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sisfb: move XGI POST RAM type detection into a subroutine 

Move XGI POST RAM type detection into a separate subroutine to make
further code changes easier. No changes in functionality

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Aaro Koskinen 2011-02-13 22:11:24 +00:00 committed by Paul Mundt
parent 83ea0f164c
commit 74de5f4e52
1 changed files with 35 additions and 22 deletions
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57
drivers/video/sis/sis_main.c
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@ -4936,6 +4936,40 @@ sisfb_post_xgi_setclocks(struct sis_video_info *ivideo, u8 regb)
sisfb_post_xgi_delay(ivideo, 0x43); sisfb_post_xgi_delay(ivideo, 0x43);
} }
static u8 __devinit
sisfb_post_xgi_ramtype(struct sis_video_info *ivideo)
{
unsigned char *bios = ivideo->bios_abase;
u8 ramtype;
u8 reg;
u8 v1;
ramtype = 0x00; v1 = 0x10;
if (ivideo->haveXGIROM) {
ramtype = bios[0x62];
v1 = bios[0x1d2];
}
if (!(ramtype & 0x80)) {
if (ivideo->chip == XGI_20) {
SiS_SetReg(SISCR, 0x97, v1);
reg = SiS_GetReg(SISCR, 0x97);
if (reg & 0x10) {
ramtype = (reg & 0x01) << 1;
}
} else {
reg = SiS_GetReg(SISSR, 0x39);
ramtype = reg & 0x02;
if (!(ramtype)) {
reg = SiS_GetReg(SISSR, 0x3a);
ramtype = (reg >> 1) & 0x01;
}
}
}
ramtype &= 0x07;
return ramtype;
}
static int __devinit static int __devinit
sisfb_post_xgi(struct pci_dev *pdev) sisfb_post_xgi(struct pci_dev *pdev)
{ {
@ -5380,28 +5414,7 @@ sisfb_post_xgi(struct pci_dev *pdev)
SiS_SetReg(SISSR, 0x1c, 0x00); SiS_SetReg(SISSR, 0x1c, 0x00);
} }
ramtype = 0x00; v1 = 0x10; ramtype = sisfb_post_xgi_ramtype(ivideo);
if(ivideo->haveXGIROM) {
ramtype = bios[0x62];
v1 = bios[0x1d2];
}
if(!(ramtype & 0x80)) {
if(ivideo->chip == XGI_20) {
SiS_SetReg(SISCR, 0x97, v1);
reg = SiS_GetReg(SISCR, 0x97);
if(reg & 0x10) {
ramtype = (reg & 0x01) << 1;
}
} else {
reg = SiS_GetReg(SISSR, 0x39);
ramtype = reg & 0x02;
if(!(ramtype)) {
reg = SiS_GetReg(SISSR, 0x3a);
ramtype = (reg >> 1) & 0x01;
}
}
}
ramtype &= 0x07;
regb = 0; /* ! */ regb = 0; /* ! */