diff options
author | rpaulo <rpaulo@FreeBSD.org> | 2013-05-18 19:30:42 +0000 |
---|---|---|
committer | rpaulo <rpaulo@FreeBSD.org> | 2013-05-18 19:30:42 +0000 |
commit | 975536fa1ec12d689745eeb2ff628e5bf0f12e10 (patch) | |
tree | de2de1c5be669a76397d25a50b334573e9d08309 /sys/powerpc/wii | |
parent | ccd06e1d465ec6cd4e22157eea43857606b34185 (diff) | |
download | FreeBSD-src-975536fa1ec12d689745eeb2ff628e5bf0f12e10.zip FreeBSD-src-975536fa1ec12d689745eeb2ff628e5bf0f12e10.tar.gz |
Add support for the second GPIO pin bank on the Wii and add support for
shutting down the system.
Diffstat (limited to 'sys/powerpc/wii')
-rw-r--r-- | sys/powerpc/wii/wii_gpio.c | 107 | ||||
-rw-r--r-- | sys/powerpc/wii/wii_gpioreg.h | 5 |
2 files changed, 91 insertions, 21 deletions
diff --git a/sys/powerpc/wii/wii_gpio.c b/sys/powerpc/wii/wii_gpio.c index 40af773..78f6274 100644 --- a/sys/powerpc/wii/wii_gpio.c +++ b/sys/powerpc/wii/wii_gpio.c @@ -35,6 +35,7 @@ __FBSDID("$FreeBSD$"); #include <sys/malloc.h> #include <sys/rman.h> #include <sys/gpio.h> +#include <sys/reboot.h> #include <machine/bus.h> #include <machine/platform.h> @@ -55,6 +56,9 @@ struct wiigpio_softc { struct gpio_pin sc_pins[WIIGPIO_NPINS]; }; + +#define WIIGPIO_PINBANK(_p) ((_p) / (WIIGPIO_NPINS / 2)) +#define WIIGPIO_PINMASK(_p) (1 << ((_p) % (WIIGPIO_NPINS / 2))) #define WIIGPIO_LOCK(sc) mtx_lock(&(sc)->sc_mtx) #define WIIGPIO_UNLOCK(sc) mtx_unlock(&(sc)->sc_mtx) @@ -69,6 +73,7 @@ static int wiigpio_pin_getcaps(device_t, uint32_t, uint32_t *); static int wiigpio_pin_get(device_t, uint32_t, unsigned int *); static int wiigpio_pin_set(device_t, uint32_t, unsigned int); static int wiigpio_pin_toggle(device_t, uint32_t); +static void wiigpio_shutdown(void *, int); static device_method_t wiigpio_methods[] = { /* Device interface */ @@ -100,17 +105,31 @@ static devclass_t wiigpio_devclass; DRIVER_MODULE(wiigpio, wiibus, wiigpio_driver, wiigpio_devclass, 0, 0); static __inline uint32_t -wiigpio_read(struct wiigpio_softc *sc) +wiigpio_read(struct wiigpio_softc *sc, int n) +{ + + return (bus_space_read_4(sc->sc_bt, sc->sc_bh, n * 0x20)); +} + +static __inline void +wiigpio_write(struct wiigpio_softc *sc, int n, uint32_t reg) +{ + + bus_space_write_4(sc->sc_bt, sc->sc_bh, n * 0x20, reg); +} + +static __inline uint32_t +wiigpio_dir_read(struct wiigpio_softc *sc, int n) { - return (bus_space_read_4(sc->sc_bt, sc->sc_bh, 0)); + return (bus_space_read_4(sc->sc_bt, sc->sc_bh, n * 0x20 + 4)); } static __inline void -wiigpio_write(struct wiigpio_softc *sc, uint32_t reg) +wiigpio_dir_write(struct wiigpio_softc *sc, int n, uint32_t reg) { - bus_space_write_4(sc->sc_bt, sc->sc_bh, 0, reg); + bus_space_write_4(sc->sc_bt, sc->sc_bh, n * 0x20 + 4, reg); } static int @@ -126,10 +145,10 @@ wiigpio_attach(device_t dev) { struct wiigpio_softc *sc; int i; + uint32_t d; sc = device_get_softc(dev); sc->sc_dev = dev; - sc->sc_rrid = 0; sc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->sc_rrid, RF_ACTIVE); @@ -139,18 +158,37 @@ wiigpio_attach(device_t dev) } sc->sc_bt = rman_get_bustag(sc->sc_rres); sc->sc_bh = rman_get_bushandle(sc->sc_rres); - mtx_init(&sc->sc_mtx, device_get_nameunit(dev), NULL, MTX_DEF); - +#ifdef WIIGPIO_DEBUG + device_printf(dev, "dir bank0=0x%08x bank1=0x%08x\n", + wiigpio_dir_read(sc, 0), wiigpio_dir_read(sc, 1)); + device_printf(dev, "val bank0=0x%08x bank1=0x%08x\n", + wiigpio_read(sc, 0), wiigpio_read(sc, 1)); +#endif for (i = 0; i < WIIGPIO_NPINS; i++) { sc->sc_pins[i].gp_caps = GPIO_PIN_INPUT | GPIO_PIN_OUTPUT; sc->sc_pins[i].gp_pin = i; - sc->sc_pins[i].gp_flags = 0; + d = wiigpio_dir_read(sc, WIIGPIO_PINBANK(i)); + if (d & WIIGPIO_PINMASK(i)) + sc->sc_pins[i].gp_flags = GPIO_PIN_OUTPUT; + else + sc->sc_pins[i].gp_flags = GPIO_PIN_INPUT; snprintf(sc->sc_pins[i].gp_name, GPIOMAXNAME, "PIN %d", i); +#ifdef WIIGPIO_DEBUG + device_printf(dev, "PIN %d state %d flag %s\n", i, + wiigpio_read(sc, WIIGPIO_PINBANK(i)) >> + (i % (WIIGPIO_NPINS / 2)) & 1, + sc->sc_pins[i].gp_flags == GPIO_PIN_INPUT ? + "GPIO_PIN_INPUT" : "GPIO_PIN_OUTPUT"); +#endif } - device_add_child(dev, "gpioc", device_get_unit(dev)); device_add_child(dev, "gpiobus", device_get_unit(dev)); + /* + * We will be responsible for powering off the system. + */ + EVENTHANDLER_REGISTER(shutdown_final, wiigpio_shutdown, dev, + SHUTDOWN_PRI_LAST); return (bus_generic_attach(dev)); } @@ -199,8 +237,8 @@ wiigpio_pin_get(device_t dev, uint32_t pin, unsigned int *val) return (EINVAL); sc = device_get_softc(dev); WIIGPIO_LOCK(sc); - reg = wiigpio_read(sc); - *val = !!(reg & (1 << pin)); + reg = wiigpio_read(sc, WIIGPIO_PINBANK(pin)); + *val = !!(reg & WIIGPIO_PINMASK(pin)); WIIGPIO_UNLOCK(sc); return (0); @@ -210,16 +248,18 @@ static int wiigpio_pin_set(device_t dev, uint32_t pin, unsigned int value) { struct wiigpio_softc *sc; - uint32_t reg, pinmask = 1 << pin; + uint32_t reg, pinbank, pinmask; if (pin >= WIIGPIO_NPINS) return (EINVAL); sc = device_get_softc(dev); + pinbank = WIIGPIO_PINBANK(pin); + pinmask = WIIGPIO_PINMASK(pin); WIIGPIO_LOCK(sc); - reg = wiigpio_read(sc) & ~pinmask; + reg = wiigpio_read(sc, pinbank) & ~pinmask; if (value) reg |= pinmask; - wiigpio_write(sc, reg); + wiigpio_write(sc, pinbank, reg); WIIGPIO_UNLOCK(sc); return (0); @@ -229,15 +269,19 @@ static int wiigpio_pin_toggle(device_t dev, uint32_t pin) { struct wiigpio_softc *sc; - uint32_t val, pinmask = 1 << pin; + uint32_t val, pinbank, pinmask; + if (pin >= WIIGPIO_NPINS) + return (EINVAL); sc = device_get_softc(dev); + pinbank = WIIGPIO_PINBANK(pin); + pinmask = WIIGPIO_PINMASK(pin); WIIGPIO_LOCK(sc); - val = wiigpio_read(sc) & pinmask; - if (val) - wiigpio_write(sc, wiigpio_read(sc) & ~pinmask); + val = wiigpio_read(sc, pinbank); + if (val & pinmask) + wiigpio_write(sc, pinbank, val & ~pinmask); else - wiigpio_write(sc, wiigpio_read(sc) | pinmask); + wiigpio_write(sc, pinbank, val | pinmask); WIIGPIO_UNLOCK(sc); return (0); @@ -247,11 +291,24 @@ static int wiigpio_pin_setflags(device_t dev, uint32_t pin, uint32_t flags) { struct wiigpio_softc *sc; + uint32_t reg, pinbank, pinmask; if (pin >= WIIGPIO_NPINS) return (EINVAL); + if ((flags & ~(GPIO_PIN_OUTPUT|GPIO_PIN_INPUT)) != 0) + return (EINVAL); + if ((flags & (GPIO_PIN_OUTPUT|GPIO_PIN_INPUT)) == + (GPIO_PIN_OUTPUT|GPIO_PIN_INPUT)) + return (EINVAL); sc = device_get_softc(dev); + pinbank = WIIGPIO_PINBANK(pin); + pinmask = WIIGPIO_PINMASK(pin); WIIGPIO_LOCK(sc); + reg = wiigpio_dir_read(sc, WIIGPIO_PINBANK(pin)); + if (flags & GPIO_PIN_OUTPUT) + wiigpio_dir_write(sc, pinbank, reg | pinmask); + else + wiigpio_dir_write(sc, pinbank, reg & ~pinmask); sc->sc_pins[pin].gp_flags = flags; WIIGPIO_UNLOCK(sc); @@ -287,3 +344,15 @@ wiigpio_pin_getname(device_t dev, uint32_t pin, char *name) return (0); } + +static void +wiigpio_shutdown(void *xdev, int howto) +{ + device_t dev; + + if (!(howto & RB_POWEROFF)) + return; + dev = (device_t)xdev; + wiigpio_pin_setflags(dev, WIIGPIO_POWEROFF_PIN, GPIO_PIN_OUTPUT); + wiigpio_pin_set(dev, WIIGPIO_POWEROFF_PIN, 1); +} diff --git a/sys/powerpc/wii/wii_gpioreg.h b/sys/powerpc/wii/wii_gpioreg.h index ea220f9..45527f5 100644 --- a/sys/powerpc/wii/wii_gpioreg.h +++ b/sys/powerpc/wii/wii_gpioreg.h @@ -29,9 +29,10 @@ #ifndef _POWERPC_WII_WII_GPIOREG_H #define _POWERPC_WII_WII_GPIOREG_H -#define WIIGPIO_NPINS 32 +#define WIIGPIO_NPINS 64 +#define WIIGPIO_POWEROFF_PIN 33 #define WIIGPIO_REG_ADDR 0x0d8000c0 -#define WIIGPIO_REG_LEN 0x4 +#define WIIGPIO_REG_LEN 0x40 #endif /* _POWERPC_WII_WII_GPIOREG_H */ |