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hw/sd.c: Handle illegal commands in sd_do_command 

Add an extra sd_illegal value to the sd_rsp_type_t enum so that
sd_app_command() and sd_normal_command() can tell sd_do_command()
that the command was illegal. This is needed so we can do things
like reset certain status bits only on receipt of a valid command.
For the moment, just use it to pull out the setting of the
ILLEGAL_COMMAND status bit into sd_do_command().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
This commit is contained in:
Peter Maydell 2011-12-18 21:37:55 +01:00 committed by Andrzej Zaborowski
parent e30d59388b
commit 53bb8cc485
1 changed files with 11 additions and 14 deletions
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25
hw/sd.c
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@ -51,6 +51,7 @@ typedef enum {
sd_r6 = 6, /* Published RCA response */
sd_r7, /* Operating voltage */
sd_r1b = -1,
sd_illegal = -2,
} sd_rsp_type_t;
struct SDState {
@ -679,8 +680,7 @@ static sd_rsp_type_t sd_normal_command(SDState *sd,
break;
case 5: /* CMD5: reserved for SDIO cards */
sd->card_status |= ILLEGAL_COMMAND;
return sd_r0;
return sd_illegal;
case 6: /* CMD6: SWITCH_FUNCTION */
if (sd->spi)
@ -1115,8 +1115,7 @@ static sd_rsp_type_t sd_normal_command(SDState *sd,
* on stderr, as some OSes may use these in their
* probing for presence of an SDIO card.
*/
sd->card_status |= ILLEGAL_COMMAND;
return sd_r0;
return sd_illegal;
/* Application specific commands (Class 8) */
case 55: /* CMD55: APP_CMD */
@ -1145,21 +1144,17 @@ static sd_rsp_type_t sd_normal_command(SDState *sd,
default:
bad_cmd:
sd->card_status |= ILLEGAL_COMMAND;
fprintf(stderr, "SD: Unknown CMD%i\n", req.cmd);
return sd_r0;
return sd_illegal;
unimplemented_cmd:
/* Commands that are recognised but not yet implemented in SPI mode. */
sd->card_status |= ILLEGAL_COMMAND;
fprintf(stderr, "SD: CMD%i not implemented in SPI mode\n", req.cmd);
return sd_r0;
return sd_illegal;
}
sd->card_status |= ILLEGAL_COMMAND;
fprintf(stderr, "SD: CMD%i in a wrong state\n", req.cmd);
return sd_r0;
return sd_illegal;
}
static sd_rsp_type_t sd_app_command(SDState *sd,
@ -1321,6 +1316,10 @@ int sd_do_command(SDState *sd, SDRequest *req,
} else
rtype = sd_normal_command(sd, *req);
if (rtype == sd_illegal) {
sd->card_status |= ILLEGAL_COMMAND;
}
sd->current_cmd = req->cmd;
switch (rtype) {
@ -1356,14 +1355,12 @@ int sd_do_command(SDState *sd, SDRequest *req,
break;
case sd_r0:
case sd_illegal:
default:
rsplen = 0;
break;
}
if (sd->card_status & ILLEGAL_COMMAND)
rsplen = 0;
#ifdef DEBUG_SD
if (rsplen) {
int i;