diff options
Diffstat (limited to 'sys/arm/versatile/versatile_sic.c')
| -rw-r--r-- | sys/arm/versatile/versatile_sic.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/sys/arm/versatile/versatile_sic.c b/sys/arm/versatile/versatile_sic.c new file mode 100644 index 0000000..d3eee6e --- /dev/null +++ b/sys/arm/versatile/versatile_sic.c @@ -0,0 +1,133 @@ +/*- + * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/ktr.h> +#include <sys/module.h> +#include <sys/rman.h> +#include <machine/bus.h> +#include <machine/intr.h> + +#include <dev/fdt/fdt_common.h> +#include <dev/ofw/openfirm.h> +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#ifdef DEBUG +#define dprintf(fmt, args...) printf(fmt, ##args) +#else +#define dprintf(fmt, args...) +#endif + +#define SIC_STATUS 0x00 +#define SIC_RAWSTAT 0x04 +#define SIC_ENABLE 0x08 +#define SIC_ENSET 0x08 +#define SIC_ENCLR 0x0C +#define SIC_SOFTINTSET 0x10 +#define SIC_SOFTINTCLR 0x14 +#define SIC_PICENABLE 0x20 +#define SIC_PICENSET 0x20 +#define SIC_PICENCLR 0x24 + +struct versatile_sic_softc { + device_t sc_dev; + struct resource * mem_res; +}; + +#define sic_read_4(sc, reg) \ + bus_read_4(sc->mem_res, (reg)) +#define sic_write_4(sc, reg, val) \ + bus_write_4(sc->mem_res, (reg), (val)) + +static int +versatile_sic_probe(device_t dev) +{ + if (!ofw_bus_is_compatible(dev, "arm,versatile-sic")) + return (ENXIO); + device_set_desc(dev, "ARM Versatile SIC"); + return (BUS_PROBE_DEFAULT); +} + +static int +versatile_sic_attach(device_t dev) +{ + struct versatile_sic_softc *sc = device_get_softc(dev); + uint32_t pass_irqs; + int rid; + + sc->sc_dev = dev; + + /* Request memory resources */ + rid = 0; + sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, + RF_ACTIVE); + if (sc->mem_res == NULL) { + device_printf(dev, "Error: could not allocate memory resources\n"); + return (ENXIO); + } + + /* Disable all interrupts on SIC */ + sic_write_4(sc, SIC_ENCLR, 0xffffffff); + + /* + * XXX: Enable IRQ3 for KMI + * Should be replaced by proper interrupts cascading + */ + sic_write_4(sc, SIC_ENSET, (1 << 3)); + + /* + * Let PCI and Ethernet interrupts pass through + * IRQ25, IRQ27..IRQ31 + */ + pass_irqs = (7 << 27) | (1 << 25); + sic_write_4(sc, SIC_PICENSET, pass_irqs); + + return (0); +} + +static device_method_t versatile_sic_methods[] = { + DEVMETHOD(device_probe, versatile_sic_probe), + DEVMETHOD(device_attach, versatile_sic_attach), + { 0, 0 } +}; + +static driver_t versatile_sic_driver = { + "sic", + versatile_sic_methods, + sizeof(struct versatile_sic_softc), +}; + +static devclass_t versatile_sic_devclass; + +DRIVER_MODULE(sic, simplebus, versatile_sic_driver, versatile_sic_devclass, 0, 0); |
