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/*
* 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 <core/object.h>
#include <core/device.h>
#include <core/subdev.h>
#include <core/option.h>
#include <subdev/bios.h>
#include <subdev/bios/bmp.h>
#include <subdev/bios/bit.h>
#include "priv.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 nouveau_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
nouveau_bios_rd08(struct nouveau_object *object, u64 addr)
{
struct nouveau_bios *bios = (void *)object;
return bios->data[addr];
}
static u16
nouveau_bios_rd16(struct nouveau_object *object, u64 addr)
{
struct nouveau_bios *bios = (void *)object;
return get_unaligned_le16(&bios->data[addr]);
}
static u32
nouveau_bios_rd32(struct nouveau_object *object, u64 addr)
{
struct nouveau_bios *bios = (void *)object;
return get_unaligned_le32(&bios->data[addr]);
}
static void
nouveau_bios_wr08(struct nouveau_object *object, u64 addr, u8 data)
{
struct nouveau_bios *bios = (void *)object;
bios->data[addr] = data;
}
static void
nouveau_bios_wr16(struct nouveau_object *object, u64 addr, u16 data)
{
struct nouveau_bios *bios = (void *)object;
put_unaligned_le16(data, &bios->data[addr]);
}
static void
nouveau_bios_wr32(struct nouveau_object *object, u64 addr, u32 data)
{
struct nouveau_bios *bios = (void *)object;
put_unaligned_le32(data, &bios->data[addr]);
}
static int
nouveau_bios_ctor(struct nouveau_object *parent,
struct nouveau_object *engine,
struct nouveau_oclass *oclass, void *data, u32 size,
struct nouveau_object **pobject)
{
struct nouveau_bios *bios;
struct bit_entry bit_i;
int ret;
ret = nouveau_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
nouveau_bios_dtor(struct nouveau_object *object)
{
struct nouveau_bios *bios = (void *)object;
kfree(bios->data);
nouveau_subdev_destroy(&bios->base);
}
static int
nouveau_bios_init(struct nouveau_object *object)
{
struct nouveau_bios *bios = (void *)object;
return nouveau_subdev_init(&bios->base);
}
static int
nouveau_bios_fini(struct nouveau_object *object, bool suspend)
{
struct nouveau_bios *bios = (void *)object;
return nouveau_subdev_fini(&bios->base, suspend);
}
struct nouveau_oclass
nouveau_bios_oclass = {
.handle = NV_SUBDEV(VBIOS, 0x00),
.ofuncs = &(struct nouveau_ofuncs) {
.ctor = nouveau_bios_ctor,
.dtor = nouveau_bios_dtor,
.init = nouveau_bios_init,
.fini = nouveau_bios_fini,
.rd08 = nouveau_bios_rd08,
.rd16 = nouveau_bios_rd16,
.rd32 = nouveau_bios_rd32,
.wr08 = nouveau_bios_wr08,
.wr16 = nouveau_bios_wr16,
.wr32 = nouveau_bios_wr32,
},
};
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