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uboot/u-boot-stm32mp-2020.01/board/freescale/m5253demo/flash.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000-2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
*/
#include <common.h>
#include <irq_func.h>
#include <asm/immap.h>
#ifndef CONFIG_SYS_FLASH_CFI
typedef unsigned short FLASH_PORT_WIDTH;
typedef volatile unsigned short FLASH_PORT_WIDTHV;
#define FPW FLASH_PORT_WIDTH
#define FPWV FLASH_PORT_WIDTHV
#define FLASH_CYCLE1 0x5555
#define FLASH_CYCLE2 0x2aaa
#define SYNC __asm__("nop")
/*-----------------------------------------------------------------------
* Functions
*/
ulong flash_get_size(FPWV * addr, flash_info_t * info);
int flash_get_offsets(ulong base, flash_info_t * info);
int write_word(flash_info_t * info, FPWV * dest, u16 data);
static inline void spin_wheel(void);
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
ulong flash_init(void)
{
ulong size = 0;
ulong fbase = 0;
fbase = (ulong) CONFIG_SYS_FLASH_BASE;
flash_get_size((FPWV *) fbase, &flash_info[0]);
flash_get_offsets((ulong) fbase, &flash_info[0]);
fbase += flash_info[0].size;
size += flash_info[0].size;
/* Protect monitor and environment sectors */
flash_protect(FLAG_PROTECT_SET,
CONFIG_SYS_MONITOR_BASE,
CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1, &flash_info[0]);
return size;
}
int flash_get_offsets(ulong base, flash_info_t * info)
{
int i;
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
info->start[0] = base;
info->protect[0] = 0;
for (i = 1; i < CONFIG_SYS_SST_SECT; i++) {
info->start[i] = info->start[i - 1]
+ CONFIG_SYS_SST_SECTSZ;
info->protect[i] = 0;
}
}
return ERR_OK;
}
void flash_print_info(flash_info_t * info)
{
int i;
switch (info->flash_id & FLASH_VENDMASK) {
case FLASH_MAN_SST:
printf("SST ");
break;
default:
printf("Unknown Vendor ");
break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_SST6401B:
printf("SST39VF6401B\n");
break;
default:
printf("Unknown Chip Type\n");
return;
}
if (info->size > 0x100000) {
int remainder;
printf(" Size: %ld", info->size >> 20);
remainder = (info->size % 0x100000);
if (remainder) {
remainder >>= 10;
remainder = (int)((float)
(((float)remainder / (float)1024) *
10000));
printf(".%d ", remainder);
}
printf("MB in %d Sectors\n", info->sector_count);
} else
printf(" Size: %ld KB in %d Sectors\n",
info->size >> 10, 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");
}
/*
* The following code cannot be run from FLASH!
*/
ulong flash_get_size(FPWV * addr, flash_info_t * info)
{
u16 value;
addr[FLASH_CYCLE1] = (FPWV) 0x00AA00AA; /* for Atmel, Intel ignores this */
addr[FLASH_CYCLE2] = (FPWV) 0x00550055; /* for Atmel, Intel ignores this */
addr[FLASH_CYCLE1] = (FPWV) 0x00900090; /* selects Intel or Atmel */
switch (addr[0] & 0xffff) {
case (u8) SST_MANUFACT:
info->flash_id = FLASH_MAN_SST;
value = addr[1];
break;
default:
printf("Unknown Flash\n");
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
*addr = (FPW) 0x00F000F0;
return (0); /* no or unknown flash */
}
switch (value) {
case (u16) SST_ID_xF6401B:
info->flash_id += FLASH_SST6401B;
break;
default:
info->flash_id = FLASH_UNKNOWN;
break;
}
info->sector_count = 0;
info->size = 0;
info->sector_count = CONFIG_SYS_SST_SECT;
info->size = CONFIG_SYS_SST_SECT * CONFIG_SYS_SST_SECTSZ;
/* reset ID mode */
*addr = (FPWV) 0x00F000F0;
if (info->sector_count > CONFIG_SYS_MAX_FLASH_SECT) {
printf("** ERROR: sector count %d > max (%d) **\n",
info->sector_count, CONFIG_SYS_MAX_FLASH_SECT);
info->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
}
return (info->size);
}
int flash_erase(flash_info_t * info, int s_first, int s_last)
{
FPWV *addr;
int flag, prot, sect, count;
ulong type, start;
int rcode = 0, flashtype = 0;
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;
}
type = (info->flash_id & FLASH_VENDMASK);
switch (type) {
case FLASH_MAN_SST:
flashtype = 1;
break;
default:
type = (info->flash_id & FLASH_VENDMASK);
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");
flag = disable_interrupts();
start = get_timer(0);
if ((s_last - s_first) == (CONFIG_SYS_SST_SECT - 1)) {
if (prot == 0) {
addr = (FPWV *) info->start[0];
addr[FLASH_CYCLE1] = 0x00AA; /* unlock */
addr[FLASH_CYCLE2] = 0x0055; /* unlock */
addr[FLASH_CYCLE1] = 0x0080; /* erase mode */
addr[FLASH_CYCLE1] = 0x00AA; /* unlock */
addr[FLASH_CYCLE2] = 0x0055; /* unlock */
*addr = 0x0030; /* erase chip */
count = 0;
start = get_timer(0);
while ((*addr & 0x0080) != 0x0080) {
if (count++ > 0x10000) {
spin_wheel();
count = 0;
}
if (get_timer(start) > CONFIG_SYS_FLASH_ERASE_TOUT) {
printf("Timeout\n");
*addr = 0x00F0; /* reset to read mode */
return 1;
}
}
*addr = 0x00F0; /* reset to read mode */
printf("\b. done\n");
if (flag)
enable_interrupts();
return 0;
} else if (prot == CONFIG_SYS_SST_SECT) {
return 1;
}
}
/* Start erase on unprotected sectors */
for (sect = s_first; sect <= s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr = (FPWV *) (info->start[sect]);
printf(".");
/* arm simple, non interrupt dependent timer */
start = get_timer(0);
switch (flashtype) {
case 1:
{
FPWV *base; /* first address in bank */
flag = disable_interrupts();
base = (FPWV *) (CONFIG_SYS_FLASH_BASE); /* First sector */
base[FLASH_CYCLE1] = 0x00AA; /* unlock */
base[FLASH_CYCLE2] = 0x0055; /* unlock */
base[FLASH_CYCLE1] = 0x0080; /* erase mode */
base[FLASH_CYCLE1] = 0x00AA; /* unlock */
base[FLASH_CYCLE2] = 0x0055; /* unlock */
*addr = 0x0050; /* erase sector */
if (flag)
enable_interrupts();
while ((*addr & 0x0080) != 0x0080) {
if (get_timer(start) >
CONFIG_SYS_FLASH_ERASE_TOUT) {
printf("Timeout\n");
*addr = 0x00F0; /* reset to read mode */
rcode = 1;
break;
}
}
*addr = 0x00F0; /* reset to read mode */
break;
}
} /* switch (flashtype) */
}
}
printf(" done\n");
if (flag)
enable_interrupts();
return rcode;
}
int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
ulong wp, count;
u16 data;
int rc;
if (info->flash_id == FLASH_UNKNOWN)
return 4;
/* get lower word aligned address */
wp = addr;
/* handle unaligned start bytes */
if (wp & 1) {
data = *((FPWV *) wp);
data = (data << 8) | *src;
if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
return (rc);
wp++;
cnt -= 1;
src++;
}
while (cnt >= 2) {
/*
* handle word aligned part
*/
count = 0;
data = *((FPWV *) src);
if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
return (rc);
wp += 2;
src += 2;
cnt -= 2;
if (count++ > 0x800) {
spin_wheel();
count = 0;
}
}
/* handle word aligned part */
if (cnt) {
/* handle word aligned part */
count = 0;
data = *((FPWV *) wp);
data = (data & 0x00FF) | (*src << 8);
if ((rc = write_word(info, (FPWV *) wp, data)) != 0)
return (rc);
wp++;
src++;
cnt -= 1;
if (count++ > 0x800) {
spin_wheel();
count = 0;
}
}
if (cnt == 0)
return ERR_OK;
return ERR_OK;
}
/*-----------------------------------------------------------------------
* Write a word to Flash
* A word is 16 bits, whichever the bus width of the flash bank
* (not an individual chip) is.
*
* returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
int write_word(flash_info_t * info, FPWV * dest, u16 data)
{
ulong start;
int flag;
int res = 0; /* result, assume success */
FPWV *base; /* first address in flash bank */
/* Check if Flash is (sufficiently) erased */
if ((*dest & (u8) data) != (u8) data) {
return (2);
}
base = (FPWV *) (CONFIG_SYS_FLASH_BASE);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
base[FLASH_CYCLE1] = (u8) 0x00AA00AA; /* unlock */
base[FLASH_CYCLE2] = (u8) 0x00550055; /* unlock */
base[FLASH_CYCLE1] = (u8) 0x00A000A0; /* selects program mode */
*dest = data; /* start programming the data */
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
start = get_timer(0);
/* data polling for D7 */
while (res == 0
&& (*dest & (u8) 0x00800080) != (data & (u8) 0x00800080)) {
if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
*dest = (u8) 0x00F000F0; /* reset bank */
res = 1;
}
}
*dest++ = (u8) 0x00F000F0; /* reset bank */
return (res);
}
static inline void spin_wheel(void)
{
static int p = 0;
static char w[] = "\\/-";
printf("\010%c", w[p]);
(++p == 3) ? (p = 0) : 0;
}
#endif
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