volt: add GM20B driver

4 files changed, 119 insertions, 0 deletions

diff --git a/drm/nouveau/include/nvkm/subdev/volt.h b/drm/nouveau/include/nvkm/subdev/volt.h
index bbb8965b0..e27942ee1 100644
--- a/drm/nouveau/include/nvkm/subdev/volt.h
+++ b/drm/nouveau/include/nvkm/subdev/volt.h
@@ -21,4 +21,5 @@ int nvkm_volt_get_voltage_by_id(struct nvkm_volt *volt, u8 id);
 int nv40_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
 int gk104_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
 int gk20a_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
+int gm20b_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
 #endif
diff --git a/drm/nouveau/nvkm/engine/device/base.c b/drm/nouveau/nvkm/engine/device/base.c
index b1ba1c782..c9bfc4705 100644
--- a/drm/nouveau/nvkm/engine/device/base.c
+++ b/drm/nouveau/nvkm/engine/device/base.c
@@ -2037,6 +2037,7 @@ nv12b_chipset = {
 	.mc = gk20a_mc_new,
 	.mmu = gf100_mmu_new,
 	.timer = gk20a_timer_new,
+	.volt = gm20b_volt_new,
 	.ce[2] = gm204_ce_new,
 	.dma = gf119_dma_new,
 	.fifo = gm20b_fifo_new,
diff --git a/drm/nouveau/nvkm/subdev/volt/Kbuild b/drm/nouveau/nvkm/subdev/volt/Kbuild
index b035c6e28..c34076223 100644
--- a/drm/nouveau/nvkm/subdev/volt/Kbuild
+++ b/drm/nouveau/nvkm/subdev/volt/Kbuild
@@ -3,3 +3,4 @@ nvkm-y += nvkm/subdev/volt/gpio.o
 nvkm-y += nvkm/subdev/volt/nv40.o
 nvkm-y += nvkm/subdev/volt/gk104.o
 nvkm-y += nvkm/subdev/volt/gk20a.o
+nvkm-y += nvkm/subdev/volt/gm20b.o
diff --git a/drm/nouveau/nvkm/subdev/volt/gm20b.c b/drm/nouveau/nvkm/subdev/volt/gm20b.c
new file mode 100644
index 000000000..298548bb2
--- /dev/null
+++ b/drm/nouveau/nvkm/subdev/volt/gm20b.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2015, NVIDIA CORPORATION. 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 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 "priv.h"
+#include "gk20a.h"
+
+#include <core/tegra.h>
+
+const struct cvb_coef gm20b_na_cvb_coef[] = {
+	/* KHz,         c0,     c1,   c2,    c3,     c4,   c5 */
+	/*  76800 */ {  814294, 8144, -940, 808, -21583, 226 },
+	/* 153600 */ {  856185, 8144, -940, 808, -21583, 226 },
+	/* 230400 */ {  898077, 8144, -940, 808, -21583, 226 },
+	/* 307200 */ {  939968, 8144, -940, 808, -21583, 226 },
+	/* 384000 */ {  981860, 8144, -940, 808, -21583, 226 },
+	/* 460800 */ { 1023751, 8144, -940, 808, -21583, 226 },
+	/* 537600 */ { 1065642, 8144, -940, 808, -21583, 226 },
+	/* 614400 */ { 1107534, 8144, -940, 808, -21583, 226 },
+	/* 691200 */ { 1149425, 8144, -940, 808, -21583, 226 },
+	/* 768000 */ { 1191317, 8144, -940, 808, -21583, 226 },
+	/* 844800 */ { 1233208, 8144, -940, 808, -21583, 226 },
+	/* 921600 */ { 1275100, 8144, -940, 808, -21583, 226 },
+	/* 998400 */ { 1316991, 8144, -940, 808, -21583, 226 },
+};
+
+const struct cvb_coef gm20b_cvb_coef[] = {
+	/* KHz,             c0,      c1,   c2 */
+	/*  76800 */ { 1786666,  -85625, 1632 },
+	/* 153600 */ { 1846729,  -87525, 1632 },
+	/* 230400 */ { 1910480,  -89425, 1632 },
+	/* 307200 */ { 1977920,  -91325, 1632 },
+	/* 384000 */ { 2049049,  -93215, 1632 },
+	/* 460800 */ { 2122872,  -95095, 1632 },
+	/* 537600 */ { 2201331,  -96985, 1632 },
+	/* 614400 */ { 2283479,  -98885, 1632 },
+	/* 691200 */ { 2369315, -100785, 1632 },
+	/* 768000 */ { 2458841, -102685, 1632 },
+	/* 844800 */ { 2550821, -104555, 1632 },
+	/* 921600 */ { 2647676, -106455, 1632 },
+};
+
+static const struct nvkm_volt_func
+gm20b_volt = {
+	.vid_get = gk20a_volt_vid_get,
+	.vid_set = gk20a_volt_vid_set,
+	.set_id = gk20a_volt_set_id,
+};
+
+#define MAX_SPEEDO 4
+
+int
+gm20b_volt_new(struct nvkm_device *device, int index, struct nvkm_volt **pvolt)
+{
+	struct nvkm_device_tegra *tdev = device->func->tegra(device);
+	struct gk20a_volt *volt;
+	const struct cvb_coef *coef_table;
+	int i, uv;
+
+	if (!(volt = kzalloc(sizeof(*volt), GFP_KERNEL)))
+		return -ENOMEM;
+
+	nvkm_volt_ctor(&gm20b_volt, device, index, &volt->base);
+	*pvolt = &volt->base;
+
+	if (tdev->gpu_speedo_id > MAX_SPEEDO) {
+		nvkm_error(&volt->base.subdev, "Unsupported Speedo = %d\n",
+			   tdev->gpu_speedo_id);
+		return -EINVAL;
+	}
+
+	uv = regulator_get_voltage(tdev->vdd);
+	nvkm_info(&volt->base.subdev, "The default voltage is %duV\n", uv);
+
+	volt->vdd = tdev->vdd;
+
+	if (tdev->gpu_speedo_id >= 1) {
+		coef_table = gm20b_na_cvb_coef;
+		volt->base.vid_nr = ARRAY_SIZE(gm20b_na_cvb_coef);
+	} else {
+		coef_table = gm20b_cvb_coef;
+		volt->base.vid_nr = ARRAY_SIZE(gm20b_cvb_coef);
+	}
+
+	nvkm_debug(&volt->base.subdev, "%s - vid_nr = %d\n", __func__,
+		   volt->base.vid_nr);
+
+	for (i = 0; i < volt->base.vid_nr; i++) {
+		volt->base.vid[i].vid = i;
+		volt->base.vid[i].uv =
+			gk20a_volt_calc_voltage(&coef_table[i],
+						tdev->gpu_speedo_value);
+		nvkm_debug(&volt->base.subdev, "%2d: vid=%d, uv=%d\n", i,
+			   volt->base.vid[i].vid, volt->base.vid[i].uv);
+	}
+
+	return 0;
+}