/* * 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 "drmP.h" #include "nouveau_drv.h" #include "nouveau_pm.h" static const enum dcb_gpio_tag 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 drm_nouveau_private *dev_priv = dev->dev_private; struct nouveau_gpio_engine *gpio = &dev_priv->engine.gpio; struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.voltage; u8 vid = 0; int i; for (i = 0; i < nr_vidtag; i++) { if (!(volt->vid_mask & (1 << i))) continue; vid |= gpio->get(dev, vidtag[i]) << i; } return nouveau_volt_lvl_lookup(dev, vid); } int nouveau_voltage_gpio_set(struct drm_device *dev, int voltage) { struct drm_nouveau_private *dev_priv = dev->dev_private; struct nouveau_gpio_engine *gpio = &dev_priv->engine.gpio; struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.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(dev, vidtag[i], !!(vid & (1 << i))); } return 0; } int nouveau_volt_vid_lookup(struct drm_device *dev, int voltage) { struct drm_nouveau_private *dev_priv = dev->dev_private; struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.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 drm_nouveau_private *dev_priv = dev->dev_private; struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.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 drm_nouveau_private *dev_priv = dev->dev_private; struct nouveau_pm_engine *pm = &dev_priv->engine.pm; struct nouveau_pm_voltage *voltage = &pm->voltage; struct nvbios *bios = &dev_priv->vbios; 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(bios, P.data[16]); else if (P.version == 2) volt = ROMPTR(bios, P.data[12]); else { NV_WARN(dev, "unknown volt for BIT P %d\n", P.version); } } else { if (bios->data[bios->offset + 6] < 0x27) { NV_DEBUG(dev, "BMP version too old for voltage\n"); return; } volt = ROMPTR(bios, bios->data[bios->offset + 0x98]); } if (!volt) { NV_DEBUG(dev, "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(dev, "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(dev, "vid bit %d unknown\n", i); return; } if (!nouveau_bios_gpio_entry(dev, vidtag[i])) { NV_DEBUG(dev, "vid bit %d has no gpio tag\n", i); return; } vidmask >>= 1; i++; } /* parse vbios entries into common format */ if (volt[0] < 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 drm_nouveau_private *dev_priv = dev->dev_private; struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.voltage; kfree(volt->level); }