22 static inline int sd_idle(struct sd_card *card)  in sd_idle()  argument
26 	/* Reset card with CMD0 */  in sd_idle()
32 	return sdhc_request(card->sdhc, &cmd, NULL);  in sd_idle()
41 static int sd_send_interface_condition(struct sd_card *card)  in sd_send_interface_condition()  argument
47 	/* Reset card with CMD0 */  in sd_send_interface_condition()
48 	ret = sd_idle(card);  in sd_send_interface_condition()
50 		LOG_ERR("Card error on CMD0");  in sd_send_interface_condition()
60 	ret = sdhc_request(card->sdhc, &cmd, NULL);  in sd_send_interface_condition()
66 	if (card->host_props.is_spi) {  in sd_send_interface_condition()
72 		LOG_DBG("Legacy card detected, no CMD8 support");  in sd_send_interface_condition()
77 		/* Card does not support 3.3V */  in sd_send_interface_condition()
81 	card->flags |= SD_SDHC_FLAG;  in sd_send_interface_condition()
85 /* Sends CMD59 to enable CRC checking for SD card in SPI mode */
86 static int sd_enable_crc(struct sd_card *card)  in sd_enable_crc()  argument
91 	__ASSERT_NO_MSG(card->host_props.is_spi);  in sd_enable_crc()
97 	return sdhc_request(card->sdhc, &cmd, NULL);  in sd_enable_crc()
100 /* Retries SD and SDIO initialisation until card has valid response to SD CMD8 */
101 static int sd_common_init(struct sd_card *card)  in sd_common_init()  argument
106 	ret = sd_retry(sd_send_interface_condition, card, CONFIG_SD_RETRY_COUNT);  in sd_common_init()
108 		LOG_INF("Card does not support CMD8, assuming legacy card");  in sd_common_init()
109 		return sd_idle(card);  in sd_common_init()
111 		LOG_ERR("Card error on CMD 8");  in sd_common_init()
114 	if (card->host_props.is_spi &&  in sd_common_init()
117 		ret = sd_enable_crc(card);  in sd_common_init()
122 static int sd_init_io(struct sd_card *card)  in sd_init_io()  argument
124 	struct sdhc_io *bus_io = &card->bus_io;  in sd_init_io()
125 	struct sdhc_host_props *host_props = &card->host_props;  in sd_init_io()
151 	/* Toggle power to card to reset it */  in sd_init_io()
152 	LOG_DBG("Resetting power to card");  in sd_init_io()
154 	ret = sdhc_set_io(card->sdhc, bus_io);  in sd_init_io()
156 		LOG_ERR("Could not disable card power via SDHC");  in sd_init_io()
159 	sd_delay(card->host_props.power_delay);  in sd_init_io()
161 	ret = sdhc_set_io(card->sdhc, bus_io);  in sd_init_io()
163 		LOG_ERR("Could not disable card power via SDHC");  in sd_init_io()
166 	/* After reset or init, card voltage should be max HC support */  in sd_init_io()
167 	card->card_voltage = voltage;  in sd_init_io()
168 	/* Reset card flags */  in sd_init_io()
169 	card->flags = 0U;  in sd_init_io()
170 	/* Delay so card can power up */  in sd_init_io()
171 	sd_delay(card->host_props.power_delay);  in sd_init_io()
174 	ret = sdhc_set_io(card->sdhc, bus_io);  in sd_init_io()
185 static int sd_command_init(struct sd_card *card)  in sd_command_init()  argument
190 	 * We must wait 74 clock cycles, per SD spec, to use card after power  in sd_command_init()
197 	 * Start card initialization and identification  in sd_command_init()
202 	ret = sd_common_init(card);  in sd_command_init()
208 	/* Attempt to initialize SDIO card */  in sd_command_init()
209 	if (!sdio_card_init(card)) {  in sd_command_init()
214 	/* Attempt to initialize SDMMC card */  in sd_command_init()
215 	if (!sdmmc_card_init(card)) {  in sd_command_init()
220 	ret = sd_idle(card);  in sd_command_init()
222 		LOG_ERR("Card error on CMD0");  in sd_command_init()
225 	if (!mmc_card_init(card)) {  in sd_command_init()
229 	/* Unknown card type */  in sd_command_init()
233 /* Initializes SD/SDIO card */
234 int sd_init(const struct device *sdhc_dev, struct sd_card *card)  in sd_init()  argument
241 	card->sdhc = sdhc_dev;  in sd_init()
242 	ret = sdhc_get_host_props(card->sdhc, &card->host_props);  in sd_init()
248 	/* init and lock card mutex */  in sd_init()
249 	ret = k_mutex_init(&card->lock);  in sd_init()
251 		LOG_DBG("Could not init card mutex");  in sd_init()
254 	ret = k_mutex_lock(&card->lock, K_MSEC(CONFIG_SD_INIT_TIMEOUT));  in sd_init()
256 		LOG_ERR("Timeout while trying to acquire card mutex");  in sd_init()
261 	ret = sd_init_io(card);  in sd_init()
263 		k_mutex_unlock(&card->lock);  in sd_init()
269 	 * that the card is in a bad state. The return code SD_RESTART  in sd_init()
270 	 * indicates that the initialization left the card in a bad state.  in sd_init()
272 	 * - set card status to error  in sd_init()
273 	 * - re init host I/O (will also toggle power to the SD card)  in sd_init()
276 	 * card is inaccessible  in sd_init()
278 	ret = sd_command_init(card);  in sd_init()
281 		card->status = CARD_ERROR;  in sd_init()
283 		ret = sd_init_io(card);  in sd_init()
286 			k_mutex_unlock(&card->lock);  in sd_init()
289 		ret = sd_command_init(card);  in sd_init()
291 			LOG_ERR("Failed to init SD card after I/O reset");  in sd_init()
292 			k_mutex_unlock(&card->lock);  in sd_init()
297 		k_mutex_unlock(&card->lock);  in sd_init()
298 		card->status = CARD_ERROR;  in sd_init()
301 	/* Card initialization succeeded. */  in sd_init()
302 	card->status = CARD_INITIALIZED;  in sd_init()
303 	/* Unlock card mutex */  in sd_init()
304 	ret = k_mutex_unlock(&card->lock);  in sd_init()
306 		LOG_DBG("Could not unlock card mutex");  in sd_init()
312 /* Return true if card is present, false otherwise */