diff options
| -rw-r--r-- | hw/sd/ssi-sd.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/hw/sd/ssi-sd.c b/hw/sd/ssi-sd.c index 12dffb6f55..be1bb10164 100644 --- a/hw/sd/ssi-sd.c +++ b/hw/sd/ssi-sd.c @@ -78,6 +78,12 @@ OBJECT_DECLARE_SIMPLE_TYPE(ssi_sd_state, SSI_SD) #define SSI_SDR_ADDRESS_ERROR 0x2000 #define SSI_SDR_PARAMETER_ERROR 0x4000 +/* single block read/write, multiple block read */ +#define SSI_TOKEN_SINGLE 0xfe + +/* dummy value - don't care */ +#define SSI_DUMMY 0xff + static uint32_t ssi_sd_transfer(SSIPeripheral *dev, uint32_t val) { ssi_sd_state *s = SSI_SD(dev); @@ -91,14 +97,14 @@ static uint32_t ssi_sd_transfer(SSIPeripheral *dev, uint32_t val) switch (s->mode) { case SSI_SD_CMD: - if (val == 0xff) { + if (val == SSI_DUMMY) { DPRINTF("NULL command\n"); - return 0xff; + return SSI_DUMMY; } s->cmd = val & 0x3f; s->mode = SSI_SD_CMDARG; s->arglen = 0; - return 0xff; + return SSI_DUMMY; case SSI_SD_CMDARG: if (s->arglen == 4) { SDRequest request; @@ -173,15 +179,15 @@ static uint32_t ssi_sd_transfer(SSIPeripheral *dev, uint32_t val) } else { s->cmdarg[s->arglen++] = val; } - return 0xff; + return SSI_DUMMY; case SSI_SD_PREP_RESP: DPRINTF("Prepare card response (Ncr)\n"); s->mode = SSI_SD_RESPONSE; - return 0xff; + return SSI_DUMMY; case SSI_SD_RESPONSE: if (s->stopping) { s->stopping = 0; - return 0xff; + return SSI_DUMMY; } if (s->response_pos < s->arglen) { DPRINTF("Response 0x%02x\n", s->response[s->response_pos]); @@ -194,16 +200,16 @@ static uint32_t ssi_sd_transfer(SSIPeripheral *dev, uint32_t val) DPRINTF("End of command\n"); s->mode = SSI_SD_CMD; } - return 0xff; + return SSI_DUMMY; case SSI_SD_PREP_DATA: DPRINTF("Prepare data block (Nac)\n"); s->mode = SSI_SD_DATA_START; - return 0xff; + return SSI_DUMMY; case SSI_SD_DATA_START: DPRINTF("Start read block\n"); s->mode = SSI_SD_DATA_READ; s->response_pos = 0; - return 0xfe; + return SSI_TOKEN_SINGLE; case SSI_SD_DATA_READ: val = sdbus_read_byte(&s->sdbus); s->crc16 = crc_ccitt_false(s->crc16, (uint8_t *)&val, 1); @@ -224,7 +230,7 @@ static uint32_t ssi_sd_transfer(SSIPeripheral *dev, uint32_t val) return val; } /* Should never happen. */ - return 0xff; + return SSI_DUMMY; } static int ssi_sd_post_load(void *opaque, int version_id) |