drivers/usb/musb/musb_procfs.c

   1 /*
   2  * MUSB OTG driver debug support
   3  *
   4  * Copyright 2005 Mentor Graphics Corporation
   5  * Copyright (C) 2005-2006 by Texas Instruments
   6  * Copyright (C) 2006-2007 Nokia Corporation
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
  23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  25  * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  28  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  29  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  */
  34
  35 #include <linux/kernel.h>
  36 #include <linux/proc_fs.h>
  37 #include <linux/seq_file.h>
  38 #include <linux/uaccess.h>      /* FIXME remove procfs writes */
  39 #include <mach/hardware.h>
  40
  41 #include "musb_core.h"
  42
  43 #include "davinci.h"
  44
  45 #ifdef CONFIG_USB_MUSB_HDRC_HCD
  46
  47 static int dump_qh(struct musb_qh *qh, char *buf, unsigned max)
  48 {
  49         int                             count;
  50         int                             tmp;
  51         struct usb_host_endpoint        *hep = qh->hep;
  52         struct urb                      *urb;
  53
  54         count = snprintf(buf, max, "    qh %p dev%d ep%d%s max%d\n",
  55                         qh, qh->dev->devnum, qh->epnum,
  56                         ({ char *s; switch (qh->type) {
  57                         case USB_ENDPOINT_XFER_BULK:
  58                                 s = "-bulk"; break;
  59                         case USB_ENDPOINT_XFER_INT:
  60                                 s = "-int"; break;
  61                         case USB_ENDPOINT_XFER_CONTROL:
  62                                 s = ""; break;
  63                         default:
  64                                 s = "iso"; break;
  65                         }; s; }),
  66                         qh->maxpacket);
  67         if (count <= 0)
  68                 return 0;
  69         buf += count;
  70         max -= count;
  71
  72         list_for_each_entry(urb, &hep->urb_list, urb_list) {
  73                 tmp = snprintf(buf, max, "\t%s urb %p %d/%d\n",
  74                                 usb_pipein(urb->pipe) ? "in" : "out",
  75                                 urb, urb->actual_length,
  76                                 urb->transfer_buffer_length);
  77                 if (tmp <= 0)
  78                         break;
  79                 tmp = min(tmp, (int)max);
  80                 count += tmp;
  81                 buf += tmp;
  82                 max -= tmp;
  83         }
  84         return count;
  85 }
  86
  87 static int
  88 dump_queue(struct list_head *q, char *buf, unsigned max)
  89 {
  90         int             count = 0;
  91         struct musb_qh  *qh;
  92
  93         list_for_each_entry(qh, q, ring) {
  94                 int     tmp;
  95
  96                 tmp = dump_qh(qh, buf, max);
  97                 if (tmp <= 0)
  98                         break;
  99                 tmp = min(tmp, (int)max);
 100                 count += tmp;
 101                 buf += tmp;
 102                 max -= tmp;
 103         }
 104         return count;
 105 }
 106
 107 #endif  /* HCD */
 108
 109 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
 110 static int dump_ep(struct musb_ep *ep, char *buffer, unsigned max)
 111 {
 112         char            *buf = buffer;
 113         int             code = 0;
 114         void __iomem    *regs = ep->hw_ep->regs;
 115         char            *mode = "1buf";
 116
 117         if (ep->is_in) {
 118                 if (ep->hw_ep->tx_double_buffered)
 119                         mode = "2buf";
 120         } else {
 121                 if (ep->hw_ep->rx_double_buffered)
 122                         mode = "2buf";
 123         }
 124
 125         do {
 126                 struct usb_request      *req;
 127
 128                 code = snprintf(buf, max,
 129                                 "\n%s (hw%d): %s%s, csr %04x maxp %04x\n",
 130                                 ep->name, ep->current_epnum,
 131                                 mode, ep->dma ? " dma" : "",
 132                                 musb_readw(regs,
 133                                         (ep->is_in || !ep->current_epnum)
 134                                                 ? MUSB_TXCSR
 135                                                 : MUSB_RXCSR),
 136                                 musb_readw(regs, ep->is_in
 137                                                 ? MUSB_TXMAXP
 138                                                 : MUSB_RXMAXP)
 139                                 );
 140                 if (code <= 0)
 141                         break;
 142                 code = min(code, (int) max);
 143                 buf += code;
 144                 max -= code;
 145
 146                 if (is_cppi_enabled() && ep->current_epnum) {
 147                         unsigned        cppi = ep->current_epnum - 1;
 148                         void __iomem    *base = ep->musb->ctrl_base;
 149                         unsigned        off1 = cppi << 2;
 150                         void __iomem    *ram = base;
 151                         char            tmp[16];
 152
 153                         if (ep->is_in) {
 154                                 ram += DAVINCI_TXCPPI_STATERAM_OFFSET(cppi);
 155                                 tmp[0] = 0;
 156                         } else {
 157                                 ram += DAVINCI_RXCPPI_STATERAM_OFFSET(cppi);
 158                                 snprintf(tmp, sizeof tmp, "%d left, ",
 159                                         musb_readl(base,
 160                                         DAVINCI_RXCPPI_BUFCNT0_REG + off1));
 161                         }
 162
 163                         code = snprintf(buf, max, "%cX DMA%d: %s"
 164                                         "%08x %08x, %08x %08x; "
 165                                         "%08x %08x %08x .. %08x\n",
 166                                 ep->is_in ? 'T' : 'R',
 167                                 ep->current_epnum - 1, tmp,
 168                                 musb_readl(ram, 0 * 4),
 169                                 musb_readl(ram, 1 * 4),
 170                                 musb_readl(ram, 2 * 4),
 171                                 musb_readl(ram, 3 * 4),
 172                                 musb_readl(ram, 4 * 4),
 173                                 musb_readl(ram, 5 * 4),
 174                                 musb_readl(ram, 6 * 4),
 175                                 musb_readl(ram, 7 * 4));
 176                         if (code <= 0)
 177                                 break;
 178                         code = min(code, (int) max);
 179                         buf += code;
 180                         max -= code;
 181                 }
 182
 183                 if (list_empty(&ep->req_list)) {
 184                         code = snprintf(buf, max, "\t(queue empty)\n");
 185                         if (code <= 0)
 186                                 break;
 187                         code = min(code, (int) max);
 188                         buf += code;
 189                         max -= code;
 190                         break;
 191                 }
 192                 list_for_each_entry(req, &ep->req_list, list) {
 193                         code = snprintf(buf, max, "\treq %p, %s%s%d/%d\n",
 194                                         req,
 195                                         req->zero ? "zero, " : "",
 196                                         req->short_not_ok ? "!short, " : "",
 197                                         req->actual, req->length);
 198                         if (code <= 0)
 199                                 break;
 200                         code = min(code, (int) max);
 201                         buf += code;
 202                         max -= code;
 203                 }
 204         } while (0);
 205         return buf - buffer;
 206 }
 207 #endif
 208
 209 static int
 210 dump_end_info(struct musb *musb, u8 epnum, char *aBuffer, unsigned max)
 211 {
 212         int                     code = 0;
 213         char                    *buf = aBuffer;
 214         struct musb_hw_ep       *hw_ep = &musb->endpoints[epnum];
 215
 216         do {
 217                 musb_ep_select(musb->mregs, epnum);
 218 #ifdef CONFIG_USB_MUSB_HDRC_HCD
 219                 if (is_host_active(musb)) {
 220                         int             dump_rx, dump_tx;
 221                         void __iomem    *regs = hw_ep->regs;
 222
 223                         /* TEMPORARY (!) until we have a real periodic
 224                          * schedule tree ...
 225                          */
 226                         if (!epnum) {
 227                                 /* control is shared, uses RX queue
 228                                  * but (mostly) shadowed tx registers
 229                                  */
 230                                 dump_tx = !list_empty(&musb->control);
 231                                 dump_rx = 0;
 232                         } else if (hw_ep == musb->bulk_ep) {
 233                                 dump_tx = !list_empty(&musb->out_bulk);
 234                                 dump_rx = !list_empty(&musb->in_bulk);
 235                         } else if (musb->periodic[epnum]) {
 236                                 struct usb_host_endpoint        *hep;
 237
 238                                 hep = musb->periodic[epnum]->hep;
 239                                 dump_rx = hep->desc.bEndpointAddress
 240                                                 & USB_ENDPOINT_DIR_MASK;
 241                                 dump_tx = !dump_rx;
 242                         } else
 243                                 break;
 244                         /* END TEMPORARY */
 245
 246
 247                         if (dump_rx) {
 248                                 code = snprintf(buf, max,
 249                                         "\nRX%d: %s rxcsr %04x interval %02x "
 250                                         "max %04x type %02x; "
 251                                         "dev %d hub %d port %d"
 252                                         "\n",
 253                                         epnum,
 254                                         hw_ep->rx_double_buffered
 255                                                 ? "2buf" : "1buf",
 256                                         musb_readw(regs, MUSB_RXCSR),
 257                                         musb_readb(regs, MUSB_RXINTERVAL),
 258                                         musb_readw(regs, MUSB_RXMAXP),
 259                                         musb_readb(regs, MUSB_RXTYPE),
 260                                         /* FIXME:  assumes multipoint */
 261                                         musb_readb(musb->mregs,
 262                                                 MUSB_BUSCTL_OFFSET(epnum,
 263                                                 MUSB_RXFUNCADDR)),
 264                                         musb_readb(musb->mregs,
 265                                                 MUSB_BUSCTL_OFFSET(epnum,
 266                                                 MUSB_RXHUBADDR)),
 267                                         musb_readb(musb->mregs,
 268                                                 MUSB_BUSCTL_OFFSET(epnum,
 269                                                 MUSB_RXHUBPORT))
 270                                         );
 271                                 if (code <= 0)
 272                                         break;
 273                                 code = min(code, (int) max);
 274                                 buf += code;
 275                                 max -= code;
 276
 277                                 if (is_cppi_enabled()
 278                                                 && epnum
 279                                                 && hw_ep->rx_channel) {
 280                                         unsigned        cppi = epnum - 1;
 281                                         unsigned        off1 = cppi << 2;
 282                                         void __iomem    *base;
 283                                         void __iomem    *ram;
 284                                         char            tmp[16];
 285
 286                                         base = musb->ctrl_base;
 287                                         ram = DAVINCI_RXCPPI_STATERAM_OFFSET(
 288                                                         cppi) + base;
 289                                         snprintf(tmp, sizeof tmp, "%d left, ",
 290                                                 musb_readl(base,
 291                                                 DAVINCI_RXCPPI_BUFCNT0_REG
 292                                                                 + off1));
 293
 294                                         code = snprintf(buf, max,
 295                                                 "    rx dma%d: %s"
 296                                                 "%08x %08x, %08x %08x; "
 297                                                 "%08x %08x %08x .. %08x\n",
 298                                                 cppi, tmp,
 299                                                 musb_readl(ram, 0 * 4),
 300                                                 musb_readl(ram, 1 * 4),
 301                                                 musb_readl(ram, 2 * 4),
 302                                                 musb_readl(ram, 3 * 4),
 303                                                 musb_readl(ram, 4 * 4),
 304                                                 musb_readl(ram, 5 * 4),
 305                                                 musb_readl(ram, 6 * 4),
 306                                                 musb_readl(ram, 7 * 4));
 307                                         if (code <= 0)
 308                                                 break;
 309                                         code = min(code, (int) max);
 310                                         buf += code;
 311                                         max -= code;
 312                                 }
 313
 314                                 if (hw_ep == musb->bulk_ep
 315                                                 && !list_empty(
 316                                                         &musb->in_bulk)) {
 317                                         code = dump_queue(&musb->in_bulk,
 318                                                         buf, max);
 319                                         if (code <= 0)
 320                                                 break;
 321                                         code = min(code, (int) max);
 322                                         buf += code;
 323                                         max -= code;
 324                                 } else if (musb->periodic[epnum]) {
 325                                         code = dump_qh(musb->periodic[epnum],
 326                                                         buf, max);
 327                                         if (code <= 0)
 328                                                 break;
 329                                         code = min(code, (int) max);
 330                                         buf += code;
 331                                         max -= code;
 332                                 }
 333                         }
 334
 335                         if (dump_tx) {
 336                                 code = snprintf(buf, max,
 337                                         "\nTX%d: %s txcsr %04x interval %02x "
 338                                         "max %04x type %02x; "
 339                                         "dev %d hub %d port %d"
 340                                         "\n",
 341                                         epnum,
 342                                         hw_ep->tx_double_buffered
 343                                                 ? "2buf" : "1buf",
 344                                         musb_readw(regs, MUSB_TXCSR),
 345                                         musb_readb(regs, MUSB_TXINTERVAL),
 346                                         musb_readw(regs, MUSB_TXMAXP),
 347                                         musb_readb(regs, MUSB_TXTYPE),
 348                                         /* FIXME:  assumes multipoint */
 349                                         musb_readb(musb->mregs,
 350                                                 MUSB_BUSCTL_OFFSET(epnum,
 351                                                 MUSB_TXFUNCADDR)),
 352                                         musb_readb(musb->mregs,
 353                                                 MUSB_BUSCTL_OFFSET(epnum,
 354                                                 MUSB_TXHUBADDR)),
 355                                         musb_readb(musb->mregs,
 356                                                 MUSB_BUSCTL_OFFSET(epnum,
 357                                                 MUSB_TXHUBPORT))
 358                                         );
 359                                 if (code <= 0)
 360                                         break;
 361                                 code = min(code, (int) max);
 362                                 buf += code;
 363                                 max -= code;
 364
 365                                 if (is_cppi_enabled()
 366                                                 && epnum
 367                                                 && hw_ep->tx_channel) {
 368                                         unsigned        cppi = epnum - 1;
 369                                         void __iomem    *base;
 370                                         void __iomem    *ram;
 371
 372                                         base = musb->ctrl_base;
 373                                         ram = DAVINCI_RXCPPI_STATERAM_OFFSET(
 374                                                         cppi) + base;
 375                                         code = snprintf(buf, max,
 376                                                 "    tx dma%d: "
 377                                                 "%08x %08x, %08x %08x; "
 378                                                 "%08x %08x %08x .. %08x\n",
 379                                                 cppi,
 380                                                 musb_readl(ram, 0 * 4),
 381                                                 musb_readl(ram, 1 * 4),
 382                                                 musb_readl(ram, 2 * 4),
 383                                                 musb_readl(ram, 3 * 4),
 384                                                 musb_readl(ram, 4 * 4),
 385                                                 musb_readl(ram, 5 * 4),
 386                                                 musb_readl(ram, 6 * 4),
 387                                                 musb_readl(ram, 7 * 4));
 388                                         if (code <= 0)
 389                                                 break;
 390                                         code = min(code, (int) max);
 391                                         buf += code;
 392                                         max -= code;
 393                                 }
 394
 395                                 if (hw_ep == musb->control_ep
 396                                                 && !list_empty(
 397                                                         &musb->control)) {
 398                                         code = dump_queue(&musb->control,
 399                                                         buf, max);
 400                                         if (code <= 0)
 401                                                 break;
 402                                         code = min(code, (int) max);
 403                                         buf += code;
 404                                         max -= code;
 405                                 } else if (hw_ep == musb->bulk_ep
 406                                                 && !list_empty(
 407                                                         &musb->out_bulk)) {
 408                                         code = dump_queue(&musb->out_bulk,
 409                                                         buf, max);
 410                                         if (code <= 0)
 411                                                 break;
 412                                         code = min(code, (int) max);
 413                                         buf += code;
 414                                         max -= code;
 415                                 } else if (musb->periodic[epnum]) {
 416                                         code = dump_qh(musb->periodic[epnum],
 417                                                         buf, max);
 418                                         if (code <= 0)
 419                                                 break;
 420                                         code = min(code, (int) max);
 421                                         buf += code;
 422                                         max -= code;
 423                                 }
 424                         }
 425                 }
 426 #endif
 427 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
 428                 if (is_peripheral_active(musb)) {
 429                         code = 0;
 430
 431                         if (hw_ep->ep_in.desc || !epnum) {
 432                                 code = dump_ep(&hw_ep->ep_in, buf, max);
 433                                 if (code <= 0)
 434                                         break;
 435                                 code = min(code, (int) max);
 436                                 buf += code;
 437                                 max -= code;
 438                         }
 439                         if (hw_ep->ep_out.desc) {
 440                                 code = dump_ep(&hw_ep->ep_out, buf, max);
 441                                 if (code <= 0)
 442                                         break;
 443                                 code = min(code, (int) max);
 444                                 buf += code;
 445                                 max -= code;
 446                         }
 447                 }
 448 #endif
 449         } while (0);
 450
 451         return buf - aBuffer;
 452 }
 453
 454 /* Dump the current status and compile options.
 455  * @param musb the device driver instance
 456  * @param buffer where to dump the status; it must be big enough to hold the
 457  * result otherwise "BAD THINGS HAPPENS(TM)".
 458  */
 459 static int dump_header_stats(struct musb *musb, char *buffer)
 460 {
 461         int code, count = 0;
 462         const void __iomem *mbase = musb->mregs;
 463
 464         *buffer = 0;
 465         count = sprintf(buffer, "Status: %sHDRC, Mode=%s "
 466                                 "(Power=%02x, DevCtl=%02x)\n",
 467                         (musb->is_multipoint ? "M" : ""), MUSB_MODE(musb),
 468                         musb_readb(mbase, MUSB_POWER),
 469                         musb_readb(mbase, MUSB_DEVCTL));
 470         if (count <= 0)
 471                 return 0;
 472         buffer += count;
 473
 474         code = sprintf(buffer, "OTG state: %s; %sactive\n",
 475                         otg_state_string(musb),
 476                         musb->is_active ? "" : "in");
 477         if (code <= 0)
 478                 goto done;
 479         buffer += code;
 480         count += code;
 481
 482         code = sprintf(buffer,
 483                         "Options: "
 484 #ifdef CONFIG_MUSB_PIO_ONLY
 485                         "pio"
 486 #elif defined(CONFIG_USB_TI_CPPI_DMA)
 487                         "cppi-dma"
 488 #elif defined(CONFIG_USB_INVENTRA_DMA)
 489                         "musb-dma"
 490 #elif defined(CONFIG_USB_TUSB_OMAP_DMA)
 491                         "tusb-omap-dma"
 492 #else
 493                         "?dma?"
 494 #endif
 495                         ", "
 496 #ifdef CONFIG_USB_MUSB_OTG
 497                         "otg (peripheral+host)"
 498 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
 499                         "peripheral"
 500 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
 501                         "host"
 502 #endif
 503                         ", debug=%d [eps=%d]\n",
 504                 debug,
 505                 musb->nr_endpoints);
 506         if (code <= 0)
 507                 goto done;
 508         count += code;
 509         buffer += code;
 510
 511 #ifdef  CONFIG_USB_GADGET_MUSB_HDRC
 512         code = sprintf(buffer, "Peripheral address: %02x\n",
 513                         musb_readb(musb->ctrl_base, MUSB_FADDR));
 514         if (code <= 0)
 515                 goto done;
 516         buffer += code;
 517         count += code;
 518 #endif
 519
 520 #ifdef  CONFIG_USB_MUSB_HDRC_HCD
 521         code = sprintf(buffer, "Root port status: %08x\n",
 522                         musb->port1_status);
 523         if (code <= 0)
 524                 goto done;
 525         buffer += code;
 526         count += code;
 527 #endif
 528
 529 #ifdef  CONFIG_ARCH_DAVINCI
 530         code = sprintf(buffer,
 531                         "DaVinci: ctrl=%02x stat=%1x phy=%03x\n"
 532                         "\trndis=%05x auto=%04x intsrc=%08x intmsk=%08x"
 533                         "\n",
 534                         musb_readl(musb->ctrl_base, DAVINCI_USB_CTRL_REG),
 535                         musb_readl(musb->ctrl_base, DAVINCI_USB_STAT_REG),
 536                         __raw_readl((void __force __iomem *)
 537                                         IO_ADDRESS(USBPHY_CTL_PADDR)),
 538                         musb_readl(musb->ctrl_base, DAVINCI_RNDIS_REG),
 539                         musb_readl(musb->ctrl_base, DAVINCI_AUTOREQ_REG),
 540                         musb_readl(musb->ctrl_base,
 541                                         DAVINCI_USB_INT_SOURCE_REG),
 542                         musb_readl(musb->ctrl_base,
 543                                         DAVINCI_USB_INT_MASK_REG));
 544         if (code <= 0)
 545                 goto done;
 546         count += code;
 547         buffer += code;
 548 #endif  /* DAVINCI */
 549
 550 #ifdef CONFIG_USB_TUSB6010
 551         code = sprintf(buffer,
 552                         "TUSB6010: devconf %08x, phy enable %08x drive %08x"
 553                         "\n\totg %03x timer %08x"
 554                         "\n\tprcm conf %08x mgmt %08x; int src %08x mask %08x"
 555                         "\n",
 556                         musb_readl(musb->ctrl_base, TUSB_DEV_CONF),
 557                         musb_readl(musb->ctrl_base, TUSB_PHY_OTG_CTRL_ENABLE),
 558                         musb_readl(musb->ctrl_base, TUSB_PHY_OTG_CTRL),
 559                         musb_readl(musb->ctrl_base, TUSB_DEV_OTG_STAT),
 560                         musb_readl(musb->ctrl_base, TUSB_DEV_OTG_TIMER),
 561                         musb_readl(musb->ctrl_base, TUSB_PRCM_CONF),
 562                         musb_readl(musb->ctrl_base, TUSB_PRCM_MNGMT),
 563                         musb_readl(musb->ctrl_base, TUSB_INT_SRC),
 564                         musb_readl(musb->ctrl_base, TUSB_INT_MASK));
 565         if (code <= 0)
 566                 goto done;
 567         count += code;
 568         buffer += code;
 569 #endif  /* DAVINCI */
 570
 571         if (is_cppi_enabled() && musb->dma_controller) {
 572                 code = sprintf(buffer,
 573                                 "CPPI: txcr=%d txsrc=%01x txena=%01x; "
 574                                 "rxcr=%d rxsrc=%01x rxena=%01x "
 575                                 "\n",
 576                                 musb_readl(musb->ctrl_base,
 577                                                 DAVINCI_TXCPPI_CTRL_REG),
 578                                 musb_readl(musb->ctrl_base,
 579                                                 DAVINCI_TXCPPI_RAW_REG),
 580                                 musb_readl(musb->ctrl_base,
 581                                                 DAVINCI_TXCPPI_INTENAB_REG),
 582                                 musb_readl(musb->ctrl_base,
 583                                                 DAVINCI_RXCPPI_CTRL_REG),
 584                                 musb_readl(musb->ctrl_base,
 585                                                 DAVINCI_RXCPPI_RAW_REG),
 586                                 musb_readl(musb->ctrl_base,
 587                                                 DAVINCI_RXCPPI_INTENAB_REG));
 588                 if (code <= 0)
 589                         goto done;
 590                 count += code;
 591                 buffer += code;
 592         }
 593
 594 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
 595         if (is_peripheral_enabled(musb)) {
 596                 code = sprintf(buffer, "Gadget driver: %s\n",
 597                                 musb->gadget_driver
 598                                         ? musb->gadget_driver->driver.name
 599                                         : "(none)");
 600                 if (code <= 0)
 601                         goto done;
 602                 count += code;
 603                 buffer += code;
 604         }
 605 #endif
 606
 607 done:
 608         return count;
 609 }
 610
 611 /* Write to ProcFS
 612  *
 613  * C soft-connect
 614  * c soft-disconnect
 615  * I enable HS
 616  * i disable HS
 617  * s stop session
 618  * F force session (OTG-unfriendly)
 619  * E rElinquish bus (OTG)
 620  * H request host mode
 621  * h cancel host request
 622  * T start sending TEST_PACKET
 623  * D<num> set/query the debug level
 624  */
 625 static int musb_proc_write(struct file *file, const char __user *buffer,
 626                         unsigned long count, void *data)
 627 {
 628         char cmd;
 629         u8 reg;
 630         struct musb *musb = (struct musb *)data;
 631         void __iomem *mbase = musb->mregs;
 632
 633         /* MOD_INC_USE_COUNT; */
 634
 635         if (unlikely(copy_from_user(&cmd, buffer, 1)))
 636                 return -EFAULT;
 637
 638         switch (cmd) {
 639         case 'C':
 640                 if (mbase) {
 641                         reg = musb_readb(mbase, MUSB_POWER)
 642                                         | MUSB_POWER_SOFTCONN;
 643                         musb_writeb(mbase, MUSB_POWER, reg);
 644                 }
 645                 break;
 646
 647         case 'c':
 648                 if (mbase) {
 649                         reg = musb_readb(mbase, MUSB_POWER)
 650                                         & ~MUSB_POWER_SOFTCONN;
 651                         musb_writeb(mbase, MUSB_POWER, reg);
 652                 }
 653                 break;
 654
 655         case 'I':
 656                 if (mbase) {
 657                         reg = musb_readb(mbase, MUSB_POWER)
 658                                         | MUSB_POWER_HSENAB;
 659                         musb_writeb(mbase, MUSB_POWER, reg);
 660                 }
 661                 break;
 662
 663         case 'i':
 664                 if (mbase) {
 665                         reg = musb_readb(mbase, MUSB_POWER)
 666                                         & ~MUSB_POWER_HSENAB;
 667                         musb_writeb(mbase, MUSB_POWER, reg);
 668                 }
 669                 break;
 670
 671         case 'F':
 672                 reg = musb_readb(mbase, MUSB_DEVCTL);
 673                 reg |= MUSB_DEVCTL_SESSION;
 674                 musb_writeb(mbase, MUSB_DEVCTL, reg);
 675                 break;
 676
 677         case 'H':
 678                 if (mbase) {
 679                         reg = musb_readb(mbase, MUSB_DEVCTL);
 680                         reg |= MUSB_DEVCTL_HR;
 681                         musb_writeb(mbase, MUSB_DEVCTL, reg);
 682                         /* MUSB_HST_MODE( ((struct musb*)data) ); */
 683                         /* WARNING("Host Mode\n"); */
 684                 }
 685                 break;
 686
 687         case 'h':
 688                 if (mbase) {
 689                         reg = musb_readb(mbase, MUSB_DEVCTL);
 690                         reg &= ~MUSB_DEVCTL_HR;
 691                         musb_writeb(mbase, MUSB_DEVCTL, reg);
 692                 }
 693                 break;
 694
 695         case 'T':
 696                 if (mbase) {
 697                         musb_load_testpacket(musb);
 698                         musb_writeb(mbase, MUSB_TESTMODE,
 699                                         MUSB_TEST_PACKET);
 700                 }
 701                 break;
 702
 703 #if (MUSB_DEBUG > 0)
 704                 /* set/read debug level */
 705         case 'D':{
 706                         if (count > 1) {
 707                                 char digits[8], *p = digits;
 708                                 int i = 0, level = 0, sign = 1;
 709                                 int len = min(count - 1, (unsigned long)8);
 710
 711                                 if (copy_from_user(&digits, &buffer[1], len))
 712                                         return -EFAULT;
 713
 714                                 /* optional sign */
 715                                 if (*p == '-') {
 716                                         len -= 1;
 717                                         sign = -sign;
 718                                         p++;
 719                                 }
 720
 721                                 /* read it */
 722                                 while (i++ < len && *p > '0' && *p < '9') {
 723                                         level = level * 10 + (*p - '0');
 724                                         p++;
 725                                 }
 726
 727                                 level *= sign;
 728                                 DBG(1, "debug level %d\n", level);
 729                                 debug = level;
 730                         }
 731                 }
 732                 break;
 733
 734
 735         case '?':
 736                 INFO("?: you are seeing it\n");
 737                 INFO("C/c: soft connect enable/disable\n");
 738                 INFO("I/i: hispeed enable/disable\n");
 739                 INFO("F: force session start\n");
 740                 INFO("H: host mode\n");
 741                 INFO("T: start sending TEST_PACKET\n");
 742                 INFO("D: set/read dbug level\n");
 743                 break;
 744 #endif
 745
 746         default:
 747                 ERR("Command %c not implemented\n", cmd);
 748                 break;
 749         }
 750
 751         musb_platform_try_idle(musb, 0);
 752
 753         return count;
 754 }
 755
 756 static int musb_proc_read(char *page, char **start,
 757                         off_t off, int count, int *eof, void *data)
 758 {
 759         char *buffer = page;
 760         int code = 0;
 761         unsigned long   flags;
 762         struct musb     *musb = data;
 763         unsigned        epnum;
 764
 765         count -= off;
 766         count -= 1;             /* for NUL at end */
 767         if (count <= 0)
 768                 return -EINVAL;
 769
 770         spin_lock_irqsave(&musb->lock, flags);
 771
 772         code = dump_header_stats(musb, buffer);
 773         if (code > 0) {
 774                 buffer += code;
 775                 count -= code;
 776         }
 777
 778         /* generate the report for the end points */
 779         /* REVISIT ... not unless something's connected! */
 780         for (epnum = 0; count >= 0 && epnum < musb->nr_endpoints;
 781                         epnum++) {
 782                 code = dump_end_info(musb, epnum, buffer, count);
 783                 if (code > 0) {
 784                         buffer += code;
 785                         count -= code;
 786                 }
 787         }
 788
 789         musb_platform_try_idle(musb, 0);
 790
 791         spin_unlock_irqrestore(&musb->lock, flags);
 792         *eof = 1;
 793
 794         return buffer - page;
 795 }
 796
 797 void __devexit musb_debug_delete(char *name, struct musb *musb)
 798 {
 799         if (musb->proc_entry)
 800                 remove_proc_entry(name, NULL);
 801 }
 802
 803 struct proc_dir_entry *__init
 804 musb_debug_create(char *name, struct musb *data)
 805 {
 806         struct proc_dir_entry   *pde;
 807
 808         /* FIXME convert everything to seq_file; then later, debugfs */
 809
 810         if (!name)
 811                 return NULL;
 812
 813         data->proc_entry = pde = create_proc_entry(name,
 814                                         S_IFREG | S_IRUGO | S_IWUSR, NULL);
 815         if (pde) {
 816                 pde->data = data;
 817                 /* pde->owner = THIS_MODULE; */
 818
 819                 pde->read_proc = musb_proc_read;
 820                 pde->write_proc = musb_proc_write;
 821
 822                 pde->size = 0;
 823
 824                 pr_debug("Registered /proc/%s\n", name);
 825         } else {
 826                 pr_debug("Cannot create a valid proc file entry");
 827         }
 828
 829         return pde;
 830 }