common/cmd_fdc.c

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG, d.peter@mpl.ch.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  *
  23  */
  24 /*
  25  * Floppy Disk support
  26  */
  27
  28 #include <common.h>
  29 #include <config.h>
  30 #include <command.h>
  31 #include <image.h>
  32
  33
  34 #undef  FDC_DEBUG
  35
  36 #ifdef  FDC_DEBUG
  37 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  38 #else
  39 #define PRINTF(fmt,args...)
  40 #endif
  41
  42 #ifndef TRUE
  43 #define TRUE            1
  44 #endif
  45 #ifndef FALSE
  46 #define FALSE           0
  47 #endif
  48
  49
  50 /*#if (CONFIG_COMMANDS & CFG_CMD_DATE) || defined(CONFIG_CMD_DATE) */
  51 /*#include <rtc.h> */
  52 /*#endif */
  53
  54 #if (CONFIG_COMMANDS & CFG_CMD_FDC) || defined(CONFIG_CMD_FDC) \
  55         || (CONFIG_COMMANDS & CFG_CMD_FDOS) || defined(CONFIG_CMD_FDOS)
  56
  57
  58 typedef struct {
  59         int                                             flags;          /* connected drives ect */
  60         unsigned long blnr;                     /* Logical block nr */
  61         uchar                                   drive;          /* drive no */
  62         uchar                                   cmdlen;         /* cmd length */
  63         uchar                                   cmd[16];        /* cmd desc */
  64         uchar                                   dma;                    /* if > 0 dma enabled */
  65         uchar                                   result[11];/* status information */
  66         uchar                                   resultlen; /* lenght of result */
  67 } FDC_COMMAND_STRUCT;
  68 /* flags: only the lower 8bit used:
  69  * bit 0 if set drive 0 is present
  70  * bit 1 if set drive 1 is present
  71  * bit 2 if set drive 2 is present
  72  * bit 3 if set drive 3 is present
  73  * bit 4 if set disk in drive 0 is inserted
  74  * bit 5 if set disk in drive 1 is inserted
  75  * bit 6 if set disk in drive 2 is inserted
  76  * bit 7 if set disk in drive 4 is inserted
  77  */
  78
  79
  80 /* cmd indexes */
  81 #define COMMAND                 0
  82 #define DRIVE                   1
  83 #define CONFIG0                 1
  84 #define SPEC_HUTSRT     1
  85 #define TRACK                   2
  86 #define CONFIG1                 2
  87 #define SPEC_HLT                2
  88 #define HEAD                            3
  89 #define CONFIG2                 3
  90 #define SECTOR                  4
  91 #define SECTOR_SIZE     5
  92 #define LAST_TRACK      6
  93 #define GAP                                     7
  94 #define DTL                                     8
  95 /* result indexes */
  96 #define STATUS_0                                                0
  97 #define STATUS_PCN                                      1
  98 #define STATUS_1                                                1
  99 #define STATUS_2                                                2
 100 #define STATUS_TRACK                            3
 101 #define STATUS_HEAD                                     4
 102 #define STATUS_SECT                                     5
 103 #define STATUS_SECT_SIZE                6
 104
 105
 106 /* Register addresses */
 107 #define FDC_BASE        0x3F0
 108 #define FDC_SRA         FDC_BASE + 0    /* Status Register A */
 109 #define FDC_SRB         FDC_BASE + 1    /* Status Register B */
 110 #define FDC_DOR         FDC_BASE + 2    /* Digital Output Register */
 111 #define FDC_TDR         FDC_BASE + 3    /* Tape Drive Register */
 112 #define FDC_DSR         FDC_BASE + 4    /* Data rate Register */
 113 #define FDC_MSR         FDC_BASE + 4    /* Main Status Register */
 114 #define FDC_FIFO        FDC_BASE + 5    /* FIFO */
 115 #define FDC_DIR         FDC_BASE + 6    /* Digital Input Register */
 116 #define FDC_CCR         FDC_BASE + 7    /* Configuration Control */
 117 /* Commands */
 118 #define FDC_CMD_SENSE_INT               0x08
 119 #define FDC_CMD_CONFIGURE               0x13
 120 #define FDC_CMD_SPECIFY                         0x03
 121 #define FDC_CMD_RECALIBRATE     0x07
 122 #define FDC_CMD_READ                                    0x06
 123 #define FDC_CMD_READ_TRACK              0x02
 124 #define FDC_CMD_READ_ID                         0x0A
 125 #define FDC_CMD_DUMP_REG                        0x0E
 126 #define FDC_CMD_SEEK                                    0x0F
 127
 128 #define FDC_CMD_SENSE_INT_LEN           0x01
 129 #define FDC_CMD_CONFIGURE_LEN           0x04
 130 #define FDC_CMD_SPECIFY_LEN                             0x03
 131 #define FDC_CMD_RECALIBRATE_LEN         0x02
 132 #define FDC_CMD_READ_LEN                                        0x09
 133 #define FDC_CMD_READ_TRACK_LEN          0x09
 134 #define FDC_CMD_READ_ID_LEN                             0x02
 135 #define FDC_CMD_DUMP_REG_LEN                    0x01
 136 #define FDC_CMD_SEEK_LEN                                        0x03
 137
 138 #define FDC_FIFO_THR                    0x0C
 139 #define FDC_FIFO_DIS                    0x00
 140 #define FDC_IMPLIED_SEEK        0x01
 141 #define FDC_POLL_DIS                    0x00
 142 #define FDC_PRE_TRK                             0x00
 143 #define FDC_CONFIGURE                   FDC_FIFO_THR | (FDC_POLL_DIS<<4) | (FDC_FIFO_DIS<<5) | (FDC_IMPLIED_SEEK << 6)
 144 #define FDC_MFM_MODE                    0x01 /* MFM enable */
 145 #define FDC_SKIP_MODE                   0x00 /* skip enable */
 146
 147 #define FDC_TIME_OUT 100000 /* time out */
 148 #define FDC_RW_RETRIES          3 /* read write retries */
 149 #define FDC_CAL_RETRIES         3 /* calibration and seek retries */
 150
 151
 152 /* Disk structure */
 153 typedef struct  {
 154         unsigned int size;                      /* nr of sectors total */
 155         unsigned int sect;                      /* sectors per track */
 156         unsigned int head;                      /* nr of heads */
 157         unsigned int track;                     /* nr of tracks */
 158         unsigned int stretch;           /* !=0 means double track steps */
 159         unsigned char   gap;                    /* gap1 size */
 160         unsigned char   rate;                   /* data rate. |= 0x40 for perpendicular */
 161         unsigned char   spec1;          /* stepping rate, head unload time */
 162         unsigned char   fmt_gap;        /* gap2 size */
 163         unsigned char hlt;                      /* head load time */
 164         unsigned char sect_code; /* Sector Size code */
 165         const char      * name;                 /* used only for predefined formats */
 166 } FD_GEO_STRUCT;
 167
 168
 169 /* supported Floppy types (currently only one) */
 170 const static FD_GEO_STRUCT floppy_type[2] = {
 171         { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,16,2,"H1440" },    /*  7 1.44MB 3.5"   */
 172         {    0, 0,0, 0,0,0x00,0x00,0x00,0x00, 0,0,NULL    },    /*  end of table    */
 173 };
 174
 175 static FDC_COMMAND_STRUCT cmd; /* global command struct */
 176
 177 /* If the boot drive number is undefined, we assume it's drive 0             */
 178 #ifndef CFG_FDC_DRIVE_NUMBER
 179 #define CFG_FDC_DRIVE_NUMBER 0
 180 #endif
 181
 182 /* Hardware access */
 183 #ifndef CFG_ISA_IO_STRIDE
 184 #define CFG_ISA_IO_STRIDE 1
 185 #endif
 186
 187 #ifndef CFG_ISA_IO_OFFSET
 188 #define CFG_ISA_IO_OFFSET 0
 189 #endif
 190
 191
 192 #ifdef CONFIG_AMIGAONEG3SE
 193 unsigned char INT6_Status;
 194
 195 void fdc_interrupt(void)
 196 {
 197     INT6_Status = 0x80;
 198 }
 199
 200 /* waits for an interrupt (polling) */
 201 int wait_for_fdc_int(void)
 202 {
 203         unsigned long timeout;
 204         timeout = FDC_TIME_OUT;
 205         while(((volatile)INT6_Status & 0x80) == 0) {
 206                 timeout--;
 207                 udelay(10);
 208                 if(timeout == 0) /* timeout occured */
 209                         return FALSE;
 210         }
 211         INT6_Status = 0;
 212         return TRUE;
 213 }
 214 #endif
 215
 216 /* Supporting Functions */
 217 /* reads a Register of the FDC */
 218 unsigned char read_fdc_reg(unsigned int addr)
 219 {
 220         volatile unsigned char *val =
 221                 (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS +
 222                                            (addr * CFG_ISA_IO_STRIDE) +
 223                                            CFG_ISA_IO_OFFSET);
 224
 225         return val [0];
 226 }
 227
 228 /* writes a Register of the FDC */
 229 void write_fdc_reg(unsigned int addr, unsigned char val)
 230 {
 231         volatile unsigned char *tmp =
 232                 (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS +
 233                                            (addr * CFG_ISA_IO_STRIDE) +
 234                                            CFG_ISA_IO_OFFSET);
 235         tmp[0]=val;
 236 }
 237
 238 #ifndef CONFIG_AMIGAONEG3SE
 239 /* waits for an interrupt (polling) */
 240 int wait_for_fdc_int(void)
 241 {
 242         unsigned long timeout;
 243         timeout = FDC_TIME_OUT;
 244         while((read_fdc_reg(FDC_SRA)&0x80)==0) {
 245                 timeout--;
 246                 udelay(10);
 247                 if(timeout==0) /* timeout occured */
 248                         return FALSE;
 249         }
 250         return TRUE;
 251 }
 252
 253 #endif
 254
 255 /* reads a byte from the FIFO of the FDC and checks direction and RQM bit
 256    of the MSR. returns -1 if timeout, or byte if ok */
 257 int read_fdc_byte(void)
 258 {
 259         unsigned long timeout;
 260         timeout = FDC_TIME_OUT;
 261         while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
 262                 /* direction out and ready */
 263                 udelay(10);
 264                 timeout--;
 265                 if(timeout==0) /* timeout occured */
 266                         return -1;
 267         }
 268         return read_fdc_reg(FDC_FIFO);
 269 }
 270
 271 /* if the direction of the FIFO is wrong, this routine is used to
 272    empty the FIFO. Should _not_ be used */
 273 int fdc_need_more_output(void)
 274 {
 275         unsigned char c;
 276         while((read_fdc_reg(FDC_MSR)&0xC0)==0xC0)       {
 277                         c=(unsigned char)read_fdc_byte();
 278                         printf("Error: more output: %x\n",c);
 279         }
 280         return TRUE;
 281 }
 282
 283
 284 /* writes a byte to the FIFO of the FDC and checks direction and RQM bit
 285    of the MSR */
 286 int write_fdc_byte(unsigned char val)
 287 {
 288         unsigned long timeout;
 289         timeout = FDC_TIME_OUT;
 290         while((read_fdc_reg(FDC_MSR)&0xC0)!=0x80) {
 291                 /* direction in and ready for byte */
 292                 timeout--;
 293                 udelay(10);
 294                 fdc_need_more_output();
 295                 if(timeout==0) /* timeout occured */
 296                         return FALSE;
 297         }
 298         write_fdc_reg(FDC_FIFO,val);
 299         return TRUE;
 300 }
 301
 302 /* sets up all FDC commands and issues it to the FDC. If
 303    the command causes direct results (no Execution Phase)
 304    the result is be read as well. */
 305
 306 int fdc_issue_cmd(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
 307 {
 308         int i;
 309         unsigned long head,track,sect,timeout;
 310         track = pCMD->blnr / (pFG->sect * pFG->head); /* track nr */
 311         sect =  pCMD->blnr % (pFG->sect * pFG->head); /* remaining blocks */
 312         head = sect / pFG->sect; /* head nr */
 313         sect =  sect % pFG->sect; /* remaining blocks */
 314         sect++; /* sectors are 1 based */
 315         PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",
 316                 pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr);
 317
 318         if(head|=0) { /* max heads = 2 */
 319                 pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */
 320                 pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
 321         }
 322         else {
 323                 pCMD->cmd[DRIVE]=pCMD->drive; /* head 0 */
 324                 pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
 325         }
 326         pCMD->cmd[TRACK]=(unsigned char) track; /* track */
 327         switch (pCMD->cmd[COMMAND]) {
 328                 case FDC_CMD_READ:
 329                         pCMD->cmd[SECTOR]=(unsigned char) sect; /* sector */
 330                         pCMD->cmd[SECTOR_SIZE]=pFG->sect_code; /* sector size code */
 331                         pCMD->cmd[LAST_TRACK]=pFG->sect; /* End of track */
 332                         pCMD->cmd[GAP]=pFG->gap; /* gap */
 333                         pCMD->cmd[DTL]=0xFF; /* DTL */
 334                         pCMD->cmdlen=FDC_CMD_READ_LEN;
 335                         pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
 336                         pCMD->cmd[COMMAND]|=(FDC_SKIP_MODE<<5); /* set Skip bit */
 337                         pCMD->resultlen=0;  /* result only after execution */
 338                         break;
 339                 case FDC_CMD_SEEK:
 340                         pCMD->cmdlen=FDC_CMD_SEEK_LEN;
 341                         pCMD->resultlen=0;  /* no result */
 342                         break;
 343                 case FDC_CMD_CONFIGURE:
 344                         pCMD->cmd[CONFIG0]=0;
 345                         pCMD->cmd[CONFIG1]=FDC_CONFIGURE; /* FIFO Threshold, Poll, Enable FIFO */
 346                         pCMD->cmd[CONFIG2]=FDC_PRE_TRK;         /* Precompensation Track */
 347                         pCMD->cmdlen=FDC_CMD_CONFIGURE_LEN;
 348                         pCMD->resultlen=0;  /* no result */
 349                         break;
 350                 case FDC_CMD_SPECIFY:
 351                         pCMD->cmd[SPEC_HUTSRT]=pFG->spec1;
 352                         pCMD->cmd[SPEC_HLT]=(pFG->hlt)<<1; /* head load time */
 353                         if(pCMD->dma==0)
 354                                 pCMD->cmd[SPEC_HLT]|=0x1; /* no dma */
 355                         pCMD->cmdlen=FDC_CMD_SPECIFY_LEN;
 356                         pCMD->resultlen=0;  /* no result */
 357                         break;
 358                 case FDC_CMD_DUMP_REG:
 359                         pCMD->cmdlen=FDC_CMD_DUMP_REG_LEN;
 360                         pCMD->resultlen=10;  /* 10 byte result */
 361                         break;
 362                 case FDC_CMD_READ_ID:
 363                         pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
 364                         pCMD->cmdlen=FDC_CMD_READ_ID_LEN;
 365                         pCMD->resultlen=7;  /* 7 byte result */
 366                         break;
 367                 case FDC_CMD_RECALIBRATE:
 368                         pCMD->cmd[DRIVE]&=0x03; /* don't set the head bit */
 369                         pCMD->cmdlen=FDC_CMD_RECALIBRATE_LEN;
 370                         pCMD->resultlen=0;  /* no result */
 371                         break;
 372                         break;
 373                 case FDC_CMD_SENSE_INT:
 374                         pCMD->cmdlen=FDC_CMD_SENSE_INT_LEN;
 375                         pCMD->resultlen=2;
 376                         break;
 377         }
 378         for(i=0;i<pCMD->cmdlen;i++) {
 379                 /* PRINTF("write cmd%d = 0x%02X\n",i,pCMD->cmd[i]); */
 380                 if(write_fdc_byte(pCMD->cmd[i])==FALSE) {
 381                         PRINTF("Error: timeout while issue cmd%d\n",i);
 382                         return FALSE;
 383                 }
 384         }
 385         timeout=FDC_TIME_OUT;
 386         for(i=0;i<pCMD->resultlen;i++) {
 387                 while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
 388                         timeout--;
 389                         if(timeout==0) {
 390                                 PRINTF(" timeout while reading result%d MSR=0x%02X\n",i,read_fdc_reg(FDC_MSR));
 391                                 return FALSE;
 392                         }
 393                 }
 394                 pCMD->result[i]=(unsigned char)read_fdc_byte();
 395         }
 396         return TRUE;
 397 }
 398
 399 /* selects the drive assigned in the cmd structur and
 400    switches on the Motor */
 401 void select_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
 402 {
 403         unsigned char val;
 404
 405         val=(1<<(4+pCMD->drive))|pCMD->drive|0xC; /* set reset, dma gate and motor bits */
 406         if((read_fdc_reg(FDC_DOR)&val)!=val) {
 407                 write_fdc_reg(FDC_DOR,val);
 408                 for(val=0;val<255;val++)
 409                         udelay(500); /* wait some time to start motor */
 410         }
 411 }
 412
 413 /* switches off the Motor of the specified drive */
 414 void stop_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
 415 {
 416         unsigned char val;
 417
 418         val=(1<<(4+pCMD->drive))|pCMD->drive; /* sets motor bits */
 419         write_fdc_reg(FDC_DOR,(read_fdc_reg(FDC_DOR)&~val));
 420 }
 421
 422 /* issues a recalibrate command, waits for interrupt and
 423  * issues a sense_interrupt */
 424 int fdc_recalibrate(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
 425 {
 426         pCMD->cmd[COMMAND]=FDC_CMD_RECALIBRATE;
 427         if(fdc_issue_cmd(pCMD,pFG)==FALSE)
 428                 return FALSE;
 429         while(wait_for_fdc_int()!=TRUE);
 430         pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
 431         return(fdc_issue_cmd(pCMD,pFG));
 432 }
 433
 434 /* issues a recalibrate command, waits for interrupt and
 435  * issues a sense_interrupt */
 436 int fdc_seek(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
 437 {
 438         pCMD->cmd[COMMAND]=FDC_CMD_SEEK;
 439         if(fdc_issue_cmd(pCMD,pFG)==FALSE)
 440                 return FALSE;
 441         while(wait_for_fdc_int()!=TRUE);
 442         pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
 443         return(fdc_issue_cmd(pCMD,pFG));
 444 }
 445
 446 #ifndef CONFIG_AMIGAONEG3SE
 447 /* terminates current command, by not servicing the FIFO
 448  * waits for interrupt and fills in the result bytes */
 449 int fdc_terminate(FDC_COMMAND_STRUCT *pCMD)
 450 {
 451         int i;
 452         for(i=0;i<100;i++)
 453                 udelay(500); /* wait 500usec for fifo overrun */
 454         while((read_fdc_reg(FDC_SRA)&0x80)==0x00); /* wait as long as no int has occured */
 455         for(i=0;i<7;i++) {
 456                 pCMD->result[i]=(unsigned char)read_fdc_byte();
 457         }
 458         return TRUE;
 459 }
 460 #endif
 461 #ifdef CONFIG_AMIGAONEG3SE
 462 int fdc_terminate(FDC_COMMAND_STRUCT *pCMD)
 463 {
 464         int i;
 465         for(i=0;i<100;i++)
 466                 udelay(500); /* wait 500usec for fifo overrun */
 467         while((INT6_Status&0x80)==0x00); /* wait as long as no int has occured */
 468         for(i=0;i<7;i++) {
 469                 pCMD->result[i]=(unsigned char)read_fdc_byte();
 470         }
 471         INT6_Status = 0;
 472         return TRUE;
 473 }
 474
 475 #endif
 476
 477 #ifdef CONFIG_AMIGAONEG3SE
 478 #define disable_interrupts() 0
 479 #define enable_interrupts() (void)0
 480 #endif
 481
 482 /* reads data from FDC, seek commands are issued automatic */
 483 int fdc_read_data(unsigned char *buffer, unsigned long blocks,FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
 484 {
 485   /* first seek to start address */
 486         unsigned long len,lastblk,readblk,i,timeout,ii,offset;
 487         unsigned char pcn,c,retriesrw,retriescal;
 488         unsigned char *bufferw; /* working buffer */
 489         int sect_size;
 490         int flags;
 491
 492         flags=disable_interrupts(); /* switch off all Interrupts */
 493         select_fdc_drive(pCMD); /* switch on drive */
 494         sect_size=0x080<<pFG->sect_code;
 495         retriesrw=0;
 496         retriescal=0;
 497         offset=0;
 498         if(fdc_seek(pCMD,pFG)==FALSE) {
 499                 stop_fdc_drive(pCMD);
 500                 enable_interrupts();
 501                 return FALSE;
 502         }
 503         if((pCMD->result[STATUS_0]&0x20)!=0x20) {
 504                 printf("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
 505                 stop_fdc_drive(pCMD);
 506                 enable_interrupts();
 507                 return FALSE;
 508         }
 509         pcn=pCMD->result[STATUS_PCN]; /* current track */
 510         /* now determine the next seek point */
 511         lastblk=pCMD->blnr + blocks;
 512         /*      readblk=(pFG->head*pFG->sect)-(pCMD->blnr%(pFG->head*pFG->sect)); */
 513         readblk=pFG->sect-(pCMD->blnr%pFG->sect);
 514         PRINTF("1st nr of block possible read %ld start %ld\n",readblk,pCMD->blnr);
 515         if(readblk>blocks) /* is end within 1st track */
 516                 readblk=blocks; /* yes, correct it */
 517         PRINTF("we read %ld blocks start %ld\n",readblk,pCMD->blnr);
 518         bufferw=&buffer[0]; /* setup working buffer */
 519         do {
 520 retryrw:
 521                 len=sect_size * readblk;
 522                 pCMD->cmd[COMMAND]=FDC_CMD_READ;
 523                 if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
 524                         stop_fdc_drive(pCMD);
 525                         enable_interrupts();
 526                         return FALSE;
 527                 }
 528                 for (i=0;i<len;i++) {
 529                         timeout=FDC_TIME_OUT;
 530                         do {
 531                                 c=read_fdc_reg(FDC_MSR);
 532                                 if((c&0xC0)==0xC0) {
 533                                         bufferw[i]=read_fdc_reg(FDC_FIFO);
 534                                         break;
 535                                 }
 536                                 if((c&0xC0)==0x80) { /* output */
 537                                         PRINTF("Transfer error transfered: at %ld, MSR=%02X\n",i,c);
 538                                         if(i>6) {
 539                                                 for(ii=0;ii<7;ii++) {
 540                                                         pCMD->result[ii]=bufferw[(i-7+ii)];
 541                                                 } /* for */
 542                                         }
 543                                         if(retriesrw++>FDC_RW_RETRIES) {
 544                                                 if (retriescal++>FDC_CAL_RETRIES) {
 545                                                         stop_fdc_drive(pCMD);
 546                                                         enable_interrupts();
 547                                                         return FALSE;
 548                                                 }
 549                                                 else {
 550                                                         PRINTF(" trying to recalibrate Try %d\n",retriescal);
 551                                                         if(fdc_recalibrate(pCMD,pFG)==FALSE) {
 552                                                                 stop_fdc_drive(pCMD);
 553                                                                 enable_interrupts();
 554                                                                 return FALSE;
 555                                                         }
 556                                                         retriesrw=0;
 557                                                         goto retrycal;
 558                                                 } /* else >FDC_CAL_RETRIES */
 559                                         }
 560                                         else {
 561                                                 PRINTF("Read retry %d\n",retriesrw);
 562                                                 goto retryrw;
 563                                         } /* else >FDC_RW_RETRIES */
 564                                 }/* if output */
 565                                 timeout--;
 566                         }while(TRUE);
 567                 } /* for len */
 568                 /* the last sector of a track or all data has been read,
 569                  * we need to get the results */
 570                 fdc_terminate(pCMD);
 571                 offset+=(sect_size*readblk); /* set up buffer pointer */
 572                 bufferw=&buffer[offset];
 573                 pCMD->blnr+=readblk; /* update current block nr */
 574                 blocks-=readblk; /* update blocks */
 575                 if(blocks==0)
 576                         break; /* we are finish */
 577                 /* setup new read blocks */
 578                 /*      readblk=pFG->head*pFG->sect; */
 579                 readblk=pFG->sect;
 580                 if(readblk>blocks)
 581                         readblk=blocks;
 582 retrycal:
 583                 /* a seek is necessary */
 584                 if(fdc_seek(pCMD,pFG)==FALSE) {
 585                         stop_fdc_drive(pCMD);
 586                         enable_interrupts();
 587                         return FALSE;
 588                 }
 589                 if((pCMD->result[STATUS_0]&0x20)!=0x20) {
 590                         PRINTF("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
 591                         stop_fdc_drive(pCMD);
 592                         return FALSE;
 593                 }
 594                 pcn=pCMD->result[STATUS_PCN]; /* current track */
 595         }while(TRUE); /* start over */
 596         stop_fdc_drive(pCMD); /* switch off drive */
 597         enable_interrupts();
 598         return TRUE;
 599 }
 600
 601 #ifdef CONFIG_AMIGAONEG3SE
 602 #undef disable_interrupts()
 603 #undef enable_interrupts()
 604 #endif
 605
 606 /* Scan all drives and check if drive is present and disk is inserted */
 607 int fdc_check_drive(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
 608 {
 609         int i,drives,state;
 610   /* OK procedure of data book is satisfied.
 611          * trying to get some information over the drives */
 612         state=0; /* no drives, no disks */
 613         for(drives=0;drives<4;drives++) {
 614                 pCMD->drive=drives;
 615                 select_fdc_drive(pCMD);
 616                 pCMD->blnr=0; /* set to the 1st block */
 617                 if(fdc_recalibrate(pCMD,pFG)==FALSE)
 618                         continue;
 619                 if((pCMD->result[STATUS_0]&0x10)==0x10)
 620                         continue;
 621                 /* ok drive connected check for disk */
 622                 state|=(1<<drives);
 623                 pCMD->blnr=pFG->size; /* set to the last block */
 624                 if(fdc_seek(pCMD,pFG)==FALSE)
 625                         continue;
 626                 pCMD->blnr=0; /* set to the 1st block */
 627                 if(fdc_recalibrate(pCMD,pFG)==FALSE)
 628                         continue;
 629                 pCMD->cmd[COMMAND]=FDC_CMD_READ_ID;
 630                 if(fdc_issue_cmd(pCMD,pFG)==FALSE)
 631                         continue;
 632                 state|=(0x10<<drives);
 633         }
 634         stop_fdc_drive(pCMD);
 635         for(i=0;i<4;i++) {
 636                 PRINTF("Floppy Drive %d %sconnected %sDisk inserted %s\n",i,
 637                         ((state&(1<<i))==(1<<i)) ? "":"not ",
 638                         ((state&(0x10<<i))==(0x10<<i)) ? "":"no ",
 639                         ((state&(0x10<<i))==(0x10<<i)) ? pFG->name : "");
 640         }
 641         pCMD->flags=state;
 642         return TRUE;
 643 }
 644
 645
 646 /**************************************************************************
 647 * int fdc_setup
 648 * setup the fdc according the datasheet
 649 * assuming in PS2 Mode
 650 */
 651 int fdc_setup(int drive, FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
 652 {
 653         int i;
 654
 655 #ifdef CONFIG_AMIGAONEG3SE
 656         irq_install_handler(6, (interrupt_handler_t *)fdc_interrupt, NULL);
 657         i8259_unmask_irq(6);
 658 #endif
 659
 660 #ifdef CFG_FDC_HW_INIT
 661         fdc_hw_init ();
 662 #endif
 663         /* first, we reset the FDC via the DOR */
 664         write_fdc_reg(FDC_DOR,0x00);
 665         for(i=0; i<255; i++) /* then we wait some time */
 666                 udelay(500);
 667         /* then, we clear the reset in the DOR */
 668         pCMD->drive=drive;
 669         select_fdc_drive(pCMD);
 670         /* initialize the CCR */
 671         write_fdc_reg(FDC_CCR,pFG->rate);
 672         /* then initialize the DSR */
 673         write_fdc_reg(FDC_DSR,pFG->rate);
 674         if(wait_for_fdc_int()==FALSE) {
 675                         PRINTF("Time Out after writing CCR\n");
 676                         return FALSE;
 677         }
 678         /* now issue sense Interrupt and status command
 679          * assuming only one drive present (drive 0) */
 680         pCMD->dma=0; /* we don't use any dma at all */
 681         for(i=0;i<4;i++) {
 682                 /* issue sense interrupt for all 4 possible drives */
 683                 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
 684                 if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
 685                         PRINTF("Sense Interrupt for drive %d failed\n",i);
 686                 }
 687         }
 688         /* issue the configure command */
 689         pCMD->drive=drive;
 690         select_fdc_drive(pCMD);
 691         pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE;
 692         if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
 693                 PRINTF(" configure timeout\n");
 694                 stop_fdc_drive(pCMD);
 695                 return FALSE;
 696         }
 697         /* issue specify command */
 698         pCMD->cmd[COMMAND]=FDC_CMD_SPECIFY;
 699         if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
 700                 PRINTF(" specify timeout\n");
 701                 stop_fdc_drive(pCMD);
 702                 return FALSE;
 703
 704         }
 705         /* then, we clear the reset in the DOR */
 706         /* fdc_check_drive(pCMD,pFG);   */
 707         /*      write_fdc_reg(FDC_DOR,0x04); */
 708
 709         return TRUE;
 710 }
 711 #endif /* ((CONFIG_COMMANDS & CFG_CMD_FDC)||(CONFIG_COMMANDS & CFG_CMD_FDOS))*/
 712
 713 #if (CONFIG_COMMANDS & CFG_CMD_FDOS) || defined(CONFIG_CMD_FDOS)
 714
 715 /* Low level functions for the Floppy-DOS layer                              */
 716
 717 /**************************************************************************
 718 * int fdc_fdos_init
 719 * initialize the FDC layer
 720 *
 721 */
 722 int fdc_fdos_init (int drive)
 723 {
 724         FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
 725         FDC_COMMAND_STRUCT *pCMD = &cmd;
 726
 727         /* setup FDC and scan for drives  */
 728         if(fdc_setup(drive,pCMD,pFG)==FALSE) {
 729                 printf("\n** Error in setup FDC **\n");
 730                 return FALSE;
 731         }
 732         if(fdc_check_drive(pCMD,pFG)==FALSE) {
 733                 printf("\n** Error in check_drives **\n");
 734                 return FALSE;
 735         }
 736         if((pCMD->flags&(1<<drive))==0) {
 737                 /* drive not available */
 738                 printf("\n** Drive %d not available **\n",drive);
 739                 return FALSE;
 740         }
 741         if((pCMD->flags&(0x10<<drive))==0) {
 742                 /* no disk inserted */
 743                 printf("\n** No disk inserted in drive %d **\n",drive);
 744                 return FALSE;
 745         }
 746         /* ok, we have a valid source */
 747         pCMD->drive=drive;
 748
 749         /* read first block */
 750         pCMD->blnr=0;
 751         return TRUE;
 752 }
 753 /**************************************************************************
 754 * int fdc_fdos_seek
 755 * parameter is a block number
 756 */
 757 int fdc_fdos_seek (int where)
 758 {
 759         FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
 760         FDC_COMMAND_STRUCT *pCMD = &cmd;
 761
 762         pCMD -> blnr = where ;
 763         return (fdc_seek (pCMD, pFG));
 764 }
 765 /**************************************************************************
 766 * int fdc_fdos_read
 767 *  the length is in block number
 768 */
 769 int fdc_fdos_read (void *buffer, int len)
 770 {
 771         FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
 772         FDC_COMMAND_STRUCT *pCMD = &cmd;
 773
 774         return (fdc_read_data (buffer, len, pCMD, pFG));
 775 }
 776 #endif  /* (CONFIG_COMMANDS & CFG_CMD_FDOS)                                  */
 777
 778 #if (CONFIG_COMMANDS & CFG_CMD_FDC) || defined(CONFIG_CMD_FDC)
 779 /****************************************************************************
 780  * main routine do_fdcboot
 781  */
 782 int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 783 {
 784         FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
 785         FDC_COMMAND_STRUCT *pCMD = &cmd;
 786         unsigned long addr,imsize;
 787         image_header_t *hdr;  /* used for fdc boot */
 788         unsigned char boot_drive;
 789         int i,nrofblk;
 790         char *ep;
 791         int rcode = 0;
 792
 793         switch (argc) {
 794         case 1:
 795                 addr = CFG_LOAD_ADDR;
 796                 boot_drive=CFG_FDC_DRIVE_NUMBER;
 797                 break;
 798         case 2:
 799                 addr = simple_strtoul(argv[1], NULL, 16);
 800                 boot_drive=CFG_FDC_DRIVE_NUMBER;
 801                 break;
 802         case 3:
 803                 addr = simple_strtoul(argv[1], NULL, 16);
 804                 boot_drive=simple_strtoul(argv[2], NULL, 10);
 805                 break;
 806         default:
 807                 printf ("Usage:\n%s\n", cmdtp->usage);
 808                 return 1;
 809         }
 810         /* setup FDC and scan for drives  */
 811         if(fdc_setup(boot_drive,pCMD,pFG)==FALSE) {
 812                 printf("\n** Error in setup FDC **\n");
 813                 return 1;
 814         }
 815         if(fdc_check_drive(pCMD,pFG)==FALSE) {
 816                 printf("\n** Error in check_drives **\n");
 817                 return 1;
 818         }
 819         if((pCMD->flags&(1<<boot_drive))==0) {
 820                 /* drive not available */
 821                 printf("\n** Drive %d not availabe **\n",boot_drive);
 822                 return 1;
 823         }
 824         if((pCMD->flags&(0x10<<boot_drive))==0) {
 825                 /* no disk inserted */
 826                 printf("\n** No disk inserted in drive %d **\n",boot_drive);
 827                 return 1;
 828         }
 829         /* ok, we have a valid source */
 830         pCMD->drive=boot_drive;
 831         /* read first block */
 832         pCMD->blnr=0;
 833         if(fdc_read_data((unsigned char *)addr,1,pCMD,pFG)==FALSE) {
 834                 printf("\nRead error:");
 835                 for(i=0;i<7;i++)
 836                         printf("result%d: 0x%02X\n",i,pCMD->result[i]);
 837                 return 1;
 838         }
 839         hdr = (image_header_t *)addr;
 840         if (ntohl(hdr->ih_magic)  != IH_MAGIC) {
 841                 printf ("Bad Magic Number\n");
 842                 return 1;
 843         }
 844         print_image_hdr(hdr);
 845
 846         imsize= ntohl(hdr->ih_size)+sizeof(image_header_t);
 847         nrofblk=imsize/512;
 848         if((imsize%512)>0)
 849                 nrofblk++;
 850         printf("Loading %ld Bytes (%d blocks) at 0x%08lx..\n",imsize,nrofblk,addr);
 851         pCMD->blnr=0;
 852         if(fdc_read_data((unsigned char *)addr,nrofblk,pCMD,pFG)==FALSE) {
 853                 /* read image block */
 854                 printf("\nRead error:");
 855                 for(i=0;i<7;i++)
 856                         printf("result%d: 0x%02X\n",i,pCMD->result[i]);
 857                 return 1;
 858         }
 859         printf("OK %ld Bytes loaded.\n",imsize);
 860
 861         flush_cache (addr, imsize);
 862         /* Loading ok, update default load address */
 863
 864         load_addr = addr;
 865         if(hdr->ih_type  == IH_TYPE_KERNEL) {
 866                 /* Check if we should attempt an auto-start */
 867                 if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
 868                         char *local_args[2];
 869                         extern int do_bootm (cmd_tbl_t *, int, int, char *[]);
 870
 871                         local_args[0] = argv[0];
 872                         local_args[1] = NULL;
 873
 874                         printf ("Automatic boot of image at addr 0x%08lX ...\n", addr);
 875
 876                         do_bootm (cmdtp, 0, 1, local_args);
 877                         rcode ++;
 878                 }
 879         }
 880         return rcode;
 881 }
 882
 883
 884 #endif /* CONFIG_COMMANDS & CFG_CMD_FDC */
 885
 886
 887 /***************************************************/
 888
 889
 890 #if (CONFIG_COMMANDS & CFG_CMD_FDC) || defined(CONFIG_CMD_FDC)
 891
 892 U_BOOT_CMD(
 893         fdcboot,        3,      1,      do_fdcboot,
 894         "fdcboot - boot from floppy device\n",
 895         "loadAddr drive\n"
 896 );
 897 #endif