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Add glue code to build as module.

This commit is contained in:
mbalmer 2011-08-31 12:23:32 +00:00
parent d020095c80
commit 5d1f2a00ee
1 changed files with 43 additions and 8 deletions
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51
sys/dev/gpio/gpioow.c
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@ -1,4 +1,4 @@
/* $NetBSD: gpioow.c,v 1.12 2009/11/12 19:22:08 dyoung Exp $ */
/* $NetBSD: gpioow.c,v 1.13 2011/08/31 12:23:32 mbalmer Exp $ */
/* $OpenBSD: gpioow.c,v 1.1 2006/03/04 16:27:03 grange Exp $ */
/*
@ -18,7 +18,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: gpioow.c,v 1.12 2009/11/12 19:22:08 dyoung Exp $");
__KERNEL_RCSID(0, "$NetBSD: gpioow.c,v 1.13 2011/08/31 12:23:32 mbalmer Exp $");
/*
* 1-Wire bus bit-banging through GPIO pin.
@ -28,6 +28,7 @@ __KERNEL_RCSID(0, "$NetBSD: gpioow.c,v 1.12 2009/11/12 19:22:08 dyoung Exp $");
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/gpio.h>
#include <sys/module.h>
#include <dev/gpio/gpiovar.h>
@ -107,18 +108,20 @@ gpioow_attach(device_t parent, device_t self, void *aux)
if (gpio_pin_map(sc->sc_gpio, ga->ga_offset, ga->ga_mask,
&sc->sc_map)) {
aprint_error(": can't map pins\n");
return;
goto finish;
}
/* Configure data pin */
caps = gpio_pin_caps(sc->sc_gpio, &sc->sc_map, GPIOOW_PIN_DATA);
if (!(caps & GPIO_PIN_OUTPUT)) {
aprint_error(": data pin is unable to drive output\n");
goto fail;
gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
goto finish;
}
if (!(caps & GPIO_PIN_INPUT)) {
aprint_error(": data pin is unable to read input\n");
goto fail;
gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
goto finish;
}
aprint_normal(": DATA[%d]", sc->sc_map.pm_map[GPIOOW_PIN_DATA]);
sc->sc_data = GPIO_PIN_OUTPUT;
@ -149,10 +152,8 @@ gpioow_attach(device_t parent, device_t self, void *aux)
if (!pmf_device_register(self, NULL, NULL))
aprint_error("%s: could not establish power handler\n",
device_xname(self));
finish:
return;
fail:
gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
}
int
@ -246,3 +247,37 @@ gpioow_bb_set(void *arg, int value)
gpio_pin_write(sc->sc_gpio, &sc->sc_map, GPIOOW_PIN_DATA,
value ? GPIO_PIN_HIGH : GPIO_PIN_LOW);
}
MODULE(MODULE_CLASS_DRIVER, gpioow, "gpio,onewire");
#ifdef _MODULE
#include "ioconf.c"
#endif
static int
gpioow_modcmd(modcmd_t cmd, void *opaque)
{
int error;
error = 0;
switch (cmd) {
case MODULE_CMD_INIT:
#ifdef _MODULE
error = config_init_component(cfdriver_ioconf_gpioow,
cfattach_ioconf_gpioow, cfdata_ioconf_gpioow);
if (error)
aprint_error("%s: unable to init component\n",
gpioow_cd.cd_name);
#endif
break;
case MODULE_CMD_FINI:
#ifdef _MODULE
config_fini_component(cfdriver_ioconf_gpioow,
cfattach_ioconf_gpioow, cfdata_ioconf_gpioow);
#endif
break;
default:
error = ENOTTY;
}
return error;
}