148 lines
5.7 KiB
C
148 lines
5.7 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2020-2021 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <string.h>
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#include "py/runtime.h"
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#include "extmod/vfs.h"
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#include "modrp2.h"
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#include "hardware/flash.h"
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#include "pico/binary_info.h"
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#define BLOCK_SIZE_BYTES (FLASH_SECTOR_SIZE)
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#ifndef MICROPY_HW_FLASH_STORAGE_BYTES
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#define MICROPY_HW_FLASH_STORAGE_BYTES (1408 * 1024)
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#endif
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#ifndef MICROPY_HW_FLASH_STORAGE_BASE
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#define MICROPY_HW_FLASH_STORAGE_BASE (PICO_FLASH_SIZE_BYTES - MICROPY_HW_FLASH_STORAGE_BYTES)
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#endif
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static_assert(MICROPY_HW_FLASH_STORAGE_BYTES <= PICO_FLASH_SIZE_BYTES, "MICROPY_HW_FLASH_STORAGE_BYTES too big");
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static_assert(MICROPY_HW_FLASH_STORAGE_BASE + MICROPY_HW_FLASH_STORAGE_BYTES <= PICO_FLASH_SIZE_BYTES, "MICROPY_HW_FLASH_STORAGE_BYTES too big");
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typedef struct _rp2_flash_obj_t {
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mp_obj_base_t base;
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uint32_t flash_base;
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uint32_t flash_size;
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} rp2_flash_obj_t;
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STATIC rp2_flash_obj_t rp2_flash_obj = {
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.base = { &rp2_flash_type },
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.flash_base = MICROPY_HW_FLASH_STORAGE_BASE,
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.flash_size = MICROPY_HW_FLASH_STORAGE_BYTES,
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};
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// Tag the flash drive in the binary as readable/writable (but not reformatable)
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bi_decl(bi_block_device(
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BINARY_INFO_TAG_MICROPYTHON,
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"MicroPython",
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XIP_BASE + MICROPY_HW_FLASH_STORAGE_BASE,
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MICROPY_HW_FLASH_STORAGE_BYTES,
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NULL,
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BINARY_INFO_BLOCK_DEV_FLAG_READ |
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BINARY_INFO_BLOCK_DEV_FLAG_WRITE |
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BINARY_INFO_BLOCK_DEV_FLAG_PT_UNKNOWN));
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STATIC mp_obj_t rp2_flash_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
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// Check args.
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mp_arg_check_num(n_args, n_kw, 0, 0, false);
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// Return singleton object.
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return MP_OBJ_FROM_PTR(&rp2_flash_obj);
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}
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STATIC mp_obj_t rp2_flash_readblocks(size_t n_args, const mp_obj_t *args) {
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rp2_flash_obj_t *self = MP_OBJ_TO_PTR(args[0]);
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uint32_t offset = mp_obj_get_int(args[1]) * BLOCK_SIZE_BYTES;
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(args[2], &bufinfo, MP_BUFFER_WRITE);
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if (n_args == 4) {
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offset += mp_obj_get_int(args[3]);
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}
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memcpy(bufinfo.buf, (void *)(XIP_BASE + self->flash_base + offset), bufinfo.len);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(rp2_flash_readblocks_obj, 3, 4, rp2_flash_readblocks);
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STATIC mp_obj_t rp2_flash_writeblocks(size_t n_args, const mp_obj_t *args) {
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rp2_flash_obj_t *self = MP_OBJ_TO_PTR(args[0]);
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uint32_t offset = mp_obj_get_int(args[1]) * BLOCK_SIZE_BYTES;
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(args[2], &bufinfo, MP_BUFFER_READ);
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if (n_args == 3) {
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flash_range_erase(self->flash_base + offset, bufinfo.len);
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// TODO check return value
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} else {
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offset += mp_obj_get_int(args[3]);
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}
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flash_range_program(self->flash_base + offset, bufinfo.buf, bufinfo.len);
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// TODO check return value
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(rp2_flash_writeblocks_obj, 3, 4, rp2_flash_writeblocks);
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STATIC mp_obj_t rp2_flash_ioctl(mp_obj_t self_in, mp_obj_t cmd_in, mp_obj_t arg_in) {
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rp2_flash_obj_t *self = MP_OBJ_TO_PTR(self_in);
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mp_int_t cmd = mp_obj_get_int(cmd_in);
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switch (cmd) {
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case MP_BLOCKDEV_IOCTL_INIT:
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return MP_OBJ_NEW_SMALL_INT(0);
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case MP_BLOCKDEV_IOCTL_DEINIT:
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return MP_OBJ_NEW_SMALL_INT(0);
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case MP_BLOCKDEV_IOCTL_SYNC:
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return MP_OBJ_NEW_SMALL_INT(0);
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case MP_BLOCKDEV_IOCTL_BLOCK_COUNT:
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return MP_OBJ_NEW_SMALL_INT(self->flash_size / BLOCK_SIZE_BYTES);
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case MP_BLOCKDEV_IOCTL_BLOCK_SIZE:
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return MP_OBJ_NEW_SMALL_INT(BLOCK_SIZE_BYTES);
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case MP_BLOCKDEV_IOCTL_BLOCK_ERASE: {
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uint32_t offset = mp_obj_get_int(arg_in) * BLOCK_SIZE_BYTES;
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flash_range_erase(self->flash_base + offset, BLOCK_SIZE_BYTES);
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// TODO check return value
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return MP_OBJ_NEW_SMALL_INT(0);
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}
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default:
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return mp_const_none;
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}
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_3(rp2_flash_ioctl_obj, rp2_flash_ioctl);
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STATIC const mp_rom_map_elem_t rp2_flash_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_readblocks), MP_ROM_PTR(&rp2_flash_readblocks_obj) },
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{ MP_ROM_QSTR(MP_QSTR_writeblocks), MP_ROM_PTR(&rp2_flash_writeblocks_obj) },
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{ MP_ROM_QSTR(MP_QSTR_ioctl), MP_ROM_PTR(&rp2_flash_ioctl_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(rp2_flash_locals_dict, rp2_flash_locals_dict_table);
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const mp_obj_type_t rp2_flash_type = {
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{ &mp_type_type },
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.name = MP_QSTR_Flash,
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.make_new = rp2_flash_make_new,
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.locals_dict = (mp_obj_dict_t *)&rp2_flash_locals_dict,
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};
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