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Vinayak Holikattie0eca632013-02-25 21:44:33 +05301/*
2 * Universal Flash Storage Host controller PCI glue driver
3 *
4 * This code is based on drivers/scsi/ufs/ufshcd-pci.c
5 * Copyright (C) 2011-2013 Samsung India Software Operations
6 *
7 * Authors:
8 * Santosh Yaraganavi <santosh.sy@samsung.com>
9 * Vinayak Holikatti <h.vinayak@samsung.com>
10 *
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>
17 *
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.
22 *
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
33 * this program.
34 */
35
36#include "ufshcd.h"
37#include <linux/pci.h>
Sujit Reddy Thumma62694732013-07-30 00:36:00 +053038#include <linux/pm_runtime.h>
Vinayak Holikattie0eca632013-02-25 21:44:33 +053039
40#ifdef CONFIG_PM
41/**
42 * ufshcd_pci_suspend - suspend power management function
43 * @pdev: pointer to PCI device handle
44 * @state: power state
45 *
Subhash Jadavani57d104c2014-09-25 15:32:30 +030046 * Returns 0 if successful
47 * Returns non-zero otherwise
Vinayak Holikattie0eca632013-02-25 21:44:33 +053048 */
Sujit Reddy Thumma62694732013-07-30 00:36:00 +053049static int ufshcd_pci_suspend(struct device *dev)
Vinayak Holikattie0eca632013-02-25 21:44:33 +053050{
Subhash Jadavani57d104c2014-09-25 15:32:30 +030051 return ufshcd_system_suspend(dev_get_drvdata(dev));
Vinayak Holikattie0eca632013-02-25 21:44:33 +053052}
53
54/**
55 * ufshcd_pci_resume - resume power management function
56 * @pdev: pointer to PCI device handle
57 *
Subhash Jadavani57d104c2014-09-25 15:32:30 +030058 * Returns 0 if successful
59 * Returns non-zero otherwise
Vinayak Holikattie0eca632013-02-25 21:44:33 +053060 */
Sujit Reddy Thumma62694732013-07-30 00:36:00 +053061static int ufshcd_pci_resume(struct device *dev)
Vinayak Holikattie0eca632013-02-25 21:44:33 +053062{
Subhash Jadavani57d104c2014-09-25 15:32:30 +030063 return ufshcd_system_resume(dev_get_drvdata(dev));
Vinayak Holikattie0eca632013-02-25 21:44:33 +053064}
Vinayak Holikattie0eca632013-02-25 21:44:33 +053065
Sujit Reddy Thumma62694732013-07-30 00:36:00 +053066static int ufshcd_pci_runtime_suspend(struct device *dev)
67{
Subhash Jadavani57d104c2014-09-25 15:32:30 +030068 return ufshcd_runtime_suspend(dev_get_drvdata(dev));
Sujit Reddy Thumma62694732013-07-30 00:36:00 +053069}
70static int ufshcd_pci_runtime_resume(struct device *dev)
71{
Subhash Jadavani57d104c2014-09-25 15:32:30 +030072 return ufshcd_runtime_resume(dev_get_drvdata(dev));
Sujit Reddy Thumma62694732013-07-30 00:36:00 +053073}
74static int ufshcd_pci_runtime_idle(struct device *dev)
75{
Subhash Jadavani57d104c2014-09-25 15:32:30 +030076 return ufshcd_runtime_idle(dev_get_drvdata(dev));
Sujit Reddy Thumma62694732013-07-30 00:36:00 +053077}
Rafael J. Wysocki4f7ad522014-12-14 23:13:55 +010078#else /* !CONFIG_PM */
79#define ufshcd_pci_suspend NULL
80#define ufshcd_pci_resume NULL
Sujit Reddy Thumma62694732013-07-30 00:36:00 +053081#define ufshcd_pci_runtime_suspend NULL
82#define ufshcd_pci_runtime_resume NULL
83#define ufshcd_pci_runtime_idle NULL
Rafael J. Wysocki4f7ad522014-12-14 23:13:55 +010084#endif /* CONFIG_PM */
Sujit Reddy Thumma62694732013-07-30 00:36:00 +053085
Vinayak Holikattie0eca632013-02-25 21:44:33 +053086/**
87 * ufshcd_pci_shutdown - main function to put the controller in reset state
88 * @pdev: pointer to PCI device handle
89 */
90static void ufshcd_pci_shutdown(struct pci_dev *pdev)
91{
Subhash Jadavani57d104c2014-09-25 15:32:30 +030092 ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
Vinayak Holikattie0eca632013-02-25 21:44:33 +053093}
94
95/**
96 * ufshcd_pci_remove - de-allocate PCI/SCSI host and host memory space
97 * data structure memory
98 * @pdev - pointer to PCI handle
99 */
100static void ufshcd_pci_remove(struct pci_dev *pdev)
101{
102 struct ufs_hba *hba = pci_get_drvdata(pdev);
103
Sujit Reddy Thumma62694732013-07-30 00:36:00 +0530104 pm_runtime_forbid(&pdev->dev);
105 pm_runtime_get_noresume(&pdev->dev);
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530106 ufshcd_remove(hba);
Subhash Jadavaniafa3dfd2016-10-27 17:25:58 -0700107 ufshcd_dealloc_host(hba);
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530108}
109
110/**
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530111 * ufshcd_pci_probe - probe routine of the driver
112 * @pdev: pointer to PCI device handle
113 * @id: PCI device id
114 *
115 * Returns 0 on success, non-zero value on failure
116 */
117static int
118ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
119{
120 struct ufs_hba *hba;
121 void __iomem *mmio_base;
122 int err;
123
Akinobu Mita36f4f3b2013-07-30 00:36:01 +0530124 err = pcim_enable_device(pdev);
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530125 if (err) {
Akinobu Mita36f4f3b2013-07-30 00:36:01 +0530126 dev_err(&pdev->dev, "pcim_enable_device failed\n");
127 return err;
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530128 }
129
130 pci_set_master(pdev);
131
Akinobu Mita36f4f3b2013-07-30 00:36:01 +0530132 err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD);
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530133 if (err < 0) {
Akinobu Mita36f4f3b2013-07-30 00:36:01 +0530134 dev_err(&pdev->dev, "request and iomap failed\n");
135 return err;
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530136 }
137
Akinobu Mita36f4f3b2013-07-30 00:36:01 +0530138 mmio_base = pcim_iomap_table(pdev)[0];
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530139
Sujit Reddy Thumma5c0c28a2014-09-25 15:32:21 +0300140 err = ufshcd_alloc_host(&pdev->dev, &hba);
141 if (err) {
142 dev_err(&pdev->dev, "Allocation failed\n");
143 return err;
144 }
145
Sujit Reddy Thummac6e79da2014-09-25 15:32:23 +0300146 INIT_LIST_HEAD(&hba->clk_list_head);
147
Sujit Reddy Thumma5c0c28a2014-09-25 15:32:21 +0300148 err = ufshcd_init(hba, mmio_base, pdev->irq);
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530149 if (err) {
150 dev_err(&pdev->dev, "Initialization failed\n");
Subhash Jadavaniafa3dfd2016-10-27 17:25:58 -0700151 ufshcd_dealloc_host(hba);
Akinobu Mita36f4f3b2013-07-30 00:36:01 +0530152 return err;
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530153 }
154
155 pci_set_drvdata(pdev, hba);
Sujit Reddy Thumma62694732013-07-30 00:36:00 +0530156 pm_runtime_put_noidle(&pdev->dev);
157 pm_runtime_allow(&pdev->dev);
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530158
159 return 0;
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530160}
161
Sujit Reddy Thumma62694732013-07-30 00:36:00 +0530162static 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,
168};
169
Benoit Taine9baa3c32014-08-08 15:56:03 +0200170static const struct pci_device_id ufshcd_pci_tbl[] = {
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530171 { PCI_VENDOR_ID_SAMSUNG, 0xC00C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
172 { } /* terminate list */
173};
174
175MODULE_DEVICE_TABLE(pci, ufshcd_pci_tbl);
176
177static struct pci_driver ufshcd_pci_driver = {
178 .name = UFSHCD,
179 .id_table = ufshcd_pci_tbl,
180 .probe = ufshcd_pci_probe,
181 .remove = ufshcd_pci_remove,
182 .shutdown = ufshcd_pci_shutdown,
Sujit Reddy Thumma62694732013-07-30 00:36:00 +0530183 .driver = {
184 .pm = &ufshcd_pci_pm_ops
185 },
Vinayak Holikattie0eca632013-02-25 21:44:33 +0530186};
187
188module_pci_driver(ufshcd_pci_driver);
189
190MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
191MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");
192MODULE_DESCRIPTION("UFS host controller PCI glue driver");
193MODULE_LICENSE("GPL");
194MODULE_VERSION(UFSHCD_DRIVER_VERSION);