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
|
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2012 The Chromium OS Authors. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of
* the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __PRE_RAM__
#include <console/console.h>
#include <device/device.h>
#include <device/pnp.h>
#include <arch/io.h>
#include <delay.h>
#include <pc80/keyboard.h>
#include "ec.h"
#include "chip.h"
/* kbc helper functions from drivers/pc80/keyboard.c. TODO: share functions. */
static int kbc_input_buffer_empty(void)
{
u32 timeout;
for (timeout = KBC_TIMEOUT_IN_MS; timeout && (inb(KBD_STATUS) & KBD_IBF);
timeout--) {
mdelay(1);
}
if (!timeout) {
printk(BIOS_WARNING,
"Unexpected Keyboard controller input buffer full\n");
}
return !!timeout;
}
static int kbc_output_buffer_full(void)
{
u32 timeout;
for (timeout = KBC_TIMEOUT_IN_MS; timeout && ((inb(KBD_STATUS)
& KBD_OBF) == 0); timeout--) {
mdelay(1);
}
if (!timeout) {
printk(BIOS_INFO, "Keyboard controller output buffer result timeout\n");
}
return !!timeout;
}
int kbc_cleanup_buffers(void)
{
u32 timeout;
for (timeout = KBC_TIMEOUT_IN_MS; timeout && (inb(KBD_STATUS)
& (KBD_OBF | KBD_IBF)); timeout--) {
mdelay(1);
inb(KBD_DATA);
}
if (!timeout) {
printk(BIOS_ERR, "Couldn't cleanup the keyboard controller buffers\n");
printk(BIOS_ERR, "Status (0x%x): 0x%x, Buffer (0x%x): 0x%x\n",
KBD_STATUS, inb(KBD_STATUS), KBD_DATA, inb(KBD_DATA));
}
return !!timeout;
}
/* The ENE 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 (!kbc_output_buffer_full()) return 0;
return inb(KBD_DATA);
}
void ec_kbc_write_cmd(u8 cmd)
{
if (!kbc_input_buffer_empty()) return;
outb(cmd, KBD_COMMAND);
}
void ec_kbc_write_ib(u8 data)
{
if (!kbc_input_buffer_empty()) return;
outb(data, KBD_DATA);
}
/*
* These functions are for accessing the ENE932 device space, but are not
* currently used.
*/
/*
static u8 ec_io_read(u16 addr)
{
outb(addr >> 8, EC_IO_HIGH);
outb(addr & 0xff, EC_IO_LOW);
return inb(EC_IO_DATA);
}
*/
/*static void ec_write(u16 addr, u8 data)
{
outb(addr >> 8, EC_IO_HIGH);
outb(addr & 0xff, EC_IO_LOW;
outb(data, EC_IO_DATA);
}
*/
#ifndef __SMM__
static void ene932_init(struct device *dev)
{
if (!dev->enabled)
return;
printk(BIOS_DEBUG, "Compal ENE932: Initializing keyboard.\n");
pc_keyboard_init(NO_AUX_DEVICE);
}
static struct device_operations ops = {
.init = ene932_init,
.read_resources = DEVICE_NOOP,
.enable_resources = DEVICE_NOOP,
};
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_compal_ene932_ops = {
CHIP_NAME("COMPAL ENE932 EC")
.enable_dev = enable_dev
};
#endif /* ! __SMM__ */
#endif /* ! __PRE_RAM__ */
|
