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SD: Implement sdhc_card_busy in SDHC SPI-driver

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Currently, the sdhc_card_busy function is unimplemented in the
SDHC SPI-driver. This causes some functions which rely on f_sync(),
such as fs_close(), to fail as it will timeout the busy-check. This PR
implements sdhc_card_busy by checking if the MISO-line is kept high to
check if the SD-card is idle (not busy).

Solves https://github.com/zephyrproject-rtos/zephyr/issues/49982

Signed-off-by: Ivan Herrera Olivares <ivan.herreraolivares@uantwerpen.be>
This commit is contained in:
Ivan Herrera Olivares 2022-09-07 10:17:52 +02:00 committed by Anas Nashif
parent 0d0f2e94a2
commit 2c2b8c3422
1 changed files with 22 additions and 0 deletions
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22
drivers/sdhc/sdhc_spi.c
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@ -151,6 +151,27 @@ static int sdhc_spi_init_card(const struct device *dev)
return ret;
}
/* Checks if SPI SD card is sending busy signal */
static int sdhc_spi_card_busy(const struct device *dev)
{
const struct sdhc_spi_config *config = dev->config;
struct sdhc_spi_data *data = dev->data;
int ret;
uint8_t response;
ret = sdhc_spi_rx(config->spi_dev, data->spi_cfg, &response, 1);
if (ret) {
return -EIO;
}
if (response == 0xFF) {
return 0;
} else
return 1;
}
/* Waits for SPI SD card to stop sending busy signal */
static int sdhc_spi_wait_unbusy(const struct device *dev,
int timeout_ms,
@ -732,6 +753,7 @@ static struct sdhc_driver_api sdhc_spi_api = {
.get_host_props = sdhc_spi_get_host_props,
.get_card_present = sdhc_spi_get_card_present,
.reset = sdhc_spi_reset,
.card_busy = sdhc_spi_card_busy,
};