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drm/nouveau: make bios code easier to use externally

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2010-09-13 15:18:40 +10:00
parent 855a95e4fc
commit 4709bff02a
2 changed files with 50 additions and 23 deletions
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54
drivers/gpu/drm/nouveau/nouveau_bios.c
View File

@ -43,9 +43,6 @@
#define BIOSLOG(sip, fmt, arg...) NV_DEBUG(sip->dev, fmt, ##arg)
#define LOG_OLD_VALUE(x)
#define ROM16(x) le16_to_cpu(*(uint16_t *)&(x))
#define ROM32(x) le32_to_cpu(*(uint32_t *)&(x))
struct init_exec {
bool execute;
bool repeat;
@ -272,12 +269,6 @@ struct init_tbl_entry {
int (*handler)(struct nvbios *, uint16_t, struct init_exec *);
};
struct bit_entry {
uint8_t id[2];
uint16_t length;
uint16_t offset;
};
static int parse_init_table(struct nvbios *, unsigned int, struct init_exec *);
#define MACRO_INDEX_SIZE 2
@ -5365,7 +5356,7 @@ parse_bit_M_tbl_entry(struct drm_device *dev, struct nvbios *bios,
if (bitentry->length < 0x5)
return 0;
if (bitentry->id[1] < 2) {
if (bitentry->version < 2) {
bios->ram_restrict_group_count = bios->data[bitentry->offset + 2];
bios->ram_restrict_tbl_ptr = ROM16(bios->data[bitentry->offset + 3]);
} else {
@ -5475,27 +5466,40 @@ struct bit_table {
#define BIT_TABLE(id, funcid) ((struct bit_table){ id, parse_bit_##funcid##_tbl_entry })
int
bit_table(struct drm_device *dev, u8 id, struct bit_entry *bit)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nvbios *bios = &dev_priv->vbios;
u8 entries, *entry;
entries = bios->data[bios->offset + 10];
entry = &bios->data[bios->offset + 12];
while (entries--) {
if (entry[0] == id) {
bit->id = entry[0];
bit->version = entry[1];
bit->length = ROM16(entry[2]);
bit->offset = ROM16(entry[4]);
bit->data = ROMPTR(bios, entry[4]);
return 0;
}
entry += bios->data[bios->offset + 9];
}
return -ENOENT;
}
static int
parse_bit_table(struct nvbios *bios, const uint16_t bitoffset,
struct bit_table *table)
{
struct drm_device *dev = bios->dev;
uint8_t maxentries = bios->data[bitoffset + 4];
int i, offset;
struct bit_entry bitentry;
for (i = 0, offset = bitoffset + 6; i < maxentries; i++, offset += 6) {
bitentry.id[0] = bios->data[offset];
if (bitentry.id[0] != table->id)
continue;
bitentry.id[1] = bios->data[offset + 1];
bitentry.length = ROM16(bios->data[offset + 2]);
bitentry.offset = ROM16(bios->data[offset + 4]);
if (bit_table(dev, table->id, &bitentry) == 0)
return table->parse_fn(dev, bios, &bitentry);
}
NV_INFO(dev, "BIT table '%c' not found\n", table->id);
return -ENOSYS;
@ -6752,6 +6756,8 @@ static int nouveau_parse_vbios_struct(struct drm_device *dev)
bit_signature, sizeof(bit_signature));
if (offset) {
NV_TRACE(dev, "BIT BIOS found\n");
bios->type = NVBIOS_BIT;
bios->offset = offset;
return parse_bit_structure(bios, offset + 6);
}
@ -6759,6 +6765,8 @@ static int nouveau_parse_vbios_struct(struct drm_device *dev)
bmp_signature, sizeof(bmp_signature));
if (offset) {
NV_TRACE(dev, "BMP BIOS found\n");
bios->type = NVBIOS_BMP;
bios->offset = offset;
return parse_bmp_structure(dev, bios, offset);
}

19
drivers/gpu/drm/nouveau/nouveau_bios.h
View File

@ -34,6 +34,20 @@
#define DCB_LOC_ON_CHIP 0
#define ROM16(x) le16_to_cpu(*(uint16_t *)&(x))
#define ROM32(x) le32_to_cpu(*(uint32_t *)&(x))
#define ROMPTR(bios, x) (ROM16(x) ? &(bios)->data[ROM16(x)] : NULL)
struct bit_entry {
uint8_t id;
uint8_t version;
uint16_t length;
uint16_t offset;
uint8_t *data;
};
int bit_table(struct drm_device *, u8 id, struct bit_entry *);
struct dcb_i2c_entry {
uint32_t entry;
uint8_t port_type;
@ -224,6 +238,11 @@ struct pll_lims {
struct nvbios {
struct drm_device *dev;
enum {
NVBIOS_BMP,
NVBIOS_BIT
} type;
uint16_t offset;
uint8_t chip_version;