1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/nvd0.c b/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/nvd0.c
new file mode 100644
index 000000000000..480d6d2af770
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/nvd0.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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 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 HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs
+ */
+
+#include "priv.h"
+
+void
+nvd0_gpio_reset(struct nouveau_gpio *gpio, u8 match)
+{
+	struct nouveau_bios *bios = nouveau_bios(gpio);
+	u8 ver, len;
+	u16 entry;
+	int ent = -1;
+
+	while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
+		u32 data = nv_ro32(bios, entry);
+		u8  line =   (data & 0x0000003f);
+		u8  defs = !!(data & 0x00000080);
+		u8  func =   (data & 0x0000ff00) >> 8;
+		u8  unk0 =   (data & 0x00ff0000) >> 16;
+		u8  unk1 =   (data & 0x1f000000) >> 24;
+
+		if ( func  == DCB_GPIO_UNUSED ||
+		    (match != DCB_GPIO_UNUSED && match != func))
+			continue;
+
+		gpio->set(gpio, 0, func, line, defs);
+
+		nv_mask(gpio, 0x00d610 + (line * 4), 0xff, unk0);
+		if (unk1--)
+			nv_mask(gpio, 0x00d740 + (unk1 * 4), 0xff, line);
+	}
+}
+
+int
+nvd0_gpio_drive(struct nouveau_gpio *gpio, int line, int dir, int out)
+{
+	u32 data = ((dir ^ 1) << 13) | (out << 12);
+	nv_mask(gpio, 0x00d610 + (line * 4), 0x00003000, data);
+	nv_mask(gpio, 0x00d604, 0x00000001, 0x00000001); /* update? */
+	return 0;
+}
+
+int
+nvd0_gpio_sense(struct nouveau_gpio *gpio, int line)
+{
+	return !!(nv_rd32(gpio, 0x00d610 + (line * 4)) & 0x00004000);
+}
+
+struct nouveau_oclass *
+nvd0_gpio_oclass = &(struct nouveau_gpio_impl) {
+	.base.handle = NV_SUBDEV(GPIO, 0xd0),
+	.base.ofuncs = &(struct nouveau_ofuncs) {
+		.ctor = _nouveau_gpio_ctor,
+		.dtor = _nouveau_gpio_dtor,
+		.init = _nouveau_gpio_init,
+		.fini = _nouveau_gpio_fini,
+	},
+	.lines = 32,
+	.intr_stat = nv94_gpio_intr_stat,
+	.intr_mask = nv94_gpio_intr_mask,
+	.drive = nvd0_gpio_drive,
+	.sense = nvd0_gpio_sense,
+	.reset = nvd0_gpio_reset,
+}.base;