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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2012 Sughosh Ganu <urwithsughosh@gmail.com>
*/
#include <common.h>
#include <malloc.h>
#include <asm/io.h>
#include <clk.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <dm/devres.h>
#include <dm/ofnode.h>
#include <generic-phy.h>
#include <reset.h>
#include "ohci.h"
#include <asm/arch/da8xx-usb.h>
struct da8xx_ohci {
ohci_t ohci;
struct clk *clocks; /* clock list */
struct phy phy;
int clock_count; /* number of clock in clock list */
};
static int usb_phy_on(void)
{
unsigned long timeout;
clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN |
CFGCHIP2_OTGPWRDN | CFGCHIP2_OTGMODE |
CFGCHIP2_REFFREQ | CFGCHIP2_USB1PHYCLKMUX),
(CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN |
CFGCHIP2_PHY_PLLON | CFGCHIP2_REFFREQ_24MHZ |
CFGCHIP2_USB2PHYCLKMUX | CFGCHIP2_USB1SUSPENDM));
/* wait until the usb phy pll locks */
timeout = get_timer(0);
while (get_timer(timeout) < 10) {
if (readl(&davinci_syscfg_regs->cfgchip2) & CFGCHIP2_PHYCLKGD)
return 1;
}
/* USB phy was not turned on */
return 0;
}
static void usb_phy_off(void)
{
/* Power down the on-chip PHY. */
clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
CFGCHIP2_PHY_PLLON | CFGCHIP2_USB1SUSPENDM,
CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN |
CFGCHIP2_RESET);
}
int usb_cpu_init(void)
{
/* enable psc for usb2.0 */
lpsc_on(DAVINCI_LPSC_USB20);
/* enable psc for usb1.0 */
lpsc_on(DAVINCI_LPSC_USB11);
/* start the on-chip usb phy and its pll */
if (usb_phy_on())
return 0;
return 1;
}
int usb_cpu_stop(void)
{
usb_phy_off();
/* turn off the usb clock and assert the module reset */
lpsc_disable(DAVINCI_LPSC_USB11);
lpsc_disable(DAVINCI_LPSC_USB20);
return 0;
}
int usb_cpu_init_fail(void)
{
return usb_cpu_stop();
}
#if CONFIG_IS_ENABLED(DM_USB)
static int ohci_da8xx_probe(struct udevice *dev)
{
struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
struct da8xx_ohci *priv = dev_get_priv(dev);
int i, err, ret, clock_nb;
err = 0;
priv->clock_count = 0;
clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
if (clock_nb < 0)
return clock_nb;
if (clock_nb > 0) {
priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
GFP_KERNEL);
if (!priv->clocks)
return -ENOMEM;
for (i = 0; i < clock_nb; i++) {
err = clk_get_by_index(dev, i, &priv->clocks[i]);
if (err < 0)
break;
err = clk_enable(&priv->clocks[i]);
if (err) {
dev_err(dev, "failed to enable clock %d\n", i);
clk_free(&priv->clocks[i]);
goto clk_err;
}
priv->clock_count++;
}
}
err = usb_cpu_init();
if (err)
goto clk_err;
err = ohci_register(dev, regs);
if (err)
goto phy_err;
return 0;
phy_err:
ret = usb_cpu_stop();
if (ret)
dev_err(dev, "failed to shutdown usb phy\n");
clk_err:
ret = clk_release_all(priv->clocks, priv->clock_count);
if (ret)
dev_err(dev, "failed to disable all clocks\n");
return err;
}
static int ohci_da8xx_remove(struct udevice *dev)
{
struct da8xx_ohci *priv = dev_get_priv(dev);
int ret;
ret = ohci_deregister(dev);
if (ret)
return ret;
ret = usb_cpu_stop();
if (ret)
return ret;
return clk_release_all(priv->clocks, priv->clock_count);
}
static const struct udevice_id da8xx_ohci_ids[] = {
{ .compatible = "ti,da830-ohci" },
{ }
};
U_BOOT_DRIVER(ohci_generic) = {
.name = "ohci-da8xx",
.id = UCLASS_USB,
.of_match = da8xx_ohci_ids,
.probe = ohci_da8xx_probe,
.remove = ohci_da8xx_remove,
.ops = &ohci_usb_ops,
.priv_auto_alloc_size = sizeof(struct da8xx_ohci),
.flags = DM_FLAG_ALLOC_PRIV_DMA | DM_FLAG_OS_PREPARE,
};
#endif
|
