Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 152 insertions, 0 deletions

diff --git a/drivers/misc/ibmasm/remote.c b/drivers/misc/ibmasm/remote.c
new file mode 100644
index 000000000000..520c3f10c271
--- /dev/null
+++ b/drivers/misc/ibmasm/remote.c
@@ -0,0 +1,152 @@
+
+/*
+ * 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
+ *
+ * Author: Max Asböck <amax@us.ibm.com> 
+ *
+ */
+
+/* Remote mouse and keyboard event handling functions */
+
+#include "ibmasm.h"
+#include "remote.h"
+
+int ibmasm_init_remote_queue(struct service_processor *sp)
+{
+        struct remote_queue *q = &sp->remote_queue;
+
+        disable_mouse_interrupts(sp);
+
+        q->open = 0;
+        q->size = 0;
+
+        q->start = kmalloc(DRIVER_REMOTE_QUEUE_SIZE * sizeof(struct remote_event), GFP_KERNEL);
+        if (q->start == 0)
+                return -ENOMEM;
+
+        q->end = q->start + DRIVER_REMOTE_QUEUE_SIZE;
+        q->reader = q->start;
+        q->writer = q->start;
+        q->size = DRIVER_REMOTE_QUEUE_SIZE;
+        init_waitqueue_head(&q->wait);
+
+        return 0;
+}
+
+void ibmasm_free_remote_queue(struct service_processor *sp)
+{
+        kfree(sp->remote_queue.start);
+}
+
+void ibmasm_advance_reader(struct remote_queue *q, unsigned int n)
+{
+        q->reader += n;
+        if (q->reader >= q->end)
+                q->reader -= q->size;
+}
+
+size_t ibmasm_events_available(struct remote_queue *q)
+{
+        ssize_t diff = q->writer - q->reader;
+ 
+        return (diff >= 0) ? diff : q->end - q->reader; 
+}
+        
+
+static int space_free(struct remote_queue *q)
+{
+        if (q->reader == q->writer)
+                return q->size - 1;
+
+        return ( (q->reader + q->size - q->writer) % q->size ) - 1;
+}
+
+static void set_mouse_event(struct remote_input *input, struct mouse_event *mouse)
+{
+        static char last_buttons = 0;
+
+        mouse->x = input->data.mouse.x;
+        mouse->y = input->data.mouse.y;
+
+        if (input->mouse_buttons == REMOTE_MOUSE_DOUBLE_CLICK) {
+                mouse->buttons = REMOTE_MOUSE_DOUBLE_CLICK;
+                last_buttons = 0;
+                return;
+        }
+        mouse->transitions = last_buttons ^ input->mouse_buttons;
+        mouse->buttons = input->mouse_buttons;
+
+        last_buttons = input->mouse_buttons;
+}
+
+static void set_keyboard_event(struct remote_input *input, struct keyboard_event *keyboard)
+{
+        keyboard->key_code = input->data.keyboard.key_code;
+        keyboard->key_down = input->data.keyboard.key_down;
+}
+
+static int add_to_driver_queue(struct remote_queue *q, struct remote_input *input)
+{
+        struct remote_event *event = q->writer;
+
+        if (space_free(q) < 1) {
+                return 1;
+        }
+
+        switch(input->type) {
+        case (INPUT_TYPE_MOUSE):
+                event->type = INPUT_TYPE_MOUSE;
+                set_mouse_event(input, &event->data.mouse);
+                break;
+        case (INPUT_TYPE_KEYBOARD):
+                event->type = INPUT_TYPE_KEYBOARD;
+                set_keyboard_event(input, &event->data.keyboard);
+                break;
+        default:
+                return 0;
+        }
+        event->type = input->type;
+
+        q->writer++;
+        if (q->writer == q->end)
+                q->writer = q->start;
+
+        return 0;
+}
+        
+
+void ibmasm_handle_mouse_interrupt(struct service_processor *sp)
+{
+        unsigned long reader;
+        unsigned long writer;
+        struct remote_input input;
+
+        reader = get_queue_reader(sp);
+        writer = get_queue_writer(sp);
+
+        while (reader != writer) {
+                memcpy(&input, (void *)get_queue_entry(sp, reader), sizeof(struct remote_input));
+
+                if (add_to_driver_queue(&sp->remote_queue, &input))
+                        break;
+
+                reader = advance_queue_reader(sp, reader);
+        }
+        wake_up_interruptible(&sp->remote_queue.wait);
+}