From: Philippe Mathieu-Daudé <f4...@amsat.org>
Since eMMC are soldered on boards, it is not user-creatable.
RCA register is initialized to 0x0001, per spec v4.3,
chapter 8.5 "RCA register":
The default value of the RCA register is 0x0001.
The value 0x0000 is reserved to set all cards into
the Stand-by State with CMD7.
The CSD register is very similar to SD one, except
the version announced is v4.3.
eMMC CID register is slightly different from SD:
- One extra PNM (5 -> 6)
- MDT is only 1 byte (2 -> 1).
Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
Signed-off-by: Cédric Le Goater <c...@kaod.org>
Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
---
TODO: comment magic CSD values?
---
include/hw/sd/sd.h | 3 ++
hw/sd/sd.c | 107 ++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 109 insertions(+), 1 deletion(-)
diff --git a/include/hw/sd/sd.h b/include/hw/sd/sd.h
index 0d6d9e452b..d35a839f5e 100644
--- a/include/hw/sd/sd.h
+++ b/include/hw/sd/sd.h
@@ -96,6 +96,9 @@ OBJECT_DECLARE_TYPE(SDState, SDCardClass, SD_CARD)
#define TYPE_SD_CARD_SPI "sd-card-spi"
DECLARE_INSTANCE_CHECKER(SDState, SD_CARD_SPI, TYPE_SD_CARD_SPI)
+#define TYPE_EMMC "emmc"
+DECLARE_INSTANCE_CHECKER(SDState, EMMC, TYPE_EMMC)
+
struct SDCardClass {
/*< private >*/
DeviceClass parent_class;
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index d6a07f0ade..a4b6c7baba 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -2,6 +2,8 @@
* SD Memory Card emulation as defined in the "SD Memory Card Physical
* layer specification, Version 2.00."
*
+ * eMMC emulation defined in "JEDEC Standard No. 84-A43"
+ *
* Copyright (c) 2006 Andrzej Zaborowski <bal...@zabor.org>
* Copyright (c) 2007 CodeSourcery
* Copyright (c) 2018 Philippe Mathieu-Daudé <f4...@amsat.org>
@@ -169,12 +171,18 @@ struct SDState {
static void sd_realize(DeviceState *dev, Error **errp);
static const SDProto sd_proto_spi;
+static const SDProto sd_proto_emmc;
static bool sd_is_spi(SDState *sd)
{
return sd->proto == &sd_proto_spi;
}
+static bool sd_is_emmc(SDState *sd)
+{
+ return sd->proto == &sd_proto_emmc;
+}
+
static const char *sd_version_str(enum SDPhySpecificationVersion version)
{
static const char *sdphy_version[] = {
@@ -438,6 +446,23 @@ static void sd_set_cid(SDState *sd)
sd->cid[15] = (sd_crc7(sd->cid, 15) << 1) | 1;
}
+static void emmc_set_cid(SDState *sd)
+{
+ sd->cid[0] = MID; /* Fake card manufacturer ID (MID) */
+ sd->cid[1] = 0b01; /* CBX: soldered BGA */
+ sd->cid[2] = OID[0]; /* OEM/Application ID (OID) */
+ sd->cid[3] = PNM[0]; /* Fake product name (PNM) */
+ sd->cid[4] = PNM[1];
+ sd->cid[5] = PNM[2];
+ sd->cid[6] = PNM[3];
+ sd->cid[7] = PNM[4];
+ sd->cid[8] = PNM[4];
+ sd->cid[9] = PRV; /* Fake product revision (PRV) */
+ stl_be_p(&sd->cid[10], 0xdeadbeef); /* Fake serial number (PSN) */
+ sd->cid[14] = (MDT_MON << 4) | (MDT_YR - 1997); /* Manufacture date (MDT)
*/
+ sd->cid[15] = (sd_crc7(sd->cid, 15) << 1) | 1;
+}
+
/* Card-Specific Data register */
#define HWBLOCK_SHIFT 9 /* 512 bytes */
@@ -451,6 +476,44 @@ static const uint8_t sd_csd_rw_mask[16] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, 0xfe,
};
+static void emmc_set_csd(SDState *sd, uint64_t size)
+{
+ int hwblock_shift = HWBLOCK_SHIFT;
+ uint32_t sectsize = (1 << (SECTOR_SHIFT + 1)) - 1;
+ uint32_t wpsize = (1 << (WPGROUP_SHIFT + 1)) - 1;
+
+ sd->csd[0] = (2 << 6) | (4 << 2);
+ sd->csd[1] = 0x07;
+ sd->csd[2] = 0x00;
+ sd->csd[3] = 0x32;
+ sd->csd[4] = 0x0f;
+ if (size <= 2 * GiB) {
+ /* use 1k blocks */
+ uint32_t csize1k = (size >> (CMULT_SHIFT + 10)) - 1;
+ sd->csd[5] = 0x5a;
+ sd->csd[6] = 0x80 | ((csize1k >> 10) & 0xf);
+ sd->csd[7] = (csize1k >> 2) & 0xff;
+ } else { /* >= 2GB : size stored in ext CSD, block addressing */
+ sd->csd[5] = 0x59;
+ sd->csd[6] = 0x8f;
+ sd->csd[7] = 0xff;
+ sd->ocr = FIELD_DP32(sd->ocr, OCR, CARD_CAPACITY, 1);
+ }
+ sd->csd[8] = 0xff;
+ sd->csd[9] = 0xfc | /* Max. write current */
+ ((CMULT_SHIFT - 2) >> 1);
+ sd->csd[10] = 0x40 | /* Erase sector size */
+ (((CMULT_SHIFT - 2) << 7) & 0x80) | (sectsize >> 1);
+ sd->csd[11] = 0x00 | /* Write protect group size */
+ ((sectsize << 7) & 0x80) | wpsize;
+ sd->csd[12] = 0x90 | /* Write speed factor */
+ (hwblock_shift >> 2);
+ sd->csd[13] = 0x20 | /* Max. write data block length */
+ ((hwblock_shift << 6) & 0xc0);
+ sd->csd[14] = 0x00;
+ sd->csd[15] = (sd_crc7(sd->csd, 15) << 1) | 1;
+}
+
static void sd_set_csd(SDState *sd, uint64_t size)
{
int hwblock_shift = HWBLOCK_SHIFT;
@@ -697,7 +760,7 @@ static void sd_reset(DeviceState *dev)
sd->state = sd_idle_state;
/* card registers */
- sd->rca = 0x0000;
+ sd->rca = sd_is_emmc(sd) ? 0x0001 : 0x0000;
sd->size = size;
sd_set_ocr(sd);
sd_set_scr(sd);
@@ -2375,6 +2438,13 @@ static const SDProto sd_proto_sd = {
},
};
+static const SDProto sd_proto_emmc = {
+ /* Only v4.3 is supported */
+ .name = "eMMC",
+ .cmd = {
+ },
+};
+
static void sd_instance_init(Object *obj)
{
SDState *sd = SDMMC_COMMON(obj);
@@ -2446,6 +2516,15 @@ static void sd_realize(DeviceState *dev, Error **errp)
}
}
+static void emmc_realize(DeviceState *dev, Error **errp)
+{
+ SDState *sd = SDMMC_COMMON(dev);
+
+ sd->spec_version = SD_PHY_SPECv3_01_VERS; /* Actually v4.3 */
+
+ sd_realize(dev, errp);
+}
+
static Property sdmmc_common_properties[] = {
DEFINE_PROP_DRIVE("drive", SDState, blk),
DEFINE_PROP_END_OF_LIST()
@@ -2457,6 +2536,10 @@ static Property sd_properties[] = {
DEFINE_PROP_END_OF_LIST()
};
+static Property emmc_properties[] = {
+ DEFINE_PROP_END_OF_LIST()
+};
+
static void sdmmc_common_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
@@ -2509,6 +2592,23 @@ static void sd_spi_class_init(ObjectClass *klass, void
*data)
sc->proto = &sd_proto_spi;
}
+static void emmc_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SDCardClass *sc = SDMMC_COMMON_CLASS(klass);
+
+ dc->desc = "eMMC";
+ dc->realize = emmc_realize;
+ device_class_set_props(dc, emmc_properties);
+ /* Reason: Soldered on board */
+ dc->user_creatable = false;
+
+ sc->proto = &sd_proto_emmc;
+
+ sc->set_cid = emmc_set_cid;
+ sc->set_csd = emmc_set_csd;
+}
+
static const TypeInfo sd_types[] = {
{
.name = TYPE_SDMMC_COMMON,
@@ -2530,6 +2630,11 @@ static const TypeInfo sd_types[] = {
.parent = TYPE_SD_CARD,
.class_init = sd_spi_class_init,
},
+ {
+ .name = TYPE_EMMC,
+ .parent = TYPE_SDMMC_COMMON,
+ .class_init = emmc_class_init,
+ },
};
DEFINE_TYPES(sd_types)
--
2.41.0
