142 lines
3.0 KiB
C
142 lines
3.0 KiB
C
/*
|
|
* Copyright 2022 NXP
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
/*
|
|
* SDMMC disk driver using zephyr SD subsystem
|
|
*/
|
|
#define DT_DRV_COMPAT zephyr_sdmmc_disk
|
|
|
|
#include <zephyr/sd/sdmmc.h>
|
|
#include <zephyr/drivers/disk.h>
|
|
|
|
|
|
enum sd_status {
|
|
SD_UNINIT,
|
|
SD_ERROR,
|
|
SD_OK,
|
|
};
|
|
|
|
struct sdmmc_config {
|
|
const struct device *host_controller;
|
|
};
|
|
|
|
struct sdmmc_data {
|
|
struct sd_card card;
|
|
enum sd_status status;
|
|
char *name;
|
|
};
|
|
|
|
|
|
static int disk_sdmmc_access_init(struct disk_info *disk)
|
|
{
|
|
const struct device *dev = disk->dev;
|
|
const struct sdmmc_config *cfg = dev->config;
|
|
struct sdmmc_data *data = dev->data;
|
|
int ret;
|
|
|
|
if (data->status == SD_OK) {
|
|
/* Called twice, don't reinit */
|
|
return 0;
|
|
}
|
|
|
|
if (!sd_is_card_present(cfg->host_controller)) {
|
|
return DISK_STATUS_NOMEDIA;
|
|
}
|
|
|
|
ret = sd_init(cfg->host_controller, &data->card);
|
|
if (ret) {
|
|
data->status = SD_ERROR;
|
|
return ret;
|
|
}
|
|
data->status = SD_OK;
|
|
return 0;
|
|
}
|
|
|
|
static int disk_sdmmc_access_status(struct disk_info *disk)
|
|
{
|
|
const struct device *dev = disk->dev;
|
|
const struct sdmmc_config *cfg = dev->config;
|
|
struct sdmmc_data *data = dev->data;
|
|
|
|
if (!sd_is_card_present(cfg->host_controller)) {
|
|
return DISK_STATUS_NOMEDIA;
|
|
}
|
|
if (data->status == SD_OK) {
|
|
return DISK_STATUS_OK;
|
|
} else {
|
|
return DISK_STATUS_UNINIT;
|
|
}
|
|
}
|
|
|
|
static int disk_sdmmc_access_read(struct disk_info *disk, uint8_t *buf,
|
|
uint32_t sector, uint32_t count)
|
|
{
|
|
const struct device *dev = disk->dev;
|
|
struct sdmmc_data *data = dev->data;
|
|
|
|
return sdmmc_read_blocks(&data->card, buf, sector, count);
|
|
}
|
|
|
|
static int disk_sdmmc_access_write(struct disk_info *disk, const uint8_t *buf,
|
|
uint32_t sector, uint32_t count)
|
|
{
|
|
const struct device *dev = disk->dev;
|
|
struct sdmmc_data *data = dev->data;
|
|
|
|
return sdmmc_write_blocks(&data->card, buf, sector, count);
|
|
}
|
|
|
|
static int disk_sdmmc_access_ioctl(struct disk_info *disk, uint8_t cmd, void *buf)
|
|
{
|
|
const struct device *dev = disk->dev;
|
|
struct sdmmc_data *data = dev->data;
|
|
|
|
return sdmmc_ioctl(&data->card, cmd, buf);
|
|
}
|
|
|
|
static const struct disk_operations sdmmc_disk_ops = {
|
|
.init = disk_sdmmc_access_init,
|
|
.status = disk_sdmmc_access_status,
|
|
.read = disk_sdmmc_access_read,
|
|
.write = disk_sdmmc_access_write,
|
|
.ioctl = disk_sdmmc_access_ioctl,
|
|
};
|
|
|
|
static struct disk_info sdmmc_disk = {
|
|
.ops = &sdmmc_disk_ops,
|
|
};
|
|
|
|
static int disk_sdmmc_init(const struct device *dev)
|
|
{
|
|
struct sdmmc_data *data = dev->data;
|
|
|
|
data->status = SD_UNINIT;
|
|
sdmmc_disk.dev = dev;
|
|
sdmmc_disk.name = data->name;
|
|
|
|
return disk_access_register(&sdmmc_disk);
|
|
}
|
|
|
|
#define DISK_ACCESS_SDMMC_INIT(n) \
|
|
static const struct sdmmc_config sdmmc_config_##n = { \
|
|
.host_controller = DEVICE_DT_GET(DT_INST_PARENT(n)), \
|
|
}; \
|
|
\
|
|
static struct sdmmc_data sdmmc_data_##n = { \
|
|
.name = CONFIG_SDMMC_VOLUME_NAME, \
|
|
}; \
|
|
\
|
|
DEVICE_DT_INST_DEFINE(n, \
|
|
&disk_sdmmc_init, \
|
|
NULL, \
|
|
&sdmmc_data_##n, \
|
|
&sdmmc_config_##n, \
|
|
POST_KERNEL, \
|
|
CONFIG_SD_INIT_PRIORITY, \
|
|
NULL);
|
|
|
|
DT_INST_FOREACH_STATUS_OKAY(DISK_ACCESS_SDMMC_INIT)
|