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