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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017-2018 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/obj.h"
#include "py/mperrno.h"
#include "irq.h"
#include "led.h"
#include "storage.h"
#if MICROPY_HW_ENABLE_STORAGE
#if MICROPY_HW_RUNS_FROM_EXT_FLASH
// Disable all interrupts.
#define FLASH_WRITE_ENTER uint32_t atomic_state = MICROPY_BEGIN_ATOMIC_SECTION()
#define FLASH_WRITE_EXIT MICROPY_END_ATOMIC_SECTION(atomic_state)
#else
// Prevent cache flushing and USB access.
#define FLASH_WRITE_ENTER uint32_t basepri = raise_irq_pri(IRQ_PRI_FLASH)
#define FLASH_WRITE_EXIT restore_irq_pri(basepri)
#endif
int32_t spi_bdev_ioctl(spi_bdev_t *bdev, uint32_t op, uint32_t arg) {
switch (op) {
case BDEV_IOCTL_INIT:
bdev->spiflash.config = (const mp_spiflash_config_t *)arg;
mp_spiflash_init(&bdev->spiflash);
bdev->flash_tick_counter_last_write = 0;
return 0;
case BDEV_IOCTL_IRQ_HANDLER: {
int ret = 0;
#if MICROPY_HW_SPIFLASH_ENABLE_CACHE
if ((bdev->spiflash.flags & 1) && HAL_GetTick() - bdev->flash_tick_counter_last_write >= 1000) {
ret = mp_spiflash_cache_flush(&bdev->spiflash);
led_state(PYB_LED_RED, 0); // indicate a clean cache with LED off
}
#endif
return ret;
}
case BDEV_IOCTL_SYNC: {
int ret = 0;
#if MICROPY_HW_SPIFLASH_ENABLE_CACHE
if (bdev->spiflash.flags & 1) {
uint32_t basepri = raise_irq_pri(IRQ_PRI_FLASH); // prevent cache flushing and USB access
ret = mp_spiflash_cache_flush(&bdev->spiflash);
led_state(PYB_LED_RED, 0); // indicate a clean cache with LED off
restore_irq_pri(basepri);
}
#endif
return ret;
}
}
return -MP_EINVAL;
}
#if MICROPY_HW_SPIFLASH_ENABLE_CACHE
int spi_bdev_readblocks(spi_bdev_t *bdev, uint8_t *dest, uint32_t block_num, uint32_t num_blocks) {
uint32_t basepri = raise_irq_pri(IRQ_PRI_FLASH); // prevent cache flushing and USB access
int ret = mp_spiflash_cached_read(&bdev->spiflash, block_num * FLASH_BLOCK_SIZE, num_blocks * FLASH_BLOCK_SIZE, dest);
restore_irq_pri(basepri);
return ret;
}
int spi_bdev_writeblocks(spi_bdev_t *bdev, const uint8_t *src, uint32_t block_num, uint32_t num_blocks) {
uint32_t basepri = raise_irq_pri(IRQ_PRI_FLASH); // prevent cache flushing and USB access
int ret = mp_spiflash_cached_write(&bdev->spiflash, block_num * FLASH_BLOCK_SIZE, num_blocks * FLASH_BLOCK_SIZE, src);
if (bdev->spiflash.flags & 1) {
led_state(PYB_LED_RED, 1); // indicate a dirty cache with LED on
bdev->flash_tick_counter_last_write = HAL_GetTick();
}
restore_irq_pri(basepri);
return ret;
}
#elif FLASH_BLOCK_SIZE == MP_SPIFLASH_ERASE_BLOCK_SIZE
int spi_bdev_readblocks(spi_bdev_t *bdev, uint8_t *dest, uint32_t block_num, uint32_t num_blocks) {
int ret = spi_bdev_readblocks_raw(bdev, dest, block_num, 0, num_blocks * FLASH_BLOCK_SIZE);
return ret;
}
int spi_bdev_writeblocks(spi_bdev_t *bdev, const uint8_t *src, uint32_t block_num, uint32_t num_blocks) {
int ret = spi_bdev_eraseblocks_raw(bdev, block_num, num_blocks * FLASH_BLOCK_SIZE);
if (ret == 0) {
ret = spi_bdev_writeblocks_raw(bdev, src, block_num, 0, num_blocks * FLASH_BLOCK_SIZE);
}
return ret;
}
#endif // MICROPY_HW_SPIFLASH_ENABLE_CACHE
int spi_bdev_readblocks_raw(spi_bdev_t *bdev, uint8_t *dest, uint32_t block_num, uint32_t block_offset, uint32_t num_bytes) {
FLASH_WRITE_ENTER;
int ret = mp_spiflash_read(&bdev->spiflash, block_num * MP_SPIFLASH_ERASE_BLOCK_SIZE + block_offset, num_bytes, dest);
FLASH_WRITE_EXIT;
return ret;
}
int spi_bdev_writeblocks_raw(spi_bdev_t *bdev, const uint8_t *src, uint32_t block_num, uint32_t block_offset, uint32_t num_bytes) {
FLASH_WRITE_ENTER;
int ret = mp_spiflash_write(&bdev->spiflash, block_num * MP_SPIFLASH_ERASE_BLOCK_SIZE + block_offset, num_bytes, src);
FLASH_WRITE_EXIT;
return ret;
}
int spi_bdev_eraseblocks_raw(spi_bdev_t *bdev, uint32_t block_num, uint32_t num_bytes) {
int ret = 0;
while (num_bytes >= MP_SPIFLASH_ERASE_BLOCK_SIZE) {
FLASH_WRITE_ENTER;
ret = mp_spiflash_erase_block(&bdev->spiflash, block_num * MP_SPIFLASH_ERASE_BLOCK_SIZE);
FLASH_WRITE_EXIT;
if (ret) {
break;
}
block_num += 1;
num_bytes -= MP_SPIFLASH_ERASE_BLOCK_SIZE;
}
return ret;
}
#endif
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