1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c b/drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c
new file mode 100644
index 000000000000..078a2b9d6bd6
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c
@@ -0,0 +1,93 @@
+/*
+ * 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 <subdev/ltcg.h>
+
+struct nvc0_ltcg_priv {
+	struct nouveau_ltcg base;
+	u32 subp_nr;
+};
+
+static void
+nvc0_ltcg_subp_isr(struct nvc0_ltcg_priv *priv, int unit, int subp)
+{
+	u32 subp_base = 0x141000 + (unit * 0x2000) + (subp * 0x400);
+	u32 stat = nv_rd32(priv, subp_base + 0x020);
+
+	if (stat) {
+		nv_info(priv, "LTC%d_LTS%d: 0x%08x\n", unit, subp, stat);
+		nv_wr32(priv, subp_base + 0x020, stat);
+	}
+}
+
+static void
+nvc0_ltcg_intr(struct nouveau_subdev *subdev)
+{
+	struct nvc0_ltcg_priv *priv = (void *)subdev;
+	u32 units;
+
+	units = nv_rd32(priv, 0x00017c);
+	while (units) {
+		u32 subp, unit = ffs(units) - 1;
+		for (subp = 0; subp < priv->subp_nr; subp++)
+			nvc0_ltcg_subp_isr(priv, unit, subp);
+		units &= ~(1 << unit);
+	}
+
+	/* we do something horribly wrong and upset PMFB a lot, so mask off
+	 * interrupts from it after the first one until it's fixed
+	 */
+	nv_mask(priv, 0x000640, 0x02000000, 0x00000000);
+}
+
+static int
+nvc0_ltcg_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
+	       struct nouveau_oclass *oclass, void *data, u32 size,
+	       struct nouveau_object **pobject)
+{
+	struct nvc0_ltcg_priv *priv;
+	int ret;
+
+	ret = nouveau_ltcg_create(parent, engine, oclass, &priv);
+	*pobject = nv_object(priv);
+	if (ret)
+		return ret;
+
+	priv->subp_nr = nv_rd32(priv, 0x17e8dc) >> 24;
+	nv_mask(priv, 0x17e820, 0x00100000, 0x00000000); /* INTR_EN &= ~0x10 */
+
+	nv_subdev(priv)->intr = nvc0_ltcg_intr;
+	return 0;
+}
+
+struct nouveau_oclass
+nvc0_ltcg_oclass = {
+	.handle = NV_SUBDEV(LTCG, 0xc0),
+	.ofuncs = &(struct nouveau_ofuncs) {
+		.ctor = nvc0_ltcg_ctor,
+		.dtor = _nouveau_ltcg_dtor,
+		.init = _nouveau_ltcg_init,
+		.fini = _nouveau_ltcg_fini,
+	},
+};