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3863585b WD |
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 | ||
50 | #if (CONFIG_COMMANDS & CFG_CMD_DATE) | |
51 | #include <rtc.h> | |
52 | #endif | |
53 | ||
54 | #if (CONFIG_COMMANDS & CFG_CMD_FDC) | |
55 | ||
56 | ||
57 | typedef struct { | |
58 | int flags; /* connected drives ect */ | |
59 | unsigned long blnr; /* Logical block nr */ | |
60 | uchar drive; /* drive no */ | |
61 | uchar cmdlen; /* cmd length */ | |
62 | uchar cmd[16]; /* cmd desc */ | |
63 | uchar dma; /* if > 0 dma enabled */ | |
64 | uchar result[11];/* status information */ | |
65 | uchar resultlen; /* lenght of result */ | |
66 | } FDC_COMMAND_STRUCT; | |
67 | /* flags: only the lower 8bit used: | |
68 | * bit 0 if set drive 0 is present | |
69 | * bit 1 if set drive 1 is present | |
70 | * bit 2 if set drive 2 is present | |
71 | * bit 3 if set drive 3 is present | |
72 | * bit 4 if set disk in drive 0 is inserted | |
73 | * bit 5 if set disk in drive 1 is inserted | |
74 | * bit 6 if set disk in drive 2 is inserted | |
75 | * bit 7 if set disk in drive 4 is inserted | |
76 | */ | |
77 | ||
78 | ||
79 | /* cmd indexes */ | |
80 | #define COMMAND 0 | |
81 | #define DRIVE 1 | |
82 | #define CONFIG0 1 | |
83 | #define SPEC_HUTSRT 1 | |
84 | #define TRACK 2 | |
85 | #define CONFIG1 2 | |
86 | #define SPEC_HLT 2 | |
87 | #define HEAD 3 | |
88 | #define CONFIG2 3 | |
89 | #define SECTOR 4 | |
90 | #define SECTOR_SIZE 5 | |
91 | #define LAST_TRACK 6 | |
92 | #define GAP 7 | |
93 | #define DTL 8 | |
94 | /* result indexes */ | |
95 | #define STATUS_0 0 | |
96 | #define STATUS_PCN 1 | |
97 | #define STATUS_1 1 | |
98 | #define STATUS_2 2 | |
99 | #define STATUS_TRACK 3 | |
100 | #define STATUS_HEAD 4 | |
101 | #define STATUS_SECT 5 | |
102 | #define STATUS_SECT_SIZE 6 | |
103 | ||
104 | ||
105 | /* Register addresses */ | |
106 | #define FDC_BASE 0x3F0 | |
107 | #define FDC_SRA FDC_BASE + 0 /* Status Register A */ | |
108 | #define FDC_SRB FDC_BASE + 1 /* Status Register B */ | |
109 | #define FDC_DOR FDC_BASE + 2 /* Digital Output Register */ | |
110 | #define FDC_TDR FDC_BASE + 3 /* Tape Drive Register */ | |
111 | #define FDC_DSR FDC_BASE + 4 /* Data rate Register */ | |
112 | #define FDC_MSR FDC_BASE + 4 /* Main Status Register */ | |
113 | #define FDC_FIFO FDC_BASE + 5 /* FIFO */ | |
114 | #define FDC_DIR FDC_BASE + 6 /* Digital Input Register */ | |
115 | #define FDC_CCR FDC_BASE + 7 /* Configuration Control */ | |
116 | /* Commands */ | |
117 | #define FDC_CMD_SENSE_INT 0x08 | |
118 | #define FDC_CMD_CONFIGURE 0x13 | |
119 | #define FDC_CMD_SPECIFY 0x03 | |
120 | #define FDC_CMD_RECALIBRATE 0x07 | |
121 | #define FDC_CMD_READ 0x06 | |
122 | #define FDC_CMD_READ_TRACK 0x02 | |
123 | #define FDC_CMD_READ_ID 0x0A | |
124 | #define FDC_CMD_DUMP_REG 0x0E | |
125 | #define FDC_CMD_SEEK 0x0F | |
126 | ||
127 | #define FDC_CMD_SENSE_INT_LEN 0x01 | |
128 | #define FDC_CMD_CONFIGURE_LEN 0x04 | |
129 | #define FDC_CMD_SPECIFY_LEN 0x03 | |
130 | #define FDC_CMD_RECALIBRATE_LEN 0x02 | |
131 | #define FDC_CMD_READ_LEN 0x09 | |
132 | #define FDC_CMD_READ_TRACK_LEN 0x09 | |
133 | #define FDC_CMD_READ_ID_LEN 0x02 | |
134 | #define FDC_CMD_DUMP_REG_LEN 0x01 | |
135 | #define FDC_CMD_SEEK_LEN 0x03 | |
136 | ||
137 | #define FDC_FIFO_THR 0x0C | |
138 | #define FDC_FIFO_DIS 0x00 | |
139 | #define FDC_IMPLIED_SEEK 0x01 | |
140 | #define FDC_POLL_DIS 0x00 | |
141 | #define FDC_PRE_TRK 0x00 | |
142 | #define FDC_CONFIGURE FDC_FIFO_THR | (FDC_POLL_DIS<<4) | (FDC_FIFO_DIS<<5) | (FDC_IMPLIED_SEEK << 6) | |
143 | #define FDC_MFM_MODE 0x01 /* MFM enable */ | |
144 | #define FDC_SKIP_MODE 0x00 /* skip enable */ | |
145 | ||
146 | #define FDC_TIME_OUT 100000 /* time out */ | |
147 | #define FDC_RW_RETRIES 3 /* read write retries */ | |
148 | #define FDC_CAL_RETRIES 3 /* calibration and seek retries */ | |
149 | ||
150 | ||
151 | /* Disk structure */ | |
152 | typedef struct { | |
153 | unsigned int size; /* nr of sectors total */ | |
154 | unsigned int sect; /* sectors per track */ | |
155 | unsigned int head; /* nr of heads */ | |
156 | unsigned int track; /* nr of tracks */ | |
157 | unsigned int stretch; /* !=0 means double track steps */ | |
158 | unsigned char gap; /* gap1 size */ | |
159 | unsigned char rate; /* data rate. |= 0x40 for perpendicular */ | |
160 | unsigned char spec1; /* stepping rate, head unload time */ | |
161 | unsigned char fmt_gap; /* gap2 size */ | |
162 | unsigned char hlt; /* head load time */ | |
163 | unsigned char sect_code; /* Sector Size code */ | |
164 | const char * name; /* used only for predefined formats */ | |
165 | } FD_GEO_STRUCT; | |
166 | ||
167 | ||
168 | /* supported Floppy types (currently only one) */ | |
169 | const static FD_GEO_STRUCT floppy_type[2] = { | |
170 | { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,16,2,"H1440" }, /* 7 1.44MB 3.5" */ | |
171 | { 0, 0,0, 0,0,0x00,0x00,0x00,0x00, 0,0,NULL }, /* end of table */ | |
172 | }; | |
173 | ||
174 | static FDC_COMMAND_STRUCT cmd; /* global command struct */ | |
175 | ||
176 | /* Supporting Functions */ | |
177 | /* reads a Register of the FDC */ | |
178 | unsigned char read_fdc_reg(unsigned int addr) | |
179 | { | |
180 | volatile unsigned char *val = (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS | addr); | |
181 | return val[0]; | |
182 | } | |
183 | ||
184 | /* writes a Register of the FDC */ | |
185 | void write_fdc_reg(unsigned int addr, unsigned char val) | |
186 | { | |
187 | volatile unsigned char *tmp = (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS | addr); | |
188 | tmp[0]=val; | |
189 | } | |
190 | ||
191 | /* waits for an interrupt (polling) */ | |
192 | int wait_for_fdc_int(void) | |
193 | { | |
194 | unsigned long timeout; | |
195 | timeout = FDC_TIME_OUT; | |
196 | while((read_fdc_reg(FDC_SRA)&0x80)==0) { | |
197 | timeout--; | |
198 | udelay(10); | |
199 | if(timeout==0) /* timeout occured */ | |
200 | return FALSE; | |
201 | } | |
202 | return TRUE; | |
203 | } | |
204 | ||
205 | ||
206 | /* reads a byte from the FIFO of the FDC and checks direction and RQM bit | |
207 | of the MSR. returns -1 if timeout, or byte if ok */ | |
208 | int read_fdc_byte(void) | |
209 | { | |
210 | unsigned long timeout; | |
211 | timeout = FDC_TIME_OUT; | |
212 | while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) { | |
213 | /* direction out and ready */ | |
214 | udelay(10); | |
215 | timeout--; | |
216 | if(timeout==0) /* timeout occured */ | |
217 | return -1; | |
218 | } | |
219 | return read_fdc_reg(FDC_FIFO); | |
220 | } | |
221 | ||
222 | /* if the direction of the FIFO is wrong, this routine is used to | |
223 | empty the FIFO. Should _not_ be used */ | |
224 | int fdc_need_more_output(void) | |
225 | { | |
226 | unsigned char c; | |
227 | while((read_fdc_reg(FDC_MSR)&0xC0)==0xC0) { | |
228 | c=(unsigned char)read_fdc_byte(); | |
229 | printf("Error: more output: %x\n",c); | |
230 | } | |
231 | return TRUE; | |
232 | } | |
233 | ||
234 | ||
235 | /* writes a byte to the FIFO of the FDC and checks direction and RQM bit | |
236 | of the MSR */ | |
237 | int write_fdc_byte(unsigned char val) | |
238 | { | |
239 | unsigned long timeout; | |
240 | timeout = FDC_TIME_OUT; | |
241 | while((read_fdc_reg(FDC_MSR)&0xC0)!=0x80) { | |
242 | /* direction in and ready for byte */ | |
243 | timeout--; | |
244 | udelay(10); | |
245 | fdc_need_more_output(); | |
246 | if(timeout==0) /* timeout occured */ | |
247 | return FALSE; | |
248 | } | |
249 | write_fdc_reg(FDC_FIFO,val); | |
250 | return TRUE; | |
251 | } | |
252 | ||
253 | /* sets up all FDC commands and issues it to the FDC. If | |
254 | the command causes direct results (no Execution Phase) | |
255 | the result is be read as well. */ | |
256 | ||
257 | int fdc_issue_cmd(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG) | |
258 | { | |
259 | int i; | |
260 | unsigned long head,track,sect,timeout; | |
261 | track = pCMD->blnr / (pFG->sect * pFG->head); /* track nr */ | |
262 | sect = pCMD->blnr % (pFG->sect * pFG->head); /* remaining blocks */ | |
263 | head = sect / pFG->sect; /* head nr */ | |
264 | sect = sect % pFG->sect; /* remaining blocks */ | |
265 | sect++; /* sectors are 1 based */ | |
266 | PRINTF("Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",track,head,sect,pCMD->drive,pCMD->blnr); | |
267 | if(head|=0) { /* max heads = 2 */ | |
268 | pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */ | |
269 | pCMD->cmd[HEAD]=(unsigned char) head; /* head register */ | |
270 | } | |
271 | else { | |
272 | pCMD->cmd[DRIVE]=pCMD->drive; /* head 0 */ | |
273 | pCMD->cmd[HEAD]=(unsigned char) head; /* head register */ | |
274 | } | |
275 | pCMD->cmd[TRACK]=(unsigned char) track; /* track */ | |
276 | switch (pCMD->cmd[COMMAND]) { | |
277 | case FDC_CMD_READ: | |
278 | pCMD->cmd[SECTOR]=(unsigned char) sect; /* sector */ | |
279 | pCMD->cmd[SECTOR_SIZE]=pFG->sect_code; /* sector size code */ | |
280 | pCMD->cmd[LAST_TRACK]=pFG->sect; /* End of track */ | |
281 | pCMD->cmd[GAP]=pFG->gap; /* gap */ | |
282 | pCMD->cmd[DTL]=0xFF; /* DTL */ | |
283 | pCMD->cmdlen=FDC_CMD_READ_LEN; | |
284 | pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */ | |
285 | pCMD->cmd[COMMAND]|=(FDC_SKIP_MODE<<5); /* set Skip bit */ | |
286 | pCMD->resultlen=0; /* result only after execution */ | |
287 | break; | |
288 | case FDC_CMD_SEEK: | |
289 | pCMD->cmdlen=FDC_CMD_SEEK_LEN; | |
290 | pCMD->resultlen=0; /* no result */ | |
291 | break; | |
292 | case FDC_CMD_CONFIGURE: | |
293 | pCMD->cmd[CONFIG0]=0; | |
294 | pCMD->cmd[CONFIG1]=FDC_CONFIGURE; /* FIFO Threshold, Poll, Enable FIFO */ | |
295 | pCMD->cmd[CONFIG2]=FDC_PRE_TRK; /* Precompensation Track */ | |
296 | pCMD->cmdlen=FDC_CMD_CONFIGURE_LEN; | |
297 | pCMD->resultlen=0; /* no result */ | |
298 | break; | |
299 | case FDC_CMD_SPECIFY: | |
300 | pCMD->cmd[SPEC_HUTSRT]=pFG->spec1; | |
301 | pCMD->cmd[SPEC_HLT]=(pFG->hlt)<<1; /* head load time */ | |
302 | if(pCMD->dma==0) | |
303 | pCMD->cmd[SPEC_HLT]|=0x1; /* no dma */ | |
304 | pCMD->cmdlen=FDC_CMD_SPECIFY_LEN; | |
305 | pCMD->resultlen=0; /* no result */ | |
306 | break; | |
307 | case FDC_CMD_DUMP_REG: | |
308 | pCMD->cmdlen=FDC_CMD_DUMP_REG_LEN; | |
309 | pCMD->resultlen=10; /* 10 byte result */ | |
310 | break; | |
311 | case FDC_CMD_READ_ID: | |
312 | pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */ | |
313 | pCMD->cmdlen=FDC_CMD_READ_ID_LEN; | |
314 | pCMD->resultlen=7; /* 7 byte result */ | |
315 | break; | |
316 | case FDC_CMD_RECALIBRATE: | |
317 | pCMD->cmd[DRIVE]&=0x03; /* don't set the head bit */ | |
318 | pCMD->cmdlen=FDC_CMD_RECALIBRATE_LEN; | |
319 | pCMD->resultlen=0; /* no result */ | |
320 | break; | |
321 | break; | |
322 | case FDC_CMD_SENSE_INT: | |
323 | pCMD->cmdlen=FDC_CMD_SENSE_INT_LEN; | |
324 | pCMD->resultlen=2; | |
325 | break; | |
326 | } | |
327 | for(i=0;i<pCMD->cmdlen;i++) { | |
328 | /* PRINTF("write cmd%d = 0x%02X\n",i,pCMD->cmd[i]); */ | |
329 | if(write_fdc_byte(pCMD->cmd[i])==FALSE) { | |
330 | PRINTF("Error: timeout while issue cmd%d\n",i); | |
331 | return FALSE; | |
332 | } | |
333 | } | |
334 | timeout=FDC_TIME_OUT; | |
335 | for(i=0;i<pCMD->resultlen;i++) { | |
336 | while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) { | |
337 | timeout--; | |
338 | if(timeout==0) { | |
339 | PRINTF(" timeout while reading result%d MSR=0x%02X\n",i,read_fdc_reg(FDC_MSR)); | |
340 | return FALSE; | |
341 | } | |
342 | } | |
343 | pCMD->result[i]=(unsigned char)read_fdc_byte(); | |
344 | } | |
345 | return TRUE; | |
346 | } | |
347 | ||
348 | /* selects the drive assigned in the cmd structur and | |
349 | switches on the Motor */ | |
350 | void select_fdc_drive(FDC_COMMAND_STRUCT *pCMD) | |
351 | { | |
352 | unsigned char val; | |
353 | ||
354 | val=(1<<(4+pCMD->drive))|pCMD->drive|0xC; /* set reset, dma gate and motor bits */ | |
355 | if((read_fdc_reg(FDC_DOR)&val)!=val) { | |
356 | write_fdc_reg(FDC_DOR,val); | |
357 | for(val=0;val<255;val++) | |
358 | udelay(500); /* wait some time to start motor */ | |
359 | } | |
360 | } | |
361 | ||
362 | /* switches off the Motor of the specified drive */ | |
363 | void stop_fdc_drive(FDC_COMMAND_STRUCT *pCMD) | |
364 | { | |
365 | unsigned char val; | |
366 | ||
367 | val=(1<<(4+pCMD->drive))|pCMD->drive; /* sets motor bits */ | |
368 | write_fdc_reg(FDC_DOR,(read_fdc_reg(FDC_DOR)&~val)); | |
369 | } | |
370 | ||
371 | /* issues a recalibrate command, waits for interrupt and | |
372 | * issues a sense_interrupt */ | |
373 | int fdc_recalibrate(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG) | |
374 | { | |
375 | pCMD->cmd[COMMAND]=FDC_CMD_RECALIBRATE; | |
376 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) | |
377 | return FALSE; | |
378 | while(wait_for_fdc_int()!=TRUE); | |
379 | pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT; | |
380 | return(fdc_issue_cmd(pCMD,pFG)); | |
381 | } | |
382 | ||
383 | /* issues a recalibrate command, waits for interrupt and | |
384 | * issues a sense_interrupt */ | |
385 | int fdc_seek(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG) | |
386 | { | |
387 | pCMD->cmd[COMMAND]=FDC_CMD_SEEK; | |
388 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) | |
389 | return FALSE; | |
390 | while(wait_for_fdc_int()!=TRUE); | |
391 | pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT; | |
392 | return(fdc_issue_cmd(pCMD,pFG)); | |
393 | } | |
394 | ||
395 | ||
396 | /* terminates current command, by not servicing the FIFO | |
397 | * waits for interrupt and fills in the result bytes */ | |
398 | int fdc_terminate(FDC_COMMAND_STRUCT *pCMD) | |
399 | { | |
400 | int i; | |
401 | for(i=0;i<100;i++) | |
402 | udelay(500); /* wait 500usec for fifo overrun */ | |
403 | while((read_fdc_reg(FDC_SRA)&0x80)==0x00); /* wait as long as no int has occured */ | |
404 | for(i=0;i<7;i++) { | |
405 | pCMD->result[i]=(unsigned char)read_fdc_byte(); | |
406 | } | |
407 | return TRUE; | |
408 | } | |
409 | ||
410 | /* reads data from FDC, seek commands are issued automatic */ | |
411 | int fdc_read_data(unsigned char *buffer, unsigned long blocks,FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) | |
412 | { | |
413 | /* first seek to start address */ | |
414 | unsigned long len,lastblk,readblk,i,timeout,ii,offset; | |
415 | unsigned char pcn,c,retriesrw,retriescal; | |
416 | unsigned char *bufferw; /* working buffer */ | |
417 | int sect_size; | |
418 | int flags; | |
419 | ||
420 | flags=disable_interrupts(); /* switch off all Interrupts */ | |
421 | select_fdc_drive(pCMD); /* switch on drive */ | |
422 | sect_size=0x080<<pFG->sect_code; | |
423 | retriesrw=0; | |
424 | retriescal=0; | |
425 | offset=0; | |
426 | if(fdc_seek(pCMD,pFG)==FALSE) { | |
427 | stop_fdc_drive(pCMD); | |
428 | enable_interrupts(); | |
429 | return FALSE; | |
430 | } | |
431 | if((pCMD->result[STATUS_0]&0x20)!=0x20) { | |
432 | printf("Seek error Status: %02X\n",pCMD->result[STATUS_0]); | |
433 | stop_fdc_drive(pCMD); | |
434 | enable_interrupts(); | |
435 | return FALSE; | |
436 | } | |
437 | pcn=pCMD->result[STATUS_PCN]; /* current track */ | |
438 | /* now determine the next seek point */ | |
439 | lastblk=pCMD->blnr + blocks; | |
440 | /* readblk=(pFG->head*pFG->sect)-(pCMD->blnr%(pFG->head*pFG->sect)); */ | |
441 | readblk=pFG->sect-(pCMD->blnr%pFG->sect); | |
442 | PRINTF("1st nr of block possible read %ld start %ld\n",readblk,pCMD->blnr); | |
443 | if(readblk>blocks) /* is end within 1st track */ | |
444 | readblk=blocks; /* yes, correct it */ | |
445 | PRINTF("we read %ld blocks start %ld\n",readblk,pCMD->blnr); | |
446 | bufferw=&buffer[0]; /* setup working buffer */ | |
447 | do { | |
448 | retryrw: | |
449 | len=sect_size * readblk; | |
450 | pCMD->cmd[COMMAND]=FDC_CMD_READ; | |
451 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) { | |
452 | stop_fdc_drive(pCMD); | |
453 | enable_interrupts(); | |
454 | return FALSE; | |
455 | } | |
456 | for (i=0;i<len;i++) { | |
457 | timeout=FDC_TIME_OUT; | |
458 | do { | |
459 | c=read_fdc_reg(FDC_MSR); | |
460 | if((c&0xC0)==0xC0) { | |
461 | bufferw[i]=read_fdc_reg(FDC_FIFO); | |
462 | break; | |
463 | } | |
464 | if((c&0xC0)==0x80) { /* output */ | |
465 | PRINTF("Transfer error transfered: at %ld, MSR=%02X\n",i,c); | |
466 | if(i>6) { | |
467 | for(ii=0;ii<7;ii++) { | |
468 | pCMD->result[ii]=bufferw[(i-7+ii)]; | |
469 | } /* for */ | |
470 | } | |
471 | if(retriesrw++>FDC_RW_RETRIES) { | |
472 | if (retriescal++>FDC_CAL_RETRIES) { | |
473 | stop_fdc_drive(pCMD); | |
474 | enable_interrupts(); | |
475 | return FALSE; | |
476 | } | |
477 | else { | |
478 | PRINTF(" trying to recalibrate Try %d\n",retriescal); | |
479 | if(fdc_recalibrate(pCMD,pFG)==FALSE) { | |
480 | stop_fdc_drive(pCMD); | |
481 | enable_interrupts(); | |
482 | return FALSE; | |
483 | } | |
484 | retriesrw=0; | |
485 | goto retrycal; | |
486 | } /* else >FDC_CAL_RETRIES */ | |
487 | } | |
488 | else { | |
489 | PRINTF("Read retry %d\n",retriesrw); | |
490 | goto retryrw; | |
491 | } /* else >FDC_RW_RETRIES */ | |
492 | }/* if output */ | |
493 | timeout--; | |
494 | }while(TRUE); | |
495 | } /* for len */ | |
496 | /* the last sector of a track or all data has been read, | |
497 | * we need to get the results */ | |
498 | fdc_terminate(pCMD); | |
499 | offset+=(sect_size*readblk); /* set up buffer pointer */ | |
500 | bufferw=&buffer[offset]; | |
501 | pCMD->blnr+=readblk; /* update current block nr */ | |
502 | blocks-=readblk; /* update blocks */ | |
503 | if(blocks==0) | |
504 | break; /* we are finish */ | |
505 | /* setup new read blocks */ | |
506 | /* readblk=pFG->head*pFG->sect; */ | |
507 | readblk=pFG->sect; | |
508 | if(readblk>blocks) | |
509 | readblk=blocks; | |
510 | retrycal: | |
511 | /* a seek is necessary */ | |
512 | if(fdc_seek(pCMD,pFG)==FALSE) { | |
513 | stop_fdc_drive(pCMD); | |
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 | pcn=pCMD->result[STATUS_PCN]; /* current track */ | |
523 | }while(TRUE); /* start over */ | |
524 | stop_fdc_drive(pCMD); /* switch off drive */ | |
525 | enable_interrupts(); | |
526 | return TRUE; | |
527 | } | |
528 | ||
529 | /* Scan all drives and check if drive is present and disk is inserted */ | |
530 | int fdc_check_drive(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) | |
531 | { | |
532 | int i,drives,state; | |
533 | /* OK procedure of data book is satisfied. | |
534 | * trying to get some information over the drives */ | |
535 | state=0; /* no drives, no disks */ | |
536 | for(drives=0;drives<4;drives++) { | |
537 | pCMD->drive=drives; | |
538 | select_fdc_drive(pCMD); | |
539 | pCMD->blnr=0; /* set to the 1st block */ | |
540 | if(fdc_recalibrate(pCMD,pFG)==FALSE) | |
541 | break; | |
542 | if((pCMD->result[STATUS_0]&0x10)==0x10) | |
543 | break; | |
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 | break; | |
549 | pCMD->blnr=0; /* set to the 1st block */ | |
550 | if(fdc_recalibrate(pCMD,pFG)==FALSE) | |
551 | break; | |
552 | pCMD->cmd[COMMAND]=FDC_CMD_READ_ID; | |
553 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) | |
554 | break; | |
555 | state|=(0x10<<drives); | |
556 | } | |
557 | stop_fdc_drive(pCMD); | |
558 | for(i=0;i<4;i++) { | |
559 | PRINTF("Floppy Drive %d %sconnected %sDisk inserted %s\n",i, | |
560 | ((state&(1<<i))==(1<<i)) ? "":"not ", | |
561 | ((state&(0x10<<i))==(0x10<<i)) ? "":"no ", | |
562 | ((state&(0x10<<i))==(0x10<<i)) ? pFG->name : ""); | |
563 | } | |
564 | pCMD->flags=state; | |
565 | return TRUE; | |
566 | } | |
567 | ||
568 | ||
569 | /************************************************************************** | |
570 | * int fdc_setup | |
571 | * setup the fdc according the datasheet | |
572 | * assuming in PS2 Mode | |
573 | */ | |
574 | int fdc_setup(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) | |
575 | { | |
576 | ||
577 | int i; | |
578 | /* first, we reset the FDC via the DOR */ | |
579 | write_fdc_reg(FDC_DOR,0x00); | |
580 | for(i=0; i<255; i++) /* then we wait some time */ | |
581 | udelay(500); | |
582 | /* then, we clear the reset in the DOR */ | |
583 | pCMD->drive=0; | |
584 | select_fdc_drive(pCMD); | |
585 | /* initialize the CCR */ | |
586 | write_fdc_reg(FDC_CCR,pFG->rate); | |
587 | /* then initialize the DSR */ | |
588 | write_fdc_reg(FDC_DSR,pFG->rate); | |
589 | if(wait_for_fdc_int()==FALSE) { | |
590 | PRINTF("Time Out after writing CCR\n"); | |
591 | return FALSE; | |
592 | } | |
593 | /* now issue sense Interrupt and status command | |
594 | * assuming only one drive present (drive 0) */ | |
595 | pCMD->dma=0; /* we don't use any dma at all */ | |
596 | for(i=0;i<4;i++) { | |
597 | /* issue sense interrupt for all 4 possible drives */ | |
598 | pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT; | |
599 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) { | |
600 | PRINTF("Sense Interrupt for drive %d failed\n",i); | |
601 | } | |
602 | } | |
603 | /* assuming drive 0 for rest of configuration | |
604 | * issue the configure command */ | |
605 | pCMD->drive=0; | |
606 | select_fdc_drive(pCMD); | |
607 | pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE; | |
608 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) { | |
609 | PRINTF(" configure timeout\n"); | |
610 | stop_fdc_drive(pCMD); | |
611 | return FALSE; | |
612 | } | |
613 | /* issue specify command */ | |
614 | pCMD->cmd[COMMAND]=FDC_CMD_SPECIFY; | |
615 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) { | |
616 | PRINTF(" specify timeout\n"); | |
617 | stop_fdc_drive(pCMD); | |
618 | return FALSE; | |
619 | ||
620 | } | |
621 | /* then, we clear the reset in the DOR */ | |
622 | /* fdc_check_drive(pCMD,pFG); */ | |
623 | /* write_fdc_reg(FDC_DOR,0x04); */ | |
624 | return TRUE; | |
625 | } | |
626 | ||
627 | /**************************************************************************** | |
628 | * main routine do_fdcboot | |
629 | */ | |
630 | int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
631 | { | |
632 | FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type; | |
633 | FDC_COMMAND_STRUCT *pCMD = &cmd; | |
634 | unsigned long addr,imsize; | |
635 | image_header_t *hdr; /* used for fdc boot */ | |
636 | unsigned char boot_drive; | |
637 | int i,nrofblk; | |
638 | char *ep; | |
639 | int rcode = 0; | |
640 | ||
641 | switch (argc) { | |
642 | case 1: | |
643 | addr = CFG_LOAD_ADDR; | |
644 | boot_drive=0; /* default boot from drive 0 */ | |
645 | break; | |
646 | case 2: | |
647 | addr = simple_strtoul(argv[1], NULL, 16); | |
648 | boot_drive=0; /* default boot from drive 0 */ | |
649 | break; | |
650 | case 3: | |
651 | addr = simple_strtoul(argv[1], NULL, 16); | |
652 | boot_drive=simple_strtoul(argv[2], NULL, 10); | |
653 | break; | |
654 | default: | |
655 | printf ("Usage:\n%s\n", cmdtp->usage); | |
656 | return 1; | |
657 | } | |
658 | /* setup FDC and scan for drives */ | |
659 | if(fdc_setup(pCMD,pFG)==FALSE) { | |
660 | printf("\n** Error in setup FDC **\n"); | |
661 | return 1; | |
662 | } | |
663 | if(fdc_check_drive(pCMD,pFG)==FALSE) { | |
664 | printf("\n** Error in check_drives **\n"); | |
665 | return 1; | |
666 | } | |
667 | if((pCMD->flags&(1<<boot_drive))==0) { | |
668 | /* drive not available */ | |
669 | printf("\n** Drive %d not availabe **\n",boot_drive); | |
670 | return 1; | |
671 | } | |
672 | if((pCMD->flags&(0x10<<boot_drive))==0) { | |
673 | /* no disk inserted */ | |
674 | printf("\n** No disk inserted in drive %d **\n",boot_drive); | |
675 | return 1; | |
676 | } | |
677 | /* ok, we have a valid source */ | |
678 | pCMD->drive=boot_drive; | |
679 | /* read first block */ | |
680 | pCMD->blnr=0; | |
681 | if(fdc_read_data((unsigned char *)addr,1,pCMD,pFG)==FALSE) { | |
682 | printf("\nRead error:"); | |
683 | for(i=0;i<7;i++) | |
684 | printf("result%d: 0x%02X\n",i,pCMD->result[i]); | |
685 | return 1; | |
686 | } | |
687 | hdr = (image_header_t *)addr; | |
688 | if (hdr->ih_magic != IH_MAGIC) { | |
689 | printf ("Bad Magic Number\n"); | |
690 | return 1; | |
691 | } | |
692 | print_image_hdr(hdr); | |
693 | ||
694 | imsize= hdr->ih_size+sizeof(image_header_t); | |
695 | nrofblk=imsize/512; | |
696 | if((imsize%512)>0) | |
697 | nrofblk++; | |
698 | printf("Loading %ld Bytes (%d blocks) at 0x%08lx..\n",imsize,nrofblk,addr); | |
699 | pCMD->blnr=0; | |
700 | if(fdc_read_data((unsigned char *)addr,nrofblk,pCMD,pFG)==FALSE) { | |
701 | /* read image block */ | |
702 | printf("\nRead error:"); | |
703 | for(i=0;i<7;i++) | |
704 | printf("result%d: 0x%02X\n",i,pCMD->result[i]); | |
705 | return 1; | |
706 | } | |
707 | printf("OK %ld Bytes loaded.\n",imsize); | |
708 | ||
709 | flush_cache (addr, imsize); | |
710 | /* Loading ok, update default load address */ | |
711 | ||
712 | load_addr = addr; | |
713 | if(hdr->ih_type == IH_TYPE_KERNEL) { | |
714 | /* Check if we should attempt an auto-start */ | |
715 | if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) { | |
716 | char *local_args[2]; | |
717 | extern int do_bootm (cmd_tbl_t *, int, int, char *[]); | |
718 | ||
719 | local_args[0] = argv[0]; | |
720 | local_args[1] = NULL; | |
721 | ||
722 | printf ("Automatic boot of image at addr 0x%08lX ...\n", addr); | |
723 | ||
724 | do_bootm (cmdtp, 0, 1, local_args); | |
725 | rcode ++; | |
726 | } | |
727 | } | |
728 | return rcode; | |
729 | } | |
730 | ||
731 | ||
732 | ||
733 | #endif /* CONFIG_COMMANDS & CFG_CMD_FDC */ | |
734 | ||
735 |