LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/bios/pmu.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 <bskeggs@redhat.com>
  23 */
  24#include <subdev/bios.h>
  25#include <subdev/bios/bit.h>
  26#include <subdev/bios/image.h>
  27#include <subdev/bios/pmu.h>
  28
  29u32
  30nvbios_pmuTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
  31{
  32        struct bit_entry bit_p;
  33        u32 data = 0;
  34
  35        if (!bit_entry(bios, 'p', &bit_p)) {
  36                if (bit_p.version == 2 && bit_p.length >= 4)
  37                        data = nvbios_rd32(bios, bit_p.offset + 0x00);
  38                if (data) {
  39                        *ver = nvbios_rd08(bios, data + 0x00); /* maybe? */
  40                        *hdr = nvbios_rd08(bios, data + 0x01);
  41                        *len = nvbios_rd08(bios, data + 0x02);
  42                        *cnt = nvbios_rd08(bios, data + 0x03);
  43                }
  44        }
  45
  46        return data;
  47}
  48
  49u32
  50nvbios_pmuEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr)
  51{
  52        u8  cnt, len;
  53        u32 data = nvbios_pmuTe(bios, ver, hdr, &cnt, &len);
  54        if (data && idx < cnt) {
  55                data = data + *hdr + (idx * len);
  56                *hdr = len;
  57                return data;
  58        }
  59        return 0;
  60}
  61
  62u32
  63nvbios_pmuEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
  64             struct nvbios_pmuE *info)
  65{
  66        u32 data = nvbios_pmuEe(bios, idx, ver, hdr);
  67        memset(info, 0x00, sizeof(*info));
  68        switch (!!data * *ver) {
  69        default:
  70                info->type = nvbios_rd08(bios, data + 0x00);
  71                info->data = nvbios_rd32(bios, data + 0x02);
  72                break;
  73        }
  74        return data;
  75}
  76
  77bool
  78nvbios_pmuRm(struct nvkm_bios *bios, u8 type, struct nvbios_pmuR *info)
  79{
  80        struct nvbios_pmuE pmuE;
  81        u8  ver, hdr, idx = 0;
  82        u32 data;
  83        memset(info, 0x00, sizeof(*info));
  84        while ((data = nvbios_pmuEp(bios, idx++, &ver, &hdr, &pmuE))) {
  85                if (pmuE.type == type && (data = pmuE.data)) {
  86                        info->init_addr_pmu = nvbios_rd32(bios, data + 0x08);
  87                        info->args_addr_pmu = nvbios_rd32(bios, data + 0x0c);
  88                        info->boot_addr     = data + 0x30;
  89                        info->boot_addr_pmu = nvbios_rd32(bios, data + 0x10) +
  90                                              nvbios_rd32(bios, data + 0x18);
  91                        info->boot_size     = nvbios_rd32(bios, data + 0x1c) -
  92                                              nvbios_rd32(bios, data + 0x18);
  93                        info->code_addr     = info->boot_addr + info->boot_size;
  94                        info->code_addr_pmu = info->boot_addr_pmu +
  95                                              info->boot_size;
  96                        info->code_size     = nvbios_rd32(bios, data + 0x20);
  97                        info->data_addr     = data + 0x30 +
  98                                              nvbios_rd32(bios, data + 0x24);
  99                        info->data_addr_pmu = nvbios_rd32(bios, data + 0x28);
 100                        info->data_size     = nvbios_rd32(bios, data + 0x2c);
 101                        return true;
 102                }
 103        }
 104        return false;
 105}
 106