kernel/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         unsigned int            counter; /* pipe attach counter */
  89 };
  90
  91 #define USBHSH_DEVICE_MAX       10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
  92 #define USBHSH_PORT_MAX          7 /* see DEVADDn :: HUBPORT */
  93 struct usbhsh_hpriv {
  94         struct usbhs_mod        mod;
  95         struct usbhs_pipe       *dcp;
  96
  97         struct usbhsh_device    udev[USBHSH_DEVICE_MAX];
  98
  99         u32     port_stat;      /* USB_PORT_STAT_xxx */
 100
 101         struct completion       setup_ack_done;
 102 };
 103
 104
 105 static const char usbhsh_hcd_name[] = "renesas_usbhs host";
 106
 107 /*
 108  *              macro
 109  */
 110 #define usbhsh_priv_to_hpriv(priv) \
 111         container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
 112
 113 #define __usbhsh_for_each_udev(start, pos, h, i)        \
 114         for ((i) = start;                                               \
 115              ((i) < USBHSH_DEVICE_MAX) && ((pos) = (h)->udev + (i));    \
 116              (i)++)
 117
 118 #define usbhsh_for_each_udev(pos, hpriv, i)     \
 119         __usbhsh_for_each_udev(1, pos, hpriv, i)
 120
 121 #define usbhsh_for_each_udev_with_dev0(pos, hpriv, i)   \
 122         __usbhsh_for_each_udev(0, pos, hpriv, i)
 123
 124 #define usbhsh_hcd_to_hpriv(h)  (struct usbhsh_hpriv *)((h)->hcd_priv)
 125 #define usbhsh_hcd_to_dev(h)    ((h)->self.controller)
 126
 127 #define usbhsh_hpriv_to_priv(h) ((h)->mod.priv)
 128 #define usbhsh_hpriv_to_dcp(h)  ((h)->dcp)
 129 #define usbhsh_hpriv_to_hcd(h)  \
 130         container_of((void *)h, struct usb_hcd, hcd_priv)
 131
 132 #define usbhsh_ep_to_uep(u)     ((u)->hcpriv)
 133 #define usbhsh_uep_to_pipe(u)   ((u)->pipe)
 134 #define usbhsh_uep_to_udev(u)   ((u)->udev)
 135 #define usbhsh_uep_to_ep(u)     ((u)->ep)
 136
 137 #define usbhsh_urb_to_ureq(u)   ((u)->hcpriv)
 138 #define usbhsh_urb_to_usbv(u)   ((u)->dev)
 139
 140 #define usbhsh_usbv_to_udev(d)  dev_get_drvdata(&(d)->dev)
 141
 142 #define usbhsh_udev_to_usbv(h)  ((h)->usbv)
 143 #define usbhsh_udev_is_used(h)  usbhsh_udev_to_usbv(h)
 144
 145 #define usbhsh_pipe_to_uep(p)   ((p)->mod_private)
 146
 147 #define usbhsh_device_parent(d)         (usbhsh_usbv_to_udev((d)->usbv->parent))
 148 #define usbhsh_device_hubport(d)        ((d)->usbv->portnum)
 149 #define usbhsh_device_number(h, d)      ((int)((d) - (h)->udev))
 150 #define usbhsh_device_nth(h, d)         ((h)->udev + d)
 151 #define usbhsh_device0(h)               usbhsh_device_nth(h, 0)
 152
 153 #define usbhsh_port_stat_init(h)        ((h)->port_stat = 0)
 154 #define usbhsh_port_stat_set(h, s)      ((h)->port_stat |= (s))
 155 #define usbhsh_port_stat_clear(h, s)    ((h)->port_stat &= ~(s))
 156 #define usbhsh_port_stat_get(h)         ((h)->port_stat)
 157
 158 #define usbhsh_pkt_to_ureq(p)   \
 159         container_of((void *)p, struct usbhsh_request, pkt)
 160
 161 /*
 162  *              req alloc/free
 163  */
 164 static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv,
 165                                                struct urb *urb,
 166                                                gfp_t mem_flags)
 167 {
 168         struct usbhsh_request *ureq;
 169         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 170         struct device *dev = usbhs_priv_to_dev(priv);
 171
 172         ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
 173         if (!ureq) {
 174                 dev_err(dev, "ureq alloc fail\n");
 175                 return NULL;
 176         }
 177
 178         usbhs_pkt_init(&ureq->pkt);
 179         ureq->urb = urb;
 180         usbhsh_urb_to_ureq(urb) = ureq;
 181
 182         return ureq;
 183 }
 184
 185 static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
 186                             struct usbhsh_request *ureq)
 187 {
 188         usbhsh_urb_to_ureq(ureq->urb) = NULL;
 189         ureq->urb = NULL;
 190
 191         kfree(ureq);
 192 }
 193
 194 /*
 195  *              status
 196  */
 197 static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
 198 {
 199         /*
 200          * we can decide some device is attached or not
 201          * by checking mod.irq_attch
 202          * see
 203          *      usbhsh_irq_attch()
 204          *      usbhsh_irq_dtch()
 205          */
 206         return (hpriv->mod.irq_attch == NULL);
 207 }
 208
 209 /*
 210  *              pipe control
 211  */
 212 static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv,
 213                                           struct urb *urb,
 214                                           struct usbhs_pkt *pkt)
 215 {
 216         int len = urb->actual_length;
 217         int maxp = usb_endpoint_maxp(&urb->ep->desc);
 218         int t = 0;
 219
 220         /* DCP is out of sequence control */
 221         if (usb_pipecontrol(urb->pipe))
 222                 return;
 223
 224         /*
 225          * renesas_usbhs pipe has a limitation in a number.
 226          * So, driver should re-use the limited pipe for each device/endpoint.
 227          * DATA0/1 sequence should be saved for it.
 228          * see [image of mod_host]
 229          *     [HARDWARE LIMITATION]
 230          */
 231
 232         /*
 233          * next sequence depends on actual_length
 234          *
 235          * ex) actual_length = 1147, maxp = 512
 236          * data0 : 512
 237          * data1 : 512
 238          * data0 : 123
 239          * data1 is the next sequence
 240          */
 241         t = len / maxp;
 242         if (len % maxp)
 243                 t++;
 244         if (pkt->zero)
 245                 t++;
 246         t %= 2;
 247
 248         if (t)
 249                 usb_dotoggle(urb->dev,
 250                              usb_pipeendpoint(urb->pipe),
 251                              usb_pipeout(urb->pipe));
 252 }
 253
 254 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
 255                                                struct urb *urb);
 256
 257 static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
 258                               struct urb *urb)
 259 {
 260         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 261         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 262         struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
 263         struct usbhs_pipe *pipe;
 264         struct usb_endpoint_descriptor *desc = &urb->ep->desc;
 265         struct device *dev = usbhs_priv_to_dev(priv);
 266         unsigned long flags;
 267         int dir_in_req = !!usb_pipein(urb->pipe);
 268         int is_dcp = usb_endpoint_xfer_control(desc);
 269         int i, dir_in;
 270         int ret = -EBUSY;
 271
 272         /********************  spin lock ********************/
 273         usbhs_lock(priv, flags);
 274
 275         /*
 276          * if uep has been attached to pipe,
 277          * reuse it
 278          */
 279         if (usbhsh_uep_to_pipe(uep)) {
 280                 ret = 0;
 281                 goto usbhsh_pipe_attach_done;
 282         }
 283
 284         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 285
 286                 /* check pipe type */
 287                 if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
 288                         continue;
 289
 290                 /* check pipe direction if normal pipe */
 291                 if (!is_dcp) {
 292                         dir_in = !!usbhs_pipe_is_dir_in(pipe);
 293                         if (0 != (dir_in - dir_in_req))
 294                                 continue;
 295                 }
 296
 297                 /* check pipe is free */
 298                 if (usbhsh_pipe_to_uep(pipe))
 299                         continue;
 300
 301                 /*
 302                  * attach pipe to uep
 303                  *
 304                  * usbhs_pipe_config_update() should be called after
 305                  * usbhs_set_device_config()
 306                  * see
 307                  *  DCPMAXP/PIPEMAXP
 308                  */
 309                 usbhsh_uep_to_pipe(uep)         = pipe;
 310                 usbhsh_pipe_to_uep(pipe)        = uep;
 311
 312                 usbhs_pipe_config_update(pipe,
 313                                          usbhsh_device_number(hpriv, udev),
 314                                          usb_endpoint_num(desc),
 315                                          usb_endpoint_maxp(desc));
 316
 317                 dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
 318                         usbhsh_device_number(hpriv, udev),
 319                         usb_endpoint_num(desc),
 320                         usbhs_pipe_name(pipe),
 321                         dir_in_req ? "in" : "out");
 322
 323                 ret = 0;
 324                 break;
 325         }
 326
 327 usbhsh_pipe_attach_done:
 328         if (0 == ret)
 329                 uep->counter++;
 330
 331         usbhs_unlock(priv, flags);
 332         /********************  spin unlock ******************/
 333
 334         return ret;
 335 }
 336
 337 static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
 338                                struct usbhsh_ep *uep)
 339 {
 340         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 341         struct usbhs_pipe *pipe;
 342         struct device *dev = usbhs_priv_to_dev(priv);
 343         unsigned long flags;
 344
 345         if (unlikely(!uep)) {
 346                 dev_err(dev, "no uep\n");
 347                 return;
 348         }
 349
 350         /********************  spin lock ********************/
 351         usbhs_lock(priv, flags);
 352
 353         pipe = usbhsh_uep_to_pipe(uep);
 354
 355         if (unlikely(!pipe)) {
 356                 dev_err(dev, "uep doens't have pipe\n");
 357         } else if (1 == uep->counter--) { /* last user */
 358                 struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
 359                 struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
 360
 361                 /* detach pipe from uep */
 362                 usbhsh_uep_to_pipe(uep)         = NULL;
 363                 usbhsh_pipe_to_uep(pipe)        = NULL;
 364
 365                 dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
 366                         usbhsh_device_number(hpriv, udev),
 367                         usb_endpoint_num(&ep->desc),
 368                         usbhs_pipe_name(pipe));
 369         }
 370
 371         usbhs_unlock(priv, flags);
 372         /********************  spin unlock ******************/
 373 }
 374
 375 /*
 376  *              endpoint control
 377  */
 378 static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
 379                                   struct urb *urb,
 380                                   gfp_t mem_flags)
 381 {
 382         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 383         struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
 384         struct usb_host_endpoint *ep = urb->ep;
 385         struct usbhsh_ep *uep;
 386         struct device *dev = usbhs_priv_to_dev(priv);
 387         struct usb_endpoint_descriptor *desc = &ep->desc;
 388         unsigned long flags;
 389
 390         uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
 391         if (!uep) {
 392                 dev_err(dev, "usbhsh_ep alloc fail\n");
 393                 return -ENOMEM;
 394         }
 395
 396         /********************  spin lock ********************/
 397         usbhs_lock(priv, flags);
 398
 399         /*
 400          * init endpoint
 401          */
 402         uep->counter = 0;
 403         INIT_LIST_HEAD(&uep->ep_list);
 404         list_add_tail(&uep->ep_list, &udev->ep_list_head);
 405
 406         usbhsh_uep_to_udev(uep) = udev;
 407         usbhsh_uep_to_ep(uep)   = ep;
 408         usbhsh_ep_to_uep(ep)    = uep;
 409
 410         usbhs_unlock(priv, flags);
 411         /********************  spin unlock ******************/
 412
 413         dev_dbg(dev, "%s [%d-%d]\n", __func__,
 414                 usbhsh_device_number(hpriv, udev),
 415                 usb_endpoint_num(desc));
 416
 417         return 0;
 418 }
 419
 420 static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
 421                                    struct usb_host_endpoint *ep)
 422 {
 423         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 424         struct device *dev = usbhs_priv_to_dev(priv);
 425         struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
 426         unsigned long flags;
 427
 428         if (!uep)
 429                 return;
 430
 431         dev_dbg(dev, "%s [%d-%d]\n", __func__,
 432                 usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
 433                 usb_endpoint_num(&ep->desc));
 434
 435         if (usbhsh_uep_to_pipe(uep))
 436                 usbhsh_pipe_detach(hpriv, uep);
 437
 438         /********************  spin lock ********************/
 439         usbhs_lock(priv, flags);
 440
 441         /* remove this endpoint from udev */
 442         list_del_init(&uep->ep_list);
 443
 444         usbhsh_uep_to_udev(uep) = NULL;
 445         usbhsh_uep_to_ep(uep)   = NULL;
 446         usbhsh_ep_to_uep(ep)    = NULL;
 447
 448         usbhs_unlock(priv, flags);
 449         /********************  spin unlock ******************/
 450
 451         kfree(uep);
 452 }
 453
 454 static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
 455                                        struct usbhsh_device *udev)
 456 {
 457         struct usbhsh_ep *uep, *next;
 458
 459         list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
 460                 usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
 461 }
 462
 463 /*
 464  *              device control
 465  */
 466 static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
 467                                      struct usbhsh_device *udev)
 468 {
 469         struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
 470
 471         return hcd->self.root_hub == usbv->parent;
 472 }
 473
 474 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
 475 {
 476         return !list_empty(&udev->ep_list_head);
 477 }
 478
 479 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
 480                                                struct urb *urb)
 481 {
 482         struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 483         struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 484
 485         /* usbhsh_device_attach() is still not called */
 486         if (!udev)
 487                 return NULL;
 488
 489         /* if it is device0, return it */
 490         if (0 == usb_pipedevice(urb->pipe))
 491                 return usbhsh_device0(hpriv);
 492
 493         /* return attached device */
 494         return udev;
 495 }
 496
 497 static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
 498                                                  struct urb *urb)
 499 {
 500         struct usbhsh_device *udev = NULL;
 501         struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
 502         struct usbhsh_device *pos;
 503         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 504         struct device *dev = usbhsh_hcd_to_dev(hcd);
 505         struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 506         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 507         unsigned long flags;
 508         u16 upphub, hubport;
 509         int i;
 510
 511         /*
 512          * This function should be called only while urb is pointing to device0.
 513          * It will attach unused usbhsh_device to urb (usbv),
 514          * and initialize device0.
 515          * You can use usbhsh_device_get() to get "current" udev,
 516          * and usbhsh_usbv_to_udev() is for "attached" udev.
 517          */
 518         if (0 != usb_pipedevice(urb->pipe)) {
 519                 dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
 520                 return NULL;
 521         }
 522
 523         /********************  spin lock ********************/
 524         usbhs_lock(priv, flags);
 525
 526         /*
 527          * find unused device
 528          */
 529         usbhsh_for_each_udev(pos, hpriv, i) {
 530                 if (usbhsh_udev_is_used(pos))
 531                         continue;
 532                 udev = pos;
 533                 break;
 534         }
 535
 536         if (udev) {
 537                 /*
 538                  * usbhsh_usbv_to_udev()
 539                  * usbhsh_udev_to_usbv()
 540                  * will be enable
 541                  */
 542                 dev_set_drvdata(&usbv->dev, udev);
 543                 udev->usbv = usbv;
 544         }
 545
 546         usbhs_unlock(priv, flags);
 547         /********************  spin unlock ******************/
 548
 549         if (!udev) {
 550                 dev_err(dev, "no free usbhsh_device\n");
 551                 return NULL;
 552         }
 553
 554         if (usbhsh_device_has_endpoint(udev)) {
 555                 dev_warn(dev, "udev have old endpoint\n");
 556                 usbhsh_endpoint_detach_all(hpriv, udev);
 557         }
 558
 559         if (usbhsh_device_has_endpoint(udev0)) {
 560                 dev_warn(dev, "udev0 have old endpoint\n");
 561                 usbhsh_endpoint_detach_all(hpriv, udev0);
 562         }
 563
 564         /* uep will be attached */
 565         INIT_LIST_HEAD(&udev0->ep_list_head);
 566         INIT_LIST_HEAD(&udev->ep_list_head);
 567
 568         /*
 569          * set device0 config
 570          */
 571         usbhs_set_device_config(priv,
 572                                 0, 0, 0, usbv->speed);
 573
 574         /*
 575          * set new device config
 576          */
 577         upphub  = 0;
 578         hubport = 0;
 579         if (!usbhsh_connected_to_rhdev(hcd, udev)) {
 580                 /* if udev is not connected to rhdev, it means parent is Hub */
 581                 struct usbhsh_device *parent = usbhsh_device_parent(udev);
 582
 583                 upphub  = usbhsh_device_number(hpriv, parent);
 584                 hubport = usbhsh_device_hubport(udev);
 585
 586                 dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__,
 587                         upphub, hubport, parent);
 588         }
 589
 590         usbhs_set_device_config(priv,
 591                                usbhsh_device_number(hpriv, udev),
 592                                upphub, hubport, usbv->speed);
 593
 594         dev_dbg(dev, "%s [%d](%p)\n", __func__,
 595                 usbhsh_device_number(hpriv, udev), udev);
 596
 597         return udev;
 598 }
 599
 600 static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
 601                                struct usbhsh_device *udev)
 602 {
 603         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 604         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 605         struct device *dev = usbhsh_hcd_to_dev(hcd);
 606         struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
 607         unsigned long flags;
 608
 609         dev_dbg(dev, "%s [%d](%p)\n", __func__,
 610                 usbhsh_device_number(hpriv, udev), udev);
 611
 612         if (usbhsh_device_has_endpoint(udev)) {
 613                 dev_warn(dev, "udev still have endpoint\n");
 614                 usbhsh_endpoint_detach_all(hpriv, udev);
 615         }
 616
 617         /*
 618          * There is nothing to do if it is device0.
 619          * see
 620          *  usbhsh_device_attach()
 621          *  usbhsh_device_get()
 622          */
 623         if (0 == usbhsh_device_number(hpriv, udev))
 624                 return;
 625
 626         /********************  spin lock ********************/
 627         usbhs_lock(priv, flags);
 628
 629         /*
 630          * usbhsh_usbv_to_udev()
 631          * usbhsh_udev_to_usbv()
 632          * will be disable
 633          */
 634         dev_set_drvdata(&usbv->dev, NULL);
 635         udev->usbv = NULL;
 636
 637         usbhs_unlock(priv, flags);
 638         /********************  spin unlock ******************/
 639 }
 640
 641 /*
 642  *              queue push/pop
 643  */
 644 static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
 645 {
 646         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 647         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 648         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 649         struct urb *urb = ureq->urb;
 650         struct device *dev = usbhs_priv_to_dev(priv);
 651         int status = 0;
 652
 653         dev_dbg(dev, "%s\n", __func__);
 654
 655         if (!urb) {
 656                 dev_warn(dev, "pkt doesn't have urb\n");
 657                 return;
 658         }
 659
 660         if (!usbhsh_is_running(hpriv))
 661                 status = -ESHUTDOWN;
 662
 663         urb->actual_length = pkt->actual;
 664
 665         usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
 666         usbhsh_ureq_free(hpriv, ureq);
 667
 668         usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep));
 669
 670         usb_hcd_unlink_urb_from_ep(hcd, urb);
 671         usb_hcd_giveback_urb(hcd, urb, status);
 672 }
 673
 674 static int usbhsh_queue_push(struct usb_hcd *hcd,
 675                              struct urb *urb,
 676                              gfp_t mem_flags)
 677 {
 678         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 679         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 680         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 681         struct device *dev = usbhsh_hcd_to_dev(hcd);
 682         struct usbhsh_request *ureq;
 683         void *buf;
 684         int len, sequence;
 685
 686         if (usb_pipeisoc(urb->pipe)) {
 687                 dev_err(dev, "pipe iso is not supported now\n");
 688                 return -EIO;
 689         }
 690
 691         /* this ureq will be freed on usbhsh_queue_done() */
 692         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 693         if (unlikely(!ureq)) {
 694                 dev_err(dev, "ureq alloc fail\n");
 695                 return -ENOMEM;
 696         }
 697
 698         if (usb_pipein(urb->pipe))
 699                 pipe->handler = &usbhs_fifo_dma_pop_handler;
 700         else
 701                 pipe->handler = &usbhs_fifo_dma_push_handler;
 702
 703         buf = (void *)(urb->transfer_buffer + urb->actual_length);
 704         len = urb->transfer_buffer_length - urb->actual_length;
 705
 706         sequence = usb_gettoggle(urb->dev,
 707                                  usb_pipeendpoint(urb->pipe),
 708                                  usb_pipeout(urb->pipe));
 709
 710         dev_dbg(dev, "%s\n", __func__);
 711         usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
 712                        buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
 713                        sequence);
 714
 715         usbhs_pkt_start(pipe);
 716
 717         return 0;
 718 }
 719
 720 static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
 721                                    struct usbhs_pipe *pipe)
 722 {
 723         struct usbhs_pkt *pkt;
 724
 725         while (1) {
 726                 pkt = usbhs_pkt_pop(pipe, NULL);
 727                 if (!pkt)
 728                         break;
 729
 730                 /*
 731                  * if all packet are gone, usbhsh_endpoint_disable()
 732                  * will be called.
 733                  * then, attached device/endpoint/pipe will be detached
 734                  */
 735                 usbhsh_queue_done(priv, pkt);
 736         }
 737 }
 738
 739 static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
 740 {
 741         struct usbhs_pipe *pos;
 742         int i;
 743
 744         usbhs_for_each_pipe_with_dcp(pos, priv, i)
 745                 usbhsh_queue_force_pop(priv, pos);
 746 }
 747
 748 /*
 749  *              DCP setup stage
 750  */
 751 static int usbhsh_is_request_address(struct urb *urb)
 752 {
 753         struct usb_ctrlrequest *req;
 754
 755         req = (struct usb_ctrlrequest *)urb->setup_packet;
 756
 757         if ((DeviceOutRequest    == req->bRequestType << 8) &&
 758             (USB_REQ_SET_ADDRESS == req->bRequest))
 759                 return 1;
 760         else
 761                 return 0;
 762 }
 763
 764 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
 765                                            struct urb *urb,
 766                                            struct usbhs_pipe *pipe)
 767 {
 768         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 769         struct usb_ctrlrequest req;
 770         struct device *dev = usbhs_priv_to_dev(priv);
 771
 772         /*
 773          * wait setup packet ACK
 774          * see
 775          *      usbhsh_irq_setup_ack()
 776          *      usbhsh_irq_setup_err()
 777          */
 778         init_completion(&hpriv->setup_ack_done);
 779
 780         /* copy original request */
 781         memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
 782
 783         /*
 784          * renesas_usbhs can not use original usb address.
 785          * see HARDWARE LIMITATION.
 786          * modify usb address here to use attached device.
 787          * see usbhsh_device_attach()
 788          */
 789         if (usbhsh_is_request_address(urb)) {
 790                 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 791                 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 792
 793                 /* udev is a attached device */
 794                 req.wValue = usbhsh_device_number(hpriv, udev);
 795                 dev_dbg(dev, "create new address - %d\n", req.wValue);
 796         }
 797
 798         /* set request */
 799         usbhs_usbreq_set_val(priv, &req);
 800
 801         /*
 802          * wait setup packet ACK
 803          */
 804         wait_for_completion(&hpriv->setup_ack_done);
 805
 806         dev_dbg(dev, "%s done\n", __func__);
 807 }
 808
 809 /*
 810  *              DCP data stage
 811  */
 812 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
 813                                           struct usbhs_pkt *pkt)
 814 {
 815         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 816         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 817
 818         /* this ureq was connected to urb when usbhsh_urb_enqueue()  */
 819
 820         usbhsh_ureq_free(hpriv, ureq);
 821 }
 822
 823 static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
 824                                          struct urb *urb,
 825                                          struct usbhs_pipe *pipe,
 826                                          gfp_t mem_flags)
 827
 828 {
 829         struct usbhsh_request *ureq;
 830
 831         /* this ureq will be freed on usbhsh_data_stage_packet_done() */
 832         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 833         if (unlikely(!ureq))
 834                 return -ENOMEM;
 835
 836         if (usb_pipein(urb->pipe))
 837                 pipe->handler = &usbhs_dcp_data_stage_in_handler;
 838         else
 839                 pipe->handler = &usbhs_dcp_data_stage_out_handler;
 840
 841         usbhs_pkt_push(pipe, &ureq->pkt,
 842                        usbhsh_data_stage_packet_done,
 843                        urb->transfer_buffer,
 844                        urb->transfer_buffer_length,
 845                        (urb->transfer_flags & URB_ZERO_PACKET),
 846                        -1);
 847
 848         return 0;
 849 }
 850
 851 /*
 852  *              DCP status stage
 853  */
 854 static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
 855                                             struct urb *urb,
 856                                             struct usbhs_pipe *pipe,
 857                                             gfp_t mem_flags)
 858 {
 859         struct usbhsh_request *ureq;
 860
 861         /* This ureq will be freed on usbhsh_queue_done() */
 862         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 863         if (unlikely(!ureq))
 864                 return -ENOMEM;
 865
 866         if (usb_pipein(urb->pipe))
 867                 pipe->handler = &usbhs_dcp_status_stage_in_handler;
 868         else
 869                 pipe->handler = &usbhs_dcp_status_stage_out_handler;
 870
 871         usbhs_pkt_push(pipe, &ureq->pkt,
 872                        usbhsh_queue_done,
 873                        NULL,
 874                        urb->transfer_buffer_length,
 875                        0, -1);
 876
 877         return 0;
 878 }
 879
 880 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
 881                                  struct urb *urb,
 882                                  gfp_t mflags)
 883 {
 884         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 885         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 886         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 887         struct device *dev = usbhsh_hcd_to_dev(hcd);
 888         int ret;
 889
 890         dev_dbg(dev, "%s\n", __func__);
 891
 892         /*
 893          * setup stage
 894          *
 895          * usbhsh_send_setup_stage_packet() wait SACK/SIGN
 896          */
 897         usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
 898
 899         /*
 900          * data stage
 901          *
 902          * It is pushed only when urb has buffer.
 903          */
 904         if (urb->transfer_buffer_length) {
 905                 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
 906                 if (ret < 0) {
 907                         dev_err(dev, "data stage failed\n");
 908                         return ret;
 909                 }
 910         }
 911
 912         /*
 913          * status stage
 914          */
 915         ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
 916         if (ret < 0) {
 917                 dev_err(dev, "status stage failed\n");
 918                 return ret;
 919         }
 920
 921         /*
 922          * start pushed packets
 923          */
 924         usbhs_pkt_start(pipe);
 925
 926         return 0;
 927 }
 928
 929 /*
 930  *              dma map functions
 931  */
 932 static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
 933 {
 934         if (map) {
 935                 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 936                 struct urb *urb = ureq->urb;
 937
 938                 /* it can not use scatter/gather */
 939                 if (urb->num_sgs)
 940                         return -EINVAL;
 941
 942                 pkt->dma = urb->transfer_dma;
 943                 if (!pkt->dma)
 944                         return -EINVAL;
 945         }
 946
 947         return 0;
 948 }
 949
 950 /*
 951  *              for hc_driver
 952  */
 953 static int usbhsh_host_start(struct usb_hcd *hcd)
 954 {
 955         return 0;
 956 }
 957
 958 static void usbhsh_host_stop(struct usb_hcd *hcd)
 959 {
 960 }
 961
 962 static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
 963                               struct urb *urb,
 964                               gfp_t mem_flags)
 965 {
 966         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 967         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 968         struct device *dev = usbhs_priv_to_dev(priv);
 969         struct usb_host_endpoint *ep = urb->ep;
 970         struct usbhsh_device *new_udev = NULL;
 971         int is_dir_in = usb_pipein(urb->pipe);
 972         int ret;
 973
 974         dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
 975
 976         if (!usbhsh_is_running(hpriv)) {
 977                 ret = -EIO;
 978                 dev_err(dev, "host is not running\n");
 979                 goto usbhsh_urb_enqueue_error_not_linked;
 980         }
 981
 982         ret = usb_hcd_link_urb_to_ep(hcd, urb);
 983         if (ret) {
 984                 dev_err(dev, "urb link failed\n");
 985                 goto usbhsh_urb_enqueue_error_not_linked;
 986         }
 987
 988         /*
 989          * attach udev if needed
 990          * see [image of mod_host]
 991          */
 992         if (!usbhsh_device_get(hpriv, urb)) {
 993                 new_udev = usbhsh_device_attach(hpriv, urb);
 994                 if (!new_udev) {
 995                         ret = -EIO;
 996                         dev_err(dev, "device attach failed\n");
 997                         goto usbhsh_urb_enqueue_error_not_linked;
 998                 }
 999         }
1000
1001         /*
1002          * attach endpoint if needed
1003          * see [image of mod_host]
1004          */
1005         if (!usbhsh_ep_to_uep(ep)) {
1006                 ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
1007                 if (ret < 0) {
1008                         dev_err(dev, "endpoint attach failed\n");
1009                         goto usbhsh_urb_enqueue_error_free_device;
1010                 }
1011         }
1012
1013         /*
1014          * attach pipe to endpoint
1015          * see [image of mod_host]
1016          */
1017         ret = usbhsh_pipe_attach(hpriv, urb);
1018         if (ret < 0) {
1019                 dev_err(dev, "pipe attach failed\n");
1020                 goto usbhsh_urb_enqueue_error_free_endpoint;
1021         }
1022
1023         /*
1024          * push packet
1025          */
1026         if (usb_pipecontrol(urb->pipe))
1027                 ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1028         else
1029                 ret = usbhsh_queue_push(hcd, urb, mem_flags);
1030
1031         return ret;
1032
1033 usbhsh_urb_enqueue_error_free_endpoint:
1034         usbhsh_endpoint_detach(hpriv, ep);
1035 usbhsh_urb_enqueue_error_free_device:
1036         if (new_udev)
1037                 usbhsh_device_detach(hpriv, new_udev);
1038 usbhsh_urb_enqueue_error_not_linked:
1039
1040         dev_dbg(dev, "%s error\n", __func__);
1041
1042         return ret;
1043 }
1044
1045 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1046 {
1047         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1048         struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1049
1050         if (ureq) {
1051                 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1052                 struct usbhs_pkt *pkt = &ureq->pkt;
1053
1054                 usbhs_pkt_pop(pkt->pipe, pkt);
1055                 usbhsh_queue_done(priv, pkt);
1056         }
1057
1058         return 0;
1059 }
1060
1061 static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1062                                     struct usb_host_endpoint *ep)
1063 {
1064         struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1065         struct usbhsh_device *udev;
1066         struct usbhsh_hpriv *hpriv;
1067
1068         /*
1069          * this function might be called manytimes by same hcd/ep
1070          * in-endpoint == out-endpoint if ep == dcp.
1071          */
1072         if (!uep)
1073                 return;
1074
1075         udev    = usbhsh_uep_to_udev(uep);
1076         hpriv   = usbhsh_hcd_to_hpriv(hcd);
1077
1078         usbhsh_endpoint_detach(hpriv, ep);
1079
1080         /*
1081          * if there is no endpoint,
1082          * free device
1083          */
1084         if (!usbhsh_device_has_endpoint(udev))
1085                 usbhsh_device_detach(hpriv, udev);
1086 }
1087
1088 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1089 {
1090         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1091         int roothub_id = 1; /* only 1 root hub */
1092
1093         /*
1094          * does port stat was changed ?
1095          * check USB_PORT_STAT_C_xxx << 16
1096          */
1097         if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
1098                 *buf = (1 << roothub_id);
1099         else
1100                 *buf = 0;
1101
1102         return !!(*buf);
1103 }
1104
1105 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1106                                     u16 typeReq, u16 wValue,
1107                                     u16 wIndex, char *buf, u16 wLength)
1108 {
1109         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1110         struct device *dev = usbhs_priv_to_dev(priv);
1111
1112         switch (wValue) {
1113         case C_HUB_OVER_CURRENT:
1114         case C_HUB_LOCAL_POWER:
1115                 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1116                 return 0;
1117         }
1118
1119         return -EPIPE;
1120 }
1121
1122 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1123                                      u16 typeReq, u16 wValue,
1124                                      u16 wIndex, char *buf, u16 wLength)
1125 {
1126         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1127         struct device *dev = usbhs_priv_to_dev(priv);
1128         int enable = (typeReq == SetPortFeature);
1129         int speed, i, timeout = 128;
1130         int roothub_id = 1; /* only 1 root hub */
1131
1132         /* common error */
1133         if (wIndex > roothub_id || wLength != 0)
1134                 return -EPIPE;
1135
1136         /* check wValue */
1137         switch (wValue) {
1138         case USB_PORT_FEAT_POWER:
1139                 usbhs_vbus_ctrl(priv, enable);
1140                 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1141                 break;
1142
1143         case USB_PORT_FEAT_ENABLE:
1144         case USB_PORT_FEAT_SUSPEND:
1145         case USB_PORT_FEAT_C_ENABLE:
1146         case USB_PORT_FEAT_C_SUSPEND:
1147         case USB_PORT_FEAT_C_CONNECTION:
1148         case USB_PORT_FEAT_C_OVER_CURRENT:
1149         case USB_PORT_FEAT_C_RESET:
1150                 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1151                 break;
1152
1153         case USB_PORT_FEAT_RESET:
1154                 if (!enable)
1155                         break;
1156
1157                 usbhsh_port_stat_clear(hpriv,
1158                                        USB_PORT_STAT_HIGH_SPEED |
1159                                        USB_PORT_STAT_LOW_SPEED);
1160
1161                 usbhsh_queue_force_pop_all(priv);
1162
1163                 usbhs_bus_send_reset(priv);
1164                 msleep(20);
1165                 usbhs_bus_send_sof_enable(priv);
1166
1167                 for (i = 0; i < timeout ; i++) {
1168                         switch (usbhs_bus_get_speed(priv)) {
1169                         case USB_SPEED_LOW:
1170                                 speed = USB_PORT_STAT_LOW_SPEED;
1171                                 goto got_usb_bus_speed;
1172                         case USB_SPEED_HIGH:
1173                                 speed = USB_PORT_STAT_HIGH_SPEED;
1174                                 goto got_usb_bus_speed;
1175                         case USB_SPEED_FULL:
1176                                 speed = 0;
1177                                 goto got_usb_bus_speed;
1178                         }
1179
1180                         msleep(20);
1181                 }
1182                 return -EPIPE;
1183
1184 got_usb_bus_speed:
1185                 usbhsh_port_stat_set(hpriv, speed);
1186                 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1187
1188                 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1189                         __func__, speed);
1190
1191                 /* status change is not needed */
1192                 return 0;
1193
1194         default:
1195                 return -EPIPE;
1196         }
1197
1198         /* set/clear status */
1199         if (enable)
1200                 usbhsh_port_stat_set(hpriv, (1 << wValue));
1201         else
1202                 usbhsh_port_stat_clear(hpriv, (1 << wValue));
1203
1204         return 0;
1205 }
1206
1207 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1208                                    u16 typeReq, u16 wValue,
1209                                    u16 wIndex, char *buf, u16 wLength)
1210 {
1211         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1212         struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1213         struct device *dev = usbhs_priv_to_dev(priv);
1214         int roothub_id = 1; /* only 1 root hub */
1215
1216         switch (typeReq) {
1217         case GetHubStatus:
1218                 dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1219
1220                 *buf = 0x00;
1221                 break;
1222
1223         case GetPortStatus:
1224                 if (wIndex != roothub_id)
1225                         return -EPIPE;
1226
1227                 dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1228                 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1229                 break;
1230
1231         case GetHubDescriptor:
1232                 desc->bDescriptorType           = USB_DT_HUB;
1233                 desc->bHubContrCurrent          = 0;
1234                 desc->bNbrPorts                 = roothub_id;
1235                 desc->bDescLength               = 9;
1236                 desc->bPwrOn2PwrGood            = 0;
1237                 desc->wHubCharacteristics       =
1238                         cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM);
1239                 desc->u.hs.DeviceRemovable[0]   = (roothub_id << 1);
1240                 desc->u.hs.DeviceRemovable[1]   = ~0;
1241                 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1242                 break;
1243         }
1244
1245         return 0;
1246 }
1247
1248 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1249                               u16 wIndex, char *buf, u16 wLength)
1250 {
1251         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1252         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1253         struct device *dev = usbhs_priv_to_dev(priv);
1254         int ret = -EPIPE;
1255
1256         switch (typeReq) {
1257
1258         /* Hub Feature */
1259         case ClearHubFeature:
1260         case SetHubFeature:
1261                 ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1262                                                wValue, wIndex, buf, wLength);
1263                 break;
1264
1265         /* Port Feature */
1266         case SetPortFeature:
1267         case ClearPortFeature:
1268                 ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1269                                                 wValue, wIndex, buf, wLength);
1270                 break;
1271
1272         /* Get status */
1273         case GetHubStatus:
1274         case GetPortStatus:
1275         case GetHubDescriptor:
1276                 ret = __usbhsh_hub_get_status(hpriv, typeReq,
1277                                               wValue, wIndex, buf, wLength);
1278                 break;
1279         }
1280
1281         dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1282                 typeReq, ret, usbhsh_port_stat_get(hpriv));
1283
1284         return ret;
1285 }
1286
1287 static int usbhsh_bus_nop(struct usb_hcd *hcd)
1288 {
1289         /* nothing to do */
1290         return 0;
1291 }
1292
1293 static struct hc_driver usbhsh_driver = {
1294         .description =          usbhsh_hcd_name,
1295         .hcd_priv_size =        sizeof(struct usbhsh_hpriv),
1296
1297         /*
1298          * generic hardware linkage
1299          */
1300         .flags =                HCD_USB2,
1301
1302         .start =                usbhsh_host_start,
1303         .stop =                 usbhsh_host_stop,
1304
1305         /*
1306          * managing i/o requests and associated device resources
1307          */
1308         .urb_enqueue =          usbhsh_urb_enqueue,
1309         .urb_dequeue =          usbhsh_urb_dequeue,
1310         .endpoint_disable =     usbhsh_endpoint_disable,
1311
1312         /*
1313          * root hub
1314          */
1315         .hub_status_data =      usbhsh_hub_status_data,
1316         .hub_control =          usbhsh_hub_control,
1317         .bus_suspend =          usbhsh_bus_nop,
1318         .bus_resume =           usbhsh_bus_nop,
1319 };
1320
1321 /*
1322  *              interrupt functions
1323  */
1324 static int usbhsh_irq_attch(struct usbhs_priv *priv,
1325                             struct usbhs_irq_state *irq_state)
1326 {
1327         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1328         struct device *dev = usbhs_priv_to_dev(priv);
1329
1330         dev_dbg(dev, "device attached\n");
1331
1332         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1333         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1334
1335         /*
1336          * attch interrupt might happen infinitely on some device
1337          * (on self power USB hub ?)
1338          * disable it here.
1339          *
1340          * usbhsh_is_running() becomes effective
1341          * according to this process.
1342          * see
1343          *      usbhsh_is_running()
1344          *      usbhsh_urb_enqueue()
1345          */
1346         hpriv->mod.irq_attch = NULL;
1347         usbhs_irq_callback_update(priv, &hpriv->mod);
1348
1349         return 0;
1350 }
1351
1352 static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1353                            struct usbhs_irq_state *irq_state)
1354 {
1355         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1356         struct device *dev = usbhs_priv_to_dev(priv);
1357
1358         dev_dbg(dev, "device detached\n");
1359
1360         usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1361         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1362
1363         /*
1364          * enable attch interrupt again
1365          *
1366          * usbhsh_is_running() becomes invalid
1367          * according to this process.
1368          * see
1369          *      usbhsh_is_running()
1370          *      usbhsh_urb_enqueue()
1371          */
1372         hpriv->mod.irq_attch = usbhsh_irq_attch;
1373         usbhs_irq_callback_update(priv, &hpriv->mod);
1374
1375         /*
1376          * usbhsh_queue_force_pop_all() should be called
1377          * after usbhsh_is_running() becomes invalid.
1378          */
1379         usbhsh_queue_force_pop_all(priv);
1380
1381         return 0;
1382 }
1383
1384 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1385                                 struct usbhs_irq_state *irq_state)
1386 {
1387         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1388         struct device *dev = usbhs_priv_to_dev(priv);
1389
1390         dev_dbg(dev, "setup packet OK\n");
1391
1392         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1393
1394         return 0;
1395 }
1396
1397 static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1398                                 struct usbhs_irq_state *irq_state)
1399 {
1400         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1401         struct device *dev = usbhs_priv_to_dev(priv);
1402
1403         dev_dbg(dev, "setup packet Err\n");
1404
1405         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1406
1407         return 0;
1408 }
1409
1410 /*
1411  *              module start/stop
1412  */
1413 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1414 {
1415         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1416         struct usbhs_pipe *pipe;
1417         u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
1418         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1419         int old_type, dir_in, i;
1420
1421         /* init all pipe */
1422         old_type = USB_ENDPOINT_XFER_CONTROL;
1423         for (i = 0; i < pipe_size; i++) {
1424
1425                 /*
1426                  * data "output" will be finished as soon as possible,
1427                  * but there is no guaranty at data "input" case.
1428                  *
1429                  * "input" needs "standby" pipe.
1430                  * So, "input" direction pipe > "output" direction pipe
1431                  * is good idea.
1432                  *
1433                  * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1434                  * and the other will be input direction here.
1435                  *
1436                  * ex)
1437                  * ...
1438                  * USB_ENDPOINT_XFER_ISOC -> dir out
1439                  * USB_ENDPOINT_XFER_ISOC -> dir in
1440                  * USB_ENDPOINT_XFER_BULK -> dir out
1441                  * USB_ENDPOINT_XFER_BULK -> dir in
1442                  * USB_ENDPOINT_XFER_BULK -> dir in
1443                  * ...
1444                  */
1445                 dir_in = (pipe_type[i] == old_type);
1446                 old_type = pipe_type[i];
1447
1448                 if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) {
1449                         pipe = usbhs_dcp_malloc(priv);
1450                         usbhsh_hpriv_to_dcp(hpriv) = pipe;
1451                 } else {
1452                         pipe = usbhs_pipe_malloc(priv,
1453                                                  pipe_type[i],
1454                                                  dir_in);
1455                 }
1456
1457                 pipe->mod_private = NULL;
1458         }
1459 }
1460
1461 static int usbhsh_start(struct usbhs_priv *priv)
1462 {
1463         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1464         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1465         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1466         struct device *dev = usbhs_priv_to_dev(priv);
1467         int ret;
1468
1469         /* add hcd */
1470         ret = usb_add_hcd(hcd, 0, 0);
1471         if (ret < 0)
1472                 return 0;
1473         device_wakeup_enable(hcd->self.controller);
1474
1475         /*
1476          * pipe initialize and enable DCP
1477          */
1478         usbhs_fifo_init(priv);
1479         usbhs_pipe_init(priv,
1480                         usbhsh_dma_map_ctrl);
1481         usbhsh_pipe_init_for_host(priv);
1482
1483         /*
1484          * system config enble
1485          * - HI speed
1486          * - host
1487          * - usb module
1488          */
1489         usbhs_sys_host_ctrl(priv, 1);
1490
1491         /*
1492          * enable irq callback
1493          */
1494         mod->irq_attch          = usbhsh_irq_attch;
1495         mod->irq_dtch           = usbhsh_irq_dtch;
1496         mod->irq_sack           = usbhsh_irq_setup_ack;
1497         mod->irq_sign           = usbhsh_irq_setup_err;
1498         usbhs_irq_callback_update(priv, mod);
1499
1500         dev_dbg(dev, "start host\n");
1501
1502         return ret;
1503 }
1504
1505 static int usbhsh_stop(struct usbhs_priv *priv)
1506 {
1507         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1508         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1509         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1510         struct device *dev = usbhs_priv_to_dev(priv);
1511
1512         /*
1513          * disable irq callback
1514          */
1515         mod->irq_attch  = NULL;
1516         mod->irq_dtch   = NULL;
1517         mod->irq_sack   = NULL;
1518         mod->irq_sign   = NULL;
1519         usbhs_irq_callback_update(priv, mod);
1520
1521         usb_remove_hcd(hcd);
1522
1523         /* disable sys */
1524         usbhs_sys_host_ctrl(priv, 0);
1525
1526         dev_dbg(dev, "quit host\n");
1527
1528         return 0;
1529 }
1530
1531 int usbhs_mod_host_probe(struct usbhs_priv *priv)
1532 {
1533         struct usbhsh_hpriv *hpriv;
1534         struct usb_hcd *hcd;
1535         struct usbhsh_device *udev;
1536         struct device *dev = usbhs_priv_to_dev(priv);
1537         int i;
1538
1539         /* initialize hcd */
1540         hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1541         if (!hcd) {
1542                 dev_err(dev, "Failed to create hcd\n");
1543                 return -ENOMEM;
1544         }
1545         hcd->has_tt = 1; /* for low/full speed */
1546
1547         /*
1548          * CAUTION
1549          *
1550          * There is no guarantee that it is possible to access usb module here.
1551          * Don't accesses to it.
1552          * The accesse will be enable after "usbhsh_start"
1553          */
1554
1555         hpriv = usbhsh_hcd_to_hpriv(hcd);
1556
1557         /*
1558          * register itself
1559          */
1560         usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1561
1562         /* init hpriv */
1563         hpriv->mod.name         = "host";
1564         hpriv->mod.start        = usbhsh_start;
1565         hpriv->mod.stop         = usbhsh_stop;
1566         usbhsh_port_stat_init(hpriv);
1567
1568         /* init all device */
1569         usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1570                 udev->usbv      = NULL;
1571                 INIT_LIST_HEAD(&udev->ep_list_head);
1572         }
1573
1574         dev_info(dev, "host probed\n");
1575
1576         return 0;
1577 }
1578
1579 int usbhs_mod_host_remove(struct usbhs_priv *priv)
1580 {
1581         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1582         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1583
1584         usb_put_hcd(hcd);
1585
1586         return 0;
1587 }