From 4709bff02adcb0d05d2d1a397e60581baa562de9 Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Mon, 13 Sep 2010 15:18:40 +1000 Subject: [PATCH] drm/nouveau: make bios code easier to use externally Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_bios.c | 54 +++++++++++++++++++--------------- drivers/gpu/drm/nouveau/nouveau_bios.h | 19 ++++++++++++ 2 files changed, 50 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c index 2319390..ef44070 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bios.c +++ b/drivers/gpu/drm/nouveau/nouveau_bios.c @@ -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); } diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.h b/drivers/gpu/drm/nouveau/nouveau_bios.h index 02c5dd0..50a648e 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bios.h +++ b/drivers/gpu/drm/nouveau/nouveau_bios.h @@ -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; -- 2.7.4