esp-idf/components/fatfs/vfs/vfs_fat_sdmmc.c

401 wiersze
12 KiB
C

// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdlib.h>
#include <string.h>
#include "esp_log.h"
#include "esp_vfs.h"
#include "esp_vfs_fat.h"
#include "vfs_fat_internal.h"
#include "driver/sdspi_host.h"
#include "sdmmc_cmd.h"
#include "diskio_impl.h"
#include "diskio_sdmmc.h"
#include "soc/soc_caps.h"
#include "driver/sdmmc_defs.h"
#if SOC_SDMMC_HOST_SUPPORTED
#include "driver/sdmmc_host.h"
#endif
static const char* TAG = "vfs_fat_sdmmc";
static sdmmc_card_t* s_card = NULL;
static uint8_t s_pdrv = FF_DRV_NOT_USED;
static char * s_base_path = NULL;
#define CHECK_EXECUTE_RESULT(err, str) do { \
if ((err) !=ESP_OK) { \
ESP_LOGE(TAG, str" (0x%x).", err); \
goto cleanup; \
} \
} while(0)
static void call_host_deinit(const sdmmc_host_t *host_config);
static esp_err_t partition_card(const esp_vfs_fat_mount_config_t *mount_config,
const char *drv, sdmmc_card_t *card, BYTE pdrv);
static esp_err_t mount_prepare_mem(const char *base_path,
BYTE *out_pdrv,
char **out_dup_path,
sdmmc_card_t** out_card)
{
esp_err_t err = ESP_OK;
char* dup_path = NULL;
sdmmc_card_t* card = NULL;
// connect SDMMC driver to FATFS
BYTE pdrv = FF_DRV_NOT_USED;
if (ff_diskio_get_drive(&pdrv) != ESP_OK || pdrv == FF_DRV_NOT_USED) {
ESP_LOGD(TAG, "the maximum count of volumes is already mounted");
return ESP_ERR_NO_MEM;
}
// not using ff_memalloc here, as allocation in internal RAM is preferred
card = (sdmmc_card_t*)malloc(sizeof(sdmmc_card_t));
if (card == NULL) {
ESP_LOGD(TAG, "could not locate new sdmmc_card_t");
err = ESP_ERR_NO_MEM;
goto cleanup;
}
dup_path = strdup(base_path);
if(!dup_path){
ESP_LOGD(TAG, "could not copy base_path");
err = ESP_ERR_NO_MEM;
goto cleanup;
}
*out_card = card;
*out_pdrv = pdrv;
*out_dup_path = dup_path;
return ESP_OK;
cleanup:
free(card);
free(dup_path);
return err;
}
static esp_err_t mount_to_vfs_fat(const esp_vfs_fat_mount_config_t *mount_config, sdmmc_card_t *card, uint8_t pdrv,
const char *base_path)
{
FATFS* fs = NULL;
esp_err_t err;
ff_diskio_register_sdmmc(pdrv, card);
ESP_LOGD(TAG, "using pdrv=%i", pdrv);
char drv[3] = {(char)('0' + pdrv), ':', 0};
// connect FATFS to VFS
err = esp_vfs_fat_register(base_path, drv, mount_config->max_files, &fs);
if (err == ESP_ERR_INVALID_STATE) {
// it's okay, already registered with VFS
} else if (err != ESP_OK) {
ESP_LOGD(TAG, "esp_vfs_fat_register failed 0x(%x)", err);
goto fail;
}
// Try to mount partition
FRESULT res = f_mount(fs, drv, 1);
if (res != FR_OK) {
err = ESP_FAIL;
ESP_LOGW(TAG, "failed to mount card (%d)", res);
if (!((res == FR_NO_FILESYSTEM || res == FR_INT_ERR)
&& mount_config->format_if_mount_failed)) {
goto fail;
}
err = partition_card(mount_config, drv, card, pdrv);
if (err != ESP_OK) {
goto fail;
}
ESP_LOGW(TAG, "mounting again");
res = f_mount(fs, drv, 0);
if (res != FR_OK) {
err = ESP_FAIL;
ESP_LOGD(TAG, "f_mount failed after formatting (%d)", res);
goto fail;
}
}
return ESP_OK;
fail:
if (fs) {
f_mount(NULL, drv, 0);
}
esp_vfs_fat_unregister_path(base_path);
ff_diskio_unregister(pdrv);
return err;
}
static esp_err_t partition_card(const esp_vfs_fat_mount_config_t *mount_config,
const char *drv, sdmmc_card_t *card, BYTE pdrv)
{
FRESULT res = FR_OK;
esp_err_t err;
const size_t workbuf_size = 4096;
void* workbuf = NULL;
ESP_LOGW(TAG, "partitioning card");
workbuf = ff_memalloc(workbuf_size);
if (workbuf == NULL) {
return ESP_ERR_NO_MEM;
}
DWORD plist[] = {100, 0, 0, 0};
res = f_fdisk(pdrv, plist, workbuf);
if (res != FR_OK) {
err = ESP_FAIL;
ESP_LOGD(TAG, "f_fdisk failed (%d)", res);
goto fail;
}
size_t alloc_unit_size = esp_vfs_fat_get_allocation_unit_size(
card->csd.sector_size,
mount_config->allocation_unit_size);
ESP_LOGW(TAG, "formatting card, allocation unit size=%d", alloc_unit_size);
res = f_mkfs(drv, FM_ANY, alloc_unit_size, workbuf, workbuf_size);
if (res != FR_OK) {
err = ESP_FAIL;
ESP_LOGD(TAG, "f_mkfs failed (%d)", res);
goto fail;
}
free(workbuf);
return ESP_OK;
fail:
free(workbuf);
return err;
}
#if SOC_SDMMC_HOST_SUPPORTED
static esp_err_t init_sdmmc_host(int slot, const void *slot_config, int *out_slot)
{
*out_slot = slot;
return sdmmc_host_init_slot(slot, (const sdmmc_slot_config_t*) slot_config);
}
static esp_err_t init_sdspi_host_deprecated(int slot, const void *slot_config, int *out_slot)
{
*out_slot = slot;
return sdspi_host_init_slot(slot, (const sdspi_slot_config_t*) slot_config);
}
esp_err_t esp_vfs_fat_sdmmc_mount(const char* base_path,
const sdmmc_host_t* host_config,
const void* slot_config,
const esp_vfs_fat_mount_config_t* mount_config,
sdmmc_card_t** out_card)
{
esp_err_t err;
int card_handle = -1; //uninitialized
sdmmc_card_t* card = NULL;
BYTE pdrv = FF_DRV_NOT_USED;
char* dup_path = NULL;
bool host_inited = false;
err = mount_prepare_mem(base_path, &pdrv, &dup_path, &card);
if (err != ESP_OK) {
ESP_LOGE(TAG, "mount_prepare failed");
return err;
}
if (host_config->flags == SDMMC_HOST_FLAG_SPI) {
//Deprecated API
//the init() function is usually empty, doesn't require any deinit to revert it
err = (*host_config->init)();
CHECK_EXECUTE_RESULT(err, "host init failed");
err = init_sdspi_host_deprecated(host_config->slot, slot_config, &card_handle);
CHECK_EXECUTE_RESULT(err, "slot init failed");
//Set `host_inited` to true to indicate that host_config->deinit() needs
//to be called to revert `init_sdspi_host_deprecated`; set `card_handle`
//to -1 to indicate that no other deinit is required.
host_inited = true;
card_handle = -1;
} else {
err = (*host_config->init)();
CHECK_EXECUTE_RESULT(err, "host init failed");
//deinit() needs to be called to revert the init
host_inited = true;
//If this failed (indicated by card_handle != -1), slot deinit needs to called()
//leave card_handle as is to indicate that (though slot deinit not implemented yet.
err = init_sdmmc_host(host_config->slot, slot_config, &card_handle);
CHECK_EXECUTE_RESULT(err, "slot init failed");
}
// probe and initialize card
err = sdmmc_card_init(host_config, card);
CHECK_EXECUTE_RESULT(err, "sdmmc_card_init failed");
err = mount_to_vfs_fat(mount_config, card, pdrv, dup_path);
CHECK_EXECUTE_RESULT(err, "mount_to_vfs failed");
if (out_card != NULL) {
*out_card = card;
}
if (s_card == NULL) {
//store the ctx locally to be back-compatible
s_card = card;
s_pdrv = pdrv;
s_base_path = dup_path;
} else {
free(dup_path);
}
return ESP_OK;
cleanup:
if (host_inited) {
call_host_deinit(host_config);
}
free(card);
free(dup_path);
return err;
}
#endif
static esp_err_t init_sdspi_host(int slot, const void *slot_config, int *out_slot)
{
esp_err_t err = sdspi_host_init_device((const sdspi_device_config_t*)slot_config, out_slot);
if (err != ESP_OK) {
ESP_LOGE(TAG,
"Failed to attach sdspi device onto an SPI bus (rc=0x%x), please initialize the \
bus first and check the device parameters."
, err);
}
return err;
}
esp_err_t esp_vfs_fat_sdspi_mount(const char* base_path,
const sdmmc_host_t* host_config_input,
const sdspi_device_config_t* slot_config,
const esp_vfs_fat_mount_config_t* mount_config,
sdmmc_card_t** out_card)
{
const sdmmc_host_t* host_config = host_config_input;
esp_err_t err;
int card_handle = -1; //uninitialized
bool host_inited = false;
BYTE pdrv = FF_DRV_NOT_USED;
sdmmc_card_t* card = NULL;
char* dup_path = NULL;
err = mount_prepare_mem(base_path, &pdrv, &dup_path, &card);
if (err != ESP_OK) {
ESP_LOGE(TAG, "mount_prepare failed");
return err;
}
//the init() function is usually empty, doesn't require any deinit to revert it
err = (*host_config->init)();
CHECK_EXECUTE_RESULT(err, "host init failed");
err = init_sdspi_host(host_config->slot, slot_config, &card_handle);
CHECK_EXECUTE_RESULT(err, "slot init failed");
//Set `host_inited` to true to indicate that host_config->deinit() needs
//to be called to revert `init_sdspi_host`
host_inited = true;
/*
* The `slot` argument inside host_config should be replaced by the SD SPI handled returned
* above. But the input pointer is const, so create a new variable.
*/
sdmmc_host_t new_config;
if (card_handle != host_config->slot) {
new_config = *host_config_input;
host_config = &new_config;
new_config.slot = card_handle;
}
// probe and initialize card
err = sdmmc_card_init(host_config, card);
CHECK_EXECUTE_RESULT(err, "sdmmc_card_init failed");
err = mount_to_vfs_fat(mount_config, card, pdrv, dup_path);
CHECK_EXECUTE_RESULT(err, "mount_to_vfs failed");
if (out_card != NULL) {
*out_card = card;
}
if (s_card == NULL) {
//store the ctx locally to be back-compatible
s_card = card;
s_pdrv = pdrv;
s_base_path = dup_path;
} else {
free(dup_path);
}
return ESP_OK;
cleanup:
if (host_inited) {
call_host_deinit(host_config);
}
free(card);
free(dup_path);
return err;
}
static void local_card_remove(void)
{
s_card = NULL;
free(s_base_path);
s_base_path = NULL;
s_pdrv = FF_DRV_NOT_USED;
}
static void call_host_deinit(const sdmmc_host_t *host_config)
{
if (host_config->flags & SDMMC_HOST_FLAG_DEINIT_ARG) {
host_config->deinit_p(host_config->slot);
} else {
host_config->deinit();
}
}
static esp_err_t unmount_card_core(const char *base_path, sdmmc_card_t *card)
{
BYTE pdrv = ff_diskio_get_pdrv_card(card);
if (pdrv == 0xff) {
return ESP_ERR_INVALID_ARG;
}
// unmount
char drv[3] = {(char)('0' + pdrv), ':', 0};
f_mount(0, drv, 0);
// release SD driver
ff_diskio_unregister(pdrv);
call_host_deinit(&card->host);
free(card);
esp_err_t err = esp_vfs_fat_unregister_path(base_path);
return err;
}
esp_err_t esp_vfs_fat_sdmmc_unmount(void)
{
sdmmc_card_t* card = s_card;
esp_err_t err = unmount_card_core(s_base_path, card);
local_card_remove();
return err;
}
esp_err_t esp_vfs_fat_sdcard_unmount(const char *base_path, sdmmc_card_t *card)
{
esp_err_t err = unmount_card_core(base_path, card);
if (s_card == card) {
local_card_remove();
}
return err;
}