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hw/sd: ssi-sd: Use macros for the dummy value and tokens in the transfer 

At present the codes use hardcoded numbers (0xff/0xfe) for the dummy
value and block start token. Replace them with macros.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210123104016.17485-12-bmeng.cn@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
This commit is contained in:
Bin Meng 2021-01-23 18:40:02 +08:00 committed by Philippe Mathieu-Daudé
parent 1fb85c42ca
commit bc1edaf204
1 changed files with 16 additions and 10 deletions
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26
hw/sd/ssi-sd.c
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@ -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)