drivers/usb/renesas_usbhs/mod

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This source file includes following definitions.
usbhsh_ureq_alloc
usbhsh_ureq_free
usbhsh_is_running
usbhsh_endpoint_sequence_save
usbhsh_pipe_attach
usbhsh_pipe_detach
usbhsh_endpoint_attach
usbhsh_endpoint_detach
usbhsh_endpoint_detach_all
usbhsh_connected_to_rhdev
usbhsh_device_has_endpoint
usbhsh_device_get
usbhsh_device_attach
usbhsh_device_detach
usbhsh_queue_done
usbhsh_queue_push
usbhsh_queue_force_pop
usbhsh_queue_force_pop_all
usbhsh_is_request_address
usbhsh_setup_stage_packet_push
usbhsh_data_stage_packet_done
usbhsh_data_stage_packet_push
usbhsh_status_stage_packet_push
usbhsh_dcp_queue_push
usbhsh_dma_map_ctrl
usbhsh_host_start
usbhsh_host_stop
usbhsh_urb_enqueue
usbhsh_urb_dequeue
usbhsh_endpoint_disable
usbhsh_hub_status_data
__usbhsh_hub_hub_feature
__usbhsh_hub_port_feature
__usbhsh_hub_get_status
usbhsh_hub_control
usbhsh_bus_nop
usbhsh_irq_attch
usbhsh_irq_dtch
usbhsh_irq_setup_ack
usbhsh_irq_setup_err
usbhsh_pipe_init_for_host
usbhsh_start
usbhsh_stop
usbhs_mod_host_probe
usbhs_mod_host_remove
   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  */
  64 struct usbhsh_request {
  65         struct urb              *urb;
  66         struct usbhs_pkt        pkt;
  67 };
  68 
  69 struct usbhsh_device {
  70         struct usb_device       *usbv;
  71         struct list_head        ep_list_head; /* list of usbhsh_ep */
  72 };
  73 
  74 struct 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 */
  84 struct 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 
  96 static 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  */
 155 static 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 
 172 static 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  */
 184 static 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  */
 199 static 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 
 241 static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
 242                                                struct urb *urb);
 243 
 244 static 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 
 314 usbhsh_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 
 324 static 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  */
 365 static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
 366                                   struct urb *urb,
 367                                   gfp_t mem_flags)
 368 {
 369         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 370         struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
 371         struct usb_host_endpoint *ep = urb->ep;
 372         struct usbhsh_ep *uep;
 373         struct device *dev = usbhs_priv_to_dev(priv);
 374         struct usb_endpoint_descriptor *desc = &ep->desc;
 375         unsigned long flags;
 376 
 377         uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
 378         if (!uep)
 379                 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 
 405 static 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 
 439 static 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  */
 451 static 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 
 459 static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
 460 {
 461         return !list_empty(&udev->ep_list_head);
 462 }
 463 
 464 static 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 
 482 static 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 
 585 static 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  */
 629 static 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 
 659 static int usbhsh_queue_push(struct usb_hcd *hcd,
 660                              struct urb *urb,
 661                              gfp_t mem_flags)
 662 {
 663         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 664         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 665         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 666         struct device *dev = usbhsh_hcd_to_dev(hcd);
 667         struct usbhsh_request *ureq;
 668         void *buf;
 669         int len, sequence;
 670 
 671         if (usb_pipeisoc(urb->pipe)) {
 672                 dev_err(dev, "pipe iso is not supported now\n");
 673                 return -EIO;
 674         }
 675 
 676         /* this ureq will be freed on usbhsh_queue_done() */
 677         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 678         if (unlikely(!ureq)) {
 679                 dev_err(dev, "ureq alloc fail\n");
 680                 return -ENOMEM;
 681         }
 682 
 683         if (usb_pipein(urb->pipe))
 684                 pipe->handler = &usbhs_fifo_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 
 705 static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
 706                                    struct usbhs_pipe *pipe)
 707 {
 708         struct usbhs_pkt *pkt;
 709 
 710         while (1) {
 711                 pkt = usbhs_pkt_pop(pipe, NULL);
 712                 if (!pkt)
 713                         break;
 714 
 715                 /*
 716                  * if all packet are gone, usbhsh_endpoint_disable()
 717                  * will be called.
 718                  * then, attached device/endpoint/pipe will be detached
 719                  */
 720                 usbhsh_queue_done(priv, pkt);
 721         }
 722 }
 723 
 724 static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
 725 {
 726         struct usbhs_pipe *pos;
 727         int i;
 728 
 729         usbhs_for_each_pipe_with_dcp(pos, priv, i)
 730                 usbhsh_queue_force_pop(priv, pos);
 731 }
 732 
 733 /*
 734  *              DCP setup stage
 735  */
 736 static int usbhsh_is_request_address(struct urb *urb)
 737 {
 738         struct usb_ctrlrequest *req;
 739 
 740         req = (struct usb_ctrlrequest *)urb->setup_packet;
 741 
 742         if ((DeviceOutRequest    == req->bRequestType << 8) &&
 743             (USB_REQ_SET_ADDRESS == req->bRequest))
 744                 return 1;
 745         else
 746                 return 0;
 747 }
 748 
 749 static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
 750                                            struct urb *urb,
 751                                            struct usbhs_pipe *pipe)
 752 {
 753         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
 754         struct usb_ctrlrequest req;
 755         struct device *dev = usbhs_priv_to_dev(priv);
 756 
 757         /*
 758          * wait setup packet ACK
 759          * see
 760          *      usbhsh_irq_setup_ack()
 761          *      usbhsh_irq_setup_err()
 762          */
 763         init_completion(&hpriv->setup_ack_done);
 764 
 765         /* copy original request */
 766         memcpy(&req, urb->setup_packet, sizeof(struct usb_ctrlrequest));
 767 
 768         /*
 769          * renesas_usbhs can not use original usb address.
 770          * see HARDWARE LIMITATION.
 771          * modify usb address here to use attached device.
 772          * see usbhsh_device_attach()
 773          */
 774         if (usbhsh_is_request_address(urb)) {
 775                 struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
 776                 struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
 777 
 778                 /* udev is a attached device */
 779                 req.wValue = usbhsh_device_number(hpriv, udev);
 780                 dev_dbg(dev, "create new address - %d\n", req.wValue);
 781         }
 782 
 783         /* set request */
 784         usbhs_usbreq_set_val(priv, &req);
 785 
 786         /*
 787          * wait setup packet ACK
 788          */
 789         wait_for_completion(&hpriv->setup_ack_done);
 790 
 791         dev_dbg(dev, "%s done\n", __func__);
 792 }
 793 
 794 /*
 795  *              DCP data stage
 796  */
 797 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
 798                                           struct usbhs_pkt *pkt)
 799 {
 800         struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
 801         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
 802 
 803         /* this ureq was connected to urb when usbhsh_urb_enqueue()  */
 804 
 805         usbhsh_ureq_free(hpriv, ureq);
 806 }
 807 
 808 static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
 809                                          struct urb *urb,
 810                                          struct usbhs_pipe *pipe,
 811                                          gfp_t mem_flags)
 812 
 813 {
 814         struct usbhsh_request *ureq;
 815 
 816         /* this ureq will be freed on usbhsh_data_stage_packet_done() */
 817         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 818         if (unlikely(!ureq))
 819                 return -ENOMEM;
 820 
 821         if (usb_pipein(urb->pipe))
 822                 pipe->handler = &usbhs_dcp_data_stage_in_handler;
 823         else
 824                 pipe->handler = &usbhs_dcp_data_stage_out_handler;
 825 
 826         usbhs_pkt_push(pipe, &ureq->pkt,
 827                        usbhsh_data_stage_packet_done,
 828                        urb->transfer_buffer,
 829                        urb->transfer_buffer_length,
 830                        (urb->transfer_flags & URB_ZERO_PACKET),
 831                        -1);
 832 
 833         return 0;
 834 }
 835 
 836 /*
 837  *              DCP status stage
 838  */
 839 static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
 840                                             struct urb *urb,
 841                                             struct usbhs_pipe *pipe,
 842                                             gfp_t mem_flags)
 843 {
 844         struct usbhsh_request *ureq;
 845 
 846         /* This ureq will be freed on usbhsh_queue_done() */
 847         ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
 848         if (unlikely(!ureq))
 849                 return -ENOMEM;
 850 
 851         if (usb_pipein(urb->pipe))
 852                 pipe->handler = &usbhs_dcp_status_stage_in_handler;
 853         else
 854                 pipe->handler = &usbhs_dcp_status_stage_out_handler;
 855 
 856         usbhs_pkt_push(pipe, &ureq->pkt,
 857                        usbhsh_queue_done,
 858                        NULL,
 859                        urb->transfer_buffer_length,
 860                        0, -1);
 861 
 862         return 0;
 863 }
 864 
 865 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
 866                                  struct urb *urb,
 867                                  gfp_t mflags)
 868 {
 869         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
 870         struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
 871         struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
 872         struct device *dev = usbhsh_hcd_to_dev(hcd);
 873         int ret;
 874 
 875         dev_dbg(dev, "%s\n", __func__);
 876 
 877         /*
 878          * setup stage
 879          *
 880          * usbhsh_send_setup_stage_packet() wait SACK/SIGN
 881          */
 882         usbhsh_setup_stage_packet_push(hpriv, urb, pipe);
 883 
 884         /*
 885          * data stage
 886          *
 887          * It is pushed only when urb has buffer.
 888          */
 889         if (urb->transfer_buffer_length) {
 890                 ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
 891                 if (ret < 0) {
 892                         dev_err(dev, "data stage failed\n");
 893                         return ret;
 894                 }
 895         }
 896 
 897         /*
 898          * status stage
 899          */
 900         ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
 901         if (ret < 0) {
 902                 dev_err(dev, "status stage failed\n");
 903                 return ret;
 904         }
 905 
 906         /*
 907          * start pushed packets
 908          */
 909         usbhs_pkt_start(pipe);
 910 
 911         return 0;
 912 }
 913 
 914 /*
 915  *              dma map functions
 916  */
 917 static int usbhsh_dma_map_ctrl(struct 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  */
 939 static int usbhsh_host_start(struct usb_hcd *hcd)
 940 {
 941         return 0;
 942 }
 943 
 944 static void usbhsh_host_stop(struct usb_hcd *hcd)
 945 {
 946 }
 947 
 948 static 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 
1019 usbhsh_urb_enqueue_error_free_endpoint:
1020         usbhsh_endpoint_detach(hpriv, ep);
1021 usbhsh_urb_enqueue_error_free_device:
1022         if (new_udev)
1023                 usbhsh_device_detach(hpriv, new_udev);
1024 usbhsh_urb_enqueue_error_not_linked:
1025 
1026         dev_dbg(dev, "%s error\n", __func__);
1027 
1028         return ret;
1029 }
1030 
1031 static 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 
1047 static 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 
1074 static 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 
1091 static 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 
1108 static 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 
1170 got_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 
1193 static 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 
1234 static 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 
1273 static int usbhsh_bus_nop(struct usb_hcd *hcd)
1274 {
1275         /* nothing to do */
1276         return 0;
1277 }
1278 
1279 static 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_DMA | 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  */
1310 static 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 
1338 static 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 
1370 static 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 
1383 static 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  */
1399 static 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 
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         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 
1492 static 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 
1518 int 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 
1566 int 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 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/usb/renesas_usbhs/mod_host.c

DEFINITIONS
