[PATCH v3 6/8] scsi: ufs: make the UFS variant a platform device
From: Yaniv Gardi
Date: Sun Aug 23 2015 - 09:11:48 EST
This change turns the UFS variant (SCSI_UFS_QCOM) into a UFS
a platform device.
In order to do so a few additional changes are required:
1. The ufshcd-pltfrm is no longer serves as a platform device.
Now it only serves as a group of platform APIs such as PM APIs
(runtime suspend/resume, system suspend/resume etc), parsers of
clocks, regulators and pm_levels from DT.
2. What used to be the old platform "probe" is now "only"
a pltfrm_init() routine, that does exactly the same, but only
being called by the new probe function of the UFS variant.
Signed-off-by: Yaniv Gardi <ygardi@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/ufs/ufshcd-pltfrm.txt | 2 +-
drivers/scsi/ufs/ufs-qcom.c | 78 +++++++++++++++++-
drivers/scsi/ufs/ufshcd-pltfrm.c | 92 ++++++----------------
drivers/scsi/ufs/ufshcd-pltfrm.h | 41 ++++++++++
drivers/scsi/ufs/ufshcd.c | 10 +++
drivers/scsi/ufs/ufshcd.h | 1 +
6 files changed, 152 insertions(+), 72 deletions(-)
create mode 100644 drivers/scsi/ufs/ufshcd-pltfrm.h
diff --git a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
index 5357919..b39e765 100644
--- a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
+++ b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
@@ -4,7 +4,7 @@ UFSHC nodes are defined to describe on-chip UFS host controllers.
Each UFS controller instance should have its own node.
Required properties:
-- compatible : compatible list, contains "jedec,ufs-1.1"
+- compatible : compatible list, contains "jedec,ufs-1.1" or "qcom,ufshc"
- interrupts : <interrupt mapping for UFS host controller IRQ>
- reg : <registers mapping>
diff --git a/drivers/scsi/ufs/ufs-qcom.c b/drivers/scsi/ufs/ufs-qcom.c
index 329ac84..8027435 100644
--- a/drivers/scsi/ufs/ufs-qcom.c
+++ b/drivers/scsi/ufs/ufs-qcom.c
@@ -19,6 +19,7 @@
#include <linux/phy/phy-qcom-ufs.h>
#include "ufshcd.h"
+#include "ufshcd-pltfrm.h"
#include "unipro.h"
#include "ufs-qcom.h"
#include "ufshci.h"
@@ -1036,7 +1037,7 @@ void ufs_qcom_clk_scale_notify(struct ufs_hba *hba)
* The variant operations configure the necessary controller and PHY
* handshake during initialization.
*/
-static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
+static struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
.name = "qcom",
.init = ufs_qcom_init,
.exit = ufs_qcom_exit,
@@ -1050,4 +1051,79 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = {
.resume = ufs_qcom_resume,
};
+/**
+ * ufs_qcom_probe - probe routine of the driver
+ * @pdev: pointer to Platform device handle
+ *
+ * Always return 0
+ */
+static int ufs_qcom_probe(struct platform_device *pdev)
+{
+ int err;
+ struct device *dev = &pdev->dev;
+ struct ufs_hba *hba;
+
+ /* Perform generic probe */
+ err = ufshcd_pltfrm_init(pdev, &ufs_hba_qcom_vops);
+ if (err) {
+ dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err);
+ goto out;
+ }
+
+ hba = platform_get_drvdata(pdev);
+ if (unlikely(!hba)) {
+ dev_err(dev, "no hba structure after successful probing\n");
+ goto dealloc_host;
+ }
+
+ return 0;
+
+dealloc_host:
+ /* disconnect the bind between the qcom host and the hba */
+ ufshcd_set_variant(hba, NULL);
+ ufshcd_dealloc_host(hba);
+out:
+ return err;
+}
+
+/**
+ * ufs_qcom_remove - set driver_data of the device to NULL
+ * @pdev: pointer to platform device handle
+ *
+ * Always return 0
+ */
+static int ufs_qcom_remove(struct platform_device *pdev)
+{
+ struct ufs_hba *hba = platform_get_drvdata(pdev);
+
+ pm_runtime_get_sync(&(pdev)->dev);
+ ufshcd_remove(hba);
+ return 0;
+}
+
+static const struct of_device_id ufs_qcom_of_match[] = {
+ { .compatible = "qcom,ufshc"},
+ {},
+};
+
+static const struct dev_pm_ops ufs_qcom_pm_ops = {
+ .suspend = ufshcd_pltfrm_suspend,
+ .resume = ufshcd_pltfrm_resume,
+ .runtime_suspend = ufshcd_pltfrm_runtime_suspend,
+ .runtime_resume = ufshcd_pltfrm_runtime_resume,
+ .runtime_idle = ufshcd_pltfrm_runtime_idle,
+};
+
+static struct platform_driver ufs_qcom_pltform = {
+ .probe = ufs_qcom_probe,
+ .remove = ufs_qcom_remove,
+ .shutdown = ufshcd_pltfrm_shutdown,
+ .driver = {
+ .name = "ufshcd-qcom",
+ .pm = &ufs_qcom_pm_ops,
+ .of_match_table = of_match_ptr(ufs_qcom_of_match),
+ },
+};
+module_platform_driver(ufs_qcom_pltform);
+
MODULE_LICENSE("GPL v2");
diff --git a/drivers/scsi/ufs/ufshcd-pltfrm.c b/drivers/scsi/ufs/ufshcd-pltfrm.c
index 7db9564..8eafcfa 100644
--- a/drivers/scsi/ufs/ufshcd-pltfrm.c
+++ b/drivers/scsi/ufs/ufshcd-pltfrm.c
@@ -38,20 +38,7 @@
#include <linux/of.h>
#include "ufshcd.h"
-
-static const struct of_device_id ufs_of_match[];
-static struct ufs_hba_variant_ops *get_variant_ops(struct device *dev)
-{
- if (dev->of_node) {
- const struct of_device_id *match;
-
- match = of_match_node(ufs_of_match, dev->of_node);
- if (match)
- return (struct ufs_hba_variant_ops *)match->data;
- }
-
- return NULL;
-}
+#include "ufshcd-pltfrm.h"
static int ufshcd_parse_clock_info(struct ufs_hba *hba)
{
@@ -245,10 +232,11 @@ out:
* Returns 0 if successful
* Returns non-zero otherwise
*/
-static int ufshcd_pltfrm_suspend(struct device *dev)
+int ufshcd_pltfrm_suspend(struct device *dev)
{
return ufshcd_system_suspend(dev_get_drvdata(dev));
}
+EXPORT_SYMBOL_GPL(ufshcd_pltfrm_suspend);
/**
* ufshcd_pltfrm_resume - resume power management function
@@ -257,43 +245,47 @@ static int ufshcd_pltfrm_suspend(struct device *dev)
* Returns 0 if successful
* Returns non-zero otherwise
*/
-static int ufshcd_pltfrm_resume(struct device *dev)
+int ufshcd_pltfrm_resume(struct device *dev)
{
return ufshcd_system_resume(dev_get_drvdata(dev));
}
+EXPORT_SYMBOL_GPL(ufshcd_pltfrm_resume);
-static int ufshcd_pltfrm_runtime_suspend(struct device *dev)
+int ufshcd_pltfrm_runtime_suspend(struct device *dev)
{
return ufshcd_runtime_suspend(dev_get_drvdata(dev));
}
-static int ufshcd_pltfrm_runtime_resume(struct device *dev)
+EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_suspend);
+
+int ufshcd_pltfrm_runtime_resume(struct device *dev)
{
return ufshcd_runtime_resume(dev_get_drvdata(dev));
}
-static int ufshcd_pltfrm_runtime_idle(struct device *dev)
+EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_resume);
+
+int ufshcd_pltfrm_runtime_idle(struct device *dev)
{
return ufshcd_runtime_idle(dev_get_drvdata(dev));
}
-#else /* !CONFIG_PM */
-#define ufshcd_pltfrm_suspend NULL
-#define ufshcd_pltfrm_resume NULL
-#define ufshcd_pltfrm_runtime_suspend NULL
-#define ufshcd_pltfrm_runtime_resume NULL
-#define ufshcd_pltfrm_runtime_idle NULL
+EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_idle);
+
#endif /* CONFIG_PM */
-static void ufshcd_pltfrm_shutdown(struct platform_device *pdev)
+void ufshcd_pltfrm_shutdown(struct platform_device *pdev)
{
ufshcd_shutdown((struct ufs_hba *)platform_get_drvdata(pdev));
}
+EXPORT_SYMBOL_GPL(ufshcd_pltfrm_shutdown);
/**
- * ufshcd_pltfrm_probe - probe routine of the driver
+ * ufshcd_pltfrm_init - probe routine of the driver
* @pdev: pointer to Platform device handle
+ * @vops: pointer to variant ops
*
* Returns 0 on success, non-zero value on failure
*/
-static int ufshcd_pltfrm_probe(struct platform_device *pdev)
+int ufshcd_pltfrm_init(struct platform_device *pdev,
+ struct ufs_hba_variant_ops *vops)
{
struct ufs_hba *hba;
void __iomem *mmio_base;
@@ -321,7 +313,7 @@ static int ufshcd_pltfrm_probe(struct platform_device *pdev)
goto out;
}
- hba->vops = get_variant_ops(&pdev->dev);
+ hba->vops = vops;
err = ufshcd_parse_clock_info(hba);
if (err) {
@@ -355,47 +347,7 @@ out_disable_rpm:
out:
return err;
}
-
-/**
- * ufshcd_pltfrm_remove - remove platform driver routine
- * @pdev: pointer to platform device handle
- *
- * Returns 0 on success, non-zero value on failure
- */
-static int ufshcd_pltfrm_remove(struct platform_device *pdev)
-{
- struct ufs_hba *hba = platform_get_drvdata(pdev);
-
- pm_runtime_get_sync(&(pdev)->dev);
- ufshcd_remove(hba);
- return 0;
-}
-
-static const struct of_device_id ufs_of_match[] = {
- { .compatible = "jedec,ufs-1.1"},
- {},
-};
-
-static const struct dev_pm_ops ufshcd_dev_pm_ops = {
- .suspend = ufshcd_pltfrm_suspend,
- .resume = ufshcd_pltfrm_resume,
- .runtime_suspend = ufshcd_pltfrm_runtime_suspend,
- .runtime_resume = ufshcd_pltfrm_runtime_resume,
- .runtime_idle = ufshcd_pltfrm_runtime_idle,
-};
-
-static struct platform_driver ufshcd_pltfrm_driver = {
- .probe = ufshcd_pltfrm_probe,
- .remove = ufshcd_pltfrm_remove,
- .shutdown = ufshcd_pltfrm_shutdown,
- .driver = {
- .name = "ufshcd",
- .pm = &ufshcd_dev_pm_ops,
- .of_match_table = ufs_of_match,
- },
-};
-
-module_platform_driver(ufshcd_pltfrm_driver);
+EXPORT_SYMBOL_GPL(ufshcd_pltfrm_init);
MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@xxxxxxxxxxx>");
MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@xxxxxxxxxxx>");
diff --git a/drivers/scsi/ufs/ufshcd-pltfrm.h b/drivers/scsi/ufs/ufshcd-pltfrm.h
new file mode 100644
index 0000000..df64c41
--- /dev/null
+++ b/drivers/scsi/ufs/ufshcd-pltfrm.h
@@ -0,0 +1,41 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef UFSHCD_PLTFRM_H_
+#define UFSHCD_PLTFRM_H_
+
+#include "ufshcd.h"
+
+int ufshcd_pltfrm_init(struct platform_device *pdev,
+ struct ufs_hba_variant_ops *vops);
+void ufshcd_pltfrm_shutdown(struct platform_device *pdev);
+
+#ifdef CONFIG_PM
+
+int ufshcd_pltfrm_suspend(struct device *dev);
+int ufshcd_pltfrm_resume(struct device *dev);
+int ufshcd_pltfrm_runtime_suspend(struct device *dev);
+int ufshcd_pltfrm_runtime_resume(struct device *dev);
+int ufshcd_pltfrm_runtime_idle(struct device *dev);
+
+#else /* !CONFIG_PM */
+
+#define ufshcd_pltfrm_suspend NULL
+#define ufshcd_pltfrm_resume NULL
+#define ufshcd_pltfrm_runtime_suspend NULL
+#define ufshcd_pltfrm_runtime_resume NULL
+#define ufshcd_pltfrm_runtime_idle NULL
+
+#endif /* CONFIG_PM */
+
+#endif /* UFSHCD_PLTFRM_H_ */
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 9e79c33..2ef9834 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5348,6 +5348,16 @@ void ufshcd_remove(struct ufs_hba *hba)
EXPORT_SYMBOL_GPL(ufshcd_remove);
/**
+ * ufshcd_dealloc_host - deallocate Host Bus Adapter (HBA)
+ * @hba: pointer to Host Bus Adapter (HBA)
+ */
+void ufshcd_dealloc_host(struct ufs_hba *hba)
+{
+ scsi_host_put(hba->host);
+}
+EXPORT_SYMBOL_GPL(ufshcd_dealloc_host);
+
+/**
* ufshcd_set_dma_mask - Set dma mask based on the controller
* addressing capability
* @hba: per adapter instance
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index ce75626..f2aa47e 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -576,6 +576,7 @@ static inline void ufshcd_rmwl(struct ufs_hba *hba, u32 mask, u32 val, u32 reg)
}
int ufshcd_alloc_host(struct device *, struct ufs_hba **);
+void ufshcd_dealloc_host(struct ufs_hba *);
int ufshcd_init(struct ufs_hba * , void __iomem * , unsigned int);
void ufshcd_remove(struct ufs_hba *);
--
1.8.5.2
--
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