u-boot/common/flash.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

218 lines
5.4 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
/* #define DEBUG */
#include <common.h>
#include <flash.h>
#include <mtd/cfi_flash.h>
extern flash_info_t flash_info[]; /* info for FLASH chips */
/*-----------------------------------------------------------------------
* Functions
*/
/*-----------------------------------------------------------------------
* Set protection status for monitor sectors
*
* The monitor is always located in the _first_ Flash bank.
* If necessary you have to map the second bank at lower addresses.
*/
void
flash_protect (int flag, ulong from, ulong to, flash_info_t *info)
{
ulong b_end;
short s_end;
int i;
/* Do nothing if input data is bad. */
if (!info || info->sector_count == 0 || info->size == 0 || to < from) {
return;
}
s_end = info->sector_count - 1; /* index of last sector */
b_end = info->start[0] + info->size - 1; /* bank end address */
debug ("flash_protect %s: from 0x%08lX to 0x%08lX\n",
(flag & FLAG_PROTECT_SET) ? "ON" :
(flag & FLAG_PROTECT_CLEAR) ? "OFF" : "???",
from, to);
/* There is nothing to do if we have no data about the flash
* or the protect range and flash range don't overlap.
*/
if (info->flash_id == FLASH_UNKNOWN ||
to < info->start[0] || from > b_end) {
return;
}
for (i=0; i<info->sector_count; ++i) {
ulong end; /* last address in current sect */
end = (i == s_end) ? b_end : info->start[i + 1] - 1;
/* Update protection if any part of the sector
* is in the specified range.
*/
if (from <= end && to >= info->start[i]) {
if (flag & FLAG_PROTECT_CLEAR) {
#if defined(CONFIG_SYS_FLASH_PROTECTION)
flash_real_protect(info, i, 0);
#else
info->protect[i] = 0;
#endif /* CONFIG_SYS_FLASH_PROTECTION */
debug ("protect off %d\n", i);
}
else if (flag & FLAG_PROTECT_SET) {
#if defined(CONFIG_SYS_FLASH_PROTECTION)
flash_real_protect(info, i, 1);
#else
info->protect[i] = 1;
#endif /* CONFIG_SYS_FLASH_PROTECTION */
debug ("protect on %d\n", i);
}
}
}
}
/*-----------------------------------------------------------------------
*/
flash_info_t *
addr2info (ulong addr)
{
flash_info_t *info;
int i;
for (i=0, info = &flash_info[0]; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i, ++info) {
if (info->flash_id != FLASH_UNKNOWN &&
addr >= info->start[0] &&
/* WARNING - The '- 1' is needed if the flash
* is at the end of the address space, since
* info->start[0] + info->size wraps back to 0.
* Please don't change this unless you understand this.
*/
addr <= info->start[0] + info->size - 1) {
return (info);
}
}
return (NULL);
}
/*-----------------------------------------------------------------------
* Copy memory to flash.
* Make sure all target addresses are within Flash bounds,
* and no protected sectors are hit.
* Returns:
* ERR_OK 0 - OK
* ERR_TIMEOUT 1 - write timeout
* ERR_NOT_ERASED 2 - Flash not erased
* ERR_PROTECTED 4 - target range includes protected sectors
* ERR_INVAL 8 - target address not in Flash memory
* ERR_ALIGN 16 - target address not aligned on boundary
* (only some targets require alignment)
*/
int
flash_write (char *src, ulong addr, ulong cnt)
{
int i;
ulong end = addr + cnt - 1;
flash_info_t *info_first = addr2info (addr);
flash_info_t *info_last = addr2info (end );
flash_info_t *info;
__maybe_unused char *src_orig = src;
__maybe_unused char *addr_orig = (char *)addr;
__maybe_unused ulong cnt_orig = cnt;
if (cnt == 0) {
return (ERR_OK);
}
if (!info_first || !info_last) {
return (ERR_INVAL);
}
for (info = info_first; info <= info_last; ++info) {
ulong b_end = info->start[0] + info->size; /* bank end addr */
short s_end = info->sector_count - 1;
for (i=0; i<info->sector_count; ++i) {
ulong e_addr = (i == s_end) ? b_end : info->start[i + 1];
if ((end >= info->start[i]) && (addr < e_addr) &&
(info->protect[i] != 0) ) {
return (ERR_PROTECTED);
}
}
}
/* finally write data to flash */
for (info = info_first; info <= info_last && cnt>0; ++info) {
ulong len;
len = info->start[0] + info->size - addr;
if (len > cnt)
len = cnt;
if ((i = write_buff(info, (uchar *)src, addr, len)) != 0) {
return (i);
}
cnt -= len;
addr += len;
src += len;
}
#if defined(CONFIG_FLASH_VERIFY)
if (memcmp(src_orig, addr_orig, cnt_orig)) {
printf("\nVerify failed!\n");
return ERR_PROG_ERROR;
}
#endif /* CONFIG_SYS_FLASH_VERIFY_AFTER_WRITE */
return (ERR_OK);
}
/*-----------------------------------------------------------------------
*/
void flash_perror (int err)
{
switch (err) {
case ERR_OK:
break;
case ERR_TIMEOUT:
puts ("Timeout writing to Flash\n");
break;
case ERR_NOT_ERASED:
puts ("Flash not Erased\n");
break;
case ERR_PROTECTED:
puts ("Can't write to protected Flash sectors\n");
break;
case ERR_INVAL:
puts ("Outside available Flash\n");
break;
case ERR_ALIGN:
puts ("Start and/or end address not on sector boundary\n");
break;
case ERR_UNKNOWN_FLASH_VENDOR:
puts ("Unknown Vendor of Flash\n");
break;
case ERR_UNKNOWN_FLASH_TYPE:
puts ("Unknown Type of Flash\n");
break;
case ERR_PROG_ERROR:
puts ("General Flash Programming Error\n");
break;
case ERR_ABORTED:
puts("Flash Programming Aborted\n");
break;
default:
printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err);
break;
}
}