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