251 lines
6.1 KiB
C
251 lines
6.1 KiB
C
/*
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* Copyright 2010 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#include <drm/drmP.h>
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#include "nouveau_drm.h"
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#include "nouveau_pm.h"
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#include <subdev/bios/gpio.h>
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#include <subdev/gpio.h>
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static const enum dcb_gpio_func_name vidtag[] = { 0x04, 0x05, 0x06, 0x1a, 0x73 };
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static int nr_vidtag = sizeof(vidtag) / sizeof(vidtag[0]);
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int
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nouveau_voltage_gpio_get(struct drm_device *dev)
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{
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struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
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struct nouveau_device *device = nouveau_dev(dev);
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struct nouveau_gpio *gpio = nouveau_gpio(device);
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u8 vid = 0;
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int i;
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for (i = 0; i < nr_vidtag; i++) {
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if (!(volt->vid_mask & (1 << i)))
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continue;
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vid |= gpio->get(gpio, 0, vidtag[i], 0xff) << i;
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}
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return nouveau_volt_lvl_lookup(dev, vid);
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}
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int
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nouveau_voltage_gpio_set(struct drm_device *dev, int voltage)
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{
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struct nouveau_device *device = nouveau_dev(dev);
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struct nouveau_gpio *gpio = nouveau_gpio(device);
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struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
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int vid, i;
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vid = nouveau_volt_vid_lookup(dev, voltage);
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if (vid < 0)
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return vid;
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for (i = 0; i < nr_vidtag; i++) {
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if (!(volt->vid_mask & (1 << i)))
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continue;
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gpio->set(gpio, 0, vidtag[i], 0xff, !!(vid & (1 << i)));
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}
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return 0;
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}
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int
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nouveau_volt_vid_lookup(struct drm_device *dev, int voltage)
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{
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struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
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int i;
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for (i = 0; i < volt->nr_level; i++) {
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if (volt->level[i].voltage == voltage)
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return volt->level[i].vid;
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}
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return -ENOENT;
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}
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int
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nouveau_volt_lvl_lookup(struct drm_device *dev, int vid)
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{
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struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
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int i;
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for (i = 0; i < volt->nr_level; i++) {
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if (volt->level[i].vid == vid)
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return volt->level[i].voltage;
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}
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return -ENOENT;
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}
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void
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nouveau_volt_init(struct drm_device *dev)
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{
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struct nouveau_drm *drm = nouveau_drm(dev);
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struct nouveau_gpio *gpio = nouveau_gpio(drm->device);
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struct nouveau_pm *pm = nouveau_pm(dev);
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struct nouveau_pm_voltage *voltage = &pm->voltage;
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struct nvbios *bios = &drm->vbios;
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struct dcb_gpio_func func;
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struct bit_entry P;
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u8 *volt = NULL, *entry;
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int i, headerlen, recordlen, entries, vidmask, vidshift;
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if (bios->type == NVBIOS_BIT) {
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if (bit_table(dev, 'P', &P))
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return;
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if (P.version == 1)
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volt = ROMPTR(dev, P.data[16]);
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else
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if (P.version == 2)
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volt = ROMPTR(dev, P.data[12]);
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else {
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NV_WARN(drm, "unknown volt for BIT P %d\n", P.version);
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}
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} else {
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if (bios->data[bios->offset + 6] < 0x27) {
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NV_DEBUG(drm, "BMP version too old for voltage\n");
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return;
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}
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volt = ROMPTR(dev, bios->data[bios->offset + 0x98]);
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}
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if (!volt) {
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NV_DEBUG(drm, "voltage table pointer invalid\n");
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return;
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}
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switch (volt[0]) {
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case 0x10:
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case 0x11:
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case 0x12:
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headerlen = 5;
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recordlen = volt[1];
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entries = volt[2];
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vidshift = 0;
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vidmask = volt[4];
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break;
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case 0x20:
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headerlen = volt[1];
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recordlen = volt[3];
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entries = volt[2];
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vidshift = 0; /* could be vidshift like 0x30? */
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vidmask = volt[5];
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break;
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case 0x30:
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headerlen = volt[1];
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recordlen = volt[2];
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entries = volt[3];
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vidmask = volt[4];
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/* no longer certain what volt[5] is, if it's related to
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* the vid shift then it's definitely not a function of
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* how many bits are set.
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*
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* after looking at a number of nva3+ vbios images, they
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* all seem likely to have a static shift of 2.. lets
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* go with that for now until proven otherwise.
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*/
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vidshift = 2;
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break;
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case 0x40:
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headerlen = volt[1];
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recordlen = volt[2];
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entries = volt[3]; /* not a clue what the entries are for.. */
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vidmask = volt[11]; /* guess.. */
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vidshift = 0;
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break;
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default:
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NV_WARN(drm, "voltage table 0x%02x unknown\n", volt[0]);
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return;
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}
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/* validate vid mask */
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voltage->vid_mask = vidmask;
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if (!voltage->vid_mask)
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return;
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i = 0;
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while (vidmask) {
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if (i > nr_vidtag) {
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NV_DEBUG(drm, "vid bit %d unknown\n", i);
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return;
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}
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if (gpio && gpio->find(gpio, 0, vidtag[i], 0xff, &func)) {
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NV_DEBUG(drm, "vid bit %d has no gpio tag\n", i);
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return;
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}
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vidmask >>= 1;
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i++;
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}
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/* parse vbios entries into common format */
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voltage->version = volt[0];
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if (voltage->version < 0x40) {
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voltage->nr_level = entries;
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voltage->level =
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kcalloc(entries, sizeof(*voltage->level), GFP_KERNEL);
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if (!voltage->level)
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return;
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entry = volt + headerlen;
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for (i = 0; i < entries; i++, entry += recordlen) {
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voltage->level[i].voltage = entry[0] * 10000;
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voltage->level[i].vid = entry[1] >> vidshift;
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}
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} else {
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u32 volt_uv = ROM32(volt[4]);
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s16 step_uv = ROM16(volt[8]);
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u8 vid;
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voltage->nr_level = voltage->vid_mask + 1;
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voltage->level = kcalloc(voltage->nr_level,
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sizeof(*voltage->level), GFP_KERNEL);
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if (!voltage->level)
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return;
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for (vid = 0; vid <= voltage->vid_mask; vid++) {
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voltage->level[vid].voltage = volt_uv;
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voltage->level[vid].vid = vid;
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volt_uv += step_uv;
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}
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}
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voltage->supported = true;
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}
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void
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nouveau_volt_fini(struct drm_device *dev)
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{
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struct nouveau_pm_voltage *volt = &nouveau_pm(dev)->voltage;
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kfree(volt->level);
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}
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