From: Alim Akhtar <alim.akhtar@samsung.com>
To: robh@kernel.org
Cc: devicetree@vger.kernel.org, linux-scsi@vger.kernel.org,
krzk@kernel.org, avri.altman@wdc.com, martin.petersen@oracle.com,
kwmad.kim@samsung.com, stanley.chu@mediatek.com,
cang@codeaurora.org, linux-samsung-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, kishon@ti.com,
Alim Akhtar <alim.akhtar@samsung.com>
Subject: [RESEND PATCH v10 03/10] scsi: ufs: add quirk to enable host controller without hce
Date: Sat, 13 Jun 2020 08:16:59 +0530 [thread overview]
Message-ID: <20200613024706.27975-4-alim.akhtar@samsung.com> (raw)
In-Reply-To: <20200613024706.27975-1-alim.akhtar@samsung.com>
Some host controllers don't support host controller enable via HCE.
Reviewed-by: Can Guo <cang@codeaurora.org>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Seungwon Jeon <essuuj@gmail.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
---
drivers/scsi/ufs/ufshcd.c | 76 +++++++++++++++++++++++++++++++++++++--
drivers/scsi/ufs/ufshcd.h | 6 ++++
2 files changed, 80 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 0e9704da58bd..ee30ed6cc805 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -3534,6 +3534,52 @@ static int ufshcd_dme_link_startup(struct ufs_hba *hba)
"dme-link-startup: error code %d\n", ret);
return ret;
}
+/**
+ * ufshcd_dme_reset - UIC command for DME_RESET
+ * @hba: per adapter instance
+ *
+ * DME_RESET command is issued in order to reset UniPro stack.
+ * This function now deal with cold reset.
+ *
+ * Returns 0 on success, non-zero value on failure
+ */
+static int ufshcd_dme_reset(struct ufs_hba *hba)
+{
+ struct uic_command uic_cmd = {0};
+ int ret;
+
+ uic_cmd.command = UIC_CMD_DME_RESET;
+
+ ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
+ if (ret)
+ dev_err(hba->dev,
+ "dme-reset: error code %d\n", ret);
+
+ return ret;
+}
+
+/**
+ * ufshcd_dme_enable - UIC command for DME_ENABLE
+ * @hba: per adapter instance
+ *
+ * DME_ENABLE command is issued in order to enable UniPro stack.
+ *
+ * Returns 0 on success, non-zero value on failure
+ */
+static int ufshcd_dme_enable(struct ufs_hba *hba)
+{
+ struct uic_command uic_cmd = {0};
+ int ret;
+
+ uic_cmd.command = UIC_CMD_DME_ENABLE;
+
+ ret = ufshcd_send_uic_cmd(hba, &uic_cmd);
+ if (ret)
+ dev_err(hba->dev,
+ "dme-reset: error code %d\n", ret);
+
+ return ret;
+}
static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba)
{
@@ -4251,7 +4297,7 @@ static inline void ufshcd_hba_stop(struct ufs_hba *hba, bool can_sleep)
}
/**
- * ufshcd_hba_enable - initialize the controller
+ * ufshcd_hba_execute_hce - initialize the controller
* @hba: per adapter instance
*
* The controller resets itself and controller firmware initialization
@@ -4260,7 +4306,7 @@ static inline void ufshcd_hba_stop(struct ufs_hba *hba, bool can_sleep)
*
* Returns 0 on success, non-zero value on failure
*/
-int ufshcd_hba_enable(struct ufs_hba *hba)
+static int ufshcd_hba_execute_hce(struct ufs_hba *hba)
{
int retry;
@@ -4308,6 +4354,32 @@ int ufshcd_hba_enable(struct ufs_hba *hba)
return 0;
}
+
+int ufshcd_hba_enable(struct ufs_hba *hba)
+{
+ int ret;
+
+ if (hba->quirks & UFSHCI_QUIRK_BROKEN_HCE) {
+ ufshcd_set_link_off(hba);
+ ufshcd_vops_hce_enable_notify(hba, PRE_CHANGE);
+
+ /* enable UIC related interrupts */
+ ufshcd_enable_intr(hba, UFSHCD_UIC_MASK);
+ ret = ufshcd_dme_reset(hba);
+ if (!ret) {
+ ret = ufshcd_dme_enable(hba);
+ if (!ret)
+ ufshcd_vops_hce_enable_notify(hba, POST_CHANGE);
+ if (ret)
+ dev_err(hba->dev,
+ "Host controller enable failed with non-hce\n");
+ }
+ } else {
+ ret = ufshcd_hba_execute_hce(hba);
+ }
+
+ return ret;
+}
EXPORT_SYMBOL_GPL(ufshcd_hba_enable);
static int ufshcd_disable_tx_lcc(struct ufs_hba *hba, bool peer)
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 53096642f9a8..f8d08cb9caf7 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -529,6 +529,12 @@ enum ufshcd_quirks {
* that the interrupt aggregation timer and counter are reset by s/w.
*/
UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR = 1 << 7,
+
+ /*
+ * This quirks needs to be enabled if host controller cannot be
+ * enabled via HCE register.
+ */
+ UFSHCI_QUIRK_BROKEN_HCE = 1 << 8,
};
enum ufshcd_caps {
--
2.17.1
next prev parent reply other threads:[~2020-06-13 3:05 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20200613030436epcas5p38137bcaddd80ec5eed746a80a1fe31f5@epcas5p3.samsung.com>
2020-06-13 2:46 ` [RESEND PATCH v10 00/10] exynos-ufs: Add support for UFS HCI Alim Akhtar
[not found] ` <CGME20200613030438epcas5p337ed074612a2a1e8b4d6ecb3dda30b5c@epcas5p3.samsung.com>
2020-06-13 2:46 ` [RESEND PATCH v10 01/10] scsi: ufs: add quirk to fix mishandling utrlclr/utmrlclr Alim Akhtar
[not found] ` <CGME20200613030440epcas5p121247d520b30ddca1a31b2d57bfc6b91@epcas5p1.samsung.com>
2020-06-13 2:46 ` [RESEND PATCH v10 02/10] scsi: ufs: add quirk to disallow reset of interrupt aggregation Alim Akhtar
[not found] ` <CGME20200613030443epcas5p3596ed8c2f56f3aa6bee7d72cb104363a@epcas5p3.samsung.com>
2020-06-13 2:46 ` Alim Akhtar [this message]
[not found] ` <CGME20200613030445epcas5p4428da322cd9527d1075ff0f1ccc75d23@epcas5p4.samsung.com>
2020-06-13 2:47 ` [RESEND PATCH v10 04/10] scsi: ufs: introduce UFSHCD_QUIRK_PRDT_BYTE_GRAN quirk Alim Akhtar
2020-08-12 0:29 ` Eric Biggers
2020-08-13 1:21 ` Alim Akhtar
2020-08-13 1:25 ` Eric Biggers
[not found] ` <CGME20200613030447epcas5p4ef2db2121851bdd251d2fd19b3532bb1@epcas5p4.samsung.com>
2020-06-13 2:47 ` [RESEND PATCH v10 05/10] scsi: ufs: add quirk to fix abnormal ocs fatal error Alim Akhtar
[not found] ` <CGME20200613030449epcas5p3cb1139c47ed1c9055c22facf2f5a933b@epcas5p3.samsung.com>
2020-06-13 2:47 ` [RESEND PATCH v10 06/10] dt-bindings: phy: Document Samsung UFS PHY bindings Alim Akhtar
[not found] ` <CGME20200613030451epcas5p101ab5aa635668f68b88f302c25b32a6d@epcas5p1.samsung.com>
2020-06-13 2:47 ` [RESEND PATCH v10 07/10] phy: samsung-ufs: add UFS PHY driver for samsung SoC Alim Akhtar
2020-06-13 4:40 ` kernel test robot
[not found] ` <CGME20200613052521epcas5p140d979df19fae20c858c485409596a7a@epcas5p1.samsung.com>
[not found] ` <202006131334.EEnoEaXS%lkp@intel.com>
2020-06-15 16:24 ` Alim Akhtar
[not found] ` <CGME20200613030454epcas5p400f76485ddb34ce6293f0c8fa94332b8@epcas5p4.samsung.com>
2020-06-13 2:47 ` [RESEND PATCH v10 08/10] dt-bindings: ufs: Add bindings for Samsung ufs host Alim Akhtar
2021-07-13 7:05 ` Alim Akhtar
2021-07-13 12:45 ` Krzysztof Kozlowski
2021-07-13 23:34 ` Chanho Park
2021-07-19 2:07 ` Martin K. Petersen
2021-07-19 3:02 ` Chanho Park
[not found] ` <CGME20200613030456epcas5p2e8c8518fbff9bac830c2a5ffec6109d7@epcas5p2.samsung.com>
2020-06-13 2:47 ` [RESEND PATCH v10 09/10] scsi: ufs-exynos: add UFS host support for Exynos SoCs Alim Akhtar
[not found] ` <CGME20200613030458epcas5p3f9667bab202d99fb332d5bf5aad63c85@epcas5p3.samsung.com>
2020-06-13 2:47 ` [RESEND PATCH v10 10/10] arm64: dts: Add node for ufs exynos7 Alim Akhtar
2020-06-14 11:02 ` Krzysztof Kozlowski
2020-06-15 16:15 ` Alim Akhtar
2020-06-16 3:59 ` [RESEND PATCH v10 00/10] exynos-ufs: Add support for UFS HCI Martin K. Petersen
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