target/ppc: Fix slbia TLB invalidation gap
[qemu.git] / hw / i2c / versatile_i2c.c
1 /*
2 * ARM Versatile I2C controller
3 *
4 * Copyright (c) 2006-2007 CodeSourcery.
5 * Copyright (c) 2012 Oskar Andero <oskar.andero@gmail.com>
6 *
7 * This file is derived from hw/realview.c by Paul Brook
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version 2
12 * of the License, or (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 *
22 */
23
24 #include "qemu/osdep.h"
25 #include "hw/sysbus.h"
26 #include "hw/i2c/bitbang_i2c.h"
27 #include "qemu/log.h"
28 #include "qemu/module.h"
29
30 #define TYPE_VERSATILE_I2C "versatile_i2c"
31 #define VERSATILE_I2C(obj) \
32 OBJECT_CHECK(VersatileI2CState, (obj), TYPE_VERSATILE_I2C)
33
34 typedef struct VersatileI2CState {
35 SysBusDevice parent_obj;
36
37 MemoryRegion iomem;
38 bitbang_i2c_interface bitbang;
39 int out;
40 int in;
41 } VersatileI2CState;
42
43 static uint64_t versatile_i2c_read(void *opaque, hwaddr offset,
44 unsigned size)
45 {
46 VersatileI2CState *s = (VersatileI2CState *)opaque;
47
48 if (offset == 0) {
49 return (s->out & 1) | (s->in << 1);
50 } else {
51 qemu_log_mask(LOG_GUEST_ERROR,
52 "%s: Bad offset 0x%x\n", __func__, (int)offset);
53 return -1;
54 }
55 }
56
57 static void versatile_i2c_write(void *opaque, hwaddr offset,
58 uint64_t value, unsigned size)
59 {
60 VersatileI2CState *s = (VersatileI2CState *)opaque;
61
62 switch (offset) {
63 case 0:
64 s->out |= value & 3;
65 break;
66 case 4:
67 s->out &= ~value;
68 break;
69 default:
70 qemu_log_mask(LOG_GUEST_ERROR,
71 "%s: Bad offset 0x%x\n", __func__, (int)offset);
72 }
73 bitbang_i2c_set(&s->bitbang, BITBANG_I2C_SCL, (s->out & 1) != 0);
74 s->in = bitbang_i2c_set(&s->bitbang, BITBANG_I2C_SDA, (s->out & 2) != 0);
75 }
76
77 static const MemoryRegionOps versatile_i2c_ops = {
78 .read = versatile_i2c_read,
79 .write = versatile_i2c_write,
80 .endianness = DEVICE_NATIVE_ENDIAN,
81 };
82
83 static void versatile_i2c_init(Object *obj)
84 {
85 DeviceState *dev = DEVICE(obj);
86 VersatileI2CState *s = VERSATILE_I2C(obj);
87 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
88 I2CBus *bus;
89
90 bus = i2c_init_bus(dev, "i2c");
91 bitbang_i2c_init(&s->bitbang, bus);
92 memory_region_init_io(&s->iomem, obj, &versatile_i2c_ops, s,
93 "versatile_i2c", 0x1000);
94 sysbus_init_mmio(sbd, &s->iomem);
95 }
96
97 static const TypeInfo versatile_i2c_info = {
98 .name = TYPE_VERSATILE_I2C,
99 .parent = TYPE_SYS_BUS_DEVICE,
100 .instance_size = sizeof(VersatileI2CState),
101 .instance_init = versatile_i2c_init,
102 };
103
104 static void versatile_i2c_register_types(void)
105 {
106 type_register_static(&versatile_i2c_info);
107 }
108
109 type_init(versatile_i2c_register_types)