root/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/gf119.c

DEFINITIONS

1. gf119_gpio_reset
2. gf119_gpio_drive
3. gf119_gpio_sense
4. gf119_gpio_new

   1 /*
   2  * Copyright 2012 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 #include "priv.h"
  25 
  26 void
  27 gf119_gpio_reset(struct nvkm_gpio *gpio, u8 match)
  28 {
  29         struct nvkm_device *device = gpio->subdev.device;
  30         struct nvkm_bios *bios = device->bios;
  31         u8 ver, len;
  32         u16 entry;
  33         int ent = -1;
  34 
  35         while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
  36                 u32 data = nvbios_rd32(bios, entry);
  37                 u8  line =   (data & 0x0000003f);
  38                 u8  defs = !!(data & 0x00000080);
  39                 u8  func =   (data & 0x0000ff00) >> 8;
  40                 u8  unk0 =   (data & 0x00ff0000) >> 16;
  41                 u8  unk1 =   (data & 0x1f000000) >> 24;
  42 
  43                 if ( func  == DCB_GPIO_UNUSED ||
  44                     (match != DCB_GPIO_UNUSED && match != func))
  45                         continue;
  46 
  47                 nvkm_gpio_set(gpio, 0, func, line, defs);
  48 
  49                 nvkm_mask(device, 0x00d610 + (line * 4), 0xff, unk0);
  50                 if (unk1--)
  51                         nvkm_mask(device, 0x00d740 + (unk1 * 4), 0xff, line);
  52         }
  53 }
  54 
  55 int
  56 gf119_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
  57 {
  58         struct nvkm_device *device = gpio->subdev.device;
  59         u32 data = ((dir ^ 1) << 13) | (out << 12);
  60         nvkm_mask(device, 0x00d610 + (line * 4), 0x00003000, data);
  61         nvkm_mask(device, 0x00d604, 0x00000001, 0x00000001); /* update? */
  62         return 0;
  63 }
  64 
  65 int
  66 gf119_gpio_sense(struct nvkm_gpio *gpio, int line)
  67 {
  68         struct nvkm_device *device = gpio->subdev.device;
  69         return !!(nvkm_rd32(device, 0x00d610 + (line * 4)) & 0x00004000);
  70 }
  71 
  72 static const struct nvkm_gpio_func
  73 gf119_gpio = {
  74         .lines = 32,
  75         .intr_stat = g94_gpio_intr_stat,
  76         .intr_mask = g94_gpio_intr_mask,
  77         .drive = gf119_gpio_drive,
  78         .sense = gf119_gpio_sense,
  79         .reset = gf119_gpio_reset,
  80 };
  81 
  82 int
  83 gf119_gpio_new(struct nvkm_device *device, int index, struct nvkm_gpio **pgpio)
  84 {
  85         return nvkm_gpio_new_(&gf119_gpio, device, index, pgpio);
  86 }