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_checksum(const u8 *data, int size)
40 nvbios_findstr(const u8 *data, int size, const char *str, int len)
44 for (i = 0; i <= (size - len); i++) {
45 for (j = 0; j < len; j++)
46 if ((char)data[i + j] != str[j])
56 nvbios_extend(struct nvkm_bios *bios, u32 length)
58 if (bios->size < length) {
59 u8 *prev = bios->data;
60 if (!(bios->data = kmalloc(length, GFP_KERNEL))) {
64 memcpy(bios->data, prev, bios->size);
73 nvkm_bios_rd08(struct nvkm_object *object, u64 addr)
75 struct nvkm_bios *bios = (void *)object;
76 return bios->data[addr];
80 nvkm_bios_rd16(struct nvkm_object *object, u64 addr)
82 struct nvkm_bios *bios = (void *)object;
83 return get_unaligned_le16(&bios->data[addr]);
87 nvkm_bios_rd32(struct nvkm_object *object, u64 addr)
89 struct nvkm_bios *bios = (void *)object;
90 return get_unaligned_le32(&bios->data[addr]);
94 nvkm_bios_wr08(struct nvkm_object *object, u64 addr, u8 data)
96 struct nvkm_bios *bios = (void *)object;
97 bios->data[addr] = data;
101 nvkm_bios_wr16(struct nvkm_object *object, u64 addr, u16 data)
103 struct nvkm_bios *bios = (void *)object;
104 put_unaligned_le16(data, &bios->data[addr]);
108 nvkm_bios_wr32(struct nvkm_object *object, u64 addr, u32 data)
110 struct nvkm_bios *bios = (void *)object;
111 put_unaligned_le32(data, &bios->data[addr]);
115 nvkm_bios_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
116 struct nvkm_oclass *oclass, void *data, u32 size,
117 struct nvkm_object **pobject)
119 struct nvkm_bios *bios;
120 struct bit_entry bit_i;
123 ret = nvkm_subdev_create(parent, engine, oclass, 0,
124 "VBIOS", "bios", &bios);
125 *pobject = nv_object(bios);
129 ret = nvbios_shadow(bios);
133 /* detect type of vbios we're dealing with */
134 bios->bmp_offset = nvbios_findstr(bios->data, bios->size,
135 "\xff\x7f""NV\0", 5);
136 if (bios->bmp_offset) {
137 nv_info(bios, "BMP version %x.%x\n",
138 bmp_version(bios) >> 8,
139 bmp_version(bios) & 0xff);
142 bios->bit_offset = nvbios_findstr(bios->data, bios->size,
144 if (bios->bit_offset)
145 nv_info(bios, "BIT signature found\n");
147 /* determine the vbios version number */
148 if (!bit_entry(bios, 'i', &bit_i) && bit_i.length >= 4) {
149 bios->version.major = nv_ro08(bios, bit_i.offset + 3);
150 bios->version.chip = nv_ro08(bios, bit_i.offset + 2);
151 bios->version.minor = nv_ro08(bios, bit_i.offset + 1);
152 bios->version.micro = nv_ro08(bios, bit_i.offset + 0);
153 bios->version.patch = nv_ro08(bios, bit_i.offset + 4);
155 if (bmp_version(bios)) {
156 bios->version.major = nv_ro08(bios, bios->bmp_offset + 13);
157 bios->version.chip = nv_ro08(bios, bios->bmp_offset + 12);
158 bios->version.minor = nv_ro08(bios, bios->bmp_offset + 11);
159 bios->version.micro = nv_ro08(bios, bios->bmp_offset + 10);
162 nv_info(bios, "version %02x.%02x.%02x.%02x.%02x\n",
163 bios->version.major, bios->version.chip,
164 bios->version.minor, bios->version.micro, bios->version.patch);
170 nvkm_bios_dtor(struct nvkm_object *object)
172 struct nvkm_bios *bios = (void *)object;
174 nvkm_subdev_destroy(&bios->subdev);
178 nvkm_bios_init(struct nvkm_object *object)
180 struct nvkm_bios *bios = (void *)object;
181 return nvkm_subdev_init(&bios->subdev);
185 nvkm_bios_fini(struct nvkm_object *object, bool suspend)
187 struct nvkm_bios *bios = (void *)object;
188 return nvkm_subdev_fini(&bios->subdev, suspend);
193 .handle = NV_SUBDEV(VBIOS, 0x00),
194 .ofuncs = &(struct nvkm_ofuncs) {
195 .ctor = nvkm_bios_ctor,
196 .dtor = nvkm_bios_dtor,
197 .init = nvkm_bios_init,
198 .fini = nvkm_bios_fini,
199 .rd08 = nvkm_bios_rd08,
200 .rd16 = nvkm_bios_rd16,
201 .rd32 = nvkm_bios_rd32,
202 .wr08 = nvkm_bios_wr08,
203 .wr16 = nvkm_bios_wr16,
204 .wr32 = nvkm_bios_wr32,