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hw/sd/sdcard: Implement eMMC sleep state (CMD5) 

The JEDEC standards specifies a sleep state where the eMMC won't
answer any command appart from RESET and WAKEUP and go to low power
state.  Implement this state and the corresponding command number 5.

Signed-off-by: Luc Michel <luc.michel@amd.com>
Signed-off-by: Francisco Iglesias <francisco.iglesias@amd.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Message-Id: <20240712162719.88165-8-philmd@linaro.org>
This commit is contained in:
Luc Michel 2024-02-20 12:17:18 +01:00 committed by Philippe Mathieu-Daudé
parent b13b29ed38
commit cfde1788dd
1 changed files with 45 additions and 2 deletions
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47
hw/sd/sd.c
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@ -1236,8 +1236,19 @@ static sd_rsp_type_t sd_cmd_to_sendingdata(SDState *sd, SDRequest req,
/* CMD0 */
static sd_rsp_type_t sd_cmd_GO_IDLE_STATE(SDState *sd, SDRequest req)
{
sd->state = sd_idle_state;
sd_reset(DEVICE(sd));
if (sd->state == sd_sleep_state) {
switch (req.arg) {
case 0x00000000:
case 0xf0f0f0f0:
break;
default:
return sd_r0;
}
}
if (sd->state != sd_inactive_state) {
sd->state = sd_idle_state;
sd_reset(DEVICE(sd));
}
return sd_is_spi(sd) ? sd_r1 : sd_r0;
}
@ -1294,6 +1305,30 @@ static sd_rsp_type_t emmc_cmd_SET_RELATIVE_ADDR(SDState *sd, SDRequest req)
}
}
/* CMD5 */
static sd_rsp_type_t emmc_cmd_sleep_awake(SDState *sd, SDRequest req)
{
bool do_sleep = extract32(req.arg, 15, 1);
switch (sd->state) {
case sd_sleep_state:
if (!do_sleep) {
/* Awake */
sd->state = sd_standby_state;
}
return sd_r1b;
case sd_standby_state:
if (do_sleep) {
sd->state = sd_sleep_state;
}
return sd_r1b;
default:
return sd_invalid_state_for_cmd(sd, req);
}
}
/* CMD6 */
static sd_rsp_type_t sd_cmd_SWITCH_FUNCTION(SDState *sd, SDRequest req)
{
@ -1696,6 +1731,7 @@ static sd_rsp_type_t sd_cmd_APP_CMD(SDState *sd, SDRequest req)
case sd_ready_state:
case sd_identification_state:
case sd_inactive_state:
case sd_sleep_state:
return sd_invalid_state_for_cmd(sd, req);
case sd_idle_state:
if (!sd_is_spi(sd) && sd_req_get_rca(sd, req) != 0x0000) {
@ -2018,6 +2054,12 @@ int sd_do_command(SDState *sd, SDRequest *req,
req->cmd &= 0x3f;
}
if (sd->state == sd_sleep_state && req->cmd) {
qemu_log_mask(LOG_GUEST_ERROR, "SD: Card is sleeping\n");
rtype = sd_r0;
goto send_response;
}
if (sd->card_status & CARD_IS_LOCKED) {
if (!cmd_valid_while_locked(sd, req->cmd)) {
sd->card_status |= ILLEGAL_COMMAND;
@ -2467,6 +2509,7 @@ static const SDProto sd_proto_emmc = {
[2] = {0, sd_bcr, "ALL_SEND_CID", sd_cmd_ALL_SEND_CID},
[3] = {0, sd_ac, "SET_RELATIVE_ADDR", emmc_cmd_SET_RELATIVE_ADDR},
[4] = {0, sd_bc, "SEND_DSR", sd_cmd_unimplemented},
[5] = {0, sd_ac, "SLEEP/AWAKE", emmc_cmd_sleep_awake},
[7] = {0, sd_ac, "(DE)SELECT_CARD", sd_cmd_DE_SELECT_CARD},
[9] = {0, sd_ac, "SEND_CSD", sd_cmd_SEND_CSD},
[10] = {0, sd_ac, "SEND_CID", sd_cmd_SEND_CID},