drivers/staging/octeon-usb/octeon-hcd.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2008 Cavium Networks
   7  */
   8 #include <linux/kernel.h>
   9 #include <linux/module.h>
  10 #include <linux/init.h>
  11 #include <linux/pci.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/usb.h>
  15
  16 #include <linux/time.h>
  17 #include <linux/delay.h>
  18
  19 #include <asm/octeon/cvmx.h>
  20 #include "cvmx-usb.h"
  21 #include <asm/octeon/cvmx-iob-defs.h>
  22
  23 #include <linux/usb/hcd.h>
  24
  25 #include <linux/err.h>
  26
  27 struct octeon_hcd {
  28         spinlock_t lock;
  29         cvmx_usb_state_t usb;
  30         struct tasklet_struct dequeue_tasklet;
  31         struct list_head dequeue_list;
  32 };
  33
  34 /* convert between an HCD pointer and the corresponding struct octeon_hcd */
  35 static inline struct octeon_hcd *hcd_to_octeon(struct usb_hcd *hcd)
  36 {
  37         return (struct octeon_hcd *)(hcd->hcd_priv);
  38 }
  39
  40 static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p)
  41 {
  42         return container_of((void *)p, struct usb_hcd, hcd_priv);
  43 }
  44
  45 static inline struct octeon_hcd *cvmx_usb_to_octeon(cvmx_usb_state_t *p)
  46 {
  47         return container_of(p, struct octeon_hcd, usb);
  48 }
  49
  50 static irqreturn_t octeon_usb_irq(struct usb_hcd *hcd)
  51 {
  52         struct octeon_hcd *priv = hcd_to_octeon(hcd);
  53         unsigned long flags;
  54
  55         spin_lock_irqsave(&priv->lock, flags);
  56         cvmx_usb_poll(&priv->usb);
  57         spin_unlock_irqrestore(&priv->lock, flags);
  58         return IRQ_HANDLED;
  59 }
  60
  61 static void octeon_usb_port_callback(cvmx_usb_state_t *usb,
  62                                      cvmx_usb_callback_t reason,
  63                                      cvmx_usb_complete_t status,
  64                                      int pipe_handle,
  65                                      int submit_handle,
  66                                      int bytes_transferred,
  67                                      void *user_data)
  68 {
  69         struct octeon_hcd *priv = cvmx_usb_to_octeon(usb);
  70
  71         spin_unlock(&priv->lock);
  72         usb_hcd_poll_rh_status(octeon_to_hcd(priv));
  73         spin_lock(&priv->lock);
  74 }
  75
  76 static int octeon_usb_start(struct usb_hcd *hcd)
  77 {
  78         struct octeon_hcd *priv = hcd_to_octeon(hcd);
  79         unsigned long flags;
  80
  81         hcd->state = HC_STATE_RUNNING;
  82         spin_lock_irqsave(&priv->lock, flags);
  83         cvmx_usb_register_callback(&priv->usb, CVMX_USB_CALLBACK_PORT_CHANGED,
  84                                    octeon_usb_port_callback, NULL);
  85         spin_unlock_irqrestore(&priv->lock, flags);
  86         return 0;
  87 }
  88
  89 static void octeon_usb_stop(struct usb_hcd *hcd)
  90 {
  91         struct octeon_hcd *priv = hcd_to_octeon(hcd);
  92         unsigned long flags;
  93
  94         spin_lock_irqsave(&priv->lock, flags);
  95         cvmx_usb_register_callback(&priv->usb, CVMX_USB_CALLBACK_PORT_CHANGED,
  96                                    NULL, NULL);
  97         spin_unlock_irqrestore(&priv->lock, flags);
  98         hcd->state = HC_STATE_HALT;
  99 }
 100
 101 static int octeon_usb_get_frame_number(struct usb_hcd *hcd)
 102 {
 103         struct octeon_hcd *priv = hcd_to_octeon(hcd);
 104
 105         return cvmx_usb_get_frame_number(&priv->usb);
 106 }
 107
 108 static void octeon_usb_urb_complete_callback(cvmx_usb_state_t *usb,
 109                                              cvmx_usb_callback_t reason,
 110                                              cvmx_usb_complete_t status,
 111                                              int pipe_handle,
 112                                              int submit_handle,
 113                                              int bytes_transferred,
 114                                              void *user_data)
 115 {
 116         struct octeon_hcd *priv = cvmx_usb_to_octeon(usb);
 117         struct usb_hcd *hcd = octeon_to_hcd(priv);
 118         struct device *dev = hcd->self.controller;
 119         struct urb *urb = user_data;
 120
 121         urb->actual_length = bytes_transferred;
 122         urb->hcpriv = NULL;
 123
 124         if (!list_empty(&urb->urb_list)) {
 125                 /*
 126                  * It is on the dequeue_list, but we are going to call
 127                  * usb_hcd_giveback_urb(), so we must clear it from
 128                  * the list.  We got to it before the
 129                  * octeon_usb_urb_dequeue_work() tasklet did.
 130                  */
 131                 list_del(&urb->urb_list);
 132                 /* No longer on the dequeue_list. */
 133                 INIT_LIST_HEAD(&urb->urb_list);
 134         }
 135
 136         /* For Isochronous transactions we need to update the URB packet status
 137            list from data in our private copy */
 138         if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
 139                 int i;
 140                 /*
 141                  * The pointer to the private list is stored in the setup_packet
 142                  * field.
 143                  */
 144                 cvmx_usb_iso_packet_t *iso_packet = (cvmx_usb_iso_packet_t *) urb->setup_packet;
 145                 /* Recalculate the transfer size by adding up each packet */
 146                 urb->actual_length = 0;
 147                 for (i = 0; i < urb->number_of_packets; i++) {
 148                         if (iso_packet[i].status == CVMX_USB_COMPLETE_SUCCESS) {
 149                                 urb->iso_frame_desc[i].status = 0;
 150                                 urb->iso_frame_desc[i].actual_length = iso_packet[i].length;
 151                                 urb->actual_length += urb->iso_frame_desc[i].actual_length;
 152                         } else {
 153                                 dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%d submit=%d size=%d\n",
 154                                         i, urb->number_of_packets,
 155                                         iso_packet[i].status, pipe_handle,
 156                                         submit_handle, iso_packet[i].length);
 157                                 urb->iso_frame_desc[i].status = -EREMOTEIO;
 158                         }
 159                 }
 160                 /* Free the private list now that we don't need it anymore */
 161                 kfree(iso_packet);
 162                 urb->setup_packet = NULL;
 163         }
 164
 165         switch (status) {
 166         case CVMX_USB_COMPLETE_SUCCESS:
 167                 urb->status = 0;
 168                 break;
 169         case CVMX_USB_COMPLETE_CANCEL:
 170                 if (urb->status == 0)
 171                         urb->status = -ENOENT;
 172                 break;
 173         case CVMX_USB_COMPLETE_STALL:
 174                 dev_dbg(dev, "status=stall pipe=%d submit=%d size=%d\n",
 175                         pipe_handle, submit_handle, bytes_transferred);
 176                 urb->status = -EPIPE;
 177                 break;
 178         case CVMX_USB_COMPLETE_BABBLEERR:
 179                 dev_dbg(dev, "status=babble pipe=%d submit=%d size=%d\n",
 180                         pipe_handle, submit_handle, bytes_transferred);
 181                 urb->status = -EPIPE;
 182                 break;
 183         case CVMX_USB_COMPLETE_SHORT:
 184                 dev_dbg(dev, "status=short pipe=%d submit=%d size=%d\n",
 185                         pipe_handle, submit_handle, bytes_transferred);
 186                 urb->status = -EREMOTEIO;
 187                 break;
 188         case CVMX_USB_COMPLETE_ERROR:
 189         case CVMX_USB_COMPLETE_XACTERR:
 190         case CVMX_USB_COMPLETE_DATATGLERR:
 191         case CVMX_USB_COMPLETE_FRAMEERR:
 192                 dev_dbg(dev, "status=%d pipe=%d submit=%d size=%d\n",
 193                         status, pipe_handle, submit_handle, bytes_transferred);
 194                 urb->status = -EPROTO;
 195                 break;
 196         }
 197         spin_unlock(&priv->lock);
 198         usb_hcd_giveback_urb(octeon_to_hcd(priv), urb, urb->status);
 199         spin_lock(&priv->lock);
 200 }
 201
 202 static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
 203                                   struct urb *urb,
 204                                   gfp_t mem_flags)
 205 {
 206         struct octeon_hcd *priv = hcd_to_octeon(hcd);
 207         struct device *dev = hcd->self.controller;
 208         int submit_handle = -1;
 209         int pipe_handle;
 210         unsigned long flags;
 211         cvmx_usb_iso_packet_t *iso_packet;
 212         struct usb_host_endpoint *ep = urb->ep;
 213
 214         urb->status = 0;
 215         INIT_LIST_HEAD(&urb->urb_list); /* not enqueued on dequeue_list */
 216         spin_lock_irqsave(&priv->lock, flags);
 217
 218         if (!ep->hcpriv) {
 219                 cvmx_usb_transfer_t transfer_type;
 220                 cvmx_usb_speed_t speed;
 221                 int split_device = 0;
 222                 int split_port = 0;
 223                 switch (usb_pipetype(urb->pipe)) {
 224                 case PIPE_ISOCHRONOUS:
 225                         transfer_type = CVMX_USB_TRANSFER_ISOCHRONOUS;
 226                         break;
 227                 case PIPE_INTERRUPT:
 228                         transfer_type = CVMX_USB_TRANSFER_INTERRUPT;
 229                         break;
 230                 case PIPE_CONTROL:
 231                         transfer_type = CVMX_USB_TRANSFER_CONTROL;
 232                         break;
 233                 default:
 234                         transfer_type = CVMX_USB_TRANSFER_BULK;
 235                         break;
 236                 }
 237                 switch (urb->dev->speed) {
 238                 case USB_SPEED_LOW:
 239                         speed = CVMX_USB_SPEED_LOW;
 240                         break;
 241                 case USB_SPEED_FULL:
 242                         speed = CVMX_USB_SPEED_FULL;
 243                         break;
 244                 default:
 245                         speed = CVMX_USB_SPEED_HIGH;
 246                         break;
 247                 }
 248                 /*
 249                  * For slow devices on high speed ports we need to find the hub
 250                  * that does the speed translation so we know where to send the
 251                  * split transactions.
 252                  */
 253                 if (speed != CVMX_USB_SPEED_HIGH) {
 254                         /*
 255                          * Start at this device and work our way up the usb
 256                          * tree.
 257                          */
 258                         struct usb_device *dev = urb->dev;
 259                         while (dev->parent) {
 260                                 /*
 261                                  * If our parent is high speed then he'll
 262                                  * receive the splits.
 263                                  */
 264                                 if (dev->parent->speed == USB_SPEED_HIGH) {
 265                                         split_device = dev->parent->devnum;
 266                                         split_port = dev->portnum;
 267                                         break;
 268                                 }
 269                                 /*
 270                                  * Move up the tree one level. If we make it all
 271                                  * the way up the tree, then the port must not
 272                                  * be in high speed mode and we don't need a
 273                                  * split.
 274                                  */
 275                                 dev = dev->parent;
 276                         }
 277                 }
 278                 pipe_handle = cvmx_usb_open_pipe(&priv->usb,
 279                                                  0,
 280                                                  usb_pipedevice(urb->pipe),
 281                                                  usb_pipeendpoint(urb->pipe),
 282                                                  speed,
 283                                                  le16_to_cpu(ep->desc.wMaxPacketSize) & 0x7ff,
 284                                                  transfer_type,
 285                                                  usb_pipein(urb->pipe) ? CVMX_USB_DIRECTION_IN : CVMX_USB_DIRECTION_OUT,
 286                                                  urb->interval,
 287                                                  (le16_to_cpu(ep->desc.wMaxPacketSize) >> 11) & 0x3,
 288                                                  split_device,
 289                                                  split_port);
 290                 if (pipe_handle < 0) {
 291                         spin_unlock_irqrestore(&priv->lock, flags);
 292                         dev_dbg(dev, "Failed to create pipe\n");
 293                         return -ENOMEM;
 294                 }
 295                 ep->hcpriv = (void *)(0x10000L + pipe_handle);
 296         } else {
 297                 pipe_handle = 0xffff & (long)ep->hcpriv;
 298         }
 299
 300         switch (usb_pipetype(urb->pipe)) {
 301         case PIPE_ISOCHRONOUS:
 302                 dev_dbg(dev, "Submit isochronous to %d.%d\n",
 303                         usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
 304                 /*
 305                  * Allocate a structure to use for our private list of
 306                  * isochronous packets.
 307                  */
 308                 iso_packet = kmalloc(urb->number_of_packets * sizeof(cvmx_usb_iso_packet_t), GFP_ATOMIC);
 309                 if (iso_packet) {
 310                         int i;
 311                         /* Fill the list with the data from the URB */
 312                         for (i = 0; i < urb->number_of_packets; i++) {
 313                                 iso_packet[i].offset = urb->iso_frame_desc[i].offset;
 314                                 iso_packet[i].length = urb->iso_frame_desc[i].length;
 315                                 iso_packet[i].status = CVMX_USB_COMPLETE_ERROR;
 316                         }
 317                         /*
 318                          * Store a pointer to the list in the URB setup_packet
 319                          * field. We know this currently isn't being used and
 320                          * this saves us a bunch of logic.
 321                          */
 322                         urb->setup_packet = (char *)iso_packet;
 323                         submit_handle = cvmx_usb_submit_isochronous(&priv->usb, pipe_handle,
 324                                                         urb->start_frame,
 325                                                         0 /* flags */ ,
 326                                                         urb->number_of_packets,
 327                                                         iso_packet,
 328                                                         urb->transfer_dma,
 329                                                         urb->transfer_buffer_length,
 330                                                         octeon_usb_urb_complete_callback,
 331                                                         urb);
 332                         /*
 333                          * If submit failed we need to free our private packet
 334                          * list.
 335                          */
 336                         if (submit_handle < 0) {
 337                                 urb->setup_packet = NULL;
 338                                 kfree(iso_packet);
 339                         }
 340                 }
 341                 break;
 342         case PIPE_INTERRUPT:
 343                 dev_dbg(dev, "Submit interrupt to %d.%d\n",
 344                         usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
 345                 submit_handle = cvmx_usb_submit_interrupt(&priv->usb, pipe_handle,
 346                                               urb->transfer_dma,
 347                                               urb->transfer_buffer_length,
 348                                               octeon_usb_urb_complete_callback,
 349                                               urb);
 350                 break;
 351         case PIPE_CONTROL:
 352                 dev_dbg(dev, "Submit control to %d.%d\n",
 353                         usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
 354                 submit_handle = cvmx_usb_submit_control(&priv->usb, pipe_handle,
 355                                             urb->setup_dma,
 356                                             urb->transfer_dma,
 357                                             urb->transfer_buffer_length,
 358                                             octeon_usb_urb_complete_callback,
 359                                             urb);
 360                 break;
 361         case PIPE_BULK:
 362                 dev_dbg(dev, "Submit bulk to %d.%d\n",
 363                         usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
 364                 submit_handle = cvmx_usb_submit_bulk(&priv->usb, pipe_handle,
 365                                          urb->transfer_dma,
 366                                          urb->transfer_buffer_length,
 367                                          octeon_usb_urb_complete_callback,
 368                                          urb);
 369                 break;
 370         }
 371         if (submit_handle < 0) {
 372                 spin_unlock_irqrestore(&priv->lock, flags);
 373                 dev_dbg(dev, "Failed to submit\n");
 374                 return -ENOMEM;
 375         }
 376         urb->hcpriv = (void *)(long)(((submit_handle & 0xffff) << 16) | pipe_handle);
 377         spin_unlock_irqrestore(&priv->lock, flags);
 378         return 0;
 379 }
 380
 381 static void octeon_usb_urb_dequeue_work(unsigned long arg)
 382 {
 383         unsigned long flags;
 384         struct octeon_hcd *priv = (struct octeon_hcd *)arg;
 385
 386         spin_lock_irqsave(&priv->lock, flags);
 387
 388         while (!list_empty(&priv->dequeue_list)) {
 389                 int pipe_handle;
 390                 int submit_handle;
 391                 struct urb *urb = container_of(priv->dequeue_list.next, struct urb, urb_list);
 392                 list_del(&urb->urb_list);
 393                 /* not enqueued on dequeue_list */
 394                 INIT_LIST_HEAD(&urb->urb_list);
 395                 pipe_handle = 0xffff & (long)urb->hcpriv;
 396                 submit_handle = ((long)urb->hcpriv) >> 16;
 397                 cvmx_usb_cancel(&priv->usb, pipe_handle, submit_handle);
 398         }
 399
 400         spin_unlock_irqrestore(&priv->lock, flags);
 401 }
 402
 403 static int octeon_usb_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 404 {
 405         struct octeon_hcd *priv = hcd_to_octeon(hcd);
 406         unsigned long flags;
 407
 408         if (!urb->dev)
 409                 return -EINVAL;
 410
 411         spin_lock_irqsave(&priv->lock, flags);
 412
 413         urb->status = status;
 414         list_add_tail(&urb->urb_list, &priv->dequeue_list);
 415
 416         spin_unlock_irqrestore(&priv->lock, flags);
 417
 418         tasklet_schedule(&priv->dequeue_tasklet);
 419
 420         return 0;
 421 }
 422
 423 static void octeon_usb_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
 424 {
 425         struct device *dev = hcd->self.controller;
 426
 427         if (ep->hcpriv) {
 428                 struct octeon_hcd *priv = hcd_to_octeon(hcd);
 429                 int pipe_handle = 0xffff & (long)ep->hcpriv;
 430                 unsigned long flags;
 431                 spin_lock_irqsave(&priv->lock, flags);
 432                 cvmx_usb_cancel_all(&priv->usb, pipe_handle);
 433                 if (cvmx_usb_close_pipe(&priv->usb, pipe_handle))
 434                         dev_dbg(dev, "Closing pipe %d failed\n", pipe_handle);
 435                 spin_unlock_irqrestore(&priv->lock, flags);
 436                 ep->hcpriv = NULL;
 437         }
 438 }
 439
 440 static int octeon_usb_hub_status_data(struct usb_hcd *hcd, char *buf)
 441 {
 442         struct octeon_hcd *priv = hcd_to_octeon(hcd);
 443         cvmx_usb_port_status_t port_status;
 444         unsigned long flags;
 445
 446         spin_lock_irqsave(&priv->lock, flags);
 447         port_status = cvmx_usb_get_status(&priv->usb);
 448         spin_unlock_irqrestore(&priv->lock, flags);
 449         buf[0] = 0;
 450         buf[0] = port_status.connect_change << 1;
 451
 452         return (buf[0] != 0);
 453 }
 454
 455 static int octeon_usb_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength)
 456 {
 457         struct octeon_hcd *priv = hcd_to_octeon(hcd);
 458         struct device *dev = hcd->self.controller;
 459         cvmx_usb_port_status_t usb_port_status;
 460         int port_status;
 461         struct usb_hub_descriptor *desc;
 462         unsigned long flags;
 463
 464         switch (typeReq) {
 465         case ClearHubFeature:
 466                 dev_dbg(dev, "ClearHubFeature\n");
 467                 switch (wValue) {
 468                 case C_HUB_LOCAL_POWER:
 469                 case C_HUB_OVER_CURRENT:
 470                         /* Nothing required here */
 471                         break;
 472                 default:
 473                         return -EINVAL;
 474                 }
 475                 break;
 476         case ClearPortFeature:
 477                 dev_dbg(dev, "ClearPortFeature\n");
 478                 if (wIndex != 1) {
 479                         dev_dbg(dev, " INVALID\n");
 480                         return -EINVAL;
 481                 }
 482
 483                 switch (wValue) {
 484                 case USB_PORT_FEAT_ENABLE:
 485                         dev_dbg(dev, " ENABLE\n");
 486                         spin_lock_irqsave(&priv->lock, flags);
 487                         cvmx_usb_disable(&priv->usb);
 488                         spin_unlock_irqrestore(&priv->lock, flags);
 489                         break;
 490                 case USB_PORT_FEAT_SUSPEND:
 491                         dev_dbg(dev, " SUSPEND\n");
 492                         /* Not supported on Octeon */
 493                         break;
 494                 case USB_PORT_FEAT_POWER:
 495                         dev_dbg(dev, " POWER\n");
 496                         /* Not supported on Octeon */
 497                         break;
 498                 case USB_PORT_FEAT_INDICATOR:
 499                         dev_dbg(dev, " INDICATOR\n");
 500                         /* Port inidicator not supported */
 501                         break;
 502                 case USB_PORT_FEAT_C_CONNECTION:
 503                         dev_dbg(dev, " C_CONNECTION\n");
 504                         /* Clears drivers internal connect status change flag */
 505                         spin_lock_irqsave(&priv->lock, flags);
 506                         cvmx_usb_set_status(&priv->usb, cvmx_usb_get_status(&priv->usb));
 507                         spin_unlock_irqrestore(&priv->lock, flags);
 508                         break;
 509                 case USB_PORT_FEAT_C_RESET:
 510                         dev_dbg(dev, " C_RESET\n");
 511                         /*
 512                          * Clears the driver's internal Port Reset Change flag.
 513                          */
 514                         spin_lock_irqsave(&priv->lock, flags);
 515                         cvmx_usb_set_status(&priv->usb, cvmx_usb_get_status(&priv->usb));
 516                         spin_unlock_irqrestore(&priv->lock, flags);
 517                         break;
 518                 case USB_PORT_FEAT_C_ENABLE:
 519                         dev_dbg(dev, " C_ENABLE\n");
 520                         /*
 521                          * Clears the driver's internal Port Enable/Disable
 522                          * Change flag.
 523                          */
 524                         spin_lock_irqsave(&priv->lock, flags);
 525                         cvmx_usb_set_status(&priv->usb, cvmx_usb_get_status(&priv->usb));
 526                         spin_unlock_irqrestore(&priv->lock, flags);
 527                         break;
 528                 case USB_PORT_FEAT_C_SUSPEND:
 529                         dev_dbg(dev, " C_SUSPEND\n");
 530                         /*
 531                          * Clears the driver's internal Port Suspend Change
 532                          * flag, which is set when resume signaling on the host
 533                          * port is complete.
 534                          */
 535                         break;
 536                 case USB_PORT_FEAT_C_OVER_CURRENT:
 537                         dev_dbg(dev, " C_OVER_CURRENT\n");
 538                         /* Clears the driver's overcurrent Change flag */
 539                         spin_lock_irqsave(&priv->lock, flags);
 540                         cvmx_usb_set_status(&priv->usb, cvmx_usb_get_status(&priv->usb));
 541                         spin_unlock_irqrestore(&priv->lock, flags);
 542                         break;
 543                 default:
 544                         dev_dbg(dev, " UNKNOWN\n");
 545                         return -EINVAL;
 546                 }
 547                 break;
 548         case GetHubDescriptor:
 549                 dev_dbg(dev, "GetHubDescriptor\n");
 550                 desc = (struct usb_hub_descriptor *)buf;
 551                 desc->bDescLength = 9;
 552                 desc->bDescriptorType = 0x29;
 553                 desc->bNbrPorts = 1;
 554                 desc->wHubCharacteristics = 0x08;
 555                 desc->bPwrOn2PwrGood = 1;
 556                 desc->bHubContrCurrent = 0;
 557                 desc->u.hs.DeviceRemovable[0] = 0;
 558                 desc->u.hs.DeviceRemovable[1] = 0xff;
 559                 break;
 560         case GetHubStatus:
 561                 dev_dbg(dev, "GetHubStatus\n");
 562                 *(__le32 *) buf = 0;
 563                 break;
 564         case GetPortStatus:
 565                 dev_dbg(dev, "GetPortStatus\n");
 566                 if (wIndex != 1) {
 567                         dev_dbg(dev, " INVALID\n");
 568                         return -EINVAL;
 569                 }
 570
 571                 spin_lock_irqsave(&priv->lock, flags);
 572                 usb_port_status = cvmx_usb_get_status(&priv->usb);
 573                 spin_unlock_irqrestore(&priv->lock, flags);
 574                 port_status = 0;
 575
 576                 if (usb_port_status.connect_change) {
 577                         port_status |= (1 << USB_PORT_FEAT_C_CONNECTION);
 578                         dev_dbg(dev, " C_CONNECTION\n");
 579                 }
 580
 581                 if (usb_port_status.port_enabled) {
 582                         port_status |= (1 << USB_PORT_FEAT_C_ENABLE);
 583                         dev_dbg(dev, " C_ENABLE\n");
 584                 }
 585
 586                 if (usb_port_status.connected) {
 587                         port_status |= (1 << USB_PORT_FEAT_CONNECTION);
 588                         dev_dbg(dev, " CONNECTION\n");
 589                 }
 590
 591                 if (usb_port_status.port_enabled) {
 592                         port_status |= (1 << USB_PORT_FEAT_ENABLE);
 593                         dev_dbg(dev, " ENABLE\n");
 594                 }
 595
 596                 if (usb_port_status.port_over_current) {
 597                         port_status |= (1 << USB_PORT_FEAT_OVER_CURRENT);
 598                         dev_dbg(dev, " OVER_CURRENT\n");
 599                 }
 600
 601                 if (usb_port_status.port_powered) {
 602                         port_status |= (1 << USB_PORT_FEAT_POWER);
 603                         dev_dbg(dev, " POWER\n");
 604                 }
 605
 606                 if (usb_port_status.port_speed == CVMX_USB_SPEED_HIGH) {
 607                         port_status |= USB_PORT_STAT_HIGH_SPEED;
 608                         dev_dbg(dev, " HIGHSPEED\n");
 609                 } else if (usb_port_status.port_speed == CVMX_USB_SPEED_LOW) {
 610                         port_status |= (1 << USB_PORT_FEAT_LOWSPEED);
 611                         dev_dbg(dev, " LOWSPEED\n");
 612                 }
 613
 614                 *((__le32 *) buf) = cpu_to_le32(port_status);
 615                 break;
 616         case SetHubFeature:
 617                 dev_dbg(dev, "SetHubFeature\n");
 618                 /* No HUB features supported */
 619                 break;
 620         case SetPortFeature:
 621                 dev_dbg(dev, "SetPortFeature\n");
 622                 if (wIndex != 1) {
 623                         dev_dbg(dev, " INVALID\n");
 624                         return -EINVAL;
 625                 }
 626
 627                 switch (wValue) {
 628                 case USB_PORT_FEAT_SUSPEND:
 629                         dev_dbg(dev, " SUSPEND\n");
 630                         return -EINVAL;
 631                 case USB_PORT_FEAT_POWER:
 632                         dev_dbg(dev, " POWER\n");
 633                         return -EINVAL;
 634                 case USB_PORT_FEAT_RESET:
 635                         dev_dbg(dev, " RESET\n");
 636                         spin_lock_irqsave(&priv->lock, flags);
 637                         cvmx_usb_disable(&priv->usb);
 638                         if (cvmx_usb_enable(&priv->usb))
 639                                 dev_dbg(dev, "Failed to enable the port\n");
 640                         spin_unlock_irqrestore(&priv->lock, flags);
 641                         return 0;
 642                 case USB_PORT_FEAT_INDICATOR:
 643                         dev_dbg(dev, " INDICATOR\n");
 644                         /* Not supported */
 645                         break;
 646                 default:
 647                         dev_dbg(dev, " UNKNOWN\n");
 648                         return -EINVAL;
 649                 }
 650                 break;
 651         default:
 652                 dev_dbg(dev, "Unknown root hub request\n");
 653                 return -EINVAL;
 654         }
 655         return 0;
 656 }
 657
 658
 659 static const struct hc_driver octeon_hc_driver = {
 660         .description            = "Octeon USB",
 661         .product_desc           = "Octeon Host Controller",
 662         .hcd_priv_size          = sizeof(struct octeon_hcd),
 663         .irq                    = octeon_usb_irq,
 664         .flags                  = HCD_MEMORY | HCD_USB2,
 665         .start                  = octeon_usb_start,
 666         .stop                   = octeon_usb_stop,
 667         .urb_enqueue            = octeon_usb_urb_enqueue,
 668         .urb_dequeue            = octeon_usb_urb_dequeue,
 669         .endpoint_disable       = octeon_usb_endpoint_disable,
 670         .get_frame_number       = octeon_usb_get_frame_number,
 671         .hub_status_data        = octeon_usb_hub_status_data,
 672         .hub_control            = octeon_usb_hub_control,
 673 };
 674
 675
 676 static int octeon_usb_driver_probe(struct device *dev)
 677 {
 678         int status;
 679         int usb_num = to_platform_device(dev)->id;
 680         int irq = platform_get_irq(to_platform_device(dev), 0);
 681         struct octeon_hcd *priv;
 682         struct usb_hcd *hcd;
 683         unsigned long flags;
 684
 685         /*
 686          * Set the DMA mask to 64bits so we get buffers already translated for
 687          * DMA.
 688          */
 689         dev->coherent_dma_mask = ~0;
 690         dev->dma_mask = &dev->coherent_dma_mask;
 691
 692         hcd = usb_create_hcd(&octeon_hc_driver, dev, dev_name(dev));
 693         if (!hcd) {
 694                 dev_dbg(dev, "Failed to allocate memory for HCD\n");
 695                 return -1;
 696         }
 697         hcd->uses_new_polling = 1;
 698         priv = (struct octeon_hcd *)hcd->hcd_priv;
 699
 700         spin_lock_init(&priv->lock);
 701
 702         tasklet_init(&priv->dequeue_tasklet, octeon_usb_urb_dequeue_work, (unsigned long)priv);
 703         INIT_LIST_HEAD(&priv->dequeue_list);
 704
 705         status = cvmx_usb_initialize(&priv->usb, usb_num, CVMX_USB_INITIALIZE_FLAGS_CLOCK_AUTO);
 706         if (status) {
 707                 dev_dbg(dev, "USB initialization failed with %d\n", status);
 708                 kfree(hcd);
 709                 return -1;
 710         }
 711
 712         /* This delay is needed for CN3010, but I don't know why... */
 713         mdelay(10);
 714
 715         spin_lock_irqsave(&priv->lock, flags);
 716         cvmx_usb_poll(&priv->usb);
 717         spin_unlock_irqrestore(&priv->lock, flags);
 718
 719         status = usb_add_hcd(hcd, irq, IRQF_SHARED);
 720         if (status) {
 721                 dev_dbg(dev, "USB add HCD failed with %d\n", status);
 722                 kfree(hcd);
 723                 return -1;
 724         }
 725
 726         printk("OcteonUSB: Registered HCD for port %d on irq %d\n", usb_num, irq);
 727
 728         return 0;
 729 }
 730
 731 static int octeon_usb_driver_remove(struct device *dev)
 732 {
 733         int status;
 734         struct usb_hcd *hcd = dev_get_drvdata(dev);
 735         struct octeon_hcd *priv = hcd_to_octeon(hcd);
 736         unsigned long flags;
 737
 738         usb_remove_hcd(hcd);
 739         tasklet_kill(&priv->dequeue_tasklet);
 740         spin_lock_irqsave(&priv->lock, flags);
 741         status = cvmx_usb_shutdown(&priv->usb);
 742         spin_unlock_irqrestore(&priv->lock, flags);
 743         if (status)
 744                 dev_dbg(dev, "USB shutdown failed with %d\n", status);
 745
 746         kfree(hcd);
 747
 748         return 0;
 749 }
 750
 751 static struct device_driver octeon_usb_driver = {
 752         .name   = "OcteonUSB",
 753         .bus    = &platform_bus_type,
 754         .probe  = octeon_usb_driver_probe,
 755         .remove = octeon_usb_driver_remove,
 756 };
 757
 758
 759 #define MAX_USB_PORTS   10
 760 static struct platform_device *pdev_glob[MAX_USB_PORTS];
 761 static int octeon_usb_registered;
 762 static int __init octeon_usb_module_init(void)
 763 {
 764         int num_devices = cvmx_usb_get_num_ports();
 765         int device;
 766
 767         if (usb_disabled() || num_devices == 0)
 768                 return -ENODEV;
 769
 770         if (driver_register(&octeon_usb_driver))
 771                 return -ENOMEM;
 772
 773         octeon_usb_registered = 1;
 774         printk("OcteonUSB: Detected %d ports\n", num_devices);
 775
 776         /*
 777          * Only cn52XX and cn56XX have DWC_OTG USB hardware and the
 778          * IOB priority registers.  Under heavy network load USB
 779          * hardware can be starved by the IOB causing a crash.  Give
 780          * it a priority boost if it has been waiting more than 400
 781          * cycles to avoid this situation.
 782          *
 783          * Testing indicates that a cnt_val of 8192 is not sufficient,
 784          * but no failures are seen with 4096.  We choose a value of
 785          * 400 to give a safety factor of 10.
 786          */
 787         if (OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN56XX)) {
 788                 union cvmx_iob_n2c_l2c_pri_cnt pri_cnt;
 789
 790                 pri_cnt.u64 = 0;
 791                 pri_cnt.s.cnt_enb = 1;
 792                 pri_cnt.s.cnt_val = 400;
 793                 cvmx_write_csr(CVMX_IOB_N2C_L2C_PRI_CNT, pri_cnt.u64);
 794         }
 795
 796         for (device = 0; device < num_devices; device++) {
 797                 struct resource irq_resource;
 798                 struct platform_device *pdev;
 799                 memset(&irq_resource, 0, sizeof(irq_resource));
 800                 irq_resource.start = (device == 0) ? OCTEON_IRQ_USB0 : OCTEON_IRQ_USB1;
 801                 irq_resource.end = irq_resource.start;
 802                 irq_resource.flags = IORESOURCE_IRQ;
 803                 pdev = platform_device_register_simple((char *)octeon_usb_driver.  name, device, &irq_resource, 1);
 804                 if (IS_ERR(pdev)) {
 805                         driver_unregister(&octeon_usb_driver);
 806                         octeon_usb_registered = 0;
 807                         return PTR_ERR(pdev);
 808                 }
 809                 if (device < MAX_USB_PORTS)
 810                         pdev_glob[device] = pdev;
 811
 812         }
 813         return 0;
 814 }
 815
 816 static void __exit octeon_usb_module_cleanup(void)
 817 {
 818         int i;
 819
 820         for (i = 0; i < MAX_USB_PORTS; i++)
 821                 if (pdev_glob[i]) {
 822                         platform_device_unregister(pdev_glob[i]);
 823                         pdev_glob[i] = NULL;
 824                 }
 825         if (octeon_usb_registered)
 826                 driver_unregister(&octeon_usb_driver);
 827 }
 828
 829 MODULE_LICENSE("GPL");
 830 MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>");
 831 MODULE_DESCRIPTION("Cavium Networks Octeon USB Host driver.");
 832 module_init(octeon_usb_module_init);
 833 module_exit(octeon_usb_module_cleanup);