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linux/drivers/input/keyboard/lkkbd.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

770 lines
19 KiB
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/*
* Copyright (C) 2004 by Jan-Benedict Glaw <jbglaw@lug-owl.de>
*/
/*
* LK keyboard driver for Linux, based on sunkbd.c (C) by Vojtech Pavlik
*/
/*
* DEC LK201 and LK401 keyboard driver for Linux (primary for DECstations
* and VAXstations, but can also be used on any standard RS232 with an
* adaptor).
*
* DISCLAIMER: This works for _me_. If you break anything by using the
* information given below, I will _not_ be liable!
*
* RJ10 pinout: To DE9: Or DB25:
* 1 - RxD <----> Pin 3 (TxD) <-> Pin 2 (TxD)
* 2 - GND <----> Pin 5 (GND) <-> Pin 7 (GND)
* 4 - TxD <----> Pin 2 (RxD) <-> Pin 3 (RxD)
* 3 - +12V (from HDD drive connector), DON'T connect to DE9 or DB25!!!
*
* Pin numbers for DE9 and DB25 are noted on the plug (quite small:). For
* RJ10, it's like this:
*
* __=__ Hold the plug in front of you, cable downwards,
* /___/| nose is hidden behind the plug. Now, pin 1 is at
* |1234|| the left side, pin 4 at the right and 2 and 3 are
* |IIII|| in between, of course:)
* | ||
* |____|/
* || So the adaptor consists of three connected cables
* || for data transmission (RxD and TxD) and signal ground.
* Additionally, you have to get +12V from somewhere.
* Most easily, you'll get that from a floppy or HDD power connector.
* It's the yellow cable there (black is ground and red is +5V).
*
* The keyboard and all the commands it understands are documented in
* "VCB02 Video Subsystem - Technical Manual", EK-104AA-TM-001. This
* document is LK201 specific, but LK401 is mostly compatible. It comes
* up in LK201 mode and doesn't report any of the additional keys it
* has. These need to be switched on with the LK_CMD_ENABLE_LK401
* command. You'll find this document (scanned .pdf file) on MANX,
* a search engine specific to DEC documentation. Try
* http://www.vt100.net/manx/details?pn=EK-104AA-TM-001;id=21;cp=1
*/
/*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Should you need to contact me, the author, you can do so either by
* email or by paper mail:
* Jan-Benedict Glaw, Lilienstra<72>e 16, 33790 H<>rste (near Halle/Westf.),
* Germany.
*/
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/workqueue.h>
#define DRIVER_DESC "LK keyboard driver"
MODULE_AUTHOR ("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
MODULE_DESCRIPTION (DRIVER_DESC);
MODULE_LICENSE ("GPL");
/*
* Known parameters:
* bell_volume
* keyclick_volume
* ctrlclick_volume
*
* Please notice that there's not yet an API to set these at runtime.
*/
static int bell_volume = 100; /* % */
module_param (bell_volume, int, 0);
MODULE_PARM_DESC (bell_volume, "Bell volume (in %). default is 100%");
static int keyclick_volume = 100; /* % */
module_param (keyclick_volume, int, 0);
MODULE_PARM_DESC (keyclick_volume, "Keyclick volume (in %), default is 100%");
static int ctrlclick_volume = 100; /* % */
module_param (ctrlclick_volume, int, 0);
MODULE_PARM_DESC (ctrlclick_volume, "Ctrlclick volume (in %), default is 100%");
static int lk201_compose_is_alt;
module_param (lk201_compose_is_alt, int, 0);
MODULE_PARM_DESC (lk201_compose_is_alt, "If set non-zero, LK201' Compose key "
"will act as an Alt key");
#undef LKKBD_DEBUG
#ifdef LKKBD_DEBUG
#define DBG(x...) printk (x)
#else
#define DBG(x...) do {} while (0)
#endif
/* LED control */
#define LK_LED_WAIT 0x81
#define LK_LED_COMPOSE 0x82
#define LK_LED_SHIFTLOCK 0x84
#define LK_LED_SCROLLLOCK 0x88
#define LK_CMD_LED_ON 0x13
#define LK_CMD_LED_OFF 0x11
/* Mode control */
#define LK_MODE_DOWN 0x80
#define LK_MODE_AUTODOWN 0x82
#define LK_MODE_UPDOWN 0x86
#define LK_CMD_SET_MODE(mode,div) ((mode) | ((div) << 3))
/* Misc commands */
#define LK_CMD_ENABLE_KEYCLICK 0x1b
#define LK_CMD_DISABLE_KEYCLICK 0x99
#define LK_CMD_DISABLE_BELL 0xa1
#define LK_CMD_SOUND_BELL 0xa7
#define LK_CMD_ENABLE_BELL 0x23
#define LK_CMD_DISABLE_CTRCLICK 0xb9
#define LK_CMD_ENABLE_CTRCLICK 0xbb
#define LK_CMD_SET_DEFAULTS 0xd3
#define LK_CMD_POWERCYCLE_RESET 0xfd
#define LK_CMD_ENABLE_LK401 0xe9
#define LK_CMD_REQUEST_ID 0xab
/* Misc responses from keyboard */
#define LK_STUCK_KEY 0x3d
#define LK_SELFTEST_FAILED 0x3e
#define LK_ALL_KEYS_UP 0xb3
#define LK_METRONOME 0xb4
#define LK_OUTPUT_ERROR 0xb5
#define LK_INPUT_ERROR 0xb6
#define LK_KBD_LOCKED 0xb7
#define LK_KBD_TEST_MODE_ACK 0xb8
#define LK_PREFIX_KEY_DOWN 0xb9
#define LK_MODE_CHANGE_ACK 0xba
#define LK_RESPONSE_RESERVED 0xbb
#define LK_NUM_KEYCODES 256
#define LK_NUM_IGNORE_BYTES 6
typedef u_int16_t lk_keycode_t;
static lk_keycode_t lkkbd_keycode[LK_NUM_KEYCODES] = {
[0x56] = KEY_F1,
[0x57] = KEY_F2,
[0x58] = KEY_F3,
[0x59] = KEY_F4,
[0x5a] = KEY_F5,
[0x64] = KEY_F6,
[0x65] = KEY_F7,
[0x66] = KEY_F8,
[0x67] = KEY_F9,
[0x68] = KEY_F10,
[0x71] = KEY_F11,
[0x72] = KEY_F12,
[0x73] = KEY_F13,
[0x74] = KEY_F14,
[0x7c] = KEY_F15,
[0x7d] = KEY_F16,
[0x80] = KEY_F17,
[0x81] = KEY_F18,
[0x82] = KEY_F19,
[0x83] = KEY_F20,
[0x8a] = KEY_FIND,
[0x8b] = KEY_INSERT,
[0x8c] = KEY_DELETE,
[0x8d] = KEY_SELECT,
[0x8e] = KEY_PAGEUP,
[0x8f] = KEY_PAGEDOWN,
[0x92] = KEY_KP0,
[0x94] = KEY_KPDOT,
[0x95] = KEY_KPENTER,
[0x96] = KEY_KP1,
[0x97] = KEY_KP2,
[0x98] = KEY_KP3,
[0x99] = KEY_KP4,
[0x9a] = KEY_KP5,
[0x9b] = KEY_KP6,
[0x9c] = KEY_KPCOMMA,
[0x9d] = KEY_KP7,
[0x9e] = KEY_KP8,
[0x9f] = KEY_KP9,
[0xa0] = KEY_KPMINUS,
[0xa1] = KEY_PROG1,
[0xa2] = KEY_PROG2,
[0xa3] = KEY_PROG3,
[0xa4] = KEY_PROG4,
[0xa7] = KEY_LEFT,
[0xa8] = KEY_RIGHT,
[0xa9] = KEY_DOWN,
[0xaa] = KEY_UP,
[0xab] = KEY_RIGHTSHIFT,
[0xac] = KEY_LEFTALT,
[0xad] = KEY_COMPOSE, /* Right Compose, that is. */
[0xae] = KEY_LEFTSHIFT, /* Same as KEY_RIGHTSHIFT on LK201 */
[0xaf] = KEY_LEFTCTRL,
[0xb0] = KEY_CAPSLOCK,
[0xb1] = KEY_COMPOSE, /* Left Compose, that is. */
[0xb2] = KEY_RIGHTALT,
[0xbc] = KEY_BACKSPACE,
[0xbd] = KEY_ENTER,
[0xbe] = KEY_TAB,
[0xbf] = KEY_ESC,
[0xc0] = KEY_1,
[0xc1] = KEY_Q,
[0xc2] = KEY_A,
[0xc3] = KEY_Z,
[0xc5] = KEY_2,
[0xc6] = KEY_W,
[0xc7] = KEY_S,
[0xc8] = KEY_X,
[0xc9] = KEY_102ND,
[0xcb] = KEY_3,
[0xcc] = KEY_E,
[0xcd] = KEY_D,
[0xce] = KEY_C,
[0xd0] = KEY_4,
[0xd1] = KEY_R,
[0xd2] = KEY_F,
[0xd3] = KEY_V,
[0xd4] = KEY_SPACE,
[0xd6] = KEY_5,
[0xd7] = KEY_T,
[0xd8] = KEY_G,
[0xd9] = KEY_B,
[0xdb] = KEY_6,
[0xdc] = KEY_Y,
[0xdd] = KEY_H,
[0xde] = KEY_N,
[0xe0] = KEY_7,
[0xe1] = KEY_U,
[0xe2] = KEY_J,
[0xe3] = KEY_M,
[0xe5] = KEY_8,
[0xe6] = KEY_I,
[0xe7] = KEY_K,
[0xe8] = KEY_COMMA,
[0xea] = KEY_9,
[0xeb] = KEY_O,
[0xec] = KEY_L,
[0xed] = KEY_DOT,
[0xef] = KEY_0,
[0xf0] = KEY_P,
[0xf2] = KEY_SEMICOLON,
[0xf3] = KEY_SLASH,
[0xf5] = KEY_EQUAL,
[0xf6] = KEY_RIGHTBRACE,
[0xf7] = KEY_BACKSLASH,
[0xf9] = KEY_MINUS,
[0xfa] = KEY_LEFTBRACE,
[0xfb] = KEY_APOSTROPHE,
};
#define CHECK_LED(LK, VAR_ON, VAR_OFF, LED, BITS) do { \
if (test_bit (LED, (LK)->dev->led)) \
VAR_ON |= BITS; \
else \
VAR_OFF |= BITS; \
} while (0)
/*
* Per-keyboard data
*/
struct lkkbd {
lk_keycode_t keycode[LK_NUM_KEYCODES];
int ignore_bytes;
unsigned char id[LK_NUM_IGNORE_BYTES];
struct input_dev *dev;
struct serio *serio;
struct work_struct tq;
char name[64];
char phys[32];
char type;
int bell_volume;
int keyclick_volume;
int ctrlclick_volume;
};
#ifdef LKKBD_DEBUG
/*
* Responses from the keyboard and mapping back to their names.
*/
static struct {
unsigned char value;
unsigned char *name;
} lk_response[] = {
#define RESPONSE(x) { .value = (x), .name = #x, }
RESPONSE (LK_STUCK_KEY),
RESPONSE (LK_SELFTEST_FAILED),
RESPONSE (LK_ALL_KEYS_UP),
RESPONSE (LK_METRONOME),
RESPONSE (LK_OUTPUT_ERROR),
RESPONSE (LK_INPUT_ERROR),
RESPONSE (LK_KBD_LOCKED),
RESPONSE (LK_KBD_TEST_MODE_ACK),
RESPONSE (LK_PREFIX_KEY_DOWN),
RESPONSE (LK_MODE_CHANGE_ACK),
RESPONSE (LK_RESPONSE_RESERVED),
#undef RESPONSE
};
static unsigned char *
response_name (unsigned char value)
{
int i;
for (i = 0; i < ARRAY_SIZE (lk_response); i++)
if (lk_response[i].value == value)
return lk_response[i].name;
return "<unknown>";
}
#endif /* LKKBD_DEBUG */
/*
* Calculate volume parameter byte for a given volume.
*/
static unsigned char
volume_to_hw (int volume_percent)
{
unsigned char ret = 0;
if (volume_percent < 0)
volume_percent = 0;
if (volume_percent > 100)
volume_percent = 100;
if (volume_percent >= 0)
ret = 7;
if (volume_percent >= 13) /* 12.5 */
ret = 6;
if (volume_percent >= 25)
ret = 5;
if (volume_percent >= 38) /* 37.5 */
ret = 4;
if (volume_percent >= 50)
ret = 3;
if (volume_percent >= 63) /* 62.5 */
ret = 2; /* This is the default volume */
if (volume_percent >= 75)
ret = 1;
if (volume_percent >= 88) /* 87.5 */
ret = 0;
ret |= 0x80;
return ret;
}
static void
lkkbd_detection_done (struct lkkbd *lk)
{
int i;
/*
* Reset setting for Compose key. Let Compose be KEY_COMPOSE.
*/
lk->keycode[0xb1] = KEY_COMPOSE;
/*
* Print keyboard name and modify Compose=Alt on user's request.
*/
switch (lk->id[4]) {
case 1:
strlcpy (lk->name, "DEC LK201 keyboard",
sizeof (lk->name));
if (lk201_compose_is_alt)
lk->keycode[0xb1] = KEY_LEFTALT;
break;
case 2:
strlcpy (lk->name, "DEC LK401 keyboard",
sizeof (lk->name));
break;
default:
strlcpy (lk->name, "Unknown DEC keyboard",
sizeof (lk->name));
printk (KERN_ERR "lkkbd: keyboard on %s is unknown, "
"please report to Jan-Benedict Glaw "
"<jbglaw@lug-owl.de>\n", lk->phys);
printk (KERN_ERR "lkkbd: keyboard ID'ed as:");
for (i = 0; i < LK_NUM_IGNORE_BYTES; i++)
printk (" 0x%02x", lk->id[i]);
printk ("\n");
break;
}
printk (KERN_INFO "lkkbd: keyboard on %s identified as: %s\n",
lk->phys, lk->name);
/*
* Report errors during keyboard boot-up.
*/
switch (lk->id[2]) {
case 0x00:
/* All okay */
break;
case LK_STUCK_KEY:
printk (KERN_ERR "lkkbd: Stuck key on keyboard at "
"%s\n", lk->phys);
break;
case LK_SELFTEST_FAILED:
printk (KERN_ERR "lkkbd: Selftest failed on keyboard "
"at %s, keyboard may not work "
"properly\n", lk->phys);
break;
default:
printk (KERN_ERR "lkkbd: Unknown error %02x on "
"keyboard at %s\n", lk->id[2],
lk->phys);
break;
}
/*
* Try to hint user if there's a stuck key.
*/
if (lk->id[2] == LK_STUCK_KEY && lk->id[3] != 0)
printk (KERN_ERR "Scancode of stuck key is 0x%02x, keycode "
"is 0x%04x\n", lk->id[3],
lk->keycode[lk->id[3]]);
return;
}
/*
* lkkbd_interrupt() is called by the low level driver when a character
* is received.
*/
static irqreturn_t
lkkbd_interrupt (struct serio *serio, unsigned char data, unsigned int flags)
{
struct lkkbd *lk = serio_get_drvdata (serio);
int i;
DBG (KERN_INFO "Got byte 0x%02x\n", data);
if (lk->ignore_bytes > 0) {
DBG (KERN_INFO "Ignoring a byte on %s\n", lk->name);
lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;
if (lk->ignore_bytes == 0)
lkkbd_detection_done (lk);
return IRQ_HANDLED;
}
switch (data) {
case LK_ALL_KEYS_UP:
for (i = 0; i < ARRAY_SIZE (lkkbd_keycode); i++)
if (lk->keycode[i] != KEY_RESERVED)
input_report_key (lk->dev, lk->keycode[i], 0);
input_sync (lk->dev);
break;
case 0x01:
DBG (KERN_INFO "Got 0x01, scheduling re-initialization\n");
lk->ignore_bytes = LK_NUM_IGNORE_BYTES;
lk->id[LK_NUM_IGNORE_BYTES - lk->ignore_bytes--] = data;
schedule_work (&lk->tq);
break;
case LK_METRONOME:
case LK_OUTPUT_ERROR:
case LK_INPUT_ERROR:
case LK_KBD_LOCKED:
case LK_KBD_TEST_MODE_ACK:
case LK_PREFIX_KEY_DOWN:
case LK_MODE_CHANGE_ACK:
case LK_RESPONSE_RESERVED:
DBG (KERN_INFO "Got %s and don't know how to handle...\n",
response_name (data));
break;
default:
if (lk->keycode[data] != KEY_RESERVED) {
if (!test_bit (lk->keycode[data], lk->dev->key))
input_report_key (lk->dev, lk->keycode[data], 1);
else
input_report_key (lk->dev, lk->keycode[data], 0);
input_sync (lk->dev);
} else
printk (KERN_WARNING "%s: Unknown key with "
"scancode 0x%02x on %s.\n",
__FILE__, data, lk->name);
}
return IRQ_HANDLED;
}
/*
* lkkbd_event() handles events from the input module.
*/
static int
lkkbd_event (struct input_dev *dev, unsigned int type, unsigned int code,
int value)
{
struct lkkbd *lk = dev->private;
unsigned char leds_on = 0;
unsigned char leds_off = 0;
switch (type) {
case EV_LED:
CHECK_LED (lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK);
CHECK_LED (lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE);
CHECK_LED (lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK);
CHECK_LED (lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT);
if (leds_on != 0) {
lk->serio->write (lk->serio, LK_CMD_LED_ON);
lk->serio->write (lk->serio, leds_on);
}
if (leds_off != 0) {
lk->serio->write (lk->serio, LK_CMD_LED_OFF);
lk->serio->write (lk->serio, leds_off);
}
return 0;
case EV_SND:
switch (code) {
case SND_CLICK:
if (value == 0) {
DBG ("%s: Deactivating key clicks\n", __FUNCTION__);
lk->serio->write (lk->serio, LK_CMD_DISABLE_KEYCLICK);
lk->serio->write (lk->serio, LK_CMD_DISABLE_CTRCLICK);
} else {
DBG ("%s: Activating key clicks\n", __FUNCTION__);
lk->serio->write (lk->serio, LK_CMD_ENABLE_KEYCLICK);
lk->serio->write (lk->serio, volume_to_hw (lk->keyclick_volume));
lk->serio->write (lk->serio, LK_CMD_ENABLE_CTRCLICK);
lk->serio->write (lk->serio, volume_to_hw (lk->ctrlclick_volume));
}
return 0;
case SND_BELL:
if (value != 0)
lk->serio->write (lk->serio, LK_CMD_SOUND_BELL);
return 0;
}
break;
default:
printk (KERN_ERR "%s (): Got unknown type %d, code %d, value %d\n",
__FUNCTION__, type, code, value);
}
return -1;
}
/*
* lkkbd_reinit() sets leds and beeps to a state the computer remembers they
* were in.
*/
static void
lkkbd_reinit (void *data)
{
struct lkkbd *lk = data;
int division;
unsigned char leds_on = 0;
unsigned char leds_off = 0;
/* Ask for ID */
lk->serio->write (lk->serio, LK_CMD_REQUEST_ID);
/* Reset parameters */
lk->serio->write (lk->serio, LK_CMD_SET_DEFAULTS);
/* Set LEDs */
CHECK_LED (lk, leds_on, leds_off, LED_CAPSL, LK_LED_SHIFTLOCK);
CHECK_LED (lk, leds_on, leds_off, LED_COMPOSE, LK_LED_COMPOSE);
CHECK_LED (lk, leds_on, leds_off, LED_SCROLLL, LK_LED_SCROLLLOCK);
CHECK_LED (lk, leds_on, leds_off, LED_SLEEP, LK_LED_WAIT);
if (leds_on != 0) {
lk->serio->write (lk->serio, LK_CMD_LED_ON);
lk->serio->write (lk->serio, leds_on);
}
if (leds_off != 0) {
lk->serio->write (lk->serio, LK_CMD_LED_OFF);
lk->serio->write (lk->serio, leds_off);
}
/*
* Try to activate extended LK401 mode. This command will
* only work with a LK401 keyboard and grants access to
* LAlt, RAlt, RCompose and RShift.
*/
lk->serio->write (lk->serio, LK_CMD_ENABLE_LK401);
/* Set all keys to UPDOWN mode */
for (division = 1; division <= 14; division++)
lk->serio->write (lk->serio, LK_CMD_SET_MODE (LK_MODE_UPDOWN,
division));
/* Enable bell and set volume */
lk->serio->write (lk->serio, LK_CMD_ENABLE_BELL);
lk->serio->write (lk->serio, volume_to_hw (lk->bell_volume));
/* Enable/disable keyclick (and possibly set volume) */
if (test_bit (SND_CLICK, lk->dev->snd)) {
lk->serio->write (lk->serio, LK_CMD_ENABLE_KEYCLICK);
lk->serio->write (lk->serio, volume_to_hw (lk->keyclick_volume));
lk->serio->write (lk->serio, LK_CMD_ENABLE_CTRCLICK);
lk->serio->write (lk->serio, volume_to_hw (lk->ctrlclick_volume));
} else {
lk->serio->write (lk->serio, LK_CMD_DISABLE_KEYCLICK);
lk->serio->write (lk->serio, LK_CMD_DISABLE_CTRCLICK);
}
/* Sound the bell if needed */
if (test_bit (SND_BELL, lk->dev->snd))
lk->serio->write (lk->serio, LK_CMD_SOUND_BELL);
}
/*
* lkkbd_connect() probes for a LK keyboard and fills the necessary structures.
*/
static int
lkkbd_connect (struct serio *serio, struct serio_driver *drv)
{
struct lkkbd *lk;
struct input_dev *input_dev;
int i;
int err;
lk = kzalloc (sizeof (struct lkkbd), GFP_KERNEL);
input_dev = input_allocate_device ();
if (!lk || !input_dev) {
err = -ENOMEM;
goto fail;
}
lk->serio = serio;
lk->dev = input_dev;
INIT_WORK (&lk->tq, lkkbd_reinit, lk);
lk->bell_volume = bell_volume;
lk->keyclick_volume = keyclick_volume;
lk->ctrlclick_volume = ctrlclick_volume;
memcpy (lk->keycode, lkkbd_keycode, sizeof (lk_keycode_t) * LK_NUM_KEYCODES);
strlcpy (lk->name, "DEC LK keyboard", sizeof(lk->name));
snprintf (lk->phys, sizeof(lk->phys), "%s/input0", serio->phys);
input_dev->name = lk->name;
input_dev->phys = lk->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_LKKBD;
input_dev->id.product = 0;
input_dev->id.version = 0x0100;
input_dev->cdev.dev = &serio->dev;
input_dev->event = lkkbd_event;
input_dev->private = lk;
set_bit (EV_KEY, input_dev->evbit);
set_bit (EV_LED, input_dev->evbit);
set_bit (EV_SND, input_dev->evbit);
set_bit (EV_REP, input_dev->evbit);
set_bit (LED_CAPSL, input_dev->ledbit);
set_bit (LED_SLEEP, input_dev->ledbit);
set_bit (LED_COMPOSE, input_dev->ledbit);
set_bit (LED_SCROLLL, input_dev->ledbit);
set_bit (SND_BELL, input_dev->sndbit);
set_bit (SND_CLICK, input_dev->sndbit);
input_dev->keycode = lk->keycode;
input_dev->keycodesize = sizeof (lk_keycode_t);
input_dev->keycodemax = LK_NUM_KEYCODES;
for (i = 0; i < LK_NUM_KEYCODES; i++)
set_bit (lk->keycode[i], input_dev->keybit);
serio_set_drvdata (serio, lk);
err = serio_open (serio, drv);
if (err)
goto fail;
input_register_device (lk->dev);
lk->serio->write (lk->serio, LK_CMD_POWERCYCLE_RESET);
return 0;
fail: serio_set_drvdata (serio, NULL);
input_free_device (input_dev);
kfree (lk);
return err;
}
/*
* lkkbd_disconnect() unregisters and closes behind us.
*/
static void
lkkbd_disconnect (struct serio *serio)
{
struct lkkbd *lk = serio_get_drvdata (serio);
input_get_device (lk->dev);
input_unregister_device (lk->dev);
serio_close (serio);
serio_set_drvdata (serio, NULL);
input_put_device (lk->dev);
kfree (lk);
}
static struct serio_device_id lkkbd_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_LKKBD,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, lkkbd_serio_ids);
static struct serio_driver lkkbd_drv = {
.driver = {
.name = "lkkbd",
},
.description = DRIVER_DESC,
.id_table = lkkbd_serio_ids,
.connect = lkkbd_connect,
.disconnect = lkkbd_disconnect,
.interrupt = lkkbd_interrupt,
};
/*
* The functions for insering/removing us as a module.
*/
static int __init
lkkbd_init (void)
{
serio_register_driver(&lkkbd_drv);
return 0;
}
static void __exit
lkkbd_exit (void)
{
serio_unregister_driver(&lkkbd_drv);
}
module_init (lkkbd_init);
module_exit (lkkbd_exit);
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