LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/gpio/ga102.c

   1/*
   2 * Copyright 2021 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#include "priv.h"
  23
  24static void
  25ga102_gpio_reset(struct nvkm_gpio *gpio, u8 match)
  26{
  27        struct nvkm_device *device = gpio->subdev.device;
  28        struct nvkm_bios *bios = device->bios;
  29        u8 ver, len;
  30        u16 entry;
  31        int ent = -1;
  32
  33        while ((entry = dcb_gpio_entry(bios, 0, ++ent, &ver, &len))) {
  34                u32 data = nvbios_rd32(bios, entry);
  35                u8  line =   (data & 0x0000003f);
  36                u8  defs = !!(data & 0x00000080);
  37                u8  func =   (data & 0x0000ff00) >> 8;
  38                u8  unk0 =   (data & 0x00ff0000) >> 16;
  39                u8  unk1 =   (data & 0x1f000000) >> 24;
  40
  41                if ( func  == DCB_GPIO_UNUSED ||
  42                    (match != DCB_GPIO_UNUSED && match != func))
  43                        continue;
  44
  45                nvkm_gpio_set(gpio, 0, func, line, defs);
  46
  47                nvkm_mask(device, 0x021200 + (line * 4), 0xff, unk0);
  48                if (unk1--)
  49                        nvkm_mask(device, 0x00d740 + (unk1 * 4), 0xff, line);
  50        }
  51}
  52
  53static int
  54ga102_gpio_drive(struct nvkm_gpio *gpio, int line, int dir, int out)
  55{
  56        struct nvkm_device *device = gpio->subdev.device;
  57        u32 data = ((dir ^ 1) << 13) | (out << 12);
  58        nvkm_mask(device, 0x021200 + (line * 4), 0x00003000, data);
  59        nvkm_mask(device, 0x00d604, 0x00000001, 0x00000001); /* update? */
  60        return 0;
  61}
  62
  63static int
  64ga102_gpio_sense(struct nvkm_gpio *gpio, int line)
  65{
  66        struct nvkm_device *device = gpio->subdev.device;
  67        return !!(nvkm_rd32(device, 0x021200 + (line * 4)) & 0x00004000);
  68}
  69
  70static void
  71ga102_gpio_intr_stat(struct nvkm_gpio *gpio, u32 *hi, u32 *lo)
  72{
  73        struct nvkm_device *device = gpio->subdev.device;
  74        u32 intr0 = nvkm_rd32(device, 0x021640);
  75        u32 intr1 = nvkm_rd32(device, 0x02164c);
  76        u32 stat0 = nvkm_rd32(device, 0x021648) & intr0;
  77        u32 stat1 = nvkm_rd32(device, 0x021654) & intr1;
  78        *lo = (stat1 & 0xffff0000) | (stat0 >> 16);
  79        *hi = (stat1 << 16) | (stat0 & 0x0000ffff);
  80        nvkm_wr32(device, 0x021640, intr0);
  81        nvkm_wr32(device, 0x02164c, intr1);
  82}
  83
  84static void
  85ga102_gpio_intr_mask(struct nvkm_gpio *gpio, u32 type, u32 mask, u32 data)
  86{
  87        struct nvkm_device *device = gpio->subdev.device;
  88        u32 inte0 = nvkm_rd32(device, 0x021648);
  89        u32 inte1 = nvkm_rd32(device, 0x021654);
  90        if (type & NVKM_GPIO_LO)
  91                inte0 = (inte0 & ~(mask << 16)) | (data << 16);
  92        if (type & NVKM_GPIO_HI)
  93                inte0 = (inte0 & ~(mask & 0xffff)) | (data & 0xffff);
  94        mask >>= 16;
  95        data >>= 16;
  96        if (type & NVKM_GPIO_LO)
  97                inte1 = (inte1 & ~(mask << 16)) | (data << 16);
  98        if (type & NVKM_GPIO_HI)
  99                inte1 = (inte1 & ~mask) | data;
 100        nvkm_wr32(device, 0x021648, inte0);
 101        nvkm_wr32(device, 0x021654, inte1);
 102}
 103
 104static const struct nvkm_gpio_func
 105ga102_gpio = {
 106        .lines = 32,
 107        .intr_stat = ga102_gpio_intr_stat,
 108        .intr_mask = ga102_gpio_intr_mask,
 109        .drive = ga102_gpio_drive,
 110        .sense = ga102_gpio_sense,
 111        .reset = ga102_gpio_reset,
 112};
 113
 114int
 115ga102_gpio_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
 116               struct nvkm_gpio **pgpio)
 117{
 118        return nvkm_gpio_new_(&ga102_gpio, device, type, inst, pgpio);
 119}
 120