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Merge branch 'master' of git://www.denx.de/git/u-boot-cfi-flash
[people/ms/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 */
27
28 #include <common.h>
29 #include <config.h>
30 #include <command.h>
31 #include <image.h>
32
33
34 #undef FDC_DEBUG
35
36 #ifdef FDC_DEBUG
37 #define PRINTF(fmt,args...) printf (fmt ,##args)
38 #else
39 #define PRINTF(fmt,args...)
40 #endif
41
42 /*#if defined(CONFIG_CMD_DATE) */
43 /*#include <rtc.h> */
44 /*#endif */
45
46 typedef struct {
47 int flags; /* connected drives ect */
48 unsigned long blnr; /* Logical block nr */
49 uchar drive; /* drive no */
50 uchar cmdlen; /* cmd length */
51 uchar cmd[16]; /* cmd desc */
52 uchar dma; /* if > 0 dma enabled */
53 uchar result[11]; /* status information */
54 uchar resultlen; /* lenght of result */
55 } FDC_COMMAND_STRUCT;
56
57 /* flags: only the lower 8bit used:
58 * bit 0 if set drive 0 is present
59 * bit 1 if set drive 1 is present
60 * bit 2 if set drive 2 is present
61 * bit 3 if set drive 3 is present
62 * bit 4 if set disk in drive 0 is inserted
63 * bit 5 if set disk in drive 1 is inserted
64 * bit 6 if set disk in drive 2 is inserted
65 * bit 7 if set disk in drive 4 is inserted
66 */
67
68 /* cmd indexes */
69 #define COMMAND 0
70 #define DRIVE 1
71 #define CONFIG0 1
72 #define SPEC_HUTSRT 1
73 #define TRACK 2
74 #define CONFIG1 2
75 #define SPEC_HLT 2
76 #define HEAD 3
77 #define CONFIG2 3
78 #define SECTOR 4
79 #define SECTOR_SIZE 5
80 #define LAST_TRACK 6
81 #define GAP 7
82 #define DTL 8
83 /* result indexes */
84 #define STATUS_0 0
85 #define STATUS_PCN 1
86 #define STATUS_1 1
87 #define STATUS_2 2
88 #define STATUS_TRACK 3
89 #define STATUS_HEAD 4
90 #define STATUS_SECT 5
91 #define STATUS_SECT_SIZE 6
92
93
94 /* Register addresses */
95 #define FDC_BASE 0x3F0
96 #define FDC_SRA FDC_BASE + 0 /* Status Register A */
97 #define FDC_SRB FDC_BASE + 1 /* Status Register B */
98 #define FDC_DOR FDC_BASE + 2 /* Digital Output Register */
99 #define FDC_TDR FDC_BASE + 3 /* Tape Drive Register */
100 #define FDC_DSR FDC_BASE + 4 /* Data rate Register */
101 #define FDC_MSR FDC_BASE + 4 /* Main Status Register */
102 #define FDC_FIFO FDC_BASE + 5 /* FIFO */
103 #define FDC_DIR FDC_BASE + 6 /* Digital Input Register */
104 #define FDC_CCR FDC_BASE + 7 /* Configuration Control */
105 /* Commands */
106 #define FDC_CMD_SENSE_INT 0x08
107 #define FDC_CMD_CONFIGURE 0x13
108 #define FDC_CMD_SPECIFY 0x03
109 #define FDC_CMD_RECALIBRATE 0x07
110 #define FDC_CMD_READ 0x06
111 #define FDC_CMD_READ_TRACK 0x02
112 #define FDC_CMD_READ_ID 0x0A
113 #define FDC_CMD_DUMP_REG 0x0E
114 #define FDC_CMD_SEEK 0x0F
115
116 #define FDC_CMD_SENSE_INT_LEN 0x01
117 #define FDC_CMD_CONFIGURE_LEN 0x04
118 #define FDC_CMD_SPECIFY_LEN 0x03
119 #define FDC_CMD_RECALIBRATE_LEN 0x02
120 #define FDC_CMD_READ_LEN 0x09
121 #define FDC_CMD_READ_TRACK_LEN 0x09
122 #define FDC_CMD_READ_ID_LEN 0x02
123 #define FDC_CMD_DUMP_REG_LEN 0x01
124 #define FDC_CMD_SEEK_LEN 0x03
125
126 #define FDC_FIFO_THR 0x0C
127 #define FDC_FIFO_DIS 0x00
128 #define FDC_IMPLIED_SEEK 0x01
129 #define FDC_POLL_DIS 0x00
130 #define FDC_PRE_TRK 0x00
131 #define FDC_CONFIGURE FDC_FIFO_THR | (FDC_POLL_DIS<<4) | (FDC_FIFO_DIS<<5) | (FDC_IMPLIED_SEEK << 6)
132 #define FDC_MFM_MODE 0x01 /* MFM enable */
133 #define FDC_SKIP_MODE 0x00 /* skip enable */
134
135 #define FDC_TIME_OUT 100000 /* time out */
136 #define FDC_RW_RETRIES 3 /* read write retries */
137 #define FDC_CAL_RETRIES 3 /* calibration and seek retries */
138
139
140 /* Disk structure */
141 typedef struct {
142 unsigned int size; /* nr of sectors total */
143 unsigned int sect; /* sectors per track */
144 unsigned int head; /* nr of heads */
145 unsigned int track; /* nr of tracks */
146 unsigned int stretch; /* !=0 means double track steps */
147 unsigned char gap; /* gap1 size */
148 unsigned char rate; /* data rate. |= 0x40 for perpendicular */
149 unsigned char spec1; /* stepping rate, head unload time */
150 unsigned char fmt_gap;/* gap2 size */
151 unsigned char hlt; /* head load time */
152 unsigned char sect_code;/* Sector Size code */
153 const char * name; /* used only for predefined formats */
154 } FD_GEO_STRUCT;
155
156
157 /* supported Floppy types (currently only one) */
158 const static FD_GEO_STRUCT floppy_type[2] = {
159 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,16,2,"H1440" }, /* 7 1.44MB 3.5" */
160 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00, 0,0,NULL }, /* end of table */
161 };
162
163 static FDC_COMMAND_STRUCT cmd; /* global command struct */
164
165 /* If the boot drive number is undefined, we assume it's drive 0 */
166 #ifndef CONFIG_SYS_FDC_DRIVE_NUMBER
167 #define CONFIG_SYS_FDC_DRIVE_NUMBER 0
168 #endif
169
170 /* Hardware access */
171 #ifndef CONFIG_SYS_ISA_IO_STRIDE
172 #define CONFIG_SYS_ISA_IO_STRIDE 1
173 #endif
174
175 #ifndef CONFIG_SYS_ISA_IO_OFFSET
176 #define CONFIG_SYS_ISA_IO_OFFSET 0
177 #endif
178
179 /* Supporting Functions */
180 /* reads a Register of the FDC */
181 unsigned char read_fdc_reg(unsigned int addr)
182 {
183 volatile unsigned char *val =
184 (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
185 (addr * CONFIG_SYS_ISA_IO_STRIDE) +
186 CONFIG_SYS_ISA_IO_OFFSET);
187
188 return val [0];
189 }
190
191 /* writes a Register of the FDC */
192 void write_fdc_reg(unsigned int addr, unsigned char val)
193 {
194 volatile unsigned char *tmp =
195 (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
196 (addr * CONFIG_SYS_ISA_IO_STRIDE) +
197 CONFIG_SYS_ISA_IO_OFFSET);
198 tmp[0]=val;
199 }
200
201 /* waits for an interrupt (polling) */
202 int wait_for_fdc_int(void)
203 {
204 unsigned long timeout;
205 timeout = FDC_TIME_OUT;
206 while((read_fdc_reg(FDC_SRA)&0x80)==0) {
207 timeout--;
208 udelay(10);
209 if(timeout==0) /* timeout occured */
210 return false;
211 }
212 return true;
213 }
214
215 /* reads a byte from the FIFO of the FDC and checks direction and RQM bit
216 of the MSR. returns -1 if timeout, or byte if ok */
217 int read_fdc_byte(void)
218 {
219 unsigned long timeout;
220 timeout = FDC_TIME_OUT;
221 while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
222 /* direction out and ready */
223 udelay(10);
224 timeout--;
225 if(timeout==0) /* timeout occured */
226 return -1;
227 }
228 return read_fdc_reg(FDC_FIFO);
229 }
230
231 /* if the direction of the FIFO is wrong, this routine is used to
232 empty the FIFO. Should _not_ be used */
233 int fdc_need_more_output(void)
234 {
235 unsigned char c;
236 while((read_fdc_reg(FDC_MSR)&0xC0)==0xC0) {
237 c=(unsigned char)read_fdc_byte();
238 printf("Error: more output: %x\n",c);
239 }
240 return true;
241 }
242
243
244 /* writes a byte to the FIFO of the FDC and checks direction and RQM bit
245 of the MSR */
246 int write_fdc_byte(unsigned char val)
247 {
248 unsigned long timeout;
249 timeout = FDC_TIME_OUT;
250 while((read_fdc_reg(FDC_MSR)&0xC0)!=0x80) {
251 /* direction in and ready for byte */
252 timeout--;
253 udelay(10);
254 fdc_need_more_output();
255 if(timeout==0) /* timeout occured */
256 return false;
257 }
258 write_fdc_reg(FDC_FIFO,val);
259 return true;
260 }
261
262 /* sets up all FDC commands and issues it to the FDC. If
263 the command causes direct results (no Execution Phase)
264 the result is be read as well. */
265
266 int fdc_issue_cmd(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
267 {
268 int i;
269 unsigned long head,track,sect,timeout;
270 track = pCMD->blnr / (pFG->sect * pFG->head); /* track nr */
271 sect = pCMD->blnr % (pFG->sect * pFG->head); /* remaining blocks */
272 head = sect / pFG->sect; /* head nr */
273 sect = sect % pFG->sect; /* remaining blocks */
274 sect++; /* sectors are 1 based */
275 PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",
276 pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr);
277
278 if(head|=0) { /* max heads = 2 */
279 pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */
280 pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
281 }
282 else {
283 pCMD->cmd[DRIVE]=pCMD->drive; /* head 0 */
284 pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
285 }
286 pCMD->cmd[TRACK]=(unsigned char) track; /* track */
287 switch (pCMD->cmd[COMMAND]) {
288 case FDC_CMD_READ:
289 pCMD->cmd[SECTOR]=(unsigned char) sect; /* sector */
290 pCMD->cmd[SECTOR_SIZE]=pFG->sect_code; /* sector size code */
291 pCMD->cmd[LAST_TRACK]=pFG->sect; /* End of track */
292 pCMD->cmd[GAP]=pFG->gap; /* gap */
293 pCMD->cmd[DTL]=0xFF; /* DTL */
294 pCMD->cmdlen=FDC_CMD_READ_LEN;
295 pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
296 pCMD->cmd[COMMAND]|=(FDC_SKIP_MODE<<5); /* set Skip bit */
297 pCMD->resultlen=0; /* result only after execution */
298 break;
299 case FDC_CMD_SEEK:
300 pCMD->cmdlen=FDC_CMD_SEEK_LEN;
301 pCMD->resultlen=0; /* no result */
302 break;
303 case FDC_CMD_CONFIGURE:
304 pCMD->cmd[CONFIG0]=0;
305 pCMD->cmd[CONFIG1]=FDC_CONFIGURE; /* FIFO Threshold, Poll, Enable FIFO */
306 pCMD->cmd[CONFIG2]=FDC_PRE_TRK; /* Precompensation Track */
307 pCMD->cmdlen=FDC_CMD_CONFIGURE_LEN;
308 pCMD->resultlen=0; /* no result */
309 break;
310 case FDC_CMD_SPECIFY:
311 pCMD->cmd[SPEC_HUTSRT]=pFG->spec1;
312 pCMD->cmd[SPEC_HLT]=(pFG->hlt)<<1; /* head load time */
313 if(pCMD->dma==0)
314 pCMD->cmd[SPEC_HLT]|=0x1; /* no dma */
315 pCMD->cmdlen=FDC_CMD_SPECIFY_LEN;
316 pCMD->resultlen=0; /* no result */
317 break;
318 case FDC_CMD_DUMP_REG:
319 pCMD->cmdlen=FDC_CMD_DUMP_REG_LEN;
320 pCMD->resultlen=10; /* 10 byte result */
321 break;
322 case FDC_CMD_READ_ID:
323 pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
324 pCMD->cmdlen=FDC_CMD_READ_ID_LEN;
325 pCMD->resultlen=7; /* 7 byte result */
326 break;
327 case FDC_CMD_RECALIBRATE:
328 pCMD->cmd[DRIVE]&=0x03; /* don't set the head bit */
329 pCMD->cmdlen=FDC_CMD_RECALIBRATE_LEN;
330 pCMD->resultlen=0; /* no result */
331 break;
332 break;
333 case FDC_CMD_SENSE_INT:
334 pCMD->cmdlen=FDC_CMD_SENSE_INT_LEN;
335 pCMD->resultlen=2;
336 break;
337 }
338 for(i=0;i<pCMD->cmdlen;i++) {
339 /* PRINTF("write cmd%d = 0x%02X\n",i,pCMD->cmd[i]); */
340 if (write_fdc_byte(pCMD->cmd[i]) == false) {
341 PRINTF("Error: timeout while issue cmd%d\n",i);
342 return false;
343 }
344 }
345 timeout=FDC_TIME_OUT;
346 for(i=0;i<pCMD->resultlen;i++) {
347 while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
348 timeout--;
349 if(timeout==0) {
350 PRINTF(" timeout while reading result%d MSR=0x%02X\n",i,read_fdc_reg(FDC_MSR));
351 return false;
352 }
353 }
354 pCMD->result[i]=(unsigned char)read_fdc_byte();
355 }
356 return true;
357 }
358
359 /* selects the drive assigned in the cmd structur and
360 switches on the Motor */
361 void select_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
362 {
363 unsigned char val;
364
365 val=(1<<(4+pCMD->drive))|pCMD->drive|0xC; /* set reset, dma gate and motor bits */
366 if((read_fdc_reg(FDC_DOR)&val)!=val) {
367 write_fdc_reg(FDC_DOR,val);
368 for(val=0;val<255;val++)
369 udelay(500); /* wait some time to start motor */
370 }
371 }
372
373 /* switches off the Motor of the specified drive */
374 void stop_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
375 {
376 unsigned char val;
377
378 val=(1<<(4+pCMD->drive))|pCMD->drive; /* sets motor bits */
379 write_fdc_reg(FDC_DOR,(read_fdc_reg(FDC_DOR)&~val));
380 }
381
382 /* issues a recalibrate command, waits for interrupt and
383 * issues a sense_interrupt */
384 int fdc_recalibrate(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
385 {
386 pCMD->cmd[COMMAND]=FDC_CMD_RECALIBRATE;
387 if (fdc_issue_cmd(pCMD, pFG) == false)
388 return false;
389 while (wait_for_fdc_int() != true);
390
391 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
392 return(fdc_issue_cmd(pCMD,pFG));
393 }
394
395 /* issues a recalibrate command, waits for interrupt and
396 * issues a sense_interrupt */
397 int fdc_seek(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
398 {
399 pCMD->cmd[COMMAND]=FDC_CMD_SEEK;
400 if (fdc_issue_cmd(pCMD, pFG) == false)
401 return false;
402 while (wait_for_fdc_int() != true);
403
404 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
405 return(fdc_issue_cmd(pCMD,pFG));
406 }
407
408 /* terminates current command, by not servicing the FIFO
409 * waits for interrupt and fills in the result bytes */
410 int fdc_terminate(FDC_COMMAND_STRUCT *pCMD)
411 {
412 int i;
413 for(i=0;i<100;i++)
414 udelay(500); /* wait 500usec for fifo overrun */
415 while((read_fdc_reg(FDC_SRA)&0x80)==0x00); /* wait as long as no int has occured */
416 for(i=0;i<7;i++) {
417 pCMD->result[i]=(unsigned char)read_fdc_byte();
418 }
419 return true;
420 }
421
422 /* reads data from FDC, seek commands are issued automatic */
423 int fdc_read_data(unsigned char *buffer, unsigned long blocks,FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
424 {
425 /* first seek to start address */
426 unsigned long len,readblk,i,timeout,ii,offset;
427 unsigned char c,retriesrw,retriescal;
428 unsigned char *bufferw; /* working buffer */
429 int sect_size;
430 int flags;
431
432 flags=disable_interrupts(); /* switch off all Interrupts */
433 select_fdc_drive(pCMD); /* switch on drive */
434 sect_size=0x080<<pFG->sect_code;
435 retriesrw=0;
436 retriescal=0;
437 offset=0;
438 if (fdc_seek(pCMD, pFG) == false) {
439 stop_fdc_drive(pCMD);
440 if (flags)
441 enable_interrupts();
442 return false;
443 }
444 if((pCMD->result[STATUS_0]&0x20)!=0x20) {
445 printf("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
446 stop_fdc_drive(pCMD);
447 if (flags)
448 enable_interrupts();
449 return false;
450 }
451 /* now determine the next seek point */
452 /* lastblk=pCMD->blnr + blocks; */
453 /* readblk=(pFG->head*pFG->sect)-(pCMD->blnr%(pFG->head*pFG->sect)); */
454 readblk=pFG->sect-(pCMD->blnr%pFG->sect);
455 PRINTF("1st nr of block possible read %ld start %ld\n",readblk,pCMD->blnr);
456 if(readblk>blocks) /* is end within 1st track */
457 readblk=blocks; /* yes, correct it */
458 PRINTF("we read %ld blocks start %ld\n",readblk,pCMD->blnr);
459 bufferw = &buffer[0]; /* setup working buffer */
460 do {
461 retryrw:
462 len=sect_size * readblk;
463 pCMD->cmd[COMMAND]=FDC_CMD_READ;
464 if (fdc_issue_cmd(pCMD, pFG) == false) {
465 stop_fdc_drive(pCMD);
466 if (flags)
467 enable_interrupts();
468 return false;
469 }
470 for (i=0;i<len;i++) {
471 timeout=FDC_TIME_OUT;
472 do {
473 c=read_fdc_reg(FDC_MSR);
474 if((c&0xC0)==0xC0) {
475 bufferw[i]=read_fdc_reg(FDC_FIFO);
476 break;
477 }
478 if((c&0xC0)==0x80) { /* output */
479 PRINTF("Transfer error transfered: at %ld, MSR=%02X\n",i,c);
480 if(i>6) {
481 for(ii=0;ii<7;ii++) {
482 pCMD->result[ii]=bufferw[(i-7+ii)];
483 } /* for */
484 }
485 if(retriesrw++>FDC_RW_RETRIES) {
486 if (retriescal++>FDC_CAL_RETRIES) {
487 stop_fdc_drive(pCMD);
488 if (flags)
489 enable_interrupts();
490 return false;
491 }
492 else {
493 PRINTF(" trying to recalibrate Try %d\n",retriescal);
494 if (fdc_recalibrate(pCMD, pFG) == false) {
495 stop_fdc_drive(pCMD);
496 if (flags)
497 enable_interrupts();
498 return false;
499 }
500 retriesrw=0;
501 goto retrycal;
502 } /* else >FDC_CAL_RETRIES */
503 }
504 else {
505 PRINTF("Read retry %d\n",retriesrw);
506 goto retryrw;
507 } /* else >FDC_RW_RETRIES */
508 }/* if output */
509 timeout--;
510 } while (true);
511 } /* for len */
512 /* the last sector of a track or all data has been read,
513 * we need to get the results */
514 fdc_terminate(pCMD);
515 offset+=(sect_size*readblk); /* set up buffer pointer */
516 bufferw = &buffer[offset];
517 pCMD->blnr+=readblk; /* update current block nr */
518 blocks-=readblk; /* update blocks */
519 if(blocks==0)
520 break; /* we are finish */
521 /* setup new read blocks */
522 /* readblk=pFG->head*pFG->sect; */
523 readblk=pFG->sect;
524 if(readblk>blocks)
525 readblk=blocks;
526 retrycal:
527 /* a seek is necessary */
528 if (fdc_seek(pCMD, pFG) == false) {
529 stop_fdc_drive(pCMD);
530 if (flags)
531 enable_interrupts();
532 return false;
533 }
534 if((pCMD->result[STATUS_0]&0x20)!=0x20) {
535 PRINTF("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
536 stop_fdc_drive(pCMD);
537 return false;
538 }
539 } while (true); /* start over */
540 stop_fdc_drive(pCMD); /* switch off drive */
541 if (flags)
542 enable_interrupts();
543 return true;
544 }
545
546 /* Scan all drives and check if drive is present and disk is inserted */
547 int fdc_check_drive(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
548 {
549 int i,drives,state;
550 /* OK procedure of data book is satisfied.
551 * trying to get some information over the drives */
552 state=0; /* no drives, no disks */
553 for(drives=0;drives<4;drives++) {
554 pCMD->drive=drives;
555 select_fdc_drive(pCMD);
556 pCMD->blnr=0; /* set to the 1st block */
557 if (fdc_recalibrate(pCMD, pFG) == false)
558 continue;
559 if((pCMD->result[STATUS_0]&0x10)==0x10)
560 continue;
561 /* ok drive connected check for disk */
562 state|=(1<<drives);
563 pCMD->blnr=pFG->size; /* set to the last block */
564 if (fdc_seek(pCMD, pFG) == false)
565 continue;
566 pCMD->blnr=0; /* set to the 1st block */
567 if (fdc_recalibrate(pCMD, pFG) == false)
568 continue;
569 pCMD->cmd[COMMAND]=FDC_CMD_READ_ID;
570 if (fdc_issue_cmd(pCMD, pFG) == false)
571 continue;
572 state|=(0x10<<drives);
573 }
574 stop_fdc_drive(pCMD);
575 for(i=0;i<4;i++) {
576 PRINTF("Floppy Drive %d %sconnected %sDisk inserted %s\n",i,
577 ((state&(1<<i))==(1<<i)) ? "":"not ",
578 ((state&(0x10<<i))==(0x10<<i)) ? "":"no ",
579 ((state&(0x10<<i))==(0x10<<i)) ? pFG->name : "");
580 }
581 pCMD->flags=state;
582 return true;
583 }
584
585
586 /**************************************************************************
587 * int fdc_setup
588 * setup the fdc according the datasheet
589 * assuming in PS2 Mode
590 */
591 int fdc_setup(int drive, FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
592 {
593 int i;
594
595 #ifdef CONFIG_SYS_FDC_HW_INIT
596 fdc_hw_init ();
597 #endif
598 /* first, we reset the FDC via the DOR */
599 write_fdc_reg(FDC_DOR,0x00);
600 for(i=0; i<255; i++) /* then we wait some time */
601 udelay(500);
602 /* then, we clear the reset in the DOR */
603 pCMD->drive=drive;
604 select_fdc_drive(pCMD);
605 /* initialize the CCR */
606 write_fdc_reg(FDC_CCR,pFG->rate);
607 /* then initialize the DSR */
608 write_fdc_reg(FDC_DSR,pFG->rate);
609 if (wait_for_fdc_int() == false) {
610 PRINTF("Time Out after writing CCR\n");
611 return false;
612 }
613 /* now issue sense Interrupt and status command
614 * assuming only one drive present (drive 0) */
615 pCMD->dma=0; /* we don't use any dma at all */
616 for(i=0;i<4;i++) {
617 /* issue sense interrupt for all 4 possible drives */
618 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
619 if (fdc_issue_cmd(pCMD, pFG) == false) {
620 PRINTF("Sense Interrupt for drive %d failed\n",i);
621 }
622 }
623 /* issue the configure command */
624 pCMD->drive=drive;
625 select_fdc_drive(pCMD);
626 pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE;
627 if (fdc_issue_cmd(pCMD, pFG) == false) {
628 PRINTF(" configure timeout\n");
629 stop_fdc_drive(pCMD);
630 return false;
631 }
632 /* issue specify command */
633 pCMD->cmd[COMMAND]=FDC_CMD_SPECIFY;
634 if (fdc_issue_cmd(pCMD, pFG) == false) {
635 PRINTF(" specify timeout\n");
636 stop_fdc_drive(pCMD);
637 return false;
638
639 }
640 /* then, we clear the reset in the DOR */
641 /* fdc_check_drive(pCMD,pFG); */
642 /* write_fdc_reg(FDC_DOR,0x04); */
643
644 return true;
645 }
646
647 #if defined(CONFIG_CMD_FDOS)
648
649 /* Low level functions for the Floppy-DOS layer */
650
651 /**************************************************************************
652 * int fdc_fdos_init
653 * initialize the FDC layer
654 *
655 */
656 int fdc_fdos_init (int drive)
657 {
658 FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
659 FDC_COMMAND_STRUCT *pCMD = &cmd;
660
661 /* setup FDC and scan for drives */
662 if (fdc_setup(drive, pCMD, pFG) == false) {
663 printf("\n** Error in setup FDC **\n");
664 return false;
665 }
666 if (fdc_check_drive(pCMD, pFG) == false) {
667 printf("\n** Error in check_drives **\n");
668 return false;
669 }
670 if((pCMD->flags&(1<<drive))==0) {
671 /* drive not available */
672 printf("\n** Drive %d not available **\n",drive);
673 return false;
674 }
675 if((pCMD->flags&(0x10<<drive))==0) {
676 /* no disk inserted */
677 printf("\n** No disk inserted in drive %d **\n",drive);
678 return false;
679 }
680 /* ok, we have a valid source */
681 pCMD->drive=drive;
682
683 /* read first block */
684 pCMD->blnr=0;
685 return true;
686 }
687 /**************************************************************************
688 * int fdc_fdos_seek
689 * parameter is a block number
690 */
691 int fdc_fdos_seek (int where)
692 {
693 FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
694 FDC_COMMAND_STRUCT *pCMD = &cmd;
695
696 pCMD -> blnr = where ;
697 return (fdc_seek (pCMD, pFG));
698 }
699 /**************************************************************************
700 * int fdc_fdos_read
701 * the length is in block number
702 */
703 int fdc_fdos_read (void *buffer, int len)
704 {
705 FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
706 FDC_COMMAND_STRUCT *pCMD = &cmd;
707
708 return (fdc_read_data (buffer, len, pCMD, pFG));
709 }
710 #endif
711
712 #if defined(CONFIG_CMD_FDC)
713 /****************************************************************************
714 * main routine do_fdcboot
715 */
716 int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
717 {
718 FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
719 FDC_COMMAND_STRUCT *pCMD = &cmd;
720 unsigned long addr,imsize;
721 image_header_t *hdr; /* used for fdc boot */
722 unsigned char boot_drive;
723 int i,nrofblk;
724 #if defined(CONFIG_FIT)
725 const void *fit_hdr = NULL;
726 #endif
727
728 switch (argc) {
729 case 1:
730 addr = CONFIG_SYS_LOAD_ADDR;
731 boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
732 break;
733 case 2:
734 addr = simple_strtoul(argv[1], NULL, 16);
735 boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
736 break;
737 case 3:
738 addr = simple_strtoul(argv[1], NULL, 16);
739 boot_drive=simple_strtoul(argv[2], NULL, 10);
740 break;
741 default:
742 return CMD_RET_USAGE;
743 }
744 /* setup FDC and scan for drives */
745 if (fdc_setup(boot_drive, pCMD, pFG) == false) {
746 printf("\n** Error in setup FDC **\n");
747 return 1;
748 }
749 if (fdc_check_drive(pCMD, pFG) == false) {
750 printf("\n** Error in check_drives **\n");
751 return 1;
752 }
753 if((pCMD->flags&(1<<boot_drive))==0) {
754 /* drive not available */
755 printf("\n** Drive %d not availabe **\n",boot_drive);
756 return 1;
757 }
758 if((pCMD->flags&(0x10<<boot_drive))==0) {
759 /* no disk inserted */
760 printf("\n** No disk inserted in drive %d **\n",boot_drive);
761 return 1;
762 }
763 /* ok, we have a valid source */
764 pCMD->drive=boot_drive;
765 /* read first block */
766 pCMD->blnr=0;
767 if (fdc_read_data((unsigned char *)addr, 1, pCMD, pFG) == false) {
768 printf("\nRead error:");
769 for(i=0;i<7;i++)
770 printf("result%d: 0x%02X\n",i,pCMD->result[i]);
771 return 1;
772 }
773
774 switch (genimg_get_format ((void *)addr)) {
775 case IMAGE_FORMAT_LEGACY:
776 hdr = (image_header_t *)addr;
777 image_print_contents (hdr);
778
779 imsize = image_get_image_size (hdr);
780 break;
781 #if defined(CONFIG_FIT)
782 case IMAGE_FORMAT_FIT:
783 fit_hdr = (const void *)addr;
784 puts ("Fit image detected...\n");
785
786 imsize = fit_get_size (fit_hdr);
787 break;
788 #endif
789 default:
790 puts ("** Unknown image type\n");
791 return 1;
792 }
793
794 nrofblk=imsize/512;
795 if((imsize%512)>0)
796 nrofblk++;
797 printf("Loading %ld Bytes (%d blocks) at 0x%08lx..\n",imsize,nrofblk,addr);
798 pCMD->blnr=0;
799 if (fdc_read_data((unsigned char *)addr, nrofblk, pCMD, pFG) == false) {
800 /* read image block */
801 printf("\nRead error:");
802 for(i=0;i<7;i++)
803 printf("result%d: 0x%02X\n",i,pCMD->result[i]);
804 return 1;
805 }
806 printf("OK %ld Bytes loaded.\n",imsize);
807
808 flush_cache (addr, imsize);
809
810 #if defined(CONFIG_FIT)
811 /* This cannot be done earlier, we need complete FIT image in RAM first */
812 if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
813 if (!fit_check_format (fit_hdr)) {
814 puts ("** Bad FIT image format\n");
815 return 1;
816 }
817 fit_print_contents (fit_hdr);
818 }
819 #endif
820
821 /* Loading ok, update default load address */
822 load_addr = addr;
823
824 return bootm_maybe_autostart(cmdtp, argv[0]);
825 }
826
827 U_BOOT_CMD(
828 fdcboot, 3, 1, do_fdcboot,
829 "boot from floppy device",
830 "loadAddr drive"
831 );
832 #endif
"Das U-Boot" Source Tree