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micropython/ports/cc3200/mods/pybsd.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Daniel Campora
*
* 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/mpconfig.h"
#include "py/obj.h"
#include "py/runtime.h"
#include "py/mperrno.h"
#include "lib/oofatfs/ff.h"
#include "lib/oofatfs/diskio.h"
#include "extmod/vfs_fat.h"
#include "inc/hw_types.h"
#include "inc/hw_gpio.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "rom_map.h"
#include "pin.h"
#include "prcm.h"
#include "gpio.h"
#include "sdhost.h"
#include "sd_diskio.h"
#include "pybsd.h"
#include "mpexception.h"
#include "pybsleep.h"
#include "pybpin.h"
#include "pins.h"
/******************************************************************************
DEFINE PRIVATE CONSTANTS
******************************************************************************/
#define PYBSD_FREQUENCY_HZ 15000000 // 15MHz
/******************************************************************************
DECLARE PUBLIC DATA
******************************************************************************/
pybsd_obj_t pybsd_obj;
/******************************************************************************
DECLARE PRIVATE DATA
******************************************************************************/
STATIC const mp_obj_t pyb_sd_def_pin[3] = {&pin_GP10, &pin_GP11, &pin_GP15};
/******************************************************************************
DECLARE PRIVATE FUNCTIONS
******************************************************************************/
STATIC void pyb_sd_hw_init (pybsd_obj_t *self);
STATIC mp_obj_t pyb_sd_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args);
STATIC mp_obj_t pyb_sd_deinit (mp_obj_t self_in);
/******************************************************************************
DEFINE PRIVATE FUNCTIONS
******************************************************************************/
/// Initalizes the sd card hardware driver
STATIC void pyb_sd_hw_init (pybsd_obj_t *self) {
if (self->pin_clk) {
// Configure the clock pin as output only
MAP_PinDirModeSet(((pin_obj_t *)(self->pin_clk))->pin_num, PIN_DIR_MODE_OUT);
}
// Enable SD peripheral clock
MAP_PRCMPeripheralClkEnable(PRCM_SDHOST, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
// Reset MMCHS
MAP_PRCMPeripheralReset(PRCM_SDHOST);
// Initialize MMCHS
MAP_SDHostInit(SDHOST_BASE);
// Configure the card clock
MAP_SDHostSetExpClk(SDHOST_BASE, MAP_PRCMPeripheralClockGet(PRCM_SDHOST), PYBSD_FREQUENCY_HZ);
// Set card rd/wr block len
MAP_SDHostBlockSizeSet(SDHOST_BASE, SD_SECTOR_SIZE);
self->enabled = true;
}
STATIC mp_obj_t pyb_sd_init_helper (pybsd_obj_t *self, const mp_arg_val_t *args) {
// assign the pins
mp_obj_t pins_o = args[0].u_obj;
if (pins_o != mp_const_none) {
mp_obj_t *pins;
if (pins_o == MP_OBJ_NULL) {
// use the default pins
pins = (mp_obj_t *)pyb_sd_def_pin;
} else {
mp_obj_get_array_fixed_n(pins_o, MP_ARRAY_SIZE(pyb_sd_def_pin), &pins);
}
pin_assign_pins_af (pins, MP_ARRAY_SIZE(pyb_sd_def_pin), PIN_TYPE_STD_PU, PIN_FN_SD, 0);
// save the pins clock
self->pin_clk = pin_find(pins[0]);
}
pyb_sd_hw_init (self);
if (sd_disk_init() != 0) {
mp_raise_OSError(MP_EIO);
}
// register it with the sleep module
pyb_sleep_add ((const mp_obj_t)self, (WakeUpCB_t)pyb_sd_hw_init);
return mp_const_none;
}
/******************************************************************************/
// MicroPython bindings
//
STATIC const mp_arg_t pyb_sd_init_args[] = {
{ MP_QSTR_id, MP_ARG_INT, {.u_int = 0} },
{ MP_QSTR_pins, MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
};
STATIC mp_obj_t pyb_sd_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
// parse args
mp_map_t kw_args;
mp_map_init_fixed_table(&kw_args, n_kw, all_args + n_args);
mp_arg_val_t args[MP_ARRAY_SIZE(pyb_sd_init_args)];
mp_arg_parse_all(n_args, all_args, &kw_args, MP_ARRAY_SIZE(args), pyb_sd_init_args, args);
// check the peripheral id
if (args[0].u_int != 0) {
mp_raise_OSError(MP_ENODEV);
}
// setup and initialize the object
mp_obj_t self = &pybsd_obj;
pybsd_obj.base.type = &pyb_sd_type;
pyb_sd_init_helper (self, &args[1]);
return self;
}
STATIC mp_obj_t pyb_sd_init(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(pyb_sd_init_args) - 1];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(args), &pyb_sd_init_args[1], args);
return pyb_sd_init_helper(pos_args[0], args);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_sd_init_obj, 1, pyb_sd_init);
STATIC mp_obj_t pyb_sd_deinit (mp_obj_t self_in) {
pybsd_obj_t *self = self_in;
// disable the peripheral
self->enabled = false;
MAP_PRCMPeripheralClkDisable(PRCM_SDHOST, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
// de-initialze the sd card at diskio level
sd_disk_deinit();
// unregister it from the sleep module
pyb_sleep_remove (self);
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_sd_deinit_obj, pyb_sd_deinit);
STATIC mp_obj_t pyb_sd_readblocks(mp_obj_t self, mp_obj_t block_num, mp_obj_t buf) {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_WRITE);
DRESULT res = sd_disk_read(bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / SD_SECTOR_SIZE);
return MP_OBJ_NEW_SMALL_INT(res != RES_OK); // return of 0 means success
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(pyb_sd_readblocks_obj, pyb_sd_readblocks);
STATIC mp_obj_t pyb_sd_writeblocks(mp_obj_t self, mp_obj_t block_num, mp_obj_t buf) {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_READ);
DRESULT res = sd_disk_write(bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / SD_SECTOR_SIZE);
return MP_OBJ_NEW_SMALL_INT(res != RES_OK); // return of 0 means success
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(pyb_sd_writeblocks_obj, pyb_sd_writeblocks);
STATIC mp_obj_t pyb_sd_ioctl(mp_obj_t self, mp_obj_t cmd_in, mp_obj_t arg_in) {
mp_int_t cmd = mp_obj_get_int(cmd_in);
switch (cmd) {
case BP_IOCTL_INIT:
case BP_IOCTL_DEINIT:
case BP_IOCTL_SYNC:
// nothing to do
return MP_OBJ_NEW_SMALL_INT(0); // success
case BP_IOCTL_SEC_COUNT:
return MP_OBJ_NEW_SMALL_INT(sd_disk_info.ulNofBlock * (sd_disk_info.ulBlockSize / 512));
case BP_IOCTL_SEC_SIZE:
return MP_OBJ_NEW_SMALL_INT(SD_SECTOR_SIZE);
default: // unknown command
return MP_OBJ_NEW_SMALL_INT(-1); // error
}
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(pyb_sd_ioctl_obj, pyb_sd_ioctl);
STATIC const mp_rom_map_elem_t pyb_sd_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&pyb_sd_init_obj) },
{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&pyb_sd_deinit_obj) },
// block device protocol
{ MP_ROM_QSTR(MP_QSTR_readblocks), MP_ROM_PTR(&pyb_sd_readblocks_obj) },
{ MP_ROM_QSTR(MP_QSTR_writeblocks), MP_ROM_PTR(&pyb_sd_writeblocks_obj) },
{ MP_ROM_QSTR(MP_QSTR_ioctl), MP_ROM_PTR(&pyb_sd_ioctl_obj) },
};
STATIC MP_DEFINE_CONST_DICT(pyb_sd_locals_dict, pyb_sd_locals_dict_table);
const mp_obj_type_t pyb_sd_type = {
{ &mp_type_type },
.name = MP_QSTR_SD,
.make_new = pyb_sd_make_new,
.locals_dict = (mp_obj_t)&pyb_sd_locals_dict,
};
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