1 files changed, 92 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nv10_gpio.c b/drivers/gpu/drm/nouveau/nv10_gpio.c
new file mode 100644
index 000000000000..007fc29e2f86
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nv10_gpio.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2009 Francisco Jerez.
+ * All Rights Reserved.
+ *
+ * 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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 "drmP.h"
+#include "nouveau_drv.h"
+#include "nouveau_hw.h"
+
+static bool
+get_gpio_location(struct dcb_gpio_entry *ent, uint32_t *reg, uint32_t *shift,
+                  uint32_t *mask)
+{
+        if (ent->line < 2) {
+                *reg = NV_PCRTC_GPIO;
+                *shift = ent->line * 16;
+                *mask = 0x11;
+
+        } else if (ent->line < 10) {
+                *reg = NV_PCRTC_GPIO_EXT;
+                *shift = (ent->line - 2) * 4;
+                *mask = 0x3;
+
+        } else if (ent->line < 14) {
+                *reg = NV_PCRTC_850;
+                *shift = (ent->line - 10) * 4;
+                *mask = 0x3;
+
+        } else {
+                return false;
+        }
+
+        return true;
+}
+
+int
+nv10_gpio_get(struct drm_device *dev, enum dcb_gpio_tag tag)
+{
+        struct dcb_gpio_entry *ent = nouveau_bios_gpio_entry(dev, tag);
+        uint32_t reg, shift, mask, value;
+
+        if (!ent)
+                return -ENODEV;
+
+        if (!get_gpio_location(ent, &reg, &shift, &mask))
+                return -ENODEV;
+
+        value = NVReadCRTC(dev, 0, reg) >> shift;
+
+        return (ent->invert ? 1 : 0) ^ (value & 1);
+}
+
+int
+nv10_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state)
+{
+        struct dcb_gpio_entry *ent = nouveau_bios_gpio_entry(dev, tag);
+        uint32_t reg, shift, mask, value;
+
+        if (!ent)
+                return -ENODEV;
+
+        if (!get_gpio_location(ent, &reg, &shift, &mask))
+                return -ENODEV;
+
+        value = ((ent->invert ? 1 : 0) ^ (state ? 1 : 0)) << shift;
+        mask = ~(mask << shift);
+
+        NVWriteCRTC(dev, 0, reg, value | (NVReadCRTC(dev, 0, reg) & mask));
+
+        return 0;
+}