diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/tdfxfb.c | 45 |
1 files changed, 22 insertions, 23 deletions
diff --git a/drivers/video/tdfxfb.c b/drivers/video/tdfxfb.c index c8b0be2d871..7044226c5d4 100644 --- a/drivers/video/tdfxfb.c +++ b/drivers/video/tdfxfb.c @@ -430,36 +430,35 @@ static void do_write_regs(struct fb_info *info, struct banshee_reg* reg) static unsigned long do_lfb_size(struct tdfx_par *par, unsigned short dev_id) { - u32 draminit0 = 0; - u32 draminit1 = 0; - u32 miscinit1 = 0; - u32 lfbsize = 0; - int sgram_p = 0; + u32 draminit0; + u32 draminit1; + u32 miscinit1; + + int num_chips; + int chip_size; /* in MB */ + u32 lfbsize; + int has_sgram; draminit0 = tdfx_inl(par, DRAMINIT0); draminit1 = tdfx_inl(par, DRAMINIT1); + + num_chips = (draminit0 & DRAMINIT0_SGRAM_NUM) ? 8 : 4; - if ((dev_id == PCI_DEVICE_ID_3DFX_BANSHEE) || - (dev_id == PCI_DEVICE_ID_3DFX_VOODOO3)) { - sgram_p = (draminit1 & DRAMINIT1_MEM_SDRAM) ? 0 : 1; - - lfbsize = sgram_p ? - (((draminit0 & DRAMINIT0_SGRAM_NUM) ? 2 : 1) * - ((draminit0 & DRAMINIT0_SGRAM_TYPE) ? 8 : 4) * 1024 * 1024) : - 16 * 1024 * 1024; + if (dev_id < PCI_DEVICE_ID_3DFX_VOODOO5) { + /* Banshee/Voodoo3 */ + has_sgram = draminit1 & DRAMINIT1_MEM_SDRAM; + chip_size = has_sgram ? ((draminit0 & DRAMINIT0_SGRAM_TYPE) ? 2 : 1) + : 2; } else { /* Voodoo4/5 */ - u32 chips, psize, banks; - - chips = ((draminit0 & (1 << 26)) == 0) ? 4 : 8; - psize = 1 << ((draminit0 & 0x38000000) >> 28); - banks = ((draminit0 & (1 << 30)) == 0) ? 2 : 4; - lfbsize = chips * psize * banks; - lfbsize <<= 20; - } - /* disable block writes for SDRAM (why?) */ + has_sgram = 0; + chip_size = 1 << ((draminit0 & DRAMINIT0_SGRAM_TYPE_MASK) >> DRAMINIT0_SGRAM_TYPE_SHIFT); + } + lfbsize = num_chips * chip_size * 1024 * 1024; + + /* disable block writes for SDRAM */ miscinit1 = tdfx_inl(par, MISCINIT1); - miscinit1 |= sgram_p ? 0 : MISCINIT1_2DBLOCK_DIS; + miscinit1 |= has_sgram ? 0 : MISCINIT1_2DBLOCK_DIS; miscinit1 |= MISCINIT1_CLUT_INV; banshee_make_room(par, 1); |