/* * Input driver to ExplorerPS/2 device driver module. * * Copyright (c) 1999-2002 Vojtech Pavlik * Copyright (c) 2004 Dmitry Torokhov * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. */ #define MOUSEDEV_MINOR_BASE 32#define MOUSEDEV_MINORS 32#define MOUSEDEV_MIX 31 #include <linux/slab.h>#include <linux/poll.h>#include <linux/module.h>#include <linux/moduleparam.h>#include <linux/init.h>#include <linux/input.h>#include <linux/smp_lock.h>#include <linux/random.h>#include <linux/major.h>#include <linux/device.h>#ifdef CONFIG_INPUT_MOUSEDEV_PSAUX#include <linux/miscdevice.h>#endif MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces");MODULE_LICENSE("GPL"); #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X#define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024#endif#ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y#define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768#endif static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X;module_param(xres, uint, 0644);MODULE_PARM_DESC(xres, "Horizontal screen resolution"); static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y;module_param(yres, uint, 0644);MODULE_PARM_DESC(yres, "Vertical screen resolution"); static unsigned tap_time = 200;module_param(tap_time, uint, 0644);MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)"); struct mousedev_hw_data { int dx, dy, dz; int x, y; int abs_event; unsigned long buttons;}; struct mousedev { int exist; int open; int minor; char name[16]; wait_queue_head_t wait; struct list_head list; struct input_handle handle; struct mousedev_hw_data packet; unsigned int pkt_count; int old_x[4], old_y[4]; int frac_dx, frac_dy; unsigned long touch;}; enum mousedev_emul { MOUSEDEV_EMUL_PS2, MOUSEDEV_EMUL_IMPS, MOUSEDEV_EMUL_EXPS}; struct mousedev_motion { int dx, dy, dz; unsigned long buttons;}; #define PACKET_QUEUE_LEN 16struct mousedev_list { struct fasync_struct *fasync; struct mousedev *mousedev; struct list_head node; struct mousedev_motion packets[PACKET_QUEUE_LEN]; unsigned int head, tail; spinlock_t packet_lock; int pos_x, pos_y; signed char ps2[6]; unsigned char ready, buffer, bufsiz; unsigned char imexseq, impsseq; enum mousedev_emul mode; unsigned long last_buttons;}; #define MOUSEDEV_SEQ_LEN 6 static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 };static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 }; static struct input_handler mousedev_handler; static struct mousedev *mousedev_table[MOUSEDEV_MINORS];static struct mousedev mousedev_mix; #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03])#define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03]) static void mousedev_touchpad_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value){ int size, tmp; enum { FRACTION_DENOM = 128 }; if (mousedev->touch) { size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; if (size == 0) size = 256 * 2; switch (code) { case ABS_X: fx(0) = value; if (mousedev->pkt_count >= 2) { tmp = ((value - fx(2)) * (256 * FRACTION_DENOM)) / size; tmp += mousedev->frac_dx; mousedev->packet.dx = tmp / FRACTION_DENOM; mousedev->frac_dx = tmp - mousedev->packet.dx * FRACTION_DENOM; } break; case ABS_Y: fy(0) = value; if (mousedev->pkt_count >= 2) { tmp = -((value - fy(2)) * (256 * FRACTION_DENOM)) / size; tmp += mousedev->frac_dy; mousedev->packet.dy = tmp / FRACTION_DENOM; mousedev->frac_dy = tmp - mousedev->packet.dy * FRACTION_DENOM; } break; } }} static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value){ int size; switch (code) { case ABS_X: size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; if (size == 0) size = xres ? : 1; if (value > dev->absmax[ABS_X]) value = dev->absmax[ABS_X]; if (value < dev->absmin[ABS_X]) value = dev->absmin[ABS_X]; mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size; mousedev->packet.abs_event = 1; break; case ABS_Y: size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y]; if (size == 0) size = yres ? : 1; if (value > dev->absmax[ABS_Y]) value = dev->absmax[ABS_Y]; if (value < dev->absmin[ABS_Y]) value = dev->absmin[ABS_Y]; mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size; mousedev->packet.abs_event = 1; break; }} static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value){ switch (code) { case REL_X: mousedev->packet.dx += value; break; case REL_Y: mousedev->packet.dy -= value; break; case REL_WHEEL: mousedev->packet.dz -= value; break; }} static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value){ int index; switch (code) { case BTN_TOUCH: case BTN_0: case BTN_LEFT: index = 0; break; case BTN_STYLUS: case BTN_1: case BTN_RIGHT: index = 1; break; case BTN_2: case BTN_FORWARD: case BTN_STYLUS2: case BTN_MIDDLE: index = 2; break; case BTN_3: case BTN_BACK: case BTN_SIDE: index = 3; break; case BTN_4: case BTN_EXTRA: index = 4; break; default: return; } if (value) { set_bit(index, &mousedev->packet.buttons); set_bit(index, &mousedev_mix.packet.buttons); } else { clear_bit(index, &mousedev->packet.buttons); clear_bit(index, &mousedev_mix.packet.buttons); }} static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet){ struct mousedev_list *list; struct mousedev_motion *p; unsigned long flags; int wake_readers = 0; list_for_each_entry(list, &mousedev->list, node) { spin_lock_irqsave(&list->packet_lock, flags); p = &list->packets[list->head]; if (list->ready && p->buttons != mousedev->packet.buttons) { unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN; if (new_head != list->tail) { p = &list->packets[list->head = new_head]; memset(p, 0, sizeof(struct mousedev_motion)); } } if (packet->abs_event) { p->dx += packet->x - list->pos_x; p->dy += packet->y - list->pos_y; list->pos_x = packet->x; list->pos_y = packet->y; } list->pos_x += packet->dx; list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x); list->pos_y += packet->dy; list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y); p->dx += packet->dx; p->dy += packet->dy; p->dz += packet->dz; p->buttons = mousedev->packet.buttons; if (p->dx || p->dy || p->dz || p->buttons != list->last_buttons) list->ready = 1; spin_unlock_irqrestore(&list->packet_lock, flags); if (list->ready) { kill_fasync(&list->fasync, SIGIO, POLL_IN); wake_readers = 1; } } if (wake_readers) wake_up_interruptible(&mousedev->wait);} static void mousedev_touchpad_touch(struct mousedev *mousedev, int value){ if (!value) { if (mousedev->touch && time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) { /* * Toggle left button to emulate tap. * We rely on the fact that mousedev_mix always has 0 * motion packet so we won't mess current position. */ set_bit(0, &mousedev->packet.buttons); set_bit(0, &mousedev_mix.packet.buttons); mousedev_notify_readers(mousedev, &mousedev_mix.packet); mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet); clear_bit(0, &mousedev->packet.buttons); clear_bit(0, &mousedev_mix.packet.buttons); } mousedev->touch = mousedev->pkt_count = 0; mousedev->frac_dx = 0; mousedev->frac_dy = 0; } else if (!mousedev->touch) mousedev->touch = jiffies;} static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value){ struct mousedev *mousedev = handle->private; switch (type) { case EV_ABS: /* Ignore joysticks */ if (test_bit(BTN_TRIGGER, handle->dev->keybit)) return; if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) mousedev_touchpad_event(handle->dev, mousedev, code, value); else mousedev_abs_event(handle->dev, mousedev, code, value); break; case EV_REL: mousedev_rel_event(mousedev, code, value); break; case EV_KEY: if (value != 2) { if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) mousedev_touchpad_touch(mousedev, value); else mousedev_key_event(mousedev, code, value); } break; case EV_SYN: if (code == SYN_REPORT) { if (mousedev->touch) { mousedev->pkt_count++; /* Input system eats duplicate events, but we need all of them * to do correct averaging so apply present one forward */ fx(0) = fx(1); fy(0) = fy(1); } mousedev_notify_readers(mousedev, &mousedev->packet); mousedev_notify_readers(&mousedev_mix, &mousedev->packet); mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0; mousedev->packet.abs_event = 0; } break; }} static int mousedev_fasync(int fd, struct file *file, int on){ int retval; struct mousedev_list *list = file->private_data; retval = fasync_helper(fd, file, on, &list->fasync); return retval < 0 ? retval : 0;} static void mousedev_free(struct mousedev *mousedev){ mousedev_table[mousedev->minor] = NULL; kfree(mousedev);} static void mixdev_release(void){ struct input_handle *handle; list_for_each_entry(handle, &mousedev_handler.h_list, h_node) { struct mousedev *mousedev = handle->private; if (!mousedev->open) { if (mousedev->exist) input_close_device(&mousedev->handle); else mousedev_free(mousedev); } }} static int mousedev_release(struct inode * inode, struct file * file){ struct mousedev_list *list = file->private_data; mousedev_fasync(-1, file, 0); list_del(&list->node); if (!--list->mousedev->open) { if (list->mousedev->minor == MOUSEDEV_MIX) mixdev_release(); else if (!mousedev_mix.open) { if (list->mousedev->exist) input_close_device(&list->mousedev->handle); else mousedev_free(list->mousedev); } } kfree(list); return 0;} static int mousedev_open(struct inode * inode, struct file * file){ struct mousedev_list *list; struct input_handle *handle; struct mousedev *mousedev; int i; #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX if (imajor(inode) == MISC_MAJOR) i = MOUSEDEV_MIX; else#endif i = iminor(inode) - MOUSEDEV_MINOR_BASE; if (i >= MOUSEDEV_MINORS || !mousedev_table[i]) return -ENODEV; if (!(list = kzalloc(sizeof(struct mousedev_list), GFP_KERNEL))) return -ENOMEM; spin_lock_init(&list->packet_lock); list->pos_x = xres / 2; list->pos_y = yres / 2; list->mousedev = mousedev_table[i]; list_add_tail(&list->node, &mousedev_table[i]->list); file->private_data = list; if (!list->mousedev->open++) { if (list->mousedev->minor == MOUSEDEV_MIX) { list_for_each_entry(handle, &mousedev_handler.h_list, h_node) { mousedev = handle->private; if (!mousedev->open && mousedev->exist) input_open_device(handle); } } else if (!mousedev_mix.open && list->mousedev->exist) input_open_device(&list->mousedev->handle); } return 0;} static inline int mousedev_limit_delta(int delta, int limit){ return delta > limit ? limit : (delta < -limit ? -limit : delta);} static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data){ struct mousedev_motion *p; unsigned long flags; spin_lock_irqsave(&list->packet_lock, flags); p = &list->packets[list->tail]; ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); ps2_data[1] = mousedev_limit_delta(p->dx, 127); ps2_data[2] = mousedev_limit_delta(p->dy, 127); p->dx -= ps2_data[1]; p->dy -= ps2_data[2]; switch (list->mode) { case MOUSEDEV_EMUL_EXPS: ps2_data[3] = mousedev_limit_delta(p->dz, 7); p->dz -= ps2_data[3]; ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); list->bufsiz = 4; break; case MOUSEDEV_EMUL_IMPS: ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); ps2_data[3] = mousedev_limit_delta(p->dz, 127); p->dz -= ps2_data[3]; list->bufsiz = 4; break; case MOUSEDEV_EMUL_PS2: default: ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); p->dz = 0; list->bufsiz = 3; break; } if (!p->dx && !p->dy && !p->dz) { if (list->tail == list->head) { list->ready = 0; list->last_buttons = p->buttons; } else list->tail = (list->tail + 1) % PACKET_QUEUE_LEN; } spin_unlock_irqrestore(&list->packet_lock, flags);} Lines 1–500 of 788. 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/* * Input driver to ExplorerPS/2 device driver module. * * Copyright (c) 1999-2002 Vojtech Pavlik * Copyright (c) 2004 Dmitry Torokhov * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. */ #define MOUSEDEV_MINOR_BASE 32 #define MOUSEDEV_MINORS 32 #define MOUSEDEV_MIX 31 #include <linux/slab.h> #include <linux/poll.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/input.h> #include <linux/smp_lock.h> #include <linux/random.h> #include <linux/major.h> #include <linux/device.h> #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX #include <linux/miscdevice.h> #endif MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces"); MODULE_LICENSE("GPL"); #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X #define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024 #endif #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768 #endif static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X; module_param(xres, uint, 0644); MODULE_PARM_DESC(xres, "Horizontal screen resolution"); static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y; module_param(yres, uint, 0644); MODULE_PARM_DESC(yres, "Vertical screen resolution"); static unsigned tap_time = 200; module_param(tap_time, uint, 0644); MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)"); struct mousedev_hw_data { int dx, dy, dz; int x, y; int abs_event; unsigned long buttons; }; struct mousedev { int exist; int open; int minor; char name[16]; wait_queue_head_t wait; struct list_head list; struct input_handle handle; struct mousedev_hw_data packet; unsigned int pkt_count; int old_x[4], old_y[4]; int frac_dx, frac_dy; unsigned long touch; }; enum mousedev_emul { MOUSEDEV_EMUL_PS2, MOUSEDEV_EMUL_IMPS, MOUSEDEV_EMUL_EXPS }; struct mousedev_motion { int dx, dy, dz; unsigned long buttons; }; #define PACKET_QUEUE_LEN 16 struct mousedev_list { struct fasync_struct *fasync; struct mousedev *mousedev; struct list_head node; struct mousedev_motion packets[PACKET_QUEUE_LEN]; unsigned int head, tail; spinlock_t packet_lock; int pos_x, pos_y; signed char ps2[6]; unsigned char ready, buffer, bufsiz; unsigned char imexseq, impsseq; enum mousedev_emul mode; unsigned long last_buttons; }; #define MOUSEDEV_SEQ_LEN 6 static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 }; static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 }; static struct input_handler mousedev_handler; static struct mousedev *mousedev_table[MOUSEDEV_MINORS]; static struct mousedev mousedev_mix; #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03]) #define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03]) static void mousedev_touchpad_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value) { int size, tmp; enum { FRACTION_DENOM = 128 }; if (mousedev->touch) { size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; if (size == 0) size = 256 * 2; switch (code) { case ABS_X: fx(0) = value; if (mousedev->pkt_count >= 2) { tmp = ((value - fx(2)) * (256 * FRACTION_DENOM)) / size; tmp += mousedev->frac_dx; mousedev->packet.dx = tmp / FRACTION_DENOM; mousedev->frac_dx = tmp - mousedev->packet.dx * FRACTION_DENOM; } break; case ABS_Y: fy(0) = value; if (mousedev->pkt_count >= 2) { tmp = -((value - fy(2)) * (256 * FRACTION_DENOM)) / size; tmp += mousedev->frac_dy; mousedev->packet.dy = tmp / FRACTION_DENOM; mousedev->frac_dy = tmp - mousedev->packet.dy * FRACTION_DENOM; } break; } } } static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, unsigned int code, int value) { int size; switch (code) { case ABS_X: size = dev->absmax[ABS_X] - dev->absmin[ABS_X]; if (size == 0) size = xres ? : 1; if (value > dev->absmax[ABS_X]) value = dev->absmax[ABS_X]; if (value < dev->absmin[ABS_X]) value = dev->absmin[ABS_X]; mousedev->packet.x = ((value - dev->absmin[ABS_X]) * xres) / size; mousedev->packet.abs_event = 1; break; case ABS_Y: size = dev->absmax[ABS_Y] - dev->absmin[ABS_Y]; if (size == 0) size = yres ? : 1; if (value > dev->absmax[ABS_Y]) value = dev->absmax[ABS_Y]; if (value < dev->absmin[ABS_Y]) value = dev->absmin[ABS_Y]; mousedev->packet.y = yres - ((value - dev->absmin[ABS_Y]) * yres) / size; mousedev->packet.abs_event = 1; break; } } static void mousedev_rel_event(struct mousedev *mousedev, unsigned int code, int value) { switch (code) { case REL_X: mousedev->packet.dx += value; break; case REL_Y: mousedev->packet.dy -= value; break; case REL_WHEEL: mousedev->packet.dz -= value; break; } } static void mousedev_key_event(struct mousedev *mousedev, unsigned int code, int value) { int index; switch (code) { case BTN_TOUCH: case BTN_0: case BTN_LEFT: index = 0; break; case BTN_STYLUS: case BTN_1: case BTN_RIGHT: index = 1; break; case BTN_2: case BTN_FORWARD: case BTN_STYLUS2: case BTN_MIDDLE: index = 2; break; case BTN_3: case BTN_BACK: case BTN_SIDE: index = 3; break; case BTN_4: case BTN_EXTRA: index = 4; break; default: return; } if (value) { set_bit(index, &mousedev->packet.buttons); set_bit(index, &mousedev_mix.packet.buttons); } else { clear_bit(index, &mousedev->packet.buttons); clear_bit(index, &mousedev_mix.packet.buttons); } } static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet) { struct mousedev_list *list; struct mousedev_motion *p; unsigned long flags; int wake_readers = 0; list_for_each_entry(list, &mousedev->list, node) { spin_lock_irqsave(&list->packet_lock, flags); p = &list->packets[list->head]; if (list->ready && p->buttons != mousedev->packet.buttons) { unsigned int new_head = (list->head + 1) % PACKET_QUEUE_LEN; if (new_head != list->tail) { p = &list->packets[list->head = new_head]; memset(p, 0, sizeof(struct mousedev_motion)); } } if (packet->abs_event) { p->dx += packet->x - list->pos_x; p->dy += packet->y - list->pos_y; list->pos_x = packet->x; list->pos_y = packet->y; } list->pos_x += packet->dx; list->pos_x = list->pos_x < 0 ? 0 : (list->pos_x >= xres ? xres : list->pos_x); list->pos_y += packet->dy; list->pos_y = list->pos_y < 0 ? 0 : (list->pos_y >= yres ? yres : list->pos_y); p->dx += packet->dx; p->dy += packet->dy; p->dz += packet->dz; p->buttons = mousedev->packet.buttons; if (p->dx || p->dy || p->dz || p->buttons != list->last_buttons) list->ready = 1; spin_unlock_irqrestore(&list->packet_lock, flags); if (list->ready) { kill_fasync(&list->fasync, SIGIO, POLL_IN); wake_readers = 1; } } if (wake_readers) wake_up_interruptible(&mousedev->wait); } static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) { if (!value) { if (mousedev->touch && time_before(jiffies, mousedev->touch + msecs_to_jiffies(tap_time))) { /* * Toggle left button to emulate tap. * We rely on the fact that mousedev_mix always has 0 * motion packet so we won't mess current position. */ set_bit(0, &mousedev->packet.buttons); set_bit(0, &mousedev_mix.packet.buttons); mousedev_notify_readers(mousedev, &mousedev_mix.packet); mousedev_notify_readers(&mousedev_mix, &mousedev_mix.packet); clear_bit(0, &mousedev->packet.buttons); clear_bit(0, &mousedev_mix.packet.buttons); } mousedev->touch = mousedev->pkt_count = 0; mousedev->frac_dx = 0; mousedev->frac_dy = 0; } else if (!mousedev->touch) mousedev->touch = jiffies; } static void mousedev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) { struct mousedev *mousedev = handle->private; switch (type) { case EV_ABS: /* Ignore joysticks */ if (test_bit(BTN_TRIGGER, handle->dev->keybit)) return; if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) mousedev_touchpad_event(handle->dev, mousedev, code, value); else mousedev_abs_event(handle->dev, mousedev, code, value); break; case EV_REL: mousedev_rel_event(mousedev, code, value); break; case EV_KEY: if (value != 2) { if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) mousedev_touchpad_touch(mousedev, value); else mousedev_key_event(mousedev, code, value); } break; case EV_SYN: if (code == SYN_REPORT) { if (mousedev->touch) { mousedev->pkt_count++; /* Input system eats duplicate events, but we need all of them * to do correct averaging so apply present one forward */ fx(0) = fx(1); fy(0) = fy(1); } mousedev_notify_readers(mousedev, &mousedev->packet); mousedev_notify_readers(&mousedev_mix, &mousedev->packet); mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0; mousedev->packet.abs_event = 0; } break; } } static int mousedev_fasync(int fd, struct file *file, int on) { int retval; struct mousedev_list *list = file->private_data; retval = fasync_helper(fd, file, on, &list->fasync); return retval < 0 ? retval : 0; } static void mousedev_free(struct mousedev *mousedev) { mousedev_table[mousedev->minor] = NULL; kfree(mousedev); } static void mixdev_release(void) { struct input_handle *handle; list_for_each_entry(handle, &mousedev_handler.h_list, h_node) { struct mousedev *mousedev = handle->private; if (!mousedev->open) { if (mousedev->exist) input_close_device(&mousedev->handle); else mousedev_free(mousedev); } } } static int mousedev_release(struct inode * inode, struct file * file) { struct mousedev_list *list = file->private_data; mousedev_fasync(-1, file, 0); list_del(&list->node); if (!--list->mousedev->open) { if (list->mousedev->minor == MOUSEDEV_MIX) mixdev_release(); else if (!mousedev_mix.open) { if (list->mousedev->exist) input_close_device(&list->mousedev->handle); else mousedev_free(list->mousedev); } } kfree(list); return 0; } static int mousedev_open(struct inode * inode, struct file * file) { struct mousedev_list *list; struct input_handle *handle; struct mousedev *mousedev; int i; #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX if (imajor(inode) == MISC_MAJOR) i = MOUSEDEV_MIX; else #endif i = iminor(inode) - MOUSEDEV_MINOR_BASE; if (i >= MOUSEDEV_MINORS || !mousedev_table[i]) return -ENODEV; if (!(list = kzalloc(sizeof(struct mousedev_list), GFP_KERNEL))) return -ENOMEM; spin_lock_init(&list->packet_lock); list->pos_x = xres / 2; list->pos_y = yres / 2; list->mousedev = mousedev_table[i]; list_add_tail(&list->node, &mousedev_table[i]->list); file->private_data = list; if (!list->mousedev->open++) { if (list->mousedev->minor == MOUSEDEV_MIX) { list_for_each_entry(handle, &mousedev_handler.h_list, h_node) { mousedev = handle->private; if (!mousedev->open && mousedev->exist) input_open_device(handle); } } else if (!mousedev_mix.open && list->mousedev->exist) input_open_device(&list->mousedev->handle); } return 0; } static inline int mousedev_limit_delta(int delta, int limit) { return delta > limit ? limit : (delta < -limit ? -limit : delta); } static void mousedev_packet(struct mousedev_list *list, signed char *ps2_data) { struct mousedev_motion *p; unsigned long flags; spin_lock_irqsave(&list->packet_lock, flags); p = &list->packets[list->tail]; ps2_data[0] = 0x08 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); ps2_data[1] = mousedev_limit_delta(p->dx, 127); ps2_data[2] = mousedev_limit_delta(p->dy, 127); p->dx -= ps2_data[1]; p->dy -= ps2_data[2]; switch (list->mode) { case MOUSEDEV_EMUL_EXPS: ps2_data[3] = mousedev_limit_delta(p->dz, 7); p->dz -= ps2_data[3]; ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); list->bufsiz = 4; break; case MOUSEDEV_EMUL_IMPS: ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); ps2_data[3] = mousedev_limit_delta(p->dz, 127); p->dz -= ps2_data[3]; list->bufsiz = 4; break; case MOUSEDEV_EMUL_PS2: default: ps2_data[0] |= ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); p->dz = 0; list->bufsiz = 3; break; } if (!p->dx && !p->dy && !p->dz) { if (list->tail == list->head) { list->ready = 0; list->last_buttons = p->buttons; } else list->tail = (list->tail + 1) % PACKET_QUEUE_LEN; } spin_unlock_irqrestore(&list->packet_lock, flags); }