u-boot/drivers/mtd/stm32_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

150 lines
3.4 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2015
* Kamil Lulko, <kamil.lulko@gmail.com>
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/stm32.h>
#include "stm32_flash.h"
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
#define STM32_FLASH ((struct stm32_flash_regs *)STM32_FLASH_CNTL_BASE)
void stm32_flash_latency_cfg(int latency)
{
/* 5 wait states, Prefetch enabled, D-Cache enabled, I-Cache enabled */
writel(FLASH_ACR_WS(latency) | FLASH_ACR_PRFTEN | FLASH_ACR_ICEN
| FLASH_ACR_DCEN, &STM32_FLASH->acr);
}
static void stm32_flash_lock(u8 lock)
{
if (lock) {
setbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_LOCK);
} else {
writel(STM32_FLASH_KEY1, &STM32_FLASH->key);
writel(STM32_FLASH_KEY2, &STM32_FLASH->key);
}
}
unsigned long flash_init(void)
{
unsigned long total_size = 0;
u8 i, j;
for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
flash_info[i].flash_id = FLASH_STM32;
flash_info[i].sector_count = CONFIG_SYS_MAX_FLASH_SECT;
flash_info[i].start[0] = CONFIG_SYS_FLASH_BASE + (i << 20);
flash_info[i].size = sect_sz_kb[0];
for (j = 1; j < CONFIG_SYS_MAX_FLASH_SECT; j++) {
flash_info[i].start[j] = flash_info[i].start[j - 1]
+ (sect_sz_kb[j - 1]);
flash_info[i].size += sect_sz_kb[j];
}
total_size += flash_info[i].size;
}
return total_size;
}
void flash_print_info(flash_info_t *info)
{
int i;
if (info->flash_id == FLASH_UNKNOWN) {
printf("missing or unknown FLASH type\n");
return;
} else if (info->flash_id == FLASH_STM32) {
printf("stm32 Embedded Flash\n");
}
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;
}
int flash_erase(flash_info_t *info, int first, int last)
{
u8 bank = 0xFF;
int i;
for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; i++) {
if (info == &flash_info[i]) {
bank = i;
break;
}
}
if (bank == 0xFF)
return -1;
stm32_flash_lock(0);
for (i = first; i <= last; i++) {
while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY)
;
/* clear old sector number before writing a new one */
clrbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_SNB_MASK);
if (bank == 0) {
setbits_le32(&STM32_FLASH->cr,
(i << STM32_FLASH_CR_SNB_OFFSET));
} else if (bank == 1) {
setbits_le32(&STM32_FLASH->cr,
((0x10 | i) << STM32_FLASH_CR_SNB_OFFSET));
} else {
stm32_flash_lock(1);
return -1;
}
setbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_SER);
setbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_STRT);
while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY)
;
clrbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_SER);
}
stm32_flash_lock(1);
return 0;
}
int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong i;
while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY)
;
stm32_flash_lock(0);
setbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_PG);
/* To make things simple use byte writes only */
for (i = 0; i < cnt; i++) {
*(uchar *)(addr + i) = src[i];
/* avoid re-ordering flash data write and busy status
* check as flash memory space attributes are generally Normal
*/
mb();
while (readl(&STM32_FLASH->sr) & STM32_FLASH_SR_BSY)
;
}
clrbits_le32(&STM32_FLASH->cr, STM32_FLASH_CR_PG);
stm32_flash_lock(1);
return 0;
}