2 * Universal Flash Storage Host controller PCI glue driver
4 * This code is based on drivers/scsi/ufs/ufshcd-pci.c
5 * Copyright (C) 2011-2013 Samsung India Software Operations
8 * Santosh Yaraganavi <santosh.sy@samsung.com>
9 * Vinayak Holikatti <h.vinayak@samsung.com>
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
15 * See the COPYING file in the top-level directory or visit
16 * <http://www.gnu.org/licenses/gpl-2.0.html>
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * This program is provided "AS IS" and "WITH ALL FAULTS" and
24 * without warranty of any kind. You are solely responsible for
25 * determining the appropriateness of using and distributing
26 * the program and assume all risks associated with your exercise
27 * of rights with respect to the program, including but not limited
28 * to infringement of third party rights, the risks and costs of
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30 * and unavailability or interruption of operations. Under no
31 * circumstances will the contributor of this Program be liable for
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37 #include <linux/pci.h>
38 #include <linux/pm_runtime.h>
42 * ufshcd_pci_suspend - suspend power management function
43 * @pdev: pointer to PCI device handle
46 * Returns 0 if successful
47 * Returns non-zero otherwise
49 static int ufshcd_pci_suspend(struct device *dev)
51 return ufshcd_system_suspend(dev_get_drvdata(dev));
55 * ufshcd_pci_resume - resume power management function
56 * @pdev: pointer to PCI device handle
58 * Returns 0 if successful
59 * Returns non-zero otherwise
61 static int ufshcd_pci_resume(struct device *dev)
63 return ufshcd_system_resume(dev_get_drvdata(dev));
66 static int ufshcd_pci_runtime_suspend(struct device *dev)
68 return ufshcd_runtime_suspend(dev_get_drvdata(dev));
70 static int ufshcd_pci_runtime_resume(struct device *dev)
72 return ufshcd_runtime_resume(dev_get_drvdata(dev));
74 static int ufshcd_pci_runtime_idle(struct device *dev)
76 return ufshcd_runtime_idle(dev_get_drvdata(dev));
78 #else /* !CONFIG_PM */
79 #define ufshcd_pci_suspend NULL
80 #define ufshcd_pci_resume NULL
81 #define ufshcd_pci_runtime_suspend NULL
82 #define ufshcd_pci_runtime_resume NULL
83 #define ufshcd_pci_runtime_idle NULL
84 #endif /* CONFIG_PM */
87 * ufshcd_pci_shutdown - main function to put the controller in reset state
88 * @pdev: pointer to PCI device handle
90 static void ufshcd_pci_shutdown(struct pci_dev *pdev)
92 ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
96 * ufshcd_pci_remove - de-allocate PCI/SCSI host and host memory space
97 * data structure memory
98 * @pdev - pointer to PCI handle
100 static void ufshcd_pci_remove(struct pci_dev *pdev)
102 struct ufs_hba *hba = pci_get_drvdata(pdev);
104 pm_runtime_forbid(&pdev->dev);
105 pm_runtime_get_noresume(&pdev->dev);
107 ufshcd_dealloc_host(hba);
111 * ufshcd_pci_probe - probe routine of the driver
112 * @pdev: pointer to PCI device handle
115 * Returns 0 on success, non-zero value on failure
118 ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
121 void __iomem *mmio_base;
124 err = pcim_enable_device(pdev);
126 dev_err(&pdev->dev, "pcim_enable_device failed\n");
130 pci_set_master(pdev);
132 err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD);
134 dev_err(&pdev->dev, "request and iomap failed\n");
138 mmio_base = pcim_iomap_table(pdev)[0];
140 err = ufshcd_alloc_host(&pdev->dev, &hba);
142 dev_err(&pdev->dev, "Allocation failed\n");
146 INIT_LIST_HEAD(&hba->clk_list_head);
148 err = ufshcd_init(hba, mmio_base, pdev->irq);
150 dev_err(&pdev->dev, "Initialization failed\n");
151 ufshcd_dealloc_host(hba);
155 pci_set_drvdata(pdev, hba);
156 pm_runtime_put_noidle(&pdev->dev);
157 pm_runtime_allow(&pdev->dev);
162 static const struct dev_pm_ops ufshcd_pci_pm_ops = {
163 .suspend = ufshcd_pci_suspend,
164 .resume = ufshcd_pci_resume,
165 .runtime_suspend = ufshcd_pci_runtime_suspend,
166 .runtime_resume = ufshcd_pci_runtime_resume,
167 .runtime_idle = ufshcd_pci_runtime_idle,
170 static const struct pci_device_id ufshcd_pci_tbl[] = {
171 { PCI_VENDOR_ID_SAMSUNG, 0xC00C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
172 { } /* terminate list */
175 MODULE_DEVICE_TABLE(pci, ufshcd_pci_tbl);
177 static struct pci_driver ufshcd_pci_driver = {
179 .id_table = ufshcd_pci_tbl,
180 .probe = ufshcd_pci_probe,
181 .remove = ufshcd_pci_remove,
182 .shutdown = ufshcd_pci_shutdown,
184 .pm = &ufshcd_pci_pm_ops
188 module_pci_driver(ufshcd_pci_driver);
190 MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
191 MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");
192 MODULE_DESCRIPTION("UFS host controller PCI glue driver");
193 MODULE_LICENSE("GPL");
194 MODULE_VERSION(UFSHCD_DRIVER_VERSION);