Hi,
I need some help:
setup:
MicroZed onto custom carrier board
Custom carrier has eMMC device Sandisk SDINBDG4-8G, connected to SDIO1 controller using EMIO.
tools Vivado/Petalinux 2018.2 (started with mz7010_fmccc_2018_2.bsp)
boot from SD-card
goal:
eventually replacing SD boot with boot from QSPI+eMMC(through EMIO)
first test:
boot from SD card, and using u-boot mmc commands to test/verify eMMC infrastructure/accesses
actions done:
Vivado: enabled SDIO1, and routed SD1-EMIO signals to eMMC device onto carrier board
connecting (EMIOSDIO1CLKFB = EMIOSDIO1CLK)
set SDIO clock in PS configurations : 20Mhz (AR# 59999)
booting from SD card
status:
boot from SD is OK
in u-boot : 'mmc list' shows eMMC device (negociation at low speed), as well as SD device
(Error detected in status(0x208000)!, see log below)
mmc info : OK , can read device info from eMMC device
mmc read OK
mmc write NOK
observations:
using Vivado HW manager: used SD Clock is still around 50Mhz
(should go to lower/standard speed mode, e.g. <= 25Mhz, because of EMIO)
question:
How to force standard speed mode, for SDIO1<->EMIO<->eMMC device (Petalinux) ?
Some changes needed in 2018.2 u-boot/linux/DT (e.g. some patches, constants, ) ?
Thanks,
Eddy
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log:
DRAM: ECC disabled 1 GiB
MMC: sdhci_transfer_data: Error detected in status(0x208000)!
sdhci@e0100000: 0 (SD), sdhci@e0101000: 1 (eMMC)
** No device specified **
Zynq> mmc dev 1
sdhci_transfer_data: Error detected in status(0x208000)!
switch to partitions #0, OK
mmc1(part 0) is current device
Zynq>
Zynq> mmc info
Device: sdhci@e0101000
Manufacturer ID: 45
OEM: 100
Name: DG400
Tran Speed: 52000000
Rd Block Len: 512
MMC version 5.1
High Capacity: Yes
Capacity: 7.3 GiB
Bus Width: 4-bit
Erase Group Size: 512 KiB
HC WP Group Size: 8 MiB
User Capacity: 7.3 GiB WRREL
Boot Capacity: 4 MiB ENH
RPMB Capacity: 4 MiB ENH
Zynq>
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