summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/ufs/ufshcd-pci.c
blob: 52b546fb509b7a3636b8a9b65ee7f6c03dc10171 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
/*
 * Universal Flash Storage Host controller PCI glue driver
 *
 * This code is based on drivers/scsi/ufs/ufshcd-pci.c
 * Copyright (C) 2011-2013 Samsung India Software Operations
 *
 * Authors:
 *	Santosh Yaraganavi <santosh.sy@samsung.com>
 *	Vinayak Holikatti <h.vinayak@samsung.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * See the COPYING file in the top-level directory or visit
 * <http://www.gnu.org/licenses/gpl-2.0.html>
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * This program is provided "AS IS" and "WITH ALL FAULTS" and
 * without warranty of any kind. You are solely responsible for
 * determining the appropriateness of using and distributing
 * the program and assume all risks associated with your exercise
 * of rights with respect to the program, including but not limited
 * to infringement of third party rights, the risks and costs of
 * program errors, damage to or loss of data, programs or equipment,
 * and unavailability or interruption of operations. Under no
 * circumstances will the contributor of this Program be liable for
 * any damages of any kind arising from your use or distribution of
 * this program.
 */

#include "ufshcd.h"
#include <linux/pci.h>
#include <linux/pm_runtime.h>

#ifdef CONFIG_PM
/**
 * ufshcd_pci_suspend - suspend power management function
 * @pdev: pointer to PCI device handle
 * @state: power state
 *
 * Returns 0 if successful
 * Returns non-zero otherwise
 */
static int ufshcd_pci_suspend(struct device *dev)
{
	return ufshcd_system_suspend(dev_get_drvdata(dev));
}

/**
 * ufshcd_pci_resume - resume power management function
 * @pdev: pointer to PCI device handle
 *
 * Returns 0 if successful
 * Returns non-zero otherwise
 */
static int ufshcd_pci_resume(struct device *dev)
{
	return ufshcd_system_resume(dev_get_drvdata(dev));
}

static int ufshcd_pci_runtime_suspend(struct device *dev)
{
	return ufshcd_runtime_suspend(dev_get_drvdata(dev));
}
static int ufshcd_pci_runtime_resume(struct device *dev)
{
	return ufshcd_runtime_resume(dev_get_drvdata(dev));
}
static int ufshcd_pci_runtime_idle(struct device *dev)
{
	return ufshcd_runtime_idle(dev_get_drvdata(dev));
}
#else /* !CONFIG_PM */
#define ufshcd_pci_suspend	NULL
#define ufshcd_pci_resume	NULL
#define ufshcd_pci_runtime_suspend	NULL
#define ufshcd_pci_runtime_resume	NULL
#define ufshcd_pci_runtime_idle	NULL
#endif /* CONFIG_PM */

/**
 * ufshcd_pci_shutdown - main function to put the controller in reset state
 * @pdev: pointer to PCI device handle
 */
static void ufshcd_pci_shutdown(struct pci_dev *pdev)
{
	ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
}

/**
 * ufshcd_pci_remove - de-allocate PCI/SCSI host and host memory space
 *		data structure memory
 * @pdev - pointer to PCI handle
 */
static void ufshcd_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);
	ufshcd_dealloc_host(hba);
}

/**
 * ufshcd_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
ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	struct ufs_hba *hba;
	void __iomem *mmio_base;
	int err;

	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);

	err = ufshcd_init(hba, mmio_base, pdev->irq);
	if (err) {
		dev_err(&pdev->dev, "Initialization failed\n");
		ufshcd_dealloc_host(hba);
		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 ufshcd_pci_pm_ops = {
	.suspend	= ufshcd_pci_suspend,
	.resume		= ufshcd_pci_resume,
	.runtime_suspend = ufshcd_pci_runtime_suspend,
	.runtime_resume  = ufshcd_pci_runtime_resume,
	.runtime_idle    = ufshcd_pci_runtime_idle,
};

static const struct pci_device_id ufshcd_pci_tbl[] = {
	{ PCI_VENDOR_ID_SAMSUNG, 0xC00C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
	{ }	/* terminate list */
};

MODULE_DEVICE_TABLE(pci, ufshcd_pci_tbl);

static struct pci_driver ufshcd_pci_driver = {
	.name = UFSHCD,
	.id_table = ufshcd_pci_tbl,
	.probe = ufshcd_pci_probe,
	.remove = ufshcd_pci_remove,
	.shutdown = ufshcd_pci_shutdown,
	.driver = {
		.pm = &ufshcd_pci_pm_ops
	},
};

module_pci_driver(ufshcd_pci_driver);

MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");
MODULE_DESCRIPTION("UFS host controller PCI glue driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(UFSHCD_DRIVER_VERSION);
OpenPOWER on IntegriCloud