]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * (C) Copyright 2001 | |
3 | * Denis Peter, MPL AG, d.peter@mpl.ch. | |
4 | * | |
5 | * SPDX-License-Identifier: GPL-2.0+ | |
6 | */ | |
7 | /* | |
8 | * Floppy Disk support | |
9 | */ | |
10 | ||
11 | #include <common.h> | |
12 | #include <config.h> | |
13 | #include <command.h> | |
14 | #include <image.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 */ | |
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 */ | |
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) */ | |
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 */ | |
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 */ | |
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 */ | |
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 | ||
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 */ | |
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 */ | |
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 */ | |
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 */ | |
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 */ | |
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 */ | |
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 */ | |
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 | */ | |
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 | */ | |
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_IMAGE_FORMAT_LEGACY) | |
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_IMAGE_FORMAT_LEGACY) | |
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 | ); |