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