diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/base.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/base.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/base.c new file mode 100644 index 000000000000..8db204f92ed3 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/base.c @@ -0,0 +1,206 @@ +/* + * Copyright 2012 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Ben Skeggs + */ +#include "priv.h" + +#include <subdev/bios.h> +#include <subdev/bios/bmp.h> +#include <subdev/bios/bit.h> + +u8 +nvbios_checksum(const u8 *data, int size) +{ + u8 sum = 0; + while (size--) + sum += *data++; + return sum; +} + +u16 +nvbios_findstr(const u8 *data, int size, const char *str, int len) +{ + int i, j; + + for (i = 0; i <= (size - len); i++) { + for (j = 0; j < len; j++) + if ((char)data[i + j] != str[j]) + break; + if (j == len) + return i; + } + + return 0; +} + +int +nvbios_extend(struct nvkm_bios *bios, u32 length) +{ + if (bios->size < length) { + u8 *prev = bios->data; + if (!(bios->data = kmalloc(length, GFP_KERNEL))) { + bios->data = prev; + return -ENOMEM; + } + memcpy(bios->data, prev, bios->size); + bios->size = length; + kfree(prev); + return 1; + } + return 0; +} + +static u8 +nvkm_bios_rd08(struct nvkm_object *object, u64 addr) +{ + struct nvkm_bios *bios = (void *)object; + return bios->data[addr]; +} + +static u16 +nvkm_bios_rd16(struct nvkm_object *object, u64 addr) +{ + struct nvkm_bios *bios = (void *)object; + return get_unaligned_le16(&bios->data[addr]); +} + +static u32 +nvkm_bios_rd32(struct nvkm_object *object, u64 addr) +{ + struct nvkm_bios *bios = (void *)object; + return get_unaligned_le32(&bios->data[addr]); +} + +static void +nvkm_bios_wr08(struct nvkm_object *object, u64 addr, u8 data) +{ + struct nvkm_bios *bios = (void *)object; + bios->data[addr] = data; +} + +static void +nvkm_bios_wr16(struct nvkm_object *object, u64 addr, u16 data) +{ + struct nvkm_bios *bios = (void *)object; + put_unaligned_le16(data, &bios->data[addr]); +} + +static void +nvkm_bios_wr32(struct nvkm_object *object, u64 addr, u32 data) +{ + struct nvkm_bios *bios = (void *)object; + put_unaligned_le32(data, &bios->data[addr]); +} + +static int +nvkm_bios_ctor(struct nvkm_object *parent, struct nvkm_object *engine, + struct nvkm_oclass *oclass, void *data, u32 size, + struct nvkm_object **pobject) +{ + struct nvkm_bios *bios; + struct bit_entry bit_i; + int ret; + + ret = nvkm_subdev_create(parent, engine, oclass, 0, + "VBIOS", "bios", &bios); + *pobject = nv_object(bios); + if (ret) + return ret; + + ret = nvbios_shadow(bios); + if (ret) + return ret; + + /* detect type of vbios we're dealing with */ + bios->bmp_offset = nvbios_findstr(bios->data, bios->size, + "\xff\x7f""NV\0", 5); + if (bios->bmp_offset) { + nv_info(bios, "BMP version %x.%x\n", + bmp_version(bios) >> 8, + bmp_version(bios) & 0xff); + } + + bios->bit_offset = nvbios_findstr(bios->data, bios->size, + "\xff\xb8""BIT", 5); + if (bios->bit_offset) + nv_info(bios, "BIT signature found\n"); + + /* determine the vbios version number */ + if (!bit_entry(bios, 'i', &bit_i) && bit_i.length >= 4) { + bios->version.major = nv_ro08(bios, bit_i.offset + 3); + bios->version.chip = nv_ro08(bios, bit_i.offset + 2); + bios->version.minor = nv_ro08(bios, bit_i.offset + 1); + bios->version.micro = nv_ro08(bios, bit_i.offset + 0); + bios->version.patch = nv_ro08(bios, bit_i.offset + 4); + } else + if (bmp_version(bios)) { + bios->version.major = nv_ro08(bios, bios->bmp_offset + 13); + bios->version.chip = nv_ro08(bios, bios->bmp_offset + 12); + bios->version.minor = nv_ro08(bios, bios->bmp_offset + 11); + bios->version.micro = nv_ro08(bios, bios->bmp_offset + 10); + } + + nv_info(bios, "version %02x.%02x.%02x.%02x.%02x\n", + bios->version.major, bios->version.chip, + bios->version.minor, bios->version.micro, bios->version.patch); + + return 0; +} + +static void +nvkm_bios_dtor(struct nvkm_object *object) +{ + struct nvkm_bios *bios = (void *)object; + kfree(bios->data); + nvkm_subdev_destroy(&bios->base); +} + +static int +nvkm_bios_init(struct nvkm_object *object) +{ + struct nvkm_bios *bios = (void *)object; + return nvkm_subdev_init(&bios->base); +} + +static int +nvkm_bios_fini(struct nvkm_object *object, bool suspend) +{ + struct nvkm_bios *bios = (void *)object; + return nvkm_subdev_fini(&bios->base, suspend); +} + +struct nvkm_oclass +nvkm_bios_oclass = { + .handle = NV_SUBDEV(VBIOS, 0x00), + .ofuncs = &(struct nvkm_ofuncs) { + .ctor = nvkm_bios_ctor, + .dtor = nvkm_bios_dtor, + .init = nvkm_bios_init, + .fini = nvkm_bios_fini, + .rd08 = nvkm_bios_rd08, + .rd16 = nvkm_bios_rd16, + .rd32 = nvkm_bios_rd32, + .wr08 = nvkm_bios_wr08, + .wr16 = nvkm_bios_wr16, + .wr32 = nvkm_bios_wr32, + }, +}; |