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 #ifndef TRUE
43 #define TRUE 1
44 #endif
45 #ifndef FALSE
46 #define FALSE 0
47 #endif
48
49 /*#if defined(CONFIG_CMD_DATE) */
50 /*#include <rtc.h> */
51 /*#endif */
52
53 typedef struct {
54 int flags; /* connected drives ect */
55 unsigned long blnr; /* Logical block nr */
56 uchar drive; /* drive no */
57 uchar cmdlen; /* cmd length */
58 uchar cmd[16]; /* cmd desc */
59 uchar dma; /* if > 0 dma enabled */
60 uchar result[11]; /* status information */
61 uchar resultlen; /* lenght of result */
62 } FDC_COMMAND_STRUCT;
63
64 /* flags: only the lower 8bit used:
65 * bit 0 if set drive 0 is present
66 * bit 1 if set drive 1 is present
67 * bit 2 if set drive 2 is present
68 * bit 3 if set drive 3 is present
69 * bit 4 if set disk in drive 0 is inserted
70 * bit 5 if set disk in drive 1 is inserted
71 * bit 6 if set disk in drive 2 is inserted
72 * bit 7 if set disk in drive 4 is inserted
73 */
74
75 /* cmd indexes */
76 #define COMMAND 0
77 #define DRIVE 1
78 #define CONFIG0 1
79 #define SPEC_HUTSRT 1
80 #define TRACK 2
81 #define CONFIG1 2
82 #define SPEC_HLT 2
83 #define HEAD 3
84 #define CONFIG2 3
85 #define SECTOR 4
86 #define SECTOR_SIZE 5
87 #define LAST_TRACK 6
88 #define GAP 7
89 #define DTL 8
90 /* result indexes */
91 #define STATUS_0 0
92 #define STATUS_PCN 1
93 #define STATUS_1 1
94 #define STATUS_2 2
95 #define STATUS_TRACK 3
96 #define STATUS_HEAD 4
97 #define STATUS_SECT 5
98 #define STATUS_SECT_SIZE 6
99
100
101 /* Register addresses */
102 #define FDC_BASE 0x3F0
103 #define FDC_SRA FDC_BASE + 0 /* Status Register A */
104 #define FDC_SRB FDC_BASE + 1 /* Status Register B */
105 #define FDC_DOR FDC_BASE + 2 /* Digital Output Register */
106 #define FDC_TDR FDC_BASE + 3 /* Tape Drive Register */
107 #define FDC_DSR FDC_BASE + 4 /* Data rate Register */
108 #define FDC_MSR FDC_BASE + 4 /* Main Status Register */
109 #define FDC_FIFO FDC_BASE + 5 /* FIFO */
110 #define FDC_DIR FDC_BASE + 6 /* Digital Input Register */
111 #define FDC_CCR FDC_BASE + 7 /* Configuration Control */
112 /* Commands */
113 #define FDC_CMD_SENSE_INT 0x08
114 #define FDC_CMD_CONFIGURE 0x13
115 #define FDC_CMD_SPECIFY 0x03
116 #define FDC_CMD_RECALIBRATE 0x07
117 #define FDC_CMD_READ 0x06
118 #define FDC_CMD_READ_TRACK 0x02
119 #define FDC_CMD_READ_ID 0x0A
120 #define FDC_CMD_DUMP_REG 0x0E
121 #define FDC_CMD_SEEK 0x0F
122
123 #define FDC_CMD_SENSE_INT_LEN 0x01
124 #define FDC_CMD_CONFIGURE_LEN 0x04
125 #define FDC_CMD_SPECIFY_LEN 0x03
126 #define FDC_CMD_RECALIBRATE_LEN 0x02
127 #define FDC_CMD_READ_LEN 0x09
128 #define FDC_CMD_READ_TRACK_LEN 0x09
129 #define FDC_CMD_READ_ID_LEN 0x02
130 #define FDC_CMD_DUMP_REG_LEN 0x01
131 #define FDC_CMD_SEEK_LEN 0x03
132
133 #define FDC_FIFO_THR 0x0C
134 #define FDC_FIFO_DIS 0x00
135 #define FDC_IMPLIED_SEEK 0x01
136 #define FDC_POLL_DIS 0x00
137 #define FDC_PRE_TRK 0x00
138 #define FDC_CONFIGURE FDC_FIFO_THR | (FDC_POLL_DIS<<4) | (FDC_FIFO_DIS<<5) | (FDC_IMPLIED_SEEK << 6)
139 #define FDC_MFM_MODE 0x01 /* MFM enable */
140 #define FDC_SKIP_MODE 0x00 /* skip enable */
141
142 #define FDC_TIME_OUT 100000 /* time out */
143 #define FDC_RW_RETRIES 3 /* read write retries */
144 #define FDC_CAL_RETRIES 3 /* calibration and seek retries */
145
146
147 /* Disk structure */
148 typedef struct {
149 unsigned int size; /* nr of sectors total */
150 unsigned int sect; /* sectors per track */
151 unsigned int head; /* nr of heads */
152 unsigned int track; /* nr of tracks */
153 unsigned int stretch; /* !=0 means double track steps */
154 unsigned char gap; /* gap1 size */
155 unsigned char rate; /* data rate. |= 0x40 for perpendicular */
156 unsigned char spec1; /* stepping rate, head unload time */
157 unsigned char fmt_gap;/* gap2 size */
158 unsigned char hlt; /* head load time */
159 unsigned char sect_code;/* Sector Size code */
160 const char * name; /* used only for predefined formats */
161 } FD_GEO_STRUCT;
162
163
164 /* supported Floppy types (currently only one) */
165 const static FD_GEO_STRUCT floppy_type[2] = {
166 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,16,2,"H1440" }, /* 7 1.44MB 3.5" */
167 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00, 0,0,NULL }, /* end of table */
168 };
169
170 static FDC_COMMAND_STRUCT cmd; /* global command struct */
171
172 /* If the boot drive number is undefined, we assume it's drive 0 */
173 #ifndef CONFIG_SYS_FDC_DRIVE_NUMBER
174 #define CONFIG_SYS_FDC_DRIVE_NUMBER 0
175 #endif
176
177 /* Hardware access */
178 #ifndef CONFIG_SYS_ISA_IO_STRIDE
179 #define CONFIG_SYS_ISA_IO_STRIDE 1
180 #endif
181
182 #ifndef CONFIG_SYS_ISA_IO_OFFSET
183 #define CONFIG_SYS_ISA_IO_OFFSET 0
184 #endif
185
186
187 #ifdef CONFIG_AMIGAONEG3SE
188 unsigned char INT6_Status;
189
fdc_interrupt(void)190 void fdc_interrupt(void)
191 {
192 INT6_Status = 0x80;
193 }
194
195 /* waits for an interrupt (polling) */
wait_for_fdc_int(void)196 int wait_for_fdc_int(void)
197 {
198 unsigned long timeout;
199 timeout = FDC_TIME_OUT;
200 while(((volatile)INT6_Status & 0x80) == 0) {
201 timeout--;
202 udelay(10);
203 if(timeout == 0) /* timeout occured */
204 return FALSE;
205 }
206 INT6_Status = 0;
207 return TRUE;
208 }
209 #endif
210
211 /* Supporting Functions */
212 /* reads a Register of the FDC */
read_fdc_reg(unsigned int addr)213 unsigned char read_fdc_reg(unsigned int addr)
214 {
215 volatile unsigned char *val =
216 (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
217 (addr * CONFIG_SYS_ISA_IO_STRIDE) +
218 CONFIG_SYS_ISA_IO_OFFSET);
219
220 return val [0];
221 }
222
223 /* writes a Register of the FDC */
write_fdc_reg(unsigned int addr,unsigned char val)224 void write_fdc_reg(unsigned int addr, unsigned char val)
225 {
226 volatile unsigned char *tmp =
227 (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
228 (addr * CONFIG_SYS_ISA_IO_STRIDE) +
229 CONFIG_SYS_ISA_IO_OFFSET);
230 tmp[0]=val;
231 }
232
233 #ifndef CONFIG_AMIGAONEG3SE
234 /* waits for an interrupt (polling) */
wait_for_fdc_int(void)235 int wait_for_fdc_int(void)
236 {
237 unsigned long timeout;
238 timeout = FDC_TIME_OUT;
239 while((read_fdc_reg(FDC_SRA)&0x80)==0) {
240 timeout--;
241 udelay(10);
242 if(timeout==0) /* timeout occured */
243 return FALSE;
244 }
245 return TRUE;
246 }
247
248 #endif
249
250 /* reads a byte from the FIFO of the FDC and checks direction and RQM bit
251 of the MSR. returns -1 if timeout, or byte if ok */
read_fdc_byte(void)252 int read_fdc_byte(void)
253 {
254 unsigned long timeout;
255 timeout = FDC_TIME_OUT;
256 while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
257 /* direction out and ready */
258 udelay(10);
259 timeout--;
260 if(timeout==0) /* timeout occured */
261 return -1;
262 }
263 return read_fdc_reg(FDC_FIFO);
264 }
265
266 /* if the direction of the FIFO is wrong, this routine is used to
267 empty the FIFO. Should _not_ be used */
fdc_need_more_output(void)268 int fdc_need_more_output(void)
269 {
270 unsigned char c;
271 while((read_fdc_reg(FDC_MSR)&0xC0)==0xC0) {
272 c=(unsigned char)read_fdc_byte();
273 printf("Error: more output: %x\n",c);
274 }
275 return TRUE;
276 }
277
278
279 /* writes a byte to the FIFO of the FDC and checks direction and RQM bit
280 of the MSR */
write_fdc_byte(unsigned char val)281 int write_fdc_byte(unsigned char val)
282 {
283 unsigned long timeout;
284 timeout = FDC_TIME_OUT;
285 while((read_fdc_reg(FDC_MSR)&0xC0)!=0x80) {
286 /* direction in and ready for byte */
287 timeout--;
288 udelay(10);
289 fdc_need_more_output();
290 if(timeout==0) /* timeout occured */
291 return FALSE;
292 }
293 write_fdc_reg(FDC_FIFO,val);
294 return TRUE;
295 }
296
297 /* sets up all FDC commands and issues it to the FDC. If
298 the command causes direct results (no Execution Phase)
299 the result is be read as well. */
300
fdc_issue_cmd(FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)301 int fdc_issue_cmd(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
302 {
303 int i;
304 unsigned long head,track,sect,timeout;
305 track = pCMD->blnr / (pFG->sect * pFG->head); /* track nr */
306 sect = pCMD->blnr % (pFG->sect * pFG->head); /* remaining blocks */
307 head = sect / pFG->sect; /* head nr */
308 sect = sect % pFG->sect; /* remaining blocks */
309 sect++; /* sectors are 1 based */
310 PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",
311 pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr);
312
313 if(head|=0) { /* max heads = 2 */
314 pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */
315 pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
316 }
317 else {
318 pCMD->cmd[DRIVE]=pCMD->drive; /* head 0 */
319 pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
320 }
321 pCMD->cmd[TRACK]=(unsigned char) track; /* track */
322 switch (pCMD->cmd[COMMAND]) {
323 case FDC_CMD_READ:
324 pCMD->cmd[SECTOR]=(unsigned char) sect; /* sector */
325 pCMD->cmd[SECTOR_SIZE]=pFG->sect_code; /* sector size code */
326 pCMD->cmd[LAST_TRACK]=pFG->sect; /* End of track */
327 pCMD->cmd[GAP]=pFG->gap; /* gap */
328 pCMD->cmd[DTL]=0xFF; /* DTL */
329 pCMD->cmdlen=FDC_CMD_READ_LEN;
330 pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
331 pCMD->cmd[COMMAND]|=(FDC_SKIP_MODE<<5); /* set Skip bit */
332 pCMD->resultlen=0; /* result only after execution */
333 break;
334 case FDC_CMD_SEEK:
335 pCMD->cmdlen=FDC_CMD_SEEK_LEN;
336 pCMD->resultlen=0; /* no result */
337 break;
338 case FDC_CMD_CONFIGURE:
339 pCMD->cmd[CONFIG0]=0;
340 pCMD->cmd[CONFIG1]=FDC_CONFIGURE; /* FIFO Threshold, Poll, Enable FIFO */
341 pCMD->cmd[CONFIG2]=FDC_PRE_TRK; /* Precompensation Track */
342 pCMD->cmdlen=FDC_CMD_CONFIGURE_LEN;
343 pCMD->resultlen=0; /* no result */
344 break;
345 case FDC_CMD_SPECIFY:
346 pCMD->cmd[SPEC_HUTSRT]=pFG->spec1;
347 pCMD->cmd[SPEC_HLT]=(pFG->hlt)<<1; /* head load time */
348 if(pCMD->dma==0)
349 pCMD->cmd[SPEC_HLT]|=0x1; /* no dma */
350 pCMD->cmdlen=FDC_CMD_SPECIFY_LEN;
351 pCMD->resultlen=0; /* no result */
352 break;
353 case FDC_CMD_DUMP_REG:
354 pCMD->cmdlen=FDC_CMD_DUMP_REG_LEN;
355 pCMD->resultlen=10; /* 10 byte result */
356 break;
357 case FDC_CMD_READ_ID:
358 pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
359 pCMD->cmdlen=FDC_CMD_READ_ID_LEN;
360 pCMD->resultlen=7; /* 7 byte result */
361 break;
362 case FDC_CMD_RECALIBRATE:
363 pCMD->cmd[DRIVE]&=0x03; /* don't set the head bit */
364 pCMD->cmdlen=FDC_CMD_RECALIBRATE_LEN;
365 pCMD->resultlen=0; /* no result */
366 break;
367 break;
368 case FDC_CMD_SENSE_INT:
369 pCMD->cmdlen=FDC_CMD_SENSE_INT_LEN;
370 pCMD->resultlen=2;
371 break;
372 }
373 for(i=0;i<pCMD->cmdlen;i++) {
374 /* PRINTF("write cmd%d = 0x%02X\n",i,pCMD->cmd[i]); */
375 if(write_fdc_byte(pCMD->cmd[i])==FALSE) {
376 PRINTF("Error: timeout while issue cmd%d\n",i);
377 return FALSE;
378 }
379 }
380 timeout=FDC_TIME_OUT;
381 for(i=0;i<pCMD->resultlen;i++) {
382 while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
383 timeout--;
384 if(timeout==0) {
385 PRINTF(" timeout while reading result%d MSR=0x%02X\n",i,read_fdc_reg(FDC_MSR));
386 return FALSE;
387 }
388 }
389 pCMD->result[i]=(unsigned char)read_fdc_byte();
390 }
391 return TRUE;
392 }
393
394 /* selects the drive assigned in the cmd structur and
395 switches on the Motor */
select_fdc_drive(FDC_COMMAND_STRUCT * pCMD)396 void select_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
397 {
398 unsigned char val;
399
400 val=(1<<(4+pCMD->drive))|pCMD->drive|0xC; /* set reset, dma gate and motor bits */
401 if((read_fdc_reg(FDC_DOR)&val)!=val) {
402 write_fdc_reg(FDC_DOR,val);
403 for(val=0;val<255;val++)
404 udelay(500); /* wait some time to start motor */
405 }
406 }
407
408 /* switches off the Motor of the specified drive */
stop_fdc_drive(FDC_COMMAND_STRUCT * pCMD)409 void stop_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
410 {
411 unsigned char val;
412
413 val=(1<<(4+pCMD->drive))|pCMD->drive; /* sets motor bits */
414 write_fdc_reg(FDC_DOR,(read_fdc_reg(FDC_DOR)&~val));
415 }
416
417 /* issues a recalibrate command, waits for interrupt and
418 * issues a sense_interrupt */
fdc_recalibrate(FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)419 int fdc_recalibrate(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
420 {
421 pCMD->cmd[COMMAND]=FDC_CMD_RECALIBRATE;
422 if(fdc_issue_cmd(pCMD,pFG)==FALSE)
423 return FALSE;
424 while(wait_for_fdc_int()!=TRUE);
425 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
426 return(fdc_issue_cmd(pCMD,pFG));
427 }
428
429 /* issues a recalibrate command, waits for interrupt and
430 * issues a sense_interrupt */
fdc_seek(FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)431 int fdc_seek(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
432 {
433 pCMD->cmd[COMMAND]=FDC_CMD_SEEK;
434 if(fdc_issue_cmd(pCMD,pFG)==FALSE)
435 return FALSE;
436 while(wait_for_fdc_int()!=TRUE);
437 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
438 return(fdc_issue_cmd(pCMD,pFG));
439 }
440
441 #ifndef CONFIG_AMIGAONEG3SE
442 /* terminates current command, by not servicing the FIFO
443 * waits for interrupt and fills in the result bytes */
fdc_terminate(FDC_COMMAND_STRUCT * pCMD)444 int fdc_terminate(FDC_COMMAND_STRUCT *pCMD)
445 {
446 int i;
447 for(i=0;i<100;i++)
448 udelay(500); /* wait 500usec for fifo overrun */
449 while((read_fdc_reg(FDC_SRA)&0x80)==0x00); /* wait as long as no int has occured */
450 for(i=0;i<7;i++) {
451 pCMD->result[i]=(unsigned char)read_fdc_byte();
452 }
453 return TRUE;
454 }
455 #endif
456 #ifdef CONFIG_AMIGAONEG3SE
fdc_terminate(FDC_COMMAND_STRUCT * pCMD)457 int fdc_terminate(FDC_COMMAND_STRUCT *pCMD)
458 {
459 int i;
460 for(i=0;i<100;i++)
461 udelay(500); /* wait 500usec for fifo overrun */
462 while((INT6_Status&0x80)==0x00); /* wait as long as no int has occured */
463 for(i=0;i<7;i++) {
464 pCMD->result[i]=(unsigned char)read_fdc_byte();
465 }
466 INT6_Status = 0;
467 return TRUE;
468 }
469
470 #endif
471
472 #ifdef CONFIG_AMIGAONEG3SE
473 #define disable_interrupts() 0
474 #define enable_interrupts() (void)0
475 #endif
476
477 /* 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)478 int fdc_read_data(unsigned char *buffer, unsigned long blocks,FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
479 {
480 /* first seek to start address */
481 unsigned long len,lastblk,readblk,i,timeout,ii,offset;
482 unsigned char pcn,c,retriesrw,retriescal;
483 unsigned char *bufferw; /* working buffer */
484 int sect_size;
485 int flags;
486
487 flags=disable_interrupts(); /* switch off all Interrupts */
488 select_fdc_drive(pCMD); /* switch on drive */
489 sect_size=0x080<<pFG->sect_code;
490 retriesrw=0;
491 retriescal=0;
492 offset=0;
493 if(fdc_seek(pCMD,pFG)==FALSE) {
494 stop_fdc_drive(pCMD);
495 enable_interrupts();
496 return FALSE;
497 }
498 if((pCMD->result[STATUS_0]&0x20)!=0x20) {
499 printf("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
500 stop_fdc_drive(pCMD);
501 enable_interrupts();
502 return FALSE;
503 }
504 pcn=pCMD->result[STATUS_PCN]; /* current track */
505 /* now determine the next seek point */
506 lastblk=pCMD->blnr + blocks;
507 /* readblk=(pFG->head*pFG->sect)-(pCMD->blnr%(pFG->head*pFG->sect)); */
508 readblk=pFG->sect-(pCMD->blnr%pFG->sect);
509 PRINTF("1st nr of block possible read %ld start %ld\n",readblk,pCMD->blnr);
510 if(readblk>blocks) /* is end within 1st track */
511 readblk=blocks; /* yes, correct it */
512 PRINTF("we read %ld blocks start %ld\n",readblk,pCMD->blnr);
513 bufferw = &buffer[0]; /* setup working buffer */
514 do {
515 retryrw:
516 len=sect_size * readblk;
517 pCMD->cmd[COMMAND]=FDC_CMD_READ;
518 if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
519 stop_fdc_drive(pCMD);
520 enable_interrupts();
521 return FALSE;
522 }
523 for (i=0;i<len;i++) {
524 timeout=FDC_TIME_OUT;
525 do {
526 c=read_fdc_reg(FDC_MSR);
527 if((c&0xC0)==0xC0) {
528 bufferw[i]=read_fdc_reg(FDC_FIFO);
529 break;
530 }
531 if((c&0xC0)==0x80) { /* output */
532 PRINTF("Transfer error transfered: at %ld, MSR=%02X\n",i,c);
533 if(i>6) {
534 for(ii=0;ii<7;ii++) {
535 pCMD->result[ii]=bufferw[(i-7+ii)];
536 } /* for */
537 }
538 if(retriesrw++>FDC_RW_RETRIES) {
539 if (retriescal++>FDC_CAL_RETRIES) {
540 stop_fdc_drive(pCMD);
541 enable_interrupts();
542 return FALSE;
543 }
544 else {
545 PRINTF(" trying to recalibrate Try %d\n",retriescal);
546 if(fdc_recalibrate(pCMD,pFG)==FALSE) {
547 stop_fdc_drive(pCMD);
548 enable_interrupts();
549 return FALSE;
550 }
551 retriesrw=0;
552 goto retrycal;
553 } /* else >FDC_CAL_RETRIES */
554 }
555 else {
556 PRINTF("Read retry %d\n",retriesrw);
557 goto retryrw;
558 } /* else >FDC_RW_RETRIES */
559 }/* if output */
560 timeout--;
561 }while(TRUE);
562 } /* for len */
563 /* the last sector of a track or all data has been read,
564 * we need to get the results */
565 fdc_terminate(pCMD);
566 offset+=(sect_size*readblk); /* set up buffer pointer */
567 bufferw = &buffer[offset];
568 pCMD->blnr+=readblk; /* update current block nr */
569 blocks-=readblk; /* update blocks */
570 if(blocks==0)
571 break; /* we are finish */
572 /* setup new read blocks */
573 /* readblk=pFG->head*pFG->sect; */
574 readblk=pFG->sect;
575 if(readblk>blocks)
576 readblk=blocks;
577 retrycal:
578 /* a seek is necessary */
579 if(fdc_seek(pCMD,pFG)==FALSE) {
580 stop_fdc_drive(pCMD);
581 enable_interrupts();
582 return FALSE;
583 }
584 if((pCMD->result[STATUS_0]&0x20)!=0x20) {
585 PRINTF("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
586 stop_fdc_drive(pCMD);
587 return FALSE;
588 }
589 pcn=pCMD->result[STATUS_PCN]; /* current track */
590 }while(TRUE); /* start over */
591 stop_fdc_drive(pCMD); /* switch off drive */
592 enable_interrupts();
593 return TRUE;
594 }
595
596 #ifdef CONFIG_AMIGAONEG3SE
597 #undef disable_interrupts()
598 #undef enable_interrupts()
599 #endif
600
601 /* Scan all drives and check if drive is present and disk is inserted */
fdc_check_drive(FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)602 int fdc_check_drive(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
603 {
604 int i,drives,state;
605 /* OK procedure of data book is satisfied.
606 * trying to get some information over the drives */
607 state=0; /* no drives, no disks */
608 for(drives=0;drives<4;drives++) {
609 pCMD->drive=drives;
610 select_fdc_drive(pCMD);
611 pCMD->blnr=0; /* set to the 1st block */
612 if(fdc_recalibrate(pCMD,pFG)==FALSE)
613 continue;
614 if((pCMD->result[STATUS_0]&0x10)==0x10)
615 continue;
616 /* ok drive connected check for disk */
617 state|=(1<<drives);
618 pCMD->blnr=pFG->size; /* set to the last block */
619 if(fdc_seek(pCMD,pFG)==FALSE)
620 continue;
621 pCMD->blnr=0; /* set to the 1st block */
622 if(fdc_recalibrate(pCMD,pFG)==FALSE)
623 continue;
624 pCMD->cmd[COMMAND]=FDC_CMD_READ_ID;
625 if(fdc_issue_cmd(pCMD,pFG)==FALSE)
626 continue;
627 state|=(0x10<<drives);
628 }
629 stop_fdc_drive(pCMD);
630 for(i=0;i<4;i++) {
631 PRINTF("Floppy Drive %d %sconnected %sDisk inserted %s\n",i,
632 ((state&(1<<i))==(1<<i)) ? "":"not ",
633 ((state&(0x10<<i))==(0x10<<i)) ? "":"no ",
634 ((state&(0x10<<i))==(0x10<<i)) ? pFG->name : "");
635 }
636 pCMD->flags=state;
637 return TRUE;
638 }
639
640
641 /**************************************************************************
642 * int fdc_setup
643 * setup the fdc according the datasheet
644 * assuming in PS2 Mode
645 */
fdc_setup(int drive,FDC_COMMAND_STRUCT * pCMD,FD_GEO_STRUCT * pFG)646 int fdc_setup(int drive, FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
647 {
648 int i;
649
650 #ifdef CONFIG_AMIGAONEG3SE
651 irq_install_handler(6, (interrupt_handler_t *)fdc_interrupt, NULL);
652 i8259_unmask_irq(6);
653 #endif
654
655 #ifdef CONFIG_SYS_FDC_HW_INIT
656 fdc_hw_init ();
657 #endif
658 /* first, we reset the FDC via the DOR */
659 write_fdc_reg(FDC_DOR,0x00);
660 for(i=0; i<255; i++) /* then we wait some time */
661 udelay(500);
662 /* then, we clear the reset in the DOR */
663 pCMD->drive=drive;
664 select_fdc_drive(pCMD);
665 /* initialize the CCR */
666 write_fdc_reg(FDC_CCR,pFG->rate);
667 /* then initialize the DSR */
668 write_fdc_reg(FDC_DSR,pFG->rate);
669 if(wait_for_fdc_int()==FALSE) {
670 PRINTF("Time Out after writing CCR\n");
671 return FALSE;
672 }
673 /* now issue sense Interrupt and status command
674 * assuming only one drive present (drive 0) */
675 pCMD->dma=0; /* we don't use any dma at all */
676 for(i=0;i<4;i++) {
677 /* issue sense interrupt for all 4 possible drives */
678 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
679 if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
680 PRINTF("Sense Interrupt for drive %d failed\n",i);
681 }
682 }
683 /* issue the configure command */
684 pCMD->drive=drive;
685 select_fdc_drive(pCMD);
686 pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE;
687 if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
688 PRINTF(" configure timeout\n");
689 stop_fdc_drive(pCMD);
690 return FALSE;
691 }
692 /* issue specify command */
693 pCMD->cmd[COMMAND]=FDC_CMD_SPECIFY;
694 if(fdc_issue_cmd(pCMD,pFG)==FALSE) {
695 PRINTF(" specify timeout\n");
696 stop_fdc_drive(pCMD);
697 return FALSE;
698
699 }
700 /* then, we clear the reset in the DOR */
701 /* fdc_check_drive(pCMD,pFG); */
702 /* write_fdc_reg(FDC_DOR,0x04); */
703
704 return TRUE;
705 }
706
707 #if defined(CONFIG_CMD_FDOS)
708
709 /* Low level functions for the Floppy-DOS layer */
710
711 /**************************************************************************
712 * int fdc_fdos_init
713 * initialize the FDC layer
714 *
715 */
fdc_fdos_init(int drive)716 int fdc_fdos_init (int drive)
717 {
718 FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
719 FDC_COMMAND_STRUCT *pCMD = &cmd;
720
721 /* setup FDC and scan for drives */
722 if(fdc_setup(drive,pCMD,pFG)==FALSE) {
723 printf("\n** Error in setup FDC **\n");
724 return FALSE;
725 }
726 if(fdc_check_drive(pCMD,pFG)==FALSE) {
727 printf("\n** Error in check_drives **\n");
728 return FALSE;
729 }
730 if((pCMD->flags&(1<<drive))==0) {
731 /* drive not available */
732 printf("\n** Drive %d not available **\n",drive);
733 return FALSE;
734 }
735 if((pCMD->flags&(0x10<<drive))==0) {
736 /* no disk inserted */
737 printf("\n** No disk inserted in drive %d **\n",drive);
738 return FALSE;
739 }
740 /* ok, we have a valid source */
741 pCMD->drive=drive;
742
743 /* read first block */
744 pCMD->blnr=0;
745 return TRUE;
746 }
747 /**************************************************************************
748 * int fdc_fdos_seek
749 * parameter is a block number
750 */
fdc_fdos_seek(int where)751 int fdc_fdos_seek (int where)
752 {
753 FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
754 FDC_COMMAND_STRUCT *pCMD = &cmd;
755
756 pCMD -> blnr = where ;
757 return (fdc_seek (pCMD, pFG));
758 }
759 /**************************************************************************
760 * int fdc_fdos_read
761 * the length is in block number
762 */
fdc_fdos_read(void * buffer,int len)763 int fdc_fdos_read (void *buffer, int len)
764 {
765 FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
766 FDC_COMMAND_STRUCT *pCMD = &cmd;
767
768 return (fdc_read_data (buffer, len, pCMD, pFG));
769 }
770 #endif
771
772 #if defined(CONFIG_CMD_FDC)
773 /****************************************************************************
774 * main routine do_fdcboot
775 */
do_fdcboot(cmd_tbl_t * cmdtp,int flag,int argc,char * argv[])776 int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
777 {
778 FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
779 FDC_COMMAND_STRUCT *pCMD = &cmd;
780 unsigned long addr,imsize;
781 image_header_t *hdr; /* used for fdc boot */
782 unsigned char boot_drive;
783 int i,nrofblk;
784 char *ep;
785 int rcode = 0;
786 #if defined(CONFIG_FIT)
787 const void *fit_hdr = NULL;
788 #endif
789
790 switch (argc) {
791 case 1:
792 addr = CONFIG_SYS_LOAD_ADDR;
793 boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
794 break;
795 case 2:
796 addr = simple_strtoul(argv[1], NULL, 16);
797 boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
798 break;
799 case 3:
800 addr = simple_strtoul(argv[1], NULL, 16);
801 boot_drive=simple_strtoul(argv[2], NULL, 10);
802 break;
803 default:
804 cmd_usage(cmdtp);
805 return 1;
806 }
807 /* setup FDC and scan for drives */
808 if(fdc_setup(boot_drive,pCMD,pFG)==FALSE) {
809 printf("\n** Error in setup FDC **\n");
810 return 1;
811 }
812 if(fdc_check_drive(pCMD,pFG)==FALSE) {
813 printf("\n** Error in check_drives **\n");
814 return 1;
815 }
816 if((pCMD->flags&(1<<boot_drive))==0) {
817 /* drive not available */
818 printf("\n** Drive %d not availabe **\n",boot_drive);
819 return 1;
820 }
821 if((pCMD->flags&(0x10<<boot_drive))==0) {
822 /* no disk inserted */
823 printf("\n** No disk inserted in drive %d **\n",boot_drive);
824 return 1;
825 }
826 /* ok, we have a valid source */
827 pCMD->drive=boot_drive;
828 /* read first block */
829 pCMD->blnr=0;
830 if(fdc_read_data((unsigned char *)addr,1,pCMD,pFG)==FALSE) {
831 printf("\nRead error:");
832 for(i=0;i<7;i++)
833 printf("result%d: 0x%02X\n",i,pCMD->result[i]);
834 return 1;
835 }
836
837 switch (genimg_get_format ((void *)addr)) {
838 case IMAGE_FORMAT_LEGACY:
839 hdr = (image_header_t *)addr;
840 image_print_contents (hdr);
841
842 imsize = image_get_image_size (hdr);
843 break;
844 #if defined(CONFIG_FIT)
845 case IMAGE_FORMAT_FIT:
846 fit_hdr = (const void *)addr;
847 puts ("Fit image detected...\n");
848
849 imsize = fit_get_size (fit_hdr);
850 break;
851 #endif
852 default:
853 puts ("** Unknown image type\n");
854 return 1;
855 }
856
857 nrofblk=imsize/512;
858 if((imsize%512)>0)
859 nrofblk++;
860 printf("Loading %ld Bytes (%d blocks) at 0x%08lx..\n",imsize,nrofblk,addr);
861 pCMD->blnr=0;
862 if(fdc_read_data((unsigned char *)addr,nrofblk,pCMD,pFG)==FALSE) {
863 /* read image block */
864 printf("\nRead error:");
865 for(i=0;i<7;i++)
866 printf("result%d: 0x%02X\n",i,pCMD->result[i]);
867 return 1;
868 }
869 printf("OK %ld Bytes loaded.\n",imsize);
870
871 flush_cache (addr, imsize);
872
873 #if defined(CONFIG_FIT)
874 /* This cannot be done earlier, we need complete FIT image in RAM first */
875 if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
876 if (!fit_check_format (fit_hdr)) {
877 puts ("** Bad FIT image format\n");
878 return 1;
879 }
880 fit_print_contents (fit_hdr);
881 }
882 #endif
883
884 /* Loading ok, update default load address */
885 load_addr = addr;
886
887 /* Check if we should attempt an auto-start */
888 if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
889 char *local_args[2];
890 extern int do_bootm (cmd_tbl_t *, int, int, char *[]);
891
892 local_args[0] = argv[0];
893 local_args[1] = NULL;
894
895 printf ("Automatic boot of image at addr 0x%08lX ...\n", addr);
896
897 do_bootm (cmdtp, 0, 1, local_args);
898 rcode ++;
899 }
900 return rcode;
901 }
902
903 U_BOOT_CMD(
904 fdcboot, 3, 1, do_fdcboot,
905 "boot from floppy device",
906 "loadAddr drive"
907 );
908 #endif
909