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
29 * program errors, damage to or loss of data, programs or equipment,
30 * and unavailability or interruption of operations. Under no
31 * circumstances will the contributor of this Program be liable for
32 * any damages of any kind arising from your use or distribution of
37 #include <linux/pci.h>
41 * ufshcd_pci_suspend - suspend power management function
42 * @pdev: pointer to PCI device handle
47 static int ufshcd_pci_suspend(struct pci_dev *pdev, pm_message_t state)
51 * 1. Call ufshcd_suspend
52 * 2. Do bus specific power management
59 * ufshcd_pci_resume - resume power management function
60 * @pdev: pointer to PCI device handle
64 static int ufshcd_pci_resume(struct pci_dev *pdev)
68 * 1. Call ufshcd_resume.
69 * 2. Do bus specific wake up
74 #endif /* CONFIG_PM */
77 * ufshcd_pci_shutdown - main function to put the controller in reset state
78 * @pdev: pointer to PCI device handle
80 static void ufshcd_pci_shutdown(struct pci_dev *pdev)
82 ufshcd_hba_stop((struct ufs_hba *)pci_get_drvdata(pdev));
86 * ufshcd_pci_remove - de-allocate PCI/SCSI host and host memory space
87 * data structure memory
88 * @pdev - pointer to PCI handle
90 static void ufshcd_pci_remove(struct pci_dev *pdev)
92 struct ufs_hba *hba = pci_get_drvdata(pdev);
94 disable_irq(pdev->irq);
95 free_irq(pdev->irq, hba);
97 pci_release_regions(pdev);
98 pci_set_drvdata(pdev, NULL);
99 pci_clear_master(pdev);
100 pci_disable_device(pdev);
104 * ufshcd_set_dma_mask - Set dma mask based on the controller
105 * addressing capability
106 * @pdev: PCI device structure
108 * Returns 0 for success, non-zero for failure
110 static int ufshcd_set_dma_mask(struct pci_dev *pdev)
114 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
115 && !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
117 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
119 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
124 * ufshcd_pci_probe - probe routine of the driver
125 * @pdev: pointer to PCI device handle
128 * Returns 0 on success, non-zero value on failure
131 ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
134 void __iomem *mmio_base;
137 err = pci_enable_device(pdev);
139 dev_err(&pdev->dev, "pci_enable_device failed\n");
143 pci_set_master(pdev);
146 err = pci_request_regions(pdev, UFSHCD);
148 dev_err(&pdev->dev, "request regions failed\n");
152 mmio_base = pci_ioremap_bar(pdev, 0);
154 dev_err(&pdev->dev, "memory map failed\n");
156 goto out_release_regions;
159 err = ufshcd_set_dma_mask(pdev);
161 dev_err(&pdev->dev, "set dma mask failed\n");
165 err = ufshcd_init(&pdev->dev, &hba, mmio_base, pdev->irq);
167 dev_err(&pdev->dev, "Initialization failed\n");
171 pci_set_drvdata(pdev, hba);
178 pci_release_regions(pdev);
180 pci_clear_master(pdev);
181 pci_disable_device(pdev);
186 static DEFINE_PCI_DEVICE_TABLE(ufshcd_pci_tbl) = {
187 { PCI_VENDOR_ID_SAMSUNG, 0xC00C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
188 { } /* terminate list */
191 MODULE_DEVICE_TABLE(pci, ufshcd_pci_tbl);
193 static struct pci_driver ufshcd_pci_driver = {
195 .id_table = ufshcd_pci_tbl,
196 .probe = ufshcd_pci_probe,
197 .remove = ufshcd_pci_remove,
198 .shutdown = ufshcd_pci_shutdown,
200 .suspend = ufshcd_pci_suspend,
201 .resume = ufshcd_pci_resume,
205 module_pci_driver(ufshcd_pci_driver);
207 MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
208 MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");
209 MODULE_DESCRIPTION("UFS host controller PCI glue driver");
210 MODULE_LICENSE("GPL");
211 MODULE_VERSION(UFSHCD_DRIVER_VERSION);