/**
* ti_gpio_attach - attach function for the driver
* @dev: gpio device handle
*
* Allocates and sets up the driver context for all GPIO banks. This function
* expects the memory ranges and IRQs to already be allocated to the driver.
*
* LOCKING:
* None
*
* RETURNS:
* Always returns 0
*/
static int
ti_gpio_attach(device_t dev)
{
struct ti_gpio_softc *sc;
#ifndef INTRNG
unsigned int i;
#endif
int err;
sc = device_get_softc(dev);
sc->sc_dev = dev;
TI_GPIO_LOCK_INIT(sc);
ti_gpio_pin_max(dev, &sc->sc_maxpin);
sc->sc_maxpin++;
sc->sc_mem_rid = 0;
sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&sc->sc_mem_rid, RF_ACTIVE);
if (!sc->sc_mem_res) {
device_printf(dev, "Error: could not allocate mem resources\n");
ti_gpio_detach(dev);
return (ENXIO);
}
sc->sc_irq_rid = 0;
sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
&sc->sc_irq_rid, RF_ACTIVE);
if (!sc->sc_irq_res) {
device_printf(dev, "Error: could not allocate irq resources\n");
ti_gpio_detach(dev);
return (ENXIO);
}
/*
* Register our interrupt filter for each of the IRQ resources.
*/
if (bus_setup_intr(dev, sc->sc_irq_res,
INTR_TYPE_MISC | INTR_MPSAFE, ti_gpio_intr, NULL, sc,
&sc->sc_irq_hdl) != 0) {
device_printf(dev,
"WARNING: unable to register interrupt filter\n");
ti_gpio_detach(dev);
return (ENXIO);
}
#ifdef INTRNG
if (ti_gpio_pic_attach(sc) != 0) {
device_printf(dev, "WARNING: unable to attach PIC\n");
ti_gpio_detach(dev);
return (ENXIO);
}
#else
/*
* Initialize the interrupt settings. The default is active-low
* interrupts.
*/
sc->sc_irq_trigger = malloc(
sizeof(*sc->sc_irq_trigger) * sc->sc_maxpin,
M_DEVBUF, M_WAITOK | M_ZERO);
sc->sc_irq_polarity = malloc(
sizeof(*sc->sc_irq_polarity) * sc->sc_maxpin,
M_DEVBUF, M_WAITOK | M_ZERO);
for (i = 0; i < sc->sc_maxpin; i++) {
sc->sc_irq_trigger[i] = INTR_TRIGGER_LEVEL;
sc->sc_irq_polarity[i] = INTR_POLARITY_LOW;
}
sc->sc_events = malloc(sizeof(struct intr_event *) * sc->sc_maxpin,
M_DEVBUF, M_WAITOK | M_ZERO);
sc->sc_mask_args = malloc(sizeof(struct ti_gpio_mask_arg) * sc->sc_maxpin,
M_DEVBUF, M_WAITOK | M_ZERO);
#endif
/* We need to go through each block and ensure the clocks are running and
* the module is enabled. It might be better to do this only when the
* pins are configured which would result in less power used if the GPIO
* pins weren't used ...
*/
if (sc->sc_mem_res != NULL) {
/* Initialize the GPIO module. */
err = ti_gpio_bank_init(dev);
if (err != 0) {
ti_gpio_detach(dev);
return (err);
}
}
sc->sc_busdev = gpiobus_attach_bus(dev);
if (sc->sc_busdev == NULL) {
ti_gpio_detach(dev);
return (ENXIO);
}
return (0);
}
/**
* ti_gpio_attach - attach function for the driver
* @dev: gpio device handle
*
* Allocates and sets up the driver context for all GPIO banks. This function
* expects the memory ranges and IRQs to already be allocated to the driver.
*
* LOCKING:
* None
*
* RETURNS:
* Always returns 0
*/
static int
ti_gpio_attach(device_t dev)
{
struct ti_gpio_softc *sc;
int err;
sc = device_get_softc(dev);
sc->sc_dev = dev;
TI_GPIO_LOCK_INIT(sc);
ti_gpio_pin_max(dev, &sc->sc_maxpin);
sc->sc_maxpin++;
sc->sc_mem_rid = 0;
sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&sc->sc_mem_rid, RF_ACTIVE);
if (!sc->sc_mem_res) {
device_printf(dev, "Error: could not allocate mem resources\n");
ti_gpio_detach(dev);
return (ENXIO);
}
sc->sc_irq_rid = 0;
sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
&sc->sc_irq_rid, RF_ACTIVE);
if (!sc->sc_irq_res) {
device_printf(dev, "Error: could not allocate irq resources\n");
ti_gpio_detach(dev);
return (ENXIO);
}
/*
* Register our interrupt filter for each of the IRQ resources.
*/
if (bus_setup_intr(dev, sc->sc_irq_res,
INTR_TYPE_MISC | INTR_MPSAFE, ti_gpio_intr, NULL, sc,
&sc->sc_irq_hdl) != 0) {
device_printf(dev,
"WARNING: unable to register interrupt filter\n");
ti_gpio_detach(dev);
return (ENXIO);
}
if (ti_gpio_pic_attach(sc) != 0) {
device_printf(dev, "WARNING: unable to attach PIC\n");
ti_gpio_detach(dev);
return (ENXIO);
}
/* We need to go through each block and ensure the clocks are running and
* the module is enabled. It might be better to do this only when the
* pins are configured which would result in less power used if the GPIO
* pins weren't used ...
*/
if (sc->sc_mem_res != NULL) {
/* Initialize the GPIO module. */
err = ti_gpio_bank_init(dev);
if (err != 0) {
ti_gpio_detach(dev);
return (err);
}
}
sc->sc_busdev = gpiobus_attach_bus(dev);
if (sc->sc_busdev == NULL) {
ti_gpio_detach(dev);
return (ENXIO);
}
return (0);
}
