eMMC CSD register is very similar to SD one. Most notable change: the version announced is v4.3.
Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org> --- TODO: comment magic values? --- hw/sd/sd.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/hw/sd/sd.c b/hw/sd/sd.c index 2d737a836f..f580c6b2ae 100644 --- a/hw/sd/sd.c +++ b/hw/sd/sd.c @@ -476,6 +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; @@ -2600,6 +2638,7 @@ static void emmc_class_init(ObjectClass *klass, void *data) sc->proto = &sd_proto_emmc; sc->set_cid = emmc_set_cid; + sc->set_csd = emmc_set_csd; } static const TypeInfo sd_types[] = { -- 2.41.0