1/* 2 * Copyright 2010 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Ben Skeggs 23 */ 24 25#include "drmP.h" 26#include "nouveau_drv.h" 27#include "nouveau_hw.h" 28 29static int 30nv50_gpio_location(struct dcb_gpio_entry *gpio, uint32_t *reg, uint32_t *shift) 31{ 32 const uint32_t nv50_gpio_reg[4] = { 0xe104, 0xe108, 0xe280, 0xe284 }; 33 34 if (gpio->line >= 32) 35 return -EINVAL; 36 37 *reg = nv50_gpio_reg[gpio->line >> 3]; 38 *shift = (gpio->line & 7) << 2; 39 return 0; 40} 41 42int 43nv50_gpio_get(struct drm_device *dev, enum dcb_gpio_tag tag) 44{ 45 struct dcb_gpio_entry *gpio; 46 uint32_t r, s, v; 47 48 gpio = nouveau_bios_gpio_entry(dev, tag); 49 if (!gpio) 50 return -ENOENT; 51 52 if (nv50_gpio_location(gpio, &r, &s)) 53 return -EINVAL; 54 55 v = nv_rd32(dev, r) >> (s + 2); 56 return ((v & 1) == (gpio->state[1] & 1)); 57} 58 59int 60nv50_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state) 61{ 62 struct dcb_gpio_entry *gpio; 63 uint32_t r, s, v; 64 65 gpio = nouveau_bios_gpio_entry(dev, tag); 66 if (!gpio) 67 return -ENOENT; 68 69 if (nv50_gpio_location(gpio, &r, &s)) 70 return -EINVAL; 71 72 v = nv_rd32(dev, r) & ~(0x3 << s); 73 v |= (gpio->state[state] ^ 2) << s; 74 nv_wr32(dev, r, v); 75 return 0; 76} 77 78void 79nv50_gpio_irq_enable(struct drm_device *dev, enum dcb_gpio_tag tag, bool on) 80{ 81 struct dcb_gpio_entry *gpio; 82 u32 reg, mask; 83 84 gpio = nouveau_bios_gpio_entry(dev, tag); 85 if (!gpio) { 86 NV_ERROR(dev, "gpio tag 0x%02x not found\n", tag); 87 return; 88 } 89 90 reg = gpio->line < 16 ? 0xe050 : 0xe070; 91 mask = 0x00010001 << (gpio->line & 0xf); 92 93 nv_wr32(dev, reg + 4, mask); 94 nv_mask(dev, reg + 0, mask, on ? mask : 0); 95} 96 97int 98nv50_gpio_init(struct drm_device *dev) 99{ 100 struct drm_nouveau_private *dev_priv = dev->dev_private; 101 102 /* disable, and ack any pending gpio interrupts */ 103 nv_wr32(dev, 0xe050, 0x00000000); 104 nv_wr32(dev, 0xe054, 0xffffffff); 105 if (dev_priv->chipset >= 0x90) { 106 nv_wr32(dev, 0xe070, 0x00000000); 107 nv_wr32(dev, 0xe074, 0xffffffff); 108 } 109 110 return 0; 111} 112