mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

hw/sd/sdcard: Add sd_acmd_SD_APP_OP_COND handler (ACMD41)

Browse Source 
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: <20240628070216.92609-73-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2024-06-12 23:46:39 +02:00
parent f443003ff4
commit c79cbe44ec
1 changed files with 45 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

82
hw/sd/sd.c
View File

@ -1685,6 +1685,50 @@ static sd_rsp_type_t sd_acmd_SET_WR_BLK_ERASE_COUNT(SDState *sd, SDRequest req)
return sd_r1;
}
/* ACMD41 */
static sd_rsp_type_t sd_acmd_SD_APP_OP_COND(SDState *sd, SDRequest req)
{
if (sd->state != sd_idle_state) {
return sd_invalid_state_for_cmd(sd, req);
}
/*
* If it's the first ACMD41 since reset, we need to decide
* whether to power up. If this is not an enquiry ACMD41,
* we immediately report power on and proceed below to the
* ready state, but if it is, we set a timer to model a
* delay for power up. This works around a bug in EDK2
* UEFI, which sends an initial enquiry ACMD41, but
* assumes that the card is in ready state as soon as it
* sees the power up bit set.
*/
if (!FIELD_EX32(sd->ocr, OCR, CARD_POWER_UP)) {
if ((req.arg & ACMD41_ENQUIRY_MASK) != 0) {
timer_del(sd->ocr_power_timer);
sd_ocr_powerup(sd);
} else {
trace_sdcard_inquiry_cmd41();
if (!timer_pending(sd->ocr_power_timer)) {
timer_mod_ns(sd->ocr_power_timer,
(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)
+ OCR_POWER_DELAY_NS));
}
}
}
if (FIELD_EX32(sd->ocr & req.arg, OCR, VDD_VOLTAGE_WINDOW)) {
/*
* We accept any voltage. 10000 V is nothing.
*
* Once we're powered up, we advance straight to ready state
* unless it's an enquiry ACMD41 (bits 23:0 == 0).
*/
sd->state = sd_ready_state;
}
return sd_r3;
}
static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req)
{
uint64_t addr;
@ -1809,43 +1853,6 @@ static sd_rsp_type_t sd_app_command(SDState *sd,
}
switch (req.cmd) {
case 41: /* ACMD41: SD_APP_OP_COND */
if (sd->state != sd_idle_state) {
break;
}
/* If it's the first ACMD41 since reset, we need to decide
* whether to power up. If this is not an enquiry ACMD41,
* we immediately report power on and proceed below to the
* ready state, but if it is, we set a timer to model a
* delay for power up. This works around a bug in EDK2
* UEFI, which sends an initial enquiry ACMD41, but
* assumes that the card is in ready state as soon as it
* sees the power up bit set. */
if (!FIELD_EX32(sd->ocr, OCR, CARD_POWER_UP)) {
if ((req.arg & ACMD41_ENQUIRY_MASK) != 0) {
timer_del(sd->ocr_power_timer);
sd_ocr_powerup(sd);
} else {
trace_sdcard_inquiry_cmd41();
if (!timer_pending(sd->ocr_power_timer)) {
timer_mod_ns(sd->ocr_power_timer,
(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)
+ OCR_POWER_DELAY_NS));
}
}
}
if (FIELD_EX32(sd->ocr & req.arg, OCR, VDD_VOLTAGE_WINDOW)) {
/* We accept any voltage. 10000 V is nothing.
*
* Once we're powered up, we advance straight to ready state
* unless it's an enquiry ACMD41 (bits 23:0 == 0).
*/
sd->state = sd_ready_state;
}
return sd_r3;
case 42: /* ACMD42: SET_CLR_CARD_DETECT */
switch (sd->state) {
case sd_transfer_state:
@ -2384,6 +2391,7 @@ static const SDProto sd_proto_sd = {
[13] = {8, sd_adtc, "SD_STATUS", sd_acmd_SD_STATUS},
[22] = {8, sd_adtc, "SEND_NUM_WR_BLOCKS", sd_acmd_SEND_NUM_WR_BLOCKS},
[23] = {8, sd_ac, "SET_WR_BLK_ERASE_COUNT", sd_acmd_SET_WR_BLK_ERASE_COUNT},
[41] = {8, sd_bcr, "SD_APP_OP_COND", sd_acmd_SD_APP_OP_COND},
},
};