提交 f7829158 编写于 作者: A Antonino A. Daplas 提交者: Linus Torvalds

savagefb: rework i2c bit access

Use already defined VGAwCR/VGArCR functions to access the i2c bus.
Signed-off-by: NAntonino Daplas <adaplas@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 7dfe50b3
......@@ -41,10 +41,6 @@
#define SAVAGE4_I2C_SCL_IN 0x00000008
#define SAVAGE4_I2C_SDA_IN 0x00000010
#define SET_CR_IX(base, val) writeb((val), base + 0x8000 + VGA_CR_IX)
#define SET_CR_DATA(base, val) writeb((val), base + 0x8000 + VGA_CR_DATA)
#define GET_CR_DATA(base) readb(base + 0x8000 + VGA_CR_DATA)
static void savage4_gpio_setscl(void *data, int val)
{
struct savagefb_i2c_chan *chan = data;
......@@ -92,15 +88,15 @@ static void prosavage_gpio_setscl(void* data, int val)
struct savagefb_i2c_chan *chan = data;
u32 r;
SET_CR_IX(chan->ioaddr, chan->reg);
r = GET_CR_DATA(chan->ioaddr);
r = VGArCR(chan->reg, chan->par);
r |= PROSAVAGE_I2C_ENAB;
if (val) {
r |= PROSAVAGE_I2C_SCL_OUT;
} else {
r &= ~PROSAVAGE_I2C_SCL_OUT;
}
SET_CR_DATA(chan->ioaddr, r);
VGAwCR(chan->reg, r, chan->par);
}
static void prosavage_gpio_setsda(void* data, int val)
......@@ -108,31 +104,29 @@ static void prosavage_gpio_setsda(void* data, int val)
struct savagefb_i2c_chan *chan = data;
unsigned int r;
SET_CR_IX(chan->ioaddr, chan->reg);
r = GET_CR_DATA(chan->ioaddr);
r = VGArCR(chan->reg, chan->par);
r |= PROSAVAGE_I2C_ENAB;
if (val) {
r |= PROSAVAGE_I2C_SDA_OUT;
} else {
r &= ~PROSAVAGE_I2C_SDA_OUT;
}
SET_CR_DATA(chan->ioaddr, r);
VGAwCR(chan->reg, r, chan->par);
}
static int prosavage_gpio_getscl(void* data)
{
struct savagefb_i2c_chan *chan = data;
SET_CR_IX(chan->ioaddr, chan->reg);
return (0 != (GET_CR_DATA(chan->ioaddr) & PROSAVAGE_I2C_SCL_IN));
return (VGArCR(chan->reg, chan->par) & PROSAVAGE_I2C_SCL_IN) ? 1 : 0;
}
static int prosavage_gpio_getsda(void* data)
{
struct savagefb_i2c_chan *chan = data;
SET_CR_IX(chan->ioaddr, chan->reg);
return (0 != (GET_CR_DATA(chan->ioaddr) & PROSAVAGE_I2C_SDA_IN));
return (VGArCR(chan->reg, chan->par) & PROSAVAGE_I2C_SDA_IN) ? 1 : 0;
}
static int savage_setup_i2c_bus(struct savagefb_i2c_chan *chan,
......
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