mirror of https://gitee.com/openkylin/linux.git
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
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* Copyright (C) 2009 Francisco Jerez.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include "drmP.h"
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#include "nouveau_drv.h"
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#include "nouveau_hw.h"
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static bool
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get_gpio_location(struct dcb_gpio_entry *ent, uint32_t *reg, uint32_t *shift,
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uint32_t *mask)
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{
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if (ent->line < 2) {
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*reg = NV_PCRTC_GPIO;
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*shift = ent->line * 16;
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*mask = 0x11;
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} else if (ent->line < 10) {
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*reg = NV_PCRTC_GPIO_EXT;
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*shift = (ent->line - 2) * 4;
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*mask = 0x3;
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} else if (ent->line < 14) {
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*reg = NV_PCRTC_850;
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*shift = (ent->line - 10) * 4;
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*mask = 0x3;
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} else {
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return false;
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}
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return true;
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}
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int
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nv10_gpio_get(struct drm_device *dev, enum dcb_gpio_tag tag)
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{
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struct dcb_gpio_entry *ent = nouveau_bios_gpio_entry(dev, tag);
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uint32_t reg, shift, mask, value;
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if (!ent)
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return -ENODEV;
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if (!get_gpio_location(ent, ®, &shift, &mask))
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return -ENODEV;
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value = NVReadCRTC(dev, 0, reg) >> shift;
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return (ent->invert ? 1 : 0) ^ (value & 1);
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}
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int
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nv10_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state)
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{
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struct dcb_gpio_entry *ent = nouveau_bios_gpio_entry(dev, tag);
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uint32_t reg, shift, mask, value;
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if (!ent)
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return -ENODEV;
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if (!get_gpio_location(ent, ®, &shift, &mask))
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return -ENODEV;
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value = ((ent->invert ? 1 : 0) ^ (state ? 1 : 0)) << shift;
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mask = ~(mask << shift);
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NVWriteCRTC(dev, 0, reg, value | (NVReadCRTC(dev, 0, reg) & mask));
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return 0;
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}
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