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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
|
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
* 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.
*/
/*
* Vybrid Family Port control and interrupts (PORT)
* Chapter 6, Vybrid Reference Manual, Rev. 5, 07/2013
*/
#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 <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <arm/freescale/vybrid/vf_port.h>
#include <arm/freescale/vybrid/vf_common.h>
/* Pin Control Register */
#define PORT_PCR(n) (0x1000 * (n >> 5) + 0x4 * (n % 32))
#define PCR_IRQC_S 16
#define PCR_IRQC_M 0xF
#define PCR_DMA_RE 0x1
#define PCR_DMA_FE 0x2
#define PCR_DMA_EE 0x3
#define PCR_INT_LZ 0x8
#define PCR_INT_RE 0x9
#define PCR_INT_FE 0xA
#define PCR_INT_EE 0xB
#define PCR_INT_LO 0xC
#define PCR_ISF (1 << 24)
#define PORT0_ISFR 0xA0 /* Interrupt Status Flag Register */
#define PORT0_DFER 0xC0 /* Digital Filter Enable Register */
#define PORT0_DFCR 0xC4 /* Digital Filter Clock Register */
#define PORT0_DFWR 0xC8 /* Digital Filter Width Register */
struct port_event {
uint32_t enabled;
uint32_t mux_num;
uint32_t mux_src;
uint32_t mux_chn;
void (*ih) (void *);
void *ih_user;
enum ev_type pevt;
};
static struct port_event event_map[NGPIO];
struct port_softc {
struct resource *res[6];
bus_space_tag_t bst;
bus_space_handle_t bsh;
void *gpio_ih[NGPIO];
};
struct port_softc *port_sc;
static struct resource_spec port_spec[] = {
{ SYS_RES_MEMORY, 0, RF_ACTIVE },
{ SYS_RES_IRQ, 0, RF_ACTIVE },
{ SYS_RES_IRQ, 1, RF_ACTIVE },
{ SYS_RES_IRQ, 2, RF_ACTIVE },
{ SYS_RES_IRQ, 3, RF_ACTIVE },
{ SYS_RES_IRQ, 4, RF_ACTIVE },
{ -1, 0 }
};
static int
port_intr(void *arg)
{
struct port_event *pev;
struct port_softc *sc;
int reg;
int i;
sc = arg;
for (i = 0; i < NGPIO; i++) {
reg = READ4(sc, PORT_PCR(i));
if (reg & PCR_ISF) {
/* Clear interrupt */
WRITE4(sc, PORT_PCR(i), reg);
/* Handle event */
pev = &event_map[i];
if (pev->enabled == 1) {
if (pev->ih != NULL) {
pev->ih(pev->ih_user);
}
}
}
}
return (FILTER_HANDLED);
}
int
port_setup(int pnum, enum ev_type pevt, void (*ih)(void *), void *ih_user)
{
struct port_event *pev;
struct port_softc *sc;
int reg;
int val;
sc = port_sc;
switch (pevt) {
case DMA_RISING_EDGE:
val = PCR_DMA_RE;
break;
case DMA_FALLING_EDGE:
val = PCR_DMA_FE;
break;
case DMA_EITHER_EDGE:
val = PCR_DMA_EE;
break;
case INT_LOGIC_ZERO:
val = PCR_INT_LZ;
break;
case INT_RISING_EDGE:
val = PCR_INT_RE;
break;
case INT_FALLING_EDGE:
val = PCR_INT_FE;
break;
case INT_EITHER_EDGE:
val = PCR_INT_EE;
break;
case INT_LOGIC_ONE:
val = PCR_INT_LO;
break;
default:
return (-1);
}
reg = READ4(sc, PORT_PCR(pnum));
reg &= ~(PCR_IRQC_M << PCR_IRQC_S);
reg |= (val << PCR_IRQC_S);
WRITE4(sc, PORT_PCR(pnum), reg);
pev = &event_map[pnum];
pev->ih = ih;
pev->ih_user = ih_user;
pev->pevt = pevt;
pev->enabled = 1;
return (0);
}
static int
port_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (!ofw_bus_is_compatible(dev, "fsl,mvf600-port"))
return (ENXIO);
device_set_desc(dev, "Vybrid Family Port control and interrupts");
return (BUS_PROBE_DEFAULT);
}
static int
port_attach(device_t dev)
{
struct port_softc *sc;
int irq;
sc = device_get_softc(dev);
if (bus_alloc_resources(dev, port_spec, sc->res)) {
device_printf(dev, "could not allocate resources\n");
return (ENXIO);
}
/* Memory interface */
sc->bst = rman_get_bustag(sc->res[0]);
sc->bsh = rman_get_bushandle(sc->res[0]);
port_sc = sc;
for (irq = 0; irq < NPORTS; irq ++) {
if ((bus_setup_intr(dev, sc->res[1 + irq], INTR_TYPE_MISC,
port_intr, NULL, sc, &sc->gpio_ih[irq]))) {
device_printf(dev,
"ERROR: Unable to register interrupt handler\n");
return (ENXIO);
}
}
return (0);
}
static device_method_t port_methods[] = {
DEVMETHOD(device_probe, port_probe),
DEVMETHOD(device_attach, port_attach),
{ 0, 0 }
};
static driver_t port_driver = {
"port",
port_methods,
sizeof(struct port_softc),
};
static devclass_t port_devclass;
DRIVER_MODULE(port, simplebus, port_driver, port_devclass, 0, 0);
|
