linux/drivers/usb/renesas_usbhs/mod_host.c
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   1// SPDX-License-Identifier: GPL-1.0+
   2/*
   3 * Renesas USB driver
   4 *
   5 * Copyright (C) 2011 Renesas Solutions Corp.
   6 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   7 */
   8#include <linux/io.h>
   9#include <linux/list.h>
  10#include <linux/module.h>
  11#include <linux/platform_device.h>
  12#include <linux/slab.h>
  13#include <linux/usb.h>
  14#include <linux/usb/hcd.h>
  15#include "common.h"
  16
  17/*
  18 *** HARDWARE LIMITATION ***
  19 *
  20 * 1) renesas_usbhs has a limited number of controllable devices.
  21 *    it can control only 9 devices in generally.
  22 *      see DEVADDn / DCPMAXP / PIPEMAXP.
  23 *
  24 * 2) renesas_usbhs pipe number is limited.
  25 *    the pipe will be re-used for each devices.
  26 *    so, software should control DATA0/1 sequence of each devices.
  27 */
  28
  29
  30/*
  31 *              image of mod_host
  32 *
  33 * +--------+
  34 * | udev 0 | --> it is used when set address
  35 * +--------+
  36 *
  37 * +--------+                                   pipes are reused for each uep.
  38 * | udev 1 |-+- [uep 0 (dcp) ] --+             pipe will be switched when
  39 * +--------+ |                   |             other device requested
  40 *            +- [uep 1 (bulk)] --|---+            +--------------+
  41 *            |                   +--------------> | pipe0 (dcp)  |
  42 *            +- [uep 2 (bulk)] -@    |            +--------------+
  43 *                                    |            | pipe1 (isoc) |
  44 * +--------+                         |            +--------------+
  45 * | udev 2 |-+- [uep 0 (dcp) ] -@    +----------> | pipe2 (bulk) |
  46 * +--------+ |                                    +--------------+
  47 *            +- [uep 1 (int) ] ----+     +------> | pipe3 (bulk) |
  48 *                                  |     |        +--------------+
  49 * +--------+                       +-----|------> | pipe4 (int)  |
  50 * | udev 3 |-+- [uep 0 (dcp) ] -@        |        +--------------+
  51 * +--------+ |                           |        | ....         |
  52 *            +- [uep 1 (bulk)] -@        |        | ....         |
  53 *            |                           |
  54 *            +- [uep 2 (bulk)]-----------+
  55 *
  56 * @ :  uep requested free pipe, but all have been used.
  57 *      now it is waiting for free pipe
  58 */
  59
  60
  61/*
  62 *              struct
  63 */
  64struct usbhsh_request {
  65        struct urb              *urb;
  66        struct usbhs_pkt        pkt;
  67};
  68
  69struct usbhsh_device {
  70        struct usb_device       *usbv;
  71        struct list_head        ep_list_head; /* list of usbhsh_ep */
  72};
  73
  74struct usbhsh_ep {
  75        struct usbhs_pipe       *pipe;   /* attached pipe */
  76        struct usbhsh_device    *udev;   /* attached udev */
  77        struct usb_host_endpoint *ep;
  78        struct list_head        ep_list; /* list to usbhsh_device */
  79        unsigned int            counter; /* pipe attach counter */
  80};
  81
  82#define USBHSH_DEVICE_MAX       10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
  83#define USBHSH_PORT_MAX          7 /* see DEVADDn :: HUBPORT */
  84struct usbhsh_hpriv {
  85        struct usbhs_mod        mod;
  86        struct usbhs_pipe       *dcp;
  87
  88        struct usbhsh_device    udev[USBHSH_DEVICE_MAX];
  89
  90        u32     port_stat;      /* USB_PORT_STAT_xxx */
  91
  92        struct completion       setup_ack_done;
  93};
  94
  95
  96static const char usbhsh_hcd_name[] = "renesas_usbhs host";
  97
  98/*
  99 *              macro
 100 */
 101#define usbhsh_priv_to_hpriv(priv) \
 102        container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
 103
 104#define __usbhsh_for_each_udev(start, pos, h, i)        \
 105        for ((i) = start;                                               \
 106             ((i) < USBHSH_DEVICE_MAX) && ((pos) = (h)->udev + (i));    \
 107             (i)++)
 108
 109#define usbhsh_for_each_udev(pos, hpriv, i)     \
 110        __usbhsh_for_each_udev(1, pos, hpriv, i)
 111
 112#define usbhsh_for_each_udev_with_dev0(pos, hpriv, i)   \
 113        __usbhsh_for_each_udev(0, pos, hpriv, i)
 114
 115#define usbhsh_hcd_to_hpriv(h)  (struct usbhsh_hpriv *)((h)->hcd_priv)
 116#define usbhsh_hcd_to_dev(h)    ((h)->self.controller)
 117
 118#define usbhsh_hpriv_to_priv(h) ((h)->mod.priv)
 119#define usbhsh_hpriv_to_dcp(h)  ((h)->dcp)
 120#define usbhsh_hpriv_to_hcd(h)  \
 121        container_of((void *)h, struct usb_hcd, hcd_priv)
 122
 123#define usbhsh_ep_to_uep(u)     ((u)->hcpriv)
 124#define usbhsh_uep_to_pipe(u)   ((u)->pipe)
 125#define usbhsh_uep_to_udev(u)   ((u)->udev)
 126#define usbhsh_uep_to_ep(u)     ((u)->ep)
 127
 128#define usbhsh_urb_to_ureq(u)   ((u)->hcpriv)
 129#define usbhsh_urb_to_usbv(u)   ((u)->dev)
 130
 131#define usbhsh_usbv_to_udev(d)  dev_get_drvdata(&(d)->dev)
 132
 133#define usbhsh_udev_to_usbv(h)  ((h)->usbv)
 134#define usbhsh_udev_is_used(h)  usbhsh_udev_to_usbv(h)
 135
 136#define usbhsh_pipe_to_uep(p)   ((p)->mod_private)
 137
 138#define usbhsh_device_parent(d)         (usbhsh_usbv_to_udev((d)->usbv->parent))
 139#define usbhsh_device_hubport(d)        ((d)->usbv->portnum)
 140#define usbhsh_device_number(h, d)      ((int)((d) - (h)->udev))
 141#define usbhsh_device_nth(h, d)         ((h)->udev + d)
 142#define usbhsh_device0(h)               usbhsh_device_nth(h, 0)
 143
 144#define usbhsh_port_stat_init(h)        ((h)->port_stat = 0)
 145#define usbhsh_port_stat_set(h, s)      ((h)->port_stat |= (s))
 146#define usbhsh_port_stat_clear(h, s)    ((h)->port_stat &= ~(s))
 147#define usbhsh_port_stat_get(h)         ((h)->port_stat)
 148
 149#define usbhsh_pkt_to_ureq(p)   \
 150        container_of((void *)p, struct usbhsh_request, pkt)
 151
 152/*
 153 *              req alloc/free
 154 */
 155static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv,
 156                                               struct urb *urb,
 157                                               gfp_t mem_flags)
 158{
 159        struct usbhsh_request *ureq;
 160
 161        ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
 162        if (!ureq)
 163                return NULL;
 164
 165        usbhs_pkt_init(&ureq->pkt);
 166        ureq->urb = urb;
 167        usbhsh_urb_to_ureq(urb) = ureq;
 168
 169        return ureq;
 170}
 171
 172static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
 173                            struct usbhsh_request *ureq)
 174{
 175        usbhsh_urb_to_ureq(ureq->urb) = NULL;
 176        ureq->urb = NULL;
 177
 178        kfree(ureq);
 179}
 180
 181/*
 182 *              status
 183 */
 184static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
 185{
 186        /*
 187         * we can decide some device is attached or not
 188         * by checking mod.irq_attch
 189         * see
 190         *      usbhsh_irq_attch()
 191         *      usbhsh_irq_dtch()
 192         */
 193        return (hpriv->mod.irq_attch == NULL);
 194}
 195
 196/*
 197 *              pipe control
 198 */
 199static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv,
 200                                          struct urb *urb,
 201                                          struct usbhs_pkt *pkt)
 202{
 203        int len = urb->actual_length;
 204        int maxp = usb_endpoint_maxp(&urb->ep->desc);
 205        int t = 0;
 206
 207        /* DCP is out of sequence control */
 208        if (usb_pipecontrol(urb->pipe))
 209                return;
 210
 211        /*
 212         * renesas_usbhs pipe has a limitation in a number.
 213         * So, driver should re-use the limited pipe for each device/endpoint.
 214         * DATA0/1 sequence should be saved for it.
 215         * see [image of mod_host]
 216         *     [HARDWARE LIMITATION]
 217         */
 218
 219        /*
 220         * next sequence depends on actual_length
 221         *
 222         * ex) actual_length = 1147, maxp = 512
 223         * data0 : 512
 224         * data1 : 512
 225         * data0 : 123
 226         * data1 is the next sequence
 227         */
 228        t = len / maxp;
 229        if (len % maxp)
 230                t++;
 231        if (pkt->zero)
 232                t++;
 233        t %= 2;
 234
 235        if (t)
 236                usb_dotoggle(urb->dev,
 237                             usb_pipeendpoint(urb->pipe),
 238                             usb_pipeout(urb->pipe));
 239}
 240
 241static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
 242                                               struct urb *urb);
 243
 244static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
 245                              struct urb *urb)
 246{
 247        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 248        struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 249        struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
 250        struct usbhs_pipe *pipe;
 251        struct usb_endpoint_descriptor *desc = &urb->ep->desc;
 252        struct device *dev = usbhs_priv_to_dev(priv);
 253        unsigned long flags;
 254        int dir_in_req = !!usb_pipein(urb->pipe);
 255        int is_dcp = usb_endpoint_xfer_control(desc);
 256        int i, dir_in;
 257        int ret = -EBUSY;
 258
 259        /********************  spin lock ********************/
 260        usbhs_lock(priv, flags);
 261
 262        /*
 263         * if uep has been attached to pipe,
 264         * reuse it
 265         */
 266        if (usbhsh_uep_to_pipe(uep)) {
 267                ret = 0;
 268                goto usbhsh_pipe_attach_done;
 269        }
 270
 271        usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 272
 273                /* check pipe type */
 274                if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
 275                        continue;
 276
 277                /* check pipe direction if normal pipe */
 278                if (!is_dcp) {
 279                        dir_in = !!usbhs_pipe_is_dir_in(pipe);
 280                        if (0 != (dir_in - dir_in_req))
 281                                continue;
 282                }
 283
 284                /* check pipe is free */
 285                if (usbhsh_pipe_to_uep(pipe))
 286                        continue;
 287
 288                /*
 289                 * attach pipe to uep
 290                 *
 291                 * usbhs_pipe_config_update() should be called after
 292                 * usbhs_set_device_config()
 293                 * see
 294                 *  DCPMAXP/PIPEMAXP
 295                 */
 296                usbhsh_uep_to_pipe(uep)         = pipe;
 297                usbhsh_pipe_to_uep(pipe)        = uep;
 298
 299                usbhs_pipe_config_update(pipe,
 300                                         usbhsh_device_number(hpriv, udev),
 301                                         usb_endpoint_num(desc),
 302                                         usb_endpoint_maxp(desc));
 303
 304                dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
 305                        usbhsh_device_number(hpriv, udev),
 306                        usb_endpoint_num(desc),
 307                        usbhs_pipe_name(pipe),
 308                        dir_in_req ? "in" : "out");
 309
 310                ret = 0;
 311                break;
 312        }
 313
 314usbhsh_pipe_attach_done:
 315        if (0 == ret)
 316                uep->counter++;
 317
 318        usbhs_unlock(priv, flags);
 319        /********************  spin unlock ******************/
 320
 321        return ret;
 322}
 323
 324static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
 325                               struct usbhsh_ep *uep)
 326{
 327        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 328        struct usbhs_pipe *pipe;
 329        struct device *dev = usbhs_priv_to_dev(priv);
 330        unsigned long flags;
 331
 332        if (unlikely(!uep)) {
 333                dev_err(dev, "no uep\n");
 334                return;
 335        }
 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 doesn't have pipe\n");
 344        } else if (1 == uep->counter--) { /* last user */
 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 */
 365static 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                return -ENOMEM;
 380
 381        /********************  spin lock ********************/
 382        usbhs_lock(priv, flags);
 383
 384        /*
 385         * init endpoint
 386         */
 387        uep->counter = 0;
 388        INIT_LIST_HEAD(&uep->ep_list);
 389        list_add_tail(&uep->ep_list, &udev->ep_list_head);
 390
 391        usbhsh_uep_to_udev(uep) = udev;
 392        usbhsh_uep_to_ep(uep)   = ep;
 393        usbhsh_ep_to_uep(ep)    = uep;
 394
 395        usbhs_unlock(priv, flags);
 396        /********************  spin unlock ******************/
 397
 398        dev_dbg(dev, "%s [%d-%d]\n", __func__,
 399                usbhsh_device_number(hpriv, udev),
 400                usb_endpoint_num(desc));
 401
 402        return 0;
 403}
 404
 405static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
 406                                   struct usb_host_endpoint *ep)
 407{
 408        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 409        struct device *dev = usbhs_priv_to_dev(priv);
 410        struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
 411        unsigned long flags;
 412
 413        if (!uep)
 414                return;
 415
 416        dev_dbg(dev, "%s [%d-%d]\n", __func__,
 417                usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
 418                usb_endpoint_num(&ep->desc));
 419
 420        if (usbhsh_uep_to_pipe(uep))
 421                usbhsh_pipe_detach(hpriv, uep);
 422
 423        /********************  spin lock ********************/
 424        usbhs_lock(priv, flags);
 425
 426        /* remove this endpoint from udev */
 427        list_del_init(&uep->ep_list);
 428
 429        usbhsh_uep_to_udev(uep) = NULL;
 430        usbhsh_uep_to_ep(uep)   = NULL;
 431        usbhsh_ep_to_uep(ep)    = NULL;
 432
 433        usbhs_unlock(priv, flags);
 434        /********************  spin unlock ******************/
 435
 436        kfree(uep);
 437}
 438
 439static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
 440                                       struct usbhsh_device *udev)
 441{
 442        struct usbhsh_ep *uep, *next;
 443
 444        list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
 445                usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
 446}
 447
 448/*
 449 *              device control
 450 */
 451static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
 452                                     struct usbhsh_device *udev)
 453{
 454        struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
 455
 456        return hcd->self.root_hub == usbv->parent;
 457}
 458
 459static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
 460{
 461        return !list_empty(&udev->ep_list_head);
 462}
 463
 464static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
 465                                               struct urb *urb)
 466{
 467        struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 468        struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 469
 470        /* usbhsh_device_attach() is still not called */
 471        if (!udev)
 472                return NULL;
 473
 474        /* if it is device0, return it */
 475        if (0 == usb_pipedevice(urb->pipe))
 476                return usbhsh_device0(hpriv);
 477
 478        /* return attached device */
 479        return udev;
 480}
 481
 482static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
 483                                                 struct urb *urb)
 484{
 485        struct usbhsh_device *udev = NULL;
 486        struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
 487        struct usbhsh_device *pos;
 488        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 489        struct device *dev = usbhsh_hcd_to_dev(hcd);
 490        struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 491        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 492        unsigned long flags;
 493        u16 upphub, hubport;
 494        int i;
 495
 496        /*
 497         * This function should be called only while urb is pointing to device0.
 498         * It will attach unused usbhsh_device to urb (usbv),
 499         * and initialize device0.
 500         * You can use usbhsh_device_get() to get "current" udev,
 501         * and usbhsh_usbv_to_udev() is for "attached" udev.
 502         */
 503        if (0 != usb_pipedevice(urb->pipe)) {
 504                dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
 505                return NULL;
 506        }
 507
 508        /********************  spin lock ********************/
 509        usbhs_lock(priv, flags);
 510
 511        /*
 512         * find unused device
 513         */
 514        usbhsh_for_each_udev(pos, hpriv, i) {
 515                if (usbhsh_udev_is_used(pos))
 516                        continue;
 517                udev = pos;
 518                break;
 519        }
 520
 521        if (udev) {
 522                /*
 523                 * usbhsh_usbv_to_udev()
 524                 * usbhsh_udev_to_usbv()
 525                 * will be enable
 526                 */
 527                dev_set_drvdata(&usbv->dev, udev);
 528                udev->usbv = usbv;
 529        }
 530
 531        usbhs_unlock(priv, flags);
 532        /********************  spin unlock ******************/
 533
 534        if (!udev) {
 535                dev_err(dev, "no free usbhsh_device\n");
 536                return NULL;
 537        }
 538
 539        if (usbhsh_device_has_endpoint(udev)) {
 540                dev_warn(dev, "udev have old endpoint\n");
 541                usbhsh_endpoint_detach_all(hpriv, udev);
 542        }
 543
 544        if (usbhsh_device_has_endpoint(udev0)) {
 545                dev_warn(dev, "udev0 have old endpoint\n");
 546                usbhsh_endpoint_detach_all(hpriv, udev0);
 547        }
 548
 549        /* uep will be attached */
 550        INIT_LIST_HEAD(&udev0->ep_list_head);
 551        INIT_LIST_HEAD(&udev->ep_list_head);
 552
 553        /*
 554         * set device0 config
 555         */
 556        usbhs_set_device_config(priv,
 557                                0, 0, 0, usbv->speed);
 558
 559        /*
 560         * set new device config
 561         */
 562        upphub  = 0;
 563        hubport = 0;
 564        if (!usbhsh_connected_to_rhdev(hcd, udev)) {
 565                /* if udev is not connected to rhdev, it means parent is Hub */
 566                struct usbhsh_device *parent = usbhsh_device_parent(udev);
 567
 568                upphub  = usbhsh_device_number(hpriv, parent);
 569                hubport = usbhsh_device_hubport(udev);
 570
 571                dev_dbg(dev, "%s connected to Hub [%d:%d](%p)\n", __func__,
 572                        upphub, hubport, parent);
 573        }
 574
 575        usbhs_set_device_config(priv,
 576                               usbhsh_device_number(hpriv, udev),
 577                               upphub, hubport, usbv->speed);
 578
 579        dev_dbg(dev, "%s [%d](%p)\n", __func__,
 580                usbhsh_device_number(hpriv, udev), udev);
 581
 582        return udev;
 583}
 584
 585static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
 586                               struct usbhsh_device *udev)
 587{
 588        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 589        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 590        struct device *dev = usbhsh_hcd_to_dev(hcd);
 591        struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
 592        unsigned long flags;
 593
 594        dev_dbg(dev, "%s [%d](%p)\n", __func__,
 595                usbhsh_device_number(hpriv, udev), udev);
 596
 597        if (usbhsh_device_has_endpoint(udev)) {
 598                dev_warn(dev, "udev still have endpoint\n");
 599                usbhsh_endpoint_detach_all(hpriv, udev);
 600        }
 601
 602        /*
 603         * There is nothing to do if it is device0.
 604         * see
 605         *  usbhsh_device_attach()
 606         *  usbhsh_device_get()
 607         */
 608        if (0 == usbhsh_device_number(hpriv, udev))
 609                return;
 610
 611        /********************  spin lock ********************/
 612        usbhs_lock(priv, flags);
 613
 614        /*
 615         * usbhsh_usbv_to_udev()
 616         * usbhsh_udev_to_usbv()
 617         * will be disable
 618         */
 619        dev_set_drvdata(&usbv->dev, NULL);
 620        udev->usbv = NULL;
 621
 622        usbhs_unlock(priv, flags);
 623        /********************  spin unlock ******************/
 624}
 625
 626/*
 627 *              queue push/pop
 628 */
 629static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
 630{
 631        struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 632        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 633        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 634        struct urb *urb = ureq->urb;
 635        struct device *dev = usbhs_priv_to_dev(priv);
 636        int status = 0;
 637
 638        dev_dbg(dev, "%s\n", __func__);
 639
 640        if (!urb) {
 641                dev_warn(dev, "pkt doesn't have urb\n");
 642                return;
 643        }
 644
 645        if (!usbhsh_is_running(hpriv))
 646                status = -ESHUTDOWN;
 647
 648        urb->actual_length = pkt->actual;
 649
 650        usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
 651        usbhsh_ureq_free(hpriv, ureq);
 652
 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
 659static 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_dma_pop_handler;
 685        else
 686                pipe->handler = &usbhs_fifo_dma_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
 705static 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
 724static 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 */
 736static 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
 749static 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 */
 797static 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
 808static 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 */
 839static 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
 865static 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 */
 917static int usbhsh_dma_map_ctrl(struct device *dma_dev, struct usbhs_pkt *pkt,
 918                               int map)
 919{
 920        if (map) {
 921                struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 922                struct urb *urb = ureq->urb;
 923
 924                /* it can not use scatter/gather */
 925                if (urb->num_sgs)
 926                        return -EINVAL;
 927
 928                pkt->dma = urb->transfer_dma;
 929                if (!pkt->dma)
 930                        return -EINVAL;
 931        }
 932
 933        return 0;
 934}
 935
 936/*
 937 *              for hc_driver
 938 */
 939static int usbhsh_host_start(struct usb_hcd *hcd)
 940{
 941        return 0;
 942}
 943
 944static void usbhsh_host_stop(struct usb_hcd *hcd)
 945{
 946}
 947
 948static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
 949                              struct urb *urb,
 950                              gfp_t mem_flags)
 951{
 952        struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 953        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 954        struct device *dev = usbhs_priv_to_dev(priv);
 955        struct usb_host_endpoint *ep = urb->ep;
 956        struct usbhsh_device *new_udev = NULL;
 957        int is_dir_in = usb_pipein(urb->pipe);
 958        int ret;
 959
 960        dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
 961
 962        if (!usbhsh_is_running(hpriv)) {
 963                ret = -EIO;
 964                dev_err(dev, "host is not running\n");
 965                goto usbhsh_urb_enqueue_error_not_linked;
 966        }
 967
 968        ret = usb_hcd_link_urb_to_ep(hcd, urb);
 969        if (ret) {
 970                dev_err(dev, "urb link failed\n");
 971                goto usbhsh_urb_enqueue_error_not_linked;
 972        }
 973
 974        /*
 975         * attach udev if needed
 976         * see [image of mod_host]
 977         */
 978        if (!usbhsh_device_get(hpriv, urb)) {
 979                new_udev = usbhsh_device_attach(hpriv, urb);
 980                if (!new_udev) {
 981                        ret = -EIO;
 982                        dev_err(dev, "device attach failed\n");
 983                        goto usbhsh_urb_enqueue_error_not_linked;
 984                }
 985        }
 986
 987        /*
 988         * attach endpoint if needed
 989         * see [image of mod_host]
 990         */
 991        if (!usbhsh_ep_to_uep(ep)) {
 992                ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
 993                if (ret < 0) {
 994                        dev_err(dev, "endpoint attach failed\n");
 995                        goto usbhsh_urb_enqueue_error_free_device;
 996                }
 997        }
 998
 999        /*
1000         * attach pipe to endpoint
1001         * see [image of mod_host]
1002         */
1003        ret = usbhsh_pipe_attach(hpriv, urb);
1004        if (ret < 0) {
1005                dev_err(dev, "pipe attach failed\n");
1006                goto usbhsh_urb_enqueue_error_free_endpoint;
1007        }
1008
1009        /*
1010         * push packet
1011         */
1012        if (usb_pipecontrol(urb->pipe))
1013                ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
1014        else
1015                ret = usbhsh_queue_push(hcd, urb, mem_flags);
1016
1017        return ret;
1018
1019usbhsh_urb_enqueue_error_free_endpoint:
1020        usbhsh_endpoint_detach(hpriv, ep);
1021usbhsh_urb_enqueue_error_free_device:
1022        if (new_udev)
1023                usbhsh_device_detach(hpriv, new_udev);
1024usbhsh_urb_enqueue_error_not_linked:
1025
1026        dev_dbg(dev, "%s error\n", __func__);
1027
1028        return ret;
1029}
1030
1031static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1032{
1033        struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1034        struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
1035
1036        if (ureq) {
1037                struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1038                struct usbhs_pkt *pkt = &ureq->pkt;
1039
1040                usbhs_pkt_pop(pkt->pipe, pkt);
1041                usbhsh_queue_done(priv, pkt);
1042        }
1043
1044        return 0;
1045}
1046
1047static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
1048                                    struct usb_host_endpoint *ep)
1049{
1050        struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
1051        struct usbhsh_device *udev;
1052        struct usbhsh_hpriv *hpriv;
1053
1054        /*
1055         * this function might be called manytimes by same hcd/ep
1056         * in-endpoint == out-endpoint if ep == dcp.
1057         */
1058        if (!uep)
1059                return;
1060
1061        udev    = usbhsh_uep_to_udev(uep);
1062        hpriv   = usbhsh_hcd_to_hpriv(hcd);
1063
1064        usbhsh_endpoint_detach(hpriv, ep);
1065
1066        /*
1067         * if there is no endpoint,
1068         * free device
1069         */
1070        if (!usbhsh_device_has_endpoint(udev))
1071                usbhsh_device_detach(hpriv, udev);
1072}
1073
1074static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
1075{
1076        struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
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        return !!(*buf);
1089}
1090
1091static int __usbhsh_hub_hub_feature(struct usbhsh_hpriv *hpriv,
1092                                    u16 typeReq, u16 wValue,
1093                                    u16 wIndex, char *buf, u16 wLength)
1094{
1095        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1096        struct device *dev = usbhs_priv_to_dev(priv);
1097
1098        switch (wValue) {
1099        case C_HUB_OVER_CURRENT:
1100        case C_HUB_LOCAL_POWER:
1101                dev_dbg(dev, "%s :: C_HUB_xx\n", __func__);
1102                return 0;
1103        }
1104
1105        return -EPIPE;
1106}
1107
1108static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
1109                                     u16 typeReq, u16 wValue,
1110                                     u16 wIndex, char *buf, u16 wLength)
1111{
1112        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1113        struct device *dev = usbhs_priv_to_dev(priv);
1114        int enable = (typeReq == SetPortFeature);
1115        int speed, i, timeout = 128;
1116        int roothub_id = 1; /* only 1 root hub */
1117
1118        /* common error */
1119        if (wIndex > roothub_id || wLength != 0)
1120                return -EPIPE;
1121
1122        /* check wValue */
1123        switch (wValue) {
1124        case USB_PORT_FEAT_POWER:
1125                usbhs_vbus_ctrl(priv, enable);
1126                dev_dbg(dev, "%s :: USB_PORT_FEAT_POWER\n", __func__);
1127                break;
1128
1129        case USB_PORT_FEAT_ENABLE:
1130        case USB_PORT_FEAT_SUSPEND:
1131        case USB_PORT_FEAT_C_ENABLE:
1132        case USB_PORT_FEAT_C_SUSPEND:
1133        case USB_PORT_FEAT_C_CONNECTION:
1134        case USB_PORT_FEAT_C_OVER_CURRENT:
1135        case USB_PORT_FEAT_C_RESET:
1136                dev_dbg(dev, "%s :: USB_PORT_FEAT_xxx\n", __func__);
1137                break;
1138
1139        case USB_PORT_FEAT_RESET:
1140                if (!enable)
1141                        break;
1142
1143                usbhsh_port_stat_clear(hpriv,
1144                                       USB_PORT_STAT_HIGH_SPEED |
1145                                       USB_PORT_STAT_LOW_SPEED);
1146
1147                usbhsh_queue_force_pop_all(priv);
1148
1149                usbhs_bus_send_reset(priv);
1150                msleep(20);
1151                usbhs_bus_send_sof_enable(priv);
1152
1153                for (i = 0; i < timeout ; i++) {
1154                        switch (usbhs_bus_get_speed(priv)) {
1155                        case USB_SPEED_LOW:
1156                                speed = USB_PORT_STAT_LOW_SPEED;
1157                                goto got_usb_bus_speed;
1158                        case USB_SPEED_HIGH:
1159                                speed = USB_PORT_STAT_HIGH_SPEED;
1160                                goto got_usb_bus_speed;
1161                        case USB_SPEED_FULL:
1162                                speed = 0;
1163                                goto got_usb_bus_speed;
1164                        }
1165
1166                        msleep(20);
1167                }
1168                return -EPIPE;
1169
1170got_usb_bus_speed:
1171                usbhsh_port_stat_set(hpriv, speed);
1172                usbhsh_port_stat_set(hpriv, USB_PORT_STAT_ENABLE);
1173
1174                dev_dbg(dev, "%s :: USB_PORT_FEAT_RESET (speed = %d)\n",
1175                        __func__, speed);
1176
1177                /* status change is not needed */
1178                return 0;
1179
1180        default:
1181                return -EPIPE;
1182        }
1183
1184        /* set/clear status */
1185        if (enable)
1186                usbhsh_port_stat_set(hpriv, (1 << wValue));
1187        else
1188                usbhsh_port_stat_clear(hpriv, (1 << wValue));
1189
1190        return 0;
1191}
1192
1193static int __usbhsh_hub_get_status(struct usbhsh_hpriv *hpriv,
1194                                   u16 typeReq, u16 wValue,
1195                                   u16 wIndex, char *buf, u16 wLength)
1196{
1197        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1198        struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
1199        struct device *dev = usbhs_priv_to_dev(priv);
1200        int roothub_id = 1; /* only 1 root hub */
1201
1202        switch (typeReq) {
1203        case GetHubStatus:
1204                dev_dbg(dev, "%s :: GetHubStatus\n", __func__);
1205
1206                *buf = 0x00;
1207                break;
1208
1209        case GetPortStatus:
1210                if (wIndex != roothub_id)
1211                        return -EPIPE;
1212
1213                dev_dbg(dev, "%s :: GetPortStatus\n", __func__);
1214                *(__le32 *)buf = cpu_to_le32(usbhsh_port_stat_get(hpriv));
1215                break;
1216
1217        case GetHubDescriptor:
1218                desc->bDescriptorType           = USB_DT_HUB;
1219                desc->bHubContrCurrent          = 0;
1220                desc->bNbrPorts                 = roothub_id;
1221                desc->bDescLength               = 9;
1222                desc->bPwrOn2PwrGood            = 0;
1223                desc->wHubCharacteristics       =
1224                        cpu_to_le16(HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM);
1225                desc->u.hs.DeviceRemovable[0]   = (roothub_id << 1);
1226                desc->u.hs.DeviceRemovable[1]   = ~0;
1227                dev_dbg(dev, "%s :: GetHubDescriptor\n", __func__);
1228                break;
1229        }
1230
1231        return 0;
1232}
1233
1234static int usbhsh_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
1235                              u16 wIndex, char *buf, u16 wLength)
1236{
1237        struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
1238        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
1239        struct device *dev = usbhs_priv_to_dev(priv);
1240        int ret = -EPIPE;
1241
1242        switch (typeReq) {
1243
1244        /* Hub Feature */
1245        case ClearHubFeature:
1246        case SetHubFeature:
1247                ret = __usbhsh_hub_hub_feature(hpriv, typeReq,
1248                                               wValue, wIndex, buf, wLength);
1249                break;
1250
1251        /* Port Feature */
1252        case SetPortFeature:
1253        case ClearPortFeature:
1254                ret = __usbhsh_hub_port_feature(hpriv, typeReq,
1255                                                wValue, wIndex, buf, wLength);
1256                break;
1257
1258        /* Get status */
1259        case GetHubStatus:
1260        case GetPortStatus:
1261        case GetHubDescriptor:
1262                ret = __usbhsh_hub_get_status(hpriv, typeReq,
1263                                              wValue, wIndex, buf, wLength);
1264                break;
1265        }
1266
1267        dev_dbg(dev, "typeReq = %x, ret = %d, port_stat = %x\n",
1268                typeReq, ret, usbhsh_port_stat_get(hpriv));
1269
1270        return ret;
1271}
1272
1273static int usbhsh_bus_nop(struct usb_hcd *hcd)
1274{
1275        /* nothing to do */
1276        return 0;
1277}
1278
1279static const struct hc_driver usbhsh_driver = {
1280        .description =          usbhsh_hcd_name,
1281        .hcd_priv_size =        sizeof(struct usbhsh_hpriv),
1282
1283        /*
1284         * generic hardware linkage
1285         */
1286        .flags =                HCD_USB2,
1287
1288        .start =                usbhsh_host_start,
1289        .stop =                 usbhsh_host_stop,
1290
1291        /*
1292         * managing i/o requests and associated device resources
1293         */
1294        .urb_enqueue =          usbhsh_urb_enqueue,
1295        .urb_dequeue =          usbhsh_urb_dequeue,
1296        .endpoint_disable =     usbhsh_endpoint_disable,
1297
1298        /*
1299         * root hub
1300         */
1301        .hub_status_data =      usbhsh_hub_status_data,
1302        .hub_control =          usbhsh_hub_control,
1303        .bus_suspend =          usbhsh_bus_nop,
1304        .bus_resume =           usbhsh_bus_nop,
1305};
1306
1307/*
1308 *              interrupt functions
1309 */
1310static int usbhsh_irq_attch(struct usbhs_priv *priv,
1311                            struct usbhs_irq_state *irq_state)
1312{
1313        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1314        struct device *dev = usbhs_priv_to_dev(priv);
1315
1316        dev_dbg(dev, "device attached\n");
1317
1318        usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
1319        usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1320
1321        /*
1322         * attch interrupt might happen infinitely on some device
1323         * (on self power USB hub ?)
1324         * disable it here.
1325         *
1326         * usbhsh_is_running() becomes effective
1327         * according to this process.
1328         * see
1329         *      usbhsh_is_running()
1330         *      usbhsh_urb_enqueue()
1331         */
1332        hpriv->mod.irq_attch = NULL;
1333        usbhs_irq_callback_update(priv, &hpriv->mod);
1334
1335        return 0;
1336}
1337
1338static int usbhsh_irq_dtch(struct usbhs_priv *priv,
1339                           struct usbhs_irq_state *irq_state)
1340{
1341        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1342        struct device *dev = usbhs_priv_to_dev(priv);
1343
1344        dev_dbg(dev, "device detached\n");
1345
1346        usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
1347        usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
1348
1349        /*
1350         * enable attch interrupt again
1351         *
1352         * usbhsh_is_running() becomes invalid
1353         * according to this process.
1354         * see
1355         *      usbhsh_is_running()
1356         *      usbhsh_urb_enqueue()
1357         */
1358        hpriv->mod.irq_attch = usbhsh_irq_attch;
1359        usbhs_irq_callback_update(priv, &hpriv->mod);
1360
1361        /*
1362         * usbhsh_queue_force_pop_all() should be called
1363         * after usbhsh_is_running() becomes invalid.
1364         */
1365        usbhsh_queue_force_pop_all(priv);
1366
1367        return 0;
1368}
1369
1370static int usbhsh_irq_setup_ack(struct usbhs_priv *priv,
1371                                struct usbhs_irq_state *irq_state)
1372{
1373        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1374        struct device *dev = usbhs_priv_to_dev(priv);
1375
1376        dev_dbg(dev, "setup packet OK\n");
1377
1378        complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1379
1380        return 0;
1381}
1382
1383static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
1384                                struct usbhs_irq_state *irq_state)
1385{
1386        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1387        struct device *dev = usbhs_priv_to_dev(priv);
1388
1389        dev_dbg(dev, "setup packet Err\n");
1390
1391        complete(&hpriv->setup_ack_done); /* see usbhsh_urb_enqueue() */
1392
1393        return 0;
1394}
1395
1396/*
1397 *              module start/stop
1398 */
1399static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
1400{
1401        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1402        struct usbhs_pipe *pipe;
1403        struct renesas_usbhs_driver_pipe_config *pipe_configs =
1404                                        usbhs_get_dparam(priv, pipe_configs);
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_configs[i].type == old_type);
1433                old_type = pipe_configs[i].type;
1434
1435                if (USB_ENDPOINT_XFER_CONTROL == pipe_configs[i].type) {
1436                        pipe = usbhs_dcp_malloc(priv);
1437                        usbhsh_hpriv_to_dcp(hpriv) = pipe;
1438                } else {
1439                        pipe = usbhs_pipe_malloc(priv,
1440                                                 pipe_configs[i].type,
1441                                                 dir_in);
1442                }
1443
1444                pipe->mod_private = NULL;
1445        }
1446}
1447
1448static 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        device_wakeup_enable(hcd->self.controller);
1461
1462        /*
1463         * pipe initialize and enable DCP
1464         */
1465        usbhs_fifo_init(priv);
1466        usbhs_pipe_init(priv,
1467                        usbhsh_dma_map_ctrl);
1468        usbhsh_pipe_init_for_host(priv);
1469
1470        /*
1471         * system config enble
1472         * - HI speed
1473         * - host
1474         * - usb module
1475         */
1476        usbhs_sys_host_ctrl(priv, 1);
1477
1478        /*
1479         * enable irq callback
1480         */
1481        mod->irq_attch          = usbhsh_irq_attch;
1482        mod->irq_dtch           = usbhsh_irq_dtch;
1483        mod->irq_sack           = usbhsh_irq_setup_ack;
1484        mod->irq_sign           = usbhsh_irq_setup_err;
1485        usbhs_irq_callback_update(priv, mod);
1486
1487        dev_dbg(dev, "start host\n");
1488
1489        return ret;
1490}
1491
1492static int usbhsh_stop(struct usbhs_priv *priv)
1493{
1494        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1495        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1496        struct usbhs_mod *mod = usbhs_mod_get_current(priv);
1497        struct device *dev = usbhs_priv_to_dev(priv);
1498
1499        /*
1500         * disable irq callback
1501         */
1502        mod->irq_attch  = NULL;
1503        mod->irq_dtch   = NULL;
1504        mod->irq_sack   = NULL;
1505        mod->irq_sign   = NULL;
1506        usbhs_irq_callback_update(priv, mod);
1507
1508        usb_remove_hcd(hcd);
1509
1510        /* disable sys */
1511        usbhs_sys_host_ctrl(priv, 0);
1512
1513        dev_dbg(dev, "quit host\n");
1514
1515        return 0;
1516}
1517
1518int usbhs_mod_host_probe(struct usbhs_priv *priv)
1519{
1520        struct usbhsh_hpriv *hpriv;
1521        struct usb_hcd *hcd;
1522        struct usbhsh_device *udev;
1523        struct device *dev = usbhs_priv_to_dev(priv);
1524        int i;
1525
1526        /* initialize hcd */
1527        hcd = usb_create_hcd(&usbhsh_driver, dev, usbhsh_hcd_name);
1528        if (!hcd) {
1529                dev_err(dev, "Failed to create hcd\n");
1530                return -ENOMEM;
1531        }
1532        hcd->has_tt = 1; /* for low/full speed */
1533
1534        /*
1535         * CAUTION
1536         *
1537         * There is no guarantee that it is possible to access usb module here.
1538         * Don't accesses to it.
1539         * The accesse will be enable after "usbhsh_start"
1540         */
1541
1542        hpriv = usbhsh_hcd_to_hpriv(hcd);
1543
1544        /*
1545         * register itself
1546         */
1547        usbhs_mod_register(priv, &hpriv->mod, USBHS_HOST);
1548
1549        /* init hpriv */
1550        hpriv->mod.name         = "host";
1551        hpriv->mod.start        = usbhsh_start;
1552        hpriv->mod.stop         = usbhsh_stop;
1553        usbhsh_port_stat_init(hpriv);
1554
1555        /* init all device */
1556        usbhsh_for_each_udev_with_dev0(udev, hpriv, i) {
1557                udev->usbv      = NULL;
1558                INIT_LIST_HEAD(&udev->ep_list_head);
1559        }
1560
1561        dev_info(dev, "host probed\n");
1562
1563        return 0;
1564}
1565
1566int usbhs_mod_host_remove(struct usbhs_priv *priv)
1567{
1568        struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
1569        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
1570
1571        usb_put_hcd(hcd);
1572
1573        return 0;
1574}
1575