ufs: add TC G210 pci driver

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

[mkp: Fixed Kconfig depends and module name]

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/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig
index 81fdfb376ea5b9465843186b532a7d24fcc9e123..47966909286dcbd19f8837d1e25d5bcab928737a 100644 (file)
--- a/drivers/scsi/ufs/Kconfig
+++ b/drivers/scsi/ufs/Kconfig
@@ -61,6 +61,14 @@ config SCSI_UFSHCD_PCI
 
          If unsure, say N.
 
+config SCSI_UFS_DWC_TC_PCI
+       tristate "DesignWare pci support using a G210 Test Chip"
+       depends on SCSI_UFSHCD && PCI
+       ---help---
+         Synopsys Test Chip is a PHY for prototyping purposes.
+
+         If unsure, say N.
+
 config SCSI_UFSHCD_PLATFORM
        tristate "Platform bus based UFS Controller support"
        depends on SCSI_UFSHCD

diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile
index d5774c64a0bb5c2e359d6b62b8ade20f5a025eb0..6e77cb0bfee914ae02190de030e87a2aa7cc70bf 100644 (file)
--- a/drivers/scsi/ufs/Makefile
+++ b/drivers/scsi/ufs/Makefile
@@ -1,4 +1,5 @@
 # UFSHCD makefile
+obj-$(CONFIG_SCSI_UFS_DWC_TC_PCI) += tc-dwc-g210-pci.o ufshcd-dwc.o tc-dwc-g210.o
 obj-$(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

diff --git a/drivers/scsi/ufs/tc-dwc-g210-pci.c b/drivers/scsi/ufs/tc-dwc-g210-pci.c
new file mode 100644 (file)
index 0000000..c09a0fe
--- /dev/null
+++ b/drivers/scsi/ufs/tc-dwc-g210-pci.c
@@ -0,0 +1,181 @@
+/*
+ * 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 "ufshcd.h"
+#include "ufshcd-dwc.h"
+#include "tc-dwc-g210.h"
+
+#include <linux/pci.h>
+#include <linux/pm_runtime.h>
+
+/* Test Chip type expected values */
+#define TC_G210_20BIT 20
+#define TC_G210_40BIT 40
+#define TC_G210_INV 0
+
+static int tc_type = TC_G210_INV;
+module_param(tc_type, int, 0);
+MODULE_PARM_DESC(tc_type, "Test Chip Type (20 = 20-bit, 40 = 40-bit)");
+
+static int tc_dwc_g210_pci_suspend(struct device *dev)
+{
+       return ufshcd_system_suspend(dev_get_drvdata(dev));
+}
+
+static int tc_dwc_g210_pci_resume(struct device *dev)
+{
+       return ufshcd_system_resume(dev_get_drvdata(dev));
+}
+
+static int tc_dwc_g210_pci_runtime_suspend(struct device *dev)
+{
+       return ufshcd_runtime_suspend(dev_get_drvdata(dev));
+}
+
+static int tc_dwc_g210_pci_runtime_resume(struct device *dev)
+{
+       return ufshcd_runtime_resume(dev_get_drvdata(dev));
+}
+
+static int tc_dwc_g210_pci_runtime_idle(struct device *dev)
+{
+       return ufshcd_runtime_idle(dev_get_drvdata(dev));
+}
+
+/**
+ * struct ufs_hba_dwc_vops - UFS DWC specific variant operations
+ */
+static struct ufs_hba_variant_ops tc_dwc_g210_pci_hba_vops = {
+       .name                   = "tc-dwc-g210-pci",
+       .link_startup_notify    = ufshcd_dwc_link_startup_notify,
+};
+
+/**
+ * tc_dwc_g210_pci_shutdown - main function to put the controller in reset state
+ * @pdev: pointer to PCI device handle
+ */
+static void tc_dwc_g210_pci_shutdown(struct pci_dev *pdev)
+{
+       ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
+}
+
+/**
+ * tc_dwc_g210_pci_remove - de-allocate PCI/SCSI host and host memory space
+ *             data structure memory
+ * @pdev - pointer to PCI handle
+ */
+static void tc_dwc_g210_pci_remove(struct pci_dev *pdev)
+{
+       struct ufs_hba *hba = pci_get_drvdata(pdev);
+
+       pm_runtime_forbid(&pdev->dev);
+       pm_runtime_get_noresume(&pdev->dev);
+       ufshcd_remove(hba);
+}
+
+/**
+ * tc_dwc_g210_pci_probe - probe routine of the driver
+ * @pdev: pointer to PCI device handle
+ * @id: PCI device id
+ *
+ * Returns 0 on success, non-zero value on failure
+ */
+static int
+tc_dwc_g210_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+       struct ufs_hba *hba;
+       void __iomem *mmio_base;
+       int err;
+
+       /* Check Test Chip type and set the specific setup routine */
+       if (tc_type == TC_G210_20BIT) {
+               tc_dwc_g210_pci_hba_vops.phy_initialization =
+                                               tc_dwc_g210_config_20_bit;
+       } else if (tc_type == TC_G210_40BIT) {
+               tc_dwc_g210_pci_hba_vops.phy_initialization =
+                                               tc_dwc_g210_config_40_bit;
+       } else {
+               dev_err(&pdev->dev, "test chip version not specified\n");
+               return -EPERM;
+       }
+
+       err = pcim_enable_device(pdev);
+       if (err) {
+               dev_err(&pdev->dev, "pcim_enable_device failed\n");
+               return err;
+       }
+
+       pci_set_master(pdev);
+
+       err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD);
+       if (err < 0) {
+               dev_err(&pdev->dev, "request and iomap failed\n");
+               return err;
+       }
+
+       mmio_base = pcim_iomap_table(pdev)[0];
+
+       err = ufshcd_alloc_host(&pdev->dev, &hba);
+       if (err) {
+               dev_err(&pdev->dev, "Allocation failed\n");
+               return err;
+       }
+
+       INIT_LIST_HEAD(&hba->clk_list_head);
+
+       hba->vops = &tc_dwc_g210_pci_hba_vops;
+
+       err = ufshcd_init(hba, mmio_base, pdev->irq);
+       if (err) {
+               dev_err(&pdev->dev, "Initialization failed\n");
+               return err;
+       }
+
+       pci_set_drvdata(pdev, hba);
+       pm_runtime_put_noidle(&pdev->dev);
+       pm_runtime_allow(&pdev->dev);
+
+       return 0;
+}
+
+static const struct dev_pm_ops tc_dwc_g210_pci_pm_ops = {
+       .suspend        = tc_dwc_g210_pci_suspend,
+       .resume         = tc_dwc_g210_pci_resume,
+       .runtime_suspend = tc_dwc_g210_pci_runtime_suspend,
+       .runtime_resume  = tc_dwc_g210_pci_runtime_resume,
+       .runtime_idle    = tc_dwc_g210_pci_runtime_idle,
+};
+
+static const struct pci_device_id tc_dwc_g210_pci_tbl[] = {
+       { PCI_VENDOR_ID_SYNOPSYS, 0xB101, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+       { PCI_VENDOR_ID_SYNOPSYS, 0xB102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+       { }     /* terminate list */
+};
+
+MODULE_DEVICE_TABLE(pci, tc_dwc_g210_pci_tbl);
+
+static struct pci_driver tc_dwc_g210_pci_driver = {
+       .name = "tc-dwc-g210-pci",
+       .id_table = tc_dwc_g210_pci_tbl,
+       .probe = tc_dwc_g210_pci_probe,
+       .remove = tc_dwc_g210_pci_remove,
+       .shutdown = tc_dwc_g210_pci_shutdown,
+       .driver = {
+               .pm = &tc_dwc_g210_pci_pm_ops
+       },
+};
+
+module_pci_driver(tc_dwc_g210_pci_driver);
+
+MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>");
+MODULE_DESCRIPTION("Synopsys Test Chip G210 PCI glue driver");
+MODULE_LICENSE("Dual BSD/GPL");