gma500: Add the glue to the various BIOS and firmware interfaces

Some of this should one day become a library shared by i915 and gma500 I
suspct. Best however to deal with that later once it is all nice and
stably merged.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/drivers/gpu/drm/gma500/intel_opregion.c b/drivers/gpu/drm/gma500/intel_opregion.c
new file mode 100644
index 000000000000..d2e60376982f
--- /dev/null
+++ b/drivers/gpu/drm/gma500/intel_opregion.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2010 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "psb_drv.h"
+
+struct opregion_header {
+        u8 signature[16];
+        u32 size;
+        u32 opregion_ver;
+        u8 bios_ver[32];
+        u8 vbios_ver[16];
+        u8 driver_ver[16];
+        u32 mboxes;
+        u8 reserved[164];
+} __packed;
+
+struct opregion_apci {
+        /*FIXME: add it later*/
+} __packed;
+
+struct opregion_swsci {
+        /*FIXME: add it later*/
+} __packed;
+
+struct opregion_acpi {
+        /*FIXME: add it later*/
+} __packed;
+
+int gma_intel_opregion_init(struct drm_device *dev)
+{
+        struct drm_psb_private *dev_priv = dev->dev_private;
+        u32 opregion_phy;
+        void *base;
+        u32 *lid_state;
+
+        dev_priv->lid_state = NULL;
+
+        pci_read_config_dword(dev->pdev, 0xfc, &opregion_phy);
+        if (opregion_phy == 0)
+                return -ENOTSUPP;
+
+        base = ioremap(opregion_phy, 8*1024);
+        if (!base)
+                return -ENOMEM;
+
+        lid_state = base + 0x01ac;
+
+        dev_priv->lid_state = lid_state;
+        dev_priv->lid_last_state = readl(lid_state);
+        return 0;
+}
+
+int gma_intel_opregion_exit(struct drm_device *dev)
+{
+        struct drm_psb_private *dev_priv = dev->dev_private;
+        if (dev_priv->lid_state)
+                iounmap(dev_priv->lid_state);
+        return 0;
+}