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 #include <irq_func.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 */
read_fdc_reg(unsigned int addr)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 */
write_fdc_reg(unsigned int addr,unsigned char val)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) */
wait_for_fdc_int(void)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 occurred */
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 */
read_fdc_byte(void)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 occurred */
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 */
fdc_need_more_output(void)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 */
write_fdc_byte(unsigned char val)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 occurred */
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
fdc_issue_cmd(FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)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 */
select_fdc_drive(FDC_COMMAND_STRUCT * pCMD)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 */
stop_fdc_drive(FDC_COMMAND_STRUCT * pCMD)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 */
fdc_recalibrate(FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)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 */
fdc_seek(FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)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 */
fdc_terminate(FDC_COMMAND_STRUCT * pCMD)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 occurred */
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 */
fdc_read_data(unsigned char * buffer,unsigned long blocks,FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)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 transferred: 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 */
fdc_check_drive(FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)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 */
fdc_setup(int drive,FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)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 */
do_fdcboot(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])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 #if defined(CONFIG_LEGACY_IMAGE_FORMAT)
639 image_header_t *hdr; /* used for fdc boot */
640 #endif
641 unsigned char boot_drive;
642 int i,nrofblk;
643 #if defined(CONFIG_FIT)
644 const void *fit_hdr = NULL;
645 #endif
646
647 switch (argc) {
648 case 1:
649 addr = CONFIG_SYS_LOAD_ADDR;
650 boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
651 break;
652 case 2:
653 addr = simple_strtoul(argv[1], NULL, 16);
654 boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
655 break;
656 case 3:
657 addr = simple_strtoul(argv[1], NULL, 16);
658 boot_drive=simple_strtoul(argv[2], NULL, 10);
659 break;
660 default:
661 return CMD_RET_USAGE;
662 }
663 /* setup FDC and scan for drives */
664 if (fdc_setup(boot_drive, pCMD, pFG) == false) {
665 printf("\n** Error in setup FDC **\n");
666 return 1;
667 }
668 if (fdc_check_drive(pCMD, pFG) == false) {
669 printf("\n** Error in check_drives **\n");
670 return 1;
671 }
672 if((pCMD->flags&(1<<boot_drive))==0) {
673 /* drive not available */
674 printf("\n** Drive %d not availabe **\n",boot_drive);
675 return 1;
676 }
677 if((pCMD->flags&(0x10<<boot_drive))==0) {
678 /* no disk inserted */
679 printf("\n** No disk inserted in drive %d **\n",boot_drive);
680 return 1;
681 }
682 /* ok, we have a valid source */
683 pCMD->drive=boot_drive;
684 /* read first block */
685 pCMD->blnr=0;
686 if (fdc_read_data((unsigned char *)addr, 1, pCMD, pFG) == false) {
687 printf("\nRead error:");
688 for(i=0;i<7;i++)
689 printf("result%d: 0x%02X\n",i,pCMD->result[i]);
690 return 1;
691 }
692
693 switch (genimg_get_format ((void *)addr)) {
694 #if defined(CONFIG_LEGACY_IMAGE_FORMAT)
695 case IMAGE_FORMAT_LEGACY:
696 hdr = (image_header_t *)addr;
697 image_print_contents (hdr);
698
699 imsize = image_get_image_size (hdr);
700 break;
701 #endif
702 #if defined(CONFIG_FIT)
703 case IMAGE_FORMAT_FIT:
704 fit_hdr = (const void *)addr;
705 puts ("Fit image detected...\n");
706
707 imsize = fit_get_size (fit_hdr);
708 break;
709 #endif
710 default:
711 puts ("** Unknown image type\n");
712 return 1;
713 }
714
715 nrofblk=imsize/512;
716 if((imsize%512)>0)
717 nrofblk++;
718 printf("Loading %ld Bytes (%d blocks) at 0x%08lx..\n",imsize,nrofblk,addr);
719 pCMD->blnr=0;
720 if (fdc_read_data((unsigned char *)addr, nrofblk, pCMD, pFG) == false) {
721 /* read image block */
722 printf("\nRead error:");
723 for(i=0;i<7;i++)
724 printf("result%d: 0x%02X\n",i,pCMD->result[i]);
725 return 1;
726 }
727 printf("OK %ld Bytes loaded.\n",imsize);
728
729 flush_cache (addr, imsize);
730
731 #if defined(CONFIG_FIT)
732 /* This cannot be done earlier, we need complete FIT image in RAM first */
733 if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
734 if (!fit_check_format (fit_hdr)) {
735 puts ("** Bad FIT image format\n");
736 return 1;
737 }
738 fit_print_contents (fit_hdr);
739 }
740 #endif
741
742 /* Loading ok, update default load address */
743 load_addr = addr;
744
745 return bootm_maybe_autostart(cmdtp, argv[0]);
746 }
747
748 U_BOOT_CMD(
749 fdcboot, 3, 1, do_fdcboot,
750 "boot from floppy device",
751 "loadAddr drive"
752 );
753