[PATCH] Add Intel GMA500(Poulsbo) Stub Driver

[Lee, Chun-Yi]

Currently, there have no GMA500(Poulsbo) native video driver to support
intel opregion. So, use this stub driver to enable the acpi backlight
control sysfs entry files by requrest acpi_video_register.

Signed-off-by: Lee, Chun-Yi <jlee@xxxxxxxxxx>
---
 drivers/gpu/Makefile       |    2 +-
 drivers/gpu/stub/Kconfig   |   13 +++++++++
 drivers/gpu/stub/Makefile  |    1 +
 drivers/gpu/stub/poulsbo.c |   63 ++++++++++++++++++++++++++++++++++++++++++++
 drivers/video/Kconfig      |    2 +
 5 files changed, 80 insertions(+), 1 deletions(-)
 create mode 100644 drivers/gpu/stub/Kconfig
 create mode 100644 drivers/gpu/stub/Makefile
 create mode 100644 drivers/gpu/stub/poulsbo.c

diff --git a/drivers/gpu/Makefile b/drivers/gpu/Makefile
index 30879df..cc92778 100644
--- a/drivers/gpu/Makefile
+++ b/drivers/gpu/Makefile
@@ -1 +1 @@
-obj-y			+= drm/ vga/
+obj-y			+= drm/ vga/ stub/
diff --git a/drivers/gpu/stub/Kconfig b/drivers/gpu/stub/Kconfig
new file mode 100644
index 0000000..8f5a540
--- /dev/null
+++ b/drivers/gpu/stub/Kconfig
@@ -0,0 +1,13 @@
+config STUB_POULSBO
+	tristate "Intel GMA500 Stub Driver"
+	depends on PCI
+        # Poulsbo stub depends on ACPI_VIDEO when ACPI is enabled
+        # but for select to work, need to select ACPI_VIDEO's dependencies, ick
+        select ACPI_VIDEO if ACPI
+	help
+	  Choose this option if you have a system that has Intel GMA500
+	  (Poulsbo) integrated graphics. If M is selected, the module will
+	  be called Poulsbo. This driver is a stub driver for Poulsbo that
+	  will call poulsbo.ko to enable the acpi backlight control sysfs
+	  entry file because there have no poulsbo native driver can support
+	  intel opregion.
diff --git a/drivers/gpu/stub/Makefile b/drivers/gpu/stub/Makefile
new file mode 100644
index 0000000..cd940cc
--- /dev/null
+++ b/drivers/gpu/stub/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_STUB_POULSBO) += poulsbo.o
diff --git a/drivers/gpu/stub/poulsbo.c b/drivers/gpu/stub/poulsbo.c
new file mode 100644
index 0000000..d8aa636
--- /dev/null
+++ b/drivers/gpu/stub/poulsbo.c
@@ -0,0 +1,63 @@
+/*
+ * Intel Poulsbo Stub driver
+ *
+ * Copyright (C) 2010 Novell <jlee@xxxxxxxxxx>
+ *
+ * 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <acpi/video.h>
+
+#define DRIVER_NAME "poulsbo"
+
+enum {
+	CHIP_PSB_8108 = 0,
+	CHIP_PSB_8109 = 1,
+};
+
+static struct pci_device_id pciidlist[] = {
+	{0x8086, 0x8108, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_PSB_8108}, \
+	{0x8086, 0x8109, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_PSB_8109}, \
+	{0, 0, 0}
+};
+
+static int poulsbo_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	return acpi_video_register();
+}
+
+static void poulsbo_remove(struct pci_dev *pdev)
+{
+	acpi_video_unregister();
+}
+
+static struct pci_driver poulsbo_driver = {
+	.name = DRIVER_NAME,
+	.id_table = pciidlist,
+	.probe = poulsbo_probe,
+	.remove = poulsbo_remove,
+};
+
+static int __init poulsbo_init(void)
+{
+	return pci_register_driver(&poulsbo_driver);
+}
+
+static void __exit poulsbo_exit(void)
+{
+	pci_unregister_driver(&poulsbo_driver);
+}
+
+module_init(poulsbo_init);
+module_exit(poulsbo_exit);
+
+MODULE_AUTHOR("Lee, Chun-Yi <jlee@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Poulsbo Stub Driver");
+MODULE_LICENSE("GPL");
+
+MODULE_DEVICE_TABLE(pci, pciidlist);
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 8b31fdf..8807ae5 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -17,6 +17,8 @@ source "drivers/gpu/vga/Kconfig"
 
 source "drivers/gpu/drm/Kconfig"
 
+source "drivers/gpu/stub/Kconfig"
+
 config VGASTATE
        tristate
        default n
-- 
1.6.0.2

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