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/board/flagadm/flash.c

https://gitlab.com/veo-labs/u-boot
C | 687 lines | 482 code | 130 blank | 75 comment | 93 complexity | f0cb87c4c263a6f61779b800f952ee2c MD5 | raw file
  1/*
  2 * (C) Copyright 2001
  3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  4 *
  5 * SPDX-License-Identifier:	GPL-2.0+
  6 */
  7
  8#include <common.h>
  9#include <mpc8xx.h>
 10#include <flash.h>
 11
 12flash_info_t	flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
 13
 14/*-----------------------------------------------------------------------
 15 * Functions
 16 */
 17ulong flash_recognize (vu_long *base);
 18int write_word (flash_info_t *info, ulong dest, ulong data);
 19void flash_get_geometry (vu_long *base, flash_info_t *info);
 20void flash_unprotect(flash_info_t *info);
 21int _flash_real_protect(flash_info_t *info, long idx, int on);
 22
 23
 24unsigned long flash_init (void)
 25{
 26	volatile immap_t	*immap  = (immap_t *)CONFIG_SYS_IMMR;
 27	volatile memctl8xx_t	*memctl = &immap->im_memctl;
 28	int i;
 29	int rec;
 30
 31	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
 32		flash_info[i].flash_id = FLASH_UNKNOWN;
 33	}
 34
 35	*((vu_short*)CONFIG_SYS_FLASH_BASE) = 0xffff;
 36
 37	flash_get_geometry ((vu_long*)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
 38
 39	/* Remap FLASH according to real size */
 40	memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-flash_info[0].size & 0xFFFF8000);
 41	memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) |
 42		(memctl->memc_br0 & ~(BR_BA_MSK));
 43
 44	rec = flash_recognize((vu_long*)CONFIG_SYS_FLASH_BASE);
 45
 46	if (rec == FLASH_UNKNOWN) {
 47		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
 48				flash_info[0].size, flash_info[0].size<<20);
 49	}
 50
 51#if CONFIG_SYS_FLASH_PROTECTION
 52	/*Unprotect all the flash memory*/
 53	flash_unprotect(&flash_info[0]);
 54#endif
 55
 56	*((vu_short*)CONFIG_SYS_FLASH_BASE) = 0xffff;
 57
 58	return (flash_info[0].size);
 59
 60#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
 61	/* monitor protection ON by default */
 62	flash_protect(FLAG_PROTECT_SET,
 63		      CONFIG_SYS_MONITOR_BASE,
 64		      CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
 65		      &flash_info[0]);
 66#endif
 67
 68#ifdef	CONFIG_ENV_IS_IN_FLASH
 69	/* ENV protection ON by default */
 70	flash_protect(FLAG_PROTECT_SET,
 71		      CONFIG_ENV_OFFSET,
 72		      CONFIG_ENV_OFFSET+CONFIG_ENV_SIZE-1,
 73		      &flash_info[0]);
 74#endif
 75	return (flash_info[0].size);
 76}
 77
 78
 79int flash_get_protect_status(flash_info_t * info, long idx)
 80{
 81	vu_short * base;
 82	ushort res;
 83
 84#ifdef DEBUG
 85	printf("\n Attempting to set protection info with %d sectors\n", info->sector_count);
 86#endif
 87
 88
 89	base = (vu_short*)info->start[idx];
 90
 91	*(base) = 0xffff;
 92
 93	*(base + 0x55) = 0x0098;
 94	res = base[0x2];
 95
 96	*(base) = 0xffff;
 97
 98	if(res != 0)
 99		res = 1;
100	else
101		res = 0;
102
103	return res;
104}
105
106void flash_get_geometry (vu_long *base, flash_info_t *info)
107{
108	int i,j;
109	ulong ner = 0;
110	vu_short * sb  = (vu_short*)base;
111	ulong offset = (ulong)base;
112
113	/* Read Device geometry */
114
115	*sb = 0xffff;
116
117	*sb = 0x0090;
118
119	info->flash_id = ((ulong)base[0x0]);
120#ifdef DEBUG
121	printf("Id is %x\n", (uint)(ulong)info->flash_id);
122#endif
123
124	*sb = 0xffff;
125
126	*(sb+0x55) = 0x0098;
127
128	info->size = 1 << (sb[0x27]); /* Read flash size */
129
130#ifdef DEBUG
131	printf("Size is %x\n", (uint)(ulong)info->size);
132#endif
133
134	*sb = 0xffff;
135
136	*(sb + 0x55) = 0x0098;
137	ner = sb[0x2c] ; /*Number of erase regions*/
138
139#ifdef DEBUG
140	printf("Number of erase regions %x\n", (uint)ner);
141#endif
142
143	info->sector_count = 0;
144
145	for(i = 0; i < ner; i++)
146	{
147		uint s;
148		uint count;
149		uint t1,t2,t3,t4;
150
151		*sb = 0xffff;
152
153		*(sb + 0x55) = 0x0098;
154
155		t1 = sb[0x2d + i*4];
156		t2 = sb[0x2e + i*4];
157		t3 = sb[0x2f + i*4];
158		t4 = sb[0x30 + i*4];
159
160		count = ((t1 & 0x00ff) | (((t2 & 0x00ff) << 8) & 0xff00) )+ 1; /*sector count*/
161		s = ((t3 & 0x00ff) | (((t4 & 0x00ff) << 8) & 0xff00)) * 256;; /*Sector size*/
162
163#ifdef DEBUG
164		printf("count and size %x, %x\n", count, s);
165		printf("sector count for erase region %d is %d\n", i, count);
166#endif
167		for(j = 0; j < count; j++)
168		{
169#ifdef DEBUG
170			printf("%x, ", (uint)offset);
171#endif
172			info->start[ info->sector_count + j] = offset;
173			offset += s;
174		}
175		info->sector_count += count;
176	}
177
178	if ((offset - (ulong)base) != info->size)
179		printf("WARNING reported size %x does not match to calculted size %x.\n"
180				, (uint)info->size, (uint)(offset - (ulong)base) );
181
182	/* Next check if there are any sectors protected.*/
183
184	for(i = 0; i < info->sector_count; i++)
185		info->protect[i] = flash_get_protect_status(info, i);
186
187	*sb = 0xffff;
188}
189
190/*-----------------------------------------------------------------------
191 */
192void flash_print_info  (flash_info_t *info)
193{
194	int i;
195
196	if (info->flash_id == FLASH_UNKNOWN) {
197		printf ("missing or unknown FLASH type\n");
198		return ;
199	}
200
201	switch (info->flash_id & FLASH_VENDMASK) {
202	case INTEL_MANUFACT & FLASH_VENDMASK:
203		printf ("Intel ");
204		break;
205	default:
206		printf ("Unknown Vendor ");
207		break;
208	}
209
210	switch (info->flash_id & FLASH_TYPEMASK) {
211	case INTEL_ID_28F320C3B & FLASH_TYPEMASK:
212		printf ("28F320RC3(4 MB)\n");
213		break;
214	case INTEL_ID_28F320J3A:
215		printf("28F320J3A (4 MB)\n");
216		break;
217	default:
218		printf ("Unknown Chip Type\n");
219			break;
220	}
221
222	printf ("  Size: %ld MB in %d Sectors\n",
223		info->size >> 20, info->sector_count);
224
225	printf ("  Sector Start Addresses:");
226	for (i=0; i<info->sector_count; ++i) {
227		if ((i % 4) == 0)
228			printf ("\n   ");
229		printf ("  %02d %08lX%s",
230			i, info->start[i],
231			info->protect[i]!=0 ? " (RO)" : "     "
232		);
233	}
234	printf ("\n");
235	return ;
236}
237
238ulong flash_recognize (vu_long *base)
239{
240	ulong id;
241	ulong res = FLASH_UNKNOWN;
242	vu_short * sb = (vu_short*)base;
243
244	*sb = 0xffff;
245
246	*sb = 0x0090;
247	id = base[0];
248
249	switch (id & 0x00FF0000)
250	{
251		case (MT_MANUFACT & 0x00FF0000):	/* MT or => Intel */
252		case (INTEL_ALT_MANU & 0x00FF0000):
253		res = FLASH_MAN_INTEL;
254		break;
255	default:
256		res = FLASH_UNKNOWN;
257	}
258
259	*sb = 0xffff;
260
261	return res;
262}
263
264/*-----------------------------------------------------------------------*/
265#define INTEL_FLASH_STATUS_BLS	0x02
266#define INTEL_FLASH_STATUS_PSS	0x04
267#define INTEL_FLASH_STATUS_VPPS	0x08
268#define INTEL_FLASH_STATUS_PS	0x10
269#define INTEL_FLASH_STATUS_ES	0x20
270#define INTEL_FLASH_STATUS_ESS	0x40
271#define INTEL_FLASH_STATUS_WSMS	0x80
272
273int	flash_decode_status_bits(char status)
274{
275	int err = 0;
276
277	if(!(status & INTEL_FLASH_STATUS_WSMS)) {
278		printf("Busy\n");
279		err = -1;
280	}
281
282	if(status & INTEL_FLASH_STATUS_ESS) {
283		printf("Erase suspended\n");
284		err = -1;
285	}
286
287	if(status & INTEL_FLASH_STATUS_ES) {
288		printf("Error in block erase\n");
289		err = -1;
290	}
291
292	if(status & INTEL_FLASH_STATUS_PS) {
293		printf("Error in programming\n");
294		err = -1;
295	}
296
297	if(status & INTEL_FLASH_STATUS_VPPS) {
298		printf("Vpp low, operation aborted\n");
299		err = -1;
300	}
301
302	if(status & INTEL_FLASH_STATUS_PSS) {
303		printf("Program is suspended\n");
304		err = -1;
305	}
306
307	if(status & INTEL_FLASH_STATUS_BLS) {
308		printf("Attempting to program/erase a locked sector\n");
309		err = -1;
310	}
311
312	if((status & INTEL_FLASH_STATUS_PS) &&
313	   (status & INTEL_FLASH_STATUS_ES) &&
314	   (status & INTEL_FLASH_STATUS_ESS)) {
315		printf("A command sequence error\n");
316		return -1;
317	}
318
319	return err;
320}
321
322/*-----------------------------------------------------------------------
323 */
324
325int	flash_erase (flash_info_t *info, int s_first, int s_last)
326{
327	vu_short *addr;
328	int flag, prot, sect;
329	ulong start, now;
330	int rcode = 0;
331
332	if ((s_first < 0) || (s_first > s_last)) {
333		if (info->flash_id == FLASH_UNKNOWN) {
334			printf ("- missing\n");
335		} else {
336			printf ("- no sectors to erase\n");
337		}
338		return 1;
339	}
340
341	if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK)) {
342		printf ("Can't erase unknown flash type %08lx - aborted\n",
343			info->flash_id);
344		return 1;
345	}
346
347	prot = 0;
348	for (sect=s_first; sect<=s_last; ++sect) {
349		if (info->protect[sect]) {
350			prot++;
351		}
352	}
353
354	if (prot) {
355		printf ("- Warning: %d protected sectors will not be erased!\n",
356			prot);
357	} else {
358		printf ("\n");
359	}
360
361	start = get_timer (0);
362
363	/* Start erase on unprotected sectors */
364	for (sect = s_first; sect<=s_last; sect++) {
365		char tmp;
366
367		if (info->protect[sect] == 0) {	/* not protected */
368			addr = (vu_short *)(info->start[sect]);
369
370			/* Disable interrupts which might cause a timeout here */
371			flag = disable_interrupts();
372
373			/* Single Block Erase Command */
374			*addr = 0x0020;
375			/* Confirm */
376			*addr = 0x00D0;
377			/* Resume Command, as per errata update */
378			*addr = 0x00D0;
379
380			/* re-enable interrupts if necessary */
381			if (flag)
382				enable_interrupts();
383
384			*addr = 0x70; /*Read status register command*/
385			tmp = (short)*addr & 0x00FF; /* Read the status */
386			while (!(tmp & INTEL_FLASH_STATUS_WSMS)) {
387				if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
388					*addr = 0x0050; /* Reset the status register */
389					*addr = 0xffff;
390					printf ("Timeout\n");
391					return 1;
392				}
393				/* show that we're waiting */
394				if ((now - start) > 1000) {	/* every second */
395					putc ('.');
396				}
397				udelay(100000); /* 100 ms */
398				*addr = 0x0070; /*Read status register command*/
399				tmp = (short)*addr & 0x00FF; /* Read status */
400				start = get_timer(0);
401			}
402			if( tmp & INTEL_FLASH_STATUS_ES )
403				flash_decode_status_bits(tmp);
404
405			*addr = 0x0050; /* Reset the status register */
406			*addr = 0xffff; /* Reset to read mode */
407		}
408	}
409
410
411	printf (" done\n");
412	return rcode;
413}
414
415void flash_unprotect (flash_info_t *info)
416{
417	/*We can only unprotect the whole flash at once*/
418	/*Therefore we must prevent the _flash_real_protect()*/
419	/*from re-protecting sectors, that ware protected before */
420	/*we called flash_real_protect();*/
421
422	int i;
423
424	for(i = 0; i < info->sector_count; i++)
425		info->protect[i] = 0;
426
427#ifdef CONFIG_SYS_FLASH_PROTECTION
428		_flash_real_protect(info, 0, 0);
429#endif
430}
431
432/*-----------------------------------------------------------------------
433 * Copy memory to flash, returns:
434 * 0 - OK
435 * 1 - write timeout
436 * 2 - Flash not erased
437 */
438
439int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
440{
441	ulong cp, wp, data;
442	int i, l, rc;
443
444	wp = (addr & ~3);	/* get lower word aligned address */
445
446	/*
447	 * handle unaligned start bytes
448	 */
449	if ((l = addr - wp) != 0) {
450		data = 0;
451		for (i=0, cp=wp; i<l; ++i, ++cp) {
452			data = (data << 8) | (*(uchar *)cp);
453		}
454		for (; i<4 && cnt>0; ++i) {
455			data = (data << 8) | *src++;
456			--cnt;
457			++cp;
458		}
459		for (; cnt==0 && i<4; ++i, ++cp) {
460			data = (data << 8) | (*(uchar *)cp);
461		}
462
463		if ((rc = write_word(info, wp, data)) != 0) {
464			return (rc);
465		}
466		wp += 4;
467	}
468
469	/*
470	 * handle word aligned part
471	 */
472	while (cnt >= 4) {
473		data = 0;
474		for (i=0; i<4; ++i) {
475			data = (data << 8) | *src++;
476		}
477		if ((rc = write_word(info, wp, data)) != 0) {
478			return (rc);
479		}
480		wp  += 4;
481		cnt -= 4;
482	}
483
484	if (cnt == 0) {
485		return (0);
486	}
487
488	/*
489	 * handle unaligned tail bytes
490	 */
491	data = 0;
492	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
493		data = (data << 8) | *src++;
494		--cnt;
495	}
496	for (; i<4; ++i, ++cp) {
497		data = (data << 8) | (*(uchar *)cp);
498	}
499
500	return (write_word(info, wp, data));
501}
502
503/*-----------------------------------------------------------------------
504 * Write a word to Flash, returns:
505 * 0 - OK
506 * 1 - write timeout
507 * 2 - Flash not erased
508 */
509int write_word (flash_info_t *info, ulong dest, ulong da)
510{
511	vu_short *addr = (vu_short *)dest;
512	ulong start;
513	char csr;
514	int flag;
515	int i;
516	union {
517		u32 data32;
518		u16 data16[2];
519	} data;
520
521	data.data32 = da;
522
523	/* Check if Flash is (sufficiently) erased */
524	if (((*addr & data.data16[0]) != data.data16[0]) ||
525	    ((*(addr+1) & data.data16[1]) != data.data16[1])) {
526		return (2);
527	}
528	/* Disable interrupts which might cause a timeout here */
529	flag = disable_interrupts();
530
531	for(i = 0; i < 2; i++)
532	{
533		/* Write Command */
534		*addr = 0x0010;
535
536		/* Write Data */
537		*addr = data.data16[i];
538
539		/* re-enable interrupts if necessary */
540		if (flag)
541			enable_interrupts();
542
543		/* data polling for D7 */
544		start = get_timer (0);
545		flag  = 0;
546		*addr = 0x0070; /*Read statusregister command */
547		while (((csr = *addr) & INTEL_FLASH_STATUS_WSMS)!=INTEL_FLASH_STATUS_WSMS) {
548			if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
549				flag = 1;
550				break;
551			}
552			*addr = 0x0070; /*Read statusregister command */
553		}
554		if (csr & INTEL_FLASH_STATUS_PSS) {
555			printf ("CSR indicates write error (%0x) at %08lx\n",
556					csr, (ulong)addr);
557			flag = 1;
558		}
559
560		/* Clear Status Registers Command */
561		*addr = 0x0050;
562		/* Reset to read array mode */
563		*addr = 0xffff;
564		addr++;
565	}
566
567	return (flag);
568}
569
570int flash_real_protect(flash_info_t *info, long offset, int prot)
571{
572	int i, idx;
573
574	for(idx = 0; idx < info->sector_count; idx++)
575		if(info->start[idx] == offset)
576			break;
577
578	if(idx==info->sector_count)
579		return -1;
580
581	if(prot == 0) {
582		/* Unprotect one sector, which means unprotect all flash
583		 * and reprotect the other protected sectors.
584		 */
585		_flash_real_protect(info, 0, 0); /* Unprotects the whole flash*/
586		info->protect[idx] = 0;
587
588		for(i = 0; i < info->sector_count; i++)
589			if(info->protect[i])
590				_flash_real_protect(info, i, 1);
591		}
592	else {
593		/* We can protect individual sectors */
594		_flash_real_protect(info, idx, 1);
595	}
596
597	for( i = 0; i < info->sector_count; i++)
598		info->protect[i] = flash_get_protect_status(info, i);
599
600	return 0;
601}
602
603int _flash_real_protect(flash_info_t *info, long idx, int prot)
604{
605	vu_short *addr;
606	int flag;
607	ushort cmd;
608	ushort tmp;
609	ulong now, start;
610
611	if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK)) {
612		printf ("Can't change protection for unknown flash type %08lx - aborted\n",
613			info->flash_id);
614		return -1;
615	}
616
617	if(prot == 0) {
618		/*Unlock the sector*/
619		cmd = 0x00D0;
620	}
621	else {
622		/*Lock the sector*/
623		cmd = 0x0001;
624	}
625
626	addr = (vu_short *)(info->start[idx]);
627
628	/* If chip is busy, wait for it */
629	start = get_timer(0);
630	*addr = 0x0070; /*Read status register command*/
631	tmp = ((ushort)(*addr))&0x00ff; /*Read the status*/
632	while(!(tmp & INTEL_FLASH_STATUS_WSMS)) {
633		/*Write State Machine Busy*/
634		/*Wait untill done or timeout.*/
635		if ((now=get_timer(start)) > CONFIG_SYS_FLASH_WRITE_TOUT) {
636			*addr = 0x0050; /* Reset the status register */
637			*addr = 0xffff; /* Reset the chip */
638			printf ("TTimeout\n");
639			return 1;
640		}
641		*addr = 0x0070;
642		tmp = ((ushort)(*addr))&0x00ff; /*Read the status*/
643		start = get_timer(0);
644	}
645
646	/* Disable interrupts which might cause a timeout here */
647	flag = disable_interrupts();
648
649	/* Unlock block*/
650	*addr = 0x0060;
651
652	*addr = cmd;
653
654	/* re-enable interrupts if necessary */
655	if (flag)
656		enable_interrupts();
657
658	start = get_timer(0);
659	*addr = 0x0070; /*Read status register command*/
660	tmp = ((ushort)(*addr)) & 0x00FF; /* Read the status */
661	while (!(tmp & INTEL_FLASH_STATUS_WSMS)) {
662		/* Write State Machine Busy */
663		if ((now=get_timer(start)) > CONFIG_SYS_FLASH_WRITE_TOUT) {
664			*addr = 0x0050; /* Reset the status register */
665			*addr = 0xffff;
666			printf ("Timeout\n");
667			return 1;
668		}
669		/* show that we're waiting */
670		if ((now - start) > 1000) {	/* every second */
671			putc ('.');
672		}
673		udelay(100000); /* 100 ms */
674		*addr = 0x70; /*Read status register command*/
675		tmp = (short)*addr & 0x00FF; /* Read status */
676		start = get_timer(0);
677	}
678	if( tmp & INTEL_FLASH_STATUS_PS )
679		flash_decode_status_bits(tmp);
680
681	*addr =0x0050; /*Clear status register*/
682
683	/* reset to read mode */
684	*addr = 0xffff;
685
686	return 0;
687}