[PATCH v11 5/6] add TC G210 platform driver

From: Joao Pinto
Date: Mon Mar 07 2016 - 07:10:38 EST

This patch adds a glue platform driver for the Synopsys G210 Test Chip.

Signed-off-by: Joao Pinto <jpinto@xxxxxxxxxxxx>
---
Changes v10->v11 (Arnd Bergmann):
- vops structs are now passed in .data
Changes v0->v10:
- This patch only appeared in v10

.../devicetree/bindings/ufs/tc-dwc-g210-pltfrm.txt | 26 +++++
drivers/scsi/ufs/Kconfig | 9 ++
drivers/scsi/ufs/Makefile | 1 +
drivers/scsi/ufs/tc-dwc-g210-pltfrm.c | 113 +++++++++++++++++++++
4 files changed, 149 insertions(+)
create mode 100644 Documentation/devicetree/bindings/ufs/tc-dwc-g210-pltfrm.txt
create mode 100644 drivers/scsi/ufs/tc-dwc-g210-pltfrm.c

diff --git a/Documentation/devicetree/bindings/ufs/tc-dwc-g210-pltfrm.txt b/Documentation/devicetree/bindings/ufs/tc-dwc-g210-pltfrm.txt
new file mode 100644
index 0000000..6ec9647
--- /dev/null
+++ b/Documentation/devicetree/bindings/ufs/tc-dwc-g210-pltfrm.txt
@@ -0,0 +1,26 @@
+* Universal Flash Storage (UFS) DesignWare Host Controller
+
+DWC_UFS nodes are defined to describe on-chip UFS host controllers and MPHY.
+Each UFS controller instance should have its own node.
+
+Required properties:
+- compatible : compatible list must contain the PHY type & version:
+ "snps, g210-tc-6.00-20bit"
+ "snps, g210-tc-6.00-40bit"
+ complemented with the Controller IP version:
+ "snps, dwc-ufshcd-1.40a"
+ complemented with the JEDEC version:
+ "jedec,ufs-1.1"
+ "jedec,ufs-2.0"
+
+- reg : <registers mapping>
+- interrupts : <interrupt mapping for UFS host controller IRQ>
+
+Example for a setup using a 1.40a DWC Controller with a 6.00 G210 40-bit TC:
+ dwc_ufs@d0000000 {
+ compatible = "snps, g210-tc-6.00-40bit",
+ "snps, dwc-ufshcd-1.40a",
+ "jedec,ufs-2.0";
+ reg = < 0xd0000000 0x10000 >;
+ interrupts = < 24 >;
+ };
diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig
index 9d218f9..5cfa87b 100644
--- a/drivers/scsi/ufs/Kconfig
+++ b/drivers/scsi/ufs/Kconfig
@@ -90,3 +90,12 @@ config SCSI_UFS_DWC
config SCSI_UFS_DWC_TC
bool
select SCSI_UFS_DWC
+
+config SCSI_UFS_DWC_TC_PLATFORM
+ tristate "DesignWare platform support using a G210 Test Chip"
+ depends on SCSI_UFSHCD_PLATFORM
+ select SCSI_UFS_DWC_TC
+ ---help---
+ Synopsys Test Chip is a PHY for prototyping purposes.
+
+ If unsure, say N."
diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile
index 9468d7b..a977fe0 100644
--- a/drivers/scsi/ufs/Makefile
+++ b/drivers/scsi/ufs/Makefile
@@ -1,6 +1,7 @@
# UFSHCD makefile
obj-$(CONFIG_SCSI_UFS_DWC) += ufshcd-dwc.o
obj-$(CONFIG_SCSI_UFS_DWC_TC) += tc-dwc-g210.o
+obj-$(CONFIG_SCSI_UFS_DWC_TC_PLATFORM) += tc-dwc-g210-pltfrm.o
obj-$(CONFIG_SCSI_UFS_QCOM) += ufs-qcom.o
obj-$(CONFIG_SCSI_UFSHCD) += ufshcd.o
obj-$(CONFIG_SCSI_UFSHCD_PCI) += ufshcd-pci.o
diff --git a/drivers/scsi/ufs/tc-dwc-g210-pltfrm.c b/drivers/scsi/ufs/tc-dwc-g210-pltfrm.c
new file mode 100644
index 0000000..9bffb98
--- /dev/null
+++ b/drivers/scsi/ufs/tc-dwc-g210-pltfrm.c
@@ -0,0 +1,113 @@
+/*
+ * Synopsys G210 Test Chip driver
+ *
+ * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
+ *
+ * Authors: Joao Pinto <jpinto@xxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/delay.h>
+
+#include "ufshcd-pltfrm.h"
+#include "ufshcd-dwc.h"
+#include "tc-dwc-g210.h"
+
+/**
+ * UFS DWC specific variant operations
+ */
+static struct ufs_hba_variant_ops tc_dwc_g210_20bit_pltfm_hba_vops = {
+ .name = "tc-dwc-g210-pltfm",
+ .link_startup_notify = ufshcd_dwc_link_startup_notify,
+ .custom_phy_initialization = tc_dwc_g210_config_20_bit,
+};
+
+static struct ufs_hba_variant_ops tc_dwc_g210_40bit_pltfm_hba_vops = {
+ .name = "tc-dwc-g210-pltfm",
+ .link_startup_notify = ufshcd_dwc_link_startup_notify,
+ .custom_phy_initialization = tc_dwc_g210_config_40_bit,
+};
+
+static const struct of_device_id tc_dwc_g210_pltfm_match[] = {
+ {
+ .compatible = "snps, g210-tc-6.00-20bit",
+ .data = &tc_dwc_g210_20bit_pltfm_hba_vops,
+ },
+ {
+ .compatible = "snps, g210-tc-6.00-40bit",
+ .data = &tc_dwc_g210_40bit_pltfm_hba_vops,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tc_dwc_g210_pltfm_match);
+
+/**
+ * tc_dwc_g210_pltfm_probe()
+ * @pdev: pointer to platform device structure
+ *
+ */
+static int tc_dwc_g210_pltfm_probe(struct platform_device *pdev)
+{
+ int err;
+ const struct of_device_id *of_id;
+ struct ufs_hba_variant_ops *vops;
+ struct device *dev = &pdev->dev;
+
+ of_id = of_match_node(tc_dwc_g210_pltfm_match, dev->of_node);
+ vops = (struct ufs_hba_variant_ops *)of_id->data;
+
+ /* Perform generic probe */
+ err = ufshcd_pltfrm_init(pdev, vops);
+ if (err)
+ dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err);
+
+ return err;
+}
+
+/**
+ * tc_dwc_g210_pltfm_remove()
+ * @pdev: pointer to platform device structure
+ *
+ */
+static int tc_dwc_g210_pltfm_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 dev_pm_ops tc_dwc_g210_pltfm_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 tc_dwc_g210_pltfm_driver = {
+ .probe = tc_dwc_g210_pltfm_probe,
+ .remove = tc_dwc_g210_pltfm_remove,
+ .shutdown = ufshcd_pltfrm_shutdown,
+ .driver = {
+ .name = "tc-dwc-g210-pltfm",
+ .pm = &tc_dwc_g210_pltfm_pm_ops,
+ .of_match_table = of_match_ptr(tc_dwc_g210_pltfm_match),
+ },
+};
+
+module_platform_driver(tc_dwc_g210_pltfm_driver);
+
+MODULE_ALIAS("platform:tc-dwc-g210-pltfm");
+MODULE_DESCRIPTION("Synopsys Test Chip G210 platform glue driver");
+MODULE_AUTHOR("Joao Pinto <Joao.Pinto@xxxxxxxxxxxx>");
+MODULE_LICENSE("Dual BSD/GPL");
--
1.8.1.5