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path: root/drivers/gpu/drm/nouveau/nouveau_volt.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_volt.c')
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_volt.c250
1 files changed, 0 insertions, 250 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_volt.c b/drivers/gpu/drm/nouveau/nouveau_volt.c
deleted file mode 100644
index 9976414cbe50..000000000000
--- a/drivers/gpu/drm/nouveau/nouveau_volt.c
+++ /dev/null
@@ -1,250 +0,0 @@
-/*
- * Copyright 2010 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 <drm/drmP.h>
-
-#include "nouveau_drm.h"
-#include "nouveau_pm.h"
-
-#include <subdev/bios/gpio.h>
-#include <subdev/gpio.h>
-
-static const enum dcb_gpio_func_name vidtag[] = { 0x04, 0x05, 0x06, 0x1a, 0x73 };
-static int nr_vidtag = sizeof(vidtag) / sizeof(vidtag[0]);
-
-int
-nouveau_voltage_gpio_get(struct drm_device *dev)
-{
- struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
- struct nouveau_device *device = nouveau_dev(dev);
- struct nouveau_gpio *gpio = nouveau_gpio(device);
- u8 vid = 0;
- int i;
-
- for (i = 0; i < nr_vidtag; i++) {
- if (!(volt->vid_mask & (1 << i)))
- continue;
-
- vid |= gpio->get(gpio, 0, vidtag[i], 0xff) << i;
- }
-
- return nouveau_volt_lvl_lookup(dev, vid);
-}
-
-int
-nouveau_voltage_gpio_set(struct drm_device *dev, int voltage)
-{
- struct nouveau_device *device = nouveau_dev(dev);
- struct nouveau_gpio *gpio = nouveau_gpio(device);
- struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
- int vid, i;
-
- vid = nouveau_volt_vid_lookup(dev, voltage);
- if (vid < 0)
- return vid;
-
- for (i = 0; i < nr_vidtag; i++) {
- if (!(volt->vid_mask & (1 << i)))
- continue;
-
- gpio->set(gpio, 0, vidtag[i], 0xff, !!(vid & (1 << i)));
- }
-
- return 0;
-}
-
-int
-nouveau_volt_vid_lookup(struct drm_device *dev, int voltage)
-{
- struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
- int i;
-
- for (i = 0; i < volt->nr_level; i++) {
- if (volt->level[i].voltage == voltage)
- return volt->level[i].vid;
- }
-
- return -ENOENT;
-}
-
-int
-nouveau_volt_lvl_lookup(struct drm_device *dev, int vid)
-{
- struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
- int i;
-
- for (i = 0; i < volt->nr_level; i++) {
- if (volt->level[i].vid == vid)
- return volt->level[i].voltage;
- }
-
- return -ENOENT;
-}
-
-void
-nouveau_volt_init(struct drm_device *dev)
-{
- struct nouveau_drm *drm = nouveau_drm(dev);
- struct nouveau_gpio *gpio = nouveau_gpio(drm->device);
- struct nouveau_pm *pm = nouveau_pm(dev);
- struct nouveau_pm_voltage *voltage = &pm->voltage;
- struct nvbios *bios = &drm->vbios;
- struct dcb_gpio_func func;
- struct bit_entry P;
- u8 *volt = NULL, *entry;
- int i, headerlen, recordlen, entries, vidmask, vidshift;
-
- if (bios->type == NVBIOS_BIT) {
- if (bit_table(dev, 'P', &P))
- return;
-
- if (P.version == 1)
- volt = ROMPTR(dev, P.data[16]);
- else
- if (P.version == 2)
- volt = ROMPTR(dev, P.data[12]);
- else {
- NV_WARN(drm, "unknown volt for BIT P %d\n", P.version);
- }
- } else {
- if (bios->data[bios->offset + 6] < 0x27) {
- NV_DEBUG(drm, "BMP version too old for voltage\n");
- return;
- }
-
- volt = ROMPTR(dev, bios->data[bios->offset + 0x98]);
- }
-
- if (!volt) {
- NV_DEBUG(drm, "voltage table pointer invalid\n");
- return;
- }
-
- switch (volt[0]) {
- case 0x10:
- case 0x11:
- case 0x12:
- headerlen = 5;
- recordlen = volt[1];
- entries = volt[2];
- vidshift = 0;
- vidmask = volt[4];
- break;
- case 0x20:
- headerlen = volt[1];
- recordlen = volt[3];
- entries = volt[2];
- vidshift = 0; /* could be vidshift like 0x30? */
- vidmask = volt[5];
- break;
- case 0x30:
- headerlen = volt[1];
- recordlen = volt[2];
- entries = volt[3];
- vidmask = volt[4];
- /* no longer certain what volt[5] is, if it's related to
- * the vid shift then it's definitely not a function of
- * how many bits are set.
- *
- * after looking at a number of nva3+ vbios images, they
- * all seem likely to have a static shift of 2.. lets
- * go with that for now until proven otherwise.
- */
- vidshift = 2;
- break;
- case 0x40:
- headerlen = volt[1];
- recordlen = volt[2];
- entries = volt[3]; /* not a clue what the entries are for.. */
- vidmask = volt[11]; /* guess.. */
- vidshift = 0;
- break;
- default:
- NV_WARN(drm, "voltage table 0x%02x unknown\n", volt[0]);
- return;
- }
-
- /* validate vid mask */
- voltage->vid_mask = vidmask;
- if (!voltage->vid_mask)
- return;
-
- i = 0;
- while (vidmask) {
- if (i > nr_vidtag) {
- NV_DEBUG(drm, "vid bit %d unknown\n", i);
- return;
- }
-
- if (gpio && gpio->find(gpio, 0, vidtag[i], 0xff, &func)) {
- NV_DEBUG(drm, "vid bit %d has no gpio tag\n", i);
- return;
- }
-
- vidmask >>= 1;
- i++;
- }
-
- /* parse vbios entries into common format */
- voltage->version = volt[0];
- if (voltage->version < 0x40) {
- voltage->nr_level = entries;
- voltage->level =
- kcalloc(entries, sizeof(*voltage->level), GFP_KERNEL);
- if (!voltage->level)
- return;
-
- entry = volt + headerlen;
- for (i = 0; i < entries; i++, entry += recordlen) {
- voltage->level[i].voltage = entry[0] * 10000;
- voltage->level[i].vid = entry[1] >> vidshift;
- }
- } else {
- u32 volt_uv = ROM32(volt[4]);
- s16 step_uv = ROM16(volt[8]);
- u8 vid;
-
- voltage->nr_level = voltage->vid_mask + 1;
- voltage->level = kcalloc(voltage->nr_level,
- sizeof(*voltage->level), GFP_KERNEL);
- if (!voltage->level)
- return;
-
- for (vid = 0; vid <= voltage->vid_mask; vid++) {
- voltage->level[vid].voltage = volt_uv;
- voltage->level[vid].vid = vid;
- volt_uv += step_uv;
- }
- }
-
- voltage->supported = true;
-}
-
-void
-nouveau_volt_fini(struct drm_device *dev)
-{
- struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
-
- kfree(volt->level);
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.