linux/drivers/misc/ibmasm/remote.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * IBM ASM Service Processor Device Driver
   4 *
   5 * Copyright (C) IBM Corporation, 2004
   6 *
   7 * Authors: Max Asböck <amax@us.ibm.com>
   8 *          Vernon Mauery <vernux@us.ibm.com>
   9 */
  10
  11/* Remote mouse and keyboard event handling functions */
  12
  13#include <linux/pci.h>
  14#include "ibmasm.h"
  15#include "remote.h"
  16
  17#define MOUSE_X_MAX     1600
  18#define MOUSE_Y_MAX     1200
  19
  20static const unsigned short xlate_high[XLATE_SIZE] = {
  21        [KEY_SYM_ENTER & 0xff] = KEY_ENTER,
  22        [KEY_SYM_KPSLASH & 0xff] = KEY_KPSLASH,
  23        [KEY_SYM_KPSTAR & 0xff] = KEY_KPASTERISK,
  24        [KEY_SYM_KPMINUS & 0xff] = KEY_KPMINUS,
  25        [KEY_SYM_KPDOT & 0xff] = KEY_KPDOT,
  26        [KEY_SYM_KPPLUS & 0xff] = KEY_KPPLUS,
  27        [KEY_SYM_KP0 & 0xff] = KEY_KP0,
  28        [KEY_SYM_KP1 & 0xff] = KEY_KP1,
  29        [KEY_SYM_KP2 & 0xff] = KEY_KP2, [KEY_SYM_KPDOWN & 0xff] = KEY_KP2,
  30        [KEY_SYM_KP3 & 0xff] = KEY_KP3,
  31        [KEY_SYM_KP4 & 0xff] = KEY_KP4, [KEY_SYM_KPLEFT & 0xff] = KEY_KP4,
  32        [KEY_SYM_KP5 & 0xff] = KEY_KP5,
  33        [KEY_SYM_KP6 & 0xff] = KEY_KP6, [KEY_SYM_KPRIGHT & 0xff] = KEY_KP6,
  34        [KEY_SYM_KP7 & 0xff] = KEY_KP7,
  35        [KEY_SYM_KP8 & 0xff] = KEY_KP8, [KEY_SYM_KPUP & 0xff] = KEY_KP8,
  36        [KEY_SYM_KP9 & 0xff] = KEY_KP9,
  37        [KEY_SYM_BK_SPC & 0xff] = KEY_BACKSPACE,
  38        [KEY_SYM_TAB & 0xff] = KEY_TAB,
  39        [KEY_SYM_CTRL & 0xff] = KEY_LEFTCTRL,
  40        [KEY_SYM_ALT & 0xff] = KEY_LEFTALT,
  41        [KEY_SYM_INSERT & 0xff] = KEY_INSERT,
  42        [KEY_SYM_DELETE & 0xff] = KEY_DELETE,
  43        [KEY_SYM_SHIFT & 0xff] = KEY_LEFTSHIFT,
  44        [KEY_SYM_UARROW & 0xff] = KEY_UP,
  45        [KEY_SYM_DARROW & 0xff] = KEY_DOWN,
  46        [KEY_SYM_LARROW & 0xff] = KEY_LEFT,
  47        [KEY_SYM_RARROW & 0xff] = KEY_RIGHT,
  48        [KEY_SYM_ESCAPE & 0xff] = KEY_ESC,
  49        [KEY_SYM_PAGEUP & 0xff] = KEY_PAGEUP,
  50        [KEY_SYM_PAGEDOWN & 0xff] = KEY_PAGEDOWN,
  51        [KEY_SYM_HOME & 0xff] = KEY_HOME,
  52        [KEY_SYM_END & 0xff] = KEY_END,
  53        [KEY_SYM_F1 & 0xff] = KEY_F1,
  54        [KEY_SYM_F2 & 0xff] = KEY_F2,
  55        [KEY_SYM_F3 & 0xff] = KEY_F3,
  56        [KEY_SYM_F4 & 0xff] = KEY_F4,
  57        [KEY_SYM_F5 & 0xff] = KEY_F5,
  58        [KEY_SYM_F6 & 0xff] = KEY_F6,
  59        [KEY_SYM_F7 & 0xff] = KEY_F7,
  60        [KEY_SYM_F8 & 0xff] = KEY_F8,
  61        [KEY_SYM_F9 & 0xff] = KEY_F9,
  62        [KEY_SYM_F10 & 0xff] = KEY_F10,
  63        [KEY_SYM_F11 & 0xff] = KEY_F11,
  64        [KEY_SYM_F12 & 0xff] = KEY_F12,
  65        [KEY_SYM_CAP_LOCK & 0xff] = KEY_CAPSLOCK,
  66        [KEY_SYM_NUM_LOCK & 0xff] = KEY_NUMLOCK,
  67        [KEY_SYM_SCR_LOCK & 0xff] = KEY_SCROLLLOCK,
  68};
  69
  70static const unsigned short xlate[XLATE_SIZE] = {
  71        [NO_KEYCODE] = KEY_RESERVED,
  72        [KEY_SYM_SPACE] = KEY_SPACE,
  73        [KEY_SYM_TILDE] = KEY_GRAVE,        [KEY_SYM_BKTIC] = KEY_GRAVE,
  74        [KEY_SYM_ONE] = KEY_1,              [KEY_SYM_BANG] = KEY_1,
  75        [KEY_SYM_TWO] = KEY_2,              [KEY_SYM_AT] = KEY_2,
  76        [KEY_SYM_THREE] = KEY_3,            [KEY_SYM_POUND] = KEY_3,
  77        [KEY_SYM_FOUR] = KEY_4,             [KEY_SYM_DOLLAR] = KEY_4,
  78        [KEY_SYM_FIVE] = KEY_5,             [KEY_SYM_PERCENT] = KEY_5,
  79        [KEY_SYM_SIX] = KEY_6,              [KEY_SYM_CARAT] = KEY_6,
  80        [KEY_SYM_SEVEN] = KEY_7,            [KEY_SYM_AMPER] = KEY_7,
  81        [KEY_SYM_EIGHT] = KEY_8,            [KEY_SYM_STAR] = KEY_8,
  82        [KEY_SYM_NINE] = KEY_9,             [KEY_SYM_LPAREN] = KEY_9,
  83        [KEY_SYM_ZERO] = KEY_0,             [KEY_SYM_RPAREN] = KEY_0,
  84        [KEY_SYM_MINUS] = KEY_MINUS,        [KEY_SYM_USCORE] = KEY_MINUS,
  85        [KEY_SYM_EQUAL] = KEY_EQUAL,        [KEY_SYM_PLUS] = KEY_EQUAL,
  86        [KEY_SYM_LBRKT] = KEY_LEFTBRACE,    [KEY_SYM_LCURLY] = KEY_LEFTBRACE,
  87        [KEY_SYM_RBRKT] = KEY_RIGHTBRACE,   [KEY_SYM_RCURLY] = KEY_RIGHTBRACE,
  88        [KEY_SYM_SLASH] = KEY_BACKSLASH,    [KEY_SYM_PIPE] = KEY_BACKSLASH,
  89        [KEY_SYM_TIC] = KEY_APOSTROPHE,     [KEY_SYM_QUOTE] = KEY_APOSTROPHE,
  90        [KEY_SYM_SEMIC] = KEY_SEMICOLON,    [KEY_SYM_COLON] = KEY_SEMICOLON,
  91        [KEY_SYM_COMMA] = KEY_COMMA,        [KEY_SYM_LT] = KEY_COMMA,
  92        [KEY_SYM_PERIOD] = KEY_DOT,         [KEY_SYM_GT] = KEY_DOT,
  93        [KEY_SYM_BSLASH] = KEY_SLASH,       [KEY_SYM_QMARK] = KEY_SLASH,
  94        [KEY_SYM_A] = KEY_A,                [KEY_SYM_a] = KEY_A,
  95        [KEY_SYM_B] = KEY_B,                [KEY_SYM_b] = KEY_B,
  96        [KEY_SYM_C] = KEY_C,                [KEY_SYM_c] = KEY_C,
  97        [KEY_SYM_D] = KEY_D,                [KEY_SYM_d] = KEY_D,
  98        [KEY_SYM_E] = KEY_E,                [KEY_SYM_e] = KEY_E,
  99        [KEY_SYM_F] = KEY_F,                [KEY_SYM_f] = KEY_F,
 100        [KEY_SYM_G] = KEY_G,                [KEY_SYM_g] = KEY_G,
 101        [KEY_SYM_H] = KEY_H,                [KEY_SYM_h] = KEY_H,
 102        [KEY_SYM_I] = KEY_I,                [KEY_SYM_i] = KEY_I,
 103        [KEY_SYM_J] = KEY_J,                [KEY_SYM_j] = KEY_J,
 104        [KEY_SYM_K] = KEY_K,                [KEY_SYM_k] = KEY_K,
 105        [KEY_SYM_L] = KEY_L,                [KEY_SYM_l] = KEY_L,
 106        [KEY_SYM_M] = KEY_M,                [KEY_SYM_m] = KEY_M,
 107        [KEY_SYM_N] = KEY_N,                [KEY_SYM_n] = KEY_N,
 108        [KEY_SYM_O] = KEY_O,                [KEY_SYM_o] = KEY_O,
 109        [KEY_SYM_P] = KEY_P,                [KEY_SYM_p] = KEY_P,
 110        [KEY_SYM_Q] = KEY_Q,                [KEY_SYM_q] = KEY_Q,
 111        [KEY_SYM_R] = KEY_R,                [KEY_SYM_r] = KEY_R,
 112        [KEY_SYM_S] = KEY_S,                [KEY_SYM_s] = KEY_S,
 113        [KEY_SYM_T] = KEY_T,                [KEY_SYM_t] = KEY_T,
 114        [KEY_SYM_U] = KEY_U,                [KEY_SYM_u] = KEY_U,
 115        [KEY_SYM_V] = KEY_V,                [KEY_SYM_v] = KEY_V,
 116        [KEY_SYM_W] = KEY_W,                [KEY_SYM_w] = KEY_W,
 117        [KEY_SYM_X] = KEY_X,                [KEY_SYM_x] = KEY_X,
 118        [KEY_SYM_Y] = KEY_Y,                [KEY_SYM_y] = KEY_Y,
 119        [KEY_SYM_Z] = KEY_Z,                [KEY_SYM_z] = KEY_Z,
 120};
 121
 122static void print_input(struct remote_input *input)
 123{
 124        if (input->type == INPUT_TYPE_MOUSE) {
 125                unsigned char buttons = input->mouse_buttons;
 126                dbg("remote mouse movement: (x,y)=(%d,%d)%s%s%s%s\n",
 127                        input->data.mouse.x, input->data.mouse.y,
 128                        (buttons) ? " -- buttons:" : "",
 129                        (buttons & REMOTE_BUTTON_LEFT) ? "left " : "",
 130                        (buttons & REMOTE_BUTTON_MIDDLE) ? "middle " : "",
 131                        (buttons & REMOTE_BUTTON_RIGHT) ? "right" : ""
 132                      );
 133        } else {
 134                dbg("remote keypress (code, flag, down):"
 135                           "%d (0x%x) [0x%x] [0x%x]\n",
 136                                input->data.keyboard.key_code,
 137                                input->data.keyboard.key_code,
 138                                input->data.keyboard.key_flag,
 139                                input->data.keyboard.key_down
 140                      );
 141        }
 142}
 143
 144static void send_mouse_event(struct input_dev *dev, struct remote_input *input)
 145{
 146        unsigned char buttons = input->mouse_buttons;
 147
 148        input_report_abs(dev, ABS_X, input->data.mouse.x);
 149        input_report_abs(dev, ABS_Y, input->data.mouse.y);
 150        input_report_key(dev, BTN_LEFT, buttons & REMOTE_BUTTON_LEFT);
 151        input_report_key(dev, BTN_MIDDLE, buttons & REMOTE_BUTTON_MIDDLE);
 152        input_report_key(dev, BTN_RIGHT, buttons & REMOTE_BUTTON_RIGHT);
 153        input_sync(dev);
 154}
 155
 156static void send_keyboard_event(struct input_dev *dev,
 157                struct remote_input *input)
 158{
 159        unsigned int key;
 160        unsigned short code = input->data.keyboard.key_code;
 161
 162        if (code & 0xff00)
 163                key = xlate_high[code & 0xff];
 164        else
 165                key = xlate[code];
 166        input_report_key(dev, key, input->data.keyboard.key_down);
 167        input_sync(dev);
 168}
 169
 170void ibmasm_handle_mouse_interrupt(struct service_processor *sp)
 171{
 172        unsigned long reader;
 173        unsigned long writer;
 174        struct remote_input input;
 175
 176        reader = get_queue_reader(sp);
 177        writer = get_queue_writer(sp);
 178
 179        while (reader != writer) {
 180                memcpy_fromio(&input, get_queue_entry(sp, reader),
 181                                sizeof(struct remote_input));
 182
 183                print_input(&input);
 184                if (input.type == INPUT_TYPE_MOUSE) {
 185                        send_mouse_event(sp->remote.mouse_dev, &input);
 186                } else if (input.type == INPUT_TYPE_KEYBOARD) {
 187                        send_keyboard_event(sp->remote.keybd_dev, &input);
 188                } else
 189                        break;
 190
 191                reader = advance_queue_reader(sp, reader);
 192                writer = get_queue_writer(sp);
 193        }
 194}
 195
 196int ibmasm_init_remote_input_dev(struct service_processor *sp)
 197{
 198        /* set up the mouse input device */
 199        struct input_dev *mouse_dev, *keybd_dev;
 200        struct pci_dev *pdev = to_pci_dev(sp->dev);
 201        int error = -ENOMEM;
 202        int i;
 203
 204        sp->remote.mouse_dev = mouse_dev = input_allocate_device();
 205        sp->remote.keybd_dev = keybd_dev = input_allocate_device();
 206
 207        if (!mouse_dev || !keybd_dev)
 208                goto err_free_devices;
 209
 210        mouse_dev->id.bustype = BUS_PCI;
 211        mouse_dev->id.vendor = pdev->vendor;
 212        mouse_dev->id.product = pdev->device;
 213        mouse_dev->id.version = 1;
 214        mouse_dev->dev.parent = sp->dev;
 215        mouse_dev->evbit[0]  = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 216        mouse_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
 217                BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
 218        set_bit(BTN_TOUCH, mouse_dev->keybit);
 219        mouse_dev->name = "ibmasm RSA I remote mouse";
 220        input_set_abs_params(mouse_dev, ABS_X, 0, MOUSE_X_MAX, 0, 0);
 221        input_set_abs_params(mouse_dev, ABS_Y, 0, MOUSE_Y_MAX, 0, 0);
 222
 223        keybd_dev->id.bustype = BUS_PCI;
 224        keybd_dev->id.vendor = pdev->vendor;
 225        keybd_dev->id.product = pdev->device;
 226        keybd_dev->id.version = 2;
 227        keybd_dev->dev.parent = sp->dev;
 228        keybd_dev->evbit[0]  = BIT_MASK(EV_KEY);
 229        keybd_dev->name = "ibmasm RSA I remote keyboard";
 230
 231        for (i = 0; i < XLATE_SIZE; i++) {
 232                if (xlate_high[i])
 233                        set_bit(xlate_high[i], keybd_dev->keybit);
 234                if (xlate[i])
 235                        set_bit(xlate[i], keybd_dev->keybit);
 236        }
 237
 238        error = input_register_device(mouse_dev);
 239        if (error)
 240                goto err_free_devices;
 241
 242        error = input_register_device(keybd_dev);
 243        if (error)
 244                goto err_unregister_mouse_dev;
 245
 246        enable_mouse_interrupts(sp);
 247
 248        printk(KERN_INFO "ibmasm remote responding to events on RSA card %d\n", sp->number);
 249
 250        return 0;
 251
 252 err_unregister_mouse_dev:
 253        input_unregister_device(mouse_dev);
 254        mouse_dev = NULL; /* so we don't try to free it again below */
 255 err_free_devices:
 256        input_free_device(mouse_dev);
 257        input_free_device(keybd_dev);
 258
 259        return error;
 260}
 261
 262void ibmasm_free_remote_input_dev(struct service_processor *sp)
 263{
 264        disable_mouse_interrupts(sp);
 265        input_unregister_device(sp->remote.mouse_dev);
 266        input_unregister_device(sp->remote.keybd_dev);
 267}
 268
 269