static void
iicbus_probe_nomatch(device_t bus, device_t child)
{
struct iicbus_ivar *devi = IICBUS_IVAR(child);
device_printf(bus, "<unknown card> at addr %#x\n", devi->addr);
}
static struct resource_list *
iicbus_get_resource_list(device_t bus __unused, device_t child)
{
struct iicbus_ivar *devi;
devi = IICBUS_IVAR(child);
return (&devi->rl);
}
static int
iicbus_child_location_str(device_t bus, device_t child, char *buf,
size_t buflen)
{
struct iicbus_ivar *devi = IICBUS_IVAR(child);
snprintf(buf, buflen, "addr=%#x", devi->addr);
return (0);
}
static void
iicbus_hinted_child(device_t bus, const char *dname, int dunit)
{
device_t child;
struct iicbus_ivar *devi;
child = BUS_ADD_CHILD(bus, 0, dname, dunit);
devi = IICBUS_IVAR(child);
resource_int_value(dname, dunit, "addr", &devi->addr);
}
static int
iicbus_print_child(device_t dev, device_t child)
{
struct iicbus_ivar *devi = IICBUS_IVAR(child);
int retval = 0;
retval += bus_print_child_header(dev, child);
if (devi->addr != 0)
retval += printf(" at addr %#x", devi->addr);
retval += bus_print_child_footer(dev, child);
return (retval);
}
static int
iicbus_print_child(device_t dev, device_t child)
{
struct iicbus_ivar *devi = IICBUS_IVAR(child);
int retval = 0;
retval += bus_print_child_header(dev, child);
if (devi->addr != 0)
retval += printf(" at addr %#x", devi->addr);
resource_list_print_type(&devi->rl, "irq", SYS_RES_IRQ, "%jd");
retval += bus_print_child_footer(dev, child);
return (retval);
}
static int
iicbus_read_ivar(device_t bus, device_t child, int which, uintptr_t *result)
{
struct iicbus_ivar *devi = IICBUS_IVAR(child);
switch (which) {
default:
return (EINVAL);
case IICBUS_IVAR_ADDR:
*result = devi->addr;
break;
}
return (0);
}
static void
iicbus_hinted_child(device_t bus, const char *dname, int dunit)
{
device_t child;
int irq;
struct iicbus_ivar *devi;
child = BUS_ADD_CHILD(bus, 0, dname, dunit);
devi = IICBUS_IVAR(child);
resource_int_value(dname, dunit, "addr", &devi->addr);
if (resource_int_value(dname, dunit, "irq", &irq) == 0) {
if (bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1) != 0)
device_printf(bus,
"warning: bus_set_resource() failed\n");
}
}
static int
iicbus_write_ivar(device_t bus, device_t child, int which, uintptr_t value)
{
struct iicbus_ivar *devi = IICBUS_IVAR(child);
switch (which) {
default:
return (EINVAL);
case IICBUS_IVAR_ADDR:
if (devi->addr != 0)
return (EINVAL);
devi->addr = value;
case IICBUS_IVAR_NOSTOP:
devi->nostop = value;
break;
}
return (0);
}
static int
mv_twsi_attach(device_t dev)
{
struct mv_twsi_softc *sc;
phandle_t child, iicbusnode;
device_t childdev;
struct iicbus_ivar *devi;
char dname[32]; /* 32 is taken from struct u_device */
uint32_t paddr;
int len, error;
sc = device_get_softc(dev);
sc->dev = dev;
bzero(baud_rate, sizeof(baud_rate));
mtx_init(&sc->mutex, device_get_nameunit(dev), MV_TWSI_NAME, MTX_DEF);
/* Allocate IO resources */
if (bus_alloc_resources(dev, res_spec, sc->res)) {
device_printf(dev, "could not allocate resources\n");
mv_twsi_detach(dev);
return (ENXIO);
}
mv_twsi_cal_baud_rate(TWSI_BAUD_RATE_SLOW, &baud_rate[IIC_SLOW]);
mv_twsi_cal_baud_rate(TWSI_BAUD_RATE_FAST, &baud_rate[IIC_FAST]);
if (bootverbose)
device_printf(dev, "calculated baud rates are:\n"
" %" PRIu32 " kHz (M=%d, N=%d) for slow,\n"
" %" PRIu32 " kHz (M=%d, N=%d) for fast.\n",
baud_rate[IIC_SLOW].raw / 1000,
baud_rate[IIC_SLOW].m,
baud_rate[IIC_SLOW].n,
baud_rate[IIC_FAST].raw / 1000,
baud_rate[IIC_FAST].m,
baud_rate[IIC_FAST].n);
sc->iicbus = device_add_child(dev, IICBUS_DEVNAME, -1);
if (sc->iicbus == NULL) {
device_printf(dev, "could not add iicbus child\n");
mv_twsi_detach(dev);
return (ENXIO);
}
/* Attach iicbus. */
bus_generic_attach(dev);
iicbusnode = 0;
/* Find iicbus as the child devices in the device tree. */
for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
child = OF_peer(child)) {
len = OF_getproplen(child, "model");
if (len <= 0 || len > sizeof(dname) - 1)
continue;
error = OF_getprop(child, "model", &dname, len);
dname[len + 1] = '\0';
if (error == -1)
continue;
len = strlen(dname);
if (len == strlen(IICBUS_DEVNAME) &&
strncasecmp(dname, IICBUS_DEVNAME, len) == 0) {
iicbusnode = child;
break;
}
}
if (iicbusnode == 0)
goto attach_end;
/* Attach child devices onto iicbus. */
for (child = OF_child(iicbusnode); child != 0; child = OF_peer(child)) {
/* Get slave address. */
error = OF_getprop(child, "i2c-address", &paddr, sizeof(paddr));
if (error == -1)
error = OF_getprop(child, "reg", &paddr, sizeof(paddr));
if (error == -1)
continue;
/* Get device driver name. */
len = OF_getproplen(child, "model");
if (len <= 0 || len > sizeof(dname) - 1)
continue;
OF_getprop(child, "model", &dname, len);
dname[len + 1] = '\0';
if (bootverbose)
device_printf(dev, "adding a device %s at %d.\n",
dname, fdt32_to_cpu(paddr));
childdev = BUS_ADD_CHILD(sc->iicbus, 0, dname, -1);
devi = IICBUS_IVAR(childdev);
devi->addr = fdt32_to_cpu(paddr);
}
attach_end:
bus_generic_attach(sc->iicbus);
return (0);
}
static int
mv_twsi_attach(device_t dev)
{
struct twsi_softc *sc;
phandle_t child, iicbusnode;
device_t childdev;
struct iicbus_ivar *devi;
char dname[32]; /* 32 is taken from struct u_device */
uint32_t paddr;
int len, error, ret;
sc = device_get_softc(dev);
mv_twsi_cal_baud_rate(TWSI_BAUD_RATE_SLOW, &sc->baud_rate[IIC_SLOW]);
mv_twsi_cal_baud_rate(TWSI_BAUD_RATE_FAST, &sc->baud_rate[IIC_FAST]);
if (bootverbose)
device_printf(dev, "calculated baud rates are:\n"
" %" PRIu32 " kHz (M=%d, N=%d) for slow,\n"
" %" PRIu32 " kHz (M=%d, N=%d) for fast.\n",
sc->baud_rate[IIC_SLOW].raw / 1000,
sc->baud_rate[IIC_SLOW].m,
sc->baud_rate[IIC_SLOW].n,
sc->baud_rate[IIC_FAST].raw / 1000,
sc->baud_rate[IIC_FAST].m,
sc->baud_rate[IIC_FAST].n);
ret = twsi_attach(dev);
if (ret != 0)
return (ret);
iicbusnode = 0;
/* Find iicbus as the child devices in the device tree. */
for (child = OF_child(ofw_bus_get_node(dev)); child != 0;
child = OF_peer(child)) {
len = OF_getproplen(child, "model");
if (len <= 0 || len > sizeof(dname))
continue;
error = OF_getprop(child, "model", &dname, len);
if (error == -1)
continue;
len = strlen(dname);
if (len == strlen(IICBUS_DEVNAME) &&
strncasecmp(dname, IICBUS_DEVNAME, len) == 0) {
iicbusnode = child;
break;
}
}
if (iicbusnode == 0)
goto attach_end;
/* Attach child devices onto iicbus. */
for (child = OF_child(iicbusnode); child != 0; child = OF_peer(child)) {
/* Get slave address. */
error = OF_getencprop(child, "i2c-address", &paddr, sizeof(paddr));
if (error == -1)
error = OF_getencprop(child, "reg", &paddr, sizeof(paddr));
if (error == -1)
continue;
/* Get device driver name. */
len = OF_getproplen(child, "model");
if (len <= 0 || len > sizeof(dname))
continue;
OF_getprop(child, "model", &dname, len);
if (bootverbose)
device_printf(dev, "adding a device %s at %d.\n",
dname, paddr);
childdev = BUS_ADD_CHILD(sc->iicbus, 0, dname, -1);
devi = IICBUS_IVAR(childdev);
devi->addr = paddr;
}
attach_end:
bus_generic_attach(sc->iicbus);
return (0);
}