* Sai Pavan Boddu (sai.pavan.bo...@xilinx.com) wrote: > eMMC cards support tuning sequence for entering HS200 mode. > > Signed-off-by: Sai Pavan Boddu <sai.pavan.bo...@xilinx.com> > Signed-off-by: Edgar E. Iglesias <edgar.igles...@xilinx.com> > --- > hw/sd/sd.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 47 insertions(+) > > diff --git a/hw/sd/sd.c b/hw/sd/sd.c > index bf963ec..174c28e 100644 > --- a/hw/sd/sd.c > +++ b/hw/sd/sd.c > @@ -1386,6 +1386,14 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, > SDRequest req) > } > break; > > + case 21: /* CMD21: mmc SEND TUNING_BLOCK */ > + if (sd->emmc && (sd->state == sd_transfer_state)) { > + sd->state = sd_sendingdata_state; > + sd->data_offset = 0; > + return sd_r1; > + } > + break; > + > case 23: /* CMD23: SET_BLOCK_COUNT */ > if (sd->spec_version < SD_PHY_SPECv3_01_VERS) { > break; > @@ -2120,6 +2128,30 @@ static const uint8_t > sd_tuning_block_pattern[SD_TUNING_BLOCK_SIZE] = { > 0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde, > }; > > +#define EXCSD_BUS_WIDTH_OFFSET 183 > +#define BUS_WIDTH_8_MASK 0x4 > +#define BUS_WIDTH_4_MASK 0x2 > +#define MMC_TUNING_BLOCK_SIZE 128 > + > +static const uint8_t mmc_tunning_block_pattern[128] = { > + 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00, > + 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc, > + 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff, > + 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff, > + 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd, > + 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb, > + 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff, > + 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff, > + 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, > + 0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, > + 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, > + 0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, > + 0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, > + 0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, > + 0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, > + 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
Where does this magic pattern come from? Is it part of some spec? Dave > +}; > + > uint8_t sd_read_byte(SDState *sd) > { > /* TODO: Append CRCs */ > @@ -2213,6 +2245,21 @@ uint8_t sd_read_byte(SDState *sd) > ret = sd_tuning_block_pattern[sd->data_offset++]; > break; > > + case 21: /* CMD21: SEND_TUNNING_BLOCK (MMC) */ > + if (sd->data_offset >= MMC_TUNING_BLOCK_SIZE - 1) { > + sd->state = sd_transfer_state; > + } > + if (sd->ext_csd[EXCSD_BUS_WIDTH_OFFSET] & BUS_WIDTH_8_MASK) { > + ret = mmc_tunning_block_pattern[sd->data_offset++]; > + } else { > + /* Return LSB Nibbles of two byte from the 8bit tuning block > + * for 4bit mode > + */ > + ret = mmc_tunning_block_pattern[sd->data_offset++] & 0x0F; > + ret |= (mmc_tunning_block_pattern[sd->data_offset++] & 0x0F) << > 4; > + } > + break; > + > case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */ > ret = sd->data[sd->data_offset ++]; > > -- > 2.7.4 > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK