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Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
wdenk38635852002-08-27 05:55:31 +00002/*
3 * (C) Copyright 2001
4 * Denis Peter, MPL AG, d.peter@mpl.ch.
wdenk38635852002-08-27 05:55:31 +00005 */
6/*
7 * Floppy Disk support
8 */
9
10#include <common.h>
11#include <config.h>
12#include <command.h>
13#include <image.h>
14
15
16#undef FDC_DEBUG
17
18#ifdef FDC_DEBUG
19#define PRINTF(fmt,args...) printf (fmt ,##args)
20#else
21#define PRINTF(fmt,args...)
22#endif
23
Jon Loeligerbaa26db2007-07-08 17:51:39 -050024/*#if defined(CONFIG_CMD_DATE) */
wdenk8bde7f72003-06-27 21:31:46 +000025/*#include <rtc.h> */
26/*#endif */
wdenk38635852002-08-27 05:55:31 +000027
wdenk38635852002-08-27 05:55:31 +000028typedef struct {
Wolfgang Denk53677ef2008-05-20 16:00:29 +020029 int flags; /* connected drives ect */
30 unsigned long blnr; /* Logical block nr */
31 uchar drive; /* drive no */
32 uchar cmdlen; /* cmd length */
33 uchar cmd[16]; /* cmd desc */
34 uchar dma; /* if > 0 dma enabled */
35 uchar result[11]; /* status information */
36 uchar resultlen; /* lenght of result */
wdenk38635852002-08-27 05:55:31 +000037} FDC_COMMAND_STRUCT;
Wolfgang Denk53677ef2008-05-20 16:00:29 +020038
wdenk38635852002-08-27 05:55:31 +000039/* flags: only the lower 8bit used:
40 * bit 0 if set drive 0 is present
41 * bit 1 if set drive 1 is present
42 * bit 2 if set drive 2 is present
43 * bit 3 if set drive 3 is present
44 * bit 4 if set disk in drive 0 is inserted
45 * bit 5 if set disk in drive 1 is inserted
46 * bit 6 if set disk in drive 2 is inserted
47 * bit 7 if set disk in drive 4 is inserted
48 */
49
wdenk38635852002-08-27 05:55:31 +000050/* cmd indexes */
Wolfgang Denk53677ef2008-05-20 16:00:29 +020051#define COMMAND 0
52#define DRIVE 1
wdenk38635852002-08-27 05:55:31 +000053#define CONFIG0 1
Wolfgang Denk53677ef2008-05-20 16:00:29 +020054#define SPEC_HUTSRT 1
55#define TRACK 2
wdenk38635852002-08-27 05:55:31 +000056#define CONFIG1 2
57#define SPEC_HLT 2
Wolfgang Denk53677ef2008-05-20 16:00:29 +020058#define HEAD 3
wdenk38635852002-08-27 05:55:31 +000059#define CONFIG2 3
Wolfgang Denk53677ef2008-05-20 16:00:29 +020060#define SECTOR 4
61#define SECTOR_SIZE 5
62#define LAST_TRACK 6
63#define GAP 7
64#define DTL 8
wdenk38635852002-08-27 05:55:31 +000065/* result indexes */
Wolfgang Denk53677ef2008-05-20 16:00:29 +020066#define STATUS_0 0
67#define STATUS_PCN 1
68#define STATUS_1 1
69#define STATUS_2 2
70#define STATUS_TRACK 3
71#define STATUS_HEAD 4
72#define STATUS_SECT 5
73#define STATUS_SECT_SIZE 6
wdenk38635852002-08-27 05:55:31 +000074
75
76/* Register addresses */
77#define FDC_BASE 0x3F0
78#define FDC_SRA FDC_BASE + 0 /* Status Register A */
79#define FDC_SRB FDC_BASE + 1 /* Status Register B */
80#define FDC_DOR FDC_BASE + 2 /* Digital Output Register */
81#define FDC_TDR FDC_BASE + 3 /* Tape Drive Register */
82#define FDC_DSR FDC_BASE + 4 /* Data rate Register */
83#define FDC_MSR FDC_BASE + 4 /* Main Status Register */
84#define FDC_FIFO FDC_BASE + 5 /* FIFO */
85#define FDC_DIR FDC_BASE + 6 /* Digital Input Register */
86#define FDC_CCR FDC_BASE + 7 /* Configuration Control */
87/* Commands */
Wolfgang Denk53677ef2008-05-20 16:00:29 +020088#define FDC_CMD_SENSE_INT 0x08
89#define FDC_CMD_CONFIGURE 0x13
90#define FDC_CMD_SPECIFY 0x03
91#define FDC_CMD_RECALIBRATE 0x07
92#define FDC_CMD_READ 0x06
93#define FDC_CMD_READ_TRACK 0x02
94#define FDC_CMD_READ_ID 0x0A
95#define FDC_CMD_DUMP_REG 0x0E
96#define FDC_CMD_SEEK 0x0F
wdenk38635852002-08-27 05:55:31 +000097
Wolfgang Denk53677ef2008-05-20 16:00:29 +020098#define FDC_CMD_SENSE_INT_LEN 0x01
99#define FDC_CMD_CONFIGURE_LEN 0x04
100#define FDC_CMD_SPECIFY_LEN 0x03
101#define FDC_CMD_RECALIBRATE_LEN 0x02
102#define FDC_CMD_READ_LEN 0x09
103#define FDC_CMD_READ_TRACK_LEN 0x09
104#define FDC_CMD_READ_ID_LEN 0x02
105#define FDC_CMD_DUMP_REG_LEN 0x01
106#define FDC_CMD_SEEK_LEN 0x03
wdenk38635852002-08-27 05:55:31 +0000107
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200108#define FDC_FIFO_THR 0x0C
109#define FDC_FIFO_DIS 0x00
wdenk38635852002-08-27 05:55:31 +0000110#define FDC_IMPLIED_SEEK 0x01
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200111#define FDC_POLL_DIS 0x00
112#define FDC_PRE_TRK 0x00
113#define FDC_CONFIGURE FDC_FIFO_THR | (FDC_POLL_DIS<<4) | (FDC_FIFO_DIS<<5) | (FDC_IMPLIED_SEEK << 6)
114#define FDC_MFM_MODE 0x01 /* MFM enable */
115#define FDC_SKIP_MODE 0x00 /* skip enable */
wdenk38635852002-08-27 05:55:31 +0000116
117#define FDC_TIME_OUT 100000 /* time out */
118#define FDC_RW_RETRIES 3 /* read write retries */
119#define FDC_CAL_RETRIES 3 /* calibration and seek retries */
120
121
122/* Disk structure */
123typedef struct {
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200124 unsigned int size; /* nr of sectors total */
125 unsigned int sect; /* sectors per track */
126 unsigned int head; /* nr of heads */
127 unsigned int track; /* nr of tracks */
128 unsigned int stretch; /* !=0 means double track steps */
129 unsigned char gap; /* gap1 size */
130 unsigned char rate; /* data rate. |= 0x40 for perpendicular */
131 unsigned char spec1; /* stepping rate, head unload time */
132 unsigned char fmt_gap;/* gap2 size */
133 unsigned char hlt; /* head load time */
134 unsigned char sect_code;/* Sector Size code */
135 const char * name; /* used only for predefined formats */
wdenk38635852002-08-27 05:55:31 +0000136} FD_GEO_STRUCT;
137
138
139/* supported Floppy types (currently only one) */
140const static FD_GEO_STRUCT floppy_type[2] = {
141 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,16,2,"H1440" }, /* 7 1.44MB 3.5" */
142 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00, 0,0,NULL }, /* end of table */
143};
144
145static FDC_COMMAND_STRUCT cmd; /* global command struct */
146
wdenk7f6c2cb2002-11-10 22:06:23 +0000147/* If the boot drive number is undefined, we assume it's drive 0 */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200148#ifndef CONFIG_SYS_FDC_DRIVE_NUMBER
149#define CONFIG_SYS_FDC_DRIVE_NUMBER 0
wdenk7f6c2cb2002-11-10 22:06:23 +0000150#endif
151
152/* Hardware access */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200153#ifndef CONFIG_SYS_ISA_IO_STRIDE
154#define CONFIG_SYS_ISA_IO_STRIDE 1
wdenk7f6c2cb2002-11-10 22:06:23 +0000155#endif
156
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200157#ifndef CONFIG_SYS_ISA_IO_OFFSET
158#define CONFIG_SYS_ISA_IO_OFFSET 0
wdenk7f6c2cb2002-11-10 22:06:23 +0000159#endif
160
wdenk38635852002-08-27 05:55:31 +0000161/* Supporting Functions */
162/* reads a Register of the FDC */
163unsigned char read_fdc_reg(unsigned int addr)
164{
wdenk2262cfe2002-11-18 00:14:45 +0000165 volatile unsigned char *val =
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200166 (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
167 (addr * CONFIG_SYS_ISA_IO_STRIDE) +
168 CONFIG_SYS_ISA_IO_OFFSET);
wdenk8bde7f72003-06-27 21:31:46 +0000169
wdenk7f6c2cb2002-11-10 22:06:23 +0000170 return val [0];
wdenk38635852002-08-27 05:55:31 +0000171}
172
173/* writes a Register of the FDC */
174void write_fdc_reg(unsigned int addr, unsigned char val)
175{
wdenk8bde7f72003-06-27 21:31:46 +0000176 volatile unsigned char *tmp =
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200177 (volatile unsigned char *)(CONFIG_SYS_ISA_IO_BASE_ADDRESS +
178 (addr * CONFIG_SYS_ISA_IO_STRIDE) +
179 CONFIG_SYS_ISA_IO_OFFSET);
wdenk7f6c2cb2002-11-10 22:06:23 +0000180 tmp[0]=val;
wdenk38635852002-08-27 05:55:31 +0000181}
182
183/* waits for an interrupt (polling) */
184int wait_for_fdc_int(void)
185{
186 unsigned long timeout;
187 timeout = FDC_TIME_OUT;
188 while((read_fdc_reg(FDC_SRA)&0x80)==0) {
189 timeout--;
190 udelay(10);
Vagrant Cascadianeae4b2b2016-04-30 19:18:00 -0700191 if(timeout==0) /* timeout occurred */
York Sun472d5462013-04-01 11:29:11 -0700192 return false;
wdenk38635852002-08-27 05:55:31 +0000193 }
York Sun472d5462013-04-01 11:29:11 -0700194 return true;
wdenk38635852002-08-27 05:55:31 +0000195}
196
wdenk38635852002-08-27 05:55:31 +0000197/* reads a byte from the FIFO of the FDC and checks direction and RQM bit
198 of the MSR. returns -1 if timeout, or byte if ok */
199int read_fdc_byte(void)
200{
201 unsigned long timeout;
202 timeout = FDC_TIME_OUT;
203 while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
204 /* direction out and ready */
205 udelay(10);
206 timeout--;
Vagrant Cascadianeae4b2b2016-04-30 19:18:00 -0700207 if(timeout==0) /* timeout occurred */
wdenk38635852002-08-27 05:55:31 +0000208 return -1;
209 }
210 return read_fdc_reg(FDC_FIFO);
211}
212
213/* if the direction of the FIFO is wrong, this routine is used to
214 empty the FIFO. Should _not_ be used */
215int fdc_need_more_output(void)
216{
217 unsigned char c;
218 while((read_fdc_reg(FDC_MSR)&0xC0)==0xC0) {
219 c=(unsigned char)read_fdc_byte();
220 printf("Error: more output: %x\n",c);
221 }
York Sun472d5462013-04-01 11:29:11 -0700222 return true;
wdenk38635852002-08-27 05:55:31 +0000223}
224
225
226/* writes a byte to the FIFO of the FDC and checks direction and RQM bit
227 of the MSR */
228int write_fdc_byte(unsigned char val)
229{
230 unsigned long timeout;
231 timeout = FDC_TIME_OUT;
232 while((read_fdc_reg(FDC_MSR)&0xC0)!=0x80) {
233 /* direction in and ready for byte */
234 timeout--;
235 udelay(10);
236 fdc_need_more_output();
Vagrant Cascadianeae4b2b2016-04-30 19:18:00 -0700237 if(timeout==0) /* timeout occurred */
York Sun472d5462013-04-01 11:29:11 -0700238 return false;
wdenk38635852002-08-27 05:55:31 +0000239 }
240 write_fdc_reg(FDC_FIFO,val);
York Sun472d5462013-04-01 11:29:11 -0700241 return true;
wdenk38635852002-08-27 05:55:31 +0000242}
243
244/* sets up all FDC commands and issues it to the FDC. If
245 the command causes direct results (no Execution Phase)
246 the result is be read as well. */
247
248int fdc_issue_cmd(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
249{
250 int i;
251 unsigned long head,track,sect,timeout;
252 track = pCMD->blnr / (pFG->sect * pFG->head); /* track nr */
253 sect = pCMD->blnr % (pFG->sect * pFG->head); /* remaining blocks */
254 head = sect / pFG->sect; /* head nr */
255 sect = sect % pFG->sect; /* remaining blocks */
256 sect++; /* sectors are 1 based */
wdenk2262cfe2002-11-18 00:14:45 +0000257 PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",
258 pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr);
wdenk7f6c2cb2002-11-10 22:06:23 +0000259
wdenk38635852002-08-27 05:55:31 +0000260 if(head|=0) { /* max heads = 2 */
261 pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */
262 pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
263 }
264 else {
265 pCMD->cmd[DRIVE]=pCMD->drive; /* head 0 */
266 pCMD->cmd[HEAD]=(unsigned char) head; /* head register */
267 }
268 pCMD->cmd[TRACK]=(unsigned char) track; /* track */
269 switch (pCMD->cmd[COMMAND]) {
270 case FDC_CMD_READ:
271 pCMD->cmd[SECTOR]=(unsigned char) sect; /* sector */
272 pCMD->cmd[SECTOR_SIZE]=pFG->sect_code; /* sector size code */
273 pCMD->cmd[LAST_TRACK]=pFG->sect; /* End of track */
274 pCMD->cmd[GAP]=pFG->gap; /* gap */
275 pCMD->cmd[DTL]=0xFF; /* DTL */
276 pCMD->cmdlen=FDC_CMD_READ_LEN;
277 pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
278 pCMD->cmd[COMMAND]|=(FDC_SKIP_MODE<<5); /* set Skip bit */
279 pCMD->resultlen=0; /* result only after execution */
280 break;
281 case FDC_CMD_SEEK:
282 pCMD->cmdlen=FDC_CMD_SEEK_LEN;
283 pCMD->resultlen=0; /* no result */
284 break;
285 case FDC_CMD_CONFIGURE:
286 pCMD->cmd[CONFIG0]=0;
287 pCMD->cmd[CONFIG1]=FDC_CONFIGURE; /* FIFO Threshold, Poll, Enable FIFO */
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200288 pCMD->cmd[CONFIG2]=FDC_PRE_TRK; /* Precompensation Track */
wdenk38635852002-08-27 05:55:31 +0000289 pCMD->cmdlen=FDC_CMD_CONFIGURE_LEN;
290 pCMD->resultlen=0; /* no result */
291 break;
292 case FDC_CMD_SPECIFY:
293 pCMD->cmd[SPEC_HUTSRT]=pFG->spec1;
294 pCMD->cmd[SPEC_HLT]=(pFG->hlt)<<1; /* head load time */
295 if(pCMD->dma==0)
296 pCMD->cmd[SPEC_HLT]|=0x1; /* no dma */
297 pCMD->cmdlen=FDC_CMD_SPECIFY_LEN;
298 pCMD->resultlen=0; /* no result */
299 break;
300 case FDC_CMD_DUMP_REG:
301 pCMD->cmdlen=FDC_CMD_DUMP_REG_LEN;
302 pCMD->resultlen=10; /* 10 byte result */
303 break;
304 case FDC_CMD_READ_ID:
305 pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */
306 pCMD->cmdlen=FDC_CMD_READ_ID_LEN;
307 pCMD->resultlen=7; /* 7 byte result */
308 break;
309 case FDC_CMD_RECALIBRATE:
310 pCMD->cmd[DRIVE]&=0x03; /* don't set the head bit */
311 pCMD->cmdlen=FDC_CMD_RECALIBRATE_LEN;
312 pCMD->resultlen=0; /* no result */
313 break;
314 break;
315 case FDC_CMD_SENSE_INT:
316 pCMD->cmdlen=FDC_CMD_SENSE_INT_LEN;
317 pCMD->resultlen=2;
318 break;
319 }
320 for(i=0;i<pCMD->cmdlen;i++) {
321 /* PRINTF("write cmd%d = 0x%02X\n",i,pCMD->cmd[i]); */
York Sun472d5462013-04-01 11:29:11 -0700322 if (write_fdc_byte(pCMD->cmd[i]) == false) {
wdenk38635852002-08-27 05:55:31 +0000323 PRINTF("Error: timeout while issue cmd%d\n",i);
York Sun472d5462013-04-01 11:29:11 -0700324 return false;
wdenk38635852002-08-27 05:55:31 +0000325 }
326 }
327 timeout=FDC_TIME_OUT;
328 for(i=0;i<pCMD->resultlen;i++) {
329 while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) {
330 timeout--;
331 if(timeout==0) {
332 PRINTF(" timeout while reading result%d MSR=0x%02X\n",i,read_fdc_reg(FDC_MSR));
York Sun472d5462013-04-01 11:29:11 -0700333 return false;
wdenk38635852002-08-27 05:55:31 +0000334 }
335 }
336 pCMD->result[i]=(unsigned char)read_fdc_byte();
337 }
York Sun472d5462013-04-01 11:29:11 -0700338 return true;
wdenk38635852002-08-27 05:55:31 +0000339}
340
341/* selects the drive assigned in the cmd structur and
342 switches on the Motor */
343void select_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
344{
345 unsigned char val;
346
347 val=(1<<(4+pCMD->drive))|pCMD->drive|0xC; /* set reset, dma gate and motor bits */
348 if((read_fdc_reg(FDC_DOR)&val)!=val) {
349 write_fdc_reg(FDC_DOR,val);
350 for(val=0;val<255;val++)
351 udelay(500); /* wait some time to start motor */
352 }
353}
354
355/* switches off the Motor of the specified drive */
356void stop_fdc_drive(FDC_COMMAND_STRUCT *pCMD)
357{
358 unsigned char val;
359
360 val=(1<<(4+pCMD->drive))|pCMD->drive; /* sets motor bits */
361 write_fdc_reg(FDC_DOR,(read_fdc_reg(FDC_DOR)&~val));
362}
363
364/* issues a recalibrate command, waits for interrupt and
365 * issues a sense_interrupt */
366int fdc_recalibrate(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
367{
368 pCMD->cmd[COMMAND]=FDC_CMD_RECALIBRATE;
York Sun472d5462013-04-01 11:29:11 -0700369 if (fdc_issue_cmd(pCMD, pFG) == false)
370 return false;
371 while (wait_for_fdc_int() != true);
372
wdenk38635852002-08-27 05:55:31 +0000373 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
374 return(fdc_issue_cmd(pCMD,pFG));
375}
376
377/* issues a recalibrate command, waits for interrupt and
378 * issues a sense_interrupt */
379int fdc_seek(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG)
380{
381 pCMD->cmd[COMMAND]=FDC_CMD_SEEK;
York Sun472d5462013-04-01 11:29:11 -0700382 if (fdc_issue_cmd(pCMD, pFG) == false)
383 return false;
384 while (wait_for_fdc_int() != true);
385
wdenk38635852002-08-27 05:55:31 +0000386 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
387 return(fdc_issue_cmd(pCMD,pFG));
388}
389
wdenk38635852002-08-27 05:55:31 +0000390/* terminates current command, by not servicing the FIFO
391 * waits for interrupt and fills in the result bytes */
392int fdc_terminate(FDC_COMMAND_STRUCT *pCMD)
393{
394 int i;
395 for(i=0;i<100;i++)
396 udelay(500); /* wait 500usec for fifo overrun */
Vagrant Cascadianeae4b2b2016-04-30 19:18:00 -0700397 while((read_fdc_reg(FDC_SRA)&0x80)==0x00); /* wait as long as no int has occurred */
wdenk38635852002-08-27 05:55:31 +0000398 for(i=0;i<7;i++) {
399 pCMD->result[i]=(unsigned char)read_fdc_byte();
400 }
York Sun472d5462013-04-01 11:29:11 -0700401 return true;
wdenk38635852002-08-27 05:55:31 +0000402}
403
404/* reads data from FDC, seek commands are issued automatic */
405int fdc_read_data(unsigned char *buffer, unsigned long blocks,FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
406{
407 /* first seek to start address */
Wolfgang Denk4ec6e4a2011-11-09 09:29:02 +0000408 unsigned long len,readblk,i,timeout,ii,offset;
409 unsigned char c,retriesrw,retriescal;
wdenk38635852002-08-27 05:55:31 +0000410 unsigned char *bufferw; /* working buffer */
411 int sect_size;
412 int flags;
413
414 flags=disable_interrupts(); /* switch off all Interrupts */
415 select_fdc_drive(pCMD); /* switch on drive */
416 sect_size=0x080<<pFG->sect_code;
417 retriesrw=0;
418 retriescal=0;
419 offset=0;
York Sun472d5462013-04-01 11:29:11 -0700420 if (fdc_seek(pCMD, pFG) == false) {
wdenk38635852002-08-27 05:55:31 +0000421 stop_fdc_drive(pCMD);
Wolfgang Denk4ec6e4a2011-11-09 09:29:02 +0000422 if (flags)
423 enable_interrupts();
York Sun472d5462013-04-01 11:29:11 -0700424 return false;
wdenk38635852002-08-27 05:55:31 +0000425 }
426 if((pCMD->result[STATUS_0]&0x20)!=0x20) {
427 printf("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
428 stop_fdc_drive(pCMD);
Wolfgang Denk4ec6e4a2011-11-09 09:29:02 +0000429 if (flags)
430 enable_interrupts();
York Sun472d5462013-04-01 11:29:11 -0700431 return false;
wdenk38635852002-08-27 05:55:31 +0000432 }
wdenk38635852002-08-27 05:55:31 +0000433 /* now determine the next seek point */
Wolfgang Denk4ec6e4a2011-11-09 09:29:02 +0000434 /* lastblk=pCMD->blnr + blocks; */
wdenk38635852002-08-27 05:55:31 +0000435 /* readblk=(pFG->head*pFG->sect)-(pCMD->blnr%(pFG->head*pFG->sect)); */
436 readblk=pFG->sect-(pCMD->blnr%pFG->sect);
437 PRINTF("1st nr of block possible read %ld start %ld\n",readblk,pCMD->blnr);
438 if(readblk>blocks) /* is end within 1st track */
439 readblk=blocks; /* yes, correct it */
440 PRINTF("we read %ld blocks start %ld\n",readblk,pCMD->blnr);
Wolfgang Denkd0ff51b2008-07-14 15:19:07 +0200441 bufferw = &buffer[0]; /* setup working buffer */
wdenk38635852002-08-27 05:55:31 +0000442 do {
443retryrw:
444 len=sect_size * readblk;
445 pCMD->cmd[COMMAND]=FDC_CMD_READ;
York Sun472d5462013-04-01 11:29:11 -0700446 if (fdc_issue_cmd(pCMD, pFG) == false) {
wdenk38635852002-08-27 05:55:31 +0000447 stop_fdc_drive(pCMD);
Wolfgang Denk4ec6e4a2011-11-09 09:29:02 +0000448 if (flags)
449 enable_interrupts();
York Sun472d5462013-04-01 11:29:11 -0700450 return false;
wdenk38635852002-08-27 05:55:31 +0000451 }
452 for (i=0;i<len;i++) {
453 timeout=FDC_TIME_OUT;
454 do {
455 c=read_fdc_reg(FDC_MSR);
456 if((c&0xC0)==0xC0) {
457 bufferw[i]=read_fdc_reg(FDC_FIFO);
458 break;
459 }
460 if((c&0xC0)==0x80) { /* output */
Vagrant Cascadiana6f70a32016-03-15 12:16:39 -0700461 PRINTF("Transfer error transferred: at %ld, MSR=%02X\n",i,c);
wdenk38635852002-08-27 05:55:31 +0000462 if(i>6) {
463 for(ii=0;ii<7;ii++) {
464 pCMD->result[ii]=bufferw[(i-7+ii)];
465 } /* for */
466 }
467 if(retriesrw++>FDC_RW_RETRIES) {
468 if (retriescal++>FDC_CAL_RETRIES) {
469 stop_fdc_drive(pCMD);
Wolfgang Denk4ec6e4a2011-11-09 09:29:02 +0000470 if (flags)
471 enable_interrupts();
York Sun472d5462013-04-01 11:29:11 -0700472 return false;
wdenk38635852002-08-27 05:55:31 +0000473 }
474 else {
475 PRINTF(" trying to recalibrate Try %d\n",retriescal);
York Sun472d5462013-04-01 11:29:11 -0700476 if (fdc_recalibrate(pCMD, pFG) == false) {
wdenk38635852002-08-27 05:55:31 +0000477 stop_fdc_drive(pCMD);
Wolfgang Denk4ec6e4a2011-11-09 09:29:02 +0000478 if (flags)
479 enable_interrupts();
York Sun472d5462013-04-01 11:29:11 -0700480 return false;
wdenk38635852002-08-27 05:55:31 +0000481 }
482 retriesrw=0;
483 goto retrycal;
484 } /* else >FDC_CAL_RETRIES */
485 }
486 else {
487 PRINTF("Read retry %d\n",retriesrw);
488 goto retryrw;
489 } /* else >FDC_RW_RETRIES */
490 }/* if output */
491 timeout--;
York Sun472d5462013-04-01 11:29:11 -0700492 } while (true);
wdenk38635852002-08-27 05:55:31 +0000493 } /* for len */
494 /* the last sector of a track or all data has been read,
495 * we need to get the results */
496 fdc_terminate(pCMD);
497 offset+=(sect_size*readblk); /* set up buffer pointer */
Wolfgang Denkd0ff51b2008-07-14 15:19:07 +0200498 bufferw = &buffer[offset];
wdenk38635852002-08-27 05:55:31 +0000499 pCMD->blnr+=readblk; /* update current block nr */
500 blocks-=readblk; /* update blocks */
501 if(blocks==0)
502 break; /* we are finish */
503 /* setup new read blocks */
504 /* readblk=pFG->head*pFG->sect; */
505 readblk=pFG->sect;
506 if(readblk>blocks)
507 readblk=blocks;
508retrycal:
509 /* a seek is necessary */
York Sun472d5462013-04-01 11:29:11 -0700510 if (fdc_seek(pCMD, pFG) == false) {
wdenk38635852002-08-27 05:55:31 +0000511 stop_fdc_drive(pCMD);
Wolfgang Denk4ec6e4a2011-11-09 09:29:02 +0000512 if (flags)
513 enable_interrupts();
York Sun472d5462013-04-01 11:29:11 -0700514 return false;
wdenk38635852002-08-27 05:55:31 +0000515 }
516 if((pCMD->result[STATUS_0]&0x20)!=0x20) {
517 PRINTF("Seek error Status: %02X\n",pCMD->result[STATUS_0]);
518 stop_fdc_drive(pCMD);
York Sun472d5462013-04-01 11:29:11 -0700519 return false;
wdenk38635852002-08-27 05:55:31 +0000520 }
York Sun472d5462013-04-01 11:29:11 -0700521 } while (true); /* start over */
wdenk38635852002-08-27 05:55:31 +0000522 stop_fdc_drive(pCMD); /* switch off drive */
Wolfgang Denk4ec6e4a2011-11-09 09:29:02 +0000523 if (flags)
524 enable_interrupts();
York Sun472d5462013-04-01 11:29:11 -0700525 return true;
wdenk38635852002-08-27 05:55:31 +0000526}
527
528/* Scan all drives and check if drive is present and disk is inserted */
529int fdc_check_drive(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
530{
531 int i,drives,state;
532 /* OK procedure of data book is satisfied.
533 * trying to get some information over the drives */
534 state=0; /* no drives, no disks */
535 for(drives=0;drives<4;drives++) {
536 pCMD->drive=drives;
537 select_fdc_drive(pCMD);
538 pCMD->blnr=0; /* set to the 1st block */
York Sun472d5462013-04-01 11:29:11 -0700539 if (fdc_recalibrate(pCMD, pFG) == false)
wdenk7f6c2cb2002-11-10 22:06:23 +0000540 continue;
wdenk38635852002-08-27 05:55:31 +0000541 if((pCMD->result[STATUS_0]&0x10)==0x10)
wdenk7f6c2cb2002-11-10 22:06:23 +0000542 continue;
wdenk38635852002-08-27 05:55:31 +0000543 /* ok drive connected check for disk */
544 state|=(1<<drives);
545 pCMD->blnr=pFG->size; /* set to the last block */
York Sun472d5462013-04-01 11:29:11 -0700546 if (fdc_seek(pCMD, pFG) == false)
wdenk7f6c2cb2002-11-10 22:06:23 +0000547 continue;
wdenk38635852002-08-27 05:55:31 +0000548 pCMD->blnr=0; /* set to the 1st block */
York Sun472d5462013-04-01 11:29:11 -0700549 if (fdc_recalibrate(pCMD, pFG) == false)
wdenk7f6c2cb2002-11-10 22:06:23 +0000550 continue;
wdenk38635852002-08-27 05:55:31 +0000551 pCMD->cmd[COMMAND]=FDC_CMD_READ_ID;
York Sun472d5462013-04-01 11:29:11 -0700552 if (fdc_issue_cmd(pCMD, pFG) == false)
wdenk7f6c2cb2002-11-10 22:06:23 +0000553 continue;
wdenk38635852002-08-27 05:55:31 +0000554 state|=(0x10<<drives);
555 }
556 stop_fdc_drive(pCMD);
557 for(i=0;i<4;i++) {
558 PRINTF("Floppy Drive %d %sconnected %sDisk inserted %s\n",i,
559 ((state&(1<<i))==(1<<i)) ? "":"not ",
560 ((state&(0x10<<i))==(0x10<<i)) ? "":"no ",
561 ((state&(0x10<<i))==(0x10<<i)) ? pFG->name : "");
562 }
563 pCMD->flags=state;
York Sun472d5462013-04-01 11:29:11 -0700564 return true;
wdenk38635852002-08-27 05:55:31 +0000565}
566
567
568/**************************************************************************
569* int fdc_setup
570* setup the fdc according the datasheet
571* assuming in PS2 Mode
572*/
wdenk2262cfe2002-11-18 00:14:45 +0000573int fdc_setup(int drive, FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG)
wdenk38635852002-08-27 05:55:31 +0000574{
wdenk38635852002-08-27 05:55:31 +0000575 int i;
wdenk7f6c2cb2002-11-10 22:06:23 +0000576
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200577#ifdef CONFIG_SYS_FDC_HW_INIT
wdenk8bde7f72003-06-27 21:31:46 +0000578 fdc_hw_init ();
wdenk7f6c2cb2002-11-10 22:06:23 +0000579#endif
wdenk38635852002-08-27 05:55:31 +0000580 /* first, we reset the FDC via the DOR */
581 write_fdc_reg(FDC_DOR,0x00);
582 for(i=0; i<255; i++) /* then we wait some time */
583 udelay(500);
584 /* then, we clear the reset in the DOR */
wdenk2262cfe2002-11-18 00:14:45 +0000585 pCMD->drive=drive;
wdenk38635852002-08-27 05:55:31 +0000586 select_fdc_drive(pCMD);
587 /* initialize the CCR */
588 write_fdc_reg(FDC_CCR,pFG->rate);
589 /* then initialize the DSR */
590 write_fdc_reg(FDC_DSR,pFG->rate);
York Sun472d5462013-04-01 11:29:11 -0700591 if (wait_for_fdc_int() == false) {
wdenk38635852002-08-27 05:55:31 +0000592 PRINTF("Time Out after writing CCR\n");
York Sun472d5462013-04-01 11:29:11 -0700593 return false;
wdenk38635852002-08-27 05:55:31 +0000594 }
595 /* now issue sense Interrupt and status command
596 * assuming only one drive present (drive 0) */
597 pCMD->dma=0; /* we don't use any dma at all */
598 for(i=0;i<4;i++) {
599 /* issue sense interrupt for all 4 possible drives */
600 pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT;
York Sun472d5462013-04-01 11:29:11 -0700601 if (fdc_issue_cmd(pCMD, pFG) == false) {
wdenk38635852002-08-27 05:55:31 +0000602 PRINTF("Sense Interrupt for drive %d failed\n",i);
603 }
604 }
wdenk2262cfe2002-11-18 00:14:45 +0000605 /* issue the configure command */
606 pCMD->drive=drive;
wdenk38635852002-08-27 05:55:31 +0000607 select_fdc_drive(pCMD);
608 pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE;
York Sun472d5462013-04-01 11:29:11 -0700609 if (fdc_issue_cmd(pCMD, pFG) == false) {
wdenk38635852002-08-27 05:55:31 +0000610 PRINTF(" configure timeout\n");
611 stop_fdc_drive(pCMD);
York Sun472d5462013-04-01 11:29:11 -0700612 return false;
wdenk38635852002-08-27 05:55:31 +0000613 }
614 /* issue specify command */
615 pCMD->cmd[COMMAND]=FDC_CMD_SPECIFY;
York Sun472d5462013-04-01 11:29:11 -0700616 if (fdc_issue_cmd(pCMD, pFG) == false) {
wdenk38635852002-08-27 05:55:31 +0000617 PRINTF(" specify timeout\n");
618 stop_fdc_drive(pCMD);
York Sun472d5462013-04-01 11:29:11 -0700619 return false;
wdenk38635852002-08-27 05:55:31 +0000620
621 }
622 /* then, we clear the reset in the DOR */
623 /* fdc_check_drive(pCMD,pFG); */
624 /* write_fdc_reg(FDC_DOR,0x04); */
wdenkc7de8292002-11-19 11:04:11 +0000625
York Sun472d5462013-04-01 11:29:11 -0700626 return true;
wdenk38635852002-08-27 05:55:31 +0000627}
628
629/****************************************************************************
630 * main routine do_fdcboot
631 */
Wolfgang Denk54841ab2010-06-28 22:00:46 +0200632int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
wdenk38635852002-08-27 05:55:31 +0000633{
634 FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
635 FDC_COMMAND_STRUCT *pCMD = &cmd;
wdenk8bde7f72003-06-27 21:31:46 +0000636 unsigned long addr,imsize;
Tom Rinic76c93a2019-05-23 07:14:07 -0400637#if defined(CONFIG_LEGACY_IMAGE_FORMAT)
wdenk38635852002-08-27 05:55:31 +0000638 image_header_t *hdr; /* used for fdc boot */
Heiko Schocher21d29f72014-05-28 11:33:33 +0200639#endif
wdenk38635852002-08-27 05:55:31 +0000640 unsigned char boot_drive;
641 int i,nrofblk;
Marian Balakowicz09475f72008-03-12 10:33:01 +0100642#if defined(CONFIG_FIT)
Marian Balakowicz3bab76a2008-06-06 23:07:40 +0200643 const void *fit_hdr = NULL;
Marian Balakowicz09475f72008-03-12 10:33:01 +0100644#endif
wdenk38635852002-08-27 05:55:31 +0000645
646 switch (argc) {
647 case 1:
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200648 addr = CONFIG_SYS_LOAD_ADDR;
649 boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
wdenk38635852002-08-27 05:55:31 +0000650 break;
651 case 2:
652 addr = simple_strtoul(argv[1], NULL, 16);
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200653 boot_drive=CONFIG_SYS_FDC_DRIVE_NUMBER;
wdenk38635852002-08-27 05:55:31 +0000654 break;
655 case 3:
656 addr = simple_strtoul(argv[1], NULL, 16);
657 boot_drive=simple_strtoul(argv[2], NULL, 10);
658 break;
659 default:
Simon Glass4c12eeb2011-12-10 08:44:01 +0000660 return CMD_RET_USAGE;
wdenk38635852002-08-27 05:55:31 +0000661 }
662 /* setup FDC and scan for drives */
York Sun472d5462013-04-01 11:29:11 -0700663 if (fdc_setup(boot_drive, pCMD, pFG) == false) {
wdenk38635852002-08-27 05:55:31 +0000664 printf("\n** Error in setup FDC **\n");
665 return 1;
666 }
York Sun472d5462013-04-01 11:29:11 -0700667 if (fdc_check_drive(pCMD, pFG) == false) {
wdenk38635852002-08-27 05:55:31 +0000668 printf("\n** Error in check_drives **\n");
669 return 1;
670 }
671 if((pCMD->flags&(1<<boot_drive))==0) {
672 /* drive not available */
673 printf("\n** Drive %d not availabe **\n",boot_drive);
674 return 1;
675 }
676 if((pCMD->flags&(0x10<<boot_drive))==0) {
677 /* no disk inserted */
678 printf("\n** No disk inserted in drive %d **\n",boot_drive);
679 return 1;
680 }
681 /* ok, we have a valid source */
682 pCMD->drive=boot_drive;
683 /* read first block */
684 pCMD->blnr=0;
York Sun472d5462013-04-01 11:29:11 -0700685 if (fdc_read_data((unsigned char *)addr, 1, pCMD, pFG) == false) {
wdenk38635852002-08-27 05:55:31 +0000686 printf("\nRead error:");
687 for(i=0;i<7;i++)
688 printf("result%d: 0x%02X\n",i,pCMD->result[i]);
689 return 1;
690 }
Marian Balakowiczd5934ad2008-02-04 08:28:09 +0100691
Marian Balakowicz9a4daad2008-02-29 14:58:34 +0100692 switch (genimg_get_format ((void *)addr)) {
Tom Rinic76c93a2019-05-23 07:14:07 -0400693#if defined(CONFIG_LEGACY_IMAGE_FORMAT)
Marian Balakowiczd5934ad2008-02-04 08:28:09 +0100694 case IMAGE_FORMAT_LEGACY:
695 hdr = (image_header_t *)addr;
Marian Balakowiczd5934ad2008-02-04 08:28:09 +0100696 image_print_contents (hdr);
697
698 imsize = image_get_image_size (hdr);
699 break;
Heiko Schocher21d29f72014-05-28 11:33:33 +0200700#endif
Marian Balakowiczd5934ad2008-02-04 08:28:09 +0100701#if defined(CONFIG_FIT)
702 case IMAGE_FORMAT_FIT:
Marian Balakowicz09475f72008-03-12 10:33:01 +0100703 fit_hdr = (const void *)addr;
Marian Balakowicz09475f72008-03-12 10:33:01 +0100704 puts ("Fit image detected...\n");
705
706 imsize = fit_get_size (fit_hdr);
707 break;
Marian Balakowiczd5934ad2008-02-04 08:28:09 +0100708#endif
709 default:
710 puts ("** Unknown image type\n");
wdenk38635852002-08-27 05:55:31 +0000711 return 1;
712 }
wdenk38635852002-08-27 05:55:31 +0000713
wdenk38635852002-08-27 05:55:31 +0000714 nrofblk=imsize/512;
715 if((imsize%512)>0)
716 nrofblk++;
717 printf("Loading %ld Bytes (%d blocks) at 0x%08lx..\n",imsize,nrofblk,addr);
718 pCMD->blnr=0;
York Sun472d5462013-04-01 11:29:11 -0700719 if (fdc_read_data((unsigned char *)addr, nrofblk, pCMD, pFG) == false) {
wdenk38635852002-08-27 05:55:31 +0000720 /* read image block */
721 printf("\nRead error:");
722 for(i=0;i<7;i++)
723 printf("result%d: 0x%02X\n",i,pCMD->result[i]);
724 return 1;
725 }
726 printf("OK %ld Bytes loaded.\n",imsize);
727
728 flush_cache (addr, imsize);
wdenk38635852002-08-27 05:55:31 +0000729
Marian Balakowicz09475f72008-03-12 10:33:01 +0100730#if defined(CONFIG_FIT)
731 /* This cannot be done earlier, we need complete FIT image in RAM first */
Marian Balakowicz3bab76a2008-06-06 23:07:40 +0200732 if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
733 if (!fit_check_format (fit_hdr)) {
734 puts ("** Bad FIT image format\n");
735 return 1;
736 }
737 fit_print_contents (fit_hdr);
738 }
Marian Balakowicz09475f72008-03-12 10:33:01 +0100739#endif
740
741 /* Loading ok, update default load address */
wdenk38635852002-08-27 05:55:31 +0000742 load_addr = addr;
Marian Balakowicz09475f72008-03-12 10:33:01 +0100743
Mike Frysinger67d668b2011-06-05 13:43:02 +0000744 return bootm_maybe_autostart(cmdtp, argv[0]);
wdenk38635852002-08-27 05:55:31 +0000745}
746
wdenk0d498392003-07-01 21:06:45 +0000747U_BOOT_CMD(
748 fdcboot, 3, 1, do_fdcboot,
Peter Tyser2fb26042009-01-27 18:03:12 -0600749 "boot from floppy device",
Wolfgang Denka89c33d2009-05-24 17:06:54 +0200750 "loadAddr drive"
wdenk8bde7f72003-06-27 21:31:46 +0000751);