kopia lustrzana https://github.com/micropython/micropython
167 wiersze
6.0 KiB
C
167 wiersze
6.0 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2024 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.
|
|
*/
|
|
|
|
#if !BUILDING_MBOOT
|
|
|
|
#include "py/runtime.h"
|
|
#include "extmod/vfs.h"
|
|
|
|
#include "storage.h"
|
|
|
|
// Expose the entire external SPI flash as an object with the block protocol.
|
|
|
|
#define FLASH_SIZE (MICROPY_HW_SPIFLASH_OFFSET_BYTES + MICROPY_HW_SPIFLASH_SIZE_BITS / 8)
|
|
#define BLOCK_SIZE (4096)
|
|
|
|
typedef struct _spi_flash_obj_t {
|
|
mp_obj_base_t base;
|
|
uint32_t start; // in bytes
|
|
uint32_t len; // in bytes
|
|
} spi_flash_obj_t;
|
|
|
|
static const mp_obj_type_t spi_flash_type;
|
|
|
|
static void spi_flash_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
|
|
spi_flash_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
mp_printf(print, "SPIFlash(start=%u, len=%u)", self->start, self->len);
|
|
}
|
|
|
|
static mp_obj_t spi_flash_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
|
|
enum { ARG_start, ARG_len };
|
|
static const mp_arg_t allowed_args[] = {
|
|
{ MP_QSTR_start, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
|
|
{ MP_QSTR_len, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
|
};
|
|
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
|
|
mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
|
|
|
|
spi_flash_obj_t *self = mp_obj_malloc(spi_flash_obj_t, &spi_flash_type);
|
|
|
|
mp_int_t start = args[ARG_start].u_int;
|
|
if (!(0 <= start && start < FLASH_SIZE && start % BLOCK_SIZE == 0)) {
|
|
mp_raise_ValueError(NULL);
|
|
}
|
|
|
|
mp_int_t len = args[ARG_len].u_int;
|
|
if (len == -1) {
|
|
len = FLASH_SIZE - start;
|
|
} else if (!(0 < len && start + len <= FLASH_SIZE && len % BLOCK_SIZE == 0)) {
|
|
mp_raise_ValueError(NULL);
|
|
}
|
|
|
|
self->start = start;
|
|
self->len = len;
|
|
|
|
return MP_OBJ_FROM_PTR(self);
|
|
}
|
|
|
|
static mp_obj_t spi_flash_readblocks(size_t n_args, const mp_obj_t *args) {
|
|
spi_flash_obj_t *self = MP_OBJ_TO_PTR(args[0]);
|
|
uint32_t block_num = self->start / BLOCK_SIZE + mp_obj_get_int(args[1]);
|
|
mp_buffer_info_t bufinfo;
|
|
mp_get_buffer_raise(args[2], &bufinfo, MP_BUFFER_WRITE);
|
|
int ret = spi_bdev_readblocks_raw(&spi_bdev, bufinfo.buf, block_num, 0, bufinfo.len);
|
|
return MP_OBJ_NEW_SMALL_INT(ret);
|
|
}
|
|
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(spi_flash_readblocks_obj, 3, 3, spi_flash_readblocks);
|
|
|
|
static mp_obj_t spi_flash_writeblocks(size_t n_args, const mp_obj_t *args) {
|
|
spi_flash_obj_t *self = MP_OBJ_TO_PTR(args[0]);
|
|
uint32_t block_num = self->start / BLOCK_SIZE + mp_obj_get_int(args[1]);
|
|
mp_buffer_info_t bufinfo;
|
|
mp_get_buffer_raise(args[2], &bufinfo, MP_BUFFER_READ);
|
|
int ret = spi_bdev_eraseblocks_raw(&spi_bdev, block_num, bufinfo.len);
|
|
if (ret == 0) {
|
|
ret = spi_bdev_writeblocks_raw(&spi_bdev, bufinfo.buf, block_num, 0, bufinfo.len);
|
|
}
|
|
return MP_OBJ_NEW_SMALL_INT(ret);
|
|
}
|
|
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(spi_flash_writeblocks_obj, 3, 3, spi_flash_writeblocks);
|
|
|
|
static mp_obj_t spi_flash_ioctl(mp_obj_t self_in, mp_obj_t cmd_in, mp_obj_t arg_in) {
|
|
spi_flash_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
|
|
mp_int_t cmd = mp_obj_get_int(cmd_in);
|
|
switch (cmd) {
|
|
case MP_BLOCKDEV_IOCTL_INIT:
|
|
storage_init();
|
|
return MP_OBJ_NEW_SMALL_INT(0);
|
|
|
|
case MP_BLOCKDEV_IOCTL_DEINIT:
|
|
return MP_OBJ_NEW_SMALL_INT(0);
|
|
|
|
case MP_BLOCKDEV_IOCTL_SYNC:
|
|
return MP_OBJ_NEW_SMALL_INT(0);
|
|
|
|
case MP_BLOCKDEV_IOCTL_BLOCK_COUNT: {
|
|
mp_int_t n = self->len / BLOCK_SIZE;
|
|
return MP_OBJ_NEW_SMALL_INT(n);
|
|
}
|
|
|
|
case MP_BLOCKDEV_IOCTL_BLOCK_SIZE:
|
|
return MP_OBJ_NEW_SMALL_INT(BLOCK_SIZE);
|
|
|
|
default:
|
|
return mp_const_none;
|
|
}
|
|
}
|
|
static MP_DEFINE_CONST_FUN_OBJ_3(spi_flash_ioctl_obj, spi_flash_ioctl);
|
|
|
|
static const mp_rom_map_elem_t spi_flash_locals_dict_table[] = {
|
|
{ MP_ROM_QSTR(MP_QSTR_readblocks), MP_ROM_PTR(&spi_flash_readblocks_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_writeblocks), MP_ROM_PTR(&spi_flash_writeblocks_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_ioctl), MP_ROM_PTR(&spi_flash_ioctl_obj) },
|
|
};
|
|
static MP_DEFINE_CONST_DICT(spi_flash_locals_dict, spi_flash_locals_dict_table);
|
|
|
|
static MP_DEFINE_CONST_OBJ_TYPE(
|
|
spi_flash_type,
|
|
MP_QSTR_SPIFlash,
|
|
MP_TYPE_FLAG_NONE,
|
|
make_new, spi_flash_make_new,
|
|
print, spi_flash_print,
|
|
locals_dict, &spi_flash_locals_dict
|
|
);
|
|
|
|
/******************************************************************************/
|
|
// The `spiflash` module.
|
|
|
|
static const mp_rom_map_elem_t spiflash_module_globals_table[] = {
|
|
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_spiflash) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_SPIFlash), MP_ROM_PTR(&spi_flash_type) },
|
|
};
|
|
static MP_DEFINE_CONST_DICT(spiflash_module_globals, spiflash_module_globals_table);
|
|
|
|
const mp_obj_module_t spiflash_module = {
|
|
.base = { &mp_type_module },
|
|
.globals = (mp_obj_dict_t *)&spiflash_module_globals,
|
|
};
|
|
|
|
MP_REGISTER_MODULE(MP_QSTR_spiflash, spiflash_module);
|
|
|
|
#endif
|