2  * generic mmc spi driver
12 #include <spi.h>
17 /* MMC/SD in SPI mode reports R1 status always */
41 /* MMC SPI commands start with a start bit "0" and a transmit bit "1" */
55 	struct spi_slave *spi = mmc->priv;  in mmc_spi_sendcmd()  local
66 	spi_xfer(spi, sizeof(cmdo) * 8, cmdo, NULL, 0);  in mmc_spi_sendcmd()
68 		spi_xfer(spi, 1 * 8, NULL, &r1, 0);  in mmc_spi_sendcmd()
79 	struct spi_slave *spi = mmc->priv;  in mmc_spi_readdata()  local
86 			spi_xfer(spi, 1 * 8, NULL, &r1, 0);  in mmc_spi_readdata()
92 			spi_xfer(spi, bsize * 8, NULL, buf, 0);  in mmc_spi_readdata()
93 			spi_xfer(spi, 2 * 8, NULL, &crc, 0);  in mmc_spi_readdata()
114 	struct spi_slave *spi = mmc->priv;  in mmc_spi_writedata()  local
126 		spi_xfer(spi, 2 * 8, tok, NULL, 0);  in mmc_spi_writedata()
127 		spi_xfer(spi, bsize * 8, buf, NULL, 0);  in mmc_spi_writedata()
128 		spi_xfer(spi, 2 * 8, &crc, NULL, 0);  in mmc_spi_writedata()
130 			spi_xfer(spi, 1 * 8, NULL, &r1, 0);  in mmc_spi_writedata()
137 				spi_xfer(spi, 1 * 8, NULL, &r1, 0);  in mmc_spi_writedata()
157 		spi_xfer(spi, 2 * 8, tok, NULL, 0);  in mmc_spi_writedata()
159 			spi_xfer(spi, 1 * 8, NULL, &r1, 0);  in mmc_spi_writedata()
176 	struct spi_slave *spi = mmc->priv;  in mmc_spi_request()  local
182 	spi_claim_bus(spi);  in mmc_spi_request()
183 	spi_cs_activate(spi);  in mmc_spi_request()
208 			spi_xfer(spi, 4 * 8, NULL, cmd->response, 0);  in mmc_spi_request()
213 			spi_xfer(spi, 1 * 8, NULL, cmd->response, 0);  in mmc_spi_request()
234 	spi_cs_deactivate(spi);  in mmc_spi_request()
235 	spi_release_bus(spi);  in mmc_spi_request()
241 	struct spi_slave *spi = mmc->priv;  in mmc_spi_set_ios()  local
245 		spi_set_speed(spi, mmc->clock);  in mmc_spi_set_ios()
251 	struct spi_slave *spi = mmc->priv;  in mmc_spi_init_p()  local
252 	spi_set_speed(spi, MMC_SPI_MIN_CLOCK);  in mmc_spi_init_p()
253 	spi_claim_bus(spi);  in mmc_spi_init_p()
255 	spi_xfer(spi, 18 * 8, NULL, NULL, 0);  in mmc_spi_init_p()
256 	spi_release_bus(spi);  in mmc_spi_init_p()
279 	struct spi_slave *spi;  in mmc_spi_init()  local
281 	spi = spi_setup_slave(bus, cs, speed, mode);  in mmc_spi_init()
282 	if (spi == NULL)  in mmc_spi_init()
287 	mmc = mmc_create(&mmc_spi_cfg, spi);  in mmc_spi_init()
289 		spi_free_slave(spi);  in mmc_spi_init()