LXR linux/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
  28static int
  29nv10_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
  51static int
  52nv10_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
  82static void
  83nv10_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
  93static void
  94nv10_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
 105static const struct nvkm_gpio_func
 106nv10_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
 114int
 115nv10_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
 116              struct nvkm_gpio **pgpio)
 117{
 118        return nvkm_gpio_new_(&nv10_gpio, device, type, inst, pgpio);
 119}
 120