module_param(yres, uint, 0);
MODULE_PARM_DESC(yres, "Vertical screen resolution");
-struct mousedev_motion {
+static unsigned tap_time = 200;
+module_param(tap_time, uint, 0);
+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 {
struct list_head list;
struct input_handle handle;
- struct mousedev_motion packet;
- unsigned long buttons;
+ struct mousedev_hw_data packet;
unsigned int pkt_count;
int old_x[4], old_y[4];
- unsigned int touch;
+ 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;
- int dx, dy, dz;
- unsigned long buttons;
+
+ 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 mode, imexseq, impsseq;
+ unsigned char imexseq, impsseq;
+ enum mousedev_emul mode;
};
#define MOUSEDEV_SEQ_LEN 6
case ABS_X:
size = dev->absmax[ABS_X] - dev->absmin[ABS_X];
if (size == 0) size = xres;
- mousedev->packet.dx = (value * xres - mousedev->old_x[0]) / size;
- mousedev->old_x[0] = mousedev->packet.dx * size;
+ 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;
- mousedev->packet.dy = (value * yres - mousedev->old_y[0]) / size;
- mousedev->old_y[0] = mousedev->packet.dy * size;
+ 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;
}
}
}
if (value) {
- set_bit(index, &mousedev->buttons);
- set_bit(index, &mousedev_mix.buttons);
+ set_bit(index, &mousedev->packet.buttons);
+ set_bit(index, &mousedev_mix.packet.buttons);
} else {
- clear_bit(index, &mousedev->buttons);
- clear_bit(index, &mousedev_mix.buttons);
+ clear_bit(index, &mousedev->packet.buttons);
+ clear_bit(index, &mousedev_mix.packet.buttons);
}
}
-static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_motion *packet)
+static void mousedev_notify_readers(struct mousedev *mousedev, struct mousedev_hw_data *packet)
{
struct mousedev_list *list;
+ struct mousedev_motion *p;
+ unsigned long flags;
list_for_each_entry(list, &mousedev->list, node) {
- list->dx += packet->dx;
- list->dy += packet->dy;
- list->dz += packet->dz;
- list->buttons = mousedev->buttons;
+ spin_lock_irqsave(&list->packet_lock, flags);
+
+ p = &list->packets[list->head];
+ if (list->ready && p->buttons != 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;
+
list->ready = 1;
+
+ spin_unlock_irqrestore(&list->packet_lock, flags);
kill_fasync(&list->fasync, SIGIO, POLL_IN);
}
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;
+ }
+ 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;
case EV_KEY:
if (value != 2) {
- if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) {
- /* Handle touchpad data */
- mousedev->touch = value;
- if (!mousedev->touch)
- mousedev->pkt_count = 0;
- }
+ if (code == BTN_TOUCH && test_bit(BTN_TOOL_FINGER, handle->dev->keybit))
+ mousedev_touchpad_touch(mousedev, value);
else
mousedev_key_event(mousedev, code, value);
}
mousedev_notify_readers(mousedev, &mousedev->packet);
mousedev_notify_readers(&mousedev_mix, &mousedev->packet);
- memset(&mousedev->packet, 0, sizeof(struct mousedev_motion));
+ mousedev->packet.dx = mousedev->packet.dy = mousedev->packet.dz = 0;
+ mousedev->packet.abs_event = 0;
}
break;
}
return -ENOMEM;
memset(list, 0, sizeof(struct mousedev_list));
+ 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;
return 0;
}
-static void mousedev_packet(struct mousedev_list *list, unsigned char off)
+static inline int mousedev_limit_delta(int delta, int limit)
{
- list->ps2[off] = 0x08 | ((list->dx < 0) << 4) | ((list->dy < 0) << 5) | (list->buttons & 0x07);
- list->ps2[off + 1] = (list->dx > 127 ? 127 : (list->dx < -127 ? -127 : list->dx));
- list->ps2[off + 2] = (list->dy > 127 ? 127 : (list->dy < -127 ? -127 : list->dy));
- list->dx -= list->ps2[off + 1];
- list->dy -= list->ps2[off + 2];
- list->bufsiz = off + 3;
-
- if (list->mode == 2) {
- list->ps2[off + 3] = (list->dz > 7 ? 7 : (list->dz < -7 ? -7 : list->dz));
- list->dz -= list->ps2[off + 3];
- list->ps2[off + 3] = (list->ps2[off + 3] & 0x0f) | ((list->buttons & 0x18) << 1);
- list->bufsiz++;
- } else {
- list->ps2[off] |= ((list->buttons & 0x10) >> 3) | ((list->buttons & 0x08) >> 1);
+ 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, 127);
+ 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 (list->mode == 1) {
- list->ps2[off + 3] = (list->dz > 127 ? 127 : (list->dz < -127 ? -127 : list->dz));
- list->dz -= list->ps2[off + 3];
- list->bufsiz++;
+ if (!p->dx && !p->dy && !p->dz) {
+ if (list->tail != list->head)
+ list->tail = (list->tail + 1) % PACKET_QUEUE_LEN;
+ if (list->tail == list->head)
+ list->ready = 0;
}
- if (!list->dx && !list->dy && (!list->mode || !list->dz)) list->ready = 0;
- list->buffer = list->bufsiz;
+ spin_unlock_irqrestore(&list->packet_lock, flags);
}
if (c == mousedev_imex_seq[list->imexseq]) {
if (++list->imexseq == MOUSEDEV_SEQ_LEN) {
list->imexseq = 0;
- list->mode = 2;
+ list->mode = MOUSEDEV_EMUL_EXPS;
}
} else list->imexseq = 0;
if (c == mousedev_imps_seq[list->impsseq]) {
if (++list->impsseq == MOUSEDEV_SEQ_LEN) {
list->impsseq = 0;
- list->mode = 1;
+ list->mode = MOUSEDEV_EMUL_IMPS;
}
} else list->impsseq = 0;
list->ps2[0] = 0xfa;
- list->bufsiz = 1;
switch (c) {
case 0xeb: /* Poll */
- mousedev_packet(list, 1);
+ mousedev_packet(list, &list->ps2[1]);
+ list->bufsiz++; /* account for leading ACK */
break;
case 0xf2: /* Get ID */
switch (list->mode) {
- case 0: list->ps2[1] = 0; break;
- case 1: list->ps2[1] = 3; break;
- case 2: list->ps2[1] = 4; break;
+ case MOUSEDEV_EMUL_PS2: list->ps2[1] = 0; break;
+ case MOUSEDEV_EMUL_IMPS: list->ps2[1] = 3; break;
+ case MOUSEDEV_EMUL_EXPS: list->ps2[1] = 4; break;
}
list->bufsiz = 2;
break;
break;
case 0xff: /* Reset */
- list->impsseq = 0;
- list->imexseq = 0;
- list->mode = 0;
- list->ps2[1] = 0xaa;
- list->ps2[2] = 0x00;
+ list->impsseq = list->imexseq = 0;
+ list->mode = MOUSEDEV_EMUL_PS2;
+ list->ps2[1] = 0xaa; list->ps2[2] = 0x00;
list->bufsiz = 3;
break;
+
+ default:
+ list->bufsiz = 1;
+ break;
}
list->buffer = list->bufsiz;
if (!list->ready && !list->buffer && (file->f_flags & O_NONBLOCK))
return -EAGAIN;
- retval = wait_event_interruptible(list->mousedev->wait, list->ready || list->buffer);
+ retval = wait_event_interruptible(list->mousedev->wait,
+ !list->mousedev->exist || list->ready || list->buffer);
if (retval)
return retval;
- if (!list->buffer && list->ready)
- mousedev_packet(list, 0);
+ if (!list->mousedev->exist)
+ return -ENODEV;
+
+ if (!list->buffer && list->ready) {
+ mousedev_packet(list, list->ps2);
+ list->buffer = list->bufsiz;
+ }
if (count > list->buffer)
count = list->buffer;
git://git.onelab.eu / linux-2.6.git / blobdiff