2 * Copyright 2012 Red Hat Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
26 #include <subdev/bios.h>
27 #include <subdev/bios/bmp.h>
28 #include <subdev/bios/bit.h>
31 nvbios_addr(struct nvkm_bios *bios, u32 *addr, u8 size)
33 if (unlikely(*addr + size >= bios->size)) {
34 nvkm_error(&bios->subdev, "OOB %d %08x\n", size, *addr);
41 nvbios_rd08(struct nvkm_bios *bios, u32 addr)
43 if (likely(nvbios_addr(bios, &addr, 1)))
44 return bios->data[addr];
49 nvbios_rd16(struct nvkm_bios *bios, u32 addr)
51 if (likely(nvbios_addr(bios, &addr, 2)))
52 return get_unaligned_le16(&bios->data[addr]);
57 nvbios_rd32(struct nvkm_bios *bios, u32 addr)
59 if (likely(nvbios_addr(bios, &addr, 4)))
60 return get_unaligned_le32(&bios->data[addr]);
65 nvbios_checksum(const u8 *data, int size)
74 nvbios_findstr(const u8 *data, int size, const char *str, int len)
78 for (i = 0; i <= (size - len); i++) {
79 for (j = 0; j < len; j++)
80 if ((char)data[i + j] != str[j])
90 nvbios_memcmp(struct nvkm_bios *bios, u32 addr, const char *str, u32 len)
95 c1 = nvbios_rd08(bios, addr++);
104 nvbios_extend(struct nvkm_bios *bios, u32 length)
106 if (bios->size < length) {
107 u8 *prev = bios->data;
108 if (!(bios->data = kmalloc(length, GFP_KERNEL))) {
112 memcpy(bios->data, prev, bios->size);
121 nvkm_bios_dtor(struct nvkm_subdev *subdev)
123 struct nvkm_bios *bios = nvkm_bios(subdev);
128 static const struct nvkm_subdev_func
130 .dtor = nvkm_bios_dtor,
134 nvkm_bios_new(struct nvkm_device *device, int index, struct nvkm_bios **pbios)
136 struct nvkm_bios *bios;
137 struct bit_entry bit_i;
140 if (!(bios = *pbios = kzalloc(sizeof(*bios), GFP_KERNEL)))
142 nvkm_subdev_ctor(&nvkm_bios, device, index, &bios->subdev);
144 ret = nvbios_shadow(bios);
148 /* detect type of vbios we're dealing with */
149 bios->bmp_offset = nvbios_findstr(bios->data, bios->size,
150 "\xff\x7f""NV\0", 5);
151 if (bios->bmp_offset) {
152 nvkm_debug(&bios->subdev, "BMP version %x.%x\n",
153 bmp_version(bios) >> 8,
154 bmp_version(bios) & 0xff);
157 bios->bit_offset = nvbios_findstr(bios->data, bios->size,
159 if (bios->bit_offset)
160 nvkm_debug(&bios->subdev, "BIT signature found\n");
162 /* determine the vbios version number */
163 if (!bit_entry(bios, 'i', &bit_i) && bit_i.length >= 4) {
164 bios->version.major = nvbios_rd08(bios, bit_i.offset + 3);
165 bios->version.chip = nvbios_rd08(bios, bit_i.offset + 2);
166 bios->version.minor = nvbios_rd08(bios, bit_i.offset + 1);
167 bios->version.micro = nvbios_rd08(bios, bit_i.offset + 0);
168 bios->version.patch = nvbios_rd08(bios, bit_i.offset + 4);
170 if (bmp_version(bios)) {
171 bios->version.major = nvbios_rd08(bios, bios->bmp_offset + 13);
172 bios->version.chip = nvbios_rd08(bios, bios->bmp_offset + 12);
173 bios->version.minor = nvbios_rd08(bios, bios->bmp_offset + 11);
174 bios->version.micro = nvbios_rd08(bios, bios->bmp_offset + 10);
177 nvkm_info(&bios->subdev, "version %02x.%02x.%02x.%02x.%02x\n",
178 bios->version.major, bios->version.chip,
179 bios->version.minor, bios->version.micro, bios->version.patch);