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
|
/*
* UFS Host driver for Synopsys Designware Core
*
* Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
*
* Authors: Joao Pinto <jpinto@synopsys.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "ufshcd.h"
#include "unipro.h"
#include "ufshcd-dwc.h"
#include "ufshci-dwc.h"
int ufshcd_dwc_dme_set_attrs(struct ufs_hba *hba,
const struct ufshcd_dme_attr_val *v, int n)
{
int ret = 0;
int attr_node = 0;
for (attr_node = 0; attr_node < n; attr_node++) {
ret = ufshcd_dme_set_attr(hba, v[attr_node].attr_sel,
ATTR_SET_NOR, v[attr_node].mib_val, v[attr_node].peer);
if (ret)
return ret;
}
return 0;
}
EXPORT_SYMBOL(ufshcd_dwc_dme_set_attrs);
/**
* ufshcd_dwc_program_clk_div()
* This function programs the clk divider value. This value is needed to
* provide 1 microsecond tick to unipro layer.
* @hba: Private Structure pointer
* @divider_val: clock divider value to be programmed
*
*/
static void ufshcd_dwc_program_clk_div(struct ufs_hba *hba, u32 divider_val)
{
ufshcd_writel(hba, divider_val, DWC_UFS_REG_HCLKDIV);
}
/**
* ufshcd_dwc_link_is_up()
* Check if link is up
* @hba: private structure pointer
*
* Returns 0 on success, non-zero value on failure
*/
static int ufshcd_dwc_link_is_up(struct ufs_hba *hba)
{
int dme_result = 0;
ufshcd_dme_get(hba, UIC_ARG_MIB(VS_POWERSTATE), &dme_result);
if (dme_result == UFSHCD_LINK_IS_UP) {
ufshcd_set_link_active(hba);
return 0;
}
return 1;
}
/**
* ufshcd_dwc_connection_setup()
* This function configures both the local side (host) and the peer side
* (device) unipro attributes to establish the connection to application/
* cport.
* This function is not required if the hardware is properly configured to
* have this connection setup on reset. But invoking this function does no
* harm and should be fine even working with any ufs device.
*
* @hba: pointer to drivers private data
*
* Returns 0 on success non-zero value on failure
*/
static int ufshcd_dwc_connection_setup(struct ufs_hba *hba)
{
const struct ufshcd_dme_attr_val setup_attrs[] = {
{ UIC_ARG_MIB(T_CONNECTIONSTATE), 0, DME_LOCAL },
{ UIC_ARG_MIB(N_DEVICEID), 0, DME_LOCAL },
{ UIC_ARG_MIB(N_DEVICEID_VALID), 0, DME_LOCAL },
{ UIC_ARG_MIB(T_PEERDEVICEID), 1, DME_LOCAL },
{ UIC_ARG_MIB(T_PEERCPORTID), 0, DME_LOCAL },
{ UIC_ARG_MIB(T_TRAFFICCLASS), 0, DME_LOCAL },
{ UIC_ARG_MIB(T_CPORTFLAGS), 0x6, DME_LOCAL },
{ UIC_ARG_MIB(T_CPORTMODE), 1, DME_LOCAL },
{ UIC_ARG_MIB(T_CONNECTIONSTATE), 1, DME_LOCAL },
{ UIC_ARG_MIB(T_CONNECTIONSTATE), 0, DME_PEER },
{ UIC_ARG_MIB(N_DEVICEID), 1, DME_PEER },
{ UIC_ARG_MIB(N_DEVICEID_VALID), 1, DME_PEER },
{ UIC_ARG_MIB(T_PEERDEVICEID), 1, DME_PEER },
{ UIC_ARG_MIB(T_PEERCPORTID), 0, DME_PEER },
{ UIC_ARG_MIB(T_TRAFFICCLASS), 0, DME_PEER },
{ UIC_ARG_MIB(T_CPORTFLAGS), 0x6, DME_PEER },
{ UIC_ARG_MIB(T_CPORTMODE), 1, DME_PEER },
{ UIC_ARG_MIB(T_CONNECTIONSTATE), 1, DME_PEER }
};
return ufshcd_dwc_dme_set_attrs(hba, setup_attrs, ARRAY_SIZE(setup_attrs));
}
/**
* ufshcd_dwc_link_startup_notify()
* UFS Host DWC specific link startup sequence
* @hba: private structure pointer
* @status: Callback notify status
*
* Returns 0 on success, non-zero value on failure
*/
int ufshcd_dwc_link_startup_notify(struct ufs_hba *hba,
enum ufs_notify_change_status status)
{
int err = 0;
if (status == PRE_CHANGE) {
ufshcd_dwc_program_clk_div(hba, DWC_UFS_REG_HCLKDIV_DIV_125);
if (hba->vops->phy_initialization) {
err = hba->vops->phy_initialization(hba);
if (err) {
dev_err(hba->dev, "Phy setup failed (%d)\n",
err);
goto out;
}
}
} else { /* POST_CHANGE */
err = ufshcd_dwc_link_is_up(hba);
if (err) {
dev_err(hba->dev, "Link is not up\n");
goto out;
}
err = ufshcd_dwc_connection_setup(hba);
if (err)
dev_err(hba->dev, "Connection setup failed (%d)\n",
err);
}
out:
return err;
}
EXPORT_SYMBOL(ufshcd_dwc_link_startup_notify);
MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>");
MODULE_DESCRIPTION("UFS Host driver for Synopsys Designware Core");
MODULE_LICENSE("Dual BSD/GPL");
|
