blob: f97e7a0c24ec4ce92d396ed519368fc7ce6e6344 [file] [log] [blame]
Isaku Yamahata04762842010-05-14 16:29:00 +09001/*
2 * QEMU PC APM controller Emulation
3 * This is split out from acpi.c
4 *
5 * Copyright (c) 2006 Fabrice Bellard
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License version 2 as published by the Free Software Foundation.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>
Paolo Bonzini6b620ca2012-01-13 17:44:23 +010018 *
19 * Contributions after 2012-01-13 are licensed under the terms of the
20 * GNU GPL, version 2 or (at your option) any later version.
Isaku Yamahata04762842010-05-14 16:29:00 +090021 */
22
Paolo Bonzini0d09e412013-02-05 17:06:20 +010023#include "hw/isa/apm.h"
Paolo Bonzini83c9f4c2013-02-04 15:40:22 +010024#include "hw/hw.h"
25#include "hw/pci/pci.h"
Isaku Yamahata04762842010-05-14 16:29:00 +090026
27//#define DEBUG
28
Isaku Yamahata019ea972010-05-14 16:29:23 +090029#ifdef DEBUG
30# define APM_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
31#else
32# define APM_DPRINTF(format, ...) do { } while (0)
33#endif
34
Isaku Yamahata04762842010-05-14 16:29:00 +090035/* fixed I/O location */
36#define APM_CNT_IOPORT 0xb2
37#define APM_STS_IOPORT 0xb3
38
Julien Grall42d8a3c2012-09-19 12:50:03 +010039static void apm_ioport_writeb(void *opaque, hwaddr addr, uint64_t val,
40 unsigned size)
Isaku Yamahata04762842010-05-14 16:29:00 +090041{
42 APMState *apm = opaque;
43 addr &= 1;
Isaku Yamahata019ea972010-05-14 16:29:23 +090044 APM_DPRINTF("apm_ioport_writeb addr=0x%x val=0x%02x\n", addr, val);
Isaku Yamahata04762842010-05-14 16:29:00 +090045 if (addr == 0) {
46 apm->apmc = val;
47
48 if (apm->callback) {
49 (apm->callback)(val, apm->arg);
50 }
51 } else {
52 apm->apms = val;
53 }
54}
55
Julien Grall42d8a3c2012-09-19 12:50:03 +010056static uint64_t apm_ioport_readb(void *opaque, hwaddr addr, unsigned size)
Isaku Yamahata04762842010-05-14 16:29:00 +090057{
58 APMState *apm = opaque;
59 uint32_t val;
60
61 addr &= 1;
62 if (addr == 0) {
63 val = apm->apmc;
64 } else {
65 val = apm->apms;
66 }
Isaku Yamahata019ea972010-05-14 16:29:23 +090067 APM_DPRINTF("apm_ioport_readb addr=0x%x val=0x%02x\n", addr, val);
Isaku Yamahata04762842010-05-14 16:29:00 +090068 return val;
69}
70
71const VMStateDescription vmstate_apm = {
72 .name = "APM State",
73 .version_id = 1,
74 .minimum_version_id = 1,
75 .minimum_version_id_old = 1,
76 .fields = (VMStateField[]) {
77 VMSTATE_UINT8(apmc, APMState),
78 VMSTATE_UINT8(apms, APMState),
79 VMSTATE_END_OF_LIST()
80 }
81};
82
Julien Grall42d8a3c2012-09-19 12:50:03 +010083static const MemoryRegionOps apm_ops = {
84 .read = apm_ioport_readb,
85 .write = apm_ioport_writeb,
86 .impl = {
87 .min_access_size = 1,
88 .max_access_size = 1,
89 },
90};
91
92void apm_init(PCIDevice *dev, APMState *apm, apm_ctrl_changed_t callback,
93 void *arg)
Isaku Yamahata04762842010-05-14 16:29:00 +090094{
95 apm->callback = callback;
96 apm->arg = arg;
97
98 /* ioport 0xb2, 0xb3 */
Paolo Bonzini1437c942013-06-06 21:25:08 -040099 memory_region_init_io(&apm->io, OBJECT(dev), &apm_ops, apm, "apm-io", 2);
Julien Grall42d8a3c2012-09-19 12:50:03 +0100100 memory_region_add_subregion(pci_address_space_io(dev), APM_CNT_IOPORT,
101 &apm->io);
Isaku Yamahata04762842010-05-14 16:29:00 +0900102}