From e296927bcc910ffa9e171c0108a4bf74c0836553 Mon Sep 17 00:00:00 2001 From: "Antonino A. Daplas" Date: Tue, 8 May 2007 00:38:24 -0700 Subject: [PATCH] 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/nvidia/nv_i2c.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/drivers/video/nvidia/nv_i2c.c b/drivers/video/nvidia/nv_i2c.c index 4fc7118397..afe4567e1f 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; -- 2.39.5