# SD Card initialization failed - Host Driver does not check the Voltage Support bits

**URL:** <https://mangoh.discourse.group/t/sd-card-initialization-failed-host-driver-does-not-check-the-voltage-support-bits/187>\
**Category:** mangOH Green\
**Created:** [August 4, 2016, 2:09pm UTC](https://mangoh.discourse.group/t/sd-card-initialization-failed-host-driver-does-not-check-the-voltage-support-bits/187 "2016-08-04T14:09:48Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![spastor](https://avatars.discourse-cdn.com/v4/letter/s/35a633/32.png) [@spastor](https://mangoh.discourse.group/u/spastor)\
**Post date:** [August 4, 2016, 2:09pm UTC](https://mangoh.discourse.group/t/sd-card-initialization-failed-host-driver-does-not-check-the-voltage-support-bits/187/1 "2016-08-04T14:09:48Z")

</div>

Hello Forum,

I am various problems when trying to mount an SD card with my mangOH board.  
What is the most complicated to understand is that I do not have the same behavior with different SD cards.

Here is the test with **3 different cards** ( **_Reproducible 100_%** )  
**=\>** the Host Driver does not check the Voltage Support bits in the Capabilities register.

**Card A** , Kernel Log:  
[1390.960048] mmc0: bam physical base=0x12182000  
[1390.963466] mmc0: bam virtual base=0xd055c000  
[1390.967831] sps:BAM 0x12182000 is registered.  
[1390.999389] mmc0: BAM device registered. bam\_handle=0xcbe39c00[1391.004608] sps:REVISION of BAM 0xd055c000 is 0x5.  
[1391.029848] mmc0: Qualcomm MSM SDCC-BAM at 0x0000000012182000 irq 130  
[1391.035281] mmc0: Qualcomm MSM SDCC-DML at 0x0000000012180800  
[1391.050999] mmc0: No card detect facilities available  
[1391.065588] mmc0: Qualcomm MSM SDCC-core at 0x0000000012180000 irq 136,0 dma -1 dmacrcri -1  
[1391.087288] mmc0: 8 bit data mode disabled  
[1391.098458] mmc0: 4 bit data mode enabled  
[1391.107034] mmc0: polling status mode disabled  
[1391.130077] mmc0: MMC clock 400000 -\> 48000000 Hz, PCLK 0 Hz  
[1391.156111] mmc0: Slot eject status = 0  
[1391.166518] mmc0: Power save feature enable = 1  
[1391.171158] mmc0: SPS-BAM data transfer mode available  
root@swi-mdm9x15:~# [1391.373843] mmc0: **msmsdcc\_switch\_io\_voltage: MCIDATIN\_3\_0 are still not all ones**  
[1391.607446] mmc0: mmc\_sd\_init\_card() failure (err = -95)  
[1391.612513] mmc0: error -95 whilst initialising SD card  
[1391.620021] mmc0: **host doesn’t support card’s voltages**  
[1391.624141] mmc0: error -22 whilst initialising MMC card

**Card B** , Kernel Log:  
[1590.823347] mmc0: mci-version: 18  
[1590.829970] mmc0: bam physical base=0x12182000  
[1590.833389] mmc0: bam virtual base=0xd05d0000  
[1590.837722] sps:BAM 0x12182000 is registered.  
[1590.859392] mmc0: BAM device registered. bam\_handle=0xcbe0c200[1590.864580] sps:REVISION of BAM 0xd05d0000 is 0x5.  
[1590.873309] mmc0: Qualcomm MSM SDCC-BAM at 0x0000000012182000 irq 130  
[1590.878772] mmc0: Qualcomm MSM SDCC-DML at 0x0000000012180800  
[1590.885304] mmc0: No card detect facilities available  
[1590.893483] mmc0: Qualcomm MSM SDCC-core at 0x0000000012180000 irq 136,0 dma -1 dmacrcri -1  
[1590.909567] mmc0: 8 bit data mode disabled  
[1590.912650] mmc0: 4 bit data mode enabled  
[1590.928460] mmc0: polling status mode disabled  
[1590.937524] mmc0: MMC clock 400000 -\> 48000000 Hz, PCLK 0 Hz  
[1590.959590] mmc0: Slot eject status = 0  
[1590.967465] mmc0: Power save feature enable = 1  
[1590.976712] mmc0: SPS-BAM data transfer mode available  
root@swi-mdm9x15:~# [1591.200274] mmc0: **msmsdcc\_switch\_io\_voltage: MCIDATIN\_3\_0 are still not all ones**  
[1591.556172] mmc0: mmc\_sd\_init\_card() failure (err = -110)  
[1591.561330] mmc0: error -110 whilst initialising SD card

**Card C** , Kernel Log:  
[31.272852] mmc0: mci-version: 18  
[31.280299] mmc0: bam physical base=0x12182000  
[31.283717] mmc0: bam virtual base=0xd055c000  
[31.288081] sps:BAM 0x12182000 is registered.  
[31.309751] mmc0: BAM device registered. bam\_handle=0xcdcc7800[31.314939] sps:REVISION of BAM 0xd055c000 is 0x5.  
[31.319914] mmc0: Qualcomm MSM SDCC-BAM at 0x0000000012182000 irq 130  
[31.329528] mmc0: Qualcomm MSM SDCC-DML at 0x0000000012180800  
[31.334991] mmc0: No card detect facilities available  
[31.343995] mmc0: Qualcomm MSM SDCC-core at 0x0000000012180000 irq 136,0 dma -1 dmacrcri -1  
[31.359865] mmc0: 8 bit data mode disabled  
[31.362948] mmc0: 4 bit data mode enabled  
[31.378727] mmc0: polling status mode disabled  
[31.387791] mmc0: MMC clock 400000 -\> 48000000 Hz, PCLK 0 Hz  
[31.410102] mmc0: Slot eject status = 0  
[31.417976] mmc0: Power save feature enable = 1  
[31.427132] mmc0: SPS-BAM data transfer mode available  
**_===\> OK, no error card detected_**  
root@swi-mdm9x15:~# [31.567801] mmc0: host does not support reading read-only switch. assuming write-enable.  
[31.585808] mmc0: new high speed SDHC card at address 59b4  
[31.599816] **mmcblk0: mmc0:59b4 00000 7.47 GiB**  
[31.665466] mmcblk0: p1

Help would be welcome,  
Best regards,  
Sylvain