drivers/usb/renesas_usbhs/mod_host.c

   1 /*
   2  * Renesas USB driver
   3  *
   4  * Copyright (C) 2011 Renesas Solutions Corp.
   5  * Kuninori Morimoto <[email protected]>
   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
 170         ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
 171         if (!ureq)
 172                 return NULL;
 173
 174         usbhs_pkt_init(&ureq->pkt);
 175         ureq->urb = urb;
 176         usbhsh_urb_to_ureq(urb) = ureq;
 177
 178         return ureq;
 179 }
 180
 181 static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
 182                             struct usbhsh_request *ureq)
 183 {
 184         usbhsh_urb_to_ureq(ureq->urb) = NULL;
 185         ureq->urb = NULL;
 186
 187         kfree(ureq);
 188 }
 189
 190 /*
 191  *              status
 192  */
 193 static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
 194 {
 195         /*
 196          * we can decide some device is attached or not
 197          * by checking mod.irq_attch
 198          * see
 199          *      usbhsh_irq_attch()
 200          *      usbhsh_irq_dtch()
 201          */
 202         return (hpriv->mod.irq_attch == NULL);
 203 }
 204
 205 /*
 206  *              pipe control
 207  */
 208 static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv,
 209                                           struct urb *urb,
 210                                           struct usbhs_pkt *pkt)
 211 {
 212         int len = urb->actual_length;
 213         int maxp = usb_endpoint_maxp(&urb->ep->desc);
 214         int t = 0;
 215
 216         /* DCP is out of sequence control */
 217         if (usb_pipecontrol(urb->pipe))
 218                 return;
 219
 220         /*
 221          * renesas_usbhs pipe has a limitation in a number.
 222          * So, driver should re-use the limited pipe for each device/endpoint.
 223          * DATA0/1 sequence should be saved for it.
 224          * see [image of mod_host]
 225          *     [HARDWARE LIMITATION]
 226          */
 227
 228         /*
 229          * next sequence depends on actual_length
 230          *
 231          * ex) actual_length = 1147, maxp = 512
 232          * data0 : 512
 233          * data1 : 512
 234          * data0 : 123
 235          * data1 is the next sequence
 236          */
 237         t = len / maxp;
 238         if (len % maxp)
 239                 t++;
 240         if (pkt->zero)
 241                 t++;
 242         t %= 2;
 243
 244         if (t)
 245                 usb_dotoggle(urb->dev,
 246                              usb_pipeendpoint(urb->pipe),
 247                              usb_pipeout(urb->pipe));
 248 }
 249
 250 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
 251                                                struct urb *urb);
 252
 253 static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
 254                               struct urb *urb)
 255 {
 256         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 257         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 258         struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
 259         struct usbhs_pipe *pipe;
 260         struct usb_endpoint_descriptor *desc = &urb->ep->desc;
 261         struct device *dev = usbhs_priv_to_dev(priv);
 262         unsigned long flags;
 263         int dir_in_req = !!usb_pipein(urb->pipe);
 264         int is_dcp = usb_endpoint_xfer_control(desc);
 265         int i, dir_in;
 266         int ret = -EBUSY;
 267
 268         /********************  spin lock ********************/
 269         usbhs_lock(priv, flags);
 270
 271         /*
 272          * if uep has been attached to pipe,
 273          * reuse it
 274          */
 275         if (usbhsh_uep_to_pipe(uep)) {
 276                 ret = 0;
 277                 goto usbhsh_pipe_attach_done;
 278         }
 279
 280         usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 281
 282                 /* check pipe type */
 283                 if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
 284                         continue;
 285
 286                 /* check pipe direction if normal pipe */
 287                 if (!is_dcp) {
 288                         dir_in = !!usbhs_pipe_is_dir_in(pipe);
 289                         if (0 != (dir_in - dir_in_req))
 290                                 continue;
 291                 }
 292
 293                 /* check pipe is free */
 294                 if (usbhsh_pipe_to_uep(pipe))
 295                         continue;
 296
 297                 /*
 298                  * attach pipe to uep
 299                  *
 300                  * usbhs_pipe_config_update() should be called after
 301                  * usbhs_set_device_config()
 302                  * see
 303                  *  DCPMAXP/PIPEMAXP
 304                  */
 305                 usbhsh_uep_to_pipe(uep)         = pipe;
 306                 usbhsh_pipe_to_uep(pipe)        = uep;
 307
 308                 usbhs_pipe_config_update(pipe,
 309                                          usbhsh_device_number(hpriv, udev),
 310                                          usb_endpoint_num(desc),
 311                                          usb_endpoint_maxp(desc));
 312
 313                 dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
 314                         usbhsh_device_number(hpriv, udev),
 315                         usb_endpoint_num(desc),
 316                         usbhs_pipe_name(pipe),
 317                         dir_in_req ? "in" : "out");
 318
 319                 ret = 0;
 320                 break;
 321         }
 322
 323 usbhsh_pipe_attach_done:
 324         if (0 == ret)
 325                 uep->counter++;
 326
 327         usbhs_unlock(priv, flags);
 328         /********************  spin unlock ******************/
 329
 330         return ret;
 331 }
 332
 333 static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
 334                                struct usbhsh_ep *uep)
 335 {
 336         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 337         struct usbhs_pipe *pipe;
 338         struct device *dev = usbhs_priv_to_dev(priv);
 339         unsigned long flags;
 340
 341         if (unlikely(!uep)) {
 342                 dev_err(dev, "no uep\n");
 343                 return;
 344         }
 345
 346         /********************  spin lock ********************/
 347         usbhs_lock(priv, flags);
 348
 349         pipe = usbhsh_uep_to_pipe(uep);
 350
 351         if (unlikely(!pipe)) {
 352                 dev_err(dev, "uep doens't have pipe\n");
 353         } else if (1 == uep->counter--) { /* last user */
 354                 struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
 355                 struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
 356
 357                 /* detach pipe from uep */
 358                 usbhsh_uep_to_pipe(uep)         = NULL;
 359                 usbhsh_pipe_to_uep(pipe)        = NULL;
 360
 361                 dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
 362                         usbhsh_device_number(hpriv, udev),
 363                         usb_endpoint_num(&ep->desc),
 364                         usbhs_pipe_name(pipe));
 365         }
 366
 367         usbhs_unlock(priv, flags);
 368         /********************  spin unlock ******************/
 369 }
 370
 371 /*
 372  *              endpoint control
 373  */
 374 static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
 375                                   struct urb *urb,
 376                                   gfp_t mem_flags)
 377 {
 378         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 379         struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
 380         struct usb_host_endpoint *ep = urb->ep;
 381         struct usbhsh_ep *uep;
 382         struct device *dev = usbhs_priv_to_dev(priv);
 383         struct usb_endpoint_descriptor *desc = &ep->desc;
 384         unsigned long flags;
 385
 386         uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
 387         if (!uep)
 388                 return -ENOMEM;
 389
 390         /********************  spin lock ********************/
 391         usbhs_lock(priv, flags);
 392
 393         /*
 394          * init endpoint
 395          */
 396         uep->counter = 0;
 397         INIT_LIST_HEAD(&uep->ep_list);
 398         list_add_tail(&uep->ep_list, &udev->ep_list_head);
 399
 400         usbhsh_uep_to_udev(uep) = udev;
 401         usbhsh_uep_to_ep(uep)   = ep;
 402         usbhsh_ep_to_uep(ep)    = uep;
 403
 404         usbhs_unlock(priv, flags);
 405         /********************  spin unlock ******************/
 406
 407         dev_dbg(dev, "%s [%d-%d]\n", __func__,
 408                 usbhsh_device_number(hpriv, udev),
 409                 usb_endpoint_num(desc));
 410
 411         return 0;
 412 }
 413
 414 static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
 415                                    struct usb_host_endpoint *ep)
 416 {
 417         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 418         struct device *dev = usbhs_priv_to_dev(priv);
 419         struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
 420         unsigned long flags;
 421
 422         if (!uep)
 423                 return;
 424
 425         dev_dbg(dev, "%s [%d-%d]\n", __func__,
 426                 usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
 427                 usb_endpoint_num(&ep->desc));
 428
 429         if (usbhsh_uep_to_pipe(uep))
 430                 usbhsh_pipe_detach(hpriv, uep);
 431
 432         /********************  spin lock ********************/
 433         usbhs_lock(priv, flags);
 434
 435         /* remove this endpoint from udev */
 436         list_del_init(&uep->ep_list);
 437
 438         usbhsh_uep_to_udev(uep) = NULL;
 439         usbhsh_uep_to_ep(uep)   = NULL;
 440         usbhsh_ep_to_uep(ep)    = NULL;
 441
 442         usbhs_unlock(priv, flags);
 443         /********************  spin unlock ******************/
 444
 445         kfree(uep);
 446 }
 447
 448 static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
 449                                        struct usbhsh_device *udev)
 450 {
 451         struct usbhsh_ep *uep, *next;
 452
 453         list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
 454                 usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
 455 }
 456
 457 /*
 458  *              device control
 459  */
 460 static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
 461                                      struct usbhsh_device *udev)
 462 {
 463         struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
 464
 465         return hcd->self.root_hub == usbv->parent;
 466 }
 467
 468 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
 469 {
 470         return !list_empty(&udev->ep_list_head);
 471 }
 472
 473 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
 474                                                struct urb *urb)
 475 {
 476         struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 477         struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 478
 479         /* usbhsh_device_attach() is still not called */
 480         if (!udev)
 481                 return NULL;
 482
 483         /* if it is device0, return it */
 484         if (0 == usb_pipedevice(urb->pipe))
 485                 return usbhsh_device0(hpriv);
 486
 487         /* return attached device */
 488         return udev;
 489 }
 490
 491 static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
 492                                                  struct urb *urb)
 493 {
 494         struct usbhsh_device *udev = NULL;
 495         struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
 496         struct usbhsh_device *pos;
 497         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 498         struct device *dev = usbhsh_hcd_to_dev(hcd);
 499         struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 500         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 501         unsigned long flags;
 502         u16 upphub, hubport;
 503         int i;
 504
 505         /*
 506          * This function should be called only while urb is pointing to device0.
 507          * It will attach unused usbhsh_device to urb (usbv),
 508          * and initialize device0.
 509          * You can use usbhsh_device_get() to get "current" udev,
 510          * and usbhsh_usbv_to_udev() is for "attached" udev.
 511          */
 512         if (0 != usb_pipedevice(urb->pipe)) {
 513                 dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
 514                 return NULL;
 515         }
 516
 517         /********************  spin lock ********************/
 518         usbhs_lock(priv, flags);
 519
 520         /*
 521          * find unused device
 522          */
 523         usbhsh_for_each_udev(pos, hpriv, i) {
 524                 if (usbhsh_udev_is_used(pos))
 525                         continue;
 526                 udev = pos;
 527                 break;
 528         }
 529
 530         if (udev) {
 531                 /*
 532                  * usbhsh_usbv_to_udev()
 533                  * usbhsh_udev_to_usbv()
 534                  * will be enable
 535                  */
 536                 dev_set_drvdata(&usbv->dev, udev);
 537                 udev->usbv = usbv;
 538         }
 539
 540         usbhs_unlock(priv, flags);
 541         /********************  spin unlock ******************/
 542
 543         if (!udev) {
 544                 dev_err(dev, "no free usbhsh_device\n");
 545                 return NULL;
 546         }
 547
 548         if (usbhsh_device_has_endpoint(udev)) {
 549                 dev_warn(dev, "udev have old endpoint\n");
 550                 usbhsh_endpoint_detach_all(hpriv, udev);
 551         }
 552
 553         if (usbhsh_device_has_endpoint(udev0)) {
 554                 dev_warn(dev, "udev0 have old endpoint\n");
 555                 usbhsh_endpoint_detach_all(hpriv, udev0);
 556         }
 557
 558         /* uep will be attached */
 559         INIT_LIST_HEAD(&udev0->ep_list_head);
 560         INIT_LIST_HEAD(&udev->ep_list_head);
 561
 562         /*
 563          * set device0 config
 564          */
 565         usbhs_set_device_config(priv,
 566                                 0, 0, 0, usbv->speed);
 567
 568         /*
 569          * set new device config
 570          */
 571         upphub  = 0;
 572         hubport = 0;
 573         if (!usbhsh_connected_to_rhdev(hcd, udev)) {
 574                 /* if udev is not connected to rhdev, it means parent is Hub */
 575                 struct usbhsh_device *parent = usbhsh_device_parent(udev);
 576
 577                 upphub  = usbhsh_device_number(hpriv, parent);
 578                 hubport = usbhsh_device_hubport(udev);
 579
 580                 dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__,
 581                         upphub, hubport, parent);
 582         }
 583
 584         usbhs_set_device_config(priv,
 585                                usbhsh_device_number(hpriv, udev),
 586                                upphub, hubport, usbv->speed);
 587
 588         dev_dbg(dev, "%s [%d](%p)\n", __func__,
 589                 usbhsh_device_number(hpriv, udev), udev);
 590
 591         return udev;
 592 }
 593
 594 static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
 595                                struct usbhsh_device *udev)
 596 {
 597         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 598         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 599         struct device *dev = usbhsh_hcd_to_dev(hcd);
 600         struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
 601         unsigned long flags;
 602
 603         dev_dbg(dev, "%s [%d](%p)\n", __func__,
 604                 usbhsh_device_number(hpriv, udev), udev);
 605
 606         if (usbhsh_device_has_endpoint(udev)) {
 607                 dev_warn(dev, "udev still have endpoint\n");
 608                 usbhsh_endpoint_detach_all(hpriv, udev);
 609         }
 610
 611         /*
 612          * There is nothing to do if it is device0.
 613          * see
 614          *  usbhsh_device_attach()
 615          *  usbhsh_device_get()
 616          */
 617         if (0 == usbhsh_device_number(hpriv, udev))
 618                 return;
 619
 620         /********************  spin lock ********************/
 621         usbhs_lock(priv, flags);
 622
 623         /*
 624          * usbhsh_usbv_to_udev()
 625          * usbhsh_udev_to_usbv()
 626          * will be disable
 627          */
 628         dev_set_drvdata(&usbv->dev, NULL);
 629         udev->usbv = NULL;
 630
 631         usbhs_unlock(priv, flags);
 632         /********************  spin unlock ******************/
 633 }
 634
 635 /*
 636  *              queue push/pop
 637  */
 638 static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
 639 {
 640         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 641         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 642         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 643         struct urb *urb = ureq->urb;
 644         struct device *dev = usbhs_priv_to_dev(priv);
 645         int status = 0;
 646
 647         dev_dbg(dev, "%s\n", __func__);
 648
 649         if (!urb) {
 650                 dev_warn(dev, "pkt doesn't have urb\n");
 651                 return;
 652         }
 653
 654         if (!usbhsh_is_running(hpriv))
 655                 status = -ESHUTDOWN;
 656
 657         urb->actual_length = pkt->actual;
 658
 659         usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
 660         usbhsh_ureq_free(hpriv, ureq);
 661
 662         usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep));
 663
 664         usb_hcd_unlink_urb_from_ep(hcd, urb);
 665         usb_hcd_giveback_urb(hcd, urb, status);
 666 }
 667
 668 static int usbhsh_queue_push(struct usb_hcd *hcd,
 669                              struct urb *urb,
 670                              gfp_t mem_flags)
 671 {
 672         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 673         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 674         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 675         struct device *dev = usbhsh_hcd_to_dev(hcd);
 676         struct usbhsh_request *ureq;
 677         void *buf;
 678         int len, sequence;
 679
 680         if (usb_pipeisoc(urb->pipe)) {
 681                 dev_err(dev, "pipe iso is not supported now\n");
 682                 return -EIO;
 683         }
 684
 685         /* this ureq will be freed on usbhsh_queue_done() */
 686         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 687         if (unlikely(!ureq)) {
 688                 dev_err(dev, "ureq alloc fail\n");
 689                 return -ENOMEM;
 690         }
 691
 692         if (usb_pipein(urb->pipe))
 693                 pipe->handler = &usbhs_fifo_dma_pop_handler;
 694         else
 695                 pipe->handler = &usbhs_fifo_dma_push_handler;
 696
 697         buf = (void *)(urb->transfer_buffer + urb->actual_length);
 698         len = urb->transfer_buffer_length - urb->actual_length;
 699
 700         sequence = usb_gettoggle(urb->dev,
 701                                  usb_pipeendpoint(urb->pipe),
 702                                  usb_pipeout(urb->pipe));
 703
 704         dev_dbg(dev, "%s\n", __func__);
 705         usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
 706                        buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
 707                        sequence);
 708
 709         usbhs_pkt_start(pipe);
 710
 711         return 0;
 712 }
 713
 714 static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
 715                                    struct usbhs_pipe *pipe)
 716 {
 717         struct usbhs_pkt *pkt;
 718
 719         while (1) {
 720                 pkt = usbhs_pkt_pop(pipe, NULL);
 721                 if (!pkt)
 722                         break;
 723
 724                 /*
 725                  * if all packet are gone, usbhsh_endpoint_disable()
 726                  * will be called.
 727                  * then, attached device/endpoint/pipe will be detached
 728                  */
 729                 usbhsh_queue_done(priv, pkt);
 730         }
 731 }
 732
 733 static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
 734 {
 735         struct usbhs_pipe *pos;
 736         int i;
 737
 738         usbhs_for_each_pipe_with_dcp(pos, priv, i)
 739                 usbhsh_queue_force_pop(priv, pos);
 740 }
 741
 742 /*
 743  *              DCP setup stage
 744  */
 745 static int usbhsh_is_request_address(struct urb *urb)
 746 {
 747         struct usb_ctrlrequest *req;
 748
 749         req = (struct usb_ctrlrequest *)urb->setup_packet;
 750
 751         if ((DeviceOutRequest    == req->bRequestType << 8) &&
 752             (USB_REQ_SET_ADDRESS == req->bRequest))
 753                 return 1;
 754         else
 755                 return 0;
 756 }
 757
 758 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
 759                                            struct urb *urb,
 760                                            struct usbhs_pipe *pipe)
 761 {
 762         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 763         struct usb_ctrlrequest req;
 764         struct device *dev = usbhs_priv_to_dev(priv);
 765
 766         /*
 767          * wait setup packet ACK
 768          * see
 769          *      usbhsh_irq_setup_ack()
 770          *      usbhsh_irq_setup_err()
 771          */
 772         init_completion(&hpriv->setup_ack_done);
 773
 774         /* copy original request */
 775         memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
 776
 777         /*
 778          * renesas_usbhs can not use original usb address.
 779          * see HARDWARE LIMITATION.
 780          * modify usb address here to use attached device.
 781          * see usbhsh_device_attach()
 782          */
 783         if (usbhsh_is_request_address(urb)) {
 784                 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 785                 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 786
 787                 /* udev is a attached device */
 788                 req.wValue = usbhsh_device_number(hpriv, udev);
 789                 dev_dbg(dev, "create new address - %d\n", req.wValue);
 790         }
 791
 792         /* set request */
 793         usbhs_usbreq_set_val(priv, &req);
 794
 795         /*
 796          * wait setup packet ACK
 797          */
 798         wait_for_completion(&hpriv->setup_ack_done);
 799
 800         dev_dbg(dev, "%s done\n", __func__);
 801 }
 802
 803 /*
 804  *              DCP data stage
 805  */
 806 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
 807                                           struct usbhs_pkt *pkt)
 808 {
 809         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 810         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 811
 812         /* this ureq was connected to urb when usbhsh_urb_enqueue()  */
 813
 814         usbhsh_ureq_free(hpriv, ureq);
 815 }
 816
 817 static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
 818                                          struct urb *urb,
 819                                          struct usbhs_pipe *pipe,
 820                                          gfp_t mem_flags)
 821
 822 {
 823         struct usbhsh_request *ureq;
 824
 825         /* this ureq will be freed on usbhsh_data_stage_packet_done() */
 826         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 827         if (unlikely(!ureq))
 828                 return -ENOMEM;
 829
 830         if (usb_pipein(urb->pipe))
 831                 pipe->handler = &usbhs_dcp_data_stage_in_handler;
 832         else
 833                 pipe->handler = &usbhs_dcp_data_stage_out_handler;
 834
 835         usbhs_pkt_push(pipe, &ureq->pkt,
 836                        usbhsh_data_stage_packet_done,
 837                        urb->transfer_buffer,
 838                        urb->transfer_buffer_length,
 839                        (urb->transfer_flags & URB_ZERO_PACKET),
 840                        -1);
 841
 842         return 0;
 843 }
 844
 845 /*
 846  *              DCP status stage
 847  */
 848 static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
 849                                             struct urb *urb,
 850                                             struct usbhs_pipe *pipe,
 851                                             gfp_t mem_flags)
 852 {
 853         struct usbhsh_request *ureq;
 854
 855         /* This ureq will be freed on usbhsh_queue_done() */
 856         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 857         if (unlikely(!ureq))
 858                 return -ENOMEM;
 859
 860         if (usb_pipein(urb->pipe))
 861                 pipe->handler = &usbhs_dcp_status_stage_in_handler;
 862         else
 863                 pipe->handler = &usbhs_dcp_status_stage_out_handler;
 864
 865         usbhs_pkt_push(pipe, &ureq->pkt,
 866                        usbhsh_queue_done,
 867                        NULL,
 868                        urb->transfer_buffer_length,
 869                        0, -1);
 870
 871         return 0;
 872 }
 873
 874 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
 875                                  struct urb *urb,
 876                                  gfp_t mflags)
 877 {
 878         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 879         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 880         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 881         struct device *dev = usbhsh_hcd_to_dev(hcd);
 882         int ret;
 883
 884         dev_dbg(dev, "%s\n", __func__);
 885
 886         /*
 887          * setup stage
 888          *
 889          * usbhsh_send_setup_stage_packet() wait SACK/SIGN
 890          */
 891         usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
 892
 893         /*
 894          * data stage
 895          *
 896          * It is pushed only when urb has buffer.
 897          */
 898         if (urb->transfer_buffer_length) {
 899                 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
 900                 if (ret < 0) {
 901                         dev_err(dev, "data stage failed\n");
 902                         return ret;
 903                 }
 904         }
 905
 906         /*
 907          * status stage
 908          */
 909         ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
 910         if (ret < 0) {
 911                 dev_err(dev, "status stage failed\n");
 912                 return ret;
 913         }
 914
 915         /*
 916          * start pushed packets
 917          */
 918         usbhs_pkt_start(pipe);
 919
 920         return 0;
 921 }
 922
 923 /*
 924  *              dma map functions
 925  */
 926 static int usbhsh_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
 927                                int map)
 928 {
 929         if (map) {
 930                 struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 931                 struct urb *urb = ureq->urb;
 932
 933                 /* it can not use scatter/gather */
 934                 if (urb->num_sgs)
 935                         return -EINVAL;
 936
 937                 pkt->dma = urb->transfer_dma;
 938                 if (!pkt->dma)
 939                         return -EINVAL;
 940         }
 941
 942         return 0;
 943 }
 944
 945 /*
 946  *              for hc_driver
 947  */
 948 static int usbhsh_host_start(struct usb_hcd *hcd)
 949 {
 950         return 0;
 951 }
 952
 953 static void usbhsh_host_stop(struct usb_hcd *hcd)
 954 {
 955 }
 956
 957 static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
 958                               struct urb *urb,
 959                               gfp_t mem_flags)
 960 {
 961         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 962         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 963         struct device *dev = usbhs_priv_to_dev(priv);
 964         struct usb_host_endpoint *ep = urb->ep;
 965         struct usbhsh_device *new_udev = NULL;
 966         int is_dir_in = usb_pipein(urb->pipe);
 967         int ret;
 968
 969         dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
 970
 971         if (!usbhsh_is_running(hpriv)) {
 972                 ret = -EIO;
 973                 dev_err(dev, "host is not running\n");
 974                 goto usbhsh_urb_enqueue_error_not_linked;
 975         }
 976
 977         ret = usb_hcd_link_urb_to_ep(hcd, urb);
 978         if (ret) {
 979                 dev_err(dev, "urb link failed\n");
 980                 goto usbhsh_urb_enqueue_error_not_linked;
 981         }
 982
 983         /*
 984          * attach udev if needed
 985          * see [image of mod_host]
 986          */
 987         if (!usbhsh_device_get(hpriv, urb)) {
 988                 new_udev = usbhsh_device_attach(hpriv, urb);
 989                 if (!new_udev) {
 990                         ret = -EIO;
 991                         dev_err(dev, "device attach failed\n");
 992                         goto usbhsh_urb_enqueue_error_not_linked;
 993                 }
 994         }
 995
 996         /*
 997          * attach endpoint if needed
 998          * see [image of mod_host]
 999          */
1000         if (!usbhsh_ep_to_uep(ep)) {
1001                 ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
1002                 if (ret < 0) {
1003                         dev_err(dev, "endpoint attach failed\n");
1004                         goto usbhsh_urb_enqueue_error_free_device;
1005                 }
1006         }
1007
1008         /*
1009          * attach pipe to endpoint
1010          * see [image of mod_host]
1011          */
1012         ret = usbhsh_pipe_attach(hpriv, urb);
1013         if (ret < 0) {
1014                 dev_err(dev, "pipe attach failed\n");
1015                 goto usbhsh_urb_enqueue_error_free_endpoint;
1016         }
1017
1018         /*
1019          * push packet
1020          */
1021         if (usb_pipecontrol(urb->pipe))
1022                 ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1023         else
1024                 ret = usbhsh_queue_push(hcd, urb, mem_flags);
1025
1026         return ret;
1027
1028 usbhsh_urb_enqueue_error_free_endpoint:
1029         usbhsh_endpoint_detach(hpriv, ep);
1030 usbhsh_urb_enqueue_error_free_device:
1031         if (new_udev)
1032                 usbhsh_device_detach(hpriv, new_udev);
1033 usbhsh_urb_enqueue_error_not_linked:
1034
1035         dev_dbg(dev, "%s error\n", __func__);
1036
1037         return ret;
1038 }
1039
1040 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1041 {
1042         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1043         struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1044
1045         if (ureq) {
1046                 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1047                 struct usbhs_pkt *pkt = &ureq->pkt;
1048
1049                 usbhs_pkt_pop(pkt->pipe, pkt);
1050                 usbhsh_queue_done(priv, pkt);
1051         }
1052
1053         return 0;
1054 }
1055
1056 static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1057                                     struct usb_host_endpoint *ep)
1058 {
1059         struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1060         struct usbhsh_device *udev;
1061         struct usbhsh_hpriv *hpriv;
1062
1063         /*
1064          * this function might be called manytimes by same hcd/ep
1065          * in-endpoint == out-endpoint if ep == dcp.
1066          */
1067         if (!uep)
1068                 return;
1069
1070         udev    = usbhsh_uep_to_udev(uep);
1071         hpriv   = usbhsh_hcd_to_hpriv(hcd);
1072
1073         usbhsh_endpoint_detach(hpriv, ep);
1074
1075         /*
1076          * if there is no endpoint,
1077          * free device
1078          */
1079         if (!usbhsh_device_has_endpoint(udev))
1080                 usbhsh_device_detach(hpriv, udev);
1081 }
1082
1083 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1084 {
1085         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1086         int roothub_id = 1; /* only 1 root hub */
1087
1088         /*
1089          * does port stat was changed ?
1090          * check USB_PORT_STAT_C_xxx << 16
1091          */
1092         if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
1093                 *buf = (1 << roothub_id);
1094         else
1095                 *buf = 0;
1096
1097         return !!(*buf);
1098 }
1099
1100 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1101                                     u16 typeReq, u16 wValue,
1102                                     u16 wIndex, char *buf, u16 wLength)
1103 {
1104         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1105         struct device *dev = usbhs_priv_to_dev(priv);
1106
1107         switch (wValue) {
1108         case C_HUB_OVER_CURRENT:
1109         case C_HUB_LOCAL_POWER:
1110                 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1111                 return 0;
1112         }
1113
1114         return -EPIPE;
1115 }
1116
1117 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1118                                      u16 typeReq, u16 wValue,
1119                                      u16 wIndex, char *buf, u16 wLength)
1120 {
1121         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1122         struct device *dev = usbhs_priv_to_dev(priv);
1123         int enable = (typeReq == SetPortFeature);
1124         int speed, i, timeout = 128;
1125         int roothub_id = 1; /* only 1 root hub */
1126
1127         /* common error */
1128         if (wIndex > roothub_id || wLength != 0)
1129                 return -EPIPE;
1130
1131         /* check wValue */
1132         switch (wValue) {
1133         case USB_PORT_FEAT_POWER:
1134                 usbhs_vbus_ctrl(priv, enable);
1135                 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1136                 break;
1137
1138         case USB_PORT_FEAT_ENABLE:
1139         case USB_PORT_FEAT_SUSPEND:
1140         case USB_PORT_FEAT_C_ENABLE:
1141         case USB_PORT_FEAT_C_SUSPEND:
1142         case USB_PORT_FEAT_C_CONNECTION:
1143         case USB_PORT_FEAT_C_OVER_CURRENT:
1144         case USB_PORT_FEAT_C_RESET:
1145                 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1146                 break;
1147
1148         case USB_PORT_FEAT_RESET:
1149                 if (!enable)
1150                         break;
1151
1152                 usbhsh_port_stat_clear(hpriv,
1153                                        USB_PORT_STAT_HIGH_SPEED |
1154                                        USB_PORT_STAT_LOW_SPEED);
1155
1156                 usbhsh_queue_force_pop_all(priv);
1157
1158                 usbhs_bus_send_reset(priv);
1159                 msleep(20);
1160                 usbhs_bus_send_sof_enable(priv);
1161
1162                 for (i = 0; i < timeout ; i++) {
1163                         switch (usbhs_bus_get_speed(priv)) {
1164                         case USB_SPEED_LOW:
1165                                 speed = USB_PORT_STAT_LOW_SPEED;
1166                                 goto got_usb_bus_speed;
1167                         case USB_SPEED_HIGH:
1168                                 speed = USB_PORT_STAT_HIGH_SPEED;
1169                                 goto got_usb_bus_speed;
1170                         case USB_SPEED_FULL:
1171                                 speed = 0;
1172                                 goto got_usb_bus_speed;
1173                         }
1174
1175                         msleep(20);
1176                 }
1177                 return -EPIPE;
1178
1179 got_usb_bus_speed:
1180                 usbhsh_port_stat_set(hpriv, speed);
1181                 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1182
1183                 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1184                         __func__, speed);
1185
1186                 /* status change is not needed */
1187                 return 0;
1188
1189         default:
1190                 return -EPIPE;
1191         }
1192
1193         /* set/clear status */
1194         if (enable)
1195                 usbhsh_port_stat_set(hpriv, (1 << wValue));
1196         else
1197                 usbhsh_port_stat_clear(hpriv, (1 << wValue));
1198
1199         return 0;
1200 }
1201
1202 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1203                                    u16 typeReq, u16 wValue,
1204                                    u16 wIndex, char *buf, u16 wLength)
1205 {
1206         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1207         struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1208         struct device *dev = usbhs_priv_to_dev(priv);
1209         int roothub_id = 1; /* only 1 root hub */
1210
1211         switch (typeReq) {
1212         case GetHubStatus:
1213                 dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1214
1215                 *buf = 0x00;
1216                 break;
1217
1218         case GetPortStatus:
1219                 if (wIndex != roothub_id)
1220                         return -EPIPE;
1221
1222                 dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1223                 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1224                 break;
1225
1226         case GetHubDescriptor:
1227                 desc->bDescriptorType           = USB_DT_HUB;
1228                 desc->bHubContrCurrent          = 0;
1229                 desc->bNbrPorts                 = roothub_id;
1230                 desc->bDescLength               = 9;
1231                 desc->bPwrOn2PwrGood            = 0;
1232                 desc->wHubCharacteristics       =
1233                         cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM);
1234                 desc->u.hs.DeviceRemovable[0]   = (roothub_id << 1);
1235                 desc->u.hs.DeviceRemovable[1]   = ~0;
1236                 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1237                 break;
1238         }
1239
1240         return 0;
1241 }
1242
1243 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1244                               u16 wIndex, char *buf, u16 wLength)
1245 {
1246         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1247         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1248         struct device *dev = usbhs_priv_to_dev(priv);
1249         int ret = -EPIPE;
1250
1251         switch (typeReq) {
1252
1253         /* Hub Feature */
1254         case ClearHubFeature:
1255         case SetHubFeature:
1256                 ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1257                                                wValue, wIndex, buf, wLength);
1258                 break;
1259
1260         /* Port Feature */
1261         case SetPortFeature:
1262         case ClearPortFeature:
1263                 ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1264                                                 wValue, wIndex, buf, wLength);
1265                 break;
1266
1267         /* Get status */
1268         case GetHubStatus:
1269         case GetPortStatus:
1270         case GetHubDescriptor:
1271                 ret = __usbhsh_hub_get_status(hpriv, typeReq,
1272                                               wValue, wIndex, buf, wLength);
1273                 break;
1274         }
1275
1276         dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1277                 typeReq, ret, usbhsh_port_stat_get(hpriv));
1278
1279         return ret;
1280 }
1281
1282 static int usbhsh_bus_nop(struct usb_hcd *hcd)
1283 {
1284         /* nothing to do */
1285         return 0;
1286 }
1287
1288 static struct hc_driver usbhsh_driver = {
1289         .description =          usbhsh_hcd_name,
1290         .hcd_priv_size =        sizeof(struct usbhsh_hpriv),
1291
1292         /*
1293          * generic hardware linkage
1294          */
1295         .flags =                HCD_USB2,
1296
1297         .start =                usbhsh_host_start,
1298         .stop =                 usbhsh_host_stop,
1299
1300         /*
1301          * managing i/o requests and associated device resources
1302          */
1303         .urb_enqueue =          usbhsh_urb_enqueue,
1304         .urb_dequeue =          usbhsh_urb_dequeue,
1305         .endpoint_disable =     usbhsh_endpoint_disable,
1306
1307         /*
1308          * root hub
1309          */
1310         .hub_status_data =      usbhsh_hub_status_data,
1311         .hub_control =          usbhsh_hub_control,
1312         .bus_suspend =          usbhsh_bus_nop,
1313         .bus_resume =           usbhsh_bus_nop,
1314 };
1315
1316 /*
1317  *              interrupt functions
1318  */
1319 static int usbhsh_irq_attch(struct usbhs_priv *priv,
1320                             struct usbhs_irq_state *irq_state)
1321 {
1322         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1323         struct device *dev = usbhs_priv_to_dev(priv);
1324
1325         dev_dbg(dev, "device attached\n");
1326
1327         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1328         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1329
1330         /*
1331          * attch interrupt might happen infinitely on some device
1332          * (on self power USB hub ?)
1333          * disable it here.
1334          *
1335          * usbhsh_is_running() becomes effective
1336          * according to this process.
1337          * see
1338          *      usbhsh_is_running()
1339          *      usbhsh_urb_enqueue()
1340          */
1341         hpriv->mod.irq_attch = NULL;
1342         usbhs_irq_callback_update(priv, &hpriv->mod);
1343
1344         return 0;
1345 }
1346
1347 static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1348                            struct usbhs_irq_state *irq_state)
1349 {
1350         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1351         struct device *dev = usbhs_priv_to_dev(priv);
1352
1353         dev_dbg(dev, "device detached\n");
1354
1355         usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1356         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1357
1358         /*
1359          * enable attch interrupt again
1360          *
1361          * usbhsh_is_running() becomes invalid
1362          * according to this process.
1363          * see
1364          *      usbhsh_is_running()
1365          *      usbhsh_urb_enqueue()
1366          */
1367         hpriv->mod.irq_attch = usbhsh_irq_attch;
1368         usbhs_irq_callback_update(priv, &hpriv->mod);
1369
1370         /*
1371          * usbhsh_queue_force_pop_all() should be called
1372          * after usbhsh_is_running() becomes invalid.
1373          */
1374         usbhsh_queue_force_pop_all(priv);
1375
1376         return 0;
1377 }
1378
1379 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1380                                 struct usbhs_irq_state *irq_state)
1381 {
1382         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1383         struct device *dev = usbhs_priv_to_dev(priv);
1384
1385         dev_dbg(dev, "setup packet OK\n");
1386
1387         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1388
1389         return 0;
1390 }
1391
1392 static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1393                                 struct usbhs_irq_state *irq_state)
1394 {
1395         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1396         struct device *dev = usbhs_priv_to_dev(priv);
1397
1398         dev_dbg(dev, "setup packet Err\n");
1399
1400         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1401
1402         return 0;
1403 }
1404
1405 /*
1406  *              module start/stop
1407  */
1408 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1409 {
1410         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1411         struct usbhs_pipe *pipe;
1412         struct renesas_usbhs_driver_pipe_config *pipe_configs =
1413                                         usbhs_get_dparam(priv, pipe_configs);
1414         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1415         int old_type, dir_in, i;
1416
1417         /* init all pipe */
1418         old_type = USB_ENDPOINT_XFER_CONTROL;
1419         for (i = 0; i < pipe_size; i++) {
1420
1421                 /*
1422                  * data "output" will be finished as soon as possible,
1423                  * but there is no guaranty at data "input" case.
1424                  *
1425                  * "input" needs "standby" pipe.
1426                  * So, "input" direction pipe > "output" direction pipe
1427                  * is good idea.
1428                  *
1429                  * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1430                  * and the other will be input direction here.
1431                  *
1432                  * ex)
1433                  * ...
1434                  * USB_ENDPOINT_XFER_ISOC -> dir out
1435                  * USB_ENDPOINT_XFER_ISOC -> dir in
1436                  * USB_ENDPOINT_XFER_BULK -> dir out
1437                  * USB_ENDPOINT_XFER_BULK -> dir in
1438                  * USB_ENDPOINT_XFER_BULK -> dir in
1439                  * ...
1440                  */
1441                 dir_in = (pipe_configs[i].type == old_type);
1442                 old_type = pipe_configs[i].type;
1443
1444                 if (USB_ENDPOINT_XFER_CONTROL == pipe_configs[i].type) {
1445                         pipe = usbhs_dcp_malloc(priv);
1446                         usbhsh_hpriv_to_dcp(hpriv) = pipe;
1447                 } else {
1448                         pipe = usbhs_pipe_malloc(priv,
1449                                                  pipe_configs[i].type,
1450                                                  dir_in);
1451                 }
1452
1453                 pipe->mod_private = NULL;
1454         }
1455 }
1456
1457 static int usbhsh_start(struct usbhs_priv *priv)
1458 {
1459         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1460         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1461         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1462         struct device *dev = usbhs_priv_to_dev(priv);
1463         int ret;
1464
1465         /* add hcd */
1466         ret = usb_add_hcd(hcd, 0, 0);
1467         if (ret < 0)
1468                 return 0;
1469         device_wakeup_enable(hcd->self.controller);
1470
1471         /*
1472          * pipe initialize and enable DCP
1473          */
1474         usbhs_fifo_init(priv);
1475         usbhs_pipe_init(priv,
1476                         usbhsh_dma_map_ctrl);
1477         usbhsh_pipe_init_for_host(priv);
1478
1479         /*
1480          * system config enble
1481          * - HI speed
1482          * - host
1483          * - usb module
1484          */
1485         usbhs_sys_host_ctrl(priv, 1);
1486
1487         /*
1488          * enable irq callback
1489          */
1490         mod->irq_attch          = usbhsh_irq_attch;
1491         mod->irq_dtch           = usbhsh_irq_dtch;
1492         mod->irq_sack           = usbhsh_irq_setup_ack;
1493         mod->irq_sign           = usbhsh_irq_setup_err;
1494         usbhs_irq_callback_update(priv, mod);
1495
1496         dev_dbg(dev, "start host\n");
1497
1498         return ret;
1499 }
1500
1501 static int usbhsh_stop(struct usbhs_priv *priv)
1502 {
1503         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1504         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1505         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1506         struct device *dev = usbhs_priv_to_dev(priv);
1507
1508         /*
1509          * disable irq callback
1510          */
1511         mod->irq_attch  = NULL;
1512         mod->irq_dtch   = NULL;
1513         mod->irq_sack   = NULL;
1514         mod->irq_sign   = NULL;
1515         usbhs_irq_callback_update(priv, mod);
1516
1517         usb_remove_hcd(hcd);
1518
1519         /* disable sys */
1520         usbhs_sys_host_ctrl(priv, 0);
1521
1522         dev_dbg(dev, "quit host\n");
1523
1524         return 0;
1525 }
1526
1527 int usbhs_mod_host_probe(struct usbhs_priv *priv)
1528 {
1529         struct usbhsh_hpriv *hpriv;
1530         struct usb_hcd *hcd;
1531         struct usbhsh_device *udev;
1532         struct device *dev = usbhs_priv_to_dev(priv);
1533         int i;
1534
1535         /* initialize hcd */
1536         hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1537         if (!hcd) {
1538                 dev_err(dev, "Failed to create hcd\n");
1539                 return -ENOMEM;
1540         }
1541         hcd->has_tt = 1; /* for low/full speed */
1542
1543         /*
1544          * CAUTION
1545          *
1546          * There is no guarantee that it is possible to access usb module here.
1547          * Don't accesses to it.
1548          * The accesse will be enable after "usbhsh_start"
1549          */
1550
1551         hpriv = usbhsh_hcd_to_hpriv(hcd);
1552
1553         /*
1554          * register itself
1555          */
1556         usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1557
1558         /* init hpriv */
1559         hpriv->mod.name         = "host";
1560         hpriv->mod.start        = usbhsh_start;
1561         hpriv->mod.stop         = usbhsh_stop;
1562         usbhsh_port_stat_init(hpriv);
1563
1564         /* init all device */
1565         usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1566                 udev->usbv      = NULL;
1567                 INIT_LIST_HEAD(&udev->ep_list_head);
1568         }
1569
1570         dev_info(dev, "host probed\n");
1571
1572         return 0;
1573 }
1574
1575 int usbhs_mod_host_remove(struct usbhs_priv *priv)
1576 {
1577         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1578         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1579
1580         usb_put_hcd(hcd);
1581
1582         return 0;
1583 }