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atkbd.c
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atkbd.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* AT and PS/2 keyboard driver
*
* Copyright (c) 1999-2002 Vojtech Pavlik
*/
/*
* This driver can handle standard AT keyboards and PS/2 keyboards in
* Translated and Raw Set 2 and Set 3, as well as AT keyboards on dumb
* input-only controllers and AT keyboards connected over a one way RS232
* converter.
*/
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/input/vivaldi-fmap.h>
#include <linux/serio.h>
#include <linux/workqueue.h>
#include <linux/libps2.h>
#include <linux/mutex.h>
#include <linux/dmi.h>
#include <linux/property.h>
#define DRIVER_DESC "AT and PS/2 keyboard driver"
MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
static int atkbd_set = 2;
module_param_named(set, atkbd_set, int, 0);
MODULE_PARM_DESC(set, "Select keyboard code set (2 = default, 3 = PS/2 native)");
#if defined(__i386__) || defined(__x86_64__) || defined(__hppa__)
static bool atkbd_reset;
#else
static bool atkbd_reset = true;
#endif
module_param_named(reset, atkbd_reset, bool, 0);
MODULE_PARM_DESC(reset, "Reset keyboard during initialization");
static bool atkbd_softrepeat;
module_param_named(softrepeat, atkbd_softrepeat, bool, 0);
MODULE_PARM_DESC(softrepeat, "Use software keyboard repeat");
static bool atkbd_softraw = true;
module_param_named(softraw, atkbd_softraw, bool, 0);
MODULE_PARM_DESC(softraw, "Use software generated rawmode");
static bool atkbd_scroll;
module_param_named(scroll, atkbd_scroll, bool, 0);
MODULE_PARM_DESC(scroll, "Enable scroll-wheel on MS Office and similar keyboards");
static bool atkbd_extra;
module_param_named(extra, atkbd_extra, bool, 0);
MODULE_PARM_DESC(extra, "Enable extra LEDs and keys on IBM RapidAcces, EzKey and similar keyboards");
static bool atkbd_terminal;
module_param_named(terminal, atkbd_terminal, bool, 0);
MODULE_PARM_DESC(terminal, "Enable break codes on an IBM Terminal keyboard connected via AT/PS2");
#define SCANCODE(keymap) ((keymap >> 16) & 0xFFFF)
#define KEYCODE(keymap) (keymap & 0xFFFF)
/*
* Scancode to keycode tables. These are just the default setting, and
* are loadable via a userland utility.
*/
#define ATKBD_KEYMAP_SIZE 512
static const unsigned short atkbd_set2_keycode[ATKBD_KEYMAP_SIZE] = {
#ifdef CONFIG_KEYBOARD_ATKBD_HP_KEYCODES
/* XXX: need a more general approach */
#include "hpps2atkbd.h" /* include the keyboard scancodes */
#else
0, 67, 65, 63, 61, 59, 60, 88, 0, 68, 66, 64, 62, 15, 41,117,
0, 56, 42, 93, 29, 16, 2, 0, 0, 0, 44, 31, 30, 17, 3, 0,
0, 46, 45, 32, 18, 5, 4, 95, 0, 57, 47, 33, 20, 19, 6,183,
0, 49, 48, 35, 34, 21, 7,184, 0, 0, 50, 36, 22, 8, 9,185,
0, 51, 37, 23, 24, 11, 10, 0, 0, 52, 53, 38, 39, 25, 12, 0,
0, 89, 40, 0, 26, 13, 0, 0, 58, 54, 28, 27, 0, 43, 0, 85,
0, 86, 91, 90, 92, 0, 14, 94, 0, 79,124, 75, 71,121, 0, 0,
82, 83, 80, 76, 77, 72, 1, 69, 87, 78, 81, 74, 55, 73, 70, 99,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
217,100,255, 0, 97,165, 0, 0,156, 0, 0, 0, 0, 0, 0,125,
173,114, 0,113, 0, 0, 0,126,128, 0, 0,140, 0, 0, 0,127,
159, 0,115, 0,164, 0, 0,116,158, 0,172,166, 0, 0, 0,142,
157, 0, 0, 0, 0, 0, 0, 0,155, 0, 98, 0, 0,163, 0, 0,
226, 0, 0, 0, 0, 0, 0, 0, 0,255, 96, 0, 0, 0,143, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0,107, 0,105,102, 0, 0,112,
110,111,108,112,106,103, 0,119, 0,118,109, 0, 99,104,119, 0,
0, 0, 0, 65, 99,
#endif
};
static const unsigned short atkbd_set3_keycode[ATKBD_KEYMAP_SIZE] = {
0, 0, 0, 0, 0, 0, 0, 59, 1,138,128,129,130, 15, 41, 60,
131, 29, 42, 86, 58, 16, 2, 61,133, 56, 44, 31, 30, 17, 3, 62,
134, 46, 45, 32, 18, 5, 4, 63,135, 57, 47, 33, 20, 19, 6, 64,
136, 49, 48, 35, 34, 21, 7, 65,137,100, 50, 36, 22, 8, 9, 66,
125, 51, 37, 23, 24, 11, 10, 67,126, 52, 53, 38, 39, 25, 12, 68,
113,114, 40, 43, 26, 13, 87, 99, 97, 54, 28, 27, 43, 43, 88, 70,
108,105,119,103,111,107, 14,110, 0, 79,106, 75, 71,109,102,104,
82, 83, 80, 76, 77, 72, 69, 98, 0, 96, 81, 0, 78, 73, 55,183,
184,185,186,187, 74, 94, 92, 93, 0, 0, 0,125,126,127,112, 0,
0,139,172,163,165,115,152,172,166,140,160,154,113,114,167,168,
148,149,147,140
};
static const unsigned short atkbd_unxlate_table[128] = {
0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88, 5, 6, 4, 12, 3,
11, 2, 10, 1, 9,119,126,108,117,125,123,107,115,116,121,105,
114,122,112,113,127, 96, 97,120, 7, 15, 23, 31, 39, 47, 55, 63,
71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
};
#define ATKBD_CMD_SETLEDS 0x10ed
#define ATKBD_CMD_GSCANSET 0x11f0
#define ATKBD_CMD_SSCANSET 0x10f0
#define ATKBD_CMD_GETID 0x02f2
#define ATKBD_CMD_SETREP 0x10f3
#define ATKBD_CMD_ENABLE 0x00f4
#define ATKBD_CMD_RESET_DIS 0x00f5 /* Reset to defaults and disable */
#define ATKBD_CMD_RESET_DEF 0x00f6 /* Reset to defaults */
#define ATKBD_CMD_SETALL_MB 0x00f8 /* Set all keys to give break codes */
#define ATKBD_CMD_SETALL_MBR 0x00fa /* ... and repeat */
#define ATKBD_CMD_RESET_BAT 0x02ff
#define ATKBD_CMD_RESEND 0x00fe
#define ATKBD_CMD_EX_ENABLE 0x10ea
#define ATKBD_CMD_EX_SETLEDS 0x20eb
#define ATKBD_CMD_OK_GETID 0x02e8
#define ATKBD_RET_ACK 0xfa
#define ATKBD_RET_NAK 0xfe
#define ATKBD_RET_BAT 0xaa
#define ATKBD_RET_EMUL0 0xe0
#define ATKBD_RET_EMUL1 0xe1
#define ATKBD_RET_RELEASE 0xf0
#define ATKBD_RET_HANJA 0xf1
#define ATKBD_RET_HANGEUL 0xf2
#define ATKBD_RET_ERR 0xff
#define ATKBD_KEY_UNKNOWN 0
#define ATKBD_KEY_NULL 255
#define ATKBD_SCR_1 0xfffe
#define ATKBD_SCR_2 0xfffd
#define ATKBD_SCR_4 0xfffc
#define ATKBD_SCR_8 0xfffb
#define ATKBD_SCR_CLICK 0xfffa
#define ATKBD_SCR_LEFT 0xfff9
#define ATKBD_SCR_RIGHT 0xfff8
#define ATKBD_SPECIAL ATKBD_SCR_RIGHT
#define ATKBD_LED_EVENT_BIT 0
#define ATKBD_REP_EVENT_BIT 1
#define ATKBD_XL_ERR 0x01
#define ATKBD_XL_BAT 0x02
#define ATKBD_XL_ACK 0x04
#define ATKBD_XL_NAK 0x08
#define ATKBD_XL_HANGEUL 0x10
#define ATKBD_XL_HANJA 0x20
static const struct {
unsigned short keycode;
unsigned char set2;
} atkbd_scroll_keys[] = {
{ ATKBD_SCR_1, 0xc5 },
{ ATKBD_SCR_2, 0x9d },
{ ATKBD_SCR_4, 0xa4 },
{ ATKBD_SCR_8, 0x9b },
{ ATKBD_SCR_CLICK, 0xe0 },
{ ATKBD_SCR_LEFT, 0xcb },
{ ATKBD_SCR_RIGHT, 0xd2 },
};
/*
* The atkbd control structure
*/
struct atkbd {
struct ps2dev ps2dev;
struct input_dev *dev;
/* Written only during init */
char name[64];
char phys[32];
unsigned short id;
unsigned short keycode[ATKBD_KEYMAP_SIZE];
DECLARE_BITMAP(force_release_mask, ATKBD_KEYMAP_SIZE);
unsigned char set;
bool translated;
bool extra;
bool write;
bool softrepeat;
bool softraw;
bool scroll;
bool enabled;
/* Accessed only from interrupt */
unsigned char emul;
bool resend;
bool release;
unsigned long xl_bit;
unsigned int last;
unsigned long time;
unsigned long err_count;
struct delayed_work event_work;
unsigned long event_jiffies;
unsigned long event_mask;
/* Serializes reconnect(), attr->set() and event work */
struct mutex mutex;
struct vivaldi_data vdata;
};
/*
* System-specific keymap fixup routine
*/
static void (*atkbd_platform_fixup)(struct atkbd *, const void *data);
static void *atkbd_platform_fixup_data;
static unsigned int (*atkbd_platform_scancode_fixup)(struct atkbd *, unsigned int);
/*
* Certain keyboards to not like ATKBD_CMD_RESET_DIS and stop responding
* to many commands until full reset (ATKBD_CMD_RESET_BAT) is performed.
*/
static bool atkbd_skip_deactivate;
static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
ssize_t (*handler)(struct atkbd *, char *));
static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
ssize_t (*handler)(struct atkbd *, const char *, size_t));
#define ATKBD_DEFINE_ATTR(_name) \
static ssize_t atkbd_show_##_name(struct atkbd *, char *); \
static ssize_t atkbd_set_##_name(struct atkbd *, const char *, size_t); \
static ssize_t atkbd_do_show_##_name(struct device *d, \
struct device_attribute *attr, char *b) \
{ \
return atkbd_attr_show_helper(d, b, atkbd_show_##_name); \
} \
static ssize_t atkbd_do_set_##_name(struct device *d, \
struct device_attribute *attr, const char *b, size_t s) \
{ \
return atkbd_attr_set_helper(d, b, s, atkbd_set_##_name); \
} \
static struct device_attribute atkbd_attr_##_name = \
__ATTR(_name, S_IWUSR | S_IRUGO, atkbd_do_show_##_name, atkbd_do_set_##_name);
ATKBD_DEFINE_ATTR(extra);
ATKBD_DEFINE_ATTR(force_release);
ATKBD_DEFINE_ATTR(scroll);
ATKBD_DEFINE_ATTR(set);
ATKBD_DEFINE_ATTR(softrepeat);
ATKBD_DEFINE_ATTR(softraw);
#define ATKBD_DEFINE_RO_ATTR(_name) \
static ssize_t atkbd_show_##_name(struct atkbd *, char *); \
static ssize_t atkbd_do_show_##_name(struct device *d, \
struct device_attribute *attr, char *b) \
{ \
return atkbd_attr_show_helper(d, b, atkbd_show_##_name); \
} \
static struct device_attribute atkbd_attr_##_name = \
__ATTR(_name, S_IRUGO, atkbd_do_show_##_name, NULL);
ATKBD_DEFINE_RO_ATTR(err_count);
ATKBD_DEFINE_RO_ATTR(function_row_physmap);
static struct attribute *atkbd_attributes[] = {
&atkbd_attr_extra.attr,
&atkbd_attr_force_release.attr,
&atkbd_attr_scroll.attr,
&atkbd_attr_set.attr,
&atkbd_attr_softrepeat.attr,
&atkbd_attr_softraw.attr,
&atkbd_attr_err_count.attr,
&atkbd_attr_function_row_physmap.attr,
NULL
};
static ssize_t atkbd_show_function_row_physmap(struct atkbd *atkbd, char *buf)
{
return vivaldi_function_row_physmap_show(&atkbd->vdata, buf);
}
static struct atkbd *atkbd_from_serio(struct serio *serio)
{
struct ps2dev *ps2dev = serio_get_drvdata(serio);
return container_of(ps2dev, struct atkbd, ps2dev);
}
static umode_t atkbd_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int i)
{
struct device *dev = kobj_to_dev(kobj);
struct serio *serio = to_serio_port(dev);
struct atkbd *atkbd = atkbd_from_serio(serio);
if (attr == &atkbd_attr_function_row_physmap.attr &&
!atkbd->vdata.num_function_row_keys)
return 0;
return attr->mode;
}
static const struct attribute_group atkbd_attribute_group = {
.attrs = atkbd_attributes,
.is_visible = atkbd_attr_is_visible,
};
__ATTRIBUTE_GROUPS(atkbd_attribute);
static const unsigned int xl_table[] = {
ATKBD_RET_BAT, ATKBD_RET_ERR, ATKBD_RET_ACK,
ATKBD_RET_NAK, ATKBD_RET_HANJA, ATKBD_RET_HANGEUL,
};
/*
* Checks if we should mangle the scancode to extract 'release' bit
* in translated mode.
*/
static bool atkbd_need_xlate(unsigned long xl_bit, unsigned char code)
{
int i;
if (code == ATKBD_RET_EMUL0 || code == ATKBD_RET_EMUL1)
return false;
for (i = 0; i < ARRAY_SIZE(xl_table); i++)
if (code == xl_table[i])
return test_bit(i, &xl_bit);
return true;
}
/*
* Calculates new value of xl_bit so the driver can distinguish
* between make/break pair of scancodes for select keys and PS/2
* protocol responses.
*/
static void atkbd_calculate_xl_bit(struct atkbd *atkbd, unsigned char code)
{
int i;
for (i = 0; i < ARRAY_SIZE(xl_table); i++) {
if (!((code ^ xl_table[i]) & 0x7f)) {
if (code & 0x80)
__clear_bit(i, &atkbd->xl_bit);
else
__set_bit(i, &atkbd->xl_bit);
break;
}
}
}
/*
* Encode the scancode, 0xe0 prefix, and high bit into a single integer,
* keeping kernel 2.4 compatibility for set 2
*/
static unsigned int atkbd_compat_scancode(struct atkbd *atkbd, unsigned int code)
{
if (atkbd->set == 3) {
if (atkbd->emul == 1)
code |= 0x100;
} else {
code = (code & 0x7f) | ((code & 0x80) << 1);
if (atkbd->emul == 1)
code |= 0x80;
}
return code;
}
/*
* Tries to handle frame or parity error by requesting the keyboard controller
* to resend the last byte. This historically not done on x86 as controllers
* there typically do not implement this command.
*/
static bool __maybe_unused atkbd_handle_frame_error(struct ps2dev *ps2dev,
u8 data, unsigned int flags)
{
struct atkbd *atkbd = container_of(ps2dev, struct atkbd, ps2dev);
struct serio *serio = ps2dev->serio;
if ((flags & (SERIO_FRAME | SERIO_PARITY)) &&
(~flags & SERIO_TIMEOUT) &&
!atkbd->resend && atkbd->write) {
dev_warn(&serio->dev, "Frame/parity error: %02x\n", flags);
serio_write(serio, ATKBD_CMD_RESEND);
atkbd->resend = true;
return true;
}
if (!flags && data == ATKBD_RET_ACK)
atkbd->resend = false;
return false;
}
static enum ps2_disposition atkbd_pre_receive_byte(struct ps2dev *ps2dev,
u8 data, unsigned int flags)
{
struct serio *serio = ps2dev->serio;
dev_dbg(&serio->dev, "Received %02x flags %02x\n", data, flags);
#if !defined(__i386__) && !defined (__x86_64__)
if (atkbd_handle_frame_error(ps2dev, data, flags))
return PS2_IGNORE;
#endif
return PS2_PROCESS;
}
static void atkbd_receive_byte(struct ps2dev *ps2dev, u8 data)
{
struct serio *serio = ps2dev->serio;
struct atkbd *atkbd = container_of(ps2dev, struct atkbd, ps2dev);
struct input_dev *dev = atkbd->dev;
unsigned int code = data;
int scroll = 0, hscroll = 0, click = -1;
int value;
unsigned short keycode;
pm_wakeup_event(&serio->dev, 0);
if (!atkbd->enabled)
return;
input_event(dev, EV_MSC, MSC_RAW, code);
if (atkbd_platform_scancode_fixup)
code = atkbd_platform_scancode_fixup(atkbd, code);
if (atkbd->translated) {
if (atkbd->emul || atkbd_need_xlate(atkbd->xl_bit, code)) {
atkbd->release = code >> 7;
code &= 0x7f;
}
if (!atkbd->emul)
atkbd_calculate_xl_bit(atkbd, data);
}
switch (code) {
case ATKBD_RET_BAT:
atkbd->enabled = false;
serio_reconnect(atkbd->ps2dev.serio);
return;
case ATKBD_RET_EMUL0:
atkbd->emul = 1;
return;
case ATKBD_RET_EMUL1:
atkbd->emul = 2;
return;
case ATKBD_RET_RELEASE:
atkbd->release = true;
return;
case ATKBD_RET_ACK:
case ATKBD_RET_NAK:
if (printk_ratelimit())
dev_warn(&serio->dev,
"Spurious %s on %s. "
"Some program might be trying to access hardware directly.\n",
data == ATKBD_RET_ACK ? "ACK" : "NAK", serio->phys);
return;
case ATKBD_RET_ERR:
atkbd->err_count++;
dev_dbg(&serio->dev, "Keyboard on %s reports too many keys pressed.\n",
serio->phys);
return;
}
code = atkbd_compat_scancode(atkbd, code);
if (atkbd->emul && --atkbd->emul)
return;
keycode = atkbd->keycode[code];
if (!(atkbd->release && test_bit(code, atkbd->force_release_mask)))
if (keycode != ATKBD_KEY_NULL)
input_event(dev, EV_MSC, MSC_SCAN, code);
switch (keycode) {
case ATKBD_KEY_NULL:
break;
case ATKBD_KEY_UNKNOWN:
dev_warn(&serio->dev,
"Unknown key %s (%s set %d, code %#x on %s).\n",
atkbd->release ? "released" : "pressed",
atkbd->translated ? "translated" : "raw",
atkbd->set, code, serio->phys);
dev_warn(&serio->dev,
"Use 'setkeycodes %s%02x <keycode>' to make it known.\n",
code & 0x80 ? "e0" : "", code & 0x7f);
input_sync(dev);
break;
case ATKBD_SCR_1:
scroll = 1;
break;
case ATKBD_SCR_2:
scroll = 2;
break;
case ATKBD_SCR_4:
scroll = 4;
break;
case ATKBD_SCR_8:
scroll = 8;
break;
case ATKBD_SCR_CLICK:
click = !atkbd->release;
break;
case ATKBD_SCR_LEFT:
hscroll = -1;
break;
case ATKBD_SCR_RIGHT:
hscroll = 1;
break;
default:
if (atkbd->release) {
value = 0;
atkbd->last = 0;
} else if (!atkbd->softrepeat && test_bit(keycode, dev->key)) {
/* Workaround Toshiba laptop multiple keypress */
value = time_before(jiffies, atkbd->time) && atkbd->last == code ? 1 : 2;
} else {
value = 1;
atkbd->last = code;
atkbd->time = jiffies + msecs_to_jiffies(dev->rep[REP_DELAY]) / 2;
}
input_event(dev, EV_KEY, keycode, value);
input_sync(dev);
if (value && test_bit(code, atkbd->force_release_mask)) {
input_event(dev, EV_MSC, MSC_SCAN, code);
input_report_key(dev, keycode, 0);
input_sync(dev);
}
}
if (atkbd->scroll) {
if (click != -1)
input_report_key(dev, BTN_MIDDLE, click);
input_report_rel(dev, REL_WHEEL,
atkbd->release ? -scroll : scroll);
input_report_rel(dev, REL_HWHEEL, hscroll);
input_sync(dev);
}
atkbd->release = false;
}
static int atkbd_set_repeat_rate(struct atkbd *atkbd)
{
const short period[32] =
{ 33, 37, 42, 46, 50, 54, 58, 63, 67, 75, 83, 92, 100, 109, 116, 125,
133, 149, 167, 182, 200, 217, 232, 250, 270, 303, 333, 370, 400, 435, 470, 500 };
const short delay[4] =
{ 250, 500, 750, 1000 };
struct input_dev *dev = atkbd->dev;
unsigned char param;
int i = 0, j = 0;
while (i < ARRAY_SIZE(period) - 1 && period[i] < dev->rep[REP_PERIOD])
i++;
dev->rep[REP_PERIOD] = period[i];
while (j < ARRAY_SIZE(delay) - 1 && delay[j] < dev->rep[REP_DELAY])
j++;
dev->rep[REP_DELAY] = delay[j];
param = i | (j << 5);
return ps2_command(&atkbd->ps2dev, ¶m, ATKBD_CMD_SETREP);
}
static int atkbd_set_leds(struct atkbd *atkbd)
{
struct input_dev *dev = atkbd->dev;
unsigned char param[2];
param[0] = (test_bit(LED_SCROLLL, dev->led) ? 1 : 0)
| (test_bit(LED_NUML, dev->led) ? 2 : 0)
| (test_bit(LED_CAPSL, dev->led) ? 4 : 0);
if (ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_SETLEDS))
return -1;
if (atkbd->extra) {
param[0] = 0;
param[1] = (test_bit(LED_COMPOSE, dev->led) ? 0x01 : 0)
| (test_bit(LED_SLEEP, dev->led) ? 0x02 : 0)
| (test_bit(LED_SUSPEND, dev->led) ? 0x04 : 0)
| (test_bit(LED_MISC, dev->led) ? 0x10 : 0)
| (test_bit(LED_MUTE, dev->led) ? 0x20 : 0);
if (ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_EX_SETLEDS))
return -1;
}
return 0;
}
/*
* atkbd_event_work() is used to complete processing of events that
* can not be processed by input_event() which is often called from
* interrupt context.
*/
static void atkbd_event_work(struct work_struct *work)
{
struct atkbd *atkbd = container_of(work, struct atkbd, event_work.work);
mutex_lock(&atkbd->mutex);
if (!atkbd->enabled) {
/*
* Serio ports are resumed asynchronously so while driver core
* thinks that device is already fully operational in reality
* it may not be ready yet. In this case we need to keep
* rescheduling till reconnect completes.
*/
schedule_delayed_work(&atkbd->event_work,
msecs_to_jiffies(100));
} else {
if (test_and_clear_bit(ATKBD_LED_EVENT_BIT, &atkbd->event_mask))
atkbd_set_leds(atkbd);
if (test_and_clear_bit(ATKBD_REP_EVENT_BIT, &atkbd->event_mask))
atkbd_set_repeat_rate(atkbd);
}
mutex_unlock(&atkbd->mutex);
}
/*
* Schedule switch for execution. We need to throttle requests,
* otherwise keyboard may become unresponsive.
*/
static void atkbd_schedule_event_work(struct atkbd *atkbd, int event_bit)
{
unsigned long delay = msecs_to_jiffies(50);
if (time_after(jiffies, atkbd->event_jiffies + delay))
delay = 0;
atkbd->event_jiffies = jiffies;
set_bit(event_bit, &atkbd->event_mask);
mb();
schedule_delayed_work(&atkbd->event_work, delay);
}
/*
* Event callback from the input module. Events that change the state of
* the hardware are processed here. If action can not be performed in
* interrupt context it is offloaded to atkbd_event_work.
*/
static int atkbd_event(struct input_dev *dev,
unsigned int type, unsigned int code, int value)
{
struct atkbd *atkbd = input_get_drvdata(dev);
if (!atkbd->write)
return -1;
switch (type) {
case EV_LED:
atkbd_schedule_event_work(atkbd, ATKBD_LED_EVENT_BIT);
return 0;
case EV_REP:
if (!atkbd->softrepeat)
atkbd_schedule_event_work(atkbd, ATKBD_REP_EVENT_BIT);
return 0;
default:
return -1;
}
}
/*
* atkbd_enable() signals that interrupt handler is allowed to
* generate input events.
*/
static inline void atkbd_enable(struct atkbd *atkbd)
{
serio_pause_rx(atkbd->ps2dev.serio);
atkbd->enabled = true;
serio_continue_rx(atkbd->ps2dev.serio);
}
/*
* atkbd_disable() tells input handler that all incoming data except
* for ACKs and command response should be dropped.
*/
static inline void atkbd_disable(struct atkbd *atkbd)
{
serio_pause_rx(atkbd->ps2dev.serio);
atkbd->enabled = false;
serio_continue_rx(atkbd->ps2dev.serio);
}
static int atkbd_activate(struct atkbd *atkbd)
{
struct ps2dev *ps2dev = &atkbd->ps2dev;
/*
* Enable the keyboard to receive keystrokes.
*/
if (ps2_command(ps2dev, NULL, ATKBD_CMD_ENABLE)) {
dev_err(&ps2dev->serio->dev,
"Failed to enable keyboard on %s\n",
ps2dev->serio->phys);
return -1;
}
return 0;
}
/*
* atkbd_deactivate() resets and disables the keyboard from sending
* keystrokes.
*/
static void atkbd_deactivate(struct atkbd *atkbd)
{
struct ps2dev *ps2dev = &atkbd->ps2dev;
if (ps2_command(ps2dev, NULL, ATKBD_CMD_RESET_DIS))
dev_err(&ps2dev->serio->dev,
"Failed to deactivate keyboard on %s\n",
ps2dev->serio->phys);
}
#ifdef CONFIG_X86
static bool atkbd_is_portable_device(void)
{
static const char * const chassis_types[] = {
"8", /* Portable */
"9", /* Laptop */
"10", /* Notebook */
"14", /* Sub-Notebook */
"31", /* Convertible */
"32", /* Detachable */
};
int i;
for (i = 0; i < ARRAY_SIZE(chassis_types); i++)
if (dmi_match(DMI_CHASSIS_TYPE, chassis_types[i]))
return true;
return false;
}
/*
* On many modern laptops ATKBD_CMD_GETID may cause problems, on these laptops
* the controller is always in translated mode. In this mode mice/touchpads will
* not work. So in this case simply assume a keyboard is connected to avoid
* confusing some laptop keyboards.
*
* Skipping ATKBD_CMD_GETID ends up using a fake keyboard id. Using a fake id is
* ok in translated mode, only atkbd_select_set() checks atkbd->id and in
* translated mode that is a no-op.
*/
static bool atkbd_skip_getid(struct atkbd *atkbd)
{
return atkbd->translated && atkbd_is_portable_device();
}
#else
static inline bool atkbd_skip_getid(struct atkbd *atkbd) { return false; }
#endif
/*
* atkbd_probe() probes for an AT keyboard on a serio port.
*/
static int atkbd_probe(struct atkbd *atkbd)
{
struct ps2dev *ps2dev = &atkbd->ps2dev;
unsigned char param[2];
/*
* Some systems, where the bit-twiddling when testing the io-lines of the
* controller may confuse the keyboard need a full reset of the keyboard. On
* these systems the BIOS also usually doesn't do it for us.
*/
if (atkbd_reset)
if (ps2_command(ps2dev, NULL, ATKBD_CMD_RESET_BAT))
dev_warn(&ps2dev->serio->dev,
"keyboard reset failed on %s\n",
ps2dev->serio->phys);
/*
* Then we check the keyboard ID. We should get 0xab83 under normal conditions.
* Some keyboards report different values, but the first byte is always 0xab or
* 0xac. Some old AT keyboards don't report anything. If a mouse is connected, this
* should make sure we don't try to set the LEDs on it.
*/
param[0] = param[1] = 0xa5; /* initialize with invalid values */
if (atkbd_skip_getid(atkbd) || ps2_command(ps2dev, param, ATKBD_CMD_GETID)) {
/*
* If the get ID command was skipped or failed, we check if we can at least set
* the LEDs on the keyboard. This should work on every keyboard out there.
* It also turns the LEDs off, which we want anyway.
*/
param[0] = 0;
if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
return -1;
atkbd->id = 0xabba;
return 0;
}
if (!ps2_is_keyboard_id(param[0]))
return -1;
atkbd->id = (param[0] << 8) | param[1];
if (atkbd->id == 0xaca1 && atkbd->translated) {
dev_err(&ps2dev->serio->dev,
"NCD terminal keyboards are only supported on non-translating controllers. "
"Use i8042.direct=1 to disable translation.\n");
return -1;
}
/*
* Make sure nothing is coming from the keyboard and disturbs our
* internal state.
*/
if (!atkbd_skip_deactivate)
atkbd_deactivate(atkbd);
return 0;
}
/*
* atkbd_select_set checks if a keyboard has a working Set 3 support, and
* sets it into that. Unfortunately there are keyboards that can be switched
* to Set 3, but don't work well in that (BTC Multimedia ...)
*/
static int atkbd_select_set(struct atkbd *atkbd, int target_set, int allow_extra)
{
struct ps2dev *ps2dev = &atkbd->ps2dev;
unsigned char param[2];
atkbd->extra = false;
/*
* For known special keyboards we can go ahead and set the correct set.
* We check for NCD PS/2 Sun, NorthGate OmniKey 101 and
* IBM RapidAccess / IBM EzButton / Chicony KBP-8993 keyboards.
*/
if (atkbd->translated)
return 2;
if (atkbd->id == 0xaca1) {
param[0] = 3;
ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET);
return 3;
}
if (allow_extra) {
param[0] = 0x71;
if (!ps2_command(ps2dev, param, ATKBD_CMD_EX_ENABLE)) {
atkbd->extra = true;
return 2;
}
}
if (atkbd_terminal) {
ps2_command(ps2dev, param, ATKBD_CMD_SETALL_MB);
return 3;
}
if (target_set != 3)
return 2;
if (!ps2_command(ps2dev, param, ATKBD_CMD_OK_GETID)) {
atkbd->id = param[0] << 8 | param[1];
return 2;
}
param[0] = 3;
if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
return 2;
param[0] = 0;
if (ps2_command(ps2dev, param, ATKBD_CMD_GSCANSET))
return 2;
if (param[0] != 3) {
param[0] = 2;
if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
return 2;
}
ps2_command(ps2dev, param, ATKBD_CMD_SETALL_MBR);
return 3;
}
static int atkbd_reset_state(struct atkbd *atkbd)
{
struct ps2dev *ps2dev = &atkbd->ps2dev;
unsigned char param[1];
/*
* Set the LEDs to a predefined state (all off).
*/
param[0] = 0;
if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
return -1;
/*
* Set autorepeat to fastest possible.
*/
param[0] = 0;
if (ps2_command(ps2dev, param, ATKBD_CMD_SETREP))
return -1;
return 0;
}
/*
* atkbd_cleanup() restores the keyboard state so that BIOS is happy after a
* reboot.
*/
static void atkbd_cleanup(struct serio *serio)
{
struct atkbd *atkbd = atkbd_from_serio(serio);
atkbd_disable(atkbd);
ps2_command(&atkbd->ps2dev, NULL, ATKBD_CMD_RESET_DEF);
}
/*
* atkbd_disconnect() closes and frees.
*/
static void atkbd_disconnect(struct serio *serio)
{
struct atkbd *atkbd = atkbd_from_serio(serio);
atkbd_disable(atkbd);
input_unregister_device(atkbd->dev);
/*
* Make sure we don't have a command in flight.
* Note that since atkbd->enabled is false event work will keep
* rescheduling itself until it gets canceled and will not try
* accessing freed input device or serio port.
*/
cancel_delayed_work_sync(&atkbd->event_work);
serio_close(serio);
serio_set_drvdata(serio, NULL);
kfree(atkbd);
}