d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add support for the Keywest I2C controller in Apple uninorth northbridges.

Browse Source 
Although the Keywest registers have only 1 byte of content, they are
secretly 4-byte registers, which became apparent from them moving on the
big-endian Uninorth version of the controller.
This commit is contained in:
Nathan Whitehorn 2010-06-18 14:28:57 +00:00
parent 9f220e4d78
commit c8812077bf
1 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/powerpc/powermac/kiic.c
View File

@ -57,6 +57,7 @@
#define ADDR 5
#define SUBADDR 6
#define DATA 7
#define REV 8
/* MODE */
#define I2C_SPEED 0x03 /* Speed mask */
@ -146,6 +147,7 @@ static driver_t kiic_driver = {
static devclass_t kiic_devclass;
DRIVER_MODULE(kiic, macio, kiic_driver, kiic_devclass, 0, 0);
DRIVER_MODULE(kiic, unin, kiic_driver, kiic_devclass, 0, 0);
static int
kiic_probe(device_t self)
@ -235,6 +237,9 @@ kiic_attach(device_t self)
kiic_writereg(sc, IER, I2C_INT_DATA | I2C_INT_ADDR | I2C_INT_STOP);
if (bootverbose)
device_printf(self, "Revision: %02X\n", kiic_readreg(sc, REV));
/* Add the IIC bus layer */
sc->sc_iicbus = device_add_child(self, "iicbus", -1);
@ -244,14 +249,14 @@ kiic_attach(device_t self)
static void
kiic_writereg(struct kiic_softc *sc, u_int reg, u_int val)
{
bus_write_1(sc->sc_reg, sc->sc_regstep * reg, val);
bus_write_4(sc->sc_reg, sc->sc_regstep * reg, val);
DELAY(10); /* register access delay */
}
static u_int
kiic_readreg(struct kiic_softc *sc, u_int reg)
{
return bus_read_1(sc->sc_reg, sc->sc_regstep * reg);
return bus_read_4(sc->sc_reg, sc->sc_regstep * reg) & 0xff;
}
static void