common/usb_storage.c

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland
   4  *
   5  * Most of this source has been derived from the Linux USB
   6  * project.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  *
  26  */
  27
  28 /* Note:
  29  * Currently only the CBI transport protocoll has been implemented, and it
  30  * is only tested with a TEAC USB Floppy. Other Massstorages with CBI or CB
  31  * transport protocoll may work as well.
  32  */
  33
  34
  35
  36 #include <common.h>
  37 #include <command.h>
  38 #include <asm/processor.h>
  39
  40
  41 #if (CONFIG_COMMANDS & CFG_CMD_USB)
  42 #include <usb.h>
  43
  44 #ifdef CONFIG_USB_STORAGE
  45
  46 #undef  USB_STOR_DEBUG
  47
  48 #ifdef  USB_STOR_DEBUG
  49 #define USB_STOR_PRINTF(fmt,args...)    printf (fmt ,##args)
  50 #else
  51 #define USB_STOR_PRINTF(fmt,args...)
  52 #endif
  53
  54 #include <scsi.h>
  55 /* direction table -- this indicates the direction of the data
  56  * transfer for each command code -- a 1 indicates input
  57  */
  58 unsigned char us_direction[256/8] = {
  59         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
  60         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
  61         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
  62         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  63 };
  64 #define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
  65
  66 static unsigned char usb_stor_buf[512];
  67 static ccb usb_ccb;
  68
  69 /*
  70  * CBI style
  71  */
  72
  73 #define US_CBI_ADSC             0
  74
  75
  76 #define USB_MAX_STOR_DEV 5
  77 static int usb_max_devs; /* number of highest available usb device */
  78
  79 static block_dev_desc_t usb_dev_desc[USB_MAX_STOR_DEV];
  80
  81 struct us_data;
  82 typedef int (*trans_cmnd)(ccb*, struct us_data*);
  83 typedef int (*trans_reset)(struct us_data*);
  84
  85 struct us_data {
  86         struct usb_device       *pusb_dev;       /* this usb_device */
  87         unsigned int            flags;           /* from filter initially */
  88         unsigned char           ifnum;           /* interface number */
  89         unsigned char           ep_in;           /* in endpoint */
  90         unsigned char           ep_out;          /* out ....... */
  91         unsigned char           ep_int;          /* interrupt . */
  92         unsigned char           subclass;        /* as in overview */
  93         unsigned char           protocol;        /* .............. */
  94         unsigned char           attention_done;  /* force attn on first cmd */
  95         unsigned short  ip_data;         /* interrupt data */
  96         int                                                     action;          /* what to do */
  97         int                                                     ip_wanted; /* needed */
  98         int                                                     *irq_handle;     /* for USB int requests */
  99         unsigned int            irqpipe;         /* pipe for release_irq */
 100         unsigned char           irqmaxp;        /* max packed for irq Pipe */
 101         unsigned char   irqinterval; /* Intervall for IRQ Pipe */
 102         ccb                                                     *srb;            /* current srb */
 103         trans_reset                     transport_reset; /* reset routine */
 104         trans_cmnd                      transport; /* transport routine */
 105 };
 106
 107 static struct us_data usb_stor[USB_MAX_STOR_DEV];
 108
 109
 110
 111 #define USB_STOR_TRANSPORT_GOOD    0
 112 #define USB_STOR_TRANSPORT_FAILED -1
 113 #define USB_STOR_TRANSPORT_ERROR  -2
 114
 115
 116
 117
 118
 119
 120 int usb_stor_get_info(struct usb_device *dev, struct us_data *us, block_dev_desc_t *dev_desc);
 121 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,struct us_data *ss);
 122 unsigned long usb_stor_read(int device, unsigned long blknr, unsigned long blkcnt, unsigned long *buffer);
 123 struct usb_device * usb_get_dev_index(int index);
 124 void uhci_show_temp_int_td(void);
 125
 126 block_dev_desc_t *usb_stor_get_dev(int index)
 127 {
 128         return &usb_dev_desc[index];
 129 }
 130
 131
 132 void usb_show_progress(void)
 133 {
 134         printf(".");
 135 }
 136
 137 /*********************************************************************************
 138  * (re)-scan the usb and reports device info
 139  * to the user if mode = 1
 140  * returns current device or -1 if no
 141  */
 142 int usb_stor_scan(int mode)
 143 {
 144         unsigned char i;
 145         struct usb_device *dev;
 146
 147         if(mode==1) {
 148                 printf("scanning bus for storage devices...\n");
 149         }
 150         usb_disable_asynch(1); /* asynch transfer not allowed */
 151
 152         for(i=0;i<USB_MAX_STOR_DEV;i++) {
 153                 memset(&usb_dev_desc[i],0,sizeof(block_dev_desc_t));
 154                 usb_dev_desc[i].target=0xff;
 155                 usb_dev_desc[i].if_type=IF_TYPE_USB;
 156                 usb_dev_desc[i].dev=i;
 157                 usb_dev_desc[i].part_type=PART_TYPE_UNKNOWN;
 158                 usb_dev_desc[i].block_read=usb_stor_read;
 159         }
 160         usb_max_devs=0;
 161         for(i=0;i<USB_MAX_DEVICE;i++) {
 162                 dev=usb_get_dev_index(i); /* get device */
 163                 USB_STOR_PRINTF("i=%d\n",i);
 164                 if(dev==NULL) {
 165                         break; /* no more devices avaiable */
 166                 }
 167                 if(usb_storage_probe(dev,0,&usb_stor[usb_max_devs])) { /* ok, it is a storage devices */
 168                         /* get info and fill it in */
 169
 170                         if(usb_stor_get_info(dev, &usb_stor[usb_max_devs], &usb_dev_desc[usb_max_devs])) {
 171                                 if(mode==1) {
 172                                         printf ("  Device %d: ", usb_max_devs);
 173                                         dev_print(&usb_dev_desc[usb_max_devs]);
 174                                 } /* if mode */
 175                                 usb_max_devs++;
 176                         } /* if get info ok */
 177                 } /* if storage device */
 178                 if(usb_max_devs==USB_MAX_STOR_DEV) {
 179                         printf("max USB Storage Device reached: %d stopping\n",usb_max_devs);
 180                         break;
 181                 }
 182         } /* for */
 183         usb_disable_asynch(0); /* asynch transfer allowed */
 184         if(usb_max_devs>0)
 185                 return 0;
 186         else
 187                 return-1;
 188 }
 189
 190 static int usb_stor_irq(struct usb_device *dev)
 191 {
 192         struct us_data *us;
 193         us=(struct us_data *)dev->privptr;
 194
 195         if(us->ip_wanted) {
 196                 us->ip_wanted=0;
 197         }
 198         return 0;
 199 }
 200
 201
 202 #ifdef  USB_STOR_DEBUG
 203
 204 static void usb_show_srb(ccb * pccb)
 205 {
 206         int i;
 207         printf("SRB: len %d datalen 0x%lX\n ",pccb->cmdlen,pccb->datalen);
 208         for(i=0;i<12;i++) {
 209                 printf("%02X ",pccb->cmd[i]);
 210         }
 211         printf("\n");
 212 }
 213
 214 static void display_int_status(unsigned long tmp)
 215 {
 216         printf("Status: %s %s %s %s %s %s %s\n",
 217                 (tmp & USB_ST_ACTIVE) ? "Active" : "",
 218                 (tmp & USB_ST_STALLED) ? "Stalled" : "",
 219                 (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
 220                 (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
 221                 (tmp & USB_ST_NAK_REC) ? "NAKed" : "",
 222                 (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
 223                 (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
 224 }
 225 #endif
 226 /***********************************************************************
 227  * Data transfer routines
 228  ***********************************************************************/
 229
 230 static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
 231 {
 232         int max_size;
 233         int this_xfer;
 234         int result;
 235         int partial;
 236         int maxtry;
 237         int stat;
 238
 239         /* determine the maximum packet size for these transfers */
 240         max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;
 241
 242         /* while we have data left to transfer */
 243         while (length) {
 244
 245                 /* calculate how long this will be -- maximum or a remainder */
 246                 this_xfer = length > max_size ? max_size : length;
 247                 length -= this_xfer;
 248
 249                 /* setup the retry counter */
 250                 maxtry = 10;
 251
 252                 /* set up the transfer loop */
 253                 do {
 254                         /* transfer the data */
 255                         USB_STOR_PRINTF("Bulk xfer 0x%x(%d) try #%d\n",
 256                                   (unsigned int)buf, this_xfer, 11 - maxtry);
 257                         result = usb_bulk_msg(us->pusb_dev, pipe, buf,
 258                                               this_xfer, &partial, USB_CNTL_TIMEOUT*5);
 259                         USB_STOR_PRINTF("bulk_msg returned %d xferred %d/%d\n",
 260                                   result, partial, this_xfer);
 261                         if(us->pusb_dev->status!=0) {
 262                                 /* if we stall, we need to clear it before we go on */
 263 #ifdef USB_STOR_DEBUG
 264                                 display_int_status(us->pusb_dev->status);
 265 #endif
 266                                 if (us->pusb_dev->status & USB_ST_STALLED) {
 267                                         USB_STOR_PRINTF("stalled ->clearing endpoint halt for pipe 0x%x\n", pipe);
 268                                         stat = us->pusb_dev->status;
 269                                         usb_clear_halt(us->pusb_dev, pipe);
 270                                         us->pusb_dev->status=stat;
 271                                         if(this_xfer == partial) {
 272                                                 USB_STOR_PRINTF("bulk transferred with error %X, but data ok\n",us->pusb_dev->status);
 273                                                 return 0;
 274                                         }
 275                                         else
 276                                                 return result;
 277                                 }
 278                                 if (us->pusb_dev->status & USB_ST_NAK_REC) {
 279                                         USB_STOR_PRINTF("Device NAKed bulk_msg\n");
 280                                         return result;
 281                                 }
 282                                 if(this_xfer == partial) {
 283                                         USB_STOR_PRINTF("bulk transferred with error %d, but data ok\n",us->pusb_dev->status);
 284                                         return 0;
 285                                 }
 286                                 /* if our try counter reaches 0, bail out */
 287                                 USB_STOR_PRINTF("bulk transferred with error %d, data %d\n",us->pusb_dev->status,partial);
 288                                 if (!maxtry--)
 289                                                 return result;
 290                         }
 291                         /* update to show what data was transferred */
 292                         this_xfer -= partial;
 293                         buf += partial;
 294                         /* continue until this transfer is done */
 295                 } while ( this_xfer );
 296         }
 297
 298         /* if we get here, we're done and successful */
 299         return 0;
 300 }
 301
 302 /* FIXME: this reset function doesn't really reset the port, and it
 303  * should. Actually it should probably do what it's doing here, and
 304  * reset the port physically
 305  */
 306 static int usb_stor_CB_reset(struct us_data *us)
 307 {
 308         unsigned char cmd[12];
 309         int result;
 310
 311         USB_STOR_PRINTF("CB_reset\n");
 312         memset(cmd, 0xFF, sizeof(cmd));
 313         cmd[0] = SCSI_SEND_DIAG;
 314         cmd[1] = 4;
 315         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev,0),
 316                                  US_CBI_ADSC, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 317                                  0, us->ifnum, cmd, sizeof(cmd), USB_CNTL_TIMEOUT*5);
 318
 319         /* long wait for reset */
 320         wait_ms(1500);
 321         USB_STOR_PRINTF("CB_reset result %d: status %X clearing endpoint halt\n",result,us->pusb_dev->status);
 322         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
 323         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));
 324
 325         USB_STOR_PRINTF("CB_reset done\n");
 326         return 0;
 327 }
 328
 329 /* FIXME: we also need a CBI_command which sets up the completion
 330  * interrupt, and waits for it
 331  */
 332 int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
 333 {
 334         int result;
 335         int dir_in,retry;
 336         unsigned int pipe;
 337         unsigned long status;
 338
 339         retry=5;
 340                 dir_in=US_DIRECTION(srb->cmd[0]);
 341
 342                 if(dir_in)
 343                         pipe=usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
 344                 else
 345                         pipe=usb_sndbulkpipe(us->pusb_dev, us->ep_out);
 346         while(retry--) {
 347                 USB_STOR_PRINTF("CBI gets a command: Try %d\n",5-retry);
 348 #ifdef USB_STOR_DEBUG
 349                 usb_show_srb(srb);
 350 #endif
 351                 /* let's send the command via the control pipe */
 352                 result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev,0),
 353                                          US_CBI_ADSC, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 354                                          0, us->ifnum,
 355                                          srb->cmd, srb->cmdlen, USB_CNTL_TIMEOUT*5);
 356                 USB_STOR_PRINTF("CB_transport: control msg returned %d, status %X\n",result,us->pusb_dev->status);
 357                 /* check the return code for the command */
 358                 if (result < 0) {
 359                         if(us->pusb_dev->status & USB_ST_STALLED) {
 360                                 status=us->pusb_dev->status;
 361                                 USB_STOR_PRINTF(" stall during command found, clear pipe\n");
 362                                 usb_clear_halt(us->pusb_dev,  usb_sndctrlpipe(us->pusb_dev,0));
 363                                 us->pusb_dev->status=status;
 364                         }
 365                         USB_STOR_PRINTF(" error during command %02X Stat = %X\n",srb->cmd[0],us->pusb_dev->status);
 366                         return result;
 367                 }
 368                 /* transfer the data payload for this command, if one exists*/
 369
 370                 USB_STOR_PRINTF("CB_transport: control msg returned %d, direction is %s to go 0x%lx\n",result,dir_in ? "IN" : "OUT",srb->datalen);
 371                 if (srb->datalen) {
 372                         result = us_one_transfer(us, pipe, srb->pdata,srb->datalen);
 373                         USB_STOR_PRINTF("CBI attempted to transfer data, result is %d status %lX, len %d\n", result,us->pusb_dev->status,us->pusb_dev->act_len);
 374                         if(!(us->pusb_dev->status & USB_ST_NAK_REC))
 375                                 break;
 376                 } /* if (srb->datalen) */
 377                 else
 378                         break;
 379         }
 380         /* return result */
 381
 382         return result;
 383 }
 384
 385
 386 int usb_stor_CBI_get_status(ccb *srb, struct us_data *us)
 387 {
 388         int timeout;
 389
 390         us->ip_wanted=1;
 391         submit_int_msg(us->pusb_dev,us->irqpipe,
 392                         (void *)&us->ip_data,us->irqmaxp ,us->irqinterval);
 393   timeout=1000;
 394   while(timeout--) {
 395         if((volatile int *)us->ip_wanted==0)
 396                         break;
 397                 wait_ms(10);
 398         }
 399         if (us->ip_wanted) {
 400                 printf("       Did not get interrupt on CBI\n");
 401                 us->ip_wanted = 0;
 402                 return USB_STOR_TRANSPORT_ERROR;
 403         }
 404         USB_STOR_PRINTF("Got interrupt data 0x%x, transfered %d status 0x%lX\n", us->ip_data,us->pusb_dev->irq_act_len,us->pusb_dev->irq_status);
 405         /* UFI gives us ASC and ASCQ, like a request sense */
 406         if (us->subclass == US_SC_UFI) {
 407                 if (srb->cmd[0] == SCSI_REQ_SENSE ||
 408                     srb->cmd[0] == SCSI_INQUIRY)
 409                         return USB_STOR_TRANSPORT_GOOD; /* Good */
 410                 else
 411                         if (us->ip_data)
 412                                 return USB_STOR_TRANSPORT_FAILED;
 413                         else
 414                                 return USB_STOR_TRANSPORT_GOOD;
 415         }
 416         /* otherwise, we interpret the data normally */
 417         switch (us->ip_data) {
 418                 case 0x0001:
 419                         return USB_STOR_TRANSPORT_GOOD;
 420                 case 0x0002:
 421                         return USB_STOR_TRANSPORT_FAILED;
 422                 default:
 423                         return USB_STOR_TRANSPORT_ERROR;
 424         } /* switch */
 425         return USB_STOR_TRANSPORT_ERROR;
 426 }
 427
 428 #define USB_TRANSPORT_UNKNOWN_RETRY 5
 429 #define USB_TRANSPORT_NOT_READY_RETRY 10
 430
 431 int usb_stor_CB_transport(ccb *srb, struct us_data *us)
 432 {
 433         int result,status;
 434         ccb *psrb;
 435         ccb reqsrb;
 436         int retry,notready;
 437
 438         psrb=&reqsrb;
 439         status=USB_STOR_TRANSPORT_GOOD;
 440         retry=0;
 441         notready=0;
 442         /* issue the command */
 443 do_retry:
 444         result=usb_stor_CB_comdat(srb,us);
 445         USB_STOR_PRINTF("command / Data returned %d, status %X\n",result,us->pusb_dev->status);
 446         /* if this is an CBI Protocol, get IRQ */
 447         if(us->protocol==US_PR_CBI) {
 448                 status=usb_stor_CBI_get_status(srb,us);
 449                 /* if the status is error, report it */
 450                 if(status==USB_STOR_TRANSPORT_ERROR) {
 451                         USB_STOR_PRINTF(" USB CBI Command Error\n");
 452                         return status;
 453                 }
 454                 srb->sense_buf[12]=(unsigned char)(us->ip_data>>8);
 455                 srb->sense_buf[13]=(unsigned char)(us->ip_data&0xff);
 456                 if(!us->ip_data) {
 457                 /* if the status is good, report it */
 458                         if(status==USB_STOR_TRANSPORT_GOOD) {
 459                                 USB_STOR_PRINTF(" USB CBI Command Good\n");
 460                                 return status;
 461                         }
 462                 }
 463         }
 464         /* do we have to issue an auto request? */
 465         /* HERE we have to check the result */
 466         if((result<0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
 467                 USB_STOR_PRINTF("ERROR %X\n",us->pusb_dev->status);
 468                 us->transport_reset(us);
 469                 return USB_STOR_TRANSPORT_ERROR;
 470         }
 471         if((us->protocol==US_PR_CBI) &&
 472                         ((srb->cmd[0]==SCSI_REQ_SENSE) ||
 473                         (srb->cmd[0]==SCSI_INQUIRY))) { /* do not issue an autorequest after request sense */
 474                 USB_STOR_PRINTF("No auto request and good\n");
 475                 return USB_STOR_TRANSPORT_GOOD;
 476         }
 477         /* issue an request_sense */
 478         memset(&psrb->cmd[0],0,12);
 479         psrb->cmd[0]=SCSI_REQ_SENSE;
 480         psrb->cmd[1]=srb->lun<<5;
 481         psrb->cmd[4]=18;
 482         psrb->datalen=18;
 483         psrb->pdata=&srb->sense_buf[0];
 484         psrb->cmdlen=12;
 485         /* issue the command */
 486         result=usb_stor_CB_comdat(psrb,us);
 487         USB_STOR_PRINTF("auto request returned %d\n",result);
 488         /* if this is an CBI Protocol, get IRQ */
 489         if(us->protocol==US_PR_CBI) {
 490                 status=usb_stor_CBI_get_status(psrb,us);
 491         }
 492         if((result<0)&&!(us->pusb_dev->status & USB_ST_STALLED)) {
 493                 USB_STOR_PRINTF(" AUTO REQUEST ERROR %d\n",us->pusb_dev->status);
 494                 return USB_STOR_TRANSPORT_ERROR;
 495         }
 496         USB_STOR_PRINTF("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",srb->sense_buf[0],srb->sense_buf[2],srb->sense_buf[12],srb->sense_buf[13]);
 497         /* Check the auto request result */
 498         if((srb->sense_buf[2]==0) &&
 499                  (srb->sense_buf[12]==0) &&
 500                  (srb->sense_buf[13]==0)) /* ok, no sense */
 501                 return USB_STOR_TRANSPORT_GOOD;
 502         /* Check the auto request result */
 503         switch(srb->sense_buf[2]) {
 504                 case 0x01: /* Recovered Error */
 505                         return USB_STOR_TRANSPORT_GOOD;
 506                         break;
 507                 case 0x02: /* Not Ready */
 508                         if(notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
 509                                 printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X 0x%02X (NOT READY)\n",
 510                                         srb->cmd[0],srb->sense_buf[0],srb->sense_buf[2],srb->sense_buf[12],srb->sense_buf[13]);
 511                                 return USB_STOR_TRANSPORT_FAILED;
 512                         }
 513                         else {
 514                                 wait_ms(100);
 515                                 goto do_retry;
 516                         }
 517                         break;
 518                 default:
 519                         if(retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
 520                                 printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
 521                                         srb->cmd[0],srb->sense_buf[0],srb->sense_buf[2],srb->sense_buf[12],srb->sense_buf[13]);
 522                                 return USB_STOR_TRANSPORT_FAILED;
 523                         }
 524                         else
 525                                 goto do_retry;
 526                         break;
 527         }
 528         return USB_STOR_TRANSPORT_FAILED;
 529 }
 530
 531
 532
 533 static int usb_inquiry(ccb *srb,struct us_data *ss)
 534 {
 535         int retry,i;
 536         retry=3;
 537         do {
 538                 memset(&srb->cmd[0],0,12);
 539                 srb->cmd[0]=SCSI_INQUIRY;
 540                 srb->cmd[1]=srb->lun<<5;
 541                 srb->cmd[4]=36;
 542                 srb->datalen=36;
 543                 srb->cmdlen=12;
 544                 i=ss->transport(srb,ss);
 545                 USB_STOR_PRINTF("inquiry returns %d\n",i);
 546                 if(i==0)
 547                         break;
 548         }while(retry--);
 549         if(!retry) {
 550                 printf("error in inquiry\n");
 551                 return -1;
 552         }
 553         return 0;
 554 }
 555
 556 static int usb_request_sense(ccb *srb,struct us_data *ss)
 557 {
 558         char *ptr;
 559         return 0;
 560         ptr=srb->pdata;
 561         memset(&srb->cmd[0],0,12);
 562         srb->cmd[0]=SCSI_REQ_SENSE;
 563         srb->cmd[1]=srb->lun<<5;
 564         srb->cmd[4]=18;
 565         srb->datalen=18;
 566         srb->pdata=&srb->sense_buf[0];
 567         srb->cmdlen=12;
 568         ss->transport(srb,ss);
 569         USB_STOR_PRINTF("Request Sense returned %02X %02X %02X\n",srb->sense_buf[2],srb->sense_buf[12],srb->sense_buf[13]);
 570         srb->pdata=ptr;
 571         return 0;
 572 }
 573
 574 static int usb_test_unit_ready(ccb *srb,struct us_data *ss)
 575 {
 576         int retries=10;
 577         do {
 578                 memset(&srb->cmd[0],0,12);
 579                 srb->cmd[0]=SCSI_TST_U_RDY;
 580                 srb->cmd[1]=srb->lun<<5;
 581                 srb->datalen=0;
 582                 srb->cmdlen=12;
 583                 if(ss->transport(srb,ss)==USB_STOR_TRANSPORT_GOOD)
 584                 {
 585                         return 0;
 586                 }
 587         } while(retries--);
 588         return -1;
 589 }
 590
 591 static int usb_read_capacity(ccb *srb,struct us_data *ss)
 592 {
 593         int retry;
 594         retry=2; /* retries */
 595         do {
 596                 memset(&srb->cmd[0],0,12);
 597                 srb->cmd[0]=SCSI_RD_CAPAC;
 598                 srb->cmd[1]=srb->lun<<5;
 599                 srb->datalen=8;
 600                 srb->cmdlen=12;
 601                 if(ss->transport(srb,ss)==USB_STOR_TRANSPORT_GOOD) {
 602                         return 0;
 603                 }
 604         }while(retry--);
 605         return -1;
 606 }
 607
 608 static int usb_read_10(ccb *srb,struct us_data *ss, unsigned long start, unsigned short blocks)
 609 {
 610         memset(&srb->cmd[0],0,12);
 611         srb->cmd[0]=SCSI_READ10;
 612         srb->cmd[1]=srb->lun<<5;
 613         srb->cmd[2]=((unsigned char) (start>>24))&0xff;
 614         srb->cmd[3]=((unsigned char) (start>>16))&0xff;
 615         srb->cmd[4]=((unsigned char) (start>>8))&0xff;
 616         srb->cmd[5]=((unsigned char) (start))&0xff;
 617         srb->cmd[7]=((unsigned char) (blocks>>8))&0xff;
 618         srb->cmd[8]=(unsigned char) blocks & 0xff;
 619         srb->cmdlen=12;
 620         USB_STOR_PRINTF("read10: start %lx blocks %x\n",start,blocks);
 621         return ss->transport(srb,ss);
 622 }
 623
 624
 625 #define USB_MAX_READ_BLK 20
 626
 627 unsigned long usb_stor_read(int device, unsigned long blknr, unsigned long blkcnt, unsigned long *buffer)
 628 {
 629         unsigned long start,blks, buf_addr;
 630         unsigned short smallblks;
 631         struct usb_device *dev;
 632         int retry,i;
 633         ccb *srb=&usb_ccb;
 634         device&=0xff;
 635         /* Setup  device
 636          */
 637         USB_STOR_PRINTF("\nusb_read: dev %d \n",device);
 638         dev=NULL;
 639         for(i=0;i<USB_MAX_DEVICE;i++) {
 640                 dev=usb_get_dev_index(i);
 641                 if(dev==NULL) {
 642                         return 0;
 643                 }
 644                 if(dev->devnum==usb_dev_desc[device].target)
 645                         break;
 646         }
 647
 648         usb_disable_asynch(1); /* asynch transfer not allowed */
 649         srb->lun=usb_dev_desc[device].lun;
 650         buf_addr=(unsigned long)buffer;
 651         start=blknr;
 652         blks=blkcnt;
 653         if(usb_test_unit_ready(srb,(struct us_data *)dev->privptr)) {
 654                 printf("Device NOT ready\n   Request Sense returned %02X %02X %02X\n",
 655                         srb->sense_buf[2],srb->sense_buf[12],srb->sense_buf[13]);
 656                 return 0;
 657         }
 658         USB_STOR_PRINTF("\nusb_read: dev %d startblk %lx, blccnt %lx buffer %lx\n",device,start,blks, buf_addr);
 659         do {
 660                 retry=2;
 661                 srb->pdata=(unsigned char *)buf_addr;
 662                 if(blks>USB_MAX_READ_BLK) {
 663                         smallblks=USB_MAX_READ_BLK;
 664                 }
 665                 else {
 666                         smallblks=(unsigned short) blks;
 667                 }
 668 retry_it:
 669                 if(smallblks==USB_MAX_READ_BLK)
 670                         usb_show_progress();
 671                 srb->datalen=usb_dev_desc[device].blksz * smallblks;
 672                 srb->pdata=(unsigned char *)buf_addr;
 673                 if(usb_read_10(srb,(struct us_data *)dev->privptr, start, smallblks)) {
 674                         USB_STOR_PRINTF("Read ERROR\n");
 675                         usb_request_sense(srb,(struct us_data *)dev->privptr);
 676                         if(retry--)
 677                                 goto retry_it;
 678                         blkcnt-=blks;
 679                         break;
 680                 }
 681                 start+=smallblks;
 682                 blks-=smallblks;
 683                 buf_addr+=srb->datalen;
 684         } while(blks!=0);
 685         USB_STOR_PRINTF("usb_read: end startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
 686         usb_disable_asynch(0); /* asynch transfer allowed */
 687         if(blkcnt>=USB_MAX_READ_BLK)
 688                 printf("\n");
 689         return(blkcnt);
 690 }
 691
 692
 693 /* Probe to see if a new device is actually a Storage device */
 694 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,struct us_data *ss)
 695 {
 696         struct usb_interface_descriptor *iface;
 697         int i;
 698         unsigned int flags = 0;
 699
 700         int protocol = 0;
 701         int subclass = 0;
 702
 703
 704         memset(ss, 0, sizeof(struct us_data));
 705
 706         /* let's examine the device now */
 707         iface = &dev->config.if_desc[ifnum];
 708
 709 #if 0
 710         /* this is the place to patch some storage devices */
 711         USB_STOR_PRINTF("iVendor %X iProduct %X\n",dev->descriptor.idVendor,dev->descriptor.idProduct);
 712         if ((dev->descriptor.idVendor) == 0x066b && (dev->descriptor.idProduct) == 0x0103) {
 713                 USB_STOR_PRINTF("patched for E-USB\n");
 714                 protocol = US_PR_CB;
 715                 subclass = US_SC_UFI;       /* an assumption */
 716         }
 717 #endif
 718
 719         if (dev->descriptor.bDeviceClass != 0 ||
 720                         iface->bInterfaceClass != USB_CLASS_MASS_STORAGE ||
 721                         iface->bInterfaceSubClass < US_SC_MIN ||
 722                         iface->bInterfaceSubClass > US_SC_MAX) {
 723                 /* if it's not a mass storage, we go no further */
 724                 return 0;
 725         }
 726
 727         /* At this point, we know we've got a live one */
 728         USB_STOR_PRINTF("\n\nUSB Mass Storage device detected\n");
 729
 730         /* Initialize the us_data structure with some useful info */
 731         ss->flags = flags;
 732         ss->ifnum = ifnum;
 733         ss->pusb_dev = dev;
 734         ss->attention_done = 0;
 735
 736         /* If the device has subclass and protocol, then use that.  Otherwise,
 737          * take data from the specific interface.
 738          */
 739         if (subclass) {
 740                 ss->subclass = subclass;
 741                 ss->protocol = protocol;
 742         } else {
 743                 ss->subclass = iface->bInterfaceSubClass;
 744                 ss->protocol = iface->bInterfaceProtocol;
 745         }
 746
 747         /* set the handler pointers based on the protocol */
 748         USB_STOR_PRINTF("Transport: ");
 749         switch (ss->protocol) {
 750         case US_PR_CB:
 751                 USB_STOR_PRINTF("Control/Bulk\n");
 752                 ss->transport = usb_stor_CB_transport;
 753                 ss->transport_reset = usb_stor_CB_reset;
 754                 break;
 755
 756         case US_PR_CBI:
 757                 USB_STOR_PRINTF("Control/Bulk/Interrupt\n");
 758                 ss->transport = usb_stor_CB_transport;
 759                 ss->transport_reset = usb_stor_CB_reset;
 760                 break;
 761         default:
 762                 printf("USB Starage Transport unknown / not yet implemented\n");
 763                 return 0;
 764                 break;
 765         }
 766
 767         /*
 768          * We are expecting a minimum of 2 endpoints - in and out (bulk).
 769          * An optional interrupt is OK (necessary for CBI protocol).
 770          * We will ignore any others.
 771          */
 772         for (i = 0; i < iface->bNumEndpoints; i++) {
 773                 /* is it an BULK endpoint? */
 774                 if ((iface->ep_desc[i].bmAttributes &  USB_ENDPOINT_XFERTYPE_MASK)
 775                     == USB_ENDPOINT_XFER_BULK) {
 776                         if (iface->ep_desc[i].bEndpointAddress & USB_DIR_IN)
 777                                 ss->ep_in = iface->ep_desc[i].bEndpointAddress &
 778                                         USB_ENDPOINT_NUMBER_MASK;
 779                         else
 780                                 ss->ep_out = iface->ep_desc[i].bEndpointAddress &
 781                                         USB_ENDPOINT_NUMBER_MASK;
 782                 }
 783
 784                 /* is it an interrupt endpoint? */
 785                 if ((iface->ep_desc[i].bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
 786                     == USB_ENDPOINT_XFER_INT) {
 787                         ss->ep_int = iface->ep_desc[i].bEndpointAddress &
 788                                 USB_ENDPOINT_NUMBER_MASK;
 789                         ss->irqinterval = iface->ep_desc[i].bInterval;
 790                 }
 791         }
 792         USB_STOR_PRINTF("Endpoints In %d Out %d Int %d\n",
 793                   ss->ep_in, ss->ep_out, ss->ep_int);
 794
 795         /* Do some basic sanity checks, and bail if we find a problem */
 796         if (usb_set_interface(dev, iface->bInterfaceNumber, 0) ||
 797             !ss->ep_in || !ss->ep_out ||
 798             (ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
 799                 USB_STOR_PRINTF("Problems with device\n");
 800                 return 0;
 801         }
 802         /* set class specific stuff */
 803         /* We only handle certain protocols.  Currently, this is
 804          * the only one.
 805          */
 806         if (ss->subclass != US_SC_UFI) {
 807                 printf("Sorry, protocol %d not yet supported.\n",ss->subclass);
 808                 return 0;
 809         }
 810         if(ss->ep_int) /* we had found an interrupt endpoint, prepare irq pipe */
 811         {
 812                 /* set up the IRQ pipe and handler */
 813
 814                 ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
 815                 ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
 816                 ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
 817                 dev->irq_handle=usb_stor_irq;
 818                 dev->privptr=(void *)ss;
 819         }
 820         return 1;
 821 }
 822
 823 int usb_stor_get_info(struct usb_device *dev,struct us_data *ss,block_dev_desc_t *dev_desc)
 824 {
 825         unsigned char perq,modi;
 826         unsigned long cap[2];
 827         unsigned long *capacity,*blksz;
 828         ccb *pccb=&usb_ccb;
 829
 830         ss->transport_reset(ss);
 831         pccb->pdata=usb_stor_buf;
 832
 833         dev_desc->target=dev->devnum;
 834         pccb->lun=dev_desc->lun;
 835         USB_STOR_PRINTF(" address %d\n",dev_desc->target);
 836
 837         if(usb_inquiry(pccb,ss))
 838                 return -1;
 839         perq=usb_stor_buf[0];
 840         modi=usb_stor_buf[1];
 841         if((perq & 0x1f)==0x1f) {
 842                 return 0; /* skip unknown devices */
 843         }
 844         if((modi&0x80)==0x80) {/* drive is removable */
 845                 dev_desc->removable=1;
 846         }
 847         memcpy(&dev_desc->vendor[0], &usb_stor_buf[8], 8);
 848         memcpy(&dev_desc->product[0], &usb_stor_buf[16], 16);
 849         memcpy(&dev_desc->revision[0], &usb_stor_buf[32], 4);
 850         dev_desc->vendor[8]=0;
 851         dev_desc->product[16]=0;
 852         dev_desc->revision[4]=0;
 853         USB_STOR_PRINTF("ISO Vers %X, Response Data %X\n",usb_stor_buf[2],usb_stor_buf[3]);
 854         if(usb_test_unit_ready(pccb,ss)) {
 855                 printf("Device NOT ready\n   Request Sense returned %02X %02X %02X\n",pccb->sense_buf[2],pccb->sense_buf[12],pccb->sense_buf[13]);
 856                 if(dev_desc->removable==1) {
 857                         dev_desc->type=perq;
 858                         return 1;
 859                 }
 860                 else
 861                         return 0;
 862         }
 863         pccb->pdata=(unsigned char *)&cap[0];
 864         memset(pccb->pdata,0,8);
 865         if(usb_read_capacity(pccb,ss)!=0) {
 866                 printf("READ_CAP ERROR\n");
 867                 cap[0]=2880;
 868                 cap[1]=0x200;
 869         }
 870         USB_STOR_PRINTF("Read Capacity returns: 0x%lx, 0x%lx\n",cap[0],cap[1]);
 871 #if 0
 872         if(cap[0]>(0x200000 * 10)) /* greater than 10 GByte */
 873                 cap[0]>>=16;
 874 #endif
 875         cap[0]+=1;
 876         capacity=&cap[0];
 877         blksz=&cap[1];
 878         USB_STOR_PRINTF("Capacity = 0x%lx, blocksz = 0x%lx\n",*capacity,*blksz);
 879         dev_desc->lba=*capacity;
 880         dev_desc->blksz=*blksz;
 881         dev_desc->type=perq;
 882         USB_STOR_PRINTF(" address %d\n",dev_desc->target);
 883         USB_STOR_PRINTF("partype: %d\n",dev_desc->part_type);
 884
 885         init_part(dev_desc);
 886
 887         USB_STOR_PRINTF("partype: %d\n",dev_desc->part_type);
 888         return 1;
 889 }
 890
 891 #endif
 892 #endif /* CONFIG_USB_STORAGE */
 893
 894
 895