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path: root/drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c94
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c
new file mode 100644
index 000000000..0dfb15a27
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/fan.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2014 Martin Peres
+ *
+ * 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: Martin Peres
+ */
+#include <subdev/bios.h>
+#include <subdev/bios/bit.h>
+#include <subdev/bios/fan.h>
+
+static u32
+nvbios_fan_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
+{
+ struct bit_entry bit_P;
+ u32 fan = 0;
+
+ if (!bit_entry(bios, 'P', &bit_P)) {
+ if (bit_P.version == 2 && bit_P.length >= 0x5c)
+ fan = nvbios_rd32(bios, bit_P.offset + 0x58);
+
+ if (fan) {
+ *ver = nvbios_rd08(bios, fan + 0);
+ switch (*ver) {
+ case 0x10:
+ *hdr = nvbios_rd08(bios, fan + 1);
+ *len = nvbios_rd08(bios, fan + 2);
+ *cnt = nvbios_rd08(bios, fan + 3);
+ return fan;
+ default:
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static u32
+nvbios_fan_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
+ u8 *cnt, u8 *len)
+{
+ u32 data = nvbios_fan_table(bios, ver, hdr, cnt, len);
+ if (data && idx < *cnt)
+ return data + *hdr + (idx * (*len));
+ return 0;
+}
+
+u32
+nvbios_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan)
+{
+ u8 ver, hdr, cnt, len;
+
+ u32 data = nvbios_fan_entry(bios, 0, &ver, &hdr, &cnt, &len);
+ if (data) {
+ u8 type = nvbios_rd08(bios, data + 0x00);
+ switch (type) {
+ case 0:
+ fan->type = NVBIOS_THERM_FAN_TOGGLE;
+ break;
+ case 1:
+ case 2:
+ /* TODO: Understand the difference between the two! */
+ fan->type = NVBIOS_THERM_FAN_PWM;
+ break;
+ default:
+ fan->type = NVBIOS_THERM_FAN_UNK;
+ }
+
+ fan->fan_mode = NVBIOS_THERM_FAN_LINEAR;
+ fan->min_duty = nvbios_rd08(bios, data + 0x02);
+ fan->max_duty = nvbios_rd08(bios, data + 0x03);
+
+ fan->pwm_freq = nvbios_rd32(bios, data + 0x0b) & 0xffffff;
+ }
+
+ return data;
+}