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
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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>
*/
#include "ufshcd.h"
#include <linux/pci.h>
#include <linux/pm_runtime.h>
static int ufs_intel_disable_lcc(struct ufs_hba *hba)
{
u32 attr = UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE);
u32 lcc_enable = 0;
ufshcd_dme_get(hba, attr, &lcc_enable);
if (lcc_enable)
ufshcd_disable_host_tx_lcc(hba);
return 0;
}
static int ufs_intel_link_startup_notify(struct ufs_hba *hba,
enum ufs_notify_change_status status)
{
int err = 0;
switch (status) {
case PRE_CHANGE:
err = ufs_intel_disable_lcc(hba);
break;
case POST_CHANGE:
break;
default:
break;
}
return err;
}
static int ufs_intel_ehl_init(struct ufs_hba *hba)
{
hba->quirks |= UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8;
return 0;
}
static struct ufs_hba_variant_ops ufs_intel_cnl_hba_vops = {
.name = "intel-pci",
.link_startup_notify = ufs_intel_link_startup_notify,
};
static struct ufs_hba_variant_ops ufs_intel_ehl_hba_vops = {
.name = "intel-pci",
.init = ufs_intel_ehl_init,
.link_startup_notify = ufs_intel_link_startup_notify,
};
#ifdef CONFIG_PM_SLEEP
/**
* ufshcd_pci_suspend - suspend power management function
* @dev: pointer to PCI device handle
*
* 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
* @dev: 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));
}
#endif /* !CONFIG_PM_SLEEP */
#ifdef CONFIG_PM
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));
}
#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;
}
hba->vops = (struct ufs_hba_variant_ops *)id->driver_data;
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 = {
SET_SYSTEM_SLEEP_PM_OPS(ufshcd_pci_suspend,
ufshcd_pci_resume)
SET_RUNTIME_PM_OPS(ufshcd_pci_runtime_suspend,
ufshcd_pci_runtime_resume,
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 },
{ PCI_VDEVICE(INTEL, 0x9DFA), (kernel_ulong_t)&ufs_intel_cnl_hba_vops },
{ PCI_VDEVICE(INTEL, 0x4B41), (kernel_ulong_t)&ufs_intel_ehl_hba_vops },
{ PCI_VDEVICE(INTEL, 0x4B43), (kernel_ulong_t)&ufs_intel_ehl_hba_vops },
{ } /* 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);
|
