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added more I2C stuff (in progress)

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git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14241 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Rudolf Cornelissen
2005-09-25 17:48:04 +00:00
parent 3df611d78d
commit d1d567ab21
1 changed files with 42 additions and 9 deletions
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src/add-ons/accelerants/nvidia/engine/nv_i2c.c
+42 -9
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@@ -280,9 +280,6 @@ static char FlagIICError (char ErrNo)
static void OutSCL(uint8 BusNR, bool Bit)
{
uint8 data;
/* enable access to primary head */
set_crtc_owner(0);
if (BusNR)
{
@@ -294,7 +291,7 @@ static void OutSCL(uint8 BusNR, bool Bit)
}
else
{
data = CRTCR(WR_I2CBUS_0) & 0xf0;
data = (CRTCR(WR_I2CBUS_0) & 0xf0) | 0x01;
if (Bit)
CRTCW(WR_I2CBUS_0, (data | 0x20));
else
@@ -304,19 +301,52 @@ static void OutSCL(uint8 BusNR, bool Bit)
static void OutSDA(uint8 BusNR, bool Bit)
{
//fixme..
uint8 data;
if (BusNR)
{
data = (CRTCR(WR_I2CBUS_1) & 0xf0) | 0x01;
if (Bit)
CRTCW(WR_I2CBUS_1, (data | 0x10));
else
CRTCW(WR_I2CBUS_1, (data & ~0x10));
}
else
{
data = (CRTCR(WR_I2CBUS_0) & 0xf0) | 0x01;
if (Bit)
CRTCW(WR_I2CBUS_0, (data | 0x10));
else
CRTCW(WR_I2CBUS_0, (data & ~0x10));
}
}
static bool InSCL(uint8 BusNR)
{
//fixme..
return 0;
if (BusNR)
{
if ((CRTCR(RD_I2CBUS_1) & 0x04)) return true;
}
else
{
if ((CRTCR(RD_I2CBUS_0) & 0x04)) return true;
}
return false;
}
static bool InSDA(uint8 BusNR)
{
//fixme..
return 0;
if (BusNR)
{
if ((CRTCR(RD_I2CBUS_1) & 0x08)) return true;
}
else
{
if ((CRTCR(RD_I2CBUS_0) & 0x08)) return true;
}
return false;
}
static void TXBit (uint8 BusNR, bool Bit)
@@ -367,6 +397,9 @@ static uint8 i2c_readbyte(uint8 BusNR, bool Ack)
{
uint8 cnt, bit, byte = 0;
/* enable access to primary head */
set_crtc_owner(0);
/* read data */
for (cnt = 8; cnt > 0; cnt--)
{