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
|
/*
* host.c - ChipIdea USB host controller driver
*
* Copyright (c) 2012 Intel Corporation
*
* Author: Alexander Shishkin
*
* 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/chipidea.h>
#include <linux/regulator/consumer.h>
#include "../host/ehci.h"
#include "ci.h"
#include "bits.h"
#include "host.h"
static struct hc_driver __read_mostly ci_ehci_hc_driver;
static irqreturn_t host_irq(struct ci_hdrc *ci)
{
return usb_hcd_irq(ci->irq, ci->hcd);
}
static int host_start(struct ci_hdrc *ci)
{
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
int ret;
if (usb_disabled())
return -ENODEV;
hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev));
if (!hcd)
return -ENOMEM;
dev_set_drvdata(ci->dev, ci);
hcd->rsrc_start = ci->hw_bank.phys;
hcd->rsrc_len = ci->hw_bank.size;
hcd->regs = ci->hw_bank.abs;
hcd->has_tt = 1;
hcd->power_budget = ci->platdata->power_budget;
hcd->phy = ci->transceiver;
ehci = hcd_to_ehci(hcd);
ehci->caps = ci->hw_bank.cap;
ehci->has_hostpc = ci->hw_bank.lpm;
ehci->has_tdi_phy_lpm = ci->hw_bank.lpm;
ehci->imx28_write_fix = ci->imx28_write_fix;
/*
* vbus is always on if host is not in OTG FSM mode,
* otherwise should be controlled by OTG FSM
*/
if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) {
ret = regulator_enable(ci->platdata->reg_vbus);
if (ret) {
dev_err(ci->dev,
"Failed to enable vbus regulator, ret=%d\n",
ret);
goto put_hcd;
}
}
ret = usb_add_hcd(hcd, 0, 0);
if (ret) {
goto disable_reg;
} else {
struct usb_otg *otg = ci->transceiver->otg;
ci->hcd = hcd;
if (otg) {
otg->host = &hcd->self;
hcd->self.otg_port = 1;
}
}
if (ci->platdata->flags & CI_HDRC_DISABLE_STREAMING)
hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, USBMODE_CI_SDIS);
return ret;
disable_reg:
if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci))
regulator_disable(ci->platdata->reg_vbus);
put_hcd:
usb_put_hcd(hcd);
return ret;
}
static void host_stop(struct ci_hdrc *ci)
{
struct usb_hcd *hcd = ci->hcd;
if (hcd) {
usb_remove_hcd(hcd);
usb_put_hcd(hcd);
if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci))
regulator_disable(ci->platdata->reg_vbus);
}
}
void ci_hdrc_host_destroy(struct ci_hdrc *ci)
{
if (ci->role == CI_ROLE_HOST && ci->hcd)
host_stop(ci);
}
int ci_hdrc_host_init(struct ci_hdrc *ci)
{
struct ci_role_driver *rdrv;
if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
return -ENXIO;
rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
if (!rdrv)
return -ENOMEM;
rdrv->start = host_start;
rdrv->stop = host_stop;
rdrv->irq = host_irq;
rdrv->name = "host";
ci->roles[CI_ROLE_HOST] = rdrv;
ehci_init_driver(&ci_ehci_hc_driver, NULL);
return 0;
}
|
