         switch (typeReq) {
1137
1138         /* Hub Feature */
1139         case ClearHubFeature:
1140         case SetHubFeature:
1141                 ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1142                                                wValue, wIndex, buf, wLength);
1143                 break;
1144
1145         /* Port Feature */
1146         case SetPortFeature:
1147         case ClearPortFeature:
1148                 ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1149                                                 wValue, wIndex, buf, wLength);
1150                 break;
1151
1152         /* Get status */
1153         case GetHubStatus:
1154         case GetPortStatus:
1155         case GetHubDescriptor:
1156                 ret = __usbhsh_hub_get_status(hpriv, typeReq,
1157                                               wValue, wIndex, buf, wLength);
1158                 break;
1159         }
1160
1161         dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1162                 typeReq, ret, usbhsh_port_stat_get(hpriv));
1163
1164         return ret;
1165 }
1166
1167 static struct hc_driver usbhsh_driver = {
1168         .description =          usbhsh_hcd_name,
1169         .hcd_priv_size =        sizeof(struct usbhsh_hpriv),
1170
1171         /*
1172          * generic hardware linkage
1173          */
1174         .flags =                HCD_USB2,
1175
1176         .start =                usbhsh_host_start,
1177         .stop =                 usbhsh_host_stop,
1178
1179         /*
1180          * managing i/o requests and associated device resources
1181          */
1182         .urb_enqueue =          usbhsh_urb_enqueue,
1183         .urb_dequeue =          usbhsh_urb_dequeue,
1184         .endpoint_disable =     usbhsh_endpoint_disable,
1185
1186         /*
1187          * root hub
1188          */
1189         .hub_status_data =      usbhsh_hub_status_data,
1190         .hub_control =          usbhsh_hub_control,
1191 };
1192
1193 /*
1194  *              interrupt functions
1195  */
1196 static int usbhsh_irq_attch(struct usbhs_priv *priv,
1197                             struct usbhs_irq_state *irq_state)
1198 {
1199         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1200         struct device *dev = usbhs_priv_to_dev(priv);
1201
1202         dev_dbg(dev, "device attached\n");
1203
1204         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1205         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1206
1207         return 0;
1208 }
1209
1210 static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1211                            struct usbhs_irq_state *irq_state)
1212 {
1213         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1214         struct device *dev = usbhs_priv_to_dev(priv);
1215
1216         dev_dbg(dev, "device detached\n");
1217
1218         usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1219         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1220
1221         return 0;
1222 }
1223
1224 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1225                                 struct usbhs_irq_state *irq_state)
1226 {
1227         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1228         struct device *dev = usbhs_priv_to_dev(priv);
1229
1230         dev_dbg(dev, "setup packet OK\n");
1231
1232         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1233
1234         return 0;
1235 }
1236
1237 static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1238                                 struct usbhs_irq_state *irq_state)
1239 {
1240         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1241         struct device *dev = usbhs_priv_to_dev(priv);
1242
1243         dev_dbg(dev, "setup packet Err\n");
1244
1245         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1246
1247         return 0;
1248 }
1249
1250 /*
1251  *              module start/stop
1252  */
1253 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1254 {
1255         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1256         struct usbhs_pipe *pipe;
1257         u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
1258         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1259         int old_type, dir_in, i;
1260
1261         /* init all pipe */
1262         old_type = USB_ENDPOINT_XFER_CONTROL;
1263         for (i = 0; i < pipe_size; i++) {
1264
1265                 /*
1266                  * data "output" will be finished as soon as possible,
1267                  * but there is no guaranty at data "input" case.
1268                  *
1269                  * "input" needs "standby" pipe.
1270                  * So, "input" direction pipe > "output" direction pipe
1271                  * is good idea.
1272                  *
1273                  * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1274                  * and the other will be input direction here.
1275                  *
1276                  * ex)
1277                  * ...
1278                  * USB_ENDPOINT_XFER_ISOC -> dir out
1279                  * USB_ENDPOINT_XFER_ISOC -> dir in
1280                  * USB_ENDPOINT_XFER_BULK -> dir out
1281                  * USB_ENDPOINT_XFER_BULK -> dir in
1282                  * USB_ENDPOINT_XFER_BULK -> dir in
1283                  * ...
1284                  */
1285                 dir_in = (pipe_type[i] == old_type);
1286                 old_type = pipe_type[i];
1287
1288                 if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) {
1289                         pipe = usbhs_dcp_malloc(priv);
1290                         usbhsh_hpriv_to_dcp(hpriv) = pipe;
1291                 } else {
1292                         pipe = usbhs_pipe_malloc(priv,
1293                                                  pipe_type[i],
1294                                                  dir_in);
1295                 }
1296
1297                 pipe->mod_private = NULL;
1298         }
1299 }
1300
1301 static int usbhsh_start(struct usbhs_priv *priv)
1302 {
1303         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1304         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1305         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1306         struct device *dev = usbhs_priv_to_dev(priv);
1307         int ret;
1308
1309         /* add hcd */
1310         ret = usb_add_hcd(hcd, 0, 0);
1311         if (ret < 0)
1312                 return 0;
1313
1314         /*
1315          * pipe initialize and enable DCP
1316          */
1317         usbhs_pipe_init(priv,
1318                         usbhsh_dma_map_ctrl);
1319         usbhs_fifo_init(priv);
1320         usbhsh_pipe_init_for_host(priv);
1321
1322         /*
1323          * system config enble
1324          * - HI speed
1325          * - host
1326          * - usb module
1327          */
1328         usbhs_sys_host_ctrl(priv, 1);
1329
1330         /*
1331          * enable irq callback
1332          */
1333         mod->irq_attch          = usbhsh_irq_attch;
1334         mod->irq_dtch           = usbhsh_irq_dtch;
1335         mod->irq_sack           = usbhsh_irq_setup_ack;
1336         mod->irq_sign           = usbhsh_irq_setup_err;
1337         usbhs_irq_callback_update(priv, mod);
1338
1339         dev_dbg(dev, "start host\n");
1340
1341         return ret;
1342 }
1343
1344 static int usbhsh_stop(struct usbhs_priv *priv)
1345 {
1346         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1347         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1348         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1349         struct device *dev = usbhs_priv_to_dev(priv);
1350
1351         /*
1352          * disable irq callback
1353          */
1354         mod->irq_attch  = NULL;
1355         mod->irq_dtch   = NULL;
1356         mod->irq_sack   = NULL;
1357         mod->irq_sign   = NULL;
1358         usbhs_irq_callback_update(priv, mod);
1359
1360         usb_remove_hcd(hcd);
1361
1362         /* disable sys */
1363         usbhs_sys_host_ctrl(priv, 0);
1364
1365         dev_dbg(dev, "quit host\n");
1366
1367         return 0;
1368 }
1369
1370 int usbhs_mod_host_probe(struct usbhs_priv *priv)
1371 {
1372         struct usbhsh_hpriv *hpriv;
1373         struct usb_hcd *hcd;
1374         struct usbhsh_device *udev;
1375         struct device *dev = usbhs_priv_to_dev(priv);
1376         int i;
1377
1378         /* initialize hcd */
1379         hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1380         if (!hcd) {
1381                 dev_err(dev, "Failed to create hcd\n");
1382                 return -ENOMEM;
1383         }
1384
1385         /*
1386          * CAUTION
1387          *
1388          * There is no guarantee that it is possible to access usb module here.
1389          * Don't accesses to it.
1390          * The accesse will be enable after "usbhsh_start"
1391          */
1392
1393         hpriv = usbhsh_hcd_to_hpriv(hcd);
1394
1395         /*
1396          * register itself
1397          */
1398         usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1399
1400         /* init hpriv */
1401         hpriv->mod.name         = "host";
1402         hpriv->mod.start        = usbhsh_start;
1403         hpriv->mod.stop         = usbhsh_stop;
1404         usbhsh_port_stat_init(hpriv);
1405
1406         /* init all device */
1407         usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1408                 udev->usbv      = NULL;
1409                 INIT_LIST_HEAD(&udev->ep_list_head);
1410         }
1411
1412         dev_info(dev, "host probed\n");
1413
1414         return 0;
1415 }
1416
1417 int usbhs_mod_host_remove(struct usbhs_priv *priv)
1418 {
1419         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1420         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1421
1422         usb_put_hcd(hcd);
1423
1424         return 0;
1425 }