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
|
/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <arch/io.h>
#include <console/console.h>
#include <delay.h>
#include <device/device.h>
#include <device/pnp.h>
#include <pc80/keyboard.h>
#include "ec.h"
#include "chip.h"
/* helper functions from drivers/pc80/keyboard.c */
static int input_buffer_empty(u16 status_reg)
{
u32 timeout;
for (timeout = KBC_TIMEOUT_IN_MS; timeout && (inb(status_reg) & KBD_IBF);
timeout--) {
udelay(1000);
}
if (!timeout) {
printk(BIOS_WARNING, "EC-IT8518 Unexpected input buffer full\n");
printk(BIOS_WARNING, " Status (0x%x): 0x%x\n", status_reg, inb(status_reg));
}
return !!timeout;
}
static int output_buffer_full(u16 status_reg)
{
u32 timeout;
for (timeout = KBC_TIMEOUT_IN_MS; timeout && ((inb(status_reg)
& KBD_OBF) == 0); timeout--) {
udelay(1000);
}
if (!timeout) {
printk(BIOS_INFO, "EC-IT8518 output buffer result timeout\n");
printk(BIOS_INFO, " Status (0x%x): 0x%x\n", status_reg, inb(status_reg));
}
return !!timeout;
}
/* The IT8518 60/64 EC registers are the same command/status IB/OB KBC pair.
* Check status from 64 port before each command.
*
* Ex. Get panel ID command C43/D77
* Check IBF empty. Then Write 0x43(CMD) to 0x64 Port
* Check IBF empty. Then Write 0x77(DATA) to 0x60 Port
* Check OBF set. Then Get Data(0x03:panel ID) from 0x60
* Different commands return may or may not respond and may have multiple
* bytes. Keep it simple for nor
*/
u8 ec_kbc_read_ob(void)
{
if (!output_buffer_full(KBD_STATUS)) return 0;
return inb(KBD_DATA);
}
void ec_kbc_write_cmd(u8 cmd)
{
if (!input_buffer_empty(KBD_STATUS)) return;
outb(cmd, KBD_COMMAND);
}
void ec_kbc_write_ib(u8 data)
{
if (!input_buffer_empty(KBD_STATUS)) return;
outb(data, KBD_DATA);
}
/*
* These functions are for accessing the IT8518 device RAM space via 0x66/0x68
*/
u8 ec_read_ob(void)
{
if (!output_buffer_full(EC_SC)) return 0;
return inb(EC_DATA);
}
void ec_write_cmd(u8 cmd)
{
if (!input_buffer_empty(EC_SC)) return;
outb(cmd, EC_SC);
}
void ec_write_ib(u8 data)
{
if (!input_buffer_empty(EC_SC)) return;
outb(data, EC_DATA);
}
u8 ec_read(u16 addr)
{
ec_write_cmd(RD_EC);
ec_write_ib(addr);
return ec_read_ob();
}
void ec_write(u16 addr, u8 data)
{
ec_write_cmd(WR_EC);
ec_write_ib(addr);
ec_write_ib(data);
}
u8 ec_it8518_get_event(void)
{
u8 cmd = 0;
u8 status = inb(EC_SC);
if (status & SCI_EVT) {
ec_write_cmd(QR_EC);
cmd = ec_read_ob();
} else if (status & SMI_EVT) {
ec_kbc_write_cmd(EC_KBD_SMI_EVENT);
cmd = ec_kbc_read_ob();
}
return cmd;
}
void ec_it8518_enable_wake_events(void)
{
/*
* Set the bit in ECRAM that will enable the Lid switch as a wake source
*/
u8 reg8 = ec_read(EC_WAKE_SRC_ENABLE);
ec_write(EC_WAKE_SRC_ENABLE, reg8 | EC_LID_WAKE_ENABLE);
}
static void it8518_init(struct device *dev)
{
if (!dev->enabled)
return;
printk(BIOS_DEBUG, "Quanta IT8518: Initializing keyboard.\n");
pc_keyboard_init(NO_AUX_DEVICE);
}
static struct device_operations ops = {
.init = it8518_init,
.read_resources = noop_read_resources,
.set_resources = noop_set_resources,
};
static struct pnp_info pnp_dev_info[] = {
{ NULL, 0, 0, 0, }
};
static void enable_dev(struct device *dev)
{
pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info);
}
struct chip_operations ec_quanta_it8518_ops = {
CHIP_NAME("QUANTA IT8518 EC")
.enable_dev = enable_dev
};
|
