ufs: add TC G210 platform driver

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

Signed-off-by: Joao Pinto <jpinto@synopsys.com>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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 (file)
index 0000000..71c0777
--- /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 097894a..81fdfb3 100644 (file)
--- a/drivers/scsi/ufs/Kconfig
+++ b/drivers/scsi/ufs/Kconfig
@@ -72,6 +72,14 @@ config SCSI_UFSHCD_PLATFORM
 
          If unsure, say N.
 
+config SCSI_UFS_DWC_TC_PLATFORM
+       tristate "DesignWare platform support using a G210 Test Chip"
+       depends on SCSI_UFSHCD_PLATFORM
+       ---help---
+         Synopsys Test Chip is a PHY for prototyping purposes.
+
+         If unsure, say N.
+
 config SCSI_UFS_QCOM
        tristate "QCOM specific hooks to UFS controller platform driver"
        depends on SCSI_UFSHCD_PLATFORM && ARCH_QCOM

diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile
index 8303bcc..d5774c6 100644 (file)
--- a/drivers/scsi/ufs/Makefile
+++ b/drivers/scsi/ufs/Makefile
@@ -1,4 +1,5 @@
 # UFSHCD makefile
+obj-$(CONFIG_SCSI_UFS_DWC_TC_PLATFORM) += tc-dwc-g210-pltfrm.o ufshcd-dwc.o tc-dwc-g210.o
 obj-$(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 (file)
index 0000000..2d3f527
--- /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@synopsys.com>
+ *
+ * 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,
+       .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,
+       .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@synopsys.com>");
+MODULE_LICENSE("Dual BSD/GPL");