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  *              status
 195  */
 196 static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
 197 {
 198         /*
 199          * we can decide some device is attached or not
 200          * by checking mod.irq_attch
 201          * see
 202          *      usbhsh_irq_attch()
 203          *      usbhsh_irq_dtch()
 204          */
 205         return (hpriv->mod.irq_attch == NULL);
 206 }
 207
 208 /*
 209  *              pipe control
 210  */
 211 static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv,
 212                                           struct urb *urb,
 213                                           struct usbhs_pkt *pkt)
 214 {
 215         int len = urb->actual_length;
 216         int maxp = usb_endpoint_maxp(&urb->ep->desc);
 217         int t = 0;
 218
 219         /* DCP is out of sequence control */
 220         if (usb_pipecontrol(urb->pipe))
 221                 return;
 222
 223         /*
 224          * renesas_usbhs pipe has a limitation in a number.
 225          * So, driver should re-use the limited pipe for each device/endpoint.
 226          * DATA0/1 sequence should be saved for it.
 227          * see [image of mod_host]
 228          *     [HARDWARE LIMITATION]
 229          */
 230
 231         /*
 232          * next sequence depends on actual_length
 233          *
 234          * ex) actual_length = 1147, maxp = 512
 235          * data0 : 512
 236          * data1 : 512
 237          * data0 : 123
 238          * data1 is the next sequence
 239          */
 240         t = len / maxp;
 241         if (len % maxp)
 242                 t++;
 243         if (pkt->zero)
 244                 t++;
 245         t %= 2;
 246
 247         if (t)
 248                 usb_dotoggle(urb->dev,
 249                              usb_pipeendpoint(urb->pipe),
 250                              usb_pipeout(urb->pipe));
 251 }
 252
 253 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
 254                                                struct urb *urb);
 255
 256 static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
 257                               struct urb *urb)
 258 {
 259         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 260         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 261         struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
 262         struct usbhs_pipe *pipe;
 263         struct usb_endpoint_descriptor *desc = &urb->ep->desc;
 264         struct device *dev = usbhs_priv_to_dev(priv);
 265         unsigned long flags;
 266         int dir_in_req = !!usb_pipein(urb->pipe);
 267         int is_dcp = usb_endpoint_xfer_control(desc);
 268         int i, dir_in;
 269         int ret = -EBUSY;
 270
 271         /********************  spin lock ********************/
 272         usbhs_lock(priv, flags);
 273
 274         if (unlikely(usbhsh_uep_to_pipe(uep))) {
 275                 dev_err(dev, "uep already has pipe\n");
 276                 goto usbhsh_pipe_attach_done;
 277         }
 278
 279         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 280
 281                 /* check pipe type */
 282                 if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
 283                         continue;
 284
 285                 /* check pipe direction if normal pipe */
 286                 if (!is_dcp) {
 287                         dir_in = !!usbhs_pipe_is_dir_in(pipe);
 288                         if (0 != (dir_in - dir_in_req))
 289                                 continue;
 290                 }
 291
 292                 /* check pipe is free */
 293                 if (usbhsh_pipe_to_uep(pipe))
 294                         continue;
 295
 296                 /*
 297                  * attach pipe to uep
 298                  *
 299                  * usbhs_pipe_config_update() should be called after
 300                  * usbhs_set_device_config()
 301                  * see
 302                  *  DCPMAXP/PIPEMAXP
 303                  */
 304                 usbhsh_uep_to_pipe(uep)         = pipe;
 305                 usbhsh_pipe_to_uep(pipe)        = uep;
 306
 307                 usbhs_pipe_config_update(pipe,
 308                                          usbhsh_device_number(hpriv, udev),
 309                                          usb_endpoint_num(desc),
 310                                          usb_endpoint_maxp(desc));
 311
 312                 dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
 313                         usbhsh_device_number(hpriv, udev),
 314                         usb_endpoint_num(desc),
 315                         usbhs_pipe_name(pipe),
 316                         dir_in_req ? "in" : "out");
 317
 318                 ret = 0;
 319                 break;
 320         }
 321
 322 usbhsh_pipe_attach_done:
 323         usbhs_unlock(priv, flags);
 324         /********************  spin unlock ******************/
 325
 326         return ret;
 327 }
 328
 329 static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
 330                                struct usbhsh_ep *uep)
 331 {
 332         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 333         struct usbhs_pipe *pipe;
 334         struct device *dev = usbhs_priv_to_dev(priv);
 335         unsigned long flags;
 336
 337         /********************  spin lock ********************/
 338         usbhs_lock(priv, flags);
 339
 340         pipe = usbhsh_uep_to_pipe(uep);
 341
 342         if (unlikely(!pipe)) {
 343                 dev_err(dev, "uep doens't have pipe\n");
 344         } else {
 345                 struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
 346                 struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
 347
 348                 /* detach pipe from uep */
 349                 usbhsh_uep_to_pipe(uep)         = NULL;
 350                 usbhsh_pipe_to_uep(pipe)        = NULL;
 351
 352                 dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
 353                         usbhsh_device_number(hpriv, udev),
 354                         usb_endpoint_num(&ep->desc),
 355                         usbhs_pipe_name(pipe));
 356         }
 357
 358         usbhs_unlock(priv, flags);
 359         /********************  spin unlock ******************/
 360 }
 361
 362 /*
 363  *              endpoint control
 364  */
 365 static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
 366                                   struct urb *urb,
 367                                   gfp_t mem_flags)
 368 {
 369         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 370         struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
 371         struct usb_host_endpoint *ep = urb->ep;
 372         struct usbhsh_ep *uep;
 373         struct device *dev = usbhs_priv_to_dev(priv);
 374         struct usb_endpoint_descriptor *desc = &ep->desc;
 375         unsigned long flags;
 376
 377         uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
 378         if (!uep) {
 379                 dev_err(dev, "usbhsh_ep alloc fail\n");
 380                 return -ENOMEM;
 381         }
 382
 383         /********************  spin lock ********************/
 384         usbhs_lock(priv, flags);
 385
 386         /*
 387          * init endpoint
 388          */
 389         INIT_LIST_HEAD(&uep->ep_list);
 390         list_add_tail(&uep->ep_list, &udev->ep_list_head);
 391
 392         usbhsh_uep_to_udev(uep) = udev;
 393         usbhsh_uep_to_ep(uep)   = ep;
 394         usbhsh_ep_to_uep(ep)    = uep;
 395
 396         usbhs_unlock(priv, flags);
 397         /********************  spin unlock ******************/
 398
 399         dev_dbg(dev, "%s [%d-%d]\n", __func__,
 400                 usbhsh_device_number(hpriv, udev),
 401                 usb_endpoint_num(desc));
 402
 403         return 0;
 404 }
 405
 406 static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
 407                                    struct usb_host_endpoint *ep)
 408 {
 409         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 410         struct device *dev = usbhs_priv_to_dev(priv);
 411         struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
 412         unsigned long flags;
 413
 414         if (!uep)
 415                 return;
 416
 417         dev_dbg(dev, "%s [%d-%d]\n", __func__,
 418                 usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
 419                 usb_endpoint_num(&ep->desc));
 420
 421         if (usbhsh_uep_to_pipe(uep))
 422                 usbhsh_pipe_detach(hpriv, uep);
 423
 424         /********************  spin lock ********************/
 425         usbhs_lock(priv, flags);
 426
 427         /* remove this endpoint from udev */
 428         list_del_init(&uep->ep_list);
 429
 430         usbhsh_uep_to_udev(uep) = NULL;
 431         usbhsh_uep_to_ep(uep)   = NULL;
 432         usbhsh_ep_to_uep(ep)    = NULL;
 433
 434         usbhs_unlock(priv, flags);
 435         /********************  spin unlock ******************/
 436
 437         kfree(uep);
 438 }
 439
 440 static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
 441                                        struct usbhsh_device *udev)
 442 {
 443         struct usbhsh_ep *uep, *next;
 444
 445         list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
 446                 usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
 447 }
 448
 449 /*
 450  *              device control
 451  */
 452 static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
 453                                      struct usbhsh_device *udev)
 454 {
 455         struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
 456
 457         return hcd->self.root_hub == usbv->parent;
 458 }
 459
 460 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
 461 {
 462         return !list_empty(&udev->ep_list_head);
 463 }
 464
 465 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
 466                                                struct urb *urb)
 467 {
 468         struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 469         struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 470
 471         /* usbhsh_device_attach() is still not called */
 472         if (!udev)
 473                 return NULL;
 474
 475         /* if it is device0, return it */
 476         if (0 == usb_pipedevice(urb->pipe))
 477                 return usbhsh_device0(hpriv);
 478
 479         /* return attached device */
 480         return udev;
 481 }
 482
 483 static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
 484                                                  struct urb *urb)
 485 {
 486         struct usbhsh_device *udev = NULL;
 487         struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
 488         struct usbhsh_device *pos;
 489         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 490         struct device *dev = usbhsh_hcd_to_dev(hcd);
 491         struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 492         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 493         unsigned long flags;
 494         u16 upphub, hubport;
 495         int i;
 496
 497         /*
 498          * This function should be called only while urb is pointing to device0.
 499          * It will attach unused usbhsh_device to urb (usbv),
 500          * and initialize device0.
 501          * You can use usbhsh_device_get() to get "current" udev,
 502          * and usbhsh_usbv_to_udev() is for "attached" udev.
 503          */
 504         if (0 != usb_pipedevice(urb->pipe)) {
 505                 dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
 506                 return NULL;
 507         }
 508
 509         /********************  spin lock ********************/
 510         usbhs_lock(priv, flags);
 511
 512         /*
 513          * find unused device
 514          */
 515         usbhsh_for_each_udev(pos, hpriv, i) {
 516                 if (usbhsh_udev_is_used(pos))
 517                         continue;
 518                 udev = pos;
 519                 break;
 520         }
 521
 522         if (udev) {
 523                 /*
 524                  * usbhsh_usbv_to_udev()
 525                  * usbhsh_udev_to_usbv()
 526                  * will be enable
 527                  */
 528                 dev_set_drvdata(&usbv->dev, udev);
 529                 udev->usbv = usbv;
 530         }
 531
 532         usbhs_unlock(priv, flags);
 533         /********************  spin unlock ******************/
 534
 535         if (!udev) {
 536                 dev_err(dev, "no free usbhsh_device\n");
 537                 return NULL;
 538         }
 539
 540         if (usbhsh_device_has_endpoint(udev)) {
 541                 dev_warn(dev, "udev have old endpoint\n");
 542                 usbhsh_endpoint_detach_all(hpriv, udev);
 543         }
 544
 545         if (usbhsh_device_has_endpoint(udev0)) {
 546                 dev_warn(dev, "udev0 have old endpoint\n");
 547                 usbhsh_endpoint_detach_all(hpriv, udev0);
 548         }
 549
 550         /* uep will be attached */
 551         INIT_LIST_HEAD(&udev0->ep_list_head);
 552         INIT_LIST_HEAD(&udev->ep_list_head);
 553
 554         /*
 555          * set device0 config
 556          */
 557         usbhs_set_device_config(priv,
 558                                 0, 0, 0, usbv->speed);
 559
 560         /*
 561          * set new device config
 562          */
 563         upphub  = 0;
 564         hubport = 0;
 565         if (!usbhsh_connected_to_rhdev(hcd, udev)) {
 566                 /* if udev is not connected to rhdev, it means parent is Hub */
 567                 struct usbhsh_device *parent = usbhsh_device_parent(udev);
 568
 569                 upphub  = usbhsh_device_number(hpriv, parent);
 570                 hubport = usbhsh_device_hubport(udev);
 571
 572                 dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__,
 573                         upphub, hubport, parent);
 574         }
 575
 576         usbhs_set_device_config(priv,
 577                                usbhsh_device_number(hpriv, udev),
 578                                upphub, hubport, usbv->speed);
 579
 580         dev_dbg(dev, "%s [%d](%p)\n", __func__,
 581                 usbhsh_device_number(hpriv, udev), udev);
 582
 583         return udev;
 584 }
 585
 586 static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
 587                                struct usbhsh_device *udev)
 588 {
 589         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 590         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 591         struct device *dev = usbhsh_hcd_to_dev(hcd);
 592         struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
 593         unsigned long flags;
 594
 595         dev_dbg(dev, "%s [%d](%p)\n", __func__,
 596                 usbhsh_device_number(hpriv, udev), udev);
 597
 598         if (usbhsh_device_has_endpoint(udev)) {
 599                 dev_warn(dev, "udev still have endpoint\n");
 600                 usbhsh_endpoint_detach_all(hpriv, udev);
 601         }
 602
 603         /*
 604          * There is nothing to do if it is device0.
 605          * see
 606          *  usbhsh_device_attach()
 607          *  usbhsh_device_get()
 608          */
 609         if (0 == usbhsh_device_number(hpriv, udev))
 610                 return;
 611
 612         /********************  spin lock ********************/
 613         usbhs_lock(priv, flags);
 614
 615         /*
 616          * usbhsh_usbv_to_udev()
 617          * usbhsh_udev_to_usbv()
 618          * will be disable
 619          */
 620         dev_set_drvdata(&usbv->dev, NULL);
 621         udev->usbv = NULL;
 622
 623         usbhs_unlock(priv, flags);
 624         /********************  spin unlock ******************/
 625 }
 626
 627 /*
 628  *              queue push/pop
 629  */
 630 static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
 631 {
 632         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 633         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 634         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 635         struct urb *urb = ureq->urb;
 636         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 637         struct device *dev = usbhs_priv_to_dev(priv);
 638         int status = 0;
 639
 640         dev_dbg(dev, "%s\n", __func__);
 641
 642         if (!urb) {
 643                 dev_warn(dev, "pkt doesn't have urb\n");
 644                 return;
 645         }
 646
 647         if (!usbhsh_is_running(hpriv))
 648                 status = -ESHUTDOWN;
 649
 650         urb->actual_length = pkt->actual;
 651         usbhsh_ureq_free(hpriv, ureq);
 652
 653         usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
 654         usbhsh_pipe_detach(hpriv, uep);
 655
 656         usb_hcd_unlink_urb_from_ep(hcd, urb);
 657         usb_hcd_giveback_urb(hcd, urb, status);
 658 }
 659
 660 static int usbhsh_queue_push(struct usb_hcd *hcd,
 661                              struct urb *urb,
 662                              gfp_t mem_flags)
 663 {
 664         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 665         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 666         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 667         struct device *dev = usbhsh_hcd_to_dev(hcd);
 668         struct usbhsh_request *ureq;
 669         void *buf;
 670         int len, sequence;
 671
 672         if (usb_pipeisoc(urb->pipe)) {
 673                 dev_err(dev, "pipe iso is not supported now\n");
 674                 return -EIO;
 675         }
 676
 677         /* this ureq will be freed on usbhsh_queue_done() */
 678         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 679         if (unlikely(!ureq)) {
 680                 dev_err(dev, "ureq alloc fail\n");
 681                 return -ENOMEM;
 682         }
 683
 684         if (usb_pipein(urb->pipe))
 685                 pipe->handler = &usbhs_fifo_pio_pop_handler;
 686         else
 687                 pipe->handler = &usbhs_fifo_pio_push_handler;
 688
 689         buf = (void *)(urb->transfer_buffer + urb->actual_length);
 690         len = urb->transfer_buffer_length - urb->actual_length;
 691
 692         sequence = usb_gettoggle(urb->dev,
 693                                  usb_pipeendpoint(urb->pipe),
 694                                  usb_pipeout(urb->pipe));
 695
 696         dev_dbg(dev, "%s\n", __func__);
 697         usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
 698                        buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
 699                        sequence);
 700
 701         usbhs_pkt_start(pipe);
 702
 703         return 0;
 704 }
 705
 706 static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
 707                                    struct usbhs_pipe *pipe)
 708 {
 709         struct usbhs_pkt *pkt;
 710
 711         while (1) {
 712                 pkt = usbhs_pkt_pop(pipe, NULL);
 713                 if (!pkt)
 714                         break;
 715
 716                 /*
 717                  * if all packet are gone, usbhsh_endpoint_disable()
 718                  * will be called.
 719                  * then, attached device/endpoint/pipe will be detached
 720                  */
 721                 usbhsh_queue_done(priv, pkt);
 722         }
 723 }
 724
 725 static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
 726 {
 727         struct usbhs_pipe *pos;
 728         int i;
 729
 730         usbhs_for_each_pipe_with_dcp(pos, priv, i)
 731                 usbhsh_queue_force_pop(priv, pos);
 732 }
 733
 734 /*
 735  *              DCP setup stage
 736  */
 737 static int usbhsh_is_request_address(struct urb *urb)
 738 {
 739         struct usb_ctrlrequest *req;
 740
 741         req = (struct usb_ctrlrequest *)urb->setup_packet;
 742
 743         if ((DeviceOutRequest    == req->bRequestType << 8) &&
 744             (USB_REQ_SET_ADDRESS == req->bRequest))
 745                 return 1;
 746         else
 747                 return 0;
 748 }
 749
 750 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
 751                                            struct urb *urb,
 752                                            struct usbhs_pipe *pipe)
 753 {
 754         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 755         struct usb_ctrlrequest req;
 756         struct device *dev = usbhs_priv_to_dev(priv);
 757
 758         /*
 759          * wait setup packet ACK
 760          * see
 761          *      usbhsh_irq_setup_ack()
 762          *      usbhsh_irq_setup_err()
 763          */
 764         init_completion(&hpriv->setup_ack_done);
 765
 766         /* copy original request */
 767         memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
 768
 769         /*
 770          * renesas_usbhs can not use original usb address.
 771          * see HARDWARE LIMITATION.
 772          * modify usb address here to use attached device.
 773          * see usbhsh_device_attach()
 774          */
 775         if (usbhsh_is_request_address(urb)) {
 776                 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 777                 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 778
 779                 /* udev is a attached device */
 780                 req.wValue = usbhsh_device_number(hpriv, udev);
 781                 dev_dbg(dev, "create new address - %d\n", req.wValue);
 782         }
 783
 784         /* set request */
 785         usbhs_usbreq_set_val(priv, &req);
 786
 787         /*
 788          * wait setup packet ACK
 789          */
 790         wait_for_completion(&hpriv->setup_ack_done);
 791
 792         dev_dbg(dev, "%s done\n", __func__);
 793 }
 794
 795 /*
 796  *              DCP data stage
 797  */
 798 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
 799                                           struct usbhs_pkt *pkt)
 800 {
 801         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 802         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 803
 804         /* this ureq was connected to urb when usbhsh_urb_enqueue()  */
 805
 806         usbhsh_ureq_free(hpriv, ureq);
 807 }
 808
 809 static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
 810                                          struct urb *urb,
 811                                          struct usbhs_pipe *pipe,
 812                                          gfp_t mem_flags)
 813
 814 {
 815         struct usbhsh_request *ureq;
 816
 817         /* this ureq will be freed on usbhsh_data_stage_packet_done() */
 818         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 819         if (unlikely(!ureq))
 820                 return -ENOMEM;
 821
 822         if (usb_pipein(urb->pipe))
 823                 pipe->handler = &usbhs_dcp_data_stage_in_handler;
 824         else
 825                 pipe->handler = &usbhs_dcp_data_stage_out_handler;
 826
 827         usbhs_pkt_push(pipe, &ureq->pkt,
 828                        usbhsh_data_stage_packet_done,
 829                        urb->transfer_buffer,
 830                        urb->transfer_buffer_length,
 831                        (urb->transfer_flags & URB_ZERO_PACKET),
 832                        -1);
 833
 834         return 0;
 835 }
 836
 837 /*
 838  *              DCP status stage
 839  */
 840 static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
 841                                             struct urb *urb,
 842                                             struct usbhs_pipe *pipe,
 843                                             gfp_t mem_flags)
 844 {
 845         struct usbhsh_request *ureq;
 846
 847         /* This ureq will be freed on usbhsh_queue_done() */
 848         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 849         if (unlikely(!ureq))
 850                 return -ENOMEM;
 851
 852         if (usb_pipein(urb->pipe))
 853                 pipe->handler = &usbhs_dcp_status_stage_in_handler;
 854         else
 855                 pipe->handler = &usbhs_dcp_status_stage_out_handler;
 856
 857         usbhs_pkt_push(pipe, &ureq->pkt,
 858                        usbhsh_queue_done,
 859                        NULL,
 860                        urb->transfer_buffer_length,
 861                        0, -1);
 862
 863         return 0;
 864 }
 865
 866 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
 867                                  struct urb *urb,
 868                                  gfp_t mflags)
 869 {
 870         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 871         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 872         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 873         struct device *dev = usbhsh_hcd_to_dev(hcd);
 874         int ret;
 875
 876         dev_dbg(dev, "%s\n", __func__);
 877
 878         /*
 879          * setup stage
 880          *
 881          * usbhsh_send_setup_stage_packet() wait SACK/SIGN
 882          */
 883         usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
 884
 885         /*
 886          * data stage
 887          *
 888          * It is pushed only when urb has buffer.
 889          */
 890         if (urb->transfer_buffer_length) {
 891                 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
 892                 if (ret < 0) {
 893                         dev_err(dev, "data stage failed\n");
 894                         return ret;
 895                 }
 896         }
 897
 898         /*
 899          * status stage
 900          */
 901         ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
 902         if (ret < 0) {
 903                 dev_err(dev, "status stage failed\n");
 904                 return ret;
 905         }
 906
 907         /*
 908          * start pushed packets
 909          */
 910         usbhs_pkt_start(pipe);
 911
 912         return 0;
 913 }
 914
 915 /*
 916  *              dma map functions
 917  */
 918 static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
 919 {
 920         return 0;
 921 }
 922
 923 /*
 924  *              for hc_driver
 925  */
 926 static int usbhsh_host_start(struct usb_hcd *hcd)
 927 {
 928         return 0;
 929 }
 930
 931 static void usbhsh_host_stop(struct usb_hcd *hcd)
 932 {
 933 }
 934
 935 static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
 936                               struct urb *urb,
 937                               gfp_t mem_flags)
 938 {
 939         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 940         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 941         struct device *dev = usbhs_priv_to_dev(priv);
 942         struct usb_host_endpoint *ep = urb->ep;
 943         struct usbhsh_device *new_udev = NULL;
 944         int is_dir_in = usb_pipein(urb->pipe);
 945         int i;
 946         int ret;
 947
 948         dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
 949
 950         if (!usbhsh_is_running(hpriv)) {
 951                 ret = -EIO;
 952                 dev_err(dev, "host is not running\n");
 953                 goto usbhsh_urb_enqueue_error_not_linked;
 954         }
 955
 956         ret = usb_hcd_link_urb_to_ep(hcd, urb);
 957         if (ret) {
 958                 dev_err(dev, "urb link failed\n");
 959                 goto usbhsh_urb_enqueue_error_not_linked;
 960         }
 961
 962         /*
 963          * attach udev if needed
 964          * see [image of mod_host]
 965          */
 966         if (!usbhsh_device_get(hpriv, urb)) {
 967                 new_udev = usbhsh_device_attach(hpriv, urb);
 968                 if (!new_udev) {
 969                         ret = -EIO;
 970                         dev_err(dev, "device attach failed\n");
 971                         goto usbhsh_urb_enqueue_error_not_linked;
 972                 }
 973         }
 974
 975         /*
 976          * attach endpoint if needed
 977          * see [image of mod_host]
 978          */
 979         if (!usbhsh_ep_to_uep(ep)) {
 980                 ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
 981                 if (ret < 0) {
 982                         dev_err(dev, "endpoint attach failed\n");
 983                         goto usbhsh_urb_enqueue_error_free_device;
 984                 }
 985         }
 986
 987         /*
 988          * attach pipe to endpoint
 989          * see [image of mod_host]
 990          */
 991         for (i = 0; i < 1024; i++) {
 992                 ret = usbhsh_pipe_attach(hpriv, urb);
 993                 if (ret < 0)
 994                         msleep(100);
 995                 else
 996                         break;
 997         }
 998         if (ret < 0) {
 999                 dev_err(dev, "pipe attach failed\n");
1000                 goto usbhsh_urb_enqueue_error_free_endpoint;
1001         }
1002
1003         /*
1004          * push packet
1005          */
1006         if (usb_pipecontrol(urb->pipe))
1007                 ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1008         else
1009                 ret = usbhsh_queue_push(hcd, urb, mem_flags);
1010
1011         return ret;
1012
1013 usbhsh_urb_enqueue_error_free_endpoint:
1014         usbhsh_endpoint_detach(hpriv, ep);
1015 usbhsh_urb_enqueue_error_free_device:
1016         if (new_udev)
1017                 usbhsh_device_detach(hpriv, new_udev);
1018 usbhsh_urb_enqueue_error_not_linked:
1019
1020         dev_dbg(dev, "%s error\n", __func__);
1021
1022         return ret;
1023 }
1024
1025 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1026 {
1027         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1028         struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1029
1030         if (ureq) {
1031                 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1032                 struct usbhs_pkt *pkt = &ureq->pkt;
1033
1034                 usbhs_pkt_pop(pkt->pipe, pkt);
1035                 usbhsh_queue_done(priv, pkt);
1036         }
1037
1038         return 0;
1039 }
1040
1041 static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1042                                     struct usb_host_endpoint *ep)
1043 {
1044         struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1045         struct usbhsh_device *udev;
1046         struct usbhsh_hpriv *hpriv;
1047
1048         /*
1049          * this function might be called manytimes by same hcd/ep
1050          * in-endpoint == out-endpoint if ep == dcp.
1051          */
1052         if (!uep)
1053                 return;
1054
1055         udev    = usbhsh_uep_to_udev(uep);
1056         hpriv   = usbhsh_hcd_to_hpriv(hcd);
1057
1058         usbhsh_endpoint_detach(hpriv, ep);
1059
1060         /*
1061          * if there is no endpoint,
1062          * free device
1063          */
1064         if (!usbhsh_device_has_endpoint(udev))
1065                 usbhsh_device_detach(hpriv, udev);
1066 }
1067
1068 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1069 {
1070         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1071         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1072         struct device *dev = usbhs_priv_to_dev(priv);
1073         int roothub_id = 1; /* only 1 root hub */
1074
1075         /*
1076          * does port stat was changed ?
1077          * check USB_PORT_STAT_C_xxx << 16
1078          */
1079         if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
1080                 *buf = (1 << roothub_id);
1081         else
1082                 *buf = 0;
1083
1084         dev_dbg(dev, "%s (%02x)\n", __func__, *buf);
1085
1086         return !!(*buf);
1087 }
1088
1089 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1090                                     u16 typeReq, u16 wValue,
1091                                     u16 wIndex, char *buf, u16 wLength)
1092 {
1093         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1094         struct device *dev = usbhs_priv_to_dev(priv);
1095
1096         switch (wValue) {
1097         case C_HUB_OVER_CURRENT:
1098         case C_HUB_LOCAL_POWER:
1099                 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1100                 return 0;
1101         }
1102
1103         return -EPIPE;
1104 }
1105
1106 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1107                                      u16 typeReq, u16 wValue,
1108                                      u16 wIndex, char *buf, u16 wLength)
1109 {
1110         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1111         struct device *dev = usbhs_priv_to_dev(priv);
1112         int enable = (typeReq == SetPortFeature);
1113         int speed, i, timeout = 128;
1114         int roothub_id = 1; /* only 1 root hub */
1115
1116         /* common error */
1117         if (wIndex > roothub_id || wLength != 0)
1118                 return -EPIPE;
1119
1120         /* check wValue */
1121         switch (wValue) {
1122         case USB_PORT_FEAT_POWER:
1123                 usbhs_vbus_ctrl(priv, enable);
1124                 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1125                 break;
1126
1127         case USB_PORT_FEAT_ENABLE:
1128         case USB_PORT_FEAT_SUSPEND:
1129         case USB_PORT_FEAT_C_ENABLE:
1130         case USB_PORT_FEAT_C_SUSPEND:
1131         case USB_PORT_FEAT_C_CONNECTION:
1132         case USB_PORT_FEAT_C_OVER_CURRENT:
1133         case USB_PORT_FEAT_C_RESET:
1134                 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1135                 break;
1136
1137         case USB_PORT_FEAT_RESET:
1138                 if (!enable)
1139                         break;
1140
1141                 usbhsh_port_stat_clear(hpriv,
1142                                        USB_PORT_STAT_HIGH_SPEED |
1143                                        USB_PORT_STAT_LOW_SPEED);
1144
1145                 usbhsh_queue_force_pop_all(priv);
1146
1147                 usbhs_bus_send_reset(priv);
1148                 msleep(20);
1149                 usbhs_bus_send_sof_enable(priv);
1150
1151                 for (i = 0; i < timeout ; i++) {
1152                         switch (usbhs_bus_get_speed(priv)) {
1153                         case USB_SPEED_LOW:
1154                                 speed = USB_PORT_STAT_LOW_SPEED;
1155                                 goto got_usb_bus_speed;
1156                         case USB_SPEED_HIGH:
1157                                 speed = USB_PORT_STAT_HIGH_SPEED;
1158                                 goto got_usb_bus_speed;
1159                         case USB_SPEED_FULL:
1160                                 speed = 0;
1161                                 goto got_usb_bus_speed;
1162                         }
1163
1164                         msleep(20);
1165                 }
1166                 return -EPIPE;
1167
1168 got_usb_bus_speed:
1169                 usbhsh_port_stat_set(hpriv, speed);
1170                 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1171
1172                 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1173                         __func__, speed);
1174
1175                 /* status change is not needed */
1176                 return 0;
1177
1178         default:
1179                 return -EPIPE;
1180         }
1181
1182         /* set/clear status */
1183         if (enable)
1184                 usbhsh_port_stat_set(hpriv, (1 << wValue));
1185         else
1186                 usbhsh_port_stat_clear(hpriv, (1 << wValue));
1187
1188         return 0;
1189 }
1190
1191 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1192                                    u16 typeReq, u16 wValue,
1193                                    u16 wIndex, char *buf, u16 wLength)
1194 {
1195         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1196         struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1197         struct device *dev = usbhs_priv_to_dev(priv);
1198         int roothub_id = 1; /* only 1 root hub */
1199
1200         switch (typeReq) {
1201         case GetHubStatus:
1202                 dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1203
1204                 *buf = 0x00;
1205                 break;
1206
1207         case GetPortStatus:
1208                 if (wIndex != roothub_id)
1209                         return -EPIPE;
1210
1211                 dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1212                 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1213                 break;
1214
1215         case GetHubDescriptor:
1216                 desc->bDescriptorType           = 0x29;
1217                 desc->bHubContrCurrent          = 0;
1218                 desc->bNbrPorts                 = roothub_id;
1219                 desc->bDescLength               = 9;
1220                 desc->bPwrOn2PwrGood            = 0;
1221                 desc->wHubCharacteristics       = cpu_to_le16(0x0011);
1222                 desc->u.hs.DeviceRemovable[0]   = (roothub_id << 1);
1223                 desc->u.hs.DeviceRemovable[1]   = ~0;
1224                 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1225                 break;
1226         }
1227
1228         return 0;
1229 }
1230
1231 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1232                               u16 wIndex, char *buf, u16 wLength)
1233 {
1234         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1235         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1236         struct device *dev = usbhs_priv_to_dev(priv);
1237         int ret = -EPIPE;
1238
1239         switch (typeReq) {
1240
1241         /* Hub Feature */
1242         case ClearHubFeature:
1243         case SetHubFeature:
1244                 ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1245                                                wValue, wIndex, buf, wLength);
1246                 break;
1247
1248         /* Port Feature */
1249         case SetPortFeature:
1250         case ClearPortFeature:
1251                 ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1252                                                 wValue, wIndex, buf, wLength);
1253                 break;
1254
1255         /* Get status */
1256         case GetHubStatus:
1257         case GetPortStatus:
1258         case GetHubDescriptor:
1259                 ret = __usbhsh_hub_get_status(hpriv, typeReq,
1260                                               wValue, wIndex, buf, wLength);
1261                 break;
1262         }
1263
1264         dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1265                 typeReq, ret, usbhsh_port_stat_get(hpriv));
1266
1267         return ret;
1268 }
1269
1270 static struct hc_driver usbhsh_driver = {
1271         .description =          usbhsh_hcd_name,
1272         .hcd_priv_size =        sizeof(struct usbhsh_hpriv),
1273
1274         /*
1275          * generic hardware linkage
1276          */
1277         .flags =                HCD_USB2,
1278
1279         .start =                usbhsh_host_start,
1280         .stop =                 usbhsh_host_stop,
1281
1282         /*
1283          * managing i/o requests and associated device resources
1284          */
1285         .urb_enqueue =          usbhsh_urb_enqueue,
1286         .urb_dequeue =          usbhsh_urb_dequeue,
1287         .endpoint_disable =     usbhsh_endpoint_disable,
1288
1289         /*
1290          * root hub
1291          */
1292         .hub_status_data =      usbhsh_hub_status_data,
1293         .hub_control =          usbhsh_hub_control,
1294 };
1295
1296 /*
1297  *              interrupt functions
1298  */
1299 static int usbhsh_irq_attch(struct usbhs_priv *priv,
1300                             struct usbhs_irq_state *irq_state)
1301 {
1302         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1303         struct device *dev = usbhs_priv_to_dev(priv);
1304
1305         dev_dbg(dev, "device attached\n");
1306
1307         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1308         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1309
1310         /*
1311          * attch interrupt might happen infinitely on some device
1312          * (on self power USB hub ?)
1313          * disable it here.
1314          *
1315          * usbhsh_is_running() becomes effective
1316          * according to this process.
1317          * see
1318          *      usbhsh_is_running()
1319          *      usbhsh_urb_enqueue()
1320          */
1321         hpriv->mod.irq_attch = NULL;
1322         usbhs_irq_callback_update(priv, &hpriv->mod);
1323
1324         return 0;
1325 }
1326
1327 static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1328                            struct usbhs_irq_state *irq_state)
1329 {
1330         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1331         struct device *dev = usbhs_priv_to_dev(priv);
1332
1333         dev_dbg(dev, "device detached\n");
1334
1335         usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1336         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1337
1338         /*
1339          * enable attch interrupt again
1340          *
1341          * usbhsh_is_running() becomes invalid
1342          * according to this process.
1343          * see
1344          *      usbhsh_is_running()
1345          *      usbhsh_urb_enqueue()
1346          */
1347         hpriv->mod.irq_attch = usbhsh_irq_attch;
1348         usbhs_irq_callback_update(priv, &hpriv->mod);
1349
1350         /*
1351          * usbhsh_queue_force_pop_all() should be called
1352          * after usbhsh_is_running() becomes invalid.
1353          */
1354         usbhsh_queue_force_pop_all(priv);
1355
1356         return 0;
1357 }
1358
1359 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1360                                 struct usbhs_irq_state *irq_state)
1361 {
1362         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1363         struct device *dev = usbhs_priv_to_dev(priv);
1364
1365         dev_dbg(dev, "setup packet OK\n");
1366
1367         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1368
1369         return 0;
1370 }
1371
1372 static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1373                                 struct usbhs_irq_state *irq_state)
1374 {
1375         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1376         struct device *dev = usbhs_priv_to_dev(priv);
1377
1378         dev_dbg(dev, "setup packet Err\n");
1379
1380         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1381
1382         return 0;
1383 }
1384
1385 /*
1386  *              module start/stop
1387  */
1388 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1389 {
1390         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1391         struct usbhs_pipe *pipe;
1392         u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
1393         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1394         int old_type, dir_in, i;
1395
1396         /* init all pipe */
1397         old_type = USB_ENDPOINT_XFER_CONTROL;
1398         for (i = 0; i < pipe_size; i++) {
1399
1400                 /*
1401                  * data "output" will be finished as soon as possible,
1402                  * but there is no guaranty at data "input" case.
1403                  *
1404                  * "input" needs "standby" pipe.
1405                  * So, "input" direction pipe > "output" direction pipe
1406                  * is good idea.
1407                  *
1408                  * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1409                  * and the other will be input direction here.
1410                  *
1411                  * ex)
1412                  * ...
1413                  * USB_ENDPOINT_XFER_ISOC -> dir out
1414                  * USB_ENDPOINT_XFER_ISOC -> dir in
1415                  * USB_ENDPOINT_XFER_BULK -> dir out
1416                  * USB_ENDPOINT_XFER_BULK -> dir in
1417                  * USB_ENDPOINT_XFER_BULK -> dir in
1418                  * ...
1419                  */
1420                 dir_in = (pipe_type[i] == old_type);
1421                 old_type = pipe_type[i];
1422
1423                 if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) {
1424                         pipe = usbhs_dcp_malloc(priv);
1425                         usbhsh_hpriv_to_dcp(hpriv) = pipe;
1426                 } else {
1427                         pipe = usbhs_pipe_malloc(priv,
1428                                                  pipe_type[i],
1429                                                  dir_in);
1430                 }
1431
1432                 pipe->mod_private = NULL;
1433         }
1434 }
1435
1436 static int usbhsh_start(struct usbhs_priv *priv)
1437 {
1438         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1439         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1440         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1441         struct device *dev = usbhs_priv_to_dev(priv);
1442         int ret;
1443
1444         /* add hcd */
1445         ret = usb_add_hcd(hcd, 0, 0);
1446         if (ret < 0)
1447                 return 0;
1448
1449         /*
1450          * pipe initialize and enable DCP
1451          */
1452         usbhs_pipe_init(priv,
1453                         usbhsh_dma_map_ctrl);
1454         usbhs_fifo_init(priv);
1455         usbhsh_pipe_init_for_host(priv);
1456
1457         /*
1458          * system config enble
1459          * - HI speed
1460          * - host
1461          * - usb module
1462          */
1463         usbhs_sys_host_ctrl(priv, 1);
1464
1465         /*
1466          * enable irq callback
1467          */
1468         mod->irq_attch          = usbhsh_irq_attch;
1469         mod->irq_dtch           = usbhsh_irq_dtch;
1470         mod->irq_sack           = usbhsh_irq_setup_ack;
1471         mod->irq_sign           = usbhsh_irq_setup_err;
1472         usbhs_irq_callback_update(priv, mod);
1473
1474         dev_dbg(dev, "start host\n");
1475
1476         return ret;
1477 }
1478
1479 static int usbhsh_stop(struct usbhs_priv *priv)
1480 {
1481         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1482         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1483         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1484         struct device *dev = usbhs_priv_to_dev(priv);
1485
1486         /*
1487          * disable irq callback
1488          */
1489         mod->irq_attch  = NULL;
1490         mod->irq_dtch   = NULL;
1491         mod->irq_sack   = NULL;
1492         mod->irq_sign   = NULL;
1493         usbhs_irq_callback_update(priv, mod);
1494
1495         usb_remove_hcd(hcd);
1496
1497         /* disable sys */
1498         usbhs_sys_host_ctrl(priv, 0);
1499
1500         dev_dbg(dev, "quit host\n");
1501
1502         return 0;
1503 }
1504
1505 int usbhs_mod_host_probe(struct usbhs_priv *priv)
1506 {
1507         struct usbhsh_hpriv *hpriv;
1508         struct usb_hcd *hcd;
1509         struct usbhsh_device *udev;
1510         struct device *dev = usbhs_priv_to_dev(priv);
1511         int i;
1512
1513         /* initialize hcd */
1514         hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1515         if (!hcd) {
1516                 dev_err(dev, "Failed to create hcd\n");
1517                 return -ENOMEM;
1518         }
1519
1520         /*
1521          * CAUTION
1522          *
1523          * There is no guarantee that it is possible to access usb module here.
1524          * Don't accesses to it.
1525          * The accesse will be enable after "usbhsh_start"
1526          */
1527
1528         hpriv = usbhsh_hcd_to_hpriv(hcd);
1529
1530         /*
1531          * register itself
1532          */
1533         usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1534
1535         /* init hpriv */
1536         hpriv->mod.name         = "host";
1537         hpriv->mod.start        = usbhsh_start;
1538         hpriv->mod.stop         = usbhsh_stop;
1539         usbhsh_port_stat_init(hpriv);
1540
1541         /* init all device */
1542         usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1543                 udev->usbv      = NULL;
1544                 INIT_LIST_HEAD(&udev->ep_list_head);
1545         }
1546
1547         dev_info(dev, "host probed\n");
1548
1549         return 0;
1550 }
1551
1552 int usbhs_mod_host_remove(struct usbhs_priv *priv)
1553 {
1554         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1555         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1556
1557         usb_put_hcd(hcd);
1558
1559         return 0;
1560 }