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