drivers/gpu/drm/nouveau/nvkm/subdev/i2c/padgm200.c

   1 /*
   2  * Copyright 2014 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 "pad.h"
  25 #include "aux.h"
  26 #include "bus.h"
  27
  28 static void
  29 gm200_i2c_pad_mode(struct nvkm_i2c_pad *pad, enum nvkm_i2c_pad_mode mode)
  30 {
  31         struct nvkm_subdev *subdev = &pad->i2c->subdev;
  32         struct nvkm_device *device = subdev->device;
  33         const u32 base = (pad->id - NVKM_I2C_PAD_HYBRID(0)) * 0x50;
  34
  35         switch (mode) {
  36         case NVKM_I2C_PAD_OFF:
  37                 nvkm_mask(device, 0x00d97c + base, 0x00000001, 0x00000001);
  38                 break;
  39         case NVKM_I2C_PAD_I2C:
  40                 nvkm_mask(device, 0x00d970 + base, 0x0000c003, 0x0000c001);
  41                 nvkm_mask(device, 0x00d97c + base, 0x00000001, 0x00000000);
  42                 break;
  43         case NVKM_I2C_PAD_AUX:
  44                 nvkm_mask(device, 0x00d970 + base, 0x0000c003, 0x00000002);
  45                 nvkm_mask(device, 0x00d97c + base, 0x00000001, 0x00000000);
  46                 break;
  47         default:
  48                 WARN_ON(1);
  49                 break;
  50         }
  51 }
  52
  53 static const struct nvkm_i2c_pad_func
  54 gm200_i2c_pad_s_func = {
  55         .bus_new_4 = gf119_i2c_bus_new,
  56         .aux_new_6 = gm200_i2c_aux_new,
  57         .mode = gm200_i2c_pad_mode,
  58 };
  59
  60 int
  61 gm200_i2c_pad_s_new(struct nvkm_i2c *i2c, int id, struct nvkm_i2c_pad **ppad)
  62 {
  63         return nvkm_i2c_pad_new_(&gm200_i2c_pad_s_func, i2c, id, ppad);
  64 }
  65
  66 static const struct nvkm_i2c_pad_func
  67 gm200_i2c_pad_x_func = {
  68         .bus_new_4 = gf119_i2c_bus_new,
  69         .aux_new_6 = gm200_i2c_aux_new,
  70 };
  71
  72 int
  73 gm200_i2c_pad_x_new(struct nvkm_i2c *i2c, int id, struct nvkm_i2c_pad **ppad)
  74 {
  75         return nvkm_i2c_pad_new_(&gm200_i2c_pad_x_func, i2c, id, ppad);
  76 }