add the 'goldfish' target, useful for experimenting with virtual phone hardware (includes the emulator)

SVN-Revision: 16459

1 files changed, 217 insertions, 0 deletions

diff --git a/target/linux/goldfish/patches-2.6.30/0072-PM-earlysuspend-Removing-dependence-on-console.patch b/target/linux/goldfish/patches-2.6.30/0072-PM-earlysuspend-Removing-dependence-on-console.patch
new file mode 100644
index 0000000000..489cfc0f48
--- /dev/null
+++ b/target/linux/goldfish/patches-2.6.30/0072-PM-earlysuspend-Removing-dependence-on-console.patch
@@ -0,0 +1,217 @@
+From ba801aa66e869f1f9f9d3a1610a2165baa024e4b Mon Sep 17 00:00:00 2001
+From: Rebecca Schultz <rschultz@google.com>
+Date: Thu, 17 Jul 2008 18:14:55 -0700
+Subject: [PATCH 072/134] PM: earlysuspend: Removing dependence on console.
+MIME-Version: 1.0
+Content-Type: text/plain; charset=utf-8
+Content-Transfer-Encoding: 8bit
+
+Rather than signaling a full update of the display from userspace via a
+console switch, this patch introduces 2 files int /sys/power,
+wait_for_fb_sleep and wait_for_fb_wake.  Reading these files will block
+until the requested state has been entered.  When a read from
+wait_for_fb_sleep returns userspace should stop drawing.  When
+wait_for_fb_wake returns, it should do a full update.  If either are called
+when the fb driver is already in the requested state, they will return
+immediately.
+
+Signed-off-by: Rebecca Schultz <rschultz@google.com>
+Signed-off-by: Arve Hjønnevåg <arve@android.com>
+---
+ kernel/power/Kconfig          |    9 +++
+ kernel/power/Makefile         |    1 +
+ kernel/power/fbearlysuspend.c |  153 +++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 163 insertions(+), 0 deletions(-)
+ create mode 100644 kernel/power/fbearlysuspend.c
+
+--- a/kernel/power/Kconfig
++++ b/kernel/power/Kconfig
+@@ -159,6 +159,7 @@ config EARLYSUSPEND
+ 
+ choice
+ 	prompt "User-space screen access"
++	default FB_EARLYSUSPEND if !FRAMEBUFFER_CONSOLE
+ 	default CONSOLE_EARLYSUSPEND
+ 	depends on HAS_EARLYSUSPEND
+ 
+@@ -172,6 +173,14 @@ choice
+ 		  Register early suspend handler to perform a console switch to
+ 		  when user-space should stop drawing to the screen and a switch
+ 		  back when it should resume.
++
++	config FB_EARLYSUSPEND
++		bool "Sysfs interface"
++		depends on HAS_EARLYSUSPEND
++		---help---
++		  Register early suspend handler that notifies and waits for
++		  user-space through sysfs when user-space should stop drawing
++		  to the screen and notifies user-space when it should resume.
+ endchoice
+ 
+ config HIBERNATION
+--- a/kernel/power/Makefile
++++ b/kernel/power/Makefile
+@@ -10,6 +10,7 @@ obj-$(CONFIG_WAKELOCK)		+= wakelock.o
+ obj-$(CONFIG_USER_WAKELOCK)	+= userwakelock.o
+ obj-$(CONFIG_EARLYSUSPEND)	+= earlysuspend.o
+ obj-$(CONFIG_CONSOLE_EARLYSUSPEND)	+= consoleearlysuspend.o
++obj-$(CONFIG_FB_EARLYSUSPEND)	+= fbearlysuspend.o
+ obj-$(CONFIG_HIBERNATION)	+= swsusp.o disk.o snapshot.o swap.o user.o
+ 
+ obj-$(CONFIG_MAGIC_SYSRQ)	+= poweroff.o
+--- /dev/null
++++ b/kernel/power/fbearlysuspend.c
+@@ -0,0 +1,153 @@
++/* kernel/power/fbearlysuspend.c
++ *
++ * Copyright (C) 2005-2008 Google, Inc.
++ *
++ * This software is licensed under the terms of the GNU General Public
++ * License version 2, as published by the Free Software Foundation, and
++ * may be copied, distributed, and modified under those terms.
++ *
++ * 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.
++ *
++ */
++
++#include <linux/earlysuspend.h>
++#include <linux/module.h>
++#include <linux/wait.h>
++
++#include "power.h"
++
++static wait_queue_head_t fb_state_wq;
++static DEFINE_SPINLOCK(fb_state_lock);
++static enum {
++	FB_STATE_STOPPED_DRAWING,
++	FB_STATE_REQUEST_STOP_DRAWING,
++	FB_STATE_DRAWING_OK,
++} fb_state;
++
++/* tell userspace to stop drawing, wait for it to stop */
++static void stop_drawing_early_suspend(struct early_suspend *h)
++{
++	int ret;
++	unsigned long irq_flags;
++
++	spin_lock_irqsave(&fb_state_lock, irq_flags);
++	fb_state = FB_STATE_REQUEST_STOP_DRAWING;
++	spin_unlock_irqrestore(&fb_state_lock, irq_flags);
++
++	wake_up_all(&fb_state_wq);
++	ret = wait_event_timeout(fb_state_wq,
++				 fb_state == FB_STATE_STOPPED_DRAWING,
++				 HZ);
++	if (unlikely(fb_state != FB_STATE_STOPPED_DRAWING))
++		pr_warning("stop_drawing_early_suspend: timeout waiting for "
++			   "userspace to stop drawing\n");
++}
++
++/* tell userspace to start drawing */
++static void start_drawing_late_resume(struct early_suspend *h)
++{
++	unsigned long irq_flags;
++
++	spin_lock_irqsave(&fb_state_lock, irq_flags);
++	fb_state = FB_STATE_DRAWING_OK;
++	spin_unlock_irqrestore(&fb_state_lock, irq_flags);
++	wake_up(&fb_state_wq);
++}
++
++static struct early_suspend stop_drawing_early_suspend_desc = {
++	.level = EARLY_SUSPEND_LEVEL_STOP_DRAWING,
++	.suspend = stop_drawing_early_suspend,
++	.resume = start_drawing_late_resume,
++};
++
++static ssize_t wait_for_fb_sleep_show(struct kobject *kobj,
++				      struct kobj_attribute *attr, char *buf)
++{
++	char *s = buf;
++	int ret;
++
++	ret = wait_event_interruptible(fb_state_wq,
++				       fb_state != FB_STATE_DRAWING_OK);
++	if (ret && fb_state == FB_STATE_DRAWING_OK)
++		return ret;
++	else
++		s += sprintf(buf, "sleeping");
++	return s - buf;
++}
++
++static ssize_t wait_for_fb_wake_show(struct kobject *kobj,
++				     struct kobj_attribute *attr, char *buf)
++{
++	char *s = buf;
++	int ret;
++	unsigned long irq_flags;
++
++	spin_lock_irqsave(&fb_state_lock, irq_flags);
++	if (fb_state == FB_STATE_REQUEST_STOP_DRAWING) {
++		fb_state = FB_STATE_STOPPED_DRAWING;
++		wake_up(&fb_state_wq);
++	}
++	spin_unlock_irqrestore(&fb_state_lock, irq_flags);
++
++	ret = wait_event_interruptible(fb_state_wq,
++				       fb_state == FB_STATE_DRAWING_OK);
++	if (ret && fb_state != FB_STATE_DRAWING_OK)
++		return ret;
++	else
++		s += sprintf(buf, "awake");
++
++	return s - buf;
++}
++
++#define power_ro_attr(_name) \
++static struct kobj_attribute _name##_attr = {	\
++	.attr	= {				\
++		.name = __stringify(_name),	\
++		.mode = 0444,			\
++	},					\
++	.show	= _name##_show,			\
++	.store	= NULL,		\
++}
++
++power_ro_attr(wait_for_fb_sleep);
++power_ro_attr(wait_for_fb_wake);
++
++static struct attribute *g[] = {
++	&wait_for_fb_sleep_attr.attr,
++	&wait_for_fb_wake_attr.attr,
++	NULL,
++};
++
++static struct attribute_group attr_group = {
++	.attrs = g,
++};
++
++static int __init android_power_init(void)
++{
++	int ret;
++
++	init_waitqueue_head(&fb_state_wq);
++	fb_state = FB_STATE_DRAWING_OK;
++
++	ret = sysfs_create_group(power_kobj, &attr_group);
++	if (ret) {
++		pr_err("android_power_init: sysfs_create_group failed\n");
++		return ret;
++	}
++
++	register_early_suspend(&stop_drawing_early_suspend_desc);
++	return 0;
++}
++
++static void  __exit android_power_exit(void)
++{
++	unregister_early_suspend(&stop_drawing_early_suspend_desc);
++	sysfs_remove_group(power_kobj, &attr_group);
++}
++
++module_init(android_power_init);
++module_exit(android_power_exit);
++