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         if (unlikely(!uep)) {
 338                 dev_err(dev, "no uep\n");
 339                 return;
 340         }
 341
 342         /********************  spin lock ********************/
 343         usbhs_lock(priv, flags);
 344
 345         pipe = usbhsh_uep_to_pipe(uep);
 346
 347         if (unlikely(!pipe)) {
 348                 dev_err(dev, "uep doens't have pipe\n");
 349         } else {
 350                 struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
 351                 struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
 352
 353                 /* detach pipe from uep */
 354                 usbhsh_uep_to_pipe(uep)         = NULL;
 355                 usbhsh_pipe_to_uep(pipe)        = NULL;
 356
 357                 dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
 358                         usbhsh_device_number(hpriv, udev),
 359                         usb_endpoint_num(&ep->desc),
 360                         usbhs_pipe_name(pipe));
 361         }
 362
 363         usbhs_unlock(priv, flags);
 364         /********************  spin unlock ******************/
 365 }
 366
 367 /*
 368  *              endpoint control
 369  */
 370 static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
 371                                   struct urb *urb,
 372                                   gfp_t mem_flags)
 373 {
 374         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 375         struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
 376         struct usb_host_endpoint *ep = urb->ep;
 377         struct usbhsh_ep *uep;
 378         struct device *dev = usbhs_priv_to_dev(priv);
 379         struct usb_endpoint_descriptor *desc = &ep->desc;
 380         unsigned long flags;
 381
 382         uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
 383         if (!uep) {
 384                 dev_err(dev, "usbhsh_ep alloc fail\n");
 385                 return -ENOMEM;
 386         }
 387
 388         /********************  spin lock ********************/
 389         usbhs_lock(priv, flags);
 390
 391         /*
 392          * init endpoint
 393          */
 394         INIT_LIST_HEAD(&uep->ep_list);
 395         list_add_tail(&uep->ep_list, &udev->ep_list_head);
 396
 397         usbhsh_uep_to_udev(uep) = udev;
 398         usbhsh_uep_to_ep(uep)   = ep;
 399         usbhsh_ep_to_uep(ep)    = uep;
 400
 401         usbhs_unlock(priv, flags);
 402         /********************  spin unlock ******************/
 403
 404         dev_dbg(dev, "%s [%d-%d]\n", __func__,
 405                 usbhsh_device_number(hpriv, udev),
 406                 usb_endpoint_num(desc));
 407
 408         return 0;
 409 }
 410
 411 static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
 412                                    struct usb_host_endpoint *ep)
 413 {
 414         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 415         struct device *dev = usbhs_priv_to_dev(priv);
 416         struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
 417         unsigned long flags;
 418
 419         if (!uep)
 420                 return;
 421
 422         dev_dbg(dev, "%s [%d-%d]\n", __func__,
 423                 usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
 424                 usb_endpoint_num(&ep->desc));
 425
 426         if (usbhsh_uep_to_pipe(uep))
 427                 usbhsh_pipe_detach(hpriv, uep);
 428
 429         /********************  spin lock ********************/
 430         usbhs_lock(priv, flags);
 431
 432         /* remove this endpoint from udev */
 433         list_del_init(&uep->ep_list);
 434
 435         usbhsh_uep_to_udev(uep) = NULL;
 436         usbhsh_uep_to_ep(uep)   = NULL;
 437         usbhsh_ep_to_uep(ep)    = NULL;
 438
 439         usbhs_unlock(priv, flags);
 440         /********************  spin unlock ******************/
 441
 442         kfree(uep);
 443 }
 444
 445 static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
 446                                        struct usbhsh_device *udev)
 447 {
 448         struct usbhsh_ep *uep, *next;
 449
 450         list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
 451                 usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
 452 }
 453
 454 /*
 455  *              device control
 456  */
 457 static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
 458                                      struct usbhsh_device *udev)
 459 {
 460         struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
 461
 462         return hcd->self.root_hub == usbv->parent;
 463 }
 464
 465 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
 466 {
 467         return !list_empty(&udev->ep_list_head);
 468 }
 469
 470 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
 471                                                struct urb *urb)
 472 {
 473         struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 474         struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 475
 476         /* usbhsh_device_attach() is still not called */
 477         if (!udev)
 478                 return NULL;
 479
 480         /* if it is device0, return it */
 481         if (0 == usb_pipedevice(urb->pipe))
 482                 return usbhsh_device0(hpriv);
 483
 484         /* return attached device */
 485         return udev;
 486 }
 487
 488 static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
 489                                                  struct urb *urb)
 490 {
 491         struct usbhsh_device *udev = NULL;
 492         struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
 493         struct usbhsh_device *pos;
 494         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 495         struct device *dev = usbhsh_hcd_to_dev(hcd);
 496         struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 497         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 498         unsigned long flags;
 499         u16 upphub, hubport;
 500         int i;
 501
 502         /*
 503          * This function should be called only while urb is pointing to device0.
 504          * It will attach unused usbhsh_device to urb (usbv),
 505          * and initialize device0.
 506          * You can use usbhsh_device_get() to get "current" udev,
 507          * and usbhsh_usbv_to_udev() is for "attached" udev.
 508          */
 509         if (0 != usb_pipedevice(urb->pipe)) {
 510                 dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
 511                 return NULL;
 512         }
 513
 514         /********************  spin lock ********************/
 515         usbhs_lock(priv, flags);
 516
 517         /*
 518          * find unused device
 519          */
 520         usbhsh_for_each_udev(pos, hpriv, i) {
 521                 if (usbhsh_udev_is_used(pos))
 522                         continue;
 523                 udev = pos;
 524                 break;
 525         }
 526
 527         if (udev) {
 528                 /*
 529                  * usbhsh_usbv_to_udev()
 530                  * usbhsh_udev_to_usbv()
 531                  * will be enable
 532                  */
 533                 dev_set_drvdata(&usbv->dev, udev);
 534                 udev->usbv = usbv;
 535         }
 536
 537         usbhs_unlock(priv, flags);
 538         /********************  spin unlock ******************/
 539
 540         if (!udev) {
 541                 dev_err(dev, "no free usbhsh_device\n");
 542                 return NULL;
 543         }
 544
 545         if (usbhsh_device_has_endpoint(udev)) {
 546                 dev_warn(dev, "udev have old endpoint\n");
 547                 usbhsh_endpoint_detach_all(hpriv, udev);
 548         }
 549
 550         if (usbhsh_device_has_endpoint(udev0)) {
 551                 dev_warn(dev, "udev0 have old endpoint\n");
 552                 usbhsh_endpoint_detach_all(hpriv, udev0);
 553         }
 554
 555         /* uep will be attached */
 556         INIT_LIST_HEAD(&udev0->ep_list_head);
 557         INIT_LIST_HEAD(&udev->ep_list_head);
 558
 559         /*
 560          * set device0 config
 561          */
 562         usbhs_set_device_config(priv,
 563                                 0, 0, 0, usbv->speed);
 564
 565         /*
 566          * set new device config
 567          */
 568         upphub  = 0;
 569         hubport = 0;
 570         if (!usbhsh_connected_to_rhdev(hcd, udev)) {
 571                 /* if udev is not connected to rhdev, it means parent is Hub */
 572                 struct usbhsh_device *parent = usbhsh_device_parent(udev);
 573
 574                 upphub  = usbhsh_device_number(hpriv, parent);
 575                 hubport = usbhsh_device_hubport(udev);
 576
 577                 dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__,
 578                         upphub, hubport, parent);
 579         }
 580
 581         usbhs_set_device_config(priv,
 582                                usbhsh_device_number(hpriv, udev),
 583                                upphub, hubport, usbv->speed);
 584
 585         dev_dbg(dev, "%s [%d](%p)\n", __func__,
 586                 usbhsh_device_number(hpriv, udev), udev);
 587
 588         return udev;
 589 }
 590
 591 static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
 592                                struct usbhsh_device *udev)
 593 {
 594         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 595         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 596         struct device *dev = usbhsh_hcd_to_dev(hcd);
 597         struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
 598         unsigned long flags;
 599
 600         dev_dbg(dev, "%s [%d](%p)\n", __func__,
 601                 usbhsh_device_number(hpriv, udev), udev);
 602
 603         if (usbhsh_device_has_endpoint(udev)) {
 604                 dev_warn(dev, "udev still have endpoint\n");
 605                 usbhsh_endpoint_detach_all(hpriv, udev);
 606         }
 607
 608         /*
 609          * There is nothing to do if it is device0.
 610          * see
 611          *  usbhsh_device_attach()
 612          *  usbhsh_device_get()
 613          */
 614         if (0 == usbhsh_device_number(hpriv, udev))
 615                 return;
 616
 617         /********************  spin lock ********************/
 618         usbhs_lock(priv, flags);
 619
 620         /*
 621          * usbhsh_usbv_to_udev()
 622          * usbhsh_udev_to_usbv()
 623          * will be disable
 624          */
 625         dev_set_drvdata(&usbv->dev, NULL);
 626         udev->usbv = NULL;
 627
 628         usbhs_unlock(priv, flags);
 629         /********************  spin unlock ******************/
 630 }
 631
 632 /*
 633  *              queue push/pop
 634  */
 635 static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
 636 {
 637         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 638         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 639         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 640         struct urb *urb = ureq->urb;
 641         struct device *dev = usbhs_priv_to_dev(priv);
 642         int status = 0;
 643
 644         dev_dbg(dev, "%s\n", __func__);
 645
 646         if (!urb) {
 647                 dev_warn(dev, "pkt doesn't have urb\n");
 648                 return;
 649         }
 650
 651         if (!usbhsh_is_running(hpriv))
 652                 status = -ESHUTDOWN;
 653
 654         urb->actual_length = pkt->actual;
 655         usbhsh_ureq_free(hpriv, ureq);
 656
 657         usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
 658         usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep));
 659
 660         usb_hcd_unlink_urb_from_ep(hcd, urb);
 661         usb_hcd_giveback_urb(hcd, urb, status);
 662 }
 663
 664 static int usbhsh_queue_push(struct usb_hcd *hcd,
 665                              struct urb *urb,
 666                              gfp_t mem_flags)
 667 {
 668         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 669         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 670         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 671         struct device *dev = usbhsh_hcd_to_dev(hcd);
 672         struct usbhsh_request *ureq;
 673         void *buf;
 674         int len, sequence;
 675
 676         if (usb_pipeisoc(urb->pipe)) {
 677                 dev_err(dev, "pipe iso is not supported now\n");
 678                 return -EIO;
 679         }
 680
 681         /* this ureq will be freed on usbhsh_queue_done() */
 682         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 683         if (unlikely(!ureq)) {
 684                 dev_err(dev, "ureq alloc fail\n");
 685                 return -ENOMEM;
 686         }
 687
 688         if (usb_pipein(urb->pipe))
 689                 pipe->handler = &usbhs_fifo_pio_pop_handler;
 690         else
 691                 pipe->handler = &usbhs_fifo_pio_push_handler;
 692
 693         buf = (void *)(urb->transfer_buffer + urb->actual_length);
 694         len = urb->transfer_buffer_length - urb->actual_length;
 695
 696         sequence = usb_gettoggle(urb->dev,
 697                                  usb_pipeendpoint(urb->pipe),
 698                                  usb_pipeout(urb->pipe));
 699
 700         dev_dbg(dev, "%s\n", __func__);
 701         usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
 702                        buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
 703                        sequence);
 704
 705         usbhs_pkt_start(pipe);
 706
 707         return 0;
 708 }
 709
 710 static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
 711                                    struct usbhs_pipe *pipe)
 712 {
 713         struct usbhs_pkt *pkt;
 714
 715         while (1) {
 716                 pkt = usbhs_pkt_pop(pipe, NULL);
 717                 if (!pkt)
 718                         break;
 719
 720                 /*
 721                  * if all packet are gone, usbhsh_endpoint_disable()
 722                  * will be called.
 723                  * then, attached device/endpoint/pipe will be detached
 724                  */
 725                 usbhsh_queue_done(priv, pkt);
 726         }
 727 }
 728
 729 static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
 730 {
 731         struct usbhs_pipe *pos;
 732         int i;
 733
 734         usbhs_for_each_pipe_with_dcp(pos, priv, i)
 735                 usbhsh_queue_force_pop(priv, pos);
 736 }
 737
 738 /*
 739  *              DCP setup stage
 740  */
 741 static int usbhsh_is_request_address(struct urb *urb)
 742 {
 743         struct usb_ctrlrequest *req;
 744
 745         req = (struct usb_ctrlrequest *)urb->setup_packet;
 746
 747         if ((DeviceOutRequest    == req->bRequestType << 8) &&
 748             (USB_REQ_SET_ADDRESS == req->bRequest))
 749                 return 1;
 750         else
 751                 return 0;
 752 }
 753
 754 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
 755                                            struct urb *urb,
 756                                            struct usbhs_pipe *pipe)
 757 {
 758         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 759         struct usb_ctrlrequest req;
 760         struct device *dev = usbhs_priv_to_dev(priv);
 761
 762         /*
 763          * wait setup packet ACK
 764          * see
 765          *      usbhsh_irq_setup_ack()
 766          *      usbhsh_irq_setup_err()
 767          */
 768         init_completion(&hpriv->setup_ack_done);
 769
 770         /* copy original request */
 771         memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
 772
 773         /*
 774          * renesas_usbhs can not use original usb address.
 775          * see HARDWARE LIMITATION.
 776          * modify usb address here to use attached device.
 777          * see usbhsh_device_attach()
 778          */
 779         if (usbhsh_is_request_address(urb)) {
 780                 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 781                 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 782
 783                 /* udev is a attached device */
 784                 req.wValue = usbhsh_device_number(hpriv, udev);
 785                 dev_dbg(dev, "create new address - %d\n", req.wValue);
 786         }
 787
 788         /* set request */
 789         usbhs_usbreq_set_val(priv, &req);
 790
 791         /*
 792          * wait setup packet ACK
 793          */
 794         wait_for_completion(&hpriv->setup_ack_done);
 795
 796         dev_dbg(dev, "%s done\n", __func__);
 797 }
 798
 799 /*
 800  *              DCP data stage
 801  */
 802 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
 803                                           struct usbhs_pkt *pkt)
 804 {
 805         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 806         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 807
 808         /* this ureq was connected to urb when usbhsh_urb_enqueue()  */
 809
 810         usbhsh_ureq_free(hpriv, ureq);
 811 }
 812
 813 static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
 814                                          struct urb *urb,
 815                                          struct usbhs_pipe *pipe,
 816                                          gfp_t mem_flags)
 817
 818 {
 819         struct usbhsh_request *ureq;
 820
 821         /* this ureq will be freed on usbhsh_data_stage_packet_done() */
 822         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 823         if (unlikely(!ureq))
 824                 return -ENOMEM;
 825
 826         if (usb_pipein(urb->pipe))
 827                 pipe->handler = &usbhs_dcp_data_stage_in_handler;
 828         else
 829                 pipe->handler = &usbhs_dcp_data_stage_out_handler;
 830
 831         usbhs_pkt_push(pipe, &ureq->pkt,
 832                        usbhsh_data_stage_packet_done,
 833                        urb->transfer_buffer,
 834                        urb->transfer_buffer_length,
 835                        (urb->transfer_flags & URB_ZERO_PACKET),
 836                        -1);
 837
 838         return 0;
 839 }
 840
 841 /*
 842  *              DCP status stage
 843  */
 844 static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
 845                                             struct urb *urb,
 846                                             struct usbhs_pipe *pipe,
 847                                             gfp_t mem_flags)
 848 {
 849         struct usbhsh_request *ureq;
 850
 851         /* This ureq will be freed on usbhsh_queue_done() */
 852         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 853         if (unlikely(!ureq))
 854                 return -ENOMEM;
 855
 856         if (usb_pipein(urb->pipe))
 857                 pipe->handler = &usbhs_dcp_status_stage_in_handler;
 858         else
 859                 pipe->handler = &usbhs_dcp_status_stage_out_handler;
 860
 861         usbhs_pkt_push(pipe, &ureq->pkt,
 862                        usbhsh_queue_done,
 863                        NULL,
 864                        urb->transfer_buffer_length,
 865                        0, -1);
 866
 867         return 0;
 868 }
 869
 870 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
 871                                  struct urb *urb,
 872                                  gfp_t mflags)
 873 {
 874         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 875         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 876         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 877         struct device *dev = usbhsh_hcd_to_dev(hcd);
 878         int ret;
 879
 880         dev_dbg(dev, "%s\n", __func__);
 881
 882         /*
 883          * setup stage
 884          *
 885          * usbhsh_send_setup_stage_packet() wait SACK/SIGN
 886          */
 887         usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
 888
 889         /*
 890          * data stage
 891          *
 892          * It is pushed only when urb has buffer.
 893          */
 894         if (urb->transfer_buffer_length) {
 895                 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
 896                 if (ret < 0) {
 897                         dev_err(dev, "data stage failed\n");
 898                         return ret;
 899                 }
 900         }
 901
 902         /*
 903          * status stage
 904          */
 905         ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
 906         if (ret < 0) {
 907                 dev_err(dev, "status stage failed\n");
 908                 return ret;
 909         }
 910
 911         /*
 912          * start pushed packets
 913          */
 914         usbhs_pkt_start(pipe);
 915
 916         return 0;
 917 }
 918
 919 /*
 920  *              dma map functions
 921  */
 922 static int usbhsh_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
 923 {
 924         return 0;
 925 }
 926
 927 /*
 928  *              for hc_driver
 929  */
 930 static int usbhsh_host_start(struct usb_hcd *hcd)
 931 {
 932         return 0;
 933 }
 934
 935 static void usbhsh_host_stop(struct usb_hcd *hcd)
 936 {
 937 }
 938
 939 static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
 940                               struct urb *urb,
 941                               gfp_t mem_flags)
 942 {
 943         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 944         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 945         struct device *dev = usbhs_priv_to_dev(priv);
 946         struct usb_host_endpoint *ep = urb->ep;
 947         struct usbhsh_device *new_udev = NULL;
 948         int is_dir_in = usb_pipein(urb->pipe);
 949         int i;
 950         int ret;
 951
 952         dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
 953
 954         if (!usbhsh_is_running(hpriv)) {
 955                 ret = -EIO;
 956                 dev_err(dev, "host is not running\n");
 957                 goto usbhsh_urb_enqueue_error_not_linked;
 958         }
 959
 960         ret = usb_hcd_link_urb_to_ep(hcd, urb);
 961         if (ret) {
 962                 dev_err(dev, "urb link failed\n");
 963                 goto usbhsh_urb_enqueue_error_not_linked;
 964         }
 965
 966         /*
 967          * attach udev if needed
 968          * see [image of mod_host]
 969          */
 970         if (!usbhsh_device_get(hpriv, urb)) {
 971                 new_udev = usbhsh_device_attach(hpriv, urb);
 972                 if (!new_udev) {
 973                         ret = -EIO;
 974                         dev_err(dev, "device attach failed\n");
 975                         goto usbhsh_urb_enqueue_error_not_linked;
 976                 }
 977         }
 978
 979         /*
 980          * attach endpoint if needed
 981          * see [image of mod_host]
 982          */
 983         if (!usbhsh_ep_to_uep(ep)) {
 984                 ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
 985                 if (ret < 0) {
 986                         dev_err(dev, "endpoint attach failed\n");
 987                         goto usbhsh_urb_enqueue_error_free_device;
 988                 }
 989         }
 990
 991         /*
 992          * attach pipe to endpoint
 993          * see [image of mod_host]
 994          */
 995         for (i = 0; i < 1024; i++) {
 996                 ret = usbhsh_pipe_attach(hpriv, urb);
 997                 if (ret < 0)
 998                         msleep(100);
 999                 else
1000                         break;
1001         }
1002         if (ret < 0) {
1003                 dev_err(dev, "pipe attach failed\n");
1004                 goto usbhsh_urb_enqueue_error_free_endpoint;
1005         }
1006
1007         /*
1008          * push packet
1009          */
1010         if (usb_pipecontrol(urb->pipe))
1011                 ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1012         else
1013                 ret = usbhsh_queue_push(hcd, urb, mem_flags);
1014
1015         return ret;
1016
1017 usbhsh_urb_enqueue_error_free_endpoint:
1018         usbhsh_endpoint_detach(hpriv, ep);
1019 usbhsh_urb_enqueue_error_free_device:
1020         if (new_udev)
1021                 usbhsh_device_detach(hpriv, new_udev);
1022 usbhsh_urb_enqueue_error_not_linked:
1023
1024         dev_dbg(dev, "%s error\n", __func__);
1025
1026         return ret;
1027 }
1028
1029 static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1030 {
1031         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1032         struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1033
1034         if (ureq) {
1035                 struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1036                 struct usbhs_pkt *pkt = &ureq->pkt;
1037
1038                 usbhs_pkt_pop(pkt->pipe, pkt);
1039                 usbhsh_queue_done(priv, pkt);
1040         }
1041
1042         return 0;
1043 }
1044
1045 static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1046                                     struct usb_host_endpoint *ep)
1047 {
1048         struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1049         struct usbhsh_device *udev;
1050         struct usbhsh_hpriv *hpriv;
1051
1052         /*
1053          * this function might be called manytimes by same hcd/ep
1054          * in-endpoint == out-endpoint if ep == dcp.
1055          */
1056         if (!uep)
1057                 return;
1058
1059         udev    = usbhsh_uep_to_udev(uep);
1060         hpriv   = usbhsh_hcd_to_hpriv(hcd);
1061
1062         usbhsh_endpoint_detach(hpriv, ep);
1063
1064         /*
1065          * if there is no endpoint,
1066          * free device
1067          */
1068         if (!usbhsh_device_has_endpoint(udev))
1069                 usbhsh_device_detach(hpriv, udev);
1070 }
1071
1072 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1073 {
1074         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1075         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1076         struct device *dev = usbhs_priv_to_dev(priv);
1077         int roothub_id = 1; /* only 1 root hub */
1078
1079         /*
1080          * does port stat was changed ?
1081          * check USB_PORT_STAT_C_xxx << 16
1082          */
1083         if (usbhsh_port_stat_get(hpriv) & 0xFFFF0000)
1084                 *buf = (1 << roothub_id);
1085         else
1086                 *buf = 0;
1087
1088         dev_dbg(dev, "%s (%02x)\n", __func__, *buf);
1089
1090         return !!(*buf);
1091 }
1092
1093 static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1094                                     u16 typeReq, u16 wValue,
1095                                     u16 wIndex, char *buf, u16 wLength)
1096 {
1097         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1098         struct device *dev = usbhs_priv_to_dev(priv);
1099
1100         switch (wValue) {
1101         case C_HUB_OVER_CURRENT:
1102         case C_HUB_LOCAL_POWER:
1103                 dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1104                 return 0;
1105         }
1106
1107         return -EPIPE;
1108 }
1109
1110 static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1111                                      u16 typeReq, u16 wValue,
1112                                      u16 wIndex, char *buf, u16 wLength)
1113 {
1114         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1115         struct device *dev = usbhs_priv_to_dev(priv);
1116         int enable = (typeReq == SetPortFeature);
1117         int speed, i, timeout = 128;
1118         int roothub_id = 1; /* only 1 root hub */
1119
1120         /* common error */
1121         if (wIndex > roothub_id || wLength != 0)
1122                 return -EPIPE;
1123
1124         /* check wValue */
1125         switch (wValue) {
1126         case USB_PORT_FEAT_POWER:
1127                 usbhs_vbus_ctrl(priv, enable);
1128                 dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1129                 break;
1130
1131         case USB_PORT_FEAT_ENABLE:
1132         case USB_PORT_FEAT_SUSPEND:
1133         case USB_PORT_FEAT_C_ENABLE:
1134         case USB_PORT_FEAT_C_SUSPEND:
1135         case USB_PORT_FEAT_C_CONNECTION:
1136         case USB_PORT_FEAT_C_OVER_CURRENT:
1137         case USB_PORT_FEAT_C_RESET:
1138                 dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1139                 break;
1140
1141         case USB_PORT_FEAT_RESET:
1142                 if (!enable)
1143                         break;
1144
1145                 usbhsh_port_stat_clear(hpriv,
1146                                        USB_PORT_STAT_HIGH_SPEED |
1147                                        USB_PORT_STAT_LOW_SPEED);
1148
1149                 usbhsh_queue_force_pop_all(priv);
1150
1151                 usbhs_bus_send_reset(priv);
1152                 msleep(20);
1153                 usbhs_bus_send_sof_enable(priv);
1154
1155                 for (i = 0; i < timeout ; i++) {
1156                         switch (usbhs_bus_get_speed(priv)) {
1157                         case USB_SPEED_LOW:
1158                                 speed = USB_PORT_STAT_LOW_SPEED;
1159                                 goto got_usb_bus_speed;
1160                         case USB_SPEED_HIGH:
1161                                 speed = USB_PORT_STAT_HIGH_SPEED;
1162                                 goto got_usb_bus_speed;
1163                         case USB_SPEED_FULL:
1164                                 speed = 0;
1165                                 goto got_usb_bus_speed;
1166                         }
1167
1168                         msleep(20);
1169                 }
1170                 return -EPIPE;
1171
1172 got_usb_bus_speed:
1173                 usbhsh_port_stat_set(hpriv, speed);
1174                 usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1175
1176                 dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1177                         __func__, speed);
1178
1179                 /* status change is not needed */
1180                 return 0;
1181
1182         default:
1183                 return -EPIPE;
1184         }
1185
1186         /* set/clear status */
1187         if (enable)
1188                 usbhsh_port_stat_set(hpriv, (1 << wValue));
1189         else
1190                 usbhsh_port_stat_clear(hpriv, (1 << wValue));
1191
1192         return 0;
1193 }
1194
1195 static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1196                                    u16 typeReq, u16 wValue,
1197                                    u16 wIndex, char *buf, u16 wLength)
1198 {
1199         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1200         struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1201         struct device *dev = usbhs_priv_to_dev(priv);
1202         int roothub_id = 1; /* only 1 root hub */
1203
1204         switch (typeReq) {
1205         case GetHubStatus:
1206                 dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1207
1208                 *buf = 0x00;
1209                 break;
1210
1211         case GetPortStatus:
1212                 if (wIndex != roothub_id)
1213                         return -EPIPE;
1214
1215                 dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1216                 *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1217                 break;
1218
1219         case GetHubDescriptor:
1220                 desc->bDescriptorType           = 0x29;
1221                 desc->bHubContrCurrent          = 0;
1222                 desc->bNbrPorts                 = roothub_id;
1223                 desc->bDescLength               = 9;
1224                 desc->bPwrOn2PwrGood            = 0;
1225                 desc->wHubCharacteristics       = cpu_to_le16(0x0011);
1226                 desc->u.hs.DeviceRemovable[0]   = (roothub_id << 1);
1227                 desc->u.hs.DeviceRemovable[1]   = ~0;
1228                 dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1229                 break;
1230         }
1231
1232         return 0;
1233 }
1234
1235 static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1236                               u16 wIndex, char *buf, u16 wLength)
1237 {
1238         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1239         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1240         struct device *dev = usbhs_priv_to_dev(priv);
1241         int ret = -EPIPE;
1242
1243         switch (typeReq) {
1244
1245         /* Hub Feature */
1246         case ClearHubFeature:
1247         case SetHubFeature:
1248                 ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1249                                                wValue, wIndex, buf, wLength);
1250                 break;
1251
1252         /* Port Feature */
1253         case SetPortFeature:
1254         case ClearPortFeature:
1255                 ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1256                                                 wValue, wIndex, buf, wLength);
1257                 break;
1258
1259         /* Get status */
1260         case GetHubStatus:
1261         case GetPortStatus:
1262         case GetHubDescriptor:
1263                 ret = __usbhsh_hub_get_status(hpriv, typeReq,
1264                                               wValue, wIndex, buf, wLength);
1265                 break;
1266         }
1267
1268         dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1269                 typeReq, ret, usbhsh_port_stat_get(hpriv));
1270
1271         return ret;
1272 }
1273
1274 static int usbhsh_bus_nop(struct usb_hcd *hcd)
1275 {
1276         /* nothing to do */
1277         return 0;
1278 }
1279
1280 static struct hc_driver usbhsh_driver = {
1281         .description =          usbhsh_hcd_name,
1282         .hcd_priv_size =        sizeof(struct usbhsh_hpriv),
1283
1284         /*
1285          * generic hardware linkage
1286          */
1287         .flags =                HCD_USB2,
1288
1289         .start =                usbhsh_host_start,
1290         .stop =                 usbhsh_host_stop,
1291
1292         /*
1293          * managing i/o requests and associated device resources
1294          */
1295         .urb_enqueue =          usbhsh_urb_enqueue,
1296         .urb_dequeue =          usbhsh_urb_dequeue,
1297         .endpoint_disable =     usbhsh_endpoint_disable,
1298
1299         /*
1300          * root hub
1301          */
1302         .hub_status_data =      usbhsh_hub_status_data,
1303         .hub_control =          usbhsh_hub_control,
1304         .bus_suspend =          usbhsh_bus_nop,
1305         .bus_resume =           usbhsh_bus_nop,
1306 };
1307
1308 /*
1309  *              interrupt functions
1310  */
1311 static int usbhsh_irq_attch(struct usbhs_priv *priv,
1312                             struct usbhs_irq_state *irq_state)
1313 {
1314         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1315         struct device *dev = usbhs_priv_to_dev(priv);
1316
1317         dev_dbg(dev, "device attached\n");
1318
1319         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1320         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1321
1322         /*
1323          * attch interrupt might happen infinitely on some device
1324          * (on self power USB hub ?)
1325          * disable it here.
1326          *
1327          * usbhsh_is_running() becomes effective
1328          * according to this process.
1329          * see
1330          *      usbhsh_is_running()
1331          *      usbhsh_urb_enqueue()
1332          */
1333         hpriv->mod.irq_attch = NULL;
1334         usbhs_irq_callback_update(priv, &hpriv->mod);
1335
1336         return 0;
1337 }
1338
1339 static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1340                            struct usbhs_irq_state *irq_state)
1341 {
1342         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1343         struct device *dev = usbhs_priv_to_dev(priv);
1344
1345         dev_dbg(dev, "device detached\n");
1346
1347         usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1348         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1349
1350         /*
1351          * enable attch interrupt again
1352          *
1353          * usbhsh_is_running() becomes invalid
1354          * according to this process.
1355          * see
1356          *      usbhsh_is_running()
1357          *      usbhsh_urb_enqueue()
1358          */
1359         hpriv->mod.irq_attch = usbhsh_irq_attch;
1360         usbhs_irq_callback_update(priv, &hpriv->mod);
1361
1362         /*
1363          * usbhsh_queue_force_pop_all() should be called
1364          * after usbhsh_is_running() becomes invalid.
1365          */
1366         usbhsh_queue_force_pop_all(priv);
1367
1368         return 0;
1369 }
1370
1371 static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1372                                 struct usbhs_irq_state *irq_state)
1373 {
1374         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1375         struct device *dev = usbhs_priv_to_dev(priv);
1376
1377         dev_dbg(dev, "setup packet OK\n");
1378
1379         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1380
1381         return 0;
1382 }
1383
1384 static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1385                                 struct usbhs_irq_state *irq_state)
1386 {
1387         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1388         struct device *dev = usbhs_priv_to_dev(priv);
1389
1390         dev_dbg(dev, "setup packet Err\n");
1391
1392         complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1393
1394         return 0;
1395 }
1396
1397 /*
1398  *              module start/stop
1399  */
1400 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1401 {
1402         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1403         struct usbhs_pipe *pipe;
1404         u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
1405         int pipe_size = usbhs_get_dparam(priv, pipe_size);
1406         int old_type, dir_in, i;
1407
1408         /* init all pipe */
1409         old_type = USB_ENDPOINT_XFER_CONTROL;
1410         for (i = 0; i < pipe_size; i++) {
1411
1412                 /*
1413                  * data "output" will be finished as soon as possible,
1414                  * but there is no guaranty at data "input" case.
1415                  *
1416                  * "input" needs "standby" pipe.
1417                  * So, "input" direction pipe > "output" direction pipe
1418                  * is good idea.
1419                  *
1420                  * 1st USB_ENDPOINT_XFER_xxx will be output direction,
1421                  * and the other will be input direction here.
1422                  *
1423                  * ex)
1424                  * ...
1425                  * USB_ENDPOINT_XFER_ISOC -> dir out
1426                  * USB_ENDPOINT_XFER_ISOC -> dir in
1427                  * USB_ENDPOINT_XFER_BULK -> dir out
1428                  * USB_ENDPOINT_XFER_BULK -> dir in
1429                  * USB_ENDPOINT_XFER_BULK -> dir in
1430                  * ...
1431                  */
1432                 dir_in = (pipe_type[i] == old_type);
1433                 old_type = pipe_type[i];
1434
1435                 if (USB_ENDPOINT_XFER_CONTROL == pipe_type[i]) {
1436                         pipe = usbhs_dcp_malloc(priv);
1437                         usbhsh_hpriv_to_dcp(hpriv) = pipe;
1438                 } else {
1439                         pipe = usbhs_pipe_malloc(priv,
1440                                                  pipe_type[i],
1441                                                  dir_in);
1442                 }
1443
1444                 pipe->mod_private = NULL;
1445         }
1446 }
1447
1448 static int usbhsh_start(struct usbhs_priv *priv)
1449 {
1450         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1451         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1452         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1453         struct device *dev = usbhs_priv_to_dev(priv);
1454         int ret;
1455
1456         /* add hcd */
1457         ret = usb_add_hcd(hcd, 0, 0);
1458         if (ret < 0)
1459                 return 0;
1460
1461         /*
1462          * pipe initialize and enable DCP
1463          */
1464         usbhs_pipe_init(priv,
1465                         usbhsh_dma_map_ctrl);
1466         usbhs_fifo_init(priv);
1467         usbhsh_pipe_init_for_host(priv);
1468
1469         /*
1470          * system config enble
1471          * - HI speed
1472          * - host
1473          * - usb module
1474          */
1475         usbhs_sys_host_ctrl(priv, 1);
1476
1477         /*
1478          * enable irq callback
1479          */
1480         mod->irq_attch          = usbhsh_irq_attch;
1481         mod->irq_dtch           = usbhsh_irq_dtch;
1482         mod->irq_sack           = usbhsh_irq_setup_ack;
1483         mod->irq_sign           = usbhsh_irq_setup_err;
1484         usbhs_irq_callback_update(priv, mod);
1485
1486         dev_dbg(dev, "start host\n");
1487
1488         return ret;
1489 }
1490
1491 static int usbhsh_stop(struct usbhs_priv *priv)
1492 {
1493         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1494         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1495         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1496         struct device *dev = usbhs_priv_to_dev(priv);
1497
1498         /*
1499          * disable irq callback
1500          */
1501         mod->irq_attch  = NULL;
1502         mod->irq_dtch   = NULL;
1503         mod->irq_sack   = NULL;
1504         mod->irq_sign   = NULL;
1505         usbhs_irq_callback_update(priv, mod);
1506
1507         usb_remove_hcd(hcd);
1508
1509         /* disable sys */
1510         usbhs_sys_host_ctrl(priv, 0);
1511
1512         dev_dbg(dev, "quit host\n");
1513
1514         return 0;
1515 }
1516
1517 int usbhs_mod_host_probe(struct usbhs_priv *priv)
1518 {
1519         struct usbhsh_hpriv *hpriv;
1520         struct usb_hcd *hcd;
1521         struct usbhsh_device *udev;
1522         struct device *dev = usbhs_priv_to_dev(priv);
1523         int i;
1524
1525         /* initialize hcd */
1526         hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1527         if (!hcd) {
1528                 dev_err(dev, "Failed to create hcd\n");
1529                 return -ENOMEM;
1530         }
1531         hcd->has_tt = 1; /* for low/full speed */
1532
1533         /*
1534          * CAUTION
1535          *
1536          * There is no guarantee that it is possible to access usb module here.
1537          * Don't accesses to it.
1538          * The accesse will be enable after "usbhsh_start"
1539          */
1540
1541         hpriv = usbhsh_hcd_to_hpriv(hcd);
1542
1543         /*
1544          * register itself
1545          */
1546         usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1547
1548         /* init hpriv */
1549         hpriv->mod.name         = "host";
1550         hpriv->mod.start        = usbhsh_start;
1551         hpriv->mod.stop         = usbhsh_stop;
1552         usbhsh_port_stat_init(hpriv);
1553
1554         /* init all device */
1555         usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1556                 udev->usbv      = NULL;
1557                 INIT_LIST_HEAD(&udev->ep_list_head);
1558         }
1559
1560         dev_info(dev, "host probed\n");
1561
1562         return 0;
1563 }
1564
1565 int usbhs_mod_host_remove(struct usbhs_priv *priv)
1566 {
1567         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1568         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1569
1570         usb_put_hcd(hcd);
1571
1572         return 0;
1573 }