drivers/gpu/drm/nouveau/nvkm/subdev/gpio/nv10.c

   1 /*
   2  * Copyright (C) 2009 Francisco Jerez.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26 #include "priv.h"
  27
  28 static int
  29 nv10_gpio_sense(struct nvkm_gpio *gpio, int line)
  30 {
  31         struct nvkm_device *device = gpio->subdev.device;
  32         if (line < 2) {
  33                 line = line * 16;
  34                 line = nvkm_rd32(device, 0x600818) >> line;
  35                 return !!(line & 0x0100);
  36         } else
  37         if (line < 10) {
  38                 line = (line - 2) * 4;
  39                 line = nvkm_rd32(device, 0x60081c) >> line;
  40                 return !!(line & 0x04);
  41         } else
  42         if (line < 14) {
  43                 line = (line - 10) * 4;
  44                 line = nvkm_rd32(device, 0x600850) >> line;
  45                 return !!(line & 0x04);
  46         }
  47
  48         return -EINVAL;
  49 }
  50
  51 static int
  52 nv10_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
  53 {
  54         struct nvkm_device *device = gpio->subdev.device;
  55         u32 reg, mask, data;
  56
  57         if (line < 2) {
  58                 line = line * 16;
  59                 reg  = 0x600818;
  60                 mask = 0x00000011;
  61                 data = (dir << 4) | out;
  62         } else
  63         if (line < 10) {
  64                 line = (line - 2) * 4;
  65                 reg  = 0x60081c;
  66                 mask = 0x00000003;
  67                 data = (dir << 1) | out;
  68         } else
  69         if (line < 14) {
  70                 line = (line - 10) * 4;
  71                 reg  = 0x600850;
  72                 mask = 0x00000003;
  73                 data = (dir << 1) | out;
  74         } else {
  75                 return -EINVAL;
  76         }
  77
  78         nvkm_mask(device, reg, mask << line, data << line);
  79         return 0;
  80 }
  81
  82 static void
  83 nv10_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)
  84 {
  85         struct nvkm_device *device = gpio->subdev.device;
  86         u32 intr = nvkm_rd32(device, 0x001104);
  87         u32 stat = nvkm_rd32(device, 0x001144) & intr;
  88         *lo = (stat & 0xffff0000) >> 16;
  89         *hi = (stat & 0x0000ffff);
  90         nvkm_wr32(device, 0x001104, intr);
  91 }
  92
  93 static void
  94 nv10_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)
  95 {
  96         struct nvkm_device *device = gpio->subdev.device;
  97         u32 inte = nvkm_rd32(device, 0x001144);
  98         if (type & NVKM_GPIO_LO)
  99                 inte = (inte & ~(mask << 16)) | (data << 16);
 100         if (type & NVKM_GPIO_HI)
 101                 inte = (inte & ~mask) | data;
 102         nvkm_wr32(device, 0x001144, inte);
 103 }
 104
 105 static const struct nvkm_gpio_func
 106 nv10_gpio = {
 107         .lines = 16,
 108         .intr_stat = nv10_gpio_intr_stat,
 109         .intr_mask = nv10_gpio_intr_mask,
 110         .drive = nv10_gpio_drive,
 111         .sense = nv10_gpio_sense,
 112 };
 113
 114 int
 115 nv10_gpio_new(struct nvkm_device *device, int index, struct nvkm_gpio **pgpio)
 116 {
 117         return nvkm_gpio_new_(&nv10_gpio, device, index, pgpio);
 118 }