diff options
author | nwhitehorn <nwhitehorn@FreeBSD.org> | 2009-01-12 01:36:01 +0000 |
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committer | nwhitehorn <nwhitehorn@FreeBSD.org> | 2009-01-12 01:36:01 +0000 |
commit | 87790de246646477fe57a19ad166123c006a5899 (patch) | |
tree | 818bdc6fd46ed26aefdef04761aa9995cdb43bea /sys/powerpc/powermac/macgpio.c | |
parent | 53dabe7d04c7ca080411b274c3a596b97d61ae43 (diff) | |
download | FreeBSD-src-87790de246646477fe57a19ad166123c006a5899.zip FreeBSD-src-87790de246646477fe57a19ad166123c006a5899.tar.gz |
Some early Macintosh GPIO controllers don't provide reg properties for
interrupt-only GPIOs. Honor this, and allow interrupt attachment, but not
read/write access for such devices.
Reported by: Niels Eliasen
Diffstat (limited to 'sys/powerpc/powermac/macgpio.c')
-rw-r--r-- | sys/powerpc/powermac/macgpio.c | 37 |
1 files changed, 27 insertions, 10 deletions
diff --git a/sys/powerpc/powermac/macgpio.c b/sys/powerpc/powermac/macgpio.c index 7dd58a9..0d4065f 100644 --- a/sys/powerpc/powermac/macgpio.c +++ b/sys/powerpc/powermac/macgpio.c @@ -172,8 +172,14 @@ macgpio_attach(device_t dev) if (OF_getprop(child,"reg",&dinfo->gpio_num, sizeof(dinfo->gpio_num)) != sizeof(dinfo->gpio_num)) { - free(dinfo, M_MACGPIO); - continue; + /* + * Some early GPIO controllers don't provide GPIO + * numbers for GPIOs designed only to provide + * interrupt resources. We should still allow these + * to attach, but with caution. + */ + + dinfo->gpio_num = -1; } resource_list_init(&dinfo->mdi_resources); @@ -217,7 +223,7 @@ macgpio_print_child(device_t dev, device_t child) printf(" gpio %d", dinfo->gpio_num - GPIO_BASE); else if (dinfo->gpio_num >= GPIO_EXTINT_BASE) printf(" extint-gpio %d", dinfo->gpio_num - GPIO_EXTINT_BASE); - else + else if (dinfo->gpio_num >= 0) printf(" addr 0x%02x", dinfo->gpio_num); /* should not happen */ resource_list_print_type(&dinfo->mdi_resources, "irq", SYS_RES_IRQ, @@ -240,7 +246,8 @@ macgpio_probe_nomatch(device_t dev, device_t child) if ((type = ofw_bus_get_type(child)) == NULL) type = "(unknown)"; device_printf(dev, "<%s, %s>", type, ofw_bus_get_name(child)); - printf(" gpio %d",dinfo->gpio_num); + if (dinfo->gpio_num >= 0) + printf(" gpio %d",dinfo->gpio_num); resource_list_print_type(&dinfo->mdi_resources, "irq", SYS_RES_IRQ, "%ld"); printf(" (no driver attached)\n"); @@ -279,9 +286,11 @@ macgpio_activate_resource(device_t bus, device_t child, int type, int rid, if (type != SYS_RES_IRQ) return ENXIO; - val = bus_read_1(sc->sc_gpios,dinfo->gpio_num); - val |= 0x80; - bus_write_1(sc->sc_gpios,dinfo->gpio_num,val); + if (dinfo->gpio_num >= 0) { + val = bus_read_1(sc->sc_gpios,dinfo->gpio_num); + val |= 0x80; + bus_write_1(sc->sc_gpios,dinfo->gpio_num,val); + } return (bus_activate_resource(bus, type, rid, res)); } @@ -301,9 +310,11 @@ macgpio_deactivate_resource(device_t bus, device_t child, int type, int rid, if (type != SYS_RES_IRQ) return ENXIO; - val = bus_read_1(sc->sc_gpios,dinfo->gpio_num); - val &= ~0x80; - bus_write_1(sc->sc_gpios,dinfo->gpio_num,val); + if (dinfo->gpio_num >= 0) { + val = bus_read_1(sc->sc_gpios,dinfo->gpio_num); + val &= ~0x80; + bus_write_1(sc->sc_gpios,dinfo->gpio_num,val); + } return (bus_deactivate_resource(bus, type, rid, res)); } @@ -317,6 +328,9 @@ macgpio_read(device_t dev) sc = device_get_softc(device_get_parent(dev)); dinfo = device_get_ivars(dev); + if (dinfo->gpio_num < 0) + return (0); + return (bus_read_1(sc->sc_gpios,dinfo->gpio_num)); } @@ -329,6 +343,9 @@ macgpio_write(device_t dev, uint8_t val) sc = device_get_softc(device_get_parent(dev)); dinfo = device_get_ivars(dev); + if (dinfo->gpio_num < 0) + return; + bus_write_1(sc->sc_gpios,dinfo->gpio_num,val); } |