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authorSeungwon Jeon <tgih.jun@samsung.com>2013-08-31 21:40:24 +0530
committerJames Bottomley <JBottomley@Parallels.com>2013-09-06 16:08:37 -0700
commitd3e89bac7155341d3cfe58e76842a2a9729e6e41 (patch)
treed9b33ca91f15e2afd21c7017f856091536599d44 /drivers/scsi
parent53b3d9c3fdda94d14392dd221c67e24700b1fed6 (diff)
[SCSI] ufs: configure the attribute for power mode
UIC attributes can be set with using DME_SET command for power mode change. For configuration the link capability attributes are used, which is updated after successful link startup. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/ufs/ufshcd.c66
-rw-r--r--drivers/scsi/ufs/unipro.h21
2 files changed, 87 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 1788d9cc571b..04884d663e4e 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1532,6 +1532,70 @@ out:
}
/**
+ * ufshcd_config_max_pwr_mode - Set & Change power mode with
+ * maximum capability attribute information.
+ * @hba: per adapter instance
+ *
+ * Returns 0 on success, non-zero value on failure
+ */
+static int ufshcd_config_max_pwr_mode(struct ufs_hba *hba)
+{
+ enum {RX = 0, TX = 1};
+ u32 lanes[] = {1, 1};
+ u32 gear[] = {1, 1};
+ u8 pwr[] = {FASTAUTO_MODE, FASTAUTO_MODE};
+ int ret;
+
+ /* Get the connected lane count */
+ ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDRXDATALANES), &lanes[RX]);
+ ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDTXDATALANES), &lanes[TX]);
+
+ /*
+ * First, get the maximum gears of HS speed.
+ * If a zero value, it means there is no HSGEAR capability.
+ * Then, get the maximum gears of PWM speed.
+ */
+ ufshcd_dme_get(hba, UIC_ARG_MIB(PA_MAXRXHSGEAR), &gear[RX]);
+ if (!gear[RX]) {
+ ufshcd_dme_get(hba, UIC_ARG_MIB(PA_MAXRXPWMGEAR), &gear[RX]);
+ pwr[RX] = SLOWAUTO_MODE;
+ }
+
+ ufshcd_dme_peer_get(hba, UIC_ARG_MIB(PA_MAXRXHSGEAR), &gear[TX]);
+ if (!gear[TX]) {
+ ufshcd_dme_peer_get(hba, UIC_ARG_MIB(PA_MAXRXPWMGEAR),
+ &gear[TX]);
+ pwr[TX] = SLOWAUTO_MODE;
+ }
+
+ /*
+ * Configure attributes for power mode change with below.
+ * - PA_RXGEAR, PA_ACTIVERXDATALANES, PA_RXTERMINATION,
+ * - PA_TXGEAR, PA_ACTIVETXDATALANES, PA_TXTERMINATION,
+ * - PA_HSSERIES
+ */
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXGEAR), gear[RX]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_ACTIVERXDATALANES), lanes[RX]);
+ if (pwr[RX] == FASTAUTO_MODE)
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_RXTERMINATION), TRUE);
+
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXGEAR), gear[TX]);
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_ACTIVETXDATALANES), lanes[TX]);
+ if (pwr[TX] == FASTAUTO_MODE)
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_TXTERMINATION), TRUE);
+
+ if (pwr[RX] == FASTAUTO_MODE || pwr[TX] == FASTAUTO_MODE)
+ ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HSSERIES), PA_HS_MODE_B);
+
+ ret = ufshcd_uic_change_pwr_mode(hba, pwr[RX] << 4 | pwr[TX]);
+ if (ret)
+ dev_err(hba->dev,
+ "pwr_mode: power mode change failed %d\n", ret);
+
+ return ret;
+}
+
+/**
* ufshcd_complete_dev_init() - checks device readiness
* hba: per-adapter instance
*
@@ -2662,6 +2726,8 @@ static void ufshcd_async_scan(void *data, async_cookie_t cookie)
if (ret)
goto out;
+ ufshcd_config_max_pwr_mode(hba);
+
ret = ufshcd_verify_dev_init(hba);
if (ret)
goto out;
diff --git a/drivers/scsi/ufs/unipro.h b/drivers/scsi/ufs/unipro.h
index 3a710eb3ec20..0bb8041c047a 100644
--- a/drivers/scsi/ufs/unipro.h
+++ b/drivers/scsi/ufs/unipro.h
@@ -72,6 +72,21 @@
#define PA_STALLNOCONFIGTIME 0x15A3
#define PA_SAVECONFIGTIME 0x15A4
+/* PA power modes */
+enum {
+ FAST_MODE = 1,
+ SLOW_MODE = 2,
+ FASTAUTO_MODE = 4,
+ SLOWAUTO_MODE = 5,
+ UNCHANGED = 7,
+};
+
+/* PA TX/RX Frequency Series */
+enum {
+ PA_HS_MODE_A = 1,
+ PA_HS_MODE_B = 2,
+};
+
/*
* Data Link Layer Attributes
*/
@@ -127,4 +142,10 @@
#define T_TC0TXMAXSDUSIZE 0x4060
#define T_TC1TXMAXSDUSIZE 0x4061
+/* Boolean attribute values */
+enum {
+ FALSE = 0,
+ TRUE,
+};
+
#endif /* _UNIPRO_H_ */