2015-05-18 0:55 GMT+09:00 Yaniv Gardi <ygardi@xxxxxxxxxxxxxx>:
> Newer revisions of QUALCOMM Technologies UFS host controller may not
> advertise the correct version information in UFS HCI VER register.
> To handle this, enable UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION to let
> UFS standard host controller driver call into vendor specific
> operation to get right UFS HCI VER register value.
>
> Signed-off-by: Yaniv Gardi <ygardi@xxxxxxxxxxxxxx>
>
> ---
> drivers/scsi/ufs/ufs-qcom.c | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
> index de9cfb0..4cdffa4 100644
> --- a/drivers/scsi/ufs/ufs-qcom.c
> +++ b/drivers/scsi/ufs/ufs-qcom.c
> @@ -694,6 +694,16 @@ out:
> return ret;
> }
>
> +static u32 ufs_qcom_get_ufs_hci_version(struct ufs_hba *hba)
> +{
> + struct ufs_qcom_host *host = hba->priv;
> +
> + if (host->hw_ver.major == 0x1)
> + return UFSHCI_VERSION_11;
> + else
> + return UFSHCI_VERSION_20;
Btw, UFS driver currently lacks UFSHCI 2.0 support. Shouldn't we also
need a change like the patch submitted by Chuanxiao Dong:
http://marc.info/?l=linux-scsi&m=140688020815020&w=2
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