LXR uboot/cmd/fdc.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2001
   4 * Denis Peter, MPL AG, d.peter@mpl.ch.
   5 */
   6/*
   7 * Floppy Disk support
   8 */
   9
  10#include <common.h>
  11#include <config.h>
  12#include <command.h>
  13#include <image.h>
  14
  15
  16#undef  FDC_DEBUG
  17
  18#ifdef  FDC_DEBUG
  19#define PRINTF(fmt,args...)     printf (fmt ,##args)
  20#else
  21#define PRINTF(fmt,args...)
  22#endif
  23
  24/*#if defined(CONFIG_CMD_DATE) */
  25/*#include <rtc.h> */
  26/*#endif */
  27
  28typedef struct {
  29        int             flags;          /* connected drives ect */
  30        unsigned long   blnr;           /* Logical block nr */
  31        uchar           drive;          /* drive no */
  32        uchar           cmdlen;         /* cmd length */
  33        uchar           cmd[16];        /* cmd desc */
  34        uchar           dma;            /* if > 0 dma enabled */
  35        uchar           result[11];     /* status information */
  36        uchar           resultlen;      /* lenght of result */
  37} FDC_COMMAND_STRUCT;
  38
  39/* flags: only the lower 8bit used:
  40 * bit 0 if set drive 0 is present
  41 * bit 1 if set drive 1 is present
  42 * bit 2 if set drive 2 is present
  43 * bit 3 if set drive 3 is present
  44 * bit 4 if set disk in drive 0 is inserted
  45 * bit 5 if set disk in drive 1 is inserted
  46 * bit 6 if set disk in drive 2 is inserted
  47 * bit 7 if set disk in drive 4 is inserted
  48 */
  49
  50/* cmd indexes */
  51#define COMMAND                 0
  52#define DRIVE                   1
  53#define CONFIG0                 1
  54#define SPEC_HUTSRT             1
  55#define TRACK                   2
  56#define CONFIG1                 2
  57#define SPEC_HLT                2
  58#define HEAD                    3
  59#define CONFIG2                 3
  60#define SECTOR                  4
  61#define SECTOR_SIZE             5
  62#define LAST_TRACK              6
  63#define GAP                     7
  64#define DTL                     8
  65/* result indexes */
  66#define STATUS_0                0
  67#define STATUS_PCN              1
  68#define STATUS_1                1
  69#define STATUS_2                2
  70#define STATUS_TRACK            3
  71#define STATUS_HEAD             4
  72#define STATUS_SECT             5
  73#define STATUS_SECT_SIZE        6
  74
  75
  76/* Register addresses */
  77#define FDC_BASE        0x3F0
  78#define FDC_SRA         FDC_BASE + 0    /* Status Register A */
  79#define FDC_SRB         FDC_BASE + 1    /* Status Register B */
  80#define FDC_DOR         FDC_BASE + 2    /* Digital Output Register */
  81#define FDC_TDR         FDC_BASE + 3    /* Tape Drive Register */
  82#define FDC_DSR         FDC_BASE + 4    /* Data rate Register */
  83#define FDC_MSR         FDC_BASE + 4    /* Main Status Register */
  84#define FDC_FIFO        FDC_BASE + 5    /* FIFO */
  85#define FDC_DIR         FDC_BASE + 6    /* Digital Input Register */
  86#define FDC_CCR         FDC_BASE + 7    /* Configuration Control */
  87/* Commands */
  88#define FDC_CMD_SENSE_INT       0x08
  89#define FDC_CMD_CONFIGURE       0x13
  90#define FDC_CMD_SPECIFY         0x03
  91#define FDC_CMD_RECALIBRATE     0x07
  92#define FDC_CMD_READ            0x06
  93#define FDC_CMD_READ_TRACK      0x02
  94#define FDC_CMD_READ_ID         0x0A
  95#define FDC_CMD_DUMP_REG        0x0E
  96#define FDC_CMD_SEEK            0x0F
  97
  98#define FDC_CMD_SENSE_INT_LEN   0x01
  99#define FDC_CMD_CONFIGURE_LEN   0x04
 100#define FDC_CMD_SPECIFY_LEN     0x03
 101#define FDC_CMD_RECALIBRATE_LEN 0x02
 102#define FDC_CMD_READ_LEN        0x09
 103#define FDC_CMD_READ_TRACK_LEN  0x09
 104#define FDC_CMD_READ_ID_LEN     0x02
 105#define FDC_CMD_DUMP_REG_LEN    0x01
 106#define FDC_CMD_SEEK_LEN        0x03
 107
 108#define FDC_FIFO_THR            0x0C
 109#define FDC_FIFO_DIS            0x00
 110#define FDC_IMPLIED_SEEK        0x01
 111#define FDC_POLL_DIS            0x00
 112#define FDC_PRE_TRK             0x00
 113#define FDC_CONFIGURE           FDC_FIFO_THR | (FDC_POLL_DIS<<4) | (FDC_FIFO_DIS<<5) | (FDC_IMPLIED_SEEK << 6)
 114#define FDC_MFM_MODE            0x01 /* MFM enable */
 115#define FDC_SKIP_MODE           0x00 /* skip enable */
 116
 117#define FDC_TIME_OUT 100000 /* time out */
 118#define FDC_RW_RETRIES          3 /* read write retries */
 119#define FDC_CAL_RETRIES         3 /* calibration and seek retries */
 120
 121
 122/* Disk structure */
 123typedef struct  {
 124        unsigned int size;      /* nr of sectors total */
 125        unsigned int sect;      /* sectors per track */
 126        unsigned int head;      /* nr of heads */
 127        unsigned int track;     /* nr of tracks */
 128        unsigned int stretch;   /* !=0 means double track steps */
 129        unsigned char   gap;    /* gap1 size */
 130        unsigned char   rate;   /* data rate. |= 0x40 for perpendicular */
 131        unsigned char   spec1;  /* stepping rate, head unload time */
 132        unsigned char   fmt_gap;/* gap2 size */
 133        unsigned char hlt;      /* head load time */
 134        unsigned char sect_code;/* Sector Size code */
 135        const char      * name; /* used only for predefined formats */
 136} FD_GEO_STRUCT;
 137
 138
 139/* supported Floppy types (currently only one) */
 140const static FD_GEO_STRUCT floppy_type[2] = {
 141        { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,16,2,"H1440" },    /*  7 1.44MB 3.5"   */
 142        {    0, 0,0, 0,0,0x00,0x00,0x00,0x00, 0,0,NULL    },    /*  end of table    */
 143};
 144
 145static FDC_COMMAND_STRUCT cmd; /* global command struct */
 146
 147/* If the boot drive number is undefined, we assume it's drive 0             */
 148#ifndef CONFIG_SYS_FDC_DRIVE_NUMBER
 149#define CONFIG_SYS_FDC_DRIVE_NUMBER 0
 150#endif
 151
 152/* Hardware access */
 153#ifndef CONFIG_SYS_ISA_IO_STRIDE
 154#define CONFIG_SYS_ISA_IO_STRIDE 1
 155#endif
 156
 157#ifndef CONFIG_SYS_ISA_IO_OFFSET
 158#define CONFIG_SYS_ISA_IO_OFFSET 0
 159#endif
 160
 161/* Supporting Functions */
 162/* reads a Register of the FDC */
 163unsigned char read_fdc_reg(unsigned int addr)
 164{
 165        volatile unsigned char *val =
 166                (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
 167                                           (addr * CONFIG_SYS_ISA_IO_STRIDE) +
 168                                           CONFIG_SYS_ISA_IO_OFFSET);
 169
 170        return val [0];
 171}
 172
 173/* writes a Register of the FDC */
 174void write_fdc_reg(unsigned int addr, unsigned char val)
 175{
 176        volatile unsigned char *tmp =
 177                (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
 178                                           (addr * CONFIG_SYS_ISA_IO_STRIDE) +
 179                                           CONFIG_SYS_ISA_IO_OFFSET);
 180        tmp[0]=val;
 181}
 182
 183/* waits for an interrupt (polling) */
 184int wait_for_fdc_int(void)
 185{
 186        unsigned long timeout;
 187        timeout = FDC_TIME_OUT;
 188        while((read_fdc_reg(FDC_SRA)&0x80)==0) {
 189                timeout--;
 190                udelay(10);
 191                if(timeout==0) /* timeout occurred */
 192                        return false;
 193        }
 194        return true;
 195}
 196
 197/* reads a byte from the FIFO of the FDC and checks direction and RQM bit
 198   of the MSR. returns -1 if timeout, or byte if ok */
 199int read_fdc_byte(void)
 200{
 201        unsigned long timeout;
 202        timeout = FDC_TIME_OUT;
 203        while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
 204                /* direction out and ready */
 205                udelay(10);
 206                timeout--;
 207                if(timeout==0) /* timeout occurred */
 208                        return -1;
 209        }
 210        return read_fdc_reg(FDC_FIFO);
 211}
 212
 213/* if the direction of the FIFO is wrong, this routine is used to
 214   empty the FIFO. Should _not_ be used */
 215int fdc_need_more_output(void)
 216{
 217        unsigned char c;
 218        while((read_fdc_reg(FDC_MSR)&0xC0)==0xC0)       {
 219                        c=(unsigned char)read_fdc_byte();
 220                        printf("Error: more output: %x\n",c);
 221        }
 222        return true;
 223}
 224
 225
 226/* writes a byte to the FIFO of the FDC and checks direction and RQM bit
 227   of the MSR */
 228int write_fdc_byte(unsigned char val)
 229{
 230        unsigned long timeout;
 231        timeout = FDC_TIME_OUT;
 232        while((read_fdc_reg(FDC_MSR)&0xC0)!=0x80) {
 233                /* direction in and ready for byte */
 234                timeout--;
 235                udelay(10);
 236                fdc_need_more_output();
 237                if(timeout==0) /* timeout occurred */
 238                        return false;
 239        }
 240        write_fdc_reg(FDC_FIFO,val);
 241        return true;
 242}
 243
 244/* sets up all FDC commands and issues it to the FDC. If
 245   the command causes direct results (no Execution Phase)
 246   the result is be read as well. */
 247
 248int fdc_issue_cmd(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
 249{
 250        int i;
 251        unsigned long head,track,sect,timeout;
 252        track = pCMD->blnr / (pFG->sect * pFG->head); /* track nr */
 253        sect =  pCMD->blnr % (pFG->sect * pFG->head); /* remaining blocks */
 254        head = sect / pFG->sect; /* head nr */
 255        sect =  sect % pFG->sect; /* remaining blocks */
 256        sect++; /* sectors are 1 based */
 257        PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",
 258                pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr);
 259
 260        if(head|=0) { /* max heads = 2 */
 261                pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */
 262                pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
 263        }
 264        else {
 265                pCMD->cmd[DRIVE]=pCMD->drive; /* head 0 */
 266                pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
 267        }
 268        pCMD->cmd[TRACK]=(unsigned char) track; /* track */
 269        switch (pCMD->cmd[COMMAND]) {
 270                case FDC_CMD_READ:
 271                        pCMD->cmd[SECTOR]=(unsigned char) sect; /* sector */
 272                        pCMD->cmd[SECTOR_SIZE]=pFG->sect_code; /* sector size code */
 273                        pCMD->cmd[LAST_TRACK]=pFG->sect; /* End of track */
 274                        pCMD->cmd[GAP]=pFG->gap; /* gap */
 275                        pCMD->cmd[DTL]=0xFF; /* DTL */
 276                        pCMD->cmdlen=FDC_CMD_READ_LEN;
 277                        pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
 278                        pCMD->cmd[COMMAND]|=(FDC_SKIP_MODE<<5); /* set Skip bit */
 279                        pCMD->resultlen=0;  /* result only after execution */
 280                        break;
 281                case FDC_CMD_SEEK:
 282                        pCMD->cmdlen=FDC_CMD_SEEK_LEN;
 283                        pCMD->resultlen=0;  /* no result */
 284                        break;
 285                case FDC_CMD_CONFIGURE:
 286                        pCMD->cmd[CONFIG0]=0;
 287                        pCMD->cmd[CONFIG1]=FDC_CONFIGURE; /* FIFO Threshold, Poll, Enable FIFO */
 288                        pCMD->cmd[CONFIG2]=FDC_PRE_TRK; /* Precompensation Track */
 289                        pCMD->cmdlen=FDC_CMD_CONFIGURE_LEN;
 290                        pCMD->resultlen=0;  /* no result */
 291                        break;
 292                case FDC_CMD_SPECIFY:
 293                        pCMD->cmd[SPEC_HUTSRT]=pFG->spec1;
 294                        pCMD->cmd[SPEC_HLT]=(pFG->hlt)<<1; /* head load time */
 295                        if(pCMD->dma==0)
 296                                pCMD->cmd[SPEC_HLT]|=0x1; /* no dma */
 297                        pCMD->cmdlen=FDC_CMD_SPECIFY_LEN;
 298                        pCMD->resultlen=0;  /* no result */
 299                        break;
 300                case FDC_CMD_DUMP_REG:
 301                        pCMD->cmdlen=FDC_CMD_DUMP_REG_LEN;
 302                        pCMD->resultlen=10;  /* 10 byte result */
 303                        break;
 304                case FDC_CMD_READ_ID:
 305                        pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
 306                        pCMD->cmdlen=FDC_CMD_READ_ID_LEN;
 307                        pCMD->resultlen=7;  /* 7 byte result */
 308                        break;
 309                case FDC_CMD_RECALIBRATE:
 310                        pCMD->cmd[DRIVE]&=0x03; /* don't set the head bit */
 311                        pCMD->cmdlen=FDC_CMD_RECALIBRATE_LEN;
 312                        pCMD->resultlen=0;  /* no result */
 313                        break;
 314                        break;
 315                case FDC_CMD_SENSE_INT:
 316                        pCMD->cmdlen=FDC_CMD_SENSE_INT_LEN;
 317                        pCMD->resultlen=2;
 318                        break;
 319        }
 320        for(i=0;i<pCMD->cmdlen;i++) {
 321                /* PRINTF("write cmd%d = 0x%02X\n",i,pCMD->cmd[i]); */
 322                if (write_fdc_byte(pCMD->cmd[i]) == false) {
 323                        PRINTF("Error: timeout while issue cmd%d\n",i);
 324                        return false;
 325                }
 326        }
 327        timeout=FDC_TIME_OUT;
 328        for(i=0;i<pCMD->resultlen;i++) {
 329                while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
 330                        timeout--;
 331                        if(timeout==0) {
 332                                PRINTF(" timeout while reading result%d MSR=0x%02X\n",i,read_fdc_reg(FDC_MSR));
 333                                return false;
 334                        }
 335                }
 336                pCMD->result[i]=(unsigned char)read_fdc_byte();
 337        }
 338        return true;
 339}
 340
 341/* selects the drive assigned in the cmd structur and
 342   switches on the Motor */
 343void select_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
 344{
 345        unsigned char val;
 346
 347        val=(1<<(4+pCMD->drive))|pCMD->drive|0xC; /* set reset, dma gate and motor bits */
 348        if((read_fdc_reg(FDC_DOR)&val)!=val) {
 349                write_fdc_reg(FDC_DOR,val);
 350                for(val=0;val<255;val++)
 351                        udelay(500); /* wait some time to start motor */
 352        }
 353}
 354
 355/* switches off the Motor of the specified drive */
 356void stop_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
 357{
 358        unsigned char val;
 359
 360        val=(1<<(4+pCMD->drive))|pCMD->drive; /* sets motor bits */
 361        write_fdc_reg(FDC_DOR,(read_fdc_reg(FDC_DOR)&~val));
 362}
 363
 364/* issues a recalibrate command, waits for interrupt and
 365 * issues a sense_interrupt */
 366int fdc_recalibrate(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
 367{
 368        pCMD->cmd[COMMAND]=FDC_CMD_RECALIBRATE;
 369        if (fdc_issue_cmd(pCMD, pFG) == false)
 370                return false;
 371        while (wait_for_fdc_int() != true);
 372
 373        pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
 374        return(fdc_issue_cmd(pCMD,pFG));
 375}
 376
 377/* issues a recalibrate command, waits for interrupt and
 378 * issues a sense_interrupt */
 379int fdc_seek(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
 380{
 381        pCMD->cmd[COMMAND]=FDC_CMD_SEEK;
 382        if (fdc_issue_cmd(pCMD, pFG) == false)
 383                return false;
 384        while (wait_for_fdc_int() != true);
 385
 386        pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
 387        return(fdc_issue_cmd(pCMD,pFG));
 388}
 389
 390/* terminates current command, by not servicing the FIFO
 391 * waits for interrupt and fills in the result bytes */
 392int fdc_terminate(FDC_COMMAND_STRUCT *pCMD)
 393{
 394        int i;
 395        for(i=0;i<100;i++)
 396                udelay(500); /* wait 500usec for fifo overrun */
 397        while((read_fdc_reg(FDC_SRA)&0x80)==0x00); /* wait as long as no int has occurred */
 398        for(i=0;i<7;i++) {
 399                pCMD->result[i]=(unsigned char)read_fdc_byte();
 400        }
 401        return true;
 402}
 403
 404/* reads data from FDC, seek commands are issued automatic */
 405int fdc_read_data(unsigned char *buffer, unsigned long blocks,FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
 406{
 407  /* first seek to start address */
 408        unsigned long len,readblk,i,timeout,ii,offset;
 409        unsigned char c,retriesrw,retriescal;
 410        unsigned char *bufferw; /* working buffer */
 411        int sect_size;
 412        int flags;
 413
 414        flags=disable_interrupts(); /* switch off all Interrupts */
 415        select_fdc_drive(pCMD); /* switch on drive */
 416        sect_size=0x080<<pFG->sect_code;
 417        retriesrw=0;
 418        retriescal=0;
 419        offset=0;
 420        if (fdc_seek(pCMD, pFG) == false) {
 421                stop_fdc_drive(pCMD);
 422                if (flags)
 423                        enable_interrupts();
 424                return false;
 425        }
 426        if((pCMD->result[STATUS_0]&0x20)!=0x20) {
 427                printf("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
 428                stop_fdc_drive(pCMD);
 429                if (flags)
 430                        enable_interrupts();
 431                return false;
 432        }
 433        /* now determine the next seek point */
 434        /*      lastblk=pCMD->blnr + blocks; */
 435        /*      readblk=(pFG->head*pFG->sect)-(pCMD->blnr%(pFG->head*pFG->sect)); */
 436        readblk=pFG->sect-(pCMD->blnr%pFG->sect);
 437        PRINTF("1st nr of block possible read %ld start %ld\n",readblk,pCMD->blnr);
 438        if(readblk>blocks) /* is end within 1st track */
 439                readblk=blocks; /* yes, correct it */
 440        PRINTF("we read %ld blocks start %ld\n",readblk,pCMD->blnr);
 441        bufferw = &buffer[0]; /* setup working buffer */
 442        do {
 443retryrw:
 444                len=sect_size * readblk;
 445                pCMD->cmd[COMMAND]=FDC_CMD_READ;
 446                if (fdc_issue_cmd(pCMD, pFG) == false) {
 447                        stop_fdc_drive(pCMD);
 448                        if (flags)
 449                                enable_interrupts();
 450                        return false;
 451                }
 452                for (i=0;i<len;i++) {
 453                        timeout=FDC_TIME_OUT;
 454                        do {
 455                                c=read_fdc_reg(FDC_MSR);
 456                                if((c&0xC0)==0xC0) {
 457                                        bufferw[i]=read_fdc_reg(FDC_FIFO);
 458                                        break;
 459                                }
 460                                if((c&0xC0)==0x80) { /* output */
 461                                        PRINTF("Transfer error transferred: at %ld, MSR=%02X\n",i,c);
 462                                        if(i>6) {
 463                                                for(ii=0;ii<7;ii++) {
 464                                                        pCMD->result[ii]=bufferw[(i-7+ii)];
 465                                                } /* for */
 466                                        }
 467                                        if(retriesrw++>FDC_RW_RETRIES) {
 468                                                if (retriescal++>FDC_CAL_RETRIES) {
 469                                                        stop_fdc_drive(pCMD);
 470                                                        if (flags)
 471                                                                enable_interrupts();
 472                                                        return false;
 473                                                }
 474                                                else {
 475                                                        PRINTF(" trying to recalibrate Try %d\n",retriescal);
 476                                                        if (fdc_recalibrate(pCMD, pFG) == false) {
 477                                                                stop_fdc_drive(pCMD);
 478                                                                if (flags)
 479                                                                        enable_interrupts();
 480                                                                return false;
 481                                                        }
 482                                                        retriesrw=0;
 483                                                        goto retrycal;
 484                                                } /* else >FDC_CAL_RETRIES */
 485                                        }
 486                                        else {
 487                                                PRINTF("Read retry %d\n",retriesrw);
 488                                                goto retryrw;
 489                                        } /* else >FDC_RW_RETRIES */
 490                                }/* if output */
 491                                timeout--;
 492                        } while (true);
 493                } /* for len */
 494                /* the last sector of a track or all data has been read,
 495                 * we need to get the results */
 496                fdc_terminate(pCMD);
 497                offset+=(sect_size*readblk); /* set up buffer pointer */
 498                bufferw = &buffer[offset];
 499                pCMD->blnr+=readblk; /* update current block nr */
 500                blocks-=readblk; /* update blocks */
 501                if(blocks==0)
 502                        break; /* we are finish */
 503                /* setup new read blocks */
 504                /*      readblk=pFG->head*pFG->sect; */
 505                readblk=pFG->sect;
 506                if(readblk>blocks)
 507                        readblk=blocks;
 508retrycal:
 509                /* a seek is necessary */
 510                if (fdc_seek(pCMD, pFG) == false) {
 511                        stop_fdc_drive(pCMD);
 512                        if (flags)
 513                                enable_interrupts();
 514                        return false;
 515                }
 516                if((pCMD->result[STATUS_0]&0x20)!=0x20) {
 517                        PRINTF("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
 518                        stop_fdc_drive(pCMD);
 519                        return false;
 520                }
 521        } while (true); /* start over */
 522        stop_fdc_drive(pCMD); /* switch off drive */
 523        if (flags)
 524                enable_interrupts();
 525        return true;
 526}
 527
 528/* Scan all drives and check if drive is present and disk is inserted */
 529int fdc_check_drive(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
 530{
 531        int i,drives,state;
 532  /* OK procedure of data book is satisfied.
 533         * trying to get some information over the drives */
 534        state=0; /* no drives, no disks */
 535        for(drives=0;drives<4;drives++) {
 536                pCMD->drive=drives;
 537                select_fdc_drive(pCMD);
 538                pCMD->blnr=0; /* set to the 1st block */
 539                if (fdc_recalibrate(pCMD, pFG) == false)
 540                        continue;
 541                if((pCMD->result[STATUS_0]&0x10)==0x10)
 542                        continue;
 543                /* ok drive connected check for disk */
 544                state|=(1<<drives);
 545                pCMD->blnr=pFG->size; /* set to the last block */
 546                if (fdc_seek(pCMD, pFG) == false)
 547                        continue;
 548                pCMD->blnr=0; /* set to the 1st block */
 549                if (fdc_recalibrate(pCMD, pFG) == false)
 550                        continue;
 551                pCMD->cmd[COMMAND]=FDC_CMD_READ_ID;
 552                if (fdc_issue_cmd(pCMD, pFG) == false)
 553                        continue;
 554                state|=(0x10<<drives);
 555        }
 556        stop_fdc_drive(pCMD);
 557        for(i=0;i<4;i++) {
 558                PRINTF("Floppy Drive %d %sconnected %sDisk inserted %s\n",i,
 559                        ((state&(1<<i))==(1<<i)) ? "":"not ",
 560                        ((state&(0x10<<i))==(0x10<<i)) ? "":"no ",
 561                        ((state&(0x10<<i))==(0x10<<i)) ? pFG->name : "");
 562        }
 563        pCMD->flags=state;
 564        return true;
 565}
 566
 567
 568/**************************************************************************
 569* int fdc_setup
 570* setup the fdc according the datasheet
 571* assuming in PS2 Mode
 572*/
 573int fdc_setup(int drive, FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
 574{
 575        int i;
 576
 577#ifdef CONFIG_SYS_FDC_HW_INIT
 578        fdc_hw_init ();
 579#endif
 580        /* first, we reset the FDC via the DOR */
 581        write_fdc_reg(FDC_DOR,0x00);
 582        for(i=0; i<255; i++) /* then we wait some time */
 583                udelay(500);
 584        /* then, we clear the reset in the DOR */
 585        pCMD->drive=drive;
 586        select_fdc_drive(pCMD);
 587        /* initialize the CCR */
 588        write_fdc_reg(FDC_CCR,pFG->rate);
 589        /* then initialize the DSR */
 590        write_fdc_reg(FDC_DSR,pFG->rate);
 591        if (wait_for_fdc_int() == false) {
 592                        PRINTF("Time Out after writing CCR\n");
 593                        return false;
 594        }
 595        /* now issue sense Interrupt and status command
 596         * assuming only one drive present (drive 0) */
 597        pCMD->dma=0; /* we don't use any dma at all */
 598        for(i=0;i<4;i++) {
 599                /* issue sense interrupt for all 4 possible drives */
 600                pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
 601                if (fdc_issue_cmd(pCMD, pFG) == false) {
 602                        PRINTF("Sense Interrupt for drive %d failed\n",i);
 603                }
 604        }
 605        /* issue the configure command */
 606        pCMD->drive=drive;
 607        select_fdc_drive(pCMD);
 608        pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE;
 609        if (fdc_issue_cmd(pCMD, pFG) == false) {
 610                PRINTF(" configure timeout\n");
 611                stop_fdc_drive(pCMD);
 612                return false;
 613        }
 614        /* issue specify command */
 615        pCMD->cmd[COMMAND]=FDC_CMD_SPECIFY;
 616        if (fdc_issue_cmd(pCMD, pFG) == false) {
 617                PRINTF(" specify timeout\n");
 618                stop_fdc_drive(pCMD);
 619                return false;
 620
 621        }
 622        /* then, we clear the reset in the DOR */
 623        /* fdc_check_drive(pCMD,pFG);   */
 624        /*      write_fdc_reg(FDC_DOR,0x04); */
 625
 626        return true;
 627}
 628
 629/****************************************************************************
 630 * main routine do_fdcboot
 631 */
 632int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 633{
 634        FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
 635        FDC_COMMAND_STRUCT *pCMD = &cmd;
 636        unsigned long addr,imsize;
 637#if defined(CONFIG_LEGACY_IMAGE_FORMAT)
 638        image_header_t *hdr;  /* used for fdc boot */
 639#endif
 640        unsigned char boot_drive;
 641        int i,nrofblk;
 642#if defined(CONFIG_FIT)
 643        const void *fit_hdr = NULL;
 644#endif
 645
 646        switch (argc) {
 647        case 1:
 648                addr = CONFIG_SYS_LOAD_ADDR;
 649                boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
 650                break;
 651        case 2:
 652                addr = simple_strtoul(argv[1], NULL, 16);
 653                boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
 654                break;
 655        case 3:
 656                addr = simple_strtoul(argv[1], NULL, 16);
 657                boot_drive=simple_strtoul(argv[2], NULL, 10);
 658                break;
 659        default:
 660                return CMD_RET_USAGE;
 661        }
 662        /* setup FDC and scan for drives  */
 663        if (fdc_setup(boot_drive, pCMD, pFG) == false) {
 664                printf("\n** Error in setup FDC **\n");
 665                return 1;
 666        }
 667        if (fdc_check_drive(pCMD, pFG) == false) {
 668                printf("\n** Error in check_drives **\n");
 669                return 1;
 670        }
 671        if((pCMD->flags&(1<<boot_drive))==0) {
 672                /* drive not available */
 673                printf("\n** Drive %d not availabe **\n",boot_drive);
 674                return 1;
 675        }
 676        if((pCMD->flags&(0x10<<boot_drive))==0) {
 677                /* no disk inserted */
 678                printf("\n** No disk inserted in drive %d **\n",boot_drive);
 679                return 1;
 680        }
 681        /* ok, we have a valid source */
 682        pCMD->drive=boot_drive;
 683        /* read first block */
 684        pCMD->blnr=0;
 685        if (fdc_read_data((unsigned char *)addr, 1, pCMD, pFG) == false) {
 686                printf("\nRead error:");
 687                for(i=0;i<7;i++)
 688                        printf("result%d: 0x%02X\n",i,pCMD->result[i]);
 689                return 1;
 690        }
 691
 692        switch (genimg_get_format ((void *)addr)) {
 693#if defined(CONFIG_LEGACY_IMAGE_FORMAT)
 694        case IMAGE_FORMAT_LEGACY:
 695                hdr = (image_header_t *)addr;
 696                image_print_contents (hdr);
 697
 698                imsize = image_get_image_size (hdr);
 699                break;
 700#endif
 701#if defined(CONFIG_FIT)
 702        case IMAGE_FORMAT_FIT:
 703                fit_hdr = (const void *)addr;
 704                puts ("Fit image detected...\n");
 705
 706                imsize = fit_get_size (fit_hdr);
 707                break;
 708#endif
 709        default:
 710                puts ("** Unknown image type\n");
 711                return 1;
 712        }
 713
 714        nrofblk=imsize/512;
 715        if((imsize%512)>0)
 716                nrofblk++;
 717        printf("Loading %ld Bytes (%d blocks) at 0x%08lx..\n",imsize,nrofblk,addr);
 718        pCMD->blnr=0;
 719        if (fdc_read_data((unsigned char *)addr, nrofblk, pCMD, pFG) == false) {
 720                /* read image block */
 721                printf("\nRead error:");
 722                for(i=0;i<7;i++)
 723                        printf("result%d: 0x%02X\n",i,pCMD->result[i]);
 724                return 1;
 725        }
 726        printf("OK %ld Bytes loaded.\n",imsize);
 727
 728        flush_cache (addr, imsize);
 729
 730#if defined(CONFIG_FIT)
 731        /* This cannot be done earlier, we need complete FIT image in RAM first */
 732        if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
 733                if (!fit_check_format (fit_hdr)) {
 734                        puts ("** Bad FIT image format\n");
 735                        return 1;
 736                }
 737                fit_print_contents (fit_hdr);
 738        }
 739#endif
 740
 741        /* Loading ok, update default load address */
 742        load_addr = addr;
 743
 744        return bootm_maybe_autostart(cmdtp, argv[0]);
 745}
 746
 747U_BOOT_CMD(
 748        fdcboot,        3,      1,      do_fdcboot,
 749        "boot from floppy device",
 750        "loadAddr drive"
 751);
 752