circuitpython/ports/mimxrt/machine_sdcard.c

223 lines
8.1 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2021 Philipp Ebensberger
*
* 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 MICROPY_PY_MACHINE_SDCARD
#include "py/runtime.h"
#include "py/mperrno.h"
#include "extmod/vfs.h"
#include "ticks.h"
#include "fsl_cache.h"
#include "sdcard.h"
enum { SDCARD_INIT_ARG_ID };
STATIC const mp_arg_t sdcard_init_allowed_args[] = {
[SDCARD_INIT_ARG_ID] = { MP_QSTR_id, MP_ARG_INT, {.u_int = 1} },
};
STATIC void machine_sdcard_init_helper(mimxrt_sdcard_obj_t *self) {
sdcard_init(self, 198000000UL); // Initialize SDCard Host with 198MHz base clock
sdcard_init_pins(self);
ticks_delay_us64(2ULL * 1000ULL); // Wait 2ms to allow USDHC signals to settle/debounce
}
STATIC mp_obj_t sdcard_obj_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
mp_map_t kw_args;
mp_map_init_fixed_table(&kw_args, n_kw, all_args + n_args);
// Parse args
mp_arg_val_t args[MP_ARRAY_SIZE(sdcard_init_allowed_args)];
mp_arg_parse_all(n_args, all_args, &kw_args, MP_ARRAY_SIZE(sdcard_init_allowed_args), sdcard_init_allowed_args, args);
// Extract arguments
mp_int_t sdcard_id = args[SDCARD_INIT_ARG_ID].u_int;
if (!(1 <= sdcard_id && sdcard_id <= MP_ARRAY_SIZE(mimxrt_sdcard_objs))) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "SDCard(%d) doesn't exist", sdcard_id));
}
mimxrt_sdcard_obj_t *self = &mimxrt_sdcard_objs[(sdcard_id - 1)];
// Initialize SDCard Host
if (!sdcard_state_initialized(self)) {
machine_sdcard_init_helper(self);
}
return MP_OBJ_FROM_PTR(self);
}
// init()
STATIC mp_obj_t machine_sdcard_init(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
mimxrt_sdcard_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
if (!sdcard_state_initialized(self)) {
machine_sdcard_init_helper(self);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_sdcard_init_obj, 1, machine_sdcard_init);
// deinit()
STATIC mp_obj_t machine_sdcard_deinit(mp_obj_t self_in) {
mimxrt_sdcard_obj_t *self = MP_OBJ_TO_PTR(self_in);
sdcard_deinit(self);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_sdcard_deinit_obj, machine_sdcard_deinit);
// readblocks(block_num, buf)
STATIC mp_obj_t machine_sdcard_readblocks(mp_obj_t self_in, mp_obj_t block_num, mp_obj_t buf) {
mp_buffer_info_t bufinfo;
mimxrt_sdcard_obj_t *self = MP_OBJ_TO_PTR(self_in);
mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_WRITE);
if (sdcard_read(self, bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / SDCARD_DEFAULT_BLOCK_SIZE)) {
return MP_OBJ_NEW_SMALL_INT(0);
} else {
return MP_OBJ_NEW_SMALL_INT(-MP_EIO);
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(machine_sdcard_readblocks_obj, machine_sdcard_readblocks);
// present()
STATIC mp_obj_t machine_sdcard_present(mp_obj_t self_in) {
mimxrt_sdcard_obj_t *self = MP_OBJ_TO_PTR(self_in);
return mp_obj_new_bool(sdcard_detect(self));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_sdcard_present_obj, machine_sdcard_present);
STATIC mp_obj_t machine_sdcard_info(mp_obj_t self_in) {
mimxrt_sdcard_obj_t *self = MP_OBJ_TO_PTR(self_in);
if (sdcard_detect(self) && sdcard_state_initialized(self)) {
uint32_t log_block_nbr = self->block_count;
uint32_t log_block_size = self->block_len;
mp_obj_t tuple[2] = {
mp_obj_new_int_from_ull((uint64_t)log_block_nbr * (uint64_t)log_block_size),
mp_obj_new_int_from_uint(log_block_size),
};
return mp_obj_new_tuple(2, tuple);
} else {
return mp_const_none;
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_sdcard_info_obj, machine_sdcard_info);
// writeblocks(block_num, buf)
STATIC mp_obj_t machine_sdcard_writeblocks(mp_obj_t self_in, mp_obj_t block_num, mp_obj_t buf) {
mp_buffer_info_t bufinfo;
mimxrt_sdcard_obj_t *self = MP_OBJ_TO_PTR(self_in);
mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_WRITE);
if (sdcard_write(self, bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / SDCARD_DEFAULT_BLOCK_SIZE)) {
return MP_OBJ_NEW_SMALL_INT(0);
} else {
return MP_OBJ_NEW_SMALL_INT(-MP_EIO);
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(machine_sdcard_writeblocks_obj, machine_sdcard_writeblocks);
// ioctl(op, arg)
STATIC mp_obj_t machine_sdcard_ioctl(mp_obj_t self_in, mp_obj_t cmd_in, mp_obj_t arg_in) {
mimxrt_sdcard_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: {
if (sdcard_detect(self)) {
if (sdcard_power_on(self)) {
return MP_OBJ_NEW_SMALL_INT(0);
} else {
sdcard_power_off(self);
return MP_OBJ_NEW_SMALL_INT(-MP_EIO); // Initialization failed
}
} else {
return MP_OBJ_NEW_SMALL_INT(-MP_EIO); // Initialization failed
}
}
case MP_BLOCKDEV_IOCTL_DEINIT: {
if (sdcard_power_off(self)) {
return MP_OBJ_NEW_SMALL_INT(0);
} else {
return MP_OBJ_NEW_SMALL_INT(-MP_EIO); // Deinitialization failed
}
}
case MP_BLOCKDEV_IOCTL_SYNC: {
return MP_OBJ_NEW_SMALL_INT(0);
}
case MP_BLOCKDEV_IOCTL_BLOCK_COUNT: {
if (sdcard_state_initialized(self)) {
return MP_OBJ_NEW_SMALL_INT(self->block_count);
} else {
return MP_OBJ_NEW_SMALL_INT(-MP_EIO); // Card not initialized
}
}
case MP_BLOCKDEV_IOCTL_BLOCK_SIZE: {
if (sdcard_state_initialized(self)) {
return MP_OBJ_NEW_SMALL_INT(self->block_len);
} else {
return MP_OBJ_NEW_SMALL_INT(-MP_EIO); // Card not initialized
}
}
default: // unknown command
{
return mp_const_none;
}
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(machine_sdcard_ioctl_obj, machine_sdcard_ioctl);
STATIC const mp_rom_map_elem_t sdcard_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_sdcard_init_obj) },
{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&machine_sdcard_deinit_obj) },
{ MP_ROM_QSTR(MP_QSTR_present), MP_ROM_PTR(&machine_sdcard_present_obj) },
{ MP_ROM_QSTR(MP_QSTR_info), MP_ROM_PTR(&machine_sdcard_info_obj) },
// block device protocol
{ MP_ROM_QSTR(MP_QSTR_readblocks), MP_ROM_PTR(&machine_sdcard_readblocks_obj) },
{ MP_ROM_QSTR(MP_QSTR_writeblocks), MP_ROM_PTR(&machine_sdcard_writeblocks_obj) },
{ MP_ROM_QSTR(MP_QSTR_ioctl), MP_ROM_PTR(&machine_sdcard_ioctl_obj) },
};
STATIC MP_DEFINE_CONST_DICT(sdcard_locals_dict, sdcard_locals_dict_table);
const mp_obj_type_t machine_sdcard_type = {
{ &mp_type_type },
.name = MP_QSTR_SDCard,
.make_new = sdcard_obj_make_new,
.locals_dict = (mp_obj_dict_t *)&sdcard_locals_dict,
};
void machine_sdcard_init0(void) {
return;
}
#endif // MICROPY_PY_MACHINE_SDCARD