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
|
/*-
* Copyright (c) 2013 Ganbold Tsagaankhuu <ganbold@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* Simple clock driver for Allwinner A10 */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/rman.h>
#include <sys/timeet.h>
#include <sys/timetc.h>
#include <sys/watchdog.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include "a10_clk.h"
struct a10_ccm_softc {
struct resource *res;
bus_space_tag_t bst;
bus_space_handle_t bsh;
};
static struct a10_ccm_softc *a10_ccm_sc = NULL;
#define ccm_read_4(sc, reg) \
bus_space_read_4((sc)->bst, (sc)->bsh, (reg))
#define ccm_write_4(sc, reg, val) \
bus_space_write_4((sc)->bst, (sc)->bsh, (reg), (val))
static int
a10_ccm_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (ofw_bus_is_compatible(dev, "allwinner,sun4i-ccm")) {
device_set_desc(dev, "Allwinner Clock Control Module");
return(BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
static int
a10_ccm_attach(device_t dev)
{
struct a10_ccm_softc *sc = device_get_softc(dev);
int rid = 0;
if (a10_ccm_sc)
return (ENXIO);
sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (!sc->res) {
device_printf(dev, "could not allocate resource\n");
return (ENXIO);
}
sc->bst = rman_get_bustag(sc->res);
sc->bsh = rman_get_bushandle(sc->res);
a10_ccm_sc = sc;
return (0);
}
static device_method_t a10_ccm_methods[] = {
DEVMETHOD(device_probe, a10_ccm_probe),
DEVMETHOD(device_attach, a10_ccm_attach),
{ 0, 0 }
};
static driver_t a10_ccm_driver = {
"a10_ccm",
a10_ccm_methods,
sizeof(struct a10_ccm_softc),
};
static devclass_t a10_ccm_devclass;
DRIVER_MODULE(a10_ccm, simplebus, a10_ccm_driver, a10_ccm_devclass, 0, 0);
int
a10_clk_usb_activate(void)
{
struct a10_ccm_softc *sc = a10_ccm_sc;
uint32_t reg_value;
if (sc == NULL)
return (ENXIO);
/* Gating AHB clock for USB */
reg_value = ccm_read_4(sc, CCM_AHB_GATING0);
reg_value |= CCM_AHB_GATING_USB0; /* AHB clock gate usb0 */
reg_value |= CCM_AHB_GATING_EHCI0; /* AHB clock gate ehci1 */
reg_value |= CCM_AHB_GATING_EHCI1; /* AHB clock gate ehci1 */
ccm_write_4(sc, CCM_AHB_GATING0, reg_value);
/* Enable clock for USB */
reg_value = ccm_read_4(sc, CCM_USB_CLK);
reg_value |= CCM_USB_PHY; /* USBPHY */
reg_value |= CCM_USB0_RESET; /* disable reset for USB0 */
reg_value |= CCM_USB1_RESET; /* disable reset for USB1 */
reg_value |= CCM_USB2_RESET; /* disable reset for USB2 */
ccm_write_4(sc, CCM_USB_CLK, reg_value);
return (0);
}
int
a10_clk_usb_deactivate(void)
{
struct a10_ccm_softc *sc = a10_ccm_sc;
uint32_t reg_value;
if (sc == NULL)
return (ENXIO);
/* Disable clock for USB */
reg_value = ccm_read_4(sc, CCM_USB_CLK);
reg_value &= ~CCM_USB_PHY; /* USBPHY */
reg_value &= ~CCM_USB0_RESET; /* reset for USB0 */
reg_value &= ~CCM_USB1_RESET; /* reset for USB1 */
reg_value &= ~CCM_USB2_RESET; /* reset for USB2 */
ccm_write_4(sc, CCM_USB_CLK, reg_value);
/* Disable gating AHB clock for USB */
reg_value = ccm_read_4(sc, CCM_AHB_GATING0);
reg_value &= ~CCM_AHB_GATING_USB0; /* disable AHB clock gate usb0 */
reg_value &= ~CCM_AHB_GATING_EHCI1; /* disable AHB clock gate ehci1 */
ccm_write_4(sc, CCM_AHB_GATING0, reg_value);
return (0);
}
int
a10_clk_emac_activate(void) {
struct a10_ccm_softc *sc = a10_ccm_sc;
uint32_t reg_value;
if (sc == NULL)
return (ENXIO);
/* Gating AHB clock for EMAC */
reg_value = ccm_read_4(sc, CCM_AHB_GATING0);
reg_value |= CCM_AHB_GATING_EMAC;
ccm_write_4(sc, CCM_AHB_GATING0, reg_value);
return (0);
}
|
