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linux/drivers/misc/ibmasm/remote.c
Max Asbock 278d72ae88 [PATCH] ibmasm driver: redesign handling of remote control events 
This patch rewrites the handling of remote control events.  Rather than making
them available from a special file in the ibmasmfs, now the events from the
RSA card get translated into kernel input events and injected into the input
subsystem.  The driver now will generate two /dev/input/eventX nodes -- one
for the keyboard and one for the mouse.  The mouse node generates absolute
events more like a touch pad than a mouse.

Signed-off-by: Vernon Mauery <vernux@us.ibm.com>
Signed-off-by: Max Asbock <masbock@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21 19:07:35 -07:00

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/*
* IBM ASM Service Processor Device Driver
*
* 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.
*
* Copyright (C) IBM Corporation, 2004
*
* Authors: Max Asböck <amax@us.ibm.com>
* Vernon Mauery <vernux@us.ibm.com>
*
*/
/* Remote mouse and keyboard event handling functions */
#include <linux/pci.h>
#include "ibmasm.h"
#include "remote.h"
static int xmax = 1600;
static int ymax = 1200;
static unsigned short xlate_high[XLATE_SIZE] = {
[KEY_SYM_ENTER & 0xff] = KEY_ENTER,
[KEY_SYM_KPSLASH & 0xff] = KEY_KPSLASH,
[KEY_SYM_KPSTAR & 0xff] = KEY_KPASTERISK,
[KEY_SYM_KPMINUS & 0xff] = KEY_KPMINUS,
[KEY_SYM_KPDOT & 0xff] = KEY_KPDOT,
[KEY_SYM_KPPLUS & 0xff] = KEY_KPPLUS,
[KEY_SYM_KP0 & 0xff] = KEY_KP0,
[KEY_SYM_KP1 & 0xff] = KEY_KP1,
[KEY_SYM_KP2 & 0xff] = KEY_KP2, [KEY_SYM_KPDOWN & 0xff] = KEY_KP2,
[KEY_SYM_KP3 & 0xff] = KEY_KP3,
[KEY_SYM_KP4 & 0xff] = KEY_KP4, [KEY_SYM_KPLEFT & 0xff] = KEY_KP4,
[KEY_SYM_KP5 & 0xff] = KEY_KP5,
[KEY_SYM_KP6 & 0xff] = KEY_KP6, [KEY_SYM_KPRIGHT & 0xff] = KEY_KP6,
[KEY_SYM_KP7 & 0xff] = KEY_KP7,
[KEY_SYM_KP8 & 0xff] = KEY_KP8, [KEY_SYM_KPUP & 0xff] = KEY_KP8,
[KEY_SYM_KP9 & 0xff] = KEY_KP9,
[KEY_SYM_BK_SPC & 0xff] = KEY_BACKSPACE,
[KEY_SYM_TAB & 0xff] = KEY_TAB,
[KEY_SYM_CTRL & 0xff] = KEY_LEFTCTRL,
[KEY_SYM_ALT & 0xff] = KEY_LEFTALT,
[KEY_SYM_INSERT & 0xff] = KEY_INSERT,
[KEY_SYM_DELETE & 0xff] = KEY_DELETE,
[KEY_SYM_SHIFT & 0xff] = KEY_LEFTSHIFT,
[KEY_SYM_UARROW & 0xff] = KEY_UP,
[KEY_SYM_DARROW & 0xff] = KEY_DOWN,
[KEY_SYM_LARROW & 0xff] = KEY_LEFT,
[KEY_SYM_RARROW & 0xff] = KEY_RIGHT,
[KEY_SYM_ESCAPE & 0xff] = KEY_ESC,
[KEY_SYM_PAGEUP & 0xff] = KEY_PAGEUP,
[KEY_SYM_PAGEDOWN & 0xff] = KEY_PAGEDOWN,
[KEY_SYM_HOME & 0xff] = KEY_HOME,
[KEY_SYM_END & 0xff] = KEY_END,
[KEY_SYM_F1 & 0xff] = KEY_F1,
[KEY_SYM_F2 & 0xff] = KEY_F2,
[KEY_SYM_F3 & 0xff] = KEY_F3,
[KEY_SYM_F4 & 0xff] = KEY_F4,
[KEY_SYM_F5 & 0xff] = KEY_F5,
[KEY_SYM_F6 & 0xff] = KEY_F6,
[KEY_SYM_F7 & 0xff] = KEY_F7,
[KEY_SYM_F8 & 0xff] = KEY_F8,
[KEY_SYM_F9 & 0xff] = KEY_F9,
[KEY_SYM_F10 & 0xff] = KEY_F10,
[KEY_SYM_F11 & 0xff] = KEY_F11,
[KEY_SYM_F12 & 0xff] = KEY_F12,
[KEY_SYM_CAP_LOCK & 0xff] = KEY_CAPSLOCK,
[KEY_SYM_NUM_LOCK & 0xff] = KEY_NUMLOCK,
[KEY_SYM_SCR_LOCK & 0xff] = KEY_SCROLLLOCK,
};
static unsigned short xlate[XLATE_SIZE] = {
[NO_KEYCODE] = KEY_RESERVED,
[KEY_SYM_SPACE] = KEY_SPACE,
[KEY_SYM_TILDE] = KEY_GRAVE, [KEY_SYM_BKTIC] = KEY_GRAVE,
[KEY_SYM_ONE] = KEY_1, [KEY_SYM_BANG] = KEY_1,
[KEY_SYM_TWO] = KEY_2, [KEY_SYM_AT] = KEY_2,
[KEY_SYM_THREE] = KEY_3, [KEY_SYM_POUND] = KEY_3,
[KEY_SYM_FOUR] = KEY_4, [KEY_SYM_DOLLAR] = KEY_4,
[KEY_SYM_FIVE] = KEY_5, [KEY_SYM_PERCENT] = KEY_5,
[KEY_SYM_SIX] = KEY_6, [KEY_SYM_CARAT] = KEY_6,
[KEY_SYM_SEVEN] = KEY_7, [KEY_SYM_AMPER] = KEY_7,
[KEY_SYM_EIGHT] = KEY_8, [KEY_SYM_STAR] = KEY_8,
[KEY_SYM_NINE] = KEY_9, [KEY_SYM_LPAREN] = KEY_9,
[KEY_SYM_ZERO] = KEY_0, [KEY_SYM_RPAREN] = KEY_0,
[KEY_SYM_MINUS] = KEY_MINUS, [KEY_SYM_USCORE] = KEY_MINUS,
[KEY_SYM_EQUAL] = KEY_EQUAL, [KEY_SYM_PLUS] = KEY_EQUAL,
[KEY_SYM_LBRKT] = KEY_LEFTBRACE, [KEY_SYM_LCURLY] = KEY_LEFTBRACE,
[KEY_SYM_RBRKT] = KEY_RIGHTBRACE, [KEY_SYM_RCURLY] = KEY_RIGHTBRACE,
[KEY_SYM_SLASH] = KEY_BACKSLASH, [KEY_SYM_PIPE] = KEY_BACKSLASH,
[KEY_SYM_TIC] = KEY_APOSTROPHE, [KEY_SYM_QUOTE] = KEY_APOSTROPHE,
[KEY_SYM_SEMIC] = KEY_SEMICOLON, [KEY_SYM_COLON] = KEY_SEMICOLON,
[KEY_SYM_COMMA] = KEY_COMMA, [KEY_SYM_LT] = KEY_COMMA,
[KEY_SYM_PERIOD] = KEY_DOT, [KEY_SYM_GT] = KEY_DOT,
[KEY_SYM_BSLASH] = KEY_SLASH, [KEY_SYM_QMARK] = KEY_SLASH,
[KEY_SYM_A] = KEY_A, [KEY_SYM_a] = KEY_A,
[KEY_SYM_B] = KEY_B, [KEY_SYM_b] = KEY_B,
[KEY_SYM_C] = KEY_C, [KEY_SYM_c] = KEY_C,
[KEY_SYM_D] = KEY_D, [KEY_SYM_d] = KEY_D,
[KEY_SYM_E] = KEY_E, [KEY_SYM_e] = KEY_E,
[KEY_SYM_F] = KEY_F, [KEY_SYM_f] = KEY_F,
[KEY_SYM_G] = KEY_G, [KEY_SYM_g] = KEY_G,
[KEY_SYM_H] = KEY_H, [KEY_SYM_h] = KEY_H,
[KEY_SYM_I] = KEY_I, [KEY_SYM_i] = KEY_I,
[KEY_SYM_J] = KEY_J, [KEY_SYM_j] = KEY_J,
[KEY_SYM_K] = KEY_K, [KEY_SYM_k] = KEY_K,
[KEY_SYM_L] = KEY_L, [KEY_SYM_l] = KEY_L,
[KEY_SYM_M] = KEY_M, [KEY_SYM_m] = KEY_M,
[KEY_SYM_N] = KEY_N, [KEY_SYM_n] = KEY_N,
[KEY_SYM_O] = KEY_O, [KEY_SYM_o] = KEY_O,
[KEY_SYM_P] = KEY_P, [KEY_SYM_p] = KEY_P,
[KEY_SYM_Q] = KEY_Q, [KEY_SYM_q] = KEY_Q,
[KEY_SYM_R] = KEY_R, [KEY_SYM_r] = KEY_R,
[KEY_SYM_S] = KEY_S, [KEY_SYM_s] = KEY_S,
[KEY_SYM_T] = KEY_T, [KEY_SYM_t] = KEY_T,
[KEY_SYM_U] = KEY_U, [KEY_SYM_u] = KEY_U,
[KEY_SYM_V] = KEY_V, [KEY_SYM_v] = KEY_V,
[KEY_SYM_W] = KEY_W, [KEY_SYM_w] = KEY_W,
[KEY_SYM_X] = KEY_X, [KEY_SYM_x] = KEY_X,
[KEY_SYM_Y] = KEY_Y, [KEY_SYM_y] = KEY_Y,
[KEY_SYM_Z] = KEY_Z, [KEY_SYM_z] = KEY_Z,
};
static char remote_mouse_name[] = "ibmasm RSA I remote mouse";
static char remote_keybd_name[] = "ibmasm RSA I remote keyboard";
static void print_input(struct remote_input *input)
{
if (input->type == INPUT_TYPE_MOUSE) {
unsigned char buttons = input->mouse_buttons;
dbg("remote mouse movement: (x,y)=(%d,%d)%s%s%s%s\n",
input->data.mouse.x, input->data.mouse.y,
(buttons)?" -- buttons:":"",
(buttons & REMOTE_BUTTON_LEFT)?"left ":"",
(buttons & REMOTE_BUTTON_MIDDLE)?"middle ":"",
(buttons & REMOTE_BUTTON_RIGHT)?"right":""
);
} else {
dbg("remote keypress (code, flag, down):"
"%d (0x%x) [0x%x] [0x%x]\n",
input->data.keyboard.key_code,
input->data.keyboard.key_code,
input->data.keyboard.key_flag,
input->data.keyboard.key_down
);
}
}
static void send_mouse_event(struct input_dev *dev, struct pt_regs *regs,
struct remote_input *input)
{
unsigned char buttons = input->mouse_buttons;
input_regs(dev, regs);
input_report_abs(dev, ABS_X, input->data.mouse.x);
input_report_abs(dev, ABS_Y, input->data.mouse.y);
input_report_key(dev, BTN_LEFT, buttons & REMOTE_BUTTON_LEFT);
input_report_key(dev, BTN_MIDDLE, buttons & REMOTE_BUTTON_MIDDLE);
input_report_key(dev, BTN_RIGHT, buttons & REMOTE_BUTTON_RIGHT);
input_sync(dev);
}
static void send_keyboard_event(struct input_dev *dev, struct pt_regs *regs,
struct remote_input *input)
{
unsigned int key;
unsigned short code = input->data.keyboard.key_code;
if (code & 0xff00)
key = xlate_high[code & 0xff];
else
key = xlate[code];
input_regs(dev, regs);
input_report_key(dev, key, (input->data.keyboard.key_down) ? 1 : 0);
input_sync(dev);
}
void ibmasm_handle_mouse_interrupt(struct service_processor *sp,
struct pt_regs *regs)
{
unsigned long reader;
unsigned long writer;
struct remote_input input;
reader = get_queue_reader(sp);
writer = get_queue_writer(sp);
while (reader != writer) {
memcpy_fromio(&input, get_queue_entry(sp, reader),
sizeof(struct remote_input));
print_input(&input);
if (input.type == INPUT_TYPE_MOUSE) {
send_mouse_event(&sp->remote->mouse_dev, regs, &input);
} else if (input.type == INPUT_TYPE_KEYBOARD) {
send_keyboard_event(&sp->remote->keybd_dev, regs, &input);
} else
break;
reader = advance_queue_reader(sp, reader);
writer = get_queue_writer(sp);
}
}
int ibmasm_init_remote_input_dev(struct service_processor *sp)
{
/* set up the mouse input device */
struct ibmasm_remote *remote;
struct pci_dev *pdev = to_pci_dev(sp->dev);
int i;
sp->remote = remote = kmalloc(sizeof(*remote), GFP_KERNEL);
if (!remote)
return -ENOMEM;
memset(remote, 0, sizeof(*remote));
remote->mouse_dev.private = remote;
init_input_dev(&remote->mouse_dev);
remote->mouse_dev.id.vendor = pdev->vendor;
remote->mouse_dev.id.product = pdev->device;
remote->mouse_dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
remote->mouse_dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) |
BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
set_bit(BTN_TOUCH, remote->mouse_dev.keybit);
remote->mouse_dev.name = remote_mouse_name;
input_set_abs_params(&remote->mouse_dev, ABS_X, 0, xmax, 0, 0);
input_set_abs_params(&remote->mouse_dev, ABS_Y, 0, ymax, 0, 0);
remote->keybd_dev.private = remote;
init_input_dev(&remote->keybd_dev);
remote->keybd_dev.id.vendor = pdev->vendor;
remote->keybd_dev.id.product = pdev->device;
remote->keybd_dev.evbit[0] = BIT(EV_KEY);
remote->keybd_dev.name = remote_keybd_name;
for (i=0; i<XLATE_SIZE; i++) {
if (xlate_high[i])
set_bit(xlate_high[i], remote->keybd_dev.keybit);
if (xlate[i])
set_bit(xlate[i], remote->keybd_dev.keybit);
}
input_register_device(&remote->mouse_dev);
input_register_device(&remote->keybd_dev);
enable_mouse_interrupts(sp);
printk(KERN_INFO "ibmasm remote responding to events on RSA card %d\n", sp->number);
return 0;
}
void ibmasm_free_remote_input_dev(struct service_processor *sp)
{
disable_mouse_interrupts(sp);
input_unregister_device(&sp->remote->keybd_dev);
input_unregister_device(&sp->remote->mouse_dev);
kfree(sp->remote);
}
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