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| author | Yaniv Gardi <ygardi@codeaurora.org> | 2015-05-17 18:55:03 +0300 |
|---|---|---|
| committer | James Bottomley <JBottomley@Odin.com> | 2015-06-02 13:17:34 -0700 |
| commit | 874237f7f2aae61d166613cc191238d8335087f8 (patch) | |
| tree | 3032d63c16e92edaecabe33ec82898dffcc0a36d /drivers/scsi/ufs | |
| parent | 8163743e23035dd2e2ab531878517137033d62bf (diff) | |
| download | blackbird-obmc-linux-874237f7f2aae61d166613cc191238d8335087f8.tar.gz blackbird-obmc-linux-874237f7f2aae61d166613cc191238d8335087f8.zip | |
scsi: ufs: introduce UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE quirk
Some UFS host controllers may only allow accessing the peer DME attribute
in AUTO mode (FAST AUTO or SLOW AUTO) hence we had added a quirk for
switching to AUTO power mode before accessing the peer DME attribute.
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
Reviewed-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Diffstat (limited to 'drivers/scsi/ufs')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 31 | ||||
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.h | 7 |
2 files changed, 38 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index a274df98ddf0..014f1c0f843a 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -188,6 +188,8 @@ static int ufshcd_host_reset_and_restore(struct ufs_hba *hba); static irqreturn_t ufshcd_intr(int irq, void *__hba); static int ufshcd_config_pwr_mode(struct ufs_hba *hba, struct ufs_pa_layer_attr *desired_pwr_mode); +static int ufshcd_change_power_mode(struct ufs_hba *hba, + struct ufs_pa_layer_attr *pwr_mode); static inline int ufshcd_enable_irq(struct ufs_hba *hba) { @@ -2156,6 +2158,31 @@ int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel, }; const char *get = action[!!peer]; int ret; + struct ufs_pa_layer_attr orig_pwr_info; + struct ufs_pa_layer_attr temp_pwr_info; + bool pwr_mode_change = false; + + if (peer && (hba->quirks & UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE)) { + orig_pwr_info = hba->pwr_info; + temp_pwr_info = orig_pwr_info; + + if (orig_pwr_info.pwr_tx == FAST_MODE || + orig_pwr_info.pwr_rx == FAST_MODE) { + temp_pwr_info.pwr_tx = FASTAUTO_MODE; + temp_pwr_info.pwr_rx = FASTAUTO_MODE; + pwr_mode_change = true; + } else if (orig_pwr_info.pwr_tx == SLOW_MODE || + orig_pwr_info.pwr_rx == SLOW_MODE) { + temp_pwr_info.pwr_tx = SLOWAUTO_MODE; + temp_pwr_info.pwr_rx = SLOWAUTO_MODE; + pwr_mode_change = true; + } + if (pwr_mode_change) { + ret = ufshcd_change_power_mode(hba, &temp_pwr_info); + if (ret) + goto out; + } + } uic_cmd.command = peer ? UIC_CMD_DME_PEER_GET : UIC_CMD_DME_GET; @@ -2170,6 +2197,10 @@ int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr_sel, if (mib_val) *mib_val = uic_cmd.argument3; + + if (peer && (hba->quirks & UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE) + && pwr_mode_change) + ufshcd_change_power_mode(hba, &orig_pwr_info); out: return ret; } diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 8636ec970946..eb6831db1548 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -442,6 +442,13 @@ struct ufs_hba { */ #define UFSHCD_QUIRK_BROKEN_PA_RXHSUNTERMCAP UFS_BIT(3) + /* + * This quirk needs to be enabled if the host contoller only allows + * accessing the peer dme attributes in AUTO mode (FAST AUTO or + * SLOW AUTO). + */ + #define UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE UFS_BIT(4) + unsigned int quirks; /* Deviations from standard UFSHCI spec. */ wait_queue_head_t tm_wq; |
