summaryrefslogtreecommitdiff
path: root/drivers/video/nvidia
diff options
context:
space:
mode:
authorAntonino A. Daplas <adaplas@gmail.com>2007-05-08 00:38:24 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:15:28 -0700
commite296927bcc910ffa9e171c0108a4bf74c0836553 (patch)
treec04286baf04ab728249c96c868d0b1779da3c5fa /drivers/video/nvidia
parentb9b2696de920e7366e2ce0cdc3b3b7fc11e44e99 (diff)
nvidiafb: access CRT registers safely
Use Read/WriteCrtc() to access CRTC registers in nv_i2c.c. These are safer because it uses the correct CRTC base (0x3bx or 0x3dx). Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/nvidia')
-rw-r--r--drivers/video/nvidia/nv_i2c.c18
1 files changed, 6 insertions, 12 deletions
diff --git a/drivers/video/nvidia/nv_i2c.c b/drivers/video/nvidia/nv_i2c.c
index 4fc7118397fe..afe4567e1ff4 100644
--- a/drivers/video/nvidia/nv_i2c.c
+++ b/drivers/video/nvidia/nv_i2c.c
@@ -30,16 +30,14 @@ static void nvidia_gpio_setscl(void *data, int state)
struct nvidia_par *par = chan->par;
u32 val;
- VGA_WR08(par->PCIO, 0x3d4, chan->ddc_base + 1);
- val = VGA_RD08(par->PCIO, 0x3d5) & 0xf0;
+ val = NVReadCrtc(par, chan->ddc_base + 1) & 0xf0;
if (state)
val |= 0x20;
else
val &= ~0x20;
- VGA_WR08(par->PCIO, 0x3d4, chan->ddc_base + 1);
- VGA_WR08(par->PCIO, 0x3d5, val | 0x1);
+ NVWriteCrtc(par, chan->ddc_base + 1, val | 0x01);
}
static void nvidia_gpio_setsda(void *data, int state)
@@ -48,16 +46,14 @@ static void nvidia_gpio_setsda(void *data, int state)
struct nvidia_par *par = chan->par;
u32 val;
- VGA_WR08(par->PCIO, 0x3d4, chan->ddc_base + 1);
- val = VGA_RD08(par->PCIO, 0x3d5) & 0xf0;
+ val = NVReadCrtc(par, chan->ddc_base + 1) & 0xf0;
if (state)
val |= 0x10;
else
val &= ~0x10;
- VGA_WR08(par->PCIO, 0x3d4, chan->ddc_base + 1);
- VGA_WR08(par->PCIO, 0x3d5, val | 0x1);
+ NVWriteCrtc(par, chan->ddc_base + 1, val | 0x01);
}
static int nvidia_gpio_getscl(void *data)
@@ -66,8 +62,7 @@ static int nvidia_gpio_getscl(void *data)
struct nvidia_par *par = chan->par;
u32 val = 0;
- VGA_WR08(par->PCIO, 0x3d4, chan->ddc_base);
- if (VGA_RD08(par->PCIO, 0x3d5) & 0x04)
+ if (NVReadCrtc(par, chan->ddc_base) & 0x04)
val = 1;
return val;
@@ -79,8 +74,7 @@ static int nvidia_gpio_getsda(void *data)
struct nvidia_par *par = chan->par;
u32 val = 0;
- VGA_WR08(par->PCIO, 0x3d4, chan->ddc_base);
- if (VGA_RD08(par->PCIO, 0x3d5) & 0x08)
+ if (NVReadCrtc(par, chan->ddc_base) & 0x08)
val = 1;
return val;