1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2001
4 * Denis Peter, MPL AG, d.peter@mpl.ch.
5 */
6 /*
7 * Floppy Disk support
8 */
9
10 #include <common.h>
11 #include <config.h>
12 #include <command.h>
13 #include <image.h>
14
15
16 #undef FDC_DEBUG
17
18 #ifdef FDC_DEBUG
19 #define PRINTF(fmt,args...) printf (fmt ,##args)
20 #else
21 #define PRINTF(fmt,args...)
22 #endif
23
24 /*#if defined(CONFIG_CMD_DATE) */
25 /*#include <rtc.h> */
26 /*#endif */
27
28 typedef struct {
29 int flags; /* connected drives ect */
30 unsigned long blnr; /* Logical block nr */
31 uchar drive; /* drive no */
32 uchar cmdlen; /* cmd length */
33 uchar cmd[16]; /* cmd desc */
34 uchar dma; /* if > 0 dma enabled */
35 uchar result[11]; /* status information */
36 uchar resultlen; /* lenght of result */
37 } FDC_COMMAND_STRUCT;
38
39 /* flags: only the lower 8bit used:
40 * bit 0 if set drive 0 is present
41 * bit 1 if set drive 1 is present
42 * bit 2 if set drive 2 is present
43 * bit 3 if set drive 3 is present
44 * bit 4 if set disk in drive 0 is inserted
45 * bit 5 if set disk in drive 1 is inserted
46 * bit 6 if set disk in drive 2 is inserted
47 * bit 7 if set disk in drive 4 is inserted
48 */
49
50 /* cmd indexes */
51 #define COMMAND 0
52 #define DRIVE 1
53 #define CONFIG0 1
54 #define SPEC_HUTSRT 1
55 #define TRACK 2
56 #define CONFIG1 2
57 #define SPEC_HLT 2
58 #define HEAD 3
59 #define CONFIG2 3
60 #define SECTOR 4
61 #define SECTOR_SIZE 5
62 #define LAST_TRACK 6
63 #define GAP 7
64 #define DTL 8
65 /* result indexes */
66 #define STATUS_0 0
67 #define STATUS_PCN 1
68 #define STATUS_1 1
69 #define STATUS_2 2
70 #define STATUS_TRACK 3
71 #define STATUS_HEAD 4
72 #define STATUS_SECT 5
73 #define STATUS_SECT_SIZE 6
74
75
76 /* Register addresses */
77 #define FDC_BASE 0x3F0
78 #define FDC_SRA FDC_BASE + 0 /* Status Register A */
79 #define FDC_SRB FDC_BASE + 1 /* Status Register B */
80 #define FDC_DOR FDC_BASE + 2 /* Digital Output Register */
81 #define FDC_TDR FDC_BASE + 3 /* Tape Drive Register */
82 #define FDC_DSR FDC_BASE + 4 /* Data rate Register */
83 #define FDC_MSR FDC_BASE + 4 /* Main Status Register */
84 #define FDC_FIFO FDC_BASE + 5 /* FIFO */
85 #define FDC_DIR FDC_BASE + 6 /* Digital Input Register */
86 #define FDC_CCR FDC_BASE + 7 /* Configuration Control */
87 /* Commands */
88 #define FDC_CMD_SENSE_INT 0x08
89 #define FDC_CMD_CONFIGURE 0x13
90 #define FDC_CMD_SPECIFY 0x03
91 #define FDC_CMD_RECALIBRATE 0x07
92 #define FDC_CMD_READ 0x06
93 #define FDC_CMD_READ_TRACK 0x02
94 #define FDC_CMD_READ_ID 0x0A
95 #define FDC_CMD_DUMP_REG 0x0E
96 #define FDC_CMD_SEEK 0x0F
97
98 #define FDC_CMD_SENSE_INT_LEN 0x01
99 #define FDC_CMD_CONFIGURE_LEN 0x04
100 #define FDC_CMD_SPECIFY_LEN 0x03
101 #define FDC_CMD_RECALIBRATE_LEN 0x02
102 #define FDC_CMD_READ_LEN 0x09
103 #define FDC_CMD_READ_TRACK_LEN 0x09
104 #define FDC_CMD_READ_ID_LEN 0x02
105 #define FDC_CMD_DUMP_REG_LEN 0x01
106 #define FDC_CMD_SEEK_LEN 0x03
107
108 #define FDC_FIFO_THR 0x0C
109 #define FDC_FIFO_DIS 0x00
110 #define FDC_IMPLIED_SEEK 0x01
111 #define FDC_POLL_DIS 0x00
112 #define FDC_PRE_TRK 0x00
113 #define FDC_CONFIGURE FDC_FIFO_THR | (FDC_POLL_DIS<<4) | (FDC_FIFO_DIS<<5) | (FDC_IMPLIED_SEEK << 6)
114 #define FDC_MFM_MODE 0x01 /* MFM enable */
115 #define FDC_SKIP_MODE 0x00 /* skip enable */
116
117 #define FDC_TIME_OUT 100000 /* time out */
118 #define FDC_RW_RETRIES 3 /* read write retries */
119 #define FDC_CAL_RETRIES 3 /* calibration and seek retries */
120
121
122 /* Disk structure */
123 typedef struct {
124 unsigned int size; /* nr of sectors total */
125 unsigned int sect; /* sectors per track */
126 unsigned int head; /* nr of heads */
127 unsigned int track; /* nr of tracks */
128 unsigned int stretch; /* !=0 means double track steps */
129 unsigned char gap; /* gap1 size */
130 unsigned char rate; /* data rate. |= 0x40 for perpendicular */
131 unsigned char spec1; /* stepping rate, head unload time */
132 unsigned char fmt_gap;/* gap2 size */
133 unsigned char hlt; /* head load time */
134 unsigned char sect_code;/* Sector Size code */
135 const char * name; /* used only for predefined formats */
136 } FD_GEO_STRUCT;
137
138
139 /* supported Floppy types (currently only one) */
140 const static FD_GEO_STRUCT floppy_type[2] = {
141 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,16,2,"H1440" }, /* 7 1.44MB 3.5" */
142 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00, 0,0,NULL }, /* end of table */
143 };
144
145 static FDC_COMMAND_STRUCT cmd; /* global command struct */
146
147 /* If the boot drive number is undefined, we assume it's drive 0 */
148 #ifndef CONFIG_SYS_FDC_DRIVE_NUMBER
149 #define CONFIG_SYS_FDC_DRIVE_NUMBER 0
150 #endif
151
152 /* Hardware access */
153 #ifndef CONFIG_SYS_ISA_IO_STRIDE
154 #define CONFIG_SYS_ISA_IO_STRIDE 1
155 #endif
156
157 #ifndef CONFIG_SYS_ISA_IO_OFFSET
158 #define CONFIG_SYS_ISA_IO_OFFSET 0
159 #endif
160
161 /* Supporting Functions */
162 /* reads a Register of the FDC */
read_fdc_reg(unsigned int addr)163 unsigned char read_fdc_reg(unsigned int addr)
164 {
165 volatile unsigned char *val =
166 (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
167 (addr * CONFIG_SYS_ISA_IO_STRIDE) +
168 CONFIG_SYS_ISA_IO_OFFSET);
169
170 return val [0];
171 }
172
173 /* writes a Register of the FDC */
write_fdc_reg(unsigned int addr,unsigned char val)174 void write_fdc_reg(unsigned int addr, unsigned char val)
175 {
176 volatile unsigned char *tmp =
177 (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
178 (addr * CONFIG_SYS_ISA_IO_STRIDE) +
179 CONFIG_SYS_ISA_IO_OFFSET);
180 tmp[0]=val;
181 }
182
183 /* waits for an interrupt (polling) */
wait_for_fdc_int(void)184 int wait_for_fdc_int(void)
185 {
186 unsigned long timeout;
187 timeout = FDC_TIME_OUT;
188 while((read_fdc_reg(FDC_SRA)&0x80)==0) {
189 timeout--;
190 udelay(10);
191 if(timeout==0) /* timeout occurred */
192 return false;
193 }
194 return true;
195 }
196
197 /* reads a byte from the FIFO of the FDC and checks direction and RQM bit
198 of the MSR. returns -1 if timeout, or byte if ok */
read_fdc_byte(void)199 int read_fdc_byte(void)
200 {
201 unsigned long timeout;
202 timeout = FDC_TIME_OUT;
203 while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
204 /* direction out and ready */
205 udelay(10);
206 timeout--;
207 if(timeout==0) /* timeout occurred */
208 return -1;
209 }
210 return read_fdc_reg(FDC_FIFO);
211 }
212
213 /* if the direction of the FIFO is wrong, this routine is used to
214 empty the FIFO. Should _not_ be used */
fdc_need_more_output(void)215 int fdc_need_more_output(void)
216 {
217 unsigned char c;
218 while((read_fdc_reg(FDC_MSR)&0xC0)==0xC0) {
219 c=(unsigned char)read_fdc_byte();
220 printf("Error: more output: %x\n",c);
221 }
222 return true;
223 }
224
225
226 /* writes a byte to the FIFO of the FDC and checks direction and RQM bit
227 of the MSR */
write_fdc_byte(unsigned char val)228 int write_fdc_byte(unsigned char val)
229 {
230 unsigned long timeout;
231 timeout = FDC_TIME_OUT;
232 while((read_fdc_reg(FDC_MSR)&0xC0)!=0x80) {
233 /* direction in and ready for byte */
234 timeout--;
235 udelay(10);
236 fdc_need_more_output();
237 if(timeout==0) /* timeout occurred */
238 return false;
239 }
240 write_fdc_reg(FDC_FIFO,val);
241 return true;
242 }
243
244 /* sets up all FDC commands and issues it to the FDC. If
245 the command causes direct results (no Execution Phase)
246 the result is be read as well. */
247
fdc_issue_cmd(FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)248 int fdc_issue_cmd(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
249 {
250 int i;
251 unsigned long head,track,sect,timeout;
252 track = pCMD->blnr / (pFG->sect * pFG->head); /* track nr */
253 sect = pCMD->blnr % (pFG->sect * pFG->head); /* remaining blocks */
254 head = sect / pFG->sect; /* head nr */
255 sect = sect % pFG->sect; /* remaining blocks */
256 sect++; /* sectors are 1 based */
257 PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",
258 pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr);
259
260 if(head|=0) { /* max heads = 2 */
261 pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */
262 pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
263 }
264 else {
265 pCMD->cmd[DRIVE]=pCMD->drive; /* head 0 */
266 pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
267 }
268 pCMD->cmd[TRACK]=(unsigned char) track; /* track */
269 switch (pCMD->cmd[COMMAND]) {
270 case FDC_CMD_READ:
271 pCMD->cmd[SECTOR]=(unsigned char) sect; /* sector */
272 pCMD->cmd[SECTOR_SIZE]=pFG->sect_code; /* sector size code */
273 pCMD->cmd[LAST_TRACK]=pFG->sect; /* End of track */
274 pCMD->cmd[GAP]=pFG->gap; /* gap */
275 pCMD->cmd[DTL]=0xFF; /* DTL */
276 pCMD->cmdlen=FDC_CMD_READ_LEN;
277 pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
278 pCMD->cmd[COMMAND]|=(FDC_SKIP_MODE<<5); /* set Skip bit */
279 pCMD->resultlen=0; /* result only after execution */
280 break;
281 case FDC_CMD_SEEK:
282 pCMD->cmdlen=FDC_CMD_SEEK_LEN;
283 pCMD->resultlen=0; /* no result */
284 break;
285 case FDC_CMD_CONFIGURE:
286 pCMD->cmd[CONFIG0]=0;
287 pCMD->cmd[CONFIG1]=FDC_CONFIGURE; /* FIFO Threshold, Poll, Enable FIFO */
288 pCMD->cmd[CONFIG2]=FDC_PRE_TRK; /* Precompensation Track */
289 pCMD->cmdlen=FDC_CMD_CONFIGURE_LEN;
290 pCMD->resultlen=0; /* no result */
291 break;
292 case FDC_CMD_SPECIFY:
293 pCMD->cmd[SPEC_HUTSRT]=pFG->spec1;
294 pCMD->cmd[SPEC_HLT]=(pFG->hlt)<<1; /* head load time */
295 if(pCMD->dma==0)
296 pCMD->cmd[SPEC_HLT]|=0x1; /* no dma */
297 pCMD->cmdlen=FDC_CMD_SPECIFY_LEN;
298 pCMD->resultlen=0; /* no result */
299 break;
300 case FDC_CMD_DUMP_REG:
301 pCMD->cmdlen=FDC_CMD_DUMP_REG_LEN;
302 pCMD->resultlen=10; /* 10 byte result */
303 break;
304 case FDC_CMD_READ_ID:
305 pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
306 pCMD->cmdlen=FDC_CMD_READ_ID_LEN;
307 pCMD->resultlen=7; /* 7 byte result */
308 break;
309 case FDC_CMD_RECALIBRATE:
310 pCMD->cmd[DRIVE]&=0x03; /* don't set the head bit */
311 pCMD->cmdlen=FDC_CMD_RECALIBRATE_LEN;
312 pCMD->resultlen=0; /* no result */
313 break;
314 break;
315 case FDC_CMD_SENSE_INT:
316 pCMD->cmdlen=FDC_CMD_SENSE_INT_LEN;
317 pCMD->resultlen=2;
318 break;
319 }
320 for(i=0;i<pCMD->cmdlen;i++) {
321 /* PRINTF("write cmd%d = 0x%02X\n",i,pCMD->cmd[i]); */
322 if (write_fdc_byte(pCMD->cmd[i]) == false) {
323 PRINTF("Error: timeout while issue cmd%d\n",i);
324 return false;
325 }
326 }
327 timeout=FDC_TIME_OUT;
328 for(i=0;i<pCMD->resultlen;i++) {
329 while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
330 timeout--;
331 if(timeout==0) {
332 PRINTF(" timeout while reading result%d MSR=0x%02X\n",i,read_fdc_reg(FDC_MSR));
333 return false;
334 }
335 }
336 pCMD->result[i]=(unsigned char)read_fdc_byte();
337 }
338 return true;
339 }
340
341 /* selects the drive assigned in the cmd structur and
342 switches on the Motor */
select_fdc_drive(FDC_COMMAND_STRUCT * pCMD)343 void select_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
344 {
345 unsigned char val;
346
347 val=(1<<(4+pCMD->drive))|pCMD->drive|0xC; /* set reset, dma gate and motor bits */
348 if((read_fdc_reg(FDC_DOR)&val)!=val) {
349 write_fdc_reg(FDC_DOR,val);
350 for(val=0;val<255;val++)
351 udelay(500); /* wait some time to start motor */
352 }
353 }
354
355 /* switches off the Motor of the specified drive */
stop_fdc_drive(FDC_COMMAND_STRUCT * pCMD)356 void stop_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
357 {
358 unsigned char val;
359
360 val=(1<<(4+pCMD->drive))|pCMD->drive; /* sets motor bits */
361 write_fdc_reg(FDC_DOR,(read_fdc_reg(FDC_DOR)&~val));
362 }
363
364 /* issues a recalibrate command, waits for interrupt and
365 * issues a sense_interrupt */
fdc_recalibrate(FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)366 int fdc_recalibrate(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
367 {
368 pCMD->cmd[COMMAND]=FDC_CMD_RECALIBRATE;
369 if (fdc_issue_cmd(pCMD, pFG) == false)
370 return false;
371 while (wait_for_fdc_int() != true);
372
373 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
374 return(fdc_issue_cmd(pCMD,pFG));
375 }
376
377 /* issues a recalibrate command, waits for interrupt and
378 * issues a sense_interrupt */
fdc_seek(FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)379 int fdc_seek(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
380 {
381 pCMD->cmd[COMMAND]=FDC_CMD_SEEK;
382 if (fdc_issue_cmd(pCMD, pFG) == false)
383 return false;
384 while (wait_for_fdc_int() != true);
385
386 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
387 return(fdc_issue_cmd(pCMD,pFG));
388 }
389
390 /* terminates current command, by not servicing the FIFO
391 * waits for interrupt and fills in the result bytes */
fdc_terminate(FDC_COMMAND_STRUCT * pCMD)392 int fdc_terminate(FDC_COMMAND_STRUCT *pCMD)
393 {
394 int i;
395 for(i=0;i<100;i++)
396 udelay(500); /* wait 500usec for fifo overrun */
397 while((read_fdc_reg(FDC_SRA)&0x80)==0x00); /* wait as long as no int has occurred */
398 for(i=0;i<7;i++) {
399 pCMD->result[i]=(unsigned char)read_fdc_byte();
400 }
401 return true;
402 }
403
404 /* reads data from FDC, seek commands are issued automatic */
fdc_read_data(unsigned char * buffer,unsigned long blocks,FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)405 int fdc_read_data(unsigned char *buffer, unsigned long blocks,FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
406 {
407 /* first seek to start address */
408 unsigned long len,readblk,i,timeout,ii,offset;
409 unsigned char c,retriesrw,retriescal;
410 unsigned char *bufferw; /* working buffer */
411 int sect_size;
412 int flags;
413
414 flags=disable_interrupts(); /* switch off all Interrupts */
415 select_fdc_drive(pCMD); /* switch on drive */
416 sect_size=0x080<<pFG->sect_code;
417 retriesrw=0;
418 retriescal=0;
419 offset=0;
420 if (fdc_seek(pCMD, pFG) == false) {
421 stop_fdc_drive(pCMD);
422 if (flags)
423 enable_interrupts();
424 return false;
425 }
426 if((pCMD->result[STATUS_0]&0x20)!=0x20) {
427 printf("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
428 stop_fdc_drive(pCMD);
429 if (flags)
430 enable_interrupts();
431 return false;
432 }
433 /* now determine the next seek point */
434 /* lastblk=pCMD->blnr + blocks; */
435 /* readblk=(pFG->head*pFG->sect)-(pCMD->blnr%(pFG->head*pFG->sect)); */
436 readblk=pFG->sect-(pCMD->blnr%pFG->sect);
437 PRINTF("1st nr of block possible read %ld start %ld\n",readblk,pCMD->blnr);
438 if(readblk>blocks) /* is end within 1st track */
439 readblk=blocks; /* yes, correct it */
440 PRINTF("we read %ld blocks start %ld\n",readblk,pCMD->blnr);
441 bufferw = &buffer[0]; /* setup working buffer */
442 do {
443 retryrw:
444 len=sect_size * readblk;
445 pCMD->cmd[COMMAND]=FDC_CMD_READ;
446 if (fdc_issue_cmd(pCMD, pFG) == false) {
447 stop_fdc_drive(pCMD);
448 if (flags)
449 enable_interrupts();
450 return false;
451 }
452 for (i=0;i<len;i++) {
453 timeout=FDC_TIME_OUT;
454 do {
455 c=read_fdc_reg(FDC_MSR);
456 if((c&0xC0)==0xC0) {
457 bufferw[i]=read_fdc_reg(FDC_FIFO);
458 break;
459 }
460 if((c&0xC0)==0x80) { /* output */
461 PRINTF("Transfer error transferred: at %ld, MSR=%02X\n",i,c);
462 if(i>6) {
463 for(ii=0;ii<7;ii++) {
464 pCMD->result[ii]=bufferw[(i-7+ii)];
465 } /* for */
466 }
467 if(retriesrw++>FDC_RW_RETRIES) {
468 if (retriescal++>FDC_CAL_RETRIES) {
469 stop_fdc_drive(pCMD);
470 if (flags)
471 enable_interrupts();
472 return false;
473 }
474 else {
475 PRINTF(" trying to recalibrate Try %d\n",retriescal);
476 if (fdc_recalibrate(pCMD, pFG) == false) {
477 stop_fdc_drive(pCMD);
478 if (flags)
479 enable_interrupts();
480 return false;
481 }
482 retriesrw=0;
483 goto retrycal;
484 } /* else >FDC_CAL_RETRIES */
485 }
486 else {
487 PRINTF("Read retry %d\n",retriesrw);
488 goto retryrw;
489 } /* else >FDC_RW_RETRIES */
490 }/* if output */
491 timeout--;
492 } while (true);
493 } /* for len */
494 /* the last sector of a track or all data has been read,
495 * we need to get the results */
496 fdc_terminate(pCMD);
497 offset+=(sect_size*readblk); /* set up buffer pointer */
498 bufferw = &buffer[offset];
499 pCMD->blnr+=readblk; /* update current block nr */
500 blocks-=readblk; /* update blocks */
501 if(blocks==0)
502 break; /* we are finish */
503 /* setup new read blocks */
504 /* readblk=pFG->head*pFG->sect; */
505 readblk=pFG->sect;
506 if(readblk>blocks)
507 readblk=blocks;
508 retrycal:
509 /* a seek is necessary */
510 if (fdc_seek(pCMD, pFG) == false) {
511 stop_fdc_drive(pCMD);
512 if (flags)
513 enable_interrupts();
514 return false;
515 }
516 if((pCMD->result[STATUS_0]&0x20)!=0x20) {
517 PRINTF("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
518 stop_fdc_drive(pCMD);
519 return false;
520 }
521 } while (true); /* start over */
522 stop_fdc_drive(pCMD); /* switch off drive */
523 if (flags)
524 enable_interrupts();
525 return true;
526 }
527
528 /* Scan all drives and check if drive is present and disk is inserted */
fdc_check_drive(FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)529 int fdc_check_drive(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
530 {
531 int i,drives,state;
532 /* OK procedure of data book is satisfied.
533 * trying to get some information over the drives */
534 state=0; /* no drives, no disks */
535 for(drives=0;drives<4;drives++) {
536 pCMD->drive=drives;
537 select_fdc_drive(pCMD);
538 pCMD->blnr=0; /* set to the 1st block */
539 if (fdc_recalibrate(pCMD, pFG) == false)
540 continue;
541 if((pCMD->result[STATUS_0]&0x10)==0x10)
542 continue;
543 /* ok drive connected check for disk */
544 state|=(1<<drives);
545 pCMD->blnr=pFG->size; /* set to the last block */
546 if (fdc_seek(pCMD, pFG) == false)
547 continue;
548 pCMD->blnr=0; /* set to the 1st block */
549 if (fdc_recalibrate(pCMD, pFG) == false)
550 continue;
551 pCMD->cmd[COMMAND]=FDC_CMD_READ_ID;
552 if (fdc_issue_cmd(pCMD, pFG) == false)
553 continue;
554 state|=(0x10<<drives);
555 }
556 stop_fdc_drive(pCMD);
557 for(i=0;i<4;i++) {
558 PRINTF("Floppy Drive %d %sconnected %sDisk inserted %s\n",i,
559 ((state&(1<<i))==(1<<i)) ? "":"not ",
560 ((state&(0x10<<i))==(0x10<<i)) ? "":"no ",
561 ((state&(0x10<<i))==(0x10<<i)) ? pFG->name : "");
562 }
563 pCMD->flags=state;
564 return true;
565 }
566
567
568 /**************************************************************************
569 * int fdc_setup
570 * setup the fdc according the datasheet
571 * assuming in PS2 Mode
572 */
fdc_setup(int drive,FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)573 int fdc_setup(int drive, FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
574 {
575 int i;
576
577 #ifdef CONFIG_SYS_FDC_HW_INIT
578 fdc_hw_init ();
579 #endif
580 /* first, we reset the FDC via the DOR */
581 write_fdc_reg(FDC_DOR,0x00);
582 for(i=0; i<255; i++) /* then we wait some time */
583 udelay(500);
584 /* then, we clear the reset in the DOR */
585 pCMD->drive=drive;
586 select_fdc_drive(pCMD);
587 /* initialize the CCR */
588 write_fdc_reg(FDC_CCR,pFG->rate);
589 /* then initialize the DSR */
590 write_fdc_reg(FDC_DSR,pFG->rate);
591 if (wait_for_fdc_int() == false) {
592 PRINTF("Time Out after writing CCR\n");
593 return false;
594 }
595 /* now issue sense Interrupt and status command
596 * assuming only one drive present (drive 0) */
597 pCMD->dma=0; /* we don't use any dma at all */
598 for(i=0;i<4;i++) {
599 /* issue sense interrupt for all 4 possible drives */
600 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
601 if (fdc_issue_cmd(pCMD, pFG) == false) {
602 PRINTF("Sense Interrupt for drive %d failed\n",i);
603 }
604 }
605 /* issue the configure command */
606 pCMD->drive=drive;
607 select_fdc_drive(pCMD);
608 pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE;
609 if (fdc_issue_cmd(pCMD, pFG) == false) {
610 PRINTF(" configure timeout\n");
611 stop_fdc_drive(pCMD);
612 return false;
613 }
614 /* issue specify command */
615 pCMD->cmd[COMMAND]=FDC_CMD_SPECIFY;
616 if (fdc_issue_cmd(pCMD, pFG) == false) {
617 PRINTF(" specify timeout\n");
618 stop_fdc_drive(pCMD);
619 return false;
620
621 }
622 /* then, we clear the reset in the DOR */
623 /* fdc_check_drive(pCMD,pFG); */
624 /* write_fdc_reg(FDC_DOR,0x04); */
625
626 return true;
627 }
628
629 /****************************************************************************
630 * main routine do_fdcboot
631 */
do_fdcboot(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])632 int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
633 {
634 FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
635 FDC_COMMAND_STRUCT *pCMD = &cmd;
636 unsigned long addr,imsize;
637 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
638 image_header_t *hdr; /* used for fdc boot */
639 #endif
640 unsigned char boot_drive;
641 int i,nrofblk;
642 #if defined(CONFIG_FIT)
643 const void *fit_hdr = NULL;
644 #endif
645
646 switch (argc) {
647 case 1:
648 addr = CONFIG_SYS_LOAD_ADDR;
649 boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
650 break;
651 case 2:
652 addr = simple_strtoul(argv[1], NULL, 16);
653 boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
654 break;
655 case 3:
656 addr = simple_strtoul(argv[1], NULL, 16);
657 boot_drive=simple_strtoul(argv[2], NULL, 10);
658 break;
659 default:
660 return CMD_RET_USAGE;
661 }
662 /* setup FDC and scan for drives */
663 if (fdc_setup(boot_drive, pCMD, pFG) == false) {
664 printf("\n** Error in setup FDC **\n");
665 return 1;
666 }
667 if (fdc_check_drive(pCMD, pFG) == false) {
668 printf("\n** Error in check_drives **\n");
669 return 1;
670 }
671 if((pCMD->flags&(1<<boot_drive))==0) {
672 /* drive not available */
673 printf("\n** Drive %d not availabe **\n",boot_drive);
674 return 1;
675 }
676 if((pCMD->flags&(0x10<<boot_drive))==0) {
677 /* no disk inserted */
678 printf("\n** No disk inserted in drive %d **\n",boot_drive);
679 return 1;
680 }
681 /* ok, we have a valid source */
682 pCMD->drive=boot_drive;
683 /* read first block */
684 pCMD->blnr=0;
685 if (fdc_read_data((unsigned char *)addr, 1, pCMD, pFG) == false) {
686 printf("\nRead error:");
687 for(i=0;i<7;i++)
688 printf("result%d: 0x%02X\n",i,pCMD->result[i]);
689 return 1;
690 }
691
692 switch (genimg_get_format ((void *)addr)) {
693 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
694 case IMAGE_FORMAT_LEGACY:
695 hdr = (image_header_t *)addr;
696 image_print_contents (hdr);
697
698 imsize = image_get_image_size (hdr);
699 break;
700 #endif
701 #if defined(CONFIG_FIT)
702 case IMAGE_FORMAT_FIT:
703 fit_hdr = (const void *)addr;
704 puts ("Fit image detected...\n");
705
706 imsize = fit_get_size (fit_hdr);
707 break;
708 #endif
709 default:
710 puts ("** Unknown image type\n");
711 return 1;
712 }
713
714 nrofblk=imsize/512;
715 if((imsize%512)>0)
716 nrofblk++;
717 printf("Loading %ld Bytes (%d blocks) at 0x%08lx..\n",imsize,nrofblk,addr);
718 pCMD->blnr=0;
719 if (fdc_read_data((unsigned char *)addr, nrofblk, pCMD, pFG) == false) {
720 /* read image block */
721 printf("\nRead error:");
722 for(i=0;i<7;i++)
723 printf("result%d: 0x%02X\n",i,pCMD->result[i]);
724 return 1;
725 }
726 printf("OK %ld Bytes loaded.\n",imsize);
727
728 flush_cache (addr, imsize);
729
730 #if defined(CONFIG_FIT)
731 /* This cannot be done earlier, we need complete FIT image in RAM first */
732 if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
733 if (!fit_check_format (fit_hdr)) {
734 puts ("** Bad FIT image format\n");
735 return 1;
736 }
737 fit_print_contents (fit_hdr);
738 }
739 #endif
740
741 /* Loading ok, update default load address */
742 load_addr = addr;
743
744 return bootm_maybe_autostart(cmdtp, argv[0]);
745 }
746
747 U_BOOT_CMD(
748 fdcboot, 3, 1, do_fdcboot,
749 "boot from floppy device",
750 "loadAddr drive"
751 );
752