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 device *dev = usbhs_priv_to_dev(priv);
 637         int status = 0;
 638
 639         dev_dbg(dev, "%s\n", __func__);
 640
 641         if (!urb) {
 642                 dev_warn(dev, "pkt doesn't have urb\n");
 643                 return;
 644         }
 645
 646         if (!usbhsh_is_running(hpriv))
 647                 status = -ESHUTDOWN;
 648
 649         urb->actual_length = pkt->actual;
 650         usbhsh_ureq_free(hpriv, ureq);
 651
 652         usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
 653         usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep));
 654
 655         usb_hcd_unlink_urb_from_ep(hcd, urb);
 656         usb_hcd_giveback_urb(hcd, urb, status);
 657 }
 658
 659 static int usbhsh_queue_push(struct usb_hcd *hcd,
 660                              struct urb *urb,
 661                              gfp_t mem_flags)
 662 {
 663         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 664         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 665         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 666         struct device *dev = usbhsh_hcd_to_dev(hcd);
 667         struct usbhsh_request *ureq;
 668         void *buf;
 669         int len, sequence;
 670
 671         if (usb_pipeisoc(urb->pipe)) {
 672                 dev_err(dev, "pipe iso is not supported now\n");
 673                 return -EIO;
 674         }
 675
 676         /* this ureq will be freed on usbhsh_queue_done() */
 677         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 678         if (unlikely(!ureq)) {
 679                 dev_err(dev, "ureq alloc fail\n");
 680                 return -ENOMEM;
 681         }
 682
 683         if (usb_pipein(urb->pipe))
 684                 pipe->handler = &usbhs_fifo_pio_pop_handler;
 685         else
 686                 pipe->handler = &usbhs_fifo_pio_push_handler;
 687
 688         buf = (void *)(urb->transfer_buffer + urb->actual_length);
 689         len = urb->transfer_buffer_length - urb->actual_length;
 690
 691         sequence = usb_gettoggle(urb->dev,
 692                                  usb_pipeendpoint(urb->pipe),
 693                                  usb_pipeout(urb->pipe));
 694
 695         dev_dbg(dev, "%s\n", __func__);
 696         usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
 697                        buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
 698                        sequence);
 699
 700         usbhs_pkt_start(pipe);
 701
 702         return 0;
 703 }
 704
 705 static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
 706                                    struct usbhs_pipe *pipe)
 707 {
 708         struct usbhs_pkt *pkt;
 709
 710         while (1) {
 711                 pkt = usbhs_pkt_pop(pipe, NULL);
 712                 if (!pkt)
 713                         break;
 714
 715                 /*
 716                  * if all packet are gone, usbhsh_endpoint_disable()
 717                  * will be called.
 718                  * then, attached device/endpoint/pipe will be detached
 719                  */
 720                 usbhsh_queue_done(priv, pkt);
 721         }
 722 }
 723
 724 static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
 725 {
 726         struct usbhs_pipe *pos;
 727         int i;
 728
 729         usbhs_for_each_pipe_with_dcp(pos, priv, i)
 730                 usbhsh_queue_force_pop(priv, pos);
 731 }
 732
 733 /*
 734  *              DCP setup stage
 735  */
 736 static int usbhsh_is_request_address(struct urb *urb)
 737 {
 738         struct usb_ctrlrequest *req;
 739
 740         req = (struct usb_ctrlrequest *)urb->setup_packet;
 741
 742         if ((DeviceOutRequest    == req->bRequestType << 8) &&
 743             (USB_REQ_SET_ADDRESS == req->bRequest))
 744                 return 1;
 745         else
 746                 return 0;
 747 }
 748
 749 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
 750                                            struct urb *urb,
 751                                            struct usbhs_pipe *pipe)
 752 {
 753         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 754         struct usb_ctrlrequest req;
 755         struct device *dev = usbhs_priv_to_dev(priv);
 756
 757         /*
 758          * wait setup packet ACK
 759          * see
 760          *      usbhsh_irq_setup_ack()
 761          *      usbhsh_irq_setup_err()
 762          */
 763         init_completion(&hpriv->setup_ack_done);
 764
 765         /* copy original request */
 766         memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
 767
 768         /*
 769          * renesas_usbhs can not use original usb address.
 770          * see HARDWARE LIMITATION.
 771          * modify usb address here to use attached device.
 772          * see usbhsh_device_attach()
 773          */
 774         if (usbhsh_is_request_address(urb)) {
 775                 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 776                 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 777
 778                 /* udev is a attached device */
 779                 req.wValue = usbhsh_device_number(hpriv, udev);
 780                 dev_dbg(dev, "create new address - %d\n", req.wValue);
 781         }
 782
 783         /* set request */
 784         usbhs_usbreq_set_val(priv, &req);
 785
 786         /*
 787          * wait setup packet ACK
 788          */
 789         wait_for_completion(&hpriv->setup_ack_done);
 790
 791         dev_dbg(dev, "%s done\n", __func__);
 792 }
 793
 794 /*
 795  *              DCP data stage
 796  */
 797 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
 798                                           struct usbhs_pkt *pkt)
 799 {
 800         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 801         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 802
 803         /* this ureq was connected to urb when usbhsh_urb_enqueue()  */
 804
 805         usbhsh_ureq_free(hpriv, ureq);
 806 }
 807
 808 static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
 809                                          struct urb *urb,
 810                                          struct usbhs_pipe *pipe,
 811                                          gfp_t mem_flags)
 812
 813 {
 814         struct usbhsh_request *ureq;
 815
 816         /* this ureq will be freed on usbhsh_data_stage_packet_done() */
 817         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 818         if (unlikely(!ureq))
 819                 return -ENOMEM;
 820
 821         if (usb_pipein(urb->pipe))
 822                 pipe->handler = &usbhs_dcp_data_stage_in_handler;
 823         else
 824                 pipe->handler = &usbhs_dcp_data_stage_out_handler;
 825
 826         usbhs_pkt_push(pipe, &ureq->pkt,
 827                        usbhsh_data_stage_packet_done,
 828                        urb->transfer_buffer,
 829                        urb->transfer_buffer_length,
 830                        (urb->transfer_flags & URB_ZERO_PACKET),
 831                        -1);
 832
 833         return 0;
 834 }
 835
 836 /*
 837  *              DCP status stage
 838  */
 839 static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
 840                                             struct urb *urb,
 841                                             struct usbhs_pipe *pipe,
 842                                             gfp_t mem_flags)
 843 {
 844         struct usbhsh_request *ureq;
 845
 846         /* This ureq will be freed on usbhsh_queue_done() */
 847         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 848         if (unlikely(!ureq))
 849                 return -ENOMEM;
 850
 851         if (usb_pipein(urb->pipe))
 852                 pipe->handler = &usbhs_dcp_status_stage_in_handler;
 853         else
 854                 pipe->handler = &usbhs_dcp_status_stage_out_handler;
 855
 856         usbhs_pkt_push(pipe, &ureq->pkt,
 857                        usbhsh_queue_done,
 858                        NULL,
 859                        urb->transfer_buffer_length,
 860                        0, -1);
 861
 862         return 0;
 863 }
 864
 865 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
 866                                  struct urb *urb,
 867                                  gfp_t mflags)
 868 {
 869         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 870         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 871         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 872         struct device *dev = usbhsh_hcd_to_dev(hcd);
 873         int ret;
 874
 875         dev_dbg(dev, "%s\n", __func__);
 876
 877         /*
 878          * setup stage
 879          *
 880          * usbhsh_send_setup_stage_packet() wait SACK/SIGN
 881          */
 882         usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
 883
 884         /*
 885          * data stage
 886          *
 887          * It is pushed only when urb has buffer.
 888          */
 889         if (urb->transfer_buffer_length) {
 890                 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
 891                 if (ret < 0) {
 892                         dev_err(dev, "data stage failed\n");
 893                         return ret;
 894                 }
 895         }
 896
 897         /*
 898          * status stage
 899          */
 900         ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
 901         if (ret < 0) {
 902                 dev_err(dev, "status stage failed\n");
 903                 return ret;
 904         }
 905
 906         /*
 907          * start pushed packets
 908          */
 909         usbhs_pkt_start(pipe);
 910
 911         return 0;
 912 }
 913
 914 /*
 915  *              dma map functions
 916  */
 917 static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
 918 {
 919         return 0;
 920 }
 921
 922 /*
 923  *              for hc_driver
 924  */
 925 static int usbhsh_host_start(struct usb_hcd *hcd)
 926 {
 927         return 0;
 928 }
 929
 930 static void usbhsh_host_stop(struct usb_hcd *hcd)
 931 {
 932 }
 933
 934 static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
 935                               struct urb *urb,
 936                               gfp_t mem_flags)
 937 {
 938         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 939         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 940         struct device *dev = usbhs_priv_to_dev(priv);
 941         struct usb_host_endpoint *ep = urb->ep;
 942         struct usbhsh_device *new_udev = NULL;
 943         int is_dir_in = usb_pipein(urb->pipe);
 944         int i;
 945         int ret;
 946
 947         dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
 948
 949         if (!usbhsh_is_running(hpriv)) {
 950                 ret = -EIO;
 951                 dev_err(dev, "host is not running\n");
 952                 goto usbhsh_urb_enqueue_error_not_linked;
 953         }
 954
 955         ret = usb_hcd_link_urb_to_ep(hcd, urb);
 956         if (ret) {
 957                 dev_err(dev, "urb link failed\n");
 958                 goto usbhsh_urb_enqueue_error_not_linked;
 959         }
 960
 961         /*
 962          * attach udev if needed
 963          * see [image of mod_host]
 964          */
 965         if (!usbhsh_device_get(hpriv, urb)) {
 966                 new_udev = usbhsh_device_attach(hpriv, urb);
 967                 if (!new_udev) {
 968                         ret = -EIO;
 969                         dev_err(dev, "device attach failed\n");
 970                         goto usbhsh_urb_enqueue_error_not_linked;
 971                 }
 972         }
 973
 974         /*
 975          * attach endpoint if needed
 976          * see [image of mod_host]
 977          */
 978         if (!usbhsh_ep_to_uep(ep)) {
 979                 ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
 980                 if (ret < 0) {
 981                         dev_err(dev, "endpoint attach failed\n");
 982                         goto usbhsh_urb_enqueue_error_free_device;
 983                 }
 984         }
 985
 986         /*
 987          * attach pipe to endpoint
 988          * see [image of mod_host]
 989          */
 990         for (i = 0; i < 1024; i++) {
 991                 ret = usbhsh_pipe_attach(hpriv, urb);
 992                 if (ret < 0)
 993                         msleep(100);
 994                 else
 995                         break;
 996         }
 997         if (ret < 0) {
 998                 dev_err(dev, "pipe attach failed\n");
 999                 goto usbhsh_urb_enqueue_error_free_endpoint;
1000         }
1001
1002         /*
1003          * push packet
1004          */
1005         if (usb_pipecontrol(urb->pipe))
1006                 ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1007         else
1008                 ret = usbhsh_queue_push(hcd, urb, mem_flags);
1009
1010         return ret;
1011
1012 usbhsh_urb_enqueue_error_free_endpoint:
1013         usbhsh_endpoint_detach(hpriv, ep);
1014 usbhsh_urb_enqueue_error_free_device:
1015         if (new_udev)
1016                 usbhsh_device_detach(hpriv, new_udev);
1017 usbhsh_urb_enqueue_error_not_linked:
1018
1019         dev_dbg(dev, "%s error\n", __func__);
1020
1021         return ret;
1022 }
1023
1024 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1025 {
1026         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1027         struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1028
1029         if (ureq) {
1030                 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1031                 struct usbhs_pkt *pkt = &ureq->pkt;
1032
1033                 usbhs_pkt_pop(pkt->pipe, pkt);
1034                 usbhsh_queue_done(priv, pkt);
1035         }
1036
1037         return 0;
1038 }
1039
1040 static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1041                                     struct usb_host_endpoint *ep)
1042 {
1043         struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1044         struct usbhsh_device *udev;
1045         struct usbhsh_hpriv *hpriv;
1046
1047         /*
1048          * this function might be called manytimes by same hcd/ep
1049          * in-endpoint == out-endpoint if ep == dcp.
1050          */
1051         if (!uep)
1052                 return;
1053
1054         udev    = usbhsh_uep_to_udev(uep);
1055         hpriv   = usbhsh_hcd_to_hpriv(hcd);
1056
1057         usbhsh_endpoint_detach(hpriv, ep);
1058
1059         /*
1060          * if there is no endpoint,
1061          * free device
1062          */
1063         if (!usbhsh_device_has_endpoint(udev))
1064                 usbhsh_device_detach(hpriv, udev);
1065 }
1066
1067 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1068 {
1069         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1070         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1071         struct device *dev = usbhs_priv_to_dev(priv);
1072         int roothub_id = 1; /* only 1 root hub */
1073
1074         /*
1075          * does port stat was changed ?
1076          * check USB_PORT_STAT_C_xxx << 16
1077          */
1078         if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
1079                 *buf = (1 << roothub_id);
1080         else
1081                 *buf = 0;
1082
1083         dev_dbg(dev, "%s (%02x)\n", __func__, *buf);
1084
1085         return !!(*buf);
1086 }
1087
1088 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1089                                     u16 typeReq, u16 wValue,
1090                                     u16 wIndex, char *buf, u16 wLength)
1091 {
1092         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1093         struct device *dev = usbhs_priv_to_dev(priv);
1094
1095         switch (wValue) {
1096         case C_HUB_OVER_CURRENT:
1097         case C_HUB_LOCAL_POWER:
1098                 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1099                 return 0;
1100         }
1101
1102         return -EPIPE;
1103 }
1104
1105 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1106                                      u16 typeReq, u16 wValue,
1107                                      u16 wIndex, char *buf, u16 wLength)
1108 {
1109         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1110         struct device *dev = usbhs_priv_to_dev(priv);
1111         int enable = (typeReq == SetPortFeature);
1112         int speed, i, timeout = 128;
1113         int roothub_id = 1; /* only 1 root hub */
1114
1115         /* common error */
1116         if (wIndex > roothub_id || wLength != 0)
1117                 return -EPIPE;
1118
1119         /* check wValue */
1120         switch (wValue) {
1121         case USB_PORT_FEAT_POWER:
1122                 usbhs_vbus_ctrl(priv, enable);
1123                 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1124                 break;
1125
1126         case USB_PORT_FEAT_ENABLE:
1127         case USB_PORT_FEAT_SUSPEND:
1128         case USB_PORT_FEAT_C_ENABLE:
1129         case USB_PORT_FEAT_C_SUSPEND:
1130         case USB_PORT_FEAT_C_CONNECTION:
1131         case USB_PORT_FEAT_C_OVER_CURRENT:
1132         case USB_PORT_FEAT_C_RESET:
1133                 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1134                 break;
1135
1136         case USB_PORT_FEAT_RESET:
1137                 if (!enable)
1138                         break;
1139
1140                 usbhsh_port_stat_clear(hpriv,
1141                                        USB_PORT_STAT_HIGH_SPEED |
1142                                        USB_PORT_STAT_LOW_SPEED);
1143
1144                 usbhsh_queue_force_pop_all(priv);
1145
1146                 usbhs_bus_send_reset(priv);
1147                 msleep(20);
1148                 usbhs_bus_send_sof_enable(priv);
1149
1150                 for (i = 0; i < timeout ; i++) {
1151                         switch (usbhs_bus_get_speed(priv)) {
1152                         case USB_SPEED_LOW:
1153                                 speed = USB_PORT_STAT_LOW_SPEED;
1154                                 goto got_usb_bus_speed;
1155                         case USB_SPEED_HIGH:
1156                                 speed = USB_PORT_STAT_HIGH_SPEED;
1157                                 goto got_usb_bus_speed;
1158                         case USB_SPEED_FULL:
1159                                 speed = 0;
1160                                 goto got_usb_bus_speed;
1161                         }
1162
1163                         msleep(20);
1164                 }
1165                 return -EPIPE;
1166
1167 got_usb_bus_speed:
1168                 usbhsh_port_stat_set(hpriv, speed);
1169                 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1170
1171                 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1172                         __func__, speed);
1173
1174                 /* status change is not needed */
1175                 return 0;
1176
1177         default:
1178                 return -EPIPE;
1179         }
1180
1181         /* set/clear status */
1182         if (enable)
1183                 usbhsh_port_stat_set(hpriv, (1 << wValue));
1184         else
1185                 usbhsh_port_stat_clear(hpriv, (1 << wValue));
1186
1187         return 0;
1188 }
1189
1190 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1191                                    u16 typeReq, u16 wValue,
1192                                    u16 wIndex, char *buf, u16 wLength)
1193 {
1194         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1195         struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1196         struct device *dev = usbhs_priv_to_dev(priv);
1197         int roothub_id = 1; /* only 1 root hub */
1198
1199         switch (typeReq) {
1200         case GetHubStatus:
1201                 dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1202
1203                 *buf = 0x00;
1204                 break;
1205
1206         case GetPortStatus:
1207                 if (wIndex != roothub_id)
1208                         return -EPIPE;
1209
1210                 dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1211                 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1212                 break;
1213
1214         case GetHubDescriptor:
1215                 desc->bDescriptorType           = 0x29;
1216                 desc->bHubContrCurrent          = 0;
1217                 desc->bNbrPorts                 = roothub_id;
1218                 desc->bDescLength               = 9;
1219                 desc->bPwrOn2PwrGood            = 0;
1220                 desc->wHubCharacteristics       = cpu_to_le16(0x0011);
1221                 desc->u.hs.DeviceRemovable[0]   = (roothub_id << 1);
1222                 desc->u.hs.DeviceRemovable[1]   = ~0;
1223                 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1224                 break;
1225         }
1226
1227         return 0;
1228 }
1229
1230 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1231                               u16 wIndex, char *buf, u16 wLength)
1232 {
1233         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1234         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1235         struct device *dev = usbhs_priv_to_dev(priv);
1236         int ret = -EPIPE;
1237
1238         switch (typeReq) {
1239
1240         /* Hub Feature */
1241         case ClearHubFeature:
1242         case SetHubFeature:
1243                 ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1244                                                wValue, wIndex, buf, wLength);
1245                 break;
1246
1247         /* Port Feature */
1248         case SetPortFeature:
1249         case ClearPortFeature:
1250                 ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1251                                                 wValue, wIndex, buf, wLength);
1252                 break;
1253
1254         /* Get status */
1255         case GetHubStatus:
1256         case GetPortStatus:
1257         case GetHubDescriptor:
1258                 ret = __usbhsh_hub_get_status(hpriv, typeReq,
1259                                               wValue, wIndex, buf, wLength);
1260                 break;
1261         }
1262
1263         dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1264                 typeReq, ret, usbhsh_port_stat_get(hpriv));
1265
1266         return ret;
1267 }
1268
1269 static int usbhsh_bus_nop(struct usb_hcd *hcd)
1270 {
1271         /* nothing to do */
1272         return 0;
1273 }
1274
1275 static struct hc_driver usbhsh_driver = {
1276         .description =          usbhsh_hcd_name,
1277         .hcd_priv_size =        sizeof(struct usbhsh_hpriv),
1278
1279         /*
1280          * generic hardware linkage
1281          */
1282         .flags =                HCD_USB2,
1283
1284         .start =                usbhsh_host_start,
1285         .stop =                 usbhsh_host_stop,
1286
1287         /*
1288          * managing i/o requests and associated device resources
1289          */
1290         .urb_enqueue =          usbhsh_urb_enqueue,
1291         .urb_dequeue =          usbhsh_urb_dequeue,
1292         .endpoint_disable =     usbhsh_endpoint_disable,
1293
1294         /*
1295          * root hub
1296          */
1297         .hub_status_data =      usbhsh_hub_status_data,
1298         .hub_control =          usbhsh_hub_control,
1299         .bus_suspend =          usbhsh_bus_nop,
1300         .bus_resume =           usbhsh_bus_nop,
1301 };
1302
1303 /*
1304  *              interrupt functions
1305  */
1306 static int usbhsh_irq_attch(struct usbhs_priv *priv,
1307                             struct usbhs_irq_state *irq_state)
1308 {
1309         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1310         struct device *dev = usbhs_priv_to_dev(priv);
1311
1312         dev_dbg(dev, "device attached\n");
1313
1314         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1315         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1316
1317         /*
1318          * attch interrupt might happen infinitely on some device
1319          * (on self power USB hub ?)
1320          * disable it here.
1321          *
1322          * usbhsh_is_running() becomes effective
1323          * according to this process.
1324          * see
1325          *      usbhsh_is_running()
1326          *      usbhsh_urb_enqueue()
1327          */
1328         hpriv->mod.irq_attch = NULL;
1329         usbhs_irq_callback_update(priv, &hpriv->mod);
1330
1331         return 0;
1332 }
1333
1334 static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1335                            struct usbhs_irq_state *irq_state)
1336 {
1337         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1338         struct device *dev = usbhs_priv_to_dev(priv);
1339
1340         dev_dbg(dev, "device detached\n");
1341
1342         usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1343         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1344
1345         /*
1346          * enable attch interrupt again
1347          *
1348          * usbhsh_is_running() becomes invalid
1349          * according to this process.
1350          * see
1351          *      usbhsh_is_running()
1352          *      usbhsh_urb_enqueue()
1353          */
1354         hpriv->mod.irq_attch = usbhsh_irq_attch;
1355         usbhs_irq_callback_update(priv, &hpriv->mod);
1356
1357         /*
1358          * usbhsh_queue_force_pop_all() should be called
1359          * after usbhsh_is_running() becomes invalid.
1360          */
1361         usbhsh_queue_force_pop_all(priv);
1362
1363         return 0;
1364 }
1365
1366 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1367                                 struct usbhs_irq_state *irq_state)
1368 {
1369         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1370         struct device *dev = usbhs_priv_to_dev(priv);
1371
1372         dev_dbg(dev, "setup packet OK\n");
1373
1374         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1375
1376         return 0;
1377 }
1378
1379 static int usbhsh_irq_setup_err(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 Err\n");
1386
1387         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1388
1389         return 0;
1390 }
1391
1392 /*
1393  *              module start/stop
1394  */
1395 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1396 {
1397         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1398         struct usbhs_pipe *pipe;
1399         u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
1400         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1401         int old_type, dir_in, i;
1402
1403         /* init all pipe */
1404         old_type = USB_ENDPOINT_XFER_CONTROL;
1405         for (i = 0; i < pipe_size; i++) {
1406
1407                 /*
1408                  * data "output" will be finished as soon as possible,
1409                  * but there is no guaranty at data "input" case.
1410                  *
1411                  * "input" needs "standby" pipe.
1412                  * So, "input" direction pipe > "output" direction pipe
1413                  * is good idea.
1414                  *
1415                  * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1416                  * and the other will be input direction here.
1417                  *
1418                  * ex)
1419                  * ...
1420                  * USB_ENDPOINT_XFER_ISOC -> dir out
1421                  * USB_ENDPOINT_XFER_ISOC -> dir in
1422                  * USB_ENDPOINT_XFER_BULK -> dir out
1423                  * USB_ENDPOINT_XFER_BULK -> dir in
1424                  * USB_ENDPOINT_XFER_BULK -> dir in
1425                  * ...
1426                  */
1427                 dir_in = (pipe_type[i] == old_type);
1428                 old_type = pipe_type[i];
1429
1430                 if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) {
1431                         pipe = usbhs_dcp_malloc(priv);
1432                         usbhsh_hpriv_to_dcp(hpriv) = pipe;
1433                 } else {
1434                         pipe = usbhs_pipe_malloc(priv,
1435                                                  pipe_type[i],
1436                                                  dir_in);
1437                 }
1438
1439                 pipe->mod_private = NULL;
1440         }
1441 }
1442
1443 static int usbhsh_start(struct usbhs_priv *priv)
1444 {
1445         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1446         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1447         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1448         struct device *dev = usbhs_priv_to_dev(priv);
1449         int ret;
1450
1451         /* add hcd */
1452         ret = usb_add_hcd(hcd, 0, 0);
1453         if (ret < 0)
1454                 return 0;
1455
1456         /*
1457          * pipe initialize and enable DCP
1458          */
1459         usbhs_pipe_init(priv,
1460                         usbhsh_dma_map_ctrl);
1461         usbhs_fifo_init(priv);
1462         usbhsh_pipe_init_for_host(priv);
1463
1464         /*
1465          * system config enble
1466          * - HI speed
1467          * - host
1468          * - usb module
1469          */
1470         usbhs_sys_host_ctrl(priv, 1);
1471
1472         /*
1473          * enable irq callback
1474          */
1475         mod->irq_attch          = usbhsh_irq_attch;
1476         mod->irq_dtch           = usbhsh_irq_dtch;
1477         mod->irq_sack           = usbhsh_irq_setup_ack;
1478         mod->irq_sign           = usbhsh_irq_setup_err;
1479         usbhs_irq_callback_update(priv, mod);
1480
1481         dev_dbg(dev, "start host\n");
1482
1483         return ret;
1484 }
1485
1486 static int usbhsh_stop(struct usbhs_priv *priv)
1487 {
1488         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1489         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1490         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1491         struct device *dev = usbhs_priv_to_dev(priv);
1492
1493         /*
1494          * disable irq callback
1495          */
1496         mod->irq_attch  = NULL;
1497         mod->irq_dtch   = NULL;
1498         mod->irq_sack   = NULL;
1499         mod->irq_sign   = NULL;
1500         usbhs_irq_callback_update(priv, mod);
1501
1502         usb_remove_hcd(hcd);
1503
1504         /* disable sys */
1505         usbhs_sys_host_ctrl(priv, 0);
1506
1507         dev_dbg(dev, "quit host\n");
1508
1509         return 0;
1510 }
1511
1512 int usbhs_mod_host_probe(struct usbhs_priv *priv)
1513 {
1514         struct usbhsh_hpriv *hpriv;
1515         struct usb_hcd *hcd;
1516         struct usbhsh_device *udev;
1517         struct device *dev = usbhs_priv_to_dev(priv);
1518         int i;
1519
1520         /* initialize hcd */
1521         hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1522         if (!hcd) {
1523                 dev_err(dev, "Failed to create hcd\n");
1524                 return -ENOMEM;
1525         }
1526         hcd->has_tt = 1; /* for low/full speed */
1527
1528         /*
1529          * CAUTION
1530          *
1531          * There is no guarantee that it is possible to access usb module here.
1532          * Don't accesses to it.
1533          * The accesse will be enable after "usbhsh_start"
1534          */
1535
1536         hpriv = usbhsh_hcd_to_hpriv(hcd);
1537
1538         /*
1539          * register itself
1540          */
1541         usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1542
1543         /* init hpriv */
1544         hpriv->mod.name         = "host";
1545         hpriv->mod.start        = usbhsh_start;
1546         hpriv->mod.stop         = usbhsh_stop;
1547         usbhsh_port_stat_init(hpriv);
1548
1549         /* init all device */
1550         usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1551                 udev->usbv      = NULL;
1552                 INIT_LIST_HEAD(&udev->ep_list_head);
1553         }
1554
1555         dev_info(dev, "host probed\n");
1556
1557         return 0;
1558 }
1559
1560 int usbhs_mod_host_remove(struct usbhs_priv *priv)
1561 {
1562         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1563         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1564
1565         usb_put_hcd(hcd);
1566
1567         return 0;
1568 }