omap5_common.h: Switch to ext4
[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 #ifndef TRUE
43 #define TRUE            1
44 #endif
45 #ifndef FALSE
46 #define FALSE           0
47 #endif
49 /*#if defined(CONFIG_CMD_DATE) */
50 /*#include <rtc.h> */
51 /*#endif */
53 typedef struct {
54         int             flags;          /* connected drives ect */
55         unsigned long   blnr;           /* Logical block nr */
56         uchar           drive;          /* drive no */
57         uchar           cmdlen;         /* cmd length */
58         uchar           cmd[16];        /* cmd desc */
59         uchar           dma;            /* if > 0 dma enabled */
60         uchar           result[11];     /* status information */
61         uchar           resultlen;      /* lenght of result */
62 } FDC_COMMAND_STRUCT;
64 /* flags: only the lower 8bit used:
65  * bit 0 if set drive 0 is present
66  * bit 1 if set drive 1 is present
67  * bit 2 if set drive 2 is present
68  * bit 3 if set drive 3 is present
69  * bit 4 if set disk in drive 0 is inserted
70  * bit 5 if set disk in drive 1 is inserted
71  * bit 6 if set disk in drive 2 is inserted
72  * bit 7 if set disk in drive 4 is inserted
73  */
75 /* cmd indexes */
76 #define COMMAND                 0
77 #define DRIVE                   1
78 #define CONFIG0                 1
79 #define SPEC_HUTSRT             1
80 #define TRACK                   2
81 #define CONFIG1                 2
82 #define SPEC_HLT                2
83 #define HEAD                    3
84 #define CONFIG2                 3
85 #define SECTOR                  4
86 #define SECTOR_SIZE             5
87 #define LAST_TRACK              6
88 #define GAP                     7
89 #define DTL                     8
90 /* result indexes */
91 #define STATUS_0                0
92 #define STATUS_PCN              1
93 #define STATUS_1                1
94 #define STATUS_2                2
95 #define STATUS_TRACK            3
96 #define STATUS_HEAD             4
97 #define STATUS_SECT             5
98 #define STATUS_SECT_SIZE        6
101 /* Register addresses */
102 #define FDC_BASE        0x3F0
103 #define FDC_SRA         FDC_BASE + 0    /* Status Register A */
104 #define FDC_SRB         FDC_BASE + 1    /* Status Register B */
105 #define FDC_DOR         FDC_BASE + 2    /* Digital Output Register */
106 #define FDC_TDR         FDC_BASE + 3    /* Tape Drive Register */
107 #define FDC_DSR         FDC_BASE + 4    /* Data rate Register */
108 #define FDC_MSR         FDC_BASE + 4    /* Main Status Register */
109 #define FDC_FIFO        FDC_BASE + 5    /* FIFO */
110 #define FDC_DIR         FDC_BASE + 6    /* Digital Input Register */
111 #define FDC_CCR         FDC_BASE + 7    /* Configuration Control */
112 /* Commands */
113 #define FDC_CMD_SENSE_INT       0x08
114 #define FDC_CMD_CONFIGURE       0x13
115 #define FDC_CMD_SPECIFY         0x03
116 #define FDC_CMD_RECALIBRATE     0x07
117 #define FDC_CMD_READ            0x06
118 #define FDC_CMD_READ_TRACK      0x02
119 #define FDC_CMD_READ_ID         0x0A
120 #define FDC_CMD_DUMP_REG        0x0E
121 #define FDC_CMD_SEEK            0x0F
123 #define FDC_CMD_SENSE_INT_LEN   0x01
124 #define FDC_CMD_CONFIGURE_LEN   0x04
125 #define FDC_CMD_SPECIFY_LEN     0x03
126 #define FDC_CMD_RECALIBRATE_LEN 0x02
127 #define FDC_CMD_READ_LEN        0x09
128 #define FDC_CMD_READ_TRACK_LEN  0x09
129 #define FDC_CMD_READ_ID_LEN     0x02
130 #define FDC_CMD_DUMP_REG_LEN    0x01
131 #define FDC_CMD_SEEK_LEN        0x03
133 #define FDC_FIFO_THR            0x0C
134 #define FDC_FIFO_DIS            0x00
135 #define FDC_IMPLIED_SEEK        0x01
136 #define FDC_POLL_DIS            0x00
137 #define FDC_PRE_TRK             0x00
138 #define FDC_CONFIGURE           FDC_FIFO_THR | (FDC_POLL_DIS<<4) | (FDC_FIFO_DIS<<5) | (FDC_IMPLIED_SEEK << 6)
139 #define FDC_MFM_MODE            0x01 /* MFM enable */
140 #define FDC_SKIP_MODE           0x00 /* skip enable */
142 #define FDC_TIME_OUT 100000 /* time out */
143 #define FDC_RW_RETRIES          3 /* read write retries */
144 #define FDC_CAL_RETRIES         3 /* calibration and seek retries */
147 /* Disk structure */
148 typedef struct  {
149         unsigned int size;      /* nr of sectors total */
150         unsigned int sect;      /* sectors per track */
151         unsigned int head;      /* nr of heads */
152         unsigned int track;     /* nr of tracks */
153         unsigned int stretch;   /* !=0 means double track steps */
154         unsigned char   gap;    /* gap1 size */
155         unsigned char   rate;   /* data rate. |= 0x40 for perpendicular */
156         unsigned char   spec1;  /* stepping rate, head unload time */
157         unsigned char   fmt_gap;/* gap2 size */
158         unsigned char hlt;      /* head load time */
159         unsigned char sect_code;/* Sector Size code */
160         const char      * name; /* used only for predefined formats */
161 } FD_GEO_STRUCT;
164 /* supported Floppy types (currently only one) */
165 const static FD_GEO_STRUCT floppy_type[2] = {
166         { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,16,2,"H1440" },    /*  7 1.44MB 3.5"   */
167         {    0, 0,0, 0,0,0x00,0x00,0x00,0x00, 0,0,NULL    },    /*  end of table    */
168 };
170 static FDC_COMMAND_STRUCT cmd; /* global command struct */
172 /* If the boot drive number is undefined, we assume it's drive 0             */
173 #ifndef CONFIG_SYS_FDC_DRIVE_NUMBER
174 #define CONFIG_SYS_FDC_DRIVE_NUMBER 0
175 #endif
177 /* Hardware access */
178 #ifndef CONFIG_SYS_ISA_IO_STRIDE
179 #define CONFIG_SYS_ISA_IO_STRIDE 1
180 #endif
182 #ifndef CONFIG_SYS_ISA_IO_OFFSET
183 #define CONFIG_SYS_ISA_IO_OFFSET 0
184 #endif
186 /* Supporting Functions */
187 /* reads a Register of the FDC */
188 unsigned char read_fdc_reg(unsigned int addr)
190         volatile unsigned char *val =
191                 (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
192                                            (addr * CONFIG_SYS_ISA_IO_STRIDE) +
193                                            CONFIG_SYS_ISA_IO_OFFSET);
195         return val [0];
198 /* writes a Register of the FDC */
199 void write_fdc_reg(unsigned int addr, unsigned char val)
201         volatile unsigned char *tmp =
202                 (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
203                                            (addr * CONFIG_SYS_ISA_IO_STRIDE) +
204                                            CONFIG_SYS_ISA_IO_OFFSET);
205         tmp[0]=val;
208 /* waits for an interrupt (polling) */
209 int wait_for_fdc_int(void)
211         unsigned long timeout;
212         timeout = FDC_TIME_OUT;
213         while((read_fdc_reg(FDC_SRA)&0x80)==0) {
214                 timeout--;
215                 udelay(10);
216                 if(timeout==0) /* timeout occured */
217                         return FALSE;
218         }
219         return TRUE;
222 /* reads a byte from the FIFO of the FDC and checks direction and RQM bit
223    of the MSR. returns -1 if timeout, or byte if ok */
224 int read_fdc_byte(void)
226         unsigned long timeout;
227         timeout = FDC_TIME_OUT;
228         while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
229                 /* direction out and ready */
230                 udelay(10);
231                 timeout--;
232                 if(timeout==0) /* timeout occured */
233                         return -1;
234         }
235         return read_fdc_reg(FDC_FIFO);
238 /* if the direction of the FIFO is wrong, this routine is used to
239    empty the FIFO. Should _not_ be used */
240 int fdc_need_more_output(void)
242         unsigned char c;
243         while((read_fdc_reg(FDC_MSR)&0xC0)==0xC0)       {
244                         c=(unsigned char)read_fdc_byte();
245                         printf("Error: more output: %x\n",c);
246         }
247         return TRUE;
251 /* writes a byte to the FIFO of the FDC and checks direction and RQM bit
252    of the MSR */
253 int write_fdc_byte(unsigned char val)
255         unsigned long timeout;
256         timeout = FDC_TIME_OUT;
257         while((read_fdc_reg(FDC_MSR)&0xC0)!=0x80) {
258                 /* direction in and ready for byte */
259                 timeout--;
260                 udelay(10);
261                 fdc_need_more_output();
262                 if(timeout==0) /* timeout occured */
263                         return FALSE;
264         }
265         write_fdc_reg(FDC_FIFO,val);
266         return TRUE;
269 /* sets up all FDC commands and issues it to the FDC. If
270    the command causes direct results (no Execution Phase)
271    the result is be read as well. */
273 int fdc_issue_cmd(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
275         int i;
276         unsigned long head,track,sect,timeout;
277         track = pCMD->blnr / (pFG->sect * pFG->head); /* track nr */
278         sect =  pCMD->blnr % (pFG->sect * pFG->head); /* remaining blocks */
279         head = sect / pFG->sect; /* head nr */
280         sect =  sect % pFG->sect; /* remaining blocks */
281         sect++; /* sectors are 1 based */
282         PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",
283                 pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr);
285         if(head|=0) { /* max heads = 2 */
286                 pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */
287                 pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
288         }
289         else {
290                 pCMD->cmd[DRIVE]=pCMD->drive; /* head 0 */
291                 pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
292         }
293         pCMD->cmd[TRACK]=(unsigned char) track; /* track */
294         switch (pCMD->cmd[COMMAND]) {
295                 case FDC_CMD_READ:
296                         pCMD->cmd[SECTOR]=(unsigned char) sect; /* sector */
297                         pCMD->cmd[SECTOR_SIZE]=pFG->sect_code; /* sector size code */
298                         pCMD->cmd[LAST_TRACK]=pFG->sect; /* End of track */
299                         pCMD->cmd[GAP]=pFG->gap; /* gap */
300                         pCMD->cmd[DTL]=0xFF; /* DTL */
301                         pCMD->cmdlen=FDC_CMD_READ_LEN;
302                         pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
303                         pCMD->cmd[COMMAND]|=(FDC_SKIP_MODE<<5); /* set Skip bit */
304                         pCMD->resultlen=0;  /* result only after execution */
305                         break;
306                 case FDC_CMD_SEEK:
307                         pCMD->cmdlen=FDC_CMD_SEEK_LEN;
308                         pCMD->resultlen=0;  /* no result */
309                         break;
310                 case FDC_CMD_CONFIGURE:
311                         pCMD->cmd[CONFIG0]=0;
312                         pCMD->cmd[CONFIG1]=FDC_CONFIGURE; /* FIFO Threshold, Poll, Enable FIFO */
313                         pCMD->cmd[CONFIG2]=FDC_PRE_TRK; /* Precompensation Track */
314                         pCMD->cmdlen=FDC_CMD_CONFIGURE_LEN;
315                         pCMD->resultlen=0;  /* no result */
316                         break;
317                 case FDC_CMD_SPECIFY:
318                         pCMD->cmd[SPEC_HUTSRT]=pFG->spec1;
319                         pCMD->cmd[SPEC_HLT]=(pFG->hlt)<<1; /* head load time */
320                         if(pCMD->dma==0)
321                                 pCMD->cmd[SPEC_HLT]|=0x1; /* no dma */
322                         pCMD->cmdlen=FDC_CMD_SPECIFY_LEN;
323                         pCMD->resultlen=0;  /* no result */
324                         break;
325                 case FDC_CMD_DUMP_REG:
326                         pCMD->cmdlen=FDC_CMD_DUMP_REG_LEN;
327                         pCMD->resultlen=10;  /* 10 byte result */
328                         break;
329                 case FDC_CMD_READ_ID:
330                         pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
331                         pCMD->cmdlen=FDC_CMD_READ_ID_LEN;
332                         pCMD->resultlen=7;  /* 7 byte result */
333                         break;
334                 case FDC_CMD_RECALIBRATE:
335                         pCMD->cmd[DRIVE]&=0x03; /* don't set the head bit */
336                         pCMD->cmdlen=FDC_CMD_RECALIBRATE_LEN;
337                         pCMD->resultlen=0;  /* no result */
338                         break;
339                         break;
340                 case FDC_CMD_SENSE_INT:
341                         pCMD->cmdlen=FDC_CMD_SENSE_INT_LEN;
342                         pCMD->resultlen=2;
343                         break;
344         }
345         for(i=0;i<pCMD->cmdlen;i++) {
346                 /* PRINTF("write cmd%d = 0x%02X\n",i,pCMD->cmd[i]); */
347                 if(write_fdc_byte(pCMD->cmd[i])==FALSE) {
348                         PRINTF("Error: timeout while issue cmd%d\n",i);
349                         return FALSE;
350                 }
351         }
352         timeout=FDC_TIME_OUT;
353         for(i=0;i<pCMD->resultlen;i++) {
354                 while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
355                         timeout--;
356                         if(timeout==0) {
357                                 PRINTF(" timeout while reading result%d MSR=0x%02X\n",i,read_fdc_reg(FDC_MSR));
358                                 return FALSE;
359                         }
360                 }
361                 pCMD->result[i]=(unsigned char)read_fdc_byte();
362         }
363         return TRUE;
366 /* selects the drive assigned in the cmd structur and
367    switches on the Motor */
368 void select_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
370         unsigned char val;
372         val=(1<<(4+pCMD->drive))|pCMD->drive|0xC; /* set reset, dma gate and motor bits */
373         if((read_fdc_reg(FDC_DOR)&val)!=val) {
374                 write_fdc_reg(FDC_DOR,val);
375                 for(val=0;val<255;val++)
376                         udelay(500); /* wait some time to start motor */
377         }
380 /* switches off the Motor of the specified drive */
381 void stop_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
383         unsigned char val;
385         val=(1<<(4+pCMD->drive))|pCMD->drive; /* sets motor bits */
386         write_fdc_reg(FDC_DOR,(read_fdc_reg(FDC_DOR)&~val));
389 /* issues a recalibrate command, waits for interrupt and
390  * issues a sense_interrupt */
391 int fdc_recalibrate(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
393         pCMD->cmd[COMMAND]=FDC_CMD_RECALIBRATE;
394         if(fdc_issue_cmd(pCMD,pFG)==FALSE)
395                 return FALSE;
396         while(wait_for_fdc_int()!=TRUE);
397         pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
398         return(fdc_issue_cmd(pCMD,pFG));
401 /* issues a recalibrate command, waits for interrupt and
402  * issues a sense_interrupt */
403 int fdc_seek(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
405         pCMD->cmd[COMMAND]=FDC_CMD_SEEK;
406         if(fdc_issue_cmd(pCMD,pFG)==FALSE)
407                 return FALSE;
408         while(wait_for_fdc_int()!=TRUE);
409         pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
410         return(fdc_issue_cmd(pCMD,pFG));
413 /* terminates current command, by not servicing the FIFO
414  * waits for interrupt and fills in the result bytes */
415 int fdc_terminate(FDC_COMMAND_STRUCT *pCMD)
417         int i;
418         for(i=0;i<100;i++)
419                 udelay(500); /* wait 500usec for fifo overrun */
420         while((read_fdc_reg(FDC_SRA)&0x80)==0x00); /* wait as long as no int has occured */
421         for(i=0;i<7;i++) {
422                 pCMD->result[i]=(unsigned char)read_fdc_byte();
423         }
424         return TRUE;
427 /* reads data from FDC, seek commands are issued automatic */
428 int fdc_read_data(unsigned char *buffer, unsigned long blocks,FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
430   /* first seek to start address */
431         unsigned long len,readblk,i,timeout,ii,offset;
432         unsigned char c,retriesrw,retriescal;
433         unsigned char *bufferw; /* working buffer */
434         int sect_size;
435         int flags;
437         flags=disable_interrupts(); /* switch off all Interrupts */
438         select_fdc_drive(pCMD); /* switch on drive */
439         sect_size=0x080<<pFG->sect_code;
440         retriesrw=0;
441         retriescal=0;
442         offset=0;
443         if(fdc_seek(pCMD,pFG)==FALSE) {
444                 stop_fdc_drive(pCMD);
445                 if (flags)
446                         enable_interrupts();
447                 return FALSE;
448         }
449         if((pCMD->result[STATUS_0]&0x20)!=0x20) {
450                 printf("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
451                 stop_fdc_drive(pCMD);
452                 if (flags)
453                         enable_interrupts();
454                 return FALSE;
455         }
456         /* now determine the next seek point */
457         /*      lastblk=pCMD->blnr + blocks; */
458         /*      readblk=(pFG->head*pFG->sect)-(pCMD->blnr%(pFG->head*pFG->sect)); */
459         readblk=pFG->sect-(pCMD->blnr%pFG->sect);
460         PRINTF("1st nr of block possible read %ld start %ld\n",readblk,pCMD->blnr);
461         if(readblk>blocks) /* is end within 1st track */
462                 readblk=blocks; /* yes, correct it */
463         PRINTF("we read %ld blocks start %ld\n",readblk,pCMD->blnr);
464         bufferw = &buffer[0]; /* setup working buffer */
465         do {
466 retryrw:
467                 len=sect_size * readblk;
468                 pCMD->cmd[COMMAND]=FDC_CMD_READ;
469                 if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
470                         stop_fdc_drive(pCMD);
471                         if (flags)
472                                 enable_interrupts();
473                         return FALSE;
474                 }
475                 for (i=0;i<len;i++) {
476                         timeout=FDC_TIME_OUT;
477                         do {
478                                 c=read_fdc_reg(FDC_MSR);
479                                 if((c&0xC0)==0xC0) {
480                                         bufferw[i]=read_fdc_reg(FDC_FIFO);
481                                         break;
482                                 }
483                                 if((c&0xC0)==0x80) { /* output */
484                                         PRINTF("Transfer error transfered: at %ld, MSR=%02X\n",i,c);
485                                         if(i>6) {
486                                                 for(ii=0;ii<7;ii++) {
487                                                         pCMD->result[ii]=bufferw[(i-7+ii)];
488                                                 } /* for */
489                                         }
490                                         if(retriesrw++>FDC_RW_RETRIES) {
491                                                 if (retriescal++>FDC_CAL_RETRIES) {
492                                                         stop_fdc_drive(pCMD);
493                                                         if (flags)
494                                                                 enable_interrupts();
495                                                         return FALSE;
496                                                 }
497                                                 else {
498                                                         PRINTF(" trying to recalibrate Try %d\n",retriescal);
499                                                         if(fdc_recalibrate(pCMD,pFG)==FALSE) {
500                                                                 stop_fdc_drive(pCMD);
501                                                                 if (flags)
502                                                                         enable_interrupts();
503                                                                 return FALSE;
504                                                         }
505                                                         retriesrw=0;
506                                                         goto retrycal;
507                                                 } /* else >FDC_CAL_RETRIES */
508                                         }
509                                         else {
510                                                 PRINTF("Read retry %d\n",retriesrw);
511                                                 goto retryrw;
512                                         } /* else >FDC_RW_RETRIES */
513                                 }/* if output */
514                                 timeout--;
515                         }while(TRUE);
516                 } /* for len */
517                 /* the last sector of a track or all data has been read,
518                  * we need to get the results */
519                 fdc_terminate(pCMD);
520                 offset+=(sect_size*readblk); /* set up buffer pointer */
521                 bufferw = &buffer[offset];
522                 pCMD->blnr+=readblk; /* update current block nr */
523                 blocks-=readblk; /* update blocks */
524                 if(blocks==0)
525                         break; /* we are finish */
526                 /* setup new read blocks */
527                 /*      readblk=pFG->head*pFG->sect; */
528                 readblk=pFG->sect;
529                 if(readblk>blocks)
530                         readblk=blocks;
531 retrycal:
532                 /* a seek is necessary */
533                 if(fdc_seek(pCMD,pFG)==FALSE) {
534                         stop_fdc_drive(pCMD);
535                         if (flags)
536                                 enable_interrupts();
537                         return FALSE;
538                 }
539                 if((pCMD->result[STATUS_0]&0x20)!=0x20) {
540                         PRINTF("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
541                         stop_fdc_drive(pCMD);
542                         return FALSE;
543                 }
544         }while(TRUE); /* start over */
545         stop_fdc_drive(pCMD); /* switch off drive */
546         if (flags)
547                 enable_interrupts();
548         return TRUE;
551 /* Scan all drives and check if drive is present and disk is inserted */
552 int fdc_check_drive(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
554         int i,drives,state;
555   /* OK procedure of data book is satisfied.
556          * trying to get some information over the drives */
557         state=0; /* no drives, no disks */
558         for(drives=0;drives<4;drives++) {
559                 pCMD->drive=drives;
560                 select_fdc_drive(pCMD);
561                 pCMD->blnr=0; /* set to the 1st block */
562                 if(fdc_recalibrate(pCMD,pFG)==FALSE)
563                         continue;
564                 if((pCMD->result[STATUS_0]&0x10)==0x10)
565                         continue;
566                 /* ok drive connected check for disk */
567                 state|=(1<<drives);
568                 pCMD->blnr=pFG->size; /* set to the last block */
569                 if(fdc_seek(pCMD,pFG)==FALSE)
570                         continue;
571                 pCMD->blnr=0; /* set to the 1st block */
572                 if(fdc_recalibrate(pCMD,pFG)==FALSE)
573                         continue;
574                 pCMD->cmd[COMMAND]=FDC_CMD_READ_ID;
575                 if(fdc_issue_cmd(pCMD,pFG)==FALSE)
576                         continue;
577                 state|=(0x10<<drives);
578         }
579         stop_fdc_drive(pCMD);
580         for(i=0;i<4;i++) {
581                 PRINTF("Floppy Drive %d %sconnected %sDisk inserted %s\n",i,
582                         ((state&(1<<i))==(1<<i)) ? "":"not ",
583                         ((state&(0x10<<i))==(0x10<<i)) ? "":"no ",
584                         ((state&(0x10<<i))==(0x10<<i)) ? pFG->name : "");
585         }
586         pCMD->flags=state;
587         return TRUE;
591 /**************************************************************************
592 * int fdc_setup
593 * setup the fdc according the datasheet
594 * assuming in PS2 Mode
595 */
596 int fdc_setup(int drive, FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
598         int i;
600 #ifdef CONFIG_SYS_FDC_HW_INIT
601         fdc_hw_init ();
602 #endif
603         /* first, we reset the FDC via the DOR */
604         write_fdc_reg(FDC_DOR,0x00);
605         for(i=0; i<255; i++) /* then we wait some time */
606                 udelay(500);
607         /* then, we clear the reset in the DOR */
608         pCMD->drive=drive;
609         select_fdc_drive(pCMD);
610         /* initialize the CCR */
611         write_fdc_reg(FDC_CCR,pFG->rate);
612         /* then initialize the DSR */
613         write_fdc_reg(FDC_DSR,pFG->rate);
614         if(wait_for_fdc_int()==FALSE) {
615                         PRINTF("Time Out after writing CCR\n");
616                         return FALSE;
617         }
618         /* now issue sense Interrupt and status command
619          * assuming only one drive present (drive 0) */
620         pCMD->dma=0; /* we don't use any dma at all */
621         for(i=0;i<4;i++) {
622                 /* issue sense interrupt for all 4 possible drives */
623                 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
624                 if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
625                         PRINTF("Sense Interrupt for drive %d failed\n",i);
626                 }
627         }
628         /* issue the configure command */
629         pCMD->drive=drive;
630         select_fdc_drive(pCMD);
631         pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE;
632         if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
633                 PRINTF(" configure timeout\n");
634                 stop_fdc_drive(pCMD);
635                 return FALSE;
636         }
637         /* issue specify command */
638         pCMD->cmd[COMMAND]=FDC_CMD_SPECIFY;
639         if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
640                 PRINTF(" specify timeout\n");
641                 stop_fdc_drive(pCMD);
642                 return FALSE;
644         }
645         /* then, we clear the reset in the DOR */
646         /* fdc_check_drive(pCMD,pFG);   */
647         /*      write_fdc_reg(FDC_DOR,0x04); */
649         return TRUE;
652 #if defined(CONFIG_CMD_FDOS)
654 /* Low level functions for the Floppy-DOS layer                              */
656 /**************************************************************************
657 * int fdc_fdos_init
658 * initialize the FDC layer
660 */
661 int fdc_fdos_init (int drive)
663         FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
664         FDC_COMMAND_STRUCT *pCMD = &cmd;
666         /* setup FDC and scan for drives  */
667         if(fdc_setup(drive,pCMD,pFG)==FALSE) {
668                 printf("\n** Error in setup FDC **\n");
669                 return FALSE;
670         }
671         if(fdc_check_drive(pCMD,pFG)==FALSE) {
672                 printf("\n** Error in check_drives **\n");
673                 return FALSE;
674         }
675         if((pCMD->flags&(1<<drive))==0) {
676                 /* drive not available */
677                 printf("\n** Drive %d not available **\n",drive);
678                 return FALSE;
679         }
680         if((pCMD->flags&(0x10<<drive))==0) {
681                 /* no disk inserted */
682                 printf("\n** No disk inserted in drive %d **\n",drive);
683                 return FALSE;
684         }
685         /* ok, we have a valid source */
686         pCMD->drive=drive;
688         /* read first block */
689         pCMD->blnr=0;
690         return TRUE;
692 /**************************************************************************
693 * int fdc_fdos_seek
694 * parameter is a block number
695 */
696 int fdc_fdos_seek (int where)
698         FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
699         FDC_COMMAND_STRUCT *pCMD = &cmd;
701         pCMD -> blnr = where ;
702         return (fdc_seek (pCMD, pFG));
704 /**************************************************************************
705 * int fdc_fdos_read
706 *  the length is in block number
707 */
708 int fdc_fdos_read (void *buffer, int len)
710         FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
711         FDC_COMMAND_STRUCT *pCMD = &cmd;
713         return (fdc_read_data (buffer, len, pCMD, pFG));
715 #endif
717 #if defined(CONFIG_CMD_FDC)
718 /****************************************************************************
719  * main routine do_fdcboot
720  */
721 int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
723         FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
724         FDC_COMMAND_STRUCT *pCMD = &cmd;
725         unsigned long addr,imsize;
726         image_header_t *hdr;  /* used for fdc boot */
727         unsigned char boot_drive;
728         int i,nrofblk;
729 #if defined(CONFIG_FIT)
730         const void *fit_hdr = NULL;
731 #endif
733         switch (argc) {
734         case 1:
735                 addr = CONFIG_SYS_LOAD_ADDR;
736                 boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
737                 break;
738         case 2:
739                 addr = simple_strtoul(argv[1], NULL, 16);
740                 boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
741                 break;
742         case 3:
743                 addr = simple_strtoul(argv[1], NULL, 16);
744                 boot_drive=simple_strtoul(argv[2], NULL, 10);
745                 break;
746         default:
747                 return CMD_RET_USAGE;
748         }
749         /* setup FDC and scan for drives  */
750         if(fdc_setup(boot_drive,pCMD,pFG)==FALSE) {
751                 printf("\n** Error in setup FDC **\n");
752                 return 1;
753         }
754         if(fdc_check_drive(pCMD,pFG)==FALSE) {
755                 printf("\n** Error in check_drives **\n");
756                 return 1;
757         }
758         if((pCMD->flags&(1<<boot_drive))==0) {
759                 /* drive not available */
760                 printf("\n** Drive %d not availabe **\n",boot_drive);
761                 return 1;
762         }
763         if((pCMD->flags&(0x10<<boot_drive))==0) {
764                 /* no disk inserted */
765                 printf("\n** No disk inserted in drive %d **\n",boot_drive);
766                 return 1;
767         }
768         /* ok, we have a valid source */
769         pCMD->drive=boot_drive;
770         /* read first block */
771         pCMD->blnr=0;
772         if(fdc_read_data((unsigned char *)addr,1,pCMD,pFG)==FALSE) {
773                 printf("\nRead error:");
774                 for(i=0;i<7;i++)
775                         printf("result%d: 0x%02X\n",i,pCMD->result[i]);
776                 return 1;
777         }
779         switch (genimg_get_format ((void *)addr)) {
780         case IMAGE_FORMAT_LEGACY:
781                 hdr = (image_header_t *)addr;
782                 image_print_contents (hdr);
784                 imsize = image_get_image_size (hdr);
785                 break;
786 #if defined(CONFIG_FIT)
787         case IMAGE_FORMAT_FIT:
788                 fit_hdr = (const void *)addr;
789                 puts ("Fit image detected...\n");
791                 imsize = fit_get_size (fit_hdr);
792                 break;
793 #endif
794         default:
795                 puts ("** Unknown image type\n");
796                 return 1;
797         }
799         nrofblk=imsize/512;
800         if((imsize%512)>0)
801                 nrofblk++;
802         printf("Loading %ld Bytes (%d blocks) at 0x%08lx..\n",imsize,nrofblk,addr);
803         pCMD->blnr=0;
804         if(fdc_read_data((unsigned char *)addr,nrofblk,pCMD,pFG)==FALSE) {
805                 /* read image block */
806                 printf("\nRead error:");
807                 for(i=0;i<7;i++)
808                         printf("result%d: 0x%02X\n",i,pCMD->result[i]);
809                 return 1;
810         }
811         printf("OK %ld Bytes loaded.\n",imsize);
813         flush_cache (addr, imsize);
815 #if defined(CONFIG_FIT)
816         /* This cannot be done earlier, we need complete FIT image in RAM first */
817         if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
818                 if (!fit_check_format (fit_hdr)) {
819                         puts ("** Bad FIT image format\n");
820                         return 1;
821                 }
822                 fit_print_contents (fit_hdr);
823         }
824 #endif
826         /* Loading ok, update default load address */
827         load_addr = addr;
829         return bootm_maybe_autostart(cmdtp, argv[0]);
832 U_BOOT_CMD(
833         fdcboot,        3,      1,      do_fdcboot,
834         "boot from floppy device",
835         "loadAddr drive"
836 );
837 #endif