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
|
/*-
* 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.
*
* $FreeBSD$
*/
#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/frame.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 "a10_sramc.h"
#define SRAM_CTL1_CFG 0x04
#define CTL1_CFG_SRAMD_MAP_USB0 (1 << 0)
struct a10_sramc_softc {
struct resource *res;
bus_space_tag_t bst;
bus_space_handle_t bsh;
};
static struct a10_sramc_softc *a10_sramc_sc;
#define sramc_read_4(sc, reg) \
bus_space_read_4((sc)->bst, (sc)->bsh, (reg))
#define sramc_write_4(sc, reg, val) \
bus_space_write_4((sc)->bst, (sc)->bsh, (reg), (val))
static int
a10_sramc_probe(device_t dev)
{
if (ofw_bus_is_compatible(dev, "allwinner,sun4i-a10-sram-controller")) {
device_set_desc(dev, "Allwinner sramc module");
return (BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
static int
a10_sramc_attach(device_t dev)
{
struct a10_sramc_softc *sc = device_get_softc(dev);
int rid = 0;
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_sramc_sc = sc;
return (0);
}
static device_method_t a10_sramc_methods[] = {
DEVMETHOD(device_probe, a10_sramc_probe),
DEVMETHOD(device_attach, a10_sramc_attach),
{ 0, 0 }
};
static driver_t a10_sramc_driver = {
"a10_sramc",
a10_sramc_methods,
sizeof(struct a10_sramc_softc),
};
static devclass_t a10_sramc_devclass;
EARLY_DRIVER_MODULE(a10_sramc, simplebus, a10_sramc_driver, a10_sramc_devclass,
0, 0, BUS_PASS_RESOURCE + BUS_PASS_ORDER_EARLY);
int
a10_map_to_emac(void)
{
struct a10_sramc_softc *sc = a10_sramc_sc;
uint32_t reg_value;
if (sc == NULL)
return (ENXIO);
/* Map SRAM to EMAC, set bit 2 and 4. */
reg_value = sramc_read_4(sc, SRAM_CTL1_CFG);
reg_value |= 0x5 << 2;
sramc_write_4(sc, SRAM_CTL1_CFG, reg_value);
return (0);
}
int
a10_map_to_otg(void)
{
struct a10_sramc_softc *sc = a10_sramc_sc;
uint32_t reg_value;
if (sc == NULL)
return (ENXIO);
/* Map SRAM to OTG */
reg_value = sramc_read_4(sc, SRAM_CTL1_CFG);
reg_value |= CTL1_CFG_SRAMD_MAP_USB0;
sramc_write_4(sc, SRAM_CTL1_CFG, reg_value);
return (0);
}
|
