Differential D6896 Diff 17743 sys/mips/broadcom/uart_bus_chipc.c

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sys/mips/broadcom/uart_bus_chipc.c

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	#include <machine/bus.h>			#include <machine/bus.h>
	#include <machine/resource.h>			#include <machine/resource.h>

	#include <dev/uart/uart.h>			#include <dev/uart/uart.h>
	#include <dev/uart/uart_bus.h>			#include <dev/uart/uart_bus.h>
	#include <dev/uart/uart_cpu.h>			#include <dev/uart/uart_cpu.h>

	#include <dev/bhnd/cores/chipc/chipcvar.h>

	#include "uart_if.h"			#include "uart_if.h"
	#include "bhnd_chipc_if.h"			#include "bhnd_chipc_if.h"

				#include "bcm_socinfo.h"

	static int uart_chipc_probe(device_t dev);

	extern SLIST_HEAD(uart_devinfo_list, uart_devinfo) uart_sysdevs;

	static void
	uart_chipc_identify(driver_t *driver, device_t parent)
	{
	struct chipc_caps *caps;

	if (device_find_child(parent, "uart", -1) != NULL)
	return;

	caps = BHND_CHIPC_GET_CAPS(parent);

	if (caps == NULL) {
	device_printf(parent, "error: can't retrieve ChipCommon "
	"capabilities\n");
	return;
	}

	if (caps->num_uarts == 0)
	return;

	/*
	* TODO: add more than one UART
	*/
	BUS_ADD_CHILD(parent, 0, "uart", -1);
	}

	static int			static int
	uart_chipc_probe(device_t dev)			uart_chipc_probe(device_t dev)
	{			{
	struct uart_softc *sc;			struct uart_softc *sc;
	struct resource *res;			struct bcm_socinfo *socinfo;
	int rid;
	int err;

	rid = 0;
	res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
	if (res == NULL) {
	device_printf(dev, "can't allocate main resource\n");
	return (ENXIO);
	}

	sc = device_get_softc(dev);			sc = device_get_softc(dev);
	sc->sc_class = &uart_ns8250_class;			sc->sc_class = &uart_ns8250_class;
	sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
	if (sc->sc_sysdev == NULL) {
	device_printf(dev, "missing sysdev\n");
	return (EINVAL);
	}

	bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));			/* TODO: UART rate should be calculated from CPU clock speed
				* as fetched from bhnd bus */
	sc->sc_sysdev->bas.bst = rman_get_bustag(res);			socinfo = bcm_get_socinfo();
	sc->sc_sysdev->bas.bsh = rman_get_bushandle(res);			return (uart_bus_probe(dev, 0, socinfo->uartrate, 0, 0));
	sc->sc_bas.bst = sc->sc_sysdev->bas.bst;
	sc->sc_bas.bsh = sc->sc_sysdev->bas.bsh;

	err = bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
	if (err) {
	device_printf(dev, "can't release resource [%d]\n", rid);
	return (ENXIO);
	}			}

	/* We use internal SoC clock generator with non-standart freq MHz */
	return (uart_bus_probe(dev, 0, sc->sc_sysdev->bas.rclk, 0, 0));
	}

	static device_method_t uart_chipc_methods[] = {			static device_method_t uart_chipc_methods[] = {
	/* Device interface */			/* Device interface */
	DEVMETHOD(device_identify, uart_chipc_identify),
	DEVMETHOD(device_probe, uart_chipc_probe),			DEVMETHOD(device_probe, uart_chipc_probe),
	DEVMETHOD(device_attach, uart_bus_attach),			DEVMETHOD(device_attach, uart_bus_attach),
	DEVMETHOD(device_detach, uart_bus_detach),			DEVMETHOD(device_detach, uart_bus_detach),
	{ 0, 0 }			{ 0, 0 }
	};			};

	static driver_t uart_chipc_driver = {			static driver_t uart_chipc_driver = {
	uart_driver_name,			uart_driver_name,
	uart_chipc_methods,			uart_chipc_methods,
	sizeof(struct uart_softc),			sizeof(struct uart_softc),
	};			};

	DRIVER_MODULE(uart, bhnd_chipc, uart_chipc_driver, uart_devclass, 0, 0);			DRIVER_MODULE(uart, bhnd_chipc, uart_chipc_driver, uart_devclass, 0, 0);