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u-boot/board/RPXlite/flash.c

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/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* Yoo. Jonghoon, IPone, yooth@ipone.co.kr
* U-Boot port on RPXlite board
*
* Some of flash control words are modified. (from 2x16bit device
* to 4x8bit device)
* RPXLite board I tested has only 4 AM29LV800BB devices. Other devices
* are not tested.
*
* (?) Does an RPXLite board which
* does not use AM29LV800 flash memory exist ?
* I don't know...
*/
#include <common.h>
#include <mpc8xx.h>
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
/*-----------------------------------------------------------------------
* Functions
*/
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static int write_word (flash_info_t *info, ulong dest, ulong data);
static void flash_get_offsets (ulong base, flash_info_t *info);
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
/* volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; */
/* volatile memctl8xx_t *memctl = &immap->im_memctl; */
unsigned long size_b0 ;
int i;
/* Init: no FLASHes known */
for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
/* Static FLASH Bank configuration here - FIXME XXX */
/*
size_b0 = flash_get_size((vu_long *)FLASH_BASE_DEBUG, &flash_info[0]);
if (flash_info[0].flash_id == FLASH_UNKNOWN) {
printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
size_b0, size_b0<<20);
}
*/
/* Remap FLASH according to real size */
/*%%%
memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) | BR_MS_GPCM | BR_V;
%%%*/
/* Re-do sizing to get full correct info */
size_b0 = flash_get_size((vu_long *)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
flash_get_offsets (CONFIG_SYS_FLASH_BASE, &flash_info[0]);
#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
/* monitor protection ON by default */
flash_protect(FLAG_PROTECT_SET,
CONFIG_SYS_MONITOR_BASE,
CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
&flash_info[0]);
#endif
flash_info[0].size = size_b0;
return (size_b0);
}
/*-----------------------------------------------------------------------
*/
static void flash_get_offsets (ulong base, flash_info_t *info)
{
int i;
/* set up sector start address table */
if (info->flash_id & FLASH_BTYPE) {
/* set sector offsets for bottom boot block type */
info->start[0] = base + 0x00000000;
info->start[1] = base + 0x00010000;
info->start[2] = base + 0x00018000;
info->start[3] = base + 0x00020000;
for (i = 4; i < info->sector_count; i++) {
info->start[i] = base + ((i-3) * 0x00040000) ;
}
} else {
/* set sector offsets for top boot block type */
i = info->sector_count - 1;
info->start[i--] = base + info->size - 0x00010000;
info->start[i--] = base + info->size - 0x00018000;
info->start[i--] = base + info->size - 0x00020000;
for (; i >= 0; i--) {
info->start[i] = base + i * 0x00040000;
}
}
}
/*-----------------------------------------------------------------------
*/
void flash_print_info (flash_info_t *info)
{
int i;
if (info->flash_id == FLASH_UNKNOWN) {
printf ("missing or unknown FLASH type\n");
return;
}
switch (info->flash_id & FLASH_VENDMASK) {
case FLASH_MAN_AMD: printf ("AMD "); break;
case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n");
break;
case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n");
break;
case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n");
break;
case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n");
break;
case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n");
break;
case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n");
break;
case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n");
break;
case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n");
break;
default: printf ("Unknown Chip Type\n");
break;
}
printf (" Size: %ld MB in %d Sectors\n",
info->size >> 20, info->sector_count);
printf (" Sector Start Addresses:");
for (i=0; i<info->sector_count; ++i) {
if ((i % 5) == 0)
printf ("\n ");
printf (" %08lX%s",
info->start[i],
info->protect[i] ? " (RO)" : " "
);
}
printf ("\n");
return;
}
/*-----------------------------------------------------------------------
*/
/*-----------------------------------------------------------------------
*/
/*
* The following code cannot be run from FLASH!
*/
static ulong flash_get_size (vu_long *addr, flash_info_t *info)
{
short i;
ulong value;
ulong base = (ulong)addr;
/* Write auto select command: read Manufacturer ID */
addr[0xAAA] = 0x00AA00AA ;
addr[0x555] = 0x00550055 ;
addr[0xAAA] = 0x00900090 ;
value = addr[0] ;
switch (value & 0x00FF00FF) {
case AMD_MANUFACT:
info->flash_id = FLASH_MAN_AMD;
break;
case FUJ_MANUFACT:
info->flash_id = FLASH_MAN_FUJ;
break;
default:
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (0); /* no or unknown flash */
}
value = addr[2] ; /* device ID */
switch (value & 0x00FF00FF) {
case (AMD_ID_LV400T & 0x00FF00FF):
info->flash_id += FLASH_AM400T;
info->sector_count = 11;
info->size = 0x00100000;
break; /* => 1 MB */
case (AMD_ID_LV400B & 0x00FF00FF):
info->flash_id += FLASH_AM400B;
info->sector_count = 11;
info->size = 0x00100000;
break; /* => 1 MB */
case (AMD_ID_LV800T & 0x00FF00FF):
info->flash_id += FLASH_AM800T;
info->sector_count = 19;
info->size = 0x00200000;
break; /* => 2 MB */
case (AMD_ID_LV800B & 0x00FF00FF):
info->flash_id += FLASH_AM800B;
info->sector_count = 19;
info->size = 0x00400000; /*%%% Size doubled by yooth */
break; /* => 4 MB */
case (AMD_ID_LV160T & 0x00FF00FF):
info->flash_id += FLASH_AM160T;
info->sector_count = 35;
info->size = 0x00400000;
break; /* => 4 MB */
case (AMD_ID_LV160B & 0x00FF00FF):
info->flash_id += FLASH_AM160B;
info->sector_count = 35;
info->size = 0x00400000;
break; /* => 4 MB */
#if 0 /* enable when device IDs are available */
case AMD_ID_LV320T:
info->flash_id += FLASH_AM320T;
info->sector_count = 67;
info->size = 0x00800000;
break; /* => 8 MB */
case AMD_ID_LV320B:
info->flash_id += FLASH_AM320B;
info->sector_count = 67;
info->size = 0x00800000;
break; /* => 8 MB */
#endif
default:
info->flash_id = FLASH_UNKNOWN;
return (0); /* => no or unknown flash */
}
/*%%% sector start address modified */
/* set up sector start address table */
if (info->flash_id & FLASH_BTYPE) {
/* set sector offsets for bottom boot block type */
info->start[0] = base + 0x00000000;
info->start[1] = base + 0x00010000;
info->start[2] = base + 0x00018000;
info->start[3] = base + 0x00020000;
for (i = 4; i < info->sector_count; i++) {
info->start[i] = base + ((i-3) * 0x00040000) ;
}
} else {
/* set sector offsets for top boot block type */
i = info->sector_count - 1;
info->start[i--] = base + info->size - 0x00010000;
info->start[i--] = base + info->size - 0x00018000;
info->start[i--] = base + info->size - 0x00020000;
for (; i >= 0; i--) {
info->start[i] = base + i * 0x00040000;
}
}
/* check for protected sectors */
for (i = 0; i < info->sector_count; i++) {
/* read sector protection at sector address, (A7 .. A0) = 0x02 */
/* D0 = 1 if protected */
addr = (volatile unsigned long *)(info->start[i]);
info->protect[i] = addr[4] & 1 ;
}
/*
* Prevent writes to uninitialized FLASH.
*/
if (info->flash_id != FLASH_UNKNOWN) {
addr = (volatile unsigned long *)info->start[0];
*addr = 0xF0F0F0F0; /* reset bank */
}
return (info->size);
}
/*-----------------------------------------------------------------------
*/
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
vu_long *addr = (vu_long*)(info->start[0]);
int flag, prot, sect, l_sect;
ulong start, now, last;
if ((s_first < 0) || (s_first > s_last)) {
if (info->flash_id == FLASH_UNKNOWN) {
printf ("- missing\n");
} else {
printf ("- no sectors to erase\n");
}
return 1;
}
if ((info->flash_id == FLASH_UNKNOWN) ||
(info->flash_id > FLASH_AMD_COMP)) {
printf ("Can't erase unknown flash type %08lx - aborted\n",
info->flash_id);
return 1;
}
prot = 0;
for (sect=s_first; sect<=s_last; ++sect) {
if (info->protect[sect]) {
prot++;
}
}
if (prot) {
printf ("- Warning: %d protected sectors will not be erased!\n",
prot);
} else {
printf ("\n");
}
l_sect = -1;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
addr[0xAAA] = 0xAAAAAAAA;
addr[0x555] = 0x55555555;
addr[0xAAA] = 0x80808080;
addr[0xAAA] = 0xAAAAAAAA;
addr[0x555] = 0x55555555;
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr = (vu_long *)(info->start[sect]) ;
addr[0] = 0x30303030 ;
l_sect = sect;
}
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* wait at least 80us - let's wait 1 ms */
udelay (1000);
/*
* We wait for the last triggered sector
*/
if (l_sect < 0)
goto DONE;
start = get_timer (0);
last = start;
addr = (vu_long *)(info->start[l_sect]);
while ((addr[0] & 0x80808080) != 0x80808080) {
if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
printf ("Timeout\n");
return 1;
}
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
}
DONE:
/* reset to read mode */
addr = (vu_long *)info->start[0];
addr[0] = 0xF0F0F0F0; /* reset bank */
printf (" done\n");
return 0;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong cp, wp, data;
int i, l, rc;
wp = (addr & ~3); /* get lower word aligned address */
/*
* handle unaligned start bytes
*/
if ((l = addr - wp) != 0) {
data = 0;
for (i=0, cp=wp; i<l; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
for (; i<4 && cnt>0; ++i) {
data = (data << 8) | *src++;
--cnt;
++cp;
}
for (; cnt==0 && i<4; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
if ((rc = write_word(info, wp, data)) != 0) {
return (rc);
}
wp += 4;
}
/*
* handle word aligned part
*/
while (cnt >= 4) {
data = 0;
for (i=0; i<4; ++i) {
data = (data << 8) | *src++;
}
if ((rc = write_word(info, wp, data)) != 0) {
return (rc);
}
wp += 4;
cnt -= 4;
}
if (cnt == 0) {
return (0);
}
/*
* handle unaligned tail bytes
*/
data = 0;
for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
data = (data << 8) | *src++;
--cnt;
}
for (; i<4; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
return (write_word(info, wp, data));
}
/*-----------------------------------------------------------------------
* Write a word to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_word (flash_info_t *info, ulong dest, ulong data)
{
vu_long *addr = (vu_long *)(info->start[0]);
ulong start;
int flag;
/* Check if Flash is (sufficiently) erased */
if ((*((vu_long *)dest) & data) != data) {
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
addr[0xAAA] = 0xAAAAAAAA;
addr[0x555] = 0x55555555;
addr[0xAAA] = 0xA0A0A0A0;
*((vu_long *)dest) = data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
/* data polling for D7 */
start = get_timer (0);
while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
return (1);
}
}
return (0);
}
/*-----------------------------------------------------------------------
*/
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