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sdhci: implement UHS-I voltage switch

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[based on a patch from Alistair Francis <alistair.francis@xilinx.com>
 from qemu/xilinx tag xilinx-v2015.2]
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-Id: <20180208164818.7961-22-f4bug@amsat.org>
This commit is contained in:
Philippe Mathieu-Daudé 2018-02-08 13:48:09 -03:00 • committed by Paolo Bonzini
parent 238cd93567
commit 0034ebe6ee
6 changed files with 55 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

13
hw/sd/core.c
View file

@ -41,6 +41,19 @@ static SDState *get_card(SDBus *sdbus)
return SD_CARD(kid->child);
}
void sdbus_set_voltage(SDBus *sdbus, uint16_t millivolts)
{
SDState *card = get_card(sdbus);
trace_sdbus_set_voltage(sdbus_name(sdbus), millivolts);
if (card) {
SDCardClass *sc = SD_CARD_GET_CLASS(card);
assert(sc->set_voltage);
sc->set_voltage(card, millivolts);
}
}
int sdbus_do_command(SDBus *sdbus, SDRequest *req, uint8_t *response)
{
SDState *card = get_card(sdbus);

13
hw/sd/sd.c
View file

@ -128,6 +128,18 @@ struct SDState {
bool enable;
};
static void sd_set_voltage(SDState *sd, uint16_t millivolts)
{
switch (millivolts) {
case 3001 ... 3600: /* SD_VOLTAGE_3_3V */
case 2001 ... 3000: /* SD_VOLTAGE_3_0V */
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "SD card voltage not supported: %.3fV",
millivolts / 1000.f);
}
}
static void sd_set_mode(SDState *sd)
{
switch (sd->state) {
@ -1926,6 +1938,7 @@ static void sd_class_init(ObjectClass *klass, void *data)
dc->reset = sd_reset;
dc->bus_type = TYPE_SD_BUS;
sc->set_voltage = sd_set_voltage;
sc->do_command = sd_do_command;
sc->write_data = sd_write_data;
sc->read_data = sd_read_data;

12
hw/sd/sdhci.c
View file

@ -1255,7 +1255,16 @@ sdhci_write(void *opaque, hwaddr offset, uint64_t val, unsigned size)
sdhci_update_irq(s);
break;
case SDHC_ACMD12ERRSTS:
MASKED_WRITE(s->acmd12errsts, mask, value);
MASKED_WRITE(s->acmd12errsts, mask, value & UINT16_MAX);
if (s->uhs_mode >= UHS_I) {
MASKED_WRITE(s->hostctl2, mask >> 16, value >> 16);
if (FIELD_EX32(s->hostctl2, SDHC_HOSTCTL2, V18_ENA)) {
sdbus_set_voltage(&s->sdbus, SD_VOLTAGE_1_8V);
} else {
sdbus_set_voltage(&s->sdbus, SD_VOLTAGE_3_3V);
}
}
break;
case SDHC_CAPAB:
@ -1310,6 +1319,7 @@ static void sdhci_init_readonly_registers(SDHCIState *s, Error **errp)
#define DEFINE_SDHCI_COMMON_PROPERTIES(_state) \
DEFINE_PROP_UINT8("sd-spec-version", _state, sd_spec_version, 2), \
DEFINE_PROP_UINT8("uhs", _state, uhs_mode, UHS_NOT_SUPPORTED), \
\
/* Capabilities registers provide information on supported
* features of this specific host controller implementation */ \

1
hw/sd/trace-events
View file

@ -4,6 +4,7 @@
sdbus_command(const char *bus_name, uint8_t cmd, uint32_t arg, uint8_t crc) "@%s CMD%02d arg 0x%08x crc 0x%02x"
sdbus_read(const char *bus_name, uint8_t value) "@%s value 0x%02x"
sdbus_write(const char *bus_name, uint8_t value) "@%s value 0x%02x"
sdbus_set_voltage(const char *bus_name, uint16_t millivolts) "@%s %u (mV)"
# hw/sd/sdhci.c
sdhci_set_inserted(const char *level) "card state changed: %s"